/* sv_main.c (description) Copyright (C) 1996-1997 Id Software, Inc. 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: Free Software Foundation, Inc. 59 Temple Place - Suite 330 Boston, MA 02111-1307, USA $Id$ */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #ifdef HAVE_STRINGS_H # include #endif #include "bothdefs.h" #include "buildnum.h" #include "cmd.h" #include "commdef.h" #include "crc.h" #include "msg.h" #include "pmove.h" #include "qargs.h" #include "quakefs.h" #include "server.h" #include "sys.h" #include "va.h" #include "ver_check.h" #include "world.h" quakeparms_t host_parms; qboolean host_initialized; // true if into command execution double sv_frametime; double realtime; // without any filtering or bounding int host_hunklevel; netadr_t master_adr[MAX_MASTERS]; // address of group servers client_t *host_client; // current client // DoS protection // FLOOD_PING, FLOOD_LOG, FLOOD_CONNECT, FLOOD_STATUS, FLOOD_RCON, FLOOD_BAN // fixme: these default values need to be tweaked after more testing double netdosexpire[DOSFLOODCMDS] = { 1, 1, 2, 0.9, 1, 5 }; double netdosvalues[DOSFLOODCMDS] = { 12, 1, 3, 1, 1, 1 }; cvar_t *sv_netdosprotect; // tone down DoS from quake servers cvar_t *sv_allow_status; cvar_t *sv_allow_log; cvar_t *sv_allow_ping; cvar_t *fs_globalcfg; cvar_t *sv_mintic; // bound the size of the cvar_t *sv_maxtic; // physics time tic cvar_t *developer; // show extra messages cvar_t *timeout; // seconds without any message cvar_t *zombietime; // seconds to sink messages after // disconnect cvar_t *rcon_password; // password for remote server // commands cvar_t *password; // password for entering the game cvar_t *spectator_password; // password for entering as a // spectator cvar_t *allow_download; cvar_t *allow_download_skins; cvar_t *allow_download_models; cvar_t *allow_download_sounds; cvar_t *allow_download_maps; cvar_t *sv_highchars; cvar_t *sv_phs; cvar_t *pausable; extern cvar_t *sv_timekick; extern cvar_t *sv_timekick_fuzz; extern cvar_t *sv_timekick_interval; cvar_t *sv_minqfversion; // Minimum QF version allowed to // connect cvar_t *sv_maxrate; // Maximum allowable rate (silently // capped) cvar_t *sv_timestamps; cvar_t *sv_timefmt; // // game rules mirrored in svs.info // cvar_t *fraglimit; cvar_t *timelimit; cvar_t *teamplay; cvar_t *samelevel; cvar_t *maxclients; cvar_t *maxspectators; cvar_t *deathmatch; // 0, 1, or 2 cvar_t *spawn; cvar_t *watervis; cvar_t *hostname; QFile *sv_logfile; QFile *sv_fraglogfile; void SV_AcceptClient (netadr_t adr, int userid, char *userinfo); void Master_Shutdown (void); void PR_Init_Cvars (void); //============================================================================ qboolean ServerPaused (void) { return sv.paused; } /* SV_Shutdown Quake calls this before calling Sys_Quit or Sys_Error */ void SV_Shutdown (void) { Master_Shutdown (); if (sv_logfile) { Qclose (sv_logfile); sv_logfile = NULL; } if (sv_fraglogfile) { Qclose (sv_fraglogfile); sv_logfile = NULL; } NET_Shutdown (); } /* SV_Error Sends a datagram to all the clients informing them of the server crash, then exits */ void SV_Error (char *error, ...) { va_list argptr; static char string[1024]; static qboolean inerror = false; if (inerror) Sys_Error ("SV_Error: recursively entered (%s)", string); inerror = true; va_start (argptr, error); vsnprintf (string, sizeof (string), error, argptr); va_end (argptr); Con_Printf ("SV_Error: %s\n", string); SV_FinalMessage (va ("server crashed: %s\n", string)); SV_Shutdown (); Sys_Error ("SV_Error: %s\n", string); } /* SV_FinalMessage Used by SV_Error and SV_Quit_f to send a final message to all connected clients before the server goes down. The messages are sent immediately, not just stuck on the outgoing message list, because the server is going to totally exit after returning from this function. */ void SV_FinalMessage (char *message) { int i; client_t *cl; SZ_Clear (&net_message); MSG_WriteByte (&net_message, svc_print); MSG_WriteByte (&net_message, PRINT_HIGH); MSG_WriteString (&net_message, message); MSG_WriteByte (&net_message, svc_disconnect); for (i = 0, cl = svs.clients; i < MAX_CLIENTS; i++, cl++) if (cl->state >= cs_spawned) Netchan_Transmit (&cl->netchan, net_message.cursize, net_message.data); } /* SV_DropClient Called when the player is totally leaving the server, either willingly or unwillingly. This is NOT called if the entire server is quiting or crashing. */ void SV_DropClient (client_t *drop) { // add the disconnect MSG_WriteByte (&drop->netchan.message, svc_disconnect); if (drop->state == cs_spawned) { if (!drop->spectator) { // call the prog function for removing a client // this will set the body to a dead frame, among other things pr_global_struct->self = EDICT_TO_PROG (drop->edict); PR_ExecuteProgram (pr_global_struct->ClientDisconnect); } else if (SpectatorDisconnect) { // call the prog function for removing a client // this will set the body to a dead frame, among other things pr_global_struct->self = EDICT_TO_PROG (drop->edict); PR_ExecuteProgram (SpectatorDisconnect); } } if (drop->spectator) Con_Printf ("Spectator %s removed\n", drop->name); else Con_Printf ("Client %s