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Date: Fri, 25 Apr 2008 00:04:32 +0200
From: Bernard Pidoux <bpidoux@...e.fr>
To: "David S. Miller" <davem@...emloft.net>
Cc: Ralf Baechle DL5RB <ralf@...ux-mips.org>,
Linux Netdev List <netdev@...r.kernel.org>,
"linux-hams" <linux-hams@...r.kernel.org>
Subject: [PATCH] [ROSE] [AX25] rose_get_route() added
This patch offers a new function, named rose_get_route(), called
by rose_route_frame() in order to find a route each time a packet
must be routed toward a specific address handled by one of the adjacent
nodes in a list.
It returns the address of the adjacent node if it is connected,
otherwise it returns a NULL. In that case, the calling function
will initiate a new connection as before, when it was calling
rose_get_neigh(). However, the new thing is that if a route is
already opened via an adjacent node, the frame is routed immediately.
This function has been tested for months now and it works fine.
It adds a fast automatic frame routing mechanism from nodes to nodes,
while identifaction of packets remains all along with callsigns
of calling and destination AX25 station.
---
include/net/rose.h | 1 +
net/rose/rose_route.c | 30 +++++++++++++++++++++++++++---
2 files changed, 28 insertions(+), 3 deletions(-)
diff --git a/include/net/rose.h b/include/net/rose.h
index e5bb084..de88459 100644
--- a/include/net/rose.h
+++ b/include/net/rose.h
@@ -201,6 +201,7 @@ extern void rose_link_device_down(struct net_device *);
extern struct net_device *rose_dev_first(void);
extern struct net_device *rose_dev_get(rose_address *);
extern struct rose_route *rose_route_free_lci(unsigned int, struct rose_neigh
*);
+extern struct rose_neigh *rose_get_route(rose_address *);
extern struct rose_neigh *rose_get_neigh(rose_address *, unsigned char *,
unsigned char *);
extern int rose_rt_ioctl(unsigned int, void __user *);
extern void rose_link_failed(ax25_cb *, int);
diff --git a/net/rose/rose_route.c b/net/rose/rose_route.c
index 5053a53..ad0ebdc 100644
--- a/net/rose/rose_route.c
+++ b/net/rose/rose_route.c
@@ -662,6 +662,31 @@ struct rose_route *rose_route_free_lci(unsigned int lci,
struct rose_neigh *neig
}
/*
+ * Find an opened route given a ROSE address.
+ */
+struct rose_neigh *rose_get_route(rose_address *addr)
+{
+ struct rose_node *node;
+ struct rose_neigh *res = NULL;
+ int i;
+
+ spin_lock_bh(&rose_node_list_lock);
+ for (node = rose_node_list; node != NULL; node = node->next) {
+ if (rosecmpm(addr, &node->address, node->mask) == 0) {
+ for (i = 0; i < node->count; i++) {
+ if (node->neighbour[i]->restarted) {
+ res = node->neighbour[i];
+ goto out;
+ }
+ }
+ }
+ }
+out:
+ spin_unlock_bh(&rose_node_list_lock);
+ return res;
+}
+
+/*
* Find a neighbour given a ROSE address.
*/
struct rose_neigh *rose_get_neigh(rose_address *addr, unsigned char *cause,
@@ -842,7 +867,6 @@ int rose_route_frame(struct sk_buff *skb, ax25_cb *ax25)
struct sock *sk;
unsigned short frametype;
unsigned int lci, new_lci;
- unsigned char cause, diagnostic;
struct net_device *dev;
int len, res = 0;
char buf[11];
@@ -1018,8 +1042,8 @@ int rose_route_frame(struct sk_buff *skb, ax25_cb *ax25)
rose_route = rose_route->next;
}
- if ((new_neigh = rose_get_neigh(dest_addr, &cause, &diagnostic)) == NULL) {
- rose_transmit_clear_request(rose_neigh, lci, cause, diagnostic);
+ if ((new_neigh = rose_get_route(dest_addr)) == NULL) {
+ rose_transmit_clear_request(rose_neigh, lci, ROSE_NOT_OBTAINABLE, 0);
goto out;
}
--
1.5.5
--
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