private void startSession() {
SipClientConnection scc = null;
try {
// <i><b>start a listener for incoming requests</b></i>
startListener();
// <i><b>open SIP connection with remote user</b></i>
scc = (SipClientConnection) Connector.open(address.getString());
scc.setListener(this);
// <i><b>initialize INVITE request</b></i>
scc.initRequest("INVITE", scn);
scc.setHeader("Content-Length", "" + sdp.length());
scc.setHeader("Content-Type", "application/sdp");
OutputStream os = scc.openContentOutputStream();
os.write(sdp.getBytes());
os.close(); // <i><b>close and send</b></i>
str = new StringItem("Inviting... ", scc.getHeader("To"));
form.append(str);
} catch (Exception ex) {
ex.printStackTrace();
// <i><b>handle IOException</b></i>
}
}
/** end session with BYE */
private void sendBYE() {
if (dialog != null) {
try {
SipClientConnection sc = dialog.getNewClientConnection("BYE");
sc.send();
str = new StringItem("user hang-up: ", "BYE sent...");
form.append(str);
boolean gotit = sc.receive(10000);
if (gotit) {
if (sc.getStatusCode() == 200) {
form.append("Session closed successfully...");
form.append("Dialog state: " + dialog.getState());
} else form.append("Error: " + sc.getReasonPhrase());
}
sc.close();
} catch (IOException iox) {
form.append("Exception: " + iox.getMessage());
}
} else {
form.append("No dialog information!");
}
}
/** Handle incoming response here */
public void notifyResponse(SipClientConnection scc) {
int statusCode = 0;
boolean received = false;
try {
scc.receive(0); // <i><b>fetch resent response</b></i>
statusCode = scc.getStatusCode();
str = new StringItem("Response: ", statusCode + " " + scc.getReasonPhrase());
form.append(str);
if (statusCode < 200) {
dialog = scc.getDialog();
form.append("Early-Dialog state: " + dialog.getState());
}
if (statusCode == 200) {
String contentType = scc.getHeader("Content-Type");
String contentLength = scc.getHeader("Content-Length");
int length = Integer.parseInt(contentLength);
if (contentType.equals("application/sdp")) {
//
// <i><b>handle SDP here</b></i>
//
}
dialog = scc.getDialog(); // <i><b>save dialog info</b></i>
form.append("Dialog state: " + dialog.getState());
scc.initAck(); // <i><b>initialize and send ACK</b></i>
scc.send();
str = new StringItem("Session established: ", scc.getHeader("Call-ID"));
form.append(str);
scc.close();
} else if (statusCode >= 300) {
str = new StringItem("Session failed: ", scc.getHeader("Call-ID"));
form.append(str);
form.removeCommand(byeCmd);
form.addCommand(restartCmd);
scc.close();
}
} catch (IOException ioe) {
// <i><b>handle e.g. transaction timeout here</b></i>
str = new StringItem("No answer: ", ioe.getMessage());
form.append(str);
form.removeCommand(byeCmd);
form.addCommand(restartCmd);
}
}