/* =========================================================================== Copyright (C) 1999-2005 Id Software, Inc. This file is part of Quake III Arena source code. Quake III Arena source code is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. Quake III Arena source code is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Quake III Arena source code; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA =========================================================================== */ #include "../qcommon/q_shared.h" #include "../qcommon/qcommon.h" #ifdef _WIN32 #include typedef int socklen_t; #define EAGAIN WSAEWOULDBLOCK #define EADDRNOTAVAIL WSAEADDRNOTAVAIL #define EAFNOSUPPORT WSAEAFNOSUPPORT #define ECONNRESET WSAECONNRESET #define socketError WSAGetLastError() static WSADATA winsockdata; #else #if MAC_OS_X_VERSION_MIN_REQUIRED == 1020 #define _BSD_SOCKLEN_T_ // needed for socklen_t on OSX 10.2 #endif #include #include #include #include #include #include #include #include #ifdef MACOS_X #include #include #include #include // for 'struct sockaddr_dl' #endif #ifdef __sun #include #endif typedef int SOCKET; static const SOCKET INVALID_SOCKET = -1; #define SOCKET_ERROR -1 #define closesocket close #define ioctlsocket ioctl #define socketError errno #endif static qboolean usingSocks = qfalse; static qboolean networkingEnabled = qfalse; static cvar_t* net_noudp; static cvar_t* net_socksEnabled; static cvar_t* net_socksServer; static cvar_t* net_socksPort; static cvar_t* net_socksUsername; static cvar_t* net_socksPassword; static struct sockaddr socksRelayAddr; static SOCKET ip_socket = INVALID_SOCKET; static SOCKET socks_socket = INVALID_SOCKET; #define MAX_IPS 16 static int numIP; static byte localIP[MAX_IPS][4]; /////////////////////////////////////////////////////////////// static const char* NET_ErrorString() { #ifdef _WIN32 //FIXME: replace with FormatMessage? #define WSA_ERR2STR(x) case x: return #x; switch ( socketError ) { WSA_ERR2STR( WSAEINTR ); WSA_ERR2STR( WSAEBADF ); WSA_ERR2STR( WSAEACCES ); WSA_ERR2STR( WSAEDISCON ); WSA_ERR2STR( WSAEFAULT ); WSA_ERR2STR( WSAEINVAL ); WSA_ERR2STR( WSAEMFILE ); WSA_ERR2STR( WSAEWOULDBLOCK ); WSA_ERR2STR( WSAEINPROGRESS ); WSA_ERR2STR( WSAEALREADY ); WSA_ERR2STR( WSAENOTSOCK ); WSA_ERR2STR( WSAEDESTADDRREQ ); WSA_ERR2STR( WSAEMSGSIZE ); WSA_ERR2STR( WSAEPROTOTYPE ); WSA_ERR2STR( WSAENOPROTOOPT ); WSA_ERR2STR( WSAEPROTONOSUPPORT ); WSA_ERR2STR( WSAESOCKTNOSUPPORT ); WSA_ERR2STR( WSAEOPNOTSUPP ); WSA_ERR2STR( WSAEPFNOSUPPORT ); WSA_ERR2STR( WSAEAFNOSUPPORT ); WSA_ERR2STR( WSAEADDRINUSE ); WSA_ERR2STR( WSAEADDRNOTAVAIL ); WSA_ERR2STR( WSAENETDOWN ); WSA_ERR2STR( WSAENETUNREACH ); WSA_ERR2STR( WSAENETRESET ); WSA_ERR2STR( WSAECONNABORTED ); WSA_ERR2STR( WSAECONNRESET ); WSA_ERR2STR( WSAENOBUFS ); WSA_ERR2STR( WSAEISCONN ); WSA_ERR2STR( WSAENOTCONN ); WSA_ERR2STR( WSAESHUTDOWN ); WSA_ERR2STR( WSAETOOMANYREFS ); WSA_ERR2STR( WSAETIMEDOUT ); WSA_ERR2STR( WSAECONNREFUSED ); WSA_ERR2STR( WSAELOOP ); WSA_ERR2STR( WSAENAMETOOLONG ); WSA_ERR2STR( WSAEHOSTDOWN ); WSA_ERR2STR( WSASYSNOTREADY ); WSA_ERR2STR( WSAVERNOTSUPPORTED ); WSA_ERR2STR( WSANOTINITIALISED ); WSA_ERR2STR( WSAHOST_NOT_FOUND ); WSA_ERR2STR( WSATRY_AGAIN ); WSA_ERR2STR( WSANO_RECOVERY ); WSA_ERR2STR( WSANO_DATA ); default: