Date: Sun, 28 Feb 2021 08:22:36 GMT From: Richard Scheffenegger <rscheff@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: c0c928636156 - stable/13 - TCP_NOOPT may prevent the negotiation of TCP features, which a server has to take into consideration. Message-ID: <202102280822.11S8MakS093416@gitrepo.freebsd.org>
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The branch stable/13 has been updated by rscheff: URL: https://cgit.FreeBSD.org/src/commit/?id=c0c928636156dd913302bc34e5ac9d70810f5cdd commit c0c928636156dd913302bc34e5ac9d70810f5cdd Author: Richard Scheffenegger <rscheff@FreeBSD.org> AuthorDate: 2021-02-25 18:10:55 +0000 Commit: Richard Scheffenegger <rscheff@FreeBSD.org> CommitDate: 2021-02-28 08:11:18 +0000 TCP_NOOPT may prevent the negotiation of TCP features, which a server has to take into consideration. PR: 253576 Reviewed By: tuexen, #transport MFC after: 3 days Sponsored by: NetApp, Inc. Differential Revision: https://reviews.freebsd.org/D28652 (cherry picked from commit 2593f858d7d078efa85f78f20b6bfa0931cc1dc5) --- sys/netinet/tcp_input.c | 12 ++++++++---- sys/netinet/tcp_syncache.c | 3 ++- 2 files changed, 10 insertions(+), 5 deletions(-) diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c index e096f2a13679..42f983f64502 100644 --- a/sys/netinet/tcp_input.c +++ b/sys/netinet/tcp_input.c @@ -1649,7 +1649,8 @@ tcp_do_segment(struct mbuf *m, struct tcphdr *th, struct socket *so, TCPSTAT_INC(tcps_ecn_shs); } if ((to.to_flags & TOF_SCALE) && - (tp->t_flags & TF_REQ_SCALE)) { + (tp->t_flags & TF_REQ_SCALE) && + !(tp->t_flags & TF_NOOPT)) { tp->t_flags |= TF_RCVD_SCALE; tp->snd_scale = to.to_wscale; } else @@ -1660,7 +1661,8 @@ tcp_do_segment(struct mbuf *m, struct tcphdr *th, struct socket *so, */ tp->snd_wnd = th->th_win; if ((to.to_flags & TOF_TS) && - (tp->t_flags & TF_REQ_TSTMP)) { + (tp->t_flags & TF_REQ_TSTMP) && + !(tp->t_flags & TF_NOOPT)) { tp->t_flags |= TF_RCVD_TSTMP; tp->ts_recent = to.to_tsval; tp->ts_recent_age = tcp_ts_getticks(); @@ -1669,10 +1671,12 @@ tcp_do_segment(struct mbuf *m, struct tcphdr *th, struct socket *so, if (to.to_flags & TOF_MSS) tcp_mss(tp, to.to_mss); if ((tp->t_flags & TF_SACK_PERMIT) && - (to.to_flags & TOF_SACKPERM) == 0) + (!(to.to_flags & TOF_SACKPERM) || + (tp->t_flags & TF_NOOPT))) tp->t_flags &= ~TF_SACK_PERMIT; if (IS_FASTOPEN(tp->t_flags)) { - if (to.to_flags & TOF_FASTOPEN) { + if ((to.to_flags & TOF_FASTOPEN) && + !(tp->t_flags & TF_NOOPT)) { uint16_t mss; if (to.to_flags & TOF_MSS) diff --git a/sys/netinet/tcp_syncache.c b/sys/netinet/tcp_syncache.c index e59a41fc1102..771ff44b8924 100644 --- a/sys/netinet/tcp_syncache.c +++ b/sys/netinet/tcp_syncache.c @@ -1655,7 +1655,8 @@ skip_alloc: win = imin(win, TCP_MAXWIN); sc->sc_wnd = win; - if (V_tcp_do_rfc1323) { + if (V_tcp_do_rfc1323 && + !(ltflags & TF_NOOPT)) { /* * A timestamp received in a SYN makes * it ok to send timestamp requests and replies.
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