/// <summary> /// Used to create a SIP response for a request when it was not possible to parse the incoming SIP request. /// The response generated by this method may or may not make it back to the requester. Because the SIP /// request could not be parsed there are no Via headers available and without those the return network /// path is missing. Instead a new Via header is generated that may get through if the requester is only /// one SIP hop away. /// </summary> /// <param name="localSIPEndPoint">The local SIP end point the request was received on.</param> /// <param name="remoteSIPEndPoint">The remote SIP end point the request was received on.</param> /// <param name="responseCode">The response code to set on the response.</param> /// <param name="reasonPhrase">Optional reason phrase to set on the response (keep short).</param> public static SIPResponse GetResponse(SIPEndPoint localSIPEndPoint, SIPEndPoint remoteSIPEndPoint, SIPResponseStatusCodesEnum responseCode, string reasonPhrase) { try { SIPResponse response = new SIPResponse(responseCode, reasonPhrase); response.SetSendFromHints(localSIPEndPoint); SIPSchemesEnum sipScheme = (localSIPEndPoint.Protocol == SIPProtocolsEnum.tls) ? SIPSchemesEnum.sips : SIPSchemesEnum.sip; SIPFromHeader from = new SIPFromHeader(null, new SIPURI(sipScheme, localSIPEndPoint), null); SIPToHeader to = new SIPToHeader(null, new SIPURI(sipScheme, localSIPEndPoint), null); int cSeq = 1; string callId = CallProperties.CreateNewCallId(); response.Header = new SIPHeader(from, to, cSeq, callId); response.Header.CSeqMethod = SIPMethodsEnum.NONE; response.Header.Vias.PushViaHeader(new SIPViaHeader(new SIPEndPoint(localSIPEndPoint.Protocol, remoteSIPEndPoint.GetIPEndPoint()), CallProperties.CreateBranchId())); response.Header.MaxForwards = Int32.MinValue; response.Header.Allow = m_allowedSIPMethods; return(response); } catch (Exception excp) { logger.LogError("Exception SIPResponse.GetResponse. " + excp.Message); throw; } }
/// <summary> /// Builds a very basic SIP request. In most cases additional headers will need to be added in order for it to be useful. /// When this method is called the channel used for sending the request has not been decided. The headers below depend on /// the sending channel. By setting them to "0.0.0.0:0" the send request methods will substitute in the appropriate value /// at send time: /// - Top Via header. /// - From header. /// - Contact header. /// </summary> /// <param name="method">The method for the SIP request.</param> /// <param name="uri">The destination URI for the request.</param> /// <param name="to">The To header for the request.</param> /// <param name="from">The From header for the request.</param> /// <returns>A SIP request object.</returns> public static SIPRequest GetRequest(SIPMethodsEnum method, SIPURI uri, SIPToHeader to, SIPFromHeader from) { SIPRequest request = new SIPRequest(method, uri); SIPHeader header = new SIPHeader(from, to, 1, CallProperties.CreateNewCallId()); request.Header = header; header.CSeqMethod = method; header.Allow = m_allowedSIPMethods; header.Vias.PushViaHeader(SIPViaHeader.GetDefaultSIPViaHeader()); return(request); }
/// <summary> /// Helper method to create a SIP response for a SIP request. This method can be thought of as creating a /// vanilla (or no frills) response for a request. It's suitable for generating error responses. For requests that /// require an action such as creating a call or registering a contact the response will require additional /// information and this method will not be suitable. /// </summary> /// <param name="sipRequest">The SIP request to create the response for.</param> /// <param name="responseCode">The response code.</param> /// <param name="reasonPhrase">Optional reason phrase to set on the response (needs to be short).</param> /// <returns>A SIP response object.</returns> public static SIPResponse GetResponse(SIPRequest sipRequest, SIPResponseStatusCodesEnum responseCode, string reasonPhrase) { try { SIPResponse response = new SIPResponse(responseCode, reasonPhrase); response.SetSendFromHints(sipRequest.LocalSIPEndPoint); if (reasonPhrase != null) { response.ReasonPhrase = reasonPhrase; } SIPHeader requestHeader = sipRequest.Header; SIPFromHeader from = (requestHeader == null || requestHeader.From != null) ? requestHeader.From : new SIPFromHeader(null, new SIPURI(sipRequest.URI.Scheme, sipRequest.LocalSIPEndPoint), null); SIPToHeader to = (requestHeader == null || requestHeader.To != null) ? requestHeader.To : new SIPToHeader(null, new SIPURI(sipRequest.URI.Scheme, sipRequest.LocalSIPEndPoint), null); int cSeq = (requestHeader == null || requestHeader.CSeq != -1) ? requestHeader.CSeq : 1; string callId = (requestHeader == null || requestHeader.CallId != null) ? requestHeader.CallId : CallProperties.CreateNewCallId(); response.Header = new SIPHeader(from, to, cSeq, callId); response.Header.CSeqMethod = (requestHeader != null) ? requestHeader.CSeqMethod : SIPMethodsEnum.NONE; if (requestHeader == null || requestHeader.Vias == null || requestHeader.Vias.Length == 0) { response.Header.Vias.PushViaHeader(new SIPViaHeader(sipRequest.RemoteSIPEndPoint, CallProperties.CreateBranchId())); } else { response.Header.Vias = requestHeader.Vias; } response.Header.MaxForwards = Int32.MinValue; response.Header.Allow = m_allowedSIPMethods; return(response); } catch (Exception excp) { logger.LogError("Exception SIPResponse.GetResponse. " + excp.Message); throw excp; } }
private SIPRequest GetDummyINVITERequest(SIPURI dummyURI) { string dummyFrom = "<sip:[email protected]>"; string dummyContact = "sip:127.0.0.1:1234"; SIPRequest inviteRequest = new SIPRequest(SIPMethodsEnum.INVITE, dummyURI); SIPHeader inviteHeader = new SIPHeader(SIPFromHeader.ParseFromHeader(dummyFrom), new SIPToHeader(null, dummyURI, null), 1, CallProperties.CreateNewCallId()); inviteHeader.From.FromTag = CallProperties.CreateNewTag(); inviteHeader.Contact = SIPContactHeader.ParseContactHeader(dummyContact); inviteHeader.CSeqMethod = SIPMethodsEnum.INVITE; inviteHeader.UserAgent = "unittest"; inviteRequest.Header = inviteHeader; SIPViaHeader viaHeader = new SIPViaHeader("127.0.0.1", 1234, CallProperties.CreateBranchId(), SIPProtocolsEnum.udp); inviteRequest.Header.Vias.PushViaHeader(viaHeader); inviteRequest.Body = "dummy"; inviteRequest.Header.ContentLength = inviteRequest.Body.Length; inviteRequest.Header.ContentType = "application/sdp"; return(inviteRequest); }