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authorPatrick McHardy <kaber@trash.net>2006-04-04 13:42:35 -0700
committerDavid S. Miller <davem@sunset.davemloft.net>2006-04-09 22:25:23 -0700
commit2e2f7aefa8a8ba4adb6ecee8cbb43fbe9ca4cc89 (patch)
tree891921c05dbf5ac2436473d77b8dbfda91a1b9bc /net/bridge
parent550e29bc96e6f1ced2bca82dace197b009434367 (diff)
downloadlinux-2e2f7aefa8a8ba4adb6ecee8cbb43fbe9ca4cc89.tar.bz2
[NETFILTER]: Fix fragmentation issues with bridge netfilter
The conntrack code doesn't do re-fragmentation of defragmented packets anymore but relies on fragmentation in the IP layer. Purely bridged packets don't pass through the IP layer, so the bridge netfilter code needs to take care of fragmentation itself. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge')
-rw-r--r--net/bridge/br_netfilter.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/net/bridge/br_netfilter.c b/net/bridge/br_netfilter.c
index f29450b788be..3da9264449f7 100644
--- a/net/bridge/br_netfilter.c
+++ b/net/bridge/br_netfilter.c
@@ -765,6 +765,15 @@ out:
return NF_STOLEN;
}
+static int br_nf_dev_queue_xmit(struct sk_buff *skb)
+{
+ if (skb->protocol == htons(ETH_P_IP) &&
+ skb->len > skb->dev->mtu &&
+ !(skb_shinfo(skb)->ufo_size || skb_shinfo(skb)->tso_size))
+ return ip_fragment(skb, br_dev_queue_push_xmit);
+ else
+ return br_dev_queue_push_xmit(skb);
+}
/* PF_BRIDGE/POST_ROUTING ********************************************/
static unsigned int br_nf_post_routing(unsigned int hook, struct sk_buff **pskb,
@@ -824,7 +833,7 @@ static unsigned int br_nf_post_routing(unsigned int hook, struct sk_buff **pskb,
realoutdev = nf_bridge->netoutdev;
#endif
NF_HOOK(pf, NF_IP_POST_ROUTING, skb, NULL, realoutdev,
- br_dev_queue_push_xmit);
+ br_nf_dev_queue_xmit);
return NF_STOLEN;
@@ -869,7 +878,7 @@ static unsigned int ip_sabotage_out(unsigned int hook, struct sk_buff **pskb,
if ((out->hard_start_xmit == br_dev_xmit &&
okfn != br_nf_forward_finish &&
- okfn != br_nf_local_out_finish && okfn != br_dev_queue_push_xmit)
+ okfn != br_nf_local_out_finish && okfn != br_nf_dev_queue_xmit)
#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
|| ((out->priv_flags & IFF_802_1Q_VLAN) &&
VLAN_DEV_INFO(out)->real_dev->hard_start_xmit == br_dev_xmit)