/* Copyright (C) 1996-1997 Id Software, Inc. Copyright (C) 2002 Mathieu Olivier Copyright (C) 2003 Forest Hale This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "quakedef.h" #include "lhnet.h" // for secure rcon authentication #include "hmac.h" #include "mdfour.h" #include #define QWMASTER_PORT 27000 #define DPMASTER_PORT 27950 // note this defaults on for dedicated servers, off for listen servers 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"}; cvar_t sv_public_rejectreason = {0, "sv_public_rejectreason", "The server is closing.", "Rejection reason for connects when sv_public is -2"}; static cvar_t sv_heartbeatperiod = {CVAR_SAVE, "sv_heartbeatperiod", "120", "how often to send heartbeat in seconds (only used if sv_public is 1)"}; extern cvar_t sv_status_privacy; static cvar_t sv_masters [] = { {CVAR_SAVE, "sv_master1", "", "user-chosen master server 1"}, {CVAR_SAVE, "sv_master2", "", "user-chosen master server 2"}, {CVAR_SAVE, "sv_master3", "", "user-chosen master server 3"}, {CVAR_SAVE, "sv_master4", "", "user-chosen master server 4"}, {0, "sv_masterextra1", "69.59.212.88", "ghdigital.com - default master server 1 (admin: LordHavoc)"}, // admin: LordHavoc {0, "sv_masterextra2", "64.22.107.125", "dpmaster.deathmask.net - default master server 2 (admin: Willis)"}, // admin: Willis {0, "sv_masterextra3", "92.62.40.73", "dpmaster.tchr.no - default master server 3 (admin: tChr)"}, // admin: tChr #ifdef SUPPORTIPV6 {0, "sv_masterextra4", "[2001:41d0:2:1628::4450]:27950", "dpmaster.div0.qc.to - default master server 4 (admin: divVerent)"}, // admin: divVerent #endif {0, NULL, NULL, NULL} }; static cvar_t sv_qwmasters [] = { {CVAR_SAVE, "sv_qwmaster1", "", "user-chosen qwmaster server 1"}, {CVAR_SAVE, "sv_qwmaster2", "", "user-chosen qwmaster server 2"}, {CVAR_SAVE, "sv_qwmaster3", "", "user-chosen qwmaster server 3"}, {CVAR_SAVE, "sv_qwmaster4", "", "user-chosen qwmaster server 4"}, {0, "sv_qwmasterextra1", "master.quakeservers.net:27000", "Global master server. (admin: unknown)"}, {0, "sv_qwmasterextra2", "asgaard.morphos-team.net:27000", "Global master server. (admin: unknown)"}, {0, "sv_qwmasterextra3", "qwmaster.ocrana.de:27000", "German master server. (admin: unknown)"}, {0, "sv_qwmasterextra4", "masterserver.exhale.de:27000", "German master server. (admin: unknown)"}, {0, "sv_qwmasterextra5", "kubus.rulez.pl:27000", "Poland master server. (admin: unknown)"}, {0, NULL, NULL, NULL} }; static double nextheartbeattime = 0; sizebuf_t net_message; static unsigned char net_message_buf[NET_MAXMESSAGE]; cvar_t net_messagetimeout = {0, "net_messagetimeout","300", "drops players who have not sent any packets for this many seconds"}; 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."}; 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)"}; cvar_t hostname = {CVAR_SAVE, "hostname", "UNNAMED", "server message to show in server browser"}; cvar_t developer_networking = {0, "developer_networking", "0", "prints all received and sent packets (recommended only for debugging)"}; 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)"}; 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)"}; 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)"}; static cvar_t net_slist_queriespersecond = {0, "net_slist_queriespersecond", "20", "how many server information requests to send per second"}; 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)"}; static cvar_t net_slist_timeout = {0, "net_slist_timeout", "4", "how long to listen for a server information response before giving up"}; 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"}; 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)"}; 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"}; static cvar_t gameversion = {0, "gameversion", "0", "version of game data (mod-specific) to be sent to querying clients"}; 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"}; 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"}; 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"}; static cvar_t rcon_restricted_commands = {0, "rcon_restricted_commands", "", "allowed commands for rcon when the restricted mode password was used"}; 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)"}; extern cvar_t rcon_secure; extern cvar_t rcon_secure_challengetimeout; /* statistic counters */ static int packetsSent = 0; static int packetsReSent = 0; static int packetsReceived = 0; static int receivedDuplicateCount = 0; static int droppedDatagrams = 0; static int unreliableMessagesSent = 0; static int unreliableMessagesReceived = 0; static int reliableMessagesSent = 0; static int reliableMessagesReceived = 0; double masterquerytime = -1000; int masterquerycount = 0; int masterreplycount = 0; int serverquerycount = 0; int serverreplycount = 0; challenge_t challenge[MAX_CHALLENGES]; /// this is only false if there are still servers left to query static qboolean serverlist_querysleep = true; static qboolean serverlist_paused = false; /// this is pushed a second or two ahead of realtime whenever a master server /// reply is received, to avoid issuing queries while master replies are still /// flooding in (which would make a mess of the ping times) static double serverlist_querywaittime = 0; static unsigned char sendbuffer[NET_HEADERSIZE+NET_MAXMESSAGE]; static unsigned char readbuffer[NET_HEADERSIZE+NET_MAXMESSAGE]; static unsigned char cryptosendbuffer[NET_HEADERSIZE+NET_MAXMESSAGE+CRYPTO_HEADERSIZE]; static unsigned char cryptoreadbuffer[NET_HEADERSIZE+NET_MAXMESSAGE+CRYPTO_HEADERSIZE]; static int cl_numsockets; static lhnetsocket_t *cl_sockets[16]; static int sv_numsockets; static lhnetsocket_t *sv_sockets[16]; netconn_t *netconn_list = NULL; mempool_t *netconn_mempool = NULL; cvar_t cl_netport = {0, "cl_port", "0", "forces client to use chosen port number if not 0"}; cvar_t sv_netport = {0, "port", "26000", "server port for players to connect to"}; cvar_t net_address = {0, "net_address", "", "network address to open ipv4 ports on (if empty, use default interfaces)"}; cvar_t net_address_ipv6 = {0, "net_address_ipv6", "", "network address to open ipv6 ports on (if empty, use default interfaces)"}; char cl_net_extresponse[NET_EXTRESPONSE_MAX][1400]; int cl_net_extresponse_count = 0; int cl_net_extresponse_last = 0; char sv_net_extresponse[NET_EXTRESPONSE_MAX][1400]; int sv_net_extresponse_count = 0; int sv_net_extresponse_last = 0; // ServerList interface serverlist_mask_t serverlist_andmasks[SERVERLIST_ANDMASKCOUNT]; serverlist_mask_t serverlist_ormasks[SERVERLIST_ORMASKCOUNT]; serverlist_infofield_t serverlist_sortbyfield; int serverlist_sortflags; int serverlist_viewcount = 0; unsigned short serverlist_viewlist[SERVERLIST_VIEWLISTSIZE]; int serverlist_maxcachecount = 0; int serverlist_cachecount = 0; serverlist_entry_t *serverlist_cache = NULL; qboolean serverlist_consoleoutput; static int nFavorites = 0; static lhnetaddress_t favorites[MAX_FAVORITESERVERS]; static int nFavorites_idfp = 0; static char favorites_idfp[MAX_FAVORITESERVERS][FP64_SIZE+1]; void NetConn_UpdateFavorites(void) { const char *p; nFavorites = 0; nFavorites_idfp = 0; p = net_slist_favorites.string; while((size_t) nFavorites < sizeof(favorites) / sizeof(*favorites) && COM_ParseToken_Console(&p)) { if(com_token[0] != '[' && strlen(com_token) == FP64_SIZE && !strchr(com_token, '.')) // currently 44 bytes, longest possible IPv6 address: 39 bytes, so this works // (if v6 address contains port, it must start with '[') { strlcpy(favorites_idfp[nFavorites_idfp], com_token, sizeof(favorites_idfp[nFavorites_idfp])); ++nFavorites_idfp; } else { if(LHNETADDRESS_FromString(&favorites[nFavorites], com_token, 26000)) ++nFavorites; } } } /// helper function to insert a value into the viewset /// spare entries will be removed static void _ServerList_ViewList_Helper_InsertBefore( int index, serverlist_entry_t *entry ) { int i; if( serverlist_viewcount < SERVERLIST_VIEWLISTSIZE ) { i = serverlist_viewcount++; } else { i = SERVERLIST_VIEWLISTSIZE - 1; } for( ; i > index ; i-- ) serverlist_viewlist[ i ] = serverlist_viewlist[ i - 1 ]; serverlist_viewlist[index] = (int)(entry - serverlist_cache); } /// we suppose serverlist_viewcount to be valid, ie > 0 static void _ServerList_ViewList_Helper_Remove( int index ) { serverlist_viewcount--; for( ; index < serverlist_viewcount ; index++ ) serverlist_viewlist[index] = serverlist_viewlist[index + 1]; } /// \returns true if A should be inserted before B static qboolean _ServerList_Entry_Compare( serverlist_entry_t *A, serverlist_entry_t *B ) { int result = 0; // > 0 if for numbers A > B and for text if A < B if( serverlist_sortflags & SLSF_FAVORITESFIRST ) { if(A->info.isfavorite != B->info.isfavorite) return A->info.isfavorite; } switch( serverlist_sortbyfield ) { case SLIF_PING: result = A->info.ping - B->info.ping; break; case SLIF_MAXPLAYERS: result = A->info.maxplayers - B->info.maxplayers; break; case SLIF_NUMPLAYERS: result = A->info.numplayers - B->info.numplayers; break; case SLIF_NUMBOTS: result = A->info.numbots - B->info.numbots; break; case SLIF_NUMHUMANS: result = A->info.numhumans - B->info.numhumans; break; case SLIF_FREESLOTS: result = A->info.freeslots - B->info.freeslots; break; case SLIF_PROTOCOL: result = A->info.protocol - B->info.protocol; break; case SLIF_CNAME: result = strcmp( B->info.cname, A->info.cname ); break; case SLIF_GAME: result = strcasecmp( B->info.game, A->info.game ); break; case SLIF_MAP: result = strcasecmp( B->info.map, A->info.map ); break; case SLIF_MOD: result = strcasecmp( B->info.mod, A->info.mod ); break; case SLIF_NAME: result = strcasecmp( B->info.name, A->info.name ); break; case SLIF_QCSTATUS: result = strcasecmp( B->info.qcstatus, A->info.qcstatus ); // not really THAT useful, though break; case SLIF_ISFAVORITE: result = !!B->info.isfavorite - !!A->info.isfavorite; break; default: Con_DPrint( "_ServerList_Entry_Compare: Bad serverlist_sortbyfield!\n" ); break; } if (result != 0) { if( serverlist_sortflags & SLSF_DESCENDING ) return result > 0; else return result < 0; } // if the chosen sort key is identical, sort by index // (makes this a stable sort, so that later replies from servers won't // shuffle the servers around when they have the same ping) return A < B; } static qboolean _ServerList_CompareInt( int A, serverlist_maskop_t op, int B ) { // This should actually be done with some intermediate and end-of-function return switch( op ) { case SLMO_LESS: return A < B; case SLMO_LESSEQUAL: return A <= B; case SLMO_EQUAL: return A == B; case SLMO_GREATER: return A > B; case SLMO_NOTEQUAL: return A != B; case SLMO_GREATEREQUAL: case SLMO_CONTAINS: case SLMO_NOTCONTAIN: case SLMO_STARTSWITH: case SLMO_NOTSTARTSWITH: return A >= B; default: Con_DPrint( "_ServerList_CompareInt: Bad op!\n" ); return false; } } static qboolean _ServerList_CompareStr( const char *A, serverlist_maskop_t op, const char *B ) { int i; char bufferA[ 1400 ], bufferB[ 1400 ]; // should be more than enough COM_StringDecolorize(A, 0, bufferA, sizeof(bufferA), false); for (i = 0;i < (int)sizeof(bufferA)-1 && bufferA[i];i++) bufferA[i] = (bufferA[i] >= 'A' && bufferA[i] <= 'Z') ? (bufferA[i] + 'a' - 'A') : bufferA[i]; bufferA[i] = 0; for (i = 0;i < (int)sizeof(bufferB)-1 && B[i];i++) bufferB[i] = (B[i] >= 'A' && B[i] <= 'Z') ? (B[i] + 'a' - 'A') : B[i]; bufferB[i] = 0; // Same here, also using an intermediate & final return would be more appropriate // A info B mask switch( op ) { case SLMO_CONTAINS: return *bufferB && !!strstr( bufferA, bufferB ); // we want a real bool case SLMO_NOTCONTAIN: return !*bufferB || !strstr( bufferA, bufferB ); case SLMO_STARTSWITH: //Con_Printf("startsWith: %s %s\n", bufferA, bufferB); return *bufferB && !memcmp(bufferA, bufferB, strlen(bufferB)); case SLMO_NOTSTARTSWITH: return !*bufferB || memcmp(bufferA, bufferB, strlen(bufferB)); case SLMO_LESS: return strcmp( bufferA, bufferB ) < 0; case SLMO_LESSEQUAL: return strcmp( bufferA, bufferB ) <= 0; case SLMO_EQUAL: return strcmp( bufferA, bufferB ) == 0; case SLMO_GREATER: return strcmp( bufferA, bufferB ) > 0; case SLMO_NOTEQUAL: return strcmp( bufferA, bufferB ) != 0; case SLMO_GREATEREQUAL: return strcmp( bufferA, bufferB ) >= 0; default: Con_DPrint( "_ServerList_CompareStr: Bad op!\n" ); return false; } } static qboolean _ServerList_Entry_Mask( serverlist_mask_t *mask, serverlist_info_t *info ) { if( !_ServerList_CompareInt( info->ping, mask->tests[SLIF_PING], mask->info.ping ) ) return false; if( !_ServerList_CompareInt( info->maxplayers, mask->tests[SLIF_MAXPLAYERS], mask->info.maxplayers ) ) return false; if( !_ServerList_CompareInt( info->numplayers, mask->tests[SLIF_NUMPLAYERS], mask->info.numplayers ) ) return false; if( !_ServerList_CompareInt( info->numbots, mask->tests[SLIF_NUMBOTS], mask->info.numbots ) ) return false; if( !_ServerList_CompareInt( info->numhumans, mask->tests[SLIF_NUMHUMANS], mask->info.numhumans ) ) return false; if( !_ServerList_CompareInt( info->freeslots, mask->tests[SLIF_FREESLOTS], mask->info.freeslots ) ) return false; if( !_ServerList_CompareInt( info->protocol, mask->tests[SLIF_PROTOCOL], mask->info.protocol )) return false; if( *mask->info.cname && !_ServerList_CompareStr( info->cname, mask->tests[SLIF_CNAME], mask->info.cname ) ) return false; if( *mask->info.game && !_ServerList_CompareStr( info->game, mask->tests[SLIF_GAME], mask->info.game ) ) return false; if( *mask->info.mod && !_ServerList_CompareStr( info->mod, mask->tests[SLIF_MOD], mask->info.mod ) ) return false; if( *mask->info.map && !_ServerList_CompareStr( info->map, mask->tests[SLIF_MAP], mask->info.map ) ) return false; if( *mask->info.name && !_ServerList_CompareStr( info->name, mask->tests[SLIF_NAME], mask->info.name ) ) return false; if( *mask->info.qcstatus && !_ServerList_CompareStr( info->qcstatus, mask->tests[SLIF_QCSTATUS], mask->info.qcstatus ) ) return false; if( *mask->info.players && !_ServerList_CompareStr( info->players, mask->tests[SLIF_PLAYERS], mask->info.players ) ) return false; if( !_ServerList_CompareInt( info->isfavorite, mask->tests[SLIF_ISFAVORITE], mask->info.isfavorite )) return false; return true; } static void ServerList_ViewList_Insert( serverlist_entry_t *entry ) { int start, end, mid, i; lhnetaddress_t addr; // reject incompatible servers if( entry->info.gameversion != gameversion.integer && !