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Date: Tue, 7 Sep 2010 10:19:17 -0700
From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To: Sven Eckelmann <sven.eckelmann@....de>
Cc: davem@...emloft.net, netdev@...r.kernel.org,
b.a.t.m.a.n@...ts.open-mesh.net
Subject: Re: [PATCHv4] net: Add batman-adv meshing protocol
On Sun, Sep 05, 2010 at 02:25:53AM +0200, Sven Eckelmann wrote:
> B.A.T.M.A.N. (better approach to mobile ad-hoc networking) is a routing
> protocol for multi-hop ad-hoc mesh networks. The networks may be wired or
> wireless. See http://www.open-mesh.org/ for more information and user space
> tools.
Please see below for some questions about use of RCU.
Thanx, Paul
> Signed-off-by: Sven Eckelmann <sven.eckelmann@....de>
> ---
> batman-adv is a layer2 meshing protocol currently in
> drivers/staging/batman-adv. GregKH recently [1][2] gave us his blessing
> to leave the staging tree and move to a more suitable location.
>
> Short functionality overview:
>
> The batman-adv module is an implementation of the B.A.T.M.A.N. routing
> protocol operating on layer2 optimized for (but not limited to) wireless
> networks. Next to finding the best possible path through the network it
> encapsulates the data traffic and optimizes the transport as well. There
> also is a user space tool "batctl" which offers various functionalities
> next to a kernel module configuration interface. Detailed documentation
> can be found at the project homepage[3].
>
> Everything is addressed in the last round of comments [4].
>
> [1] https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2010-June/002881.html
> [2] https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2010-June/002968.html
> [3] http://www.open-mesh.org
> [4] https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2010-July/003138.html
>
> .../ABI/testing/sysfs-class-net-batman-adv | 14 +
> Documentation/ABI/testing/sysfs-class-net-mesh | 33 +
> Documentation/networking/batman-adv.txt | 239 ++++
> MAINTAINERS | 8 +
> net/Kconfig | 1 +
> net/Makefile | 1 +
> net/batman-adv/Kconfig | 26 +
> net/batman-adv/Makefile | 22 +
> net/batman-adv/aggregation.c | 270 ++++
> net/batman-adv/aggregation.h | 43 +
> net/batman-adv/bat_debugfs.c | 341 +++++
> net/batman-adv/bat_debugfs.h | 33 +
> net/batman-adv/bat_sysfs.c | 536 ++++++++
> net/batman-adv/bat_sysfs.h | 42 +
> net/batman-adv/bitarray.c | 201 +++
> net/batman-adv/bitarray.h | 47 +
> net/batman-adv/hard-interface.c | 596 +++++++++
> net/batman-adv/hard-interface.h | 45 +
> net/batman-adv/hash.c | 306 +++++
> net/batman-adv/hash.h | 100 ++
> net/batman-adv/icmp_socket.c | 356 +++++
> net/batman-adv/icmp_socket.h | 34 +
> net/batman-adv/main.c | 225 ++++
> net/batman-adv/main.h | 185 +++
> net/batman-adv/originator.c | 539 ++++++++
> net/batman-adv/originator.h | 36 +
> net/batman-adv/packet.h | 134 ++
> net/batman-adv/ring_buffer.c | 52 +
> net/batman-adv/ring_buffer.h | 28 +
> net/batman-adv/routing.c | 1387 ++++++++++++++++++++
> net/batman-adv/routing.h | 46 +
> net/batman-adv/send.c | 577 ++++++++
> net/batman-adv/send.h | 41 +
> net/batman-adv/soft-interface.c | 395 ++++++
> net/batman-adv/soft-interface.h | 32 +
> net/batman-adv/translation-table.c | 513 ++++++++
> net/batman-adv/translation-table.h | 45 +
> net/batman-adv/types.h | 244 ++++
> net/batman-adv/unicast.c | 265 ++++
> net/batman-adv/unicast.h | 39 +
> net/batman-adv/vis.c | 901 +++++++++++++
> net/batman-adv/vis.h | 37 +
> 42 files changed, 9015 insertions(+), 0 deletions(-)
> create mode 100644 Documentation/ABI/testing/sysfs-class-net-batman-adv
> create mode 100644 Documentation/ABI/testing/sysfs-class-net-mesh
> create mode 100644 Documentation/networking/batman-adv.txt
> create mode 100644 net/batman-adv/Kconfig
> create mode 100644 net/batman-adv/Makefile
> create mode 100644 net/batman-adv/aggregation.c
> create mode 100644 net/batman-adv/aggregation.h
> create mode 100644 net/batman-adv/bat_debugfs.c
> create mode 100644 net/batman-adv/bat_debugfs.h
> create mode 100644 net/batman-adv/bat_sysfs.c
> create mode 100644 net/batman-adv/bat_sysfs.h
> create mode 100644 net/batman-adv/bitarray.c
> create mode 100644 net/batman-adv/bitarray.h
> create mode 100644 net/batman-adv/hard-interface.c
> create mode 100644 net/batman-adv/hard-interface.h
> create mode 100644 net/batman-adv/hash.c
> create mode 100644 net/batman-adv/hash.h
> create mode 100644 net/batman-adv/icmp_socket.c
> create mode 100644 net/batman-adv/icmp_socket.h
> create mode 100644 net/batman-adv/main.c
> create mode 100644 net/batman-adv/main.h
> create mode 100644 net/batman-adv/originator.c
> create mode 100644 net/batman-adv/originator.h
> create mode 100644 net/batman-adv/packet.h
> create mode 100644 net/batman-adv/ring_buffer.c
> create mode 100644 net/batman-adv/ring_buffer.h
> create mode 100644 net/batman-adv/routing.c
> create mode 100644 net/batman-adv/routing.h
> create mode 100644 net/batman-adv/send.c
> create mode 100644 net/batman-adv/send.h
> create mode 100644 net/batman-adv/soft-interface.c
> create mode 100644 net/batman-adv/soft-interface.h
> create mode 100644 net/batman-adv/translation-table.c
> create mode 100644 net/batman-adv/translation-table.h
> create mode 100644 net/batman-adv/types.h
> create mode 100644 net/batman-adv/unicast.c
> create mode 100644 net/batman-adv/unicast.h
> create mode 100644 net/batman-adv/vis.c
> create mode 100644 net/batman-adv/vis.h
>
> diff --git a/Documentation/ABI/testing/sysfs-class-net-batman-adv b/Documentation/ABI/testing/sysfs-class-net-batman-adv
> new file mode 100644
> index 0000000..38dd762
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-class-net-batman-adv
> @@ -0,0 +1,14 @@
> +
> +What: /sys/class/net/<iface>/batman-adv/mesh_iface
> +Date: May 2010
> +Contact: Marek Lindner <lindner_marek@...oo.de>
> +Description:
> + The /sys/class/net/<iface>/batman-adv/mesh_iface file
> + displays the batman mesh interface this <iface>
> + currently is associated with.
> +
> +What: /sys/class/net/<iface>/batman-adv/iface_status
> +Date: May 2010
> +Contact: Marek Lindner <lindner_marek@...oo.de>
> +Description:
> + Indicates the status of <iface> as it is seen by batman.
> diff --git a/Documentation/ABI/testing/sysfs-class-net-mesh b/Documentation/ABI/testing/sysfs-class-net-mesh
> new file mode 100644
> index 0000000..5aa1912
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-class-net-mesh
> @@ -0,0 +1,33 @@
> +
> +What: /sys/class/net/<mesh_iface>/mesh/aggregated_ogms
> +Date: May 2010
> +Contact: Marek Lindner <lindner_marek@...oo.de>
> +Description:
> + Indicates whether the batman protocol messages of the
> + mesh <mesh_iface> shall be aggregated or not.
> +
> +What: /sys/class/net/<mesh_iface>/mesh/bonding
> +Date: June 2010
> +Contact: Simon Wunderlich <siwu@....tu-chemnitz.de>
> +Description:
> + Indicates whether the data traffic going through the
> + mesh will be sent using multiple interfaces at the
> + same time (if available).
> +
> +What: /sys/class/net/<mesh_iface>/mesh/orig_interval
> +Date: May 2010
> +Contact: Marek Lindner <lindner_marek@...oo.de>
> +Description:
> + Defines the interval in milliseconds in which batman
> + sends its protocol messages.
> +
> +What: /sys/class/net/<mesh_iface>/mesh/vis_mode
> +Date: May 2010
> +Contact: Marek Lindner <lindner_marek@...oo.de>
> +Description:
> + Each batman node only maintains information about its
> + own local neighborhood, therefore generating graphs
> + showing the topology of the entire mesh is not easily
> + feasible without having a central instance to collect
> + the local topologies from all nodes. This file allows
> + to activate the collecting (server) mode.
> diff --git a/Documentation/networking/batman-adv.txt b/Documentation/networking/batman-adv.txt
> new file mode 100644
> index 0000000..3a975fc
> --- /dev/null
> +++ b/Documentation/networking/batman-adv.txt
> @@ -0,0 +1,239 @@
> +[state: 04-09-2010]
> +
> +BATMAN-ADV
> +----------
> +
> +Batman advanced is a new approach to wireless networking which
> +does no longer operate on the IP basis. Unlike the batman daemon,
> +which exchanges information using UDP packets and sets routing
> +tables, batman-advanced operates on ISO/OSI Layer 2 only and uses
> +and routes (or better: bridges) Ethernet Frames. It emulates a
> +virtual network switch of all nodes participating. Therefore all
> +nodes appear to be link local, thus all higher operating proto-
> +cols won't be affected by any changes within the network. You can
> +run almost any protocol above batman advanced, prominent examples
> +are: IPv4, IPv6, DHCP, IPX.
> +
> +Batman advanced was implemented as a Linux kernel driver to re-
> +duce the overhead to a minimum. It does not depend on any (other)
> +network driver, and can be used on wifi as well as ethernet lan,
> +vpn, etc ... (anything with ethernet-style layer 2).
> +
> +CONFIGURATION
> +-------------
> +
> +Load the batman-adv module into your kernel:
> +
> +# insmod batman-adv.ko
> +
> +The module is now waiting for activation. You must add some in-
> +terfaces on which batman can operate. After loading the module
> +batman advanced will scan your systems interfaces to search for
> +compatible interfaces. Once found, it will create subfolders in
> +the /sys directories of each supported interface, e.g.
> +
> +# ls /sys/class/net/eth0/batman_adv/
> +# iface_status mesh_iface
> +
> +If an interface does not have the "batman_adv" subfolder it prob-
> +ably is not supported. Not supported interfaces are: loopback,
> +non-ethernet and batman's own interfaces.
> +
> +Note: After the module was loaded it will continuously watch for
> +new interfaces to verify the compatibility. There is no need to
> +reload the module if you plug your USB wifi adapter into your ma-
> +chine after batman advanced was initially loaded.
> +
> +To activate a given interface simply write "bat0" into its
> +"mesh_iface" file inside the batman_adv subfolder:
> +
> +# echo bat0 > /sys/class/net/eth0/batman_adv/mesh_iface
> +
> +Repeat this step for all interfaces you wish to add. Now batman
> +starts using/broadcasting on this/these interface(s).
> +
> +By reading the "iface_status" file you can check its status:
> +
> +# cat /sys/class/net/eth0/batman_adv/iface_status
> +# active
> +
> +To deactivate an interface you have to write "none" into its
> +"mesh_iface" file:
> +
> +# echo none > /sys/class/net/eth0/batman_adv/mesh_iface
> +
> +
> +All mesh wide settings can be found in batman's own interface
> +folder:
> +
> +# ls /sys/class/net/bat0/mesh/
> +# aggregated_ogms bonding orig_interval vis_mode
> +
> +
> +There is a special folder for debugging informations:
> +
> +# ls /sys/kernel/debug/batman_adv/bat0/
> +# originators socket transtable_global transtable_local
> +# vis_data
> +
> +
> +Some of the files contain all sort of status information regard-
> +ing the mesh network. For example, you can view the table of
> +originators (mesh participants) with:
> +
> +# cat /sys/kernel/debug/batman_adv/bat0/originators
> +
> +Other files allow to change batman's behaviour to better fit your
> +requirements. For instance, you can check the current originator
> +interval (value in milliseconds which determines how often batman
> +sends its broadcast packets):
> +
> +# cat /sys/class/net/bat0/mesh/orig_interval
> +# 1000
> +
> +and also change its value:
> +
> +# echo 3000 > /sys/class/net/bat0/mesh/orig_interval
> +
> +In very mobile scenarios, you might want to adjust the originator
> +interval to a lower value. This will make the mesh more respon-
> +sive to topology changes, but will also increase the overhead.
> +
> +
> +USAGE
> +-----
> +
> +To make use of your newly created mesh, batman advanced provides
> +a new interface "bat0" which you should use from this point on.
> +All interfaces added to batman advanced are not relevant any
> +longer because batman handles them for you. Basically, one "hands
> +over" the data by using the batman interface and batman will make
> +sure it reaches its destination.
> +
> +The "bat0" interface can be used like any other regular inter-
> +face. It needs an IP address which can be either statically con-
> +figured or dynamically (by using DHCP or similar services):
> +
> +# NodeA: ifconfig bat0 192.168.0.1
> +# NodeB: ifconfig bat0 192.168.0.2
> +# NodeB: ping 192.168.0.1
> +
> +Note: In order to avoid problems remove all IP addresses previ-
> +ously assigned to interfaces now used by batman advanced, e.g.
> +
> +# ifconfig eth0 0.0.0.0
> +
> +
> +VISUALIZATION
> +-------------
> +
> +If you want topology visualization, at least one mesh node must
> +be configured as VIS-server:
> +
> +# echo "server" > /sys/class/net/bat0/mesh/vis_mode
> +
> +Each node is either configured as "server" or as "client" (de-
> +fault: "client"). Clients send their topology data to the server
> +next to them, and server synchronize with other servers. If there
> +is no server configured (default) within the mesh, no topology
> +information will be transmitted. With these "synchronizing
> +servers", there can be 1 or more vis servers sharing the same (or
> +at least very similar) data.
> +
> +When configured as server, you can get a topology snapshot of
> +your mesh:
> +
> +# cat /sys/kernel/debug/batman_adv/bat0/vis_data
> +
> +This raw output is intended to be easily parsable and convertable
> +with other tools. Have a look at the batctl README if you want a
> +vis output in dot or json format for instance and how those out-
> +puts could then be visualised in an image.
> +
> +The raw format consists of comma separated values per entry where
> +each entry is giving information about a certain source inter-
> +face. Each entry can/has to have the following values:
> +-> "mac" - mac address of an originator's source interface
> + (each line begins with it)
> +-> "TQ mac value" - src mac's link quality towards mac address
> + of a neighbor originator's interface which
> + is being used for routing
> +-> "HNA mac" - HNA announced by source mac
> +-> "PRIMARY" - this is a primary interface
> +-> "SEC mac" - secondary mac address of source
> + (requires preceding PRIMARY)
> +
> +The TQ value has a range from 4 to 255 with 255 being the best.
> +The HNA entries are showing which hosts are connected to the mesh
> +via bat0 or being bridged into the mesh network. The PRIMARY/SEC
> +values are only applied on primary interfaces
> +
> +
> +LOGGING/DEBUGGING
> +-----------------
> +
> +All error messages, warnings and information messages are sent to
> +the kernel log. Depending on your operating system distribution
> +this can be read in one of a number of ways. Try using the com-
> +mands: dmesg, logread, or looking in the files /var/log/kern.log
> +or /var/log/syslog. All batman-adv messages are prefixed with
> +"batman-adv:" So to see just these messages try
> +
> +# dmesg | grep batman-adv
> +
> +When investigating problems with your mesh network it is some-
> +times necessary to see more detail debug messages. This must be
> +enabled when compiling the batman-adv module. When building bat-
> +man-adv as part of kernel, use "make menuconfig" and enable the
> +option "B.A.T.M.A.N. debugging".
> +
> +Those additional debug messages can be accessed using a special
> +file in debugfs
> +
> +# cat /sys/kernel/debug/batman_adv/bat0/log
> +
> +The additional debug output is by default disabled. It can be en-
> +abled during run time. Following log_levels are defined:
> +
> +0 - All debug output disabled
> +1 - Enable messages related to routing / flooding / broadcasting
> +2 - Enable route or hna added / changed / deleted
> +3 - Enable all messages
> +
> +The debug output can be changed at runtime using the file
> +/sys/class/net/bat0/mesh/log_level. e.g.
> +
> +# echo 2 > /sys/class/net/bat0/mesh/log_level
> +
> +will enable debug messages for when routes or HNAs change.
> +
> +
> +BATCTL
> +------
> +
> +As batman advanced operates on layer 2 all hosts participating in
> +the virtual switch are completely transparent for all protocols
> +above layer 2. Therefore the common diagnosis tools do not work
> +as expected. To overcome these problems batctl was created. At
> +the moment the batctl contains ping, traceroute, tcpdump and
> +interfaces to the kernel module settings.
> +
> +For more information, please see the manpage (man batctl).
> +
> +batctl is available on http://www.open-mesh.org/
> +
> +
> +CONTACT
> +-------
> +
> +Please send us comments, experiences, questions, anything :)
> +
> +IRC: #batman on irc.freenode.org
> +Mailing-list: b.a.t.m.a.n@...n-mesh.net (optional subscription
> + at https://lists.open-mesh.org/mm/listinfo/b.a.t.m.a.n)
> +
> +You can also contact the Authors:
> +
> +Marek Lindner <lindner_marek@...oo.de>
> +Simon Wunderlich <siwu@....tu-chemnitz.de>
> +
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 9aec4f2..339b244 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -1262,6 +1262,14 @@ S: Maintained
> F: drivers/video/backlight/
> F: include/linux/backlight.h
>
> +BATMAN ADVANCED
> +M: Marek Lindner <lindner_marek@...oo.de>
> +M: Simon Wunderlich <siwu@....tu-chemnitz.de>
> +L: b.a.t.m.a.n@...ts.open-mesh.net
> +W: http://www.open-mesh.org/
> +S: Maintained
> +F: net/batman-adv/
> +
> BAYCOM/HDLCDRV DRIVERS FOR AX.25
> M: Thomas Sailer <t.sailer@...mni.ethz.ch>
> L: linux-hams@...r.kernel.org
> diff --git a/net/Kconfig b/net/Kconfig
> index e330594..ffc602f 100644
> --- a/net/Kconfig
> +++ b/net/Kconfig
> @@ -214,6 +214,7 @@ source "net/ieee802154/Kconfig"
> source "net/sched/Kconfig"
> source "net/dcb/Kconfig"
> source "net/dns_resolver/Kconfig"
> +source "net/batman-adv/Kconfig"
>
> config RPS
> boolean
> diff --git a/net/Makefile b/net/Makefile
> index ea60fbc..6f211df 100644
> --- a/net/Makefile
> +++ b/net/Makefile
> @@ -68,3 +68,4 @@ obj-$(CONFIG_SYSCTL) += sysctl_net.o
> endif
> obj-$(CONFIG_WIMAX) += wimax/
> obj-$(CONFIG_DNS_RESOLVER) += dns_resolver/
> +obj-$(CONFIG_BATMAN_ADV) += batman-adv/
> diff --git a/net/batman-adv/Kconfig b/net/batman-adv/Kconfig
> new file mode 100644
> index 0000000..8553f35
> --- /dev/null
> +++ b/net/batman-adv/Kconfig
> @@ -0,0 +1,26 @@
> +#
> +# B.A.T.M.A.N meshing protocol
> +#
> +
> +config BATMAN_ADV
> + tristate "B.A.T.M.A.N. Advanced Meshing Protocol"
> + depends on NET
> + default n
> + ---help---
> +
> + B.A.T.M.A.N. (better approach to mobile ad-hoc networking) is
> + a routing protocol for multi-hop ad-hoc mesh networks. The
> + networks may be wired or wireless. See
> + http://www.open-mesh.org/ for more information and user space
> + tools.
> +
> +config BATMAN_ADV_DEBUG
> + bool "B.A.T.M.A.N. debugging"
> + depends on BATMAN_ADV != n
> + ---help---
> +
> + This is an option for use by developers; most people should
> + say N here. This enables compilation of support for
> + outputting debugging information to the kernel log. The
> + output is controlled via the module parameter debug.
> +
> diff --git a/net/batman-adv/Makefile b/net/batman-adv/Makefile
> new file mode 100644
> index 0000000..4b5c434
> --- /dev/null
> +++ b/net/batman-adv/Makefile
> @@ -0,0 +1,22 @@
> +#
> +# Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
> +#
> +# Marek Lindner, Simon Wunderlich
> +#
> +# This program is free software; you can redistribute it and/or
> +# modify it under the terms of version 2 of the GNU General Public
> +# License as published by the Free Software Foundation.
> +#
> +# This program is distributed in the hope that it will be useful, but
> +# WITHOUT ANY WARRANTY; without even the implied warranty of
> +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> +# General Public License for more details.
> +#
> +# You should have received a copy of the GNU General Public License
> +# along with this program; if not, write to the Free Software
> +# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> +# 02110-1301, USA
> +#
> +
> +obj-$(CONFIG_BATMAN_ADV) += batman-adv.o
> +batman-adv-objs := main.o bat_debugfs.o bat_sysfs.o send.o routing.o soft-interface.o icmp_socket.o translation-table.o bitarray.o hash.o ring_buffer.o vis.o hard-interface.o aggregation.o originator.o unicast.o
> diff --git a/net/batman-adv/aggregation.c b/net/batman-adv/aggregation.c
> new file mode 100644
> index 0000000..46b9c2b
> --- /dev/null
> +++ b/net/batman-adv/aggregation.c
> @@ -0,0 +1,270 @@
> +/*
> + * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner, Simon Wunderlich
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#include "main.h"
> +#include "aggregation.h"
> +#include "send.h"
> +#include "routing.h"
> +
> +/* calculate the size of the hna information for a given packet */
> +static int hna_len(struct batman_packet *batman_packet)
> +{
> + return batman_packet->num_hna * ETH_ALEN;
> +}
> +
> +/* return true if new_packet can be aggregated with forw_packet */
> +static bool can_aggregate_with(struct batman_packet *new_batman_packet,
> + int packet_len,
> + unsigned long send_time,
> + bool directlink,
> + struct batman_if *if_incoming,
> + struct forw_packet *forw_packet)
> +{
> + struct batman_packet *batman_packet =
> + (struct batman_packet *)forw_packet->skb->data;
> + int aggregated_bytes = forw_packet->packet_len + packet_len;
> +
> + /**
> + * we can aggregate the current packet to this aggregated packet
> + * if:
> + *
> + * - the send time is within our MAX_AGGREGATION_MS time
> + * - the resulting packet wont be bigger than
> + * MAX_AGGREGATION_BYTES
> + */
> +
> + if (time_before(send_time, forw_packet->send_time) &&
> + time_after_eq(send_time + msecs_to_jiffies(MAX_AGGREGATION_MS),
> + forw_packet->send_time) &&
> + (aggregated_bytes <= MAX_AGGREGATION_BYTES)) {
> +
> + /**
> + * check aggregation compatibility
> + * -> direct link packets are broadcasted on
> + * their interface only
> + * -> aggregate packet if the current packet is
> + * a "global" packet as well as the base
> + * packet
> + */
> +
> + /* packets without direct link flag and high TTL
> + * are flooded through the net */
> + if ((!directlink) &&
> + (!(batman_packet->flags & DIRECTLINK)) &&
> + (batman_packet->ttl != 1) &&
> +
> + /* own packets originating non-primary
> + * interfaces leave only that interface */
> + ((!forw_packet->own) ||
> + (forw_packet->if_incoming->if_num == 0)))
> + return true;
> +
> + /* if the incoming packet is sent via this one
> + * interface only - we still can aggregate */
> + if ((directlink) &&
> + (new_batman_packet->ttl == 1) &&
> + (forw_packet->if_incoming == if_incoming) &&
> +
> + /* packets from direct neighbors or
> + * own secondary interface packets
> + * (= secondary interface packets in general) */
> + (batman_packet->flags & DIRECTLINK ||
> + (forw_packet->own &&
> + forw_packet->if_incoming->if_num != 0)))
> + return true;
> + }
> +
> + return false;
> +}
> +
> +#define atomic_dec_not_zero(v) atomic_add_unless((v), -1, 0)
> +/* create a new aggregated packet and add this packet to it */
> +static void new_aggregated_packet(unsigned char *packet_buff, int packet_len,
> + unsigned long send_time, bool direct_link,
> + struct batman_if *if_incoming,
> + int own_packet)
> +{
> + struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
> + struct forw_packet *forw_packet_aggr;
> + unsigned long flags;
> + unsigned char *skb_buff;
> +
> + /* own packet should always be scheduled */
> + if (!own_packet) {
> + if (!atomic_dec_not_zero(&bat_priv->batman_queue_left)) {
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "batman packet queue full\n");
> + return;
> + }
> + }
> +
> + forw_packet_aggr = kmalloc(sizeof(struct forw_packet), GFP_ATOMIC);
> + if (!forw_packet_aggr) {
> + if (!own_packet)
> + atomic_inc(&bat_priv->batman_queue_left);
> + return;
> + }
> +
> + forw_packet_aggr->skb = dev_alloc_skb(MAX_AGGREGATION_BYTES +
> + sizeof(struct ethhdr));
> + if (!forw_packet_aggr->skb) {
> + if (!own_packet)
> + atomic_inc(&bat_priv->batman_queue_left);
> + kfree(forw_packet_aggr);
> + return;
> + }
> + skb_reserve(forw_packet_aggr->skb, sizeof(struct ethhdr));
> +
> + INIT_HLIST_NODE(&forw_packet_aggr->list);
> +
> + skb_buff = skb_put(forw_packet_aggr->skb, packet_len);
> + forw_packet_aggr->packet_len = packet_len;
> + memcpy(skb_buff, packet_buff, packet_len);
> +
> + forw_packet_aggr->own = own_packet;
> + forw_packet_aggr->if_incoming = if_incoming;
> + forw_packet_aggr->num_packets = 0;
> + forw_packet_aggr->direct_link_flags = 0;
> + forw_packet_aggr->send_time = send_time;
> +
> + /* save packet direct link flag status */
> + if (direct_link)
> + forw_packet_aggr->direct_link_flags |= 1;
> +
> + /* add new packet to packet list */
> + spin_lock_irqsave(&bat_priv->forw_bat_list_lock, flags);
> + hlist_add_head(&forw_packet_aggr->list, &bat_priv->forw_bat_list);
> + spin_unlock_irqrestore(&bat_priv->forw_bat_list_lock, flags);
> +
> + /* start timer for this packet */
> + INIT_DELAYED_WORK(&forw_packet_aggr->delayed_work,
> + send_outstanding_bat_packet);
> + queue_delayed_work(bat_event_workqueue,
> + &forw_packet_aggr->delayed_work,
> + send_time - jiffies);
> +}
> +
> +/* aggregate a new packet into the existing aggregation */
> +static void aggregate(struct forw_packet *forw_packet_aggr,
> + unsigned char *packet_buff,
> + int packet_len,
> + bool direct_link)
> +{
> + unsigned char *skb_buff;
> +
> + skb_buff = skb_put(forw_packet_aggr->skb, packet_len);
> + memcpy(skb_buff, packet_buff, packet_len);
> + forw_packet_aggr->packet_len += packet_len;
> + forw_packet_aggr->num_packets++;
> +
> + /* save packet direct link flag status */
> + if (direct_link)
> + forw_packet_aggr->direct_link_flags |=
> + (1 << forw_packet_aggr->num_packets);
> +}
> +
> +void add_bat_packet_to_list(struct bat_priv *bat_priv,
> + unsigned char *packet_buff, int packet_len,
> + struct batman_if *if_incoming, char own_packet,
> + unsigned long send_time)
> +{
> + /**
> + * _aggr -> pointer to the packet we want to aggregate with
> + * _pos -> pointer to the position in the queue
> + */
> + struct forw_packet *forw_packet_aggr = NULL, *forw_packet_pos = NULL;
> + struct hlist_node *tmp_node;
> + struct batman_packet *batman_packet =
> + (struct batman_packet *)packet_buff;
> + bool direct_link = batman_packet->flags & DIRECTLINK ? 1 : 0;
> + unsigned long flags;
> +
> + /* find position for the packet in the forward queue */
> + spin_lock_irqsave(&bat_priv->forw_bat_list_lock, flags);
> + /* own packets are not to be aggregated */
> + if ((atomic_read(&bat_priv->aggregation_enabled)) && (!own_packet)) {
> + hlist_for_each_entry(forw_packet_pos, tmp_node,
> + &bat_priv->forw_bat_list, list) {
> + if (can_aggregate_with(batman_packet,
> + packet_len,
> + send_time,
> + direct_link,
> + if_incoming,
> + forw_packet_pos)) {
> + forw_packet_aggr = forw_packet_pos;
> + break;
> + }
> + }
> + }
> +
> + /* nothing to aggregate with - either aggregation disabled or no
> + * suitable aggregation packet found */
> + if (forw_packet_aggr == NULL) {
> + /* the following section can run without the lock */
> + spin_unlock_irqrestore(&bat_priv->forw_bat_list_lock, flags);
> +
> + /**
> + * if we could not aggregate this packet with one of the others
> + * we hold it back for a while, so that it might be aggregated
> + * later on
> + */
> + if ((!own_packet) &&
> + (atomic_read(&bat_priv->aggregation_enabled)))
> + send_time += msecs_to_jiffies(MAX_AGGREGATION_MS);
> +
> + new_aggregated_packet(packet_buff, packet_len,
> + send_time, direct_link,
> + if_incoming, own_packet);
> + } else {
> + aggregate(forw_packet_aggr,
> + packet_buff, packet_len,
> + direct_link);
> + spin_unlock_irqrestore(&bat_priv->forw_bat_list_lock, flags);
> + }
> +}
> +
> +/* unpack the aggregated packets and process them one by one */
> +void receive_aggr_bat_packet(struct ethhdr *ethhdr, unsigned char *packet_buff,
> + int packet_len, struct batman_if *if_incoming)
> +{
> + struct batman_packet *batman_packet;
> + int buff_pos = 0;
> + unsigned char *hna_buff;
> +
> + batman_packet = (struct batman_packet *)packet_buff;
> +
> + while (aggregated_packet(buff_pos, packet_len,
> + batman_packet->num_hna)) {
> +
> + /* network to host order for our 32bit seqno, and the
> + orig_interval. */
> + batman_packet->seqno = ntohl(batman_packet->seqno);
> +
> + hna_buff = packet_buff + buff_pos + BAT_PACKET_LEN;
> + receive_bat_packet(ethhdr, batman_packet,
> + hna_buff, hna_len(batman_packet),
> + if_incoming);
> +
> + buff_pos += BAT_PACKET_LEN + hna_len(batman_packet);
> + batman_packet = (struct batman_packet *)
> + (packet_buff + buff_pos);
> + }
> +}
> diff --git a/net/batman-adv/aggregation.h b/net/batman-adv/aggregation.h
> new file mode 100644
> index 0000000..71a91b3
> --- /dev/null
> +++ b/net/batman-adv/aggregation.h
> @@ -0,0 +1,43 @@
> +/*
> + * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner, Simon Wunderlich
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#ifndef _NET_BATMAN_ADV_AGGREGATION_H_
> +#define _NET_BATMAN_ADV_AGGREGATION_H_
> +
> +#include "main.h"
> +
> +/* is there another aggregated packet here? */
> +static inline int aggregated_packet(int buff_pos, int packet_len, int num_hna)
> +{
> + int next_buff_pos = buff_pos + BAT_PACKET_LEN + (num_hna * ETH_ALEN);
> +
> + return (next_buff_pos <= packet_len) &&
> + (next_buff_pos <= MAX_AGGREGATION_BYTES);
> +}
> +
> +void add_bat_packet_to_list(struct bat_priv *bat_priv,
> + unsigned char *packet_buff, int packet_len,
> + struct batman_if *if_incoming, char own_packet,
> + unsigned long send_time);
> +void receive_aggr_bat_packet(struct ethhdr *ethhdr, unsigned char *packet_buff,
> + int packet_len, struct batman_if *if_incoming);
> +
> +#endif /* _NET_BATMAN_ADV_AGGREGATION_H_ */
> diff --git a/net/batman-adv/bat_debugfs.c b/net/batman-adv/bat_debugfs.c
> new file mode 100644
> index 0000000..507da68
> --- /dev/null
> +++ b/net/batman-adv/bat_debugfs.c
> @@ -0,0 +1,341 @@
> +/*
> + * Copyright (C) 2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#include "main.h"
> +
> +#include <linux/debugfs.h>
> +
> +#include "bat_debugfs.h"
> +#include "translation-table.h"
> +#include "originator.h"
> +#include "hard-interface.h"
> +#include "vis.h"
> +#include "icmp_socket.h"
> +
> +static struct dentry *bat_debugfs;
> +
> +#ifdef CONFIG_BATMAN_ADV_DEBUG
> +#define LOG_BUFF_MASK (log_buff_len-1)
> +#define LOG_BUFF(idx) (debug_log->log_buff[(idx) & LOG_BUFF_MASK])
> +
> +static int log_buff_len = LOG_BUF_LEN;
> +
> +static void emit_log_char(struct debug_log *debug_log, char c)
> +{
> + LOG_BUFF(debug_log->log_end) = c;
> + debug_log->log_end++;
> +
> + if (debug_log->log_end - debug_log->log_start > log_buff_len)
> + debug_log->log_start = debug_log->log_end - log_buff_len;
> +}
> +
> +static int fdebug_log(struct debug_log *debug_log, char *fmt, ...)
> +{
> + int printed_len;
> + va_list args;
> + static char debug_log_buf[256];
> + char *p;
> + unsigned long flags;
> +
> + if (!debug_log)
> + return 0;
> +
> + spin_lock_irqsave(&debug_log->lock, flags);
> + va_start(args, fmt);
> + printed_len = vscnprintf(debug_log_buf, sizeof(debug_log_buf),
> + fmt, args);
> + va_end(args);
> +
> + for (p = debug_log_buf; *p != 0; p++)
> + emit_log_char(debug_log, *p);
> +
> + spin_unlock_irqrestore(&debug_log->lock, flags);
> +
> + wake_up(&debug_log->queue_wait);
> +
> + return 0;
> +}
> +
> +int debug_log(struct bat_priv *bat_priv, char *fmt, ...)
