/************************************************************************ * IRC - Internet Relay Chat, ircd/s_user.c (formerly ircd/s_msg.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. */ #ifndef lint static const volatile char rcsid[] = "@(#)$Id: s_user.c,v 1.275 2008/06/11 18:27:27 chopin Exp $"; #endif #include "os.h" #include "s_defines.h" #define S_USER_C #include "s_externs.h" #undef S_USER_C static void save_user (aClient *, aClient *, char *); static char buf[BUFSIZE], buf2[BUFSIZE]; static int user_modes[] = { FLAGS_OPER, 'o', FLAGS_LOCOP, 'O', FLAGS_INVISIBLE, 'i', FLAGS_WALLOP, 'w', FLAGS_RESTRICT, 'r', FLAGS_AWAY, 'a', 0, 0 }; /* ** m_functions execute protocol messages on this server: ** ** cptr is always NON-NULL, pointing to a *LOCAL* client ** structure (with an open socket connected!). This ** identifies the physical socket where the message ** originated (or which caused the m_function to be ** executed--some m_functions may call others...). ** ** sptr is the source of the message, defined by the ** prefix part of the message if present. If not ** or prefix not found, then sptr==cptr. ** ** (!IsServer(cptr)) => (cptr == sptr), because ** prefixes are taken *only* from servers... ** ** (IsServer(cptr)) ** (sptr == cptr) => the message didn't ** have the prefix. ** ** (sptr != cptr && IsServer(sptr) means ** the prefix specified servername. (?) ** ** (sptr != cptr && !IsServer(sptr) means ** that message originated from a remote ** user (not local). ** ** combining ** ** (!IsServer(sptr)) means that, sptr can safely ** taken as defining the target structure of the ** message in this server. ** ** *Always* true (if 'parse' and others are working correct): ** ** 1) sptr->from == cptr (note: cptr->from == cptr) ** ** 2) MyConnect(sptr) <=> sptr == cptr (e.g. sptr ** *cannot* be a local connection, unless it's ** actually cptr!). [MyConnect(x) should probably ** be defined as (x == x->from) --msa ] ** ** parc number of variable parameter strings (if zero, ** parv is allowed to be NULL) ** ** parv a NULL terminated list of parameter pointers, ** ** parv[0], sender (prefix string), if not present ** this points to an empty string. ** parv[1]...parv[parc-1] ** pointers to additional parameters ** parv[parc] == NULL, *always* ** ** note: it is guaranteed that parv[0]..parv[parc-1] are all ** non-NULL pointers. */ /* ** next_client ** Local function to find the next matching client. The search ** can be continued from the specified client entry. Normal ** usage loop is: ** ** for (x = client; x = next_client(x,mask); x = x->next) ** HandleMatchingClient; ** ** Parameters: ** aClient *next First client to check ** char *ch Search string (may include wilds) ** */ aClient *next_client(aClient *next, char *ch) { Reg aClient *tmp = next; next = find_client(ch, tmp); if (tmp && tmp->prev == next) return NULL; if (next != tmp) return next; for ( ; next; next = next->next) if (!match(ch,next->name) || !match(next->name,ch)) break; return next; } /* ** hunt_server ** ** Do the basic thing in delivering the message (command) ** across the relays to the specific server (server) for ** actions. ** ** Note: The command is a format string and *MUST* be ** of prefixed style (e.g. ":%s COMMAND %s ..."). ** Command can have only max 8 parameters. ** ** server parv[server] is the parameter identifying the ** target server. ** ** *WARNING* ** parv[server] is replaced with the pointer to the ** real servername from the matched client (I'm lazy ** now --msa). ** ** returns: (see #defines) */ int hunt_server(aClient *cptr, aClient *sptr, char *command, int server, int parc, char *parv[]) { aClient *acptr; /* ** Assume it's me, if no server */ if (parc <= server || BadPtr(parv[server]) || match(ME, parv[server]) == 0 || match(parv[server], ME) == 0) return (HUNTED_ISME); /* ** These are to pickup matches that would cause the following ** message to go in the wrong direction while doing quick fast ** non-matching lookups. */ if ((acptr = find_client(parv[server], NULL))) if (acptr->from == sptr->from && !MyConnect(acptr)) acptr = NULL; /* Match SID */ if (!acptr && (acptr = find_sid(parv[server], NULL))) if (acptr->from == sptr->from && !MyConnect(acptr)) acptr = NULL; /* Match *.masked.servers */ if (!acptr && (acptr = find_server(parv[server], NULL))) if (acptr->from == sptr->from && !MyConnect(acptr)) acptr = NULL; /* Remote services@servers */ if (!acptr && (acptr = find_service(parv[server], NULL))) if (acptr->from == sptr->from && !MyConnect(acptr)) acptr = NULL; if (!acptr) for (acptr = client, (void)collapse(parv[server]); (acptr = next_client(acptr, parv[server])); acptr = acptr->next) { if (acptr->from == sptr->from && !MyConnect(acptr)) continue; /* * Fix to prevent looping in case the parameter for * some reason happens to match someone from the from * link --jto */ if (IsRegistered(acptr) && (acptr != cptr)) break; } if (acptr) { if (!IsRegistered(acptr)) return HUNTED_ISME; if (IsMe(acptr) || MyClient(acptr) || MyService(acptr)) return HUNTED_ISME; if (match(acptr->name, parv[server])) parv[server] = acptr->name; if (IsService(sptr) && (IsServer(acptr->from) && match(sptr->service->dist,acptr->name) != 0 && match(sptr->service->dist,acptr->serv->sid) != 0)) { sendto_one(sptr, replies[ERR_NOSUCHSERVER], ME, BadTo(parv[0]), parv[server]); return(HUNTED_NOSUCH); } sendto_one(acptr, command, parv[0], parv[1], parv[2], parv[3], parv[4], parv[5], parv[6], parv[7], parv[8]); return(HUNTED_PASS); } sendto_one(sptr, replies[ERR_NOSUCHSERVER], ME, BadTo(parv[0]), parv[server]); return(HUNTED_NOSUCH); } /* ** 'do_nick_name' ensures that the given parameter (nick) is ** really a proper string for a nickname (note, the 'nick' ** may be modified in the process...) ** ** RETURNS the length of the final NICKNAME (0, if ** nickname is illegal) ** ** Nickname characters are in range ** 'A'..'}', '_', '-', '0'..'9' ** anything outside the above set will terminate nickname. ** In addition, the first character cannot be '-' or a digit. ** Finally forbid the use of "anonymous" because of possible ** abuses related to anonymous channnels. -kalt ** */ int do_nick_name(char *nick, int server) { Reg char *ch; if (*nick == '-') /* first character '-' */ return 0; if (isdigit(*nick) && !server) /* first character in [0..9] */ return 0; if (strcasecmp(nick, "anonymous") == 0) return 0; #ifdef MINLOCALNICKLEN if (!server && nick[MINLOCALNICKLEN-1] == '\0') return 0; #endif for (ch = nick; *ch && (ch-nick) < (server?NICKLEN:LOCALNICKLEN); ch++) { if (!isvalidnick(*ch)) { break; } } *ch = '\0'; return (ch - nick); } /* ** canonize ** ** reduce a string of duplicate list entries to contain only the unique ** items. Unavoidably O(n^2). */ char *canonize(char *buffer) { static char cbuf[BUFSIZ]; Reg char *s, *t, *cp = cbuf; Reg int l = 0; char *p = NULL, *p2; *cp = '\0'; for (s = strtoken(&p, buffer, ","); s; s = strtoken(&p, NULL, ",")) { if (l) { for (p2 = NULL, t = strtoken(&p2, cbuf, ","); t; t = strtoken(&p2, NULL, ",")) if (!mycmp(s, t)) break; else if (p2) p2[-1] = ','; } else t = NULL; if (!t) { if (l) *(cp-1) = ','; else l = 1; (void)strcpy(cp, s); if (p) cp += (p - s); } else if (p2) p2[-1] = ','; } return cbuf; } /* ** register_user ** This function is called when both NICK and USER messages ** have been accepted for the client, in whatever order. Only ** after this the UNICK message is propagated. */ int register_user(aClient *cptr, aClient *sptr, char *nick, char *username) { Reg aConfItem *aconf; aClient *acptr; anUser *user = sptr->user; char *parv[3]; #ifndef NO_PREFIX char prefix; #endif int i; #ifdef XLINE static char savedusername[USERLEN+1]; strncpyzt(savedusername, username, USERLEN+1); #endif user->last = timeofday; parv[0] = sptr->name; parv[1] = parv[2] = NULL; if (MyConnect(sptr)) { char *reason = NULL; #ifdef RESTRICT_USERNAMES char *lbuf = NULL; #endif #ifdef XLINE aConfItem *xtmp; /* Just for clarification, so there's less confusion: X-lines read from config have their fields stored in aConf in the following fields: host, passwd, name, name2, name3, source_ip. (see s_conf.c/initconf(), look for XLINE); these are used to check against USER and NICK commands parameters during registration: USER 1st 2nd 3rd :4th NICK 5th additionally user ip and/or hostname are being matched against X-line last field (conveniently kept in aconf->source_ip). --B. */ for (xtmp = conf; xtmp; xtmp = xtmp->next) { if (xtmp->status != CONF_XLINE) continue; if (!BadPtr(xtmp->host) && match(xtmp->host, username)) continue; if (!BadPtr(xtmp->passwd) && match(xtmp->passwd, sptr->user2)) continue; if (!BadPtr(xtmp->name) && match(xtmp->name, sptr->user3)) continue; if (!BadPtr(xtmp->name2) && match(xtmp->name2, sptr->info)) continue; if (!BadPtr(xtmp->name3) && match(xtmp->name3, nick)) continue; if (!BadPtr(xtmp->source_ip) && (match(xtmp->source_ip, (sptr->hostp ? sptr->hostp->h_name : sptr->sockhost)) && match(xtmp->source_ip, sptr->user->sip) && strchr(xtmp->source_ip, '/') && match_ipmask(xtmp->source_ip, sptr, 0))) continue; SetXlined(sptr); break; } if (IsXlined(sptr)) { sptr->exitc = EXITC_XLINE; return exit_client(cptr, sptr, &me, XLINE_EXIT_REASON); } #endif #if defined(USE_IAUTH) static time_t last = 0; static u_int count = 0; if (iauth_options & XOPT_EARLYPARSE && DoingXAuth(cptr)) { cptr->flags |= FLAGS_WXAUTH; /* fool check_pings() and give iauth more time! */ cptr->firsttime = timeofday; cptr->lasttime = timeofday; strncpyzt(sptr->user->username, username, USERLEN+1); if (sptr->passwd[0]) sendto_iauth("%d P %s", sptr->fd, sptr->passwd); sendto_iauth("%d U %s", sptr->fd, sptr->user->username); return 1; } if (!DoneXAuth(sptr) && (iauth_options & XOPT_REQUIRED)) { if (iauth_options & XOPT_NOTIMEOUT) { count += 1; if (timeofday - last > 