removed\n", drop->name); if (drop->download) { Qclose (drop->download); drop->download = NULL; } if (drop->upload) { Qclose (drop->upload); drop->upload = NULL; } *drop->uploadfn = 0; drop->state = cs_zombie; // become free in a few seconds drop->connection_started = realtime; // for zombie timeout drop->old_frags = 0; drop->edict->v.frags = 0; drop->name[0] = 0; memset (drop->userinfo, 0, sizeof (drop->userinfo)); // send notification to all remaining clients SV_FullClientUpdate (drop, &sv.reliable_datagram); } //==================================================================== /* SV_CalcPing */ int SV_CalcPing (client_t *cl) { float ping; int i; int count; register client_frame_t *frame; ping = 0; count = 0; for (frame = cl->frames, i = 0; i < UPDATE_BACKUP; i++, frame++) { if (frame->ping_time > 0) { ping += frame->ping_time; count++; } } if (!count) return 9999; ping /= count; return ping * 1000; } /* SV_FullClientUpdate Writes all update values to a sizebuf */ void SV_FullClientUpdate (client_t *client, sizebuf_t *buf) { int i; char info[MAX_INFO_STRING]; i = client - svs.clients; // Sys_Printf("SV_FullClientUpdate: Updated frags for client %d\n", i); MSG_WriteByte (buf, svc_updatefrags); MSG_WriteByte (buf, i); MSG_WriteShort (buf, client->old_frags); MSG_WriteByte (buf, svc_updateping); MSG_WriteByte (buf, i); MSG_WriteShort (buf, SV_CalcPing (client)); MSG_WriteByte (buf, svc_updatepl); MSG_WriteByte (buf, i); MSG_WriteByte (buf, client->lossage); MSG_WriteByte (buf, svc_updateentertime); MSG_WriteByte (buf, i); MSG_WriteFloat (buf, realtime - client->connection_started); strncpy (info, client->userinfo, sizeof (info)); Info_RemovePrefixedKeys (info, '_'); // server passwords, etc MSG_WriteByte (buf, svc_updateuserinfo); MSG_WriteByte (buf, i); MSG_WriteLong (buf, client->userid); MSG_WriteString (buf, info); } /* SV_FullClientUpdateToClient Writes all update values to a client's reliable stream */ void SV_FullClientUpdateToClient (client_t *client, client_t *cl) { ClientReliableCheckBlock (cl, 24 + strlen (client->userinfo)); if (cl->num_backbuf) { SV_FullClientUpdate (client, &cl->backbuf); ClientReliable_FinishWrite (cl); } else SV_FullClientUpdate (client, &cl->netchan.message); } /* CONNECTIONLESS COMMANDS */ /* CheckForFlood :: EXPERIMENTAL Makes it more difficult to use Quake servers for DoS attacks against other sites. Bad sides: affects gamespy and spytools somewhat... */ int CheckForFlood (flood_enum_t cmdtype) { static qboolean firsttime = true; static flood_t floodstatus[DOSFLOODCMDS][DOSFLOODIP]; int i; double currenttime; double oldestTime; static double lastmessagetime = 0; int oldest; if (!sv_netdosprotect->int_val) return 0; oldestTime = 0x7fffffff; oldest = 0; if (firsttime) { memset (floodstatus, sizeof (flood_t) * DOSFLOODCMDS * DOSFLOODIP, 0); firsttime = false; } currenttime = Sys_DoubleTime (); for (i = 0; i < DOSFLOODIP; i++) { if (NET_CompareBaseAdr (net_from, floodstatus[cmdtype][i].adr)) break; if (floodstatus[cmdtype][i].issued < oldestTime) { oldestTime = floodstatus[cmdtype][i].issued; oldest = i; } } if (i < DOSFLOODIP && floodstatus[cmdtype][i].issued) { if ((floodstatus[cmdtype][i].issued + netdosexpire[cmdtype]) > currenttime) { floodstatus[cmdtype][i].floodcount += 1; if (floodstatus[cmdtype][i].floodcount > netdosvalues[cmdtype]) { if ((lastmessagetime + 5) < currenttime) Con_Printf ("Blocking type %d flood from (or to) %s\n", cmdtype, NET_AdrToString (net_from)); floodstatus[cmdtype][i].floodcount = 0; floodstatus[cmdtype][i].issued = currenttime; floodstatus[cmdtype][i].cmdcount += 1; lastmessagetime = currenttime; return 1; } } else { floodstatus[cmdtype][i].floodcount = 0; } } if (i == DOSFLOODIP) { i = oldest; floodstatus[cmdtype][i].adr = net_from; floodstatus[cmdtype][i].firstseen = currenttime; floodstatus[cmdtype][i].cmdcount = 0; floodstatus[cmdtype][i].floodcount = 0; } floodstatus[cmdtype][i].issued = currenttime; floodstatus[cmdtype][i].cmdcount += 1; return 0; } /* SVC_Status Responds with all the info that qplug or qspy can see This message can be up to around 5k with worst case string lengths. */ void SVC_Status (void) { int i; client_t *cl; int ping; int top, bottom; if (!sv_allow_status->int_val) return; if (CheckForFlood (FLOOD_STATUS)) return; Cmd_TokenizeString ("status"); SV_BeginRedirect (RD_PACKET); Con_Printf ("%s\n", svs.info); for (i = 0; i < MAX_CLIENTS; i++) { cl = &svs.clients[i]; if ((cl->state == cs_connected || cl->state == cs_spawned) && !cl->spectator) { top = atoi (Info_ValueForKey (cl->userinfo, "topcolor")); bottom = atoi (Info_ValueForKey (cl->userinfo, "bottomcolor")); top = (top < 0) ? 0 : ((top > 13) ? 13 : top); bottom = (bottom < 0) ? 0 : ((bottom > 13) ? 