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)) ||
798 ((chptr->mode.mode & MODE_SSLCHAN) && !IsSSL(cptr)))
801 return !find_ban(cptr, chptr->banlist);
803 return member_can_send_to_channel(member, reveal);
806 /** Returns the name of a channel that prevents the user from changing nick.
807 * if a member and not (opped or voiced) and (banned or moderated), return
808 * the name of the first channel banned on.
810 * @param cptr The client
811 * @param new_nick The new nick of the client
813 * @returns the name of the first channel banned on, or NULL if the user
816 const char* find_no_nickchange_channel(struct Client* cptr, const char *new_nick)
819 struct Membership* member;
820 for (member = (cli_user(cptr))->channel; member;
821 member = member->next_channel) {
822 if (IsVoicedOrOpped(member))
824 if ((member->channel->mode.mode & MODE_MODERATED)
825 || (member->channel->mode.mode & MODE_REGONLY && !IsAccount(cptr))
826 || (member->channel->mode.mode & MODE_SSLCHAN && !IsSSL(cptr))
827 || is_banned(member) || (new_nick && is_banned_with_nick(member, new_nick)))
828 return member->channel->chname;
835 /** Fill mbuf/pbuf with modes from chptr
836 * write the "simple" list of channel modes for channel chptr onto buffer mbuf
837 * with the parameters in pbuf as visible by cptr.
839 * This function will hide keys from non-op'd, non-server clients.
841 * @param cptr The client to generate the mode for.
842 * @param mbuf The buffer to write the modes into.
843 * @param pbuf The buffer to write the mode parameters into.
844 * @param buflen The length of the buffers.
845 * @param chptr The channel to get the modes from.
846 * @param member The membership of this client on this channel (or NULL
847 * if this client isn't on this channel)
850 void channel_modes(struct Client *cptr, char *mbuf, char *pbuf, int buflen,
851 struct Channel *chptr, struct Membership *member)
853 int previous_parameter = 0;
860 if (chptr->mode.mode & MODE_SECRET)
862 else if (chptr->mode.mode & MODE_PRIVATE)
864 if (chptr->mode.mode & MODE_MODERATED)
866 if (chptr->mode.mode & MODE_TOPICLIMIT)
868 if (chptr->mode.mode & MODE_INVITEONLY)
870 if (chptr->mode.mode & MODE_NOPRIVMSGS)
872 if (chptr->mode.mode & MODE_REGONLY)
874 if (chptr->mode.mode & MODE_DELJOINS)
876 else if (MyUser(cptr) && (chptr->mode.mode & MODE_WASDELJOINS))
878 if (chptr->mode.mode & MODE_NOCOLOUR)
880 if (chptr->mode.mode & MODE_NOCTCP)
882 if (chptr->mode.mode & MODE_PERSIST)
884 if (chptr->mode.mode & MODE_REGISTERED)
886 if (chptr->mode.mode & MODE_NONOTICE)
888 if (chptr->mode.mode & MODE_NOAMSGS)
890 if (chptr->mode.mode & MODE_QUARANTINE)
892 if (chptr->mode.mode & MODE_AUDITORIUM)
894 if (chptr->mode.mode & MODE_SSLCHAN)
896 if (chptr->mode.limit) {
898 ircd_snprintf(0, pbuf, buflen, "%u", chptr->mode.limit);
899 previous_parameter = 1;
901 if (chptr->mode.access) {
903 if (previous_parameter)
905 ircd_snprintf(0, pbuf, buflen, "%u", chptr->mode.access);
906 previous_parameter = 1;
908 if (*chptr->mode.altchan) {
910 if (previous_parameter)
912 strcat(pbuf, chptr->mode.altchan);
913 previous_parameter = 1;
915 if (*chptr->mode.noflood) {
917 if (previous_parameter)
919 strcat(pbuf, chptr->mode.noflood);
920 previous_parameter = 1;
922 if (*chptr->mode.key) {
924 if (previous_parameter)
926 if (is_chan_op(cptr, chptr) || IsServer(cptr) || IsOper(cptr)) {
927 strcat(pbuf, chptr->mode.key);
930 previous_parameter = 1;
932 if (*chptr->mode.apass) {
934 if (previous_parameter)
936 if (IsServer(cptr) || IsOper(cptr)) {
937 strcat(pbuf, chptr->mode.apass);
940 previous_parameter = 1;
942 if (*chptr->mode.upass) {
944 if (previous_parameter)
946 if (IsServer(cptr) || (member && IsChanOp(member) && OpLevel(member) == 0) || IsOper(cptr)) {
947 strcat(pbuf, chptr->mode.upass);
954 /** Compare two members oplevel
956 * @param mp1 Pointer to a pointer to a membership
957 * @param mp2 Pointer to a pointer to a membership
959 * @returns 0 if equal, -1 if mp1 is lower, +1 otherwise.
963 int compare_member_oplevel(const void *mp1, const void *mp2)
965 struct Membership const* member1 = *(struct Membership const**)mp1;
966 struct Membership const* member2 = *(struct Membership const**)mp2;
967 if (member1->oplevel == member2->oplevel)
969 return (member1->oplevel < member2->oplevel) ? -1 : 1;
972 /* send "cptr" a full list of the modes for channel chptr.
974 * Sends a BURST line to cptr, bursting all the modes for the channel.
976 * @param cptr Client pointer
977 * @param chptr Channel pointer
979 void send_channel_modes(struct Client *cptr, struct Channel *chptr)
981 /* The order in which modes are generated is now mandatory */
982 static unsigned int current_flags[4] =
983 { 0, CHFL_VOICE, CHFL_CHANOP, CHFL_CHANOP | CHFL_VOICE };
989 struct Membership* member;
991 char modebuf[MODEBUFLEN];
992 char parabuf[MODEBUFLEN];
994 int number_of_ops = 0;
995 int opped_members_index = 0;
996 struct Membership** opped_members = NULL;
997 int last_oplevel = 0;
998 int send_oplevels = 0;
1003 if (IsLocalChannel(chptr->chname))
1006 member = chptr->members;
1007 lp2 = chptr->banlist;
1009 *modebuf = *parabuf = '\0';
1010 channel_modes(cptr, modebuf, parabuf, sizeof(parabuf), chptr, 0);
1012 for (first = 1; full; first = 0) /* Loop for multiple messages */
1014 full = 0; /* Assume by default we get it
1015 all in one message */
1017 /* (Continued) prefix: "<Y> B <channel> <TS>" */
1018 /* is there any better way we can do this? */
1019 mb = msgq_make(&me, "%C " TOK_BURST " %H %Tu", &me, chptr,
1020 chptr->creationtime);
1022 if (first && modebuf[1]) /* Add simple modes (Aiklmnpstu)
1025 /* prefix: "<Y> B <channel> <TS>[ <modes>[ <params>]]" */
1026 msgq_append(&me, mb, " %s", modebuf);
1029 msgq_append(&me, mb, " %s", parabuf);
1033 * Attach nicks, comma separated " nick[:modes],nick[:modes],..."
1035 * First find all opless members.
1036 * Run 2 times over all members, to group the members with
1037 * and without voice together.
1038 * Then run 2 times over all opped members (which are ordered
1039 * by op-level) to also group voice and non-voice together.
1041 for (first = 1; flag_cnt < 4; new_mode = 1, ++flag_cnt)
1045 if (flag_cnt < 2 && IsChanOp(member))
1048 * The first loop (to find all non-voice/op), we count the ops.
1049 * The second loop (to find all voiced non-ops), store the ops
1050 * in a dynamic array.
1055 opped_members[opped_members_index++] = member;
1056 /* We also send oplevels if anyone is below the weakest level. */
1057 if (OpLevel(member) < MAXOPLEVEL)
1060 /* Only handle the members with the flags that we are interested in. */
1061 if ((member->status & CHFL_VOICED_OR_OPPED) == current_flags[flag_cnt])
1063 if (msgq_bufleft(mb) < NUMNICKLEN + 3 + MAXOPLEVELDIGITS)
1064 /* The 3 + MAXOPLEVELDIGITS is a possible ",:v999". */
1066 full = 1; /* Make sure we continue after
1067 sending it so far */
1068 /* Ensure the new BURST line contains the current
1069 * ":mode", except when there is no mode yet. */
1070 new_mode = (flag_cnt > 0) ? 1 : 0;
1071 break; /* Do not add this member to this message */
1073 msgq_append(&me, mb, "%c%C", first ? ' ' : ',', member->user);
1074 first = 0; /* From now on, use commas to add new nicks */
1077 * Do we have a nick with a new mode ?
1078 * Or are we starting a new BURST line?
1083 * This means we are at the _first_ member that has only
1084 * voice, or the first member that has only ops, or the
1085 * first member that has voice and ops (so we get here
1086 * at most three times, plus once for every start of
1087 * a continued BURST line where only these modes is current.
1088 * In the two cases where the current mode includes ops,
1089 * we need to add the _absolute_ value of the oplevel to the mode.
1091 char tbuf[3 + MAXOPLEVELDIGITS] = ":";
1094 if (HasVoice(member)) /* flag_cnt == 1 or 3 */
1096 if (IsChanOp(member)) /* flag_cnt == 2 or 3 */
1098 /* append the absolute value of the oplevel */
1100 loc += ircd_snprintf(0, tbuf + loc, sizeof(tbuf) - loc, "%u", last_oplevel = member->oplevel);
1105 msgq_append(&me, mb, tbuf);
1108 else if (send_oplevels && flag_cnt > 1 && last_oplevel != member->oplevel)
1111 * This can't be the first member of a (continued) BURST
1112 * message because then either flag_cnt == 0 or new_mode == 1
1113 * Now we need to append the incremental value of the oplevel.
1115 char tbuf[2 + MAXOPLEVELDIGITS];
1116 ircd_snprintf(0, tbuf, sizeof(tbuf), ":%u", member->oplevel - last_oplevel);
1117 last_oplevel = member->oplevel;
1118 msgq_append(&me, mb, tbuf);
1121 /* Go to the next `member'. */
1123 member = member->next_member;
1125 member = opped_members[++opped_members_index];
1130 /* Point `member' at the start of the list again. */
1133 member = chptr->members;
1134 /* Now, after one loop, we know the number of ops and can
1135 * allocate the dynamic array with pointer to the ops. */
1136 opped_members = (struct Membership**)
1137 MyMalloc((number_of_ops + 1) * sizeof(struct Membership*));
1138 opped_members[number_of_ops] = NULL; /* Needed for loop termination */
1142 /* At the end of the second loop, sort the opped members with
1143 * increasing op-level, so that we will output them in the
1144 * correct order (and all op-level increments stay positive) */
1146 qsort(opped_members, number_of_ops,
1147 sizeof(struct Membership*), compare_member_oplevel);
1148 /* The third and fourth loop run only over the opped members. */
1149 member = opped_members[(opped_members_index = 0)];
1152 } /* loop over 0,+v,+o,+ov */
1156 /* Attach all bans, space separated " :%ban ban ..." */
1157 for (first = 2; lp2; lp2 = lp2->next)
1159 len = strlen(lp2->banstr);
1160 if (msgq_bufleft(mb) < len + 1 + first)
1161 /* The +1 stands for the added ' '.
1162 * The +first stands for the added ":%".
1168 msgq_append(&me, mb, " %s%s", first ? ":%" : "",
1174 send_buffer(cptr, mb, 0); /* Send this message */
1176 } /* Continue when there was something
1177 that didn't fit (full==1) */
1179 MyFree(opped_members);
1180 if (feature_bool(FEAT_TOPIC_BURST) && (chptr->topic[0] != '\0'))
1181 sendcmdto_one(&me, CMD_TOPIC, cptr, "%H %Tu %Tu :%s", chptr,
1182 chptr->creationtime, chptr->topic_time, chptr->topic);
1185 /** Canonify a mask.
1188 * @author Carlo Wood (Run),
1191 * When the nick is longer then NICKLEN, it is cut off (its an error of course).
1192 * When the user name or host name are too long (USERLEN and HOSTLEN
1193 * respectively) then they are cut off at the start with a '*'.
1195 * The following transformations are made:
1197 * 1) xxx -> nick!*@*
1198 * 2) xxx.xxx -> *!*\@host
1199 * 3) xxx\!yyy -> nick!user\@*
1200 * 4) xxx\@yyy -> *!user\@host
1201 * 5) xxx!yyy\@zzz -> nick!user\@host
1203 * @param mask The uncanonified mask.
1204 * @returns The updated mask in a static buffer.
1206 char *pretty_mask(char *mask)
1208 static char star[2] = { '*', 0 };
1209 static char retmask[NICKLEN + USERLEN + HOSTLEN + 3];
1210 char *last_dot = NULL;
1213 /* Case 1: default */
1218 /* Do a _single_ pass through the characters of the mask: */
1219 for (ptr = mask; *ptr; ++ptr)
1223 /* Case 3 or 5: Found first '!' (without finding a '@' yet) */
1227 else if (*ptr == '@')
1229 /* Case 4: Found last '@' (without finding a '!' yet) */
1234 else if (*ptr == '.' || *ptr == ':')
1236 /* Case 2: Found character specific to IP or hostname (without
1237 * finding a '!' or '@' yet) */
1247 /* Case 4 or 5: Found last '@' */
1253 if (user == star && last_dot)
1263 char *nick_end = (user != star) ? user - 1 : ptr;
1264 if (nick_end - nick > NICKLEN)
1270 char *user_end = (host != star) ? host - 1 : ptr;
1271 if (user_end - user > USERLEN)
1273 user = user_end - USERLEN;
1278 if (host != star && ptr - host > HOSTLEN)
1280 host = ptr - HOSTLEN;
1283 ircd_snprintf(0, retmask, sizeof(retmask), "%s!%s@%s", nick, user, host);
1287 /** send a banlist to a client for a channel
1289 * @param cptr Client to send the banlist to.
1290 * @param chptr Channel whose banlist to send.
1292 static void send_ban_list(struct Client* cptr, struct Channel* chptr)
1299 for (lp = chptr->banlist; lp; lp = lp->next)
1300 send_reply(cptr, RPL_BANLIST, chptr->chname, lp->banstr, lp->who, lp->when);
1302 send_reply(cptr, RPL_ENDOFBANLIST, chptr->chname);
1305 /** Get a channel block, creating if necessary.
1306 * Get Channel block for chname (and allocate a new channel
1307 * block, if it didn't exists before).
1309 * @param cptr Client joining the channel.
1310 * @param chname The name of the channel to join.
1311 * @param flag set to CGT_CREATE to create the channel if it doesn't
1314 * @returns NULL if the channel is invalid, doesn't exist and CGT_CREATE
1315 * wasn't specified or a pointer to the channel structure
1317 struct Channel *get_channel(struct Client *cptr, char *chname, ChannelGetType flag)
1319 struct Channel *chptr;
1322 if (EmptyString(chname))
1325 len = strlen(chname);
1326 if (MyUser(cptr) && len > CHANNELLEN)
1329 *(chname + CHANNELLEN) = '\0';
1331 if ((chptr = FindChannel(chname)))
1333 if (flag == CGT_CREATE)
1335 chptr = (struct Channel*) MyMalloc(sizeof(struct Channel) + len);
1337 ++UserStats.channels;
1338 memset(chptr, 0, sizeof(struct Channel));
1339 strcpy(chptr->chname, chname);
1340 if (GlobalChannelList)
1341 GlobalChannelList->prev = chptr;
1343 chptr->next = GlobalChannelList;
1344 chptr->creationtime = MyUser(cptr) ? TStime() : (time_t) 0;
1345 GlobalChannelList = chptr;
1351 /** invite a user to a channel.
