使用SIP-Sorcery訂閱響應C＃

Question

我正嘗試在C＃SIP客戶端項目中使用來自codeplex的sip巫術來發送和接收請求並響應我的服務器。當我使用SIPUDPChannel.Send（'remoteEP'，'msg'）時，我可以看到SUBSCRIBE數據包被髮送到我的服務器，並且我的服務器以狀態響應迴應。

但是，我如何使用SIP Sorcery API捕獲響應/請求事件？

Answer 1

回答第二個問題，你已經在第二個問題中發表了關於爲什麼第二個SUBSCRIBE請求在對話框中（或更正確的事務中）的內容;不是。

但是，因爲您正在重新使用您從第一個SUBSCRIBE請求的響應中獲得的SIP標頭，所以您最終將設置某些標頭，使其看起來好像它是現有事務的一部分。

正確的做法是從您的原始SIP請求中重新使用標頭，然後遞增CSeq並重新生成CallID。下面的代碼行（注意我沒有編譯它來檢查語法錯誤）。

static SIPTransport Transport; 
    static SIPMessage msg; 
    static string inputMsg; 
    static SIPUDPChannel channel; 
    static SIPRequest subscribeRequest; 

    static void Main(string[] args) 
    { 
     InitializeSIP(); 
     Console.Read(); 
    } 

    static void InitializeSIP() 
    { 
     //ResolveIPEndPoint 
     SIPEndPoint sipep = new SIPEndPoint(new IPEndPoint(IPAddress.Parse("192.168.102.12"), 5060)); 
     IPEndPoint remoteEP = new IPEndPoint(IPAddress.Parse("192.168.102.12"), 5060); 

     //Set Transport 
     Transport = new SIPTransport(SIPDNSManager.ResolveSIPService, new SIPTransactionEngine()); 

     //IPEndPoint 
     IPEndPoint localEndPoint = new IPEndPoint(IPAddress.Parse("192.168.100.10"), 8080); 

     //Create Channel object 
     channel = new SIPUDPChannel(localEndPoint); 
     Transport.AddSIPChannel(channel); 

     //Wire transport with incoming requests 
     Transport.SIPTransportRequestReceived += new SIPTransportRequestDelegate(Transport_SIPTransportRequestReceived); 

     //Wire transport with incoming responses 
     Transport.SIPTransportResponseReceived += new SIPTransportResponseDelegate(Transport_SIPTransportResponseReceived); 

     inputMsg = "SUBSCRIBE sip:myUSer@192.168.102.12 SIP/2.0" + SIPConstants.CRLF + 
     "Via: SIP/2.0/UDP 192.168.100.10:8080;rport;branch=z9hG4bKFBB7EAC06934405182D13950BD51F001" + SIPConstants.CRLF + 
     "From: <sip:subscribeUser@192.168.102.12>;tag=196468136" + SIPConstants.CRLF + 
     "To: <sip:myUser@192.168.102.12>" + SIPConstants.CRLF + 
     "Contact: <sip:subscribeUser@>" + SIPConstants.CRLF + 
     "Call-ID: 1337505490-453410046-705466123" + SIPConstants.CRLF + 
     "CSeq: 1 SUBSCRIBE" + SIPConstants.CRLF + 
     "Max-Forwards: 70" + SIPConstants.CRLF + 
     "Event: Presence" + SIPConstants.CRLF + 
     "Content-Length: 0"; 

     subscribeRequest = SIPRequest.ParseSIPRequest(inputMsg); 

     channel.Send(remoteEP, subscribeRequest.ToString()); 
    } 

    static void Transport_SIPTransportResponseReceived(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPResponse sipResponse) 
    { 
     Console.WriteLine("Response method: " + sipResponse.Header.CSeqMethod); 
     if(sipResponse.StatusCode == 401 && sipResponse.Header.CSeqMethod == SIPMethodsEnum.SUBSCRIBE) 
     { 
          //Resubscribe with Digist 
      //SIP Header 
      SIPHeader header = subscribeRequest.Header; 
      header.CSeq++; 
      header.CallID = "some_new_callID"; 
      header.AuthenticationHeader = sipResponse.Header.AuthenticationHeader; 
      header.Expires = 120; 

      //New Request 
      SIPRequest request = new SIPRequest(SIPMethodsEnum.SUBSCRIBE, new SIPURI(SIPSchemesEnum.sip, remoteEndPoint)); 
      request.LocalSIPEndPoint = localSIPEndPoint; 
      request.RemoteSIPEndPoint = remoteEndPoint; 
      request.Header = header; 

      //Send request 
      channel.Send(remoteEndPoint.GetIPEndPoint(), request.ToString()); 
     } 
     else 
      Console.WriteLine(string.Format("Error {0} {1}.", sipResponse.StatusCode, sipResponse.Status)); 
    } 

    static void Transport_SIPTransportRequestReceived(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPRequest sipRequest) 
    { 
     Console.WriteLine("Request body: " + sipRequest.Body); 
    } 

更新：

您如下圖所示的代碼添加憑據SIP請求。請注意，驗證標頭是基於每個請求而不是每個傳輸或每個信道的基礎。在sipsorcery代碼中，SIPTransport可以具有多個SIPChannel，並且SIPChannel可以與多個SIP端點通信，因此在傳輸或通道上設置憑據沒有任何意義。

SIPAuthorisationDigest authDigest = sipResponse.Header.AuthenticationHeader.SIPDigest; 
authDigest.SetCredentials(username, password, uri, SIPMethodsEnum.INVITE.ToString()); 
authRequest.Header.AuthenticationHeader = new SIPAuthenticationHeader(authDigest); 
authRequest.Header.AuthenticationHeader.SIPDigest.Response = authDigest.Digest; 

更新2：

要發送到SIP請求的響應簡單最簡單的方法如下所示。

static void Transport_SIPTransportRequestReceived(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteEndPoint, SIPRequest sipRequest) 
{ 
    SIPResponse response = SIPTransport.GetResponse(sipRequest, SIPResponseStatusCodesEnum.Ok, null); 
    _sipTransport.SendResponse(response); 
}