300) { sendto_flag(SCH_AUTH, "iauth may be not running! (refusing new user connections)"); last = timeofday; } sptr->exitc = EXITC_AUTHFAIL; } else sptr->exitc = EXITC_AUTHTOUT; return exit_client(cptr, cptr, &me, "Authentication failure! - no iauth?"); } if (timeofday - last > 300 && count) { sendto_flag(SCH_AUTH, "%d users rejected.", count); count = 0; } /* this should not be needed, but there's a bug.. -kalt */ /* haven't seen any notice like this, ever.. no bug no more? */ if (*cptr->username == '\0') { sendto_flag(SCH_AUTH, "Ouch! Null username for %s (%d %X)", get_client_name(cptr, TRUE), cptr->fd, cptr->flags); sendto_iauth("%d E Null username [%s] %X", cptr->fd, get_client_name(cptr, TRUE), cptr->flags); return exit_client(cptr, sptr, &me, "Fatal Bug - Try Again"); } #endif #ifdef RESTRICT_USERNAMES /* ** Do not allow special chars in the username. */ if ((sptr->flags & FLAGS_GOTID) && ! (*sptr->username == '-' || index(sptr->username, '@'))) { /* got ident and it is not OTHER * (which could be encrypted), so check * this one for validity */ lbuf = sptr->username; } else { /* either no ident or ident OTHER */ lbuf = username; } if (!isvalidusername(lbuf)) { ircstp->is_ref++; sendto_flag(SCH_LOCAL, "Invalid username: %s@%s.", lbuf, sptr->sockhost); sptr->exitc = EXITC_REF; return exit_client(cptr, sptr, &me, "Invalid username"); } #endif /* ** the following insanity used to be after check_client() ** but check_client()->attach_Iline() now needs to know the ** username for global u@h limits. ** moving this shit here shouldn't be a problem. -krys ** what a piece of $#@!.. restricted can only be known ** *after* attach_Iline(), so it matters and I have to move ** come of it back below. so global u@h limits really suck. */ #ifndef NO_PREFIX /* ** ident is fun.. ahem ** prefixes used: ** none I line with ident ** ^ I line with OTHER type ident ** ~ I line, no ident ** + i line with ident ** = i line with OTHER type ident ** - i line, no ident */ if (!(sptr->flags & FLAGS_GOTID)) prefix = '~'; else if (*sptr->username == '-' || index(sptr->username, '@')) prefix = '^'; else prefix = '\0'; /* OTHER type idents have '-' prefix (from s_auth.c), */ /* and they are not supposed to be used as userid (rfc1413) */ /* @ isn't valid in usernames (m_user()) */ if (sptr->flags & FLAGS_GOTID && *sptr->username != '-' && index(sptr->username, '@') == NULL) strncpyzt(buf2, sptr->username, USERLEN+1); else /* No ident, or unusable ident string */ /* because username may point to user->username */ strncpyzt(buf2, username, USERLEN+1); if (prefix) { *user->username = prefix; strncpy(&user->username[1], buf2, USERLEN); } else strncpy(user->username, buf2, USERLEN+1); user->username[USERLEN] = '\0'; /* eos */ #else strncpyzt(user->username, username, USERLEN+1); #endif if (sptr->exitc == EXITC_AREF || sptr->exitc == EXITC_AREFQ) { if (sptr->exitc == EXITC_AREF) sendto_flag(SCH_LOCAL, "Denied connection from %s.", get_client_host(sptr)); return exit_client(cptr, cptr, &me, sptr->reason ? sptr->reason : "Denied access"); } if ((i = check_client(sptr))) { struct msg_set { char shortm; char *longm; }; #define EXIT_MSG_COUNT 8 static struct msg_set exit_msg[EXIT_MSG_COUNT] = { { EXITC_BADPASS, "Bad password" }, { EXITC_GUHMAX, "Too many user connections (global)" }, { EXITC_GHMAX, "Too many host connections (global)" }, { EXITC_LUHMAX, "Too many user connections (local)" }, { EXITC_LHMAX, "Too many host connections (local)" }, { EXITC_YLINEMAX, "Too many connections" }, { EXITC_NOILINE, "Unauthorized connection" }, { EXITC_FAILURE, "Connect failure" } }; if (i > -1) { i = -1; } i += EXIT_MSG_COUNT; if (i > EXIT_MSG_COUNT) { i = EXIT_MSG_COUNT; } #undef EXIT_MSG_COUNT ircstp->is_ref++; sptr->exitc = exit_msg[i].shortm; if (exit_msg[i].shortm != EXITC_BADPASS) { sendto_flag(SCH_LOCAL, "%s from %s.", exit_msg[i].longm, get_client_host(sptr)); } return exit_client(cptr, cptr, &me, exit_msg[i].longm); } #ifndef NO_PREFIX if (IsRestricted(sptr)) { if (!(sptr->flags & FLAGS_GOTID)) prefix = '-'; else if (*sptr->username == '-' || index(sptr->username, '@')) prefix = '='; else prefix = '+'; *user->username = prefix; strncpy(&user->username[1], buf2, USERLEN); user->username[USERLEN] = '\0'; } #endif aconf = sptr->confs->value.aconf; #ifdef UNIXPORT if (IsUnixSocket(sptr)) { strncpyzt(user->host, me.sockhost, HOSTLEN+1); } else #endif { if (IsConfNoResolveMatch(aconf)) { /* sockhost contains resolved hostname (if any), * which we'll use in match_modeid to match. */ strncpyzt(user->host, user->sip, HOSTLEN+1); } else { strncpyzt(user->host, sptr->sockhost, HOSTLEN+1); } } /* hmpf, why that? --B. */ /* so already authenticated clients don't have password ** kept in ircd memory? --B. */ bzero(sptr->passwd, sizeof(sptr->passwd)); /* * following block for the benefit of time-dependent K:-lines * how come "time-dependant"? I don't see it. --B. */ if (!IsKlineExempt(sptr) && find_kill(sptr, 0, &reason)) { sendto_flag(SCH_LOCAL, "K-lined %s@%s.", user->username, sptr->sockhost); ircstp->is_ref++; sptr->exitc = EXITC_KLINE; if (reason) sprintf(buf, "K-lined: %.80s", reason); return exit_client(cptr, sptr, &me, (reason) ? buf : "K-lined"); } } else { /* Received from other server in UNICK */ strncpyzt(user->username, username, USERLEN+1); } SetClient(sptr); if (!MyConnect(sptr)) { acptr = find_server(user->server, NULL); if (acptr && acptr->from != cptr) { /* I think this is not possible anymore. --B. */ sendto_one(cptr, ":%s KILL %s :%s (%s != %s[%s])", ME, sptr->name, ME, user->server, acptr->from->name, acptr->from->sockhost); sptr->flags |= FLAGS_KILLED; return exit_client(cptr, sptr, &me, "UNICK server wrong direction"); } send_umode(NULL, sptr, 0, SEND_UMODES, buf); } /* below !MyConnect, as it can remove user */ if (IsInvisible(sptr)) /* Can be initialized in m_user() */ { istat.is_user[1]++; /* Local and server defaults +i */ user->servp->usercnt[1]++; } else { user->servp->usercnt[0]++; istat.is_user[0]++; } check_split(); if ((istat.is_user[1] + istat.is_user[0]) > istat.is_m_users) { istat.is_m_users = istat.is_user[1] + istat.is_user[0]; if (timeofday - istat.is_m_users_t >= CLCHSEC) { sendto_flag(SCH_NOTICE, "New highest global client connection: %d", istat.is_m_users); istat.is_m_users_t = timeofday; } } if (MyConnect(sptr)) { char **isup; istat.is_unknown--; istat.is_myclnt++; if (istat.is_myclnt > istat.is_m_myclnt) { istat.is_m_myclnt = istat.is_myclnt; if (timeofday - istat.is_m_myclnt_t >= CLCHSEC) { sendto_flag(SCH_NOTICE, "New highest local client " "connection: %d", istat.is_m_myclnt); istat.is_m_myclnt_t = timeofday; } } if (istat.is_myclnt % CLCHNO == 0 && istat.is_myclnt != istat.is_l_myclnt) { sendto_flag(SCH_NOTICE, "Local %screase from %d to %d clients " "in %d seconds", istat.is_myclnt>istat.is_l_myclnt?"in":"de", istat.is_l_myclnt, istat.is_myclnt, timeofday - istat.is_l_myclnt_t); istat.is_l_myclnt_t = timeofday; istat.is_l_myclnt = istat.is_myclnt; } strcpy(sptr->user->uid, next_uid()); if (nick[0] == '0' && nick[1] == '\0') { strncpyzt(nick, sptr->user->uid, UIDLEN + 1); (void)strcpy(sptr->name, nick); (void)add_to_client_hash_table(nick, sptr); } # if defined(CLIENTS_CHANNEL) && (CLIENTS_CHANNEL_LEVEL & CCL_CONN) sendto_flag(SCH_CLIENT, "%s %s %s %s CONN %s" # if (CLIENTS_CHANNEL_LEVEL & CCL_CONNINFO) # ifdef XLINE " %s %s %s" # endif " :%s" # endif , user->uid, nick, user->username, user->host, user->sip # if (CLIENTS_CHANNEL_LEVEL & CCL_CONNINFO) # ifdef XLINE , savedusername, sptr->user2, sptr->user3 # endif , sptr->info # endif ); #endif sprintf(buf, "%s!%s@%s", nick, user->username, user->host); add_to_uid_hash_table(sptr->user->uid, sptr); sptr->exitc = EXITC_REG; sendto_one(sptr, replies[RPL_WELCOME], ME, BadTo(nick), buf); /* This is a duplicate of the NOTICE but see below...*/ sendto_one(sptr, replies[RPL_YOURHOST], ME, BadTo(nick), get_client_name(&me, FALSE), version); sendto_one(sptr, replies[RPL_CREATED], ME, BadTo(nick), creation); sendto_one(sptr, replies[RPL_MYINFO], ME, BadTo(parv[0]), ME, version); isup = isupport; while (*isup) { sendto_one(sptr,replies[RPL_ISUPPORT], ME, BadTo(parv[0]), *isup); isup++; } sendto_one(sptr, replies[RPL_YOURID], ME, BadTo(parv[0]), sptr->user->uid); (void)m_lusers(sptr, sptr, 1, parv); (void)m_motd(sptr, sptr, 1, parv); if (IsRestricted(sptr)) sendto_one(sptr, replies[ERR_RESTRICTED], ME, BadTo(nick)); if (IsConfNoResolve(sptr->confs->value.aconf)) { sendto_one(sptr, ":%s NOTICE %s :Due to an administrative" " decision, your hostname is not shown.", ME, nick); } else if (IsConfNoResolveMatch(sptr->confs->value.aconf)) { sendto_one(sptr, ":%s NOTICE %s :Due to an administrative" " decision, your hostname is not shown," " but still matches channel MODEs.", ME, nick); } send_umode(sptr, sptr, 0, ALL_UMODES, buf); nextping = timeofday; #ifdef SPLIT_CONNECT_NOTICE if (IsSplit()) { sendto_one(sptr, ":%s NOTICE %s :%s", ME, nick, SPLIT_CONNECT_NOTICE); } #endif } for (i = fdas.highest; i >= 0; i--) { /* Find my leaf servers and feed the new client to them */ if (!