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 "thread.h"
  25 #include "lhnet.h"
  26
  27 // for secure rcon authentication
  28 #include "hmac.h"
  29 #include "mdfour.h"
  30 #include <time.h>
  31
  32 #define QWMASTER_PORT 27000
  33 #define DPMASTER_PORT 27950
  34
  35 // note this defaults on for dedicated servers, off for listen servers
  36 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"};
  37 cvar_t sv_public_rejectreason = {0, "sv_public_rejectreason", "The server is closing.", "Rejection reason for connects when sv_public is -2"};
  38 static cvar_t sv_heartbeatperiod = {CVAR_SAVE, "sv_heartbeatperiod", "120", "how often to send heartbeat in seconds (only used if sv_public is 1)"};
  39 extern cvar_t sv_status_privacy;
  40
  41 static cvar_t sv_masters [] =
  42 {
  43         {CVAR_SAVE, "sv_master1", "", "user-chosen master server 1"},
  44         {CVAR_SAVE, "sv_master2", "", "user-chosen master server 2"},
  45         {CVAR_SAVE, "sv_master3", "", "user-chosen master server 3"},
  46         {CVAR_SAVE, "sv_master4", "", "user-chosen master server 4"},
  47         {0, "sv_masterextra1", "ghdigital.com", "ghdigital.com - default master server 1 (admin: LordHavoc)"}, // admin: LordHavoc
  48         {0, "sv_masterextra2", "dpmaster.deathmask.net", "dpmaster.deathmask.net - default master server 2 (admin: Willis)"}, // admin: Willis
  49         {0, "sv_masterextra3", "dpmaster.tchr.no", "dpmaster.tchr.no - default master server 3 (admin: tChr)"}, // admin: tChr
  50         {0, NULL, NULL, NULL}
  51 };
  52
  53 #ifdef CONFIG_MENU
  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", "qwmaster.fodquake.net:27000", "Global master server. (admin: unknown)"},
  64         {0, NULL, NULL, NULL}
  65 };
  66 #endif
  67
  68 static double nextheartbeattime = 0;
  69
  70 sizebuf_t cl_message;
  71 sizebuf_t sv_message;
  72 static unsigned char cl_message_buf[NET_MAXMESSAGE];
  73 static unsigned char sv_message_buf[NET_MAXMESSAGE];
  74 char cl_readstring[MAX_INPUTLINE];
  75 char sv_readstring[MAX_INPUTLINE];
  76
  77 cvar_t net_test = {0, "net_test", "0", "internal development use only, leave it alone (usually does nothing anyway)"};
  78 cvar_t net_usesizelimit = {0, "net_usesizelimit", "2", "use packet size limiting (0: never, 1: in non-CSQC mode, 2: always)"};
  79 cvar_t net_burstreserve = {0, "net_burstreserve", "0.3", "how much of the burst time to reserve for packet size spikes"};
  80 cvar_t net_messagetimeout = {0, "net_messagetimeout","300", "drops players who have not sent any packets for this many seconds"};
  81 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."};
  82 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). Note that this does not include retries from the same IP; these are handled earlier and let in."};
  83 cvar_t net_challengefloodblockingtimeout = {0, "net_challengefloodblockingtimeout", "0.5", "when a challenge packet is received, it will block all future challenge packets from that IP address for this many seconds (cuts down on challenge floods). DarkPlaces clients retry once per second, so this should be <= 1. Failure here may lead to connect attempts failing."};
  84 cvar_t net_getstatusfloodblockingtimeout = {0, "net_getstatusfloodblockingtimeout", "1", "when a getstatus packet is received, it will block all future getstatus packets from that IP address for this many seconds (cuts down on getstatus floods). DarkPlaces retries every 4 seconds, and qstat retries once per second, so this should be <= 1. Failure here may lead to server not showing up in the server list."};
  85 cvar_t net_sourceaddresscheck = {0, "net_sourceaddresscheck", "1", "compare the source IP address for replies (more secure, may break some bad multihoming setups"};
  86 cvar_t hostname = {CVAR_SAVE, "hostname", "UNNAMED", "server message to show in server browser"};
  87 cvar_t developer_networking = {0, "developer_networking", "0", "prints all received and sent packets (recommended only for debugging)"};
  88
  89 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)"};
  90 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)"};
  91 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)"};
  92 static cvar_t net_slist_queriespersecond = {0, "net_slist_queriespersecond", "20", "how many server information requests to send per second"};
  93 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)"};
  94 static cvar_t net_slist_timeout = {0, "net_slist_timeout", "4", "how long to listen for a server information response before giving up"};
  95 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"};
  96 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)"};
  97 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"};
  98 static cvar_t net_tos_dscp = {CVAR_SAVE, "net_tos_dscp", "32", "DiffServ Codepoint for network sockets (may need game restart to apply)"};
  99 static cvar_t gameversion = {0, "gameversion", "0", "version of game data (mod-specific) to be sent to querying clients"};
 100 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"};
 101 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"};
 102 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"};
 103 static cvar_t rcon_restricted_commands = {0, "rcon_restricted_commands", "", "allowed commands for rcon when the restricted mode password was used"};
 104 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)"};
 105 extern cvar_t rcon_secure;
 106 extern cvar_t rcon_secure_challengetimeout;
 107
 108 double masterquerytime = -1000;
 109 int masterquerycount = 0;
 110 int masterreplycount = 0;
 111 int serverquerycount = 0;
 112 int serverreplycount = 0;
 113
 114 challenge_t challenge[MAX_CHALLENGES];
 115
 116 #ifdef CONFIG_MENU
 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 #endif
 125
 126 static int cl_numsockets;
 127 static lhnetsocket_t *cl_sockets[16];
 128 static int sv_numsockets;
 129 static lhnetsocket_t *sv_sockets[16];
 130
 131 netconn_t *netconn_list = NULL;
 132 mempool_t *netconn_mempool = NULL;
 133 void *netconn_mutex = NULL;
 134
 135 cvar_t cl_netport = {0, "cl_port", "0", "forces client to use chosen port number if not 0"};
 136 cvar_t sv_netport = {0, "port", "26000", "server port for players to connect to"};
 137 cvar_t net_address = {0, "net_address", "", "network address to open ipv4 ports on (if empty, use default interfaces)"};
 138 cvar_t net_address_ipv6 = {0, "net_address_ipv6", "", "network address to open ipv6 ports on (if empty, use default interfaces)"};
 139
 140 char cl_net_extresponse[NET_EXTRESPONSE_MAX][1400];
 141 int cl_net_extresponse_count = 0;
 142 int cl_net_extresponse_last = 0;
 143
 144 char sv_net_extresponse[NET_EXTRESPONSE_MAX][1400];
 145 int sv_net_extresponse_count = 0;
 146 int sv_net_extresponse_last = 0;
 147
 148 #ifdef CONFIG_MENU
 149 // ServerList interface
 150 serverlist_mask_t serverlist_andmasks[SERVERLIST_ANDMASKCOUNT];
 151 serverlist_mask_t serverlist_ormasks[SERVERLIST_ORMASKCOUNT];
 152
 153 serverlist_infofield_t serverlist_sortbyfield;
 154 int serverlist_sortflags;
 155
 156 int serverlist_viewcount = 0;
 157 unsigned short serverlist_viewlist[SERVERLIST_VIEWLISTSIZE];
 158
 159 int serverlist_maxcachecount = 0;
 160 int serverlist_cachecount = 0;
 161 serverlist_entry_t *serverlist_cache = NULL;
 162
 163 qboolean serverlist_consoleoutput;
 164
 165 static int nFavorites = 0;
 166 static lhnetaddress_t favorites[MAX_FAVORITESERVERS];
 167 static int nFavorites_idfp = 0;
 168 static char favorites_idfp[MAX_FAVORITESERVERS][FP64_SIZE+1];
 169
 170 void NetConn_UpdateFavorites(void)
 171 {
 172         const char *p;
 173         nFavorites = 0;
 174         nFavorites_idfp = 0;
 175         p = net_slist_favorites.string;
 176         while((size_t) nFavorites < sizeof(favorites) / sizeof(*favorites) && COM_ParseToken_Console(&p))
 177         {
 178                 if(com_token[0] != '[' && strlen(com_token) == FP64_SIZE && !strchr(com_token, '.'))
 179                 // currently 44 bytes, longest possible IPv6 address: 39 bytes, so this works
 180                 // (if v6 address contains port, it must start with '[')
 181                 {
 182                         strlcpy(favorites_idfp[nFavorites_idfp], com_token, sizeof(favorites_idfp[nFavorites_idfp]));
 183                         ++nFavorites_idfp;
 184                 }
 185                 else
 186                 {
 187                         if(LHNETADDRESS_FromString(&favorites[nFavorites], com_token, 26000))
 188                                 ++nFavorites;
 189                 }
 190         }
 191 }
 192
 193 /// helper function to insert a value into the viewset
 194 /// spare entries will be removed
 195 static void _ServerList_ViewList_Helper_InsertBefore( int index, serverlist_entry_t *entry )
 196 {
 197     int i;
 198         if( serverlist_viewcount < SERVERLIST_VIEWLISTSIZE ) {
 199                 i = serverlist_viewcount++;
 200         } else {
 201                 i = SERVERLIST_VIEWLISTSIZE - 1;
 202         }
 203
 204         for( ; i > index ; i-- )
 205                 serverlist_viewlist[ i ] = serverlist_viewlist[ i - 1 ];
 206
 207         serverlist_viewlist[index] = (int)(entry - serverlist_cache);
 208 }
 209
 210 /// we suppose serverlist_viewcount to be valid, ie > 0
 211 static void _ServerList_ViewList_Helper_Remove( int index )
 212 {
 213         serverlist_viewcount--;
 214         for( ; index < serverlist_viewcount ; index++ )
 215                 serverlist_viewlist[index] = serverlist_viewlist[index + 1];
 216 }
 217
 218 /// \returns true if A should be inserted before B
 219 static qboolean _ServerList_Entry_Compare( serverlist_entry_t *A, serverlist_entry_t *B )
 220 {
 221         int result = 0; // > 0 if for numbers A > B and for text if A < B
 222
 223         if( serverlist_sortflags & SLSF_CATEGORIES )
 224         {
 225                 result = A->info.category - B->info.category;
 226                 if (result != 0)
 227                         return result < 0;
 228         }
 229
 230         if( serverlist_sortflags & SLSF_FAVORITES )
 231         {
 232                 if(A->info.isfavorite != B->info.isfavorite)
 233                         return A->info.isfavorite;
 234         }
 235
 236         switch( serverlist_sortbyfield ) {
 237                 case SLIF_PING:
 238                         result = A->info.ping - B->info.ping;
 239                         break;
 240                 case SLIF_MAXPLAYERS:
 241                         result = A->info.maxplayers - B->info.maxplayers;
 242                         break;
 243                 case SLIF_NUMPLAYERS:
 244                         result = A->info.numplayers - B->info.numplayers;
 245                         break;
 246                 case SLIF_NUMBOTS:
 247                         result = A->info.numbots - B->info.numbots;
 248                         break;
 249                 case SLIF_NUMHUMANS:
 250                         result = A->info.numhumans - B->info.numhumans;
 251                         break;
 252                 case SLIF_FREESLOTS:
 253                         result = A->info.freeslots - B->info.freeslots;
 254                         break;
 255                 case SLIF_PROTOCOL:
 256                         result = A->info.protocol - B->info.protocol;
 257                         break;
 258                 case SLIF_CNAME:
 259                         result = strcmp( B->info.cname, A->info.cname );
 260                         break;
 261                 case SLIF_GAME:
 262                         result = strcasecmp( B->info.game, A->info.game );
 263                         break;
 264                 case SLIF_MAP:
 265                         result = strcasecmp( B->info.map, A->info.map );
 266                         break;
 267                 case SLIF_MOD:
 268                         result = strcasecmp( B->info.mod, A->info.mod );
 269                         break;
 270                 case SLIF_NAME:
 271                         result = strcasecmp( B->info.name, A->info.name );
 272                         break;
 273                 case SLIF_QCSTATUS:
 274                         result = strcasecmp( B->info.qcstatus, A->info.qcstatus ); // not really THAT useful, though
 275                         break;
 276                 case SLIF_CATEGORY:
 277                         result = A->info.category - B->info.category;
 278                         break;
 279                 case SLIF_ISFAVORITE:
 280                         result = !!B->info.isfavorite - !!A->info.isfavorite;
 281                         break;
 282                 default:
 283                         Con_DPrint( "_ServerList_Entry_Compare: Bad serverlist_sortbyfield!\n" );
 284                         break;
 285         }
 286
 287         if (result != 0)
 288         {
 289                 if( serverlist_sortflags & SLSF_DESCENDING )
 290                         return result > 0;
 291                 else
 292                         return result < 0;
 293         }
 294
 295         // if the chosen sort key is identical, sort by index
 296         // (makes this a stable sort, so that later replies from servers won't
 297         //  shuffle the servers around when they have the same ping)
 298         return A < B;
 299 }
 300
 301 static qboolean _ServerList_CompareInt( int A, serverlist_maskop_t op, int B )
 302 {
 303         // This should actually be done with some intermediate and end-of-function return
 304         switch( op ) {
 305                 case SLMO_LESS:
 306                         return A < B;
 307                 case SLMO_LESSEQUAL:
 308                         return A <= B;
 309                 case SLMO_EQUAL:
 310                         return A == B;
 311                 case SLMO_GREATER:
 312                         return A > B;
 313                 case SLMO_NOTEQUAL:
 314                         return A != B;
 315                 case SLMO_GREATEREQUAL:
 316                 case SLMO_CONTAINS:
 317                 case SLMO_NOTCONTAIN:
 318                 case SLMO_STARTSWITH:
 319                 case SLMO_NOTSTARTSWITH:
 320                         return A >= B;
 321                 default:
 322                         Con_DPrint( "_ServerList_CompareInt: Bad op!\n" );
 323                         return false;
 324         }
 325 }
 326
 327 static qboolean _ServerList_CompareStr( const char *A, serverlist_maskop_t op, const char *B )
 328 {
 329         int i;
 330         char bufferA[ 1400 ], bufferB[ 1400 ]; // should be more than enough
 331         COM_StringDecolorize(A, 0, bufferA, sizeof(bufferA), false);
 332         for (i = 0;i < (int)sizeof(bufferA)-1 && bufferA[i];i++)
 333                 bufferA[i] = (bufferA[i] >= 'A' && bufferA[i] <= 'Z') ? (bufferA[i] + 'a' - 'A') : bufferA[i];
 334         bufferA[i] = 0;
 335         for (i = 0;i < (int)sizeof(bufferB)-1 && B[i];i++)
 336                 bufferB[i] = (B[i] >= 'A' && B[i] <= 'Z') ? (B[i] + 'a' - 'A') : B[i];
 337         bufferB[i] = 0;
 338
 339         // Same here, also using an intermediate & final return would be more appropriate
 340         // A info B mask
 341         switch( op ) {
 342                 case SLMO_CONTAINS:
 343                         return *bufferB && !!strstr( bufferA, bufferB ); // we want a real bool
 344                 case SLMO_NOTCONTAIN:
 345                         return !*bufferB || !strstr( bufferA, bufferB );
 346                 case SLMO_STARTSWITH:
 347                         //Con_Printf("startsWith: %s %s\n", bufferA, bufferB);
 348                         return *bufferB && !memcmp(bufferA, bufferB, strlen(bufferB));
 349                 case SLMO_NOTSTARTSWITH:
 350                         return !*bufferB || memcmp(bufferA, bufferB, strlen(bufferB));
 351                 case SLMO_LESS:
 352                         return strcmp( bufferA, bufferB ) < 0;
 353                 case SLMO_LESSEQUAL:
 354                         return strcmp( bufferA, bufferB ) <= 0;
 355                 case SLMO_EQUAL:
 356                         return strcmp( bufferA, bufferB ) == 0;
 357                 case SLMO_GREATER:
 358                         return strcmp( bufferA, bufferB ) > 0;
 359                 case SLMO_NOTEQUAL:
 360                         return strcmp( bufferA, bufferB ) != 0;
 361                 case SLMO_GREATEREQUAL:
 362                         return strcmp( bufferA, bufferB ) >= 0;
 363                 default:
 364                         Con_DPrint( "_ServerList_CompareStr: Bad op!\n" );
 365                         return false;
 366         }
 367 }
 368
 369 static qboolean _ServerList_Entry_Mask( serverlist_mask_t *mask, serverlist_info_t *info )
 370 {
 371         if( !_ServerList_CompareInt( info->ping, mask->tests[SLIF_PING], mask->info.ping ) )
 372                 return false;
 373         if( !_ServerList_CompareInt( info->maxplayers, mask->tests[SLIF_MAXPLAYERS], mask->info.maxplayers ) )
 374                 return false;
 375         if( !_ServerList_CompareInt( info->numplayers, mask->tests[SLIF_NUMPLAYERS], mask->info.numplayers ) )
 376                 return false;
 377         if( !_ServerList_CompareInt( info->numbots, mask->tests[SLIF_NUMBOTS], mask->info.numbots ) )
 378                 return false;
 379         if( !_ServerList_CompareInt( info->numhumans, mask->tests[SLIF_NUMHUMANS], mask->info.numhumans ) )
 380                 return false;
 381         if( !_ServerList_CompareInt( info->freeslots, mask->tests[SLIF_FREESLOTS], mask->info.freeslots ) )
 382                 return false;
 383         if( !_ServerList_CompareInt( info->protocol, mask->tests[SLIF_PROTOCOL], mask->info.protocol ))
 384                 return false;
 385         if( *mask->info.cname
 386                 && !_ServerList_CompareStr( info->cname, mask->tests[SLIF_CNAME], mask->info.cname ) )
 387                 return false;
 388         if( *mask->info.game
 389                 && !_ServerList_CompareStr( info->game, mask->tests[SLIF_GAME], mask->info.game ) )
 390                 return false;
 391         if( *mask->info.mod
 392                 && !_ServerList_CompareStr( info->mod, mask->tests[SLIF_MOD], mask->info.mod ) )
 393                 return false;
 394         if( *mask->info.map
 395                 && !_ServerList_CompareStr( info->map, mask->tests[SLIF_MAP], mask->info.map ) )
 396                 return false;
 397         if( *mask->info.name
 398                 && !_ServerList_CompareStr( info->name, mask->tests[SLIF_NAME], mask->info.name ) )
 399                 return false;
 400         if( *mask->info.qcstatus
 401                 && !_ServerList_CompareStr( info->qcstatus, mask->tests[SLIF_QCSTATUS], mask->info.qcstatus ) )
 402                 return false;
 403         if( *mask->info.players
 404                 && !_ServerList_CompareStr( info->players, mask->tests[SLIF_PLAYERS], mask->info.players ) )
 405                 return false;
 406         if( !_ServerList_CompareInt( info->category, mask->tests[SLIF_CATEGORY], mask->info.category ) )
 407                 return false;
 408         if( !_ServerList_CompareInt( info->isfavorite, mask->tests[SLIF_ISFAVORITE], mask->info.isfavorite ))
 409                 return false;
 410         return true;
 411 }
 412
 413 static void ServerList_ViewList_Insert( serverlist_entry_t *entry )
 414 {
 415         int start, end, mid, i;
 416         lhnetaddress_t addr;
 417
 418         // reject incompatible servers
 419         if(
 420                 entry->info.gameversion != gameversion.integer
 421                 &&
 422                 !(
 423                            gameversion_min.integer >= 0 // min/max range set by user/mod?
 424                         && gameversion_max.integer >= 0
 425                         && gameversion_min.integer <= entry->info.gameversion // version of server in min/max range?
 426                         && gameversion_max.integer >= entry->info.gameversion
 427                  )
 428         )
 429                 return;
 430
 431         // refresh the "favorite" status
 432         entry->info.isfavorite = false;
 433         if(LHNETADDRESS_FromString(&addr, entry->info.cname, 26000))
 434         {
 435                 char idfp[FP64_SIZE+1];
 436                 for(i = 0; i < nFavorites; ++i)
 437                 {
 438                         if(LHNETADDRESS_Compare(&addr, &favorites[i]) == 0)
 439                         {
 440                                 entry->info.isfavorite = true;
 441                                 break;
 442                         }
 443                 }
 444                 if(Crypto_RetrieveHostKey(&addr, 0, NULL, 0, idfp, sizeof(idfp), NULL, NULL))
 445                 {
 446                         for(i = 0; i < nFavorites_idfp; ++i)
 447                         {
 448                                 if(!strcmp(idfp, favorites_idfp[i]))
 449                                 {
 450                                         entry->info.isfavorite = true;
 451                                         break;
 452                                 }
 453                         }
 454                 }
 455         }
 456
 457         // refresh the "category"
 458         entry->info.category = MR_GetServerListEntryCategory(entry);
 459
 460         // FIXME: change this to be more readable (...)
