mirror of
https://github.com/tribes2/engine.git
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739 lines
15 KiB
C++
739 lines
15 KiB
C++
//-----------------------------------------------------------------------------
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// V12 Engine
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//
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// Copyright (c) 2001 GarageGames.Com
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// Portions Copyright (c) 2001 by Sierra Online, Inc.
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//-----------------------------------------------------------------------------
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <netdb.h>
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#include <errno.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <unistd.h>
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#include <fcntl.h>
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/* The ares library is a C API */
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extern "C" {
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#define class ares_class
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#include <ares.h>
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#undef class
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}
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#include "platformLinux/async.h"
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#include "platformLinux/platformLinux.h"
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#include "Platform/platform.h"
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#include "Platform/event.h"
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#include "console/console.h"
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#include "Platform/gameInterface.h"
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#include "Core/fileStream.h"
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//
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// Local types
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//
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typedef struct {
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int fd;
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U16 port;
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} NameLookup;
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//
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// Sundry module-local variables.
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//
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static ares_channel channel;
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static U16 defaultPort = 28000;
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static U16 netPort = 0;
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static NetSocket udpSocket = -1;
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//
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// Our asychronous callbacks.
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//
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static int selectCallback( int fd, int event, int status )
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{
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static ConnectedNotifyEvent notifyEvent;
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static ConnectedReceiveEvent receiveEvent;
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static ConnectedAcceptEvent acceptEvent;
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int bytesRead = 0;
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Net::Error error = Net::NoError;
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switch( event ) {
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case FD_READ:
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error = Net::recv( fd, receiveEvent.data, MaxPacketDataSize, &bytesRead );
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if( error == Net::NoError & bytesRead != 0 ) {
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receiveEvent.tag = fd;
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receiveEvent.size = ConnectedReceiveEventHeaderSize + bytesRead;
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Game->postEvent( receiveEvent );
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}
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break;
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case FD_CONNECT:
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notifyEvent.tag = fd;
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if( status ) {
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notifyEvent.state = ConnectedNotifyEvent::Connected;
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} else {
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notifyEvent.state = ConnectedNotifyEvent::ConnectFailed;
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}
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Game->postEvent( notifyEvent );
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break;
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case FD_CLOSE:
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for( ; ; ) {
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error = Net::recv( fd, receiveEvent.data, MaxPacketDataSize, &bytesRead );
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if( error != Net::NoError || bytesRead == 0 ) {
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break;
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}
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receiveEvent.tag = fd;
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receiveEvent.size = ConnectedReceiveEventHeaderSize + bytesRead;
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Game->postEvent( receiveEvent );
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}
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notifyEvent.tag = fd;
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notifyEvent.state = ConnectedNotifyEvent::Disconnected;
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Game->postEvent( notifyEvent );
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break;
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case FD_ACCEPT:
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acceptEvent.portTag = fd;
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acceptEvent.connectionTag = Net::accept( fd, &acceptEvent.address );
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if( acceptEvent.connectionTag != InvalidSocket ) {
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Net::setBlocking( acceptEvent.connectionTag, false );
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AsyncSelect( acceptEvent.connectionTag, selectCallback, FD_READ | FD_CONNECT | FD_CLOSE );
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Game->postEvent( acceptEvent );
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}
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break;
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}
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}
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static void lookupCallback( void* arg, int status, struct hostent* host )
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{
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static ConnectedNotifyEvent notifyEvent;
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char* errorMem = 0;
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char** addr = 0;
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NameLookup* lookup = static_cast<NameLookup*>( arg );
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if( status != ARES_SUCCESS ) {
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ares_strerror( status, &errorMem );
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Con::printf( "couldn't perform lookup: %s", errorMem );
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ares_free_errmem( errorMem );
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delete lookup;
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return;
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}
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struct sockaddr_in ipAddr;
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dMemcpy( &ipAddr.sin_addr.s_addr, host->h_addr_list[0], sizeof( struct in_addr ) );
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ipAddr.sin_port = lookup->port;
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ipAddr.sin_family = AF_INET;
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notifyEvent.tag = lookup->fd;
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int error = ::connect( lookup->fd, (struct sockaddr*) &ipAddr, sizeof( ipAddr ) );
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if( error == -1 && errno != EINPROGRESS ) {
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notifyEvent.state = ConnectedNotifyEvent::DNSFailed;
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::close( lookup->fd );
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} else {
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AsyncSelect( lookup->fd, selectCallback, FD_READ | FD_CONNECT | FD_CLOSE );
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notifyEvent.state = ConnectedNotifyEvent::DNSResolved;
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}
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Game->postEvent( notifyEvent );
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delete lookup;
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}
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//
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// Utilities.
