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.
35 #include "ircd_alloc.h"
36 #include "ircd_chattr.h"
37 #include "ircd_features.h"
39 #include "ircd_policy.h"
40 #include "ircd_reply.h"
41 #include "ircd_string.h"
50 #include "querycmds.h"
56 #include "s_serv.h" /* max_client_count */
58 #include "sprintf_irc.h"
61 #include "supported.h"
67 #include "handlers.h" /* m_motd and m_lusers */
77 static int userCount = 0;
80 * 'make_user' add's an User information block to a client
81 * if it was not previously allocated.
83 struct User *make_user(struct Client *cptr)
87 if (!cli_user(cptr)) {
88 cli_user(cptr) = (struct User*) MyMalloc(sizeof(struct User));
89 assert(0 != cli_user(cptr));
91 /* All variables are 0 by default */
92 memset(cli_user(cptr), 0, sizeof(struct User));
96 cli_user(cptr)->refcnt = 1;
98 return cli_user(cptr);
104 * Decrease user reference count by one and release block, if count reaches 0.
106 void free_user(struct User* user)
109 assert(0 < user->refcnt);
111 if (--user->refcnt == 0) {
117 assert(0 == user->joined);
118 assert(0 == user->invited);
119 assert(0 == user->channel);
128 void user_count_memory(size_t* count_out, size_t* bytes_out)
130 assert(0 != count_out);
131 assert(0 != bytes_out);
132 *count_out = userCount;
133 *bytes_out = userCount * sizeof(struct User);
140 * Local function to find the next matching client. The search
141 * can be continued from the specified client entry. Normal
144 * for (x = client; x = next_client(x,mask); x = x->next)
145 * HandleMatchingClient;
148 struct Client *next_client(struct Client *next, const char* ch)
150 struct Client *tmp = next;
155 next = FindClient(ch);
156 next = next ? next : tmp;
157 if (cli_prev(tmp) == next)
161 for (; next; next = cli_next(next))
162 if (!match(ch, cli_name(next)))
170 * Do the basic thing in delivering the message (command)
171 * across the relays to the specific server (server) for
174 * Note: The command is a format string and *MUST* be
175 * of prefixed style (e.g. ":%s COMMAND %s ...").
176 * Command can have only max 8 parameters.
178 * server parv[server] is the parameter identifying the
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 /* Make sure it's a server */
201 /* Make sure it's a server */
202 if (!strchr(to, '*')) {
203 if (0 == (acptr = FindClient(to)))
204 return HUNTED_NOSUCH;
207 acptr = cli_user(acptr)->server;
208 } else if (!(acptr = find_match_server(to))) {
209 send_reply(from, ERR_NOSUCHSERVER, to);
210 return (HUNTED_NOSUCH);
212 } else if (!(acptr = FindNServer(to)))
213 return (HUNTED_NOSUCH); /* Server broke off in the meantime */
216 return (HUNTED_ISME);
218 if (MustBeOper && !IsPrivileged(from)) {
219 send_reply(from, ERR_NOPRIVILEGES);
220 return HUNTED_NOSUCH;
223 assert(!IsServer(from));
225 parv[server] = (char *) acptr; /* HACK! HACK! HACK! ARGH! */
227 sendcmdto_one(from, cmd, tok, acptr, pattern, parv[1], parv[2], parv[3],
228 parv[4], parv[5], parv[6], parv[7], parv[8]);
230 return (HUNTED_PASS);
234 * 'do_nick_name' ensures that the given parameter (nick) is really a proper
235 * string for a nickname (note, the 'nick' may be modified in the process...)
237 * RETURNS the length of the final NICKNAME (0, if nickname is invalid)
239 * Nickname characters are in range 'A'..'}', '_', '-', '0'..'9'
240 * anything outside the above set will terminate nickname.
241 * In addition, the first character cannot be '-' or a Digit.
244 * The '~'-character should be allowed, but a change should be global,
245 * some confusion would result if only few servers allowed it...
247 int do_nick_name(char* nick)
250 char* end = ch + NICKLEN;
253 if (*ch == '-' || IsDigit(*ch)) /* first character in [0..9-] */
256 for ( ; (ch < end) && *ch; ++ch)
257 if (!IsNickChar(*ch))
268 * Copy `source' to `dest', replacing all occurances of '~' and characters that
269 * are not `isIrcUi' by an underscore.
270 * Copies at most USERLEN - 1 characters or up till the first control character.
271 * If `tilde' is true, then a tilde is prepended to `dest'.
272 * Note that `dest' and `source' can point to the same area or to different
273 * non-overlapping areas.
275 static char *clean_user_id(char *dest, char *source, int tilde)
282 ch = *s++; /* Store first character to copy: */
285 *d++ = '~'; /* If `dest' == `source', then this overwrites `ch' */
288 while (ch && !IsCntrl(ch) && rlen--)
290 char nch = *s++; /* Store next character to copy */
291 *d++ = IsUserChar(ch) ? ch : '_'; /* This possibly overwrites it */
304 * This function is called when both NICK and USER messages
305 * have been accepted for the client, in whatever order. Only
306 * after this the USER message is propagated.
