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rallyunlimited-engine/code/qcommon/net_ip.c
CuteNoiRe 8c56f85692 initial commit
2024-02-02 19:46:17 +03:00

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/*
===========================================================================
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 <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 // WINVER >= 0x501
#if 1 // Windows2000 compatibility
# include <ws2tcpip.h>
# include <wspiapi.h>
#else
# include <ws2spi.h>
#endif
#endif // WINVER >= 0x501
typedef int socklen_t;
# ifdef ADDRESS_FAMILY
# define sa_family_t ADDRESS_FAMILY
# else
typedef unsigned short sa_family_t;
# endif
# undef EAGAIN
# undef EADDRNOTAVAIL
# undef EAFNOSUPPORT
# undef ECONNRESET
# 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 // !_WIN32
# if MAC_OS_X_VERSION_MIN_REQUIRED == 1020
// needed for socklen_t on OSX 10.2
# define _BSD_SOCKLEN_T_
# endif
# include <sys/socket.h>
# include <errno.h>
# include <netdb.h>
# include <netinet/in.h>
# include <arpa/inet.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
typedef union {
struct sockaddr_in v4;
struct sockaddr_in6 v6;
struct sockaddr_storage ss;
} sockaddr_t;
#pragma pack(push,1)
typedef struct socks5_request_s {
uint8_t version;
uint8_t command;
uint8_t reserved;
uint8_t addrtype;
union {
struct {
struct in_addr addr;
uint16_t port;
} v4;
#ifdef USE_IPV6
struct {
struct in6_addr addr;
uint16_t port;
} v6;
#endif
byte buffer[64];
} u;
} socks5_request_t;
typedef union socks5_udp_request_s {
struct {
uint8_t reserved[2];
uint8_t fragnum;
uint8_t addrtype;
union {
struct {
struct in_addr addr;
uint16_t port;
char data[2000];
} v4;
#ifdef USE_IPV6
struct {
struct in6_addr addr;
uint16_t port;
char data[2000];
} v6;
#endif
} u;
} s;
char buf[1];
} socks5_udp_request_t;
#pragma pack(pop)
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_port;
#ifdef USE_IPV6
static cvar_t *net_ip6;
static cvar_t *net_port6;
static cvar_t *net_mcast6addr;
static cvar_t *net_mcast6iface;
#endif
static cvar_t *net_dropsim;
static sockaddr_t socksRelayAddr;
static SOCKET ip_socket = INVALID_SOCKET;
static SOCKET socks_socket = INVALID_SOCKET;
#ifdef USE_IPV6
static SOCKET ip6_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;
#endif
#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;
sockaddr_t addr;
sockaddr_t netmask;
} nip_localaddr_t;
static nip_localaddr_t localIP[MAX_IPS];
static int numIP;
static void NET_Restart_f( void );
//=============================================================================
/*
====================
NET_ErrorString
====================
*/
static 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( const netadr_t *a, sockaddr_t *s ) {
switch ( a->type ) {
case NA_BROADCAST:
s->v4.sin_family = AF_INET;
s->v4.sin_port = a->port;
s->v4.sin_addr.s_addr = INADDR_BROADCAST;
break;
case NA_IP:
s->v4.sin_family = AF_INET;
memcpy( &s->v4.sin_addr.s_addr, a->ipv._4, sizeof( s->v4.sin_addr.s_addr ) );
s->v4.sin_port = a->port;
break;
#ifdef USE_IPV6
case NA_IP6:
s->v6.sin6_family = AF_INET6;
memcpy( &s->v6.sin6_addr, a->ipv._6, sizeof( s->v6.sin6_addr ) );
s->v6.sin6_port = a->port;
s->v6.sin6_scope_id = a->scope_id;
break;
case NA_MULTICAST6:
s->v6.sin6_family = AF_INET6;
