uv_udp_set_membership  895 include/uv.h   UV_EXTERN int uv_udp_set_membership(uv_udp_t* handle,
uv_udp_set_membership  115 test/test-udp-multicast-join.c   r = uv_udp_set_membership(&client, "239.255.0.1", NULL, UV_JOIN_GROUP);