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 */
61 #include "supported.h"
67 #include "handlers.h" /* m_motd and m_lusers */
69 /* #include <assert.h> -- Now using assert in ircd_log.h */
76 /** Count of allocated User structures. */
77 static int userCount = 0;
79 /** Makes sure that \a cptr has a User information block.
80 * If cli_user(cptr) != NULL, does nothing.
81 * @param[in] cptr Client to attach User struct to.
82 * @return User struct associated with \a cptr.
84 struct User *make_user(struct Client *cptr)
88 if (!cli_user(cptr)) {
89 cli_user(cptr) = (struct User*) MyMalloc(sizeof(struct User));
90 assert(0 != cli_user(cptr));
92 /* All variables are 0 by default */
93 memset(cli_user(cptr), 0, sizeof(struct User));
95 cli_user(cptr)->refcnt = 1;
97 return cli_user(cptr);
100 /** Dereference \a user.
101 * User structures are reference-counted; if the refcount of \a user
102 * becomes zero, free it.
103 * @param[in] user User to dereference.
105 void free_user(struct User* user)
108 assert(0 < user->refcnt);
110 if (--user->refcnt == 0) {
116 assert(0 == user->joined);
117 assert(0 == user->invited);
118 assert(0 == user->channel);
125 /** Find number of User structs allocated and memory used by them.
126 * @param[out] count_out Receives number of User structs allocated.
127 * @param[out] bytes_out Receives number of bytes used by User structs.
129 void user_count_memory(size_t* count_out, size_t* bytes_out)
131 assert(0 != count_out);
132 assert(0 != bytes_out);
133 *count_out = userCount;
134 *bytes_out = userCount * sizeof(struct User);
138 /** Find the next client (starting at \a next) with a name that matches \a ch.
139 * Normal usage loop is:
140 * for (x = client; x = next_client(x,mask); x = x->next)
141 * HandleMatchingClient;
143 * @param[in] next First client to check.
144 * @param[in] ch Name mask to check against.
145 * @return Next matching client found, or NULL if none.
147 struct Client *next_client(struct Client *next, const char* ch)
149 struct Client *tmp = next;
154 next = FindClient(ch);
155 next = next ? next : tmp;
156 if (cli_prev(tmp) == next)
160 for (; next; next = cli_next(next))
161 if (!match(ch, cli_name(next)))
166 /** Find the destination server for a command, and forward it if that is not us.
168 * \a server may be a nickname, server name, server mask (if \a from
169 * is a local user) or server numnick (if \a is a server or remote
172 * @param[in] from Client that sent the command to us.
173 * @param[in] cmd Long-form command text.
174 * @param[in] tok Token-form command text.
175 * @param[in] one Client that originated the command (ignored).
176 * @param[in] MustBeOper If non-zero and \a from is not an operator, return HUNTED_NOSUCH.
177 * @param[in] pattern Format string of arguments to command.
178 * @param[in] server Index of target name or mask in \a parv.
179 * @param[in] parc Number of valid elements in \a parv (must be less than 9).
180 * @param[in] parv Array of arguments to command.
181 * @return One of HUNTED_ISME, HUNTED_NOSUCH or HUNTED_PASS.
183 int hunt_server_cmd(struct Client *from, const char *cmd, const char *tok,
184 struct Client *one, int MustBeOper, const char *pattern,
185 int server, int parc, char *parv[])
187 struct Client *acptr;
190 /* Assume it's me, if no server or an unregistered client */
191 if (parc <= server || EmptyString((to = parv[server])) || IsUnknown(from))
192 return (HUNTED_ISME);
194 if (MustBeOper && !IsPrivileged(from))
196 send_reply(from, ERR_NOPRIVILEGES);
197 return HUNTED_NOSUCH;
200 /* Make sure it's a server */
202 /* Make sure it's a server */
203 if (!strchr(to, '*')) {
204 if (0 == (acptr = FindClient(to))) {
205 send_reply(from, ERR_NOSUCHSERVER, to);
206 return HUNTED_NOSUCH;
210 acptr = cli_user(acptr)->server;
211 } else if (!(acptr = find_match_server(to))) {
212 send_reply(from, ERR_NOSUCHSERVER, to);
213 return (HUNTED_NOSUCH);
215 } else if (!(acptr = FindNServer(to))) {
216 send_reply(from, SND_EXPLICIT | ERR_NOSUCHSERVER, "* :Server has disconnected");
217 return (HUNTED_NOSUCH); /* Server broke off in the meantime */
221 return (HUNTED_ISME);
223 if (MustBeOper && !IsPrivileged(from)) {
224 send_reply(from, ERR_NOPRIVILEGES);
225 return HUNTED_NOSUCH;
228 /* assert(!IsServer(from)); */
230 parv[server] = (char *) acptr; /* HACK! HACK! HACK! ARGH! */
232 sendcmdto_one(from, cmd, tok, acptr, pattern, parv[1], parv[2], parv[3],
233 parv[4], parv[5], parv[6], parv[7], parv[8]);
235 return (HUNTED_PASS);
238 /** Find the destination server for a command, and forward it (as a
239 * high-priority command) if that is not us.
241 * \a server may be a nickname, server name, server mask (if \a from
242 * is a local user) or server numnick (if \a is a server or remote
244 * Unlike hunt_server_cmd(), this appends the message to the
245 * high-priority message queue for the destination server.
247 * @param[in] from Client that sent the command to us.
248 * @param[in] cmd Long-form command text.
249 * @param[in] tok Token-form command text.
250 * @param[in] one Client that originated the command (ignored).
251 * @param[in] MustBeOper If non-zero and \a from is not an operator, return HUNTED_NOSUCH.
