Initial import.

1 files changed, 1727 insertions, 0 deletions

diff --git a/src/qcommon/net_ip.c b/src/qcommon/net_ip.c
new file mode 100644
index 0000000..e3a95e4
--- /dev/null
+++ b/src/qcommon/net_ip.c
@@ -0,0 +1,1727 @@
+/*
+===========================================================================
+Copyright (C) 1999-2005 Id Software, Inc.
+Copyright (C) 2000-2009 Darklegion Development
+
+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
+===========================================================================
+*/
+
+#include "../qcommon/q_shared.h"
+#include "../qcommon/qcommon.h"
+
+#ifdef _WIN32
+#	include <winsock2.h>
+#	include <ws2tcpip.h>
+#	if WINVER < 0x501
+#		ifdef __MINGW32__
+			// wspiapi.h isn't available on MinGW, so if it's
+			// present it's because the end user has added it
+			// and we should look for it in our tree
+#			include "wspiapi.h"
+#		else
+#			include <wspiapi.h>
+#		endif
+#	else
+#		include <ws2spi.h>
+#	endif
+
+typedef int socklen_t;
+#	ifdef ADDRESS_FAMILY
+#		define sa_family_t	ADDRESS_FAMILY
+#	else
+typedef unsigned short sa_family_t;
+#	endif
+
+#	define EAGAIN					WSAEWOULDBLOCK
+#	define EADDRNOTAVAIL	WSAEADDRNOTAVAIL
+#	define EAFNOSUPPORT		WSAEAFNOSUPPORT
+#	define ECONNRESET			WSAECONNRESET
+typedef u_long	ioctlarg_t;
+#	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/socket.h>
+#	include <net/if.h>
+#	include <sys/ioctl.h>
+#	include <sys/types.h>
+#	include <sys/time.h>
+#	include <unistd.h>
+#	if !defined(__sun) && !defined(__sgi)
+#		include <ifaddrs.h>
+#	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
+typedef int	ioctlarg_t;
+#	define socketError			errno
+
+#endif
+
+static qboolean usingSocks = qfalse;
+static int networkingEnabled = 0;
+
+static cvar_t	*net_enabled;
+
+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 cvar_t	*net_ip;
+static cvar_t	*net_ip6;
+static cvar_t	*net_port;
+static cvar_t	*net_port6;
+static cvar_t	*net_mcast6addr;
+static cvar_t	*net_mcast6iface;
+
+static cvar_t	*net_dropsim;
+
+static struct sockaddr	socksRelayAddr;
+
+static SOCKET	ip_socket = INVALID_SOCKET;
+static SOCKET	ip6_socket = INVALID_SOCKET;
+static SOCKET	socks_socket = INVALID_SOCKET;
+static SOCKET	multicast6_socket = INVALID_SOCKET;
+
+// Keep track of currently joined multicast group.
+static struct ipv6_mreq curgroup;
+// And the currently bound address.
+static struct sockaddr_in6 boundto;
+
+#ifndef IF_NAMESIZE
+  #define IF_NAMESIZE 16
+#endif
+
+// use an admin local address per default so that network admins can decide on how to handle quake3 traffic.
+#define NET_MULTICAST_IP6 "ff04::696f:7175:616b:6533"
+
+#define	MAX_IPS		32
+
+typedef struct
+{
+	char ifname[IF_NAMESIZE];
+	
+	netadrtype_t type;
+	sa_family_t family;
+	struct sockaddr_storage addr;
+	struct sockaddr_storage netmask;
+} nip_localaddr_t;
+
+static nip_localaddr_t localIP[MAX_IPS];
+static int numIP;
+
+
+//=============================================================================
+
+
+/*
+====================
+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(socketError);
+#endif
+}
+
+static void NetadrToSockadr( netadr_t *a, struct sockaddr *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;
+	}
+	else if( a->type == NA_IP6 ) {
+		((struct sockaddr_in6 *)s)->sin6_family = AF_INET6;
+		((struct sockaddr_in6 *)s)->sin6_addr = * ((struct in6_addr *) &a->ip6);
+		((struct sockaddr_in6 *)s)->sin6_port = a->port;
+		((struct sockaddr_in6 *)s)->sin6_scope_id = a->scope_id;
+	}
+	else if(a->type == NA_MULTICAST6)
+	{
+		((struct sockaddr_in6 *)s)->sin6_family = AF_INET6;
+		((struct sockaddr_in6 *)s)->sin6_addr = curgroup.ipv6mr_multiaddr;
+		((struct sockaddr_in6 *)s)->sin6_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;
+	}
+	else if(s->sa_family == AF_INET6)
+	{
+		a->type = NA_IP6;
+		memcpy(a->ip6, &((struct sockaddr_in6 *)s)->sin6_addr, sizeof(a->ip6));
+		a->port = ((struct sockaddr_in6 *)s)->sin6_port;
+		a->scope_id = ((struct sockaddr_in6 *)s)->sin6_scope_id;
+	}
+}
+
+
+static struct addrinfo *SearchAddrInfo(struct addrinfo *hints, sa_family_t family)
+{
+	while(hints)
+	{
+		if(hints->ai_family == family)
+			return hints;
+
+		hints = hints->ai_next;
+	}
+	
+	return NULL;
+}
+
+/*
+=============
+Sys_StringToSockaddr
+=============
+*/
+static qboolean Sys_StringToSockaddr(const char *s, struct sockaddr *sadr, int sadr_len, sa_family_t family)