1353 * Adds an invite for a user to a channel. Limits the number of invites
1354 * to FEAT_MAXCHANNELSPERUSER. Does not sent notification to the user.
1356 * @param cptr The client to be invited.
1357 * @param chptr The channel to be invited to.
1359 void add_invite(struct Client *cptr, struct Channel *chptr)
1361 struct SLink *inv, **tmp;
1362 unsigned int maxchans;
1364 del_invite(cptr, chptr);
1366 * Delete last link in chain if the list is max length
1368 assert(list_length((cli_user(cptr))->invited) == (cli_user(cptr))->invites);
1369 maxchans = cli_confs(cptr)->value.aconf ? ConfMaxChannels(cli_confs(cptr)->value.aconf) : feature_int(FEAT_MAXCHANNELSPERUSER);
1370 if (((cli_user(cptr))->invites >= maxchans && !HasPriv(cptr, PRIV_CHAN_LIMIT)) || cli_user(cptr)->invites > 100) /* Hard limit of 100. */
1371 del_invite(cptr, (cli_user(cptr))->invited->value.chptr);
1373 * Add client to channel invite list
1376 inv->value.cptr = cptr;
1377 inv->next = chptr->invites;
1378 chptr->invites = inv;
1380 * Add channel to the end of the client invite list
1382 for (tmp = &((cli_user(cptr))->invited); *tmp; tmp = &((*tmp)->next));
1384 inv->value.chptr = chptr;
1387 (cli_user(cptr))->invites++;
1390 /** Delete an invite
1391 * Delete Invite block from channel invite list and client invite list
1393 * @param cptr Client pointer
1394 * @param chptr Channel pointer
1396 void del_invite(struct Client *cptr, struct Channel *chptr)
1398 struct SLink **inv, *tmp;
1400 for (inv = &(chptr->invites); (tmp = *inv); inv = &tmp->next)
1401 if (tmp->value.cptr == cptr)
1406 (cli_user(cptr))->invites--;
1410 for (inv = &((cli_user(cptr))->invited); (tmp = *inv); inv = &tmp->next)
1411 if (tmp->value.chptr == chptr)
1420 /** @page zombie Explanation of Zombies
1424 * A channel member is turned into a zombie when he is kicked from a
1425 * channel but his server has not acknowledged the kick. Servers that
1426 * see the member as a zombie can accept actions he performed before
1427 * being kicked, without allowing chanop operations from outsiders or
1428 * desyncing the network.
1436 * X --a--> A --b--> B --d--> D
1441 * Where `who' is being KICK-ed by a "KICK" message received by server 'A'
1442 * via 'a', or on server 'B' via either 'b' or 'c', or on server D via 'd'.
1444 * a) On server A : set CHFL_ZOMBIE for `who' (lp) and pass on the KICK.
1445 * Remove the user immediately when no users are left on the channel.
1446 * b) On server B : remove the user (who/lp) from the channel, send a
1447 * PART upstream (to A) and pass on the KICK.
1448 * c) KICKed by `client'; On server B : remove the user (who/lp) from the
1449 * channel, and pass on the KICK.
1450 * d) On server D : remove the user (who/lp) from the channel, and pass on
1454 * - Setting the ZOMBIE flag never hurts, we either remove the
1455 * client after that or we don't.
1456 * - The KICK message was already passed on, as should be in all cases.
1457 * - `who' is removed in all cases except case a) when users are left.
1458 * - A PART is only sent upstream in case b).
1464 * 1 --- 2 --- 3 --- 4 --- 5
1469 * We also need to turn 'who' into a zombie on servers 1 and 6,
1470 * because a KICK from 'who' (kicking someone else in that direction)
1471 * can arrive there afterward - which should not be bounced itself.
1472 * Therefore case a) also applies for servers 1 and 6.
1477 /** Turn a user on a channel into a zombie
1478 * This function turns a user into a zombie (see \ref zombie)
1480 * @param member The structure representing this user on this channel.
1481 * @param who The client that is being kicked.
1482 * @param cptr The connection the kick came from.
1483 * @param sptr The client that is doing the kicking.
1484 * @param chptr The channel the user is being kicked from.
1486 void make_zombie(struct Membership* member, struct Client* who,
1487 struct Client* cptr, struct Client* sptr, struct Channel* chptr)
1489 assert(0 != member);
1494 /* Default for case a): */
1497 /* Case b) or c) ?: */
1498 if (MyUser(who)) /* server 4 */
1500 if (IsServer(cptr)) /* Case b) ? */
1501 sendcmdto_one(who, CMD_PART, cptr, "%H", chptr);
1502 remove_user_from_channel(who, chptr);
1505 if (cli_from(who) == cptr) /* True on servers 1, 5 and 6 */
1507 struct Client *acptr = IsServer(sptr) ? sptr : (cli_user(sptr))->server;
1508 for (; acptr != &me; acptr = (cli_serv(acptr))->up)
1509 if (acptr == (cli_user(who))->server) /* Case d) (server 5) */
1511 remove_user_from_channel(who, chptr);
1516 /* Case a) (servers 1, 2, 3 and 6) */
1517 if (channel_all_zombies(chptr))
1518 remove_user_from_channel(who, chptr);
1520 /* XXX Can't actually call Debug here; if the channel is all zombies,
1521 * chptr will no longer exist when we get here.
1522 Debug((DEBUG_INFO, "%s is now a zombie on %s", who->name, chptr->chname));
1526 /** returns the number of zombies on a channel
1527 * @param chptr Channel to count zombies in.
1529 * @returns The number of zombies on the channel.
1531 int number_of_zombies(struct Channel *chptr)
1533 struct Membership* member;
1537 for (member = chptr->members; member; member = member->next_member) {
1538 if (IsZombie(member))
1544 /** Concatenate some strings together.
1545 * This helper function builds an argument string in strptr, consisting
1546 * of the original string, a space, and str1 and str2 concatenated (if,
1547 * of course, str2 is not NULL)
1549 * @param strptr The buffer to concatenate into
1550 * @param strptr_i modified offset to the position to modify
1551 * @param str1 The string to concatenate from.
1552 * @param str2 The second string to contatenate from.
1553 * @param c Charactor to separate the string from str1 and str2.
1556 build_string(char *strptr, int *strptr_i, const char *str1,
1557 const char *str2, char c)
1560 strptr[(*strptr_i)++] = c;
1563 strptr[(*strptr_i)++] = *(str1++);
1567 strptr[(*strptr_i)++] = *(str2++);
1569 strptr[(*strptr_i)] = '\0';
1572 /** Flush out the modes
1573 * This is the workhorse of our ModeBuf suite; this actually generates the
1574 * output MODE commands, HACK notices, or whatever. It's pretty complicated.
1576 * @param mbuf The mode buffer to flush
1577 * @param all If true, flush all modes, otherwise leave partial modes in the
1583 modebuf_flush_int(struct ModeBuf *mbuf, int all)
1585 /* we only need the flags that don't take args right now */
1586 static ulong64 flags[] = {
1587 /* MODE_CHANOP, 'o', */
1588 /* MODE_VOICE, 'v', */
1591 MODE_MODERATED, 'm',
1592 MODE_TOPICLIMIT, 't',
1593 MODE_INVITEONLY, 'i',
1594 MODE_NOPRIVMSGS, 'n',
1597 MODE_REGISTERED, 'R',
1598 /* MODE_KEY, 'k', */
1599 /* MODE_BAN, 'b', */
1601 /* MODE_APASS, 'A', */
1602 /* MODE_UPASS, 'U', */
1606 /* MODE_ALTCHAN, 'F', */
1607 /* MODE_NOFLOOD, 'f', */
1611 MODE_QUARANTINE, 'Q',
1612 MODE_AUDITORIUM, 'u',
1616 static ulong64 local_flags[] = {
1617 MODE_WASDELJOINS, 'd',
1623 struct Client *app_source; /* where the MODE appears to come from */
1625 char addbuf[20], addbuf_local[20]; /* accumulates +psmtin, etc. */
1626 int addbuf_i = 0, addbuf_local_i = 0;
1627 char rembuf[20], rembuf_local[20]; /* accumulates -psmtin, etc. */
1628 int rembuf_i = 0, rembuf_local_i = 0;
1629 char *bufptr; /* we make use of indirection to simplify the code */
1632 char addstr[BUFSIZE]; /* accumulates MODE parameters to add */
1634 char remstr[BUFSIZE]; /* accumulates MODE parameters to remove */
1636 char *strptr; /* more indirection to simplify the code */
1639 int totalbuflen = BUFSIZE - 200; /* fuzz factor -- don't overrun buffer! */
1642 char limitbuf[20],accessbuf[20]; /* convert limits to strings */
1644 ulong64 limitdel = MODE_LIMIT;
1645 ulong64 accessdel = MODE_ACCESS;
1649 /* If the ModeBuf is empty, we have nothing to do */
1650 if (mbuf->mb_add == 0 && mbuf->mb_rem == 0 && mbuf->mb_count == 0)
1653 /* Ok, if we were given the OPMODE flag, or its a server, hide the source.
1655 if (feature_bool(FEAT_HIS_MODEWHO) &&
1656 (mbuf->mb_dest & MODEBUF_DEST_OPMODE ||
1657 IsServer(mbuf->mb_source) ||
1658 IsMe(mbuf->mb_source)))
1661 app_source = mbuf->mb_source;
1664 * Account for user we're bouncing; we have to get it in on the first
1665 * bounced MODE, or we could have problems
1667 if (mbuf->mb_dest & MODEBUF_DEST_DEOP)
1668 totalbuflen -= 6; /* numeric nick == 5, plus one space */
1670 /* Calculate the simple flags */
1671 for (flag_p = flags; flag_p[0]; flag_p += 2) {
1672 if (*flag_p & mbuf->mb_add)
1673 addbuf[addbuf_i++] = flag_p[1];
1674 else if (*flag_p & mbuf->mb_rem)
1675 rembuf[rembuf_i++] = flag_p[1];
1678 /* Some flags may be for local display only. */
1679 for (flag_p = local_flags; flag_p[0]; flag_p += 2) {
1680 if (*flag_p & mbuf->mb_add)
1681 addbuf_local[addbuf_local_i++] = flag_p[1];
1682 else if (*flag_p & mbuf->mb_rem)
1683 rembuf_local[rembuf_local_i++] = flag_p[1];
1686 /* Now go through the modes with arguments... */
1687 for (i = 0; i < mbuf->mb_count; i++) {
1688 if (MB_TYPE(mbuf, i) & MODE_ADD) { /* adding or removing? */
1690 bufptr_i = &addbuf_i;
1693 bufptr_i = &rembuf_i;
1696 if (MB_TYPE(mbuf, i) & (MODE_CHANOP | MODE_VOICE)) {
1697 tmp = strlen(cli_name(MB_CLIENT(mbuf, i)));
1699 if ((totalbuflen - IRCD_MAX(9, tmp)) <= 0) /* don't overflow buffer */
1700 MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
1702 bufptr[(*bufptr_i)++] = MB_TYPE(mbuf, i) & MODE_CHANOP ? 'o' : 'v';
1703 totalbuflen -= IRCD_MAX(9, tmp) + 1;
1705 } else if (MB_TYPE(mbuf, i) & (MODE_BAN | MODE_APASS | MODE_UPASS | MODE_ALTCHAN | MODE_NOFLOOD)) {
1706 tmp = strlen(MB_STRING(mbuf, i));
1708 if ((totalbuflen - tmp) <= 0) /* don't overflow buffer */
1709 MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
1712 switch(MB_TYPE(mbuf, i) & (MODE_BAN | MODE_APASS | MODE_UPASS | MODE_ALTCHAN | MODE_NOFLOOD))
1730 bufptr[(*bufptr_i)++] = mode_char;
1731 totalbuflen -= tmp + 1;
1733 } else if (MB_TYPE(mbuf, i) & MODE_KEY) {
1734 tmp = (mbuf->mb_dest & MODEBUF_DEST_NOKEY ? 1 :
1735 strlen(MB_STRING(mbuf, i)));
1737 if ((totalbuflen - tmp) <= 0) /* don't overflow buffer */
1738 MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
1740 bufptr[(*bufptr_i)++] = 'k';
1741 totalbuflen -= tmp + 1;
1743 } else if (MB_TYPE(mbuf, i) & (MODE_LIMIT)) {
1744 /* if it's a limit, we also format the number */
1745 ircd_snprintf(0, limitbuf, sizeof(limitbuf), "%u", MB_UINT(mbuf, i));
1747 tmp = strlen(limitbuf);
1749 if ((totalbuflen - tmp) <= 0) /* don't overflow buffer */
1750 MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
1752 bufptr[(*bufptr_i)++] = 'l';
1753 totalbuflen -= tmp + 1;
1755 } else if (MB_TYPE(mbuf, i) & (MODE_ACCESS)) {
1756 /* if it's a limit, we also format the number */
1757 ircd_snprintf(0, accessbuf, sizeof(accessbuf), "%u", MB_UINT(mbuf, i));
1759 tmp = strlen(accessbuf);
1761 if ((totalbuflen - tmp) <= 0) /* don't overflow buffer */
1762 MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
1764 bufptr[(*bufptr_i)++] = 'a';
1765 totalbuflen -= tmp + 1;
1770 /* terminate the mode strings */
1771 addbuf[addbuf_i] = '\0';
1772 rembuf[rembuf_i] = '\0';
1773 addbuf_local[addbuf_local_i] = '\0';
1774 rembuf_local[rembuf_local_i] = '\0';
1776 /* If we're building a user visible MODE or HACK... */
1777 if (mbuf->mb_dest & (MODEBUF_DEST_CHANNEL | MODEBUF_DEST_HACK2 |
1778 MODEBUF_DEST_HACK3 | MODEBUF_DEST_HACK4 |
1779 MODEBUF_DEST_LOG)) {
1780 /* Set up the parameter strings */
1786 for (i = 0; i < mbuf->mb_count; i++) {
1787 if (MB_TYPE(mbuf, i) & MODE_SAVE)
1790 if (MB_TYPE(mbuf, i) & MODE_ADD) { /* adding or removing? */
1792 strptr_i = &addstr_i;
1795 strptr_i = &remstr_i;
1798 /* deal with clients... */
1799 if (MB_TYPE(mbuf, i) & (MODE_CHANOP | MODE_VOICE))
1800 build_string(strptr, strptr_i, cli_name(MB_CLIENT(mbuf, i)), 0, ' ');
1802 /* deal with bans... */
1803 else if (MB_TYPE(mbuf, i) & (MODE_BAN))
1804 build_string(strptr, strptr_i, MB_STRING(mbuf, i), 0, ' ');
1806 /* deal with keys... */
1807 else if (MB_TYPE(mbuf, i) & MODE_KEY)
1808 build_string(strptr, strptr_i, mbuf->mb_dest & MODEBUF_DEST_NOKEY ?
