man socket_mcjoin6 () - join a multicast group
NAME
socket_mcjoin6 - join a multicast group
SYNTAX
#include <socket.h>
int socket_mcjoin6(int s,const char groupip[16],uint32 interface);
DESCRIPTION
socket_mcjoin6 joins the IPv6 multicast group groupip on interface.
If something goes wrong, socket_mcjoin6 returns -1, setting errno appropriately.