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Add support for multicast communication with UML/QEMU/KVM.

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DeviceType = multicast allows one to specify a multicast address and port with
a Device statement. Tinc will then read/send packets to that multicast group
instead of to a tun/tap device. This allows interaction with UML, QEMU and KVM
instances that are listening on the same group.
This commit is contained in:
Guus Sliepen 2012-03-21 17:00:53 +01:00
parent a7dbb50c23
commit c373de2e98
7 changed files with 243 additions and 4 deletions
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8
src/net.c
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@ -286,9 +286,11 @@ static void check_network_activity(fd_set * readset, fd_set * writeset) {
/* check input from kernel */
if(device_fd >= 0 && FD_ISSET(device_fd, readset)) {
if(devops.read(&packet)) {
errors = 0;
packet.priority = 0;
route(myself, &packet);
if(packet.len) {
errors = 0;
packet.priority = 0;
route(myself, &packet);
}
} else {
usleep(errors * 50000);
errors++;