(acptr = local[fdas.fd[i]]) || !IsServer(acptr) || acptr == cptr || IsMe(acptr)) { continue; } sendto_one(acptr, ":%s UNICK %s %s %s %s %s %s :%s", user->servp->sid, nick, user->uid, user->username, user->host, user->sip, (*buf) ? buf : "+", sptr->info); } /* for(my-leaf-servers) */ #ifdef USE_SERVICES #if 0 check_services_butone(SERVICE_WANT_NICK, user->servp, NULL, "NICK %s :%d", nick, sptr->hopcount+1); check_services_butone(SERVICE_WANT_USER, user->servp, sptr, ":%s USER %s %s %s :%s", nick, user->username, user->host, user->server, sptr->info); if (MyConnect(sptr)) /* all modes about local users */ send_umode(NULL, sptr, 0, ALL_UMODES, buf); check_services_butone(SERVICE_WANT_UMODE, user->servp, sptr, ":%s MODE %s :%s", nick, nick, buf); #endif if (MyConnect(sptr)) /* all modes about local users */ send_umode(NULL, sptr, 0, ALL_UMODES, buf); check_services_num(sptr, buf); #endif #ifdef USE_HOSTHASH add_to_hostname_hash_table(user->host, user); #endif #ifdef USE_IPHASH add_to_ip_hash_table(user->sip, user); #endif return 1; } /* ** m_nick ** parv[0] = sender prefix ** parv[1] = nickname */ int m_nick(aClient *cptr, aClient *sptr, int parc, char *parv[]) { aClient *acptr; int delayed = 0; char nick[NICKLEN+2], *user, *host; Link *lp = NULL; int allowednicklen; if (MyConnect(cptr) && IsUnknown(cptr) && IsConfServeronly(cptr->acpt->confs->value.aconf)) { sendto_flag(SCH_LOCAL, "User connection to server-only P-line " "from %s", get_client_host(cptr)); find_bounce(cptr, -1, -1); return exit_client(cptr, cptr, &me, "Server only port"); } if (IsService(sptr)) { sendto_one(sptr, replies[ERR_ALREADYREGISTRED], ME, BadTo(parv[0])); return 1; } /* local clients' nick size can be LOCALNICKLEN max */ allowednicklen = MyConnect(sptr) ? LOCALNICKLEN : NICKLEN; strncpyzt(nick, parv[1], allowednicklen + 1); if (IsServer(cptr)) { if (parc != 2) { char buf[BUFSIZE]; int k; badparamcountkills: sendto_flag(SCH_NOTICE, "Bad NICK param count (%d) for %s from %s via %s", parc, parv[1], sptr->name, get_client_name(cptr, FALSE)); sendto_one(cptr, ":%s KILL %s :%s (Bad NICK %d)", ME, nick, ME, parc); buf[0] = '\0'; for (k = 1; k < parc; k++) { strcat(buf, " "); strcat(buf, parv[k]); } sendto_flag(SCH_ERROR, "Bad NICK param count (%d) from %s via %s: %s NICK%s", parc, sptr->name, get_client_name(cptr, FALSE), parv[0], buf[0] ? buf : ""); return 0; } else /* parc == 2 */ { /* :old NICK new */ user = sptr->user->username; host = sptr->user->host; } } else { if (sptr->user) { user = sptr->user->username; host = sptr->user->host; } else user = host = ""; } /* Only local unregistered clients, I hope. --B. */ if (MyConnect(sptr) && IsUnknown(sptr) && nick[0] == '0' && nick[1] == '\0') { /* Allow registering with nick "0", this will be ** overwritten in register_user() */ #ifdef DISABLE_NICK0_REGISTRATION sendto_one(sptr, replies[ERR_ERRONEOUSNICKNAME], ME, BadTo(parv[0]), nick); return 2; #else goto nickkilldone; #endif } if (MyPerson(sptr)) { if (!strcmp(sptr->name, nick)) { /* ** This is just ':old NICK old' type thing. ** Just forget the whole thing here. There is ** no point forwarding it to anywhere. */ return 2; /* NICK Message ignored */ } /* "NICK 0" or "NICK UID" received */ if ((nick[0] == '0' && nick[1] == '\0') || !mycmp(nick, sptr->user->uid)) { /* faster equivalent of ** !strcmp(sptr->name, sptr->user->uid) */ if (isdigit(sptr->name[0])) { /* user nick is already an UID */ return 2; /* NICK message ignored */ } else { /* user changing his nick to UID */ strncpyzt(nick, sptr->user->uid, UIDLEN + 1); goto nickkilldone; } } } if (IsServer(cptr) && isdigit(nick[0]) && !strncasecmp(me.serv->sid, nick, SIDLEN)) { /* Remote server send us remote user changing his nick ** to uid-like with our! sid. Burn the bastard. --B. */ sendto_flag(SCH_KILL, "Bad SID Nick Prefix: %s From: %s %s", parv[1], parv[0], get_client_name(cptr, FALSE)); sendto_serv_butone(NULL, ":%s KILL %s :%s (%s[%s] != %s)", me.name, sptr->name, me.name, sptr->name, sptr->from->name, get_client_name(cptr, TRUE)); sptr->flags |= FLAGS_KILLED; (void) exit_client(NULL, sptr, &me, "Fake SID Nick Prefix"); return exit_client(NULL, cptr, &me, "Fake SID Nick Prefix"); } /* * if do_nick_name() returns a null name OR if the server sent a nick * name and do_nick_name() changed it in some way (due to rules of nick * creation) then reject it. If from a server and we reject it, * we have to KILL it. -avalon 4/4/92 */ if (do_nick_name(nick, IsServer(cptr)) == 0 || strncmp(nick, parv[1], allowednicklen)) { sendto_one(sptr, replies[ERR_ERRONEOUSNICKNAME], ME, BadTo(parv[0]), parv[1]); if (IsServer(cptr)) { ircstp->is_kill++; sendto_flag(SCH_KILL, "Bad Nick: %s From: %s %s", parv[1], parv[0], get_client_name(cptr, FALSE)); sendto_one(cptr, ":%s KILL %s :%s (%s <- %s[%s])", ME, parv[1], ME, parv[1], nick, cptr->name); if (sptr != cptr) /* bad nick change */ { sendto_serv_butone(cptr, ":%s KILL %s :%s (%s <- %s!%s@%s)", ME, parv[0], ME, get_client_name(cptr, FALSE), parv[0], user, host); sptr->flags |= FLAGS_KILLED; return exit_client(cptr,sptr,&me,"BadNick"); } } return 2; } if (!(acptr = find_client(nick, NULL))) { aClient *acptr2; if (IsServer(cptr) || !(bootopt & BOOT_PROT)) goto nickkilldone; if ((acptr2 = get_history(nick, (long)(KILLCHASETIMELIMIT))) && !MyConnect(acptr2)) /* ** Lock nick for KCTL so one cannot nick collide ** (due to kill chase) people who recently changed ** their nicks. --Beeth */ delayed = 1; else /* ** Let ND work */ delayed = find_history(nick, (long)(DELAYCHASETIMELIMIT)); if (!delayed) goto nickkilldone; /* No collisions, all clear... */ } /* ** If acptr == sptr, then we have a client doing a nick ** change between *equivalent* nicknames as far as server ** is concerned (user is changing the case of his/her ** nickname or somesuch) */ if (acptr == sptr) { /* ** Allows change of case in his/her nick */ goto nickkilldone; /* -- go and process change */ } /* ** Note: From this point forward it can be assumed that ** acptr != sptr (points to different client structures). */ /* ** If the older one is "non-person", the new entry is just ** allowed to overwrite it. Just silently drop non-person, ** and proceed with the nick. This should take care of the ** "dormant nick" way of generating collisions... */ if (acptr && IsUnknown(acptr) && MyConnect(acptr)) { (void) exit_client(acptr, acptr, &me, "Overridden"); goto nickkilldone; } /* ** Decide, we really have a nick collision and deal with it */ if (!IsServer(cptr)) { /* ** NICK is coming from local client connection. Just ** send error reply and ignore the command. */ sendto_one(sptr, replies[(delayed) ? ERR_UNAVAILRESOURCE : ERR_NICKNAMEINUSE], ME, BadTo(parv[0]), nick); return 2; /* NICK message ignored */ } /* ** NICK was coming from a server connection. Means that the same ** nick is registered for different users by different server. ** This is either a race condition (two users coming online about ** same time, or net reconnecting) or just two net fragments becoming ** joined and having same nicks in use. We cannot have TWO users with ** same nick--purge this NICK from the system with a KILL... >;) ** ** Since 2.11, we SAVE both users, not KILL. */ /* ** This seemingly obscure test (sptr == cptr) differentiates ** between "NICK new" (TRUE) and ":old NICK new" (FALSE) forms. */ if (sptr == cptr) { /* 2.11+ do not introduce clients with NICK. --B. */ goto badparamcountkills; } /* ** Since it's not a new client, it must have an UID here, ** so SAVE them both. */ /* assert(sptr->user!=NULL); assert(acptr->user!=NULL); */ { char path[BUFSIZE]; /* Save acptr */ sprintf(path, "(%s@%s[%s](%s) <- %s@%s[%s])", acptr->user->username, acptr->user->host, acptr->from->name, acptr->name, user, host, cptr->name); save_user(NULL, acptr, path); /* Save sptr */ sprintf(path, "(%s@%s[%s] <- %s@%s[%s](%s))", acptr->user->username, acptr->user->host, acptr->from->name, user, host, cptr->name, sptr->name); save_user(NULL, sptr, path); /* Everything is done */ ircstp->is_save++; return 2; } nickkilldone: if (IsServer(sptr)) { /* 2.11+ do not introduce clients with NICK. --B. */ goto badparamcountkills; } else if (sptr->name[0]) /* NICK received before, changing */ { if (MyConnect(sptr)) { if (!IsPerson(sptr)) /* Unregistered client */ return 2; /* Ignore new NICKs */ /* ** Restricted clients cannot change nicks ** with exception of changing nick from SAVEd UID. ** We could check for this earlier, so we would not ** do all those checks, just return error. --Beeth */ if (IsRestricted(sptr) && !isdigit(*parv[0])) { sendto_one(sptr, replies[ERR_RESTRICTED], ME, BadTo(parv[0])); return 2; } /* Can the user speak on all channels? */ for (lp = sptr->user->channel; lp; lp = lp->next) if (can_send(sptr, lp->value.chptr) && !IsQuiet(lp->value.chptr)) break; /* If (lp), we give bigger penalty at the end. */ #ifdef DISABLE_NICKCHANGE_WHEN_BANNED if (lp) { sendto_one(sptr, replies[ERR_CANNOTSENDTOCHAN], ME, BadTo(parv[0]), lp->value.chptr->chname); return 2; } #endif } /* ** Client just changing his/her nick. If he/she is ** on a channel, send note of change to all clients ** on that channel. Propagate notice to other servers. */ sendto_common_channels(sptr, ":%s NICK :%s", parv[0], nick); #if defined(CLIENTS_CHANNEL) && (CLIENTS_CHANNEL_LEVEL & CCL_NICK) if (MyConnect(sptr)) sendto_flag(SCH_CLIENT, "%s %s %s %s NICK %s", sptr->user->uid, parv[0], sptr->user->username, sptr->user->host, nick); #endif if (sptr->user) /* should always be true.. */ { add_history(sptr, sptr); #ifdef USE_SERVICES check_services_butone(SERVICE_WANT_NICK, sptr->user->servp, sptr, ":%s NICK :%s", parv[0], nick); #endif } else sendto_flag(SCH_NOTICE, "Illegal NICK change: %s -> %s from %s", parv[0], nick, get_client_name(cptr,TRUE)); sendto_serv_butone(cptr, ":%s NICK :%s", sptr->user->uid, nick); if (sptr->name[0]) (void)del_from_client_hash_table(sptr->name, sptr); (void)strcpy(sptr->name, nick); } else { /* Client setting NICK the first time */ /* This had to be copied here to avoid problems.. */ (void)strcpy(sptr->name, nick); if (sptr->user) { /* ** USER already received, now we have NICK. ** *NOTE* For servers "NICK" *must* precede the ** user message (giving USER before NICK is possible ** only for local client connection!). register_user ** may reject the client and call exit_client for it ** --must test this and exit m_nick too!!! */ if (register_user(cptr, sptr, nick, sptr->user->username) == FLUSH_BUFFER) return FLUSH_BUFFER; } /* If we returned from register_user, then the user registered ** and sptr->name is not "0" anymore; add_to_client_hash_table ** (few lines down) would be called second time for that client ** because register_user does that for "NICK 0" after copying ** UID onto client nick. ** OTOH, if no USER was yet received, isdigit is true only for ** client trying to register with "NICK 0". As we would have ** returned without adding "0" to client hash table anyway, ** we can safely return here. --B. */ if (isdigit(sptr->name[0])) { return 3; } } /* Registered client doing "NICK 0" already has UID in sptr->name. ** If sptr->name is "0" here, it means there was no "USER" (thanks ** to that fiction's "isdigit" check above after register_user), so ** do not add_to_client_hash_table with nick "0", let register_user ** fill in UID first and add that to client hash table. --B. */ if (sptr->name[0] != '0' || sptr->name[1] != '\0') { /* Finally set new nick name. */ (void)add_to_client_hash_table(nick, sptr); } if (lp) return 15; else return 3; } /* ** m_unick ** parv[0] = sender prefix ** parv[1] = nickname ** parv[2] = uid ** parv[3] = username (login name, account) ** parv[4] = client host name ** parv[5] = client ip ** parv[6] = users mode ** parv[7] = users real name info */ int m_unick(aClient *cptr, aClient *sptr, int parc, char *parv[]) { aClient *acptr; char *uid, nick[NICKLEN+2], *user, *host, *realname; strncpyzt(nick, parv[1], NICKLEN+1); uid = parv[2]; user = parv[3]; host = parv[4]; realname = parv[7]; /* * if do_nick_name() returns a null name OR if the server sent a nick * name and do_nick_name() changed it in some way (due to rules of nick * creation) then reject it. If from a server and we reject it, * and KILL it. -avalon 4/4/92 */ if (do_nick_name(nick, 1) == 0 || strcmp(nick, parv[1])) { sendto_one(sptr, replies[ERR_ERRONEOUSNICKNAME], ME, BadTo(parv[0]), parv[1]); ircstp->is_kill++; sendto_flag(SCH_KILL, "Bad UNick: %s From: %s %s", parv[1], parv[0], get_client_name(cptr, FALSE)); sendto_one(cptr, ":%s KILL %s :%s (%s <- %s[%s])", ME, uid, ME, parv[1], nick, cptr->name); return 2; } /* ** Check validity of UID. */ if (!check_uid(uid, sptr->serv->sid)) { /* This is so bad, that I really don't want to deal with it! */ sendto_ops_butone(NULL, ME, "Bad UID (%s) from %s", uid, get_client_name(cptr, FALSE)); return exit_client(cptr, cptr, &me, "Bad UID"); } /* ** Check against UID collisions, ** they should never happen, but never say never. */ acptr = find_uid(uid, NULL); if (acptr) { /* This is so bad, that I really don't want to deal with it! */ sendto_ops_butone(NULL, ME, "UID collision for %s from %s", uid, get_client_name(cptr, FALSE)); return exit_client(cptr, cptr, &me, "UID collision"); } /* ** Check against NICK collisions, ** and if possible save the two users. */ acptr = find_client(nick, NULL); if (acptr) { /* ** If the older one is "non-person", the new entry is just ** allowed to overwrite it. Just silently drop non-person, ** and proceed with the unick. */ if (IsUnknown(acptr) && MyConnect(acptr)) { (void) exit_client(acptr, acptr, &me, "Overridden"); } else /* ** Ouch, this new client is trying to take an already ** existing nickname.. */ if (*acptr->user->uid) { char path[BUFSIZE]; /* both users have a UID, save them */ /* Save the other user. Send it to all servers. */ sprintf(path, "(%s@%s)%s <- (%s@%s)%s", acptr->user->username, acptr->user->host, acptr->user->server, user, host, cptr->name); save_user(NULL, acptr, path); /* ** We need to send a SAVE for the new user back. ** It isn't introduced yet, so we can't just call ** save_user(). */ sendto_one(cptr, ":%s SAVE %s :%s (%s@%s)%s <- (%s@%s)%s", me.serv->sid, uid, ME, acptr->user->username, acptr->user->host, acptr->user->server, user, host, cptr->name); /* Just introduce him with the uid to the rest. */ strcpy(nick, uid); ircstp->is_save++; } else { /* ** sadly, both have to be killed because: ** - we cannot rely on cptr do kill acptr ** as the new user introduced here may have changed ** nicknames before the collision happens on cptr ** - sending a kill to cptr means nick chasing will ** get to the new user introduced here. */ sendto_one(acptr, replies[ERR_NICKCOLLISION], ME, BadTo(acptr->name), acptr->name, user, host); sendto_flag(SCH_KILL, "Nick collision on %s (%s@%s)%s <- (%s@%s)%s", acptr->name, (acptr->user)?acptr->user->username:"???", (acptr->user) ? acptr->user->host : "???", acptr->from->name, user, host, get_client_name(cptr, FALSE)); ircstp->is_kill++; sendto_serv_butone(NULL, ":%s KILL %s :%s ((%s@%s)%s <- (%s@%s)%s)", ME, acptr->name, ME, (acptr->user) ? acptr->user->username:"???", (acptr->user) ? acptr->user->host : "???", acptr->from->name, user, host, get_client_name(cptr, FALSE)); acptr->flags |= FLAGS_KILLED; return exit_client(NULL, acptr, &me, "Nick collision"); } } /* ** the following is copied from m_user() as we need only ** few things from it here, as we assume (should we?) it ** is all ok since UNICK can come only from other server */ acptr = make_client(cptr); add_client_to_list(acptr); (void)make_user(acptr, strlen(parv[5])); /* more corrrect is this, but we don't yet have ->mask, so... acptr->user->servp = find_server_name(sptr->serv->mask->serv->snum); ... just remember to change it one day --Beeth */ acptr->user->servp = sptr->serv; sptr->serv->refcnt++; acptr->user->server = find_server_string(sptr->serv->snum); if (strlen(realname) > REALLEN) { realname[REALLEN] = '\0'; } acptr->info = mystrdup(realname); strncpyzt(acptr->user->username, parv[3], USERLEN+1); strncpyzt(acptr->user->host, host, sizeof(acptr->user->host)); reorder_client_in_list(acptr); /* ** NOTE: acptr->name has to be set *after* calling m_user(); ** else it will already introduce the client which ** can't have the uid set yet. ** the extended m_nick() does things the other way around.. ** I hope this will not cause trouble sometime later. -kalt ** You could do things like m_nick(), but you then you should ** stop it from making a call to register_user(). */ /* The nick is already checked for size, and is a local var. */ strcpy(acptr->name, nick); add_to_client_hash_table(nick, acptr); /* we don't have hopcount in unick, we take it from sptr */ acptr->hopcount = sptr->hopcount; /* The client is already killed if the uid is too long. */ strcpy(acptr->user->uid, uid); strcpy(acptr->user->sip, parv[5]); add_to_uid_hash_table(uid, acptr); { char *pv[4]; pv[0] = ME; pv[1] = acptr->name; pv[2] = parv[6]; pv[3] = NULL; m_umode(NULL, acptr, 3, pv); } register_user(cptr, acptr, nick, user); return 0; } /* ** m_message (used in m_private() and m_notice()) ** the general function to deliver MSG's between users/channels ** ** parv[0] = sender prefix ** parv[1] = receiver list ** parv[2] = message text ** ** massive cleanup ** rev argv 6/91 ** */ static int m_message(aClient *cptr, aClient *sptr, int parc, char *parv[], int notice) { Reg aClient *acptr; Reg char *s; aChannel *chptr; char *nick, *server, *p, *cmd, *user, *host; int count = 0, penalty = 0, syntax = 0; cmd = notice ? "NOTICE" : "PRIVMSG"; if (MyConnect(sptr)) parv[1] = canonize(parv[1]); for (p = NULL, nick = strtoken(&p, parv[1], ","); nick; nick = strtoken(&p, NULL, ","), penalty++) { /* ** restrict destination list to MAXPENALTY/2 recipients to ** solve SPAM problem --Yegg */ if (2*penalty >= MAXPENALTY) { if (!notice) sendto_one(sptr, replies[ERR_TOOMANYTARGETS], ME, BadTo(parv[0]), "Too many",nick,"No Message Delivered"); continue; } /* ** nickname addressed? */ if (((IsServer(cptr) || IsService(cptr)) && (acptr = find_uid(nick, NULL))) || (acptr = find_person(nick, NULL))) { if (!notice && MyConnect(sptr) && acptr->user && (acptr->user->flags & FLAGS_AWAY)) send_away(sptr, acptr); sendto_prefix_one(acptr, sptr, ":%s %s %s :%s", parv[0], cmd, acptr->name, parv[2]); continue; } /* ** channel msg? */ if ((IsPerson(sptr) || IsService(sptr) || IsServer(sptr)) && (chptr = find_channel(nick, NullChn))) { if (can_send(sptr, chptr) == 0 || IsServer(sptr)) sendto_channel_butone(cptr, sptr, chptr, ":%s %s %s :%s", parv[0], cmd, nick, parv[2]); else if (!notice) sendto_one(sptr, replies[ERR_CANNOTSENDTOCHAN], ME, BadTo(parv[0]), nick); continue; } /* ** the following two cases allow masks in NOTICEs ** (for OPERs only) ** ** Armin, 8Jun90 (gruner@informatik.tu-muenchen.de) ** ** NOTE: 2.11 changed syntax from $/#-mask to $$/$#-mask */ if (IsAnOper(sptr)) { if (*nick == '$') { if (*(nick+1) == '$') { syntax = MATCH_SERVER; } else if (*(nick+1) == '#') { syntax = MATCH_HOST; } } } if (syntax) { if (!