mirror of
https://github.com/dashr9230/SA-MP.git
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601 lines
17 KiB
C++
601 lines
17 KiB
C++
/**
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* @file
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* @brief SocketLayer class implementation
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*
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* This file is part of RakNet Copyright 2003 Rakkarsoft LLC and Kevin Jenkins.
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*
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* Usage of Raknet is subject to the appropriate licence agreement.
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* "Shareware" Licensees with Rakkarsoft LLC are subject to the
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* shareware license found at
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* http://www.rakkarsoft.com/shareWareLicense.html which you agreed to
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* upon purchase of a "Shareware license" "Commercial" Licensees with
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* Rakkarsoft LLC are subject to the commercial license found at
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* http://www.rakkarsoft.com/sourceCodeLicense.html which you agreed
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* to upon purchase of a "Commercial license"
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* Custom license users are subject to the terms therein.
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* All other users are
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* subject to the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* Refer to the appropriate license agreement for distribution,
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* modification, and warranty rights.
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*/
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#include "SocketLayer.h"
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#include <assert.h>
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#include "MTUSize.h"
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#ifdef _WIN32
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#include <process.h>
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#define COMPATIBILITY_2_RECV_FROM_FLAGS 0
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typedef int socklen_t;
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#elif defined(_COMPATIBILITY_2)
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#include "Compatibility2Includes.h"
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#else
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#define COMPATIBILITY_2_RECV_FROM_FLAGS 0
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#include <string.h> // memcpy
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#include <unistd.h>
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#include <fcntl.h>
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#endif
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#include "ExtendedOverlappedPool.h"
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#ifdef __USE_IO_COMPLETION_PORTS
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#include "AsynchronousFileIO.h"
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#endif
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#ifdef _MSC_VER
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#pragma warning( push )
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#endif
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bool SocketLayer::socketLayerStarted = false;
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#ifdef _WIN32
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WSADATA SocketLayer::winsockInfo;
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#endif
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SocketLayer SocketLayer::I;
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#ifdef _WIN32
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extern void __stdcall ProcessNetworkPacket( const unsigned int binaryAddress, const unsigned short port, const char *data, const int length, RakPeer *rakPeer );
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#else
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extern void ProcessNetworkPacket( const unsigned int binaryAddress, const unsigned short port, const char *data, const int length, RakPeer *rakPeer );
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#endif
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#ifdef _WIN32
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extern void __stdcall ProcessPortUnreachable( const unsigned int binaryAddress, const unsigned short port, RakPeer *rakPeer );
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#else
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extern void ProcessPortUnreachable( const unsigned int binaryAddress, const unsigned short port, RakPeer *rakPeer );
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#endif
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#ifdef _DEBUG
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#include <stdio.h>
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#endif
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SocketLayer::SocketLayer()
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{
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if ( socketLayerStarted == false )
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{
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#ifdef _WIN32
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if ( WSAStartup( MAKEWORD( 2, 2 ), &winsockInfo ) != 0 )
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{
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#if defined(_WIN32) && !defined(_COMPATIBILITY_1) && defined(_DEBUG)
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DWORD dwIOError = GetLastError();
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LPVOID messageBuffer;
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FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
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NULL, dwIOError, MAKELANGID( LANG_NEUTRAL, SUBLANG_DEFAULT ), // Default language
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( LPTSTR ) & messageBuffer, 0, NULL );
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// something has gone wrong here...
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printf( "WSAStartup failed:Error code - %d\n%s", dwIOError, messageBuffer );
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//Free the buffer.
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LocalFree( messageBuffer );
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#endif
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}
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#endif
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socketLayerStarted = true;
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}
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}
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SocketLayer::~SocketLayer()
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{
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if ( socketLayerStarted == true )
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{
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#ifdef _WIN32
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WSACleanup();
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#endif
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socketLayerStarted = false;
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}
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}
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SOCKET SocketLayer::Connect( SOCKET writeSocket, unsigned int binaryAddress, unsigned short port )
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{
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assert( writeSocket != INVALID_SOCKET );
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sockaddr_in connectSocketAddress;
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connectSocketAddress.sin_family = AF_INET;
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connectSocketAddress.sin_port = htons( port );
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connectSocketAddress.sin_addr.s_addr = binaryAddress;
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if ( connect( writeSocket, ( struct sockaddr * ) & connectSocketAddress, sizeof( struct sockaddr ) ) != 0 )
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{
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#if defined(_WIN32) && !defined(_COMPATIBILITY_1) && defined(_DEBUG)
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DWORD dwIOError = GetLastError();
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LPVOID messageBuffer;
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FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
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NULL, dwIOError, MAKELANGID( LANG_NEUTRAL, SUBLANG_DEFAULT ), // Default language
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( LPTSTR ) &messageBuffer, 0, NULL );
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// something has gone wrong here...