+{
+	struct addrinfo hints;
+	struct addrinfo *res = NULL;
+	struct addrinfo *search = NULL;
+	struct addrinfo *hintsp;
+	int retval;
+	
+	memset(sadr, '\0', sizeof(*sadr));
+	memset(&hints, '\0', sizeof(hints));
+
+	hintsp = &hints;
+	hintsp->ai_family = family;
+	hintsp->ai_socktype = SOCK_DGRAM;
+	
+	retval = getaddrinfo(s, NULL, hintsp, &res);
+
+	if(!retval)
+	{
+		if(family == AF_UNSPEC)
+		{
+			// Decide here and now which protocol family to use
+			if(net_enabled->integer & NET_PRIOV6)
+			{
+				if(net_enabled->integer & NET_ENABLEV6)
+					search = SearchAddrInfo(res, AF_INET6);
+				
+				if(!search && (net_enabled->integer & NET_ENABLEV4))
+					search = SearchAddrInfo(res, AF_INET);
+			}
+			else
+			{
+				if(net_enabled->integer & NET_ENABLEV4)
+					search = SearchAddrInfo(res, AF_INET);
+				
+				if(!search && (net_enabled->integer & NET_ENABLEV6))
+					search = SearchAddrInfo(res, AF_INET6);
+			}
+		}
+		else
+			search = SearchAddrInfo(res, family);
+
+		if(search)
+		{
+			if(search->ai_addrlen > sadr_len)
+				search->ai_addrlen = sadr_len;
+				
+			memcpy(sadr, search->ai_addr, search->ai_addrlen);
+			freeaddrinfo(search);
+			
+			return qtrue;
+		}
+		else
+			Com_Printf("Sys_StringToSockaddr: Error resolving %s: No address of required type found.\n", s);
+	}
+	else
+		Com_Printf("Sys_StringToSockaddr: Error resolving %s: %s\n", s, gai_strerror(retval));
+	
+	if(res)
+		freeaddrinfo(res);
+	
+	return qfalse;
+}
+
+/*
+=============
+Sys_SockaddrToString
+=============
+*/
+static void Sys_SockaddrToString(char *dest, int destlen, struct sockaddr *input)
+{
+	socklen_t inputlen;
+
+	if (input->sa_family == AF_INET6)
+		inputlen = sizeof(struct sockaddr_in6);
+	else
+		inputlen = sizeof(struct sockaddr_in);
+
+	if(getnameinfo(input, inputlen, dest, destlen, NULL, 0, NI_NUMERICHOST) && destlen > 0)
+		*dest = '\0';
+}
+
+/*
+=============
+Sys_StringToAdr
+=============
+*/
+qboolean Sys_StringToAdr( const char *s, netadr_t *a, netadrtype_t family ) {
+	struct sockaddr_storage sadr;
+	sa_family_t fam;
+	
+	switch(family)
+	{
+		case NA_IP:
+			fam = AF_INET;
+		break;
+		case NA_IP6:
+			fam = AF_INET6;
+		break;
+		default:
+			fam = AF_UNSPEC;
+		break;
+	}
+	if( !Sys_StringToSockaddr(s, (struct sockaddr *) &sadr, sizeof(sadr), fam ) ) {
+		return qfalse;
+	}
+	
+	SockadrToNetadr( (struct sockaddr *) &sadr, a );
+	return qtrue;
+}
+
+/*
+===================
+NET_CompareBaseAdrMask
+
+Compare without port, and up to the bit number given in netmask.
+===================
+*/
+qboolean NET_CompareBaseAdrMask(netadr_t a, netadr_t b, int netmask)
+{
+	qboolean differed;
+	byte cmpmask, *addra, *addrb;
+	int curbyte;
+	
+	if (a.type != b.type)
+		return qfalse;
+
+	if (a.type == NA_LOOPBACK)
+		return qtrue;
+
+	if(a.type == NA_IP)
+	{
+		addra = (byte *) &a.ip;
+		addrb = (byte *) &b.ip;
+		
+		if(netmask < 0 || netmask > 32)
+			netmask = 32;
+	}
+	else if(a.type == NA_IP6)
+	{
+		addra = (byte *) &a.ip6;
+		addrb = (byte *) &b.ip6;
+		
+		if(netmask < 0 || netmask > 128)
+			netmask = 128;
+	}
+	else
+	{
+		Com_Printf ("NET_CompareBaseAdr: bad address type\n");
+		return qfalse;
+	}
+
+	differed = qfalse;
+	curbyte = 0;
+
+	while(netmask > 7)
+	{
+		if(addra[curbyte] != addrb[curbyte])
+		{
+			differed = qtrue;
+			break;
+		}
+
+		curbyte++;
+		netmask -= 8;
+	}
+
+	if(differed)
+		return qfalse;
+
+	if(netmask)
+	{
+		cmpmask = (1 << netmask) - 1;
+		cmpmask <<= 8 - netmask;
+
+		if((addra[curbyte] & cmpmask) == (addrb[curbyte] & cmpmask))
+			return qtrue;
+	}
+	else
+		return qtrue;
+	
+	return qfalse;
+}
+
+
+/*
+===================
+NET_CompareBaseAdr
+
+Compares without the port
+===================
+*/
+qboolean NET_CompareBaseAdr (netadr_t a, netadr_t b)
+{
+	return NET_CompareBaseAdrMask(a, b, -1);
+}
+
+const char	*NET_AdrToString (netadr_t a)
+{
+	static	char	s[NET_ADDRSTRMAXLEN];
+
+	if (a.type == NA_LOOPBACK)
+		Com_sprintf (s, sizeof(s), "loopback");
+	else if (a.type == NA_IP || a.type == NA_IP6)
+	{
+		struct sockaddr_storage sadr;
+	
+		memset(&sadr, 0, sizeof(sadr));
+		NetadrToSockadr(&a, (struct sockaddr *) &sadr);
+		Sys_SockaddrToString(s, sizeof(s), (struct sockaddr *) &sadr);
+	}
+
+	return s;
+}
+
+const char	*NET_AdrToStringwPort (netadr_t a)
+{
+	static	char	s[NET_ADDRSTRMAXLEN];
+
+	if (a.type == NA_LOOPBACK)
+		Com_sprintf (s, sizeof(s), "loopback");
+	else if(a.type == NA_IP)