(s = (char *)rindex(nick, '.'))) { sendto_one(sptr, replies[ERR_NOTOPLEVEL], ME, BadTo(parv[0]), nick); continue; } while (*++s) if (*s == '.' || *s == '*' || *s == '?') break; if (*s == '*' || *s == '?') { sendto_one(sptr, replies[ERR_WILDTOPLEVEL], ME, BadTo(parv[0]), nick); continue; } sendto_match_butone( IsServer(cptr) ? cptr : NULL, sptr, nick + 2, syntax, ":%s %s %s :%s", parv[0], cmd, nick, parv[2]); continue; } /* syntax */ /* ** nick!user@host addressed? */ if ((user = (char *)index(nick, '!')) && (host = (char *)index(nick, '@'))) { *user = '\0'; *host = '\0'; if ((acptr = find_person(nick, NULL)) && !mycmp(user+1, acptr->user->username) && !mycmp(host+1, acptr->user->host)) { sendto_prefix_one(acptr, sptr, ":%s %s %s :%s", parv[0], cmd, nick, parv[2]); *user = '!'; *host = '@'; continue; } *user = '!'; *host = '@'; } /* ** user[%host]@server addressed? */ if ((server = (char *)index(nick, '@')) && (acptr = find_server(server + 1, NULL))) { /* ** Not destined for a user on me :-( */ if (!IsMe(acptr)) { sendto_one(acptr,":%s %s %s :%s", parv[0], cmd, nick, parv[2]); continue; } *server = '\0'; if ((host = (char *)index(nick, '%'))) *host++ = '\0'; /* ** Look for users which match the destination host ** (no host == wildcard) and if one and one only is ** found connected to me, deliver message! */ acptr = find_userhost(nick, host, NULL, &count); if (server) *server = '@'; if (host) *--host = '%'; if (acptr) { if (count == 1) sendto_prefix_one(acptr, sptr, ":%s %s %s :%s", parv[0], cmd, nick, parv[2]); else if (!notice) sendto_one(sptr, replies[ERR_TOOMANYTARGETS], ME, BadTo(parv[0]), "Duplicate", nick, "No Message Delivered"); continue; } } else if ((host = (char *)index(nick, '%'))) { /* ** user%host addressed? */ *host++ = '\0'; acptr = find_userhost(nick, host, NULL, &count); *--host = '%'; if (acptr) { if (count == 1) sendto_prefix_one(acptr, sptr, ":%s %s %s :%s", parv[0], cmd, nick, parv[2]); else if (!notice) sendto_one(sptr, replies[ERR_TOOMANYTARGETS], ME, BadTo(parv[0]), "Duplicate", nick, "No Message Delivered"); continue; } } if (!notice) sendto_one(sptr, replies[ERR_NOSUCHNICK], ME, BadTo(parv[0]), nick); } return penalty; } /* ** m_private ** parv[0] = sender prefix ** parv[1] = receiver list ** parv[2] = message text */ int m_private(aClient *cptr, aClient *sptr, int parc, char *parv[]) { return m_message(cptr, sptr, parc, parv, 0); } /* ** m_notice ** parv[0] = sender prefix ** parv[1] = receiver list ** parv[2] = notice text */ int m_notice(aClient *cptr, aClient *sptr, int parc, char *parv[]) { return m_message(cptr, sptr, parc, parv, 1); } /* ** who_one ** sends one RPL_WHOREPLY to sptr concerning acptr & repchan */ static void who_one(aClient *sptr, aClient *acptr, aChannel *repchan, Link *lp) { char status[5]; int i = 0; if (acptr->user->flags & FLAGS_AWAY) status[i++] = 'G'; else status[i++] = 'H'; if (IsAnOper(acptr)) status[i++] = '*'; if ((repchan != NULL) && (lp == NULL)) lp = find_user_link(repchan->members, acptr); if (lp != NULL) { if (lp->flags & CHFL_CHANOP) status[i++] = '@'; else if (lp->flags & CHFL_VOICE) status[i++] = '+'; } status[i] = '\0'; sendto_one(sptr, replies[RPL_WHOREPLY], ME, BadTo(sptr->name), (repchan) ? (repchan->chname) : "*", acptr->user->username, acptr->user->host, acptr->user->server, acptr->name, status, acptr->hopcount, acptr->user->servp->sid, acptr->info); } /* ** who_channel ** lists all users on a given channel */ static void who_channel(aClient *sptr, aChannel *chptr, int oper) { Reg Link *lp; int member; if (!IsAnonymous(chptr)) { member = IsMember(sptr, chptr); if (member || !SecretChannel(chptr)) { for (lp = chptr->members; lp; lp = lp->next) { if (oper && !IsAnOper(lp->value.cptr)) { continue; } if (IsInvisible(lp->value.cptr) && !member) { continue; } who_one(sptr, lp->value.cptr, chptr, lp); } } } else if ((lp = find_user_link(chptr->members, sptr))) { who_one(sptr, lp->value.cptr, chptr, lp); } } /* ** who_find ** lists all (matching) users. ** CPU intensive, but what can be done? ** ** Reduced CPU load - 05/2001 */ static void who_find(aClient *sptr, char *mask, int oper) { aChannel *chptr = NULL; Link *lp,*lp2; aClient *acptr; /* first, show INvisible matching users on common channels */ if (sptr->user) /* service can request who as well */ for (lp = sptr->user->channel; lp ;lp = lp->next) { chptr = lp->value.chptr; if (IsAnonymous(chptr)) continue; for (lp2 = chptr->members; lp2 ;lp2 = lp2->next) { acptr = lp2->value.cptr; if (!IsInvisible(acptr) || (acptr->flags & FLAGS_HIDDEN)) { continue; } if (oper && !IsAnOper(acptr)) { continue; } /* Mark user with FLAGS_HIDDEN to prevent multiple * checking. */ acptr->flags |= FLAGS_HIDDEN; if (!mask || match(mask, acptr->name) == 0 || match(mask, acptr->user->username) == 0 || match(mask, acptr->user->host) == 0 || match(mask, acptr->user->server) == 0 || match(mask, acptr->info) == 0) who_one(sptr, acptr, chptr, NULL); } } for (acptr = client; acptr; acptr = acptr->next) { if (!IsPerson(acptr)) continue; /* clear the flag */ if (acptr->flags & FLAGS_HIDDEN) { acptr->flags &= ~FLAGS_HIDDEN; continue; } /* allow local opers to see matching clients * on _LOCAL_ server and show the user himself */ if (IsInvisible(acptr) && (acptr != sptr) && !(MyConnect(acptr) && MyConnect(sptr) && IsAnOper(sptr)) ) { continue; } /* we wanted only opers */ if (oper && !IsAnOper(acptr)) { continue; } /* ** This is brute force solution, not efficient...? ;( ** Show entry, if no mask or any of the fields match ** the mask. --msa */ if (!mask || match(mask, acptr->name) == 0 || match(mask, acptr->user->username) == 0 || match(mask, acptr->user->host) == 0 || match(mask, acptr->user->server) == 0 || match(mask, acptr->info) == 0) who_one(sptr, acptr, NULL, NULL); } } /* ** m_who ** parv[0] = sender prefix ** parv[1] = nickname mask list ** parv[2] = additional selection flag, only 'o' for now. */ int m_who(aClient *cptr, aClient *sptr, int parc, char *parv[]) { aChannel *chptr; int oper = parc > 2 ? (*parv[2] == 'o' ): 0; /* Show OPERS only */ int penalty = 0; char *p, *mask, *channame; if (parc < 2) { who_find(sptr, NULL, oper); sendto_one(sptr, replies[RPL_ENDOFWHO], ME, BadTo(parv[0]), "*"); /* it was very CPU intensive */ return MAXPENALTY; } /* get rid of duplicates */ parv[1] = canonize(parv[1]); for (p = NULL, mask = strtoken(&p, parv[1], ","); mask && penalty <= MAXPENALTY; mask = strtoken(&p, NULL, ",")) { channame = NULL; penalty += 1; /* find channel user last joined, we might need it later */ if (sptr->user && sptr->user->channel) channame = sptr->user->channel->value.chptr->chname; #if 0 /* I think it's useless --Beeth */ clean_channelname(mask); #endif /* ** We can never have here !mask ** or *mask == '\0', since it would be equal ** to parc == 1, that is 'WHO' and/or would not ** pass through above for loop. */ if (mask[1] == '\0' && mask[0] == '0') { /* ** 'WHO 0' - do who_find() later */ mask = NULL; channame = NULL; } else if (mask[1] == '\0' && mask[0] == '*') { /* ** 'WHO *' ** If user was on any channel, list the one ** he joined last. */ mask = NULL; } else { /* ** Try if mask was channelname and if yes, do ** who_channel, else if mask was nick, do who_one. ** Else do horrible who_find() */ channame = mask; } if (IsChannelName(channame)) { chptr = find_channel(channame, NULL); if (chptr) { who_channel(sptr, chptr, oper); } else { /* ** 'WHO #nonexistant'. */ penalty += 1; } } else { aClient *acptr = NULL; if (mask) { /* ** Here mask can be NULL. It doesn't matter, ** since find_client would return NULL. ** Just saving one function call. ;) */ acptr = find_client(mask, NULL); if (acptr && !IsClient(acptr)) { acptr = NULL; } } if (acptr) { /* We found client, so send WHO for it */ who_one(sptr, acptr, NULL, NULL); } else { /* ** All nice chances lost above. ** We must hog our server with that. */ /* simplify mask */ (void)collapse(mask); who_find(sptr, mask, oper); penalty += MAXPENALTY; } } sendto_one(sptr, replies[RPL_ENDOFWHO], ME, BadTo(parv[0]), BadPtr(mask) ? "*" : mask); } return penalty; } /* send_whois() is used by m_whois() to send whois reply to sptr, for acptr */ static void send_whois(aClient *sptr, aClient *acptr) { static anUser UnknownUser = { NULL, /* channel */ NULL, /* invited */ NULL, /* uwas */ NULL, /* away */ 0, /* last */ 1, /* refcount */ 0, /* joined */ 0, /* flags */ NULL, /* servp */ 0, NULL, NULL, /* hashc, uhnext, bcptr */ "", /* user */ "0", /* uid */ "", /* host */ "", /* server */ }; Link *lp; anUser *user; aChannel *chptr; aClient *a2cptr; int len, mlen; char *name; user = acptr->user ? acptr->user : &UnknownUser; name = (!*acptr->name) ? "?" : acptr->name; a2cptr = find_server(user->server, NULL); sendto_one(sptr, replies[RPL_WHOISUSER], ME, BadTo(sptr->name), name, user->username, user->host, acptr->info); mlen = strlen(ME) + strlen(sptr->name) + 6 + strlen(name); for (len = 0, *buf = '\0', lp = user->channel; lp; lp = lp->next) { chptr = lp->value.chptr; if ((!IsAnonymous(chptr) || acptr == sptr) && ShowChannel(sptr, chptr)) { if (len + strlen(chptr->chname) > (size_t) BUFSIZE - 4 - mlen) { sendto_one(sptr, ":%s %d %s %s :%s", ME, RPL_WHOISCHANNELS, sptr->name, name, buf); *buf = '\0'; len = 0; } if (is_chan_op(acptr, chptr)) *(buf + len++) = '@'; else if (has_voice(acptr, chptr)) *(buf + len++) = '+'; if (len) *(buf + len) = '\0'; (void)strcpy(buf + len, chptr->chname); len += strlen(chptr->chname); (void)strcat(buf + len, " "); len++; } } if (buf[0] != '\0') sendto_one(sptr, replies[RPL_WHOISCHANNELS], ME, BadTo(sptr->name), name, buf); sendto_one(sptr, replies[RPL_WHOISSERVER], ME, BadTo(sptr->name), name, user->server, a2cptr ? a2cptr->info:"*Not On This Net*"); if (user->flags & FLAGS_AWAY) send_away(sptr, user->bcptr); if (IsAnOper(acptr)) sendto_one(sptr, replies[RPL_WHOISOPERATOR], ME, BadTo(sptr->name), name); if (acptr->user && MyConnect(acptr)) sendto_one(sptr, replies[RPL_WHOISIDLE], ME, BadTo(sptr->name), name, timeofday - user->last #ifdef WHOIS_SIGNON_TIME , acptr->firsttime #endif ); } /* ** m_whois ** parv[0] = sender prefix ** parv[1] = nickname masklist */ int m_whois(aClient *cptr, aClient *sptr, int parc, char *parv[]) { Link *lp; aClient *acptr; aChannel *chptr; char *nick, *tmp, *tmp2; char *p = NULL; int found = 0; if (parc < 2) { sendto_one(sptr, replies[ERR_NONICKNAMEGIVEN], ME, BadTo(parv[0])); return 1; } if (parc > 2) { if (hunt_server(cptr,sptr,":%s WHOIS %s :%s", 1,parc,parv) != HUNTED_ISME) return 3; parv[1] = parv[2]; } tmp = mystrdup(parv[1]); for (tmp2 = canonize(tmp); (nick = strtoken(&p, tmp2, ",")); tmp2 = NULL) { int invis, showperson, member, wilds; found &= 0x0f; /* high/boolean, low/counter */ (void)collapse(nick); wilds = (index(nick, '?') || index(nick, '*')); /* * We're no longer allowing remote users to generate * requests with wildcard, nor local users with more * than one wildcard target per command. * Max 3 targets per command allowed. */ if ((wilds && (!MyConnect(sptr) || p)) || found++ > 3) break; if (!wilds) { acptr = hash_find_client(nick, (aClient *)NULL); if (!acptr || !IsPerson(acptr)) sendto_one(sptr, replies[ERR_NOSUCHNICK], ME, BadTo(parv[0]), nick); else send_whois(sptr, acptr); continue; } for (acptr = client; (acptr = next_client(acptr, nick)); acptr = acptr->next) { if (IsServer(acptr) || IsService(acptr)) continue; /* * I'm always last :-) and acptr->next == NULL!! */ if (IsMe(acptr)) break; /* * 'Rules' established for sending a WHOIS reply: * - if wildcards are being used don't send a reply if * the querier isnt any common channels and the * client in question is invisible and wildcards are * in use (allow exact matches only); * - only send replies about common or public channels * the target user(s) are on; */ invis = (acptr->user) ? (acptr->user->flags & FLAGS_INVISIBLE) : 0; member = (acptr->user && acptr->user->channel) ? 