s->v6.sin6_addr = curgroup.ipv6mr_multiaddr;
s->v6.sin6_port = a->port;
break;
#endif
default:
s->v4.sin_family = AF_UNSPEC;
s->v4.sin_port = 0;
s->v4.sin_addr.s_addr = INADDR_ANY;
break;
}
}
static void SockadrToNetadr( const sockaddr_t *s, netadr_t *a ) {
if ( s->ss.ss_family == AF_INET ) {
a->type = NA_IP;
memcpy( a->ipv._4, &s->v4.sin_addr.s_addr, sizeof( a->ipv._4 ) );
a->port = s->v4.sin_port;
}
#ifdef USE_IPV6
else if ( s->ss.ss_family == AF_INET6 ) {
a->type = NA_IP6;
memcpy( a->ipv._6, &s->v6.sin6_addr, sizeof( a->ipv._6 ) );
a->port = s->v6.sin6_port;
a->scope_id = (uint32_t)s->v6.sin6_scope_id;
}
#endif
}
static const struct addrinfo *SearchAddrInfo( const struct addrinfo *hints, sa_family_t family )
{
while ( hints )
{
if ( hints->ai_family == family )
return hints;
hints = hints->ai_next;
}
return NULL;
}
/*
=============
gai_error_str
wrapper over gai_strerror() to describe common error code(s)
because in-game console can't properly render non-ascii characters
on systems with locales other than US/UK
=============
*/
static const char *gai_error_str( int ecode )
{
switch ( ecode )
{
case EAI_NONAME:
return "Unknown host.";
default:
return gai_strerror( ecode );
}
}
/*
=============
Sys_StringToSockaddr
=============
*/
static qboolean Sys_StringToSockaddr( const char *s, sockaddr_t *sadr, int sadr_len, sa_family_t family, int type )
{
struct addrinfo hint;
struct addrinfo *res = NULL;
int retval;
memset( sadr, 0x0, sadr_len );
memset( &hint, 0x0, sizeof( hint ) );
hint.ai_family = family;
hint.ai_socktype = type;
retval = getaddrinfo( s, NULL, &hint, &res );
if ( retval == 0 )
{
const struct addrinfo *search = NULL;
if ( family == AF_UNSPEC )
{
// Decide here and now which protocol family to use
#ifdef USE_IPV6
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
#endif
{
if ( net_enabled->integer & NET_ENABLEV4 )
search = SearchAddrInfo( res, AF_INET );
#ifdef USE_IPV6
if ( !search && ( net_enabled->integer & NET_ENABLEV6 ) )
search = SearchAddrInfo( res, AF_INET6 );
#endif
}
}
else
search = SearchAddrInfo( res, family );
if ( search )
{
size_t addrlen = MIN( search->ai_addrlen, sadr_len );
memcpy ( sadr, search->ai_addr, addrlen );
freeaddrinfo( res );
return qtrue;
}
else
Com_Printf( "%s: Error resolving %s: No address of required type found.\n", __func__, s );
}
else
Com_Printf( "%s: Error resolving %s: %s\n", __func__, s, gai_error_str( retval ) );
if ( res )
freeaddrinfo( res );
return qfalse;
}
/*
=============
Sys_SockaddrToString
=============
*/
static void Sys_SockaddrToString( char *dest, int destlen, const sockaddr_t *input )
{
socklen_t inputlen;
#ifdef USE_IPV6
if ( input->ss.ss_family == AF_INET6 )
inputlen = sizeof(struct sockaddr_in6);
else
#endif
inputlen = sizeof(struct sockaddr_in);
if ( getnameinfo( (const struct sockaddr *)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 ) {
sockaddr_t sadr;
sa_family_t fam;
switch(family)
{
case NA_IP:
fam = AF_INET;
break;
#ifdef USE_IPV6
case NA_IP6:
fam = AF_INET6;
break;
#endif
default:
fam = AF_UNSPEC;
break;
}
if ( !Sys_StringToSockaddr( s, &sadr, sizeof( sadr ), fam, SOCK_DGRAM ) ) {
return qfalse;
}
SockadrToNetadr( &sadr, a );
return qtrue;
}
/*
===================
NET_CompareBaseAdrMask
Compare without port, and up to the bit number given in netmask.
