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authorWei Yongjun <yjwei@cn.fujitsu.com>2008-07-31 20:46:47 -0700
committerDavid S. Miller <davem@davemloft.net>2008-07-31 20:46:47 -0700
commit77e2f14f71d68d05945f1d30ca55b5194d6ab1ce (patch)
treeedbc4034a01f2e037a1be42fc2d39f33d1b44d3d /net/ipv6/ip6_output.c
parentbc4768eb081a67642c0c44c34ea597c273bdedcb (diff)
downloadlinux-77e2f14f71d68d05945f1d30ca55b5194d6ab1ce.tar.bz2
ipv6: Fix ip6_xmit to send fragments if ipfragok is true
SCTP used ip6_xmit() to send fragments after received ICMP packet too big message. But while send packet used ip6_xmit, the skb->local_df is not initialized. So when skb if enter ip6_fragment(), the following code will discard the skb. ip6_fragment(...) { if (!skb->local_df) { ... return -EMSGSIZE; } ... } SCTP do the following step: 1. send packet ip6_xmit(skb, ipfragok=0) 2. received ICMP packet too big message 3. if PMTUD_ENABLE: ip6_xmit(skb, ipfragok=1) This patch fixed the problem by set local_df if ipfragok is true. Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ip6_output.c')
-rw-r--r--net/ipv6/ip6_output.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 6811901e6b1e..a027003d69a4 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -236,6 +236,10 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl,
skb_reset_network_header(skb);
hdr = ipv6_hdr(skb);
+ /* Allow local fragmentation. */
+ if (ipfragok)
+ skb->local_df = 1;
+
/*
* Fill in the IPv6 header
*/