2 * IRC - Internet Relay Chat, ircd/s_user.c (formerly ircd/s_msg.c)
3 * Copyright (C) 1990 Jarkko Oikarinen and
4 * University of Oulu, Computing Center
6 * See file AUTHORS in IRC package for additional names of
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 1, or (at your option)
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
34 #include "ircd_alloc.h"
35 #include "ircd_chattr.h"
36 #include "ircd_features.h"
38 #include "ircd_policy.h"
39 #include "ircd_reply.h"
40 #include "ircd_snprintf.h"
41 #include "ircd_string.h"
50 #include "querycmds.h"
56 #include "s_serv.h" /* max_client_count */
60 #include "supported.h"
66 #include "handlers.h" /* m_motd and m_lusers */
76 static int userCount = 0;
79 * 'make_user' add's an User information block to a client
80 * if it was not previously allocated.
82 struct User *make_user(struct Client *cptr)
86 if (!cli_user(cptr)) {
87 cli_user(cptr) = (struct User*) MyMalloc(sizeof(struct User));
88 assert(0 != cli_user(cptr));
90 /* All variables are 0 by default */
91 memset(cli_user(cptr), 0, sizeof(struct User));
95 cli_user(cptr)->refcnt = 1;
97 return cli_user(cptr);
103 * Decrease user reference count by one and release block, if count reaches 0.
105 void free_user(struct User* user)
108 assert(0 < user->refcnt);
110 if (--user->refcnt == 0) {
116 assert(0 == user->joined);
117 assert(0 == user->invited);
118 assert(0 == user->channel);
127 void user_count_memory(size_t* count_out, size_t* bytes_out)
129 assert(0 != count_out);
130 assert(0 != bytes_out);
131 *count_out = userCount;
132 *bytes_out = userCount * sizeof(struct User);
139 * Local function to find the next matching client. The search
140 * can be continued from the specified client entry. Normal
143 * for (x = client; x = next_client(x,mask); x = x->next)
144 * HandleMatchingClient;
147 struct Client *next_client(struct Client *next, const char* ch)
149 struct Client *tmp = next;
154 next = FindClient(ch);
155 next = next ? next : tmp;
156 if (cli_prev(tmp) == next)
160 for (; next; next = cli_next(next))
161 if (!match(ch, cli_name(next)))
169 * Do the basic thing in delivering the message (command)
170 * across the relays to the specific server (server) for
173 * Note: The command is a format string and *MUST* be
174 * of prefixed style (e.g. ":%s COMMAND %s ...").
175 * Command can have only max 8 parameters.
177 * server parv[server] is the parameter identifying the
178 * target server. It can be a nickname, servername,
179 * or server mask (from a local user) or a server
180 * numeric (from a remote server).
183 * parv[server] is replaced with the pointer to the
184 * real servername from the matched client (I'm lazy
187 * returns: (see #defines)
189 int hunt_server_cmd(struct Client *from, const char *cmd, const char *tok,
190 struct Client *one, int MustBeOper, const char *pattern,
191 int server, int parc, char *parv[])
193 struct Client *acptr;
196 /* Assume it's me, if no server or an unregistered client */
197 if (parc <= server || EmptyString((to = parv[server])) || IsUnknown(from))
198 return (HUNTED_ISME);
200 if (MustBeOper && !IsPrivileged(from))
202 send_reply(from, ERR_NOPRIVILEGES);
203 return HUNTED_NOSUCH;
206 /* Make sure it's a server */
208 /* Make sure it's a server */
209 if (!strchr(to, '*')) {
210 if (0 == (acptr = FindClient(to))) {
211 send_reply(from, ERR_NOSUCHSERVER, to);
212 return HUNTED_NOSUCH;
216 acptr = cli_user(acptr)->server;
217 } else if (!(acptr = find_match_server(to))) {
218 send_reply(from, ERR_NOSUCHSERVER, to);
219 return (HUNTED_NOSUCH);
221 } else if (!(acptr = FindNServer(to)))
222 return (HUNTED_NOSUCH); /* Server broke off in the meantime */
225 return (HUNTED_ISME);
227 if (MustBeOper && !IsPrivileged(from)) {
228 send_reply(from, ERR_NOPRIVILEGES);
229 return HUNTED_NOSUCH;
232 assert(!IsServer(from));
234 parv[server] = (char *) acptr; /* HACK! HACK! HACK! ARGH! */
236 sendcmdto_one(from, cmd, tok, acptr, pattern, parv[1], parv[2], parv[3],
237 parv[4], parv[5], parv[6], parv[7], parv[8]);
239 return (HUNTED_PASS);
242 int hunt_server_prio_cmd(struct Client *from, const char *cmd, const char *tok,
243 struct Client *one, int MustBeOper,
244 const char *pattern, int server, int parc,
247 struct Client *acptr;
250 /* Assume it's me, if no server or an unregistered client */
251 if (parc <= server || EmptyString((to = parv[server])) || IsUnknown(from))
252 return (HUNTED_ISME);
254 /* Make sure it's a server */
256 /* Make sure it's a server */
257 if (!strchr(to, '*')) {
258 if (0 == (acptr = FindClient(to))) {
259 send_reply(from, ERR_NOSUCHSERVER, to);
260 return HUNTED_NOSUCH;
264 acptr = cli_user(acptr)->server;
265 } else if (!(acptr = find_match_server(to))) {
266 send_reply(from, ERR_NOSUCHSERVER, to);
267 return (HUNTED_NOSUCH);
269 } else if (!(acptr = FindNServer(to)))
270 return (HUNTED_NOSUCH); /* Server broke off in the meantime */
273 return (HUNTED_ISME);
275 if (MustBeOper && !IsPrivileged(from)) {
276 send_reply(from, ERR_NOPRIVILEGES);
277 return HUNTED_NOSUCH;
280 assert(!IsServer(from));
282 parv[server] = (char *) acptr; /* HACK! HACK! HACK! ARGH! */
284 sendcmdto_prio_one(from, cmd, tok, acptr, pattern, parv[1], parv[2], parv[3],
285 parv[4], parv[5], parv[6], parv[7], parv[8]);
287 return (HUNTED_PASS);
291 * 'do_nick_name' ensures that the given parameter (nick) is really a proper
292 * string for a nickname (note, the 'nick' may be modified in the process...)
