/* * IRC - Internet Relay Chat, ircd/s_misc.c (formerly ircd/date.c) * Copyright (C) 1990 Jarkko Oikarinen and * University of Oulu, Computing Center * * See file AUTHORS in IRC package for additional names of * the programmers. * * 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 1, 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ /** @file * @brief Miscellaneous support functions. * @version $Id: s_misc.c 1818 2007-07-14 02:40:01Z isomer $ */ #include "config.h" #include "s_misc.h" #include "IPcheck.h" #include "channel.h" #include "client.h" #include "hash.h" #include "ircd.h" #include "ircd_alloc.h" #include "ircd_features.h" #include "ircd_log.h" #include "ircd_reply.h" #include "ircd_snprintf.h" #include "ircd_string.h" #include "list.h" #include "match.h" #include "msg.h" #include "numeric.h" #include "numnicks.h" #include "parse.h" #include "querycmds.h" #include "res.h" #include "s_auth.h" #include "s_bsd.h" #include "s_conf.h" #include "s_debug.h" #include "s_stats.h" #include "s_user.h" #include "send.h" #include "struct.h" #include "sys.h" #include "uping.h" #include "userload.h" #include "watch.h" /* #include -- Now using assert in ircd_log.h */ #include #include #include #include #include #include /** Array of English month names (0 = January). */ static char *months[] = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" }; /** Array of English day names (0 = Sunday). */ static char *weekdays[] = { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" }; /* * stats stuff */ /** Global statistics structure. */ static struct ServerStatistics ircst; /** Public pointer to global statistics structure. */ struct ServerStatistics* ServerStats = &ircst; /** Formats a Unix time as a readable string. * @param clock Unix time to format (0 means #CurrentTime). * @return Pointer to a static buffer containing something like * "Sunday January 1 2000 -- 09:30 +01:00" */ char *date(time_t clock) { static char buf[80], plus; struct tm *lt, *gm; struct tm gmbuf; int minswest; if (!clock) clock = CurrentTime; gm = gmtime(&clock); memcpy(&gmbuf, gm, sizeof(gmbuf)); gm = &gmbuf; lt = localtime(&clock); /* There is unfortunately no clean portable way to extract time zone * offset information, so do ugly things. */ minswest = (gm->tm_hour - lt->tm_hour) * 60 + (gm->tm_min - lt->tm_min); if (lt->tm_yday != gm->tm_yday) { if ((lt->tm_yday > gm->tm_yday && lt->tm_year == gm->tm_year) || (lt->tm_yday < gm->tm_yday && lt->tm_year != gm->tm_year)) minswest -= 24 * 60; else minswest += 24 * 60; } plus = (minswest > 0) ? '-' : '+'; if (minswest < 0) minswest = -minswest; sprintf(buf, "%s %s %d %d -- %02d:%02d %c%02d:%02d", weekdays[lt->tm_wday], months[lt->tm_mon], lt->tm_mday, 1900 + lt->tm_year, lt->tm_hour, lt->tm_min, plus, minswest / 60, minswest % 60); return buf; } /** Like ctime() but with no trailing newline. Also, it takes * the time value as parameter, instead of pointer to it. * @param value Unix time to format. * @return Pointer to a static buffer containing formatted time. */ char *myctime(time_t value) { /* Use a secondary buffer in case ctime() would not replace an * overwritten newline. */ static char buf[28]; char *p; strcpy(buf, ctime(&value)); if ((p = strchr(buf, '\n')) != NULL) *p = '\0'; return buf; } /** Return the name of the client for various tracking and admin * purposes. The main purpose of this function is to return the * "socket host" name of the client, if that differs from the * advertised name (other than case). But, this can be used on any * client structure. * @param sptr Client to operate on. * @param showip If non-zero, append [username\@text-ip] to name. * @return Either cli_name(\a sptr) or a static buffer. */ const char* get_client_name(const struct Client* sptr, int showip) { static char nbuf[HOSTLEN * 2 + USERLEN + 5]; if (!MyConnect(sptr) || !showip) return cli_name(sptr); ircd_snprintf(0, nbuf, sizeof(nbuf), "%s[%s@%s]", cli_name(sptr), IsIdented(sptr) ? cli_username(sptr) : "", cli_sock_ip(sptr)); return nbuf; } /** * Exit one client, local or remote. Assuming for local client that * all dependents already have been removed, and socket is closed. * @param bcptr Client being (s)quitted. * @param comment The QUIT comment to send. */ /* Rewritten by Run - 24 sept 94 */ static void exit_one_client(struct