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try using reversed IP_MULTICAST_LOOP semantics for windows

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This commit is contained in:
Paul Davis 2016-01-18 18:15:48 -05:00
parent cd27f742d4
commit a4271b8560
1 changed files with 6 additions and 33 deletions
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39
libs/midi++2/ipmidi_port.cc
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@ -231,48 +231,21 @@ IPMIDIPort::open_sockets (int base_port, const string& ifname)
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);
// Turn off loopback...
int loop = 0;
if (::bind(sockout, (struct sockaddr *) (&any), sizeof(any)) < 0) {
::perror("bind");
cout << "ipmidi bind error\n";
return false;
}
#ifndef PLATFORM_WINDOWS
int loop;
socklen_t size;
#ifdef PLATFORM_WINDOWS
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) {
if (::setsockopt (target_sock, IPPROTO_IP, IP_MULTICAST_LOOP, (char *) &loop, sizeof (loop)) < 0) {
//::perror("setsockopt(IP_MULTICAST_LOOP)");
cout << "Cannot set loopback status\n";
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)) {