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 struct Ban *find_ban(struct Client *cptr, 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 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. */
443 * This function returns true if the user is banned on the said channel.
444 * This function will check the ban cache if applicable, otherwise will
445 * do the comparisons and cache the result.
447 * @param[in] member The Membership to test for banned-ness.
448 * @return Non-zero if the member is banned, zero if not.
450 static int is_banned(struct Membership* member)
452 if (IsBanValid(member))
453 return IsBanned(member);
456 if (find_ban(member->user, member->channel->banlist)) {
465 /** add a user to a channel.
466 * adds a user to a channel by adding another link to the channels member
469 * @param chptr The channel to add to.
470 * @param who The user to add.
471 * @param flags The flags the user gets initially.
472 * @param oplevel The oplevel the user starts with.
474 void add_user_to_channel(struct Channel* chptr, struct Client* who,
475 unsigned int flags, int oplevel)
482 struct Membership* member = membershipFreeList;
484 membershipFreeList = member->next_member;
486 member = (struct Membership*) MyMalloc(sizeof(struct Membership));
487 ++membershipAllocCount;
492 member->channel = chptr;
493 member->status = flags;
494 member->flood = NULL;
495 SetOpLevel(member, oplevel);
497 member->next_member = chptr->members;
498 if (member->next_member)
499 member->next_member->prev_member = member;
500 member->prev_member = 0;
501 chptr->members = member;
503 member->next_channel = (cli_user(who))->channel;
504 if (member->next_channel)
505 member->next_channel->prev_channel = member;
506 member->prev_channel = 0;
507 (cli_user(who))->channel = member;
509 if (chptr->destruct_event)
510 remove_destruct_event(chptr);
512 ++((cli_user(who))->joined);
516 /** Remove a person from a channel, given their Membership*
518 * @param member A member of a channel.
520 * @returns true if there are more people in the channel.
522 static int remove_member_from_channel(struct Membership* member)
524 struct Channel* chptr;
526 chptr = member->channel;
528 * unlink channel member list
530 if (member->next_member)
531 member->next_member->prev_member = member->prev_member;
532 if (member->prev_member)
533 member->prev_member->next_member = member->next_member;
535 member->channel->members = member->next_member;
538 * If this is the last delayed-join user, may have to clear WASDELJOINS.
540 if (IsDelayedJoin(member))
541 CheckDelayedJoins(chptr);
544 * unlink client channel list
546 if (member->next_channel)
547 member->next_channel->prev_channel = member->prev_channel;
548 if (member->prev_channel)
549 member->prev_channel->next_channel = member->next_channel;
551 (cli_user(member->user))->channel = member->next_channel;
553 --(cli_user(member->user))->joined;
555 member->flood = NULL;
557 member->next_member = membershipFreeList;
558 membershipFreeList = member;
560 return sub1_from_channel(chptr);
563 /** Check if all the remaining members on the channel are zombies
565 * @returns False if the channel has any non zombie members, True otherwise.
568 static int channel_all_zombies(struct Channel* chptr)
570 struct Membership* member;
572 /* Though, there are no real users we pretend this channel to have members
573 * to protect it from being destroyed.
575 if(chptr->mode.mode & MODE_PERSIST)
578 for (member = chptr->members; member; member = member->next_member) {
579 if (!IsZombie(member))
586 /** Remove a user from a channel
587 * This is the generic entry point for removing a user from a channel, this
588 * function will remove the client from the channel, and destroy the channel
589 * if there are no more normal users left.
591 * @param cptr The client
592 * @param chptr The channel
594 void remove_user_from_channel(struct Client* cptr, struct Channel* chptr)
597 struct Membership* member;
600 if ((member = find_member_link(chptr, cptr))) {
601 if (remove_member_from_channel(member)) {
602 if (channel_all_zombies(chptr)) {
604 * XXX - this looks dangerous but isn't if we got the referential
605 * integrity right for channels
607 while (remove_member_from_channel(chptr->members))
614 /** Remove a user from all channels they are on.
616 * This function removes a user from all channels they are on.
618 * @param cptr The client to remove.
620 void remove_user_from_all_channels(struct Client* cptr)
622 struct Membership* chan;
624 assert(0 != cli_user(cptr));
626 while ((chan = (cli_user(cptr))->channel))
627 remove_user_from_channel(cptr, chan->channel);
630 /** Check if this user is a legitimate chanop
632 * @param cptr Client to check
633 * @param chptr Channel to check
635 * @returns True if the user is a chanop (And not a zombie), False otherwise.
638 int is_chan_op(struct Client *cptr, struct Channel *chptr)
640 struct Membership* member;
642 if ((member = find_member_link(chptr, cptr)))
643 return (!IsZombie(member) && IsChanOp(member));
648 /** Check if a user is a Zombie on a specific channel.
650 * @param cptr The client to check.
651 * @param chptr The channel to check.
653 * @returns True if the client (cptr) is a zombie on the channel (chptr),
658 int is_zombie(struct Client *cptr, struct Channel *chptr)
660 struct Membership* member;
664 if ((member = find_member_link(chptr, cptr)))
665 return IsZombie(member);
669 /** Returns if a user has voice on a channel.
671 * @param cptr The client
672 * @param chptr The channel
674 * @returns True if the client (cptr) is voiced on (chptr) and is not a zombie.
677 int has_voice(struct Client* cptr, struct Channel* chptr)
679 struct Membership* member;
682 if ((member = find_member_link(chptr, cptr)))
683 return (!IsZombie(member) && HasVoice(member));
688 /** Can this member send to a channel
690 * A user can speak on a channel iff:
692 * <li> They didn't use the Apass to gain ops.
693 * <li> They are op'd or voice'd.
694 * <li> You aren't banned.
695 * <li> The channel isn't +m
696 * <li> The channel isn't +n or you are on the channel.
699 * This function will optionally reveal a user on a delayed join channel if
700 * they are allowed to send to the channel.
702 * @param member The membership of the user
703 * @param reveal If true, the user will be "revealed" on a delayed
706 * @returns True if the client can speak on the channel.
708 int member_can_send_to_channel(struct Membership* member, int reveal)
712 /* Do not check for users on other servers: This should be a
713 * temporary desynch, or maybe they are on an older server, but
714 * we do not want to send ERR_CANNOTSENDTOCHAN more than once.
715 * Also allow XtraOps to be always able to speak.
717 if (!MyUser(member->user) || IsXtraOp(member->user))
719 if (IsDelayedJoin(member) && !IsInvisibleJoin(member) && reveal)
720 RevealDelayedJoin(member);
724 /* Discourage using the Apass to get op. They should use the Upass. */
725 if (IsChannelManager(member) && member->channel->mode.apass[0])
728 /* If you have voice or ops, you can speak. */
729 if (IsVoicedOrOpped(member))
733 * If it's moderated, and you aren't a privileged user, you can't
736 if (member->channel->mode.mode & MODE_MODERATED)
739 /* If only logged in users may join and you're not one, you can't speak. */
740 if (member->channel->mode.mode & MODE_REGONLY && !IsAccount(member->user))
743 /* If you're banned then you can't speak either. */
744 if (is_banned(member))
747 if (IsDelayedJoin(member) && reveal && !IsInvisibleJoin(member))
748 RevealDelayedJoin(member);
753 /** Check if a client can send to a channel.
755 * Has the added check over member_can_send_to_channel() of servers can
758 * @param cptr The client to check
759 * @param chptr The channel to check
760 * @param reveal If the user should be revealed (see
761 * member_can_send_to_channel())
763 * @returns true if the client is allowed to speak on the channel, false
766 * @see member_can_send_to_channel()
768 int client_can_send_to_channel(struct Client *cptr, struct Channel *chptr, int reveal)
770 struct Membership *member;
773 * Servers and extra ops can always speak on channels.
775 if (IsServer(cptr) || IsXtraOp(cptr))
778 member = find_channel_member(cptr, chptr);
781 * You can't speak if you're off channel, and it is +n (no external messages)
785 if ((chptr->mode.mode & (MODE_NOPRIVMSGS|MODE_MODERATED)) ||
786 ((chptr->mode.mode & MODE_REGONLY) && !IsAccount(cptr)))
789 return !find_ban(cptr, chptr->banlist);
791 return member_can_send_to_channel(member, reveal);
794 /** Returns the name of a channel that prevents the user from changing nick.
795 * if a member and not (opped or voiced) and (banned or moderated), return
796 * the name of the first channel banned on.
798 * @param cptr The client
800 * @returns the name of the first channel banned on, or NULL if the user
803 const char* find_no_nickchange_channel(struct Client* cptr)
806 struct Membership* member;
807 for (member = (cli_user(cptr))->channel; member;
808 member = member->next_channel) {
809 if (IsVoicedOrOpped(member))
811 if ((member->channel->mode.mode & MODE_MODERATED)
812 || (member->channel->mode.mode & MODE_REGONLY && !IsAccount(cptr))
813 || is_banned(member))
814 return member->channel->chname;
821 /** Fill mbuf/pbuf with modes from chptr
822 * write the "simple" list of channel modes for channel chptr onto buffer mbuf
823 * with the parameters in pbuf as visible by cptr.
825 * This function will hide keys from non-op'd, non-server clients.
827 * @param cptr The client to generate the mode for.
828 * @param mbuf The buffer to write the modes into.
829 * @param pbuf The buffer to write the mode parameters into.
830 * @param buflen The length of the buffers.
831 * @param chptr The channel to get the modes from.
832 * @param member The membership of this client on this channel (or NULL
833 * if this client isn't on this channel)
836 void channel_modes(struct Client *cptr, char *mbuf, char *pbuf, int buflen,
837 struct Channel *chptr, struct Membership *member)
839 int previous_parameter = 0;
846 if (chptr->mode.mode & MODE_SECRET)
848 else if (chptr->mode.mode & MODE_PRIVATE)
850 if (chptr->mode.mode & MODE_MODERATED)
852 if (chptr->mode.mode & MODE_TOPICLIMIT)
854 if (chptr->mode.mode & MODE_INVITEONLY)
856 if (chptr->mode.mode & MODE_NOPRIVMSGS)
858 if (chptr->mode.mode & MODE_REGONLY)
860 if (chptr->mode.mode & MODE_DELJOINS)
862 else if (MyUser(cptr) && (chptr->mode.mode & MODE_WASDELJOINS))
864 if (chptr->mode.mode & MODE_NOCOLOUR)
866 if (chptr->mode.mode & MODE_NOCTCP)
868 if (chptr->mode.mode & MODE_PERSIST)
870 if (chptr->mode.mode & MODE_REGISTERED)
872 if (chptr->mode.mode & MODE_NONOTICE)
874 if (chptr->mode.mode & MODE_NOAMSGS)
876 if (chptr->mode.mode & MODE_QUARANTINE)
878 if (chptr->mode.mode & MODE_AUDITORIUM)
880 if (chptr->mode.limit) {
882 ircd_snprintf(0, pbuf, buflen, "%u", chptr->mode.limit);
883 previous_parameter = 1;
885 if (chptr->mode.access) {
887 if (previous_parameter)
889 ircd_snprintf(0, pbuf, buflen, "%u", chptr->mode.access);
890 previous_parameter = 1;
892 if (*chptr->mode.altchan) {
894 if (previous_parameter)
896 strcat(pbuf, chptr->mode.altchan);
897 previous_parameter = 1;
899 if (*chptr->mode.noflood) {
901 if (previous_parameter)
903 strcat(pbuf, chptr->mode.noflood);
904 previous_parameter = 1;
906 if (*chptr->mode.key) {
908 if (previous_parameter)
910 if (is_chan_op(cptr, chptr) || IsServer(cptr) || IsOper(cptr)) {
911 strcat(pbuf, chptr->mode.key);
914 previous_parameter = 1;
916 if (*chptr->mode.apass) {
918 if (previous_parameter)
920 if (IsServer(cptr) || IsOper(cptr)) {
921 strcat(pbuf, chptr->mode.apass);
924 previous_parameter = 1;
926 if (*chptr->mode.upass) {
928 if (previous_parameter)
930 if (IsServer(cptr) || (member && IsChanOp(member) && OpLevel(member) == 0) || IsOper(cptr)) {
931 strcat(pbuf, chptr->mode.upass);
938 /** Compare two members oplevel
940 * @param mp1 Pointer to a pointer to a membership
941 * @param mp2 Pointer to a pointer to a membership
943 * @returns 0 if equal, -1 if mp1 is lower, +1 otherwise.
947 int compare_member_oplevel(const void *mp1, const void *mp2)
949 struct Membership const* member1 = *(struct Membership const**)mp1;
950 struct Membership const* member2 = *(struct Membership const**)mp2;
951 if (member1->oplevel == member2->oplevel)
953 return (member1->oplevel < member2->oplevel) ? -1 : 1;
956 /* send "cptr" a full list of the modes for channel chptr.
958 * Sends a BURST line to cptr, bursting all the modes for the channel.
960 * @param cptr Client pointer
961 * @param chptr Channel pointer
963 void send_channel_modes(struct Client *cptr, struct Channel *chptr)
965 /* The order in which modes are generated is now mandatory */
966 static unsigned int current_flags[4] =
967 { 0, CHFL_VOICE, CHFL_CHANOP, CHFL_CHANOP | CHFL_VOICE };
973 struct Membership* member;
975 char modebuf[MODEBUFLEN];
976 char parabuf[MODEBUFLEN];
978 int number_of_ops = 0;
979 int opped_members_index = 0;
980 struct Membership** opped_members = NULL;
981 int last_oplevel = 0;
982 int send_oplevels = 0;
987 if (IsLocalChannel(chptr->chname))
990 member = chptr->members;
991 lp2 = chptr->banlist;
993 *modebuf = *parabuf = '\0';
994 channel_modes(cptr, modebuf, parabuf, sizeof(parabuf), chptr, 0);
996 for (first = 1; full; first = 0) /* Loop for multiple messages */
998 full = 0; /* Assume by default we get it
999 all in one message */
1001 /* (Continued) prefix: "<Y> B <channel> <TS>" */
1002 /* is there any better way we can do this? */
1003 mb = msgq_make(&me, "%C " TOK_BURST " %H %Tu", &me, chptr,
1004 chptr->creationtime);
1006 if (first && modebuf[1]) /* Add simple modes (Aiklmnpstu)
1009 /* prefix: "<Y> B <channel> <TS>[ <modes>[ <params>]]" */
1010 msgq_append(&me, mb, " %s", modebuf);
1013 msgq_append(&me, mb, " %s", parabuf);
1017 * Attach nicks, comma separated " nick[:modes],nick[:modes],..."
1019 * First find all opless members.
1020 * Run 2 times over all members, to group the members with
1021 * and without voice together.
1022 * Then run 2 times over all opped members (which are ordered
1023 * by op-level) to also group voice and non-voice together.
1025 for (first = 1; flag_cnt < 4; new_mode = 1, ++flag_cnt)
1029 if (flag_cnt < 2 && IsChanOp(member))
1032 * The first loop (to find all non-voice/op), we count the ops.
1033 * The second loop (to find all voiced non-ops), store the ops
1034 * in a dynamic array.
1039 opped_members[opped_members_index++] = member;
1040 /* We also send oplevels if anyone is below the weakest level. */
1041 if (OpLevel(member) < MAXOPLEVEL)
1044 /* Only handle the members with the flags that we are interested in. */
1045 if ((member->status & CHFL_VOICED_OR_OPPED) == current_flags[flag_cnt])
1047 if (msgq_bufleft(mb) < NUMNICKLEN + 3 + MAXOPLEVELDIGITS)
1048 /* The 3 + MAXOPLEVELDIGITS is a possible ",:v999". */
1050 full = 1; /* Make sure we continue after
1051 sending it so far */
1052 /* Ensure the new BURST line contains the current
1053 * ":mode", except when there is no mode yet. */
1054 new_mode = (flag_cnt > 0) ? 1 : 0;
1055 break; /* Do not add this member to this message */
1057 msgq_append(&me, mb, "%c%C", first ? ' ' : ',', member->user);
1058 first = 0; /* From now on, use commas to add new nicks */
1061 * Do we have a nick with a new mode ?
1062 * Or are we starting a new BURST line?
1067 * This means we are at the _first_ member that has only
1068 * voice, or the first member that has only ops, or the
1069 * first member that has voice and ops (so we get here
1070 * at most three times, plus once for every start of
1071 * a continued BURST line where only these modes is current.
1072 * In the two cases where the current mode includes ops,
1073 * we need to add the _absolute_ value of the oplevel to the mode.
