2 * IRC - Internet Relay Chat, ircd/channel.c
3 * Copyright (C) 1990 Jarkko Oikarinen and
4 * University of Oulu, Co Center
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 1, or (at your option)
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 * @brief Channel management and maintenance
22 * @version $Id: channel.c 1906 2009-02-09 03:39:42Z entrope $
29 #include "destruct_event.h"
32 #include "ircd_alloc.h"
33 #include "ircd_chattr.h"
34 #include "ircd_defs.h"
35 #include "ircd_features.h"
37 #include "ircd_reply.h"
38 #include "ircd_snprintf.h"
39 #include "ircd_string.h"
46 #include "querycmds.h"
57 /* #include <assert.h> -- Now using assert in ircd_log.h */
62 /** Linked list containing the full list of all channels */
63 struct Channel* GlobalChannelList = 0;
65 /** Number of struct Membership*'s allocated */
66 static unsigned int membershipAllocCount;
67 /** Freelist for struct Membership*'s */
68 static struct Membership* membershipFreeList;
69 /** Freelist for struct Ban*'s */
70 static struct Ban* free_bans;
71 /** Freelist for struct MemberFlood*'s */
72 static struct MemberFlood* free_MemberFlood;
73 /** Number of ban structures allocated. */
74 static size_t bans_alloc;
75 /** Number of ban structures in use. */
76 static size_t bans_inuse;
79 /** return the length (>=0) of a chain of links.
80 * @param lp pointer to the start of the linked list
81 * @return the number of items in the list
83 static int list_length(struct SLink *lp)
87 for (; lp; lp = lp->next)
93 /** Set the mask for a ban, checking for IP masks.
94 * @param[in,out] ban Ban structure to modify.
95 * @param[in] banstr Mask to ban.
98 set_ban_mask(struct Ban *ban, const char *banstr)
101 assert(banstr != NULL);
102 ircd_strncpy(ban->banstr, banstr, sizeof(ban->banstr) - 1);
103 sep = strrchr(banstr, '@');
105 ban->nu_len = sep - banstr;
106 if (ipmask_parse(sep + 1, &ban->address, &ban->addrbits))
107 ban->flags |= BAN_IPMASK;
111 /** Allocate a new Ban structure.
112 * @param[in] banstr Ban mask to use.
113 * @return Newly allocated ban.
116 make_ban(const char *banstr)
121 free_bans = free_bans->next;
123 else if (!(ban = MyMalloc(sizeof(*ban))))
128 memset(ban, 0, sizeof(*ban));
129 set_ban_mask(ban, banstr);
133 /** Deallocate a ban structure.
134 * @param[in] ban Ban to deallocate.
137 free_ban(struct Ban *ban)
139 ban->next = free_bans;
144 /** Report ban usage to \a cptr.
145 * @param[in] cptr Client requesting information.
147 void bans_send_meminfo(struct Client *cptr)
151 for (num_free = 0, ban = free_bans; ban; ban = ban->next)
153 send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":Bans: inuse %zu(%zu) free %zu alloc %zu",
154 bans_inuse, bans_inuse * sizeof(*ban), num_free, bans_alloc);
157 /** return the struct Membership* that represents a client on a channel
158 * This function finds a struct Membership* which holds the state about
159 * a client on a specific channel. The code is smart enough to iterate
160 * over the channels a user is in, or the users in a channel to find the
161 * user depending on which is likely to be more efficient.
163 * @param chptr pointer to the channel struct
164 * @param cptr pointer to the client struct
166 * @returns pointer to the struct Membership representing this client on
167 * this channel. Returns NULL if the client is not on the channel.
168 * Returns NULL if the client is actually a server.
169 * @see find_channel_member()
171 struct Membership* find_member_link(struct Channel* chptr, const struct Client* cptr)
173 struct Membership *m;
177 /* Servers don't have member links */
178 if (IsServer(cptr)||IsMe(cptr))
181 /* +k users are typically on a LOT of channels. So we iterate over who
182 * is in the channel. X/W are +k and are in about 5800 channels each.
183 * however there are typically no more than 1000 people in a channel
186 if (IsChannelService(cptr)) {
189 assert(m->channel == chptr);
195 /* Users on the other hand aren't allowed on more than 15 channels. 50%
196 * of users that are on channels are on 2 or less, 95% are on 7 or less,
197 * and 99% are on 10 or less.
200 m = (cli_user(cptr))->channel;
202 assert(m->user == cptr);
203 if (m->channel == chptr)
211 /** Find the client structure for a nick name (user)
212 * Find the client structure for a nick name (user)
213 * using history mechanism if necessary. If the client is not found, an error
214 * message (NO SUCH NICK) is generated. If the client was found
215 * through the history, chasing will be 1 and otherwise 0.
217 * This function was used extensively in the P09 days, and since we now have
218 * numeric nicks is no longer quite as important.
220 * @param sptr Pointer to the client that has requested the search
221 * @param user a string representing the client to be found
222 * @param chasing a variable set to 0 if the user was found directly,
224 * @returns a pointer the client, or NULL if the client wasn't found.
226 struct Client* find_chasing(struct Client* sptr, const char* user, int* chasing)
228 struct Client* who = FindClient(user);
235 if (!(who = get_history(user, feature_int(FEAT_KILLCHASETIMELIMIT)))) {
236 send_reply(sptr, ERR_NOSUCHNICK, user);
244 /** Decrement the count of users, and free if empty.
245 * Subtract one user from channel i (and free channel * block, if channel
248 * @param chptr The channel to subtract one from.
250 * @returns true (1) if channel still has members.
251 * false (0) if the channel is now empty.
253 int sub1_from_channel(struct Channel* chptr)
255 if (chptr->users > 1) /* Can be 0, called for an empty channel too */
257 assert(0 != chptr->members);
264 if(chptr->mode.mode & MODE_PERSIST)
268 * Also channels without Apass set need to be kept alive,
269 * otherwise Bad Guys(tm) would be able to takeover
270 * existing channels too easily, and then set an Apass!
271 * However, if a channel without Apass becomes empty
272 * then we try to be kind to them and remove possible
275 chptr->mode.mode &= ~MODE_INVITEONLY;
276 chptr->mode.limit = 0;
278 * We do NOT reset a possible key or bans because when
279 * the 'channel owners' can't get in because of a key
280 * or ban then apparently there was a fight/takeover
281 * on the channel and we want them to contact IRC opers
282 * who then will educate them on the use of Apass/Upass.
284 if (!chptr->mode.apass[0]) /* If no Apass, reset all modes. */
286 struct Ban *link, *next;
287 chptr->mode.mode = 0;
288 *chptr->mode.key = '\0';
289 while (chptr->invites)
290 del_invite(chptr->invites->value.cptr, chptr);
291 for (link = chptr->banlist; link; link = next) {
295 chptr->banlist = NULL;
297 /* Immediately destruct empty -A channels if not using apass. */
298 if (!feature_bool(FEAT_OPLEVELS))
300 destruct_channel(chptr);
304 if (TStime() - chptr->creationtime < 172800) /* Channel younger than 48 hours? */
305 schedule_destruct_event_1m(chptr); /* Get rid of it in approximately 4-5 minutes */
307 schedule_destruct_event_48h(chptr); /* Get rid of it in approximately 48 hours */
312 /** Destroy an empty channel
313 * This function destroys an empty channel, removing it from hashtables,
314 * and removing any resources it may have consumed.
316 * @param chptr The channel to destroy
318 * @returns 0 (success)
320 * FIXME: Change to return void, this function never fails.
322 int destruct_channel(struct Channel* chptr)
324 struct Ban *ban, *next;
326 assert(0 == chptr->members);
329 * Now, find all invite links from channel structure
331 while (chptr->invites)
332 del_invite(chptr->invites->value.cptr, chptr);
334 for (ban = chptr->banlist; ban; ban = next)
340 chptr->prev->next = chptr->next;
342 GlobalChannelList = chptr->next;
344 chptr->next->prev = chptr->prev;
346 --UserStats.channels;
348 * make sure that channel actually got removed from hash table
350 assert(chptr->hnext == chptr);
355 /** returns Membership * if a person is joined and not a zombie
357 * @param chptr Channel
358 * @returns pointer to the client's struct Membership * on the channel if that
359 * user is a full member of the channel, or NULL otherwise.
361 * @see find_member_link()
363 struct Membership* find_channel_member(struct Client* cptr, struct Channel* chptr)
365 struct Membership* member;
368 member = find_member_link(chptr, cptr);
369 return (member && !IsZombie(member)) ? member : 0;
372 /** Searches for a ban from a ban list that matches a user.
373 * @param[in] cptr The client to test.
374 * @param[in] banlist The list of bans to test.
375 * @return Pointer to a matching ban, or NULL if none exit.
377 static struct Ban *find_ban_with_nick(struct Client *cptr, const char *nick, struct Ban *banlist)
379 char nu[NICKLEN + USERLEN + 2];
380 char tmphost[HOSTLEN + 1];
381 char iphost[SOCKIPLEN + 1];
384 char *account_host = NULL;
387 /* Build nick!user and alternate host names. */
388 ircd_snprintf(0, nu, sizeof(nu), "%s!%s",
389 (nick ? nick : cli_name(cptr)), cli_user(cptr)->username);
390 ircd_ntoa_r(iphost, &cli_ip(cptr));
392 /* Check for all three possible hosts:
396 * But only if they are set.
398 if(IsAccount(cptr)) {
399 ircd_snprintf(0, tmphost, HOSTLEN, "%s.%s", cli_user(cptr)->account, feature_str(FEAT_HIDDEN_HOST));
400 account_host = tmphost;
402 if(IsFakeHost(cptr)) {
403 if(HasHiddenHost(cptr)) {
404 sr = cli_user(cptr)->realhost;
406 else sr = cli_user(cptr)->fakehost;
408 else if(HasHiddenHost(cptr)) {
410 sr = cli_user(cptr)->realhost;
413 /* Walk through ban list. */
414 for (found = NULL; banlist; banlist = banlist->next) {
416 /* If we have found a positive ban already, only consider exceptions. */
417 if (found && !(banlist->flags & BAN_EXCEPTION))
419 /* Compare nick!user portion of ban. */
420 banlist->banstr[banlist->nu_len] = '\0';
421 res = match(banlist->banstr, nu);
422 banlist->banstr[banlist->nu_len] = '@';
425 /* Compare host portion of ban. */
426 hostmask = banlist->banstr + banlist->nu_len + 1;
427 if (!((banlist->flags & BAN_IPMASK)
428 && ipmask_check(&cli_ip(cptr), &banlist->address, banlist->addrbits))
429 && match(hostmask, cli_user(cptr)->host)
430 && !(account_host && !match(hostmask, account_host))
431 && !(sr && !match(hostmask, sr)))
433 /* If an exception matches, no ban can match. */
434 if (banlist->flags & BAN_EXCEPTION)
436 /* Otherwise, remember this ban but keep searching for an exception. */
442 struct Ban *find_ban(struct Client *cptr, struct Ban *banlist) {
443 return find_ban_with_nick(cptr, NULL, banlist);
447 * This function returns true if the user is banned on the said channel.
448 * This function will check the ban cache if applicable, otherwise will
449 * do the comparisons and cache the result.
451 * @param[in] member The Membership to test for banned-ness.
452 * @return Non-zero if the member is banned, zero if not.
454 static int is_banned(struct Membership* member)
456 if (IsBanValid(member))
457 return IsBanned(member);
460 if (find_ban(member->user, member->channel->banlist)) {
469 static int is_banned_with_nick(struct Membership* member, const char *nick) {
470 if (find_ban_with_nick(member->user, nick, member->channel->banlist))
476 /** add a user to a channel.
477 * adds a user to a channel by adding another link to the channels member
480 * @param chptr The channel to add to.
481 * @param who The user to add.
482 * @param flags The flags the user gets initially.
483 * @param oplevel The oplevel the user starts with.
485 void add_user_to_channel(struct Channel* chptr, struct Client* who,
486 unsigned int flags, int oplevel)
493 struct Membership* member = membershipFreeList;
495 membershipFreeList = member->next_member;
497 member = (struct Membership*) MyMalloc(sizeof(struct Membership));
498 ++membershipAllocCount;
503 member->channel = chptr;
504 member->status = flags;
505 member->flood = NULL;
506 SetOpLevel(member, oplevel);
508 member->next_member = chptr->members;
509 if (member->next_member)
510 member->next_member->prev_member = member;
511 member->prev_member = 0;
512 chptr->members = member;
514 member->next_channel = (cli_user(who))->channel;
515 if (member->next_channel)
516 member->next_channel->prev_channel = member;
517 member->prev_channel = 0;
518 (cli_user(who))->channel = member;
520 if (chptr->destruct_event)
521 remove_destruct_event(chptr);
523 ++((cli_user(who))->joined);
527 /** Remove a person from a channel, given their Membership*
529 * @param member A member of a channel.
531 * @returns true if there are more people in the channel.
533 static int remove_member_from_channel(struct Membership* member)
535 struct Channel* chptr;
537 chptr = member->channel;
539 * unlink channel member list
541 if (member->next_member)
542 member->next_member->prev_member = member->prev_member;
543 if (member->prev_member)
544 member->prev_member->next_member = member->next_member;
546 member->channel->members = member->next_member;
549 * If this is the last delayed-join user, may have to clear WASDELJOINS.
551 if (IsDelayedJoin(member))
552 CheckDelayedJoins(chptr);
555 * unlink client channel list
557 if (member->next_channel)
558 member->next_channel->prev_channel = member->prev_channel;
559 if (member->prev_channel)
560 member->prev_channel->next_channel = member->next_channel;
562 (cli_user(member->user))->channel = member->next_channel;
564 --(cli_user(member->user))->joined;
566 member->flood = NULL;
568 member->next_member = membershipFreeList;
569 membershipFreeList = member;
571 return sub1_from_channel(chptr);
574 /** Check if all the remaining members on the channel are zombies
576 * @returns False if the channel has any non zombie members, True otherwise.
579 static int channel_all_zombies(struct Channel* chptr)
581 struct Membership* member;
583 /* Though, there are no real users we pretend this channel to have members
584 * to protect it from being destroyed.
586 if(chptr->mode.mode & MODE_PERSIST)
589 for (member = chptr->members; member; member = member->next_member) {
590 if (!IsZombie(member))
597 /** Remove a user from a channel
598 * This is the generic entry point for removing a user from a channel, this
599 * function will remove the client from the channel, and destroy the channel
600 * if there are no more normal users left.
602 * @param cptr The client
603 * @param chptr The channel
605 void remove_user_from_channel(struct Client* cptr, struct Channel* chptr)
608 struct Membership* member;
611 if ((member = find_member_link(chptr, cptr))) {
612 if (remove_member_from_channel(member)) {
613 if (channel_all_zombies(chptr)) {
615 * XXX - this looks dangerous but isn't if we got the referential
616 * integrity right for channels
618 while (remove_member_from_channel(chptr->members))
625 /** Remove a user from all channels they are on.
627 * This function removes a user from all channels they are on.
629 * @param cptr The client to remove.
631 void remove_user_from_all_channels(struct Client* cptr)
633 struct Membership* chan;
635 assert(0 != cli_user(cptr));
637 while ((chan = (cli_user(cptr))->channel))
638 remove_user_from_channel(cptr, chan->channel);
641 /** Check if this user is a legitimate chanop
643 * @param cptr Client to check
644 * @param chptr Channel to check
646 * @returns True if the user is a chanop (And not a zombie), False otherwise.
649 int is_chan_op(struct Client *cptr, struct Channel *chptr)
651 struct Membership* member;
653 if ((member = find_member_link(chptr, cptr)))
654 return (!IsZombie(member) && IsChanOp(member));
659 /** Check if a user is a Zombie on a specific channel.
661 * @param cptr The client to check.
662 * @param chptr The channel to check.
664 * @returns True if the client (cptr) is a zombie on the channel (chptr),
669 int is_zombie(struct Client *cptr, struct Channel *chptr)
671 struct Membership* member;
675 if ((member = find_member_link(chptr, cptr)))
676 return IsZombie(member);
680 /** Returns if a user has voice on a channel.
682 * @param cptr The client
683 * @param chptr The channel
685 * @returns True if the client (cptr) is voiced on (chptr) and is not a zombie.
688 int has_voice(struct Client* cptr, struct Channel* chptr)
690 struct Membership* member;
693 if ((member = find_member_link(chptr, cptr)))
694 return (!IsZombie(member) && HasVoice(member));
699 /** Can this member send to a channel
701 * A user can speak on a channel iff:
703 * <li> They didn't use the Apass to gain ops.
704 * <li> They are op'd or voice'd.
705 * <li> You aren't banned.
706 * <li> The channel isn't +m
707 * <li> The channel isn't +n or you are on the channel.
710 * This function will optionally reveal a user on a delayed join channel if
711 * they are allowed to send to the channel.
713 * @param member The membership of the user
714 * @param reveal If true, the user will be "revealed" on a delayed
717 * @returns True if the client can speak on the channel.
719 int member_can_send_to_channel(struct Membership* member, int reveal)
723 /* Do not check for users on other servers: This should be a
724 * temporary desynch, or maybe they are on an older server, but
725 * we do not want to send ERR_CANNOTSENDTOCHAN more than once.
726 * Also allow XtraOps to be always able to speak.
728 if (!MyUser(member->user) || IsXtraOp(member->user))
730 if (IsDelayedJoin(member) && !IsInvisibleJoin(member) && reveal)
731 RevealDelayedJoin(member);
735 /* Discourage using the Apass to get op. They should use the Upass. */
736 if (IsChannelManager(member) && member->channel->mode.apass[0])
739 /* If you have voice or ops, you can speak. */
740 if (IsVoicedOrOpped(member))
744 * If it's moderated, and you aren't a privileged user, you can't
747 if (member->channel->mode.mode & MODE_MODERATED)
750 /* If only logged in users may join and you're not one, you can't speak. */
751 if (member->channel->mode.mode & MODE_REGONLY && !IsAccount(member->user))
754 /* If you're banned then you can't speak either. */
755 if (is_banned(member))
758 if (IsDelayedJoin(member) && reveal && !IsInvisibleJoin(member))
759 RevealDelayedJoin(member);
764 /** Check if a client can send to a channel.