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printf( "WSAConnect failed:Error code - %d\n%s", dwIOError, messageBuffer );
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//Free the buffer.
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LocalFree( messageBuffer );
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#endif
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}
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return writeSocket;
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}
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#ifdef _MSC_VER
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#pragma warning( disable : 4100 ) // warning C4100: <variable name> : unreferenced formal parameter
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#endif
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SOCKET SocketLayer::CreateBoundSocket( unsigned short port, bool blockingSocket, const char *forceHostAddress )
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{
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SOCKET listenSocket;
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sockaddr_in listenerSocketAddress;
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int ret;
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#ifdef __USE_IO_COMPLETION_PORTS
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if ( blockingSocket == false )
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listenSocket = WSASocket( AF_INET, SOCK_DGRAM, 0, NULL, 0, WSA_FLAG_OVERLAPPED );
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else
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#endif
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listenSocket = socket( AF_INET, SOCK_DGRAM, 0 );
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if ( listenSocket == INVALID_SOCKET )
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{
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#if defined(_WIN32) && !defined(_COMPATIBILITY_1) && defined(_DEBUG)
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DWORD dwIOError = GetLastError();
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LPVOID messageBuffer;
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FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
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NULL, dwIOError, MAKELANGID( LANG_NEUTRAL, SUBLANG_DEFAULT ), // Default language
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( LPTSTR ) & messageBuffer, 0, NULL );
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// something has gone wrong here...
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printf( "socket(...) failed:Error code - %d\n%s", dwIOError, messageBuffer );
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//Free the buffer.
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LocalFree( messageBuffer );
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#endif
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return INVALID_SOCKET;
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}
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int sock_opt = 1;
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if ( setsockopt( listenSocket, SOL_SOCKET, SO_REUSEADDR, ( char * ) & sock_opt, sizeof ( sock_opt ) ) == -1 )
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{
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#if defined(_WIN32) && !defined(_COMPATIBILITY_1) && defined(_DEBUG)
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DWORD dwIOError = GetLastError();
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LPVOID messageBuffer;
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FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
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NULL, dwIOError, MAKELANGID( LANG_NEUTRAL, SUBLANG_DEFAULT ), // Default language
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( LPTSTR ) & messageBuffer, 0, NULL );
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// something has gone wrong here...
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printf( "setsockopt(SO_REUSEADDR) failed:Error code - %d\n%s", dwIOError, messageBuffer );
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//Free the buffer.
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LocalFree( messageBuffer );
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#endif
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}
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// This doubles the max throughput rate
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sock_opt=1024*256;
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setsockopt(listenSocket, SOL_SOCKET, SO_RCVBUF, ( char * ) & sock_opt, sizeof ( sock_opt ) );
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// This doesn't make much difference: 10% maybe
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sock_opt=1024*16;
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setsockopt(listenSocket, SOL_SOCKET, SO_SNDBUF, ( char * ) & sock_opt, sizeof ( sock_opt ) );
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#if defined(_WIN32) && !defined(_COMPATIBILITY_1) && defined(_DEBUG)
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// If this assert hit you improperly linked against WSock32.h
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assert(IP_DONTFRAGMENT==14);
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#endif
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// TODO - I need someone on dialup to test this with :(
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// Path MTU Detection
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/*
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if ( setsockopt( listenSocket, IPPROTO_IP, IP_DONTFRAGMENT, ( char * ) & sock_opt, sizeof ( sock_opt ) ) == -1 )
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{
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#if defined(_WIN32) && !defined(_COMPATIBILITY_1) && defined(_DEBUG)
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DWORD dwIOError = GetLastError();
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LPVOID messageBuffer;
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FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
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NULL, dwIOError, MAKELANGID( LANG_NEUTRAL, SUBLANG_DEFAULT ), // Default language
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( LPTSTR ) & messageBuffer, 0, NULL );
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// something has gone wrong here...
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printf( "setsockopt(IP_DONTFRAGMENT) failed:Error code - %d\n%s", dwIOError, messageBuffer );
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//Free the buffer.
