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"
69 static int userCount = 0;
72 * 'make_user' add's an User information block to a client
73 * if it was not previously allocated.
75 struct User *make_user(struct Client *cptr)
80 cptr->user = (struct User*) MyMalloc(sizeof(struct User));
81 assert(0 != cptr->user);
83 /* All variables are 0 by default */
84 memset(cptr->user, 0, sizeof(struct User));
88 cptr->user->refcnt = 1;
96 * Decrease user reference count by one and release block, if count reaches 0.
98 void free_user(struct User* user)
101 assert(0 < user->refcnt);
103 if (--user->refcnt == 0) {
109 assert(0 == user->joined);
110 assert(0 == user->invited);
111 assert(0 == user->channel);
120 void user_count_memory(size_t* count_out, size_t* bytes_out)
122 assert(0 != count_out);
123 assert(0 != bytes_out);
124 *count_out = userCount;
125 *bytes_out = userCount * sizeof(struct User);
129 * user_set_away - set user away state
130 * returns 1 if client is away or changed away message, 0 if
131 * client is removing away status.
132 * NOTE: this function may modify user and message, so they
135 int user_set_away(struct User* user, char* message)
142 if (EmptyString(message)) {
144 * Marking as not away
155 unsigned int len = strlen(message);
157 if (len > TOPICLEN) {
158 message[TOPICLEN] = '\0';
162 away = (char*) MyRealloc(away, len + 1);
164 away = (char*) MyMalloc(len + 1);
168 strcpy(away, message);
170 return (user->away != 0);
176 * Local function to find the next matching client. The search
177 * can be continued from the specified client entry. Normal
180 * for (x = client; x = next_client(x,mask); x = x->next)
181 * HandleMatchingClient;
184 struct Client *next_client(struct Client *next, const char* ch)
186 struct Client *tmp = next;
191 next = FindClient(ch);
192 next = next ? next : tmp;
193 if (tmp->prev == next)
197 for (; next; next = next->next)
198 if (!match(ch, next->name))
206 * Do the basic thing in delivering the message (command)
207 * across the relays to the specific server (server) for
210 * Note: The command is a format string and *MUST* be
211 * of prefixed style (e.g. ":%s COMMAND %s ...").
212 * Command can have only max 8 parameters.
214 * server parv[server] is the parameter identifying the
218 * parv[server] is replaced with the pointer to the
219 * real servername from the matched client (I'm lazy
222 * returns: (see #defines)
224 int hunt_server(int MustBeOper, struct Client *cptr, struct Client *sptr, char *command,
225 int server, int parc, char *parv[])
227 struct Client *acptr;
230 /* Assume it's me, if no server or an unregistered client */
231 if (parc <= server || EmptyString(parv[server]) || IsUnknown(sptr))
232 return (HUNTED_ISME);
234 /* Make sure it's a server */
235 if (MyUser(sptr) || Protocol(cptr) < 10)
237 /* Make sure it's a server */
238 if (!strchr(parv[server], '*')) {
239 if (0 == (acptr = FindClient(parv[server])))
240 return HUNTED_NOSUCH;
242 acptr = acptr->user->server;
244 else if (!(acptr = find_match_server(parv[server])))
246 sendto_one(sptr, err_str(ERR_NOSUCHSERVER),
247 me.name, parv[0], parv[server]);
248 return (HUNTED_NOSUCH);
251 else if (!(acptr = FindNServer(parv[server])))
252 return (HUNTED_NOSUCH); /* Server broke off in the meantime */
255 return (HUNTED_ISME);
257 if (MustBeOper && !IsPrivileged(sptr))
259 sendto_one(sptr, err_str(ERR_NOPRIVILEGES), me.name, sptr->name);
260 return HUNTED_NOSUCH;
263 strcpy(y, acptr->yxx);
266 assert(!IsServer(sptr));
267 sendto_one(acptr, command, NumNick(sptr), parv[1], parv[2], parv[3], parv[4],
268 parv[5], parv[6], parv[7], parv[8]);
270 return (HUNTED_PASS);
274 * 'do_nick_name' ensures that the given parameter (nick) is really a proper
275 * string for a nickname (note, the 'nick' may be modified in the process...)
277 * RETURNS the length of the final NICKNAME (0, if nickname is invalid)
279 * Nickname characters are in range 'A'..'}', '_', '-', '0'..'9'
280 * anything outside the above set will terminate nickname.
281 * In addition, the first character cannot be '-' or a Digit.
284 * The '~'-character should be allowed, but a change should be global,
285 * some confusion would result if only few servers allowed it...
287 int do_nick_name(char* nick)
290 char* end = ch + NICKLEN;
293 if (*ch == '-' || IsDigit(*ch)) /* first character in [0..9-] */
296 for ( ; (ch < end) && *ch; ++ch)
297 if (!IsNickChar(*ch))
308 * Copy `source' to `dest', replacing all occurances of '~' and characters that
309 * are not `isIrcUi' by an underscore.
310 * Copies at most USERLEN - 1 characters or up till the first control character.
311 * If `tilde' is true, then a tilde is prepended to `dest'.
