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Message-ID: <20080108011057.GA21168@cisco.com>
Date: Mon, 7 Jan 2008 17:10:57 -0800
From: Vince Fuller <vaf@...co.com>
To: netdev@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, vaf@...co.com
Subject: [PATCH 001/001] ipv4: enable use of 240/4 address space
from Vince Fuller <vaf@....net>
This set of diffs modify the 2.6.20 kernel to enable use of the 240/4
(aka "class-E") address space as consistent with the Internet Draft
draft-fuller-240space-00.txt.
Signed-off-by: Vince Fuller <vaf@....net>
---
--- include/linux/in.h.orig 2007-04-12 10:16:20.000000000 -0700
+++ include/linux/in.h 2008-01-07 16:54:38.000000000 -0800
@@ -215,8 +215,16 @@ struct sockaddr_in {
#define IN_MULTICAST(a) IN_CLASSD(a)
#define IN_MULTICAST_NET 0xF0000000
+#define IN_CLASSE(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)
+#define IN_CLASSE_NET 0xffffff00
+#define IN_CLASSE_NSHIFT 8
+#define IN_CLASSE_HOST (0xffffffff & ~IN_CLASSE_NET)
+
+/*
+ * these are no longer used
#define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)
#define IN_BADCLASS(a) IN_EXPERIMENTAL((a))
+*/
/* Address to accept any incoming messages. */
#define INADDR_ANY ((unsigned long int) 0x00000000)
--- net/ipv4/devinet.c.orig 2007-04-12 10:16:23.000000000 -0700
+++ net/ipv4/devinet.c 2008-01-07 16:55:59.000000000 -0800
@@ -594,6 +594,8 @@ static __inline__ int inet_abc_len(__be3
rc = 16;
else if (IN_CLASSC(haddr))
rc = 24;
+ else if (IN_CLASSE(haddr))
+ rc = 24;
}
return rc;
--- net/ipv4/fib_frontend.c.orig 2007-06-07 10:47:08.000000000 -0700
+++ net/ipv4/fib_frontend.c 2008-01-07 16:55:59.000000000 -0800
@@ -152,7 +152,7 @@ unsigned inet_addr_type(__be32 addr)
struct fib_result res;
unsigned ret = RTN_BROADCAST;
- if (ZERONET(addr) || BADCLASS(addr))
+ if (ZERONET(addr) || addr == INADDR_BROADCAST)
return RTN_BROADCAST;
if (MULTICAST(addr))
return RTN_MULTICAST;
--- net/ipv4/ipconfig.c.orig 2007-04-12 10:16:23.000000000 -0700
+++ net/ipv4/ipconfig.c 2008-01-07 16:55:59.000000000 -0800
@@ -379,6 +379,8 @@ static int __init ic_defaults(void)
ic_netmask = htonl(IN_CLASSB_NET);
else if (IN_CLASSC(ntohl(ic_myaddr)))
ic_netmask = htonl(IN_CLASSC_NET);
+ else if (IN_CLASSE(ntohl(ic_myaddr)))
+ ic_netmask = htonl(IN_CLASSE_NET);
else {
printk(KERN_ERR "IP-Config: Unable to guess netmask for address %u.%u.%u.%u\n",
NIPQUAD(ic_myaddr));
--- net/ipv4/route.c.orig 2007-04-12 10:16:24.000000000 -0700
+++ net/ipv4/route.c 2008-01-07 16:55:59.000000000 -0800
@@ -1140,7 +1140,7 @@ void ip_rt_redirect(__be32 old_gw, __be3
return;
if (new_gw == old_gw || !IN_DEV_RX_REDIRECTS(in_dev)
- || MULTICAST(new_gw) || BADCLASS(new_gw) || ZERONET(new_gw))
+ || MULTICAST(new_gw) || new_gw == INADDR_BROADCAST || ZERONET(new_gw))
goto reject_redirect;
if (!IN_DEV_SHARED_MEDIA(in_dev)) {
@@ -1617,7 +1617,7 @@ static int ip_route_input_mc(struct sk_b
if (in_dev == NULL)
return -EINVAL;
- if (MULTICAST(saddr) || BADCLASS(saddr) || LOOPBACK(saddr) ||
+ if (MULTICAST(saddr) || saddr == INADDR_BROADCAST || LOOPBACK(saddr) ||
skb->protocol != htons(ETH_P_IP))
goto e_inval;
@@ -1935,7 +1935,7 @@ static int ip_route_input_slow(struct sk
by fib_lookup.
*/
- if (MULTICAST(saddr) || BADCLASS(saddr) || LOOPBACK(saddr))
+ if (MULTICAST(saddr) || saddr == INADDR_BROADCAST || LOOPBACK(saddr))
goto martian_source;
if (daddr == htonl(0xFFFFFFFF) || (saddr == 0 && daddr == 0))
@@ -1947,7 +1947,7 @@ static int ip_route_input_slow(struct sk
if (ZERONET(saddr))
goto martian_source;
- if (BADCLASS(daddr) || ZERONET(daddr) || LOOPBACK(daddr))
+ if (ZERONET(daddr) || LOOPBACK(daddr))
goto martian_destination;
/*
@@ -2171,7 +2171,7 @@ static inline int __mkroute_output(struc
res->type = RTN_BROADCAST;
else if (MULTICAST(fl->fl4_dst))
res->type = RTN_MULTICAST;
- else if (BADCLASS(fl->fl4_dst) || ZERONET(fl->fl4_dst))
+ else if (ZERONET(fl->fl4_dst))
return -EINVAL;
if (dev_out->flags & IFF_LOOPBACK)
@@ -2391,7 +2391,7 @@ static int ip_route_output_slow(struct r
if (oldflp->fl4_src) {
err = -EINVAL;
if (MULTICAST(oldflp->fl4_src) ||
- BADCLASS(oldflp->fl4_src) ||
+ oldflp->fl4_src == INADDR_BROADCAST ||
ZERONET(oldflp->fl4_src))
goto out;
--
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