> +{
> + va_list args;
> + char tmp_log_buf[256];
> +
> + va_start(args, fmt);
> + vscnprintf(tmp_log_buf, sizeof(tmp_log_buf), fmt, args);
> + fdebug_log(bat_priv->debug_log, "[%10u] %s",
> + (jiffies / HZ), tmp_log_buf);
> + va_end(args);
> +
> + return 0;
> +}
> +
> +static int log_open(struct inode *inode, struct file *file)
> +{
> + file->private_data = inode->i_private;
> + inc_module_count();
> + return 0;
> +}
> +
> +static int log_release(struct inode *inode, struct file *file)
> +{
> + dec_module_count();
> + return 0;
> +}
> +
> +static ssize_t log_read(struct file *file, char __user *buf,
> + size_t count, loff_t *ppos)
> +{
> + struct bat_priv *bat_priv = file->private_data;
> + struct debug_log *debug_log = bat_priv->debug_log;
> + int error, i = 0;
> + char c;
> + unsigned long flags;
> +
> + if ((file->f_flags & O_NONBLOCK) &&
> + !(debug_log->log_end - debug_log->log_start))
> + return -EAGAIN;
> +
> + if ((!buf) || (count < 0))
> + return -EINVAL;
> +
> + if (count == 0)
> + return 0;
> +
> + if (!access_ok(VERIFY_WRITE, buf, count))
> + return -EFAULT;
> +
> + error = wait_event_interruptible(debug_log->queue_wait,
> + (debug_log->log_start - debug_log->log_end));
> +
> + if (error)
> + return error;
> +
> + spin_lock_irqsave(&debug_log->lock, flags);
> +
> + while ((!error) && (i < count) &&
> + (debug_log->log_start != debug_log->log_end)) {
> + c = LOG_BUFF(debug_log->log_start);
> +
> + debug_log->log_start++;
> +
> + spin_unlock_irqrestore(&debug_log->lock, flags);
> +
> + error = __put_user(c, buf);
> +
> + spin_lock_irqsave(&debug_log->lock, flags);
> +
> + buf++;
> + i++;
> +
> + }
> +
> + spin_unlock_irqrestore(&debug_log->lock, flags);
> +
> + if (!error)
> + return i;
> +
> + return error;
> +}
> +
> +static unsigned int log_poll(struct file *file, poll_table *wait)
> +{
> + struct bat_priv *bat_priv = file->private_data;
> + struct debug_log *debug_log = bat_priv->debug_log;
> +
> + poll_wait(file, &debug_log->queue_wait, wait);
> +
> + if (debug_log->log_end - debug_log->log_start)
> + return POLLIN | POLLRDNORM;
> +
> + return 0;
> +}
> +
> +static const struct file_operations log_fops = {
> + .open = log_open,
> + .release = log_release,
> + .read = log_read,
> + .poll = log_poll,
> +};
> +
> +static int debug_log_setup(struct bat_priv *bat_priv)
> +{
> + struct dentry *d;
> +
> + if (!bat_priv->debug_dir)
> + goto err;
> +
> + bat_priv->debug_log = kzalloc(sizeof(struct debug_log), GFP_ATOMIC);
> + if (!bat_priv->debug_log)
> + goto err;
> +
> + spin_lock_init(&bat_priv->debug_log->lock);
> + init_waitqueue_head(&bat_priv->debug_log->queue_wait);
> +
> + d = debugfs_create_file("log", S_IFREG | S_IRUSR,
> + bat_priv->debug_dir, bat_priv, &log_fops);
> + if (d)
> + goto err;
> +
> + return 0;
> +
> +err:
> + return 1;
> +}
> +
> +static void debug_log_cleanup(struct bat_priv *bat_priv)
> +{
> + kfree(bat_priv->debug_log);
> + bat_priv->debug_log = NULL;
> +}
> +#else /* CONFIG_BATMAN_ADV_DEBUG */
> +static int debug_log_setup(struct bat_priv *bat_priv)
> +{
> + bat_priv->debug_log = NULL;
> + return 0;
> +}
> +
> +static void debug_log_cleanup(struct bat_priv *bat_priv)
> +{
> + return;
> +}
> +#endif
> +
> +static int originators_open(struct inode *inode, struct file *file)
> +{
> + struct net_device *net_dev = (struct net_device *)inode->i_private;
> + return single_open(file, orig_seq_print_text, net_dev);
> +}
> +
> +static int transtable_global_open(struct inode *inode, struct file *file)
> +{
> + struct net_device *net_dev = (struct net_device *)inode->i_private;
> + return single_open(file, hna_global_seq_print_text, net_dev);
> +}
> +
> +static int transtable_local_open(struct inode *inode, struct file *file)
> +{
> + struct net_device *net_dev = (struct net_device *)inode->i_private;
> + return single_open(file, hna_local_seq_print_text, net_dev);
> +}
> +
> +static int vis_data_open(struct inode *inode, struct file *file)
> +{
> + struct net_device *net_dev = (struct net_device *)inode->i_private;
> + return single_open(file, vis_seq_print_text, net_dev);
> +}
> +
> +struct bat_debuginfo {
> + struct attribute attr;
> + const struct file_operations fops;
> +};
> +
> +#define BAT_DEBUGINFO(_name, _mode, _open) \
> +struct bat_debuginfo bat_debuginfo_##_name = { \
> + .attr = { .name = __stringify(_name), \
> + .mode = _mode, }, \
> + .fops = { .owner = THIS_MODULE, \
> + .open = _open, \
> + .read = seq_read, \
> + .llseek = seq_lseek, \
> + .release = single_release, \
> + } \
> +};
> +
> +static BAT_DEBUGINFO(originators, S_IRUGO, originators_open);
> +static BAT_DEBUGINFO(transtable_global, S_IRUGO, transtable_global_open);
> +static BAT_DEBUGINFO(transtable_local, S_IRUGO, transtable_local_open);
> +static BAT_DEBUGINFO(vis_data, S_IRUGO, vis_data_open);
> +
> +static struct bat_debuginfo *mesh_debuginfos[] = {
> + &bat_debuginfo_originators,
> + &bat_debuginfo_transtable_global,
> + &bat_debuginfo_transtable_local,
> + &bat_debuginfo_vis_data,
> + NULL,
> +};
> +
> +void debugfs_init(void)
> +{
> + bat_debugfs = debugfs_create_dir(DEBUGFS_BAT_SUBDIR, NULL);
> + if (bat_debugfs == ERR_PTR(-ENODEV))
> + bat_debugfs = NULL;
> +}
> +
> +void debugfs_destroy(void)
> +{
> + if (bat_debugfs) {
> + debugfs_remove_recursive(bat_debugfs);
> + bat_debugfs = NULL;
> + }
> +}
> +
> +int debugfs_add_meshif(struct net_device *dev)
> +{
> + struct bat_priv *bat_priv = netdev_priv(dev);
> + struct bat_debuginfo **bat_debug;
> + struct dentry *file;
> +
> + if (!bat_debugfs)
> + goto out;
> +
> + bat_priv->debug_dir = debugfs_create_dir(dev->name, bat_debugfs);
> + if (!bat_priv->debug_dir)
> + goto out;
> +
> + bat_socket_setup(bat_priv);
> + debug_log_setup(bat_priv);
> +
> + for (bat_debug = mesh_debuginfos; *bat_debug; ++bat_debug) {
> + file = debugfs_create_file(((*bat_debug)->attr).name,
> + S_IFREG | ((*bat_debug)->attr).mode,
> + bat_priv->debug_dir,
> + dev, &(*bat_debug)->fops);
> + if (!file) {
> + bat_err(dev, "Can't add debugfs file: %s/%s\n",
> + dev->name, ((*bat_debug)->attr).name);
> + goto rem_attr;
> + }
> + }
> +
> + return 0;
> +rem_attr:
> + debugfs_remove_recursive(bat_priv->debug_dir);
> + bat_priv->debug_dir = NULL;
> +out:
> +#ifdef CONFIG_DEBUG_FS
> + return -ENOMEM;
> +#else
> + return 0;
> +#endif /* CONFIG_DEBUG_FS */
> +}
> +
> +void debugfs_del_meshif(struct net_device *dev)
> +{
> + struct bat_priv *bat_priv = netdev_priv(dev);
> +
> + debug_log_cleanup(bat_priv);
> +
> + if (bat_debugfs) {
> + debugfs_remove_recursive(bat_priv->debug_dir);
> + bat_priv->debug_dir = NULL;
> + }
> +}
> diff --git a/net/batman-adv/bat_debugfs.h b/net/batman-adv/bat_debugfs.h
> new file mode 100644
> index 0000000..72df532
> --- /dev/null
> +++ b/net/batman-adv/bat_debugfs.h
> @@ -0,0 +1,33 @@
> +/*
> + * Copyright (C) 2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +
> +#ifndef _NET_BATMAN_ADV_DEBUGFS_H_
> +#define _NET_BATMAN_ADV_DEBUGFS_H_
> +
> +#define DEBUGFS_BAT_SUBDIR "batman_adv"
> +
> +void debugfs_init(void);
> +void debugfs_destroy(void);
> +int debugfs_add_meshif(struct net_device *dev);
> +void debugfs_del_meshif(struct net_device *dev);
> +
> +#endif /* _NET_BATMAN_ADV_DEBUGFS_H_ */
> diff --git a/net/batman-adv/bat_sysfs.c b/net/batman-adv/bat_sysfs.c
> new file mode 100644
> index 0000000..0610169
> --- /dev/null
> +++ b/net/batman-adv/bat_sysfs.c
> @@ -0,0 +1,536 @@
> +/*
> + * Copyright (C) 2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#include "main.h"
> +#include "bat_sysfs.h"
> +#include "translation-table.h"
> +#include "originator.h"
> +#include "hard-interface.h"
> +#include "vis.h"
> +
> +#define to_dev(obj) container_of(obj, struct device, kobj)
> +
> +#define BAT_ATTR(_name, _mode, _show, _store) \
> +struct bat_attribute bat_attr_##_name = { \
> + .attr = {.name = __stringify(_name), \
> + .mode = _mode }, \
> + .show = _show, \
> + .store = _store, \
> +};
> +
> +static ssize_t show_aggr_ogms(struct kobject *kobj, struct attribute *attr,
> + char *buff)
> +{
> + struct device *dev = to_dev(kobj->parent);
> + struct bat_priv *bat_priv = netdev_priv(to_net_dev(dev));
> + int aggr_status = atomic_read(&bat_priv->aggregation_enabled);
> +
> + return sprintf(buff, "%s\n",
> + aggr_status == 0 ? "disabled" : "enabled");
> +}
> +
> +static ssize_t store_aggr_ogms(struct kobject *kobj, struct attribute *attr,
> + char *buff, size_t count)
> +{
> + struct device *dev = to_dev(kobj->parent);
> + struct net_device *net_dev = to_net_dev(dev);
> + struct bat_priv *bat_priv = netdev_priv(net_dev);
> + int aggr_tmp = -1;
> +
> + if (((count == 2) && (buff[0] == '1')) ||
> + (strncmp(buff, "enable", 6) == 0))
> + aggr_tmp = 1;
> +
> + if (((count == 2) && (buff[0] == '0')) ||
> + (strncmp(buff, "disable", 7) == 0))
> + aggr_tmp = 0;
> +
> + if (aggr_tmp < 0) {
> + if (buff[count - 1] == '\n')
> + buff[count - 1] = '\0';
> +
> + bat_info(net_dev,
> + "Invalid parameter for 'aggregate OGM' setting"
> + "received: %s\n", buff);
> + return -EINVAL;
> + }
> +
> + if (atomic_read(&bat_priv->aggregation_enabled) == aggr_tmp)
> + return count;
> +
> + bat_info(net_dev, "Changing aggregation from: %s to: %s\n",
> + atomic_read(&bat_priv->aggregation_enabled) == 1 ?
> + "enabled" : "disabled", aggr_tmp == 1 ? "enabled" :
> + "disabled");
> +
> + atomic_set(&bat_priv->aggregation_enabled, (unsigned)aggr_tmp);
> + return count;
> +}
> +
> +static ssize_t show_bond(struct kobject *kobj, struct attribute *attr,
> + char *buff)
> +{
> + struct device *dev = to_dev(kobj->parent);
> + struct bat_priv *bat_priv = netdev_priv(to_net_dev(dev));
> + int bond_status = atomic_read(&bat_priv->bonding_enabled);
> +
> + return sprintf(buff, "%s\n",
> + bond_status == 0 ? "disabled" : "enabled");
> +}
> +
> +static ssize_t store_bond(struct kobject *kobj, struct attribute *attr,
> + char *buff, size_t count)
> +{
> + struct device *dev = to_dev(kobj->parent);
> + struct net_device *net_dev = to_net_dev(dev);
> + struct bat_priv *bat_priv = netdev_priv(net_dev);
> + int bonding_enabled_tmp = -1;
> +
> + if (((count == 2) && (buff[0] == '1')) ||
> + (strncmp(buff, "enable", 6) == 0))
> + bonding_enabled_tmp = 1;
> +
> + if (((count == 2) && (buff[0] == '0')) ||
> + (strncmp(buff, "disable", 7) == 0))
> + bonding_enabled_tmp = 0;
> +
> + if (bonding_enabled_tmp < 0) {
> + if (buff[count - 1] == '\n')
> + buff[count - 1] = '\0';
> +
> + bat_err(net_dev,
> + "Invalid parameter for 'bonding' setting received: "
> + "%s\n", buff);
> + return -EINVAL;
> + }
> +
> + if (atomic_read(&bat_priv->bonding_enabled) == bonding_enabled_tmp)
> + return count;
> +
> + bat_info(net_dev, "Changing bonding from: %s to: %s\n",
> + atomic_read(&bat_priv->bonding_enabled) == 1 ?
> + "enabled" : "disabled",
> + bonding_enabled_tmp == 1 ? "enabled" : "disabled");
> +
> + atomic_set(&bat_priv->bonding_enabled, (unsigned)bonding_enabled_tmp);
> + return count;
> +}
> +
> +static ssize_t show_frag(struct kobject *kobj, struct attribute *attr,
> + char *buff)
> +{
> + struct device *dev = to_dev(kobj->parent);
> + struct bat_priv *bat_priv = netdev_priv(to_net_dev(dev));
> + int frag_status = atomic_read(&bat_priv->frag_enabled);
> +
> + return sprintf(buff, "%s\n",
> + frag_status == 0 ? "disabled" : "enabled");
> +}
> +
> +static ssize_t store_frag(struct kobject *kobj, struct attribute *attr,
> + char *buff, size_t count)
> +{
> + struct device *dev = to_dev(kobj->parent);
> + struct net_device *net_dev = to_net_dev(dev);
> + struct bat_priv *bat_priv = netdev_priv(net_dev);
> + int frag_enabled_tmp = -1;
> +
> + if (((count == 2) && (buff[0] == '1')) ||
> + (strncmp(buff, "enable", 6) == 0))
> + frag_enabled_tmp = 1;
> +
> + if (((count == 2) && (buff[0] == '0')) ||
> + (strncmp(buff, "disable", 7) == 0))
> + frag_enabled_tmp = 0;
> +
> + if (frag_enabled_tmp < 0) {
> + if (buff[count - 1] == '\n')
> + buff[count - 1] = '\0';
> +
> + bat_err(net_dev,
> + "Invalid parameter for 'fragmentation' setting on mesh"
> + "received: %s\n", buff);
> + return -EINVAL;
> + }
> +
> + if (atomic_read(&bat_priv->frag_enabled) == frag_enabled_tmp)
> + return count;
> +
> + bat_info(net_dev, "Changing fragmentation from: %s to: %s\n",
> + atomic_read(&bat_priv->frag_enabled) == 1 ?
> + "enabled" : "disabled",
> + frag_enabled_tmp == 1 ? "enabled" : "disabled");
> +
> + atomic_set(&bat_priv->frag_enabled, (unsigned)frag_enabled_tmp);
> + update_min_mtu(net_dev);
> + return count;
> +}
> +
> +static ssize_t show_vis_mode(struct kobject *kobj, struct attribute *attr,
> + char *buff)
> +{
> + struct device *dev = to_dev(kobj->parent);
> + struct bat_priv *bat_priv = netdev_priv(to_net_dev(dev));
> + int vis_mode = atomic_read(&bat_priv->vis_mode);
> +
> + return sprintf(buff, "%s\n",
> + vis_mode == VIS_TYPE_CLIENT_UPDATE ?
> + "client" : "server");
> +}
> +
> +static ssize_t store_vis_mode(struct kobject *kobj, struct attribute *attr,
> + char *buff, size_t count)
> +{
> + struct device *dev = to_dev(kobj->parent);
> + struct net_device *net_dev = to_net_dev(dev);
> + struct bat_priv *bat_priv = netdev_priv(net_dev);
> + unsigned long val;
> + int ret, vis_mode_tmp = -1;
> +
> + ret = strict_strtoul(buff, 10, &val);
> +
> + if (((count == 2) && (!ret) && (val == VIS_TYPE_CLIENT_UPDATE)) ||
> + (strncmp(buff, "client", 6) == 0) ||
> + (strncmp(buff, "off", 3) == 0))
> + vis_mode_tmp = VIS_TYPE_CLIENT_UPDATE;
> +
> + if (((count == 2) && (!ret) && (val == VIS_TYPE_SERVER_SYNC)) ||
> + (strncmp(buff, "server", 6) == 0))
> + vis_mode_tmp = VIS_TYPE_SERVER_SYNC;
> +
> + if (vis_mode_tmp < 0) {
> + if (buff[count - 1] == '\n')
> + buff[count - 1] = '\0';
> +
> + bat_info(net_dev,
> + "Invalid parameter for 'vis mode' setting received: "
> + "%s\n", buff);
> + return -EINVAL;
> + }
> +
> + if (atomic_read(&bat_priv->vis_mode) == vis_mode_tmp)
> + return count;
> +
> + bat_info(net_dev, "Changing vis mode from: %s to: %s\n",
> + atomic_read(&bat_priv->vis_mode) == VIS_TYPE_CLIENT_UPDATE ?
> + "client" : "server", vis_mode_tmp == VIS_TYPE_CLIENT_UPDATE ?
> + "client" : "server");
> +
> + atomic_set(&bat_priv->vis_mode, (unsigned)vis_mode_tmp);
> + return count;
> +}
> +
> +static ssize_t show_orig_interval(struct kobject *kobj, struct attribute *attr,
> + char *buff)
> +{
> + struct device *dev = to_dev(kobj->parent);
> + struct bat_priv *bat_priv = netdev_priv(to_net_dev(dev));
> +
> + return sprintf(buff, "%i\n",
> + atomic_read(&bat_priv->orig_interval));
> +}
> +
> +static ssize_t store_orig_interval(struct kobject *kobj, struct attribute *attr,
> + char *buff, size_t count)
> +{
> + struct device *dev = to_dev(kobj->parent);
> + struct net_device *net_dev = to_net_dev(dev);
> + struct bat_priv *bat_priv = netdev_priv(net_dev);
> + unsigned long orig_interval_tmp;
> + int ret;
> +
> + ret = strict_strtoul(buff, 10, &orig_interval_tmp);
> + if (ret) {
> + bat_info(net_dev, "Invalid parameter for 'orig_interval' "
> + "setting received: %s\n", buff);
> + return -EINVAL;
> + }
> +
> + if (orig_interval_tmp < JITTER * 2) {
> + bat_info(net_dev, "New originator interval too small: %li "
> + "(min: %i)\n", orig_interval_tmp, JITTER * 2);
> + return -EINVAL;
> + }
> +
> + if (atomic_read(&bat_priv->orig_interval) == orig_interval_tmp)
> + return count;
> +
> + bat_info(net_dev, "Changing originator interval from: %i to: %li\n",
> + atomic_read(&bat_priv->orig_interval),
> + orig_interval_tmp);
> +
> + atomic_set(&bat_priv->orig_interval, orig_interval_tmp);
> + return count;
> +}
> +
> +#ifdef CONFIG_BATMAN_ADV_DEBUG
> +static ssize_t show_log_level(struct kobject *kobj, struct attribute *attr,
> + char *buff)
> +{
> + struct device *dev = to_dev(kobj->parent);
> + struct bat_priv *bat_priv = netdev_priv(to_net_dev(dev));
> + int log_level = atomic_read(&bat_priv->log_level);
> +
> + return sprintf(buff, "%d\n", log_level);
> +}
> +
> +static ssize_t store_log_level(struct kobject *kobj, struct attribute *attr,
> + char *buff, size_t count)
> +{
> + struct device *dev = to_dev(kobj->parent);
> + struct net_device *net_dev = to_net_dev(dev);
> + struct bat_priv *bat_priv = netdev_priv(net_dev);
> + unsigned long log_level_tmp;
> + int ret;
> +
> + ret = strict_strtoul(buff, 10, &log_level_tmp);
> + if (ret) {
> + bat_info(net_dev, "Invalid parameter for 'log_level' "
> + "setting received: %s\n", buff);
> + return -EINVAL;
> + }
> +
> + if (log_level_tmp > 3) {
> + bat_info(net_dev, "New log level too big: %li "
> + "(max: %i)\n", log_level_tmp, 3);
> + return -EINVAL;
> + }
> +
> + if (atomic_read(&bat_priv->log_level) == log_level_tmp)
> + return count;
> +
> + bat_info(net_dev, "Changing log level from: %i to: %li\n",
> + atomic_read(&bat_priv->log_level),
> + log_level_tmp);
> +
> + atomic_set(&bat_priv->log_level, (unsigned)log_level_tmp);
> + return count;
> +}
> +#endif
> +
> +static BAT_ATTR(aggregated_ogms, S_IRUGO | S_IWUSR,
> + show_aggr_ogms, store_aggr_ogms);
> +static BAT_ATTR(bonding, S_IRUGO | S_IWUSR, show_bond, store_bond);
> +static BAT_ATTR(fragmentation, S_IRUGO | S_IWUSR, show_frag, store_frag);
> +static BAT_ATTR(vis_mode, S_IRUGO | S_IWUSR, show_vis_mode, store_vis_mode);
> +static BAT_ATTR(orig_interval, S_IRUGO | S_IWUSR,
> + show_orig_interval, store_orig_interval);
> +#ifdef CONFIG_BATMAN_ADV_DEBUG
> +static BAT_ATTR(log_level, S_IRUGO | S_IWUSR, show_log_level, store_log_level);
> +#endif
> +
> +static struct bat_attribute *mesh_attrs[] = {
> + &bat_attr_aggregated_ogms,
> + &bat_attr_bonding,
> + &bat_attr_fragmentation,
> + &bat_attr_vis_mode,
> + &bat_attr_orig_interval,
> +#ifdef CONFIG_BATMAN_ADV_DEBUG
> + &bat_attr_log_level,
> +#endif
> + NULL,
> +};
> +
> +int sysfs_add_meshif(struct net_device *dev)
> +{
> + struct kobject *batif_kobject = &dev->dev.kobj;
> + struct bat_priv *bat_priv = netdev_priv(dev);
> + struct bat_attribute **bat_attr;
> + int err;
> +
> + bat_priv->mesh_obj = kobject_create_and_add(SYSFS_IF_MESH_SUBDIR,
> + batif_kobject);
> + if (!bat_priv->mesh_obj) {
> + bat_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
> + SYSFS_IF_MESH_SUBDIR);
> + goto out;
> + }
> +
> + for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr) {
> + err = sysfs_create_file(bat_priv->mesh_obj,
> + &((*bat_attr)->attr));
> + if (err) {
> + bat_err(dev, "Can't add sysfs file: %s/%s/%s\n",
> + dev->name, SYSFS_IF_MESH_SUBDIR,
> + ((*bat_attr)->attr).name);
> + goto rem_attr;
> + }
> + }
> +
> + return 0;
> +
> +rem_attr:
> + for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr)
> + sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
> +
> + kobject_put(bat_priv->mesh_obj);
> + bat_priv->mesh_obj = NULL;
> +out:
> + return -ENOMEM;
> +}
> +
> +void sysfs_del_meshif(struct net_device *dev)
> +{
> + struct bat_priv *bat_priv = netdev_priv(dev);
> + struct bat_attribute **bat_attr;
> +
> + for (bat_attr = mesh_attrs; *bat_attr; ++bat_attr)
> + sysfs_remove_file(bat_priv->mesh_obj, &((*bat_attr)->attr));
> +
> + kobject_put(bat_priv->mesh_obj);
> + bat_priv->mesh_obj = NULL;
> +}
> +
> +static ssize_t show_mesh_iface(struct kobject *kobj, struct attribute *attr,
> + char *buff)
> +{
> + struct device *dev = to_dev(kobj->parent);
> + struct net_device *net_dev = to_net_dev(dev);
> + struct batman_if *batman_if = get_batman_if_by_netdev(net_dev);
> +
> + if (!batman_if)
> + return 0;
> +
> + return sprintf(buff, "%s\n",
> + batman_if->if_status == IF_NOT_IN_USE ?
> + "none" : batman_if->soft_iface->name);
> +}
> +
> +static ssize_t store_mesh_iface(struct kobject *kobj, struct attribute *attr,
> + char *buff, size_t count)
> +{
> + struct device *dev = to_dev(kobj->parent);
> + struct net_device *net_dev = to_net_dev(dev);
> + struct batman_if *batman_if = get_batman_if_by_netdev(net_dev);
> + int status_tmp = -1;
> +
> + if (!batman_if)
> + return count;
> +
> + if (buff[count - 1] == '\n')
> + buff[count - 1] = '\0';
> +
> + if (strlen(buff) >= IFNAMSIZ) {
> + pr_err("Invalid parameter for 'mesh_iface' setting received: "
> + "interface name too long '%s'\n", buff);
> + return -EINVAL;
> + }
> +
> + if (strncmp(buff, "none", 4) == 0)
> + status_tmp = IF_NOT_IN_USE;
> + else
> + status_tmp = IF_I_WANT_YOU;
> +
> + if ((batman_if->if_status == status_tmp) || ((batman_if->soft_iface) &&
> + (strncmp(batman_if->soft_iface->name, buff, IFNAMSIZ) == 0)))
> + return count;
> +
> + if (status_tmp == IF_NOT_IN_USE) {
> + rtnl_lock();
> + hardif_disable_interface(batman_if);
> + rtnl_unlock();
> + return count;
> + }
> +
> + /* if the interface already is in use */
> + if (batman_if->if_status != IF_NOT_IN_USE) {
> + rtnl_lock();
> + hardif_disable_interface(batman_if);
> + rtnl_unlock();
> + }
> +
> + return hardif_enable_interface(batman_if, buff);
> +}
> +
> +static ssize_t show_iface_status(struct kobject *kobj, struct attribute *attr,
> + char *buff)
> +{
> + struct device *dev = to_dev(kobj->parent);
> + struct net_device *net_dev = to_net_dev(dev);
> + struct batman_if *batman_if = get_batman_if_by_netdev(net_dev);
> +
> + if (!batman_if)
> + return 0;
> +
> + switch (batman_if->if_status) {
> + case IF_TO_BE_REMOVED:
> + return sprintf(buff, "disabling\n");
> + case IF_INACTIVE:
> + return sprintf(buff, "inactive\n");
> + case IF_ACTIVE:
> + return sprintf(buff, "active\n");
> + case IF_TO_BE_ACTIVATED:
> + return sprintf(buff, "enabling\n");
> + case IF_NOT_IN_USE:
> + default:
> + return sprintf(buff, "not in use\n");
> + }
> +}
> +
> +static BAT_ATTR(mesh_iface, S_IRUGO | S_IWUSR,
> + show_mesh_iface, store_mesh_iface);
> +static BAT_ATTR(iface_status, S_IRUGO, show_iface_status, NULL);
> +
> +static struct bat_attribute *batman_attrs[] = {
> + &bat_attr_mesh_iface,
> + &bat_attr_iface_status,
> + NULL,
> +};
> +
> +int sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev)
> +{
> + struct kobject *hardif_kobject = &dev->dev.kobj;
> + struct bat_attribute **bat_attr;
> + int err;
> +
> + *hardif_obj = kobject_create_and_add(SYSFS_IF_BAT_SUBDIR,
> + hardif_kobject);
> +
> + if (!*hardif_obj) {
> + bat_err(dev, "Can't add sysfs directory: %s/%s\n", dev->name,
> + SYSFS_IF_BAT_SUBDIR);
> + goto out;
> + }
> +
> + for (bat_attr = batman_attrs; *bat_attr; ++bat_attr) {
> + err = sysfs_create_file(*hardif_obj, &((*bat_attr)->attr));
> + if (err) {
> + bat_err(dev, "Can't add sysfs file: %s/%s/%s\n",
> + dev->name, SYSFS_IF_BAT_SUBDIR,
> + ((*bat_attr)->attr).name);
> + goto rem_attr;
> + }
> + }
> +
> + return 0;
> +
> +rem_attr:
> + for (bat_attr = batman_attrs; *bat_attr; ++bat_attr)
> + sysfs_remove_file(*hardif_obj, &((*bat_attr)->attr));
> +out:
> + return -ENOMEM;
> +}
> +
> +void sysfs_del_hardif(struct kobject **hardif_obj)
> +{
> + kobject_put(*hardif_obj);
> + *hardif_obj = NULL;
> +}
> diff --git a/net/batman-adv/bat_sysfs.h b/net/batman-adv/bat_sysfs.h
> new file mode 100644
> index 0000000..7f186c0
> --- /dev/null
> +++ b/net/batman-adv/bat_sysfs.h
> @@ -0,0 +1,42 @@
> +/*
> + * Copyright (C) 2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +
> +#ifndef _NET_BATMAN_ADV_SYSFS_H_
> +#define _NET_BATMAN_ADV_SYSFS_H_
> +
> +#define SYSFS_IF_MESH_SUBDIR "mesh"
> +#define SYSFS_IF_BAT_SUBDIR "batman_adv"
> +
> +struct bat_attribute {
> + struct attribute attr;
> + ssize_t (*show)(struct kobject *kobj, struct attribute *attr,
> + char *buf);
> + ssize_t (*store)(struct kobject *kobj, struct attribute *attr,
> + char *buf, size_t count);
> +};
> +
> +int sysfs_add_meshif(struct net_device *dev);
> +void sysfs_del_meshif(struct net_device *dev);
> +int sysfs_add_hardif(struct kobject **hardif_obj, struct net_device *dev);
> +void sysfs_del_hardif(struct kobject **hardif_obj);
> +
> +#endif /* _NET_BATMAN_ADV_SYSFS_H_ */
> diff --git a/net/batman-adv/bitarray.c b/net/batman-adv/bitarray.c
> new file mode 100644
> index 0000000..814274f
> --- /dev/null
> +++ b/net/batman-adv/bitarray.c
> @@ -0,0 +1,201 @@
> +/*
> + * Copyright (C) 2006-2010 B.A.T.M.A.N. contributors:
> + *
> + * Simon Wunderlich, Marek Lindner
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#include "main.h"
> +#include "bitarray.h"
> +
> +#include <linux/bitops.h>
> +
> +/* returns true if the corresponding bit in the given seq_bits indicates true
> + * and curr_seqno is within range of last_seqno */
> +uint8_t get_bit_status(TYPE_OF_WORD *seq_bits, uint32_t last_seqno,
> + uint32_t curr_seqno)
> +{
> + int32_t diff, word_offset, word_num;
> +
> + diff = last_seqno - curr_seqno;
> + if (diff < 0 || diff >= TQ_LOCAL_WINDOW_SIZE) {
> + return 0;
> + } else {
> + /* which word */
> + word_num = (last_seqno - curr_seqno) / WORD_BIT_SIZE;
> + /* which position in the selected word */
> + word_offset = (last_seqno - curr_seqno) % WORD_BIT_SIZE;
> +
> + if (seq_bits[word_num] & 1 << word_offset)
> + return 1;
> + else
> + return 0;
> + }
> +}
> +
> +/* turn corresponding bit on, so we can remember that we got the packet */
> +void bit_mark(TYPE_OF_WORD *seq_bits, int32_t n)
> +{
> + int32_t word_offset, word_num;
> +
> + /* if too old, just drop it */
> + if (n < 0 || n >= TQ_LOCAL_WINDOW_SIZE)
> + return;
> +
> + /* which word */
> + word_num = n / WORD_BIT_SIZE;
> + /* which position in the selected word */
> + word_offset = n % WORD_BIT_SIZE;
> +
> + seq_bits[word_num] |= 1 << word_offset; /* turn the position on */
> +}
> +
> +/* shift the packet array by n places. */
> +static void bit_shift(TYPE_OF_WORD *seq_bits, int32_t n)
> +{
> + int32_t word_offset, word_num;
> + int32_t i;
> +
> + if (n <= 0 || n >= TQ_LOCAL_WINDOW_SIZE)
> + return;
> +
> + word_offset = n % WORD_BIT_SIZE;/* shift how much inside each word */
> + word_num = n / WORD_BIT_SIZE; /* shift over how much (full) words */
> +
> + for (i = NUM_WORDS - 1; i > word_num; i--) {
> + /* going from old to new, so we don't overwrite the data we copy
> + * from.
> + *
> + * left is high, right is low: FEDC BA98 7654 3210
> + * ^^ ^^
> + * vvvv
> + * ^^^^ = from, vvvvv =to, we'd have word_num==1 and
> + * word_offset==WORD_BIT_SIZE/2 ????? in this example.
> + * (=24 bits)
> + *
> + * our desired output would be: 9876 5432 1000 0000
> + * */
> +
> + seq_bits[i] =
> + (seq_bits[i - word_num] << word_offset) +
> + /* take the lower port from the left half, shift it left
> + * to its final position */
> + (seq_bits[i - word_num - 1] >>
> + (WORD_BIT_SIZE-word_offset));
> + /* and the upper part of the right half and shift it left to
> + * it's position */
> + /* for our example that would be: word[0] = 9800 + 0076 =
> + * 9876 */
> + }
> + /* now for our last word, i==word_num, we only have the it's "left"
> + * half. that's the 1000 word in our example.*/
> +
> + seq_bits[i] = (seq_bits[i - word_num] << word_offset);
> +
> + /* pad the rest with 0, if there is anything */
> + i--;
> +
> + for (; i >= 0; i--)
> + seq_bits[i] = 0;
> +}
> +
> +static void bit_reset_window(TYPE_OF_WORD *seq_bits)
> +{
> + int i;
> + for (i = 0; i < NUM_WORDS; i++)
> + seq_bits[i] = 0;
> +}
> +
> +
> +/* receive and process one packet within the sequence number window.
> + *
> + * returns:
> + * 1 if the window was moved (either new or very old)
> + * 0 if the window was not moved/shifted.
> + */
> +char bit_get_packet(void *priv, TYPE_OF_WORD *seq_bits,
> + int32_t seq_num_diff, int8_t set_mark)
> +{
> + struct bat_priv *bat_priv = (struct bat_priv *)priv;
> +
> + /* sequence number is slightly older. We already got a sequence number
> + * higher than this one, so we just mark it. */
> +
> + if ((seq_num_diff <= 0) && (seq_num_diff > -TQ_LOCAL_WINDOW_SIZE)) {
> + if (set_mark)
> + bit_mark(seq_bits, -seq_num_diff);
> + return 0;
> + }
> +
> + /* sequence number is slightly newer, so we shift the window and
> + * set the mark if required */
> +
> + if ((seq_num_diff > 0) && (seq_num_diff < TQ_LOCAL_WINDOW_SIZE)) {
> + bit_shift(seq_bits, seq_num_diff);
> +
> + if (set_mark)
> + bit_mark(seq_bits, 0);
> + return 1;
> + }
> +
> + /* sequence number is much newer, probably missed a lot of packets */
> +
> + if ((seq_num_diff >= TQ_LOCAL_WINDOW_SIZE)
> + || (seq_num_diff < EXPECTED_SEQNO_RANGE)) {
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "We missed a lot of packets (%i) !\n",
> + seq_num_diff - 1);
> + bit_reset_window(seq_bits);
> + if (set_mark)
> + bit_mark(seq_bits, 0);
> + return 1;
> + }
> +
> + /* received a much older packet. The other host either restarted
> + * or the old packet got delayed somewhere in the network. The
> + * packet should be dropped without calling this function if the
> + * seqno window is protected. */
> +
> + if ((seq_num_diff <= -TQ_LOCAL_WINDOW_SIZE)
> + || (seq_num_diff >= EXPECTED_SEQNO_RANGE)) {
> +
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "Other host probably restarted!\n");
> +
> + bit_reset_window(seq_bits);
> + if (set_mark)
> + bit_mark(seq_bits, 0);
> +
> + return 1;
> + }
> +
> + /* never reached */
> + return 0;
> +}
> +
> +/* count the hamming weight, how many good packets did we receive? just count
> + * the 1's.
> + */
> +int bit_packet_count(TYPE_OF_WORD *seq_bits)
> +{
> + int i, hamming = 0;
> +
> + for (i = 0; i < NUM_WORDS; i++)
> + hamming += hweight_long(seq_bits[i]);
> +
> + return hamming;
> +}
> diff --git a/net/batman-adv/bitarray.h b/net/batman-adv/bitarray.h
> new file mode 100644
> index 0000000..d961d56
> --- /dev/null
> +++ b/net/batman-adv/bitarray.h
> @@ -0,0 +1,47 @@
> +/*
> + * Copyright (C) 2006-2010 B.A.T.M.A.N. contributors:
> + *
> + * Simon Wunderlich, Marek Lindner
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#ifndef _NET_BATMAN_ADV_BITARRAY_H_
> +#define _NET_BATMAN_ADV_BITARRAY_H_
> +
> +/* you should choose something big, if you don't want to waste cpu
> + and keep the type in sync with bit_packet_count */
> +#define TYPE_OF_WORD unsigned long
> +#define WORD_BIT_SIZE (sizeof(TYPE_OF_WORD) * 8)
> +
> +/* returns true if the corresponding bit in the given seq_bits indicates true
> + * and curr_seqno is within range of last_seqno */
> +uint8_t get_bit_status(TYPE_OF_WORD *seq_bits, uint32_t last_seqno,
> + uint32_t curr_seqno);
> +
> +/* turn corresponding bit on, so we can remember that we got the packet */
> +void bit_mark(TYPE_OF_WORD *seq_bits, int32_t n);
> +
> +
> +/* receive and process one packet, returns 1 if received seq_num is considered
> + * new, 0 if old */
> +char bit_get_packet(void *priv, TYPE_OF_WORD *seq_bits,
> + int32_t seq_num_diff, int8_t set_mark);
> +
> +/* count the hamming weight, how many good packets did we receive? */
> +int bit_packet_count(TYPE_OF_WORD *seq_bits);
> +
> +#endif /* _NET_BATMAN_ADV_BITARRAY_H_ */
> diff --git a/net/batman-adv/hard-interface.c b/net/batman-adv/hard-interface.c
> new file mode 100644
> index 0000000..a587da9
> --- /dev/null
> +++ b/net/batman-adv/hard-interface.c
> @@ -0,0 +1,596 @@
> +/*
> + * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner, Simon Wunderlich
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#include "main.h"
> +#include "hard-interface.h"
> +#include "soft-interface.h"
> +#include "send.h"
> +#include "translation-table.h"
> +#include "routing.h"
> +#include "bat_sysfs.h"
> +#include "originator.h"
> +#include "hash.h"
> +
> +#include <linux/if_arp.h>
> +
> +#define MIN(x, y) ((x) < (y) ? (x) : (y))
> +
> +struct batman_if *get_batman_if_by_netdev(struct net_device *net_dev)
> +{
> + struct batman_if *batman_if;
> +
> + rcu_read_lock();
> + list_for_each_entry_rcu(batman_if, &if_list, list) {
> + if (batman_if->net_dev == net_dev)
> + goto out;
> + }
> +
> + batman_if = NULL;
> +
> +out:
> + rcu_read_unlock();
Here we are leaking an RCU-protected pointer outside of the RCU read-side
critical section. Why is this safe?
Here is the sequence of events that I am concerned about:
1. CPU 0 executes the code above, obtains a pointer, and is about
ready to return.
2. CPU 1 executes hardif_remove_interface(), and calls
hardif_disable_interface(), which calls
hardif_deactivate_interface(), which sets ->if_status to
IF_INACTIVE. Then hardif_disable_interface() sets ->if_status
to IF_NOT_IN_USE. Then hardif_remove_interface() frees
the interface via call_rcu().
3. Of course, call_rcu() waits for an RCU grace period to elapse,
but we are no longer in an RCU read-side critical section,
so there is nothing stopping the grace period from completing
before we are done with the batman_if pointer.
Or am I missing some other interlock that prevents hardif_remove_interface()
from freeing this structure?
I have similar concerns with your other RCU read-side critical sections.