 461         // now check whether it passes through the masks
 462         for( start = 0 ; start < SERVERLIST_ANDMASKCOUNT && serverlist_andmasks[start].active; start++ )
 463                 if( !_ServerList_Entry_Mask( &serverlist_andmasks[start], &entry->info ) )
 464                         return;
 465
 466         for( start = 0 ; start < SERVERLIST_ORMASKCOUNT && serverlist_ormasks[start].active ; start++ )
 467                 if( _ServerList_Entry_Mask( &serverlist_ormasks[start], &entry->info ) )
 468                         break;
 469         if( start == SERVERLIST_ORMASKCOUNT || (start > 0 && !serverlist_ormasks[start].active) )
 470                 return;
 471
 472         if( !serverlist_viewcount ) {
 473                 _ServerList_ViewList_Helper_InsertBefore( 0, entry );
 474                 return;
 475         }
 476         // ok, insert it, we just need to find out where exactly:
 477
 478         // two special cases
 479         // check whether to insert it as new first item
 480         if( _ServerList_Entry_Compare( entry, ServerList_GetViewEntry(0) ) ) {
 481                 _ServerList_ViewList_Helper_InsertBefore( 0, entry );
 482                 return;
 483         } // check whether to insert it as new last item
 484         else if( !_ServerList_Entry_Compare( entry, ServerList_GetViewEntry(serverlist_viewcount - 1) ) ) {
 485                 _ServerList_ViewList_Helper_InsertBefore( serverlist_viewcount, entry );
 486                 return;
 487         }
 488         start = 0;
 489         end = serverlist_viewcount - 1;
 490         while( end > start + 1 )
 491         {
 492                 mid = (start + end) / 2;
 493                 // test the item that lies in the middle between start and end
 494                 if( _ServerList_Entry_Compare( entry, ServerList_GetViewEntry(mid) ) )
 495                         // the item has to be in the upper half
 496                         end = mid;
 497                 else
 498                         // the item has to be in the lower half
 499                         start = mid;
 500         }
 501         _ServerList_ViewList_Helper_InsertBefore( start + 1, entry );
 502 }
 503
 504 static void ServerList_ViewList_Remove( serverlist_entry_t *entry )
 505 {
 506         int i;
 507         for( i = 0; i < serverlist_viewcount; i++ )
 508         {
 509                 if (ServerList_GetViewEntry(i) == entry)
 510                 {
 511                         _ServerList_ViewList_Helper_Remove(i);
 512                         break;
 513                 }
 514         }
 515 }
 516
 517 void ServerList_RebuildViewList(void)
 518 {
 519         int i;
 520
 521         serverlist_viewcount = 0;
 522         for( i = 0 ; i < serverlist_cachecount ; i++ ) {
 523                 serverlist_entry_t *entry = &serverlist_cache[i];
 524                 // also display entries that are currently being refreshed [11/8/2007 Black]
 525                 if( entry->query == SQS_QUERIED || entry->query == SQS_REFRESHING )
 526                         ServerList_ViewList_Insert( entry );
 527         }
 528 }
 529
 530 void ServerList_ResetMasks(void)
 531 {
 532         int i;
 533
 534         memset( &serverlist_andmasks, 0, sizeof( serverlist_andmasks ) );
 535         memset( &serverlist_ormasks, 0, sizeof( serverlist_ormasks ) );
 536         // numbots needs to be compared to -1 to always succeed
 537         for(i = 0; i < SERVERLIST_ANDMASKCOUNT; ++i)
 538                 serverlist_andmasks[i].info.numbots = -1;
 539         for(i = 0; i < SERVERLIST_ORMASKCOUNT; ++i)
 540                 serverlist_ormasks[i].info.numbots = -1;
 541 }
 542
 543 void ServerList_GetPlayerStatistics(int *numplayerspointer, int *maxplayerspointer)
 544 {
 545         int i;
 546         int numplayers = 0, maxplayers = 0;
 547         for (i = 0;i < serverlist_cachecount;i++)
 548         {
 549                 if (serverlist_cache[i].query == SQS_QUERIED)
 550                 {
 551                         numplayers += serverlist_cache[i].info.numhumans;
 552                         maxplayers += serverlist_cache[i].info.maxplayers;
 553                 }
 554         }
 555         *numplayerspointer = numplayers;
 556         *maxplayerspointer = maxplayers;
 557 }
 558
 559 #if 0
 560 static void _ServerList_Test(void)
 561 {
 562         int i;
 563         if (serverlist_maxcachecount <= 1024)
 564         {
 565                 serverlist_maxcachecount = 1024;
 566                 serverlist_cache = (serverlist_entry_t *)Mem_Realloc(netconn_mempool, (void *)serverlist_cache, sizeof(serverlist_entry_t) * serverlist_maxcachecount);
 567         }
 568         for( i = 0 ; i < 1024 ; i++ ) {
 569                 memset( &serverlist_cache[serverlist_cachecount], 0, sizeof( serverlist_entry_t ) );
 570                 serverlist_cache[serverlist_cachecount].info.ping = 1000 + 1024 - i;
 571                 dpsnprintf( serverlist_cache[serverlist_cachecount].info.name, sizeof(serverlist_cache[serverlist_cachecount].info.name), "Black's ServerList Test %i", i );
 572                 serverlist_cache[serverlist_cachecount].finished = true;
 573                 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 );
 574                 ServerList_ViewList_Insert( &serverlist_cache[serverlist_cachecount] );
 575                 serverlist_cachecount++;
 576         }
 577 }
 578 #endif
 579
 580 void ServerList_QueryList(qboolean resetcache, qboolean querydp, qboolean queryqw, qboolean consoleoutput)
 581 {
 582         masterquerytime = realtime;
 583         masterquerycount = 0;
 584         masterreplycount = 0;
 585         if( resetcache ) {
 586                 serverquerycount = 0;
 587                 serverreplycount = 0;
 588                 serverlist_cachecount = 0;
 589                 serverlist_viewcount = 0;
 590                 serverlist_maxcachecount = 0;
 591                 serverlist_cache = (serverlist_entry_t *)Mem_Realloc(netconn_mempool, (void *)serverlist_cache, sizeof(serverlist_entry_t) * serverlist_maxcachecount);
 592         } else {
 593                 // refresh all entries
 594                 int n;
 595                 for( n = 0 ; n < serverlist_cachecount ; n++ ) {
 596                         serverlist_entry_t *entry = &serverlist_cache[ n ];
 597                         entry->query = SQS_REFRESHING;
 598                         entry->querycounter = 0;
 599                 }
 600         }
 601         serverlist_consoleoutput = consoleoutput;
 602
 603         //_ServerList_Test();
 604
 605         NetConn_QueryMasters(querydp, queryqw);
 606 }
 607 #endif
 608
 609 // rest
 610
 611 int NetConn_Read(lhnetsocket_t *mysocket, void *data, int maxlength, lhnetaddress_t *peeraddress)
 612 {
 613         int length;
 614         int i;
 615         if (mysocket->address.addresstype == LHNETADDRESSTYPE_LOOP && netconn_mutex)
 616                 Thread_LockMutex(netconn_mutex);
 617         length = LHNET_Read(mysocket, data, maxlength, peeraddress);
 618         if (mysocket->address.addresstype == LHNETADDRESSTYPE_LOOP && netconn_mutex)
 619                 Thread_UnlockMutex(netconn_mutex);
 620         if (length == 0)
 621                 return 0;
 622         if (cl_netpacketloss_receive.integer)
 623                 for (i = 0;i < cl_numsockets;i++)
 624                         if (cl_sockets[i] == mysocket && (rand() % 100) < cl_netpacketloss_receive.integer)
 625                                 return 0;
 626         if (developer_networking.integer)
 627         {
 628                 char addressstring[128], addressstring2[128];
 629                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
 630                 if (length > 0)
 631                 {
 632                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 633                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i from %s:\n", (void *)mysocket, addressstring, (void *)data, maxlength, (void *)peeraddress, length, addressstring2);
 634                         Com_HexDumpToConsole((unsigned char *)data, length);
 635                 }
 636                 else
 637                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i\n", (void *)mysocket, addressstring, (void *)data, maxlength, (void *)peeraddress, length);
 638         }
 639         return length;
 640 }
 641
 642 int NetConn_Write(lhnetsocket_t *mysocket, const void *data, int length, const lhnetaddress_t *peeraddress)
 643 {
 644         int ret;
 645         int i;
 646         if (cl_netpacketloss_send.integer)
 647                 for (i = 0;i < cl_numsockets;i++)
 648                         if (cl_sockets[i] == mysocket && (rand() % 100) < cl_netpacketloss_send.integer)
 649                                 return length;
 650         if (mysocket->address.addresstype == LHNETADDRESSTYPE_LOOP && netconn_mutex)
 651                 Thread_LockMutex(netconn_mutex);
 652         ret = LHNET_Write(mysocket, data, length, peeraddress);
 653         if (mysocket->address.addresstype == LHNETADDRESSTYPE_LOOP && netconn_mutex)
 654                 Thread_UnlockMutex(netconn_mutex);
 655         if (developer_networking.integer)
 656         {
 657                 char addressstring[128], addressstring2[128];
 658                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
 659                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 660                 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)");
 661                 Com_HexDumpToConsole((unsigned char *)data, length);
 662         }
 663         return ret;
 664 }
 665
 666 int NetConn_WriteString(lhnetsocket_t *mysocket, const char *string, const lhnetaddress_t *peeraddress)
 667 {
 668         // note this does not include the trailing NULL because we add that in the parser
 669         return NetConn_Write(mysocket, string, (int)strlen(string), peeraddress);
 670 }
 671
 672 qboolean NetConn_CanSend(netconn_t *conn)
 673 {
 674         conn->outgoing_packetcounter = (conn->outgoing_packetcounter + 1) % NETGRAPH_PACKETS;
 675         conn->outgoing_netgraph[conn->outgoing_packetcounter].time            = realtime;
 676         conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes = NETGRAPH_NOPACKET;
 677         conn->outgoing_netgraph[conn->outgoing_packetcounter].reliablebytes   = NETGRAPH_NOPACKET;
 678         conn->outgoing_netgraph[conn->outgoing_packetcounter].ackbytes        = NETGRAPH_NOPACKET;
 679         conn->outgoing_netgraph[conn->outgoing_packetcounter].cleartime       = conn->cleartime;
 680         if (realtime > conn->cleartime)
 681                 return true;
 682         else
 683         {
 684                 conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes = NETGRAPH_CHOKEDPACKET;
 685                 return false;
 686         }
 687 }
 688
 689 static void NetConn_UpdateCleartime(double *cleartime, int rate, int burstsize, int len)
 690 {
 691         double bursttime = burstsize / (double)rate;
 692
 693         // delay later packets to obey rate limit
 694         if (*cleartime < realtime - bursttime)
 695                 *cleartime = realtime - bursttime;
 696         *cleartime = *cleartime + len / (double)rate;
 697
 698         // limit bursts to one packet in size ("dialup mode" emulating old behaviour)
 699         if (net_test.integer)
 700         {
 701                 if (*cleartime < realtime)
 702                         *cleartime = realtime;
 703         }
 704 }
 705
 706 static int NetConn_AddCryptoFlag(crypto_t *crypto)
 707 {
 708         // HACK: if an encrypted connection is used, randomly set some unused
 709         // flags. When AES encryption is enabled, that will make resends differ
 710         // from the original, so that e.g. substring filters in a router/IPS
 711         // are unlikely to match a second time. See also "startkeylogger".
 712         int flag = 0;
 713         if (crypto->authenticated)
 714         {
 715                 // Let's always set at least one of the bits.
 716                 int r = rand() % 7 + 1;
 717                 if (r & 1)
 718                         flag |= NETFLAG_CRYPTO0;
 719                 if (r & 2)
 720                         flag |= NETFLAG_CRYPTO1;
 721                 if (r & 4)
 722                         flag |= NETFLAG_CRYPTO2;
 723         }
 724         return flag;
 725 }
 726
 727 int NetConn_SendUnreliableMessage(netconn_t *conn, sizebuf_t *data, protocolversion_t protocol, int rate, int burstsize, qboolean quakesignon_suppressreliables)
 728 {
 729         int totallen = 0;
 730         unsigned char sendbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
 731         unsigned char cryptosendbuffer[NET_HEADERSIZE+NET_MAXMESSAGE+CRYPTO_HEADERSIZE];
 732
 733         // if this packet was supposedly choked, but we find ourselves sending one
 734         // anyway, make sure the size counting starts at zero
 735         // (this mostly happens on level changes and disconnects and such)
 736         if (conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes == NETGRAPH_CHOKEDPACKET)
 737                 conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes = NETGRAPH_NOPACKET;
 738
 739         conn->outgoing_netgraph[conn->outgoing_packetcounter].cleartime = conn->cleartime;
 740
 741         if (protocol == PROTOCOL_QUAKEWORLD)
 742         {
 743                 int packetLen;
 744                 qboolean sendreliable;
 745
 746                 // note that it is ok to send empty messages to the qw server,
 747                 // otherwise it won't respond to us at all
 748
 749                 sendreliable = false;
 750                 // if the remote side dropped the last reliable message, resend it
 751                 if (conn->qw.incoming_acknowledged > conn->qw.last_reliable_sequence && conn->qw.incoming_reliable_acknowledged != conn->qw.reliable_sequence)
 752                         sendreliable = true;
 753                 // if the reliable transmit buffer is empty, copy the current message out
 754                 if (!conn->sendMessageLength && conn->message.cursize)
 755                 {
 756                         memcpy (conn->sendMessage, conn->message.data, conn->message.cursize);
 757                         conn->sendMessageLength = conn->message.cursize;
 758                         SZ_Clear(&conn->message); // clear the message buffer
 759                         conn->qw.reliable_sequence ^= 1;
 760                         sendreliable = true;
 761                 }
 762                 // outgoing unreliable packet number, and outgoing reliable packet number (0 or 1)
 763                 StoreLittleLong(sendbuffer, conn->outgoing_unreliable_sequence | (((unsigned int)sendreliable)<<31));
 764                 // last received unreliable packet number, and last received reliable packet number (0 or 1)
 765                 StoreLittleLong(sendbuffer + 4, conn->qw.incoming_sequence | (((unsigned int)conn->qw.incoming_reliable_sequence)<<31));
 766                 packetLen = 8;
 767                 conn->outgoing_unreliable_sequence++;
 768                 // client sends qport in every packet
 769                 if (conn == cls.netcon)
 770                 {
 771                         *((short *)(sendbuffer + 8)) = LittleShort(cls.qw_qport);
 772                         packetLen += 2;
 773                         // also update cls.qw_outgoing_sequence
 774                         cls.qw_outgoing_sequence = conn->outgoing_unreliable_sequence;
 775                 }
 776                 if (packetLen + (sendreliable ? conn->sendMessageLength : 0) > 1400)
 777                 {
 778                         Con_Printf ("NetConn_SendUnreliableMessage: reliable message too big %u\n", data->cursize);
 779                         return -1;
 780                 }
 781
 782                 conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes += packetLen + 28;
 783
 784                 // add the reliable message if there is one
 785                 if (sendreliable)
 786                 {
 787                         conn->outgoing_netgraph[conn->outgoing_packetcounter].reliablebytes += conn->sendMessageLength + 28;
 788                         memcpy(sendbuffer + packetLen, conn->sendMessage, conn->sendMessageLength);
 789                         packetLen += conn->sendMessageLength;
 790                         conn->qw.last_reliable_sequence = conn->outgoing_unreliable_sequence;
 791                 }
 792
 793                 // add the unreliable message if possible
 794                 if (packetLen + data->cursize <= 1400)
 795                 {
 796                         conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes += data->cursize + 28;
 797                         memcpy(sendbuffer + packetLen, data->data, data->cursize);
 798                         packetLen += data->cursize;
 799                 }
 800
 801                 NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress);
 802
 803                 conn->packetsSent++;
 804                 conn->unreliableMessagesSent++;
 805
 806                 totallen += packetLen + 28;
 807         }
 808         else
 809         {
 810                 unsigned int packetLen;
 811                 unsigned int dataLen;
 812                 unsigned int eom;
 813                 const void *sendme;
 814                 size_t sendmelen;
 815
 816                 // if a reliable message fragment has been lost, send it again
 817                 if (conn->sendMessageLength && (realtime - conn->lastSendTime) > 1.0)
 818                 {
 819                         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 820                         {
 821                                 dataLen = conn->sendMessageLength;
 822                                 eom = NETFLAG_EOM;
 823                         }
 824                         else
 825                         {
 826                                 dataLen = MAX_PACKETFRAGMENT;
 827                                 eom = 0;
 828                         }
 829
 830                         packetLen = NET_HEADERSIZE + dataLen;
 831
 832                         StoreBigLong(sendbuffer, packetLen | (NETFLAG_DATA | eom | NetConn_AddCryptoFlag(&conn->crypto)));
 833                         StoreBigLong(sendbuffer + 4, conn->nq.sendSequence - 1);
 834                         memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
 835
 836                         conn->outgoing_netgraph[conn->outgoing_packetcounter].reliablebytes += packetLen + 28;
 837
 838                         sendme = Crypto_EncryptPacket(&conn->crypto, &sendbuffer, packetLen, &cryptosendbuffer, &sendmelen, sizeof(cryptosendbuffer));
 839                         if (sendme && NetConn_Write(conn->mysocket, sendme, (int)sendmelen, &conn->peeraddress) == (int)sendmelen)
 840                         {
 841                                 conn->lastSendTime = realtime;
 842                                 conn->packetsReSent++;
 843                         }
 844
 845                         totallen += (int)sendmelen + 28;
 846                 }
 847
 848                 // if we have a new reliable message to send, do so
 849                 if (!conn->sendMessageLength && conn->message.cursize && !quakesignon_suppressreliables)
 850                 {
 851                         if (conn->message.cursize > (int)sizeof(conn->sendMessage))
 852                         {
 853                                 Con_Printf("NetConn_SendUnreliableMessage: reliable message too big (%u > %u)\n", conn->message.cursize, (int)sizeof(conn->sendMessage));
 854                                 conn->message.overflowed = true;
 855                                 return -1;
 856                         }
 857
 858                         if (developer_networking.integer && conn == cls.netcon)
 859                         {
 860                                 Con_Print("client sending reliable message to server:\n");
 861                                 SZ_HexDumpToConsole(&conn->message);
 862                         }
 863
 864                         memcpy(conn->sendMessage, conn->message.data, conn->message.cursize);
 865                         conn->sendMessageLength = conn->message.cursize;
 866                         SZ_Clear(&conn->message);
 867
 868                         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 869                         {
 870                                 dataLen = conn->sendMessageLength;
 871                                 eom = NETFLAG_EOM;
 872                         }
 873                         else
 874                         {
 875                                 dataLen = MAX_PACKETFRAGMENT;
 876                                 eom = 0;
 877                         }
 878
 879                         packetLen = NET_HEADERSIZE + dataLen;
 880
 881                         StoreBigLong(sendbuffer, packetLen | (NETFLAG_DATA | eom | NetConn_AddCryptoFlag(&conn->crypto)));
 882                         StoreBigLong(sendbuffer + 4, conn->nq.sendSequence);
 883                         memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
 884
 885                         conn->nq.sendSequence++;
 886
 887                         conn->outgoing_netgraph[conn->outgoing_packetcounter].reliablebytes += packetLen + 28;
 888
 889                         sendme = Crypto_EncryptPacket(&conn->crypto, &sendbuffer, packetLen, &cryptosendbuffer, &sendmelen, sizeof(cryptosendbuffer));
 890                         if(sendme)
 891                                 NetConn_Write(conn->mysocket, sendme, (int)sendmelen, &conn->peeraddress);
 892
 893                         conn->lastSendTime = realtime;
 894                         conn->packetsSent++;
 895                         conn->reliableMessagesSent++;
 896
 897                         totallen += (int)sendmelen + 28;
 898                 }
 899
 900                 // if we have an unreliable message to send, do so
 901                 if (data->cursize)
 902                 {
 903                         packetLen = NET_HEADERSIZE + data->cursize;
 904
 905                         if (packetLen > (int)sizeof(sendbuffer))
 906                         {
 907                                 Con_Printf("NetConn_SendUnreliableMessage: message too big %u\n", data->cursize);
 908                                 return -1;
 909                         }
 910
 911                         StoreBigLong(sendbuffer, packetLen | NETFLAG_UNRELIABLE | NetConn_AddCryptoFlag(&conn->crypto));
 912                         StoreBigLong(sendbuffer + 4, conn->outgoing_unreliable_sequence);
 913                         memcpy(sendbuffer + NET_HEADERSIZE, data->data, data->cursize);
 914
 915                         conn->outgoing_unreliable_sequence++;
 916
 917                         conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes += packetLen + 28;
 918
 919                         sendme = Crypto_EncryptPacket(&conn->crypto, &sendbuffer, packetLen, &cryptosendbuffer, &sendmelen, sizeof(cryptosendbuffer));
 920                         if(sendme)
 921                                 NetConn_Write(conn->mysocket, sendme, (int)sendmelen, &conn->peeraddress);
 922
 923                         conn->packetsSent++;
 924                         conn->unreliableMessagesSent++;
 925
 926                         totallen += (int)sendmelen + 28;
 927                 }
 928         }
 929
 930         NetConn_UpdateCleartime(&conn->cleartime, rate, burstsize, totallen);
 931
 932         return 0;
 933 }
 934
 935 qboolean NetConn_HaveClientPorts(void)
 936 {
 937         return !!cl_numsockets;
 938 }
 939
 940 qboolean NetConn_HaveServerPorts(void)
 941 {
 942         return !!sv_numsockets;
 943 }
 944
 945 void NetConn_CloseClientPorts(void)
 946 {
 947         for (;cl_numsockets > 0;cl_numsockets--)
 948                 if (cl_sockets[cl_numsockets - 1])
 949                         LHNET_CloseSocket(cl_sockets[cl_numsockets - 1]);
 950 }
 951
 952 static void NetConn_OpenClientPort(const char *addressstring, lhnetaddresstype_t addresstype, int defaultport)
 953 {
 954         lhnetaddress_t address;
 955         lhnetsocket_t *s;
 956         int success;
 957         char addressstring2[1024];
 958         if (addressstring && addressstring[0])
 959                 success = LHNETADDRESS_FromString(&address, addressstring, defaultport);
 960         else
 961                 success = LHNETADDRESS_FromPort(&address, addresstype, defaultport);
 962         if (success)
 963         {
 964                 if ((s = LHNET_OpenSocket_Connectionless(&address)))
 965                 {
 966                         cl_sockets[cl_numsockets++] = s;
 967                         LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
 968                         if (addresstype != LHNETADDRESSTYPE_LOOP)
 969                                 Con_Printf("Client opened a socket on address %s\n", addressstring2);
 970                 }
 971                 else
 972                 {
 973                         LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
 974                         Con_Printf("Client failed to open a socket on address %s\n", addressstring2);
 975                 }
 976         }
 977         else
 978                 Con_Printf("Client unable to parse address %s\n", addressstring);
 979 }
 980
 981 void NetConn_OpenClientPorts(void)
 982 {
 983         int port;
 984         NetConn_CloseClientPorts();
 985
 986         SV_LockThreadMutex(); // FIXME recursive?
 987         Crypto_LoadKeys(); // client sockets
 988         SV_UnlockThreadMutex();
 989
 990         port = bound(0, cl_netport.integer, 65535);
 991         if (cl_netport.integer != port)
 992                 Cvar_SetValueQuick(&cl_netport, port);
 993         if(port == 0)
 994                 Con_Printf("Client using an automatically assigned port\n");
 995         else
 996                 Con_Printf("Client using port %i\n", port);
 997         NetConn_OpenClientPort(NULL, LHNETADDRESSTYPE_LOOP, 2);
 998         NetConn_OpenClientPort(net_address.string, LHNETADDRESSTYPE_INET4, port);
 999 #ifndef NOSUPPORTIPV6
1000         NetConn_OpenClientPort(net_address_ipv6.string, LHNETADDRESSTYPE_INET6, port);
1001 #endif
1002 }
1003
1004 void NetConn_CloseServerPorts(void)
1005 {
1006         for (;sv_numsockets > 0;sv_numsockets--)
1007                 if (sv_sockets[sv_numsockets - 1])
1008                         LHNET_CloseSocket(sv_sockets[sv_numsockets - 1]);
1009 }
1010
1011 static qboolean NetConn_OpenServerPort(const char *addressstring, lhnetaddresstype_t addresstype, int defaultport, int range)
1012 {
1013         lhnetaddress_t address;
1014         lhnetsocket_t *s;
1015         int port;
1016         char addressstring2[1024];
1017         int success;
1018
1019         for (port = defaultport; port <= defaultport + range; port++)
1020         {
1021                 if (addressstring && addressstring[0])
1022                         success = LHNETADDRESS_FromString(&address, addressstring, port);
1023                 else
1024                         success = LHNETADDRESS_FromPort(&address, addresstype, port);
1025                 if (success)
1026                 {
1027                         if ((s = LHNET_OpenSocket_Connectionless(&address)))
1028                         {
1029                                 sv_sockets[sv_numsockets++] = s;
1030                                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
1031                                 if (addresstype != LHNETADDRESSTYPE_LOOP)
1032                                         Con_Printf("Server listening on address %s\n", addressstring2);
1033                                 return true;
1034                         }
1035                         else
1036                         {
1037                                 LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
1038                                 Con_Printf("Server failed to open socket on address %s\n", addressstring2);
1039                         }
1040                 }
1041                 else
1042                 {
1043                         Con_Printf("Server unable to parse address %s\n", addressstring);
1044                         // if it cant parse one address, it wont be able to parse another for sure
1045                         return false;
1046                 }
1047         }
1048         return false;
1049 }
1050
1051 void NetConn_OpenServerPorts(int opennetports)
1052 {
1053         int port;