252 * @param[in] pattern Format string of arguments to command.
253 * @param[in] server Index of target name or mask in \a parv.
254 * @param[in] parc Number of valid elements in \a parv (must be less than 9).
255 * @param[in] parv Array of arguments to command.
256 * @return One of HUNTED_ISME, HUNTED_NOSUCH or HUNTED_PASS.
258 int hunt_server_prio_cmd(struct Client *from, const char *cmd, const char *tok,
259 struct Client *one, int MustBeOper,
260 const char *pattern, int server, int parc,
263 struct Client *acptr;
266 /* Assume it's me, if no server or an unregistered client */
267 if (parc <= server || EmptyString((to = parv[server])) || IsUnknown(from))
268 return (HUNTED_ISME);
270 /* Make sure it's a server */
272 /* Make sure it's a server */
273 if (!strchr(to, '*')) {
274 if (0 == (acptr = FindClient(to))) {
275 send_reply(from, ERR_NOSUCHSERVER, to);
276 return HUNTED_NOSUCH;
280 acptr = cli_user(acptr)->server;
281 } else if (!(acptr = find_match_server(to))) {
282 send_reply(from, ERR_NOSUCHSERVER, to);
283 return (HUNTED_NOSUCH);
285 } else if (!(acptr = FindNServer(to)))
286 return (HUNTED_NOSUCH); /* Server broke off in the meantime */
289 return (HUNTED_ISME);
291 if (MustBeOper && !IsPrivileged(from)) {
292 send_reply(from, ERR_NOPRIVILEGES);
293 return HUNTED_NOSUCH;
296 /* assert(!IsServer(from)); SETTIME to particular destinations permitted */
298 parv[server] = (char *) acptr; /* HACK! HACK! HACK! ARGH! */
300 sendcmdto_prio_one(from, cmd, tok, acptr, pattern, parv[1], parv[2], parv[3],
301 parv[4], parv[5], parv[6], parv[7], parv[8]);
303 return (HUNTED_PASS);
310 * This function is called when both NICK and USER messages
311 * have been accepted for the client, in whatever order. Only
312 * after this the USER message is propagated.
314 * NICK's must be propagated at once when received, although
315 * it would be better to delay them too until full info is
316 * available. Doing it is not so simple though, would have
317 * to implement the following:
319 * 1) user telnets in and gives only "NICK foobar" and waits
320 * 2) another user far away logs in normally with the nick
321 * "foobar" (quite legal, as this server didn't propagate it).
322 * 3) now this server gets nick "foobar" from outside, but
323 * has already the same defined locally. Current server
324 * would just issue "KILL foobar" to clean out dups. But,
325 * this is not fair. It should actually request another
326 * nick from local user or kill him/her...
328 /** Finish registering a user who has sent both NICK and USER.
329 * For local connections, possibly check IAuth; make sure there is a
330 * matching Client config block; clean the username field; check
331 * K/k-lines; check for "hacked" looking usernames; assign a numnick;
332 * and send greeting (WELCOME, ISUPPORT, MOTD, etc).
333 * For all connections, update the invisible user and operator counts;
334 * run IPcheck against their address; and forward the NICK.
336 * @param[in] cptr Client who introduced the user.
337 * @param[in,out] sptr Client who has been fully introduced.
338 * @return Zero or CPTR_KILLED.
340 int register_user(struct Client *cptr, struct Client *sptr)
344 struct User* user = cli_user(sptr);
347 user->last = CurrentTime;
348 parv[0] = cli_name(sptr);
349 parv[1] = parv[2] = NULL;
353 assert(cptr == sptr);
355 Count_unknownbecomesclient(sptr, UserStats);
358 cli_handler(sptr) = CLIENT_HANDLER;
359 SetLocalNumNick(sptr);
362 feature_str(FEAT_NETWORK),
363 feature_str(FEAT_PROVIDER) ? " via " : "",
364 feature_str(FEAT_PROVIDER) ? feature_str(FEAT_PROVIDER) : "",
367 * This is a duplicate of the NOTICE but see below...
369 send_reply(sptr, RPL_YOURHOST, cli_name(&me), version);
370 send_reply(sptr, RPL_CREATED, creation);
371 send_reply(sptr, RPL_MYINFO, cli_name(&me), version, infousermodes,
372 infochanmodes, infochanmodeswithparams);
373 send_supported(sptr);
374 m_lusers(sptr, sptr, 1, parv);
377 if (cli_snomask(sptr) & SNO_NOISY)
378 set_snomask(sptr, cli_snomask(sptr) & SNO_NOISY, SNO_ADD);
379 if (feature_bool(FEAT_CONNEXIT_NOTICES))
380 sendto_opmask_butone(0, SNO_CONNEXIT,
381 "Client connecting: %s (%s@%s) [%s] {%s} [%s] <%s%s>",
382 cli_name(sptr), user->username, user->host,
383 cli_sock_ip(sptr), get_client_class(sptr),
384 cli_info(sptr), NumNick(cptr) /* two %s's */);
386 IPcheck_connect_succeeded(sptr);
388 * Set user's initial modes
390 tmpstr = (char*)client_get_default_umode(sptr);
391 if (tmpstr) for (; *tmpstr; ++tmpstr) {
394 if (!feature_bool(FEAT_HIS_SNOTICES_OPER_ONLY)) {
396 set_snomask(sptr, SNO_DEFAULT, SNO_SET);
400 if (!feature_bool(FEAT_WALLOPS_OPER_ONLY))
410 if (!feature_bool(FEAT_HIS_DEBUG_OPER_ONLY))
417 struct Client *acptr = user->server;
419 Count_newremoteclient(UserStats, acptr);
421 if (cli_from(acptr) != cli_from(sptr))
423 sendcmdto_one(&me, CMD_KILL, cptr, "%C :%s (%s != %s[%s])",
424 sptr, cli_name(&me), cli_name(user->server), cli_name(cli_from(acptr)),
425 cli_sockhost(cli_from(acptr)));
426 SetFlag(sptr, FLAG_KILLED);
427 return exit_client(cptr, sptr, &me, "NICK server wrong direction");
429 else if (HasFlag(acptr, FLAG_TS8))
430 SetFlag(sptr, FLAG_TS8);
433 * Check to see if this user is being propagated
434 * as part of a net.burst, or is using protocol 9.
