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_reply.h"
39 #include "ircd_snprintf.h"
40 #include "ircd_string.h"
49 #include "querycmds.h"
55 #include "s_serv.h" /* max_client_count */
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
177 * target server. It can be a nickname, servername,
178 * or server mask (from a local user) or a server
179 * numeric (from a remote server).
182 * parv[server] is replaced with the pointer to the
183 * real servername from the matched client (I'm lazy
186 * returns: (see #defines)
188 int hunt_server_cmd(struct Client *from, const char *cmd, const char *tok,
189 struct Client *one, int MustBeOper, const char *pattern,
190 int server, int parc, char *parv[])
192 struct Client *acptr;
195 /* Assume it's me, if no server or an unregistered client */
196 if (parc <= server || EmptyString((to = parv[server])) || IsUnknown(from))
197 return (HUNTED_ISME);
199 if (MustBeOper && !IsPrivileged(from))
201 send_reply(from, ERR_NOPRIVILEGES);
202 return HUNTED_NOSUCH;
205 /* Make sure it's a server */
207 /* Make sure it's a server */
208 if (!strchr(to, '*')) {
209 if (0 == (acptr = FindClient(to))) {
210 send_reply(from, ERR_NOSUCHSERVER, to);
211 return HUNTED_NOSUCH;
215 acptr = cli_user(acptr)->server;
216 } else if (!(acptr = find_match_server(to))) {
217 send_reply(from, ERR_NOSUCHSERVER, to);
218 return (HUNTED_NOSUCH);
220 } else if (!(acptr = FindNServer(to)))
221 return (HUNTED_NOSUCH); /* Server broke off in the meantime */
224 return (HUNTED_ISME);
226 if (MustBeOper && !IsPrivileged(from)) {
227 send_reply(from, ERR_NOPRIVILEGES);
228 return HUNTED_NOSUCH;
231 /* assert(!IsServer(from)); */
233 parv[server] = (char *) acptr; /* HACK! HACK! HACK! ARGH! */
235 sendcmdto_one(from, cmd, tok, acptr, pattern, parv[1], parv[2], parv[3],
236 parv[4], parv[5], parv[6], parv[7], parv[8]);
238 return (HUNTED_PASS);
241 int hunt_server_prio_cmd(struct Client *from, const char *cmd, const char *tok,
242 struct Client *one, int MustBeOper,
243 const char *pattern, int server, int parc,
246 struct Client *acptr;
249 /* Assume it's me, if no server or an unregistered client */
250 if (parc <= server || EmptyString((to = parv[server])) || IsUnknown(from))
251 return (HUNTED_ISME);
253 /* Make sure it's a server */
255 /* Make sure it's a server */
256 if (!strchr(to, '*')) {
257 if (0 == (acptr = FindClient(to))) {
258 send_reply(from, ERR_NOSUCHSERVER, to);
259 return HUNTED_NOSUCH;
263 acptr = cli_user(acptr)->server;
264 } else if (!(acptr = find_match_server(to))) {
265 send_reply(from, ERR_NOSUCHSERVER, to);
266 return (HUNTED_NOSUCH);
268 } else if (!(acptr = FindNServer(to)))
269 return (HUNTED_NOSUCH); /* Server broke off in the meantime */
272 return (HUNTED_ISME);
274 if (MustBeOper && !IsPrivileged(from)) {
275 send_reply(from, ERR_NOPRIVILEGES);
276 return HUNTED_NOSUCH;
279 /* assert(!IsServer(from)); SETTIME to particular destinations permitted */
281 parv[server] = (char *) acptr; /* HACK! HACK! HACK! ARGH! */
283 sendcmdto_prio_one(from, cmd, tok, acptr, pattern, parv[1], parv[2], parv[3],
284 parv[4], parv[5], parv[6], parv[7], parv[8]);
286 return (HUNTED_PASS);
293 * Copy `source' to `dest', replacing all occurances of '~' and characters that
294 * are not `isIrcUi' by an underscore.
295 * Copies at most USERLEN - 1 characters or up till the first control character.
296 * If `tilde' is true, then a tilde is prepended to `dest'.
297 * Note that `dest' and `source' can point to the same area or to different
298 * non-overlapping areas.
300 static char *clean_user_id(char *dest, char *source, int tilde)
307 ch = *s++; /* Store first character to copy: */
310 *d++ = '~'; /* If `dest' == `source', then this overwrites `ch' */
313 while (ch && !IsCntrl(ch) && rlen--)
315 char nch = *s++; /* Store next character to copy */
316 *d++ = IsUserChar(ch) ? ch : '_'; /* This possibly overwrites it */
329 * This function is called when both NICK and USER messages
330 * have been accepted for the client, in whatever order. Only
331 * after this the USER message is propagated.
333 * NICK's must be propagated at once when received, although
334 * it would be better to delay them too until full info is
335 * available. Doing it is not so simple though, would have
336 * to implement the following:
338 * 1) user telnets in and gives only "NICK foobar" and waits
339 * 2) another user far away logs in normally with the nick
340 * "foobar" (quite legal, as this server didn't propagate it).
341 * 3) now this server gets nick "foobar" from outside, but
342 * has already the same defined locally. Current server
343 * would just issue "KILL foobar" to clean out dups. But,
344 * this is not fair. It should actually request another
345 * nick from local user or kill him/her...
