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 if(!(lp->flags & BAN_EXCEPTION))
1285 send_reply(cptr, RPL_BANLIST, chptr->chname, lp->banstr,
1289 send_reply(cptr, RPL_ENDOFBANLIST, chptr->chname);
1292 /** send an exceptionlist to a client for a channel
1294 * @param cptr Client to send the exceptionlist to.
1295 * @param chptr Channel whose exceptionlist to send.
1297 static void send_exception_list(struct Client* cptr, struct Channel* chptr)
1304 for (lp = chptr->banlist; lp; lp = lp->next) {
1305 if(lp->flags & BAN_EXCEPTION)
1306 send_reply(cptr, RPL_EXCEPTIONLIST, chptr->chname, lp->banstr,
1310 send_reply(cptr, RPL_ENDOFEXCEPTIONLIST, chptr->chname);
1313 /** Get a channel block, creating if necessary.
1314 * Get Channel block for chname (and allocate a new channel
1315 * block, if it didn't exists before).
1317 * @param cptr Client joining the channel.
1318 * @param chname The name of the channel to join.
1319 * @param flag set to CGT_CREATE to create the channel if it doesn't
1322 * @returns NULL if the channel is invalid, doesn't exist and CGT_CREATE
1323 * wasn't specified or a pointer to the channel structure
1325 struct Channel *get_channel(struct Client *cptr, char *chname, ChannelGetType flag)
1327 struct Channel *chptr;
1330 if (EmptyString(chname))
1333 len = strlen(chname);
1334 if (MyUser(cptr) && len > CHANNELLEN)
1337 *(chname + CHANNELLEN) = '\0';
1339 if ((chptr = FindChannel(chname)))
1341 if (flag == CGT_CREATE)
1343 chptr = (struct Channel*) MyMalloc(sizeof(struct Channel) + len);
1345 ++UserStats.channels;
1346 memset(chptr, 0, sizeof(struct Channel));
1347 strcpy(chptr->chname, chname);
1348 if (GlobalChannelList)
1349 GlobalChannelList->prev = chptr;
1351 chptr->next = GlobalChannelList;
1352 chptr->creationtime = MyUser(cptr) ? TStime() : (time_t) 0;
1353 GlobalChannelList = chptr;
1359 /** invite a user to a channel.
1361 * Adds an invite for a user to a channel. Limits the number of invites
1362 * to FEAT_MAXCHANNELSPERUSER. Does not sent notification to the user.
1364 * @param cptr The client to be invited.
1365 * @param chptr The channel to be invited to.
1367 void add_invite(struct Client *cptr, struct Channel *chptr)
1369 struct SLink *inv, **tmp;
1370 unsigned int maxchans;
1372 del_invite(cptr, chptr);
1374 * Delete last link in chain if the list is max length
1376 assert(list_length((cli_user(cptr))->invited) == (cli_user(cptr))->invites);
1377 maxchans = cli_confs(cptr)->value.aconf ? ConfMaxChannels(cli_confs(cptr)->value.aconf) : feature_int(FEAT_MAXCHANNELSPERUSER);
1378 if (((cli_user(cptr))->invites >= maxchans && !HasPriv(cptr, PRIV_CHAN_LIMIT)) || cli_user(cptr)->invites > 100) /* Hard limit of 100. */
1379 del_invite(cptr, (cli_user(cptr))->invited->value.chptr);
1381 * Add client to channel invite list
1384 inv->value.cptr = cptr;
1385 inv->next = chptr->invites;
1386 chptr->invites = inv;
1388 * Add channel to the end of the client invite list
1390 for (tmp = &((cli_user(cptr))->invited); *tmp; tmp = &((*tmp)->next));
1392 inv->value.chptr = chptr;
1395 (cli_user(cptr))->invites++;
1398 /** Delete an invite
1399 * Delete Invite block from channel invite list and client invite list
1401 * @param cptr Client pointer
1402 * @param chptr Channel pointer
1404 void del_invite(struct Client *cptr, struct Channel *chptr)
1406 struct SLink **inv, *tmp;
1408 for (inv = &(chptr->invites); (tmp = *inv); inv = &tmp->next)
1409 if (tmp->value.cptr == cptr)
1414 (cli_user(cptr))->invites--;
1418 for (inv = &((cli_user(cptr))->invited); (tmp = *inv); inv = &tmp->next)
1419 if (tmp->value.chptr == chptr)
1428 /** @page zombie Explanation of Zombies
1432 * A channel member is turned into a zombie when he is kicked from a
1433 * channel but his server has not acknowledged the kick. Servers that
1434 * see the member as a zombie can accept actions he performed before
1435 * being kicked, without allowing chanop operations from outsiders or
1436 * desyncing the network.
1444 * X --a--> A --b--> B --d--> D
1449 * Where `who' is being KICK-ed by a "KICK" message received by server 'A'
1450 * via 'a', or on server 'B' via either 'b' or 'c', or on server D via 'd'.
1452 * a) On server A : set CHFL_ZOMBIE for `who' (lp) and pass on the KICK.
1453 * Remove the user immediately when no users are left on the channel.
1454 * b) On server B : remove the user (who/lp) from the channel, send a
1455 * PART upstream (to A) and pass on the KICK.
1456 * c) KICKed by `client'; On server B : remove the user (who/lp) from the
1457 * channel, and pass on the KICK.
1458 * d) On server D : remove the user (who/lp) from the channel, and pass on
1462 * - Setting the ZOMBIE flag never hurts, we either remove the
1463 * client after that or we don't.
1464 * - The KICK message was already passed on, as should be in all cases.
1465 * - `who' is removed in all cases except case a) when users are left.
1466 * - A PART is only sent upstream in case b).
1472 * 1 --- 2 --- 3 --- 4 --- 5
1477 * We also need to turn 'who' into a zombie on servers 1 and 6,
1478 * because a KICK from 'who' (kicking someone else in that direction)
1479 * can arrive there afterward - which should not be bounced itself.
1480 * Therefore case a) also applies for servers 1 and 6.
1485 /** Turn a user on a channel into a zombie
1486 * This function turns a user into a zombie (see \ref zombie)
1488 * @param member The structure representing this user on this channel.
1489 * @param who The client that is being kicked.
1490 * @param cptr The connection the kick came from.
1491 * @param sptr The client that is doing the kicking.
1492 * @param chptr The channel the user is being kicked from.
1494 void make_zombie(struct Membership* member, struct Client* who,
1495 struct Client* cptr, struct Client* sptr, struct Channel* chptr)
1497 assert(0 != member);
1502 /* Default for case a): */
1505 /* Case b) or c) ?: */
1506 if (MyUser(who)) /* server 4 */
1508 if (IsServer(cptr)) /* Case b) ? */
1509 sendcmdto_one(who, CMD_PART, cptr, "%H", chptr);
1510 remove_user_from_channel(who, chptr);
1513 if (cli_from(who) == cptr) /* True on servers 1, 5 and 6 */
1515 struct Client *acptr = IsServer(sptr) ? sptr : (cli_user(sptr))->server;
1516 for (; acptr != &me; acptr = (cli_serv(acptr))->up)
1517 if (acptr == (cli_user(who))->server) /* Case d) (server 5) */
1519 remove_user_from_channel(who, chptr);
1524 /* Case a) (servers 1, 2, 3 and 6) */
1525 if (channel_all_zombies(chptr))
1526 remove_user_from_channel(who, chptr);
1528 /* XXX Can't actually call Debug here; if the channel is all zombies,
1529 * chptr will no longer exist when we get here.
1530 Debug((DEBUG_INFO, "%s is now a zombie on %s", who->name, chptr->chname));
1534 /** returns the number of zombies on a channel
1535 * @param chptr Channel to count zombies in.
1537 * @returns The number of zombies on the channel.
1539 int number_of_zombies(struct Channel *chptr)
1541 struct Membership* member;
1545 for (member = chptr->members; member; member = member->next_member) {
1546 if (IsZombie(member))
1552 /** Concatenate some strings together.
1553 * This helper function builds an argument string in strptr, consisting
1554 * of the original string, a space, and str1 and str2 concatenated (if,
1555 * of course, str2 is not NULL)
1557 * @param strptr The buffer to concatenate into
1558 * @param strptr_i modified offset to the position to modify
1559 * @param str1 The string to concatenate from.
1560 * @param str2 The second string to contatenate from.
1561 * @param c Charactor to separate the string from str1 and str2.
1564 build_string(char *strptr, int *strptr_i, const char *str1,
1565 const char *str2, char c)
1568 strptr[(*strptr_i)++] = c;
1571 strptr[(*strptr_i)++] = *(str1++);
1575 strptr[(*strptr_i)++] = *(str2++);
1577 strptr[(*strptr_i)] = '\0';
1580 /** Flush out the modes
1581 * This is the workhorse of our ModeBuf suite; this actually generates the
1582 * output MODE commands, HACK notices, or whatever. It's pretty complicated.
1584 * @param mbuf The mode buffer to flush
1585 * @param all If true, flush all modes, otherwise leave partial modes in the
1591 modebuf_flush_int(struct ModeBuf *mbuf, int all)
1593 /* we only need the flags that don't take args right now */
1594 static ulong64 flags[] = {
1595 /* MODE_CHANOP, 'o', */
1596 /* MODE_VOICE, 'v', */
1599 MODE_MODERATED, 'm',
1600 MODE_TOPICLIMIT, 't',
1601 MODE_INVITEONLY, 'i',
1602 MODE_NOPRIVMSGS, 'n',
1605 MODE_REGISTERED, 'R',
1606 /* MODE_KEY, 'k', */
1607 /* MODE_BAN, 'b', */
1609 /* MODE_APASS, 'A', */
1610 /* MODE_UPASS, 'U', */
1614 /* MODE_EXCEPTION, 'e', */
1615 /* MODE_ALTCHAN, 'F', */
1616 /* MODE_NOFLOOD, 'f', */
1620 MODE_QUARANTINE, 'Q',
1621 MODE_AUDITORIUM, 'u',
1624 static ulong64 local_flags[] = {
1625 MODE_WASDELJOINS, 'd',
1631 struct Client *app_source; /* where the MODE appears to come from */
1633 char addbuf[20], addbuf_local[20]; /* accumulates +psmtin, etc. */
1634 int addbuf_i = 0, addbuf_local_i = 0;
1635 char rembuf[20], rembuf_local[20]; /* accumulates -psmtin, etc. */
1636 int rembuf_i = 0, rembuf_local_i = 0;
1637 char *bufptr; /* we make use of indirection to simplify the code */
1640 char addstr[BUFSIZE]; /* accumulates MODE parameters to add */
1642 char remstr[BUFSIZE]; /* accumulates MODE parameters to remove */
1644 char *strptr; /* more indirection to simplify the code */
1647 int totalbuflen = BUFSIZE - 200; /* fuzz factor -- don't overrun buffer! */
1650 char limitbuf[20],accessbuf[20]; /* convert limits to strings */
1652 ulong64 limitdel = MODE_LIMIT;
1653 ulong64 accessdel = MODE_ACCESS;
1657 /* If the ModeBuf is empty, we have nothing to do */
1658 if (mbuf->mb_add == 0 && mbuf->mb_rem == 0 && mbuf->mb_count == 0)
1661 /* Ok, if we were given the OPMODE flag, or its a server, hide the source.