435 * FIXME: This can be sped up - its stupid to check it for
436 * every NICK message in a burst again --Run.
438 for (; acptr != &me; acptr = cli_serv(acptr)->up)
440 if (IsBurst(acptr) || Protocol(acptr) < 10)
443 if (!IPcheck_remote_connect(sptr, (acptr != &me)))
446 * We ran out of bits to count this
448 sendcmdto_one(&me, CMD_KILL, sptr, "%C :%s (Too many connections from your host -- Ghost)",
449 sptr, cli_name(&me));
450 return exit_client(cptr, sptr, &me,"Too many connections from your host -- throttled");
455 if (IsInvisible(sptr))
456 ++UserStats.inv_clients;
460 tmpstr = umode_str(sptr);
461 /* Send full IP address to IPv6-grokking servers. */
462 sendcmdto_flag_serv_butone(user->server, CMD_NICK, cptr,
463 FLAG_IPV6, FLAG_LAST_FLAG,
464 "%s %d %Tu %s %s %s%s%s%s %s%s :%s",
465 cli_name(sptr), cli_hopcount(sptr) + 1,
467 user->username, user->realhost,
468 *tmpstr ? "+" : "", tmpstr, *tmpstr ? " " : "",
469 iptobase64(ip_base64, &cli_ip(sptr), sizeof(ip_base64), 1),
470 NumNick(sptr), cli_info(sptr));
471 /* Send fake IPv6 addresses to pre-IPv6 servers. */
472 sendcmdto_flag_serv_butone(user->server, CMD_NICK, cptr,
473 FLAG_LAST_FLAG, FLAG_IPV6,
474 "%s %d %Tu %s %s %s%s%s%s %s%s :%s",
475 cli_name(sptr), cli_hopcount(sptr) + 1,
477 user->username, user->realhost,
478 *tmpstr ? "+" : "", tmpstr, *tmpstr ? " " : "",
479 iptobase64(ip_base64, &cli_ip(sptr), sizeof(ip_base64), 0),
480 NumNick(sptr), cli_info(sptr));
482 /* Send user mode to client */
485 static struct Flags flags; /* automatically initialized to zeros */
486 /* To avoid sending +r to the client due to auth-on-connect, set
487 * the "old" FLAG_ACCOUNT bit to match the client's value.
490 FlagSet(&flags, FLAG_ACCOUNT);
492 FlagClr(&flags, FLAG_ACCOUNT);
493 send_umode(cptr, sptr, &flags, ALL_UMODES);
494 if ((cli_snomask(sptr) != SNO_DEFAULT) && HasFlag(sptr, FLAG_SERVNOTICE))
495 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
500 /** List of user mode characters. */
501 static const struct UserMode {
502 unsigned int flag; /**< User mode constant. */
503 char c; /**< Character corresponding to the mode. */
507 { FLAG_INVISIBLE, 'i' },
508 { FLAG_WALLOP, 'w' },
509 { FLAG_SERVNOTICE, 's' },
511 { FLAG_CHSERV, 'k' },
513 { FLAG_ACCOUNT, 'r' },
514 { FLAG_HIDDENHOST, 'x' }
517 /** Length of #userModeList. */
518 #define USERMODELIST_SIZE sizeof(userModeList) / sizeof(struct UserMode)
521 * XXX - find a way to get rid of this
523 /** Nasty global buffer used for communications with umode_str() and others. */
524 static char umodeBuf[BUFSIZE];
526 /** Try to set a user's nickname.
527 * If \a sptr is a server, the client is being introduced for the first time.
528 * @param[in] cptr Client to set nickname.
529 * @param[in] sptr Client sending the NICK.
530 * @param[in] nick New nickname.
531 * @param[in] parc Number of arguments to NICK.
532 * @param[in] parv Argument list to NICK.
533 * @return CPTR_KILLED if \a cptr was killed, else 0.