294 * RETURNS the length of the final NICKNAME (0, if nickname is invalid)
296 * Nickname characters are in range 'A'..'}', '_', '-', '0'..'9'
297 * anything outside the above set will terminate nickname.
298 * In addition, the first character cannot be '-' or a Digit.
301 * The '~'-character should be allowed, but a change should be global,
302 * some confusion would result if only few servers allowed it...
304 int do_nick_name(char* nick)
307 char* end = ch + NICKLEN;
310 if (*ch == '-' || IsDigit(*ch)) /* first character in [0..9-] */
313 for ( ; (ch < end) && *ch; ++ch)
314 if (!IsNickChar(*ch))
325 * Copy `source' to `dest', replacing all occurances of '~' and characters that
326 * are not `isIrcUi' by an underscore.
327 * Copies at most USERLEN - 1 characters or up till the first control character.
328 * If `tilde' is true, then a tilde is prepended to `dest'.
329 * Note that `dest' and `source' can point to the same area or to different
330 * non-overlapping areas.
332 static char *clean_user_id(char *dest, char *source, int tilde)
339 ch = *s++; /* Store first character to copy: */
342 *d++ = '~'; /* If `dest' == `source', then this overwrites `ch' */
345 while (ch && !IsCntrl(ch) && rlen--)
347 char nch = *s++; /* Store next character to copy */
348 *d++ = IsUserChar(ch) ? ch : '_'; /* This possibly overwrites it */
361 * This function is called when both NICK and USER messages
362 * have been accepted for the client, in whatever order. Only
363 * after this the USER message is propagated.
365 * NICK's must be propagated at once when received, although
366 * it would be better to delay them too until full info is
367 * available. Doing it is not so simple though, would have
368 * to implement the following:
370 * 1) user telnets in and gives only "NICK foobar" and waits
371 * 2) another user far away logs in normally with the nick
372 * "foobar" (quite legal, as this server didn't propagate it).
373 * 3) now this server gets nick "foobar" from outside, but
374 * has already the same defined locally. Current server
375 * would just issue "KILL foobar" to clean out dups. But,
376 * this is not fair. It should actually request another
377 * nick from local user or kill him/her...
379 int register_user(struct Client *cptr, struct Client *sptr,
380 const char *nick, char *username)
382 struct ConfItem* aconf;
386 char c = 0; /* not alphanum */
387 char d = 'a'; /* not a digit */
395 short digitgroups = 0;
396 struct User* user = cli_user(sptr);
399 user->last = CurrentTime;
400 parv[0] = cli_name(sptr);
401 parv[1] = parv[2] = NULL;
405 static time_t last_too_many1;
406 static time_t last_too_many2;
408 assert(cptr == sptr);
409 switch (conf_check_client(sptr))
413 case ACR_NO_AUTHORIZATION:
414 sendto_opmask_butone(0, SNO_UNAUTH, "Unauthorized connection from %s.",
415 get_client_name(sptr, HIDE_IP));
416 ++ServerStats->is_ref;
417 return exit_client(cptr, sptr, &me,
418 "No Authorization - use another server");
419 case ACR_TOO_MANY_IN_CLASS:
420 if (CurrentTime - last_too_many1 >= (time_t) 60)
422 last_too_many1 = CurrentTime;
423 sendto_opmask_butone(0, SNO_TOOMANY, "Too many connections in "
424 "class %i for %s.", get_client_class(sptr),
425 get_client_name(sptr, SHOW_IP));
427 ++ServerStats->is_ref;
428 IPcheck_connect_fail(cli_ip(sptr));
429 return exit_client(cptr, sptr, &me,
430 "Sorry, your connection class is full - try "
431 "again later or try another server");
432 case ACR_TOO_MANY_FROM_IP:
433 if (CurrentTime - last_too_many2 >= (time_t) 60)
435 last_too_many2 = CurrentTime;
436 sendto_opmask_butone(0, SNO_TOOMANY, "Too many connections from "
438 get_client_name(sptr, SHOW_IP));
440 ++ServerStats->is_ref;
441 return exit_client(cptr, sptr, &me,
442 "Too many connections from your host");
443 case ACR_ALREADY_AUTHORIZED:
444 /* Can this ever happen? */
446 ++ServerStats->is_ref;
447 IPcheck_connect_fail(cli_ip(sptr));
448 return exit_client(cptr, sptr, &me, "Unknown error -- Try again");
450 ircd_strncpy(user->host, cli_sockhost(sptr), HOSTLEN);
451 ircd_strncpy(user->realhost, cli_sockhost(sptr), HOSTLEN);
452 aconf = cli_confs(sptr)->value.aconf;
454 clean_user_id(user->username,
455 (cli_flags(sptr) & FLAGS_GOTID) ? cli_username(sptr) : username,
456 (cli_flags(sptr) & FLAGS_DOID) && !(cli_flags(sptr) & FLAGS_GOTID));
458 if ((user->username[0] == '\0')
459 || ((user->username[0] == '~') && (user->username[1] == '\000')))
460 return exit_client(cptr, sptr, &me, "USER: Bogus userid.");
462 if (!EmptyString(aconf->passwd)
463 && !(IsDigit(*aconf->passwd) && !aconf->passwd[1])
464 && strcmp(cli_passwd(sptr), aconf->passwd))
466 ServerStats->is_ref++;
467 IPcheck_connect_fail(cli_ip(sptr));
468 send_reply(sptr, ERR_PASSWDMISMATCH);
469 return exit_client(cptr, sptr, &me, "Bad Password");
471 memset(cli_passwd(sptr), 0, sizeof(cli_passwd(sptr)));
473 * following block for the benefit of time-dependent K:-lines
475 if (find_kill(sptr)) {
476 ServerStats->is_ref++;
477 IPcheck_connect_fail(cli_ip(sptr));
478 return exit_client(cptr, sptr, &me, "K-lined");
481 * Check for mixed case usernames, meaning probably hacked. Jon2 3-94
482 * Summary of rules now implemented in this patch: Ensor 11-94
483 * In a mixed-case name, if first char is upper, one more upper may
484 * appear anywhere. (A mixed-case name *must* have an upper first
485 * char, and may have one other upper.)
