[Bug 250499] [tcp] Should we reject the packet with timestamp if no timestamp in SYN and SYN_ACK?

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=250499

--- Comment #1 from commit-hook at FreeBSD.org ---
A commit references this bug:

Author: tuexen
Date: Mon Nov  9 21:49:42 UTC 2020
New revision: 367530
URL: https://svnweb.freebsd.org/changeset/base/367530

Log:
  RFC 7323 specifies that:
  * TCP segments without timestamps should be dropped when support for
    the timestamp option has been negotiated.
  * TCP segments with timestamps should be processed normally if support
    for the timestamp option has not been negotiated.
  This patch enforces the above.

  PR:                   250499
  Reviewed by:          gnn, rrs
  MFC after:            1 week
  Sponsored by:         Netflix, Inc
  Differential Revision:        https://reviews.freebsd.org/D27148

Changes:
  head/sys/netinet/tcp_input.c
  head/sys/netinet/tcp_stacks/bbr.c
  head/sys/netinet/tcp_stacks/rack.c
  head/sys/netinet/tcp_syncache.c
  head/sys/netinet/tcp_timewait.c

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