// Constructor for a source-independent multicast group
Groupsock::Groupsock(UsageEnvironment& env, struct in_addr const& groupAddr,
Port port, u_int8_t ttl)
: OutputSocket(env, port),
deleteIfNoMembers(False), isSlave(False),
fDests(new destRecord(groupAddr, port, ttl, 0, NULL)),
fIncomingGroupEId(groupAddr, port.num(), ttl) {
if (!socketJoinGroup(env, socketNum(), groupAddr.s_addr)) {
if (DebugLevel >= 1) {
env << *this << ": failed to join group: "
<< env.getResultMsg() << "\n";
}
}
// Make sure we can get our source address:
if (ourIPAddress(env) == 0) {
if (DebugLevel >= 0) { // this is a fatal error
env << "Unable to determine our source address: "
<< env.getResultMsg() << "\n";
}
}
if (DebugLevel >= 2) env << *this << ": created\n";
}
void Groupsock::multicastSendOnly() {
socketLeaveGroup(env(), socketNum(), fIncomingGroupEId.groupAddress().s_addr);
for (destRecord* dests = fDests; dests != NULL; dests = dests->fNext) {
socketLeaveGroup(env(), socketNum(), dests->fGroupEId.groupAddress().s_addr);
}
}
void Groupsock::joinGroup(netAddressBits groupAddress)
{
socketJoinGroup(env(), socketNum(), groupAddress);
}