/// <summary>
/// Triggered on receipt of any responses. Updates state of transaction.
/// </summary>
/// <param name="response">The SIP response message.</param>
public override void ReceivedResponse(Message response)
{
if (response.Is1XX())
{
if (State == "trying")
{
State = "proceeding";
App.ReceivedResponse(this, response);
}
else if (State == "proceeding")
{
App.ReceivedResponse(this, response);
}
}
else if (response.IsFinal())
{
if (State == "trying" || State == "proceeding")
{
State = "completed";
App.ReceivedResponse(this, response);
if (!Transport.Reliable)
{
StartTimer("K", Timer.K());
}
else
{
Timeout("K", 0);
}
}
}
}
/// <summary>
/// Triggered on receipt of any requests. Updates state of transaction
/// </summary>
/// <param name="receivedRequest">The received request.</param>
public override void ReceivedRequest(Message receivedRequest)
{
if (Request.Method == receivedRequest.Method)
{
if (State == "proceeding" || State == "completed")
{
if (LastResponse != null)
{
Stack.Send(LastResponse, Remote, Transport);
}
}
}
else if (receivedRequest.Method == "ACK")
{
if (State == "completed")
{
State = "confirmed";
if (!Transport.Reliable)
{
StartTimer("I", Timer.I());
}
else
{
Timeout("I", 0);
}
}
else if (State == "confirmed")
{
//Ignore duplicate ACK
}
}
}
public void ProcessMessage(Message request)
{
if (request.First("Content-Type").ToString().ToUpper().Contains("TEXT/PLAIN"))
{
try
{
if (MessageRecievedEvent != null)
{
MessageRecievedEvent(this, new MessageReceivedArgs(request.First("From").Value.ToString(), request.Body));
}
}
catch (Exception exception)
{
MessageBox.Show("Error in handling IM Message : " + exception.Message);
}
}
else if (request.First("Content-Type").ToString().ToUpper().Equals("APPLICATION/IM-ISCOMPOSING+XML"))
{
try
{
if (TypingMessageRecievedEvent != null)
{
TypingMessageRecievedEvent(this, new TypingMessageRecievedArgs(request.First("From").Value.ToString(), request.Body));
}
}
catch (Exception exception)
{
MessageBox.Show("Error in handling IM Message : " + exception.Message);
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="T:SIPLib.SIP.ProxyBranch"/> class.
/// </summary>
public ProxyBranch()
{
Request = null;
Response = null;
RemoteCandidates = null;
Transaction = null;
CancelRequest = null;
}
public void ProcessRequest(Message request)
{
if (request.Method.ToUpper().Contains("NOTIFY"))
{
if (request.Headers.ContainsKey("Content-Length"))
{
if (request.Body.Length > 0)
{
try
{
XDocument xDoc = XDocument.Parse(request.Body.Trim());
string basic = "";
string note = "";
foreach (XElement xElement in xDoc.Descendants())
{
switch (xElement.Name.ToString())
{
case "{urn:ietf:params:xml:ns:pidf}basic":
basic = xElement.Value;
break;
case "{urn:ietf:params:xml:ns:pidf}note":
note = xElement.Value;
break;
}
}
if (PresenceChangedEvent != null)
{
string contact = request.First("From").Value.ToString();
contact = contact.Replace("<","");
contact = contact.Replace(">","");
PresenceChangedEvent(this, new PresenceChangedArgs(contact, basic, note));
}
}
catch (Exception exception)
{
MessageBox.Show("Error in handling presence xml: " + exception.Message);
}
}
}
}
}
internal void AcceptCall(SDP sdp, Message IncomingCall)
{
foreach (UserAgent userAgent in Useragents.ToArray())
{
if (userAgent.CallID == IncomingCall.First("Call-ID").Value.ToString())
{
Message response = userAgent.CreateResponse(200, "OK");
response.InsertHeader(new Header("application/sdp", "Content-Type"));
response.Body = sdp.ToString();
userAgent.SendResponse(response);
}
}
}
public override void ReceivedResponse(UserAgent ua, Message response, SIPStack stack)
{
Log.Info("Received response with code " + response.ResponseCode + " " + response.ResponseText);
Log.Debug("\n\n" + response.ToString());
if (ResponseRecvEvent != null)
{
ResponseRecvEvent(this, new SipMessageEventArgs(response));
}
}
public override UserAgent CreateServer(Message request, SIPURI uri, SIPStack stack)
{
if (request.Method == "INVITE")
{
return new UserAgent(Stack, request);
}
return null;
}
/// <summary>
/// Sends the SIP request.