( gameversion_min.integer >= 0 // min/max range set by user/mod? && gameversion_max.integer >= 0 && gameversion_min.integer >= entry->info.gameversion // version of server in min/max range? && gameversion_max.integer <= entry->info.gameversion ) ) return; // refresh the "favorite" status entry->info.isfavorite = false; if(LHNETADDRESS_FromString(&addr, entry->info.cname, 26000)) { char idfp[FP64_SIZE+1]; for(i = 0; i < nFavorites; ++i) { if(LHNETADDRESS_Compare(&addr, &favorites[i]) == 0) { entry->info.isfavorite = true; break; } } if(Crypto_RetrieveHostKey(&addr, 0, NULL, 0, idfp, sizeof(idfp), NULL)) { for(i = 0; i < nFavorites_idfp; ++i) { if(!strcmp(idfp, favorites_idfp[i])) { entry->info.isfavorite = true; break; } } } } // FIXME: change this to be more readable (...) // now check whether it passes through the masks for( start = 0 ; start < SERVERLIST_ANDMASKCOUNT && serverlist_andmasks[start].active; start++ ) if( !_ServerList_Entry_Mask( &serverlist_andmasks[start], &entry->info ) ) return; for( start = 0 ; start < SERVERLIST_ORMASKCOUNT && serverlist_ormasks[start].active ; start++ ) if( _ServerList_Entry_Mask( &serverlist_ormasks[start], &entry->info ) ) break; if( start == SERVERLIST_ORMASKCOUNT || (start > 0 && !serverlist_ormasks[start].active) ) return; if( !serverlist_viewcount ) { _ServerList_ViewList_Helper_InsertBefore( 0, entry ); return; } // ok, insert it, we just need to find out where exactly: // two special cases // check whether to insert it as new first item if( _ServerList_Entry_Compare( entry, ServerList_GetViewEntry(0) ) ) { _ServerList_ViewList_Helper_InsertBefore( 0, entry ); return; } // check whether to insert it as new last item else if( !_ServerList_Entry_Compare( entry, ServerList_GetViewEntry(serverlist_viewcount - 1) ) ) { _ServerList_ViewList_Helper_InsertBefore( serverlist_viewcount, entry ); return; } start = 0; end = serverlist_viewcount - 1; while( end > start + 1 ) { mid = (start + end) / 2; // test the item that lies in the middle between start and end if( _ServerList_Entry_Compare( entry, ServerList_GetViewEntry(mid) ) ) // the item has to be in the upper half end = mid; else // the item has to be in the lower half start = mid; } _ServerList_ViewList_Helper_InsertBefore( start + 1, entry ); } static void ServerList_ViewList_Remove( serverlist_entry_t *entry ) { int i; for( i = 0; i < serverlist_viewcount; i++ ) { if (ServerList_GetViewEntry(i) == entry) { _ServerList_ViewList_Helper_Remove(i); break; } } } void ServerList_RebuildViewList(void) { int i; serverlist_viewcount = 0; for( i = 0 ; i < serverlist_cachecount ; i++ ) { serverlist_entry_t *entry = &serverlist_cache[i]; // also display entries that are currently being refreshed [11/8/2007 Black] if( entry->query == SQS_QUERIED || entry->query == SQS_REFRESHING ) ServerList_ViewList_Insert( entry ); } } void ServerList_ResetMasks(void) { int i; memset( &serverlist_andmasks, 0, sizeof( serverlist_andmasks ) ); memset( &serverlist_ormasks, 0, sizeof( serverlist_ormasks ) ); // numbots needs to be compared to -1 to always succeed for(i = 0; i < SERVERLIST_ANDMASKCOUNT; ++i) serverlist_andmasks[i].info.numbots = -1; for(i = 0; i < SERVERLIST_ORMASKCOUNT; ++i) serverlist_ormasks[i].info.numbots = -1; } void ServerList_GetPlayerStatistics(int *numplayerspointer, int *maxplayerspointer) { int i; int numplayers = 0, maxplayers = 0; for (i = 0;i < serverlist_cachecount;i++) { if (serverlist_cache[i].query == SQS_QUERIED) { numplayers += serverlist_cache[i].info.numhumans; maxplayers += serverlist_cache[i].info.maxplayers; } } *numplayerspointer = numplayers; *maxplayerspointer = maxplayers; } #if 0 static void _ServerList_Test(void) { int i; if (serverlist_maxcachecount <= 1024) { serverlist_maxcachecount = 1024; serverlist_cache = (serverlist_entry_t *)Mem_Realloc(netconn_mempool, (void *)serverlist_cache, sizeof(serverlist_entry_t) * serverlist_maxcachecount); } for( i = 0 ; i < 1024 ; i++ ) { memset( &serverlist_cache[serverlist_cachecount], 0, sizeof( serverlist_entry_t ) ); serverlist_cache[serverlist_cachecount].info.ping = 1000 + 1024 - i; dpsnprintf( serverlist_cache[serverlist_cachecount].info.name, sizeof(serverlist_cache[serverlist_cachecount].info.name), "Black's ServerList Test %i", i ); serverlist_cache[serverlist_cachecount].finished = true; 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 ); ServerList_ViewList_Insert( &serverlist_cache[serverlist_cachecount] ); serverlist_cachecount++; } } #endif void ServerList_QueryList(qboolean resetcache, qboolean querydp, qboolean queryqw, qboolean consoleoutput) { masterquerytime = realtime; masterquerycount = 0; masterreplycount = 0; if( resetcache ) { serverquerycount = 0; serverreplycount = 0; serverlist_cachecount = 0; serverlist_viewcount = 0; serverlist_maxcachecount = 0; serverlist_cache = (serverlist_entry_t *)Mem_Realloc(netconn_mempool, (void *)serverlist_cache, sizeof(serverlist_entry_t) * serverlist_maxcachecount); } else { // refresh all entries int n; for( n = 0 ; n < serverlist_cachecount ; n++ ) { serverlist_entry_t *entry = &serverlist_cache[ n ]; entry->query = SQS_REFRESHING; entry->querycounter = 0; } } serverlist_consoleoutput = consoleoutput; //_ServerList_Test(); NetConn_QueryMasters(querydp, queryqw); } // rest int NetConn_Read(lhnetsocket_t *mysocket, void *data, int maxlength, lhnetaddress_t *peeraddress) { int length = LHNET_Read(mysocket, data, maxlength, peeraddress); int i; if (length == 0) return 0; if (cl_netpacketloss_receive.integer) for (i = 0;i < cl_numsockets;i++) if (cl_sockets[i] == mysocket && (rand() % 100) < cl_netpacketloss_receive.integer) return 0; if (developer_networking.integer) { char addressstring[128], addressstring2[128]; LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true); if (length > 0) { LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true); Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i from %s:\n", (void *)mysocket, addressstring, (void *)data, maxlength, (void *)peeraddress, length, addressstring2); Com_HexDumpToConsole((unsigned char *)data, length); } else Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i\n", (void *)mysocket, addressstring, (void *)data, maxlength, (void *)peeraddress, length); } return length; } int NetConn_Write(lhnetsocket_t *mysocket, const void *data, int length, const lhnetaddress_t *peeraddress) { int ret; int i; if (cl_netpacketloss_send.integer) for (i = 0;i < cl_numsockets;i++) if (cl_sockets[i] == mysocket && (rand() % 100) < cl_netpacketloss_send.integer) return length; ret = LHNET_Write(mysocket, data, length, peeraddress); if (developer_networking.integer) { char addressstring[128], addressstring2[128]; LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true); LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true); 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)"); Com_HexDumpToConsole((unsigned char *)data, length); } return ret; } int NetConn_WriteString(lhnetsocket_t *mysocket, const char *string, const lhnetaddress_t *peeraddress) { // note this does not include the trailing NULL because we add that in the parser return NetConn_Write(mysocket, string, (int)strlen(string), peeraddress); } qboolean NetConn_CanSend(netconn_t *conn) { conn->outgoing_packetcounter = (conn->outgoing_packetcounter + 1) % NETGRAPH_PACKETS; conn->outgoing_netgraph[conn->outgoing_packetcounter].time = realtime; conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes = NETGRAPH_NOPACKET; conn->outgoing_netgraph[conn->outgoing_packetcounter].reliablebytes = NETGRAPH_NOPACKET; conn->outgoing_netgraph[conn->outgoing_packetcounter].ackbytes = NETGRAPH_NOPACKET; if (realtime > conn->cleartime) return true; else { conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes = NETGRAPH_CHOKEDPACKET; return false; } } int NetConn_SendUnreliableMessage(netconn_t *conn, sizebuf_t *data, protocolversion_t protocol, int rate, qboolean quakesignon_suppressreliables) { int totallen = 0; // if this packet was supposedly choked, but we find ourselves sending one // anyway, make sure the size counting starts at zero // (this mostly happens on level changes and disconnects and such) if (conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes == NETGRAPH_CHOKEDPACKET) conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes = NETGRAPH_NOPACKET; if (protocol == PROTOCOL_QUAKEWORLD) { int packetLen; qboolean sendreliable; // note that it is ok to send empty messages to the qw server, // otherwise it won't respond to us at all sendreliable = false; // if the remote side dropped the last reliable message, resend it if (conn->qw.incoming_acknowledged > conn->qw.last_reliable_sequence && conn->qw.incoming_reliable_acknowledged != conn->qw.reliable_sequence) sendreliable = true; // if the reliable transmit buffer is empty, copy the current message out if (!conn->sendMessageLength && conn->message.cursize) { memcpy (conn->sendMessage, conn->message.data, conn->message.cursize); conn->sendMessageLength = conn->message.cursize; SZ_Clear(&conn->message); // clear the message buffer conn->qw.reliable_sequence ^= 1; sendreliable = true; } // outgoing unreliable packet number, and outgoing reliable packet number (0 or 1) StoreLittleLong(sendbuffer, (unsigned int)conn->outgoing_unreliable_sequence | ((unsigned int)sendreliable<<31)); // last received unreliable packet number, and last received reliable packet number (0 or 1) StoreLittleLong(sendbuffer + 4, (unsigned int)conn->qw.incoming_sequence | ((unsigned int)conn->qw.incoming_reliable_sequence<<31)); packetLen = 8; conn->outgoing_unreliable_sequence++; // client sends qport in every packet if (conn == cls.netcon) { *((short *)(sendbuffer + 8)) = LittleShort(cls.qw_qport); packetLen += 2; // also update cls.qw_outgoing_sequence cls.qw_outgoing_sequence = conn->outgoing_unreliable_sequence; } if (packetLen + (sendreliable ? conn->sendMessageLength : 0) > 1400) { Con_Printf ("NetConn_SendUnreliableMessage: reliable message too big %u\n", data->cursize); return -1; } conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes += packetLen + 28; // add the reliable message if there is one if (sendreliable) { conn->outgoing_netgraph[conn->outgoing_packetcounter].reliablebytes += conn->sendMessageLength + 28; memcpy(sendbuffer + packetLen, conn->sendMessage, conn->sendMessageLength); packetLen += conn->sendMessageLength; conn->qw.last_reliable_sequence = conn->outgoing_unreliable_sequence; } // add the unreliable message if possible if (packetLen + data->cursize <= 1400) { conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes += data->cursize + 28; memcpy(sendbuffer + packetLen, data->data, data->cursize); packetLen += data->cursize; } NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress); packetsSent++; unreliableMessagesSent++; totallen += packetLen + 28; } else { unsigned int packetLen; unsigned int dataLen; unsigned int eom; const void *sendme; size_t sendmelen; // if a reliable message fragment has been lost, send it again if (conn->sendMessageLength && (realtime - conn->lastSendTime) > 1.0) { if (conn->sendMessageLength <= MAX_PACKETFRAGMENT) { dataLen = conn->sendMessageLength; eom = NETFLAG_EOM; } else { dataLen = MAX_PACKETFRAGMENT; eom = 0; } packetLen = NET_HEADERSIZE + dataLen; StoreBigLong(sendbuffer, packetLen | (NETFLAG_DATA | eom)); StoreBigLong(sendbuffer + 4, conn->nq.sendSequence - 1); memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen); conn->outgoing_netgraph[conn->outgoing_packetcounter].reliablebytes += packetLen + 28; sendme = Crypto_EncryptPacket(&conn->crypto, &sendbuffer, packetLen, &cryptosendbuffer, &sendmelen, sizeof(cryptosendbuffer)); if (sendme && NetConn_Write(conn->mysocket, sendme, sendmelen, &conn->peeraddress) == (int)sendmelen) { conn->lastSendTime = realtime; packetsReSent++; } totallen += sendmelen + 28; } // if we have a new reliable message to send, do so if (!conn->sendMessageLength && conn->message.cursize && !quakesignon_suppressreliables) { if (conn->message.cursize > (int)sizeof(conn->sendMessage)) { Con_Printf("NetConn_SendUnreliableMessage: reliable message too big (%u > %u)\n", conn->message.cursize, (int)sizeof(conn->sendMessage)); conn->message.overflowed = true; return -1; } if (developer_networking.integer && conn == cls.netcon) { Con_Print("client sending reliable message to server:\n"); SZ_HexDumpToConsole(&conn->message); } memcpy(conn->sendMessage, conn->message.data, conn->message.cursize); conn->sendMessageLength = conn->message.cursize; SZ_Clear(&conn->message); if (conn->sendMessageLength <= MAX_PACKETFRAGMENT) { dataLen = conn->sendMessageLength; eom = NETFLAG_EOM; } else { dataLen = MAX_PACKETFRAGMENT; eom = 0; } packetLen = NET_HEADERSIZE + dataLen; StoreBigLong(sendbuffer, packetLen | (NETFLAG_DATA | eom)); StoreBigLong(sendbuffer + 4, conn->nq.sendSequence); memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen); conn->nq.sendSequence++; conn->outgoing_netgraph[conn->outgoing_packetcounter].reliablebytes += packetLen + 28; sendme = Crypto_EncryptPacket(&conn->crypto, &sendbuffer, packetLen, &cryptosendbuffer, &sendmelen, sizeof(cryptosendbuffer)); if(sendme) NetConn_Write(conn->mysocket, sendme, sendmelen, &conn->peeraddress); conn->lastSendTime = realtime; packetsSent++; reliableMessagesSent++; totallen += sendmelen + 28; } // if we have an unreliable message to send, do so if (data->cursize) { packetLen = NET_HEADERSIZE + data->cursize; if (packetLen > (int)sizeof(sendbuffer)) { Con_Printf("NetConn_SendUnreliableMessage: message too big %u\n", data->cursize); return -1; } StoreBigLong(sendbuffer, packetLen | NETFLAG_UNRELIABLE); StoreBigLong(sendbuffer + 4, conn->outgoing_unreliable_sequence); memcpy(sendbuffer + NET_HEADERSIZE, data->data, data->cursize); conn->outgoing_unreliable_sequence++; conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes += packetLen + 28; sendme = Crypto_EncryptPacket(&conn->crypto, &sendbuffer, packetLen, &cryptosendbuffer, &sendmelen, sizeof(cryptosendbuffer)); if(sendme) NetConn_Write(conn->mysocket, sendme, sendmelen, &conn->peeraddress); packetsSent++; unreliableMessagesSent++; totallen += sendmelen + 28; } } // delay later packets to obey rate limit if (conn->cleartime < realtime - 0.1) conn->cleartime = realtime - 0.1; conn->cleartime = conn->cleartime + (double)totallen / (double)rate; if (conn->cleartime < realtime) conn->cleartime = realtime; return 0; } qboolean NetConn_HaveClientPorts(void) { return !!cl_numsockets; } qboolean NetConn_HaveServerPorts(void) { return !!sv_numsockets; } void NetConn_CloseClientPorts(void) { for (;cl_numsockets > 0;cl_numsockets--) if (cl_sockets[cl_numsockets - 1]) LHNET_CloseSocket(cl_sockets[cl_numsockets - 1]); } void NetConn_OpenClientPort(const char *addressstring, lhnetaddresstype_t addresstype, int defaultport) { lhnetaddress_t address; lhnetsocket_t *s; int success; char addressstring2[1024]; if (addressstring && addressstring[0]) success = LHNETADDRESS_FromString(&address, addressstring, defaultport); else success = LHNETADDRESS_FromPort(&address, addresstype, defaultport); if (success) { if ((s = LHNET_OpenSocket_Connectionless(&address))) { cl_sockets[cl_numsockets++] = s; LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true); if (addresstype != LHNETADDRESSTYPE_LOOP) Con_Printf("Client opened a socket on address %s\n", addressstring2); } else { LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true); Con_Printf("Client failed to open a socket on address %s\n", addressstring2); } } else Con_Printf("Client unable to parse address %s\n", addressstring); } void NetConn_OpenClientPorts(void) { int port; NetConn_CloseClientPorts(); port = bound(0, cl_netport.integer, 65535); if (cl_netport.integer != port) Cvar_SetValueQuick(&cl_netport, port); if(port == 0) Con_Printf("Client using an automatically assigned port\n"); else Con_Printf("Client using port %i\n", port); NetConn_OpenClientPort(NULL, LHNETADDRESSTYPE_LOOP, 2); NetConn_OpenClientPort(net_address.string, LHNETADDRESSTYPE_INET4, port); #ifdef SUPPORTIPV6 NetConn_OpenClientPort(net_address_ipv6.string, LHNETADDRESSTYPE_INET6, port); #endif } void NetConn_CloseServerPorts(void) { for (;sv_numsockets > 0;sv_numsockets--) if (sv_sockets[sv_numsockets - 1]) LHNET_CloseSocket(sv_sockets[sv_numsockets - 1]); } qboolean NetConn_OpenServerPort(const char *addressstring, lhnetaddresstype_t addresstype, int defaultport, int range) { lhnetaddress_t address; lhnetsocket_t *s; int port; char addressstring2[1024]; int success; for (port = defaultport; port <= defaultport + range; port++) { if (addressstring && addressstring[0]) success = LHNETADDRESS_FromString(&address, addressstring, port); else success = LHNETADDRESS_FromPort(&address, addresstype, port); if (success) { if ((s = LHNET_OpenSocket_Connectionless(&address))) { sv_sockets[sv_numsockets++] = s; LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true); if (addresstype != LHNETADDRESSTYPE_LOOP) Con_Printf("Server listening on address %s\n", addressstring2); return true; } else { LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true); Con_Printf("Server failed to open socket on address %s\n", addressstring2); } } else { Con_Printf("Server unable to parse address %s\n", addressstring); // if it cant parse one address, it wont be able to parse another for sure return false; } } return false; } void NetConn_OpenServerPorts(int opennetports) { int port; NetConn_CloseServerPorts(); NetConn_UpdateSockets(); port = bound(0, sv_netport.integer, 65535); if (port == 0) port = 26000; Con_Printf("Server using port %i\n", port); if (sv_netport.integer != port) Cvar_SetValueQuick(&sv_netport, port); if (cls.state != ca_dedicated) NetConn_OpenServerPort(NULL, LHNETADDRESSTYPE_LOOP, 1, 1); if (opennetports) { #ifdef SUPPORTIPV6 qboolean ip4success = NetConn_OpenServerPort(net_address.string, LHNETADDRESSTYPE_INET4, port, 100); NetConn_OpenServerPort(net_address_ipv6.string, LHNETADDRESSTYPE_INET6, port, ip4success ? 1 : 100); #else NetConn_OpenServerPort(net_address.string, LHNETADDRESSTYPE_INET4, port, 100); #endif } if (sv_numsockets == 0) Host_Error("NetConn_OpenServerPorts: unable to open any ports!"); } lhnetsocket_t *NetConn_ChooseClientSocketForAddress(lhnetaddress_t *address) { int i, a = LHNETADDRESS_GetAddressType(address); for (i = 0;i < cl_numsockets;i++) if (cl_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])) == a) return cl_sockets[i]; return NULL; } lhnetsocket_t *NetConn_ChooseServerSocketForAddress(lhnetaddress_t *address) { int i, a = LHNETADDRESS_GetAddressType(address); for (i = 0;i < sv_numsockets;i++) if (sv_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(sv_sockets[i])) == a) return sv_sockets[i]; return NULL; } netconn_t *NetConn_Open(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress) { netconn_t *conn; conn = (netconn_t *)Mem_Alloc(netconn_mempool, sizeof(*conn)); conn->mysocket = mysocket; conn->peeraddress = *peeraddress; conn->lastMessageTime = realtime; conn->message.data = conn->messagedata; conn->message.maxsize = sizeof(conn->messagedata); conn->message.cursize = 0; // LordHavoc: (inspired by ProQuake) use a short connect timeout to // reduce effectiveness of connection request floods conn->timeout = realtime + net_connecttimeout.value; LHNETADDRESS_ToString(&conn->peeraddress, conn->address, sizeof(conn->address), true); conn->next = netconn_list; netconn_list = conn; return conn; } void NetConn_ClearConnectFlood(lhnetaddress_t *peeraddress); void NetConn_Close(netconn_t *conn) { netconn_t *c; // remove connection from list // allow the client to reconnect immediately NetConn_ClearConnectFlood(&(conn->peeraddress)); if (conn == netconn_list) netconn_list = conn->next; else { for (c = netconn_list;c;c = c->next) { if (c->next == conn) { c->next = conn->next; break; } } // not found in list, we'll avoid crashing here... if (!c) return; } // free connection Mem_Free(conn); } static int clientport = -1; static int clientport2 = -1; static int hostport = -1; void NetConn_UpdateSockets(void) { int i, j; if (cls.state != ca_dedicated) { if (clientport2 != cl_netport.integer) { clientport2 = cl_netport.integer; if (cls.state == ca_connected) Con_Print("Changing \"cl_port\" will not take effect until you reconnect.\n"); } if (cls.state == ca_disconnected && clientport != clientport2) { clientport = clientport2; NetConn_CloseClientPorts(); } if (cl_numsockets == 0) NetConn_OpenClientPorts(); } if (hostport != sv_netport.integer) { hostport = sv_netport.integer; if (sv.active) Con_Print("Changing \"port\" will not take effect until \"map\" command is executed.\n"); } for (j = 0;j < MAX_RCONS;j++) { i = (cls.rcon_ringpos + j + 1) % MAX_RCONS; if(cls.rcon_commands[i][0]) { if(realtime > cls.rcon_timeout[i]) { char s[128]; LHNETADDRESS_ToString(&cls.rcon_addresses[i], s, sizeof(s), true); Con_Printf("rcon to %s (for command %s) failed: challenge request timed out\n", s, cls.rcon_commands[i]); cls.rcon_commands[i][0] = 0; --cls.rcon_trying; break; } } } } static int NetConn_ReceivedMessage(netconn_t *conn, const unsigned char *data, size_t length, protocolversion_t protocol, double newtimeout) { int originallength = length; if (length < 8) return 0; if (protocol == PROTOCOL_QUAKEWORLD) { int sequence, sequence_ack; int reliable_ack, reliable_message; int count; //int qport; sequence = LittleLong(*((int *)(data + 0))); sequence_ack = LittleLong(*((int *)(data + 4))); data += 8; length -= 8; if (conn != cls.netcon) { // server only if (length < 2) return 0; // 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?) //qport = LittleShort(*((int *)(data + 8))); data += 2; length -= 2; } packetsReceived++; reliable_message = (sequence >> 31) & 1; reliable_ack = (sequence_ack >> 31) & 1; sequence &= ~(1<<31); sequence_ack &= ~(1<<31); if (sequence <= conn->qw.incoming_sequence) { //Con_DPrint("Got a stale datagram\n"); return 0; } count = sequence - (conn->qw.incoming_sequence + 1); if (count > 0) { droppedDatagrams += count; //Con_DPrintf("Dropped %u datagram(s)\n", count); while (count--) { conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS; conn->incoming_netgraph[conn->incoming_packetcounter].time = realtime; conn->incoming_netgraph[conn->incoming_packetcounter].unreliablebytes = NETGRAPH_LOSTPACKET; conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes = NETGRAPH_NOPACKET; conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes = NETGRAPH_NOPACKET; } } conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS; conn->incoming_netgraph[conn->incoming_packetcounter].time = realtime; conn->incoming_netgraph[conn->incoming_packetcounter].unreliablebytes = originallength + 28; conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes = NETGRAPH_NOPACKET; conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes = NETGRAPH_NOPACKET; if (reliable_ack == conn->qw.reliable_sequence) { // received, now we will be able to send another reliable message conn->sendMessageLength = 0; reliableMessagesReceived++; } conn->qw.incoming_sequence = sequence; if (conn == cls.netcon) cls.qw_incoming_sequence = conn->qw.incoming_sequence; conn->qw.incoming_acknowledged = sequence_ack; conn->qw.incoming_reliable_acknowledged = reliable_ack; if (reliable_message) conn->qw.incoming_reliable_sequence ^= 1; conn->lastMessageTime = realtime; conn->timeout = realtime + newtimeout; unreliableMessagesReceived++; SZ_Clear(&net_message); SZ_Write(&net_message, data, length); MSG_BeginReading(); return 2; } else { unsigned int count; unsigned int flags; unsigned int sequence; size_t qlength; const void *sendme; size_t sendmelen; originallength = length; data = (const unsigned char *) Crypto_DecryptPacket(&conn->crypto, data, length, cryptoreadbuffer, &length, sizeof(cryptoreadbuffer)); if(!data) return 0; if(length < 8) return 0; qlength = (unsigned int)BuffBigLong(data); flags = qlength & ~NETFLAG_LENGTH_MASK; qlength &= NETFLAG_LENGTH_MASK; // control packets were already handled if (!(flags & NETFLAG_CTL) && qlength == length) { sequence = BuffBigLong(data + 4); packetsReceived++; data += 8; length -= 8; if (flags & NETFLAG_UNRELIABLE) { if (sequence >= conn->nq.unreliableReceiveSequence) { if (sequence > conn->nq.unreliableReceiveSequence) { count = sequence - conn->nq.unreliableReceiveSequence; droppedDatagrams += count; //Con_DPrintf("Dropped %u datagram(s)\n", count); while (count--) { conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS; conn->incoming_netgraph[conn->incoming_packetcounter].time = realtime; conn->incoming_netgraph[conn->incoming_packetcounter].unreliablebytes = NETGRAPH_LOSTPACKET; conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes = NETGRAPH_NOPACKET; conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes = NETGRAPH_NOPACKET; } } conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS; conn->incoming_netgraph[conn->incoming_packetcounter].time = realtime; conn->incoming_netgraph[conn->incoming_packetcounter].unreliablebytes = originallength + 28; conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes = NETGRAPH_NOPACKET; conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes = NETGRAPH_NOPACKET; conn->nq.unreliableReceiveSequence = sequence + 1; conn->lastMessageTime = realtime; conn->timeout = realtime + newtimeout; unreliableMessagesReceived++; if (length > 0) { SZ_Clear(&net_message); SZ_Write(&net_message, data, length); MSG_BeginReading(); return 2; } } //else // Con_DPrint("Got a stale datagram\n"); return 1; } else if (flags & NETFLAG_ACK) { conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes += originallength + 28; if (sequence == (conn->nq.sendSequence - 1)) { if (sequence == conn->nq.ackSequence) { conn->nq.ackSequence++; if (conn->nq.ackSequence != conn->nq.sendSequence) Con_DPrint("ack sequencing error\n"); conn->lastMessageTime = realtime; conn->timeout = realtime + newtimeout; if (conn->sendMessageLength > MAX_PACKETFRAGMENT) { unsigned int packetLen; unsigned int dataLen; unsigned int eom; conn->sendMessageLength -= MAX_PACKETFRAGMENT; memmove(conn->sendMessage, conn->sendMessage+MAX_PACKETFRAGMENT, conn->sendMessageLength); if (conn->sendMessageLength <= MAX_PACKETFRAGMENT) { dataLen = conn->sendMessageLength; eom = NETFLAG_EOM; } else { dataLen = MAX_PACKETFRAGMENT; eom = 0; } packetLen = NET_HEADERSIZE + dataLen; StoreBigLong(sendbuffer, packetLen | (NETFLAG_DATA | eom)); StoreBigLong(sendbuffer + 4, conn->nq.sendSequence); memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen); conn->nq.sendSequence++; sendme = Crypto_EncryptPacket(&conn->crypto, &sendbuffer, packetLen, &cryptosendbuffer, &sendmelen, sizeof(cryptosendbuffer)); if (sendme && NetConn_Write(conn->mysocket, sendme, sendmelen, &conn->peeraddress) == (int)sendmelen) { conn->lastSendTime = realtime; packetsSent++; } } else conn->sendMessageLength = 0; } //else // Con_DPrint("Duplicate ACK received\n"); } //else // Con_DPrint("Stale ACK received\n"); return 1; } else if (flags & NETFLAG_DATA) { unsigned char temppacket[8]; conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes += originallength + 28; conn->outgoing_netgraph[conn->outgoing_packetcounter].ackbytes += 8 + 28; StoreBigLong(temppacket, 8 | NETFLAG_ACK); StoreBigLong(temppacket + 4, sequence); sendme = Crypto_EncryptPacket(&conn->crypto, temppacket, 8, &cryptosendbuffer, &sendmelen, sizeof(cryptosendbuffer)); if(sendme) NetConn_Write(conn->mysocket, sendme, sendmelen, &conn->peeraddress); if (sequence == conn->nq.receiveSequence) { conn->lastMessageTime = realtime; conn->timeout = realtime + newtimeout; conn->nq.receiveSequence++; if( conn->receiveMessageLength + length <= (int)sizeof( conn->receiveMessage ) ) { memcpy(conn->receiveMessage + conn->receiveMessageLength, data, length); conn->receiveMessageLength += length; } else { Con_Printf( "Reliable message (seq: %i) too big for message buffer!\n" "Dropping the message!\n", sequence ); conn->receiveMessageLength = 0; return 1; } if (flags & NETFLAG_EOM) { reliableMessagesReceived++; length = conn->receiveMessageLength; conn->receiveMessageLength = 0; if (length > 0) { SZ_Clear(&net_message); SZ_Write(&net_message, conn->receiveMessage, length); MSG_BeginReading(); return 2; } } } else receivedDuplicateCount++; return 1; } } } return 0; } void NetConn_ConnectionEstablished(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress, protocolversion_t initialprotocol) { crypto_t *crypto; cls.connect_trying = false; M_Update_Return_Reason(""); // the connection request succeeded, stop current connection and set up a new connection CL_Disconnect(); // if we're connecting to a remote server, shut down any local server if (LHNETADDRESS_GetAddressType(peeraddress) != LHNETADDRESSTYPE_LOOP && sv.active) Host_ShutdownServer (); // allocate a net connection to keep track of things cls.netcon = NetConn_Open(mysocket, peeraddress); crypto = &cls.crypto; if(crypto && crypto->authenticated) { Crypto_ServerFinishInstance(&cls.netcon->crypto, crypto); Con_Printf("%s connection to %s has been established: server is %s@%.*s, I am %.*s@%.