766 * Has the added check over member_can_send_to_channel() of servers can
769 * @param cptr The client to check
770 * @param chptr The channel to check
771 * @param reveal If the user should be revealed (see
772 * member_can_send_to_channel())
774 * @returns true if the client is allowed to speak on the channel, false
777 * @see member_can_send_to_channel()
779 int client_can_send_to_channel(struct Client *cptr, struct Channel *chptr, int reveal)
781 struct Membership *member;
784 * Servers and extra ops can always speak on channels.
786 if (IsServer(cptr) || IsXtraOp(cptr))
789 member = find_channel_member(cptr, chptr);
792 * You can't speak if you're off channel, and it is +n (no external messages)
796 if ((chptr->mode.mode & (MODE_NOPRIVMSGS|MODE_MODERATED)) ||
797 ((chptr->mode.mode & MODE_REGONLY) && !IsAccount(cptr)))
800 return !find_ban(cptr, chptr->banlist);
802 return member_can_send_to_channel(member, reveal);
805 /** Returns the name of a channel that prevents the user from changing nick.
806 * if a member and not (opped or voiced) and (banned or moderated), return
807 * the name of the first channel banned on.
809 * @param cptr The client
810 * @param new_nick The new nick of the client
812 * @returns the name of the first channel banned on, or NULL if the user
815 const char* find_no_nickchange_channel(struct Client* cptr, const char *new_nick)
818 struct Membership* member;
819 for (member = (cli_user(cptr))->channel; member;
820 member = member->next_channel) {
821 if (IsVoicedOrOpped(member))
823 if ((member->channel->mode.mode & MODE_MODERATED)
824 || (member->channel->mode.mode & MODE_REGONLY && !IsAccount(cptr))
825 || is_banned(member) || (new_nick && is_banned_with_nick(member, new_nick)))
826 return member->channel->chname;
833 /** Fill mbuf/pbuf with modes from chptr
834 * write the "simple" list of channel modes for channel chptr onto buffer mbuf
835 * with the parameters in pbuf as visible by cptr.
837 * This function will hide keys from non-op'd, non-server clients.
839 * @param cptr The client to generate the mode for.
840 * @param mbuf The buffer to write the modes into.
841 * @param pbuf The buffer to write the mode parameters into.
842 * @param buflen The length of the buffers.
843 * @param chptr The channel to get the modes from.
844 * @param member The membership of this client on this channel (or NULL
845 * if this client isn't on this channel)
848 void channel_modes(struct Client *cptr, char *mbuf, char *pbuf, int buflen,
849 struct Channel *chptr, struct Membership *member)
851 int previous_parameter = 0;
858 if (chptr->mode.mode & MODE_SECRET)
860 else if (chptr->mode.mode & MODE_PRIVATE)
862 if (chptr->mode.mode & MODE_MODERATED)
864 if (chptr->mode.mode & MODE_TOPICLIMIT)
866 if (chptr->mode.mode & MODE_INVITEONLY)
868 if (chptr->mode.mode & MODE_NOPRIVMSGS)
870 if (chptr->mode.mode & MODE_REGONLY)
872 if (chptr->mode.mode & MODE_DELJOINS)
874 else if (MyUser(cptr) && (chptr->mode.mode & MODE_WASDELJOINS))
876 if (chptr->mode.mode & MODE_NOCOLOUR)
878 if (chptr->mode.mode & MODE_NOCTCP)
880 if (chptr->mode.mode & MODE_PERSIST)
882 if (chptr->mode.mode & MODE_REGISTERED)
884 if (chptr->mode.mode & MODE_NONOTICE)
886 if (chptr->mode.mode & MODE_NOAMSGS)
888 if (chptr->mode.mode & MODE_QUARANTINE)
890 if (chptr->mode.mode & MODE_AUDITORIUM)
892 if (chptr->mode.limit) {
894 ircd_snprintf(0, pbuf, buflen, "%u", chptr->mode.limit);
895 previous_parameter = 1;
897 if (chptr->mode.access) {
899 if (previous_parameter)
901 ircd_snprintf(0, pbuf, buflen, "%u", chptr->mode.access);
902 previous_parameter = 1;
904 if (*chptr->mode.altchan) {
906 if (previous_parameter)
908 strcat(pbuf, chptr->mode.altchan);
909 previous_parameter = 1;
911 if (*chptr->mode.noflood) {
913 if (previous_parameter)
915 strcat(pbuf, chptr->mode.noflood);
916 previous_parameter = 1;
918 if (*chptr->mode.key) {
920 if (previous_parameter)
922 if (is_chan_op(cptr, chptr) || IsServer(cptr) || IsOper(cptr)) {
923 strcat(pbuf, chptr->mode.key);
926 previous_parameter = 1;
928 if (*chptr->mode.apass) {
930 if (previous_parameter)
932 if (IsServer(cptr) || IsOper(cptr)) {
933 strcat(pbuf, chptr->mode.apass);
936 previous_parameter = 1;
938 if (*chptr->mode.upass) {
940 if (previous_parameter)
942 if (IsServer(cptr) || (member && IsChanOp(member) && OpLevel(member) == 0) || IsOper(cptr)) {
943 strcat(pbuf, chptr->mode.upass);
950 /** Compare two members oplevel
952 * @param mp1 Pointer to a pointer to a membership
953 * @param mp2 Pointer to a pointer to a membership
955 * @returns 0 if equal, -1 if mp1 is lower, +1 otherwise.
959 int compare_member_oplevel(const void *mp1, const void *mp2)
961 struct Membership const* member1 = *(struct Membership const**)mp1;
962 struct Membership const* member2 = *(struct Membership const**)mp2;
963 if (member1->oplevel == member2->oplevel)
965 return (member1->oplevel < member2->oplevel) ? -1 : 1;
968 /* send "cptr" a full list of the modes for channel chptr.
970 * Sends a BURST line to cptr, bursting all the modes for the channel.
972 * @param cptr Client pointer
973 * @param chptr Channel pointer
975 void send_channel_modes(struct Client *cptr, struct Channel *chptr)
977 /* The order in which modes are generated is now mandatory */
978 static unsigned int current_flags[4] =
979 { 0, CHFL_VOICE, CHFL_CHANOP, CHFL_CHANOP | CHFL_VOICE };
985 struct Membership* member;
987 char modebuf[MODEBUFLEN];
988 char parabuf[MODEBUFLEN];
990 int number_of_ops = 0;
991 int opped_members_index = 0;
992 struct Membership** opped_members = NULL;
993 int last_oplevel = 0;
994 int send_oplevels = 0;
999 if (IsLocalChannel(chptr->chname))
1002 member = chptr->members;
1003 lp2 = chptr->banlist;
1005 *modebuf = *parabuf = '\0';
1006 channel_modes(cptr, modebuf, parabuf, sizeof(parabuf), chptr, 0);
1008 for (first = 1; full; first = 0) /* Loop for multiple messages */
1010 full = 0; /* Assume by default we get it
1011 all in one message */
1013 /* (Continued) prefix: "<Y> B <channel> <TS>" */
1014 /* is there any better way we can do this? */
1015 mb = msgq_make(&me, "%C " TOK_BURST " %H %Tu", &me, chptr,
1016 chptr->creationtime);
1018 if (first && modebuf[1]) /* Add simple modes (Aiklmnpstu)
1021 /* prefix: "<Y> B <channel> <TS>[ <modes>[ <params>]]" */
1022 msgq_append(&me, mb, " %s", modebuf);
1025 msgq_append(&me, mb, " %s", parabuf);
1029 * Attach nicks, comma separated " nick[:modes],nick[:modes],..."
1031 * First find all opless members.
1032 * Run 2 times over all members, to group the members with
1033 * and without voice together.
1034 * Then run 2 times over all opped members (which are ordered
1035 * by op-level) to also group voice and non-voice together.
1037 for (first = 1; flag_cnt < 4; new_mode = 1, ++flag_cnt)
1041 if (flag_cnt < 2 && IsChanOp(member))
1044 * The first loop (to find all non-voice/op), we count the ops.
1045 * The second loop (to find all voiced non-ops), store the ops
1046 * in a dynamic array.
1051 opped_members[opped_members_index++] = member;
1052 /* We also send oplevels if anyone is below the weakest level. */
1053 if (OpLevel(member) < MAXOPLEVEL)
1056 /* Only handle the members with the flags that we are interested in. */
1057 if ((member->status & CHFL_VOICED_OR_OPPED) == current_flags[flag_cnt])
1059 if (msgq_bufleft(mb) < NUMNICKLEN + 3 + MAXOPLEVELDIGITS)
1060 /* The 3 + MAXOPLEVELDIGITS is a possible ",:v999". */
1062 full = 1; /* Make sure we continue after
1063 sending it so far */
1064 /* Ensure the new BURST line contains the current
1065 * ":mode", except when there is no mode yet. */
1066 new_mode = (flag_cnt > 0) ? 1 : 0;
1067 break; /* Do not add this member to this message */
1069 msgq_append(&me, mb, "%c%C", first ? ' ' : ',', member->user);
1070 first = 0; /* From now on, use commas to add new nicks */
1073 * Do we have a nick with a new mode ?
1074 * Or are we starting a new BURST line?
1079 * This means we are at the _first_ member that has only
1080 * voice, or the first member that has only ops, or the
1081 * first member that has voice and ops (so we get here
1082 * at most three times, plus once for every start of
1083 * a continued BURST line where only these modes is current.
1084 * In the two cases where the current mode includes ops,
1085 * we need to add the _absolute_ value of the oplevel to the mode.
1087 char tbuf[3 + MAXOPLEVELDIGITS] = ":";
1090 if (HasVoice(member)) /* flag_cnt == 1 or 3 */
1092 if (IsChanOp(member)) /* flag_cnt == 2 or 3 */
1094 /* append the absolute value of the oplevel */
1096 loc += ircd_snprintf(0, tbuf + loc, sizeof(tbuf) - loc, "%u", last_oplevel = member->oplevel);
1101 msgq_append(&me, mb, tbuf);
1104 else if (send_oplevels && flag_cnt > 1 && last_oplevel != member->oplevel)
1107 * This can't be the first member of a (continued) BURST
1108 * message because then either flag_cnt == 0 or new_mode == 1
1109 * Now we need to append the incremental value of the oplevel.
1111 char tbuf[2 + MAXOPLEVELDIGITS];
1112 ircd_snprintf(0, tbuf, sizeof(tbuf), ":%u", member->oplevel - last_oplevel);
1113 last_oplevel = member->oplevel;
1114 msgq_append(&me, mb, tbuf);
1117 /* Go to the next `member'. */
1119 member = member->next_member;
1121 member = opped_members[++opped_members_index];
1126 /* Point `member' at the start of the list again. */
1129 member = chptr->members;
1130 /* Now, after one loop, we know the number of ops and can
1131 * allocate the dynamic array with pointer to the ops. */
1132 opped_members = (struct Membership**)
1133 MyMalloc((number_of_ops + 1) * sizeof(struct Membership*));
1134 opped_members[number_of_ops] = NULL; /* Needed for loop termination */
1138 /* At the end of the second loop, sort the opped members with
1139 * increasing op-level, so that we will output them in the
1140 * correct order (and all op-level increments stay positive) */
1142 qsort(opped_members, number_of_ops,
1143 sizeof(struct Membership*), compare_member_oplevel);
1144 /* The third and fourth loop run only over the opped members. */
1145 member = opped_members[(opped_members_index = 0)];
1148 } /* loop over 0,+v,+o,+ov */
1152 /* Attach all bans, space separated " :%ban ban ..." */
1153 for (first = 2; lp2; lp2 = lp2->next)
1155 len = strlen(lp2->banstr);
1156 if (msgq_bufleft(mb) < len + 1 + first)
1157 /* The +1 stands for the added ' '.
1158 * The +first stands for the added ":%".
1164 msgq_append(&me, mb, " %s%s", first ? ":%" : "",
1170 send_buffer(cptr, mb, 0); /* Send this message */
1172 } /* Continue when there was something
1173 that didn't fit (full==1) */
1175 MyFree(opped_members);
1176 if (feature_bool(FEAT_TOPIC_BURST) && (chptr->topic[0] != '\0'))
1177 sendcmdto_one(&me, CMD_TOPIC, cptr, "%H %Tu %Tu :%s", chptr,
1178 chptr->creationtime, chptr->topic_time, chptr->topic);
1181 /** Canonify a mask.
1184 * @author Carlo Wood (Run),
1187 * When the nick is longer then NICKLEN, it is cut off (its an error of course).
1188 * When the user name or host name are too long (USERLEN and HOSTLEN
1189 * respectively) then they are cut off at the start with a '*'.
1191 * The following transformations are made:
1193 * 1) xxx -> nick!*@*
1194 * 2) xxx.xxx -> *!*\@host
1195 * 3) xxx\!yyy -> nick!user\@*
1196 * 4) xxx\@yyy -> *!user\@host
1197 * 5) xxx!yyy\@zzz -> nick!user\@host
1199 * @param mask The uncanonified mask.
1200 * @returns The updated mask in a static buffer.
1202 char *pretty_mask(char *mask)
1204 static char star[2] = { '*', 0 };
1205 static char retmask[NICKLEN + USERLEN + HOSTLEN + 3];
1206 char *last_dot = NULL;
1209 /* Case 1: default */
1214 /* Do a _single_ pass through the characters of the mask: */
1215 for (ptr = mask; *ptr; ++ptr)
1219 /* Case 3 or 5: Found first '!' (without finding a '@' yet) */
1223 else if (*ptr == '@')
1225 /* Case 4: Found last '@' (without finding a '!' yet) */
1230 else if (*ptr == '.' || *ptr == ':')
1232 /* Case 2: Found character specific to IP or hostname (without
1233 * finding a '!' or '@' yet) */
1243 /* Case 4 or 5: Found last '@' */
1249 if (user == star && last_dot)
1259 char *nick_end = (user != star) ? user - 1 : ptr;
1260 if (nick_end - nick > NICKLEN)
1266 char *user_end = (host != star) ? host - 1 : ptr;
1267 if (user_end - user > USERLEN)
1269 user = user_end - USERLEN;
1274 if (host != star && ptr - host > HOSTLEN)
1276 host = ptr - HOSTLEN;
1279 ircd_snprintf(0, retmask, sizeof(retmask), "%s!%s@%s", nick, user, host);
1283 /** send a banlist to a client for a channel
1285 * @param cptr Client to send the banlist to.
1286 * @param chptr Channel whose banlist to send.
1288 static void send_ban_list(struct Client* cptr, struct Channel* chptr)
1295 for (lp = chptr->banlist; lp; lp = lp->next)
1296 send_reply(cptr, RPL_BANLIST, chptr->chname, lp->banstr, lp->who, lp->when);
1298 send_reply(cptr, RPL_ENDOFBANLIST, chptr->chname);
1301 /** Get a channel block, creating if necessary.
1302 * Get Channel block for chname (and allocate a new channel
1303 * block, if it didn't exists before).
1305 * @param cptr Client joining the channel.
1306 * @param chname The name of the channel to join.
1307 * @param flag set to CGT_CREATE to create the channel if it doesn't
1310 * @returns NULL if the channel is invalid, doesn't exist and CGT_CREATE
1311 * wasn't specified or a pointer to the channel structure
1313 struct Channel *get_channel(struct Client *cptr, char *chname, ChannelGetType flag)
1315 struct Channel *chptr;
1318 if (EmptyString(chname))
1321 len = strlen(chname);
1322 if (MyUser(cptr) && len > CHANNELLEN)
1325 *(chname + CHANNELLEN) = '\0';
1327 if ((chptr = FindChannel(chname)))
1329 if (flag == CGT_CREATE)
1331 chptr = (struct Channel*) MyMalloc(sizeof(struct Channel) + len);
1333 ++UserStats.channels;
1334 memset(chptr, 0, sizeof(struct Channel));
1335 strcpy(chptr->chname, chname);
1336 if (GlobalChannelList)
1337 GlobalChannelList->prev = chptr;
1339 chptr->next = GlobalChannelList;
1340 chptr->creationtime = MyUser(cptr) ? TStime() : (time_t) 0;
1341 GlobalChannelList = chptr;
1347 /** invite a user to a channel.
1349 * Adds an invite for a user to a channel. Limits the number of invites
1350 * to FEAT_MAXCHANNELSPERUSER. Does not sent notification to the user.
1352 * @param cptr The client to be invited.
1353 * @param chptr The channel to be invited to.
1355 void add_invite(struct Client *cptr, struct Channel *chptr)
1357 struct SLink *inv, **tmp;
1358 unsigned int maxchans;
1360 del_invite(cptr, chptr);
1362 * Delete last link in chain if the list is max length
1364 assert(list_length((cli_user(cptr))->invited) == (cli_user(cptr))->invites);
1365 maxchans = cli_confs(cptr)->value.aconf ? ConfMaxChannels(cli_confs(cptr)->value.aconf) : feature_int(FEAT_MAXCHANNELSPERUSER);
1366 if (((cli_user(cptr))->invites >= maxchans && !HasPriv(cptr, PRIV_CHAN_LIMIT)) || cli_user(cptr)->invites > 100) /* Hard limit of 100. */
1367 del_invite(cptr, (cli_user(cptr))->invited->value.chptr);
1369 * Add client to channel invite list
1372 inv->value.cptr = cptr;
1373 inv->next = chptr->invites;
1374 chptr->invites = inv;
1376 * Add channel to the end of the client invite list
1378 for (tmp = &((cli_user(cptr))->invited); *tmp; tmp = &((*tmp)->next));
1380 inv->value.chptr = chptr;
1383 (cli_user(cptr))->invites++;
1386 /** Delete an invite
1387 * Delete Invite block from channel invite list and client invite list
1389 * @param cptr Client pointer
1390 * @param chptr Channel pointer
1392 void del_invite(struct Client *cptr, struct Channel *chptr)
1394 struct SLink **inv, *tmp;
1396 for (inv = &(chptr->invites); (tmp = *inv); inv = &tmp->next)
1397 if (tmp->value.cptr == cptr)
1402 (cli_user(cptr))->invites--;
1406 for (inv = &((cli_user(cptr))->invited); (tmp = *inv); inv = &tmp->next)
1407 if (tmp->value.chptr == chptr)
1416 /** @page zombie Explanation of Zombies
1420 * A channel member is turned into a zombie when he is kicked from a
1421 * channel but his server has not acknowledged the kick. Servers that
1422 * see the member as a zombie can accept actions he performed before
1423 * being kicked, without allowing chanop operations from outsiders or
1424 * desyncing the network.