347 int register_user(struct Client *cptr, struct Client *sptr,
348 const char *nick, char *username)
350 struct ConfItem* aconf;
354 char c = 0; /* not alphanum */
355 char d = 'a'; /* not a digit */
363 short digitgroups = 0;
364 struct User* user = cli_user(sptr);
367 user->last = CurrentTime;
368 parv[0] = cli_name(sptr);
369 parv[1] = parv[2] = NULL;
373 static time_t last_too_many1;
374 static time_t last_too_many2;
376 assert(cptr == sptr);
377 switch (conf_check_client(sptr))
381 case ACR_NO_AUTHORIZATION:
382 sendto_opmask_butone(0, SNO_UNAUTH, "Unauthorized connection from %s.",
383 get_client_name(sptr, HIDE_IP));
384 ++ServerStats->is_ref;
385 return exit_client(cptr, sptr, &me,
386 "No Authorization - use another server");
387 case ACR_TOO_MANY_IN_CLASS:
388 if (CurrentTime - last_too_many1 >= (time_t) 60)
390 last_too_many1 = CurrentTime;
391 sendto_opmask_butone(0, SNO_TOOMANY, "Too many connections in "
392 "class %i for %s.", get_client_class(sptr),
393 get_client_name(sptr, SHOW_IP));
395 ++ServerStats->is_ref;
396 IPcheck_connect_fail(cli_ip(sptr));
397 return exit_client(cptr, sptr, &me,
398 "Sorry, your connection class is full - try "
399 "again later or try another server");
400 case ACR_TOO_MANY_FROM_IP:
401 if (CurrentTime - last_too_many2 >= (time_t) 60)
403 last_too_many2 = CurrentTime;
404 sendto_opmask_butone(0, SNO_TOOMANY, "Too many connections from "
406 get_client_name(sptr, SHOW_IP));
408 ++ServerStats->is_ref;
409 return exit_client(cptr, sptr, &me,
410 "Too many connections from your host");
411 case ACR_ALREADY_AUTHORIZED:
412 /* Can this ever happen? */
414 ++ServerStats->is_ref;
415 IPcheck_connect_fail(cli_ip(sptr));
416 return exit_client(cptr, sptr, &me, "Unknown error -- Try again");
418 ircd_strncpy(user->host, cli_sockhost(sptr), HOSTLEN);
419 ircd_strncpy(user->realhost, cli_sockhost(sptr), HOSTLEN);
420 aconf = cli_confs(sptr)->value.aconf;
422 clean_user_id(user->username,
423 HasFlag(sptr, FLAG_GOTID) ? cli_username(sptr) : username,
424 HasFlag(sptr, FLAG_DOID) && !HasFlag(sptr, FLAG_GOTID));
426 if ((user->username[0] == '\0')
427 || ((user->username[0] == '~') && (user->username[1] == '\000')))
428 return exit_client(cptr, sptr, &me, "USER: Bogus userid.");
430 if (!EmptyString(aconf->passwd)
431 && !(IsDigit(*aconf->passwd) && !aconf->passwd[1])
432 && strcmp(cli_passwd(sptr), aconf->passwd))
434 ServerStats->is_ref++;
435 IPcheck_connect_fail(cli_ip(sptr));
436 send_reply(sptr, ERR_PASSWDMISMATCH);
437 return exit_client(cptr, sptr, &me, "Bad Password");
439 memset(cli_passwd(sptr), 0, sizeof(cli_passwd(sptr)));
441 * following block for the benefit of time-dependent K:-lines
443 if (find_kill(sptr)) {
444 ServerStats->is_ref++;
445 IPcheck_connect_fail(cli_ip(sptr));
446 return exit_client(cptr, sptr, &me, "K-lined");
449 * Check for mixed case usernames, meaning probably hacked. Jon2 3-94
450 * Summary of rules now implemented in this patch: Ensor 11-94
451 * In a mixed-case name, if first char is upper, one more upper may
452 * appear anywhere. (A mixed-case name *must* have an upper first
453 * char, and may have one other upper.)
454 * A third upper may appear if all 3 appear at the beginning of the
455 * name, separated only by "others" (-/_/.).
456 * A single group of digits is allowed anywhere.
457 * Two groups of digits are allowed if at least one of the groups is
458 * at the beginning or the end.
459 * Only one '-', '_', or '.' is allowed (or two, if not consecutive).
460 * But not as the first or last char.
461 * No other special characters are allowed.
462 * Name must contain at least one letter.
464 tmpstr2 = tmpstr = (username[0] == '~' ? &username[1] : username);
465 while (*tmpstr && !badid)
477 if ((leadcaps || pos == 1) && !lower && !digits)
483 if (pos == 1 || !IsDigit(d))
490 else if (c == '-' || c == '_' || c == '.')
495 else if (d == '-' || d == '_' || d == '.' || other > 2)
504 if (lower && upper && (!leadcaps || leadcaps > 3 ||
505 (upper > 2 && upper > leadcaps)))
507 else if (digitgroups == 2 && !(IsDigit(tmpstr2[0]) || IsDigit(c)))
509 else if ((!lower && !upper) || !IsAlnum(c))
512 if (badid && (!HasFlag(sptr, FLAG_GOTID) ||
513 strcmp(cli_username(sptr), username) != 0))
515 ServerStats->is_ref++;
517 send_reply(cptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
518 ":Your username is invalid.");
519 send_reply(cptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
520 ":Connect with your real username, in lowercase.");
521 send_reply(cptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
522 ":If your mail address were foo@bar.com, your username "
524 return exit_client(cptr, sptr, &me, "USER: Bad username");
526 Count_unknownbecomesclient(sptr, UserStats);
529 ircd_strncpy(user->username, username, USERLEN);
530 Count_newremoteclient(UserStats, user->server);
534 if (IsInvisible(sptr))
535 ++UserStats.inv_clients;
539 if (MyConnect(sptr)) {
540 cli_handler(sptr) = CLIENT_HANDLER;
541 release_dns_reply(sptr);
545 feature_str(FEAT_PROVIDER) ? " via " : "",
546 feature_str(FEAT_PROVIDER) ? feature_str(FEAT_PROVIDER) : "",
549 * This is a duplicate of the NOTICE but see below...
