2 * IRC - Internet Relay Chat, ircd/s_user.c (formerly ircd/s_msg.c)
3 * Copyright (C) 1990 Jarkko Oikarinen and
4 * University of Oulu, Computing Center
6 * See file AUTHORS in IRC package for additional names of
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 1, or (at your option)
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
33 #include "ircd_alloc.h"
34 #include "ircd_chattr.h"
36 #include "ircd_reply.h"
37 #include "ircd_string.h"
44 #include "querycmds.h"
50 #include "s_serv.h" /* max_client_count */
52 #include "sprintf_irc.h"
55 #include "supported.h"
61 #include "handlers.h" /* m_motd and m_lusers */
71 static int userCount = 0;
74 * 'make_user' add's an User information block to a client
75 * if it was not previously allocated.
77 struct User *make_user(struct Client *cptr)
82 cptr->user = (struct User*) MyMalloc(sizeof(struct User));
83 assert(0 != cptr->user);
85 /* All variables are 0 by default */
86 memset(cptr->user, 0, sizeof(struct User));
90 cptr->user->refcnt = 1;
98 * Decrease user reference count by one and release block, if count reaches 0.
100 void free_user(struct User* user)
103 assert(0 < user->refcnt);
105 if (--user->refcnt == 0) {
111 assert(0 == user->joined);
112 assert(0 == user->invited);
113 assert(0 == user->channel);
122 void user_count_memory(size_t* count_out, size_t* bytes_out)
124 assert(0 != count_out);
125 assert(0 != bytes_out);
126 *count_out = userCount;
127 *bytes_out = userCount * sizeof(struct User);
131 * user_set_away - set user away state
132 * returns 1 if client is away or changed away message, 0 if
133 * client is removing away status.
134 * NOTE: this function may modify user and message, so they
137 int user_set_away(struct User* user, char* message)
144 if (EmptyString(message)) {
146 * Marking as not away
157 unsigned int len = strlen(message);
159 if (len > TOPICLEN) {
160 message[TOPICLEN] = '\0';
164 away = (char*) MyRealloc(away, len + 1);
166 away = (char*) MyMalloc(len + 1);
170 strcpy(away, message);
172 return (user->away != 0);
178 * Local function to find the next matching client. The search
179 * can be continued from the specified client entry. Normal
182 * for (x = client; x = next_client(x,mask); x = x->next)
183 * HandleMatchingClient;
186 struct Client *next_client(struct Client *next, const char* ch)
188 struct Client *tmp = next;
193 next = FindClient(ch);
194 next = next ? next : tmp;
195 if (tmp->prev == next)
199 for (; next; next = next->next)
200 if (!match(ch, next->name))
208 * Do the basic thing in delivering the message (command)
209 * across the relays to the specific server (server) for
212 * Note: The command is a format string and *MUST* be
213 * of prefixed style (e.g. ":%s COMMAND %s ...").
214 * Command can have only max 8 parameters.
216 * server parv[server] is the parameter identifying the
220 * parv[server] is replaced with the pointer to the
221 * real servername from the matched client (I'm lazy
224 * returns: (see #defines)
226 int hunt_server(int MustBeOper, struct Client *cptr, struct Client *sptr, char *command,
227 int server, int parc, char *parv[])
229 struct Client *acptr;
232 /* Assume it's me, if no server or an unregistered client */
233 if (parc <= server || EmptyString(parv[server]) || IsUnknown(sptr))
234 return (HUNTED_ISME);
236 /* Make sure it's a server */
237 if (MyUser(sptr) || Protocol(cptr) < 10)
239 /* Make sure it's a server */
240 if (!strchr(parv[server], '*')) {
241 if (0 == (acptr = FindClient(parv[server])))
242 return HUNTED_NOSUCH;
244 acptr = acptr->user->server;
246 else if (!(acptr = find_match_server(parv[server])))
248 sendto_one(sptr, err_str(ERR_NOSUCHSERVER),
249 me.name, parv[0], parv[server]);
250 return (HUNTED_NOSUCH);
253 else if (!(acptr = FindNServer(parv[server])))
254 return (HUNTED_NOSUCH); /* Server broke off in the meantime */
257 return (HUNTED_ISME);
259 if (MustBeOper && !IsPrivileged(sptr))
261 sendto_one(sptr, err_str(ERR_NOPRIVILEGES), me.name, sptr->name);
262 return HUNTED_NOSUCH;
265 strcpy(y, acptr->yxx);
268 assert(!IsServer(sptr));
269 sendto_one(acptr, command, NumNick(sptr), parv[1], parv[2], parv[3], parv[4],
270 parv[5], parv[6], parv[7], parv[8]);
272 return (HUNTED_PASS);
276 * 'do_nick_name' ensures that the given parameter (nick) is really a proper
277 * string for a nickname (note, the 'nick' may be modified in the process...)
279 * RETURNS the length of the final NICKNAME (0, if nickname is invalid)
281 * Nickname characters are in range 'A'..'}', '_', '-', '0'..'9'
282 * anything outside the above set will terminate nickname.
283 * In addition, the first character cannot be '-' or a Digit.
286 * The '~'-character should be allowed, but a change should be global,
287 * some confusion would result if only few servers allowed it...