/// </summary>
/// <param name="request">The request.</param>
public override void SendRequest(Message request)
{
SIPURI target = null;
if (request.First("Route") == null)
{
target = request.Uri;
}
else
{
var routes = request.Headers["Route"];
if (routes.Count > 0)
{
try
{
target = ((Address)routes[0].Value).Uri;
string test = target.Parameters["lr"];
}
catch (Exception)
{
routes.RemoveAt(0);
if (routes.Count > 0)
{
routes.Add(new Header(request.Uri.ToString(), "Route"));
}
request.Headers["Route"] = routes;
request.Uri = target;
}
}
}
Stack.Sending(this, request);
ProxyBranch branch = new ProxyBranch();
SIPURI dest = target.Dup();
if (target.Port <= 0)
{
dest.Port = 5060;
}
else
{
dest.Port = target.Port;
}
if (!Helpers.IsIPv4(dest.Host))
{
try
{
IPAddress[] addresses = Dns.GetHostAddresses(dest.Host);
dest.Host = addresses[0].ToString();
}
catch (Exception)
{
}
}
if (Helpers.IsIPv4(dest.Host))
{
branch.RemoteCandidates = new List<SIPURI> { dest };
}
if (branch.RemoteCandidates == null || branch.RemoteCandidates.Count == 0)
{
Error(null, "Cannot resolve DNS target");
return;
}
target = branch.RemoteCandidates.First();
branch.RemoteCandidates.RemoveAt(0);
if (!request.Method.ToUpper().Contains("ACK"))
{
branch.Transaction = Transaction.CreateClient(Stack, this, request, Stack.Transport, target.HostPort());
branch.Request = request;
_branches.Add(branch);
}
else
{
Stack.Send(request, target.HostPort());
}
}
public override void ReceivedRequest(Transaction transaction, Message request)
{
//try
//{
if ((transaction != null) && Transaction != null && Transaction != transaction &&
request.Method.ToUpper() != "CANCEL")
{
Debug.Assert(false, "Invalid transaction for received request");
}
Server = true;
if (!request.Uri.Scheme.ToLower().Equals("sip"))
{
SendResponse(416, "Unsupported URI scheme");
return;
}
if (request.First("Max-Forwards") != null &&
int.Parse(request.First("Max-Forwards").Value.ToString()) < 0)
{
SendResponse(483, "Too many hops");
return;
}
if (!request.Headers["To"][0].Attributes.ContainsKey("tag") && transaction != null)
{
if (Stack.FindOtherTransactions(request, transaction) != null)
{
//SendResponse(482, "Loop detected - found another transaction");
return;
}
}
if (request.First("Proxy-Require") != null)
{
if (!request.Method.ToUpper().Contains("CANCEL") && !request.Method.ToUpper().Contains("ACK"))
{
Message response = CreateResponse(420, "Bad extension");
Header unsupported = request.First("Proxy-Require");
unsupported.Name = "Unsupported";
response.InsertHeader(unsupported);
SendResponse(unsupported);
return;
}
}
if (transaction != null)
{
Transaction = transaction;
}
if (request.Method.ToUpper() == "CANCEL")
{
string branch;
if (request.First("Via") != null && request.First("Via").Attributes.ContainsKey("branch"))
{
branch = request.First("Via").Attributes["branch"];
}
else
{
branch = Transaction.CreateBranch(request, true);
}
Transaction original = Stack.FindTransaction(Transaction.CreateId(branch, "INVITE"));