1054         NetConn_CloseServerPorts();
1055
1056         SV_LockThreadMutex(); // FIXME recursive?
1057         Crypto_LoadKeys(); // server sockets
1058         SV_UnlockThreadMutex();
1059
1060         NetConn_UpdateSockets();
1061         port = bound(0, sv_netport.integer, 65535);
1062         if (port == 0)
1063                 port = 26000;
1064         Con_Printf("Server using port %i\n", port);
1065         if (sv_netport.integer != port)
1066                 Cvar_SetValueQuick(&sv_netport, port);
1067         if (cls.state != ca_dedicated)
1068                 NetConn_OpenServerPort(NULL, LHNETADDRESSTYPE_LOOP, 1, 1);
1069         if (opennetports)
1070         {
1071 #ifndef NOSUPPORTIPV6
1072                 qboolean ip4success = NetConn_OpenServerPort(net_address.string, LHNETADDRESSTYPE_INET4, port, 100);
1073                 NetConn_OpenServerPort(net_address_ipv6.string, LHNETADDRESSTYPE_INET6, port, ip4success ? 1 : 100);
1074 #else
1075                 NetConn_OpenServerPort(net_address.string, LHNETADDRESSTYPE_INET4, port, 100);
1076 #endif
1077         }
1078         if (sv_numsockets == 0)
1079                 Host_Error("NetConn_OpenServerPorts: unable to open any ports!");
1080 }
1081
1082 lhnetsocket_t *NetConn_ChooseClientSocketForAddress(lhnetaddress_t *address)
1083 {
1084         int i, a = LHNETADDRESS_GetAddressType(address);
1085         for (i = 0;i < cl_numsockets;i++)
1086                 if (cl_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])) == a)
1087                         return cl_sockets[i];
1088         return NULL;
1089 }
1090
1091 lhnetsocket_t *NetConn_ChooseServerSocketForAddress(lhnetaddress_t *address)
1092 {
1093         int i, a = LHNETADDRESS_GetAddressType(address);
1094         for (i = 0;i < sv_numsockets;i++)
1095                 if (sv_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(sv_sockets[i])) == a)
1096                         return sv_sockets[i];
1097         return NULL;
1098 }
1099
1100 netconn_t *NetConn_Open(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress)
1101 {
1102         netconn_t *conn;
1103         conn = (netconn_t *)Mem_Alloc(netconn_mempool, sizeof(*conn));
1104         conn->mysocket = mysocket;
1105         conn->peeraddress = *peeraddress;
1106         conn->lastMessageTime = realtime;
1107         conn->message.data = conn->messagedata;
1108         conn->message.maxsize = sizeof(conn->messagedata);
1109         conn->message.cursize = 0;
1110         // LordHavoc: (inspired by ProQuake) use a short connect timeout to
1111         // reduce effectiveness of connection request floods
1112         conn->timeout = realtime + net_connecttimeout.value;
1113         LHNETADDRESS_ToString(&conn->peeraddress, conn->address, sizeof(conn->address), true);
1114         conn->next = netconn_list;
1115         netconn_list = conn;
1116         return conn;
1117 }
1118
1119 void NetConn_ClearFlood(lhnetaddress_t *peeraddress, server_floodaddress_t *floodlist, size_t floodlength);
1120 void NetConn_Close(netconn_t *conn)
1121 {
1122         netconn_t *c;
1123         // remove connection from list
1124
1125         // allow the client to reconnect immediately
1126         NetConn_ClearFlood(&(conn->peeraddress), sv.connectfloodaddresses, sizeof(sv.connectfloodaddresses) / sizeof(sv.connectfloodaddresses[0]));
1127
1128         if (conn == netconn_list)
1129                 netconn_list = conn->next;
1130         else
1131         {
1132                 for (c = netconn_list;c;c = c->next)
1133                 {
1134                         if (c->next == conn)
1135                         {
1136                                 c->next = conn->next;
1137                                 break;
1138                         }
1139                 }
1140                 // not found in list, we'll avoid crashing here...
1141                 if (!c)
1142                         return;
1143         }
1144         // free connection
1145         Mem_Free(conn);
1146 }
1147
1148 static int clientport = -1;
1149 static int clientport2 = -1;
1150 static int hostport = -1;
1151 void NetConn_UpdateSockets(void)
1152 {
1153         int i, j;
1154
1155         // TODO add logic to automatically close sockets if needed
1156         LHNET_DefaultDSCP(net_tos_dscp.integer);
1157
1158         if (cls.state != ca_dedicated)
1159         {
1160                 if (clientport2 != cl_netport.integer)
1161                 {
1162                         clientport2 = cl_netport.integer;
1163                         if (cls.state == ca_connected)
1164                                 Con_Print("Changing \"cl_port\" will not take effect until you reconnect.\n");
1165                 }
1166                 if (cls.state == ca_disconnected && clientport != clientport2)
1167                 {
1168                         clientport = clientport2;
1169                         NetConn_CloseClientPorts();
1170                 }
1171                 if (cl_numsockets == 0)
1172                         NetConn_OpenClientPorts();
1173         }
1174
1175         if (hostport != sv_netport.integer)
1176         {
1177                 hostport = sv_netport.integer;
1178                 if (sv.active)
1179                         Con_Print("Changing \"port\" will not take effect until \"map\" command is executed.\n");
1180         }
1181
1182         for (j = 0;j < MAX_RCONS;j++)
1183         {
1184                 i = (cls.rcon_ringpos + j + 1) % MAX_RCONS;
1185                 if(cls.rcon_commands[i][0])
1186                 {
1187                         if(realtime > cls.rcon_timeout[i])
1188                         {
1189                                 char s[128];
1190                                 LHNETADDRESS_ToString(&cls.rcon_addresses[i], s, sizeof(s), true);
1191                                 Con_Printf("rcon to %s (for command %s) failed: challenge request timed out\n", s, cls.rcon_commands[i]);
1192                                 cls.rcon_commands[i][0] = 0;
1193                                 --cls.rcon_trying;
1194                                 break;
1195                         }
1196                 }
1197         }
1198 }
1199
1200 static int NetConn_ReceivedMessage(netconn_t *conn, const unsigned char *data, size_t length, protocolversion_t protocol, double newtimeout)
1201 {
1202         int originallength = (int)length;
1203         unsigned char sendbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
1204         unsigned char cryptosendbuffer[NET_HEADERSIZE+NET_MAXMESSAGE+CRYPTO_HEADERSIZE];
1205         unsigned char cryptoreadbuffer[NET_HEADERSIZE+NET_MAXMESSAGE+CRYPTO_HEADERSIZE];
1206         if (length < 8)
1207                 return 0;
1208
1209         if (protocol == PROTOCOL_QUAKEWORLD)
1210         {
1211                 unsigned int sequence, sequence_ack;
1212                 qboolean reliable_ack, reliable_message;
1213                 int count;
1214                 //int qport;
1215
1216                 sequence = LittleLong(*((int *)(data + 0)));
1217                 sequence_ack = LittleLong(*((int *)(data + 4)));
1218                 data += 8;
1219                 length -= 8;
1220
1221                 if (conn != cls.netcon)
1222                 {
1223                         // server only
1224                         if (length < 2)
1225                                 return 0;
1226                         // 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?)
1227                         //qport = LittleShort(*((int *)(data + 8)));
1228                         data += 2;
1229                         length -= 2;
1230                 }
1231
1232                 conn->packetsReceived++;
1233                 reliable_message = (sequence >> 31) != 0;
1234                 reliable_ack = (sequence_ack >> 31) != 0;
1235                 sequence &= ~(1<<31);
1236                 sequence_ack &= ~(1<<31);
1237                 if (sequence <= conn->qw.incoming_sequence)
1238                 {
1239                         //Con_DPrint("Got a stale datagram\n");
1240                         return 0;
1241                 }
1242                 count = sequence - (conn->qw.incoming_sequence + 1);
1243                 if (count > 0)
1244                 {
1245                         conn->droppedDatagrams += count;
1246                         //Con_DPrintf("Dropped %u datagram(s)\n", count);
1247                         // If too may packets have been dropped, only write the
1248                         // last NETGRAPH_PACKETS ones to the netgraph. Why?
1249                         // Because there's no point in writing more than
1250                         // these as the netgraph is going to be full anyway.
1251                         if (count > NETGRAPH_PACKETS)
1252                                 count = NETGRAPH_PACKETS;
1253                         while (count--)
1254                         {
1255                                 conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS;
1256                                 conn->incoming_netgraph[conn->incoming_packetcounter].time            = realtime;
1257                                 conn->incoming_netgraph[conn->incoming_packetcounter].cleartime       = conn->incoming_cleartime;
1258                                 conn->incoming_netgraph[conn->incoming_packetcounter].unreliablebytes = NETGRAPH_LOSTPACKET;
1259                                 conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes   = NETGRAPH_NOPACKET;
1260                                 conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes        = NETGRAPH_NOPACKET;
1261                         }
1262                 }
1263                 conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS;
1264                 conn->incoming_netgraph[conn->incoming_packetcounter].time            = realtime;
1265                 conn->incoming_netgraph[conn->incoming_packetcounter].cleartime       = conn->incoming_cleartime;
1266                 conn->incoming_netgraph[conn->incoming_packetcounter].unreliablebytes = originallength + 28;
1267                 conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes   = NETGRAPH_NOPACKET;
1268                 conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes        = NETGRAPH_NOPACKET;
1269                 NetConn_UpdateCleartime(&conn->incoming_cleartime, cl_rate.integer, cl_rate_burstsize.integer, originallength + 28);
1270
1271                 // limit bursts to one packet in size ("dialup mode" emulating old behaviour)
1272                 if (net_test.integer)
1273                 {
1274                         if (conn->cleartime < realtime)
1275                                 conn->cleartime = realtime;
1276                 }
1277
1278                 if (reliable_ack == conn->qw.reliable_sequence)
1279                 {
1280                         // received, now we will be able to send another reliable message
1281                         conn->sendMessageLength = 0;
1282                         conn->reliableMessagesReceived++;
1283                 }
1284                 conn->qw.incoming_sequence = sequence;
1285                 if (conn == cls.netcon)
1286                         cls.qw_incoming_sequence = conn->qw.incoming_sequence;
1287                 conn->qw.incoming_acknowledged = sequence_ack;
1288                 conn->qw.incoming_reliable_acknowledged = reliable_ack;
1289                 if (reliable_message)
1290                         conn->qw.incoming_reliable_sequence ^= 1;
1291                 conn->lastMessageTime = realtime;
1292                 conn->timeout = realtime + newtimeout;
1293                 conn->unreliableMessagesReceived++;
1294                 if (conn == cls.netcon)
1295                 {
1296                         SZ_Clear(&cl_message);
1297                         SZ_Write(&cl_message, data, (int)length);
1298                         MSG_BeginReading(&cl_message);
1299                 }
1300                 else
1301                 {
1302                         SZ_Clear(&sv_message);
1303                         SZ_Write(&sv_message, data, (int)length);
1304                         MSG_BeginReading(&sv_message);
1305                 }
1306                 return 2;
1307         }
1308         else
1309         {
1310                 unsigned int count;
1311                 unsigned int flags;
1312                 unsigned int sequence;
1313                 size_t qlength;
1314                 const void *sendme;
1315                 size_t sendmelen;
1316
1317                 originallength = (int)length;
1318                 data = (const unsigned char *) Crypto_DecryptPacket(&conn->crypto, data, length, cryptoreadbuffer, &length, sizeof(cryptoreadbuffer));
1319                 if(!data)
1320                         return 0;
1321                 if(length < 8)
1322                         return 0;
1323
1324                 qlength = (unsigned int)BuffBigLong(data);
1325                 flags = qlength & ~NETFLAG_LENGTH_MASK;
1326                 qlength &= NETFLAG_LENGTH_MASK;
1327                 // control packets were already handled
1328                 if (!(flags & NETFLAG_CTL) && qlength == length)
1329                 {
1330                         sequence = BuffBigLong(data + 4);
1331                         conn->packetsReceived++;
1332                         data += 8;
1333                         length -= 8;
1334                         if (flags & NETFLAG_UNRELIABLE)
1335                         {
1336                                 if (sequence >= conn->nq.unreliableReceiveSequence)
1337                                 {
1338                                         if (sequence > conn->nq.unreliableReceiveSequence)
1339                                         {
1340                                                 count = sequence - conn->nq.unreliableReceiveSequence;
1341                                                 conn->droppedDatagrams += count;
1342                                                 //Con_DPrintf("Dropped %u datagram(s)\n", count);
1343                                                 // If too may packets have been dropped, only write the
1344                                                 // last NETGRAPH_PACKETS ones to the netgraph. Why?
1345                                                 // Because there's no point in writing more than
1346                                                 // these as the netgraph is going to be full anyway.
1347                                                 if (count > NETGRAPH_PACKETS)
1348                                                         count = NETGRAPH_PACKETS;
1349                                                 while (count--)
1350                                                 {
1351                                                         conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS;
1352                                                         conn->incoming_netgraph[conn->incoming_packetcounter].time            = realtime;
1353                                                         conn->incoming_netgraph[conn->incoming_packetcounter].cleartime       = conn->incoming_cleartime;
1354                                                         conn->incoming_netgraph[conn->incoming_packetcounter].unreliablebytes = NETGRAPH_LOSTPACKET;
1355                                                         conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes   = NETGRAPH_NOPACKET;
1356                                                         conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes        = NETGRAPH_NOPACKET;
1357                                                 }
1358                                         }
1359                                         conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS;
1360                                         conn->incoming_netgraph[conn->incoming_packetcounter].time            = realtime;
1361                                         conn->incoming_netgraph[conn->incoming_packetcounter].cleartime       = conn->incoming_cleartime;
1362                                         conn->incoming_netgraph[conn->incoming_packetcounter].unreliablebytes = originallength + 28;
1363                                         conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes   = NETGRAPH_NOPACKET;
1364                                         conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes        = NETGRAPH_NOPACKET;
1365                                         NetConn_UpdateCleartime(&conn->incoming_cleartime, cl_rate.integer, cl_rate_burstsize.integer, originallength + 28);
1366
1367                                         conn->nq.unreliableReceiveSequence = sequence + 1;
1368                                         conn->lastMessageTime = realtime;
1369                                         conn->timeout = realtime + newtimeout;
1370                                         conn->unreliableMessagesReceived++;
1371                                         if (length > 0)
1372                                         {
1373                                                 if (conn == cls.netcon)
1374                                                 {
1375                                                         SZ_Clear(&cl_message);
1376                                                         SZ_Write(&cl_message, data, (int)length);
1377                                                         MSG_BeginReading(&cl_message);
1378                                                 }
1379                                                 else
1380                                                 {
1381                                                         SZ_Clear(&sv_message);
1382                                                         SZ_Write(&sv_message, data, (int)length);
1383                                                         MSG_BeginReading(&sv_message);
1384                                                 }
1385                                                 return 2;
1386                                         }
1387                                 }
1388                                 //else
1389                                 //      Con_DPrint("Got a stale datagram\n");
1390                                 return 1;
1391                         }
1392                         else if (flags & NETFLAG_ACK)
1393                         {
1394                                 conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes += originallength + 28;
1395                                 NetConn_UpdateCleartime(&conn->incoming_cleartime, cl_rate.integer, cl_rate_burstsize.integer, originallength + 28);
1396
1397                                 if (sequence == (conn->nq.sendSequence - 1))
1398                                 {
1399                                         if (sequence == conn->nq.ackSequence)
1400                                         {
1401                                                 conn->nq.ackSequence++;
1402                                                 if (conn->nq.ackSequence != conn->nq.sendSequence)
1403                                                         Con_DPrint("ack sequencing error\n");
1404                                                 conn->lastMessageTime = realtime;
1405                                                 conn->timeout = realtime + newtimeout;
1406                                                 if (conn->sendMessageLength > MAX_PACKETFRAGMENT)
1407                                                 {
1408                                                         unsigned int packetLen;
1409                                                         unsigned int dataLen;
1410                                                         unsigned int eom;
1411
1412                                                         conn->sendMessageLength -= MAX_PACKETFRAGMENT;
1413                                                         memmove(conn->sendMessage, conn->sendMessage+MAX_PACKETFRAGMENT, conn->sendMessageLength);
1414
1415                                                         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
1416                                                         {
1417                                                                 dataLen = conn->sendMessageLength;
1418                                                                 eom = NETFLAG_EOM;
1419                                                         }
1420                                                         else
1421                                                         {
1422                                                                 dataLen = MAX_PACKETFRAGMENT;
1423                                                                 eom = 0;
1424                                                         }
1425
1426                                                         packetLen = NET_HEADERSIZE + dataLen;
1427
1428                                                         StoreBigLong(sendbuffer, packetLen | (NETFLAG_DATA | eom | NetConn_AddCryptoFlag(&conn->crypto)));
1429                                                         StoreBigLong(sendbuffer + 4, conn->nq.sendSequence);
1430                                                         memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
1431
1432                                                         conn->nq.sendSequence++;
1433
1434                                                         sendme = Crypto_EncryptPacket(&conn->crypto, &sendbuffer, packetLen, &cryptosendbuffer, &sendmelen, sizeof(cryptosendbuffer));
1435                                                         if (sendme && NetConn_Write(conn->mysocket, sendme, (int)sendmelen, &conn->peeraddress) == (int)sendmelen)
1436                                                         {
1437                                                                 conn->lastSendTime = realtime;
1438                                                                 conn->packetsSent++;
1439                                                         }
1440                                                 }
1441                                                 else
1442                                                         conn->sendMessageLength = 0;
1443                                         }
1444                                         //else
1445                                         //      Con_DPrint("Duplicate ACK received\n");
1446                                 }
1447                                 //else
1448                                 //      Con_DPrint("Stale ACK received\n");
1449                                 return 1;
1450                         }
1451                         else if (flags & NETFLAG_DATA)
1452                         {
1453                                 unsigned char temppacket[8];
1454                                 conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes   += originallength + 28;
1455                                 NetConn_UpdateCleartime(&conn->incoming_cleartime, cl_rate.integer, cl_rate_burstsize.integer, originallength + 28);
1456
1457                                 conn->outgoing_netgraph[conn->outgoing_packetcounter].ackbytes        += 8 + 28;
1458
1459                                 StoreBigLong(temppacket, 8 | NETFLAG_ACK | NetConn_AddCryptoFlag(&conn->crypto));
1460                                 StoreBigLong(temppacket + 4, sequence);
1461                                 sendme = Crypto_EncryptPacket(&conn->crypto, temppacket, 8, &cryptosendbuffer, &sendmelen, sizeof(cryptosendbuffer));
1462                                 if(sendme)
1463                                         NetConn_Write(conn->mysocket, sendme, (int)sendmelen, &conn->peeraddress);
1464                                 if (sequence == conn->nq.receiveSequence)
1465                                 {
1466                                         conn->lastMessageTime = realtime;
1467                                         conn->timeout = realtime + newtimeout;
1468                                         conn->nq.receiveSequence++;
1469                                         if( conn->receiveMessageLength + length <= (int)sizeof( conn->receiveMessage ) ) {
1470                                                 memcpy(conn->receiveMessage + conn->receiveMessageLength, data, length);
1471                                                 conn->receiveMessageLength += (int)length;
1472                                         } else {
1473                                                 Con_Printf( "Reliable message (seq: %i) too big for message buffer!\n"
1474                                                                         "Dropping the message!\n", sequence );
1475                                                 conn->receiveMessageLength = 0;
1476                                                 return 1;
1477                                         }
1478                                         if (flags & NETFLAG_EOM)
1479                                         {
1480                                                 conn->reliableMessagesReceived++;
1481                                                 length = conn->receiveMessageLength;
1482                                                 conn->receiveMessageLength = 0;
1483                                                 if (length > 0)
1484                                                 {
1485                                                         if (conn == cls.netcon)
1486                                                         {
1487                                                                 SZ_Clear(&cl_message);
1488                                                                 SZ_Write(&cl_message, conn->receiveMessage, (int)length);
1489                                                                 MSG_BeginReading(&cl_message);
1490                                                         }
1491                                                         else
1492                                                         {
1493                                                                 SZ_Clear(&sv_message);
1494                                                                 SZ_Write(&sv_message, conn->receiveMessage, (int)length);
1495                                                                 MSG_BeginReading(&sv_message);
1496                                                         }
1497                                                         return 2;
1498                                                 }
1499                                         }
1500                                 }
1501                                 else
1502                                         conn->receivedDuplicateCount++;
1503                                 return 1;
1504                         }
1505                 }
1506         }
1507         return 0;
1508 }
1509
1510 static void NetConn_ConnectionEstablished(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress, protocolversion_t initialprotocol)
1511 {
1512         crypto_t *crypto;
1513         cls.connect_trying = false;
1514 #ifdef CONFIG_MENU
1515         M_Update_Return_Reason("");
1516 #endif
1517         // the connection request succeeded, stop current connection and set up a new connection
1518         CL_Disconnect();
1519         // if we're connecting to a remote server, shut down any local server
1520         if (LHNETADDRESS_GetAddressType(peeraddress) != LHNETADDRESSTYPE_LOOP && sv.active)
1521         {
1522                 SV_LockThreadMutex();
1523                 Host_ShutdownServer ();
1524                 SV_UnlockThreadMutex();
1525         }
1526         // allocate a net connection to keep track of things
1527         cls.netcon = NetConn_Open(mysocket, peeraddress);
1528         crypto = &cls.netcon->crypto;
1529         if(cls.crypto.authenticated)
1530         {
1531                 Crypto_FinishInstance(crypto, &cls.crypto);
1532                 Con_Printf("%s connection to %s has been established: server is %s@%s%.*s, I am %.*s@%s%.*s\n",
1533                                 crypto->use_aes ? "Encrypted" : "Authenticated",
1534                                 cls.netcon->address,
1535                                 crypto->server_idfp[0] ? crypto->server_idfp : "-",
1536                                 (crypto->server_issigned || !crypto->server_keyfp[0]) ? "" : "~",
1537                                 crypto_keyfp_recommended_length, crypto->server_keyfp[0] ? crypto->server_keyfp : "-",
1538                                 crypto_keyfp_recommended_length, crypto->client_idfp[0] ? crypto->client_idfp : "-",
1539                                 (crypto->client_issigned || !crypto->client_keyfp[0]) ? "" : "~",
1540                                 crypto_keyfp_recommended_length, crypto->client_keyfp[0] ? crypto->client_keyfp : "-"
1541                                 );
1542         }
1543         Con_Printf("Connection accepted to %s\n", cls.netcon->address);
1544         key_dest = key_game;
1545 #ifdef CONFIG_MENU
1546         m_state = m_none;
1547 #endif
1548         cls.demonum = -1;                       // not in the demo loop now
1549         cls.state = ca_connected;
1550         cls.signon = 0;                         // need all the signon messages before playing
1551         cls.protocol = initialprotocol;
1552         // reset move sequence numbering on this new connection
1553         cls.servermovesequence = 0;
1554         if (cls.protocol == PROTOCOL_QUAKEWORLD)
1555                 Cmd_ForwardStringToServer("new");
1556         if (cls.protocol == PROTOCOL_QUAKE)
1557         {
1558                 // write a keepalive (clc_nop) as it seems to greatly improve the
1559                 // chances of connecting to a netquake server
1560                 sizebuf_t msg;
1561                 unsigned char buf[4];
1562                 memset(&msg, 0, sizeof(msg));
1563                 msg.data = buf;
1564                 msg.maxsize = sizeof(buf);
1565                 MSG_WriteChar(&msg, clc_nop);
1566                 NetConn_SendUnreliableMessage(cls.netcon, &msg, cls.protocol, 10000, 0, false);
1567         }
1568 }
1569
1570 int NetConn_IsLocalGame(void)
1571 {
1572         if (cls.state == ca_connected && sv.active && cl.maxclients == 1)
1573                 return true;
1574         return false;
1575 }
1576
1577 #ifdef CONFIG_MENU
1578 static int NetConn_ClientParsePacket_ServerList_ProcessReply(const char *addressstring)
1579 {
1580         int n;
1581         int pingtime;
1582         serverlist_entry_t *entry = NULL;
1583
1584         // search the cache for this server and update it
1585         for (n = 0;n < serverlist_cachecount;n++) {
1586                 entry = &serverlist_cache[ n ];
1587                 if (!strcmp(addressstring, entry->info.cname))
1588                         break;
1589         }
1590
1591         if (n == serverlist_cachecount)
1592         {
1593                 // LAN search doesnt require an answer from the master server so we wont
1594                 // know the ping nor will it be initialized already...
