diff options
| author | dwmalone <dwmalone@FreeBSD.org> | 2006-06-19 12:33:52 +0000 |
|---|---|---|
| committer | dwmalone <dwmalone@FreeBSD.org> | 2006-06-19 12:33:52 +0000 |
| commit | 10047ad61993e797838e8e24e9c83f64fc5d9de5 (patch) | |
| tree | cfffb118d87d3063994930a58474b7562209b949 /sys/netinet | |
| parent | b24bbb5c56fbe33183b32a10701302ad941e47a1 (diff) | |
| download | FreeBSD-src-10047ad61993e797838e8e24e9c83f64fc5d9de5.zip FreeBSD-src-10047ad61993e797838e8e24e9c83f64fc5d9de5.tar.gz | |
When we receive an out-of-window SYN for an "ESTABLISHED" connection,
ACK the SYN as required by RFC793, rather than ignoring it. NetBSD
have had a similar change since 1999.
PR: 93236
Submitted by: Grant Edwards <grante@visi.com>
MFC after: 1 month
Diffstat (limited to 'sys/netinet')
| -rw-r--r-- | sys/netinet/tcp_input.c | 2 | ||||
| -rw-r--r-- | sys/netinet/tcp_reass.c | 2 |
2 files changed, 4 insertions, 0 deletions
diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c index 70b524c..7c59d2a 100644 --- a/sys/netinet/tcp_input.c +++ b/sys/netinet/tcp_input.c @@ -1786,6 +1786,8 @@ trimthenstep6: if (tp->t_state == TCPS_SYN_RECEIVED || (tp->t_flags & TF_NEEDSYN)) goto step6; + else if (tp->t_flags & TF_ACKNOW) + goto dropafterack; else goto drop; } diff --git a/sys/netinet/tcp_reass.c b/sys/netinet/tcp_reass.c index 70b524c..7c59d2a 100644 --- a/sys/netinet/tcp_reass.c +++ b/sys/netinet/tcp_reass.c @@ -1786,6 +1786,8 @@ trimthenstep6: if (tp->t_state == TCPS_SYN_RECEIVED || (tp->t_flags & TF_NEEDSYN)) goto step6; + else if (tp->t_flags & TF_ACKNOW) + goto dropafterack; else goto drop; } |
