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.
33 #include "ircd_alloc.h"
34 #include "ircd_chattr.h"
35 #include "ircd_features.h"
37 #include "ircd_policy.h"
38 #include "ircd_reply.h"
39 #include "ircd_string.h"
48 #include "querycmds.h"
54 #include "s_serv.h" /* max_client_count */
56 #include "sprintf_irc.h"
59 #include "supported.h"
65 #include "handlers.h" /* m_motd and m_lusers */
75 static int userCount = 0;
78 * 'make_user' add's an User information block to a client
79 * if it was not previously allocated.
81 struct User *make_user(struct Client *cptr)
85 if (!cli_user(cptr)) {
86 cli_user(cptr) = (struct User*) MyMalloc(sizeof(struct User));
87 assert(0 != cli_user(cptr));
89 /* All variables are 0 by default */
90 memset(cli_user(cptr), 0, sizeof(struct User));
94 cli_user(cptr)->refcnt = 1;
96 return cli_user(cptr);
102 * Decrease user reference count by one and release block, if count reaches 0.
104 void free_user(struct User* user)
107 assert(0 < user->refcnt);
109 if (--user->refcnt == 0) {
115 assert(0 == user->joined);
116 assert(0 == user->invited);
117 assert(0 == user->channel);
126 void user_count_memory(size_t* count_out, size_t* bytes_out)
128 assert(0 != count_out);
129 assert(0 != bytes_out);
130 *count_out = userCount;
131 *bytes_out = userCount * sizeof(struct User);
138 * Local function to find the next matching client. The search
139 * can be continued from the specified client entry. Normal
142 * for (x = client; x = next_client(x,mask); x = x->next)
143 * HandleMatchingClient;
146 struct Client *next_client(struct Client *next, const char* ch)
148 struct Client *tmp = next;
153 next = FindClient(ch);
154 next = next ? next : tmp;
155 if (cli_prev(tmp) == next)
159 for (; next; next = cli_next(next))
160 if (!match(ch, cli_name(next)))
168 * Do the basic thing in delivering the message (command)
169 * across the relays to the specific server (server) for
172 * Note: The command is a format string and *MUST* be
173 * of prefixed style (e.g. ":%s COMMAND %s ...").
174 * Command can have only max 8 parameters.
176 * server parv[server] is the parameter identifying the
180 * parv[server] is replaced with the pointer to the
181 * real servername from the matched client (I'm lazy
184 * returns: (see #defines)
186 int hunt_server_cmd(struct Client *from, const char *cmd, const char *tok,
187 struct Client *one, int MustBeOper, const char *pattern,
188 int server, int parc, char *parv[])
190 struct Client *acptr;
193 /* Assume it's me, if no server or an unregistered client */
194 if (parc <= server || EmptyString((to = parv[server])) || IsUnknown(from))
195 return (HUNTED_ISME);
197 /* Make sure it's a server */
199 /* Make sure it's a server */
200 if (!strchr(to, '*')) {
201 if (0 == (acptr = FindClient(to)))
202 return HUNTED_NOSUCH;
205 acptr = cli_user(acptr)->server;
206 } else if (!(acptr = find_match_server(to))) {
207 send_reply(from, ERR_NOSUCHSERVER, to);
208 return (HUNTED_NOSUCH);
210 } else if (!(acptr = FindNServer(to)))
211 return (HUNTED_NOSUCH); /* Server broke off in the meantime */
214 return (HUNTED_ISME);
216 if (MustBeOper && !IsPrivileged(from)) {
217 send_reply(from, ERR_NOPRIVILEGES);
218 return HUNTED_NOSUCH;
221 assert(!IsServer(from));
223 parv[server] = (char *) acptr; /* HACK! HACK! HACK! ARGH! */
225 sendcmdto_one(from, cmd, tok, acptr, pattern, parv[1], parv[2], parv[3],
226 parv[4], parv[5], parv[6], parv[7], parv[8]);
228 return (HUNTED_PASS);
232 * 'do_nick_name' ensures that the given parameter (nick) is really a proper
233 * string for a nickname (note, the 'nick' may be modified in the process...)
235 * RETURNS the length of the final NICKNAME (0, if nickname is invalid)
237 * Nickname characters are in range 'A'..'}', '_', '-', '0'..'9'
238 * anything outside the above set will terminate nickname.
239 * In addition, the first character cannot be '-' or a Digit.
242 * The '~'-character should be allowed, but a change should be global,
243 * some confusion would result if only few servers allowed it...
245 int do_nick_name(char* nick)
248 char* end = ch + NICKLEN;
251 if (*ch == '-' || IsDigit(*ch)) /* first character in [0..9-] */
254 for ( ; (ch < end) && *ch; ++ch)
255 if (!IsNickChar(*ch))
266 * Copy `source' to `dest', replacing all occurances of '~' and characters that
267 * are not `isIrcUi' by an underscore.
268 * Copies at most USERLEN - 1 characters or up till the first control character.
269 * If `tilde' is true, then a tilde is prepended to `dest'.
270 * Note that `dest' and `source' can point to the same area or to different
271 * non-overlapping areas.