Client* bcptr, const char* comment) { struct SLink *lp; struct Ban *bp; if (cli_serv(bcptr) && cli_serv(bcptr)->client_list) /* Was SetServerYXX called ? */ ClearServerYXX(bcptr); /* Removes server from server_list[] */ if (IsUser(bcptr)) { /* * clear out uping requests */ if (IsUPing(bcptr)) uping_cancel(bcptr, 0); /* * Stop a running /LIST clean */ if (MyUser(bcptr) && cli_listing(bcptr)) { MyFree(cli_listing(bcptr)); cli_listing(bcptr) = NULL; } /* * If a person is on a channel, send a QUIT notice * to every client (person) on the same channel (so * that the client can show the "**signoff" message). * (Note: The notice is to the local clients *only*) */ sendcmdto_common_channels_butone(bcptr, CMD_QUIT, NULL, ":%s", comment); remove_user_from_all_channels(bcptr); /* Clean up invitefield */ while ((lp = cli_user(bcptr)->invited)) del_invite(bcptr, lp->value.chptr); /* Clean up silencefield */ while ((bp = cli_user(bcptr)->silence)) { cli_user(bcptr)->silence = bp->next; free_ban(bp); } /* Clean up smarks field */ del_marks(bcptr); /* Clean up watch lists */ if (MyUser(bcptr)) del_list_watch(bcptr); /* Notify Logout */ check_status_watch(bcptr, RPL_LOGOFF); /* Clean up snotice lists */ if (MyUser(bcptr)) set_snomask(bcptr, ~0, SNO_DEL); if (IsInvisible(bcptr)) { assert(UserStats.inv_clients > 0); --UserStats.inv_clients; } if (IsOper(bcptr) && !IsHideOper(bcptr) && !IsChannelService(bcptr) && !IsBot(bcptr)) { assert(UserStats.opers > 0); --UserStats.opers; } if (MyConnect(bcptr)) Count_clientdisconnects(bcptr, UserStats); else Count_remoteclientquits(UserStats, bcptr); } else if (IsServer(bcptr)) { /* Remove downlink list node of uplink */ remove_dlink(&(cli_serv(cli_serv(bcptr)->up))->down, cli_serv(bcptr)->updown); cli_serv(bcptr)->updown = 0; if (MyConnect(bcptr)) Count_serverdisconnects(UserStats); else Count_remoteserverquits(UserStats); } else if (IsMe(bcptr)) { sendto_opmask_butone(0, SNO_OLDSNO, "ERROR: tried to exit me! : %s", comment); return; /* ...must *never* exit self! */ } else if (IsUnknown(bcptr) || IsConnecting(bcptr) || IsHandshake(bcptr)) Count_unknowndisconnects(UserStats); /* * Update IPregistry */ if (IsIPChecked(bcptr)) IPcheck_disconnect(bcptr); /* * Remove from serv->client_list * NOTE: user is *always* NULL if this is a server */ if (cli_user(bcptr)) { assert(!IsServer(bcptr)); /* bcptr->user->server->serv->client_list[IndexYXX(bcptr)] = NULL; */ RemoveYXXClient(cli_user(bcptr)->server, cli_yxx(bcptr)); } /* Remove bcptr from the client list */ #ifdef DEBUGMODE if (hRemClient(bcptr) != 0) Debug((DEBUG_ERROR, "%p !in tab %s[%s] %p %p %p %d %d %p", bcptr, cli_name(bcptr), cli_from(bcptr) ? cli_sockhost(cli_from(bcptr)) : "??host", cli_from(bcptr), cli_next(bcptr), cli_prev(bcptr), cli_fd(bcptr), cli_status(bcptr), cli_user(bcptr))); #else hRemClient(bcptr); #endif remove_client_from_list(bcptr); } /* exit_downlinks - added by Run 25-9-94 */ /** * Removes all clients and downlinks (+clients) of any server * QUITs are generated and sent to local users. * @param cptr server that must have all dependents removed * @param sptr source who thought that this was a good idea * @param comment comment sent as sign off message to local clients */ static void exit_downlinks(struct Client *cptr, struct Client *sptr, char *comment) { struct Client *acptr; struct DLink *next; struct DLink *lp; struct Client **acptrp; int i; /* Run over all its downlinks */ for (lp = cli_serv(cptr)->down; lp; lp = next) { next = lp->next; acptr = lp->value.cptr; /* Remove the downlinks and client of the downlink */ exit_downlinks(acptr, sptr, comment); /* Remove the downlink itself */ exit_one_client(acptr, cli_name(&me)); } /* Remove all clients of this server */ acptrp = cli_serv(cptr)->client_list; for (i = 0; i <= cli_serv(cptr)->nn_mask; ++acptrp, ++i) { if (*acptrp) exit_one_client(*acptrp, comment); } } /* exit_client, rewritten 25-9-94 by Run */ /** * Exits a client of *any* type (user, server, etc) * from this server. Also, this generates all necessary prototol * messages that this exit may cause. * * This function implicitly exits all other clients depending on * this connection. * * For convenience, this function returns a suitable value for * m_function return value: * * CPTR_KILLED if (cptr == bcptr) * 0 if (cptr != bcptr) * * This function can be