1075 char tbuf[3 + MAXOPLEVELDIGITS] = ":";
1078 if (HasVoice(member)) /* flag_cnt == 1 or 3 */
1080 if (IsChanOp(member)) /* flag_cnt == 2 or 3 */
1082 /* append the absolute value of the oplevel */
1084 loc += ircd_snprintf(0, tbuf + loc, sizeof(tbuf) - loc, "%u", last_oplevel = member->oplevel);
1089 msgq_append(&me, mb, tbuf);
1092 else if (send_oplevels && flag_cnt > 1 && last_oplevel != member->oplevel)
1095 * This can't be the first member of a (continued) BURST
1096 * message because then either flag_cnt == 0 or new_mode == 1
1097 * Now we need to append the incremental value of the oplevel.
1099 char tbuf[2 + MAXOPLEVELDIGITS];
1100 ircd_snprintf(0, tbuf, sizeof(tbuf), ":%u", member->oplevel - last_oplevel);
1101 last_oplevel = member->oplevel;
1102 msgq_append(&me, mb, tbuf);
1105 /* Go to the next `member'. */
1107 member = member->next_member;
1109 member = opped_members[++opped_members_index];
1114 /* Point `member' at the start of the list again. */
1117 member = chptr->members;
1118 /* Now, after one loop, we know the number of ops and can
1119 * allocate the dynamic array with pointer to the ops. */
1120 opped_members = (struct Membership**)
1121 MyMalloc((number_of_ops + 1) * sizeof(struct Membership*));
1122 opped_members[number_of_ops] = NULL; /* Needed for loop termination */
1126 /* At the end of the second loop, sort the opped members with
1127 * increasing op-level, so that we will output them in the
1128 * correct order (and all op-level increments stay positive) */
1130 qsort(opped_members, number_of_ops,
1131 sizeof(struct Membership*), compare_member_oplevel);
1132 /* The third and fourth loop run only over the opped members. */
1133 member = opped_members[(opped_members_index = 0)];
1136 } /* loop over 0,+v,+o,+ov */
1140 /* Attach all bans, space separated " :%ban ban ..." */
1141 for (first = 2; lp2; lp2 = lp2->next)
1143 len = strlen(lp2->banstr);
1144 if (msgq_bufleft(mb) < len + 1 + first)
1145 /* The +1 stands for the added ' '.
1146 * The +first stands for the added ":%".
1152 msgq_append(&me, mb, " %s%s", first ? ":%" : "",
1158 send_buffer(cptr, mb, 0); /* Send this message */
1160 } /* Continue when there was something
1161 that didn't fit (full==1) */
1163 MyFree(opped_members);
1164 if (feature_bool(FEAT_TOPIC_BURST) && (chptr->topic[0] != '\0'))
1165 sendcmdto_one(&me, CMD_TOPIC, cptr, "%H %Tu %Tu :%s", chptr,
1166 chptr->creationtime, chptr->topic_time, chptr->topic);
1169 /** Canonify a mask.
1172 * @author Carlo Wood (Run),
1175 * When the nick is longer then NICKLEN, it is cut off (its an error of course).
1176 * When the user name or host name are too long (USERLEN and HOSTLEN
1177 * respectively) then they are cut off at the start with a '*'.
1179 * The following transformations are made:
1181 * 1) xxx -> nick!*@*
1182 * 2) xxx.xxx -> *!*\@host
1183 * 3) xxx\!yyy -> nick!user\@*
1184 * 4) xxx\@yyy -> *!user\@host
1185 * 5) xxx!yyy\@zzz -> nick!user\@host
1187 * @param mask The uncanonified mask.
1188 * @returns The updated mask in a static buffer.
1190 char *pretty_mask(char *mask)
1192 static char star[2] = { '*', 0 };
1193 static char retmask[NICKLEN + USERLEN + HOSTLEN + 3];
1194 char *last_dot = NULL;
1197 /* Case 1: default */
1202 /* Do a _single_ pass through the characters of the mask: */
1203 for (ptr = mask; *ptr; ++ptr)
1207 /* Case 3 or 5: Found first '!' (without finding a '@' yet) */
1211 else if (*ptr == '@')
1213 /* Case 4: Found last '@' (without finding a '!' yet) */
1218 else if (*ptr == '.' || *ptr == ':')
1220 /* Case 2: Found character specific to IP or hostname (without
1221 * finding a '!' or '@' yet) */
1231 /* Case 4 or 5: Found last '@' */
1237 if (user == star && last_dot)
1247 char *nick_end = (user != star) ? user - 1 : ptr;
1248 if (nick_end - nick > NICKLEN)
1254 char *user_end = (host != star) ? host - 1 : ptr;
1255 if (user_end - user > USERLEN)
1257 user = user_end - USERLEN;
1262 if (host != star && ptr - host > HOSTLEN)
1264 host = ptr - HOSTLEN;
1267 ircd_snprintf(0, retmask, sizeof(retmask), "%s!%s@%s", nick, user, host);
1271 /** send a banlist to a client for a channel
1273 * @param cptr Client to send the banlist to.
1274 * @param chptr Channel whose banlist to send.
1276 static void send_ban_list(struct Client* cptr, struct Channel* chptr)
1283 for (lp = chptr->banlist; lp; lp = lp->next)
1284 send_reply(cptr, RPL_BANLIST, chptr->chname, lp->banstr, lp->who, lp->when);
1286 send_reply(cptr, RPL_ENDOFBANLIST, chptr->chname);
1289 /** Get a channel block, creating if necessary.
1290 * Get Channel block for chname (and allocate a new channel
1291 * block, if it didn't exists before).
1293 * @param cptr Client joining the channel.
1294 * @param chname The name of the channel to join.
1295 * @param flag set to CGT_CREATE to create the channel if it doesn't
1298 * @returns NULL if the channel is invalid, doesn't exist and CGT_CREATE
1299 * wasn't specified or a pointer to the channel structure
1301 struct Channel *get_channel(struct Client *cptr, char *chname, ChannelGetType flag)
1303 struct Channel *chptr;
1306 if (EmptyString(chname))
1309 len = strlen(chname);
1310 if (MyUser(cptr) && len > CHANNELLEN)
1313 *(chname + CHANNELLEN) = '\0';
1315 if ((chptr = FindChannel(chname)))
1317 if (flag == CGT_CREATE)
1319 chptr = (struct Channel*) MyMalloc(sizeof(struct Channel) + len);
1321 ++UserStats.channels;
1322 memset(chptr, 0, sizeof(struct Channel));
1323 strcpy(chptr->chname, chname);
1324 if (GlobalChannelList)
1325 GlobalChannelList->prev = chptr;
1327 chptr->next = GlobalChannelList;
1328 chptr->creationtime = MyUser(cptr) ? TStime() : (time_t) 0;
1329 GlobalChannelList = chptr;
1335 /** invite a user to a channel.
1337 * Adds an invite for a user to a channel. Limits the number of invites
1338 * to FEAT_MAXCHANNELSPERUSER. Does not sent notification to the user.
1340 * @param cptr The client to be invited.
1341 * @param chptr The channel to be invited to.
1343 void add_invite(struct Client *cptr, struct Channel *chptr)
1345 struct SLink *inv, **tmp;
1346 unsigned int maxchans;
1348 del_invite(cptr, chptr);
1350 * Delete last link in chain if the list is max length
1352 assert(list_length((cli_user(cptr))->invited) == (cli_user(cptr))->invites);
1353 maxchans = cli_confs(cptr)->value.aconf ? ConfMaxChannels(cli_confs(cptr)->value.aconf) : feature_int(FEAT_MAXCHANNELSPERUSER);
1354 if (((cli_user(cptr))->invites >= maxchans && !HasPriv(cptr, PRIV_CHAN_LIMIT)) || cli_user(cptr)->invites > 100) /* Hard limit of 100. */
1355 del_invite(cptr, (cli_user(cptr))->invited->value.chptr);
1357 * Add client to channel invite list
1360 inv->value.cptr = cptr;
1361 inv->next = chptr->invites;
1362 chptr->invites = inv;
1364 * Add channel to the end of the client invite list
1366 for (tmp = &((cli_user(cptr))->invited); *tmp; tmp = &((*tmp)->next));
1368 inv->value.chptr = chptr;
1371 (cli_user(cptr))->invites++;
1374 /** Delete an invite
1375 * Delete Invite block from channel invite list and client invite list
1377 * @param cptr Client pointer
1378 * @param chptr Channel pointer
1380 void del_invite(struct Client *cptr, struct Channel *chptr)
1382 struct SLink **inv, *tmp;
1384 for (inv = &(chptr->invites); (tmp = *inv); inv = &tmp->next)
1385 if (tmp->value.cptr == cptr)
1390 (cli_user(cptr))->invites--;
1394 for (inv = &((cli_user(cptr))->invited); (tmp = *inv); inv = &tmp->next)
1395 if (tmp->value.chptr == chptr)
1404 /** @page zombie Explanation of Zombies
1408 * A channel member is turned into a zombie when he is kicked from a
1409 * channel but his server has not acknowledged the kick. Servers that
1410 * see the member as a zombie can accept actions he performed before
1411 * being kicked, without allowing chanop operations from outsiders or
1412 * desyncing the network.
1420 * X --a--> A --b--> B --d--> D
1425 * Where `who' is being KICK-ed by a "KICK" message received by server 'A'
1426 * via 'a', or on server 'B' via either 'b' or 'c', or on server D via 'd'.
1428 * a) On server A : set CHFL_ZOMBIE for `who' (lp) and pass on the KICK.
1429 * Remove the user immediately when no users are left on the channel.
1430 * b) On server B : remove the user (who/lp) from the channel, send a
1431 * PART upstream (to A) and pass on the KICK.
1432 * c) KICKed by `client'; On server B : remove the user (who/lp) from the
1433 * channel, and pass on the KICK.
1434 * d) On server D : remove the user (who/lp) from the channel, and pass on
1438 * - Setting the ZOMBIE flag never hurts, we either remove the
1439 * client after that or we don't.
1440 * - The KICK message was already passed on, as should be in all cases.
1441 * - `who' is removed in all cases except case a) when users are left.
1442 * - A PART is only sent upstream in case b).
1448 * 1 --- 2 --- 3 --- 4 --- 5
1453 * We also need to turn 'who' into a zombie on servers 1 and 6,
1454 * because a KICK from 'who' (kicking someone else in that direction)
1455 * can arrive there afterward - which should not be bounced itself.
1456 * Therefore case a) also applies for servers 1 and 6.
1461 /** Turn a user on a channel into a zombie
1462 * This function turns a user into a zombie (see \ref zombie)
1464 * @param member The structure representing this user on this channel.
1465 * @param who The client that is being kicked.
1466 * @param cptr The connection the kick came from.
1467 * @param sptr The client that is doing the kicking.
1468 * @param chptr The channel the user is being kicked from.
1470 void make_zombie(struct Membership* member, struct Client* who,
1471 struct Client* cptr, struct Client* sptr, struct Channel* chptr)
1473 assert(0 != member);
1478 /* Default for case a): */
1481 /* Case b) or c) ?: */
1482 if (MyUser(who)) /* server 4 */
1484 if (IsServer(cptr)) /* Case b) ? */
1485 sendcmdto_one(who, CMD_PART, cptr, "%H", chptr);
1486 remove_user_from_channel(who, chptr);
1489 if (cli_from(who) == cptr) /* True on servers 1, 5 and 6 */
1491 struct Client *acptr = IsServer(sptr) ? sptr : (cli_user(sptr))->server;
1492 for (; acptr != &me; acptr = (cli_serv(acptr))->up)
1493 if (acptr == (cli_user(who))->server) /* Case d) (server 5) */
1495 remove_user_from_channel(who, chptr);
1500 /* Case a) (servers 1, 2, 3 and 6) */
1501 if (channel_all_zombies(chptr))
1502 remove_user_from_channel(who, chptr);
1504 /* XXX Can't actually call Debug here; if the channel is all zombies,
1505 * chptr will no longer exist when we get here.
1506 Debug((DEBUG_INFO, "%s is now a zombie on %s", who->name, chptr->chname));
1510 /** returns the number of zombies on a channel
1511 * @param chptr Channel to count zombies in.
1513 * @returns The number of zombies on the channel.
1515 int number_of_zombies(struct Channel *chptr)
1517 struct Membership* member;
1521 for (member = chptr->members; member; member = member->next_member) {
1522 if (IsZombie(member))
1528 /** Concatenate some strings together.
1529 * This helper function builds an argument string in strptr, consisting
1530 * of the original string, a space, and str1 and str2 concatenated (if,
1531 * of course, str2 is not NULL)
1533 * @param strptr The buffer to concatenate into
1534 * @param strptr_i modified offset to the position to modify
1535 * @param str1 The string to concatenate from.
1536 * @param str2 The second string to contatenate from.
1537 * @param c Charactor to separate the string from str1 and str2.
1540 build_string(char *strptr, int *strptr_i, const char *str1,
1541 const char *str2, char c)
1544 strptr[(*strptr_i)++] = c;
1547 strptr[(*strptr_i)++] = *(str1++);
1551 strptr[(*strptr_i)++] = *(str2++);
1553 strptr[(*strptr_i)] = '\0';
1556 /** Flush out the modes
1557 * This is the workhorse of our ModeBuf suite; this actually generates the
1558 * output MODE commands, HACK notices, or whatever. It's pretty complicated.
1560 * @param mbuf The mode buffer to flush
1561 * @param all If true, flush all modes, otherwise leave partial modes in the
1567 modebuf_flush_int(struct ModeBuf *mbuf, int all)
1569 /* we only need the flags that don't take args right now */
1570 static ulong64 flags[] = {
1571 /* MODE_CHANOP, 'o', */
1572 /* MODE_VOICE, 'v', */
1575 MODE_MODERATED, 'm',
1576 MODE_TOPICLIMIT, 't',
1577 MODE_INVITEONLY, 'i',
1578 MODE_NOPRIVMSGS, 'n',
1581 MODE_REGISTERED, 'R',
1582 /* MODE_KEY, 'k', */
1583 /* MODE_BAN, 'b', */
1585 /* MODE_APASS, 'A', */
1586 /* MODE_UPASS, 'U', */
1590 /* MODE_ALTCHAN, 'F', */
1591 /* MODE_NOFLOOD, 'f', */
1595 MODE_QUARANTINE, 'Q',
1596 MODE_AUDITORIUM, 'u',
1599 static ulong64 local_flags[] = {
1600 MODE_WASDELJOINS, 'd',
1606 struct Client *app_source; /* where the MODE appears to come from */
1608 char addbuf[20], addbuf_local[20]; /* accumulates +psmtin, etc. */
1609 int addbuf_i = 0, addbuf_local_i = 0;
1610 char rembuf[20], rembuf_local[20]; /* accumulates -psmtin, etc. */
1611 int rembuf_i = 0, rembuf_local_i = 0;
1612 char *bufptr; /* we make use of indirection to simplify the code */
1615 char addstr[BUFSIZE]; /* accumulates MODE parameters to add */
1617 char remstr[BUFSIZE]; /* accumulates MODE parameters to remove */
1619 char *strptr; /* more indirection to simplify the code */
1622 int totalbuflen = BUFSIZE - 200; /* fuzz factor -- don't overrun buffer! */
1625 char limitbuf[20],accessbuf[20]; /* convert limits to strings */
1627 ulong64 limitdel = MODE_LIMIT;
1628 ulong64 accessdel = MODE_ACCESS;
1632 /* If the ModeBuf is empty, we have nothing to do */
1633 if (mbuf->mb_add == 0 && mbuf->mb_rem == 0 && mbuf->mb_count == 0)
1636 /* Ok, if we were given the OPMODE flag, or its a server, hide the source.
