netconn.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3 Copyright (C) 2002 Mathieu Olivier
   4 Copyright (C) 2003 Forest Hale
   5
   6 This program is free software; you can redistribute it and/or
   7 modify it under the terms of the GNU General Public License
   8 as published by the Free Software Foundation; either version 2
   9 of the License, or (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  14
  15 See the GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20
  21 */
  22
  23 #include "quakedef.h"
  24 #include "lhnet.h"
  25
  26 // for secure rcon authentication
  27 #include "hmac.h"
  28 #include "mdfour.h"
  29 #include <time.h>
  30
  31 #define QWMASTER_PORT 27000
  32 #define DPMASTER_PORT 27950
  33
  34 // note this defaults on for dedicated servers, off for listen servers
  35 cvar_t sv_public = {0, "sv_public", "0", "1: advertises this server on the master server (so that players can find it in the server browser); 0: allow direct queries only; -1: do not respond to direct queries; -2: do not allow anyone to connect; -3: already block at getchallenge level"};
  36 cvar_t sv_public_rejectreason = {0, "sv_public_rejectreason", "The server is closing.", "Rejection reason for connects when sv_public is -2"};
  37 static cvar_t sv_heartbeatperiod = {CVAR_SAVE, "sv_heartbeatperiod", "120", "how often to send heartbeat in seconds (only used if sv_public is 1)"};
  38
  39 static cvar_t sv_masters [] =
  40 {
  41         {CVAR_SAVE, "sv_master1", "", "user-chosen master server 1"},
  42         {CVAR_SAVE, "sv_master2", "", "user-chosen master server 2"},
  43         {CVAR_SAVE, "sv_master3", "", "user-chosen master server 3"},
  44         {CVAR_SAVE, "sv_master4", "", "user-chosen master server 4"},
  45         {0, "sv_masterextra1", "69.59.212.88", "ghdigital.com - default master server 1 (admin: LordHavoc)"}, // admin: LordHavoc
  46         {0, "sv_masterextra2", "64.22.107.125", "dpmaster.deathmask.net - default master server 2 (admin: Willis)"}, // admin: Willis
  47         {0, "sv_masterextra3", "92.62.40.73", "dpmaster.tchr.no - default master server 3 (admin: tChr)"}, // admin: tChr
  48 #ifdef SUPPORTIPV6
  49         {0, "sv_masterextra4", "[2001:41d0:2:1628::4450]:27950", "dpmaster.div0.qc.to - default master server 4 (admin: divVerent)"}, // admin: divVerent
  50 #endif
  51         {0, NULL, NULL, NULL}
  52 };
  53
  54 static cvar_t sv_qwmasters [] =
  55 {
  56         {CVAR_SAVE, "sv_qwmaster1", "", "user-chosen qwmaster server 1"},
  57         {CVAR_SAVE, "sv_qwmaster2", "", "user-chosen qwmaster server 2"},
  58         {CVAR_SAVE, "sv_qwmaster3", "", "user-chosen qwmaster server 3"},
  59         {CVAR_SAVE, "sv_qwmaster4", "", "user-chosen qwmaster server 4"},
  60         {0, "sv_qwmasterextra1", "master.quakeservers.net:27000", "Global master server. (admin: unknown)"},
  61         {0, "sv_qwmasterextra2", "asgaard.morphos-team.net:27000", "Global master server. (admin: unknown)"},
  62         {0, "sv_qwmasterextra3", "qwmaster.ocrana.de:27000", "German master server. (admin: unknown)"},
  63         {0, "sv_qwmasterextra4", "masterserver.exhale.de:27000", "German master server. (admin: unknown)"},
  64         {0, "sv_qwmasterextra5", "kubus.rulez.pl:27000", "Poland master server. (admin: unknown)"},
  65         {0, NULL, NULL, NULL}
  66 };
  67
  68 static double nextheartbeattime = 0;
  69
  70 sizebuf_t net_message;
  71 static unsigned char net_message_buf[NET_MAXMESSAGE];
  72
  73 cvar_t net_messagetimeout = {0, "net_messagetimeout","300", "drops players who have not sent any packets for this many seconds"};
  74 cvar_t net_connecttimeout = {0, "net_connecttimeout","15", "after requesting a connection, the client must reply within this many seconds or be dropped (cuts down on connect floods). Must be above 10 seconds."};
  75 cvar_t net_connectfloodblockingtimeout = {0, "net_connectfloodblockingtimeout", "5", "when a connection packet is received, it will block all future connect packets from that IP address for this many seconds (cuts down on connect floods)"};
  76 cvar_t hostname = {CVAR_SAVE, "hostname", "UNNAMED", "server message to show in server browser"};
  77 cvar_t developer_networking = {0, "developer_networking", "0", "prints all received and sent packets (recommended only for debugging)"};
  78
  79 cvar_t cl_netlocalping = {0, "cl_netlocalping","0", "lags local loopback connection by this much ping time (useful to play more fairly on your own server with people with higher pings)"};
  80 static cvar_t cl_netpacketloss_send = {0, "cl_netpacketloss_send","0", "drops this percentage of outgoing packets, useful for testing network protocol robustness (jerky movement, prediction errors, etc)"};
  81 static cvar_t cl_netpacketloss_receive = {0, "cl_netpacketloss_receive","0", "drops this percentage of incoming packets, useful for testing network protocol robustness (jerky movement, effects failing to start, sounds failing to play, etc)"};
  82 static cvar_t net_slist_queriespersecond = {0, "net_slist_queriespersecond", "20", "how many server information requests to send per second"};
  83 static cvar_t net_slist_queriesperframe = {0, "net_slist_queriesperframe", "4", "maximum number of server information requests to send each rendered frame (guards against low framerates causing problems)"};
  84 static cvar_t net_slist_timeout = {0, "net_slist_timeout", "4", "how long to listen for a server information response before giving up"};
  85 static cvar_t net_slist_pause = {0, "net_slist_pause", "0", "when set to 1, the server list won't update until it is set back to 0"};
  86 static cvar_t net_slist_maxtries = {0, "net_slist_maxtries", "3", "how many times to ask the same server for information (more times gives better ping reports but takes longer)"};
  87 static cvar_t net_slist_favorites = {CVAR_SAVE | CVAR_NQUSERINFOHACK, "net_slist_favorites", "", "contains a list of IP addresses and ports to always query explicitly"};
  88 static cvar_t gameversion = {0, "gameversion", "0", "version of game data (mod-specific) to be sent to querying clients"};
  89 static cvar_t gameversion_min = {0, "gameversion_min", "-1", "minimum version of game data (mod-specific), when client and server gameversion mismatch in the server browser the server is shown as incompatible; if -1, gameversion is used alone"};
  90 static cvar_t gameversion_max = {0, "gameversion_max", "-1", "maximum version of game data (mod-specific), when client and server gameversion mismatch in the server browser the server is shown as incompatible; if -1, gameversion is used alone"};
  91 static cvar_t rcon_restricted_password = {CVAR_PRIVATE, "rcon_restricted_password", "", "password to authenticate rcon commands in restricted mode; may be set to a string of the form user1:pass1 user2:pass2 user3:pass3 to allow multiple user accounts - the client then has to specify ONE of these combinations"};
  92 static cvar_t rcon_restricted_commands = {0, "rcon_restricted_commands", "", "allowed commands for rcon when the restricted mode password was used"};
  93 static cvar_t rcon_secure_maxdiff = {0, "rcon_secure_maxdiff", "5", "maximum time difference between rcon request and server system clock (to protect against replay attack)"};
  94 extern cvar_t rcon_secure;
  95 extern cvar_t rcon_secure_challengetimeout;
  96
  97 /* statistic counters */
  98 static int packetsSent = 0;
  99 static int packetsReSent = 0;
 100 static int packetsReceived = 0;
 101 static int receivedDuplicateCount = 0;
 102 static int droppedDatagrams = 0;
 103
 104 static int unreliableMessagesSent = 0;
 105 static int unreliableMessagesReceived = 0;
 106 static int reliableMessagesSent = 0;
 107 static int reliableMessagesReceived = 0;
 108
 109 double masterquerytime = -1000;
 110 int masterquerycount = 0;
 111 int masterreplycount = 0;
 112 int serverquerycount = 0;
 113 int serverreplycount = 0;
 114
 115 challenge_t challenge[MAX_CHALLENGES];
 116
 117 /// this is only false if there are still servers left to query
 118 static qboolean serverlist_querysleep = true;
 119 static qboolean serverlist_paused = false;
 120 /// this is pushed a second or two ahead of realtime whenever a master server
 121 /// reply is received, to avoid issuing queries while master replies are still
 122 /// flooding in (which would make a mess of the ping times)
 123 static double serverlist_querywaittime = 0;
 124
 125 static unsigned char sendbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
 126 static unsigned char readbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
 127 static unsigned char cryptosendbuffer[NET_HEADERSIZE+NET_MAXMESSAGE+CRYPTO_HEADERSIZE];
 128 static unsigned char cryptoreadbuffer[NET_HEADERSIZE+NET_MAXMESSAGE+CRYPTO_HEADERSIZE];
 129
 130 static int cl_numsockets;
 131 static lhnetsocket_t *cl_sockets[16];
 132 static int sv_numsockets;
 133 static lhnetsocket_t *sv_sockets[16];
 134
 135 netconn_t *netconn_list = NULL;
 136 mempool_t *netconn_mempool = NULL;
 137
 138 cvar_t cl_netport = {0, "cl_port", "0", "forces client to use chosen port number if not 0"};
 139 cvar_t sv_netport = {0, "port", "26000", "server port for players to connect to"};
 140 cvar_t net_address = {0, "net_address", "", "network address to open ipv4 ports on (if empty, use default interfaces)"};
 141 cvar_t net_address_ipv6 = {0, "net_address_ipv6", "", "network address to open ipv6 ports on (if empty, use default interfaces)"};
 142
 143 char cl_net_extresponse[NET_EXTRESPONSE_MAX][1400];
 144 int cl_net_extresponse_count = 0;
 145 int cl_net_extresponse_last = 0;
 146
 147 char sv_net_extresponse[NET_EXTRESPONSE_MAX][1400];
 148 int sv_net_extresponse_count = 0;
 149 int sv_net_extresponse_last = 0;
 150
 151 // ServerList interface
 152 serverlist_mask_t serverlist_andmasks[SERVERLIST_ANDMASKCOUNT];
 153 serverlist_mask_t serverlist_ormasks[SERVERLIST_ORMASKCOUNT];
 154
 155 serverlist_infofield_t serverlist_sortbyfield;
 156 int serverlist_sortflags;
 157
 158 int serverlist_viewcount = 0;
 159 unsigned short serverlist_viewlist[SERVERLIST_VIEWLISTSIZE];
 160
 161 int serverlist_maxcachecount = 0;
 162 int serverlist_cachecount = 0;
 163 serverlist_entry_t *serverlist_cache = NULL;
 164
 165 qboolean serverlist_consoleoutput;
 166
 167 static int nFavorites = 0;
 168 static lhnetaddress_t favorites[MAX_FAVORITESERVERS];
 169 static int nFavorites_idfp = 0;
 170 static char favorites_idfp[MAX_FAVORITESERVERS][FP64_SIZE+1];
 171
 172 void NetConn_UpdateFavorites(void)
 173 {
 174         const char *p;
 175         nFavorites = 0;
 176         nFavorites_idfp = 0;
 177         p = net_slist_favorites.string;
 178         while((size_t) nFavorites < sizeof(favorites) / sizeof(*favorites) && COM_ParseToken_Console(&p))
 179         {
 180                 if(com_token[0] != '[' && strlen(com_token) == FP64_SIZE && !strchr(com_token, '.'))
 181                 // currently 44 bytes, longest possible IPv6 address: 39 bytes, so this works
 182                 // (if v6 address contains port, it must start with '[')
 183                 {
 184                         strlcpy(favorites_idfp[nFavorites_idfp], com_token, sizeof(favorites_idfp[nFavorites_idfp]));
 185                         ++nFavorites_idfp;
 186                 }
 187                 else
 188                 {
 189                         if(LHNETADDRESS_FromString(&favorites[nFavorites], com_token, 26000))
 190                                 ++nFavorites;
 191                 }
 192         }
 193 }
 194
 195 /// helper function to insert a value into the viewset
 196 /// spare entries will be removed
 197 static void _ServerList_ViewList_Helper_InsertBefore( int index, serverlist_entry_t *entry )
 198 {
 199     int i;
 200         if( serverlist_viewcount < SERVERLIST_VIEWLISTSIZE ) {
 201                 i = serverlist_viewcount++;
 202         } else {
 203                 i = SERVERLIST_VIEWLISTSIZE - 1;
 204         }
 205
 206         for( ; i > index ; i-- )
 207                 serverlist_viewlist[ i ] = serverlist_viewlist[ i - 1 ];
 208
 209         serverlist_viewlist[index] = (int)(entry - serverlist_cache);
 210 }
 211
 212 /// we suppose serverlist_viewcount to be valid, ie > 0
 213 static void _ServerList_ViewList_Helper_Remove( int index )
 214 {
 215         serverlist_viewcount--;
 216         for( ; index < serverlist_viewcount ; index++ )
 217                 serverlist_viewlist[index] = serverlist_viewlist[index + 1];
 218 }
 219
 220 /// \returns true if A should be inserted before B
 221 static qboolean _ServerList_Entry_Compare( serverlist_entry_t *A, serverlist_entry_t *B )
 222 {
 223         int result = 0; // > 0 if for numbers A > B and for text if A < B
 224
 225         if( serverlist_sortflags & SLSF_FAVORITESFIRST )
 226         {
 227                 if(A->info.isfavorite != B->info.isfavorite)
 228                         return A->info.isfavorite;
 229         }
 230
 231         switch( serverlist_sortbyfield ) {
 232                 case SLIF_PING:
 233                         result = A->info.ping - B->info.ping;
 234                         break;
 235                 case SLIF_MAXPLAYERS:
 236                         result = A->info.maxplayers - B->info.maxplayers;
 237                         break;
 238                 case SLIF_NUMPLAYERS:
 239                         result = A->info.numplayers - B->info.numplayers;
 240                         break;
 241                 case SLIF_NUMBOTS:
 242                         result = A->info.numbots - B->info.numbots;
 243                         break;
 244                 case SLIF_NUMHUMANS:
 245                         result = A->info.numhumans - B->info.numhumans;
 246                         break;
 247                 case SLIF_FREESLOTS:
 248                         result = A->info.freeslots - B->info.freeslots;
 249                         break;
 250                 case SLIF_PROTOCOL:
 251                         result = A->info.protocol - B->info.protocol;
 252                         break;
 253                 case SLIF_CNAME:
 254                         result = strcmp( B->info.cname, A->info.cname );
 255                         break;
 256                 case SLIF_GAME:
 257                         result = strcasecmp( B->info.game, A->info.game );
 258                         break;
 259                 case SLIF_MAP:
 260                         result = strcasecmp( B->info.map, A->info.map );
 261                         break;
 262                 case SLIF_MOD:
 263                         result = strcasecmp( B->info.mod, A->info.mod );
 264                         break;
 265                 case SLIF_NAME:
 266                         result = strcasecmp( B->info.name, A->info.name );
 267                         break;
 268                 case SLIF_QCSTATUS:
 269                         result = strcasecmp( B->info.qcstatus, A->info.qcstatus ); // not really THAT useful, though
 270                         break;
 271                 case SLIF_ISFAVORITE:
 272                         result = !!B->info.isfavorite - !!A->info.isfavorite;
 273                         break;
 274                 default:
 275                         Con_DPrint( "_ServerList_Entry_Compare: Bad serverlist_sortbyfield!\n" );
 276                         break;
 277         }
 278
 279         if (result != 0)
 280         {
 281                 if( serverlist_sortflags & SLSF_DESCENDING )
 282                         return result > 0;
 283                 else
 284                         return result < 0;
 285         }
 286
 287         // if the chosen sort key is identical, sort by index
 288         // (makes this a stable sort, so that later replies from servers won't
 289         //  shuffle the servers around when they have the same ping)
 290         return A < B;
 291 }
 292
 293 static qboolean _ServerList_CompareInt( int A, serverlist_maskop_t op, int B )
 294 {
 295         // This should actually be done with some intermediate and end-of-function return
 296         switch( op ) {
 297                 case SLMO_LESS:
 298                         return A < B;
 299                 case SLMO_LESSEQUAL:
 300                         return A <= B;
 301                 case SLMO_EQUAL:
 302                         return A == B;
 303                 case SLMO_GREATER:
 304                         return A > B;
 305                 case SLMO_NOTEQUAL:
 306                         return A != B;
 307                 case SLMO_GREATEREQUAL:
 308                 case SLMO_CONTAINS:
 309                 case SLMO_NOTCONTAIN:
 310                 case SLMO_STARTSWITH:
 311                 case SLMO_NOTSTARTSWITH:
 312                         return A >= B;
 313                 default:
 314                         Con_DPrint( "_ServerList_CompareInt: Bad op!\n" );
 315                         return false;
 316         }
 317 }
 318
 319 static qboolean _ServerList_CompareStr( const char *A, serverlist_maskop_t op, const char *B )
 320 {
 321         int i;
 322         char bufferA[ 1400 ], bufferB[ 1400 ]; // should be more than enough
 323         COM_StringDecolorize(A, 0, bufferA, sizeof(bufferA), false);
 324         for (i = 0;i < (int)sizeof(bufferA)-1 && bufferA[i];i++)
 325                 bufferA[i] = (bufferA[i] >= 'A' && bufferA[i] <= 'Z') ? (bufferA[i] + 'a' - 'A') : bufferA[i];
 326         bufferA[i] = 0;
 327         for (i = 0;i < (int)sizeof(bufferB)-1 && B[i];i++)
 328                 bufferB[i] = (B[i] >= 'A' && B[i] <= 'Z') ? (B[i] + 'a' - 'A') : B[i];
 329         bufferB[i] = 0;
 330
 331         // Same here, also using an intermediate & final return would be more appropriate
 332         // A info B mask
 333         switch( op ) {
 334                 case SLMO_CONTAINS:
 335                         return *bufferB && !!strstr( bufferA, bufferB ); // we want a real bool
 336                 case SLMO_NOTCONTAIN:
 337                         return !*bufferB || !strstr( bufferA, bufferB );
 338                 case SLMO_STARTSWITH:
 339                         //Con_Printf("startsWith: %s %s\n", bufferA, bufferB);
 340                         return *bufferB && !memcmp(bufferA, bufferB, strlen(bufferB));
 341                 case SLMO_NOTSTARTSWITH:
 342                         return !*bufferB || memcmp(bufferA, bufferB, strlen(bufferB));
 343                 case SLMO_LESS:
 344                         return strcmp( bufferA, bufferB ) < 0;
 345                 case SLMO_LESSEQUAL:
 346                         return strcmp( bufferA, bufferB ) <= 0;
 347                 case SLMO_EQUAL:
 348                         return strcmp( bufferA, bufferB ) == 0;
 349                 case SLMO_GREATER:
 350                         return strcmp( bufferA, bufferB ) > 0;
 351                 case SLMO_NOTEQUAL:
 352                         return strcmp( bufferA, bufferB ) != 0;
 353                 case SLMO_GREATEREQUAL:
 354                         return strcmp( bufferA, bufferB ) >= 0;
 355                 default:
 356                         Con_DPrint( "_ServerList_CompareStr: Bad op!\n" );
 357                         return false;
 358         }
 359 }
 360
 361 static qboolean _ServerList_Entry_Mask( serverlist_mask_t *mask, serverlist_info_t *info )
 362 {
 363         if( !_ServerList_CompareInt( info->ping, mask->tests[SLIF_PING], mask->info.ping ) )
 364                 return false;
 365         if( !_ServerList_CompareInt( info->maxplayers, mask->tests[SLIF_MAXPLAYERS], mask->info.maxplayers ) )
 366                 return false;
 367         if( !_ServerList_CompareInt( info->numplayers, mask->tests[SLIF_NUMPLAYERS], mask->info.numplayers ) )
 368                 return false;
 369         if( !_ServerList_CompareInt( info->numbots, mask->tests[SLIF_NUMBOTS], mask->info.numbots ) )
 370                 return false;
 371         if( !_ServerList_CompareInt( info->numhumans, mask->tests[SLIF_NUMHUMANS], mask->info.numhumans ) )
 372                 return false;
 373         if( !_ServerList_CompareInt( info->freeslots, mask->tests[SLIF_FREESLOTS], mask->info.freeslots ) )
 374                 return false;
 375         if( !_ServerList_CompareInt( info->protocol, mask->tests[SLIF_PROTOCOL], mask->info.protocol ))
 376                 return false;
 377         if( *mask->info.cname
 378                 && !_ServerList_CompareStr( info->cname, mask->tests[SLIF_CNAME], mask->info.cname ) )
 379                 return false;
 380         if( *mask->info.game
 381                 && !_ServerList_CompareStr( info->game, mask->tests[SLIF_GAME], mask->info.game ) )
 382                 return false;
 383         if( *mask->info.mod
 384                 && !_ServerList_CompareStr( info->mod, mask->tests[SLIF_MOD], mask->info.mod ) )
 385                 return false;
 386         if( *mask->info.map
 387                 && !_ServerList_CompareStr( info->map, mask->tests[SLIF_MAP], mask->info.map ) )
 388                 return false;
 389         if( *mask->info.name
 390                 && !_ServerList_CompareStr( info->name, mask->tests[SLIF_NAME], mask->info.name ) )
 391                 return false;
 392         if( *mask->info.qcstatus
 393                 && !_ServerList_CompareStr( info->qcstatus, mask->tests[SLIF_QCSTATUS], mask->info.qcstatus ) )
 394                 return false;
 395         if( *mask->info.players
 396                 && !_ServerList_CompareStr( info->players, mask->tests[SLIF_PLAYERS], mask->info.players ) )
 397                 return false;
 398         if( !_ServerList_CompareInt( info->isfavorite, mask->tests[SLIF_ISFAVORITE], mask->info.isfavorite ))
 399                 return false;
 400         return true;
 401 }
 402
 403 static void ServerList_ViewList_Insert( serverlist_entry_t *entry )
 404 {
 405         int start, end, mid, i;
 406         lhnetaddress_t addr;
 407
 408         // reject incompatible servers
 409         if(
 410                 entry->info.gameversion != gameversion.integer
 411                 &&
 412                 !(
 413                            gameversion_min.integer >= 0 // min/max range set by user/mod?
