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.
24 * @brief Miscellaneous user-related helper functions.
36 #include "ircd_alloc.h"
37 #include "ircd_chattr.h"
38 #include "ircd_features.h"
40 #include "ircd_reply.h"
41 #include "ircd_snprintf.h"
42 #include "ircd_string.h"
51 #include "querycmds.h"
58 #include "s_serv.h" /* max_client_count */
62 #include "supported.h"
68 #include "handlers.h" /* m_motd and m_lusers */
70 /* #include <assert.h> -- Now using assert in ircd_log.h */
77 /** Count of allocated User structures. */
78 static int userCount = 0;
80 /** Makes sure that \a cptr has a User information block.
81 * If cli_user(cptr) != NULL, does nothing.
82 * @param[in] cptr Client to attach User struct to.
83 * @return User struct associated with \a cptr.
85 struct User *make_user(struct Client *cptr)
89 if (!cli_user(cptr)) {
90 cli_user(cptr) = (struct User*) MyMalloc(sizeof(struct User));
91 assert(0 != cli_user(cptr));
93 /* All variables are 0 by default */
94 memset(cli_user(cptr), 0, sizeof(struct User));
96 cli_user(cptr)->refcnt = 1;
98 return cli_user(cptr);
101 /** Dereference \a user.
102 * User structures are reference-counted; if the refcount of \a user
103 * becomes zero, free it.
104 * @param[in] user User to dereference.
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);
127 /** Find number of User structs allocated and memory used by them.
128 * @param[out] count_out Receives number of User structs allocated.
129 * @param[out] bytes_out Receives number of bytes used by User structs.
131 void user_count_memory(size_t* count_out, size_t* bytes_out)
133 assert(0 != count_out);
134 assert(0 != bytes_out);
135 *count_out = userCount;
136 *bytes_out = userCount * sizeof(struct User);
140 /** Find the next client (starting at \a next) with a name that matches \a ch.
141 * Normal usage loop is:
142 * for (x = client; x = next_client(x,mask); x = x->next)
143 * HandleMatchingClient;
145 * @param[in] next First client to check.
146 * @param[in] ch Name mask to check against.
147 * @return Next matching client found, or NULL if none.
149 struct Client *next_client(struct Client *next, const char* ch)
151 struct Client *tmp = next;
156 next = FindClient(ch);
157 next = next ? next : tmp;
158 if (cli_prev(tmp) == next)
162 for (; next; next = cli_next(next))
163 if (!match(ch, cli_name(next)))
168 /** Find the destination server for a command, and forward it if that is not us.
170 * \a server may be a nickname, server name, server mask (if \a from
171 * is a local user) or server numnick (if \a is a server or remote
174 * @param[in] from Client that sent the command to us.
175 * @param[in] cmd Long-form command text.
176 * @param[in] tok Token-form command text.
177 * @param[in] one Client that originated the command (ignored).
178 * @param[in] MustBeOper If non-zero and \a from is not an operator, return HUNTED_NOSUCH.
179 * @param[in] pattern Format string of arguments to command.
180 * @param[in] server Index of target name or mask in \a parv.
181 * @param[in] parc Number of valid elements in \a parv (must be less than 9).
182 * @param[in] parv Array of arguments to command.
183 * @return One of HUNTED_ISME, HUNTED_NOSUCH or HUNTED_PASS.
185 int hunt_server_cmd(struct Client *from, const char *cmd, const char *tok,
186 struct Client *one, int MustBeOper, const char *pattern,
187 int server, int parc, char *parv[])
189 struct Client *acptr;
192 /* Assume it's me, if no server or an unregistered client */
193 if (parc <= server || EmptyString((to = parv[server])) || IsUnknown(from))
194 return (HUNTED_ISME);
196 if (MustBeOper && !IsPrivileged(from))
198 send_reply(from, ERR_NOPRIVILEGES);
199 return HUNTED_NOSUCH;
202 /* Make sure it's a server */
204 /* Make sure it's a server */
205 if (!strchr(to, '*')) {
206 if (0 == (acptr = FindClient(to))) {
207 send_reply(from, ERR_NOSUCHSERVER, to);
208 return HUNTED_NOSUCH;
212 acptr = cli_user(acptr)->server;
213 } else if (!(acptr = find_match_server(to))) {
214 send_reply(from, ERR_NOSUCHSERVER, to);
215 return (HUNTED_NOSUCH);
217 } else if (!(acptr = FindNServer(to))) {
218 send_reply(from, SND_EXPLICIT | ERR_NOSUCHSERVER, "* :Server has disconnected");
219 return (HUNTED_NOSUCH); /* Server broke off in the meantime */
223 return (HUNTED_ISME);
225 if (MustBeOper && !IsPrivileged(from)) {
226 send_reply(from, ERR_NOPRIVILEGES);
227 return HUNTED_NOSUCH;
230 /* assert(!IsServer(from)); */
232 parv[server] = (char *) acptr; /* HACK! HACK! HACK! ARGH! */
234 sendcmdto_one(from, cmd, tok, acptr, pattern, parv[1], parv[2], parv[3],
235 parv[4], parv[5], parv[6], parv[7], parv[8]);
237 return (HUNTED_PASS);
240 /** Find the destination server for a command, and forward it (as a
241 * high-priority command) if that is not us.
243 * \a server may be a nickname, server name, server mask (if \a from
244 * is a local user) or server numnick (if \a is a server or remote
246 * Unlike hunt_server_cmd(), this appends the message to the
247 * high-priority message queue for the destination server.
249 * @param[in] from Client that sent the command to us.
250 * @param[in] cmd Long-form command text.
251 * @param[in] tok Token-form command text.
252 * @param[in] one Client that originated the command (ignored).
253 * @param[in] MustBeOper If non-zero and \a from is not an operator, return HUNTED_NOSUCH.