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//
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static void netToIPSocketAddress( const NetAddress* addr, struct sockaddr_in* ip )
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{
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memset( ip, 0, sizeof( struct sockaddr_in ) );
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ip->sin_family = AF_INET;
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ip->sin_port = htons( addr->port );
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ip->sin_addr.s_addr = *( (U32*) addr->netNum );
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}
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static void IPSocketToNetAddress( const sockaddr_in* ip, NetAddress* addr )
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{
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addr->type = NetAddress::IPAddress;
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addr->port = htons( ip->sin_port );
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*( (U32*) addr->netNum ) = ip->sin_addr.s_addr;
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}
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static Net::Error getLastError( void )
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{
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// God knows what distinguishes Invalid from Wrong...
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switch( errno ) {
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case 0:
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return Net::NoError;
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case EBADF:
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case ENOTSOCK:
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return Net::NotASocket;
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case EAGAIN:
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return Net::WouldBlock;
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case ENOTCONN:
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return Net::InvalidPacketProtocol;
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case EOPNOTSUPP:
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return Net::WrongProtocolType;
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default:
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return Net::UnknownError;
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}
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}
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//
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// Net:: implementation
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//
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bool Net::init( void )
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{
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int status;
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char* errorMem;
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if( AsyncInit( ) == -1 ) {
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Con::printf( "AsyncInit failed" );
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return false;
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}
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status = ares_init( &channel );
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if( status != ARES_SUCCESS ) {
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Con::printf( "ares_init: %s", ares_strerror( status, &errorMem ) );
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ares_free_errmem( errorMem );
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return false;
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}
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return true;
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}
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void Net::shutdown( void )
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{
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AsyncShutdown( );
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ares_destroy( channel );
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closePort( );
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}
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NetSocket Net::openListenPort( U16 port )
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{
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if( Game->isJournalReading( ) ) {
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U32 ret;
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Game->journalRead( &ret );
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return ret;
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}
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NetSocket fd = openSocket( );
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bind( fd, port );
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listen( fd, 4 );
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setBlocking( fd, false );
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if( AsyncSelect( fd, selectCallback, FD_ACCEPT ) == -1 ) {
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Con::printf( "Error: %d", errno );
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}
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if( Game->isJournalWriting( ) ) {
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Game->journalWrite( fd );
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}
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return fd;
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}
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NetSocket Net::openConnectTo( const char* addressString )
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{
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if( !dStrnicmp( addressString, "ip:", 3 ) ) {
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addressString += 3;
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}
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char remoteAddr[256];
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dStrncpy( remoteAddr, addressString, 256 );
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char* portString = dStrchr( remoteAddr, ':' );
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U16 port;
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if( portString ) {
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*portString++ = 0;
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port = htons( dAtoi( portString ) );
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} else {
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port = htons( defaultPort );
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}
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if( !dStricmp( remoteAddr, "broadcast" ) ) {
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return InvalidSocket;
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}
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if( Game->isJournalReading( ) ) {
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U32 ret;
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Game->journalRead( &ret );
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return ret;
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}
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NetSocket fd = openSocket( );
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setBlocking( fd, false );
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struct sockaddr_in ipAddr;
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ipAddr.sin_addr.s_addr = inet_addr( remoteAddr );
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if( ipAddr.sin_addr.s_addr != INADDR_NONE ) {
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ipAddr.sin_port = port;
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ipAddr.sin_family = AF_INET;
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int error = ::connect( fd, (struct sockaddr*) &ipAddr, sizeof( ipAddr ) );
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if( error == -1 && errno != EINPROGRESS ) {
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Con::printf( "Last error: %d", errno );
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::close( fd );
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fd = InvalidSocket;
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}
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if( fd != InvalidSocket ) {