 414                         && gameversion_max.integer >= 0
 415                         && gameversion_min.integer >= entry->info.gameversion // version of server in min/max range?
 416                         && gameversion_max.integer <= entry->info.gameversion
 417                  )
 418         )
 419                 return;
 420
 421         // refresh the "favorite" status
 422         entry->info.isfavorite = false;
 423         if(LHNETADDRESS_FromString(&addr, entry->info.cname, 26000))
 424         {
 425                 char idfp[FP64_SIZE+1];
 426                 for(i = 0; i < nFavorites; ++i)
 427                 {
 428                         if(LHNETADDRESS_Compare(&addr, &favorites[i]) == 0)
 429                         {
 430                                 entry->info.isfavorite = true;
 431                                 break;
 432                         }
 433                 }
 434                 if(Crypto_RetrieveHostKey(&addr, 0, NULL, 0, idfp, sizeof(idfp), NULL))
 435                 {
 436                         for(i = 0; i < nFavorites_idfp; ++i)
 437                         {
 438                                 if(!strcmp(idfp, favorites_idfp[i]))
 439                                 {
 440                                         entry->info.isfavorite = true;
 441                                         break;
 442                                 }
 443                         }
 444                 }
 445         }
 446
 447         // FIXME: change this to be more readable (...)
 448         // now check whether it passes through the masks
 449         for( start = 0 ; start < SERVERLIST_ANDMASKCOUNT && serverlist_andmasks[start].active; start++ )
 450                 if( !_ServerList_Entry_Mask( &serverlist_andmasks[start], &entry->info ) )
 451                         return;
 452
 453         for( start = 0 ; start < SERVERLIST_ORMASKCOUNT && serverlist_ormasks[start].active ; start++ )
 454                 if( _ServerList_Entry_Mask( &serverlist_ormasks[start], &entry->info ) )
 455                         break;
 456         if( start == SERVERLIST_ORMASKCOUNT || (start > 0 && !serverlist_ormasks[start].active) )
 457                 return;
 458
 459         if( !serverlist_viewcount ) {
 460                 _ServerList_ViewList_Helper_InsertBefore( 0, entry );
 461                 return;
 462         }
 463         // ok, insert it, we just need to find out where exactly:
 464
 465         // two special cases
 466         // check whether to insert it as new first item
 467         if( _ServerList_Entry_Compare( entry, ServerList_GetViewEntry(0) ) ) {
 468                 _ServerList_ViewList_Helper_InsertBefore( 0, entry );
 469                 return;
 470         } // check whether to insert it as new last item
 471         else if( !_ServerList_Entry_Compare( entry, ServerList_GetViewEntry(serverlist_viewcount - 1) ) ) {
 472                 _ServerList_ViewList_Helper_InsertBefore( serverlist_viewcount, entry );
 473                 return;
 474         }
 475         start = 0;
 476         end = serverlist_viewcount - 1;
 477         while( end > start + 1 )
 478         {
 479                 mid = (start + end) / 2;
 480                 // test the item that lies in the middle between start and end
 481                 if( _ServerList_Entry_Compare( entry, ServerList_GetViewEntry(mid) ) )
 482                         // the item has to be in the upper half
 483                         end = mid;
 484                 else
 485                         // the item has to be in the lower half
 486                         start = mid;
 487         }
 488         _ServerList_ViewList_Helper_InsertBefore( start + 1, entry );
 489 }
 490
 491 static void ServerList_ViewList_Remove( serverlist_entry_t *entry )
 492 {
 493         int i;
 494         for( i = 0; i < serverlist_viewcount; i++ )
 495         {
 496                 if (ServerList_GetViewEntry(i) == entry)
 497                 {
 498                         _ServerList_ViewList_Helper_Remove(i);
 499                         break;
 500                 }
 501         }
 502 }
 503
 504 void ServerList_RebuildViewList(void)
 505 {
 506         int i;
 507
 508         serverlist_viewcount = 0;
 509         for( i = 0 ; i < serverlist_cachecount ; i++ ) {
 510                 serverlist_entry_t *entry = &serverlist_cache[i];
 511                 // also display entries that are currently being refreshed [11/8/2007 Black]
 512                 if( entry->query == SQS_QUERIED || entry->query == SQS_REFRESHING )
 513                         ServerList_ViewList_Insert( entry );
 514         }
 515 }
 516
 517 void ServerList_ResetMasks(void)
 518 {
 519         int i;
 520
 521         memset( &serverlist_andmasks, 0, sizeof( serverlist_andmasks ) );
 522         memset( &serverlist_ormasks, 0, sizeof( serverlist_ormasks ) );
 523         // numbots needs to be compared to -1 to always succeed
 524         for(i = 0; i < SERVERLIST_ANDMASKCOUNT; ++i)
 525                 serverlist_andmasks[i].info.numbots = -1;
 526         for(i = 0; i < SERVERLIST_ORMASKCOUNT; ++i)
 527                 serverlist_ormasks[i].info.numbots = -1;
 528 }
 529
 530 void ServerList_GetPlayerStatistics(int *numplayerspointer, int *maxplayerspointer)
 531 {
 532         int i;
 533         int numplayers = 0, maxplayers = 0;
 534         for (i = 0;i < serverlist_cachecount;i++)
 535         {
 536                 if (serverlist_cache[i].query == SQS_QUERIED)
 537                 {
 538                         numplayers += serverlist_cache[i].info.numhumans;
 539                         maxplayers += serverlist_cache[i].info.maxplayers;
 540                 }
 541         }
 542         *numplayerspointer = numplayers;
 543         *maxplayerspointer = maxplayers;
 544 }
 545
 546 #if 0
 547 static void _ServerList_Test(void)
 548 {
 549         int i;
 550         if (serverlist_maxcachecount <= 1024)
 551         {
 552                 serverlist_maxcachecount = 1024;
 553                 serverlist_cache = (serverlist_entry_t *)Mem_Realloc(netconn_mempool, (void *)serverlist_cache, sizeof(serverlist_entry_t) * serverlist_maxcachecount);
 554         }
 555         for( i = 0 ; i < 1024 ; i++ ) {
 556                 memset( &serverlist_cache[serverlist_cachecount], 0, sizeof( serverlist_entry_t ) );
 557                 serverlist_cache[serverlist_cachecount].info.ping = 1000 + 1024 - i;
 558                 dpsnprintf( serverlist_cache[serverlist_cachecount].info.name, sizeof(serverlist_cache[serverlist_cachecount].info.name), "Black's ServerList Test %i", i );
 559                 serverlist_cache[serverlist_cachecount].finished = true;
 560                 dpsnprintf( serverlist_cache[serverlist_cachecount].line1, sizeof(serverlist_cache[serverlist_cachecount].info.line1), "%i %s", serverlist_cache[serverlist_cachecount].info.ping, serverlist_cache[serverlist_cachecount].info.name );
 561                 ServerList_ViewList_Insert( &serverlist_cache[serverlist_cachecount] );
 562                 serverlist_cachecount++;
 563         }
 564 }
 565 #endif
 566
 567 void ServerList_QueryList(qboolean resetcache, qboolean querydp, qboolean queryqw, qboolean consoleoutput)
 568 {
 569         masterquerytime = realtime;
 570         masterquerycount = 0;
 571         masterreplycount = 0;
 572         if( resetcache ) {
 573                 serverquerycount = 0;
 574                 serverreplycount = 0;
 575                 serverlist_cachecount = 0;
 576                 serverlist_viewcount = 0;
 577                 serverlist_maxcachecount = 0;
 578                 serverlist_cache = (serverlist_entry_t *)Mem_Realloc(netconn_mempool, (void *)serverlist_cache, sizeof(serverlist_entry_t) * serverlist_maxcachecount);
 579         } else {
 580                 // refresh all entries
 581                 int n;
 582                 for( n = 0 ; n < serverlist_cachecount ; n++ ) {
 583                         serverlist_entry_t *entry = &serverlist_cache[ n ];
 584                         entry->query = SQS_REFRESHING;
 585                         entry->querycounter = 0;
 586                 }
 587         }
 588         serverlist_consoleoutput = consoleoutput;
 589
 590         //_ServerList_Test();
 591
 592         NetConn_QueryMasters(querydp, queryqw);
 593 }
 594
 595 // rest
 596
 597 int NetConn_Read(lhnetsocket_t *mysocket, void *data, int maxlength, lhnetaddress_t *peeraddress)
 598 {
 599         int length = LHNET_Read(mysocket, data, maxlength, peeraddress);
 600         int i;
 601         if (length == 0)
 602                 return 0;
 603         if (cl_netpacketloss_receive.integer)
 604                 for (i = 0;i < cl_numsockets;i++)
 605                         if (cl_sockets[i] == mysocket && (rand() % 100) < cl_netpacketloss_receive.integer)
 606                                 return 0;
 607         if (developer_networking.integer)
 608         {
 609                 char addressstring[128], addressstring2[128];
 610                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
 611                 if (length > 0)
 612                 {
 613                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 614                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i from %s:\n", (void *)mysocket, addressstring, (void *)data, maxlength, (void *)peeraddress, length, addressstring2);
 615                         Com_HexDumpToConsole((unsigned char *)data, length);
 616                 }
 617                 else
 618                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i\n", (void *)mysocket, addressstring, (void *)data, maxlength, (void *)peeraddress, length);
 619         }
 620         return length;
 621 }
 622
 623 int NetConn_Write(lhnetsocket_t *mysocket, const void *data, int length, const lhnetaddress_t *peeraddress)
 624 {
 625         int ret;
 626         int i;
 627         if (cl_netpacketloss_send.integer)
 628                 for (i = 0;i < cl_numsockets;i++)
 629                         if (cl_sockets[i] == mysocket && (rand() % 100) < cl_netpacketloss_send.integer)
 630                                 return length;
 631         ret = LHNET_Write(mysocket, data, length, peeraddress);
 632         if (developer_networking.integer)
 633         {
 634                 char addressstring[128], addressstring2[128];
 635                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
 636                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 637                 Con_Printf("LHNET_Write(%p (%s), %p, %i, %p (%s)) = %i%s\n", (void *)mysocket, addressstring, (void *)data, length, (void *)peeraddress, addressstring2, length, ret == length ? "" : " (ERROR)");
 638                 Com_HexDumpToConsole((unsigned char *)data, length);
 639         }
 640         return ret;
 641 }
 642
 643 int NetConn_WriteString(lhnetsocket_t *mysocket, const char *string, const lhnetaddress_t *peeraddress)
 644 {
 645         // note this does not include the trailing NULL because we add that in the parser
 646         return NetConn_Write(mysocket, string, (int)strlen(string), peeraddress);
 647 }
 648
 649 qboolean NetConn_CanSend(netconn_t *conn)
 650 {
 651         conn->outgoing_packetcounter = (conn->outgoing_packetcounter + 1) % NETGRAPH_PACKETS;
 652         conn->outgoing_netgraph[conn->outgoing_packetcounter].time            = realtime;
 653         conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes = NETGRAPH_NOPACKET;
 654         conn->outgoing_netgraph[conn->outgoing_packetcounter].reliablebytes   = NETGRAPH_NOPACKET;
 655         conn->outgoing_netgraph[conn->outgoing_packetcounter].ackbytes        = NETGRAPH_NOPACKET;
 656         if (realtime > conn->cleartime)
 657                 return true;
 658         else
 659         {
 660                 conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes = NETGRAPH_CHOKEDPACKET;
 661                 return false;
 662         }
 663 }
 664
 665 int NetConn_SendUnreliableMessage(netconn_t *conn, sizebuf_t *data, protocolversion_t protocol, int rate, qboolean quakesignon_suppressreliables)
 666 {
 667         int totallen = 0;
 668
 669         // if this packet was supposedly choked, but we find ourselves sending one
 670         // anyway, make sure the size counting starts at zero
 671         // (this mostly happens on level changes and disconnects and such)
 672         if (conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes == NETGRAPH_CHOKEDPACKET)
 673                 conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes = NETGRAPH_NOPACKET;
 674
 675         if (protocol == PROTOCOL_QUAKEWORLD)
 676         {
 677                 int packetLen;
 678                 qboolean sendreliable;
 679
 680                 // note that it is ok to send empty messages to the qw server,
 681                 // otherwise it won't respond to us at all
 682
 683                 sendreliable = false;
 684                 // if the remote side dropped the last reliable message, resend it
 685                 if (conn->qw.incoming_acknowledged > conn->qw.last_reliable_sequence && conn->qw.incoming_reliable_acknowledged != conn->qw.reliable_sequence)
 686                         sendreliable = true;
 687                 // if the reliable transmit buffer is empty, copy the current message out
 688                 if (!conn->sendMessageLength && conn->message.cursize)
 689                 {
 690                         memcpy (conn->sendMessage, conn->message.data, conn->message.cursize);
 691                         conn->sendMessageLength = conn->message.cursize;
 692                         SZ_Clear(&conn->message); // clear the message buffer
 693                         conn->qw.reliable_sequence ^= 1;
 694                         sendreliable = true;
 695                 }
 696                 // outgoing unreliable packet number, and outgoing reliable packet number (0 or 1)
 697                 StoreLittleLong(sendbuffer, (unsigned int)conn->outgoing_unreliable_sequence | ((unsigned int)sendreliable<<31));
 698                 // last received unreliable packet number, and last received reliable packet number (0 or 1)
 699                 StoreLittleLong(sendbuffer + 4, (unsigned int)conn->qw.incoming_sequence | ((unsigned int)conn->qw.incoming_reliable_sequence<<31));
 700                 packetLen = 8;
 701                 conn->outgoing_unreliable_sequence++;
 702                 // client sends qport in every packet
 703                 if (conn == cls.netcon)
 704                 {
 705                         *((short *)(sendbuffer + 8)) = LittleShort(cls.qw_qport);
 706                         packetLen += 2;
 707                         // also update cls.qw_outgoing_sequence
 708                         cls.qw_outgoing_sequence = conn->outgoing_unreliable_sequence;
 709                 }
 710                 if (packetLen + (sendreliable ? conn->sendMessageLength : 0) > 1400)
 711                 {
 712                         Con_Printf ("NetConn_SendUnreliableMessage: reliable message too big %u\n", data->cursize);
 713                         return -1;
 714                 }
 715
 716                 conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes += packetLen + 28;
 717
 718                 // add the reliable message if there is one
 719                 if (sendreliable)
 720                 {
 721                         conn->outgoing_netgraph[conn->outgoing_packetcounter].reliablebytes += conn->sendMessageLength + 28;
 722                         memcpy(sendbuffer + packetLen, conn->sendMessage, conn->sendMessageLength);
 723                         packetLen += conn->sendMessageLength;
 724                         conn->qw.last_reliable_sequence = conn->outgoing_unreliable_sequence;
 725                 }
 726
 727                 // add the unreliable message if possible
 728                 if (packetLen + data->cursize <= 1400)
 729                 {
 730                         conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes += data->cursize + 28;
 731                         memcpy(sendbuffer + packetLen, data->data, data->cursize);
 732                         packetLen += data->cursize;
 733                 }
 734
 735                 NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress);
 736
 737                 packetsSent++;
 738                 unreliableMessagesSent++;
 739
 740                 totallen += packetLen + 28;
 741         }
 742         else
 743         {
 744                 unsigned int packetLen;
 745                 unsigned int dataLen;
 746                 unsigned int eom;
 747                 const void *sendme;
 748                 size_t sendmelen;
 749
 750                 // if a reliable message fragment has been lost, send it again
 751                 if (conn->sendMessageLength && (realtime - conn->lastSendTime) > 1.0)
 752                 {
 753                         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 754                         {
 755                                 dataLen = conn->sendMessageLength;
 756                                 eom = NETFLAG_EOM;
 757                         }
 758                         else
 759                         {
 760                                 dataLen = MAX_PACKETFRAGMENT;
 761                                 eom = 0;
 762                         }
 763
 764                         packetLen = NET_HEADERSIZE + dataLen;
 765
 766                         StoreBigLong(sendbuffer, packetLen | (NETFLAG_DATA | eom));
 767                         StoreBigLong(sendbuffer + 4, conn->nq.sendSequence - 1);
 768                         memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
 769
 770                         conn->outgoing_netgraph[conn->outgoing_packetcounter].reliablebytes += packetLen + 28;
 771
 772                         sendme = Crypto_EncryptPacket(&conn->crypto, &sendbuffer, packetLen, &cryptosendbuffer, &sendmelen, sizeof(cryptosendbuffer));
 773                         if (sendme && NetConn_Write(conn->mysocket, sendme, sendmelen, &conn->peeraddress) == (int)sendmelen)
 774                         {
 775                                 conn->lastSendTime = realtime;
 776                                 packetsReSent++;
 777                         }
 778
 779                         totallen += sendmelen + 28;
 780                 }
 781
 782                 // if we have a new reliable message to send, do so
 783                 if (!conn->sendMessageLength && conn->message.cursize && !quakesignon_suppressreliables)
 784                 {
 785                         if (conn->message.cursize > (int)sizeof(conn->sendMessage))
 786                         {
 787                                 Con_Printf("NetConn_SendUnreliableMessage: reliable message too big (%u > %u)\n", conn->message.cursize, (int)sizeof(conn->sendMessage));
 788                                 conn->message.overflowed = true;
 789                                 return -1;
 790                         }
 791
 792                         if (developer_networking.integer && conn == cls.netcon)
 793                         {
 794                                 Con_Print("client sending reliable message to server:\n");
 795                                 SZ_HexDumpToConsole(&conn->message);
 796                         }
 797
 798                         memcpy(conn->sendMessage, conn->message.data, conn->message.cursize);
 799                         conn->sendMessageLength = conn->message.cursize;
 800                         SZ_Clear(&conn->message);
 801
 802                         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 803                         {
 804                                 dataLen = conn->sendMessageLength;
 805                                 eom = NETFLAG_EOM;
 806                         }
 807                         else
 808                         {
 809                                 dataLen = MAX_PACKETFRAGMENT;
 810                                 eom = 0;
 811                         }
 812
 813                         packetLen = NET_HEADERSIZE + dataLen;
 814
 815                         StoreBigLong(sendbuffer, packetLen | (NETFLAG_DATA | eom));
 816                         StoreBigLong(sendbuffer + 4, conn->nq.sendSequence);
 817                         memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
 818
 819                         conn->nq.sendSequence++;
 820
 821                         conn->outgoing_netgraph[conn->outgoing_packetcounter].reliablebytes += packetLen + 28;
 822
 823                         sendme = Crypto_EncryptPacket(&conn->crypto, &sendbuffer, packetLen, &cryptosendbuffer, &sendmelen, sizeof(cryptosendbuffer));
 824                         if(sendme)
 825                                 NetConn_Write(conn->mysocket, sendme, sendmelen, &conn->peeraddress);
 826
 827                         conn->lastSendTime = realtime;
 828                         packetsSent++;
 829                         reliableMessagesSent++;
 830
 831                         totallen += sendmelen + 28;
 832                 }
 833
 834                 // if we have an unreliable message to send, do so
 835                 if (data->cursize)
 836                 {
 837                         packetLen = NET_HEADERSIZE + data->cursize;
 838
 839                         if (packetLen > (int)sizeof(sendbuffer))
 840                         {
 841                                 Con_Printf("NetConn_SendUnreliableMessage: message too big %u\n", data->cursize);
 842                                 return -1;
 843                         }
 844
 845                         StoreBigLong(sendbuffer, packetLen | NETFLAG_UNRELIABLE);
 846                         StoreBigLong(sendbuffer + 4, conn->outgoing_unreliable_sequence);
 847                         memcpy(sendbuffer + NET_HEADERSIZE, data->data, data->cursize);
 848
 849                         conn->outgoing_unreliable_sequence++;
 850
 851                         conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes += packetLen + 28;
 852
 853                         sendme = Crypto_EncryptPacket(&conn->crypto, &sendbuffer, packetLen, &cryptosendbuffer, &sendmelen, sizeof(cryptosendbuffer));
 854                         if(sendme)
 855                                 NetConn_Write(conn->mysocket, sendme, sendmelen, &conn->peeraddress);
 856
 857                         packetsSent++;
 858                         unreliableMessagesSent++;
 859
 860                         totallen += sendmelen + 28;
 861                 }
 862         }
 863
 864         // delay later packets to obey rate limit
 865         if (conn->cleartime < realtime - 0.1)
 866                 conn->cleartime = realtime - 0.1;
 867         conn->cleartime = conn->cleartime + (double)totallen / (double)rate;
 868         if (conn->cleartime < realtime)
 869                 conn->cleartime = realtime;
 870
 871         return 0;
 872 }
 873
 874 qboolean NetConn_HaveClientPorts(void)
 875 {
 876         return !!cl_numsockets;
 877 }
 878
 879 qboolean NetConn_HaveServerPorts(void)
 880 {
 881         return !!sv_numsockets;
 882 }
 883
 884 void NetConn_CloseClientPorts(void)
 885 {
 886         for (;cl_numsockets > 0;cl_numsockets--)
 887                 if (cl_sockets[cl_numsockets - 1])
 888                         LHNET_CloseSocket(cl_sockets[cl_numsockets - 1]);
 889 }
 890
 891 void NetConn_OpenClientPort(const char *addressstring, lhnetaddresstype_t addresstype, int defaultport)
 892 {
 893         lhnetaddress_t address;
 894         lhnetsocket_t *s;
 895         int success;
 896         char addressstring2[1024];
 897         if (addressstring && addressstring[0])
 898                 success = LHNETADDRESS_FromString(&address, addressstring, defaultport);
 899         else
 900                 success = LHNETADDRESS_FromPort(&address, addresstype, defaultport);
 901         if (success)
 902         {
 903                 if ((s = LHNET_OpenSocket_Connectionless(&address)))
 904                 {
 905                         cl_sockets[cl_numsockets++] = s;
 906                         LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
 907                         if (addresstype != LHNETADDRESSTYPE_LOOP)
 908                                 Con_Printf("Client opened a socket on address %s\n", addressstring2);
 909                 }
 910                 else
 911                 {
 912                         LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
 913                         Con_Printf("Client failed to open a socket on address %s\n", addressstring2);
 914                 }
 915         }
 916         else
 917                 Con_Printf("Client unable to parse address %s\n", addressstring);
 918 }
 919
 920 void NetConn_OpenClientPorts(void)
 921 {
 922         int port;
 923         NetConn_CloseClientPorts();
 924         port = bound(0, cl_netport.integer, 65535);
 925         if (cl_netport.integer != port)
 926                 Cvar_SetValueQuick(&cl_netport, port);
 927         if(port == 0)
 928                 Con_Printf("Client using an automatically assigned port\n");
 929         else
 930                 Con_Printf("Client using port %i\n", port);
 931         NetConn_OpenClientPort(NULL, LHNETADDRESSTYPE_LOOP, 2);
 932         NetConn_OpenClientPort(net_address.string, LHNETADDRESSTYPE_INET4, port);
 933 #ifdef SUPPORTIPV6
 934         NetConn_OpenClientPort(net_address_ipv6.string, LHNETADDRESSTYPE_INET6, port);
 935 #endif
 936 }
 937
 938 void NetConn_CloseServerPorts(void)
 939 {
 940         for (;sv_numsockets > 0;sv_numsockets--)
 941                 if (sv_sockets[sv_numsockets - 1])
 942                         LHNET_CloseSocket(sv_sockets[sv_numsockets - 1]);
 943 }
 944
 945 qboolean NetConn_OpenServerPort(const char *addressstring, lhnetaddresstype_t addresstype, int defaultport, int range)
 946 {
 947         lhnetaddress_t address;
 948         lhnetsocket_t *s;
 949         int port;
 950         char addressstring2[1024];
 951         int success;
 952
 953         for (port = defaultport; port <= defaultport + range; port++)
 954         {
 955                 if (addressstring && addressstring[0])
 956                         success = LHNETADDRESS_FromString(&address, addressstring, port);
 957                 else
 958                         success = LHNETADDRESS_FromPort(&address, addresstype, port);
 959                 if (success)
 960                 {
 961                         if ((s = LHNET_OpenSocket_Connectionless(&address)))
 962                         {
 963                                 sv_sockets[sv_numsockets++] = s;
 964                                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