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LocalFree( messageBuffer );
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#endif
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}
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*/
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#ifndef _COMPATIBILITY_2
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//Set non-blocking
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#ifdef _WIN32
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unsigned long nonblocking = 1;
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// http://www.die.net/doc/linux/man/man7/ip.7.html
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if ( ioctlsocket( listenSocket, FIONBIO, &nonblocking ) != 0 )
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{
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assert( 0 );
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return INVALID_SOCKET;
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}
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#else
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if ( fcntl( listenSocket, F_SETFL, O_NONBLOCK ) != 0 )
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{
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assert( 0 );
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return INVALID_SOCKET;
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}
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#endif
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#endif
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// Set broadcast capable
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if ( setsockopt( listenSocket, SOL_SOCKET, SO_BROADCAST, ( char * ) & sock_opt, sizeof( sock_opt ) ) == -1 )
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{
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#if defined(_WIN32) && !defined(_COMPATIBILITY_1) && defined(_DEBUG)
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DWORD dwIOError = GetLastError();
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LPVOID messageBuffer;
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FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
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NULL, dwIOError, MAKELANGID( LANG_NEUTRAL, SUBLANG_DEFAULT ), // Default language
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( LPTSTR ) & messageBuffer, 0, NULL );
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// something has gone wrong here...
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printf( "setsockopt(SO_BROADCAST) failed:Error code - %d\n%s", dwIOError, messageBuffer );
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//Free the buffer.
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LocalFree( messageBuffer );
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#endif
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}
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// Listen on our designated Port#
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listenerSocketAddress.sin_port = htons( port );
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// Fill in the rest of the address structure
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listenerSocketAddress.sin_family = AF_INET;
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if (forceHostAddress && forceHostAddress[0])
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{
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listenerSocketAddress.sin_addr.s_addr = inet_addr( forceHostAddress );
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}
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else
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{
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listenerSocketAddress.sin_addr.s_addr = INADDR_ANY;
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}
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// bind our name to the socket
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ret = bind( listenSocket, ( struct sockaddr * ) & listenerSocketAddress, sizeof( struct sockaddr ) );
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if ( ret == SOCKET_ERROR )
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{
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#if defined(_WIN32) && !defined(_COMPATIBILITY_1) && defined(_DEBUG)
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DWORD dwIOError = GetLastError();
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LPVOID messageBuffer;
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FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
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NULL, dwIOError, MAKELANGID( LANG_NEUTRAL, SUBLANG_DEFAULT ), // Default language
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( LPTSTR ) & messageBuffer, 0, NULL );
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// something has gone wrong here...
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printf( "bind(...) failed:Error code - %d\n%s", dwIOError, messageBuffer );
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//Free the buffer.
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LocalFree( messageBuffer );
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#endif
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return INVALID_SOCKET;
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}
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return listenSocket;
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}
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#if !defined(_COMPATIBILITY_1) && !defined(_COMPATIBILITY_2)
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const char* SocketLayer::DomainNameToIP( const char *domainName )
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{
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struct hostent * phe = gethostbyname( domainName );
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if ( phe == 0 || phe->h_addr_list[ 0 ] == 0 )
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{
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//cerr << "Yow! Bad host lookup." << endl;
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return 0;
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}
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struct in_addr addr;
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memcpy( &addr, phe->h_addr_list[ 0 ], sizeof( struct in_addr ) );
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return inet_ntoa( addr );
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}
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#endif
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void SocketLayer::Write( const SOCKET writeSocket, const char* data, const int length )
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{
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#ifdef _DEBUG
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assert( writeSocket != INVALID_SOCKET );
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#endif
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#ifdef __USE_IO_COMPLETION_PORTS
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ExtendedOverlappedStruct* eos = ExtendedOverlappedPool::Instance()->GetPointer();
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memset( &( eos->overlapped ), 0, sizeof( OVERLAPPED ) );
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memcpy( eos->data, data, length );
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eos->length = length;
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//AsynchronousFileIO::Instance()->PostWriteCompletion(ccs);
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WriteAsynch( ( HANDLE ) writeSocket, eos );
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#else
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send( writeSocket, data, length, 0 );
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#endif
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}
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// Start an asynchronous read using the specified socket.