1663 if (feature_bool(FEAT_HIS_MODEWHO) &&
1664 (mbuf->mb_dest & MODEBUF_DEST_OPMODE ||
1665 IsServer(mbuf->mb_source) ||
1666 IsMe(mbuf->mb_source)))
1669 app_source = mbuf->mb_source;
1672 * Account for user we're bouncing; we have to get it in on the first
1673 * bounced MODE, or we could have problems
1675 if (mbuf->mb_dest & MODEBUF_DEST_DEOP)
1676 totalbuflen -= 6; /* numeric nick == 5, plus one space */
1678 /* Calculate the simple flags */
1679 for (flag_p = flags; flag_p[0]; flag_p += 2) {
1680 if (*flag_p & mbuf->mb_add)
1681 addbuf[addbuf_i++] = flag_p[1];
1682 else if (*flag_p & mbuf->mb_rem)
1683 rembuf[rembuf_i++] = flag_p[1];
1686 /* Some flags may be for local display only. */
1687 for (flag_p = local_flags; flag_p[0]; flag_p += 2) {
1688 if (*flag_p & mbuf->mb_add)
1689 addbuf_local[addbuf_local_i++] = flag_p[1];
1690 else if (*flag_p & mbuf->mb_rem)
1691 rembuf_local[rembuf_local_i++] = flag_p[1];
1694 /* Now go through the modes with arguments... */
1695 for (i = 0; i < mbuf->mb_count; i++) {
1696 if (MB_TYPE(mbuf, i) & MODE_ADD) { /* adding or removing? */
1698 bufptr_i = &addbuf_i;
1701 bufptr_i = &rembuf_i;
1704 if (MB_TYPE(mbuf, i) & (MODE_CHANOP | MODE_VOICE)) {
1705 tmp = strlen(cli_name(MB_CLIENT(mbuf, i)));
1707 if ((totalbuflen - IRCD_MAX(9, tmp)) <= 0) /* don't overflow buffer */
1708 MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
1710 bufptr[(*bufptr_i)++] = MB_TYPE(mbuf, i) & MODE_CHANOP ? 'o' : 'v';
1711 totalbuflen -= IRCD_MAX(9, tmp) + 1;
1713 } else if (MB_TYPE(mbuf, i) & (MODE_BAN | MODE_EXCEPTION | MODE_APASS | MODE_UPASS | MODE_ALTCHAN | MODE_NOFLOOD)) {
1714 tmp = strlen(MB_STRING(mbuf, i));
1716 if ((totalbuflen - tmp) <= 0) /* don't overflow buffer */
1717 MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
1720 switch(MB_TYPE(mbuf, i) & (MODE_BAN | MODE_EXCEPTION | MODE_APASS | MODE_UPASS | MODE_ALTCHAN | MODE_NOFLOOD))
1728 case MODE_EXCEPTION:
1741 bufptr[(*bufptr_i)++] = mode_char;
1742 totalbuflen -= tmp + 1;
1744 } else if (MB_TYPE(mbuf, i) & MODE_KEY) {
1745 tmp = (mbuf->mb_dest & MODEBUF_DEST_NOKEY ? 1 :
1746 strlen(MB_STRING(mbuf, i)));
1748 if ((totalbuflen - tmp) <= 0) /* don't overflow buffer */
1749 MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
1751 bufptr[(*bufptr_i)++] = 'k';
1752 totalbuflen -= tmp + 1;
1754 } else if (MB_TYPE(mbuf, i) & (MODE_LIMIT)) {
1755 /* if it's a limit, we also format the number */
1756 ircd_snprintf(0, limitbuf, sizeof(limitbuf), "%u", MB_UINT(mbuf, i));
1758 tmp = strlen(limitbuf);
1760 if ((totalbuflen - tmp) <= 0) /* don't overflow buffer */
1761 MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
1763 bufptr[(*bufptr_i)++] = 'l';
1764 totalbuflen -= tmp + 1;
1766 } else if (MB_TYPE(mbuf, i) & (MODE_ACCESS)) {
1767 /* if it's a limit, we also format the number */
1768 ircd_snprintf(0, accessbuf, sizeof(accessbuf), "%u", MB_UINT(mbuf, i));
1770 tmp = strlen(accessbuf);
1772 if ((totalbuflen - tmp) <= 0) /* don't overflow buffer */
1773 MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
1775 bufptr[(*bufptr_i)++] = 'a';
1776 totalbuflen -= tmp + 1;
1781 /* terminate the mode strings */
1782 addbuf[addbuf_i] = '\0';
1783 rembuf[rembuf_i] = '\0';
1784 addbuf_local[addbuf_local_i] = '\0';
1785 rembuf_local[rembuf_local_i] = '\0';
1787 /* If we're building a user visible MODE or HACK... */
1788 if (mbuf->mb_dest & (MODEBUF_DEST_CHANNEL | MODEBUF_DEST_HACK2 |
1789 MODEBUF_DEST_HACK3 | MODEBUF_DEST_HACK4 |
1790 MODEBUF_DEST_LOG)) {
1791 /* Set up the parameter strings */
1797 for (i = 0; i < mbuf->mb_count; i++) {
1798 if (MB_TYPE(mbuf, i) & MODE_SAVE)
1801 if (MB_TYPE(mbuf, i) & MODE_ADD) { /* adding or removing? */
1803 strptr_i = &addstr_i;
1806 strptr_i = &remstr_i;
1809 /* deal with clients... */
1810 if (MB_TYPE(mbuf, i) & (MODE_CHANOP | MODE_VOICE))
1811 build_string(strptr, strptr_i, cli_name(MB_CLIENT(mbuf, i)), 0, ' ');
1813 /* deal with bans... */
1814 else if (MB_TYPE(mbuf, i) & (MODE_BAN | MODE_EXCEPTION))
1815 build_string(strptr, strptr_i, MB_STRING(mbuf, i), 0, ' ');
1817 /* deal with keys... */
1818 else if (MB_TYPE(mbuf, i) & MODE_KEY)
1819 build_string(strptr, strptr_i, mbuf->mb_dest & MODEBUF_DEST_NOKEY ?
1820 "*" : MB_STRING(mbuf, i), 0, ' ');
1822 /* deal with invisible passwords */
1823 else if (MB_TYPE(mbuf, i) & (MODE_APASS | MODE_UPASS))
1824 build_string(strptr, strptr_i, "*", 0, ' ');
1827 * deal with limit; note we cannot include the limit parameter if we're
1830 else if ((MB_TYPE(mbuf, i) & (MODE_ADD | MODE_LIMIT)) ==
1831 (MODE_ADD | MODE_LIMIT))
1832 build_string(strptr, strptr_i, limitbuf, 0, ' ');
1833 else if ((MB_TYPE(mbuf, i) & (MODE_ADD | MODE_ACCESS)) ==
1834 (MODE_ADD | MODE_ACCESS))
1835 build_string(strptr, strptr_i, accessbuf, 0, ' ');
1837 else if (MB_TYPE(mbuf, i) & MODE_ALTCHAN)
1838 build_string(strptr, strptr_i, MB_STRING(mbuf, i), 0, ' ');
1839 else if ((MB_TYPE(mbuf, i) & (MODE_ADD | MODE_NOFLOOD)) ==
1840 (MODE_ADD | MODE_NOFLOOD))
1841 build_string(strptr, strptr_i, MB_STRING(mbuf, i), 0, ' ');
1844 /* send the messages off to their destination */
1845 if (mbuf->mb_dest & MODEBUF_DEST_HACK2)
1846 sendto_opmask_butone(0, SNO_HACK2, "HACK(2): %s MODE %s %s%s%s%s%s%s "
1848 cli_name(feature_bool(FEAT_HIS_SNOTICES) ?
1849 mbuf->mb_source : app_source),
1850 mbuf->mb_channel->chname,
1851 rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
1852 addbuf, remstr, addstr,
1853 mbuf->mb_channel->creationtime);
1855 if (mbuf->mb_dest & MODEBUF_DEST_HACK3)
1856 sendto_opmask_butone(0, SNO_HACK3, "BOUNCE or HACK(3): %s MODE %s "
1857 "%s%s%s%s%s%s [%Tu]",
1858 cli_name(feature_bool(FEAT_HIS_SNOTICES) ?
1859 mbuf->mb_source : app_source),
1860 mbuf->mb_channel->chname, rembuf_i ? "-" : "",
1861 rembuf, addbuf_i ? "+" : "", addbuf, remstr, addstr,
1862 mbuf->mb_channel->creationtime);
1864 if (mbuf->mb_dest & MODEBUF_DEST_HACK4)
1865 sendto_opmask_butone(0, SNO_HACK4, "HACK(4): %s MODE %s %s%s%s%s%s%s "
1867 cli_name(feature_bool(FEAT_HIS_SNOTICES) ?
1868 mbuf->mb_source : app_source),
1869 mbuf->mb_channel->chname,
1870 rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
1871 addbuf, remstr, addstr,
1872 mbuf->mb_channel->creationtime);
1874 if (mbuf->mb_dest & MODEBUF_DEST_LOG)
1875 log_write(LS_OPERMODE, L_INFO, LOG_NOSNOTICE,
1876 "%#C OPMODE %H %s%s%s%s%s%s", mbuf->mb_source,
1877 mbuf->mb_channel, rembuf_i ? "-" : "", rembuf,
1878 addbuf_i ? "+" : "", addbuf, remstr, addstr);
1880 if (mbuf->mb_dest & MODEBUF_DEST_CHANNEL)
1881 sendcmdto_channel_butserv_butone(app_source, CMD_MODE, mbuf->mb_channel, NULL, 0,
1882 "%H %s%s%s%s%s%s%s%s", mbuf->mb_channel,
1883 rembuf_i || rembuf_local_i ? "-" : "",
1884 rembuf, rembuf_local,
1885 addbuf_i || addbuf_local_i ? "+" : "",
1886 addbuf, addbuf_local,
1890 /* Now are we supposed to propagate to other servers? */
1891 if (mbuf->mb_dest & MODEBUF_DEST_SERVER) {
1892 /* set up parameter string */
1899 * limit is supressed if we're removing it; we have to figure out which
1900 * direction is the direction for it to be removed, though...
1902 limitdel |= (mbuf->mb_dest & MODEBUF_DEST_BOUNCE) ? MODE_DEL : MODE_ADD;
1903 accessdel |= (mbuf->mb_dest & MODEBUF_DEST_BOUNCE) ? MODE_DEL : MODE_ADD;
1905 for (i = 0; i < mbuf->mb_count; i++) {
1906 if (MB_TYPE(mbuf, i) & MODE_SAVE)
1909 if (MB_TYPE(mbuf, i) & MODE_ADD) { /* adding or removing? */
1911 strptr_i = &addstr_i;
1914 strptr_i = &remstr_i;
1917 /* if we're changing oplevels and we know the oplevel, pass it on */
1918 if ((MB_TYPE(mbuf, i) & MODE_CHANOP)
1919 && MB_OPLEVEL(mbuf, i) < MAXOPLEVEL)
1920 *strptr_i += ircd_snprintf(0, strptr + *strptr_i, BUFSIZE - *strptr_i,
1922 NumNick(MB_CLIENT(mbuf, i)),
1923 MB_OPLEVEL(mbuf, i));
1925 /* deal with other modes that take clients */
1926 else if (MB_TYPE(mbuf, i) & (MODE_CHANOP | MODE_VOICE))
1927 build_string(strptr, strptr_i, NumNick(MB_CLIENT(mbuf, i)), ' ');
1929 /* deal with modes that take strings */
1930 else if (MB_TYPE(mbuf, i) & (MODE_KEY | MODE_BAN | MODE_EXCEPTION | MODE_APASS | MODE_UPASS | MODE_ALTCHAN | MODE_NOFLOOD))
1931 build_string(strptr, strptr_i, MB_STRING(mbuf, i), 0, ' ');
1934 * deal with the limit. Logic here is complicated; if HACK2 is set,
1935 * we're bouncing the mode, so sense is reversed, and we have to
1936 * include the original limit if it looks like it's being removed
1938 else if ((MB_TYPE(mbuf, i) & limitdel) == limitdel)
1939 build_string(strptr, strptr_i, limitbuf, 0, ' ');
1940 else if ((MB_TYPE(mbuf, i) & accessdel) == accessdel)
1941 build_string(strptr, strptr_i, accessbuf, 0, ' ');
1944 /* we were told to deop the source */
1945 if (mbuf->mb_dest & MODEBUF_DEST_DEOP) {
1946 addbuf[addbuf_i++] = 'o'; /* remember, sense is reversed */
1947 addbuf[addbuf_i] = '\0'; /* terminate the string... */
1948 build_string(addstr, &addstr_i, NumNick(mbuf->mb_source), ' ');
1950 /* mark that we've done this, so we don't do it again */
1951 mbuf->mb_dest &= ~MODEBUF_DEST_DEOP;
1954 if (mbuf->mb_dest & MODEBUF_DEST_OPMODE) {
1955 /* If OPMODE was set, we're propagating the mode as an OPMODE message */
1956 sendcmdto_serv_butone(mbuf->mb_source, CMD_OPMODE, mbuf->mb_connect,
1957 "%H %s%s%s%s%s%s", mbuf->mb_channel,
1958 rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
1959 addbuf, remstr, addstr);
1960 } else if (mbuf->mb_dest & MODEBUF_DEST_BOUNCE) {
1962 * If HACK2 was set, we're bouncing; we send the MODE back to
1963 * the connection we got it from with the senses reversed and
1964 * the proper TS; origin is us
1966 sendcmdto_one(&me, CMD_MODE, mbuf->mb_connect, "%H %s%s%s%s%s%s %Tu",
1967 mbuf->mb_channel, addbuf_i ? "-" : "", addbuf,
1968 rembuf_i ? "+" : "", rembuf, addstr, remstr,
1969 mbuf->mb_channel->creationtime);
1972 * We're propagating a normal (or HACK3 or HACK4) MODE command
1973 * to the rest of the network. We send the actual channel TS.
1975 sendcmdto_serv_butone(mbuf->mb_source, CMD_MODE, mbuf->mb_connect,
1976 "%H %s%s%s%s%s%s %Tu", mbuf->mb_channel,
1977 rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
1978 addbuf, remstr, addstr,
1979 mbuf->mb_channel->creationtime);
1983 /* We've drained the ModeBuf... */
1988 /* reinitialize the mode-with-arg slots */
1989 for (i = 0; i < MAXMODEPARAMS; i++) {
1990 /* If we saved any, pack them down */
1991 if (MB_TYPE(mbuf, i) & MODE_SAVE) {
1992 mbuf->mb_modeargs[mbuf->mb_count] = mbuf->mb_modeargs[i];
1993 MB_TYPE(mbuf, mbuf->mb_count) &= ~MODE_SAVE; /* don't save anymore */
1995 if (mbuf->mb_count++ == i) /* don't overwrite our hard work */
1997 } else if (MB_TYPE(mbuf, i) & MODE_FREE)
1998 MyFree(MB_STRING(mbuf, i)); /* free string if needed */
2000 MB_TYPE(mbuf, i) = 0;
2001 MB_UINT(mbuf, i) = 0;
2004 /* If we're supposed to flush it all, do so--all hail tail recursion */
2005 if (all && mbuf->mb_count)
2006 return modebuf_flush_int(mbuf, 1);
2011 /** Initialise a modebuf
2012 * This routine just initializes a ModeBuf structure with the information
2013 * needed and the options given.
2015 * @param mbuf The mode buffer to initialise.
2016 * @param source The client that is performing the mode.
2018 * @param chan The channel that the mode is being performed upon.
2022 modebuf_init(struct ModeBuf *mbuf, struct Client *source,
2023 struct Client *connect, struct Channel *chan, unsigned int dest)
2028 assert(0 != source);
2032 if (IsLocalChannel(chan->chname)) dest &= ~MODEBUF_DEST_SERVER;
2036 mbuf->mb_source = source;
2037 mbuf->mb_connect = connect;
2038 mbuf->mb_channel = chan;
2039 mbuf->mb_dest = dest;
2042 /* clear each mode-with-parameter slot */
2043 for (i = 0; i < MAXMODEPARAMS; i++) {
2044 MB_TYPE(mbuf, i) = 0;
2045 MB_UINT(mbuf, i) = 0;
2049 /** Append a new mode to a modebuf
2050 * This routine simply adds modes to be added or deleted; do a binary OR
2051 * with either MODE_ADD or MODE_DEL
2053 * @param mbuf Mode buffer
2054 * @param mode MODE_ADD or MODE_DEL OR'd with MODE_PRIVATE etc.