273 static char *clean_user_id(char *dest, char *source, int tilde)
280 ch = *s++; /* Store first character to copy: */
283 *d++ = '~'; /* If `dest' == `source', then this overwrites `ch' */
286 while (ch && !IsCntrl(ch) && rlen--)
288 char nch = *s++; /* Store next character to copy */
289 *d++ = IsUserChar(ch) ? ch : '_'; /* This possibly overwrites it */
302 * This function is called when both NICK and USER messages
303 * have been accepted for the client, in whatever order. Only
304 * after this the USER message is propagated.
306 * NICK's must be propagated at once when received, although
307 * it would be better to delay them too until full info is
308 * available. Doing it is not so simple though, would have
309 * to implement the following:
311 * 1) user telnets in and gives only "NICK foobar" and waits
312 * 2) another user far away logs in normally with the nick
313 * "foobar" (quite legal, as this server didn't propagate it).
314 * 3) now this server gets nick "foobar" from outside, but
315 * has already the same defined locally. Current server
316 * would just issue "KILL foobar" to clean out dups. But,
317 * this is not fair. It should actually request another
318 * nick from local user or kill him/her...
320 int register_user(struct Client *cptr, struct Client *sptr,
321 const char *nick, char *username, struct Gline *agline)
323 struct ConfItem* aconf;
327 char c = 0; /* not alphanum */
328 char d = 'a'; /* not a digit */
336 short digitgroups = 0;
337 struct User* user = cli_user(sptr);
339 char featurebuf[512];
341 user->last = CurrentTime;
342 parv[0] = cli_name(sptr);
343 parv[1] = parv[2] = NULL;
347 static time_t last_too_many1;
348 static time_t last_too_many2;
350 assert(cptr == sptr);
351 switch (conf_check_client(sptr))
355 case ACR_NO_AUTHORIZATION:
356 sendto_opmask_butone(0, SNO_UNAUTH, "Unauthorized connection from %s.",
357 get_client_name(sptr, HIDE_IP));
358 ++ServerStats->is_ref;
359 return exit_client(cptr, sptr, &me,
360 "No Authorization - use another server");
361 case ACR_TOO_MANY_IN_CLASS:
362 if (CurrentTime - last_too_many1 >= (time_t) 60)
364 last_too_many1 = CurrentTime;
365 sendto_opmask_butone(0, SNO_TOOMANY, "Too many connections in "
366 "class %i for %s.", get_client_class(sptr),
367 get_client_name(sptr, SHOW_IP));
369 ++ServerStats->is_ref;
370 IPcheck_connect_fail(cli_ip(sptr));
371 return exit_client(cptr, sptr, &me,
372 "Sorry, your connection class is full - try "
373 "again later or try another server");
374 case ACR_TOO_MANY_FROM_IP:
375 if (CurrentTime - last_too_many2 >= (time_t) 60)
377 last_too_many2 = CurrentTime;
378 sendto_opmask_butone(0, SNO_TOOMANY, "Too many connections from "
380 get_client_name(sptr, SHOW_IP));
382 ++ServerStats->is_ref;
383 return exit_client(cptr, sptr, &me,
384 "Too many connections from your host");
385 case ACR_ALREADY_AUTHORIZED:
386 /* Can this ever happen? */
388 ++ServerStats->is_ref;
389 IPcheck_connect_fail(cli_ip(sptr));
390 return exit_client(cptr, sptr, &me, "Unknown error -- Try again");
392 ircd_strncpy(user->host, cli_sockhost(sptr), HOSTLEN);
393 aconf = cli_confs(sptr)->value.aconf;
395 clean_user_id(user->username,
396 (cli_flags(sptr) & FLAGS_GOTID) ? cli_username(sptr) : username,
397 (cli_flags(sptr) & FLAGS_DOID) && !(cli_flags(sptr) & FLAGS_GOTID));
399 if ((user->username[0] == '\0')
400 || ((user->username[0] == '~') && (user->username[1] == '\000')))
401 return exit_client(cptr, sptr, &me, "USER: Bogus userid.");
403 if (!EmptyString(aconf->passwd)
404 && !(IsDigit(*aconf->passwd) && !aconf->passwd[1])
405 && strcmp(cli_passwd(sptr), aconf->passwd))
407 ServerStats->is_ref++;
408 IPcheck_connect_fail(cli_ip(sptr));
409 send_reply(sptr, ERR_PASSWDMISMATCH);
410 return exit_client(cptr, sptr, &me, "Bad Password");
412 memset(cli_passwd(sptr), 0, sizeof(cli_passwd(sptr)));
414 * following block for the benefit of time-dependent K:-lines
416 if (find_kill(sptr)) {
417 ServerStats->is_ref++;
418 IPcheck_connect_fail(cli_ip(sptr));
419 return exit_client(cptr, sptr, &me, "K-lined");
422 * Check for mixed case usernames, meaning probably hacked. Jon2 3-94
423 * Summary of rules now implemented in this patch: Ensor 11-94
424 * In a mixed-case name, if first char is upper, one more upper may
425 * appear anywhere. (A mixed-case name *must* have an upper first
426 * char, and may have one other upper.)
427 * A third upper may appear if all 3 appear at the beginning of the
428 * name, separated only by "others" (-/_/.).