===================
*/
qboolean NET_CompareBaseAdrMask( const netadr_t *a, const netadr_t *b, unsigned int netmask )
{
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->ipv._4;
addrb = (byte *) &b->ipv._4;
if (netmask > 32)
netmask = 32;
}
#ifdef USE_IPV6
else if (a->type == NA_IP6)
{
addra = (byte *) &a->ipv._6;
addrb = (byte *) &b->ipv._6;
if (netmask > 128)
netmask = 128;
}
#endif
else
{
Com_Printf ("%s: bad address type\n", __func__);
return qfalse;
}
curbyte = netmask >> 3;
if(curbyte && memcmp(addra, addrb, curbyte))
return qfalse;
netmask &= 0x07;
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( const netadr_t *a, const netadr_t *b )
{
return NET_CompareBaseAdrMask( a, b, ~0U );
}
const char *NET_AdrToString( const netadr_t *a )
{
static char s[NET_ADDRSTRMAXLEN];
if (a->type == NA_LOOPBACK)
strcpy( s, "loopback" );
else if (a->type == NA_BOT)
strcpy( s, "bot" );
#ifdef USE_IPV6
else if (a->type == NA_IP || a->type == NA_IP6)
#else
else if (a->type == NA_IP)
#endif
{
sockaddr_t sadr;
NetadrToSockadr( a, &sadr );
Sys_SockaddrToString( s, sizeof(s), &sadr );
}
return s;
}
const char *NET_AdrToStringwPort( const netadr_t *a )
{
static char s[NET_ADDRSTRMAXLEN];
if (a->type == NA_LOOPBACK)
strcpy( s, "loopback" );
else if (a->type == NA_BOT)
strcpy( s, "bot" );
else if(a->type == NA_IP)
Com_sprintf(s, sizeof(s), "%s:%hu", NET_AdrToString(a), ntohs(a->port));
#ifdef USE_IPV6
else if(a->type == NA_IP6)
Com_sprintf(s, sizeof(s), "[%s]:%hu", NET_AdrToString(a), ntohs(a->port));
#endif
return s;
}
qboolean NET_CompareAdr( const netadr_t *a, const netadr_t *b )
{
if ( !NET_CompareBaseAdr( a, b ) )
return qfalse;
#ifdef USE_IPV6
if (a->type == NA_IP || a->type == NA_IP6)
#else
if (a->type == NA_IP)
#endif
{
if (a->port == b->port)
return qtrue;
}
else
return qtrue;
return qfalse;
}
qboolean NET_IsLocalAddress( const netadr_t *adr )
{
return adr->type == NA_LOOPBACK;
}
//=============================================================================
/*
==================
NET_GetPacket
Receive one packet
==================
*/
static qboolean NET_GetPacket( netadr_t *net_from, msg_t *net_message, const fd_set *fdr )
{
int ret;
sockaddr_t from;
socklen_t fromlen;
int err;
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( &from.v4.sin_zero, 0, sizeof( from.v4.sin_zero ) );
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->ipv._4[0] = net_message->data[4];
net_from->ipv._4[1] = net_message->data[5];
net_from->ipv._4[2] = net_message->data[6];
net_from->ipv._4[3] = net_message->data[7];
net_from->port = *(uint16_t *)&net_message->data[8];
net_message->readcount = 10;
}
else {
net_from->type = NA_BAD;
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;
}
}
#ifdef USE_IPV6
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
{
net_from->type = NA_BAD;
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;
}
}
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
{
net_from->type = NA_BAD;
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;
}
}
#endif // USE_IPV6
return qfalse;
}
//=============================================================================
/*
==================
Sys_SendPacket
==================
*/
void Sys_SendPacket( int length, const void *data, const netadr_t *to ) {
