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* [newlib-cygwin] TCP: send full initial window when timestamps are in use
@ 2022-07-11 11:52 Sebastian Huber
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From: Sebastian Huber @ 2022-07-11 11:52 UTC (permalink / raw)
To: newlib-cvs
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=7b30b9f648a25f3b615730864ddc86a433a93333
commit 7b30b9f648a25f3b615730864ddc86a433a93333
Author: Richard Scheffenegger <rscheff@FreeBSD.org>
Date: Fri Sep 25 10:38:19 2020 +0000
TCP: send full initial window when timestamps are in use
The fastpath in tcp_output tries to send out
full segments, and avoid sending partial segments by
comparing against the static t_maxseg variable.
That value does not consider tcp options like timestamps,
while the initial window calculation is using
the correct dynamic tcp_maxseg() function.
Due to this interaction, the last, full size segment
is considered too short and not sent out immediately.
Reviewed by: tuexen
MFC after: 2 weeks
Sponsored by: NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D26478
Diff:
---
newlib/libc/sys/rtems/include/netinet/tcp.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/newlib/libc/sys/rtems/include/netinet/tcp.h b/newlib/libc/sys/rtems/include/netinet/tcp.h
index 0a5226836..faf142959 100644
--- a/newlib/libc/sys/rtems/include/netinet/tcp.h
+++ b/newlib/libc/sys/rtems/include/netinet/tcp.h
@@ -80,6 +80,8 @@ struct tcphdr {
u_short th_urp; /* urgent pointer */
};
+#define PADTCPOLEN(len) ((((len) / 4) + !!((len) % 4)) * 4)
+
#define TCPOPT_EOL 0
#define TCPOLEN_EOL 1
#define TCPOPT_PAD 0 /* padding after EOL */
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2022-07-11 11:52 [newlib-cygwin] TCP: send full initial window when timestamps are in use Sebastian Huber
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