535 int set_nick_name(struct Client* cptr, struct Client* sptr,
536 const char* nick, int parc, char* parv[])
538 if (IsServer(sptr)) {
540 const char* account = 0;
544 * A server introducing a new client, change source
546 struct Client* new_client = make_client(cptr, STAT_UNKNOWN);
547 assert(0 != new_client);
549 cli_hopcount(new_client) = atoi(parv[2]);
550 cli_lastnick(new_client) = atoi(parv[3]);
551 if (Protocol(cptr) > 9 && parc > 7 && *parv[6] == '+')
553 for (p = parv[6] + 1; *p; p++)
555 for (i = 0; i < USERMODELIST_SIZE; ++i)
557 if (userModeList[i].c == *p)
559 SetFlag(new_client, userModeList[i].flag);
560 if (userModeList[i].flag == FLAG_ACCOUNT)
567 client_set_privs(new_client, NULL); /* set privs on user */
571 strcpy(cli_name(new_client), nick);
572 cli_user(new_client) = make_user(new_client);
573 cli_user(new_client)->server = sptr;
574 SetRemoteNumNick(new_client, parv[parc - 2]);
576 * IP# of remote client
578 base64toip(parv[parc - 3], &cli_ip(new_client));
580 add_client_to_list(new_client);
581 hAddClient(new_client);
583 cli_serv(sptr)->ghost = 0; /* :server NICK means end of net.burst */
584 ircd_strncpy(cli_username(new_client), parv[4], USERLEN);
585 ircd_strncpy(cli_user(new_client)->username, parv[4], USERLEN);
586 ircd_strncpy(cli_user(new_client)->host, parv[5], HOSTLEN);
587 ircd_strncpy(cli_user(new_client)->realhost, parv[5], HOSTLEN);
588 ircd_strncpy(cli_info(new_client), parv[parc - 1], REALLEN);
590 int len = ACCOUNTLEN;
591 if ((p = strchr(account, ':'))) {
592 len = (p++) - account;
593 cli_user(new_client)->acc_create = atoi(p);
594 Debug((DEBUG_DEBUG, "Received timestamped account in user mode; "
595 "account \"%s\", timestamp %Tu", account,
596 cli_user(new_client)->acc_create));
598 ircd_strncpy(cli_user(new_client)->account, account, len);
600 if (HasHiddenHost(new_client))
601 ircd_snprintf(0, cli_user(new_client)->host, HOSTLEN, "%s.%s",
602 cli_user(new_client)->account,
603 feature_str(FEAT_HIDDEN_HOST));
605 return register_user(cptr, new_client);
607 else if ((cli_name(sptr))[0]) {
609 * Client changing its nick
611 * If the client belongs to me, then check to see
612 * if client is on any channels where it is currently
613 * banned. If so, do not allow the nick change to occur.
616 const char* channel_name;
617 struct Membership *member;
618 if ((channel_name = find_no_nickchange_channel(sptr))) {
619 return send_reply(cptr, ERR_BANNICKCHANGE, channel_name);
622 * Refuse nick change if the last nick change was less
623 * then 30 seconds ago. This is intended to get rid of
624 * clone bots doing NICK FLOOD. -SeKs
625 * If someone didn't change their nick for more then 60 seconds
626 * however, allow to do two nick changes immediately after another
627 * before limiting the nick flood. -Run
629 if (CurrentTime < cli_nextnick(cptr))
631 cli_nextnick(cptr) += 2;
632 send_reply(cptr, ERR_NICKTOOFAST, parv[1],
633 cli_nextnick(cptr) - CurrentTime);
634 /* Send error message */
635 sendcmdto_one(cptr, CMD_NICK, cptr, "%s", cli_name(cptr));
636 /* bounce NICK to user */
637 return 0; /* ignore nick change! */
640 /* Limit total to 1 change per NICK_DELAY seconds: */
641 cli_nextnick(cptr) += NICK_DELAY;
642 /* However allow _maximal_ 1 extra consecutive nick change: */
643 if (cli_nextnick(cptr) < CurrentTime)
644 cli_nextnick(cptr) = CurrentTime;
646 /* Invalidate all bans against the user so we check them again */
647 for (member = (cli_user(cptr))->channel; member;
648 member = member->next_channel)
649 ClearBanValid(member);
652 * Also set 'lastnick' to current time, if changed.
654 if (0 != ircd_strcmp(parv[0], nick))
655 cli_lastnick(sptr) = (sptr == cptr) ? TStime() : atoi(parv[2]);
658 * Client just changing his/her nick. If he/she is
659 * on a channel, send note of change to all clients
660 * on that channel. Propagate notice to other servers.
663 sendcmdto_common_channels_butone(sptr, CMD_NICK, NULL, ":%s", nick);
664 add_history(sptr, 1);
665 sendcmdto_serv_butone(sptr, CMD_NICK, cptr, "%s %Tu", nick,
669 sendcmdto_one(sptr, CMD_NICK, sptr, ":%s", nick);
671 if ((cli_name(sptr))[0])
673 strcpy(cli_name(sptr), nick);
677 /* Local client setting NICK the first time */
678 strcpy(cli_name(sptr), nick);
680 return auth_set_nick(cli_auth(sptr), nick);
685 /** Calculate the hash value for a target.
686 * @param[in] target Pointer to target, cast to unsigned int.
687 * @return Hash value constructed from the pointer.
689 static unsigned char hash_target(unsigned int target)
691 return (unsigned char) (target >> 16) ^ (target >> 8);
694 /** Records \a target as a recent target for \a sptr.
695 * @param[in] sptr User who has sent to a new target.
696 * @param[in] target Target to add.
699 add_target(struct Client *sptr, void *target)
701 /* Ok, this shouldn't work esp on alpha
703 unsigned char hash = hash_target((unsigned long) target);
704 unsigned char* targets;
707 assert(cli_local(sptr));
709 targets = cli_targets(sptr);
714 for (i = 0; i < MAXTARGETS; ++i) {
715 if (targets[i] == hash)
721 memmove(&targets[RESERVEDTARGETS + 1],
722 &targets[RESERVEDTARGETS], MAXTARGETS - RESERVEDTARGETS - 1);
723 targets[RESERVEDTARGETS] = hash;
726 /** Check whether \a sptr can send to or join \a target yet.
727 * @param[in] sptr User trying to join a channel or send a message.
728 * @param[in] target Target of the join or message.
729 * @param[in] name Name of the target.
730 * @param[in] created If non-zero, trying to join a new channel.
731 * @return Non-zero if too many target changes; zero if okay to send.
