--- /dev/null
+/*
+ * IRC - Internet Relay Chat, ircd/channel.c
+ * Copyright (C) 1990 Jarkko Oikarinen and
+ * University of Oulu, Co Center
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 1, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+/** @file
+ * @brief Channel management and maintenance
+ * @version $Id$
+ */
+#include "config.h"
+
+#include "channel.h"
+#include "client.h"
+#include "destruct_event.h"
+#include "hash.h"
+#include "ircd.h"
+#include "ircd_alloc.h"
+#include "ircd_chattr.h"
+#include "ircd_defs.h"
+#include "ircd_features.h"
+#include "ircd_log.h"
+#include "ircd_reply.h"
+#include "ircd_snprintf.h"
+#include "ircd_string.h"
+#include "list.h"
+#include "match.h"
+#include "msg.h"
+#include "msgq.h"
+#include "numeric.h"
+#include "numnicks.h"
+#include "querycmds.h"
+#include "s_bsd.h"
+#include "s_conf.h"
+#include "s_debug.h"
+#include "s_misc.h"
+#include "s_user.h"
+#include "send.h"
+#include "struct.h"
+#include "sys.h"
+#include "whowas.h"
+
+/* #include <assert.h> -- Now using assert in ircd_log.h */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/** Linked list containing the full list of all channels */
+struct Channel* GlobalChannelList = 0;
+
+/** Number of struct Membership*'s allocated */
+static unsigned int membershipAllocCount;
+/** Freelist for struct Membership*'s */
+static struct Membership* membershipFreeList;
+/** Freelist for struct Ban*'s */
+static struct Ban* free_bans;
+/** Number of ban structures allocated. */
+static size_t bans_alloc;
+/** Number of ban structures in use. */
+static size_t bans_inuse;
+
+#if !defined(NDEBUG)
+/** return the length (>=0) of a chain of links.
+ * @param lp pointer to the start of the linked list
+ * @return the number of items in the list
+ */
+static int list_length(struct SLink *lp)
+{
+ int count = 0;
+
+ for (; lp; lp = lp->next)
+ ++count;
+ return count;
+}
+#endif
+
+/** Set the mask for a ban, checking for IP masks.
+ * @param[in,out] ban Ban structure to modify.
+ * @param[in] banstr Mask to ban.
+ */
+static void
+set_ban_mask(struct Ban *ban, const char *banstr)
+{
+ char *sep;
+ assert(banstr != NULL);
+ ircd_strncpy(ban->banstr, banstr, sizeof(ban->banstr) - 1);
+ sep = strrchr(banstr, '@');
+ if (sep) {
+ ban->nu_len = sep - banstr;
+ if (ipmask_parse(sep + 1, &ban->address, &ban->addrbits))
+ ban->flags |= BAN_IPMASK;
+ }
+}
+
+/** Allocate a new Ban structure.
+ * @param[in] banstr Ban mask to use.
+ * @return Newly allocated ban.
+ */
+struct Ban *
+make_ban(const char *banstr)
+{
+ struct Ban *ban;
+ if (free_bans) {
+ ban = free_bans;
+ free_bans = free_bans->next;
+ }
+ else if (!(ban = MyMalloc(sizeof(*ban))))
+ return NULL;
+ else
+ bans_alloc++;
+ bans_inuse++;
+ memset(ban, 0, sizeof(*ban));
+ set_ban_mask(ban, banstr);
+ return ban;
+}
+
+/** Deallocate a ban structure.
+ * @param[in] ban Ban to deallocate.
+ */
+void
+free_ban(struct Ban *ban)
+{
+ ban->next = free_bans;
+ free_bans = ban;
+ bans_inuse--;
+}
+
+/** Report ban usage to \a cptr.
+ * @param[in] cptr Client requesting information.
+ */
+void bans_send_meminfo(struct Client *cptr)
+{
+ struct Ban *ban;
+ size_t num_free;
+ for (num_free = 0, ban = free_bans; ban; ban = ban->next)
+ num_free++;
+ send_reply(cptr, SND_EXPLICIT | RPL_STATSDEBUG, ":Bans: inuse %zu(%zu) free %zu alloc %zu",
+ bans_inuse, bans_inuse * sizeof(*ban), num_free, bans_alloc);
+}
+
+/** return the struct Membership* that represents a client on a channel
+ * This function finds a struct Membership* which holds the state about
+ * a client on a specific channel. The code is smart enough to iterate
+ * over the channels a user is in, or the users in a channel to find the
+ * user depending on which is likely to be more efficient.