1595
1596                 // find a slot
1597                 if (serverlist_cachecount == SERVERLIST_TOTALSIZE)
1598                         return -1;
1599
1600                 if (serverlist_maxcachecount <= serverlist_cachecount)
1601                 {
1602                         serverlist_maxcachecount += 64;
1603                         serverlist_cache = (serverlist_entry_t *)Mem_Realloc(netconn_mempool, (void *)serverlist_cache, sizeof(serverlist_entry_t) * serverlist_maxcachecount);
1604                 }
1605                 entry = &serverlist_cache[n];
1606
1607                 memset(entry, 0, sizeof(*entry));
1608                 // store the data the engine cares about (address and ping)
1609                 strlcpy(entry->info.cname, addressstring, sizeof(entry->info.cname));
1610                 entry->info.ping = 100000;
1611                 entry->querytime = realtime;
1612                 // if not in the slist menu we should print the server to console
1613                 if (serverlist_consoleoutput)
1614                         Con_Printf("querying %s\n", addressstring);
1615                 ++serverlist_cachecount;
1616         }
1617         // if this is the first reply from this server, count it as having replied
1618         pingtime = (int)((realtime - entry->querytime) * 1000.0 + 0.5);
1619         pingtime = bound(0, pingtime, 9999);
1620         if (entry->query == SQS_REFRESHING) {
1621                 entry->info.ping = pingtime;
1622                 entry->query = SQS_QUERIED;
1623         } else {
1624                 // convert to unsigned to catch the -1
1625                 // 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]
1626                 entry->info.ping = min((unsigned) entry->info.ping, (unsigned) pingtime);
1627                 serverreplycount++;
1628         }
1629
1630         // other server info is updated by the caller
1631         return n;
1632 }
1633
1634 static void NetConn_ClientParsePacket_ServerList_UpdateCache(int n)
1635 {
1636         serverlist_entry_t *entry = &serverlist_cache[n];
1637         serverlist_info_t *info = &entry->info;
1638         // update description strings for engine menu and console output
1639         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);
1640         dpsnprintf(entry->line2, sizeof(serverlist_cache[n].line2), "^4%-21.21s %-19.19s ^%c%-17.17s^4 %-20.20s", info->cname, info->game,
1641                         (
1642                          info->gameversion != gameversion.integer
1643                          &&
1644                          !(
1645                                     gameversion_min.integer >= 0 // min/max range set by user/mod?
1646                                  && gameversion_max.integer >= 0
1647                                  && gameversion_min.integer <= info->gameversion // version of server in min/max range?
1648                                  && gameversion_max.integer >= info->gameversion
1649                           )
1650                         ) ? '1' : '4',
1651                         info->mod, info->map);
1652         if (entry->query == SQS_QUERIED)
1653         {
1654                 if(!serverlist_paused)
1655                         ServerList_ViewList_Remove(entry);
1656         }
1657         // if not in the slist menu we should print the server to console (if wanted)
1658         else if( serverlist_consoleoutput )
1659                 Con_Printf("%s\n%s\n", serverlist_cache[n].line1, serverlist_cache[n].line2);
1660         // and finally, update the view set
1661         if(!serverlist_paused)
1662                 ServerList_ViewList_Insert( entry );
1663         //      update the entry's state
1664         serverlist_cache[n].query = SQS_QUERIED;
1665 }
1666
1667 // returns true, if it's sensible to continue the processing
1668 static qboolean NetConn_ClientParsePacket_ServerList_PrepareQuery( int protocol, const char *ipstring, qboolean isfavorite ) {
1669         int n;
1670         serverlist_entry_t *entry;
1671
1672         //      ignore the rest of the message if the serverlist is full
1673         if( serverlist_cachecount == SERVERLIST_TOTALSIZE )
1674                 return false;
1675         //      also ignore     it      if      we      have already queried    it      (other master server    response)
1676         for( n =        0 ; n   < serverlist_cachecount ; n++   )
1677                 if( !strcmp( ipstring, serverlist_cache[ n ].info.cname ) )
1678                         break;
1679
1680         if( n < serverlist_cachecount ) {
1681                 // the entry has already been queried once or
1682                 return true;
1683         }
1684
1685         if (serverlist_maxcachecount <= n)
1686         {
1687                 serverlist_maxcachecount += 64;
1688                 serverlist_cache = (serverlist_entry_t *)Mem_Realloc(netconn_mempool, (void *)serverlist_cache, sizeof(serverlist_entry_t) * serverlist_maxcachecount);
1689         }
1690
1691         entry = &serverlist_cache[n];
1692
1693         memset(entry, 0, sizeof(*entry));
1694         entry->protocol =       protocol;
1695         //      store   the data        the engine cares about (address and     ping)
1696         strlcpy (entry->info.cname, ipstring, sizeof(entry->info.cname));
1697
1698         entry->info.isfavorite = isfavorite;
1699
1700         // no, then reset the ping right away
1701         entry->info.ping = -1;
1702         // we also want to increase the serverlist_cachecount then
1703         serverlist_cachecount++;
1704         serverquerycount++;
1705
1706         entry->query =  SQS_QUERYING;
1707
1708         return true;
1709 }
1710
1711 static void NetConn_ClientParsePacket_ServerList_ParseDPList(lhnetaddress_t *senderaddress, const unsigned char *data, int length, qboolean isextended)
1712 {
1713         masterreplycount++;
1714         if (serverlist_consoleoutput)
1715                 Con_Printf("received DarkPlaces %sserver list...\n", isextended ? "extended " : "");
1716         while (length >= 7)
1717         {
1718                 char ipstring [128];
1719
1720                 // IPv4 address
1721                 if (data[0] == '\\')
1722                 {
1723                         unsigned short port = data[5] * 256 + data[6];
1724
1725                         if (port != 0 && (data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF || data[4] != 0xFF))
1726                                 dpsnprintf (ipstring, sizeof (ipstring), "%u.%u.%u.%u:%hu", data[1], data[2], data[3], data[4], port);
1727
1728                         // move on to next address in packet
1729                         data += 7;
1730                         length -= 7;
1731                 }
1732                 // IPv6 address
1733                 else if (data[0] == '/' && isextended && length >= 19)
1734                 {
1735                         unsigned short port = data[17] * 256 + data[18];
1736
1737                         if (port != 0)
1738                         {
1739 #ifdef WHY_JUST_WHY
1740                                 const char *ifname;
1741                                 char ifnamebuf[16];
1742
1743                                 /// \TODO: make some basic checks of the IP address (broadcast, ...)
1744
1745                                 ifname = LHNETADDRESS_GetInterfaceName(senderaddress, ifnamebuf, sizeof(ifnamebuf));
1746                                 if (ifname != NULL)
1747                                 {
1748                                         dpsnprintf (ipstring, sizeof (ipstring), "[%x:%x:%x:%x:%x:%x:%x:%x%%%s]:%hu",
1749                                                                 (data[1] << 8) | data[2], (data[3] << 8) | data[4], (data[5] << 8) | data[6], (data[7] << 8) | data[8],
1750                                                                 (data[9] << 8) | data[10], (data[11] << 8) | data[12], (data[13] << 8) | data[14], (data[15] << 8) | data[16],
1751                                                                 ifname, port);
1752                                 }
1753                                 else
1754 #endif
1755                                 {
1756                                         dpsnprintf (ipstring, sizeof (ipstring), "[%x:%x:%x:%x:%x:%x:%x:%x]:%hu",
1757                                                                 (data[1] << 8) | data[2], (data[3] << 8) | data[4], (data[5] << 8) | data[6], (data[7] << 8) | data[8],
1758                                                                 (data[9] << 8) | data[10], (data[11] << 8) | data[12], (data[13] << 8) | data[14], (data[15] << 8) | data[16],
1759                                                                 port);
1760                                 }
1761                         }
1762
1763                         // move on to next address in packet
1764                         data += 19;
1765                         length -= 19;
1766                 }
1767                 else
1768                 {
1769                         Con_Print("Error while parsing the server list\n");
1770                         break;
1771                 }
1772
1773                 if (serverlist_consoleoutput && developer_networking.integer)
1774                         Con_Printf("Requesting info from DarkPlaces server %s\n", ipstring);
1775
1776                 if( !NetConn_ClientParsePacket_ServerList_PrepareQuery( PROTOCOL_DARKPLACES7, ipstring, false ) ) {
1777                         break;
1778                 }
1779
1780         }
1781
1782         // begin or resume serverlist queries
1783         serverlist_querysleep = false;
1784         serverlist_querywaittime = realtime + 3;
1785 }
1786 #endif
1787
1788 static int NetConn_ClientParsePacket(lhnetsocket_t *mysocket, unsigned char *data, int length, lhnetaddress_t *peeraddress)
1789 {
1790         qboolean fromserver;
1791         int ret, c;
1792         char *string, addressstring2[128];
1793         char stringbuf[16384];
1794         char senddata[NET_HEADERSIZE+NET_MAXMESSAGE+CRYPTO_HEADERSIZE];
1795         size_t sendlength;
1796 #ifdef CONFIG_MENU
1797         char infostringvalue[MAX_INPUTLINE];
1798         char ipstring[32];
1799         const char *s;
1800 #endif
1801         char vabuf[1024];
1802
1803         // quakeworld ingame packet
1804         fromserver = cls.netcon && mysocket == cls.netcon->mysocket && !LHNETADDRESS_Compare(&cls.netcon->peeraddress, peeraddress);
1805
1806         // convert the address to a string incase we need it
1807         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1808
1809         if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
1810         {
1811                 // received a command string - strip off the packaging and put it
1812                 // into our string buffer with NULL termination
1813                 data += 4;
1814                 length -= 4;
1815                 length = min(length, (int)sizeof(stringbuf) - 1);
1816                 memcpy(stringbuf, data, length);
1817                 stringbuf[length] = 0;
1818                 string = stringbuf;
1819
1820                 if (developer_networking.integer)
1821                 {
1822                         Con_Printf("NetConn_ClientParsePacket: %s sent us a command:\n", addressstring2);
1823                         Com_HexDumpToConsole(data, length);
1824                 }
1825
1826                 sendlength = sizeof(senddata) - 4;
1827                 switch(Crypto_ClientParsePacket(string, length, senddata+4, &sendlength, peeraddress))
1828                 {
1829                         case CRYPTO_NOMATCH:
1830                                 // nothing to do
1831                                 break;
1832                         case CRYPTO_MATCH:
1833                                 if(sendlength)
1834                                 {
1835                                         memcpy(senddata, "\377\377\377\377", 4);
1836                                         NetConn_Write(mysocket, senddata, (int)sendlength+4, peeraddress);
1837                                 }
1838                                 break;
1839                         case CRYPTO_DISCARD:
1840                                 if(sendlength)
1841                                 {
1842                                         memcpy(senddata, "\377\377\377\377", 4);
1843                                         NetConn_Write(mysocket, senddata, (int)sendlength+4, peeraddress);
1844                                 }
1845                                 return true;
1846                                 break;
1847                         case CRYPTO_REPLACE:
1848                                 string = senddata+4;
1849                                 length = (int)sendlength;
1850                                 break;
1851                 }
1852
1853                 if (length >= 10 && !memcmp(string, "challenge ", 10) && cls.rcon_trying)
1854                 {
1855                         int i = 0, j;
1856                         for (j = 0;j < MAX_RCONS;j++)
1857                         {
1858                                 // note: this value from i is used outside the loop too...
1859                                 i = (cls.rcon_ringpos + j) % MAX_RCONS;
1860                                 if(cls.rcon_commands[i][0])
1861                                         if (!LHNETADDRESS_Compare(peeraddress, &cls.rcon_addresses[i]))
1862                                                 break;
1863                         }
1864                         if (j < MAX_RCONS)
1865                         {
1866                                 char buf[1500];
1867                                 char argbuf[1500];
1868                                 const char *e;
1869                                 int n;
1870                                 dpsnprintf(argbuf, sizeof(argbuf), "%s %s", string + 10, cls.rcon_commands[i]);
1871                                 memcpy(buf, "\377\377\377\377srcon HMAC-MD4 CHALLENGE ", 29);
1872
1873                                 e = strchr(rcon_password.string, ' ');
1874                                 n = e ? e-rcon_password.string : (int)strlen(rcon_password.string);
1875
1876                                 if(HMAC_MDFOUR_16BYTES((unsigned char *) (buf + 29), (unsigned char *) argbuf, (int)strlen(argbuf), (unsigned char *) rcon_password.string, n))
1877                                 {
1878                                         int k;
1879                                         buf[45] = ' ';
1880                                         strlcpy(buf + 46, argbuf, sizeof(buf) - 46);
1881                                         NetConn_Write(mysocket, buf, 46 + (int)strlen(buf + 46), peeraddress);
1882                                         cls.rcon_commands[i][0] = 0;
1883                                         --cls.rcon_trying;
1884
1885                                         for (k = 0;k < MAX_RCONS;k++)
1886                                                 if(cls.rcon_commands[k][0])
1887                                                         if (!LHNETADDRESS_Compare(peeraddress, &cls.rcon_addresses[k]))
1888                                                                 break;
1889                                         if(k < MAX_RCONS)
1890                                         {
1891                                                 int l;
1892                                                 NetConn_WriteString(mysocket, "\377\377\377\377getchallenge", peeraddress);
1893                                                 // extend the timeout on other requests as we asked for a challenge
1894                                                 for (l = 0;l < MAX_RCONS;l++)
1895                                                         if(cls.rcon_commands[l][0])
1896                                                                 if (!LHNETADDRESS_Compare(peeraddress, &cls.rcon_addresses[l]))
1897                                                                         cls.rcon_timeout[l] = realtime + rcon_secure_challengetimeout.value;
1898                                         }
1899
1900                                         return true; // we used up the challenge, so we can't use this oen for connecting now anyway
1901                                 }
1902                         }
1903                 }
1904                 if (length >= 10 && !memcmp(string, "challenge ", 10) && cls.connect_trying)
1905                 {
1906                         // darkplaces or quake3
1907                         char protocolnames[1400];
1908                         Con_DPrintf("\"%s\" received, sending connect request back to %s\n", string, addressstring2);
1909                         if (net_sourceaddresscheck.integer && LHNETADDRESS_Compare(peeraddress, &cls.connect_address)) {
1910                                 Con_DPrintf("challenge message from wrong server %s\n", addressstring2);
1911                                 return true;
1912                         }
1913                         Protocol_Names(protocolnames, sizeof(protocolnames));
1914 #ifdef CONFIG_MENU
1915                         M_Update_Return_Reason("Got challenge response");
1916 #endif
1917                         // update the server IP in the userinfo (QW servers expect this, and it is used by the reconnect command)
1918                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ip", addressstring2);
1919                         // TODO: add userinfo stuff here instead of using NQ commands?
