/// <summary>
/// Default constructor.
/// </summary>
/// <param name="stack">Reference to SIP stack.</param>
/// <param name="flow">SIP data flow.</param>
/// <param name="request">Recieved request.</param>
/// <param name="transaction">SIP server transaction which must be used to send response back to request maker.</param>
internal SIP_RequestReceivedEventArgs(SIP_Stack stack, SIP_Flow flow, SIP_Request request, SIP_ServerTransaction transaction)
{
m_pStack = stack;
m_pFlow = flow;
m_pRequest = request;
m_pTransaction = transaction;
}
/// <summary>
/// Sends specified request to the specified data flow.
/// </summary>
/// <param name="flow">SIP data flow.</param>
/// <param name="request">SIP request to send.</param>
/// <exception cref="ArgumentNullException">Is raised when <b>flow</b> or <b>request</b> is null reference.</exception>
private void SendToFlow(SIP_Flow flow, SIP_Request request)
{
if (flow == null)
{
throw new ArgumentNullException("flow");
}
if (request == null)
{
throw new ArgumentNullException("request");
}
#region Contact (RFC 3261 8.1.1.8)
/*
* The Contact header field provides a SIP or SIPS URI that can be used
* to contact that specific instance of the UA for subsequent requests.
* The Contact header field MUST be present and contain exactly one SIP
* or SIPS URI in any request that can result in the establishment of a
* dialog. For the methods defined in this specification, that includes
* only the INVITE request. For these requests, the scope of the
* Contact is global. That is, the Contact header field value contains
* the URI at which the UA would like to receive requests, and this URI
* MUST be valid even if used in subsequent requests outside of any
* dialogs.
*
* If the Request-URI or top Route header field value contains a SIPS
* URI, the Contact header field MUST contain a SIPS URI as well.
*/
SIP_t_ContactParam contact = request.Contact.GetTopMostValue();
// Add contact header If request-Method can establish dialog and contact header not present.
if (SIP_Utils.MethodCanEstablishDialog(request.RequestLine.Method) && contact == null)
{
SIP_Uri from = (SIP_Uri)request.From.Address.Uri;
request.Contact.Add((flow.IsSecure ? "sips:" : "sip:") + from.User + "@" + flow.LocalPublicEP.ToString());
// REMOVE ME: 22.10.2010
//request.Contact.Add((flow.IsSecure ? "sips:" : "sip:" ) + from.User + "@" + m_pStack.TransportLayer.GetContactHost(flow).ToString());
}
// If contact SIP URI and host = auto-allocate, allocate it as needed.
else if (contact != null && contact.Address.Uri is SIP_Uri && ((SIP_Uri)contact.Address.Uri).Host == "auto-allocate")
{
((SIP_Uri)contact.Address.Uri).Host = flow.LocalPublicEP.ToString();
// REMOVE ME: 22.10.2010
//((SIP_Uri)contact.Address.Uri).Host = m_pStack.TransportLayer.GetContactHost(flow).ToString();
}
#endregion
m_pTransaction = m_pStack.TransactionLayer.CreateClientTransaction(flow, request, true);
m_pTransaction.ResponseReceived += new EventHandler <SIP_ResponseReceivedEventArgs>(ClientTransaction_ResponseReceived);
m_pTransaction.TimedOut += new EventHandler(ClientTransaction_TimedOut);
m_pTransaction.TransportError += new EventHandler <ExceptionEventArgs>(ClientTransaction_TransportError);
// Start transaction processing.
m_pTransaction.Start();
}
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="stack">Owner SIP stack.</param>
/// <param name="flow">Transaction data flow.</param>
/// <param name="request">SIP request that transaction will handle.</param>
/// <exception cref="ArgumentNullException">Is raised when <b>stack</b>,<b>flow</b> or <b>request</b> is null reference.</exception>
public SIP_Transaction(SIP_Stack stack, SIP_Flow flow, SIP_Request request)
{
if (stack == null)
{
throw new ArgumentNullException("stack");
}
if (flow == null)
{
throw new ArgumentNullException("flow");
}
if (request == null)
{
throw new ArgumentNullException("request");
}
m_pStack = stack;
m_pFlow = flow;
m_pRequest = request;
m_Method = request.RequestLine.Method;
m_CreateTime = DateTime.Now;
m_pResponses = new List <SIP_Response>();
// Validate Via:
SIP_t_ViaParm via = request.Via.GetTopMostValue();
if (via == null)
{
throw new ArgumentException("Via: header is missing !");
}
if (via.Branch == null)
{
throw new ArgumentException("Via: header 'branch' parameter is missing !");
}
m_ID = via.Branch;
if (this is SIP_ServerTransaction)
{
/*
* We use branch and sent-by as indexing key for transaction, the only special what we need to
* do is to handle CANCEL, because it has same branch as transaction to be canceled.
