Commit 507a9673 authored by Eric Dumazet's avatar Eric Dumazet Committed by Jakub Kicinski
Browse files

ipv6: tcp: give socket pointer to control skbs 



tcp_v6_send_response() send orphaned 'control packets'.

These are RST packets and also ACK packets sent from TIME_WAIT.

Some eBPF programs would prefer to have a meaningful skb->sk
pointer as much as possible.

This means that TCP can now attach TIME_WAIT sockets to outgoing
skbs.

Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Reviewed-by: default avatarKuniyuki Iwashima <kuniyu@amazon.com>
Reviewed-by: default avatarBrian Vazquez <brianvv@google.com>
Link: https://patch.msgid.link/20241010174817.1543642-5-edumazet@google.com


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 5ced52fa

net/ipv6/tcp_ipv6.c

+3 −0
Original line number Diff line number Diff line
@@ -967,6 +967,9 @@ static void tcp_v6_send_response(const struct sock *sk, struct sk_buff *skb, u32 
	}



	if (sk) {

		/* unconstify the socket only to attach it to buff with care. */

		skb_set_owner_edemux(buff, (struct sock *)sk);



		if (sk->sk_state == TCP_TIME_WAIT)

			mark = inet_twsk(sk)->tw_mark;

		else