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|
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.server.sip;
import gov.nist.javax.sip.clientauthutils.AccountManager;
import gov.nist.javax.sip.clientauthutils.UserCredentials;
import gov.nist.javax.sip.header.SIPHeaderNames;
import gov.nist.javax.sip.header.WWWAuthenticate;
import android.net.sip.ISipSession;
import android.net.sip.ISipSessionListener;
import android.net.sip.SessionDescription;
import android.net.sip.SipProfile;
import android.net.sip.SipSessionAdapter;
import android.net.sip.SipSessionState;
import android.text.TextUtils;
import android.util.Log;
import java.io.IOException;
import java.net.DatagramSocket;
import java.text.ParseException;
import java.util.Collection;
import java.util.EventObject;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import java.util.TooManyListenersException;
import javax.sip.ClientTransaction;
import javax.sip.Dialog;
import javax.sip.DialogTerminatedEvent;
import javax.sip.IOExceptionEvent;
import javax.sip.InvalidArgumentException;
import javax.sip.ListeningPoint;
import javax.sip.RequestEvent;
import javax.sip.ResponseEvent;
import javax.sip.ServerTransaction;
import javax.sip.SipException;
import javax.sip.SipFactory;
import javax.sip.SipListener;
import javax.sip.SipProvider;
import javax.sip.SipStack;
import javax.sip.TimeoutEvent;
import javax.sip.Transaction;
import javax.sip.TransactionState;
import javax.sip.TransactionTerminatedEvent;
import javax.sip.address.Address;
import javax.sip.address.SipURI;
import javax.sip.header.CSeqHeader;
import javax.sip.header.ExpiresHeader;
import javax.sip.header.FromHeader;
import javax.sip.header.MinExpiresHeader;
import javax.sip.header.ViaHeader;
import javax.sip.message.Message;
import javax.sip.message.Request;
import javax.sip.message.Response;
/**
* Manages {@link ISipSession}'s for a SIP account.
*/
class SipSessionGroup implements SipListener {
private static final String TAG = "SipSession";
private static final String ANONYMOUS = "anonymous";
private static final int EXPIRY_TIME = 3600;
private static final EventObject DEREGISTER = new EventObject("Deregister");
private static final EventObject END_CALL = new EventObject("End call");
private static final EventObject HOLD_CALL = new EventObject("Hold call");
private static final EventObject CONTINUE_CALL
= new EventObject("Continue call");
private final SipProfile mLocalProfile;
private final String mPassword;
private SipStack mSipStack;
private SipHelper mSipHelper;
private String mLastNonce;
private int mRPort;
// session that processes INVITE requests
private SipSessionImpl mCallReceiverSession;
private String mLocalIp;
// call-id-to-SipSession map
private Map<String, SipSessionImpl> mSessionMap =
new HashMap<String, SipSessionImpl>();
/**
* @param myself the local profile with password crossed out
* @param password the password of the profile
* @throws IOException if cannot assign requested address
*/
public SipSessionGroup(String localIp, SipProfile myself, String password)
throws SipException, IOException {
mLocalProfile = myself;
mPassword = password;
reset(localIp);
}
void reset(String localIp) throws SipException, IOException {
mLocalIp = localIp;
if (localIp == null) return;
SipProfile myself = mLocalProfile;
SipFactory sipFactory = SipFactory.getInstance();
Properties properties = new Properties();
properties.setProperty("javax.sip.STACK_NAME", getStackName());
String outboundProxy = myself.getProxyAddress();
if (!TextUtils.isEmpty(outboundProxy)) {
properties.setProperty("javax.sip.OUTBOUND_PROXY", outboundProxy
+ ":" + myself.getPort() + "/" + myself.getProtocol());
}
SipStack stack = mSipStack = sipFactory.createSipStack(properties);
try {
SipProvider provider = stack.createSipProvider(
stack.createListeningPoint(localIp, allocateLocalPort(),
myself.getProtocol()));
provider.addSipListener(this);
mSipHelper = new SipHelper(stack, provider);
} catch (InvalidArgumentException e) {
throw new IOException(e.getMessage());
} catch (TooManyListenersException e) {
// must never happen
throw new SipException("SipSessionGroup constructor", e);
}
Log.d(TAG, " start stack for " + myself.getUriString());
stack.start();
mLastNonce = null;
mCallReceiverSession = null;
mSessionMap.clear();
}
public SipProfile getLocalProfile() {
return mLocalProfile;
}
public String getLocalProfileUri() {
return mLocalProfile.getUriString();
}
private String getStackName() {
return "stack" + System.currentTimeMillis();
}
public synchronized void close() {
Log.d(TAG, " close stack for " + mLocalProfile.getUriString());
mSessionMap.clear();
closeToNotReceiveCalls();
if (mSipStack != null) {
mSipStack.stop();
mSipStack = null;
mSipHelper = null;
}
}
public synchronized boolean isClosed() {
return (mSipStack == null);
}
// For internal use, require listener not to block in callbacks.
