public static SIPMessage ParseSIPMessage(string message, SIPEndPoint localSIPEndPoint, SIPEndPoint remoteSIPEndPoint)
{
try
{
SIPMessage sipMessage = new SIPMessage();
sipMessage.LocalSIPEndPoint = localSIPEndPoint;
sipMessage.RemoteSIPEndPoint = remoteSIPEndPoint;
sipMessage.RawMessage = message;
int endFistLinePosn = message.IndexOf(m_CRLF);
if (endFistLinePosn != -1)
{
sipMessage.FirstLine = message.Substring(0, endFistLinePosn);
if (sipMessage.FirstLine.Substring(0, 3) == SIP_RESPONSE_PREFIX)
{
sipMessage.SIPMessageType = SIPMessageTypesEnum.Response;
}
else
{
sipMessage.SIPMessageType = SIPMessageTypesEnum.Request;
}
int endHeaderPosn = message.IndexOf(m_CRLF + m_CRLF);
if (endHeaderPosn == -1)
{
// Assume flakey implementation if message does not contain the required CRLFCRLF sequence and treat the message as having no body.
string headerString = message.Substring(endFistLinePosn + 2, message.Length - endFistLinePosn - 2);
sipMessage.SIPHeaders = SIPHeader.SplitHeaders(headerString); //Regex.Split(headerString, m_CRLF);
}
else
{
string headerString = message.Substring(endFistLinePosn + 2, endHeaderPosn - endFistLinePosn - 2);
sipMessage.SIPHeaders = SIPHeader.SplitHeaders(headerString); //Regex.Split(headerString, m_CRLF);
if (message.Length > endHeaderPosn + 4)
{
sipMessage.Body = message.Substring(endHeaderPosn + 4);
}
}
return(sipMessage);
}
else
{
logger.Warn("Error ParseSIPMessage, there were no end of line characters in the string being parsed.");
return(null);
}
}
catch (Exception excp)
{
logger.Error("Exception ParseSIPMessage. " + excp.Message + "\nSIP Message=" + message + ".");
return(null);
}
}
public SIPEndPoint LocalSIPEndPoint; // The local SIP socket the message was received on or sent from.
public static SIPMessage ParseSIPMessage(byte[] buffer, SIPEndPoint localSIPEndPoint, SIPEndPoint remoteSIPEndPoint)
{
string message = null;
try
{
if (buffer == null || buffer.Length < m_minFirstLineLength)
{
// Ignore.
return(null);
}
else if (buffer.Length > SIPConstants.SIP_MAXIMUM_RECEIVE_LENGTH)
{
throw new ApplicationException("SIP message received that exceeded the maximum allowed message length, ignoring.");
}
else if (!ByteBufferInfo.HasString(buffer, 0, buffer.Length, SIP_MESSAGE_IDENTIFIER, m_CRLF))
{
// Message does not contain "SIP" anywhere on the first line, ignore.
return(null);
}
else
{
message = Encoding.UTF8.GetString(buffer, 0, buffer.Length);
SIPMessage sipMessage = ParseSIPMessage(message, localSIPEndPoint, remoteSIPEndPoint);
if (sipMessage != null)
{
sipMessage.RawBuffer = buffer;
return(sipMessage);
}
else
{
return(null);
}
}
}
catch (Exception excp)
{
message = message.Replace("\n", "LF");
message = message.Replace("\r", "CR");
logger.Error("Exception ParseSIPMessage. " + excp.Message + "\nSIP Message=" + message + ".");
return(null);
}
}