1920                         NetConn_WriteString(mysocket, va(vabuf, sizeof(vabuf), "\377\377\377\377connect\\protocol\\darkplaces 3\\protocols\\%s%s\\challenge\\%s", protocolnames, cls.connect_userinfo, string + 10), peeraddress);
1921                         return true;
1922                 }
1923                 if (length == 6 && !memcmp(string, "accept", 6) && cls.connect_trying)
1924                 {
1925                         // darkplaces or quake3
1926                         if (net_sourceaddresscheck.integer && LHNETADDRESS_Compare(peeraddress, &cls.connect_address)) {
1927                                 Con_DPrintf("accept message from wrong server %s\n", addressstring2);
1928                                 return true;
1929                         }
1930 #ifdef CONFIG_MENU
1931                         M_Update_Return_Reason("Accepted");
1932 #endif
1933                         NetConn_ConnectionEstablished(mysocket, peeraddress, PROTOCOL_DARKPLACES3);
1934                         return true;
1935                 }
1936                 if (length > 7 && !memcmp(string, "reject ", 7) && cls.connect_trying)
1937                 {
1938                         char rejectreason[128];
1939                         if (net_sourceaddresscheck.integer && LHNETADDRESS_Compare(peeraddress, &cls.connect_address)) {
1940                                 Con_DPrintf("reject message from wrong server %s\n", addressstring2);
1941                                 return true;
1942                         }
1943                         cls.connect_trying = false;
1944                         string += 7;
1945                         length = min(length - 7, (int)sizeof(rejectreason) - 1);
1946                         memcpy(rejectreason, string, length);
1947                         rejectreason[length] = 0;
1948 #ifdef CONFIG_MENU
1949                         M_Update_Return_Reason(rejectreason);
1950 #endif
1951                         return true;
1952                 }
1953 #ifdef CONFIG_MENU
1954                 if (length >= 15 && !memcmp(string, "statusResponse\x0A", 15))
1955                 {
1956                         serverlist_info_t *info;
1957                         char *p;
1958                         int n;
1959
1960                         string += 15;
1961                         // search the cache for this server and update it
1962                         n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2);
1963                         if (n < 0)
1964                                 return true;
1965
1966                         info = &serverlist_cache[n].info;
1967                         info->game[0] = 0;
1968                         info->mod[0]  = 0;
1969                         info->map[0]  = 0;
1970                         info->name[0] = 0;
1971                         info->qcstatus[0] = 0;
1972                         info->players[0] = 0;
1973                         info->protocol = -1;
1974                         info->numplayers = 0;
1975                         info->numbots = -1;
1976                         info->maxplayers  = 0;
1977                         info->gameversion = 0;
1978
1979                         p = strchr(string, '\n');
1980                         if(p)
1981                         {
1982                                 *p = 0; // cut off the string there
1983                                 ++p;
1984                         }
1985                         else
1986                                 Con_Printf("statusResponse without players block?\n");
1987
1988                         if ((s = InfoString_GetValue(string, "gamename"     , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->game, s, sizeof (info->game));
1989                         if ((s = InfoString_GetValue(string, "modname"      , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->mod , s, sizeof (info->mod ));
1990                         if ((s = InfoString_GetValue(string, "mapname"      , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->map , s, sizeof (info->map ));
1991                         if ((s = InfoString_GetValue(string, "hostname"     , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->name, s, sizeof (info->name));
1992                         if ((s = InfoString_GetValue(string, "protocol"     , infostringvalue, sizeof(infostringvalue))) != NULL) info->protocol = atoi(s);
1993                         if ((s = InfoString_GetValue(string, "clients"      , infostringvalue, sizeof(infostringvalue))) != NULL) info->numplayers = atoi(s);
1994                         if ((s = InfoString_GetValue(string, "bots"         , infostringvalue, sizeof(infostringvalue))) != NULL) info->numbots = atoi(s);
1995                         if ((s = InfoString_GetValue(string, "sv_maxclients", infostringvalue, sizeof(infostringvalue))) != NULL) info->maxplayers = atoi(s);
1996                         if ((s = InfoString_GetValue(string, "gameversion"  , infostringvalue, sizeof(infostringvalue))) != NULL) info->gameversion = atoi(s);
1997                         if ((s = InfoString_GetValue(string, "qcstatus"     , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->qcstatus, s, sizeof(info->qcstatus));
1998                         if (p                                                                                         != NULL) strlcpy(info->players, p, sizeof(info->players));
1999                         info->numhumans = info->numplayers - max(0, info->numbots);
2000                         info->freeslots = info->maxplayers - info->numplayers;
2001
2002                         NetConn_ClientParsePacket_ServerList_UpdateCache(n);
2003
2004                         return true;
2005                 }
2006                 if (length >= 13 && !memcmp(string, "infoResponse\x0A", 13))
2007                 {
2008                         serverlist_info_t *info;
2009                         int n;
2010
2011                         string += 13;
2012                         // search the cache for this server and update it
2013                         n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2);
2014                         if (n < 0)
2015                                 return true;
2016
2017                         info = &serverlist_cache[n].info;
2018                         info->game[0] = 0;
2019                         info->mod[0]  = 0;
2020                         info->map[0]  = 0;
2021                         info->name[0] = 0;
2022                         info->qcstatus[0] = 0;
2023                         info->players[0] = 0;
2024                         info->protocol = -1;
2025                         info->numplayers = 0;
2026                         info->numbots = -1;
2027                         info->maxplayers  = 0;
2028                         info->gameversion = 0;
2029
2030                         if ((s = InfoString_GetValue(string, "gamename"     , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->game, s, sizeof (info->game));
2031                         if ((s = InfoString_GetValue(string, "modname"      , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->mod , s, sizeof (info->mod ));
2032                         if ((s = InfoString_GetValue(string, "mapname"      , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->map , s, sizeof (info->map ));
2033                         if ((s = InfoString_GetValue(string, "hostname"     , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->name, s, sizeof (info->name));
2034                         if ((s = InfoString_GetValue(string, "protocol"     , infostringvalue, sizeof(infostringvalue))) != NULL) info->protocol = atoi(s);
2035                         if ((s = InfoString_GetValue(string, "clients"      , infostringvalue, sizeof(infostringvalue))) != NULL) info->numplayers = atoi(s);
2036                         if ((s = InfoString_GetValue(string, "bots"         , infostringvalue, sizeof(infostringvalue))) != NULL) info->numbots = atoi(s);
2037                         if ((s = InfoString_GetValue(string, "sv_maxclients", infostringvalue, sizeof(infostringvalue))) != NULL) info->maxplayers = atoi(s);
2038                         if ((s = InfoString_GetValue(string, "gameversion"  , infostringvalue, sizeof(infostringvalue))) != NULL) info->gameversion = atoi(s);
2039                         if ((s = InfoString_GetValue(string, "qcstatus"     , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->qcstatus, s, sizeof(info->qcstatus));
2040                         info->numhumans = info->numplayers - max(0, info->numbots);
2041                         info->freeslots = info->maxplayers - info->numplayers;
2042
2043                         NetConn_ClientParsePacket_ServerList_UpdateCache(n);
2044
2045                         return true;
2046                 }
2047                 if (!strncmp(string, "getserversResponse\\", 19) && serverlist_cachecount < SERVERLIST_TOTALSIZE)
2048                 {
2049                         // Extract the IP addresses
2050                         data += 18;
2051                         length -= 18;
2052                         NetConn_ClientParsePacket_ServerList_ParseDPList(peeraddress, data, length, false);
2053                         return true;
2054                 }
2055                 if (!strncmp(string, "getserversExtResponse", 21) && serverlist_cachecount < SERVERLIST_TOTALSIZE)
2056                 {
2057                         // Extract the IP addresses
2058                         data += 21;
2059                         length -= 21;
2060                         NetConn_ClientParsePacket_ServerList_ParseDPList(peeraddress, data, length, true);
2061                         return true;
2062                 }
2063                 if (!memcmp(string, "d\n", 2) && serverlist_cachecount < SERVERLIST_TOTALSIZE)
2064                 {
2065                         // Extract the IP addresses
2066                         data += 2;
2067                         length -= 2;
2068                         masterreplycount++;
2069                         if (serverlist_consoleoutput)
2070                                 Con_Printf("received QuakeWorld server list from %s...\n", addressstring2);
2071                         while (length >= 6 && (data[0] != 0xFF || data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF) && data[4] * 256 + data[5] != 0)
2072                         {
2073                                 dpsnprintf (ipstring, sizeof (ipstring), "%u.%u.%u.%u:%u", data[0], data[1], data[2], data[3], data[4] * 256 + data[5]);
2074                                 if (serverlist_consoleoutput && developer_networking.integer)
2075                                         Con_Printf("Requesting info from QuakeWorld server %s\n", ipstring);
2076
2077                                 if( !NetConn_ClientParsePacket_ServerList_PrepareQuery( PROTOCOL_QUAKEWORLD, ipstring, false ) ) {
2078                                         break;
2079                                 }
2080
2081                                 // move on to next address in packet
2082                                 data += 6;
2083                                 length -= 6;
2084                         }
2085                         // begin or resume serverlist queries
2086                         serverlist_querysleep = false;
2087                         serverlist_querywaittime = realtime + 3;
2088                         return true;
2089                 }
2090 #endif
2091                 if (!strncmp(string, "extResponse ", 12))
2092                 {
2093                         ++cl_net_extresponse_count;
2094                         if(cl_net_extresponse_count > NET_EXTRESPONSE_MAX)
2095                                 cl_net_extresponse_count = NET_EXTRESPONSE_MAX;
2096                         cl_net_extresponse_last = (cl_net_extresponse_last + 1) % NET_EXTRESPONSE_MAX;
2097                         dpsnprintf(cl_net_extresponse[cl_net_extresponse_last], sizeof(cl_net_extresponse[cl_net_extresponse_last]), "\"%s\" %s", addressstring2, string + 12);
2098                         return true;
2099                 }
2100                 if (!strncmp(string, "ping", 4))
2101                 {
2102                         if (developer_extra.integer)
2103                                 Con_DPrintf("Received ping from %s, sending ack\n", addressstring2);
2104                         NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
2105                         return true;
2106                 }
2107                 if (!strncmp(string, "ack", 3))
2108                         return true;
2109                 // QuakeWorld compatibility
2110                 if (length > 1 && string[0] == 'c' && (string[1] == '-' || (string[1] >= '0' && string[1] <= '9')) && cls.connect_trying)
2111                 {
2112                         // challenge message
2113                         if (net_sourceaddresscheck.integer && LHNETADDRESS_Compare(peeraddress, &cls.connect_address)) {
2114                                 Con_DPrintf("c message from wrong server %s\n", addressstring2);
2115                                 return true;
2116                         }
2117                         Con_Printf("challenge %s received, sending QuakeWorld connect request back to %s\n", string + 1, addressstring2);
2118 #ifdef CONFIG_MENU
2119                         M_Update_Return_Reason("Got QuakeWorld challenge response");
2120 #endif
2121                         cls.qw_qport = qport.integer;
2122                         // update the server IP in the userinfo (QW servers expect this, and it is used by the reconnect command)
2123                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ip", addressstring2);
2124                         NetConn_WriteString(mysocket, va(vabuf, sizeof(vabuf), "\377\377\377\377connect %i %i %i \"%s%s\"\n", 28, cls.qw_qport, atoi(string + 1), cls.userinfo, cls.connect_userinfo), peeraddress);
2125                         return true;
2126                 }
2127                 if (length >= 1 && string[0] == 'j' && cls.connect_trying)
2128                 {
2129                         // accept message
2130                         if (net_sourceaddresscheck.integer && LHNETADDRESS_Compare(peeraddress, &cls.connect_address)) {
2131                                 Con_DPrintf("j message from wrong server %s\n", addressstring2);
2132                                 return true;
2133                         }
2134 #ifdef CONFIG_MENU
2135                         M_Update_Return_Reason("QuakeWorld Accepted");
2136 #endif
2137                         NetConn_ConnectionEstablished(mysocket, peeraddress, PROTOCOL_QUAKEWORLD);
2138                         return true;
2139                 }
2140                 if (length > 2 && !memcmp(string, "n\\", 2))
2141                 {
2142 #ifdef CONFIG_MENU
2143                         serverlist_info_t *info;
2144                         int n;
2145
2146                         // qw server status
2147                         if (serverlist_consoleoutput && developer_networking.integer >= 2)
2148                                 Con_Printf("QW server status from server at %s:\n%s\n", addressstring2, string + 1);
2149
2150                         string += 1;
2151                         // search the cache for this server and update it
2152                         n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2);
2153                         if (n < 0)
2154                                 return true;
2155
2156                         info = &serverlist_cache[n].info;
2157                         strlcpy(info->game, "QuakeWorld", sizeof(info->game));
2158                         if ((s = InfoString_GetValue(string, "*gamedir"     , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->mod , s, sizeof (info->mod ));else info->mod[0]  = 0;
2159                         if ((s = InfoString_GetValue(string, "map"          , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->map , s, sizeof (info->map ));else info->map[0]  = 0;
2160                         if ((s = InfoString_GetValue(string, "hostname"     , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->name, s, sizeof (info->name));else info->name[0] = 0;
2161                         info->protocol = 0;
2162                         info->numplayers = 0; // updated below
2163                         info->numhumans = 0; // updated below
2164                         if ((s = InfoString_GetValue(string, "maxclients"   , infostringvalue, sizeof(infostringvalue))) != NULL) info->maxplayers = atoi(s);else info->maxplayers  = 0;
2165                         if ((s = InfoString_GetValue(string, "gameversion"  , infostringvalue, sizeof(infostringvalue))) != NULL) info->gameversion = atoi(s);else info->gameversion = 0;
2166
2167                         // count active players on server
2168                         // (we could gather more info, but we're just after the number)
2169                         s = strchr(string, '\n');
2170                         if (s)
2171                         {
2172                                 s++;
2173                                 while (s < string + length)
2174                                 {
2175                                         for (;s < string + length && *s != '\n';s++)
2176                                                 ;
2177                                         if (s >= string + length)
2178                                                 break;
2179                                         info->numplayers++;
2180                                         info->numhumans++;
2181                                         s++;
2182                                 }
2183                         }
2184
2185                         NetConn_ClientParsePacket_ServerList_UpdateCache(n);
2186 #endif
2187                         return true;
2188                 }
2189                 if (string[0] == 'n')
2190                 {
2191                         // qw print command, used by rcon replies too
2192                         if (net_sourceaddresscheck.integer && LHNETADDRESS_Compare(peeraddress, &cls.connect_address) && LHNETADDRESS_Compare(peeraddress, &cls.rcon_address)) {
2193                                 Con_DPrintf("n message from wrong server %s\n", addressstring2);
2194                                 return true;
2195                         }
2196                         Con_Printf("QW print command from server at %s:\n%s\n", addressstring2, string + 1);
2197                 }
2198                 // we may not have liked the packet, but it was a command packet, so
2199                 // we're done processing this packet now
2200                 return true;
2201         }
2202         // quakeworld ingame packet
2203         if (fromserver && cls.protocol == PROTOCOL_QUAKEWORLD && length >= 8 && (ret = NetConn_ReceivedMessage(cls.netcon, data, length, cls.protocol, net_messagetimeout.value)) == 2)
2204         {
2205                 ret = 0;
2206                 CL_ParseServerMessage();
2207                 return ret;
2208         }
2209         // netquake control packets, supported for compatibility only
2210         if (length >= 5 && BuffBigLong(data) == ((int)NETFLAG_CTL | length) && !ENCRYPTION_REQUIRED)
2211         {
2212 #ifdef CONFIG_MENU
2213                 int n;
2214                 serverlist_info_t *info;
2215 #endif
2216
2217                 data += 4;
2218                 length -= 4;
2219                 SZ_Clear(&cl_message);
2220                 SZ_Write(&cl_message, data, length);
2221                 MSG_BeginReading(&cl_message);
2222                 c = MSG_ReadByte(&cl_message);
2223                 switch (c)
2224                 {
2225                 case CCREP_ACCEPT:
2226                         if (developer_extra.integer)
2227                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREP_ACCEPT from %s.\n", addressstring2);
2228                         if (cls.connect_trying)
2229                         {
2230                                 lhnetaddress_t clientportaddress;
2231                                 if (net_sourceaddresscheck.integer && LHNETADDRESS_Compare(peeraddress, &cls.connect_address)) {
2232                                         Con_DPrintf("CCREP_ACCEPT message from wrong server %s\n", addressstring2);
2233                                         break;
2234                                 }
2235                                 clientportaddress = *peeraddress;
2236                                 LHNETADDRESS_SetPort(&clientportaddress, MSG_ReadLong(&cl_message));
2237                                 // extra ProQuake stuff
2238                                 if (length >= 6)
2239                                         cls.proquake_servermod = MSG_ReadByte(&cl_message); // MOD_PROQUAKE
2240                                 else
2241                                         cls.proquake_servermod = 0;
2242                                 if (length >= 7)
2243                                         cls.proquake_serverversion = MSG_ReadByte(&cl_message); // version * 10
2244                                 else
2245                                         cls.proquake_serverversion = 0;
2246                                 if (length >= 8)
2247                                         cls.proquake_serverflags = MSG_ReadByte(&cl_message); // flags (mainly PQF_CHEATFREE)
2248                                 else
2249                                         cls.proquake_serverflags = 0;
2250                                 if (cls.proquake_servermod == 1)
2251                                         Con_Printf("Connected to ProQuake %.1f server, enabling precise aim\n", cls.proquake_serverversion / 10.0f);
2252                                 // update the server IP in the userinfo (QW servers expect this, and it is used by the reconnect command)
2253                                 InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ip", addressstring2);
2254 #ifdef CONFIG_MENU
2255                                 M_Update_Return_Reason("Accepted");
2256 #endif
2257                                 NetConn_ConnectionEstablished(mysocket, &clientportaddress, PROTOCOL_QUAKE);
2258                         }
2259                         break;
2260                 case CCREP_REJECT:
2261                         if (developer_extra.integer) {
2262                                 Con_DPrintf("CCREP_REJECT message from wrong server %s\n", addressstring2);
2263                                 break;
2264                         }
2265                         if (net_sourceaddresscheck.integer && LHNETADDRESS_Compare(peeraddress, &cls.connect_address))
2266                                 break;
2267                         cls.connect_trying = false;
2268 #ifdef CONFIG_MENU
2269                         M_Update_Return_Reason((char *)MSG_ReadString(&cl_message, cl_readstring, sizeof(cl_readstring)));
2270 #endif
2271                         break;
2272                 case CCREP_SERVER_INFO:
2273                         if (developer_extra.integer)
2274                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREP_SERVER_INFO from %s.\n", addressstring2);
2275 #ifdef CONFIG_MENU
2276                         // LordHavoc: because the quake server may report weird addresses
2277                         // we just ignore it and keep the real address
2278                         MSG_ReadString(&cl_message, cl_readstring, sizeof(cl_readstring));
2279                         // search the cache for this server and update it
2280                         n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2);
2281                         if (n < 0)
2282                                 break;
2283
2284                         info = &serverlist_cache[n].info;
2285                         strlcpy(info->game, "Quake", sizeof(info->game));
2286                         strlcpy(info->mod , "", sizeof(info->mod)); // mod name is not specified
2287                         strlcpy(info->name, MSG_ReadString(&cl_message, cl_readstring, sizeof(cl_readstring)), sizeof(info->name));
2288                         strlcpy(info->map , MSG_ReadString(&cl_message, cl_readstring, sizeof(cl_readstring)), sizeof(info->map));
2289                         info->numplayers = MSG_ReadByte(&cl_message);
2290                         info->maxplayers = MSG_ReadByte(&cl_message);
2291                         info->protocol = MSG_ReadByte(&cl_message);
2292
2293                         NetConn_ClientParsePacket_ServerList_UpdateCache(n);
2294 #endif
2295                         break;
2296                 case CCREP_RCON: // RocketGuy: ProQuake rcon support
2297                         if (net_sourceaddresscheck.integer && LHNETADDRESS_Compare(peeraddress, &cls.rcon_address)) {
2298                                 Con_DPrintf("CCREP_RCON message from wrong server %s\n", addressstring2);
2299                                 break;
2300                         }
2301                         if (developer_extra.integer)
2302                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREP_RCON from %s.\n", addressstring2);
2303
2304                         Con_Printf("%s\n", MSG_ReadString(&cl_message, cl_readstring, sizeof(cl_readstring)));
2305                         break;
2306                 case CCREP_PLAYER_INFO:
2307                         // we got a CCREP_PLAYER_INFO??
2308                         //if (developer_extra.integer)
2309                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_PLAYER_INFO from %s.\n", addressstring2);
2310                         break;
2311                 case CCREP_RULE_INFO:
2312                         // we got a CCREP_RULE_INFO??
2313                         //if (developer_extra.integer)
2314                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_RULE_INFO from %s.\n", addressstring2);
2315                         break;
2316                 default:
2317                         break;
2318                 }
2319                 SZ_Clear(&cl_message);
2320                 // we may not have liked the packet, but it was a valid control
2321                 // packet, so we're done processing this packet now
2322                 return true;
2323         }
2324         ret = 0;
2325         if (fromserver && length >= (int)NET_HEADERSIZE && (ret = NetConn_ReceivedMessage(cls.netcon, data, length, cls.protocol, net_messagetimeout.value)) == 2)
2326                 CL_ParseServerMessage();
2327         return ret;
2328 }
2329
2330 #ifdef CONFIG_MENU
2331 void NetConn_QueryQueueFrame(void)
2332 {
2333         int index;
2334         int queries;
2335         int maxqueries;
2336         double timeouttime;
2337         static double querycounter = 0;
2338
2339         if(!net_slist_pause.integer && serverlist_paused)
2340                 ServerList_RebuildViewList();
2341         serverlist_paused = net_slist_pause.integer != 0;
2342
2343         if (serverlist_querysleep)
2344                 return;
2345
2346         // apply a cool down time after master server replies,
2347         // to avoid messing up the ping times on the servers
2348         if (serverlist_querywaittime > realtime)
2349                 return;
2350
2351         // each time querycounter reaches 1.0 issue a query
2352         querycounter += cl.realframetime * net_slist_queriespersecond.value;
2353         maxqueries = (int)querycounter;
2354         maxqueries = bound(0, maxqueries, net_slist_queriesperframe.integer);
2355         querycounter -= maxqueries;
2356
2357         if( maxqueries == 0 ) {
2358                 return;
2359         }
2360
2361         //      scan serverlist and issue queries as needed
2362         serverlist_querysleep = true;
2363
2364         timeouttime     = realtime - net_slist_timeout.value;
2365         for( index = 0, queries = 0 ;   index   < serverlist_cachecount &&      queries < maxqueries    ; index++ )
2366         {
2367                 serverlist_entry_t *entry = &serverlist_cache[ index ];
2368                 if( entry->query != SQS_QUERYING && entry->query != SQS_REFRESHING )
2369                 {
2370                         continue;
2371                 }
2372
2373                 serverlist_querysleep   = false;
2374                 if( entry->querycounter !=      0 && entry->querytime > timeouttime     )
2375                 {
2376                         continue;
2377                 }
2378
2379                 if( entry->querycounter !=      (unsigned) net_slist_maxtries.integer )
2380                 {
2381                         lhnetaddress_t  address;
2382                         int socket;
2383
2384                         LHNETADDRESS_FromString(&address, entry->info.cname, 0);
2385                         if      (entry->protocol == PROTOCOL_QUAKEWORLD)
2386                         {
2387                                 for (socket     = 0; socket     < cl_numsockets ;       socket++)
2388                                         NetConn_WriteString(cl_sockets[socket], "\377\377\377\377status\n", &address);
2389                         }
2390                         else
2391                         {
2392                                 for (socket     = 0; socket     < cl_numsockets ;       socket++)
2393                                         NetConn_WriteString(cl_sockets[socket], "\377\377\377\377getstatus", &address);
2394                         }
2395
2396                         //      update the entry fields
2397                         entry->querytime = realtime;
2398                         entry->querycounter++;
2399
2400                         // if not in the slist menu we should print the server to console
2401                         if (serverlist_consoleoutput)
2402                                 Con_Printf("querying %25s (%i. try)\n", entry->info.cname, entry->querycounter);
2403
2404                         queries++;
2405                 }
2406                 else
2407                 {
2408                         // have we tried to refresh this server?
2409                         if( entry->query == SQS_REFRESHING ) {
2410                                 // yes, so update the reply count (since its not responding anymore)
2411                                 serverreplycount--;
2412                                 if(!serverlist_paused)
2413                                         ServerList_ViewList_Remove(entry);
2414                         }
2415                         entry->query = SQS_TIMEDOUT;
2416                 }
2417         }
2418 }
2419 #endif
2420
2421 void NetConn_ClientFrame(void)
2422 {
2423         int i, length;
2424         lhnetaddress_t peeraddress;
2425         unsigned char readbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
2426         NetConn_UpdateSockets();
2427         if (cls.connect_trying && cls.connect_nextsendtime < realtime)
2428         {
2429 #ifdef CONFIG_MENU
2430                 if (cls.connect_remainingtries == 0)
2431                         M_Update_Return_Reason("Connect: Waiting 10 seconds for reply");
2432 #endif
2433                 cls.connect_nextsendtime = realtime + 1;
2434                 cls.connect_remainingtries--;
2435                 if (cls.connect_remainingtries <= -10)
2436                 {
2437                         cls.connect_trying = false;
2438 #ifdef CONFIG_MENU
2439                         M_Update_Return_Reason("Connect: Failed");
2440 #endif
2441                         return;
2442                 }
2443                 // try challenge first (newer DP server or QW)
2444                 NetConn_WriteString(cls.connect_mysocket, "\377\377\377\377getchallenge", &cls.connect_address);
2445                 // then try netquake as a fallback (old server, or netquake)
2446                 SZ_Clear(&cl_message);
2447                 // save space for the header, filled in later
2448                 MSG_WriteLong(&cl_message, 0);
2449                 MSG_WriteByte(&cl_message, CCREQ_CONNECT);
2450                 MSG_WriteString(&cl_message, "QUAKE");
2451                 MSG_WriteByte(&cl_message, NET_PROTOCOL_VERSION);
2452                 // extended proquake stuff
2453                 MSG_WriteByte(&cl_message, 1); // mod = MOD_PROQUAKE
2454                 // this version matches ProQuake 3.40, the first version to support
2455                 // the NAT fix, and it only supports the NAT fix for ProQuake 3.40 or
2456                 // higher clients, so we pretend we are that version...
2457                 MSG_WriteByte(&cl_message, 34); // version * 10
2458                 MSG_WriteByte(&cl_message, 0); // flags
2459                 MSG_WriteLong(&cl_message, 0); // password
2460                 // write the packetsize now...
2461                 StoreBigLong(cl_message.data, NETFLAG_CTL | (cl_message.cursize & NETFLAG_LENGTH_MASK));
2462                 NetConn_Write(cls.connect_mysocket, cl_message.data, cl_message.cursize, &cls.connect_address);
2463                 SZ_Clear(&cl_message);
2464         }
2465         for (i = 0;i < cl_numsockets;i++)
2466         {
2467                 while (cl_sockets[i] && (length = NetConn_Read(cl_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
2468                 {
2469 //                      R_TimeReport("clientreadnetwork");
2470                         NetConn_ClientParsePacket(cl_sockets[i], readbuffer, length, &peeraddress);
2471 //                      R_TimeReport("clientparsepacket");
2472                 }
2473         }
2474 #ifdef CONFIG_MENU
2475         NetConn_QueryQueueFrame();
2476 #endif
2477         if (cls.netcon && realtime > cls.netcon->timeout && !sv.active)
2478         {
2479                 Con_Print("Connection timed out\n");
2480                 CL_Disconnect();
2481                 SV_LockThreadMutex();
2482                 Host_ShutdownServer ();
2483                 SV_UnlockThreadMutex();
2484         }
2485 }
2486
2487 static void NetConn_BuildChallengeString(char *buffer, int bufferlength)
2488 {
2489         int i;
2490         char c;
2491         for (i = 0;i < bufferlength - 1;i++)
2492         {
2493                 do
2494                 {
2495                         c = rand () % (127 - 33) + 33;
2496                 } while (c == '\\' || c == ';' || c == '"' || c == '%' || c == '/');
2497                 buffer[i] = c;
2498         }
2499         buffer[i] = 0;
2500 }
2501
2502 /// (div0) build the full response only if possible; better a getinfo response than no response at all if getstatus won't fit
2503 static qboolean NetConn_BuildStatusResponse(const char* challenge, char* out_msg, size_t out_size, qboolean fullstatus)
2504 {
2505         prvm_prog_t *prog = SVVM_prog;
2506         char qcstatus[256];
2507         unsigned int nb_clients = 0, nb_bots = 0, i;
2508         int length;
2509         char teambuf[3];
2510         const char *crypto_idstring;
2511         const char *str;
2512
2513         // How many clients are there?