int ret = SOCKET_ERROR;
sockaddr_t addr;
switch ( to->type ) {
case NA_BROADCAST:
case NA_IP:
#ifdef USE_IPV6
case NA_IP6:
case NA_MULTICAST6:
#endif
break;
default:
Com_Error( ERR_FATAL, "Sys_SendPacket: bad address type %i", to->type );
return;
}
#ifdef USE_IPV6
if( (ip_socket == INVALID_SOCKET && to->type == NA_IP) ||
(ip_socket == INVALID_SOCKET && to->type == NA_BROADCAST) ||
(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;
#else
if ( ip_socket == INVALID_SOCKET && ( to->type == NA_IP || to->type == NA_BROADCAST ) )
return;
#endif
NetadrToSockadr( to, &addr );
if ( usingSocks && to->type == NA_IP ) {
socks5_udp_request_t cmd;
if ( length <= sizeof( cmd.s.u.v4.data ) ) {
cmd.s.reserved[0] = 0;
cmd.s.reserved[1] = 0;
cmd.s.fragnum = 0; // not fragmented
cmd.s.addrtype = 1; // address type: IPV4
cmd.s.u.v4.addr.s_addr = addr.v4.sin_addr.s_addr;
cmd.s.u.v4.port = addr.v4.sin_port;
memcpy( cmd.s.u.v4.data, data, length );
ret = sendto( ip_socket, cmd.buf, length + 10, 0, ( struct sockaddr * ) &socksRelayAddr.v4, sizeof( socksRelayAddr.v4 ) );
}
}
else {
if ( addr.ss.ss_family == AF_INET )
ret = sendto( ip_socket, data, length, 0, (struct sockaddr *) &addr, sizeof(struct sockaddr_in) );
#ifdef USE_IPV6
else if ( addr.ss.ss_family == AF_INET6 )
ret = sendto( ip6_socket, data, length, 0, (struct sockaddr *) &addr, sizeof(struct sockaddr_in6) );
#endif
}
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( "Sys_SendPacket: %s\n", NET_ErrorString() );
}
}
//=============================================================================
/*
==================
Sys_IsLANAddress
LAN clients will have their rate var ignored
==================
*/
qboolean Sys_IsLANAddress( const netadr_t *adr ) {
int index, run, addrsize;
qboolean differed;
const 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->ipv._4[0] == 10)
return qtrue;
if(adr->ipv._4[0] == 172 && (adr->ipv._4[1]&0xf0) == 16)
return qtrue;
if(adr->ipv._4[0] == 192 && adr->ipv._4[1] == 168)
return qtrue;
if(adr->ipv._4[0] == 127)
return qtrue;
}
#ifdef USE_IPV6
else if(adr->type == NA_IP6)
{
if(adr->ipv._6[0] == 0xfe && (adr->ipv._6[1] & 0xc0) == 0x80)
return qtrue;
if((adr->ipv._6[0] & 0xfe) == 0xfc)
return qtrue;
}
#endif
// 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->ipv._4;
addrsize = sizeof(adr->ipv._4);
}
#ifdef USE_IPV6
else if ( adr->type == NA_IP6 || adr->type == NA_MULTICAST6 )
{
// 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->ipv._6;
addrsize = sizeof(adr->ipv._6);
}
#endif
else
continue;
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), &localIP[i].addr );
if(localIP[i].type == NA_IP)
Com_Printf( "IP: %s\n", addrbuf);
#ifdef USE_IPV6
else if(localIP[i].type == NA_IP6)
Com_Printf( "IP6: %s\n", addrbuf);
#endif
}
}
//=============================================================================
/*
====================
NET_IPSocket
====================
*/
static SOCKET NET_IPSocket( const 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, (sockaddr_t *)&address, sizeof( address ), AF_INET, SOCK_DGRAM ) )
{
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
====================
*/
#ifdef USE_IPV6
static SOCKET NET_IP6Socket( const 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, (sockaddr_t *)&address, sizeof(address), AF_INET6, SOCK_DGRAM ) )