289 int do_nick_name(char* nick)
292 char* end = ch + NICKLEN;
295 if (*ch == '-' || IsDigit(*ch)) /* first character in [0..9-] */
298 for ( ; (ch < end) && *ch; ++ch)
299 if (!IsNickChar(*ch))
310 * Copy `source' to `dest', replacing all occurances of '~' and characters that
311 * are not `isIrcUi' by an underscore.
312 * Copies at most USERLEN - 1 characters or up till the first control character.
313 * If `tilde' is true, then a tilde is prepended to `dest'.
314 * Note that `dest' and `source' can point to the same area or to different
315 * non-overlapping areas.
317 static char *clean_user_id(char *dest, char *source, int tilde)
324 ch = *s++; /* Store first character to copy: */
327 *d++ = '~'; /* If `dest' == `source', then this overwrites `ch' */
330 while (ch && !IsCntrl(ch) && rlen--)
332 char nch = *s++; /* Store next character to copy */
333 *d++ = IsUserChar(ch) ? ch : '_'; /* This possibly overwrites it */
346 * This function is called when both NICK and USER messages
347 * have been accepted for the client, in whatever order. Only
348 * after this the USER message is propagated.
350 * NICK's must be propagated at once when received, although
351 * it would be better to delay them too until full info is
352 * available. Doing it is not so simple though, would have
353 * to implement the following:
355 * 1) user telnets in and gives only "NICK foobar" and waits
356 * 2) another user far away logs in normally with the nick
357 * "foobar" (quite legal, as this server didn't propagate it).
358 * 3) now this server gets nick "foobar" from outside, but
359 * has already the same defined locally. Current server
360 * would just issue "KILL foobar" to clean out dups. But,
361 * this is not fair. It should actually request another
362 * nick from local user or kill him/her...
364 int register_user(struct Client *cptr, struct Client *sptr,
365 const char *nick, char *username)
367 struct ConfItem* aconf;
371 char c = 0; /* not alphanum */
372 char d = 'a'; /* not a digit */
380 short digitgroups = 0;
381 struct User* user = sptr->user;
383 char featurebuf[512];
386 user->last = CurrentTime;
387 parv[0] = sptr->name;
388 parv[1] = parv[2] = NULL;
392 static time_t last_too_many1;
393 static time_t last_too_many2;
395 assert(cptr == sptr);
396 switch (conf_check_client(sptr))
400 case ACR_NO_AUTHORIZATION:
401 sendto_op_mask(SNO_UNAUTH, "Unauthorized connection from %s.",
402 get_client_name(sptr, HIDE_IP));
403 ++ServerStats->is_ref;
404 return exit_client(cptr, sptr, &me,
405 "No Authorization - use another server");
406 case ACR_TOO_MANY_IN_CLASS:
407 if (CurrentTime - last_too_many1 >= (time_t) 60)
409 last_too_many1 = CurrentTime;
410 sendto_op_mask(SNO_TOOMANY, "Too many connections in class for %s.",
411 get_client_name(sptr, HIDE_IP));
413 ++ServerStats->is_ref;
414 IPcheck_connect_fail(sptr->ip);
415 return exit_client(cptr, sptr, &me,
416 "Sorry, your connection class is full - try again later or try another server");
417 case ACR_TOO_MANY_FROM_IP:
418 if (CurrentTime - last_too_many2 >= (time_t) 60)
420 last_too_many2 = CurrentTime;
421 sendto_op_mask(SNO_TOOMANY, "Too many connections from same IP for %s.",
422 get_client_name(sptr, HIDE_IP));
424 ++ServerStats->is_ref;
425 return exit_client(cptr, sptr, &me,
426 "Too many connections from your host");
427 case ACR_ALREADY_AUTHORIZED:
428 /* Can this ever happen? */
430 ++ServerStats->is_ref;
431 IPcheck_connect_fail(sptr->ip);
432 return exit_client(cptr, sptr, &me, "Unknown error -- Try again");
434 ircd_strncpy(user->host, sptr->sockhost, HOSTLEN);
435 aconf = sptr->confs->value.aconf;
437 clean_user_id(user->username,
438 (sptr->flags & FLAGS_GOTID) ? sptr->username : username,
439 (sptr->flags & FLAGS_DOID) && !(sptr->flags & FLAGS_GOTID));
441 if ((user->username[0] == '\0')
442 || ((user->username[0] == '~') && (user->username[1] == '\000')))
443 return exit_client(cptr, sptr, &me, "USER: Bogus userid.");
445 if (!EmptyString(aconf->passwd)
446 && !(IsDigit(*aconf->passwd) && !aconf->passwd[1])
448 && strcmp("ONE", aconf->passwd)
450 && strcmp(sptr->passwd, aconf->passwd))
452 ServerStats->is_ref++;
453 IPcheck_connect_fail(sptr->ip);
454 sendto_one(sptr, err_str(ERR_PASSWDMISMATCH), me.name, parv[0]);
455 return exit_client(cptr, sptr, &me, "Bad Password");
457 memset(sptr->passwd, 0, sizeof(sptr->passwd));
459 * following block for the benefit of time-dependent K:-lines
461 if (find_kill(sptr)) {
462 ServerStats->is_ref++;
463 IPcheck_connect_fail(sptr->ip);
464 return exit_client(cptr, sptr, &me, "K-lined");
467 * Check for mixed case usernames, meaning probably hacked. Jon2 3-94
468 * Summary of rules now implemented in this patch: Ensor 11-94
469 * In a mixed-case name, if first char is upper, one more upper may
470 * appear anywhere. (A mixed-case name *must* have an upper first
471 * char, and may have one other upper.)