> + return batman_if;
> +}
> +
> +static int is_valid_iface(struct net_device *net_dev)
> +{
> + if (net_dev->flags & IFF_LOOPBACK)
> + return 0;
> +
> + if (net_dev->type != ARPHRD_ETHER)
> + return 0;
> +
> + if (net_dev->addr_len != ETH_ALEN)
> + return 0;
> +
> + /* no batman over batman */
> +#ifdef HAVE_NET_DEVICE_OPS
> + if (net_dev->netdev_ops->ndo_start_xmit == interface_tx)
> + return 0;
> +#else
> + if (net_dev->hard_start_xmit == interface_tx)
> + return 0;
> +#endif
> +
> + /* Device is being bridged */
> + /* if (net_dev->priv_flags & IFF_BRIDGE_PORT)
> + return 0; */
> +
> + return 1;
> +}
> +
> +static struct batman_if *get_active_batman_if(struct net_device *soft_iface)
> +{
> + struct batman_if *batman_if;
> +
> + rcu_read_lock();
> + list_for_each_entry_rcu(batman_if, &if_list, list) {
> + if (batman_if->soft_iface != soft_iface)
> + continue;
> +
> + if (batman_if->if_status == IF_ACTIVE)
> + goto out;
> + }
> +
> + batman_if = NULL;
> +
> +out:
> + rcu_read_unlock();
> + return batman_if;
> +}
> +
> +static void set_primary_if(struct bat_priv *bat_priv,
> + struct batman_if *batman_if)
> +{
> + struct batman_packet *batman_packet;
> + struct vis_packet *vis_packet;
> +
> + bat_priv->primary_if = batman_if;
> +
> + if (!bat_priv->primary_if)
> + return;
> +
> + batman_packet = (struct batman_packet *)(batman_if->packet_buff);
> + batman_packet->flags = PRIMARIES_FIRST_HOP;
> + batman_packet->ttl = TTL;
> +
> + vis_packet = (struct vis_packet *)
> + bat_priv->my_vis_info->skb_packet->data;
> + memcpy(vis_packet->vis_orig,
> + bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
> + memcpy(vis_packet->sender_orig,
> + bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
> +
> + /***
> + * hacky trick to make sure that we send the HNA information via
> + * our new primary interface
> + */
> + atomic_set(&bat_priv->hna_local_changed, 1);
> +}
> +
> +static bool hardif_is_iface_up(struct batman_if *batman_if)
> +{
> + if (batman_if->net_dev->flags & IFF_UP)
> + return true;
> +
> + return false;
> +}
> +
> +static void update_mac_addresses(struct batman_if *batman_if)
> +{
> + addr_to_string(batman_if->addr_str, batman_if->net_dev->dev_addr);
> +
> + memcpy(((struct batman_packet *)(batman_if->packet_buff))->orig,
> + batman_if->net_dev->dev_addr, ETH_ALEN);
> + memcpy(((struct batman_packet *)(batman_if->packet_buff))->prev_sender,
> + batman_if->net_dev->dev_addr, ETH_ALEN);
> +}
> +
> +static void check_known_mac_addr(uint8_t *addr)
> +{
> + struct batman_if *batman_if;
> +
> + rcu_read_lock();
> + list_for_each_entry_rcu(batman_if, &if_list, list) {
> + if ((batman_if->if_status != IF_ACTIVE) &&
> + (batman_if->if_status != IF_TO_BE_ACTIVATED))
> + continue;
> +
> + if (!compare_orig(batman_if->net_dev->dev_addr, addr))
> + continue;
> +
> + pr_warning("The newly added mac address (%pM) already exists "
> + "on: %s\n", addr, batman_if->net_dev->name);
> + pr_warning("It is strongly recommended to keep mac addresses "
> + "unique to avoid problems!\n");
> + }
> + rcu_read_unlock();
> +}
> +
> +int hardif_min_mtu(struct net_device *soft_iface)
> +{
> + struct bat_priv *bat_priv = netdev_priv(soft_iface);
> + struct batman_if *batman_if;
> + /* allow big frames if all devices are capable to do so
> + * (have MTU > 1500 + BAT_HEADER_LEN) */
> + int min_mtu = ETH_DATA_LEN;
> +
> + if (atomic_read(&bat_priv->frag_enabled))
> + goto out;
> +
> + rcu_read_lock();
> + list_for_each_entry_rcu(batman_if, &if_list, list) {
> + if ((batman_if->if_status != IF_ACTIVE) &&
> + (batman_if->if_status != IF_TO_BE_ACTIVATED))
> + continue;
> +
> + if (batman_if->soft_iface != soft_iface)
> + continue;
> +
> + min_mtu = MIN(batman_if->net_dev->mtu - BAT_HEADER_LEN,
> + min_mtu);
> + }
> + rcu_read_unlock();
> +out:
> + return min_mtu;
> +}
> +
> +/* adjusts the MTU if a new interface with a smaller MTU appeared. */
> +void update_min_mtu(struct net_device *soft_iface)
> +{
> + int min_mtu;
> +
> + min_mtu = hardif_min_mtu(soft_iface);
> + if (soft_iface->mtu != min_mtu)
> + soft_iface->mtu = min_mtu;
> +}
> +
> +static void hardif_activate_interface(struct batman_if *batman_if)
> +{
> + struct bat_priv *bat_priv;
> +
> + if (batman_if->if_status != IF_INACTIVE)
> + return;
> +
> + bat_priv = netdev_priv(batman_if->soft_iface);
> +
> + update_mac_addresses(batman_if);
> + batman_if->if_status = IF_TO_BE_ACTIVATED;
> +
> + /**
> + * the first active interface becomes our primary interface or
> + * the next active interface after the old primay interface was removed
> + */
> + if (!bat_priv->primary_if)
> + set_primary_if(bat_priv, batman_if);
> +
> + bat_info(batman_if->soft_iface, "Interface activated: %s\n",
> + batman_if->net_dev->name);
> +
> + update_min_mtu(batman_if->soft_iface);
> + return;
> +}
> +
> +static void hardif_deactivate_interface(struct batman_if *batman_if)
> +{
> + if ((batman_if->if_status != IF_ACTIVE) &&
> + (batman_if->if_status != IF_TO_BE_ACTIVATED))
> + return;
> +
> + batman_if->if_status = IF_INACTIVE;
> +
> + bat_info(batman_if->soft_iface, "Interface deactivated: %s\n",
> + batman_if->net_dev->name);
> +
> + update_min_mtu(batman_if->soft_iface);
> +}
> +
> +int hardif_enable_interface(struct batman_if *batman_if, char *iface_name)
> +{
> + struct bat_priv *bat_priv;
> + struct batman_packet *batman_packet;
> +
> + if (batman_if->if_status != IF_NOT_IN_USE)
> + goto out;
> +
> + batman_if->soft_iface = dev_get_by_name(&init_net, iface_name);
> +
> + if (!batman_if->soft_iface) {
> + batman_if->soft_iface = softif_create(iface_name);
> +
> + if (!batman_if->soft_iface)
> + goto err;
> +
> + /* dev_get_by_name() increases the reference counter for us */
> + dev_hold(batman_if->soft_iface);
> + }
> +
> + bat_priv = netdev_priv(batman_if->soft_iface);
> + batman_if->packet_len = BAT_PACKET_LEN;
> + batman_if->packet_buff = kmalloc(batman_if->packet_len, GFP_ATOMIC);
> +
> + if (!batman_if->packet_buff) {
> + bat_err(batman_if->soft_iface, "Can't add interface packet "
> + "(%s): out of memory\n", batman_if->net_dev->name);
> + goto err;
> + }
> +
> + batman_packet = (struct batman_packet *)(batman_if->packet_buff);
> + batman_packet->packet_type = BAT_PACKET;
> + batman_packet->version = COMPAT_VERSION;
> + batman_packet->flags = 0;
> + batman_packet->ttl = 2;
> + batman_packet->tq = TQ_MAX_VALUE;
> + batman_packet->num_hna = 0;
> +
> + batman_if->if_num = bat_priv->num_ifaces;
> + bat_priv->num_ifaces++;
> + batman_if->if_status = IF_INACTIVE;
> + orig_hash_add_if(batman_if, bat_priv->num_ifaces);
> +
> + batman_if->batman_adv_ptype.type = __constant_htons(ETH_P_BATMAN);
> + batman_if->batman_adv_ptype.func = batman_skb_recv;
> + batman_if->batman_adv_ptype.dev = batman_if->net_dev;
> + dev_add_pack(&batman_if->batman_adv_ptype);
> +
> + atomic_set(&batman_if->seqno, 1);
> + atomic_set(&batman_if->frag_seqno, 1);
> + bat_info(batman_if->soft_iface, "Adding interface: %s\n",
> + batman_if->net_dev->name);
> +
> + if (atomic_read(&bat_priv->frag_enabled) && batman_if->net_dev->mtu <
> + ETH_DATA_LEN + BAT_HEADER_LEN)
> + bat_info(batman_if->soft_iface,
> + "The MTU of interface %s is too small (%i) to handle "
> + "the transport of batman-adv packets. Packets going "
> + "over this interface will be fragmented on layer2 "
> + "which could impact the performance. Setting the MTU "
> + "to %zi would solve the problem.\n",
> + batman_if->net_dev->name, batman_if->net_dev->mtu,
> + ETH_DATA_LEN + BAT_HEADER_LEN);
> +
> + if (!atomic_read(&bat_priv->frag_enabled) && batman_if->net_dev->mtu <
> + ETH_DATA_LEN + BAT_HEADER_LEN)
> + bat_info(batman_if->soft_iface,
> + "The MTU of interface %s is too small (%i) to handle "
> + "the transport of batman-adv packets. If you experience"
> + " problems getting traffic through try increasing the "
> + "MTU to %zi.\n",
> + batman_if->net_dev->name, batman_if->net_dev->mtu,
> + ETH_DATA_LEN + BAT_HEADER_LEN);
> +
> + if (hardif_is_iface_up(batman_if))
> + hardif_activate_interface(batman_if);
> + else
> + bat_err(batman_if->soft_iface, "Not using interface %s "
> + "(retrying later): interface not active\n",
> + batman_if->net_dev->name);
> +
> + /* begin scheduling originator messages on that interface */
> + schedule_own_packet(batman_if);
> +
> +out:
> + return 0;
> +
> +err:
> + return -ENOMEM;
> +}
> +
> +void hardif_disable_interface(struct batman_if *batman_if)
> +{
> + struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
> +
> + if (batman_if->if_status == IF_ACTIVE)
> + hardif_deactivate_interface(batman_if);
> +
> + if (batman_if->if_status != IF_INACTIVE)
> + return;
> +
> + bat_info(batman_if->soft_iface, "Removing interface: %s\n",
> + batman_if->net_dev->name);
> + dev_remove_pack(&batman_if->batman_adv_ptype);
> +
> + bat_priv->num_ifaces--;
> + orig_hash_del_if(batman_if, bat_priv->num_ifaces);
> +
> + if (batman_if == bat_priv->primary_if)
> + set_primary_if(bat_priv,
> + get_active_batman_if(batman_if->soft_iface));
> +
> + kfree(batman_if->packet_buff);
> + batman_if->packet_buff = NULL;
> + batman_if->if_status = IF_NOT_IN_USE;
> +
> + /* delete all references to this batman_if */
> + purge_orig_ref(bat_priv);
> + purge_outstanding_packets(bat_priv, batman_if);
> + dev_put(batman_if->soft_iface);
> +
> + /* nobody uses this interface anymore */
> + if (!bat_priv->num_ifaces)
> + softif_destroy(batman_if->soft_iface);
> +
> + batman_if->soft_iface = NULL;
> +}
> +
> +static struct batman_if *hardif_add_interface(struct net_device *net_dev)
> +{
> + struct batman_if *batman_if;
> + int ret;
> +
> + ret = is_valid_iface(net_dev);
> + if (ret != 1)
> + goto out;
> +
> + dev_hold(net_dev);
> +
> + batman_if = kmalloc(sizeof(struct batman_if), GFP_ATOMIC);
> + if (!batman_if) {
> + pr_err("Can't add interface (%s): out of memory\n",
> + net_dev->name);
> + goto release_dev;
> + }
> +
> + ret = sysfs_add_hardif(&batman_if->hardif_obj, net_dev);
> + if (ret)
> + goto free_if;
> +
> + batman_if->if_num = -1;
> + batman_if->net_dev = net_dev;
> + batman_if->soft_iface = NULL;
> + batman_if->if_status = IF_NOT_IN_USE;
> + INIT_LIST_HEAD(&batman_if->list);
> +
> + check_known_mac_addr(batman_if->net_dev->dev_addr);
> + list_add_tail_rcu(&batman_if->list, &if_list);
> + return batman_if;
> +
> +free_if:
> + kfree(batman_if);
> +release_dev:
> + dev_put(net_dev);
> +out:
> + return NULL;
> +}
> +
> +static void hardif_free_interface(struct rcu_head *rcu)
> +{
> + struct batman_if *batman_if = container_of(rcu, struct batman_if, rcu);
> +
> + kfree(batman_if);
> +}
> +
> +static void hardif_remove_interface(struct batman_if *batman_if)
> +{
> + /* first deactivate interface */
> + if (batman_if->if_status != IF_NOT_IN_USE)
> + hardif_disable_interface(batman_if);
> +
> + if (batman_if->if_status != IF_NOT_IN_USE)
> + return;
> +
> + batman_if->if_status = IF_TO_BE_REMOVED;
> + list_del_rcu(&batman_if->list);
> + sysfs_del_hardif(&batman_if->hardif_obj);
> + dev_put(batman_if->net_dev);
> + call_rcu(&batman_if->rcu, hardif_free_interface);
> +}
> +
> +void hardif_remove_interfaces(void)
> +{
> + struct batman_if *batman_if, *batman_if_tmp;
> +
> + list_for_each_entry_safe(batman_if, batman_if_tmp, &if_list, list) {
> + rtnl_lock();
> + hardif_remove_interface(batman_if);
> + rtnl_unlock();
> + }
> +}
> +
> +static int hard_if_event(struct notifier_block *this,
> + unsigned long event, void *ptr)
> +{
> + struct net_device *net_dev = (struct net_device *)ptr;
> + struct batman_if *batman_if = get_batman_if_by_netdev(net_dev);
> + struct bat_priv *bat_priv;
> +
> + if (!batman_if && event == NETDEV_REGISTER)
> + batman_if = hardif_add_interface(net_dev);
> +
> + if (!batman_if)
> + goto out;
> +
> + switch (event) {
> + case NETDEV_UP:
> + hardif_activate_interface(batman_if);
> + break;
> + case NETDEV_GOING_DOWN:
> + case NETDEV_DOWN:
> + hardif_deactivate_interface(batman_if);
> + break;
> + case NETDEV_UNREGISTER:
> + hardif_remove_interface(batman_if);
> + break;
> + case NETDEV_CHANGEMTU:
> + if (batman_if->soft_iface)
> + update_min_mtu(batman_if->soft_iface);
> + break;
> + case NETDEV_CHANGEADDR:
> + if (batman_if->if_status == IF_NOT_IN_USE)
> + goto out;
> +
> + check_known_mac_addr(batman_if->net_dev->dev_addr);
> + update_mac_addresses(batman_if);
> +
> + bat_priv = netdev_priv(batman_if->soft_iface);
> + if (batman_if == bat_priv->primary_if)
> + set_primary_if(bat_priv, batman_if);
> + break;
> + default:
> + break;
> + };
> +
> +out:
> + return NOTIFY_DONE;
> +}
> +
> +/* receive a packet with the batman ethertype coming on a hard
> + * interface */
> +int batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
> + struct packet_type *ptype, struct net_device *orig_dev)
> +{
> + struct bat_priv *bat_priv;
> + struct batman_packet *batman_packet;
> + struct batman_if *batman_if;
> + int ret;
> +
> + batman_if = container_of(ptype, struct batman_if, batman_adv_ptype);
> + skb = skb_share_check(skb, GFP_ATOMIC);
> +
> + /* skb was released by skb_share_check() */
> + if (!skb)
> + goto err_out;
> +
> + /* packet should hold at least type and version */
> + if (unlikely(!pskb_may_pull(skb, 2)))
> + goto err_free;
> +
> + /* expect a valid ethernet header here. */
> + if (unlikely(skb->mac_len != sizeof(struct ethhdr)
> + || !skb_mac_header(skb)))
> + goto err_free;
> +
> + if (!batman_if->soft_iface)
> + goto err_free;
> +
> + bat_priv = netdev_priv(batman_if->soft_iface);
> +
> + if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE)
> + goto err_free;
> +
> + /* discard frames on not active interfaces */
> + if (batman_if->if_status != IF_ACTIVE)
> + goto err_free;
> +
> + batman_packet = (struct batman_packet *)skb->data;
> +
> + if (batman_packet->version != COMPAT_VERSION) {
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "Drop packet: incompatible batman version (%i)\n",
> + batman_packet->version);
> + goto err_free;
> + }
> +
> + /* all receive handlers return whether they received or reused
> + * the supplied skb. if not, we have to free the skb. */
> +
> + switch (batman_packet->packet_type) {
> + /* batman originator packet */
> + case BAT_PACKET:
> + ret = recv_bat_packet(skb, batman_if);
> + break;
> +
> + /* batman icmp packet */
> + case BAT_ICMP:
> + ret = recv_icmp_packet(skb, batman_if);
> + break;
> +
> + /* unicast packet */
> + case BAT_UNICAST:
> + ret = recv_unicast_packet(skb, batman_if);
> + break;
> +
> + /* fragmented unicast packet */
> + case BAT_UNICAST_FRAG:
> + ret = recv_ucast_frag_packet(skb, batman_if);
> + break;
> +
> + /* broadcast packet */
> + case BAT_BCAST:
> + ret = recv_bcast_packet(skb, batman_if);
> + break;
> +
> + /* vis packet */
> + case BAT_VIS:
> + ret = recv_vis_packet(skb, batman_if);
> + break;
> + default:
> + ret = NET_RX_DROP;
> + }
> +
> + if (ret == NET_RX_DROP)
> + kfree_skb(skb);
> +
> + /* return NET_RX_SUCCESS in any case as we
> + * most probably dropped the packet for
> + * routing-logical reasons. */
> +
> + return NET_RX_SUCCESS;
> +
> +err_free:
> + kfree_skb(skb);
> +err_out:
> + return NET_RX_DROP;
> +}
> +
> +struct notifier_block hard_if_notifier = {
> + .notifier_call = hard_if_event,
> +};
> diff --git a/net/batman-adv/hard-interface.h b/net/batman-adv/hard-interface.h
> new file mode 100644
> index 0000000..4b49527
> --- /dev/null
> +++ b/net/batman-adv/hard-interface.h
> @@ -0,0 +1,45 @@
> +/*
> + * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner, Simon Wunderlich
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#ifndef _NET_BATMAN_ADV_HARD_INTERFACE_H_
> +#define _NET_BATMAN_ADV_HARD_INTERFACE_H_
> +
> +#define IF_NOT_IN_USE 0
> +#define IF_TO_BE_REMOVED 1
> +#define IF_INACTIVE 2
> +#define IF_ACTIVE 3
> +#define IF_TO_BE_ACTIVATED 4
> +#define IF_I_WANT_YOU 5
> +
> +extern struct notifier_block hard_if_notifier;
> +
> +struct batman_if *get_batman_if_by_netdev(struct net_device *net_dev);
> +int hardif_enable_interface(struct batman_if *batman_if, char *iface_name);
> +void hardif_disable_interface(struct batman_if *batman_if);
> +void hardif_remove_interfaces(void);
> +int batman_skb_recv(struct sk_buff *skb,
> + struct net_device *dev,
> + struct packet_type *ptype,
> + struct net_device *orig_dev);
> +int hardif_min_mtu(struct net_device *soft_iface);
> +void update_min_mtu(struct net_device *soft_iface);
> +
> +#endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */
> diff --git a/net/batman-adv/hash.c b/net/batman-adv/hash.c
> new file mode 100644
> index 0000000..8ef26eb
> --- /dev/null
> +++ b/net/batman-adv/hash.c
> @@ -0,0 +1,306 @@
> +/*
> + * Copyright (C) 2006-2010 B.A.T.M.A.N. contributors:
> + *
> + * Simon Wunderlich, Marek Lindner
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#include "main.h"
> +#include "hash.h"
> +
> +/* clears the hash */
> +static void hash_init(struct hashtable_t *hash)
> +{
> + int i;
> +
> + hash->elements = 0;
> +
> + for (i = 0 ; i < hash->size; i++)
> + hash->table[i] = NULL;
> +}
> +
> +/* remove the hash structure. if hashdata_free_cb != NULL, this function will be
> + * called to remove the elements inside of the hash. if you don't remove the
> + * elements, memory might be leaked. */
> +void hash_delete(struct hashtable_t *hash, hashdata_free_cb free_cb, void *arg)
> +{
> + struct element_t *bucket, *last_bucket;
> + int i;
> +
> + for (i = 0; i < hash->size; i++) {
> + bucket = hash->table[i];
> +
> + while (bucket != NULL) {
> + if (free_cb != NULL)
> + free_cb(bucket->data, arg);
> +
> + last_bucket = bucket;
> + bucket = bucket->next;
> + kfree(last_bucket);
> + }
> + }
> +
> + hash_destroy(hash);
> +}
> +
> +/* free only the hashtable and the hash itself. */
> +void hash_destroy(struct hashtable_t *hash)
> +{
> + kfree(hash->table);
> + kfree(hash);
> +}
> +
> +/* iterate though the hash. First element is selected if an iterator
> + * initialized with HASHIT() is supplied as iter. Use the returned
> + * (or supplied) iterator to access the elements until hash_iterate returns
> + * NULL. */
> +
> +struct hash_it_t *hash_iterate(struct hashtable_t *hash,
> + struct hash_it_t *iter)
> +{
> + if (!hash)
> + return NULL;
> + if (!iter)
> + return NULL;
> +
> + /* sanity checks first (if our bucket got deleted in the last
> + * iteration): */
> + if (iter->bucket != NULL) {
> + if (iter->first_bucket != NULL) {
> + /* we're on the first element and it got removed after
> + * the last iteration. */
> + if ((*iter->first_bucket) != iter->bucket) {
> + /* there are still other elements in the list */
> + if ((*iter->first_bucket) != NULL) {
> + iter->prev_bucket = NULL;
> + iter->bucket = (*iter->first_bucket);
> + iter->first_bucket =
> + &hash->table[iter->index];
> + return iter;
> + } else {
> + iter->bucket = NULL;
> + }
> + }
> + } else if (iter->prev_bucket != NULL) {
> + /*
> + * we're not on the first element, and the bucket got
> + * removed after the last iteration. the last bucket's
> + * next pointer is not pointing to our actual bucket
> + * anymore. select the next.
> + */
> + if (iter->prev_bucket->next != iter->bucket)
> + iter->bucket = iter->prev_bucket;
> + }
> + }
> +
> + /* now as we are sane, select the next one if there is some */
> + if (iter->bucket != NULL) {
> + if (iter->bucket->next != NULL) {
> + iter->prev_bucket = iter->bucket;
> + iter->bucket = iter->bucket->next;
> + iter->first_bucket = NULL;
> + return iter;
> + }
> + }
> +
> + /* if not returned yet, we've reached the last one on the index and have
> + * to search forward */
> + iter->index++;
> + /* go through the entries of the hash table */
> + while (iter->index < hash->size) {
> + if ((hash->table[iter->index]) != NULL) {
> + iter->prev_bucket = NULL;
> + iter->bucket = hash->table[iter->index];
> + iter->first_bucket = &hash->table[iter->index];
> + return iter;
> + } else {
> + iter->index++;
> + }
> + }
> +
> + /* nothing to iterate over anymore */
> + return NULL;
> +}
> +
> +/* allocates and clears the hash */
> +struct hashtable_t *hash_new(int size, hashdata_compare_cb compare,
> + hashdata_choose_cb choose)
> +{
> + struct hashtable_t *hash;
> +
> + hash = kmalloc(sizeof(struct hashtable_t) , GFP_ATOMIC);
> +
> + if (hash == NULL)
> + return NULL;
> +
> + hash->size = size;
> + hash->table = kmalloc(sizeof(struct element_t *) * size, GFP_ATOMIC);
> +
> + if (hash->table == NULL) {
> + kfree(hash);
> + return NULL;
> + }
> +
> + hash_init(hash);
> +
> + hash->compare = compare;
> + hash->choose = choose;
> +
> + return hash;
> +}
> +
> +/* adds data to the hashtable. returns 0 on success, -1 on error */
> +int hash_add(struct hashtable_t *hash, void *data)
> +{
> + int index;
> + struct element_t *bucket, *prev_bucket = NULL;
> +
> + if (!hash)
> + return -1;
> +
> + index = hash->choose(data, hash->size);
> + bucket = hash->table[index];
> +
> + while (bucket != NULL) {
> + if (hash->compare(bucket->data, data))
> + return -1;
> +
> + prev_bucket = bucket;
> + bucket = bucket->next;
> + }
> +
> + /* found the tail of the list, add new element */
> + bucket = kmalloc(sizeof(struct element_t), GFP_ATOMIC);
> +
> + if (bucket == NULL)
> + return -1;
> +
> + bucket->data = data;
> + bucket->next = NULL;
> +
> + /* and link it */
> + if (prev_bucket == NULL)
> + hash->table[index] = bucket;
> + else
> + prev_bucket->next = bucket;
> +
> + hash->elements++;
> + return 0;
> +}
> +
> +/* finds data, based on the key in keydata. returns the found data on success,
> + * or NULL on error */
> +void *hash_find(struct hashtable_t *hash, void *keydata)
> +{
> + int index;
> + struct element_t *bucket;
> +
> + if (!hash)
> + return NULL;
> +
> + index = hash->choose(keydata , hash->size);
> + bucket = hash->table[index];
> +
> + while (bucket != NULL) {
> + if (hash->compare(bucket->data, keydata))
> + return bucket->data;
> +
> + bucket = bucket->next;
> + }
> +
> + return NULL;
> +}
> +
> +/* remove bucket (this might be used in hash_iterate() if you already found the
> + * bucket you want to delete and don't need the overhead to find it again with
> + * hash_remove(). But usually, you don't want to use this function, as it
> + * fiddles with hash-internals. */
> +void *hash_remove_bucket(struct hashtable_t *hash, struct hash_it_t *hash_it_t)
> +{
> + void *data_save;
> +
> + data_save = hash_it_t->bucket->data;
> +
> + if (hash_it_t->prev_bucket != NULL)
> + hash_it_t->prev_bucket->next = hash_it_t->bucket->next;
> + else if (hash_it_t->first_bucket != NULL)
> + (*hash_it_t->first_bucket) = hash_it_t->bucket->next;
> +
> + kfree(hash_it_t->bucket);
> + hash->elements--;
> +
> + return data_save;
> +}
> +
> +/* removes data from hash, if found. returns pointer do data on success, so you
> + * can remove the used structure yourself, or NULL on error . data could be the
> + * structure you use with just the key filled, we just need the key for
> + * comparing. */
> +void *hash_remove(struct hashtable_t *hash, void *data)
> +{
> + struct hash_it_t hash_it_t;
> +
> + hash_it_t.index = hash->choose(data, hash->size);
> + hash_it_t.bucket = hash->table[hash_it_t.index];
> + hash_it_t.prev_bucket = NULL;
> +
> + while (hash_it_t.bucket != NULL) {
> + if (hash->compare(hash_it_t.bucket->data, data)) {
> + hash_it_t.first_bucket =
> + (hash_it_t.bucket ==
> + hash->table[hash_it_t.index] ?
> + &hash->table[hash_it_t.index] : NULL);
> + return hash_remove_bucket(hash, &hash_it_t);
> + }
> +
> + hash_it_t.prev_bucket = hash_it_t.bucket;
> + hash_it_t.bucket = hash_it_t.bucket->next;
> + }
> +
> + return NULL;
> +}
> +
> +/* resize the hash, returns the pointer to the new hash or NULL on
> + * error. removes the old hash on success. */
> +struct hashtable_t *hash_resize(struct hashtable_t *hash, int size)
> +{
> + struct hashtable_t *new_hash;
> + struct element_t *bucket;
> + int i;
> +
> + /* initialize a new hash with the new size */
> + new_hash = hash_new(size, hash->compare, hash->choose);
> +
> + if (new_hash == NULL)
> + return NULL;
> +
> + /* copy the elements */
> + for (i = 0; i < hash->size; i++) {
> + bucket = hash->table[i];
> +
> + while (bucket != NULL) {
> + hash_add(new_hash, bucket->data);
> + bucket = bucket->next;
> + }
> + }
> +
> + /* remove hash and eventual overflow buckets but not the content
> + * itself. */
> + hash_delete(hash, NULL, NULL);
> +
> + return new_hash;
> +}
> diff --git a/net/batman-adv/hash.h b/net/batman-adv/hash.h
> new file mode 100644
> index 0000000..2c8e176
> --- /dev/null
> +++ b/net/batman-adv/hash.h
> @@ -0,0 +1,100 @@
> +/*
> + * Copyright (C) 2006-2010 B.A.T.M.A.N. contributors:
> + *
> + * Simon Wunderlich, Marek Lindner
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#ifndef _NET_BATMAN_ADV_HASH_H_
> +#define _NET_BATMAN_ADV_HASH_H_
> +
> +#define HASHIT(name) struct hash_it_t name = { \
> + .index = -1, .bucket = NULL, \
> + .prev_bucket = NULL, \
> + .first_bucket = NULL }
> +
> +
> +typedef int (*hashdata_compare_cb)(void *, void *);
> +typedef int (*hashdata_choose_cb)(void *, int);
> +typedef void (*hashdata_free_cb)(void *, void *);
> +
> +struct element_t {
> + void *data; /* pointer to the data */
> + struct element_t *next; /* overflow bucket pointer */
> +};
> +
> +struct hash_it_t {
> + int index;
> + struct element_t *bucket;
> + struct element_t *prev_bucket;
> + struct element_t **first_bucket;
> +};
> +
> +struct hashtable_t {
> + struct element_t **table; /* the hashtable itself, with the buckets */
> + int elements; /* number of elements registered */
> + int size; /* size of hashtable */
> + hashdata_compare_cb compare;/* callback to a compare function. should
> + * compare 2 element datas for their keys,
> + * return 0 if same and not 0 if not
> + * same */
> + hashdata_choose_cb choose; /* the hashfunction, should return an index
> + * based on the key in the data of the first
> + * argument and the size the second */
> +};
> +
> +/* allocates and clears the hash */
> +struct hashtable_t *hash_new(int size, hashdata_compare_cb compare,
> + hashdata_choose_cb choose);
> +
> +/* remove bucket (this might be used in hash_iterate() if you already found the
> + * bucket you want to delete and don't need the overhead to find it again with
> + * hash_remove(). But usually, you don't want to use this function, as it
> + * fiddles with hash-internals. */
> +void *hash_remove_bucket(struct hashtable_t *hash, struct hash_it_t *hash_it_t);
> +
> +/* remove the hash structure. if hashdata_free_cb != NULL, this function will be
> + * called to remove the elements inside of the hash. if you don't remove the
> + * elements, memory might be leaked. */
> +void hash_delete(struct hashtable_t *hash, hashdata_free_cb free_cb, void *arg);
> +
> +/* free only the hashtable and the hash itself. */
> +void hash_destroy(struct hashtable_t *hash);
> +
> +/* adds data to the hashtable. returns 0 on success, -1 on error */
> +int hash_add(struct hashtable_t *hash, void *data);
> +
> +/* removes data from hash, if found. returns pointer do data on success, so you
> + * can remove the used structure yourself, or NULL on error . data could be the
> + * structure you use with just the key filled, we just need the key for
> + * comparing. */
> +void *hash_remove(struct hashtable_t *hash, void *data);
> +
> +/* finds data, based on the key in keydata. returns the found data on success,
> + * or NULL on error */
> +void *hash_find(struct hashtable_t *hash, void *keydata);
> +
> +/* resize the hash, returns the pointer to the new hash or NULL on
> + * error. removes the old hash on success */
> +struct hashtable_t *hash_resize(struct hashtable_t *hash, int size);
> +
> +/* iterate though the hash. first element is selected with iter_in NULL. use
> + * the returned iterator to access the elements until hash_it_t returns NULL. */
> +struct hash_it_t *hash_iterate(struct hashtable_t *hash,
> + struct hash_it_t *iter_in);
> +
> +#endif /* _NET_BATMAN_ADV_HASH_H_ */
> diff --git a/net/batman-adv/icmp_socket.c b/net/batman-adv/icmp_socket.c
> new file mode 100644
> index 0000000..24627be
> --- /dev/null
> +++ b/net/batman-adv/icmp_socket.c
> @@ -0,0 +1,356 @@
> +/*
> + * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#include "main.h"
> +#include <linux/debugfs.h>
> +#include <linux/slab.h>
> +#include "icmp_socket.h"
> +#include "send.h"
> +#include "types.h"
> +#include "hash.h"
> +#include "hard-interface.h"
> +
> +
> +static struct socket_client *socket_client_hash[256];
> +
> +static void bat_socket_add_packet(struct socket_client *socket_client,
> + struct icmp_packet_rr *icmp_packet,
> + size_t icmp_len);
> +
> +void bat_socket_init(void)
> +{
> + memset(socket_client_hash, 0, sizeof(socket_client_hash));
> +}
> +
> +static int bat_socket_open(struct inode *inode, struct file *file)
> +{
> + unsigned int i;
> + struct socket_client *socket_client;
> +
> + socket_client = kmalloc(sizeof(struct socket_client), GFP_KERNEL);
> +
> + if (!socket_client)
> + return -ENOMEM;
> +
> + for (i = 0; i < ARRAY_SIZE(socket_client_hash); i++) {
> + if (!socket_client_hash[i]) {
> + socket_client_hash[i] = socket_client;
> + break;
> + }
> + }
> +
> + if (i == ARRAY_SIZE(socket_client_hash)) {
> + pr_err("Error - can't add another packet client: "
> + "maximum number of clients reached\n");
> + kfree(socket_client);
> + return -EXFULL;
> + }
> +
> + INIT_LIST_HEAD(&socket_client->queue_list);
> + socket_client->queue_len = 0;
> + socket_client->index = i;
> + socket_client->bat_priv = inode->i_private;
> + spin_lock_init(&socket_client->lock);
> + init_waitqueue_head(&socket_client->queue_wait);
> +
> + file->private_data = socket_client;
> +
> + inc_module_count();
> + return 0;
> +}
> +
> +static int bat_socket_release(struct inode *inode, struct file *file)
> +{
> + struct socket_client *socket_client = file->private_data;
> + struct socket_packet *socket_packet;
> + struct list_head *list_pos, *list_pos_tmp;
> + unsigned long flags;
> +
> + spin_lock_irqsave(&socket_client->lock, flags);
> +
> + /* for all packets in the queue ... */
> + list_for_each_safe(list_pos, list_pos_tmp, &socket_client->queue_list) {
> + socket_packet = list_entry(list_pos,
> + struct socket_packet, list);
> +
> + list_del(list_pos);
> + kfree(socket_packet);
> + }
> +
> + socket_client_hash[socket_client->index] = NULL;
> + spin_unlock_irqrestore(&socket_client->lock, flags);
> +
> + kfree(socket_client);
> + dec_module_count();
> +
> + return 0;
> +}
> +
> +static ssize_t bat_socket_read(struct file *file, char __user *buf,
> + size_t count, loff_t *ppos)
> +{
> + struct socket_client *socket_client = file->private_data;
> + struct socket_packet *socket_packet;
> + size_t packet_len;
> + int error;
> + unsigned long flags;
> +
> + if ((file->f_flags & O_NONBLOCK) && (socket_client->queue_len == 0))
> + return -EAGAIN;
> +
> + if ((!buf) || (count < sizeof(struct icmp_packet)))
> + return -EINVAL;
> +
> + if (!access_ok(VERIFY_WRITE, buf, count))
> + return -EFAULT;
> +
> + error = wait_event_interruptible(socket_client->queue_wait,
> + socket_client->queue_len);
> +
> + if (error)
> + return error;
> +
> + spin_lock_irqsave(&socket_client->lock, flags);
> +
> + socket_packet = list_first_entry(&socket_client->queue_list,
> + struct socket_packet, list);
> + list_del(&socket_packet->list);
> + socket_client->queue_len--;
> +
> + spin_unlock_irqrestore(&socket_client->lock, flags);
> +
> + error = __copy_to_user(buf, &socket_packet->icmp_packet,
> + socket_packet->icmp_len);
> +
> + packet_len = socket_packet->icmp_len;
> + kfree(socket_packet);
> +
> + if (error)
> + return -EFAULT;
> +
> + return packet_len;
> +}
> +
> +static ssize_t bat_socket_write(struct file *file, const char __user *buff,
> + size_t len, loff_t *off)
> +{
> + struct socket_client *socket_client = file->private_data;
> + struct bat_priv *bat_priv = socket_client->bat_priv;
> + struct sk_buff *skb;
> + struct icmp_packet_rr *icmp_packet;
> +
> + struct orig_node *orig_node;
> + struct batman_if *batman_if;
> + size_t packet_len = sizeof(struct icmp_packet);
> + uint8_t dstaddr[ETH_ALEN];
> + unsigned long flags;
> +
> + if (len < sizeof(struct icmp_packet)) {
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "Error - can't send packet from char device: "
> + "invalid packet size\n");
> + return -EINVAL;
> + }
> +
> + if (!bat_priv->primary_if)
> + return -EFAULT;
> +
> + if (len >= sizeof(struct icmp_packet_rr))
> + packet_len = sizeof(struct icmp_packet_rr);
> +
> + skb = dev_alloc_skb(packet_len + sizeof(struct ethhdr));
> + if (!skb)
> + return -ENOMEM;
> +
> + skb_reserve(skb, sizeof(struct ethhdr));
> + icmp_packet = (struct icmp_packet_rr *)skb_put(skb, packet_len);
> +
> + if (!access_ok(VERIFY_READ, buff, packet_len)) {
> + len = -EFAULT;
> + goto free_skb;
> + }
> +
> + if (__copy_from_user(icmp_packet, buff, packet_len)) {
> + len = -EFAULT;
> + goto free_skb;
> + }
> +
> + if (icmp_packet->packet_type != BAT_ICMP) {
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "Error - can't send packet from char device: "
> + "got bogus packet type (expected: BAT_ICMP)\n");
> + len = -EINVAL;
> + goto free_skb;
> + }
> +
> + if (icmp_packet->msg_type != ECHO_REQUEST) {
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "Error - can't send packet from char device: "
> + "got bogus message type (expected: ECHO_REQUEST)\n");
> + len = -EINVAL;
> + goto free_skb;
> + }
> +
> + icmp_packet->uid = socket_client->index;
> +
> + if (icmp_packet->version != COMPAT_VERSION) {
> + icmp_packet->msg_type = PARAMETER_PROBLEM;
> + icmp_packet->ttl = COMPAT_VERSION;
> + bat_socket_add_packet(socket_client, icmp_packet, packet_len);
> + goto free_skb;
> + }
> +
> + if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE)
> + goto dst_unreach;
> +
> + spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
> + orig_node = ((struct orig_node *)hash_find(bat_priv->orig_hash,
> + icmp_packet->dst));
> +
> + if (!orig_node)
> + goto unlock;
> +
> + if (!orig_node->router)
> + goto unlock;
> +
> + batman_if = orig_node->router->if_incoming;
> + memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
> +
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> +
> + if (!batman_if)
> + goto dst_unreach;
> +
> + if (batman_if->if_status != IF_ACTIVE)
> + goto dst_unreach;
> +
> + memcpy(icmp_packet->orig,
> + bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
> +
> + if (packet_len == sizeof(struct icmp_packet_rr))
> + memcpy(icmp_packet->rr, batman_if->net_dev->dev_addr, ETH_ALEN);
> +
> +
> + send_skb_packet(skb, batman_if, dstaddr);
> +
> + goto out;
> +
> +unlock:
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> +dst_unreach:
> + icmp_packet->msg_type = DESTINATION_UNREACHABLE;
> + bat_socket_add_packet(socket_client, icmp_packet, packet_len);
> +free_skb:
> + kfree_skb(skb);
> +out:
> + return len;
> +}
> +
> +static unsigned int bat_socket_poll(struct file *file, poll_table *wait)
> +{
> + struct socket_client *socket_client = file->private_data;
> +
> + poll_wait(file, &socket_client->queue_wait, wait);
> +
> + if (socket_client->queue_len > 0)
> + return POLLIN | POLLRDNORM;
> +
> + return 0;
> +}
> +
> +static const struct file_operations fops = {
> + .owner = THIS_MODULE,
> + .open = bat_socket_open,
> + .release = bat_socket_release,
> + .read = bat_socket_read,
> + .write = bat_socket_write,
> + .poll = bat_socket_poll,
> +};
> +
> +int bat_socket_setup(struct bat_priv *bat_priv)
> +{
> + struct dentry *d;
> +
> + if (!bat_priv->debug_dir)
> + goto err;
> +
> + d = debugfs_create_file(ICMP_SOCKET, S_IFREG | S_IWUSR | S_IRUSR,
> + bat_priv->debug_dir, bat_priv, &fops);
> + if (d)
> + goto err;
> +
> + return 0;
> +
> +err:
> + return 1;
> +}
> +
> +static void bat_socket_add_packet(struct socket_client *socket_client,
> + struct icmp_packet_rr *icmp_packet,
> + size_t icmp_len)
> +{
> + struct socket_packet *socket_packet;
> + unsigned long flags;
> +
> + socket_packet = kmalloc(sizeof(struct socket_packet), GFP_ATOMIC);
> +
> + if (!socket_packet)
> + return;
> +
> + INIT_LIST_HEAD(&socket_packet->list);
> + memcpy(&socket_packet->icmp_packet, icmp_packet, icmp_len);
> + socket_packet->icmp_len = icmp_len;
> +
> + spin_lock_irqsave(&socket_client->lock, flags);
> +
> + /* while waiting for the lock the socket_client could have been
> + * deleted */
> + if (!socket_client_hash[icmp_packet->uid]) {
> + spin_unlock_irqrestore(&socket_client->lock, flags);
> + kfree(socket_packet);
> + return;
> + }
> +
> + list_add_tail(&socket_packet->list, &socket_client->queue_list);
> + socket_client->queue_len++;
> +
> + if (socket_client->queue_len > 100) {
> + socket_packet = list_first_entry(&socket_client->queue_list,
> + struct socket_packet, list);
> +
> + list_del(&socket_packet->list);
> + kfree(socket_packet);
> + socket_client->queue_len--;
> + }
> +
> + spin_unlock_irqrestore(&socket_client->lock, flags);
> +
> + wake_up(&socket_client->queue_wait);
> +}
> +
> +void bat_socket_receive_packet(struct icmp_packet_rr *icmp_packet,
> + size_t icmp_len)
> +{
> + struct socket_client *hash = socket_client_hash[icmp_packet->uid];
> +
> + if (hash)
> + bat_socket_add_packet(hash, icmp_packet, icmp_len);
> +}
> diff --git a/net/batman-adv/icmp_socket.h b/net/batman-adv/icmp_socket.h
