/**
* Inherited from TransactionServerListener. When the TransactionServer goes into the "Trying"
* state receiving a request
*
* <p>If called for a INVITE transaction, it initializes the dialog information, <br>
* moves to D_INVITED state, and add a listener to the SipProvider, <br>
* and fires <i>onInvite(caller,body,msg)</i>.
*/
public void onTransRequest(TransactionServer ts, Message req) {
printLog("inside onTransRequest(ts,msg)", LogLevel.LOW);
if (ts.getTransactionMethod().equals(SipMethods.INVITE)) {
if (!verifyStatus(statusIs(D_WAITING))) return;
changeStatus(D_INVITED);
invite_req = req;
update(Dialog.UAS, invite_req);
listener.onDlgInvite(
this,
invite_req.getToHeader().getNameAddress(),
invite_req.getFromHeader().getNameAddress(),
invite_req.getBody(),
invite_req);
}
}
/**
* Inherited from class SipProviderListener. Called when a new message is received (out of any
* ongoing transaction) for the current InviteDialog. Always checks for out-of-date methods (CSeq
* header sequence number).
*
* <p>If the message is ACK(2xx/INVITE) request, it moves to D_CALL state, and fires
* <i>onDlgAck(this,body,msg)</i>.
*
* <p>If the message is 2xx(INVITE) response, it create a new AckTransactionClient
*
* <p>If the message is BYE, it moves to D_BYED state, removes the listener from SipProvider,
* fires onDlgBye(this,msg) then it responds with 200 OK, moves to D_CLOSE state and fires
* onDlgClose(this)
*/
public void onReceivedMessage(SipProvider sip_provider, Message msg) {
printLog("inside onReceivedMessage(sip_provider,message)", LogLevel.MEDIUM);
if (msg.isRequest()
&& !(msg.isAck() || msg.isCancel())
&& msg.getCSeqHeader().getSequenceNumber() <= getRemoteCSeq()) {
printLog("Request message is too late (CSeq too small): Message discarded", LogLevel.HIGH);
return;
}
// invite received
if (msg.isRequest() && msg.isInvite()) {
verifyStatus(statusIs(D_INIT) || statusIs(D_CALL));
// NOTE: if the invite_ts.listen() is used, you should not arrive
// here with the D_INIT state..
// however state D_INIT has been included for robustness against
// further changes.
if (statusIs(D_INIT)) changeStatus(D_INVITED);
else changeStatus(D_ReINVITED);
invite_req = msg;
invite_ts = new InviteTransactionServer(sip_provider, invite_req, this);
// ((TransactionServer)transaction).listen();
update(Dialog.UAS, invite_req);
if (statusIs(D_INVITED))
listener.onDlgInvite(
this,
invite_req.getToHeader().getNameAddress(),
invite_req.getFromHeader().getNameAddress(),
invite_req.getBody(),
invite_req);
else listener.onDlgReInvite(this, invite_req.getBody(), invite_req);
} else
// ack (of 2xx of INVITE)
if (msg.isRequest() && msg.isAck()) {
if (!verifyStatus(statusIs(D_ACCEPTED) || statusIs(D_ReACCEPTED))) return;
changeStatus(D_CALL);
// terminates the AckTransactionServer
ack_ts.terminate();
listener.onDlgAck(this, msg.getBody(), msg);
listener.onDlgCall(this);
} else
// keep sending ACK (if already sent) for any "200 OK" received
if (msg.isResponse()) {
if (!verifyStatus(statusIs(D_CALL))) return;
int code = msg.getStatusLine().getCode();
verifyThat(code >= 200 && code < 300, "code 2xx was expected");
if (ack_req != null) {
AckTransactionClient ack_tc = new AckTransactionClient(sip_provider, ack_req, null);
ack_tc.request();
}
} else
// bye received
if (msg.isRequest() && msg.isBye()) {
if (!verifyStatus(statusIs(D_CALL) || statusIs(D_BYEING))) return;
changeStatus(D_BYED);
bye_ts = new TransactionServer(sip_provider, msg, this);
// automatically sends a 200 OK
Message resp = MessageFactory.createResponse(msg, 200, SipResponses.reasonOf(200), null);
respond(resp);
listener.onDlgBye(this, msg);
changeStatus(D_CLOSE);
listener.onDlgClose(this);
} else
// cancel received
if (msg.isRequest() && msg.isCancel()) {
if (!verifyStatus(statusIs(D_INVITED) || statusIs(D_ReINVITED))) return;
// create a CANCEL TransactionServer and send a 200 OK (CANCEL)
TransactionServer ts = new TransactionServer(sip_provider, msg, null);
// ts.listen();
ts.respondWith(MessageFactory.createResponse(msg, 200, SipResponses.reasonOf(200), null));
// automatically sends a 487 Cancelled
Message resp =
MessageFactory.createResponse(invite_req, 487, SipResponses.reasonOf(487), null);
respond(resp);
listener.onDlgCancel(this, msg);
} else
// any other request received
if (msg.isRequest()) {
TransactionServer ts = new TransactionServer(sip_provider, msg, null);
// ts.listen();
ts.respondWith(MessageFactory.createResponse(msg, 405, SipResponses.reasonOf(405), null));
}
}