public synchronized void openToReceiveCalls(ISipSessionListener listener) {
if (mCallReceiverSession == null) {
mCallReceiverSession = new SipSessionCallReceiverImpl(listener);
} else {
mCallReceiverSession.setListener(listener);
}
}
public synchronized void closeToNotReceiveCalls() {
mCallReceiverSession = null;
}
public ISipSession createSession(ISipSessionListener listener) {
return (isClosed() ? null : new SipSessionImpl(listener));
}
private static int allocateLocalPort() throws SipException {
try {
DatagramSocket s = new DatagramSocket();
int localPort = s.getLocalPort();
s.close();
return localPort;
} catch (IOException e) {
throw new SipException("allocateLocalPort()", e);
}
}
private synchronized SipSessionImpl getSipSession(EventObject event) {
String key = SipHelper.getCallId(event);
Log.d(TAG, " sesssion key from event: " + key);
Log.d(TAG, " active sessions:");
for (String k : mSessionMap.keySet()) {
Log.d(TAG, " ..... '" + k + "': " + mSessionMap.get(k));
}
SipSessionImpl session = mSessionMap.get(key);
return ((session != null) ? session : mCallReceiverSession);
}
private synchronized void addSipSession(SipSessionImpl newSession) {
removeSipSession(newSession);
String key = newSession.getCallId();
Log.d(TAG, " +++++ add a session with key: '" + key + "'");
mSessionMap.put(key, newSession);
for (String k : mSessionMap.keySet()) {
Log.d(TAG, " ..... " + k + ": " + mSessionMap.get(k));
}
}
private synchronized void removeSipSession(SipSessionImpl session) {
if (session == mCallReceiverSession) return;
String key = session.getCallId();
SipSessionImpl s = mSessionMap.remove(key);
// sanity check
if ((s != null) && (s != session)) {
Log.w(TAG, "session " + session + " is not associated with key '"
+ key + "'");
mSessionMap.put(key, s);
for (Map.Entry<String, SipSessionImpl> entry
: mSessionMap.entrySet()) {
if (entry.getValue() == s) {
key = entry.getKey();
mSessionMap.remove(key);
}
}
}
Log.d(TAG, " remove session " + session + " with key '" + key + "'");
for (String k : mSessionMap.keySet()) {
Log.d(TAG, " ..... " + k + ": " + mSessionMap.get(k));
}
}
public void processRequest(RequestEvent event) {
process(event);
}
public void processResponse(ResponseEvent event) {
process(event);
}
public void processIOException(IOExceptionEvent event) {
process(event);
}
public void processTimeout(TimeoutEvent event) {
process(event);
}
public void processTransactionTerminated(TransactionTerminatedEvent event) {
process(event);
}
public void processDialogTerminated(DialogTerminatedEvent event) {
process(event);
}
private synchronized void process(EventObject event) {
SipSessionImpl session = getSipSession(event);
try {
if ((session != null) && session.process(event)) {
Log.d(TAG, " ~~~~~ new state: " + session.mState);
} else {
Log.d(TAG, "event not processed: " + event);
}
} catch (Throwable e) {
Log.e(TAG, "event process error: " + event, e);
session.onError(e);
}
}
private class SipSessionCallReceiverImpl extends SipSessionImpl {
public SipSessionCallReceiverImpl(ISipSessionListener listener) {
super(listener);
}
public boolean process(EventObject evt) throws SipException {
Log.d(TAG, " ~~~~~ " + this + ": " + mState + ": processing "
+ log(evt));
if (isRequestEvent(Request.INVITE, evt)) {
RequestEvent event = (RequestEvent) evt;
SipSessionImpl newSession = new SipSessionImpl(mProxy);
newSession.mServerTransaction = mSipHelper.sendRinging(event,
generateTag());
newSession.mDialog = newSession.mServerTransaction.getDialog();
newSession.mInviteReceived = event;
newSession.mPeerProfile = createPeerProfile(event.getRequest());
newSession.mState = SipSessionState.INCOMING_CALL;
newSession.mPeerSessionDescription =
event.getRequest().getRawContent();
addSipSession(newSession);
mProxy.onRinging(newSession, newSession.mPeerProfile,
newSession.mPeerSessionDescription);
return true;
} else {
return false;
}
}
}
class SipSessionImpl extends ISipSession.Stub {