1432 * X --a--> A --b--> B --d--> D
1437 * Where `who' is being KICK-ed by a "KICK" message received by server 'A'
1438 * via 'a', or on server 'B' via either 'b' or 'c', or on server D via 'd'.
1440 * a) On server A : set CHFL_ZOMBIE for `who' (lp) and pass on the KICK.
1441 * Remove the user immediately when no users are left on the channel.
1442 * b) On server B : remove the user (who/lp) from the channel, send a
1443 * PART upstream (to A) and pass on the KICK.
1444 * c) KICKed by `client'; On server B : remove the user (who/lp) from the
1445 * channel, and pass on the KICK.
1446 * d) On server D : remove the user (who/lp) from the channel, and pass on
1450 * - Setting the ZOMBIE flag never hurts, we either remove the
1451 * client after that or we don't.
1452 * - The KICK message was already passed on, as should be in all cases.
1453 * - `who' is removed in all cases except case a) when users are left.
1454 * - A PART is only sent upstream in case b).
1460 * 1 --- 2 --- 3 --- 4 --- 5
1465 * We also need to turn 'who' into a zombie on servers 1 and 6,
1466 * because a KICK from 'who' (kicking someone else in that direction)
1467 * can arrive there afterward - which should not be bounced itself.
1468 * Therefore case a) also applies for servers 1 and 6.
1473 /** Turn a user on a channel into a zombie
1474 * This function turns a user into a zombie (see \ref zombie)
1476 * @param member The structure representing this user on this channel.
1477 * @param who The client that is being kicked.
1478 * @param cptr The connection the kick came from.
1479 * @param sptr The client that is doing the kicking.
1480 * @param chptr The channel the user is being kicked from.
1482 void make_zombie(struct Membership* member, struct Client* who,
1483 struct Client* cptr, struct Client* sptr, struct Channel* chptr)
1485 assert(0 != member);
1490 /* Default for case a): */
1493 /* Case b) or c) ?: */
1494 if (MyUser(who)) /* server 4 */
1496 if (IsServer(cptr)) /* Case b) ? */
1497 sendcmdto_one(who, CMD_PART, cptr, "%H", chptr);
1498 remove_user_from_channel(who, chptr);
1501 if (cli_from(who) == cptr) /* True on servers 1, 5 and 6 */
1503 struct Client *acptr = IsServer(sptr) ? sptr : (cli_user(sptr))->server;
1504 for (; acptr != &me; acptr = (cli_serv(acptr))->up)
1505 if (acptr == (cli_user(who))->server) /* Case d) (server 5) */
1507 remove_user_from_channel(who, chptr);
1512 /* Case a) (servers 1, 2, 3 and 6) */
1513 if (channel_all_zombies(chptr))
1514 remove_user_from_channel(who, chptr);
1516 /* XXX Can't actually call Debug here; if the channel is all zombies,
1517 * chptr will no longer exist when we get here.
1518 Debug((DEBUG_INFO, "%s is now a zombie on %s", who->name, chptr->chname));
1522 /** returns the number of zombies on a channel
1523 * @param chptr Channel to count zombies in.
1525 * @returns The number of zombies on the channel.
1527 int number_of_zombies(struct Channel *chptr)
1529 struct Membership* member;
1533 for (member = chptr->members; member; member = member->next_member) {
1534 if (IsZombie(member))
1540 /** Concatenate some strings together.
1541 * This helper function builds an argument string in strptr, consisting
1542 * of the original string, a space, and str1 and str2 concatenated (if,
1543 * of course, str2 is not NULL)
1545 * @param strptr The buffer to concatenate into
1546 * @param strptr_i modified offset to the position to modify
1547 * @param str1 The string to concatenate from.
1548 * @param str2 The second string to contatenate from.
1549 * @param c Charactor to separate the string from str1 and str2.
1552 build_string(char *strptr, int *strptr_i, const char *str1,
1553 const char *str2, char c)
1556 strptr[(*strptr_i)++] = c;
1559 strptr[(*strptr_i)++] = *(str1++);
1563 strptr[(*strptr_i)++] = *(str2++);
1565 strptr[(*strptr_i)] = '\0';
1568 /** Flush out the modes
1569 * This is the workhorse of our ModeBuf suite; this actually generates the
1570 * output MODE commands, HACK notices, or whatever. It's pretty complicated.
1572 * @param mbuf The mode buffer to flush
1573 * @param all If true, flush all modes, otherwise leave partial modes in the
1579 modebuf_flush_int(struct ModeBuf *mbuf, int all)
1581 /* we only need the flags that don't take args right now */
1582 static ulong64 flags[] = {
1583 /* MODE_CHANOP, 'o', */
1584 /* MODE_VOICE, 'v', */
1587 MODE_MODERATED, 'm',
1588 MODE_TOPICLIMIT, 't',
1589 MODE_INVITEONLY, 'i',
1590 MODE_NOPRIVMSGS, 'n',
1593 MODE_REGISTERED, 'R',
1594 /* MODE_KEY, 'k', */
1595 /* MODE_BAN, 'b', */
1597 /* MODE_APASS, 'A', */
1598 /* MODE_UPASS, 'U', */
1602 /* MODE_ALTCHAN, 'F', */
1603 /* MODE_NOFLOOD, 'f', */
1607 MODE_QUARANTINE, 'Q',
1608 MODE_AUDITORIUM, 'u',
1611 static ulong64 local_flags[] = {
1612 MODE_WASDELJOINS, 'd',
1618 struct Client *app_source; /* where the MODE appears to come from */
1620 char addbuf[20], addbuf_local[20]; /* accumulates +psmtin, etc. */
1621 int addbuf_i = 0, addbuf_local_i = 0;
1622 char rembuf[20], rembuf_local[20]; /* accumulates -psmtin, etc. */
1623 int rembuf_i = 0, rembuf_local_i = 0;
1624 char *bufptr; /* we make use of indirection to simplify the code */
1627 char addstr[BUFSIZE]; /* accumulates MODE parameters to add */
1629 char remstr[BUFSIZE]; /* accumulates MODE parameters to remove */
1631 char *strptr; /* more indirection to simplify the code */
1634 int totalbuflen = BUFSIZE - 200; /* fuzz factor -- don't overrun buffer! */
1637 char limitbuf[20],accessbuf[20]; /* convert limits to strings */
1639 ulong64 limitdel = MODE_LIMIT;
1640 ulong64 accessdel = MODE_ACCESS;
1644 /* If the ModeBuf is empty, we have nothing to do */
1645 if (mbuf->mb_add == 0 && mbuf->mb_rem == 0 && mbuf->mb_count == 0)
1648 /* Ok, if we were given the OPMODE flag, or its a server, hide the source.
1650 if (feature_bool(FEAT_HIS_MODEWHO) &&
1651 (mbuf->mb_dest & MODEBUF_DEST_OPMODE ||
1652 IsServer(mbuf->mb_source) ||
1653 IsMe(mbuf->mb_source)))
1656 app_source = mbuf->mb_source;
1659 * Account for user we're bouncing; we have to get it in on the first
1660 * bounced MODE, or we could have problems
1662 if (mbuf->mb_dest & MODEBUF_DEST_DEOP)
1663 totalbuflen -= 6; /* numeric nick == 5, plus one space */
1665 /* Calculate the simple flags */
1666 for (flag_p = flags; flag_p[0]; flag_p += 2) {
1667 if (*flag_p & mbuf->mb_add)
1668 addbuf[addbuf_i++] = flag_p[1];
1669 else if (*flag_p & mbuf->mb_rem)
1670 rembuf[rembuf_i++] = flag_p[1];
1673 /* Some flags may be for local display only. */
1674 for (flag_p = local_flags; flag_p[0]; flag_p += 2) {
1675 if (*flag_p & mbuf->mb_add)
1676 addbuf_local[addbuf_local_i++] = flag_p[1];
1677 else if (*flag_p & mbuf->mb_rem)
1678 rembuf_local[rembuf_local_i++] = flag_p[1];
1681 /* Now go through the modes with arguments... */
1682 for (i = 0; i < mbuf->mb_count; i++) {
1683 if (MB_TYPE(mbuf, i) & MODE_ADD) { /* adding or removing? */
1685 bufptr_i = &addbuf_i;
1688 bufptr_i = &rembuf_i;
1691 if (MB_TYPE(mbuf, i) & (MODE_CHANOP | MODE_VOICE)) {
1692 tmp = strlen(cli_name(MB_CLIENT(mbuf, i)));
1694 if ((totalbuflen - IRCD_MAX(9, tmp)) <= 0) /* don't overflow buffer */
1695 MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
1697 bufptr[(*bufptr_i)++] = MB_TYPE(mbuf, i) & MODE_CHANOP ? 'o' : 'v';
1698 totalbuflen -= IRCD_MAX(9, tmp) + 1;
1700 } else if (MB_TYPE(mbuf, i) & (MODE_BAN | MODE_APASS | MODE_UPASS | MODE_ALTCHAN | MODE_NOFLOOD)) {
1701 tmp = strlen(MB_STRING(mbuf, i));
1703 if ((totalbuflen - tmp) <= 0) /* don't overflow buffer */
1704 MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
1707 switch(MB_TYPE(mbuf, i) & (MODE_BAN | MODE_APASS | MODE_UPASS | MODE_ALTCHAN | MODE_NOFLOOD))
1725 bufptr[(*bufptr_i)++] = mode_char;
1726 totalbuflen -= tmp + 1;
1728 } else if (MB_TYPE(mbuf, i) & MODE_KEY) {
1729 tmp = (mbuf->mb_dest & MODEBUF_DEST_NOKEY ? 1 :
1730 strlen(MB_STRING(mbuf, i)));
1732 if ((totalbuflen - tmp) <= 0) /* don't overflow buffer */
1733 MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
1735 bufptr[(*bufptr_i)++] = 'k';
1736 totalbuflen -= tmp + 1;
1738 } else if (MB_TYPE(mbuf, i) & (MODE_LIMIT)) {
1739 /* if it's a limit, we also format the number */
1740 ircd_snprintf(0, limitbuf, sizeof(limitbuf), "%u", MB_UINT(mbuf, i));
1742 tmp = strlen(limitbuf);
1744 if ((totalbuflen - tmp) <= 0) /* don't overflow buffer */
1745 MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
1747 bufptr[(*bufptr_i)++] = 'l';
1748 totalbuflen -= tmp + 1;
1750 } else if (MB_TYPE(mbuf, i) & (MODE_ACCESS)) {
1751 /* if it's a limit, we also format the number */
1752 ircd_snprintf(0, accessbuf, sizeof(accessbuf), "%u", MB_UINT(mbuf, i));
1754 tmp = strlen(accessbuf);
1756 if ((totalbuflen - tmp) <= 0) /* don't overflow buffer */
1757 MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
1759 bufptr[(*bufptr_i)++] = 'a';
1760 totalbuflen -= tmp + 1;
1765 /* terminate the mode strings */
1766 addbuf[addbuf_i] = '\0';
1767 rembuf[rembuf_i] = '\0';
1768 addbuf_local[addbuf_local_i] = '\0';
1769 rembuf_local[rembuf_local_i] = '\0';
1771 /* If we're building a user visible MODE or HACK... */
1772 if (mbuf->mb_dest & (MODEBUF_DEST_CHANNEL | MODEBUF_DEST_HACK2 |
1773 MODEBUF_DEST_HACK3 | MODEBUF_DEST_HACK4 |
1774 MODEBUF_DEST_LOG)) {
1775 /* Set up the parameter strings */
1781 for (i = 0; i < mbuf->mb_count; i++) {
1782 if (MB_TYPE(mbuf, i) & MODE_SAVE)
1785 if (MB_TYPE(mbuf, i) & MODE_ADD) { /* adding or removing? */
1787 strptr_i = &addstr_i;
1790 strptr_i = &remstr_i;
1793 /* deal with clients... */
1794 if (MB_TYPE(mbuf, i) & (MODE_CHANOP | MODE_VOICE))
1795 build_string(strptr, strptr_i, cli_name(MB_CLIENT(mbuf, i)), 0, ' ');
1797 /* deal with bans... */
1798 else if (MB_TYPE(mbuf, i) & (MODE_BAN))
1799 build_string(strptr, strptr_i, MB_STRING(mbuf, i), 0, ' ');
1801 /* deal with keys... */
1802 else if (MB_TYPE(mbuf, i) & MODE_KEY)
1803 build_string(strptr, strptr_i, mbuf->mb_dest & MODEBUF_DEST_NOKEY ?
1804 "*" : MB_STRING(mbuf, i), 0, ' ');
1806 /* deal with invisible passwords */
1807 else if (MB_TYPE(mbuf, i) & (MODE_APASS | MODE_UPASS))
1808 build_string(strptr, strptr_i, "*", 0, ' ');
1811 * deal with limit; note we cannot include the limit parameter if we're
1814 else if ((MB_TYPE(mbuf, i) & (MODE_ADD | MODE_LIMIT)) ==
1815 (MODE_ADD | MODE_LIMIT))
1816 build_string(strptr, strptr_i, limitbuf, 0, ' ');
1817 else if ((MB_TYPE(mbuf, i) & (MODE_ADD | MODE_ACCESS)) ==
1818 (MODE_ADD | MODE_ACCESS))
1819 build_string(strptr, strptr_i, accessbuf, 0, ' ');
1821 else if (MB_TYPE(mbuf, i) & MODE_ALTCHAN)
1822 build_string(strptr, strptr_i, MB_STRING(mbuf, i), 0, ' ');
1823 else if ((MB_TYPE(mbuf, i) & (MODE_ADD | MODE_NOFLOOD)) ==
1824 (MODE_ADD | MODE_NOFLOOD))
1825 build_string(strptr, strptr_i, MB_STRING(mbuf, i), 0, ' ');
1828 /* send the messages off to their destination */
1829 if (mbuf->mb_dest & MODEBUF_DEST_HACK2)
1830 sendto_opmask_butone(0, SNO_HACK2, "HACK(2): %s MODE %s %s%s%s%s%s%s "
1832 cli_name(feature_bool(FEAT_HIS_SNOTICES) ?
1833 mbuf->mb_source : app_source),
1834 mbuf->mb_channel->chname,
1835 rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
1836 addbuf, remstr, addstr,
1837 mbuf->mb_channel->creationtime);
1839 if (mbuf->mb_dest & MODEBUF_DEST_HACK3)
1840 sendto_opmask_butone(0, SNO_HACK3, "BOUNCE or HACK(3): %s MODE %s "
1841 "%s%s%s%s%s%s [%Tu]",
1842 cli_name(feature_bool(FEAT_HIS_SNOTICES) ?
1843 mbuf->mb_source : app_source),
1844 mbuf->mb_channel->chname, rembuf_i ? "-" : "",
1845 rembuf, addbuf_i ? "+" : "", addbuf, remstr, addstr,
1846 mbuf->mb_channel->creationtime);
1848 if (mbuf->mb_dest & MODEBUF_DEST_HACK4)
1849 sendto_opmask_butone(0, SNO_HACK4, "HACK(4): %s MODE %s %s%s%s%s%s%s "
1851 cli_name(feature_bool(FEAT_HIS_SNOTICES) ?
1852 mbuf->mb_source : app_source),
1853 mbuf->mb_channel->chname,
1854 rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
1855 addbuf, remstr, addstr,
1856 mbuf->mb_channel->creationtime);
1858 if (mbuf->mb_dest & MODEBUF_DEST_LOG)
1859 log_write(LS_OPERMODE, L_INFO, LOG_NOSNOTICE,
1860 "%#C OPMODE %H %s%s%s%s%s%s", mbuf->mb_source,
1861 mbuf->mb_channel, rembuf_i ? "-" : "", rembuf,
1862 addbuf_i ? "+" : "", addbuf, remstr, addstr);
1864 if (mbuf->mb_dest & MODEBUF_DEST_CHANNEL)
1865 sendcmdto_channel_butserv_butone(app_source, CMD_MODE, mbuf->mb_channel, NULL, 0,
1866 "%H %s%s%s%s%s%s%s%s", mbuf->mb_channel,
1867 rembuf_i || rembuf_local_i ? "-" : "",
1868 rembuf, rembuf_local,
1869 addbuf_i || addbuf_local_i ? "+" : "",
1870 addbuf, addbuf_local,
1874 /* Now are we supposed to propagate to other servers? */
1875 if (mbuf->mb_dest & MODEBUF_DEST_SERVER) {
1876 /* set up parameter string */
1883 * limit is supressed if we're removing it; we have to figure out which
1884 * direction is the direction for it to be removed, though...