308 * NICK's must be propagated at once when received, although
309 * it would be better to delay them too until full info is
310 * available. Doing it is not so simple though, would have
311 * to implement the following:
313 * 1) user telnets in and gives only "NICK foobar" and waits
314 * 2) another user far away logs in normally with the nick
315 * "foobar" (quite legal, as this server didn't propagate it).
316 * 3) now this server gets nick "foobar" from outside, but
317 * has already the same defined locally. Current server
318 * would just issue "KILL foobar" to clean out dups. But,
319 * this is not fair. It should actually request another
320 * nick from local user or kill him/her...
322 int register_user(struct Client *cptr, struct Client *sptr,
323 const char *nick, char *username, struct Gline *agline)
325 struct ConfItem* aconf;
329 char c = 0; /* not alphanum */
330 char d = 'a'; /* not a digit */
338 short digitgroups = 0;
339 struct User* user = cli_user(sptr);
341 char featurebuf[512];
343 user->last = CurrentTime;
344 parv[0] = cli_name(sptr);
345 parv[1] = parv[2] = NULL;
349 static time_t last_too_many1;
350 static time_t last_too_many2;
352 assert(cptr == sptr);
353 switch (conf_check_client(sptr))
357 case ACR_NO_AUTHORIZATION:
358 sendto_opmask_butone(0, SNO_UNAUTH, "Unauthorized connection from %s.",
359 get_client_name(sptr, HIDE_IP));
360 ++ServerStats->is_ref;
361 return exit_client(cptr, sptr, &me,
362 "No Authorization - use another server");
363 case ACR_TOO_MANY_IN_CLASS:
364 if (CurrentTime - last_too_many1 >= (time_t) 60)
366 last_too_many1 = CurrentTime;
367 sendto_opmask_butone(0, SNO_TOOMANY, "Too many connections in "
368 "class %i for %s.", get_client_class(sptr),
369 get_client_name(sptr, SHOW_IP));
371 ++ServerStats->is_ref;
372 IPcheck_connect_fail(cli_ip(sptr));
373 return exit_client(cptr, sptr, &me,
374 "Sorry, your connection class is full - try "
375 "again later or try another server");
376 case ACR_TOO_MANY_FROM_IP:
377 if (CurrentTime - last_too_many2 >= (time_t) 60)
379 last_too_many2 = CurrentTime;
380 sendto_opmask_butone(0, SNO_TOOMANY, "Too many connections from "
382 get_client_name(sptr, SHOW_IP));
384 ++ServerStats->is_ref;
385 return exit_client(cptr, sptr, &me,
386 "Too many connections from your host");
387 case ACR_ALREADY_AUTHORIZED:
388 /* Can this ever happen? */
390 ++ServerStats->is_ref;
391 IPcheck_connect_fail(cli_ip(sptr));
392 return exit_client(cptr, sptr, &me, "Unknown error -- Try again");
394 ircd_strncpy(user->host, cli_sockhost(sptr), HOSTLEN);
395 aconf = cli_confs(sptr)->value.aconf;
397 clean_user_id(user->username,
398 (cli_flags(sptr) & FLAGS_GOTID) ? cli_username(sptr) : username,
399 (cli_flags(sptr) & FLAGS_DOID) && !(cli_flags(sptr) & FLAGS_GOTID));
401 if ((user->username[0] == '\0')
402 || ((user->username[0] == '~') && (user->username[1] == '\000')))
403 return exit_client(cptr, sptr, &me, "USER: Bogus userid.");
405 if (!EmptyString(aconf->passwd)
406 && !(IsDigit(*aconf->passwd) && !aconf->passwd[1])
407 && strcmp(cli_passwd(sptr), aconf->passwd))
409 ServerStats->is_ref++;
410 IPcheck_connect_fail(cli_ip(sptr));
411 send_reply(sptr, ERR_PASSWDMISMATCH);
412 return exit_client(cptr, sptr, &me, "Bad Password");
414 memset(cli_passwd(sptr), 0, sizeof(cli_passwd(sptr)));
416 * following block for the benefit of time-dependent K:-lines
418 if (find_kill(sptr)) {
419 ServerStats->is_ref++;
420 IPcheck_connect_fail(cli_ip(sptr));
421 return exit_client(cptr, sptr, &me, "K-lined");
424 * Check for mixed case usernames, meaning probably hacked. Jon2 3-94
425 * Summary of rules now implemented in this patch: Ensor 11-94
426 * In a mixed-case name, if first char is upper, one more upper may
427 * appear anywhere. (A mixed-case name *must* have an upper first
428 * char, and may have one other upper.)
429 * A third upper may appear if all 3 appear at the beginning of the
430 * name, separated only by "others" (-/_/.).
431 * A single group of digits is allowed anywhere.
432 * Two groups of digits are allowed if at least one of the groups is
433 * at the beginning or the end.
434 * Only one '-', '_', or '.' is allowed (or two, if not consecutive).
435 * But not as the first or last char.
436 * No other special characters are allowed.
437 * Name must contain at least one letter.