> new file mode 100644
> index 0000000..bf9b348
> --- /dev/null
> +++ b/net/batman-adv/icmp_socket.h
> @@ -0,0 +1,34 @@
> +/*
> + * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#ifndef _NET_BATMAN_ADV_ICMP_SOCKET_H_
> +#define _NET_BATMAN_ADV_ICMP_SOCKET_H_
> +
> +#include "types.h"
> +
> +#define ICMP_SOCKET "socket"
> +
> +void bat_socket_init(void);
> +int bat_socket_setup(struct bat_priv *bat_priv);
> +void bat_socket_receive_packet(struct icmp_packet_rr *icmp_packet,
> + size_t icmp_len);
> +
> +#endif /* _NET_BATMAN_ADV_ICMP_SOCKET_H_ */
> diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
> new file mode 100644
> index 0000000..498861f
> --- /dev/null
> +++ b/net/batman-adv/main.c
> @@ -0,0 +1,225 @@
> +/*
> + * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner, Simon Wunderlich
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#include "main.h"
> +#include "bat_sysfs.h"
> +#include "bat_debugfs.h"
> +#include "routing.h"
> +#include "send.h"
> +#include "originator.h"
> +#include "soft-interface.h"
> +#include "icmp_socket.h"
> +#include "translation-table.h"
> +#include "hard-interface.h"
> +#include "types.h"
> +#include "vis.h"
> +#include "hash.h"
> +
> +struct list_head if_list;
> +
> +unsigned char broadcast_addr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
> +
> +struct workqueue_struct *bat_event_workqueue;
> +
> +static int __init batman_init(void)
> +{
> + INIT_LIST_HEAD(&if_list);
> +
> + /* the name should not be longer than 10 chars - see
> + * http://lwn.net/Articles/23634/ */
> + bat_event_workqueue = create_singlethread_workqueue("bat_events");
> +
> + if (!bat_event_workqueue)
> + return -ENOMEM;
> +
> + bat_socket_init();
> + debugfs_init();
> +
> + register_netdevice_notifier(&hard_if_notifier);
> +
> + pr_info("B.A.T.M.A.N. advanced %s%s (compatibility version %i) "
> + "loaded\n", SOURCE_VERSION, REVISION_VERSION_STR,
> + COMPAT_VERSION);
> +
> + return 0;
> +}
> +
> +static void __exit batman_exit(void)
> +{
> + debugfs_destroy();
> + unregister_netdevice_notifier(&hard_if_notifier);
> + hardif_remove_interfaces();
> +
> + flush_workqueue(bat_event_workqueue);
> + destroy_workqueue(bat_event_workqueue);
> + bat_event_workqueue = NULL;
> +}
> +
> +int mesh_init(struct net_device *soft_iface)
> +{
> + struct bat_priv *bat_priv = netdev_priv(soft_iface);
> +
> + spin_lock_init(&bat_priv->orig_hash_lock);
> + spin_lock_init(&bat_priv->forw_bat_list_lock);
> + spin_lock_init(&bat_priv->forw_bcast_list_lock);
> + spin_lock_init(&bat_priv->hna_lhash_lock);
> + spin_lock_init(&bat_priv->hna_ghash_lock);
> + spin_lock_init(&bat_priv->gw_list_lock);
> + spin_lock_init(&bat_priv->vis_hash_lock);
> + spin_lock_init(&bat_priv->vis_list_lock);
> +
> + INIT_HLIST_HEAD(&bat_priv->forw_bat_list);
> + INIT_HLIST_HEAD(&bat_priv->forw_bcast_list);
> + INIT_HLIST_HEAD(&bat_priv->gw_list);
> +
> + if (originator_init(bat_priv) < 1)
> + goto err;
> +
> + if (hna_local_init(bat_priv) < 1)
> + goto err;
> +
> + if (hna_global_init(bat_priv) < 1)
> + goto err;
> +
> + hna_local_add(soft_iface, soft_iface->dev_addr);
> +
> + if (vis_init(bat_priv) < 1)
> + goto err;
> +
> + atomic_set(&bat_priv->mesh_state, MESH_ACTIVE);
> + goto end;
> +
> +err:
> + pr_err("Unable to allocate memory for mesh information structures: "
> + "out of mem ?\n");
> + mesh_free(soft_iface);
> + return -1;
> +
> +end:
> + return 0;
> +}
> +
> +void mesh_free(struct net_device *soft_iface)
> +{
> + struct bat_priv *bat_priv = netdev_priv(soft_iface);
> +
> + atomic_set(&bat_priv->mesh_state, MESH_DEACTIVATING);
> +
> + purge_outstanding_packets(bat_priv, NULL);
> +
> + vis_quit(bat_priv);
> +
> + originator_free(bat_priv);
> +
> + hna_local_free(bat_priv);
> + hna_global_free(bat_priv);
> +
> + synchronize_net();
> +
> + synchronize_rcu();
> + atomic_set(&bat_priv->mesh_state, MESH_INACTIVE);
> +}
> +
> +void inc_module_count(void)
> +{
> + try_module_get(THIS_MODULE);
> +}
> +
> +void dec_module_count(void)
> +{
> + module_put(THIS_MODULE);
> +}
> +
> +int addr_to_string(char *buff, uint8_t *addr)
> +{
> + return sprintf(buff, "%pM", addr);
> +}
> +
> +/* returns 1 if they are the same originator */
> +
> +int compare_orig(void *data1, void *data2)
> +{
> + return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0);
> +}
> +
> +/* hashfunction to choose an entry in a hash table of given size */
> +/* hash algorithm from http://en.wikipedia.org/wiki/Hash_table */
> +int choose_orig(void *data, int32_t size)
> +{
> + unsigned char *key = data;
> + uint32_t hash = 0;
> + size_t i;
> +
> + for (i = 0; i < 6; i++) {
> + hash += key[i];
> + hash += (hash << 10);
> + hash ^= (hash >> 6);
> + }
> +
> + hash += (hash << 3);
> + hash ^= (hash >> 11);
> + hash += (hash << 15);
> +
> + return hash % size;
> +}
> +
> +int is_my_mac(uint8_t *addr)
> +{
> + struct batman_if *batman_if;
> +
> + rcu_read_lock();
> + list_for_each_entry_rcu(batman_if, &if_list, list) {
> + if (batman_if->if_status != IF_ACTIVE)
> + continue;
> +
> + if (compare_orig(batman_if->net_dev->dev_addr, addr)) {
> + rcu_read_unlock();
> + return 1;
> + }
> + }
> + rcu_read_unlock();
> + return 0;
> +
> +}
> +
> +int is_bcast(uint8_t *addr)
> +{
> + return (addr[0] == (uint8_t)0xff) && (addr[1] == (uint8_t)0xff);
> +}
> +
> +int is_mcast(uint8_t *addr)
> +{
> + return *addr & 0x01;
> +}
> +
> +module_init(batman_init);
> +module_exit(batman_exit);
> +
> +MODULE_LICENSE("GPL");
> +
> +MODULE_AUTHOR(DRIVER_AUTHOR);
> +MODULE_DESCRIPTION(DRIVER_DESC);
> +MODULE_SUPPORTED_DEVICE(DRIVER_DEVICE);
> +#ifdef REVISION_VERSION
> +MODULE_VERSION(SOURCE_VERSION "-" REVISION_VERSION);
> +#else
> +MODULE_VERSION(SOURCE_VERSION);
> +#endif
> diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h
> new file mode 100644
> index 0000000..ca97589
> --- /dev/null
> +++ b/net/batman-adv/main.h
> @@ -0,0 +1,185 @@
> +/*
> + * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner, Simon Wunderlich
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#ifndef _NET_BATMAN_ADV_MAIN_H_
> +#define _NET_BATMAN_ADV_MAIN_H_
> +
> +/* Kernel Programming */
> +#define LINUX
> +
> +#define DRIVER_AUTHOR "Marek Lindner <lindner_marek@...oo.de>, " \
> + "Simon Wunderlich <siwu@....tu-chemnitz.de>"
> +#define DRIVER_DESC "B.A.T.M.A.N. advanced"
> +#define DRIVER_DEVICE "batman-adv"
> +
> +#define SOURCE_VERSION "next"
> +
> +
> +/* B.A.T.M.A.N. parameters */
> +
> +#define TQ_MAX_VALUE 255
> +#define JITTER 20
> +#define TTL 50 /* Time To Live of broadcast messages */
> +
> +#define PURGE_TIMEOUT 200 /* purge originators after time in seconds if no
> + * valid packet comes in -> TODO: check
> + * influence on TQ_LOCAL_WINDOW_SIZE */
> +#define LOCAL_HNA_TIMEOUT 3600 /* in seconds */
> +
> +#define TQ_LOCAL_WINDOW_SIZE 64 /* sliding packet range of received originator
> + * messages in squence numbers (should be a
> + * multiple of our word size) */
> +#define TQ_GLOBAL_WINDOW_SIZE 5
> +#define TQ_LOCAL_BIDRECT_SEND_MINIMUM 1
> +#define TQ_LOCAL_BIDRECT_RECV_MINIMUM 1
> +#define TQ_TOTAL_BIDRECT_LIMIT 1
> +
> +#define TQ_HOP_PENALTY 10
> +
> +#define NUM_WORDS (TQ_LOCAL_WINDOW_SIZE / WORD_BIT_SIZE)
> +
> +#define PACKBUFF_SIZE 2000
> +#define LOG_BUF_LEN 8192 /* has to be a power of 2 */
> +#define ETH_STR_LEN 20
> +
> +#define VIS_INTERVAL 5000 /* 5 seconds */
> +
> +/* how much worse secondary interfaces may be to
> + * to be considered as bonding candidates */
> +
> +#define BONDING_TQ_THRESHOLD 50
> +
> +#define MAX_AGGREGATION_BYTES 512 /* should not be bigger than 512 bytes or
> + * change the size of
> + * forw_packet->direct_link_flags */
> +#define MAX_AGGREGATION_MS 100
> +
> +#define RESET_PROTECTION_MS 30000
> +#define EXPECTED_SEQNO_RANGE 65536
> +/* don't reset again within 30 seconds */
> +
> +#define MESH_INACTIVE 0
> +#define MESH_ACTIVE 1
> +#define MESH_DEACTIVATING 2
> +
> +#define BCAST_QUEUE_LEN 256
> +#define BATMAN_QUEUE_LEN 256
> +
> +/*
> + * Debug Messages
> + */
> +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt /* Append 'batman-adv: ' before
> + * kernel messages */
> +
> +#define DBG_BATMAN 1 /* all messages related to routing / flooding /
> + * broadcasting / etc */
> +#define DBG_ROUTES 2 /* route or hna added / changed / deleted */
> +#define DBG_ALL 3
> +
> +#define LOG_BUF_LEN 8192 /* has to be a power of 2 */
> +
> +
> +/*
> + * Vis
> + */
> +
> +/* #define VIS_SUBCLUSTERS_DISABLED */
> +
> +/*
> + * Kernel headers
> + */
> +
> +#include <linux/mutex.h> /* mutex */
> +#include <linux/module.h> /* needed by all modules */
> +#include <linux/netdevice.h> /* netdevice */
> +#include <linux/if_ether.h> /* ethernet header */
> +#include <linux/poll.h> /* poll_table */
> +#include <linux/kthread.h> /* kernel threads */
> +#include <linux/pkt_sched.h> /* schedule types */
> +#include <linux/workqueue.h> /* workqueue */
> +#include <linux/slab.h>
> +#include <net/sock.h> /* struct sock */
> +#include <linux/jiffies.h>
> +#include <linux/seq_file.h>
> +#include "types.h"
> +
> +#ifndef REVISION_VERSION
> +#define REVISION_VERSION_STR ""
> +#else
> +#define REVISION_VERSION_STR " "REVISION_VERSION
> +#endif
> +
> +extern struct list_head if_list;
> +
> +extern unsigned char broadcast_addr[];
> +extern struct workqueue_struct *bat_event_workqueue;
> +
> +int mesh_init(struct net_device *soft_iface);
> +void mesh_free(struct net_device *soft_iface);
> +void inc_module_count(void);
> +void dec_module_count(void);
> +int addr_to_string(char *buff, uint8_t *addr);
> +int compare_orig(void *data1, void *data2);
> +int choose_orig(void *data, int32_t size);
> +int is_my_mac(uint8_t *addr);
> +int is_bcast(uint8_t *addr);
> +int is_mcast(uint8_t *addr);
> +
> +#ifdef CONFIG_BATMAN_ADV_DEBUG
> +int debug_log(struct bat_priv *bat_priv, char *fmt, ...);
> +
> +#define bat_dbg(type, bat_priv, fmt, arg...) \
> + do { \
> + if (atomic_read(&bat_priv->log_level) & type) \
> + debug_log(bat_priv, fmt, ## arg); \
> + } \
> + while (0)
> +#else /* !CONFIG_BATMAN_ADV_DEBUG */
> +static inline void bat_dbg(char type __attribute__((unused)),
> + struct bat_priv *bat_priv __attribute__((unused)),
> + char *fmt __attribute__((unused)), ...)
> +{
> +}
> +#endif
> +
> +#define bat_warning(net_dev, fmt, arg...) \
> + do { \
> + struct net_device *_netdev = (net_dev); \
> + struct bat_priv *_batpriv = netdev_priv(_netdev); \
> + bat_dbg(DBG_ALL, _batpriv, fmt, ## arg); \
> + pr_warning("%s: " fmt, _netdev->name, ## arg); \
> + } while (0)
> +#define bat_info(net_dev, fmt, arg...) \
> + do { \
> + struct net_device *_netdev = (net_dev); \
> + struct bat_priv *_batpriv = netdev_priv(_netdev); \
> + bat_dbg(DBG_ALL, _batpriv, fmt, ## arg); \
> + pr_info("%s: " fmt, _netdev->name, ## arg); \
> + } while (0)
> +#define bat_err(net_dev, fmt, arg...) \
> + do { \
> + struct net_device *_netdev = (net_dev); \
> + struct bat_priv *_batpriv = netdev_priv(_netdev); \
> + bat_dbg(DBG_ALL, _batpriv, fmt, ## arg); \
> + pr_err("%s: " fmt, _netdev->name, ## arg); \
> + } while (0)
> +
> +#endif /* _NET_BATMAN_ADV_MAIN_H_ */
> diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c
> new file mode 100644
> index 0000000..f25d7fd
> --- /dev/null
> +++ b/net/batman-adv/originator.c
> @@ -0,0 +1,539 @@
> +/*
> + * Copyright (C) 2009-2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner, Simon Wunderlich
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +/* increase the reference counter for this originator */
> +
> +#include "main.h"
> +#include "originator.h"
> +#include "hash.h"
> +#include "translation-table.h"
> +#include "routing.h"
> +#include "hard-interface.h"
> +#include "unicast.h"
> +
> +static void purge_orig(struct work_struct *work);
> +
> +static void start_purge_timer(struct bat_priv *bat_priv)
> +{
> + INIT_DELAYED_WORK(&bat_priv->orig_work, purge_orig);
> + queue_delayed_work(bat_event_workqueue, &bat_priv->orig_work, 1 * HZ);
> +}
> +
> +int originator_init(struct bat_priv *bat_priv)
> +{
> + unsigned long flags;
> + if (bat_priv->orig_hash)
> + return 1;
> +
> + spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
> + bat_priv->orig_hash = hash_new(128, compare_orig, choose_orig);
> +
> + if (!bat_priv->orig_hash)
> + goto err;
> +
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> + start_purge_timer(bat_priv);
> + return 1;
> +
> +err:
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> + return 0;
> +}
> +
> +struct neigh_node *
> +create_neighbor(struct orig_node *orig_node, struct orig_node *orig_neigh_node,
> + uint8_t *neigh, struct batman_if *if_incoming)
> +{
> + struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
> + struct neigh_node *neigh_node;
> +
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "Creating new last-hop neighbor of originator\n");
> +
> + neigh_node = kzalloc(sizeof(struct neigh_node), GFP_ATOMIC);
> + if (!neigh_node)
> + return NULL;
> +
> + INIT_LIST_HEAD(&neigh_node->list);
> +
> + memcpy(neigh_node->addr, neigh, ETH_ALEN);
> + neigh_node->orig_node = orig_neigh_node;
> + neigh_node->if_incoming = if_incoming;
> +
> + list_add_tail(&neigh_node->list, &orig_node->neigh_list);
> + return neigh_node;
> +}
> +
> +static void free_orig_node(void *data, void *arg)
> +{
> + struct list_head *list_pos, *list_pos_tmp;
> + struct neigh_node *neigh_node;
> + struct orig_node *orig_node = (struct orig_node *)data;
> + struct bat_priv *bat_priv = (struct bat_priv *)arg;
> +
> + /* for all neighbors towards this originator ... */
> + list_for_each_safe(list_pos, list_pos_tmp, &orig_node->neigh_list) {
> + neigh_node = list_entry(list_pos, struct neigh_node, list);
> +
> + list_del(list_pos);
> + kfree(neigh_node);
> + }
> +
> + frag_list_free(&orig_node->frag_list);
> + hna_global_del_orig(bat_priv, orig_node, "originator timed out");
> +
> + kfree(orig_node->bcast_own);
> + kfree(orig_node->bcast_own_sum);
> + kfree(orig_node);
> +}
> +
> +void originator_free(struct bat_priv *bat_priv)
> +{
> + unsigned long flags;
> +
> + if (!bat_priv->orig_hash)
> + return;
> +
> + cancel_delayed_work_sync(&bat_priv->orig_work);
> +
> + spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
> + hash_delete(bat_priv->orig_hash, free_orig_node, bat_priv);
> + bat_priv->orig_hash = NULL;
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> +}
> +
> +/* this function finds or creates an originator entry for the given
> + * address if it does not exits */
> +struct orig_node *get_orig_node(struct bat_priv *bat_priv, uint8_t *addr)
> +{
> + struct orig_node *orig_node;
> + struct hashtable_t *swaphash;
> + int size;
> +
> + orig_node = ((struct orig_node *)hash_find(bat_priv->orig_hash, addr));
> +
> + if (orig_node)
> + return orig_node;
> +
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "Creating new originator: %pM\n", addr);
> +
> + orig_node = kzalloc(sizeof(struct orig_node), GFP_ATOMIC);
> + if (!orig_node)
> + return NULL;
> +
> + INIT_LIST_HEAD(&orig_node->neigh_list);
> +
> + memcpy(orig_node->orig, addr, ETH_ALEN);
> + orig_node->router = NULL;
> + orig_node->hna_buff = NULL;
> + orig_node->bcast_seqno_reset = jiffies - 1
> + - msecs_to_jiffies(RESET_PROTECTION_MS);
> + orig_node->batman_seqno_reset = jiffies - 1
> + - msecs_to_jiffies(RESET_PROTECTION_MS);
> +
> + size = bat_priv->num_ifaces * sizeof(TYPE_OF_WORD) * NUM_WORDS;
> +
> + orig_node->bcast_own = kzalloc(size, GFP_ATOMIC);
> + if (!orig_node->bcast_own)
> + goto free_orig_node;
> +
> + size = bat_priv->num_ifaces * sizeof(uint8_t);
> + orig_node->bcast_own_sum = kzalloc(size, GFP_ATOMIC);
> +
> + INIT_LIST_HEAD(&orig_node->frag_list);
> + orig_node->last_frag_packet = 0;
> +
> + if (!orig_node->bcast_own_sum)
> + goto free_bcast_own;
> +
> + if (hash_add(bat_priv->orig_hash, orig_node) < 0)
> + goto free_bcast_own_sum;
> +
> + if (bat_priv->orig_hash->elements * 4 > bat_priv->orig_hash->size) {
> + swaphash = hash_resize(bat_priv->orig_hash,
> + bat_priv->orig_hash->size * 2);
> +
> + if (!swaphash)
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "Couldn't resize orig hash table\n");
> + else
> + bat_priv->orig_hash = swaphash;
> + }
> +
> + return orig_node;
> +free_bcast_own_sum:
> + kfree(orig_node->bcast_own_sum);
> +free_bcast_own:
> + kfree(orig_node->bcast_own);
> +free_orig_node:
> + kfree(orig_node);
> + return NULL;
> +}
> +
> +static bool purge_orig_neighbors(struct bat_priv *bat_priv,
> + struct orig_node *orig_node,
> + struct neigh_node **best_neigh_node)
> +{
> + struct list_head *list_pos, *list_pos_tmp;
> + struct neigh_node *neigh_node;
> + bool neigh_purged = false;
> +
> + *best_neigh_node = NULL;
> +
> + /* for all neighbors towards this originator ... */
> + list_for_each_safe(list_pos, list_pos_tmp, &orig_node->neigh_list) {
> + neigh_node = list_entry(list_pos, struct neigh_node, list);
> +
> + if ((time_after(jiffies,
> + neigh_node->last_valid + PURGE_TIMEOUT * HZ)) ||
> + (neigh_node->if_incoming->if_status == IF_INACTIVE) ||
> + (neigh_node->if_incoming->if_status == IF_TO_BE_REMOVED)) {
> +
> + if (neigh_node->if_incoming->if_status ==
> + IF_TO_BE_REMOVED)
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "neighbor purge: originator %pM, "
> + "neighbor: %pM, iface: %s\n",
> + orig_node->orig, neigh_node->addr,
> + neigh_node->if_incoming->net_dev->name);
> + else
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "neighbor timeout: originator %pM, "
> + "neighbor: %pM, last_valid: %lu\n",
> + orig_node->orig, neigh_node->addr,
> + (neigh_node->last_valid / HZ));
> +
> + neigh_purged = true;
> + list_del(list_pos);
> + kfree(neigh_node);
> + } else {
> + if ((*best_neigh_node == NULL) ||
> + (neigh_node->tq_avg > (*best_neigh_node)->tq_avg))
> + *best_neigh_node = neigh_node;
> + }
> + }
> + return neigh_purged;
> +}
> +
> +static bool purge_orig_node(struct bat_priv *bat_priv,
> + struct orig_node *orig_node)
> +{
> + struct neigh_node *best_neigh_node;
> +
> + if (time_after(jiffies,
> + orig_node->last_valid + 2 * PURGE_TIMEOUT * HZ)) {
> +
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "Originator timeout: originator %pM, last_valid %lu\n",
> + orig_node->orig, (orig_node->last_valid / HZ));
> + return true;
> + } else {
> + if (purge_orig_neighbors(bat_priv, orig_node,
> + &best_neigh_node)) {
> + update_routes(bat_priv, orig_node,
> + best_neigh_node,
> + orig_node->hna_buff,
> + orig_node->hna_buff_len);
> + /* update bonding candidates, we could have lost
> + * some candidates. */
> + update_bonding_candidates(bat_priv, orig_node);
> + }
> + }
> +
> + return false;
> +}
> +
> +static void _purge_orig(struct bat_priv *bat_priv)
> +{
> + HASHIT(hashit);
> + struct orig_node *orig_node;
> + unsigned long flags;
> +
> + spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
> +
> + /* for all origins... */
> + while (hash_iterate(bat_priv->orig_hash, &hashit)) {
> + orig_node = hashit.bucket->data;
> +
> + if (purge_orig_node(bat_priv, orig_node)) {
> + hash_remove_bucket(bat_priv->orig_hash, &hashit);
> + free_orig_node(orig_node, bat_priv);
> + }
> +
> + if (time_after(jiffies, (orig_node->last_frag_packet +
> + msecs_to_jiffies(FRAG_TIMEOUT))))
> + frag_list_free(&orig_node->frag_list);
> + }
> +
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> +
> +}
> +
> +static void purge_orig(struct work_struct *work)
> +{
> + struct delayed_work *delayed_work =
> + container_of(work, struct delayed_work, work);
> + struct bat_priv *bat_priv =
> + container_of(delayed_work, struct bat_priv, orig_work);
> +
> + _purge_orig(bat_priv);
> + start_purge_timer(bat_priv);
> +}
> +
> +void purge_orig_ref(struct bat_priv *bat_priv)
> +{
> + _purge_orig(bat_priv);
> +}
> +
> +int orig_seq_print_text(struct seq_file *seq, void *offset)
> +{
> + HASHIT(hashit);
> + struct net_device *net_dev = (struct net_device *)seq->private;
> + struct bat_priv *bat_priv = netdev_priv(net_dev);
> + struct orig_node *orig_node;
> + struct neigh_node *neigh_node;
> + int batman_count = 0;
> + int last_seen_secs;
> + int last_seen_msecs;
> + unsigned long flags;
> + char orig_str[ETH_STR_LEN], router_str[ETH_STR_LEN];
> +
> + if ((!bat_priv->primary_if) ||
> + (bat_priv->primary_if->if_status != IF_ACTIVE)) {
> + if (!bat_priv->primary_if)
> + return seq_printf(seq, "BATMAN mesh %s disabled - "
> + "please specify interfaces to enable it\n",
> + net_dev->name);
> +
> + return seq_printf(seq, "BATMAN mesh %s "
> + "disabled - primary interface not active\n",
> + net_dev->name);
> + }
> +
> + rcu_read_lock();
> + seq_printf(seq, "[B.A.T.M.A.N. adv %s%s, MainIF/MAC: %s/%s (%s)]\n",
> + SOURCE_VERSION, REVISION_VERSION_STR,
> + bat_priv->primary_if->net_dev->name,
> + bat_priv->primary_if->addr_str, net_dev->name);
> + seq_printf(seq, " %-15s %s (%s/%i) %17s [%10s]: %20s ...\n",
> + "Originator", "last-seen", "#", TQ_MAX_VALUE, "Nexthop",
> + "outgoingIF", "Potential nexthops");
> + rcu_read_unlock();
> +
> + spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
> +
> + while (hash_iterate(bat_priv->orig_hash, &hashit)) {
> +
> + orig_node = hashit.bucket->data;
> +
> + if (!orig_node->router)
> + continue;
> +
> + if (orig_node->router->tq_avg == 0)
> + continue;
> +
> + addr_to_string(orig_str, orig_node->orig);
> + addr_to_string(router_str, orig_node->router->addr);
> + last_seen_secs = jiffies_to_msecs(jiffies -
> + orig_node->last_valid) / 1000;
> + last_seen_msecs = jiffies_to_msecs(jiffies -
> + orig_node->last_valid) % 1000;
> +
> + seq_printf(seq, "%-17s %4i.%03is (%3i) %17s [%10s]:",
> + orig_str, last_seen_secs, last_seen_msecs,
> + orig_node->router->tq_avg, router_str,
> + orig_node->router->if_incoming->net_dev->name);
> +
> + list_for_each_entry(neigh_node, &orig_node->neigh_list, list) {
> + addr_to_string(orig_str, neigh_node->addr);
> + seq_printf(seq, " %17s (%3i)", orig_str,
> + neigh_node->tq_avg);
> + }
> +
> + seq_printf(seq, "\n");
> + batman_count++;
> + }
> +
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> +
> + if ((batman_count == 0))
> + seq_printf(seq, "No batman nodes in range ...\n");
> +
> + return 0;
> +}
> +
> +static int orig_node_add_if(struct orig_node *orig_node, int max_if_num)
> +{
> + void *data_ptr;
> +
> + data_ptr = kmalloc(max_if_num * sizeof(TYPE_OF_WORD) * NUM_WORDS,
> + GFP_ATOMIC);
> + if (!data_ptr) {
> + pr_err("Can't resize orig: out of memory\n");
> + return -1;
> + }
> +
> + memcpy(data_ptr, orig_node->bcast_own,
> + (max_if_num - 1) * sizeof(TYPE_OF_WORD) * NUM_WORDS);
> + kfree(orig_node->bcast_own);
> + orig_node->bcast_own = data_ptr;
> +
> + data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
> + if (!data_ptr) {
> + pr_err("Can't resize orig: out of memory\n");
> + return -1;
> + }
> +
> + memcpy(data_ptr, orig_node->bcast_own_sum,
> + (max_if_num - 1) * sizeof(uint8_t));
> + kfree(orig_node->bcast_own_sum);
> + orig_node->bcast_own_sum = data_ptr;
> +
> + return 0;
> +}
> +
> +int orig_hash_add_if(struct batman_if *batman_if, int max_if_num)
> +{
> + struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
> + struct orig_node *orig_node;
> + unsigned long flags;
> + HASHIT(hashit);
> +
> + /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
> + * if_num */
> + spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
> +
> + while (hash_iterate(bat_priv->orig_hash, &hashit)) {
> + orig_node = hashit.bucket->data;
> +
> + if (orig_node_add_if(orig_node, max_if_num) == -1)
> + goto err;
> + }
> +
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> + return 0;
> +
> +err:
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> + return -ENOMEM;
> +}
> +
> +static int orig_node_del_if(struct orig_node *orig_node,
> + int max_if_num, int del_if_num)
> +{
> + void *data_ptr = NULL;
> + int chunk_size;
> +
> + /* last interface was removed */
> + if (max_if_num == 0)
> + goto free_bcast_own;
> +
> + chunk_size = sizeof(TYPE_OF_WORD) * NUM_WORDS;
> + data_ptr = kmalloc(max_if_num * chunk_size, GFP_ATOMIC);
> + if (!data_ptr) {
> + pr_err("Can't resize orig: out of memory\n");
> + return -1;
> + }
> +
> + /* copy first part */
> + memcpy(data_ptr, orig_node->bcast_own, del_if_num * chunk_size);
> +
> + /* copy second part */
> + memcpy(data_ptr,
> + orig_node->bcast_own + ((del_if_num + 1) * chunk_size),
> + (max_if_num - del_if_num) * chunk_size);
> +
> +free_bcast_own:
> + kfree(orig_node->bcast_own);
> + orig_node->bcast_own = data_ptr;
> +
> + if (max_if_num == 0)
> + goto free_own_sum;
> +
> + data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
> + if (!data_ptr) {
> + pr_err("Can't resize orig: out of memory\n");
> + return -1;
> + }
> +
> + memcpy(data_ptr, orig_node->bcast_own_sum,
> + del_if_num * sizeof(uint8_t));
> +
> + memcpy(data_ptr,
> + orig_node->bcast_own_sum + ((del_if_num + 1) * sizeof(uint8_t)),
> + (max_if_num - del_if_num) * sizeof(uint8_t));
> +
> +free_own_sum:
> + kfree(orig_node->bcast_own_sum);
> + orig_node->bcast_own_sum = data_ptr;
> +
> + return 0;
> +}
> +
> +int orig_hash_del_if(struct batman_if *batman_if, int max_if_num)
> +{
> + struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
> + struct batman_if *batman_if_tmp;
> + struct orig_node *orig_node;
> + unsigned long flags;
> + HASHIT(hashit);
> + int ret;
> +
> + /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
> + * if_num */
> + spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
> +
> + while (hash_iterate(bat_priv->orig_hash, &hashit)) {
> + orig_node = hashit.bucket->data;
> +
> + ret = orig_node_del_if(orig_node, max_if_num,
> + batman_if->if_num);
> +
> + if (ret == -1)
> + goto err;
> + }
> +
> + /* renumber remaining batman interfaces _inside_ of orig_hash_lock */
> + rcu_read_lock();
> + list_for_each_entry_rcu(batman_if_tmp, &if_list, list) {
> + if (batman_if_tmp->if_status == IF_NOT_IN_USE)
> + continue;
> +
> + if (batman_if == batman_if_tmp)
> + continue;
> +
> + if (batman_if->soft_iface != batman_if_tmp->soft_iface)
> + continue;
> +
> + if (batman_if_tmp->if_num > batman_if->if_num)
> + batman_if_tmp->if_num--;
> + }
> + rcu_read_unlock();
> +
> + batman_if->if_num = -1;
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> + return 0;
> +
> +err:
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> + return -ENOMEM;
> +}
> diff --git a/net/batman-adv/originator.h b/net/batman-adv/originator.h
> new file mode 100644
> index 0000000..a97c400
> --- /dev/null
> +++ b/net/batman-adv/originator.h
> @@ -0,0 +1,36 @@
> +/*
> + * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner, Simon Wunderlich
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#ifndef _NET_BATMAN_ADV_ORIGINATOR_H_
> +#define _NET_BATMAN_ADV_ORIGINATOR_H_
> +
> +int originator_init(struct bat_priv *bat_priv);
> +void originator_free(struct bat_priv *bat_priv);
> +void purge_orig_ref(struct bat_priv *bat_priv);
> +struct orig_node *get_orig_node(struct bat_priv *bat_priv, uint8_t *addr);
> +struct neigh_node *
> +create_neighbor(struct orig_node *orig_node, struct orig_node *orig_neigh_node,
> + uint8_t *neigh, struct batman_if *if_incoming);
> +int orig_seq_print_text(struct seq_file *seq, void *offset);
> +int orig_hash_add_if(struct batman_if *batman_if, int max_if_num);
> +int orig_hash_del_if(struct batman_if *batman_if, int max_if_num);
> +
> +#endif /* _NET_BATMAN_ADV_ORIGINATOR_H_ */
> diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h
> new file mode 100644
> index 0000000..44de1bf
> --- /dev/null
> +++ b/net/batman-adv/packet.h
> @@ -0,0 +1,134 @@
> +/*
> + * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner, Simon Wunderlich
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#ifndef _NET_BATMAN_ADV_PACKET_H_
> +#define _NET_BATMAN_ADV_PACKET_H_
> +
> +#define ETH_P_BATMAN 0x4305 /* unofficial/not registered Ethertype */
> +
> +#define BAT_PACKET 0x01
> +#define BAT_ICMP 0x02
> +#define BAT_UNICAST 0x03
> +#define BAT_BCAST 0x04
> +#define BAT_VIS 0x05
> +#define BAT_UNICAST_FRAG 0x06
> +
> +/* this file is included by batctl which needs these defines */
> +#define COMPAT_VERSION 13
> +#define DIRECTLINK 0x40
> +#define VIS_SERVER 0x20
> +#define PRIMARIES_FIRST_HOP 0x10
> +
> +/* ICMP message types */
> +#define ECHO_REPLY 0
> +#define DESTINATION_UNREACHABLE 3
> +#define ECHO_REQUEST 8
> +#define TTL_EXCEEDED 11
> +#define PARAMETER_PROBLEM 12
> +
> +/* vis defines */
> +#define VIS_TYPE_SERVER_SYNC 0
> +#define VIS_TYPE_CLIENT_UPDATE 1
> +
> +/* fragmentation defines */
> +#define UNI_FRAG_HEAD 0x01
> +
> +struct batman_packet {
> + uint8_t packet_type;
> + uint8_t version; /* batman version field */
> + uint8_t flags; /* 0x40: DIRECTLINK flag, 0x20 VIS_SERVER flag... */
> + uint8_t tq;
> + uint32_t seqno;
> + uint8_t orig[6];
> + uint8_t prev_sender[6];
> + uint8_t ttl;
> + uint8_t num_hna;
> +} __attribute__((packed));
> +
> +#define BAT_PACKET_LEN sizeof(struct batman_packet)
> +
> +struct icmp_packet {
> + uint8_t packet_type;
> + uint8_t version; /* batman version field */
> + uint8_t msg_type; /* see ICMP message types above */
> + uint8_t ttl;
> + uint8_t dst[6];
> + uint8_t orig[6];
> + uint16_t seqno;
> + uint8_t uid;
> +} __attribute__((packed));
> +
> +#define BAT_RR_LEN 16
> +
> +/* icmp_packet_rr must start with all fields from imcp_packet
> + as this is assumed by code that handles ICMP packets */
> +struct icmp_packet_rr {
> + uint8_t packet_type;
> + uint8_t version; /* batman version field */
> + uint8_t msg_type; /* see ICMP message types above */
> + uint8_t ttl;
> + uint8_t dst[6];
> + uint8_t orig[6];
> + uint16_t seqno;
> + uint8_t uid;
> + uint8_t rr_cur;
> + uint8_t rr[BAT_RR_LEN][ETH_ALEN];
> +} __attribute__((packed));
> +
> +struct unicast_packet {
> + uint8_t packet_type;
> + uint8_t version; /* batman version field */
> + uint8_t dest[6];
> + uint8_t ttl;
> +} __attribute__((packed));
> +
> +struct unicast_frag_packet {
> + uint8_t packet_type;
> + uint8_t version; /* batman version field */
> + uint8_t dest[6];
> + uint8_t ttl;
> + uint8_t flags;
> + uint8_t orig[6];
> + uint16_t seqno;
> +} __attribute__((packed));
> +
> +struct bcast_packet {
> + uint8_t packet_type;
> + uint8_t version; /* batman version field */
> + uint8_t orig[6];
> + uint8_t ttl;
> + uint32_t seqno;
> +} __attribute__((packed));
> +
> +struct vis_packet {
> + uint8_t packet_type;
> + uint8_t version; /* batman version field */
> + uint8_t vis_type; /* which type of vis-participant sent this? */
> + uint8_t entries; /* number of entries behind this struct */
> + uint32_t seqno; /* sequence number */
> + uint8_t ttl; /* TTL */
> + uint8_t vis_orig[6]; /* originator that informs about its
> + * neighbors */
> + uint8_t target_orig[6]; /* who should receive this packet */
> + uint8_t sender_orig[6]; /* who sent or rebroadcasted this packet */
> +} __attribute__((packed));
> +
> +#endif /* _NET_BATMAN_ADV_PACKET_H_ */
> diff --git a/net/batman-adv/ring_buffer.c b/net/batman-adv/ring_buffer.c
> new file mode 100644
> index 0000000..defd37c
> --- /dev/null
> +++ b/net/batman-adv/ring_buffer.c
> @@ -0,0 +1,52 @@
> +/*
> + * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#include "main.h"
> +#include "ring_buffer.h"
> +
> +void ring_buffer_set(uint8_t lq_recv[], uint8_t *lq_index, uint8_t value)
> +{
> + lq_recv[*lq_index] = value;
> + *lq_index = (*lq_index + 1) % TQ_GLOBAL_WINDOW_SIZE;
> +}
> +
> +uint8_t ring_buffer_avg(uint8_t lq_recv[])
> +{
> + uint8_t *ptr;
> + uint16_t count = 0, i = 0, sum = 0;
> +
> + ptr = lq_recv;
> +
> + while (i < TQ_GLOBAL_WINDOW_SIZE) {
> + if (*ptr != 0) {
> + count++;
> + sum += *ptr;
> + }
> +
> + i++;
> + ptr++;
> + }
> +
> + if (count == 0)
> + return 0;
> +
> + return (uint8_t)(sum / count);
> +}
> diff --git a/net/batman-adv/ring_buffer.h b/net/batman-adv/ring_buffer.h
> new file mode 100644
> index 0000000..6b0cb9a
> --- /dev/null
> +++ b/net/batman-adv/ring_buffer.h
> @@ -0,0 +1,28 @@
> +/*
> + * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#ifndef _NET_BATMAN_ADV_RING_BUFFER_H_
> +#define _NET_BATMAN_ADV_RING_BUFFER_H_
> +
> +void ring_buffer_set(uint8_t lq_recv[], uint8_t *lq_index, uint8_t value);
> +uint8_t ring_buffer_avg(uint8_t lq_recv[]);
> +
> +#endif /* _NET_BATMAN_ADV_RING_BUFFER_H_ */
> diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c
> new file mode 100644
> index 0000000..e12fd99
> --- /dev/null
> +++ b/net/batman-adv/routing.c
> @@ -0,0 +1,1387 @@
> +/*
> + * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner, Simon Wunderlich
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#include "main.h"
> +#include "routing.h"
> +#include "send.h"
> +#include "hash.h"
> +#include "soft-interface.h"
> +#include "hard-interface.h"
> +#include "icmp_socket.h"
> +#include "translation-table.h"
> +#include "originator.h"
> +#include "types.h"
> +#include "ring_buffer.h"
> +#include "vis.h"
> +#include "aggregation.h"
> +#include "unicast.h"
> +
> +void slide_own_bcast_window(struct batman_if *batman_if)
> +{
> + struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
> + HASHIT(hashit);
> + struct orig_node *orig_node;
> + TYPE_OF_WORD *word;
> + unsigned long flags;
> +
> + spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
> +
> + while (hash_iterate(bat_priv->orig_hash, &hashit)) {
> + orig_node = hashit.bucket->data;
> + word = &(orig_node->bcast_own[batman_if->if_num * NUM_WORDS]);
> +
> + bit_get_packet(bat_priv, word, 1, 0);
> + orig_node->bcast_own_sum[batman_if->if_num] =
> + bit_packet_count(word);
> + }
> +
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> +}
> +
> +static void update_HNA(struct bat_priv *bat_priv, struct orig_node *orig_node,
> + unsigned char *hna_buff, int hna_buff_len)
> +{
> + if ((hna_buff_len != orig_node->hna_buff_len) ||
> + ((hna_buff_len > 0) &&
> + (orig_node->hna_buff_len > 0) &&
> + (memcmp(orig_node->hna_buff, hna_buff, hna_buff_len) != 0))) {
> +
> + if (orig_node->hna_buff_len > 0)
> + hna_global_del_orig(bat_priv, orig_node,
> + "originator changed hna");
> +
> + if ((hna_buff_len > 0) && (hna_buff != NULL))
> + hna_global_add_orig(bat_priv, orig_node,
> + hna_buff, hna_buff_len);
> + }
> +}
> +
> +static void update_route(struct bat_priv *bat_priv,
> + struct orig_node *orig_node,
> + struct neigh_node *neigh_node,
> + unsigned char *hna_buff, int hna_buff_len)
> +{
> + /* route deleted */
> + if ((orig_node->router != NULL) && (neigh_node == NULL)) {
> +
> + bat_dbg(DBG_ROUTES, bat_priv, "Deleting route towards: %pM\n",
> + orig_node->orig);
> + hna_global_del_orig(bat_priv, orig_node,
> + "originator timed out");
> +
> + /* route added */
> + } else if ((orig_node->router == NULL) && (neigh_node != NULL)) {
> +
> + bat_dbg(DBG_ROUTES, bat_priv,
> + "Adding route towards: %pM (via %pM)\n",
> + orig_node->orig, neigh_node->addr);
> + hna_global_add_orig(bat_priv, orig_node,
> + hna_buff, hna_buff_len);
> +
> + /* route changed */
> + } else {
> + bat_dbg(DBG_ROUTES, bat_priv,
> + "Changing route towards: %pM "
> + "(now via %pM - was via %pM)\n",
> + orig_node->orig, neigh_node->addr,
> + orig_node->router->addr);
> + }
> +
> + orig_node->router = neigh_node;
> +}
> +
> +
> +void update_routes(struct bat_priv *bat_priv, struct orig_node *orig_node,
> + struct neigh_node *neigh_node, unsigned char *hna_buff,
> + int hna_buff_len)
> +{
> +
> + if (orig_node == NULL)
> + return;
> +
> + if (orig_node->router != neigh_node)
> + update_route(bat_priv, orig_node, neigh_node,
> + hna_buff, hna_buff_len);
> + /* may be just HNA changed */
> + else
> + update_HNA(bat_priv, orig_node, hna_buff, hna_buff_len);
> +}
> +
> +static int is_bidirectional_neigh(struct orig_node *orig_node,
> + struct orig_node *orig_neigh_node,
> + struct batman_packet *batman_packet,
> + struct batman_if *if_incoming)
> +{
> + struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
> + struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL;
> + unsigned char total_count;
> +
> + if (orig_node == orig_neigh_node) {
> + list_for_each_entry(tmp_neigh_node,
> + &orig_node->neigh_list,
> + list) {
> +
> + if (compare_orig(tmp_neigh_node->addr,
> + orig_neigh_node->orig) &&
> + (tmp_neigh_node->if_incoming == if_incoming))
> + neigh_node = tmp_neigh_node;
> + }
> +
> + if (!neigh_node)
> + neigh_node = create_neighbor(orig_node,
> + orig_neigh_node,
> + orig_neigh_node->orig,
> + if_incoming);
> + /* create_neighbor failed, return 0 */
> + if (!neigh_node)
> + return 0;
> +
> + neigh_node->last_valid = jiffies;
> + } else {
> + /* find packet count of corresponding one hop neighbor */
> + list_for_each_entry(tmp_neigh_node,
> + &orig_neigh_node->neigh_list, list) {
> +
> + if (compare_orig(tmp_neigh_node->addr,
> + orig_neigh_node->orig) &&
> + (tmp_neigh_node->if_incoming == if_incoming))
> + neigh_node = tmp_neigh_node;
> + }
> +
> + if (!neigh_node)
> + neigh_node = create_neighbor(orig_neigh_node,
> + orig_neigh_node,
> + orig_neigh_node->orig,
> + if_incoming);
> + /* create_neighbor failed, return 0 */
> + if (!neigh_node)
> + return 0;
> + }
> +
> + orig_node->last_valid = jiffies;
> +
> + /* pay attention to not get a value bigger than 100 % */
> + total_count = (orig_neigh_node->bcast_own_sum[if_incoming->if_num] >
> + neigh_node->real_packet_count ?