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#ifdef _MSC_VER
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#pragma warning( disable : 4100 ) // warning C4100: <variable name> : unreferenced formal parameter
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#endif
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bool SocketLayer::AssociateSocketWithCompletionPortAndRead( SOCKET readSocket, unsigned int binaryAddress, unsigned short port, RakPeer *rakPeer )
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{
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#ifdef __USE_IO_COMPLETION_PORTS
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assert( readSocket != INVALID_SOCKET );
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ClientContextStruct* ccs = new ClientContextStruct;
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ccs->handle = ( HANDLE ) readSocket;
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ExtendedOverlappedStruct* eos = ExtendedOverlappedPool::Instance()->GetPointer();
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memset( &( eos->overlapped ), 0, sizeof( OVERLAPPED ) );
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eos->binaryAddress = binaryAddress;
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eos->port = port;
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eos->rakPeer = rakPeer;
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eos->length = MAXIMUM_MTU_SIZE;
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bool b = AsynchronousFileIO::Instance()->AssociateSocketWithCompletionPort( readSocket, ( DWORD ) ccs );
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if ( !b )
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{
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ExtendedOverlappedPool::Instance()->ReleasePointer( eos );
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delete ccs;
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return false;
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}
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BOOL success = ReadAsynch( ( HANDLE ) readSocket, eos );
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if ( success == FALSE )
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return false;
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#endif
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return true;
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}
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int SocketLayer::RecvFrom( const SOCKET s, RakPeer *rakPeer, int *errorCode )
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{
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int len;
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char data[ MAXIMUM_MTU_SIZE ];
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sockaddr_in sa;
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const socklen_t len2 = sizeof( struct sockaddr_in );
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sa.sin_family = AF_INET;
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#ifdef _DEBUG
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data[ 0 ] = 0;
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len = 0;
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sa.sin_addr.s_addr = 0;
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#endif
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if ( s == INVALID_SOCKET )
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{
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*errorCode = SOCKET_ERROR;
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return SOCKET_ERROR;
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}
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len = recvfrom( s, data, MAXIMUM_MTU_SIZE, COMPATIBILITY_2_RECV_FROM_FLAGS, ( sockaddr* ) & sa, ( socklen_t* ) & len2 );
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// if (len>0)
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// printf("Got packet on port %i\n",ntohs(sa.sin_port));
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if ( len == 0 )
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{
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#ifdef _DEBUG
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printf( "Error: recvfrom returned 0 on a connectionless blocking call\non port %i. This is a bug with Zone Alarm. Please turn off Zone Alarm.\n", ntohs( sa.sin_port ) );
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assert( 0 );
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#endif
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*errorCode = SOCKET_ERROR;
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return SOCKET_ERROR;
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}
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if ( len != SOCKET_ERROR )
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{
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unsigned short portnum;
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portnum = ntohs( sa.sin_port );
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//strcpy(ip, inet_ntoa(sa.sin_addr));
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//if (strcmp(ip, "0.0.0.0")==0)
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// strcpy(ip, "127.0.0.1");
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ProcessNetworkPacket( sa.sin_addr.s_addr, portnum, data, len, rakPeer );
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return 1;
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}
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else
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{
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*errorCode = 0;
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#if defined(_WIN32) && !defined(_COMPATIBILITY_1) && defined(_DEBUG)
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DWORD dwIOError = WSAGetLastError();
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if ( dwIOError == WSAEWOULDBLOCK )
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{
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return SOCKET_ERROR;
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}
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if ( dwIOError == WSAECONNRESET )
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{
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#if defined(_DEBUG)
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// printf( "A previous send operation resulted in an ICMP Port Unreachable message.\n" );
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#endif
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unsigned short portnum=0;
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ProcessPortUnreachable(sa.sin_addr.s_addr, portnum, rakPeer);
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// *errorCode = dwIOError;
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return SOCKET_ERROR;
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}
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else
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{
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#if defined(_DEBUG)
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if ( dwIOError != WSAEINTR )
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{
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LPVOID messageBuffer;
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FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
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NULL, dwIOError, MAKELANGID( LANG_NEUTRAL, SUBLANG_DEFAULT ), // Default language
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( LPTSTR ) & messageBuffer, 0, NULL );
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// something has gone wrong here...
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printf( "recvfrom failed:Error code - %d\n%s", dwIOError, messageBuffer );
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//Free the buffer.
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LocalFree( messageBuffer );
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}
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#endif
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}
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#endif
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}
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return 0; // no data
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}
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#ifdef _MSC_VER
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#pragma warning( disable : 4702 ) // warning C4702: unreachable code
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#endif
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int SocketLayer::SendTo( SOCKET s, const char *data, int length, unsigned int binaryAddress, unsigned short port )
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{
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if ( s == INVALID_SOCKET )
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{
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return -1;
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}
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int len;
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sockaddr_in sa;
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sa.sin_port = htons( port );
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sa.sin_addr.s_addr = binaryAddress;
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sa.sin_family = AF_INET;
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do
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{
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// TODO - use WSASendTo which is faster.