733 int check_target_limit(struct Client *sptr, void *target, const char *name,
736 unsigned char hash = hash_target((unsigned long) target);
738 unsigned char* targets;
741 assert(cli_local(sptr));
742 targets = cli_targets(sptr);
744 /* If user is invited to channel, give him/her a free target */
745 if (IsChannelName(name) && IsInvited(sptr, target))
749 * Same target as last time?
751 if (targets[0] == hash)
753 for (i = 1; i < MAXTARGETS; ++i) {
754 if (targets[i] == hash) {
755 memmove(&targets[1], &targets[0], i);
764 if (CurrentTime < cli_nexttarget(sptr)) {
765 if (cli_nexttarget(sptr) - CurrentTime < TARGET_DELAY + 8) {
769 cli_nexttarget(sptr) += 2;
770 send_reply(sptr, ERR_TARGETTOOFAST, name,
771 cli_nexttarget(sptr) - CurrentTime);
776 cli_nexttarget(sptr) += TARGET_DELAY;
777 if (cli_nexttarget(sptr) < CurrentTime - (TARGET_DELAY * (MAXTARGETS - 1)))
778 cli_nexttarget(sptr) = CurrentTime - (TARGET_DELAY * (MAXTARGETS - 1));
781 memmove(&targets[1], &targets[0], MAXTARGETS - 1);
786 /** Allows a channel operator to avoid target change checks when
787 * sending messages to users on their channel.
788 * @param[in] source User sending the message.
789 * @param[in] nick Destination of the message.
790 * @param[in] channel Name of channel being sent to.
791 * @param[in] text Message to send.
792 * @param[in] is_notice If non-zero, use CNOTICE instead of CPRIVMSG.
794 /* Added 971023 by Run. */
795 int whisper(struct Client* source, const char* nick, const char* channel,
796 const char* text, int is_notice)
799 struct Channel* chptr;
800 struct Membership* membership;
804 assert(0 != channel);
805 assert(MyUser(source));
807 if (!(dest = FindUser(nick))) {
808 return send_reply(source, ERR_NOSUCHNICK, nick);
810 if (!(chptr = FindChannel(channel))) {
811 return send_reply(source, ERR_NOSUCHCHANNEL, channel);
814 * compare both users channel lists, instead of the channels user list
815 * since the link is the same, this should be a little faster for channels
816 * with a lot of users
818 for (membership = cli_user(source)->channel; membership; membership = membership->next_channel) {
819 if (chptr == membership->channel)
822 if (0 == membership) {
823 return send_reply(source, ERR_NOTONCHANNEL, chptr->chname);
825 if (!IsVoicedOrOpped(membership)) {
826 return send_reply(source, ERR_VOICENEEDED, chptr->chname);
829 * lookup channel in destination
831 assert(0 != cli_user(dest));
832 for (membership = cli_user(dest)->channel; membership; membership = membership->next_channel) {
833 if (chptr == membership->channel)
836 if (0 == membership || IsZombie(membership)) {
837 return send_reply(source, ERR_USERNOTINCHANNEL, cli_name(dest), chptr->chname);
839 if (is_silenced(source, dest))
842 if (cli_user(dest)->away)
843 send_reply(source, RPL_AWAY, cli_name(dest), cli_user(dest)->away);
845 sendcmdto_one(source, CMD_NOTICE, dest, "%C :%s", dest, text);
847 sendcmdto_one(source, CMD_PRIVATE, dest, "%C :%s", dest, text);
852 /** Send a user mode change for \a cptr to neighboring servers.
853 * @param[in] cptr User whose mode is changing.
854 * @param[in] sptr Client who sent us the mode change message.
855 * @param[in] old Prior set of user flags.
856 * @param[in] prop If non-zero, also include FLAG_OPER.
858 void send_umode_out(struct Client *cptr, struct Client *sptr,
859 struct Flags *old, int prop)
862 struct Client *acptr;
864 send_umode(NULL, sptr, old, prop ? SEND_UMODES : SEND_UMODES_BUT_OPER);
866 for (i = HighestFd; i >= 0; i--)
868 if ((acptr = LocalClientArray[i]) && IsServer(acptr) &&
869 (acptr != cptr) && (acptr != sptr) && *umodeBuf)
870 sendcmdto_one(sptr, CMD_MODE, acptr, "%s :%s", cli_name(sptr), umodeBuf);
872 if (cptr && MyUser(cptr))
873 send_umode(cptr, sptr, old, ALL_UMODES);
877 /** Call \a fmt for each Client named in \a names.
878 * @param[in] sptr Client requesting information.
879 * @param[in] names Space-delimited list of nicknames.
880 * @param[in] rpl Base reply string for messages.
881 * @param[in] fmt Formatting callback function.
883 void send_user_info(struct Client* sptr, char* names, int rpl, InfoFormatter fmt)
889 struct Client* acptr;
896 mb = msgq_make(sptr, rpl_str(rpl), cli_name(&me), cli_name(sptr));
898 for (name = ircd_strtok(&p, names, " "); name; name = ircd_strtok(&p, 0, " ")) {
899 if ((acptr = FindUser(name))) {
901 msgq_append(0, mb, " ");
902 (*fmt)(acptr, sptr, mb);
904 if (5 == ++arg_count)
907 send_buffer(sptr, mb, 0);
911 /** Set \a flag on \a cptr and possibly hide the client's hostmask.
912 * @param[in,out] cptr User who is getting a new flag.
913 * @param[in] flag Some flag that affects host-hiding (FLAG_HIDDENHOST, FLAG_ACCOUNT).
