.\" Copyright, the authors of the Linux man-pages project
.\"
.\" SPDX-License-Identifier: Linux-man-pages-copyleft
.\"
.TH ip_mreq_source 2type 2025-11-25 "Linux man-pages 6.17"
.SH NAME
ip_mreq_source
\-
IP multicast request source
.SH LIBRARY
Standard C library
.RI ( libc )
.SH SYNOPSIS
.nf
.B #include <netinet/in.h>
.fi
.P
.EX
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 */
};
.EE
.SH DESCRIPTION
The
.I ip_mreq_source
structure is similar to the
.BR ip_mreqn (2type)
structure.
.TP
.I .imr_multiaddr
The address of the multicast group
the application wants to join or leave.
.TP
.I .imr_interface
The address of the local interface with which
the system should join or leave the multicast group.
.TP
.I .imr_sourceaddr
The address of the source
the application wants to receive data from.
.SH HISTORY
Linux 2.4.22, Linux 2.5.68.
.SH SEE ALSO
.BR IP_ADD_SOURCE_MEMBERSHIP (2const),
.BR IP_BLOCK_SOURCE (2const),
.BR IP_DROP_SOURCE_MEMBERSHIP (2const),
.BR IP_UNBLOCK_SOURCE (2const),
.BR ip (7).