1886 limitdel |= (mbuf->mb_dest & MODEBUF_DEST_BOUNCE) ? MODE_DEL : MODE_ADD;
1887 accessdel |= (mbuf->mb_dest & MODEBUF_DEST_BOUNCE) ? MODE_DEL : MODE_ADD;
1889 for (i = 0; i < mbuf->mb_count; i++) {
1890 if (MB_TYPE(mbuf, i) & MODE_SAVE)
1893 if (MB_TYPE(mbuf, i) & MODE_ADD) { /* adding or removing? */
1895 strptr_i = &addstr_i;
1898 strptr_i = &remstr_i;
1901 /* if we're changing oplevels and we know the oplevel, pass it on */
1902 if ((MB_TYPE(mbuf, i) & MODE_CHANOP)
1903 && MB_OPLEVEL(mbuf, i) < MAXOPLEVEL)
1904 *strptr_i += ircd_snprintf(0, strptr + *strptr_i, BUFSIZE - *strptr_i,
1906 NumNick(MB_CLIENT(mbuf, i)),
1907 MB_OPLEVEL(mbuf, i));
1909 /* deal with other modes that take clients */
1910 else if (MB_TYPE(mbuf, i) & (MODE_CHANOP | MODE_VOICE))
1911 build_string(strptr, strptr_i, NumNick(MB_CLIENT(mbuf, i)), ' ');
1913 /* deal with modes that take strings */
1914 else if (MB_TYPE(mbuf, i) & (MODE_KEY | MODE_BAN | MODE_APASS | MODE_UPASS | MODE_ALTCHAN | MODE_NOFLOOD))
1915 build_string(strptr, strptr_i, MB_STRING(mbuf, i), 0, ' ');
1918 * deal with the limit. Logic here is complicated; if HACK2 is set,
1919 * we're bouncing the mode, so sense is reversed, and we have to
1920 * include the original limit if it looks like it's being removed
1922 else if ((MB_TYPE(mbuf, i) & limitdel) == limitdel)
1923 build_string(strptr, strptr_i, limitbuf, 0, ' ');
1924 else if ((MB_TYPE(mbuf, i) & accessdel) == accessdel)
1925 build_string(strptr, strptr_i, accessbuf, 0, ' ');
1928 /* we were told to deop the source */
1929 if (mbuf->mb_dest & MODEBUF_DEST_DEOP) {
1930 addbuf[addbuf_i++] = 'o'; /* remember, sense is reversed */
1931 addbuf[addbuf_i] = '\0'; /* terminate the string... */
1932 build_string(addstr, &addstr_i, NumNick(mbuf->mb_source), ' ');
1934 /* mark that we've done this, so we don't do it again */
1935 mbuf->mb_dest &= ~MODEBUF_DEST_DEOP;
1938 if (mbuf->mb_dest & MODEBUF_DEST_OPMODE) {
1939 /* If OPMODE was set, we're propagating the mode as an OPMODE message */
1940 sendcmdto_serv_butone(mbuf->mb_source, CMD_OPMODE, mbuf->mb_connect,
1941 "%H %s%s%s%s%s%s", mbuf->mb_channel,
1942 rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
1943 addbuf, remstr, addstr);
1944 } else if (mbuf->mb_dest & MODEBUF_DEST_BOUNCE) {
1946 * If HACK2 was set, we're bouncing; we send the MODE back to
1947 * the connection we got it from with the senses reversed and
1948 * the proper TS; origin is us
1950 sendcmdto_one(&me, CMD_MODE, mbuf->mb_connect, "%H %s%s%s%s%s%s %Tu",
1951 mbuf->mb_channel, addbuf_i ? "-" : "", addbuf,
1952 rembuf_i ? "+" : "", rembuf, addstr, remstr,
1953 mbuf->mb_channel->creationtime);
1956 * We're propagating a normal (or HACK3 or HACK4) MODE command
1957 * to the rest of the network. We send the actual channel TS.
1959 sendcmdto_serv_butone(mbuf->mb_source, CMD_MODE, mbuf->mb_connect,
1960 "%H %s%s%s%s%s%s %Tu", mbuf->mb_channel,
1961 rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
1962 addbuf, remstr, addstr,
1963 mbuf->mb_channel->creationtime);
1967 /* We've drained the ModeBuf... */
1972 /* reinitialize the mode-with-arg slots */
1973 for (i = 0; i < MAXMODEPARAMS; i++) {
1974 /* If we saved any, pack them down */
1975 if (MB_TYPE(mbuf, i) & MODE_SAVE) {
1976 mbuf->mb_modeargs[mbuf->mb_count] = mbuf->mb_modeargs[i];
1977 MB_TYPE(mbuf, mbuf->mb_count) &= ~MODE_SAVE; /* don't save anymore */
1979 if (mbuf->mb_count++ == i) /* don't overwrite our hard work */
1981 } else if (MB_TYPE(mbuf, i) & MODE_FREE)
1982 MyFree(MB_STRING(mbuf, i)); /* free string if needed */
1984 MB_TYPE(mbuf, i) = 0;
1985 MB_UINT(mbuf, i) = 0;
1988 /* If we're supposed to flush it all, do so--all hail tail recursion */
1989 if (all && mbuf->mb_count)
1990 return modebuf_flush_int(mbuf, 1);
1995 /** Initialise a modebuf
1996 * This routine just initializes a ModeBuf structure with the information
1997 * needed and the options given.
1999 * @param mbuf The mode buffer to initialise.
2000 * @param source The client that is performing the mode.
2002 * @param chan The channel that the mode is being performed upon.
2006 modebuf_init(struct ModeBuf *mbuf, struct Client *source,
2007 struct Client *connect, struct Channel *chan, unsigned int dest)
2012 assert(0 != source);
2016 if (IsLocalChannel(chan->chname)) dest &= ~MODEBUF_DEST_SERVER;
2020 mbuf->mb_source = source;
2021 mbuf->mb_connect = connect;
2022 mbuf->mb_channel = chan;
2023 mbuf->mb_dest = dest;
2026 /* clear each mode-with-parameter slot */
2027 for (i = 0; i < MAXMODEPARAMS; i++) {
2028 MB_TYPE(mbuf, i) = 0;
2029 MB_UINT(mbuf, i) = 0;
2033 /** Append a new mode to a modebuf
2034 * This routine simply adds modes to be added or deleted; do a binary OR
2035 * with either MODE_ADD or MODE_DEL
2037 * @param mbuf Mode buffer
2038 * @param mode MODE_ADD or MODE_DEL OR'd with MODE_PRIVATE etc.
2041 modebuf_mode(struct ModeBuf *mbuf, ulong64 mode)
2044 assert(0 != (mode & (MODE_ADD | MODE_DEL)));
2046 mode &= (MODE_ADD | MODE_DEL | MODE_PRIVATE | MODE_SECRET | MODE_MODERATED |
2047 MODE_TOPICLIMIT | MODE_INVITEONLY | MODE_NOPRIVMSGS | MODE_REGONLY |
2048 MODE_DELJOINS | MODE_WASDELJOINS | MODE_REGISTERED | MODE_PERSIST |
2049 MODE_NOCOLOUR | MODE_NOCTCP | MODE_NOAMSGS | MODE_NONOTICE |
2050 MODE_QUARANTINE | MODE_AUDITORIUM);
2052 if (!(mode & ~(MODE_ADD | MODE_DEL))) /* don't add empty modes... */
2055 if (mode & MODE_ADD) {
2056 mbuf->mb_rem &= ~mode;
2057 mbuf->mb_add |= mode;
2059 mbuf->mb_add &= ~mode;
2060 mbuf->mb_rem |= mode;
2064 /** Append a mode that takes an ulong64 argument to the modebuf
2066 * This routine adds a mode to be added or deleted that takes a unsigned
2067 * ulong64 parameter; mode may *only* be the relevant mode flag ORed with one
2068 * of MODE_ADD or MODE_DEL
2070 * @param mbuf The mode buffer to append to.
2071 * @param mode The mode to append.
2072 * @param uint The argument to the mode.
2075 modebuf_mode_uint(struct ModeBuf *mbuf, ulong64 mode, unsigned int uint)
2078 assert(0 != (mode & (MODE_ADD | MODE_DEL)));
2080 if (mode == (MODE_LIMIT | MODE_DEL)) {
2081 mbuf->mb_rem |= mode;
2084 if (mode == (MODE_ACCESS | MODE_DEL)) {
2085 mbuf->mb_rem |= mode;
2088 MB_TYPE(mbuf, mbuf->mb_count) = mode;
2089 MB_UINT(mbuf, mbuf->mb_count) = uint;
2091 /* when we've reached the maximal count, flush the buffer */
2092 if (++mbuf->mb_count >=
2093 (MAXMODEPARAMS - (mbuf->mb_dest & MODEBUF_DEST_DEOP ? 1 : 0)))
2094 modebuf_flush_int(mbuf, 0);
2097 /** append a string mode
2098 * This routine adds a mode to be added or deleted that takes a string
2099 * parameter; mode may *only* be the relevant mode flag ORed with one of
2100 * MODE_ADD or MODE_DEL
2102 * @param mbuf The mode buffer to append to.
2103 * @param mode The mode to append.
2104 * @param string The string parameter to append.
2105 * @param free If the string should be free'd later.
2108 modebuf_mode_string(struct ModeBuf *mbuf, ulong64 mode, char *string,
2112 assert(0 != (mode & (MODE_ADD | MODE_DEL)));
2114 MB_TYPE(mbuf, mbuf->mb_count) = mode | (free ? MODE_FREE : 0);
2115 MB_STRING(mbuf, mbuf->mb_count) = string;
2117 /* when we've reached the maximal count, flush the buffer */
2118 if (++mbuf->mb_count >=
2119 (MAXMODEPARAMS - (mbuf->mb_dest & MODEBUF_DEST_DEOP ? 1 : 0)))
2120 modebuf_flush_int(mbuf, 0);
2123 /** Append a mode on a client to a modebuf.
2124 * This routine adds a mode to be added or deleted that takes a client
2125 * parameter; mode may *only* be the relevant mode flag ORed with one of
2126 * MODE_ADD or MODE_DEL
2128 * @param mbuf The modebuf to append the mode to.
2129 * @param mode The mode to append.
2130 * @param client The client argument to append.
2131 * @param oplevel The oplevel the user had or will have
2134 modebuf_mode_client(struct ModeBuf *mbuf, ulong64 mode,
2135 struct Client *client, int oplevel)
2138 assert(0 != (mode & (MODE_ADD | MODE_DEL)));
2140 MB_TYPE(mbuf, mbuf->mb_count) = mode;
2141 MB_CLIENT(mbuf, mbuf->mb_count) = client;
2142 MB_OPLEVEL(mbuf, mbuf->mb_count) = oplevel;
2144 /* when we've reached the maximal count, flush the buffer */
2145 if (++mbuf->mb_count >=
2146 (MAXMODEPARAMS - (mbuf->mb_dest & MODEBUF_DEST_DEOP ? 1 : 0)))
2147 modebuf_flush_int(mbuf, 0);
2150 /** Check a channel for join-delayed members.
2151 * @param[in] chan Channel to search.
2152 * @return Non-zero if any members are join-delayed; false if none are.
2155 find_delayed_joins(const struct Channel *chan)
2157 const struct Membership *memb;
2158 for (memb = chan->members; memb; memb = memb->next_member)
2159 if (IsDelayedJoin(memb) && !IsInvisibleJoin(memb))
2164 /** The exported binding for modebuf_flush()
2166 * @param mbuf The mode buffer to flush.
2168 * @see modebuf_flush_int()
2171 modebuf_flush(struct ModeBuf *mbuf)
2173 /* Check if MODE_WASDELJOINS should be set: */
2174 /* Must be set if going -D and some clients are hidden */
2175 if ((mbuf->mb_rem & MODE_DELJOINS)
2176 && !(mbuf->mb_channel->mode.mode & (MODE_DELJOINS | MODE_WASDELJOINS))
2177 && find_delayed_joins(mbuf->mb_channel)) {
2178 mbuf->mb_channel->mode.mode |= MODE_WASDELJOINS;
2179 mbuf->mb_add |= MODE_WASDELJOINS;
2180 mbuf->mb_rem &= ~MODE_WASDELJOINS;
2182 /* Must be cleared if +D is set */
2183 if ((mbuf->mb_add & MODE_DELJOINS)
2184 && ((mbuf->mb_channel->mode.mode & (MODE_WASDELJOINS | MODE_WASDELJOINS))
2185 == (MODE_WASDELJOINS | MODE_WASDELJOINS))) {
2186 mbuf->mb_channel->mode.mode &= ~MODE_WASDELJOINS;
2187 mbuf->mb_add &= ~MODE_WASDELJOINS;
2188 mbuf->mb_rem |= MODE_WASDELJOINS;
2191 return modebuf_flush_int(mbuf, 1);
2194 /* This extracts the simple modes contained in mbuf
2196 * @param mbuf The mode buffer to extract the modes from.
2197 * @param buf The string buffer to write the modes into.
2200 modebuf_extract(struct ModeBuf *mbuf, char *buf)
2202 static ulong64 flags[] = {
2203 /* MODE_CHANOP, 'o', */
2204 /* MODE_VOICE, 'v', */
2207 MODE_MODERATED, 'm',
2208 MODE_TOPICLIMIT, 't',
2209 MODE_INVITEONLY, 'i',
2210 MODE_NOPRIVMSGS, 'n',
2214 MODE_REGISTERED, 'R',
2215 /* MODE_BAN, 'b', */
2224 MODE_QUARANTINE, 'Q',
2227 MODE_AUDITORIUM, 'u',
2232 int i, bufpos = 0, len;
2234 char *key = 0, limitbuf[20], accessbuf[20];
2235 char *apass = 0, *upass = 0, *altchan = 0, *noflood = 0;
2244 for (i = 0; i < mbuf->mb_count; i++) { /* find keys and limits */
2245 if (MB_TYPE(mbuf, i) & MODE_ADD) {
2246 add |= MB_TYPE(mbuf, i) & (MODE_KEY | MODE_LIMIT | MODE_APASS | MODE_UPASS | MODE_ALTCHAN | MODE_ACCESS | MODE_NOFLOOD);
2248 if (MB_TYPE(mbuf, i) & MODE_KEY) /* keep strings */
2249 key = MB_STRING(mbuf, i);
2250 else if (MB_TYPE(mbuf, i) & MODE_LIMIT)
2251 ircd_snprintf(0, limitbuf, sizeof(limitbuf), "%u", MB_UINT(mbuf, i));
2252 else if (MB_TYPE(mbuf, i) & MODE_ACCESS)
2253 ircd_snprintf(0, accessbuf, sizeof(accessbuf), "%u", MB_UINT(mbuf, i));
2254 else if (MB_TYPE(mbuf, i) & MODE_UPASS)
2255 upass = MB_STRING(mbuf, i);
2256 else if (MB_TYPE(mbuf, i) & MODE_APASS)
2257 apass = MB_STRING(mbuf, i);
2258 else if (MB_TYPE(mbuf, i) & MODE_ALTCHAN)
2259 altchan = MB_STRING(mbuf, i);
2260 else if (MB_TYPE(mbuf, i) & MODE_NOFLOOD)
2261 noflood = MB_STRING(mbuf, i);
2268 buf[bufpos++] = '+'; /* start building buffer */
2270 for (flag_p = flags; flag_p[0]; flag_p += 2)
2272 buf[bufpos++] = flag_p[1];
2274 for (i = 0, len = bufpos; i < len; i++) {
2276 build_string(buf, &bufpos, key, 0, ' ');
2277 else if (buf[i] == 'l')
2278 build_string(buf, &bufpos, limitbuf, 0, ' ');
2279 else if (buf[i] == 'a')
2280 build_string(buf, &bufpos, accessbuf, 0, ' ');
2281 else if (buf[i] == 'U')
2282 build_string(buf, &bufpos, upass, 0, ' ');
2283 else if (buf[i] == 'A')
2284 build_string(buf, &bufpos, apass, 0, ' ');
2285 else if (buf[i] == 'F')
2286 build_string(buf, &bufpos, altchan, 0, ' ');
2287 else if (buf[i] == 'f')
2288 build_string(buf, &bufpos, noflood, 0, ' ');
2296 /** Simple function to invalidate a channel's ban cache.
2298 * This function marks all members of the channel as being neither
2299 * banned nor banned.
2301 * @param chan The channel to operate on.
2304 mode_ban_invalidate(struct Channel *chan)
2306 struct Membership *member;
2308 for (member = chan->members; member; member = member->next_member)
2309 ClearBanValid(member);
2312 /** Simple function to drop invite structures
2314 * Remove all the invites on the channel.
2316 * @param chan Channel to remove invites from.
2320 mode_invite_clear(struct Channel *chan)
2322 while (chan->invites)
2323 del_invite(chan->invites->value.cptr, chan);
2326 /* What we've done for mode_parse so far... */
2327 #define DONE_LIMIT 0x01 /**< We've set the limit */
2328 #define DONE_KEY_ADD 0x02 /**< We've set the key */
2329 #define DONE_BANLIST 0x04 /**< We've sent the ban list */
2330 #define DONE_NOTOPER 0x08 /**< We've sent a "Not oper" error */
2331 #define DONE_BANCLEAN 0x10 /**< We've cleaned bans... */
2332 #define DONE_UPASS_ADD 0x20 /**< We've set user pass */
2333 #define DONE_APASS_ADD 0x40 /**< We've set admin pass */
2334 #define DONE_KEY_DEL 0x80 /**< We've removed the key */
2335 #define DONE_UPASS_DEL 0x100 /**< We've removed the user pass */
2336 #define DONE_APASS_DEL 0x200 /**< We've removed the admin pass */
2337 #define DONE_ALTCHAN 0x800 /**< We've set the altchan */
2338 #define DONE_ACCESS 0x1000 /**< We've set the access */
2339 #define DONE_NOFLOOD 0x2000 /**< We've set the noflood options */
2342 struct ModeBuf *mbuf;
2343 struct Client *cptr;
2344 struct Client *sptr;
2345 struct Channel *chptr;
2346 struct Membership *member;
2357 struct Ban banlist[MAXPARA];
2360 unsigned short oplevel;
2361 struct Client *client;
2362 } cli_change[MAXPARA];
2365 /** Helper function to send "Not oper" or "Not member" messages
2366 * Here's a helper function to deal with sending along "Not oper" or
2367 * "Not member" messages
2369 * @param state Parsing State object
2372 send_notoper(struct ParseState *state)
2374 if (state->done & DONE_NOTOPER)
2377 send_reply(state->sptr, (state->flags & MODE_PARSE_NOTOPER) ?