429 * A single group of digits is allowed anywhere.
430 * Two groups of digits are allowed if at least one of the groups is
431 * at the beginning or the end.
432 * Only one '-', '_', or '.' is allowed (or two, if not consecutive).
433 * But not as the first or last char.
434 * No other special characters are allowed.
435 * Name must contain at least one letter.
437 tmpstr2 = tmpstr = (username[0] == '~' ? &username[1] : username);
438 while (*tmpstr && !badid)
450 if ((leadcaps || pos == 1) && !lower && !digits)
456 if (pos == 1 || !IsDigit(d))
463 else if (c == '-' || c == '_' || c == '.')
468 else if (d == '-' || d == '_' || d == '.' || other > 2)
477 if (lower && upper && (!leadcaps || leadcaps > 3 ||
478 (upper > 2 && upper > leadcaps)))
480 else if (digitgroups == 2 && !(IsDigit(tmpstr2[0]) || IsDigit(c)))
482 else if ((!lower && !upper) || !IsAlnum(c))
485 if (badid && (!(cli_flags(sptr) & FLAGS_GOTID) ||
486 strcmp(cli_username(sptr), username) != 0))
488 ServerStats->is_ref++;
490 send_reply(cptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
491 ":Your username is invalid.");
492 send_reply(cptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
493 ":Connect with your real username, in lowercase.");
494 send_reply(cptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
495 ":If your mail address were foo@bar.com, your username "
497 return exit_client(cptr, sptr, &me, "USER: Bad username");
499 Count_unknownbecomesclient(sptr, UserStats);
502 ircd_strncpy(user->username, username, USERLEN);
503 Count_newremoteclient(UserStats, user->server);
507 /* a gline wasn't passed in, so find a matching global one that isn't
508 * a Uworld-set one, and propagate it if there is such an animal.
511 (agline = gline_lookup(sptr, GLINE_GLOBAL | GLINE_LASTMOD)) &&
512 !IsBurstOrBurstAck(cptr))
513 gline_resend(cptr, agline);
515 if (IsInvisible(sptr))
516 ++UserStats.inv_clients;
520 if (MyConnect(sptr)) {
521 cli_handler(sptr) = CLIENT_HANDLER;
522 release_dns_reply(sptr);
524 send_reply(sptr, RPL_WELCOME, nick);
526 * This is a duplicate of the NOTICE but see below...
528 send_reply(sptr, RPL_YOURHOST, cli_name(&me), version);
529 send_reply(sptr, RPL_CREATED, creation);
530 send_reply(sptr, RPL_MYINFO, cli_name(&me), version);
531 sprintf_irc(featurebuf,FEATURES,FEATURESVALUES);
532 send_reply(sptr, RPL_ISUPPORT, featurebuf);
533 m_lusers(sptr, sptr, 1, parv);
536 nextping = CurrentTime;
537 if (cli_snomask(sptr) & SNO_NOISY)
538 set_snomask(sptr, cli_snomask(sptr) & SNO_NOISY, SNO_ADD);
539 IPcheck_connect_succeeded(sptr);
542 /* if (IsServer(cptr)) */
544 struct Client *acptr;
546 acptr = user->server;
547 if (cli_from(acptr) != cli_from(sptr))
549 sendcmdto_one(&me, CMD_KILL, cptr, "%C :%s (%s != %s[%s])",
550 sptr, cli_name(&me), cli_name(user->server), cli_name(cli_from(acptr)),
551 cli_sockhost(cli_from(acptr)));
552 cli_flags(sptr) |= FLAGS_KILLED;
553 return exit_client(cptr, sptr, &me, "NICK server wrong direction");
556 cli_flags(sptr) |= (cli_flags(acptr) & FLAGS_TS8);
559 * Check to see if this user is being propogated
560 * as part of a net.burst, or is using protocol 9.
561 * FIXME: This can be speeded up - its stupid to check it for
562 * every NICK message in a burst again --Run.
