ip_mreqn(2type)

NAME
ip_mreqn, ip_mreq - IP multicast request index

LIBRARY
Standard C library (libc)

SYNOPSIS
#include <netinet/in.h>  /* Definition of IP* constants */

    struct ip_mreqn {
        struct in_addr  imr_multiaddr;  /* IP multicast group address */
        struct in_addr  imr_address;    /* IP address of local interface */
        int             imr_ifindex;    /* interface index */
    };

struct ip_mreq {
    struct in_addr  imr_multiaddr;  /* IP multicast group address */
    struct in_addr  imr_address;    /* IP address of local interface */
};

DESCRIPTION

.imr_multiaddr
    The address of the multicast group the application wants to join or leave. It must be a valid multicast address.

.imr_address
    The address of the local interface with which the system should join the multicast group; if it is equal to INADDR_ANY, an appropriate interface is chosen by the system.

.imr_ifindex
    The interface index of the interface that should join/leave the .imr_multiaddr group, or 0 to indicate any interface.

HISTORY

ip_mreqn
    Linux 2.2.

ip_mreq
    Linux 1.2.

SEE ALSO
IP_ADD_MEMBERSHIP(2const), IP_DROP_MEMBERSHIP(2const), IP_MULTICAST_IF(2const), ip(7)