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AsyncSelect( fd, selectCallback, FD_READ | FD_CONNECT | FD_CLOSE );
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}
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} else {
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NameLookup* lookup = new NameLookup;
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lookup->fd = fd;
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lookup->port = port;
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ares_gethostbyname( channel, remoteAddr, AF_INET, lookupCallback, lookup );
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}
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if( Game->isJournalWriting( ) ) {
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Game->journalWrite( fd );
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}
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return fd;
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}
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void Net::closeConnectTo( NetSocket fd )
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{
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if( Game->isJournalReading( ) ) {
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return;
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}
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AsyncCancel( fd );
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::close( fd );
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}
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Net::Error Net::sendTo( NetSocket fd, const U8* buffer, int size )
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{
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if( Game->isJournalReading( ) ) {
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U32 error;
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Game->journalRead( &error );
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return static_cast<Net::Error>( error );
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}
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Net::Error error = send( fd, buffer, size );
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if( Game->isJournalWriting( ) ) {
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Game->journalWrite( static_cast<U32>( error ) );
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}
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return error;
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}
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bool Net::openPort( S32 port )
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{
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closePort( );
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udpSocket = socket( AF_INET, SOCK_DGRAM, 0 );
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if( udpSocket != -1 ) {
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Net::Error error;
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error = bind( udpSocket, port );
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if( error == NoError ) {
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error = setBufferSize( udpSocket, 32768 );
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}
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if( error == NoError ) {
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error = setBroadcast( udpSocket, true );
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}
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if( error == NoError ) {
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error = setBlocking( udpSocket, false );
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}
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if( error == NoError ) {
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Con::printf( "UDP initialized on port %d", port );
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} else {
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close( udpSocket );
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udpSocket = -1;
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Con::printf( "Unable to initialize UDP -- error %d", error );
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}
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}
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netPort = port;
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return ( udpSocket != -1 );
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}
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void Net::closePort( void )
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{
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if( udpSocket != -1 ) {
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close( udpSocket );
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}
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}
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Net::Error Net::sendto( const NetAddress* addr, const U8* buffer, S32 size )
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{
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if( Game->isJournalReading( ) ) {
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return NoError;
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}
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struct sockaddr_in ip;
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netToIPSocketAddress( addr, &ip );
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if( ::sendto( udpSocket, buffer, size, 0, (struct sockaddr*) &ip, sizeof( ip ) ) == -1 ) {
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return getLastError( );
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}
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return NoError;
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}
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void Net::process( void )
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{
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PacketReceiveEvent event;
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for( ; ; ) {
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struct sockaddr sa;
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socklen_t length = sizeof( sa );
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S32 bytes = -1;
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if( udpSocket != -1 ) {
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bytes = recvfrom( udpSocket, event.data, MaxPacketDataSize, 0, &sa, &length );
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}
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if( bytes == -1 ) {
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break;
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}
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if( sa.sa_family == AF_INET ) {
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IPSocketToNetAddress( (struct sockaddr_in*) &sa, &event.sourceAddress );
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} else {
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continue;
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}
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NetAddress& addr = event.sourceAddress;
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if( addr.type == NetAddress::IPAddress &&
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addr.netNum[0] == 127 && addr.netNum[1] == 0 &&
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addr.netNum[1] == 0 && addr.netNum[2] == 1 &&
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addr.port == netPort ) {
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continue;
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}
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if( bytes <= 0 ) {
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continue;
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}
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event.size = PacketReceiveEventHeaderSize + bytes;
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Game->postEvent( event );
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}
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// do ares DNS processing
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fd_set read_fds, write_fds;
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int nfds = 0;
