private void ResetCNonce()
{
if (!String.IsNullOrEmpty(mQop))
{
mCnonce = TSK_MD5.Compute(TSK_String.Random());
mNc = 1;
}
}
internal TSIP_DialogLayer(TSIP_Stack stack)
{
mStack = stack;
mDialogs = new Dictionary <Int64, TSIP_Dialog>();
#if WINDOWS_PHONE
mMutex = new Mutex(false, TSK_String.Random());
#else
mMutex = new Mutex();
#endif
}
internal TSIP_TransportLayer(TSIP_Stack stack)
{
mStack = stack;
mTransports = new List <TSIP_Transport>();
#if WINDOWS_PHONE
mMutex = new Mutex(false, TSK_String.Random());
#else
mMutex = new Mutex();
#endif
}
internal TSIP_TransacLayer(TSIP_Stack stack)
{
mSipStack = stack;
mTransactions = new Dictionary <Int64, TSIP_Transac>();
mReliable = TNET_Socket.IsStreamType(mSipStack.ProxyType);
#if WINDOWS_PHONE
mMutex = new Mutex(false, TSK_String.Random());
#else
mMutex = new Mutex();
#endif
}
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");
}
}
internal override Boolean Start(TSIP_Request request)
{
if (request != null && !base.Running)
{
/* Add branch to the new client transaction
* IMPORTANT: CANCEL will have the same Via and Contact headers as the request it cancel
*/
if (request.IsCANCEL)
{
base.Branch = request.FirstVia != null ? request.FirstVia.Branch : "doubango";
}
else
{
base.Branch = String.Format("{0}_{1}", TSIP_Transac.MAGIC_COOKIE, TSK_String.Random());
}
base.Running = true;
mRequest = request;
return(base.ExecuteAction((Int32)FSMAction.Send, request));
}
return(false);
}
/// <summary>
/// add Via header using the transport config
/// </summary>
/// <param name="branch"></param>
/// <param name="msg"></param>
private Boolean AddViaToMessage(String branch, TSIP_Message msg)
{
String ip;
ushort port;
if (!this.GetLocalIpAndPort(out ip, out port))
{
return(false);
}
#if WINDOWS_PHONE
if (port == 0 && (mStack.AoRPort != 0 && !String.IsNullOrEmpty(mStack.AoRIP)))
{
port = mStack.AoRPort;
ip = mStack.AoRIP;
}
#endif
/* is there a Via header? */
if (msg.FirstVia == null)
{
/* RFC 3261 - 18.1.1 Sending Requests
* Before a request is sent, the client transport MUST insert a value of
* the "sent-by" field into the Via header field. This field contains
* an IP address or host name, and port. The usage of an FQDN is
* RECOMMENDED. This field is used for sending responses under certain
* conditions, described below. If the port is absent, the default
* value depends on the transport. It is 5060 for UDP, TCP and SCTP,
* 5061 for TLS.
*/
msg.FirstVia = new TSIP_HeaderVia(TSIP_HeaderVia.PROTO_NAME_DEFAULT, TSIP_HeaderVia.PROTO_VERSION_DEFAULT,
this.ViaProtocol, ip, (UInt16)port);
msg.FirstVia.Params.Add(new TSK_Param("rport"));
}
/* updates the branch */
if (!String.IsNullOrEmpty(branch))
{
msg.FirstVia.Branch = branch;
}
else
{
msg.FirstVia.Branch = String.Format("{0}_{1}", TSIP_Transac.MAGIC_COOKIE, TSK_String.Random());
}
/* multicast case */
if (false)
{
/* RFC 3261 - 18.1.1 Sending Requests (FIXME)
* A client that sends a request to a multicast address MUST add the
* "maddr" parameter to its Via header field value containing the
* destination multicast address, and for IPv4, SHOULD add the "ttl"
* parameter with a value of 1. Usage of IPv6 multicast is not defined
* in this specification, and will be a subject of future
* standardization when the need arises.
*/
}
/*
* comp=sigcomp; sigcomp-id=
*/
return(true);
}