1638 if (feature_bool(FEAT_HIS_MODEWHO) &&
1639 (mbuf->mb_dest & MODEBUF_DEST_OPMODE ||
1640 IsServer(mbuf->mb_source) ||
1641 IsMe(mbuf->mb_source)))
1644 app_source = mbuf->mb_source;
1647 * Account for user we're bouncing; we have to get it in on the first
1648 * bounced MODE, or we could have problems
1650 if (mbuf->mb_dest & MODEBUF_DEST_DEOP)
1651 totalbuflen -= 6; /* numeric nick == 5, plus one space */
1653 /* Calculate the simple flags */
1654 for (flag_p = flags; flag_p[0]; flag_p += 2) {
1655 if (*flag_p & mbuf->mb_add)
1656 addbuf[addbuf_i++] = flag_p[1];
1657 else if (*flag_p & mbuf->mb_rem)
1658 rembuf[rembuf_i++] = flag_p[1];
1661 /* Some flags may be for local display only. */
1662 for (flag_p = local_flags; flag_p[0]; flag_p += 2) {
1663 if (*flag_p & mbuf->mb_add)
1664 addbuf_local[addbuf_local_i++] = flag_p[1];
1665 else if (*flag_p & mbuf->mb_rem)
1666 rembuf_local[rembuf_local_i++] = flag_p[1];
1669 /* Now go through the modes with arguments... */
1670 for (i = 0; i < mbuf->mb_count; i++) {
1671 if (MB_TYPE(mbuf, i) & MODE_ADD) { /* adding or removing? */
1673 bufptr_i = &addbuf_i;
1676 bufptr_i = &rembuf_i;
1679 if (MB_TYPE(mbuf, i) & (MODE_CHANOP | MODE_VOICE)) {
1680 tmp = strlen(cli_name(MB_CLIENT(mbuf, i)));
1682 if ((totalbuflen - IRCD_MAX(9, tmp)) <= 0) /* don't overflow buffer */
1683 MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
1685 bufptr[(*bufptr_i)++] = MB_TYPE(mbuf, i) & MODE_CHANOP ? 'o' : 'v';
1686 totalbuflen -= IRCD_MAX(9, tmp) + 1;
1688 } else if (MB_TYPE(mbuf, i) & (MODE_BAN | MODE_APASS | MODE_UPASS | MODE_ALTCHAN | MODE_NOFLOOD)) {
1689 tmp = strlen(MB_STRING(mbuf, i));
1691 if ((totalbuflen - tmp) <= 0) /* don't overflow buffer */
1692 MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
1695 switch(MB_TYPE(mbuf, i) & (MODE_BAN | MODE_APASS | MODE_UPASS | MODE_ALTCHAN | MODE_NOFLOOD))
1713 bufptr[(*bufptr_i)++] = mode_char;
1714 totalbuflen -= tmp + 1;
1716 } else if (MB_TYPE(mbuf, i) & MODE_KEY) {
1717 tmp = (mbuf->mb_dest & MODEBUF_DEST_NOKEY ? 1 :
1718 strlen(MB_STRING(mbuf, i)));
1720 if ((totalbuflen - tmp) <= 0) /* don't overflow buffer */
1721 MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
1723 bufptr[(*bufptr_i)++] = 'k';
1724 totalbuflen -= tmp + 1;
1726 } else if (MB_TYPE(mbuf, i) & (MODE_LIMIT)) {
1727 /* if it's a limit, we also format the number */
1728 ircd_snprintf(0, limitbuf, sizeof(limitbuf), "%u", MB_UINT(mbuf, i));
1730 tmp = strlen(limitbuf);
1732 if ((totalbuflen - tmp) <= 0) /* don't overflow buffer */
1733 MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
1735 bufptr[(*bufptr_i)++] = 'l';
1736 totalbuflen -= tmp + 1;
1738 } else if (MB_TYPE(mbuf, i) & (MODE_ACCESS)) {
1739 /* if it's a limit, we also format the number */
1740 ircd_snprintf(0, accessbuf, sizeof(accessbuf), "%u", MB_UINT(mbuf, i));
1742 tmp = strlen(accessbuf);
1744 if ((totalbuflen - tmp) <= 0) /* don't overflow buffer */
1745 MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
1747 bufptr[(*bufptr_i)++] = 'a';
1748 totalbuflen -= tmp + 1;
1753 /* terminate the mode strings */
1754 addbuf[addbuf_i] = '\0';
1755 rembuf[rembuf_i] = '\0';
1756 addbuf_local[addbuf_local_i] = '\0';
1757 rembuf_local[rembuf_local_i] = '\0';
1759 /* If we're building a user visible MODE or HACK... */
1760 if (mbuf->mb_dest & (MODEBUF_DEST_CHANNEL | MODEBUF_DEST_HACK2 |
1761 MODEBUF_DEST_HACK3 | MODEBUF_DEST_HACK4 |
1762 MODEBUF_DEST_LOG)) {
1763 /* Set up the parameter strings */
1769 for (i = 0; i < mbuf->mb_count; i++) {
1770 if (MB_TYPE(mbuf, i) & MODE_SAVE)
1773 if (MB_TYPE(mbuf, i) & MODE_ADD) { /* adding or removing? */
1775 strptr_i = &addstr_i;
1778 strptr_i = &remstr_i;
1781 /* deal with clients... */
1782 if (MB_TYPE(mbuf, i) & (MODE_CHANOP | MODE_VOICE))
1783 build_string(strptr, strptr_i, cli_name(MB_CLIENT(mbuf, i)), 0, ' ');
1785 /* deal with bans... */
1786 else if (MB_TYPE(mbuf, i) & (MODE_BAN))
1787 build_string(strptr, strptr_i, MB_STRING(mbuf, i), 0, ' ');
1789 /* deal with keys... */
1790 else if (MB_TYPE(mbuf, i) & MODE_KEY)
1791 build_string(strptr, strptr_i, mbuf->mb_dest & MODEBUF_DEST_NOKEY ?
1792 "*" : MB_STRING(mbuf, i), 0, ' ');
1794 /* deal with invisible passwords */
1795 else if (MB_TYPE(mbuf, i) & (MODE_APASS | MODE_UPASS))
1796 build_string(strptr, strptr_i, "*", 0, ' ');
1799 * deal with limit; note we cannot include the limit parameter if we're
1802 else if ((MB_TYPE(mbuf, i) & (MODE_ADD | MODE_LIMIT)) ==
1803 (MODE_ADD | MODE_LIMIT))
1804 build_string(strptr, strptr_i, limitbuf, 0, ' ');
1805 else if ((MB_TYPE(mbuf, i) & (MODE_ADD | MODE_ACCESS)) ==
1806 (MODE_ADD | MODE_ACCESS))
1807 build_string(strptr, strptr_i, accessbuf, 0, ' ');
1809 else if (MB_TYPE(mbuf, i) & MODE_ALTCHAN)
1810 build_string(strptr, strptr_i, MB_STRING(mbuf, i), 0, ' ');
1811 else if ((MB_TYPE(mbuf, i) & (MODE_ADD | MODE_NOFLOOD)) ==
1812 (MODE_ADD | MODE_NOFLOOD))
1813 build_string(strptr, strptr_i, MB_STRING(mbuf, i), 0, ' ');
1816 /* send the messages off to their destination */
1817 if (mbuf->mb_dest & MODEBUF_DEST_HACK2)
1818 sendto_opmask_butone(0, SNO_HACK2, "HACK(2): %s MODE %s %s%s%s%s%s%s "
1820 cli_name(feature_bool(FEAT_HIS_SNOTICES) ?
1821 mbuf->mb_source : app_source),
1822 mbuf->mb_channel->chname,
1823 rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
1824 addbuf, remstr, addstr,
1825 mbuf->mb_channel->creationtime);
1827 if (mbuf->mb_dest & MODEBUF_DEST_HACK3)
1828 sendto_opmask_butone(0, SNO_HACK3, "BOUNCE or HACK(3): %s MODE %s "
1829 "%s%s%s%s%s%s [%Tu]",
1830 cli_name(feature_bool(FEAT_HIS_SNOTICES) ?
1831 mbuf->mb_source : app_source),
1832 mbuf->mb_channel->chname, rembuf_i ? "-" : "",
1833 rembuf, addbuf_i ? "+" : "", addbuf, remstr, addstr,
1834 mbuf->mb_channel->creationtime);
1836 if (mbuf->mb_dest & MODEBUF_DEST_HACK4)
1837 sendto_opmask_butone(0, SNO_HACK4, "HACK(4): %s MODE %s %s%s%s%s%s%s "
1839 cli_name(feature_bool(FEAT_HIS_SNOTICES) ?
1840 mbuf->mb_source : app_source),
1841 mbuf->mb_channel->chname,
1842 rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
1843 addbuf, remstr, addstr,
1844 mbuf->mb_channel->creationtime);
1846 if (mbuf->mb_dest & MODEBUF_DEST_LOG)
1847 log_write(LS_OPERMODE, L_INFO, LOG_NOSNOTICE,
1848 "%#C OPMODE %H %s%s%s%s%s%s", mbuf->mb_source,
1849 mbuf->mb_channel, rembuf_i ? "-" : "", rembuf,
1850 addbuf_i ? "+" : "", addbuf, remstr, addstr);
1852 if (mbuf->mb_dest & MODEBUF_DEST_CHANNEL)
1853 sendcmdto_channel_butserv_butone(app_source, CMD_MODE, mbuf->mb_channel, NULL, 0,
1854 "%H %s%s%s%s%s%s%s%s", mbuf->mb_channel,
1855 rembuf_i || rembuf_local_i ? "-" : "",
1856 rembuf, rembuf_local,
1857 addbuf_i || addbuf_local_i ? "+" : "",
1858 addbuf, addbuf_local,
1862 /* Now are we supposed to propagate to other servers? */
1863 if (mbuf->mb_dest & MODEBUF_DEST_SERVER) {
1864 /* set up parameter string */
1871 * limit is supressed if we're removing it; we have to figure out which
1872 * direction is the direction for it to be removed, though...
1874 limitdel |= (mbuf->mb_dest & MODEBUF_DEST_BOUNCE) ? MODE_DEL : MODE_ADD;
1875 accessdel |= (mbuf->mb_dest & MODEBUF_DEST_BOUNCE) ? MODE_DEL : MODE_ADD;
1877 for (i = 0; i < mbuf->mb_count; i++) {
1878 if (MB_TYPE(mbuf, i) & MODE_SAVE)
1881 if (MB_TYPE(mbuf, i) & MODE_ADD) { /* adding or removing? */
1883 strptr_i = &addstr_i;
1886 strptr_i = &remstr_i;
1889 /* if we're changing oplevels and we know the oplevel, pass it on */
1890 if ((MB_TYPE(mbuf, i) & MODE_CHANOP)
1891 && MB_OPLEVEL(mbuf, i) < MAXOPLEVEL)
1892 *strptr_i += ircd_snprintf(0, strptr + *strptr_i, BUFSIZE - *strptr_i,
1894 NumNick(MB_CLIENT(mbuf, i)),
1895 MB_OPLEVEL(mbuf, i));
1897 /* deal with other modes that take clients */
1898 else if (MB_TYPE(mbuf, i) & (MODE_CHANOP | MODE_VOICE))
1899 build_string(strptr, strptr_i, NumNick(MB_CLIENT(mbuf, i)), ' ');
1901 /* deal with modes that take strings */
1902 else if (MB_TYPE(mbuf, i) & (MODE_KEY | MODE_BAN | MODE_APASS | MODE_UPASS | MODE_ALTCHAN | MODE_NOFLOOD))
1903 build_string(strptr, strptr_i, MB_STRING(mbuf, i), 0, ' ');
1906 * deal with the limit. Logic here is complicated; if HACK2 is set,
1907 * we're bouncing the mode, so sense is reversed, and we have to
1908 * include the original limit if it looks like it's being removed
1910 else if ((MB_TYPE(mbuf, i) & limitdel) == limitdel)
1911 build_string(strptr, strptr_i, limitbuf, 0, ' ');
1912 else if ((MB_TYPE(mbuf, i) & accessdel) == accessdel)
1913 build_string(strptr, strptr_i, accessbuf, 0, ' ');
1916 /* we were told to deop the source */
1917 if (mbuf->mb_dest & MODEBUF_DEST_DEOP) {
1918 addbuf[addbuf_i++] = 'o'; /* remember, sense is reversed */
1919 addbuf[addbuf_i] = '\0'; /* terminate the string... */
1920 build_string(addstr, &addstr_i, NumNick(mbuf->mb_source), ' ');
1922 /* mark that we've done this, so we don't do it again */
1923 mbuf->mb_dest &= ~MODEBUF_DEST_DEOP;
1926 if (mbuf->mb_dest & MODEBUF_DEST_OPMODE) {
1927 /* If OPMODE was set, we're propagating the mode as an OPMODE message */
1928 sendcmdto_serv_butone(mbuf->mb_source, CMD_OPMODE, mbuf->mb_connect,
1929 "%H %s%s%s%s%s%s", mbuf->mb_channel,
1930 rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
1931 addbuf, remstr, addstr);
1932 } else if (mbuf->mb_dest & MODEBUF_DEST_BOUNCE) {
1934 * If HACK2 was set, we're bouncing; we send the MODE back to
1935 * the connection we got it from with the senses reversed and
1936 * the proper TS; origin is us
1938 sendcmdto_one(&me, CMD_MODE, mbuf->mb_connect, "%H %s%s%s%s%s%s %Tu",
1939 mbuf->mb_channel, addbuf_i ? "-" : "", addbuf,
1940 rembuf_i ? "+" : "", rembuf, addstr, remstr,
1941 mbuf->mb_channel->creationtime);
1944 * We're propagating a normal (or HACK3 or HACK4) MODE command
1945 * to the rest of the network. We send the actual channel TS.
1947 sendcmdto_serv_butone(mbuf->mb_source, CMD_MODE, mbuf->mb_connect,
1948 "%H %s%s%s%s%s%s %Tu", mbuf->mb_channel,
1949 rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
1950 addbuf, remstr, addstr,
1951 mbuf->mb_channel->creationtime);
1955 /* We've drained the ModeBuf... */
1960 /* reinitialize the mode-with-arg slots */
1961 for (i = 0; i < MAXMODEPARAMS; i++) {
1962 /* If we saved any, pack them down */
1963 if (MB_TYPE(mbuf, i) & MODE_SAVE) {
1964 mbuf->mb_modeargs[mbuf->mb_count] = mbuf->mb_modeargs[i];
1965 MB_TYPE(mbuf, mbuf->mb_count) &= ~MODE_SAVE; /* don't save anymore */
1967 if (mbuf->mb_count++ == i) /* don't overwrite our hard work */
1969 } else if (MB_TYPE(mbuf, i) & MODE_FREE)
1970 MyFree(MB_STRING(mbuf, i)); /* free string if needed */
1972 MB_TYPE(mbuf, i) = 0;
1973 MB_UINT(mbuf, i) = 0;
1976 /* If we're supposed to flush it all, do so--all hail tail recursion */
1977 if (all && mbuf->mb_count)
1978 return modebuf_flush_int(mbuf, 1);
1983 /** Initialise a modebuf
1984 * This routine just initializes a ModeBuf structure with the information
1985 * needed and the options given.
1987 * @param mbuf The mode buffer to initialise.
1988 * @param source The client that is performing the mode.
1990 * @param chan The channel that the mode is being performed upon.
1994 modebuf_init(struct ModeBuf *mbuf, struct Client *source,
1995 struct Client *connect, struct Channel *chan, unsigned int dest)
2000 assert(0 != source);
2004 if (IsLocalChannel(chan->chname)) dest &= ~MODEBUF_DEST_SERVER;
2008 mbuf->mb_source = source;
2009 mbuf->mb_connect = connect;
2010 mbuf->mb_channel = chan;
2011 mbuf->mb_dest = dest;
2014 /* clear each mode-with-parameter slot */
2015 for (i = 0; i < MAXMODEPARAMS; i++) {
2016 MB_TYPE(mbuf, i) = 0;
2017 MB_UINT(mbuf, i) = 0;
2021 /** Append a new mode to a modebuf
2022 * This routine simply adds modes to be added or deleted; do a binary OR
2023 * with either MODE_ADD or MODE_DEL
2025 * @param mbuf Mode buffer
2026 * @param mode MODE_ADD or MODE_DEL OR'd with MODE_PRIVATE etc.
2029 modebuf_mode(struct ModeBuf *mbuf, ulong64 mode)
2032 assert(0 != (mode & (MODE_ADD | MODE_DEL)));
2034 mode &= (MODE_ADD | MODE_DEL | MODE_PRIVATE | MODE_SECRET | MODE_MODERATED |
2035 MODE_TOPICLIMIT | MODE_INVITEONLY | MODE_NOPRIVMSGS | MODE_REGONLY |
2036 MODE_DELJOINS | MODE_WASDELJOINS | MODE_REGISTERED | MODE_PERSIST |
2037 MODE_NOCOLOUR | MODE_NOCTCP | MODE_NOAMSGS | MODE_NONOTICE |
2038 MODE_QUARANTINE | MODE_AUDITORIUM);
2040 if (!(mode & ~(MODE_ADD | MODE_DEL))) /* don't add empty modes... */
2043 if (mode & MODE_ADD) {
2044 mbuf->mb_rem &= ~mode;
2045 mbuf->mb_add |= mode;
2047 mbuf->mb_add &= ~mode;
2048 mbuf->mb_rem |= mode;
2052 /** Append a mode that takes an ulong64 argument to the modebuf
2054 * This routine adds a mode to be added or deleted that takes a unsigned
2055 * ulong64 parameter; mode may *only* be the relevant mode flag ORed with one
2056 * of MODE_ADD or MODE_DEL
2058 * @param mbuf The mode buffer to append to.