2514         for (i = 0;i < (unsigned int)svs.maxclients;i++)
2515         {
2516                 if (svs.clients[i].active)
2517                 {
2518                         nb_clients++;
2519                         if (!svs.clients[i].netconnection)
2520                                 nb_bots++;
2521                 }
2522         }
2523
2524         *qcstatus = 0;
2525         str = PRVM_GetString(prog, PRVM_serverglobalstring(worldstatus));
2526         if(str && *str)
2527         {
2528                 char *p;
2529                 const char *q;
2530                 p = qcstatus;
2531                 for(q = str; *q && (size_t)(p - qcstatus) < (sizeof(qcstatus) - 1); ++q)
2532                         if(*q != '\\' && *q != '\n')
2533                                 *p++ = *q;
2534                 *p = 0;
2535         }
2536
2537         /// \TODO: we should add more information for the full status string
2538         crypto_idstring = Crypto_GetInfoResponseDataString();
2539         length = dpsnprintf(out_msg, out_size,
2540                                                 "\377\377\377\377%s\x0A"
2541                                                 "\\gamename\\%s\\modname\\%s\\gameversion\\%d\\sv_maxclients\\%d"
2542                                                 "\\clients\\%d\\bots\\%d\\mapname\\%s\\hostname\\%s\\protocol\\%d"
2543                                                 "%s%s"
2544                                                 "%s%s"
2545                                                 "%s%s"
2546                                                 "%s",
2547                                                 fullstatus ? "statusResponse" : "infoResponse",
2548                                                 gamenetworkfiltername, com_modname, gameversion.integer, svs.maxclients,
2549                                                 nb_clients, nb_bots, sv.worldbasename, hostname.string, NET_PROTOCOL_VERSION,
2550                                                 *qcstatus ? "\\qcstatus\\" : "", qcstatus,
2551                                                 challenge ? "\\challenge\\" : "", challenge ? challenge : "",
2552                                                 crypto_idstring ? "\\d0_blind_id\\" : "", crypto_idstring ? crypto_idstring : "",
2553                                                 fullstatus ? "\n" : "");
2554
2555         // Make sure it fits in the buffer
2556         if (length < 0)
2557                 goto bad;
2558
2559         if (fullstatus)
2560         {
2561                 char *ptr;
2562                 int left;
2563                 int savelength;
2564
2565                 savelength = length;
2566
2567                 ptr = out_msg + length;
2568                 left = (int)out_size - length;
2569
2570                 for (i = 0;i < (unsigned int)svs.maxclients;i++)
2571                 {
2572                         client_t *cl = &svs.clients[i];
2573                         if (cl->active)
2574                         {
2575                                 int nameind, cleanind, pingvalue;
2576                                 char curchar;
2577                                 char cleanname [sizeof(cl->name)];
2578                                 const char *str;
2579                                 prvm_edict_t *ed;
2580
2581                                 // Remove all characters '"' and '\' in the player name
2582                                 nameind = 0;
2583                                 cleanind = 0;
2584                                 do
2585                                 {
2586                                         curchar = cl->name[nameind++];
2587                                         if (curchar != '"' && curchar != '\\')
2588                                         {
2589                                                 cleanname[cleanind++] = curchar;
2590                                                 if (cleanind == sizeof(cleanname) - 1)
2591                                                         break;
2592                                         }
2593                                 } while (curchar != '\0');
2594                                 cleanname[cleanind] = 0; // cleanind is always a valid index even at this point
2595
2596                                 pingvalue = (int)(cl->ping * 1000.0f);
2597                                 if(cl->netconnection)
2598                                         pingvalue = bound(1, pingvalue, 9999);
2599                                 else
2600                                         pingvalue = 0;
2601
2602                                 *qcstatus = 0;
2603                                 ed = PRVM_EDICT_NUM(i + 1);
2604                                 str = PRVM_GetString(prog, PRVM_serveredictstring(ed, clientstatus));
2605                                 if(str && *str)
2606                                 {
2607                                         char *p;
2608                                         const char *q;
2609                                         p = qcstatus;
2610                                         for(q = str; *q && p != qcstatus + sizeof(qcstatus) - 1; ++q)
2611                                                 if(*q != '\\' && *q != '"' && !ISWHITESPACE(*q))
2612                                                         *p++ = *q;
2613                                         *p = 0;
2614                                 }
2615
2616                                 if (IS_NEXUIZ_DERIVED(gamemode) && (teamplay.integer > 0))
2617                                 {
2618                                         if(cl->frags == -666) // spectator
2619                                                 strlcpy(teambuf, " 0", sizeof(teambuf));
2620                                         else if(cl->colors == 0x44) // red team
2621                                                 strlcpy(teambuf, " 1", sizeof(teambuf));
2622                                         else if(cl->colors == 0xDD) // blue team
2623                                                 strlcpy(teambuf, " 2", sizeof(teambuf));
2624                                         else if(cl->colors == 0xCC) // yellow team
2625                                                 strlcpy(teambuf, " 3", sizeof(teambuf));
2626                                         else if(cl->colors == 0x99) // pink team
2627                                                 strlcpy(teambuf, " 4", sizeof(teambuf));
2628                                         else
2629                                                 strlcpy(teambuf, " 0", sizeof(teambuf));
2630                                 }
2631                                 else
2632                                         *teambuf = 0;
2633
2634                                 // note: team number is inserted according to SoF2 protocol
2635                                 if(*qcstatus)
2636                                         length = dpsnprintf(ptr, left, "%s %d%s \"%s\"\n",
2637                                                                                 qcstatus,
2638                                                                                 pingvalue,
2639                                                                                 teambuf,
2640                                                                                 cleanname);
2641                                 else
2642                                         length = dpsnprintf(ptr, left, "%d %d%s \"%s\"\n",
2643                                                                                 cl->frags,
2644                                                                                 pingvalue,
2645                                                                                 teambuf,
2646                                                                                 cleanname);
2647
2648                                 if(length < 0)
2649                                 {
2650                                         // out of space?
2651                                         // turn it into an infoResponse!
2652                                         out_msg[savelength] = 0;
2653                                         memcpy(out_msg + 4, "infoResponse\x0A", 13);
2654                                         memmove(out_msg + 17, out_msg + 19, savelength - 19);
2655                                         break;
2656                                 }
2657                                 left -= length;
2658                                 ptr += length;
2659                         }
2660                 }
2661         }
2662
2663         return true;
2664
2665 bad:
2666         return false;
2667 }
2668
2669 static qboolean NetConn_PreventFlood(lhnetaddress_t *peeraddress, server_floodaddress_t *floodlist, size_t floodlength, double floodtime, qboolean renew)
2670 {
2671         size_t floodslotnum, bestfloodslotnum;
2672         double bestfloodtime;
2673         lhnetaddress_t noportpeeraddress;
2674         // see if this is a connect flood
2675         noportpeeraddress = *peeraddress;
2676         LHNETADDRESS_SetPort(&noportpeeraddress, 0);
2677         bestfloodslotnum = 0;
2678         bestfloodtime = floodlist[bestfloodslotnum].lasttime;
2679         for (floodslotnum = 0;floodslotnum < floodlength;floodslotnum++)
2680         {
2681                 if (bestfloodtime >= floodlist[floodslotnum].lasttime)
2682                 {
2683                         bestfloodtime = floodlist[floodslotnum].lasttime;
2684                         bestfloodslotnum = floodslotnum;
2685                 }
2686                 if (floodlist[floodslotnum].lasttime && LHNETADDRESS_Compare(&noportpeeraddress, &floodlist[floodslotnum].address) == 0)
2687                 {
2688                         // this address matches an ongoing flood address
2689                         if (realtime < floodlist[floodslotnum].lasttime + floodtime)
2690                         {
2691                                 if(renew)
2692                                 {
2693                                         // renew the ban on this address so it does not expire
2694                                         // until the flood has subsided
2695                                         floodlist[floodslotnum].lasttime = realtime;
2696                                 }
2697                                 //Con_Printf("Flood detected!\n");
2698                                 return true;
2699                         }
2700                         // the flood appears to have subsided, so allow this
2701                         bestfloodslotnum = floodslotnum; // reuse the same slot
2702                         break;
2703                 }
2704         }
2705         // begin a new timeout on this address
2706         floodlist[bestfloodslotnum].address = noportpeeraddress;
2707         floodlist[bestfloodslotnum].lasttime = realtime;
2708         //Con_Printf("Flood detection initiated!\n");
2709         return false;
2710 }
2711
2712 void NetConn_ClearFlood(lhnetaddress_t *peeraddress, server_floodaddress_t *floodlist, size_t floodlength)
2713 {
2714         size_t floodslotnum;
2715         lhnetaddress_t noportpeeraddress;
2716         // see if this is a connect flood
2717         noportpeeraddress = *peeraddress;
2718         LHNETADDRESS_SetPort(&noportpeeraddress, 0);
2719         for (floodslotnum = 0;floodslotnum < floodlength;floodslotnum++)
2720         {
2721                 if (floodlist[floodslotnum].lasttime && LHNETADDRESS_Compare(&noportpeeraddress, &floodlist[floodslotnum].address) == 0)
2722                 {
2723                         // this address matches an ongoing flood address
2724                         // remove the ban
2725                         floodlist[floodslotnum].address.addresstype = LHNETADDRESSTYPE_NONE;
2726                         floodlist[floodslotnum].lasttime = 0;
2727                         //Con_Printf("Flood cleared!\n");
2728                 }
2729         }
2730 }
2731
2732 typedef qboolean (*rcon_matchfunc_t) (lhnetaddress_t *peeraddress, const char *password, const char *hash, const char *s, int slen);
2733
2734 static qboolean hmac_mdfour_time_matching(lhnetaddress_t *peeraddress, const char *password, const char *hash, const char *s, int slen)
2735 {
2736         char mdfourbuf[16];
2737         long t1, t2;
2738
2739         t1 = (long) time(NULL);
2740         t2 = strtol(s, NULL, 0);
2741         if(abs(t1 - t2) > rcon_secure_maxdiff.integer)
2742                 return false;
2743
2744         if(!HMAC_MDFOUR_16BYTES((unsigned char *) mdfourbuf, (unsigned char *) s, slen, (unsigned char *) password, (int)strlen(password)))
2745                 return false;
2746
2747         return !memcmp(mdfourbuf, hash, 16);
2748 }
2749
2750 static qboolean hmac_mdfour_challenge_matching(lhnetaddress_t *peeraddress, const char *password, const char *hash, const char *s, int slen)
2751 {
2752         char mdfourbuf[16];
2753         int i;
2754
2755         if(slen < (int)(sizeof(challenge[0].string)) - 1)
2756                 return false;
2757
2758         // validate the challenge
2759         for (i = 0;i < MAX_CHALLENGES;i++)
2760                 if(challenge[i].time > 0)
2761                         if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address) && !strncmp(challenge[i].string, s, sizeof(challenge[0].string) - 1))
2762                                 break;
2763         // if the challenge is not recognized, drop the packet
2764         if (i == MAX_CHALLENGES)
2765                 return false;
2766
2767         if(!HMAC_MDFOUR_16BYTES((unsigned char *) mdfourbuf, (unsigned char *) s, slen, (unsigned char *) password, (int)strlen(password)))
2768                 return false;
2769
2770         if(memcmp(mdfourbuf, hash, 16))
2771                 return false;
2772
2773         // unmark challenge to prevent replay attacks
2774         challenge[i].time = 0;
2775
2776         return true;
2777 }
2778
2779 static qboolean plaintext_matching(lhnetaddress_t *peeraddress, const char *password, const char *hash, const char *s, int slen)
2780 {
2781         return !strcmp(password, hash);
2782 }
2783
2784 /// returns a string describing the user level, or NULL for auth failure
2785 static 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)
2786 {
2787         const char *text, *userpass_start, *userpass_end, *userpass_startpass;
2788         static char buf[MAX_INPUTLINE];
2789         qboolean hasquotes;
2790         qboolean restricted = false;
2791         qboolean have_usernames = false;
2792         static char vabuf[1024];
2793
2794         userpass_start = rcon_password.string;
2795         while((userpass_end = strchr(userpass_start, ' ')))
2796         {
2797                 have_usernames = true;
2798                 strlcpy(buf, userpass_start, ((size_t)(userpass_end-userpass_start) >= sizeof(buf)) ? (int)(sizeof(buf)) : (int)(userpass_end-userpass_start+1));
2799                 if(buf[0])
2800                         if(comparator(peeraddress, buf, password, cs, cslen))
2801                                 goto allow;
2802                 userpass_start = userpass_end + 1;
2803         }
2804         if(userpass_start[0])
2805         {
2806                 userpass_end = userpass_start + strlen(userpass_start);
2807                 if(comparator(peeraddress, userpass_start, password, cs, cslen))
2808                         goto allow;
2809         }
2810
2811         restricted = true;
2812         have_usernames = false;
2813         userpass_start = rcon_restricted_password.string;
2814         while((userpass_end = strchr(userpass_start, ' ')))
2815         {
2816                 have_usernames = true;
2817                 strlcpy(buf, userpass_start, ((size_t)(userpass_end-userpass_start) >= sizeof(buf)) ? (int)(sizeof(buf)) : (int)(userpass_end-userpass_start+1));
2818                 if(buf[0])
2819                         if(comparator(peeraddress, buf, password, cs, cslen))
2820                                 goto check;
2821                 userpass_start = userpass_end + 1;
2822         }
2823         if(userpass_start[0])
2824         {
2825                 userpass_end = userpass_start + strlen(userpass_start);
2826                 if(comparator(peeraddress, userpass_start, password, cs, cslen))
2827                         goto check;
2828         }
2829
2830         return NULL; // DENIED
2831
2832 check:
2833         for(text = s; text != endpos; ++text)
2834                 if((signed char) *text > 0 && ((signed char) *text < (signed char) ' ' || *text == ';'))
2835                         return NULL; // block possible exploits against the parser/alias expansion
2836
2837         while(s != endpos)
2838         {
2839                 size_t l = strlen(s);
2840                 if(l)
2841                 {
2842                         hasquotes = (strchr(s, '"') != NULL);
2843                         // sorry, we can't allow these substrings in wildcard expressions,
2844                         // as they can mess with the argument counts
2845                         text = rcon_restricted_commands.string;
2846                         while(COM_ParseToken_Console(&text))
2847                         {
2848                                 // com_token now contains a pattern to check for...
2849                                 if(strchr(com_token, '*') || strchr(com_token, '?')) // wildcard expression, * can only match a SINGLE argument
2850                                 {
2851                                         if(!hasquotes)
2852                                                 if(matchpattern_with_separator(s, com_token, true, " ", true)) // note how we excluded tab, newline etc. above
2853                                                         goto match;
2854                                 }
2855                                 else if(strchr(com_token, ' ')) // multi-arg expression? must match in whole
2856                                 {
2857                                         if(!strcmp(com_token, s))
2858                                                 goto match;
2859                                 }
2860                                 else // single-arg expression? must match the beginning of the command
2861                                 {
2862                                         if(!strcmp(com_token, s))
2863                                                 goto match;
2864                                         if(!memcmp(va(vabuf, sizeof(vabuf), "%s ", com_token), s, strlen(com_token) + 1))
2865                                                 goto match;
2866                                 }
2867                         }
2868                         // if we got here, nothing matched!
2869                         return NULL;
2870                 }
2871 match:
2872                 s += l + 1;
2873         }
2874
2875 allow:
2876         userpass_startpass = strchr(userpass_start, ':');
2877         if(have_usernames && userpass_startpass && userpass_startpass < userpass_end)
2878                 return va(vabuf, sizeof(vabuf), "%srcon (username %.*s)", restricted ? "restricted " : "", (int)(userpass_startpass-userpass_start), userpass_start);
2879
2880         return va(vabuf, sizeof(vabuf), "%srcon", restricted ? "restricted " : "");
2881 }
2882
2883 static void RCon_Execute(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress, const char *addressstring2, const char *userlevel, const char *s, const char *endpos, qboolean proquakeprotocol)
2884 {
2885         if(userlevel)
2886         {
2887                 // looks like a legitimate rcon command with the correct password
2888                 const char *s_ptr = s;
2889                 Con_Printf("server received %s command from %s: ", userlevel, host_client ? host_client->name : addressstring2);
2890                 while(s_ptr != endpos)
2891                 {
2892                         size_t l = strlen(s_ptr);
2893                         if(l)
2894                                 Con_Printf(" %s;", s_ptr);
2895                         s_ptr += l + 1;
2896                 }
2897                 Con_Printf("\n");
2898
2899                 if (!host_client || !host_client->netconnection || LHNETADDRESS_GetAddressType(&host_client->netconnection->peeraddress) != LHNETADDRESSTYPE_LOOP)
2900                         Con_Rcon_Redirect_Init(mysocket, peeraddress, proquakeprotocol);
2901                 while(s != endpos)
2902                 {
2903                         size_t l = strlen(s);
2904                         if(l)
2905                         {
2906                                 client_t *host_client_save = host_client;
2907                                 Cmd_ExecuteString(s, src_command, true);
2908                                 host_client = host_client_save;
2909                                 // in case it is a command that changes host_client (like restart)
2910                         }
2911                         s += l + 1;
2912                 }
2913                 Con_Rcon_Redirect_End();
2914         }
2915         else
2916         {
2917                 Con_Printf("server denied rcon access to %s\n", host_client ? host_client->name : addressstring2);
2918         }
2919 }
2920
2921 static int NetConn_ServerParsePacket(lhnetsocket_t *mysocket, unsigned char *data, int length, lhnetaddress_t *peeraddress)
2922 {
2923         int i, ret, clientnum, best;
2924         double besttime;
2925         client_t *client;
2926         char *s, *string, response[1400], addressstring2[128];
2927         static char stringbuf[16384]; // server only
2928         qboolean islocal = (LHNETADDRESS_GetAddressType(peeraddress) == LHNETADDRESSTYPE_LOOP);
2929         char senddata[NET_HEADERSIZE+NET_MAXMESSAGE+CRYPTO_HEADERSIZE];
2930         size_t sendlength, response_len;
2931         char infostringvalue[MAX_INPUTLINE];
2932         char vabuf[1024];
2933
2934         if (!sv.active)
2935                 return false;
2936
2937         // convert the address to a string incase we need it
2938         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
2939
2940         // see if we can identify the sender as a local player
2941         // (this is necessary for rcon to send a reliable reply if the client is
2942         //  actually on the server, not sending remotely)
2943         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
2944                 if (host_client->netconnection && host_client->netconnection->mysocket == mysocket && !LHNETADDRESS_Compare(&host_client->netconnection->peeraddress, peeraddress))
2945                         break;
2946         if (i == svs.maxclients)
2947                 host_client = NULL;
2948
2949         if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
2950         {
2951                 // received a command string - strip off the packaging and put it
2952                 // into our string buffer with NULL termination
2953                 data += 4;
2954                 length -= 4;
2955                 length = min(length, (int)sizeof(stringbuf) - 1);
2956                 memcpy(stringbuf, data, length);
2957                 stringbuf[length] = 0;
2958                 string = stringbuf;
2959
2960                 if (developer_extra.integer)
2961                 {
2962                         Con_Printf("NetConn_ServerParsePacket: %s sent us a command:\n", addressstring2);
2963                         Com_HexDumpToConsole(data, length);
2964                 }
2965
2966                 sendlength = sizeof(senddata) - 4;
2967                 switch(Crypto_ServerParsePacket(string, length, senddata+4, &sendlength, peeraddress))
2968                 {
2969                         case CRYPTO_NOMATCH:
2970                                 // nothing to do
2971                                 break;
2972                         case CRYPTO_MATCH:
2973                                 if(sendlength)
2974                                 {
2975                                         memcpy(senddata, "\377\377\377\377", 4);
2976                                         NetConn_Write(mysocket, senddata, (int)sendlength+4, peeraddress);
2977                                 }
2978                                 break;
2979                         case CRYPTO_DISCARD:
2980                                 if(sendlength)
2981                                 {
2982                                         memcpy(senddata, "\377\377\377\377", 4);
2983                                         NetConn_Write(mysocket, senddata, (int)sendlength+4, peeraddress);
2984                                 }
2985                                 return true;
2986                                 break;
2987                         case CRYPTO_REPLACE:
2988                                 string = senddata+4;
2989                                 length = (int)sendlength;
2990                                 break;
2991                 }
2992
2993                 if (length >= 12 && !memcmp(string, "getchallenge", 12) && (islocal || sv_public.integer > -3))
2994                 {
2995                         for (i = 0, best = 0, besttime = realtime;i < MAX_CHALLENGES;i++)
2996                         {
2997                                 if(challenge[i].time > 0)
2998                                         if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address))
2999                                                 break;
3000                                 if (besttime > challenge[i].time)
3001                                         besttime = challenge[best = i].time;
3002                         }
3003                         // if we did not find an exact match, choose the oldest and
3004                         // update address and string
3005                         if (i == MAX_CHALLENGES)
3006                         {
3007                                 i = best;
3008                                 challenge[i].address = *peeraddress;
3009                                 NetConn_BuildChallengeString(challenge[i].string, sizeof(challenge[i].string));
3010                         }
3011                         else
3012                         {
3013                                 // flood control: drop if requesting challenge too often
3014                                 if(challenge[i].time > realtime - net_challengefloodblockingtimeout.value)
3015                                         return true;
3016                         }
3017                         challenge[i].time = realtime;
3018                         // send the challenge
3019                         dpsnprintf(response, sizeof(response), "\377\377\377\377challenge %s", challenge[i].string);
3020                         response_len = strlen(response) + 1;
3021                         Crypto_ServerAppendToChallenge(string, length, response, &response_len, sizeof(response));
3022                         NetConn_Write(mysocket, response, (int)response_len, peeraddress);
3023                         return true;
3024                 }
3025                 if (length > 8 && !memcmp(string, "connect\\", 8))
3026                 {
3027                         crypto_t *crypto = Crypto_ServerGetInstance(peeraddress);
3028                         string += 7;
3029                         length -= 7;
3030
3031                         if(crypto && crypto->authenticated)
3032                         {
3033                                 // no need to check challenge
3034                                 if(crypto_developer.integer)
3035                                 {
3036                                         Con_Printf("%s connection to %s is being established: client is %s@%s%.*s, I am %.*s@%s%.*s\n",
3037                                                         crypto->use_aes ? "Encrypted" : "Authenticated",
3038                                                         addressstring2,
3039                                                         crypto->client_idfp[0] ? crypto->client_idfp : "-",
3040                                                         (crypto->client_issigned || !crypto->client_keyfp[0]) ? "" : "~",
3041                                                         crypto_keyfp_recommended_length, crypto->client_keyfp[0] ? crypto->client_keyfp : "-",
3042                                                         crypto_keyfp_recommended_length, crypto->server_idfp[0] ? crypto->server_idfp : "-",
3043                                                         (crypto->server_issigned || !crypto->server_keyfp[0]) ? "" : "~",
3044                                                         crypto_keyfp_recommended_length, crypto->server_keyfp[0] ? crypto->server_keyfp : "-"
3045                                                   );
3046                                 }
3047                         }
3048                         else
3049                         {
3050                                 if ((s = InfoString_GetValue(string, "challenge", infostringvalue, sizeof(infostringvalue))))
3051                                 {
3052                                         // validate the challenge
3053                                         for (i = 0;i < MAX_CHALLENGES;i++)
3054                                                 if(challenge[i].time > 0)
3055                                                         if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address) && !strcmp(challenge[i].string, s))
3056                                                                 break;
3057                                         // if the challenge is not recognized, drop the packet
3058                                         if (i == MAX_CHALLENGES)
3059                                                 return true;
3060                                 }
3061                         }
3062
3063                         if((s = InfoString_GetValue(string, "message", infostringvalue, sizeof(infostringvalue))))
3064                                 Con_DPrintf("Connecting client %s sent us the message: %s\n", addressstring2, s);
3065
3066                         if(!(islocal || sv_public.integer > -2))
3067                         {
3068                                 if (developer_extra.integer)
3069                                         Con_Printf("Datagram_ParseConnectionless: sending \"reject %s\" to %s.\n", sv_public_rejectreason.string, addressstring2);
3070                                 NetConn_WriteString(mysocket, va(vabuf, sizeof(vabuf), "\377\377\377\377reject %s", sv_public_rejectreason.string), peeraddress);
3071                                 return true;
3072                         }
3073
3074                         // check engine protocol
3075                         if(!(s = InfoString_GetValue(string, "protocol", infostringvalue, sizeof(infostringvalue))) || strcmp(s, "darkplaces 3"))
3076                         {
3077                                 if (developer_extra.integer)
3078                                         Con_Printf("Datagram_ParseConnectionless: sending \"reject Wrong game protocol.\" to %s.\n", addressstring2);
3079                                 NetConn_WriteString(mysocket, "\377\377\377\377reject Wrong game protocol.", peeraddress);
3080                                 return true;
3081                         }
3082
3083                         // see if this is a duplicate connection request or a disconnected
3084                         // client who is rejoining to the same client slot
3085                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
3086                         {
3087                                 if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
3088                                 {
3089                                         // this is a known client...
