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| author | Michael Kerrisk <mtk.manpages@gmail.com> | 2005-12-14 10:27:30 +0000 |
|---|---|---|
| committer | Michael Kerrisk <mtk.manpages@gmail.com> | 2005-12-14 10:27:30 +0000 |
| commit | 514d7e5b9262ecf21f936f131bf6a6e2f6a7c3c7 (patch) | |
| tree | b949e5d8c0053ba7b3ec1ab00bd386861ff61d58 /man7/socket.7 | |
| parent | 9ae132041b6eff3788dff5a6a1d3fa45ae6f9e19 (diff) | |
| download | man-pages-514d7e5b9262ecf21f936f131bf6a6e2f6a7c3c7.tar.gz | |
Updated discussion of SO_BSDCOMPAT.
Reformatted some long lines.
Diffstat (limited to 'man7/socket.7')
| -rw-r--r-- | man7/socket.7 | 34 |
1 files changed, 19 insertions, 15 deletions
diff --git a/man7/socket.7 b/man7/socket.7 index 9f87550343..c517bfd145 100644 --- a/man7/socket.7 +++ b/man7/socket.7 @@ -205,12 +205,13 @@ with the socket level set to for all sockets: .TP .B SO_KEEPALIVE -Enable sending of keep-alive messages on connection-oriented sockets. Expects -an integer boolean flag. +Enable sending of keep-alive messages on connection-oriented sockets. +Expects an integer boolean flag. .TP .B SO_OOBINLINE -If this option is enabled, out-of-band data is directly placed into the receive -data stream. Otherwise out-of-band data is only passed when the +If this option is enabled, +out-of-band data is directly placed into the receive data stream. +Otherwise out-of-band data is only passed when the .B MSG_OOB flag is set during receiving. .\" don't document it because it can do too much harm. @@ -264,13 +265,16 @@ If the timeout is set to zero (the default) then the operation will never timeout. .TP .B SO_BSDCOMPAT -Enable BSD bug-to-bug compatibility. This is used only by the UDP -protocol module and scheduled to be removed in future. +Enable BSD bug-to-bug compatibility. +This is used by the UDP protocol module in Linux 2.0 and 2.2. If enabled ICMP errors received for a UDP socket will not be passed -to the user program. Linux 2.0 also enabled BSD bug-to-bug compatibility +to the user program. +In later kernel versions, support for this option has been phased out: +Linux 2.4 silently ignores it, and Linux 2.6 generates kernel warning +(printk()) if a program uses this option. +Linux 2.0 also enabled BSD bug-to-bug compatibility options (random header changing, skipping of the broadcast flag) for raw -sockets with this option, but that has been removed in Linux 2.2. It is -better to fix the user programs than to enable this flag. +sockets with this option, but that was removed in Linux 2.2. .TP .B SO_PASSCRED Enable or disable the receiving of the @@ -366,16 +370,16 @@ packets to a broadcast address. This option has no effect on stream-oriented sockets. .TP .B SO_SNDBUF -Sets or gets the maximum socket send buffer in bytes. The default value is set -by the +Sets or gets the maximum socket send buffer in bytes. +The default value is set by the .B wmem_default sysctl and the maximum allowed value is set by the .B wmem_max sysctl. .TP .B SO_RCVBUF -Sets or gets the maximum socket receive buffer in bytes. The default value is -set by the +Sets or gets the maximum socket receive buffer in bytes. +The default value is set by the .B rmem_default sysctl and the maximum allowed value is set by the .B rmem_max @@ -573,8 +577,8 @@ capability or an effective UID of 0. .B FIOASYNC Change the .B O_ASYNC -flag to enable or disable asynchronous IO mode of the socket. Asynchronous IO -mode means that the +flag to enable or disable asynchronous IO mode of the socket. +Asynchronous IO mode means that the .B SIGIO signal or the signal set with .B F_SETSIG |