示例#1
0
        /// <summary>
        /// Checks if SIP response has all required values as response line,header fields and their values.
        /// Throws Exception if not valid SIP response.
        /// </summary>
        public void Validate()
        {
            // Via: + branch prameter
            // To:
            // From:
            // CallID:
            // CSeq

            if (Via.GetTopMostValue() == null)
            {
                throw new SIP_ParseException("Via: header field is missing !");
            }
            if (Via.GetTopMostValue().Branch == null)
            {
                throw new SIP_ParseException("Via: header fields branch parameter is missing !");
            }

            if (To == null)
            {
                throw new SIP_ParseException("To: header field is missing !");
            }

            if (From == null)
            {
                throw new SIP_ParseException("From: header field is missing !");
            }

            if (CallID == null)
            {
                throw new SIP_ParseException("CallID: header field is missing !");
            }

            if (CSeq == null)
            {
                throw new SIP_ParseException("CSeq: header field is missing !");
            }

            // TODO: INVITE 2xx must have only 1 contact header with SIP or SIPS.
        }
示例#2
0
        /// <summary>
        /// Checks if SIP request has all required values as request line,header fields and their values.
        /// Throws Exception if not valid SIP request.
        /// </summary>
        public void Validate()
        {
            // Request SIP version
            // Via: + branch prameter
            // To:
            // From:
            // CallID:
            // CSeq
            // Max-Forwards RFC 3261 8.1.1.

            if (!RequestLine.Version.ToUpper().StartsWith("SIP/2.0"))
            {
                throw new SIP_ParseException("Not supported SIP version '" + RequestLine.Version + "' !");
            }

            if (Via.GetTopMostValue() == null)
            {
                throw new SIP_ParseException("Via: header field is missing !");
            }
            if (Via.GetTopMostValue().Branch == null)
            {
                throw new SIP_ParseException("Via: header field branch parameter is missing !");
            }

            if (To == null)
            {
                throw new SIP_ParseException("To: header field is missing !");
            }

            if (From == null)
            {
                throw new SIP_ParseException("From: header field is missing !");
            }

            if (CallID == null)
            {
                throw new SIP_ParseException("CallID: header field is missing !");
            }

            if (CSeq == null)
            {
                throw new SIP_ParseException("CSeq: header field is missing !");
            }

            if (MaxForwards == -1)
            {
                // We can fix it by setting it to default value 70.
                MaxForwards = 70;
            }

            /* RFC 3261 12.1.2
             *  When a UAC sends a request that can establish a dialog (such as an INVITE) it MUST
             *  provide a SIP or SIPS URI with global scope (i.e., the same SIP URI can be used in
             *  messages outside this dialog) in the Contact header field of the request. If the
             *  request has a Request-URI or a topmost Route header field value with a SIPS URI, the
             *  Contact header field MUST contain a SIPS URI.
             */
            if (SIP_Utils.MethodCanEstablishDialog(RequestLine.Method))
            {
                if (Contact.GetAllValues().Length == 0)
                {
                    throw new SIP_ParseException(
                              "Contact: header field is missing, method that can establish a dialog MUST provide a SIP or SIPS URI !");
                }
                if (Contact.GetAllValues().Length > 1)
                {
                    throw new SIP_ParseException(
                              "There may be only 1 Contact: header for the method that can establish a dialog !");
                }
                if (!Contact.GetTopMostValue().Address.IsSipOrSipsUri)
                {
                    throw new SIP_ParseException(
                              "Method that can establish a dialog MUST have SIP or SIPS uri in Contact: header !");
                }
            }

            // TODO: Invite must have From:/To: tag

            // TODO: Check that request-Method equals CSeq method

            // TODO: PRACK must have RAck and RSeq header fields.

            // TODO: get in transport made request, so check if sips and sip set as needed.
        }