SipProfile mPeerProfile;
SipSessionListenerProxy mProxy = new SipSessionListenerProxy();
SipSessionState mState = SipSessionState.READY_TO_CALL;
RequestEvent mInviteReceived;
Dialog mDialog;
ServerTransaction mServerTransaction;
ClientTransaction mClientTransaction;
byte[] mPeerSessionDescription;
boolean mInCall;
boolean mReRegisterFlag = false;
public SipSessionImpl(ISipSessionListener listener) {
setListener(listener);
}
SipSessionImpl duplicate() {
return new SipSessionImpl(mProxy.getListener());
}
private void reset() {
mInCall = false;
removeSipSession(this);
mPeerProfile = null;
mState = SipSessionState.READY_TO_CALL;
mInviteReceived = null;
mDialog = null;
mServerTransaction = null;
mClientTransaction = null;
mPeerSessionDescription = null;
}
public boolean isInCall() {
return mInCall;
}
public String getLocalIp() {
return mLocalIp;
}
public SipProfile getLocalProfile() {
return mLocalProfile;
}
public SipProfile getPeerProfile() {
return mPeerProfile;
}
public String getCallId() {
return SipHelper.getCallId(getTransaction());
}
private Transaction getTransaction() {
if (mClientTransaction != null) return mClientTransaction;
if (mServerTransaction != null) return mServerTransaction;
return null;
}
public String getState() {
return mState.toString();
}
public void setListener(ISipSessionListener listener) {
mProxy.setListener((listener instanceof SipSessionListenerProxy)
? ((SipSessionListenerProxy) listener).getListener()
: listener);
}
public void makeCall(SipProfile peerProfile,
SessionDescription sessionDescription) {
try {
processCommand(
new MakeCallCommand(peerProfile, sessionDescription));
} catch (SipException e) {
onError(e);
}
}
public void answerCall(SessionDescription sessionDescription) {
try {
processCommand(
new MakeCallCommand(mPeerProfile, sessionDescription));
} catch (SipException e) {
onError(e);
}
}
public void endCall() {
try {
processCommand(END_CALL);
} catch (SipException e) {
onError(e);
}
}
public void changeCall(SessionDescription sessionDescription) {
try {
processCommand(
new MakeCallCommand(mPeerProfile, sessionDescription));
} catch (SipException e) {
onError(e);
}
}
public void register(int duration) {
try {
processCommand(new RegisterCommand(duration));
} catch (SipException e) {
onRegistrationFailed(e);
}
}
public void unregister() {
try {
processCommand(DEREGISTER);
} catch (SipException e) {
onRegistrationFailed(e);
}
}
public boolean isReRegisterRequired() {
return mReRegisterFlag;
}
public void clearReRegisterRequired() {
mReRegisterFlag = false;
}
public void sendKeepAlive() {
mState = SipSessionState.PINGING;
try {
processCommand(new OptionsCommand());
while (SipSessionState.PINGING.equals(mState)) {
Thread.sleep(1000);
}
} catch (SipException e) {
Log.e(TAG, "sendKeepAlive failed", e);
} catch (InterruptedException e) {
Log.e(TAG, "sendKeepAlive interrupted", e);
}
}
private void processCommand(EventObject command) throws SipException {
if (!process(command)) {
throw new SipException("wrong state to execute: " + command);
}
}
protected String generateTag() {
// 32-bit randomness
return String.valueOf((long) (Math.random() * 0x100000000L));
}
public String toString() {
try {
String s = super.toString();
return s.substring(s.indexOf("@")) + ":" + mState;
} catch (Throwable e) {
return super.toString();
}
}
public boolean process(EventObject evt) throws SipException {
Log.d(TAG, " ~~~~~ " + this + ": " + mState + ": processing "
+ log(evt));
synchronized (SipSessionGroup.this) {
if (isClosed()) return false;
Dialog dialog = null;
if (evt instanceof RequestEvent) {
dialog = ((RequestEvent) evt).getDialog();
} else if (evt instanceof ResponseEvent) {
dialog = ((ResponseEvent) evt).getDialog();
}
if (dialog != null) mDialog = dialog;
boolean processed;
switch (mState) {
case REGISTERING:
case DEREGISTERING:
processed = registeringToReady(evt);
break;
case PINGING:
processed = keepAliveProcess(evt);
break;