2059 * @param mode The mode to append.
2060 * @param uint The argument to the mode.
2063 modebuf_mode_uint(struct ModeBuf *mbuf, ulong64 mode, unsigned int uint)
2066 assert(0 != (mode & (MODE_ADD | MODE_DEL)));
2068 if (mode == (MODE_LIMIT | MODE_DEL)) {
2069 mbuf->mb_rem |= mode;
2072 if (mode == (MODE_ACCESS | MODE_DEL)) {
2073 mbuf->mb_rem |= mode;
2076 MB_TYPE(mbuf, mbuf->mb_count) = mode;
2077 MB_UINT(mbuf, mbuf->mb_count) = uint;
2079 /* when we've reached the maximal count, flush the buffer */
2080 if (++mbuf->mb_count >=
2081 (MAXMODEPARAMS - (mbuf->mb_dest & MODEBUF_DEST_DEOP ? 1 : 0)))
2082 modebuf_flush_int(mbuf, 0);
2085 /** append a string mode
2086 * This routine adds a mode to be added or deleted that takes a string
2087 * parameter; mode may *only* be the relevant mode flag ORed with one of
2088 * MODE_ADD or MODE_DEL
2090 * @param mbuf The mode buffer to append to.
2091 * @param mode The mode to append.
2092 * @param string The string parameter to append.
2093 * @param free If the string should be free'd later.
2096 modebuf_mode_string(struct ModeBuf *mbuf, ulong64 mode, char *string,
2100 assert(0 != (mode & (MODE_ADD | MODE_DEL)));
2102 MB_TYPE(mbuf, mbuf->mb_count) = mode | (free ? MODE_FREE : 0);
2103 MB_STRING(mbuf, mbuf->mb_count) = string;
2105 /* when we've reached the maximal count, flush the buffer */
2106 if (++mbuf->mb_count >=
2107 (MAXMODEPARAMS - (mbuf->mb_dest & MODEBUF_DEST_DEOP ? 1 : 0)))
2108 modebuf_flush_int(mbuf, 0);
2111 /** Append a mode on a client to a modebuf.
2112 * This routine adds a mode to be added or deleted that takes a client
2113 * parameter; mode may *only* be the relevant mode flag ORed with one of
2114 * MODE_ADD or MODE_DEL
2116 * @param mbuf The modebuf to append the mode to.
2117 * @param mode The mode to append.
2118 * @param client The client argument to append.
2119 * @param oplevel The oplevel the user had or will have
2122 modebuf_mode_client(struct ModeBuf *mbuf, ulong64 mode,
2123 struct Client *client, int oplevel)
2126 assert(0 != (mode & (MODE_ADD | MODE_DEL)));
2128 MB_TYPE(mbuf, mbuf->mb_count) = mode;
2129 MB_CLIENT(mbuf, mbuf->mb_count) = client;
2130 MB_OPLEVEL(mbuf, mbuf->mb_count) = oplevel;
2132 /* when we've reached the maximal count, flush the buffer */
2133 if (++mbuf->mb_count >=
2134 (MAXMODEPARAMS - (mbuf->mb_dest & MODEBUF_DEST_DEOP ? 1 : 0)))
2135 modebuf_flush_int(mbuf, 0);
2138 /** Check a channel for join-delayed members.
2139 * @param[in] chan Channel to search.
2140 * @return Non-zero if any members are join-delayed; false if none are.
2143 find_delayed_joins(const struct Channel *chan)
2145 const struct Membership *memb;
2146 for (memb = chan->members; memb; memb = memb->next_member)
2147 if (IsDelayedJoin(memb) && !IsInvisibleJoin(memb))
2152 /** The exported binding for modebuf_flush()
2154 * @param mbuf The mode buffer to flush.
2156 * @see modebuf_flush_int()
2159 modebuf_flush(struct ModeBuf *mbuf)
2161 /* Check if MODE_WASDELJOINS should be set: */
2162 /* Must be set if going -D and some clients are hidden */
2163 if ((mbuf->mb_rem & MODE_DELJOINS)
2164 && !(mbuf->mb_channel->mode.mode & (MODE_DELJOINS | MODE_WASDELJOINS))
2165 && find_delayed_joins(mbuf->mb_channel)) {
2166 mbuf->mb_channel->mode.mode |= MODE_WASDELJOINS;
2167 mbuf->mb_add |= MODE_WASDELJOINS;
2168 mbuf->mb_rem &= ~MODE_WASDELJOINS;
2170 /* Must be cleared if +D is set */
2171 if ((mbuf->mb_add & MODE_DELJOINS)
2172 && ((mbuf->mb_channel->mode.mode & (MODE_WASDELJOINS | MODE_WASDELJOINS))
2173 == (MODE_WASDELJOINS | MODE_WASDELJOINS))) {
2174 mbuf->mb_channel->mode.mode &= ~MODE_WASDELJOINS;
2175 mbuf->mb_add &= ~MODE_WASDELJOINS;
2176 mbuf->mb_rem |= MODE_WASDELJOINS;
2179 return modebuf_flush_int(mbuf, 1);
2182 /* This extracts the simple modes contained in mbuf
2184 * @param mbuf The mode buffer to extract the modes from.
2185 * @param buf The string buffer to write the modes into.
2188 modebuf_extract(struct ModeBuf *mbuf, char *buf)
2190 static ulong64 flags[] = {
2191 /* MODE_CHANOP, 'o', */
2192 /* MODE_VOICE, 'v', */
2195 MODE_MODERATED, 'm',
2196 MODE_TOPICLIMIT, 't',
2197 MODE_INVITEONLY, 'i',
2198 MODE_NOPRIVMSGS, 'n',
2202 MODE_REGISTERED, 'R',
2203 /* MODE_BAN, 'b', */
2212 MODE_QUARANTINE, 'Q',
2215 MODE_AUDITORIUM, 'u',
2220 int i, bufpos = 0, len;
2222 char *key = 0, limitbuf[20], accessbuf[20];
2223 char *apass = 0, *upass = 0, *altchan = 0, *noflood = 0;
2232 for (i = 0; i < mbuf->mb_count; i++) { /* find keys and limits */
2233 if (MB_TYPE(mbuf, i) & MODE_ADD) {
2234 add |= MB_TYPE(mbuf, i) & (MODE_KEY | MODE_LIMIT | MODE_APASS | MODE_UPASS | MODE_ALTCHAN | MODE_ACCESS | MODE_NOFLOOD);
2236 if (MB_TYPE(mbuf, i) & MODE_KEY) /* keep strings */
2237 key = MB_STRING(mbuf, i);
2238 else if (MB_TYPE(mbuf, i) & MODE_LIMIT)
2239 ircd_snprintf(0, limitbuf, sizeof(limitbuf), "%u", MB_UINT(mbuf, i));
2240 else if (MB_TYPE(mbuf, i) & MODE_ACCESS)
2241 ircd_snprintf(0, accessbuf, sizeof(accessbuf), "%u", MB_UINT(mbuf, i));
2242 else if (MB_TYPE(mbuf, i) & MODE_UPASS)
2243 upass = MB_STRING(mbuf, i);
2244 else if (MB_TYPE(mbuf, i) & MODE_APASS)
2245 apass = MB_STRING(mbuf, i);
2246 else if (MB_TYPE(mbuf, i) & MODE_ALTCHAN)
2247 altchan = MB_STRING(mbuf, i);
2248 else if (MB_TYPE(mbuf, i) & MODE_NOFLOOD)
2249 noflood = MB_STRING(mbuf, i);
2256 buf[bufpos++] = '+'; /* start building buffer */
2258 for (flag_p = flags; flag_p[0]; flag_p += 2)
2260 buf[bufpos++] = flag_p[1];
2262 for (i = 0, len = bufpos; i < len; i++) {
2264 build_string(buf, &bufpos, key, 0, ' ');
2265 else if (buf[i] == 'l')
2266 build_string(buf, &bufpos, limitbuf, 0, ' ');
2267 else if (buf[i] == 'a')
2268 build_string(buf, &bufpos, accessbuf, 0, ' ');
2269 else if (buf[i] == 'U')
2270 build_string(buf, &bufpos, upass, 0, ' ');
2271 else if (buf[i] == 'A')
2272 build_string(buf, &bufpos, apass, 0, ' ');
2273 else if (buf[i] == 'F')
2274 build_string(buf, &bufpos, altchan, 0, ' ');
2275 else if (buf[i] == 'f')
2276 build_string(buf, &bufpos, noflood, 0, ' ');
2284 /** Simple function to invalidate a channel's ban cache.
2286 * This function marks all members of the channel as being neither
2287 * banned nor banned.
2289 * @param chan The channel to operate on.
2292 mode_ban_invalidate(struct Channel *chan)
2294 struct Membership *member;
2296 for (member = chan->members; member; member = member->next_member)
2297 ClearBanValid(member);
2300 /** Simple function to drop invite structures
2302 * Remove all the invites on the channel.
2304 * @param chan Channel to remove invites from.
2308 mode_invite_clear(struct Channel *chan)
2310 while (chan->invites)
2311 del_invite(chan->invites->value.cptr, chan);
2314 /* What we've done for mode_parse so far... */
2315 #define DONE_LIMIT 0x01 /**< We've set the limit */
2316 #define DONE_KEY_ADD 0x02 /**< We've set the key */
2317 #define DONE_BANLIST 0x04 /**< We've sent the ban list */
2318 #define DONE_NOTOPER 0x08 /**< We've sent a "Not oper" error */
2319 #define DONE_BANCLEAN 0x10 /**< We've cleaned bans... */
2320 #define DONE_UPASS_ADD 0x20 /**< We've set user pass */
2321 #define DONE_APASS_ADD 0x40 /**< We've set admin pass */
2322 #define DONE_KEY_DEL 0x80 /**< We've removed the key */
2323 #define DONE_UPASS_DEL 0x100 /**< We've removed the user pass */
2324 #define DONE_APASS_DEL 0x200 /**< We've removed the admin pass */
2325 #define DONE_ALTCHAN 0x800 /**< We've set the altchan */
2326 #define DONE_ACCESS 0x1000 /**< We've set the access */
2327 #define DONE_NOFLOOD 0x2000 /**< We've set the noflood options */
2330 struct ModeBuf *mbuf;
2331 struct Client *cptr;
2332 struct Client *sptr;
2333 struct Channel *chptr;
2334 struct Membership *member;
2345 struct Ban banlist[MAXPARA];
2348 unsigned short oplevel;
2349 struct Client *client;
2350 } cli_change[MAXPARA];
2353 /** Helper function to send "Not oper" or "Not member" messages
2354 * Here's a helper function to deal with sending along "Not oper" or
2355 * "Not member" messages
2357 * @param state Parsing State object
2360 send_notoper(struct ParseState *state)
2362 if (state->done & DONE_NOTOPER)
2365 send_reply(state->sptr, (state->flags & MODE_PARSE_NOTOPER) ?
2366 ERR_CHANOPRIVSNEEDED : ERR_NOTONCHANNEL, state->chptr->chname);
2368 state->done |= DONE_NOTOPER;
2372 * Helper function to convert limits
2374 * @param state Parsing state object.
