* Merge win_net.c and unix_net.c

  + Move win32/win_net.c to qcommon/net_ip.c and make it portable
  + Remove unix_net.c, but incorporate its revision history into win_net.c
  + Remove all IPX support -- this remains compatible with existing mods
  + This change also inadvertently gets us SOCKS support on non-Windows
    platforms


git-svn-id: svn://svn.icculus.org/quake3/trunk@1139 edf5b092-35ff-0310-97b2-ce42778d08ea

1 files changed, 1082 insertions, 0 deletions

diff --git a/code/qcommon/net_ip.c b/code/qcommon/net_ip.c
new file mode 100644
index 0000000..9248db3
--- /dev/null
+++ b/code/qcommon/net_ip.c
@@ -0,0 +1,1082 @@
+/*
+===========================================================================
+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 <winsock.h>
+
+typedef int socklen_t;
+#define EAGAIN				WSAEWOULDBLOCK
+#define EADDRNOTAVAIL	WSAEADDRNOTAVAIL
+#define EAFNOSUPPORT	WSAEAFNOSUPPORT
+#define ECONNRESET		WSAECONNRESET
+#define socketError		WSAGetLastError( )
+
+static WSADATA	winsockdata;
+static qboolean	winsockInitialized = qfalse;
+
+#else
+
+#if MAC_OS_X_VERSION_MIN_REQUIRED == 1020
+	// needed for socklen_t on OSX 10.2
+#	define _BSD_SOCKLEN_T_
+#endif
+
+#include <arpa/inet.h>
+#include <errno.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#ifdef MACOS_X
+#include <sys/sockio.h>
+#include <net/if.h>
+#include <net/if_types.h>
+#include <net/if_dl.h>         // for 'struct sockaddr_dl'
+#endif
+
+#ifdef __sun
+#include <sys/filio.h>
+#endif
+
+typedef int SOCKET;
+#define 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;
+static SOCKET	socks_socket;
+
+#define	MAX_IPS		16
+static	int		numIP;
+static	byte	localIP[MAX_IPS][4];
+
+//=============================================================================
+
+
+/*
+====================
+NET_ErrorString
+====================
+*/
+char *NET_ErrorString( void ) {
+#ifdef _WIN32
+	//FIXME: replace with FormatMessage?
+	switch( socketError ) {
+		case WSAEINTR: return "WSAEINTR";
+		case WSAEBADF: return "WSAEBADF";
+		case WSAEACCES: return "WSAEACCES";
+		case WSAEDISCON: return "WSAEDISCON";
+		case WSAEFAULT: return "WSAEFAULT";
+		case WSAEINVAL: return "WSAEINVAL";
+		case WSAEMFILE: return "WSAEMFILE";
+		case WSAEWOULDBLOCK: return "WSAEWOULDBLOCK";
+		case WSAEINPROGRESS: return "WSAEINPROGRESS";
+		case WSAEALREADY: return "WSAEALREADY";
+		case WSAENOTSOCK: return "WSAENOTSOCK";
+		case WSAEDESTADDRREQ: return "WSAEDESTADDRREQ";
+		case WSAEMSGSIZE: return "WSAEMSGSIZE";
+		case WSAEPROTOTYPE: return "WSAEPROTOTYPE";
+		case WSAENOPROTOOPT: return "WSAENOPROTOOPT";
+		case WSAEPROTONOSUPPORT: return "WSAEPROTONOSUPPORT";
+		case WSAESOCKTNOSUPPORT: return "WSAESOCKTNOSUPPORT";
+		case WSAEOPNOTSUPP: return "WSAEOPNOTSUPP";
+		case WSAEPFNOSUPPORT: return "WSAEPFNOSUPPORT";
+		case WSAEAFNOSUPPORT: return "WSAEAFNOSUPPORT";
+		case WSAEADDRINUSE: return "WSAEADDRINUSE";
+		case WSAEADDRNOTAVAIL: return "WSAEADDRNOTAVAIL";
+		case WSAENETDOWN: return "WSAENETDOWN";
+		case WSAENETUNREACH: return "WSAENETUNREACH";
+		case WSAENETRESET: return "WSAENETRESET";
+		case WSAECONNABORTED: return "WSWSAECONNABORTEDAEINTR";
+		case WSAECONNRESET: return "WSAECONNRESET";
+		case WSAENOBUFS: return "WSAENOBUFS";
+		case WSAEISCONN: return "WSAEISCONN";
+		case WSAENOTCONN: return "WSAENOTCONN";
+		case WSAESHUTDOWN: return "WSAESHUTDOWN";
+		case WSAETOOMANYREFS: return "WSAETOOMANYREFS";
+		case WSAETIMEDOUT: return "WSAETIMEDOUT";
+		case WSAECONNREFUSED: return "WSAECONNREFUSED";
+		case WSAELOOP: return "WSAELOOP";
+		case WSAENAMETOOLONG: return "WSAENAMETOOLONG";
+		case WSAEHOSTDOWN: return "WSAEHOSTDOWN";
+		case WSASYSNOTREADY: return "WSASYSNOTREADY";
+		case WSAVERNOTSUPPORTED: return "WSAVERNOTSUPPORTED";
+		case WSANOTINITIALISED: return "WSANOTINITIALISED";
+		case WSAHOST_NOT_FOUND: return "WSAHOST_NOT_FOUND";
+		case WSATRY_AGAIN: return "WSATRY_AGAIN";
+		case WSANO_RECOVERY: return "WSANO_RECOVERY";
+		case WSANO_DATA: return "WSANO_DATA";
+		default: return "NO ERROR";
+	}
+#else
+	return strerror (errno);
+#endif
+}
+
+static void NetadrToSockadr( 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( 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;
