man socket_mcleave6 () - leave a multicast group
NAME
socket_mcleave6 - leave a multicast group
SYNTAX
#include <socket.h>
int socket_mcleave6(int s, const char groupip[16]);
DESCRIPTION
socket_mcleave6 leaves the IPv6 multicast group groupip.
If something goes wrong, socket_mcleave6 returns -1, setting errno appropriately.