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
181 * parv[server] is replaced with the pointer to the
182 * real servername from the matched client (I'm lazy
185 * returns: (see #defines)
187 int hunt_server_cmd(struct Client *from, const char *cmd, const char *tok,
188 struct Client *one, int MustBeOper, const char *pattern,
189 int server, int parc, char *parv[])
191 struct Client *acptr;
194 /* Assume it's me, if no server or an unregistered client */
195 if (parc <= server || EmptyString((to = parv[server])) || IsUnknown(from))
196 return (HUNTED_ISME);
198 /* Make sure it's a server */
200 /* Make sure it's a server */
201 if (!strchr(to, '*')) {
202 if (0 == (acptr = FindClient(to)))
203 return HUNTED_NOSUCH;
206 acptr = cli_user(acptr)->server;
207 } else if (!(acptr = find_match_server(to))) {
208 send_reply(from, ERR_NOSUCHSERVER, to);
209 return (HUNTED_NOSUCH);
211 } else if (!(acptr = FindNServer(to)))
212 return (HUNTED_NOSUCH); /* Server broke off in the meantime */
215 return (HUNTED_ISME);
217 if (MustBeOper && !IsPrivileged(from)) {
218 send_reply(from, ERR_NOPRIVILEGES);
219 return HUNTED_NOSUCH;
222 assert(!IsServer(from));
224 parv[server] = (char *) acptr; /* HACK! HACK! HACK! ARGH! */
226 sendcmdto_one(from, cmd, tok, acptr, pattern, parv[1], parv[2], parv[3],
227 parv[4], parv[5], parv[6], parv[7], parv[8]);
229 return (HUNTED_PASS);
232 int hunt_server_prio_cmd(struct Client *from, const char *cmd, const char *tok,
233 struct Client *one, int MustBeOper,
234 const char *pattern, int server, int parc,
237 struct Client *acptr;
240 /* Assume it's me, if no server or an unregistered client */
241 if (parc <= server || EmptyString((to = parv[server])) || IsUnknown(from))
242 return (HUNTED_ISME);
244 /* Make sure it's a server */
246 /* Make sure it's a server */
247 if (!strchr(to, '*')) {
248 if (0 == (acptr = FindClient(to)))
249 return HUNTED_NOSUCH;
252 acptr = cli_user(acptr)->server;
253 } else if (!(acptr = find_match_server(to))) {
254 send_reply(from, ERR_NOSUCHSERVER, to);
255 return (HUNTED_NOSUCH);
257 } else if (!(acptr = FindNServer(to)))
258 return (HUNTED_NOSUCH); /* Server broke off in the meantime */
261 return (HUNTED_ISME);
263 if (MustBeOper && !IsPrivileged(from)) {
264 send_reply(from, ERR_NOPRIVILEGES);
265 return HUNTED_NOSUCH;
268 assert(!IsServer(from));
270 parv[server] = (char *) acptr; /* HACK! HACK! HACK! ARGH! */
272 sendcmdto_prio_one(from, cmd, tok, acptr, pattern, parv[1], parv[2], parv[3],
273 parv[4], parv[5], parv[6], parv[7], parv[8]);
275 return (HUNTED_PASS);
279 * 'do_nick_name' ensures that the given parameter (nick) is really a proper
280 * string for a nickname (note, the 'nick' may be modified in the process...)
282 * RETURNS the length of the final NICKNAME (0, if nickname is invalid)
284 * Nickname characters are in range 'A'..'}', '_', '-', '0'..'9'
285 * anything outside the above set will terminate nickname.
286 * In addition, the first character cannot be '-' or a Digit.
289 * The '~'-character should be allowed, but a change should be global,
290 * some confusion would result if only few servers allowed it...
292 int do_nick_name(char* nick)
295 char* end = ch + NICKLEN;
298 if (*ch == '-' || IsDigit(*ch)) /* first character in [0..9-] */
301 for ( ; (ch < end) && *ch; ++ch)
302 if (!IsNickChar(*ch))
313 * Copy `source' to `dest', replacing all occurances of '~' and characters that
314 * are not `isIrcUi' by an underscore.
315 * Copies at most USERLEN - 1 characters or up till the first control character.
316 * If `tilde' is true, then a tilde is prepended to `dest'.
317 * Note that `dest' and `source' can point to the same area or to different
318 * non-overlapping areas.
320 static char *clean_user_id(char *dest, char *source, int tilde)
327 ch = *s++; /* Store first character to copy: */
330 *d++ = '~'; /* If `dest' == `source', then this overwrites `ch' */
333 while (ch && !IsCntrl(ch) && rlen--)
335 char nch = *s++; /* Store next character to copy */
336 *d++ = IsUserChar(ch) ? ch : '_'; /* This possibly overwrites it */
349 * This function is called when both NICK and USER messages
350 * have been accepted for the client, in whatever order. Only
351 * after this the USER message is propagated.