917 hide_hostmask(struct Client *cptr, unsigned int flag)
919 struct Membership *chan;
922 case FLAG_HIDDENHOST:
923 /* Local users cannot set +x unless FEAT_HOST_HIDING is true. */
924 if (MyConnect(cptr) && !feature_bool(FEAT_HOST_HIDING))
928 /* Invalidate all bans against the user so we check them again */
929 for (chan = (cli_user(cptr))->channel; chan;
930 chan = chan->next_channel)
938 if (!HasFlag(cptr, FLAG_HIDDENHOST) || !HasFlag(cptr, FLAG_ACCOUNT))
941 sendcmdto_common_channels_butone(cptr, CMD_QUIT, cptr, ":Registered");
942 ircd_snprintf(0, cli_user(cptr)->host, HOSTLEN, "%s.%s",
943 cli_user(cptr)->account, feature_str(FEAT_HIDDEN_HOST));
945 /* ok, the client is now fully hidden, so let them know -- hikari */
947 send_reply(cptr, RPL_HOSTHIDDEN, cli_user(cptr)->host);
950 * Go through all channels the client was on, rejoin him
951 * and set the modes, if any
953 for (chan = cli_user(cptr)->channel; chan; chan = chan->next_channel)
957 /* Send a JOIN unless the user's join has been delayed. */
958 if (!IsDelayedJoin(chan))
959 sendcmdto_channel_butserv_butone(cptr, CMD_JOIN, chan->channel, cptr, 0,
960 "%H", chan->channel);
961 if (IsChanOp(chan) && HasVoice(chan))
962 sendcmdto_channel_butserv_butone(&his, CMD_MODE, chan->channel, cptr, 0,
963 "%H +ov %C %C", chan->channel, cptr,
965 else if (IsChanOp(chan) || HasVoice(chan))
966 sendcmdto_channel_butserv_butone(&his, CMD_MODE, chan->channel, cptr, 0,
967 "%H +%c %C", chan->channel, IsChanOp(chan) ? 'o' : 'v', cptr);
972 /** Set a user's mode. This function checks that \a cptr is trying to
973 * set his own mode, prevents local users from setting inappropriate
974 * modes through this function, and applies any other side effects of
975 * a successful mode change.
977 * @param[in,out] cptr User setting someone's mode.
978 * @param[in] sptr Client who sent the mode change message.
979 * @param[in] parc Number of parameters in \a parv.
980 * @param[in] parv Parameters to MODE.
983 int set_user_mode(struct Client *cptr, struct Client *sptr, int parc, char *parv[])
989 struct Flags setflags;
990 unsigned int tmpmask = 0;
991 int snomask_given = 0;
994 int do_host_hiding = 0;
1002 for (i = 0; i < USERMODELIST_SIZE; i++)
1004 if (HasFlag(sptr, userModeList[i].flag) &&
1005 userModeList[i].flag != FLAG_ACCOUNT)
1006 *m++ = userModeList[i].c;
1009 send_reply(sptr, RPL_UMODEIS, buf);
1010 if (HasFlag(sptr, FLAG_SERVNOTICE) && MyConnect(sptr)
1011 && cli_snomask(sptr) !=
1012 (unsigned int)(IsOper(sptr) ? SNO_OPERDEFAULT : SNO_DEFAULT))
1013 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
1018 * find flags already set for user
1019 * why not just copy them?
1021 setflags = cli_flags(sptr);
1023 if (MyConnect(sptr))
1024 tmpmask = cli_snomask(sptr);
1027 * parse mode change string(s)
1029 for (p = &parv[2]; *p; p++) { /* p is changed in loop too */
1030 for (m = *p; *m; m++) {
1039 if (*(p + 1) && is_snomask(*(p + 1))) {
1041 tmpmask = umode_make_snomask(tmpmask, *++p, what);
1042 tmpmask &= (IsAnOper(sptr) ? SNO_ALL : SNO_USER);
1045 tmpmask = (what == MODE_ADD) ?
1046 (IsAnOper(sptr) ? SNO_OPERDEFAULT : SNO_DEFAULT) : 0;
1048 SetServNotice(sptr);
1050 ClearServNotice(sptr);
1053 if (what == MODE_ADD)
1059 if (what == MODE_ADD)
1062 ClrFlag(sptr, FLAG_OPER);
1063 ClrFlag(sptr, FLAG_LOCOP);
1064 if (MyConnect(sptr))
1066 tmpmask = cli_snomask(sptr) & ~SNO_OPER;
1067 cli_handler(sptr) = CLIENT_HANDLER;
1072 if (what == MODE_ADD)
1076 ClrFlag(sptr, FLAG_OPER);
1077 ClrFlag(sptr, FLAG_LOCOP);
1078 if (MyConnect(sptr))
1080 tmpmask = cli_snomask(sptr) & ~SNO_OPER;
1081 cli_handler(sptr) = CLIENT_HANDLER;
1086 if (what == MODE_ADD)
1089 ClearInvisible(sptr);
1092 if (what == MODE_ADD)
1098 if (what == MODE_ADD)
1099 SetChannelService(sptr);
1101 ClearChannelService(sptr);
1104 if (what == MODE_ADD)
1110 if (what == MODE_ADD)
1114 send_reply(sptr, ERR_UMODEUNKNOWNFLAG, *m);
1120 * Evaluate rules for new user mode
1121 * Stop users making themselves operators too easily:
1123 if (!IsServer(cptr))
1125 if (!FlagHas(&setflags, FLAG_OPER) && IsOper(sptr))
1127 if (!FlagHas(&setflags, FLAG_LOCOP) && IsLocOp(sptr))
1130 * new umode; servers can set it, local users cannot;
1131 * prevents users from /kick'ing or /mode -o'ing
1133 if (!FlagHas(&setflags, FLAG_CHSERV))
1134 ClearChannelService(sptr);
1136 * only send wallops to opers
1138 if (feature_bool(FEAT_WALLOPS_OPER_ONLY) && !IsAnOper(sptr) &&
1139 !FlagHas(&setflags, FLAG_WALLOP))
1141 if (feature_bool(FEAT_HIS_SNOTICES_OPER_ONLY) && MyConnect(sptr) &&
1142 !IsAnOper(sptr) && !FlagHas(&setflags, FLAG_SERVNOTICE))
1144 ClearServNotice(sptr);
1145 set_snomask(sptr, 0, SNO_SET);
1147 if (feature_bool(FEAT_HIS_DEBUG_OPER_ONLY) &&
1148 !IsAnOper(sptr) && !FlagHas(&setflags, FLAG_DEBUG))
1151 if (MyConnect(sptr))
1153 if ((FlagHas(&setflags, FLAG_OPER) || FlagHas(&setflags, FLAG_LOCOP)) &&
1155 det_confs_butmask(sptr, CONF_CLIENT & ~CONF_OPERATOR);
1157 if (SendServNotice(sptr))
1159 if (tmpmask != cli_snomask(sptr))
1160 set_snomask(sptr, tmpmask, SNO_SET);
1161 if (cli_snomask(sptr) && snomask_given)
1162 send_reply(sptr, RPL_SNOMASK, cli_snomask(sptr), cli_snomask(sptr));
1165 set_snomask(sptr, 0, SNO_SET);
1168 * Compare new flags with old flags and send string which
1169 * will cause servers to update correctly.
