108 lines
3.0 KiB
Groff
108 lines
3.0 KiB
Groff
.\" Copyright (c) 2008 Cisco Systems. All rights reserved.
|
|
.\" Author: Julian Elischer
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Neither the name of the Cisco Systems nor the names of its employees
|
|
.\" may be used to endorse or promote products derived from this software
|
|
.\" without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd March 19, 2012
|
|
.Dt SETFIB 2
|
|
.Os
|
|
.Sh NAME
|
|
.Nm setfib
|
|
.Nd set the default FIB (routing table) for the calling process.
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In sys/socket.h
|
|
.Ft int
|
|
.Fn setfib "int fib"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn setfib
|
|
system call sets the associated fib for all sockets opened
|
|
subsequent to the call, to be that of the argument
|
|
.Fa fib .
|
|
The
|
|
.Fa fib
|
|
argument
|
|
must be greater than or equal to 0
|
|
and less than the current system maximum which
|
|
may be retrieved by the
|
|
.Va net.fibs
|
|
sysctl.
|
|
The system maximum is set in the kernel configuration file with
|
|
.Bd -ragged -offset indent
|
|
.Cd "options ROUTETABLES=" Ns Em N
|
|
.Ed
|
|
.Pp
|
|
or in
|
|
.Pa /boot/loader.conf
|
|
with
|
|
.Pp
|
|
.Dl net.fibs= Ns Qq Em N
|
|
.Pp
|
|
where
|
|
.Em N
|
|
is an integer.
|
|
This maximum is capped at 65536 due to the implementation storing
|
|
the fib number in a 16-bit field in the
|
|
.Xr mbuf 9
|
|
packet header, however it is not suggested that one use such a large number
|
|
as memory is allocated for every FIB regardless of whether it is used, and
|
|
there are places where all FIBs are iterated over.
|
|
.Pp
|
|
The default fib of the process will be applied to all protocol families
|
|
that support multiple fibs, and ignored by those that do not.
|
|
The default fib for a process may be overridden for a socket with the use
|
|
of the
|
|
.Dv SO_SETFIB
|
|
socket option.
|
|
.Sh RETURN VALUES
|
|
.Rv -std setfib
|
|
.Sh ERRORS
|
|
The
|
|
.Fn setfib
|
|
system call
|
|
will fail and no action will be taken and return
|
|
.Er EINVAL
|
|
if the
|
|
.Fa fib
|
|
argument is greater than the current system maximum.
|
|
.Sh SEE ALSO
|
|
.Xr setfib 1 ,
|
|
.Xr setsockopt 2
|
|
.Sh STANDARDS
|
|
The
|
|
.Fn setfib
|
|
system call is a
|
|
.Fx
|
|
extension however similar extensions
|
|
have been added to many other
|
|
.Ux
|
|
style kernels.
|
|
.Sh HISTORY
|
|
The
|
|
.Fn setfib
|
|
function appeared in
|
|
.Fx 7.1 .
|