/*
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.ArrayList;
import net.sourceforge.peers.Logger;
import net.sourceforge.peers.sip.RFC3261;
import net.sourceforge.peers.sip.Utils;
import net.sourceforge.peers.sip.syntaxencoding.NameAddress;
import net.sourceforge.peers.sip.syntaxencoding.SipHeaderFieldMultiValue;
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.syntaxencoding.SipURI;
import net.sourceforge.peers.sip.syntaxencoding.SipUriSyntaxException;
import net.sourceforge.peers.sip.transport.SipRequest;
public class Dialog {
public static final char ID_SEPARATOR = '|';
public static final int EMPTY_CSEQ = -1;
public final DialogState INIT;
public final DialogState EARLY;
public final DialogState CONFIRMED;
public final DialogState TERMINATED;
private DialogState state;
private String callId;
private String localTag;
private String remoteTag;
private int localCSeq;
private int remoteCSeq;
private String localUri;
private String remoteUri;
private String remoteTarget;
private boolean secure;
private ArrayList<String> routeSet;
private Logger logger;
Dialog(String callId, String localTag, String remoteTag, Logger logger) {
super();
this.callId = callId;
this.localTag = localTag;
this.remoteTag = remoteTag;
this.logger = logger;
INIT = new DialogStateInit(getId(), this, logger);
state = INIT;
EARLY = new DialogStateEarly(getId(), this, logger);
CONFIRMED = new DialogStateConfirmed(getId(), this, logger);
TERMINATED = new DialogStateTerminated(getId(), this, logger);
localCSeq = EMPTY_CSEQ;
remoteCSeq = EMPTY_CSEQ;
}
public void receivedOrSent1xx() {
state.receivedOrSent101To199();
}
public void receivedOrSent2xx() {
state.receivedOrSent2xx();
}
public void receivedOrSent300To699() {
state.receivedOrSent300To699();
}
public void receivedOrSentBye() {
state.receivedOrSentBye();
}
public void setState(DialogState state) {
this.state.log(state);
this.state = state;
}
public SipRequest buildSubsequentRequest(String method) {
//12.2.1.1
SipURI sipUri;
try {
sipUri = new SipURI(remoteTarget);
} catch (SipUriSyntaxException e) {
throw new RuntimeException(e);
//TODO check remote target when message is received
}
SipRequest subsequentRequest = new SipRequest(method, sipUri);
SipHeaders headers = subsequentRequest.getSipHeaders();
//To
SipHeaderFieldValue to = new SipHeaderFieldValue(
new NameAddress(remoteUri).toString());
if (remoteTag != null) {
to.addParam(new SipHeaderParamName(RFC3261.PARAM_TAG), remoteTag);
}
headers.add(new SipHeaderFieldName(RFC3261.HDR_TO), to);
//From
SipHeaderFieldValue from = new SipHeaderFieldValue(
new NameAddress(localUri).toString());
if (localTag != null) {
from.addParam(new SipHeaderParamName(RFC3261.PARAM_TAG), localTag);
}
headers.add(new SipHeaderFieldName(RFC3261.HDR_FROM), from);
//Call-ID
SipHeaderFieldValue callIdValue = new SipHeaderFieldValue(callId);
headers.add(new SipHeaderFieldName(RFC3261.HDR_CALLID), callIdValue);
//CSeq
if (localCSeq == Dialog.EMPTY_CSEQ) {
localCSeq = ((int)(System.currentTimeMillis() / 1000) & 0xFFFFFFFE) >> 1;
} else {
localCSeq++;
}
headers.add(new SipHeaderFieldName(RFC3261.HDR_CSEQ),
new SipHeaderFieldValue(localCSeq + " " + method));
//Route
if (!routeSet.isEmpty()) {
if (routeSet.get(0).contains(RFC3261.LOOSE_ROUTING)) {
ArrayList<SipHeaderFieldValue> routes = new ArrayList<SipHeaderFieldValue>();
for (String route : routeSet) {
routes.add(new SipHeaderFieldValue(route));
}
headers.add(new SipHeaderFieldName(RFC3261.HDR_ROUTE),
new SipHeaderFieldMultiValue(routes));
} else {
logger.error("Trying to forward to a strict router, forbidden in this implementation");
}
}
Utils.addCommonHeaders(headers);
return subsequentRequest;
}
public String getId() {
StringBuffer buf = new StringBuffer();
buf.append(callId).append(ID_SEPARATOR);
buf.append(localTag).append(ID_SEPARATOR);
buf.append(remoteTag);
return buf.toString();
}
public String getCallId() {
return callId;
}
public void setCallId(String callId) {
this.callId = callId;
}
public int getLocalCSeq() {
return localCSeq;
}
public void setLocalCSeq(int localCSeq) {
this.localCSeq = localCSeq;
}
public String getLocalUri() {
return localUri;
}
public void setLocalUri(String localUri) {
this.localUri = localUri;
}
public int getRemoteCSeq() {
return remoteCSeq;
}
public void setRemoteCSeq(int remoteCSeq) {
this.remoteCSeq = remoteCSeq;
}
public String getRemoteTarget() {
return remoteTarget;
}
public void setRemoteTarget(String remoteTarget) {
this.remoteTarget = remoteTarget;
}
public String getRemoteUri() {
return remoteUri;
}
public void setRemoteUri(String remoteUri) {
this.remoteUri = remoteUri;
}
public ArrayList<String> getRouteSet() {
return routeSet;
}
public void setRouteSet(ArrayList<String> routeSet) {
this.routeSet = routeSet;
}
public boolean isSecure() {
return secure;
}
public void setSecure(boolean secure) {
this.secure = secure;
}
public String getLocalTag() {
return localTag;
}
public void setLocalTag(String localTag) {
this.localTag = localTag;
}
public String getRemoteTag() {
return remoteTag;
}
public void setRemoteTag(String remoteTag) {
this.remoteTag = remoteTag;
}
public DialogState getState() {
return state;
}
}