2004-08-06 06:56:04 +02:00
|
|
|
/* Set source filter. Linux version.
|
2014-01-01 12:03:15 +01:00
|
|
|
Copyright (C) 2004-2014 Free Software Foundation, Inc.
|
2004-08-06 06:56:04 +02:00
|
|
|
This file is part of the GNU C Library.
|
|
|
|
Contributed by Ulrich Drepper <drepper@redhat.com>, 2004.
|
|
|
|
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
|
|
modify it under the terms of the GNU Lesser General Public
|
|
|
|
License as published by the Free Software Foundation; either
|
|
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
|
Lesser General Public License for more details.
|
|
|
|
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
2012-02-10 00:18:22 +01:00
|
|
|
License along with the GNU C Library; if not, see
|
|
|
|
<http://www.gnu.org/licenses/>. */
|
2004-08-06 06:56:04 +02:00
|
|
|
|
|
|
|
#include <alloca.h>
|
|
|
|
#include <errno.h>
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <string.h>
|
2013-05-01 17:46:34 +02:00
|
|
|
#include <stdint.h>
|
2004-08-06 06:56:04 +02:00
|
|
|
#include <netinet/in.h>
|
|
|
|
#include <sys/socket.h>
|
|
|
|
|
|
|
|
|
2004-08-06 11:25:59 +02:00
|
|
|
/* Defined in getsourcefilter.c. */
|
|
|
|
extern int __get_sol (int af, socklen_t len);
|
|
|
|
|
|
|
|
|
2004-08-06 06:56:04 +02:00
|
|
|
int
|
2004-08-07 20:22:26 +02:00
|
|
|
setsourcefilter (int s, uint32_t interface, const struct sockaddr *group,
|
2004-08-06 06:56:04 +02:00
|
|
|
socklen_t grouplen, uint32_t fmode, uint32_t numsrc,
|
2004-08-07 20:22:26 +02:00
|
|
|
const struct sockaddr_storage *slist)
|
2004-08-06 06:56:04 +02:00
|
|
|
{
|
|
|
|
/* We have to create an struct ip_msfilter object which we can pass
|
|
|
|
to the kernel. */
|
|
|
|
size_t needed = GROUP_FILTER_SIZE (numsrc);
|
2004-08-06 11:25:59 +02:00
|
|
|
int use_alloca = __libc_use_alloca (needed);
|
2004-08-06 06:56:04 +02:00
|
|
|
|
|
|
|
struct group_filter *gf;
|
2004-08-06 11:25:59 +02:00
|
|
|
if (use_alloca)
|
|
|
|
gf = (struct group_filter *) alloca (needed);
|
|
|
|
else
|
2004-08-06 06:56:04 +02:00
|
|
|
{
|
|
|
|
gf = (struct group_filter *) malloc (needed);
|
|
|
|
if (gf == NULL)
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
gf->gf_interface = interface;
|
|
|
|
memcpy (&gf->gf_group, group, grouplen);
|
|
|
|
gf->gf_fmode = fmode;
|
|
|
|
gf->gf_numsrc = numsrc;
|
|
|
|
memcpy (gf->gf_slist, slist, numsrc * sizeof (struct sockaddr_storage));
|
|
|
|
|
2004-08-06 11:25:59 +02:00
|
|
|
/* We need to provide the appropriate socket level value. */
|
2006-04-07 06:29:25 +02:00
|
|
|
int result;
|
2004-08-06 11:25:59 +02:00
|
|
|
int sol = __get_sol (group->sa_family, grouplen);
|
|
|
|
if (sol == -1)
|
|
|
|
{
|
|
|
|
__set_errno (EINVAL);
|
2006-04-07 06:29:25 +02:00
|
|
|
result = -1;
|
2004-08-06 11:25:59 +02:00
|
|
|
}
|
2006-04-07 06:29:25 +02:00
|
|
|
else
|
|
|
|
result = __setsockopt (s, sol, MCAST_MSFILTER, gf, needed);
|
2004-08-06 06:56:04 +02:00
|
|
|
|
2004-08-06 11:25:59 +02:00
|
|
|
if (! use_alloca)
|
2004-08-06 06:56:04 +02:00
|
|
|
{
|
|
|
|
int save_errno = errno;
|
|
|
|
free (gf);
|
|
|
|
__set_errno (save_errno);
|
|
|
|
}
|
|
|
|
|
|
|
|
return result;
|
|
|
|
}
|