+		Com_sprintf(s, sizeof(s), "%s:%hu", NET_AdrToString(a), ntohs(a.port));
+	else if(a.type == NA_IP6)
+		Com_sprintf(s, sizeof(s), "[%s]:%hu", NET_AdrToString(a), ntohs(a.port));
+
+	return s;
+}
+
+
+qboolean	NET_CompareAdr (netadr_t a, netadr_t b)
+{
+	if(!NET_CompareBaseAdr(a, b))
+		return qfalse;
+	
+	if (a.type == NA_IP || a.type == NA_IP6)
+	{
+		if (a.port == b.port)
+			return qtrue;
+	}
+	else
+		return qtrue;
+		
+	return qfalse;
+}
+
+
+qboolean	NET_IsLocalAddress( netadr_t adr ) {
+	return adr.type == NA_LOOPBACK;
+}
+
+//=============================================================================
+
+/*
+==================
+NET_GetPacket
+
+Receive one packet
+==================
+*/
+#ifdef _DEBUG
+int	recvfromCount;
+#endif
+
+qboolean NET_GetPacket(netadr_t *net_from, msg_t *net_message, fd_set *fdr)
+{
+	int 	ret;
+	struct sockaddr_storage from;
+	socklen_t	fromlen;
+	int		err;
+
+#ifdef _DEBUG
+	recvfromCount++;		// performance check
+#endif
+	
+	if(ip_socket != INVALID_SOCKET && FD_ISSET(ip_socket, fdr))
+	{
+		fromlen = sizeof(from);
+		ret = recvfrom( ip_socket, (void *)net_message->data, net_message->maxsize, 0, (struct sockaddr *) &from, &fromlen );
+		
+		if (ret == SOCKET_ERROR)
+		{
+			err = socketError;
+
+			if( err != EAGAIN && err != ECONNRESET )
+				Com_Printf( "NET_GetPacket: %s\n", NET_ErrorString() );
+		}
+		else
+		{
+
+			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( (struct sockaddr *) &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;
+		}
+	}
+	
+	if(ip6_socket != INVALID_SOCKET && FD_ISSET(ip6_socket, fdr))
+	{
+		fromlen = sizeof(from);
+		ret = recvfrom(ip6_socket, (void *)net_message->data, net_message->maxsize, 0, (struct sockaddr *) &from, &fromlen);
+		
+		if (ret == SOCKET_ERROR)
+		{
+			err = socketError;
+
+			if( err != EAGAIN && err != ECONNRESET )
+				Com_Printf( "NET_GetPacket: %s\n", NET_ErrorString() );
+		}
+		else
+		{
+			SockadrToNetadr((struct sockaddr *) &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;
+		}
+	}
+
+	if(multicast6_socket != INVALID_SOCKET && multicast6_socket != ip6_socket && FD_ISSET(multicast6_socket, fdr))
+	{
+		fromlen = sizeof(from);
+		ret = recvfrom(multicast6_socket, (void *)net_message->data, net_message->maxsize, 0, (struct sockaddr *) &from, &fromlen);
+		
+		if (ret == SOCKET_ERROR)
+		{
+			err = socketError;
+
+			if( err != EAGAIN && err != ECONNRESET )
+				Com_Printf( "NET_GetPacket: %s\n", NET_ErrorString() );
+		}
+		else
+		{
+			SockadrToNetadr((struct sockaddr *) &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;
+		}
+	}
+	
+	
+	return qfalse;
+}
+
+//=============================================================================
+
+static char socksBuf[4096];
+
+/*
+==================
+Sys_SendPacket
+==================
+*/
+void Sys_SendPacket( int length, const void *data, netadr_t to ) {
+	int				ret = SOCKET_ERROR;
+	struct sockaddr_storage	addr;
+
+	if( to.type != NA_BROADCAST && to.type != NA_IP && to.type != NA_IP6 && to.type != NA_MULTICAST6)
+	{
+		Com_Error( ERR_FATAL, "Sys_SendPacket: bad address type" );
+		return;
+	}
+
+	if( (ip_socket == INVALID_SOCKET && to.type == NA_IP) ||
+		(ip6_socket == INVALID_SOCKET && to.type == NA_IP6) ||
+		(ip6_socket == INVALID_SOCKET && to.type == NA_MULTICAST6) )
+		return;
+
+	if(to.type == NA_MULTICAST6 && (net_enabled->integer & NET_DISABLEMCAST))
+		return;
+
+	memset(&addr, 0, sizeof(addr));
+	NetadrToSockadr( &to, (struct sockaddr *) &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 {
+		if(addr.ss_family == AF_INET)
+			ret = sendto( ip_socket, data, length, 0, (struct sockaddr *) &addr, sizeof(struct sockaddr_in) );
+		else if(addr.ss_family == AF_INET6)
+			ret = sendto( ip6_socket, data, length, 0, (struct sockaddr *) &addr, sizeof(struct sockaddr_in6) );
+	}
+	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		index, run, addrsize;
+	qboolean differed;
+	byte *compareadr, *comparemask, *compareip;
+
+	if( adr.type == NA_LOOPBACK ) {
+		return qtrue;
+	}
+
+	if( adr.type == NA_IP )
+	{
+		// 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;
+
+		if(adr.ip[0] == 127)
+			return qtrue;
+	}
+	else if(adr.type == NA_IP6)
+	{
+		if(adr.ip6[0] == 0xfe && (adr.ip6[1] & 0xc0) == 0x80)
+			return qtrue;
+		if((adr.ip6[0] & 0xfe) == 0xfc)
+			return qtrue;
+	}
+	
+	// Now compare against the networks this computer is member of.