439 tmpstr2 = tmpstr = (username[0] == '~' ? &username[1] : username);
440 while (*tmpstr && !badid)
452 if ((leadcaps || pos == 1) && !lower && !digits)
458 if (pos == 1 || !IsDigit(d))
465 else if (c == '-' || c == '_' || c == '.')
470 else if (d == '-' || d == '_' || d == '.' || other > 2)
479 if (lower && upper && (!leadcaps || leadcaps > 3 ||
480 (upper > 2 && upper > leadcaps)))
482 else if (digitgroups == 2 && !(IsDigit(tmpstr2[0]) || IsDigit(c)))
484 else if ((!lower && !upper) || !IsAlnum(c))
487 if (badid && (!(cli_flags(sptr) & FLAGS_GOTID) ||
488 strcmp(cli_username(sptr), username) != 0))
490 ServerStats->is_ref++;
492 send_reply(cptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
493 ":Your username is invalid.");
494 send_reply(cptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
495 ":Connect with your real username, in lowercase.");
496 send_reply(cptr, SND_EXPLICIT | ERR_INVALIDUSERNAME,
497 ":If your mail address were foo@bar.com, your username "
499 return exit_client(cptr, sptr, &me, "USER: Bad username");
501 Count_unknownbecomesclient(sptr, UserStats);
504 ircd_strncpy(user->username, username, USERLEN);
505 Count_newremoteclient(UserStats, user->server);
509 /* a gline wasn't passed in, so find a matching global one that isn't
510 * a Uworld-set one, and propagate it if there is such an animal.
513 (agline = gline_lookup(sptr, GLINE_GLOBAL | GLINE_LASTMOD)) &&
514 !IsBurstOrBurstAck(cptr))
515 gline_resend(cptr, agline);
517 if (IsInvisible(sptr))
518 ++UserStats.inv_clients;
522 if (MyConnect(sptr)) {
523 cli_handler(sptr) = CLIENT_HANDLER;
524 release_dns_reply(sptr);
526 send_reply(sptr, RPL_WELCOME, nick);
528 * This is a duplicate of the NOTICE but see below...
530 send_reply(sptr, RPL_YOURHOST, cli_name(&me), version);
531 send_reply(sptr, RPL_CREATED, creation);
532 send_reply(sptr, RPL_MYINFO, cli_name(&me), version);
533 sprintf_irc(featurebuf,FEATURES,FEATURESVALUES);
534 send_reply(sptr, RPL_ISUPPORT, featurebuf);
535 m_lusers(sptr, sptr, 1, parv);
538 /* nextping = CurrentTime; */
539 if (cli_snomask(sptr) & SNO_NOISY)
540 set_snomask(sptr, cli_snomask(sptr) & SNO_NOISY, SNO_ADD);
541 IPcheck_connect_succeeded(sptr);
544 /* if (IsServer(cptr)) */
546 struct Client *acptr;
548 acptr = user->server;
549 if (cli_from(acptr) != cli_from(sptr))
551 sendcmdto_one(&me, CMD_KILL, cptr, "%C :%s (%s != %s[%s])",
552 sptr, cli_name(&me), cli_name(user->server), cli_name(cli_from(acptr)),
553 cli_sockhost(cli_from(acptr)));
554 cli_flags(sptr) |= FLAGS_KILLED;
555 return exit_client(cptr, sptr, &me, "NICK server wrong direction");
558 cli_flags(sptr) |= (cli_flags(acptr) & FLAGS_TS8);
561 * Check to see if this user is being propogated
562 * as part of a net.burst, or is using protocol 9.
563 * FIXME: This can be speeded up - its stupid to check it for
564 * every NICK message in a burst again --Run.
566 for (acptr = user->server; acptr != &me; acptr = cli_serv(acptr)->up) {
567 if (IsBurst(acptr) || Protocol(acptr) < 10)
570 if (!IPcheck_remote_connect(sptr, (acptr != &me))) {
572 * We ran out of bits to count this
574 sendcmdto_one(&me, CMD_KILL, sptr, "%C :%s (Too many connections from your host -- Ghost)",
575 sptr, cli_name(&me));
576 return exit_client(cptr, sptr, &me,"Too many connections from your host -- throttled");
579 tmpstr = umode_str(sptr);
581 sendcmdto_serv_butone(user->server, CMD_NICK, cptr,
582 "%s %d %Tu %s %s %s%s%s%%%Tu:%s@%s %s %s%s :%s",
583 nick, cli_hopcount(sptr) + 1, cli_lastnick(sptr),
584 user->username, user->host,
585 *tmpstr ? "+" : "", tmpstr, *tmpstr ? " " : "",
586 GlineLastMod(agline), GlineUser(agline),
588 inttobase64(ip_base64, ntohl(cli_ip(sptr).s_addr), 6),
589 NumNick(sptr), cli_info(sptr));
591 sendcmdto_serv_butone(user->server, CMD_NICK, cptr,
592 "%s %d %Tu %s %s %s%s%s%s %s%s :%s",
593 nick, cli_hopcount(sptr) + 1, cli_lastnick(sptr),
594 user->username, user->host,
595 *tmpstr ? "+" : "", tmpstr, *tmpstr ? " " : "",