472 * A third upper may appear if all 3 appear at the beginning of the
473 * name, separated only by "others" (-/_/.).
474 * A single group of digits is allowed anywhere.
475 * Two groups of digits are allowed if at least one of the groups is
476 * at the beginning or the end.
477 * Only one '-', '_', or '.' is allowed (or two, if not consecutive).
478 * But not as the first or last char.
479 * No other special characters are allowed.
480 * Name must contain at least one letter.
482 tmpstr2 = tmpstr = (username[0] == '~' ? &username[1] : username);
483 while (*tmpstr && !badid)
495 if ((leadcaps || pos == 1) && !lower && !digits)
501 if (pos == 1 || !IsDigit(d))
508 else if (c == '-' || c == '_' || c == '.')
513 else if (d == '-' || d == '_' || d == '.' || other > 2)
522 if (lower && upper && (!leadcaps || leadcaps > 3 ||
523 (upper > 2 && upper > leadcaps)))
525 else if (digitgroups == 2 && !(IsDigit(tmpstr2[0]) || IsDigit(c)))
527 else if ((!lower && !upper) || !IsAlnum(c))
530 if (badid && (!(sptr->flags & FLAGS_GOTID) ||
531 strcmp(sptr->username, username) != 0))
533 ServerStats->is_ref++;
534 sendto_one(cptr, ":%s %d %s :Your username is invalid.",
535 me.name, ERR_INVALIDUSERNAME, cptr->name);
537 ":%s %d %s :Connect with your real username, in lowercase.",
538 me.name, ERR_INVALIDUSERNAME, cptr->name);
539 sendto_one(cptr, ":%s %d %s :If your mail address were foo@bar.com, "
540 "your username would be foo.",
541 me.name, ERR_INVALIDUSERNAME, cptr->name);
542 return exit_client(cptr, sptr, &me, "USER: Bad username");
544 Count_unknownbecomesclient(sptr, UserStats);
547 ircd_strncpy(user->username, username, USERLEN);
548 Count_newremoteclient(UserStats, user->server);
549 if ((gline = gline_lookup(sptr)) && GlineIsActive(gline))
550 gline_resend(cptr, gline);
554 if (IsInvisible(sptr))
555 ++UserStats.inv_clients;
559 if (MyConnect(sptr)) {
560 sptr->handler = CLIENT_HANDLER;
561 release_dns_reply(sptr);
563 sendto_one(sptr, rpl_str(RPL_WELCOME), me.name, nick, nick);
565 * This is a duplicate of the NOTICE but see below...
567 sendto_one(sptr, rpl_str(RPL_YOURHOST), me.name, nick,
569 sendto_one(sptr, rpl_str(RPL_CREATED), me.name, nick, creation);
570 sendto_one(sptr, rpl_str(RPL_MYINFO), me.name, parv[0], me.name, version);
571 sprintf_irc(featurebuf,FEATURES,FEATURESVALUES);
572 sendto_one(sptr, rpl_str(RPL_ISUPPORT), me.name, nick, featurebuf);
573 m_lusers(sptr, sptr, 1, parv);
576 m_motd(sptr, NULL, 1, parv);
578 m_motd(sptr, sptr, 1, parv);
580 nextping = CurrentTime;
581 if (sptr->snomask & SNO_NOISY)
582 set_snomask(sptr, sptr->snomask & SNO_NOISY, SNO_ADD);
583 #ifdef ALLOW_SNO_CONNEXIT
584 #ifdef SNO_CONNEXIT_IP
586 ":%s NOTICE * :*** Notice -- Client connecting: %s (%s@%s) [%s] {%d}",
587 me.name, nick, user->username, user->host, cptr->sock_ip,
588 get_client_class(sptr));
589 sendbufto_op_mask(SNO_CONNEXIT);
590 #else /* SNO_CONNEXIT_IP */
592 ":%s NOTICE * :*** Notice -- Client connecting: %s (%s@%s)",
593 me.name, nick, user->username, user->host);
594 sendbufto_op_mask(SNO_CONNEXIT);
595 #endif /* SNO_CONNEXIT_IP */
596 #endif /* ALLOW_SNO_CONNEXIT */
597 IPcheck_connect_succeeded(sptr);
600 /* if (IsServer(cptr)) */
602 struct Client *acptr;
604 acptr = user->server;
605 if (acptr->from != sptr->from)
607 sendto_one(cptr, "%s " TOK_KILL " %s%s :%s (%s != %s[%s])",
608 NumServ(&me), NumNick(sptr), me.name, user->server->name,
609 acptr->from->name, acptr->from->sockhost);
610 sptr->flags |= FLAGS_KILLED;
611 return exit_client(cptr, sptr, &me, "NICK server wrong direction");
614 sptr->flags |= (acptr->flags & FLAGS_TS8);
617 * Check to see if this user is being propogated
618 * as part of a net.burst, or is using protocol 9.