{
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_SetMulticast6
Set the current multicast group
====================
*/
static void NET_SetMulticast6( void )
{
struct sockaddr_in6 addr;
if ( !*net_mcast6addr->string || !Sys_StringToSockaddr( net_mcast6addr->string, (sockaddr_t *) &addr, sizeof( addr ), AF_INET6, SOCK_DGRAM ) )
{
Com_Printf("WARNING: NET_JoinMulticast6: Incorrect multicast address given, "
"please set cvar %s to a sane value.\n", net_mcast6addr->name);
Cvar_SetIntegerValue( 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( void )
{
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;
}
}
#endif // USE_IPV6
/*
====================
NET_OpenSocks
====================
*/
static void NET_OpenSocks( int port ) {
struct sockaddr_in address;
int len;
unsigned char buf[4 + 255 * 2];
socks5_request_t cmd;
usingSocks = qfalse;
Com_Printf( "Opening connection to SOCKS server.\n" );
if ( ( socks_socket = socket( AF_INET, SOCK_STREAM, IPPROTO_TCP ) ) == INVALID_SOCKET ) {
Com_Printf( "WARNING: NET_OpenSocks: socket: %s\n", NET_ErrorString() );
return;
}
if ( !Sys_StringToSockaddr( net_socksServer->string, (sockaddr_t*)&address, sizeof( address ), AF_INET, SOCK_STREAM ) ) {
Com_Printf( "WARNING: %s failed\n", __func__ );
return;
}
address.sin_port = htons( net_socksPort->integer );
if ( connect( socks_socket, ( struct sockaddr * )&address, sizeof( struct sockaddr_in ) ) == SOCKET_ERROR ) {
Com_Printf( "%s: connect: %s\n", __func__, NET_ErrorString() );
return;
}
buf[0] = 5; // SOCKS version
if ( *net_socksUsername->string || *net_socksPassword->string ) {
// rfc1929 - send socks authentication handshake
buf[1] = 2; // method count
buf[2] = 0; // method id #00: no authentication
buf[3] = 2; // method id #02: username/password
len = 4;
} else {
buf[1] = 1; // method count
buf[2] = 0; // method id #00: no authentication
len = 3;
}
if ( send( socks_socket, (void *)buf, len, 0 ) == SOCKET_ERROR ) {
Com_Printf( "%s: send: %s\n", __func__, NET_ErrorString() );
return;
}
// get the response
len = recv( socks_socket, (void *)buf, 32, 0 );
if ( len == SOCKET_ERROR ) {
Com_Printf( "%s: recv: %s\n", __func__, NET_ErrorString() );
return;
}
if ( len != 2 || buf[0] != 5 ) {
Com_Printf( "%s: bad auth.method response\n", __func__ );
return;
}
switch ( buf[1] ) {
case 0: // no authentication
case 2: // username/password authentication
break;
default:
Com_Printf( "%s: unsupported auth.method\n", __func__ );
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 );
if ( ulen > 255 ) {
ulen = 255;
}
if ( plen > 255 ) {
plen = 255;
}
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 ) {
Com_Printf( "%s: send: %s\n", __func__, NET_ErrorString() );
return;
}
// get the response
len = recv( socks_socket, (void *)buf, 64, 0 );
if ( len == SOCKET_ERROR ) {
Com_Printf( "%s: recv: %s\n", __func__, NET_ErrorString() );
return;
}
if ( len != 2 || buf[0] != 1 ) {
Com_Printf( "%s: bad auth response\n", __func__ );
return;
}
}
// send the UDP associate request
cmd.version = 5; // SOCKS version
cmd.command = 3; // UDP associate
cmd.reserved = 0; // reserved
cmd.addrtype = 1; // address type: IPV4
cmd.u.v4.addr.s_addr = INADDR_ANY;
