/* =========================================================================== 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 =========================================================================== */ // unix_net.c #include "../qcommon/q_shared.h" #include "../qcommon/qcommon.h" #include #if MAC_OS_X_VERSION_MIN_REQUIRED == 1020 // needed for socket_t on OSX 10.2 #define _BSD_SOCKLEN_T_ #endif #include #include #include #include #include // bk001204 #include #include #include #include #ifdef MACOS_X #import #import #import #import // for inet_ntoa() #import // for 'struct sockaddr_dl' #endif #ifdef __sun #include #endif static cvar_t *noudp; netadr_t net_local_adr; int ip_socket; int ipx_socket; #define MAX_IPS 16 static int numIP; static byte localIP[MAX_IPS][4]; int NET_Socket (char *net_interface, int port); char *NET_ErrorString (void); //============================================================================= void NetadrToSockadr (netadr_t *a, struct sockaddr_in *s) { memset (s, 0, sizeof(*s)); if (a->type == NA_BROADCAST) { s->sin_family = AF_INET; s->sin_port = a->port; *(int *)&s->sin_addr = -1; } else if (a->type == NA_IP) { s->sin_family = AF_INET; *(int *)&s->sin_addr = *(int *)&a->ip; s->sin_port = a->port; } } void SockadrToNetadr (struct sockaddr_in *s, netadr_t *a) { *(int *)&a->ip = *(int *)&s->sin_addr; a->port = s->sin_port; a->type = NA_IP; } char *NET_BaseAdrToString (netadr_t a) { static char s[64]; Com_sprintf (s, sizeof(s), "%i.%i.%i.%i", a.ip[0], a.ip[1], a.ip[2], a.ip[3]); return s; } /* ============= Sys_StringToAdr idnewt 192.246.40.70 ============= */ qboolean Sys_StringToSockaddr (const char *s, struct sockaddr *sadr) { struct hostent *h; //char *colon; // bk001204 - unused 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 { if (! (h = gethostbyname(s)) ) return qfalse; *(int *)&((struct sockaddr_in *)sadr)->sin_addr = *(int *)h->h_addr_list[0]; } return qtrue; } /* ============= Sys_StringToAdr localhost idnewt idnewt:28000 192.246.40.70 192.246.40.70:28000 ============= */ qboolean Sys_StringToAdr (const char *s, netadr_t *a) { struct sockaddr_in sadr; if (!Sys_StringToSockaddr (s, (struct sockaddr *)&sadr)) return qfalse; SockadrToNetadr (&sadr, a); return qtrue; } //============================================================================= qboolean Sys_GetPacket (netadr_t *net_from, msg_t *net_message) { int ret; struct sockaddr_in from; socklen_t fromlen; int net_socket; int protocol; int err; for (protocol = 0 ; protocol < 2 ; protocol++) { if (protocol == 0) net_socket = ip_socket; else net_socket = ipx_socket; if (!net_socket) continue; fromlen = sizeof(from); ret = recvfrom (net_socket, net_message->data, net_message->maxsize , 0, (struct sockaddr *)&from, &fromlen); SockadrToNetadr (&from, net_from); // bk000305: was missing net_message->readcount = 0; if (ret == -1) { err = errno; if (err == EWOULDBLOCK || err == ECONNREFUSED) continue; Com_Printf ("NET_GetPacket: %s from %s\n", NET_ErrorString(), NET_AdrToString(*net_from)); continue; } if (ret == net_message->maxsize) { Com_Printf ("Oversize packet from %s\n", NET_AdrToString (*net_from)); continue; } net_message->cursize = ret; return qtrue; } return qfalse; } //============================================================================= void Sys_SendPacket( int length, const void *data, netadr_t to ) { int ret; struct sockaddr_in addr; int net_socket; if (to.type == NA_BROADCAST) { net_socket = ip_socket; } else if (to.type == NA_IP) { net_socket = ip_socket; } else if (to.type == NA_IPX) { net_socket = ipx_socket; } else if (to.type == NA_BROADCAST_IPX) { net_socket = ipx_socket; } else { Com_Error (ERR_FATAL, "NET_SendPacket: bad address type"); return; } if (!net_socket) return; NetadrToSockadr (&to, &addr); ret = sendto (net_socket, data, length, 0, (struct sockaddr *)&addr, sizeof(addr) ); if (ret == -1) { Com_Printf ("NET_SendPacket ERROR: %s to %s\n", NET_ErrorString(), NET_AdrToString (to)); } } //============================================================================= /* ================== Sys_IsLANAddress LAN clients will have their rate var ignored ================== */ qboolean Sys_IsLANAddress (netadr_t adr) { int i; if( adr.type == NA_LOOPBACK ) { return qtrue; } if( adr.type == NA_IPX ) { 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; // the checks below are bogus, aren't they? -- ln // 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 // Class A if( (adr.ip[0] & 