3090                                         if(crypto && crypto->authenticated)
3091                                         {
3092                                                 // reject if changing key!
3093                                                 if(client->netconnection->crypto.authenticated)
3094                                                 {
3095                                                         if(
3096                                                                         strcmp(client->netconnection->crypto.client_idfp, crypto->client_idfp)
3097                                                                         ||
3098                                                                         strcmp(client->netconnection->crypto.server_idfp, crypto->server_idfp)
3099                                                                         ||
3100                                                                         strcmp(client->netconnection->crypto.client_keyfp, crypto->client_keyfp)
3101                                                                         ||
3102                                                                         strcmp(client->netconnection->crypto.server_keyfp, crypto->server_keyfp)
3103                                                           )
3104                                                         {
3105                                                                 if (developer_extra.integer)
3106                                                                         Con_Printf("Datagram_ParseConnectionless: sending \"reject Attempt to change key of crypto.\" to %s.\n", addressstring2);
3107                                                                 NetConn_WriteString(mysocket, "\377\377\377\377reject Attempt to change key of crypto.", peeraddress);
3108                                                                 return true;
3109                                                         }
3110                                                 }
3111                                         }
3112                                         else
3113                                         {
3114                                                 // reject if downgrading!
3115                                                 if(client->netconnection->crypto.authenticated)
3116                                                 {
3117                                                         if (developer_extra.integer)
3118                                                                 Con_Printf("Datagram_ParseConnectionless: sending \"reject Attempt to downgrade crypto.\" to %s.\n", addressstring2);
3119                                                         NetConn_WriteString(mysocket, "\377\377\377\377reject Attempt to downgrade crypto.", peeraddress);
3120                                                         return true;
3121                                                 }
3122                                         }
3123                                         if (client->begun)
3124                                         {
3125                                                 // client crashed and is coming back,
3126                                                 // keep their stuff intact
3127                                                 if (developer_extra.integer)
3128                                                         Con_Printf("Datagram_ParseConnectionless: sending \"accept\" to %s.\n", addressstring2);
3129                                                 NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
3130                                                 if(crypto && crypto->authenticated)
3131                                                         Crypto_FinishInstance(&client->netconnection->crypto, crypto);
3132                                                 SV_SendServerinfo(client);
3133                                         }
3134                                         else
3135                                         {
3136                                                 // client is still trying to connect,
3137                                                 // so we send a duplicate reply
3138                                                 if (developer_extra.integer)
3139                                                         Con_Printf("Datagram_ParseConnectionless: sending duplicate accept to %s.\n", addressstring2);
3140                                                 if(crypto && crypto->authenticated)
3141                                                         Crypto_FinishInstance(&client->netconnection->crypto, crypto);
3142                                                 NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
3143                                         }
3144                                         return true;
3145                                 }
3146                         }
3147
3148                         if (NetConn_PreventFlood(peeraddress, sv.connectfloodaddresses, sizeof(sv.connectfloodaddresses) / sizeof(sv.connectfloodaddresses[0]), net_connectfloodblockingtimeout.value, true))
3149                                 return true;
3150
3151                         // find an empty client slot for this new client
3152                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
3153                         {
3154                                 netconn_t *conn;
3155                                 if (!client->active && (conn = NetConn_Open(mysocket, peeraddress)))
3156                                 {
3157                                         // allocated connection
3158                                         if (developer_extra.integer)
3159                                                 Con_Printf("Datagram_ParseConnectionless: sending \"accept\" to %s.\n", conn->address);
3160                                         NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
3161                                         // now set up the client
3162                                         if(crypto && crypto->authenticated)
3163                                                 Crypto_FinishInstance(&conn->crypto, crypto);
3164                                         SV_ConnectClient(clientnum, conn);
3165                                         NetConn_Heartbeat(1);
3166                                         return true;
3167                                 }
3168                         }
3169
3170                         // no empty slots found - server is full
3171                         if (developer_extra.integer)
3172                                 Con_Printf("Datagram_ParseConnectionless: sending \"reject Server is full.\" to %s.\n", addressstring2);
3173                         NetConn_WriteString(mysocket, "\377\377\377\377reject Server is full.", peeraddress);
3174
3175                         return true;
3176                 }
3177                 if (length >= 7 && !memcmp(string, "getinfo", 7) && (islocal || sv_public.integer > -1))
3178                 {
3179                         const char *challenge = NULL;
3180
3181                         if (NetConn_PreventFlood(peeraddress, sv.getstatusfloodaddresses, sizeof(sv.getstatusfloodaddresses) / sizeof(sv.getstatusfloodaddresses[0]), net_getstatusfloodblockingtimeout.value, false))
3182                                 return true;
3183
3184                         // If there was a challenge in the getinfo message
3185                         if (length > 8 && string[7] == ' ')
3186                                 challenge = string + 8;
3187
3188                         if (NetConn_BuildStatusResponse(challenge, response, sizeof(response), false))
3189                         {
3190                                 if (developer_extra.integer)
3191                                         Con_DPrintf("Sending reply to master %s - %s\n", addressstring2, response);
3192                                 NetConn_WriteString(mysocket, response, peeraddress);
3193                         }
3194                         return true;
3195                 }
3196                 if (length >= 9 && !memcmp(string, "getstatus", 9) && (islocal || sv_public.integer > -1))
3197                 {
3198                         const char *challenge = NULL;
3199
3200                         if (NetConn_PreventFlood(peeraddress, sv.getstatusfloodaddresses, sizeof(sv.getstatusfloodaddresses) / sizeof(sv.getstatusfloodaddresses[0]), net_getstatusfloodblockingtimeout.value, false))
3201                                 return true;
3202
3203                         // If there was a challenge in the getinfo message
3204                         if (length > 10 && string[9] == ' ')
3205                                 challenge = string + 10;
3206
3207                         if (NetConn_BuildStatusResponse(challenge, response, sizeof(response), true))
3208                         {
3209                                 if (developer_extra.integer)
3210                                         Con_DPrintf("Sending reply to client %s - %s\n", addressstring2, response);
3211                                 NetConn_WriteString(mysocket, response, peeraddress);
3212                         }
3213                         return true;
3214                 }
3215                 if (length >= 37 && !memcmp(string, "srcon HMAC-MD4 TIME ", 20))
3216                 {
3217                         char *password = string + 20;
3218                         char *timeval = string + 37;
3219                         char *s = strchr(timeval, ' ');
3220                         char *endpos = string + length + 1; // one behind the NUL, so adding strlen+1 will eventually reach it
3221                         const char *userlevel;
3222
3223                         if(rcon_secure.integer > 1)
3224                                 return true;
3225
3226                         if(!s)
3227                                 return true; // invalid packet
3228                         ++s;
3229
3230                         userlevel = RCon_Authenticate(peeraddress, password, s, endpos, hmac_mdfour_time_matching, timeval, endpos - timeval - 1); // not including the appended \0 into the HMAC
3231                         RCon_Execute(mysocket, peeraddress, addressstring2, userlevel, s, endpos, false);
3232                         return true;
3233                 }
3234                 if (length >= 42 && !memcmp(string, "srcon HMAC-MD4 CHALLENGE ", 25))
3235                 {
3236                         char *password = string + 25;
3237                         char *challenge = string + 42;
3238                         char *s = strchr(challenge, ' ');
3239                         char *endpos = string + length + 1; // one behind the NUL, so adding strlen+1 will eventually reach it
3240                         const char *userlevel;
3241                         if(!s)
3242                                 return true; // invalid packet
3243                         ++s;
3244
3245                         userlevel = RCon_Authenticate(peeraddress, password, s, endpos, hmac_mdfour_challenge_matching, challenge, endpos - challenge - 1); // not including the appended \0 into the HMAC
3246                         RCon_Execute(mysocket, peeraddress, addressstring2, userlevel, s, endpos, false);
3247                         return true;
3248                 }
3249                 if (length >= 5 && !memcmp(string, "rcon ", 5))
3250                 {
3251                         int i;
3252                         char *s = string + 5;
3253                         char *endpos = string + length + 1; // one behind the NUL, so adding strlen+1 will eventually reach it
3254                         char password[64];
3255
3256                         if(rcon_secure.integer > 0)
3257                                 return true;
3258
3259                         for (i = 0;!ISWHITESPACE(*s);s++)
3260                                 if (i < (int)sizeof(password) - 1)
3261                                         password[i++] = *s;
3262                         if(ISWHITESPACE(*s) && s != endpos) // skip leading ugly space
3263                                 ++s;
3264                         password[i] = 0;
3265                         if (!ISWHITESPACE(password[0]))
3266                         {
3267                                 const char *userlevel = RCon_Authenticate(peeraddress, password, s, endpos, plaintext_matching, NULL, 0);
3268                                 RCon_Execute(mysocket, peeraddress, addressstring2, userlevel, s, endpos, false);
3269                         }
3270                         return true;
3271                 }
3272                 if (!strncmp(string, "extResponse ", 12))
3273                 {
3274                         ++sv_net_extresponse_count;
3275                         if(sv_net_extresponse_count > NET_EXTRESPONSE_MAX)
3276                                 sv_net_extresponse_count = NET_EXTRESPONSE_MAX;
3277                         sv_net_extresponse_last = (sv_net_extresponse_last + 1) % NET_EXTRESPONSE_MAX;
3278                         dpsnprintf(sv_net_extresponse[sv_net_extresponse_last], sizeof(sv_net_extresponse[sv_net_extresponse_last]), "'%s' %s", addressstring2, string + 12);
3279                         return true;
3280                 }
3281                 if (!strncmp(string, "ping", 4))
3282                 {
3283                         if (developer_extra.integer)
3284                                 Con_DPrintf("Received ping from %s, sending ack\n", addressstring2);
3285                         NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
3286                         return true;
3287                 }
3288                 if (!strncmp(string, "ack", 3))
3289                         return true;
3290                 // we may not have liked the packet, but it was a command packet, so
3291                 // we're done processing this packet now
3292                 return true;
3293         }
3294         // netquake control packets, supported for compatibility only, and only
3295         // when running game protocols that are normally served via this connection
3296         // protocol
3297         // (this protects more modern protocols against being used for
3298         //  Quake packet flood Denial Of Service attacks)
3299         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)
3300         {
3301                 int c;
3302                 int protocolnumber;
3303                 const char *protocolname;
3304                 data += 4;
3305                 length -= 4;
3306                 SZ_Clear(&sv_message);
3307                 SZ_Write(&sv_message, data, length);
3308                 MSG_BeginReading(&sv_message);
3309                 c = MSG_ReadByte(&sv_message);
3310                 switch (c)
3311                 {
3312                 case CCREQ_CONNECT:
3313                         if (developer_extra.integer)
3314                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREQ_CONNECT from %s.\n", addressstring2);
3315                         if(!(islocal || sv_public.integer > -2))
3316                         {
3317                                 if (developer_extra.integer)
3318                                         Con_DPrintf("Datagram_ParseConnectionless: sending CCREP_REJECT \"%s\" to %s.\n", sv_public_rejectreason.string, addressstring2);
3319                                 SZ_Clear(&sv_message);
3320                                 // save space for the header, filled in later
3321                                 MSG_WriteLong(&sv_message, 0);
3322                                 MSG_WriteByte(&sv_message, CCREP_REJECT);
3323                                 MSG_WriteString(&sv_message, va(vabuf, sizeof(vabuf), "%s\n", sv_public_rejectreason.string));
3324                                 StoreBigLong(sv_message.data, NETFLAG_CTL | (sv_message.cursize & NETFLAG_LENGTH_MASK));
3325                                 NetConn_Write(mysocket, sv_message.data, sv_message.cursize, peeraddress);
3326                                 SZ_Clear(&sv_message);
3327                                 break;
3328                         }
3329
3330                         protocolname = MSG_ReadString(&sv_message, sv_readstring, sizeof(sv_readstring));
3331                         protocolnumber = MSG_ReadByte(&sv_message);
3332                         if (strcmp(protocolname, "QUAKE") || protocolnumber != NET_PROTOCOL_VERSION)
3333                         {
3334                                 if (developer_extra.integer)
3335                                         Con_DPrintf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Incompatible version.\" to %s.\n", addressstring2);
3336                                 SZ_Clear(&sv_message);
3337                                 // save space for the header, filled in later
3338                                 MSG_WriteLong(&sv_message, 0);
3339                                 MSG_WriteByte(&sv_message, CCREP_REJECT);
3340                                 MSG_WriteString(&sv_message, "Incompatible version.\n");
3341                                 StoreBigLong(sv_message.data, NETFLAG_CTL | (sv_message.cursize & NETFLAG_LENGTH_MASK));
3342                                 NetConn_Write(mysocket, sv_message.data, sv_message.cursize, peeraddress);
3343                                 SZ_Clear(&sv_message);
3344                                 break;
3345                         }
3346
3347                         // see if this connect request comes from a known client
3348                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
3349                         {
3350                                 if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
3351                                 {
3352                                         // this is either a duplicate connection request
3353                                         // or coming back from a timeout
3354                                         // (if so, keep their stuff intact)
3355
3356                                         crypto_t *crypto = Crypto_ServerGetInstance(peeraddress);
3357                                         if((crypto && crypto->authenticated) || client->netconnection->crypto.authenticated)
3358                                         {
3359                                                 if (developer_extra.integer)
3360                                                         Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Attempt to downgrade crypto.\" to %s.\n", addressstring2);
3361                                                 SZ_Clear(&sv_message);
3362                                                 // save space for the header, filled in later
3363                                                 MSG_WriteLong(&sv_message, 0);
3364                                                 MSG_WriteByte(&sv_message, CCREP_REJECT);
3365                                                 MSG_WriteString(&sv_message, "Attempt to downgrade crypto.\n");
3366                                                 StoreBigLong(sv_message.data, NETFLAG_CTL | (sv_message.cursize & NETFLAG_LENGTH_MASK));
3367                                                 NetConn_Write(mysocket, sv_message.data, sv_message.cursize, peeraddress);
3368                                                 SZ_Clear(&sv_message);
3369                                                 return true;
3370                                         }
3371
3372                                         // send a reply
3373                                         if (developer_extra.integer)
3374                                                 Con_DPrintf("Datagram_ParseConnectionless: sending duplicate CCREP_ACCEPT to %s.\n", addressstring2);
3375                                         SZ_Clear(&sv_message);
3376                                         // save space for the header, filled in later
3377                                         MSG_WriteLong(&sv_message, 0);
3378                                         MSG_WriteByte(&sv_message, CCREP_ACCEPT);
3379                                         MSG_WriteLong(&sv_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(client->netconnection->mysocket)));
3380                                         StoreBigLong(sv_message.data, NETFLAG_CTL | (sv_message.cursize & NETFLAG_LENGTH_MASK));
3381                                         NetConn_Write(mysocket, sv_message.data, sv_message.cursize, peeraddress);
3382                                         SZ_Clear(&sv_message);
3383
3384                                         // if client is already spawned, re-send the
3385                                         // serverinfo message as they'll need it to play
3386                                         if (client->begun)
3387                                                 SV_SendServerinfo(client);
3388                                         return true;
3389                                 }
3390                         }
3391
3392                         // this is a new client, check for connection flood
3393                         if (NetConn_PreventFlood(peeraddress, sv.connectfloodaddresses, sizeof(sv.connectfloodaddresses) / sizeof(sv.connectfloodaddresses[0]), net_connectfloodblockingtimeout.value, true))
3394                                 break;
3395
3396                         // find a slot for the new client
3397                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
3398                         {
3399                                 netconn_t *conn;
3400                                 if (!client->active && (client->netconnection = conn = NetConn_Open(mysocket, peeraddress)) != NULL)
3401                                 {
3402                                         // connect to the client
3403                                         // everything is allocated, just fill in the details
3404                                         strlcpy (conn->address, addressstring2, sizeof (conn->address));
3405                                         if (developer_extra.integer)
3406                                                 Con_DPrintf("Datagram_ParseConnectionless: sending CCREP_ACCEPT to %s.\n", addressstring2);
3407                                         // send back the info about the server connection
3408                                         SZ_Clear(&sv_message);
3409                                         // save space for the header, filled in later
3410                                         MSG_WriteLong(&sv_message, 0);
3411                                         MSG_WriteByte(&sv_message, CCREP_ACCEPT);
3412                                         MSG_WriteLong(&sv_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(conn->mysocket)));
3413                                         StoreBigLong(sv_message.data, NETFLAG_CTL | (sv_message.cursize & NETFLAG_LENGTH_MASK));
3414                                         NetConn_Write(mysocket, sv_message.data, sv_message.cursize, peeraddress);
3415                                         SZ_Clear(&sv_message);
3416                                         // now set up the client struct
3417                                         SV_ConnectClient(clientnum, conn);
3418                                         NetConn_Heartbeat(1);
3419                                         return true;
3420                                 }
3421                         }
3422
3423                         if (developer_extra.integer)
3424                                 Con_DPrintf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Server is full.\" to %s.\n", addressstring2);
3425                         // no room; try to let player know
3426                         SZ_Clear(&sv_message);
3427                         // save space for the header, filled in later
3428                         MSG_WriteLong(&sv_message, 0);
3429                         MSG_WriteByte(&sv_message, CCREP_REJECT);
3430                         MSG_WriteString(&sv_message, "Server is full.\n");
3431                         StoreBigLong(sv_message.data, NETFLAG_CTL | (sv_message.cursize & NETFLAG_LENGTH_MASK));
3432                         NetConn_Write(mysocket, sv_message.data, sv_message.cursize, peeraddress);
3433                         SZ_Clear(&sv_message);
3434                         break;
3435                 case CCREQ_SERVER_INFO:
3436                         if (developer_extra.integer)
3437                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREQ_SERVER_INFO from %s.\n", addressstring2);
3438                         if(!(islocal || sv_public.integer > -1))
3439                                 break;
3440
3441                         if (NetConn_PreventFlood(peeraddress, sv.getstatusfloodaddresses, sizeof(sv.getstatusfloodaddresses) / sizeof(sv.getstatusfloodaddresses[0]), net_getstatusfloodblockingtimeout.value, false))
3442                                 break;
3443
3444                         if (sv.active && !strcmp(MSG_ReadString(&sv_message, sv_readstring, sizeof(sv_readstring)), "QUAKE"))
3445                         {
3446                                 int numclients;
3447                                 char myaddressstring[128];
3448                                 if (developer_extra.integer)
3449                                         Con_DPrintf("Datagram_ParseConnectionless: sending CCREP_SERVER_INFO to %s.\n", addressstring2);
3450                                 SZ_Clear(&sv_message);
3451                                 // save space for the header, filled in later
3452                                 MSG_WriteLong(&sv_message, 0);
3453                                 MSG_WriteByte(&sv_message, CCREP_SERVER_INFO);
3454                                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), myaddressstring, sizeof(myaddressstring), true);
3455                                 MSG_WriteString(&sv_message, myaddressstring);
3456                                 MSG_WriteString(&sv_message, hostname.string);
3457                                 MSG_WriteString(&sv_message, sv.name);
3458                                 // How many clients are there?