+	}
+}
+
+
+/*
+=============
+Sys_StringToSockaddr
+=============
+*/
+static qboolean Sys_StringToSockaddr( const char *s, struct sockaddr *sadr ) {
+	struct hostent	*h;
+	
+	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 ) ) == 0 ) {
+			return 0;
+		}
+		*(int *)&((struct sockaddr_in *)sadr)->sin_addr = *(int *)h->h_addr_list[0];
+	}
+	
+	return qtrue;
+}
+
+/*
+=============
+Sys_StringToAdr
+=============
+*/
+qboolean Sys_StringToAdr( const char *s, netadr_t *a ) {
+	struct sockaddr sadr;
+	
+	if ( !Sys_StringToSockaddr( s, &sadr ) ) {
+		return qfalse;
+	}
+	
+	SockadrToNetadr( &sadr, a );
+	return qtrue;
+}
+
+//=============================================================================
+
+/*
+==================
+Sys_GetPacket
+
+Never called by the game logic, just the system event queing
+==================
+*/
+#ifdef _DEBUG
+int	recvfromCount;
+#endif
+
+qboolean Sys_GetPacket( netadr_t *net_from, msg_t *net_message ) {
+	int 	ret;
+	struct sockaddr from;
+	socklen_t	fromlen;
+	int		err;
+
+	if( !ip_socket ) {
+		return qfalse;
+	}
+
+	fromlen = sizeof(from);
+#ifdef _DEBUG
+	recvfromCount++;		// performance check
+#endif
+	ret = recvfrom( ip_socket, net_message->data, net_message->maxsize, 0, (struct sockaddr *)&from, &fromlen );
+	if (ret == SOCKET_ERROR)
+	{
+		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;
+}
+
+//=============================================================================
+
+static char socksBuf[4096];
+
+/*
+==================
+Sys_SendPacket
+==================
+*/
+void Sys_SendPacket( int length, const void *data, netadr_t to ) {
+	int				ret;
+	struct sockaddr	addr;
+
+	if( to.type != NA_BROADCAST && to.type != NA_IP ) {
+		Com_Error( ERR_FATAL, "Sys_SendPacket: bad address type" );
+		return;
+	}
+
+	if( !ip_socket ) {
+		return;
+	}
+
+	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, 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() );
+	}
+}
+
+
+//=============================================================================
+
+/*
+==================
+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_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;
+}
+
+/*
+==================
+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_IPSocket
+====================
+*/
+int NET_IPSocket( char *net_interface, int port ) {
+	SOCKET				newsocket;
+	struct sockaddr_in	address;
+	qboolean			_true = qtrue;
+	int					i = 1;
+	int					err;
+
+	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( AF_INET, SOCK_DGRAM, IPPROTO_UDP ) ) == INVALID_SOCKET ) {
+		err = socketError;
+		if( err != EAFNOSUPPORT ) {
+			Com_Printf( "WARNING: UDP_OpenSocket: socket: %s\n", NET_ErrorString() );
+		}
+		return 0;
+	}
+
+	// make it non-blocking
+	if( ioctlsocket( newsocket, FIONBIO, (u_long *)&_true ) == SOCKET_ERROR ) {
+		Com_Printf( "WARNING: 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) ) == SOCKET_ERROR ) {
+		Com_Printf( "WARNING: 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) ) == SOCKET_ERROR ) {
+		Com_Printf( "WARNING: UDP_OpenSocket: bind: %s\n", NET_ErrorString() );
+		closesocket( newsocket );
+		return 0;
+	}
+
+	return newsocket;
+}
+
+
+/*
+====================
+NET_OpenSocks
+====================
+*/
+void NET_OpenSocks( int port ) {
+	struct sockaddr_in	address;
+	int					err;
+	struct hostent		*h;
+	int					len;
+	qboolean			rfc1929;
+	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
+	if ( *net_socksUsername->string || *net_socksPassword->string ) {
+		rfc1929 = qtrue;
+	}
+	else {
+		rfc1929 = qfalse;
+	}
+
+	buf[0] = 5;		// 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, buf, len, 0 ) == SOCKET_ERROR ) {
+		err = socketError;
+		Com_Printf( "NET_OpenSocks: send: %s\n", NET_ErrorString() );
+		return;
+	}
+
+	// get the response
+	len = recv( socks_socket, buf, 64, 0 );
+	if ( len == SOCKET_ERROR ) {
+		err = socketError;
+		Com_Printf( "NET_OpenSocks: recv: %s\n", NET_ErrorString() );
+		return;
+	}
+	if ( len != 2 || buf[0] != 5 ) {
+		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 ) {
+		int		ulen;
+		int		plen;
+
+		// build the request
