70 	int fd, yes = 1, err = -EINVAL;  in umcast_open()  local
78 	fd = socket(AF_INET, SOCK_DGRAM, 0);  in umcast_open()
80 	if (fd < 0) {  in umcast_open()
87 	if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) < 0) {  in umcast_open()
96 		if (setsockopt(fd, SOL_IP, IP_MULTICAST_TTL, &pri->ttl,  in umcast_open()
105 		if (setsockopt(fd, SOL_IP, IP_MULTICAST_LOOP,  in umcast_open()
115 	if (bind(fd, (struct sockaddr *) lsin, sizeof(*lsin)) < 0) {  in umcast_open()
126 		if (setsockopt(fd, SOL_IP, IP_ADD_MEMBERSHIP,  in umcast_open()
140 	return fd;  in umcast_open()
143 	close(fd);  in umcast_open()
148 static void umcast_close(int fd, void *data)  in umcast_close()  argument
158 		if (setsockopt(fd, SOL_IP, IP_DROP_MEMBERSHIP,  in umcast_close()
165 	close(fd);  in umcast_close()
168 int umcast_user_write(int fd, void *buf, int len, struct umcast_data *pri)  in umcast_user_write()  argument
172 	return net_sendto(fd, buf, len, data_addr, sizeof(*data_addr));  in umcast_user_write()