1809 "*" : MB_STRING(mbuf, i), 0, ' ');
1811 /* deal with invisible passwords */
1812 else if (MB_TYPE(mbuf, i) & (MODE_APASS | MODE_UPASS))
1813 build_string(strptr, strptr_i, "*", 0, ' ');
1816 * deal with limit; note we cannot include the limit parameter if we're
1819 else if ((MB_TYPE(mbuf, i) & (MODE_ADD | MODE_LIMIT)) ==
1820 (MODE_ADD | MODE_LIMIT))
1821 build_string(strptr, strptr_i, limitbuf, 0, ' ');
1822 else if ((MB_TYPE(mbuf, i) & (MODE_ADD | MODE_ACCESS)) ==
1823 (MODE_ADD | MODE_ACCESS))
1824 build_string(strptr, strptr_i, accessbuf, 0, ' ');
1826 else if (MB_TYPE(mbuf, i) & MODE_ALTCHAN)
1827 build_string(strptr, strptr_i, MB_STRING(mbuf, i), 0, ' ');
1828 else if ((MB_TYPE(mbuf, i) & (MODE_ADD | MODE_NOFLOOD)) ==
1829 (MODE_ADD | MODE_NOFLOOD))
1830 build_string(strptr, strptr_i, MB_STRING(mbuf, i), 0, ' ');
1833 /* send the messages off to their destination */
1834 if (mbuf->mb_dest & MODEBUF_DEST_HACK2)
1835 sendto_opmask_butone(0, SNO_HACK2, "HACK(2): %s MODE %s %s%s%s%s%s%s "
1837 cli_name(feature_bool(FEAT_HIS_SNOTICES) ?
1838 mbuf->mb_source : app_source),
1839 mbuf->mb_channel->chname,
1840 rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
1841 addbuf, remstr, addstr,
1842 mbuf->mb_channel->creationtime);
1844 if (mbuf->mb_dest & MODEBUF_DEST_HACK3)
1845 sendto_opmask_butone(0, SNO_HACK3, "BOUNCE or HACK(3): %s MODE %s "
1846 "%s%s%s%s%s%s [%Tu]",
1847 cli_name(feature_bool(FEAT_HIS_SNOTICES) ?
1848 mbuf->mb_source : app_source),
1849 mbuf->mb_channel->chname, rembuf_i ? "-" : "",
1850 rembuf, addbuf_i ? "+" : "", addbuf, remstr, addstr,
1851 mbuf->mb_channel->creationtime);
1853 if (mbuf->mb_dest & MODEBUF_DEST_HACK4)
1854 sendto_opmask_butone(0, SNO_HACK4, "HACK(4): %s MODE %s %s%s%s%s%s%s "
1856 cli_name(feature_bool(FEAT_HIS_SNOTICES) ?
1857 mbuf->mb_source : app_source),
1858 mbuf->mb_channel->chname,
1859 rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
1860 addbuf, remstr, addstr,
1861 mbuf->mb_channel->creationtime);
1863 if (mbuf->mb_dest & MODEBUF_DEST_LOG)
1864 log_write(LS_OPERMODE, L_INFO, LOG_NOSNOTICE,
1865 "%#C OPMODE %H %s%s%s%s%s%s", mbuf->mb_source,
1866 mbuf->mb_channel, rembuf_i ? "-" : "", rembuf,
1867 addbuf_i ? "+" : "", addbuf, remstr, addstr);
1869 if (mbuf->mb_dest & MODEBUF_DEST_CHANNEL)
1870 sendcmdto_channel_butserv_butone(app_source, CMD_MODE, mbuf->mb_channel, NULL, 0,
1871 "%H %s%s%s%s%s%s%s%s", mbuf->mb_channel,
1872 rembuf_i || rembuf_local_i ? "-" : "",
1873 rembuf, rembuf_local,
1874 addbuf_i || addbuf_local_i ? "+" : "",
1875 addbuf, addbuf_local,
1879 /* Now are we supposed to propagate to other servers? */
1880 if (mbuf->mb_dest & MODEBUF_DEST_SERVER) {
1881 /* set up parameter string */
1888 * limit is supressed if we're removing it; we have to figure out which
1889 * direction is the direction for it to be removed, though...
1891 limitdel |= (mbuf->mb_dest & MODEBUF_DEST_BOUNCE) ? MODE_DEL : MODE_ADD;
1892 accessdel |= (mbuf->mb_dest & MODEBUF_DEST_BOUNCE) ? MODE_DEL : MODE_ADD;
1894 for (i = 0; i < mbuf->mb_count; i++) {
1895 if (MB_TYPE(mbuf, i) & MODE_SAVE)
1898 if (MB_TYPE(mbuf, i) & MODE_ADD) { /* adding or removing? */
1900 strptr_i = &addstr_i;
1903 strptr_i = &remstr_i;
1906 /* if we're changing oplevels and we know the oplevel, pass it on */
1907 if ((MB_TYPE(mbuf, i) & MODE_CHANOP)
1908 && MB_OPLEVEL(mbuf, i) < MAXOPLEVEL)
1909 *strptr_i += ircd_snprintf(0, strptr + *strptr_i, BUFSIZE - *strptr_i,
1911 NumNick(MB_CLIENT(mbuf, i)),
1912 MB_OPLEVEL(mbuf, i));
1914 /* deal with other modes that take clients */
1915 else if (MB_TYPE(mbuf, i) & (MODE_CHANOP | MODE_VOICE))
1916 build_string(strptr, strptr_i, NumNick(MB_CLIENT(mbuf, i)), ' ');
1918 /* deal with modes that take strings */
1919 else if (MB_TYPE(mbuf, i) & (MODE_KEY | MODE_BAN | MODE_APASS | MODE_UPASS | MODE_ALTCHAN | MODE_NOFLOOD))
1920 build_string(strptr, strptr_i, MB_STRING(mbuf, i), 0, ' ');
1923 * deal with the limit. Logic here is complicated; if HACK2 is set,
1924 * we're bouncing the mode, so sense is reversed, and we have to
1925 * include the original limit if it looks like it's being removed
1927 else if ((MB_TYPE(mbuf, i) & limitdel) == limitdel)
1928 build_string(strptr, strptr_i, limitbuf, 0, ' ');
1929 else if ((MB_TYPE(mbuf, i) & accessdel) == accessdel)
1930 build_string(strptr, strptr_i, accessbuf, 0, ' ');
1933 /* we were told to deop the source */
1934 if (mbuf->mb_dest & MODEBUF_DEST_DEOP) {
1935 addbuf[addbuf_i++] = 'o'; /* remember, sense is reversed */
1936 addbuf[addbuf_i] = '\0'; /* terminate the string... */
1937 build_string(addstr, &addstr_i, NumNick(mbuf->mb_source), ' ');
1939 /* mark that we've done this, so we don't do it again */
1940 mbuf->mb_dest &= ~MODEBUF_DEST_DEOP;
1943 if (mbuf->mb_dest & MODEBUF_DEST_OPMODE) {
1944 /* If OPMODE was set, we're propagating the mode as an OPMODE message */
1945 sendcmdto_serv_butone(mbuf->mb_source, CMD_OPMODE, mbuf->mb_connect,
1946 "%H %s%s%s%s%s%s", mbuf->mb_channel,
1947 rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
1948 addbuf, remstr, addstr);
1949 } else if (mbuf->mb_dest & MODEBUF_DEST_BOUNCE) {
1951 * If HACK2 was set, we're bouncing; we send the MODE back to
1952 * the connection we got it from with the senses reversed and
1953 * the proper TS; origin is us
1955 sendcmdto_one(&me, CMD_MODE, mbuf->mb_connect, "%H %s%s%s%s%s%s %Tu",
1956 mbuf->mb_channel, addbuf_i ? "-" : "", addbuf,
1957 rembuf_i ? "+" : "", rembuf, addstr, remstr,
1958 mbuf->mb_channel->creationtime);
1961 * We're propagating a normal (or HACK3 or HACK4) MODE command
1962 * to the rest of the network. We send the actual channel TS.
1964 sendcmdto_serv_butone(mbuf->mb_source, CMD_MODE, mbuf->mb_connect,
1965 "%H %s%s%s%s%s%s %Tu", mbuf->mb_channel,
1966 rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
1967 addbuf, remstr, addstr,
1968 mbuf->mb_channel->creationtime);
1972 /* We've drained the ModeBuf... */
1977 /* reinitialize the mode-with-arg slots */
1978 for (i = 0; i < MAXMODEPARAMS; i++) {
1979 /* If we saved any, pack them down */
1980 if (MB_TYPE(mbuf, i) & MODE_SAVE) {
1981 mbuf->mb_modeargs[mbuf->mb_count] = mbuf->mb_modeargs[i];
1982 MB_TYPE(mbuf, mbuf->mb_count) &= ~MODE_SAVE; /* don't save anymore */
1984 if (mbuf->mb_count++ == i) /* don't overwrite our hard work */
1986 } else if (MB_TYPE(mbuf, i) & MODE_FREE)
1987 MyFree(MB_STRING(mbuf, i)); /* free string if needed */
1989 MB_TYPE(mbuf, i) = 0;
1990 MB_UINT(mbuf, i) = 0;
1993 /* If we're supposed to flush it all, do so--all hail tail recursion */
1994 if (all && mbuf->mb_count)
1995 return modebuf_flush_int(mbuf, 1);
2000 /** Initialise a modebuf
2001 * This routine just initializes a ModeBuf structure with the information
2002 * needed and the options given.
2004 * @param mbuf The mode buffer to initialise.
2005 * @param source The client that is performing the mode.
2007 * @param chan The channel that the mode is being performed upon.
2011 modebuf_init(struct ModeBuf *mbuf, struct Client *source,
2012 struct Client *connect, struct Channel *chan, unsigned int dest)
2017 assert(0 != source);
2021 if (IsLocalChannel(chan->chname)) dest &= ~MODEBUF_DEST_SERVER;
2025 mbuf->mb_source = source;
2026 mbuf->mb_connect = connect;
2027 mbuf->mb_channel = chan;
2028 mbuf->mb_dest = dest;
2031 /* clear each mode-with-parameter slot */
2032 for (i = 0; i < MAXMODEPARAMS; i++) {
2033 MB_TYPE(mbuf, i) = 0;
2034 MB_UINT(mbuf, i) = 0;
2038 /** Append a new mode to a modebuf
2039 * This routine simply adds modes to be added or deleted; do a binary OR
2040 * with either MODE_ADD or MODE_DEL
2042 * @param mbuf Mode buffer
2043 * @param mode MODE_ADD or MODE_DEL OR'd with MODE_PRIVATE etc.
2046 modebuf_mode(struct ModeBuf *mbuf, ulong64 mode)
2049 assert(0 != (mode & (MODE_ADD | MODE_DEL)));
2051 mode &= (MODE_ADD | MODE_DEL | MODE_PRIVATE | MODE_SECRET | MODE_MODERATED |
2052 MODE_TOPICLIMIT | MODE_INVITEONLY | MODE_NOPRIVMSGS | MODE_REGONLY |
2053 MODE_DELJOINS | MODE_WASDELJOINS | MODE_REGISTERED | MODE_PERSIST |
2054 MODE_NOCOLOUR | MODE_NOCTCP | MODE_NOAMSGS | MODE_NONOTICE |
2055 MODE_QUARANTINE | MODE_AUDITORIUM | MODE_SSLCHAN);
2057 if (!(mode & ~(MODE_ADD | MODE_DEL))) /* don't add empty modes... */
2060 if (mode & MODE_ADD) {
2061 mbuf->mb_rem &= ~mode;
2062 mbuf->mb_add |= mode;
2064 mbuf->mb_add &= ~mode;
2065 mbuf->mb_rem |= mode;
2069 /** Append a mode that takes an ulong64 argument to the modebuf
2071 * This routine adds a mode to be added or deleted that takes a unsigned
2072 * ulong64 parameter; mode may *only* be the relevant mode flag ORed with one
2073 * of MODE_ADD or MODE_DEL
2075 * @param mbuf The mode buffer to append to.
2076 * @param mode The mode to append.
2077 * @param uint The argument to the mode.
2080 modebuf_mode_uint(struct ModeBuf *mbuf, ulong64 mode, unsigned int uint)
2083 assert(0 != (mode & (MODE_ADD | MODE_DEL)));
2085 if (mode == (MODE_LIMIT | MODE_DEL)) {
2086 mbuf->mb_rem |= mode;
2089 if (mode == (MODE_ACCESS | MODE_DEL)) {
2090 mbuf->mb_rem |= mode;
2093 MB_TYPE(mbuf, mbuf->mb_count) = mode;
2094 MB_UINT(mbuf, mbuf->mb_count) = uint;
2096 /* when we've reached the maximal count, flush the buffer */
2097 if (++mbuf->mb_count >=
2098 (MAXMODEPARAMS - (mbuf->mb_dest & MODEBUF_DEST_DEOP ? 1 : 0)))
2099 modebuf_flush_int(mbuf, 0);
2102 /** append a string mode
2103 * This routine adds a mode to be added or deleted that takes a string
2104 * parameter; mode may *only* be the relevant mode flag ORed with one of
2105 * MODE_ADD or MODE_DEL
2107 * @param mbuf The mode buffer to append to.
2108 * @param mode The mode to append.
2109 * @param string The string parameter to append.
2110 * @param free If the string should be free'd later.
2113 modebuf_mode_string(struct ModeBuf *mbuf, ulong64 mode, char *string,
2117 assert(0 != (mode & (MODE_ADD | MODE_DEL)));
2119 MB_TYPE(mbuf, mbuf->mb_count) = mode | (free ? MODE_FREE : 0);
2120 MB_STRING(mbuf, mbuf->mb_count) = string;
2122 /* when we've reached the maximal count, flush the buffer */
2123 if (++mbuf->mb_count >=
2124 (MAXMODEPARAMS - (mbuf->mb_dest & MODEBUF_DEST_DEOP ? 1 : 0)))
2125 modebuf_flush_int(mbuf, 0);
2128 /** Append a mode on a client to a modebuf.
2129 * This routine adds a mode to be added or deleted that takes a client
2130 * parameter; mode may *only* be the relevant mode flag ORed with one of
2131 * MODE_ADD or MODE_DEL
2133 * @param mbuf The modebuf to append the mode to.
2134 * @param mode The mode to append.
2135 * @param client The client argument to append.
2136 * @param oplevel The oplevel the user had or will have
2139 modebuf_mode_client(struct ModeBuf *mbuf, ulong64 mode,
2140 struct Client *client, int oplevel)
2143 assert(0 != (mode & (MODE_ADD | MODE_DEL)));
2145 MB_TYPE(mbuf, mbuf->mb_count) = mode;
2146 MB_CLIENT(mbuf, mbuf->mb_count) = client;
2147 MB_OPLEVEL(mbuf, mbuf->mb_count) = oplevel;
2149 /* when we've reached the maximal count, flush the buffer */
2150 if (++mbuf->mb_count >=
2151 (MAXMODEPARAMS - (mbuf->mb_dest & MODEBUF_DEST_DEOP ? 1 : 0)))
2152 modebuf_flush_int(mbuf, 0);
2155 /** Check a channel for join-delayed members.
2156 * @param[in] chan Channel to search.
2157 * @return Non-zero if any members are join-delayed; false if none are.
2160 find_delayed_joins(const struct Channel *chan)
2162 const struct Membership *memb;
2163 for (memb = chan->members; memb; memb = memb->next_member)
2164 if (IsDelayedJoin(memb) && !IsInvisibleJoin(memb))
2169 /** The exported binding for modebuf_flush()
2171 * @param mbuf The mode buffer to flush.