2378 mode_parse_limit(struct ParseState *state, ulong64 *flag_p)
2380 unsigned int t_limit;
2382 if (state->dir == MODE_ADD) { /* convert arg only if adding limit */
2383 if (MyUser(state->sptr) && state->max_args <= 0) /* too many args? */
2386 if (state->parc <= 0) { /* warn if not enough args */
2387 if (MyUser(state->sptr))
2388 need_more_params(state->sptr, "MODE +l");
2392 t_limit = strtoul(state->parv[state->args_used++], 0, 10); /* grab arg */
2396 if ((int)t_limit<0) /* don't permit a negative limit */
2399 if (!(state->flags & MODE_PARSE_WIPEOUT) &&
2400 (!t_limit || t_limit == state->chptr->mode.limit))
2403 t_limit = state->chptr->mode.limit;
2405 /* If they're not an oper, they can't change modes */
2406 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2407 send_notoper(state);
2411 /* Can't remove a limit that's not there */
2412 if (state->dir == MODE_DEL && !state->chptr->mode.limit)
2415 /* Skip if this is a burst and a lower limit than this is set already */
2416 if ((state->flags & MODE_PARSE_BURST) &&
2417 (state->chptr->mode.mode & flag_p[0]) &&
2418 (state->chptr->mode.limit < t_limit))
2421 if (state->done & DONE_LIMIT) /* allow limit to be set only once */
2423 state->done |= DONE_LIMIT;
2428 modebuf_mode_uint(state->mbuf, state->dir | flag_p[0], t_limit);
2430 if (state->flags & MODE_PARSE_SET) { /* set the limit */
2431 if (state->dir & MODE_ADD) {
2432 state->chptr->mode.mode |= flag_p[0];
2433 state->chptr->mode.limit = t_limit;
2435 state->chptr->mode.mode &= ~flag_p[0];
2436 state->chptr->mode.limit = 0;
2443 mode_parse_access(struct ParseState *state, ulong64 *flag_p)
2445 unsigned int t_access;
2447 if (state->dir == MODE_ADD) { /* convert arg only if adding access */
2448 if (MyUser(state->sptr) && state->max_args <= 0) /* too many args? */
2451 if (state->parc <= 0) { /* warn if not enough args */
2452 if (MyUser(state->sptr))
2453 need_more_params(state->sptr, "MODE +a");
2457 t_access = strtoul(state->parv[state->args_used++], 0, 10); /* grab arg */
2461 if ((int)t_access<1 || (int)t_access>500) /* don't permit a negative access or an access over 500 */
2464 if (!feature_bool(FEAT_CHMODE_A_ENABLE)) { /* don't parse MODE_ACCESS if it's disabled */
2465 if (MyUser(state->sptr)) {
2467 send_reply(state->sptr, ERR_UNKNOWNMODE, mode[0]);
2472 if (!(state->flags & MODE_PARSE_WIPEOUT) &&
2473 (!t_access || t_access == state->chptr->mode.access))
2476 t_access = state->chptr->mode.access;
2478 /* If they're not an oper, they can't change modes */
2479 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2480 send_notoper(state);
2484 /* Can't remove an access that's not there */
2485 if (state->dir == MODE_DEL && !state->chptr->mode.access)
2488 /* Skip if this is a burst and a higher access than this is set already */
2489 if ((state->flags & MODE_PARSE_BURST) &&
2490 (state->chptr->mode.mode & flag_p[0]) &&
2491 (state->chptr->mode.access > t_access))
2494 if (state->done & DONE_ACCESS) /* allow access to be set only once */
2496 state->done |= DONE_ACCESS;
2501 modebuf_mode_uint(state->mbuf, state->dir | flag_p[0], t_access);
2503 if (state->flags & MODE_PARSE_SET) { /* set the access */
2504 if (state->dir & MODE_ADD) {
2505 state->chptr->mode.mode |= flag_p[0];
2506 state->chptr->mode.access = t_access;
2508 state->chptr->mode.mode &= ~flag_p[0];
2509 state->chptr->mode.access = 0;
2516 mode_parse_altchan(struct ParseState *state, ulong64 *flag_p)
2520 if (state->dir == MODE_ADD) { /* convert arg only if adding altchan */
2521 if (MyUser(state->sptr) && state->max_args <= 0) /* too many args? */
2524 if (!feature_bool(FEAT_CHMODE_F_ENABLE))
2527 if (state->parc <= 0) { /* warn if not enough args */
2528 if (MyUser(state->sptr))
2529 need_more_params(state->sptr, "MODE +F");
2533 t_str = state->parv[state->args_used++]; /* grab arg */
2537 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! */
2540 struct Channel *chptr;
2541 struct Membership *member;
2542 if (!(chptr = FindChannel(t_str)))
2544 if(!(member = find_member_link(chptr, state->sptr)))
2546 if(!IsChanOp(member)) {
2547 send_notoper(state);
2551 if (!(state->flags & MODE_PARSE_WIPEOUT) &&
2552 (!t_str || t_str == state->chptr->mode.altchan))
2555 t_str = state->chptr->mode.altchan;
2557 /* If they're not an oper, they can't change modes */
2558 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2559 send_notoper(state);
2563 /* Can't remove a altchan that's not there */
2564 if (state->dir == MODE_DEL && !*state->chptr->mode.altchan)
2567 /* Skip if this is a burst and a lower altchan than this is set already */
2568 if ((state->flags & MODE_PARSE_BURST) &&
2569 *(state->chptr->mode.altchan))
2572 if (state->done & DONE_ALTCHAN) /* allow altchan to be set only once */
2574 state->done |= DONE_ALTCHAN;
2579 if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
2580 !ircd_strcmp(state->chptr->mode.altchan, t_str))
2581 return; /* no change */
2583 if (state->flags & MODE_PARSE_BOUNCE) {
2584 if (*state->chptr->mode.altchan) /* reset old altchan */
2585 modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0], state->chptr->mode.altchan, 0);
2586 else /* remove new bogus altchan */
2587 modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
2588 } else /* send new altchan */
2589 modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
2591 if (state->flags & MODE_PARSE_SET) {
2592 if (state->dir == MODE_DEL) { /* remove the old altchan */
2593 *state->chptr->mode.altchan = '\0';
2594 state->chptr->mode.mode &= ~flag_p[0];
2596 ircd_strncpy(state->chptr->mode.altchan, t_str, CHANNELLEN);
2597 state->chptr->mode.mode |= flag_p[0];
2603 mode_parse_noflood(struct ParseState *state, ulong64 *flag_p)
2607 unsigned int count = 0, time = 0, flags = 0;
2609 if (state->dir == MODE_ADD) { /* convert arg only if adding noflood */
2610 if (MyUser(state->sptr) && state->max_args <= 0) /* too many args? */
2613 if (state->parc <= 0) { /* warn if not enough args */
2614 if (MyUser(state->sptr))
2615 need_more_params(state->sptr, "MODE +f");
2619 t_str = state->parv[state->args_used++]; /* grab arg */
2626 if(state->flags & MODE_PARSE_FORCE) flags |= FLFL_NOFLOOD;
2627 else t_str++; //simply ignore if it's not an opmode
2630 if(tmp[0] == '+' || tmp[0] == '@') {
2631 if(tmp[0] == '+') flags |= FLFL_VOICE;
2632 if(tmp[0] == '@') flags |= FLFL_CHANOP;
2636 for(p = tmp; p[0]; p++) {
2638 char tmpchar = p[0];
2640 count = strtoul(tmp,0,10);
2643 time = strtoul(p,0,10);
2647 if(count <= 0 || time <= 0 || count > 100 || time > 600) return;
2649 if (!(state->flags & MODE_PARSE_WIPEOUT) &&
2650 (!t_str || t_str == state->chptr->mode.noflood))
2653 t_str = state->chptr->mode.noflood;
2655 /* If they're not an oper, they can't change modes */
2656 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2657 send_notoper(state);
2661 /* Can't remove a noflood that's not there */
2662 if (state->dir == MODE_DEL && !*state->chptr->mode.noflood)
2665 /* Skip if this is a burst and a lower noflood than this is set already */
2666 if ((state->flags & MODE_PARSE_BURST) &&
2667 *(state->chptr->mode.noflood))
2670 if (state->done & DONE_NOFLOOD) /* allow noflood to be set only once */
2672 state->done |= DONE_NOFLOOD;
2677 if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
2678 !ircd_strcmp(state->chptr->mode.noflood, t_str))
2679 return; /* no change */
2681 if (state->flags & MODE_PARSE_BOUNCE) {
2682 if (*state->chptr->mode.noflood) /* reset old noflood */
2683 modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0], state->chptr->mode.noflood, 0);
2684 else /* remove new bogus noflood */
2685 modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
2686 } else /* send new noflood */
2687 modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
2689 if (state->flags & MODE_PARSE_SET) {
2690 if (state->dir == MODE_DEL) { /* remove the old noflood */
2691 *state->chptr->mode.noflood = '\0';
2692 state->chptr->mode.mode &= ~flag_p[0];
2694 ircd_strncpy(state->chptr->mode.noflood, t_str, CHANNELLEN);
2695 state->chptr->mode.mode |= flag_p[0];
2699 if (state->dir == MODE_ADD) {
2700 unsigned int noflood_value = time;
2701 noflood_value <<= 10;
2702 noflood_value |= count;
2703 noflood_value <<= 3;
2704 noflood_value |= flags;
2705 state->chptr->mode.noflood_value = noflood_value;
2707 //removed the mode so free all flood objects
2708 state->chptr->mode.noflood_value = 0;
2709 struct Membership *member;
2710 for(member = state->chptr->members; member; member = member->next_member) {
2711 struct MemberFlood *floodnode;
2712 for(floodnode = member->flood;floodnode ; floodnode = floodnode->next_memberflood) {
2713 if(floodnode->next_memberflood == NULL) break;
2714 } //simply walk to the end
2715 if(!floodnode) continue;
2716 floodnode->next_memberflood = free_MemberFlood;
2717 free_MemberFlood = floodnode;
2718 member->flood = NULL;
2724 mode_parse_quarantine(struct ParseState *state, ulong64 *flag_p)
2729 /** Helper function to validate key-like parameters.
2731 * @param[in] state Parse state for feedback to user.
2732 * @param[in] s Key to validate.
2733 * @param[in] command String to pass for need_more_params() command.
2734 * @return Zero on an invalid key, non-zero if the key was okay.
2737 is_clean_key(struct ParseState *state, char *s, char *command)
2742 if (MyUser(state->sptr))
2743 need_more_params(state->sptr, command);
2746 else if (s[0] == ':') {
2747 if (MyUser(state->sptr))
2748 send_reply(state->sptr, ERR_INVALIDKEY, state->chptr->chname);
2751 for (ii = 0; (ii <= KEYLEN) && (s[ii] != '\0'); ++ii) {
2752 if ((unsigned char)s[ii] <= ' ' || s[ii] == ',') {
2753 if (MyUser(state->sptr))
2754 send_reply(state->sptr, ERR_INVALIDKEY, state->chptr->chname);
2759 if (MyUser(state->sptr))
2760 send_reply(state->sptr, ERR_INVALIDKEY, state->chptr->chname);
2767 * Helper function to convert keys
2770 mode_parse_key(struct ParseState *state, ulong64 *flag_p)
2774 if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
2777 if (state->parc <= 0) { /* warn if not enough args */
2778 if (MyUser(state->sptr))
2779 need_more_params(state->sptr, state->dir == MODE_ADD ? "MODE +k" :
2784 t_str = state->parv[state->args_used++]; /* grab arg */
2788 /* If they're not an oper, they can't change modes */
2789 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2790 send_notoper(state);
2794 /* allow removing and then adding key, but not adding and then removing */
2795 if (state->dir == MODE_ADD)
2797 if (state->done & DONE_KEY_ADD)
2799 state->done |= DONE_KEY_ADD;
2803 if (state->done & (DONE_KEY_ADD | DONE_KEY_DEL))
2805 state->done |= DONE_KEY_DEL;
2808 /* If the key is invalid, tell the user and bail. */
2809 if (!is_clean_key(state, t_str, state->dir == MODE_ADD ? "MODE +k" :
2816 /* Skip if this is a burst, we have a key already and the new key is
2817 * after the old one alphabetically */
2818 if ((state->flags & MODE_PARSE_BURST) &&
2819 *(state->chptr->mode.key) &&
2820 ircd_strcmp(state->chptr->mode.key, t_str) <= 0)
2823 /* can't add a key if one is set, nor can one remove the wrong key */
2824 if (!(state->flags & MODE_PARSE_FORCE))
2825 if ((state->dir == MODE_ADD && *state->chptr->mode.key) ||
2826 (state->dir == MODE_DEL &&
2827 ircd_strcmp(state->chptr->mode.key, t_str))) {
2828 send_reply(state->sptr, ERR_KEYSET, state->chptr->chname);
2832 if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
2833 !ircd_strcmp(state->chptr->mode.key, t_str))
2834 return; /* no key change */
2836 if (state->flags & MODE_PARSE_BOUNCE) {
2837 if (*state->chptr->mode.key) /* reset old key */
2838 modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0],
2839 state->chptr->mode.key, 0);
2840 else /* remove new bogus key */
2841 modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
2842 } else /* send new key */
2843 modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
2845 if (state->flags & MODE_PARSE_SET) {
2846 if (state->dir == MODE_DEL) /* remove the old key */
2847 *state->chptr->mode.key = '\0';
2849 ircd_strncpy(state->chptr->mode.key, t_str, KEYLEN);
2854 * Helper function to convert user passes
2857 mode_parse_upass(struct ParseState *state, ulong64 *flag_p)
2861 if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
2864 if (state->parc <= 0) { /* warn if not enough args */
2865 if (MyUser(state->sptr))
2866 need_more_params(state->sptr, state->dir == MODE_ADD ? "MODE +U" :
2871 t_str = state->parv[state->args_used++]; /* grab arg */
2875 /* If they're not an oper, they can't change modes */
2876 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2877 send_notoper(state);
2881 /* If a non-service user is trying to force it, refuse. */
2882 if (state->flags & MODE_PARSE_FORCE && MyUser(state->sptr)
2883 && !HasPriv(state->sptr, PRIV_APASS_OPMODE)) {
2884 send_reply(state->sptr, ERR_NOTMANAGER, state->chptr->chname,
2885 state->chptr->chname);
2889 /* If they are not the channel manager, they are not allowed to change it */
2890 if (MyUser(state->sptr) && !(state->flags & MODE_PARSE_FORCE || IsChannelManager(state->member))) {
2891 if (*state->chptr->mode.apass) {
2892 send_reply(state->sptr, ERR_NOTMANAGER, state->chptr->chname,
2893 state->chptr->chname);
2895 send_reply(state->sptr, ERR_NOMANAGER, state->chptr->chname,
2896 (TStime() - state->chptr->creationtime < 172800) ?
2897 "approximately 4-5 minutes" : "approximately 48 hours");
2902 /* allow removing and then adding upass, but not adding and then removing */
2903 if (state->dir == MODE_ADD)
2905 if (state->done & DONE_UPASS_ADD)
2907 state->done |= DONE_UPASS_ADD;
2911 if (state->done & (DONE_UPASS_ADD | DONE_UPASS_DEL))
2913 state->done |= DONE_UPASS_DEL;
2916 /* If the Upass is invalid, tell the user and bail. */
2917 if (!is_clean_key(state, t_str, state->dir == MODE_ADD ? "MODE +U" :
2924 if (!(state->flags & MODE_PARSE_FORCE)) {
2925 /* can't add the upass while apass is not set */
2926 if (state->dir == MODE_ADD && !*state->chptr->mode.apass) {
2927 send_reply(state->sptr, ERR_UPASSNOTSET, state->chptr->chname, state->chptr->chname);
2930 /* cannot set a +U password that is the same as +A */
2931 if (state->dir == MODE_ADD && !ircd_strcmp(state->chptr->mode.apass, t_str)) {
2932 send_reply(state->sptr, ERR_UPASS_SAME_APASS, state->chptr->chname);
2935 /* can't add a upass if one is set, nor can one remove the wrong upass */
2936 if ((state->dir == MODE_ADD && *state->chptr->mode.upass) ||
2937 (state->dir == MODE_DEL &&
2938 ircd_strcmp(state->chptr->mode.upass, t_str))) {
2939 send_reply(state->sptr, ERR_KEYSET, state->chptr->chname);
2944 if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
2945 !ircd_strcmp(state->chptr->mode.upass, t_str))
2946 return; /* no upass change */
2948 /* Skip if this is a burst, we have a Upass already and the new Upass is
2949 * after the old one alphabetically */
2950 if ((state->flags & MODE_PARSE_BURST) &&
2951 *(state->chptr->mode.upass) &&
2952 ircd_strcmp(state->chptr->mode.upass, t_str) <= 0)
2955 if (state->flags & MODE_PARSE_BOUNCE) {
2956 if (*state->chptr->mode.upass) /* reset old upass */
2957 modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0],
2958 state->chptr->mode.upass, 0);
2959 else /* remove new bogus upass */
2960 modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
2961 } else /* send new upass */
2962 modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
2964 if (state->flags & MODE_PARSE_SET) {
2965 if (state->dir == MODE_DEL) /* remove the old upass */
2966 *state->chptr->mode.upass = '\0';
2968 ircd_strncpy(state->chptr->mode.upass, t_str, KEYLEN);
2973 * Helper function to convert admin passes
2976 mode_parse_apass(struct ParseState *state, ulong64 *flag_p)
2978 struct Membership *memb;
2981 if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
2984 if (state->parc <= 0) { /* warn if not enough args */
2985 if (MyUser(state->sptr))
2986 need_more_params(state->sptr, state->dir == MODE_ADD ? "MODE +A" :
2991 t_str = state->parv[state->args_used++]; /* grab arg */
2995 /* If they're not an oper, they can't change modes */
2996 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2997 send_notoper(state);
3001 if (MyUser(state->sptr)) {
3002 if (state->flags & MODE_PARSE_FORCE) {
3003 /* If an unprivileged oper is trying to force it, refuse. */
3004 if (!HasPriv(state->sptr, PRIV_APASS_OPMODE)) {
3005 send_reply(state->sptr, ERR_NOTMANAGER, state->chptr->chname,
3006 state->chptr->chname);
3010 /* If they are not the channel manager, they are not allowed to change it. */
3011 if (!IsChannelManager(state->member)) {
3012 if (*state->chptr->mode.apass) {
3013 send_reply(state->sptr, ERR_NOTMANAGER, state->chptr->chname,
3014 state->chptr->chname);
3016 send_reply(state->sptr, ERR_NOMANAGER, state->chptr->chname,
3017 (TStime() - state->chptr->creationtime < 172800) ?
3018 "approximately 4-5 minutes" : "approximately 48 hours");
3022 /* Can't remove the Apass while Upass is still set. */
3023 if (state->dir == MODE_DEL && *state->chptr->mode.upass) {
3024 send_reply(state->sptr, ERR_UPASSSET, state->chptr->chname, state->chptr->chname);
3027 /* Can't add an Apass if one is set, nor can one remove the wrong Apass. */
3028 if ((state->dir == MODE_ADD && *state->chptr->mode.apass) ||
3029 (state->dir == MODE_DEL && ircd_strcmp(state->chptr->mode.apass, t_str))) {
3030 send_reply(state->sptr, ERR_KEYSET, state->chptr->chname);
3035 /* Forbid removing the Apass if the channel is older than 48 hours
3036 * unless an oper is doing it. */
3037 if (TStime() - state->chptr->creationtime >= 172800
3038 && state->dir == MODE_DEL
3039 && !IsAnOper(state->sptr)) {
3040 send_reply(state->sptr, ERR_CHANSECURED, state->chptr->chname);
3045 /* allow removing and then adding apass, but not adding and then removing */
3046 if (state->dir == MODE_ADD)
3048 if (state->done & DONE_APASS_ADD)
3050 state->done |= DONE_APASS_ADD;
3054 if (state->done & (DONE_APASS_ADD | DONE_APASS_DEL))
3056 state->done |= DONE_APASS_DEL;
3059 /* If the Apass is invalid, tell the user and bail. */
3060 if (!is_clean_key(state, t_str, state->dir == MODE_ADD ? "MODE +A" :
3067 if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
3068 !ircd_strcmp(state->chptr->mode.apass, t_str))
3069 return; /* no apass change */
3071 /* Skip if this is a burst, we have an Apass already and the new Apass is
3072 * after the old one alphabetically */
3073 if ((state->flags & MODE_PARSE_BURST) &&
3074 *(state->chptr->mode.apass) &&
3075 ircd_strcmp(state->chptr->mode.apass, t_str) <= 0)
3078 if (state->flags & MODE_PARSE_BOUNCE) {
3079 if (*state->chptr->mode.apass) /* reset old apass */
3080 modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0],
3081 state->chptr->mode.apass, 0);
3082 else /* remove new bogus apass */
3083 modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
3084 } else /* send new apass */
3085 modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
3087 if (state->flags & MODE_PARSE_SET) {
3088 if (state->dir == MODE_ADD) { /* set the new apass */
3089 /* Only accept the new apass if there is no current apass or
3090 * this is a BURST. */
3091 if (state->chptr->mode.apass[0] == '\0' ||
3092 (state->flags & MODE_PARSE_BURST))
3093 ircd_strncpy(state->chptr->mode.apass, t_str, KEYLEN);
3094 /* Make it VERY clear to the user that this is a one-time password */
3095 if (MyUser(state->sptr)) {
3096 send_reply(state->sptr, RPL_APASSWARN_SET, state->chptr->mode.apass);
3097 send_reply(state->sptr, RPL_APASSWARN_SECRET, state->chptr->chname,
3098 state->chptr->mode.apass);
3100 /* Give the channel manager level 0 ops.