return "UNKNOWN ERROR"; } #undef WSA_ERR2STR #else return strerror( errno ); #endif } static void NetadrToSockadr( const netadr_t* a, struct sockaddr* s ) { memset( s, 0, sizeof(*s) ); if( a->type == NA_BROADCAST ) { ((struct sockaddr_in *)s)->sin_family = AF_INET; ((struct sockaddr_in *)s)->sin_port = a->port; ((struct sockaddr_in *)s)->sin_addr.s_addr = INADDR_BROADCAST; } else if( a->type == NA_IP ) { ((struct sockaddr_in *)s)->sin_family = AF_INET; ((struct sockaddr_in *)s)->sin_addr.s_addr = *(int *)&a->ip; ((struct sockaddr_in *)s)->sin_port = a->port; } } static void SockadrToNetadr( const struct sockaddr* s, netadr_t* a ) { if (s->sa_family == AF_INET) { a->type = NA_IP; *(int *)&a->ip = ((struct sockaddr_in *)s)->sin_addr.s_addr; a->port = ((struct sockaddr_in *)s)->sin_port; } } static qbool Sys_StringToSockaddr( const char *s, struct sockaddr *sadr ) { memset( sadr, 0, sizeof( *sadr ) ); ((struct sockaddr_in *)sadr)->sin_family = AF_INET; ((struct sockaddr_in *)sadr)->sin_port = 0; if( s[0] >= '0' && s[0] <= '9' ) { *(int *)&((struct sockaddr_in *)sadr)->sin_addr = inet_addr(s); } else { struct hostent* h; if( ( h = gethostbyname( s ) ) == 0 ) { return 0; } *(int *)&((struct sockaddr_in *)sadr)->sin_addr = *(int *)h->h_addr_list[0]; } return qtrue; } qbool Sys_StringToAdr( const char *s, netadr_t *a ) { struct sockaddr sadr; if ( !Sys_StringToSockaddr( s, &sadr ) ) { return qfalse; } SockadrToNetadr( &sadr, a ); return qtrue; } /////////////////////////////////////////////////////////////// // never called by the game logic, just the system event queing #ifdef _DEBUG static int recvfromCount; #endif qbool Sys_GetPacket( netadr_t* net_from, msg_t* net_message ) { if (ip_socket == INVALID_SOCKET) return qfalse; #ifdef _DEBUG ++recvfromCount; #endif struct sockaddr from; socklen_t fromlen = sizeof(from); int ret = recvfrom( ip_socket, (char*)net_message->data, net_message->maxsize, 0, (struct sockaddr *)&from, &fromlen ); if (ret == SOCKET_ERROR) { int err = socketError; if (err == EAGAIN || err == ECONNRESET) return qfalse; Com_Printf( "NET_GetPacket: %s\n", NET_ErrorString() ); return qfalse; } memset( ((struct sockaddr_in *)&from)->sin_zero, 0, 8 ); if ( usingSocks && memcmp( &from, &socksRelayAddr, fromlen ) == 0 ) { if ( ret < 10 || net_message->data[0] != 0 || net_message->data[1] != 0 || net_message->data[2] != 0 || net_message->data[3] != 1 ) { return qfalse; } net_from->type = NA_IP; net_from->ip[0] = net_message->data[4]; net_from->ip[1] = net_message->data[5]; net_from->ip[2] = net_message->data[6]; net_from->ip[3] = net_message->data[7]; net_from->port = *(short *)&net_message->data[8]; net_message->readcount = 10; } else { SockadrToNetadr( &from, net_from ); net_message->readcount = 0; } if( ret == net_message->maxsize ) { Com_Printf( "Oversize packet from %s\n", NET_AdrToString (*net_from) ); return qfalse; } net_message->cursize = ret; return qtrue; } void Sys_SendPacket( int length, const void* data, netadr_t to ) { static char socksBuf[4096]; int ret; if( to.type != NA_BROADCAST && to.type != NA_IP ) { Com_Error( ERR_FATAL, "Sys_SendPacket: bad address type" ); return; } if (ip_socket == INVALID_SOCKET) return; struct sockaddr addr; NetadrToSockadr( &to, &addr ); if( usingSocks && to.type == NA_IP ) { socksBuf[0] = 