diff options
| -rw-r--r-- | man7/tcp.7 | 33 |
1 files changed, 17 insertions, 16 deletions
diff --git a/man7/tcp.7 b/man7/tcp.7 index 9f9c1c2b26..f567862ffe 100644 --- a/man7/tcp.7 +++ b/man7/tcp.7 @@ -13,7 +13,7 @@ .\" be more or less up to date and complete as at Linux 2.6.27 .\" (other than the remaining FIXMEs in the page source below). .\" -.TH TCP 7 2008-11-21 "Linux" "Linux Programmer's Manual" +.TH TCP 7 2008-12-01 "Linux" "Linux Programmer's Manual" .SH NAME tcp \- TCP protocol .SH SYNOPSIS @@ -954,6 +954,22 @@ Bound the size of the advertised window to this value. The kernel imposes a minimum size of SOCK_MIN_RCVBUF/2. This option should not be used in code intended to be portable. +.SS Sockets API +TCP provides limited support for out-of-band data, +in the form of (a single byte of) urgent data. +In Linux this means if the other end sends newer out-of-band +data the older urgent data is inserted as normal data into +the stream (even when +.B SO_OOBINLINE +is not set). +This differs from BSD-based stacks. +.PP +Linux uses the BSD compatible interpretation of the urgent +pointer field by default. +This violates RFC\ 1122, but is +required for interoperability with other stacks. +It can be changed via +.IR /proc/sys/net/ipv4/tcp_stdurg . .SS Ioctls These following .BR ioctl (2) @@ -1058,21 +1074,6 @@ reordering support and some SACK extensions (DSACK) were introduced in 2.4. Support for forward acknowledgement (FACK), TIME_WAIT recycling, and per-connection keepalive socket options were introduced in 2.3. -.SH NOTES -TCP has no real out-of-band data; it has urgent data. -In Linux this means if the other end sends newer out-of-band -data the older urgent data is inserted as normal data into -the stream (even when -.B SO_OOBINLINE -is not set). -This differs from BSD-based stacks. -.PP -Linux uses the BSD compatible interpretation of the urgent -pointer field by default. -This violates RFC\ 1122, but is -required for interoperability with other stacks. -It can be changed via -.IR /proc/sys/net/ipv4/tcp_stdurg . .SH BUGS Not all errors are documented. .br |