 965                                 if (addresstype != LHNETADDRESSTYPE_LOOP)
 966                                         Con_Printf("Server listening on address %s\n", addressstring2);
 967                                 return true;
 968                         }
 969                         else
 970                         {
 971                                 LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
 972                                 Con_Printf("Server failed to open socket on address %s\n", addressstring2);
 973                         }
 974                 }
 975                 else
 976                 {
 977                         Con_Printf("Server unable to parse address %s\n", addressstring);
 978                         // if it cant parse one address, it wont be able to parse another for sure
 979                         return false;
 980                 }
 981         }
 982         return false;
 983 }
 984
 985 void NetConn_OpenServerPorts(int opennetports)
 986 {
 987         int port;
 988         NetConn_CloseServerPorts();
 989         NetConn_UpdateSockets();
 990         port = bound(0, sv_netport.integer, 65535);
 991         if (port == 0)
 992                 port = 26000;
 993         Con_Printf("Server using port %i\n", port);
 994         if (sv_netport.integer != port)
 995                 Cvar_SetValueQuick(&sv_netport, port);
 996         if (cls.state != ca_dedicated)
 997                 NetConn_OpenServerPort(NULL, LHNETADDRESSTYPE_LOOP, 1, 1);
 998         if (opennetports)
 999         {
1000 #ifdef SUPPORTIPV6
1001                 qboolean ip4success = NetConn_OpenServerPort(net_address.string, LHNETADDRESSTYPE_INET4, port, 100);
1002                 NetConn_OpenServerPort(net_address_ipv6.string, LHNETADDRESSTYPE_INET6, port, ip4success ? 1 : 100);
1003 #else
1004                 NetConn_OpenServerPort(net_address.string, LHNETADDRESSTYPE_INET4, port, 100);
1005 #endif
1006         }
1007         if (sv_numsockets == 0)
1008                 Host_Error("NetConn_OpenServerPorts: unable to open any ports!");
1009 }
1010
1011 lhnetsocket_t *NetConn_ChooseClientSocketForAddress(lhnetaddress_t *address)
1012 {
1013         int i, a = LHNETADDRESS_GetAddressType(address);
1014         for (i = 0;i < cl_numsockets;i++)
1015                 if (cl_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])) == a)
1016                         return cl_sockets[i];
1017         return NULL;
1018 }
1019
1020 lhnetsocket_t *NetConn_ChooseServerSocketForAddress(lhnetaddress_t *address)
1021 {
1022         int i, a = LHNETADDRESS_GetAddressType(address);
1023         for (i = 0;i < sv_numsockets;i++)
1024                 if (sv_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(sv_sockets[i])) == a)
1025                         return sv_sockets[i];
1026         return NULL;
1027 }
1028
1029 netconn_t *NetConn_Open(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress)
1030 {
1031         netconn_t *conn;
1032         conn = (netconn_t *)Mem_Alloc(netconn_mempool, sizeof(*conn));
1033         conn->mysocket = mysocket;
1034         conn->peeraddress = *peeraddress;
1035         conn->lastMessageTime = realtime;
1036         conn->message.data = conn->messagedata;
1037         conn->message.maxsize = sizeof(conn->messagedata);
1038         conn->message.cursize = 0;
1039         // LordHavoc: (inspired by ProQuake) use a short connect timeout to
1040         // reduce effectiveness of connection request floods
1041         conn->timeout = realtime + net_connecttimeout.value;
1042         LHNETADDRESS_ToString(&conn->peeraddress, conn->address, sizeof(conn->address), true);
1043         conn->next = netconn_list;
1044         netconn_list = conn;
1045         return conn;
1046 }
1047
1048 void NetConn_ClearConnectFlood(lhnetaddress_t *peeraddress);
1049 void NetConn_Close(netconn_t *conn)
1050 {
1051         netconn_t *c;
1052         // remove connection from list
1053
1054         // allow the client to reconnect immediately
1055         NetConn_ClearConnectFlood(&(conn->peeraddress));
1056
1057         if (conn == netconn_list)
1058                 netconn_list = conn->next;
1059         else
1060         {
1061                 for (c = netconn_list;c;c = c->next)
1062                 {
1063                         if (c->next == conn)
1064                         {
1065                                 c->next = conn->next;
1066                                 break;
1067                         }
1068                 }
1069                 // not found in list, we'll avoid crashing here...
1070                 if (!c)
1071                         return;
1072         }
1073         // free connection
1074         Mem_Free(conn);
1075 }
1076
1077 static int clientport = -1;
1078 static int clientport2 = -1;
1079 static int hostport = -1;
1080 void NetConn_UpdateSockets(void)
1081 {
1082         int i, j;
1083
1084         if (cls.state != ca_dedicated)
1085         {
1086                 if (clientport2 != cl_netport.integer)
1087                 {
1088                         clientport2 = cl_netport.integer;
1089                         if (cls.state == ca_connected)
1090                                 Con_Print("Changing \"cl_port\" will not take effect until you reconnect.\n");
1091                 }
1092                 if (cls.state == ca_disconnected && clientport != clientport2)
1093                 {
1094                         clientport = clientport2;
1095                         NetConn_CloseClientPorts();
1096                 }
1097                 if (cl_numsockets == 0)
1098                         NetConn_OpenClientPorts();
1099         }
1100
1101         if (hostport != sv_netport.integer)
1102         {
1103                 hostport = sv_netport.integer;
1104                 if (sv.active)
1105                         Con_Print("Changing \"port\" will not take effect until \"map\" command is executed.\n");
1106         }
1107
1108         for (j = 0;j < MAX_RCONS;j++)
1109         {
1110                 i = (cls.rcon_ringpos + j + 1) % MAX_RCONS;
1111                 if(cls.rcon_commands[i][0])
1112                 {
1113                         if(realtime > cls.rcon_timeout[i])
1114                         {
1115                                 char s[128];
1116                                 LHNETADDRESS_ToString(&cls.rcon_addresses[i], s, sizeof(s), true);
1117                                 Con_Printf("rcon to %s (for command %s) failed: challenge request timed out\n", s, cls.rcon_commands[i]);
1118                                 cls.rcon_commands[i][0] = 0;
1119                                 --cls.rcon_trying;
1120                                 break;
1121                         }
1122                 }
1123         }
1124 }
1125
1126 static int NetConn_ReceivedMessage(netconn_t *conn, const unsigned char *data, size_t length, protocolversion_t protocol, double newtimeout)
1127 {
1128         int originallength = length;
1129         if (length < 8)
1130                 return 0;
1131
1132         if (protocol == PROTOCOL_QUAKEWORLD)
1133         {
1134                 int sequence, sequence_ack;
1135                 int reliable_ack, reliable_message;
1136                 int count;
1137                 //int qport;
1138
1139                 sequence = LittleLong(*((int *)(data + 0)));
1140                 sequence_ack = LittleLong(*((int *)(data + 4)));
1141                 data += 8;
1142                 length -= 8;
1143
1144                 if (conn != cls.netcon)
1145                 {
1146                         // server only
1147                         if (length < 2)
1148                                 return 0;
1149                         // TODO: use qport to identify that this client really is who they say they are?  (and elsewhere in the code to identify the connection without a port match?)
1150                         //qport = LittleShort(*((int *)(data + 8)));
1151                         data += 2;
1152                         length -= 2;
1153                 }
1154
1155                 packetsReceived++;
1156                 reliable_message = (sequence >> 31) & 1;
1157                 reliable_ack = (sequence_ack >> 31) & 1;
1158                 sequence &= ~(1<<31);
1159                 sequence_ack &= ~(1<<31);
1160                 if (sequence <= conn->qw.incoming_sequence)
1161                 {
1162                         //Con_DPrint("Got a stale datagram\n");
1163                         return 0;
1164                 }
1165                 count = sequence - (conn->qw.incoming_sequence + 1);
1166                 if (count > 0)
1167                 {
1168                         droppedDatagrams += count;
1169                         //Con_DPrintf("Dropped %u datagram(s)\n", count);
1170                         while (count--)
1171                         {
1172                                 conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS;
1173                                 conn->incoming_netgraph[conn->incoming_packetcounter].time            = realtime;
1174                                 conn->incoming_netgraph[conn->incoming_packetcounter].unreliablebytes = NETGRAPH_LOSTPACKET;
1175                                 conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes   = NETGRAPH_NOPACKET;
1176                                 conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes        = NETGRAPH_NOPACKET;
1177                         }
1178                 }
1179                 conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS;
1180                 conn->incoming_netgraph[conn->incoming_packetcounter].time            = realtime;
1181                 conn->incoming_netgraph[conn->incoming_packetcounter].unreliablebytes = originallength + 28;
1182                 conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes   = NETGRAPH_NOPACKET;
1183                 conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes        = NETGRAPH_NOPACKET;
1184                 if (reliable_ack == conn->qw.reliable_sequence)
1185                 {
1186                         // received, now we will be able to send another reliable message
1187                         conn->sendMessageLength = 0;
1188                         reliableMessagesReceived++;
1189                 }
1190                 conn->qw.incoming_sequence = sequence;
1191                 if (conn == cls.netcon)
1192                         cls.qw_incoming_sequence = conn->qw.incoming_sequence;
1193                 conn->qw.incoming_acknowledged = sequence_ack;
1194                 conn->qw.incoming_reliable_acknowledged = reliable_ack;
1195                 if (reliable_message)
1196                         conn->qw.incoming_reliable_sequence ^= 1;
1197                 conn->lastMessageTime = realtime;
1198                 conn->timeout = realtime + newtimeout;
1199                 unreliableMessagesReceived++;
1200                 SZ_Clear(&net_message);
1201                 SZ_Write(&net_message, data, length);
1202                 MSG_BeginReading();
1203                 return 2;
1204         }
1205         else
1206         {
1207                 unsigned int count;
1208                 unsigned int flags;
1209                 unsigned int sequence;
1210                 size_t qlength;
1211                 const void *sendme;
1212                 size_t sendmelen;
1213
1214                 originallength = length;
1215                 data = (const unsigned char *) Crypto_DecryptPacket(&conn->crypto, data, length, cryptoreadbuffer, &length, sizeof(cryptoreadbuffer));
1216                 if(!data)
1217                         return 0;
1218                 if(length < 8)
1219                         return 0;
1220
1221                 qlength = (unsigned int)BuffBigLong(data);
1222                 flags = qlength & ~NETFLAG_LENGTH_MASK;
1223                 qlength &= NETFLAG_LENGTH_MASK;
1224                 // control packets were already handled
1225                 if (!(flags & NETFLAG_CTL) && qlength == length)
1226                 {
1227                         sequence = BuffBigLong(data + 4);
1228                         packetsReceived++;
1229                         data += 8;
1230                         length -= 8;
1231                         if (flags & NETFLAG_UNRELIABLE)
1232                         {
1233                                 if (sequence >= conn->nq.unreliableReceiveSequence)
1234                                 {
1235                                         if (sequence > conn->nq.unreliableReceiveSequence)
1236                                         {
1237                                                 count = sequence - conn->nq.unreliableReceiveSequence;
1238                                                 droppedDatagrams += count;
1239                                                 //Con_DPrintf("Dropped %u datagram(s)\n", count);
1240                                                 while (count--)
1241                                                 {
1242                                                         conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS;
1243                                                         conn->incoming_netgraph[conn->incoming_packetcounter].time            = realtime;
1244                                                         conn->incoming_netgraph[conn->incoming_packetcounter].unreliablebytes = NETGRAPH_LOSTPACKET;
1245                                                         conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes   = NETGRAPH_NOPACKET;
1246                                                         conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes        = NETGRAPH_NOPACKET;
1247                                                 }
1248                                         }
1249                                         conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS;
1250                                         conn->incoming_netgraph[conn->incoming_packetcounter].time            = realtime;
1251                                         conn->incoming_netgraph[conn->incoming_packetcounter].unreliablebytes = originallength + 28;
1252                                         conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes   = NETGRAPH_NOPACKET;
1253                                         conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes        = NETGRAPH_NOPACKET;
1254                                         conn->nq.unreliableReceiveSequence = sequence + 1;
1255                                         conn->lastMessageTime = realtime;
1256                                         conn->timeout = realtime + newtimeout;
1257                                         unreliableMessagesReceived++;
1258                                         if (length > 0)
1259                                         {
1260                                                 SZ_Clear(&net_message);
1261                                                 SZ_Write(&net_message, data, length);
1262                                                 MSG_BeginReading();
1263                                                 return 2;
1264                                         }
1265                                 }
1266                                 //else
1267                                 //      Con_DPrint("Got a stale datagram\n");
1268                                 return 1;
1269                         }
1270                         else if (flags & NETFLAG_ACK)
1271                         {
1272                                 conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes += originallength + 28;
1273                                 if (sequence == (conn->nq.sendSequence - 1))
1274                                 {
1275                                         if (sequence == conn->nq.ackSequence)
1276                                         {
1277                                                 conn->nq.ackSequence++;
1278                                                 if (conn->nq.ackSequence != conn->nq.sendSequence)
1279                                                         Con_DPrint("ack sequencing error\n");
1280                                                 conn->lastMessageTime = realtime;
1281                                                 conn->timeout = realtime + newtimeout;
1282                                                 if (conn->sendMessageLength > MAX_PACKETFRAGMENT)
1283                                                 {
1284                                                         unsigned int packetLen;
1285                                                         unsigned int dataLen;
1286                                                         unsigned int eom;
1287
1288                                                         conn->sendMessageLength -= MAX_PACKETFRAGMENT;
1289                                                         memmove(conn->sendMessage, conn->sendMessage+MAX_PACKETFRAGMENT, conn->sendMessageLength);
1290
1291                                                         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
1292                                                         {
1293                                                                 dataLen = conn->sendMessageLength;
1294                                                                 eom = NETFLAG_EOM;
1295                                                         }
1296                                                         else
1297                                                         {
1298                                                                 dataLen = MAX_PACKETFRAGMENT;
1299                                                                 eom = 0;
1300                                                         }
1301
1302                                                         packetLen = NET_HEADERSIZE + dataLen;
1303
1304                                                         StoreBigLong(sendbuffer, packetLen | (NETFLAG_DATA | eom));
1305                                                         StoreBigLong(sendbuffer + 4, conn->nq.sendSequence);
1306                                                         memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
1307
1308                                                         conn->nq.sendSequence++;
1309
1310                                                         sendme = Crypto_EncryptPacket(&conn->crypto, &sendbuffer, packetLen, &cryptosendbuffer, &sendmelen, sizeof(cryptosendbuffer));
1311                                                         if (sendme && NetConn_Write(conn->mysocket, sendme, sendmelen, &conn->peeraddress) == (int)sendmelen)
1312                                                         {
1313                                                                 conn->lastSendTime = realtime;
1314                                                                 packetsSent++;
1315                                                         }
1316                                                 }
1317                                                 else
1318                                                         conn->sendMessageLength = 0;
1319                                         }
1320                                         //else
1321                                         //      Con_DPrint("Duplicate ACK received\n");
1322                                 }
1323                                 //else
1324                                 //      Con_DPrint("Stale ACK received\n");
1325                                 return 1;
1326                         }
1327                         else if (flags & NETFLAG_DATA)
1328                         {
1329                                 unsigned char temppacket[8];
1330                                 conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes   += originallength + 28;
1331                                 conn->outgoing_netgraph[conn->outgoing_packetcounter].ackbytes        += 8 + 28;
1332                                 StoreBigLong(temppacket, 8 | NETFLAG_ACK);
1333                                 StoreBigLong(temppacket + 4, sequence);
1334                                 sendme = Crypto_EncryptPacket(&conn->crypto, temppacket, 8, &cryptosendbuffer, &sendmelen, sizeof(cryptosendbuffer));
1335                                 if(sendme)
1336                                         NetConn_Write(conn->mysocket, sendme, sendmelen, &conn->peeraddress);
1337                                 if (sequence == conn->nq.receiveSequence)
1338                                 {
1339                                         conn->lastMessageTime = realtime;
1340                                         conn->timeout = realtime + newtimeout;
1341                                         conn->nq.receiveSequence++;
1342                                         if( conn->receiveMessageLength + length <= (int)sizeof( conn->receiveMessage ) ) {
1343                                                 memcpy(conn->receiveMessage + conn->receiveMessageLength, data, length);
1344                                                 conn->receiveMessageLength += length;
1345                                         } else {
1346                                                 Con_Printf( "Reliable message (seq: %i) too big for message buffer!\n"
1347                                                                         "Dropping the message!\n", sequence );
1348                                                 conn->receiveMessageLength = 0;
1349                                                 return 1;
1350                                         }
1351                                         if (flags & NETFLAG_EOM)
1352                                         {
1353                                                 reliableMessagesReceived++;
1354                                                 length = conn->receiveMessageLength;
1355                                                 conn->receiveMessageLength = 0;
1356                                                 if (length > 0)
1357                                                 {
1358                                                         SZ_Clear(&net_message);
1359                                                         SZ_Write(&net_message, conn->receiveMessage, length);
1360                                                         MSG_BeginReading();
1361                                                         return 2;
1362                                                 }
1363                                         }
1364                                 }
1365                                 else
1366                                         receivedDuplicateCount++;
1367                                 return 1;
1368                         }
1369                 }
1370         }
1371         return 0;
1372 }
1373
1374 void NetConn_ConnectionEstablished(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress, protocolversion_t initialprotocol)
1375 {
1376         crypto_t *crypto;
1377         cls.connect_trying = false;
1378         M_Update_Return_Reason("");
1379         // the connection request succeeded, stop current connection and set up a new connection
1380         CL_Disconnect();
1381         // if we're connecting to a remote server, shut down any local server
1382         if (LHNETADDRESS_GetAddressType(peeraddress) != LHNETADDRESSTYPE_LOOP && sv.active)
1383                 Host_ShutdownServer ();
1384         // allocate a net connection to keep track of things
1385         cls.netcon = NetConn_Open(mysocket, peeraddress);
1386         crypto = &cls.crypto;
1387         if(crypto && crypto->authenticated)
1388         {
1389                 Crypto_ServerFinishInstance(&cls.netcon->crypto, crypto);
1390                 Con_Printf("%s connection to %s has been established: server is %s@%.*s, I am %.*s@%.*s\n",
1391                                 crypto->use_aes ? "Encrypted" : "Authenticated",
1392                                 cls.netcon->address,
1393                                 crypto->server_idfp[0] ? crypto->server_idfp : "-",
1394                                 crypto_keyfp_recommended_length, crypto->server_keyfp[0] ? crypto->server_keyfp : "-",
1395                                 crypto_keyfp_recommended_length, crypto->client_idfp[0] ? crypto->client_idfp : "-",
1396                                 crypto_keyfp_recommended_length, crypto->client_keyfp[0] ? crypto->client_keyfp : "-"
1397                                 );
1398         }
1399         Con_Printf("Connection accepted to %s\n", cls.netcon->address);
1400         key_dest = key_game;
1401         m_state = m_none;
1402         cls.demonum = -1;                       // not in the demo loop now
1403         cls.state = ca_connected;
1404         cls.signon = 0;                         // need all the signon messages before playing
1405         cls.protocol = initialprotocol;
1406         // reset move sequence numbering on this new connection
1407         cls.servermovesequence = 0;
1408         if (cls.protocol == PROTOCOL_QUAKEWORLD)
1409                 Cmd_ForwardStringToServer("new");
1410         if (cls.protocol == PROTOCOL_QUAKE)
1411         {
1412                 // write a keepalive (clc_nop) as it seems to greatly improve the
1413                 // chances of connecting to a netquake server
1414                 sizebuf_t msg;
1415                 unsigned char buf[4];
1416                 memset(&msg, 0, sizeof(msg));
1417                 msg.data = buf;
1418                 msg.maxsize = sizeof(buf);
1419                 MSG_WriteChar(&msg, clc_nop);
1420                 NetConn_SendUnreliableMessage(cls.netcon, &msg, cls.protocol, 10000, false);
1421         }
1422 }
1423
1424 int NetConn_IsLocalGame(void)
1425 {
1426         if (cls.state == ca_connected && sv.active && cl.maxclients == 1)
1427                 return true;
1428         return false;
1429 }
1430
1431 static int NetConn_ClientParsePacket_ServerList_ProcessReply(const char *addressstring)
1432 {
1433         int n;
1434         int pingtime;
1435         serverlist_entry_t *entry = NULL;
1436
1437         // search the cache for this server and update it
1438         for (n = 0;n < serverlist_cachecount;n++) {
1439                 entry = &serverlist_cache[ n ];
1440                 if (!strcmp(addressstring, entry->info.cname))
1441                         break;
1442         }
1443
1444         if (n == serverlist_cachecount)
1445         {
1446                 // LAN search doesnt require an answer from the master server so we wont
1447                 // know the ping nor will it be initialized already...