13 : bottom); ping = SV_CalcPing (cl); Con_Printf ("%i %i %i %i \"%s\" \"%s\" %i %i\n", cl->userid, cl->old_frags, (int) (realtime - cl->connection_started) / 60, ping, cl->name, Info_ValueForKey (cl->userinfo, "skin"), top, bottom); } } SV_EndRedirect (); } /* SV_CheckLog */ #define LOG_HIGHWATER 4096 #define LOG_FLUSH 10*60 void SV_CheckLog (void) { sizebuf_t *sz; sz = &svs.log[svs.logsequence & 1]; // bump sequence if allmost full, or ten minutes have passed and // there is something still sitting there if (sz->cursize > LOG_HIGHWATER || (realtime - svs.logtime > LOG_FLUSH && sz->cursize)) { // swap buffers and bump sequence svs.logtime = realtime; svs.logsequence++; sz = &svs.log[svs.logsequence & 1]; sz->cursize = 0; Con_Printf ("beginning fraglog sequence %i\n", svs.logsequence); } } /* SVC_Log Responds with all the logged frags for ranking programs. If a sequence number is passed as a parameter and it is the same as the current sequence, an A2A_NACK will be returned instead of the data. */ void SVC_Log (void) { int seq; char data[MAX_DATAGRAM + 64]; if (!sv_allow_log->int_val) return; if (CheckForFlood (FLOOD_LOG)) return; if (Cmd_Argc () == 2) seq = atoi (Cmd_Argv (1)); else seq = -1; if (seq == svs.logsequence - 1 || !sv_fraglogfile) { // they allready // have this // data, or we // aren't logging // frags data[0] = A2A_NACK; NET_SendPacket (1, data, net_from); return; } Con_DPrintf ("sending log %i to %s\n", svs.logsequence - 1, NET_AdrToString (net_from)); // snprintf (data, sizeof (data), "stdlog %i\n", svs.logsequence-1); // strncat (data, (char *)svs.log_buf[((svs.logsequence-1)&1)], // sizeof(data) - strlen (data)); snprintf (data, sizeof (data), "stdlog %i\n%s", svs.logsequence - 1, (char *) svs.log_buf[((svs.logsequence - 1) & 1)]); NET_SendPacket (strlen (data) + 1, data, net_from); } /* SVC_Ping Just responds with an acknowledgement */ void SVC_Ping (void) { char data; if (!sv_allow_ping->int_val) return; if (CheckForFlood (FLOOD_PING)) return; data = A2A_ACK; NET_SendPacket (1, &data, net_from); } /* SVC_GetChallenge Returns a challenge number that can be used in a subsequent client_connect command. We do this to prevent denial of service attacks that flood the server with invalid connection IPs. With a challenge, they must give a valid IP address. */ void SVC_GetChallenge (void) { int i; int oldest; int oldestTime; oldest = 0; oldestTime = 0x7fffffff; // see if we already have a challenge for this ip for (i = 0; i < MAX_CHALLENGES; i++) { if (NET_CompareBaseAdr (net_from, svs.challenges[i].adr)) break; if (svs.challenges[i].time < oldestTime) { oldestTime = svs.challenges[i].time; oldest = i; } } if (i == MAX_CHALLENGES) { // overwrite the oldest svs.challenges[oldest].challenge = (rand () << 16) ^ rand (); svs.challenges[oldest].adr = net_from; svs.challenges[oldest].time = realtime; i = oldest; } // send it back Netchan_OutOfBandPrint (net_from, "%c%i QF", S2C_CHALLENGE, svs.challenges[i].challenge); } /* SVC_DirectConnect A connection request that did not come from the master */ void SVC_DirectConnect (void) { char userinfo[1024]; static int userid; netadr_t adr; int i; client_t *cl, *newcl; client_t temp; edict_t *ent; int edictnum; char *s; int clients, spectators; qboolean spectator; int qport; int version; int challenge; if (CheckForFlood (FLOOD_CONNECT)) return; version = atoi (Cmd_Argv (1)); if (version != PROTOCOL_VERSION) { Netchan_OutOfBandPrint (net_from, "%c\nServer is version %s.\n", A2C_PRINT, QW_VERSION); Con_Printf ("* rejected connect from version %i\n", version); return; } qport = atoi (Cmd_Argv (2)); challenge = atoi (Cmd_Argv (3)); // note an extra byte is needed to replace spectator key strncpy (userinfo, Cmd_Argv (4), sizeof (userinfo) - 2); userinfo[sizeof (userinfo) - 2] = 0; // see if the challenge is valid for (i = 0; i < MAX_CHALLENGES; i++) { if (NET_CompareBaseAdr (net_from, svs.challenges[i].adr)) { if (challenge == svs.challenges[i].challenge) break; // good Netchan_OutOfBandPrint (net_from, "%c\nBad challenge.\n", A2C_PRINT); return; } } if (i == MAX_CHALLENGES) { Netchan_OutOfBandPrint (net_from, "%c\nNo challenge for address.\n", A2C_PRINT); return; } s = Info_ValueForKey (userinfo, "*qf_version"); if ((!s[0]) || sv_minqfversion->value) { // kick old clients? if (ver_compare (s, sv_minqfversion->string) < 0) { Con_Printf ("%s: Version %s is less than minimum version %s.\n", NET_AdrToString (net_from), s, sv_minqfversion->string); Netchan_OutOfBandPrint (net_from, "%c\nserver requires QuakeForge v%s or greater. Get it from http://www.quakeforge.net/\n", A2C_PRINT, sv_minqfversion->string); return; } } // check for password or spectator_password s = Info_ValueForKey (userinfo, "spectator"); if (s[0] && strcmp (s, "0")) { if (spectator_password->string[0] && stricmp (spectator_password->string, "none") && strcmp (spectator_password->string, s)) { // failed Con_Printf ("%s:spectator password failed\n", NET_AdrToString (net_from)); Netchan_OutOfBandPrint (net_from, "%c\nrequires a spectator password\n\n", A2C_PRINT); return; } Info_RemoveKey (userinfo, "spectator"); // remove passwd Info_SetValueForStarKey (userinfo, "*spectator", "1", MAX_INFO_STRING); spectator = true; } else { s = Info_ValueForKey (userinfo, "password"); if (password->string[0] && stricmp (password->string, "none") && strcmp (password->string, s)) { Con_Printf ("%s:password failed\n", NET_AdrToString (net_from)); Netchan_OutOfBandPrint (net_from, "%c\nserver requires a password\n\n", A2C_PRINT); return; } spectator = false; Info_RemoveKey (userinfo, "password"); // remove passwd } adr = net_from; userid++; // so every client gets a unique id newcl = &temp; memset (newcl, 0, sizeof (client_t)); newcl->userid = userid; // works properly if (!sv_highchars->int_val) { byte *p, *q; for (p = (byte *) newcl->userinfo, q = (byte *) userinfo; *q && p < (byte *) newcl->userinfo + sizeof (newcl->userinfo) - 1; q++) if (*q > 31 && *q <= 127) *p++ = *q; } else strncpy (newcl->userinfo, userinfo, sizeof (newcl->userinfo) - 1); // if there is allready a slot for this ip, drop it for (i = 0, cl = svs.clients; i < MAX_CLIENTS; i++, cl++) { if (cl->state == cs_free) continue; if (NET_CompareBaseAdr (adr, cl->netchan.remote_address) && (cl->netchan.qport == qport || adr.port == cl->netchan.remote_address.port)) { if (cl->state == cs_connected) { Con_Printf ("%s:dup connect\n", NET_AdrToString (adr)); userid--; return; } Con_Printf ("%s:reconnect\n", NET_AdrToString (adr)); SV_DropClient (cl); break; } } // count up the clients and spectators clients = 0; spectators = 0; for (i = 0, cl = svs.clients; i < MAX_CLIENTS; i++, cl++) { if (cl->state == cs_free) continue; if (cl->spectator) spectators++; else clients++; } // if at server limits, refuse connection if (maxclients->int_val > MAX_CLIENTS) Cvar_SetValue (maxclients, MAX_CLIENTS); if (maxspectators->int_val > MAX_CLIENTS) Cvar_SetValue (maxspectators, MAX_CLIENTS); if (maxspectators->int_val + maxclients->int_val > MAX_CLIENTS) Cvar_SetValue (maxspectators, MAX_CLIENTS - maxclients->int_val); if ((spectator && spectators >= maxspectators->int_val) || (!spectator && clients >= maxclients->int_val)) { Con_Printf ("%s:full connect\n", NET_AdrToString (adr)); Netchan_OutOfBandPrint (adr, "%c\nserver is full\n\n", A2C_PRINT); return; } // find a client slot newcl = NULL; for (i = 0, cl = svs.clients; i < MAX_CLIENTS; i++, cl++) { if (cl->state == cs_free) { newcl = cl; break; } } if (!newcl) { Con_Printf ("WARNING: miscounted available clients\n"); return; } // build a new connection // accept the new client // this is the only place a client_t is ever initialized *newcl = temp; Netchan_OutOfBandPrint (adr, "%c", S2C_CONNECTION); edictnum = (newcl - svs.clients) + 1; Netchan_Setup (&newcl->netchan, adr, qport); newcl->state = cs_connected; newcl->datagram.allowoverflow = true; newcl->datagram.data = newcl->datagram_buf; newcl->datagram.maxsize = sizeof (newcl->datagram_buf); // spectator mode can ONLY be set at join time newcl->spectator = spectator; ent = EDICT_NUM (edictnum); newcl->edict = ent; // parse some info from the info strings SV_ExtractFromUserinfo (newcl); // JACK: Init the floodprot stuff. for (i = 0; i < 10; i++) newcl->whensaid[i] = 0.0; newcl->whensaidhead = 0; newcl->lockedtill = 0; // call the progs to get default spawn parms for the new client PR_ExecuteProgram (pr_global_struct->SetNewParms); for (i = 0; i < NUM_SPAWN_PARMS; i++) newcl->spawn_parms[i] = (&pr_global_struct->parm1)[i]; if (newcl->spectator) Con_Printf ("Spectator %s connected\n", newcl->name); else Con_DPrintf ("Client %s connected\n", newcl->name); newcl->sendinfo = true; // QuakeForge stuff. newcl->msecs = 0; newcl->msec_cheating = 0; newcl->last_check = -1; } int Rcon_Validate (void) { if (!strlen (rcon_password->string)) return 0; if (strcmp (Cmd_Argv (1), rcon_password->string)) return 0; return 1; } /* SVC_RemoteCommand A client issued an rcon command. Shift down the remaining args Redirect all printfs */ void SVC_RemoteCommand (void) { int i; int len = 0; char remaining[1024]; if (CheckForFlood (FLOOD_RCON)) return; if (!Rcon_Validate ()) { Con_Printf ("Bad rcon from %s:\n%s\n", NET_AdrToString (net_from), net_message.data + 4); SV_BeginRedirect (RD_PACKET); Con_Printf ("Bad rcon_password.\n"); } else { remaining[0] = 0; for (i = 2; i < Cmd_Argc (); i++) { strncat (remaining, Cmd_Argv (i), sizeof (remaining) - len - 1); strncat (remaining, " ", sizeof (remaining) - len - 2); len += strlen (Cmd_Argv (i)) + 1; // +1 for " " } Con_Printf ("Rcon from %s:\nrcon (hidden) %s\n", NET_AdrToString (net_from), remaining); SV_BeginRedirect (RD_PACKET); Cmd_ExecuteString (remaining); } SV_EndRedirect (); } /* SV_ConnectionlessPacket A connectionless packet has four leading 0xff characters to distinguish it from a game channel. Clients that are in the game can still send connectionless packets. */ void SV_ConnectionlessPacket (void) { char *s; char *c; MSG_BeginReading (); MSG_ReadLong (); // skip the -1 marker s = MSG_ReadStringLine (); Cmd_TokenizeString (s); c = Cmd_Argv (0); if (!strcmp (c, "ping") || (c[0] == A2A_PING && (c[1] == 0 || c[1] == '\n'))) { SVC_Ping (); return; } if (c[0] == A2A_ACK && (c[1] == 0 || c[1] == '\n')) { Con_Printf ("A2A_ACK from %s\n", NET_AdrToString (net_from)); return; } else if (!strcmp (c, "status")) { SVC_Status (); return; } else if (!strcmp (c, "log")) { SVC_Log (); return; } else if (!strcmp (c, "connect")) { SVC_DirectConnect (); return; } else if (!strcmp (c, "getchallenge")) { SVC_GetChallenge (); return; } else if (!strcmp (c, "rcon")) SVC_RemoteCommand (); else Con_Printf ("bad connectionless packet from %s:\n%s\n", NET_AdrToString (net_from), s); } /* PACKET FILTERING You can add or remove