3101 There should not be tested for IsChannelManager here because
3102 on the local server it is impossible to set the apass if one
3103 isn't a channel manager and remote servers might need to sync
3104 the oplevel here: when someone creates a channel (and becomes
3105 channel manager) during a net.break, and only sets the Apass
3106 after the net rejoined, they will have oplevel MAXOPLEVEL on
3107 all remote servers. */
3109 SetOpLevel(state->member, 0);
3110 } else { /* remove the old apass */
3111 *state->chptr->mode.apass = '\0';
3112 /* Clear Upass so that there is never a Upass set when a zannel is burst. */
3113 *state->chptr->mode.upass = '\0';
3114 if (MyUser(state->sptr))
3115 send_reply(state->sptr, RPL_APASSWARN_CLEAR);
3116 /* Revert everyone to MAXOPLEVEL. */
3117 for (memb = state->chptr->members; memb; memb = memb->next_member) {
3118 if (memb->status & MODE_CHANOP)
3119 SetOpLevel(memb, MAXOPLEVEL);
3125 /** Compare one ban's extent to another.
3126 * This works very similarly to mmatch() but it knows about CIDR masks
3127 * and ban exceptions. If both bans are CIDR-based, compare their
3128 * address bits; otherwise, use mmatch().
3129 * @param[in] old_ban One ban.
3130 * @param[in] new_ban Another ban.
3131 * @return Zero if \a old_ban is a superset of \a new_ban, non-zero otherwise.
3134 bmatch(struct Ban *old_ban, struct Ban *new_ban)
3137 assert(old_ban != NULL);
3138 assert(new_ban != NULL);
3139 /* A ban is never treated as a superset of an exception and vice versa. */
3140 if(((old_ban->flags & BAN_EXCEPTION) && !(new_ban->flags & BAN_EXCEPTION))
3141 || (!(old_ban->flags & BAN_EXCEPTION) && (new_ban->flags & BAN_EXCEPTION)))
3143 /* If either is not an address mask, match the text masks. */
3144 if ((old_ban->flags & new_ban->flags & BAN_IPMASK) == 0)
3145 return mmatch(old_ban->banstr, new_ban->banstr);
3146 /* If the old ban has a longer prefix than new, it cannot be a superset. */
3147 if (old_ban->addrbits > new_ban->addrbits)
3149 /* Compare the masks before the hostname part. */
3150 old_ban->banstr[old_ban->nu_len] = new_ban->banstr[new_ban->nu_len] = '\0';
3151 res = mmatch(old_ban->banstr, new_ban->banstr);
3152 old_ban->banstr[old_ban->nu_len] = new_ban->banstr[new_ban->nu_len] = '@';
3155 /* If the old ban's mask mismatches, cannot be a superset. */
3156 if (!ipmask_check(&new_ban->address, &old_ban->address, old_ban->addrbits))
3158 /* Otherwise it depends on whether the old ban's text is a superset
3160 return mmatch(old_ban->banstr, new_ban->banstr);
3163 /** Add a ban from a ban list and mark bans that should be removed
3164 * because they overlap.
3166 * There are three invariants for a ban list. First, no ban may be
3167 * more specific than another ban. Second, no exception may be more
3168 * specific than another exception. Finally, no ban may be more
3169 * specific than any exception.
3171 * @param[in,out] banlist Pointer to head of list.
3172 * @param[in] newban Ban (or exception) to add (or remove).
3173 * @param[in] do_free If non-zero, free \a newban on failure.
3174 * @return Zero if \a newban could be applied, non-zero if not.
3176 int apply_ban(struct Ban **banlist, struct Ban *newban, int do_free)
3181 assert(newban->flags & (BAN_ADD|BAN_DEL));
3182 if (newban->flags & BAN_ADD) {
3184 /* If a less specific *active* entry is found, fail. */
3185 for (ban = *banlist; ban; ban = ban->next) {
3186 if (!bmatch(ban, newban) && !(ban->flags & BAN_DEL)) {
3191 if (!(ban->flags & (BAN_OVERLAPPED|BAN_DEL))) {
3193 totlen += strlen(ban->banstr);
3196 /* Mark more specific entries and add this one to the end of the list. */
3197 while ((ban = *banlist) != NULL) {
3198 if (!bmatch(newban, ban)) {
3199 ban->flags |= BAN_OVERLAPPED | BAN_DEL;
3201 banlist = &ban->next;
3205 } else if (newban->flags & BAN_DEL) {
3206 size_t remove_count = 0;
3207 /* Mark more specific entries. */
3208 for (ban = *banlist; ban; ban = ban->next) {
3209 if (!bmatch(newban, ban)) {
3210 ban->flags |= BAN_OVERLAPPED | BAN_DEL;
3216 /* If no matches were found, fail. */
3226 /* Removes MODE_WASDELJOINS in a channel.
3227 * Reveals all hidden users.
3229 static void reveal_hidden_chan_users(struct ParseState *state, ulong64 *flag_p) {
3230 struct Membership *member;
3232 /* If the channel is not +d, do nothing. */
3233 if(!(state->chptr->mode.mode & MODE_WASDELJOINS)) return;
3235 /* Iterate through all members and reveal them if they are hidden. */
3236 for(member = state->chptr->members; member; member = member->next_member) {
3237 if(IsDelayedJoin(member) && !IsInvisibleJoin(member)) {
3238 RevealDelayedJoin(member);
3243 /* Handle MODE_AUDITORIUM changes
3244 * set Delayed for all hidden users on MODE_DEL
3245 * part all nonoped users on MODE_ADD
3247 static void audit_chan_users(struct ParseState *state, ulong64 *flag_p) {
3248 struct Membership *member;
3249 if (state->dir == MODE_ADD) {
3250 for(member = state->chptr->members; member; member = member->next_member) {
3251 if(!IsChanOp(member) && !HasVoice(member)) {
3252 sendcmdto_channel_butserv_butone(member->user, CMD_PART, member->channel, member->user, SKIP_OPS, "%H :%s", member->channel, "mode +u set.");
3256 for(member = state->chptr->members; member; member = member->next_member) {
3257 if(!IsChanOp(member) && !HasVoice(member)) {
3258 sendcmdto_channel_butserv_butone(member->user, CMD_JOIN, member->channel, member->user, SKIP_OPS, ":%H", member->channel);
3266 * Helper function to convert bans
3269 mode_parse_ban(struct ParseState *state, ulong64 *flag_p)
3272 struct Ban *ban, *newban;
3274 if (state->parc <= 0) { /* Not enough args, send ban list */
3275 if (MyUser(state->sptr) && !(state->done & DONE_BANLIST)) {
3276 send_ban_list(state->sptr, state->chptr);
3277 state->done |= DONE_BANLIST;
3282 if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
3285 t_str = state->parv[state->args_used++]; /* grab arg */
3289 /* If they're not an oper, they can't change modes */
3290 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
3291 send_notoper(state);
3295 if ((s = strchr(t_str, ' ')))
3298 if (!*t_str || *t_str == ':') { /* warn if empty */
3299 if (MyUser(state->sptr))
3300 need_more_params(state->sptr, state->dir == MODE_ADD ? "MODE +b" :
3305 /* Clear all ADD/DEL/OVERLAPPED flags from ban list. */
3306 if (!(state->done & DONE_BANCLEAN)) {
3307 for (ban = state->chptr->banlist; ban; ban = ban->next)
3308 ban->flags &= ~(BAN_ADD | BAN_DEL | BAN_OVERLAPPED);
3309 state->done |= DONE_BANCLEAN;
3312 /* remember the ban for the moment... */
3313 newban = state->banlist + (state->numbans++);
3315 newban->flags = ((state->dir == MODE_ADD) ? BAN_ADD : BAN_DEL)
3316 | (*flag_p == MODE_BAN ? 0 : BAN_EXCEPTION);
3317 set_ban_mask(newban, collapse(pretty_mask(t_str)));
3318 ircd_strncpy(newban->who, IsUser(state->sptr) ? cli_name(state->sptr) : "*", NICKLEN);
3319 newban->when = TStime();
3320 apply_ban(&state->chptr->banlist, newban, 0);
3324 * This is the bottom half of the ban processor
3327 mode_process_bans(struct ParseState *state)
3329 struct Ban *ban, *newban, *prevban, *nextban;
3335 for (prevban = 0, ban = state->chptr->banlist; ban; ban = nextban) {
3337 banlen = strlen(ban->banstr);
3339 nextban = ban->next;
3341 if ((ban->flags & (BAN_DEL | BAN_ADD)) == (BAN_DEL | BAN_ADD)) {
3343 prevban->next = 0; /* Break the list; ban isn't a real ban */
3345 state->chptr->banlist = 0;
3351 } else if (ban->flags & BAN_DEL) { /* Deleted a ban? */
3353 DupString(bandup, ban->banstr);
3354 modebuf_mode_string(state->mbuf, MODE_DEL | MODE_BAN, bandup, 1);
3356 if (state->flags & MODE_PARSE_SET) { /* Ok, make it take effect */
3357 if (prevban) /* clip it out of the list... */
3358 prevban->next = ban->next;
3360 state->chptr->banlist = ban->next;
3367 continue; /* next ban; keep prevban like it is */
3369 ban->flags &= BAN_IPMASK; /* unset other flags */
3370 } else if (ban->flags & BAN_ADD) { /* adding a ban? */
3372 prevban->next = 0; /* Break the list; ban isn't a real ban */
3374 state->chptr->banlist = 0;
3376 /* If we're supposed to ignore it, do so. */
3377 if (ban->flags & BAN_OVERLAPPED &&
3378 !(state->flags & MODE_PARSE_BOUNCE)) {
3382 if (state->flags & MODE_PARSE_SET && MyUser(state->sptr) &&
3383 (len > (feature_int(FEAT_AVBANLEN) * feature_int(FEAT_MAXBANS)) ||
3384 count > feature_int(FEAT_MAXBANS))) {
3385 send_reply(state->sptr, ERR_BANLISTFULL, state->chptr->chname,
3391 /* add the ban to the buffer */
3392 DupString(bandup, ban->banstr);
3393 modebuf_mode_string(state->mbuf, MODE_ADD | MODE_BAN, bandup, 1);
3395 if (state->flags & MODE_PARSE_SET) { /* create a new ban */
3396 newban = make_ban(ban->banstr);
3397 strcpy(newban->who, ban->who);
3398 newban->when = ban->when;
3399 newban->flags = ban->flags & BAN_IPMASK;
3401 newban->next = state->chptr->banlist; /* and link it in */
3402 state->chptr->banlist = newban;
3411 } /* for (prevban = 0, ban = state->chptr->banlist; ban; ban = nextban) { */
3413 if (changed) /* if we changed the ban list, we must invalidate the bans */
3414 mode_ban_invalidate(state->chptr);
3418 * Helper function to process client changes
3421 mode_parse_client(struct ParseState *state, ulong64 *flag_p)
3425 struct Client *acptr;
3426 struct Membership *member;
3427 int oplevel = MAXOPLEVEL + 1;
3431 if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
3434 if (state->parc <= 0) /* return if not enough args */
3437 t_str = state->parv[state->args_used++]; /* grab arg */
3441 /* If they're not an oper, they can't change modes */
3442 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
3443 send_notoper(state);
3447 if (MyUser(state->sptr)) {
3448 colon = strchr(t_str, ':');
3449 if (colon != NULL) {
3451 req_oplevel = atoi(colon);
3452 if (*flag_p == CHFL_VOICE || state->dir == MODE_DEL) {
3453 /* Ignore the colon and its argument. */
3454 } else if (!(state->flags & MODE_PARSE_FORCE)
3456 && (req_oplevel < OpLevel(state->member)
3457 || (req_oplevel == OpLevel(state->member)
3458 && OpLevel(state->member) < MAXOPLEVEL)
3459 || req_oplevel > MAXOPLEVEL)) {
3460 send_reply(state->sptr, ERR_NOTLOWEROPLEVEL,
3461 t_str, state->chptr->chname,
3462 OpLevel(state->member), req_oplevel, "op",
3463 OpLevel(state->member) == req_oplevel ? "the same" : "a higher");
3464 } else if (req_oplevel <= MAXOPLEVEL)
3465 oplevel = req_oplevel;
3467 /* find client we're manipulating */
3468 acptr = find_chasing(state->sptr, t_str, NULL);
3470 if (t_str[5] == ':') {
3472 oplevel = atoi(t_str + 6);
3474 acptr = findNUser(t_str);
3478 return; /* find_chasing() already reported an error to the user */
3480 for (i = 0; i < MAXPARA; i++) /* find an element to stick them in */
3481 if (!state->cli_change[i].flag || (state->cli_change[i].client == acptr &&
3482 state->cli_change[i].flag & flag_p[0]))
3483 break; /* found a slot */
3485 /* If we are going to bounce this deop, mark the correct oplevel. */
3486 if (state->flags & MODE_PARSE_BOUNCE
3487 && state->dir == MODE_DEL
3488 && flag_p[0] == MODE_CHANOP
3489 && (member = find_member_link(state->chptr, acptr)))
3490 oplevel = OpLevel(member);
3492 /* Store what we're doing to them */
3493 state->cli_change[i].flag = state->dir | flag_p[0];
3494 state->cli_change[i].oplevel = oplevel;
3495 state->cli_change[i].client = acptr;
3499 * Helper function to process the changed client list
3502 mode_process_clients(struct ParseState *state)
3505 struct Membership *member;
3507 for (i = 0; state->cli_change[i].flag; i++) {
3508 assert(0 != state->cli_change[i].client);
3510 /* look up member link */
3511 if (!(member = find_member_link(state->chptr,
3512 state->cli_change[i].client)) ||
3513 (MyUser(state->sptr) && IsZombie(member))) {
3514 if (MyUser(state->sptr))
3515 send_reply(state->sptr, ERR_USERNOTINCHANNEL,
3516 cli_name(state->cli_change[i].client),
3517 state->chptr->chname);
3520 if (member && (IsInvisibleJoin(member) && state->cli_change[i].client != state->sptr) && IsDelayedJoin(member)) {
3521 if (MyUser(state->sptr))
3522 send_reply(state->sptr, ERR_USERNOTINCHANNEL,
3523 cli_name(state->cli_change[i].client),
3524 state->chptr->chname);
3528 if ((state->cli_change[i].flag & MODE_ADD &&
3529 (state->cli_change[i].flag & member->status)) ||
3530 (state->cli_change[i].flag & MODE_DEL &&
3531 !(state->cli_change[i].flag & member->status)))
3532 continue; /* no change made, don't do anything */
3534 /* see if the deop is allowed */
3535 if ((state->cli_change[i].flag & (MODE_DEL | MODE_CHANOP)) ==
3536 (MODE_DEL | MODE_CHANOP)) {
3537 /* Prevent +k users from being deopped, but allow extra ops to deop
3538 * +k users. We do not prevent deopping _REAL_ services because /opmode
3539 * will always allow this.