2173 * @see modebuf_flush_int()
2176 modebuf_flush(struct ModeBuf *mbuf)
2178 /* Check if MODE_WASDELJOINS should be set: */
2179 /* Must be set if going -D and some clients are hidden */
2180 if ((mbuf->mb_rem & MODE_DELJOINS)
2181 && !(mbuf->mb_channel->mode.mode & (MODE_DELJOINS | MODE_WASDELJOINS))
2182 && find_delayed_joins(mbuf->mb_channel)) {
2183 mbuf->mb_channel->mode.mode |= MODE_WASDELJOINS;
2184 mbuf->mb_add |= MODE_WASDELJOINS;
2185 mbuf->mb_rem &= ~MODE_WASDELJOINS;
2187 /* Must be cleared if +D is set */
2188 if ((mbuf->mb_add & MODE_DELJOINS)
2189 && ((mbuf->mb_channel->mode.mode & (MODE_WASDELJOINS | MODE_WASDELJOINS))
2190 == (MODE_WASDELJOINS | MODE_WASDELJOINS))) {
2191 mbuf->mb_channel->mode.mode &= ~MODE_WASDELJOINS;
2192 mbuf->mb_add &= ~MODE_WASDELJOINS;
2193 mbuf->mb_rem |= MODE_WASDELJOINS;
2196 return modebuf_flush_int(mbuf, 1);
2199 /* This extracts the simple modes contained in mbuf
2201 * @param mbuf The mode buffer to extract the modes from.
2202 * @param buf The string buffer to write the modes into.
2205 modebuf_extract(struct ModeBuf *mbuf, char *buf)
2207 static ulong64 flags[] = {
2208 /* MODE_CHANOP, 'o', */
2209 /* MODE_VOICE, 'v', */
2212 MODE_MODERATED, 'm',
2213 MODE_TOPICLIMIT, 't',
2214 MODE_INVITEONLY, 'i',
2215 MODE_NOPRIVMSGS, 'n',
2219 MODE_REGISTERED, 'R',
2220 /* MODE_BAN, 'b', */
2229 MODE_QUARANTINE, 'Q',
2232 MODE_AUDITORIUM, 'u',
2238 int i, bufpos = 0, len;
2240 char *key = 0, limitbuf[20], accessbuf[20];
2241 char *apass = 0, *upass = 0, *altchan = 0, *noflood = 0;
2250 for (i = 0; i < mbuf->mb_count; i++) { /* find keys and limits */
2251 if (MB_TYPE(mbuf, i) & MODE_ADD) {
2252 add |= MB_TYPE(mbuf, i) & (MODE_KEY | MODE_LIMIT | MODE_APASS | MODE_UPASS | MODE_ALTCHAN | MODE_ACCESS | MODE_NOFLOOD);
2254 if (MB_TYPE(mbuf, i) & MODE_KEY) /* keep strings */
2255 key = MB_STRING(mbuf, i);
2256 else if (MB_TYPE(mbuf, i) & MODE_LIMIT)
2257 ircd_snprintf(0, limitbuf, sizeof(limitbuf), "%u", MB_UINT(mbuf, i));
2258 else if (MB_TYPE(mbuf, i) & MODE_ACCESS)
2259 ircd_snprintf(0, accessbuf, sizeof(accessbuf), "%u", MB_UINT(mbuf, i));
2260 else if (MB_TYPE(mbuf, i) & MODE_UPASS)
2261 upass = MB_STRING(mbuf, i);
2262 else if (MB_TYPE(mbuf, i) & MODE_APASS)
2263 apass = MB_STRING(mbuf, i);
2264 else if (MB_TYPE(mbuf, i) & MODE_ALTCHAN)
2265 altchan = MB_STRING(mbuf, i);
2266 else if (MB_TYPE(mbuf, i) & MODE_NOFLOOD)
2267 noflood = MB_STRING(mbuf, i);
2274 buf[bufpos++] = '+'; /* start building buffer */
2276 for (flag_p = flags; flag_p[0]; flag_p += 2)
2278 buf[bufpos++] = flag_p[1];
2280 for (i = 0, len = bufpos; i < len; i++) {
2282 build_string(buf, &bufpos, key, 0, ' ');
2283 else if (buf[i] == 'l')
2284 build_string(buf, &bufpos, limitbuf, 0, ' ');
2285 else if (buf[i] == 'a')
2286 build_string(buf, &bufpos, accessbuf, 0, ' ');
2287 else if (buf[i] == 'U')
2288 build_string(buf, &bufpos, upass, 0, ' ');
2289 else if (buf[i] == 'A')
2290 build_string(buf, &bufpos, apass, 0, ' ');
2291 else if (buf[i] == 'F')
2292 build_string(buf, &bufpos, altchan, 0, ' ');
2293 else if (buf[i] == 'f')
2294 build_string(buf, &bufpos, noflood, 0, ' ');
2302 /** Simple function to invalidate a channel's ban cache.
2304 * This function marks all members of the channel as being neither
2305 * banned nor banned.
2307 * @param chan The channel to operate on.
2310 mode_ban_invalidate(struct Channel *chan)
2312 struct Membership *member;
2314 for (member = chan->members; member; member = member->next_member)
2315 ClearBanValid(member);
2318 /** Simple function to drop invite structures
2320 * Remove all the invites on the channel.
2322 * @param chan Channel to remove invites from.
2326 mode_invite_clear(struct Channel *chan)
2328 while (chan->invites)
2329 del_invite(chan->invites->value.cptr, chan);
2332 /* What we've done for mode_parse so far... */
2333 #define DONE_LIMIT 0x01 /**< We've set the limit */
2334 #define DONE_KEY_ADD 0x02 /**< We've set the key */
2335 #define DONE_BANLIST 0x04 /**< We've sent the ban list */
2336 #define DONE_NOTOPER 0x08 /**< We've sent a "Not oper" error */
2337 #define DONE_BANCLEAN 0x10 /**< We've cleaned bans... */
2338 #define DONE_UPASS_ADD 0x20 /**< We've set user pass */
2339 #define DONE_APASS_ADD 0x40 /**< We've set admin pass */
2340 #define DONE_KEY_DEL 0x80 /**< We've removed the key */
2341 #define DONE_UPASS_DEL 0x100 /**< We've removed the user pass */
2342 #define DONE_APASS_DEL 0x200 /**< We've removed the admin pass */
2343 #define DONE_ALTCHAN 0x800 /**< We've set the altchan */
2344 #define DONE_ACCESS 0x1000 /**< We've set the access */
2345 #define DONE_NOFLOOD 0x2000 /**< We've set the noflood options */
2348 struct ModeBuf *mbuf;
2349 struct Client *cptr;
2350 struct Client *sptr;
2351 struct Channel *chptr;
2352 struct Membership *member;
2363 struct Ban banlist[MAXPARA];
2366 unsigned short oplevel;
2367 struct Client *client;
2368 } cli_change[MAXPARA];
2371 /** Helper function to send "Not oper" or "Not member" messages
2372 * Here's a helper function to deal with sending along "Not oper" or
2373 * "Not member" messages
2375 * @param state Parsing State object
2378 send_notoper(struct ParseState *state)
2380 if (state->done & DONE_NOTOPER)
2383 send_reply(state->sptr, (state->flags & MODE_PARSE_NOTOPER) ?
2384 ERR_CHANOPRIVSNEEDED : ERR_NOTONCHANNEL, state->chptr->chname);
2386 state->done |= DONE_NOTOPER;
2390 * Helper function to convert limits
2392 * @param state Parsing state object.
2396 mode_parse_limit(struct ParseState *state, ulong64 *flag_p)
2398 unsigned int t_limit;
2400 if (state->dir == MODE_ADD) { /* convert arg only if adding limit */
2401 if (MyUser(state->sptr) && state->max_args <= 0) /* too many args? */
2404 if (state->parc <= 0) { /* warn if not enough args */
2405 if (MyUser(state->sptr))
2406 need_more_params(state->sptr, "MODE +l");
2410 t_limit = strtoul(state->parv[state->args_used++], 0, 10); /* grab arg */
2414 if ((int)t_limit<0) /* don't permit a negative limit */
2417 if (!(state->flags & MODE_PARSE_WIPEOUT) &&
2418 (!t_limit || t_limit == state->chptr->mode.limit))
2421 t_limit = state->chptr->mode.limit;
2423 /* If they're not an oper, they can't change modes */
2424 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2425 send_notoper(state);
2429 /* Can't remove a limit that's not there */
2430 if (state->dir == MODE_DEL && !state->chptr->mode.limit)
2433 /* Skip if this is a burst and a lower limit than this is set already */
2434 if ((state->flags & MODE_PARSE_BURST) &&
2435 (state->chptr->mode.mode & flag_p[0]) &&
2436 (state->chptr->mode.limit < t_limit))
2439 if (state->done & DONE_LIMIT) /* allow limit to be set only once */
2441 state->done |= DONE_LIMIT;
2446 modebuf_mode_uint(state->mbuf, state->dir | flag_p[0], t_limit);
2448 if (state->flags & MODE_PARSE_SET) { /* set the limit */
2449 if (state->dir & MODE_ADD) {
2450 state->chptr->mode.mode |= flag_p[0];
2451 state->chptr->mode.limit = t_limit;
2453 state->chptr->mode.mode &= ~flag_p[0];
2454 state->chptr->mode.limit = 0;
2461 mode_parse_access(struct ParseState *state, ulong64 *flag_p)
2463 unsigned int t_access;
2465 if (state->dir == MODE_ADD) { /* convert arg only if adding access */
2466 if (MyUser(state->sptr) && state->max_args <= 0) /* too many args? */
2469 if (state->parc <= 0) { /* warn if not enough args */
2470 if (MyUser(state->sptr))
2471 need_more_params(state->sptr, "MODE +a");
2475 t_access = strtoul(state->parv[state->args_used++], 0, 10); /* grab arg */
2479 if ((int)t_access<1 || (int)t_access>500) /* don't permit a negative access or an access over 500 */
2482 if (!feature_bool(FEAT_CHMODE_A_ENABLE)) { /* don't parse MODE_ACCESS if it's disabled */
2483 if (MyUser(state->sptr)) {
2485 send_reply(state->sptr, ERR_UNKNOWNMODE, mode[0]);
2490 if (!(state->flags & MODE_PARSE_WIPEOUT) &&
2491 (!t_access || t_access == state->chptr->mode.access))
2494 t_access = state->chptr->mode.access;
2496 /* If they're not an oper, they can't change modes */
2497 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2498 send_notoper(state);
2502 /* Can't remove an access that's not there */
2503 if (state->dir == MODE_DEL && !state->chptr->mode.access)
2506 /* Skip if this is a burst and a higher access than this is set already */
2507 if ((state->flags & MODE_PARSE_BURST) &&
2508 (state->chptr->mode.mode & flag_p[0]) &&
2509 (state->chptr->mode.access > t_access))
2512 if (state->done & DONE_ACCESS) /* allow access to be set only once */
2514 state->done |= DONE_ACCESS;
2519 modebuf_mode_uint(state->mbuf, state->dir | flag_p[0], t_access);
2521 if (state->flags & MODE_PARSE_SET) { /* set the access */
2522 if (state->dir & MODE_ADD) {
2523 state->chptr->mode.mode |= flag_p[0];
2524 state->chptr->mode.access = t_access;
2526 state->chptr->mode.mode &= ~flag_p[0];
2527 state->chptr->mode.access = 0;
2534 mode_parse_altchan(struct ParseState *state, ulong64 *flag_p)
2538 if (state->dir == MODE_ADD) { /* convert arg only if adding altchan */
2539 if (MyUser(state->sptr) && state->max_args <= 0) /* too many args? */
2542 if (!feature_bool(FEAT_CHMODE_F_ENABLE))
2545 if (state->parc <= 0) { /* warn if not enough args */
2546 if (MyUser(state->sptr))
2547 need_more_params(state->sptr, "MODE +F");
2551 t_str = state->parv[state->args_used++]; /* grab arg */
2555 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! */
2558 if(!(state->flags & MODE_PARSE_FORCE)) {
2559 struct Channel *chptr;
2560 struct Membership *member;
2561 if (!(chptr = FindChannel(t_str)))
2563 if(!(member = find_member_link(chptr, state->sptr)))
2565 if(!IsChanOp(member)) {
2566 send_notoper(state);
2571 if (!(state->flags & MODE_PARSE_WIPEOUT) &&
2572 (!t_str || t_str == state->chptr->mode.altchan))
2575 t_str = state->chptr->mode.altchan;
2577 /* If they're not an oper, they can't change modes */
2578 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2579 send_notoper(state);
2583 /* Can't remove a altchan that's not there */
2584 if (state->dir == MODE_DEL && !*state->chptr->mode.altchan)
2587 /* Skip if this is a burst and a lower altchan than this is set already */
2588 if ((state->flags & MODE_PARSE_BURST) &&
2589 *(state->chptr->mode.altchan))
2592 if (state->done & DONE_ALTCHAN) /* allow altchan to be set only once */
2594 state->done |= DONE_ALTCHAN;
2599 if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
2600 !ircd_strcmp(state->chptr->mode.altchan, t_str))
2601 return; /* no change */
2603 if (state->flags & MODE_PARSE_BOUNCE) {
2604 if (*state->chptr->mode.altchan) /* reset old altchan */
2605 modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0], state->chptr->mode.altchan, 0);
2606 else /* remove new bogus altchan */
2607 modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
2608 } else /* send new altchan */
2609 modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
2611 if (state->flags & MODE_PARSE_SET) {
2612 if (state->dir == MODE_DEL) { /* remove the old altchan */
2613 *state->chptr->mode.altchan = '\0';
2614 state->chptr->mode.mode &= ~flag_p[0];
2616 ircd_strncpy(state->chptr->mode.altchan, t_str, CHANNELLEN);
2617 state->chptr->mode.mode |= flag_p[0];
2623 mode_parse_noflood(struct ParseState *state, ulong64 *flag_p)
2627 unsigned int count = 0, time = 0, flags = 0;
2629 if (state->dir == MODE_ADD) { /* convert arg only if adding noflood */
2630 if (MyUser(state->sptr) && state->max_args <= 0) /* too many args? */
2633 if (state->parc <= 0) { /* warn if not enough args */
2634 if (MyUser(state->sptr))
2635 need_more_params(state->sptr, "MODE +f");
2639 t_str = state->parv[state->args_used++]; /* grab arg */
2646 if(state->flags & MODE_PARSE_FORCE) flags |= FLFL_NOFLOOD;
2647 else t_str++; //simply ignore if it's not an opmode
2650 if(tmp[0] == '+' || tmp[0] == '@') {
2651 if(tmp[0] == '+') flags |= FLFL_VOICE;
2652 if(tmp[0] == '@') flags |= FLFL_CHANOP;
2656 for(p = tmp; p[0]; p++) {
2658 char tmpchar = p[0];
2660 count = strtoul(tmp,0,10);
2663 time = strtoul(p,0,10);
2667 if(count <= 0 || time <= 0 || count > 100 || time > 600) return;
2669 if (!(state->flags & MODE_PARSE_WIPEOUT) &&
2670 (!t_str || t_str == state->chptr->mode.noflood))
2673 t_str = state->chptr->mode.noflood;
2675 /* If they're not an oper, they can't change modes */
2676 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2677 send_notoper(state);
2681 /* Can't remove a noflood that's not there */
2682 if (state->dir == MODE_DEL && !*state->chptr->mode.noflood)
2685 /* Skip if this is a burst and a lower noflood than this is set already */
2686 if ((state->flags & MODE_PARSE_BURST) &&
2687 *(state->chptr->mode.noflood))
2690 if (state->done & DONE_NOFLOOD) /* allow noflood to be set only once */
2692 state->done |= DONE_NOFLOOD;
2697 if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
2698 !ircd_strcmp(state->chptr->mode.noflood, t_str))
2699 return; /* no change */
2701 if (state->flags & MODE_PARSE_BOUNCE) {
2702 if (*state->chptr->mode.noflood) /* reset old noflood */
2703 modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0], state->chptr->mode.noflood, 0);
2704 else /* remove new bogus noflood */
2705 modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
2706 } else /* send new noflood */
2707 modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
2709 if (state->flags & MODE_PARSE_SET) {
2710 if (state->dir == MODE_DEL) { /* remove the old noflood */
2711 *state->chptr->mode.noflood = '\0';
2712 state->chptr->mode.mode &= ~flag_p[0];
2714 ircd_strncpy(state->chptr->mode.noflood, t_str, CHANNELLEN);
2715 state->chptr->mode.mode |= flag_p[0];
2719 if (state->dir == MODE_ADD) {
2720 unsigned int noflood_value = time;
2721 noflood_value <<= 10;
2722 noflood_value |= count;
2723 noflood_value <<= 3;
2724 noflood_value |= flags;
2725 state->chptr->mode.noflood_value = noflood_value;
2727 //removed the mode so free all flood objects
2728 state->chptr->mode.noflood_value = 0;
2729 struct Membership *member;
2730 for(member = state->chptr->members; member; member = member->next_member) {
2731 struct MemberFlood *floodnode;
2732 for(floodnode = member->flood;floodnode ; floodnode = floodnode->next_memberflood) {
2733 if(floodnode->next_memberflood == NULL) break;
2734 } //simply walk to the end
2735 if(!floodnode) continue;
2736 floodnode->next_memberflood = free_MemberFlood;
2737 free_MemberFlood = floodnode;
2738 member->flood = NULL;
2744 mode_parse_quarantine(struct ParseState *state, ulong64 *flag_p)
2749 /** Helper function to validate key-like parameters.