486 * A third upper may appear if all 3 appear at the beginning of the
487 * name, separated only by "others" (-/_/.).
488 * A single group of digits is allowed anywhere.
489 * Two groups of digits are allowed if at least one of the groups is
490 * at the beginning or the end.
491 * Only one '-', '_', or '.' is allowed (or two, if not consecutive).
492 * But not as the first or last char.
493 * No other special characters are allowed.
494 * Name must contain at least one letter.
496 tmpstr2 = tmpstr = (username[0] == '~' ? &username[1] : username);
497 while (*tmpstr && !badid)
509 if ((leadcaps || pos == 1) && !lower && !digits)
515 if (pos == 1 || !IsDigit(d))
522 else if (c == '-' || c == '_' || c == '.')
527 else if (d == '-' || d == '_' || d == '.' || other > 2)
536 if (lower && upper && (!leadcaps || leadcaps > 3 ||
537 (upper > 2 && upper > leadcaps)))
539 else if (digitgroups == 2 && !(IsDigit(tmpstr2[0]) || IsDigit(c)))
541 else if ((!lower && !upper) || !IsAlnum(c))
544 if (badid && (!(cli_flags(sptr) & FLAGS_GOTID) ||
545 strcmp(cli_username(sptr), username) != 0))
547 ServerStats->is_ref++;
549 send_reply(cptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
550 ":Your username is invalid.");
551 send_reply(cptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
552 ":Connect with your real username, in lowercase.");
553 send_reply(cptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
554 ":If your mail address were foo@bar.com, your username "
556 return exit_client(cptr, sptr, &me, "USER: Bad username");
558 Count_unknownbecomesclient(sptr, UserStats);
561 ircd_strncpy(user->username, username, USERLEN);
562 Count_newremoteclient(UserStats, user->server);
566 if (IsInvisible(sptr))
567 ++UserStats.inv_clients;
571 if (MyConnect(sptr)) {
572 cli_handler(sptr) = CLIENT_HANDLER;
573 release_dns_reply(sptr);
575 send_reply(sptr, RPL_WELCOME, nick);
577 * This is a duplicate of the NOTICE but see below...
579 send_reply(sptr, RPL_YOURHOST, cli_name(&me), version);
580 send_reply(sptr, RPL_CREATED, creation);
581 send_reply(sptr, RPL_MYINFO, cli_name(&me), version);
582 send_supported(sptr);
583 m_lusers(sptr, sptr, 1, parv);
586 /* nextping = CurrentTime; */
587 if (cli_snomask(sptr) & SNO_NOISY)
588 set_snomask(sptr, cli_snomask(sptr) & SNO_NOISY, SNO_ADD);
589 IPcheck_connect_succeeded(sptr);
592 /* if (IsServer(cptr)) */
594 struct Client *acptr;
596 acptr = user->server;
597 if (cli_from(acptr) != cli_from(sptr))
599 sendcmdto_one(&me, CMD_KILL, cptr, "%C :%s (%s != %s[%s])",
600 sptr, cli_name(&me), cli_name(user->server), cli_name(cli_from(acptr)),
601 cli_sockhost(cli_from(acptr)));
602 cli_flags(sptr) |= FLAGS_KILLED;
603 return exit_client(cptr, sptr, &me, "NICK server wrong direction");
606 cli_flags(sptr) |= (cli_flags(acptr) & FLAGS_TS8);
609 * Check to see if this user is being propogated
610 * as part of a net.burst, or is using protocol 9.
611 * FIXME: This can be speeded up - its stupid to check it for
612 * every NICK message in a burst again --Run.
