addrout.sin_addr.s_addr = ::inet_addr("225.0.0.37");
addrout.sin_port = htons (base_port);
- struct sockaddr_in any;
- ::memset(&any, 0, sizeof(struct sockaddr_in));
- addrout.sin_family = AF_INET;
- addrout.sin_addr.s_addr = INADDR_ANY;
- addrout.sin_port = htons (base_port);
-
- if (::bind(sockout, (struct sockaddr *) (&any), sizeof(any)) < 0) {
- ::perror("bind");
- cout << "ipmidi bind error\n";
- return false;
- }
+ // Turn off loopback...
+ int loop = 0;
+
+#ifdef PLATFORM_WINDOWS
+
+ /* https://msdn.microsoft.com/en-us/library/windows/desktop/ms739161%28v=vs.85%29.aspx
+ *
+ * ------------------------------------------------------------------------------
+ * Note The Winsock version of the IP_MULTICAST_LOOP option is
+ * semantically different than the UNIX version of the
+ * IP_MULTICAST_LOOP option:
+ *
+ * In Winsock, the IP_MULTICAST_LOOP option applies only to the receive path.
+ * In the UNIX version, the IP_MULTICAST_LOOP option applies to the send path.
+ *
+ * For example, applications ON and OFF (which are easier to track than
+ * X and Y) join the same group on the same interface; application ON
+ * sets the IP_MULTICAST_LOOP option on, application OFF sets the
+ * IP_MULTICAST_LOOP option off. If ON and OFF are Winsock
+ * applications, OFF can send to ON, but ON cannot sent to OFF. In
+ * contrast, if ON and OFF are UNIX applications, ON can send to OFF,
+ * but OFF cannot send to ON.
+ * ------------------------------------------------------------------------------
+ *
+ * Alles klar? Gut!
+ */
-#ifndef PLATFORM_WINDOWS
- int loop;
- socklen_t size;
+ const int target_sock = sockin;
#else
- u_char loop;
- int size;
+ const int target_sock = sockout;
#endif
- if (::getsockopt (sockout, IPPROTO_IP, IP_MULTICAST_LOOP, (char *) &loop, &size)) {
- // ::perror ("getsockopt(IP_MULTICAST_LOOP)");
- cout << "Cannot get loopback status\n";
- } else {
- cout << "********* 1. multicast loopback: " << loop << " size was " << size << endl;
- }
-
- // Turn off loopback...
- loop = 0;
- if (::setsockopt(sockout, IPPROTO_IP, IP_MULTICAST_LOOP, (char *) &loop, sizeof (loop)) < 0) {
- //::perror("setsockopt(IP_MULTICAST_LOOP)");
- cout << "Cannot set loopback status\n";
+ if (::setsockopt (target_sock, IPPROTO_IP, IP_MULTICAST_LOOP, (char *) &loop, sizeof (loop)) < 0) {
+ ::perror("setsockopt(IP_MULTICAST_LOOP)");
return false;
}
- if (::getsockopt (sockout, IPPROTO_IP, IP_MULTICAST_LOOP, (char *) &loop, &size)) {
- // ::perror ("getsockopt(IP_MULTICAST_LOOP)");
- cout << "Cannot Get loopback status 2\n";
- } else {
- cout << "********* 2. multicast loopback: " << loop << " size was " << size << endl;
- }
-
#ifndef PLATFORM_WINDOWS
if (fcntl (sockin, F_SETFL, O_NONBLOCK)) {
return false;
}
#endif
- cout << "ipmidi ports setup!!!!!!!\n";
+
return true;
}