0x80) == 0x00 ) { for ( i = 0 ; i < numIP ; i++ ) { if( adr.ip[0] == localIP[i][0] ) { return qtrue; } } // the RFC1918 class a block will pass the above test 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; } // also check against the RFC1918 class b blocks if( adr.ip[0] == 172 && localIP[i][0] == 172 && (adr.ip[1] & 0xf0) == 16 && (localIP[i][1] & 0xf0) == 16 ) { 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; } // also check against the RFC1918 class c blocks if( adr.ip[0] == 192 && localIP[i][0] == 192 && adr.ip[1] == 168 && localIP[i][1] == 168 ) { return qtrue; } } return qfalse; } /* ================== Sys_ShowIP ================== */ void Sys_ShowIP(void) { int i; for (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] ); } } /* ===================== NET_GetLocalAddress ===================== */ #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 void NET_GetLocalAddress( void ) { 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 void NET_GetLocalAddress( void ) { char hostname[256]; struct hostent *hostInfo; // int error; // bk001204 - unused char *p; int ip; int n; if ( gethostname( hostname, 256 ) == -1 ) { return; } hostInfo = gethostbyname( hostname ); if ( !hostInfo ) { return; } Com_Printf( "Hostname: %s\n", hostInfo->h_name ); n = 0; while( ( p = hostInfo->h_aliases[n++] ) != NULL ) { Com_Printf( "Alias: %s\n", p ); } if ( hostInfo->h_addrtype != AF_INET ) { return; } numIP = 0; while( ( p = hostInfo->h_addr_list[numIP++] ) != NULL && numIP < MAX_IPS ) { ip = ntohl( *(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 ); } } #endif /* ==================== NET_OpenIP ==================== */ // bk001204 - prototype needed int NET_IPSocket (char *net_interface, int port); void NET_OpenIP (void) { cvar_t *ip; int port; int i; ip = Cvar_Get ("net_ip", "localhost", 0); port = Cvar_Get("net_port", va("%i", PORT_SERVER), 0)->value; for ( i = 0 ; i < 10 ; i++ ) { ip_socket = NET_IPSocket (ip->string, port + i); if ( ip_socket ) { Cvar_SetValue( "net_port", port + i ); NET_GetLocalAddress(); return; } } Com_Error (ERR_FATAL, "Couldn't allocate IP port"); } /* ==================== NET_Init ==================== */ void NET_Init (void) { noudp = Cvar_Get ("net_noudp", "0", 0); // open sockets if (! noudp->value) { NET_OpenIP (); } } /* ==================== NET_IPSocket ==================== */ int NET_IPSocket (char *net_interface, int port) { int newsocket; struct sockaddr_in address; qboolean _qtrue = qtrue; int i = 1; if ( net_interface ) { Com_Printf("Opening IP socket: %s:%i\n", net_interface, port ); } else { Com_Printf("Opening IP socket: localhost:%i\n", port ); } if ((newsocket = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1) { Com_Printf ("ERROR: UDP_OpenSocket: socket: %s", NET_ErrorString()); return 0; } // make it non-blocking if (ioctl (newsocket, FIONBIO, &_qtrue) == -1) { Com_Printf ("ERROR: UDP_OpenSocket: ioctl FIONBIO:%s\n", NET_ErrorString()); return 0; } // make it broadcast capable if (setsockopt(newsocket, SOL_SOCKET, SO_BROADCAST, (char *)&i, sizeof(i)) == -1) { Com_Printf ("ERROR: UDP_OpenSocket: setsockopt SO_BROADCAST:%s\n", NET_ErrorString()); return 0; } 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); if (port == PORT_ANY) address.sin_port = 0; else address.sin_port = htons((short)port); address.sin_family = AF_INET; if( bind (newsocket, (void *)&address, sizeof(address)) == -1) { Com_Printf ("ERROR: UDP_OpenSocket: bind: %s\n", NET_ErrorString()); close (newsocket); return 0; } return newsocket; } /* ==================== NET_Shutdown ==================== */ void NET_Shutdown (void) { if (ip_socket) { close(ip_socket); ip_socket = 0; } } /* ==================== NET_ErrorString ==================== */ char *NET_ErrorString (void) { int code; code = errno; return strerror (code); } // sleeps msec or until net socket is ready void NET_Sleep(int msec) { struct timeval timeout; fd_set fdset; extern qboolean stdin_active; int highestfd = 0; if (!com_dedicated->integer) return; // we're not a server, just run full speed FD_ZERO(&fdset); if (stdin_active) { FD_SET(0, &fdset); // stdin is processed too highestfd = 1; } if(ip_socket) { FD_SET(ip_socket, &fdset); // network socket if(ip_socket >= highestfd) highestfd = ip_socket + 1; } if(highestfd) { if(msec >= 0) { timeout.tv_sec = msec/1000; timeout.tv_usec = (msec%1000)*1000; select(highestfd, &fdset, NULL, NULL, &timeout); } else { // Block indefinitely select(highestfd, &fdset, NULL, NULL, NULL); } } }