614 for (acptr = user->server; acptr != &me; acptr = cli_serv(acptr)->up) {
615 if (IsBurst(acptr) || Protocol(acptr) < 10)
618 if (!IPcheck_remote_connect(sptr, (acptr != &me))) {
620 * We ran out of bits to count this
622 sendcmdto_one(&me, CMD_KILL, sptr, "%C :%s (Too many connections from your host -- Ghost)",
623 sptr, cli_name(&me));
624 return exit_client(cptr, sptr, &me,"Too many connections from your host -- throttled");
627 tmpstr = umode_str(sptr);
628 sendcmdto_serv_butone(user->server, CMD_NICK, cptr,
629 "%s %d %Tu %s %s %s%s%s%s %s%s :%s",
630 nick, cli_hopcount(sptr) + 1, cli_lastnick(sptr),
631 user->username, user->realhost,
632 *tmpstr ? "+" : "", tmpstr, *tmpstr ? " " : "",
633 inttobase64(ip_base64, ntohl(cli_ip(sptr).s_addr), 6),
634 NumNick(sptr), cli_info(sptr));
636 /* Send umode to client */
639 send_umode(cptr, sptr, 0, ALL_UMODES);
640 if (cli_snomask(sptr) != SNO_DEFAULT && (cli_flags(sptr) & FLAGS_SERVNOTICE))
641 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
648 static const struct UserMode {
653 { FLAGS_LOCOP, 'O' },
654 { FLAGS_INVISIBLE, 'i' },
655 { FLAGS_WALLOP, 'w' },
656 { FLAGS_SERVNOTICE, 's' },
658 { FLAGS_CHSERV, 'k' },
659 { FLAGS_DEBUG, 'g' },
660 { FLAGS_ACCOUNT, 'r' },
661 { FLAGS_HIDDENHOST, 'x' }
664 #define USERMODELIST_SIZE sizeof(userModeList) / sizeof(struct UserMode)
667 * XXX - find a way to get rid of this
669 static char umodeBuf[BUFSIZE];
671 int set_nick_name(struct Client* cptr, struct Client* sptr,
672 const char* nick, int parc, char* parv[])
674 if (IsServer(sptr)) {
676 const char* account = 0;
680 * A server introducing a new client, change source
682 struct Client* new_client = make_client(cptr, STAT_UNKNOWN);
683 assert(0 != new_client);
685 cli_hopcount(new_client) = atoi(parv[2]);
686 cli_lastnick(new_client) = atoi(parv[3]);
687 if (Protocol(cptr) > 9 && parc > 7 && *parv[6] == '+') {
688 for (p = parv[6] + 1; *p; p++) {
689 for (i = 0; i < USERMODELIST_SIZE; ++i) {
690 if (userModeList[i].c == *p) {
691 cli_flags(new_client) |= userModeList[i].flag;
692 if (userModeList[i].flag & FLAGS_ACCOUNT)
699 client_set_privs(new_client, NULL); /* set privs on user */
703 strcpy(cli_name(new_client), nick);
704 cli_user(new_client) = make_user(new_client);
705 cli_user(new_client)->server = sptr;
706 SetRemoteNumNick(new_client, parv[parc - 2]);
708 * IP# of remote client
710 cli_ip(new_client).s_addr = htonl(base64toint(parv[parc - 3]));
712 add_client_to_list(new_client);
713 hAddClient(new_client);
715 cli_serv(sptr)->ghost = 0; /* :server NICK means end of net.burst */
716 ircd_strncpy(cli_username(new_client), parv[4], USERLEN);
717 ircd_strncpy(cli_user(new_client)->host, parv[5], HOSTLEN);
718 ircd_strncpy(cli_user(new_client)->realhost, parv[5], HOSTLEN);
719 ircd_strncpy(cli_info(new_client), parv[parc - 1], REALLEN);
721 ircd_strncpy(cli_user(new_client)->account, account, ACCOUNTLEN);
722 if (HasHiddenHost(new_client))
723 ircd_snprintf(0, cli_user(new_client)->host, HOSTLEN, "%s.%s",
724 account, feature_str(FEAT_HIDDEN_HOST));
726 return register_user(cptr, new_client, cli_name(new_client), parv[4]);
728 else if ((cli_name(sptr))[0]) {
730 * Client changing its nick
732 * If the client belongs to me, then check to see
733 * if client is on any channels where it is currently
734 * banned. If so, do not allow the nick change to occur.
737 const char* channel_name;
738 struct Membership *member;
739 if ((channel_name = find_no_nickchange_channel(sptr))) {
740 return send_reply(cptr, ERR_BANNICKCHANGE, channel_name);
743 * Refuse nick change if the last nick change was less
744 * then 30 seconds ago. This is intended to get rid of
745 * clone bots doing NICK FLOOD. -SeKs
746 * If someone didn't change their nick for more then 60 seconds
747 * however, allow to do two nick changes immediately after another
748 * before limiting the nick flood. -Run
750 if (CurrentTime < cli_nextnick(cptr)) {
751 cli_nextnick(cptr) += 2;
752 send_reply(cptr, ERR_NICKTOOFAST, parv[1],
753 cli_nextnick(cptr) - CurrentTime);
754 /* Send error message */
755 sendcmdto_one(cptr, CMD_NICK, cptr, "%s", cli_name(cptr));
756 /* bounce NICK to user */
757 return 0; /* ignore nick change! */
760 /* Limit total to 1 change per NICK_DELAY seconds: */
761 cli_nextnick(cptr) += NICK_DELAY;
762 /* However allow _maximal_ 1 extra consecutive nick change: */
763 if (cli_nextnick(cptr) < CurrentTime)
764 cli_nextnick(cptr) = CurrentTime;
766 /* Invalidate all bans against the user so we check them again */
767 for (member = (cli_user(cptr))->channel; member;
768 member = member->next_channel)
769 ClearBanValid(member);
772 * Also set 'lastnick' to current time, if changed.
774 if (0 != ircd_strcmp(parv[0], nick))
775 cli_lastnick(sptr) = (sptr == cptr) ? TStime() : atoi(parv[2]);
778 * Client just changing his/her nick. If he/she is
779 * on a channel, send note of change to all clients
780 * on that channel. Propagate notice to other servers.
783 sendcmdto_common_channels_butone(sptr, CMD_NICK, NULL, ":%s", nick);
784 add_history(sptr, 1);
785 sendcmdto_serv_butone(sptr, CMD_NICK, cptr, "%s %Tu", nick,
789 sendcmdto_one(sptr, CMD_NICK, sptr, ":%s", nick);
791 if ((cli_name(sptr))[0])
793 strcpy(cli_name(sptr), nick);
797 /* Local client setting NICK the first time */
799 strcpy(cli_name(sptr), nick);
800 if (!cli_user(sptr)) {
801 cli_user(sptr) = make_user(sptr);
802 cli_user(sptr)->server = &me;
804 SetLocalNumNick(sptr);
808 * If the client hasn't gotten a cookie-ping yet,
809 * choose a cookie and send it. -record!jegelhof@cloud9.net
811 if (!cli_cookie(sptr)) {
813 cli_cookie(sptr) = (ircrandom() & 0x7fffffff);
814 } while (!cli_cookie(sptr));
815 sendrawto_one(cptr, MSG_PING " :%u", cli_cookie(sptr));
817 else if (*(cli_user(sptr))->host && cli_cookie(sptr) == COOKIE_VERIFIED) {
819 * USER and PONG already received, now we have NICK.