3459                                 for (i = 0, numclients = 0;i < svs.maxclients;i++)
3460                                         if (svs.clients[i].active)
3461                                                 numclients++;
3462                                 MSG_WriteByte(&sv_message, numclients);
3463                                 MSG_WriteByte(&sv_message, svs.maxclients);
3464                                 MSG_WriteByte(&sv_message, NET_PROTOCOL_VERSION);
3465                                 StoreBigLong(sv_message.data, NETFLAG_CTL | (sv_message.cursize & NETFLAG_LENGTH_MASK));
3466                                 NetConn_Write(mysocket, sv_message.data, sv_message.cursize, peeraddress);
3467                                 SZ_Clear(&sv_message);
3468                         }
3469                         break;
3470                 case CCREQ_PLAYER_INFO:
3471                         if (developer_extra.integer)
3472                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREQ_PLAYER_INFO from %s.\n", addressstring2);
3473                         if(!(islocal || sv_public.integer > -1))
3474                                 break;
3475
3476                         if (NetConn_PreventFlood(peeraddress, sv.getstatusfloodaddresses, sizeof(sv.getstatusfloodaddresses) / sizeof(sv.getstatusfloodaddresses[0]), net_getstatusfloodblockingtimeout.value, false))
3477                                 break;
3478
3479                         if (sv.active)
3480                         {
3481                                 int playerNumber, activeNumber, clientNumber;
3482                                 client_t *client;
3483
3484                                 playerNumber = MSG_ReadByte(&sv_message);
3485                                 activeNumber = -1;
3486                                 for (clientNumber = 0, client = svs.clients; clientNumber < svs.maxclients; clientNumber++, client++)
3487                                         if (client->active && ++activeNumber == playerNumber)
3488                                                 break;
3489                                 if (clientNumber != svs.maxclients)
3490                                 {
3491                                         SZ_Clear(&sv_message);
3492                                         // save space for the header, filled in later
3493                                         MSG_WriteLong(&sv_message, 0);
3494                                         MSG_WriteByte(&sv_message, CCREP_PLAYER_INFO);
3495                                         MSG_WriteByte(&sv_message, playerNumber);
3496                                         MSG_WriteString(&sv_message, client->name);
3497                                         MSG_WriteLong(&sv_message, client->colors);
3498                                         MSG_WriteLong(&sv_message, client->frags);
3499                                         MSG_WriteLong(&sv_message, (int)(realtime - client->connecttime));
3500                                         if(sv_status_privacy.integer)
3501                                                 MSG_WriteString(&sv_message, client->netconnection ? "hidden" : "botclient");
3502                                         else
3503                                                 MSG_WriteString(&sv_message, client->netconnection ? client->netconnection->address : "botclient");
3504                                         StoreBigLong(sv_message.data, NETFLAG_CTL | (sv_message.cursize & NETFLAG_LENGTH_MASK));
3505                                         NetConn_Write(mysocket, sv_message.data, sv_message.cursize, peeraddress);
3506                                         SZ_Clear(&sv_message);
3507                                 }
3508                         }
3509                         break;
3510                 case CCREQ_RULE_INFO:
3511                         if (developer_extra.integer)
3512                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREQ_RULE_INFO from %s.\n", addressstring2);
3513                         if(!(islocal || sv_public.integer > -1))
3514                                 break;
3515
3516                         // no flood check here, as it only returns one cvar for one cvar and clients may iterate quickly
3517
3518                         if (sv.active)
3519                         {
3520                                 char *prevCvarName;
3521                                 cvar_t *var;
3522
3523                                 // find the search start location
3524                                 prevCvarName = MSG_ReadString(&sv_message, sv_readstring, sizeof(sv_readstring));
3525                                 var = Cvar_FindVarAfter(prevCvarName, CVAR_NOTIFY);
3526
3527                                 // send the response
3528                                 SZ_Clear(&sv_message);
3529                                 // save space for the header, filled in later
3530                                 MSG_WriteLong(&sv_message, 0);
3531                                 MSG_WriteByte(&sv_message, CCREP_RULE_INFO);
3532                                 if (var)
3533                                 {
3534                                         MSG_WriteString(&sv_message, var->name);
3535                                         MSG_WriteString(&sv_message, var->string);
3536                                 }
3537                                 StoreBigLong(sv_message.data, NETFLAG_CTL | (sv_message.cursize & NETFLAG_LENGTH_MASK));
3538                                 NetConn_Write(mysocket, sv_message.data, sv_message.cursize, peeraddress);
3539                                 SZ_Clear(&sv_message);
3540                         }
3541                         break;
3542                 case CCREQ_RCON:
3543                         if (developer_extra.integer)
3544                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREQ_RCON from %s.\n", addressstring2);
3545                         if (sv.active && !rcon_secure.integer)
3546                         {
3547                                 char password[2048];
3548                                 char cmd[2048];
3549                                 char *s;
3550                                 char *endpos;
3551                                 const char *userlevel;
3552                                 strlcpy(password, MSG_ReadString(&sv_message, sv_readstring, sizeof(sv_readstring)), sizeof(password));
3553                                 strlcpy(cmd, MSG_ReadString(&sv_message, sv_readstring, sizeof(sv_readstring)), sizeof(cmd));
3554                                 s = cmd;
3555                                 endpos = cmd + strlen(cmd) + 1; // one behind the NUL, so adding strlen+1 will eventually reach it
3556                                 userlevel = RCon_Authenticate(peeraddress, password, s, endpos, plaintext_matching, NULL, 0);
3557                                 RCon_Execute(mysocket, peeraddress, addressstring2, userlevel, s, endpos, true);
3558                                 return true;
3559                         }
3560                         break;
3561                 default:
3562                         break;
3563                 }
3564                 SZ_Clear(&sv_message);
3565                 // we may not have liked the packet, but it was a valid control
3566                 // packet, so we're done processing this packet now
3567                 return true;
3568         }
3569         if (host_client)
3570         {
3571                 if ((ret = NetConn_ReceivedMessage(host_client->netconnection, data, length, sv.protocol, host_client->begun ? net_messagetimeout.value : net_connecttimeout.value)) == 2)
3572                 {
3573                         SV_ReadClientMessage();
3574                         return ret;
3575                 }
3576         }
3577         return 0;
3578 }
3579
3580 void NetConn_ServerFrame(void)
3581 {
3582         int i, length;
3583         lhnetaddress_t peeraddress;
3584         unsigned char readbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
3585         for (i = 0;i < sv_numsockets;i++)
3586                 while (sv_sockets[i] && (length = NetConn_Read(sv_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
3587                         NetConn_ServerParsePacket(sv_sockets[i], readbuffer, length, &peeraddress);
3588         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
3589         {
3590                 // never timeout loopback connections
3591                 if (host_client->netconnection && realtime > host_client->netconnection->timeout && LHNETADDRESS_GetAddressType(&host_client->netconnection->peeraddress) != LHNETADDRESSTYPE_LOOP)
3592                 {
3593                         Con_Printf("Client \"%s\" connection timed out\n", host_client->name);
3594                         SV_DropClient(false);
3595                 }
3596         }
3597 }
3598
3599 void NetConn_SleepMicroseconds(int microseconds)
3600 {
3601         LHNET_SleepUntilPacket_Microseconds(microseconds);
3602 }
3603
3604 #ifdef CONFIG_MENU
3605 void NetConn_QueryMasters(qboolean querydp, qboolean queryqw)
3606 {
3607         int i, j;
3608         int masternum;
3609         lhnetaddress_t masteraddress;
3610         lhnetaddress_t broadcastaddress;
3611         char request[256];
3612
3613         if (serverlist_cachecount >= SERVERLIST_TOTALSIZE)
3614                 return;
3615
3616         // 26000 is the default quake server port, servers on other ports will not
3617         // be found
3618         // note this is IPv4-only, I doubt there are IPv6-only LANs out there
3619         LHNETADDRESS_FromString(&broadcastaddress, "255.255.255.255", 26000);
3620
3621         if (querydp)
3622         {
3623                 for (i = 0;i < cl_numsockets;i++)
3624                 {
3625                         if (cl_sockets[i])
3626                         {
3627                                 const char *cmdname, *extraoptions;
3628                                 int af = LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i]));
3629
3630                                 if(LHNETADDRESS_GetAddressType(&broadcastaddress) == af)
3631                                 {
3632                                         // search LAN for Quake servers
3633                                         SZ_Clear(&cl_message);
3634                                         // save space for the header, filled in later
3635                                         MSG_WriteLong(&cl_message, 0);
3636                                         MSG_WriteByte(&cl_message, CCREQ_SERVER_INFO);
3637                                         MSG_WriteString(&cl_message, "QUAKE");
3638                                         MSG_WriteByte(&cl_message, NET_PROTOCOL_VERSION);
3639                                         StoreBigLong(cl_message.data, NETFLAG_CTL | (cl_message.cursize & NETFLAG_LENGTH_MASK));
3640                                         NetConn_Write(cl_sockets[i], cl_message.data, cl_message.cursize, &broadcastaddress);
3641                                         SZ_Clear(&cl_message);
3642
3643                                         // search LAN for DarkPlaces servers
3644                                         NetConn_WriteString(cl_sockets[i], "\377\377\377\377getstatus", &broadcastaddress);
3645                                 }
3646
3647                                 // build the getservers message to send to the dpmaster master servers
3648                                 if (LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])) == LHNETADDRESSTYPE_INET6)
3649                                 {
3650                                         cmdname = "getserversExt";
3651                                         extraoptions = " ipv4 ipv6";  // ask for IPv4 and IPv6 servers
3652                                 }
3653                                 else
3654                                 {
3655                                         cmdname = "getservers";
3656                                         extraoptions = "";
3657                                 }
3658                                 dpsnprintf(request, sizeof(request), "\377\377\377\377%s %s %u empty full%s", cmdname, gamenetworkfiltername, NET_PROTOCOL_VERSION, extraoptions);
3659
3660                                 // search internet
3661                                 for (masternum = 0;sv_masters[masternum].name;masternum++)
3662                                 {
3663                                         if (sv_masters[masternum].string && sv_masters[masternum].string[0] && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, DPMASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == af)
3664                                         {
3665                                                 masterquerycount++;
3666                                                 NetConn_WriteString(cl_sockets[i], request, &masteraddress);
3667                                         }
3668                                 }
3669
3670                                 // search favorite servers
3671                                 for(j = 0; j < nFavorites; ++j)
3672                                 {
3673                                         if(LHNETADDRESS_GetAddressType(&favorites[j]) == af)
3674                                         {
3675                                                 if(LHNETADDRESS_ToString(&favorites[j], request, sizeof(request), true))
3676                                                         NetConn_ClientParsePacket_ServerList_PrepareQuery( PROTOCOL_DARKPLACES7, request, true );
3677                                         }
3678                                 }
3679                         }
3680                 }
3681         }
3682
3683         // only query QuakeWorld servers when the user wants to
3684         if (queryqw)
3685         {
3686                 for (i = 0;i < cl_numsockets;i++)
3687                 {
3688                         if (cl_sockets[i])
3689                         {
3690                                 int af = LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i]));
3691
3692                                 if(LHNETADDRESS_GetAddressType(&broadcastaddress) == af)
3693                                 {
3694                                         // search LAN for QuakeWorld servers
3695                                         NetConn_WriteString(cl_sockets[i], "\377\377\377\377status\n", &broadcastaddress);
3696
3697                                         // build the getservers message to send to the qwmaster master servers
3698                                         // note this has no -1 prefix, and the trailing nul byte is sent
3699                                         dpsnprintf(request, sizeof(request), "c\n");
3700                                 }
3701
3702                                 // search internet
3703                                 for (masternum = 0;sv_qwmasters[masternum].name;masternum++)
3704                                 {
3705                                         if (sv_qwmasters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_qwmasters[masternum].string, QWMASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])))
3706                                         {
3707                                                 if (m_state != m_slist)
3708                                                 {
3709                                                         char lookupstring[128];
3710                                                         LHNETADDRESS_ToString(&masteraddress, lookupstring, sizeof(lookupstring), true);
3711                                                         Con_Printf("Querying master %s (resolved from %s)\n", lookupstring, sv_qwmasters[masternum].string);
3712                                                 }
3713                                                 masterquerycount++;
3714                                                 NetConn_Write(cl_sockets[i], request, (int)strlen(request) + 1, &masteraddress);
3715                                         }
3716                                 }
3717
3718                                 // search favorite servers
3719                                 for(j = 0; j < nFavorites; ++j)
3720                                 {
3721                                         if(LHNETADDRESS_GetAddressType(&favorites[j]) == af)
3722                                         {
3723                                                 if(LHNETADDRESS_ToString(&favorites[j], request, sizeof(request), true))
3724                                                 {
3725                                                         NetConn_WriteString(cl_sockets[i], "\377\377\377\377status\n", &favorites[j]);
3726                                                         NetConn_ClientParsePacket_ServerList_PrepareQuery( PROTOCOL_QUAKEWORLD, request, true );
3727                                                 }
3728                                         }
3729                                 }
3730                         }
3731                 }
3732         }
3733         if (!masterquerycount)
3734         {
3735                 Con_Print("Unable to query master servers, no suitable network sockets active.\n");
3736                 M_Update_Return_Reason("No network");
3737         }
3738 }
3739 #endif
3740
3741 void NetConn_Heartbeat(int priority)
3742 {
3743         lhnetaddress_t masteraddress;
3744         int masternum;
3745         lhnetsocket_t *mysocket;
3746
3747         // if it's a state change (client connected), limit next heartbeat to no
3748         // more than 30 sec in the future
3749         if (priority == 1 && nextheartbeattime > realtime + 30.0)
3750                 nextheartbeattime = realtime + 30.0;
3751
3752         // limit heartbeatperiod to 30 to 270 second range,
3753         // lower limit is to avoid abusing master servers with excess traffic,
3754         // upper limit is to avoid timing out on the master server (which uses
3755         // 300 sec timeout)
3756         if (sv_heartbeatperiod.value < 30)
3757                 Cvar_SetValueQuick(&sv_heartbeatperiod, 30);
3758         if (sv_heartbeatperiod.value > 270)
3759                 Cvar_SetValueQuick(&sv_heartbeatperiod, 270);
3760
3761         // make advertising optional and don't advertise singleplayer games, and
3762         // only send a heartbeat as often as the admin wants
3763         if (sv.active && sv_public.integer > 0 && svs.maxclients >= 2 && (priority > 1 || realtime > nextheartbeattime))
3764         {
3765                 nextheartbeattime = realtime + sv_heartbeatperiod.value;
3766                 for (masternum = 0;sv_masters[masternum].name;masternum++)
3767                         if (sv_masters[masternum].string && sv_masters[masternum].string[0] && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, DPMASTER_PORT) && (mysocket = NetConn_ChooseServerSocketForAddress(&masteraddress)))
3768                                 NetConn_WriteString(mysocket, "\377\377\377\377heartbeat DarkPlaces\x0A", &masteraddress);
3769         }
3770 }
3771
3772 static void Net_Heartbeat_f(void)
3773 {
3774         if (sv.active)
3775                 NetConn_Heartbeat(2);
3776         else
3777                 Con_Print("No server running, can not heartbeat to master server.\n");
3778 }
3779
3780 static void PrintStats(netconn_t *conn)
3781 {
3782         if ((cls.state == ca_connected && cls.protocol == PROTOCOL_QUAKEWORLD) || (sv.active && sv.protocol == PROTOCOL_QUAKEWORLD))
3783                 Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, !conn->sendMessageLength, conn->outgoing_unreliable_sequence, conn->qw.incoming_sequence);
3784         else
3785                 Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, !conn->sendMessageLength, conn->nq.sendSequence, conn->nq.receiveSequence);
3786         Con_Printf("unreliable messages sent   = %i\n", conn->unreliableMessagesSent);
3787         Con_Printf("unreliable messages recv   = %i\n", conn->unreliableMessagesReceived);
3788         Con_Printf("reliable messages sent     = %i\n", conn->reliableMessagesSent);
3789         Con_Printf("reliable messages received = %i\n", conn->reliableMessagesReceived);
3790         Con_Printf("packetsSent                = %i\n", conn->packetsSent);
3791         Con_Printf("packetsReSent              = %i\n", conn->packetsReSent);
3792         Con_Printf("packetsReceived            = %i\n", conn->packetsReceived);
3793         Con_Printf("receivedDuplicateCount     = %i\n", conn->receivedDuplicateCount);
3794         Con_Printf("droppedDatagrams           = %i\n", conn->droppedDatagrams);
3795 }
3796
3797 void Net_Stats_f(void)
3798 {
3799         netconn_t *conn;
3800         Con_Print("connections                =\n");
3801         for (conn = netconn_list;conn;conn = conn->next)
3802                 PrintStats(conn);
3803 }
3804
3805 #ifdef CONFIG_MENU
3806 void Net_Refresh_f(void)
3807 {
3808         if (m_state != m_slist) {
3809                 Con_Print("Sending new requests to master servers\n");
3810                 ServerList_QueryList(false, true, false, true);
3811                 Con_Print("Listening for replies...\n");
3812         } else
3813                 ServerList_QueryList(false, true, false, false);
3814 }
3815
3816 void Net_Slist_f(void)
3817 {
3818         ServerList_ResetMasks();
3819         serverlist_sortbyfield = SLIF_PING;
3820         serverlist_sortflags = 0;
3821     if (m_state != m_slist) {
3822                 Con_Print("Sending requests to master servers\n");
3823                 ServerList_QueryList(true, true, false, true);
3824                 Con_Print("Listening for replies...\n");
3825         } else
3826                 ServerList_QueryList(true, true, false, false);
3827 }
3828
3829 void Net_SlistQW_f(void)
3830 {
3831         ServerList_ResetMasks();
3832         serverlist_sortbyfield = SLIF_PING;
3833         serverlist_sortflags = 0;
3834     if (m_state != m_slist) {
3835                 Con_Print("Sending requests to master servers\n");
3836                 ServerList_QueryList(true, false, true, true);
3837                 serverlist_consoleoutput = true;
3838                 Con_Print("Listening for replies...\n");
3839         } else
3840                 ServerList_QueryList(true, false, true, false);
3841 }
3842 #endif
3843
3844 void NetConn_Init(void)
3845 {
3846         int i;
3847         lhnetaddress_t tempaddress;
3848         netconn_mempool = Mem_AllocPool("network connections", 0, NULL);
3849         Cmd_AddCommand("net_stats", Net_Stats_f, "print network statistics");
3850 #ifdef CONFIG_MENU
3851         Cmd_AddCommand("net_slist", Net_Slist_f, "query dp master servers and print all server information");
3852         Cmd_AddCommand("net_slistqw", Net_SlistQW_f, "query qw master servers and print all server information");
3853         Cmd_AddCommand("net_refresh", Net_Refresh_f, "query dp master servers and refresh all server information");
3854 #endif
3855         Cmd_AddCommand("heartbeat", Net_Heartbeat_f, "send a heartbeat to the master server (updates your server information)");
3856         Cvar_RegisterVariable(&net_test);
3857         Cvar_RegisterVariable(&net_usesizelimit);
3858         Cvar_RegisterVariable(&net_burstreserve);
3859         Cvar_RegisterVariable(&rcon_restricted_password);
3860         Cvar_RegisterVariable(&rcon_restricted_commands);
3861         Cvar_RegisterVariable(&rcon_secure_maxdiff);
3862         Cvar_RegisterVariable(&net_slist_queriespersecond);
3863         Cvar_RegisterVariable(&net_slist_queriesperframe);
3864         Cvar_RegisterVariable(&net_slist_timeout);
3865         Cvar_RegisterVariable(&net_slist_maxtries);
3866         Cvar_RegisterVariable(&net_slist_favorites);
3867         Cvar_RegisterVariable(&net_slist_pause);
3868         if(LHNET_DefaultDSCP(-1) >= 0) // register cvar only if supported
3869                 Cvar_RegisterVariable(&net_tos_dscp);
3870         Cvar_RegisterVariable(&net_messagetimeout);
3871         Cvar_RegisterVariable(&net_connecttimeout);
3872         Cvar_RegisterVariable(&net_connectfloodblockingtimeout);
3873         Cvar_RegisterVariable(&net_challengefloodblockingtimeout);
3874         Cvar_RegisterVariable(&net_getstatusfloodblockingtimeout);
3875         Cvar_RegisterVariable(&net_sourceaddresscheck);
3876         Cvar_RegisterVariable(&cl_netlocalping);
3877         Cvar_RegisterVariable(&cl_netpacketloss_send);
3878         Cvar_RegisterVariable(&cl_netpacketloss_receive);
3879         Cvar_RegisterVariable(&hostname);
3880         Cvar_RegisterVariable(&developer_networking);
3881         Cvar_RegisterVariable(&cl_netport);
3882         Cvar_RegisterVariable(&sv_netport);
3883         Cvar_RegisterVariable(&net_address);
3884         Cvar_RegisterVariable(&net_address_ipv6);
3885         Cvar_RegisterVariable(&sv_public);
3886         Cvar_RegisterVariable(&sv_public_rejectreason);
3887         Cvar_RegisterVariable(&sv_heartbeatperiod);
3888         for (i = 0;sv_masters[i].name;i++)
3889                 Cvar_RegisterVariable(&sv_masters[i]);
3890         Cvar_RegisterVariable(&gameversion);
3891         Cvar_RegisterVariable(&gameversion_min);
3892         Cvar_RegisterVariable(&gameversion_max);
3893 // 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.
3894         if ((i = COM_CheckParm("-ip")) && i + 1 < com_argc)
3895         {
3896                 if (LHNETADDRESS_FromString(&tempaddress, com_argv[i + 1], 0) == 1)
3897                 {
3898                         Con_Printf("-ip option used, setting net_address to \"%s\"\n", com_argv[i + 1]);
3899                         Cvar_SetQuick(&net_address, com_argv[i + 1]);
3900                 }
3901                 else
3902                         Con_Printf("-ip option used, but unable to parse the address \"%s\"\n", com_argv[i + 1]);
3903         }
3904 // 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
3905         if (((i = COM_CheckParm("-port")) || (i = COM_CheckParm("-ipport")) || (i = COM_CheckParm("-udpport"))) && i + 1 < com_argc)
3906         {
3907                 i = atoi(com_argv[i + 1]);
3908                 if (i >= 0 && i < 65536)
3909                 {
3910                         Con_Printf("-port option used, setting port cvar to %i\n", i);
3911                         Cvar_SetValueQuick(&sv_netport, i);
3912                 }
3913                 else
3914                         Con_Printf("-port option used, but %i is not a valid port number\n", i);
3915         }
3916         cl_numsockets = 0;
3917         sv_numsockets = 0;
3918         cl_message.data = cl_message_buf;
3919         cl_message.maxsize = sizeof(cl_message_buf);
3920         cl_message.cursize = 0;
3921         sv_message.data = sv_message_buf;
3922         sv_message.maxsize = sizeof(sv_message_buf);
3923         sv_message.cursize = 0;
3924         LHNET_Init();
3925         if (Thread_HasThreads())
3926                 netconn_mutex = Thread_CreateMutex();
3927 }
3928
3929 void NetConn_Shutdown(void)
3930 {
3931         NetConn_CloseClientPorts();
3932         NetConn_CloseServerPorts();
3933         LHNET_Shutdown();
3934         if (netconn_mutex)
3935                 Thread_DestroyMutex(netconn_mutex);
3936         netconn_mutex = NULL;
3937 }
3938