1448
1449                 // find a slot
1450                 if (serverlist_cachecount == SERVERLIST_TOTALSIZE)
1451                         return -1;
1452
1453                 if (serverlist_maxcachecount <= serverlist_cachecount)
1454                 {
1455                         serverlist_maxcachecount += 64;
1456                         serverlist_cache = (serverlist_entry_t *)Mem_Realloc(netconn_mempool, (void *)serverlist_cache, sizeof(serverlist_entry_t) * serverlist_maxcachecount);
1457                 }
1458                 entry = &serverlist_cache[n];
1459
1460                 memset(entry, 0, sizeof(*entry));
1461                 // store the data the engine cares about (address and ping)
1462                 strlcpy(entry->info.cname, addressstring, sizeof(entry->info.cname));
1463                 entry->info.ping = 100000;
1464                 entry->querytime = realtime;
1465                 // if not in the slist menu we should print the server to console
1466                 if (serverlist_consoleoutput)
1467                         Con_Printf("querying %s\n", addressstring);
1468                 ++serverlist_cachecount;
1469         }
1470         // if this is the first reply from this server, count it as having replied
1471         pingtime = (int)((realtime - entry->querytime) * 1000.0 + 0.5);
1472         pingtime = bound(0, pingtime, 9999);
1473         if (entry->query == SQS_REFRESHING) {
1474                 entry->info.ping = pingtime;
1475                 entry->query = SQS_QUERIED;
1476         } else {
1477                 // convert to unsigned to catch the -1
1478                 // I still dont like this but its better than the old 10000 magic ping number - as in easier to type and read :( [11/8/2007 Black]
1479                 entry->info.ping = min((unsigned) entry->info.ping, (unsigned) pingtime);
1480                 serverreplycount++;
1481         }
1482
1483         // other server info is updated by the caller
1484         return n;
1485 }
1486
1487 static void NetConn_ClientParsePacket_ServerList_UpdateCache(int n)
1488 {
1489         serverlist_entry_t *entry = &serverlist_cache[n];
1490         serverlist_info_t *info = &entry->info;
1491         // update description strings for engine menu and console output
1492         dpsnprintf(entry->line1, sizeof(serverlist_cache[n].line1), "^%c%5d^7 ^%c%3u^7/%3u %-65.65s", info->ping >= 300 ? '1' : (info->ping >= 200 ? '3' : '7'), (int)info->ping, ((info->numhumans > 0 && info->numhumans < info->maxplayers) ? (info->numhumans >= 4 ? '7' : '3') : '1'), info->numplayers, info->maxplayers, info->name);
1493         dpsnprintf(entry->line2, sizeof(serverlist_cache[n].line2), "^4%-21.21s %-19.19s ^%c%-17.17s^4 %-20.20s", info->cname, info->game,
1494                         (
1495                          info->gameversion != gameversion.integer
1496                          &&
1497                          !(
1498                                     gameversion_min.integer >= 0 // min/max range set by user/mod?
1499                                  && gameversion_max.integer >= 0
1500                                  && gameversion_min.integer >= info->gameversion // version of server in min/max range?
1501                                  && gameversion_max.integer <= info->gameversion
1502                           )
1503                         ) ? '1' : '4',
1504                         info->mod, info->map);
1505         if (entry->query == SQS_QUERIED)
1506         {
1507                 if(!serverlist_paused)
1508                         ServerList_ViewList_Remove(entry);
1509         }
1510         // if not in the slist menu we should print the server to console (if wanted)
1511         else if( serverlist_consoleoutput )
1512                 Con_Printf("%s\n%s\n", serverlist_cache[n].line1, serverlist_cache[n].line2);
1513         // and finally, update the view set
1514         if(!serverlist_paused)
1515                 ServerList_ViewList_Insert( entry );
1516         //      update the entry's state
1517         serverlist_cache[n].query = SQS_QUERIED;
1518 }
1519
1520 // returns true, if it's sensible to continue the processing
1521 static qboolean NetConn_ClientParsePacket_ServerList_PrepareQuery( int protocol, const char *ipstring, qboolean isfavorite ) {
1522         int n;
1523         serverlist_entry_t *entry;
1524
1525         //      ignore the rest of the message if the serverlist is full
1526         if( serverlist_cachecount == SERVERLIST_TOTALSIZE )
1527                 return false;
1528         //      also ignore     it      if      we      have already queried    it      (other master server    response)
1529         for( n =        0 ; n   < serverlist_cachecount ; n++   )
1530                 if( !strcmp( ipstring, serverlist_cache[ n ].info.cname ) )
1531                         break;
1532
1533         if( n < serverlist_cachecount ) {
1534                 // the entry has already been queried once or
1535                 return true;
1536         }
1537
1538         if (serverlist_maxcachecount <= n)
1539         {
1540                 serverlist_maxcachecount += 64;
1541                 serverlist_cache = (serverlist_entry_t *)Mem_Realloc(netconn_mempool, (void *)serverlist_cache, sizeof(serverlist_entry_t) * serverlist_maxcachecount);
1542         }
1543
1544         entry = &serverlist_cache[n];
1545
1546         memset(entry, 0, sizeof(entry));
1547         entry->protocol =       protocol;
1548         //      store   the data        the engine cares about (address and     ping)
1549         strlcpy (entry->info.cname, ipstring, sizeof(entry->info.cname));
1550
1551         entry->info.isfavorite = isfavorite;
1552
1553         // no, then reset the ping right away
1554         entry->info.ping = -1;
1555         // we also want to increase the serverlist_cachecount then
1556         serverlist_cachecount++;
1557         serverquerycount++;
1558
1559         entry->query =  SQS_QUERYING;
1560
1561         return true;
1562 }
1563
1564 static void NetConn_ClientParsePacket_ServerList_ParseDPList(lhnetaddress_t *senderaddress, const unsigned char *data, int length, qboolean isextended)
1565 {
1566         masterreplycount++;
1567         if (serverlist_consoleoutput)
1568                 Con_Printf("received DarkPlaces %sserver list...\n", isextended ? "extended " : "");
1569         while (length >= 7)
1570         {
1571                 char ipstring [128];
1572
1573                 // IPv4 address
1574                 if (data[0] == '\\')
1575                 {
1576                         unsigned short port = data[5] * 256 + data[6];
1577
1578                         if (port != 0 && (data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF || data[4] != 0xFF))
1579                                 dpsnprintf (ipstring, sizeof (ipstring), "%u.%u.%u.%u:%hu", data[1], data[2], data[3], data[4], port);
1580
1581                         // move on to next address in packet
1582                         data += 7;
1583                         length -= 7;
1584                 }
1585                 // IPv6 address
1586                 else if (data[0] == '/' && isextended && length >= 19)
1587                 {
1588                         unsigned short port = data[17] * 256 + data[18];
1589
1590                         if (port != 0)
1591                         {
1592 #ifdef WHY_JUST_WHY
1593                                 const char *ifname;
1594
1595                                 /// \TODO: make some basic checks of the IP address (broadcast, ...)
1596
1597                                 ifname = LHNETADDRESS_GetInterfaceName(senderaddress);
1598                                 if (ifname != NULL)
1599                                 {
1600                                         dpsnprintf (ipstring, sizeof (ipstring), "[%x:%x:%x:%x:%x:%x:%x:%x%%%s]:%hu",
1601                                                                 (data[1] << 8) | data[2], (data[3] << 8) | data[4], (data[5] << 8) | data[6], (data[7] << 8) | data[8],
1602                                                                 (data[9] << 8) | data[10], (data[11] << 8) | data[12], (data[13] << 8) | data[14], (data[15] << 8) | data[16],
1603                                                                 ifname, port);
1604                                 }
1605                                 else
1606 #endif
1607                                 {
1608                                         dpsnprintf (ipstring, sizeof (ipstring), "[%x:%x:%x:%x:%x:%x:%x:%x]:%hu",
1609                                                                 (data[1] << 8) | data[2], (data[3] << 8) | data[4], (data[5] << 8) | data[6], (data[7] << 8) | data[8],
1610                                                                 (data[9] << 8) | data[10], (data[11] << 8) | data[12], (data[13] << 8) | data[14], (data[15] << 8) | data[16],
1611                                                                 port);
1612                                 }
1613                         }
1614
1615                         // move on to next address in packet
1616                         data += 19;
1617                         length -= 19;
1618                 }
1619                 else
1620                 {
1621                         Con_Print("Error while parsing the server list\n");
1622                         break;
1623                 }
1624
1625                 if (serverlist_consoleoutput && developer_networking.integer)
1626                         Con_Printf("Requesting info from DarkPlaces server %s\n", ipstring);
1627
1628                 if( !NetConn_ClientParsePacket_ServerList_PrepareQuery( PROTOCOL_DARKPLACES7, ipstring, false ) ) {
1629                         break;
1630                 }
1631
1632         }
1633
1634         // begin or resume serverlist queries
1635         serverlist_querysleep = false;
1636         serverlist_querywaittime = realtime + 3;
1637 }
1638
1639 static int NetConn_ClientParsePacket(lhnetsocket_t *mysocket, unsigned char *data, int length, lhnetaddress_t *peeraddress)
1640 {
1641         qboolean fromserver;
1642         int ret, c, control;
1643         const char *s;
1644         char *string, addressstring2[128], ipstring[32];
1645         char stringbuf[16384];
1646         char senddata[NET_HEADERSIZE+NET_MAXMESSAGE+CRYPTO_HEADERSIZE];
1647         size_t sendlength;
1648
1649         // quakeworld ingame packet
1650         fromserver = cls.netcon && mysocket == cls.netcon->mysocket && !LHNETADDRESS_Compare(&cls.netcon->peeraddress, peeraddress);
1651
1652         // convert the address to a string incase we need it
1653         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1654
1655         if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
1656         {
1657                 // received a command string - strip off the packaging and put it
1658                 // into our string buffer with NULL termination
1659                 data += 4;
1660                 length -= 4;
1661                 length = min(length, (int)sizeof(stringbuf) - 1);
1662                 memcpy(stringbuf, data, length);
1663                 stringbuf[length] = 0;
1664                 string = stringbuf;
1665
1666                 if (developer_networking.integer)
1667                 {
1668                         Con_Printf("NetConn_ClientParsePacket: %s sent us a command:\n", addressstring2);
1669                         Com_HexDumpToConsole(data, length);
1670                 }
1671
1672                 sendlength = sizeof(senddata) - 4;
1673                 switch(Crypto_ClientParsePacket(string, length, senddata+4, &sendlength, peeraddress))
1674                 {
1675                         case CRYPTO_NOMATCH:
1676                                 // nothing to do
1677                                 break;
1678                         case CRYPTO_MATCH:
1679                                 if(sendlength)
1680                                 {
1681                                         memcpy(senddata, "\377\377\377\377", 4);
1682                                         NetConn_Write(mysocket, senddata, sendlength+4, peeraddress);
1683                                 }
1684                                 break;
1685                         case CRYPTO_DISCARD:
1686                                 if(sendlength)
1687                                 {
1688                                         memcpy(senddata, "\377\377\377\377", 4);
1689                                         NetConn_Write(mysocket, senddata, sendlength+4, peeraddress);
1690                                 }
1691                                 return true;
1692                                 break;
1693                         case CRYPTO_REPLACE:
1694                                 string = senddata+4;
1695                                 length = sendlength;
1696                                 break;
1697                 }
1698
1699                 if (length >= 10 && !memcmp(string, "challenge ", 10) && cls.rcon_trying)
1700                 {
1701                         int i = 0, j;
1702                         for (j = 0;j < MAX_RCONS;j++)
1703                         {
1704                                 // note: this value from i is used outside the loop too...
1705                                 i = (cls.rcon_ringpos + j) % MAX_RCONS;
1706                                 if(cls.rcon_commands[i][0])
1707                                         if (!LHNETADDRESS_Compare(peeraddress, &cls.rcon_addresses[i]))
1708                                                 break;
1709                         }
1710                         if (j < MAX_RCONS)
1711                         {
1712                                 char buf[1500];
1713                                 char argbuf[1500];
1714                                 const char *e;
1715                                 int n;
1716                                 dpsnprintf(argbuf, sizeof(argbuf), "%s %s", string + 10, cls.rcon_commands[i]);
1717                                 memcpy(buf, "\377\377\377\377srcon HMAC-MD4 CHALLENGE ", 29);
1718
1719                                 e = strchr(rcon_password.string, ' ');
1720                                 n = e ? e-rcon_password.string : (int)strlen(rcon_password.string);
1721
1722                                 if(HMAC_MDFOUR_16BYTES((unsigned char *) (buf + 29), (unsigned char *) argbuf, strlen(argbuf), (unsigned char *) rcon_password.string, n))
1723                                 {
1724                                         int k;
1725                                         buf[45] = ' ';
1726                                         strlcpy(buf + 46, argbuf, sizeof(buf) - 46);
1727                                         NetConn_Write(mysocket, buf, 46 + strlen(buf + 46), peeraddress);
1728                                         cls.rcon_commands[i][0] = 0;
1729                                         --cls.rcon_trying;
1730
1731                                         for (k = 0;k < MAX_RCONS;k++)
1732                                                 if(cls.rcon_commands[k][0])
1733                                                         if (!LHNETADDRESS_Compare(peeraddress, &cls.rcon_addresses[k]))
1734                                                                 break;
1735                                         if(k < MAX_RCONS)
1736                                         {
1737                                                 int l;
1738                                                 NetConn_WriteString(mysocket, "\377\377\377\377getchallenge", peeraddress);
1739                                                 // extend the timeout on other requests as we asked for a challenge
1740                                                 for (l = 0;l < MAX_RCONS;l++)
1741                                                         if(cls.rcon_commands[l][0])
1742                                                                 if (!LHNETADDRESS_Compare(peeraddress, &cls.rcon_addresses[l]))
1743                                                                         cls.rcon_timeout[l] = realtime + rcon_secure_challengetimeout.value;
1744                                         }
1745
1746                                         return true; // we used up the challenge, so we can't use this oen for connecting now anyway
1747                                 }
1748                         }
1749                 }
1750                 if (length >= 10 && !memcmp(string, "challenge ", 10) && cls.connect_trying)
1751                 {
1752                         // darkplaces or quake3
1753                         char protocolnames[1400];
1754                         Protocol_Names(protocolnames, sizeof(protocolnames));
1755                         Con_DPrintf("\"%s\" received, sending connect request back to %s\n", string, addressstring2);
1756                         M_Update_Return_Reason("Got challenge response");
1757                         // update the server IP in the userinfo (QW servers expect this, and it is used by the reconnect command)
1758                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ip", addressstring2);
1759                         // TODO: add userinfo stuff here instead of using NQ commands?