2057 modebuf_mode(struct ModeBuf *mbuf, ulong64 mode)
2060 assert(0 != (mode & (MODE_ADD | MODE_DEL)));
2062 mode &= (MODE_ADD | MODE_DEL | MODE_PRIVATE | MODE_SECRET | MODE_MODERATED |
2063 MODE_TOPICLIMIT | MODE_INVITEONLY | MODE_NOPRIVMSGS | MODE_REGONLY |
2064 MODE_DELJOINS | MODE_WASDELJOINS | MODE_REGISTERED | MODE_PERSIST |
2065 MODE_NOCOLOUR | MODE_NOCTCP | MODE_NOAMSGS | MODE_NONOTICE |
2066 MODE_QUARANTINE | MODE_AUDITORIUM);
2068 if (!(mode & ~(MODE_ADD | MODE_DEL))) /* don't add empty modes... */
2071 if (mode & MODE_ADD) {
2072 mbuf->mb_rem &= ~mode;
2073 mbuf->mb_add |= mode;
2075 mbuf->mb_add &= ~mode;
2076 mbuf->mb_rem |= mode;
2080 /** Append a mode that takes an ulong64 argument to the modebuf
2082 * This routine adds a mode to be added or deleted that takes a unsigned
2083 * ulong64 parameter; mode may *only* be the relevant mode flag ORed with one
2084 * of MODE_ADD or MODE_DEL
2086 * @param mbuf The mode buffer to append to.
2087 * @param mode The mode to append.
2088 * @param uint The argument to the mode.
2091 modebuf_mode_uint(struct ModeBuf *mbuf, ulong64 mode, unsigned int uint)
2094 assert(0 != (mode & (MODE_ADD | MODE_DEL)));
2096 if (mode == (MODE_LIMIT | MODE_DEL)) {
2097 mbuf->mb_rem |= mode;
2100 if (mode == (MODE_ACCESS | MODE_DEL)) {
2101 mbuf->mb_rem |= mode;
2104 MB_TYPE(mbuf, mbuf->mb_count) = mode;
2105 MB_UINT(mbuf, mbuf->mb_count) = uint;
2107 /* when we've reached the maximal count, flush the buffer */
2108 if (++mbuf->mb_count >=
2109 (MAXMODEPARAMS - (mbuf->mb_dest & MODEBUF_DEST_DEOP ? 1 : 0)))
2110 modebuf_flush_int(mbuf, 0);
2113 /** append a string mode
2114 * This routine adds a mode to be added or deleted that takes a string
2115 * parameter; mode may *only* be the relevant mode flag ORed with one of
2116 * MODE_ADD or MODE_DEL
2118 * @param mbuf The mode buffer to append to.
2119 * @param mode The mode to append.
2120 * @param string The string parameter to append.
2121 * @param free If the string should be free'd later.
2124 modebuf_mode_string(struct ModeBuf *mbuf, ulong64 mode, char *string,
2128 assert(0 != (mode & (MODE_ADD | MODE_DEL)));
2130 MB_TYPE(mbuf, mbuf->mb_count) = mode | (free ? MODE_FREE : 0);
2131 MB_STRING(mbuf, mbuf->mb_count) = string;
2133 /* when we've reached the maximal count, flush the buffer */
2134 if (++mbuf->mb_count >=
2135 (MAXMODEPARAMS - (mbuf->mb_dest & MODEBUF_DEST_DEOP ? 1 : 0)))
2136 modebuf_flush_int(mbuf, 0);
2139 /** Append a mode on a client to a modebuf.
2140 * This routine adds a mode to be added or deleted that takes a client
2141 * parameter; mode may *only* be the relevant mode flag ORed with one of
2142 * MODE_ADD or MODE_DEL
2144 * @param mbuf The modebuf to append the mode to.
2145 * @param mode The mode to append.
2146 * @param client The client argument to append.
2147 * @param oplevel The oplevel the user had or will have
2150 modebuf_mode_client(struct ModeBuf *mbuf, ulong64 mode,
2151 struct Client *client, int oplevel)
2154 assert(0 != (mode & (MODE_ADD | MODE_DEL)));
2156 MB_TYPE(mbuf, mbuf->mb_count) = mode;
2157 MB_CLIENT(mbuf, mbuf->mb_count) = client;
2158 MB_OPLEVEL(mbuf, mbuf->mb_count) = oplevel;
2160 /* when we've reached the maximal count, flush the buffer */
2161 if (++mbuf->mb_count >=
2162 (MAXMODEPARAMS - (mbuf->mb_dest & MODEBUF_DEST_DEOP ? 1 : 0)))
2163 modebuf_flush_int(mbuf, 0);
2166 /** Check a channel for join-delayed members.
2167 * @param[in] chan Channel to search.
2168 * @return Non-zero if any members are join-delayed; false if none are.
2171 find_delayed_joins(const struct Channel *chan)
2173 const struct Membership *memb;
2174 for (memb = chan->members; memb; memb = memb->next_member)
2175 if (IsDelayedJoin(memb) && !IsInvisibleJoin(memb))
2180 /** The exported binding for modebuf_flush()
2182 * @param mbuf The mode buffer to flush.
2184 * @see modebuf_flush_int()
2187 modebuf_flush(struct ModeBuf *mbuf)
2189 /* Check if MODE_WASDELJOINS should be set: */
2190 /* Must be set if going -D and some clients are hidden */
2191 if ((mbuf->mb_rem & MODE_DELJOINS)
2192 && !(mbuf->mb_channel->mode.mode & (MODE_DELJOINS | MODE_WASDELJOINS))
2193 && find_delayed_joins(mbuf->mb_channel)) {
2194 mbuf->mb_channel->mode.mode |= MODE_WASDELJOINS;
2195 mbuf->mb_add |= MODE_WASDELJOINS;
2196 mbuf->mb_rem &= ~MODE_WASDELJOINS;
2198 /* Must be cleared if +D is set */
2199 if ((mbuf->mb_add & MODE_DELJOINS)
2200 && ((mbuf->mb_channel->mode.mode & (MODE_WASDELJOINS | MODE_WASDELJOINS))
2201 == (MODE_WASDELJOINS | MODE_WASDELJOINS))) {
2202 mbuf->mb_channel->mode.mode &= ~MODE_WASDELJOINS;
2203 mbuf->mb_add &= ~MODE_WASDELJOINS;
2204 mbuf->mb_rem |= MODE_WASDELJOINS;
2207 return modebuf_flush_int(mbuf, 1);
2210 /* This extracts the simple modes contained in mbuf
2212 * @param mbuf The mode buffer to extract the modes from.
2213 * @param buf The string buffer to write the modes into.
2216 modebuf_extract(struct ModeBuf *mbuf, char *buf)
2218 static ulong64 flags[] = {
2219 /* MODE_CHANOP, 'o', */
2220 /* MODE_VOICE, 'v', */
2223 MODE_MODERATED, 'm',
2224 MODE_TOPICLIMIT, 't',
2225 MODE_INVITEONLY, 'i',
2226 MODE_NOPRIVMSGS, 'n',
2230 MODE_REGISTERED, 'R',
2231 /* MODE_BAN, 'b', */
2238 /* MODE_EXCEPTION, 'e', */
2241 MODE_QUARANTINE, 'Q',
2244 MODE_AUDITORIUM, 'u',
2249 int i, bufpos = 0, len;
2251 char *key = 0, limitbuf[20], accessbuf[20];
2252 char *apass = 0, *upass = 0, *altchan = 0, *noflood = 0;
2261 for (i = 0; i < mbuf->mb_count; i++) { /* find keys and limits */
2262 if (MB_TYPE(mbuf, i) & MODE_ADD) {
2263 add |= MB_TYPE(mbuf, i) & (MODE_KEY | MODE_LIMIT | MODE_APASS | MODE_UPASS | MODE_ALTCHAN | MODE_ACCESS | MODE_NOFLOOD);
2265 if (MB_TYPE(mbuf, i) & MODE_KEY) /* keep strings */
2266 key = MB_STRING(mbuf, i);
2267 else if (MB_TYPE(mbuf, i) & MODE_LIMIT)
2268 ircd_snprintf(0, limitbuf, sizeof(limitbuf), "%u", MB_UINT(mbuf, i));
2269 else if (MB_TYPE(mbuf, i) & MODE_ACCESS)
2270 ircd_snprintf(0, accessbuf, sizeof(accessbuf), "%u", MB_UINT(mbuf, i));
2271 else if (MB_TYPE(mbuf, i) & MODE_UPASS)
2272 upass = MB_STRING(mbuf, i);
2273 else if (MB_TYPE(mbuf, i) & MODE_APASS)
2274 apass = MB_STRING(mbuf, i);
2275 else if (MB_TYPE(mbuf, i) & MODE_ALTCHAN)
2276 altchan = MB_STRING(mbuf, i);
2277 else if (MB_TYPE(mbuf, i) & MODE_NOFLOOD)
2278 noflood = MB_STRING(mbuf, i);
2285 buf[bufpos++] = '+'; /* start building buffer */
2287 for (flag_p = flags; flag_p[0]; flag_p += 2)
2289 buf[bufpos++] = flag_p[1];
2291 for (i = 0, len = bufpos; i < len; i++) {
2293 build_string(buf, &bufpos, key, 0, ' ');
2294 else if (buf[i] == 'l')
2295 build_string(buf, &bufpos, limitbuf, 0, ' ');
2296 else if (buf[i] == 'a')
2297 build_string(buf, &bufpos, accessbuf, 0, ' ');
2298 else if (buf[i] == 'U')
2299 build_string(buf, &bufpos, upass, 0, ' ');
2300 else if (buf[i] == 'A')
2301 build_string(buf, &bufpos, apass, 0, ' ');
2302 else if (buf[i] == 'F')
2303 build_string(buf, &bufpos, altchan, 0, ' ');
2304 else if (buf[i] == 'f')
2305 build_string(buf, &bufpos, noflood, 0, ' ');
2313 /** Simple function to invalidate a channel's ban cache.
2315 * This function marks all members of the channel as being neither
2316 * banned nor banned.
2318 * @param chan The channel to operate on.
2321 mode_ban_invalidate(struct Channel *chan)
2323 struct Membership *member;
2325 for (member = chan->members; member; member = member->next_member)
2326 ClearBanValid(member);
2329 /** Simple function to drop invite structures
2331 * Remove all the invites on the channel.
2333 * @param chan Channel to remove invites from.
2337 mode_invite_clear(struct Channel *chan)
2339 while (chan->invites)
2340 del_invite(chan->invites->value.cptr, chan);
2343 /* What we've done for mode_parse so far... */
2344 #define DONE_LIMIT 0x01 /**< We've set the limit */
2345 #define DONE_KEY_ADD 0x02 /**< We've set the key */
2346 #define DONE_BANLIST 0x04 /**< We've sent the ban list */
2347 #define DONE_NOTOPER 0x08 /**< We've sent a "Not oper" error */
2348 #define DONE_BANCLEAN 0x10 /**< We've cleaned bans... */
2349 #define DONE_UPASS_ADD 0x20 /**< We've set user pass */
2350 #define DONE_APASS_ADD 0x40 /**< We've set admin pass */
2351 #define DONE_KEY_DEL 0x80 /**< We've removed the key */
2352 #define DONE_UPASS_DEL 0x100 /**< We've removed the user pass */
2353 #define DONE_APASS_DEL 0x200 /**< We've removed the admin pass */
2354 #define DONE_EXCEPTIONLIST 0x400 /**< We've sent the exception list */
2355 #define DONE_ALTCHAN 0x800 /**< We've set the altchan */
2356 #define DONE_ACCESS 0x1000 /**< We've set the access */
2357 #define DONE_NOFLOOD 0x2000 /**< We've set the noflood options */
2360 struct ModeBuf *mbuf;
2361 struct Client *cptr;
2362 struct Client *sptr;
2363 struct Channel *chptr;
2364 struct Membership *member;
2375 struct Ban banlist[MAXPARA];
2378 unsigned short oplevel;
2379 struct Client *client;
2380 } cli_change[MAXPARA];
2383 /** Helper function to send "Not oper" or "Not member" messages
2384 * Here's a helper function to deal with sending along "Not oper" or
2385 * "Not member" messages
2387 * @param state Parsing State object
2390 send_notoper(struct ParseState *state)
2392 if (state->done & DONE_NOTOPER)
2395 send_reply(state->sptr, (state->flags & MODE_PARSE_NOTOPER) ?
2396 ERR_CHANOPRIVSNEEDED : ERR_NOTONCHANNEL, state->chptr->chname);
2398 state->done |= DONE_NOTOPER;
2402 * Helper function to convert limits
2404 * @param state Parsing state object.
