SipServer.hpp_old

/****************************************************************************
*   Copyright (C) 2009 by Joshua weaver									*
*   joshuaweaver@gmail.com													*
*																			*
*   All rights reserved.													*
*																			*
*   Redistribution and use in source and binary forms, with or without		*
*	modification, are permitted provided that the following conditions are 	*
*	met:																	*
*		* Redistributions of source code must retain the above copyright 	*
*		  notice, this list of conditions and the following disclaimer.		*
*		* Redistributions in binary form must reproduce the above copyright	*
*		  notice, this list of conditions and the following disclaimer in 	*
*		  the documentation and/or other materials provided with the 		*
*		  distribution.														*
*     * Neither the name of the <ORGANIZATION> nor the names of its 		*
*		 contributors may be used to endorse or promote products derived 	*
*		 from this software without specific prior written permission.		*
*																			*
*	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS		*
*	"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT		*
*	LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR	*
*	A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 	*
*	OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 	*
*	SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 		*
*	LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 	*
*	DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	*
*	THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 	*
*	(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	*
*	OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	*
***************************************************************************/

#ifndef SIPSERVER_H
#define SIPSERVER_H

#include <string>
#include <exception>
#include <netinet/in.h>
#include <netdb.h>
#include <unistd.h>
#include <string>
#include <arpa/inet.h>
#include <memory>
#include <string.h> //strcasecmp

using namespace std;


namespace Sip
{


//
// Utility functions
//

string RandomString( int length );

//
// Exception Classes
//

/**
* \class SipServerException
* \brief standard exception class for SipServer
*/
class SipServerException : public exception
{
	public:
		SipServerException ( std::string what, std::string message ) throw()
			: m_s ( what ), m_m( message) {}
		~SipServerException () throw() {}

		virtual const char * what() const throw()  { return m_s.c_str(); }

		string originalMessage() throw() { return m_m; }

	private:

		string m_s, m_m;

};

/**
 * \class SipServerException
 * \brief standard exception class for SipServer
 */
class SipServerTimeout : public exception
{
	public:
		SipServerTimeout ( std::string what ) throw()
	: m_s ( what ) {}
		~SipServerTimeout () throw() {}

		virtual const char * what() const throw()  { return m_s.c_str(); }

	private:

		string m_s;

};

/**
* \class SipProtocolException
* \brief standard exception class for SipProtocol
*/
class SipProtocolException : public std::exception
{
	public:
		SipProtocolException ( std::string code, std::string description ) throw()
				: m_code ( code ), m_desc ( description ) {};
		~SipProtocolException () throw() {}

		std::string code() throw() { return m_code; }
		virtual const char * what() const throw() { return m_desc.c_str(); }

	private:

		std::string m_code;
		std::string m_desc;

};

/**
* \class SipServer
* \brief Creates a class capable of translating raw SIP requests, UDP @ port 5060, to easily parseable data types. Also allows communication outwards to SIP UAS/UAC's
*/
class SipServer
{
	public:
		SipServer( int UDPPort = DEFAULT_UDP_LISTENPORT ) throw ( SipServerException );

		/**
		 *     Waits for a SIP datagram.
		 * @return The address the SipMessage was received from
		 * @param sipMessage An auto_ptr to a sip message. This will be re-assigned to the SipMessage received
		 * @todo Forward requests not meant for this-host
		 */
		string Accept( auto_ptr<SipMessage>& sipMessage );

		/**
		 * \brief Sends a sip response. Will decrement max-forwards field.
		 * \param response The response to send
		 * \throw SipServerException if errors processing message, or max-forwards is 0
		 */
		void Respond( SipResponse& response ) const;

		/**
		 * \brief Sends a sip request. Will decrement max-forwards field.
		 * \param request The response to send
		 * \throw SipServerException if errors processing message, or max-forwards is 0
		 */
		void Request( SipRequest& request ) const;

		int UDPPort() const throw();

	private:

		int 		m_sock;
		int		m_udpPort;
		sockaddr_in	m_serverAddr;

};


class SipUtility
{
	public:
		/** 
		* @brief Reads the socket and calls ParseMessage on the contents.
		* 
		* @param sipMessage An auto_ptr<SipMessage> you would like to contain the SipMessage
		* @param socket berkeley socket to read from
		* 
		* @return The IP address of the client.
		*/
		static string GetMessage( auto_ptr<SipMessage>& sipMessage, int socket );

		/**
		 * \brief Sends a sip response. Will decrement max-forwards field.
		 * \param response The response to send
		 * \throw SipServerException if errors processing message, or max-forwards is 0
		 */
		static void Respond( SipResponse& response );
		
		/**
		 * \brief Sends a sip request. Will decrement max-forwards field.
		 * \param request The response to send
		 * \throw SipServerException if errors processing message, or max-forwards is 0
		 */
		static void Request( SipRequest& request );
	private:
		static void SendSipMessage( const string& rawMessage, const URI& recipient );
		
		/**
		 * \brief Decrements the max-forwards header.
		 * \param mesg The SipMessage to operate on.
		 * \throw If max-forwards <= 0
		 */
		static void DecrementForwards( SipMessage& mesg );
};


} //namespace Sip
#endif