addresses from the filter list with: addip removeip The ip address is specified in dot format, and any unspecified digits will match any value, so you can specify an entire class C network with "addip 192.246.40". Removeip will only remove an address specified exactly the same way. You cannot addip a subnet, then removeip a single host. listip Prints the current list of filters. writeip Dumps "addip " commands to listip.cfg so it can be execed at a later date. The filter lists are not saved and restored by default, because I beleive it would cause too much confusion. filterban <0 or 1> If 1 (the default), then ip addresses matching the current list will be prohibited from entering the game. This is the default setting. If 0, then only addresses matching the list will be allowed. This lets you easily set up a private game, or a game that only allows players from your local network. */ typedef struct { unsigned int mask; unsigned int compare; } ipfilter_t; #define MAX_IPFILTERS 1024 ipfilter_t ipfilters[MAX_IPFILTERS]; int numipfilters; cvar_t *filterban; /* StringToFilter */ qboolean StringToFilter (char *s, ipfilter_t * f) { char num[128]; int i, j; byte b[4]; byte m[4]; for (i = 0; i < 4; i++) { b[i] = 0; m[i] = 0; } for (i = 0; i < 4; i++) { if (*s < '0' || *s > '9') { Con_Printf ("Bad filter address: %s\n", s); return false; } j = 0; while (*s >= '0' && *s <= '9') { num[j++] = *s++; } num[j] = 0; b[i] = atoi (num); if (b[i] != 0) m[i] = 255; if (!*s) break; s++; } f->mask = *(unsigned int *) m; f->compare = *(unsigned int *) b; return true; } /* SV_AddIP_f */ void SV_AddIP_f (void) { int i; for (i = 0; i < numipfilters; i++) if (ipfilters[i].compare == 0xffffffff) break; // free spot if (i == numipfilters) { if (numipfilters == MAX_IPFILTERS) { Con_Printf ("IP filter list is full\n"); return; } numipfilters++; } if (!StringToFilter (Cmd_Argv (1), &ipfilters[i])) ipfilters[i].compare = 0xffffffff; } /* SV_RemoveIP_f */ void SV_RemoveIP_f (void) { ipfilter_t f; int i, j; if (!StringToFilter (Cmd_Argv (1), &f)) return; for (i = 0; i < numipfilters; i++) if (ipfilters[i].mask == f.mask && ipfilters[i].compare == f.compare) { for (j = i + 1; j < numipfilters; j++) ipfilters[j - 1] = ipfilters[j]; numipfilters--; Con_Printf ("Removed.\n"); return; } Con_Printf ("Didn't find %s.\n", Cmd_Argv (1)); } /* SV_ListIP_f */ void SV_ListIP_f (void) { int i; byte b[4]; Con_Printf ("Filter list:\n"); for (i = 0; i < numipfilters; i++) { *(unsigned int *) b = ipfilters[i].compare; Con_Printf ("%3i.%3i.%3i.%3i\n", b[0], b[1], b[2], b[3]); } } /* SV_WriteIP_f */ void SV_WriteIP_f (void) { QFile *f; char name[MAX_OSPATH]; byte b[4]; int i; snprintf (name, sizeof (name), "%s/listip.cfg", com_gamedir); Con_Printf ("Writing %s.\n", name); f = Qopen (name, "wb"); if (!f) { Con_Printf ("Couldn't open %s\n", name); return; } for (i = 0; i < numipfilters; i++) { *(unsigned int *) b = ipfilters[i].compare; Qprintf (f, "addip %i.%i.%i.%i\n", b[0], b[1], b[2], b[3]); } Qclose (f); } /* netDoSexpire_f */ void SV_netDoSexpire_f (void) { int arg1; int i; if (Cmd_Argc () == 1) { Con_Printf ("Current DoS prot. expire settings: "); for (i = 0; i < DOSFLOODCMDS; i++) Con_Printf ("%f ", netdosexpire[i]); Con_Printf ("\n"); if (!sv_netdosprotect->int_val) Con_Printf ("(disabled)\n"); return; } if (Cmd_Argc () != DOSFLOODCMDS + 1) { Con_Printf ("Usage: netdosexpire \n"); return; } for (i = 0; i < DOSFLOODCMDS; i++) { arg1 = atoi (Cmd_Argv (i + 1)); if (arg1 > 0) netdosexpire[i] = arg1; } return; } /* DoSvalues_f */ void SV_netDoSvalues_f (void) { int arg1; int i; if (Cmd_Argc () == 1) { Con_Printf ("Current DoS prot. value settings: "); for (i = 0; i < DOSFLOODCMDS; i++) Con_Printf ("%f ", netdosvalues[i]); Con_Printf ("\n"); if (!sv_netdosprotect->int_val) Con_Printf ("(disabled)\n"); return; } if (Cmd_Argc () != DOSFLOODCMDS + 1) { Con_Printf ("Usage: netdosvalues \n"); return; } for (i = 0; i < DOSFLOODCMDS; i++) { arg1 = atoi (Cmd_Argv (i + 1)); if (arg1 > 0) netdosvalues[i] = arg1; } return; } /* SV_SendBan */ void SV_SendBan (void) { char data[128]; if (CheckForFlood (FLOOD_BAN)) return; data[0] = data[1] = data[2] = data[3] = 0xff; data[4] = A2C_PRINT; data[5] = 0; strncat (data, "\nbanned.\n", sizeof (data) - strlen (data)); NET_SendPacket (strlen (data), data, net_from); } /* SV_FilterPacket */ qboolean SV_FilterPacket (void) { int i; unsigned int in; in = *(unsigned int *) net_from.ip; for (i = 0; i < numipfilters; i++) if ((in & ipfilters[i].mask) == ipfilters[i].compare) return filterban->int_val; return !filterban->int_val; // FIXME eh? } //============================================================================ /* SV_ReadPackets */ void SV_ReadPackets (void) { int i; client_t *cl; qboolean good; int qport; good = false; while (NET_GetPacket ()) { if (SV_FilterPacket ()) { SV_SendBan (); // tell them we aren't listening... continue; } // check for connectionless packet (0xffffffff) first if (*(int *) net_message.data == -1) { SV_ConnectionlessPacket (); continue; } if (net_message.cursize < 11) { Con_Printf ("%s: Runt packet\n", NET_AdrToString (net_from)); continue; } // read the qport out of