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public static CreateResponse ( int responseCode, string responseText, Dictionary |
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| responseCode | int | The response code (200 etc.) |
| responseText | string | The response text (OK etc.) |
| headers | Dictionary |
The SIP headers. |
| content | string | The SIP body content. |
| originalRequest | The original request. | |
| return | ||
/// <summary>
/// Raises an error (Service unavailable etc)
/// </summary>
/// <param name="transaction">The transaction.</param>
/// <param name="error">The error.</param>
public override void Error(Transaction transaction, string error)
{
if (transaction == null)
{
Transaction = null;
if (!Request.Method.ToUpper().Contains("ACK"))
{
Message response = Message.CreateResponse(503, "Service unavailable - " + error, null, null,
Request);
SendResponse(response);
return;
}
Debug.Assert(false, "Warning, dropping ACK");
}
ProxyBranch branch = GetBranch(transaction);
if (branch == null)
{
return;
}
Transaction = null;
branch.Transaction = null;
if (branch.RemoteCandidates != null && branch.RemoteCandidates.Count > 0)
{
RetryNextCandidate(branch);
}
else
{
ReceivedResponse(null,
Message.CreateResponse(503, "Service unavailable - " + error, null, null,
branch.Request));
}
}
/// <summary>
/// Creates a SIP response.
/// </summary>
/// <param name="responseCode">The response code.</param>
/// <param name="responseText">The response text.</param>
/// <returns>The created SIP response.</returns>
public virtual Message CreateResponse(int responseCode, string responseText)
{
Message m = null;
if (Request != null && Server)
{
m = Message.CreateResponse(responseCode, responseText, null, null, Request);
if (responseCode != 100 && !m.Headers["To"][0].Attributes.ContainsKey("tag"))
{
m.Headers["To"][0].Attributes.Add("tag", Tag);
}
}
return(m);
}
/// <summary>
/// Handles request timeouts
/// </summary>
/// <param name="transaction">The transaction.</param>
private void TimeOut(Transaction transaction)
{
ProxyBranch branch = GetBranch(transaction);
if (branch == null)
{
return;
}
branch.Transaction = null;
if (branch.RemoteCandidates != null && branch.RemoteCandidates.Count > 0)
{
RetryNextCandidate(branch);
}
else
{
ReceivedResponse(null, Message.CreateResponse(408, "Request timeout", null, null, branch.Request));
}
}
/// <summary>
/// Triggered on timeout.
/// </summary>
/// <param name="transaction">The transaction.</param>
public virtual void Timeout(Transaction transaction)
{
if ((transaction != null) && (transaction != Transaction))
{
return;
}
Transaction = null;
if (Server == false)
{
if ((RemoteCandidates != null) && (RemoteCandidates.Count > 0))
{
RetryNextCandidate();
}
else
{
ReceivedResponse(null, Message.CreateResponse(408, "Request Timeout", null, null, Request));
}
}
}
/// <summary>
/// Creates a SIP response, filling in the necessary parameters from the dialog.
/// </summary>
/// <param name="response_code">The SIP response_code.</param>
/// <param name="response_text">The SIP response_text.</param>
/// <param name="content">The SIP body contents.</param>
/// <param name="contentType">The type of the SIP body.</param>
/// <returns>Message.</returns>
public override Message CreateResponse(int response_code, string response_text, string content = null,
string contentType = null)
{
if (Servers.Count == 0)
{
Debug.Assert(false, String.Format("No server transaction to create response"));
return(null);
}
// TODO REMOVE THIS LOGIC
//string branchID = ((Message)response).First("Via").Attributes["branch"];
//Transaction = null;
//foreach (Transaction transaction in Servers)
//{
// if (branchID == transaction.Branch)
// {
// Transaction = transaction;
// Request = transaction.Request;
// }
//}
//if (Transaction == null)
//{
// Debug.Assert(false, String.Format("No transactions in dialog matched"));
// return;
//}
if (Servers.Count > 1)
{
Console.WriteLine("Got some transaction servers");
}
Message request = Servers[Servers.Count - 1].Request;
Message response = Message.CreateResponse(response_code, response_text, null, content, request);
if (!string.IsNullOrEmpty(contentType))
{
response.InsertHeader(new Header(contentType, "Content-Type"));
}
if (response.ResponseCode != 100 && !response.Headers["To"][0].Attributes.ContainsKey("tag"))
{
response.Headers["To"][0].Attributes["tag"] = LocalTag;
}
return(response);
}
/// <summary>
/// Creates a SIP response given the response code and responseText
/// </summary>
/// <param name="responseCode">The response code.</param>
/// <param name="responseText">The response text.</param>
/// <param name="content">The content.</param>
/// <param name="contentType">Type of the content.</param>
/// <returns>Message.</returns>
public virtual Message CreateResponse(int responseCode, string responseText, string content = null,
string contentType = null)
{
if (Request == null)
{
Debug.Assert(false, String.Format("Invalid request in creating a response"));
return(null);
}
Message responseMessage = Message.CreateResponse(responseCode, responseText, null, content, Request);
if (contentType != null)
{
responseMessage.InsertHeader(new Header(contentType, "Content-Type"));
}
if (responseMessage.ResponseCode != 100 && !responseMessage.Headers["To"][0].ToString().Contains("tag"))
{
responseMessage.Headers["To"][0].Attributes.Add("tag", LocalTag);
}
return(responseMessage);
}
/// <summary>
/// Raises an error
/// </summary>
/// <param name="t">The transaction.</param>
/// <param name="error">The error.</param>
public virtual void Error(Transaction t, string error)
{
if ((t != null) && t != Transaction)
{
return;
}
Transaction = null;
if (Server == false)
{
if ((RemoteCandidates != null) && (RemoteCandidates.Count > 0))
{
RetryNextCandidate();
}
else
{
ReceivedResponse(null,
Message.CreateResponse(503, "Service unavailable - " + error, null, null, Request));
}
}
}
/// <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);
}
}