2408 mode_parse_limit(struct ParseState *state, ulong64 *flag_p)
2410 unsigned int t_limit;
2412 if (state->dir == MODE_ADD) { /* convert arg only if adding limit */
2413 if (MyUser(state->sptr) && state->max_args <= 0) /* too many args? */
2416 if (state->parc <= 0) { /* warn if not enough args */
2417 if (MyUser(state->sptr))
2418 need_more_params(state->sptr, "MODE +l");
2422 t_limit = strtoul(state->parv[state->args_used++], 0, 10); /* grab arg */
2426 if ((int)t_limit<0) /* don't permit a negative limit */
2429 if (!(state->flags & MODE_PARSE_WIPEOUT) &&
2430 (!t_limit || t_limit == state->chptr->mode.limit))
2433 t_limit = state->chptr->mode.limit;
2435 /* If they're not an oper, they can't change modes */
2436 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2437 send_notoper(state);
2441 /* Can't remove a limit that's not there */
2442 if (state->dir == MODE_DEL && !state->chptr->mode.limit)
2445 /* Skip if this is a burst and a lower limit than this is set already */
2446 if ((state->flags & MODE_PARSE_BURST) &&
2447 (state->chptr->mode.mode & flag_p[0]) &&
2448 (state->chptr->mode.limit < t_limit))
2451 if (state->done & DONE_LIMIT) /* allow limit to be set only once */
2453 state->done |= DONE_LIMIT;
2458 modebuf_mode_uint(state->mbuf, state->dir | flag_p[0], t_limit);
2460 if (state->flags & MODE_PARSE_SET) { /* set the limit */
2461 if (state->dir & MODE_ADD) {
2462 state->chptr->mode.mode |= flag_p[0];
2463 state->chptr->mode.limit = t_limit;
2465 state->chptr->mode.mode &= ~flag_p[0];
2466 state->chptr->mode.limit = 0;
2473 mode_parse_access(struct ParseState *state, ulong64 *flag_p)
2475 unsigned int t_access;
2477 if (state->dir == MODE_ADD) { /* convert arg only if adding access */
2478 if (MyUser(state->sptr) && state->max_args <= 0) /* too many args? */
2481 if (state->parc <= 0) { /* warn if not enough args */
2482 if (MyUser(state->sptr))
2483 need_more_params(state->sptr, "MODE +a");
2487 t_access = strtoul(state->parv[state->args_used++], 0, 10); /* grab arg */
2491 if ((int)t_access<1 || (int)t_access>500) /* don't permit a negative access or an access over 500 */
2494 if (!feature_bool(FEAT_CHMODE_A_ENABLE)) { /* don't parse MODE_ACCESS if it's disabled */
2495 if (MyUser(state->sptr)) {
2497 send_reply(state->sptr, ERR_UNKNOWNMODE, mode[0]);
2502 if (!(state->flags & MODE_PARSE_WIPEOUT) &&
2503 (!t_access || t_access == state->chptr->mode.access))
2506 t_access = state->chptr->mode.access;
2508 /* If they're not an oper, they can't change modes */
2509 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2510 send_notoper(state);
2514 /* Can't remove an access that's not there */
2515 if (state->dir == MODE_DEL && !state->chptr->mode.access)
2518 /* Skip if this is a burst and a higher access than this is set already */
2519 if ((state->flags & MODE_PARSE_BURST) &&
2520 (state->chptr->mode.mode & flag_p[0]) &&
2521 (state->chptr->mode.access > t_access))
2524 if (state->done & DONE_ACCESS) /* allow access to be set only once */
2526 state->done |= DONE_ACCESS;
2531 modebuf_mode_uint(state->mbuf, state->dir | flag_p[0], t_access);
2533 if (state->flags & MODE_PARSE_SET) { /* set the access */
2534 if (state->dir & MODE_ADD) {
2535 state->chptr->mode.mode |= flag_p[0];
2536 state->chptr->mode.access = t_access;
2538 state->chptr->mode.mode &= ~flag_p[0];
2539 state->chptr->mode.access = 0;
2546 mode_parse_altchan(struct ParseState *state, ulong64 *flag_p)
2550 if (state->dir == MODE_ADD) { /* convert arg only if adding altchan */
2551 if (MyUser(state->sptr) && state->max_args <= 0) /* too many args? */
2554 if (!feature_bool(FEAT_CHMODE_F_ENABLE))
2557 if (state->parc <= 0) { /* warn if not enough args */
2558 if (MyUser(state->sptr))
2559 need_more_params(state->sptr, "MODE +F");
2563 t_str = state->parv[state->args_used++]; /* grab arg */
2567 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! */
2570 struct Channel *chptr;
2571 struct Membership *member;
2572 if (!(chptr = FindChannel(t_str)))
2574 if(!(member = find_member_link(chptr, state->sptr)))
2576 if(!IsChanOp(member)) {
2577 send_notoper(state);
2581 if (!(state->flags & MODE_PARSE_WIPEOUT) &&
2582 (!t_str || t_str == state->chptr->mode.altchan))
2585 t_str = state->chptr->mode.altchan;
2587 /* If they're not an oper, they can't change modes */
2588 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2589 send_notoper(state);
2593 /* Can't remove a altchan that's not there */
2594 if (state->dir == MODE_DEL && !*state->chptr->mode.altchan)
2597 /* Skip if this is a burst and a lower altchan than this is set already */
2598 if ((state->flags & MODE_PARSE_BURST) &&
2599 *(state->chptr->mode.altchan))
2602 if (state->done & DONE_ALTCHAN) /* allow altchan to be set only once */
2604 state->done |= DONE_ALTCHAN;
2609 if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
2610 !ircd_strcmp(state->chptr->mode.altchan, t_str))
2611 return; /* no change */
2613 if (state->flags & MODE_PARSE_BOUNCE) {
2614 if (*state->chptr->mode.altchan) /* reset old altchan */
2615 modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0], state->chptr->mode.altchan, 0);
2616 else /* remove new bogus altchan */
2617 modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
2618 } else /* send new altchan */
2619 modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
2621 if (state->flags & MODE_PARSE_SET) {
2622 if (state->dir == MODE_DEL) /* remove the old altchan */
2623 *state->chptr->mode.altchan = '\0';
2625 ircd_strncpy(state->chptr->mode.altchan, t_str, CHANNELLEN);
2630 mode_parse_noflood(struct ParseState *state, ulong64 *flag_p)
2634 unsigned int count = 0, time = 0, flags = 0;
2636 if (state->dir == MODE_ADD) { /* convert arg only if adding noflood */
2637 if (MyUser(state->sptr) && state->max_args <= 0) /* too many args? */
2640 if (state->parc <= 0) { /* warn if not enough args */
2641 if (MyUser(state->sptr))
2642 need_more_params(state->sptr, "MODE +f");
2646 t_str = state->parv[state->args_used++]; /* grab arg */
2653 if(state->flags & MODE_PARSE_FORCE) flags |= FLFL_NOFLOOD;
2654 else t_str++; //simply ignore if it's not an opmode
2657 if(tmp[0] == '+' || tmp[0] == '@') {
2658 if(tmp[0] == '+') flags |= FLFL_VOICE;
2659 if(tmp[0] == '@') flags |= FLFL_CHANOP;
2663 for(p = tmp; p[0]; p++) {
2665 char tmpchar = p[0];
2667 count = strtoul(tmp,0,10);
2670 time = strtoul(p,0,10);
2674 if(count <= 0 || time <= 0 || count > 100 || time > 600) return;
2676 if (!(state->flags & MODE_PARSE_WIPEOUT) &&
2677 (!t_str || t_str == state->chptr->mode.noflood))
2680 t_str = state->chptr->mode.noflood;
2682 /* If they're not an oper, they can't change modes */
2683 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2684 send_notoper(state);
2688 /* Can't remove a noflood that's not there */
2689 if (state->dir == MODE_DEL && !*state->chptr->mode.noflood)
2692 /* Skip if this is a burst and a lower noflood than this is set already */
2693 if ((state->flags & MODE_PARSE_BURST) &&
2694 *(state->chptr->mode.noflood))
2697 if (state->done & DONE_NOFLOOD) /* allow noflood to be set only once */
2699 state->done |= DONE_NOFLOOD;
2704 if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
2705 !ircd_strcmp(state->chptr->mode.noflood, t_str))
2706 return; /* no change */
2708 if (state->flags & MODE_PARSE_BOUNCE) {
2709 if (*state->chptr->mode.noflood) /* reset old noflood */
2710 modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0], state->chptr->mode.noflood, 0);
2711 else /* remove new bogus noflood */
2712 modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
2713 } else /* send new noflood */
2714 modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
2716 if (state->flags & MODE_PARSE_SET) {
2717 if (state->dir == MODE_DEL) /* remove the old noflood */
2718 *state->chptr->mode.noflood = '\0';
2720 ircd_strncpy(state->chptr->mode.noflood, t_str, CHANNELLEN);
2723 if (state->dir == MODE_ADD) {
2724 unsigned int noflood_value = time;
2725 noflood_value <<= 10;
2726 noflood_value |= count;
2727 noflood_value <<= 3;
2728 noflood_value |= flags;
2729 state->chptr->mode.noflood_value = noflood_value;
2731 //removed the mode so free all flood objects
2732 struct Membership *member;
2733 for(member = state->chptr->members; member; member = member->next_member) {
2734 struct MemberFlood *floodnode;
2735 for(floodnode = member->flood;floodnode ; floodnode = floodnode->next_memberflood) {
2736 if(floodnode->next_memberflood == NULL) break;
2737 } //simply walk to the end
2738 if(!floodnode) continue;
2739 floodnode->next_memberflood = free_MemberFlood;
2740 free_MemberFlood = floodnode;
2741 member->flood = NULL;
2747 mode_parse_quarantine(struct ParseState *state, ulong64 *flag_p)
2752 /** Helper function to validate key-like parameters.
2754 * @param[in] state Parse state for feedback to user.
2755 * @param[in] s Key to validate.
2756 * @param[in] command String to pass for need_more_params() command.
2757 * @return Zero on an invalid key, non-zero if the key was okay.
2760 is_clean_key(struct ParseState *state, char *s, char *command)
2765 if (MyUser(state->sptr))
2766 need_more_params(state->sptr, command);
2769 else if (s[0] == ':') {
2770 if (MyUser(state->sptr))
2771 send_reply(state->sptr, ERR_INVALIDKEY, state->chptr->chname);
2774 for (ii = 0; (ii <= KEYLEN) && (s[ii] != '\0'); ++ii) {
2775 if ((unsigned char)s[ii] <= ' ' || s[ii] == ',') {
2776 if (MyUser(state->sptr))
2777 send_reply(state->sptr, ERR_INVALIDKEY, state->chptr->chname);
2782 if (MyUser(state->sptr))
2783 send_reply(state->sptr, ERR_INVALIDKEY, state->chptr->chname);
2790 * Helper function to convert keys
2793 mode_parse_key(struct ParseState *state, ulong64 *flag_p)
2797 if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
2800 if (state->parc <= 0) { /* warn if not enough args */
2801 if (MyUser(state->sptr))
2802 need_more_params(state->sptr, state->dir == MODE_ADD ? "MODE +k" :
2807 t_str = state->parv[state->args_used++]; /* grab arg */
2811 /* If they're not an oper, they can't change modes */
2812 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2813 send_notoper(state);
2817 /* allow removing and then adding key, but not adding and then removing */
2818 if (state->dir == MODE_ADD)
2820 if (state->done & DONE_KEY_ADD)
2822 state->done |= DONE_KEY_ADD;
2826 if (state->done & (DONE_KEY_ADD | DONE_KEY_DEL))
2828 state->done |= DONE_KEY_DEL;
2831 /* If the key is invalid, tell the user and bail. */
2832 if (!is_clean_key(state, t_str, state->dir == MODE_ADD ? "MODE +k" :
2839 /* Skip if this is a burst, we have a key already and the new key is
2840 * after the old one alphabetically */
2841 if ((state->flags & MODE_PARSE_BURST) &&
2842 *(state->chptr->mode.key) &&
2843 ircd_strcmp(state->chptr->mode.key, t_str) <= 0)
2846 /* can't add a key if one is set, nor can one remove the wrong key */
2847 if (!(state->flags & MODE_PARSE_FORCE))
2848 if ((state->dir == MODE_ADD && *state->chptr->mode.key) ||
2849 (state->dir == MODE_DEL &&
2850 ircd_strcmp(state->chptr->mode.key, t_str))) {
2851 send_reply(state->sptr, ERR_KEYSET, state->chptr->chname);
2855 if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
2856 !ircd_strcmp(state->chptr->mode.key, t_str))
2857 return; /* no key change */
2859 if (state->flags & MODE_PARSE_BOUNCE) {
2860 if (*state->chptr->mode.key) /* reset old key */
2861 modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0],
2862 state->chptr->mode.key, 0);
2863 else /* remove new bogus key */
2864 modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
2865 } else /* send new key */
2866 modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
2868 if (state->flags & MODE_PARSE_SET) {
2869 if (state->dir == MODE_DEL) /* remove the old key */
2870 *state->chptr->mode.key = '\0';
2872 ircd_strncpy(state->chptr->mode.key, t_str, KEYLEN);
2877 * Helper function to convert user passes
2880 mode_parse_upass(struct ParseState *state, ulong64 *flag_p)
2884 if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
2887 if (state->parc <= 0) { /* warn if not enough args */
2888 if (MyUser(state->sptr))
2889 need_more_params(state->sptr, state->dir == MODE_ADD ? "MODE +U" :
2894 t_str = state->parv[state->args_used++]; /* grab arg */
2898 /* If they're not an oper, they can't change modes */
2899 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
2900 send_notoper(state);
2904 /* If a non-service user is trying to force it, refuse. */
2905 if (state->flags & MODE_PARSE_FORCE && MyUser(state->sptr)
2906 && !HasPriv(state->sptr, PRIV_APASS_OPMODE)) {
2907 send_reply(state->sptr, ERR_NOTMANAGER, state->chptr->chname,
2908 state->chptr->chname);
2912 /* If they are not the channel manager, they are not allowed to change it */
2913 if (MyUser(state->sptr) && !(state->flags & MODE_PARSE_FORCE || IsChannelManager(state->member))) {
2914 if (*state->chptr->mode.apass) {
2915 send_reply(state->sptr, ERR_NOTMANAGER, state->chptr->chname,
2916 state->chptr->chname);
2918 send_reply(state->sptr, ERR_NOMANAGER, state->chptr->chname,
2919 (TStime() - state->chptr->creationtime < 172800) ?