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struct timeval* timeout = 0;
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struct timeval tv;
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struct timezone tz;
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FD_ZERO( &read_fds );
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FD_ZERO( &write_fds );
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nfds = ares_fds( channel, &read_fds, &write_fds );
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if( nfds == 0 ) {
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return;
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}
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timeout = ares_timeout( channel, 0, &tv );
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select( nfds, &read_fds, &write_fds, 0, timeout );
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ares_process( channel, &read_fds, &write_fds );
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}
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NetSocket Net::openSocket( void )
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{
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int fd;
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if( ( fd = socket( AF_INET, SOCK_STREAM, 0 ) ) == -1 ) {
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return InvalidSocket;
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}
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return fd;
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}
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Net::Error Net::closeSocket( NetSocket fd )
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{
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if( fd == InvalidSocket ) {
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return NotASocket;
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}
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if( close( fd ) ) {
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return getLastError( );
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}
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return NoError;
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}
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Net::Error Net::connect( NetSocket fd, const NetAddress* addr )
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{
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if( addr->type != NetAddress::IPAddress ) {
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return WrongProtocolType;
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}
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struct sockaddr_in addrIn;
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netToIPSocketAddress( addr, &addrIn );
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if( ::connect( fd, (struct sockaddr*) &addrIn, sizeof( addrIn ) ) ) {
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return getLastError( );
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}
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return NoError;
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}
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Net::Error Net::listen( NetSocket fd, S32 backlog )
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{
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if( ::listen( fd, backlog ) ) {
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return getLastError( );
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}
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return NoError;
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}
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NetSocket Net::accept( NetSocket fd, NetAddress* addr )
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{
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struct sockaddr_in ip;
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socklen_t length = sizeof( ip );
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int ret = ::accept( fd, (struct sockaddr*) &ip, &length );
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if( ret != -1 ) {
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IPSocketToNetAddress( &ip, addr );
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return ret;
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}
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return InvalidSocket;
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}
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Net::Error Net::bind( NetSocket fd, U16 port )
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{
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struct sockaddr_in ip;
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dMemset( &ip, 0, sizeof( ip ) );
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ip.sin_family = AF_INET;
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// It's entirely possible that there are two NIC cards.
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// We let the user specify which one the server runs on.
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// thanks to [TPG]P1aGu3 for the name
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const char* serverIP = Con::getVariable( "Host::BindAddress" );
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// serverIP is guaranteed to be non-0.
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AssertFatal( serverIP, "serverIP is NULL!" );
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if( serverIP[0] != '\0' ) {
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// we're not empty
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ip.sin_addr.s_addr = inet_addr( serverIP );
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if( ip.sin_addr.s_addr != INADDR_NONE ) {
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Con::printf( "Binding server port to %s", serverIP );
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} else {
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Con::warnf( ConsoleLogEntry::General,
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"inet_addr() failed for %s while binding!",
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serverIP );
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ip.sin_addr.s_addr = INADDR_ANY;
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}
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} else {
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Con::printf( "Binding server port to default IP" );
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ip.sin_addr.s_addr = INADDR_ANY;
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}
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ip.sin_port = htons( port );
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if( ::bind( fd, (struct sockaddr*) &ip, sizeof( ip ) ) ) {
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return getLastError( );
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}
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return NoError;
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}
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Net::Error Net::setBufferSize( NetSocket fd, S32 size )
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{
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if( setsockopt( fd, SOL_SOCKET, SO_RCVBUF, &size, sizeof( size ) ) ) {
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return getLastError( );
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}
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if( setsockopt( fd, SOL_SOCKET, SO_SNDBUF, &size, sizeof( size ) ) ) {
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return getLastError( );
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}
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return NoError;
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}
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Net::Error Net::setBroadcast( NetSocket fd, bool broadcast )
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{
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S32 bc = broadcast;
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if( setsockopt( fd, SOL_SOCKET, SO_BROADCAST, &bc, sizeof( bc ) ) ) {
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return getLastError( );
|
|
}
|
|
|
|
return NoError;
|
|
}
|
|
|
|
Net::Error Net::setBlocking( NetSocket fd, bool blocking )
|
|
{
|
|
int flags;
|
|
|
|
// Let's do it the Posix.1g way!