2751 * @param[in] state Parse state for feedback to user.
2752 * @param[in] s Key to validate.
2753 * @param[in] command String to pass for need_more_params() command.
2754 * @return Zero on an invalid key, non-zero if the key was okay.
2757 is_clean_key(struct ParseState *state, char *s, char *command)
2762 if (MyUser(state->sptr))
2763 need_more_params(state->sptr, command);
2766 else if (s[0] == ':') {
2767 if (MyUser(state->sptr))
2768 send_reply(state->sptr, ERR_INVALIDKEY, state->chptr->chname);
2771 for (ii = 0; (ii <= KEYLEN) && (s[ii] != '\0'); ++ii) {
2772 if ((unsigned char)s[ii] <= ' ' || s[ii] == ',') {
2773 if (MyUser(state->sptr))
2774 send_reply(state->sptr, ERR_INVALIDKEY, state->chptr->chname);
2779 if (MyUser(state->sptr))
2780 send_reply(state->sptr, ERR_INVALIDKEY, state->chptr->chname);
2787 * Helper function to convert keys
2790 mode_parse_key(struct ParseState *state, ulong64 *flag_p)
2794 if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
2797 if (state->parc <= 0) { /* warn if not enough args */
2798 if (MyUser(state->sptr))
2799 need_more_params(state->sptr, state->dir == MODE_ADD ? "MODE +k" :
2804 t_str = state->parv[state->args_used++]; /* grab arg */
2808 /* If they're not an oper, they can't change modes */
2809 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2810 send_notoper(state);
2814 /* allow removing and then adding key, but not adding and then removing */
2815 if (state->dir == MODE_ADD)
2817 if (state->done & DONE_KEY_ADD)
2819 state->done |= DONE_KEY_ADD;
2823 if (state->done & (DONE_KEY_ADD | DONE_KEY_DEL))
2825 state->done |= DONE_KEY_DEL;
2828 /* If the key is invalid, tell the user and bail. */
2829 if (!is_clean_key(state, t_str, state->dir == MODE_ADD ? "MODE +k" :
2836 /* Skip if this is a burst, we have a key already and the new key is
2837 * after the old one alphabetically */
2838 if ((state->flags & MODE_PARSE_BURST) &&
2839 *(state->chptr->mode.key) &&
2840 ircd_strcmp(state->chptr->mode.key, t_str) <= 0)
2843 /* can't add a key if one is set, nor can one remove the wrong key */
2844 if (!(state->flags & MODE_PARSE_FORCE))
2845 if ((state->dir == MODE_ADD && *state->chptr->mode.key) ||
2846 (state->dir == MODE_DEL &&
2847 ircd_strcmp(state->chptr->mode.key, t_str))) {
2848 send_reply(state->sptr, ERR_KEYSET, state->chptr->chname);
2852 if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
2853 !ircd_strcmp(state->chptr->mode.key, t_str))
2854 return; /* no key change */
2856 if (state->flags & MODE_PARSE_BOUNCE) {
2857 if (*state->chptr->mode.key) /* reset old key */
2858 modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0],
2859 state->chptr->mode.key, 0);
2860 else /* remove new bogus key */
2861 modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
2862 } else /* send new key */
2863 modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
2865 if (state->flags & MODE_PARSE_SET) {
2866 if (state->dir == MODE_DEL) /* remove the old key */
2867 *state->chptr->mode.key = '\0';
2869 ircd_strncpy(state->chptr->mode.key, t_str, KEYLEN);
2874 * Helper function to convert user passes
2877 mode_parse_upass(struct ParseState *state, ulong64 *flag_p)
2881 if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
2884 if (state->parc <= 0) { /* warn if not enough args */
2885 if (MyUser(state->sptr))
2886 need_more_params(state->sptr, state->dir == MODE_ADD ? "MODE +U" :
2891 t_str = state->parv[state->args_used++]; /* grab arg */
2895 /* If they're not an oper, they can't change modes */
2896 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2897 send_notoper(state);
2901 /* If a non-service user is trying to force it, refuse. */
2902 if (state->flags & MODE_PARSE_FORCE && MyUser(state->sptr)
2903 && !HasPriv(state->sptr, PRIV_APASS_OPMODE)) {
2904 send_reply(state->sptr, ERR_NOTMANAGER, state->chptr->chname,
2905 state->chptr->chname);
2909 /* If they are not the channel manager, they are not allowed to change it */
2910 if (MyUser(state->sptr) && !(state->flags & MODE_PARSE_FORCE || IsChannelManager(state->member))) {
2911 if (*state->chptr->mode.apass) {
2912 send_reply(state->sptr, ERR_NOTMANAGER, state->chptr->chname,
2913 state->chptr->chname);
2915 send_reply(state->sptr, ERR_NOMANAGER, state->chptr->chname,
2916 (TStime() - state->chptr->creationtime < 172800) ?
2917 "approximately 4-5 minutes" : "approximately 48 hours");
2922 /* allow removing and then adding upass, but not adding and then removing */
2923 if (state->dir == MODE_ADD)
2925 if (state->done & DONE_UPASS_ADD)
2927 state->done |= DONE_UPASS_ADD;
2931 if (state->done & (DONE_UPASS_ADD | DONE_UPASS_DEL))
2933 state->done |= DONE_UPASS_DEL;
2936 /* If the Upass is invalid, tell the user and bail. */
2937 if (!is_clean_key(state, t_str, state->dir == MODE_ADD ? "MODE +U" :
2944 if (!(state->flags & MODE_PARSE_FORCE)) {
2945 /* can't add the upass while apass is not set */
2946 if (state->dir == MODE_ADD && !*state->chptr->mode.apass) {
2947 send_reply(state->sptr, ERR_UPASSNOTSET, state->chptr->chname, state->chptr->chname);
2950 /* cannot set a +U password that is the same as +A */
2951 if (state->dir == MODE_ADD && !ircd_strcmp(state->chptr->mode.apass, t_str)) {
2952 send_reply(state->sptr, ERR_UPASS_SAME_APASS, state->chptr->chname);
2955 /* can't add a upass if one is set, nor can one remove the wrong upass */
2956 if ((state->dir == MODE_ADD && *state->chptr->mode.upass) ||
2957 (state->dir == MODE_DEL &&
2958 ircd_strcmp(state->chptr->mode.upass, t_str))) {
2959 send_reply(state->sptr, ERR_KEYSET, state->chptr->chname);
2964 if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
2965 !ircd_strcmp(state->chptr->mode.upass, t_str))
2966 return; /* no upass change */
2968 /* Skip if this is a burst, we have a Upass already and the new Upass is
2969 * after the old one alphabetically */
2970 if ((state->flags & MODE_PARSE_BURST) &&
2971 *(state->chptr->mode.upass) &&
2972 ircd_strcmp(state->chptr->mode.upass, t_str) <= 0)
2975 if (state->flags & MODE_PARSE_BOUNCE) {
2976 if (*state->chptr->mode.upass) /* reset old upass */
2977 modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0],
2978 state->chptr->mode.upass, 0);
2979 else /* remove new bogus upass */
2980 modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
2981 } else /* send new upass */
2982 modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
2984 if (state->flags & MODE_PARSE_SET) {
2985 if (state->dir == MODE_DEL) /* remove the old upass */
2986 *state->chptr->mode.upass = '\0';
2988 ircd_strncpy(state->chptr->mode.upass, t_str, KEYLEN);
2993 * Helper function to convert admin passes
2996 mode_parse_apass(struct ParseState *state, ulong64 *flag_p)
2998 struct Membership *memb;
3001 if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
3004 if (state->parc <= 0) { /* warn if not enough args */
3005 if (MyUser(state->sptr))
3006 need_more_params(state->sptr, state->dir == MODE_ADD ? "MODE +A" :
3011 t_str = state->parv[state->args_used++]; /* grab arg */
3015 /* If they're not an oper, they can't change modes */
3016 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
3017 send_notoper(state);
3021 if (MyUser(state->sptr)) {
3022 if (state->flags & MODE_PARSE_FORCE) {
3023 /* If an unprivileged oper is trying to force it, refuse. */
3024 if (!HasPriv(state->sptr, PRIV_APASS_OPMODE)) {
3025 send_reply(state->sptr, ERR_NOTMANAGER, state->chptr->chname,
3026 state->chptr->chname);
3030 /* If they are not the channel manager, they are not allowed to change it. */
3031 if (!IsChannelManager(state->member)) {
3032 if (*state->chptr->mode.apass) {
3033 send_reply(state->sptr, ERR_NOTMANAGER, state->chptr->chname,
3034 state->chptr->chname);
3036 send_reply(state->sptr, ERR_NOMANAGER, state->chptr->chname,
3037 (TStime() - state->chptr->creationtime < 172800) ?
3038 "approximately 4-5 minutes" : "approximately 48 hours");
3042 /* Can't remove the Apass while Upass is still set. */
3043 if (state->dir == MODE_DEL && *state->chptr->mode.upass) {
3044 send_reply(state->sptr, ERR_UPASSSET, state->chptr->chname, state->chptr->chname);
3047 /* Can't add an Apass if one is set, nor can one remove the wrong Apass. */
3048 if ((state->dir == MODE_ADD && *state->chptr->mode.apass) ||
3049 (state->dir == MODE_DEL && ircd_strcmp(state->chptr->mode.apass, t_str))) {
3050 send_reply(state->sptr, ERR_KEYSET, state->chptr->chname);
3055 /* Forbid removing the Apass if the channel is older than 48 hours
3056 * unless an oper is doing it. */
3057 if (TStime() - state->chptr->creationtime >= 172800
3058 && state->dir == MODE_DEL
3059 && !IsAnOper(state->sptr)) {
3060 send_reply(state->sptr, ERR_CHANSECURED, state->chptr->chname);
3065 /* allow removing and then adding apass, but not adding and then removing */
3066 if (state->dir == MODE_ADD)
3068 if (state->done & DONE_APASS_ADD)
3070 state->done |= DONE_APASS_ADD;
3074 if (state->done & (DONE_APASS_ADD | DONE_APASS_DEL))
3076 state->done |= DONE_APASS_DEL;
3079 /* If the Apass is invalid, tell the user and bail. */
3080 if (!is_clean_key(state, t_str, state->dir == MODE_ADD ? "MODE +A" :
3087 if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
3088 !ircd_strcmp(state->chptr->mode.apass, t_str))
3089 return; /* no apass change */
3091 /* Skip if this is a burst, we have an Apass already and the new Apass is
3092 * after the old one alphabetically */
3093 if ((state->flags & MODE_PARSE_BURST) &&
3094 *(state->chptr->mode.apass) &&
3095 ircd_strcmp(state->chptr->mode.apass, t_str) <= 0)
3098 if (state->flags & MODE_PARSE_BOUNCE) {
3099 if (*state->chptr->mode.apass) /* reset old apass */
3100 modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0],
3101 state->chptr->mode.apass, 0);
3102 else /* remove new bogus apass */
3103 modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
3104 } else /* send new apass */
3105 modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
3107 if (state->flags & MODE_PARSE_SET) {
3108 if (state->dir == MODE_ADD) { /* set the new apass */
3109 /* Only accept the new apass if there is no current apass or
3110 * this is a BURST. */
3111 if (state->chptr->mode.apass[0] == '\0' ||
3112 (state->flags & MODE_PARSE_BURST))
3113 ircd_strncpy(state->chptr->mode.apass, t_str, KEYLEN);
3114 /* Make it VERY clear to the user that this is a one-time password */
3115 if (MyUser(state->sptr)) {
3116 send_reply(state->sptr, RPL_APASSWARN_SET, state->chptr->mode.apass);
3117 send_reply(state->sptr, RPL_APASSWARN_SECRET, state->chptr->chname,
3118 state->chptr->mode.apass);
3120 /* Give the channel manager level 0 ops.
3121 There should not be tested for IsChannelManager here because
3122 on the local server it is impossible to set the apass if one
3123 isn't a channel manager and remote servers might need to sync
3124 the oplevel here: when someone creates a channel (and becomes
3125 channel manager) during a net.break, and only sets the Apass
3126 after the net rejoined, they will have oplevel MAXOPLEVEL on
3127 all remote servers. */
3129 SetOpLevel(state->member, 0);
3130 } else { /* remove the old apass */
3131 *state->chptr->mode.apass = '\0';
3132 /* Clear Upass so that there is never a Upass set when a zannel is burst. */
3133 *state->chptr->mode.upass = '\0';
3134 if (MyUser(state->sptr))
3135 send_reply(state->sptr, RPL_APASSWARN_CLEAR);
3136 /* Revert everyone to MAXOPLEVEL. */
3137 for (memb = state->chptr->members; memb; memb = memb->next_member) {
3138 if (memb->status & MODE_CHANOP)
3139 SetOpLevel(memb, MAXOPLEVEL);
3145 /** Compare one ban's extent to another.
3146 * This works very similarly to mmatch() but it knows about CIDR masks
3147 * and ban exceptions. If both bans are CIDR-based, compare their
3148 * address bits; otherwise, use mmatch().
3149 * @param[in] old_ban One ban.
3150 * @param[in] new_ban Another ban.
3151 * @return Zero if \a old_ban is a superset of \a new_ban, non-zero otherwise.