1171 if (!FlagHas(&setflags, FLAG_OPER) && IsOper(sptr))
1175 client_set_privs(sptr, NULL); /* may set propagate privilege */
1177 /* remember propagate privilege setting */
1178 if (HasPriv(sptr, PRIV_PROPAGATE))
1180 if (FlagHas(&setflags, FLAG_OPER) && !IsOper(sptr))
1182 /* user no longer oper */
1184 client_set_privs(sptr, NULL); /* will clear propagate privilege */
1186 if (FlagHas(&setflags, FLAG_INVISIBLE) && !IsInvisible(sptr))
1187 --UserStats.inv_clients;
1188 if (!FlagHas(&setflags, FLAG_INVISIBLE) && IsInvisible(sptr))
1189 ++UserStats.inv_clients;
1190 if (!FlagHas(&setflags, FLAG_HIDDENHOST) && do_host_hiding)
1191 hide_hostmask(sptr, FLAG_HIDDENHOST);
1192 if (IsRegistered(sptr))
1193 send_umode_out(cptr, sptr, &setflags, prop);
1198 /** Build a mode string to describe modes for \a cptr.
1199 * @param[in] cptr Some user.
1200 * @return Pointer to a static buffer.
1202 char *umode_str(struct Client *cptr)
1204 /* Maximum string size: "owidgrx\0" */
1207 struct Flags c_flags = cli_flags(cptr);
1209 if (!HasPriv(cptr, PRIV_PROPAGATE))
1210 FlagClr(&c_flags, FLAG_OPER);
1212 for (i = 0; i < USERMODELIST_SIZE; ++i)
1214 if (FlagHas(&c_flags, userModeList[i].flag) &&
1215 userModeList[i].flag >= FLAG_GLOBAL_UMODES)
1216 *m++ = userModeList[i].c;
1219 if (IsAccount(cptr))
1221 char* t = cli_user(cptr)->account;
1224 while ((*m++ = *t++))
1227 if (cli_user(cptr)->acc_create) {
1229 Debug((DEBUG_DEBUG, "Sending timestamped account in user mode for "
1230 "account \"%s\"; timestamp %Tu", cli_user(cptr)->account,
1231 cli_user(cptr)->acc_create));
1232 ircd_snprintf(0, t = nbuf, sizeof(nbuf), ":%Tu",
1233 cli_user(cptr)->acc_create);
1234 m--; /* back up over previous nul-termination */
1235 while ((*m++ = *t++))
1242 return umodeBuf; /* Note: static buffer, gets
1243 overwritten by send_umode() */
1246 /** Send a mode change string for \a sptr to \a cptr.
1247 * @param[in] cptr Destination of mode change message.
1248 * @param[in] sptr User whose mode has changed.
1249 * @param[in] old Pre-change set of modes for \a sptr.
1250 * @param[in] sendset One of ALL_UMODES, SEND_UMODES_BUT_OPER,
1251 * SEND_UMODES, to select which changed user modes to send.
1253 void send_umode(struct Client *cptr, struct Client *sptr, struct Flags *old,
1259 int what = MODE_NULL;
1262 * Build a string in umodeBuf to represent the change in the user's
1263 * mode between the new (cli_flags(sptr)) and 'old', but skipping
1264 * the modes indicated by sendset.
1268 for (i = 0; i < USERMODELIST_SIZE; ++i)
1270 flag = userModeList[i].flag;
1271 if (FlagHas(old, flag)
1272 == HasFlag(sptr, flag))
1278 case SEND_UMODES_BUT_OPER:
1279 if (flag == FLAG_OPER)
1281 /* and fall through */
1283 if (flag < FLAG_GLOBAL_UMODES)
1287 if (FlagHas(old, flag))
1289 if (what == MODE_DEL)
1290 *m++ = userModeList[i].c;
1295 *m++ = userModeList[i].c;
1298 else /* !FlagHas(old, flag) */
1300 if (what == MODE_ADD)
1301 *m++ = userModeList[i].c;
1306 *m++ = userModeList[i].c;
1311 if (*umodeBuf && cptr)
1312 sendcmdto_one(sptr, CMD_MODE, cptr, "%s :%s", cli_name(sptr), umodeBuf);
1316 * Check to see if this resembles a sno_mask. It is if 1) there is
1317 * at least one digit and 2) The first digit occurs before the first
1318 * alphabetic character.
