/// <summary>
/// Matches specified SIP response to SIP dialog. If no matching dialog found, returns null.
/// </summary>
/// <param name="response">SIP response.</param>
/// <returns>Returns matched SIP dialog or null in no match found.</returns>
/// <exception cref="ArgumentNullException">Is raised when <b>response</b> is null.</exception>
internal SIP_Dialog MatchDialog(SIP_Response response)
{
if (response == null)
{
throw new ArgumentNullException("response");
}
SIP_Dialog dialog = null;
try
{
string callID = response.CallID;
string fromTag = response.From.Tag;
string toTag = response.To.Tag;
if (callID != null && fromTag != null && toTag != null)
{
string dialogID = callID + "-" + fromTag + "-" + toTag;
lock (m_pDialogs)
{
m_pDialogs.TryGetValue(dialogID, out dialog);
}
}
}
catch {}
return(dialog);
}
/// <summary>
/// Matches specified SIP request to SIP dialog. If no matching dialog found, returns null.
/// </summary>
/// <param name="request">SIP request.</param>
/// <returns>Returns matched SIP dialog or null in no match found.</returns>
/// <exception cref="ArgumentNullException">Is raised when <b>request</b> is null.</exception>
internal SIP_Dialog MatchDialog(SIP_Request request)
{
if (request == null)
{
throw new ArgumentNullException("request");
}
SIP_Dialog dialog = null;
try
{
string callID = request.CallID;
string localTag = request.To.Tag;
string remoteTag = request.From.Tag;
if (callID != null && localTag != null && remoteTag != null)
{
string dialogID = callID + "-" + localTag + "-" + remoteTag;
lock (m_pDialogs)
{
m_pDialogs.TryGetValue(dialogID, out dialog);
}
}
}
catch {}
return(dialog);
}
/// <summary>
/// Removes specified dialog from dialogs collection.
/// </summary>
/// <param name="dialog">SIP dialog to remove.</param>
internal void RemoveDialog(SIP_Dialog dialog)
{
lock (m_pDialogs)
{
m_pDialogs.Remove(dialog.ID);
}
}
/// <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="dialog">SIP dialog which received 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_Dialog dialog,
SIP_ServerTransaction transaction)
{
m_pStack = stack;
m_pFlow = flow;
m_pRequest = request;
m_pDialog = dialog;
m_pTransaction = transaction;
}
/// <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="dialog">SIP dialog which received 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_Dialog dialog,
SIP_ServerTransaction transaction)
{
m_pStack = stack;
m_pFlow = flow;
m_pRequest = request;
m_pDialog = dialog;
m_pTransaction = transaction;
}
/// <summary>
/// Gets existing or creates new dialog.
/// </summary>
/// <param name="transaction">Owner transaction what forces to create dialog.</param>
/// <param name="response">Response what forces to create dialog.</param>
/// <returns>Returns dialog.</returns>
/// <exception cref="ArgumentNullException">Is raised when <b>transaction</b> or <b>response</b> is null.</exception>
public SIP_Dialog GetOrCreateDialog(SIP_Transaction transaction, SIP_Response response)
{
if (transaction == null)
{
throw new ArgumentNullException("transaction");
}
if (response == null)
{
throw new ArgumentNullException("response");
}
string dialogID = "";
if (transaction is SIP_ServerTransaction)
{
dialogID = response.CallID + "-" + response.To.Tag + "-" + response.From.Tag;
}
else
{
dialogID = response.CallID + "-" + response.From.Tag + "-" + response.To.Tag;
}
lock (m_pDialogs)
{
SIP_Dialog dialog = null;
m_pDialogs.TryGetValue(dialogID, out dialog);
// Dialog doesn't exist, create it.
if (dialog == null)
{
if (response.CSeq.RequestMethod.ToUpper() == SIP_Methods.INVITE)
{
dialog = new SIP_Dialog_Invite();
dialog.Init(m_pStack, transaction, response);
dialog.StateChanged += delegate
{
if (dialog.State == SIP_DialogState.Terminated)
{
m_pDialogs.Remove(dialog.ID);
}
};
m_pDialogs.Add(dialog.ID, dialog);
}
else
{
throw new ArgumentException("Method '" + response.CSeq.RequestMethod +
"' has no dialog handler.");
}
}
return(dialog);
}
}
/// <summary>
/// Removes specified dialog from dialogs collection.
/// </summary>
/// <param name="dialog">SIP dialog to remove.</param>
internal void RemoveDialog(SIP_Dialog dialog)
{
lock (m_pDialogs)
{
m_pDialogs.Remove(dialog.ID);
}
}