619 * FIXME: This can be speeded up - its stupid to check it for
620 * every NICK message in a burst again --Run.
622 for (acptr = user->server; acptr != &me; acptr = acptr->serv->up) {
623 if (IsBurst(acptr) || Protocol(acptr) < 10)
626 if (!IPcheck_remote_connect(sptr, (acptr != &me)))
628 * We ran out of bits to count this
630 return exit_client(cptr, sptr, &me, "More than 255 connections from this address");
633 tmpstr = umode_str(sptr);
634 sendto_serv_butone(cptr, *tmpstr ?
635 "%s " TOK_NICK " %s %d %d %s %s +%s %s %s%s :%s" :
636 "%s " TOK_NICK " %s %d %d %s %s %s%s %s%s :%s",
637 NumServ(user->server), nick, sptr->hopcount + 1, sptr->lastnick,
638 user->username, user->host, tmpstr,
639 inttobase64(ip_base64, ntohl(sptr->ip.s_addr), 6),
640 NumNick(sptr), sptr->info);
642 /* Send umode to client */
645 send_umode(cptr, sptr, 0, ALL_UMODES);
646 if (sptr->snomask != SNO_DEFAULT && (sptr->flags & FLAGS_SERVNOTICE))
647 sendto_one(sptr, rpl_str(RPL_SNOMASK), me.name, sptr->name,
648 sptr->snomask, sptr->snomask);
655 static const struct UserMode {
660 { FLAGS_LOCOP, 'O' },
661 { FLAGS_INVISIBLE, 'i' },
662 { FLAGS_WALLOP, 'w' },
663 { FLAGS_SERVNOTICE, 's' },
665 { FLAGS_CHSERV, 'k' },
669 #define USERMODELIST_SIZE sizeof(userModeList) / sizeof(struct UserMode)
672 static int user_modes[] = {
675 FLAGS_INVISIBLE, 'i',
677 FLAGS_SERVNOTICE, 's',
686 * XXX - find a way to get rid of this
688 static char umodeBuf[BUFSIZE];
690 int set_nick_name(struct Client* cptr, struct Client* sptr,
691 const char* nick, int parc, char* parv[])
693 if (IsServer(sptr)) {
698 * A server introducing a new client, change source
700 struct Client* new_client = make_client(cptr, STAT_UNKNOWN);
701 assert(0 != new_client);
703 new_client->hopcount = atoi(parv[2]);
704 new_client->lastnick = atoi(parv[3]);
705 if (Protocol(cptr) > 9 && parc > 7 && *parv[6] == '+') {
706 for (p = parv[6] + 1; *p; p++) {
707 for (i = 0; i < USERMODELIST_SIZE; ++i) {
708 if (userModeList[i].c == *p) {
709 new_client->flags |= userModeList[i].flag;
718 strcpy(new_client->name, nick);
719 new_client->user = make_user(new_client);
720 new_client->user->server = sptr;
721 SetRemoteNumNick(new_client, parv[parc - 2]);
723 * IP# of remote client
725 new_client->ip.s_addr = htonl(base64toint(parv[parc - 3]));
727 add_client_to_list(new_client);
728 hAddClient(new_client);
730 sptr->serv->ghost = 0; /* :server NICK means end of net.burst */
731 ircd_strncpy(new_client->username, parv[4], USERLEN);
732 ircd_strncpy(new_client->user->host, parv[5], HOSTLEN);
733 ircd_strncpy(new_client->info, parv[parc - 1], REALLEN);
734 return register_user(cptr, new_client, new_client->name, parv[4]);
736 else if (sptr->name[0]) {
738 * Client changing its nick
740 * If the client belongs to me, then check to see
741 * if client is on any channels where it is currently
742 * banned. If so, do not allow the nick change to occur.
745 const char* channel_name;
746 if ((channel_name = find_no_nickchange_channel(sptr))) {
747 sendto_one(cptr, err_str(ERR_BANNICKCHANGE), me.name, parv[0],
752 * Refuse nick change if the last nick change was less
753 * then 30 seconds ago. This is intended to get rid of
754 * clone bots doing NICK FLOOD. -SeKs
755 * If someone didn't change their nick for more then 60 seconds
756 * however, allow to do two nick changes immedately after another
757 * before limiting the nick flood. -Run
759 if (CurrentTime < cptr->nextnick) {
761 sendto_one(cptr, err_str(ERR_NICKTOOFAST),
762 me.name, parv[0], parv[1], cptr->nextnick - CurrentTime);
763 /* Send error message */
764 sendto_prefix_one(cptr, cptr, ":%s NICK %s", parv[0], parv[0]);
765 /* bounce NICK to user */
766 return 0; /* ignore nick change! */
769 /* Limit total to 1 change per NICK_DELAY seconds: */
770 cptr->nextnick += NICK_DELAY;
771 /* However allow _maximal_ 1 extra consecutive nick change: */
772 if (cptr->nextnick < CurrentTime)
773 cptr->nextnick = CurrentTime;
777 * Also set 'lastnick' to current time, if changed.