0; // reserved socksBuf[1] = 0; socksBuf[2] = 0; // fragment (not fragmented) socksBuf[3] = 1; // address type: IPV4 *(int *)&socksBuf[4] = ((struct sockaddr_in *)&addr)->sin_addr.s_addr; *(short *)&socksBuf[8] = ((struct sockaddr_in *)&addr)->sin_port; memcpy( &socksBuf[10], data, length ); ret = sendto( ip_socket, socksBuf, length+10, 0, &socksRelayAddr, sizeof(socksRelayAddr) ); } else { ret = sendto( ip_socket, (const char*)data, length, 0, &addr, sizeof(addr) ); } if (ret == SOCKET_ERROR) { int err = socketError; // wouldblock is silent if( err == EAGAIN ) { return; } // some PPP links do not allow broadcasts and return an error if( ( err == EADDRNOTAVAIL ) && ( ( to.type == NA_BROADCAST ) ) ) { return; } Com_Printf( "NET_SendPacket: %s\n", NET_ErrorString() ); } } /////////////////////////////////////////////////////////////// // LAN clients will have their rate var ignored qbool Sys_IsLANAddress( const netadr_t& adr ) { int i; if (adr.type == NA_LOOPBACK) return qtrue; if (adr.type != NA_IP) return qfalse; // RFC1918: // 10.0.0.0 - 10.255.255.255 (10/8 prefix) // 172.16.0.0 - 172.31.255.255 (172.16/12 prefix) // 192.168.0.0 - 192.168.255.255 (192.168/16 prefix) if(adr.ip[0] == 10) return qtrue; if(adr.ip[0] == 172 && (adr.ip[1]&0xf0) == 16) return qtrue; if(adr.ip[0] == 192 && adr.ip[1] == 168) return qtrue; // choose which comparison to use based on the class of the address being tested // any local adresses of a different class than the address being tested will fail based on the first byte // FIXME tma 28/08/07 Try and make this work for arbitrary subnet masks somehow if( adr.ip[0] == 127 && adr.ip[1] == 0 && adr.ip[2] == 0 && adr.ip[3] == 1 ) { return qtrue; } // Class A if( (adr.ip[0] & 0x80) == 0x00 ) { for ( i = 0 ; i < numIP ; i++ ) { if( adr.ip[0] == localIP[i][0] ) { return qtrue; } } return qfalse; } // Class B if( (adr.ip[0] & 0xc0) == 0x80 ) { for ( i = 0 ; i < numIP ; i++ ) { if( adr.ip[0] == localIP[i][0] && adr.ip[1] == localIP[i][1] ) { return qtrue; } } return qfalse; } // Class C for ( i = 0 ; i < numIP ; i++ ) { if( adr.ip[0] == localIP[i][0] && adr.ip[1] == localIP[i][1] && adr.ip[2] == localIP[i][2] ) { return qtrue; } } return qfalse; } void Sys_ShowIP() { for (int i = 0; i < numIP; ++i) { Com_Printf( "IP: %i.%i.%i.%i\n", localIP[i][0], localIP[i][1], localIP[i][2], localIP[i][3] ); } } /////////////////////////////////////////////////////////////// static SOCKET NET_IPSocket( const char* net_interface, int port ) { SOCKET newsocket; struct sockaddr_in address; Com_Printf( "Opening IP socket: %s:%i\n", net_interface ? net_interface : "localhost", port ); if( ( newsocket = socket( AF_INET, SOCK_DGRAM, IPPROTO_UDP ) ) == INVALID_SOCKET ) { int err = socketError; if (err != EAFNOSUPPORT) { Com_Printf( "WARNING: NET_IPSocket: socket: %s\n", NET_ErrorString() ); } return INVALID_SOCKET; } // make it non-blocking qboolean uglyapi = qtrue; if( ioctlsocket( newsocket, FIONBIO, (u_long*)&uglyapi ) == SOCKET_ERROR ) { Com_Printf( "WARNING: NET_IPSocket: ioctl FIONBIO: %s\n", NET_ErrorString() ); return INVALID_SOCKET; } // make it broadcast capable (note: winsock has the wrong prototype for the if( setsockopt( newsocket, SOL_SOCKET, SO_BROADCAST, (const char*)&uglyapi, sizeof(uglyapi) ) == SOCKET_ERROR ) { Com_Printf( "WARNING: NET_IPSocket: setsockopt SO_BROADCAST: %s\n", NET_ErrorString() ); return INVALID_SOCKET; } if( !net_interface || !net_interface[0] || !Q_stricmp(net_interface, "localhost") ) { address.sin_addr.s_addr = INADDR_ANY; } else { Sys_StringToSockaddr( net_interface, (struct sockaddr *)&address ); } address.sin_port = (port == PORT_ANY) ? 