mirror of
https://port.numenaute.org/aleajactaest/khanat-opennel-code.git
synced 2024-09-22 04:30:35 +00:00
649 lines
16 KiB
C++
649 lines
16 KiB
C++
// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
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// Copyright (C) 2010 Winch Gate Property Limited
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "stdnet.h"
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#include "nel/net/sock.h"
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#include "nel/net/net_log.h"
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#include "nel/misc/time_nl.h"
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#include "nel/misc/hierarchical_timer.h"
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#ifdef NL_OS_WINDOWS
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# define NOMINMAX
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# include <winsock2.h>
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# include <windows.h>
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# define socklen_t int
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# define ERROR_NUM WSAGetLastError()
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# define ERROR_WOULDBLOCK WSAEWOULDBLOCK
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#elif defined NL_OS_UNIX
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# include <unistd.h>
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# include <sys/types.h>
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# include <sys/time.h>
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# include <sys/socket.h>
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# include <sys/ioctl.h>
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# include <netinet/in.h>
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# include <netinet/tcp.h>
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# include <arpa/inet.h>
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# include <netdb.h>
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# include <fcntl.h>
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# include <cerrno>
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# define SOCKET_ERROR -1
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# define INVALID_SOCKET -1
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# define ERROR_NUM errno
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# define ERROR_WOULDBLOCK EWOULDBLOCK
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# define ERROR_MSG strerror(errno)
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// BSD compatible constant
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# ifndef FNDELAY
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# define FNDELAY O_NDELAY
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# endif
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typedef int SOCKET;
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#endif
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using namespace std;
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using namespace NLMISC;
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namespace NLNET {
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bool CSock::_Initialized = false;
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/*
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* ESocket constructor
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*/
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ESocket::ESocket( const char *reason, bool systemerror, CInetAddress *addr )
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{
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/*it doesnt work on linux, should do something more cool
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std::stringstream ss;
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ss << "Socket error: " << reason;
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if ( systemerror )
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{
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ss << " (" << ERROR_NUM;
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#ifdef NL_OS_UNIX
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ss << ": " << ERROR_MSG;
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#endif
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ss << ") " << std::endl;
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}
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_Reason = ss.str();
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*/
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_Reason = "Socket error: ";
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uint errornum = CSock::getLastError();
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char str[256];
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if ( addr != NULL )
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{
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// Version with address
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smprintf( str, 256, reason, addr->asString().c_str() ); // reason *must* contain "%s"
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_Reason += str;
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}
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else
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{
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// Version without address
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_Reason += reason;
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}
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if ( systemerror )
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{
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_Reason += " (";
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smprintf( str, 256, "%d", errornum );
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_Reason += str;
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if ( errornum != 0 )
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{
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_Reason += ": ";
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_Reason += CSock::errorString( errornum );
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}
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_Reason += ")";
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}
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LNETL0_INFO( "LNETL0: Exception will be launched: %s", _Reason.c_str() );
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}
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/*
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* Initializes the network engine if it is not already done (under Windows, calls WSAStartup()).
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*/
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void CSock::initNetwork()
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{
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if ( ! CSock::_Initialized )
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{
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#ifdef NL_OS_WINDOWS
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WORD winsock_version = MAKEWORD( 2, 0 );
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WSADATA wsaData;
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if ( WSAStartup( winsock_version, &wsaData ) != 0 )
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{
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throw ESocket( "Winsock initialization failed" );
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}
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#endif
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CSock::_Initialized = true;
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}
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}
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/*
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* Releases the network engine
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*/
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void CSock::releaseNetwork()
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{
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#ifdef NL_OS_WINDOWS
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WSACleanup();
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#endif
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CSock::_Initialized = false;
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}
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/* Returns the code of the last error that has occured.
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* Note: This code is platform-dependant. On Unix, it is errno; on Windows it is the Winsock error code.