1760                         NetConn_WriteString(mysocket, va("\377\377\377\377connect\\protocol\\darkplaces 3\\protocols\\%s%s\\challenge\\%s", protocolnames, cls.connect_userinfo, string + 10), peeraddress);
1761                         return true;
1762                 }
1763                 if (length == 6 && !memcmp(string, "accept", 6) && cls.connect_trying)
1764                 {
1765                         // darkplaces or quake3
1766                         M_Update_Return_Reason("Accepted");
1767                         NetConn_ConnectionEstablished(mysocket, peeraddress, PROTOCOL_DARKPLACES3);
1768                         return true;
1769                 }
1770                 if (length > 7 && !memcmp(string, "reject ", 7) && cls.connect_trying)
1771                 {
1772                         char rejectreason[128];
1773                         cls.connect_trying = false;
1774                         string += 7;
1775                         length = min(length - 7, (int)sizeof(rejectreason) - 1);
1776                         memcpy(rejectreason, string, length);
1777                         rejectreason[length] = 0;
1778                         M_Update_Return_Reason(rejectreason);
1779                         return true;
1780                 }
1781                 if (length >= 15 && !memcmp(string, "statusResponse\x0A", 15))
1782                 {
1783                         serverlist_info_t *info;
1784                         char *p;
1785                         int n;
1786
1787                         string += 15;
1788                         // search the cache for this server and update it
1789                         n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2);
1790                         if (n < 0)
1791                                 return true;
1792
1793                         info = &serverlist_cache[n].info;
1794                         info->game[0] = 0;
1795                         info->mod[0]  = 0;
1796                         info->map[0]  = 0;
1797                         info->name[0] = 0;
1798                         info->qcstatus[0] = 0;
1799                         info->players[0] = 0;
1800                         info->protocol = -1;
1801                         info->numplayers = 0;
1802                         info->numbots = -1;
1803                         info->maxplayers  = 0;
1804                         info->gameversion = 0;
1805
1806                         p = strchr(string, '\n');
1807                         if(p)
1808                         {
1809                                 *p = 0; // cut off the string there
1810                                 ++p;
1811                         }
1812                         else
1813                                 Con_Printf("statusResponse without players block?\n");
1814
1815                         if ((s = SearchInfostring(string, "gamename"     )) != NULL) strlcpy(info->game, s, sizeof (info->game));
1816                         if ((s = SearchInfostring(string, "modname"      )) != NULL) strlcpy(info->mod , s, sizeof (info->mod ));
1817                         if ((s = SearchInfostring(string, "mapname"      )) != NULL) strlcpy(info->map , s, sizeof (info->map ));
1818                         if ((s = SearchInfostring(string, "hostname"     )) != NULL) strlcpy(info->name, s, sizeof (info->name));
1819                         if ((s = SearchInfostring(string, "protocol"     )) != NULL) info->protocol = atoi(s);
1820                         if ((s = SearchInfostring(string, "clients"      )) != NULL) info->numplayers = atoi(s);
1821                         if ((s = SearchInfostring(string, "bots"         )) != NULL) info->numbots = atoi(s);
1822                         if ((s = SearchInfostring(string, "sv_maxclients")) != NULL) info->maxplayers = atoi(s);
1823                         if ((s = SearchInfostring(string, "gameversion"  )) != NULL) info->gameversion = atoi(s);
1824                         if ((s = SearchInfostring(string, "qcstatus"     )) != NULL) strlcpy(info->qcstatus, s, sizeof(info->qcstatus));
1825                         if (p                                               != NULL) strlcpy(info->players, p, sizeof(info->players));
1826                         info->numhumans = info->numplayers - max(0, info->numbots);
1827                         info->freeslots = info->maxplayers - info->numplayers;
1828
1829                         NetConn_ClientParsePacket_ServerList_UpdateCache(n);
1830
1831                         return true;
1832                 }
1833                 if (length >= 13 && !memcmp(string, "infoResponse\x0A", 13))
1834                 {
1835                         serverlist_info_t *info;
1836                         int n;
1837
1838                         string += 13;
1839                         // search the cache for this server and update it
1840                         n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2);
1841                         if (n < 0)
1842                                 return true;
1843
1844                         info = &serverlist_cache[n].info;
1845                         info->game[0] = 0;
1846                         info->mod[0]  = 0;
1847                         info->map[0]  = 0;
1848                         info->name[0] = 0;
1849                         info->qcstatus[0] = 0;
1850                         info->players[0] = 0;
1851                         info->protocol = -1;
1852                         info->numplayers = 0;
1853                         info->numbots = -1;
1854                         info->maxplayers  = 0;
1855                         info->gameversion = 0;
1856
1857                         if ((s = SearchInfostring(string, "gamename"     )) != NULL) strlcpy(info->game, s, sizeof (info->game));
1858                         if ((s = SearchInfostring(string, "modname"      )) != NULL) strlcpy(info->mod , s, sizeof (info->mod ));
1859                         if ((s = SearchInfostring(string, "mapname"      )) != NULL) strlcpy(info->map , s, sizeof (info->map ));
1860                         if ((s = SearchInfostring(string, "hostname"     )) != NULL) strlcpy(info->name, s, sizeof (info->name));
1861                         if ((s = SearchInfostring(string, "protocol"     )) != NULL) info->protocol = atoi(s);
1862                         if ((s = SearchInfostring(string, "clients"      )) != NULL) info->numplayers = atoi(s);
1863                         if ((s = SearchInfostring(string, "bots"         )) != NULL) info->numbots = atoi(s);
1864                         if ((s = SearchInfostring(string, "sv_maxclients")) != NULL) info->maxplayers = atoi(s);
1865                         if ((s = SearchInfostring(string, "gameversion"  )) != NULL) info->gameversion = atoi(s);
1866                         if ((s = SearchInfostring(string, "qcstatus"     )) != NULL) strlcpy(info->qcstatus, s, sizeof(info->qcstatus));
1867                         info->numhumans = info->numplayers - max(0, info->numbots);
1868                         info->freeslots = info->maxplayers - info->numplayers;
1869
1870                         NetConn_ClientParsePacket_ServerList_UpdateCache(n);
1871
1872                         return true;
1873                 }
1874                 if (!strncmp(string, "getserversResponse\\", 19) && serverlist_cachecount < SERVERLIST_TOTALSIZE)
1875                 {
1876                         // Extract the IP addresses
1877                         data += 18;
1878                         length -= 18;
1879                         NetConn_ClientParsePacket_ServerList_ParseDPList(peeraddress, data, length, false);
1880                         return true;
1881                 }
1882                 if (!strncmp(string, "getserversExtResponse", 21) && serverlist_cachecount < SERVERLIST_TOTALSIZE)
1883                 {
1884                         // Extract the IP addresses
1885                         data += 21;
1886                         length -= 21;
1887                         NetConn_ClientParsePacket_ServerList_ParseDPList(peeraddress, data, length, true);
1888                         return true;
1889                 }
1890                 if (!memcmp(string, "d\n", 2) && serverlist_cachecount < SERVERLIST_TOTALSIZE)
1891                 {
1892                         // Extract the IP addresses
1893                         data += 2;
1894                         length -= 2;
1895                         masterreplycount++;
1896                         if (serverlist_consoleoutput)
1897                                 Con_Printf("received QuakeWorld server list from %s...\n", addressstring2);
1898                         while (length >= 6 && (data[0] != 0xFF || data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF) && data[4] * 256 + data[5] != 0)
1899                         {
1900                                 dpsnprintf (ipstring, sizeof (ipstring), "%u.%u.%u.%u:%u", data[0], data[1], data[2], data[3], data[4] * 256 + data[5]);
1901                                 if (serverlist_consoleoutput && developer_networking.integer)
1902                                         Con_Printf("Requesting info from QuakeWorld server %s\n", ipstring);
1903
1904                                 if( !NetConn_ClientParsePacket_ServerList_PrepareQuery( PROTOCOL_QUAKEWORLD, ipstring, false ) ) {
1905                                         break;
1906                                 }
1907
1908                                 // move on to next address in packet
1909                                 data += 6;
1910                                 length -= 6;
1911                         }
1912                         // begin or resume serverlist queries
1913                         serverlist_querysleep = false;
1914                         serverlist_querywaittime = realtime + 3;
1915                         return true;
1916                 }
1917                 if (!strncmp(string, "extResponse ", 12))
1918                 {
1919                         ++cl_net_extresponse_count;
1920                         if(cl_net_extresponse_count > NET_EXTRESPONSE_MAX)
1921                                 cl_net_extresponse_count = NET_EXTRESPONSE_MAX;
1922                         cl_net_extresponse_last = (cl_net_extresponse_last + 1) % NET_EXTRESPONSE_MAX;
1923                         dpsnprintf(cl_net_extresponse[cl_net_extresponse_last], sizeof(cl_net_extresponse[cl_net_extresponse_last]), "\"%s\" %s", addressstring2, string + 12);
1924                         return true;
1925                 }
1926                 if (!strncmp(string, "ping", 4))
1927                 {
1928                         if (developer_extra.integer)
1929                                 Con_DPrintf("Received ping from %s, sending ack\n", addressstring2);
1930                         NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
1931                         return true;
1932                 }
1933                 if (!strncmp(string, "ack", 3))
1934                         return true;
1935                 // QuakeWorld compatibility
1936                 if (length > 1 && string[0] == 'c' && (string[1] == '-' || (string[1] >= '0' && string[1] <= '9')) && cls.connect_trying)
1937                 {
1938                         // challenge message
1939                         Con_Printf("challenge %s received, sending QuakeWorld connect request back to %s\n", string + 1, addressstring2);
1940                         M_Update_Return_Reason("Got QuakeWorld challenge response");
1941                         cls.qw_qport = qport.integer;
1942                         // update the server IP in the userinfo (QW servers expect this, and it is used by the reconnect command)
1943                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ip", addressstring2);
1944                         NetConn_WriteString(mysocket, va("\377\377\377\377connect %i %i %i \"%s%s\"\n", 28, cls.qw_qport, atoi(string + 1), cls.userinfo, cls.connect_userinfo), peeraddress);
1945                         return true;
1946                 }
1947                 if (length >= 1 && string[0] == 'j' && cls.connect_trying)
1948                 {
1949                         // accept message
1950                         M_Update_Return_Reason("QuakeWorld Accepted");
1951                         NetConn_ConnectionEstablished(mysocket, peeraddress, PROTOCOL_QUAKEWORLD);
1952                         return true;
1953                 }
1954                 if (length > 2 && !memcmp(string, "n\\", 2))
1955                 {
1956                         serverlist_info_t *info;
1957                         int n;
1958
1959                         // qw server status
1960                         if (serverlist_consoleoutput && developer_networking.integer >= 2)
1961                                 Con_Printf("QW server status from server at %s:\n%s\n", addressstring2, string + 1);
1962
1963                         string += 1;
1964                         // search the cache for this server and update it
1965                         n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2);
1966                         if (n < 0)
1967                                 return true;
1968
1969                         info = &serverlist_cache[n].info;
1970                         strlcpy(info->game, "QuakeWorld", sizeof(info->game));
1971                         if ((s = SearchInfostring(string, "*gamedir"     )) != NULL) strlcpy(info->mod , s, sizeof (info->mod ));else info->mod[0]  = 0;
1972                         if ((s = SearchInfostring(string, "map"          )) != NULL) strlcpy(info->map , s, sizeof (info->map ));else info->map[0]  = 0;
1973                         if ((s = SearchInfostring(string, "hostname"     )) != NULL) strlcpy(info->name, s, sizeof (info->name));else info->name[0] = 0;
1974                         info->protocol = 0;
1975                         info->numplayers = 0; // updated below
1976                         info->numhumans = 0; // updated below
1977                         if ((s = SearchInfostring(string, "maxclients"   )) != NULL) info->maxplayers = atoi(s);else info->maxplayers  = 0;
1978                         if ((s = SearchInfostring(string, "gameversion"  )) != NULL) info->gameversion = atoi(s);else info->gameversion = 0;
1979
1980                         // count active players on server
1981                         // (we could gather more info, but we're just after the number)
1982                         s = strchr(string, '\n');
1983                         if (s)
1984                         {
1985                                 s++;
1986                                 while (s < string + length)
1987                                 {
1988                                         for (;s < string + length && *s != '\n';s++)
1989                                                 ;
1990                                         if (s >= string + length)
1991                                                 break;
1992                                         info->numplayers++;
1993                                         info->numhumans++;
1994                                         s++;
1995                                 }
1996                         }
1997
1998                         NetConn_ClientParsePacket_ServerList_UpdateCache(n);
1999
2000                         return true;
2001                 }
2002                 if (string[0] == 'n')
2003                 {
2004                         // qw print command
2005                         Con_Printf("QW print command from server at %s:\n%s\n", addressstring2, string + 1);
2006                 }
2007                 // we may not have liked the packet, but it was a command packet, so
2008                 // we're done processing this packet now
2009                 return true;
2010         }
2011         // quakeworld ingame packet
2012         if (fromserver && cls.protocol == PROTOCOL_QUAKEWORLD && length >= 8 && (ret = NetConn_ReceivedMessage(cls.netcon, data, length, cls.protocol, net_messagetimeout.value)) == 2)
2013         {
2014                 ret = 0;
2015                 CL_ParseServerMessage();
2016                 return ret;
2017         }
2018         // netquake control packets, supported for compatibility only
2019         if (length >= 5 && (control = BuffBigLong(data)) && (control & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (control & NETFLAG_LENGTH_MASK) == length && !ENCRYPTION_REQUIRED)
2020         {
2021                 int n;
2022                 serverlist_info_t *info;
2023
2024                 data += 4;
2025                 length -= 4;
2026                 SZ_Clear(&net_message);
2027                 SZ_Write(&net_message, data, length);
2028                 MSG_BeginReading();
2029                 c = MSG_ReadByte();
2030                 switch (c)
2031                 {
2032                 case CCREP_ACCEPT:
2033                         if (developer_extra.integer)
2034                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREP_ACCEPT from %s.\n", addressstring2);
2035                         if (cls.connect_trying)
2036                         {
2037                                 lhnetaddress_t clientportaddress;
2038                                 clientportaddress = *peeraddress;
2039                                 LHNETADDRESS_SetPort(&clientportaddress, MSG_ReadLong());
2040                                 // update the server IP in the userinfo (QW servers expect this, and it is used by the reconnect command)
2041                                 InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ip", addressstring2);
2042                                 M_Update_Return_Reason("Accepted");
2043                                 NetConn_ConnectionEstablished(mysocket, &clientportaddress, PROTOCOL_QUAKE);
2044                         }
2045                         break;
2046                 case CCREP_REJECT:
2047                         if (developer_extra.integer)
2048                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREP_REJECT from %s.\n", addressstring2);
2049                         cls.connect_trying = false;
2050                         M_Update_Return_Reason((char *)MSG_ReadString());
2051                         break;
2052                 case CCREP_SERVER_INFO:
2053                         if (developer_extra.integer)
2054                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREP_SERVER_INFO from %s.\n", addressstring2);
2055                         // LordHavoc: because the quake server may report weird addresses
2056                         // we just ignore it and keep the real address
2057                         MSG_ReadString();
2058                         // search the cache for this server and update it
2059                         n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2);
2060                         if (n < 0)
2061                                 break;
2062
2063                         info = &serverlist_cache[n].info;
2064                         strlcpy(info->game, "Quake", sizeof(info->game));
2065                         strlcpy(info->mod , "", sizeof(info->mod)); // mod name is not specified
2066                         strlcpy(info->name, MSG_ReadString(), sizeof(info->name));
2067                         strlcpy(info->map , MSG_ReadString(), sizeof(info->map));
2068                         info->numplayers = MSG_ReadByte();
2069                         info->maxplayers = MSG_ReadByte();
2070                         info->protocol = MSG_ReadByte();
2071
2072                         NetConn_ClientParsePacket_ServerList_UpdateCache(n);
2073
2074                         break;
2075                 case CCREP_RCON: // RocketGuy: ProQuake rcon support
2076                         if (developer_extra.integer)
2077                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREP_RCON from %s.\n", addressstring2);
2078
2079                         Con_Printf("%s\n", MSG_ReadString());
2080                         break;
2081                 case CCREP_PLAYER_INFO:
2082                         // we got a CCREP_PLAYER_INFO??
2083                         //if (developer_extra.integer)
2084                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_PLAYER_INFO from %s.\n", addressstring2);
2085                         break;
2086                 case CCREP_RULE_INFO:
2087                         // we got a CCREP_RULE_INFO??
2088                         //if (developer_extra.integer)
2089                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_RULE_INFO from %s.\n", addressstring2);
2090                         break;
2091                 default:
2092                         break;
2093                 }
2094                 SZ_Clear(&net_message);
2095                 // we may not have liked the packet, but it was a valid control
2096                 // packet, so we're done processing this packet now
2097                 return true;
2098         }
2099         ret = 0;
2100         if (fromserver && length >= (int)NET_HEADERSIZE && (ret = NetConn_ReceivedMessage(cls.netcon, data, length, cls.protocol, net_messagetimeout.value)) == 2)
2101                 CL_ParseServerMessage();
2102         return ret;
2103 }
2104
2105 void NetConn_QueryQueueFrame(void)
2106 {
2107         int index;
2108         int queries;
2109         int maxqueries;
2110         double timeouttime;
2111         static double querycounter = 0;
2112
2113         if(!net_slist_pause.integer && serverlist_paused)
2114                 ServerList_RebuildViewList();
2115         serverlist_paused = net_slist_pause.integer != 0;
2116
2117         if (serverlist_querysleep)
2118                 return;
2119
2120         // apply a cool down time after master server replies,
2121         // to avoid messing up the ping times on the servers
2122         if (serverlist_querywaittime > realtime)
2123                 return;
2124
2125         // each time querycounter reaches 1.0 issue a query
2126         querycounter += cl.realframetime * net_slist_queriespersecond.value;
2127         maxqueries = (int)querycounter;
2128         maxqueries = bound(0, maxqueries, net_slist_queriesperframe.integer);
2129         querycounter -= maxqueries;
2130
2131         if( maxqueries == 0 ) {
2132                 return;
2133         }
2134
2135         //      scan serverlist and issue queries as needed
2136         serverlist_querysleep = true;
2137
2138         timeouttime     = realtime - net_slist_timeout.value;
2139         for( index = 0, queries = 0 ;   index   < serverlist_cachecount &&      queries < maxqueries    ; index++ )
2140         {
2141                 serverlist_entry_t *entry = &serverlist_cache[ index ];
2142                 if( entry->query != SQS_QUERYING && entry->query != SQS_REFRESHING )
2143                 {
2144                         continue;
2145                 }
2146
2147                 serverlist_querysleep   = false;
2148                 if( entry->querycounter !=      0 && entry->querytime > timeouttime     )
2149                 {
2150                         continue;
2151                 }
2152
2153                 if( entry->querycounter !=      (unsigned) net_slist_maxtries.integer )
2154                 {
2155                         lhnetaddress_t  address;
2156                         int socket;
2157
2158                         LHNETADDRESS_FromString(&address, entry->info.cname, 0);
2159                         if      (entry->protocol == PROTOCOL_QUAKEWORLD)
2160                         {
2161                                 for (socket     = 0; socket     < cl_numsockets ;       socket++)
2162                                         NetConn_WriteString(cl_sockets[socket], "\377\377\377\377status\n", &address);
2163                         }
2164                         else
2165                         {
2166                                 for (socket     = 0; socket     < cl_numsockets ;       socket++)
2167                                         NetConn_WriteString(cl_sockets[socket], "\377\377\377\377getstatus", &address);
2168                         }
2169
2170                         //      update the entry fields
2171                         entry->querytime = realtime;
2172                         entry->querycounter++;
2173
2174                         // if not in the slist menu we should print the server to console
2175                         if (serverlist_consoleoutput)
2176                                 Con_Printf("querying %25s (%i. try)\n", entry->info.cname, entry->querycounter);
2177
2178                         queries++;
2179                 }
2180                 else
2181                 {
2182                         // have we tried to refresh this server?
2183                         if( entry->query == SQS_REFRESHING ) {
2184                                 // yes, so update the reply count (since its not responding anymore)
2185                                 serverreplycount--;
2186                                 if(!serverlist_paused)
2187                                         ServerList_ViewList_Remove(entry);
2188                         }
2189                         entry->query = SQS_TIMEDOUT;
2190                 }
2191         }
2192 }
2193
2194 void NetConn_ClientFrame(void)
2195 {
2196         int i, length;
2197         lhnetaddress_t peeraddress;
2198         NetConn_UpdateSockets();
2199         if (cls.connect_trying && cls.connect_nextsendtime < realtime)
2200         {
2201                 if (cls.connect_remainingtries == 0)
2202                         M_Update_Return_Reason("Connect: Waiting 10 seconds for reply");
2203                 cls.connect_nextsendtime = realtime + 1;
2204                 cls.connect_remainingtries--;
2205                 if (cls.connect_remainingtries <= -10)
2206                 {
2207                         cls.connect_trying = false;
2208                         M_Update_Return_Reason("Connect: Failed");
2209                         return;
2210                 }
2211                 // try challenge first (newer DP server or QW)
2212                 NetConn_WriteString(cls.connect_mysocket, "\377\377\377\377getchallenge", &cls.connect_address);
2213                 // then try netquake as a fallback (old server, or netquake)
2214                 SZ_Clear(&net_message);
2215                 // save space for the header, filled in later
2216                 MSG_WriteLong(&net_message, 0);
2217                 MSG_WriteByte(&net_message, CCREQ_CONNECT);
2218                 MSG_WriteString(&net_message, "QUAKE");
2219                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
2220                 StoreBigLong(net_message.data, NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
2221                 NetConn_Write(cls.connect_mysocket, net_message.data, net_message.cursize, &cls.connect_address);
2222                 SZ_Clear(&net_message);
2223         }
2224         for (i = 0;i < cl_numsockets;i++)
2225         {
2226                 while (cl_sockets[i] && (length = NetConn_Read(cl_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
2227                 {
2228 //                      R_TimeReport("clientreadnetwork");
2229                         NetConn_ClientParsePacket(cl_sockets[i], readbuffer, length, &peeraddress);
2230 //                      R_TimeReport("clientparsepacket");
2231                 }
2232         }
2233         NetConn_QueryQueueFrame();
2234         if (cls.netcon && realtime > cls.netcon->timeout && !sv.active)
2235         {
2236                 Con_Print("Connection timed out\n");
2237                 CL_Disconnect();
2238                 Host_ShutdownServer ();
2239         }
2240 }
2241
2242 static void NetConn_BuildChallengeString(char *buffer, int bufferlength)
2243 {
2244         int i;
2245         char c;
2246         for (i = 0;i < bufferlength - 1;i++)
2247         {
2248                 do
2249                 {
2250                         c = rand () % (127 - 33) + 33;
2251                 } while (c == '\\' || c == ';' || c == '"' || c == '%' || c == '/');
2252                 buffer[i] = c;
2253         }
2254         buffer[i] = 0;
2255 }
2256
2257 /// (div0) build the full response only if possible; better a getinfo response than no response at all if getstatus won't fit
2258 static qboolean NetConn_BuildStatusResponse(const char* challenge, char* out_msg, size_t out_size, qboolean fullstatus)
2259 {
2260         char qcstatus[256];
2261         unsigned int nb_clients = 0, nb_bots = 0, i;
2262         int length;
2263         char teambuf[3];
2264         const char *crypto_idstring;
2265
2266         SV_VM_Begin();
2267
2268         // How many clients are there?