* For avoiding key collision, we add branch + '-' + 'sent-by' + CANCEL for cancel index key.
* ACK has also same branch, but we won't do transaction for ACK, so it isn't problem.
*/
string key = request.Via.GetTopMostValue().Branch + '-' + request.Via.GetTopMostValue().SentBy;
if (request.RequestLine.Method == SIP_Methods.CANCEL)
{
key += "-CANCEL";
}
m_Key = key;
}
else
{
m_Key = m_ID + "-" + request.RequestLine.Method;
}
}
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="stack">Owner SIP stack.</param>
/// <param name="flow">SIP data flow which received request.</param>
/// <param name="request">SIP request that transaction will handle.</param>
/// <exception cref="ArgumentNullException">Is raised when <b>stack</b>,<b>flow</b> or <b>request</b> is null reference.</exception>
/// <exception cref="ArgumentException">Is raised when any of the arguments has invalid value.</exception>
public SIP_ServerTransaction(SIP_Stack stack, SIP_Flow flow, SIP_Request request) : base(stack, flow, request)
{
// Log
if (this.Stack.Logger != null)
{
this.Stack.Logger.AddText(this.ID, "Transaction [branch='" + this.ID + "';method='" + this.Method + "';IsServer=true] created.");
}
Start();
}
/// <summary>
/// Cleans up any resources being used.
/// </summary>
public virtual void Dispose()
{
SetState(SIP_TransactionState.Disposed);
OnDisposed();
m_pStack = null;
m_pFlow = null;
m_pRequest = null;
this.StateChanged = null;
this.Disposed = null;
this.TimedOut = null;
this.TransportError = null;
}
/// <summary>
/// Creates new client transaction.
/// </summary>
/// <param name="flow">SIP data flow which is used to send request.</param>
/// <param name="request">SIP request that transaction will handle.</param>
/// <param name="addVia">If true, transaction will add <b>Via:</b> header, otherwise it's user responsibility.</param>
/// <exception cref="ObjectDisposedException">Is raised when this class is Disposed and this method is accessed.</exception>
/// <exception cref="ArgumentNullException">Is raised when <b>flow</b> or <b>request</b> is null reference.</exception>
/// <returns>Returns created transaction.</returns>
public SIP_ClientTransaction CreateClientTransaction(SIP_Flow flow, SIP_Request request, bool addVia)
{
if (m_IsDisposed)
{
throw new ObjectDisposedException(this.GetType().Name);
}
if (flow == null)
{
throw new ArgumentNullException("flow");
}
if (request == null)
{
throw new ArgumentNullException("request");
}
// Add Via:
if (addVia)
{
SIP_t_ViaParm via = new SIP_t_ViaParm();
via.ProtocolName = "SIP";
via.ProtocolVersion = "2.0";
via.ProtocolTransport = flow.Transport;
via.SentBy = new HostEndPoint("transport_layer_will_replace_it", -1);
via.Branch = SIP_t_ViaParm.CreateBranch();
via.RPort = 0;
request.Via.AddToTop(via.ToStringValue());
}
lock (m_pClientTransactions){
SIP_ClientTransaction transaction = new SIP_ClientTransaction(m_pStack, flow, request);
m_pClientTransactions.Add(transaction.Key, transaction);
transaction.StateChanged += new EventHandler(delegate(object s, EventArgs e){
if (transaction.State == SIP_TransactionState.Terminated)
{
lock (m_pClientTransactions){
m_pClientTransactions.Remove(transaction.Key);
}
}
});
SIP_Dialog dialog = MatchDialog(request);
if (dialog != null)
{
dialog.AddTransaction(transaction);
}
return(transaction);
}
}
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="stack">Owner stack.</param>
/// <param name="request">SIP request.</param>
/// <param name="flow">Active data flow what to try before RFC 3261 [4](RFC 3263) methods to use to send request.