312 * Note that `dest' and `source' can point to the same area or to different
313 * non-overlapping areas.
315 static char *clean_user_id(char *dest, char *source, int tilde)
322 ch = *s++; /* Store first character to copy: */
325 *d++ = '~'; /* If `dest' == `source', then this overwrites `ch' */
328 while (ch && !IsCntrl(ch) && rlen--)
330 char nch = *s++; /* Store next character to copy */
331 *d++ = IsUserChar(ch) ? ch : '_'; /* This possibly overwrites it */
344 * This function is called when both NICK and USER messages
345 * have been accepted for the client, in whatever order. Only
346 * after this the USER message is propagated.
348 * NICK's must be propagated at once when received, although
349 * it would be better to delay them too until full info is
350 * available. Doing it is not so simple though, would have
351 * to implement the following:
353 * 1) user telnets in and gives only "NICK foobar" and waits
354 * 2) another user far away logs in normally with the nick
355 * "foobar" (quite legal, as this server didn't propagate it).
356 * 3) now this server gets nick "foobar" from outside, but
357 * has already the same defined locally. Current server
358 * would just issue "KILL foobar" to clean out dups. But,
359 * this is not fair. It should actually request another
360 * nick from local user or kill him/her...
362 int register_user(struct Client *cptr, struct Client *sptr,
363 const char *nick, char *username)
365 struct ConfItem* aconf;
369 char c = 0; /* not alphanum */
370 char d = 'a'; /* not a digit */
378 short digitgroups = 0;
379 struct User* user = sptr->user;
381 char featurebuf[512];
383 user->last = CurrentTime;
384 parv[0] = sptr->name;
385 parv[1] = parv[2] = NULL;
389 static time_t last_too_many1;
390 static time_t last_too_many2;
392 assert(cptr == sptr);
393 switch (conf_check_client(sptr))
397 case ACR_NO_AUTHORIZATION:
398 sendto_op_mask(SNO_UNAUTH, "Unauthorized connection from %s.",
399 get_client_name(sptr, HIDE_IP));
400 ++ServerStats->is_ref;
401 return exit_client(cptr, sptr, &me,
402 "No Authorization - use another server");
403 case ACR_TOO_MANY_IN_CLASS:
404 if (CurrentTime - last_too_many1 >= (time_t) 60)
406 last_too_many1 = CurrentTime;
407 sendto_op_mask(SNO_TOOMANY, "Too many connections in class for %s.",
408 get_client_name(sptr, HIDE_IP));
410 ++ServerStats->is_ref;
411 IPcheck_connect_fail(sptr->ip);
412 return exit_client(cptr, sptr, &me,
413 "Sorry, your connection class is full - try again later or try another server");
414 case ACR_TOO_MANY_FROM_IP:
415 if (CurrentTime - last_too_many2 >= (time_t) 60)
417 last_too_many2 = CurrentTime;
418 sendto_op_mask(SNO_TOOMANY, "Too many connections from same IP for %s.",
419 get_client_name(sptr, HIDE_IP));
421 ++ServerStats->is_ref;
422 return exit_client(cptr, sptr, &me,
423 "Too many connections from your host");
424 case ACR_ALREADY_AUTHORIZED:
425 /* Can this ever happen? */
427 ++ServerStats->is_ref;
428 IPcheck_connect_fail(sptr->ip);
429 return exit_client(cptr, sptr, &me, "Unknown error -- Try again");
431 ircd_strncpy(user->host, sptr->sockhost, HOSTLEN);
432 aconf = sptr->confs->value.aconf;
434 clean_user_id(user->username,
435 (sptr->flags & FLAGS_GOTID) ? sptr->username : username,
436 (sptr->flags & FLAGS_DOID) && !(sptr->flags & FLAGS_GOTID));
438 if ((user->username[0] == '\0')
439 || ((user->username[0] == '~') && (user->username[1] == '\000')))
440 return exit_client(cptr, sptr, &me, "USER: Bogus userid.");
442 if (!EmptyString(aconf->passwd)
443 && !(IsDigit(*aconf->passwd) && !aconf->passwd[1])
445 && strcmp("ONE", aconf->passwd)
447 && strcmp(sptr->passwd, aconf->passwd))
449 ServerStats->is_ref++;
450 IPcheck_connect_fail(sptr->ip);
451 sendto_one(sptr, err_str(ERR_PASSWDMISMATCH), me.name, parv[0]);
452 return exit_client(cptr, sptr, &me, "Bad Password");
454 memset(sptr->passwd, 0, sizeof(sptr->passwd));
456 * following block for the benefit of time-dependent K:-lines
458 if (find_kill(sptr)) {
459 ServerStats->is_ref++;
460 IPcheck_connect_fail(sptr->ip);
461 return exit_client(cptr, sptr, &me, "K-lined");
464 * Check for mixed case usernames, meaning probably hacked. Jon2 3-94
465 * Summary of rules now implemented in this patch: Ensor 11-94
466 * In a mixed-case name, if first char is upper, one more upper may
467 * appear anywhere. (A mixed-case name *must* have an upper first
468 * char, and may have one other upper.)