596 inttobase64(ip_base64, ntohl(cli_ip(sptr).s_addr), 6),
597 NumNick(sptr), cli_info(sptr));
599 /* Send umode to client */
602 send_umode(cptr, sptr, 0, ALL_UMODES);
603 if (cli_snomask(sptr) != SNO_DEFAULT && (cli_flags(sptr) & FLAGS_SERVNOTICE))
604 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
611 static const struct UserMode {
616 { FLAGS_LOCOP, 'O' },
617 { FLAGS_INVISIBLE, 'i' },
618 { FLAGS_WALLOP, 'w' },
619 { FLAGS_SERVNOTICE, 's' },
621 { FLAGS_CHSERV, 'k' },
625 #define USERMODELIST_SIZE sizeof(userModeList) / sizeof(struct UserMode)
628 * XXX - find a way to get rid of this
630 static char umodeBuf[BUFSIZE];
632 int set_nick_name(struct Client* cptr, struct Client* sptr,
633 const char* nick, int parc, char* parv[])
635 if (IsServer(sptr)) {
639 struct Gline *agline = 0;
642 * A server introducing a new client, change source
644 struct Client* new_client = make_client(cptr, STAT_UNKNOWN);
645 assert(0 != new_client);
647 cli_hopcount(new_client) = atoi(parv[2]);
648 cli_lastnick(new_client) = atoi(parv[3]);
649 if (Protocol(cptr) > 9 && parc > 7 && *parv[6] == '+') {
650 for (p = parv[6] + 1; *p; p++) {
651 for (i = 0; i < USERMODELIST_SIZE; ++i) {
652 if (userModeList[i].c == *p) {
653 cli_flags(new_client) |= userModeList[i].flag;
659 client_set_privs(new_client); /* set privs on user */
663 strcpy(cli_name(new_client), nick);
664 cli_user(new_client) = make_user(new_client);
665 cli_user(new_client)->server = sptr;
666 SetRemoteNumNick(new_client, parv[parc - 2]);
668 * IP# of remote client
670 cli_ip(new_client).s_addr = htonl(base64toint(parv[parc - 3]));
672 add_client_to_list(new_client);
673 hAddClient(new_client);
675 cli_serv(sptr)->ghost = 0; /* :server NICK means end of net.burst */
676 ircd_strncpy(cli_username(new_client), parv[4], USERLEN);
677 ircd_strncpy(cli_user(new_client)->host, parv[5], HOSTLEN);
678 ircd_strncpy(cli_info(new_client), parv[parc - 1], REALLEN);
680 /* Deal with GLINE parameters... */
681 if (*parv[parc - 4] == '%' && (t = strchr(parv[parc - 4] + 1, ':'))) {
685 lastmod = atoi(parv[parc - 4] + 1);
688 (agline = gline_find(t, GLINE_EXACT | GLINE_GLOBAL | GLINE_LASTMOD))
689 && GlineLastMod(agline) > lastmod && !IsBurstOrBurstAck(cptr))
690 gline_resend(cptr, agline);
692 return register_user(cptr, new_client, cli_name(new_client), parv[4], agline);
694 else if ((cli_name(sptr))[0]) {
696 * Client changing its nick
698 * If the client belongs to me, then check to see
699 * if client is on any channels where it is currently
700 * banned. If so, do not allow the nick change to occur.
703 const char* channel_name;
704 if ((channel_name = find_no_nickchange_channel(sptr))) {
705 return send_reply(cptr, ERR_BANNICKCHANGE, channel_name);
708 * Refuse nick change if the last nick change was less
709 * then 30 seconds ago. This is intended to get rid of
710 * clone bots doing NICK FLOOD. -SeKs
711 * If someone didn't change their nick for more then 60 seconds
712 * however, allow to do two nick changes immedately after another
713 * before limiting the nick flood. -Run
715 if (CurrentTime < cli_nextnick(cptr)) {
716 cli_nextnick(cptr) += 2;
717 send_reply(cptr, ERR_NICKTOOFAST, parv[1],
718 cli_nextnick(cptr) - CurrentTime);
719 /* Send error message */
720 sendcmdto_one(cptr, CMD_NICK, cptr, "%s", cli_name(cptr));
721 /* bounce NICK to user */
722 return 0; /* ignore nick change! */
725 /* Limit total to 1 change per NICK_DELAY seconds: */
726 cli_nextnick(cptr) += NICK_DELAY;
727 /* However allow _maximal_ 1 extra consecutive nick change: */
728 if (cli_nextnick(cptr) < CurrentTime)
729 cli_nextnick(cptr) = CurrentTime;
733 * Also set 'lastnick' to current time, if changed.
735 if (0 != ircd_strcmp(parv[0], nick))
736 cli_lastnick(sptr) = (sptr == cptr) ? TStime() : atoi(parv[2]);
739 * Client just changing his/her nick. If he/she is
740 * on a channel, send note of change to all clients
741 * on that channel. Propagate notice to other servers.
