使用SIP-Sorcery订阅响应C＃

Question

我正尝试在C＃SIP客户端项目中使用来自codeplex的sip巫术来发送和接收请求并响应我的服务器。当我使用SIPUDPChannel.Send（'remoteEP'，'msg'）时，我可以看到SUBSCRIBE数据包被发送到我的服务器，并且我的服务器以状态响应回应。

但是，我如何使用SIP Sorcery API捕获响应/请求事件？

Answer 1

回答第二个问题，你已经在第二个问题中发表了关于为什么第二个SUBSCRIBE请求在对话框中（或更正确的事务中）的内容;不是。

但是，因为您正在重新使用您从第一个SUBSCRIBE请求的响应中获得的SIP标头，所以您最终将设置某些标头，使其看起来好像它是现有事务的一部分。

正确的做法是从您的原始SIP请求中重新使用标头，然后递增CSeq并重新生成CallID。下面的代码行（注意我没有编译它来检查语法错误）。

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：

您如下图所示的代码添加凭据SIP请求。请注意，验证标头是基于每个请求而不是每个传输或每个信道的基础。在sipsorcery代码中，SIPTransport可以具有多个SIPChannel，并且SIPChannel可以与多个SIP端点通信，因此在传输或通道上设置凭据没有任何意义。

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：

要发送到SIP请求的响应简单最简单的方法如下所示。

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