called in two ways: * 1) From before or in parse(), exiting the 'cptr', in which case it was * invoked as exit_client(cptr, cptr, &me,...), causing it to always * return CPTR_KILLED. * 2) Via parse from a m_function call, in which case it was invoked as * exit_client(cptr, acptr, sptr, ...). Here 'sptr' is known; the client * that generated the message in a way that we can assume he already * did remove acptr from memory himself (or in other cases we don't mind * because he will be delinked.) Or invoked as: * exit_client(cptr, acptr/sptr, &me, ...) when WE decide this one should * be removed. * In general: No generated SQUIT or QUIT should be sent to source link * sptr->from. And CPTR_KILLED should be returned if cptr got removed (too). * * --Run * @param cptr Connection currently being handled by read_message. * @param victim Client being killed. * @param killer Client that made the decision to remove \a victim. * @param comment Reason for the exit. * @return CPTR_KILLED if cptr == bcptr, else 0. */ int exit_client(struct Client *cptr, struct Client* victim, struct Client* killer, const char* comment) { struct Client* acptr = 0; struct DLink *dlp; time_t on_for; char comment1[HOSTLEN + HOSTLEN + 2]; assert(killer); if (MyConnect(victim)) { SetFlag(victim, FLAG_CLOSING); if (feature_bool(FEAT_CONNEXIT_NOTICES) && IsUser(victim)) sendto_opmask_butone_global(&me, SNO_CONNEXIT, "Client exiting: %s (%s@%s) [%s] [%s] <%s%s>", cli_name(victim), cli_user(victim)->username, cli_user(victim)->realhost, comment, ircd_ntoa(&cli_ip(victim)), NumNick(victim) /* two %s's */); update_load(); on_for = CurrentTime - cli_firsttime(victim); if (IsUser(victim) || IsUserPort(victim)) { abort_sasl(victim, 0); auth_send_exit(victim); } if (IsUser(victim)) log_write(LS_USER, L_TRACE, 0, "%Tu %i %s@%s %s %s %s%s %s :%s", cli_firsttime(victim), on_for, cli_user(victim)->username, cli_sockhost(victim), ircd_ntoa(&cli_ip(victim)), cli_account(victim), NumNick(victim), /* two %s's */ cli_name(victim), cli_info(victim)); if (victim != cli_from(killer) /* The source knows already */ && IsClient(victim)) /* Not a Ping struct or Log file */ { if (IsServer(victim) || IsHandshake(victim)) sendcmdto_one(killer, CMD_SQUIT, victim, "%s 0 :%s", cli_name(&me), comment); else if (!IsConnecting(victim)) { if (!IsDead(victim)) { if (IsServer(victim)) sendcmdto_one(killer, CMD_ERROR, victim, ":Closing Link: %s by %s (%s)", cli_name(victim), cli_name(killer), comment); else sendrawto_one(victim, MSG_ERROR " :Closing Link: %s by %s (%s)", cli_name(victim), cli_name(IsServer(killer) ? &his : killer), comment); } } if ((IsServer(victim) || IsHandshake(victim) || IsConnecting(victim)) && (killer == &me || (IsServer(killer) && (strncmp(comment, "Leaf-only link", 14) || strncmp(comment, "Non-Hub link", 12))))) { /* * Note: check user == user needed to make sure we have the same * client */ if (cli_serv(victim)->user && *(cli_serv(victim))->by && (acptr = findNUser(cli_serv(victim)->by))) { if (cli_user(acptr) == cli_serv(victim)->user) { sendcmdto_one(&me, CMD_NOTICE, acptr, "%C :Link with %s canceled: %s", acptr, cli_name(victim), comment); } else { /* * not right client, set by to empty string */ acptr = 0; *(cli_serv(victim))->by = '\0'; } } if (killer == &me) sendto_opmask_butone(acptr, SNO_OLDSNO, "Link with %s canceled: %s", cli_name(victim), comment); } } /* * Close the Client connection first. */ close_connection(victim); } if (IsServer(victim)) { if (feature_bool(FEAT_HIS_NETSPLIT)) strcpy(comment1, "*.net *.split"); else { strcpy(comment1, cli_name(cli_serv(victim)->up)); strcat(comment1, " "); strcat(comment1, cli_name(victim)); } if (IsUser(killer)) sendto_opmask_butone(killer, SNO_OLDSNO, "%s SQUIT by %s [%s]:", (cli_user(killer)->server == victim || cli_user(killer)->server == cli_serv(victim)->up) ? "Local" : "Remote", get_client_name(killer, HIDE_IP), cli_name(cli_user(killer)->server)); else if (killer != &me && cli_serv(victim)->up != killer) sendto_opmask_butone(0, SNO_OLDSNO, "Received SQUIT %s from %s :", cli_name(victim), IsServer(killer) ? cli_name(killer) : get_client_name(killer, HIDE_IP)); sendto_opmask_butone(0, SNO_NETWORK, "Net break: %C %C (%s)", cli_serv(victim)->up, victim, comment); } /* * First generate the needed protocol for the other server links * except the