744 sendcmdto_common_channels(sptr, CMD_NICK, ":%s", nick);
745 add_history(sptr, 1);
746 sendcmdto_serv_butone(sptr, CMD_NICK, cptr, "%s %Tu", nick,
750 sendcmdto_one(sptr, CMD_NICK, sptr, ":%s", nick);
752 if ((cli_name(sptr))[0])
754 strcpy(cli_name(sptr), nick);
758 /* Local client setting NICK the first time */
760 strcpy(cli_name(sptr), nick);
761 if (!cli_user(sptr)) {
762 cli_user(sptr) = make_user(sptr);
763 cli_user(sptr)->server = &me;
765 SetLocalNumNick(sptr);
769 * If the client hasn't gotten a cookie-ping yet,
770 * choose a cookie and send it. -record!jegelhof@cloud9.net
772 if (!cli_cookie(sptr)) {
774 cli_cookie(sptr) = (ircrandom() & 0x7fffffff);
775 } while (!cli_cookie(sptr));
776 sendrawto_one(cptr, MSG_PING " :%u", cli_cookie(sptr));
778 else if (*(cli_user(sptr))->host && cli_cookie(sptr) == COOKIE_VERIFIED) {
780 * USER and PONG already received, now we have NICK.
781 * register_user may reject the client and call exit_client
782 * for it - must test this and exit m_nick too !
784 cli_lastnick(sptr) = TStime(); /* Always local client */
785 if (register_user(cptr, sptr, nick, cli_user(sptr)->username, 0) == CPTR_KILLED)
792 static unsigned char hash_target(unsigned int target)
794 return (unsigned char) (target >> 16) ^ (target >> 8);
800 * sptr must be a local client!
802 * Cannonifies target for client `sptr'.
804 void add_target(struct Client *sptr, void *target)
806 /* Ok, this shouldn't work esp on alpha
808 unsigned char hash = hash_target((unsigned long) target);
809 unsigned char* targets;
812 assert(cli_local(sptr));
814 targets = cli_targets(sptr);
818 for (i = 0; i < MAXTARGETS; ++i) {
819 if (targets[i] == hash)
825 memmove(&targets[RESERVEDTARGETS + 1],
826 &targets[RESERVEDTARGETS], MAXTARGETS - RESERVEDTARGETS - 1);
827 targets[RESERVEDTARGETS] = hash;
833 * sptr must be a local client !
835 * Returns 'true' (1) when too many targets are addressed.
836 * Returns 'false' (0) when it's ok to send to this target.
838 int check_target_limit(struct Client *sptr, void *target, const char *name,
841 unsigned char hash = hash_target((unsigned long) target);
843 unsigned char* targets;
846 assert(cli_local(sptr));
847 targets = cli_targets(sptr);
850 * Same target as last time?
852 if (targets[0] == hash)
854 for (i = 1; i < MAXTARGETS; ++i) {
855 if (targets[i] == hash) {
856 memmove(&targets[1], &targets[0], i);
865 if (CurrentTime < cli_nexttarget(sptr)) {
866 if (cli_nexttarget(sptr) - CurrentTime < TARGET_DELAY + 8) {
870 cli_nexttarget(sptr) += 2;
871 send_reply(sptr, ERR_TARGETTOOFAST, name,
872 cli_nexttarget(sptr) - CurrentTime);
877 cli_nexttarget(sptr) += TARGET_DELAY;
878 if (cli_nexttarget(sptr) < CurrentTime - (TARGET_DELAY * (MAXTARGETS - 1)))
879 cli_nexttarget(sptr) = CurrentTime - (TARGET_DELAY * (MAXTARGETS - 1));
882 memmove(&targets[1], &targets[0], MAXTARGETS - 1);
888 * whisper - called from m_cnotice and m_cprivmsg.
890 * parv[0] = sender prefix
893 * parv[3] = Private message text
895 * Added 971023 by Run.
896 * Reason: Allows channel operators to sent an arbitrary number of private
897 * messages to users on their channel, avoiding the max.targets limit.
898 * Building this into m_private would use too much cpu because we'd have
899 * to a cross channel lookup for every private message!
900 * Note that we can't allow non-chan ops to use this command, it would be
901 * abused by mass advertisers.