254 * @param[in] pattern Format string of arguments to command.
255 * @param[in] server Index of target name or mask in \a parv.
256 * @param[in] parc Number of valid elements in \a parv (must be less than 9).
257 * @param[in] parv Array of arguments to command.
258 * @return One of HUNTED_ISME, HUNTED_NOSUCH or HUNTED_PASS.
260 int hunt_server_prio_cmd(struct Client *from, const char *cmd, const char *tok,
261 struct Client *one, int MustBeOper,
262 const char *pattern, int server, int parc,
265 struct Client *acptr;
268 /* Assume it's me, if no server or an unregistered client */
269 if (parc <= server || EmptyString((to = parv[server])) || IsUnknown(from))
270 return (HUNTED_ISME);
272 /* Make sure it's a server */
274 /* Make sure it's a server */
275 if (!strchr(to, '*')) {
276 if (0 == (acptr = FindClient(to))) {
277 send_reply(from, ERR_NOSUCHSERVER, to);
278 return HUNTED_NOSUCH;
282 acptr = cli_user(acptr)->server;
283 } else if (!(acptr = find_match_server(to))) {
284 send_reply(from, ERR_NOSUCHSERVER, to);
285 return (HUNTED_NOSUCH);
287 } else if (!(acptr = FindNServer(to)))
288 return (HUNTED_NOSUCH); /* Server broke off in the meantime */
291 return (HUNTED_ISME);
293 if (MustBeOper && !IsPrivileged(from)) {
294 send_reply(from, ERR_NOPRIVILEGES);
295 return HUNTED_NOSUCH;
298 /* assert(!IsServer(from)); SETTIME to particular destinations permitted */
300 parv[server] = (char *) acptr; /* HACK! HACK! HACK! ARGH! */
302 sendcmdto_prio_one(from, cmd, tok, acptr, pattern, parv[1], parv[2], parv[3],
303 parv[4], parv[5], parv[6], parv[7], parv[8]);
305 return (HUNTED_PASS);
312 * This function is called when both NICK and USER messages
313 * have been accepted for the client, in whatever order. Only
314 * after this the USER message is propagated.
316 * NICK's must be propagated at once when received, although
317 * it would be better to delay them too until full info is
318 * available. Doing it is not so simple though, would have
319 * to implement the following:
321 * 1) user telnets in and gives only "NICK foobar" and waits
322 * 2) another user far away logs in normally with the nick
323 * "foobar" (quite legal, as this server didn't propagate it).
324 * 3) now this server gets nick "foobar" from outside, but
325 * has already the same defined locally. Current server
326 * would just issue "KILL foobar" to clean out dups. But,
327 * this is not fair. It should actually request another
328 * nick from local user or kill him/her...
330 /** Finish registering a user who has sent both NICK and USER.
331 * For local connections, possibly check IAuth; make sure there is a
332 * matching Client config block; clean the username field; check
333 * K/k-lines; check for "hacked" looking usernames; assign a numnick;
334 * and send greeting (WELCOME, ISUPPORT, MOTD, etc).
335 * For all connections, update the invisible user and operator counts;
336 * run IPcheck against their address; and forward the NICK.
338 * @param[in] cptr Client who introduced the user.
339 * @param[in,out] sptr Client who has been fully introduced.
340 * @return Zero or CPTR_KILLED.
342 int register_user(struct Client *cptr, struct Client *sptr)
346 struct User* user = cli_user(sptr);
349 user->last = CurrentTime;
350 parv[0] = cli_name(sptr);
351 parv[1] = parv[2] = NULL;
355 assert(cptr == sptr);
357 Count_unknownbecomesclient(sptr, UserStats);
360 * Set user's initial modes
362 tmpstr = (char*)client_get_default_umode(sptr);
364 char *umodev[] = { NULL, NULL, NULL, NULL };
366 set_user_mode(cptr, sptr, 3, umodev, ALLOWMODES_ANY);
370 cli_handler(sptr) = CLIENT_HANDLER;
371 SetLocalNumNick(sptr);
374 feature_str(FEAT_NETWORK),
375 feature_str(FEAT_PROVIDER) ? " via " : "",
376 feature_str(FEAT_PROVIDER) ? feature_str(FEAT_PROVIDER) : "",
379 * This is a duplicate of the NOTICE but see below...
381 send_reply(sptr, RPL_YOURHOST, cli_name(&me), version);
382 send_reply(sptr, RPL_CREATED, creation);
383 send_reply(sptr, RPL_MYINFO, cli_name(&me), version, infousermodes,
384 infochanmodes, infochanmodeswithparams);
385 send_supported(sptr);
386 m_lusers(sptr, sptr, 1, parv);
389 if (cli_snomask(sptr) & SNO_NOISY)
390 set_snomask(sptr, cli_snomask(sptr) & SNO_NOISY, SNO_ADD);
391 if (feature_bool(FEAT_CONNEXIT_NOTICES))
392 sendto_opmask_butone(0, SNO_CONNEXIT,
393 "Client connecting: %s (%s@%s) [%s] {%s} [%s] <%s%s>",
394 cli_name(sptr), user->username, user->host,
395 cli_sock_ip(sptr), get_client_class(sptr),
396 cli_info(sptr), NumNick(cptr) /* two %s's */);
398 IPcheck_connect_succeeded(sptr);
400 if(cli_connect(sptr)->con_ssl) {
403 const char *cipher = ssl_get_cipher(cli_connect(sptr)->con_ssl);
404 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :You are connected to %s with %s", sptr, cli_name(&me), cipher);
408 struct Client *acptr = user->server;
410 if (cli_from(acptr) != cli_from(sptr))
412 sendcmdto_one(&me, CMD_KILL, cptr, "%C :%s (%s != %s[%s])",
413 sptr, cli_name(&me), cli_name(user->server), cli_name(cli_from(acptr)),
414 cli_sockhost(cli_from(acptr)));
415 SetFlag(sptr, FLAG_KILLED);
416 return exit_client(cptr, sptr, &me, "NICK server wrong direction");
418 else if (HasFlag(acptr, FLAG_TS8))
419 SetFlag(sptr, FLAG_TS8);
422 * Check to see if this user is being propagated
423 * as part of a net.burst, or is using protocol 9.