+		ulen = strlen( net_socksUsername->string );
+		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, 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, 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] = 5;		// 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, buf, 10, 0 ) == SOCKET_ERROR ) {
+		err = socketError;
+		Com_Printf( "NET_OpenSocks: send: %s\n", NET_ErrorString() );
+		return;
+	}
+
+	// get the response
+	len = recv( socks_socket, buf, 64, 0 );
+	if( len == SOCKET_ERROR ) {
+		err = socketError;
+		Com_Printf( "NET_OpenSocks: recv: %s\n", NET_ErrorString() );
+		return;
+	}
+	if( len < 2 || buf[0] != 5 ) {
+		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;
+}
+
+
+/*
+=====================
+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;
+	char				*p;
+	int					ip;
+	int					n;
+
+	if( gethostname( hostname, 256 ) == SOCKET_ERROR ) {
+		error = socketError;
+		return;
+	}
+
+	hostInfo = gethostbyname( hostname );
+	if( !hostInfo ) {
+		error = socketError;
+		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 );
+		numIP++;
+	}
+}
+#endif
+
+/*
+====================
+NET_OpenIP
+====================
+*/
+void NET_OpenIP( void ) {
+	cvar_t	*ip;
+	int		port;
+	int		i;
+
+	ip = Cvar_Get( "net_ip", "localhost", CVAR_LATCH );
+	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( i = 0 ; i < 10 ; i++ ) {
+		ip_socket = NET_IPSocket( ip->string, port + i );
+		if ( ip_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");
+}
+
+
+//===================================================================
+
+
+/*
+====================
+NET_GetCvars
+====================
+*/
+static qboolean NET_GetCvars( void ) {
+	qboolean	modified;
+
+	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_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;
+}
+
+
+/*
+====================
+NET_Config
+====================
+*/
+void NET_Config( qboolean enableNetworking ) {
+	qboolean	modified;
+	qboolean	stop;
+	qboolean	start;
+
+	// get any latched changes to cvars
+	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;
+	}
+
+	if( enableNetworking == networkingEnabled ) {
+		if( enableNetworking ) {
+			stop = qtrue;
+			start = qtrue;
+		}
+		else {
+			stop = qfalse;
+			start = qfalse;
+		}
+	}
+	else {
+		if( enableNetworking ) {
+			stop = qfalse;
+			start = qtrue;
+		}
+		else {
+			stop = qtrue;
+			start = qfalse;
+		}
+		networkingEnabled = enableNetworking;
+	}
+
+	if( stop ) {
+		if ( ip_socket && ip_socket != INVALID_SOCKET ) {
+			closesocket( ip_socket );
+			ip_socket = 0;
+		}
+
+		if ( socks_socket && socks_socket != INVALID_SOCKET ) {
+			closesocket( socks_socket );
+			socks_socket = 0;
+		}
+	}
+
+	if( start ) {
+		if (! net_noudp->integer ) {
+			NET_OpenIP();
+		}
+	}
+}
+
+
+/*
+====================
+NET_Init
+====================
+*/
+void NET_Init( void ) {
+#ifdef _WIN32
+	int		r;
+
+	r = WSAStartup( MAKEWORD( 1, 1 ), &winsockdata );
+	if( r ) {
+		Com_Printf( "WARNING: Winsock initialization failed, returned %d\n", r );
+		return;
+	}
+
+	winsockInitialized = qtrue;
+	Com_Printf( "Winsock Initialized\n" );
+#endif
+
+	// this is really just to get the cvars registered
+	NET_GetCvars();
+
+	NET_Config( qtrue );
+}
+
+
+/*
+====================
+NET_Shutdown
+====================
+*/
+void NET_Shutdown( void ) {
+	if ( !networkingEnabled ) {
+		return;
+	}
+
+	NET_Config( qfalse );
+
+#ifdef _WIN32
+	WSACleanup();
+	winsockInitialized = qfalse;
+#endif
+}
+
+
+/*
+====================
+NET_Sleep
+
+Sleeps msec or until net socket is ready
+====================
+*/
+void NET_Sleep( int msec ) {
+	struct timeval timeout;
+	fd_set	fdset;
+#ifndef _WIN32 //FIXME
+	extern qboolean stdin_active;
+#endif
+	int highestfd = 0;
+
+	if (!com_dedicated->integer)
+		return; // we're not a server, just run full speed
+
+	FD_ZERO(&fdset);
+#ifndef _WIN32 //FIXME
+	if (stdin_active)
+	{
+		FD_SET(0, &fdset); // stdin is processed too
+		highestfd = 1;
+	}
+#endif
+	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);
+		}
+	}
+}
+
+
+/*
+====================
+NET_Restart_f
+====================
+*/
+void NET_Restart( void ) {
+	NET_Config( networkingEnabled );
+}