*s\n", crypto->use_aes ? "Encrypted" : "Authenticated", cls.netcon->address, crypto->server_idfp[0] ? crypto->server_idfp : "-", crypto_keyfp_recommended_length, crypto->server_keyfp[0] ? crypto->server_keyfp : "-", crypto_keyfp_recommended_length, crypto->client_idfp[0] ? crypto->client_idfp : "-", crypto_keyfp_recommended_length, crypto->client_keyfp[0] ? crypto->client_keyfp : "-" ); } Con_Printf("Connection accepted to %s\n", cls.netcon->address); key_dest = key_game; m_state = m_none; cls.demonum = -1; // not in the demo loop now cls.state = ca_connected; cls.signon = 0; // need all the signon messages before playing cls.protocol = initialprotocol; // reset move sequence numbering on this new connection cls.servermovesequence = 0; if (cls.protocol == PROTOCOL_QUAKEWORLD) Cmd_ForwardStringToServer("new"); if (cls.protocol == PROTOCOL_QUAKE) { // write a keepalive (clc_nop) as it seems to greatly improve the // chances of connecting to a netquake server sizebuf_t msg; unsigned char buf[4]; memset(&msg, 0, sizeof(msg)); msg.data = buf; msg.maxsize = sizeof(buf); MSG_WriteChar(&msg, clc_nop); NetConn_SendUnreliableMessage(cls.netcon, &msg, cls.protocol, 10000, false); } } int NetConn_IsLocalGame(void) { if (cls.state == ca_connected && sv.active && cl.maxclients == 1) return true; return false; } static int NetConn_ClientParsePacket_ServerList_ProcessReply(const char *addressstring) { int n; int pingtime; serverlist_entry_t *entry = NULL; // search the cache for this server and update it for (n = 0;n < serverlist_cachecount;n++) { entry = &serverlist_cache[ n ]; if (!strcmp(addressstring, entry->info.cname)) break; } if (n == serverlist_cachecount) { // LAN search doesnt require an answer from the master server so we wont // know the ping nor will it be initialized already... // find a slot if (serverlist_cachecount == SERVERLIST_TOTALSIZE) return -1; if (serverlist_maxcachecount <= serverlist_cachecount) { serverlist_maxcachecount += 64; serverlist_cache = (serverlist_entry_t *)Mem_Realloc(netconn_mempool, (void *)serverlist_cache, sizeof(serverlist_entry_t) * serverlist_maxcachecount); } entry = &serverlist_cache[n]; memset(entry, 0, sizeof(*entry)); // store the data the engine cares about (address and ping) strlcpy(entry->info.cname, addressstring, sizeof(entry->info.cname)); entry->info.ping = 100000; entry->querytime = realtime; // if not in the slist menu we should print the server to console if (serverlist_consoleoutput) Con_Printf("querying %s\n", addressstring); ++serverlist_cachecount; } // if this is the first reply from this server, count it as having replied pingtime = (int)((realtime - entry->querytime) * 1000.0 + 0.5); pingtime = bound(0, pingtime, 9999); if (entry->query == SQS_REFRESHING) { entry->info.ping = pingtime; entry->query = SQS_QUERIED; } else { // convert to unsigned to catch the -1 // 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] entry->info.ping = min((unsigned) entry->info.ping, (unsigned) pingtime); serverreplycount++; } // other server info is updated by the caller return n; } static void NetConn_ClientParsePacket_ServerList_UpdateCache(int n) { serverlist_entry_t *entry = &serverlist_cache[n]; serverlist_info_t *info = &entry->info; // update description strings for engine menu and console output 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); dpsnprintf(entry->line2, sizeof(serverlist_cache[n].line2), "^4%-21.21s %-19.19s ^%c%-17.17s^4 %-20.20s", info->cname, info->game, ( info->gameversion != gameversion.integer && !( gameversion_min.integer >= 0 // min/max range set by user/mod? && gameversion_max.integer >= 0 && gameversion_min.integer >= info->gameversion // version of server in min/max range? && gameversion_max.integer <= info->gameversion ) ) ? '1' : '4', info->mod, info->map); if (entry->query == SQS_QUERIED) { if(!serverlist_paused) ServerList_ViewList_Remove(entry); } // if not in the slist menu we should print the server to console (if wanted) else if( serverlist_consoleoutput ) Con_Printf("%s\n%s\n", serverlist_cache[n].line1, serverlist_cache[n].line2); // and finally, update the view set if(!serverlist_paused) ServerList_ViewList_Insert( entry ); // update the entry's state serverlist_cache[n].query = SQS_QUERIED; } // returns true, if it's sensible to continue the processing static qboolean NetConn_ClientParsePacket_ServerList_PrepareQuery( int protocol, const char *ipstring, qboolean isfavorite ) { int n; serverlist_entry_t *entry; // ignore the rest of the message if the serverlist is full if( serverlist_cachecount == SERVERLIST_TOTALSIZE ) return false; // also ignore it if we have already queried it (other master server response) for( n = 0 ; n < serverlist_cachecount ; n++ ) if( !strcmp( ipstring, serverlist_cache[ n ].info.cname ) ) break; if( n < serverlist_cachecount ) { // the entry has already been queried once or return true; } if (serverlist_maxcachecount <= n) { serverlist_maxcachecount += 64; serverlist_cache = (serverlist_entry_t *)Mem_Realloc(netconn_mempool, (void *)serverlist_cache, sizeof(serverlist_entry_t) * serverlist_maxcachecount); } entry = &serverlist_cache[n]; memset(entry, 0, sizeof(entry)); entry->protocol = protocol; // store the data the engine cares about (address and ping) strlcpy (entry->info.cname, ipstring, sizeof(entry->info.cname)); entry->info.isfavorite = isfavorite; // no, then reset the ping right away entry->info.ping = -1; // we also want to increase the serverlist_cachecount then serverlist_cachecount++; serverquerycount++; entry->query = SQS_QUERYING; return true; } static void NetConn_ClientParsePacket_ServerList_ParseDPList(lhnetaddress_t *senderaddress, const unsigned char *data, int length, qboolean isextended) { masterreplycount++; if (serverlist_consoleoutput) Con_Printf("received DarkPlaces %sserver list...\n", isextended ? "extended " : ""); while (length >= 7) { char ipstring [128]; // IPv4 address if (data[0] == '\\') { unsigned short port = data[5] * 256 + data[6]; if (port != 0 && (data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF || data[4] != 0xFF)) dpsnprintf (ipstring, sizeof (ipstring), "%u.%u.%u.%u:%hu", data[1], data[2], data[3], data[4], port); // move on to next address in packet data += 7; length -= 7; } // IPv6 address else if (data[0] == '/' && isextended && length >= 19) { unsigned short port = data[17] * 256 + data[18]; if (port != 0) { #ifdef WHY_JUST_WHY const char *ifname; /// \TODO: make some basic checks of the IP address (broadcast, ...) ifname = LHNETADDRESS_GetInterfaceName(senderaddress); if (ifname != NULL) { dpsnprintf (ipstring, sizeof (ipstring), "[%x:%x:%x:%x:%x:%x:%x:%x%%%s]:%hu", (data[1] << 8) | data[2], (data[3] << 8) | data[4], (data[5] << 8) | data[6], (data[7] << 8) | data[8], (data[9] << 8) | data[10], (data[11] << 8) | data[12], (data[13] << 8) | data[14], (data[15] << 8) | data[16], ifname, port); } else #endif { dpsnprintf (ipstring, sizeof (ipstring), "[%x:%x:%x:%x:%x:%x:%x:%x]:%hu", (data[1] << 8) | data[2], (data[3] << 8) | data[4], (data[5] << 8) | data[6], (data[7] << 8) | data[8], (data[9] << 8) | data[10], (data[11] << 8) | data[12], (data[13] << 8) | data[14], (data[15] << 8) | data[16], port); } } // move on to next address in packet data += 19; length -= 19; } else { Con_Print("Error while parsing the server list\n"); break; } if (serverlist_consoleoutput && developer_networking.integer) Con_Printf("Requesting info from DarkPlaces server %s\n", ipstring); if( !NetConn_ClientParsePacket_ServerList_PrepareQuery( PROTOCOL_DARKPLACES7, ipstring, false ) ) { break; } } // begin or resume serverlist queries serverlist_querysleep = false; serverlist_querywaittime = realtime + 3; } static int NetConn_ClientParsePacket(lhnetsocket_t *mysocket, unsigned char *data, int length, lhnetaddress_t *peeraddress) { qboolean fromserver; int ret, c, control; const char *s; char *string, addressstring2[128], ipstring[32]; char stringbuf[16384]; char senddata[NET_HEADERSIZE+NET_MAXMESSAGE+CRYPTO_HEADERSIZE]; size_t sendlength; // quakeworld ingame packet fromserver = cls.netcon && mysocket == cls.netcon->mysocket && !LHNETADDRESS_Compare(&cls.netcon->peeraddress, peeraddress); // convert the address to a string incase we need it LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true); if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255) { // received a command string - strip off the packaging and put it // into our string buffer with NULL termination data += 4; length -= 4; length = min(length, (int)sizeof(stringbuf) - 1); memcpy(stringbuf, data, length); stringbuf[length] = 0; string = stringbuf; if (developer_networking.integer) { Con_Printf("NetConn_ClientParsePacket: %s sent us a command:\n", addressstring2); Com_HexDumpToConsole(data, length); } sendlength = sizeof(senddata) - 4; switch(Crypto_ClientParsePacket(string, length, senddata+4, &sendlength, peeraddress)) { case CRYPTO_NOMATCH: // nothing to do break; case CRYPTO_MATCH: if(sendlength) { memcpy(senddata, "\377\377\377\377", 4); NetConn_Write(mysocket, senddata, sendlength+4, peeraddress); } break; case CRYPTO_DISCARD: if(sendlength) { memcpy(senddata, "\377\377\377\377", 4); NetConn_Write(mysocket, senddata, sendlength+4, peeraddress); } return true; break; case CRYPTO_REPLACE: string = senddata+4; length = sendlength; break; } if (length >= 10 && !memcmp(string, "challenge ", 10) && cls.rcon_trying) { int i = 0, j; for (j = 0;j < MAX_RCONS;j++) { // note: this value from i is used outside the loop too... i = (cls.rcon_ringpos + j) % MAX_RCONS; if(cls.rcon_commands[i][0]) if (!LHNETADDRESS_Compare(peeraddress, &cls.rcon_addresses[i])) break; } if (j < MAX_RCONS) { char buf[1500]; char argbuf[1500]; const char *e; int n; dpsnprintf(argbuf, sizeof(argbuf), "%s %s", string + 10, cls.rcon_commands[i]); memcpy(buf, "\377\377\377\377srcon HMAC-MD4 CHALLENGE ", 29); e = strchr(rcon_password.string, ' '); n = e ? e-rcon_password.string : (int)strlen(rcon_password.string); if(HMAC_MDFOUR_16BYTES((unsigned char *) (buf + 29), (unsigned char *) argbuf, strlen(argbuf), (unsigned char *) rcon_password.string, n)) { int k; buf[45] = ' '; strlcpy(buf + 46, argbuf, sizeof(buf) - 46); NetConn_Write(mysocket, buf, 46 + strlen(buf + 46), peeraddress); cls.rcon_commands[i][0] = 0; --cls.rcon_trying; for (k = 0;k < MAX_RCONS;k++) if(cls.rcon_commands[k][0]) if (!LHNETADDRESS_Compare(peeraddress, &cls.rcon_addresses[k])) break; if(k < MAX_RCONS) { int l; NetConn_WriteString(mysocket, "\377\377\377\377getchallenge", peeraddress); // extend the timeout on other requests as we asked for a challenge for (l = 0;l < MAX_RCONS;l++) if(cls.rcon_commands[l][0]) if (!LHNETADDRESS_Compare(peeraddress, &cls.rcon_addresses[l])) cls.rcon_timeout[l] = realtime + rcon_secure_challengetimeout.value; } return true; // we used up the challenge, so we can't use this oen for connecting now anyway } } } if (length >= 10 && !memcmp(string, "challenge ", 10) && cls.connect_trying) { // darkplaces or quake3 char protocolnames[1400]; Protocol_Names(protocolnames, sizeof(protocolnames)); Con_DPrintf("\"%s\" received, sending connect request back to %s\n", string, addressstring2); M_Update_Return_Reason("Got challenge response"); // update the server IP in the userinfo (QW servers expect this, and it is used by the reconnect command) InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ip", addressstring2); // TODO: add userinfo stuff here instead of using NQ commands? NetConn_WriteString(mysocket, va("\377\377\377\377connect\\protocol\\darkplaces 3\\protocols\\%s%s\\challenge\\%s", protocolnames, cls.connect_userinfo, string + 10), peeraddress); return true; } if (length == 6 && !memcmp(string, "accept", 6) && cls.connect_trying) { // darkplaces or quake3 M_Update_Return_Reason("Accepted"); NetConn_ConnectionEstablished(mysocket, peeraddress, PROTOCOL_DARKPLACES3); return true; } if (length > 7 && !memcmp(string, "reject ", 7) && cls.connect_trying) { char rejectreason[128]; cls.connect_trying = false; string += 7; length = min(length - 7, (int)sizeof(rejectreason) - 1); memcpy(rejectreason, string, length); rejectreason[length] = 0; M_Update_Return_Reason(rejectreason); return true; } if (length >= 15 && !memcmp(string, "statusResponse\x0A", 15)) { serverlist_info_t *info; char *p; int n; string += 15; // search the cache for this server and update it n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2); if (n < 0) return true; info = &serverlist_cache[n].info; info->game[0] = 0; info->mod[0] = 0; info->map[0] = 0; info->name[0] = 0; info->qcstatus[0] = 0; info->players[0] = 0; info->protocol = -1; info->numplayers = 0; info->numbots = -1; info->maxplayers = 0; info->gameversion = 0; p = strchr(string, '\n'); if(p) { *p = 0; // cut off the string there ++p; } else Con_Printf("statusResponse without players block?\n"); if ((s = SearchInfostring(string, "gamename" )) != NULL) strlcpy(info->game, s, sizeof (info->game)); if ((s = SearchInfostring(string, "modname" )) != NULL) strlcpy(info->mod , s, sizeof (info->mod )); if ((s = SearchInfostring(string, "mapname" )) != NULL) strlcpy(info->map , s, sizeof (info->map )); if ((s = SearchInfostring(string, "hostname" )) != NULL) strlcpy(info->name, s, sizeof (info->name)); if ((s = SearchInfostring(string, "protocol" )) != NULL) info->protocol = atoi(s); if ((s = SearchInfostring(string, "clients" )) != NULL) info->numplayers = atoi(s); if ((s = SearchInfostring(string, "bots" )) != NULL) info->numbots = atoi(s); if ((s = SearchInfostring(string, "sv_maxclients")) != NULL) info->maxplayers = atoi(s); if ((s = SearchInfostring(string, "gameversion" )) != NULL) info->gameversion = atoi(s); if ((s = SearchInfostring(string, "qcstatus" )) != NULL) strlcpy(info->qcstatus, s, sizeof(info->qcstatus)); if (p != NULL) strlcpy(info->players, p, sizeof(info->players)); info->numhumans = info->numplayers - max(0, info->numbots); info->freeslots = info->maxplayers - info->numplayers; NetConn_ClientParsePacket_ServerList_UpdateCache(n); return true; } if (length >= 13 && !memcmp(string, "infoResponse\x0A", 13)) { serverlist_info_t *info; int n; string += 13; // search the cache for this server and update it n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2); if (n < 0) return true; info = &serverlist_cache[n].info; info->game[0] = 0; info->mod[0] = 0; info->map[0] = 0; info->name[0] = 0; info->qcstatus[0] = 0; info->players[0] = 0; info->protocol = -1; info->numplayers = 0; info->numbots = -1; info->maxplayers = 0; info->gameversion = 0; if ((s = SearchInfostring(string, "gamename" )) != NULL) strlcpy(info->game, s, sizeof (info->game)); if ((s = SearchInfostring(string, "modname" )) != NULL) strlcpy(info->mod , s, sizeof (info->mod )); if ((s = SearchInfostring(string, "mapname" )) != NULL) strlcpy(info->map , s, sizeof (info->map )); if ((s = SearchInfostring(string, "hostname" )) != NULL) strlcpy(info->name, s, sizeof (info->name)); if ((s = SearchInfostring(string, "protocol" )) != NULL) info->protocol = atoi(s); if ((s = SearchInfostring(string, "clients" )) != NULL) info->numplayers = atoi(s); if ((s = SearchInfostring(string, "bots" )) != NULL) info->numbots = atoi(s); if ((s = SearchInfostring(string, "sv_maxclients")) != NULL) info->maxplayers = atoi(s); if ((s = SearchInfostring(string, "gameversion" )) != NULL) info->gameversion = atoi(s); if ((s = SearchInfostring(string, "qcstatus" )) != NULL) strlcpy(info->qcstatus, s, sizeof(info->qcstatus)); info->numhumans = info->numplayers - max(0, info->numbots); info->freeslots = info->maxplayers - info->numplayers; NetConn_ClientParsePacket_ServerList_UpdateCache(n); return true; } if (!strncmp(string, "getserversResponse\\", 19) && serverlist_cachecount < SERVERLIST_TOTALSIZE) { // Extract the IP addresses data += 18; length -= 18; NetConn_ClientParsePacket_ServerList_ParseDPList(peeraddress, data, length, false); return true; } if (!strncmp(string, "getserversExtResponse", 21) && serverlist_cachecount < SERVERLIST_TOTALSIZE) { // Extract the IP addresses data += 21; length -= 21; NetConn_ClientParsePacket_ServerList_ParseDPList(peeraddress, data, length, true); return true; } if (!memcmp(string, "d\n", 2) && serverlist_cachecount < SERVERLIST_TOTALSIZE) { // Extract the IP addresses data += 2; length -= 2; masterreplycount++; if (serverlist_consoleoutput) Con_Printf("received QuakeWorld server list from %s...