tomwalters@570: /*
tomwalters@570: 	oscpack -- Open Sound Control packet manipulation library
tomwalters@570: 	http://www.audiomulch.com/~rossb/oscpack
tomwalters@570: 
tomwalters@570: 	Copyright (c) 2004-2005 Ross Bencina <rossb@audiomulch.com>
tomwalters@570: 
tomwalters@570: 	Permission is hereby granted, free of charge, to any person obtaining
tomwalters@570: 	a copy of this software and associated documentation files
tomwalters@570: 	(the "Software"), to deal in the Software without restriction,
tomwalters@570: 	including without limitation the rights to use, copy, modify, merge,
tomwalters@570: 	publish, distribute, sublicense, and/or sell copies of the Software,
tomwalters@570: 	and to permit persons to whom the Software is furnished to do so,
tomwalters@570: 	subject to the following conditions:
tomwalters@570: 
tomwalters@570: 	The above copyright notice and this permission notice shall be
tomwalters@570: 	included in all copies or substantial portions of the Software.
tomwalters@570: 
tomwalters@570: 	Any person wishing to distribute modifications to the Software is
tomwalters@570: 	requested to send the modifications to the original developer so that
tomwalters@570: 	they can be incorporated into the canonical version.
tomwalters@570: 
tomwalters@570: 	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
tomwalters@570: 	EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
tomwalters@570: 	MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
tomwalters@570: 	IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
tomwalters@570: 	ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
tomwalters@570: 	CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
tomwalters@570: 	WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
tomwalters@570: */
tomwalters@570: #include "ip/NetworkingUtils.h"
tomwalters@570: 
tomwalters@570: #include <winsock2.h>   // this must come first to prevent errors with MSVC7
tomwalters@570: #include <windows.h>
tomwalters@570: #include <stdlib.h>
tomwalters@570: #include <stdio.h>
tomwalters@570: 
tomwalters@570: 
tomwalters@570: static LONG initCount_ = 0;
tomwalters@570: static bool winsockInitialized_ = false;
tomwalters@570: 
tomwalters@570: NetworkInitializer::NetworkInitializer()
tomwalters@570: {
tomwalters@570:     if( InterlockedIncrement( &initCount_ ) == 1 ){
tomwalters@570:         // there is a race condition here if one thread tries to access
tomwalters@570:         // the library while another is still initializing it. 
tomwalters@570:         // i can't think of an easy way to fix it so i'm telling you here
tomwalters@570:         // incase you need to init the library from two threads at once.
tomwalters@570:         // this is why the header file advises to instantiate one of these 
tomwalters@570:         // in main() so that the initialization happens globally
tomwalters@570: 
tomwalters@570:         // initialize winsock
tomwalters@570: 	    WSAData wsaData;
tomwalters@570: 	    int nCode = WSAStartup(MAKEWORD(1, 1), &wsaData);
tomwalters@570: 	    if( nCode != 0 ){
tomwalters@570: 	        //std::cout << "WSAStartup() failed with error code " << nCode << "\n";
tomwalters@570:         }else{
tomwalters@570:             winsockInitialized_ = true;
tomwalters@570:         }
tomwalters@570:     }
tomwalters@570: }
tomwalters@570: 
tomwalters@570: 
tomwalters@570: NetworkInitializer::~NetworkInitializer()
tomwalters@570: {
tomwalters@570:     if( InterlockedDecrement( &initCount_ ) == 0 ){
tomwalters@570:         if( winsockInitialized_ ){
tomwalters@570:             WSACleanup();
tomwalters@570:             winsockInitialized_ = false;
tomwalters@570:         }
tomwalters@570:     }
tomwalters@570: }
tomwalters@570: 
tomwalters@570: 
tomwalters@570: unsigned long GetHostByName( const char *name )
tomwalters@570: {
tomwalters@570:     NetworkInitializer networkInitializer;
tomwalters@570: 
tomwalters@570:     unsigned long result = 0;
tomwalters@570: 
tomwalters@570:     struct hostent *h = gethostbyname( name );
tomwalters@570:     if( h ){
tomwalters@570:         struct in_addr a;
tomwalters@570:         memcpy( &a, h->h_addr_list[0], h->h_length );
tomwalters@570:         result = ntohl(a.s_addr);
tomwalters@570:     }
tomwalters@570: 
tomwalters@570:     return result;
tomwalters@570: }