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* See also errorString()
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*/
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uint CSock::getLastError()
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{
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return (uint)ERROR_NUM;
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}
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/*
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* Returns a string explaining the network error (see getLastError())
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*/
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std::string CSock::errorString( uint errorcode )
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{
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#ifdef NL_OS_WINDOWS
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switch( errorcode )
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{
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case WSAEINTR /*10004*/: return "Blocking operation interrupted";
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case WSAEINVAL /*10022*/: return "Invalid socket (maybe not bound) or argument";
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case WSAEMFILE /*10024*/: return "Too many open sockets";
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case WSAENOTSOCK /*10038*/: return "Socket operation on nonsocket (maybe invalid select descriptor)";
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case WSAEMSGSIZE /*10040*/: return "Message too long";
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case WSAEADDRINUSE /*10048*/: return "Address already in use (is this service already running in this computer?)";
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case WSAEADDRNOTAVAIL/*10049*/: return "Address not available";
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case WSAENETDOWN /*10050*/: return "Network is down";
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case WSAENETUNREACH /*10051*/: return "Network is unreachable";
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case WSAECONNRESET /*10054*/: return "Connection reset by peer";
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case WSAENOBUFS /*10055*/: return "No buffer space available; please close applications or reboot";
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case WSAESHUTDOWN /*10058*/: return "Cannot send/receive after socket shutdown";
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case WSAETIMEDOUT /*10060*/: return "Connection timed-out";
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case WSAECONNREFUSED /*10061*/: return "Connection refused, the server may be offline";
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case WSAEHOSTUNREACH /*10065*/: return "Remote host is unreachable";
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case WSANOTINITIALISED /*093*/: return "'Windows Sockets' not initialized";
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default: return "";
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}
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#elif defined NL_OS_UNIX
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return std::string( strerror( errorcode ) );
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#endif
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}
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/*
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* Constructor
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*/
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CSock::CSock( bool logging ) :
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_Sock( INVALID_SOCKET ),
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_Logging( logging ),
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_NonBlocking( false ),
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_BytesReceived( 0 ),
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_BytesSent( 0 ),
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_TimeoutS( 0 ),
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_TimeoutUs( 0 ),
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_MaxReceiveTime( 0 ),
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_MaxSendTime( 0 ),
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_Blocking( false )
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{
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nlassert( CSock::_Initialized );
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/*{
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CSynchronized<bool>::CAccessor sync( &_SyncConnected );
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sync.value() = false;
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}*/
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_Connected = false;
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}
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/*
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* Construct a CSock object using an existing connected socket descriptor and its associated remote address
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*/
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CSock::CSock( SOCKET sock, const CInetAddress& remoteaddr ) :
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_Sock( sock ),
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_RemoteAddr( remoteaddr ),
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_Logging( true ),
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_NonBlocking( false ),
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_BytesReceived( 0 ),
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_BytesSent( 0 ),
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_MaxReceiveTime( 0 ),
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_MaxSendTime( 0 )
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{
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nlassert( CSock::_Initialized );
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/*{
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CSynchronized<bool>::CAccessor sync( &_SyncConnected );
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sync.value() = true;
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}*/
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_Connected = true;
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// Check remote address
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if ( ! _RemoteAddr.isValid() )
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{
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throw ESocket( "Could not init a socket object with an invalid address", false );
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}
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// Get local socket name
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setLocalAddress();
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#ifdef NL_OS_UNIX
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// We set the close-on-exec flag on the socket to be sure that when
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// we call the exec() to spawn an application in the AES for example,
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// that the AES listen socket will be close and not given to the child.
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// From google:
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// Manipulate the close-on-exec flag to determine if a file descriptor
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// should be closed as part of the normal processing of the exec subroutine.
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// If the flag is set, the file descriptor is closed.
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// If the flag is clear, the file descriptor is left open
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ioctl(_Sock, FIOCLEX, NULL);
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// fcntl should be more portable but not tested fcntl(_Sock, F_SETFD, FD_CLOEXEC);
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#endif
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}
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/*
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* Creates the socket and get a valid descriptor
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*/
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void CSock::createSocket( int type, int protocol )
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{
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nlassert( _Sock == INVALID_SOCKET );
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_Sock = (SOCKET)socket( AF_INET, type, protocol ); // or IPPROTO_IP (=0) ?