779 if (0 != ircd_strcmp(parv[0], nick))
780 sptr->lastnick = (sptr == cptr) ? TStime() : atoi(parv[2]);
783 * Client just changing his/her nick. If he/she is
784 * on a channel, send note of change to all clients
785 * on that channel. Propagate notice to other servers.
788 sendto_common_channels(sptr, ":%s NICK :%s", parv[0], nick);
789 add_history(sptr, 1);
790 sendto_serv_butone(cptr,
791 "%s%s " TOK_NICK " %s " TIME_T_FMT, NumNick(sptr), nick, sptr->lastnick);
794 sendto_one(sptr, ":%s NICK :%s", parv[0], nick);
798 strcpy(sptr->name, nick);
802 /* Local client setting NICK the first time */
804 strcpy(sptr->name, nick);
806 sptr->user = make_user(sptr);
807 sptr->user->server = &me;
809 SetLocalNumNick(sptr);
813 * If the client hasn't gotten a cookie-ping yet,
814 * choose a cookie and send it. -record!jegelhof@cloud9.net
818 sptr->cookie = (ircrandom() & 0x7fffffff);
819 } while (!sptr->cookie);
820 sendto_one(cptr, "PING :%u", sptr->cookie);
822 else if (*sptr->user->host && sptr->cookie == COOKIE_VERIFIED) {
824 * USER and PONG already received, now we have NICK.
825 * register_user may reject the client and call exit_client
826 * for it - must test this and exit m_nick too !
828 sptr->lastnick = TStime(); /* Always local client */
829 if (register_user(cptr, sptr, nick, sptr->user->username) == CPTR_KILLED)
836 static unsigned char hash_target(unsigned int target)
838 return (unsigned char) (target >> 16) ^ (target >> 8);
844 * sptr must be a local client!
846 * Cannonifies target for client `sptr'.
848 void add_target(struct Client *sptr, void *target)
850 unsigned char hash = hash_target((unsigned int) target);
851 unsigned char* targets;
856 targets = sptr->targets;
860 for (i = 0; i < MAXTARGETS; ++i) {
861 if (targets[i] == hash)
867 memmove(&targets[RESERVEDTARGETS + 1],
868 &targets[RESERVEDTARGETS], MAXTARGETS - RESERVEDTARGETS - 1);
869 targets[RESERVEDTARGETS] = hash;
875 * sptr must be a local client !
877 * Returns 'true' (1) when too many targets are addressed.
878 * Returns 'false' (0) when it's ok to send to this target.
880 int check_target_limit(struct Client *sptr, void *target, const char *name,
883 unsigned char hash = hash_target((unsigned int) target);
885 unsigned char* targets;
889 targets = sptr->targets;
892 * Same target as last time?
894 if (targets[0] == hash)
896 for (i = 1; i < MAXTARGETS; ++i) {
897 if (targets[i] == hash) {
898 memmove(&targets[1], &targets[0], i);
907 if (CurrentTime < sptr->nexttarget) {
908 if (sptr->nexttarget - CurrentTime < TARGET_DELAY + 8) {
912 sptr->nexttarget += 2;
913 sendto_one(sptr, err_str(ERR_TARGETTOOFAST),
914 me.name, sptr->name, name, sptr->nexttarget - CurrentTime);
920 sendto_one(sptr, ":%s NOTICE %s :New target: %s; ft " TIME_T_FMT,
921 me.name, sptr->name, name, (CurrentTime - sptr->nexttarget) / TARGET_DELAY);
923 sptr->nexttarget += TARGET_DELAY;
924 if (sptr->nexttarget < CurrentTime - (TARGET_DELAY * (MAXTARGETS - 1)))
925 sptr->nexttarget = CurrentTime - (TARGET_DELAY * (MAXTARGETS - 1));
928 memmove(&targets[1], &targets[0], MAXTARGETS - 1);
934 * whisper - called from m_cnotice and m_cprivmsg.
936 * parv[0] = sender prefix
939 * parv[3] = Private message text
941 * Added 971023 by Run.
942 * Reason: Allows channel operators to sent an arbitrary number of private
943 * messages to users on their channel, avoiding the max.targets limit.
944 * Building this into m_private would use too much cpu because we'd have
945 * to a cross channel lookup for every private message!
946 * Note that we can't allow non-chan ops to use this command, it would be
947 * abused by mass advertisers.