353 * NICK's must be propagated at once when received, although
354 * it would be better to delay them too until full info is
355 * available. Doing it is not so simple though, would have
356 * to implement the following:
358 * 1) user telnets in and gives only "NICK foobar" and waits
359 * 2) another user far away logs in normally with the nick
360 * "foobar" (quite legal, as this server didn't propagate it).
361 * 3) now this server gets nick "foobar" from outside, but
362 * has already the same defined locally. Current server
363 * would just issue "KILL foobar" to clean out dups. But,
364 * this is not fair. It should actually request another
365 * nick from local user or kill him/her...
367 int register_user(struct Client *cptr, struct Client *sptr,
368 const char *nick, char *username)
370 struct ConfItem* aconf;
374 char c = 0; /* not alphanum */
375 char d = 'a'; /* not a digit */
383 short digitgroups = 0;
384 struct User* user = cli_user(sptr);
387 user->last = CurrentTime;
388 parv[0] = cli_name(sptr);
389 parv[1] = parv[2] = NULL;
393 static time_t last_too_many1;
394 static time_t last_too_many2;
396 assert(cptr == sptr);
397 switch (conf_check_client(sptr))
401 case ACR_NO_AUTHORIZATION:
402 sendto_opmask_butone(0, SNO_UNAUTH, "Unauthorized connection from %s.",
403 get_client_name(sptr, HIDE_IP));
404 ++ServerStats->is_ref;
405 return exit_client(cptr, sptr, &me,
406 "No Authorization - use another server");
407 case ACR_TOO_MANY_IN_CLASS:
408 if (CurrentTime - last_too_many1 >= (time_t) 60)
410 last_too_many1 = CurrentTime;
411 sendto_opmask_butone(0, SNO_TOOMANY, "Too many connections in "
412 "class %i for %s.", get_client_class(sptr),
413 get_client_name(sptr, SHOW_IP));
415 ++ServerStats->is_ref;
416 IPcheck_connect_fail(cli_ip(sptr));
417 return exit_client(cptr, sptr, &me,
418 "Sorry, your connection class is full - try "
419 "again later or try another server");
420 case ACR_TOO_MANY_FROM_IP:
421 if (CurrentTime - last_too_many2 >= (time_t) 60)
423 last_too_many2 = CurrentTime;
424 sendto_opmask_butone(0, SNO_TOOMANY, "Too many connections from "
426 get_client_name(sptr, SHOW_IP));
428 ++ServerStats->is_ref;
429 return exit_client(cptr, sptr, &me,
430 "Too many connections from your host");
431 case ACR_ALREADY_AUTHORIZED:
432 /* Can this ever happen? */
434 ++ServerStats->is_ref;
435 IPcheck_connect_fail(cli_ip(sptr));
436 return exit_client(cptr, sptr, &me, "Unknown error -- Try again");
438 ircd_strncpy(user->host, cli_sockhost(sptr), HOSTLEN);
439 aconf = cli_confs(sptr)->value.aconf;
441 clean_user_id(user->username,
442 (cli_flags(sptr) & FLAGS_GOTID) ? cli_username(sptr) : username,
443 (cli_flags(sptr) & FLAGS_DOID) && !(cli_flags(sptr) & FLAGS_GOTID));
445 if ((user->username[0] == '\0')
446 || ((user->username[0] == '~') && (user->username[1] == '\000')))
447 return exit_client(cptr, sptr, &me, "USER: Bogus userid.");
449 if (!EmptyString(aconf->passwd)
450 && !(IsDigit(*aconf->passwd) && !aconf->passwd[1])
451 && strcmp(cli_passwd(sptr), aconf->passwd))
453 ServerStats->is_ref++;
454 IPcheck_connect_fail(cli_ip(sptr));
455 send_reply(sptr, ERR_PASSWDMISMATCH);
456 return exit_client(cptr, sptr, &me, "Bad Password");
458 memset(cli_passwd(sptr), 0, sizeof(cli_passwd(sptr)));
460 * following block for the benefit of time-dependent K:-lines
462 if (find_kill(sptr)) {
463 ServerStats->is_ref++;
464 IPcheck_connect_fail(cli_ip(sptr));
465 return exit_client(cptr, sptr, &me, "K-lined");
468 * Check for mixed case usernames, meaning probably hacked. Jon2 3-94
469 * Summary of rules now implemented in this patch: Ensor 11-94
470 * In a mixed-case name, if first char is upper, one more upper may
471 * appear anywhere. (A mixed-case name *must* have an upper first
472 * char, and may have one other upper.)
473 * A third upper may appear if all 3 appear at the beginning of the
474 * name, separated only by "others" (-/_/.).
475 * A single group of digits is allowed anywhere.
476 * Two groups of digits are allowed if at least one of the groups is
477 * at the beginning or the end.
478 * Only one '-', '_', or '.' is allowed (or two, if not consecutive).
479 * But not as the first or last char.
480 * No other special characters are allowed.
481 * Name must contain at least one letter.