551 send_reply(sptr, RPL_YOURHOST, cli_name(&me), version);
552 send_reply(sptr, RPL_CREATED, creation);
553 send_reply(sptr, RPL_MYINFO, cli_name(&me), infousermodes, infochanmodes,
554 infochanmodeswithparams, version);
555 send_supported(sptr);
556 m_lusers(sptr, sptr, 1, parv);
559 /* nextping = CurrentTime; */
560 if (cli_snomask(sptr) & SNO_NOISY)
561 set_snomask(sptr, cli_snomask(sptr) & SNO_NOISY, SNO_ADD);
562 if (feature_bool(FEAT_CONNEXIT_NOTICES))
563 sendto_opmask_butone(0, SNO_CONNEXIT,
564 "Client connecting: %s (%s@%s) [%s] {%d}",
565 cli_name(sptr), user->username, user->host,
566 cli_sock_ip(sptr), get_client_class(sptr));
568 IPcheck_connect_succeeded(sptr);
570 * Set user's initial modes
572 parv[0] = (char*)nick;
573 parv[1] = (char*)nick;
574 parv[2] = (char*)client_get_default_umode(sptr);
575 parv[3] = NULL; /* needed in case of +s */
576 set_user_mode(sptr, sptr, 3, parv);
577 ClearHiddenHost(sptr); /* just in case somebody stuck +x in there */
580 /* if (IsServer(cptr)) */
582 struct Client *acptr;
584 acptr = user->server;
585 if (cli_from(acptr) != cli_from(sptr))
587 sendcmdto_one(&me, CMD_KILL, cptr, "%C :%s (%s != %s[%s])",
588 sptr, cli_name(&me), cli_name(user->server), cli_name(cli_from(acptr)),
589 cli_sockhost(cli_from(acptr)));
590 SetFlag(sptr, FLAG_KILLED);
591 return exit_client(cptr, sptr, &me, "NICK server wrong direction");
593 else if (HasFlag(acptr, FLAG_TS8))
594 SetFlag(sptr, FLAG_TS8);
597 * Check to see if this user is being propogated
598 * as part of a net.burst, or is using protocol 9.
599 * FIXME: This can be speeded up - its stupid to check it for
600 * every NICK message in a burst again --Run.
602 for (acptr = user->server; acptr != &me; acptr = cli_serv(acptr)->up)
604 if (IsBurst(acptr) || Protocol(acptr) < 10)
607 if (!IPcheck_remote_connect(sptr, (acptr != &me)))
610 * We ran out of bits to count this
612 sendcmdto_one(&me, CMD_KILL, sptr, "%C :%s (Too many connections from your host -- Ghost)",
613 sptr, cli_name(&me));
614 return exit_client(cptr, sptr, &me,"Too many connections from your host -- throttled");
617 tmpstr = umode_str(sptr);
618 sendcmdto_serv_butone(user->server, CMD_NICK, cptr,
619 "%s %d %Tu %s %s %s%s%s%s %s%s :%s",
620 nick, cli_hopcount(sptr) + 1, cli_lastnick(sptr),
621 user->username, user->realhost,
622 *tmpstr ? "+" : "", tmpstr, *tmpstr ? " " : "",
623 inttobase64(ip_base64, ntohl(cli_ip(sptr).s_addr), 6),
624 NumNick(sptr), cli_info(sptr));
626 /* Send server notice mask to client */
627 if (MyUser(sptr) && (cli_snomask(sptr) != SNO_DEFAULT) && HasFlag(sptr, FLAG_SERVNOTICE))
628 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
634 static const struct UserMode {
640 { FLAG_INVISIBLE, 'i' },
641 { FLAG_WALLOP, 'w' },
642 { FLAG_SERVNOTICE, 's' },
644 { FLAG_CHSERV, 'k' },
646 { FLAG_ACCOUNT, 'r' },
647 { FLAG_HIDDENHOST, 'x' }
650 #define USERMODELIST_SIZE sizeof(userModeList) / sizeof(struct UserMode)
653 * XXX - find a way to get rid of this
655 static char umodeBuf[BUFSIZE];
657 int set_nick_name(struct Client* cptr, struct Client* sptr,
658 const char* nick, int parc, char* parv[])
660 if (IsServer(sptr)) {
662 const char* account = 0;
666 * A server introducing a new client, change source
668 struct Client* new_client = make_client(cptr, STAT_UNKNOWN);
669 assert(0 != new_client);
671 cli_hopcount(new_client) = atoi(parv[2]);
672 cli_lastnick(new_client) = atoi(parv[3]);
673 if (Protocol(cptr) > 9 && parc > 7 && *parv[6] == '+')
675 for (p = parv[6] + 1; *p; p++)
677 for (i = 0; i < USERMODELIST_SIZE; ++i)
679 if (userModeList[i].c == *p)
681 SetFlag(new_client, userModeList[i].flag);
682 if (userModeList[i].flag == FLAG_ACCOUNT)
689 client_set_privs(new_client, NULL); /* set privs on user */
693 strcpy(cli_name(new_client), nick);
694 cli_user(new_client) = make_user(new_client);
695 cli_user(new_client)->server = sptr;
696 SetRemoteNumNick(new_client, parv[parc - 2]);
698 * IP# of remote client
700 cli_ip(new_client).s_addr = htonl(base64toint(parv[parc - 3]));
702 add_client_to_list(new_client);
703 hAddClient(new_client);
705 cli_serv(sptr)->ghost = 0; /* :server NICK means end of net.burst */
706 ircd_strncpy(cli_username(new_client), parv[4], USERLEN);
707 ircd_strncpy(cli_user(new_client)->host, parv[5], HOSTLEN);
708 ircd_strncpy(cli_user(new_client)->realhost, parv[5], HOSTLEN);
709 ircd_strncpy(cli_info(new_client), parv[parc - 1], REALLEN);
711 ircd_strncpy(cli_user(new_client)->account, account, ACCOUNTLEN);
712 if (HasHiddenHost(new_client))
713 ircd_snprintf(0, cli_user(new_client)->host, HOSTLEN, "%s.%s",
714 account, feature_str(FEAT_HIDDEN_HOST));
716 return register_user(cptr, new_client, cli_name(new_client), parv[4]);
718 else if ((cli_name(sptr))[0]) {
720 * Client changing its nick
722 * If the client belongs to me, then check to see
723 * if client is on any channels where it is currently
724 * banned. If so, do not allow the nick change to occur.