+	for(index = 0; index < numIP; index++)
+	{
+		if(localIP[index].type == adr.type)
+		{
+			if(adr.type == NA_IP)
+			{
+				compareip = (byte *) &((struct sockaddr_in *) &localIP[index].addr)->sin_addr.s_addr;
+				comparemask = (byte *) &((struct sockaddr_in *) &localIP[index].netmask)->sin_addr.s_addr;
+				compareadr = adr.ip;
+				
+				addrsize = sizeof(adr.ip);
+			}
+			else
+			{
+				// TODO? should we check the scope_id here?
+
+				compareip = (byte *) &((struct sockaddr_in6 *) &localIP[index].addr)->sin6_addr;
+				comparemask = (byte *) &((struct sockaddr_in6 *) &localIP[index].netmask)->sin6_addr;
+				compareadr = adr.ip6;
+				
+				addrsize = sizeof(adr.ip6);
+			}
+
+			differed = qfalse;
+			for(run = 0; run < addrsize; run++)
+			{
+				if((compareip[run] & comparemask[run]) != (compareadr[run] & comparemask[run]))
+				{
+					differed = qtrue;
+					break;
+				}
+			}
+			
+			if(!differed)
+				return qtrue;
+
+		}
+	}
+	
+	return qfalse;
+}
+
+/*
+==================
+Sys_ShowIP
+==================
+*/
+void Sys_ShowIP(void) {
+	int i;
+	char addrbuf[NET_ADDRSTRMAXLEN];
+
+	for(i = 0; i < numIP; i++)
+	{
+		Sys_SockaddrToString(addrbuf, sizeof(addrbuf), (struct sockaddr *) &localIP[i].addr);
+
+		if(localIP[i].type == NA_IP)
+			Com_Printf( "IP: %s\n", addrbuf);
+		else if(localIP[i].type == NA_IP6)
+			Com_Printf( "IP6: %s\n", addrbuf);
+	}
+}
+
+
+//=============================================================================
+
+
+/*
+====================
+NET_IPSocket
+====================
+*/
+int NET_IPSocket( char *net_interface, int port, int *err ) {
+	SOCKET				newsocket;
+	struct sockaddr_in	address;
+	ioctlarg_t			_true = 1;
+	int					i = 1;
+
+	*err = 0;
+
+	if( net_interface ) {
+		Com_Printf( "Opening IP socket: %s:%i\n", net_interface, port );
+	}
+	else {
+		Com_Printf( "Opening IP socket: 0.0.0.0:%i\n", port );
+	}
+
+	if( ( newsocket = socket( PF_INET, SOCK_DGRAM, IPPROTO_UDP ) ) == INVALID_SOCKET ) {
+		*err = socketError;
+		Com_Printf( "WARNING: NET_IPSocket: socket: %s\n", NET_ErrorString() );
+		return newsocket;
+	}
+	// make it non-blocking
+	if( ioctlsocket( newsocket, FIONBIO, &_true ) == SOCKET_ERROR ) {
+		Com_Printf( "WARNING: NET_IPSocket: ioctl FIONBIO: %s\n", NET_ErrorString() );
+		*err = socketError;
+		closesocket(newsocket);
+		return INVALID_SOCKET;
+	}
+
+	// make it broadcast capable
+	if( setsockopt( newsocket, SOL_SOCKET, SO_BROADCAST, (char *) &i, sizeof(i) ) == SOCKET_ERROR ) {
+		Com_Printf( "WARNING: NET_IPSocket: setsockopt SO_BROADCAST: %s\n", NET_ErrorString() );
+	}
+
+	if( !net_interface || !net_interface[0]) {
+		address.sin_family = AF_INET;
+		address.sin_addr.s_addr = INADDR_ANY;
+	}
+	else
+	{
+		if(!Sys_StringToSockaddr( net_interface, (struct sockaddr *)&address, sizeof(address), AF_INET))
+		{
+			closesocket(newsocket);
+			return INVALID_SOCKET;
+		}
+	}
+
+	if( port == PORT_ANY ) {
+		address.sin_port = 0;
+	}
+	else {
+		address.sin_port = htons( (short)port );
+	}
+
+	if( bind( newsocket, (void *)&address, sizeof(address) ) == SOCKET_ERROR ) {
+		Com_Printf( "WARNING: NET_IPSocket: bind: %s\n", NET_ErrorString() );
+		*err = socketError;
+		closesocket( newsocket );
+		return INVALID_SOCKET;
+	}
+
+	return newsocket;
+}
+
+/*
+====================
+NET_IP6Socket
+====================
+*/
+int NET_IP6Socket( char *net_interface, int port, struct sockaddr_in6 *bindto, int *err ) {