904 int whisper(struct Client* source, const char* nick, const char* channel,
905 const char* text, int is_notice)
908 struct Channel* chptr;
909 struct Membership* membership;
913 assert(0 != channel);
914 assert(MyUser(source));
916 if (!(dest = FindUser(nick))) {
917 return send_reply(source, ERR_NOSUCHNICK, nick);
919 if (!(chptr = FindChannel(channel))) {
920 return send_reply(source, ERR_NOSUCHCHANNEL, channel);
923 * compare both users channel lists, instead of the channels user list
924 * since the link is the same, this should be a little faster for channels
925 * with a lot of users
927 for (membership = cli_user(source)->channel; membership; membership = membership->next_channel) {
928 if (chptr == membership->channel)
931 if (0 == membership) {
932 return send_reply(source, ERR_NOTONCHANNEL, chptr->chname);
934 if (!IsVoicedOrOpped(membership)) {
935 return send_reply(source, ERR_VOICENEEDED, chptr->chname);
938 * lookup channel in destination
940 assert(0 != cli_user(dest));
941 for (membership = cli_user(dest)->channel; membership; membership = membership->next_channel) {
942 if (chptr == membership->channel)
945 if (0 == membership || IsZombie(membership)) {
946 return send_reply(source, ERR_USERNOTINCHANNEL, cli_name(dest), chptr->chname);
948 if (is_silenced(source, dest))
951 if (cli_user(dest)->away)
952 send_reply(source, RPL_AWAY, cli_name(dest), cli_user(dest)->away);
954 sendcmdto_one(source, CMD_NOTICE, dest, "%C :%s", dest, text);
956 sendcmdto_one(source, CMD_PRIVATE, dest, "%C :%s", dest, text);
962 * added Sat Jul 25 07:30:42 EST 1992
964 void send_umode_out(struct Client *cptr, struct Client *sptr, int old,
968 struct Client *acptr;
970 send_umode(NULL, sptr, old, SEND_UMODES & ~(prop ? 0 : FLAGS_OPER));
972 for (i = HighestFd; i >= 0; i--) {
973 if ((acptr = LocalClientArray[i]) && IsServer(acptr) &&
974 (acptr != cptr) && (acptr != sptr) && *umodeBuf)
975 sendcmdto_one(sptr, CMD_MODE, acptr, "%s :%s", cli_name(sptr), umodeBuf);
977 if (cptr && MyUser(cptr))
978 send_umode(cptr, sptr, old, ALL_UMODES);
983 * send_user_info - send user info userip/userhost
984 * NOTE: formatter must put info into buffer and return a pointer to the end of
985 * the data it put in the buffer.
987 void send_user_info(struct Client* sptr, char* names, int rpl, InfoFormatter fmt)
993 struct Client* acptr;
1000 mb = msgq_make(sptr, rpl_str(rpl), cli_name(&me), cli_name(sptr));
1002 for (name = ircd_strtok(&p, names, " "); name; name = ircd_strtok(&p, 0, " ")) {
1003 if ((acptr = FindUser(name))) {
1005 msgq_append(0, mb, " ");
1008 if (5 == ++arg_count)
1011 send_buffer(sptr, mb, 0);
1017 * set_user_mode() added 15/10/91 By Darren Reed.
1020 * parv[1] - username to change mode for
1021 * parv[2] - modes to change
1023 int set_user_mode(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
1027 struct Client *acptr;
1031 unsigned int tmpmask = 0;
1032 int snomask_given = 0;
1039 return need_more_params(sptr, "MODE");
1041 if (!(acptr = FindUser(parv[1])))
1043 if (MyConnect(sptr))
1044 send_reply(sptr, ERR_NOSUCHCHANNEL, parv[1]);
1048 if (IsServer(sptr) || sptr != acptr)
1051 sendcmdto_flag_butone(&me, CMD_WALLOPS, 0, FLAGS_WALLOP,
1052 ":MODE for User %s from %s!%s", parv[1],
1053 cli_name(cptr), cli_name(sptr));
1055 send_reply(sptr, ERR_USERSDONTMATCH);
1063 for (i = 0; i < USERMODELIST_SIZE; ++i) {
1064 if ( (userModeList[i].flag & cli_flags(sptr)))
1065 *m++ = userModeList[i].c;
1068 send_reply(sptr, RPL_UMODEIS, buf);
1069 if ((cli_flags(sptr) & FLAGS_SERVNOTICE) && MyConnect(sptr)
1070 && cli_snomask(sptr) !=
1071 (unsigned int)(IsOper(sptr) ? SNO_OPERDEFAULT : SNO_DEFAULT))
1072 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
1077 * find flags already set for user
1078 * why not just copy them?
1080 setflags = cli_flags(sptr);
1082 if (MyConnect(sptr))
1083 tmpmask = cli_snomask(sptr);
1086 * parse mode change string(s)
1088 for (p = &parv[2]; *p; p++) { /* p is changed in loop too */
1089 for (m = *p; *m; m++) {
1098 if (*(p + 1) && is_snomask(*(p + 1))) {
1100 tmpmask = umode_make_snomask(tmpmask, *++p, what);
1101 tmpmask &= (IsAnOper(sptr) ? SNO_ALL : SNO_USER);
1104 tmpmask = (what == MODE_ADD) ?