> + neigh_node->real_packet_count :
> + orig_neigh_node->bcast_own_sum[if_incoming->if_num]);
> +
> + /* if we have too few packets (too less data) we set tq_own to zero */
> + /* if we receive too few packets it is not considered bidirectional */
> + if ((total_count < TQ_LOCAL_BIDRECT_SEND_MINIMUM) ||
> + (neigh_node->real_packet_count < TQ_LOCAL_BIDRECT_RECV_MINIMUM))
> + orig_neigh_node->tq_own = 0;
> + else
> + /* neigh_node->real_packet_count is never zero as we
> + * only purge old information when getting new
> + * information */
> + orig_neigh_node->tq_own = (TQ_MAX_VALUE * total_count) /
> + neigh_node->real_packet_count;
> +
> + /*
> + * 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does
> + * affect the nearly-symmetric links only a little, but
> + * punishes asymmetric links more. This will give a value
> + * between 0 and TQ_MAX_VALUE
> + */
> + orig_neigh_node->tq_asym_penalty =
> + TQ_MAX_VALUE -
> + (TQ_MAX_VALUE *
> + (TQ_LOCAL_WINDOW_SIZE - neigh_node->real_packet_count) *
> + (TQ_LOCAL_WINDOW_SIZE - neigh_node->real_packet_count) *
> + (TQ_LOCAL_WINDOW_SIZE - neigh_node->real_packet_count)) /
> + (TQ_LOCAL_WINDOW_SIZE *
> + TQ_LOCAL_WINDOW_SIZE *
> + TQ_LOCAL_WINDOW_SIZE);
> +
> + batman_packet->tq = ((batman_packet->tq *
> + orig_neigh_node->tq_own *
> + orig_neigh_node->tq_asym_penalty) /
> + (TQ_MAX_VALUE * TQ_MAX_VALUE));
> +
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "bidirectional: "
> + "orig = %-15pM neigh = %-15pM => own_bcast = %2i, "
> + "real recv = %2i, local tq: %3i, asym_penalty: %3i, "
> + "total tq: %3i\n",
> + orig_node->orig, orig_neigh_node->orig, total_count,
> + neigh_node->real_packet_count, orig_neigh_node->tq_own,
> + orig_neigh_node->tq_asym_penalty, batman_packet->tq);
> +
> + /* if link has the minimum required transmission quality
> + * consider it bidirectional */
> + if (batman_packet->tq >= TQ_TOTAL_BIDRECT_LIMIT)
> + return 1;
> +
> + return 0;
> +}
> +
> +static void update_orig(struct bat_priv *bat_priv,
> + struct orig_node *orig_node,
> + struct ethhdr *ethhdr,
> + struct batman_packet *batman_packet,
> + struct batman_if *if_incoming,
> + unsigned char *hna_buff, int hna_buff_len,
> + char is_duplicate)
> +{
> + struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL;
> + int tmp_hna_buff_len;
> +
> + bat_dbg(DBG_BATMAN, bat_priv, "update_originator(): "
> + "Searching and updating originator entry of received packet\n");
> +
> + list_for_each_entry(tmp_neigh_node, &orig_node->neigh_list, list) {
> + if (compare_orig(tmp_neigh_node->addr, ethhdr->h_source) &&
> + (tmp_neigh_node->if_incoming == if_incoming)) {
> + neigh_node = tmp_neigh_node;
> + continue;
> + }
> +
> + if (is_duplicate)
> + continue;
> +
> + ring_buffer_set(tmp_neigh_node->tq_recv,
> + &tmp_neigh_node->tq_index, 0);
> + tmp_neigh_node->tq_avg =
> + ring_buffer_avg(tmp_neigh_node->tq_recv);
> + }
> +
> + if (!neigh_node) {
> + struct orig_node *orig_tmp;
> +
> + orig_tmp = get_orig_node(bat_priv, ethhdr->h_source);
> + if (!orig_tmp)
> + return;
> +
> + neigh_node = create_neighbor(orig_node, orig_tmp,
> + ethhdr->h_source, if_incoming);
> + if (!neigh_node)
> + return;
> + } else
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "Updating existing last-hop neighbor of originator\n");
> +
> + orig_node->flags = batman_packet->flags;
> + neigh_node->last_valid = jiffies;
> +
> + ring_buffer_set(neigh_node->tq_recv,
> + &neigh_node->tq_index,
> + batman_packet->tq);
> + neigh_node->tq_avg = ring_buffer_avg(neigh_node->tq_recv);
> +
> + if (!is_duplicate) {
> + orig_node->last_ttl = batman_packet->ttl;
> + neigh_node->last_ttl = batman_packet->ttl;
> + }
> +
> + tmp_hna_buff_len = (hna_buff_len > batman_packet->num_hna * ETH_ALEN ?
> + batman_packet->num_hna * ETH_ALEN : hna_buff_len);
> +
> + /* if this neighbor already is our next hop there is nothing
> + * to change */
> + if (orig_node->router == neigh_node)
> + goto update_hna;
> +
> + /* if this neighbor does not offer a better TQ we won't consider it */
> + if ((orig_node->router) &&
> + (orig_node->router->tq_avg > neigh_node->tq_avg))
> + goto update_hna;
> +
> + /* if the TQ is the same and the link not more symetric we
> + * won't consider it either */
> + if ((orig_node->router) &&
> + ((neigh_node->tq_avg == orig_node->router->tq_avg) &&
> + (orig_node->router->orig_node->bcast_own_sum[if_incoming->if_num]
> + >= neigh_node->orig_node->bcast_own_sum[if_incoming->if_num])))
> + goto update_hna;
> +
> + update_routes(bat_priv, orig_node, neigh_node,
> + hna_buff, tmp_hna_buff_len);
> + return;
> +
> +update_hna:
> + update_routes(bat_priv, orig_node, orig_node->router,
> + hna_buff, tmp_hna_buff_len);
> +}
> +
> +/* checks whether the host restarted and is in the protection time.
> + * returns:
> + * 0 if the packet is to be accepted
> + * 1 if the packet is to be ignored.
> + */
> +static int window_protected(struct bat_priv *bat_priv,
> + int32_t seq_num_diff,
> + unsigned long *last_reset)
> +{
> + if ((seq_num_diff <= -TQ_LOCAL_WINDOW_SIZE)
> + || (seq_num_diff >= EXPECTED_SEQNO_RANGE)) {
> + if (time_after(jiffies, *last_reset +
> + msecs_to_jiffies(RESET_PROTECTION_MS))) {
> +
> + *last_reset = jiffies;
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "old packet received, start protection\n");
> +
> + return 0;
> + } else
> + return 1;
> + }
> + return 0;
> +}
> +
> +/* processes a batman packet for all interfaces, adjusts the sequence number and
> + * finds out whether it is a duplicate.
> + * returns:
> + * 1 the packet is a duplicate
> + * 0 the packet has not yet been received
> + * -1 the packet is old and has been received while the seqno window
> + * was protected. Caller should drop it.
> + */
> +static char count_real_packets(struct ethhdr *ethhdr,
> + struct batman_packet *batman_packet,
> + struct batman_if *if_incoming)
> +{
> + struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
> + struct orig_node *orig_node;
> + struct neigh_node *tmp_neigh_node;
> + char is_duplicate = 0;
> + int32_t seq_diff;
> + int need_update = 0;
> + int set_mark;
> +
> + orig_node = get_orig_node(bat_priv, batman_packet->orig);
> + if (orig_node == NULL)
> + return 0;
> +
> + seq_diff = batman_packet->seqno - orig_node->last_real_seqno;
> +
> + /* signalize caller that the packet is to be dropped. */
> + if (window_protected(bat_priv, seq_diff,
> + &orig_node->batman_seqno_reset))
> + return -1;
> +
> + list_for_each_entry(tmp_neigh_node, &orig_node->neigh_list, list) {
> +
> + is_duplicate |= get_bit_status(tmp_neigh_node->real_bits,
> + orig_node->last_real_seqno,
> + batman_packet->seqno);
> +
> + if (compare_orig(tmp_neigh_node->addr, ethhdr->h_source) &&
> + (tmp_neigh_node->if_incoming == if_incoming))
> + set_mark = 1;
> + else
> + set_mark = 0;
> +
> + /* if the window moved, set the update flag. */
> + need_update |= bit_get_packet(bat_priv,
> + tmp_neigh_node->real_bits,
> + seq_diff, set_mark);
> +
> + tmp_neigh_node->real_packet_count =
> + bit_packet_count(tmp_neigh_node->real_bits);
> + }
> +
> + if (need_update) {
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "updating last_seqno: old %d, new %d\n",
> + orig_node->last_real_seqno, batman_packet->seqno);
> + orig_node->last_real_seqno = batman_packet->seqno;
> + }
> +
> + return is_duplicate;
> +}
> +
> +/* copy primary address for bonding */
> +static void mark_bonding_address(struct bat_priv *bat_priv,
> + struct orig_node *orig_node,
> + struct orig_node *orig_neigh_node,
> + struct batman_packet *batman_packet)
> +
> +{
> + if (batman_packet->flags & PRIMARIES_FIRST_HOP)
> + memcpy(orig_neigh_node->primary_addr,
> + orig_node->orig, ETH_ALEN);
> +
> + return;
> +}
> +
> +/* mark possible bond.candidates in the neighbor list */
> +void update_bonding_candidates(struct bat_priv *bat_priv,
> + struct orig_node *orig_node)
> +{
> + int candidates;
> + int interference_candidate;
> + int best_tq;
> + struct neigh_node *tmp_neigh_node, *tmp_neigh_node2;
> + struct neigh_node *first_candidate, *last_candidate;
> +
> + /* update the candidates for this originator */
> + if (!orig_node->router) {
> + orig_node->bond.candidates = 0;
> + return;
> + }
> +
> + best_tq = orig_node->router->tq_avg;
> +
> + /* update bond.candidates */
> +
> + candidates = 0;
> +
> + /* mark other nodes which also received "PRIMARIES FIRST HOP" packets
> + * as "bonding partner" */
> +
> + /* first, zero the list */
> + list_for_each_entry(tmp_neigh_node, &orig_node->neigh_list, list) {
> + tmp_neigh_node->next_bond_candidate = NULL;
> + }
> +
> + first_candidate = NULL;
> + last_candidate = NULL;
> + list_for_each_entry(tmp_neigh_node, &orig_node->neigh_list, list) {
> +
> + /* only consider if it has the same primary address ... */
> + if (memcmp(orig_node->orig,
> + tmp_neigh_node->orig_node->primary_addr,
> + ETH_ALEN) != 0)
> + continue;
> +
> + /* ... and is good enough to be considered */
> + if (tmp_neigh_node->tq_avg < best_tq - BONDING_TQ_THRESHOLD)
> + continue;
> +
> + /* check if we have another candidate with the same
> + * mac address or interface. If we do, we won't
> + * select this candidate because of possible interference. */
> +
> + interference_candidate = 0;
> + list_for_each_entry(tmp_neigh_node2,
> + &orig_node->neigh_list, list) {
> +
> + if (tmp_neigh_node2 == tmp_neigh_node)
> + continue;
> +
> + /* we only care if the other candidate is even
> + * considered as candidate. */
> + if (tmp_neigh_node2->next_bond_candidate == NULL)
> + continue;
> +
> +
> + if ((tmp_neigh_node->if_incoming ==
> + tmp_neigh_node2->if_incoming)
> + || (memcmp(tmp_neigh_node->addr,
> + tmp_neigh_node2->addr, ETH_ALEN) == 0)) {
> +
> + interference_candidate = 1;
> + break;
> + }
> + }
> + /* don't care further if it is an interference candidate */
> + if (interference_candidate)
> + continue;
> +
> + if (first_candidate == NULL) {
> + first_candidate = tmp_neigh_node;
> + tmp_neigh_node->next_bond_candidate = first_candidate;
> + } else
> + tmp_neigh_node->next_bond_candidate = last_candidate;
> +
> + last_candidate = tmp_neigh_node;
> +
> + candidates++;
> + }
> +
> + if (candidates > 0) {
> + first_candidate->next_bond_candidate = last_candidate;
> + orig_node->bond.selected = first_candidate;
> + }
> +
> + orig_node->bond.candidates = candidates;
> +}
> +
> +void receive_bat_packet(struct ethhdr *ethhdr,
> + struct batman_packet *batman_packet,
> + unsigned char *hna_buff, int hna_buff_len,
> + struct batman_if *if_incoming)
> +{
> + struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
> + struct batman_if *batman_if;
> + struct orig_node *orig_neigh_node, *orig_node;
> + char has_directlink_flag;
> + char is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0;
> + char is_broadcast = 0, is_bidirectional, is_single_hop_neigh;
> + char is_duplicate;
> + uint32_t if_incoming_seqno;
> +
> + /* Silently drop when the batman packet is actually not a
> + * correct packet.
> + *
> + * This might happen if a packet is padded (e.g. Ethernet has a
> + * minimum frame length of 64 byte) and the aggregation interprets
> + * it as an additional length.
> + *
> + * TODO: A more sane solution would be to have a bit in the
> + * batman_packet to detect whether the packet is the last
> + * packet in an aggregation. Here we expect that the padding
> + * is always zero (or not 0x01)
> + */
> + if (batman_packet->packet_type != BAT_PACKET)
> + return;
> +
> + /* could be changed by schedule_own_packet() */
> + if_incoming_seqno = atomic_read(&if_incoming->seqno);
> +
> + has_directlink_flag = (batman_packet->flags & DIRECTLINK ? 1 : 0);
> +
> + is_single_hop_neigh = (compare_orig(ethhdr->h_source,
> + batman_packet->orig) ? 1 : 0);
> +
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "Received BATMAN packet via NB: %pM, IF: %s [%s] "
> + "(from OG: %pM, via prev OG: %pM, seqno %d, tq %d, "
> + "TTL %d, V %d, IDF %d)\n",
> + ethhdr->h_source, if_incoming->net_dev->name,
> + if_incoming->addr_str, batman_packet->orig,
> + batman_packet->prev_sender, batman_packet->seqno,
> + batman_packet->tq, batman_packet->ttl, batman_packet->version,
> + has_directlink_flag);
> +
> + list_for_each_entry_rcu(batman_if, &if_list, list) {
> + if (batman_if->if_status != IF_ACTIVE)
> + continue;
> +
> + if (batman_if->soft_iface != if_incoming->soft_iface)
> + continue;
> +
> + if (compare_orig(ethhdr->h_source,
> + batman_if->net_dev->dev_addr))
> + is_my_addr = 1;
> +
> + if (compare_orig(batman_packet->orig,
> + batman_if->net_dev->dev_addr))
> + is_my_orig = 1;
> +
> + if (compare_orig(batman_packet->prev_sender,
> + batman_if->net_dev->dev_addr))
> + is_my_oldorig = 1;
> +
> + if (compare_orig(ethhdr->h_source, broadcast_addr))
> + is_broadcast = 1;
> + }
> +
> + if (batman_packet->version != COMPAT_VERSION) {
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "Drop packet: incompatible batman version (%i)\n",
> + batman_packet->version);
> + return;
> + }
> +
> + if (is_my_addr) {
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "Drop packet: received my own broadcast (sender: %pM"
> + ")\n",
> + ethhdr->h_source);
> + return;
> + }
> +
> + if (is_broadcast) {
> + bat_dbg(DBG_BATMAN, bat_priv, "Drop packet: "
> + "ignoring all packets with broadcast source addr (sender: %pM"
> + ")\n", ethhdr->h_source);
> + return;
> + }
> +
> + if (is_my_orig) {
> + TYPE_OF_WORD *word;
> + int offset;
> +
> + orig_neigh_node = get_orig_node(bat_priv, ethhdr->h_source);
> +
> + if (!orig_neigh_node)
> + return;
> +
> + /* neighbor has to indicate direct link and it has to
> + * come via the corresponding interface */
> + /* if received seqno equals last send seqno save new
> + * seqno for bidirectional check */
> + if (has_directlink_flag &&
> + compare_orig(if_incoming->net_dev->dev_addr,
> + batman_packet->orig) &&
> + (batman_packet->seqno - if_incoming_seqno + 2 == 0)) {
> + offset = if_incoming->if_num * NUM_WORDS;
> + word = &(orig_neigh_node->bcast_own[offset]);
> + bit_mark(word, 0);
> + orig_neigh_node->bcast_own_sum[if_incoming->if_num] =
> + bit_packet_count(word);
> + }
> +
> + bat_dbg(DBG_BATMAN, bat_priv, "Drop packet: "
> + "originator packet from myself (via neighbor)\n");
> + return;
> + }
> +
> + if (is_my_oldorig) {
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "Drop packet: ignoring all rebroadcast echos (sender: "
> + "%pM)\n", ethhdr->h_source);
> + return;
> + }
> +
> + orig_node = get_orig_node(bat_priv, batman_packet->orig);
> + if (orig_node == NULL)
> + return;
> +
> + is_duplicate = count_real_packets(ethhdr, batman_packet, if_incoming);
> +
> + if (is_duplicate == -1) {
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "Drop packet: packet within seqno protection time "
> + "(sender: %pM)\n", ethhdr->h_source);
> + return;
> + }
> +
> + if (batman_packet->tq == 0) {
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "Drop packet: originator packet with tq equal 0\n");
> + return;
> + }
> +
> + /* avoid temporary routing loops */
> + if ((orig_node->router) &&
> + (orig_node->router->orig_node->router) &&
> + (compare_orig(orig_node->router->addr,
> + batman_packet->prev_sender)) &&
> + !(compare_orig(batman_packet->orig, batman_packet->prev_sender)) &&
> + (compare_orig(orig_node->router->addr,
> + orig_node->router->orig_node->router->addr))) {
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "Drop packet: ignoring all rebroadcast packets that "
> + "may make me loop (sender: %pM)\n", ethhdr->h_source);
> + return;
> + }
> +
> + /* if sender is a direct neighbor the sender mac equals
> + * originator mac */
> + orig_neigh_node = (is_single_hop_neigh ?
> + orig_node :
> + get_orig_node(bat_priv, ethhdr->h_source));
> + if (orig_neigh_node == NULL)
> + return;
> +
> + /* drop packet if sender is not a direct neighbor and if we
> + * don't route towards it */
> + if (!is_single_hop_neigh &&
> + (orig_neigh_node->router == NULL)) {
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "Drop packet: OGM via unknown neighbor!\n");
> + return;
> + }
> +
> + is_bidirectional = is_bidirectional_neigh(orig_node, orig_neigh_node,
> + batman_packet, if_incoming);
> +
> + /* update ranking if it is not a duplicate or has the same
> + * seqno and similar ttl as the non-duplicate */
> + if (is_bidirectional &&
> + (!is_duplicate ||
> + ((orig_node->last_real_seqno == batman_packet->seqno) &&
> + (orig_node->last_ttl - 3 <= batman_packet->ttl))))
> + update_orig(bat_priv, orig_node, ethhdr, batman_packet,
> + if_incoming, hna_buff, hna_buff_len, is_duplicate);
> +
> + mark_bonding_address(bat_priv, orig_node,
> + orig_neigh_node, batman_packet);
> + update_bonding_candidates(bat_priv, orig_node);
> +
> + /* is single hop (direct) neighbor */
> + if (is_single_hop_neigh) {
> +
> + /* mark direct link on incoming interface */
> + schedule_forward_packet(orig_node, ethhdr, batman_packet,
> + 1, hna_buff_len, if_incoming);
> +
> + bat_dbg(DBG_BATMAN, bat_priv, "Forwarding packet: "
> + "rebroadcast neighbor packet with direct link flag\n");
> + return;
> + }
> +
> + /* multihop originator */
> + if (!is_bidirectional) {
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "Drop packet: not received via bidirectional link\n");
> + return;
> + }
> +
> + if (is_duplicate) {
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "Drop packet: duplicate packet received\n");
> + return;
> + }
> +
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "Forwarding packet: rebroadcast originator packet\n");
> + schedule_forward_packet(orig_node, ethhdr, batman_packet,
> + 0, hna_buff_len, if_incoming);
> +}
> +
> +int recv_bat_packet(struct sk_buff *skb, struct batman_if *batman_if)
> +{
> + struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
> + struct ethhdr *ethhdr;
> + unsigned long flags;
> +
> + /* drop packet if it has not necessary minimum size */
> + if (unlikely(!pskb_may_pull(skb, sizeof(struct batman_packet))))
> + return NET_RX_DROP;
> +
> + ethhdr = (struct ethhdr *)skb_mac_header(skb);
> +
> + /* packet with broadcast indication but unicast recipient */
> + if (!is_bcast(ethhdr->h_dest))
> + return NET_RX_DROP;
> +
> + /* packet with broadcast sender address */
> + if (is_bcast(ethhdr->h_source))
> + return NET_RX_DROP;
> +
> + /* create a copy of the skb, if needed, to modify it. */
> + if (skb_cow(skb, 0) < 0)
> + return NET_RX_DROP;
> +
> + /* keep skb linear */
> + if (skb_linearize(skb) < 0)
> + return NET_RX_DROP;
> +
> + ethhdr = (struct ethhdr *)skb_mac_header(skb);
> +
> + spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
> + receive_aggr_bat_packet(ethhdr,
> + skb->data,
> + skb_headlen(skb),
> + batman_if);
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> +
> + kfree_skb(skb);
> + return NET_RX_SUCCESS;
> +}
> +
> +static int recv_my_icmp_packet(struct bat_priv *bat_priv,
> + struct sk_buff *skb, size_t icmp_len)
> +{
> + struct orig_node *orig_node;
> + struct icmp_packet_rr *icmp_packet;
> + struct ethhdr *ethhdr;
> + struct batman_if *batman_if;
> + int ret;
> + unsigned long flags;
> + uint8_t dstaddr[ETH_ALEN];
> +
> + icmp_packet = (struct icmp_packet_rr *)skb->data;
> + ethhdr = (struct ethhdr *)skb_mac_header(skb);
> +
> + /* add data to device queue */
> + if (icmp_packet->msg_type != ECHO_REQUEST) {
> + bat_socket_receive_packet(icmp_packet, icmp_len);
> + return NET_RX_DROP;
> + }
> +
> + if (!bat_priv->primary_if)
> + return NET_RX_DROP;
> +
> + /* answer echo request (ping) */
> + /* get routing information */
> + spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
> + orig_node = ((struct orig_node *)hash_find(bat_priv->orig_hash,
> + icmp_packet->orig));
> + ret = NET_RX_DROP;
> +
> + if ((orig_node != NULL) &&
> + (orig_node->router != NULL)) {
> +
> + /* don't lock while sending the packets ... we therefore
> + * copy the required data before sending */
> + batman_if = orig_node->router->if_incoming;
> + memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> +
> + /* create a copy of the skb, if needed, to modify it. */
> + if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
> + return NET_RX_DROP;
> +
> + icmp_packet = (struct icmp_packet_rr *)skb->data;
> + ethhdr = (struct ethhdr *)skb_mac_header(skb);
> +
> + memcpy(icmp_packet->dst, icmp_packet->orig, ETH_ALEN);
> + memcpy(icmp_packet->orig,
> + bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
> + icmp_packet->msg_type = ECHO_REPLY;
> + icmp_packet->ttl = TTL;
> +
> + send_skb_packet(skb, batman_if, dstaddr);
> + ret = NET_RX_SUCCESS;
> +
> + } else
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> +
> + return ret;
> +}
> +
> +static int recv_icmp_ttl_exceeded(struct bat_priv *bat_priv,
> + struct sk_buff *skb, size_t icmp_len)
> +{
> + struct orig_node *orig_node;
> + struct icmp_packet *icmp_packet;
> + struct ethhdr *ethhdr;
> + struct batman_if *batman_if;
> + int ret;
> + unsigned long flags;
> + uint8_t dstaddr[ETH_ALEN];
> +
> + icmp_packet = (struct icmp_packet *)skb->data;
> + ethhdr = (struct ethhdr *)skb_mac_header(skb);
> +
> + /* send TTL exceeded if packet is an echo request (traceroute) */
> + if (icmp_packet->msg_type != ECHO_REQUEST) {
> + pr_debug("Warning - can't forward icmp packet from %pM to "
> + "%pM: ttl exceeded\n", icmp_packet->orig,
> + icmp_packet->dst);
> + return NET_RX_DROP;
> + }
> +
> + if (!bat_priv->primary_if)
> + return NET_RX_DROP;
> +
> + /* get routing information */
> + spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
> + orig_node = ((struct orig_node *)
> + hash_find(bat_priv->orig_hash, icmp_packet->orig));
> + ret = NET_RX_DROP;
> +
> + if ((orig_node != NULL) &&
> + (orig_node->router != NULL)) {
> +
> + /* don't lock while sending the packets ... we therefore
> + * copy the required data before sending */
> + batman_if = orig_node->router->if_incoming;
> + memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> +
> + /* create a copy of the skb, if needed, to modify it. */
> + if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
> + return NET_RX_DROP;
> +
> + icmp_packet = (struct icmp_packet *) skb->data;
> + ethhdr = (struct ethhdr *)skb_mac_header(skb);
> +
> + memcpy(icmp_packet->dst, icmp_packet->orig, ETH_ALEN);
> + memcpy(icmp_packet->orig,
> + bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
> + icmp_packet->msg_type = TTL_EXCEEDED;
> + icmp_packet->ttl = TTL;
> +
> + send_skb_packet(skb, batman_if, dstaddr);
> + ret = NET_RX_SUCCESS;
> +
> + } else
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> +
> + return ret;
> +}
> +
> +
> +int recv_icmp_packet(struct sk_buff *skb, struct batman_if *recv_if)
> +{
> + struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
> + struct icmp_packet_rr *icmp_packet;
> + struct ethhdr *ethhdr;
> + struct orig_node *orig_node;
> + struct batman_if *batman_if;
> + int hdr_size = sizeof(struct icmp_packet);
> + int ret;
> + unsigned long flags;
> + uint8_t dstaddr[ETH_ALEN];
> +
> + /**
> + * we truncate all incoming icmp packets if they don't match our size
> + */
> + if (skb->len >= sizeof(struct icmp_packet_rr))
> + hdr_size = sizeof(struct icmp_packet_rr);
> +
> + /* drop packet if it has not necessary minimum size */
> + if (unlikely(!pskb_may_pull(skb, hdr_size)))
> + return NET_RX_DROP;
> +
> + ethhdr = (struct ethhdr *)skb_mac_header(skb);
> +
> + /* packet with unicast indication but broadcast recipient */
> + if (is_bcast(ethhdr->h_dest))
> + return NET_RX_DROP;
> +
> + /* packet with broadcast sender address */
> + if (is_bcast(ethhdr->h_source))
> + return NET_RX_DROP;
> +
> + /* not for me */
> + if (!is_my_mac(ethhdr->h_dest))
> + return NET_RX_DROP;
> +
> + icmp_packet = (struct icmp_packet_rr *)skb->data;
> +
> + /* add record route information if not full */
> + if ((hdr_size == sizeof(struct icmp_packet_rr)) &&
> + (icmp_packet->rr_cur < BAT_RR_LEN)) {
> + memcpy(&(icmp_packet->rr[icmp_packet->rr_cur]),
> + ethhdr->h_dest, ETH_ALEN);
> + icmp_packet->rr_cur++;
> + }
> +
> + /* packet for me */
> + if (is_my_mac(icmp_packet->dst))
> + return recv_my_icmp_packet(bat_priv, skb, hdr_size);
> +
> + /* TTL exceeded */
> + if (icmp_packet->ttl < 2)
> + return recv_icmp_ttl_exceeded(bat_priv, skb, hdr_size);
> +
> + ret = NET_RX_DROP;
> +
> + /* get routing information */
> + spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
> + orig_node = ((struct orig_node *)
> + hash_find(bat_priv->orig_hash, icmp_packet->dst));
> +
> + if ((orig_node != NULL) &&
> + (orig_node->router != NULL)) {
> +
> + /* don't lock while sending the packets ... we therefore
> + * copy the required data before sending */
> + batman_if = orig_node->router->if_incoming;
> + memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> +
> + /* create a copy of the skb, if needed, to modify it. */
> + if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
> + return NET_RX_DROP;
> +
> + icmp_packet = (struct icmp_packet_rr *)skb->data;
> + ethhdr = (struct ethhdr *)skb_mac_header(skb);
> +
> + /* decrement ttl */
> + icmp_packet->ttl--;
> +
> + /* route it */
> + send_skb_packet(skb, batman_if, dstaddr);
> + ret = NET_RX_SUCCESS;
> +
> + } else
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> +
> + return ret;
> +}
> +
> +/* find a suitable router for this originator, and use
> + * bonding if possible. */
> +struct neigh_node *find_router(struct orig_node *orig_node,
> + struct batman_if *recv_if)
> +{
> + struct bat_priv *bat_priv;
> + struct orig_node *primary_orig_node;
> + struct orig_node *router_orig;
> + struct neigh_node *router, *first_candidate, *best_router;
> + static uint8_t zero_mac[ETH_ALEN] = {0, 0, 0, 0, 0, 0};
> + int bonding_enabled;
> +
> + if (!orig_node)
> + return NULL;
> +
> + if (!orig_node->router)
> + return NULL;
> +
> + /* without bonding, the first node should
> + * always choose the default router. */
> +
> + if (!recv_if)
> + return orig_node->router;
> +
> + bat_priv = netdev_priv(recv_if->soft_iface);
> + bonding_enabled = atomic_read(&bat_priv->bonding_enabled);
> +
> + if (!bonding_enabled)
> + return orig_node->router;
> +
> + router_orig = orig_node->router->orig_node;
> +
> + /* if we have something in the primary_addr, we can search
> + * for a potential bonding candidate. */
> + if (memcmp(router_orig->primary_addr, zero_mac, ETH_ALEN) == 0)
> + return orig_node->router;
> +
> + /* find the orig_node which has the primary interface. might
> + * even be the same as our router_orig in many cases */
> +
> + if (memcmp(router_orig->primary_addr,
> + router_orig->orig, ETH_ALEN) == 0) {
> + primary_orig_node = router_orig;
> + } else {
> + primary_orig_node = hash_find(bat_priv->orig_hash,
> + router_orig->primary_addr);
> +
> + if (!primary_orig_node)
> + return orig_node->router;
> + }
> +
> + /* with less than 2 candidates, we can't do any
> + * bonding and prefer the original router. */
> +
> + if (primary_orig_node->bond.candidates < 2)
> + return orig_node->router;
> +
> +
> + /* all nodes between should choose a candidate which
> + * is is not on the interface where the packet came
> + * in. */
> + first_candidate = primary_orig_node->bond.selected;
> + router = first_candidate;
> +
> + if (bonding_enabled) {
> + /* in the bonding case, send the packets in a round
> + * robin fashion over the remaining interfaces. */
> + do {
> + /* recv_if == NULL on the first node. */
> + if (router->if_incoming != recv_if)
> + break;
> +
> + router = router->next_bond_candidate;
> + } while (router != first_candidate);
> +
> + primary_orig_node->bond.selected = router->next_bond_candidate;
> +
> + } else {
> + /* if bonding is disabled, use the best of the
> + * remaining candidates which are not using
> + * this interface. */
> + best_router = first_candidate;
> +
> + do {
> + /* recv_if == NULL on the first node. */
> + if ((router->if_incoming != recv_if) &&
> + (router->tq_avg > best_router->tq_avg))
> + best_router = router;
> +
> + router = router->next_bond_candidate;
> + } while (router != first_candidate);
> +
> + router = best_router;
> + }
> +
> + return router;
> +}
> +
> +static int check_unicast_packet(struct sk_buff *skb, int hdr_size)
> +{
> + struct ethhdr *ethhdr;
> +
> + /* drop packet if it has not necessary minimum size */
> + if (unlikely(!pskb_may_pull(skb, hdr_size)))
> + return -1;
> +
> + ethhdr = (struct ethhdr *)skb_mac_header(skb);
> +
> + /* packet with unicast indication but broadcast recipient */
> + if (is_bcast(ethhdr->h_dest))
> + return -1;
> +
> + /* packet with broadcast sender address */
> + if (is_bcast(ethhdr->h_source))
> + return -1;
> +
> + /* not for me */
> + if (!is_my_mac(ethhdr->h_dest))
> + return -1;
> +
> + return 0;
> +}
> +
> +static int route_unicast_packet(struct sk_buff *skb,
> + struct batman_if *recv_if, int hdr_size)
> +{
> + struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
> + struct orig_node *orig_node;
> + struct neigh_node *router;
> + struct batman_if *batman_if;
> + uint8_t dstaddr[ETH_ALEN];
> + unsigned long flags;
> + struct unicast_packet *unicast_packet;
> + struct ethhdr *ethhdr = (struct ethhdr *)skb_mac_header(skb);
> +
> + unicast_packet = (struct unicast_packet *)skb->data;
> +
> + /* packet for me */
> + if (is_my_mac(unicast_packet->dest)) {
> + interface_rx(recv_if->soft_iface, skb, hdr_size);
> + return NET_RX_SUCCESS;
> + }
> +
> + /* TTL exceeded */
> + if (unicast_packet->ttl < 2) {