case READY_TO_CALL:
processed = readyForCall(evt);
break;
case INCOMING_CALL:
processed = incomingCall(evt);
break;
case INCOMING_CALL_ANSWERING:
processed = incomingCallToInCall(evt);
break;
case OUTGOING_CALL:
case OUTGOING_CALL_RING_BACK:
processed = outgoingCall(evt);
break;
case OUTGOING_CALL_CANCELING:
processed = outgoingCallToReady(evt);
break;
case IN_CALL:
processed = inCall(evt);
break;
default:
processed = false;
}
return (processed || processExceptions(evt));
}
}
private boolean processExceptions(EventObject evt) throws SipException {
if (isRequestEvent(Request.BYE, evt)) {
// terminate the call whenever a BYE is received
mSipHelper.sendResponse((RequestEvent) evt, Response.OK);
endCallNormally();
return true;
} else if (isRequestEvent(Request.CANCEL, evt)) {
mSipHelper.sendResponse((RequestEvent) evt,
Response.CALL_OR_TRANSACTION_DOES_NOT_EXIST);
return true;
} else if (evt instanceof TransactionTerminatedEvent) {
if (evt instanceof TimeoutEvent) {
processTimeout((TimeoutEvent) evt);
} else {
Log.d(TAG, "Transaction terminated:" + this);
if (!SipSessionState.IN_CALL.equals(mState)) {
removeSipSession(this);
}
return true;
}
return true;
} else if (evt instanceof DialogTerminatedEvent) {
processDialogTerminated((DialogTerminatedEvent) evt);
return true;
}
return false;
}
private void processDialogTerminated(DialogTerminatedEvent event) {
if (mDialog == event.getDialog()) {
onError(new SipException("dialog terminated"));
} else {
Log.d(TAG, "not the current dialog; current=" + mDialog
+ ", terminated=" + event.getDialog());
}
}
private void processTimeout(TimeoutEvent event) {
Log.d(TAG, "processing Timeout..." + event);
Transaction current = event.isServerTransaction()
? mServerTransaction
: mClientTransaction;
Transaction target = event.isServerTransaction()
? event.getServerTransaction()
: event.getClientTransaction();
if ((current != target) && (mState != SipSessionState.PINGING)) {
Log.d(TAG, "not the current transaction; current=" + current
+ ", timed out=" + target);
return;
}
switch (mState) {
case REGISTERING:
case DEREGISTERING:
reset();
mProxy.onRegistrationTimeout(this);
break;
case INCOMING_CALL:
case INCOMING_CALL_ANSWERING:
case OUTGOING_CALL_CANCELING:
endCallOnError(new SipException("timed out"));
break;
case PINGING:
reset();
mReRegisterFlag = true;
mState = SipSessionState.READY_TO_CALL;
break;
default:
// do nothing
break;
}
}
private int getExpiryTime(Response response) {
int expires = EXPIRY_TIME;
ExpiresHeader expiresHeader = (ExpiresHeader)
response.getHeader(ExpiresHeader.NAME);
if (expiresHeader != null) expires = expiresHeader.getExpires();
expiresHeader = (ExpiresHeader)
response.getHeader(MinExpiresHeader.NAME);
if (expiresHeader != null) {
expires = Math.max(expires, expiresHeader.getExpires());
}
return expires;
}
private boolean keepAliveProcess(EventObject evt) throws SipException {
if (evt instanceof OptionsCommand) {
mClientTransaction = mSipHelper.sendKeepAlive(mLocalProfile,
generateTag());
mDialog = mClientTransaction.getDialog();
addSipSession(this);
return true;
} else if (evt instanceof ResponseEvent) {
return parseOptionsResult(evt);
}
return false;
}
private boolean parseOptionsResult(EventObject evt) {
if (expectResponse(Request.OPTIONS, evt)) {
ResponseEvent event = (ResponseEvent) evt;
int rPort = getRPortFromResponse(event.getResponse());
if (rPort != -1) {
if (mRPort == 0) mRPort = rPort;
if (mRPort != rPort) {
mReRegisterFlag = true;
Log.w(TAG, String.format("rport is changed: %d <> %d",
mRPort, rPort));
mRPort = rPort;
} else {
Log.w(TAG, "rport is the same: " + rPort);
}
} else {
Log.w(TAG, "peer did not respect our rport request");
}
mState = SipSessionState.READY_TO_CALL;
return true;
}
return false;
}
private int getRPortFromResponse(Response response) {
ViaHeader viaHeader = (ViaHeader)(response.getHeader(
SIPHeaderNames.VIA));
return (viaHeader == null) ? -1 : viaHeader.getRPort();
}