cmd.u.v4.port = htons( port );
if ( send( socks_socket, (void *)&cmd, 10, 0 ) == SOCKET_ERROR ) {
Com_Printf( "%s: send: %s\n", __func__, NET_ErrorString() );
return;
}
// get the response
len = recv( socks_socket, (void *)&cmd, sizeof( cmd ), 0 );
if ( len == SOCKET_ERROR ) {
Com_Printf( "%s: recv: %s\n", __func__, NET_ErrorString() );
return;
}
if ( len < 10 || cmd.version != 5 ) {
Com_Printf( "%s: bad response\n", __func__ );
return;
}
// check completion code
if ( cmd.command != 0 ) {
Com_Printf( "%s: request denied: %i\n", __func__, cmd.command );
return;
}
if ( cmd.addrtype != 1 ) {
Com_Printf( "%s: relay address is not IPV4: %i\n", __func__, cmd.addrtype );
return;
}
memset( &socksRelayAddr, 0, sizeof( socksRelayAddr ) );
socksRelayAddr.v4.sin_family = AF_INET;
socksRelayAddr.v4.sin_addr.s_addr = cmd.u.v4.addr.s_addr;
socksRelayAddr.v4.sin_port = cmd.u.v4.port;
usingSocks = qtrue;
}
/*
=====================
NET_AddLocalAddress
=====================
*/
static void NET_AddLocalAddress( const char *ifname, const struct sockaddr *addr, const 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;
}
#ifdef USE_IPV6
else if(family == AF_INET6)
{
addrlen = sizeof(struct sockaddr_in6);
localIP[numIP].type = NA_IP6;
}
#endif
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++;
}
}
#ifndef _WIN32
static void NET_GetLocalAddress( void )
{
char hostname[256];
struct ifaddrs *ifap, *search;
if ( gethostname( hostname, sizeof( hostname ) ) )
return;
Com_Printf( "Hostname: %s\n", hostname );
numIP = 0;
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 // _WIN32
static void NET_GetLocalAddress( void ) {
char hostname[256];
struct addrinfo hint;
struct addrinfo *res = NULL;
numIP = 0;
if ( gethostname( hostname, sizeof( hostname ) ) == 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 addrinfo *search;
struct sockaddr_in mask4;
#ifdef USE_IPV6
struct sockaddr_in6 mask6;
#endif
/* 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));
mask4.sin_family = AF_INET;
memset(&mask4.sin_addr.s_addr, 0xFF, sizeof(mask4.sin_addr.s_addr));
#ifdef USE_IPV6
memset(&mask6, 0, sizeof(mask6));
mask6.sin6_family = AF_INET6;
memset(&mask6.sin6_addr, 0xFF, sizeof(mask6.sin6_addr));
#endif
// 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 );
#ifdef USE_IPV6
else if ( search->ai_family == AF_INET6 )
NET_AddLocalAddress( "", search->ai_addr, (struct sockaddr *) &mask6 );
#endif
}
Sys_ShowIP();
}
if ( res )
freeaddrinfo( res );
}
#endif // _WIN32
/*
====================
NET_OpenIP
====================
*/
static void NET_OpenIP( void ) {
int i;
int err;
int port;
#ifdef USE_IPV6
int port6;
#endif
port = net_port->integer;
#ifdef USE_IPV6
port6 = net_port6->integer;
#endif
NET_GetLocalAddress();
// automatically scan for a valid port, so multiple
// dedicated servers can be started without requiring
// a different net_port for each one
#ifdef USE_IPV6
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_SetIntegerValue( "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");
}
#endif
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_SetIntegerValue( "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;
#if defined (DEDICATED) || !defined (USE_IPV6)
// I want server owners to explicitly turn on ipv6 support.