2378 ERR_CHANOPRIVSNEEDED : ERR_NOTONCHANNEL, state->chptr->chname);
2380 state->done |= DONE_NOTOPER;
2384 * Helper function to convert limits
2386 * @param state Parsing state object.
2390 mode_parse_limit(struct ParseState *state, ulong64 *flag_p)
2392 unsigned int t_limit;
2394 if (state->dir == MODE_ADD) { /* convert arg only if adding limit */
2395 if (MyUser(state->sptr) && state->max_args <= 0) /* too many args? */
2398 if (state->parc <= 0) { /* warn if not enough args */
2399 if (MyUser(state->sptr))
2400 need_more_params(state->sptr, "MODE +l");
2404 t_limit = strtoul(state->parv[state->args_used++], 0, 10); /* grab arg */
2408 if ((int)t_limit<0) /* don't permit a negative limit */
2411 if (!(state->flags & MODE_PARSE_WIPEOUT) &&
2412 (!t_limit || t_limit == state->chptr->mode.limit))
2415 t_limit = state->chptr->mode.limit;
2417 /* If they're not an oper, they can't change modes */
2418 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2419 send_notoper(state);
2423 /* Can't remove a limit that's not there */
2424 if (state->dir == MODE_DEL && !state->chptr->mode.limit)
2427 /* Skip if this is a burst and a lower limit than this is set already */
2428 if ((state->flags & MODE_PARSE_BURST) &&
2429 (state->chptr->mode.mode & flag_p[0]) &&
2430 (state->chptr->mode.limit < t_limit))
2433 if (state->done & DONE_LIMIT) /* allow limit to be set only once */
2435 state->done |= DONE_LIMIT;
2440 modebuf_mode_uint(state->mbuf, state->dir | flag_p[0], t_limit);
2442 if (state->flags & MODE_PARSE_SET) { /* set the limit */
2443 if (state->dir & MODE_ADD) {
2444 state->chptr->mode.mode |= flag_p[0];
2445 state->chptr->mode.limit = t_limit;
2447 state->chptr->mode.mode &= ~flag_p[0];
2448 state->chptr->mode.limit = 0;
2455 mode_parse_access(struct ParseState *state, ulong64 *flag_p)
2457 unsigned int t_access;
2459 if (state->dir == MODE_ADD) { /* convert arg only if adding access */
2460 if (MyUser(state->sptr) && state->max_args <= 0) /* too many args? */
2463 if (state->parc <= 0) { /* warn if not enough args */
2464 if (MyUser(state->sptr))
2465 need_more_params(state->sptr, "MODE +a");
2469 t_access = strtoul(state->parv[state->args_used++], 0, 10); /* grab arg */
2473 if ((int)t_access<1 || (int)t_access>500) /* don't permit a negative access or an access over 500 */
2476 if (!feature_bool(FEAT_CHMODE_A_ENABLE)) { /* don't parse MODE_ACCESS if it's disabled */
2477 if (MyUser(state->sptr)) {
2479 send_reply(state->sptr, ERR_UNKNOWNMODE, mode[0]);
2484 if (!(state->flags & MODE_PARSE_WIPEOUT) &&
2485 (!t_access || t_access == state->chptr->mode.access))
2488 t_access = state->chptr->mode.access;
2490 /* If they're not an oper, they can't change modes */
2491 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2492 send_notoper(state);
2496 /* Can't remove an access that's not there */
2497 if (state->dir == MODE_DEL && !state->chptr->mode.access)
2500 /* Skip if this is a burst and a higher access than this is set already */
2501 if ((state->flags & MODE_PARSE_BURST) &&
2502 (state->chptr->mode.mode & flag_p[0]) &&
2503 (state->chptr->mode.access > t_access))
2506 if (state->done & DONE_ACCESS) /* allow access to be set only once */
2508 state->done |= DONE_ACCESS;
2513 modebuf_mode_uint(state->mbuf, state->dir | flag_p[0], t_access);
2515 if (state->flags & MODE_PARSE_SET) { /* set the access */
2516 if (state->dir & MODE_ADD) {
2517 state->chptr->mode.mode |= flag_p[0];
2518 state->chptr->mode.access = t_access;
2520 state->chptr->mode.mode &= ~flag_p[0];
2521 state->chptr->mode.access = 0;
2528 mode_parse_altchan(struct ParseState *state, ulong64 *flag_p)
2532 if (state->dir == MODE_ADD) { /* convert arg only if adding altchan */
2533 if (MyUser(state->sptr) && state->max_args <= 0) /* too many args? */
2536 if (!feature_bool(FEAT_CHMODE_F_ENABLE))
2539 if (state->parc <= 0) { /* warn if not enough args */
2540 if (MyUser(state->sptr))
2541 need_more_params(state->sptr, "MODE +F");
2545 t_str = state->parv[state->args_used++]; /* grab arg */
2549 if (!IsChannelName(t_str) || !strIsIrcCh(t_str) || strlen(t_str) > IRCD_MIN(CHANNELLEN, feature_int(FEAT_CHANNELLEN)) || t_str[0] == '&') /* only parse it if it's a valid channel name! */
2552 if(!(state->flags & MODE_PARSE_FORCE)) {
2553 struct Channel *chptr;
2554 struct Membership *member;
2555 if (!(chptr = FindChannel(t_str)))
2557 if(!(member = find_member_link(chptr, state->sptr)))
2559 if(!IsChanOp(member)) {
2560 send_notoper(state);
2565 if (!(state->flags & MODE_PARSE_WIPEOUT) &&
2566 (!t_str || t_str == state->chptr->mode.altchan))
2569 t_str = state->chptr->mode.altchan;
2571 /* If they're not an oper, they can't change modes */
2572 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2573 send_notoper(state);
2577 /* Can't remove a altchan that's not there */
2578 if (state->dir == MODE_DEL && !*state->chptr->mode.altchan)
2581 /* Skip if this is a burst and a lower altchan than this is set already */
2582 if ((state->flags & MODE_PARSE_BURST) &&
2583 *(state->chptr->mode.altchan))
2586 if (state->done & DONE_ALTCHAN) /* allow altchan to be set only once */
2588 state->done |= DONE_ALTCHAN;
2593 if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
2594 !ircd_strcmp(state->chptr->mode.altchan, t_str))
2595 return; /* no change */
2597 if (state->flags & MODE_PARSE_BOUNCE) {
2598 if (*state->chptr->mode.altchan) /* reset old altchan */
2599 modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0], state->chptr->mode.altchan, 0);
2600 else /* remove new bogus altchan */
2601 modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
2602 } else /* send new altchan */
2603 modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
2605 if (state->flags & MODE_PARSE_SET) {
2606 if (state->dir == MODE_DEL) { /* remove the old altchan */
2607 *state->chptr->mode.altchan = '\0';
2608 state->chptr->mode.mode &= ~flag_p[0];
2610 ircd_strncpy(state->chptr->mode.altchan, t_str, CHANNELLEN);
2611 state->chptr->mode.mode |= flag_p[0];
2617 mode_parse_noflood(struct ParseState *state, ulong64 *flag_p)
2621 unsigned int count = 0, time = 0, flags = 0;
2623 if (state->dir == MODE_ADD) { /* convert arg only if adding noflood */
2624 if (MyUser(state->sptr) && state->max_args <= 0) /* too many args? */
2627 if (state->parc <= 0) { /* warn if not enough args */
2628 if (MyUser(state->sptr))
2629 need_more_params(state->sptr, "MODE +f");
2633 t_str = state->parv[state->args_used++]; /* grab arg */
2640 if(state->flags & MODE_PARSE_FORCE) flags |= FLFL_NOFLOOD;
2641 else t_str++; //simply ignore if it's not an opmode
2644 if(tmp[0] == '+' || tmp[0] == '@') {
2645 if(tmp[0] == '+') flags |= FLFL_VOICE;
2646 if(tmp[0] == '@') flags |= FLFL_CHANOP;
2650 for(p = tmp; p[0]; p++) {
2652 char tmpchar = p[0];
2654 count = strtoul(tmp,0,10);
2657 time = strtoul(p,0,10);
2661 if(count <= 0 || time <= 0 || count > 100 || time > 600) return;
2663 if (!(state->flags & MODE_PARSE_WIPEOUT) &&
2664 (!t_str || t_str == state->chptr->mode.noflood))
2667 t_str = state->chptr->mode.noflood;
2669 /* If they're not an oper, they can't change modes */
2670 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2671 send_notoper(state);
2675 /* Can't remove a noflood that's not there */
2676 if (state->dir == MODE_DEL && !*state->chptr->mode.noflood)
2679 /* Skip if this is a burst and a lower noflood than this is set already */
2680 if ((state->flags & MODE_PARSE_BURST) &&
2681 *(state->chptr->mode.noflood))
2684 if (state->done & DONE_NOFLOOD) /* allow noflood to be set only once */
2686 state->done |= DONE_NOFLOOD;
2691 if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
2692 !ircd_strcmp(state->chptr->mode.noflood, t_str))
2693 return; /* no change */
2695 if (state->flags & MODE_PARSE_BOUNCE) {
2696 if (*state->chptr->mode.noflood) /* reset old noflood */
2697 modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0], state->chptr->mode.noflood, 0);
2698 else /* remove new bogus noflood */
2699 modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
2700 } else /* send new noflood */
2701 modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
2703 if (state->flags & MODE_PARSE_SET) {
2704 if (state->dir == MODE_DEL) { /* remove the old noflood */
2705 *state->chptr->mode.noflood = '\0';
2706 state->chptr->mode.mode &= ~flag_p[0];
2708 ircd_strncpy(state->chptr->mode.noflood, t_str, CHANNELLEN);
2709 state->chptr->mode.mode |= flag_p[0];
2713 if (state->dir == MODE_ADD) {
2714 unsigned int noflood_value = time;
2715 noflood_value <<= 10;
2716 noflood_value |= count;
2717 noflood_value <<= 3;
2718 noflood_value |= flags;
2719 state->chptr->mode.noflood_value = noflood_value;
2721 //removed the mode so free all flood objects
2722 state->chptr->mode.noflood_value = 0;
2723 struct Membership *member;
2724 for(member = state->chptr->members; member; member = member->next_member) {
2725 struct MemberFlood *floodnode;
2726 for(floodnode = member->flood;floodnode ; floodnode = floodnode->next_memberflood) {
2727 if(floodnode->next_memberflood == NULL) break;
2728 } //simply walk to the end
2729 if(!floodnode) continue;
2730 floodnode->next_memberflood = free_MemberFlood;
2731 free_MemberFlood = floodnode;
2732 member->flood = NULL;
2738 mode_parse_quarantine(struct ParseState *state, ulong64 *flag_p)
2743 /** Helper function to validate key-like parameters.
2745 * @param[in] state Parse state for feedback to user.
2746 * @param[in] s Key to validate.
2747 * @param[in] command String to pass for need_more_params() command.
2748 * @return Zero on an invalid key, non-zero if the key was okay.
2751 is_clean_key(struct ParseState *state, char *s, char *command)
2756 if (MyUser(state->sptr))
2757 need_more_params(state->sptr, command);
2760 else if (s[0] == ':') {
2761 if (MyUser(state->sptr))
2762 send_reply(state->sptr, ERR_INVALIDKEY, state->chptr->chname);
2765 for (ii = 0; (ii <= KEYLEN) && (s[ii] != '\0'); ++ii) {
2766 if ((unsigned char)s[ii] <= ' ' || s[ii] == ',') {
2767 if (MyUser(state->sptr))
2768 send_reply(state->sptr, ERR_INVALIDKEY, state->chptr->chname);
2773 if (MyUser(state->sptr))
2774 send_reply(state->sptr, ERR_INVALIDKEY, state->chptr->chname);
2781 * Helper function to convert keys
2784 mode_parse_key(struct ParseState *state, ulong64 *flag_p)
2788 if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
2791 if (state->parc <= 0) { /* warn if not enough args */
2792 if (MyUser(state->sptr))
2793 need_more_params(state->sptr, state->dir == MODE_ADD ? "MODE +k" :
2798 t_str = state->parv[state->args_used++]; /* grab arg */
2802 /* If they're not an oper, they can't change modes */
2803 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2804 send_notoper(state);
2808 /* allow removing and then adding key, but not adding and then removing */
2809 if (state->dir == MODE_ADD)
2811 if (state->done & DONE_KEY_ADD)
2813 state->done |= DONE_KEY_ADD;
2817 if (state->done & (DONE_KEY_ADD | DONE_KEY_DEL))
2819 state->done |= DONE_KEY_DEL;
2822 /* If the key is invalid, tell the user and bail. */
2823 if (!is_clean_key(state, t_str, state->dir == MODE_ADD ? "MODE +k" :
2830 /* Skip if this is a burst, we have a key already and the new key is
2831 * after the old one alphabetically */
2832 if ((state->flags & MODE_PARSE_BURST) &&
2833 *(state->chptr->mode.key) &&
2834 ircd_strcmp(state->chptr->mode.key, t_str) <= 0)
2837 /* can't add a key if one is set, nor can one remove the wrong key */
2838 if (!(state->flags & MODE_PARSE_FORCE))
2839 if ((state->dir == MODE_ADD && *state->chptr->mode.key) ||
2840 (state->dir == MODE_DEL &&
2841 ircd_strcmp(state->chptr->mode.key, t_str))) {
2842 send_reply(state->sptr, ERR_KEYSET, state->chptr->chname);
2846 if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
2847 !ircd_strcmp(state->chptr->mode.key, t_str))
2848 return; /* no key change */
2850 if (state->flags & MODE_PARSE_BOUNCE) {
2851 if (*state->chptr->mode.key) /* reset old key */
2852 modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0],
2853 state->chptr->mode.key, 0);
2854 else /* remove new bogus key */
2855 modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
2856 } else /* send new key */
2857 modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
2859 if (state->flags & MODE_PARSE_SET) {
2860 if (state->dir == MODE_DEL) /* remove the old key */
2861 *state->chptr->mode.key = '\0';
2863 ircd_strncpy(state->chptr->mode.key, t_str, KEYLEN);
2868 * Helper function to convert user passes
2871 mode_parse_upass(struct ParseState *state, ulong64 *flag_p)
2875 if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
2878 if (state->parc <= 0) { /* warn if not enough args */
2879 if (MyUser(state->sptr))
2880 need_more_params(state->sptr, state->dir == MODE_ADD ? "MODE +U" :
2885 t_str = state->parv[state->args_used++]; /* grab arg */
2889 /* If they're not an oper, they can't change modes */
2890 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2891 send_notoper(state);
2895 /* If a non-service user is trying to force it, refuse. */
2896 if (state->flags & MODE_PARSE_FORCE && MyUser(state->sptr)
2897 && !HasPriv(state->sptr, PRIV_APASS_OPMODE)) {
2898 send_reply(state->sptr, ERR_NOTMANAGER, state->chptr->chname,
2899 state->chptr->chname);
2903 /* If they are not the channel manager, they are not allowed to change it */
2904 if (MyUser(state->sptr) && !(state->flags & MODE_PARSE_FORCE || IsChannelManager(state->member))) {
2905 if (*state->chptr->mode.apass) {
2906 send_reply(state->sptr, ERR_NOTMANAGER, state->chptr->chname,
2907 state->chptr->chname);
2909 send_reply(state->sptr, ERR_NOMANAGER, state->chptr->chname,
2910 (TStime() - state->chptr->creationtime < 172800) ?
2911 "approximately 4-5 minutes" : "approximately 48 hours");
2916 /* allow removing and then adding upass, but not adding and then removing */
2917 if (state->dir == MODE_ADD)
2919 if (state->done & DONE_UPASS_ADD)
2921 state->done |= DONE_UPASS_ADD;
2925 if (state->done & (DONE_UPASS_ADD | DONE_UPASS_DEL))
2927 state->done |= DONE_UPASS_DEL;
2930 /* If the Upass is invalid, tell the user and bail. */
2931 if (!is_clean_key(state, t_str, state->dir == MODE_ADD ? "MODE +U" :
2938 if (!(state->flags & MODE_PARSE_FORCE)) {
2939 /* can't add the upass while apass is not set */
2940 if (state->dir == MODE_ADD && !*state->chptr->mode.apass) {
2941 send_reply(state->sptr, ERR_UPASSNOTSET, state->chptr->chname, state->chptr->chname);
2944 /* cannot set a +U password that is the same as +A */
2945 if (state->dir == MODE_ADD && !ircd_strcmp(state->chptr->mode.apass, t_str)) {
2946 send_reply(state->sptr, ERR_UPASS_SAME_APASS, state->chptr->chname);
2949 /* can't add a upass if one is set, nor can one remove the wrong upass */
2950 if ((state->dir == MODE_ADD && *state->chptr->mode.upass) ||
2951 (state->dir == MODE_DEL &&
2952 ircd_strcmp(state->chptr->mode.upass, t_str))) {
2953 send_reply(state->sptr, ERR_KEYSET, state->chptr->chname);
2958 if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
2959 !ircd_strcmp(state->chptr->mode.upass, t_str))
2960 return; /* no upass change */
2962 /* Skip if this is a burst, we have a Upass already and the new Upass is
2963 * after the old one alphabetically */
2964 if ((state->flags & MODE_PARSE_BURST) &&
2965 *(state->chptr->mode.upass) &&
2966 ircd_strcmp(state->chptr->mode.upass, t_str) <= 0)
2969 if (state->flags & MODE_PARSE_BOUNCE) {
2970 if (*state->chptr->mode.upass) /* reset old upass */
2971 modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0],
2972 state->chptr->mode.upass, 0);
2973 else /* remove new bogus upass */
2974 modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
2975 } else /* send new upass */
2976 modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
2978 if (state->flags & MODE_PARSE_SET) {
2979 if (state->dir == MODE_DEL) /* remove the old upass */
2980 *state->chptr->mode.upass = '\0';
2982 ircd_strncpy(state->chptr->mode.upass, t_str, KEYLEN);
2987 * Helper function to convert admin passes
2990 mode_parse_apass(struct ParseState *state, ulong64 *flag_p)
2992 struct Membership *memb;
2995 if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
2998 if (state->parc <= 0) { /* warn if not enough args */
2999 if (MyUser(state->sptr))
3000 need_more_params(state->sptr, state->dir == MODE_ADD ? "MODE +A" :
3005 t_str = state->parv[state->args_used++]; /* grab arg */
3009 /* If they're not an oper, they can't change modes */
3010 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
3011 send_notoper(state);
3015 if (MyUser(state->sptr)) {
3016 if (state->flags & MODE_PARSE_FORCE) {
3017 /* If an unprivileged oper is trying to force it, refuse. */
3018 if (!HasPriv(state->sptr, PRIV_APASS_OPMODE)) {
3019 send_reply(state->sptr, ERR_NOTMANAGER, state->chptr->chname,
3020 state->chptr->chname);
3024 /* If they are not the channel manager, they are not allowed to change it. */
3025 if (!IsChannelManager(state->member)) {
3026 if (*state->chptr->mode.apass) {
3027 send_reply(state->sptr, ERR_NOTMANAGER, state->chptr->chname,
3028 state->chptr->chname);
3030 send_reply(state->sptr, ERR_NOMANAGER, state->chptr->chname,
3031 (TStime() - state->chptr->creationtime < 172800) ?