> + pr_debug("Warning - can't forward unicast packet from %pM to "
> + "%pM: ttl exceeded\n", ethhdr->h_source,
> + unicast_packet->dest);
> + return NET_RX_DROP;
> + }
> +
> + /* get routing information */
> + spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
> + orig_node = ((struct orig_node *)
> + hash_find(bat_priv->orig_hash, unicast_packet->dest));
> +
> + router = find_router(orig_node, recv_if);
> +
> + if (!router) {
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> + return NET_RX_DROP;
> + }
> +
> + /* don't lock while sending the packets ... we therefore
> + * copy the required data before sending */
> +
> + batman_if = router->if_incoming;
> + memcpy(dstaddr, router->addr, ETH_ALEN);
> +
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> +
> + /* create a copy of the skb, if needed, to modify it. */
> + if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
> + return NET_RX_DROP;
> +
> + unicast_packet = (struct unicast_packet *)skb->data;
> + ethhdr = (struct ethhdr *)skb_mac_header(skb);
> +
> + /* decrement ttl */
> + unicast_packet->ttl--;
> +
> + /* route it */
> + send_skb_packet(skb, batman_if, dstaddr);
> +
> + return NET_RX_SUCCESS;
> +}
> +
> +int recv_unicast_packet(struct sk_buff *skb, struct batman_if *recv_if)
> +{
> + struct unicast_packet *unicast_packet;
> + int hdr_size = sizeof(struct unicast_packet);
> +
> + if (check_unicast_packet(skb, hdr_size) < 0)
> + return NET_RX_DROP;
> +
> + unicast_packet = (struct unicast_packet *)skb->data;
> +
> + /* packet for me */
> + if (is_my_mac(unicast_packet->dest)) {
> + interface_rx(recv_if->soft_iface, skb, hdr_size);
> + return NET_RX_SUCCESS;
> + }
> +
> + return route_unicast_packet(skb, recv_if, hdr_size);
> +}
> +
> +int recv_ucast_frag_packet(struct sk_buff *skb, struct batman_if *recv_if)
> +{
> + struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
> + struct unicast_frag_packet *unicast_packet;
> + struct orig_node *orig_node;
> + struct frag_packet_list_entry *tmp_frag_entry;
> + int hdr_size = sizeof(struct unicast_frag_packet);
> + unsigned long flags;
> +
> + if (check_unicast_packet(skb, hdr_size) < 0)
> + return NET_RX_DROP;
> +
> + unicast_packet = (struct unicast_frag_packet *)skb->data;
> +
> + /* packet for me */
> + if (is_my_mac(unicast_packet->dest)) {
> +
> + spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
> + orig_node = ((struct orig_node *)
> + hash_find(bat_priv->orig_hash, unicast_packet->orig));
> +
> + if (!orig_node) {
> + pr_debug("couldn't find orig node for fragmentation\n");
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock,
> + flags);
> + return NET_RX_DROP;
> + }
> +
> + orig_node->last_frag_packet = jiffies;
> +
> + if (list_empty(&orig_node->frag_list))
> + create_frag_buffer(&orig_node->frag_list);
> +
> + tmp_frag_entry =
> + search_frag_packet(&orig_node->frag_list,
> + unicast_packet);
> +
> + if (!tmp_frag_entry) {
> + create_frag_entry(&orig_node->frag_list, skb);
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock,
> + flags);
> + return NET_RX_SUCCESS;
> + }
> +
> + skb = merge_frag_packet(&orig_node->frag_list,
> + tmp_frag_entry, skb);
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> + if (!skb)
> + return NET_RX_DROP;
> +
> + interface_rx(recv_if->soft_iface, skb, hdr_size);
> + return NET_RX_SUCCESS;
> + }
> +
> + return route_unicast_packet(skb, recv_if, hdr_size);
> +}
> +
> +
> +int recv_bcast_packet(struct sk_buff *skb, struct batman_if *recv_if)
> +{
> + struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
> + struct orig_node *orig_node;
> + struct bcast_packet *bcast_packet;
> + struct ethhdr *ethhdr;
> + int hdr_size = sizeof(struct bcast_packet);
> + int32_t seq_diff;
> + unsigned long flags;
> +
> + /* drop packet if it has not necessary minimum size */
> + if (unlikely(!pskb_may_pull(skb, hdr_size)))
> + return NET_RX_DROP;
> +
> + ethhdr = (struct ethhdr *)skb_mac_header(skb);
> +
> + /* packet with broadcast indication but unicast recipient */
> + if (!is_bcast(ethhdr->h_dest))
> + return NET_RX_DROP;
> +
> + /* packet with broadcast sender address */
> + if (is_bcast(ethhdr->h_source))
> + return NET_RX_DROP;
> +
> + /* ignore broadcasts sent by myself */
> + if (is_my_mac(ethhdr->h_source))
> + return NET_RX_DROP;
> +
> + bcast_packet = (struct bcast_packet *)skb->data;
> +
> + /* ignore broadcasts originated by myself */
> + if (is_my_mac(bcast_packet->orig))
> + return NET_RX_DROP;
> +
> + if (bcast_packet->ttl < 2)
> + return NET_RX_DROP;
> +
> + spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
> + orig_node = ((struct orig_node *)
> + hash_find(bat_priv->orig_hash, bcast_packet->orig));
> +
> + if (orig_node == NULL) {
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> + return NET_RX_DROP;
> + }
> +
> + /* check whether the packet is a duplicate */
> + if (get_bit_status(orig_node->bcast_bits,
> + orig_node->last_bcast_seqno,
> + ntohl(bcast_packet->seqno))) {
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> + return NET_RX_DROP;
> + }
> +
> + seq_diff = ntohl(bcast_packet->seqno) - orig_node->last_bcast_seqno;
> +
> + /* check whether the packet is old and the host just restarted. */
> + if (window_protected(bat_priv, seq_diff,
> + &orig_node->bcast_seqno_reset)) {
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> + return NET_RX_DROP;
> + }
> +
> + /* mark broadcast in flood history, update window position
> + * if required. */
> + if (bit_get_packet(bat_priv, orig_node->bcast_bits, seq_diff, 1))
> + orig_node->last_bcast_seqno = ntohl(bcast_packet->seqno);
> +
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> + /* rebroadcast packet */
> + add_bcast_packet_to_list(bat_priv, skb);
> +
> + /* broadcast for me */
> + interface_rx(recv_if->soft_iface, skb, hdr_size);
> +
> + return NET_RX_SUCCESS;
> +}
> +
> +int recv_vis_packet(struct sk_buff *skb, struct batman_if *recv_if)
> +{
> + struct vis_packet *vis_packet;
> + struct ethhdr *ethhdr;
> + struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
> + int hdr_size = sizeof(struct vis_packet);
> +
> + /* keep skb linear */
> + if (skb_linearize(skb) < 0)
> + return NET_RX_DROP;
> +
> + if (unlikely(!pskb_may_pull(skb, hdr_size)))
> + return NET_RX_DROP;
> +
> + vis_packet = (struct vis_packet *)skb->data;
> + ethhdr = (struct ethhdr *)skb_mac_header(skb);
> +
> + /* not for me */
> + if (!is_my_mac(ethhdr->h_dest))
> + return NET_RX_DROP;
> +
> + /* ignore own packets */
> + if (is_my_mac(vis_packet->vis_orig))
> + return NET_RX_DROP;
> +
> + if (is_my_mac(vis_packet->sender_orig))
> + return NET_RX_DROP;
> +
> + switch (vis_packet->vis_type) {
> + case VIS_TYPE_SERVER_SYNC:
> + receive_server_sync_packet(bat_priv, vis_packet,
> + skb_headlen(skb));
> + break;
> +
> + case VIS_TYPE_CLIENT_UPDATE:
> + receive_client_update_packet(bat_priv, vis_packet,
> + skb_headlen(skb));
> + break;
> +
> + default: /* ignore unknown packet */
> + break;
> + }
> +
> + /* We take a copy of the data in the packet, so we should
> + always free the skbuf. */
> + return NET_RX_DROP;
> +}
> diff --git a/net/batman-adv/routing.h b/net/batman-adv/routing.h
> new file mode 100644
> index 0000000..06ea99d
> --- /dev/null
> +++ b/net/batman-adv/routing.h
> @@ -0,0 +1,46 @@
> +/*
> + * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner, Simon Wunderlich
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#ifndef _NET_BATMAN_ADV_ROUTING_H_
> +#define _NET_BATMAN_ADV_ROUTING_H_
> +
> +#include "types.h"
> +
> +void slide_own_bcast_window(struct batman_if *batman_if);
> +void receive_bat_packet(struct ethhdr *ethhdr,
> + struct batman_packet *batman_packet,
> + unsigned char *hna_buff, int hna_buff_len,
> + struct batman_if *if_incoming);
> +void update_routes(struct bat_priv *bat_priv, struct orig_node *orig_node,
> + struct neigh_node *neigh_node, unsigned char *hna_buff,
> + int hna_buff_len);
> +int recv_icmp_packet(struct sk_buff *skb, struct batman_if *recv_if);
> +int recv_unicast_packet(struct sk_buff *skb, struct batman_if *recv_if);
> +int recv_ucast_frag_packet(struct sk_buff *skb, struct batman_if *recv_if);
> +int recv_bcast_packet(struct sk_buff *skb, struct batman_if *recv_if);
> +int recv_vis_packet(struct sk_buff *skb, struct batman_if *recv_if);
> +int recv_bat_packet(struct sk_buff *skb, struct batman_if *recv_if);
> +struct neigh_node *find_router(struct orig_node *orig_node,
> + struct batman_if *recv_if);
> +void update_bonding_candidates(struct bat_priv *bat_priv,
> + struct orig_node *orig_node);
> +
> +#endif /* _NET_BATMAN_ADV_ROUTING_H_ */
> diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c
> new file mode 100644
> index 0000000..5d57ef5
> --- /dev/null
> +++ b/net/batman-adv/send.c
> @@ -0,0 +1,577 @@
> +/*
> + * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner, Simon Wunderlich
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#include "main.h"
> +#include "send.h"
> +#include "routing.h"
> +#include "translation-table.h"
> +#include "soft-interface.h"
> +#include "hard-interface.h"
> +#include "types.h"
> +#include "vis.h"
> +#include "aggregation.h"
> +
> +
> +static void send_outstanding_bcast_packet(struct work_struct *work);
> +
> +/* apply hop penalty for a normal link */
> +static uint8_t hop_penalty(const uint8_t tq)
> +{
> + return (tq * (TQ_MAX_VALUE - TQ_HOP_PENALTY)) / (TQ_MAX_VALUE);
> +}
> +
> +/* when do we schedule our own packet to be sent */
> +static unsigned long own_send_time(struct bat_priv *bat_priv)
> +{
> + return jiffies + msecs_to_jiffies(
> + atomic_read(&bat_priv->orig_interval) -
> + JITTER + (random32() % 2*JITTER));
> +}
> +
> +/* when do we schedule a forwarded packet to be sent */
> +static unsigned long forward_send_time(struct bat_priv *bat_priv)
> +{
> + return jiffies + msecs_to_jiffies(random32() % (JITTER/2));
> +}
> +
> +/* send out an already prepared packet to the given address via the
> + * specified batman interface */
> +int send_skb_packet(struct sk_buff *skb,
> + struct batman_if *batman_if,
> + uint8_t *dst_addr)
> +{
> + struct ethhdr *ethhdr;
> +
> + if (batman_if->if_status != IF_ACTIVE)
> + goto send_skb_err;
> +
> + if (unlikely(!batman_if->net_dev))
> + goto send_skb_err;
> +
> + if (!(batman_if->net_dev->flags & IFF_UP)) {
> + pr_warning("Interface %s is not up - can't send packet via "
> + "that interface!\n", batman_if->net_dev->name);
> + goto send_skb_err;
> + }
> +
> + /* push to the ethernet header. */
> + if (my_skb_head_push(skb, sizeof(struct ethhdr)) < 0)
> + goto send_skb_err;
> +
> + skb_reset_mac_header(skb);
> +
> + ethhdr = (struct ethhdr *) skb_mac_header(skb);
> + memcpy(ethhdr->h_source, batman_if->net_dev->dev_addr, ETH_ALEN);
> + memcpy(ethhdr->h_dest, dst_addr, ETH_ALEN);
> + ethhdr->h_proto = __constant_htons(ETH_P_BATMAN);
> +
> + skb_set_network_header(skb, ETH_HLEN);
> + skb->priority = TC_PRIO_CONTROL;
> + skb->protocol = __constant_htons(ETH_P_BATMAN);
> +
> + skb->dev = batman_if->net_dev;
> +
> + /* dev_queue_xmit() returns a negative result on error. However on
> + * congestion and traffic shaping, it drops and returns NET_XMIT_DROP
> + * (which is > 0). This will not be treated as an error. */
> +
> + return dev_queue_xmit(skb);
> +send_skb_err:
> + kfree_skb(skb);
> + return NET_XMIT_DROP;
> +}
> +
> +/* Send a packet to a given interface */
> +static void send_packet_to_if(struct forw_packet *forw_packet,
> + struct batman_if *batman_if)
> +{
> + struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
> + char *fwd_str;
> + uint8_t packet_num;
> + int16_t buff_pos;
> + struct batman_packet *batman_packet;
> + struct sk_buff *skb;
> +
> + if (batman_if->if_status != IF_ACTIVE)
> + return;
> +
> + packet_num = 0;
> + buff_pos = 0;
> + batman_packet = (struct batman_packet *)forw_packet->skb->data;
> +
> + /* adjust all flags and log packets */
> + while (aggregated_packet(buff_pos,
> + forw_packet->packet_len,
> + batman_packet->num_hna)) {
> +
> + /* we might have aggregated direct link packets with an
> + * ordinary base packet */
> + if ((forw_packet->direct_link_flags & (1 << packet_num)) &&
> + (forw_packet->if_incoming == batman_if))
> + batman_packet->flags |= DIRECTLINK;
> + else
> + batman_packet->flags &= ~DIRECTLINK;
> +
> + fwd_str = (packet_num > 0 ? "Forwarding" : (forw_packet->own ?
> + "Sending own" :
> + "Forwarding"));
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "%s %spacket (originator %pM, seqno %d, TQ %d, TTL %d,"
> + " IDF %s) on interface %s [%s]\n",
> + fwd_str, (packet_num > 0 ? "aggregated " : ""),
> + batman_packet->orig, ntohl(batman_packet->seqno),
> + batman_packet->tq, batman_packet->ttl,
> + (batman_packet->flags & DIRECTLINK ?
> + "on" : "off"),
> + batman_if->net_dev->name, batman_if->addr_str);
> +
> + buff_pos += sizeof(struct batman_packet) +
> + (batman_packet->num_hna * ETH_ALEN);
> + packet_num++;
> + batman_packet = (struct batman_packet *)
> + (forw_packet->skb->data + buff_pos);
> + }
> +
> + /* create clone because function is called more than once */
> + skb = skb_clone(forw_packet->skb, GFP_ATOMIC);
> + if (skb)
> + send_skb_packet(skb, batman_if, broadcast_addr);
> +}
> +
> +/* send a batman packet */
> +static void send_packet(struct forw_packet *forw_packet)
> +{
> + struct batman_if *batman_if;
> + struct net_device *soft_iface = forw_packet->if_incoming->soft_iface;
> + struct bat_priv *bat_priv = netdev_priv(soft_iface);
> + struct batman_packet *batman_packet =
> + (struct batman_packet *)(forw_packet->skb->data);
> + unsigned char directlink = (batman_packet->flags & DIRECTLINK ? 1 : 0);
> +
> + if (!forw_packet->if_incoming) {
> + pr_err("Error - can't forward packet: incoming iface not "
> + "specified\n");
> + return;
> + }
> +
> + if (forw_packet->if_incoming->if_status != IF_ACTIVE)
> + return;
> +
> + /* multihomed peer assumed */
> + /* non-primary OGMs are only broadcasted on their interface */
> + if ((directlink && (batman_packet->ttl == 1)) ||
> + (forw_packet->own && (forw_packet->if_incoming->if_num > 0))) {
> +
> + /* FIXME: what about aggregated packets ? */
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "%s packet (originator %pM, seqno %d, TTL %d) "
> + "on interface %s [%s]\n",
> + (forw_packet->own ? "Sending own" : "Forwarding"),
> + batman_packet->orig, ntohl(batman_packet->seqno),
> + batman_packet->ttl,
> + forw_packet->if_incoming->net_dev->name,
> + forw_packet->if_incoming->addr_str);
> +
> + /* skb is only used once and than forw_packet is free'd */
> + send_skb_packet(forw_packet->skb, forw_packet->if_incoming,
> + broadcast_addr);
> + forw_packet->skb = NULL;
> +
> + return;
> + }
> +
> + /* broadcast on every interface */
> + rcu_read_lock();
> + list_for_each_entry_rcu(batman_if, &if_list, list) {
> + if (batman_if->soft_iface != soft_iface)
> + continue;
> +
> + send_packet_to_if(forw_packet, batman_if);
> + }
> + rcu_read_unlock();
> +}
> +
> +static void rebuild_batman_packet(struct bat_priv *bat_priv,
> + struct batman_if *batman_if)
> +{
> + int new_len;
> + unsigned char *new_buff;
> + struct batman_packet *batman_packet;
> +
> + new_len = sizeof(struct batman_packet) +
> + (bat_priv->num_local_hna * ETH_ALEN);
> + new_buff = kmalloc(new_len, GFP_ATOMIC);
> +
> + /* keep old buffer if kmalloc should fail */
> + if (new_buff) {
> + memcpy(new_buff, batman_if->packet_buff,
> + sizeof(struct batman_packet));
> + batman_packet = (struct batman_packet *)new_buff;
> +
> + batman_packet->num_hna = hna_local_fill_buffer(bat_priv,
> + new_buff + sizeof(struct batman_packet),
> + new_len - sizeof(struct batman_packet));
> +
> + kfree(batman_if->packet_buff);
> + batman_if->packet_buff = new_buff;
> + batman_if->packet_len = new_len;
> + }
> +}
> +
> +void schedule_own_packet(struct batman_if *batman_if)
> +{
> + struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
> + unsigned long send_time;
> + struct batman_packet *batman_packet;
> + int vis_server;
> +
> + if ((batman_if->if_status == IF_NOT_IN_USE) ||
> + (batman_if->if_status == IF_TO_BE_REMOVED))
> + return;
> +
> + vis_server = atomic_read(&bat_priv->vis_mode);
> +
> + /**
> + * the interface gets activated here to avoid race conditions between
> + * the moment of activating the interface in
> + * hardif_activate_interface() where the originator mac is set and
> + * outdated packets (especially uninitialized mac addresses) in the
> + * packet queue
> + */
> + if (batman_if->if_status == IF_TO_BE_ACTIVATED)
> + batman_if->if_status = IF_ACTIVE;
> +
> + /* if local hna has changed and interface is a primary interface */
> + if ((atomic_read(&bat_priv->hna_local_changed)) &&
> + (batman_if == bat_priv->primary_if))
> + rebuild_batman_packet(bat_priv, batman_if);
> +
> + /**
> + * NOTE: packet_buff might just have been re-allocated in
> + * rebuild_batman_packet()
> + */
> + batman_packet = (struct batman_packet *)batman_if->packet_buff;
> +
> + /* change sequence number to network order */
> + batman_packet->seqno =
> + htonl((uint32_t)atomic_read(&batman_if->seqno));
> +
> + if (vis_server == VIS_TYPE_SERVER_SYNC)
> + batman_packet->flags |= VIS_SERVER;
> + else
> + batman_packet->flags &= ~VIS_SERVER;
> +
> + atomic_inc(&batman_if->seqno);
> +
> + slide_own_bcast_window(batman_if);
> + send_time = own_send_time(bat_priv);
> + add_bat_packet_to_list(bat_priv,
> + batman_if->packet_buff,
> + batman_if->packet_len,
> + batman_if, 1, send_time);
> +}
> +
> +void schedule_forward_packet(struct orig_node *orig_node,
> + struct ethhdr *ethhdr,
> + struct batman_packet *batman_packet,
> + uint8_t directlink, int hna_buff_len,
> + struct batman_if *if_incoming)
> +{
> + struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
> + unsigned char in_tq, in_ttl, tq_avg = 0;
> + unsigned long send_time;
> +
> + if (batman_packet->ttl <= 1) {
> + bat_dbg(DBG_BATMAN, bat_priv, "ttl exceeded\n");
> + return;
> + }
> +
> + in_tq = batman_packet->tq;
> + in_ttl = batman_packet->ttl;
> +
> + batman_packet->ttl--;
> + memcpy(batman_packet->prev_sender, ethhdr->h_source, ETH_ALEN);
> +
> + /* rebroadcast tq of our best ranking neighbor to ensure the rebroadcast
> + * of our best tq value */
> + if ((orig_node->router) && (orig_node->router->tq_avg != 0)) {
> +
> + /* rebroadcast ogm of best ranking neighbor as is */
> + if (!compare_orig(orig_node->router->addr, ethhdr->h_source)) {
> + batman_packet->tq = orig_node->router->tq_avg;
> +
> + if (orig_node->router->last_ttl)
> + batman_packet->ttl = orig_node->router->last_ttl
> + - 1;
> + }
> +
> + tq_avg = orig_node->router->tq_avg;
> + }
> +
> + /* apply hop penalty */
> + batman_packet->tq = hop_penalty(batman_packet->tq);
> +
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "Forwarding packet: tq_orig: %i, tq_avg: %i, "
> + "tq_forw: %i, ttl_orig: %i, ttl_forw: %i\n",
> + in_tq, tq_avg, batman_packet->tq, in_ttl - 1,
> + batman_packet->ttl);
> +
> + batman_packet->seqno = htonl(batman_packet->seqno);
> +
> + /* switch of primaries first hop flag when forwarding */
> + batman_packet->flags &= ~PRIMARIES_FIRST_HOP;
> + if (directlink)
> + batman_packet->flags |= DIRECTLINK;
> + else
> + batman_packet->flags &= ~DIRECTLINK;
> +
> + send_time = forward_send_time(bat_priv);
> + add_bat_packet_to_list(bat_priv,
> + (unsigned char *)batman_packet,
> + sizeof(struct batman_packet) + hna_buff_len,
> + if_incoming, 0, send_time);
> +}
> +
> +static void forw_packet_free(struct forw_packet *forw_packet)
> +{
> + if (forw_packet->skb)
> + kfree_skb(forw_packet->skb);
> + kfree(forw_packet);
> +}
> +
> +static void _add_bcast_packet_to_list(struct bat_priv *bat_priv,
> + struct forw_packet *forw_packet,
> + unsigned long send_time)
> +{
> + unsigned long flags;
> + INIT_HLIST_NODE(&forw_packet->list);
> +
> + /* add new packet to packet list */
> + spin_lock_irqsave(&bat_priv->forw_bcast_list_lock, flags);
> + hlist_add_head(&forw_packet->list, &bat_priv->forw_bcast_list);
> + spin_unlock_irqrestore(&bat_priv->forw_bcast_list_lock, flags);
> +
> + /* start timer for this packet */
> + INIT_DELAYED_WORK(&forw_packet->delayed_work,
> + send_outstanding_bcast_packet);
> + queue_delayed_work(bat_event_workqueue, &forw_packet->delayed_work,
> + send_time);
> +}
> +
> +#define atomic_dec_not_zero(v) atomic_add_unless((v), -1, 0)
> +/* add a broadcast packet to the queue and setup timers. broadcast packets
> + * are sent multiple times to increase probability for beeing received.
> + *
> + * This function returns NETDEV_TX_OK on success and NETDEV_TX_BUSY on
> + * errors.
> + *
> + * The skb is not consumed, so the caller should make sure that the
> + * skb is freed. */
> +int add_bcast_packet_to_list(struct bat_priv *bat_priv, struct sk_buff *skb)
> +{
> + struct forw_packet *forw_packet;
> + struct bcast_packet *bcast_packet;
> +
> + if (!atomic_dec_not_zero(&bat_priv->bcast_queue_left)) {
> + bat_dbg(DBG_BATMAN, bat_priv, "bcast packet queue full\n");
> + goto out;
> + }
> +
> + if (!bat_priv->primary_if)
> + goto out;
> +
> + forw_packet = kmalloc(sizeof(struct forw_packet), GFP_ATOMIC);
> +
> + if (!forw_packet)
> + goto out_and_inc;
> +
> + skb = skb_copy(skb, GFP_ATOMIC);
> + if (!skb)
> + goto packet_free;
> +
> + /* as we have a copy now, it is safe to decrease the TTL */
> + bcast_packet = (struct bcast_packet *)skb->data;
> + bcast_packet->ttl--;
> +
> + skb_reset_mac_header(skb);
> +
> + forw_packet->skb = skb;
> + forw_packet->if_incoming = bat_priv->primary_if;
> +
> + /* how often did we send the bcast packet ? */
> + forw_packet->num_packets = 0;
> +
> + _add_bcast_packet_to_list(bat_priv, forw_packet, 1);
> + return NETDEV_TX_OK;
> +
> +packet_free:
> + kfree(forw_packet);
> +out_and_inc:
> + atomic_inc(&bat_priv->bcast_queue_left);
> +out:
> + return NETDEV_TX_BUSY;
> +}
> +
> +static void send_outstanding_bcast_packet(struct work_struct *work)
> +{
> + struct batman_if *batman_if;
> + struct delayed_work *delayed_work =
> + container_of(work, struct delayed_work, work);
> + struct forw_packet *forw_packet =
> + container_of(delayed_work, struct forw_packet, delayed_work);
> + unsigned long flags;
> + struct sk_buff *skb1;
> + struct net_device *soft_iface = forw_packet->if_incoming->soft_iface;
> + struct bat_priv *bat_priv = netdev_priv(soft_iface);
> +
> + spin_lock_irqsave(&bat_priv->forw_bcast_list_lock, flags);
> + hlist_del(&forw_packet->list);
> + spin_unlock_irqrestore(&bat_priv->forw_bcast_list_lock, flags);
> +
> + if (atomic_read(&bat_priv->mesh_state) == MESH_DEACTIVATING)
> + goto out;
> +
> + /* rebroadcast packet */
> + rcu_read_lock();
> + list_for_each_entry_rcu(batman_if, &if_list, list) {
> + if (batman_if->soft_iface != soft_iface)
> + continue;
> +
> + /* send a copy of the saved skb */
> + skb1 = skb_clone(forw_packet->skb, GFP_ATOMIC);
> + if (skb1)
> + send_skb_packet(skb1, batman_if, broadcast_addr);
> + }
> + rcu_read_unlock();
> +
> + forw_packet->num_packets++;
> +
> + /* if we still have some more bcasts to send */
> + if (forw_packet->num_packets < 3) {
> + _add_bcast_packet_to_list(bat_priv, forw_packet,
> + ((5 * HZ) / 1000));
> + return;
> + }
> +
> +out:
> + forw_packet_free(forw_packet);
> + atomic_inc(&bat_priv->bcast_queue_left);
> +}
> +
> +void send_outstanding_bat_packet(struct work_struct *work)
> +{
> + struct delayed_work *delayed_work =
> + container_of(work, struct delayed_work, work);
> + struct forw_packet *forw_packet =
> + container_of(delayed_work, struct forw_packet, delayed_work);
> + unsigned long flags;
> + struct bat_priv *bat_priv;
> +
> + bat_priv = netdev_priv(forw_packet->if_incoming->soft_iface);
> + spin_lock_irqsave(&bat_priv->forw_bat_list_lock, flags);
> + hlist_del(&forw_packet->list);
> + spin_unlock_irqrestore(&bat_priv->forw_bat_list_lock, flags);
> +
> + if (atomic_read(&bat_priv->mesh_state) == MESH_DEACTIVATING)
> + goto out;
> +
> + send_packet(forw_packet);
> +
> + /**
> + * we have to have at least one packet in the queue
> + * to determine the queues wake up time unless we are
> + * shutting down
> + */
> + if (forw_packet->own)
> + schedule_own_packet(forw_packet->if_incoming);
> +
> +out:
> + /* don't count own packet */
> + if (!forw_packet->own)
> + atomic_inc(&bat_priv->batman_queue_left);
> +
> + forw_packet_free(forw_packet);
> +}
> +
> +void purge_outstanding_packets(struct bat_priv *bat_priv,
> + struct batman_if *batman_if)
> +{
> + struct forw_packet *forw_packet;
> + struct hlist_node *tmp_node, *safe_tmp_node;
> + unsigned long flags;
> +
> + if (batman_if)
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "purge_outstanding_packets(): %s\n",
> + batman_if->net_dev->name);
> + else
> + bat_dbg(DBG_BATMAN, bat_priv,
> + "purge_outstanding_packets()\n");
> +
> + /* free bcast list */
> + spin_lock_irqsave(&bat_priv->forw_bcast_list_lock, flags);
> + hlist_for_each_entry_safe(forw_packet, tmp_node, safe_tmp_node,
> + &bat_priv->forw_bcast_list, list) {
> +
> + /**
> + * if purge_outstanding_packets() was called with an argmument
> + * we delete only packets belonging to the given interface
> + */
> + if ((batman_if) &&
> + (forw_packet->if_incoming != batman_if))
> + continue;
> +
> + spin_unlock_irqrestore(&bat_priv->forw_bcast_list_lock, flags);
> +
> + /**
> + * send_outstanding_bcast_packet() will lock the list to
> + * delete the item from the list
> + */
> + cancel_delayed_work_sync(&forw_packet->delayed_work);
> + spin_lock_irqsave(&bat_priv->forw_bcast_list_lock, flags);
> + }
> + spin_unlock_irqrestore(&bat_priv->forw_bcast_list_lock, flags);
> +
> + /* free batman packet list */
> + spin_lock_irqsave(&bat_priv->forw_bat_list_lock, flags);
> + hlist_for_each_entry_safe(forw_packet, tmp_node, safe_tmp_node,
> + &bat_priv->forw_bat_list, list) {
> +
> + /**
> + * if purge_outstanding_packets() was called with an argmument
> + * we delete only packets belonging to the given interface
> + */
> + if ((batman_if) &&
> + (forw_packet->if_incoming != batman_if))
> + continue;
> +
> + spin_unlock_irqrestore(&bat_priv->forw_bat_list_lock, flags);
> +
> + /**
> + * send_outstanding_bat_packet() will lock the list to
> + * delete the item from the list
> + */
> + cancel_delayed_work_sync(&forw_packet->delayed_work);
> + spin_lock_irqsave(&bat_priv->forw_bat_list_lock, flags);
> + }
> + spin_unlock_irqrestore(&bat_priv->forw_bat_list_lock, flags);
> +}
> diff --git a/net/batman-adv/send.h b/net/batman-adv/send.h
> new file mode 100644
> index 0000000..c4cefa8
> --- /dev/null
> +++ b/net/batman-adv/send.h
> @@ -0,0 +1,41 @@
> +/*
> + * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner, Simon Wunderlich
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#ifndef _NET_BATMAN_ADV_SEND_H_
> +#define _NET_BATMAN_ADV_SEND_H_
> +
> +#include "types.h"
> +
> +int send_skb_packet(struct sk_buff *skb,
> + struct batman_if *batman_if,
> + uint8_t *dst_addr);
> +void schedule_own_packet(struct batman_if *batman_if);
> +void schedule_forward_packet(struct orig_node *orig_node,
> + struct ethhdr *ethhdr,
> + struct batman_packet *batman_packet,
> + uint8_t directlink, int hna_buff_len,
> + struct batman_if *if_outgoing);
> +int add_bcast_packet_to_list(struct bat_priv *bat_priv, struct sk_buff *skb);
> +void send_outstanding_bat_packet(struct work_struct *work);
> +void purge_outstanding_packets(struct bat_priv *bat_priv,
> + struct batman_if *batman_if);
> +
> +#endif /* _NET_BATMAN_ADV_SEND_H_ */
> diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c
> new file mode 100644
> index 0000000..8d14343
> --- /dev/null
> +++ b/net/batman-adv/soft-interface.c
> @@ -0,0 +1,395 @@
> +/*
> + * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner, Simon Wunderlich
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#include "main.h"
> +#include "soft-interface.h"
> +#include "hard-interface.h"
> +#include "routing.h"
> +#include "send.h"
> +#include "bat_debugfs.h"
> +#include "translation-table.h"
> +#include "types.h"
> +#include "hash.h"
> +#include "send.h"
> +#include "bat_sysfs.h"
> +#include <linux/slab.h>
> +#include <linux/ethtool.h>
> +#include <linux/etherdevice.h>
> +#include "unicast.h"
> +
> +
> +static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd);
> +static void bat_get_drvinfo(struct net_device *dev,
> + struct ethtool_drvinfo *info);
> +static u32 bat_get_msglevel(struct net_device *dev);
> +static void bat_set_msglevel(struct net_device *dev, u32 value);
> +static u32 bat_get_link(struct net_device *dev);
> +static u32 bat_get_rx_csum(struct net_device *dev);
> +static int bat_set_rx_csum(struct net_device *dev, u32 data);
> +
> +static const struct ethtool_ops bat_ethtool_ops = {
> + .get_settings = bat_get_settings,
> + .get_drvinfo = bat_get_drvinfo,
> + .get_msglevel = bat_get_msglevel,
> + .set_msglevel = bat_set_msglevel,
> + .get_link = bat_get_link,
> + .get_rx_csum = bat_get_rx_csum,
> + .set_rx_csum = bat_set_rx_csum
> +};
> +
> +int my_skb_head_push(struct sk_buff *skb, unsigned int len)
> +{
> + int result;
> +
> + /**
> + * TODO: We must check if we can release all references to non-payload
> + * data using skb_header_release in our skbs to allow skb_cow_header to
> + * work optimally. This means that those skbs are not allowed to read
> + * or write any data which is before the current position of skb->data
> + * after that call and thus allow other skbs with the same data buffer
> + * to write freely in that area.