if (original != null)
{
if (original.State == "proceeding" || original.State == "trying")
{
original.SendResponse(original.CreateResponse(487, "Request terminated"));
}
transaction = Transaction.CreateServer(Stack, this, request, Stack.Transport,
Stack.Tag, false);
transaction.SendResponse(transaction.CreateResponse(200, "OK"));
}
SendCancel();
return;
}
if (string.IsNullOrEmpty(request.Uri.User) && IsLocal(request.Uri) && request.Uri.Parameters != null &&
request.First("Route") != null)
{
Header lastRoute = request.Headers["Route"].Last();
request.Headers["Route"].RemoveAt(request.Headers["Route"].Count - 1);
request.Uri = ((Address)(lastRoute.Value)).Uri;
}
if (request.First("Route") != null && IsLocal(((Address)(request.First("Route").Value)).Uri))
{
request.Headers["Route"].RemoveAt(0);
request.had_lr = true;
}
Stack.ReceivedRequest(this, request);
//}
//catch (Exception)
//{
// throw;
//}
}
public override UserAgent CreateServer(Message request, SIPURI uri, SIPStack stack)
{
if (request.Method != "CANCEL")
{
return new Proxy(Stack, request, true);
}
else return null;
}
/// <summary> /// Stub to create a SIP server user agent. /// </summary> /// <param name="request">The request.</param> /// <param name="uri">The URI.</param> /// <param name="sipStack">The sip stack.</param> /// <returns>UserAgent.</returns> public abstract UserAgent CreateServer(Message request, SIPURI uri, SIPStack sipStack);
/// <summary> /// Stub to alert on cancellation. /// </summary> /// <param name="ua">The ua.</param> /// <param name="request">The request.</param> /// <param name="sipStack">The sip stack.</param> public abstract void Cancelled(UserAgent ua, Message request, SIPStack sipStack);
/// <summary> /// Stub to alert on sending of a SIP message. /// </summary> /// <param name="ua">The ua.</param> /// <param name="message">The message.</param> /// <param name="sipStack">The sip stack.</param> public abstract void Sending(UserAgent ua, Message message, SIPStack sipStack);
/// <summary> /// Stub to receive a response. /// </summary> /// <param name="ua">The ua.</param> /// <param name="response">The response.</param> /// <param name="sipStack">The sip stack.</param> public abstract void ReceivedResponse(UserAgent ua, Message response, SIPStack sipStack);
/// <summary>
/// Handle received request
/// </summary>
/// <param name="m">The received message.</param>
/// <param name="uri">The SIPURI that sent the message.</param>
private void ReceivedRequest(Message m, SIPURI uri)
{
string branch = m.Headers["Via"][0].Attributes["branch"];
Transaction t;
if (m.Method == "ACK")
{
if (branch == "0")
{
t = null;
}
else
{
t = FindTransaction(branch);
if (t == null || (t.LastResponse != null && t.LastResponse.Is2XX()))
{
t = FindTransaction(Transaction.CreateId(branch, m.Method));
}
}
}
else
{
t = FindTransaction(Transaction.CreateId(branch, m.Method));
}
if (t == null)
{
UserAgent app = null; // Huh ?