1105 (IsAnOper(sptr) ? SNO_OPERDEFAULT : SNO_DEFAULT) : 0;
1107 SetServNotice(sptr);
1109 ClearServNotice(sptr);
1112 if (what == MODE_ADD)
1118 if (what == MODE_ADD)
1121 cli_flags(sptr) &= ~(FLAGS_OPER | FLAGS_LOCOP);
1122 if (MyConnect(sptr)) {
1123 tmpmask = cli_snomask(sptr) & ~SNO_OPER;
1124 cli_handler(sptr) = CLIENT_HANDLER;
1129 if (what == MODE_ADD)
1132 cli_flags(sptr) &= ~(FLAGS_OPER | FLAGS_LOCOP);
1133 if (MyConnect(sptr)) {
1134 tmpmask = cli_snomask(sptr) & ~SNO_OPER;
1135 cli_handler(sptr) = CLIENT_HANDLER;
1140 if (what == MODE_ADD)
1143 ClearInvisible(sptr);
1146 if (what == MODE_ADD)
1152 if (what == MODE_ADD)
1153 SetChannelService(sptr);
1155 ClearChannelService(sptr);
1158 if (what == MODE_ADD)
1169 * Evaluate rules for new user mode
1170 * Stop users making themselves operators too easily:
1172 if (!IsServer(cptr)) {
1173 if (!(setflags & FLAGS_OPER) && IsOper(sptr))
1175 if (!(setflags & FLAGS_LOCOP) && IsLocOp(sptr))
1178 * new umode; servers can set it, local users cannot;
1179 * prevents users from /kick'ing or /mode -o'ing
1181 if (!(setflags & FLAGS_CHSERV))
1182 ClearChannelService(sptr);
1184 * only send wallops to opers
1186 if (feature_bool(FEAT_WALLOPS_OPER_ONLY) && !IsAnOper(sptr) &&
1187 !(setflags & FLAGS_WALLOP))
1189 #ifdef SERVNOTICE_OPER_ONLY
1190 if (MyConnect(sptr) && !IsAnOper(sptr) && !(setflags & FLAGS_SERVNOTICE)) {
1191 ClearServNotice(sptr);
1192 set_snomask(sptr, 0, SNO_SET);
1195 #ifdef DEBUG_OPER_ONLY
1196 if (!IsAnOper(sptr) && !(setflags & FLAGS_DEBUG))
1200 if (MyConnect(sptr)) {
1201 if ((setflags & (FLAGS_OPER | FLAGS_LOCOP)) && !IsAnOper(sptr))
1202 det_confs_butmask(sptr, CONF_CLIENT & ~CONF_OPS);
1204 if (SendServNotice(sptr)) {
1205 if (tmpmask != cli_snomask(sptr))
1206 set_snomask(sptr, tmpmask, SNO_SET);
1207 if (cli_snomask(sptr) && snomask_given)
1208 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
1212 * Compare new flags with old flags and send string which
1213 * will cause servers to update correctly.
1215 if (!(setflags & FLAGS_OPER) && IsOper(sptr)) { /* user now oper */
1217 client_set_privs(sptr); /* may set propagate privilege */
1219 if (HasPriv(sptr, PRIV_PROPAGATE)) /* remember propagate privilege setting */
1221 if ((setflags & FLAGS_OPER) && !IsOper(sptr)) { /* user no longer oper */
1223 client_set_privs(sptr); /* will clear propagate privilege */
1225 if ((setflags & FLAGS_INVISIBLE) && !IsInvisible(sptr))
1226 --UserStats.inv_clients;
1227 if (!(setflags & FLAGS_INVISIBLE) && IsInvisible(sptr))
1228 ++UserStats.inv_clients;
1229 send_umode_out(cptr, sptr, setflags, prop);
1235 * Build umode string for BURST command
1238 char *umode_str(struct Client *cptr)
1240 char* m = umodeBuf; /* Maximum string size: "owidg\0" */
1244 c_flags = cli_flags(cptr) & SEND_UMODES; /* cleaning up the original code */
1245 if (HasPriv(cptr, PRIV_PROPAGATE))
1246 c_flags |= FLAGS_OPER;
1248 c_flags &= ~FLAGS_OPER;
1250 for (i = 0; i < USERMODELIST_SIZE; ++i) {
1251 if ( (c_flags & userModeList[i].flag))
1252 *m++ = userModeList[i].c;
1256 return umodeBuf; /* Note: static buffer, gets
1257 overwritten by send_umode() */
1261 * Send the MODE string for user (user) to connection cptr
1264 void send_umode(struct Client *cptr, struct Client *sptr, int old, int sendmask)
1269 int what = MODE_NULL;
1272 * Build a string in umodeBuf to represent the change in the user's
1273 * mode between the new (sptr->flag) and 'old'.
1277 for (i = 0; i < USERMODELIST_SIZE; ++i) {
1278 flag = userModeList[i].flag;
1279 if (MyUser(sptr) && !(flag & sendmask))
1281 if ( (flag & old) && !(cli_flags(sptr) & flag))
1283 if (what == MODE_DEL)
1284 *m++ = userModeList[i].c;
1289 *m++ = userModeList[i].c;
1292 else if (!(flag & old) && (cli_flags(sptr) & flag))
1294 if (what == MODE_ADD)
1295 *m++ = userModeList[i].c;
1300 *m++ = userModeList[i].c;
1305 if (*umodeBuf && cptr)
1306 sendcmdto_one(sptr, CMD_MODE, cptr, "%s :%s", cli_name(sptr), umodeBuf);
1310 * Check to see if this resembles a sno_mask. It is if 1) there is
1311 * at least one digit and 2) The first digit occurs before the first
1312 * alphabetic character.
1314 int is_snomask(char *word)
1318 for (; *word; word++)
1321 else if (IsAlpha(*word))
1328 * If it begins with a +, count this as an additive mask instead of just
1329 * a replacement. If what == MODE_DEL, "+" has no special effect.