483 tmpstr2 = tmpstr = (username[0] == '~' ? &username[1] : username);
484 while (*tmpstr && !badid)
496 if ((leadcaps || pos == 1) && !lower && !digits)
502 if (pos == 1 || !IsDigit(d))
509 else if (c == '-' || c == '_' || c == '.')
514 else if (d == '-' || d == '_' || d == '.' || other > 2)
523 if (lower && upper && (!leadcaps || leadcaps > 3 ||
524 (upper > 2 && upper > leadcaps)))
526 else if (digitgroups == 2 && !(IsDigit(tmpstr2[0]) || IsDigit(c)))
528 else if ((!lower && !upper) || !IsAlnum(c))
531 if (badid && (!(cli_flags(sptr) & FLAGS_GOTID) ||
532 strcmp(cli_username(sptr), username) != 0))
534 ServerStats->is_ref++;
536 send_reply(cptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
537 ":Your username is invalid.");
538 send_reply(cptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
539 ":Connect with your real username, in lowercase.");
540 send_reply(cptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
541 ":If your mail address were foo@bar.com, your username "
543 return exit_client(cptr, sptr, &me, "USER: Bad username");
545 Count_unknownbecomesclient(sptr, UserStats);
548 ircd_strncpy(user->username, username, USERLEN);
549 Count_newremoteclient(UserStats, user->server);
553 if (IsInvisible(sptr))
554 ++UserStats.inv_clients;
558 if (MyConnect(sptr)) {
559 cli_handler(sptr) = CLIENT_HANDLER;
560 release_dns_reply(sptr);
562 send_reply(sptr, RPL_WELCOME, nick);
564 * This is a duplicate of the NOTICE but see below...
566 send_reply(sptr, RPL_YOURHOST, cli_name(&me), version);
567 send_reply(sptr, RPL_CREATED, creation);
568 send_reply(sptr, RPL_MYINFO, cli_name(&me), version);
569 send_supported(sptr);
570 m_lusers(sptr, sptr, 1, parv);
573 /* nextping = CurrentTime; */
574 if (cli_snomask(sptr) & SNO_NOISY)
575 set_snomask(sptr, cli_snomask(sptr) & SNO_NOISY, SNO_ADD);
576 IPcheck_connect_succeeded(sptr);
579 /* if (IsServer(cptr)) */
581 struct Client *acptr;
583 acptr = user->server;
584 if (cli_from(acptr) != cli_from(sptr))
586 sendcmdto_one(&me, CMD_KILL, cptr, "%C :%s (%s != %s[%s])",
587 sptr, cli_name(&me), cli_name(user->server), cli_name(cli_from(acptr)),
588 cli_sockhost(cli_from(acptr)));
589 cli_flags(sptr) |= FLAGS_KILLED;
590 return exit_client(cptr, sptr, &me, "NICK server wrong direction");
593 cli_flags(sptr) |= (cli_flags(acptr) & FLAGS_TS8);
596 * Check to see if this user is being propogated
597 * as part of a net.burst, or is using protocol 9.
598 * FIXME: This can be speeded up - its stupid to check it for
599 * every NICK message in a burst again --Run.
601 for (acptr = user->server; acptr != &me; acptr = cli_serv(acptr)->up) {
602 if (IsBurst(acptr) || Protocol(acptr) < 10)
605 if (!IPcheck_remote_connect(sptr, (acptr != &me))) {
607 * We ran out of bits to count this
609 sendcmdto_one(&me, CMD_KILL, sptr, "%C :%s (Too many connections from your host -- Ghost)",
610 sptr, cli_name(&me));
611 return exit_client(cptr, sptr, &me,"Too many connections from your host -- throttled");
614 tmpstr = umode_str(sptr);
615 sendcmdto_serv_butone(user->server, CMD_NICK, cptr,
616 "%s %d %Tu %s %s %s%s%s%s %s%s :%s",
617 nick, cli_hopcount(sptr) + 1, cli_lastnick(sptr),
618 user->username, user->host,
619 *tmpstr ? "+" : "", tmpstr, *tmpstr ? " " : "",
620 inttobase64(ip_base64, ntohl(cli_ip(sptr).s_addr), 6),
621 NumNick(sptr), cli_info(sptr));
623 /* Send umode to client */
626 send_umode(cptr, sptr, 0, ALL_UMODES);
627 if (cli_snomask(sptr) != SNO_DEFAULT && (cli_flags(sptr) & FLAGS_SERVNOTICE))
628 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
635 static const struct UserMode {
640 { FLAGS_LOCOP, 'O' },
641 { FLAGS_INVISIBLE, 'i' },
642 { FLAGS_WALLOP, 'w' },
643 { FLAGS_SERVNOTICE, 's' },
645 { FLAGS_CHSERV, 'k' },
649 #define USERMODELIST_SIZE sizeof(userModeList) / sizeof(struct UserMode)
652 * XXX - find a way to get rid of this
654 static char umodeBuf[BUFSIZE];
656 int set_nick_name(struct Client* cptr, struct Client* sptr,
657 const char* nick, int parc, char* parv[])
659 if (IsServer(sptr)) {
664 * A server introducing a new client, change source