469 * A third upper may appear if all 3 appear at the beginning of the
470 * name, separated only by "others" (-/_/.).
471 * A single group of digits is allowed anywhere.
472 * Two groups of digits are allowed if at least one of the groups is
473 * at the beginning or the end.
474 * Only one '-', '_', or '.' is allowed (or two, if not consecutive).
475 * But not as the first or last char.
476 * No other special characters are allowed.
477 * Name must contain at least one letter.
479 tmpstr2 = tmpstr = (username[0] == '~' ? &username[1] : username);
480 while (*tmpstr && !badid)
492 if ((leadcaps || pos == 1) && !lower && !digits)
498 if (pos == 1 || !IsDigit(d))
505 else if (c == '-' || c == '_' || c == '.')
510 else if (d == '-' || d == '_' || d == '.' || other > 2)
519 if (lower && upper && (!leadcaps || leadcaps > 3 ||
520 (upper > 2 && upper > leadcaps)))
522 else if (digitgroups == 2 && !(IsDigit(tmpstr2[0]) || IsDigit(c)))
524 else if ((!lower && !upper) || !IsAlnum(c))
527 if (badid && (!(sptr->flags & FLAGS_GOTID) ||
528 strcmp(sptr->username, username) != 0))
530 ServerStats->is_ref++;
531 sendto_one(cptr, ":%s %d %s :Your username is invalid.",
532 me.name, ERR_INVALIDUSERNAME, cptr->name);
534 ":%s %d %s :Connect with your real username, in lowercase.",
535 me.name, ERR_INVALIDUSERNAME, cptr->name);
536 sendto_one(cptr, ":%s %d %s :If your mail address were foo@bar.com, "
537 "your username would be foo.",
538 me.name, ERR_INVALIDUSERNAME, cptr->name);
539 return exit_client(cptr, sptr, &me, "USER: Bad username");
541 Count_unknownbecomesclient(sptr, UserStats);
544 ircd_strncpy(user->username, username, USERLEN);
545 Count_newremoteclient(UserStats, user->server);
549 if (IsInvisible(sptr))
550 ++UserStats.inv_clients;
554 if (MyConnect(sptr)) {
555 sptr->handler = CLIENT_HANDLER;
556 release_dns_reply(sptr);
558 sendto_one(sptr, rpl_str(RPL_WELCOME), me.name, nick, nick);
560 * This is a duplicate of the NOTICE but see below...
562 sendto_one(sptr, rpl_str(RPL_YOURHOST), me.name, nick,
564 sendto_one(sptr, rpl_str(RPL_CREATED), me.name, nick, creation);
565 sendto_one(sptr, rpl_str(RPL_MYINFO), me.name, parv[0], me.name, version);
566 sprintf_irc(featurebuf,FEATURES,FEATURESVALUES);
567 sendto_one(sptr, rpl_str(RPL_ISUPPORT), me.name, nick, featurebuf);
568 m_lusers(sptr, sptr, 1, parv);
571 m_motd(sptr, NULL, 1, parv);
573 m_motd(sptr, sptr, 1, parv);
575 nextping = CurrentTime;
576 if (sptr->snomask & SNO_NOISY)
577 set_snomask(sptr, sptr->snomask & SNO_NOISY, SNO_ADD);
578 #ifdef ALLOW_SNO_CONNEXIT
579 #ifdef SNO_CONNEXIT_IP
581 ":%s NOTICE * :*** Notice -- Client connecting: %s (%s@%s) [%s] {%d}",
582 me.name, nick, user->username, user->host, cptr->sock_ip,
583 get_client_class(sptr));
584 sendbufto_op_mask(SNO_CONNEXIT);
585 #else /* SNO_CONNEXIT_IP */
587 ":%s NOTICE * :*** Notice -- Client connecting: %s (%s@%s)",
588 me.name, nick, user->username, user->host);
589 sendbufto_op_mask(SNO_CONNEXIT);
590 #endif /* SNO_CONNEXIT_IP */
591 #endif /* ALLOW_SNO_CONNEXIT */
592 IPcheck_connect_succeeded(sptr);
595 /* if (IsServer(cptr)) */
597 struct Client *acptr;
599 acptr = user->server;
600 if (acptr->from != sptr->from)
602 sendto_one(cptr, "%s " TOK_KILL " %s%s :%s (%s != %s[%s])",
603 NumServ(&me), NumNick(sptr), me.name, user->server->name,
604 acptr->from->name, acptr->from->sockhost);
605 sptr->flags |= FLAGS_KILLED;
606 return exit_client(cptr, sptr, &me, "NICK server wrong direction");
609 sptr->flags |= (acptr->flags & FLAGS_TS8);
612 * Check to see if this user is being propogated
613 * as part of a net.burst, or is using protocol 9.
614 * FIXME: This can be speeded up - its stupid to check it for
615 * every NICK message in a burst again --Run.