3541 if(IsChannelService(state->cli_change[i].client) && !IsXtraOp(state->sptr) && state->sptr != state->cli_change[i].client) {
3542 if (state->flags & MODE_PARSE_FORCE) /* it was forced */
3543 sendto_opmask_butone(0, SNO_HACK4, "Deop of +k user on %H by %s",
3545 (IsServer(state->sptr) ? cli_name(state->sptr) :
3546 cli_name((cli_user(state->sptr))->server)));
3548 else if (MyUser(state->sptr) && state->flags & MODE_PARSE_SET) {
3549 send_reply(state->sptr, ERR_ISCHANSERVICE,
3550 cli_name(state->cli_change[i].client),
3551 state->chptr->chname);
3556 /* check deop for local user */
3557 if (MyUser(state->sptr)) {
3559 /* don't allow local opers to be deopped on local channels */
3560 if (state->cli_change[i].client != state->sptr &&
3561 IsLocalChannel(state->chptr->chname) &&
3562 HasPriv(state->cli_change[i].client, PRIV_DEOP_LCHAN)) {
3563 send_reply(state->sptr, ERR_ISOPERLCHAN,
3564 cli_name(state->cli_change[i].client),
3565 state->chptr->chname);
3569 /* Forbid deopping other members with an oplevel less than
3570 * one's own level, and other members with an oplevel the same
3571 * as one's own unless both are at MAXOPLEVEL. */
3572 if (state->sptr != state->cli_change[i].client
3574 && ((OpLevel(member) < OpLevel(state->member))
3575 || (OpLevel(member) == OpLevel(state->member)
3576 && OpLevel(member) < MAXOPLEVEL))) {
3577 int equal = (OpLevel(member) == OpLevel(state->member));
3578 send_reply(state->sptr, ERR_NOTLOWEROPLEVEL,
3579 cli_name(state->cli_change[i].client),
3580 state->chptr->chname,
3581 OpLevel(state->member), OpLevel(member),
3582 "deop", equal ? "the same" : "a higher");
3588 /* set op-level of member being opped */
3589 if ((state->cli_change[i].flag & (MODE_ADD | MODE_CHANOP)) ==
3590 (MODE_ADD | MODE_CHANOP)) {
3591 /* If a valid oplevel was specified, use it.
3592 * Otherwise, if being opped by an outsider, get MAXOPLEVEL.
3593 * Otherwise, if not an apass channel, or state->member has
3594 * MAXOPLEVEL, get oplevel MAXOPLEVEL.
3595 * Otherwise, get state->member's oplevel+1.
3597 if (state->cli_change[i].oplevel <= MAXOPLEVEL)
3598 SetOpLevel(member, state->cli_change[i].oplevel);
3599 else if (!state->member)
3600 SetOpLevel(member, MAXOPLEVEL);
3601 else if (OpLevel(state->member) >= MAXOPLEVEL)
3602 SetOpLevel(member, OpLevel(state->member));
3604 SetOpLevel(member, OpLevel(state->member) + 1);
3607 int user_visible = (member->status & CHFL_VOICED_OR_OPPED);
3609 /* actually effect the change */
3610 if (state->flags & MODE_PARSE_SET) {
3611 if (state->cli_change[i].flag & MODE_ADD) {
3612 if (IsDelayedJoin(member) && !IsZombie(member))
3613 RevealDelayedJoin(member);
3614 member->status |= (state->cli_change[i].flag &
3615 (MODE_CHANOP | MODE_VOICE));
3616 if (state->cli_change[i].flag & MODE_CHANOP)
3617 ClearDeopped(member);
3619 member->status &= ~(state->cli_change[i].flag &
3620 (MODE_CHANOP | MODE_VOICE));
3623 /* accumulate the change */
3624 modebuf_mode_client(state->mbuf, state->cli_change[i].flag,
3625 state->cli_change[i].client,
3626 state->cli_change[i].oplevel);
3628 if((member->channel->mode.mode & MODE_AUDITORIUM)) {
3629 //join or part the user
3630 if((member->status & CHFL_VOICED_OR_OPPED) && !user_visible) {
3631 sendcmdto_channel_butserv_butone(member->user, CMD_JOIN, member->channel, member->user, SKIP_OPS, ":%H", member->channel);
3632 } else if(!(member->status & CHFL_VOICED_OR_OPPED) && user_visible) {
3633 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.");
3635 if(MyUser(member->user) && (state->cli_change[i].flag & MODE_CHANOP)) {
3636 //do_names(member->user, member->channel, NAMES_ALL|NAMES_EON|((member->status & MODE_CHANOP) ? 0 : NAMES_OPS));
3637 //this is not working for all users :( so we have to send join/part events
3638 struct Membership *member2;
3639 if (state->cli_change[i].flag & MODE_ADD) {
3641 for(member2 = state->chptr->members; member2; member2 = member2->next_member) {
3642 if(!IsChanOp(member2) && !HasVoice(member2)) {
3643 sendcmdto_one(member2->user, CMD_JOIN, member->user, ":%H", member->channel);
3648 for(member2 = state->chptr->members; member2; member2 = member2->next_member) {
3649 if(!IsChanOp(member2) && !HasVoice(member2) && member != member2) {
3650 sendcmdto_one(member2->user, CMD_PART, member->user, "%H :%s", member->channel, "invisible user on +u channel.");
3656 } /* for (i = 0; state->cli_change[i].flags; i++) */
3660 * Helper function to process the simple modes
3663 mode_parse_mode(struct ParseState *state, ulong64 *flag_p)
3665 /* If they're not an oper, they can't change modes */
3666 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
3667 send_notoper(state);
3674 /* Local users are not permitted to change registration status */
3675 if (flag_p[0] == MODE_REGISTERED && !(state->flags & MODE_PARSE_FORCE) && MyUser(state->sptr))
3678 if(flag_p[0] == MODE_AUDITORIUM)
3679 audit_chan_users(state, flag_p);
3681 if (state->dir == MODE_ADD) {
3682 state->add |= flag_p[0];
3683 state->del &= ~flag_p[0];
3685 if (flag_p[0] & MODE_SECRET) {
3686 state->add &= ~MODE_PRIVATE;
3687 state->del |= MODE_PRIVATE;
3688 } else if (flag_p[0] & MODE_PRIVATE) {
3689 state->add &= ~MODE_SECRET;
3690 state->del |= MODE_SECRET;
3693 state->add &= ~flag_p[0];
3694 state->del |= flag_p[0];
3697 assert(0 == (state->add & state->del));
3698 assert((MODE_SECRET | MODE_PRIVATE) !=
3699 (state->add & (MODE_SECRET | MODE_PRIVATE)));
3703 * This routine is intended to parse MODE or OPMODE commands and effect the
3704 * changes (or just build the bounce buffer).
3706 * \param[out] mbuf Receives parsed representation of mode change.
3707 * \param[in] cptr Connection that sent the message to this server.
3708 * \param[in] sptr Original source of the message.
3709 * \param[in] chptr Channel whose modes are being changed.
3710 * \param[in] parc Number of valid strings in \a parv.
3711 * \param[in] parv Text arguments representing mode change, with the
3712 * zero'th element containing a string like "+m" or "-o".
3713 * \param[in] flags Set of bitwise MODE_PARSE_* flags.
3714 * \param[in] member If non-null, the channel member attempting to change the modes.
3717 mode_parse(struct ModeBuf *mbuf, struct Client *cptr, struct Client *sptr,
3718 struct Channel *chptr, int parc, char *parv[], unsigned int flags,
3719 struct Membership* member)
3721 static ulong64 chan_flags[] = {
3726 MODE_MODERATED, 'm',
3727 MODE_TOPICLIMIT, 't',
3728 MODE_INVITEONLY, 'i',
3729 MODE_NOPRIVMSGS, 'n',
3733 MODE_REGISTERED, 'R',
3738 MODE_WASDELJOINS, 'd',
3744 MODE_QUARANTINE, 'Q',
3747 MODE_AUDITORIUM, 'u',
3757 struct ParseState state;
3768 state.chptr = chptr;
3769 state.member = member;
3772 state.flags = flags;
3773 state.dir = MODE_ADD;
3777 state.args_used = 0;
3778 state.max_args = MAXMODEPARAMS;
3781 for (i = 0; i < MAXPARA; i++) { /* initialize ops/voices arrays */
3782 state.banlist[i].next = 0;
3783 state.banlist[i].who[0] = '\0';
3784 state.banlist[i].when = 0;
3785 state.banlist[i].flags = 0;
3786 state.cli_change[i].flag = 0;
3787 state.cli_change[i].client = 0;
3790 modestr = state.parv[state.args_used++];
3794 for (; *modestr; modestr++) {
3795 for (flag_p = chan_flags; flag_p[0]; flag_p += 2) /* look up flag */
3796 if (flag_p[1] == *modestr)
3799 if (!flag_p[0]) { /* didn't find it? complain and continue */
3800 if (MyUser(state.sptr))
3801 send_reply(state.sptr, ERR_UNKNOWNMODE, *modestr);
3806 case '+': /* switch direction to MODE_ADD */
3807 case '-': /* switch direction to MODE_DEL */
3808 state.dir = flag_p[0];
3811 case 'l': /* deal with limits */
3812 mode_parse_limit(&state, flag_p);
3814 case 'a': /* deal with limits */
3815 mode_parse_access(&state, flag_p);
3818 mode_parse_altchan(&state, flag_p);
3821 mode_parse_noflood(&state, flag_p);
3824 if(IsNetServ(state.sptr) && IsSecurityServ(state.sptr))
3825 mode_parse_mode(&state, flag_p);
3827 case 'k': /* deal with keys */
3828 mode_parse_key(&state, flag_p);
3830 case 'A': /* deal with Admin passes */
3831 if (IsServer(cptr) || feature_bool(FEAT_OPLEVELS))
3832 mode_parse_apass(&state, flag_p);
3834 case 'U': /* deal with user passes */
3835 if (IsServer(cptr) || feature_bool(FEAT_OPLEVELS))
3836 mode_parse_upass(&state, flag_p);
3838 case 'b': /* deal with bans */
3839 mode_parse_ban(&state, flag_p);
3842 case 'd': /* deal with hidden members */
3843 reveal_hidden_chan_users(&state, flag_p);
3846 case 'o': /* deal with ops/voice */
3848 mode_parse_client(&state, flag_p);
3851 case 'z': /* remote clients are allowed to change +z */
3852 if(!MyUser(state.sptr) || (state.flags & MODE_PARSE_FORCE))
3853 mode_parse_mode(&state, flag_p);
3855 case 'O': /* remote clients are allowed to change +z */
3856 //struct User* user = cli_user(cptr);
3857 //|| (chptr.chanowner && IsAccount(cptr) && chptr.chanowner == user->account)
3858 if(!MyUser(state.sptr) || (state.flags & MODE_PARSE_FORCE) )
3859 mode_parse_mode(&state, flag_p);
3862 default: /* deal with other modes */
3863 mode_parse_mode(&state, flag_p);
3865 } /* switch (*modestr) */
3866 } /* for (; *modestr; modestr++) */
3868 if (state.flags & MODE_PARSE_BURST)
3869 break; /* don't interpret any more arguments */
3871 if (state.parc > 0) { /* process next argument in string */
3872 modestr = state.parv[state.args_used++];
3876 if (IsServer(state.cptr) && !state.parc && IsDigit(*modestr)) {
3879 if (!(state.flags & MODE_PARSE_SET)) /* don't set earlier TS if */
3880 break; /* we're then going to bounce the mode! */
3882 recv_ts = atoi(modestr);
3884 if (recv_ts && recv_ts < state.chptr->creationtime)
3885 state.chptr->creationtime = recv_ts; /* respect earlier TS */
3886 else if (recv_ts > state.chptr->creationtime) {
3887 struct Client *sserv;
3889 /* Check whether the originating server has fully processed
3890 * the burst to it. */
3892 if (!IsServer(sserv))
3893 sserv = cli_user(sserv)->server;
3894 if (IsBurstOrBurstAck(sserv)) {
3895 /* This is a legal but unusual case; the source server
3896 * probably just has not processed the BURST for this
3897 * channel. It SHOULD wipe out all its modes soon, so
3898 * silently ignore the mode change rather than send a
3899 * bounce that could desync modes from our side (that
3900 * have already been sent).
3902 state.mbuf->mb_add = 0;
3903 state.mbuf->mb_rem = 0;
3904 state.mbuf->mb_count = 0;
3905 return state.args_used;
3907 /* Server is desynced; bounce the mode and deop the source
3909 state.flags &= ~MODE_PARSE_SET;
3910 state.flags |= MODE_PARSE_BOUNCE;
3911 state.mbuf->mb_dest &= ~(MODEBUF_DEST_CHANNEL | MODEBUF_DEST_HACK4);
3912 state.mbuf->mb_dest |= MODEBUF_DEST_BOUNCE | MODEBUF_DEST_HACK2;
3913 if (!IsServer(state.cptr))
3914 state.mbuf->mb_dest |= MODEBUF_DEST_DEOP;
3918 break; /* break out of while loop */
3919 } else if (state.flags & MODE_PARSE_STRICT ||
3920 (MyUser(state.sptr) && state.max_args <= 0)) {
3921 state.parc++; /* we didn't actually gobble the argument */
3923 break; /* break out of while loop */
3926 } /* while (*modestr) */
3929 * the rest of the function finishes building resultant MODEs; if the
3930 * origin isn't a member or an oper, skip it.
3932 if (!state.mbuf || state.flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER))
3933 return state.args_used; /* tell our parent how many args we gobbled */
3935 t_mode = state.chptr->mode.mode;
3937 if (state.del & t_mode) { /* delete any modes to be deleted... */
3938 modebuf_mode(state.mbuf, MODE_DEL | (state.del & t_mode));
3940 t_mode &= ~state.del;
3942 if (state.add & ~t_mode) { /* add any modes to be added... */
3943 modebuf_mode(state.mbuf, MODE_ADD | (state.add & ~t_mode));
3945 t_mode |= state.add;
3948 if (state.flags & MODE_PARSE_SET) { /* set the channel modes */
3949 if ((state.chptr->mode.mode & MODE_INVITEONLY) &&
3950 !(t_mode & MODE_INVITEONLY))
3951 mode_invite_clear(state.chptr);
3953 state.chptr->mode.mode = t_mode;
3956 if (state.flags & MODE_PARSE_WIPEOUT) {
3957 if (state.chptr->mode.limit && !(state.done & DONE_LIMIT))
3958 modebuf_mode_uint(state.mbuf, MODE_DEL | MODE_LIMIT,
3959 state.chptr->mode.limit);
3960 if (state.chptr->mode.access && !(state.done & DONE_ACCESS))
3961 modebuf_mode_uint(state.mbuf, MODE_DEL | MODE_ACCESS,
3962 state.chptr->mode.access);
3963 if (state.chptr->mode.altchan && !(state.done & DONE_ALTCHAN))
3964 modebuf_mode_string(state.mbuf, MODE_DEL | MODE_ALTCHAN,
3965 state.chptr->mode.altchan, 0);
3966 if (state.chptr->mode.noflood && !(state.done & DONE_NOFLOOD))
3967 modebuf_mode_string(state.mbuf, MODE_DEL | MODE_NOFLOOD,
3968 state.chptr->mode.noflood, 0);
3969 if (*state.chptr->mode.key && !(state.done & DONE_KEY_DEL))
3970 modebuf_mode_string(state.mbuf, MODE_DEL | MODE_KEY,
3971 state.chptr->mode.key, 0);
3972 if (*state.chptr->mode.upass && !(state.done & DONE_UPASS_DEL))
3973 modebuf_mode_string(state.mbuf, MODE_DEL | MODE_UPASS,
3974 state.chptr->mode.upass, 0);
3975 if (*state.chptr->mode.apass && !(state.done & DONE_APASS_DEL))
3976 modebuf_mode_string(state.mbuf, MODE_DEL | MODE_APASS,
3977 state.chptr->mode.apass, 0);
3980 if (state.done & DONE_BANCLEAN) /* process bans */
3981 mode_process_bans(&state);
3983 /* process client changes */
3984 if (state.cli_change[0].flag)
3985 mode_process_clients(&state);
3987 return state.args_used; /* tell our parent how many args we gobbled */
3991 * Initialize a join buffer
3994 joinbuf_init(struct JoinBuf *jbuf, struct Client *source,
3995 struct Client *connect, unsigned int type, char *comment,
4001 assert(0 != source);
4002 assert(0 != connect);
4004 jbuf->jb_source = source; /* just initialize struct JoinBuf */
4005 jbuf->jb_connect = connect;
4006 jbuf->jb_type = type;
4007 jbuf->jb_comment = comment;
4008 jbuf->jb_create = create;
4010 jbuf->jb_strlen = (((type == JOINBUF_TYPE_JOIN ||
4011 type == JOINBUF_TYPE_PART ||
4012 type == JOINBUF_TYPE_PARTALL) ?