666 struct Client* new_client = make_client(cptr, STAT_UNKNOWN);
667 assert(0 != new_client);
669 cli_hopcount(new_client) = atoi(parv[2]);
670 cli_lastnick(new_client) = atoi(parv[3]);
671 if (Protocol(cptr) > 9 && parc > 7 && *parv[6] == '+') {
672 for (p = parv[6] + 1; *p; p++) {
673 for (i = 0; i < USERMODELIST_SIZE; ++i) {
674 if (userModeList[i].c == *p) {
675 cli_flags(new_client) |= userModeList[i].flag;
681 client_set_privs(new_client); /* set privs on user */
685 strcpy(cli_name(new_client), nick);
686 cli_user(new_client) = make_user(new_client);
687 cli_user(new_client)->server = sptr;
688 SetRemoteNumNick(new_client, parv[parc - 2]);
690 * IP# of remote client
692 cli_ip(new_client).s_addr = htonl(base64toint(parv[parc - 3]));
694 add_client_to_list(new_client);
695 hAddClient(new_client);
697 cli_serv(sptr)->ghost = 0; /* :server NICK means end of net.burst */
698 ircd_strncpy(cli_username(new_client), parv[4], USERLEN);
699 ircd_strncpy(cli_user(new_client)->host, parv[5], HOSTLEN);
700 ircd_strncpy(cli_info(new_client), parv[parc - 1], REALLEN);
702 return register_user(cptr, new_client, cli_name(new_client), parv[4]);
704 else if ((cli_name(sptr))[0]) {
706 * Client changing its nick
708 * If the client belongs to me, then check to see
709 * if client is on any channels where it is currently
710 * banned. If so, do not allow the nick change to occur.
713 const char* channel_name;
714 if ((channel_name = find_no_nickchange_channel(sptr))) {
715 return send_reply(cptr, ERR_BANNICKCHANGE, channel_name);
718 * Refuse nick change if the last nick change was less
719 * then 30 seconds ago. This is intended to get rid of
720 * clone bots doing NICK FLOOD. -SeKs
721 * If someone didn't change their nick for more then 60 seconds
722 * however, allow to do two nick changes immedately after another
723 * before limiting the nick flood. -Run
725 if (CurrentTime < cli_nextnick(cptr)) {
726 cli_nextnick(cptr) += 2;
727 send_reply(cptr, ERR_NICKTOOFAST, parv[1],
728 cli_nextnick(cptr) - CurrentTime);
729 /* Send error message */
730 sendcmdto_one(cptr, CMD_NICK, cptr, "%s", cli_name(cptr));
731 /* bounce NICK to user */
732 return 0; /* ignore nick change! */
735 /* Limit total to 1 change per NICK_DELAY seconds: */
736 cli_nextnick(cptr) += NICK_DELAY;
737 /* However allow _maximal_ 1 extra consecutive nick change: */
738 if (cli_nextnick(cptr) < CurrentTime)
739 cli_nextnick(cptr) = CurrentTime;
743 * Also set 'lastnick' to current time, if changed.
745 if (0 != ircd_strcmp(parv[0], nick))
746 cli_lastnick(sptr) = (sptr == cptr) ? TStime() : atoi(parv[2]);
749 * Client just changing his/her nick. If he/she is
750 * on a channel, send note of change to all clients
751 * on that channel. Propagate notice to other servers.
754 sendcmdto_common_channels(sptr, CMD_NICK, ":%s", nick);
755 add_history(sptr, 1);
756 sendcmdto_serv_butone(sptr, CMD_NICK, cptr, "%s %Tu", nick,
760 sendcmdto_one(sptr, CMD_NICK, sptr, ":%s", nick);
762 if ((cli_name(sptr))[0])
764 strcpy(cli_name(sptr), nick);
768 /* Local client setting NICK the first time */
770 strcpy(cli_name(sptr), nick);
771 if (!cli_user(sptr)) {
772 cli_user(sptr) = make_user(sptr);
773 cli_user(sptr)->server = &me;
775 SetLocalNumNick(sptr);
779 * If the client hasn't gotten a cookie-ping yet,
780 * choose a cookie and send it. -record!jegelhof@cloud9.net
782 if (!cli_cookie(sptr)) {
784 cli_cookie(sptr) = (ircrandom() & 0x7fffffff);
785 } while (!cli_cookie(sptr));
786 sendrawto_one(cptr, MSG_PING " :%u", cli_cookie(sptr));
788 else if (*(cli_user(sptr))->host && cli_cookie(sptr) == COOKIE_VERIFIED) {
790 * USER and PONG already received, now we have NICK.
791 * register_user may reject the client and call exit_client
792 * for it - must test this and exit m_nick too !
794 cli_lastnick(sptr) = TStime(); /* Always local client */
795 if (register_user(cptr, sptr, nick, cli_user(sptr)->username) == CPTR_KILLED)
802 static unsigned char hash_target(unsigned int target)
804 return (unsigned char) (target >> 16) ^ (target >> 8);
810 * sptr must be a local client!