|
|
if( ( flags = fcntl( fd, F_GETFL, 0 ) ) < 0 ) {
|
|
return getLastError( );
|
|
}
|
|
|
|
if( blocking ) {
|
|
flags &= ~O_NONBLOCK;
|
|
} else {
|
|
flags |= O_NONBLOCK;
|
|
}
|
|
|
|
if( fcntl( fd, F_SETFL, flags ) < 0 ) {
|
|
return getLastError( );
|
|
}
|
|
|
|
return NoError;
|
|
}
|
|
|
|
Net::Error Net::send( NetSocket fd, const U8* buffer, S32 size )
|
|
{
|
|
|
|
if( ::send( fd, buffer, size, 0 ) == -1 ) {
|
|
return getLastError( );
|
|
}
|
|
|
|
return NoError;
|
|
}
|
|
|
|
Net::Error Net::recv( NetSocket fd, U8* buffer, S32 size, S32* read )
|
|
{
|
|
|
|
if( ( *read = ::recv( fd, buffer, size, 0 ) ) == -1 ) {
|
|
return getLastError( );
|
|
}
|
|
|
|
return NoError;
|
|
}
|
|
|
|
bool Net::compareAddresses( const NetAddress* a1, const NetAddress* a2 )
|
|
{
|
|
// cast our separated ipv4 into a 32-bit word for compare
|
|
bool sameType = ( a1->type == a2->type );
|
|
bool sameNum = ( *( (U32*) a1->netNum ) == *( (U32*) a2->netNum ) );
|
|
bool samePort = ( a1->port == a2->port );
|
|
return ( sameType && sameNum && samePort );
|
|
}
|
|
|
|
bool Net::stringToAddress( const char* addressString, NetAddress* address )
|
|
{
|
|
|
|
if( dStrnicmp( addressString, "ip:", 3 ) == 0 ) {
|
|
addressString += 3;
|
|
}
|
|
|
|
if( dStrnicmp( addressString, "ipx:", 4 ) == 0 ) {
|
|
// foo on IPX.
|
|
return false;
|
|
}
|
|
|
|
if( dStrlen( addressString ) > 255 ) {
|
|
return false;
|
|
}
|
|
|
|
struct sockaddr_in ipAddr;
|
|
char remoteAddr[256];
|
|
dStrcpy( remoteAddr, addressString );
|
|
char* portString = dStrchr( remoteAddr, ':' );
|
|
|
|
if( portString ) {
|
|
*portString++ = 0;
|
|
}
|
|
|
|
struct hostent* he = 0;
|
|
|
|
if( dStricmp( remoteAddr, "broadcast" ) == 0 ) {
|
|
ipAddr.sin_addr.s_addr = htonl( INADDR_BROADCAST );
|
|
} else {
|
|
ipAddr.sin_addr.s_addr = inet_addr( remoteAddr );
|
|
|
|
if( ipAddr.sin_addr.s_addr == INADDR_NONE ) {
|
|
|
|
if( ( he == gethostbyname( remoteAddr ) ) == NULL ) {
|
|
return false;
|
|
} else {
|
|
memcpy( &ipAddr.sin_addr.s_addr, he->h_addr, sizeof( struct in_addr ) );
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if( portString ) {
|
|
ipAddr.sin_port = htons( dAtoi( portString ) );
|
|
} else {
|
|
ipAddr.sin_port = htons( defaultPort );
|
|
}
|
|
|
|
ipAddr.sin_family = AF_INET;
|
|
IPSocketToNetAddress( &ipAddr, address );
|
|
return true;
|
|
}
|
|
|
|
void Net::addressToString( const NetAddress* address, char addressString[256] )
|
|
{
|
|
|
|
if( address->type == NetAddress::IPAddress ) {
|
|
struct sockaddr_in ipAddr;
|
|
|
|
netToIPSocketAddress( address, &ipAddr );
|
|
|
|
if( ipAddr.sin_addr.s_addr == htonl( INADDR_BROADCAST ) ) {
|
|
dSprintf( addressString, 256, "IP:Broadcast:%d", ntohs( ipAddr.sin_port ) );
|
|
} else {
|
|
dSprintf( addressString, 256, "IP:%d.%d.%d.%d:%d",
|
|
( ipAddr.sin_addr.s_addr ) & 0xff,
|
|
( ipAddr.sin_addr.s_addr >> 8 ) & 0xff,
|
|
( ipAddr.sin_addr.s_addr >> 16 ) & 0xff,
|
|
( ipAddr.sin_addr.s_addr >> 24 ) & 0xff,
|
|
ntohs( ipAddr.sin_port ) );
|
|
}
|
|
|
|
}
|
|
|
|
}
|