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| author | Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> | 2008-10-08 11:34:06 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-10-08 11:34:06 -0700 |
| commit | 52cd5750e81ec8d213949fa7c0d2e08907bf498b (patch) | |
| tree | 10e7a8127022e99bf6e729fe04420fa82a0997a8 /net/ipv4/tcp_ipv4.c | |
| parent | 2ca89cea5c9fdafd495fb840fa055383d253174e (diff) | |
| download | lwn-52cd5750e81ec8d213949fa7c0d2e08907bf498b.tar.gz lwn-52cd5750e81ec8d213949fa7c0d2e08907bf498b.zip | |
tcp: fix length used for checksum in a reset
While looking for some common code I came across difference
in checksum calculation between tcp_v6_send_(reset|ack) I
couldn't explain. I checked both v4 and v6 and found out that
both seem to have the same "feature". I couldn't find anything
in rfc nor anywhere else which would state that md5 option
should be ignored like it was in case of reset so I came to
a conclusion that this is probably a genuine bug. I suspect
that addition of md5 just was fooled by the excessive
copy-paste code in those functions and the reset part was
never tested well enough to find out the problem.
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_ipv4.c')
| -rw-r--r-- | net/ipv4/tcp_ipv4.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 24ffc5e1d3da..ba46769c6e97 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -589,7 +589,7 @@ static void tcp_v4_send_reset(struct sock *sk, struct sk_buff *skb) #endif arg.csum = csum_tcpudp_nofold(ip_hdr(skb)->daddr, ip_hdr(skb)->saddr, /* XXX */ - sizeof(struct tcphdr), IPPROTO_TCP, 0); + arg.iov[0].iov_len, IPPROTO_TCP, 0); arg.csumoffset = offsetof(struct tcphdr, check) / 2; arg.flags = (sk && inet_sk(sk)->transparent) ? IP_REPLY_ARG_NOSRCCHECK : 0; |