950 int whisper(struct Client* source, const char* nick, const char* channel,
951 const char* text, int is_notice)
954 struct Channel* chptr;
955 struct Membership* membership;
959 assert(0 != channel);
960 assert(MyUser(source));
962 if (!(dest = FindUser(nick))) {
963 sendto_one(source, err_str(ERR_NOSUCHNICK), me.name, source->name, nick);
966 if (!(chptr = FindChannel(channel))) {
967 sendto_one(source, err_str(ERR_NOSUCHCHANNEL), me.name, source->name, channel);
971 * compare both users channel lists, instead of the channels user list
972 * since the link is the same, this should be a little faster for channels
973 * with a lot of users
975 for (membership = source->user->channel; membership; membership = membership->next_channel) {
976 if (chptr == membership->channel)
979 if (0 == membership) {
980 sendto_one(source, err_str(ERR_NOTONCHANNEL), me.name, source->name, chptr->chname);
983 if (!IsVoicedOrOpped(membership)) {
984 sendto_one(source, err_str(ERR_VOICENEEDED), me.name, source->name, chptr->chname);
988 * lookup channel in destination
990 assert(0 != dest->user);
991 for (membership = dest->user->channel; membership; membership = membership->next_channel) {
992 if (chptr == membership->channel)
995 if (0 == membership || IsZombie(membership)) {
996 sendto_one(source, err_str(ERR_USERNOTINCHANNEL), me.name,
997 source->name, dest->name, chptr->chname);
1000 if (is_silenced(source, dest))
1003 if (dest->user->away)
1004 sendto_one(source, rpl_str(RPL_AWAY), me.name, source->name,
1005 dest->name, dest->user->away);
1007 sendto_prefix_one(dest, source, ":%s %s %s :%s",
1008 source->name, is_notice ? MSG_NOTICE : MSG_PRIVATE,
1011 sendto_one(dest, "%s%s %s %s%s :%s",
1012 NumNick(source), is_notice ? TOK_NOTICE : TOK_PRIVATE,
1013 NumNick(dest), text);
1019 * added Sat Jul 25 07:30:42 EST 1992
1021 void send_umode_out(struct Client *cptr, struct Client *sptr, int old)
1024 struct Client *acptr;
1026 send_umode(NULL, sptr, old, SEND_UMODES);
1028 for (i = HighestFd; i >= 0; i--) {
1029 if ((acptr = LocalClientArray[i]) && IsServer(acptr) &&
1030 (acptr != cptr) && (acptr != sptr) && *umodeBuf)
1031 sendto_one(acptr, "%s%s " TOK_MODE " %s :%s", NumNick(sptr), sptr->name, umodeBuf);
1033 if (cptr && MyUser(cptr))
1034 send_umode(cptr, sptr, old, ALL_UMODES);
1039 * send_user_info - send user info userip/userhost
1040 * NOTE: formatter must put info into buffer and return a pointer to the end of
1041 * the data it put in the buffer.
1043 void send_user_info(struct Client* sptr, char* names, int rpl, InfoFormatter fmt)
1049 int users_found = 0;
1050 struct Client* acptr;
1051 char buf[BUFSIZE * 2];
1057 sbuf = sprintf_irc(buf, rpl_str(rpl), me.name, sptr->name);
1059 for (name = ircd_strtok(&p, names, " "); name; name = ircd_strtok(&p, 0, " ")) {
1060 if ((acptr = FindUser(name))) {
1063 sbuf = (*fmt)(acptr, sbuf);
1065 if (5 == ++arg_count)
1069 send_buffer(sptr, buf);
1074 * set_user_mode() added 15/10/91 By Darren Reed.
1077 * parv[1] - username to change mode for
1078 * parv[2] - modes to change
1080 int set_user_mode(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
1084 struct Client *acptr;
1088 unsigned int tmpmask = 0;
1089 int snomask_given = 0;
1095 return need_more_params(sptr, "MODE");
1097 if (!(acptr = FindUser(parv[1])))
1099 if (MyConnect(sptr))
1100 sendto_one(sptr, err_str(ERR_NOSUCHCHANNEL), me.name, parv[0], parv[1]);
1104 if (IsServer(sptr) || sptr != acptr)
1107 sendto_ops_butone(NULL, &me, ":%s WALLOPS :MODE for User %s From %s!%s",
1108 me.name, parv[1], cptr->name, sptr->name);
1110 sendto_one(sptr, err_str(ERR_USERSDONTMATCH), me.name, parv[0]);
1118 for (i = 0; i < USERMODELIST_SIZE; ++i) {
1119 if ( (userModeList[i].flag & sptr->flags))
1120 *m++ = userModeList[i].c;
1123 sendto_one(sptr, rpl_str(RPL_UMODEIS), me.name, parv[0], buf);
1124 if ((sptr->flags & FLAGS_SERVNOTICE) && MyConnect(sptr)
1126 (unsigned int)(IsOper(sptr) ? SNO_OPERDEFAULT : SNO_DEFAULT))
1127 sendto_one(sptr, rpl_str(RPL_SNOMASK), me.name, parv[0], sptr->snomask,
1133 * find flags already set for user
1134 * why not just copy them?
1136 setflags = sptr->flags;
1139 for (i = 0; i < USERMODELIST_SIZE; ++i) {
1140 if (sptr->flags & userModeList[i].flag)
1141 setflags |= userModeList[i].flag;
1144 if (MyConnect(sptr))
1145 tmpmask = sptr->snomask;
1148 * parse mode change string(s)
1150 for (p = &parv[2]; *p; p++) { /* p is changed in loop too */
1151 for (m = *p; *m; m++) {
1160 if (*(p + 1) && is_snomask(*(p + 1))) {
1162 tmpmask = umode_make_snomask(tmpmask, *++p, what);
1163 tmpmask &= (IsAnOper(sptr) ? SNO_ALL : SNO_USER);
1166 tmpmask = (what == MODE_ADD) ?