/// This value can be null.</param>
/// <exception cref="ArgumentNullException">Is raised when <b>stack</b> or <b>request</b> is null.</exception>
internal SIP_RequestSender(SIP_Stack stack, SIP_Request request, SIP_Flow flow)
{
if (stack == null)
{
throw new ArgumentNullException("stack");
}
if (request == null)
{
throw new ArgumentNullException("request");
}
m_pStack = stack;
m_pRequest = request;
m_pFlow = flow;
m_pCredentials = new List <NetworkCredential>();
m_pHops = new Queue <SIP_Hop>();
}
/// <summary>
/// Ensures that specified request has matching server transaction. If server transaction doesn't exist,
/// it will be created, otherwise existing transaction will be returned.
/// </summary>
/// <param name="flow">SIP data flow which is used to receive request.</param>
/// <param name="request">SIP request.</param>
/// <returns>Returns matching transaction.</returns>
/// <exception cref="ArgumentNullException">Is raised when <b>flow</b> or <b>request</b> is null.</exception>
/// <exception cref="InvalidOperationException">Is raised when request.Method is ACK request.</exception>
public SIP_ServerTransaction EnsureServerTransaction(SIP_Flow flow, SIP_Request request)
{
if (flow == null)
{
throw new ArgumentNullException("flow");
}
if (request == null)
{
throw new ArgumentNullException("request");
}
if (request.RequestLine.Method == SIP_Methods.ACK)
{
throw new InvalidOperationException("ACK request is transaction less request, can't create transaction for it.");
}
/*
* We use branch and sent-by as indexing key for transaction, the only special what we need to
* do is to handle CANCEL, because it has same branch as transaction to be canceled.
* For avoiding key collision, we add branch + '-' + 'sent-by' + CANCEL for cancel index key.
* ACK has also same branch, but we won't do transaction for ACK, so it isn't problem.
*/
string key = request.Via.GetTopMostValue().Branch + '-' + request.Via.GetTopMostValue().SentBy;
if (request.RequestLine.Method == SIP_Methods.CANCEL)
{
key += "-CANCEL";
}
lock (m_pServerTransactions){
SIP_ServerTransaction retVal = null;
m_pServerTransactions.TryGetValue(key, out retVal);
// We don't have transaction, create it.
if (retVal == null)
{
retVal = CreateServerTransaction(flow, request);
}
return(retVal);
}
}
/// <summary>
/// Cleans up any resources being used.
/// </summary>
public virtual void Dispose()
{
lock (m_pLock){
if (this.State == SIP_DialogState.Disposed)
{
return;
}
SetState(SIP_DialogState.Disposed, true);
this.RequestReceived = null;
m_pStack = null;
m_CallID = null;
m_LocalTag = null;
m_RemoteTag = null;
m_pLocalUri = null;
m_pRemoteUri = null;
m_pLocalContact = null;
m_pRemoteTarget = null;
m_pRouteSet = null;
m_pFlow = null;
}
}
/// <summary>
/// Creates new SIP server transaction for specified request.
/// </summary>
/// <param name="flow">SIP data flow which is used to receive request.</param>
/// <param name="request">SIP request.</param>
/// <returns>Returns added server transaction.</returns>
/// <exception cref="ObjectDisposedException">Is raised when this class is Disposed and this method is accessed.</exception>
/// <exception cref="ArgumentNullException">Is raised when <b>flow</b> or <b>request</b> is null reference.</exception>
public SIP_ServerTransaction CreateServerTransaction(SIP_Flow flow, SIP_Request request)
{
if (m_IsDisposed)
{
throw new ObjectDisposedException(this.GetType().Name);
}
if (flow == null)
{
throw new ArgumentNullException("flow");
}
if (request == null)
{
throw new ArgumentNullException("request");
}
lock (m_pServerTransactions){
SIP_ServerTransaction transaction = new SIP_ServerTransaction(m_pStack, flow, request);
m_pServerTransactions.Add(transaction.Key, transaction);
transaction.StateChanged += new EventHandler(delegate(object s, EventArgs e){
if (transaction.State == SIP_TransactionState.Terminated)
{
lock (m_pClientTransactions){
m_pServerTransactions.Remove(transaction.Key);
}
}
});
SIP_Dialog dialog = MatchDialog(request);
if (dialog != null)
{
dialog.AddTransaction(transaction);
}
return(transaction);
}
}
/// <summary>
/// Initializes dialog.