4013 STARTJOINLEN : STARTCREATELEN) +
4014 (comment ? strlen(comment) + 2 : 0));
4016 for (i = 0; i < MAXJOINARGS; i++)
4017 jbuf->jb_channels[i] = 0;
4021 * Add a channel to the join buffer
4024 joinbuf_join(struct JoinBuf *jbuf, struct Channel *chan, unsigned int flags)
4032 sendcmdto_serv_butone(jbuf->jb_source, CMD_JOIN, jbuf->jb_connect, "0");
4036 is_local = IsLocalChannel(chan->chname);
4038 if (jbuf->jb_type == JOINBUF_TYPE_PART ||
4039 jbuf->jb_type == JOINBUF_TYPE_PARTALL) {
4040 struct Membership *member = find_member_link(chan, jbuf->jb_source);
4041 if (IsUserParting(member))
4043 SetUserParting(member);
4045 /* Send notification to channel */
4046 if((chan->mode.mode & MODE_AUDITORIUM) && !(member->status & CHFL_VOICED_OR_OPPED)) {
4047 //send part to ops only
4048 sendcmdto_channel_butserv_butone(jbuf->jb_source, CMD_PART, chan, NULL, SKIP_NONOPS, "%H :%s", chan, jbuf->jb_comment);
4049 if(MyUser(jbuf->jb_source))
4050 sendcmdto_one(jbuf->jb_source, CMD_PART, jbuf->jb_source, "%H :%s", chan, jbuf->jb_comment);
4051 } else if (!(flags & (CHFL_ZOMBIE | CHFL_DELAYED)))
4052 sendcmdto_channel_butserv_butone(jbuf->jb_source, CMD_PART, chan, NULL, 0,
4053 (flags & CHFL_BANNED || !jbuf->jb_comment) ?
4054 ":%H" : "%H :%s", chan, jbuf->jb_comment);
4055 else if (MyUser(jbuf->jb_source))
4056 sendcmdto_one(jbuf->jb_source, CMD_PART, jbuf->jb_source,
4057 (flags & CHFL_BANNED || !jbuf->jb_comment) ?
4058 ":%H" : "%H :%s", chan, jbuf->jb_comment);
4059 /* XXX: Shouldn't we send a PART here anyway? */
4060 /* to users on the channel? Why? From their POV, the user isn't on
4061 * the channel anymore anyway. We don't send to servers until below,
4062 * when we gang all the channel parts together. Note that this is
4063 * exactly the same logic, albeit somewhat more concise, as was in
4064 * the original m_part.c */
4066 if (jbuf->jb_type == JOINBUF_TYPE_PARTALL ||
4067 is_local) /* got to remove user here */
4068 remove_user_from_channel(jbuf->jb_source, chan);
4070 int oplevel = !chan->mode.apass[0] ? MAXOPLEVEL
4071 : (flags & CHFL_CHANNEL_MANAGER) ? 0
4073 /* Add user to channel */
4074 if (((chan->mode.mode & MODE_DELJOINS) && !(flags & CHFL_VOICED_OR_OPPED)) || ((flags & CHFL_INVISIBLE) && !(flags & CHFL_VOICED_OR_OPPED))) {
4075 add_user_to_channel(chan, jbuf->jb_source, flags | CHFL_DELAYED, oplevel);
4077 add_user_to_channel(chan, jbuf->jb_source, flags, oplevel);
4079 /* send JOIN notification to all servers (CREATE is sent later). */
4080 if (jbuf->jb_type != JOINBUF_TYPE_CREATE && !is_local) {
4081 if ((flags & CHFL_INVISIBLE) && !(flags & CHFL_VOICED_OR_OPPED)) {
4082 sendcmdto_serv_butone(jbuf->jb_source, CMD_JOIN, jbuf->jb_connect,
4083 "%H %Tu %i", chan, chan->creationtime, 1);
4085 sendcmdto_serv_butone(jbuf->jb_source, CMD_JOIN, jbuf->jb_connect,
4086 "%H %Tu %i", chan, chan->creationtime, 0);
4090 if((chan->mode.mode & MODE_AUDITORIUM) && !(flags & CHFL_VOICED_OR_OPPED)) {
4091 //we have to send this JOIN event to ops only...
4092 sendcmdto_channel_butserv_butone(jbuf->jb_source, CMD_JOIN, chan, NULL, SKIP_NONOPS, "%H", chan);
4093 if(MyUser(jbuf->jb_source))
4094 sendcmdto_one(jbuf->jb_source, CMD_JOIN, jbuf->jb_source, ":%H", chan);
4096 else if (!((chan->mode.mode & MODE_DELJOINS) && !(flags & CHFL_VOICED_OR_OPPED)) && !((flags & CHFL_INVISIBLE) && !(flags & CHFL_VOICED_OR_OPPED))) {
4097 /* Send the notification to the channel */
4098 sendcmdto_channel_butserv_butone(jbuf->jb_source, CMD_JOIN, chan, NULL, 0, "%H", chan);
4100 /* send an op, too, if needed */
4101 if (flags & CHFL_CHANOP && (oplevel < MAXOPLEVEL || !MyUser(jbuf->jb_source)))
4102 sendcmdto_channel_butserv_butone((chan->mode.apass[0] ? &his : jbuf->jb_source),
4103 CMD_MODE, chan, NULL, 0, "%H +o %C",
4104 chan, jbuf->jb_source);
4105 } else if (MyUser(jbuf->jb_source)) {
4106 sendcmdto_one(jbuf->jb_source, CMD_JOIN, jbuf->jb_source, ":%H", chan);
4110 if (jbuf->jb_type == JOINBUF_TYPE_PARTALL ||
4111 jbuf->jb_type == JOINBUF_TYPE_JOIN || is_local)
4112 return; /* don't send to remote */
4114 /* figure out if channel name will cause buffer to be overflowed */
4115 len = chan ? strlen(chan->chname) + 1 : 2;
4116 if (jbuf->jb_strlen + len > BUFSIZE)
4117 joinbuf_flush(jbuf);
4119 /* add channel to list of channels to send and update counts */
4120 jbuf->jb_channels[jbuf->jb_count++] = chan;
4121 jbuf->jb_strlen += len;
4123 /* if we've used up all slots, flush */
4124 if (jbuf->jb_count >= MAXJOINARGS)
4125 joinbuf_flush(jbuf);
4129 * Flush the channel list to remote servers
4132 joinbuf_flush(struct JoinBuf *jbuf)
4134 char chanlist[BUFSIZE];
4138 if (!jbuf->jb_count || jbuf->jb_type == JOINBUF_TYPE_PARTALL ||
4139 jbuf->jb_type == JOINBUF_TYPE_JOIN)
4140 return 0; /* no joins to process */
4142 for (i = 0; i < jbuf->jb_count; i++) { /* build channel list */
4143 build_string(chanlist, &chanlist_i,
4144 jbuf->jb_channels[i] ? jbuf->jb_channels[i]->chname : "0", 0,
4145 i == 0 ? '\0' : ',');
4146 if (JOINBUF_TYPE_PART == jbuf->jb_type)
4147 /* Remove user from channel */
4148 remove_user_from_channel(jbuf->jb_source, jbuf->jb_channels[i]);
4150 jbuf->jb_channels[i] = 0; /* mark slot empty */
4153 jbuf->jb_count = 0; /* reset base counters */
4154 jbuf->jb_strlen = ((jbuf->jb_type == JOINBUF_TYPE_PART ?
4155 STARTJOINLEN : STARTCREATELEN) +
4156 (jbuf->jb_comment ? strlen(jbuf->jb_comment) + 2 : 0));
4158 /* and send the appropriate command */
4159 switch (jbuf->jb_type) {
4160 case JOINBUF_TYPE_CREATE:
4161 sendcmdto_serv_butone(jbuf->jb_source, CMD_CREATE, jbuf->jb_connect,
4162 "%s %Tu", chanlist, jbuf->jb_create);
4165 case JOINBUF_TYPE_PART:
4166 sendcmdto_serv_butone(jbuf->jb_source, CMD_PART, jbuf->jb_connect,
4167 jbuf->jb_comment ? "%s :%s" : "%s", chanlist,
4175 /* Returns TRUE (1) if client is invited, FALSE (0) if not */
4176 int IsInvited(struct Client* cptr, const void* chptr)
4180 for (lp = (cli_user(cptr))->invited; lp; lp = lp->next)
4181 if (lp->value.chptr == chptr)
4186 /* RevealDelayedJoin: sends a join for a hidden user */
4188 void RevealDelayedJoin(struct Membership *member)
4190 ClearDelayedJoin(member);
4191 sendcmdto_channel_butserv_butone(member->user, CMD_JOIN, member->channel, member->user, 0, ":%H",
4193 CheckDelayedJoins(member->channel);
4196 /* CheckDelayedJoins: checks and clear +d if necessary */
4198 void CheckDelayedJoins(struct Channel *chan)
4200 if ((chan->mode.mode & MODE_WASDELJOINS) && !find_delayed_joins(chan)) {
4201 chan->mode.mode &= ~MODE_WASDELJOINS;
4202 sendcmdto_channel_butserv_butone(&me, CMD_MODE, chan, NULL, 0,
4204 sendcmdto_channel_servers_butone(&me, CMD_MODE, chan, NULL, 0,
4209 void CheckEnableDelayedJoins(struct Channel *chan) {
4210 if (!(chan->mode.mode & MODE_WASDELJOINS) && find_delayed_joins(chan)) {
4211 chan->mode.mode |= MODE_WASDELJOINS;
4212 sendcmdto_channel_butserv_butone(&me, CMD_MODE, chan, NULL, 0,
4214 sendcmdto_channel_servers_butone(&me, CMD_MODE, chan, NULL, 0,
4219 /* checks whether a channel is nonpersistent with no users and deletes it
4220 * returns 1 if deleted, otherwise 0
4222 signed int destruct_nonpers_channel(struct Channel *chptr) {
4223 if(!(chptr->mode.mode & MODE_PERSIST) && chptr->users == 0) {
4224 if(chptr->destruct_event)
4225 remove_destruct_event(chptr);
4226 destruct_channel(chptr);
4232 /** Send a join for the user if (s)he is a hidden member of the channel.
4234 void RevealDelayedJoinIfNeeded(struct Client *sptr, struct Channel *chptr)
4236 struct Membership *member = find_member_link(chptr, sptr);
4237 if (member && IsDelayedJoin(member) && !IsInvisibleJoin(member))
4238 RevealDelayedJoin(member);
4241 /** Extended multi target message block check.
4242 * The channelmode MODE_NOAMSGS prevents multi-target messages from being sent
4243 * to the channel. Since many clients sent these so called AMSGS manually with
4244 * one PRIVMSG per channel, we have this extended check which prevents messages
4245 * from being sent to multiple channels.
4247 * The check is quite simple: We save the last sent message of every client.
4248 * When the client sends a new PRIVMSG to another channel, we compare the
4249 * message to the previously sent message and if they equal we may drop the new
4250 * message instead of broadcasting it.
4251 * There are several additional checks. That is, the new message must be sent in
4252 * a specific amount of time in which this check works. If the ducplicate
4253 * message is delayed for too long then it will pass this check. Furthermore,
4254 * there is a specific number a message must be already sent to different
4255 * channels until it is blocked.
4256 * Both numbers can be configured by the FEATURES subsystem.
4258 * This function returns 0 if the message may pass and 1 if the message should
4260 * For this function to work properly it must be called on every PRIVMSG which
4261 * is sent by any user.
4263 * Since users are creative and sometimes smart (damnit!) this function can be
4264 * outsourced into a dynamic library so we can adjust this function to protect
4265 * against any user scripts on-the-fly.
4269 int ext_amsg_block(struct Client *cptr, struct Channel *chptr, const char *msg)
4273 /* First on every message we check whether the mechanism is enabled.
4274 * If it is enabled, we check:
4275 * - whether the channel has MODE_NOAMSGS
4276 * - whether it was sent in between the configured time span
4277 * - whether it matches the previous message
4278 * in exactly this order. If at least one test fails, we do not block the
4280 * If at least one test failed we copy the message into the users buffer so
4281 * it will be checked the next time he sends a message. We also update the
4282 * timestamp of the user.
4284 amsg_time = feature_int(FEAT_NOAMSG_TIME);
4286 /* first of all strip the message (filter out invisible content) */
4287 char *stripped_message = MyMalloc(BUFSIZE + 1);
4288 strcpy(stripped_message, msg);
4289 char p = stripped_message[0];
4291 int is_visible = 1, is_ccode = 0, i = 0, j = 0;
4293 for(i = 0; p != '\n'; p = stripped_message[++i]) {
4297 } else if(is_ccode) {
4298 if((p >= 48 && p <= 57) || p == 44) {
4308 if(p != codes[j++]) {
4313 //END of color code...
4315 if(is_ccode != 1 && codes[j] != 0) is_ccode = 3;
4319 for(k = 0; k < j-1; k++) {
4320 if(codes[k] != 48) {
4326 } else if(is_ccode == 2) {
4328 } else if(is_ccode == 3) {
4336 stripped_message[p_pos++] = p;
4339 stripped_message[p_pos++] = 0;
4340 /* Allocate a new buffer if there is none, yet. */
4341 if(!cli_user(cptr)->lastmsg) {
4342 cli_user(cptr)->lastmsg = MyMalloc(BUFSIZE + 1);
4343 memset(cli_user(cptr)->lastmsg, 0, BUFSIZE + 1);
4345 if((chptr->mode.mode & MODE_NOAMSGS) &&
4346 ((cli_user(cptr)->lastmsg_time + amsg_time) >= CurrentTime) &&
4347 (strcmp(cli_user(cptr)->lastmsg, stripped_message) == 0)) {
4348 cli_user(cptr)->lastmsg_time = CurrentTime;
4349 cli_user(cptr)->lastmsg_num++;
4350 MyFree(stripped_message);
4351 if(cli_user(cptr)->lastmsg_num >= feature_int(FEAT_NOAMSG_NUM)) return 1;
4354 /* Message did not match so update the data. */
4355 cli_user(cptr)->lastmsg_time = CurrentTime;
4356 cli_user(cptr)->lastmsg_num = 0;
4357 strcpy(cli_user(cptr)->lastmsg, stripped_message);
4358 MyFree(stripped_message);
4363 /** Extended flood check.
4364 * The channelmode MODE_NOFLOOD prevents users from flooding the channel.
4366 * This function returns 0 if the message may pass and 1 if the message should
4368 * For this function to work properly it must be called on every PRIVMSG which
4369 * is sent by any user.
4373 int ext_noflood_block(struct Client *cptr, struct Channel *chptr) {
4374 if(!*chptr->mode.noflood) return 0;
4375 struct Membership *member = find_member_link(chptr, cptr);
4376 if(!member) return 0; //TODO: we've no check for -n channels implemented, yet
4377 //check if this user is really affected by +f
4378 unsigned int flags = (chptr->mode.noflood_value & 0x00000007); //0000 0000 0000 0000 0000 0000 0000 0111 = 0x00000007 >> 0
4379 unsigned int count = (chptr->mode.noflood_value & 0x00001ff8) >> 3; //0000 0000 0000 0000 0001 1111 1111 1000 = 0x00001ff8 >> 3
4380 int time = (chptr->mode.noflood_value & 0x07ffe000) >> 13; //0000 0111 1111 1111 1110 0000 0000 0000 = 0x07ffe000 >> 13
4381 if(count == 0 || time == 0) return 0;
4382 if(!(flags & FLFL_NOFLOOD) && HasPriv(cptr, PRIV_FLOOD))
4384 if(!(flags & FLFL_CHANOP) && (member->status & CHFL_CHANOP))
4386 if(!(flags & (FLFL_CHANOP | FLFL_VOICE)) && (member->status & CHFL_VOICE))
4389 struct MemberFlood *floodnode, *prev_floodnode;
4390 for (floodnode = member->flood; floodnode; floodnode = floodnode->next_memberflood) {
4391 if(floodnode->time + time > CurrentTime) {
4392 if(floodcount == 0 && floodnode != member->flood) {
4394 prev_floodnode->next_memberflood = free_MemberFlood;
4395 free_MemberFlood = prev_floodnode;
4396 member->flood = floodnode;
4400 prev_floodnode = floodnode;
4402 Debug((DEBUG_INFO, "floodcount: %i", floodcount));
4403 if(floodcount >= count) return 1; //blocked!
4404 //add a new floodnode :)
4405 if(free_MemberFlood) {
4406 floodnode = free_MemberFlood;
4407 free_MemberFlood = floodnode->next_memberflood;
4409 floodnode = (struct MemberFlood*) MyMalloc(sizeof(struct MemberFlood));
4410 floodnode->time = CurrentTime;
4411 floodnode->next_memberflood = NULL;
4413 prev_floodnode->next_memberflood = floodnode;
4415 member->flood = floodnode;