/**
* Send a message to a specified receiver address.
*
* @param msg message string to send.
* @param receiverAddress Address of the place to send it to.
* @param receiverPort the port to send it to.
* @param receiverProtocol protocol to use to send.
* @param retry try if connection was not successful at fi
* @throws IOException If there is trouble sending this message.
*/
protected void sendMessage(
byte[] msg, String receiverAddress, int receiverPort, String receiverProtocol, boolean retry)
throws IOException {
if (LogWriter.needsLogging)
LogWriter.logMessage(
"Sending message to ["
+ receiverAddress
+ ":"
+ receiverPort
+ "/"
+ receiverProtocol
+ "]\n"
+ new String(msg)
+ " to be sent to ");
// msg += "\r\n\r\n";
// Via is not included in the request so silently drop the reply.
if (receiverPort == -1) {
if (LogWriter.needsLogging)
LogWriter.logMessage(
"DEBUG, UDPMessageChannel, sendMessage(),"
+ " The message is not sent: the receiverPort=-1");
throw new IOException("Receiver port not set ");
}
if (Utils.compareToIgnoreCase(receiverProtocol, "UDP") == 0) {
try {
DatagramConnection socket;
Datagram reply;
boolean created = false;
if (stack.udpFlag) {
// Use the socket from the message processor (for firewall
// support use the same socket as the message processor
// socket -- feature request # 18 from java.net). This also
// makes the whole thing run faster!
socket = ((UDPMessageProcessor) messageProcessor).dc;
// ArnauVP: this has the problem that the datagram created from this (inbound) connection
// doesn't have an address assigned. Let's do it.
reply = socket.newDatagram(msg, msg.length);
reply.setAddress("datagram://" + peerAddress + ":" + peerPort);
} else {
// bind to any interface and port.
// format: datagram://address:port
socket = stack.getNetworkLayer().createDatagramSocket(peerAddress, peerPort);
reply = socket.newDatagram(msg, msg.length);
created = true;
}
if (LogWriter.needsLogging)
LogWriter.logMessage(
LogWriter.TRACE_DEBUG,
"UDPMessageChannel, sendMessage(),"
+ " Sending message over UDP, using socket "
+ socket
+ " created "
+ created
+ " destination "
+ reply.getAddress());
socket.send(reply);
if (created) socket.close();
} catch (IOException ex) {
throw ex;
} catch (Exception ex) {
InternalErrorHandler.handleException(ex);
}
} else {
// Use TCP to talk back to the sender.
SocketConnection outputSocket =
stack.ioHandler.sendBytes(peerAddress, peerPort, "tcp", msg, retry);
OutputStream myOutputStream = stack.ioHandler.getSocketOutputStream(outputSocket);
myOutputStream.write(msg, 0, msg.length);
myOutputStream.flush();
// The socket is cached (don't close it!);
}
}
/**
* Process an incoming datagram
*
* @param packet is the incoming datagram packet.
*/
private void processIncomingDataPacket(Datagram packet) throws Exception {
// For a request first via header tells where the message
// is coming from.
// For response, just get the port from the packet.
// format: address:port
String address = packet.getAddress();
try {
int firstColon = address.indexOf("//");
int secondColon = address.indexOf(":", firstColon + 1);
this.peerAddress = address.substring(firstColon + 2, secondColon);
if (LogWriter.needsLogging)
LogWriter.logMessage(
LogWriter.TRACE_DEBUG, "UDPMessageChannel, run(), sender address:" + peerAddress);
String senderPortString = address.substring(address.indexOf(";") + 1, address.indexOf("|"));
this.peerPacketSourcePort = Integer.parseInt(senderPortString);
if (LogWriter.needsLogging)
LogWriter.logMessage(
LogWriter.TRACE_DEBUG, "UDPMessageChannel, run(), sender port:" + peerPacketSourcePort);
} catch (NumberFormatException e) {
if (LogWriter.needsLogging)
LogWriter.logMessage(
LogWriter.TRACE_EXCEPTION,
"UDPMessageChannel, run(), exception raised: " + e.getMessage());
e.printStackTrace();
peerPacketSourcePort = -1;
}
int packetLength = packet.getLength();
// Read bytes and put it in a queue.
byte[] msgBytes = packet.getData();
// Do debug logging.