1331 unsigned int umode_make_snomask(unsigned int oldmask, char *arg, int what)
1333 unsigned int sno_what;
1334 unsigned int newmask;
1338 if (what == MODE_ADD)
1343 else if (*arg == '-')
1346 if (what == MODE_ADD)
1352 sno_what = (what == MODE_ADD) ? SNO_SET : SNO_DEL;
1353 /* pity we don't have strtoul everywhere */
1354 newmask = (unsigned int)atoi(arg);
1355 if (sno_what == SNO_DEL)
1356 newmask = oldmask & ~newmask;
1357 else if (sno_what == SNO_ADD)
1362 static void delfrom_list(struct Client *cptr, struct SLink **list)
1365 struct SLink* prv = NULL;
1367 for (tmp = *list; tmp; tmp = tmp->next) {
1368 if (tmp->value.cptr == cptr) {
1370 prv->next = tmp->next;
1381 * This function sets a Client's server notices mask, according to
1382 * the parameter 'what'. This could be even faster, but the code
1383 * gets mighty hard to read :)
1385 void set_snomask(struct Client *cptr, unsigned int newmask, int what)
1387 unsigned int oldmask, diffmask; /* unsigned please */
1391 oldmask = cli_snomask(cptr);
1393 if (what == SNO_ADD)
1395 else if (what == SNO_DEL)
1396 newmask = oldmask & ~newmask;
1397 else if (what != SNO_SET) /* absolute set, no math needed */
1398 sendto_opmask_butone(0, SNO_OLDSNO, "setsnomask called with %d ?!", what);
1400 newmask &= (IsAnOper(cptr) ? SNO_ALL : SNO_USER);
1402 diffmask = oldmask ^ newmask;
1404 for (i = 0; diffmask >> i; i++) {
1405 if (((diffmask >> i) & 1))
1407 if (((newmask >> i) & 1))
1410 tmp->next = opsarray[i];
1411 tmp->value.cptr = cptr;
1415 /* not real portable :( */
1416 delfrom_list(cptr, &opsarray[i]);
1419 cli_snomask(cptr) = newmask;
1423 * is_silenced : Does the actual check wether sptr is allowed
1424 * to send a message to acptr.
1425 * Both must be registered persons.
1426 * If sptr is silenced by acptr, his message should not be propagated,
1427 * but more over, if this is detected on a server not local to sptr
1428 * the SILENCE mask is sent upstream.
1430 int is_silenced(struct Client *sptr, struct Client *acptr)
1434 static char sender[HOSTLEN + NICKLEN + USERLEN + 5];
1435 static char senderip[16 + NICKLEN + USERLEN + 5];
1437 if (!cli_user(acptr) || !(lp = cli_user(acptr)->silence) || !(user = cli_user(sptr)))
1439 sprintf_irc(sender, "%s!%s@%s", cli_name(sptr), user->username, user->host);
1440 sprintf_irc(senderip, "%s!%s@%s", cli_name(sptr), user->username,
1441 ircd_ntoa((const char*) &(cli_ip(sptr))));
1442 for (; lp; lp = lp->next)
1444 if ((!(lp->flags & CHFL_SILENCE_IPMASK) && !match(lp->value.cp, sender)) ||
1445 ((lp->flags & CHFL_SILENCE_IPMASK) && !match(lp->value.cp, senderip)))
1447 if (!MyConnect(sptr))
1449 sendcmdto_one(acptr, CMD_SILENCE, cli_from(sptr), "%C %s", sptr,
1461 * Removes all silence masks from the list of sptr that fall within `mask'
1462 * Returns -1 if none where found, 0 otherwise.
1464 int del_silence(struct Client *sptr, char *mask)
1470 for (lp = &(cli_user(sptr))->silence; *lp;) {
1471 if (!mmatch(mask, (*lp)->value.cp))
1475 MyFree(tmp->value.cp);
1485 int add_silence(struct Client* sptr, const char* mask)
1487 struct SLink *lp, **lpp;
1488 int cnt = 0, len = strlen(mask);
1491 for (lpp = &(cli_user(sptr))->silence, lp = *lpp; lp;)
1493 if (0 == ircd_strcmp(mask, lp->value.cp))
1495 if (!mmatch(mask, lp->value.cp))
1497 struct SLink *tmp = lp;
1498 *lpp = lp = lp->next;
1499 MyFree(tmp->value.cp);
1505 len += strlen(lp->value.cp);
1506 if ((len > (feature_int(FEAT_AVBANLEN) * feature_int(FEAT_MAXSILES))) ||
1507 (++cnt >= feature_int(FEAT_MAXSILES)))
1509 send_reply(sptr, ERR_SILELISTFULL, mask);
1512 else if (!mmatch(lp->value.cp, mask))
1519 memset(lp, 0, sizeof(struct SLink));
1520 lp->next = cli_user(sptr)->silence;
1521 lp->value.cp = (char*) MyMalloc(strlen(mask) + 1);
1522 assert(0 != lp->value.cp);
1523 strcpy(lp->value.cp, mask);
1524 if ((ip_start = strrchr(mask, '@')) && check_if_ipmask(ip_start + 1))
1525 lp->flags = CHFL_SILENCE_IPMASK;
1526 cli_user(sptr)->silence = lp;