820 * register_user may reject the client and call exit_client
821 * for it - must test this and exit m_nick too !
823 cli_lastnick(sptr) = TStime(); /* Always local client */
824 if (register_user(cptr, sptr, nick, cli_user(sptr)->username) == CPTR_KILLED)
831 static unsigned char hash_target(unsigned int target)
833 return (unsigned char) (target >> 16) ^ (target >> 8);
839 * sptr must be a local client!
841 * Cannonifies target for client `sptr'.
843 void add_target(struct Client *sptr, void *target)
845 /* Ok, this shouldn't work esp on alpha
847 unsigned char hash = hash_target((unsigned long) target);
848 unsigned char* targets;
851 assert(cli_local(sptr));
853 targets = cli_targets(sptr);
857 for (i = 0; i < MAXTARGETS; ++i) {
858 if (targets[i] == hash)
864 memmove(&targets[RESERVEDTARGETS + 1],
865 &targets[RESERVEDTARGETS], MAXTARGETS - RESERVEDTARGETS - 1);
866 targets[RESERVEDTARGETS] = hash;
872 * sptr must be a local client !
874 * Returns 'true' (1) when too many targets are addressed.
875 * Returns 'false' (0) when it's ok to send to this target.
877 int check_target_limit(struct Client *sptr, void *target, const char *name,
880 unsigned char hash = hash_target((unsigned long) target);
882 unsigned char* targets;
885 assert(cli_local(sptr));
886 targets = cli_targets(sptr);
889 * Same target as last time?
891 if (targets[0] == hash)
893 for (i = 1; i < MAXTARGETS; ++i) {
894 if (targets[i] == hash) {
895 memmove(&targets[1], &targets[0], i);
904 if (CurrentTime < cli_nexttarget(sptr)) {
905 if (cli_nexttarget(sptr) - CurrentTime < TARGET_DELAY + 8) {
909 cli_nexttarget(sptr) += 2;
910 send_reply(sptr, ERR_TARGETTOOFAST, name,
911 cli_nexttarget(sptr) - CurrentTime);
916 cli_nexttarget(sptr) += TARGET_DELAY;
917 if (cli_nexttarget(sptr) < CurrentTime - (TARGET_DELAY * (MAXTARGETS - 1)))
918 cli_nexttarget(sptr) = CurrentTime - (TARGET_DELAY * (MAXTARGETS - 1));
921 memmove(&targets[1], &targets[0], MAXTARGETS - 1);
927 * whisper - called from m_cnotice and m_cprivmsg.
929 * parv[0] = sender prefix
932 * parv[3] = Private message text
934 * Added 971023 by Run.
935 * Reason: Allows channel operators to sent an arbitrary number of private
936 * messages to users on their channel, avoiding the max.targets limit.
937 * Building this into m_private would use too much cpu because we'd have
938 * to a cross channel lookup for every private message!
939 * Note that we can't allow non-chan ops to use this command, it would be
940 * abused by mass advertisers.
943 int whisper(struct Client* source, const char* nick, const char* channel,
944 const char* text, int is_notice)
947 struct Channel* chptr;
948 struct Membership* membership;
952 assert(0 != channel);
953 assert(MyUser(source));
955 if (!(dest = FindUser(nick))) {
956 return send_reply(source, ERR_NOSUCHNICK, nick);
958 if (!(chptr = FindChannel(channel))) {
959 return send_reply(source, ERR_NOSUCHCHANNEL, channel);
962 * compare both users channel lists, instead of the channels user list
963 * since the link is the same, this should be a little faster for channels
964 * with a lot of users
966 for (membership = cli_user(source)->channel; membership; membership = membership->next_channel) {
967 if (chptr == membership->channel)
970 if (0 == membership) {
971 return send_reply(source, ERR_NOTONCHANNEL, chptr->chname);
973 if (!IsVoicedOrOpped(membership)) {
974 return send_reply(source, ERR_VOICENEEDED, chptr->chname);
977 * lookup channel in destination
979 assert(0 != cli_user(dest));
980 for (membership = cli_user(dest)->channel; membership; membership = membership->next_channel) {
981 if (chptr == membership->channel)
984 if (0 == membership || IsZombie(membership)) {
985 return send_reply(source, ERR_USERNOTINCHANNEL, cli_name(dest), chptr->chname);
987 if (is_silenced(source, dest))
990 if (cli_user(dest)->away)
991 send_reply(source, RPL_AWAY, cli_name(dest), cli_user(dest)->away);
993 sendcmdto_one(source, CMD_NOTICE, dest, "%C :%s", dest, text);
995 sendcmdto_one(source, CMD_PRIVATE, dest, "%C :%s", dest, text);
1001 * added Sat Jul 25 07:30:42 EST 1992
1003 void send_umode_out(struct Client *cptr, struct Client *sptr, int old,
1007 struct Client *acptr;
1009 send_umode(NULL, sptr, old, SEND_UMODES & ~(prop ? 0 : FLAGS_OPER));
1011 for (i = HighestFd; i >= 0; i--) {
1012 if ((acptr = LocalClientArray[i]) && IsServer(acptr) &&
1013 (acptr != cptr) && (acptr != sptr) && *umodeBuf)
1014 sendcmdto_one(sptr, CMD_MODE, acptr, "%s :%s", cli_name(sptr), umodeBuf);
1016 if (cptr && MyUser(cptr))
1017 send_umode(cptr, sptr, old, ALL_UMODES);
1022 * send_user_info - send user info userip/userhost
1023 * NOTE: formatter must put info into buffer and return a pointer to the end of
1024 * the data it put in the buffer.
