+static int set_multicast(RtpSession *s)
+{
+ unsigned char loop = 1;
+ int ret;
+
+ ret = setsockopt(s->rtp.socket,
+ IPPROTO_IP, IP_MULTICAST_LOOP, &loop, sizeof(loop));
+ if (ret < 0) {
+ PARA_ERROR_LOG("IP_MULTICAST_LOOP error %d\n", ret);
+
+ }
+ return 1;
+}
+