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authorEric Dumazet <edumazet@google.com>2019-06-08 17:58:51 -0700
committerDavid S. Miller <davem@davemloft.net>2019-06-09 20:10:19 -0700
commitc67b85558ff20cb1ff20874461d12af456bee5d0 (patch)
tree74fbc1da8b19b683614d91c512a4a73c04a873a9 /net/ipv4/tcp_minisocks.c
parent6566cd3690c19759b57757b171e9d605bd38432b (diff)
ipv6: tcp: send consistent autoflowlabel in TIME_WAIT state
In case autoflowlabel is in action, skb_get_hash_flowi6() derives a non zero skb->hash to the flowlabel. If skb->hash is zero, a flow dissection is performed. Since all TCP skbs sent from ESTABLISH state inherit their skb->hash from sk->sk_txhash, we better keep a copy of sk->sk_txhash into the TIME_WAIT socket. After this patch, ACK or RST packets sent on behalf of a TIME_WAIT socket have the flowlabel that was previously used by the flow. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_minisocks.c')
-rw-r--r--net/ipv4/tcp_minisocks.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c
index 7c35731816e2..11011e8386dc 100644
--- a/net/ipv4/tcp_minisocks.c
+++ b/net/ipv4/tcp_minisocks.c
@@ -283,6 +283,7 @@ void tcp_time_wait(struct sock *sk, int state, int timeo)
tw->tw_v6_rcv_saddr = sk->sk_v6_rcv_saddr;
tw->tw_tclass = np->tclass;
tw->tw_flowlabel = be32_to_cpu(np->flow_label & IPV6_FLOWLABEL_MASK);
+ tw->tw_txhash = sk->sk_txhash;
tw->tw_ipv6only = sk->sk_ipv6only;
}
#endif