2920 "approximately 4-5 minutes" : "approximately 48 hours");
2925 /* allow removing and then adding upass, but not adding and then removing */
2926 if (state->dir == MODE_ADD)
2928 if (state->done & DONE_UPASS_ADD)
2930 state->done |= DONE_UPASS_ADD;
2934 if (state->done & (DONE_UPASS_ADD | DONE_UPASS_DEL))
2936 state->done |= DONE_UPASS_DEL;
2939 /* If the Upass is invalid, tell the user and bail. */
2940 if (!is_clean_key(state, t_str, state->dir == MODE_ADD ? "MODE +U" :
2947 if (!(state->flags & MODE_PARSE_FORCE)) {
2948 /* can't add the upass while apass is not set */
2949 if (state->dir == MODE_ADD && !*state->chptr->mode.apass) {
2950 send_reply(state->sptr, ERR_UPASSNOTSET, state->chptr->chname, state->chptr->chname);
2953 /* cannot set a +U password that is the same as +A */
2954 if (state->dir == MODE_ADD && !ircd_strcmp(state->chptr->mode.apass, t_str)) {
2955 send_reply(state->sptr, ERR_UPASS_SAME_APASS, state->chptr->chname);
2958 /* can't add a upass if one is set, nor can one remove the wrong upass */
2959 if ((state->dir == MODE_ADD && *state->chptr->mode.upass) ||
2960 (state->dir == MODE_DEL &&
2961 ircd_strcmp(state->chptr->mode.upass, t_str))) {
2962 send_reply(state->sptr, ERR_KEYSET, state->chptr->chname);
2967 if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
2968 !ircd_strcmp(state->chptr->mode.upass, t_str))
2969 return; /* no upass change */
2971 /* Skip if this is a burst, we have a Upass already and the new Upass is
2972 * after the old one alphabetically */
2973 if ((state->flags & MODE_PARSE_BURST) &&
2974 *(state->chptr->mode.upass) &&
2975 ircd_strcmp(state->chptr->mode.upass, t_str) <= 0)
2978 if (state->flags & MODE_PARSE_BOUNCE) {
2979 if (*state->chptr->mode.upass) /* reset old upass */
2980 modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0],
2981 state->chptr->mode.upass, 0);
2982 else /* remove new bogus upass */
2983 modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
2984 } else /* send new upass */
2985 modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
2987 if (state->flags & MODE_PARSE_SET) {
2988 if (state->dir == MODE_DEL) /* remove the old upass */
2989 *state->chptr->mode.upass = '\0';
2991 ircd_strncpy(state->chptr->mode.upass, t_str, KEYLEN);
2996 * Helper function to convert admin passes
2999 mode_parse_apass(struct ParseState *state, ulong64 *flag_p)
3001 struct Membership *memb;
3004 if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
3007 if (state->parc <= 0) { /* warn if not enough args */
3008 if (MyUser(state->sptr))
3009 need_more_params(state->sptr, state->dir == MODE_ADD ? "MODE +A" :
3014 t_str = state->parv[state->args_used++]; /* grab arg */
3018 /* If they're not an oper, they can't change modes */
3019 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
3020 send_notoper(state);
3024 if (MyUser(state->sptr)) {
3025 if (state->flags & MODE_PARSE_FORCE) {
3026 /* If an unprivileged oper is trying to force it, refuse. */
3027 if (!HasPriv(state->sptr, PRIV_APASS_OPMODE)) {
3028 send_reply(state->sptr, ERR_NOTMANAGER, state->chptr->chname,
3029 state->chptr->chname);
3033 /* If they are not the channel manager, they are not allowed to change it. */
3034 if (!IsChannelManager(state->member)) {
3035 if (*state->chptr->mode.apass) {
3036 send_reply(state->sptr, ERR_NOTMANAGER, state->chptr->chname,
3037 state->chptr->chname);
3039 send_reply(state->sptr, ERR_NOMANAGER, state->chptr->chname,
3040 (TStime() - state->chptr->creationtime < 172800) ?
3041 "approximately 4-5 minutes" : "approximately 48 hours");
3045 /* Can't remove the Apass while Upass is still set. */
3046 if (state->dir == MODE_DEL && *state->chptr->mode.upass) {
3047 send_reply(state->sptr, ERR_UPASSSET, state->chptr->chname, state->chptr->chname);
3050 /* Can't add an Apass if one is set, nor can one remove the wrong Apass. */
3051 if ((state->dir == MODE_ADD && *state->chptr->mode.apass) ||
3052 (state->dir == MODE_DEL && ircd_strcmp(state->chptr->mode.apass, t_str))) {
3053 send_reply(state->sptr, ERR_KEYSET, state->chptr->chname);
3058 /* Forbid removing the Apass if the channel is older than 48 hours
3059 * unless an oper is doing it. */
3060 if (TStime() - state->chptr->creationtime >= 172800
3061 && state->dir == MODE_DEL
3062 && !IsAnOper(state->sptr)) {
3063 send_reply(state->sptr, ERR_CHANSECURED, state->chptr->chname);
3068 /* allow removing and then adding apass, but not adding and then removing */
3069 if (state->dir == MODE_ADD)
3071 if (state->done & DONE_APASS_ADD)
3073 state->done |= DONE_APASS_ADD;
3077 if (state->done & (DONE_APASS_ADD | DONE_APASS_DEL))
3079 state->done |= DONE_APASS_DEL;
3082 /* If the Apass is invalid, tell the user and bail. */
3083 if (!is_clean_key(state, t_str, state->dir == MODE_ADD ? "MODE +A" :
3090 if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
3091 !ircd_strcmp(state->chptr->mode.apass, t_str))
3092 return; /* no apass change */
3094 /* Skip if this is a burst, we have an Apass already and the new Apass is
3095 * after the old one alphabetically */
3096 if ((state->flags & MODE_PARSE_BURST) &&
3097 *(state->chptr->mode.apass) &&
3098 ircd_strcmp(state->chptr->mode.apass, t_str) <= 0)
3101 if (state->flags & MODE_PARSE_BOUNCE) {
3102 if (*state->chptr->mode.apass) /* reset old apass */
3103 modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0],
3104 state->chptr->mode.apass, 0);
3105 else /* remove new bogus apass */
3106 modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
3107 } else /* send new apass */
3108 modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
3110 if (state->flags & MODE_PARSE_SET) {
3111 if (state->dir == MODE_ADD) { /* set the new apass */
3112 /* Only accept the new apass if there is no current apass or
3113 * this is a BURST. */
3114 if (state->chptr->mode.apass[0] == '\0' ||
3115 (state->flags & MODE_PARSE_BURST))
3116 ircd_strncpy(state->chptr->mode.apass, t_str, KEYLEN);
3117 /* Make it VERY clear to the user that this is a one-time password */
3118 if (MyUser(state->sptr)) {
3119 send_reply(state->sptr, RPL_APASSWARN_SET, state->chptr->mode.apass);
3120 send_reply(state->sptr, RPL_APASSWARN_SECRET, state->chptr->chname,
3121 state->chptr->mode.apass);
3123 /* Give the channel manager level 0 ops.
3124 There should not be tested for IsChannelManager here because
3125 on the local server it is impossible to set the apass if one
3126 isn't a channel manager and remote servers might need to sync
3127 the oplevel here: when someone creates a channel (and becomes
3128 channel manager) during a net.break, and only sets the Apass
3129 after the net rejoined, they will have oplevel MAXOPLEVEL on
3130 all remote servers. */
3132 SetOpLevel(state->member, 0);
3133 } else { /* remove the old apass */
3134 *state->chptr->mode.apass = '\0';
3135 /* Clear Upass so that there is never a Upass set when a zannel is burst. */
3136 *state->chptr->mode.upass = '\0';
3137 if (MyUser(state->sptr))
3138 send_reply(state->sptr, RPL_APASSWARN_CLEAR);
3139 /* Revert everyone to MAXOPLEVEL. */
3140 for (memb = state->chptr->members; memb; memb = memb->next_member) {
3141 if (memb->status & MODE_CHANOP)
3142 SetOpLevel(memb, MAXOPLEVEL);
3148 /** Compare one ban's extent to another.
3149 * This works very similarly to mmatch() but it knows about CIDR masks
3150 * and ban exceptions. If both bans are CIDR-based, compare their
3151 * address bits; otherwise, use mmatch().
3152 * @param[in] old_ban One ban.
3153 * @param[in] new_ban Another ban.
3154 * @return Zero if \a old_ban is a superset of \a new_ban, non-zero otherwise.
3157 bmatch(struct Ban *old_ban, struct Ban *new_ban)
3160 assert(old_ban != NULL);
3161 assert(new_ban != NULL);
3162 /* A ban is never treated as a superset of an exception and vice versa. */
3163 if(((old_ban->flags & BAN_EXCEPTION) && !(new_ban->flags & BAN_EXCEPTION))
3164 || (!(old_ban->flags & BAN_EXCEPTION) && (new_ban->flags & BAN_EXCEPTION)))
3166 /* If either is not an address mask, match the text masks. */
3167 if ((old_ban->flags & new_ban->flags & BAN_IPMASK) == 0)
3168 return mmatch(old_ban->banstr, new_ban->banstr);
3169 /* If the old ban has a longer prefix than new, it cannot be a superset. */
3170 if (old_ban->addrbits > new_ban->addrbits)
3172 /* Compare the masks before the hostname part. */
3173 old_ban->banstr[old_ban->nu_len] = new_ban->banstr[new_ban->nu_len] = '\0';
3174 res = mmatch(old_ban->banstr, new_ban->banstr);
3175 old_ban->banstr[old_ban->nu_len] = new_ban->banstr[new_ban->nu_len] = '@';
3178 /* If the old ban's mask mismatches, cannot be a superset. */
3179 if (!ipmask_check(&new_ban->address, &old_ban->address, old_ban->addrbits))
3181 /* Otherwise it depends on whether the old ban's text is a superset
3183 return mmatch(old_ban->banstr, new_ban->banstr);
3186 /** Add a ban from a ban list and mark bans that should be removed
3187 * because they overlap.
3189 * There are three invariants for a ban list. First, no ban may be
3190 * more specific than another ban. Second, no exception may be more
3191 * specific than another exception. Finally, no ban may be more
3192 * specific than any exception.
3194 * @param[in,out] banlist Pointer to head of list.
3195 * @param[in] newban Ban (or exception) to add (or remove).
3196 * @param[in] do_free If non-zero, free \a newban on failure.
3197 * @return Zero if \a newban could be applied, non-zero if not.
3199 int apply_ban(struct Ban **banlist, struct Ban *newban, int do_free)
3204 assert(newban->flags & (BAN_ADD|BAN_DEL));
3205 if (newban->flags & BAN_ADD) {
3207 /* If a less specific *active* entry is found, fail. */
3208 for (ban = *banlist; ban; ban = ban->next) {
3209 if (!bmatch(ban, newban) && !(ban->flags & BAN_DEL)) {
3214 if (!(ban->flags & (BAN_OVERLAPPED|BAN_DEL))) {
3216 totlen += strlen(ban->banstr);
3219 /* Mark more specific entries and add this one to the end of the list. */
3220 while ((ban = *banlist) != NULL) {
3221 if (!bmatch(newban, ban)) {
3222 ban->flags |= BAN_OVERLAPPED | BAN_DEL;
3224 banlist = &ban->next;
3228 } else if (newban->flags & BAN_DEL) {
3229 size_t remove_count = 0;
3230 /* Mark more specific entries. */
3231 for (ban = *banlist; ban; ban = ban->next) {
3232 if (!bmatch(newban, ban)) {
3233 ban->flags |= BAN_OVERLAPPED | BAN_DEL;
3239 /* If no matches were found, fail. */
3249 /* Removes MODE_WASDELJOINS in a channel.
3250 * Reveals all hidden users.