564 for (acptr = user->server; acptr != &me; acptr = cli_serv(acptr)->up) {
565 if (IsBurst(acptr) || Protocol(acptr) < 10)
568 if (!IPcheck_remote_connect(sptr, (acptr != &me))) {
570 * We ran out of bits to count this
572 sendcmdto_one(&me, CMD_KILL, sptr, "%C :%s (Too many connections from your host -- Ghost)",
573 sptr, cli_name(&me));
574 return exit_client(cptr, sptr, &me,"Too many connections from your host -- throttled");
577 tmpstr = umode_str(sptr);
579 sendcmdto_serv_butone(user->server, CMD_NICK, cptr,
580 "%s %d %Tu %s %s %s%s%s%%%Tu:%s@%s %s %s%s :%s",
581 nick, cli_hopcount(sptr) + 1, cli_lastnick(sptr),
582 user->username, user->host,
583 *tmpstr ? "+" : "", tmpstr, *tmpstr ? " " : "",
584 GlineLastMod(agline), GlineUser(agline),
586 inttobase64(ip_base64, ntohl(cli_ip(sptr).s_addr), 6),
587 NumNick(sptr), cli_info(sptr));
589 sendcmdto_serv_butone(user->server, CMD_NICK, cptr,
590 "%s %d %Tu %s %s %s%s%s%s %s%s :%s",
591 nick, cli_hopcount(sptr) + 1, cli_lastnick(sptr),
592 user->username, user->host,
593 *tmpstr ? "+" : "", tmpstr, *tmpstr ? " " : "",
594 inttobase64(ip_base64, ntohl(cli_ip(sptr).s_addr), 6),
595 NumNick(sptr), cli_info(sptr));
597 /* Send umode to client */
600 send_umode(cptr, sptr, 0, ALL_UMODES);
601 if (cli_snomask(sptr) != SNO_DEFAULT && (cli_flags(sptr) & FLAGS_SERVNOTICE))
602 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
609 static const struct UserMode {
614 { FLAGS_LOCOP, 'O' },
615 { FLAGS_INVISIBLE, 'i' },
616 { FLAGS_WALLOP, 'w' },
617 { FLAGS_SERVNOTICE, 's' },
619 { FLAGS_CHSERV, 'k' },
623 #define USERMODELIST_SIZE sizeof(userModeList) / sizeof(struct UserMode)
626 * XXX - find a way to get rid of this
628 static char umodeBuf[BUFSIZE];
630 int set_nick_name(struct Client* cptr, struct Client* sptr,
631 const char* nick, int parc, char* parv[])
633 if (IsServer(sptr)) {
637 struct Gline *agline = 0;
640 * A server introducing a new client, change source
642 struct Client* new_client = make_client(cptr, STAT_UNKNOWN);
643 assert(0 != new_client);
645 cli_hopcount(new_client) = atoi(parv[2]);
646 cli_lastnick(new_client) = atoi(parv[3]);
647 if (Protocol(cptr) > 9 && parc > 7 && *parv[6] == '+') {
648 for (p = parv[6] + 1; *p; p++) {
649 for (i = 0; i < USERMODELIST_SIZE; ++i) {
650 if (userModeList[i].c == *p) {
651 cli_flags(new_client) |= userModeList[i].flag;
657 client_set_privs(new_client); /* set privs on user */
661 strcpy(cli_name(new_client), nick);
662 cli_user(new_client) = make_user(new_client);
663 cli_user(new_client)->server = sptr;
664 SetRemoteNumNick(new_client, parv[parc - 2]);
666 * IP# of remote client
668 cli_ip(new_client).s_addr = htonl(base64toint(parv[parc - 3]));
670 add_client_to_list(new_client);
671 hAddClient(new_client);
673 cli_serv(sptr)->ghost = 0; /* :server NICK means end of net.burst */
674 ircd_strncpy(cli_username(new_client), parv[4], USERLEN);
675 ircd_strncpy(cli_user(new_client)->host, parv[5], HOSTLEN);
676 ircd_strncpy(cli_info(new_client), parv[parc - 1], REALLEN);
678 /* Deal with GLINE parameters... */
679 if (*parv[parc - 4] == '%' && (t = strchr(parv[parc - 4] + 1, ':'))) {
683 lastmod = atoi(parv[parc - 4] + 1);
686 (agline = gline_find(t, GLINE_EXACT | GLINE_GLOBAL | GLINE_LASTMOD))
687 && GlineLastMod(agline) > lastmod && !IsBurstOrBurstAck(cptr))
688 gline_resend(cptr, agline);
690 return register_user(cptr, new_client, cli_name(new_client), parv[4], agline);
692 else if ((cli_name(sptr))[0]) {
694 * Client changing its nick
696 * If the client belongs to me, then check to see
697 * if client is on any channels where it is currently
698 * banned. If so, do not allow the nick change to occur.
701 const char* channel_name;
702 if ((channel_name = find_no_nickchange_channel(sptr))) {
703 return send_reply(cptr, ERR_BANNICKCHANGE, channel_name);
706 * Refuse nick change if the last nick change was less
707 * then 30 seconds ago. This is intended to get rid of
708 * clone bots doing NICK FLOOD. -SeKs
709 * If someone didn't change their nick for more then 60 seconds
710 * however, allow to do two nick changes immedately after another
711 * before limiting the nick flood. -Run
713 if (CurrentTime < cli_nextnick(cptr)) {
714 cli_nextnick(cptr) += 2;
715 send_reply(cptr, ERR_NICKTOOFAST, parv[1],
716 cli_nextnick(cptr) - CurrentTime);
717 /* Send error message */
718 sendcmdto_one(cptr, CMD_NICK, cptr, "%s", cli_name(cptr));
719 /* bounce NICK to user */
720 return 0; /* ignore nick change! */
723 /* Limit total to 1 change per NICK_DELAY seconds: */
724 cli_nextnick(cptr) += NICK_DELAY;
725 /* However allow _maximal_ 1 extra consecutive nick change: */
726 if (cli_nextnick(cptr) < CurrentTime)
727 cli_nextnick(cptr) = CurrentTime;
731 * Also set 'lastnick' to current time, if changed.
733 if (0 != ircd_strcmp(parv[0], nick))
734 cli_lastnick(sptr) = (sptr == cptr) ? TStime() : atoi(parv[2]);
737 * Client just changing his/her nick. If he/she is
738 * on a channel, send note of change to all clients
739 * on that channel. Propagate notice to other servers.
