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kernel patch for false igmp querier

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Sukru Senli 2015-05-08 16:56:30 +02:00 • committed by Martin Schröder
parent 72d5e655c6
commit cfa78a7cb3
1 changed files with 57 additions and 0 deletions
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57
bcmkernel/patches/001-false_igmp_querier_patch Normal file
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@ -0,0 +1,57 @@
--- a/bcm963xx/kernel/linux-3.4rt/net/ipv4/route.c
+++ b/bcm963xx/kernel/linux-3.4rt/net/ipv4/route.c
@@ -2438,6 +2438,12 @@ int ip_route_input_common(struct sk_buff *skb, __be32 daddr, __be32 saddr,
int iif = dev->ifindex;
struct net *net;
int res;
+ __be32 newsaddr = saddr;
+
+ if (ipv4_is_multicast(daddr)) {
+ if(strchr(dev->name, '.') && saddr == 0xc0a80101)
+ newsaddr = 0xc6336401;
+ }
net = dev_net(dev);
@@ -2447,12 +2453,12 @@ int ip_route_input_common(struct sk_buff *skb, __be32 daddr, __be32 saddr,
goto skip_cache;
tos &= IPTOS_RT_MASK;
- hash = rt_hash(daddr, saddr, iif, rt_genid(net));
+ hash = rt_hash(daddr, newsaddr, iif, rt_genid(net));
for (rth = rcu_dereference(rt_hash_table[hash].chain); rth;
rth = rcu_dereference(rth->dst.rt_next)) {
if ((((__force u32)rth->rt_key_dst ^ (__force u32)daddr) |
- ((__force u32)rth->rt_key_src ^ (__force u32)saddr) |
+ ((__force u32)rth->rt_key_src ^ (__force u32)newsaddr) |
(rth->rt_route_iif ^ iif) |
(rth->rt_key_tos ^ tos)) == 0 &&
rth->rt_mark == skb->mark &&
@@ -2489,7 +2495,7 @@ skip_cache:
struct in_device *in_dev = __in_dev_get_rcu(dev);
if (in_dev) {
- int our = ip_check_mc_rcu(in_dev, daddr, saddr,
+ int our = ip_check_mc_rcu(in_dev, daddr, newsaddr,
ip_hdr(skb)->protocol);
if (our
#ifdef CONFIG_IP_MROUTE
@@ -2498,7 +2504,7 @@ skip_cache:
IN_DEV_MFORWARD(in_dev))
#endif
) {
- int res = ip_route_input_mc(skb, daddr, saddr,
+ int res = ip_route_input_mc(skb, daddr, newsaddr,
tos, dev, our);
rcu_read_unlock();
return res;
@@ -2507,7 +2513,7 @@ skip_cache:
rcu_read_unlock();
return -EINVAL;
}
- res = ip_route_input_slow(skb, daddr, saddr, tos, dev);
+ res = ip_route_input_slow(skb, daddr, newsaddr, tos, dev);
rcu_read_unlock();
return res;
}