424 * FIXME: This can be sped up - its stupid to check it for
425 * every NICK message in a burst again --Run.
427 for (; acptr != &me; acptr = cli_serv(acptr)->up)
429 if (IsBurst(acptr) || Protocol(acptr) < 10)
432 if (!IPcheck_remote_connect(sptr, (acptr != &me)))
435 * We ran out of bits to count this
437 sendcmdto_one(&me, CMD_KILL, sptr, "%C :%s (Too many connections from your host -- Ghost)",
438 sptr, cli_name(&me));
439 return exit_client(cptr, sptr, &me,"Too many connections from your host -- throttled");
444 /* If they get both +x and an account during registration, hide
445 * their hostmask here. Calling hide_hostmask() from IAuth's
446 * account assignment causes a numeric reply during registration.
448 if (HasHiddenHost(sptr))
449 hide_hostmask(sptr, FLAG_HIDDENHOST);
450 if (IsInvisible(sptr))
451 ++UserStats.inv_clients;
455 tmpstr = umode_str(sptr);
456 /* Send full IP address to IPv6-grokking servers. */
457 sendcmdto_flag_serv_butone(user->server, CMD_NICK, cptr,
458 FLAG_IPV6, FLAG_LAST_FLAG,
459 "%s %d %Tu %s %s %s%s%s%s %s%s :%s",
460 cli_name(sptr), cli_hopcount(sptr) + 1,
462 user->username, user->realhost,
463 *tmpstr ? "+" : "", tmpstr, *tmpstr ? " " : "",
464 iptobase64(ip_base64, &cli_ip(sptr), sizeof(ip_base64), 1),
465 NumNick(sptr), cli_info(sptr));
466 /* Send fake IPv6 addresses to pre-IPv6 servers. */
467 sendcmdto_flag_serv_butone(user->server, CMD_NICK, cptr,
468 FLAG_LAST_FLAG, FLAG_IPV6,
469 "%s %d %Tu %s %s %s%s%s%s %s%s :%s",
470 cli_name(sptr), cli_hopcount(sptr) + 1,
472 user->username, user->realhost,
473 *tmpstr ? "+" : "", tmpstr, *tmpstr ? " " : "",
474 iptobase64(ip_base64, &cli_ip(sptr), sizeof(ip_base64), 0),
475 NumNick(sptr), cli_info(sptr));
477 /* Send user mode to client */
480 static struct Flags flags; /* automatically initialized to zeros */
481 /* To avoid sending +r to the client due to auth-on-connect, set
482 * the "old" FLAG_ACCOUNT bit to match the client's value.
485 FlagSet(&flags, FLAG_ACCOUNT);
487 FlagClr(&flags, FLAG_ACCOUNT);
488 client_set_privs(sptr, NULL);
489 send_umode(cptr, sptr, &flags, ALL_UMODES);
490 if ((cli_snomask(sptr) != SNO_DEFAULT) && HasFlag(sptr, FLAG_SERVNOTICE))
491 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
496 /** List of user mode characters. */
497 static const struct UserMode {
498 unsigned int flag; /**< User mode constant. */
499 char c; /**< Character corresponding to the mode. */
503 { FLAG_INVISIBLE, 'i' },
504 { FLAG_WALLOP, 'w' },
505 { FLAG_SERVNOTICE, 's' },
507 { FLAG_CHSERV, 'k' },
509 { FLAG_ACCOUNT, 'r' },
510 { FLAG_HIDDENHOST, 'x' },
511 { FLAG_SSLCONN, 'S' }
514 /** Length of #userModeList. */
515 #define USERMODELIST_SIZE sizeof(userModeList) / sizeof(struct UserMode)
518 * XXX - find a way to get rid of this
520 /** Nasty global buffer used for communications with umode_str() and others. */
521 static char umodeBuf[BUFSIZE];
523 /** Try to set a user's nickname.
524 * If \a sptr is a server, the client is being introduced for the first time.
525 * @param[in] cptr Client to set nickname.
526 * @param[in] sptr Client sending the NICK.
527 * @param[in] nick New nickname.
528 * @param[in] parc Number of arguments to NICK.
529 * @param[in] parv Argument list to NICK.
530 * @return CPTR_KILLED if \a cptr was killed, else 0.
532 int set_nick_name(struct Client* cptr, struct Client* sptr,
533 const char* nick, int parc, char* parv[])
535 if (IsServer(sptr)) {
538 * A server introducing a new client, change source
540 struct Client* new_client = make_client(cptr, STAT_UNKNOWN);
541 assert(0 != new_client);
543 cli_hopcount(new_client) = atoi(parv[2]);
544 cli_lastnick(new_client) = atoi(parv[3]);
549 strcpy(cli_name(new_client), nick);
550 cli_user(new_client) = make_user(new_client);
551 cli_user(new_client)->server = sptr;
552 SetRemoteNumNick(new_client, parv[parc - 2]);
554 * IP# of remote client
556 base64toip(parv[parc - 3], &cli_ip(new_client));
558 add_client_to_list(new_client);
559 hAddClient(new_client);
561 cli_serv(sptr)->ghost = 0; /* :server NICK means end of net.burst */
562 ircd_strncpy(cli_username(new_client), parv[4], USERLEN);
563 ircd_strncpy(cli_user(new_client)->username, parv[4], USERLEN);
564 ircd_strncpy(cli_user(new_client)->host, parv[5], HOSTLEN);
565 ircd_strncpy(cli_user(new_client)->realhost, parv[5], HOSTLEN);
566 ircd_strncpy(cli_info(new_client), parv[parc - 1], REALLEN);
568 Count_newremoteclient(UserStats, sptr);
570 if (parc > 7 && *parv[6] == '+') {
571 /* (parc-4) -3 for the ip, numeric nick, realname */
572 set_user_mode(cptr, new_client, parc-7, parv+4, ALLOWMODES_ANY);
575 return register_user(cptr, new_client);
577 else if ((cli_name(sptr))[0]) {
579 * Client changing its nick
581 * If the client belongs to me, then check to see
582 * if client is on any channels where it is currently
583 * banned. If so, do not allow the nick change to occur.
