ip_mreq_source(2type) ip_mreq_source(2type) NAME ip_mreq_source - IP multicast request source LIBRARY Standard C library (libc) SYNOPSIS #include struct ip_mreq_source { struct in_addr imr_multiaddr; /* IP multicast group address */ struct in_addr imr_interface; /* IP address of local interface */ struct in_addr imr_sourceaddr; /* IP address of multicast source */ }; DESCRIPTION The ip_mreq_source structure is similar to the ip_mreqn(2type) structure. .imr_multiaddr The address of the multicast group the application wants to join or leave. .imr_interface The address of the local interface with which the system should join or leave the multicast group. .imr_sourceaddr The address of the source the application wants to receive data from. HISTORY Linux 2.4.22, Linux 2.5.68. SEE ALSO IP_ADD_SOURCE_MEMBERSHIP(2const), IP_BLOCK_SOURCE(2const), IP_DROP_SOURCE_MEMBERSHIP(2const), IP_UNBLOCK_SOURCE(2const), ip(7). Linux man-pages 6.17 2025-11-25 ip_mreq_source(2type)