1026 void send_user_info(struct Client* sptr, char* names, int rpl, InfoFormatter fmt)
1031 int users_found = 0;
1032 struct Client* acptr;
1039 mb = msgq_make(sptr, rpl_str(rpl), cli_name(&me), cli_name(sptr));
1041 for (name = ircd_strtok(&p, names, " "); name; name = ircd_strtok(&p, 0, " ")) {
1042 if ((acptr = FindUser(name))) {
1044 msgq_append(0, mb, " ");
1045 (*fmt)(acptr, sptr, mb);
1047 if (5 == ++arg_count)
1050 send_buffer(sptr, mb, 0);
1057 * If, after setting the flags, the user has both HiddenHost and Account
1058 * set, its hostmask is changed.
1060 #define FLAGS_HOST_HIDDEN (FLAGS_ACCOUNT|FLAGS_HIDDENHOST)
1061 int hide_hostmask(struct Client *cptr, unsigned int flags)
1063 struct Membership *chan;
1066 if (MyConnect(cptr) && !feature_bool(FEAT_HOST_HIDING))
1067 flags &= ~FLAGS_HIDDENHOST;
1069 newflags = cli_flags(cptr) | flags;
1070 if ((newflags & FLAGS_HOST_HIDDEN) != FLAGS_HOST_HIDDEN) {
1071 /* The user doesn't have both flags, don't change the hostmask */
1072 cli_flags(cptr) |= flags;
1076 sendcmdto_common_channels_butone(cptr, CMD_QUIT, cptr, ":Registered");
1077 ircd_snprintf(0, cli_user(cptr)->host, HOSTLEN, "%s.%s",
1078 cli_user(cptr)->account, feature_str(FEAT_HIDDEN_HOST));
1079 cli_flags(cptr) |= flags;
1082 * Go through all channels the client was on, rejoin him
1083 * and set the modes, if any
1085 for (chan = cli_user(cptr)->channel; chan; chan = chan->next_channel) {
1086 sendcmdto_channel_butserv_butone(cptr, CMD_JOIN, chan->channel, cptr,
1087 "%H", chan->channel);
1088 if (IsChanOp(chan) && HasVoice(chan)) {
1089 sendcmdto_channel_butserv_butone(&me, CMD_MODE, chan->channel, cptr,
1090 "%H +ov %C %C", chan->channel, cptr, cptr);
1091 } else if (IsChanOp(chan) || HasVoice(chan)) {
1092 sendcmdto_channel_butserv_butone(&me, CMD_MODE, chan->channel, cptr,
1093 "%H +%c %C", chan->channel, IsChanOp(chan) ? 'o' : 'v', cptr);
1101 * set_user_mode() added 15/10/91 By Darren Reed.
1104 * parv[1] - username to change mode for
1105 * parv[2] - modes to change
1107 int set_user_mode(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
1111 struct Client *acptr;
1115 unsigned int tmpmask = 0;
1116 int snomask_given = 0;
1119 int do_host_hiding = 0;
1124 return need_more_params(sptr, "MODE");
1126 if (!(acptr = FindUser(parv[1])))
1128 if (MyConnect(sptr))
1129 send_reply(sptr, ERR_NOSUCHCHANNEL, parv[1]);
1133 if (IsServer(sptr) || sptr != acptr)
1136 sendwallto_group_butone(&me, WALL_WALLOPS, 0,
1137 "MODE for User %s from %s!%s", parv[1],
1138 cli_name(cptr), cli_name(sptr));
1140 send_reply(sptr, ERR_USERSDONTMATCH);
1148 for (i = 0; i < USERMODELIST_SIZE; ++i) {
1149 if ((userModeList[i].flag & cli_flags(sptr)) &&
1150 !(userModeList[i].flag & FLAGS_ACCOUNT))
1151 *m++ = userModeList[i].c;
1154 send_reply(sptr, RPL_UMODEIS, buf);
1155 if ((cli_flags(sptr) & FLAGS_SERVNOTICE) && MyConnect(sptr)
1156 && cli_snomask(sptr) !=
1157 (unsigned int)(IsOper(sptr) ? SNO_OPERDEFAULT : SNO_DEFAULT))
1158 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
1163 * find flags already set for user
1164 * why not just copy them?
1166 setflags = cli_flags(sptr);
1168 if (MyConnect(sptr))
1169 tmpmask = cli_snomask(sptr);
1172 * parse mode change string(s)
1174 for (p = &parv[2]; *p; p++) { /* p is changed in loop too */
1175 for (m = *p; *m; m++) {
1184 if (*(p + 1) && is_snomask(*(p + 1))) {
1186 tmpmask = umode_make_snomask(tmpmask, *++p, what);
1187 tmpmask &= (IsAnOper(sptr) ? SNO_ALL : SNO_USER);
1190 tmpmask = (what == MODE_ADD) ?