617 for (acptr = user->server; acptr != &me; acptr = acptr->serv->up) {
618 if (IsBurst(acptr) || Protocol(acptr) < 10)
621 if (!IPcheck_remote_connect(sptr, (acptr != &me)))
623 * We ran out of bits to count this
625 return exit_client(cptr, sptr, &me, "More than 255 connections from this address");
628 tmpstr = umode_str(sptr);
629 sendto_serv_butone(cptr, *tmpstr ?
630 "%s " TOK_NICK " %s %d %d %s %s +%s %s %s%s :%s" :
631 "%s " TOK_NICK " %s %d %d %s %s %s%s %s%s :%s",
632 NumServ(user->server), nick, sptr->hopcount + 1, sptr->lastnick,
633 user->username, user->host, tmpstr,
634 inttobase64(ip_base64, ntohl(sptr->ip.s_addr), 6),
635 NumNick(sptr), sptr->info);
637 /* Send umode to client */
640 send_umode(cptr, sptr, 0, ALL_UMODES);
641 if (sptr->snomask != SNO_DEFAULT && (sptr->flags & FLAGS_SERVNOTICE))
642 sendto_one(sptr, rpl_str(RPL_SNOMASK), me.name, sptr->name,
643 sptr->snomask, sptr->snomask);
650 static const struct UserMode {
655 { FLAGS_LOCOP, 'O' },
656 { FLAGS_INVISIBLE, 'i' },
657 { FLAGS_WALLOP, 'w' },
658 { FLAGS_SERVNOTICE, 's' },
660 { FLAGS_CHSERV, 'k' },
664 #define USERMODELIST_SIZE sizeof(userModeList) / sizeof(struct UserMode)
667 static int user_modes[] = {
670 FLAGS_INVISIBLE, 'i',
672 FLAGS_SERVNOTICE, 's',
681 * XXX - find a way to get rid of this
683 static char umodeBuf[BUFSIZE];
685 int set_nick_name(struct Client* cptr, struct Client* sptr,
686 const char* nick, int parc, char* parv[])
688 if (IsServer(sptr)) {
694 * A server introducing a new client, change source
696 struct Client* new_client = make_client(cptr, STAT_UNKNOWN);
697 assert(0 != new_client);
699 new_client->hopcount = atoi(parv[2]);
700 new_client->lastnick = atoi(parv[3]);
701 if (Protocol(cptr) > 9 && parc > 7 && *parv[6] == '+') {
702 for (p = parv[6] + 1; *p; p++) {
703 for (i = 0; i < USERMODELIST_SIZE; ++i) {
704 if (userModeList[i].c == *p) {
705 new_client->flags |= userModeList[i].flag;
714 strcpy(new_client->name, nick);
715 new_client->user = make_user(new_client);
716 new_client->user->server = sptr;
717 SetRemoteNumNick(new_client, parv[parc - 2]);
719 * IP# of remote client
721 new_client->ip.s_addr = htonl(base64toint(parv[parc - 3]));
723 add_client_to_list(new_client);
724 hAddClient(new_client);
726 sptr->serv->ghost = 0; /* :server NICK means end of net.burst */
727 ircd_strncpy(new_client->username, parv[4], USERLEN);
728 ircd_strncpy(new_client->user->host, parv[5], HOSTLEN);
729 ircd_strncpy(new_client->info, parv[parc - 1], REALLEN);
730 if ((gline = gline_lookup(new_client)) && GlineIsActive(gline))
731 gline_resend(cptr, gline);
732 return register_user(cptr, new_client, new_client->name, parv[4]);
734 else if (sptr->name[0]) {
736 * Client changing its nick
738 * If the client belongs to me, then check to see
739 * if client is on any channels where it is currently
740 * banned. If so, do not allow the nick change to occur.
743 const char* channel_name;
744 if ((channel_name = find_no_nickchange_channel(sptr))) {
745 sendto_one(cptr, err_str(ERR_BANNICKCHANGE), me.name, parv[0],
750 * Refuse nick change if the last nick change was less
751 * then 30 seconds ago. This is intended to get rid of
752 * clone bots doing NICK FLOOD. -SeKs
753 * If someone didn't change their nick for more then 60 seconds
754 * however, allow to do two nick changes immedately after another
755 * before limiting the nick flood. -Run
757 if (CurrentTime < cptr->nextnick) {
759 sendto_one(cptr, err_str(ERR_NICKTOOFAST),
760 me.name, parv[0], parv[1], cptr->nextnick - CurrentTime);
761 /* Send error message */
762 sendto_prefix_one(cptr, cptr, ":%s NICK %s", parv[0], parv[0]);
763 /* bounce NICK to user */
764 return 0; /* ignore nick change! */
767 /* Limit total to 1 change per NICK_DELAY seconds: */
768 cptr->nextnick += NICK_DELAY;
769 /* However allow _maximal_ 1 extra consecutive nick change: */
770 if (cptr->nextnick < CurrentTime)
771 cptr->nextnick = CurrentTime;
775 * Also set 'lastnick' to current time, if changed.
777 if (0 != ircd_strcmp(parv[0], nick))
778 sptr->lastnick = (sptr == cptr) ? TStime() : atoi(parv[2]);
781 * Client just changing his/her nick. If he/she is
782 * on a channel, send note of change to all clients
783 * on that channel. Propagate notice to other servers.
