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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | ERRORS | STANDARDS | HISTORY | SEE ALSO | COLOPHON |
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IP_MSFILTER(2const) IP_MSFILTER(2const)
IP_MSFILTER - multicast source filtering
Standard C library (libc, -lc)
#include <netinet/in.h> /* Definition of IP* constants */
#include <sys/socket.h>
int setsockopt(int sockfd, IPPROTO_IP, IP_MSFILTER,
const struct ip_msfilter *val,
sizeof(struct ip_msfilter));
struct ip_msfilter {
struct in_addr imsf_multiaddr; // IP multicast group address
struct in_addr imsf_interface; // IP address of local interface
uint32_t imsf_fmode; // Filter-mode
uint32_t imsf_numsrc; // Number of elements in .imsf_slist
struct in_addr imsf_slist[1]; // Array of source addresses
};
This option provides access to the advanced full-state filtering
API.
There are two macros, MCAST_INCLUDE and MCAST_EXCLUDE, which can
be used to specify the filtering mode.
Additionally, the IP_MSFILTER_SIZE(n) macro exists to determine
how much memory is needed to store ip_msfilter structure with n
sources in the source list.
For the full description of multicast source filtering refer to
RFC 3376.
See IPRROTO_IP(2const). See setsockopt(2). See ip(7).
Linux.
Linux 2.4.22, Linux 2.5.68.
IPPROTO_IP(2const), setsockopt(2), ip(7)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
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for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
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Linux man-pages 6.18 2025-11-25 IP_MSFILTER(2const)
Pages that refer to this page: IPPROTO_IP(2const)
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HTML rendering created 2026-05-24 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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