586 const char* channel_name;
587 struct Membership *member;
588 if ((channel_name = find_no_nickchange_channel(sptr))) {
589 return send_reply(cptr, ERR_BANNICKCHANGE, channel_name);
592 * Refuse nick change if the last nick change was less
593 * then 30 seconds ago. This is intended to get rid of
594 * clone bots doing NICK FLOOD. -SeKs
595 * If someone didn't change their nick for more then 60 seconds
596 * however, allow to do two nick changes immediately after another
597 * before limiting the nick flood. -Run
599 if (CurrentTime < cli_nextnick(cptr))
601 cli_nextnick(cptr) += 2;
602 send_reply(cptr, ERR_NICKTOOFAST, parv[1],
603 cli_nextnick(cptr) - CurrentTime);
604 /* Send error message */
605 sendcmdto_one(cptr, CMD_NICK, cptr, "%s", cli_name(cptr));
606 /* bounce NICK to user */
607 return 0; /* ignore nick change! */
610 /* Limit total to 1 change per NICK_DELAY seconds: */
611 cli_nextnick(cptr) += NICK_DELAY;
612 /* However allow _maximal_ 1 extra consecutive nick change: */
613 if (cli_nextnick(cptr) < CurrentTime)
614 cli_nextnick(cptr) = CurrentTime;
616 /* Invalidate all bans against the user so we check them again */
617 for (member = (cli_user(cptr))->channel; member;
618 member = member->next_channel)
619 ClearBanValid(member);
622 * Also set 'lastnick' to current time, if changed.
624 if (0 != ircd_strcmp(parv[0], nick))
625 cli_lastnick(sptr) = (sptr == cptr) ? TStime() : atoi(parv[2]);
628 * Client just changing his/her nick. If he/she is
629 * on a channel, send note of change to all clients
630 * on that channel. Propagate notice to other servers.
633 sendcmdto_common_channels_butone(sptr, CMD_NICK, NULL, ":%s", nick);
634 add_history(sptr, 1);
635 sendcmdto_serv_butone(sptr, CMD_NICK, cptr, "%s %Tu", nick,
639 sendcmdto_one(sptr, CMD_NICK, sptr, ":%s", nick);
641 if ((cli_name(sptr))[0])
643 strcpy(cli_name(sptr), nick);
647 /* Local client setting NICK the first time */
648 strcpy(cli_name(sptr), nick);
650 return auth_set_nick(cli_auth(sptr), nick);
655 /** Calculate the hash value for a target.
656 * @param[in] target Pointer to target, cast to unsigned int.
657 * @return Hash value constructed from the pointer.
659 static unsigned char hash_target(unsigned int target)
661 return (unsigned char) (target >> 16) ^ (target >> 8);
664 /** Records \a target as a recent target for \a sptr.
665 * @param[in] sptr User who has sent to a new target.
666 * @param[in] target Target to add.
669 add_target(struct Client *sptr, void *target)
671 /* Ok, this shouldn't work esp on alpha
673 unsigned char hash = hash_target((unsigned long) target);
674 unsigned char* targets;
677 assert(cli_local(sptr));
679 targets = cli_targets(sptr);
684 for (i = 0; i < MAXTARGETS; ++i) {
685 if (targets[i] == hash)
691 memmove(&targets[RESERVEDTARGETS + 1],
692 &targets[RESERVEDTARGETS], MAXTARGETS - RESERVEDTARGETS - 1);
693 targets[RESERVEDTARGETS] = hash;
696 /** Check whether \a sptr can send to or join \a target yet.
697 * @param[in] sptr User trying to join a channel or send a message.
698 * @param[in] target Target of the join or message.
699 * @param[in] name Name of the target.
700 * @param[in] created If non-zero, trying to join a new channel.
701 * @return Non-zero if too many target changes; zero if okay to send.
703 int check_target_limit(struct Client *sptr, void *target, const char *name,
706 unsigned char hash = hash_target((unsigned long) target);
708 unsigned char* targets;
711 assert(cli_local(sptr));
712 targets = cli_targets(sptr);
715 * Same target as last time?
717 if (targets[0] == hash)
719 for (i = 1; i < MAXTARGETS; ++i) {
720 if (targets[i] == hash) {
721 memmove(&targets[1], &targets[0], i);
730 if (CurrentTime < cli_nexttarget(sptr)) {
731 /* If user is invited to channel, give him/her a free target */
732 if (IsChannelName(name) && IsInvited(sptr, target))
735 if (cli_nexttarget(sptr) - CurrentTime < TARGET_DELAY + 8) {
739 cli_nexttarget(sptr) += 2;
740 send_reply(sptr, ERR_TARGETTOOFAST, name,
741 cli_nexttarget(sptr) - CurrentTime);
746 cli_nexttarget(sptr) += TARGET_DELAY;
747 if (cli_nexttarget(sptr) < CurrentTime - (TARGET_DELAY * (MAXTARGETS - 1)))
748 cli_nexttarget(sptr) = CurrentTime - (TARGET_DELAY * (MAXTARGETS - 1));
751 memmove(&targets[1], &targets[0], MAXTARGETS - 1);
756 /** Allows a channel operator to avoid target change checks when
757 * sending messages to users on their channel.
