diff options
| author | Paul Davis <paul@linuxaudiosystems.com> | 2016-01-18 16:38:25 -0500 |
|---|---|---|
| committer | Paul Davis <paul@linuxaudiosystems.com> | 2016-01-18 16:38:25 -0500 |
| commit | 3fc50258b8b7d51898dd95eb19244cbc0f2675c5 (patch) | |
| tree | b1b0e4d313a249989c3ddd7382d1d83f453d3bb9 /libs | |
| parent | 650ee5a3178960c394c29750f69122398b59fd38 (diff) | |
debug IP multicast loopback
Diffstat (limited to 'libs')
| -rw-r--r-- | libs/midi++2/ipmidi_port.cc | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/libs/midi++2/ipmidi_port.cc b/libs/midi++2/ipmidi_port.cc index 6955bd9f86..be271f4025 100644 --- a/libs/midi++2/ipmidi_port.cc +++ b/libs/midi++2/ipmidi_port.cc @@ -194,7 +194,7 @@ IPMIDIPort::open_sockets (int base_port, const string& ifname) #endif struct ip_mreq mreq; - mreq.imr_multiaddr.s_addr = ::inet_addr("225.0.0.37"); + mreq.imr_multiaddr.s_addr = ::inet_addr("225.0.0.37"); /* ipMIDI group multicast address */ mreq.imr_interface.s_addr = if_addr_in.s_addr; if(::setsockopt (sockin, IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *) &mreq, sizeof(mreq)) < 0) { ::perror("setsockopt(IP_ADD_MEMBERSHIP)"); @@ -231,13 +231,27 @@ 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); + int loop; + socklen_t size; + if (::getsockopt (sockin, IPPROTO_IP, IP_MULTICAST_LOOP, &loop, &size)) { + ::perror ("getsockopt(IP_MULTICAST_LOOP)"); + } else { + cout << "********* 1. multicast loopback: " << loop << " size was " << size << endl; + } + // Turn off loopback... - int loop = 0; + loop = 0; if (::setsockopt(sockout, IPPROTO_IP, IP_MULTICAST_LOOP, (char *) &loop, sizeof (loop)) < 0) { ::perror("setsockopt(IP_MULTICAST_LOOP)"); return false; } + if (::getsockopt (sockin, IPPROTO_IP, IP_MULTICAST_LOOP, &loop, &size)) { + ::perror ("getsockopt(IP_MULTICAST_LOOP)"); + } else { + cout << "********* 2. multicast loopback: " << loop << " size was " << size << endl; + } + #ifndef PLATFORM_WINDOWS if (fcntl (sockin, F_SETFL, O_NONBLOCK)) { |