727 const char* channel_name;
728 struct Membership *member;
729 if ((channel_name = find_no_nickchange_channel(sptr))) {
730 return send_reply(cptr, ERR_BANNICKCHANGE, channel_name);
733 * Refuse nick change if the last nick change was less
734 * then 30 seconds ago. This is intended to get rid of
735 * clone bots doing NICK FLOOD. -SeKs
736 * If someone didn't change their nick for more then 60 seconds
737 * however, allow to do two nick changes immediately after another
738 * before limiting the nick flood. -Run
740 if (CurrentTime < cli_nextnick(cptr))
742 cli_nextnick(cptr) += 2;
743 send_reply(cptr, ERR_NICKTOOFAST, parv[1],
744 cli_nextnick(cptr) - CurrentTime);
745 /* Send error message */
746 sendcmdto_one(cptr, CMD_NICK, cptr, "%s", cli_name(cptr));
747 /* bounce NICK to user */
748 return 0; /* ignore nick change! */
751 /* Limit total to 1 change per NICK_DELAY seconds: */
752 cli_nextnick(cptr) += NICK_DELAY;
753 /* However allow _maximal_ 1 extra consecutive nick change: */
754 if (cli_nextnick(cptr) < CurrentTime)
755 cli_nextnick(cptr) = CurrentTime;
757 /* Invalidate all bans against the user so we check them again */
758 for (member = (cli_user(cptr))->channel; member;
759 member = member->next_channel)
760 ClearBanValid(member);
763 * Also set 'lastnick' to current time, if changed.
765 if (0 != ircd_strcmp(parv[0], nick))
766 cli_lastnick(sptr) = (sptr == cptr) ? TStime() : atoi(parv[2]);
769 * Client just changing his/her nick. If he/she is
770 * on a channel, send note of change to all clients
771 * on that channel. Propagate notice to other servers.
774 sendcmdto_common_channels_butone(sptr, CMD_NICK, NULL, ":%s", nick);
775 add_history(sptr, 1);
776 sendcmdto_serv_butone(sptr, CMD_NICK, cptr, "%s %Tu", nick,
780 sendcmdto_one(sptr, CMD_NICK, sptr, ":%s", nick);
782 if ((cli_name(sptr))[0])
784 strcpy(cli_name(sptr), nick);
788 /* Local client setting NICK the first time */
790 strcpy(cli_name(sptr), nick);
791 if (!cli_user(sptr)) {
792 cli_user(sptr) = make_user(sptr);
793 cli_user(sptr)->server = &me;
795 SetLocalNumNick(sptr);
799 * If the client hasn't gotten a cookie-ping yet,
800 * choose a cookie and send it. -record!jegelhof@cloud9.net
802 if (!cli_cookie(sptr)) {
804 cli_cookie(sptr) = (ircrandom() & 0x7fffffff);
805 } while (!cli_cookie(sptr));
806 sendrawto_one(cptr, MSG_PING " :%u", cli_cookie(sptr));
808 else if (*(cli_user(sptr))->host && cli_cookie(sptr) == COOKIE_VERIFIED) {
810 * USER and PONG already received, now we have NICK.
811 * register_user may reject the client and call exit_client
812 * for it - must test this and exit m_nick too !
814 cli_lastnick(sptr) = TStime(); /* Always local client */
815 if (register_user(cptr, sptr, nick, cli_user(sptr)->username) == CPTR_KILLED)
822 static unsigned char hash_target(unsigned int target)
824 return (unsigned char) (target >> 16) ^ (target >> 8);
830 * sptr must be a local client!
832 * Cannonifies target for client `sptr'.
835 add_target(struct Client *sptr, void *target)
837 /* Ok, this shouldn't work esp on alpha
839 unsigned char hash = hash_target((unsigned long) target);
840 unsigned char* targets;
843 assert(cli_local(sptr));
845 targets = cli_targets(sptr);
847 if (IsChannelName(cli_name(sptr)) && IsInvited(sptr, target))
852 for (i = 0; i < MAXTARGETS; ++i) {
853 if (targets[i] == hash)
859 memmove(&targets[RESERVEDTARGETS + 1],
860 &targets[RESERVEDTARGETS], MAXTARGETS - RESERVEDTARGETS - 1);
861 targets[RESERVEDTARGETS] = hash;
867 * sptr must be a local client !
869 * Returns 'true' (1) when too many targets are addressed.
870 * Returns 'false' (0) when it's ok to send to this target.