+	SOCKET				newsocket;
+	struct sockaddr_in6	address;
+	ioctlarg_t			_true = 1;
+
+	*err = 0;
+
+	if( net_interface )
+	{
+		// Print the name in brackets if there is a colon:
+		if(Q_CountChar(net_interface, ':'))
+			Com_Printf( "Opening IP6 socket: [%s]:%i\n", net_interface, port );
+		else
+			Com_Printf( "Opening IP6 socket: %s:%i\n", net_interface, port );
+	}
+	else
+		Com_Printf( "Opening IP6 socket: [::]:%i\n", port );
+
+	if( ( newsocket = socket( PF_INET6, SOCK_DGRAM, IPPROTO_UDP ) ) == INVALID_SOCKET ) {
+		*err = socketError;
+		Com_Printf( "WARNING: NET_IP6Socket: socket: %s\n", NET_ErrorString() );
+		return newsocket;
+	}
+
+	// make it non-blocking
+	if( ioctlsocket( newsocket, FIONBIO, &_true ) == SOCKET_ERROR ) {
+		Com_Printf( "WARNING: NET_IP6Socket: ioctl FIONBIO: %s\n", NET_ErrorString() );
+		*err = socketError;
+		closesocket(newsocket);
+		return INVALID_SOCKET;
+	}
+
+#ifdef IPV6_V6ONLY
+	{
+		int i = 1;
+
+		// ipv4 addresses should not be allowed to connect via this socket.
+		if(setsockopt(newsocket, IPPROTO_IPV6, IPV6_V6ONLY, (char *) &i, sizeof(i)) == SOCKET_ERROR)
+		{
+			// win32 systems don't seem to support this anyways.
+			Com_DPrintf("WARNING: NET_IP6Socket: setsockopt IPV6_V6ONLY: %s\n", NET_ErrorString());
+		}
+	}
+#endif
+
+	if( !net_interface || !net_interface[0]) {
+		address.sin6_family = AF_INET6;
+		address.sin6_addr = in6addr_any;
+	}
+	else
+	{
+		if(!Sys_StringToSockaddr( net_interface, (struct sockaddr *)&address, sizeof(address), AF_INET6))
+		{
+			closesocket(newsocket);
+			return INVALID_SOCKET;
+		}
+	}
+
+	if( port == PORT_ANY ) {
+		address.sin6_port = 0;
+	}
+	else {
+		address.sin6_port = htons( (short)port );
+	}
+
+	if( bind( newsocket, (void *)&address, sizeof(address) ) == SOCKET_ERROR ) {
+		Com_Printf( "WARNING: NET_IP6Socket: bind: %s\n", NET_ErrorString() );
+		*err = socketError;
+		closesocket( newsocket );
+		return INVALID_SOCKET;
+	}
+	
+	if(bindto)
+		*bindto = address;
+
+	return newsocket;
+}
+
+/*
+====================
+NET_SetMulticast
+Set the current multicast group
+====================
+*/
+void NET_SetMulticast6(void)
+{
+	struct sockaddr_in6 addr;
+
+	if(!*net_mcast6addr->string || !Sys_StringToSockaddr(net_mcast6addr->string, (struct sockaddr *) &addr, sizeof(addr), AF_INET6))
+	{
+		Com_Printf("WARNING: NET_JoinMulticast6: Incorrect multicast address given, "
+			   "please set cvar %s to a sane value.\n", net_mcast6addr->name);
+		
+		Cvar_SetValue(net_enabled->name, net_enabled->integer | NET_DISABLEMCAST);
+		
+		return;
+	}
+	
+	memcpy(&curgroup.ipv6mr_multiaddr, &addr.sin6_addr, sizeof(curgroup.ipv6mr_multiaddr));
+
+	if(*net_mcast6iface->string)
+	{
+#ifdef _WIN32
+		curgroup.ipv6mr_interface = net_mcast6iface->integer;
+#else
+		curgroup.ipv6mr_interface = if_nametoindex(net_mcast6iface->string);
+#endif
+	}
+	else
+		curgroup.ipv6mr_interface = 0;
+}
+
+/*
+====================
+NET_JoinMulticast
+Join an ipv6 multicast group
+====================
+*/
+void NET_JoinMulticast6(void)
+{
+	int err;
+	
+	if(ip6_socket == INVALID_SOCKET || multicast6_socket != INVALID_SOCKET || (net_enabled->integer & NET_DISABLEMCAST))
+		return;
+	
+	if(IN6_IS_ADDR_MULTICAST(&boundto.sin6_addr) || IN6_IS_ADDR_UNSPECIFIED(&boundto.sin6_addr))
+	{
+		// The way the socket was bound does not prohibit receiving multi-cast packets. So we don't need to open a new one.