742 sendcmdto_common_channels(sptr, CMD_NICK, ":%s", nick);
743 add_history(sptr, 1);
744 sendcmdto_serv_butone(sptr, CMD_NICK, cptr, "%s %Tu", nick,
748 sendcmdto_one(sptr, CMD_NICK, sptr, ":%s", nick);
750 if ((cli_name(sptr))[0])
752 strcpy(cli_name(sptr), nick);
756 /* Local client setting NICK the first time */
758 strcpy(cli_name(sptr), nick);
759 if (!cli_user(sptr)) {
760 cli_user(sptr) = make_user(sptr);
761 cli_user(sptr)->server = &me;
763 SetLocalNumNick(sptr);
767 * If the client hasn't gotten a cookie-ping yet,
768 * choose a cookie and send it. -record!jegelhof@cloud9.net
770 if (!cli_cookie(sptr)) {
772 cli_cookie(sptr) = (ircrandom() & 0x7fffffff);
773 } while (!cli_cookie(sptr));
774 sendrawto_one(cptr, MSG_PING " :%u", cli_cookie(sptr));
776 else if (*(cli_user(sptr))->host && cli_cookie(sptr) == COOKIE_VERIFIED) {
778 * USER and PONG already received, now we have NICK.
779 * register_user may reject the client and call exit_client
780 * for it - must test this and exit m_nick too !
782 cli_lastnick(sptr) = TStime(); /* Always local client */
783 if (register_user(cptr, sptr, nick, cli_user(sptr)->username, 0) == CPTR_KILLED)
790 static unsigned char hash_target(unsigned int target)
792 return (unsigned char) (target >> 16) ^ (target >> 8);
798 * sptr must be a local client!
800 * Cannonifies target for client `sptr'.
802 void add_target(struct Client *sptr, void *target)
804 /* Ok, this shouldn't work esp on alpha
806 unsigned char hash = hash_target((unsigned long) target);
807 unsigned char* targets;
810 assert(cli_local(sptr));
812 targets = cli_targets(sptr);
816 for (i = 0; i < MAXTARGETS; ++i) {
817 if (targets[i] == hash)
823 memmove(&targets[RESERVEDTARGETS + 1],
824 &targets[RESERVEDTARGETS], MAXTARGETS - RESERVEDTARGETS - 1);
825 targets[RESERVEDTARGETS] = hash;
831 * sptr must be a local client !
833 * Returns 'true' (1) when too many targets are addressed.
834 * Returns 'false' (0) when it's ok to send to this target.
836 int check_target_limit(struct Client *sptr, void *target, const char *name,
839 unsigned char hash = hash_target((unsigned long) target);
841 unsigned char* targets;
844 assert(cli_local(sptr));
845 targets = cli_targets(sptr);
848 * Same target as last time?
850 if (targets[0] == hash)
852 for (i = 1; i < MAXTARGETS; ++i) {
853 if (targets[i] == hash) {
854 memmove(&targets[1], &targets[0], i);
863 if (CurrentTime < cli_nexttarget(sptr)) {
864 if (cli_nexttarget(sptr) - CurrentTime < TARGET_DELAY + 8) {
868 cli_nexttarget(sptr) += 2;
869 send_reply(sptr, ERR_TARGETTOOFAST, name,
870 cli_nexttarget(sptr) - CurrentTime);
875 cli_nexttarget(sptr) += TARGET_DELAY;
876 if (cli_nexttarget(sptr) < CurrentTime - (TARGET_DELAY * (MAXTARGETS - 1)))
877 cli_nexttarget(sptr) = CurrentTime - (TARGET_DELAY * (MAXTARGETS - 1));
880 memmove(&targets[1], &targets[0], MAXTARGETS - 1);
886 * whisper - called from m_cnotice and m_cprivmsg.
888 * parv[0] = sender prefix
891 * parv[3] = Private message text
893 * Added 971023 by Run.
894 * Reason: Allows channel operators to sent an arbitrary number of private
895 * messages to users on their channel, avoiding the max.targets limit.
896 * Building this into m_private would use too much cpu because we'd have
897 * to a cross channel lookup for every private message!
898 * Note that we can't allow non-chan ops to use this command, it would be
899 * abused by mass advertisers.