1 : 0; showperson = (wilds && !invis && !member) || !wilds; for (lp = (acptr->user) ? acptr->user->channel : NULL; lp; lp = lp->next) { chptr = lp->value.chptr; if (IsAnonymous(chptr)) continue; member = IsMember(sptr, chptr); if (invis && !member) continue; if (member || (!invis && PubChannel(chptr))) { showperson = 1; break; } if (!invis && HiddenChannel(chptr) && !SecretChannel(chptr)) showperson = 1; } if (!showperson) continue; found |= 0x10; send_whois(sptr, acptr); } if (!(found & 0x10)) { if (strlen(nick) > (size_t) NICKLEN) nick[NICKLEN] = '\0'; sendto_one(sptr, replies[ERR_NOSUCHNICK], ME, BadTo(parv[0]), nick); } if (p) p[-1] = ','; } sendto_one(sptr, replies[RPL_ENDOFWHOIS], ME, BadTo(parv[0]), parv[1]); MyFree(tmp); return 2; } /* ** m_user ** parv[0] = sender prefix ** parv[1] = username (login name, account) ** parv[2] = user modes ** parv[3] = unused ** parv[4] = real name info ** ** NOTE: As of 2.11.1 we no longer call m_user() internally. --B. */ int m_user(aClient *cptr, aClient *sptr, int parc, char *parv[]) { #define UFLAGS (FLAGS_INVISIBLE|FLAGS_WALLOP|FLAGS_RESTRICT) struct umodes_arr_s { char umode; int flag; } umodes_arr[] = { {'i', FLAGS_INVISIBLE}, {'r', FLAGS_RESTRICT}, {'w', FLAGS_WALLOP}, {'\0', 0} }; char *username, *umodes, *server, *realname; anUser *user; char ipbuf[BUFSIZE]; int what,i; char *s; if (MyConnect(cptr) && IsUnknown(cptr) && IsConfServeronly(cptr->acpt->confs->value.aconf)) { sendto_flag(SCH_LOCAL, "User connection to server-only P-line " "from %s", get_client_host(cptr)); find_bounce(cptr, -1, -1); return exit_client(cptr, cptr, &me, "Server only port"); } /* Reject new USER */ if (IsServer(sptr) || IsService(sptr) || sptr->user) { sendto_one(sptr, replies[ERR_ALREADYREGISTRED], ME, BadTo(parv[0])); return 1; } if ((username = (char *)index(parv[1],'@'))) *username = '\0'; /* Copy parameters into better documenting variables */ username = parv[1]; umodes = parv[2]; server = parv[3]; realname = parv[4]; #ifdef INET6 inetntop(AF_INET6, (char *)&sptr->ip, ipbuf, sizeof(ipbuf)); #else strcpy(ipbuf, (char *)inetntoa((char *)&sptr->ip)); #endif user = make_user(sptr, strlen(ipbuf)); strcpy(user->sip, ipbuf); user->servp = me.serv; me.serv->refcnt++; #ifdef DEFAULT_INVISIBLE SetInvisible(sptr); #endif /* parse desired user modes sent in USER */ /* rfc behaviour - bits */ if (isdigit(*umodes)) { for (s = umodes+1; *s; s++) if (!isdigit(*s)) break; if (*s == '\0') /* allows only umodes specified in UFLAGS - see above */ sptr->user->flags |= (UFLAGS & atoi(umodes)); } else /* new behaviour */ { /* 0 here is intentional. User MUST specify + or -, * as we don't want to restrict (broken) clients which send * their hostname in mode field (and happen to have r there). * - jv */ what = 0; for (s = umodes; *s; s++) { switch (*s) { case '+': what = MODE_ADD; continue; case '-': what = MODE_DEL; continue; default: break; } /* If mode does not start with - or +, don't bother. */ if (what == 0) break; for (i = 0; umodes_arr[i].umode != '\0'; i++) { if (*s == umodes_arr[i].umode) { if (what == MODE_ADD) { sptr->user->flags |= umodes_arr[i].flag; } if (what == MODE_DEL) { sptr->user->flags &= ~(umodes_arr[i].flag); } } } } } user->server = find_server_string(me.serv->snum); reorder_client_in_list(sptr); if (sptr->info != DefInfo) MyFree(sptr->info); if (strlen(realname) > REALLEN) realname[REALLEN] = '\0'; sptr->info = mystrdup(realname); #ifdef XLINE sptr->user2 = mystrdup(umodes); sptr->user3 = mystrdup(server); #endif if (sptr->name[0]) /* NICK already received, now we have USER... */ { return register_user(cptr, sptr, sptr->name, username); } else { strncpyzt(sptr->user->username, username, USERLEN+1); } return 2; } /* Fear www proxy abusers... aliased to QUIT, muhaha --B. */ int m_post(aClient *cptr, aClient *sptr, int parc, char *parv[]) { sendto_flag(SCH_LOCAL, "Denied http-post connection from %s.", cptr->sockhost); return m_quit(cptr, sptr, parc, parv); } /* ** m_quit ** parv[0] = sender prefix ** parv[1] = comment */ int m_quit(aClient *cptr, aClient *sptr, int parc, char *parv[]) { static char comment[TOPICLEN+1]; if (IsServer(sptr)) return 0; if (MyConnect(sptr)) { (void) snprintf(comment, TOPICLEN, "\"%s", (parc > 1 && parv[1]) ? parv[1] : ""); (void) strcat(comment, "\""); } else { (void) snprintf(comment, TOPICLEN + 1, "%s", (parc > 1 && parv[1]) ? parv[1] : ""); } return exit_client(cptr, sptr, sptr, comment); } /* ** m_kill ** parv[0] = sender prefix ** parv[1] = kill victim ** parv[2] = kill path */ int m_kill(aClient *cptr, aClient *sptr, int parc, char *parv[]) { aClient *acptr = NULL; char *inpath = cptr->name; char *user, *path, *killer; int chasing = 0; if (!is_allowed(sptr, ACL_KILL)) return m_nopriv(cptr, sptr, parc, parv); user = parv[1]; path = parv[2]; if (IsAnOper(cptr) && strlen(path) > (size_t) TOPICLEN) path[TOPICLEN] = '\0'; /* first, _if coming from a server_ check for kill on UID */ if (IsServer(cptr)) acptr = find_uid(user, NULL); if (acptr == NULL) acptr = find_client(user, NULL); if (acptr == NULL) { /* ** If the user has recently changed nick, we automaticly ** rewrite the KILL for this new nickname--this keeps ** servers in synch when nick change and kill collide */ if (!(acptr = get_history(user, (long)KILLCHASETIMELIMIT))) { if (!IsServer(sptr)) sendto_one(sptr, replies[ERR_NOSUCHNICK], ME, BadTo(parv[0]), user); return 1; } sendto_one(sptr,":%s NOTICE %s :KILL changed from %s to %s", ME, parv[0], user, acptr->name); chasing = 1; } if (!MyConnect(acptr) && !is_allowed(cptr, ACL_KILLREMOTE)) { return m_nopriv(cptr, sptr, parc, parv); } if (IsServer(acptr) || IsMe(acptr)) { sendto_flag(SCH_ERROR, "%s tried to KILL server %s: %s %s %s", sptr->name, acptr->name, parv[0], parv[1], parv[2]); sendto_one(sptr, replies[ERR_CANTKILLSERVER], ME, BadTo(parv[0]), acptr->name); return 1; } if (!IsServer(cptr)) { /* ** The kill originates from this server, initialize path. ** (In which case the 'path' may contain user suplied ** explanation ...or some nasty comment, sigh... >;-) ** ** ...!operhost!oper ** ...!operhost!oper (comment) */ #ifdef UNIXPORT if (IsUnixSocket(cptr)) /* Don't use get_client_name syntax */ inpath = ME; else #endif inpath = cptr->sockhost; sprintf(buf, "%s%s (%s)", cptr->name, IsOper(sptr) ? "" : "(L)", path); path = buf; } /* ** Notify all *local* opers about the KILL (this includes the one ** originating the kill, if from this server--the special numeric ** reply message is not generated anymore). ** ** Note: "acptr->name" is used instead of "user" because we may ** have changed the target because of the nickname change. */ if (IsService(acptr)) { sendto_flag(SCH_KILL, "Received KILL message for %s[%s]. " "From %s Path: %s!%s", acptr->name, isdigit(acptr->service->servp->sid[0]) ? acptr->service->servp->sid : "2.10", parv[0], inpath, path); } else { sendto_flag(SCH_KILL, "Received KILL message for " "%s!%s@%s[%s/%s]. From %s Path: %s!%s", acptr->name, acptr->user->username, acptr->user->host, acptr->user->servp->bcptr->name, isdigit(acptr->user->servp->sid[0]) ? acptr->user->servp->sid : "2.10", parv[0], inpath, path); } #if defined(USE_SYSLOG) && defined(SYSLOG_KILL) if (IsOper(sptr)) { if (IsService(acptr)) { syslog(LOG_DEBUG, "KILL From %s For %s[%s] Path %s!%s", parv[0], acptr->name, isdigit(acptr->service->servp->sid[0]) ? acptr->service->servp->sid : "2.10", inpath, path); } else { syslog(LOG_DEBUG, "KILL From %s For %s!%s@%s[%s/%s] " "Path %s!%s", parv[0], acptr->name, acptr->user->username, acptr->user->host, acptr->user->servp->bcptr->name, isdigit(acptr->user->servp->sid[0]) ? acptr->user->servp->sid : "2.10", inpath, path); } } #endif /* ** And pass on the message to other servers. Note, that if KILL ** was changed, the message has to be sent to all links, also ** back. ** Suicide kills are NOT passed on --SRB */ if (!MyConnect(acptr) || !MyConnect(sptr) || !IsAnOper(sptr)) { if (acptr->user) { sendto_serv_v(cptr, SV_UID, ":%s KILL %s :%s!%s", parv[0], acptr->user->uid, inpath, path); } else sendto_serv_butone(cptr, ":%s KILL %s :%s!%s", parv[0], acptr->name, inpath, path); if (chasing && !IsClient(cptr)) sendto_one(cptr, ":%s KILL %s :%s!%s", ME, acptr->name, inpath, path); acptr->flags |= FLAGS_KILLED; } #ifdef USE_SERVICES check_services_butone(SERVICE_WANT_KILL, NULL, sptr, ":%s KILL %s :%s!%s", parv[0], acptr->name, inpath, path); #endif /* ** Tell the victim she/he has been zapped, but *only* if ** the victim is on current server--no sense in sending the ** notification chasing the above kill, it won't get far ** anyway (as this user don't exist there any more either) */ if (MyConnect(acptr)) sendto_prefix_one(acptr, sptr,":%s KILL %s :%s!