3154 bmatch(struct Ban *old_ban, struct Ban *new_ban)
3157 assert(old_ban != NULL);
3158 assert(new_ban != NULL);
3159 /* A ban is never treated as a superset of an exception and vice versa. */
3160 if(((old_ban->flags & BAN_EXCEPTION) && !(new_ban->flags & BAN_EXCEPTION))
3161 || (!(old_ban->flags & BAN_EXCEPTION) && (new_ban->flags & BAN_EXCEPTION)))
3163 /* If either is not an address mask, match the text masks. */
3164 if ((old_ban->flags & new_ban->flags & BAN_IPMASK) == 0)
3165 return mmatch(old_ban->banstr, new_ban->banstr);
3166 /* If the old ban has a longer prefix than new, it cannot be a superset. */
3167 if (old_ban->addrbits > new_ban->addrbits)
3169 /* Compare the masks before the hostname part. */
3170 old_ban->banstr[old_ban->nu_len] = new_ban->banstr[new_ban->nu_len] = '\0';
3171 res = mmatch(old_ban->banstr, new_ban->banstr);
3172 old_ban->banstr[old_ban->nu_len] = new_ban->banstr[new_ban->nu_len] = '@';
3175 /* If the old ban's mask mismatches, cannot be a superset. */
3176 if (!ipmask_check(&new_ban->address, &old_ban->address, old_ban->addrbits))
3178 /* Otherwise it depends on whether the old ban's text is a superset
3180 return mmatch(old_ban->banstr, new_ban->banstr);
3183 /** Add a ban from a ban list and mark bans that should be removed
3184 * because they overlap.
3186 * There are three invariants for a ban list. First, no ban may be
3187 * more specific than another ban. Second, no exception may be more
3188 * specific than another exception. Finally, no ban may be more
3189 * specific than any exception.
3191 * @param[in,out] banlist Pointer to head of list.
3192 * @param[in] newban Ban (or exception) to add (or remove).
3193 * @param[in] do_free If non-zero, free \a newban on failure.
3194 * @return Zero if \a newban could be applied, non-zero if not.
3196 int apply_ban(struct Ban **banlist, struct Ban *newban, int do_free)
3201 assert(newban->flags & (BAN_ADD|BAN_DEL));
3202 if (newban->flags & BAN_ADD) {
3204 /* If a less specific *active* entry is found, fail. */
3205 for (ban = *banlist; ban; ban = ban->next) {
3206 if (!bmatch(ban, newban) && !(ban->flags & BAN_DEL)) {
3211 if (!(ban->flags & (BAN_OVERLAPPED|BAN_DEL))) {
3213 totlen += strlen(ban->banstr);
3216 /* Mark more specific entries and add this one to the end of the list. */
3217 while ((ban = *banlist) != NULL) {
3218 if (!bmatch(newban, ban)) {
3219 ban->flags |= BAN_OVERLAPPED | BAN_DEL;
3221 banlist = &ban->next;
3225 } else if (newban->flags & BAN_DEL) {
3226 size_t remove_count = 0;
3227 /* Mark more specific entries. */
3228 for (ban = *banlist; ban; ban = ban->next) {
3229 if (!bmatch(newban, ban)) {
3230 ban->flags |= BAN_OVERLAPPED | BAN_DEL;
3236 /* If no matches were found, fail. */
3246 /* Removes MODE_WASDELJOINS in a channel.
3247 * Reveals all hidden users.
3249 static void reveal_hidden_chan_users(struct ParseState *state, ulong64 *flag_p) {
3250 struct Membership *member;
3252 /* If the channel is not +d, do nothing. */
3253 if(!(state->chptr->mode.mode & MODE_WASDELJOINS)) return;
3255 /* Iterate through all members and reveal them if they are hidden. */
3256 for(member = state->chptr->members; member; member = member->next_member) {
3257 if(IsDelayedJoin(member) && !IsInvisibleJoin(member)) {
3258 RevealDelayedJoin(member);
3263 /* Handle MODE_AUDITORIUM changes
3264 * set Delayed for all hidden users on MODE_DEL
3265 * part all nonoped users on MODE_ADD
3267 static void audit_chan_users(struct ParseState *state, ulong64 *flag_p) {
3268 struct Membership *member;
3269 if (state->dir == MODE_ADD) {
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_PART, member->channel, member->user, SKIP_OPS, "%H :%s", member->channel, "mode +u set.");
3276 for(member = state->chptr->members; member; member = member->next_member) {
3277 if(!IsChanOp(member) && !HasVoice(member)) {
3278 sendcmdto_channel_butserv_butone(member->user, CMD_JOIN, member->channel, member->user, SKIP_OPS, ":%H", member->channel);
3286 * Helper function to convert bans
3289 mode_parse_ban(struct ParseState *state, ulong64 *flag_p)
3292 struct Ban *ban, *newban;
3294 if (state->parc <= 0) { /* Not enough args, send ban list */
3295 if (MyUser(state->sptr) && !(state->done & DONE_BANLIST)) {
3296 send_ban_list(state->sptr, state->chptr);
3297 state->done |= DONE_BANLIST;
3302 if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
3305 t_str = state->parv[state->args_used++]; /* grab arg */
3309 /* If they're not an oper, they can't change modes */
3310 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
3311 send_notoper(state);
3315 if ((s = strchr(t_str, ' ')))
3318 if (!*t_str || *t_str == ':') { /* warn if empty */
3319 if (MyUser(state->sptr))
3320 need_more_params(state->sptr, state->dir == MODE_ADD ? "MODE +b" :
3325 /* Clear all ADD/DEL/OVERLAPPED flags from ban list. */
3326 if (!(state->done & DONE_BANCLEAN)) {
3327 for (ban = state->chptr->banlist; ban; ban = ban->next)
3328 ban->flags &= ~(BAN_ADD | BAN_DEL | BAN_OVERLAPPED);
3329 state->done |= DONE_BANCLEAN;
3332 /* remember the ban for the moment... */
3333 newban = state->banlist + (state->numbans++);
3335 newban->flags = ((state->dir == MODE_ADD) ? BAN_ADD : BAN_DEL)
3336 | (*flag_p == MODE_BAN ? 0 : BAN_EXCEPTION);
3337 set_ban_mask(newban, collapse(pretty_mask(t_str)));
3338 ircd_strncpy(newban->who, IsUser(state->sptr) ? cli_name(state->sptr) : "*", NICKLEN);
3339 newban->when = TStime();
3340 apply_ban(&state->chptr->banlist, newban, 0);
3344 * This is the bottom half of the ban processor
3347 mode_process_bans(struct ParseState *state)
3349 struct Ban *ban, *newban, *prevban, *nextban;
3355 for (prevban = 0, ban = state->chptr->banlist; ban; ban = nextban) {
3357 banlen = strlen(ban->banstr);
3359 nextban = ban->next;
3361 if ((ban->flags & (BAN_DEL | BAN_ADD)) == (BAN_DEL | BAN_ADD)) {
3363 prevban->next = 0; /* Break the list; ban isn't a real ban */
3365 state->chptr->banlist = 0;
3371 } else if (ban->flags & BAN_DEL) { /* Deleted a ban? */
3373 DupString(bandup, ban->banstr);
3374 modebuf_mode_string(state->mbuf, MODE_DEL | MODE_BAN, bandup, 1);
3376 if (state->flags & MODE_PARSE_SET) { /* Ok, make it take effect */
3377 if (prevban) /* clip it out of the list... */
3378 prevban->next = ban->next;
3380 state->chptr->banlist = ban->next;
3387 continue; /* next ban; keep prevban like it is */
3389 ban->flags &= BAN_IPMASK; /* unset other flags */
3390 } else if (ban->flags & BAN_ADD) { /* adding a ban? */
3392 prevban->next = 0; /* Break the list; ban isn't a real ban */
3394 state->chptr->banlist = 0;
3396 /* If we're supposed to ignore it, do so. */
3397 if (ban->flags & BAN_OVERLAPPED &&
3398 !(state->flags & MODE_PARSE_BOUNCE)) {
3402 if (state->flags & MODE_PARSE_SET && MyUser(state->sptr) &&
3403 (len > (feature_int(FEAT_AVBANLEN) * feature_int(FEAT_MAXBANS)) ||
3404 count > feature_int(FEAT_MAXBANS))) {
3405 send_reply(state->sptr, ERR_BANLISTFULL, state->chptr->chname,
3411 /* add the ban to the buffer */
3412 DupString(bandup, ban->banstr);
3413 modebuf_mode_string(state->mbuf, MODE_ADD | MODE_BAN, bandup, 1);
3415 if (state->flags & MODE_PARSE_SET) { /* create a new ban */
3416 newban = make_ban(ban->banstr);
3417 strcpy(newban->who, ban->who);
3418 newban->when = ban->when;
3419 newban->flags = ban->flags & BAN_IPMASK;
3421 newban->next = state->chptr->banlist; /* and link it in */
3422 state->chptr->banlist = newban;
3431 } /* for (prevban = 0, ban = state->chptr->banlist; ban; ban = nextban) { */
3433 if (changed) /* if we changed the ban list, we must invalidate the bans */
3434 mode_ban_invalidate(state->chptr);
3438 * Helper function to process client changes
3441 mode_parse_client(struct ParseState *state, ulong64 *flag_p)
3445 struct Client *acptr;
3446 struct Membership *member;
3447 int oplevel = MAXOPLEVEL + 1;
3451 if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
3454 if (state->parc <= 0) /* return if not enough args */
3457 t_str = state->parv[state->args_used++]; /* grab arg */
3461 /* If they're not an oper, they can't change modes */
3462 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
3463 send_notoper(state);
3467 if (MyUser(state->sptr)) {
3468 colon = strchr(t_str, ':');
3469 if (colon != NULL) {
3471 req_oplevel = atoi(colon);
3472 if (*flag_p == CHFL_VOICE || state->dir == MODE_DEL) {
3473 /* Ignore the colon and its argument. */
3474 } else if (!(state->flags & MODE_PARSE_FORCE)
3476 && (req_oplevel < OpLevel(state->member)
3477 || (req_oplevel == OpLevel(state->member)
3478 && OpLevel(state->member) < MAXOPLEVEL)
3479 || req_oplevel > MAXOPLEVEL)) {
3480 send_reply(state->sptr, ERR_NOTLOWEROPLEVEL,
3481 t_str, state->chptr->chname,
3482 OpLevel(state->member), req_oplevel, "op",
3483 OpLevel(state->member) == req_oplevel ? "the same" : "a higher");
3484 } else if (req_oplevel <= MAXOPLEVEL)
3485 oplevel = req_oplevel;
3487 /* find client we're manipulating */
3488 acptr = find_chasing(state->sptr, t_str, NULL);
3490 if (t_str[5] == ':') {
3492 oplevel = atoi(t_str + 6);
3494 acptr = findNUser(t_str);
3498 return; /* find_chasing() already reported an error to the user */
3500 for (i = 0; i < MAXPARA; i++) /* find an element to stick them in */
3501 if (!state->cli_change[i].flag || (state->cli_change[i].client == acptr &&
3502 state->cli_change[i].flag & flag_p[0]))
3503 break; /* found a slot */
3505 /* If we are going to bounce this deop, mark the correct oplevel. */
3506 if (state->flags & MODE_PARSE_BOUNCE
3507 && state->dir == MODE_DEL
3508 && flag_p[0] == MODE_CHANOP
3509 && (member = find_member_link(state->chptr, acptr)))
3510 oplevel = OpLevel(member);
3512 /* Store what we're doing to them */
3513 state->cli_change[i].flag = state->dir | flag_p[0];
3514 state->cli_change[i].oplevel = oplevel;
3515 state->cli_change[i].client = acptr;
3519 * Helper function to process the changed client list
3522 mode_process_clients(struct ParseState *state)
3525 struct Membership *member;
3527 for (i = 0; state->cli_change[i].flag; i++) {
3528 assert(0 != state->cli_change[i].client);
3530 /* look up member link */
3531 if (!(member = find_member_link(state->chptr,
3532 state->cli_change[i].client)) ||
3533 (MyUser(state->sptr) && IsZombie(member))) {
3534 if (MyUser(state->sptr))
3535 send_reply(state->sptr, ERR_USERNOTINCHANNEL,
3536 cli_name(state->cli_change[i].client),
3537 state->chptr->chname);
3540 if (member && (IsInvisibleJoin(member) && state->cli_change[i].client != state->sptr) && IsDelayedJoin(member)) {
3541 if (MyUser(state->sptr))
3542 send_reply(state->sptr, ERR_USERNOTINCHANNEL,
3543 cli_name(state->cli_change[i].client),
3544 state->chptr->chname);
3548 if ((state->cli_change[i].flag & MODE_ADD &&
3549 (state->cli_change[i].flag & member->status)) ||
3550 (state->cli_change[i].flag & MODE_DEL &&
3551 !(state->cli_change[i].flag & member->status)))
3552 continue; /* no change made, don't do anything */
3554 /* see if the deop is allowed */
3555 if ((state->cli_change[i].flag & (MODE_DEL | MODE_CHANOP)) ==
3556 (MODE_DEL | MODE_CHANOP)) {
3557 /* Prevent +k users from being deopped, but allow extra ops to deop
3558 * +k users. We do not prevent deopping _REAL_ services because /opmode
3559 * will always allow this.
3561 if(IsChannelService(state->cli_change[i].client) && !IsXtraOp(state->sptr) && state->sptr != state->cli_change[i].client) {
3562 if (state->flags & MODE_PARSE_FORCE) /* it was forced */
3563 sendto_opmask_butone(0, SNO_HACK4, "Deop of +k user on %H by %s",
3565 (IsServer(state->sptr) ? cli_name(state->sptr) :
3566 cli_name((cli_user(state->sptr))->server)));
3568 else if (MyUser(state->sptr) && state->flags & MODE_PARSE_SET) {
3569 send_reply(state->sptr, ERR_ISCHANSERVICE,
3570 cli_name(state->cli_change[i].client),
3571 state->chptr->chname);
3576 /* check deop for local user */
3577 if (MyUser(state->sptr)) {
3579 /* don't allow local opers to be deopped on local channels */
3580 if (state->cli_change[i].client != state->sptr &&
3581 IsLocalChannel(state->chptr->chname) &&
3582 HasPriv(state->cli_change[i].client, PRIV_DEOP_LCHAN)) {
3583 send_reply(state->sptr, ERR_ISOPERLCHAN,
3584 cli_name(state->cli_change[i].client),
3585 state->chptr->chname);
3589 /* Forbid deopping other members with an oplevel less than
3590 * one's own level, and other members with an oplevel the same
3591 * as one's own unless both are at MAXOPLEVEL. */
3592 if (state->sptr != state->cli_change[i].client
3594 && ((OpLevel(member) < OpLevel(state->member))
3595 || (OpLevel(member) == OpLevel(state->member)
3596 && OpLevel(member) < MAXOPLEVEL))) {
3597 int equal = (OpLevel(member) == OpLevel(state->member));
3598 send_reply(state->sptr, ERR_NOTLOWEROPLEVEL,
3599 cli_name(state->cli_change[i].client),
3600 state->chptr->chname,
3601 OpLevel(state->member), OpLevel(member),
3602 "deop", equal ? "the same" : "a higher");
3608 /* set op-level of member being opped */
3609 if ((state->cli_change[i].flag & (MODE_ADD | MODE_CHANOP)) ==
3610 (MODE_ADD | MODE_CHANOP)) {
3611 /* If a valid oplevel was specified, use it.
3612 * Otherwise, if being opped by an outsider, get MAXOPLEVEL.
3613 * Otherwise, if not an apass channel, or state->member has
3614 * MAXOPLEVEL, get oplevel MAXOPLEVEL.
3615 * Otherwise, get state->member's oplevel+1.