/// </summary>
/// <param name="stack">Owner stack.</param>
/// <param name="transaction">Owner transaction.</param>
/// <param name="response">SIP response what caused dialog creation.</param>
/// <exception cref="ArgumentNullException">Is raised when <b>stack</b>,<b>transaction</b> or <b>response</b>.</exception>
internal protected virtual void Init(SIP_Stack stack, SIP_Transaction transaction, SIP_Response response)
{
if (stack == null)
{
throw new ArgumentNullException("stack");
}
if (transaction == null)
{
throw new ArgumentNullException("transaction");
}
if (response == null)
{
throw new ArgumentNullException("response");
}
m_pStack = stack;
#region UAS
/* RFC 3261 12.1.1.
* The UAS then constructs the state of the dialog. This state MUST be
* maintained for the duration of the dialog.
*
* If the request arrived over TLS, and the Request-URI contained a SIPS
* URI, the "secure" flag is set to TRUE.
*
* The route set MUST be set to the list of URIs in the Record-Route
* header field from the request, taken in order and preserving all URI
* parameters. If no Record-Route header field is present in the
* request, the route set MUST be set to the empty set. This route set,
* even if empty, overrides any pre-existing route set for future
* requests in this dialog. The remote target MUST be set to the URI
* from the Contact header field of the request.
*
* The remote sequence number MUST be set to the value of the sequence
* number in the CSeq header field of the request. The local sequence
* number MUST be empty. The call identifier component of the dialog ID
* MUST be set to the value of the Call-ID in the request. The local
* tag component of the dialog ID MUST be set to the tag in the To field
* in the response to the request (which always includes a tag), and the
* remote tag component of the dialog ID MUST be set to the tag from the
* From field in the request. A UAS MUST be prepared to receive a
* request without a tag in the From field, in which case the tag is
* considered to have a value of null.
*
* This is to maintain backwards compatibility with RFC 2543, which
* did not mandate From tags.
*
* The remote URI MUST be set to the URI in the From field, and the
* local URI MUST be set to the URI in the To field.
*/
if (transaction is SIP_ServerTransaction)
{
m_IsSecure = ((SIP_Uri)transaction.Request.RequestLine.Uri).IsSecure;
m_pRouteSet = (SIP_t_AddressParam[])Net_Utils.ReverseArray(transaction.Request.RecordRoute.GetAllValues());
m_pRemoteTarget = (SIP_Uri)transaction.Request.Contact.GetTopMostValue().Address.Uri;
m_RemoteSeqNo = transaction.Request.CSeq.SequenceNumber;
m_LocalSeqNo = 0;
m_CallID = transaction.Request.CallID;
m_LocalTag = response.To.Tag;
m_RemoteTag = transaction.Request.From.Tag;
m_pRemoteUri = transaction.Request.From.Address.Uri;
m_pLocalUri = transaction.Request.To.Address.Uri;
m_pLocalContact = (SIP_Uri)response.Contact.GetTopMostValue().Address.Uri;
List <string> allow = new List <string>();
foreach (SIP_t_Method m in response.Allow.GetAllValues())
{
allow.Add(m.Method);
}
m_pRemoteAllow = allow.ToArray();
List <string> supported = new List <string>();
foreach (SIP_t_OptionTag s in response.Supported.GetAllValues())
{
supported.Add(s.OptionTag);
}
m_pRemoteSupported = supported.ToArray();
}
#endregion
#region UAC
/* RFC 3261 12.1.2.
* When a UAC receives a response that establishes a dialog, it
* constructs the state of the dialog. This state MUST be maintained
* for the duration of the dialog.
*
* If the request was sent over TLS, and the Request-URI contained a
* SIPS URI, the "secure" flag is set to TRUE.
*
* The route set MUST be set to the list of URIs in the Record-Route
* header field from the response, taken in reverse order and preserving
* all URI parameters. If no Record-Route header field is present in
* the response, the route set MUST be set to the empty set. This route
* set, even if empty, overrides any pre-existing route set for future
* requests in this dialog. The remote target MUST be set to the URI
* from the Contact header field of the response.
