internal const Int64 SHUTDOWN_TIMEOUT = 2000; /* miliseconds. */
internal TSIP_Dialog(tsip_dialog_type_t type, String callId, TSip_Session session)
{
mId = sUniqueId++;
mRecordRoutes = new List <TSIP_HeaderRecordRoute>();
mChallenges = new List <TSIP_Challenge>();
mPaths = new List <TSIP_Uri>();
mServiceRoutes = new List <TSIP_Uri>();
mAssociatedUris = new List <TSIP_Uri>();
mState = tsip_dialog_state_t.Initial;
mType = type;
mCallId = String.IsNullOrEmpty(callId) ? TSIP_HeaderCallId.RandomCallId() : callId;
mSipSession = session;
/* Sets some default values */
mExpires = TSip_Session.DEFAULT_EXPIRES;
mTagLocal = TSK_String.Random();
mCSeqValue = (UInt32) new Random().Next();
/*=== SIP Session ===*/
if (mSipSession != null)
{
mExpires = mSipSession.Expires;
mUriLocal = !String.IsNullOrEmpty(callId) /* Server Side */ ? mSipSession.UriTo : mSipSession.UriFrom;
if (mSipSession.UriTo != null)
{
mUriRemote = mSipSession.UriTo;
mUriRemoteTarget = mSipSession.UriTo;
}
else
{
mUriRemote = mSipSession.UriFrom;
mUriRemoteTarget = mSipSession.Stack.Realm;
}
}
else
{
TSK_Debug.Error("Invalid Sip Session");
}
}
/// <summary>
/// Updates the dialog state:
/// - Authorizations (using challenges from the @a response message)
/// - State (early, established, disconnected, ...)
/// - Routes (and Service-Route)
/// - Target (remote)
/// - ...
/// </summary>
/// <param name="response"></param>
/// <returns></returns>
protected Boolean UpdateWithResponse(TSIP_Response response)
{
if (response == null || response.To == null || response.CSeq == null)
{
return(false);
}
String tag = response.To.Tag;
/*
* 1xx (!100) or 2xx
*/
/*
* 401 or 407 or 421 or 494
*/
if (response.StatusCode == 401 || response.StatusCode == 407 || response.StatusCode == 421 || response.StatusCode == 494)
{
Boolean acceptNewVector;
/* 3GPP IMS - Each authentication vector is used only once.
* ==> Re-registration/De-registration ==> Allow 401/407 challenge.
*/
acceptNewVector = (response.CSeq.RequestType == TSIP_Message.tsip_request_type_t.REGISTER && this.State == tsip_dialog_state_t.Established);
return(this.UpdateChallenges(response, acceptNewVector));
}
else if (100 < response.StatusCode && response.StatusCode < 300)
{
tsip_dialog_state_t state = this.State;
/* 1xx */
if (response.StatusCode <= 199)
{
if (String.IsNullOrEmpty(response.To.Tag))
{
TSK_Debug.Error("Invalid tag parameter");
return(false);
}
state = tsip_dialog_state_t.Early;
}
/* 2xx */
else
{
state = tsip_dialog_state_t.Established;
}
/* Remote target */
{
/* RFC 3261 12.2.1.2 Processing the Responses
* When a UAC receives a 2xx response to a target refresh request, it
* MUST replace the dialog's remote target URI with the URI from the
* Contact header field in that response, if present.
*
* FIXME: Because PRACK/UPDATE sent before the session is established MUST have
* the rigth target URI to be delivered to the UAS ==> Do not not check that we are connected
*/
if (response.CSeq.RequestType != TSIP_Message.tsip_request_type_t.REGISTER && response.Contact != null && response.Contact.Uri != null)
{
mUriRemoteTarget = response.Contact.Uri.Clone(true, false);
}
}
/* Route sets */
{
int index;
TSIP_HeaderRecordRoute recordRoute;
mRecordRoutes.Clear();
for (index = 0; (recordRoute = response.GetHeaderAtIndex(TSIP_Header.tsip_header_type_t.Record_Route, index) as TSIP_HeaderRecordRoute) != null; index++)
{
mRecordRoutes.Insert(0, recordRoute); /* Copy reversed. */
}
}
/* cseq + tags + ... */
if (this.State == tsip_dialog_state_t.Established && String.Equals(mTagRemote, tag, StringComparison.InvariantCultureIgnoreCase))
{
return(true);
}
else
{
if (response.CSeq.RequestType != TSIP_Message.tsip_request_type_t.REGISTER && response.CSeq.RequestType != TSIP_Message.tsip_request_type_t.PUBLISH)
{ /* REGISTER and PUBLISH don't establish dialog */
mTagRemote = tag;
}
#if NEVER_EXECUTE_00 // PRACK and BYE will have same CSeq value ==> Let CSeq value to be incremented by "tsip_dialog_request_new()"
self->cseq_value = response->CSeq ? response->CSeq->seq : self->cseq_value;
#endif
}
this.State = state;
return(true);
}
return(true);
}
