void IPNDAgent::join(const ibrcommon::vinterface &iface) throw ()
{
// register as discovery handler for this interface
dtn::core::BundleCore::getInstance().getDiscoveryAgent().registerService(iface, this);
// do not create sockets for any interface
if (!iface.isAny()) {
// subscribe to NetLink events on our interfaces
ibrcommon::LinkManager::getInstance().addEventListener(iface, this);
/**
* create sockets for each address on the interface
*/
const std::list<ibrcommon::vaddress> addrs = iface.getAddresses();
for (std::list<ibrcommon::vaddress>::const_iterator it = addrs.begin(); it != addrs.end(); ++it)
{
const ibrcommon::vaddress addr = (*it);
// join to all multicast addresses on this interface
join(iface, addr);
}
}
/**
* subscribe to multicast address on this interface using the sockets bound to any address
*/
const ibrcommon::vinterface any_iface(ibrcommon::vinterface::ANY);
ibrcommon::socketset anysocks = _socket.get(any_iface);
for (ibrcommon::socketset::iterator it = anysocks.begin(); it != anysocks.end(); ++it)
{
ibrcommon::multicastsocket *msock = dynamic_cast<ibrcommon::multicastsocket*>(*it);
if (msock == NULL) continue;
for (std::set<ibrcommon::vaddress>::const_iterator addr_it = _destinations.begin(); addr_it != _destinations.end(); ++addr_it)
{
const ibrcommon::vaddress &addr = (*addr_it);
// join only if family matches
if (addr.family() != msock->get_family()) continue;
try {
msock->join(addr, iface);
IBRCOMMON_LOGGER_DEBUG_TAG(IPNDAgent::TAG, 10) << "Joined " << addr.toString() << " on " << iface.toString() << IBRCOMMON_LOGGER_ENDL;
} 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 " << 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 " << addr.toString() << " failed on " << iface.toString() << "; " << e.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::listen(const ibrcommon::vinterface &iface) throw ()
{
// create sockets for all addresses on the interface
std::list<ibrcommon::vaddress> addrs = iface.getAddresses();
for (std::list<ibrcommon::vaddress>::iterator iter = addrs.begin(); iter != addrs.end(); ++iter) {
ibrcommon::vaddress &addr = (*iter);
try {
// handle the addresses according to their family
switch (addr.family()) {
case AF_INET:
case AF_INET6:
{
ibrcommon::udpsocket *sock = new ibrcommon::udpsocket(addr);
if (_send_socket_state) sock->up();
_send_socket.add(sock, iface);
break;
}
default:
break;
}
} catch (const ibrcommon::vaddress::address_exception &ex) {
IBRCOMMON_LOGGER_TAG(IPNDAgent::TAG, warning) << ex.what() << IBRCOMMON_LOGGER_ENDL;
} catch (const ibrcommon::socket_exception &ex) {
IBRCOMMON_LOGGER_TAG(IPNDAgent::TAG, warning) << ex.what() << IBRCOMMON_LOGGER_ENDL;
}
}
}
void IPNDAgent::join(const ibrcommon::vinterface &iface) throw ()
{
std::list<ibrcommon::vaddress> addrs = iface.getAddresses();
for (std::list<ibrcommon::vaddress>::const_iterator it = addrs.begin(); it != addrs.end(); ++it)
{
ibrcommon::vaddress addr = (*it);
addr.setService(_port);
join(iface, addr);
}
}
void IPNDAgent::join_interface(const ibrcommon::vinterface &iface) throw ()
{
ibrcommon::multicastsocket &msock = dynamic_cast<ibrcommon::multicastsocket&>(**_recv_socket.getAll().begin());
for (std::set<ibrcommon::vaddress>::const_iterator it_addr = _destinations.begin(); it_addr != _destinations.end(); ++it_addr)
{
try {
msock.join(*it_addr, iface);
} catch (const ibrcommon::socket_raw_error &e) {
if (e.error() != EADDRINUSE) {
IBRCOMMON_LOGGER_TAG(IPNDAgent::TAG, error) << "join failed on " << iface.toString() << "; " << e.what() << IBRCOMMON_LOGGER_ENDL;
}
} catch (const ibrcommon::socket_exception &e) {
IBRCOMMON_LOGGER_DEBUG_TAG(IPNDAgent::TAG, 10) << "can not join " << (*it_addr).toString() << " on " << iface.toString() << "; " << e.what() << IBRCOMMON_LOGGER_ENDL;
}
}
}
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;
}
}
void IPNDAgent::onAdvertiseBeacon(const ibrcommon::vinterface &iface, const DiscoveryBeacon &beacon) throw ()
{
// serialize announcement
stringstream ss; ss << beacon;
const std::string data = ss.str();
// get all sockets for the given interface
ibrcommon::socketset fds = _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)
{
try {
ibrcommon::udpsocket &sock = dynamic_cast<ibrcommon::udpsocket&>(**iter);
// send beacon to all addresses
for (std::set<ibrcommon::vaddress>::const_iterator addr_it = _destinations.begin(); addr_it != _destinations.end(); ++addr_it)
{
const ibrcommon::vaddress &addr = (*addr_it);
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;
}
}
} catch (const std::bad_cast&) {
IBRCOMMON_LOGGER_TAG(IPNDAgent::TAG, error) << "Socket for sending isn't a udpsocket." << IBRCOMMON_LOGGER_ENDL;
}
}
}
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::leave(const ibrcommon::vinterface &iface) throw ()
{
// subscribe to NetLink events on our interfaces
ibrcommon::LinkManager::getInstance().removeEventListener(iface, this);
// un-register as discovery handler for this interface
dtn::core::BundleCore::getInstance().getDiscoveryAgent().unregisterService(iface, this);
// get all sockets bound to any interface
ibrcommon::socketset anysocks = _socket.get(ibrcommon::vinterface(ibrcommon::vinterface::ANY));
for (ibrcommon::socketset::iterator it = anysocks.begin(); it != anysocks.end(); ++it)
{
ibrcommon::multicastsocket *msock = dynamic_cast<ibrcommon::multicastsocket*>(*it);
if (msock == NULL) continue;
for (std::set<ibrcommon::vaddress>::const_iterator addr_it = _destinations.begin(); addr_it != _destinations.end(); ++addr_it)
{
const ibrcommon::vaddress &addr = (*addr_it);
// leave only if family matches
if (addr.family() != msock->get_family()) continue;
try {
msock->leave(addr, iface);
} catch (const ibrcommon::socket_exception &e) {
IBRCOMMON_LOGGER_DEBUG_TAG(IPNDAgent::TAG, 10) << "Leave of " << addr.toString() << " failed on " << iface.toString() << "; " << e.what() << 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;
// 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) << "Socket down failed: " << ex.what() << IBRCOMMON_LOGGER_ENDL;
}
// delete the socket
delete msock;
}
}