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len = sendto( s, data, length, 0, ( const sockaddr* ) & sa, sizeof( struct sockaddr_in ) );
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}
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while ( len == 0 );
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if ( len != SOCKET_ERROR )
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return 0;
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#if defined(_WIN32)
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DWORD dwIOError = WSAGetLastError();
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if ( dwIOError == WSAECONNRESET )
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{
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#if defined(_DEBUG)
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printf( "A previous send operation resulted in an ICMP Port Unreachable message.\n" );
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#endif
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|
|
}
|
|
else if ( dwIOError != WSAEWOULDBLOCK )
|
|
{
|
|
#if defined(_WIN32) && !defined(_COMPATIBILITY_1) && defined(_DEBUG)
|
|
LPVOID messageBuffer;
|
|
FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
|
|
NULL, dwIOError, MAKELANGID( LANG_NEUTRAL, SUBLANG_DEFAULT ), // Default language
|
|
( LPTSTR ) & messageBuffer, 0, NULL );
|
|
// something has gone wrong here...
|
|
printf( "sendto failed:Error code - %d\n%s", dwIOError, messageBuffer );
|
|
|
|
//Free the buffer.
|
|
LocalFree( messageBuffer );
|
|
#endif
|
|
|
|
}
|
|
|
|
return dwIOError;
|
|
#endif
|
|
|
|
return 1; // error
|
|
}
|
|
|
|
int SocketLayer::SendTo( SOCKET s, const char *data, int length, char ip[ 16 ], unsigned short port )
|
|
{
|
|
unsigned int binaryAddress;
|
|
binaryAddress = inet_addr( ip );
|
|
return SendTo( s, data, length, binaryAddress, port );
|
|
}
|
|
|
|
#if !defined(_COMPATIBILITY_1) && !defined(_COMPATIBILITY_2)
|
|
void SocketLayer::GetMyIP( char ipList[ 10 ][ 16 ] )
|
|
{
|
|
char ac[ 80 ];
|
|
|
|
if ( gethostname( ac, sizeof( ac ) ) == SOCKET_ERROR )
|
|
{
|
|
#if defined(_WIN32) && !defined(_COMPATIBILITY_1) && defined(_DEBUG)
|
|
DWORD dwIOError = GetLastError();
|
|
LPVOID messageBuffer;
|
|
FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
|
|
NULL, dwIOError, MAKELANGID( LANG_NEUTRAL, SUBLANG_DEFAULT ), // Default language
|
|
( LPTSTR ) & messageBuffer, 0, NULL );
|
|
// something has gone wrong here...
|
|
printf( "gethostname failed:Error code - %d\n%s", dwIOError, messageBuffer );
|
|
//Free the buffer.
|
|
LocalFree( messageBuffer );
|
|
#endif
|
|
|
|
return ;
|
|
}
|
|
|
|
struct hostent *phe = gethostbyname( ac );
|
|
|
|
if ( phe == 0 )
|
|
{
|
|
#if defined(_WIN32) && !defined(_COMPATIBILITY_1) && defined(_DEBUG)
|
|
DWORD dwIOError = GetLastError();
|
|
LPVOID messageBuffer;
|
|
FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
|
|
NULL, dwIOError, MAKELANGID( LANG_NEUTRAL, SUBLANG_DEFAULT ), // Default language
|
|
( LPTSTR ) & messageBuffer, 0, NULL );
|
|
// something has gone wrong here...
|
|
printf( "gethostbyname failed:Error code - %d\n%s", dwIOError, messageBuffer );
|
|
|
|
//Free the buffer.
|
|
LocalFree( messageBuffer );
|
|
#endif
|
|
|
|
return ;
|
|
}
|
|
|
|
for ( int i = 0; phe->h_addr_list[ i ] != 0 && i < 10; ++i )
|
|
{
|
|
|
|
struct in_addr addr;
|
|
|
|
memcpy( &addr, phe->h_addr_list[ i ], sizeof( struct in_addr ) );
|
|
//cout << "Address " << i << ": " << inet_ntoa(addr) << endl;
|
|
strcpy( ipList[ i ], inet_ntoa( addr ) );
|
|
}
|
|
}
|
|
#endif
|
|
|
|
unsigned short SocketLayer::GetLocalPort ( SOCKET s )
|
|
{
|
|
sockaddr_in sa;
|
|
socklen_t len = sizeof(sa);
|
|
if (getsockname(s, (sockaddr*)&sa, &len)!=0)
|
|
return 0;
|
|
return ntohs(sa.sin_port);
|
|
}
|
|
|
|
|
|
#ifdef _MSC_VER
|
|
#pragma warning( pop )
|
|
#endif
|