if (LogWriter.needsLogging) {
LogWriter.logMessage(
LogWriter.TRACE_DEBUG,
"UDPMessageChannel: processIncomingDataPacket : peerAddress = "
+ peerAddress
+ "/"
+ peerPacketSourcePort
+ " Length = "
+ packetLength
+ " msgBytes "
+ msgBytes);
}
Message sipMessage = null;
try {
receptionTime = System.currentTimeMillis();
sipMessage = myParser.parseSIPMessage(msgBytes);
myParser = null;
} catch (ParseException ex) {
myParser = null; // let go of the parser reference.
if (LogWriter.needsLogging) {
LogWriter.logMessage(LogWriter.TRACE_DEBUG, "Rejecting message ! " + new String(msgBytes));
LogWriter.logMessage(LogWriter.TRACE_DEBUG, "error message " + ex.getMessage());
LogWriter.logException(ex);
}
// TODO: do this on TCP too
// JvB: send a 400 response for requests (except ACK)
String msgString = new String(msgBytes, 0, packetLength);
if (!msgString.startsWith("SIP/") && !msgString.startsWith("ACK ")) {
String badReqRes = create400Response(msgString, ex);
if (badReqRes != null) {
if (LogWriter.needsLogging)
LogWriter.logMessage(
LogWriter.TRACE_DEBUG, "Sending automatic 400 Bad Request: " + badReqRes);
try {
this.sendMessage(badReqRes.getBytes(), peerAddress, peerPacketSourcePort, "UDP", false);
} catch (IOException e) {
LogWriter.logException(e);
}
} else {
if (LogWriter.needsLogging)
LogWriter.logMessage(
LogWriter.TRACE_DEBUG, "Could not formulate automatic 400 Bad Request");
}
}
return;
}
// No parse exception but null message - reject it and
// march on (or return).
// exit this message processor if the message did not parse.
if (sipMessage == null) {
if (LogWriter.needsLogging)
LogWriter.logMessage(LogWriter.TRACE_DEBUG, "Rejecting message ! + Null message parsed.");
return;
}
ViaList viaList = sipMessage.getViaHeaders();
// Check for the required headers.
if (sipMessage.getFromHeader() == null
||
// sipMessage.getFromHeader().getTag() == null ||
sipMessage.getTo() == null
|| sipMessage.getCallId() == null
|| sipMessage.getCSeqHeader() == null
|| sipMessage.getViaHeaders() == null) {
String badmsg = new String(msgBytes);
if (LogWriter.needsLogging) {
LogWriter.logMessage("bad message " + badmsg);
LogWriter.logMessage(
">>> Dropped Bad Msg "
+ "FromHeader = "
+ sipMessage.getFromHeader()
+ "ToHeader = "
+ sipMessage.getTo()
+ "CallId = "
+ sipMessage.getCallId()
+ "CSeqHeader = "
+ sipMessage.getCSeqHeader()
+ "Via = "
+ sipMessage.getViaHeaders());
}
stack.logBadMessage(badmsg);
return;
}
// For a request first via header tells where the message
// is coming from.
// For response, just get the port from the packet.
if (sipMessage instanceof Request) {
ViaHeader v = (ViaHeader) viaList.first();
if (v.hasPort()) this.peerPort = v.getPort();
else this.peerPort = SIPMessageStack.DEFAULT_PORT;
this.peerProtocol = v.getTransport();
boolean hasRPort = v.hasParameter(ViaHeader.RPORT);
// Be warned, the host comparison may fail if socket.getAddress()
// returns a domain name as the Via Host will be a numeric IP.
// FIXME: No idea. Doing a DNS lookup or reverse DNS lookup
// can be misleading because they can be non-matching, that is,
// DNS(peerAddressName) != ReverseDNS(peerAddressIP)
if (hasRPort || !this.peerAddress.equals(v.getHost())) {
if (LogWriter.needsLogging)
LogWriter.logMessage(
LogWriter.TRACE_MESSAGES,
"WARNING! \"Received\" parameter "
+ "has been temporarily disabled. Response will be sent to topmost Via Host: "
+ v.getHost());
this.peerAddress = v.getHost();
// if (LogWriter.needsLogging)
// LogWriter.logMessage(LogWriter.TRACE_MESSAGES, "Adding \"received\"
// parameter" +
// " to incoming request with value: " + peerAddress +
// " because it doesn't match the Via host " + v.getHost());
// v.setParameter(ViaHeader.RECEIVED, this.peerAddress);
}
if (hasRPort) {
v.setParameter(ViaHeader.RPORT, Integer.toString(peerPacketSourcePort));
this.peerPort = peerPacketSourcePort;
}
} else {
this.peerPort = this.peerPacketSourcePort;
this.peerProtocol = ((ViaHeader) viaList.getFirst()).getTransport();
}
processMessage(sipMessage);
}