3252 static void reveal_hidden_chan_users(struct ParseState *state, ulong64 *flag_p) {
3253 struct Membership *member;
3255 /* If the channel is not +d, do nothing. */
3256 if(!(state->chptr->mode.mode & MODE_WASDELJOINS)) return;
3258 /* Iterate through all members and reveal them if they are hidden. */
3259 for(member = state->chptr->members; member; member = member->next_member) {
3260 if(IsDelayedJoin(member) && !IsInvisibleJoin(member)) {
3261 RevealDelayedJoin(member);
3266 /* Handle MODE_AUDITORIUM changes
3267 * set Delayed for all hidden users on MODE_DEL
3268 * part all nonoped users on MODE_ADD
3270 static void audit_chan_users(struct ParseState *state, ulong64 *flag_p) {
3271 struct Membership *member;
3272 if (state->dir == MODE_ADD) {
3273 for(member = state->chptr->members; member; member = member->next_member) {
3274 if(!IsChanOp(member) && !HasVoice(member)) {
3275 sendcmdto_channel_butserv_butone(member->user, CMD_PART, member->channel, member->user, SKIP_OPS, "%H :%s", member->channel, "mode +u set.");
3279 for(member = state->chptr->members; member; member = member->next_member) {
3280 if(!IsChanOp(member) && !HasVoice(member)) {
3281 sendcmdto_channel_butserv_butone(member->user, CMD_JOIN, member->channel, member->user, SKIP_OPS, ":%H", member->channel);
3289 * Helper function to convert bans
3292 mode_parse_ban(struct ParseState *state, ulong64 *flag_p)
3295 struct Ban *ban, *newban;
3297 if (state->parc <= 0) { /* Not enough args, send ban list */
3298 if (MyUser(state->sptr)) {
3299 if (*flag_p == MODE_EXCEPTION) {
3300 if (!(state->done & DONE_EXCEPTIONLIST)) {
3301 send_exception_list(state->sptr, state->chptr);
3302 state->done |= DONE_EXCEPTIONLIST;
3306 if (!(state->done & DONE_BANLIST)) {
3307 send_ban_list(state->sptr, state->chptr);
3308 state->done |= DONE_BANLIST;
3315 if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
3318 t_str = state->parv[state->args_used++]; /* grab arg */
3322 /* If they're not an oper, they can't change modes */
3323 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
3324 send_notoper(state);
3328 if ((s = strchr(t_str, ' ')))
3331 if (!*t_str || *t_str == ':') { /* warn if empty */
3332 if (MyUser(state->sptr))
3333 need_more_params(state->sptr, state->dir == MODE_ADD ? "MODE +b" :
3338 /* Clear all ADD/DEL/OVERLAPPED flags from ban list. */
3339 if (!(state->done & DONE_BANCLEAN)) {
3340 for (ban = state->chptr->banlist; ban; ban = ban->next)
3341 ban->flags &= ~(BAN_ADD | BAN_DEL | BAN_OVERLAPPED);
3342 state->done |= DONE_BANCLEAN;
3345 /* remember the ban for the moment... */
3346 newban = state->banlist + (state->numbans++);
3348 newban->flags = ((state->dir == MODE_ADD) ? BAN_ADD : BAN_DEL)
3349 | (*flag_p == MODE_BAN ? 0 : BAN_EXCEPTION);
3350 set_ban_mask(newban, collapse(pretty_mask(t_str)));
3351 ircd_strncpy(newban->who, IsUser(state->sptr) ? cli_name(state->sptr) : "*", NICKLEN);
3352 newban->when = TStime();
3353 apply_ban(&state->chptr->banlist, newban, 0);
3357 * This is the bottom half of the ban processor
3360 mode_process_bans(struct ParseState *state)
3362 struct Ban *ban, *newban, *prevban, *nextban;
3368 for (prevban = 0, ban = state->chptr->banlist; ban; ban = nextban) {
3370 banlen = strlen(ban->banstr);
3372 nextban = ban->next;
3374 if ((ban->flags & (BAN_DEL | BAN_ADD)) == (BAN_DEL | BAN_ADD)) {
3376 prevban->next = 0; /* Break the list; ban isn't a real ban */
3378 state->chptr->banlist = 0;
3384 } else if (ban->flags & BAN_DEL) { /* Deleted a ban? */
3386 DupString(bandup, ban->banstr);
3387 modebuf_mode_string(state->mbuf, MODE_DEL | ((ban->flags & BAN_EXCEPTION) ? MODE_EXCEPTION : MODE_BAN),
3390 if (state->flags & MODE_PARSE_SET) { /* Ok, make it take effect */
3391 if (prevban) /* clip it out of the list... */
3392 prevban->next = ban->next;
3394 state->chptr->banlist = ban->next;
3401 continue; /* next ban; keep prevban like it is */
3403 ban->flags &= BAN_IPMASK; /* unset other flags */
3404 } else if (ban->flags & BAN_ADD) { /* adding a ban? */
3406 prevban->next = 0; /* Break the list; ban isn't a real ban */
3408 state->chptr->banlist = 0;
3410 /* If we're supposed to ignore it, do so. */
3411 if (ban->flags & BAN_OVERLAPPED &&
3412 !(state->flags & MODE_PARSE_BOUNCE)) {
3416 if (state->flags & MODE_PARSE_SET && MyUser(state->sptr) &&
3417 (len > (feature_int(FEAT_AVBANLEN) * feature_int(FEAT_MAXBANS)) ||
3418 count > feature_int(FEAT_MAXBANS))) {
3419 send_reply(state->sptr, ERR_BANLISTFULL, state->chptr->chname,
3425 /* add the ban to the buffer */
3426 DupString(bandup, ban->banstr);
3427 modebuf_mode_string(state->mbuf, MODE_ADD | ((ban->flags & BAN_EXCEPTION) ? MODE_EXCEPTION : MODE_BAN),
3430 if (state->flags & MODE_PARSE_SET) { /* create a new ban */
3431 newban = make_ban(ban->banstr);
3432 strcpy(newban->who, ban->who);
3433 newban->when = ban->when;
3434 newban->flags = ban->flags & (BAN_IPMASK | BAN_EXCEPTION);
3436 newban->next = state->chptr->banlist; /* and link it in */
3437 state->chptr->banlist = newban;
3446 } /* for (prevban = 0, ban = state->chptr->banlist; ban; ban = nextban) { */
3448 if (changed) /* if we changed the ban list, we must invalidate the bans */
3449 mode_ban_invalidate(state->chptr);
3453 * Helper function to process client changes
3456 mode_parse_client(struct ParseState *state, ulong64 *flag_p)
3460 struct Client *acptr;
3461 struct Membership *member;
3462 int oplevel = MAXOPLEVEL + 1;
3466 if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
3469 if (state->parc <= 0) /* return if not enough args */
3472 t_str = state->parv[state->args_used++]; /* grab arg */
3476 /* If they're not an oper, they can't change modes */
3477 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
3478 send_notoper(state);
3482 if (MyUser(state->sptr)) {
3483 colon = strchr(t_str, ':');
3484 if (colon != NULL) {
3486 req_oplevel = atoi(colon);
3487 if (*flag_p == CHFL_VOICE || state->dir == MODE_DEL) {
3488 /* Ignore the colon and its argument. */
3489 } else if (!(state->flags & MODE_PARSE_FORCE)
3491 && (req_oplevel < OpLevel(state->member)
3492 || (req_oplevel == OpLevel(state->member)
3493 && OpLevel(state->member) < MAXOPLEVEL)
3494 || req_oplevel > MAXOPLEVEL)) {
3495 send_reply(state->sptr, ERR_NOTLOWEROPLEVEL,
3496 t_str, state->chptr->chname,
3497 OpLevel(state->member), req_oplevel, "op",
3498 OpLevel(state->member) == req_oplevel ? "the same" : "a higher");
3499 } else if (req_oplevel <= MAXOPLEVEL)
3500 oplevel = req_oplevel;
3502 /* find client we're manipulating */
3503 acptr = find_chasing(state->sptr, t_str, NULL);
3505 if (t_str[5] == ':') {
3507 oplevel = atoi(t_str + 6);
3509 acptr = findNUser(t_str);
3513 return; /* find_chasing() already reported an error to the user */
3515 for (i = 0; i < MAXPARA; i++) /* find an element to stick them in */
3516 if (!state->cli_change[i].flag || (state->cli_change[i].client == acptr &&
3517 state->cli_change[i].flag & flag_p[0]))
3518 break; /* found a slot */
3520 /* If we are going to bounce this deop, mark the correct oplevel. */
3521 if (state->flags & MODE_PARSE_BOUNCE
3522 && state->dir == MODE_DEL
3523 && flag_p[0] == MODE_CHANOP
3524 && (member = find_member_link(state->chptr, acptr)))
3525 oplevel = OpLevel(member);
3527 /* Store what we're doing to them */
3528 state->cli_change[i].flag = state->dir | flag_p[0];
3529 state->cli_change[i].oplevel = oplevel;
3530 state->cli_change[i].client = acptr;
3534 * Helper function to process the changed client list
3537 mode_process_clients(struct ParseState *state)
3540 struct Membership *member;
3542 for (i = 0; state->cli_change[i].flag; i++) {
3543 assert(0 != state->cli_change[i].client);
3545 /* look up member link */
3546 if (!(member = find_member_link(state->chptr,
3547 state->cli_change[i].client)) ||
3548 (MyUser(state->sptr) && IsZombie(member))) {
3549 if (MyUser(state->sptr))
3550 send_reply(state->sptr, ERR_USERNOTINCHANNEL,
3551 cli_name(state->cli_change[i].client),
3552 state->chptr->chname);
3555 if (member && (IsInvisibleJoin(member) && state->cli_change[i].client != state->sptr) && IsDelayedJoin(member)) {
3556 if (MyUser(state->sptr))
3557 send_reply(state->sptr, ERR_USERNOTINCHANNEL,
3558 cli_name(state->cli_change[i].client),
3559 state->chptr->chname);
3563 if ((state->cli_change[i].flag & MODE_ADD &&
3564 (state->cli_change[i].flag & member->status)) ||
3565 (state->cli_change[i].flag & MODE_DEL &&
3566 !(state->cli_change[i].flag & member->status)))
3567 continue; /* no change made, don't do anything */
3569 /* see if the deop is allowed */
3570 if ((state->cli_change[i].flag & (MODE_DEL | MODE_CHANOP)) ==
3571 (MODE_DEL | MODE_CHANOP)) {
3572 /* Prevent +k users from being deopped, but allow extra ops to deop
3573 * +k users. We do not prevent deopping _REAL_ services because /opmode
3574 * will always allow this.
3576 if(IsChannelService(state->cli_change[i].client) && !IsXtraOp(state->sptr) && state->sptr != state->cli_change[i].client) {
3577 if (state->flags & MODE_PARSE_FORCE) /* it was forced */
3578 sendto_opmask_butone(0, SNO_HACK4, "Deop of +k user on %H by %s",
3580 (IsServer(state->sptr) ? cli_name(state->sptr) :
3581 cli_name((cli_user(state->sptr))->server)));
3583 else if (MyUser(state->sptr) && state->flags & MODE_PARSE_SET) {
3584 send_reply(state->sptr, ERR_ISCHANSERVICE,
3585 cli_name(state->cli_change[i].client),
3586 state->chptr->chname);
3591 /* check deop for local user */
3592 if (MyUser(state->sptr)) {
3594 /* don't allow local opers to be deopped on local channels */
3595 if (state->cli_change[i].client != state->sptr &&
3596 IsLocalChannel(state->chptr->chname) &&
3597 HasPriv(state->cli_change[i].client, PRIV_DEOP_LCHAN)) {
3598 send_reply(state->sptr, ERR_ISOPERLCHAN,
3599 cli_name(state->cli_change[i].client),
3600 state->chptr->chname);
3604 /* Forbid deopping other members with an oplevel less than
3605 * one's own level, and other members with an oplevel the same
3606 * as one's own unless both are at MAXOPLEVEL. */
3607 if (state->sptr != state->cli_change[i].client
3609 && ((OpLevel(member) < OpLevel(state->member))
3610 || (OpLevel(member) == OpLevel(state->member)
3611 && OpLevel(member) < MAXOPLEVEL))) {
3612 int equal = (OpLevel(member) == OpLevel(state->member));
3613 send_reply(state->sptr, ERR_NOTLOWEROPLEVEL,
3614 cli_name(state->cli_change[i].client),
3615 state->chptr->chname,
3616 OpLevel(state->member), OpLevel(member),
3617 "deop", equal ? "the same" : "a higher");
3623 /* set op-level of member being opped */
3624 if ((state->cli_change[i].flag & (MODE_ADD | MODE_CHANOP)) ==
3625 (MODE_ADD | MODE_CHANOP)) {
3626 /* If a valid oplevel was specified, use it.
3627 * Otherwise, if being opped by an outsider, get MAXOPLEVEL.
3628 * Otherwise, if not an apass channel, or state->member has
3629 * MAXOPLEVEL, get oplevel MAXOPLEVEL.
3630 * Otherwise, get state->member's oplevel+1.
3632 if (state->cli_change[i].oplevel <= MAXOPLEVEL)
3633 SetOpLevel(member, state->cli_change[i].oplevel);
3634 else if (!state->member)
3635 SetOpLevel(member, MAXOPLEVEL);
3636 else if (OpLevel(state->member) >= MAXOPLEVEL)
3637 SetOpLevel(member, OpLevel(state->member));
3639 SetOpLevel(member, OpLevel(state->member) + 1);
3642 int user_visible = (member->status & CHFL_VOICED_OR_OPPED);
3644 /* actually effect the change */
3645 if (state->flags & MODE_PARSE_SET) {
3646 if (state->cli_change[i].flag & MODE_ADD) {
3647 if (IsDelayedJoin(member) && !IsZombie(member))
3648 RevealDelayedJoin(member);
3649 member->status |= (state->cli_change[i].flag &
3650 (MODE_CHANOP | MODE_VOICE));
3651 if (state->cli_change[i].flag & MODE_CHANOP)
3652 ClearDeopped(member);
3654 member->status &= ~(state->cli_change[i].flag &
3655 (MODE_CHANOP | MODE_VOICE));
3658 /* accumulate the change */
3659 modebuf_mode_client(state->mbuf, state->cli_change[i].flag,
3660 state->cli_change[i].client,
3661 state->cli_change[i].oplevel);
3663 if((member->channel->mode.mode & MODE_AUDITORIUM)) {
3664 //join or part the user
3665 if((member->status & CHFL_VOICED_OR_OPPED) && !user_visible) {
3666 sendcmdto_channel_butserv_butone(member->user, CMD_JOIN, member->channel, member->user, SKIP_OPS, ":%H", member->channel);
3667 } else if(!(member->status & CHFL_VOICED_OR_OPPED) && user_visible) {
3668 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.");
3670 if(MyUser(member->user) && (state->cli_change[i].flag & MODE_CHANOP)) {
3671 //do_names(member->user, member->channel, NAMES_ALL|NAMES_EON|((member->status & MODE_CHANOP) ? 0 : NAMES_OPS));
3672 //this is not working for all users :( so we have to send join/part events
3673 struct Membership *member2;
3674 if (state->cli_change[i].flag & MODE_ADD) {
3676 for(member2 = state->chptr->members; member2; member2 = member2->next_member) {
3677 if(!IsChanOp(member2) && !HasVoice(member2)) {
3678 sendcmdto_one(member2->user, CMD_JOIN, member->user, ":%H", member->channel);
3683 for(member2 = state->chptr->members; member2; member2 = member2->next_member) {
3684 if(!IsChanOp(member2) && !HasVoice(member2) && member != member2) {
3685 sendcmdto_one(member2->user, CMD_PART, member->user, "%H :%s", member->channel, "invisible user on +u channel.");
3691 } /* for (i = 0; state->cli_change[i].flags; i++) */
3695 * Helper function to process the simple modes
3698 mode_parse_mode(struct ParseState *state, ulong64 *flag_p)
3700 /* If they're not an oper, they can't change modes */
3701 if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
3702 send_notoper(state);
3709 /* Local users are not permitted to change registration status */
3710 if (flag_p[0] == MODE_REGISTERED && !(state->flags & MODE_PARSE_FORCE) && MyUser(state->sptr))
3713 if(flag_p[0] == MODE_AUDITORIUM)
3714 audit_chan_users(state, flag_p);
3716 if (state->dir == MODE_ADD) {
3717 state->add |= flag_p[0];
3718 state->del &= ~flag_p[0];
3720 if (flag_p[0] & MODE_SECRET) {
3721 state->add &= ~MODE_PRIVATE;
3722 state->del |= MODE_PRIVATE;
3723 } else if (flag_p[0] & MODE_PRIVATE) {
3724 state->add &= ~MODE_SECRET;
3725 state->del |= MODE_SECRET;
3728 state->add &= ~flag_p[0];
3729 state->del |= flag_p[0];
3732 assert(0 == (state->add & state->del));
3733 assert((MODE_SECRET | MODE_PRIVATE) !=
3734 (state->add & (MODE_SECRET | MODE_PRIVATE)));
3738 * This routine is intended to parse MODE or OPMODE commands and effect the
3739 * changes (or just build the bounce buffer).