1167 (IsAnOper(sptr) ? SNO_OPERDEFAULT : SNO_DEFAULT) : 0;
1169 sptr->flags |= FLAGS_SERVNOTICE;
1171 sptr->flags &= ~FLAGS_SERVNOTICE;
1174 if (what == MODE_ADD)
1180 if (what == MODE_ADD)
1183 sptr->flags &= ~(FLAGS_OPER | FLAGS_LOCOP);
1184 if (MyConnect(sptr)) {
1185 tmpmask = sptr->snomask & ~SNO_OPER;
1186 sptr->handler = CLIENT_HANDLER;
1191 if (what == MODE_ADD)
1194 sptr->flags &= ~(FLAGS_OPER | FLAGS_LOCOP);
1195 if (MyConnect(sptr)) {
1196 tmpmask = sptr->snomask & ~SNO_OPER;
1197 sptr->handler = CLIENT_HANDLER;
1202 if (what == MODE_ADD)
1205 ClearInvisible(sptr);
1208 if (what == MODE_ADD)
1214 if (what == MODE_ADD)
1215 SetChannelService(sptr);
1217 ClearChannelService(sptr);
1220 if (what == MODE_ADD)
1231 * Evaluate rules for new user mode
1232 * Stop users making themselves operators too easily:
1234 if (!(setflags & FLAGS_OPER) && IsOper(sptr) && !IsServer(cptr))
1236 if (!(setflags & FLAGS_LOCOP) && IsLocOp(sptr) && !IsServer(cptr))
1238 #ifdef WALLOPS_OPER_ONLY
1240 * only send wallops to opers
1242 if (!IsAnOper(sptr) && !(setflags & FLAGS_WALLOP) && !IsServer(cptr))
1245 if ((setflags & (FLAGS_OPER | FLAGS_LOCOP)) && !IsAnOper(sptr) &&
1247 det_confs_butmask(sptr, CONF_CLIENT & ~CONF_OPS);
1249 * new umode; servers can set it, local users cannot;
1250 * prevents users from /kick'ing or /mode -o'ing
1252 if (!(setflags & FLAGS_CHSERV) && !IsServer(cptr))
1253 ClearChannelService(sptr);
1255 * Compare new flags with old flags and send string which
1256 * will cause servers to update correctly.
1258 if ((setflags & FLAGS_OPER) && !IsOper(sptr))
1260 if (!(setflags & FLAGS_OPER) && IsOper(sptr))
1262 if ((setflags & FLAGS_INVISIBLE) && !IsInvisible(sptr))
1263 --UserStats.inv_clients;
1264 if (!(setflags & FLAGS_INVISIBLE) && IsInvisible(sptr))
1265 ++UserStats.inv_clients;
1266 send_umode_out(cptr, sptr, setflags);
1268 if (MyConnect(sptr)) {
1269 if (tmpmask != sptr->snomask)
1270 set_snomask(sptr, tmpmask, SNO_SET);
1271 if (sptr->snomask && snomask_given)
1272 sendto_one(sptr, rpl_str(RPL_SNOMASK), me.name, sptr->name,
1273 sptr->snomask, sptr->snomask);
1280 * Build umode string for BURST command
1283 char *umode_str(struct Client *cptr)
1285 char* m = umodeBuf; /* Maximum string size: "owidg\0" */
1289 c_flags = cptr->flags & SEND_UMODES; /* cleaning up the original code */
1291 for (i = 0; i < USERMODELIST_SIZE; ++i) {
1292 if ( (c_flags & userModeList[i].flag))
1293 *m++ = userModeList[i].c;
1297 return umodeBuf; /* Note: static buffer, gets
1298 overwritten by send_umode() */
1302 * Send the MODE string for user (user) to connection cptr
1305 void send_umode(struct Client *cptr, struct Client *sptr, int old, int sendmask)
1310 int what = MODE_NULL;
1313 * Build a string in umodeBuf to represent the change in the user's
1314 * mode between the new (sptr->flag) and 'old'.
1318 for (i = 0; i < USERMODELIST_SIZE; ++i) {
1319 flag = userModeList[i].flag;
1320 if (MyUser(sptr) && !(flag & sendmask))
1322 if ( (flag & old) && !(sptr->flags & flag))
1324 if (what == MODE_DEL)
1325 *m++ = userModeList[i].c;
1330 *m++ = userModeList[i].c;
1333 else if (!(flag & old) && (sptr->flags & flag))
1335 if (what == MODE_ADD)
1336 *m++ = userModeList[i].c;
1341 *m++ = userModeList[i].c;
1346 if (*umodeBuf && cptr)
1347 sendto_one(cptr, ":%s MODE %s :%s", sptr->name, sptr->name, umodeBuf);
1351 * Check to see if this resembles a sno_mask. It is if 1) there is
1352 * at least one digit and 2) The first digit occurs before the first
1353 * alphabetic character.
1355 int is_snomask(char *word)
1359 for (; *word; word++)
1362 else if (IsAlpha(*word))
1369 * If it begins with a +, count this as an additive mask instead of just
1370 * a replacement. If what == MODE_DEL, "+" has no special effect.