758 * @param[in] source User sending the message.
759 * @param[in] nick Destination of the message.
760 * @param[in] channel Name of channel being sent to.
761 * @param[in] text Message to send.
762 * @param[in] is_notice If non-zero, use CNOTICE instead of CPRIVMSG.
764 /* Added 971023 by Run. */
765 int whisper(struct Client* source, const char* nick, const char* channel,
766 const char* text, int is_notice)
769 struct Channel* chptr;
770 struct Membership* membership;
774 assert(0 != channel);
775 assert(MyUser(source));
777 if (!(dest = FindUser(nick))) {
778 return send_reply(source, ERR_NOSUCHNICK, nick);
780 if (!(chptr = FindChannel(channel))) {
781 return send_reply(source, ERR_NOSUCHCHANNEL, channel);
784 * compare both users channel lists, instead of the channels user list
785 * since the link is the same, this should be a little faster for channels
786 * with a lot of users
788 for (membership = cli_user(source)->channel; membership; membership = membership->next_channel) {
789 if (chptr == membership->channel)
792 if (0 == membership) {
793 return send_reply(source, ERR_NOTONCHANNEL, chptr->chname);
795 if (!IsVoicedOrOpped(membership)) {
796 return send_reply(source, ERR_VOICENEEDED, chptr->chname);
799 * lookup channel in destination
801 assert(0 != cli_user(dest));
802 for (membership = cli_user(dest)->channel; membership; membership = membership->next_channel) {
803 if (chptr == membership->channel)
806 if (0 == membership || IsZombie(membership)) {
807 return send_reply(source, ERR_USERNOTINCHANNEL, cli_name(dest), chptr->chname);
809 if (is_silenced(source, dest))
813 sendcmdto_one(source, CMD_NOTICE, dest, "%C :%s", dest, text);
816 if (cli_user(dest)->away)
817 send_reply(source, RPL_AWAY, cli_name(dest), cli_user(dest)->away);
818 sendcmdto_one(source, CMD_PRIVATE, dest, "%C :%s", dest, text);
824 /** Send a user mode change for \a cptr to neighboring servers.
825 * @param[in] cptr User whose mode is changing.
826 * @param[in] sptr Client who sent us the mode change message.
827 * @param[in] old Prior set of user flags.
828 * @param[in] prop If non-zero, also include FLAG_OPER.
830 void send_umode_out(struct Client *cptr, struct Client *sptr,
831 struct Flags *old, int prop)
834 struct Client *acptr;
836 send_umode(NULL, sptr, old, prop ? SEND_UMODES : SEND_UMODES_BUT_OPER);
838 for (i = HighestFd; i >= 0; i--)
840 if ((acptr = LocalClientArray[i]) && IsServer(acptr) &&
841 (acptr != cptr) && (acptr != sptr) && *umodeBuf)
842 sendcmdto_one(sptr, CMD_MODE, acptr, "%s :%s", cli_name(sptr), umodeBuf);
844 if (cptr && MyUser(cptr))
845 send_umode(cptr, sptr, old, ALL_UMODES);
849 /** Call \a fmt for each Client named in \a names.
850 * @param[in] sptr Client requesting information.
851 * @param[in] names Space-delimited list of nicknames.
852 * @param[in] rpl Base reply string for messages.
853 * @param[in] fmt Formatting callback function.
855 void send_user_info(struct Client* sptr, char* names, int rpl, InfoFormatter fmt)
861 struct Client* acptr;
868 mb = msgq_make(sptr, rpl_str(rpl), cli_name(&me), cli_name(sptr));
870 for (name = ircd_strtok(&p, names, " "); name; name = ircd_strtok(&p, 0, " ")) {
871 if ((acptr = FindUser(name))) {
873 msgq_append(0, mb, " ");
874 (*fmt)(acptr, sptr, mb);
876 if (5 == ++arg_count)
879 send_buffer(sptr, mb, 0);
883 /** Set \a flag on \a cptr and possibly hide the client's hostmask.
884 * @param[in,out] cptr User who is getting a new flag.
885 * @param[in] flag Some flag that affects host-hiding (FLAG_HIDDENHOST, FLAG_ACCOUNT).
889 hide_hostmask(struct Client *cptr, unsigned int flag)
891 struct Membership *chan;
894 case FLAG_HIDDENHOST:
895 /* Local users cannot set +x unless FEAT_HOST_HIDING is true. */
896 if (MyConnect(cptr) && !feature_bool(FEAT_HOST_HIDING))
900 /* Invalidate all bans against the user so we check them again */
901 for (chan = (cli_user(cptr))->channel; chan;
902 chan = chan->next_channel)
910 if (!HasFlag(cptr, FLAG_HIDDENHOST) || !HasFlag(cptr, FLAG_ACCOUNT))
913 sendcmdto_common_channels_butone(cptr, CMD_QUIT, cptr, ":Registered");
914 ircd_snprintf(0, cli_user(cptr)->host, HOSTLEN, "%s.%s",
915 cli_user(cptr)->account, feature_str(FEAT_HIDDEN_HOST));
917 /* ok, the client is now fully hidden, so let them know -- hikari */
919 send_reply(cptr, RPL_HOSTHIDDEN, cli_user(cptr)->host);
922 * Go through all channels the client was on, rejoin him
923 * and set the modes, if any
925 for (chan = cli_user(cptr)->channel; chan; chan = chan->next_channel)
929 /* Send a JOIN unless the user's join has been delayed. */
930 if (!IsDelayedJoin(chan))
931 sendcmdto_channel_butserv_butone(cptr, CMD_JOIN, chan->channel, cptr, 0,
932 "%H", chan->channel);
933 if (IsChanOp(chan) && HasVoice(chan))
934 sendcmdto_channel_butserv_butone(&his, CMD_MODE, chan->channel, cptr, 0,
935 "%H +ov %C %C", chan->channel, cptr,
937 else if (IsChanOp(chan) || HasVoice(chan))
938 sendcmdto_channel_butserv_butone(&his, CMD_MODE, chan->channel, cptr, 0,
939 "%H +%c %C", chan->channel, IsChanOp(chan) ? 'o' : 'v', cptr);
944 /** Set a user's mode. This function checks that \a cptr is trying to
945 * set his own mode, prevents local users from setting inappropriate
946 * modes through this function, and applies any other side effects of
947 * a successful mode change.