812 * Cannonifies target for client `sptr'.
814 void add_target(struct Client *sptr, void *target)
816 /* Ok, this shouldn't work esp on alpha
818 unsigned char hash = hash_target((unsigned long) target);
819 unsigned char* targets;
822 assert(cli_local(sptr));
824 targets = cli_targets(sptr);
828 for (i = 0; i < MAXTARGETS; ++i) {
829 if (targets[i] == hash)
835 memmove(&targets[RESERVEDTARGETS + 1],
836 &targets[RESERVEDTARGETS], MAXTARGETS - RESERVEDTARGETS - 1);
837 targets[RESERVEDTARGETS] = hash;
843 * sptr must be a local client !
845 * Returns 'true' (1) when too many targets are addressed.
846 * Returns 'false' (0) when it's ok to send to this target.
848 int check_target_limit(struct Client *sptr, void *target, const char *name,
851 unsigned char hash = hash_target((unsigned long) target);
853 unsigned char* targets;
856 assert(cli_local(sptr));
857 targets = cli_targets(sptr);
860 * Same target as last time?
862 if (targets[0] == hash)
864 for (i = 1; i < MAXTARGETS; ++i) {
865 if (targets[i] == hash) {
866 memmove(&targets[1], &targets[0], i);
875 if (CurrentTime < cli_nexttarget(sptr)) {
876 if (cli_nexttarget(sptr) - CurrentTime < TARGET_DELAY + 8) {
880 cli_nexttarget(sptr) += 2;
881 send_reply(sptr, ERR_TARGETTOOFAST, name,
882 cli_nexttarget(sptr) - CurrentTime);
887 cli_nexttarget(sptr) += TARGET_DELAY;
888 if (cli_nexttarget(sptr) < CurrentTime - (TARGET_DELAY * (MAXTARGETS - 1)))
889 cli_nexttarget(sptr) = CurrentTime - (TARGET_DELAY * (MAXTARGETS - 1));
892 memmove(&targets[1], &targets[0], MAXTARGETS - 1);
898 * whisper - called from m_cnotice and m_cprivmsg.
900 * parv[0] = sender prefix
903 * parv[3] = Private message text
905 * Added 971023 by Run.
906 * Reason: Allows channel operators to sent an arbitrary number of private
907 * messages to users on their channel, avoiding the max.targets limit.
908 * Building this into m_private would use too much cpu because we'd have
909 * to a cross channel lookup for every private message!
910 * Note that we can't allow non-chan ops to use this command, it would be
911 * abused by mass advertisers.
914 int whisper(struct Client* source, const char* nick, const char* channel,
915 const char* text, int is_notice)
918 struct Channel* chptr;
919 struct Membership* membership;
923 assert(0 != channel);
924 assert(MyUser(source));
926 if (!(dest = FindUser(nick))) {
927 return send_reply(source, ERR_NOSUCHNICK, nick);
929 if (!(chptr = FindChannel(channel))) {
930 return send_reply(source, ERR_NOSUCHCHANNEL, channel);
933 * compare both users channel lists, instead of the channels user list
934 * since the link is the same, this should be a little faster for channels
935 * with a lot of users
937 for (membership = cli_user(source)->channel; membership; membership = membership->next_channel) {
938 if (chptr == membership->channel)
941 if (0 == membership) {
942 return send_reply(source, ERR_NOTONCHANNEL, chptr->chname);
944 if (!IsVoicedOrOpped(membership)) {
945 return send_reply(source, ERR_VOICENEEDED, chptr->chname);
948 * lookup channel in destination
950 assert(0 != cli_user(dest));
951 for (membership = cli_user(dest)->channel; membership; membership = membership->next_channel) {
952 if (chptr == membership->channel)
955 if (0 == membership || IsZombie(membership)) {
956 return send_reply(source, ERR_USERNOTINCHANNEL, cli_name(dest), chptr->chname);
958 if (is_silenced(source, dest))
961 if (cli_user(dest)->away)
962 send_reply(source, RPL_AWAY, cli_name(dest), cli_user(dest)->away);
964 sendcmdto_one(source, CMD_NOTICE, dest, "%C :%s", dest, text);
966 sendcmdto_one(source, CMD_PRIVATE, dest, "%C :%s", dest, text);
972 * added Sat Jul 25 07:30:42 EST 1992
974 void send_umode_out(struct Client *cptr, struct Client *sptr, int old,
978 struct Client *acptr;
980 send_umode(NULL, sptr, old, SEND_UMODES & ~(prop ? 0 : FLAGS_OPER));
982 for (i = HighestFd; i >= 0; i--) {
983 if ((acptr = LocalClientArray[i]) && IsServer(acptr) &&
984 (acptr != cptr) && (acptr != sptr) && *umodeBuf)
985 sendcmdto_one(sptr, CMD_MODE, acptr, "%s :%s", cli_name(sptr), umodeBuf);
987 if (cptr && MyUser(cptr))
988 send_umode(cptr, sptr, old, ALL_UMODES);
993 * send_user_info - send user info userip/userhost
994 * NOTE: formatter must put info into buffer and return a pointer to the end of
995 * the data it put in the buffer.