the message so we can fix up // stupid address translating routers MSG_BeginReading (); MSG_ReadLong (); // sequence number MSG_ReadLong (); // sequence number qport = MSG_ReadShort () & 0xffff; // check for packets from connected clients for (i = 0, cl = svs.clients; i < MAX_CLIENTS; i++, cl++) { if (cl->state == cs_free) continue; if (!NET_CompareBaseAdr (net_from, cl->netchan.remote_address)) continue; if (cl->netchan.qport != qport) continue; if (cl->netchan.remote_address.port != net_from.port) { Con_DPrintf ("SV_ReadPackets: fixing up a translated port\n"); cl->netchan.remote_address.port = net_from.port; } if (Netchan_Process (&cl->netchan)) { // this is a valid, // sequenced packet, so // process it svs.stats.packets++; good = true; cl->send_message = true; // reply at end of frame if (cl->state != cs_zombie) SV_ExecuteClientMessage (cl); } break; } if (i != MAX_CLIENTS) continue; // packet is not from a known client // Con_Printf ("%s:sequenced packet without connection\n" // ,NET_AdrToString(net_from)); } } /* SV_CheckTimeouts If a packet has not been received from a client in timeout.value seconds, drop the conneciton. When a client is normally dropped, the client_t goes into a zombie state for a few seconds to make sure any final reliable message gets resent if necessary */ void SV_CheckTimeouts (void) { int i; client_t *cl; float droptime; int nclients; droptime = realtime - timeout->value; nclients = 0; for (i = 0, cl = svs.clients; i < MAX_CLIENTS; i++, cl++) { if (cl->state == cs_connected || cl->state == cs_spawned) { if (!cl->spectator) nclients++; if (cl->netchan.last_received < droptime) { SV_BroadcastPrintf (PRINT_HIGH, "%s timed out\n", cl->name); SV_DropClient (cl); cl->state = cs_free; // don't bother with zombie state } } if (cl->state == cs_zombie && realtime - cl->connection_started > zombietime->value) { cl->state = cs_free; // can now be reused } } if (sv.paused && !nclients) { // nobody left, unpause the server SV_TogglePause ("Pause released since no players are left.\n"); } } /* SV_GetConsoleCommands Add them exactly as if they had been typed at the console */ void SV_GetConsoleCommands (void) { char *cmd; while (1) { cmd = Sys_ConsoleInput (); if (!cmd) break; Cbuf_AddText (cmd); } } /* SV_CheckVars */ void SV_CheckVars (void) { static char *pw, *spw; int v; if (password->string == pw && spectator_password->string == spw) return; pw = password->string; spw = spectator_password->string; v = 0; if (pw && pw[0] && strcmp (pw, "none")) v |= 1; if (spw && spw[0] && strcmp (spw, "none")) v |= 2; Con_Printf ("Updated needpass.\n"); if (!v) Info_SetValueForKey (svs.info, "needpass", "", MAX_SERVERINFO_STRING); else Info_SetValueForKey (svs.info, "needpass", va ("%i", v), MAX_SERVERINFO_STRING); } /* SV_Frame */ void SV_Frame (float time) { static double start, end; start = Sys_DoubleTime (); svs.stats.idle += start - end; // keep the random time dependent rand (); // decide the simulation time if (!sv.paused) { realtime += time; sv.time += time; } // check timeouts SV_CheckTimeouts (); // toggle the log buffer if full SV_CheckLog (); // move autonomous things around if enough time has passed if (!sv.paused) SV_Physics (); // get packets SV_ReadPackets (); // check for commands typed to the host SV_GetConsoleCommands (); // process console commands Cbuf_Execute (); SV_CheckVars (); // send messages back to the clients that had packets read this frame SV_SendClientMessages (); // send a heartbeat to the master if needed Master_Heartbeat (); // collect timing statistics end = Sys_DoubleTime (); svs.stats.active += end - start; if (++svs.stats.count == STATFRAMES) { svs.stats.latched_active = svs.stats.active; svs.stats.latched_idle = svs.stats.idle; svs.stats.latched_packets = svs.stats.packets; svs.stats.active = 0; svs.stats.idle = 0; svs.stats.packets = 0; svs.stats.count = 0; } } /* SV_InitLocal */ void SV_InitLocal (void) { int i; extern cvar_t *sv_maxvelocity; extern cvar_t *sv_gravity; extern cvar_t *sv_aim; extern cvar_t *sv_stopspeed; extern cvar_t *sv_spectatormaxspeed; extern cvar_t *sv_accelerate; extern cvar_t *sv_airaccelerate; extern cvar_t *sv_wateraccelerate; extern cvar_t *sv_friction; extern cvar_t *sv_waterfriction; SV_UserInit (); rcon_password = Cvar_Get ("rcon_password", "", CVAR_NONE, "None"); password = Cvar_Get ("password", "", CVAR_NONE, "None"); spectator_password = Cvar_Get ("spectator_password", "", CVAR_NONE, "None"); sv_mintic = Cvar_Get ("sv_mintic", "0.03", CVAR_NONE, "None"); sv_maxtic = Cvar_Get ("sv_maxtic", "0.1", CVAR_NONE, "None"); fraglimit = Cvar_Get ("fraglimit", "0", CVAR_SERVERINFO, "None"); timelimit = Cvar_Get ("timelimit", "0", CVAR_SERVERINFO, "None"); teamplay = Cvar_Get ("teamplay", "0", CVAR_SERVERINFO, "None"); samelevel = Cvar_Get ("samelevel", "0", CVAR_SERVERINFO, "None"); maxclients = Cvar_Get ("maxclients", "8", CVAR_SERVERINFO, "None"); maxspectators = Cvar_Get ("maxspectators", "8", CVAR_SERVERINFO, "None"); hostname = Cvar_Get ("hostname", "unnamed", CVAR_SERVERINFO, "None"); deathmatch = Cvar_Get ("deathmatch", "1", CVAR_SERVERINFO, "None"); spawn = Cvar_Get ("spawn", "0", CVAR_SERVERINFO, "None"); watervis = Cvar_Get ("watervis", "0", CVAR_SERVERINFO, "None"); developer = Cvar_Get ("developer", "0", CVAR_NONE, "None"); timeout = Cvar_Get ("timeout", "65", CVAR_NONE, "None"); zombietime = Cvar_Get ("zombietime", "2", CVAR_NONE, "None"); sv_maxvelocity = Cvar_Get ("sv_maxvelocity", "2000", CVAR_NONE, "None"); sv_gravity = Cvar_Get ("sv_gravity", "800", CVAR_NONE, "None"); sv_stopspeed = Cvar_Get ("sv_stopspeed", "100", CVAR_NONE, "None"); sv_maxspeed = Cvar_Get ("sv_maxspeed", "320", CVAR_NONE, "None"); sv_spectatormaxspeed = Cvar_Get ("sv_spectatormaxspeed", "500", CVAR_NONE, "None"); sv_accelerate = Cvar_Get ("sv_accelerate", "10", CVAR_NONE, "None"); sv_airaccelerate = Cvar_Get ("sv_airaccelerate", "0.7", CVAR_NONE, "None"); sv_wateraccelerate = Cvar_Get ("sv_wateraccelerate", "10", CVAR_NONE, "None"); sv_friction = Cvar_Get ("sv_friction", "4", CVAR_NONE, "None"); sv_waterfriction = Cvar_Get ("sv_waterfriction", "4", CVAR_NONE, "None"); sv_aim = Cvar_Get ("sv_aim", "2", CVAR_NONE, "None"); sv_timekick = Cvar_Get ("sv_timekick", "3", CVAR_SERVERINFO, "Time cheat protection"); sv_timekick_fuzz = Cvar_Get ("sv_timekick_fuzz", "15", CVAR_NONE, "Time cheat \"fuzz factor\""); sv_timekick_interval = Cvar_Get ("sv_timekick_interval", "30", CVAR_NONE, "Time cheat check interval"); sv_minqfversion = Cvar_Get ("sv_minqfversion", "0", CVAR_SERVERINFO, "Minimum QF version on client"); sv_maxrate = Cvar_Get ("sv_maxrate", "0", CVAR_SERVERINFO, "Maximum allowable rate"); sv_allow_log = Cvar_Get ("sv_allow_log", "1", CVAR_NONE, "Allow remote logging"); sv_allow_status = Cvar_Get ("sv_allow_status", "1", CVAR_NONE, "Allow remote status queries (gamespy etc)"); sv_allow_ping = Cvar_Get ("sv_allow_pings", "1", CVAR_NONE, "Allow remote pings (gamespy etc)"); sv_netdosprotect = Cvar_Get ("sv_netdosprotect", "0", CVAR_NONE, "DoS flood attack protection"); sv_timestamps = Cvar_Get ("sv_timestamps", "0", CVAR_NONE, "Time/date stamps in log entries"); sv_timefmt = Cvar_Get ("sv_timefmt", "[%b %e %X] ", CVAR_NONE, "Time/date format to use"); filterban = Cvar_Get ("filterban", "1", CVAR_NONE, "None"); allow_download = Cvar_Get ("allow_download", "1", CVAR_NONE, "None"); allow_download_skins = Cvar_Get ("allow_download_skins", "1", CVAR_NONE, "None"); allow_download_models = Cvar_Get ("allow_download_models", "1", CVAR_NONE, "None"); allow_download_sounds = Cvar_Get ("allow_download_sounds", "1", CVAR_NONE, "None"); allow_download_maps = Cvar_Get ("allow_download_maps", "1", CVAR_NONE, "None"); sv_highchars = Cvar_Get ("sv_highchars", "1", CVAR_NONE, "None"); sv_phs = Cvar_Get ("sv_phs", "1", CVAR_NONE, "None"); pausable = Cvar_Get ("pausable", "1", CVAR_NONE, "None"); // DoS protection Cmd_AddCommand ("netdosexpire", SV_netDoSexpire_f); Cmd_AddCommand ("netdosvalues", SV_netDoSvalues_f); Cmd_AddCommand ("addip", SV_AddIP_f); Cmd_AddCommand ("removeip", SV_RemoveIP_f); Cmd_AddCommand ("listip", SV_ListIP_f); Cmd_AddCommand ("writeip", SV_WriteIP_f); for (i = 0; i < MAX_MODELS; i++) snprintf (localmodels[i], sizeof (localmodels[i]), "*%i", i); Info_SetValueForStarKey (svs.info, "*version", QW_VERSION, MAX_SERVERINFO_STRING); // Brand server as QF, with appropriate QSG standards version --KB Info_SetValueForStarKey (svs.info, "*qf_version", VERSION, MAX_SERVERINFO_STRING); Info_SetValueForStarKey (svs.info, "*qsg_version", QSG_VERSION, MAX_SERVERINFO_STRING); // init fraglog stuff svs.logsequence = 1; svs.logtime = realtime; svs.log[0].data = svs.log_buf[0]; svs.log[0].maxsize = sizeof (svs.log_buf[0]); svs.log[0].cursize = 0; svs.log[0].allowoverflow = true; svs.log[1].data = svs.log_buf[1]; svs.log[1].maxsize = sizeof (svs.log_buf[1]); svs.log[1].cursize = 0; svs.log[1].allowoverflow = true; } //============================================================================ /* Master_Heartbeat Send a message to the master every few minutes to let it know we are alive, and log information */ #define HEARTBEAT_SECONDS 300 void Master_Heartbeat (void) { char string[2048]; int active; int i; if (realtime - svs.last_heartbeat < HEARTBEAT_SECONDS) return; // not time to send yet svs.last_heartbeat = realtime; // // count active users // active = 0; for (i = 0; i < MAX_CLIENTS; i++) if (svs.clients[i].state == cs_connected || svs.clients[i].state == cs_spawned) active++; svs.heartbeat_sequence++; snprintf (string, sizeof (string), "%c\n%i\n%i\n", S2M_HEARTBEAT, svs.heartbeat_sequence, active); // send to group master for (i = 0; i < MAX_MASTERS; i++) if (master_adr[i].port) { Con_Printf ("Sending heartbeat to %s\n", NET_AdrToString (master_adr[i])); NET_SendPacket (strlen (string), string, master_adr[i]); } } /* Master_Shutdown Informs all masters that this server is going down */ void Master_Shutdown (void) { char string[2048]; int i; snprintf (string, sizeof (string), "%c\n", S2M_SHUTDOWN); // send to group master for (i = 0; i < MAX_MASTERS; i++) if (master_adr[i].port) { Con_Printf ("Sending heartbeat to %s\n", NET_AdrToString (master_adr[i])); NET_SendPacket (strlen (string), string, master_adr[i]); } } /* SV_ExtractFromUserinfo Pull specific info from a newly changed userinfo string into a more C freindly form. */ void SV_ExtractFromUserinfo (client_t *cl) { char *val, *p, *q; int i; client_t *client; int dupc = 1; char newname[80]; // name for C code val = Info_ValueForKey (cl->userinfo, "name"); // trim user name strncpy (newname, val, sizeof (newname) - 1); newname[sizeof (newname) - 1] = 0; for (p = newname; (*p == ' ' || *p == '\r' || *p == '\n') && *p; p++); if (p != newname && !