private boolean registeringToReady(EventObject evt)
throws SipException {
if (expectResponse(Request.REGISTER, evt)) {
ResponseEvent event = (ResponseEvent) evt;
Response response = event.getResponse();
int statusCode = response.getStatusCode();
switch (statusCode) {
case Response.OK:
SipSessionState state = mState;
reset();
onRegistrationDone((state == SipSessionState.REGISTERING)
? getExpiryTime(((ResponseEvent) evt).getResponse())
: -1);
mLastNonce = null;
mRPort = 0;
return true;
case Response.UNAUTHORIZED:
case Response.PROXY_AUTHENTICATION_REQUIRED:
String nonce = getNonceFromResponse(response);
if (((nonce != null) && nonce.equals(mLastNonce)) ||
(nonce == mLastNonce)) {
Log.v(TAG, "Incorrect username/password");
reset();
onRegistrationFailed(createCallbackException(response));
} else {
mSipHelper.handleChallenge(event, getAccountManager());
mLastNonce = nonce;
}
return true;
default:
if (statusCode >= 500) {
reset();
onRegistrationFailed(createCallbackException(response));
return true;
}
}
}
return false;
}
private AccountManager getAccountManager() {
return new AccountManager() {
public UserCredentials getCredentials(ClientTransaction
challengedTransaction, String realm) {
return new UserCredentials() {
public String getUserName() {
return mLocalProfile.getUserName();
}
public String getPassword() {
return mPassword;
}
public String getSipDomain() {
return mLocalProfile.getSipDomain();
}
};
}
};
}
private String getNonceFromResponse(Response response) {
WWWAuthenticate authHeader = (WWWAuthenticate)(response.getHeader(
SIPHeaderNames.WWW_AUTHENTICATE));
return (authHeader == null) ? null : authHeader.getNonce();
}
private boolean readyForCall(EventObject evt) throws SipException {
// expect MakeCallCommand, RegisterCommand, DEREGISTER
if (evt instanceof MakeCallCommand) {
MakeCallCommand cmd = (MakeCallCommand) evt;
mPeerProfile = cmd.getPeerProfile();
SessionDescription sessionDescription =
cmd.getSessionDescription();
mClientTransaction = mSipHelper.sendInvite(mLocalProfile,
mPeerProfile, sessionDescription, generateTag());
mDialog = mClientTransaction.getDialog();
addSipSession(this);
mState = SipSessionState.OUTGOING_CALL;
mProxy.onCalling(this);
return true;
} else if (evt instanceof RegisterCommand) {
int duration = ((RegisterCommand) evt).getDuration();
mClientTransaction = mSipHelper.sendRegister(mLocalProfile,
generateTag(), duration);
mDialog = mClientTransaction.getDialog();
addSipSession(this);
mState = SipSessionState.REGISTERING;
mProxy.onRegistering(this);
return true;
} else if (DEREGISTER == evt) {
mClientTransaction = mSipHelper.sendRegister(mLocalProfile,
generateTag(), 0);
mDialog = mClientTransaction.getDialog();
addSipSession(this);
mState = SipSessionState.DEREGISTERING;
mProxy.onRegistering(this);
return true;
}
return false;
}
private boolean incomingCall(EventObject evt) throws SipException {
// expect MakeCallCommand(answering) , END_CALL cmd , Cancel
if (evt instanceof MakeCallCommand) {
// answer call
mServerTransaction = mSipHelper.sendInviteOk(mInviteReceived,
mLocalProfile,
((MakeCallCommand) evt).getSessionDescription(),
mServerTransaction);
mState = SipSessionState.INCOMING_CALL_ANSWERING;
return true;
} else if (END_CALL == evt) {
mSipHelper.sendInviteBusyHere(mInviteReceived,
mServerTransaction);
endCallNormally();
return true;
} else if (isRequestEvent(Request.CANCEL, evt)) {
RequestEvent event = (RequestEvent) evt;
mSipHelper.sendResponse(event, Response.OK);
mSipHelper.sendInviteRequestTerminated(
mInviteReceived.getRequest(), mServerTransaction);
endCallNormally();
return true;
}
return false;
}
private boolean incomingCallToInCall(EventObject evt)
throws SipException {
// expect ACK, CANCEL request
if (isRequestEvent(Request.ACK, evt)) {
establishCall();
return true;
} else if (isRequestEvent(Request.CANCEL, evt)) {
// http://tools.ietf.org/html/rfc3261#section-9.2
// Final response has been sent; do nothing here.
