1 /* Set IPv4 source filter. Linux version.
2 Copyright (C) 2004-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
23 #include <netinet/in.h>
24 #include <scratch_buffer.h>
25 #include <sys/socket.h>
29 setipv4sourcefilter (int s
, struct in_addr interface
, struct in_addr group
,
30 uint32_t fmode
, uint32_t numsrc
,
31 const struct in_addr
*slist
)
33 /* We have to create an struct ip_msfilter object which we can pass
35 size_t needed
= IP_MSFILTER_SIZE (numsrc
);
37 struct scratch_buffer buf
;
38 scratch_buffer_init (&buf
);
39 if (!scratch_buffer_set_array_size (&buf
, 1, needed
))
41 struct ip_msfilter
*imsf
= buf
.data
;
43 imsf
->imsf_multiaddr
= group
;
44 imsf
->imsf_interface
= interface
;
45 imsf
->imsf_fmode
= fmode
;
46 imsf
->imsf_numsrc
= numsrc
;
47 memcpy (imsf
->imsf_slist
, slist
, numsrc
* sizeof (struct in_addr
));
49 int result
= __setsockopt (s
, SOL_IP
, IP_MSFILTER
, imsf
, needed
);
51 scratch_buffer_free (&buf
);