source: */ for (dlp = cli_serv(&me)->down; dlp; dlp = dlp->next) { if (dlp->value.cptr != cli_from(killer) && dlp->value.cptr != victim) { if (IsServer(victim)) sendcmdto_one(killer, CMD_SQUIT, dlp->value.cptr, "%s %Tu :%s", cli_name(victim), cli_serv(victim)->timestamp, comment); else if (IsUser(victim) && !HasFlag(victim, FLAG_KILLED)) sendcmdto_one(victim, CMD_QUIT, dlp->value.cptr, ":%s", comment); } } /* Then remove the client structures */ if (IsServer(victim)) exit_downlinks(victim, killer, comment1); exit_one_client(victim, comment); /* * cptr can only have been killed if it was cptr itself that got killed here, * because cptr can never have been a dependent of victim --Run */ return (cptr == victim) ? CPTR_KILLED : 0; } /** * Exit client with formatted va_list message. * Thin wrapper around exit_client(). * @param cptr Connection being processed. * @param bcptr Connection being closed. * @param sptr Connection who asked to close the victim. * @param pattern Format string for message. * @param vl Stdargs argument list. * @return Has a tail call to exit_client(). */ /* added 25-9-94 by Run */ int vexit_client_msg(struct Client *cptr, struct Client *bcptr, struct Client *sptr, const char *pattern, va_list vl) { char msgbuf[1024]; ircd_vsnprintf(0, msgbuf, sizeof(msgbuf), pattern, vl); return exit_client(cptr, bcptr, sptr, msgbuf); } /** * Exit client with formatted message using a variable-length argument list. * Thin wrapper around exit_client(). * @param cptr Connection being processed. * @param bcptr Connection being closed. * @param sptr Connection who asked to close the victim. * @param pattern Format string for message. * @return Has a tail call to exit_client(). */ int exit_client_msg(struct Client *cptr, struct Client *bcptr, struct Client *sptr, const char *pattern, ...) { va_list vl; char msgbuf[1024]; va_start(vl, pattern); ircd_vsnprintf(0, msgbuf, sizeof(msgbuf), pattern, vl); va_end(vl); return exit_client(cptr, bcptr, sptr, msgbuf); } /** Initialize global server statistics. */ /* (Kind of pointless since C guarantees it's already zero'ed, but... */ void initstats(void) { memset(&ircst, 0, sizeof(ircst)); } /** Report server statistics to a client. * @param cptr Client who wants statistics. * @param sd StatDesc structure being looked up (unused). * @param param Extra parameter passed by user (unused). */ void tstats(struct Client *cptr, const struct StatDesc *sd, char *param) { struct Client *acptr; int i; struct ServerStatistics *sp; struct ServerStatistics tmp; sp = &tmp; memcpy(sp, ServerStats, sizeof(struct ServerStatistics)); for (i = 0; i < MAXCONNECTIONS; i++) { if (!(acptr = LocalClientArray[i])) continue; if (IsServer(acptr)) { sp->is_sbs += cli_sendB(acptr); sp->is_sbr += cli_receiveB(acptr); sp->is_sti += CurrentTime - cli_firsttime(acptr); sp->is_sv++; } else if (IsUser(acptr)) { sp->is_cbs += cli_sendB(acptr); sp->is_cbr += cli_receiveB(acptr); sp->is_cti += CurrentTime - cli_firsttime(acptr); sp->is_cl++; } else if (IsUnknown(acptr)) sp->is_ni++; } send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":accepts %u refused %u", sp->is_ac, sp->is_ref); send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":unknown commands %u prefixes %u", sp->is_unco, sp->is_unpf); send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":nick collisions %u unknown closes %u", sp->is_kill, sp->is_ni); send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":wrong direction %u empty %u", sp->is_wrdi, sp->is_empt); send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":numerics seen %u mode fakes %u", sp->is_num, sp->is_fake); send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":auth successes %u fails %u", sp->is_asuc, sp->is_abad); send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":local connections %u", sp->is_loc); send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":Client server"); send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":connected %u %u", sp->is_cl, sp->is_sv); send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":bytes sent %Lu %Lu", sp->is_cbs, sp->is_sbs); send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":bytes recv %Lu %Lu", sp->is_cbr, sp->is_sbr); send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":time connected %Lu %Lu", sp->is_cti, sp->is_sti); }