872 int check_target_limit(struct Client *sptr, void *target, const char *name,
875 unsigned char hash = hash_target((unsigned long) target);
877 unsigned char* targets;
880 assert(cli_local(sptr));
881 targets = cli_targets(sptr);
884 * Same target as last time?
886 if (targets[0] == hash)
888 for (i = 1; i < MAXTARGETS; ++i) {
889 if (targets[i] == hash) {
890 memmove(&targets[1], &targets[0], i);
899 if (CurrentTime < cli_nexttarget(sptr)) {
900 if (cli_nexttarget(sptr) - CurrentTime < TARGET_DELAY + 8) {
904 cli_nexttarget(sptr) += 2;
905 send_reply(sptr, ERR_TARGETTOOFAST, name,
906 cli_nexttarget(sptr) - CurrentTime);
911 cli_nexttarget(sptr) += TARGET_DELAY;
912 if (cli_nexttarget(sptr) < CurrentTime - (TARGET_DELAY * (MAXTARGETS - 1)))
913 cli_nexttarget(sptr) = CurrentTime - (TARGET_DELAY * (MAXTARGETS - 1));
916 memmove(&targets[1], &targets[0], MAXTARGETS - 1);
922 * whisper - called from m_cnotice and m_cprivmsg.
924 * parv[0] = sender prefix
927 * parv[3] = Private message text
929 * Added 971023 by Run.
930 * Reason: Allows channel operators to sent an arbitrary number of private
931 * messages to users on their channel, avoiding the max.targets limit.
932 * Building this into m_private would use too much cpu because we'd have
933 * to a cross channel lookup for every private message!
934 * Note that we can't allow non-chan ops to use this command, it would be
935 * abused by mass advertisers.
938 int whisper(struct Client* source, const char* nick, const char* channel,
939 const char* text, int is_notice)
942 struct Channel* chptr;
943 struct Membership* membership;
947 assert(0 != channel);
948 assert(MyUser(source));
950 if (!(dest = FindUser(nick))) {
951 return send_reply(source, ERR_NOSUCHNICK, nick);
953 if (!(chptr = FindChannel(channel))) {
954 return send_reply(source, ERR_NOSUCHCHANNEL, channel);
957 * compare both users channel lists, instead of the channels user list
958 * since the link is the same, this should be a little faster for channels
959 * with a lot of users
961 for (membership = cli_user(source)->channel; membership; membership = membership->next_channel) {
962 if (chptr == membership->channel)
965 if (0 == membership) {
966 return send_reply(source, ERR_NOTONCHANNEL, chptr->chname);
968 if (!IsVoicedOrOpped(membership)) {
969 return send_reply(source, ERR_VOICENEEDED, chptr->chname);
972 * lookup channel in destination
974 assert(0 != cli_user(dest));
975 for (membership = cli_user(dest)->channel; membership; membership = membership->next_channel) {
976 if (chptr == membership->channel)
979 if (0 == membership || IsZombie(membership)) {
980 return send_reply(source, ERR_USERNOTINCHANNEL, cli_name(dest), chptr->chname);
982 if (is_silenced(source, dest))
985 if (cli_user(dest)->away)
986 send_reply(source, RPL_AWAY, cli_name(dest), cli_user(dest)->away);
988 sendcmdto_one(source, CMD_NOTICE, dest, "%C :%s", dest, text);
990 sendcmdto_one(source, CMD_PRIVATE, dest, "%C :%s", dest, text);
996 * added Sat Jul 25 07:30:42 EST 1992
998 void send_umode_out(struct Client *cptr, struct Client *sptr,
999 struct Flags *old, int prop)
1002 struct Client *acptr;
1004 send_umode(NULL, sptr, old, prop ? SEND_UMODES : SEND_UMODES_BUT_OPER);
1006 for (i = HighestFd; i >= 0; i--)
1008 if ((acptr = LocalClientArray[i]) && IsServer(acptr) &&
1009 (acptr != cptr) && (acptr != sptr) && *umodeBuf)
1010 sendcmdto_one(sptr, CMD_MODE, acptr, "%s :%s", cli_name(sptr), umodeBuf);
1012 if (cptr && MyUser(cptr))
1013 send_umode(cptr, sptr, old, ALL_UMODES);
1018 * send_user_info - send user info userip/userhost
1019 * NOTE: formatter must put info into buffer and return a pointer to the end of
1020 * the data it put in the buffer.
1022 void send_user_info(struct Client* sptr, char* names, int rpl, InfoFormatter fmt)
1027 int users_found = 0;
1028 struct Client* acptr;
1035 mb = msgq_make(sptr, rpl_str(rpl), cli_name(&me), cli_name(sptr));
1037 for (name = ircd_strtok(&p, names, " "); name; name = ircd_strtok(&p, 0, " ")) {
1038 if ((acptr = FindUser(name))) {
1040 msgq_append(0, mb, " ");
1041 (*fmt)(acptr, sptr, mb);
1043 if (5 == ++arg_count)
1046 send_buffer(sptr, mb, 0);
1053 * If, after setting the flags, the user has both HiddenHost and Account
1054 * set, its hostmask is changed.