%s", parv[0], acptr->name, inpath, path); /* ** Set FLAGS_KILLED. This prevents exit_one_client from sending ** the unnecessary QUIT for this. (This flag should never be ** set in any other place) */ if (MyConnect(acptr) && MyConnect(sptr) && IsAnOper(sptr)) { acptr->exitc = EXITC_KILL; sprintf(buf2, "Local Kill by %s (%s)", sptr->name, parv[2]); } else { if ((killer = index(path, ' '))) { while (killer > path && *killer != '!') killer--; if (killer != path) killer++; } else killer = path; sprintf(buf2, "Killed (%s)", killer); } return exit_client(cptr, acptr, sptr, buf2); } /*********************************************************************** * m_away() - Added 14 Dec 1988 by jto. * Not currently really working, I don't like this * call at all... * * ...trying to make it work. I don't like it either, * but perhaps it's worth the load it causes to net. * This requires flooding of the whole net like NICK, * USER, MODE, etc messages... --msa ***********************************************************************/ /* ** m_away ** parv[0] = sender prefix ** parv[1] = away message */ int m_away(aClient *cptr, aClient *sptr, int parc, char *parv[]) { Reg char *away, *awy2 = parv[1]; int len; away = sptr->user->away; if (parc < 2 || !*awy2) /* Marking as not away */ { if (away) { istat.is_away--; istat.is_awaymem -= (strlen(away) + 1); MyFree(away); sptr->user->away = NULL; } if (sptr->user->flags & FLAGS_AWAY) sendto_serv_butone(cptr, ":%s MODE %s :-a", sptr->user->uid, parv[0]); /* sendto_serv_butone(cptr, ":%s AWAY", parv[0]); */ if (MyConnect(sptr)) sendto_one(sptr, replies[RPL_UNAWAY], ME, BadTo(parv[0])); #ifdef USE_SERVICES check_services_butone(SERVICE_WANT_AWAY, NULL, sptr, ":%s AWAY", parv[0]); #endif sptr->user->flags &= ~FLAGS_AWAY; return 1; } /* Marking as away */ if ((len = strlen(awy2)) > (size_t) TOPICLEN) { len = TOPICLEN; awy2[TOPICLEN] = '\0'; } len++; /* sendto_serv_butone(cptr, ":%s AWAY :%s", parv[0], awy2); */ #ifdef USE_SERVICES check_services_butone(SERVICE_WANT_AWAY, NULL, sptr, ":%s AWAY :%s", parv[0], awy2); #endif if (away) { istat.is_awaymem -= (strlen(away) + 1); away = (char *)MyRealloc(away, len); istat.is_awaymem += len; } else { istat.is_away++; istat.is_awaymem += len; away = (char *)MyMalloc(len); sendto_serv_butone(cptr, ":%s MODE %s :+a", sptr->user->uid, parv[0]); } sptr->user->flags |= FLAGS_AWAY; if (MyConnect(sptr)) { sptr->user->away = away; (void)strcpy(away, awy2); sendto_one(sptr, replies[RPL_NOWAWAY], ME, BadTo(parv[0])); } return 2; } /* ** m_ping ** parv[0] = sender prefix ** parv[1] = origin ** parv[2] = destination */ int m_ping(aClient *cptr, aClient *sptr, int parc, char *parv[]) { aClient *acptr; char *origin, *destination; origin = parv[1]; destination = parv[2]; /* Will get NULL or pointer (parc >= 2!!) */ acptr = find_client(origin, NULL); if (!acptr) acptr = find_server(origin, NULL); if (!acptr || acptr != sptr) origin = cptr->name; if (!BadPtr(destination) && match(destination, ME) != 0) { if ((acptr = find_server(destination, NULL))) sendto_one(acptr, ":%s PING %s :%s", parv[0], origin, destination); else { sendto_one(sptr, replies[ERR_NOSUCHSERVER], ME, BadTo(parv[0]), destination); return 1; } } else sendto_one(sptr, ":%s PONG %s :%s", ME, (destination) ? destination : ME, parv[1]); return 1; } /* ** m_pong ** parv[0] = sender prefix ** parv[1] = origin ** parv[2] = destination */ int m_pong(aClient *cptr, aClient *sptr, int parc, char *parv[]) { aClient *acptr; char *origin, *destination; if (parc < 2 || *parv[1] == '\0') { sendto_one(sptr, replies[ERR_NOORIGIN], ME, BadTo(parv[0])); return 1; } origin = parv[1]; destination = parv[2]; sptr->flags &= ~FLAGS_PINGSENT; if (destination) { acptr = find_target(destination, cptr); } else { acptr = &me; } if (!acptr) { sendto_one(sptr, replies[ERR_NOSUCHSERVER], ME, BadTo(parv[0]), destination); return 2; } if (!IsMe(acptr)) { if (!(MyClient(sptr) && mycmp(origin, sptr->name))) sendto_one(acptr,":%s PONG %s %s", parv[0], origin, destination); return 2; } return 1; } /* ** m_oper ** parv[0] = sender prefix ** parv[1] = oper name ** parv[2] = oper password */ int m_oper(aClient *cptr, aClient *sptr, int parc, char *parv[]) { aConfItem *aconf; char *name, *password, *encr; char *logstring = NULL; name = parv[1]; password = parv[2]; if (IsAnOper(sptr)) { if (MyConnect(sptr)) sendto_one(sptr, replies[RPL_YOUREOPER], ME, BadTo(parv[0])); return 1; } if (!(aconf = find_Oline(name, sptr))) { sendto_one(sptr, replies[ERR_NOOPERHOST], ME, BadTo(parv[0])); return 1; } #ifdef CRYPT_OPER_PASSWORD /* pass whole aconf->passwd as salt, let crypt() deal with it */ if (password && aconf->passwd) { extern char *crypt(); encr = crypt(password, aconf->passwd); if (encr == NULL) { sendto_flag(SCH_ERROR, "crypt() returned NULL"); sendto_one(sptr,replies[ERR_PASSWDMISMATCH], ME,BadTo(parv[0])); return 3; } } else encr = ""; #else encr = password; #endif /* CRYPT_OPER_PASSWORD */ if ((aconf->status & CONF_OPS) && StrEq(encr, aconf->passwd) && !attach_conf(sptr, aconf)) { int old = (sptr->user->flags & ALL_UMODES); char *s; s = index(aconf->host, '@'); *s++ = '\0'; #ifndef NO_OPER_REMOTE if (aconf->flags & ACL_LOCOP) #else if ((match(s,me.sockhost) && !IsLocal(sptr)) || aconf->flags & ACL_LOCOP) #endif SetLocOp(sptr); else SetOper(sptr); *--s = '@'; sendto_flag(SCH_NOTICE, "%s (%s@%s) is now operator (%c)", parv[0], sptr->user->username, sptr->user->host, IsOper(sptr) ? 'o' : 'O'); send_umode_out(cptr, sptr, old); sendto_one(sptr, replies[RPL_YOUREOPER], ME, BadTo(parv[0])); #ifdef USE_SERVICES check_services_butone(SERVICE_WANT_OPER, sptr->user->servp, sptr, ":%s MODE %s :+%c", parv[0], parv[0], IsOper(sptr) ? 'o' : 'O'); #endif if (IsAnOper(sptr)) { istat.is_oper++; sptr->user->servp->usercnt[2]++; } logstring = ""; } else /* Wrong password or attach_conf() failed */ { (void)detach_conf(sptr, aconf); if (!StrEq(encr, aconf->passwd)) sendto_one(sptr,replies[ERR_PASSWDMISMATCH], ME, BadTo(parv[0])); else sendto_one(sptr,":%s %d %s :Too many connections", ME, ERR_PASSWDMISMATCH, BadTo(parv[0])); #ifdef FAILED_OPERLOG sendto_flag(SCH_NOTICE, "FAILED OPER attempt by %s!%s@%s", parv[0], sptr->user->username, sptr->user->host); logstring = "FAILED "; #endif } if (logstring) { #if defined(USE_SYSLOG) && defined(SYSLOG_OPER) syslog(LOG_INFO, "%sOPER (%s) by (%s!%s@%s) [%s@%s]", logstring, name, parv[0], sptr->user->username, sptr->user->host, sptr->auth, #ifdef UNIXPORT IsUnixSocket(sptr) ? sptr->sockhost : #endif #ifdef INET6 inet_ntop(AF_INET6, (char *)&sptr->ip, ipv6string, sizeof(ipv6string)) #else inetntoa((char *)&sptr->ip) #endif ); #endif /* defined(USE_SYSLOG) && defined(SYSLOG_OPER) */ #ifdef FNAME_OPERLOG { int logfile; /* * This conditional makes the logfile active only after * it's been created - thus logging can be turned off by * removing the file. * * stop NFS hangs...most systems should be able to open a * file in 3 seconds. -avalon (curtesy of wumpus) */ (void)alarm(3); if (IsPerson(sptr) && (logfile = open(FNAME_OPERLOG, O_WRONLY|O_APPEND #ifdef LOGFILES_ALWAYS_CREATE |O_CREAT, S_IRUSR|S_IWUSR #endif )) != -1) { (void)alarm(0); sprintf(buf, "%s %sOPER (%s) by (%s!%s@%s)" " [%s@%s]\n", myctime(timeofday), logstring, name, parv[0], sptr->user->username, sptr->user->host, sptr->auth, #ifdef UNIXPORT IsUnixSocket(sptr) ? sptr->sockhost : #endif #ifdef INET6 inetntop(AF_INET6, (char *)&sptr->ip, ipv6string, sizeof(ipv6string)) #else inetntoa((char *)&sptr->ip) #endif ); (void)alarm(3); (void)write(logfile, buf, strlen(buf)); (void)alarm(0); (void)close(logfile); } (void)alarm(0); /* Modification by pjg */ } #endif /* FNAME_OPERLOG */ } /* logstring != NULL */ return 3; } /*************************************************************************** * m_pass() - Added Sat, 4 March 1989 ***************************************************************************/ /* ** m_pass ** parv[0] = sender prefix ** parv[1] = password ** parv[2] = protocol & server versions (server only) ** parv[3] = server id & options (server only) ** parv[4] = (optional) link options (server only) */ int m_pass(aClient *cptr, aClient *sptr, int parc, char *parv[]) { char *password = parv[1]; strncpyzt(cptr->passwd, password, sizeof(cptr->passwd)); if (cptr->user || cptr->service) { /* If we have one of these structures allocated, it means ** that PASS was issued after USER or SERVICE. No need to ** copy PASS parameters to info field, then. */ return 1; } /* Temporarily store PASS pwd *parameters* into info field. ** This will be used as version in m_server() and cleared ** in m_user(). */ if (parc > 2 && parv[2]) { strncpyzt(buf, parv[2], 15); if (parc > 3 && parv[3]) { strcat(buf, " "); strncat(buf, parv[3], 100); if (parc > 4 && parv[4]) { strcat(buf, " "); strncat(buf, parv[4], 5); } } if (cptr->info != DefInfo) MyFree(cptr->info); cptr->info = mystrdup(buf); } return 1; } /* * m_userhost added by Darren Reed 13/8/91 to aid clients and reduce * the need for complicated requests like WHOIS. It returns user/host * information only (no spurious AWAY labels or channels). */ int m_userhost(aClient *cptr, aClient *sptr, int parc, char *parv[]) { char *p = NULL; aClient *acptr; Reg char *s; Reg int i, len; int idx = 1; (void)sprintf(buf, replies[RPL_USERHOST], ME, BadTo(parv[0])); len = strlen(buf); *buf2 = '\0'; for (i = 5, s = strtoken(&p, parv[idx], " "); i && s; i--) { if ((acptr = find_person(s, NULL))) { if (*buf2) (void)strcat(buf, " "); sprintf(buf2, "%s%s=%c%s@%s", acptr->name, IsAnOper(acptr) ? "*" : "", (acptr->user->flags & FLAGS_AWAY) ? '-' : '+', acptr->user->username, acptr->user->host); (void)strncat(buf, buf2, sizeof(buf) - len); len += strlen(buf2); if (len > BUFSIZE - (NICKLEN + 5 + HOSTLEN + USERLEN)) { sendto_one(sptr, "%s", buf); (void)sprintf(buf, replies[RPL_USERHOST], ME, BadTo(parv[0])); len = strlen(buf); *buf2 = '\0'; } } s = strtoken(&p, (char *)NULL, " "); if (!s && parv[++idx]) { p = NULL; s = strtoken(&p, parv[idx], " "); } } sendto_one(sptr, "%s", buf); return 1; } /* * m_ison added by Darren Reed 13/8/91 to act as an efficent user indicator * with respect to cpu/bandwidth used. Implemented for NOTIFY feature in * clients. Designed to reduce number of whois requests. Can process * nicknames in batches as long as the maximum buffer length. * * format: * ISON :nicklist */ int m_ison(aClient *cptr, aClient *sptr, int parc, char *parv[]) { Reg aClient *acptr; Reg char *s, **pav = parv; Reg int len = 0, i; char *p = NULL; (void)sprintf(buf, replies[RPL_ISON], ME, BadTo(*parv)); len = strlen(buf); for (s = strtoken(&p, *++pav, " "); s; s = strtoken(&p, NULL, " ")) if ((acptr = find_person(s, NULL))) { i = strlen(acptr->name); if (len + i > sizeof(buf) - 4) { /* leave room for " \r\n\0" */ break; } (void) strcpy(buf + len, acptr->name); len += i; (void) strcpy(buf + len++, " "); } sendto_one(sptr, "%s", buf); return 1; } /* * m_umode() added 15/10/91 By Darren Reed. * parv[0] - sender (can be NULL, see below..) * parv[1] - username to change mode for * parv[2] - modes to change */ int m_umode(aClient *cptr, aClient *sptr, int parc, char *parv[]) { Reg int flag; Reg int *s; Reg char **p, *m; aClient *acptr = NULL; int what, setflags, penalty = 0; what = MODE_ADD; if (cptr && !