3741 * \param[out] mbuf Receives parsed representation of mode change.
3742 * \param[in] cptr Connection that sent the message to this server.
3743 * \param[in] sptr Original source of the message.
3744 * \param[in] chptr Channel whose modes are being changed.
3745 * \param[in] parc Number of valid strings in \a parv.
3746 * \param[in] parv Text arguments representing mode change, with the
3747 * zero'th element containing a string like "+m" or "-o".
3748 * \param[in] flags Set of bitwise MODE_PARSE_* flags.
3749 * \param[in] member If non-null, the channel member attempting to change the modes.
3752 mode_parse(struct ModeBuf *mbuf, struct Client *cptr, struct Client *sptr,
3753 struct Channel *chptr, int parc, char *parv[], unsigned int flags,
3754 struct Membership* member)
3756 static ulong64 chan_flags[] = {
3761 MODE_MODERATED, 'm',
3762 MODE_TOPICLIMIT, 't',
3763 MODE_INVITEONLY, 'i',
3764 MODE_NOPRIVMSGS, 'n',
3768 MODE_REGISTERED, 'R',
3773 MODE_WASDELJOINS, 'd',
3777 /* MODE_EXCEPTION, 'e',*/
3780 MODE_QUARANTINE, 'Q',
3783 MODE_AUDITORIUM, 'u',
3793 struct ParseState state;
3804 state.chptr = chptr;
3805 state.member = member;
3808 state.flags = flags;
3809 state.dir = MODE_ADD;
3813 state.args_used = 0;
3814 state.max_args = MAXMODEPARAMS;
3817 for (i = 0; i < MAXPARA; i++) { /* initialize ops/voices arrays */
3818 state.banlist[i].next = 0;
3819 state.banlist[i].who[0] = '\0';
3820 state.banlist[i].when = 0;
3821 state.banlist[i].flags = 0;
3822 state.cli_change[i].flag = 0;
3823 state.cli_change[i].client = 0;
3826 modestr = state.parv[state.args_used++];
3830 for (; *modestr; modestr++) {
3831 for (flag_p = chan_flags; flag_p[0]; flag_p += 2) /* look up flag */
3832 if (flag_p[1] == *modestr)
3835 if (!flag_p[0]) { /* didn't find it? complain and continue */
3836 if (MyUser(state.sptr))
3837 send_reply(state.sptr, ERR_UNKNOWNMODE, *modestr);
3842 case '+': /* switch direction to MODE_ADD */
3843 case '-': /* switch direction to MODE_DEL */
3844 state.dir = flag_p[0];
3847 case 'l': /* deal with limits */
3848 mode_parse_limit(&state, flag_p);
3850 case 'a': /* deal with limits */
3851 mode_parse_access(&state, flag_p);
3854 mode_parse_altchan(&state, flag_p);
3857 mode_parse_noflood(&state, flag_p);
3860 if(IsNetServ(state.sptr) && IsSecurityServ(state.sptr))
3861 mode_parse_mode(&state, flag_p);
3863 case 'k': /* deal with keys */
3864 mode_parse_key(&state, flag_p);
3866 case 'A': /* deal with Admin passes */
3867 if (IsServer(cptr) || feature_bool(FEAT_OPLEVELS))
3868 mode_parse_apass(&state, flag_p);
3870 case 'U': /* deal with user passes */
3871 if (IsServer(cptr) || feature_bool(FEAT_OPLEVELS))
3872 mode_parse_upass(&state, flag_p);
3876 if(MyUser(state.sptr) && !(state.flags & MODE_PARSE_FORCE) && !feature_bool(FEAT_EXCEPT_ENABLE)) break;*/
3877 case 'b': /* deal with bans */
3878 mode_parse_ban(&state, flag_p);
3881 case 'd': /* deal with hidden members */
3882 reveal_hidden_chan_users(&state, flag_p);
3885 case 'o': /* deal with ops/voice */
3887 mode_parse_client(&state, flag_p);
3890 case 'z': /* remote clients are allowed to change +z */
3891 if(!MyUser(state.sptr) || (state.flags & MODE_PARSE_FORCE))
3892 mode_parse_mode(&state, flag_p);
3894 case 'O': /* remote clients are allowed to change +z */
3895 //struct User* user = cli_user(cptr);
3896 //|| (chptr.chanowner && IsAccount(cptr) && chptr.chanowner == user->account)
3897 if(!MyUser(state.sptr) || (state.flags & MODE_PARSE_FORCE) )
3898 mode_parse_mode(&state, flag_p);
3901 default: /* deal with other modes */
3902 mode_parse_mode(&state, flag_p);
3904 } /* switch (*modestr) */
3905 } /* for (; *modestr; modestr++) */
3907 if (state.flags & MODE_PARSE_BURST)
3908 break; /* don't interpret any more arguments */
3910 if (state.parc > 0) { /* process next argument in string */
3911 modestr = state.parv[state.args_used++];
3915 if (IsServer(state.cptr) && !state.parc && IsDigit(*modestr)) {
3918 if (!(state.flags & MODE_PARSE_SET)) /* don't set earlier TS if */
3919 break; /* we're then going to bounce the mode! */
3921 recv_ts = atoi(modestr);
3923 if (recv_ts && recv_ts < state.chptr->creationtime)
3924 state.chptr->creationtime = recv_ts; /* respect earlier TS */
3925 else if (recv_ts > state.chptr->creationtime) {
3926 struct Client *sserv;
3928 /* Check whether the originating server has fully processed
3929 * the burst to it. */
3931 if (!IsServer(sserv))
3932 sserv = cli_user(sserv)->server;
3933 if (IsBurstOrBurstAck(sserv)) {
3934 /* This is a legal but unusual case; the source server
3935 * probably just has not processed the BURST for this
3936 * channel. It SHOULD wipe out all its modes soon, so
3937 * silently ignore the mode change rather than send a
3938 * bounce that could desync modes from our side (that
3939 * have already been sent).
3941 state.mbuf->mb_add = 0;
3942 state.mbuf->mb_rem = 0;
3943 state.mbuf->mb_count = 0;
3944 return state.args_used;
3946 /* Server is desynced; bounce the mode and deop the source
3948 state.flags &= ~MODE_PARSE_SET;
3949 state.flags |= MODE_PARSE_BOUNCE;
3950 state.mbuf->mb_dest &= ~(MODEBUF_DEST_CHANNEL | MODEBUF_DEST_HACK4);
3951 state.mbuf->mb_dest |= MODEBUF_DEST_BOUNCE | MODEBUF_DEST_HACK2;
3952 if (!IsServer(state.cptr))
3953 state.mbuf->mb_dest |= MODEBUF_DEST_DEOP;
3957 break; /* break out of while loop */
3958 } else if (state.flags & MODE_PARSE_STRICT ||
3959 (MyUser(state.sptr) && state.max_args <= 0)) {
3960 state.parc++; /* we didn't actually gobble the argument */
3962 break; /* break out of while loop */
3965 } /* while (*modestr) */
3968 * the rest of the function finishes building resultant MODEs; if the
3969 * origin isn't a member or an oper, skip it.
3971 if (!state.mbuf || state.flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER))
3972 return state.args_used; /* tell our parent how many args we gobbled */
3974 t_mode = state.chptr->mode.mode;
3976 if (state.del & t_mode) { /* delete any modes to be deleted... */
3977 modebuf_mode(state.mbuf, MODE_DEL | (state.del & t_mode));
3979 t_mode &= ~state.del;
3981 if (state.add & ~t_mode) { /* add any modes to be added... */
3982 modebuf_mode(state.mbuf, MODE_ADD | (state.add & ~t_mode));
3984 t_mode |= state.add;
3987 if (state.flags & MODE_PARSE_SET) { /* set the channel modes */
3988 if ((state.chptr->mode.mode & MODE_INVITEONLY) &&
3989 !(t_mode & MODE_INVITEONLY))
3990 mode_invite_clear(state.chptr);
3992 state.chptr->mode.mode = t_mode;
3995 if (state.flags & MODE_PARSE_WIPEOUT) {
3996 if (state.chptr->mode.limit && !(state.done & DONE_LIMIT))
3997 modebuf_mode_uint(state.mbuf, MODE_DEL | MODE_LIMIT,
3998 state.chptr->mode.limit);
3999 if (state.chptr->mode.access && !(state.done & DONE_ACCESS))
4000 modebuf_mode_uint(state.mbuf, MODE_DEL | MODE_ACCESS,
4001 state.chptr->mode.access);
4002 if (state.chptr->mode.altchan && !(state.done & DONE_ALTCHAN))
4003 modebuf_mode_string(state.mbuf, MODE_DEL | MODE_ALTCHAN,
4004 state.chptr->mode.altchan, 0);
4005 if (state.chptr->mode.noflood && !(state.done & DONE_NOFLOOD))
4006 modebuf_mode_string(state.mbuf, MODE_DEL | MODE_NOFLOOD,
4007 state.chptr->mode.noflood, 0);
4008 if (*state.chptr->mode.key && !(state.done & DONE_KEY_DEL))
4009 modebuf_mode_string(state.mbuf, MODE_DEL | MODE_KEY,
4010 state.chptr->mode.key, 0);
4011 if (*state.chptr->mode.upass && !(state.done & DONE_UPASS_DEL))
4012 modebuf_mode_string(state.mbuf, MODE_DEL | MODE_UPASS,
4013 state.chptr->mode.upass, 0);
4014 if (*state.chptr->mode.apass && !(state.done & DONE_APASS_DEL))
4015 modebuf_mode_string(state.mbuf, MODE_DEL | MODE_APASS,
4016 state.chptr->mode.apass, 0);
4019 if (state.done & DONE_BANCLEAN) /* process bans */
4020 mode_process_bans(&state);
4022 /* process client changes */
4023 if (state.cli_change[0].flag)
4024 mode_process_clients(&state);
4026 return state.args_used; /* tell our parent how many args we gobbled */
4030 * Initialize a join buffer
4033 joinbuf_init(struct JoinBuf *jbuf, struct Client *source,
4034 struct Client *connect, unsigned int type, char *comment,
4040 assert(0 != source);
4041 assert(0 != connect);
4043 jbuf->jb_source = source; /* just initialize struct JoinBuf */
4044 jbuf->jb_connect = connect;
4045 jbuf->jb_type = type;
4046 jbuf->jb_comment = comment;
4047 jbuf->jb_create = create;
4049 jbuf->jb_strlen = (((type == JOINBUF_TYPE_JOIN ||
4050 type == JOINBUF_TYPE_PART ||
4051 type == JOINBUF_TYPE_PARTALL) ?
4052 STARTJOINLEN : STARTCREATELEN) +
4053 (comment ? strlen(comment) + 2 : 0));
4055 for (i = 0; i < MAXJOINARGS; i++)
4056 jbuf->jb_channels[i] = 0;
4060 * Add a channel to the join buffer
4063 joinbuf_join(struct JoinBuf *jbuf, struct Channel *chan, unsigned int flags)
4071 sendcmdto_serv_butone(jbuf->jb_source, CMD_JOIN, jbuf->jb_connect, "0");
4075 is_local = IsLocalChannel(chan->chname);
4077 if (jbuf->jb_type == JOINBUF_TYPE_PART ||
4078 jbuf->jb_type == JOINBUF_TYPE_PARTALL) {
4079 struct Membership *member = find_member_link(chan, jbuf->jb_source);
4080 if (IsUserParting(member))
4082 SetUserParting(member);
4084 /* Send notification to channel */
4085 if((chan->mode.mode & MODE_AUDITORIUM) && !(member->status & CHFL_VOICED_OR_OPPED)) {
4086 //send part to ops only
4087 sendcmdto_channel_butserv_butone(jbuf->jb_source, CMD_PART, chan, NULL, SKIP_NONOPS, "%H :%s", chan, jbuf->jb_comment);
4088 if(MyUser(jbuf->jb_source))
4089 sendcmdto_one(jbuf->jb_source, CMD_PART, jbuf->jb_source, "%H :%s", chan, jbuf->jb_comment);
4090 } else if (!(flags & (CHFL_ZOMBIE | CHFL_DELAYED)))
4091 sendcmdto_channel_butserv_butone(jbuf->jb_source, CMD_PART, chan, NULL, 0,
4092 (flags & CHFL_BANNED || !jbuf->jb_comment) ?
4093 ":%H" : "%H :%s", chan, jbuf->jb_comment);
4094 else if (MyUser(jbuf->jb_source))
4095 sendcmdto_one(jbuf->jb_source, CMD_PART, jbuf->jb_source,
4096 (flags & CHFL_BANNED || !jbuf->jb_comment) ?