902 int whisper(struct Client* source, const char* nick, const char* channel,
903 const char* text, int is_notice)
906 struct Channel* chptr;
907 struct Membership* membership;
911 assert(0 != channel);
912 assert(MyUser(source));
914 if (!(dest = FindUser(nick))) {
915 return send_reply(source, ERR_NOSUCHNICK, nick);
917 if (!(chptr = FindChannel(channel))) {
918 return send_reply(source, ERR_NOSUCHCHANNEL, channel);
921 * compare both users channel lists, instead of the channels user list
922 * since the link is the same, this should be a little faster for channels
923 * with a lot of users
925 for (membership = cli_user(source)->channel; membership; membership = membership->next_channel) {
926 if (chptr == membership->channel)
929 if (0 == membership) {
930 return send_reply(source, ERR_NOTONCHANNEL, chptr->chname);
932 if (!IsVoicedOrOpped(membership)) {
933 return send_reply(source, ERR_VOICENEEDED, chptr->chname);
936 * lookup channel in destination
938 assert(0 != cli_user(dest));
939 for (membership = cli_user(dest)->channel; membership; membership = membership->next_channel) {
940 if (chptr == membership->channel)
943 if (0 == membership || IsZombie(membership)) {
944 return send_reply(source, ERR_USERNOTINCHANNEL, cli_name(dest), chptr->chname);
946 if (is_silenced(source, dest))
949 if (cli_user(dest)->away)
950 send_reply(source, RPL_AWAY, cli_name(dest), cli_user(dest)->away);
952 sendcmdto_one(source, CMD_NOTICE, dest, "%C :%s", dest, text);
954 sendcmdto_one(source, CMD_PRIVATE, dest, "%C :%s", dest, text);
960 * added Sat Jul 25 07:30:42 EST 1992
962 void send_umode_out(struct Client *cptr, struct Client *sptr, int old,
966 struct Client *acptr;
968 send_umode(NULL, sptr, old, SEND_UMODES & ~(prop ? 0 : FLAGS_OPER));
970 for (i = HighestFd; i >= 0; i--) {
971 if ((acptr = LocalClientArray[i]) && IsServer(acptr) &&
972 (acptr != cptr) && (acptr != sptr) && *umodeBuf)
973 sendcmdto_one(sptr, CMD_MODE, acptr, "%s :%s", cli_name(sptr), umodeBuf);
975 if (cptr && MyUser(cptr))
976 send_umode(cptr, sptr, old, ALL_UMODES);
981 * send_user_info - send user info userip/userhost
982 * NOTE: formatter must put info into buffer and return a pointer to the end of
983 * the data it put in the buffer.
985 void send_user_info(struct Client* sptr, char* names, int rpl, InfoFormatter fmt)
991 struct Client* acptr;
998 mb = msgq_make(sptr, rpl_str(rpl), cli_name(&me), cli_name(sptr));
1000 for (name = ircd_strtok(&p, names, " "); name; name = ircd_strtok(&p, 0, " ")) {
1001 if ((acptr = FindUser(name))) {
1003 msgq_append(0, mb, " ");
1006 if (5 == ++arg_count)
1009 send_buffer(sptr, mb, 0);
1015 * set_user_mode() added 15/10/91 By Darren Reed.
1018 * parv[1] - username to change mode for
1019 * parv[2] - modes to change
1021 int set_user_mode(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
1025 struct Client *acptr;
1029 unsigned int tmpmask = 0;
1030 int snomask_given = 0;
1037 return need_more_params(sptr, "MODE");
1039 if (!(acptr = FindUser(parv[1])))
1041 if (MyConnect(sptr))
1042 send_reply(sptr, ERR_NOSUCHCHANNEL, parv[1]);
1046 if (IsServer(sptr) || sptr != acptr)
1049 sendcmdto_flag_butone(&me, CMD_WALLOPS, 0, FLAGS_WALLOP,
1050 ":MODE for User %s from %s!%s", parv[1],
1051 cli_name(cptr), cli_name(sptr));
1053 send_reply(sptr, ERR_USERSDONTMATCH);
1061 for (i = 0; i < USERMODELIST_SIZE; ++i) {
1062 if ( (userModeList[i].flag & cli_flags(sptr)))
1063 *m++ = userModeList[i].c;
1066 send_reply(sptr, RPL_UMODEIS, buf);
1067 if ((cli_flags(sptr) & FLAGS_SERVNOTICE) && MyConnect(sptr)
1068 && cli_snomask(sptr) !=
1069 (unsigned int)(IsOper(sptr) ? SNO_OPERDEFAULT : SNO_DEFAULT))
1070 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
1075 * find flags already set for user
1076 * why not just copy them?
1078 setflags = cli_flags(sptr);
1080 if (MyConnect(sptr))
1081 tmpmask = cli_snomask(sptr);
1084 * parse mode change string(s)
1086 for (p = &parv[2]; *p; p++) { /* p is changed in loop too */
1087 for (m = *p; *m; m++) {
1096 if (*(p + 1) && is_snomask(*(p + 1))) {
1098 tmpmask = umode_make_snomask(tmpmask, *++p, what);
1099 tmpmask &= (IsAnOper(sptr) ? SNO_ALL : SNO_USER);
1102 tmpmask = (what == MODE_ADD) ?
