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Document SO_PROTOCOL socket option.

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Discussed with:	bz
Reviewed by:	glebius
MFC after:	2 weeks
This commit is contained in:
Konstantin Belousov 2012-02-26 13:57:24 +00:00
parent 747d2fa178
commit 1d2ea43149
1 changed files with 13 additions and 2 deletions
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15
lib/libc/sys/getsockopt.2
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@ -28,7 +28,7 @@
.\" @(#)getsockopt.2 8.4 (Berkeley) 5/2/95
.\" $FreeBSD$
.\"
.Dd November 21, 2011
.Dd February 26, 2012
.Dt GETSOCKOPT 2
.Os
.Sh NAME
@ -172,6 +172,8 @@ for the socket
.It Dv SO_BINTIME Ta "enables reception of a timestamp with datagrams"
.It Dv SO_ACCEPTCONN Ta "get listening status of the socket (get only)"
.It Dv SO_TYPE Ta "get the type of the socket (get only)"
.It Dv SO_PROTOCOL Ta "get the protocol number for the socket (get only)"
.It Dv SO_PROTOTYPE Ta "SunOS alias for the Linux SO_PROTOCOL (get only)"
.It Dv SO_ERROR Ta "get and clear error on the socket (get only)"
.It Dv SO_SETFIB Ta "set the associated FIB (routing table) for the socket (set only)"
.El
@ -449,7 +451,10 @@ and for
.Ed
.Pp
.Dv SO_ACCEPTCONN ,
.Dv SO_TYPE
.Dv SO_TYPE ,
.Dv SO_PROTOCOL
(and its alias
.Dv SO_PROTOTYPE )
and
.Dv SO_ERROR
are options used only with
@ -463,6 +468,12 @@ system call was invoked on the socket.
returns the type of the socket, such as
.Dv SOCK_STREAM ;
it is useful for servers that inherit sockets on startup.
.Dv SO_PROTOCOL
returns the protocol number for the socket, for
.Dv AF_INET
and
.Dv AF_INET6
address families.
.Dv SO_ERROR
returns any pending error on the socket and clears
the error status.