2269         for (i = 0;i < (unsigned int)svs.maxclients;i++)
2270         {
2271                 if (svs.clients[i].active)
2272                 {
2273                         nb_clients++;
2274                         if (!svs.clients[i].netconnection)
2275                                 nb_bots++;
2276                 }
2277         }
2278
2279         *qcstatus = 0;
2280         if(prog->globaloffsets.worldstatus >= 0)
2281         {
2282                 const char *str = PRVM_G_STRING(prog->globaloffsets.worldstatus);
2283                 if(str && *str)
2284                 {
2285                         char *p;
2286                         const char *q;
2287                         p = qcstatus;
2288                         for(q = str; *q && p - qcstatus < (ptrdiff_t)(sizeof(qcstatus)) - 1; ++q)
2289                                 if(*q != '\\' && *q != '\n')
2290                                         *p++ = *q;
2291                         *p = 0;
2292                 }
2293         }
2294
2295         /// \TODO: we should add more information for the full status string
2296         crypto_idstring = Crypto_GetInfoResponseDataString();
2297         length = dpsnprintf(out_msg, out_size,
2298                                                 "\377\377\377\377%s\x0A"
2299                                                 "\\gamename\\%s\\modname\\%s\\gameversion\\%d\\sv_maxclients\\%d"
2300                                                 "\\clients\\%d\\bots\\%d\\mapname\\%s\\hostname\\%s\\protocol\\%d"
2301                                                 "%s%s"
2302                                                 "%s%s"
2303                                                 "%s%s"
2304                                                 "%s",
2305                                                 fullstatus ? "statusResponse" : "infoResponse",
2306                                                 gamename, com_modname, gameversion.integer, svs.maxclients,
2307                                                 nb_clients, nb_bots, sv.worldbasename, hostname.string, NET_PROTOCOL_VERSION,
2308                                                 *qcstatus ? "\\qcstatus\\" : "", qcstatus,
2309                                                 challenge ? "\\challenge\\" : "", challenge ? challenge : "",
2310                                                 crypto_idstring ? "\\d0_blind_id\\" : "", crypto_idstring ? crypto_idstring : "",
2311                                                 fullstatus ? "\n" : "");
2312
2313         // Make sure it fits in the buffer
2314         if (length < 0)
2315                 goto bad;
2316
2317         if (fullstatus)
2318         {
2319                 char *ptr;
2320                 int left;
2321                 int savelength;
2322
2323                 savelength = length;
2324
2325                 ptr = out_msg + length;
2326                 left = (int)out_size - length;
2327
2328                 for (i = 0;i < (unsigned int)svs.maxclients;i++)
2329                 {
2330                         client_t *cl = &svs.clients[i];
2331                         if (cl->active)
2332                         {
2333                                 int nameind, cleanind, pingvalue;
2334                                 char curchar;
2335                                 char cleanname [sizeof(cl->name)];
2336
2337                                 // Remove all characters '"' and '\' in the player name
2338                                 nameind = 0;
2339                                 cleanind = 0;
2340                                 do
2341                                 {
2342                                         curchar = cl->name[nameind++];
2343                                         if (curchar != '"' && curchar != '\\')
2344                                         {
2345                                                 cleanname[cleanind++] = curchar;
2346                                                 if (cleanind == sizeof(cleanname) - 1)
2347                                                         break;
2348                                         }
2349                                 } while (curchar != '\0');
2350                                 cleanname[cleanind] = 0; // cleanind is always a valid index even at this point
2351
2352                                 pingvalue = (int)(cl->ping * 1000.0f);
2353                                 if(cl->netconnection)
2354                                         pingvalue = bound(1, pingvalue, 9999);
2355                                 else
2356                                         pingvalue = 0;
2357
2358                                 *qcstatus = 0;
2359                                 if(prog->fieldoffsets.clientstatus >= 0)
2360                                 {
2361                                         const char *str = PRVM_E_STRING(PRVM_EDICT_NUM(i + 1), prog->fieldoffsets.clientstatus);
2362                                         if(str && *str)
2363                                         {
2364                                                 char *p;
2365                                                 const char *q;
2366                                                 p = qcstatus;
2367                                                 for(q = str; *q && p != qcstatus + sizeof(qcstatus) - 1; ++q)
2368                                                         if(*q != '\\' && *q != '"' && !ISWHITESPACE(*q))
2369                                                                 *p++ = *q;
2370                                                 *p = 0;
2371                                         }
2372                                 }
2373
2374                                 if ((gamemode == GAME_NEXUIZ || gamemode == GAME_XONOTIC) && (teamplay.integer > 0))
2375                                 {
2376                                         if(cl->frags == -666) // spectator
2377                                                 strlcpy(teambuf, " 0", sizeof(teambuf));
2378                                         else if(cl->colors == 0x44) // red team
2379                                                 strlcpy(teambuf, " 1", sizeof(teambuf));
2380                                         else if(cl->colors == 0xDD) // blue team
2381                                                 strlcpy(teambuf, " 2", sizeof(teambuf));
2382                                         else if(cl->colors == 0xCC) // yellow team
2383                                                 strlcpy(teambuf, " 3", sizeof(teambuf));
2384                                         else if(cl->colors == 0x99) // pink team
2385                                                 strlcpy(teambuf, " 4", sizeof(teambuf));
2386                                         else
2387                                                 strlcpy(teambuf, " 0", sizeof(teambuf));
2388                                 }
2389                                 else
2390                                         *teambuf = 0;
2391
2392                                 // note: team number is inserted according to SoF2 protocol
2393                                 if(*qcstatus)
2394                                         length = dpsnprintf(ptr, left, "%s %d%s \"%s\"\n",
2395                                                                                 qcstatus,
2396                                                                                 pingvalue,
2397                                                                                 teambuf,
2398                                                                                 cleanname);
2399                                 else
2400                                         length = dpsnprintf(ptr, left, "%d %d%s \"%s\"\n",
2401                                                                                 cl->frags,
2402                                                                                 pingvalue,
2403                                                                                 teambuf,
2404                                                                                 cleanname);
2405
2406                                 if(length < 0)
2407                                 {
2408                                         // out of space?
2409                                         // turn it into an infoResponse!
2410                                         out_msg[savelength] = 0;
2411                                         memcpy(out_msg + 4, "infoResponse\x0A", 13);
2412                                         memmove(out_msg + 17, out_msg + 19, savelength - 19);
2413                                         break;
2414                                 }
2415                                 left -= length;
2416                                 ptr += length;
2417                         }
2418                 }
2419         }
2420
2421         SV_VM_End();
2422         return true;
2423
2424 bad:
2425         SV_VM_End();
2426         return false;
2427 }
2428
2429 static qboolean NetConn_PreventConnectFlood(lhnetaddress_t *peeraddress)
2430 {
2431         int floodslotnum, bestfloodslotnum;
2432         double bestfloodtime;
2433         lhnetaddress_t noportpeeraddress;
2434         // see if this is a connect flood
2435         noportpeeraddress = *peeraddress;
2436         LHNETADDRESS_SetPort(&noportpeeraddress, 0);
2437         bestfloodslotnum = 0;
2438         bestfloodtime = sv.connectfloodaddresses[bestfloodslotnum].lasttime;
2439         for (floodslotnum = 0;floodslotnum < MAX_CONNECTFLOODADDRESSES;floodslotnum++)
2440         {
2441                 if (bestfloodtime >= sv.connectfloodaddresses[floodslotnum].lasttime)
2442                 {
2443                         bestfloodtime = sv.connectfloodaddresses[floodslotnum].lasttime;
2444                         bestfloodslotnum = floodslotnum;
2445                 }
2446                 if (sv.connectfloodaddresses[floodslotnum].lasttime && LHNETADDRESS_Compare(&noportpeeraddress, &sv.connectfloodaddresses[floodslotnum].address) == 0)
2447                 {
2448                         // this address matches an ongoing flood address
2449                         if (realtime < sv.connectfloodaddresses[floodslotnum].lasttime + net_connectfloodblockingtimeout.value)
2450                         {
2451                                 // renew the ban on this address so it does not expire
2452                                 // until the flood has subsided
2453                                 sv.connectfloodaddresses[floodslotnum].lasttime = realtime;
2454                                 //Con_Printf("Flood detected!\n");
2455                                 return true;
2456                         }
2457                         // the flood appears to have subsided, so allow this
2458                         bestfloodslotnum = floodslotnum; // reuse the same slot
2459                         break;
2460                 }
2461         }
2462         // begin a new timeout on this address
2463         sv.connectfloodaddresses[bestfloodslotnum].address = noportpeeraddress;
2464         sv.connectfloodaddresses[bestfloodslotnum].lasttime = realtime;
2465         //Con_Printf("Flood detection initiated!\n");
2466         return false;
2467 }
2468
2469 void NetConn_ClearConnectFlood(lhnetaddress_t *peeraddress)
2470 {
2471         int floodslotnum;
2472         lhnetaddress_t noportpeeraddress;
2473         // see if this is a connect flood
2474         noportpeeraddress = *peeraddress;
2475         LHNETADDRESS_SetPort(&noportpeeraddress, 0);
2476         for (floodslotnum = 0;floodslotnum < MAX_CONNECTFLOODADDRESSES;floodslotnum++)
2477         {
2478                 if (sv.connectfloodaddresses[floodslotnum].lasttime && LHNETADDRESS_Compare(&noportpeeraddress, &sv.connectfloodaddresses[floodslotnum].address) == 0)
2479                 {
2480                         // this address matches an ongoing flood address
2481                         // remove the ban
2482                         sv.connectfloodaddresses[floodslotnum].address.addresstype = LHNETADDRESSTYPE_NONE;
2483                         sv.connectfloodaddresses[floodslotnum].lasttime = 0;
2484                         //Con_Printf("Flood cleared!\n");
2485                 }
2486         }
2487 }
2488
2489 typedef qboolean (*rcon_matchfunc_t) (lhnetaddress_t *peeraddress, const char *password, const char *hash, const char *s, int slen);
2490
2491 qboolean hmac_mdfour_time_matching(lhnetaddress_t *peeraddress, const char *password, const char *hash, const char *s, int slen)
2492 {
2493         char mdfourbuf[16];
2494         long t1, t2;
2495
2496         t1 = (long) time(NULL);
2497         t2 = strtol(s, NULL, 0);
2498         if(abs(t1 - t2) > rcon_secure_maxdiff.integer)
2499                 return false;
2500
2501         if(!HMAC_MDFOUR_16BYTES((unsigned char *) mdfourbuf, (unsigned char *) s, slen, (unsigned char *) password, strlen(password)))
2502                 return false;
2503
2504         return !memcmp(mdfourbuf, hash, 16);
2505 }
2506
2507 qboolean hmac_mdfour_challenge_matching(lhnetaddress_t *peeraddress, const char *password, const char *hash, const char *s, int slen)
2508 {
2509         char mdfourbuf[16];
2510         int i;
2511
2512         if(slen < (int)(sizeof(challenge[0].string)) - 1)
2513                 return false;
2514
2515         // validate the challenge
2516         for (i = 0;i < MAX_CHALLENGES;i++)
2517                 if(challenge[i].time > 0)
2518                         if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address) && !strncmp(challenge[i].string, s, sizeof(challenge[0].string) - 1))
2519                                 break;
2520         // if the challenge is not recognized, drop the packet
2521         if (i == MAX_CHALLENGES)
2522                 return false;
2523
2524         if(!HMAC_MDFOUR_16BYTES((unsigned char *) mdfourbuf, (unsigned char *) s, slen, (unsigned char *) password, strlen(password)))
2525                 return false;
2526
2527         if(memcmp(mdfourbuf, hash, 16))
2528                 return false;
2529
2530         // unmark challenge to prevent replay attacks
2531         challenge[i].time = 0;
2532
2533         return true;
2534 }
2535
2536 qboolean plaintext_matching(lhnetaddress_t *peeraddress, const char *password, const char *hash, const char *s, int slen)
2537 {
2538         return !strcmp(password, hash);
2539 }
2540
2541 /// returns a string describing the user level, or NULL for auth failure
2542 const char *RCon_Authenticate(lhnetaddress_t *peeraddress, const char *password, const char *s, const char *endpos, rcon_matchfunc_t comparator, const char *cs, int cslen)
2543 {
2544         const char *text, *userpass_start, *userpass_end, *userpass_startpass;
2545         static char buf[MAX_INPUTLINE];
2546         qboolean hasquotes;
2547         qboolean restricted = false;
2548         qboolean have_usernames = false;
2549
2550         userpass_start = rcon_password.string;
2551         while((userpass_end = strchr(userpass_start, ' ')))
2552         {
2553                 have_usernames = true;
2554                 strlcpy(buf, userpass_start, ((size_t)(userpass_end-userpass_start) >= sizeof(buf)) ? (int)(sizeof(buf)) : (int)(userpass_end-userpass_start+1));
2555                 if(buf[0])
2556                         if(comparator(peeraddress, buf, password, cs, cslen))
2557                                 goto allow;
2558                 userpass_start = userpass_end + 1;
2559         }
2560         if(userpass_start[0])
2561         {
2562                 userpass_end = userpass_start + strlen(userpass_start);
2563                 if(comparator(peeraddress, userpass_start, password, cs, cslen))
2564                         goto allow;
2565         }
2566
2567         restricted = true;
2568         have_usernames = false;
2569         userpass_start = rcon_restricted_password.string;
2570         while((userpass_end = strchr(userpass_start, ' ')))
2571         {
2572                 have_usernames = true;
2573                 strlcpy(buf, userpass_start, ((size_t)(userpass_end-userpass_start) >= sizeof(buf)) ? (int)(sizeof(buf)) : (int)(userpass_end-userpass_start+1));
2574                 if(buf[0])
2575                         if(comparator(peeraddress, buf, password, cs, cslen))
2576                                 goto check;
2577                 userpass_start = userpass_end + 1;
2578         }
2579         if(userpass_start[0])
2580         {
2581                 userpass_end = userpass_start + strlen(userpass_start);
2582                 if(comparator(peeraddress, userpass_start, password, cs, cslen))
2583                         goto check;
2584         }
2585
2586         return NULL; // DENIED
2587
2588 check:
2589         for(text = s; text != endpos; ++text)
2590                 if((signed char) *text > 0 && ((signed char) *text < (signed char) ' ' || *text == ';'))
2591                         return NULL; // block possible exploits against the parser/alias expansion
2592
2593         while(s != endpos)
2594         {
2595                 size_t l = strlen(s);
2596                 if(l)
2597                 {
2598                         hasquotes = (strchr(s, '"') != NULL);
2599                         // sorry, we can't allow these substrings in wildcard expressions,
2600                         // as they can mess with the argument counts
2601                         text = rcon_restricted_commands.string;
2602                         while(COM_ParseToken_Console(&text))
2603                         {
2604                                 // com_token now contains a pattern to check for...
2605                                 if(strchr(com_token, '*') || strchr(com_token, '?')) // wildcard expression, * can only match a SINGLE argument
2606                                 {
2607                                         if(!hasquotes)
2608                                                 if(matchpattern_with_separator(s, com_token, true, " ", true)) // note how we excluded tab, newline etc. above
2609                                                         goto match;
2610                                 }
2611                                 else if(strchr(com_token, ' ')) // multi-arg expression? must match in whole
2612                                 {
2613                                         if(!strcmp(com_token, s))
2614                                                 goto match;
2615                                 }
2616                                 else // single-arg expression? must match the beginning of the command
2617                                 {
2618                                         if(!strcmp(com_token, s))
2619                                                 goto match;
2620                                         if(!memcmp(va("%s ", com_token), s, strlen(com_token) + 1))
2621                                                 goto match;
2622                                 }
2623                         }
2624                         // if we got here, nothing matched!