1057 hide_hostmask(struct Client *cptr, unsigned int flag)
1059 struct Membership *chan;
1061 if (MyConnect(cptr) && !feature_bool(FEAT_HOST_HIDING) &&
1062 flag == FLAG_HIDDENHOST)
1065 /* Invalidate all bans against the user so we check them again */
1066 for (chan = (cli_user(cptr))->channel; chan;
1067 chan = chan->next_channel)
1068 ClearBanValid(chan);
1070 SetFlag(cptr, flag);
1071 if (!HasFlag(cptr, FLAG_HIDDENHOST) || !HasFlag(cptr, FLAG_ACCOUNT))
1074 sendcmdto_common_channels_butone(cptr, CMD_QUIT, cptr, ":Registered");
1075 ircd_snprintf(0, cli_user(cptr)->host, HOSTLEN, "%s.%s",
1076 cli_user(cptr)->account, feature_str(FEAT_HIDDEN_HOST));
1078 /* ok, the client is now fully hidden, so let them know -- hikari */
1079 if (MyConnect(cptr))
1080 send_reply(cptr, RPL_HOSTHIDDEN, cli_user(cptr)->host);
1083 * Go through all channels the client was on, rejoin him
1084 * and set the modes, if any
1086 for (chan = cli_user(cptr)->channel; chan; chan = chan->next_channel)
1088 /* For a user with no modes in a join-delayed channel, do not show
1090 if (!IsChanOp(chan) && !HasVoice(chan)
1091 && (chan->channel->mode.mode & MODE_DELJOINS))
1092 SetDelayedJoin(chan);
1094 sendcmdto_channel_butserv_butone(cptr, CMD_JOIN, chan->channel, cptr,
1095 "%H", chan->channel);
1096 if (IsChanOp(chan) && HasVoice(chan))
1097 sendcmdto_channel_butserv_butone(&me, CMD_MODE, chan->channel, cptr,
1098 "%H +ov %C %C", chan->channel, cptr,
1100 else if (IsChanOp(chan) || HasVoice(chan))
1101 sendcmdto_channel_butserv_butone(&me, CMD_MODE, chan->channel, cptr,
1102 "%H +%c %C", chan->channel, IsChanOp(chan) ? 'o' : 'v', cptr);
1108 * set_user_mode() added 15/10/91 By Darren Reed.
1111 * parv[1] - username to change mode for
1112 * parv[2] - modes to change
1114 int set_user_mode(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
1118 struct Client *acptr;
1121 struct Flags setflags;
1122 unsigned int tmpmask = 0;
1123 int snomask_given = 0;
1126 int do_host_hiding = 0;
1131 return need_more_params(sptr, "MODE");
1133 if (!(acptr = FindUser(parv[1])))
1135 if (MyConnect(sptr))
1136 send_reply(sptr, ERR_NOSUCHCHANNEL, parv[1]);
1140 if (IsServer(sptr) || sptr != acptr)
1143 sendwallto_group_butone(&me, WALL_WALLOPS, 0,
1144 "MODE for User %s from %s!%s", parv[1],
1145 cli_name(cptr), cli_name(sptr));
1147 send_reply(sptr, ERR_USERSDONTMATCH);
1155 for (i = 0; i < USERMODELIST_SIZE; i++)
1157 if (HasFlag(sptr, userModeList[i].flag) &&
1158 userModeList[i].flag != FLAG_ACCOUNT)
1159 *m++ = userModeList[i].c;
1162 send_reply(sptr, RPL_UMODEIS, buf);
1163 if (HasFlag(sptr, FLAG_SERVNOTICE) && MyConnect(sptr)
1164 && cli_snomask(sptr) !=
1165 (unsigned int)(IsOper(sptr) ? SNO_OPERDEFAULT : SNO_DEFAULT))
1166 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
1171 * find flags already set for user
1172 * why not just copy them?
1174 setflags = cli_flags(sptr);
1176 if (MyConnect(sptr))
1177 tmpmask = cli_snomask(sptr);
1180 * parse mode change string(s)
1182 for (p = &parv[2]; *p; p++) { /* p is changed in loop too */
1183 for (m = *p; *m; m++) {
1192 if (*(p + 1) && is_snomask(*(p + 1))) {
1194 tmpmask = umode_make_snomask(tmpmask, *++p, what);
1195 tmpmask &= (IsAnOper(sptr) ? SNO_ALL : SNO_USER);
1198 tmpmask = (what == MODE_ADD) ?
1199 (IsAnOper(sptr) ? SNO_OPERDEFAULT : SNO_DEFAULT) : 0;
1201 SetServNotice(sptr);
1203 ClearServNotice(sptr);
1206 if (what == MODE_ADD)
1212 if (what == MODE_ADD)
1215 ClrFlag(sptr, FLAG_OPER);
1216 ClrFlag(sptr, FLAG_LOCOP);
1217 if (MyConnect(sptr))
1219 tmpmask = cli_snomask(sptr) & ~SNO_OPER;
1220 cli_handler(sptr) = CLIENT_HANDLER;
1225 if (what == MODE_ADD)
1229 ClrFlag(sptr, FLAG_OPER);
1230 ClrFlag(sptr, FLAG_LOCOP);
1231 if (MyConnect(sptr))
1233 tmpmask = cli_snomask(sptr) & ~SNO_OPER;
1234 cli_handler(sptr) = CLIENT_HANDLER;
1239 if (what == MODE_ADD)
1242 ClearInvisible(sptr);
1245 if (what == MODE_ADD)
1251 if (what == MODE_ADD)
1252 SetChannelService(sptr);
1254 ClearChannelService(sptr);
1257 if (what == MODE_ADD)
1263 if (what == MODE_ADD)
1272 * Evaluate rules for new user mode
1273 * Stop users making themselves operators too easily:
1275 if (!IsServer(cptr))
1277 if (!FlagHas(&setflags, FLAG_OPER) && IsOper(sptr))
1279 if (!FlagHas(&setflags, FLAG_LOCOP) && IsLocOp(sptr))
1282 * new umode; servers can set it, local users cannot;
1283 * prevents users from /kick'ing or /mode -o'ing
1285 if (!FlagHas(&setflags, FLAG_CHSERV))
1286 ClearChannelService(sptr);
1288 * only send wallops to opers
1290 if (feature_bool(FEAT_WALLOPS_OPER_ONLY) && !IsAnOper(sptr) &&
1291 !FlagHas(&setflags, FLAG_WALLOP))
1293 if (feature_bool(FEAT_HIS_SNOTICES_OPER_ONLY) && MyConnect(sptr) &&
1294 !IsAnOper(sptr) && !FlagHas(&setflags, FLAG_SERVNOTICE))
1296 ClearServNotice(sptr);
1297 set_snomask(sptr, 0, SNO_SET);
1299 if (feature_bool(FEAT_HIS_DEBUG_OPER_ONLY) &&
1300 !IsAnOper(sptr) && !FlagHas(&setflags, FLAG_DEBUG))
1303 if (MyConnect(sptr))
1305 if ((FlagHas(&setflags, FLAG_OPER) || FlagHas(&setflags, FLAG_LOCOP)) &&
1307 det_confs_butmask(sptr, CONF_CLIENT & ~CONF_OPS);
1309 if (SendServNotice(sptr))
1311 if (tmpmask != cli_snomask(sptr))
1312 set_snomask(sptr, tmpmask, SNO_SET);
1313 if (cli_snomask(sptr) && snomask_given)
1314 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
1317 set_snomask(sptr, 0, SNO_SET);
1320 * Compare new flags with old flags and send string which
1321 * will cause servers to update correctly.
