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authorEric Dumazet <edumazet@google.com>2016-02-06 11:16:28 -0800
committerDavid S. Miller <davem@davemloft.net>2016-02-06 16:49:58 -0500
commite3e17b773bfe45462b7f3fae20c550025975cb13 (patch)
tree88f3bed2189c90a3eae7c2dbde31ca614da95e6e /net/ipv4/tcp_fastopen.c
parentMerge branch 'tipc-topology-updates' (diff)
downloadlinux-dev-e3e17b773bfe45462b7f3fae20c550025975cb13.tar.xz
linux-dev-e3e17b773bfe45462b7f3fae20c550025975cb13.zip
tcp: fastopen: call tcp_fin() if FIN present in SYNACK
When we acknowledge a FIN, it is not enough to ack the sequence number and queue the skb into receive queue. We also have to call tcp_fin() to properly update socket state and send proper poll() notifications. It seems we also had the problem if we received a SYN packet with the FIN flag set, but it does not seem an urgent issue, as no known implementation can do that. Fixes: 61d2bcae99f6 ("tcp: fastopen: accept data/FIN present in SYNACK message") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Yuchung Cheng <ycheng@google.com> Cc: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_fastopen.c')
-rw-r--r--net/ipv4/tcp_fastopen.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ipv4/tcp_fastopen.c b/net/ipv4/tcp_fastopen.c
index 6a6e11e54bae..fdb286ddba04 100644
--- a/net/ipv4/tcp_fastopen.c
+++ b/net/ipv4/tcp_fastopen.c
@@ -154,6 +154,9 @@ void tcp_fastopen_add_skb(struct sock *sk, struct sk_buff *skb)
* as we certainly are not changing upper 32bit value (0)
*/
tp->bytes_received = skb->len;
+
+ if (TCP_SKB_CB(skb)->tcp_flags & TCPHDR_FIN)
+ tcp_fin(sk);
}
static struct sock *tcp_fastopen_create_child(struct sock *sk,