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Diffstat (limited to 'src/unix/unix_net.c')
| -rw-r--r-- | src/unix/unix_net.c | 684 |
1 files changed, 684 insertions, 0 deletions
diff --git a/src/unix/unix_net.c b/src/unix/unix_net.c new file mode 100644 index 0000000..8670667 --- /dev/null +++ b/src/unix/unix_net.c @@ -0,0 +1,684 @@ +/* +=========================================================================== +Copyright (C) 1999-2005 Id Software, Inc. +Copyright (C) 2000-2006 Tim Angus + +This file is part of Tremulous. + +Tremulous 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. + +Tremulous 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 Tremulous; 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 <unistd.h> +#if MAC_OS_X_VERSION_MIN_REQUIRED == 1020 + // needed for socket_t on OSX 10.2 + #define _BSD_SOCKLEN_T_ +#endif +#include <sys/socket.h> +#include <sys/time.h> +#include <netinet/in.h> +#include <netdb.h> +#include <arpa/inet.h> // bk001204 + +#include <sys/param.h> +#include <sys/ioctl.h> +#include <sys/uio.h> +#include <errno.h> + +#ifdef MACOS_X +#import <sys/sockio.h> +#import <net/if.h> +#import <net/if_types.h> + +#import <arpa/inet.h> // for inet_ntoa() +#import <net/if_dl.h> // for 'struct sockaddr_dl' +#endif + +#ifdef __sun +#include <sys/filio.h> +#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); + } + } +} + |