The branch main has been updated by tuexen: URL: https://cgit.FreeBSD.org/src/commit/?id=e8c149ab85c7834f76325864f22ca89298e65f75
commit e8c149ab85c7834f76325864f22ca89298e65f75 Author: Michael Tuexen <[email protected]> AuthorDate: 2024-04-07 20:41:24 +0000 Commit: Michael Tuexen <[email protected]> CommitDate: 2024-04-07 20:41:24 +0000 tcp: add some debug output Also log, when dropping text or FIN after having received a FIN. This is the intended behavior described in RFC 9293. A follow-up patch will enforce this behavior for the base stack and the RACK stack. Reviewed by: rscheff MFC after: 3 days Sponsored by: Netflix, Inc. Differential Revision: https://reviews.freebsd.org/D44669 --- sys/netinet/tcp_input.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c index d27a79d1c3b1..1c6bdedc9368 100644 --- a/sys/netinet/tcp_input.c +++ b/sys/netinet/tcp_input.c @@ -3272,6 +3272,35 @@ dodata: /* XXX */ len = so->so_rcv.sb_hiwat; #endif } else { + if ((s = tcp_log_addrs(inc, th, NULL, NULL))) { + if (tlen > 0) { + if ((thflags & TH_FIN) != 0) { + log(LOG_DEBUG, "%s; %s: %s: " + "Received %d bytes of data and FIN " + "after having received a FIN, " + "just dropping both\n", + s, __func__, + tcpstates[tp->t_state], tlen); + } else { + log(LOG_DEBUG, "%s; %s: %s: " + "Received %d bytes of data " + "after having received a FIN, " + "just dropping it\n", + s, __func__, + tcpstates[tp->t_state], tlen); + } + } else { + if ((thflags & TH_FIN) != 0) { + log(LOG_DEBUG, "%s; %s: %s: " + "Received FIN " + "after having received a FIN, " + "just dropping it\n", + s, __func__, + tcpstates[tp->t_state]); + } + } + free(s, M_TCPLOG); + } m_freem(m); thflags &= ~TH_FIN; }