return true;
}
return false;
}
private boolean outgoingCall(EventObject evt) throws SipException {
if (expectResponse(Request.INVITE, evt)) {
ResponseEvent event = (ResponseEvent) evt;
Response response = event.getResponse();
int statusCode = response.getStatusCode();
switch (statusCode) {
case Response.RINGING:
if (mState == SipSessionState.OUTGOING_CALL) {
mState = SipSessionState.OUTGOING_CALL_RING_BACK;
mProxy.onRingingBack(this);
}
return true;
case Response.OK:
mSipHelper.sendInviteAck(event, mDialog);
mPeerSessionDescription = response.getRawContent();
establishCall();
return true;
case Response.PROXY_AUTHENTICATION_REQUIRED:
mClientTransaction = mSipHelper.handleChallenge(
(ResponseEvent) evt, getAccountManager());
mDialog = mClientTransaction.getDialog();
addSipSession(this);
return true;
case Response.BUSY_HERE:
reset();
mProxy.onCallBusy(this);
return true;
case Response.REQUEST_PENDING:
// TODO:
// rfc3261#section-14.1; re-schedule invite
return true;
default:
if (statusCode >= 400) {
// error: an ack is sent automatically by the stack
onError(createCallbackException(response));
return true;
} else if (statusCode >= 300) {
// TODO: handle 3xx (redirect)
} else {
return true;
}
}
return false;
} else if (END_CALL == evt) {
// RFC says that UA should not send out cancel when no
// response comes back yet. We are cheating for not checking
// response.
mSipHelper.sendCancel(mClientTransaction);
mState = SipSessionState.OUTGOING_CALL_CANCELING;
return true;
}
return false;
}
private boolean outgoingCallToReady(EventObject evt)
throws SipException {
if (evt instanceof ResponseEvent) {
ResponseEvent event = (ResponseEvent) evt;
Response response = event.getResponse();
int statusCode = response.getStatusCode();
if (expectResponse(Request.CANCEL, evt)) {
if (statusCode == Response.OK) {
// do nothing; wait for REQUEST_TERMINATED
return true;
}
} else if (expectResponse(Request.INVITE, evt)) {
if (statusCode == Response.OK) {
outgoingCall(evt); // abort Cancel
return true;
}
} else {
return false;
}
if (statusCode >= 400) {
onError(createCallbackException(response));
return true;
}
} else if (evt instanceof TransactionTerminatedEvent) {
// rfc3261#section-14.1:
// if re-invite gets timed out, terminate the dialog; but
// re-invite is not reliable, just let it go and pretend
// nothing happened.