*
* The local sequence number MUST be set to the value of the sequence
* number in the CSeq header field of the request. The remote sequence
* number MUST be empty (it is established when the remote UA sends a
* request within the dialog). The call identifier component of the
* dialog ID MUST be set to the value of the Call-ID in the request.
* The local tag component of the dialog ID MUST be set to the tag in
* the From field in the request, and the remote tag component of the
* dialog ID MUST be set to the tag in the To field of the response. A
* UAC MUST be prepared to receive a response without a tag in the To
* field, in which case the tag is considered to have a value of null.
*
* This is to maintain backwards compatibility with RFC 2543, which
* did not mandate To tags.
*
* The remote URI MUST be set to the URI in the To field, and the local
* URI MUST be set to the URI in the From field.
*/
else
{
// TODO: Validate request or client transaction must do it ?
m_IsSecure = ((SIP_Uri)transaction.Request.RequestLine.Uri).IsSecure;
m_pRouteSet = (SIP_t_AddressParam[])Net_Utils.ReverseArray(response.RecordRoute.GetAllValues());
m_pRemoteTarget = (SIP_Uri)response.Contact.GetTopMostValue().Address.Uri;
m_LocalSeqNo = transaction.Request.CSeq.SequenceNumber;
m_RemoteSeqNo = 0;
m_CallID = transaction.Request.CallID;
m_LocalTag = transaction.Request.From.Tag;
m_RemoteTag = response.To.Tag;
m_pRemoteUri = transaction.Request.To.Address.Uri;
m_pLocalUri = transaction.Request.From.Address.Uri;
m_pLocalContact = (SIP_Uri)transaction.Request.Contact.GetTopMostValue().Address.Uri;
List <string> allow = new List <string>();
foreach (SIP_t_Method m in response.Allow.GetAllValues())
{
allow.Add(m.Method);
}
m_pRemoteAllow = allow.ToArray();
List <string> supported = new List <string>();
foreach (SIP_t_OptionTag s in response.Supported.GetAllValues())
{
supported.Add(s.OptionTag);
}
m_pRemoteSupported = supported.ToArray();
}
#endregion
m_pFlow = transaction.Flow;
AddTransaction(transaction);
}
/// <summary>
/// Processes specified request through this transaction.
/// </summary>
/// <param name="flow">SIP data flow.</param>
/// <param name="request">SIP request.</param>
/// <exception cref="ArgumentNullException">Is raised when <b>flow</b> or <b>request</b> is null reference.</exception>
internal void ProcessRequest(SIP_Flow flow, SIP_Request request)
{
if (flow == null)
{
throw new ArgumentNullException("flow");
}
if (request == null)
{
throw new ArgumentNullException("request");
}
lock (this.SyncRoot){
if (this.State == SIP_TransactionState.Disposed)
{
return;
}
try{
// Log
if (this.Stack.Logger != null)
{
byte[] requestData = request.ToByteData();
this.Stack.Logger.AddRead(
Guid.NewGuid().ToString(),
null,
0,
"Request [transactionID='" + this.ID + "'; method='" + request.RequestLine.Method + "'; cseq='" + request.CSeq.SequenceNumber + "'; " +
"transport='" + flow.Transport + "'; size='" + requestData.Length + "'; received '" + flow.LocalEP + "' <- '" + flow.RemoteEP + "'.",
flow.LocalEP,
flow.RemoteEP,
requestData
);
}
#region INVITE
if (this.Method == SIP_Methods.INVITE)
{
#region INVITE
if (request.RequestLine.Method == SIP_Methods.INVITE)
{
if (this.State == SIP_TransactionState.Proceeding)
{
/* RFC 3261 17.2.1.
* If a request retransmission is received while in the "Proceeding" state, the most recent provisional
* response that was received from the TU MUST be passed to the transport layer for retransmission.
*/
SIP_Response response = this.LastProvisionalResponse;
if (response != null)
{
this.Stack.TransportLayer.SendResponse(this, response);
}
}
else if (this.State == SIP_TransactionState.Completed)
{
/* RFC 3261 17.2.1.