if ((m.Method != "CANCEL") && (m.Headers["To"][0].Attributes.ContainsKey("tag")))
{
//In dialog request
Dialog d = FindDialog(m);
if (d == null)
{
if (m.Method != "ACK")
{
//Updated from latest code TODO
UserAgent u = CreateServer(m, uri);
if (u != null)
{
app = u;
}
else
{
// TODO: FIX NOTIFY ON SUBSCRIBE HANDLING
if (m.Method != "NOTIFY")
{
Send(Message.CreateResponse(481, "Dialog does not exist", null, null, m));
return;
}
else
{
string branchID = m.Headers["Via"][0].Attributes["branch"];
if (_seenNotifys.ContainsKey(branchID) && _seenNotifys[branchID] > 1)
{
Send(Message.CreateResponse(481, "Dialog does not exist", null, null, m));
return;
}
else
{
if (_seenNotifys.ContainsKey(branchID))
{
_seenNotifys[branchID] = _seenNotifys[branchID] + 1;
}
else
{
_seenNotifys[branchID] = 1;
}
}
}
return;
}
}
else
{
_log.Info("No dialog for ACK, finding transaction");
if (t == null && branch != "0")
{
t = FindTransaction(Transaction.CreateId(branch, "INVITE"));
}
if (t != null && t.State != "terminated")
{
t.ReceivedRequest(m);
return;
}
else
{
_log.Info("No existing transaction for ACK \n");
UserAgent u = CreateServer(m, uri);
if (u != null)
{
app = u;
}
else return;
}
}
}
else
{
app = d;
}
}
else if (m.Method != "CANCEL")
{
//Out of dialog request
UserAgent u = CreateServer(m, uri);
if (u != null)
{
//TODO error.....
app = u;
}
else if (m.Method == "OPTIONS")
{
//Handle OPTIONS
Message reply = Message.CreateResponse(200, "OK", null, null, m);
reply.InsertHeader(new Header("INVITE,ACK,CANCEL,BYE,OPTION,MESSAGE,PUBLISH", "Allow"));
Send(m);
return;
}
else if (m.Method == "MESSAGE")
{
//Handle MESSAGE
UserAgent ua = new UserAgent(this) {Request = m};
/*Message reply = ua.CreateResponse(200, "OK");
Send(reply);*/
App.ReceivedRequest(ua, m, this);
return;
}
else if (m.Method == "PUBLISH")
{
UserAgent ua = new UserAgent(this) {Request = m};
App.ReceivedRequest(ua, m, this);
return;
}
else if (m.Method != "ACK")
{
Send(Message.CreateResponse(405, "Method not allowed", null, null, m));
return;
}
}
else
{
//Cancel Request
Transaction o =
FindTransaction(Transaction.CreateId(m.Headers["Via"][0].Attributes["branch"], "INVITE"));
if (o == null)
{
Send(Message.CreateResponse(481, "Original transaction does not exist", null, null, m));
return;
}
app = o.App;
}
if (app != null)
{
//t = Transaction.CreateServer(app.Stack, app, app.Request, app.Stack.Transport, app.Stack.Tag);
// TODO: Check app or this ?
t = Transaction.CreateServer(this, app, m, Transport, Tag);
}
else if (m.Method != "ACK")
{
Send(Message.CreateResponse(404, "Not found", null, null, m));
}
}
else
{
t.ReceivedRequest(m);
}
}
/// <summary>
/// Handles the received response and passes it to the appropriate transaction or dialog for further handling.
/// </summary>
/// <param name="r">The received response.</param>
/// <param name="uri">The SIP URI.</param>
private void ReceivedResponse(Message r, SIPURI uri)
{
if (r.Headers.ContainsKey("Service-Route") && r.Is2XX() && r.First("CSeq").Method.Contains("REGISTER"))
{
ServiceRoute = r.Headers["Service-Route"];
foreach (Header h in ServiceRoute)
{
h.Name = "Route";
}
}
else if (r.Headers.ContainsKey("Record-Route") && r.Is2XX())
{
// TODO: FIX This ? don't need to keep building record-route ?
