/*
* Connect a UDP socket, disconnect it, then send and recv on it.
* It will fail on Linux if we don't silently bind(2) again at the
* end of DatagramSocket.disconnect().
*/
private static void testConnectedUDP(InetAddress addr) throws Exception {
try {
DatagramSocket s = new DatagramSocket(0, addr);
DatagramSocket ss = new DatagramSocket(0, addr);
System.out.print("\tconnect...");
s.connect(ss.getLocalAddress(), ss.getLocalPort());
System.out.print("disconnect...");
s.disconnect();
byte[] data = {0, 1, 2};
DatagramPacket p =
new DatagramPacket(data, data.length, s.getLocalAddress(), s.getLocalPort());
s.setSoTimeout(10000);
System.out.print("send...");
s.send(p);
System.out.print("recv...");
s.receive(p);
System.out.println("OK");
ss.close();
s.close();
} catch (Exception e) {
e.printStackTrace();
throw e;
}
}
static String printSocket(DatagramSocket socket) {
return "[Socket: localPort="
+ socket.getLocalPort()
+ ", remoteAddr="
+ socket.getInetAddress()
+ ", localAddr="
+ socket.getLocalAddress()
+ "]";
}
void closeSocket() {
if (sock != null) {
// by sending a dummy packet, the thread will terminate (if it was flagged as stopped before)
sendDummyPacket(sock.getLocalAddress(), sock.getLocalPort());
sock.close();
sock = null;
if (Trace.trace) {
Trace.info("UDP.closeSocket()", "socket closed");
}
}
}
/**
* The method queries a Stun server for a binding for the port and address that <tt>sock</tt> is
* bound on.
*
* @param sock the socket whose port and address we'dlike to resolve (the stun message gets sent
* trhough that socket)
* @return StunAddress the address returned by the stun server or null if an error occurred or no
* address was returned
* @throws IOException if an error occurs while stun4j is using sockets.
* @throws BindException if the port is already in use.
*/
private StunAddress queryStunServer(DatagramSocket sock) throws IOException, BindException {
StunAddress mappedAddress = null;
if (detector != null && useStun) {
mappedAddress = detector.getMappingFor(sock);
if (logger.isTraceEnabled()) {
logger.trace(
"For socket with address "
+ sock.getLocalAddress().getHostAddress()
+ " and port "
+ sock.getLocalPort()
+ " the stun server returned the "
+ "following mapping ["
+ mappedAddress
+ "]");
}
}
return mappedAddress;
}
String dumpSocketInfo() throws Exception {
StringBuffer sb = new StringBuffer();
sb.append("local_addr=").append(local_addr);
sb.append(", mcast_addr=").append(mcast_addr);
sb.append(", bind_addr=").append(bind_addr);
sb.append(", ttl=").append(ip_ttl);
if (sock != null) {
sb.append("\nsocket: bound to ");
sb.append(sock.getLocalAddress().getHostAddress()).append(":").append(sock.getLocalPort());
sb.append(", receive buffer size=").append(sock.getReceiveBufferSize());
sb.append(", send buffer size=").append(sock.getSendBufferSize());
}
if (mcast_sock != null) {
sb.append("\nmulticast socket: bound to ");
sb.append(mcast_sock.getInterface().getHostAddress())
.append(":")
.append(mcast_sock.getLocalPort());
sb.append(", send buffer size=").append(mcast_sock.getSendBufferSize());
sb.append(", receive buffer size=").append(mcast_sock.getReceiveBufferSize());
}
return sb.toString();
}
/**
* Create UDP sender and receiver sockets. Currently there are 2 sockets (sending and receiving).
* This is due to Linux's non-BSD compatibility in the JDK port (see DESIGN).
*/
void createSockets() throws Exception {
InetAddress tmp_addr = null;
// bind_addr not set, try to assign one by default. This is needed on Windows
// changed by bela Feb 12 2003: by default multicast sockets will be bound to all network
// interfaces
// CHANGED *BACK* by bela March 13 2003: binding to all interfaces did not result in a correct
// local_addr. As a matter of fact, comparison between e.g. 0.0.0.0:1234 (on hostA) and
// 0.0.0.0:1.2.3.4 (on hostB) would fail !
if (bind_addr == null) {
InetAddress[] interfaces =
InetAddress.getAllByName(InetAddress.getLocalHost().getHostAddress());
if (interfaces != null && interfaces.length > 0) bind_addr = interfaces[0];
}
if (bind_addr == null) bind_addr = InetAddress.getLocalHost();
if (bind_addr != null && Trace.trace) {
Trace.info(
"UDP.createSockets()",
"unicast sockets will use interface " + bind_addr.getHostAddress());
// 2. Create socket for receiving unicast UDP packets. The address and port
// of this socket will be our local address (local_addr)
// 27-6-2003 bgooren, find available port in range (start_port, start_port+port_range)
}
int rcv_port = bind_port, max_port = bind_port + port_range;
while (rcv_port <= max_port) {
try {
sock = new DatagramSocket(rcv_port, bind_addr);
break;
} catch (SocketException bind_ex) { // Cannot listen on this port
rcv_port++;
} catch (SecurityException sec_ex) { // Not allowed to list on this port
rcv_port++;
}
// Cannot listen at all, throw an Exception
if (rcv_port == max_port + 1) { // +1 due to the increment above
throw new Exception(
"UDP.createSockets(): cannot list on any port in range "
+ bind_port
+ "-"
+ (bind_port + port_range));
}
}
// ucast_recv_sock=new DatagramSocket(bind_port, bind_addr);
if (sock == null) {
throw new Exception("UDP.createSocket(): sock is null");
}
local_addr = new IpAddress(sock.getLocalAddress(), sock.getLocalPort());
if (additional_data != null) {
local_addr.setAdditionalData(additional_data);
// 3. Create socket for receiving IP multicast packets
}
if (ip_mcast) {
mcast_sock = new MulticastSocket(mcast_port);
mcast_sock.setTimeToLive(ip_ttl);
if (bind_addr != null) {
mcast_sock.setInterface(bind_addr);
}
tmp_addr = InetAddress.getByName(mcast_addr_name);
mcast_addr = new IpAddress(tmp_addr, mcast_port);
mcast_sock.joinGroup(tmp_addr);
}
setBufferSizes();
if (Trace.trace) {
Trace.info("UDP.createSockets()", "socket information:\n" + dumpSocketInfo());
}
}