2625                         return NULL;
2626                 }
2627 match:
2628                 s += l + 1;
2629         }
2630
2631 allow:
2632         userpass_startpass = strchr(userpass_start, ':');
2633         if(have_usernames && userpass_startpass && userpass_startpass < userpass_end)
2634                 return va("%srcon (username %.*s)", restricted ? "restricted " : "", (int)(userpass_startpass-userpass_start), userpass_start);
2635
2636         return va("%srcon", restricted ? "restricted " : "");
2637 }
2638
2639 void RCon_Execute(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress, const char *addressstring2, const char *userlevel, const char *s, const char *endpos)
2640 {
2641         if(userlevel)
2642         {
2643                 // looks like a legitimate rcon command with the correct password
2644                 const char *s_ptr = s;
2645                 Con_Printf("server received %s command from %s: ", userlevel, host_client ? host_client->name : addressstring2);
2646                 while(s_ptr != endpos)
2647                 {
2648                         size_t l = strlen(s_ptr);
2649                         if(l)
2650                                 Con_Printf(" %s;", s_ptr);
2651                         s_ptr += l + 1;
2652                 }
2653                 Con_Printf("\n");
2654
2655                 if (!host_client || !host_client->netconnection || LHNETADDRESS_GetAddressType(&host_client->netconnection->peeraddress) != LHNETADDRESSTYPE_LOOP)
2656                         Con_Rcon_Redirect_Init(mysocket, peeraddress);
2657                 while(s != endpos)
2658                 {
2659                         size_t l = strlen(s);
2660                         if(l)
2661                         {
2662                                 client_t *host_client_save = host_client;
2663                                 Cmd_ExecuteString(s, src_command);
2664                                 host_client = host_client_save;
2665                                 // in case it is a command that changes host_client (like restart)
2666                         }
2667                         s += l + 1;
2668                 }
2669                 Con_Rcon_Redirect_End();
2670         }
2671         else
2672         {
2673                 Con_Printf("server denied rcon access to %s\n", host_client ? host_client->name : addressstring2);
2674         }
2675 }
2676
2677 extern void SV_SendServerinfo (client_t *client);
2678 static int NetConn_ServerParsePacket(lhnetsocket_t *mysocket, unsigned char *data, int length, lhnetaddress_t *peeraddress)
2679 {
2680         int i, ret, clientnum, best;
2681         double besttime;
2682         client_t *client;
2683         char *s, *string, response[1400], addressstring2[128];
2684         static char stringbuf[16384];
2685         qboolean islocal = (LHNETADDRESS_GetAddressType(peeraddress) == LHNETADDRESSTYPE_LOOP);
2686         char senddata[NET_HEADERSIZE+NET_MAXMESSAGE+CRYPTO_HEADERSIZE];
2687         size_t sendlength, response_len;
2688
2689         if (!sv.active)
2690                 return false;
2691
2692         // convert the address to a string incase we need it
2693         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
2694
2695         // see if we can identify the sender as a local player
2696         // (this is necessary for rcon to send a reliable reply if the client is
2697         //  actually on the server, not sending remotely)
2698         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
2699                 if (host_client->netconnection && host_client->netconnection->mysocket == mysocket && !LHNETADDRESS_Compare(&host_client->netconnection->peeraddress, peeraddress))
2700                         break;
2701         if (i == svs.maxclients)
2702                 host_client = NULL;
2703
2704         if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
2705         {
2706                 // received a command string - strip off the packaging and put it
2707                 // into our string buffer with NULL termination
2708                 data += 4;
2709                 length -= 4;
2710                 length = min(length, (int)sizeof(stringbuf) - 1);
2711                 memcpy(stringbuf, data, length);
2712                 stringbuf[length] = 0;
2713                 string = stringbuf;
2714
2715                 if (developer_extra.integer)
2716                 {
2717                         Con_Printf("NetConn_ServerParsePacket: %s sent us a command:\n", addressstring2);
2718                         Com_HexDumpToConsole(data, length);
2719                 }
2720
2721                 sendlength = sizeof(senddata) - 4;
2722                 switch(Crypto_ServerParsePacket(string, length, senddata+4, &sendlength, peeraddress))
2723                 {
2724                         case CRYPTO_NOMATCH:
2725                                 // nothing to do
2726                                 break;
2727                         case CRYPTO_MATCH:
2728                                 if(sendlength)
2729                                 {
2730                                         memcpy(senddata, "\377\377\377\377", 4);
2731                                         NetConn_Write(mysocket, senddata, sendlength+4, peeraddress);
2732                                 }
2733                                 break;
2734                         case CRYPTO_DISCARD:
2735                                 if(sendlength)
2736                                 {
2737                                         memcpy(senddata, "\377\377\377\377", 4);
2738                                         NetConn_Write(mysocket, senddata, sendlength+4, peeraddress);
2739                                 }
2740                                 return true;
2741                                 break;
2742                         case CRYPTO_REPLACE:
2743                                 string = senddata+4;
2744                                 length = sendlength;
2745                                 break;
2746                 }
2747
2748                 if (length >= 12 && !memcmp(string, "getchallenge", 12) && (islocal || sv_public.integer > -3))
2749                 {
2750                         for (i = 0, best = 0, besttime = realtime;i < MAX_CHALLENGES;i++)
2751                         {
2752                                 if(challenge[i].time > 0)
2753                                         if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address))
2754                                                 break;
2755                                 if (besttime > challenge[i].time)
2756                                         besttime = challenge[best = i].time;
2757                         }
2758                         // if we did not find an exact match, choose the oldest and
2759                         // update address and string
2760                         if (i == MAX_CHALLENGES)
2761                         {
2762                                 i = best;
2763                                 challenge[i].address = *peeraddress;
2764                                 NetConn_BuildChallengeString(challenge[i].string, sizeof(challenge[i].string));
2765                         }
2766                         challenge[i].time = realtime;
2767                         // send the challenge
2768                         dpsnprintf(response, sizeof(response), "\377\377\377\377challenge %s", challenge[i].string);
2769                         response_len = strlen(response) + 1;
2770                         Crypto_ServerAppendToChallenge(string, length, response, &response_len, sizeof(response));
2771                         NetConn_Write(mysocket, response, response_len, peeraddress);
2772                         return true;
2773                 }
2774                 if (length > 8 && !memcmp(string, "connect\\", 8))
2775                 {
2776                         crypto_t *crypto = Crypto_ServerGetInstance(peeraddress);
2777                         string += 7;
2778                         length -= 7;
2779
2780                         if(crypto && crypto->authenticated)
2781                         {
2782                                 // no need to check challenge
2783                                 if(crypto_developer.integer)
2784                                 {
2785                                         Con_Printf("%s connection to %s is being established: client is %s@%.*s, I am %.*s@%.*s\n",
2786                                                         crypto->use_aes ? "Encrypted" : "Authenticated",
2787                                                         addressstring2,
2788                                                         crypto->client_idfp[0] ? crypto->client_idfp : "-",
2789                                                         crypto_keyfp_recommended_length, crypto->client_keyfp[0] ? crypto->client_keyfp : "-",
2790                                                         crypto_keyfp_recommended_length, crypto->server_idfp[0] ? crypto->server_idfp : "-",
2791                                                         crypto_keyfp_recommended_length, crypto->server_keyfp[0] ? crypto->server_keyfp : "-"
2792                                                   );
2793                                 }
2794                         }
2795                         else
2796                         {
2797                                 if ((s = SearchInfostring(string, "challenge")))
2798                                 {
2799                                         // validate the challenge
2800                                         for (i = 0;i < MAX_CHALLENGES;i++)
2801                                                 if(challenge[i].time > 0)
2802                                                         if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address) && !strcmp(challenge[i].string, s))
2803                                                                 break;
2804                                         // if the challenge is not recognized, drop the packet
2805                                         if (i == MAX_CHALLENGES)
2806                                                 return true;
2807                                 }
2808                         }
2809
2810                         if((s = SearchInfostring(string, "message")))
2811                                 Con_DPrintf("Connecting client %s sent us the message: %s\n", addressstring2, s);
2812
2813                         if(!(islocal || sv_public.integer > -2))
2814                         {
2815                                 if (developer_extra.integer)
2816                                         Con_Printf("Datagram_ParseConnectionless: sending \"reject %s\" to %s.\n", sv_public_rejectreason.string, addressstring2);
2817                                 NetConn_WriteString(mysocket, va("\377\377\377\377reject %s", sv_public_rejectreason.string), peeraddress);
2818                                 return true;
2819                         }
2820
2821                         // check engine protocol
2822                         if(!(s = SearchInfostring(string, "protocol")) || strcmp(s, "darkplaces 3"))
2823                         {
2824                                 if (developer_extra.integer)
2825                                         Con_Printf("Datagram_ParseConnectionless: sending \"reject Wrong game protocol.\" to %s.\n", addressstring2);
2826                                 NetConn_WriteString(mysocket, "\377\377\377\377reject Wrong game protocol.", peeraddress);
2827                                 return true;
2828                         }
2829
2830                         // see if this is a duplicate connection request or a disconnected
2831                         // client who is rejoining to the same client slot
2832                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
2833                         {
2834                                 if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
2835                                 {
2836                                         // this is a known client...
2837                                         if(crypto && crypto->authenticated)
2838                                         {
2839                                                 // reject if changing key!
2840                                                 if(client->netconnection->crypto.authenticated)
2841                                                 {
2842                                                         if(
2843                                                                         strcmp(client->netconnection->crypto.client_idfp, crypto->client_idfp)
2844                                                                         ||
2845                                                                         strcmp(client->netconnection->crypto.server_idfp, crypto->server_idfp)
2846                                                                         ||
2847                                                                         strcmp(client->netconnection->crypto.client_keyfp, crypto->client_keyfp)
2848                                                                         ||
2849                                                                         strcmp(client->netconnection->crypto.server_keyfp, crypto->server_keyfp)
2850                                                           )
2851                                                         {
2852                                                                 if (developer_extra.integer)
2853                                                                         Con_Printf("Datagram_ParseConnectionless: sending \"reject Attempt to change key of crypto.\" to %s.\n", addressstring2);
2854                                                                 NetConn_WriteString(mysocket, "\377\377\377\377reject Attempt to change key of crypto.", peeraddress);
2855                                                                 return true;
2856                                                         }
2857                                                 }
2858                                         }
2859                                         else
2860                                         {
2861                                                 // reject if downgrading!
2862                                                 if(client->netconnection->crypto.authenticated)
2863                                                 {
2864                                                         if (developer_extra.integer)
2865                                                                 Con_Printf("Datagram_ParseConnectionless: sending \"reject Attempt to downgrade crypto.\" to %s.\n", addressstring2);
2866                                                         NetConn_WriteString(mysocket, "\377\377\377\377reject Attempt to downgrade crypto.", peeraddress);
2867                                                         return true;
2868                                                 }
2869                                         }
2870                                         if (client->spawned)
2871                                         {
2872                                                 // client crashed and is coming back,
2873                                                 // keep their stuff intact
2874                                                 if (developer_extra.integer)
2875                                                         Con_Printf("Datagram_ParseConnectionless: sending \"accept\" to %s.\n", addressstring2);
2876                                                 NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
2877                                                 if(crypto && crypto->authenticated)
2878                                                         Crypto_ServerFinishInstance(&client->netconnection->crypto, crypto);
2879                                                 SV_VM_Begin();
2880                                                 SV_SendServerinfo(client);
2881                                                 SV_VM_End();
2882                                         }
2883                                         else
2884                                         {
2885                                                 // client is still trying to connect,
2886                                                 // so we send a duplicate reply
2887                                                 if (developer_extra.integer)
2888                                                         Con_Printf("Datagram_ParseConnectionless: sending duplicate accept to %s.\n", addressstring2);
2889                                                 if(crypto && crypto->authenticated)
2890                                                         Crypto_ServerFinishInstance(&client->netconnection->crypto, crypto);
2891                                                 NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
2892                                         }
2893                                         return true;
2894                                 }
2895                         }
2896
2897                         if (NetConn_PreventConnectFlood(peeraddress))
2898                                 return true;
2899
2900                         // find an empty client slot for this new client
2901                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
2902                         {
2903                                 netconn_t *conn;
2904                                 if (!client->active && (conn = NetConn_Open(mysocket, peeraddress)))
2905                                 {
2906                                         // allocated connection
2907                                         if (developer_extra.integer)
2908                                                 Con_Printf("Datagram_ParseConnectionless: sending \"accept\" to %s.\n", conn->address);
2909                                         NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
2910                                         // now set up the client
2911                                         if(crypto && crypto->authenticated)
2912                                                 Crypto_ServerFinishInstance(&conn->crypto, crypto);
2913                                         SV_VM_Begin();
2914                                         SV_ConnectClient(clientnum, conn);
2915                                         SV_VM_End();
2916                                         NetConn_Heartbeat(1);
2917                                         return true;
2918                                 }
2919                         }
2920
2921                         // no empty slots found - server is full
2922                         if (developer_extra.integer)
2923                                 Con_Printf("Datagram_ParseConnectionless: sending \"reject Server is full.\" to %s.\n", addressstring2);
2924                         NetConn_WriteString(mysocket, "\377\377\377\377reject Server is full.", peeraddress);
2925
2926                         return true;
2927                 }
2928                 if (length >= 7 && !memcmp(string, "getinfo", 7) && (islocal || sv_public.integer > -1))
2929                 {
2930                         const char *challenge = NULL;
2931
2932                         // If there was a challenge in the getinfo message
2933                         if (length > 8 && string[7] == ' ')
2934                                 challenge = string + 8;
2935
2936                         if (NetConn_BuildStatusResponse(challenge, response, sizeof(response), false))
2937                         {
2938                                 if (developer_extra.integer)
2939                                         Con_DPrintf("Sending reply to master %s - %s\n", addressstring2, response);
2940                                 NetConn_WriteString(mysocket, response, peeraddress);
2941                         }
2942                         return true;
2943                 }
2944                 if (length >= 9 && !memcmp(string, "getstatus", 9) && (islocal || sv_public.integer > -1))
2945                 {
2946                         const char *challenge = NULL;
2947
2948                         // If there was a challenge in the getinfo message
2949                         if (length > 10 && string[9] == ' ')
2950                                 challenge = string + 10;
2951
2952                         if (NetConn_BuildStatusResponse(challenge, response, sizeof(response), true))
2953                         {
2954                                 if (developer_extra.integer)
2955                                         Con_DPrintf("Sending reply to client %s - %s\n", addressstring2, response);
2956                                 NetConn_WriteString(mysocket, response, peeraddress);
2957                         }
2958                         return true;
2959                 }
2960                 if (length >= 37 && !memcmp(string, "srcon HMAC-MD4 TIME ", 20))
2961                 {
2962                         char *password = string + 20;
2963                         char *timeval = string + 37;
2964                         char *s = strchr(timeval, ' ');
2965                         char *endpos = string + length + 1; // one behind the NUL, so adding strlen+1 will eventually reach it
2966                         const char *userlevel;
2967
2968                         if(rcon_secure.integer > 1)
2969                                 return true;
2970
2971                         if(!s)
2972                                 return true; // invalid packet
2973                         ++s;
2974
2975                         userlevel = RCon_Authenticate(peeraddress, password, s, endpos, hmac_mdfour_time_matching, timeval, endpos - timeval - 1); // not including the appended \0 into the HMAC
2976                         RCon_Execute(mysocket, peeraddress, addressstring2, userlevel, s, endpos);
2977                         return true;
2978                 }
2979                 if (length >= 42 && !memcmp(string, "srcon HMAC-MD4 CHALLENGE ", 25))
2980                 {
2981                         char *password = string + 25;
2982                         char *challenge = string + 42;
2983                         char *s = strchr(challenge, ' ');
2984                         char *endpos = string + length + 1; // one behind the NUL, so adding strlen+1 will eventually reach it
2985                         const char *userlevel;
2986                         if(!s)
2987                                 return true; // invalid packet
2988                         ++s;
2989
2990                         userlevel = RCon_Authenticate(peeraddress, password, s, endpos, hmac_mdfour_challenge_matching, challenge, endpos - challenge - 1); // not including the appended \0 into the HMAC
2991                         RCon_Execute(mysocket, peeraddress, addressstring2, userlevel, s, endpos);
2992                         return true;
2993                 }
2994                 if (length >= 5 && !memcmp(string, "rcon ", 5))
2995                 {
2996                         int i;
2997                         char *s = string + 5;
2998                         char *endpos = string + length + 1; // one behind the NUL, so adding strlen+1 will eventually reach it
2999                         char password[64];
3000
3001                         if(rcon_secure.integer > 0)
3002                                 return true;
3003
3004                         for (i = 0;!ISWHITESPACE(*s);s++)
3005                                 if (i < (int)sizeof(password) - 1)
3006                                         password[i++] = *s;
3007                         if(ISWHITESPACE(*s) && s != endpos) // skip leading ugly space
3008                                 ++s;
3009                         password[i] = 0;
3010                         if (!ISWHITESPACE(password[0]))
3011                         {
3012                                 const char *userlevel = RCon_Authenticate(peeraddress, password, s, endpos, plaintext_matching, NULL, 0);
3013                                 RCon_Execute(mysocket, peeraddress, addressstring2, userlevel, s, endpos);
3014                         }
3015                         return true;
3016                 }
3017                 if (!strncmp(string, "extResponse ", 12))
3018                 {
3019                         ++sv_net_extresponse_count;
3020                         if(sv_net_extresponse_count > NET_EXTRESPONSE_MAX)
3021                                 sv_net_extresponse_count = NET_EXTRESPONSE_MAX;
3022                         sv_net_extresponse_last = (sv_net_extresponse_last + 1) % NET_EXTRESPONSE_MAX;
3023                         dpsnprintf(sv_net_extresponse[sv_net_extresponse_last], sizeof(sv_net_extresponse[sv_net_extresponse_last]), "'%s' %s", addressstring2, string + 12);
3024                         return true;
3025                 }
3026                 if (!strncmp(string, "ping", 4))
3027                 {
3028                         if (developer_extra.integer)
3029                                 Con_DPrintf("Received ping from %s, sending ack\n", addressstring2);
3030                         NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
3031                         return true;
3032                 }
3033                 if (!strncmp(string, "ack", 3))
3034                         return true;
3035                 // we may not have liked the packet, but it was a command packet, so
3036                 // we're done processing this packet now
3037                 return true;
3038         }
3039         // netquake control packets, supported for compatibility only, and only
3040         // when running game protocols that are normally served via this connection
3041         // protocol
3042         // (this protects more modern protocols against being used for
3043         //  Quake packet flood Denial Of Service attacks)
3044         if (length >= 5 && (i = BuffBigLong(data)) && (i & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (i & NETFLAG_LENGTH_MASK) == length && (sv.protocol == PROTOCOL_QUAKE || sv.protocol == PROTOCOL_QUAKEDP || sv.protocol == PROTOCOL_NEHAHRAMOVIE || sv.protocol == PROTOCOL_NEHAHRABJP || sv.protocol == PROTOCOL_NEHAHRABJP2 || sv.protocol == PROTOCOL_NEHAHRABJP3 || sv.protocol == PROTOCOL_DARKPLACES1 || sv.protocol == PROTOCOL_DARKPLACES2 || sv.protocol == PROTOCOL_DARKPLACES3) && !ENCRYPTION_REQUIRED)
3045         {
3046                 int c;
3047                 int protocolnumber;
3048                 const char *protocolname;
3049                 data += 4;
3050                 length -= 4;
3051                 SZ_Clear(&net_message);
3052                 SZ_Write(&net_message, data, length);
3053                 MSG_BeginReading();
3054                 c = MSG_ReadByte();
3055                 switch (c)
3056                 {
3057                 case CCREQ_CONNECT:
3058                         if (developer_extra.integer)
3059                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREQ_CONNECT from %s.\n", addressstring2);
3060                         if(!(islocal || sv_public.integer > -2))
3061                         {
3062                                 if (developer_extra.integer)
3063                                         Con_DPrintf("Datagram_ParseConnectionless: sending CCREP_REJECT \"%s\" to %s.\n", sv_public_rejectreason.string, addressstring2);
3064                                 SZ_Clear(&net_message);
3065                                 // save space for the header, filled in later
3066                                 MSG_WriteLong(&net_message, 0);
3067                                 MSG_WriteByte(&net_message, CCREP_REJECT);
3068                                 MSG_WriteString(&net_message, va("%s\n", sv_public_rejectreason.string));
3069                                 StoreBigLong(net_message.data, NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
3070                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
3071                                 SZ_Clear(&net_message);
3072                                 break;
3073                         }
3074
3075                         protocolname = MSG_ReadString();
3076                         protocolnumber = MSG_ReadByte();
3077                         if (strcmp(protocolname, "QUAKE") || protocolnumber != NET_PROTOCOL_VERSION)
3078                         {
3079                                 if (developer_extra.integer)
3080                                         Con_DPrintf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Incompatible version.\" to %s.\n", addressstring2);
3081                                 SZ_Clear(&net_message);
3082                                 // save space for the header, filled in later
3083                                 MSG_WriteLong(&net_message, 0);
3084                                 MSG_WriteByte(&net_message, CCREP_REJECT);
3085                                 MSG_WriteString(&net_message, "Incompatible version.\n");
3086                                 StoreBigLong(net_message.data, NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
3087                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
3088                                 SZ_Clear(&net_message);
3089                                 break;
3090                         }
3091
3092                         // see if this connect request comes from a known client
3093                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
3094                         {
3095                                 if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
3096                                 {
3097                                         // this is either a duplicate connection request
3098                                         // or coming back from a timeout
3099                                         // (if so, keep their stuff intact)
3100
3101                                         // send a reply
3102                                         if (developer_extra.integer)
3103                                                 Con_DPrintf("Datagram_ParseConnectionless: sending duplicate CCREP_ACCEPT to %s.\n", addressstring2);
3104                                         SZ_Clear(&net_message);
3105                                         // save space for the header, filled in later
3106                                         MSG_WriteLong(&net_message, 0);
3107                                         MSG_WriteByte(&net_message, CCREP_ACCEPT);
3108                                         MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(client->netconnection->mysocket)));
3109                                         StoreBigLong(net_message.data, NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
3110                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
3111                                         SZ_Clear(&net_message);
3112
3113                                         // if client is already spawned, re-send the
3114                                         // serverinfo message as they'll need it to play
3115                                         if (client->spawned)
3116                                         {
3117                                                 SV_VM_Begin();
3118                                                 SV_SendServerinfo(client);
3119                                                 SV_VM_End();
3120                                         }
3121                                         return true;
3122                                 }
3123                         }
3124
3125                         // this is a new client, check for connection flood
3126                         if (NetConn_PreventConnectFlood(peeraddress))
3127                                 break;
3128
3129                         // find a slot for the new client
3130                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
3131                         {
3132                                 netconn_t *conn;
3133                                 if (!client->active && (client->netconnection = conn = NetConn_Open(mysocket, peeraddress)) != NULL)
3134                                 {
3135                                         // connect to the client
3136                                         // everything is allocated, just fill in the details
3137                                         strlcpy (conn->address, addressstring2, sizeof (conn->address));
3138                                         if (developer_extra.integer)
3139                                                 Con_DPrintf("Datagram_ParseConnectionless: sending CCREP_ACCEPT to %s.\n", addressstring2);
3140                                         // send back the info about the server connection
3141                                         SZ_Clear(&net_message);
3142                                         // save space for the header, filled in later
3143                                         MSG_WriteLong(&net_message, 0);
3144                                         MSG_WriteByte(&net_message, CCREP_ACCEPT);
3145                                         MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(conn->mysocket)));
3146                                         StoreBigLong(net_message.data, NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
3147                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
3148                                         SZ_Clear(&net_message);
3149                                         // now set up the client struct
3150                                         SV_VM_Begin();
3151                                         SV_ConnectClient(clientnum, conn);
3152                                         SV_VM_End();
3153                                         NetConn_Heartbeat(1);
3154                                         return true;
3155                                 }
3156                         }
3157
3158                         if (developer_extra.integer)
3159                                 Con_DPrintf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Server is full.\" to %s.\n", addressstring2);
3160                         // no room; try to let player know
3161                         SZ_Clear(&net_message);
3162                         // save space for the header, filled in later
3163                         MSG_WriteLong(&net_message, 0);
3164                         MSG_WriteByte(&net_message, CCREP_REJECT);
3165                         MSG_WriteString(&net_message, "Server is full.\n");
3166                         StoreBigLong(net_message.data, NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
3167                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
3168                         SZ_Clear(&net_message);
3169                         break;
3170                 case CCREQ_SERVER_INFO:
3171                         if (developer_extra.integer)
3172                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREQ_SERVER_INFO from %s.\n", addressstring2);
3173                         if(!(islocal || sv_public.integer > -1))
3174                                 break;
3175                         if (sv.active && !strcmp(MSG_ReadString(), "QUAKE"))
3176                         {
3177                                 int numclients;
3178                                 char myaddressstring[128];
3179                                 if (developer_extra.integer)
3180                                         Con_DPrintf("Datagram_ParseConnectionless: sending CCREP_SERVER_INFO to %s.\n", addressstring2);
3181                                 SZ_Clear(&net_message);
3182                                 // save space for the header, filled in later
3183                                 MSG_WriteLong(&net_message, 0);
3184                                 MSG_WriteByte(&net_message, CCREP_SERVER_INFO);
3185                                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), myaddressstring, sizeof(myaddressstring), true);
3186                                 MSG_WriteString(&net_message, myaddressstring);
3187                                 MSG_WriteString(&net_message, hostname.string);
3188                                 MSG_WriteString(&net_message, sv.name);
3189                                 // How many clients are there?