4097 ":%H" : "%H :%s", chan, jbuf->jb_comment);
4098 /* XXX: Shouldn't we send a PART here anyway? */
4099 /* to users on the channel? Why? From their POV, the user isn't on
4100 * the channel anymore anyway. We don't send to servers until below,
4101 * when we gang all the channel parts together. Note that this is
4102 * exactly the same logic, albeit somewhat more concise, as was in
4103 * the original m_part.c */
4105 if (jbuf->jb_type == JOINBUF_TYPE_PARTALL ||
4106 is_local) /* got to remove user here */
4107 remove_user_from_channel(jbuf->jb_source, chan);
4109 int oplevel = !chan->mode.apass[0] ? MAXOPLEVEL
4110 : (flags & CHFL_CHANNEL_MANAGER) ? 0
4112 /* Add user to channel */
4113 if (((chan->mode.mode & MODE_DELJOINS) && !(flags & CHFL_VOICED_OR_OPPED)) || ((flags & CHFL_INVISIBLE) && !(flags & CHFL_VOICED_OR_OPPED))) {
4114 add_user_to_channel(chan, jbuf->jb_source, flags | CHFL_DELAYED, oplevel);
4116 add_user_to_channel(chan, jbuf->jb_source, flags, oplevel);
4118 /* send JOIN notification to all servers (CREATE is sent later). */
4119 if (jbuf->jb_type != JOINBUF_TYPE_CREATE && !is_local) {
4120 if ((flags & CHFL_INVISIBLE) && !(flags & CHFL_VOICED_OR_OPPED)) {
4121 sendcmdto_serv_butone(jbuf->jb_source, CMD_JOIN, jbuf->jb_connect,
4122 "%H %Tu %i", chan, chan->creationtime, 1);
4124 sendcmdto_serv_butone(jbuf->jb_source, CMD_JOIN, jbuf->jb_connect,
4125 "%H %Tu %i", chan, chan->creationtime, 0);
4129 if((chan->mode.mode & MODE_AUDITORIUM) && !(flags & CHFL_VOICED_OR_OPPED)) {
4130 //we have to send this JOIN event to ops only...
4131 sendcmdto_channel_butserv_butone(jbuf->jb_source, CMD_JOIN, chan, NULL, SKIP_NONOPS, "%H", chan);
4132 if(MyUser(jbuf->jb_source))
4133 sendcmdto_one(jbuf->jb_source, CMD_JOIN, jbuf->jb_source, ":%H", chan);
4135 else if (!((chan->mode.mode & MODE_DELJOINS) && !(flags & CHFL_VOICED_OR_OPPED)) && !((flags & CHFL_INVISIBLE) && !(flags & CHFL_VOICED_OR_OPPED))) {
4136 /* Send the notification to the channel */
4137 sendcmdto_channel_butserv_butone(jbuf->jb_source, CMD_JOIN, chan, NULL, 0, "%H", chan);
4139 /* send an op, too, if needed */
4140 if (flags & CHFL_CHANOP && (oplevel < MAXOPLEVEL || !MyUser(jbuf->jb_source)))
4141 sendcmdto_channel_butserv_butone((chan->mode.apass[0] ? &his : jbuf->jb_source),
4142 CMD_MODE, chan, NULL, 0, "%H +o %C",
4143 chan, jbuf->jb_source);
4144 } else if (MyUser(jbuf->jb_source)) {
4145 sendcmdto_one(jbuf->jb_source, CMD_JOIN, jbuf->jb_source, ":%H", chan);
4149 if (jbuf->jb_type == JOINBUF_TYPE_PARTALL ||
4150 jbuf->jb_type == JOINBUF_TYPE_JOIN || is_local)
4151 return; /* don't send to remote */
4153 /* figure out if channel name will cause buffer to be overflowed */
4154 len = chan ? strlen(chan->chname) + 1 : 2;
4155 if (jbuf->jb_strlen + len > BUFSIZE)
4156 joinbuf_flush(jbuf);
4158 /* add channel to list of channels to send and update counts */
4159 jbuf->jb_channels[jbuf->jb_count++] = chan;
4160 jbuf->jb_strlen += len;
4162 /* if we've used up all slots, flush */
4163 if (jbuf->jb_count >= MAXJOINARGS)
4164 joinbuf_flush(jbuf);
4168 * Flush the channel list to remote servers
4171 joinbuf_flush(struct JoinBuf *jbuf)
4173 char chanlist[BUFSIZE];
4177 if (!jbuf->jb_count || jbuf->jb_type == JOINBUF_TYPE_PARTALL ||
4178 jbuf->jb_type == JOINBUF_TYPE_JOIN)
4179 return 0; /* no joins to process */
4181 for (i = 0; i < jbuf->jb_count; i++) { /* build channel list */
4182 build_string(chanlist, &chanlist_i,
4183 jbuf->jb_channels[i] ? jbuf->jb_channels[i]->chname : "0", 0,
4184 i == 0 ? '\0' : ',');
4185 if (JOINBUF_TYPE_PART == jbuf->jb_type)
4186 /* Remove user from channel */
4187 remove_user_from_channel(jbuf->jb_source, jbuf->jb_channels[i]);
4189 jbuf->jb_channels[i] = 0; /* mark slot empty */
4192 jbuf->jb_count = 0; /* reset base counters */
4193 jbuf->jb_strlen = ((jbuf->jb_type == JOINBUF_TYPE_PART ?
4194 STARTJOINLEN : STARTCREATELEN) +
4195 (jbuf->jb_comment ? strlen(jbuf->jb_comment) + 2 : 0));
4197 /* and send the appropriate command */
4198 switch (jbuf->jb_type) {
4199 case JOINBUF_TYPE_CREATE:
4200 sendcmdto_serv_butone(jbuf->jb_source, CMD_CREATE, jbuf->jb_connect,
4201 "%s %Tu", chanlist, jbuf->jb_create);
4204 case JOINBUF_TYPE_PART:
4205 sendcmdto_serv_butone(jbuf->jb_source, CMD_PART, jbuf->jb_connect,
4206 jbuf->jb_comment ? "%s :%s" : "%s", chanlist,
4214 /* Returns TRUE (1) if client is invited, FALSE (0) if not */
4215 int IsInvited(struct Client* cptr, const void* chptr)
4219 for (lp = (cli_user(cptr))->invited; lp; lp = lp->next)
4220 if (lp->value.chptr == chptr)
4225 /* RevealDelayedJoin: sends a join for a hidden user */
4227 void RevealDelayedJoin(struct Membership *member)
4229 ClearDelayedJoin(member);
4230 sendcmdto_channel_butserv_butone(member->user, CMD_JOIN, member->channel, member->user, 0, ":%H",
4232 CheckDelayedJoins(member->channel);
4235 /* CheckDelayedJoins: checks and clear +d if necessary */
4237 void CheckDelayedJoins(struct Channel *chan)
4239 if ((chan->mode.mode & MODE_WASDELJOINS) && !find_delayed_joins(chan)) {
4240 chan->mode.mode &= ~MODE_WASDELJOINS;
4241 sendcmdto_channel_butserv_butone(&me, CMD_MODE, chan, NULL, 0,
4243 sendcmdto_channel_servers_butone(&me, CMD_MODE, chan, NULL, 0,
4248 void CheckEnableDelayedJoins(struct Channel *chan) {
4249 if (!(chan->mode.mode & MODE_WASDELJOINS) && find_delayed_joins(chan)) {
4250 chan->mode.mode |= MODE_WASDELJOINS;
4251 sendcmdto_channel_butserv_butone(&me, CMD_MODE, chan, NULL, 0,
4253 sendcmdto_channel_servers_butone(&me, CMD_MODE, chan, NULL, 0,
4258 /* checks whether a channel is nonpersistent with no users and deletes it
4259 * returns 1 if deleted, otherwise 0
4261 signed int destruct_nonpers_channel(struct Channel *chptr) {
4262 if(!(chptr->mode.mode & MODE_PERSIST) && chptr->users == 0) {
4263 if(chptr->destruct_event)
4264 remove_destruct_event(chptr);
4265 destruct_channel(chptr);
4271 /** Send a join for the user if (s)he is a hidden member of the channel.
4273 void RevealDelayedJoinIfNeeded(struct Client *sptr, struct Channel *chptr)
4275 struct Membership *member = find_member_link(chptr, sptr);
4276 if (member && IsDelayedJoin(member) && !IsInvisibleJoin(member))
4277 RevealDelayedJoin(member);
4280 /** Extended multi target message block check.
4281 * The channelmode MODE_NOAMSGS prevents multi-target messages from being sent
4282 * to the channel. Since many clients sent these so called AMSGS manually with
4283 * one PRIVMSG per channel, we have this extended check which prevents messages
4284 * from being sent to multiple channels.
4286 * The check is quite simple: We save the last sent message of every client.
4287 * When the client sends a new PRIVMSG to another channel, we compare the
4288 * message to the previously sent message and if they equal we may drop the new
4289 * message instead of broadcasting it.
4290 * There are several additional checks. That is, the new message must be sent in
4291 * a specific amount of time in which this check works. If the ducplicate
4292 * message is delayed for too long then it will pass this check. Furthermore,
4293 * there is a specific number a message must be already sent to different
4294 * channels until it is blocked.
4295 * Both numbers can be configured by the FEATURES subsystem.
4297 * This function returns 0 if the message may pass and 1 if the message should
4299 * For this function to work properly it must be called on every PRIVMSG which
4300 * is sent by any user.
4302 * Since users are creative and sometimes smart (damnit!) this function can be
4303 * outsourced into a dynamic library so we can adjust this function to protect
4304 * against any user scripts on-the-fly.
4308 int ext_amsg_block(struct Client *cptr, struct Channel *chptr, const char *msg)
4312 /* First on every message we check whether the mechanism is enabled.
4313 * If it is enabled, we check:
4314 * - whether the channel has MODE_NOAMSGS
4315 * - whether it was sent in between the configured time span
4316 * - whether it matches the previous message
4317 * in exactly this order. If at least one test fails, we do not block the
4319 * If at least one test failed we copy the message into the users buffer so
4320 * it will be checked the next time he sends a message. We also update the
4321 * timestamp of the user.
4323 amsg_time = feature_int(FEAT_NOAMSG_TIME);
4325 /* first of all strip the message (filter out invisible content) */
4326 char *stripped_message = MyMalloc(BUFSIZE + 1);
4327 strcpy(stripped_message, msg);
4328 char p = stripped_message[0];
4330 int is_visible = 1, is_ccode = 0, i = 0, j = 0;
4332 for(i = 0; p != '\n'; p = stripped_message[++i]) {
4336 } else if(is_ccode) {
4337 if((p >= 48 && p <= 57) || p == 44) {
4347 if(p != codes[j++]) {
4352 //END of color code...
4354 if(is_ccode != 1 && codes[j] != 0) is_ccode = 3;
4358 for(k = 0; k < j-1; k++) {
4359 if(codes[k] != 48) {
4365 } else if(is_ccode == 2) {
4367 } else if(is_ccode == 3) {
4375 stripped_message[p_pos++] = p;
4378 stripped_message[p_pos++] = 0;
4379 /* Allocate a new buffer if there is none, yet. */
4380 if(!cli_user(cptr)->lastmsg) {
4381 cli_user(cptr)->lastmsg = MyMalloc(BUFSIZE + 1);
4382 memset(cli_user(cptr)->lastmsg, 0, BUFSIZE + 1);
4384 if((chptr->mode.mode & MODE_NOAMSGS) &&
4385 ((cli_user(cptr)->lastmsg_time + amsg_time) >= CurrentTime) &&
4386 (strcmp(cli_user(cptr)->lastmsg, stripped_message) == 0)) {
4387 cli_user(cptr)->lastmsg_time = CurrentTime;
4388 cli_user(cptr)->lastmsg_num++;
4389 MyFree(stripped_message);
4390 if(cli_user(cptr)->lastmsg_num >= feature_int(FEAT_NOAMSG_NUM)) return 1;
4393 /* Message did not match so update the data. */
4394 cli_user(cptr)->lastmsg_time = CurrentTime;
4395 cli_user(cptr)->lastmsg_num = 0;
4396 strcpy(cli_user(cptr)->lastmsg, stripped_message);
4397 MyFree(stripped_message);
4402 /** Extended flood check.
4403 * The channelmode MODE_NOFLOOD prevents users from flooding the channel.
4405 * This function returns 0 if the message may pass and 1 if the message should
4407 * For this function to work properly it must be called on every PRIVMSG which
4408 * is sent by any user.
4412 int ext_noflood_block(struct Client *cptr, struct Channel *chptr) {
4413 if(chptr->mode.noflood == NULL || !chptr->mode.noflood) return 0;
4414 struct Membership *member = find_member_link(chptr, cptr);
4415 if(!member) return 0; //TODO: we've no check for -n channels implemented, yet
4416 //check if this user is really affected by +f
4417 unsigned int flags = (chptr->mode.noflood_value & 0x00000007); //0000 0000 0000 0000 0000 0000 0000 0111 = 0x00000007 >> 0
4418 unsigned int count = (chptr->mode.noflood_value & 0x00001ff8) >> 3; //0000 0000 0000 0000 0001 1111 1111 1000 = 0x00001ff8 >> 3
4419 int time = (chptr->mode.noflood_value & 0x07ffe000) >> 13; //0000 0111 1111 1111 1110 0000 0000 0000 = 0x07ffe000 >> 13
4420 if(count == 0 || time == 0) return 0;
4421 if(!(flags & FLFL_NOFLOOD) && HasPriv(cptr, PRIV_FLOOD))
4423 if(!(flags & FLFL_CHANOP) && (member->status & CHFL_CHANOP))
4425 if(!(flags & (FLFL_CHANOP | FLFL_VOICE)) && (member->status & CHFL_VOICE))
4428 struct MemberFlood *floodnode, *prev_floodnode;
4429 for (floodnode = member->flood; floodnode; floodnode = floodnode->next_memberflood) {
4430 if(floodnode->time + time > CurrentTime) {
4431 if(floodcount == 0 && floodnode != member->flood) {
4433 prev_floodnode->next_memberflood = free_MemberFlood;
4434 free_MemberFlood = prev_floodnode;
4435 member->flood = floodnode;
4439 prev_floodnode = floodnode;
4441 Debug((DEBUG_INFO, "floodcount: %i", floodcount));
4442 if(floodcount >= count) return 1; //blocked!
4443 //add a new floodnode :)
4444 if(free_MemberFlood) {
4445 floodnode = free_MemberFlood;
4446 free_MemberFlood = floodnode->next_memberflood;
4448 floodnode = (struct MemberFlood*) MyMalloc(sizeof(struct MemberFlood));
4449 floodnode->time = CurrentTime;
4450 floodnode->next_memberflood = NULL;
4452 prev_floodnode->next_memberflood = floodnode;
4454 member->flood = floodnode;