949 * @param[in,out] cptr User setting someone's mode.
950 * @param[in] sptr Client who sent the mode change message.
951 * @param[in] parc Number of parameters in \a parv.
952 * @param[in] parv Parameters to MODE.
953 * @param[in] allow_modes ALLOWMODES_ANY for any mode, ALLOWMODES_DEFAULT for
954 * only permitting legitimate default user modes.
957 int set_user_mode(struct Client *cptr, struct Client *sptr, int parc,
958 char *parv[], int allow_modes)
964 struct Flags setflags;
965 unsigned int tmpmask = 0;
966 int snomask_given = 0;
969 int do_host_hiding = 0;
970 char* account = NULL;
978 for (i = 0; i < USERMODELIST_SIZE; i++)
980 if (HasFlag(sptr, userModeList[i].flag) &&
981 userModeList[i].flag != FLAG_ACCOUNT)
982 *m++ = userModeList[i].c;
985 send_reply(sptr, RPL_UMODEIS, buf);
986 if (HasFlag(sptr, FLAG_SERVNOTICE) && MyConnect(sptr)
987 && cli_snomask(sptr) !=
988 (unsigned int)(IsOper(sptr) ? SNO_OPERDEFAULT : SNO_DEFAULT))
989 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
994 * find flags already set for user
995 * why not just copy them?
997 setflags = cli_flags(sptr);
1000 tmpmask = cli_snomask(sptr);
1003 * parse mode change string(s)
1005 for (p = &parv[2]; *p && p<&parv[parc]; p++) { /* p is changed in loop too */
1006 for (m = *p; *m; m++) {
1015 if (*(p + 1) && is_snomask(*(p + 1))) {
1017 tmpmask = umode_make_snomask(tmpmask, *++p, what);
1018 tmpmask &= (IsAnOper(sptr) ? SNO_ALL : SNO_USER);
1021 tmpmask = (what == MODE_ADD) ?
1022 (IsAnOper(sptr) ? SNO_OPERDEFAULT : SNO_DEFAULT) : 0;
1024 SetServNotice(sptr);
1026 ClearServNotice(sptr);
1029 if (what == MODE_ADD)
1035 if (what == MODE_ADD)
1038 ClrFlag(sptr, FLAG_OPER);
1039 ClrFlag(sptr, FLAG_LOCOP);
1040 if (MyConnect(sptr))
1042 tmpmask = cli_snomask(sptr) & ~SNO_OPER;
1043 cli_handler(sptr) = CLIENT_HANDLER;
1048 if (what == MODE_ADD)
1052 ClrFlag(sptr, FLAG_OPER);
1053 ClrFlag(sptr, FLAG_LOCOP);
1054 if (MyConnect(sptr))
1056 tmpmask = cli_snomask(sptr) & ~SNO_OPER;
1057 cli_handler(sptr) = CLIENT_HANDLER;
1062 if (what == MODE_ADD)
1065 ClearInvisible(sptr);
1068 if (what == MODE_ADD)
1074 if (what == MODE_ADD)
1075 SetChannelService(sptr);
1077 ClearChannelService(sptr);
1080 if (what == MODE_ADD)
1086 if (what == MODE_ADD)
1089 if (what == MODE_ADD)
1096 if (*(p + 1) && (what == MODE_ADD)) {
1100 /* There is no -r */
1103 send_reply(sptr, ERR_UMODEUNKNOWNFLAG, *m);
1109 * Evaluate rules for new user mode
1110 * Stop users making themselves operators too easily:
1112 if (!IsServer(cptr))
1114 if (!FlagHas(&setflags, FLAG_OPER) && IsOper(sptr))
1116 if (!FlagHas(&setflags, FLAG_LOCOP) && IsLocOp(sptr))
1118 if (!FlagHas(&setflags, FLAG_ACCOUNT) && IsAccount(sptr))
1119 ClrFlag(sptr, FLAG_ACCOUNT);
1120 if (!FlagHas(&setflags, FLAG_SSLCONN) && IsSSLConn(sptr))
1121 ClrFlag(sptr, FLAG_SSLCONN);
1122 else if (FlagHas(&setflags, FLAG_SSLCONN) && !IsSSLConn(sptr))
1123 SetFlag(sptr, FLAG_SSLCONN);
1125 * new umode; servers can set it, local users cannot;
1126 * prevents users from /kick'ing or /mode -o'ing
1128 if (!FlagHas(&setflags, FLAG_CHSERV))
1129 ClearChannelService(sptr);
1131 * only send wallops to opers
1133 if (feature_bool(FEAT_WALLOPS_OPER_ONLY) && !IsAnOper(sptr) &&
1134 !FlagHas(&setflags, FLAG_WALLOP))
1136 if (feature_bool(FEAT_HIS_SNOTICES_OPER_ONLY) && MyConnect(sptr) &&
1137 !IsAnOper(sptr) && !FlagHas(&setflags, FLAG_SERVNOTICE))
1139 ClearServNotice(sptr);
1140 set_snomask(sptr, 0, SNO_SET);
1142 if (feature_bool(FEAT_HIS_DEBUG_OPER_ONLY) &&
1143 !IsAnOper(sptr) && !FlagHas(&setflags, FLAG_DEBUG))
1146 if (MyConnect(sptr))
1148 if ((FlagHas(&setflags, FLAG_OPER) || FlagHas(&setflags, FLAG_LOCOP)) &&
1151 det_confs_butmask(sptr, CONF_CLIENT & ~CONF_OPERATOR);
1152 client_set_privs(sptr, NULL);
1155 if (SendServNotice(sptr))
1157 if (tmpmask != cli_snomask(sptr))
1158 set_snomask(sptr, tmpmask, SNO_SET);
1159 if (cli_snomask(sptr) && snomask_given)
1160 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
1163 set_snomask(sptr, 0, SNO_SET);
1166 * Compare new flags with old flags and send string which
1167 * will cause servers to update correctly.