0 : htons( (unsigned short)port ); address.sin_family = AF_INET; if( bind( newsocket, (const sockaddr*)&address, sizeof(address) ) == SOCKET_ERROR ) { Com_Printf( "WARNING: NET_IPSocket: bind: %s\n", NET_ErrorString() ); closesocket( newsocket ); return INVALID_SOCKET; } return newsocket; } static void NET_OpenSocks( int port ) { const int SOCKS_VERSION = 5; struct sockaddr_in address; int err; struct hostent *h; int len; unsigned char buf[64]; usingSocks = qfalse; Com_Printf( "Opening connection to SOCKS server.\n" ); if ( ( socks_socket = socket( AF_INET, SOCK_STREAM, IPPROTO_TCP ) ) == INVALID_SOCKET ) { err = socketError; Com_Printf( "WARNING: NET_OpenSocks: socket: %s\n", NET_ErrorString() ); return; } h = gethostbyname( net_socksServer->string ); if ( h == NULL ) { err = socketError; Com_Printf( "WARNING: NET_OpenSocks: gethostbyname: %s\n", NET_ErrorString() ); return; } if ( h->h_addrtype != AF_INET ) { Com_Printf( "WARNING: NET_OpenSocks: gethostbyname: address type was not AF_INET\n" ); return; } address.sin_family = AF_INET; address.sin_addr.s_addr = *(int *)h->h_addr_list[0]; address.sin_port = htons( (short)net_socksPort->integer ); if ( connect( socks_socket, (struct sockaddr *)&address, sizeof( address ) ) == SOCKET_ERROR ) { err = socketError; Com_Printf( "NET_OpenSocks: connect: %s\n", NET_ErrorString() ); return; } // send socks authentication handshake qbool rfc1929 = (*net_socksUsername->string || *net_socksPassword->string); buf[0] = SOCKS_VERSION; // method count if ( rfc1929 ) { buf[1] = 2; len = 4; } else { buf[1] = 1; len = 3; } buf[2] = 0; // method #1 - method id #00: no authentication if ( rfc1929 ) { buf[2] = 2; // method #2 - method id #02: username/password } if ( send( socks_socket, (const char*)buf, len, 0 ) == SOCKET_ERROR ) { err = socketError; Com_Printf( "NET_OpenSocks: send: %s\n", NET_ErrorString() ); return; } // get the response len = recv( socks_socket, (char*)buf, 64, 0 ); if ( len == SOCKET_ERROR ) { err = socketError; Com_Printf( "NET_OpenSocks: recv: %s\n", NET_ErrorString() ); return; } if ( len != 2 || buf[0] != SOCKS_VERSION ) { Com_Printf( "NET_OpenSocks: bad response\n" ); return; } switch( buf[1] ) { case 0: // no authentication break; case 2: // username/password authentication break; default: Com_Printf( "NET_OpenSocks: request denied\n" ); return; } // do username/password authentication if needed if ( buf[1] == 2 ) { // build the request int ulen = strlen( net_socksUsername->string ); int plen = strlen( net_socksPassword->string ); buf[0] = 1; // username/password authentication version buf[1] = ulen; if ( ulen ) { memcpy( &buf[2], net_socksUsername->string, ulen ); } buf[2 + ulen] = plen; if ( plen ) { memcpy( &buf[3 + ulen], net_socksPassword->string, plen ); } // send it if ( send( socks_socket, (const char*)buf, 3 + ulen + plen, 0 ) == SOCKET_ERROR ) { err = socketError; Com_Printf( "NET_OpenSocks: send: %s\n", NET_ErrorString() ); return; } // get the response len = recv( socks_socket, (char*)buf, 64, 0 ); if ( len == SOCKET_ERROR ) { err = socketError; Com_Printf( "NET_OpenSocks: recv: %s\n", NET_ErrorString() ); return; } if ( len != 2 || buf[0] != 1 ) { Com_Printf( "NET_OpenSocks: bad response\n" ); return; } if ( buf[1] != 0 ) { Com_Printf( "NET_OpenSocks: authentication failed\n" ); return; } } // send the UDP associate request buf[0] = SOCKS_VERSION; buf[1] = 3; // command: UDP associate buf[2] = 0; // reserved buf[3] = 1; // address type: IPV4 *(int *)&buf[4] = INADDR_ANY; *(short *)&buf[8] = htons( (short)port ); // port if ( send( socks_socket, (const char*)buf, 10, 0 ) == SOCKET_ERROR ) { err = socketError; Com_Printf( "NET_OpenSocks: send: %s\n", NET_ErrorString() ); return; } // get the response len = recv( socks_socket, (char*)buf, 64, 0 ); if( len == SOCKET_ERROR ) { err = socketError; Com_Printf( "NET_OpenSocks: recv: %s\n", NET_ErrorString() ); return; } if( len < 2 || buf[0] != SOCKS_VERSION ) { Com_Printf( "NET_OpenSocks: bad response\n" ); return; } // check completion code if( buf[1] != 0 ) { Com_Printf( "NET_OpenSocks: request denied: %i\n", buf[1] ); return; } if( buf[3] != 1 ) { Com_Printf( "NET_OpenSocks: relay address is not IPV4: %i\n", buf[3] ); return; } ((struct sockaddr_in *)&socksRelayAddr)->sin_family = AF_INET; ((struct sockaddr_in *)&socksRelayAddr)->sin_addr.s_addr = *(int *)&buf[4]; ((struct sockaddr_in *)&socksRelayAddr)->sin_port = *(short *)&buf[8]; memset( ((struct sockaddr_in *)&socksRelayAddr)->sin_zero, 0, 8 ); usingSocks = qtrue; } #ifdef MACOS_X // Don't do a forward mapping from the hostname of the machine to the IP. // The reason is that we might have obtained an IP address from DHCP and // there might not be any name registered for the machine. On Mac OS X, // the machine name defaults to 'localhost' and NetInfo has 127.0.0.1 // listed for this name. Instead, we want to get a list of all the IP // network interfaces on the machine. This code adapted from OmniNetworking. #ifdef _SIZEOF_ADDR_IFREQ // tjw: OSX 10.4 does not have sa_len #define IFR_NEXT(ifr) \ ((struct ifreq *) ((char *) ifr + _SIZEOF_ADDR_IFREQ(*ifr))) #else // tjw: assume that once upon a time some version did have sa_len #define IFR_NEXT(ifr) \ ((struct ifreq *) ((char *) (ifr) + sizeof(*(ifr)) + \ MAX(0, (int) (ifr)->ifr_addr.sa_len - (int) sizeof((ifr)->ifr_addr)))) #endif static void NET_GetLocalAddress() { struct ifreq requestBuffer[MAX_IPS], *linkInterface, *inetInterface; struct ifconf ifc; struct ifreq ifr; struct sockaddr_dl *sdl; int interfaceSocket; int family; // Set this early so we can just return if there is an error numIP = 0; ifc.ifc_len = sizeof(requestBuffer); ifc.ifc_buf = (caddr_t)requestBuffer; // Since we get at this info via an ioctl, we need a temporary little socket. // This will only get AF_INET interfaces, but we probably don't care about // anything else. If we do end up caring later, we should add a // ONAddressFamily and at a -interfaces method to it. family = AF_INET; if ((interfaceSocket = socket(family, SOCK_DGRAM, 0)) < 0) { Com_Printf("NET_GetLocalAddress: Unable to create temporary socket, errno = %d\n", errno); return; } if (ioctl(interfaceSocket, SIOCGIFCONF, &ifc) != 0) { Com_Printf("NET_GetLocalAddress: Unable to get list of network interfaces, errno = %d\n", errno); return; } linkInterface = (struct ifreq *) ifc.ifc_buf; while ((char *) linkInterface < &ifc.ifc_buf[ifc.ifc_len]) { unsigned int nameLength; // The ioctl returns both the entries having the address (AF_INET) // and the link layer entries (AF_LINK). The AF_LINK entry has the // link layer address which contains the interface type. This is the // only way I can see to get this information. We cannot assume that // we will get bot an AF_LINK and AF_INET entry since the interface // may not be configured. For example, if you have a 10Mb port on // the motherboard and a 100Mb card, you may not configure the // motherboard port. // For each AF_LINK entry... if (linkInterface->ifr_addr.sa_family == AF_LINK) { // if there is a matching AF_INET entry inetInterface = (struct ifreq *) ifc.ifc_buf; while ((char *) inetInterface < &ifc.ifc_buf[ifc.ifc_len]) { if (inetInterface->ifr_addr.sa_family == AF_INET && !strncmp(inetInterface->ifr_name, linkInterface->ifr_name, sizeof(linkInterface->ifr_name))) { for (nameLength = 0; nameLength < IFNAMSIZ; nameLength++) if (!linkInterface->ifr_name[nameLength]) break; sdl = (struct sockaddr_dl *)&linkInterface->ifr_addr; // Skip loopback interfaces if (sdl->sdl_type != IFT_LOOP) { // Get the local interface address strncpy(ifr.ifr_name, inetInterface->ifr_name, sizeof(ifr.ifr_name)); if (ioctl(interfaceSocket, OSIOCGIFADDR, (caddr_t)&ifr) < 0) { Com_Printf("NET_GetLocalAddress: Unable to get local address " "for interface '%s', errno = %d\n", inetInterface->ifr_name, errno); } else { struct sockaddr_in *sin; int ip; sin = (struct sockaddr_in *)&ifr.ifr_addr; ip = ntohl(sin->sin_addr.s_addr); localIP[ numIP ][0] = (ip >> 24) & 0xff; localIP[ numIP ][1] = (ip >> 16) & 0xff; localIP[ numIP ][2] = (ip >> 8) & 0xff; localIP[ numIP ][3] = (ip >> 0) & 0xff; Com_Printf( "IP: %i.%i.%i.%i (%s)\n", localIP[ numIP ][0], localIP[ numIP ][1], localIP[ numIP ][2], localIP[ numIP ][3], inetInterface->ifr_name); numIP++; } } // We will assume that there is only one AF_INET entry per AF_LINK entry. // What happens when we have an interface that has multiple IP addresses, or // can that even happen? // break; } inetInterface = IFR_NEXT(inetInterface); } } linkInterface = IFR_NEXT(linkInterface); } close(interfaceSocket); } #else static void NET_GetLocalAddress() { int error; const char* p; char hostname[256]; if (gethostname( hostname, 256 ) == SOCKET_ERROR) { error = socketError; return; } const struct hostent* hostInfo = gethostbyname( hostname ); if (!hostInfo) { error = socketError; return; } Com_Printf( "Hostname: %s\n", hostInfo->h_name ); for (int n = 0; (p = hostInfo->h_aliases[n]); ++n) { Com_Printf( "Alias: %s\n", p ); } if (hostInfo->h_addrtype != AF_INET) return; numIP = 0; while ((p = hostInfo->h_addr_list[numIP]) && (numIP < MAX_IPS)) { int ip = ntohl( *(const int*)p ); localIP[ numIP ][0] = p[0]; localIP[ numIP ][1] = p[1]; localIP[ numIP ][2] = p[2]; localIP[ numIP ][3] = p[3]; Com_Printf( "IP: %i.%i.%i.