3032 "approximately 4-5 minutes" : "approximately 48 hours");
3036 /* Can't remove the Apass while Upass is still set. */
3037 if (state->dir == MODE_DEL && *state->chptr->mode.upass) {
3038 send_reply(state->sptr, ERR_UPASSSET, state->chptr->chname, state->chptr->chname);
3041 /* Can't add an Apass if one is set, nor can one remove the wrong Apass. */
3042 if ((state->dir == MODE_ADD && *state->chptr->mode.apass) ||
3043 (state->dir == MODE_DEL && ircd_strcmp(state->chptr->mode.apass, t_str))) {
3044 send_reply(state->sptr, ERR_KEYSET, state->chptr->chname);
3049 /* Forbid removing the Apass if the channel is older than 48 hours
3050 * unless an oper is doing it. */
3051 if (TStime() - state->chptr->creationtime >= 172800
3052 && state->dir == MODE_DEL
3053 && !IsAnOper(state->sptr)) {
3054 send_reply(state->sptr, ERR_CHANSECURED, state->chptr->chname);
3059 /* allow removing and then adding apass, but not adding and then removing */
3060 if (state->dir == MODE_ADD)
3062 if (state->done & DONE_APASS_ADD)
3064 state->done |= DONE_APASS_ADD;
3068 if (state->done & (DONE_APASS_ADD | DONE_APASS_DEL))
3070 state->done |= DONE_APASS_DEL;
3073 /* If the Apass is invalid, tell the user and bail. */
3074 if (!is_clean_key(state, t_str, state->dir == MODE_ADD ? "MODE +A" :
3081 if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
3082 !ircd_strcmp(state->chptr->mode.apass, t_str))
3083 return; /* no apass change */
3085 /* Skip if this is a burst, we have an Apass already and the new Apass is
3086 * after the old one alphabetically */
3087 if ((state->flags & MODE_PARSE_BURST) &&
3088 *(state->chptr->mode.apass) &&
3089 ircd_strcmp(state->chptr->mode.apass, t_str) <= 0)
3092 if (state->flags & MODE_PARSE_BOUNCE) {
3093 if (*state->chptr->mode.apass) /* reset old apass */
3094 modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0],
3095 state->chptr->mode.apass, 0);
3096 else /* remove new bogus apass */
3097 modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
3098 } else /* send new apass */
3099 modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
3101 if (state->flags & MODE_PARSE_SET) {
3102 if (state->dir == MODE_ADD) { /* set the new apass */
3103 /* Only accept the new apass if there is no current apass or
3104 * this is a BURST. */
3105 if (state->chptr->mode.apass[0] == '\0' ||
3106 (state->flags & MODE_PARSE_BURST))
3107 ircd_strncpy(state->chptr->mode.apass, t_str, KEYLEN);
3108 /* Make it VERY clear to the user that this is a one-time password */
3109 if (MyUser(state->sptr)) {
3110 send_reply(state->sptr, RPL_APASSWARN_SET, state->chptr->mode.apass);
3111 send_reply(state->sptr, RPL_APASSWARN_SECRET, state->chptr->chname,
3112 state->chptr->mode.apass);
3114 /* Give the channel manager level 0 ops.
3115 There should not be tested for IsChannelManager here because
3116 on the local server it is impossible to set the apass if one
3117 isn't a channel manager and remote servers might need to sync
3118 the oplevel here: when someone creates a channel (and becomes
3119 channel manager) during a net.break, and only sets the Apass
3120 after the net rejoined, they will have oplevel MAXOPLEVEL on
3121 all remote servers. */
3123 SetOpLevel(state->member, 0);
3124 } else { /* remove the old apass */
3125 *state->chptr->mode.apass = '\0';
3126 /* Clear Upass so that there is never a Upass set when a zannel is burst. */
3127 *state->chptr->mode.upass = '\0';
3128 if (MyUser(state->sptr))
3129 send_reply(state->sptr, RPL_APASSWARN_CLEAR);
3130 /* Revert everyone to MAXOPLEVEL. */
3131 for (memb = state->chptr->members; memb; memb = memb->next_member) {
3132 if (memb->status & MODE_CHANOP)
3133 SetOpLevel(memb, MAXOPLEVEL);
3139 /** Compare one ban's extent to another.
3140 * This works very similarly to mmatch() but it knows about CIDR masks
3141 * and ban exceptions. If both bans are CIDR-based, compare their
3142 * address bits; otherwise, use mmatch().
3143 * @param[in] old_ban One ban.
3144 * @param[in] new_ban Another ban.
3145 * @return Zero if \a old_ban is a superset of \a new_ban, non-zero otherwise.
3148 bmatch(struct Ban *old_ban, struct Ban *new_ban)
3151 assert(old_ban != NULL);
3152 assert(new_ban != NULL);
3153 /* A ban is never treated as a superset of an exception and vice versa. */
3154 if(((old_ban->flags & BAN_EXCEPTION) && !(new_ban->flags & BAN_EXCEPTION))
3155 || (!(old_ban->flags & BAN_EXCEPTION) && (new_ban->flags & BAN_EXCEPTION)))
3157 /* If either is not an address mask, match the text masks. */
3158 if ((old_ban->flags & new_ban->flags & BAN_IPMASK) == 0)
3159 return mmatch(old_ban->banstr, new_ban->banstr);
3160 /* If the old ban has a longer prefix than new, it cannot be a superset. */
3161 if (old_ban->addrbits > new_ban->addrbits)
3163 /* Compare the masks before the hostname part. */
3164 old_ban->banstr[old_ban->nu_len] = new_ban->banstr[new_ban->nu_len] = '\0';
3165 res = mmatch(old_ban->banstr, new_ban->banstr);
3166 old_ban->banstr[old_ban->nu_len] = new_ban->banstr[new_ban->nu_len] = '@';
3169 /* If the old ban's mask mismatches, cannot be a superset. */
3170 if (!ipmask_check(&new_ban->address, &old_ban->address, old_ban->addrbits))
3172 /* Otherwise it depends on whether the old ban's text is a superset
3174 return mmatch(old_ban->banstr, new_ban->banstr);
3177 /** Add a ban from a ban list and mark bans that should be removed
3178 * because they overlap.
3180 * There are three invariants for a ban list. First, no ban may be
3181 * more specific than another ban. Second, no exception may be more
3182 * specific than another exception. Finally, no ban may be more
3183 * specific than any exception.
3185 * @param[in,out] banlist Pointer to head of list.
3186 * @param[in] newban Ban (or exception) to add (or remove).
3187 * @param[in] do_free If non-zero, free \a newban on failure.
3188 * @return Zero if \a newban could be applied, non-zero if not.
3190 int apply_ban(struct Ban **banlist, struct Ban *newban, int do_free)
3195 assert(newban->flags & (BAN_ADD|BAN_DEL));
3196 if (newban->flags & BAN_ADD) {
3198 /* If a less specific *active* entry is found, fail. */
3199 for (ban = *banlist; ban; ban = ban->next) {
3200 if (!bmatch(ban, newban) && !(ban->flags & BAN_DEL)) {
3205 if (!(ban->flags & (BAN_OVERLAPPED|BAN_DEL))) {
3207 totlen += strlen(ban->banstr);
3210 /* Mark more specific entries and add this one to the end of the list. */
3211 while ((ban = *banlist) != NULL) {
3212 if (!bmatch(newban, ban)) {
3213 ban->flags |= BAN_OVERLAPPED | BAN_DEL;
3215 banlist = &ban->next;
3219 } else if (newban->flags & BAN_DEL) {
3220 size_t remove_count = 0;
3221 /* Mark more specific entries. */
3222 for (ban = *banlist; ban; ban = ban->next) {
3223 if (!bmatch(newban, ban)) {
3224 ban->flags |= BAN_OVERLAPPED | BAN_DEL;
3230 /* If no matches were found, fail. */
3240 /* Removes MODE_WASDELJOINS in a channel.
3241 * Reveals all hidden users.
3243 static void reveal_hidden_chan_users(struct ParseState *state, ulong64 *flag_p) {
3244 struct Membership *member;
3246 /* If the channel is not +d, do nothing. */
3247 if(!(state->chptr->mode.mode & MODE_WASDELJOINS)) return;
3249 /* Iterate through all members and reveal them if they are hidden. */
3250 for(member = state->chptr->members; member; member = member->next_member) {
3251 if(IsDelayedJoin(member) && !IsInvisibleJoin(member)) {
3252 RevealDelayedJoin(member);
3257 /* Handle MODE_AUDITORIUM changes
3258 * set Delayed for all hidden users on MODE_DEL
3259 * part all nonoped users on MODE_ADD
3261 static void audit_chan_users(struct ParseState *state, ulong64 *flag_p) {
3262 struct Membership *member;
3263 if (state->dir == MODE_ADD) {
3264 for(member = state->chptr->members; member; member = member->next_member) {
3265 if(!IsChanOp(member) && !HasVoice(member)) {
3266 sendcmdto_channel_butserv_butone(member->user, CMD_PART, member->channel, member->user, SKIP_OPS, "%H :%s", member->channel, "mode +u set.");
3270 for(member = state->chptr->members; member; member = member->next_member) {
3271 if(!IsChanOp(member) && !HasVoice(member)) {
3272 sendcmdto_channel_butserv_butone(member->user, CMD_JOIN, member->channel, member->user, SKIP_OPS, ":%H", member->channel);
3280 * Helper function to convert bans
3283 mode_parse_ban(struct ParseState *state, ulong64 *flag_p)
3286 struct Ban *ban, *newban;
3288 if (state->parc <= 0) { /* Not enough args, send ban list */
3289 if (MyUser(state->sptr) && !(state->done & DONE_BANLIST)) {
3290 send_ban_list(state->sptr, state->chptr);
3291 state->done |= DONE_BANLIST;
3296 if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
3299 t_str = state->parv[state->args_used++]; /* grab arg */
3303 /* If they're not an oper, they can't change modes */
3304 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
3305 send_notoper(state);
3309 if ((s = strchr(t_str, ' ')))
3312 if (!*t_str || *t_str == ':') { /* warn if empty */
3313 if (MyUser(state->sptr))
3314 need_more_params(state->sptr, state->dir == MODE_ADD ? "MODE +b" :
3319 /* Clear all ADD/DEL/OVERLAPPED flags from ban list. */
3320 if (!(state->done & DONE_BANCLEAN)) {
3321 for (ban = state->chptr->banlist; ban; ban = ban->next)
3322 ban->flags &= ~(BAN_ADD | BAN_DEL | BAN_OVERLAPPED);
3323 state->done |= DONE_BANCLEAN;
3326 /* remember the ban for the moment... */
3327 newban = state->banlist + (state->numbans++);
3329 newban->flags = ((state->dir == MODE_ADD) ? BAN_ADD : BAN_DEL)
3330 | (*flag_p == MODE_BAN ? 0 : BAN_EXCEPTION);
3331 set_ban_mask(newban, collapse(pretty_mask(t_str)));
3332 ircd_strncpy(newban->who, IsUser(state->sptr) ? cli_name(state->sptr) : "*", NICKLEN);
3333 newban->when = TStime();
3334 apply_ban(&state->chptr->banlist, newban, 0);
3338 * This is the bottom half of the ban processor
3341 mode_process_bans(struct ParseState *state)
3343 struct Ban *ban, *newban, *prevban, *nextban;
3349 for (prevban = 0, ban = state->chptr->banlist; ban; ban = nextban) {
3351 banlen = strlen(ban->banstr);
3353 nextban = ban->next;
3355 if ((ban->flags & (BAN_DEL | BAN_ADD)) == (BAN_DEL | BAN_ADD)) {
3357 prevban->next = 0; /* Break the list; ban isn't a real ban */
3359 state->chptr->banlist = 0;
3365 } else if (ban->flags & BAN_DEL) { /* Deleted a ban? */
3367 DupString(bandup, ban->banstr);
3368 modebuf_mode_string(state->mbuf, MODE_DEL | MODE_BAN, bandup, 1);
3370 if (state->flags & MODE_PARSE_SET) { /* Ok, make it take effect */
3371 if (prevban) /* clip it out of the list... */
3372 prevban->next = ban->next;
3374 state->chptr->banlist = ban->next;
3381 continue; /* next ban; keep prevban like it is */
3383 ban->flags &= BAN_IPMASK; /* unset other flags */
3384 } else if (ban->flags & BAN_ADD) { /* adding a ban? */
3386 prevban->next = 0; /* Break the list; ban isn't a real ban */
3388 state->chptr->banlist = 0;
3390 /* If we're supposed to ignore it, do so. */
3391 if (ban->flags & BAN_OVERLAPPED &&
3392 !(state->flags & MODE_PARSE_BOUNCE)) {
3396 if (state->flags & MODE_PARSE_SET && MyUser(state->sptr) &&
3397 (len > (feature_int(FEAT_AVBANLEN) * feature_int(FEAT_MAXBANS)) ||
3398 count > feature_int(FEAT_MAXBANS))) {
3399 send_reply(state->sptr, ERR_BANLISTFULL, state->chptr->chname,
3405 /* add the ban to the buffer */
3406 DupString(bandup, ban->banstr);
3407 modebuf_mode_string(state->mbuf, MODE_ADD | MODE_BAN, bandup, 1);
3409 if (state->flags & MODE_PARSE_SET) { /* create a new ban */
3410 newban = make_ban(ban->banstr);
3411 strcpy(newban->who, ban->who);
3412 newban->when = ban->when;
3413 newban->flags = ban->flags & BAN_IPMASK;
3415 newban->next = state->chptr->banlist; /* and link it in */
3416 state->chptr->banlist = newban;
3425 } /* for (prevban = 0, ban = state->chptr->banlist; ban; ban = nextban) { */
3427 if (changed) /* if we changed the ban list, we must invalidate the bans */
3428 mode_ban_invalidate(state->chptr);
3432 * Helper function to process client changes
3435 mode_parse_client(struct ParseState *state, ulong64 *flag_p)
3439 struct Client *acptr;
3440 struct Membership *member;
3441 int oplevel = MAXOPLEVEL + 1;
3445 if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
3448 if (state->parc <= 0) /* return if not enough args */
3451 t_str = state->parv[state->args_used++]; /* grab arg */
3455 /* If they're not an oper, they can't change modes */
3456 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
3457 send_notoper(state);
3461 if (MyUser(state->sptr)) {
3462 colon = strchr(t_str, ':');
3463 if (colon != NULL) {
3465 req_oplevel = atoi(colon);
3466 if (*flag_p == CHFL_VOICE || state->dir == MODE_DEL) {
3467 /* Ignore the colon and its argument. */
3468 } else if (!(state->flags & MODE_PARSE_FORCE)
3470 && (req_oplevel < OpLevel(state->member)
3471 || (req_oplevel == OpLevel(state->member)
3472 && OpLevel(state->member) < MAXOPLEVEL)
3473 || req_oplevel > MAXOPLEVEL)) {
3474 send_reply(state->sptr, ERR_NOTLOWEROPLEVEL,
3475 t_str, state->chptr->chname,
3476 OpLevel(state->member), req_oplevel, "op",
3477 OpLevel(state->member) == req_oplevel ? "the same" : "a higher");
3478 } else if (req_oplevel <= MAXOPLEVEL)
3479 oplevel = req_oplevel;
3481 /* find client we're manipulating */
3482 acptr = find_chasing(state->sptr, t_str, NULL);
3484 if (t_str[5] == ':') {
3486 oplevel = atoi(t_str + 6);
3488 acptr = findNUser(t_str);
3492 return; /* find_chasing() already reported an error to the user */
3494 for (i = 0; i < MAXPARA; i++) /* find an element to stick them in */
3495 if (!state->cli_change[i].flag || (state->cli_change[i].client == acptr &&
3496 state->cli_change[i].flag & flag_p[0]))
3497 break; /* found a slot */
3499 /* If we are going to bounce this deop, mark the correct oplevel. */
3500 if (state->flags & MODE_PARSE_BOUNCE
3501 && state->dir == MODE_DEL
3502 && flag_p[0] == MODE_CHANOP
3503 && (member = find_member_link(state->chptr, acptr)))
3504 oplevel = OpLevel(member);
3506 /* Store what we're doing to them */
3507 state->cli_change[i].flag = state->dir | flag_p[0];
3508 state->cli_change[i].oplevel = oplevel;
3509 state->cli_change[i].client = acptr;
3513 * Helper function to process the changed client list
3516 mode_process_clients(struct ParseState *state)
3519 struct Membership *member;
3521 for (i = 0; state->cli_change[i].flag; i++) {
3522 assert(0 != state->cli_change[i].client);
3524 /* look up member link */
3525 if (!(member = find_member_link(state->chptr,
3526 state->cli_change[i].client)) ||
3527 (MyUser(state->sptr) && IsZombie(member))) {
3528 if (MyUser(state->sptr))
3529 send_reply(state->sptr, ERR_USERNOTINCHANNEL,
3530 cli_name(state->cli_change[i].client),
3531 state->chptr->chname);
3534 if (member && (IsInvisibleJoin(member) && state->cli_change[i].client != state->sptr) && IsDelayedJoin(member)) {
3535 if (MyUser(state->sptr))
3536 send_reply(state->sptr, ERR_USERNOTINCHANNEL,
3537 cli_name(state->cli_change[i].client),
3538 state->chptr->chname);
3542 if ((state->cli_change[i].flag & MODE_ADD &&
3543 (state->cli_change[i].flag & member->status)) ||
3544 (state->cli_change[i].flag & MODE_DEL &&
3545 !(state->cli_change[i].flag & member->status)))
3546 continue; /* no change made, don't do anything */
3548 /* see if the deop is allowed */
3549 if ((state->cli_change[i].flag & (MODE_DEL | MODE_CHANOP)) ==
3550 (MODE_DEL | MODE_CHANOP)) {
3551 /* Prevent +k users from being deopped, but allow extra ops to deop
3552 * +k users. We do not prevent deopping _REAL_ services because /opmode
3553 * will always allow this.