1103 (IsAnOper(sptr) ? SNO_OPERDEFAULT : SNO_DEFAULT) : 0;
1105 SetServNotice(sptr);
1107 ClearServNotice(sptr);
1110 if (what == MODE_ADD)
1116 if (what == MODE_ADD)
1119 cli_flags(sptr) &= ~(FLAGS_OPER | FLAGS_LOCOP);
1120 if (MyConnect(sptr)) {
1121 tmpmask = cli_snomask(sptr) & ~SNO_OPER;
1122 cli_handler(sptr) = CLIENT_HANDLER;
1127 if (what == MODE_ADD)
1130 cli_flags(sptr) &= ~(FLAGS_OPER | FLAGS_LOCOP);
1131 if (MyConnect(sptr)) {
1132 tmpmask = cli_snomask(sptr) & ~SNO_OPER;
1133 cli_handler(sptr) = CLIENT_HANDLER;
1138 if (what == MODE_ADD)
1141 ClearInvisible(sptr);
1144 if (what == MODE_ADD)
1150 if (what == MODE_ADD)
1151 SetChannelService(sptr);
1153 ClearChannelService(sptr);
1156 if (what == MODE_ADD)
1167 * Evaluate rules for new user mode
1168 * Stop users making themselves operators too easily:
1170 if (!IsServer(cptr)) {
1171 if (!(setflags & FLAGS_OPER) && IsOper(sptr))
1173 if (!(setflags & FLAGS_LOCOP) && IsLocOp(sptr))
1176 * new umode; servers can set it, local users cannot;
1177 * prevents users from /kick'ing or /mode -o'ing
1179 if (!(setflags & FLAGS_CHSERV))
1180 ClearChannelService(sptr);
1182 * only send wallops to opers
1184 if (feature_bool(FEAT_WALLOPS_OPER_ONLY) && !IsAnOper(sptr) &&
1185 !(setflags & FLAGS_WALLOP))
1187 #ifdef SERVNOTICE_OPER_ONLY
1188 if (MyConnect(sptr) && !IsAnOper(sptr) && !(setflags & FLAGS_SERVNOTICE)) {
1189 ClearServNotice(sptr);
1190 set_snomask(sptr, 0, SNO_SET);
1193 #ifdef DEBUG_OPER_ONLY
1194 if (!IsAnOper(sptr) && !(setflags & FLAGS_DEBUG))
1198 if (MyConnect(sptr)) {
1199 if ((setflags & (FLAGS_OPER | FLAGS_LOCOP)) && !IsAnOper(sptr))
1200 det_confs_butmask(sptr, CONF_CLIENT & ~CONF_OPS);
1202 if (SendServNotice(sptr)) {
1203 if (tmpmask != cli_snomask(sptr))
1204 set_snomask(sptr, tmpmask, SNO_SET);
1205 if (cli_snomask(sptr) && snomask_given)
1206 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
1210 * Compare new flags with old flags and send string which
1211 * will cause servers to update correctly.
1213 if (!(setflags & FLAGS_OPER) && IsOper(sptr)) { /* user now oper */
1215 client_set_privs(sptr); /* may set propagate privilege */
1217 if (HasPriv(sptr, PRIV_PROPAGATE)) /* remember propagate privilege setting */
1219 if ((setflags & FLAGS_OPER) && !IsOper(sptr)) { /* user no longer oper */
1221 client_set_privs(sptr); /* will clear propagate privilege */
1223 if ((setflags & FLAGS_INVISIBLE) && !IsInvisible(sptr))
1224 --UserStats.inv_clients;
1225 if (!(setflags & FLAGS_INVISIBLE) && IsInvisible(sptr))
1226 ++UserStats.inv_clients;
1227 send_umode_out(cptr, sptr, setflags, prop);
1233 * Build umode string for BURST command
1236 char *umode_str(struct Client *cptr)
1238 char* m = umodeBuf; /* Maximum string size: "owidg\0" */
1242 c_flags = cli_flags(cptr) & SEND_UMODES; /* cleaning up the original code */
1243 if (HasPriv(cptr, PRIV_PROPAGATE))
1244 c_flags |= FLAGS_OPER;
1246 c_flags &= ~FLAGS_OPER;
1248 for (i = 0; i < USERMODELIST_SIZE; ++i) {
1249 if ( (c_flags & userModeList[i].flag))
1250 *m++ = userModeList[i].c;
1254 return umodeBuf; /* Note: static buffer, gets
1255 overwritten by send_umode() */
1259 * Send the MODE string for user (user) to connection cptr
1262 void send_umode(struct Client *cptr, struct Client *sptr, int old, int sendmask)
1267 int what = MODE_NULL;
1270 * Build a string in umodeBuf to represent the change in the user's
1271 * mode between the new (sptr->flag) and 'old'.
1275 for (i = 0; i < USERMODELIST_SIZE; ++i) {
1276 flag = userModeList[i].flag;
1277 if (MyUser(sptr) && !(flag & sendmask))
1279 if ( (flag & old) && !(cli_flags(sptr) & flag))
1281 if (what == MODE_DEL)
1282 *m++ = userModeList[i].c;
1287 *m++ = userModeList[i].c;
1290 else if (!(flag & old) && (cli_flags(sptr) & flag))
1292 if (what == MODE_ADD)
1293 *m++ = userModeList[i].c;
1298 *m++ = userModeList[i].c;
1303 if (*umodeBuf && cptr)
1304 sendcmdto_one(sptr, CMD_MODE, cptr, "%s :%s", cli_name(sptr), umodeBuf);
1308 * Check to see if this resembles a sno_mask. It is if 1) there is
1309 * at least one digit and 2) The first digit occurs before the first
1310 * alphabetic character.
1312 int is_snomask(char *word)
1316 for (; *word; word++)
1319 else if (IsAlpha(*word))
1326 * If it begins with a +, count this as an additive mask instead of just
1327 * a replacement. If what == MODE_DEL, "+" has no special effect.