//InviteRecordRoute = r.Headers["Record-Route"];
//foreach (Header h in InviteRecordRoute)
//{
// h.Name = "Route";
//}
}
if (!r.Headers.ContainsKey("Via"))
{
Debug.Assert(false, String.Format("No Via header in received response \n{0}\n", r));
return;
}
string branch = r.Headers["Via"][0].Attributes["branch"];
string method = r.Headers["CSeq"][0].Method;
Transaction t = FindTransaction(Transaction.CreateId(branch, method));
if (t == null)
{
if ((method == "INVITE") && (r.Is2XX()))
{
_log.Debug("Looking for dialog with ID " + Dialog.ExtractID(r));
foreach (KeyValuePair<string, Dialog> keyValuePair in Dialogs)
{
_log.Debug("Current Dialogs " + keyValuePair.Key);
}
Dialog d = FindDialog(r);
if (d == null)
{
Debug.Assert(false, String.Format("No transaction or dialog for 2xx of INVITE \n{0}\n", r));
return;
}
else
{
d.ReceivedResponse(null, r);
}
}
else
{
Console.WriteLine("No Transaction for response...ignoring....");
//Debug.Assert(false, String.Format("No Transaction for response \n{0}\n", r.ToString()));
return;
}
}
else
{
t.ReceivedResponse(r);
return;
}
}
/// <summary>
/// Passes the notification of a cancellation to the associated SIP application.
/// </summary>
/// <param name="ua">The ua.</param>
/// <param name="request">The request.</param>
public void Cancelled(UserAgent ua, Message request)
{
App.Cancelled(ua, request, this);
}
/// <summary>
/// Simply passed the request on to the receivedRequest function when acting as a proxy.
/// </summary>
/// <param name="request">The request.</param>
/// <returns>Transaction.</returns>
public Transaction CreateTransaction(Message request)
{
ReceivedRequest(null, request);
return null;
}
/// <summary>
/// Creates the SIP server.
/// </summary>
/// <param name="request">The request.</param>
/// <param name="uri">The URI.</param>
/// <returns>UserAgent.</returns>
public UserAgent CreateServer(Message request, SIPURI uri)
{
return App.CreateServer(request, uri, this);
}
/// <summary>
/// Receives the SIP response
/// </summary>
/// <param name="transaction">The transaction.</param>
/// <param name="response">The response.</param>
public override void ReceivedResponse(Transaction transaction, Message response)
{
ProxyBranch branch = GetBranch(transaction);
if (branch == null)
{
Debug.Assert(false, "Invalid transaction received " + transaction);
return;
}
if (response.Is1XX() && branch.CancelRequest != null)
{
Transaction cancel = Transaction.CreateClient(Stack, this, branch.CancelRequest, transaction.Transport,
transaction.Remote);
branch.CancelRequest = null;
}
else
{
if (response.IsFinal())
{
branch.Response = response;
Stack.ReceivedResponse(this, response);
//SendResponseIfPossible();
}
else
{
response.Headers["Via"].RemoveAt(0);
if (response.Headers["Via"].Count <= 0)
{
response.Headers.Remove("Via");
}
SendResponse(response);
Stack.ReceivedResponse(this, response);
}
}
}
/// <summary>
/// Finds any other transactions.
/// </summary>
/// <param name="r">The SIP message.</param>
/// <param name="orig">The original transaction.</param>
/// <returns>Another matching transaction.</returns>
public Transaction FindOtherTransactions(Message r, Transaction orig)
{
foreach (Transaction t in Transactions.Values)
{
if ((t != orig) && (Transaction.TEquals(t, r, orig))) return t;
}
return null;
}
/// <summary>
/// Initializes a new instance of the <see cref="T:SIPLib.SIP.Proxy"/> class.