* While in the "Completed" state, if a request retransmission is received, the server SHOULD
* pass the response to the transport for retransmission.
*/
this.Stack.TransportLayer.SendResponse(this, this.FinalResponse);
}
}
#endregion
#region ACK
else if (request.RequestLine.Method == SIP_Methods.ACK)
{
#region Accepeted
if (this.State == SIP_TransactionState.Accpeted)
{
}
#endregion
#region Completed
else if (this.State == SIP_TransactionState.Completed)
{
/* RFC 3261 17.2.1
* If an ACK is received while the server transaction is in the "Completed" state, the server transaction
* MUST transition to the "Confirmed" state. As Timer G is ignored in this state, any retransmissions of the
* response will cease.
*
* When this state is entered, timer I is set to fire in T4 seconds for unreliable transports,
* and zero seconds for reliable transports.
*/
SetState(SIP_TransactionState.Confirmed);
// Stop timers G,H
if (m_pTimerG != null)
{
m_pTimerG.Dispose();
m_pTimerG = null;
// Log
if (this.Stack.Logger != null)
{
this.Stack.Logger.AddText(this.ID, "Transaction [branch='" + this.ID + "';method='" + this.Method + "';IsServer=true] timer G(INVITE response(3xx - 6xx) retransmission) stopped.");
}
}
if (m_pTimerH != null)
{
m_pTimerH.Dispose();
m_pTimerH = null;
// Log
if (this.Stack.Logger != null)
{
this.Stack.Logger.AddText(this.ID, "Transaction [branch='" + this.ID + "';method='" + this.Method + "';IsServer=true] timer H(INVITE ACK wait) stopped.");
}
}
// Start timer I.
m_pTimerI = new TimerEx((flow.IsReliable ? 0 : SIP_TimerConstants.T4), false);
m_pTimerI.Elapsed += new System.Timers.ElapsedEventHandler(m_pTimerI_Elapsed);
// Log
if (this.Stack.Logger != null)
{
this.Stack.Logger.AddText(this.ID, "Transaction [branch='" + this.ID + "';method='" + this.Method + "';IsServer=true] timer I(INVITE ACK retransission wait) started, will trigger after " + m_pTimerI.Interval + ".");
}
m_pTimerI.Enabled = true;
}
#endregion
}
#endregion
}
#endregion
#region Non-INVITE
else
{
// Non-INVITE transaction may have only request retransmission requests.
if (this.Method == request.RequestLine.Method)
{
if (this.State == SIP_TransactionState.Proceeding)
{
/* RFC 3261 17.2.2.
* If a retransmission of the request is received while in the "Proceeding" state, the most
* recently sent provisional response MUST be passed to the transport layer for retransmission.
*/
this.Stack.TransportLayer.SendResponse(this, this.LastProvisionalResponse);
}
else if (this.State == SIP_TransactionState.Completed)
{
/* RFC 3261 17.2.2.
* While in the "Completed" state, the server transaction MUST pass the final response to the transport
* layer for retransmission whenever a retransmission of the request is received.
*/
this.Stack.TransportLayer.SendResponse(this, this.FinalResponse);
}
}
}
#endregion
}
catch (SIP_TransportException x) {
// Log
if (this.Stack.Logger != null)
{
this.Stack.Logger.AddText(this.ID, "Transaction [branch='" + this.ID + "';method='" + this.Method + "';IsServer=true] transport exception: " + x.Message);
}
OnTransportError(x);
}
}
}
/// <summary>
/// Is called when client transactions receives response.
/// </summary>
/// <param name="sender">Sender.</param>
/// <param name="e">Event data.</param>
private void ClientTransaction_ResponseReceived(object sender, SIP_ResponseReceivedEventArgs e)
{
lock (m_pLock){
m_pFlow = e.ClientTransaction.Request.Flow;
if (e.Response.StatusCode == 401 || e.Response.StatusCode == 407)
{
// Check if authentication failed(We sent authorization data and it's challenged again,
// probably user name or password inccorect)
bool hasFailedAuthorization = false;
foreach (SIP_t_Challenge challange in e.Response.WWWAuthenticate.GetAllValues())
{
foreach (SIP_t_Credentials credentials in m_pTransaction.Request.Authorization.GetAllValues())
{
if (new Auth_HttpDigest(challange.AuthData, "").Realm == new Auth_HttpDigest(credentials.AuthData, "").Realm)
{
hasFailedAuthorization = true;
break;
}
}
}
foreach (SIP_t_Challenge challange in e.Response.ProxyAuthenticate.GetAllValues())
{
foreach (SIP_t_Credentials credentials in m_pTransaction.Request.ProxyAuthorization.GetAllValues())
{
if (new Auth_HttpDigest(challange.AuthData, "").Realm == new Auth_HttpDigest(credentials.AuthData, "").Realm)
{
hasFailedAuthorization = true;
break;
}
}
}
// Authorization failed, pass response to UA.