1169 if (!FlagHas(&setflags, FLAG_ACCOUNT) && IsAccount(sptr)) {
1170 int len = ACCOUNTLEN;
1172 if ((ts = strchr(account, ':'))) {
1173 len = (ts++) - account;
1174 cli_user(sptr)->acc_create = atoi(ts);
1175 Debug((DEBUG_DEBUG, "Received timestamped account in user mode; "
1176 "account \"%s\", timestamp %Tu", account,
1177 cli_user(sptr)->acc_create));
1179 ircd_strncpy(cli_user(sptr)->account, account, len);
1181 if (!FlagHas(&setflags, FLAG_HIDDENHOST) && do_host_hiding && allow_modes != ALLOWMODES_DEFAULT)
1182 hide_hostmask(sptr, FLAG_HIDDENHOST);
1184 if (IsRegistered(sptr)) {
1185 if (!FlagHas(&setflags, FLAG_OPER) && IsOper(sptr)) {
1188 client_set_privs(sptr, NULL); /* may set propagate privilege */
1190 /* remember propagate privilege setting */
1191 if (HasPriv(sptr, PRIV_PROPAGATE)) {
1194 if (FlagHas(&setflags, FLAG_OPER) && !IsOper(sptr)) {
1195 /* user no longer oper */
1196 assert(UserStats.opers > 0);
1198 client_set_privs(sptr, NULL); /* will clear propagate privilege */
1200 if (FlagHas(&setflags, FLAG_INVISIBLE) && !IsInvisible(sptr)) {
1201 assert(UserStats.inv_clients > 0);
1202 --UserStats.inv_clients;
1204 if (!FlagHas(&setflags, FLAG_INVISIBLE) && IsInvisible(sptr)) {
1205 ++UserStats.inv_clients;
1207 assert(UserStats.opers <= UserStats.clients + UserStats.unknowns);
1208 assert(UserStats.inv_clients <= UserStats.clients + UserStats.unknowns);
1209 send_umode_out(cptr, sptr, &setflags, prop);
1215 /** Build a mode string to describe modes for \a cptr.
1216 * @param[in] cptr Some user.
1217 * @return Pointer to a static buffer.
1219 char *umode_str(struct Client *cptr)
1221 /* Maximum string size: "owidgrx\0" */
1224 struct Flags c_flags = cli_flags(cptr);
1226 if (!HasPriv(cptr, PRIV_PROPAGATE))
1227 FlagClr(&c_flags, FLAG_OPER);
1229 for (i = 0; i < USERMODELIST_SIZE; ++i)
1231 if (FlagHas(&c_flags, userModeList[i].flag) &&
1232 userModeList[i].flag >= FLAG_GLOBAL_UMODES)
1233 *m++ = userModeList[i].c;
1236 if (IsAccount(cptr))
1238 char* t = cli_user(cptr)->account;
1241 while ((*m++ = *t++))
1244 if (cli_user(cptr)->acc_create) {
1246 Debug((DEBUG_DEBUG, "Sending timestamped account in user mode for "
1247 "account \"%s\"; timestamp %Tu", cli_user(cptr)->account,
1248 cli_user(cptr)->acc_create));
1249 ircd_snprintf(0, t = nbuf, sizeof(nbuf), ":%Tu",
1250 cli_user(cptr)->acc_create);
1251 m--; /* back up over previous nul-termination */
1252 while ((*m++ = *t++))
1259 return umodeBuf; /* Note: static buffer, gets
1260 overwritten by send_umode() */
1263 /** Send a mode change string for \a sptr to \a cptr.
1264 * @param[in] cptr Destination of mode change message.
1265 * @param[in] sptr User whose mode has changed.
1266 * @param[in] old Pre-change set of modes for \a sptr.
1267 * @param[in] sendset One of ALL_UMODES, SEND_UMODES_BUT_OPER,
1268 * SEND_UMODES, to select which changed user modes to send.
1270 void send_umode(struct Client *cptr, struct Client *sptr, struct Flags *old,
1276 int what = MODE_NULL;
1279 * Build a string in umodeBuf to represent the change in the user's
1280 * mode between the new (cli_flags(sptr)) and 'old', but skipping
1281 * the modes indicated by sendset.
1285 for (i = 0; i < USERMODELIST_SIZE; ++i)
1287 flag = userModeList[i].flag;
1288 if (FlagHas(old, flag)
1289 == HasFlag(sptr, flag))
1295 case SEND_UMODES_BUT_OPER:
1296 if (flag == FLAG_OPER)
1298 /* and fall through */
1300 if (flag < FLAG_GLOBAL_UMODES)
1304 if (FlagHas(old, flag))
1306 if (what == MODE_DEL)
1307 *m++ = userModeList[i].c;
1312 *m++ = userModeList[i].c;
1315 else /* !FlagHas(old, flag) */
1317 if (what == MODE_ADD)
1318 *m++ = userModeList[i].c;
1323 *m++ = userModeList[i].c;
1328 if (*umodeBuf && cptr)
1329 sendcmdto_one(sptr, CMD_MODE, cptr, "%s :%s", cli_name(sptr), umodeBuf);
1333 * Check to see if this resembles a sno_mask. It is if 1) there is
1334 * at least one digit and 2) The first digit occurs before the first
1335 * alphabetic character.