net_enabled = Cvar_Get( "net_enabled", "1", CVAR_LATCH | CVAR_ARCHIVE_ND | CVAR_NORESTART );
#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_ND | CVAR_NORESTART );
#endif
Cvar_SetDescription( net_enabled, "Networking options, bitmask:\n"
" 1 - enable IPv4\n"
#ifdef USE_IPV6
" 2 - enable IPv6\n"
" 4 - prioritize IPv6 connections over IPv4\n"
" 8 - disable IPv6 multicast"
#endif
);
Cvar_CheckRange( net_enabled, NULL, NULL, CV_INTEGER );
modified = net_enabled->modified;
net_enabled->modified = qfalse;
net_ip = Cvar_Get( "net_ip", "0.0.0.0", CVAR_LATCH );
Cvar_SetDescription( net_ip, "Specifies network interface address client should use for outgoing UDP connections using IPv4." );
modified += net_ip->modified;
net_ip->modified = qfalse;
net_port = Cvar_Get( "net_port", va( "%i", PORT_SERVER ), CVAR_LATCH | CVAR_NORESTART );
Cvar_CheckRange( net_port, "0", "65535", CV_INTEGER );
Cvar_SetDescription( net_port, "The network port to use (IPv4)." );
modified += net_port->modified;
net_port->modified = qfalse;
#ifdef USE_IPV6
net_ip6 = Cvar_Get( "net_ip6", "::", CVAR_LATCH );
Cvar_SetDescription( net_ip6, "Specifies network interface address client should use for outgoing UDP connections using IPv6." );
modified += net_ip6->modified;
net_ip6->modified = qfalse;
net_port6 = Cvar_Get( "net_port6", va( "%i", PORT_SERVER ), CVAR_LATCH | CVAR_NORESTART );
Cvar_CheckRange( net_port6, "0", "65535", CV_INTEGER );
Cvar_SetDescription( net_port6, "The network port to use (IPv6)." );
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_ND );
Cvar_SetDescription( net_mcast6addr, "Multicast address to use for scanning for IPv6 servers on the local network." );
modified += net_mcast6addr->modified;
net_mcast6addr->modified = qfalse;
#ifdef _WIN32
net_mcast6iface = Cvar_Get( "net_mcast6iface", "0", CVAR_LATCH | CVAR_ARCHIVE_ND );
#else
net_mcast6iface = Cvar_Get( "net_mcast6iface", "", CVAR_LATCH | CVAR_ARCHIVE_ND );
#endif
Cvar_SetDescription( net_mcast6iface, "Outgoing interface to use for scan." );
modified += net_mcast6iface->modified;
net_mcast6iface->modified = qfalse;
#endif // USE_IPV6
net_socksEnabled = Cvar_Get( "net_socksEnabled", "0", CVAR_LATCH | CVAR_ARCHIVE_ND );
Cvar_CheckRange( net_socksEnabled, "0", "1", CV_INTEGER );
Cvar_SetDescription( net_socksEnabled, "Toggle the use of network socks 5 protocol enabling firewall access (can only be set at initialization time from the OS command line)." );
modified += net_socksEnabled->modified;
net_socksEnabled->modified = qfalse;
net_socksServer = Cvar_Get( "net_socksServer", "", CVAR_LATCH | CVAR_ARCHIVE_ND );
Cvar_SetDescription( net_socksServer, "Set the address (name or IP number) of the SOCKS server (firewall machine), NOT a Q3ATEST server (can only be set at initialization time from the OS command line)." );
modified += net_socksServer->modified;
net_socksServer->modified = qfalse;
net_socksPort = Cvar_Get( "net_socksPort", "1080", CVAR_LATCH | CVAR_ARCHIVE_ND );
Cvar_CheckRange( net_socksPort, "0", "65535", CV_INTEGER );
Cvar_SetDescription( net_socksPort, "Set proxy and/or firewall port, default is 1080 (can only be set at initialization time from the OS command line)." );
modified += net_socksPort->modified;
net_socksPort->modified = qfalse;
net_socksUsername = Cvar_Get( "net_socksUsername", "", CVAR_LATCH | CVAR_ARCHIVE_ND );
Cvar_SetDescription( net_socksUsername, "Variable holds username for socks firewall. Supports no authentication and username/password authentication method (RFC-1929). It does NOT support GSS-API method (RFC-1961) authentication (can only be set at initialization time from the OS command line)." );