786 sendto_common_channels(sptr, ":%s NICK :%s", parv[0], nick);
787 add_history(sptr, 1);
788 sendto_serv_butone(cptr,
789 "%s%s " TOK_NICK " %s " TIME_T_FMT, NumNick(sptr), nick, sptr->lastnick);
792 sendto_one(sptr, ":%s NICK :%s", parv[0], nick);
796 strcpy(sptr->name, nick);
800 /* Local client setting NICK the first time */
802 strcpy(sptr->name, nick);
804 sptr->user = make_user(sptr);
805 sptr->user->server = &me;
807 SetLocalNumNick(sptr);
811 * If the client hasn't gotten a cookie-ping yet,
812 * choose a cookie and send it. -record!jegelhof@cloud9.net
816 sptr->cookie = (ircrandom() & 0x7fffffff);
817 } while (!sptr->cookie);
818 sendto_one(cptr, "PING :%u", sptr->cookie);
820 else if (*sptr->user->host && sptr->cookie == COOKIE_VERIFIED) {
822 * USER and PONG already received, now we have NICK.
823 * register_user may reject the client and call exit_client
824 * for it - must test this and exit m_nick too !
826 sptr->lastnick = TStime(); /* Always local client */
827 if (register_user(cptr, sptr, nick, sptr->user->username) == CPTR_KILLED)
834 static unsigned char hash_target(unsigned int target)
836 return (unsigned char) (target >> 16) ^ (target >> 8);
842 * sptr must be a local client!
844 * Cannonifies target for client `sptr'.
846 void add_target(struct Client *sptr, void *target)
848 unsigned char hash = hash_target((unsigned int) target);
849 unsigned char* targets;
854 targets = sptr->targets;
858 for (i = 0; i < MAXTARGETS; ++i) {
859 if (targets[i] == hash)
865 memmove(&targets[RESERVEDTARGETS + 1],
866 &targets[RESERVEDTARGETS], MAXTARGETS - RESERVEDTARGETS - 1);
867 targets[RESERVEDTARGETS] = hash;
873 * sptr must be a local client !
875 * Returns 'true' (1) when too many targets are addressed.
876 * Returns 'false' (0) when it's ok to send to this target.
878 int check_target_limit(struct Client *sptr, void *target, const char *name,
881 unsigned char hash = hash_target((unsigned int) target);
883 unsigned char* targets;
887 targets = sptr->targets;
890 * Same target as last time?
892 if (targets[0] == hash)
894 for (i = 1; i < MAXTARGETS; ++i) {
895 if (targets[i] == hash) {
896 memmove(&targets[1], &targets[0], i);
905 if (CurrentTime < sptr->nexttarget) {
906 if (sptr->nexttarget - CurrentTime < TARGET_DELAY + 8) {
910 sptr->nexttarget += 2;
911 sendto_one(sptr, err_str(ERR_TARGETTOOFAST),
912 me.name, sptr->name, name, sptr->nexttarget - CurrentTime);
918 sendto_one(sptr, ":%s NOTICE %s :New target: %s; ft " TIME_T_FMT,
919 me.name, sptr->name, name, (CurrentTime - sptr->nexttarget) / TARGET_DELAY);
921 sptr->nexttarget += TARGET_DELAY;
922 if (sptr->nexttarget < CurrentTime - (TARGET_DELAY * (MAXTARGETS - 1)))
923 sptr->nexttarget = CurrentTime - (TARGET_DELAY * (MAXTARGETS - 1));
926 memmove(&targets[1], &targets[0], MAXTARGETS - 1);
932 * whisper - called from m_cnotice and m_cprivmsg.
934 * parv[0] = sender prefix
937 * parv[3] = Private message text
939 * Added 971023 by Run.
940 * Reason: Allows channel operators to sent an arbitrary number of private
941 * messages to users on their channel, avoiding the max.targets limit.
942 * Building this into m_private would use too much cpu because we'd have
943 * to a cross channel lookup for every private message!
944 * Note that we can't allow non-chan ops to use this command, it would be
945 * abused by mass advertisers.