1336 * @param[in] word Word to check for sno_mask-ness.
1337 * @return Non-zero if \a word looks like a server notice mask; zero if not.
1339 int is_snomask(char *word)
1343 for (; *word; word++)
1346 else if (IsAlpha(*word))
1352 /** Update snomask \a oldmask according to \a arg and \a what.
1353 * @param[in] oldmask Original user mask.
1354 * @param[in] arg Update string (either a number or '+'/'-' followed by a number).
1355 * @param[in] what MODE_ADD if adding the mask.
1356 * @return New value of service notice mask.
1358 unsigned int umode_make_snomask(unsigned int oldmask, char *arg, int what)
1360 unsigned int sno_what;
1361 unsigned int newmask;
1365 if (what == MODE_ADD)
1370 else if (*arg == '-')
1373 if (what == MODE_ADD)
1379 sno_what = (what == MODE_ADD) ? SNO_SET : SNO_DEL;
1380 /* pity we don't have strtoul everywhere */
1381 newmask = (unsigned int)atoi(arg);
1382 if (sno_what == SNO_DEL)
1383 newmask = oldmask & ~newmask;
1384 else if (sno_what == SNO_ADD)
1389 /** Remove \a cptr from the singly linked list \a list.
1390 * @param[in] cptr Client to remove from list.
1391 * @param[in,out] list Pointer to head of list containing \a cptr.
1393 static void delfrom_list(struct Client *cptr, struct SLink **list)
1396 struct SLink* prv = NULL;
1398 for (tmp = *list; tmp; tmp = tmp->next) {
1399 if (tmp->value.cptr == cptr) {
1401 prv->next = tmp->next;
1411 /** Set \a cptr's server notice mask, according to \a what.
1412 * @param[in,out] cptr Client whose snomask is updating.
1413 * @param[in] newmask Base value for new snomask.
1414 * @param[in] what One of SNO_ADD, SNO_DEL, SNO_SET, to choose operation.
1416 void set_snomask(struct Client *cptr, unsigned int newmask, int what)
1418 unsigned int oldmask, diffmask; /* unsigned please */
1422 oldmask = cli_snomask(cptr);
1424 if (what == SNO_ADD)
1426 else if (what == SNO_DEL)
1427 newmask = oldmask & ~newmask;
1428 else if (what != SNO_SET) /* absolute set, no math needed */
1429 sendto_opmask_butone(0, SNO_OLDSNO, "setsnomask called with %d ?!", what);
1431 newmask &= (IsAnOper(cptr) ? SNO_ALL : SNO_USER);
1433 diffmask = oldmask ^ newmask;
1435 for (i = 0; diffmask >> i; i++) {
1436 if (((diffmask >> i) & 1))
1438 if (((newmask >> i) & 1))
1441 tmp->next = opsarray[i];
1442 tmp->value.cptr = cptr;
1446 /* not real portable :( */
1447 delfrom_list(cptr, &opsarray[i]);
1450 cli_snomask(cptr) = newmask;
1453 /** Check whether \a sptr is allowed to send a message to \a acptr.
1454 * If \a sptr is a remote user, it means some server has an outdated
1455 * SILENCE list for \a acptr, so send the missing SILENCE mask(s) back
1456 * in the direction of \a sptr. Skip the check if \a sptr is a server.
1457 * @param[in] sptr Client trying to send a message.
1458 * @param[in] acptr Destination of message.
1459 * @return Non-zero if \a sptr is SILENCEd by \a acptr, zero if not.
1461 int is_silenced(struct Client *sptr, struct Client *acptr)
1465 size_t buf_used, slen;
1468 if (IsServer(sptr) || !(user = cli_user(acptr))
1469 || !(found = find_ban(sptr, user->silence)))
1471 assert(!(found->flags & BAN_EXCEPTION));
1472 if (!MyConnect(sptr)) {
1473 /* Buffer positive silence to send back. */
1474 buf_used = strlen(found->banstr);
1475 memcpy(buf, found->banstr, buf_used);
1476 /* Add exceptions to buffer. */
1477 for (found = user->silence; found; found = found->next) {
1478 if (!(found->flags & BAN_EXCEPTION))
1480 slen = strlen(found->banstr);
1481 if (buf_used + slen + 4 > 400) {
1482 buf[buf_used] = '\0';
1483 sendcmdto_one(acptr, CMD_SILENCE, cli_from(sptr), "%C %s", sptr, buf);
1487 buf[buf_used++] = ',';
1488 buf[buf_used++] = '+';
1489 buf[buf_used++] = '~';
1490 memcpy(buf + buf_used, found->banstr, slen);
1493 /* Flush silence buffer. */
1495 buf[buf_used] = '\0';
1496 sendcmdto_one(acptr, CMD_SILENCE, cli_from(sptr), "%C %s", sptr, buf);
1503 /** Send RPL_ISUPPORT lines to \a cptr.
1504 * @param[in] cptr Client to send ISUPPORT to.
1508 send_supported(struct Client *cptr)
1510 char featurebuf[512];
1512 ircd_snprintf(0, featurebuf, sizeof(featurebuf), FEATURES1, FEATURESVALUES1);
1513 send_reply(cptr, RPL_ISUPPORT, featurebuf);
1514 ircd_snprintf(0, featurebuf, sizeof(featurebuf), FEATURES2, FEATURESVALUES2);
1515 send_reply(cptr, RPL_ISUPPORT, featurebuf);
1517 return 0; /* convenience return, if it's ever needed */
1520 /* vim: shiftwidth=2