/// </summary>
/// <param name="stack">The SIP stack to use.</param>
/// <param name="request">The incoming request to proxy.</param>
/// <param name="server">if set to <c>true</c> [server].</param>
public Proxy(SIPStack stack, Message request, bool server)
: base(stack, request, server)
{
if (request == null) Debug.Assert(false, "Cannot create Proxy without incoming request");
}
//private string mergeRoutes(string message_text)
//{
// string route = "Route: ";
// StringBuilder sb = new StringBuilder();
// int index = -1;
// foreach (string line in message_text.Split(new string[] { "\r\n" }, StringSplitOptions.None))
// {
// if (line.StartsWith("Route:"))
// {
// route = route + line.Remove(0, 6) + ",";
// }
// else if (line.StartsWith("Content-Length"))
// {
// route = route.Remove(route.Length - 1);
// sb.Append(route + "\r\n");
// sb.Append(line + "\r\n");
// sb.Append("\r\n");
// index = message_text.IndexOf(line) + line.Length;
// break;
// }
// else
// {
// sb.Append(line + "\r\n");
// }
// }
// sb.Append(message_text.Substring(index));
// return sb.ToString();
//}
/// <summary>
/// Processing of raw received data
/// </summary>
/// <param name="data">The received data.</param>
/// <param name="src">The data source.</param>
public void Received(string data, string[] src)
{
// Ignore empty messages sent by the openIMS core.
if (data.Length > 2)
{
if (data.Contains("INVITE"))
{
//Hook to log particular types of messages
_log.Debug(new Message(data));
}
//try
//{
Message m = new Message(data);
SIPURI uri = new SIPURI("sip" + ":" + src[0] + ":" + src[1]);
if (m.Method != null)
{
if (!m.Headers.ContainsKey("Via"))
{
Debug.Assert(false, String.Format("No Via header in request \n{0}\n", m));
}
Header via = m.Headers["Via"].First();
if (via.ViaUri.Host != src[0] || !src[1].Equals(via.ViaUri.Port))
{
via.Attributes.Add("received", src[0]);
via.ViaUri.Host = src[0];
}
if (via.Attributes.ContainsKey("rport"))
{
via.Attributes["rport"] = src[1];
}
via.ViaUri.Port = Convert.ToInt32(src[1]);
ReceivedRequest(m, uri);
}
else if (m.ResponseCode > 0)
{
ReceivedResponse(m, uri);
}
else
{
Debug.Assert(false, String.Format("Received invalid message \n{0}\n", m));
}
//}
//catch (Exception ex)
//{
// Debug.Assert(false,
// String.Format("Error in received message \n{0}\n with error message {1}", data,
// ex.Message));
//}
}
}
public override void ReceivedRequest(UserAgent ua, Message request, SIPStack stack)
{
Log.Info("Received request with method " + request.Method.ToUpper());
Log.Debug("\n\n" + request.ToString());
if (RequestRecvEvent != null)
{
RequestRecvEvent(this, new SipMessageEventArgs(request, ua));
}
}
/// <summary>
/// Passes a received request to the associated SIP application.
/// </summary>
/// <param name="ua">The ua.</param>
/// <param name="request">The request.</param>
public void ReceivedRequest(UserAgent ua, Message request)
{
App.ReceivedRequest(ua, request, this);
}
public override void Sending(UserAgent ua, Message message, SIPStack stack)
{
if (Helpers.IsRequest(message))
{
Log.Info("Sending request with method " + message.Method);
}
else
{
Log.Info("Sending response with code " + message.ResponseCode);
}
Log.Debug("\n\n" + message.ToString());
//TODO: Allow App to modify message before it gets sent?;
}
/// <summary>
/// Passes a received response to the associated SIP application.
/// </summary>
/// <param name="ua">The ua.</param>
/// <param name="response">The response.</param>
public void ReceivedResponse(UserAgent ua, Message response)
{
App.ReceivedResponse(ua, response, this);
}
public override void Cancelled(UserAgent ua, Message request, SIPStack stack)
{
throw new NotImplementedException();
}
/// <summary>
/// Sends a particular message through the associated SIP application.
/// </summary>
/// <param name="ua">The ua.</param>
/// <param name="message">The message.</param>
public void Sending(UserAgent ua, Message message)
{
App.Sending(ua, message, this);
}