> + */
> + result = skb_cow_head(skb, len);
> + if (result < 0)
> + return result;
> +
> + skb_push(skb, len);
> + return 0;
> +}
> +
> +static int interface_open(struct net_device *dev)
> +{
> + netif_start_queue(dev);
> + return 0;
> +}
> +
> +static int interface_release(struct net_device *dev)
> +{
> + netif_stop_queue(dev);
> + return 0;
> +}
> +
> +static struct net_device_stats *interface_stats(struct net_device *dev)
> +{
> + struct bat_priv *bat_priv = netdev_priv(dev);
> + return &bat_priv->stats;
> +}
> +
> +static int interface_set_mac_addr(struct net_device *dev, void *p)
> +{
> + struct bat_priv *bat_priv = netdev_priv(dev);
> + struct sockaddr *addr = p;
> +
> + if (!is_valid_ether_addr(addr->sa_data))
> + return -EADDRNOTAVAIL;
> +
> + /* only modify hna-table if it has been initialised before */
> + if (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE) {
> + hna_local_remove(bat_priv, dev->dev_addr,
> + "mac address changed");
> + hna_local_add(dev, addr->sa_data);
> + }
> +
> + memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
> +
> + return 0;
> +}
> +
> +static int interface_change_mtu(struct net_device *dev, int new_mtu)
> +{
> + /* check ranges */
> + if ((new_mtu < 68) || (new_mtu > hardif_min_mtu(dev)))
> + return -EINVAL;
> +
> + dev->mtu = new_mtu;
> +
> + return 0;
> +}
> +
> +int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
> +{
> + struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
> + struct bat_priv *bat_priv = netdev_priv(soft_iface);
> + struct bcast_packet *bcast_packet;
> + int data_len = skb->len, ret;
> +
> + if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE)
> + goto dropped;
> +
> + soft_iface->trans_start = jiffies;
> +
> + /* TODO: check this for locks */
> + hna_local_add(soft_iface, ethhdr->h_source);
> +
> + /* ethernet packet should be broadcasted */
> + if (is_bcast(ethhdr->h_dest) || is_mcast(ethhdr->h_dest)) {
> + if (!bat_priv->primary_if)
> + goto dropped;
> +
> + if (my_skb_head_push(skb, sizeof(struct bcast_packet)) < 0)
> + goto dropped;
> +
> + bcast_packet = (struct bcast_packet *)skb->data;
> + bcast_packet->version = COMPAT_VERSION;
> + bcast_packet->ttl = TTL;
> +
> + /* batman packet type: broadcast */
> + bcast_packet->packet_type = BAT_BCAST;
> +
> + /* hw address of first interface is the orig mac because only
> + * this mac is known throughout the mesh */
> + memcpy(bcast_packet->orig,
> + bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
> +
> + /* set broadcast sequence number */
> + bcast_packet->seqno =
> + htonl(atomic_inc_return(&bat_priv->bcast_seqno));
> +
> + add_bcast_packet_to_list(bat_priv, skb);
> +
> + /* a copy is stored in the bcast list, therefore removing
> + * the original skb. */
> + kfree_skb(skb);
> +
> + /* unicast packet */
> + } else {
> + ret = unicast_send_skb(skb, bat_priv);
> + if (ret != 0)
> + goto dropped_freed;
> + }
> +
> + bat_priv->stats.tx_packets++;
> + bat_priv->stats.tx_bytes += data_len;
> + goto end;
> +
> +dropped:
> + kfree_skb(skb);
> +dropped_freed:
> + bat_priv->stats.tx_dropped++;
> +end:
> + return NETDEV_TX_OK;
> +}
> +
> +void interface_rx(struct net_device *soft_iface,
> + struct sk_buff *skb, int hdr_size)
> +{
> + struct bat_priv *priv = netdev_priv(soft_iface);
> +
> + /* check if enough space is available for pulling, and pull */
> + if (!pskb_may_pull(skb, hdr_size)) {
> + kfree_skb(skb);
> + return;
> + }
> + skb_pull_rcsum(skb, hdr_size);
> +/* skb_set_mac_header(skb, -sizeof(struct ethhdr));*/
> +
> + skb->dev = soft_iface;
> + skb->protocol = eth_type_trans(skb, soft_iface);
> +
> + /* should not be neccesary anymore as we use skb_pull_rcsum()
> + * TODO: please verify this and remove this TODO
> + * -- Dec 21st 2009, Simon Wunderlich */
> +
> +/* skb->ip_summed = CHECKSUM_UNNECESSARY;*/
> +
> + /* TODO: set skb->pkt_type to PACKET_BROADCAST, PACKET_MULTICAST,
> + * PACKET_OTHERHOST or PACKET_HOST */
> +
> + priv->stats.rx_packets++;
> + priv->stats.rx_bytes += skb->len + sizeof(struct ethhdr);
> +
> + soft_iface->last_rx = jiffies;
> +
> + netif_rx(skb);
> +}
> +
> +#ifdef HAVE_NET_DEVICE_OPS
> +static const struct net_device_ops bat_netdev_ops = {
> + .ndo_open = interface_open,
> + .ndo_stop = interface_release,
> + .ndo_get_stats = interface_stats,
> + .ndo_set_mac_address = interface_set_mac_addr,
> + .ndo_change_mtu = interface_change_mtu,
> + .ndo_start_xmit = interface_tx,
> + .ndo_validate_addr = eth_validate_addr
> +};
> +#endif
> +
> +static void interface_setup(struct net_device *dev)
> +{
> + struct bat_priv *priv = netdev_priv(dev);
> + char dev_addr[ETH_ALEN];
> +
> + ether_setup(dev);
> +
> +#ifdef HAVE_NET_DEVICE_OPS
> + dev->netdev_ops = &bat_netdev_ops;
> +#else
> + dev->open = interface_open;
> + dev->stop = interface_release;
> + dev->get_stats = interface_stats;
> + dev->set_mac_address = interface_set_mac_addr;
> + dev->change_mtu = interface_change_mtu;
> + dev->hard_start_xmit = interface_tx;
> +#endif
> + dev->destructor = free_netdev;
> +
> + /**
> + * can't call min_mtu, because the needed variables
> + * have not been initialized yet
> + */
> + dev->mtu = ETH_DATA_LEN;
> + dev->hard_header_len = BAT_HEADER_LEN; /* reserve more space in the
> + * skbuff for our header */
> +
> + /* generate random address */
> + random_ether_addr(dev_addr);
> + memcpy(dev->dev_addr, dev_addr, ETH_ALEN);
> +
> + SET_ETHTOOL_OPS(dev, &bat_ethtool_ops);
> +
> + memset(priv, 0, sizeof(struct bat_priv));
> +}
> +
> +struct net_device *softif_create(char *name)
> +{
> + struct net_device *soft_iface;
> + struct bat_priv *bat_priv;
> + int ret;
> +
> + soft_iface = alloc_netdev(sizeof(struct bat_priv) , name,
> + interface_setup);
> +
> + if (!soft_iface) {
> + pr_err("Unable to allocate the batman interface: %s\n", name);
> + goto out;
> + }
> +
> + ret = register_netdev(soft_iface);
> + if (ret < 0) {
> + pr_err("Unable to register the batman interface '%s': %i\n",
> + name, ret);
> + goto free_soft_iface;
> + }
> +
> + bat_priv = netdev_priv(soft_iface);
> +
> + atomic_set(&bat_priv->aggregation_enabled, 1);
> + atomic_set(&bat_priv->bonding_enabled, 0);
> + atomic_set(&bat_priv->vis_mode, VIS_TYPE_CLIENT_UPDATE);
> + atomic_set(&bat_priv->orig_interval, 1000);
> + atomic_set(&bat_priv->log_level, 0);
> + atomic_set(&bat_priv->frag_enabled, 1);
> + atomic_set(&bat_priv->bcast_queue_left, BCAST_QUEUE_LEN);
> + atomic_set(&bat_priv->batman_queue_left, BATMAN_QUEUE_LEN);
> +
> + atomic_set(&bat_priv->mesh_state, MESH_INACTIVE);
> + atomic_set(&bat_priv->bcast_seqno, 1);
> + atomic_set(&bat_priv->hna_local_changed, 0);
> +
> + bat_priv->primary_if = NULL;
> + bat_priv->num_ifaces = 0;
> +
> + ret = sysfs_add_meshif(soft_iface);
> + if (ret < 0)
> + goto unreg_soft_iface;
> +
> + ret = debugfs_add_meshif(soft_iface);
> + if (ret < 0)
> + goto unreg_sysfs;
> +
> + ret = mesh_init(soft_iface);
> + if (ret < 0)
> + goto unreg_debugfs;
> +
> + return soft_iface;
> +
> +unreg_debugfs:
> + debugfs_del_meshif(soft_iface);
> +unreg_sysfs:
> + sysfs_del_meshif(soft_iface);
> +unreg_soft_iface:
> + unregister_netdev(soft_iface);
> + return NULL;
> +
> +free_soft_iface:
> + free_netdev(soft_iface);
> +out:
> + return NULL;
> +}
> +
> +void softif_destroy(struct net_device *soft_iface)
> +{
> + debugfs_del_meshif(soft_iface);
> + sysfs_del_meshif(soft_iface);
> + mesh_free(soft_iface);
> + unregister_netdevice(soft_iface);
> +}
> +
> +/* ethtool */
> +static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
> +{
> + cmd->supported = 0;
> + cmd->advertising = 0;
> + cmd->speed = SPEED_10;
> + cmd->duplex = DUPLEX_FULL;
> + cmd->port = PORT_TP;
> + cmd->phy_address = 0;
> + cmd->transceiver = XCVR_INTERNAL;
> + cmd->autoneg = AUTONEG_DISABLE;
> + cmd->maxtxpkt = 0;
> + cmd->maxrxpkt = 0;
> +
> + return 0;
> +}
> +
> +static void bat_get_drvinfo(struct net_device *dev,
> + struct ethtool_drvinfo *info)
> +{
> + strcpy(info->driver, "B.A.T.M.A.N. advanced");
> + strcpy(info->version, SOURCE_VERSION);
> + strcpy(info->fw_version, "N/A");
> + strcpy(info->bus_info, "batman");
> +}
> +
> +static u32 bat_get_msglevel(struct net_device *dev)
> +{
> + return -EOPNOTSUPP;
> +}
> +
> +static void bat_set_msglevel(struct net_device *dev, u32 value)
> +{
> +}
> +
> +static u32 bat_get_link(struct net_device *dev)
> +{
> + return 1;
> +}
> +
> +static u32 bat_get_rx_csum(struct net_device *dev)
> +{
> + return 0;
> +}
> +
> +static int bat_set_rx_csum(struct net_device *dev, u32 data)
> +{
> + return -EOPNOTSUPP;
> +}
> diff --git a/net/batman-adv/soft-interface.h b/net/batman-adv/soft-interface.h
> new file mode 100644
> index 0000000..843a7ec
> --- /dev/null
> +++ b/net/batman-adv/soft-interface.h
> @@ -0,0 +1,32 @@
> +/*
> + * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#ifndef _NET_BATMAN_ADV_SOFT_INTERFACE_H_
> +#define _NET_BATMAN_ADV_SOFT_INTERFACE_H_
> +
> +int my_skb_head_push(struct sk_buff *skb, unsigned int len);
> +int interface_tx(struct sk_buff *skb, struct net_device *soft_iface);
> +void interface_rx(struct net_device *soft_iface,
> + struct sk_buff *skb, int hdr_size);
> +struct net_device *softif_create(char *name);
> +void softif_destroy(struct net_device *soft_iface);
> +
> +#endif /* _NET_BATMAN_ADV_SOFT_INTERFACE_H_ */
> diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
> new file mode 100644
> index 0000000..12b2325
> --- /dev/null
> +++ b/net/batman-adv/translation-table.c
> @@ -0,0 +1,513 @@
> +/*
> + * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner, Simon Wunderlich
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#include "main.h"
> +#include "translation-table.h"
> +#include "soft-interface.h"
> +#include "types.h"
> +#include "hash.h"
> +
> +static void hna_local_purge(struct work_struct *work);
> +static void _hna_global_del_orig(struct bat_priv *bat_priv,
> + struct hna_global_entry *hna_global_entry,
> + char *message);
> +
> +static void hna_local_start_timer(struct bat_priv *bat_priv)
> +{
> + INIT_DELAYED_WORK(&bat_priv->hna_work, hna_local_purge);
> + queue_delayed_work(bat_event_workqueue, &bat_priv->hna_work, 10 * HZ);
> +}
> +
> +int hna_local_init(struct bat_priv *bat_priv)
> +{
> + if (bat_priv->hna_local_hash)
> + return 1;
> +
> + bat_priv->hna_local_hash = hash_new(128, compare_orig, choose_orig);
> +
> + if (!bat_priv->hna_local_hash)
> + return 0;
> +
> + atomic_set(&bat_priv->hna_local_changed, 0);
> + hna_local_start_timer(bat_priv);
> +
> + return 1;
> +}
> +
> +void hna_local_add(struct net_device *soft_iface, uint8_t *addr)
> +{
> + struct bat_priv *bat_priv = netdev_priv(soft_iface);
> + struct hna_local_entry *hna_local_entry;
> + struct hna_global_entry *hna_global_entry;
> + struct hashtable_t *swaphash;
> + unsigned long flags;
> +
> + spin_lock_irqsave(&bat_priv->hna_lhash_lock, flags);
> + hna_local_entry =
> + ((struct hna_local_entry *)hash_find(bat_priv->hna_local_hash,
> + addr));
> + spin_unlock_irqrestore(&bat_priv->hna_lhash_lock, flags);
> +
> + if (hna_local_entry) {
> + hna_local_entry->last_seen = jiffies;
> + return;
> + }
> +
> + /* only announce as many hosts as possible in the batman-packet and
> + space in batman_packet->num_hna That also should give a limit to
> + MAC-flooding. */
> + if ((bat_priv->num_local_hna + 1 > (ETH_DATA_LEN - BAT_PACKET_LEN)
> + / ETH_ALEN) ||
> + (bat_priv->num_local_hna + 1 > 255)) {
> + bat_dbg(DBG_ROUTES, bat_priv,
> + "Can't add new local hna entry (%pM): "
> + "number of local hna entries exceeds packet size\n",
> + addr);
> + return;
> + }
> +
> + bat_dbg(DBG_ROUTES, bat_priv,
> + "Creating new local hna entry: %pM\n", addr);
> +
> + hna_local_entry = kmalloc(sizeof(struct hna_local_entry), GFP_ATOMIC);
> + if (!hna_local_entry)
> + return;
> +
> + memcpy(hna_local_entry->addr, addr, ETH_ALEN);
> + hna_local_entry->last_seen = jiffies;
> +
> + /* the batman interface mac address should never be purged */
> + if (compare_orig(addr, soft_iface->dev_addr))
> + hna_local_entry->never_purge = 1;
> + else
> + hna_local_entry->never_purge = 0;
> +
> + spin_lock_irqsave(&bat_priv->hna_lhash_lock, flags);
> +
> + hash_add(bat_priv->hna_local_hash, hna_local_entry);
> + bat_priv->num_local_hna++;
> + atomic_set(&bat_priv->hna_local_changed, 1);
> +
> + if (bat_priv->hna_local_hash->elements * 4 >
> + bat_priv->hna_local_hash->size) {
> + swaphash = hash_resize(bat_priv->hna_local_hash,
> + bat_priv->hna_local_hash->size * 2);
> +
> + if (!swaphash)
> + pr_err("Couldn't resize local hna hash table\n");
> + else
> + bat_priv->hna_local_hash = swaphash;
> + }
> +
> + spin_unlock_irqrestore(&bat_priv->hna_lhash_lock, flags);
> +
> + /* remove address from global hash if present */
> + spin_lock_irqsave(&bat_priv->hna_ghash_lock, flags);
> +
> + hna_global_entry = ((struct hna_global_entry *)
> + hash_find(bat_priv->hna_global_hash, addr));
> +
> + if (hna_global_entry)
> + _hna_global_del_orig(bat_priv, hna_global_entry,
> + "local hna received");
> +
> + spin_unlock_irqrestore(&bat_priv->hna_ghash_lock, flags);
> +}
> +
> +int hna_local_fill_buffer(struct bat_priv *bat_priv,
> + unsigned char *buff, int buff_len)
> +{
> + struct hna_local_entry *hna_local_entry;
> + HASHIT(hashit);
> + int i = 0;
> + unsigned long flags;
> +
> + spin_lock_irqsave(&bat_priv->hna_lhash_lock, flags);
> +
> + while (hash_iterate(bat_priv->hna_local_hash, &hashit)) {
> +
> + if (buff_len < (i + 1) * ETH_ALEN)
> + break;
> +
> + hna_local_entry = hashit.bucket->data;
> + memcpy(buff + (i * ETH_ALEN), hna_local_entry->addr, ETH_ALEN);
> +
> + i++;
> + }
> +
> + /* if we did not get all new local hnas see you next time ;-) */
> + if (i == bat_priv->num_local_hna)
> + atomic_set(&bat_priv->hna_local_changed, 0);
> +
> + spin_unlock_irqrestore(&bat_priv->hna_lhash_lock, flags);
> + return i;
> +}
> +
> +int hna_local_seq_print_text(struct seq_file *seq, void *offset)
> +{
> + struct net_device *net_dev = (struct net_device *)seq->private;
> + struct bat_priv *bat_priv = netdev_priv(net_dev);
> + struct hna_local_entry *hna_local_entry;
> + HASHIT(hashit);
> + HASHIT(hashit_count);
> + unsigned long flags;
> + size_t buf_size, pos;
> + char *buff;
> +
> + if (!bat_priv->primary_if) {
> + return seq_printf(seq, "BATMAN mesh %s disabled - "
> + "please specify interfaces to enable it\n",
> + net_dev->name);
> + }
> +
> + seq_printf(seq, "Locally retrieved addresses (from %s) "
> + "announced via HNA:\n",
> + net_dev->name);
> +
> + spin_lock_irqsave(&bat_priv->hna_lhash_lock, flags);
> +
> + buf_size = 1;
> + /* Estimate length for: " * xx:xx:xx:xx:xx:xx\n" */
> + while (hash_iterate(bat_priv->hna_local_hash, &hashit_count))
> + buf_size += 21;
> +
> + buff = kmalloc(buf_size, GFP_ATOMIC);
> + if (!buff) {
> + spin_unlock_irqrestore(&bat_priv->hna_lhash_lock, flags);
> + return -ENOMEM;
> + }
> + buff[0] = '\0';
> + pos = 0;
> +
> + while (hash_iterate(bat_priv->hna_local_hash, &hashit)) {
> + hna_local_entry = hashit.bucket->data;
> +
> + pos += snprintf(buff + pos, 22, " * %pM\n",
> + hna_local_entry->addr);
> + }
> +
> + spin_unlock_irqrestore(&bat_priv->hna_lhash_lock, flags);
> +
> + seq_printf(seq, "%s", buff);
> + kfree(buff);
> + return 0;
> +}
> +
> +static void _hna_local_del(void *data, void *arg)
> +{
> + struct bat_priv *bat_priv = (struct bat_priv *)arg;
> +
> + kfree(data);
> + bat_priv->num_local_hna--;
> + atomic_set(&bat_priv->hna_local_changed, 1);
> +}
> +
> +static void hna_local_del(struct bat_priv *bat_priv,
> + struct hna_local_entry *hna_local_entry,
> + char *message)
> +{
> + bat_dbg(DBG_ROUTES, bat_priv, "Deleting local hna entry (%pM): %s\n",
> + hna_local_entry->addr, message);
> +
> + hash_remove(bat_priv->hna_local_hash, hna_local_entry->addr);
> + _hna_local_del(hna_local_entry, bat_priv);
> +}
> +
> +void hna_local_remove(struct bat_priv *bat_priv,
> + uint8_t *addr, char *message)
> +{
> + struct hna_local_entry *hna_local_entry;
> + unsigned long flags;
> +
> + spin_lock_irqsave(&bat_priv->hna_lhash_lock, flags);
> +
> + hna_local_entry = (struct hna_local_entry *)
> + hash_find(bat_priv->hna_local_hash, addr);
> + if (hna_local_entry)
> + hna_local_del(bat_priv, hna_local_entry, message);
> +
> + spin_unlock_irqrestore(&bat_priv->hna_lhash_lock, flags);
> +}
> +
> +static void hna_local_purge(struct work_struct *work)
> +{
> + struct delayed_work *delayed_work =
> + container_of(work, struct delayed_work, work);
> + struct bat_priv *bat_priv =
> + container_of(delayed_work, struct bat_priv, hna_work);
> + struct hna_local_entry *hna_local_entry;
> + HASHIT(hashit);
> + unsigned long flags;
> + unsigned long timeout;
> +
> + spin_lock_irqsave(&bat_priv->hna_lhash_lock, flags);
> +
> + while (hash_iterate(bat_priv->hna_local_hash, &hashit)) {
> + hna_local_entry = hashit.bucket->data;
> +
> + timeout = hna_local_entry->last_seen + LOCAL_HNA_TIMEOUT * HZ;
> +
> + if ((!hna_local_entry->never_purge) &&
> + time_after(jiffies, timeout))
> + hna_local_del(bat_priv, hna_local_entry,
> + "address timed out");
> + }
> +
> + spin_unlock_irqrestore(&bat_priv->hna_lhash_lock, flags);
> + hna_local_start_timer(bat_priv);
> +}
> +
> +void hna_local_free(struct bat_priv *bat_priv)
> +{
> + if (!bat_priv->hna_local_hash)
> + return;
> +
> + cancel_delayed_work_sync(&bat_priv->hna_work);
> + hash_delete(bat_priv->hna_local_hash, _hna_local_del, bat_priv);
> + bat_priv->hna_local_hash = NULL;
> +}
> +
> +int hna_global_init(struct bat_priv *bat_priv)
> +{
> + if (bat_priv->hna_global_hash)
> + return 1;
> +
> + bat_priv->hna_global_hash = hash_new(128, compare_orig, choose_orig);
> +
> + if (!bat_priv->hna_global_hash)
> + return 0;
> +
> + return 1;
> +}
> +
> +void hna_global_add_orig(struct bat_priv *bat_priv,
> + struct orig_node *orig_node,
> + unsigned char *hna_buff, int hna_buff_len)
> +{
> + struct hna_global_entry *hna_global_entry;
> + struct hna_local_entry *hna_local_entry;
> + struct hashtable_t *swaphash;
> + int hna_buff_count = 0;
> + unsigned long flags;
> + unsigned char *hna_ptr;
> +
> + while ((hna_buff_count + 1) * ETH_ALEN <= hna_buff_len) {
> + spin_lock_irqsave(&bat_priv->hna_ghash_lock, flags);
> +
> + hna_ptr = hna_buff + (hna_buff_count * ETH_ALEN);
> + hna_global_entry = (struct hna_global_entry *)
> + hash_find(bat_priv->hna_global_hash, hna_ptr);
> +
> + if (!hna_global_entry) {
> + spin_unlock_irqrestore(&bat_priv->hna_ghash_lock,
> + flags);
> +
> + hna_global_entry =
> + kmalloc(sizeof(struct hna_global_entry),
> + GFP_ATOMIC);
> +
> + if (!hna_global_entry)
> + break;
> +
> + memcpy(hna_global_entry->addr, hna_ptr, ETH_ALEN);
> +
> + bat_dbg(DBG_ROUTES, bat_priv,
> + "Creating new global hna entry: "
> + "%pM (via %pM)\n",
> + hna_global_entry->addr, orig_node->orig);
> +
> + spin_lock_irqsave(&bat_priv->hna_ghash_lock, flags);
> + hash_add(bat_priv->hna_global_hash, hna_global_entry);
> +
> + }
> +
> + hna_global_entry->orig_node = orig_node;
> + spin_unlock_irqrestore(&bat_priv->hna_ghash_lock, flags);
> +
> + /* remove address from local hash if present */
> + spin_lock_irqsave(&bat_priv->hna_lhash_lock, flags);
> +
> + hna_ptr = hna_buff + (hna_buff_count * ETH_ALEN);
> + hna_local_entry = (struct hna_local_entry *)
> + hash_find(bat_priv->hna_local_hash, hna_ptr);
> +
> + if (hna_local_entry)
> + hna_local_del(bat_priv, hna_local_entry,
> + "global hna received");
> +
> + spin_unlock_irqrestore(&bat_priv->hna_lhash_lock, flags);
> +
> + hna_buff_count++;
> + }
> +
> + /* initialize, and overwrite if malloc succeeds */
> + orig_node->hna_buff = NULL;
> + orig_node->hna_buff_len = 0;
> +
> + if (hna_buff_len > 0) {
> + orig_node->hna_buff = kmalloc(hna_buff_len, GFP_ATOMIC);
> + if (orig_node->hna_buff) {
> + memcpy(orig_node->hna_buff, hna_buff, hna_buff_len);
> + orig_node->hna_buff_len = hna_buff_len;
> + }
> + }
> +
> + spin_lock_irqsave(&bat_priv->hna_ghash_lock, flags);
> +
> + if (bat_priv->hna_global_hash->elements * 4 >
> + bat_priv->hna_global_hash->size) {
> + swaphash = hash_resize(bat_priv->hna_global_hash,
> + bat_priv->hna_global_hash->size * 2);
> +
> + if (!swaphash)
> + pr_err("Couldn't resize global hna hash table\n");
> + else
> + bat_priv->hna_global_hash = swaphash;
> + }
> +
> + spin_unlock_irqrestore(&bat_priv->hna_ghash_lock, flags);
> +}
> +
> +int hna_global_seq_print_text(struct seq_file *seq, void *offset)
> +{
> + struct net_device *net_dev = (struct net_device *)seq->private;
> + struct bat_priv *bat_priv = netdev_priv(net_dev);
> + struct hna_global_entry *hna_global_entry;
> + HASHIT(hashit);
> + HASHIT(hashit_count);
> + unsigned long flags;
> + size_t buf_size, pos;
> + char *buff;
> +
> + if (!bat_priv->primary_if) {
> + return seq_printf(seq, "BATMAN mesh %s disabled - "
> + "please specify interfaces to enable it\n",
> + net_dev->name);
> + }
> +
> + seq_printf(seq, "Globally announced HNAs received via the mesh %s\n",
> + net_dev->name);
> +
> + spin_lock_irqsave(&bat_priv->hna_ghash_lock, flags);
> +
> + buf_size = 1;
> + /* Estimate length for: " * xx:xx:xx:xx:xx:xx via xx:xx:xx:xx:xx:xx\n"*/
> + while (hash_iterate(bat_priv->hna_global_hash, &hashit_count))
> + buf_size += 43;
> +
> + buff = kmalloc(buf_size, GFP_ATOMIC);
> + if (!buff) {
> + spin_unlock_irqrestore(&bat_priv->hna_ghash_lock, flags);
> + return -ENOMEM;
> + }
> + buff[0] = '\0';
> + pos = 0;
> +
> + while (hash_iterate(bat_priv->hna_global_hash, &hashit)) {
> + hna_global_entry = hashit.bucket->data;
> +
> + pos += snprintf(buff + pos, 44,
> + " * %pM via %pM\n", hna_global_entry->addr,
> + hna_global_entry->orig_node->orig);
> + }
> +
> + spin_unlock_irqrestore(&bat_priv->hna_ghash_lock, flags);
> +
> + seq_printf(seq, "%s", buff);
> + kfree(buff);
> + return 0;
> +}
> +
> +static void _hna_global_del_orig(struct bat_priv *bat_priv,
> + struct hna_global_entry *hna_global_entry,
> + char *message)
> +{
> + bat_dbg(DBG_ROUTES, bat_priv,
> + "Deleting global hna entry %pM (via %pM): %s\n",
> + hna_global_entry->addr, hna_global_entry->orig_node->orig,
> + message);
> +
> + hash_remove(bat_priv->hna_global_hash, hna_global_entry->addr);
> + kfree(hna_global_entry);
> +}
> +
> +void hna_global_del_orig(struct bat_priv *bat_priv,
> + struct orig_node *orig_node, char *message)
> +{
> + struct hna_global_entry *hna_global_entry;
> + int hna_buff_count = 0;
> + unsigned long flags;
> + unsigned char *hna_ptr;
> +
> + if (orig_node->hna_buff_len == 0)
> + return;
> +
> + spin_lock_irqsave(&bat_priv->hna_ghash_lock, flags);
> +
> + while ((hna_buff_count + 1) * ETH_ALEN <= orig_node->hna_buff_len) {
> + hna_ptr = orig_node->hna_buff + (hna_buff_count * ETH_ALEN);
> + hna_global_entry = (struct hna_global_entry *)
> + hash_find(bat_priv->hna_global_hash, hna_ptr);
> +
> + if ((hna_global_entry) &&
> + (hna_global_entry->orig_node == orig_node))
> + _hna_global_del_orig(bat_priv, hna_global_entry,
> + message);
> +
> + hna_buff_count++;
> + }
> +
> + spin_unlock_irqrestore(&bat_priv->hna_ghash_lock, flags);
> +
> + orig_node->hna_buff_len = 0;
> + kfree(orig_node->hna_buff);
> + orig_node->hna_buff = NULL;
> +}
> +
> +static void hna_global_del(void *data, void *arg)
> +{
> + kfree(data);
> +}
> +
> +void hna_global_free(struct bat_priv *bat_priv)
> +{
> + if (!bat_priv->hna_global_hash)
> + return;
> +
> + hash_delete(bat_priv->hna_global_hash, hna_global_del, NULL);
> + bat_priv->hna_global_hash = NULL;
> +}
> +
> +struct orig_node *transtable_search(struct bat_priv *bat_priv, uint8_t *addr)
> +{
> + struct hna_global_entry *hna_global_entry;
> + unsigned long flags;
> +
> + spin_lock_irqsave(&bat_priv->hna_ghash_lock, flags);
> + hna_global_entry = (struct hna_global_entry *)
> + hash_find(bat_priv->hna_global_hash, addr);
> + spin_unlock_irqrestore(&bat_priv->hna_ghash_lock, flags);
> +
> + if (!hna_global_entry)
> + return NULL;
> +
> + return hna_global_entry->orig_node;
> +}
> diff --git a/net/batman-adv/translation-table.h b/net/batman-adv/translation-table.h
> new file mode 100644
> index 0000000..10c4c5c
> --- /dev/null
> +++ b/net/batman-adv/translation-table.h
> @@ -0,0 +1,45 @@
> +/*
> + * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner, Simon Wunderlich
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#ifndef _NET_BATMAN_ADV_TRANSLATION_TABLE_H_
> +#define _NET_BATMAN_ADV_TRANSLATION_TABLE_H_
> +
> +#include "types.h"
> +
> +int hna_local_init(struct bat_priv *bat_priv);
> +void hna_local_add(struct net_device *soft_iface, uint8_t *addr);
> +void hna_local_remove(struct bat_priv *bat_priv,
> + uint8_t *addr, char *message);
> +int hna_local_fill_buffer(struct bat_priv *bat_priv,
> + unsigned char *buff, int buff_len);
> +int hna_local_seq_print_text(struct seq_file *seq, void *offset);
> +void hna_local_free(struct bat_priv *bat_priv);
> +int hna_global_init(struct bat_priv *bat_priv);
> +void hna_global_add_orig(struct bat_priv *bat_priv,
> + struct orig_node *orig_node,
> + unsigned char *hna_buff, int hna_buff_len);
> +int hna_global_seq_print_text(struct seq_file *seq, void *offset);
> +void hna_global_del_orig(struct bat_priv *bat_priv,
> + struct orig_node *orig_node, char *message);
> +void hna_global_free(struct bat_priv *bat_priv);
> +struct orig_node *transtable_search(struct bat_priv *bat_priv, uint8_t *addr);
> +
> +#endif /* _NET_BATMAN_ADV_TRANSLATION_TABLE_H_ */
> diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h
> new file mode 100644
> index 0000000..e779c4a
> --- /dev/null
> +++ b/net/batman-adv/types.h
> @@ -0,0 +1,244 @@
> +/*
> + * Copyright (C) 2007-2010 B.A.T.M.A.N. contributors:
> + *
> + * Marek Lindner, Simon Wunderlich
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +
> +
> +#ifndef _NET_BATMAN_ADV_TYPES_H_
> +#define _NET_BATMAN_ADV_TYPES_H_
> +
> +#include "packet.h"
> +#include "bitarray.h"
> +
> +#define BAT_HEADER_LEN (sizeof(struct ethhdr) + \
> + ((sizeof(struct unicast_packet) > sizeof(struct bcast_packet) ? \
> + sizeof(struct unicast_packet) : \
> + sizeof(struct bcast_packet))))
> +
> +
> +struct batman_if {
> + struct list_head list;
> + int16_t if_num;
> + char if_status;
> + char addr_str[ETH_STR_LEN];
> + struct net_device *net_dev;
> + atomic_t seqno;
> + atomic_t frag_seqno;
> + unsigned char *packet_buff;
> + int packet_len;
> + struct kobject *hardif_obj;
> + struct rcu_head rcu;
> + struct packet_type batman_adv_ptype;
> + struct net_device *soft_iface;
> +};
> +
> +/**
> + * orig_node - structure for orig_list maintaining nodes of mesh
> + * @primary_addr: hosts primary interface address
> + * @last_valid: when last packet from this node was received
> + * @bcast_seqno_reset: time when the broadcast seqno window was reset
> + * @batman_seqno_reset: time when the batman seqno window was reset
> + * @flags: for now only VIS_SERVER flag
> + * @last_real_seqno: last and best known squence number
> + * @last_ttl: ttl of last received packet
> + * @last_bcast_seqno: last broadcast sequence number received by this host
> + *
> + * @candidates: how many candidates are available
> + * @selected: next bonding candidate
> + */
> +struct orig_node {
> + uint8_t orig[ETH_ALEN];
> + uint8_t primary_addr[ETH_ALEN];
> + struct neigh_node *router;
> + TYPE_OF_WORD *bcast_own;
> + uint8_t *bcast_own_sum;
> + uint8_t tq_own;
> + int tq_asym_penalty;
> + unsigned long last_valid;
> + unsigned long bcast_seqno_reset;
> + unsigned long batman_seqno_reset;
> + uint8_t flags;
> + unsigned char *hna_buff;
> + int16_t hna_buff_len;
> + uint32_t last_real_seqno;
> + uint8_t last_ttl;
> + TYPE_OF_WORD bcast_bits[NUM_WORDS];
> + uint32_t last_bcast_seqno;
> + struct list_head neigh_list;
> + struct list_head frag_list;
> + unsigned long last_frag_packet;
> + struct {
> + uint8_t candidates;
> + struct neigh_node *selected;
> + } bond;
> +};
> +
> +/**
> + * neigh_node
> + * @last_valid: when last packet via this neighbor was received
> + */
> +struct neigh_node {
> + struct list_head list;
> + uint8_t addr[ETH_ALEN];
> + uint8_t real_packet_count;
> + uint8_t tq_recv[TQ_GLOBAL_WINDOW_SIZE];
> + uint8_t tq_index;
> + uint8_t tq_avg;
> + uint8_t last_ttl;
> + struct neigh_node *next_bond_candidate;
> + unsigned long last_valid;
> + TYPE_OF_WORD real_bits[NUM_WORDS];
> + struct orig_node *orig_node;
> + struct batman_if *if_incoming;
> +};
> +
> +struct bat_priv {
> + atomic_t mesh_state;
> + struct net_device_stats stats;
> + atomic_t aggregation_enabled;
> + atomic_t bonding_enabled;
> + atomic_t frag_enabled;
> + atomic_t vis_mode;
> + atomic_t orig_interval;
> + atomic_t log_level;
> + atomic_t bcast_seqno;
> + atomic_t bcast_queue_left;
> + atomic_t batman_queue_left;
> + char num_ifaces;
> + struct debug_log *debug_log;
> + struct batman_if *primary_if;
> + struct kobject *mesh_obj;
> + struct dentry *debug_dir;
> + struct hlist_head forw_bat_list;
> + struct hlist_head forw_bcast_list;
> + struct hlist_head gw_list;
> + struct list_head vis_send_list;
> + struct hashtable_t *orig_hash;
> + struct hashtable_t *hna_local_hash;
> + struct hashtable_t *hna_global_hash;
> + struct hashtable_t *vis_hash;
> + spinlock_t orig_hash_lock;
> + spinlock_t forw_bat_list_lock;
> + spinlock_t forw_bcast_list_lock;
> + spinlock_t hna_lhash_lock;
> + spinlock_t hna_ghash_lock;
> + spinlock_t gw_list_lock;
> + spinlock_t vis_hash_lock;
> + spinlock_t vis_list_lock;
> + int16_t num_local_hna;
> + atomic_t hna_local_changed;
> + struct delayed_work hna_work;
> + struct delayed_work orig_work;
> + struct delayed_work vis_work;
> + struct gw_node *curr_gw;
> + struct vis_info *my_vis_info;
> +};
> +
> +struct socket_client {
> + struct list_head queue_list;
> + unsigned int queue_len;
> + unsigned char index;
> + spinlock_t lock;
> + wait_queue_head_t queue_wait;
> + struct bat_priv *bat_priv;
> +};
> +
> +struct socket_packet {
> + struct list_head list;
> + size_t icmp_len;
> + struct icmp_packet_rr icmp_packet;
> +};
> +
> +struct hna_local_entry {
> + uint8_t addr[ETH_ALEN];
> + unsigned long last_seen;
> + char never_purge;
> +};
> +
> +struct hna_global_entry {
> + uint8_t addr[ETH_ALEN];
> + struct orig_node *orig_node;
> +};
> +
> +/**
> + * forw_packet - structure for forw_list maintaining packets to be
> + * send/forwarded
> + */
> +struct forw_packet {
> + struct hlist_node list;
> + unsigned long send_time;
> + uint8_t own;
> + struct sk_buff *skb;
> + uint16_t packet_len;
> + uint32_t direct_link_flags;
> + uint8_t num_packets;
> + struct delayed_work delayed_work;
> + struct batman_if *if_incoming;
> +};
> +
> +/* While scanning for vis-entries of a particular vis-originator
> + * this list collects its interfaces to create a subgraph/cluster
> + * out of them later
> + */
> +struct if_list_entry {
> + uint8_t addr[ETH_ALEN];
> + bool primary;
> + struct hlist_node list;
> +};
> +
> +struct debug_log {
> + char log_buff[LOG_BUF_LEN];
> + unsigned long log_start;
> + unsigned long log_end;
> + spinlock_t lock;
> + wait_queue_head_t queue_wait;
> +};
> +
> +struct frag_packet_list_entry {
> + struct list_head list;
> + uint16_t seqno;
> + struct sk_buff *skb;
> +};
> +
> +struct vis_info {
> + unsigned long first_seen;
> + struct list_head recv_list;
> + /* list of server-neighbors we received a vis-packet
> + * from. we should not reply to them. */
> + struct list_head send_list;
> + struct kref refcount;
> + struct bat_priv *bat_priv;
> + /* this packet might be part of the vis send queue. */
> + struct sk_buff *skb_packet;
> + /* vis_info may follow here*/
> +} __attribute__((packed));
> +
> +struct vis_info_entry {
> + uint8_t src[ETH_ALEN];
> + uint8_t dest[ETH_ALEN];
> + uint8_t quality; /* quality = 0 means HNA */
> +} __attribute__((packed));
> +
> +struct recvlist_node {
> + struct list_head list;
> + uint8_t mac[ETH_ALEN];
> +};
> +
> +#endif /* _NET_BATMAN_ADV_TYPES_H_ */
> diff --git a/net/batman-adv/unicast.c b/net/batman-adv/unicast.c
> new file mode 100644
> index 0000000..f951abc
> --- /dev/null
> +++ b/net/batman-adv/unicast.c
> @@ -0,0 +1,265 @@
> +/*
> + * Copyright (C) 2010 B.A.T.M.A.N. contributors:
> + *
> + * Andreas Langer
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#include "main.h"
> +#include "unicast.h"
> +#include "send.h"
> +#include "soft-interface.h"
> +#include "hash.h"
> +#include "translation-table.h"
> +#include "routing.h"
> +#include "hard-interface.h"
> +
> +
> +struct sk_buff *merge_frag_packet(struct list_head *head,
> + struct frag_packet_list_entry *tfp,
> + struct sk_buff *skb)
> +{
> + struct unicast_frag_packet *up =
> + (struct unicast_frag_packet *)skb->data;
> + struct sk_buff *tmp_skb;
> +
> + /* set skb to the first part and tmp_skb to the second part */
> + if (up->flags & UNI_FRAG_HEAD) {
> + tmp_skb = tfp->skb;
> + } else {
> + tmp_skb = skb;
> + skb = tfp->skb;
> + }
> +
> + skb_pull(tmp_skb, sizeof(struct unicast_frag_packet));
> + if (pskb_expand_head(skb, 0, tmp_skb->len, GFP_ATOMIC) < 0) {
> + /* free buffered skb, skb will be freed later */
> + kfree_skb(tfp->skb);
> + return NULL;
> + }
> +
> + /* move free entry to end */
> + tfp->skb = NULL;
> + tfp->seqno = 0;
> + list_move_tail(&tfp->list, head);
> +
> + memcpy(skb_put(skb, tmp_skb->len), tmp_skb->data, tmp_skb->len);
> + kfree_skb(tmp_skb);
> + return skb;
> +}
> +
> +void create_frag_entry(struct list_head *head, struct sk_buff *skb)
> +{
> + struct frag_packet_list_entry *tfp;
> + struct unicast_frag_packet *up =
> + (struct unicast_frag_packet *)skb->data;
> +
> + /* free and oldest packets stand at the end */
> + tfp = list_entry((head)->prev, typeof(*tfp), list);
> + kfree_skb(tfp->skb);
> +
> + tfp->seqno = ntohs(up->seqno);
> + tfp->skb = skb;
> + list_move(&tfp->list, head);
> + return;
> +}
> +
> +void create_frag_buffer(struct list_head *head)
> +{
> + int i;
> + struct frag_packet_list_entry *tfp;
> +
> + for (i = 0; i < FRAG_BUFFER_SIZE; i++) {
> + tfp = kmalloc(sizeof(struct frag_packet_list_entry),
> + GFP_ATOMIC);
> + tfp->skb = NULL;
> + tfp->seqno = 0;
> + INIT_LIST_HEAD(&tfp->list);
> + list_add(&tfp->list, head);
> + }
> +
> + return;
> +}
> +
> +struct frag_packet_list_entry *search_frag_packet(struct list_head *head,
> + struct unicast_frag_packet *up)
> +{
> + struct frag_packet_list_entry *tfp;
> + struct unicast_frag_packet *tmp_up = NULL;
> + uint16_t search_seqno;
> +
> + if (up->flags & UNI_FRAG_HEAD)
> + search_seqno = ntohs(up->seqno)+1;
> + else
> + search_seqno = ntohs(up->seqno)-1;
> +
> + list_for_each_entry(tfp, head, list) {
> +
> + if (!tfp->skb)
> + continue;
> +
> + if (tfp->seqno == ntohs(up->seqno))
> + goto mov_tail;
> +
> + tmp_up = (struct unicast_frag_packet *)tfp->skb->data;
> +
> + if (tfp->seqno == search_seqno) {
> +
> + if ((tmp_up->flags & UNI_FRAG_HEAD) !=
> + (up->flags & UNI_FRAG_HEAD))
> + return tfp;
> + else
> + goto mov_tail;
> + }
> + }
> + return NULL;
> +
> +mov_tail:
> + list_move_tail(&tfp->list, head);
> + return NULL;
> +}
> +
> +void frag_list_free(struct list_head *head)
> +{
> + struct frag_packet_list_entry *pf, *tmp_pf;
> +
> + if (!list_empty(head)) {
> +
> + list_for_each_entry_safe(pf, tmp_pf, head, list) {
> + kfree_skb(pf->skb);
> + list_del(&pf->list);
> + kfree(pf);
> + }
> + }
> + return;
> +}
> +
> +static int unicast_send_frag_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
> + struct batman_if *batman_if, uint8_t dstaddr[],
> + struct orig_node *orig_node)
> +{
> + struct unicast_frag_packet *ucast_frag1, *ucast_frag2;
> + int hdr_len = sizeof(struct unicast_frag_packet);
> + struct sk_buff *frag_skb;
> + int data_len = skb->len;
> +
> + if (!bat_priv->primary_if)
> + goto dropped;
> +
> + frag_skb = dev_alloc_skb(data_len - (data_len / 2) + hdr_len);
> + skb_split(skb, frag_skb, data_len / 2);
> +
> + if (my_skb_head_push(frag_skb, hdr_len) < 0 ||
> + my_skb_head_push(skb, hdr_len) < 0)
> + goto drop_frag;
> +
> + ucast_frag1 = (struct unicast_frag_packet *)skb->data;
> + ucast_frag2 = (struct unicast_frag_packet *)frag_skb->data;
> +
> + ucast_frag1->version = COMPAT_VERSION;
> + ucast_frag1->packet_type = BAT_UNICAST_FRAG;
> + ucast_frag1->ttl = TTL;
> + memcpy(ucast_frag1->orig,
> + bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
> + memcpy(ucast_frag1->dest, orig_node->orig, ETH_ALEN);
> +
> + memcpy(ucast_frag2, ucast_frag1, sizeof(struct unicast_frag_packet));
> +
> + ucast_frag1->flags |= UNI_FRAG_HEAD;
> + ucast_frag2->flags &= ~UNI_FRAG_HEAD;
> +
> + ucast_frag1->seqno = htons((uint16_t)atomic_inc_return(
> + &batman_if->frag_seqno));
> +
> + ucast_frag2->seqno = htons((uint16_t)atomic_inc_return(
> + &batman_if->frag_seqno));
> +
> + send_skb_packet(skb, batman_if, dstaddr);
> + send_skb_packet(frag_skb, batman_if, dstaddr);
> + return 0;
> +
> +drop_frag:
> + kfree_skb(frag_skb);
> +dropped:
> + kfree_skb(skb);
> + return 1;
> +}
> +
> +int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv)
> +{
> + struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
> + struct unicast_packet *unicast_packet;
> + struct orig_node *orig_node;
> + struct batman_if *batman_if;
> + struct neigh_node *router;
> + int data_len = skb->len;
> + uint8_t dstaddr[6];
> + unsigned long flags;
> +
> + spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
> +
> + /* get routing information */
> + orig_node = ((struct orig_node *)hash_find(bat_priv->orig_hash,
> + ethhdr->h_dest));
> +
> + /* check for hna host */
> + if (!orig_node)
> + orig_node = transtable_search(bat_priv, ethhdr->h_dest);
> +
> + router = find_router(orig_node, NULL);
> +
> + if (!router)
> + goto unlock;
> +
> + /* don't lock while sending the packets ... we therefore
> + * copy the required data before sending */
> +
> + batman_if = router->if_incoming;
> + memcpy(dstaddr, router->addr, ETH_ALEN);
> +
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> +
> + if (batman_if->if_status != IF_ACTIVE)
> + goto dropped;
> +
> + if (atomic_read(&bat_priv->frag_enabled) &&
> + data_len + sizeof(struct unicast_packet) > batman_if->net_dev->mtu)
> + return unicast_send_frag_skb(skb, bat_priv, batman_if,
> + dstaddr, orig_node);
> +
> + if (my_skb_head_push(skb, sizeof(struct unicast_packet)) < 0)
> + goto dropped;
> +
> + unicast_packet = (struct unicast_packet *)skb->data;
> +
> + unicast_packet->version = COMPAT_VERSION;
> + /* batman packet type: unicast */
> + unicast_packet->packet_type = BAT_UNICAST;
> + /* set unicast ttl */
> + unicast_packet->ttl = TTL;
> + /* copy the destination for faster routing */
> + memcpy(unicast_packet->dest, orig_node->orig, ETH_ALEN);
> +
> + send_skb_packet(skb, batman_if, dstaddr);
> + return 0;
> +
> +unlock:
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> +dropped:
> + kfree_skb(skb);
> + return 1;
> +}
> diff --git a/net/batman-adv/unicast.h b/net/batman-adv/unicast.h
> new file mode 100644
> index 0000000..1d5cbeb
> --- /dev/null
> +++ b/net/batman-adv/unicast.h
> @@ -0,0 +1,39 @@
> +/*
> + * Copyright (C) 2010 B.A.T.M.A.N. contributors:
> + *
> + * Andreas Langer
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#ifndef _NET_BATMAN_ADV_UNICAST_H_
> +#define _NET_BATMAN_ADV_UNICAST_H_
> +
> +#define FRAG_TIMEOUT 10000 /* purge frag list entrys after time in ms */
> +#define FRAG_BUFFER_SIZE 6 /* number of list elements in buffer */
> +
> +struct sk_buff *merge_frag_packet(struct list_head *head,
> + struct frag_packet_list_entry *tfp,
> + struct sk_buff *skb);
> +
> +void create_frag_entry(struct list_head *head, struct sk_buff *skb);
> +void create_frag_buffer(struct list_head *head);
> +struct frag_packet_list_entry *search_frag_packet(struct list_head *head,
> + struct unicast_frag_packet *up);
> +void frag_list_free(struct list_head *head);
> +int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv);
> +
> +#endif /* _NET_BATMAN_ADV_UNICAST_H_ */
> diff --git a/net/batman-adv/vis.c b/net/batman-adv/vis.c
> new file mode 100644
> index 0000000..b2cec8e
> --- /dev/null
> +++ b/net/batman-adv/vis.c
> @@ -0,0 +1,901 @@
> +/*
> + * Copyright (C) 2008-2010 B.A.T.M.A.N. contributors:
> + *
> + * Simon Wunderlich
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#include "main.h"
> +#include "send.h"
> +#include "translation-table.h"
> +#include "vis.h"
> +#include "soft-interface.h"
> +#include "hard-interface.h"
> +#include "hash.h"
> +
> +#define MAX_VIS_PACKET_SIZE 1000
> +
> +/* Returns the smallest signed integer in two's complement with the sizeof x */
> +#define smallest_signed_int(x) (1u << (7u + 8u * (sizeof(x) - 1u)))
> +
> +/* Checks if a sequence number x is a predecessor/successor of y.
