/*
This file is part of Peers, a java SIP softphone.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Copyright 2007, 2008, 2009, 2010 Yohann Martineau
*/
package net.sourceforge.peers.sip.transactionuser;
import java.util.Collection;
import java.util.Hashtable;
import net.sourceforge.peers.Logger;
import net.sourceforge.peers.sip.RFC3261;
import net.sourceforge.peers.sip.syntaxencoding.SipHeaderFieldName;
import net.sourceforge.peers.sip.syntaxencoding.SipHeaderFieldValue;
import net.sourceforge.peers.sip.syntaxencoding.SipHeaderParamName;
import net.sourceforge.peers.sip.syntaxencoding.SipHeaders;
import net.sourceforge.peers.sip.transport.SipMessage;
import net.sourceforge.peers.sip.transport.SipResponse;
public class DialogManager {
private Hashtable<String, Dialog> dialogs;
private Logger logger;
public DialogManager(Logger logger) {
this.logger = logger;
dialogs = new Hashtable<String, Dialog>();
}
/**
* @param sipResponse sip response must contain a To tag, a
* From tag and a Call-ID
* @return the new Dialog created
*/
public synchronized Dialog createDialog(SipResponse sipResponse) {
SipHeaders sipHeaders = sipResponse.getSipHeaders();
String callID = sipHeaders.get(
new SipHeaderFieldName(RFC3261.HDR_CALLID)).toString();
SipHeaderFieldValue from = sipHeaders.get(
new SipHeaderFieldName(RFC3261.HDR_FROM));
SipHeaderFieldValue to = sipHeaders.get(
new SipHeaderFieldName(RFC3261.HDR_TO));
String fromTag = from.getParam(new SipHeaderParamName(RFC3261.PARAM_TAG));
String toTag = to.getParam(new SipHeaderParamName(RFC3261.PARAM_TAG));
Dialog dialog;
if (sipHeaders.get(new SipHeaderFieldName(RFC3261.HDR_VIA)) == null) {
//createDialog is called from UAS side, in layer Transaction User
dialog = new Dialog(callID, toTag, fromTag, logger);
} else {
//createDialog is called from UAC side, in syntax encoding layer
dialog = new Dialog(callID, fromTag, toTag, logger);
}
dialogs.put(dialog.getId(), dialog);
return dialog;
}
public void removeDialog(String dialogId) {
dialogs.remove(dialogId);
}
public synchronized Dialog getDialog(SipMessage sipMessage) {
SipHeaders sipHeaders = sipMessage.getSipHeaders();
String callID = sipHeaders.get(
new SipHeaderFieldName(RFC3261.HDR_CALLID)).toString();
SipHeaderFieldValue from = sipHeaders.get(
new SipHeaderFieldName(RFC3261.HDR_FROM));
SipHeaderFieldValue to = sipHeaders.get(
new SipHeaderFieldName(RFC3261.HDR_TO));
SipHeaderParamName tagName = new SipHeaderParamName(RFC3261.PARAM_TAG);
String fromTag = from.getParam(tagName);
String toTag = to.getParam(tagName);
Dialog dialog = dialogs.get(getDialogId(callID, fromTag, toTag));
if (dialog != null) {
return dialog;
}
return dialogs.get(getDialogId(callID, toTag, fromTag));
}
public synchronized Dialog getDialog(String callId) {
for (Dialog dialog : dialogs.values()) {
if (dialog.getCallId().equals(callId)) {
return dialog;
}
}
return null;
}
private String getDialogId(String callID, String localTag, String remoteTag) {
StringBuffer buf = new StringBuffer();
buf.append(callID);
buf.append(Dialog.ID_SEPARATOR);
buf.append(localTag);
buf.append(Dialog.ID_SEPARATOR);
buf.append(remoteTag);
return buf.toString();
}
public Collection<Dialog> getDialogCollection() {
return dialogs.values();
}
}