rob@76: /*
rob@76: 	oscpack -- Open Sound Control (OSC) packet manipulation library
rob@76:     http://www.rossbencina.com/code/oscpack
rob@76: 
rob@76:     Copyright (c) 2004-2013 Ross Bencina <rossb@audiomulch.com>
rob@76: 
rob@76: 	Permission is hereby granted, free of charge, to any person obtaining
rob@76: 	a copy of this software and associated documentation files
rob@76: 	(the "Software"), to deal in the Software without restriction,
rob@76: 	including without limitation the rights to use, copy, modify, merge,
rob@76: 	publish, distribute, sublicense, and/or sell copies of the Software,
rob@76: 	and to permit persons to whom the Software is furnished to do so,
rob@76: 	subject to the following conditions:
rob@76: 
rob@76: 	The above copyright notice and this permission notice shall be
rob@76: 	included in all copies or substantial portions of the Software.
rob@76: 
rob@76: 	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
rob@76: 	EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
rob@76: 	MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
rob@76: 	IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
rob@76: 	ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
rob@76: 	CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
rob@76: 	WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
rob@76: */
rob@76: 
rob@76: /*
rob@76: 	The text above constitutes the entire oscpack license; however, 
rob@76: 	the oscpack developer(s) also make the following non-binding requests:
rob@76: 
rob@76: 	Any person wishing to distribute modifications to the Software is
rob@76: 	requested to send the modifications to the original developer so that
rob@76: 	they can be incorporated into the canonical version. It is also 
rob@76: 	requested that these non-binding requests be included whenever the
rob@76: 	above license is reproduced.
rob@76: */
rob@76: #include "ip/NetworkingUtils.h"
rob@76: 
rob@76: #include <winsock2.h>   // this must come first to prevent errors with MSVC7
rob@76: #include <windows.h>
rob@76: 
rob@76: #include <cstring>
rob@76: 
rob@76: 
rob@76: static LONG initCount_ = 0;
rob@76: static bool winsockInitialized_ = false;
rob@76: 
rob@76: NetworkInitializer::NetworkInitializer()
rob@76: {
rob@76:     if( InterlockedIncrement( &initCount_ ) == 1 ){
rob@76:         // there is a race condition here if one thread tries to access
rob@76:         // the library while another is still initializing it. 
rob@76:         // i can't think of an easy way to fix it so i'm telling you here
rob@76:         // incase you need to init the library from two threads at once.
rob@76:         // this is why the header file advises to instantiate one of these 
rob@76:         // in main() so that the initialization happens globally
rob@76: 
rob@76:         // initialize winsock
rob@76: 	    WSAData wsaData;
rob@76: 	    int nCode = WSAStartup(MAKEWORD(1, 1), &wsaData);
rob@76: 	    if( nCode != 0 ){
rob@76: 	        //std::cout << "WSAStartup() failed with error code " << nCode << "\n";
rob@76:         }else{
rob@76:             winsockInitialized_ = true;
rob@76:         }
rob@76:     }
rob@76: }
rob@76: 
rob@76: 
rob@76: NetworkInitializer::~NetworkInitializer()
rob@76: {
rob@76:     if( InterlockedDecrement( &initCount_ ) == 0 ){
rob@76:         if( winsockInitialized_ ){
rob@76:             WSACleanup();
rob@76:             winsockInitialized_ = false;
rob@76:         }
rob@76:     }
rob@76: }
rob@76: 
rob@76: 
rob@76: unsigned long GetHostByName( const char *name )
rob@76: {
rob@76:     NetworkInitializer networkInitializer;
rob@76: 
rob@76:     unsigned long result = 0;
rob@76: 
rob@76:     struct hostent *h = gethostbyname( name );
rob@76:     if( h ){
rob@76:         struct in_addr a;
rob@76:         std::memcpy( &a, h->h_addr_list[0], h->h_length );
rob@76:         result = ntohl(a.s_addr);
rob@76:     }
rob@76: 
rob@76:     return result;
rob@76: }