\n", addressstring2); while (length >= 6 && (data[0] != 0xFF || data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF) && data[4] * 256 + data[5] != 0) { dpsnprintf (ipstring, sizeof (ipstring), "%u.%u.%u.%u:%u", data[0], data[1], data[2], data[3], data[4] * 256 + data[5]); if (serverlist_consoleoutput && developer_networking.integer) Con_Printf("Requesting info from QuakeWorld server %s\n", ipstring); if( !NetConn_ClientParsePacket_ServerList_PrepareQuery( PROTOCOL_QUAKEWORLD, ipstring, false ) ) { break; } // move on to next address in packet data += 6; length -= 6; } // begin or resume serverlist queries serverlist_querysleep = false; serverlist_querywaittime = realtime + 3; return true; } if (!strncmp(string, "extResponse ", 12)) { ++cl_net_extresponse_count; if(cl_net_extresponse_count > NET_EXTRESPONSE_MAX) cl_net_extresponse_count = NET_EXTRESPONSE_MAX; cl_net_extresponse_last = (cl_net_extresponse_last + 1) % NET_EXTRESPONSE_MAX; dpsnprintf(cl_net_extresponse[cl_net_extresponse_last], sizeof(cl_net_extresponse[cl_net_extresponse_last]), "\"%s\" %s", addressstring2, string + 12); return true; } if (!strncmp(string, "ping", 4)) { if (developer_extra.integer) Con_DPrintf("Received ping from %s, sending ack\n", addressstring2); NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress); return true; } if (!strncmp(string, "ack", 3)) return true; // QuakeWorld compatibility if (length > 1 && string[0] == 'c' && (string[1] == '-' || (string[1] >= '0' && string[1] <= '9')) && cls.connect_trying) { // challenge message Con_Printf("challenge %s received, sending QuakeWorld connect request back to %s\n", string + 1, addressstring2); M_Update_Return_Reason("Got QuakeWorld challenge response"); cls.qw_qport = qport.integer; // update the server IP in the userinfo (QW servers expect this, and it is used by the reconnect command) InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ip", addressstring2); NetConn_WriteString(mysocket, va("\377\377\377\377connect %i %i %i \"%s%s\"\n", 28, cls.qw_qport, atoi(string + 1), cls.userinfo, cls.connect_userinfo), peeraddress); return true; } if (length >= 1 && string[0] == 'j' && cls.connect_trying) { // accept message M_Update_Return_Reason("QuakeWorld Accepted"); NetConn_ConnectionEstablished(mysocket, peeraddress, PROTOCOL_QUAKEWORLD); return true; } if (length > 2 && !memcmp(string, "n\\", 2)) { serverlist_info_t *info; int n; // qw server status if (serverlist_consoleoutput && developer_networking.integer >= 2) Con_Printf("QW server status from server at %s:\n%s\n", addressstring2, string + 1); string += 1; // search the cache for this server and update it n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2); if (n < 0) return true; info = &serverlist_cache[n].info; strlcpy(info->game, "QuakeWorld", sizeof(info->game)); if ((s = SearchInfostring(string, "*gamedir" )) != NULL) strlcpy(info->mod , s, sizeof (info->mod ));else info->mod[0] = 0; if ((s = SearchInfostring(string, "map" )) != NULL) strlcpy(info->map , s, sizeof (info->map ));else info->map[0] = 0; if ((s = SearchInfostring(string, "hostname" )) != NULL) strlcpy(info->name, s, sizeof (info->name));else info->name[0] = 0; info->protocol = 0; info->numplayers = 0; // updated below info->numhumans = 0; // updated below if ((s = SearchInfostring(string, "maxclients" )) != NULL) info->maxplayers = atoi(s);else info->maxplayers = 0; if ((s = SearchInfostring(string, "gameversion" )) != NULL) info->gameversion = atoi(s);else info->gameversion = 0; // count active players on server // (we could gather more info, but we're just after the number) s = strchr(string, '\n'); if (s) { s++; while (s < string + length) { for (;s < string + length && *s != '\n';s++) ; if (s >= string + length) break; info->numplayers++; info->numhumans++; s++; } } NetConn_ClientParsePacket_ServerList_UpdateCache(n); return true; } if (string[0] == 'n') { // qw print command Con_Printf("QW print command from server at %s:\n%s\n", addressstring2, string + 1); } // we may not have liked the packet, but it was a command packet, so // we're done processing this packet now return true; } // quakeworld ingame packet if (fromserver && cls.protocol == PROTOCOL_QUAKEWORLD && length >= 8 && (ret = NetConn_ReceivedMessage(cls.netcon, data, length, cls.protocol, net_messagetimeout.value)) == 2) { ret = 0; CL_ParseServerMessage(); return ret; } // netquake control packets, supported for compatibility only if (length >= 5 && (control = BuffBigLong(data)) && (control & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (control & NETFLAG_LENGTH_MASK) == length && !ENCRYPTION_REQUIRED) { int n; serverlist_info_t *info; data += 4; length -= 4; SZ_Clear(&net_message); SZ_Write(&net_message, data, length); MSG_BeginReading(); c = MSG_ReadByte(); switch (c) { case CCREP_ACCEPT: if (developer_extra.integer) Con_DPrintf("Datagram_ParseConnectionless: received CCREP_ACCEPT from %s.\n", addressstring2); if (cls.connect_trying) { lhnetaddress_t clientportaddress; clientportaddress = *peeraddress; LHNETADDRESS_SetPort(&clientportaddress, MSG_ReadLong()); // extra ProQuake stuff if (length >= 6) cls.proquake_servermod = MSG_ReadByte(); // MOD_PROQUAKE else cls.proquake_servermod = 0; if (length >= 7) cls.proquake_serverversion = MSG_ReadByte(); // version * 10 else cls.proquake_serverversion = 0; if (length >= 8) cls.proquake_serverflags = MSG_ReadByte(); // flags (mainly PQF_CHEATFREE) else cls.proquake_serverflags = 0; if (cls.proquake_servermod == 1) Con_Printf("Connected to ProQuake %.1f server, enabling precise aim\n", cls.proquake_serverversion / 10.0f); // update the server IP in the userinfo (QW servers expect this, and it is used by the reconnect command) InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ip", addressstring2); M_Update_Return_Reason("Accepted"); NetConn_ConnectionEstablished(mysocket, &clientportaddress, PROTOCOL_QUAKE); } break; case CCREP_REJECT: if (developer_extra.integer) Con_DPrintf("Datagram_ParseConnectionless: received CCREP_REJECT from %s.\n", addressstring2); cls.connect_trying = false; M_Update_Return_Reason((char *)MSG_ReadString()); break; case CCREP_SERVER_INFO: if (developer_extra.integer) Con_DPrintf("Datagram_ParseConnectionless: received CCREP_SERVER_INFO from %s.\n", addressstring2); // LordHavoc: because the quake server may report weird addresses // we just ignore it and keep the real address MSG_ReadString(); // search the cache for this server and update it n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2); if (n < 0) break; info = &serverlist_cache[n].info; strlcpy(info->game, "Quake", sizeof(info->game)); strlcpy(info->mod , "", sizeof(info->mod)); // mod name is not specified strlcpy(info->name, MSG_ReadString(), sizeof(info->name)); strlcpy(info->map , MSG_ReadString(), sizeof(info->map)); info->numplayers = MSG_ReadByte(); info->maxplayers = MSG_ReadByte(); info->protocol = MSG_ReadByte(); NetConn_ClientParsePacket_ServerList_UpdateCache(n); break; case CCREP_RCON: // RocketGuy: ProQuake rcon support if (developer_extra.integer) Con_DPrintf("Datagram_ParseConnectionless: received CCREP_RCON from %s.\n", addressstring2); Con_Printf("%s\n", MSG_ReadString()); break; case CCREP_PLAYER_INFO: // we got a CCREP_PLAYER_INFO?? //if (developer_extra.integer) Con_Printf("Datagram_ParseConnectionless: received CCREP_PLAYER_INFO from %s.\n", addressstring2); break; case CCREP_RULE_INFO: // we got a CCREP_RULE_INFO?? //if (developer_extra.integer) Con_Printf("Datagram_ParseConnectionless: received CCREP_RULE_INFO from %s.\n", addressstring2); break; default: break; } SZ_Clear(&net_message); // we may not have liked the packet, but it was a valid control // packet, so we're done processing this packet now return true; } ret = 0; if (fromserver && length >= (int)NET_HEADERSIZE && (ret = NetConn_ReceivedMessage(cls.netcon, data, length, cls.protocol, net_messagetimeout.value)) == 2) CL_ParseServerMessage(); return ret; } void NetConn_QueryQueueFrame(void) { int index; int queries; int maxqueries; double timeouttime; static double querycounter = 0; if(!net_slist_pause.integer && serverlist_paused) ServerList_RebuildViewList(); serverlist_paused = net_slist_pause.integer != 0; if (serverlist_querysleep) return; // apply a cool down time after master server replies, // to avoid messing up the ping times on the servers if (serverlist_querywaittime > realtime) return; // each time querycounter reaches 1.0 issue a query querycounter += cl.realframetime * net_slist_queriespersecond.value; maxqueries = (int)querycounter; maxqueries = bound(0, maxqueries, net_slist_queriesperframe.integer); querycounter -= maxqueries; if( maxqueries == 0 ) { return; } // scan serverlist and issue queries as needed serverlist_querysleep = true; timeouttime = realtime - net_slist_timeout.value; for( index = 0, queries = 0 ; index < serverlist_cachecount && queries < maxqueries ; index++ ) { serverlist_entry_t *entry = &serverlist_cache[ index ]; if( entry->query != SQS_QUERYING && entry->query != SQS_REFRESHING ) { continue; } serverlist_querysleep = false; if( entry->querycounter != 0 && entry->querytime > timeouttime ) { continue; } if( entry->querycounter != (unsigned) net_slist_maxtries.integer ) { lhnetaddress_t address; int socket; LHNETADDRESS_FromString(&address, entry->info.cname, 0); if (entry->protocol == PROTOCOL_QUAKEWORLD) { for (socket = 0; socket < cl_numsockets ; socket++) NetConn_WriteString(cl_sockets[socket], "\377\377\377\377status\n", &address); } else { for (socket = 0; socket < cl_numsockets ; socket++) NetConn_WriteString(cl_sockets[socket], "\377\377\377\377getstatus", &address); } // update the entry fields entry->querytime = realtime; entry->querycounter++; // if not in the slist menu we should print the server to console if (serverlist_consoleoutput) Con_Printf("querying %25s (%i. try)\n", entry->info.cname, entry->querycounter); queries++; } else { // have we tried to refresh this server? if( entry->query == SQS_REFRESHING ) { // yes, so update the reply count (since its not responding anymore) serverreplycount--; if(!serverlist_paused) ServerList_ViewList_Remove(entry); } entry->query = SQS_TIMEDOUT; } } } void NetConn_ClientFrame(void) { int i, length; lhnetaddress_t peeraddress; NetConn_UpdateSockets(); if (cls.connect_trying && cls.connect_nextsendtime < realtime) { if (cls.connect_remainingtries == 0) M_Update_Return_Reason("Connect: Waiting 10 seconds for reply"); cls.connect_nextsendtime = realtime + 1; cls.connect_remainingtries--; if (cls.connect_remainingtries <= -10) { cls.connect_trying = false; M_Update_Return_Reason("Connect: Failed"); return; } // try challenge first (newer DP server or QW) NetConn_WriteString(cls.connect_mysocket, "\377\377\377\377getchallenge", &cls.connect_address); // then try netquake as a fallback (old server, or netquake) SZ_Clear(&net_message); // save space for the header, filled in later MSG_WriteLong(&net_message, 0); MSG_WriteByte(&net_message, CCREQ_CONNECT); MSG_WriteString(&net_message, "QUAKE"); MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION); // extended proquake stuff MSG_WriteByte(&net_message, 1); // mod = MOD_PROQUAKE // this version matches ProQuake 3.40, the first version to support // the NAT fix, and it only supports the NAT fix for ProQuake 3.40 or // higher clients, so we pretend we are that version... MSG_WriteByte(&net_message, 34); // version * 10 MSG_WriteByte(&net_message, 0); // flags MSG_WriteLong(&net_message, 0); // password // write the packetsize now... StoreBigLong(net_message.data, NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK)); NetConn_Write(cls.connect_mysocket, net_message.data, net_message.cursize, &cls.connect_address); SZ_Clear(&net_message); } for (i = 0;i < cl_numsockets;i++) { while (cl_sockets[i] && (length = NetConn_Read(cl_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0) { // R_TimeReport("clientreadnetwork"); NetConn_ClientParsePacket(cl_sockets[i], readbuffer, length, &peeraddress); // R_TimeReport("clientparsepacket"); } } NetConn_QueryQueueFrame(); if (cls.netcon && realtime > cls.netcon->timeout && !sv.active) { Con_Print("Connection timed out\n"); CL_Disconnect(); Host_ShutdownServer (); } } static void NetConn_BuildChallengeString(char *buffer, int bufferlength) { int i; char c; for (i = 0;i < bufferlength - 1;i++) { do { c = rand () % (127 - 33) + 33; } while (c == '\\' || c == ';' || c == '"' || c == '%' || c == '/'); buffer[i] = c; } buffer[i] = 0; } /// (div0) build the full response only if possible; better a getinfo response than no response at all if getstatus won't fit static qboolean NetConn_BuildStatusResponse(const char* challenge, char* out_msg, size_t out_size, qboolean fullstatus) { char qcstatus[256]; unsigned int nb_clients = 0, nb_bots = 0, i; int length; char teambuf[3]; const char *crypto_idstring; const char *str; SV_VM_Begin(); // How many clients are there? for (i = 0;i < (unsigned