> + they handle overflows/underflows and can correctly check for a
> + predecessor/successor unless the variable sequence number has grown by
> + more then 2**(bitwidth(x)-1)-1.
> + This means that for a uint8_t with the maximum value 255, it would think:
> + * when adding nothing - it is neither a predecessor nor a successor
> + * before adding more than 127 to the starting value - it is a predecessor,
> + * when adding 128 - it is neither a predecessor nor a successor,
> + * after adding more than 127 to the starting value - it is a successor */
> +#define seq_before(x, y) ({typeof(x) _dummy = (x - y); \
> + _dummy > smallest_signed_int(_dummy); })
> +#define seq_after(x, y) seq_before(y, x)
> +
> +static void start_vis_timer(struct bat_priv *bat_priv);
> +
> +/* free the info */
> +static void free_info(struct kref *ref)
> +{
> + struct vis_info *info = container_of(ref, struct vis_info, refcount);
> + struct bat_priv *bat_priv = info->bat_priv;
> + struct recvlist_node *entry, *tmp;
> + unsigned long flags;
> +
> + list_del_init(&info->send_list);
> + spin_lock_irqsave(&bat_priv->vis_list_lock, flags);
> + list_for_each_entry_safe(entry, tmp, &info->recv_list, list) {
> + list_del(&entry->list);
> + kfree(entry);
> + }
> +
> + spin_unlock_irqrestore(&bat_priv->vis_list_lock, flags);
> + kfree_skb(info->skb_packet);
> +}
> +
> +/* Compare two vis packets, used by the hashing algorithm */
> +static int vis_info_cmp(void *data1, void *data2)
> +{
> + struct vis_info *d1, *d2;
> + struct vis_packet *p1, *p2;
> + d1 = data1;
> + d2 = data2;
> + p1 = (struct vis_packet *)d1->skb_packet->data;
> + p2 = (struct vis_packet *)d2->skb_packet->data;
> + return compare_orig(p1->vis_orig, p2->vis_orig);
> +}
> +
> +/* hash function to choose an entry in a hash table of given size */
> +/* hash algorithm from http://en.wikipedia.org/wiki/Hash_table */
> +static int vis_info_choose(void *data, int size)
> +{
> + struct vis_info *vis_info = data;
> + struct vis_packet *packet;
> + unsigned char *key;
> + uint32_t hash = 0;
> + size_t i;
> +
> + packet = (struct vis_packet *)vis_info->skb_packet->data;
> + key = packet->vis_orig;
> + for (i = 0; i < ETH_ALEN; i++) {
> + hash += key[i];
> + hash += (hash << 10);
> + hash ^= (hash >> 6);
> + }
> +
> + hash += (hash << 3);
> + hash ^= (hash >> 11);
> + hash += (hash << 15);
> +
> + return hash % size;
> +}
> +
> +/* insert interface to the list of interfaces of one originator, if it
> + * does not already exist in the list */
> +static void vis_data_insert_interface(const uint8_t *interface,
> + struct hlist_head *if_list,
> + bool primary)
> +{
> + struct if_list_entry *entry;
> + struct hlist_node *pos;
> +
> + hlist_for_each_entry(entry, pos, if_list, list) {
> + if (compare_orig(entry->addr, (void *)interface))
> + return;
> + }
> +
> + /* its a new address, add it to the list */
> + entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
> + if (!entry)
> + return;
> + memcpy(entry->addr, interface, ETH_ALEN);
> + entry->primary = primary;
> + hlist_add_head(&entry->list, if_list);
> +}
> +
> +static ssize_t vis_data_read_prim_sec(char *buff, struct hlist_head *if_list)
> +{
> + struct if_list_entry *entry;
> + struct hlist_node *pos;
> + char tmp_addr_str[ETH_STR_LEN];
> + size_t len = 0;
> +
> + hlist_for_each_entry(entry, pos, if_list, list) {
> + if (entry->primary)
> + len += sprintf(buff + len, "PRIMARY, ");
> + else {
> + addr_to_string(tmp_addr_str, entry->addr);
> + len += sprintf(buff + len, "SEC %s, ", tmp_addr_str);
> + }
> + }
> +
> + return len;
> +}
> +
> +static size_t vis_data_count_prim_sec(struct hlist_head *if_list)
> +{
> + struct if_list_entry *entry;
> + struct hlist_node *pos;
> + size_t count = 0;
> +
> + hlist_for_each_entry(entry, pos, if_list, list) {
> + if (entry->primary)
> + count += 9;
> + else
> + count += 23;
> + }
> +
> + return count;
> +}
> +
> +/* read an entry */
> +static ssize_t vis_data_read_entry(char *buff, struct vis_info_entry *entry,
> + uint8_t *src, bool primary)
> +{
> + char to[18];
> +
> + /* maximal length: max(4+17+2, 3+17+1+3+2) == 26 */
> + addr_to_string(to, entry->dest);
> + if (primary && entry->quality == 0)
> + return sprintf(buff, "HNA %s, ", to);
> + else if (compare_orig(entry->src, src))
> + return sprintf(buff, "TQ %s %d, ", to, entry->quality);
> +
> + return 0;
> +}
> +
> +int vis_seq_print_text(struct seq_file *seq, void *offset)
> +{
> + HASHIT(hashit);
> + HASHIT(hashit_count);
> + struct vis_info *info;
> + struct vis_packet *packet;
> + struct vis_info_entry *entries;
> + struct net_device *net_dev = (struct net_device *)seq->private;
> + struct bat_priv *bat_priv = netdev_priv(net_dev);
> + HLIST_HEAD(vis_if_list);
> + struct if_list_entry *entry;
> + struct hlist_node *pos, *n;
> + int i;
> + char tmp_addr_str[ETH_STR_LEN];
> + unsigned long flags;
> + int vis_server = atomic_read(&bat_priv->vis_mode);
> + size_t buff_pos, buf_size;
> + char *buff;
> +
> + if ((!bat_priv->primary_if) ||
> + (vis_server == VIS_TYPE_CLIENT_UPDATE))
> + return 0;
> +
> + buf_size = 1;
> + /* Estimate length */
> + spin_lock_irqsave(&bat_priv->vis_hash_lock, flags);
> + while (hash_iterate(bat_priv->vis_hash, &hashit_count)) {
> + info = hashit_count.bucket->data;
> + packet = (struct vis_packet *)info->skb_packet->data;
> + entries = (struct vis_info_entry *)
> + ((char *)packet + sizeof(struct vis_packet));
> +
> + for (i = 0; i < packet->entries; i++) {
> + if (entries[i].quality == 0)
> + continue;
> + vis_data_insert_interface(entries[i].src, &vis_if_list,
> + compare_orig(entries[i].src, packet->vis_orig));
> + }
> +
> + hlist_for_each_entry(entry, pos, &vis_if_list, list) {
> + buf_size += 18 + 26 * packet->entries;
> +
> + /* add primary/secondary records */
> + if (compare_orig(entry->addr, packet->vis_orig))
> + buf_size +=
> + vis_data_count_prim_sec(&vis_if_list);
> +
> + buf_size += 1;
> + }
> +
> + hlist_for_each_entry_safe(entry, pos, n, &vis_if_list, list) {
> + hlist_del(&entry->list);
> + kfree(entry);
> + }
> + }
> +
> + buff = kmalloc(buf_size, GFP_ATOMIC);
> + if (!buff) {
> + spin_unlock_irqrestore(&bat_priv->vis_hash_lock, flags);
> + return -ENOMEM;
> + }
> + buff[0] = '\0';
> + buff_pos = 0;
> +
> + while (hash_iterate(bat_priv->vis_hash, &hashit)) {
> + info = hashit.bucket->data;
> + packet = (struct vis_packet *)info->skb_packet->data;
> + entries = (struct vis_info_entry *)
> + ((char *)packet + sizeof(struct vis_packet));
> +
> + for (i = 0; i < packet->entries; i++) {
> + if (entries[i].quality == 0)
> + continue;
> + vis_data_insert_interface(entries[i].src, &vis_if_list,
> + compare_orig(entries[i].src, packet->vis_orig));
> + }
> +
> + hlist_for_each_entry(entry, pos, &vis_if_list, list) {
> + addr_to_string(tmp_addr_str, entry->addr);
> + buff_pos += sprintf(buff + buff_pos, "%s,",
> + tmp_addr_str);
> +
> + for (i = 0; i < packet->entries; i++)
> + buff_pos += vis_data_read_entry(buff + buff_pos,
> + &entries[i],
> + entry->addr,
> + entry->primary);
> +
> + /* add primary/secondary records */
> + if (compare_orig(entry->addr, packet->vis_orig))
> + buff_pos +=
> + vis_data_read_prim_sec(buff + buff_pos,
> + &vis_if_list);
> +
> + buff_pos += sprintf(buff + buff_pos, "\n");
> + }
> +
> + hlist_for_each_entry_safe(entry, pos, n, &vis_if_list, list) {
> + hlist_del(&entry->list);
> + kfree(entry);
> + }
> + }
> +
> + spin_unlock_irqrestore(&bat_priv->vis_hash_lock, flags);
> +
> + seq_printf(seq, "%s", buff);
> + kfree(buff);
> +
> + return 0;
> +}
> +
> +/* add the info packet to the send list, if it was not
> + * already linked in. */
> +static void send_list_add(struct bat_priv *bat_priv, struct vis_info *info)
> +{
> + if (list_empty(&info->send_list)) {
> + kref_get(&info->refcount);
> + list_add_tail(&info->send_list, &bat_priv->vis_send_list);
> + }
> +}
> +
> +/* delete the info packet from the send list, if it was
> + * linked in. */
> +static void send_list_del(struct vis_info *info)
> +{
> + if (!list_empty(&info->send_list)) {
> + list_del_init(&info->send_list);
> + kref_put(&info->refcount, free_info);
> + }
> +}
> +
> +/* tries to add one entry to the receive list. */
> +static void recv_list_add(struct bat_priv *bat_priv,
> + struct list_head *recv_list, char *mac)
> +{
> + struct recvlist_node *entry;
> + unsigned long flags;
> +
> + entry = kmalloc(sizeof(struct recvlist_node), GFP_ATOMIC);
> + if (!entry)
> + return;
> +
> + memcpy(entry->mac, mac, ETH_ALEN);
> + spin_lock_irqsave(&bat_priv->vis_list_lock, flags);
> + list_add_tail(&entry->list, recv_list);
> + spin_unlock_irqrestore(&bat_priv->vis_list_lock, flags);
> +}
> +
> +/* returns 1 if this mac is in the recv_list */
> +static int recv_list_is_in(struct bat_priv *bat_priv,
> + struct list_head *recv_list, char *mac)
> +{
> + struct recvlist_node *entry;
> + unsigned long flags;
> +
> + spin_lock_irqsave(&bat_priv->vis_list_lock, flags);
> + list_for_each_entry(entry, recv_list, list) {
> + if (memcmp(entry->mac, mac, ETH_ALEN) == 0) {
> + spin_unlock_irqrestore(&bat_priv->vis_list_lock,
> + flags);
> + return 1;
> + }
> + }
> + spin_unlock_irqrestore(&bat_priv->vis_list_lock, flags);
> + return 0;
> +}
> +
> +/* try to add the packet to the vis_hash. return NULL if invalid (e.g. too old,
> + * broken.. ). vis hash must be locked outside. is_new is set when the packet
> + * is newer than old entries in the hash. */
> +static struct vis_info *add_packet(struct bat_priv *bat_priv,
> + struct vis_packet *vis_packet,
> + int vis_info_len, int *is_new,
> + int make_broadcast)
> +{
> + struct vis_info *info, *old_info;
> + struct vis_packet *search_packet, *old_packet;
> + struct vis_info search_elem;
> + struct vis_packet *packet;
> +
> + *is_new = 0;
> + /* sanity check */
> + if (!bat_priv->vis_hash)
> + return NULL;
> +
> + /* see if the packet is already in vis_hash */
> + search_elem.skb_packet = dev_alloc_skb(sizeof(struct vis_packet));
> + if (!search_elem.skb_packet)
> + return NULL;
> + search_packet = (struct vis_packet *)skb_put(search_elem.skb_packet,
> + sizeof(struct vis_packet));
> +
> + memcpy(search_packet->vis_orig, vis_packet->vis_orig, ETH_ALEN);
> + old_info = hash_find(bat_priv->vis_hash, &search_elem);
> + kfree_skb(search_elem.skb_packet);
> +
> + if (old_info != NULL) {
> + old_packet = (struct vis_packet *)old_info->skb_packet->data;
> + if (!seq_after(ntohl(vis_packet->seqno),
> + ntohl(old_packet->seqno))) {
> + if (old_packet->seqno == vis_packet->seqno) {
> + recv_list_add(bat_priv, &old_info->recv_list,
> + vis_packet->sender_orig);
> + return old_info;
> + } else {
> + /* newer packet is already in hash. */
> + return NULL;
> + }
> + }
> + /* remove old entry */
> + hash_remove(bat_priv->vis_hash, old_info);
> + send_list_del(old_info);
> + kref_put(&old_info->refcount, free_info);
> + }
> +
> + info = kmalloc(sizeof(struct vis_info), GFP_ATOMIC);
> + if (!info)
> + return NULL;
> +
> + info->skb_packet = dev_alloc_skb(sizeof(struct vis_packet) +
> + vis_info_len + sizeof(struct ethhdr));
> + if (!info->skb_packet) {
> + kfree(info);
> + return NULL;
> + }
> + skb_reserve(info->skb_packet, sizeof(struct ethhdr));
> + packet = (struct vis_packet *)skb_put(info->skb_packet,
> + sizeof(struct vis_packet) +
> + vis_info_len);
> +
> + kref_init(&info->refcount);
> + INIT_LIST_HEAD(&info->send_list);
> + INIT_LIST_HEAD(&info->recv_list);
> + info->first_seen = jiffies;
> + info->bat_priv = bat_priv;
> + memcpy(packet, vis_packet, sizeof(struct vis_packet) + vis_info_len);
> +
> + /* initialize and add new packet. */
> + *is_new = 1;
> +
> + /* Make it a broadcast packet, if required */
> + if (make_broadcast)
> + memcpy(packet->target_orig, broadcast_addr, ETH_ALEN);
> +
> + /* repair if entries is longer than packet. */
> + if (packet->entries * sizeof(struct vis_info_entry) > vis_info_len)
> + packet->entries = vis_info_len / sizeof(struct vis_info_entry);
> +
> + recv_list_add(bat_priv, &info->recv_list, packet->sender_orig);
> +
> + /* try to add it */
> + if (hash_add(bat_priv->vis_hash, info) < 0) {
> + /* did not work (for some reason) */
> + kref_put(&old_info->refcount, free_info);
> + info = NULL;
> + }
> +
> + return info;
> +}
> +
> +/* handle the server sync packet, forward if needed. */
> +void receive_server_sync_packet(struct bat_priv *bat_priv,
> + struct vis_packet *vis_packet,
> + int vis_info_len)
> +{
> + struct vis_info *info;
> + int is_new, make_broadcast;
> + unsigned long flags;
> + int vis_server = atomic_read(&bat_priv->vis_mode);
> +
> + make_broadcast = (vis_server == VIS_TYPE_SERVER_SYNC);
> +
> + spin_lock_irqsave(&bat_priv->vis_hash_lock, flags);
> + info = add_packet(bat_priv, vis_packet, vis_info_len,
> + &is_new, make_broadcast);
> + if (!info)
> + goto end;
> +
> + /* only if we are server ourselves and packet is newer than the one in
> + * hash.*/
> + if (vis_server == VIS_TYPE_SERVER_SYNC && is_new)
> + send_list_add(bat_priv, info);
> +end:
> + spin_unlock_irqrestore(&bat_priv->vis_hash_lock, flags);
> +}
> +
> +/* handle an incoming client update packet and schedule forward if needed. */
> +void receive_client_update_packet(struct bat_priv *bat_priv,
> + struct vis_packet *vis_packet,
> + int vis_info_len)
> +{
> + struct vis_info *info;
> + struct vis_packet *packet;
> + int is_new;
> + unsigned long flags;
> + int vis_server = atomic_read(&bat_priv->vis_mode);
> + int are_target = 0;
> +
> + /* clients shall not broadcast. */
> + if (is_bcast(vis_packet->target_orig))
> + return;
> +
> + /* Are we the target for this VIS packet? */
> + if (vis_server == VIS_TYPE_SERVER_SYNC &&
> + is_my_mac(vis_packet->target_orig))
> + are_target = 1;
> +
> + spin_lock_irqsave(&bat_priv->vis_hash_lock, flags);
> + info = add_packet(bat_priv, vis_packet, vis_info_len,
> + &is_new, are_target);
> +
> + if (!info)
> + goto end;
> + /* note that outdated packets will be dropped at this point. */
> +
> + packet = (struct vis_packet *)info->skb_packet->data;
> +
> + /* send only if we're the target server or ... */
> + if (are_target && is_new) {
> + packet->vis_type = VIS_TYPE_SERVER_SYNC; /* upgrade! */
> + send_list_add(bat_priv, info);
> +
> + /* ... we're not the recipient (and thus need to forward). */
> + } else if (!is_my_mac(packet->target_orig)) {
> + send_list_add(bat_priv, info);
> + }
> +
> +end:
> + spin_unlock_irqrestore(&bat_priv->vis_hash_lock, flags);
> +}
> +
> +/* Walk the originators and find the VIS server with the best tq. Set the packet
> + * address to its address and return the best_tq.
> + *
> + * Must be called with the originator hash locked */
> +static int find_best_vis_server(struct bat_priv *bat_priv,
> + struct vis_info *info)
> +{
> + HASHIT(hashit);
> + struct orig_node *orig_node;
> + struct vis_packet *packet;
> + int best_tq = -1;
> +
> + packet = (struct vis_packet *)info->skb_packet->data;
> +
> + while (hash_iterate(bat_priv->orig_hash, &hashit)) {
> + orig_node = hashit.bucket->data;
> + if ((orig_node) && (orig_node->router) &&
> + (orig_node->flags & VIS_SERVER) &&
> + (orig_node->router->tq_avg > best_tq)) {
> + best_tq = orig_node->router->tq_avg;
> + memcpy(packet->target_orig, orig_node->orig, ETH_ALEN);
> + }
> + }
> + return best_tq;
> +}
> +
> +/* Return true if the vis packet is full. */
> +static bool vis_packet_full(struct vis_info *info)
> +{
> + struct vis_packet *packet;
> + packet = (struct vis_packet *)info->skb_packet->data;
> +
> + if (MAX_VIS_PACKET_SIZE / sizeof(struct vis_info_entry)
> + < packet->entries + 1)
> + return true;
> + return false;
> +}
> +
> +/* generates a packet of own vis data,
> + * returns 0 on success, -1 if no packet could be generated */
> +static int generate_vis_packet(struct bat_priv *bat_priv)
> +{
> + HASHIT(hashit_local);
> + HASHIT(hashit_global);
> + struct orig_node *orig_node;
> + struct vis_info *info = (struct vis_info *)bat_priv->my_vis_info;
> + struct vis_packet *packet = (struct vis_packet *)info->skb_packet->data;
> + struct vis_info_entry *entry;
> + struct hna_local_entry *hna_local_entry;
> + int best_tq = -1;
> + unsigned long flags;
> +
> + info->first_seen = jiffies;
> + packet->vis_type = atomic_read(&bat_priv->vis_mode);
> +
> + spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
> + memcpy(packet->target_orig, broadcast_addr, ETH_ALEN);
> + packet->ttl = TTL;
> + packet->seqno = htonl(ntohl(packet->seqno) + 1);
> + packet->entries = 0;
> + skb_trim(info->skb_packet, sizeof(struct vis_packet));
> +
> + if (packet->vis_type == VIS_TYPE_CLIENT_UPDATE) {
> + best_tq = find_best_vis_server(bat_priv, info);
> +
> + if (best_tq < 0) {
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock,
> + flags);
> + return -1;
> + }
> + }
> +
> + while (hash_iterate(bat_priv->orig_hash, &hashit_global)) {
> + orig_node = hashit_global.bucket->data;
> +
> + if (!orig_node->router)
> + continue;
> +
> + if (!compare_orig(orig_node->router->addr, orig_node->orig))
> + continue;
> +
> + if (orig_node->router->if_incoming->if_status != IF_ACTIVE)
> + continue;
> +
> + if (orig_node->router->tq_avg < 1)
> + continue;
> +
> + /* fill one entry into buffer. */
> + entry = (struct vis_info_entry *)
> + skb_put(info->skb_packet, sizeof(*entry));
> + memcpy(entry->src,
> + orig_node->router->if_incoming->net_dev->dev_addr,
> + ETH_ALEN);
> + memcpy(entry->dest, orig_node->orig, ETH_ALEN);
> + entry->quality = orig_node->router->tq_avg;
> + packet->entries++;
> +
> + if (vis_packet_full(info)) {
> + spin_unlock_irqrestore(
> + &bat_priv->orig_hash_lock, flags);
> + return 0;
> + }
> + }
> +
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> +
> + spin_lock_irqsave(&bat_priv->hna_lhash_lock, flags);
> + while (hash_iterate(bat_priv->hna_local_hash, &hashit_local)) {
> + hna_local_entry = hashit_local.bucket->data;
> + entry = (struct vis_info_entry *)skb_put(info->skb_packet,
> + sizeof(*entry));
> + memset(entry->src, 0, ETH_ALEN);
> + memcpy(entry->dest, hna_local_entry->addr, ETH_ALEN);
> + entry->quality = 0; /* 0 means HNA */
> + packet->entries++;
> +
> + if (vis_packet_full(info)) {
> + spin_unlock_irqrestore(&bat_priv->hna_lhash_lock,
> + flags);
> + return 0;
> + }
> + }
> +
> + spin_unlock_irqrestore(&bat_priv->hna_lhash_lock, flags);
> + return 0;
> +}
> +
> +/* free old vis packets. Must be called with this vis_hash_lock
> + * held */
> +static void purge_vis_packets(struct bat_priv *bat_priv)
> +{
> + HASHIT(hashit);
> + struct vis_info *info;
> +
> + while (hash_iterate(bat_priv->vis_hash, &hashit)) {
> + info = hashit.bucket->data;
> +
> + /* never purge own data. */
> + if (info == bat_priv->my_vis_info)
> + continue;
> +
> + if (time_after(jiffies,
> + info->first_seen + VIS_TIMEOUT * HZ)) {
> + hash_remove_bucket(bat_priv->vis_hash, &hashit);
> + send_list_del(info);
> + kref_put(&info->refcount, free_info);
> + }
> + }
> +}
> +
> +static void broadcast_vis_packet(struct bat_priv *bat_priv,
> + struct vis_info *info)
> +{
> + HASHIT(hashit);
> + struct orig_node *orig_node;
> + struct vis_packet *packet;
> + struct sk_buff *skb;
> + unsigned long flags;
> + struct batman_if *batman_if;
> + uint8_t dstaddr[ETH_ALEN];
> +
> +
> + spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
> + packet = (struct vis_packet *)info->skb_packet->data;
> +
> + /* send to all routers in range. */
> + while (hash_iterate(bat_priv->orig_hash, &hashit)) {
> + orig_node = hashit.bucket->data;
> +
> + /* if it's a vis server and reachable, send it. */
> + if ((!orig_node) || (!orig_node->router))
> + continue;
> + if (!(orig_node->flags & VIS_SERVER))
> + continue;
> + /* don't send it if we already received the packet from
> + * this node. */
> + if (recv_list_is_in(bat_priv, &info->recv_list,
> + orig_node->orig))
> + continue;
> +
> + memcpy(packet->target_orig, orig_node->orig, ETH_ALEN);
> + batman_if = orig_node->router->if_incoming;
> + memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> +
> + skb = skb_clone(info->skb_packet, GFP_ATOMIC);
> + if (skb)
> + send_skb_packet(skb, batman_if, dstaddr);
> +
> + spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
> +
> + }
> +
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> +}
> +
> +static void unicast_vis_packet(struct bat_priv *bat_priv,
> + struct vis_info *info)
> +{
> + struct orig_node *orig_node;
> + struct sk_buff *skb;
> + struct vis_packet *packet;
> + unsigned long flags;
> + struct batman_if *batman_if;
> + uint8_t dstaddr[ETH_ALEN];
> +
> + spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);
> + packet = (struct vis_packet *)info->skb_packet->data;
> + orig_node = ((struct orig_node *)hash_find(bat_priv->orig_hash,
> + packet->target_orig));
> +
> + if ((!orig_node) || (!orig_node->router))
> + goto out;
> +
> + /* don't lock while sending the packets ... we therefore
> + * copy the required data before sending */
> + batman_if = orig_node->router->if_incoming;
> + memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> +
> + skb = skb_clone(info->skb_packet, GFP_ATOMIC);
> + if (skb)
> + send_skb_packet(skb, batman_if, dstaddr);
> +
> + return;
> +
> +out:
> + spin_unlock_irqrestore(&bat_priv->orig_hash_lock, flags);
> +}
> +
> +/* only send one vis packet. called from send_vis_packets() */
> +static void send_vis_packet(struct bat_priv *bat_priv, struct vis_info *info)
> +{
> + struct vis_packet *packet;
> +
> + packet = (struct vis_packet *)info->skb_packet->data;
> + if (packet->ttl < 2) {
> + pr_debug("Error - can't send vis packet: ttl exceeded\n");
> + return;
> + }
> +
> + memcpy(packet->sender_orig, bat_priv->primary_if->net_dev->dev_addr,
> + ETH_ALEN);
> + packet->ttl--;
> +
> + if (is_bcast(packet->target_orig))
> + broadcast_vis_packet(bat_priv, info);
> + else
> + unicast_vis_packet(bat_priv, info);
> + packet->ttl++; /* restore TTL */
> +}
> +
> +/* called from timer; send (and maybe generate) vis packet. */
> +static void send_vis_packets(struct work_struct *work)
> +{
> + struct delayed_work *delayed_work =
> + container_of(work, struct delayed_work, work);
> + struct bat_priv *bat_priv =
> + container_of(delayed_work, struct bat_priv, vis_work);
> + struct vis_info *info, *temp;
> + unsigned long flags;
> +
> + spin_lock_irqsave(&bat_priv->vis_hash_lock, flags);
> + purge_vis_packets(bat_priv);
> +
> + if (generate_vis_packet(bat_priv) == 0) {
> + /* schedule if generation was successful */
> + send_list_add(bat_priv, bat_priv->my_vis_info);
> + }
> +
> + list_for_each_entry_safe(info, temp, &bat_priv->vis_send_list,
> + send_list) {
> +
> + kref_get(&info->refcount);
> + spin_unlock_irqrestore(&bat_priv->vis_hash_lock, flags);
> +
> + if (bat_priv->primary_if)
> + send_vis_packet(bat_priv, info);
> +
> + spin_lock_irqsave(&bat_priv->vis_hash_lock, flags);
> + send_list_del(info);
> + kref_put(&info->refcount, free_info);
> + }
> + spin_unlock_irqrestore(&bat_priv->vis_hash_lock, flags);
> + start_vis_timer(bat_priv);
> +}
> +
> +/* init the vis server. this may only be called when if_list is already
> + * initialized (e.g. bat0 is initialized, interfaces have been added) */
> +int vis_init(struct bat_priv *bat_priv)
> +{
> + struct vis_packet *packet;
> + unsigned long flags;
> +
> + if (bat_priv->vis_hash)
> + return 1;
> +
> + spin_lock_irqsave(&bat_priv->vis_hash_lock, flags);
> +
> + bat_priv->vis_hash = hash_new(256, vis_info_cmp, vis_info_choose);
> + if (!bat_priv->vis_hash) {
> + pr_err("Can't initialize vis_hash\n");
> + goto err;
> + }
> +
> + bat_priv->my_vis_info = kmalloc(MAX_VIS_PACKET_SIZE, GFP_ATOMIC);
> + if (!bat_priv->my_vis_info) {
> + pr_err("Can't initialize vis packet\n");
> + goto err;
> + }
> +
> + bat_priv->my_vis_info->skb_packet = dev_alloc_skb(
> + sizeof(struct vis_packet) +
> + MAX_VIS_PACKET_SIZE +
> + sizeof(struct ethhdr));
> + if (!bat_priv->my_vis_info->skb_packet)
> + goto free_info;
> +
> + skb_reserve(bat_priv->my_vis_info->skb_packet, sizeof(struct ethhdr));
> + packet = (struct vis_packet *)skb_put(
> + bat_priv->my_vis_info->skb_packet,
> + sizeof(struct vis_packet));
> +
> + /* prefill the vis info */
> + bat_priv->my_vis_info->first_seen = jiffies -
> + msecs_to_jiffies(VIS_INTERVAL);
> + INIT_LIST_HEAD(&bat_priv->my_vis_info->recv_list);
> + INIT_LIST_HEAD(&bat_priv->my_vis_info->send_list);
> + kref_init(&bat_priv->my_vis_info->refcount);
> + bat_priv->my_vis_info->bat_priv = bat_priv;
> + packet->version = COMPAT_VERSION;
> + packet->packet_type = BAT_VIS;
> + packet->ttl = TTL;
> + packet->seqno = 0;
> + packet->entries = 0;
> +
> + INIT_LIST_HEAD(&bat_priv->vis_send_list);
> +
> + if (hash_add(bat_priv->vis_hash, bat_priv->my_vis_info) < 0) {
> + pr_err("Can't add own vis packet into hash\n");
> + /* not in hash, need to remove it manually. */
> + kref_put(&bat_priv->my_vis_info->refcount, free_info);
> + goto err;
> + }
> +
> + spin_unlock_irqrestore(&bat_priv->vis_hash_lock, flags);
> + start_vis_timer(bat_priv);
> + return 1;
> +
> +free_info:
> + kfree(bat_priv->my_vis_info);
> + bat_priv->my_vis_info = NULL;
> +err:
> + spin_unlock_irqrestore(&bat_priv->vis_hash_lock, flags);
> + vis_quit(bat_priv);
> + return 0;
> +}
> +
> +/* Decrease the reference count on a hash item info */
> +static void free_info_ref(void *data, void *arg)
> +{
> + struct vis_info *info = data;
> +
> + send_list_del(info);
> + kref_put(&info->refcount, free_info);
> +}
> +
> +/* shutdown vis-server */
> +void vis_quit(struct bat_priv *bat_priv)
> +{
> + unsigned long flags;
> + if (!bat_priv->vis_hash)
> + return;
> +
> + cancel_delayed_work_sync(&bat_priv->vis_work);
> +
> + spin_lock_irqsave(&bat_priv->vis_hash_lock, flags);
> + /* properly remove, kill timers ... */
> + hash_delete(bat_priv->vis_hash, free_info_ref, NULL);
> + bat_priv->vis_hash = NULL;
> + bat_priv->my_vis_info = NULL;
> + spin_unlock_irqrestore(&bat_priv->vis_hash_lock, flags);
> +}
> +
> +/* schedule packets for (re)transmission */
> +static void start_vis_timer(struct bat_priv *bat_priv)
> +{
> + INIT_DELAYED_WORK(&bat_priv->vis_work, send_vis_packets);
> + queue_delayed_work(bat_event_workqueue, &bat_priv->vis_work,
> + msecs_to_jiffies(VIS_INTERVAL));
> +}
> diff --git a/net/batman-adv/vis.h b/net/batman-adv/vis.h
> new file mode 100644
> index 0000000..2c3b330
> --- /dev/null
> +++ b/net/batman-adv/vis.h
> @@ -0,0 +1,37 @@
> +/*
> + * Copyright (C) 2008-2010 B.A.T.M.A.N. contributors:
> + *
> + * Simon Wunderlich, Marek Lindner
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA
> + *
> + */
> +
> +#ifndef _NET_BATMAN_ADV_VIS_H_
> +#define _NET_BATMAN_ADV_VIS_H_
> +
> +#define VIS_TIMEOUT 200 /* timeout of vis packets in seconds */
> +
> +int vis_seq_print_text(struct seq_file *seq, void *offset);
> +void receive_server_sync_packet(struct bat_priv *bat_priv,
> + struct vis_packet *vis_packet,
> + int vis_info_len);
> +void receive_client_update_packet(struct bat_priv *bat_priv,
> + struct vis_packet *vis_packet,
> + int vis_info_len);
> +int vis_init(struct bat_priv *bat_priv);
> +void vis_quit(struct bat_priv *bat_priv);
> +
> +#endif /* _NET_BATMAN_ADV_VIS_H_ */
> --
> 1.7.1
>
> --
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