3190                                 for (i = 0, numclients = 0;i < svs.maxclients;i++)
3191                                         if (svs.clients[i].active)
3192                                                 numclients++;
3193                                 MSG_WriteByte(&net_message, numclients);
3194                                 MSG_WriteByte(&net_message, svs.maxclients);
3195                                 MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
3196                                 StoreBigLong(net_message.data, NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
3197                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
3198                                 SZ_Clear(&net_message);
3199                         }
3200                         break;
3201                 case CCREQ_PLAYER_INFO:
3202                         if (developer_extra.integer)
3203                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREQ_PLAYER_INFO from %s.\n", addressstring2);
3204                         if(!(islocal || sv_public.integer > -1))
3205                                 break;
3206                         if (sv.active)
3207                         {
3208                                 int playerNumber, activeNumber, clientNumber;
3209                                 client_t *client;
3210
3211                                 playerNumber = MSG_ReadByte();
3212                                 activeNumber = -1;
3213                                 for (clientNumber = 0, client = svs.clients; clientNumber < svs.maxclients; clientNumber++, client++)
3214                                         if (client->active && ++activeNumber == playerNumber)
3215                                                 break;
3216                                 if (clientNumber != svs.maxclients)
3217                                 {
3218                                         SZ_Clear(&net_message);
3219                                         // save space for the header, filled in later
3220                                         MSG_WriteLong(&net_message, 0);
3221                                         MSG_WriteByte(&net_message, CCREP_PLAYER_INFO);
3222                                         MSG_WriteByte(&net_message, playerNumber);
3223                                         MSG_WriteString(&net_message, client->name);
3224                                         MSG_WriteLong(&net_message, client->colors);
3225                                         MSG_WriteLong(&net_message, client->frags);
3226                                         MSG_WriteLong(&net_message, (int)(realtime - client->connecttime));
3227                                         MSG_WriteString(&net_message, client->netconnection ? client->netconnection->address : "botclient");
3228                                         StoreBigLong(net_message.data, NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
3229                                         NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
3230                                         SZ_Clear(&net_message);
3231                                 }
3232                         }
3233                         break;
3234                 case CCREQ_RULE_INFO:
3235                         if (developer_extra.integer)
3236                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREQ_RULE_INFO from %s.\n", addressstring2);
3237                         if(!(islocal || sv_public.integer > -1))
3238                                 break;
3239                         if (sv.active)
3240                         {
3241                                 char *prevCvarName;
3242                                 cvar_t *var;
3243
3244                                 // find the search start location
3245                                 prevCvarName = MSG_ReadString();
3246                                 var = Cvar_FindVarAfter(prevCvarName, CVAR_NOTIFY);
3247
3248                                 // send the response
3249                                 SZ_Clear(&net_message);
3250                                 // save space for the header, filled in later
3251                                 MSG_WriteLong(&net_message, 0);
3252                                 MSG_WriteByte(&net_message, CCREP_RULE_INFO);
3253                                 if (var)
3254                                 {
3255                                         MSG_WriteString(&net_message, var->name);
3256                                         MSG_WriteString(&net_message, var->string);
3257                                 }
3258                                 StoreBigLong(net_message.data, NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
3259                                 NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress);
3260                                 SZ_Clear(&net_message);
3261                         }
3262                         break;
3263                 default:
3264                         break;
3265                 }
3266                 SZ_Clear(&net_message);
3267                 // we may not have liked the packet, but it was a valid control
3268                 // packet, so we're done processing this packet now
3269                 return true;
3270         }
3271         if (host_client)
3272         {
3273                 if ((ret = NetConn_ReceivedMessage(host_client->netconnection, data, length, sv.protocol, host_client->spawned ? net_messagetimeout.value : net_connecttimeout.value)) == 2)
3274                 {
3275                         SV_VM_Begin();
3276                         SV_ReadClientMessage();
3277                         SV_VM_End();
3278                         return ret;
3279                 }
3280         }
3281         return 0;
3282 }
3283
3284 void NetConn_ServerFrame(void)
3285 {
3286         int i, length;
3287         lhnetaddress_t peeraddress;
3288         for (i = 0;i < sv_numsockets;i++)
3289                 while (sv_sockets[i] && (length = NetConn_Read(sv_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
3290                         NetConn_ServerParsePacket(sv_sockets[i], readbuffer, length, &peeraddress);
3291         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
3292         {
3293                 // never timeout loopback connections
3294                 if (host_client->netconnection && realtime > host_client->netconnection->timeout && LHNETADDRESS_GetAddressType(&host_client->netconnection->peeraddress) != LHNETADDRESSTYPE_LOOP)
3295                 {
3296                         Con_Printf("Client \"%s\" connection timed out\n", host_client->name);
3297                         SV_VM_Begin();
3298                         SV_DropClient(false);
3299                         SV_VM_End();
3300                 }
3301         }
3302 }
3303
3304 void NetConn_SleepMicroseconds(int microseconds)
3305 {
3306         LHNET_SleepUntilPacket_Microseconds(microseconds);
3307 }
3308
3309 void NetConn_QueryMasters(qboolean querydp, qboolean queryqw)
3310 {
3311         int i, j;
3312         int masternum;
3313         lhnetaddress_t masteraddress;
3314         lhnetaddress_t broadcastaddress;
3315         char request[256];
3316
3317         if (serverlist_cachecount >= SERVERLIST_TOTALSIZE)
3318                 return;
3319
3320         // 26000 is the default quake server port, servers on other ports will not
3321         // be found
3322         // note this is IPv4-only, I doubt there are IPv6-only LANs out there
3323         LHNETADDRESS_FromString(&broadcastaddress, "255.255.255.255", 26000);
3324
3325         if (querydp)
3326         {
3327                 for (i = 0;i < cl_numsockets;i++)
3328                 {
3329                         if (cl_sockets[i])
3330                         {
3331                                 const char *cmdname, *extraoptions;
3332                                 int af = LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i]));
3333
3334                                 if(LHNETADDRESS_GetAddressType(&broadcastaddress) == af)
3335                                 {
3336                                         // search LAN for Quake servers
3337                                         SZ_Clear(&net_message);
3338                                         // save space for the header, filled in later
3339                                         MSG_WriteLong(&net_message, 0);
3340                                         MSG_WriteByte(&net_message, CCREQ_SERVER_INFO);
3341                                         MSG_WriteString(&net_message, "QUAKE");
3342                                         MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION);
3343                                         StoreBigLong(net_message.data, NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK));
3344                                         NetConn_Write(cl_sockets[i], net_message.data, net_message.cursize, &broadcastaddress);
3345                                         SZ_Clear(&net_message);
3346
3347                                         // search LAN for DarkPlaces servers
3348                                         NetConn_WriteString(cl_sockets[i], "\377\377\377\377getstatus", &broadcastaddress);
3349                                 }
3350
3351                                 // build the getservers message to send to the dpmaster master servers
3352                                 if (LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])) == LHNETADDRESSTYPE_INET6)
3353                                 {
3354                                         cmdname = "getserversExt";
3355                                         extraoptions = " ipv4 ipv6";  // ask for IPv4 and IPv6 servers
3356                                 }
3357                                 else
3358                                 {
3359                                         cmdname = "getservers";
3360                                         extraoptions = "";
3361                                 }
3362                                 dpsnprintf(request, sizeof(request), "\377\377\377\377%s %s %u empty full%s", cmdname, gamename, NET_PROTOCOL_VERSION, extraoptions);
3363
3364                                 // search internet
3365                                 for (masternum = 0;sv_masters[masternum].name;masternum++)
3366                                 {
3367                                         if (sv_masters[masternum].string && sv_masters[masternum].string[0] && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, DPMASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == af)
3368                                         {
3369                                                 masterquerycount++;
3370                                                 NetConn_WriteString(cl_sockets[i], request, &masteraddress);
3371                                         }
3372                                 }
3373
3374                                 // search favorite servers
3375                                 for(j = 0; j < nFavorites; ++j)
3376                                 {
3377                                         if(LHNETADDRESS_GetAddressType(&favorites[j]) == af)
3378                                         {
3379                                                 if(LHNETADDRESS_ToString(&favorites[j], request, sizeof(request), true))
3380                                                         NetConn_ClientParsePacket_ServerList_PrepareQuery( PROTOCOL_DARKPLACES7, request, true );
3381                                         }
3382                                 }
3383                         }
3384                 }
3385         }
3386
3387         // only query QuakeWorld servers when the user wants to
3388         if (queryqw)
3389         {
3390                 for (i = 0;i < cl_numsockets;i++)
3391                 {
3392                         if (cl_sockets[i])
3393                         {
3394                                 int af = LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i]));
3395
3396                                 if(LHNETADDRESS_GetAddressType(&broadcastaddress) == af)
3397                                 {
3398                                         // search LAN for QuakeWorld servers
3399                                         NetConn_WriteString(cl_sockets[i], "\377\377\377\377status\n", &broadcastaddress);
3400
3401                                         // build the getservers message to send to the qwmaster master servers
3402                                         // note this has no -1 prefix, and the trailing nul byte is sent
3403                                         dpsnprintf(request, sizeof(request), "c\n");
3404                                 }
3405
3406                                 // search internet
3407                                 for (masternum = 0;sv_qwmasters[masternum].name;masternum++)
3408                                 {
3409                                         if (sv_qwmasters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_qwmasters[masternum].string, QWMASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])))
3410                                         {
3411                                                 if (m_state != m_slist)
3412                                                 {
3413                                                         char lookupstring[128];
3414                                                         LHNETADDRESS_ToString(&masteraddress, lookupstring, sizeof(lookupstring), true);
3415                                                         Con_Printf("Querying master %s (resolved from %s)\n", lookupstring, sv_qwmasters[masternum].string);
3416                                                 }
3417                                                 masterquerycount++;
3418                                                 NetConn_Write(cl_sockets[i], request, (int)strlen(request) + 1, &masteraddress);
3419                                         }
3420                                 }
3421
3422                                 // search favorite servers
3423                                 for(j = 0; j < nFavorites; ++j)
3424                                 {
3425                                         if(LHNETADDRESS_GetAddressType(&favorites[j]) == af)
3426                                         {
3427                                                 if(LHNETADDRESS_ToString(&favorites[j], request, sizeof(request), true))
3428                                                 {
3429                                                         NetConn_WriteString(cl_sockets[i], "\377\377\377\377status\n", &favorites[j]);
3430                                                         NetConn_ClientParsePacket_ServerList_PrepareQuery( PROTOCOL_QUAKEWORLD, request, true );
3431                                                 }
3432                                         }
3433                                 }
3434                         }
3435                 }
3436         }
3437         if (!masterquerycount)
3438         {
3439                 Con_Print("Unable to query master servers, no suitable network sockets active.\n");
3440                 M_Update_Return_Reason("No network");
3441         }
3442 }
3443
3444 void NetConn_Heartbeat(int priority)
3445 {
3446         lhnetaddress_t masteraddress;
3447         int masternum;
3448         lhnetsocket_t *mysocket;
3449
3450         // if it's a state change (client connected), limit next heartbeat to no
3451         // more than 30 sec in the future
3452         if (priority == 1 && nextheartbeattime > realtime + 30.0)
3453                 nextheartbeattime = realtime + 30.0;
3454
3455         // limit heartbeatperiod to 30 to 270 second range,
3456         // lower limit is to avoid abusing master servers with excess traffic,
3457         // upper limit is to avoid timing out on the master server (which uses
3458         // 300 sec timeout)
3459         if (sv_heartbeatperiod.value < 30)
3460                 Cvar_SetValueQuick(&sv_heartbeatperiod, 30);
3461         if (sv_heartbeatperiod.value > 270)
3462                 Cvar_SetValueQuick(&sv_heartbeatperiod, 270);
3463
3464         // make advertising optional and don't advertise singleplayer games, and
3465         // only send a heartbeat as often as the admin wants
3466         if (sv.active && sv_public.integer > 0 && svs.maxclients >= 2 && (priority > 1 || realtime > nextheartbeattime))
3467         {
3468                 nextheartbeattime = realtime + sv_heartbeatperiod.value;
3469                 for (masternum = 0;sv_masters[masternum].name;masternum++)
3470                         if (sv_masters[masternum].string && sv_masters[masternum].string[0] && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, DPMASTER_PORT) && (mysocket = NetConn_ChooseServerSocketForAddress(&masteraddress)))
3471                                 NetConn_WriteString(mysocket, "\377\377\377\377heartbeat DarkPlaces\x0A", &masteraddress);
3472         }
3473 }
3474
3475 static void Net_Heartbeat_f(void)
3476 {
3477         if (sv.active)
3478                 NetConn_Heartbeat(2);
3479         else
3480                 Con_Print("No server running, can not heartbeat to master server.\n");
3481 }
3482
3483 void PrintStats(netconn_t *conn)
3484 {
3485         if ((cls.state == ca_connected && cls.protocol == PROTOCOL_QUAKEWORLD) || (sv.active && sv.protocol == PROTOCOL_QUAKEWORLD))
3486                 Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, !conn->sendMessageLength, conn->outgoing_unreliable_sequence, conn->qw.incoming_sequence);
3487         else
3488                 Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, !conn->sendMessageLength, conn->nq.sendSequence, conn->nq.receiveSequence);
3489 }
3490
3491 void Net_Stats_f(void)
3492 {
3493         netconn_t *conn;
3494         Con_Printf("unreliable messages sent   = %i\n", unreliableMessagesSent);
3495         Con_Printf("unreliable messages recv   = %i\n", unreliableMessagesReceived);
3496         Con_Printf("reliable messages sent     = %i\n", reliableMessagesSent);
3497         Con_Printf("reliable messages received = %i\n", reliableMessagesReceived);
3498         Con_Printf("packetsSent                = %i\n", packetsSent);
3499         Con_Printf("packetsReSent              = %i\n", packetsReSent);
3500         Con_Printf("packetsReceived            = %i\n", packetsReceived);
3501         Con_Printf("receivedDuplicateCount     = %i\n", receivedDuplicateCount);
3502         Con_Printf("droppedDatagrams           = %i\n", droppedDatagrams);
3503         Con_Print("connections                =\n");
3504         for (conn = netconn_list;conn;conn = conn->next)
3505                 PrintStats(conn);
3506 }
3507
3508 void Net_Refresh_f(void)
3509 {
3510         if (m_state != m_slist) {
3511                 Con_Print("Sending new requests to master servers\n");
3512                 ServerList_QueryList(false, true, false, true);
3513                 Con_Print("Listening for replies...\n");
3514         } else
3515                 ServerList_QueryList(false, true, false, false);
3516 }
3517
3518 void Net_Slist_f(void)
3519 {
3520         ServerList_ResetMasks();
3521         serverlist_sortbyfield = SLIF_PING;
3522         serverlist_sortflags = 0;
3523     if (m_state != m_slist) {
3524                 Con_Print("Sending requests to master servers\n");
3525                 ServerList_QueryList(true, true, false, true);
3526                 Con_Print("Listening for replies...\n");
3527         } else
3528                 ServerList_QueryList(true, true, false, false);
3529 }
3530
3531 void Net_SlistQW_f(void)
3532 {
3533         ServerList_ResetMasks();
3534         serverlist_sortbyfield = SLIF_PING;
3535         serverlist_sortflags = 0;
3536     if (m_state != m_slist) {
3537                 Con_Print("Sending requests to master servers\n");
3538                 ServerList_QueryList(true, false, true, true);
3539                 serverlist_consoleoutput = true;
3540                 Con_Print("Listening for replies...\n");
3541         } else
3542                 ServerList_QueryList(true, false, true, false);
3543 }
3544
3545 void NetConn_Init(void)
3546 {
3547         int i;
3548         lhnetaddress_t tempaddress;
3549         netconn_mempool = Mem_AllocPool("network connections", 0, NULL);
3550         Cmd_AddCommand("net_stats", Net_Stats_f, "print network statistics");
3551         Cmd_AddCommand("net_slist", Net_Slist_f, "query dp master servers and print all server information");
3552         Cmd_AddCommand("net_slistqw", Net_SlistQW_f, "query qw master servers and print all server information");
3553         Cmd_AddCommand("net_refresh", Net_Refresh_f, "query dp master servers and refresh all server information");
3554         Cmd_AddCommand("heartbeat", Net_Heartbeat_f, "send a heartbeat to the master server (updates your server information)");
3555         Cvar_RegisterVariable(&rcon_restricted_password);
3556         Cvar_RegisterVariable(&rcon_restricted_commands);
3557         Cvar_RegisterVariable(&rcon_secure_maxdiff);
3558         Cvar_RegisterVariable(&net_slist_queriespersecond);
3559         Cvar_RegisterVariable(&net_slist_queriesperframe);
3560         Cvar_RegisterVariable(&net_slist_timeout);
3561         Cvar_RegisterVariable(&net_slist_maxtries);
3562         Cvar_RegisterVariable(&net_slist_favorites);
3563         Cvar_RegisterVariable(&net_slist_pause);
3564         Cvar_RegisterVariable(&net_messagetimeout);
3565         Cvar_RegisterVariable(&net_connecttimeout);
3566         Cvar_RegisterVariable(&net_connectfloodblockingtimeout);
3567         Cvar_RegisterVariable(&cl_netlocalping);
3568         Cvar_RegisterVariable(&cl_netpacketloss_send);
3569         Cvar_RegisterVariable(&cl_netpacketloss_receive);
3570         Cvar_RegisterVariable(&hostname);
3571         Cvar_RegisterVariable(&developer_networking);
3572         Cvar_RegisterVariable(&cl_netport);
3573         Cvar_RegisterVariable(&sv_netport);
3574         Cvar_RegisterVariable(&net_address);
3575         Cvar_RegisterVariable(&net_address_ipv6);
3576         Cvar_RegisterVariable(&sv_public);
3577         Cvar_RegisterVariable(&sv_public_rejectreason);
3578         Cvar_RegisterVariable(&sv_heartbeatperiod);
3579         for (i = 0;sv_masters[i].name;i++)
3580                 Cvar_RegisterVariable(&sv_masters[i]);
3581         Cvar_RegisterVariable(&gameversion);
3582         Cvar_RegisterVariable(&gameversion_min);
3583         Cvar_RegisterVariable(&gameversion_max);
3584 // COMMANDLINEOPTION: Server: -ip <ipaddress> sets the ip address of this machine for purposes of networking (default 0.0.0.0 also known as INADDR_ANY), use only if you have multiple network adapters and need to choose one specifically.
3585         if ((i = COM_CheckParm("-ip")) && i + 1 < com_argc)
3586         {
3587                 if (LHNETADDRESS_FromString(&tempaddress, com_argv[i + 1], 0) == 1)
3588                 {
3589                         Con_Printf("-ip option used, setting net_address to \"%s\"\n", com_argv[i + 1]);
3590                         Cvar_SetQuick(&net_address, com_argv[i + 1]);
3591                 }
3592                 else
3593                         Con_Printf("-ip option used, but unable to parse the address \"%s\"\n", com_argv[i + 1]);
3594         }
3595 // COMMANDLINEOPTION: Server: -port <portnumber> sets the port to use for a server (default 26000, the same port as QUAKE itself), useful if you host multiple servers on your machine
3596         if (((i = COM_CheckParm("-port")) || (i = COM_CheckParm("-ipport")) || (i = COM_CheckParm("-udpport"))) && i + 1 < com_argc)
3597         {
3598                 i = atoi(com_argv[i + 1]);
3599                 if (i >= 0 && i < 65536)
3600                 {
3601                         Con_Printf("-port option used, setting port cvar to %i\n", i);
3602                         Cvar_SetValueQuick(&sv_netport, i);
3603                 }
3604                 else
3605                         Con_Printf("-port option used, but %i is not a valid port number\n", i);
3606         }
3607         cl_numsockets = 0;
3608         sv_numsockets = 0;
3609         net_message.data = net_message_buf;
3610         net_message.maxsize = sizeof(net_message_buf);
3611         net_message.cursize = 0;
3612         LHNET_Init();
3613 }
3614
3615 void NetConn_Shutdown(void)
3616 {
3617         NetConn_CloseClientPorts();
3618         NetConn_CloseServerPorts();
3619         LHNET_Shutdown();
3620 }
3621