1372 unsigned int umode_make_snomask(unsigned int oldmask, char *arg, int what)
1374 unsigned int sno_what;
1375 unsigned int newmask;
1379 if (what == MODE_ADD)
1384 else if (*arg == '-')
1387 if (what == MODE_ADD)
1393 sno_what = (what == MODE_ADD) ? SNO_SET : SNO_DEL;
1394 /* pity we don't have strtoul everywhere */
1395 newmask = (unsigned int)atoi(arg);
1396 if (sno_what == SNO_DEL)
1397 newmask = oldmask & ~newmask;
1398 else if (sno_what == SNO_ADD)
1403 static void delfrom_list(struct Client *cptr, struct SLink **list)
1406 struct SLink* prv = NULL;
1408 for (tmp = *list; tmp; tmp = tmp->next) {
1409 if (tmp->value.cptr == cptr) {
1411 prv->next = tmp->next;
1422 * This function sets a Client's server notices mask, according to
1423 * the parameter 'what'. This could be even faster, but the code
1424 * gets mighty hard to read :)
1426 void set_snomask(struct Client *cptr, unsigned int newmask, int what)
1428 unsigned int oldmask, diffmask; /* unsigned please */
1432 oldmask = cptr->snomask;
1434 if (what == SNO_ADD)
1436 else if (what == SNO_DEL)
1437 newmask = oldmask & ~newmask;
1438 else if (what != SNO_SET) /* absolute set, no math needed */
1439 sendto_ops("setsnomask called with %d ?!", what);
1441 newmask &= (IsAnOper(cptr) ? SNO_ALL : SNO_USER);
1443 diffmask = oldmask ^ newmask;
1445 for (i = 0; diffmask >> i; i++) {
1446 if (((diffmask >> i) & 1))
1448 if (((newmask >> i) & 1))
1451 tmp->next = opsarray[i];
1452 tmp->value.cptr = cptr;
1456 /* not real portable :( */
1457 delfrom_list(cptr, &opsarray[i]);
1460 cptr->snomask = newmask;
1464 * is_silenced : Does the actual check wether sptr is allowed
1465 * to send a message to acptr.
1466 * Both must be registered persons.
1467 * If sptr is silenced by acptr, his message should not be propagated,
1468 * but more over, if this is detected on a server not local to sptr
1469 * the SILENCE mask is sent upstream.
1471 int is_silenced(struct Client *sptr, struct Client *acptr)
1475 static char sender[HOSTLEN + NICKLEN + USERLEN + 5];
1476 static char senderip[16 + NICKLEN + USERLEN + 5];
1478 if (!(acptr->user) || !(lp = acptr->user->silence) || !(user = sptr->user))
1480 sprintf_irc(sender, "%s!%s@%s", sptr->name, user->username, user->host);
1481 sprintf_irc(senderip, "%s!%s@%s", sptr->name, user->username,
1482 ircd_ntoa((const char*) &sptr->ip));
1483 for (; lp; lp = lp->next)
1485 if ((!(lp->flags & CHFL_SILENCE_IPMASK) && !match(lp->value.cp, sender)) ||
1486 ((lp->flags & CHFL_SILENCE_IPMASK) && !match(lp->value.cp, senderip)))
1488 if (!MyConnect(sptr))
1490 if (Protocol(sptr->from) < 10)
1491 sendto_one(sptr->from, ":%s SILENCE %s %s", acptr->name,
1492 sptr->name, lp->value.cp);
1494 sendto_one(sptr->from, ":%s SILENCE %s%s %s", acptr->name,
1495 NumNick(sptr), lp->value.cp);
1506 * Removes all silence masks from the list of sptr that fall within `mask'
1507 * Returns -1 if none where found, 0 otherwise.
1509 int del_silence(struct Client *sptr, char *mask)
1515 for (lp = &sptr->user->silence; *lp;) {
1516 if (!mmatch(mask, (*lp)->value.cp))
1520 MyFree(tmp->value.cp);
1530 int add_silence(struct Client* sptr, const char* mask)
1532 struct SLink *lp, **lpp;
1533 int cnt = 0, len = strlen(mask);
1536 for (lpp = &sptr->user->silence, lp = *lpp; lp;)
1538 if (0 == ircd_strcmp(mask, lp->value.cp))
1540 if (!mmatch(mask, lp->value.cp))
1542 struct SLink *tmp = lp;
1543 *lpp = lp = lp->next;
1544 MyFree(tmp->value.cp);
1550 len += strlen(lp->value.cp);
1551 if ((len > MAXSILELENGTH) || (++cnt >= MAXSILES))
1553 sendto_one(sptr, err_str(ERR_SILELISTFULL), me.name, sptr->name, mask);
1556 else if (!mmatch(lp->value.cp, mask))
1563 memset(lp, 0, sizeof(struct SLink));
1564 lp->next = sptr->user->silence;
1565 lp->value.cp = (char*) MyMalloc(strlen(mask) + 1);
1566 assert(0 != lp->value.cp);
1567 strcpy(lp->value.cp, mask);
1568 if ((ip_start = strrchr(mask, '@')) && check_if_ipmask(ip_start + 1))
1569 lp->flags = CHFL_SILENCE_IPMASK;
1570 sptr->user->silence = lp;