%i\n", ( ip >> 24 ) & 0xff, ( ip >> 16 ) & 0xff, ( ip >> 8 ) & 0xff, ip & 0xff ); ++numIP; } } #endif static void NET_OpenIP() { const cvar_t* ip = Cvar_Get( "net_ip", "localhost", CVAR_LATCH ); int port = Cvar_Get( "net_port", va( "%i", PORT_SERVER ), CVAR_LATCH )->integer; // automatically scan for a valid port, so multiple // dedicated servers can be started without requiring // a different net_port for each one for (int i = 0; i < 10; ++i) { ip_socket = NET_IPSocket( ip->string, port + i ); if (ip_socket != INVALID_SOCKET) { Cvar_SetValue( "net_port", port + i ); if ( net_socksEnabled->integer ) { NET_OpenSocks( port + i ); } NET_GetLocalAddress(); return; } } Com_Printf( "WARNING: Couldn't allocate IP port\n"); } /////////////////////////////////////////////////////////////// static qboolean NET_GetCvars() { qboolean modified = qfalse; if (net_noudp && net_noudp->modified) modified = qtrue; net_noudp = Cvar_Get( "net_noudp", "0", CVAR_LATCH | CVAR_ARCHIVE ); if (net_socksEnabled && net_socksEnabled->modified) modified = qtrue; net_socksEnabled = Cvar_Get( "net_socksEnabled", "0", CVAR_LATCH | CVAR_ARCHIVE ); if (net_socksEnabled->integer) { if (net_socksServer && net_socksServer->modified) modified = qtrue; net_socksServer = Cvar_Get( "net_socksServer", "", CVAR_LATCH | CVAR_ARCHIVE ); if (net_socksPort && net_socksPort->modified) modified = qtrue; net_socksPort = Cvar_Get( "net_socksPort", "1080", CVAR_LATCH | CVAR_ARCHIVE ); if (net_socksUsername && net_socksUsername->modified) modified = qtrue; net_socksUsername = Cvar_Get( "net_socksUsername", "", CVAR_LATCH | CVAR_ARCHIVE ); if (net_socksPassword && net_socksPassword->modified) modified = qtrue; net_socksPassword = Cvar_Get( "net_socksPassword", "", CVAR_LATCH | CVAR_ARCHIVE ); } return modified; } static void NET_Config( qboolean enableNetworking ) { // get any latched changes to cvars qboolean modified = NET_GetCvars(); if (net_noudp->integer) enableNetworking = qfalse; // if enable state is the same and no cvars were modified, we have nothing to do if ((enableNetworking == networkingEnabled) && !modified) return; qboolean stop; if (enableNetworking == networkingEnabled) { stop = enableNetworking; } else { stop = !enableNetworking; networkingEnabled = enableNetworking; } if (stop) { if (ip_socket != INVALID_SOCKET) { closesocket( ip_socket ); ip_socket = INVALID_SOCKET; } if (socks_socket != INVALID_SOCKET) { closesocket( socks_socket ); socks_socket = INVALID_SOCKET; } } if (enableNetworking && !net_noudp->integer) { NET_OpenIP(); } } void NET_Init() { QSUBSYSTEM_INIT_START( "Networking" ); #ifdef _WIN32 int r = WSAStartup( MAKEWORD( 1, 1 ), &winsockdata ); if (r) { Com_Printf( "WARNING: Winsock initialization failed, returned %d\n", r ); return; } Com_Printf( "Winsock Initialized\n" ); #endif // this is really just to get the cvars registered NET_GetCvars(); NET_Config( qtrue ); QSUBSYSTEM_INIT_DONE( "Networking" ); } void NET_Shutdown() { if (!networkingEnabled) return; NET_Config( qfalse ); #ifdef _WIN32 WSACleanup(); #endif } // sleeps msec or until something happens on the network void NET_Sleep( int msec ) { struct timeval timeout; fd_set fdset; if (!com_dedicated->integer) return; // we're not a server, just run full speed if (ip_socket == INVALID_SOCKET) return; if (msec < 0) return; FD_ZERO(&fdset); FD_SET(ip_socket, &fdset); timeout.tv_sec = msec/1000; timeout.tv_usec = (msec%1000)*1000; select(ip_socket+1, &fdset, NULL, NULL, &timeout); } void NET_Restart() { NET_Config( networkingEnabled ); }