+ *
+ * @param chptr pointer to the channel struct
+ * @param cptr pointer to the client struct
+ *
+ * @returns pointer to the struct Membership representing this client on
+ * this channel. Returns NULL if the client is not on the channel.
+ * Returns NULL if the client is actually a server.
+ * @see find_channel_member()
+ */
+struct Membership* find_member_link(struct Channel* chptr, const struct Client* cptr)
+{
+ struct Membership *m;
+ assert(0 != cptr);
+ assert(0 != chptr);
+
+ /* Servers don't have member links */
+ if (IsServer(cptr)||IsMe(cptr))
+ return 0;
+
+ /* +k users are typically on a LOT of channels. So we iterate over who
+ * is in the channel. X/W are +k and are in about 5800 channels each.
+ * however there are typically no more than 1000 people in a channel
+ * at a time.
+ */
+ if (IsChannelService(cptr)) {
+ m = chptr->members;
+ while (m) {
+ assert(m->channel == chptr);
+ if (m->user == cptr)
+ return m;
+ m = m->next_member;
+ }
+ }
+ /* Users on the other hand aren't allowed on more than 15 channels. 50%
+ * of users that are on channels are on 2 or less, 95% are on 7 or less,
+ * and 99% are on 10 or less.
+ */
+ else {
+ m = (cli_user(cptr))->channel;
+ while (m) {
+ assert(m->user == cptr);
+ if (m->channel == chptr)
+ return m;
+ m = m->next_channel;
+ }
+ }
+ return 0;
+}
+
+/** Find the client structure for a nick name (user)
+ * Find the client structure for a nick name (user)
+ * using history mechanism if necessary. If the client is not found, an error
+ * message (NO SUCH NICK) is generated. If the client was found
+ * through the history, chasing will be 1 and otherwise 0.
+ *
+ * This function was used extensively in the P09 days, and since we now have
+ * numeric nicks is no longer quite as important.
+ *
+ * @param sptr Pointer to the client that has requested the search
+ * @param user a string representing the client to be found
+ * @param chasing a variable set to 0 if the user was found directly,
+ * 1 otherwise
+ * @returns a pointer the client, or NULL if the client wasn't found.
+ */
+struct Client* find_chasing(struct Client* sptr, const char* user, int* chasing)
+{
+ struct Client* who = FindClient(user);
+
+ if (chasing)
+ *chasing = 0;
+ if (who)
+ return who;
+
+ if (!(who = get_history(user, feature_int(FEAT_KILLCHASETIMELIMIT)))) {
+ send_reply(sptr, ERR_NOSUCHNICK, user);
+ return 0;
+ }
+ if (chasing)
+ *chasing = 1;
+ return who;
+}
+
+/** Decrement the count of users, and free if empty.
+ * Subtract one user from channel i (and free channel * block, if channel
+ * became empty).
+ *
+ * @param chptr The channel to subtract one from.
+ *
+ * @returns true (1) if channel still has members.
+ * false (0) if the channel is now empty.
+ */
+int sub1_from_channel(struct Channel* chptr)
+{
+ if (chptr->users > 1) /* Can be 0, called for an empty channel too */
+ {
+ assert(0 != chptr->members);
+ --chptr->users;
+ return 1;
+ }
+
+ chptr->users = 0;
+
+ /*
+ * Also channels without Apass set need to be kept alive,
+ * otherwise Bad Guys(tm) would be able to takeover
+ * existing channels too easily, and then set an Apass!
+ * However, if a channel without Apass becomes empty
+ * then we try to be kind to them and remove possible
+ * limiting modes.
+ */
+ chptr->mode.mode &= ~MODE_INVITEONLY;
+ chptr->mode.limit = 0;
+ /*
+ * We do NOT reset a possible key or bans because when
+ * the 'channel owners' can't get in because of a key
+ * or ban then apparently there was a fight/takeover
+ * on the channel and we want them to contact IRC opers
+ * who then will educate them on the use of Apass/Upass.