*p) { // white space only strcpy (newname, "unnamed"); p = newname; } if (p != newname && *p) { for (q = newname; *p; *q++ = *p++); *q = 0; } for (p = newname + strlen (newname) - 1; p != newname && (*p == ' ' || *p == '\r' || *p == '\n'); p--); p[1] = 0; if (strcmp (val, newname)) { Info_SetValueForKey (cl->userinfo, "name", newname, MAX_INFO_STRING); val = Info_ValueForKey (cl->userinfo, "name"); } if (!val[0] || !stricmp (val, "console")) { Info_SetValueForKey (cl->userinfo, "name", "unnamed", MAX_INFO_STRING); val = Info_ValueForKey (cl->userinfo, "name"); } // check to see if another user by the same name exists while (1) { for (i = 0, client = svs.clients; i < MAX_CLIENTS; i++, client++) { if (client->state != cs_spawned || client == cl) continue; if (!stricmp (client->name, val)) break; } if (i != MAX_CLIENTS) { // dup name if (strlen (val) > sizeof (cl->name) - 1) val[sizeof (cl->name) - 4] = 0; p = val; if (val[0] == '(') { if (val[2] == ')') p = val + 3; else if (val[3] == ')') p = val + 4; } snprintf (newname, sizeof (newname), "(%d)%-.40s", dupc++, p); Info_SetValueForKey (cl->userinfo, "name", newname, MAX_INFO_STRING); val = Info_ValueForKey (cl->userinfo, "name"); } else break; } if (strncmp (val, cl->name, strlen (cl->name))) { if (!sv.paused) { if (!cl->lastnametime || realtime - cl->lastnametime > 5) { cl->lastnamecount = 0; cl->lastnametime = realtime; } else if (cl->lastnamecount++ > 4) { SV_BroadcastPrintf (PRINT_HIGH, "%s was kicked for name spam\n", cl->name); SV_ClientPrintf (cl, PRINT_HIGH, "You were kicked from the game for name spamming\n"); SV_DropClient (cl); return; } } if (cl->state >= cs_spawned && !cl->spectator) SV_BroadcastPrintf (PRINT_HIGH, "%s changed name to %s\n", cl->name, val); } strncpy (cl->name, val, sizeof (cl->name) - 1); // rate command val = Info_ValueForKey (cl->userinfo, "rate"); if (strlen (val)) { i = atoi (val); if ((sv_maxrate->int_val) && (i > sv_maxrate->int_val)) { i = bound (500, i, sv_maxrate->int_val); } else { i = bound (500, i, 10000); } cl->netchan.rate = 1.0 / i; } // msg command val = Info_ValueForKey (cl->userinfo, "msg"); if (strlen (val)) { cl->messagelevel = atoi (val); } cl->stdver = atoi (Info_ValueForKey (cl->userinfo, "stdver")); } //============================================================================ /* SV_InitNet */ void SV_InitNet (void) { int port; int p; port = PORT_SERVER; p = COM_CheckParm ("-port"); if (p && p < com_argc) { port = atoi (com_argv[p + 1]); Con_Printf ("Port: %i\n", port); } NET_Init (port); Netchan_Init (); // heartbeats will allways be sent to the id master svs.last_heartbeat = -99999; // send immediately // NET_StringToAdr ("192.246.40.70:27000", &idmaster_adr); } /* SV_Init */ void SV_Init (void) { COM_InitArgv (host_parms.argc, host_parms.argv); // COM_AddParm ("-game"); // COM_AddParm ("qw"); if (COM_CheckParm ("-minmemory")) host_parms.memsize = MINIMUM_MEMORY; if (host_parms.memsize < MINIMUM_MEMORY) SV_Error ("Only %4.1f megs of memory reported, can't execute game", host_parms.memsize / (float) 0x100000); Memory_Init (host_parms.membase, host_parms.memsize); Cvar_Init (); Sys_Init_Cvars (); Sys_Init (); Cbuf_Init (); Cmd_Init (); SV_InitOperatorCommands (); // execute +set as early as possible Cmd_StuffCmds_f (); Cbuf_Execute_Sets (); // execute the global configuration file if it exists // would have been nice if Cmd_Exec_f could have been used, but it // only reads from within the quake file system, and changing that is // probably Not A Good Thing (tm). fs_globalcfg = Cvar_Get ("fs_globalcfg", FS_GLOBALCFG, CVAR_ROM, "global configuration file"); Cmd_Exec_File (fs_globalcfg->string); Cbuf_Execute_Sets (); // execute +set again to override the config file Cmd_StuffCmds_f (); Cbuf_Execute_Sets (); COM_Filesystem_Init_Cvars (); COM_Init_Cvars (); Mod_Init_Cvars (); Netchan_Init_Cvars (); Pmove_Init_Cvars (); PR_Init_Cvars (); // and now reprocess the cmdline's sets for overrides Cmd_StuffCmds_f (); Cbuf_Execute_Sets (); COM_Init (); PR_Init (); Mod_Init (); SV_InitNet (); SV_InitLocal (); Pmove_Init (); Hunk_AllocName (0, "-HOST_HUNKLEVEL-"); host_hunklevel = Hunk_LowMark (); Cbuf_InsertText ("exec server.cfg\n"); host_initialized = true; // Con_Printf ("Exe: "__TIME__" "__DATE__"\n"); Con_Printf ("%4.1f megabyte heap\n", host_parms.memsize / (1024 * 1024.0)); Con_Printf ("\n%s server, Version %s (build %04d)\n\n", PROGRAM, VERSION, build_number ()); Con_Printf ("<==> %s initialized <==>\n", PROGRAM); // process command line arguments Cmd_StuffCmds_f (); Cbuf_Execute (); // if a map wasn't specified on the command line, spawn start.map if (sv.state == ss_dead) Cmd_ExecuteString ("map start"); if (sv.state == ss_dead) SV_Error ("Couldn't spawn a server"); }