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if ( _Sock == INVALID_SOCKET )
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{
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throw ESocket( "Socket creation failed" );
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}
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if ( _Logging )
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{
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// LNETL0_DEBUG( "LNETL0: Socket %d open (TCP)", _Sock );
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}
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#ifdef NL_OS_UNIX
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// We set the close-on-exec flag on the socket to be sure that when
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// we call the exec() to spawn an application in the AES for example,
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// that the AES listen socket will be close and not given the to child.
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// From google:
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// Manipulate the close-on-exec flag to determine if a file descriptor
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// should be closed as part of the normal processing of the exec subroutine.
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// If the flag is set, the file descriptor is closed.
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// If the flag is clear, the file descriptor is left open
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ioctl(_Sock, FIOCLEX, NULL);
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// fcntl should be more portable but not tested fcntl(_Sock, F_SETFD, FD_CLOEXEC);
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#endif
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}
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/*
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* Closes the listening socket
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*/
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void CSock::close()
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{
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if ( _Logging )
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{
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LNETL0_DEBUG( "LNETL0: Socket %d closing for %s at %s", _Sock, _RemoteAddr.asString().c_str(), _LocalAddr.asString().c_str() );
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}
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SOCKET sockToClose = _Sock;
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// preset to invalid to bypass exception in listen thread
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_Sock = INVALID_SOCKET;
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#ifdef NL_OS_WINDOWS
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closesocket( sockToClose );
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#elif defined NL_OS_UNIX
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::close( sockToClose );
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#endif
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_Connected = false;
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}
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/*
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* Destructor
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*/
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CSock::~CSock()
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{
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//nlinfo( "Report for %s socket %s: Max send time: %u Max recv time: %u", _NonBlocking?"non-blocking":"blocking", remoteAddr().asString().c_str(), _MaxSendTime, _MaxReceiveTime );
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//nlinfo( "Max send time: %u", _MaxSendTime);
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if ( _Sock != INVALID_SOCKET )
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{
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if ( _Logging )
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{
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LNETL0_DEBUG( "LNETL0: Socket %d closing for %s at %s", _Sock, _RemoteAddr.asString().c_str(), _LocalAddr.asString().c_str() );
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}
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if ( connected() )
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{
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#ifdef NL_OS_WINDOWS
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shutdown( _Sock, SD_BOTH );
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}
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closesocket( _Sock );
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#elif defined NL_OS_UNIX
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shutdown( _Sock, SHUT_RDWR );
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}
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::close( _Sock );
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#endif
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_Sock = INVALID_SOCKET;
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}
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}
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/*
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* Connection
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*/
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void CSock::connect( const CInetAddress& addr )
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{
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LNETL0_DEBUG( "LNETL0: Socket %d connecting to %s...", _Sock, addr.asString().c_str() );
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// Check address
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if ( ! addr.isValid() )
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{
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throw ESocket( "Unable to connect to invalid address", false );
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}
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#ifndef NL_OS_WINDOWS
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// Set Reuse Address On (does not work on Win98 and is useless on Win2000)
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int value = true;
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if ( setsockopt( _Sock, SOL_SOCKET, SO_REUSEADDR, &value, sizeof(value) ) == SOCKET_ERROR )
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{
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throw ESocket( "ReuseAddr failed" );
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}
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#endif
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// Connection (when _Sock is a datagram socket, connect establishes a default destination address)
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if ( ::connect( _Sock, (const sockaddr *)(addr.sockAddr()), sizeof(sockaddr_in) ) != 0 )
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{
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/* if ( _Logging )
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{
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#ifdef NL_OS_WINDOWS
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nldebug( "Impossible to connect socket %d to %s %s (%d)", _Sock, addr.hostName().c_str(), addr.asIPString().c_str(), ERROR_NUM );
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#elif defined NL_OS_UNIX
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nldebug( "Impossible to connect socket %d to %s %s (%d:%s)", _Sock, addr.hostName().c_str(), addr.asIPString().c_str(), ERROR_NUM, strerror(ERROR_NUM) );
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#endif
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}
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*/
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throw ESocketConnectionFailed( addr );
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}
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setLocalAddress();
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if ( _Logging )
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{
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LNETL0_DEBUG( "LNETL0: Socket %d connected to %s (local %s)", _Sock, addr.asString().c_str(), _LocalAddr.asString().c_str() );
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}
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_RemoteAddr = addr;
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_BytesReceived = 0;
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_BytesSent = 0;
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/*CSynchronized<bool>::CAccessor sync( &_SyncConnected );
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sync.value() = true;*/
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_Connected = true;
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}
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/*
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* Checks if there is some data to receive
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*/
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bool CSock::dataAvailable()
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{
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fd_set fdset;
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FD_ZERO( &fdset );
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FD_SET( _Sock, &fdset );
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timeval tv;
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tv.tv_sec = _TimeoutS;
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tv.tv_usec = _TimeoutUs;
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// Test for message received.
