socket_mcleave4(3) - Linux man page
Name
socket_mcleave4 - leave a multicast groupSyntax
#include <socket.h>int socket_mcleave4(int s, const char groupip[4]);
Description
socket_mcleave4 leaves the IPv4 multicast group groupip.If something goes wrong, socket_mcleave4 returns -1, setting errno appropriately.