+ */
+ if (!chptr->mode.apass[0]) /* If no Apass, reset all modes. */
+ {
+ struct Ban *link, *next;
+ chptr->mode.mode = 0;
+ *chptr->mode.key = '\0';
+ while (chptr->invites)
+ del_invite(chptr->invites->value.cptr, chptr);
+ for (link = chptr->banlist; link; link = next) {
+ next = link->next;
+ free_ban(link);
+ }
+ chptr->banlist = NULL;
+
+ /* Immediately destruct empty -A channels if not using apass. */
+ if (!feature_bool(FEAT_OPLEVELS))
+ {
+ destruct_channel(chptr);
+ return 0;
+ }
+ }
+ if (TStime() - chptr->creationtime < 172800) /* Channel younger than 48 hours? */
+ schedule_destruct_event_1m(chptr); /* Get rid of it in approximately 4-5 minutes */
+ else
+ schedule_destruct_event_48h(chptr); /* Get rid of it in approximately 48 hours */
+
+ return 0;
+}
+
+/** Destroy an empty channel
+ * This function destroys an empty channel, removing it from hashtables,
+ * and removing any resources it may have consumed.
+ *
+ * @param chptr The channel to destroy
+ *
+ * @returns 0 (success)
+ *
+ * FIXME: Change to return void, this function never fails.
+ */
+int destruct_channel(struct Channel* chptr)
+{
+ struct Ban *ban, *next;
+
+ assert(0 == chptr->members);
+
+ /*
+ * Now, find all invite links from channel structure
+ */
+ while (chptr->invites)
+ del_invite(chptr->invites->value.cptr, chptr);
+
+ for (ban = chptr->banlist; ban; ban = next)
+ {
+ next = ban->next;
+ free_ban(ban);
+ }
+ if (chptr->prev)
+ chptr->prev->next = chptr->next;
+ else
+ GlobalChannelList = chptr->next;
+ if (chptr->next)
+ chptr->next->prev = chptr->prev;
+ hRemChannel(chptr);
+ --UserStats.channels;
+ /*
+ * make sure that channel actually got removed from hash table
+ */
+ assert(chptr->hnext == chptr);
+ MyFree(chptr);
+ return 0;
+}
+
+/** returns Membership * if a person is joined and not a zombie
+ * @param cptr Client
+ * @param chptr Channel
+ * @returns pointer to the client's struct Membership * on the channel if that
+ * user is a full member of the channel, or NULL otherwise.
+ *
+ * @see find_member_link()
+ */
+struct Membership* find_channel_member(struct Client* cptr, struct Channel* chptr)
+{
+ struct Membership* member;
+ assert(0 != chptr);
+
+ member = find_member_link(chptr, cptr);
+ return (member && !IsZombie(member)) ? member : 0;
+}
+
+/** Searches for a ban from a ban list that matches a user.
+ * @param[in] cptr The client to test.
+ * @param[in] banlist The list of bans to test.
+ * @return Pointer to a matching ban, or NULL if none exit.
+ */
+struct Ban *find_ban(struct Client *cptr, struct Ban *banlist)
+{
+ char nu[NICKLEN + USERLEN + 2];
+ char tmphost[HOSTLEN + 1];
+ char iphost[SOCKIPLEN + 1];
+ char *hostmask;
+ char *sr;
+ struct Ban *found;
+
+ /* Build nick!user and alternate host names. */
+ ircd_snprintf(0, nu, sizeof(nu), "%s!%s",
+ cli_name(cptr), cli_user(cptr)->username);
+ ircd_ntoa_r(iphost, &cli_ip(cptr));
+ if (!IsAccount(cptr))
+ sr = NULL;
+ else if (HasHiddenHost(cptr))
+ sr = cli_user(cptr)->realhost;
+ else
+ {
+ ircd_snprintf(0, tmphost, HOSTLEN, "%s.%s",
+ cli_user(cptr)->account, feature_str(FEAT_HIDDEN_HOST));
+ sr = tmphost;
+ }
+
+ /* Walk through ban list. */
+ for (found = NULL; banlist; banlist = banlist->next) {
+ int res;
+ /* If we have found a positive ban already, only consider exceptions. */
+ if (found && !(banlist->flags & BAN_EXCEPTION))
+ continue;
+ /* Compare nick!user portion of ban. */
+ banlist->banstr[banlist->nu_len] = '\0';
+ res = match(banlist->banstr, nu);
+ banlist->banstr[banlist->nu_len] = '@';
+ if (res)
+ continue;
+ /* Compare host portion of ban. */
+ hostmask = banlist->banstr + banlist->nu_len + 1;
+ if (!((banlist->flags & BAN_IPMASK)
+ && ipmask_check(&cli_ip(cptr), &banlist->address, banlist->addrbits))
+ && match(hostmask, cli_user(cptr)->host)
+ && !(sr && !match(hostmask, sr)))
+ continue;
+ /* If an exception matches, no ban can match. */
+ if (banlist->flags & BAN_EXCEPTION)
+ return NULL;
+ /* Otherwise, remember this ban but keep searching for an exception. */
+ found = banlist;
+ }
+ return found;
+}
+
+/**
+ * This function returns true if the user is banned on the said channel.