+		multicast6_socket = ip6_socket;
+	}
+	else
+	{
+		if((multicast6_socket = NET_IP6Socket(net_mcast6addr->string, ntohs(boundto.sin6_port), NULL, &err)) == INVALID_SOCKET)
+		{
+			// If the OS does not support binding to multicast addresses, like WinXP, at least try with the normal file descriptor.
+			multicast6_socket = ip6_socket;
+		}
+	}
+	
+	if(curgroup.ipv6mr_interface)
+	{
+		if (setsockopt(multicast6_socket, IPPROTO_IPV6, IPV6_MULTICAST_IF,
+					(char *) &curgroup.ipv6mr_interface, sizeof(curgroup.ipv6mr_interface)) < 0)
+		{
+			Com_Printf("NET_JoinMulticast6: Couldn't set scope on multicast socket: %s\n", NET_ErrorString());
+
+			if(multicast6_socket != ip6_socket)
+			{
+				closesocket(multicast6_socket);
+				multicast6_socket = INVALID_SOCKET;
+				return;
+			}
+		}
+	}
+
+	if (setsockopt(multicast6_socket, IPPROTO_IPV6, IPV6_JOIN_GROUP, (char *) &curgroup, sizeof(curgroup)))
+	{
+		Com_Printf("NET_JoinMulticast6: Couldn't join multicast group: %s\n", NET_ErrorString());
+
+		if(multicast6_socket != ip6_socket)
+		{
+			closesocket(multicast6_socket);
+			multicast6_socket = INVALID_SOCKET;
+			return;
+		}
+	}
+}
+
+void NET_LeaveMulticast6()
+{
+	if(multicast6_socket != INVALID_SOCKET)
+	{
+		if(multicast6_socket != ip6_socket)
+			closesocket(multicast6_socket);
+		else
+			setsockopt(multicast6_socket, IPPROTO_IPV6, IPV6_LEAVE_GROUP, (char *) &curgroup, sizeof(curgroup));
+
+		multicast6_socket = INVALID_SOCKET;
+	}
+}
+
+/*
+====================
+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, (void *)buf, len, 0 ) == SOCKET_ERROR ) {
+		err = socketError;
+		Com_Printf( "NET_OpenSocks: send: %s\n", NET_ErrorString() );
+		return;
+	}
+
+	// get the response
+	len = recv( socks_socket, (void *)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, (void *)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, (void *)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, (void *)buf, 10, 0 ) == SOCKET_ERROR ) {
+		err = socketError;
+		Com_Printf( "NET_OpenSocks: send: %s\n", NET_ErrorString() );
+		return;
+	}
+
+	// get the response
+	len = recv( socks_socket, (void *)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_AddLocalAddress
+=====================
+*/
+static void NET_AddLocalAddress(char *ifname, struct sockaddr *addr, struct sockaddr *netmask)
+{
+	int addrlen;
+	sa_family_t family;
+	
+	// only add addresses that have all required info.
+	if(!addr || !netmask || !ifname)
+		return;
+	
+	family = addr->sa_family;
+
+	if(numIP < MAX_IPS)
+	{
+		if(family == AF_INET)
+		{
+			addrlen = sizeof(struct sockaddr_in);
+			localIP[numIP].type = NA_IP;
+		}
+		else if(family == AF_INET6)
+		{
+			addrlen = sizeof(struct sockaddr_in6);
+			localIP[numIP].type = NA_IP6;
+		}
+		else
+			return;
+		
+		Q_strncpyz(localIP[numIP].ifname, ifname, sizeof(localIP[numIP].ifname));
+	
+		localIP[numIP].family = family;
+
+		memcpy(&localIP[numIP].addr, addr, addrlen);
+		memcpy(&localIP[numIP].netmask, netmask, addrlen);
+		
+		numIP++;
+	}
+}
+
+#if defined(__linux__) || defined(MACOSX) || defined(__BSD__)
+static void NET_GetLocalAddress(void)
+{
+	struct ifaddrs *ifap, *search;
+
+	if(getifaddrs(&ifap))
+		Com_Printf("NET_GetLocalAddress: Unable to get list of network interfaces: %s\n", NET_ErrorString());
+	else
+	{
+		for(search = ifap; search; search = search->ifa_next)
+		{
+			// Only add interfaces that are up.
+			if(ifap->ifa_flags & IFF_UP)
+				NET_AddLocalAddress(search->ifa_name, search->ifa_addr, search->ifa_netmask);
+		}
+	
+		freeifaddrs(ifap);
+		
+		Sys_ShowIP();
+	}
+}
+#else
+static void NET_GetLocalAddress( void ) {
+	char				hostname[256];
+	struct addrinfo	hint;
+	struct addrinfo	*res = NULL;
+
+	if(gethostname( hostname, 256 ) == SOCKET_ERROR)
+		return;
+
+	Com_Printf( "Hostname: %s\n", hostname );
+	
+	memset(&hint, 0, sizeof(hint));
+	
+	hint.ai_family = AF_UNSPEC;
+	hint.ai_socktype = SOCK_DGRAM;
+	
+	if(!getaddrinfo(hostname, NULL, &hint, &res))
+	{
+		struct sockaddr_in mask4;
+		struct sockaddr_in6 mask6;
+		struct addrinfo *search;
+	
+		/* On operating systems where it's more difficult to find out the configured interfaces, we'll just assume a
+		 * netmask with all bits set. */
+	
+		memset(&mask4, 0, sizeof(mask4));
+		memset(&mask6, 0, sizeof(mask6));
+		mask4.sin_family = AF_INET;
+		memset(&mask4.sin_addr.s_addr, 0xFF, sizeof(mask4.sin_addr.s_addr));
+		mask6.sin6_family = AF_INET6;
+		memset(&mask6.sin6_addr, 0xFF, sizeof(mask6.sin6_addr));
+
+		// add all IPs from returned list.