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int res = select( _Sock+1, &fdset, NULL, NULL, &tv );
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switch ( res )
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{
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case 0 : return false;
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case -1 : throw ESocket( "CSock::dataAvailable(): select failed" );
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default : return true;
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}
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}
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/*
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* Sets the local address
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*/
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void CSock::setLocalAddress()
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{
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sockaddr saddr;
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socklen_t saddrlen = sizeof(saddr);
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if ( getsockname( _Sock, &saddr, &saddrlen ) != 0 )
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{
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throw ESocket( "Unable to find local address" );
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}
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_LocalAddr.setSockAddr( (const sockaddr_in *)&saddr );
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}
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/*
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* Sends data, or returns false if it would block
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*/
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CSock::TSockResult CSock::send( const uint8 *buffer, uint32& len, bool throw_exception )
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{
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TTicks before = CTime::getPerformanceTime();
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len = ::send( _Sock, (const char*)buffer, len, 0 );
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_MaxSendTime = max( (uint32)(CTime::ticksToSecond(CTime::getPerformanceTime()-before)*1000.0f), _MaxSendTime );
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// nldebug ("CSock::send(): Sent %d bytes to %d (%d)", len, _Sock, ERROR_NUM);
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if ( _Logging )
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{
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// LNETL0_DEBUG ("LNETL0: CSock::send(): Sent %d bytes to %d res: %d (%d)", realLen, _Sock, len, ERROR_NUM);
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}
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if ( ((int)len) == SOCKET_ERROR )
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{
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if ( ERROR_NUM == ERROR_WOULDBLOCK )
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{
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H_AUTO(L0SendWouldBlock);
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len = 0;
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//nlSleep(10);
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if (!_Blocking)
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{
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//nldebug("SendWouldBlock - %s / %s Entering snooze mode",_LocalAddr.asString().c_str(),_RemoteAddr.asString().c_str());
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_Blocking= true;
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}
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return Ok;
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}
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if ( throw_exception )
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{
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#ifdef NL_OS_WINDOWS
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throw ESocket( NLMISC::toString( "Unable to send data: error %u", GetLastError() ).c_str() );
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#else
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throw ESocket( "Unable to send data" );
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#endif
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}
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return Error;
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}
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_BytesSent += len;
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if (_Blocking)
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{
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//nldebug("SendWouldBlock - %s / %s Leaving snooze mode",_LocalAddr.asString().c_str(),_RemoteAddr.asString().c_str());
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_Blocking= false;
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}
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return Ok;
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}
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/*
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* Receives data