1319 * @param[in] word Word to check for sno_mask-ness.
1320 * @return Non-zero if \a word looks like a server notice mask; zero if not.
1322 int is_snomask(char *word)
1326 for (; *word; word++)
1329 else if (IsAlpha(*word))
1335 /** Update snomask \a oldmask according to \a arg and \a what.
1336 * @param[in] oldmask Original user mask.
1337 * @param[in] arg Update string (either a number or '+'/'-' followed by a number).
1338 * @param[in] what MODE_ADD if adding the mask.
1339 * @return New value of service notice mask.
1341 unsigned int umode_make_snomask(unsigned int oldmask, char *arg, int what)
1343 unsigned int sno_what;
1344 unsigned int newmask;
1348 if (what == MODE_ADD)
1353 else if (*arg == '-')
1356 if (what == MODE_ADD)
1362 sno_what = (what == MODE_ADD) ? SNO_SET : SNO_DEL;
1363 /* pity we don't have strtoul everywhere */
1364 newmask = (unsigned int)atoi(arg);
1365 if (sno_what == SNO_DEL)
1366 newmask = oldmask & ~newmask;
1367 else if (sno_what == SNO_ADD)
1372 /** Remove \a cptr from the singly linked list \a list.
1373 * @param[in] cptr Client to remove from list.
1374 * @param[in,out] list Pointer to head of list containing \a cptr.
1376 static void delfrom_list(struct Client *cptr, struct SLink **list)
1379 struct SLink* prv = NULL;
1381 for (tmp = *list; tmp; tmp = tmp->next) {
1382 if (tmp->value.cptr == cptr) {
1384 prv->next = tmp->next;
1394 /** Set \a cptr's server notice mask, according to \a what.
1395 * @param[in,out] cptr Client whose snomask is updating.
1396 * @param[in] newmask Base value for new snomask.
1397 * @param[in] what One of SNO_ADD, SNO_DEL, SNO_SET, to choose operation.
1399 void set_snomask(struct Client *cptr, unsigned int newmask, int what)
1401 unsigned int oldmask, diffmask; /* unsigned please */
1405 oldmask = cli_snomask(cptr);
1407 if (what == SNO_ADD)
1409 else if (what == SNO_DEL)
1410 newmask = oldmask & ~newmask;
1411 else if (what != SNO_SET) /* absolute set, no math needed */
1412 sendto_opmask_butone(0, SNO_OLDSNO, "setsnomask called with %d ?!", what);
1414 newmask &= (IsAnOper(cptr) ? SNO_ALL : SNO_USER);
1416 diffmask = oldmask ^ newmask;
1418 for (i = 0; diffmask >> i; i++) {
1419 if (((diffmask >> i) & 1))
1421 if (((newmask >> i) & 1))
1424 tmp->next = opsarray[i];
1425 tmp->value.cptr = cptr;
1429 /* not real portable :( */
1430 delfrom_list(cptr, &opsarray[i]);
1433 cli_snomask(cptr) = newmask;
1436 /** Check whether \a sptr is allowed to send a message to \a acptr.
1437 * If \a sptr is a remote user, it means some server has an outdated
1438 * SILENCE list for \a acptr, so send the missing SILENCE mask(s) back
1439 * in the direction of \a sptr. Skip the check if \a sptr is a server.
1440 * @param[in] sptr Client trying to send a message.
1441 * @param[in] acptr Destination of message.
1442 * @return Non-zero if \a sptr is SILENCEd by \a acptr, zero if not.
1444 int is_silenced(struct Client *sptr, struct Client *acptr)
1448 size_t buf_used, slen;
1451 if (IsServer(sptr) || !(user = cli_user(acptr))
1452 || !(found = find_ban(sptr, user->silence)))
1454 assert(!(found->flags & BAN_EXCEPTION));
1455 if (!MyConnect(sptr)) {
1456 /* Buffer positive silence to send back. */
1457 buf_used = strlen(found->banstr);
1458 memcpy(buf, found->banstr, buf_used);
1459 /* Add exceptions to buffer. */
1460 for (found = user->silence; found; found = found->next) {
1461 if (!(found->flags & BAN_EXCEPTION))
1463 slen = strlen(found->banstr);
1464 if (buf_used + slen + 4 > 400) {
1465 buf[buf_used] = '\0';
1466 sendcmdto_one(acptr, CMD_SILENCE, cli_from(sptr), "%C %s", sptr, buf);
1470 buf[buf_used++] = ',';
1471 buf[buf_used++] = '+';
1472 buf[buf_used++] = '~';
1473 memcpy(buf + buf_used, found->banstr, slen);
1476 /* Flush silence buffer. */
1478 buf[buf_used] = '\0';
1479 sendcmdto_one(acptr, CMD_SILENCE, cli_from(sptr), "%C %s", sptr, buf);
1486 /** Send RPL_ISUPPORT lines to \a cptr.
1487 * @param[in] cptr Client to send ISUPPORT to.
1491 send_supported(struct Client *cptr)
1493 char featurebuf[512];
1495 ircd_snprintf(0, featurebuf, sizeof(featurebuf), FEATURES1, FEATURESVALUES1);
1496 send_reply(cptr, RPL_ISUPPORT, featurebuf);
1497 ircd_snprintf(0, featurebuf, sizeof(featurebuf), FEATURES2, FEATURESVALUES2);
1498 send_reply(cptr, RPL_ISUPPORT, featurebuf);
1500 return 0; /* convenience return, if it's ever needed */