+		for(search = res; search; search = search->ai_next)
+		{
+			if(search->ai_family == AF_INET)
+				NET_AddLocalAddress("", search->ai_addr, (struct sockaddr *) &mask4);
+			else if(search->ai_family == AF_INET6)
+				NET_AddLocalAddress("", search->ai_addr, (struct sockaddr *) &mask6);
+		}
+	
+		Sys_ShowIP();
+	}
+	
+	if(res)
+		freeaddrinfo(res);
+}
+#endif
+
+/*
+====================
+NET_OpenIP
+====================
+*/
+void NET_OpenIP( void ) {
+	int		i;
+	int		err;
+	int		port;
+	int		port6;
+
+	port = net_port->integer;
+	port6 = net_port6->integer;
+
+	NET_GetLocalAddress();
+
+	// automatically scan for a valid port, so multiple
+	// dedicated servers can be started without requiring
+	// a different net_port for each one
+
+	if(net_enabled->integer & NET_ENABLEV6)
+	{
+		for( i = 0 ; i < 10 ; i++ )
+		{
+			ip6_socket = NET_IP6Socket(net_ip6->string, port6 + i, &boundto, &err);
+			if (ip6_socket != INVALID_SOCKET)
+			{
+				Cvar_SetValue( "net_port6", port6 + i );
+				break;
+			}
+			else
+			{
+				if(err == EAFNOSUPPORT)
+					break;
+			}
+		}
+		if(ip6_socket == INVALID_SOCKET)
+			Com_Printf( "WARNING: Couldn't bind to a v6 ip address.\n");
+	}
+
+	if(net_enabled->integer & NET_ENABLEV4)
+	{
+		for( i = 0 ; i < 10 ; i++ ) {
+			ip_socket = NET_IPSocket( net_ip->string, port + i, &err );
+			if (ip_socket != INVALID_SOCKET) {
+				Cvar_SetValue( "net_port", port + i );
+
+				if (net_socksEnabled->integer)
+					NET_OpenSocks( port + i );
+
+				break;
+			}
+			else
+			{
+				if(err == EAFNOSUPPORT)
+					break;
+			}
+		}
+		
+		if(ip_socket == INVALID_SOCKET)
+			Com_Printf( "WARNING: Couldn't bind to a v4 ip address.\n");
+	}
+}
+
+
+//===================================================================
+
+
+/*
+====================
+NET_GetCvars
+====================
+*/
+static qboolean NET_GetCvars( void ) {
+	int modified;
+
+#ifdef DEDICATED
+	// I want server owners to explicitly turn on ipv6 support.
+	net_enabled = Cvar_Get( "net_enabled", "1", CVAR_LATCH | CVAR_ARCHIVE );
+#else
+	/* End users have it enabled so they can connect to ipv6-only hosts, but ipv4 will be
+	 * used if available due to ping */
+	net_enabled = Cvar_Get( "net_enabled", "3", CVAR_LATCH | CVAR_ARCHIVE );
+#endif
+	modified = net_enabled->modified;
+	net_enabled->modified = qfalse;
+
+	net_ip = Cvar_Get( "net_ip", "0.0.0.0", CVAR_LATCH );
+	modified += net_ip->modified;
+	net_ip->modified = qfalse;
+	
+	net_ip6 = Cvar_Get( "net_ip6", "::", CVAR_LATCH );
+	modified += net_ip6->modified;
+	net_ip6->modified = qfalse;
+	
+	net_port = Cvar_Get( "net_port", va( "%i", PORT_SERVER ), CVAR_LATCH );
+	modified += net_port->modified;
+	net_port->modified = qfalse;
+	
+	net_port6 = Cvar_Get( "net_port6", va( "%i", PORT_SERVER ), CVAR_LATCH );
+	modified += net_port6->modified;
+	net_port6->modified = qfalse;
+
+	// Some cvars for configuring multicast options which facilitates scanning for servers on local subnets.