948 int whisper(struct Client* source, const char* nick, const char* channel,
949 const char* text, int is_notice)
952 struct Channel* chptr;
953 struct Membership* membership;
957 assert(0 != channel);
958 assert(MyUser(source));
960 if (!(dest = FindUser(nick))) {
961 sendto_one(source, err_str(ERR_NOSUCHNICK), me.name, source->name, nick);
964 if (!(chptr = FindChannel(channel))) {
965 sendto_one(source, err_str(ERR_NOSUCHCHANNEL), me.name, source->name, channel);
969 * compare both users channel lists, instead of the channels user list
970 * since the link is the same, this should be a little faster for channels
971 * with a lot of users
973 for (membership = source->user->channel; membership; membership = membership->next_channel) {
974 if (chptr == membership->channel)
977 if (0 == membership) {
978 sendto_one(source, err_str(ERR_NOTONCHANNEL), me.name, source->name, chptr->chname);
981 if (!IsVoicedOrOpped(membership)) {
982 sendto_one(source, err_str(ERR_VOICENEEDED), me.name, source->name, chptr->chname);
986 * lookup channel in destination
988 assert(0 != dest->user);
989 for (membership = dest->user->channel; membership; membership = membership->next_channel) {
990 if (chptr == membership->channel)
993 if (0 == membership || IsZombie(membership)) {
994 sendto_one(source, err_str(ERR_USERNOTINCHANNEL), me.name,
995 source->name, dest->name, chptr->chname);
998 if (is_silenced(source, dest))
1001 if (dest->user->away)
1002 sendto_one(source, rpl_str(RPL_AWAY), me.name, source->name,
1003 dest->name, dest->user->away);
1005 sendto_prefix_one(dest, source, ":%s %s %s :%s",
1006 source->name, is_notice ? MSG_NOTICE : MSG_PRIVATE,
1009 sendto_one(dest, "%s%s %s %s%s :%s",
1010 NumNick(source), is_notice ? TOK_NOTICE : TOK_PRIVATE,
1011 NumNick(dest), text);
1017 * added Sat Jul 25 07:30:42 EST 1992
1019 void send_umode_out(struct Client *cptr, struct Client *sptr, int old)
1022 struct Client *acptr;
1024 send_umode(NULL, sptr, old, SEND_UMODES);
1026 for (i = HighestFd; i >= 0; i--) {
1027 if ((acptr = LocalClientArray[i]) && IsServer(acptr) &&
1028 (acptr != cptr) && (acptr != sptr) && *umodeBuf)
1029 sendto_one(acptr, "%s%s " TOK_MODE " %s :%s", NumNick(sptr), sptr->name, umodeBuf);
1031 if (cptr && MyUser(cptr))
1032 send_umode(cptr, sptr, old, ALL_UMODES);
1037 * send_user_info - send user info userip/userhost
1038 * NOTE: formatter must put info into buffer and return a pointer to the end of
1039 * the data it put in the buffer.
1041 void send_user_info(struct Client* sptr, char* names, int rpl, InfoFormatter fmt)
1047 int users_found = 0;
1048 struct Client* acptr;
1049 char buf[BUFSIZE * 2];
1055 sbuf = sprintf_irc(buf, rpl_str(rpl), me.name, sptr->name);
1057 for (name = ircd_strtok(&p, names, " "); name; name = ircd_strtok(&p, 0, " ")) {
1058 if ((acptr = FindUser(name))) {
1061 sbuf = (*fmt)(acptr, sbuf);
1063 if (5 == ++arg_count)
1067 send_buffer(sptr, buf);
1072 * set_user_mode() added 15/10/91 By Darren Reed.
1075 * parv[1] - username to change mode for
1076 * parv[2] - modes to change
1078 int set_user_mode(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
1082 struct Client *acptr;
1086 unsigned int tmpmask = 0;
1087 int snomask_given = 0;
1093 return need_more_params(sptr, "MODE");
1095 if (!(acptr = FindUser(parv[1])))
1097 if (MyConnect(sptr))
1098 sendto_one(sptr, err_str(ERR_NOSUCHCHANNEL), me.name, parv[0], parv[1]);
1102 if (IsServer(sptr) || sptr != acptr)
1105 sendto_ops_butone(NULL, &me, ":%s WALLOPS :MODE for User %s From %s!%s",
1106 me.name, parv[1], cptr->name, sptr->name);
1108 sendto_one(sptr, err_str(ERR_USERSDONTMATCH), me.name, parv[0]);
1116 for (i = 0; i < USERMODELIST_SIZE; ++i) {
1117 if ( (userModeList[i].flag & sptr->flags))
1118 *m++ = userModeList[i].c;
1121 sendto_one(sptr, rpl_str(RPL_UMODEIS), me.name, parv[0], buf);
1122 if ((sptr->flags & FLAGS_SERVNOTICE) && MyConnect(sptr)
1124 (unsigned int)(IsOper(sptr) ? SNO_OPERDEFAULT : SNO_DEFAULT))
1125 sendto_one(sptr, rpl_str(RPL_SNOMASK), me.name, parv[0], sptr->snomask,
1131 * find flags already set for user
1132 * why not just copy them?
1134 setflags = sptr->flags;
1137 for (i = 0; i < USERMODELIST_SIZE; ++i) {
1138 if (sptr->flags & userModeList[i].flag)
1139 setflags |= userModeList[i].flag;
1142 if (MyConnect(sptr))
1143 tmpmask = sptr->snomask;
1146 * parse mode change string(s)
1148 for (p = &parv[2]; *p; p++) { /* p is changed in loop too */
1149 for (m = *p; *m; m++) {
1158 if (*(p + 1) && is_snomask(*(p + 1))) {
1160 tmpmask = umode_make_snomask(tmpmask, *++p, what);
1161 tmpmask &= (IsAnOper(sptr) ? SNO_ALL : SNO_USER);
1164 tmpmask = (what == MODE_ADD) ?