if (hasFailedAuthorization)
{
OnResponseReceived(e.Response);
}
// Try to authorize challanges.
else
{
SIP_Request request = m_pRequest.Copy();
/* RFC 3261 22.2.
* When a UAC resubmits a request with its credentials after receiving a
* 401 (Unauthorized) or 407 (Proxy Authentication Required) response,
* it MUST increment the CSeq header field value as it would normally
* when sending an updated request.
*/
request.CSeq = new SIP_t_CSeq(m_pStack.ConsumeCSeq(), request.CSeq.RequestMethod);
// All challanges authorized, resend request.
if (Authorize(request, e.Response, this.Credentials.ToArray()))
{
SIP_Flow flow = m_pTransaction.Flow;
CleanUpActiveTransaction();
SendToFlow(flow, request);
}
// We don't have credentials for one or more challenges.
else
{
OnResponseReceived(e.Response);
}
}
}
else
{
OnResponseReceived(e.Response);
if (e.Response.StatusCodeType != SIP_StatusCodeType.Provisional)
{
OnCompleted();
}
}
}
}
/// <summary>
/// Default constructor.
/// </summary>
/// <param name="stack">Reference to SIP stack.</param>
/// <param name="flow">SIP data flow.</param>
/// <param name="request">Recieved request.</param>
internal SIP_RequestReceivedEventArgs(SIP_Stack stack, SIP_Flow flow, SIP_Request request) : this(stack, flow, request, null)
{
}
/// <summary>
/// This method is called when REGISTER has finished.
/// </summary>
/// <param name="sender">Sender.</param>
/// <param name="e">Event data.</param>
private void m_pRegisterSender_ResponseReceived(object sender, SIP_ResponseReceivedEventArgs e)
{
m_pFlow = e.ClientTransaction.Flow;
if (e.Response.StatusCodeType == SIP_StatusCodeType.Provisional)
{
return;
}
else if (e.Response.StatusCodeType == SIP_StatusCodeType.Success)
{
m_pContacts.Clear();
foreach (SIP_t_ContactParam c in e.Response.Contact.GetAllValues())
{
m_pContacts.Add(c.Address.Uri);
}
SetState(SIP_UA_RegistrationState.Registered);
OnRegistered();
m_pFlow.SendKeepAlives = true;
}
else
{
SetState(SIP_UA_RegistrationState.Error);
OnError(e);
}
// REMOVE ME:
if (this.AutoFixContact && (m_pContact is SIP_Uri))
{
// If Via: received or rport paramter won't match to our sent-by, use received and rport to construct new contact value.
SIP_Uri cContact = ((SIP_Uri)m_pContact);
IPAddress cContactIP = Net_Utils.IsIPAddress(cContact.Host) ? IPAddress.Parse(cContact.Host) : null;
SIP_t_ViaParm via = e.Response.Via.GetTopMostValue();
if (via != null && cContactIP != null)
{
IPEndPoint ep = new IPEndPoint(via.Received != null ? via.Received : cContactIP, via.RPort > 0 ? via.RPort : cContact.Port);
if (!cContactIP.Equals(ep.Address) || cContact.Port != via.RPort)
{
// Unregister old contact.
BeginUnregister(false);
// Fix contact.
cContact.Host = ep.Address.ToString();
cContact.Port = ep.Port;
m_pRegisterSender.Dispose();
m_pRegisterSender = null;
BeginRegister(m_AutoRefresh);
return;
}
}
}
if (m_AutoRefresh)
{
// Set registration refresh timer.
m_pTimer.Enabled = true;
}
m_pRegisterSender.Dispose();
m_pRegisterSender = null;
}