3555 if(IsChannelService(state->cli_change[i].client) && !IsXtraOp(state->sptr) && state->sptr != state->cli_change[i].client) {
3556 if (state->flags & MODE_PARSE_FORCE) /* it was forced */
3557 sendto_opmask_butone(0, SNO_HACK4, "Deop of +k user on %H by %s",
3559 (IsServer(state->sptr) ? cli_name(state->sptr) :
3560 cli_name((cli_user(state->sptr))->server)));
3562 else if (MyUser(state->sptr) && state->flags & MODE_PARSE_SET) {
3563 send_reply(state->sptr, ERR_ISCHANSERVICE,
3564 cli_name(state->cli_change[i].client),
3565 state->chptr->chname);
3570 /* check deop for local user */
3571 if (MyUser(state->sptr)) {
3573 /* don't allow local opers to be deopped on local channels */
3574 if (state->cli_change[i].client != state->sptr &&
3575 IsLocalChannel(state->chptr->chname) &&
3576 HasPriv(state->cli_change[i].client, PRIV_DEOP_LCHAN)) {
3577 send_reply(state->sptr, ERR_ISOPERLCHAN,
3578 cli_name(state->cli_change[i].client),
3579 state->chptr->chname);
3583 /* Forbid deopping other members with an oplevel less than
3584 * one's own level, and other members with an oplevel the same
3585 * as one's own unless both are at MAXOPLEVEL. */
3586 if (state->sptr != state->cli_change[i].client
3588 && ((OpLevel(member) < OpLevel(state->member))
3589 || (OpLevel(member) == OpLevel(state->member)
3590 && OpLevel(member) < MAXOPLEVEL))) {
3591 int equal = (OpLevel(member) == OpLevel(state->member));
3592 send_reply(state->sptr, ERR_NOTLOWEROPLEVEL,
3593 cli_name(state->cli_change[i].client),
3594 state->chptr->chname,
3595 OpLevel(state->member), OpLevel(member),
3596 "deop", equal ? "the same" : "a higher");
3602 /* set op-level of member being opped */
3603 if ((state->cli_change[i].flag & (MODE_ADD | MODE_CHANOP)) ==
3604 (MODE_ADD | MODE_CHANOP)) {
3605 /* If a valid oplevel was specified, use it.
3606 * Otherwise, if being opped by an outsider, get MAXOPLEVEL.
3607 * Otherwise, if not an apass channel, or state->member has
3608 * MAXOPLEVEL, get oplevel MAXOPLEVEL.
3609 * Otherwise, get state->member's oplevel+1.
3611 if (state->cli_change[i].oplevel <= MAXOPLEVEL)
3612 SetOpLevel(member, state->cli_change[i].oplevel);
3613 else if (!state->member)
3614 SetOpLevel(member, MAXOPLEVEL);
3615 else if (OpLevel(state->member) >= MAXOPLEVEL)
3616 SetOpLevel(member, OpLevel(state->member));
3618 SetOpLevel(member, OpLevel(state->member) + 1);
3621 int user_visible = (member->status & CHFL_VOICED_OR_OPPED);
3623 /* actually effect the change */
3624 if (state->flags & MODE_PARSE_SET) {
3625 if (state->cli_change[i].flag & MODE_ADD) {
3626 if (IsDelayedJoin(member) && !IsZombie(member))
3627 RevealDelayedJoin(member);
3628 member->status |= (state->cli_change[i].flag &
3629 (MODE_CHANOP | MODE_VOICE));
3630 if (state->cli_change[i].flag & MODE_CHANOP)
3631 ClearDeopped(member);
3633 member->status &= ~(state->cli_change[i].flag &
3634 (MODE_CHANOP | MODE_VOICE));
3637 /* accumulate the change */
3638 modebuf_mode_client(state->mbuf, state->cli_change[i].flag,
3639 state->cli_change[i].client,
3640 state->cli_change[i].oplevel);
3642 if((member->channel->mode.mode & MODE_AUDITORIUM)) {
3643 //join or part the user
3644 if((member->status & CHFL_VOICED_OR_OPPED) && !user_visible) {
3645 sendcmdto_channel_butserv_butone(member->user, CMD_JOIN, member->channel, member->user, SKIP_OPS, ":%H", member->channel);
3646 } else if(!(member->status & CHFL_VOICED_OR_OPPED) && user_visible) {
3647 sendcmdto_channel_butserv_butone(member->user, CMD_PART, member->channel, member->user, SKIP_OPS, "%H :%s", member->channel, "user deoped/devoiced on a +u channel.");
3649 if(MyUser(member->user) && (state->cli_change[i].flag & MODE_CHANOP)) {
3650 //do_names(member->user, member->channel, NAMES_ALL|NAMES_EON|((member->status & MODE_CHANOP) ? 0 : NAMES_OPS));
3651 //this is not working for all users :( so we have to send join/part events
3652 struct Membership *member2;
3653 if (state->cli_change[i].flag & MODE_ADD) {
3655 for(member2 = state->chptr->members; member2; member2 = member2->next_member) {
3656 if(!IsChanOp(member2) && !HasVoice(member2)) {
3657 sendcmdto_one(member2->user, CMD_JOIN, member->user, ":%H", member->channel);
3662 for(member2 = state->chptr->members; member2; member2 = member2->next_member) {
3663 if(!IsChanOp(member2) && !HasVoice(member2) && member != member2) {
3664 sendcmdto_one(member2->user, CMD_PART, member->user, "%H :%s", member->channel, "invisible user on +u channel.");
3670 } /* for (i = 0; state->cli_change[i].flags; i++) */
3674 * Helper function to process the simple modes
3677 mode_parse_mode(struct ParseState *state, ulong64 *flag_p)
3679 /* If they're not an oper, they can't change modes */
3680 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
3681 send_notoper(state);
3688 /* Local users are not permitted to change registration status */
3689 if (flag_p[0] == MODE_REGISTERED && !(state->flags & MODE_PARSE_FORCE) && MyUser(state->sptr))
3692 if(flag_p[0] == MODE_AUDITORIUM)
3693 audit_chan_users(state, flag_p);
3695 if (state->dir == MODE_ADD) {
3696 state->add |= flag_p[0];
3697 state->del &= ~flag_p[0];
3699 if (flag_p[0] & MODE_SECRET) {
3700 state->add &= ~MODE_PRIVATE;
3701 state->del |= MODE_PRIVATE;
3702 } else if (flag_p[0] & MODE_PRIVATE) {
3703 state->add &= ~MODE_SECRET;
3704 state->del |= MODE_SECRET;
3707 state->add &= ~flag_p[0];
3708 state->del |= flag_p[0];
3711 assert(0 == (state->add & state->del));
3712 assert((MODE_SECRET | MODE_PRIVATE) !=
3713 (state->add & (MODE_SECRET | MODE_PRIVATE)));
3717 * This routine is intended to parse MODE or OPMODE commands and effect the
3718 * changes (or just build the bounce buffer).
3720 * \param[out] mbuf Receives parsed representation of mode change.
3721 * \param[in] cptr Connection that sent the message to this server.
3722 * \param[in] sptr Original source of the message.
3723 * \param[in] chptr Channel whose modes are being changed.
3724 * \param[in] parc Number of valid strings in \a parv.
3725 * \param[in] parv Text arguments representing mode change, with the
3726 * zero'th element containing a string like "+m" or "-o".
3727 * \param[in] flags Set of bitwise MODE_PARSE_* flags.
3728 * \param[in] member If non-null, the channel member attempting to change the modes.
3731 mode_parse(struct ModeBuf *mbuf, struct Client *cptr, struct Client *sptr,
3732 struct Channel *chptr, int parc, char *parv[], unsigned int flags,
3733 struct Membership* member)
3735 static ulong64 chan_flags[] = {
3740 MODE_MODERATED, 'm',
3741 MODE_TOPICLIMIT, 't',
3742 MODE_INVITEONLY, 'i',
3743 MODE_NOPRIVMSGS, 'n',
3747 MODE_REGISTERED, 'R',
3752 MODE_WASDELJOINS, 'd',
3758 MODE_QUARANTINE, 'Q',
3761 MODE_AUDITORIUM, 'u',
3771 struct ParseState state;
3782 state.chptr = chptr;
3783 state.member = member;
3786 state.flags = flags;
3787 state.dir = MODE_ADD;
3791 state.args_used = 0;
3792 state.max_args = MAXMODEPARAMS;
3795 for (i = 0; i < MAXPARA; i++) { /* initialize ops/voices arrays */
3796 state.banlist[i].next = 0;
3797 state.banlist[i].who[0] = '\0';
3798 state.banlist[i].when = 0;
3799 state.banlist[i].flags = 0;
3800 state.cli_change[i].flag = 0;
3801 state.cli_change[i].client = 0;
3804 modestr = state.parv[state.args_used++];
3808 for (; *modestr; modestr++) {
3809 for (flag_p = chan_flags; flag_p[0]; flag_p += 2) /* look up flag */
3810 if (flag_p[1] == *modestr)
3813 if (!flag_p[0]) { /* didn't find it? complain and continue */
3814 if (MyUser(state.sptr))
3815 send_reply(state.sptr, ERR_UNKNOWNMODE, *modestr);
3820 case '+': /* switch direction to MODE_ADD */
3821 case '-': /* switch direction to MODE_DEL */
3822 state.dir = flag_p[0];
3825 case 'l': /* deal with limits */
3826 mode_parse_limit(&state, flag_p);
3828 case 'a': /* deal with limits */
3829 mode_parse_access(&state, flag_p);
3832 mode_parse_altchan(&state, flag_p);
3835 mode_parse_noflood(&state, flag_p);
3838 if(IsNetServ(state.sptr) && IsSecurityServ(state.sptr))
3839 mode_parse_mode(&state, flag_p);
3841 case 'k': /* deal with keys */
3842 mode_parse_key(&state, flag_p);
3844 case 'A': /* deal with Admin passes */
3845 if (IsServer(cptr) || feature_bool(FEAT_OPLEVELS))
3846 mode_parse_apass(&state, flag_p);
3848 case 'U': /* deal with user passes */
3849 if (IsServer(cptr) || feature_bool(FEAT_OPLEVELS))
3850 mode_parse_upass(&state, flag_p);
3852 case 'b': /* deal with bans */
3853 mode_parse_ban(&state, flag_p);
3856 case 'd': /* deal with hidden members */
3857 reveal_hidden_chan_users(&state, flag_p);
3860 case 'o': /* deal with ops/voice */
3862 mode_parse_client(&state, flag_p);
3865 case 'z': /* remote clients are allowed to change +z */
3866 if(!MyUser(state.sptr) || (state.flags & MODE_PARSE_FORCE))
3867 mode_parse_mode(&state, flag_p);
3869 case 'O': /* remote clients are allowed to change +z */
3870 //struct User* user = cli_user(cptr);
3871 //|| (chptr.chanowner && IsAccount(cptr) && chptr.chanowner == user->account)
3872 if(!MyUser(state.sptr) || (state.flags & MODE_PARSE_FORCE) )
3873 mode_parse_mode(&state, flag_p);
3876 default: /* deal with other modes */
3877 mode_parse_mode(&state, flag_p);
3879 } /* switch (*modestr) */
3880 } /* for (; *modestr; modestr++) */
3882 if (state.flags & MODE_PARSE_BURST)
3883 break; /* don't interpret any more arguments */
3885 if (state.parc > 0) { /* process next argument in string */
3886 modestr = state.parv[state.args_used++];
3890 if (IsServer(state.cptr) && !state.parc && IsDigit(*modestr)) {
3893 if (!(state.flags & MODE_PARSE_SET)) /* don't set earlier TS if */
3894 break; /* we're then going to bounce the mode! */
3896 recv_ts = atoi(modestr);
3898 if (recv_ts && recv_ts < state.chptr->creationtime)
3899 state.chptr->creationtime = recv_ts; /* respect earlier TS */
3900 else if (recv_ts > state.chptr->creationtime) {
3901 struct Client *sserv;
3903 /* Check whether the originating server has fully processed
3904 * the burst to it. */
3906 if (!IsServer(sserv))
3907 sserv = cli_user(sserv)->server;
3908 if (IsBurstOrBurstAck(sserv)) {
3909 /* This is a legal but unusual case; the source server
3910 * probably just has not processed the BURST for this
3911 * channel. It SHOULD wipe out all its modes soon, so
3912 * silently ignore the mode change rather than send a
3913 * bounce that could desync modes from our side (that
3914 * have already been sent).
3916 state.mbuf->mb_add = 0;
3917 state.mbuf->mb_rem = 0;
3918 state.mbuf->mb_count = 0;
3919 return state.args_used;
3921 /* Server is desynced; bounce the mode and deop the source
3923 state.flags &= ~MODE_PARSE_SET;
3924 state.flags |= MODE_PARSE_BOUNCE;
3925 state.mbuf->mb_dest &= ~(MODEBUF_DEST_CHANNEL | MODEBUF_DEST_HACK4);
3926 state.mbuf->mb_dest |= MODEBUF_DEST_BOUNCE | MODEBUF_DEST_HACK2;
3927 if (!IsServer(state.cptr))
3928 state.mbuf->mb_dest |= MODEBUF_DEST_DEOP;
3932 break; /* break out of while loop */
3933 } else if (state.flags & MODE_PARSE_STRICT ||
3934 (MyUser(state.sptr) && state.max_args <= 0)) {
3935 state.parc++; /* we didn't actually gobble the argument */
3937 break; /* break out of while loop */
3940 } /* while (*modestr) */
3943 * the rest of the function finishes building resultant MODEs; if the
3944 * origin isn't a member or an oper, skip it.
3946 if (!state.mbuf || state.flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER))
3947 return state.args_used; /* tell our parent how many args we gobbled */
3949 t_mode = state.chptr->mode.mode;
3951 if (state.del & t_mode) { /* delete any modes to be deleted... */
3952 modebuf_mode(state.mbuf, MODE_DEL | (state.del & t_mode));
3954 t_mode &= ~state.del;
3956 if (state.add & ~t_mode) { /* add any modes to be added... */
3957 modebuf_mode(state.mbuf, MODE_ADD | (state.add & ~t_mode));
3959 t_mode |= state.add;
3962 if (state.flags & MODE_PARSE_SET) { /* set the channel modes */
3963 if ((state.chptr->mode.mode & MODE_INVITEONLY) &&
3964 !(t_mode & MODE_INVITEONLY))
3965 mode_invite_clear(state.chptr);
3967 state.chptr->mode.mode = t_mode;
3970 if (state.flags & MODE_PARSE_WIPEOUT) {
3971 if (state.chptr->mode.limit && !(state.done & DONE_LIMIT))
3972 modebuf_mode_uint(state.mbuf, MODE_DEL | MODE_LIMIT,
3973 state.chptr->mode.limit);
3974 if (state.chptr->mode.access && !(state.done & DONE_ACCESS))
3975 modebuf_mode_uint(state.mbuf, MODE_DEL | MODE_ACCESS,
3976 state.chptr->mode.access);
3977 if (state.chptr->mode.altchan && !(state.done & DONE_ALTCHAN))
3978 modebuf_mode_string(state.mbuf, MODE_DEL | MODE_ALTCHAN,
3979 state.chptr->mode.altchan, 0);
3980 if (state.chptr->mode.noflood && !(state.done & DONE_NOFLOOD))
3981 modebuf_mode_string(state.mbuf, MODE_DEL | MODE_NOFLOOD,
3982 state.chptr->mode.noflood, 0);
3983 if (*state.chptr->mode.key && !(state.done & DONE_KEY_DEL))
3984 modebuf_mode_string(state.mbuf, MODE_DEL | MODE_KEY,
3985 state.chptr->mode.key, 0);
3986 if (*state.chptr->mode.upass && !(state.done & DONE_UPASS_DEL))
3987 modebuf_mode_string(state.mbuf, MODE_DEL | MODE_UPASS,
3988 state.chptr->mode.upass, 0);
3989 if (*state.chptr->mode.apass && !(state.done & DONE_APASS_DEL))
3990 modebuf_mode_string(state.mbuf, MODE_DEL | MODE_APASS,
3991 state.chptr->mode.apass, 0);
3994 if (state.done & DONE_BANCLEAN) /* process bans */
3995 mode_process_bans(&state);
3997 /* process client changes */
3998 if (state.cli_change[0].flag)
3999 mode_process_clients(&state);
4001 return state.args_used; /* tell our parent how many args we gobbled */
4005 * Initialize a join buffer
4008 joinbuf_init(struct JoinBuf *jbuf, struct Client *source,
4009 struct Client *connect, unsigned int type, char *comment,
4015 assert(0 != source);
4016 assert(0 != connect);
4018 jbuf->jb_source = source; /* just initialize struct JoinBuf */
4019 jbuf->jb_connect = connect;
4020 jbuf->jb_type = type;
4021 jbuf->jb_comment = comment;
4022 jbuf->jb_create = create;
4024 jbuf->jb_strlen = (((type == JOINBUF_TYPE_JOIN ||
4025 type == JOINBUF_TYPE_PART ||
4026 type == JOINBUF_TYPE_PARTALL) ?