3617 if (state->cli_change[i].oplevel <= MAXOPLEVEL)
3618 SetOpLevel(member, state->cli_change[i].oplevel);
3619 else if (!state->member)
3620 SetOpLevel(member, MAXOPLEVEL);
3621 else if (OpLevel(state->member) >= MAXOPLEVEL)
3622 SetOpLevel(member, OpLevel(state->member));
3624 SetOpLevel(member, OpLevel(state->member) + 1);
3627 int user_visible = (member->status & CHFL_VOICED_OR_OPPED);
3629 /* actually effect the change */
3630 if (state->flags & MODE_PARSE_SET) {
3631 if (state->cli_change[i].flag & MODE_ADD) {
3632 if (IsDelayedJoin(member) && !IsZombie(member))
3633 RevealDelayedJoin(member);
3634 member->status |= (state->cli_change[i].flag &
3635 (MODE_CHANOP | MODE_VOICE));
3636 if (state->cli_change[i].flag & MODE_CHANOP)
3637 ClearDeopped(member);
3639 member->status &= ~(state->cli_change[i].flag &
3640 (MODE_CHANOP | MODE_VOICE));
3643 /* accumulate the change */
3644 modebuf_mode_client(state->mbuf, state->cli_change[i].flag,
3645 state->cli_change[i].client,
3646 state->cli_change[i].oplevel);
3648 if((member->channel->mode.mode & MODE_AUDITORIUM)) {
3649 //join or part the user
3650 if((member->status & CHFL_VOICED_OR_OPPED) && !user_visible) {
3651 sendcmdto_channel_butserv_butone(member->user, CMD_JOIN, member->channel, member->user, SKIP_OPS, ":%H", member->channel);
3652 } else if(!(member->status & CHFL_VOICED_OR_OPPED) && user_visible) {
3653 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.");
3655 if(MyUser(member->user) && (state->cli_change[i].flag & MODE_CHANOP)) {
3656 //do_names(member->user, member->channel, NAMES_ALL|NAMES_EON|((member->status & MODE_CHANOP) ? 0 : NAMES_OPS));
3657 //this is not working for all users :( so we have to send join/part events
3658 struct Membership *member2;
3659 if (state->cli_change[i].flag & MODE_ADD) {
3661 for(member2 = state->chptr->members; member2; member2 = member2->next_member) {
3662 if(!IsChanOp(member2) && !HasVoice(member2)) {
3663 sendcmdto_one(member2->user, CMD_JOIN, member->user, ":%H", member->channel);
3668 for(member2 = state->chptr->members; member2; member2 = member2->next_member) {
3669 if(!IsChanOp(member2) && !HasVoice(member2) && member != member2) {
3670 sendcmdto_one(member2->user, CMD_PART, member->user, "%H :%s", member->channel, "invisible user on +u channel.");
3676 } /* for (i = 0; state->cli_change[i].flags; i++) */
3680 * Helper function to process the simple modes
3683 mode_parse_mode(struct ParseState *state, ulong64 *flag_p)
3685 /* If they're not an oper, they can't change modes */
3686 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
3687 send_notoper(state);
3694 /* Local users are not permitted to change registration status */
3695 if (flag_p[0] == MODE_REGISTERED && !(state->flags & MODE_PARSE_FORCE) && MyUser(state->sptr))
3698 if(flag_p[0] == MODE_AUDITORIUM)
3699 audit_chan_users(state, flag_p);
3701 if (state->dir == MODE_ADD) {
3702 state->add |= flag_p[0];
3703 state->del &= ~flag_p[0];
3705 if (flag_p[0] & MODE_SECRET) {
3706 state->add &= ~MODE_PRIVATE;
3707 state->del |= MODE_PRIVATE;
3708 } else if (flag_p[0] & MODE_PRIVATE) {
3709 state->add &= ~MODE_SECRET;
3710 state->del |= MODE_SECRET;
3713 state->add &= ~flag_p[0];
3714 state->del |= flag_p[0];
3717 assert(0 == (state->add & state->del));
3718 assert((MODE_SECRET | MODE_PRIVATE) !=
3719 (state->add & (MODE_SECRET | MODE_PRIVATE)));
3723 * This routine is intended to parse MODE or OPMODE commands and effect the
3724 * changes (or just build the bounce buffer).
3726 * \param[out] mbuf Receives parsed representation of mode change.
3727 * \param[in] cptr Connection that sent the message to this server.
3728 * \param[in] sptr Original source of the message.
3729 * \param[in] chptr Channel whose modes are being changed.
3730 * \param[in] parc Number of valid strings in \a parv.
3731 * \param[in] parv Text arguments representing mode change, with the
3732 * zero'th element containing a string like "+m" or "-o".
3733 * \param[in] flags Set of bitwise MODE_PARSE_* flags.
3734 * \param[in] member If non-null, the channel member attempting to change the modes.
3737 mode_parse(struct ModeBuf *mbuf, struct Client *cptr, struct Client *sptr,
3738 struct Channel *chptr, int parc, char *parv[], unsigned int flags,
3739 struct Membership* member)
3741 static ulong64 chan_flags[] = {
3746 MODE_MODERATED, 'm',
3747 MODE_TOPICLIMIT, 't',
3748 MODE_INVITEONLY, 'i',
3749 MODE_NOPRIVMSGS, 'n',
3753 MODE_REGISTERED, 'R',
3758 MODE_WASDELJOINS, 'd',
3764 MODE_QUARANTINE, 'Q',
3767 MODE_AUDITORIUM, 'u',
3778 struct ParseState state;
3789 state.chptr = chptr;
3790 state.member = member;
3793 state.flags = flags;
3794 state.dir = MODE_ADD;
3798 state.args_used = 0;
3799 state.max_args = MAXMODEPARAMS;
3802 for (i = 0; i < MAXPARA; i++) { /* initialize ops/voices arrays */
3803 state.banlist[i].next = 0;
3804 state.banlist[i].who[0] = '\0';
3805 state.banlist[i].when = 0;
3806 state.banlist[i].flags = 0;
3807 state.cli_change[i].flag = 0;
3808 state.cli_change[i].client = 0;
3811 modestr = state.parv[state.args_used++];
3815 for (; *modestr; modestr++) {
3816 for (flag_p = chan_flags; flag_p[0]; flag_p += 2) /* look up flag */
3817 if (flag_p[1] == *modestr)
3820 if (!flag_p[0]) { /* didn't find it? complain and continue */
3821 if (MyUser(state.sptr))
3822 send_reply(state.sptr, ERR_UNKNOWNMODE, *modestr);
3827 case '+': /* switch direction to MODE_ADD */
3828 case '-': /* switch direction to MODE_DEL */
3829 state.dir = flag_p[0];
3832 case 'l': /* deal with limits */
3833 mode_parse_limit(&state, flag_p);
3835 case 'a': /* deal with limits */
3836 mode_parse_access(&state, flag_p);
3839 mode_parse_altchan(&state, flag_p);
3842 mode_parse_noflood(&state, flag_p);
3845 if(IsNetServ(state.sptr) && IsSecurityServ(state.sptr))
3846 mode_parse_mode(&state, flag_p);
3848 case 'k': /* deal with keys */
3849 mode_parse_key(&state, flag_p);
3851 case 'A': /* deal with Admin passes */
3852 if (IsServer(cptr) || feature_bool(FEAT_OPLEVELS))
3853 mode_parse_apass(&state, flag_p);
3855 case 'U': /* deal with user passes */
3856 if (IsServer(cptr) || feature_bool(FEAT_OPLEVELS))
3857 mode_parse_upass(&state, flag_p);
3859 case 'b': /* deal with bans */
3860 mode_parse_ban(&state, flag_p);
3863 case 'd': /* deal with hidden members */
3864 reveal_hidden_chan_users(&state, flag_p);
3867 case 'o': /* deal with ops/voice */
3869 mode_parse_client(&state, flag_p);
3872 case 'z': /* remote clients are allowed to change +z */
3873 if(!MyUser(state.sptr) || (state.flags & MODE_PARSE_FORCE))
3874 mode_parse_mode(&state, flag_p);
3876 case 'O': /* remote clients are allowed to change +z */
3877 //struct User* user = cli_user(cptr);
3878 //|| (chptr.chanowner && IsAccount(cptr) && chptr.chanowner == user->account)
3879 if(!MyUser(state.sptr) || (state.flags & MODE_PARSE_FORCE) )
3880 mode_parse_mode(&state, flag_p);
3883 default: /* deal with other modes */
3884 mode_parse_mode(&state, flag_p);
3886 } /* switch (*modestr) */
3887 } /* for (; *modestr; modestr++) */
3889 if (state.flags & MODE_PARSE_BURST)
3890 break; /* don't interpret any more arguments */
3892 if (state.parc > 0) { /* process next argument in string */
3893 modestr = state.parv[state.args_used++];
3897 if (IsServer(state.cptr) && !state.parc && IsDigit(*modestr)) {
3900 if (!(state.flags & MODE_PARSE_SET)) /* don't set earlier TS if */
3901 break; /* we're then going to bounce the mode! */
3903 recv_ts = atoi(modestr);
3905 if (recv_ts && recv_ts < state.chptr->creationtime)
3906 state.chptr->creationtime = recv_ts; /* respect earlier TS */
3907 else if (recv_ts > state.chptr->creationtime) {
3908 struct Client *sserv;
3910 /* Check whether the originating server has fully processed
3911 * the burst to it. */
3913 if (!IsServer(sserv))
3914 sserv = cli_user(sserv)->server;
3915 if (IsBurstOrBurstAck(sserv)) {
3916 /* This is a legal but unusual case; the source server
3917 * probably just has not processed the BURST for this
3918 * channel. It SHOULD wipe out all its modes soon, so
3919 * silently ignore the mode change rather than send a
3920 * bounce that could desync modes from our side (that
3921 * have already been sent).
3923 state.mbuf->mb_add = 0;
3924 state.mbuf->mb_rem = 0;
3925 state.mbuf->mb_count = 0;
3926 return state.args_used;
3928 /* Server is desynced; bounce the mode and deop the source
3930 state.flags &= ~MODE_PARSE_SET;
3931 state.flags |= MODE_PARSE_BOUNCE;
3932 state.mbuf->mb_dest &= ~(MODEBUF_DEST_CHANNEL | MODEBUF_DEST_HACK4);
3933 state.mbuf->mb_dest |= MODEBUF_DEST_BOUNCE | MODEBUF_DEST_HACK2;
3934 if (!IsServer(state.cptr))
3935 state.mbuf->mb_dest |= MODEBUF_DEST_DEOP;
3939 break; /* break out of while loop */
3940 } else if (state.flags & MODE_PARSE_STRICT ||
3941 (MyUser(state.sptr) && state.max_args <= 0)) {
3942 state.parc++; /* we didn't actually gobble the argument */
3944 break; /* break out of while loop */
3947 } /* while (*modestr) */
3950 * the rest of the function finishes building resultant MODEs; if the
3951 * origin isn't a member or an oper, skip it.
3953 if (!state.mbuf || state.flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER))
3954 return state.args_used; /* tell our parent how many args we gobbled */
3956 t_mode = state.chptr->mode.mode;
3958 if (state.del & t_mode) { /* delete any modes to be deleted... */
3959 modebuf_mode(state.mbuf, MODE_DEL | (state.del & t_mode));
3961 t_mode &= ~state.del;
3963 if (state.add & ~t_mode) { /* add any modes to be added... */
3964 modebuf_mode(state.mbuf, MODE_ADD | (state.add & ~t_mode));
3966 t_mode |= state.add;
3969 if (state.flags & MODE_PARSE_SET) { /* set the channel modes */
3970 if ((state.chptr->mode.mode & MODE_INVITEONLY) &&
3971 !(t_mode & MODE_INVITEONLY))
3972 mode_invite_clear(state.chptr);
3974 state.chptr->mode.mode = t_mode;
3977 if (state.flags & MODE_PARSE_WIPEOUT) {
3978 if (state.chptr->mode.limit && !(state.done & DONE_LIMIT))
3979 modebuf_mode_uint(state.mbuf, MODE_DEL | MODE_LIMIT,
3980 state.chptr->mode.limit);
3981 if (state.chptr->mode.access && !(state.done & DONE_ACCESS))
3982 modebuf_mode_uint(state.mbuf, MODE_DEL | MODE_ACCESS,
3983 state.chptr->mode.access);
3984 if (state.chptr->mode.altchan && !(state.done & DONE_ALTCHAN))
3985 modebuf_mode_string(state.mbuf, MODE_DEL | MODE_ALTCHAN,
3986 state.chptr->mode.altchan, 0);
3987 if (state.chptr->mode.noflood && !(state.done & DONE_NOFLOOD))
3988 modebuf_mode_string(state.mbuf, MODE_DEL | MODE_NOFLOOD,
3989 state.chptr->mode.noflood, 0);
3990 if (*state.chptr->mode.key && !(state.done & DONE_KEY_DEL))
3991 modebuf_mode_string(state.mbuf, MODE_DEL | MODE_KEY,
3992 state.chptr->mode.key, 0);
3993 if (*state.chptr->mode.upass && !(state.done & DONE_UPASS_DEL))
3994 modebuf_mode_string(state.mbuf, MODE_DEL | MODE_UPASS,
3995 state.chptr->mode.upass, 0);
3996 if (*state.chptr->mode.apass && !(state.done & DONE_APASS_DEL))
3997 modebuf_mode_string(state.mbuf, MODE_DEL | MODE_APASS,
3998 state.chptr->mode.apass, 0);
4001 if (state.done & DONE_BANCLEAN) /* process bans */
4002 mode_process_bans(&state);
4004 /* process client changes */
4005 if (state.cli_change[0].flag)
4006 mode_process_clients(&state);
4008 return state.args_used; /* tell our parent how many args we gobbled */
4012 * Initialize a join buffer
4015 joinbuf_init(struct JoinBuf *jbuf, struct Client *source,
4016 struct Client *connect, unsigned int type, char *comment,
4022 assert(0 != source);
4023 assert(0 != connect);
4025 jbuf->jb_source = source; /* just initialize struct JoinBuf */
4026 jbuf->jb_connect = connect;
4027 jbuf->jb_type = type;
4028 jbuf->jb_comment = comment;
4029 jbuf->jb_create = create;
4031 jbuf->jb_strlen = (((type == JOINBUF_TYPE_JOIN ||
4032 type == JOINBUF_TYPE_PART ||
4033 type == JOINBUF_TYPE_PARTALL) ?
4034 STARTJOINLEN : STARTCREATELEN) +
4035 (comment ? strlen(comment) + 2 : 0));
4037 for (i = 0; i < MAXJOINARGS; i++)
4038 jbuf->jb_channels[i] = 0;
4042 * Add a channel to the join buffer
4045 joinbuf_join(struct JoinBuf *jbuf, struct Channel *chan, unsigned int flags)
4053 sendcmdto_serv_butone(jbuf->jb_source, CMD_JOIN, jbuf->jb_connect, "0");
4057 is_local = IsLocalChannel(chan->chname);
4059 if (jbuf->jb_type == JOINBUF_TYPE_PART ||
4060 jbuf->jb_type == JOINBUF_TYPE_PARTALL) {
4061 struct Membership *member = find_member_link(chan, jbuf->jb_source);
4062 if (IsUserParting(member))
4064 SetUserParting(member);
4066 /* Send notification to channel */
4067 if((chan->mode.mode & MODE_AUDITORIUM) && !(member->status & CHFL_VOICED_OR_OPPED)) {
4068 //send part to ops only
4069 sendcmdto_channel_butserv_butone(jbuf->jb_source, CMD_PART, chan, NULL, SKIP_NONOPS, "%H :%s", chan, jbuf->jb_comment);
4070 if(MyUser(jbuf->jb_source))
4071 sendcmdto_one(jbuf->jb_source, CMD_PART, jbuf->jb_source, "%H :%s", chan, jbuf->jb_comment);
4072 } else if (!(flags & (CHFL_ZOMBIE | CHFL_DELAYED)))
4073 sendcmdto_channel_butserv_butone(jbuf->jb_source, CMD_PART, chan, NULL, 0,
4074 (flags & CHFL_BANNED || !jbuf->jb_comment) ?