997 void send_user_info(struct Client* sptr, char* names, int rpl, InfoFormatter fmt)
1002 int users_found = 0;
1003 struct Client* acptr;
1010 mb = msgq_make(sptr, rpl_str(rpl), cli_name(&me), cli_name(sptr));
1012 for (name = ircd_strtok(&p, names, " "); name; name = ircd_strtok(&p, 0, " ")) {
1013 if ((acptr = FindUser(name))) {
1015 msgq_append(0, mb, " ");
1018 if (5 == ++arg_count)
1021 send_buffer(sptr, mb, 0);
1027 * set_user_mode() added 15/10/91 By Darren Reed.
1030 * parv[1] - username to change mode for
1031 * parv[2] - modes to change
1033 int set_user_mode(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
1037 struct Client *acptr;
1041 unsigned int tmpmask = 0;
1042 int snomask_given = 0;
1049 return need_more_params(sptr, "MODE");
1051 if (!(acptr = FindUser(parv[1])))
1053 if (MyConnect(sptr))
1054 send_reply(sptr, ERR_NOSUCHCHANNEL, parv[1]);
1058 if (IsServer(sptr) || sptr != acptr)
1061 sendcmdto_flag_butone(&me, CMD_WALLOPS, 0, FLAGS_WALLOP,
1062 ":MODE for User %s from %s!%s", parv[1],
1063 cli_name(cptr), cli_name(sptr));
1065 send_reply(sptr, ERR_USERSDONTMATCH);
1073 for (i = 0; i < USERMODELIST_SIZE; ++i) {
1074 if ( (userModeList[i].flag & cli_flags(sptr)))
1075 *m++ = userModeList[i].c;
1078 send_reply(sptr, RPL_UMODEIS, buf);
1079 if ((cli_flags(sptr) & FLAGS_SERVNOTICE) && MyConnect(sptr)
1080 && cli_snomask(sptr) !=
1081 (unsigned int)(IsOper(sptr) ? SNO_OPERDEFAULT : SNO_DEFAULT))
1082 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
1087 * find flags already set for user
1088 * why not just copy them?
1090 setflags = cli_flags(sptr);
1092 if (MyConnect(sptr))
1093 tmpmask = cli_snomask(sptr);
1096 * parse mode change string(s)
1098 for (p = &parv[2]; *p; p++) { /* p is changed in loop too */
1099 for (m = *p; *m; m++) {
1108 if (*(p + 1) && is_snomask(*(p + 1))) {
1110 tmpmask = umode_make_snomask(tmpmask, *++p, what);
1111 tmpmask &= (IsAnOper(sptr) ? SNO_ALL : SNO_USER);
1114 tmpmask = (what == MODE_ADD) ?
1115 (IsAnOper(sptr) ? SNO_OPERDEFAULT : SNO_DEFAULT) : 0;
1117 SetServNotice(sptr);
1119 ClearServNotice(sptr);
1122 if (what == MODE_ADD)
1128 if (what == MODE_ADD)
1131 cli_flags(sptr) &= ~(FLAGS_OPER | FLAGS_LOCOP);
1132 if (MyConnect(sptr)) {
1133 tmpmask = cli_snomask(sptr) & ~SNO_OPER;
1134 cli_handler(sptr) = CLIENT_HANDLER;
1139 if (what == MODE_ADD)
1142 cli_flags(sptr) &= ~(FLAGS_OPER | FLAGS_LOCOP);
1143 if (MyConnect(sptr)) {
1144 tmpmask = cli_snomask(sptr) & ~SNO_OPER;
1145 cli_handler(sptr) = CLIENT_HANDLER;
1150 if (what == MODE_ADD)
1153 ClearInvisible(sptr);
1156 if (what == MODE_ADD)
1162 if (what == MODE_ADD)
1163 SetChannelService(sptr);
1165 ClearChannelService(sptr);
1168 if (what == MODE_ADD)
1179 * Evaluate rules for new user mode
1180 * Stop users making themselves operators too easily:
1182 if (!IsServer(cptr)) {
1183 if (!(setflags & FLAGS_OPER) && IsOper(sptr))
1185 if (!(setflags & FLAGS_LOCOP) && IsLocOp(sptr))
1188 * new umode; servers can set it, local users cannot;
1189 * prevents users from /kick'ing or /mode -o'ing
1191 if (!(setflags & FLAGS_CHSERV))
1192 ClearChannelService(sptr);
1194 * only send wallops to opers
1196 if (feature_bool(FEAT_WALLOPS_OPER_ONLY) && !IsAnOper(sptr) &&
1197 !(setflags & FLAGS_WALLOP))
1199 #ifdef SERVNOTICE_OPER_ONLY
1200 if (MyConnect(sptr) && !IsAnOper(sptr) && !(setflags & FLAGS_SERVNOTICE)) {
1201 ClearServNotice(sptr);
1202 set_snomask(sptr, 0, SNO_SET);
1205 #ifdef DEBUG_OPER_ONLY
1206 if (!IsAnOper(sptr) && !(setflags & FLAGS_DEBUG))
1210 if (MyConnect(sptr)) {
1211 if ((setflags & (FLAGS_OPER | FLAGS_LOCOP)) && !IsAnOper(sptr))
1212 det_confs_butmask(sptr, CONF_CLIENT & ~CONF_OPS);
1214 if (SendServNotice(sptr)) {
1215 if (tmpmask != cli_snomask(sptr))
1216 set_snomask(sptr, tmpmask, SNO_SET);
1217 if (cli_snomask(sptr) && snomask_given)
1218 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
1220 set_snomask(sptr, 0, SNO_SET);
1223 * Compare new flags with old flags and send string which
1224 * will cause servers to update correctly.