1323 if (!FlagHas(&setflags, FLAG_OPER) && IsOper(sptr))
1327 client_set_privs(sptr, NULL); /* may set propagate privilege */
1329 /* remember propagate privilege setting */
1330 if (HasPriv(sptr, PRIV_PROPAGATE))
1332 if (FlagHas(&setflags, FLAG_OPER) && !IsOper(sptr))
1334 /* user no longer oper */
1336 client_set_privs(sptr, NULL); /* will clear propagate privilege */
1338 if (FlagHas(&setflags, FLAG_INVISIBLE) && !IsInvisible(sptr))
1339 --UserStats.inv_clients;
1340 if (!FlagHas(&setflags, FLAG_INVISIBLE) && IsInvisible(sptr))
1341 ++UserStats.inv_clients;
1342 if (!FlagHas(&setflags, FLAG_HIDDENHOST) && do_host_hiding)
1343 hide_hostmask(sptr, FLAG_HIDDENHOST);
1344 send_umode_out(cptr, sptr, &setflags, prop);
1350 * Build umode string for BURST command
1353 char *umode_str(struct Client *cptr)
1355 /* Maximum string size: "owidgrx\0" */
1358 struct Flags c_flags = cli_flags(cptr);
1360 if (HasPriv(cptr, PRIV_PROPAGATE))
1361 FlagSet(&c_flags, FLAG_OPER);
1363 FlagClr(&c_flags, FLAG_OPER);
1365 for (i = 0; i < USERMODELIST_SIZE; ++i)
1367 if (FlagHas(&c_flags, userModeList[i].flag) &&
1368 userModeList[i].flag >= FLAG_GLOBAL_UMODES)
1369 *m++ = userModeList[i].c;
1372 if (IsAccount(cptr))
1374 char* t = cli_user(cptr)->account;
1377 while ((*m++ = *t++))
1383 return umodeBuf; /* Note: static buffer, gets
1384 overwritten by send_umode() */
1388 * Send the MODE string for user (user) to connection cptr
1391 void send_umode(struct Client *cptr, struct Client *sptr, struct Flags *old,
1397 int what = MODE_NULL;
1400 * Build a string in umodeBuf to represent the change in the user's
1401 * mode between the new (cli_flags(sptr)) and 'old', but skipping
1402 * the modes indicated by sendset.
1406 for (i = 0; i < USERMODELIST_SIZE; ++i)
1408 flag = userModeList[i].flag;
1409 if (FlagHas(old, flag)
1410 == HasFlag(sptr, flag))
1416 case SEND_UMODES_BUT_OPER:
1417 if (flag == FLAG_OPER)
1419 /* and fall through */
1421 if (flag < FLAG_GLOBAL_UMODES)
1425 if (FlagHas(old, flag))
1427 if (what == MODE_DEL)
1428 *m++ = userModeList[i].c;
1433 *m++ = userModeList[i].c;
1436 else /* !FlagHas(old, flag) */
1438 if (what == MODE_ADD)
1439 *m++ = userModeList[i].c;
1444 *m++ = userModeList[i].c;
1449 if (*umodeBuf && cptr)
1450 sendcmdto_one(sptr, CMD_MODE, cptr, "%s :%s", cli_name(sptr), umodeBuf);
1454 * Check to see if this resembles a sno_mask. It is if 1) there is
1455 * at least one digit and 2) The first digit occurs before the first
1456 * alphabetic character.
1458 int is_snomask(char *word)
1462 for (; *word; word++)
1465 else if (IsAlpha(*word))
1472 * If it begins with a +, count this as an additive mask instead of just
1473 * a replacement. If what == MODE_DEL, "+" has no special effect.