+	net_mcast6addr = Cvar_Get( "net_mcast6addr", NET_MULTICAST_IP6, CVAR_LATCH | CVAR_ARCHIVE );
+	modified += net_mcast6addr->modified;
+	net_mcast6addr->modified = qfalse;
+
+#ifdef _WIN32
+	net_mcast6iface = Cvar_Get( "net_mcast6iface", "0", CVAR_LATCH | CVAR_ARCHIVE );
+#else
+	net_mcast6iface = Cvar_Get( "net_mcast6iface", "", CVAR_LATCH | CVAR_ARCHIVE );
+#endif
+	modified += net_mcast6iface->modified;
+	net_mcast6iface->modified = qfalse;
+
+	net_socksEnabled = Cvar_Get( "net_socksEnabled", "0", CVAR_LATCH | CVAR_ARCHIVE );
+	modified += net_socksEnabled->modified;
+	net_socksEnabled->modified = qfalse;
+
+	net_socksServer = Cvar_Get( "net_socksServer", "", CVAR_LATCH | CVAR_ARCHIVE );
+	modified += net_socksServer->modified;
+	net_socksServer->modified = qfalse;
+
+	net_socksPort = Cvar_Get( "net_socksPort", "1080", CVAR_LATCH | CVAR_ARCHIVE );
+	modified += net_socksPort->modified;
+	net_socksPort->modified = qfalse;
+
+	net_socksUsername = Cvar_Get( "net_socksUsername", "", CVAR_LATCH | CVAR_ARCHIVE );
+	modified += net_socksUsername->modified;
+	net_socksUsername->modified = qfalse;
+
+	net_socksPassword = Cvar_Get( "net_socksPassword", "", CVAR_LATCH | CVAR_ARCHIVE );
+	modified += net_socksPassword->modified;
+	net_socksPassword->modified = qfalse;
+
+	net_dropsim = Cvar_Get("net_dropsim", "", CVAR_TEMP);
+
+	return modified ? qtrue : qfalse;
+}
+
+
+/*
+====================
+NET_Config
+====================
+*/
+void NET_Config( qboolean enableNetworking ) {
+	qboolean	modified;
+	qboolean	stop;
+	qboolean	start;
+
+	// get any latched changes to cvars
+	modified = NET_GetCvars();
+
+	if( !net_enabled->integer ) {
+		enableNetworking = 0;
+	}
+
+	// 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 != INVALID_SOCKET ) {
+			closesocket( ip_socket );
+			ip_socket = INVALID_SOCKET;
+		}
+
+		if(multicast6_socket)
+		{
+			if(multicast6_socket != ip6_socket)
+				closesocket(multicast6_socket);
+				
+			multicast6_socket = INVALID_SOCKET;
+		}
+
+		if ( ip6_socket != INVALID_SOCKET ) {
+			closesocket( ip6_socket );
+			ip6_socket = INVALID_SOCKET;
+		}
+
+		if ( socks_socket != INVALID_SOCKET ) {
+			closesocket( socks_socket );
+			socks_socket = INVALID_SOCKET;
+		}
+		
+	}
+
+	if( start )
+	{
+		if (net_enabled->integer)
+		{
+			NET_OpenIP();
+			NET_SetMulticast6();
+		}
+	}
+}
+
+
+/*
+====================
+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
+
+	NET_Config( qtrue );
+	
+	Cmd_AddCommand ("net_restart", NET_Restart_f);
+}
+
+
+/*
+====================
+NET_Shutdown
+====================
+*/
+void NET_Shutdown( void ) {
+	if ( !networkingEnabled ) {
+		return;
+	}
+
+	NET_Config( qfalse );
+
+#ifdef _WIN32
+	WSACleanup();
+	winsockInitialized = qfalse;
+#endif
+}
+
+/*
+====================
+NET_Event
+
+Called from NET_Sleep which uses select() to determine which sockets have seen action.
+====================
+*/
+
+void NET_Event(fd_set *fdr)
+{
+	byte bufData[MAX_MSGLEN + 1];
+	netadr_t from;
+	msg_t netmsg;
+	
+	while(1)
+	{
+		MSG_Init(&netmsg, bufData, sizeof(bufData));
+
+		if(NET_GetPacket(&from, &netmsg, fdr))
+		{
+			if(net_dropsim->value > 0.0f && net_dropsim->value <= 100.0f)
+			{
+				// com_dropsim->value percent of incoming packets get dropped.
+				if(rand() < (int) (((double) RAND_MAX) / 100.0 * (double) net_dropsim->value))
+					continue;          // drop this packet
+                        }
+
+			if(com_sv_running->integer)
+				Com_RunAndTimeServerPacket(&from, &netmsg);
+			else
+				CL_PacketEvent(from, &netmsg);
+		}
+		else
+			break;
+	}
+}
+
+/*
+====================
+NET_Sleep
+
+Sleeps msec or until something happens on the network
+====================
+*/
+void NET_Sleep(int msec)
+{
+	struct timeval timeout;
+	fd_set fdr;
+	int highestfd = -1, retval;
+
+	FD_ZERO(&fdr);
+
+	if(ip_socket != INVALID_SOCKET)
+	{
+		FD_SET(ip_socket, &fdr);
+
+		highestfd = ip_socket;
+	}
+	if(ip6_socket != INVALID_SOCKET)
+	{
+		FD_SET(ip6_socket, &fdr);
+		
+		if(ip6_socket > highestfd)
+			highestfd = ip6_socket;
+	}
+
+	timeout.tv_sec = msec/1000;
+	timeout.tv_usec = (msec%1000)*1000;
+	
+#ifdef _WIN32
+	if(highestfd < 0)
+	{
+		// windows ain't happy when select is called without valid FDs
+		SleepEx(msec, 0);
+		return;
+	}
+#endif
+
+	retval = select(highestfd + 1, &fdr, NULL, NULL, &timeout);
+	
+	if(retval < 0)
+		Com_Printf("Warning: select() syscall failed: %s\n", NET_ErrorString());
+	else if(retval > 0)
+		NET_Event(&fdr);
+}
+
+/*
+====================
+NET_Restart_f
+====================
+*/
+void NET_Restart_f( void ) {
+	NET_Config( networkingEnabled );
+}