4027 STARTJOINLEN : STARTCREATELEN) +
4028 (comment ? strlen(comment) + 2 : 0));
4030 for (i = 0; i < MAXJOINARGS; i++)
4031 jbuf->jb_channels[i] = 0;
4035 * Add a channel to the join buffer
4038 joinbuf_join(struct JoinBuf *jbuf, struct Channel *chan, unsigned int flags)
4046 sendcmdto_serv_butone(jbuf->jb_source, CMD_JOIN, jbuf->jb_connect, "0");
4050 is_local = IsLocalChannel(chan->chname);
4052 if (jbuf->jb_type == JOINBUF_TYPE_PART ||
4053 jbuf->jb_type == JOINBUF_TYPE_PARTALL) {
4054 struct Membership *member = find_member_link(chan, jbuf->jb_source);
4055 if (IsUserParting(member))
4057 SetUserParting(member);
4059 /* Send notification to channel */
4060 if((chan->mode.mode & MODE_AUDITORIUM) && !(member->status & CHFL_VOICED_OR_OPPED)) {
4061 //send part to ops only
4062 sendcmdto_channel_butserv_butone(jbuf->jb_source, CMD_PART, chan, NULL, SKIP_NONOPS, "%H :%s", chan, jbuf->jb_comment);
4063 if(MyUser(jbuf->jb_source))
4064 sendcmdto_one(jbuf->jb_source, CMD_PART, jbuf->jb_source, "%H :%s", chan, jbuf->jb_comment);
4065 } else if (!(flags & (CHFL_ZOMBIE | CHFL_DELAYED)))
4066 sendcmdto_channel_butserv_butone(jbuf->jb_source, CMD_PART, chan, NULL, 0,
4067 (flags & CHFL_BANNED || !jbuf->jb_comment) ?
4068 ":%H" : "%H :%s", chan, jbuf->jb_comment);
4069 else if (MyUser(jbuf->jb_source))
4070 sendcmdto_one(jbuf->jb_source, CMD_PART, jbuf->jb_source,
4071 (flags & CHFL_BANNED || !jbuf->jb_comment) ?
4072 ":%H" : "%H :%s", chan, jbuf->jb_comment);
4073 /* XXX: Shouldn't we send a PART here anyway? */
4074 /* to users on the channel? Why? From their POV, the user isn't on
4075 * the channel anymore anyway. We don't send to servers until below,
4076 * when we gang all the channel parts together. Note that this is
4077 * exactly the same logic, albeit somewhat more concise, as was in
4078 * the original m_part.c */
4080 if (jbuf->jb_type == JOINBUF_TYPE_PARTALL ||
4081 is_local) /* got to remove user here */
4082 remove_user_from_channel(jbuf->jb_source, chan);
4084 int oplevel = !chan->mode.apass[0] ? MAXOPLEVEL
4085 : (flags & CHFL_CHANNEL_MANAGER) ? 0
4087 /* Add user to channel */
4088 if (((chan->mode.mode & MODE_DELJOINS) && !(flags & CHFL_VOICED_OR_OPPED)) || ((flags & CHFL_INVISIBLE) && !(flags & CHFL_VOICED_OR_OPPED))) {
4089 add_user_to_channel(chan, jbuf->jb_source, flags | CHFL_DELAYED, oplevel);
4091 add_user_to_channel(chan, jbuf->jb_source, flags, oplevel);
4093 /* send JOIN notification to all servers (CREATE is sent later). */
4094 if (jbuf->jb_type != JOINBUF_TYPE_CREATE && !is_local) {
4095 if ((flags & CHFL_INVISIBLE) && !(flags & CHFL_VOICED_OR_OPPED)) {
4096 sendcmdto_serv_butone(jbuf->jb_source, CMD_JOIN, jbuf->jb_connect,
4097 "%H %Tu %i", chan, chan->creationtime, 1);
4099 sendcmdto_serv_butone(jbuf->jb_source, CMD_JOIN, jbuf->jb_connect,
4100 "%H %Tu %i", chan, chan->creationtime, 0);
4104 if((chan->mode.mode & MODE_AUDITORIUM) && !(flags & CHFL_VOICED_OR_OPPED)) {
4105 //we have to send this JOIN event to ops only...
4106 sendcmdto_channel_butserv_butone(jbuf->jb_source, CMD_JOIN, chan, NULL, SKIP_NONOPS, "%H", chan);
4107 if(MyUser(jbuf->jb_source))
4108 sendcmdto_one(jbuf->jb_source, CMD_JOIN, jbuf->jb_source, ":%H", chan);
4110 else if (!((chan->mode.mode & MODE_DELJOINS) && !(flags & CHFL_VOICED_OR_OPPED)) && !((flags & CHFL_INVISIBLE) && !(flags & CHFL_VOICED_OR_OPPED))) {
4111 /* Send the notification to the channel */
4112 sendcmdto_channel_butserv_butone(jbuf->jb_source, CMD_JOIN, chan, NULL, 0, "%H", chan);
4114 /* send an op, too, if needed */
4115 if (flags & CHFL_CHANOP && (oplevel < MAXOPLEVEL || !MyUser(jbuf->jb_source)))
4116 sendcmdto_channel_butserv_butone((chan->mode.apass[0] ? &his : jbuf->jb_source),
4117 CMD_MODE, chan, NULL, 0, "%H +o %C",
4118 chan, jbuf->jb_source);
4119 } else if (MyUser(jbuf->jb_source)) {
4120 sendcmdto_one(jbuf->jb_source, CMD_JOIN, jbuf->jb_source, ":%H", chan);
4124 if (jbuf->jb_type == JOINBUF_TYPE_PARTALL ||
4125 jbuf->jb_type == JOINBUF_TYPE_JOIN || is_local)
4126 return; /* don't send to remote */
4128 /* figure out if channel name will cause buffer to be overflowed */
4129 len = chan ? strlen(chan->chname) + 1 : 2;
4130 if (jbuf->jb_strlen + len > BUFSIZE)
4131 joinbuf_flush(jbuf);
4133 /* add channel to list of channels to send and update counts */
4134 jbuf->jb_channels[jbuf->jb_count++] = chan;
4135 jbuf->jb_strlen += len;
4137 /* if we've used up all slots, flush */
4138 if (jbuf->jb_count >= MAXJOINARGS)
4139 joinbuf_flush(jbuf);
4143 * Flush the channel list to remote servers
4146 joinbuf_flush(struct JoinBuf *jbuf)
4148 char chanlist[BUFSIZE];
4152 if (!jbuf->jb_count || jbuf->jb_type == JOINBUF_TYPE_PARTALL ||
4153 jbuf->jb_type == JOINBUF_TYPE_JOIN)
4154 return 0; /* no joins to process */
4156 for (i = 0; i < jbuf->jb_count; i++) { /* build channel list */
4157 build_string(chanlist, &chanlist_i,
4158 jbuf->jb_channels[i] ? jbuf->jb_channels[i]->chname : "0", 0,
4159 i == 0 ? '\0' : ',');
4160 if (JOINBUF_TYPE_PART == jbuf->jb_type)
4161 /* Remove user from channel */
4162 remove_user_from_channel(jbuf->jb_source, jbuf->jb_channels[i]);
4164 jbuf->jb_channels[i] = 0; /* mark slot empty */
4167 jbuf->jb_count = 0; /* reset base counters */
4168 jbuf->jb_strlen = ((jbuf->jb_type == JOINBUF_TYPE_PART ?
4169 STARTJOINLEN : STARTCREATELEN) +
4170 (jbuf->jb_comment ? strlen(jbuf->jb_comment) + 2 : 0));
4172 /* and send the appropriate command */
4173 switch (jbuf->jb_type) {
4174 case JOINBUF_TYPE_CREATE:
4175 sendcmdto_serv_butone(jbuf->jb_source, CMD_CREATE, jbuf->jb_connect,
4176 "%s %Tu", chanlist, jbuf->jb_create);
4179 case JOINBUF_TYPE_PART:
4180 sendcmdto_serv_butone(jbuf->jb_source, CMD_PART, jbuf->jb_connect,
4181 jbuf->jb_comment ? "%s :%s" : "%s", chanlist,
4189 /* Returns TRUE (1) if client is invited, FALSE (0) if not */
4190 int IsInvited(struct Client* cptr, const void* chptr)
4194 for (lp = (cli_user(cptr))->invited; lp; lp = lp->next)
4195 if (lp->value.chptr == chptr)
4200 /* RevealDelayedJoin: sends a join for a hidden user */
4202 void RevealDelayedJoin(struct Membership *member)
4204 ClearDelayedJoin(member);
4205 sendcmdto_channel_butserv_butone(member->user, CMD_JOIN, member->channel, member->user, 0, ":%H",
4207 CheckDelayedJoins(member->channel);
4210 /* CheckDelayedJoins: checks and clear +d if necessary */
4212 void CheckDelayedJoins(struct Channel *chan)
4214 if ((chan->mode.mode & MODE_WASDELJOINS) && !find_delayed_joins(chan)) {
4215 chan->mode.mode &= ~MODE_WASDELJOINS;
4216 sendcmdto_channel_butserv_butone(&me, CMD_MODE, chan, NULL, 0,
4218 sendcmdto_channel_servers_butone(&me, CMD_MODE, chan, NULL, 0,
4223 void CheckEnableDelayedJoins(struct Channel *chan) {
4224 if (!(chan->mode.mode & MODE_WASDELJOINS) && find_delayed_joins(chan)) {
4225 chan->mode.mode |= MODE_WASDELJOINS;
4226 sendcmdto_channel_butserv_butone(&me, CMD_MODE, chan, NULL, 0,
4228 sendcmdto_channel_servers_butone(&me, CMD_MODE, chan, NULL, 0,
4233 /* checks whether a channel is nonpersistent with no users and deletes it
4234 * returns 1 if deleted, otherwise 0
4236 signed int destruct_nonpers_channel(struct Channel *chptr) {
4237 if(!(chptr->mode.mode & MODE_PERSIST) && chptr->users == 0) {
4238 if(chptr->destruct_event)
4239 remove_destruct_event(chptr);
4240 destruct_channel(chptr);
4246 /** Send a join for the user if (s)he is a hidden member of the channel.
4248 void RevealDelayedJoinIfNeeded(struct Client *sptr, struct Channel *chptr)
4250 struct Membership *member = find_member_link(chptr, sptr);
4251 if (member && IsDelayedJoin(member) && !IsInvisibleJoin(member))
4252 RevealDelayedJoin(member);
4255 /** Extended multi target message block check.
4256 * The channelmode MODE_NOAMSGS prevents multi-target messages from being sent
4257 * to the channel. Since many clients sent these so called AMSGS manually with
4258 * one PRIVMSG per channel, we have this extended check which prevents messages
4259 * from being sent to multiple channels.
4261 * The check is quite simple: We save the last sent message of every client.
4262 * When the client sends a new PRIVMSG to another channel, we compare the
4263 * message to the previously sent message and if they equal we may drop the new
4264 * message instead of broadcasting it.
4265 * There are several additional checks. That is, the new message must be sent in
4266 * a specific amount of time in which this check works. If the ducplicate
4267 * message is delayed for too long then it will pass this check. Furthermore,
4268 * there is a specific number a message must be already sent to different
4269 * channels until it is blocked.
4270 * Both numbers can be configured by the FEATURES subsystem.
4272 * This function returns 0 if the message may pass and 1 if the message should
4274 * For this function to work properly it must be called on every PRIVMSG which
4275 * is sent by any user.
4277 * Since users are creative and sometimes smart (damnit!) this function can be
4278 * outsourced into a dynamic library so we can adjust this function to protect
4279 * against any user scripts on-the-fly.
4283 int ext_amsg_block(struct Client *cptr, struct Channel *chptr, const char *msg)
4287 /* First on every message we check whether the mechanism is enabled.
4288 * If it is enabled, we check:
4289 * - whether the channel has MODE_NOAMSGS
4290 * - whether it was sent in between the configured time span
4291 * - whether it matches the previous message
4292 * in exactly this order. If at least one test fails, we do not block the
4294 * If at least one test failed we copy the message into the users buffer so
4295 * it will be checked the next time he sends a message. We also update the
4296 * timestamp of the user.
4298 amsg_time = feature_int(FEAT_NOAMSG_TIME);
4300 /* first of all strip the message (filter out invisible content) */
4301 char *stripped_message = MyMalloc(BUFSIZE + 1);
4302 strcpy(stripped_message, msg);
4303 char p = stripped_message[0];
4305 int is_visible = 1, is_ccode = 0, i = 0, j = 0;
4307 for(i = 0; p != '\n'; p = stripped_message[++i]) {
4311 } else if(is_ccode) {
4312 if((p >= 48 && p <= 57) || p == 44) {
4322 if(p != codes[j++]) {
4327 //END of color code...
4329 if(is_ccode != 1 && codes[j] != 0) is_ccode = 3;
4333 for(k = 0; k < j-1; k++) {
4334 if(codes[k] != 48) {
4340 } else if(is_ccode == 2) {
4342 } else if(is_ccode == 3) {
4350 stripped_message[p_pos++] = p;
4353 stripped_message[p_pos++] = 0;
4354 /* Allocate a new buffer if there is none, yet. */
4355 if(!cli_user(cptr)->lastmsg) {
4356 cli_user(cptr)->lastmsg = MyMalloc(BUFSIZE + 1);
4357 memset(cli_user(cptr)->lastmsg, 0, BUFSIZE + 1);
4359 if((chptr->mode.mode & MODE_NOAMSGS) &&
4360 ((cli_user(cptr)->lastmsg_time + amsg_time) >= CurrentTime) &&
4361 (strcmp(cli_user(cptr)->lastmsg, stripped_message) == 0)) {
4362 cli_user(cptr)->lastmsg_time = CurrentTime;
4363 cli_user(cptr)->lastmsg_num++;
4364 MyFree(stripped_message);
4365 if(cli_user(cptr)->lastmsg_num >= feature_int(FEAT_NOAMSG_NUM)) return 1;
4368 /* Message did not match so update the data. */
4369 cli_user(cptr)->lastmsg_time = CurrentTime;
4370 cli_user(cptr)->lastmsg_num = 0;
4371 strcpy(cli_user(cptr)->lastmsg, stripped_message);
4372 MyFree(stripped_message);
4377 /** Extended flood check.
4378 * The channelmode MODE_NOFLOOD prevents users from flooding the channel.
4380 * This function returns 0 if the message may pass and 1 if the message should
4382 * For this function to work properly it must be called on every PRIVMSG which
4383 * is sent by any user.
4387 int ext_noflood_block(struct Client *cptr, struct Channel *chptr) {
4388 if(!*chptr->mode.noflood) return 0;
4389 struct Membership *member = find_member_link(chptr, cptr);
4390 if(!member) return 0; //TODO: we've no check for -n channels implemented, yet
4391 //check if this user is really affected by +f
4392 unsigned int flags = (chptr->mode.noflood_value & 0x00000007); //0000 0000 0000 0000 0000 0000 0000 0111 = 0x00000007 >> 0
4393 unsigned int count = (chptr->mode.noflood_value & 0x00001ff8) >> 3; //0000 0000 0000 0000 0001 1111 1111 1000 = 0x00001ff8 >> 3
4394 int time = (chptr->mode.noflood_value & 0x07ffe000) >> 13; //0000 0111 1111 1111 1110 0000 0000 0000 = 0x07ffe000 >> 13
4395 if(count == 0 || time == 0) return 0;
4396 if(!(flags & FLFL_NOFLOOD) && HasPriv(cptr, PRIV_FLOOD))
4398 if(!(flags & FLFL_CHANOP) && (member->status & CHFL_CHANOP))
4400 if(!(flags & (FLFL_CHANOP | FLFL_VOICE)) && (member->status & CHFL_VOICE))
4403 struct MemberFlood *floodnode, *prev_floodnode;
4404 for (floodnode = member->flood; floodnode; floodnode = floodnode->next_memberflood) {
4405 if(floodnode->time + time > CurrentTime) {
4406 if(floodcount == 0 && floodnode != member->flood) {
4408 prev_floodnode->next_memberflood = free_MemberFlood;
4409 free_MemberFlood = prev_floodnode;
4410 member->flood = floodnode;
4414 prev_floodnode = floodnode;
4416 Debug((DEBUG_INFO, "floodcount: %i", floodcount));
4417 if(floodcount >= count) return 1; //blocked!
4418 //add a new floodnode :)
4419 if(free_MemberFlood) {
4420 floodnode = free_MemberFlood;
4421 free_MemberFlood = floodnode->next_memberflood;
4423 floodnode = (struct MemberFlood*) MyMalloc(sizeof(struct MemberFlood));
4424 floodnode->time = CurrentTime;
4425 floodnode->next_memberflood = NULL;
4427 prev_floodnode->next_memberflood = floodnode;
4429 member->flood = floodnode;