int)svs.maxclients;i++) { if (svs.clients[i].active) { nb_clients++; if (!svs.clients[i].netconnection) nb_bots++; } } *qcstatus = 0; str = PRVM_GetString(PRVM_serverglobalstring(worldstatus)); if(str && *str) { char *p; const char *q; p = qcstatus; for(q = str; *q && p - qcstatus < (ptrdiff_t)(sizeof(qcstatus)) - 1; ++q) if(*q != '\\' && *q != '\n') *p++ = *q; *p = 0; } /// \TODO: we should add more information for the full status string crypto_idstring = Crypto_GetInfoResponseDataString(); length = dpsnprintf(out_msg, out_size, "\377\377\377\377%s\x0A" "\\gamename\\%s\\modname\\%s\\gameversion\\%d\\sv_maxclients\\%d" "\\clients\\%d\\bots\\%d\\mapname\\%s\\hostname\\%s\\protocol\\%d" "%s%s" "%s%s" "%s%s" "%s", fullstatus ? "statusResponse" : "infoResponse", gamename, com_modname, gameversion.integer, svs.maxclients, nb_clients, nb_bots, sv.worldbasename, hostname.string, NET_PROTOCOL_VERSION, *qcstatus ? "\\qcstatus\\" : "", qcstatus, challenge ? "\\challenge\\" : "", challenge ? challenge : "", crypto_idstring ? "\\d0_blind_id\\" : "", crypto_idstring ? crypto_idstring : "", fullstatus ? "\n" : ""); // Make sure it fits in the buffer if (length < 0) goto bad; if (fullstatus) { char *ptr; int left; int savelength; savelength = length; ptr = out_msg + length; left = (int)out_size - length; for (i = 0;i < (unsigned int)svs.maxclients;i++) { client_t *cl = &svs.clients[i]; if (cl->active) { int nameind, cleanind, pingvalue; char curchar; char cleanname [sizeof(cl->name)]; const char *str; prvm_edict_t *ed; // Remove all characters '"' and '\' in the player name nameind = 0; cleanind = 0; do { curchar = cl->name[nameind++]; if (curchar != '"' && curchar != '\\') { cleanname[cleanind++] = curchar; if (cleanind == sizeof(cleanname) - 1) break; } } while (curchar != '\0'); cleanname[cleanind] = 0; // cleanind is always a valid index even at this point pingvalue = (int)(cl->ping * 1000.0f); if(cl->netconnection) pingvalue = bound(1, pingvalue, 9999); else pingvalue = 0; *qcstatus = 0; ed = PRVM_EDICT_NUM(i + 1); str = PRVM_GetString(PRVM_serveredictstring(ed, clientstatus)); if(str && *str) { char *p; const char *q; p = qcstatus; for(q = str; *q && p != qcstatus + sizeof(qcstatus) - 1; ++q) if(*q != '\\' && *q != '"' && !ISWHITESPACE(*q)) *p++ = *q; *p = 0; } if ((gamemode == GAME_NEXUIZ || gamemode == GAME_XONOTIC) && (teamplay.integer > 0)) { if(cl->frags == -666) // spectator strlcpy(teambuf, " 0", sizeof(teambuf)); else if(cl->colors == 0x44) // red team strlcpy(teambuf, " 1", sizeof(teambuf)); else if(cl->colors == 0xDD) // blue team strlcpy(teambuf, " 2", sizeof(teambuf)); else if(cl->colors == 0xCC) // yellow team strlcpy(teambuf, " 3", sizeof(teambuf)); else if(cl->colors == 0x99) // pink team strlcpy(teambuf, " 4", sizeof(teambuf)); else strlcpy(teambuf, " 0", sizeof(teambuf)); } else *teambuf = 0; // note: team number is inserted according to SoF2 protocol if(*qcstatus) length = dpsnprintf(ptr, left, "%s %d%s \"%s\"\n", qcstatus, pingvalue, teambuf, cleanname); else length = dpsnprintf(ptr, left, "%d %d%s \"%s\"\n", cl->frags, pingvalue, teambuf, cleanname); if(length < 0) { // out of space? // turn it into an infoResponse! out_msg[savelength] = 0; memcpy(out_msg + 4, "infoResponse\x0A", 13); memmove(out_msg + 17, out_msg + 19, savelength - 19); break; } left -= length; ptr += length; } } } SV_VM_End(); return true; bad: SV_VM_End(); return false; } static qboolean NetConn_PreventConnectFlood(lhnetaddress_t *peeraddress) { int floodslotnum, bestfloodslotnum; double bestfloodtime; lhnetaddress_t noportpeeraddress; // see if this is a connect flood noportpeeraddress = *peeraddress; LHNETADDRESS_SetPort(&noportpeeraddress, 0); bestfloodslotnum = 0; bestfloodtime = sv.connectfloodaddresses[bestfloodslotnum].lasttime; for (floodslotnum = 0;floodslotnum < MAX_CONNECTFLOODADDRESSES;floodslotnum++) { if (bestfloodtime >= sv.connectfloodaddresses[floodslotnum].lasttime) { bestfloodtime = sv.connectfloodaddresses[floodslotnum].lasttime; bestfloodslotnum = floodslotnum; } if (sv.connectfloodaddresses[floodslotnum].lasttime && LHNETADDRESS_Compare(&noportpeeraddress, &sv.connectfloodaddresses[floodslotnum].address) == 0) { // this address matches an ongoing flood address if (realtime < sv.connectfloodaddresses[floodslotnum].lasttime + net_connectfloodblockingtimeout.value) { // renew the ban on this address so it does not expire // until the flood has subsided sv.connectfloodaddresses[floodslotnum].lasttime = realtime; //Con_Printf("Flood detected!\n"); return true; } // the flood appears to have subsided, so allow this bestfloodslotnum = floodslotnum; // reuse the same slot break; } } // begin a new timeout on this address sv.connectfloodaddresses[bestfloodslotnum].address = noportpeeraddress; sv.connectfloodaddresses[bestfloodslotnum].lasttime = realtime; //Con_Printf("Flood detection initiated!\n"); return false; } void NetConn_ClearConnectFlood(lhnetaddress_t *peeraddress) { int floodslotnum; lhnetaddress_t noportpeeraddress; // see if this is a connect flood noportpeeraddress = *peeraddress; LHNETADDRESS_SetPort(&noportpeeraddress, 0); for (floodslotnum = 0;floodslotnum < MAX_CONNECTFLOODADDRESSES;floodslotnum++) { if (sv.connectfloodaddresses[floodslotnum].lasttime && LHNETADDRESS_Compare(&noportpeeraddress, &sv.connectfloodaddresses[floodslotnum].address) == 0) { // this address matches an ongoing flood address // remove the ban sv.connectfloodaddresses[floodslotnum].address.addresstype = LHNETADDRESSTYPE_NONE; sv.connectfloodaddresses[floodslotnum].lasttime = 0; //Con_Printf("Flood cleared!\n"); } } } typedef qboolean (*rcon_matchfunc_t) (lhnetaddress_t *peeraddress, const char *password, const char *hash, const char *s, int slen); qboolean hmac_mdfour_time_matching(lhnetaddress_t *peeraddress, const char *password, const char *hash, const char *s, int slen) { char mdfourbuf[16]; long t1, t2; t1 = (long) time(NULL); t2 = strtol(s, NULL, 0); if(abs(t1 - t2) > rcon_secure_maxdiff.integer) return false; if(!HMAC_MDFOUR_16BYTES((unsigned char *) mdfourbuf, (unsigned char *) s, slen, (unsigned char *) password, strlen(password))) return false; return !memcmp(mdfourbuf, hash, 16); } qboolean hmac_mdfour_challenge_matching(lhnetaddress_t *peeraddress, const char *password, const char *hash, const char *s, int slen) { char mdfourbuf[16]; int i; if(slen < (int)(sizeof(challenge[0].string)) - 1) return false; // validate the challenge for (i = 0;i < MAX_CHALLENGES;i++) if(challenge[i].time > 0) if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address) && !strncmp(challenge[i].string, s, sizeof(challenge[0].string) - 1)) break; // if the challenge is not recognized, drop the packet if (i == MAX_CHALLENGES) return false; if(!HMAC_MDFOUR_16BYTES((unsigned char *) mdfourbuf, (unsigned char *) s, slen, (unsigned char *) password, strlen(password))) return false; if(memcmp(mdfourbuf, hash, 16)) return false; // unmark challenge to prevent replay attacks challenge[i].time = 0; return true; } qboolean plaintext_matching(lhnetaddress_t *peeraddress, const char *password, const char *hash, const char *s, int slen) { return !strcmp(password, hash); } /// returns a string describing the user level, or NULL for auth failure 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) { const char *text, *userpass_start, *userpass_end, *userpass_startpass; static char buf[MAX_INPUTLINE]; qboolean hasquotes; qboolean restricted = false; qboolean have_usernames = false; userpass_start = rcon_password.string; while((userpass_end = strchr(userpass_start, ' '))) { have_usernames = true; strlcpy(buf, userpass_start, ((size_t)(userpass_end-userpass_start) >= sizeof(buf)) ? (int)(sizeof(buf)) : (int)(userpass_end-userpass_start+1)); if(buf[0]) if(comparator(peeraddress, buf, password, cs, cslen)) goto allow; userpass_start = userpass_end + 1; } if(userpass_start[0]) { userpass_end = userpass_start + strlen(userpass_start); if(comparator(peeraddress, userpass_start, password, cs, cslen)) goto allow; } restricted = true; have_usernames = false; userpass_start = rcon_restricted_password.string; while((userpass_end = strchr(userpass_start, ' '))) { have_usernames = true; strlcpy(buf, userpass_start, ((size_t)(userpass_end-userpass_start) >= sizeof(buf)) ? (int)(sizeof(buf)) : (int)(userpass_end-userpass_start+1)); if(buf[0]) if(comparator(peeraddress, buf, password, cs, cslen)) goto check; userpass_start = userpass_end + 1; } if(userpass_start[0]) { userpass_end = userpass_start + strlen(userpass_start); if(comparator(peeraddress, userpass_start, password, cs, cslen)) goto check; } return NULL; // DENIED check: for(text = s; text != endpos; ++text) if((signed char) *text > 0 && ((signed char) *text < (signed char) ' ' || *text == ';')) return NULL; // block possible exploits against the parser/alias expansion while(s != endpos) { size_t l = strlen(s); if(l) { hasquotes = (strchr(s, '"') != NULL); // sorry, we can't allow these substrings in wildcard expressions, // as they can mess with the argument counts text = rcon_restricted_commands.string; while(COM_ParseToken_Console(&text)) { // com_token now contains a pattern to check for... if(strchr(com_token, '*') || strchr(com_token, '?')) // wildcard expression, * can only match a SINGLE argument { if(!hasquotes) if(matchpattern_with_separator(s, com_token, true, " ", true)) // note how we excluded tab, newline etc. above goto match; } else if(strchr(com_token, ' ')) // multi-arg expression? must match in whole { if(!strcmp(com_token, s)) goto match; } else // single-arg expression? must match the beginning of the command { if(!strcmp(com_token, s)) goto match; if(!memcmp(va("%s ", com_token), s, strlen(com_token) + 1)) goto match; } } // if we got here, nothing matched! return NULL; } match: s += l + 1; } allow: userpass_startpass = strchr(userpass_start, ':'); if(have_usernames && userpass_startpass && userpass_startpass < userpass_end) return va("%srcon (username %.*s)", restricted ? "restricted " : "", (int)(userpass_startpass-userpass_start), userpass_start); return va("%srcon", restricted ? "restricted " : ""); } void RCon_Execute(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress, const char *addressstring2, const char *userlevel, const char *s, const char *endpos, qboolean proquakeprotocol) { if(userlevel) { // looks like a legitimate rcon command with the correct password const char *s_ptr = s; Con_Printf("server received %s command from %s: ", userlevel, host_client ? host_client->name : addressstring2); while(s_ptr != endpos) { size_t l = strlen(s_ptr); if(l) Con_Printf(" %s;", s_ptr); s_ptr += l + 1; } Con_Printf("\n"); if (!host_client || !host_client->netconnection || LHNETADDRESS_GetAddressType(&host_client->netconnection->peeraddress) != LHNETADDRESSTYPE_LOOP) Con_Rcon_Redirect_Init(mysocket, peeraddress, proquakeprotocol); while(s != endpos) { size_t l = strlen(s); if(l) { client_t *host_client_save = host_client; Cmd_ExecuteString(s, src_command); host_client = host_client_save; // in case it is a command that changes host_client (like restart) } s += l + 1; } Con_Rcon_Redirect_End(); } else { Con_Printf("server denied rcon access to %s\n", host_client ? host_client->name : addressstring2); } } extern void SV_SendServerinfo (client_t *client); static int NetConn_ServerParsePacket(lhnetsocket_t *mysocket, unsigned char *data, int length, lhnetaddress_t *peeraddress) { int i, ret, clientnum, best; double besttime; client_t *client; char *s, *string, response[1400], addressstring2[128]; static char stringbuf[16384]; qboolean islocal = (LHNETADDRESS_GetAddressType(peeraddress) == LHNETADDRESSTYPE_LOOP); char senddata[NET_HEADERSIZE+NET_MAXMESSAGE+CRYPTO_HEADERSIZE]; size_t sendlength, response_len; if (!sv.active) return false; // convert the address to a string incase we need it LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true); // see if we can identify the sender as a local player // (this is necessary for rcon to send a reliable reply if the client is // actually on the server, not sending remotely) for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++) if (host_client->netconnection && host_client->netconnection->mysocket == mysocket && !LHNETADDRESS_Compare(&host_client->netconnection->peeraddress, peeraddress)) break; if (i == svs.maxclients) host_client = NULL; if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255) { // received a command string - strip off the packaging and put it // into our string buffer with NULL termination data += 4; length -= 4; length = min(length, (int)sizeof(stringbuf) - 1); memcpy(stringbuf, data, length); stringbuf[length] = 0; string = stringbuf; if (developer_extra.integer) { Con_Printf("NetConn_ServerParsePacket: %s sent us a command:\n", addressstring2); Com_HexDumpToConsole(data, length); } sendlength = sizeof(senddata) - 4; switch(Crypto_ServerParsePacket(string, length, senddata+4, &sendlength, peeraddress)) { case CRYPTO_NOMATCH: // nothing to do break; case CRYPTO_MATCH: if(sendlength) { memcpy(senddata, "\377\377\377\377", 4); NetConn_Write(mysocket, senddata, sendlength+4, peeraddress); } break; case CRYPTO_DISCARD: if(sendlength) { memcpy(senddata, "\377\377\377\377", 4); NetConn_Write(mysocket, senddata, sendlength+4, peeraddress); } return true; break; case CRYPTO_REPLACE: string = senddata+4; length = sendlength; break; } if (length >= 12 && !memcmp(string, "getchallenge", 12) && (islocal || sv_public.integer > -3)) { for (i = 0, best = 0, besttime = realtime;i < MAX_CHALLENGES;i++) { if(challenge[i].time > 0) if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address)) break; if (besttime > challenge[i].time) besttime = challenge[best = i].time; } // if we did not find an exact match, choose the oldest and // update address and string if (i == MAX_CHALLENGES) { i = best; challenge[i].address = *peeraddress; NetConn_BuildChallengeString(challenge[i].string, sizeof(challenge[i].string)); } challenge[i].time = realtime; // send the challenge dpsnprintf(response, sizeof(response), "\377\377\377\377challenge %s", challenge[i].string); response_len = strlen(response) + 1; Crypto_ServerAppendToChallenge(string, length, response, &response_len, sizeof(response)); NetConn_Write(mysocket, response, response_len, peeraddress); return true; } if (length > 8 && !memcmp(string, "connect\\", 8)) { crypto_t *crypto = Crypto_ServerGetInstance(peeraddress); string += 7; length -= 7; if(crypto && crypto->authenticated) { // no need to check challenge if(crypto_developer.integer) { Con_Printf("%s connection to %s is being established: client is %s@%.