onError(new SipException("timed out"));
}
return false;
}
private boolean inCall(EventObject evt) throws SipException {
// expect END_CALL cmd, BYE request, hold call (MakeCallCommand)
// OK retransmission is handled in SipStack
if (END_CALL == evt) {
// rfc3261#section-15.1.1
mSipHelper.sendBye(mDialog);
endCallNormally();
return true;
} else if (isRequestEvent(Request.INVITE, evt)) {
// got Re-INVITE
RequestEvent event = mInviteReceived = (RequestEvent) evt;
mState = SipSessionState.INCOMING_CALL;
mPeerSessionDescription = event.getRequest().getRawContent();
mServerTransaction = null;
mProxy.onRinging(this, mPeerProfile, mPeerSessionDescription);
return true;
} else if (isRequestEvent(Request.BYE, evt)) {
mSipHelper.sendResponse((RequestEvent) evt, Response.OK);
endCallNormally();
return true;
} else if (evt instanceof MakeCallCommand) {
// to change call
mClientTransaction = mSipHelper.sendReinvite(mDialog,
((MakeCallCommand) evt).getSessionDescription());
mState = SipSessionState.OUTGOING_CALL;
return true;
}
return false;
}
private Exception createCallbackException(Response response) {
return new SipException(String.format("Response: %s (%d)",
response.getReasonPhrase(), response.getStatusCode()));
}
private void establishCall() {
mState = SipSessionState.IN_CALL;
mInCall = true;
mProxy.onCallEstablished(this, mPeerSessionDescription);
}
private void fallbackToPreviousInCall(Throwable exception) {
mState = SipSessionState.IN_CALL;
mProxy.onCallChangeFailed(this, exception.getClass().getName(),
exception.getMessage());
}
private void endCallNormally() {
reset();
mProxy.onCallEnded(this);
}
private void endCallOnError(Throwable exception) {
reset();
mProxy.onError(this, exception.getClass().getName(),
exception.getMessage());
}
private void onError(Throwable exception) {
if (mInCall) {
fallbackToPreviousInCall(exception);
} else {
endCallOnError(exception);
}
}
private void onRegistrationDone(int duration) {
mProxy.onRegistrationDone(this, duration);
}
private void onRegistrationFailed(Throwable exception) {
mProxy.onRegistrationFailed(this, exception.getClass().getName(),
exception.getMessage());
}
}
/**
* @return true if the event is a request event matching the specified
* method; false otherwise
*/
private static boolean isRequestEvent(String method, EventObject event) {
try {
if (event instanceof RequestEvent) {
RequestEvent requestEvent = (RequestEvent) event;
return method.equals(requestEvent.getRequest().getMethod());
}
} catch (Throwable e) {
}
return false;
}
private static String getCseqMethod(Message message) {
return ((CSeqHeader) message.getHeader(CSeqHeader.NAME)).getMethod();
}
/**
* @return true if the event is a response event and the CSeqHeader method
* match the given arguments; false otherwise
*/
private static boolean expectResponse(
String expectedMethod, EventObject evt) {
if (evt instanceof ResponseEvent) {
ResponseEvent event = (ResponseEvent) evt;
Response response = event.getResponse();
return expectedMethod.equalsIgnoreCase(getCseqMethod(response));
}
return false;
}
/**
* @return true if the event is a response event and the response code and
* CSeqHeader method match the given arguments; false otherwise
*/
private static boolean expectResponse(
int responseCode, String expectedMethod, EventObject evt) {
if (evt instanceof ResponseEvent) {
ResponseEvent event = (ResponseEvent) evt;
Response response = event.getResponse();
if (response.getStatusCode() == responseCode) {
return expectedMethod.equalsIgnoreCase(getCseqMethod(response));
}
}
return false;
}
private static SipProfile createPeerProfile(Request request)
throws SipException {
try {
FromHeader fromHeader =
(FromHeader) request.getHeader(FromHeader.NAME);
Address address = fromHeader.getAddress();
SipURI uri = (SipURI) address.getURI();
String username = uri.getUser();
if (username == null) username = ANONYMOUS;
return new SipProfile.Builder(username, uri.getHost())
.setPort(uri.getPort())
.setDisplayName(address.getDisplayName())
.build();
} catch (InvalidArgumentException e) {
throw new SipException("createPeerProfile()", e);
} catch (ParseException e) {
throw new SipException("createPeerProfile()", e);
}
}
private static String log(EventObject evt) {
if (evt instanceof RequestEvent) {
return ((RequestEvent) evt).getRequest().toString();
} else if (evt instanceof ResponseEvent) {
return ((ResponseEvent) evt).getResponse().toString();
} else {
return evt.toString();
}
}
private class OptionsCommand extends EventObject {
public OptionsCommand() {
super(SipSessionGroup.this);
}
}
private class RegisterCommand extends EventObject {
private int mDuration;
public RegisterCommand(int duration) {
super(SipSessionGroup.this);
mDuration = duration;
}
public int getDuration() {
return mDuration;
}
}
private class MakeCallCommand extends EventObject {
private SessionDescription mSessionDescription;
public MakeCallCommand(SipProfile peerProfile,
SessionDescription sessionDescription) {
super(peerProfile);
mSessionDescription = sessionDescription;
}
public SipProfile getPeerProfile() {
return (SipProfile) getSource();
}
public SessionDescription getSessionDescription() {
return mSessionDescription;
}
}
}
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