1329 unsigned int umode_make_snomask(unsigned int oldmask, char *arg, int what)
1331 unsigned int sno_what;
1332 unsigned int newmask;
1336 if (what == MODE_ADD)
1341 else if (*arg == '-')
1344 if (what == MODE_ADD)
1350 sno_what = (what == MODE_ADD) ? SNO_SET : SNO_DEL;
1351 /* pity we don't have strtoul everywhere */
1352 newmask = (unsigned int)atoi(arg);
1353 if (sno_what == SNO_DEL)
1354 newmask = oldmask & ~newmask;
1355 else if (sno_what == SNO_ADD)
1360 static void delfrom_list(struct Client *cptr, struct SLink **list)
1363 struct SLink* prv = NULL;
1365 for (tmp = *list; tmp; tmp = tmp->next) {
1366 if (tmp->value.cptr == cptr) {
1368 prv->next = tmp->next;
1379 * This function sets a Client's server notices mask, according to
1380 * the parameter 'what'. This could be even faster, but the code
1381 * gets mighty hard to read :)
1383 void set_snomask(struct Client *cptr, unsigned int newmask, int what)
1385 unsigned int oldmask, diffmask; /* unsigned please */
1389 oldmask = cli_snomask(cptr);
1391 if (what == SNO_ADD)
1393 else if (what == SNO_DEL)
1394 newmask = oldmask & ~newmask;
1395 else if (what != SNO_SET) /* absolute set, no math needed */
1396 sendto_opmask_butone(0, SNO_OLDSNO, "setsnomask called with %d ?!", what);
1398 newmask &= (IsAnOper(cptr) ? SNO_ALL : SNO_USER);
1400 diffmask = oldmask ^ newmask;
1402 for (i = 0; diffmask >> i; i++) {
1403 if (((diffmask >> i) & 1))
1405 if (((newmask >> i) & 1))
1408 tmp->next = opsarray[i];
1409 tmp->value.cptr = cptr;
1413 /* not real portable :( */
1414 delfrom_list(cptr, &opsarray[i]);
1417 cli_snomask(cptr) = newmask;
1421 * is_silenced : Does the actual check wether sptr is allowed
1422 * to send a message to acptr.
1423 * Both must be registered persons.
1424 * If sptr is silenced by acptr, his message should not be propagated,
1425 * but more over, if this is detected on a server not local to sptr
1426 * the SILENCE mask is sent upstream.
1428 int is_silenced(struct Client *sptr, struct Client *acptr)
1432 static char sender[HOSTLEN + NICKLEN + USERLEN + 5];
1433 static char senderip[16 + NICKLEN + USERLEN + 5];
1435 if (!cli_user(acptr) || !(lp = cli_user(acptr)->silence) || !(user = cli_user(sptr)))
1437 sprintf_irc(sender, "%s!%s@%s", cli_name(sptr), user->username, user->host);
1438 sprintf_irc(senderip, "%s!%s@%s", cli_name(sptr), user->username,
1439 ircd_ntoa((const char*) &(cli_ip(sptr))));
1440 for (; lp; lp = lp->next)
1442 if ((!(lp->flags & CHFL_SILENCE_IPMASK) && !match(lp->value.cp, sender)) ||
1443 ((lp->flags & CHFL_SILENCE_IPMASK) && !match(lp->value.cp, senderip)))
1445 if (!MyConnect(sptr))
1447 sendcmdto_one(acptr, CMD_SILENCE, cli_from(sptr), "%C %s", sptr,
1459 * Removes all silence masks from the list of sptr that fall within `mask'
1460 * Returns -1 if none where found, 0 otherwise.
1462 int del_silence(struct Client *sptr, char *mask)
1468 for (lp = &(cli_user(sptr))->silence; *lp;) {
1469 if (!mmatch(mask, (*lp)->value.cp))
1473 MyFree(tmp->value.cp);
1483 int add_silence(struct Client* sptr, const char* mask)
1485 struct SLink *lp, **lpp;
1486 int cnt = 0, len = strlen(mask);
1489 for (lpp = &(cli_user(sptr))->silence, lp = *lpp; lp;)
1491 if (0 == ircd_strcmp(mask, lp->value.cp))
1493 if (!mmatch(mask, lp->value.cp))
1495 struct SLink *tmp = lp;
1496 *lpp = lp = lp->next;
1497 MyFree(tmp->value.cp);
1503 len += strlen(lp->value.cp);
1504 if ((len > (feature_int(FEAT_AVBANLEN) * feature_int(FEAT_MAXSILES))) ||
1505 (++cnt >= feature_int(FEAT_MAXSILES)))
1507 send_reply(sptr, ERR_SILELISTFULL, mask);
1510 else if (!mmatch(lp->value.cp, mask))
1517 memset(lp, 0, sizeof(struct SLink));
1518 lp->next = cli_user(sptr)->silence;
1519 lp->value.cp = (char*) MyMalloc(strlen(mask) + 1);
1520 assert(0 != lp->value.cp);
1521 strcpy(lp->value.cp, mask);
1522 if ((ip_start = strrchr(mask, '@')) && check_if_ipmask(ip_start + 1))
1523 lp->flags = CHFL_SILENCE_IPMASK;
1524 cli_user(sptr)->silence = lp;