1165 (IsAnOper(sptr) ? SNO_OPERDEFAULT : SNO_DEFAULT) : 0;
1167 sptr->flags |= FLAGS_SERVNOTICE;
1169 sptr->flags &= ~FLAGS_SERVNOTICE;
1172 if (what == MODE_ADD)
1178 if (what == MODE_ADD)
1181 sptr->flags &= ~(FLAGS_OPER | FLAGS_LOCOP);
1182 if (MyConnect(sptr)) {
1183 tmpmask = sptr->snomask & ~SNO_OPER;
1184 sptr->handler = CLIENT_HANDLER;
1189 if (what == MODE_ADD)
1192 sptr->flags &= ~(FLAGS_OPER | FLAGS_LOCOP);
1193 if (MyConnect(sptr)) {
1194 tmpmask = sptr->snomask & ~SNO_OPER;
1195 sptr->handler = CLIENT_HANDLER;
1200 if (what == MODE_ADD)
1203 ClearInvisible(sptr);
1206 if (what == MODE_ADD)
1212 if (what == MODE_ADD)
1213 SetChannelService(sptr);
1215 ClearChannelService(sptr);
1218 if (what == MODE_ADD)
1229 * Evaluate rules for new user mode
1230 * Stop users making themselves operators too easily:
1232 if (!(setflags & FLAGS_OPER) && IsOper(sptr) && !IsServer(cptr))
1234 if (!(setflags & FLAGS_LOCOP) && IsLocOp(sptr) && !IsServer(cptr))
1236 #ifdef WALLOPS_OPER_ONLY
1238 * only send wallops to opers
1240 if (!IsAnOper(sptr) && !(setflags & FLAGS_WALLOP) && !IsServer(cptr))
1243 if ((setflags & (FLAGS_OPER | FLAGS_LOCOP)) && !IsAnOper(sptr) &&
1245 det_confs_butmask(sptr, CONF_CLIENT & ~CONF_OPS);
1247 * new umode; servers can set it, local users cannot;
1248 * prevents users from /kick'ing or /mode -o'ing
1250 if (!(setflags & FLAGS_CHSERV) && !IsServer(cptr))
1251 ClearChannelService(sptr);
1253 * Compare new flags with old flags and send string which
1254 * will cause servers to update correctly.
1256 if ((setflags & FLAGS_OPER) && !IsOper(sptr))
1258 if (!(setflags & FLAGS_OPER) && IsOper(sptr))
1260 if ((setflags & FLAGS_INVISIBLE) && !IsInvisible(sptr))
1261 --UserStats.inv_clients;
1262 if (!(setflags & FLAGS_INVISIBLE) && IsInvisible(sptr))
1263 ++UserStats.inv_clients;
1264 send_umode_out(cptr, sptr, setflags);
1266 if (MyConnect(sptr)) {
1267 if (tmpmask != sptr->snomask)
1268 set_snomask(sptr, tmpmask, SNO_SET);
1269 if (sptr->snomask && snomask_given)
1270 sendto_one(sptr, rpl_str(RPL_SNOMASK), me.name, sptr->name,
1271 sptr->snomask, sptr->snomask);
1278 * Build umode string for BURST command
1281 char *umode_str(struct Client *cptr)
1283 char* m = umodeBuf; /* Maximum string size: "owidg\0" */
1287 c_flags = cptr->flags & SEND_UMODES; /* cleaning up the original code */
1289 for (i = 0; i < USERMODELIST_SIZE; ++i) {
1290 if ( (c_flags & userModeList[i].flag))
1291 *m++ = userModeList[i].c;
1295 return umodeBuf; /* Note: static buffer, gets
1296 overwritten by send_umode() */
1300 * Send the MODE string for user (user) to connection cptr
1303 void send_umode(struct Client *cptr, struct Client *sptr, int old, int sendmask)
1308 int what = MODE_NULL;
1311 * Build a string in umodeBuf to represent the change in the user's
1312 * mode between the new (sptr->flag) and 'old'.
1316 for (i = 0; i < USERMODELIST_SIZE; ++i) {
1317 flag = userModeList[i].flag;
1318 if (MyUser(sptr) && !(flag & sendmask))
1320 if ( (flag & old) && !(sptr->flags & flag))
1322 if (what == MODE_DEL)
1323 *m++ = userModeList[i].c;
1328 *m++ = userModeList[i].c;
1331 else if (!(flag & old) && (sptr->flags & flag))
1333 if (what == MODE_ADD)
1334 *m++ = userModeList[i].c;
1339 *m++ = userModeList[i].c;
1344 if (*umodeBuf && cptr)
1345 sendto_one(cptr, ":%s MODE %s :%s", sptr->name, sptr->name, umodeBuf);
1349 * Check to see if this resembles a sno_mask. It is if 1) there is
1350 * at least one digit and 2) The first digit occurs before the first
1351 * alphabetic character.
1353 int is_snomask(char *word)
1357 for (; *word; word++)
1360 else if (IsAlpha(*word))
1367 * If it begins with a +, count this as an additive mask instead of just
1368 * a replacement. If what == MODE_DEL, "+" has no special effect.