1226 if (!(setflags & FLAGS_OPER) && IsOper(sptr)) { /* user now oper */
1228 client_set_privs(sptr); /* may set propagate privilege */
1230 if (HasPriv(sptr, PRIV_PROPAGATE)) /* remember propagate privilege setting */
1232 if ((setflags & FLAGS_OPER) && !IsOper(sptr)) { /* user no longer oper */
1234 client_set_privs(sptr); /* will clear propagate privilege */
1236 if ((setflags & FLAGS_INVISIBLE) && !IsInvisible(sptr))
1237 --UserStats.inv_clients;
1238 if (!(setflags & FLAGS_INVISIBLE) && IsInvisible(sptr))
1239 ++UserStats.inv_clients;
1240 send_umode_out(cptr, sptr, setflags, prop);
1246 * Build umode string for BURST command
1249 char *umode_str(struct Client *cptr)
1251 char* m = umodeBuf; /* Maximum string size: "owidg\0" */
1255 c_flags = cli_flags(cptr) & SEND_UMODES; /* cleaning up the original code */
1256 if (HasPriv(cptr, PRIV_PROPAGATE))
1257 c_flags |= FLAGS_OPER;
1259 c_flags &= ~FLAGS_OPER;
1261 for (i = 0; i < USERMODELIST_SIZE; ++i) {
1262 if ( (c_flags & userModeList[i].flag))
1263 *m++ = userModeList[i].c;
1267 return umodeBuf; /* Note: static buffer, gets
1268 overwritten by send_umode() */
1272 * Send the MODE string for user (user) to connection cptr
1275 void send_umode(struct Client *cptr, struct Client *sptr, int old, int sendmask)
1280 int what = MODE_NULL;
1283 * Build a string in umodeBuf to represent the change in the user's
1284 * mode between the new (sptr->flag) and 'old'.
1288 for (i = 0; i < USERMODELIST_SIZE; ++i) {
1289 flag = userModeList[i].flag;
1290 if (MyUser(sptr) && !(flag & sendmask))
1292 if ( (flag & old) && !(cli_flags(sptr) & flag))
1294 if (what == MODE_DEL)
1295 *m++ = userModeList[i].c;
1300 *m++ = userModeList[i].c;
1303 else if (!(flag & old) && (cli_flags(sptr) & flag))
1305 if (what == MODE_ADD)
1306 *m++ = userModeList[i].c;
1311 *m++ = userModeList[i].c;
1316 if (*umodeBuf && cptr)
1317 sendcmdto_one(sptr, CMD_MODE, cptr, "%s :%s", cli_name(sptr), umodeBuf);
1321 * Check to see if this resembles a sno_mask. It is if 1) there is
1322 * at least one digit and 2) The first digit occurs before the first
1323 * alphabetic character.
1325 int is_snomask(char *word)
1329 for (; *word; word++)
1332 else if (IsAlpha(*word))
1339 * If it begins with a +, count this as an additive mask instead of just
1340 * a replacement. If what == MODE_DEL, "+" has no special effect.
