Commit 052e0690 authored Jul 10, 2019 by Eric Dumazet Committed by David S. Miller Jul 11, 2019

ipv6: tcp: fix flowlabels reflection for RST packets



In 323a53c4 ("ipv6: tcp: enable flowlabel reflection in some RST packets")
and 50a8accf ("ipv6: tcp: send consistent flowlabel in TIME_WAIT state")
we took care of IPv6 flowlabel reflections for two cases.

This patch takes care of the remaining case, when the RST packet
is sent on behalf of a 'full' socket.

In Marek use case, this was a socket in TCP_CLOSE state.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Marek Majkowski <marek@cloudflare.com>
Tested-by: Marek Majkowski <marek@cloudflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 416e8126

net/ipv6/tcp_ipv6.c

+6 −1

Original line number	Diff line number	Diff line
		@@ -984,8 +984,13 @@ static void tcp_v6_send_reset(const struct sock sk, struct sk_buff skb)

		if (sk) {
		oif = sk->sk_bound_dev_if;
		if (sk_fullsock(sk))
		if (sk_fullsock(sk)) {
		const struct ipv6_pinfo *np = tcp_inet6_sk(sk);

		trace_tcp_send_reset(sk, skb);
		if (np->repflow)
		label = ip6_flowlabel(ipv6h);
		}
		if (sk->sk_state == TCP_TIME_WAIT)
		label = cpu_to_be32(inet_twsk(sk)->tw_flowlabel);
		} else {

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