1191 (IsAnOper(sptr) ? SNO_OPERDEFAULT : SNO_DEFAULT) : 0;
1193 SetServNotice(sptr);
1195 ClearServNotice(sptr);
1198 if (what == MODE_ADD)
1204 if (what == MODE_ADD)
1207 cli_flags(sptr) &= ~(FLAGS_OPER | FLAGS_LOCOP);
1208 if (MyConnect(sptr)) {
1209 tmpmask = cli_snomask(sptr) & ~SNO_OPER;
1210 cli_handler(sptr) = CLIENT_HANDLER;
1215 if (what == MODE_ADD)
1218 cli_flags(sptr) &= ~(FLAGS_OPER | FLAGS_LOCOP);
1219 if (MyConnect(sptr)) {
1220 tmpmask = cli_snomask(sptr) & ~SNO_OPER;
1221 cli_handler(sptr) = CLIENT_HANDLER;
1226 if (what == MODE_ADD)
1229 ClearInvisible(sptr);
1232 if (what == MODE_ADD)
1238 if (what == MODE_ADD)
1239 SetChannelService(sptr);
1241 ClearChannelService(sptr);
1244 if (what == MODE_ADD)
1250 if (what == MODE_ADD)
1259 * Evaluate rules for new user mode
1260 * Stop users making themselves operators too easily:
1262 if (!IsServer(cptr)) {
1263 if (!(setflags & FLAGS_OPER) && IsOper(sptr))
1265 if (!(setflags & FLAGS_LOCOP) && IsLocOp(sptr))
1268 * new umode; servers can set it, local users cannot;
1269 * prevents users from /kick'ing or /mode -o'ing
1271 if (!(setflags & FLAGS_CHSERV))
1272 ClearChannelService(sptr);
1274 * only send wallops to opers
1276 if (feature_bool(FEAT_WALLOPS_OPER_ONLY) && !IsAnOper(sptr) &&
1277 !(setflags & FLAGS_WALLOP))
1279 #ifdef SERVNOTICE_OPER_ONLY
1280 if (MyConnect(sptr) && !IsAnOper(sptr) && !(setflags & FLAGS_SERVNOTICE)) {
1281 ClearServNotice(sptr);
1282 set_snomask(sptr, 0, SNO_SET);
1285 #ifdef DEBUG_OPER_ONLY
1286 if (!IsAnOper(sptr) && !(setflags & FLAGS_DEBUG))
1290 if (MyConnect(sptr)) {
1291 if ((setflags & (FLAGS_OPER | FLAGS_LOCOP)) && !IsAnOper(sptr))
1292 det_confs_butmask(sptr, CONF_CLIENT & ~CONF_OPS);
1294 if (SendServNotice(sptr)) {
1295 if (tmpmask != cli_snomask(sptr))
1296 set_snomask(sptr, tmpmask, SNO_SET);
1297 if (cli_snomask(sptr) && snomask_given)
1298 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
1300 set_snomask(sptr, 0, SNO_SET);
1303 * Compare new flags with old flags and send string which
1304 * will cause servers to update correctly.
1306 if (!(setflags & FLAGS_OPER) && IsOper(sptr)) { /* user now oper */
1308 client_set_privs(sptr, NULL);
1310 if (HasPriv(sptr, PRIV_PROPAGATE)) /* remember propagate privilege setting */
1312 if ((setflags & FLAGS_OPER) && !IsOper(sptr)) { /* user no longer oper */
1314 client_set_privs(sptr, NULL); /* will clear propagate privilege */
1316 if ((setflags & FLAGS_INVISIBLE) && !IsInvisible(sptr))
1317 --UserStats.inv_clients;
1318 if (!(setflags & FLAGS_INVISIBLE) && IsInvisible(sptr))
1319 ++UserStats.inv_clients;
1320 if (!(setflags & FLAGS_HIDDENHOST) && do_host_hiding)
1321 hide_hostmask(sptr, FLAGS_HIDDENHOST);
1322 send_umode_out(cptr, sptr, setflags, prop);
1328 * Build umode string for BURST command
1331 char *umode_str(struct Client *cptr)
1333 char* m = umodeBuf; /* Maximum string size: "owidg\0" */
1337 c_flags = cli_flags(cptr) & SEND_UMODES; /* cleaning up the original code */
1338 if (HasPriv(cptr, PRIV_PROPAGATE))
1339 c_flags |= FLAGS_OPER;
1341 c_flags &= ~FLAGS_OPER;
1343 for (i = 0; i < USERMODELIST_SIZE; ++i) {
1344 if ( (c_flags & userModeList[i].flag))
1345 *m++ = userModeList[i].c;
1348 if (IsAccount(cptr)) {
1349 char* t = cli_user(cptr)->account;
1352 while ((*m++ = *t++))
1358 return umodeBuf; /* Note: static buffer, gets
1359 overwritten by send_umode() */
1363 * Send the MODE string for user (user) to connection cptr
1366 void send_umode(struct Client *cptr, struct Client *sptr, int old, int sendmask)
1371 int what = MODE_NULL;
1374 * Build a string in umodeBuf to represent the change in the user's
1375 * mode between the new (sptr->flag) and 'old'.
1379 for (i = 0; i < USERMODELIST_SIZE; ++i) {
1380 flag = userModeList[i].flag;
1381 if (MyUser(sptr) && !(flag & sendmask))
1383 if ( (flag & old) && !(cli_flags(sptr) & flag))
1385 if (what == MODE_DEL)
1386 *m++ = userModeList[i].c;
1391 *m++ = userModeList[i].c;
1394 else if (!(flag & old) && (cli_flags(sptr) & flag))
1396 if (what == MODE_ADD)
1397 *m++ = userModeList[i].c;
1402 *m++ = userModeList[i].c;
1407 if (*umodeBuf && cptr)
1408 sendcmdto_one(sptr, CMD_MODE, cptr, "%s :%s", cli_name(sptr), umodeBuf);
1412 * Check to see if this resembles a sno_mask. It is if 1) there is
1413 * at least one digit and 2) The first digit occurs before the first
1414 * alphabetic character.
1416 int is_snomask(char *word)
1420 for (; *word; word++)
1423 else if (IsAlpha(*word))
1430 * If it begins with a +, count this as an additive mask instead of just
1431 * a replacement. If what == MODE_DEL, "+" has no special effect.
