void IPNDAgent::send(const DiscoveryAnnouncement &a, const ibrcommon::vinterface &iface, const ibrcommon::vaddress &addr)
{
// serialize announcement
stringstream ss; ss << a;
const std::string data = ss.str();
ibrcommon::socketset fds = _send_socket.get(iface);
// send out discovery announcements on all bound sockets
// (hopefully only one per interface)
for (ibrcommon::socketset::const_iterator iter = fds.begin(); iter != fds.end(); ++iter)
{
ibrcommon::udpsocket &sock = dynamic_cast<ibrcommon::udpsocket&>(**iter);
try {
// prevent broadcasting in the wrong address family
if (addr.family() != sock.get_family()) continue;
sock.sendto(data.c_str(), data.length(), 0, addr);
} catch (const ibrcommon::socket_exception &e) {
IBRCOMMON_LOGGER_DEBUG_TAG(IPNDAgent::TAG, 5) << "can not send message to " << addr.toString() << " via " << sock.get_address().toString() << "/" << iface.toString() << "; socket exception: " << e.what() << IBRCOMMON_LOGGER_ENDL;
} catch (const ibrcommon::vaddress::address_exception &ex) {
IBRCOMMON_LOGGER_TAG(IPNDAgent::TAG, warning) << ex.what() << IBRCOMMON_LOGGER_ENDL;
}
}
}
void IPNDAgent::join(const ibrcommon::vinterface &iface, const ibrcommon::vaddress &addr) throw ()
{
IBRCOMMON_LOGGER_DEBUG_TAG(TAG, 10) << "Join on " << iface.toString() << " (" << addr.toString() << ", family: " << addr.family() << ")" << IBRCOMMON_LOGGER_ENDL;
// only join IPv6 and IPv4 addresses
if ((addr.family() != AF_INET) && (addr.family() != AF_INET6)) return;
// do not join on loopback interfaces
if (addr.isLocal()) return;
// create a multicast socket and bind to given addr
ibrcommon::multicastsocket *msock = new ibrcommon::multicastsocket(addr);
// if we are in UP state
if (_state) {
try {
// bring up
msock->up();
// listen to multicast addresses
for (std::set<ibrcommon::vaddress>::const_iterator it_addr = _destinations.begin(); it_addr != _destinations.end(); ++it_addr)
{
if (msock->get_family() != it_addr->family())
continue;
try {
msock->join(*it_addr, iface);
} catch (const ibrcommon::socket_raw_error &e) {
if (e.error() == EADDRINUSE) {
// silent error
} else if (e.error() == 92) {
// silent error - protocol not available
} else {
IBRCOMMON_LOGGER_TAG(IPNDAgent::TAG, warning) << "Join to " << (*it_addr).toString() << " failed on " << iface.toString() << "; " << e.what() << IBRCOMMON_LOGGER_ENDL;
}
} catch (const ibrcommon::socket_exception &e) {
IBRCOMMON_LOGGER_DEBUG_TAG(IPNDAgent::TAG, 10) << "Join to " << (*it_addr).toString() << " failed on " << iface.toString() << "; " << e.what() << IBRCOMMON_LOGGER_ENDL;
}
}
} catch (const ibrcommon::socket_exception &ex) {
IBRCOMMON_LOGGER_TAG(IPNDAgent::TAG, error) << "Join failed on " << iface.toString() << " (" << addr.toString() << ", family: " << addr.family() << ")" << "; " << ex.what() << IBRCOMMON_LOGGER_ENDL;
delete msock;
return;
}
}
// add multicast socket to _socket
_socket.add(msock, iface);
}
void IPNDAgent::leave(const ibrcommon::vinterface &iface, const ibrcommon::vaddress &addr) throw ()
{
IBRCOMMON_LOGGER_DEBUG_TAG(TAG, 10) << "Leave " << iface.toString() << " (" << addr.toString() << ", family: " << addr.family() << ")" << IBRCOMMON_LOGGER_ENDL;
// get all sockets bound to the given interface
ibrcommon::socketset ifsocks = _socket.get(iface);
for (ibrcommon::socketset::iterator it = ifsocks.begin(); it != ifsocks.end(); ++it)
{
ibrcommon::multicastsocket *msock = dynamic_cast<ibrcommon::multicastsocket*>(*it);
if (msock == NULL) continue;
if (msock->get_address() == addr) {
// remove the socket
_socket.remove(msock);
// shutdown the socket
try {
msock->down();
} catch (const ibrcommon::socket_exception &ex) {
IBRCOMMON_LOGGER_DEBUG_TAG(IPNDAgent::TAG, 10) << "leave failed: " << ex.what() << IBRCOMMON_LOGGER_ENDL;
}
// delete the socket
delete msock;
return;
}
}
}
void IPNDAgent::join(const ibrcommon::vinterface &iface, const ibrcommon::vaddress &addr) throw ()
{
// only join IPv6 and IPv4 addresses
if ((addr.family() != AF_INET) && (addr.family() != AF_INET6)) return;
// do not join on loopback interfaces
if (addr.isLocal()) return;
// create a multicast socket and bind to given addr
ibrcommon::multicastsocket *msock = new ibrcommon::multicastsocket(addr);
try {
// bring up
msock->up();
// add multicast socket to _socket
_socket.add(msock, iface);
} catch (const ibrcommon::socket_exception &ex) {
IBRCOMMON_LOGGER_TAG(IPNDAgent::TAG, error) << "Can not send on " << iface.toString() << " (" << addr.toString() << ", family: " << addr.family() << ")" << "; " << ex.what() << IBRCOMMON_LOGGER_ENDL;
delete msock;
}
}