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*/
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CSock::TSockResult CSock::receive( uint8 *buffer, uint32& len, bool throw_exception )
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{
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if ( _NonBlocking )
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{
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// Receive incoming message (only the received part)
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TTicks before = CTime::getPerformanceTime();
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len = ::recv( _Sock, (char*)buffer, len, 0 );
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//nlinfo ("CSock::receive(): NBM Received %d bytes to %d res: %d (%d)", realLen, _Sock, len, ERROR_NUM);
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if ( _Logging )
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{
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// LNETL0_DEBUG ("LNETL0: CSock::receive(): NBM Received %d bytes to %d res: %d (%d)", realLen, _Sock, len, ERROR_NUM);
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}
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_MaxReceiveTime = max( (uint32)(CTime::ticksToSecond(CTime::getPerformanceTime()-before)*1000.0f), _MaxReceiveTime );
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switch ( len )
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{
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// Graceful disconnection
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case 0 :
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{
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/*{
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CSynchronized<bool>::CAccessor sync( &_SyncConnected );
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sync.value() = false;
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}*/
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_Connected = false;
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if ( throw_exception )
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{
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throw ESocketConnectionClosed();
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}
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return CSock::ConnectionClosed;
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}
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// Socket error or call would block
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case SOCKET_ERROR :
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{
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len = 0;
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if ( ERROR_NUM == ERROR_WOULDBLOCK )
|
|
{
|
|
// Call would block
|
|
return CSock::WouldBlock;
|
|
}
|
|
else
|
|
{
|
|
// Socket error
|
|
if ( throw_exception )
|
|
{
|
|
throw ESocket( "Unable to receive data" );
|
|
}
|
|
return CSock::Error;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else // Blocking Mode
|
|
{
|
|
// Receive incoming message, waiting until a complete message has arrived
|
|
uint total = 0;
|
|
uint brecvd;
|
|
|
|
while ( total < len )
|
|
{
|
|
TTicks before = CTime::getPerformanceTime();
|
|
brecvd = ::recv( _Sock, (char*)(buffer+total), len-total, 0 );
|
|
|
|
// nlinfo ("CSock::receive(): BM Received %d bytes to %d res: %d (%d) total %d", len, _Sock, brecvd, ERROR_NUM, total);
|
|
|
|
_MaxReceiveTime = max( (uint32)(CTime::ticksToSecond(CTime::getPerformanceTime()-before)*1000.0f), _MaxReceiveTime );
|
|
|
|
switch ( brecvd )
|
|
{
|
|
// Graceful disconnection
|
|
case 0 :
|
|
{
|
|
/*{
|
|
CSynchronized<bool>::CAccessor sync( &_SyncConnected );
|
|
sync.value() = false;
|
|
}*/
|
|
_Connected = false;
|
|
len = total;
|
|
_BytesReceived += len;
|
|
|
|
if ( throw_exception )
|
|
{
|
|
throw ESocketConnectionClosed();
|
|
}
|
|
return CSock::ConnectionClosed;
|
|
}
|
|
|
|
// Socket error
|
|
case SOCKET_ERROR :
|
|
{
|
|
len = total;
|
|
_BytesReceived += len;
|
|
|
|
if ( throw_exception )
|
|
{
|
|
throw ESocket( "Unable to receive data" );
|
|
}
|
|
return CSock::Error;
|
|
}
|
|
}
|
|
total += brecvd;
|
|
}
|
|
}
|
|
|
|
/*if ( _Logging )
|
|
{
|
|
LNETL0_DEBUG( "LNETL0: Socket %d received %d bytes", _Sock, len );
|
|
}*/
|
|
_BytesReceived += len;
|
|
return CSock::Ok;
|
|
}
|
|
|
|
|
|
/*
|
|
* Sets the socket in nonblocking mode
|
|
*/
|
|
void CSock::setNonBlockingMode ( bool bm )
|
|
{
|
|
if ( _NonBlocking != bm )
|
|
{
|
|
#ifdef NL_OS_WINDOWS
|
|
u_long b = bm;
|
|
if ( ioctlsocket( _Sock, FIONBIO, &b ) != 0 )
|
|
#else
|
|
if ( fcntl( _Sock, F_SETFL, FNDELAY | fcntl( _Sock, F_GETFL, 0 ) ) == -1 )
|
|
#endif
|
|
{
|
|
throw ESocket( "Cannot set nonblocking mode" );
|
|
}
|
|
_NonBlocking = bm;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Sets the send buffer size
|
|
*/
|
|
void CSock::setSendBufferSize( sint32 size )
|
|
{
|
|
setsockopt( _Sock, SOL_SOCKET, SO_SNDBUF, (char*)(&size), (socklen_t)sizeof(size) );
|
|
}
|
|
|
|
/*
|
|
* Gets the send buffer size
|
|
*/
|
|
sint32 CSock::getSendBufferSize()
|
|
{
|
|
int size = -1;
|
|
socklen_t bufsize;
|
|
getsockopt( _Sock, SOL_SOCKET, SO_SNDBUF, (char*)(&size), &bufsize );
|
|
return size;
|
|
}
|
|
|
|
} // NLNET
|