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| author | Richard Scheffenegger <rscheff@FreeBSD.org> | 2020-09-25 10:38:19 +0000 |
|---|---|---|
| committer | Richard Scheffenegger <rscheff@FreeBSD.org> | 2020-09-25 10:38:19 +0000 |
| commit | e39956612370981605b903fd7609dca0db81a65c (patch) | |
| tree | f5ec0e7d99f4acc123a8ce6941579e262b576e16 /sys/netinet/tcp.h | |
| parent | 1567c937e2cb709355b1cc3b62c8438147d6e05b (diff) | |
| download | src-test2-e39956612370981605b903fd7609dca0db81a65c.tar.gz src-test2-e39956612370981605b903fd7609dca0db81a65c.zip | |
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
Notes
Notes:
svn path=/head/; revision=366150
Diffstat (limited to 'sys/netinet/tcp.h')
| -rw-r--r-- | sys/netinet/tcp.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/netinet/tcp.h b/sys/netinet/tcp.h index 0a5226836f0f..faf142959375 100644 --- a/sys/netinet/tcp.h +++ b/sys/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 */ |