Struct:group req

 
#include <trsocket.h>
 
/*
 * Structure used by setsockopt() options MCAST_JOIN_GROUP and
 * MCAST_LEAVE_GROUP to join or leave an IP multicast group
 * address (see RFC 3678 section 5.1).
 * Supports IPv4 (IGMP) and IPv6 (MLD).
 */
struct group_req
{
    ttUser32Bit             gr_interface; /* interface index */
    struct sockaddr_storage gr_group;     /* group address */
};
 

group_req Parameters

• gr_interface

  Index of the corresponding configured interface as returned by if_nametoindex(). Note that a zero index is valid if the user has either designated a default multicast interface for the socket via the IP_MULTICAST_IF or IPV6_MULTICAST_IF socket options, or designated a default multicast interface for the system via tfSetMcastInterface() or tf6SetMcastInterface().

• gr_group

  Destination multicast group address (IPv4 or IPv6).