1475 unsigned int umode_make_snomask(unsigned int oldmask, char *arg, int what)
1477 unsigned int sno_what;
1478 unsigned int newmask;
1482 if (what == MODE_ADD)
1487 else if (*arg == '-')
1490 if (what == MODE_ADD)
1496 sno_what = (what == MODE_ADD) ? SNO_SET : SNO_DEL;
1497 /* pity we don't have strtoul everywhere */
1498 newmask = (unsigned int)atoi(arg);
1499 if (sno_what == SNO_DEL)
1500 newmask = oldmask & ~newmask;
1501 else if (sno_what == SNO_ADD)
1506 static void delfrom_list(struct Client *cptr, struct SLink **list)
1509 struct SLink* prv = NULL;
1511 for (tmp = *list; tmp; tmp = tmp->next) {
1512 if (tmp->value.cptr == cptr) {
1514 prv->next = tmp->next;
1525 * This function sets a Client's server notices mask, according to
1526 * the parameter 'what'. This could be even faster, but the code
1527 * gets mighty hard to read :)
1529 void set_snomask(struct Client *cptr, unsigned int newmask, int what)
1531 unsigned int oldmask, diffmask; /* unsigned please */
1535 oldmask = cli_snomask(cptr);
1537 if (what == SNO_ADD)
1539 else if (what == SNO_DEL)
1540 newmask = oldmask & ~newmask;
1541 else if (what != SNO_SET) /* absolute set, no math needed */
1542 sendto_opmask_butone(0, SNO_OLDSNO, "setsnomask called with %d ?!", what);
1544 newmask &= (IsAnOper(cptr) ? SNO_ALL : SNO_USER);
1546 diffmask = oldmask ^ newmask;
1548 for (i = 0; diffmask >> i; i++) {
1549 if (((diffmask >> i) & 1))
1551 if (((newmask >> i) & 1))
1554 tmp->next = opsarray[i];
1555 tmp->value.cptr = cptr;
1559 /* not real portable :( */
1560 delfrom_list(cptr, &opsarray[i]);
1563 cli_snomask(cptr) = newmask;
1567 * is_silenced : Does the actual check wether sptr is allowed
1568 * to send a message to acptr.
1569 * Both must be registered persons.
1570 * If sptr is silenced by acptr, his message should not be propagated,
1571 * but more over, if this is detected on a server not local to sptr
1572 * the SILENCE mask is sent upstream.
1574 int is_silenced(struct Client *sptr, struct Client *acptr)
1578 static char sender[HOSTLEN + NICKLEN + USERLEN + 5];
1579 static char senderip[16 + NICKLEN + USERLEN + 5];
1580 static char senderh[HOSTLEN + ACCOUNTLEN + USERLEN + 6];
1582 if (!cli_user(acptr) || !(lp = cli_user(acptr)->silence) || !(user = cli_user(sptr)))
1584 ircd_snprintf(0, sender, sizeof(sender), "%s!%s@%s", cli_name(sptr),
1585 user->username, user->host);
1586 ircd_snprintf(0, senderip, sizeof(senderip), "%s!%s@%s", cli_name(sptr),
1587 user->username, ircd_ntoa((const char*) &(cli_ip(sptr))));
1588 if (HasHiddenHost(sptr))
1589 ircd_snprintf(0, senderh, sizeof(senderh), "%s!%s@%s", cli_name(sptr),
1590 user->username, user->realhost);
1591 for (; lp; lp = lp->next)
1593 if ((!(lp->flags & CHFL_SILENCE_IPMASK) && (!match(lp->value.cp, sender) ||
1594 (HasHiddenHost(sptr) && !match(lp->value.cp, senderh)))) ||
1595 ((lp->flags & CHFL_SILENCE_IPMASK) && !match(lp->value.cp, senderip)))
1597 if (!MyConnect(sptr))
1599 sendcmdto_one(acptr, CMD_SILENCE, cli_from(sptr), "%C %s", sptr,
1611 * Removes all silence masks from the list of sptr that fall within `mask'
1612 * Returns -1 if none where found, 0 otherwise.
1614 int del_silence(struct Client *sptr, char *mask)
1620 for (lp = &(cli_user(sptr))->silence; *lp;) {
1621 if (!mmatch(mask, (*lp)->value.cp))
1625 MyFree(tmp->value.cp);
1635 int add_silence(struct Client* sptr, const char* mask)
1637 struct SLink *lp, **lpp;
1638 int cnt = 0, len = strlen(mask);
1641 for (lpp = &(cli_user(sptr))->silence, lp = *lpp; lp;)
1643 if (0 == ircd_strcmp(mask, lp->value.cp))
1645 if (!mmatch(mask, lp->value.cp))
1647 struct SLink *tmp = lp;
1648 *lpp = lp = lp->next;
1649 MyFree(tmp->value.cp);
1655 len += strlen(lp->value.cp);
1656 if ((len > (feature_int(FEAT_AVBANLEN) * feature_int(FEAT_MAXSILES))) ||
1657 (++cnt >= feature_int(FEAT_MAXSILES)))
1659 send_reply(sptr, ERR_SILELISTFULL, mask);
1662 else if (!mmatch(lp->value.cp, mask))
1669 memset(lp, 0, sizeof(struct SLink));
1670 lp->next = cli_user(sptr)->silence;
1671 lp->value.cp = (char*) MyMalloc(strlen(mask) + 1);
1672 assert(0 != lp->value.cp);
1673 strcpy(lp->value.cp, mask);
1674 if ((ip_start = strrchr(mask, '@')) && check_if_ipmask(ip_start + 1))
1675 lp->flags = CHFL_SILENCE_IPMASK;
1676 cli_user(sptr)->silence = lp;
1681 send_supported(struct Client *cptr)
1683 char featurebuf[512];
1685 ircd_snprintf(0, featurebuf, sizeof(featurebuf), FEATURES1, FEATURESVALUES1);
1686 send_reply(cptr, RPL_ISUPPORT, featurebuf);
1687 ircd_snprintf(0, featurebuf, sizeof(featurebuf), FEATURES2, FEATURESVALUES2);
1688 send_reply(cptr, RPL_ISUPPORT, featurebuf);
1690 return 0; /* convenience return, if it's ever needed */