1342 unsigned int umode_make_snomask(unsigned int oldmask, char *arg, int what)
1344 unsigned int sno_what;
1345 unsigned int newmask;
1349 if (what == MODE_ADD)
1354 else if (*arg == '-')
1357 if (what == MODE_ADD)
1363 sno_what = (what == MODE_ADD) ? SNO_SET : SNO_DEL;
1364 /* pity we don't have strtoul everywhere */
1365 newmask = (unsigned int)atoi(arg);
1366 if (sno_what == SNO_DEL)
1367 newmask = oldmask & ~newmask;
1368 else if (sno_what == SNO_ADD)
1373 static void delfrom_list(struct Client *cptr, struct SLink **list)
1376 struct SLink* prv = NULL;
1378 for (tmp = *list; tmp; tmp = tmp->next) {
1379 if (tmp->value.cptr == cptr) {
1381 prv->next = tmp->next;
1392 * This function sets a Client's server notices mask, according to
1393 * the parameter 'what'. This could be even faster, but the code
1394 * gets mighty hard to read :)
1396 void set_snomask(struct Client *cptr, unsigned int newmask, int what)
1398 unsigned int oldmask, diffmask; /* unsigned please */
1402 oldmask = cli_snomask(cptr);
1404 if (what == SNO_ADD)
1406 else if (what == SNO_DEL)
1407 newmask = oldmask & ~newmask;
1408 else if (what != SNO_SET) /* absolute set, no math needed */
1409 sendto_opmask_butone(0, SNO_OLDSNO, "setsnomask called with %d ?!", what);
1411 newmask &= (IsAnOper(cptr) ? SNO_ALL : SNO_USER);
1413 diffmask = oldmask ^ newmask;
1415 for (i = 0; diffmask >> i; i++) {
1416 if (((diffmask >> i) & 1))
1418 if (((newmask >> i) & 1))
1421 tmp->next = opsarray[i];
1422 tmp->value.cptr = cptr;
1426 /* not real portable :( */
1427 delfrom_list(cptr, &opsarray[i]);
1430 cli_snomask(cptr) = newmask;
1434 * is_silenced : Does the actual check wether sptr is allowed
1435 * to send a message to acptr.
1436 * Both must be registered persons.
1437 * If sptr is silenced by acptr, his message should not be propagated,
1438 * but more over, if this is detected on a server not local to sptr
1439 * the SILENCE mask is sent upstream.
1441 int is_silenced(struct Client *sptr, struct Client *acptr)
1445 static char sender[HOSTLEN + NICKLEN + USERLEN + 5];
1446 static char senderip[16 + NICKLEN + USERLEN + 5];
1448 if (!cli_user(acptr) || !(lp = cli_user(acptr)->silence) || !(user = cli_user(sptr)))
1450 ircd_snprintf(0, sender, sizeof(sender), "%s!%s@%s", cli_name(sptr),
1451 user->username, user->host);
1452 ircd_snprintf(0, senderip, sizeof(senderip), "%s!%s@%s", cli_name(sptr),
1453 user->username, ircd_ntoa((const char*) &(cli_ip(sptr))));
1454 for (; lp; lp = lp->next)
1456 if ((!(lp->flags & CHFL_SILENCE_IPMASK) && !match(lp->value.cp, sender)) ||
1457 ((lp->flags & CHFL_SILENCE_IPMASK) && !match(lp->value.cp, senderip)))
1459 if (!MyConnect(sptr))
1461 sendcmdto_one(acptr, CMD_SILENCE, cli_from(sptr), "%C %s", sptr,
1473 * Removes all silence masks from the list of sptr that fall within `mask'
1474 * Returns -1 if none where found, 0 otherwise.
1476 int del_silence(struct Client *sptr, char *mask)
1482 for (lp = &(cli_user(sptr))->silence; *lp;) {
1483 if (!mmatch(mask, (*lp)->value.cp))
1487 MyFree(tmp->value.cp);
1497 int add_silence(struct Client* sptr, const char* mask)
1499 struct SLink *lp, **lpp;
1500 int cnt = 0, len = strlen(mask);
1503 for (lpp = &(cli_user(sptr))->silence, lp = *lpp; lp;)
1505 if (0 == ircd_strcmp(mask, lp->value.cp))
1507 if (!mmatch(mask, lp->value.cp))
1509 struct SLink *tmp = lp;
1510 *lpp = lp = lp->next;
1511 MyFree(tmp->value.cp);
1517 len += strlen(lp->value.cp);
1518 if ((len > (feature_int(FEAT_AVBANLEN) * feature_int(FEAT_MAXSILES))) ||
1519 (++cnt >= feature_int(FEAT_MAXSILES)))
1521 send_reply(sptr, ERR_SILELISTFULL, mask);
1524 else if (!mmatch(lp->value.cp, mask))
1531 memset(lp, 0, sizeof(struct SLink));
1532 lp->next = cli_user(sptr)->silence;
1533 lp->value.cp = (char*) MyMalloc(strlen(mask) + 1);
1534 assert(0 != lp->value.cp);
1535 strcpy(lp->value.cp, mask);
1536 if ((ip_start = strrchr(mask, '@')) && check_if_ipmask(ip_start + 1))
1537 lp->flags = CHFL_SILENCE_IPMASK;
1538 cli_user(sptr)->silence = lp;
1543 send_supported(struct Client *cptr)
1545 char featurebuf[512];
1547 ircd_snprintf(0, featurebuf, sizeof(featurebuf), FEATURES1, FEATURESVALUES1);
1548 send_reply(sptr, RPL_ISUPPORT, featurebuf);
1549 ircd_snprintf(0, featurebuf, sizeof(featurebuf), FEATURES2, FEATURESVALUES2);
1550 send_reply(sptr, RPL_ISUPPORT, featurebuf);
1552 return 0; /* convenience return, if it's ever needed */