1433 unsigned int umode_make_snomask(unsigned int oldmask, char *arg, int what)
1435 unsigned int sno_what;
1436 unsigned int newmask;
1440 if (what == MODE_ADD)
1445 else if (*arg == '-')
1448 if (what == MODE_ADD)
1454 sno_what = (what == MODE_ADD) ? SNO_SET : SNO_DEL;
1455 /* pity we don't have strtoul everywhere */
1456 newmask = (unsigned int)atoi(arg);
1457 if (sno_what == SNO_DEL)
1458 newmask = oldmask & ~newmask;
1459 else if (sno_what == SNO_ADD)
1464 static void delfrom_list(struct Client *cptr, struct SLink **list)
1467 struct SLink* prv = NULL;
1469 for (tmp = *list; tmp; tmp = tmp->next) {
1470 if (tmp->value.cptr == cptr) {
1472 prv->next = tmp->next;
1483 * This function sets a Client's server notices mask, according to
1484 * the parameter 'what'. This could be even faster, but the code
1485 * gets mighty hard to read :)
1487 void set_snomask(struct Client *cptr, unsigned int newmask, int what)
1489 unsigned int oldmask, diffmask; /* unsigned please */
1493 oldmask = cli_snomask(cptr);
1495 if (what == SNO_ADD)
1497 else if (what == SNO_DEL)
1498 newmask = oldmask & ~newmask;
1499 else if (what != SNO_SET) /* absolute set, no math needed */
1500 sendto_opmask_butone(0, SNO_OLDSNO, "setsnomask called with %d ?!", what);
1502 newmask &= (IsAnOper(cptr) ? SNO_ALL : SNO_USER);
1504 diffmask = oldmask ^ newmask;
1506 for (i = 0; diffmask >> i; i++) {
1507 if (((diffmask >> i) & 1))
1509 if (((newmask >> i) & 1))
1512 tmp->next = opsarray[i];
1513 tmp->value.cptr = cptr;
1517 /* not real portable :( */
1518 delfrom_list(cptr, &opsarray[i]);
1521 cli_snomask(cptr) = newmask;
1525 * is_silenced : Does the actual check wether sptr is allowed
1526 * to send a message to acptr.
1527 * Both must be registered persons.
1528 * If sptr is silenced by acptr, his message should not be propagated,
1529 * but more over, if this is detected on a server not local to sptr
1530 * the SILENCE mask is sent upstream.
1532 int is_silenced(struct Client *sptr, struct Client *acptr)
1536 static char sender[HOSTLEN + NICKLEN + USERLEN + 5];
1537 static char senderip[16 + NICKLEN + USERLEN + 5];
1538 static char senderh[HOSTLEN + ACCOUNTLEN + USERLEN + 6];
1540 if (!cli_user(acptr) || !(lp = cli_user(acptr)->silence) || !(user = cli_user(sptr)))
1542 ircd_snprintf(0, sender, sizeof(sender), "%s!%s@%s", cli_name(sptr),
1543 user->username, user->host);
1544 ircd_snprintf(0, senderip, sizeof(senderip), "%s!%s@%s", cli_name(sptr),
1545 user->username, ircd_ntoa((const char*) &(cli_ip(sptr))));
1546 if (HasHiddenHost(sptr))
1547 ircd_snprintf(0, senderh, sizeof(senderh), "%s!%s@%s", cli_name(sptr),
1548 user->username, user->realhost);
1549 for (; lp; lp = lp->next)
1551 if ((!(lp->flags & CHFL_SILENCE_IPMASK) && (!match(lp->value.cp, sender) ||
1552 (HasHiddenHost(sptr) && !match(lp->value.cp, senderh)))) ||
1553 ((lp->flags & CHFL_SILENCE_IPMASK) && !match(lp->value.cp, senderip)))
1555 if (!MyConnect(sptr))
1557 sendcmdto_one(acptr, CMD_SILENCE, cli_from(sptr), "%C %s", sptr,
1569 * Removes all silence masks from the list of sptr that fall within `mask'
1570 * Returns -1 if none where found, 0 otherwise.
1572 int del_silence(struct Client *sptr, char *mask)
1578 for (lp = &(cli_user(sptr))->silence; *lp;) {
1579 if (!mmatch(mask, (*lp)->value.cp))
1583 MyFree(tmp->value.cp);
1593 int add_silence(struct Client* sptr, const char* mask)
1595 struct SLink *lp, **lpp;
1596 int cnt = 0, len = strlen(mask);
1599 for (lpp = &(cli_user(sptr))->silence, lp = *lpp; lp;)
1601 if (0 == ircd_strcmp(mask, lp->value.cp))
1603 if (!mmatch(mask, lp->value.cp))
1605 struct SLink *tmp = lp;
1606 *lpp = lp = lp->next;
1607 MyFree(tmp->value.cp);
1613 len += strlen(lp->value.cp);
1614 if ((len > (feature_int(FEAT_AVBANLEN) * feature_int(FEAT_MAXSILES))) ||
1615 (++cnt >= feature_int(FEAT_MAXSILES)))
1617 send_reply(sptr, ERR_SILELISTFULL, mask);
1620 else if (!mmatch(lp->value.cp, mask))
1627 memset(lp, 0, sizeof(struct SLink));
1628 lp->next = cli_user(sptr)->silence;
1629 lp->value.cp = (char*) MyMalloc(strlen(mask) + 1);
1630 assert(0 != lp->value.cp);
1631 strcpy(lp->value.cp, mask);
1632 if ((ip_start = strrchr(mask, '@')) && check_if_ipmask(ip_start + 1))
1633 lp->flags = CHFL_SILENCE_IPMASK;
1634 cli_user(sptr)->silence = lp;
1639 send_supported(struct Client *cptr)
1641 char featurebuf[512];
1643 ircd_snprintf(0, featurebuf, sizeof(featurebuf), FEATURES1, FEATURESVALUES1);
1644 send_reply(cptr, RPL_ISUPPORT, featurebuf);
1645 ircd_snprintf(0, featurebuf, sizeof(featurebuf), FEATURES2, FEATURESVALUES2);
1646 send_reply(cptr, RPL_ISUPPORT, featurebuf);
1648 return 0; /* convenience return, if it's ever needed */