*s, I am %.*s@%.*s\n", crypto->use_aes ? "Encrypted" : "Authenticated", addressstring2, crypto->client_idfp[0] ? crypto->client_idfp : "-", crypto_keyfp_recommended_length, crypto->client_keyfp[0] ? crypto->client_keyfp : "-", crypto_keyfp_recommended_length, crypto->server_idfp[0] ? crypto->server_idfp : "-", crypto_keyfp_recommended_length, crypto->server_keyfp[0] ? crypto->server_keyfp : "-" ); } } else { if ((s = SearchInfostring(string, "challenge"))) { // validate the challenge for (i = 0;i < MAX_CHALLENGES;i++) if(challenge[i].time > 0) if (!LHNETADDRESS_Compare(peeraddress, &challenge[i].address) && !strcmp(challenge[i].string, s)) break; // if the challenge is not recognized, drop the packet if (i == MAX_CHALLENGES) return true; } } if((s = SearchInfostring(string, "message"))) Con_DPrintf("Connecting client %s sent us the message: %s\n", addressstring2, s); if(!(islocal || sv_public.integer > -2)) { if (developer_extra.integer) Con_Printf("Datagram_ParseConnectionless: sending \"reject %s\" to %s.\n", sv_public_rejectreason.string, addressstring2); NetConn_WriteString(mysocket, va("\377\377\377\377reject %s", sv_public_rejectreason.string), peeraddress); return true; } // check engine protocol if(!(s = SearchInfostring(string, "protocol")) || strcmp(s, "darkplaces 3")) { if (developer_extra.integer) Con_Printf("Datagram_ParseConnectionless: sending \"reject Wrong game protocol.\" to %s.\n", addressstring2); NetConn_WriteString(mysocket, "\377\377\377\377reject Wrong game protocol.", peeraddress); return true; } // see if this is a duplicate connection request or a disconnected // client who is rejoining to the same client slot for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++) { if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0) { // this is a known client... if(crypto && crypto->authenticated) { // reject if changing key! if(client->netconnection->crypto.authenticated) { if( strcmp(client->netconnection->crypto.client_idfp, crypto->client_idfp) || strcmp(client->netconnection->crypto.server_idfp, crypto->server_idfp) || strcmp(client->netconnection->crypto.client_keyfp, crypto->client_keyfp) || strcmp(client->netconnection->crypto.server_keyfp, crypto->server_keyfp) ) { if (developer_extra.integer) Con_Printf("Datagram_ParseConnectionless: sending \"reject Attempt to change key of crypto.\" to %s.\n", addressstring2); NetConn_WriteString(mysocket, "\377\377\377\377reject Attempt to change key of crypto.", peeraddress); return true; } } } else { // reject if downgrading! if(client->netconnection->crypto.authenticated) { if (developer_extra.integer) Con_Printf("Datagram_ParseConnectionless: sending \"reject Attempt to downgrade crypto.\" to %s.\n", addressstring2); NetConn_WriteString(mysocket, "\377\377\377\377reject Attempt to downgrade crypto.", peeraddress); return true; } } if (client->spawned) { // client crashed and is coming back, // keep their stuff intact if (developer_extra.integer) Con_Printf("Datagram_ParseConnectionless: sending \"accept\" to %s.\n", addressstring2); NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress); if(crypto && crypto->authenticated) Crypto_ServerFinishInstance(&client->netconnection->crypto, crypto); SV_VM_Begin(); SV_SendServerinfo(client); SV_VM_End(); } else { // client is still trying to connect, // so we send a duplicate reply if (developer_extra.integer) Con_Printf("Datagram_ParseConnectionless: sending duplicate accept to %s.\n", addressstring2); if(crypto && crypto->authenticated) Crypto_ServerFinishInstance(&client->netconnection->crypto, crypto); NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress); } return true; } } if (NetConn_PreventConnectFlood(peeraddress)) return true; // find an empty client slot for this new client for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++) { netconn_t *conn; if (!client->active && (conn = NetConn_Open(mysocket, peeraddress))) { // allocated connection if (developer_extra.integer) Con_Printf("Datagram_ParseConnectionless: sending \"accept\" to %s.\n", conn->address); NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress); // now set up the client if(crypto && crypto->authenticated) Crypto_ServerFinishInstance(&conn->crypto, crypto); SV_VM_Begin(); SV_ConnectClient(clientnum, conn); SV_VM_End(); NetConn_Heartbeat(1); return true; } } // no empty slots found - server is full if (developer_extra.integer) Con_Printf("Datagram_ParseConnectionless: sending \"reject Server is full.\" to %s.\n", addressstring2); NetConn_WriteString(mysocket, "\377\377\377\377reject Server is full.", peeraddress); return true; } if (length >= 7 && !memcmp(string, "getinfo", 7) && (islocal || sv_public.integer > -1)) { const char *challenge = NULL; // If there was a challenge in the getinfo message if (length > 8 && string[7] == ' ') challenge = string + 8; if (NetConn_BuildStatusResponse(challenge, response, sizeof(response), false)) { if (developer_extra.integer) Con_DPrintf("Sending reply to master %s - %s\n", addressstring2, response); NetConn_WriteString(mysocket, response, peeraddress); } return true; } if (length >= 9 && !memcmp(string, "getstatus", 9) && (islocal || sv_public.integer > -1)) { const char *challenge = NULL; // If there was a challenge in the getinfo message if (length > 10 && string[9] == ' ') challenge = string + 10; if (NetConn_BuildStatusResponse(challenge, response, sizeof(response), true)) { if (developer_extra.integer) Con_DPrintf("Sending reply to client %s - %s\n", addressstring2, response); NetConn_WriteString(mysocket, response, peeraddress); } return true; } if (length >= 37 && !memcmp(string, "srcon HMAC-MD4 TIME ", 20)) { char *password = string + 20; char *timeval = string + 37; char *s = strchr(timeval, ' '); char *endpos = string + length + 1; // one behind the NUL, so adding strlen+1 will eventually reach it const char *userlevel; if(rcon_secure.integer > 1) return true; if(!s) return true; // invalid packet ++s; userlevel = RCon_Authenticate(peeraddress, password, s, endpos, hmac_mdfour_time_matching, timeval, endpos - timeval - 1); // not including the appended \0 into the HMAC RCon_Execute(mysocket, peeraddress, addressstring2, userlevel, s, endpos, false); return true; } if (length >= 42 && !memcmp(string, "srcon HMAC-MD4 CHALLENGE ", 25)) { char *password = string + 25; char *challenge = string + 42; char *s = strchr(challenge, ' '); char *endpos = string + length + 1; // one behind the NUL, so adding strlen+1 will eventually reach it const char *userlevel; if(!s) return true; // invalid packet ++s; userlevel = RCon_Authenticate(peeraddress, password, s, endpos, hmac_mdfour_challenge_matching, challenge, endpos - challenge - 1); // not including the appended \0 into the HMAC RCon_Execute(mysocket, peeraddress, addressstring2, userlevel, s, endpos, false); return true; } if (length >= 5 && !memcmp(string, "rcon ", 5)) { int i; char *s = string + 5; char *endpos = string + length + 1; // one behind the NUL, so adding strlen+1 will eventually reach it char password[64]; if(rcon_secure.integer > 0) return true; for (i = 0;!ISWHITESPACE(*s);s++) if (i < (int)sizeof(password) - 1) password[i++] = *s; if(ISWHITESPACE(*s) && s != endpos) // skip leading ugly space ++s; password[i] = 0; if (!ISWHITESPACE(password[0])) { const char *userlevel = RCon_Authenticate(peeraddress, password, s, endpos, plaintext_matching, NULL, 0); RCon_Execute(mysocket, peeraddress, addressstring2, userlevel, s, endpos, false); } return true; } if (!strncmp(string, "extResponse ", 12)) { ++sv_net_extresponse_count; if(sv_net_extresponse_count > NET_EXTRESPONSE_MAX) sv_net_extresponse_count = NET_EXTRESPONSE_MAX; sv_net_extresponse_last = (sv_net_extresponse_last + 1) % NET_EXTRESPONSE_MAX; dpsnprintf(sv_net_extresponse[sv_net_extresponse_last], sizeof(sv_net_extresponse[sv_net_extresponse_last]), "'%s' %s", addressstring2, string + 12); return true; } if (!strncmp(string, "ping", 4)) { if (developer_extra.integer) Con_DPrintf("Received ping from %s, sending ack\n", addressstring2); NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress); return true; } if (!strncmp(string, "ack", 3)) return true; // we may not have liked the packet, but it was a command packet, so // we're done processing this packet now return true; } // netquake control packets, supported for compatibility only, and only // when running game protocols that are normally served via this connection // protocol // (this protects more modern protocols against being used for // Quake packet flood Denial Of Service attacks) 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) { int c; int protocolnumber; const char *protocolname; data += 4; length -= 4; SZ_Clear(&net_message); SZ_Write(&net_message, data, length); MSG_BeginReading(); c = MSG_ReadByte(); switch (c) { case CCREQ_CONNECT: if (developer_extra.integer) Con_DPrintf("Datagram_ParseConnectionless: received CCREQ_CONNECT from %s.\n", addressstring2); if(!(islocal || sv_public.integer > -2)) { if (developer_extra.integer) Con_DPrintf("Datagram_ParseConnectionless: sending CCREP_REJECT \"%s\" to %s.\n", sv_public_rejectreason.string, addressstring2); SZ_Clear(&net_message); // save space for the header, filled in later MSG_WriteLong(&net_message, 0); MSG_WriteByte(&net_message, CCREP_REJECT); MSG_WriteString(&net_message, va("%s\n", sv_public_rejectreason.string)); StoreBigLong(net_message.data, NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK)); NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress); SZ_Clear(&net_message); break; } protocolname = MSG_ReadString(); protocolnumber = MSG_ReadByte(); if (strcmp(protocolname, "QUAKE") || protocolnumber != NET_PROTOCOL_VERSION) { if (developer_extra.integer) Con_DPrintf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Incompatible version.\" to %s.\n", addressstring2); SZ_Clear(&net_message); // save space for the header, filled in later MSG_WriteLong(&net_message, 0); MSG_WriteByte(&net_message, CCREP_REJECT); MSG_WriteString(&net_message, "Incompatible version.\n"); StoreBigLong(net_message.data, NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK)); NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress); SZ_Clear(&net_message); break; } // see if this connect request comes from a known client for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++) { if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0) { // this is either a duplicate connection request // or coming back from a timeout // (if so, keep their stuff intact) // send a reply if (developer_extra.integer) Con_DPrintf("Datagram_ParseConnectionless: sending duplicate CCREP_ACCEPT to %s.\n", addressstring2); SZ_Clear(&net_message); // save space for the header, filled in later MSG_WriteLong(&net_message, 0); MSG_WriteByte(&net_message, CCREP_ACCEPT); MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(client->netconnection->mysocket))); StoreBigLong(net_message.data, NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK)); NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress); SZ_Clear(&net_message); // if client is already spawned, re-send the // serverinfo message as they'll need it to play if (client->spawned) { SV_VM_Begin(); SV_SendServerinfo(client); SV_VM_End(); } return true; } } // this is a new client, check for connection flood if (NetConn_PreventConnectFlood(peeraddress)) break; // find a slot for the new client for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++) { netconn_t *conn; if (!client->active && (client->netconnection = conn = NetConn_Open(mysocket, peeraddress)) != NULL) { // connect to the client // everything is allocated, just fill in the details strlcpy (conn->address, addressstring2, sizeof (conn->address)); if (developer_extra.integer) Con_DPrintf("Datagram_ParseConnectionless: sending CCREP_ACCEPT to %s.\n", addressstring2); // send back the info about the server connection SZ_Clear(&net_message); // save space for the header, filled in later MSG_WriteLong(&net_message, 0); MSG_WriteByte(&net_message, CCREP_ACCEPT); MSG_WriteLong(&net_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(conn->mysocket))); StoreBigLong(net_message.data, NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK)); NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress); SZ_Clear(&net_message); // now set up the client struct SV_VM_Begin(); SV_ConnectClient(clientnum, conn); SV_VM_End(); NetConn_Heartbeat(1); return true; } } if (developer_extra.integer) Con_DPrintf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Server is full.\" to %s.\n", addressstring2); // no room; try to let player know SZ_Clear(&net_message); // save space for the header, filled in later MSG_WriteLong(&net_message, 0); MSG_WriteByte(&net_message, CCREP_REJECT); MSG_WriteString(&net_message, "Server is full.\n"); StoreBigLong(net_message.data, NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK)); NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress); SZ_Clear(&net_message); break; case CCREQ_SERVER_INFO: if (developer_extra.integer) Con_DPrintf("Datagram_ParseConnectionless: received CCREQ_SERVER_INFO from %s.\n", addressstring2); if(!(islocal || sv_public.integer > -1)) break; if (sv.active && !strcmp(MSG_ReadString(), "QUAKE")) { int numclients; char myaddressstring[128]; if (developer_extra.integer) Con_DPrintf("Datagram_ParseConnectionless: sending CCREP_SERVER_INFO to %s.\n", addressstring2); SZ_Clear(&net_message); // save space for the header, filled in later MSG_WriteLong(&net_message, 0); MSG_WriteByte(&net_message, CCREP_SERVER_INFO); LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), myaddressstring, sizeof(myaddressstring), true); MSG_WriteString(&net_message, myaddressstring); MSG_WriteString(&net_message, hostname.string); MSG_WriteString(&net_message, sv.name); // How many clients are there? for (i = 0, numclients = 0;i < svs.maxclients;i++) if (svs.clients[i].active) numclients++; MSG_WriteByte(&net_message, numclients); MSG_WriteByte(&net_message, svs.maxclients); MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION); StoreBigLong(net_message.data, NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK)); NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress); SZ_Clear(&net_message); } break; case CCREQ_PLAYER_INFO: if (developer_extra.integer) Con_DPrintf("Datagram_ParseConnectionless: received CCREQ_PLAYER_INFO from %s.\n", addressstring2); if(!