(acptr = find_person(parv[1], NULL))) { if (MyConnect(sptr)) sendto_one(sptr, replies[ERR_NOSUCHCHANNEL], ME, BadTo(parv[0]), parv[1]); return 1; } if (cptr == NULL) /* internal call which has to be handled in a special way */ acptr = sptr; if ((cptr != NULL) && ((IsServer(sptr) || sptr != acptr || acptr->from != sptr->from))) { if (IsServer(cptr)) sendto_ops_butone(NULL, ME, "MODE for User %s From %s!%s", parv[1], get_client_name(cptr, FALSE), sptr->name); else sendto_one(sptr, replies[ERR_USERSDONTMATCH], ME, BadTo(parv[0])); return 1; } if (parc < 3) { m = buf; *m++ = '+'; for (s = user_modes; (flag = *s) && (m - buf < BUFSIZE - 4); s += 2) if (sptr->user->flags & flag) *m++ = (char)(*(s+1)); *m = '\0'; sendto_one(sptr, replies[RPL_UMODEIS], ME, BadTo(parv[0]), buf); return 1; } /* find flags already set for user */ setflags = 0; for (s = user_modes; (flag = *s); s += 2) if (sptr->user->flags & flag) setflags |= flag; /* * parse mode change string(s) */ for (p = &parv[2]; p && *p; p++ ) for (m = *p; *m; m++) switch(*m) { case '+' : what = MODE_ADD; break; case '-' : what = MODE_DEL; break; /* we may not get these, * but they shouldnt be in default */ case ' ' : case '\n' : case '\r' : case '\t' : break; case 'a' : /* fall through case */ /* users should use the AWAY message */ if (cptr && !IsServer(cptr)) break; if (what == MODE_DEL && sptr->user->away) { istat.is_away--; istat.is_awaymem -= (strlen(sptr->user->away) + 1); MyFree(sptr->user->away); sptr->user->away = NULL; #ifdef USE_SERVICES check_services_butone(SERVICE_WANT_AWAY, sptr->user->servp, sptr, ":%s AWAY", parv[0]); #endif } #ifdef USE_SERVICES if (what == MODE_ADD) check_services_butone(SERVICE_WANT_AWAY, sptr->user->servp, sptr, ":%s AWAY :", parv[0]); #endif default : for (s = user_modes; (flag = *s); s += 2) if (*m == (char)(*(s+1))) { if (what == MODE_ADD) sptr->user->flags |= flag; else sptr->user->flags &= ~flag; penalty += 1; break; } if (flag == 0 && MyConnect(sptr)) sendto_one(sptr, replies[ERR_UMODEUNKNOWNFLAG], ME, BadTo(parv[0]), *m); break; } if (cptr) { /* stop users making themselves operators too easily */ if (!(setflags & FLAGS_OPER) && IsOper(sptr) && !IsServer(cptr)) ClearOper(sptr); if (!(setflags & FLAGS_LOCOP) && IsLocOp(sptr)) ClearLocOp(sptr); /* but once they are, set their status */ SetClient(sptr); if ((setflags & FLAGS_RESTRICT) && !IsRestricted(sptr)) { sendto_one(sptr, replies[ERR_RESTRICTED], ME, BadTo(parv[0])); SetRestricted(sptr); /* Can't return; here since it could mess counters */ } if ((setflags & (FLAGS_OPER|FLAGS_LOCOP)) && !IsAnOper(sptr) && MyConnect(sptr)) det_confs_butmask(sptr, CONF_CLIENT); /* * compare new flags with old flags and send string which * will cause servers to update correctly. */ if (!IsInvisible(sptr) && (setflags & FLAGS_INVISIBLE)) { istat.is_user[1]--; istat.is_user[0]++; sptr->user->servp->usercnt[1]--; sptr->user->servp->usercnt[0]++; } if (IsInvisible(sptr) && !(setflags & FLAGS_INVISIBLE)) { istat.is_user[1]++; istat.is_user[0]--; sptr->user->servp->usercnt[1]++; sptr->user->servp->usercnt[0]--; } send_umode_out(cptr, sptr, setflags); } /* update counters */ if (IsOper(sptr) && !(setflags & FLAGS_OPER)) { istat.is_oper++; sptr->user->servp->usercnt[2]++; #ifdef USE_SERVICES check_services_butone(SERVICE_WANT_OPER, sptr->user->servp, sptr, ":%s MODE %s :+o", parv[0], parv[0]); #endif } else if (!IsOper(sptr) && (setflags & FLAGS_OPER)) { istat.is_oper--; sptr->user->servp->usercnt[2]--; #ifdef USE_SERVICES check_services_butone(SERVICE_WANT_OPER, sptr->user->servp, sptr, ":%s MODE %s :-o", parv[0], parv[0]); #endif } else if (MyConnect(sptr) && !IsLocOp(sptr) && (setflags & FLAGS_LOCOP)) { istat.is_oper--; sptr->user->servp->usercnt[2]--; #ifdef USE_SERVICES check_services_butone(SERVICE_WANT_OPER, sptr->user->servp, sptr, ":%s MODE %s :-O", parv[0], parv[0]); #endif } return penalty; } /* * send the MODE string for user (user) to connection cptr * -avalon */ void send_umode(aClient *cptr, aClient *sptr, int old, int sendmask, char *umode_buf) { Reg int *s, flag; Reg char *m; int what = MODE_NULL; if (!sptr->user) return; /* * build a string in umode_buf to represent the change in the user's * mode between the new (sptr->flag) and 'old'. */ m = umode_buf; *m = '\0'; for (s = user_modes; (flag = *s); s += 2) { if (MyClient(sptr) && !(flag & sendmask)) continue; if ((flag & old) && !(sptr->user->flags & flag)) { if (what == MODE_DEL) *m++ = *(s+1); else { what = MODE_DEL; *m++ = '-'; *m++ = *(s+1); } } else if (!(flag & old) && (sptr->user->flags & flag)) { if (what == MODE_ADD) *m++ = *(s+1); else { what = MODE_ADD; *m++ = '+'; *m++ = *(s+1); } } } *m = '\0'; if (*umode_buf && cptr) sendto_one(cptr, ":%s MODE %s :%s", sptr->name, sptr->name, umode_buf); } /* * added Sat Jul 25 07:30:42 EST 1992 */ void send_umode_out(aClient *cptr, aClient *sptr, int old) { Reg int i; Reg aClient *acptr; send_umode(NULL, sptr, old, SEND_UMODES, buf); if (*buf) for (i = fdas.highest; i >= 0; i--) { if (!(acptr = local[fdas.fd[i]]) || !IsServer(acptr)) continue; if (acptr == cptr || acptr == sptr) continue; sendto_one(acptr, ":%s MODE %s :%s", sptr->user->uid, sptr->name, buf); } if (cptr && MyClient(cptr)) send_umode(cptr, sptr, old, ALL_UMODES, buf); #ifdef USE_SERVICES /* buf contains all modes for local users, and iow only for remotes */ if (*buf) check_services_butone(SERVICE_WANT_UMODE, sptr->user->servp, sptr, ":%s MODE %s :%s", sptr->name, sptr->name, buf); #endif } /* ** save_user() added 990618 by Christope Kalt ** ** This will save the user sptr, and put the nick he's currently using in ** nick delay. ** It will send SAVE to the servers that can deal with it, and just a nick ** change to the rest. ** It will adjust the path, to include the link we got the SAVE message from. ** For internal calls, set cptr to NULL. */ static void save_user(aClient *cptr, aClient *sptr, char *path) { if (MyConnect(sptr)) { sendto_one(sptr, replies[RPL_SAVENICK], cptr ? cptr->name : ME, sptr->name, sptr->user->uid); #if defined(CLIENTS_CHANNEL) && (CLIENTS_CHANNEL_LEVEL & CCL_NICK) sendto_flag(SCH_CLIENT, "%s %s %s %s NICK %s", sptr->user->uid, sptr->name, sptr->user->username, sptr->user->host, sptr->user->uid); #endif } sendto_common_channels(sptr, ":%s NICK :%s", sptr->name, sptr->user->uid); add_history(sptr, NULL); #ifdef USE_SERVICES check_services_butone(SERVICE_WANT_NICK, sptr->user->servp, sptr, ":%s NICK :%s", sptr->name, sptr->user->uid); #endif sendto_serv_v(cptr, SV_UID, ":%s SAVE %s :%s%c%s", cptr ? cptr->serv->sid : me.serv->sid, sptr->user->uid, cptr ? cptr->name : ME, cptr ? '!' : ' ', path); sendto_flag(SCH_SAVE, "Received SAVE message for %s. Path: %s!%s", sptr->name, cptr ? cptr->name : ME, path); del_from_client_hash_table(sptr->name, sptr); strcpy(sptr->name, sptr->user->uid); add_to_client_hash_table(sptr->name, sptr); } /* ** m_save() added 990618 by Christope Kalt ** parv[0] = sender prefix ** parv[1] = saved user ** parv[2] = save path */ int m_save(aClient *cptr, aClient *sptr, int parc, char *parv[]) { aClient *acptr; char *path = (parc > 2) ? parv[2] : "*no-path*"; if (parc < 2) { sendto_flag(SCH_ERROR, "Save with not enough parameters " "from %s", cptr->name); return 1; } /* need sanity checks here -syrk */ acptr = find_uid(parv[1], NULL); if (acptr && strcasecmp(acptr->name, acptr->user->uid)) { save_user(cptr, acptr, path); ircstp->is_save++; } return 0; } /* ** Given client cptr and function decide access. ** Return 1 for OK, 0 for forbidden. */ int is_allowed(aClient *cptr, long function) { Link *tmp; /* We cannot judge not our clients. Yet. */ if (!MyConnect(cptr) || IsServer(cptr)) return 1; /* minimal control, but nothing else service can do anyway. */ if (IsService(cptr)) { if (function == ACL_TKLINE && (cptr->service->wants & SERVICE_WANT_TKLINE)) return 1; if (function == ACL_KLINE && (cptr->service->wants & SERVICE_WANT_KLINE)) return 1; return 0; } for (tmp = cptr->confs; tmp; tmp = tmp->next) { if (tmp->value.aconf->status & CONF_OPERATOR) break; } /* no O: conf found */ if (!tmp) return 0; /* check access */ if ((tmp->value.aconf->flags & function)) return 1; return 0; } void send_away(aClient *sptr, aClient *acptr) { if (acptr->user->away) { sendto_one(sptr, replies[RPL_AWAY], ME, sptr->name, acptr->name, acptr->user->away); } else { #ifdef AWAY_MOREINFO /* Building buffer and using it instead of "Gone" would be * a better code, but a bit slower; just rememeber about this * one when ever changing RPL_AWAY --B. */ sendto_one(sptr, ":%s 301 %s %s :" "Gone, for more info use WHOIS %s %s", ME, sptr->name, acptr->name, acptr->name, acptr->name); #else sendto_one(sptr, replies[RPL_AWAY], ME, sptr->name, acptr->name, "Gone"); #endif } }