Java编写SIP协议

1、编写Server代码

package com.genersoft.iot.vmp.sip;
import javax.sip.*;
import javax.sip.message.*;
import javax.sip.header.*;
import java.util.*;public class SimpleSipServer implements SipListener {private SipFactory sipFactory;private SipStack sipStack;private SipProvider sipProvider;private MessageFactory messageFactory;private  String ip = "127.0.0.1";public SimpleSipServer() {try {sipFactory = SipFactory.getInstance();sipFactory.setPathName("gov.nist");Properties properties = new Properties();properties.setProperty("javax.sip.STACK_NAME", "SimpleSipServer");properties.setProperty("javax.sip.IP_ADDRESS", ip);properties.setProperty("javax.sip.RETRANSMISSION_FILTER", "on");sipStack = sipFactory.createSipStack(properties);ListeningPoint listeningPoint = sipStack.createListeningPoint(ip, 5060, "udp");sipProvider = sipStack.createSipProvider(listeningPoint);sipProvider.addSipListener(this);messageFactory = sipFactory.createMessageFactory();} catch (Exception e) {e.printStackTrace();}}@Overridepublic void processRequest(RequestEvent requestEvent) {Request request = requestEvent.getRequest();System.out.println("Received Request: " + request.getMethod());if (request.getMethod().equals(Request.INVITE)) {try {Response response = messageFactory.createResponse(Response.OK, request);sipProvider.sendResponse(response);System.out.println("Sent 200 OK response to INVITE");} catch (Exception e) {e.printStackTrace();}}}@Overridepublic void processResponse(ResponseEvent responseEvent) {}@Overridepublic void processTimeout(TimeoutEvent timeoutEvent) {System.out.println("Transaction Timed Out");}@Overridepublic void processIOException(IOExceptionEvent exceptionEvent) {System.out.println("IO Exception");}@Overridepublic void processTransactionTerminated(TransactionTerminatedEvent transactionTerminatedEvent) {System.out.println("Transaction Terminated");}@Overridepublic void processDialogTerminated(DialogTerminatedEvent dialogTerminatedEvent) {System.out.println("Dialog Terminated");}public static void main(String[] args) {new SimpleSipServer();}
}

2、编写Client端代码

package com.genersoft.iot.vmp.sip;
import javax.sip.*;
import javax.sip.address.*;
import javax.sip.message.*;
import javax.sip.header.*;
import java.util.*;
public class SimpleSipClient implements SipListener {private SipFactory sipFactory;private SipStack sipStack;private SipProvider sipProvider;private AddressFactory addressFactory;private MessageFactory messageFactory;private HeaderFactory headerFactory;private  String ip = "127.0.0.1";public SimpleSipClient() {try {sipFactory = SipFactory.getInstance();sipFactory.setPathName("gov.nist");Properties properties = new Properties();properties.setProperty("javax.sip.STACK_NAME", "SimpleSipClient");properties.setProperty("javax.sip.OUTBOUND_PROXY", ip+":5060/udp");properties.setProperty("javax.sip.IP_ADDRESS", ip);sipStack = sipFactory.createSipStack(properties);ListeningPoint listeningPoint = sipStack.createListeningPoint(ip, 5070, "udp");sipProvider = sipStack.createSipProvider(listeningPoint);sipProvider.addSipListener(this);addressFactory = sipFactory.createAddressFactory();messageFactory = sipFactory.createMessageFactory();headerFactory = sipFactory.createHeaderFactory();} catch (Exception e) {e.printStackTrace();}}public void sendInvite() {try {SipURI fromUri = addressFactory.createSipURI("client", ip);Address fromAddress = addressFactory.createAddress(fromUri);fromAddress.setDisplayName("Client");SipURI toUri = addressFactory.createSipURI("server", ip);Address toAddress = addressFactory.createAddress(toUri);toAddress.setDisplayName("Server");SipURI requestUri = addressFactory.createSipURI("server", ip+":5060");FromHeader fromHeader = headerFactory.createFromHeader(fromAddress, "client123");ToHeader toHeader = headerFactory.createToHeader(toAddress, null);CSeqHeader cSeqHeader = headerFactory.createCSeqHeader(1L, Request.INVITE);CallIdHeader callIdHeader = sipProvider.getNewCallId();MaxForwardsHeader maxForwardsHeader = headerFactory.createMaxForwardsHeader(70);ViaHeader viaHeader = headerFactory.createViaHeader(ip, 5070, "udp", null);ContactHeader contactHeader = headerFactory.createContactHeader(fromAddress);ArrayList<ViaHeader> viaHeaders = new ArrayList<>();viaHeaders.add(viaHeader);Request request = messageFactory.createRequest(requestUri, Request.INVITE, callIdHeader, cSeqHeader, fromHeader, toHeader, viaHeaders, maxForwardsHeader);request.addHeader(contactHeader);ClientTransaction transaction = sipProvider.getNewClientTransaction(request);transaction.sendRequest();System.out.println("Sent INVITE request");} catch (Exception e) {e.printStackTrace();}}@Overridepublic void processRequest(RequestEvent requestEvent) {}@Overridepublic void processResponse(ResponseEvent responseEvent) {Response response = responseEvent.getResponse();System.out.println("Received Response: " + response.getStatusCode());}@Overridepublic void processTimeout(TimeoutEvent timeoutEvent) {System.out.println("Transaction Timed Out");}@Overridepublic void processIOException(IOExceptionEvent exceptionEvent) {System.out.println("IO Exception");}@Overridepublic void processTransactionTerminated(TransactionTerminatedEvent transactionTerminatedEvent) {System.out.println("Transaction Terminated");}@Overridepublic void processDialogTerminated(DialogTerminatedEvent dialogTerminatedEvent) {System.out.println("Dialog Terminated");}public static void main(String[] args) {SimpleSipClient client = new SimpleSipClient();client.sendInvite();}
}