(islocal || sv_public.integer > -1)) break; if (sv.active) { int playerNumber, activeNumber, clientNumber; client_t *client; playerNumber = MSG_ReadByte(); activeNumber = -1; for (clientNumber = 0, client = svs.clients; clientNumber < svs.maxclients; clientNumber++, client++) if (client->active && ++activeNumber == playerNumber) break; if (clientNumber != svs.maxclients) { SZ_Clear(&net_message); // save space for the header, filled in later MSG_WriteLong(&net_message, 0); MSG_WriteByte(&net_message, CCREP_PLAYER_INFO); MSG_WriteByte(&net_message, playerNumber); MSG_WriteString(&net_message, client->name); MSG_WriteLong(&net_message, client->colors); MSG_WriteLong(&net_message, client->frags); MSG_WriteLong(&net_message, (int)(realtime - client->connecttime)); if(sv_status_privacy.integer) MSG_WriteString(&net_message, client->netconnection ? "hidden" : "botclient"); else MSG_WriteString(&net_message, client->netconnection ? client->netconnection->address : "botclient"); StoreBigLong(net_message.data, NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK)); NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress); SZ_Clear(&net_message); } } break; case CCREQ_RULE_INFO: if (developer_extra.integer) Con_DPrintf("Datagram_ParseConnectionless: received CCREQ_RULE_INFO from %s.\n", addressstring2); if(!(islocal || sv_public.integer > -1)) break; if (sv.active) { char *prevCvarName; cvar_t *var; // find the search start location prevCvarName = MSG_ReadString(); var = Cvar_FindVarAfter(prevCvarName, CVAR_NOTIFY); // send the response SZ_Clear(&net_message); // save space for the header, filled in later MSG_WriteLong(&net_message, 0); MSG_WriteByte(&net_message, CCREP_RULE_INFO); if (var) { MSG_WriteString(&net_message, var->name); MSG_WriteString(&net_message, var->string); } StoreBigLong(net_message.data, NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK)); NetConn_Write(mysocket, net_message.data, net_message.cursize, peeraddress); SZ_Clear(&net_message); } break; case CCREQ_RCON: if (developer_extra.integer) Con_DPrintf("Datagram_ParseConnectionless: received CCREQ_RCON from %s.\n", addressstring2); if (sv.active && !rcon_secure.integer) { char password[2048]; char cmd[2048]; char *s; char *endpos; const char *userlevel; strlcpy(password, MSG_ReadString(), sizeof(password)); strlcpy(cmd, MSG_ReadString(), sizeof(cmd)); s = cmd; endpos = cmd + strlen(cmd) + 1; // one behind the NUL, so adding strlen+1 will eventually reach it userlevel = RCon_Authenticate(peeraddress, password, s, endpos, plaintext_matching, NULL, 0); RCon_Execute(mysocket, peeraddress, addressstring2, userlevel, s, endpos, true); return true; } break; default: break; } SZ_Clear(&net_message); // we may not have liked the packet, but it was a valid control // packet, so we're done processing this packet now return true; } if (host_client) { if ((ret = NetConn_ReceivedMessage(host_client->netconnection, data, length, sv.protocol, host_client->spawned ? net_messagetimeout.value : net_connecttimeout.value)) == 2) { SV_VM_Begin(); SV_ReadClientMessage(); SV_VM_End(); return ret; } } return 0; } void NetConn_ServerFrame(void) { int i, length; lhnetaddress_t peeraddress; for (i = 0;i < sv_numsockets;i++) while (sv_sockets[i] && (length = NetConn_Read(sv_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0) NetConn_ServerParsePacket(sv_sockets[i], readbuffer, length, &peeraddress); for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++) { // never timeout loopback connections if (host_client->netconnection && realtime > host_client->netconnection->timeout && LHNETADDRESS_GetAddressType(&host_client->netconnection->peeraddress) != LHNETADDRESSTYPE_LOOP) { Con_Printf("Client \"%s\" connection timed out\n", host_client->name); SV_VM_Begin(); SV_DropClient(false); SV_VM_End(); } } } void NetConn_SleepMicroseconds(int microseconds) { LHNET_SleepUntilPacket_Microseconds(microseconds); } void NetConn_QueryMasters(qboolean querydp, qboolean queryqw) { int i, j; int masternum; lhnetaddress_t masteraddress; lhnetaddress_t broadcastaddress; char request[256]; if (serverlist_cachecount >= SERVERLIST_TOTALSIZE) return; // 26000 is the default quake server port, servers on other ports will not // be found // note this is IPv4-only, I doubt there are IPv6-only LANs out there LHNETADDRESS_FromString(&broadcastaddress, "255.255.255.255", 26000); if (querydp) { for (i = 0;i < cl_numsockets;i++) { if (cl_sockets[i]) { const char *cmdname, *extraoptions; int af = LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])); if(LHNETADDRESS_GetAddressType(&broadcastaddress) == af) { // search LAN for Quake servers SZ_Clear(&net_message); // save space for the header, filled in later MSG_WriteLong(&net_message, 0); MSG_WriteByte(&net_message, CCREQ_SERVER_INFO); MSG_WriteString(&net_message, "QUAKE"); MSG_WriteByte(&net_message, NET_PROTOCOL_VERSION); StoreBigLong(net_message.data, NETFLAG_CTL | (net_message.cursize & NETFLAG_LENGTH_MASK)); NetConn_Write(cl_sockets[i], net_message.data, net_message.cursize, &broadcastaddress); SZ_Clear(&net_message); // search LAN for DarkPlaces servers NetConn_WriteString(cl_sockets[i], "\377\377\377\377getstatus", &broadcastaddress); } // build the getservers message to send to the dpmaster master servers if (LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])) == LHNETADDRESSTYPE_INET6) { cmdname = "getserversExt"; extraoptions = " ipv4 ipv6"; // ask for IPv4 and IPv6 servers } else { cmdname = "getservers"; extraoptions = ""; } dpsnprintf(request, sizeof(request), "\377\377\377\377%s %s %u empty full%s", cmdname, gamename, NET_PROTOCOL_VERSION, extraoptions); // search internet for (masternum = 0;sv_masters[masternum].name;masternum++) { if (sv_masters[masternum].string && sv_masters[masternum].string[0] && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, DPMASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == af) { masterquerycount++; NetConn_WriteString(cl_sockets[i], request, &masteraddress); } } // search favorite servers for(j = 0; j < nFavorites; ++j) { if(LHNETADDRESS_GetAddressType(&favorites[j]) == af) { if(LHNETADDRESS_ToString(&favorites[j], request, sizeof(request), true)) NetConn_ClientParsePacket_ServerList_PrepareQuery( PROTOCOL_DARKPLACES7, request, true ); } } } } } // only query QuakeWorld servers when the user wants to if (queryqw) { for (i = 0;i < cl_numsockets;i++) { if (cl_sockets[i]) { int af = LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])); if(LHNETADDRESS_GetAddressType(&broadcastaddress) == af) { // search LAN for QuakeWorld servers NetConn_WriteString(cl_sockets[i], "\377\377\377\377status\n", &broadcastaddress); // build the getservers message to send to the qwmaster master servers // note this has no -1 prefix, and the trailing nul byte is sent dpsnprintf(request, sizeof(request), "c\n"); } // search internet for (masternum = 0;sv_qwmasters[masternum].name;masternum++) { if (sv_qwmasters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_qwmasters[masternum].string, QWMASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i]))) { if (m_state != m_slist) { char lookupstring[128]; LHNETADDRESS_ToString(&masteraddress, lookupstring, sizeof(lookupstring), true); Con_Printf("Querying master %s (resolved from %s)\n", lookupstring, sv_qwmasters[masternum].string); } masterquerycount++; NetConn_Write(cl_sockets[i], request, (int)strlen(request) + 1, &masteraddress); } } // search favorite servers for(j = 0; j < nFavorites; ++j) { if(LHNETADDRESS_GetAddressType(&favorites[j]) == af) { if(LHNETADDRESS_ToString(&favorites[j], request, sizeof(request), true)) { NetConn_WriteString(cl_sockets[i], "\377\377\377\377status\n", &favorites[j]); NetConn_ClientParsePacket_ServerList_PrepareQuery( PROTOCOL_QUAKEWORLD, request, true ); } } } } } } if (!masterquerycount) { Con_Print("Unable to query master servers, no suitable network sockets active.\n"); M_Update_Return_Reason("No network"); } } void NetConn_Heartbeat(int priority) { lhnetaddress_t masteraddress; int masternum; lhnetsocket_t *mysocket; // if it's a state change (client connected), limit next heartbeat to no // more than 30 sec in the future if (priority == 1 && nextheartbeattime > realtime + 30.0) nextheartbeattime = realtime + 30.0; // limit heartbeatperiod to 30 to 270 second range, // lower limit is to avoid abusing master servers with excess traffic, // upper limit is to avoid timing out on the master server (which uses // 300 sec timeout) if (sv_heartbeatperiod.value < 30) Cvar_SetValueQuick(&sv_heartbeatperiod, 30); if (sv_heartbeatperiod.value > 270) Cvar_SetValueQuick(&sv_heartbeatperiod, 270); // make advertising optional and don't advertise singleplayer games, and // only send a heartbeat as often as the admin wants if (sv.active && sv_public.integer > 0 && svs.maxclients >= 2 && (priority > 1 || realtime > nextheartbeattime)) { nextheartbeattime = realtime + sv_heartbeatperiod.value; for (masternum = 0;sv_masters[masternum].name;masternum++) if (sv_masters[masternum].string && sv_masters[masternum].string[0] && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, DPMASTER_PORT) && (mysocket = NetConn_ChooseServerSocketForAddress(&masteraddress))) NetConn_WriteString(mysocket, "\377\377\377\377heartbeat DarkPlaces\x0A", &masteraddress); } } static void Net_Heartbeat_f(void) { if (sv.active) NetConn_Heartbeat(2); else Con_Print("No server running, can not heartbeat to master server.\n"); } void PrintStats(netconn_t *conn) { if ((cls.state == ca_connected && cls.protocol == PROTOCOL_QUAKEWORLD) || (sv.active && sv.protocol == PROTOCOL_QUAKEWORLD)) Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, !conn->sendMessageLength, conn->outgoing_unreliable_sequence, conn->qw.incoming_sequence); else Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, !conn->sendMessageLength, conn->nq.sendSequence, conn->nq.receiveSequence); } void Net_Stats_f(void) { netconn_t *conn; Con_Printf("unreliable messages sent = %i\n", unreliableMessagesSent); Con_Printf("unreliable messages recv = %i\n", unreliableMessagesReceived); Con_Printf("reliable messages sent = %i\n", reliableMessagesSent); Con_Printf("reliable messages received = %i\n", reliableMessagesReceived); Con_Printf("packetsSent = %i\n", packetsSent); Con_Printf("packetsReSent = %i\n", packetsReSent); Con_Printf("packetsReceived = %i\n", packetsReceived); Con_Printf("receivedDuplicateCount = %i\n", receivedDuplicateCount); Con_Printf("droppedDatagrams = %i\n", droppedDatagrams); Con_Print("connections =\n"); for (conn = netconn_list;conn;conn = conn->next) PrintStats(conn); } void Net_Refresh_f(void) { if (m_state != m_slist) { Con_Print("Sending new requests to master servers\n"); ServerList_QueryList(false, true, false, true); Con_Print("Listening for replies...\n"); } else ServerList_QueryList(false, true, false, false); } void Net_Slist_f(void) { ServerList_ResetMasks(); serverlist_sortbyfield = SLIF_PING; serverlist_sortflags = 0; if (m_state != m_slist) { Con_Print("Sending requests to master servers\n"); ServerList_QueryList(true, true, false, true); Con_Print("Listening for replies...\n"); } else ServerList_QueryList(true, true, false, false); } void Net_SlistQW_f(void) { ServerList_ResetMasks(); serverlist_sortbyfield = SLIF_PING; serverlist_sortflags = 0; if (m_state != m_slist) { Con_Print("Sending requests to master servers\n"); ServerList_QueryList(true, false, true, true); serverlist_consoleoutput = true; Con_Print("Listening for replies...\n"); } else ServerList_QueryList(true, false, true, false); } void NetConn_Init(void) { int i; lhnetaddress_t tempaddress; netconn_mempool = Mem_AllocPool("network connections", 0, NULL); Cmd_AddCommand("net_stats", Net_Stats_f, "print network statistics"); Cmd_AddCommand("net_slist", Net_Slist_f, "query dp master servers and print all server information"); Cmd_AddCommand("net_slistqw", Net_SlistQW_f, "query qw master servers and print all server information"); Cmd_AddCommand("net_refresh", Net_Refresh_f, "query dp master servers and refresh all server information"); Cmd_AddCommand("heartbeat", Net_Heartbeat_f, "send a heartbeat to the master server (updates your server information)"); Cvar_RegisterVariable(&rcon_restricted_password); Cvar_RegisterVariable(&rcon_restricted_commands); Cvar_RegisterVariable(&rcon_secure_maxdiff); Cvar_RegisterVariable(&net_slist_queriespersecond); Cvar_RegisterVariable(&net_slist_queriesperframe); Cvar_RegisterVariable(&net_slist_timeout); Cvar_RegisterVariable(&net_slist_maxtries); Cvar_RegisterVariable(&net_slist_favorites); Cvar_RegisterVariable(&net_slist_pause); Cvar_RegisterVariable(&net_messagetimeout); Cvar_RegisterVariable(&net_connecttimeout); Cvar_RegisterVariable(&net_connectfloodblockingtimeout); Cvar_RegisterVariable(&cl_netlocalping); Cvar_RegisterVariable(&cl_netpacketloss_send); Cvar_RegisterVariable(&cl_netpacketloss_receive); Cvar_RegisterVariable(&hostname); Cvar_RegisterVariable(&developer_networking); Cvar_RegisterVariable(&cl_netport); Cvar_RegisterVariable(&sv_netport); Cvar_RegisterVariable(&net_address); Cvar_RegisterVariable(&net_address_ipv6); Cvar_RegisterVariable(&sv_public); Cvar_RegisterVariable(&sv_public_rejectreason); Cvar_RegisterVariable(&sv_heartbeatperiod); for (i = 0;sv_masters[i].name;i++) Cvar_RegisterVariable(&sv_masters[i]); Cvar_RegisterVariable(&gameversion); Cvar_RegisterVariable(&gameversion_min); Cvar_RegisterVariable(&gameversion_max); // COMMANDLINEOPTION: Server: -ip 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. if ((i = COM_CheckParm("-ip")) && i + 1 < com_argc) { if (LHNETADDRESS_FromString(&tempaddress, com_argv[i + 1], 0) == 1) { Con_Printf("-ip option used, setting net_address to \"%s\"\n", com_argv[i + 1]); Cvar_SetQuick(&net_address, com_argv[i + 1]); } else Con_Printf("-ip option used, but unable to parse the address \"%s\"\n", com_argv[i + 1]); } // COMMANDLINEOPTION: Server: -port 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 if (((i = COM_CheckParm("-port")) || (i = COM_CheckParm("-ipport")) || (i = COM_CheckParm("-udpport"))) && i + 1 < com_argc) { i = atoi(com_argv[i + 1]); if (i >= 0 && i < 65536) { Con_Printf("-port option used, setting port cvar to %i\n", i); Cvar_SetValueQuick(&sv_netport, i); } else Con_Printf("-port option used, but %i is not a valid port number\n", i); } cl_numsockets = 0; sv_numsockets = 0; net_message.data = net_message_buf; net_message.maxsize = sizeof(net_message_buf); net_message.cursize = 0; LHNET_Init(); } void NetConn_Shutdown(void) { NetConn_CloseClientPorts(); NetConn_CloseServerPorts(); LHNET_Shutdown(); }