4075 ":%H" : "%H :%s", chan, jbuf->jb_comment);
4076 else if (MyUser(jbuf->jb_source))
4077 sendcmdto_one(jbuf->jb_source, CMD_PART, jbuf->jb_source,
4078 (flags & CHFL_BANNED || !jbuf->jb_comment) ?
4079 ":%H" : "%H :%s", chan, jbuf->jb_comment);
4080 /* XXX: Shouldn't we send a PART here anyway? */
4081 /* to users on the channel? Why? From their POV, the user isn't on
4082 * the channel anymore anyway. We don't send to servers until below,
4083 * when we gang all the channel parts together. Note that this is
4084 * exactly the same logic, albeit somewhat more concise, as was in
4085 * the original m_part.c */
4087 if (jbuf->jb_type == JOINBUF_TYPE_PARTALL ||
4088 is_local) /* got to remove user here */
4089 remove_user_from_channel(jbuf->jb_source, chan);
4091 int oplevel = !chan->mode.apass[0] ? MAXOPLEVEL
4092 : (flags & CHFL_CHANNEL_MANAGER) ? 0
4094 /* Add user to channel */
4095 if (((chan->mode.mode & MODE_DELJOINS) && !(flags & CHFL_VOICED_OR_OPPED)) || ((flags & CHFL_INVISIBLE) && !(flags & CHFL_VOICED_OR_OPPED))) {
4096 add_user_to_channel(chan, jbuf->jb_source, flags | CHFL_DELAYED, oplevel);
4098 add_user_to_channel(chan, jbuf->jb_source, flags, oplevel);
4100 /* send JOIN notification to all servers (CREATE is sent later). */
4101 if (jbuf->jb_type != JOINBUF_TYPE_CREATE && !is_local) {
4102 if ((flags & CHFL_INVISIBLE) && !(flags & CHFL_VOICED_OR_OPPED)) {
4103 sendcmdto_serv_butone(jbuf->jb_source, CMD_JOIN, jbuf->jb_connect,
4104 "%H %Tu %i", chan, chan->creationtime, 1);
4106 sendcmdto_serv_butone(jbuf->jb_source, CMD_JOIN, jbuf->jb_connect,
4107 "%H %Tu %i", chan, chan->creationtime, 0);
4111 if((chan->mode.mode & MODE_AUDITORIUM) && !(flags & CHFL_VOICED_OR_OPPED)) {
4112 //we have to send this JOIN event to ops only...
4113 sendcmdto_channel_butserv_butone(jbuf->jb_source, CMD_JOIN, chan, NULL, SKIP_NONOPS, "%H", chan);
4114 if(MyUser(jbuf->jb_source))
4115 sendcmdto_one(jbuf->jb_source, CMD_JOIN, jbuf->jb_source, ":%H", chan);
4117 else if (!((chan->mode.mode & MODE_DELJOINS) && !(flags & CHFL_VOICED_OR_OPPED)) && !((flags & CHFL_INVISIBLE) && !(flags & CHFL_VOICED_OR_OPPED))) {
4118 /* Send the notification to the channel */
4119 sendcmdto_channel_butserv_butone(jbuf->jb_source, CMD_JOIN, chan, NULL, 0, "%H", chan);
4121 /* send an op, too, if needed */
4122 if (flags & CHFL_CHANOP && (oplevel < MAXOPLEVEL || !MyUser(jbuf->jb_source)))
4123 sendcmdto_channel_butserv_butone((chan->mode.apass[0] ? &his : jbuf->jb_source),
4124 CMD_MODE, chan, NULL, 0, "%H +o %C",
4125 chan, jbuf->jb_source);
4126 } else if (MyUser(jbuf->jb_source)) {
4127 sendcmdto_one(jbuf->jb_source, CMD_JOIN, jbuf->jb_source, ":%H", chan);
4131 if (jbuf->jb_type == JOINBUF_TYPE_PARTALL ||
4132 jbuf->jb_type == JOINBUF_TYPE_JOIN || is_local)
4133 return; /* don't send to remote */
4135 /* figure out if channel name will cause buffer to be overflowed */
4136 len = chan ? strlen(chan->chname) + 1 : 2;
4137 if (jbuf->jb_strlen + len > BUFSIZE)
4138 joinbuf_flush(jbuf);
4140 /* add channel to list of channels to send and update counts */
4141 jbuf->jb_channels[jbuf->jb_count++] = chan;
4142 jbuf->jb_strlen += len;
4144 /* if we've used up all slots, flush */
4145 if (jbuf->jb_count >= MAXJOINARGS)
4146 joinbuf_flush(jbuf);
4150 * Flush the channel list to remote servers
4153 joinbuf_flush(struct JoinBuf *jbuf)
4155 char chanlist[BUFSIZE];
4159 if (!jbuf->jb_count || jbuf->jb_type == JOINBUF_TYPE_PARTALL ||
4160 jbuf->jb_type == JOINBUF_TYPE_JOIN)
4161 return 0; /* no joins to process */
4163 for (i = 0; i < jbuf->jb_count; i++) { /* build channel list */
4164 build_string(chanlist, &chanlist_i,
4165 jbuf->jb_channels[i] ? jbuf->jb_channels[i]->chname : "0", 0,
4166 i == 0 ? '\0' : ',');
4167 if (JOINBUF_TYPE_PART == jbuf->jb_type)
4168 /* Remove user from channel */
4169 remove_user_from_channel(jbuf->jb_source, jbuf->jb_channels[i]);
4171 jbuf->jb_channels[i] = 0; /* mark slot empty */
4174 jbuf->jb_count = 0; /* reset base counters */
4175 jbuf->jb_strlen = ((jbuf->jb_type == JOINBUF_TYPE_PART ?
4176 STARTJOINLEN : STARTCREATELEN) +
4177 (jbuf->jb_comment ? strlen(jbuf->jb_comment) + 2 : 0));
4179 /* and send the appropriate command */
4180 switch (jbuf->jb_type) {
4181 case JOINBUF_TYPE_CREATE:
4182 sendcmdto_serv_butone(jbuf->jb_source, CMD_CREATE, jbuf->jb_connect,
4183 "%s %Tu", chanlist, jbuf->jb_create);
4186 case JOINBUF_TYPE_PART:
4187 sendcmdto_serv_butone(jbuf->jb_source, CMD_PART, jbuf->jb_connect,
4188 jbuf->jb_comment ? "%s :%s" : "%s", chanlist,
4196 /* Returns TRUE (1) if client is invited, FALSE (0) if not */
4197 int IsInvited(struct Client* cptr, const void* chptr)
4201 for (lp = (cli_user(cptr))->invited; lp; lp = lp->next)
4202 if (lp->value.chptr == chptr)
4207 /* RevealDelayedJoin: sends a join for a hidden user */
4209 void RevealDelayedJoin(struct Membership *member)
4211 ClearDelayedJoin(member);
4212 sendcmdto_channel_butserv_butone(member->user, CMD_JOIN, member->channel, member->user, 0, ":%H",
4214 CheckDelayedJoins(member->channel);
4217 /* CheckDelayedJoins: checks and clear +d if necessary */
4219 void CheckDelayedJoins(struct Channel *chan)
4221 if ((chan->mode.mode & MODE_WASDELJOINS) && !find_delayed_joins(chan)) {
4222 chan->mode.mode &= ~MODE_WASDELJOINS;
4223 sendcmdto_channel_butserv_butone(&me, CMD_MODE, chan, NULL, 0,
4225 sendcmdto_channel_servers_butone(&me, CMD_MODE, chan, NULL, 0,
4230 void CheckEnableDelayedJoins(struct Channel *chan) {
4231 if (!(chan->mode.mode & MODE_WASDELJOINS) && find_delayed_joins(chan)) {
4232 chan->mode.mode |= MODE_WASDELJOINS;
4233 sendcmdto_channel_butserv_butone(&me, CMD_MODE, chan, NULL, 0,
4235 sendcmdto_channel_servers_butone(&me, CMD_MODE, chan, NULL, 0,
4240 /* checks whether a channel is nonpersistent with no users and deletes it
4241 * returns 1 if deleted, otherwise 0
4243 signed int destruct_nonpers_channel(struct Channel *chptr) {
4244 if(!(chptr->mode.mode & MODE_PERSIST) && chptr->users == 0) {
4245 if(chptr->destruct_event)
4246 remove_destruct_event(chptr);
4247 destruct_channel(chptr);
4253 /** Send a join for the user if (s)he is a hidden member of the channel.
4255 void RevealDelayedJoinIfNeeded(struct Client *sptr, struct Channel *chptr)
4257 struct Membership *member = find_member_link(chptr, sptr);
4258 if (member && IsDelayedJoin(member) && !IsInvisibleJoin(member))
4259 RevealDelayedJoin(member);
4262 /** Extended multi target message block check.
4263 * The channelmode MODE_NOAMSGS prevents multi-target messages from being sent
4264 * to the channel. Since many clients sent these so called AMSGS manually with
4265 * one PRIVMSG per channel, we have this extended check which prevents messages
4266 * from being sent to multiple channels.
4268 * The check is quite simple: We save the last sent message of every client.
4269 * When the client sends a new PRIVMSG to another channel, we compare the
4270 * message to the previously sent message and if they equal we may drop the new
4271 * message instead of broadcasting it.
4272 * There are several additional checks. That is, the new message must be sent in
4273 * a specific amount of time in which this check works. If the ducplicate
4274 * message is delayed for too long then it will pass this check. Furthermore,
4275 * there is a specific number a message must be already sent to different
4276 * channels until it is blocked.
4277 * Both numbers can be configured by the FEATURES subsystem.
4279 * This function returns 0 if the message may pass and 1 if the message should
4281 * For this function to work properly it must be called on every PRIVMSG which
4282 * is sent by any user.
4284 * Since users are creative and sometimes smart (damnit!) this function can be
4285 * outsourced into a dynamic library so we can adjust this function to protect
4286 * against any user scripts on-the-fly.
4290 int ext_amsg_block(struct Client *cptr, struct Channel *chptr, const char *msg)
4294 /* First on every message we check whether the mechanism is enabled.
4295 * If it is enabled, we check:
4296 * - whether the channel has MODE_NOAMSGS
4297 * - whether it was sent in between the configured time span
4298 * - whether it matches the previous message
4299 * in exactly this order. If at least one test fails, we do not block the
4301 * If at least one test failed we copy the message into the users buffer so
4302 * it will be checked the next time he sends a message. We also update the
4303 * timestamp of the user.
4305 amsg_time = feature_int(FEAT_NOAMSG_TIME);
4307 /* first of all strip the message (filter out invisible content) */
4308 char *stripped_message = MyMalloc(BUFSIZE + 1);
4309 strcpy(stripped_message, msg);
4310 char p = stripped_message[0];
4312 int is_visible = 1, is_ccode = 0, i = 0, j = 0;
4314 for(i = 0; p != '\n'; p = stripped_message[++i]) {
4318 } else if(is_ccode) {
4319 if((p >= 48 && p <= 57) || p == 44) {
4329 if(p != codes[j++]) {
4334 //END of color code...
4336 if(is_ccode != 1 && codes[j] != 0) is_ccode = 3;
4340 for(k = 0; k < j-1; k++) {
4341 if(codes[k] != 48) {
4347 } else if(is_ccode == 2) {
4349 } else if(is_ccode == 3) {
4357 stripped_message[p_pos++] = p;
4360 stripped_message[p_pos++] = 0;
4361 /* Allocate a new buffer if there is none, yet. */
4362 if(!cli_user(cptr)->lastmsg) {
4363 cli_user(cptr)->lastmsg = MyMalloc(BUFSIZE + 1);
4364 memset(cli_user(cptr)->lastmsg, 0, BUFSIZE + 1);
4366 if((chptr->mode.mode & MODE_NOAMSGS) &&
4367 ((cli_user(cptr)->lastmsg_time + amsg_time) >= CurrentTime) &&
4368 (strcmp(cli_user(cptr)->lastmsg, stripped_message) == 0)) {
4369 cli_user(cptr)->lastmsg_time = CurrentTime;
4370 cli_user(cptr)->lastmsg_num++;
4371 MyFree(stripped_message);
4372 if(cli_user(cptr)->lastmsg_num >= feature_int(FEAT_NOAMSG_NUM)) return 1;
4375 /* Message did not match so update the data. */
4376 cli_user(cptr)->lastmsg_time = CurrentTime;
4377 cli_user(cptr)->lastmsg_num = 0;
4378 strcpy(cli_user(cptr)->lastmsg, stripped_message);
4379 MyFree(stripped_message);
4384 /** Extended flood check.
4385 * The channelmode MODE_NOFLOOD prevents users from flooding the channel.
4387 * This function returns 0 if the message may pass and 1 if the message should
4389 * For this function to work properly it must be called on every PRIVMSG which
4390 * is sent by any user.
4394 int ext_noflood_block(struct Client *cptr, struct Channel *chptr) {
4395 if(!*chptr->mode.noflood) return 0;
4396 struct Membership *member = find_member_link(chptr, cptr);
4397 if(!member) return 0; //TODO: we've no check for -n channels implemented, yet
4398 //check if this user is really affected by +f
4399 unsigned int flags = (chptr->mode.noflood_value & 0x00000007); //0000 0000 0000 0000 0000 0000 0000 0111 = 0x00000007 >> 0
4400 unsigned int count = (chptr->mode.noflood_value & 0x00001ff8) >> 3; //0000 0000 0000 0000 0001 1111 1111 1000 = 0x00001ff8 >> 3
4401 int time = (chptr->mode.noflood_value & 0x07ffe000) >> 13; //0000 0111 1111 1111 1110 0000 0000 0000 = 0x07ffe000 >> 13
4402 if(count == 0 || time == 0) return 0;
4403 if(!(flags & FLFL_NOFLOOD) && HasPriv(cptr, PRIV_FLOOD))
4405 if(!(flags & FLFL_CHANOP) && (member->status & CHFL_CHANOP))
4407 if(!(flags & (FLFL_CHANOP | FLFL_VOICE)) && (member->status & CHFL_VOICE))
4410 struct MemberFlood *floodnode, *prev_floodnode;
4411 for (floodnode = member->flood; floodnode; floodnode = floodnode->next_memberflood) {
4412 if(floodnode->time + time > CurrentTime) {
4413 if(floodcount == 0 && floodnode != member->flood) {
4415 prev_floodnode->next_memberflood = free_MemberFlood;
4416 free_MemberFlood = prev_floodnode;
4417 member->flood = floodnode;
4421 prev_floodnode = floodnode;
4423 Debug((DEBUG_INFO, "floodcount: %i", floodcount));
4424 if(floodcount >= count) return 1; //blocked!
4425 //add a new floodnode :)
4426 if(free_MemberFlood) {
4427 floodnode = free_MemberFlood;
4428 free_MemberFlood = floodnode->next_memberflood;
4430 floodnode = (struct MemberFlood*) MyMalloc(sizeof(struct MemberFlood));
4431 floodnode->time = CurrentTime;
4432 floodnode->next_memberflood = NULL;
4434 prev_floodnode->next_memberflood = floodnode;
4436 member->flood = floodnode;