1370 unsigned int umode_make_snomask(unsigned int oldmask, char *arg, int what)
1372 unsigned int sno_what;
1373 unsigned int newmask;
1377 if (what == MODE_ADD)
1382 else if (*arg == '-')
1385 if (what == MODE_ADD)
1391 sno_what = (what == MODE_ADD) ? SNO_SET : SNO_DEL;
1392 /* pity we don't have strtoul everywhere */
1393 newmask = (unsigned int)atoi(arg);
1394 if (sno_what == SNO_DEL)
1395 newmask = oldmask & ~newmask;
1396 else if (sno_what == SNO_ADD)
1401 static void delfrom_list(struct Client *cptr, struct SLink **list)
1404 struct SLink* prv = NULL;
1406 for (tmp = *list; tmp; tmp = tmp->next) {
1407 if (tmp->value.cptr == cptr) {
1409 prv->next = tmp->next;
1420 * This function sets a Client's server notices mask, according to
1421 * the parameter 'what'. This could be even faster, but the code
1422 * gets mighty hard to read :)
1424 void set_snomask(struct Client *cptr, unsigned int newmask, int what)
1426 unsigned int oldmask, diffmask; /* unsigned please */
1430 oldmask = cptr->snomask;
1432 if (what == SNO_ADD)
1434 else if (what == SNO_DEL)
1435 newmask = oldmask & ~newmask;
1436 else if (what != SNO_SET) /* absolute set, no math needed */
1437 sendto_ops("setsnomask called with %d ?!", what);
1439 newmask &= (IsAnOper(cptr) ? SNO_ALL : SNO_USER);
1441 diffmask = oldmask ^ newmask;
1443 for (i = 0; diffmask >> i; i++) {
1444 if (((diffmask >> i) & 1))
1446 if (((newmask >> i) & 1))
1449 tmp->next = opsarray[i];
1450 tmp->value.cptr = cptr;
1454 /* not real portable :( */
1455 delfrom_list(cptr, &opsarray[i]);
1458 cptr->snomask = newmask;
1462 * is_silenced : Does the actual check wether sptr is allowed
1463 * to send a message to acptr.
1464 * Both must be registered persons.
1465 * If sptr is silenced by acptr, his message should not be propagated,
1466 * but more over, if this is detected on a server not local to sptr
1467 * the SILENCE mask is sent upstream.
1469 int is_silenced(struct Client *sptr, struct Client *acptr)
1473 static char sender[HOSTLEN + NICKLEN + USERLEN + 5];
1474 static char senderip[16 + NICKLEN + USERLEN + 5];
1476 if (!(acptr->user) || !(lp = acptr->user->silence) || !(user = sptr->user))
1478 sprintf_irc(sender, "%s!%s@%s", sptr->name, user->username, user->host);
1479 sprintf_irc(senderip, "%s!%s@%s", sptr->name, user->username,
1480 ircd_ntoa((const char*) &sptr->ip));
1481 for (; lp; lp = lp->next)
1483 if ((!(lp->flags & CHFL_SILENCE_IPMASK) && !match(lp->value.cp, sender)) ||
1484 ((lp->flags & CHFL_SILENCE_IPMASK) && !match(lp->value.cp, senderip)))
1486 if (!MyConnect(sptr))
1488 if (Protocol(sptr->from) < 10)
1489 sendto_one(sptr->from, ":%s SILENCE %s %s", acptr->name,
1490 sptr->name, lp->value.cp);
1492 sendto_one(sptr->from, ":%s SILENCE %s%s %s", acptr->name,
1493 NumNick(sptr), lp->value.cp);
1504 * Removes all silence masks from the list of sptr that fall within `mask'
1505 * Returns -1 if none where found, 0 otherwise.
1507 int del_silence(struct Client *sptr, char *mask)
1513 for (lp = &sptr->user->silence; *lp;) {
1514 if (!mmatch(mask, (*lp)->value.cp))
1518 MyFree(tmp->value.cp);
1528 int add_silence(struct Client* sptr, const char* mask)
1530 struct SLink *lp, **lpp;
1531 int cnt = 0, len = strlen(mask);
1534 for (lpp = &sptr->user->silence, lp = *lpp; lp;)
1536 if (0 == ircd_strcmp(mask, lp->value.cp))
1538 if (!mmatch(mask, lp->value.cp))
1540 struct SLink *tmp = lp;
1541 *lpp = lp = lp->next;
1542 MyFree(tmp->value.cp);
1548 len += strlen(lp->value.cp);
1549 if ((len > MAXSILELENGTH) || (++cnt >= MAXSILES))
1551 sendto_one(sptr, err_str(ERR_SILELISTFULL), me.name, sptr->name, mask);
1554 else if (!mmatch(lp->value.cp, mask))
1561 memset(lp, 0, sizeof(struct SLink));
1562 lp->next = sptr->user->silence;
1563 lp->value.cp = (char*) MyMalloc(strlen(mask) + 1);
1564 assert(0 != lp->value.cp);
1565 strcpy(lp->value.cp, mask);
1566 if ((ip_start = strrchr(mask, '@')) && check_if_ipmask(ip_start + 1))
1567 lp->flags = CHFL_SILENCE_IPMASK;
1568 sptr->user->silence = lp;