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| author | Rick Jones <rick.jones2@hp.com> | 2006-03-20 22:40:29 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2006-03-20 22:40:29 -0800 |
| commit | 15d99e02babae8bc20b836917ace07d93e318149 (patch) | |
| tree | 6a8941a3ef45f831161730aeee4a2fcc18cca78a /Documentation | |
| parent | c1b1bce8527c2c3cac7e2520ca54b7c04281033e (diff) | |
| download | linux-15d99e02babae8bc20b836917ace07d93e318149.tar.gz | |
[TCP]: sysctl to allow TCP window > 32767 sans wscale
Back in the dark ages, we had to be conservative and only allow 15-bit
window fields if the window scale option was not negotiated. Some
ancient stacks used a signed 16-bit quantity for the window field of
the TCP header and would get confused.
Those days are long gone, so we can use the full 16-bits by default
now.
There is a sysctl added so that we can still interact with such old
stacks
Signed-off-by: Rick Jones <rick.jones2@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/networking/ip-sysctl.txt | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt index 651298ba019a8..f12007b80a466 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt @@ -355,6 +355,13 @@ somaxconn - INTEGER Defaults to 128. See also tcp_max_syn_backlog for additional tuning for TCP sockets. +tcp_workaround_signed_windows - BOOLEAN + If set, assume no receipt of a window scaling option means the + remote TCP is broken and treats the window as a signed quantity. + If unset, assume the remote TCP is not broken even if we do + not receive a window scaling option from them. + Default: 0 + IP Variables: ip_local_port_range - 2 INTEGERS |