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| author | Neal Cardwell <ncardwell@google.com> | 2012-04-22 09:45:47 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-04-22 17:09:35 -0400 |
| commit | d135c522f1234f62e81be29cebdf59e9955139ad (patch) | |
| tree | 7e151f3995d6a30499c2bec2c07b2bf68754788e | |
| parent | 163faf31778e536ac6125bc8b14f4667adc910e9 (diff) | |
| download | linux-3.10-d135c522f1234f62e81be29cebdf59e9955139ad.tar.gz linux-3.10-d135c522f1234f62e81be29cebdf59e9955139ad.tar.bz2 linux-3.10-d135c522f1234f62e81be29cebdf59e9955139ad.zip | |
tcp: fix TCP_MAXSEG for established IPv6 passive sockets
Commit f5fff5d forgot to fix TCP_MAXSEG behavior IPv6 sockets, so IPv6
TCP server sockets that used TCP_MAXSEG would find that the advmss of
child sockets would be incorrect. This commit mirrors the advmss logic
from tcp_v4_syn_recv_sock in tcp_v6_syn_recv_sock. Eventually this
logic should probably be shared between IPv4 and IPv6, but this at
least fixes this issue.
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv6/tcp_ipv6.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 86cfe6005f4..98256cf72f9 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -1383,6 +1383,10 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb, tcp_mtup_init(newsk); tcp_sync_mss(newsk, dst_mtu(dst)); newtp->advmss = dst_metric_advmss(dst); + if (tcp_sk(sk)->rx_opt.user_mss && + tcp_sk(sk)->rx_opt.user_mss < newtp->advmss) + newtp->advmss = tcp_sk(sk)->rx_opt.user_mss; + tcp_initialize_rcv_mss(newsk); if (tcp_rsk(req)->snt_synack) tcp_valid_rtt_meas(newsk, |