modified += net_socksUsername->modified;
net_socksUsername->modified = qfalse;
net_socksPassword = Cvar_Get( "net_socksPassword", "", CVAR_LATCH | CVAR_ARCHIVE_ND );
Cvar_SetDescription( net_socksPassword, "Variable holds password for socks firewall access. Supports no authentication and username/password authentication method (RFC-1929). It does NOT support GSS-API method (RFC-1961) authentication (can only be set at initialization time from the OS command line)." );
modified += net_socksPassword->modified;
net_socksPassword->modified = qfalse;
net_dropsim = Cvar_Get( "net_dropsim", "", CVAR_TEMP );
Cvar_SetDescription( net_dropsim, "Simulated packet drops." );
return modified ? qtrue : qfalse;
}
/*
====================
NET_Config
====================
*/
static 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 = 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 != INVALID_SOCKET ) {
closesocket( ip_socket );
ip_socket = INVALID_SOCKET;
}
#ifdef USE_IPV6
if(multicast6_socket != INVALID_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;
}
#endif
if ( socks_socket != INVALID_SOCKET ) {
closesocket( socks_socket );
socks_socket = INVALID_SOCKET;
}
}
if( start )
{
if ( net_enabled->integer )
{
NET_OpenIP();
#ifdef USE_IPV6
NET_SetMulticast6();
#endif
}
}
}
/*
====================
NET_Init
====================
*/
void NET_Init( void ) {
#ifdef _WIN32
int r;
r = WSAStartup( MAKEWORD( 2, 0 ), &winsockdata );
if( r ) {
Com_Printf( S_COLOR_YELLOW "WARNING: Winsock initialization failed, returned %d\n", r );
return;
}
winsockInitialized = qtrue;
Com_DPrintf( "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.
====================
*/
static void NET_Event( const fd_set *fdr )
{
byte bufData[ MAX_MSGLEN_BUF ];
netadr_t from;
msg_t netmsg;
while( 1 )
{
MSG_Init( &netmsg, bufData, MAX_MSGLEN );
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
}
#ifdef DEDICATED
Com_RunAndTimeServerPacket( &from, &netmsg );
#else
if ( com_sv_running->integer || com_dedicated->integer )
Com_RunAndTimeServerPacket( &from, &netmsg );
else
CL_PacketEvent( &from, &netmsg );
#endif
}
else
break;
}
}
/*
====================
NET_Sleep
Sleeps msec or until something happens on the network
Returns qfalse on network event or qtrue in all other cases
====================
*/
qboolean NET_Sleep( int timeout )
{
struct timeval tv;
fd_set fdr;
int retval;
SOCKET highestfd = INVALID_SOCKET;
if ( timeout < 0 )
timeout = 0;
FD_ZERO( &fdr );
if ( ip_socket != INVALID_SOCKET )
{
FD_SET( ip_socket, &fdr );
highestfd = ip_socket;
}
#ifdef USE_IPV6
if ( ip6_socket != INVALID_SOCKET )
{
FD_SET( ip6_socket, &fdr );
if ( highestfd == INVALID_SOCKET || ip6_socket > highestfd )
highestfd = ip6_socket;
}
#endif
if ( highestfd == INVALID_SOCKET )
{
#ifdef _WIN32
// windows ain't happy when select is called without valid FDs
Sleep( timeout / 1000 );
return qtrue;
#else
usleep( timeout );
return qtrue;
#endif
}
tv.tv_sec = timeout / 1000000;
tv.tv_usec = timeout - tv.tv_sec * 1000000;
retval = select( highestfd + 1, &fdr, NULL, NULL, &tv );
if ( retval > 0 ) {
NET_Event( &fdr );
return qfalse;
}
if ( retval == SOCKET_ERROR ) {
#ifndef _WIN32
if ( socketError != EINTR )
#endif
Com_Printf( S_COLOR_YELLOW "Warning: select() syscall failed: %s\n",
NET_ErrorString() );
}
return qtrue;
}
/*
====================
NET_Restart_f
====================
*/
static void NET_Restart_f( void )
{
NET_Config( qtrue );
}
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