+ * This function will check the ban cache if applicable, otherwise will
+ * do the comparisons and cache the result.
+ *
+ * @param[in] member The Membership to test for banned-ness.
+ * @return Non-zero if the member is banned, zero if not.
+ */
+static int is_banned(struct Membership* member)
+{
+ if (IsBanValid(member))
+ return IsBanned(member);
+
+ SetBanValid(member);
+ if (find_ban(member->user, member->channel->banlist)) {
+ SetBanned(member);
+ return 1;
+ } else {
+ ClearBanned(member);
+ return 0;
+ }
+}
+
+/** add a user to a channel.
+ * adds a user to a channel by adding another link to the channels member
+ * chain.
+ *
+ * @param chptr The channel to add to.
+ * @param who The user to add.
+ * @param flags The flags the user gets initially.
+ * @param oplevel The oplevel the user starts with.
+ */
+void add_user_to_channel(struct Channel* chptr, struct Client* who,
+ unsigned int flags, int oplevel)
+{
+ assert(0 != chptr);
+ assert(0 != who);
+
+ if (cli_user(who)) {
+
+ struct Membership* member = membershipFreeList;
+ if (member)
+ membershipFreeList = member->next_member;
+ else {
+ member = (struct Membership*) MyMalloc(sizeof(struct Membership));
+ ++membershipAllocCount;
+ }
+
+ assert(0 != member);
+ member->user = who;
+ member->channel = chptr;
+ member->status = flags;
+ SetOpLevel(member, oplevel);
+
+ member->next_member = chptr->members;
+ if (member->next_member)
+ member->next_member->prev_member = member;
+ member->prev_member = 0;
+ chptr->members = member;
+
+ member->next_channel = (cli_user(who))->channel;
+ if (member->next_channel)
+ member->next_channel->prev_channel = member;
+ member->prev_channel = 0;
+ (cli_user(who))->channel = member;
+
+ if (chptr->destruct_event)
+ remove_destruct_event(chptr);
+ ++chptr->users;
+ ++((cli_user(who))->joined);
+ }
+}
+
+/** Remove a person from a channel, given their Membership*
+ *
+ * @param member A member of a channel.
+ *
+ * @returns true if there are more people in the channel.
+ */
+static int remove_member_from_channel(struct Membership* member)
+{
+ struct Channel* chptr;
+ assert(0 != member);
+ chptr = member->channel;
+ /*
+ * unlink channel member list
+ */
+ if (member->next_member)
+ member->next_member->prev_member = member->prev_member;
+ if (member->prev_member)
+ member->prev_member->next_member = member->next_member;
+ else
+ member->channel->members = member->next_member;
+
+ /*
+ * If this is the last delayed-join user, may have to clear WASDELJOINS.
+ */
+ if (IsDelayedJoin(member))
+ CheckDelayedJoins(chptr);
+
+ /*
+ * unlink client channel list
+ */
+ if (member->next_channel)
+ member->next_channel->prev_channel = member->prev_channel;
+ if (member->prev_channel)
+ member->prev_channel->next_channel = member->next_channel;
+ else
+ (cli_user(member->user))->channel = member->next_channel;
+
+ --(cli_user(member->user))->joined;
+
+ member->next_member = membershipFreeList;
+ membershipFreeList = member;
+
+ return sub1_from_channel(chptr);
+}
+
+/** Check if all the remaining members on the channel are zombies
+ *
+ * @returns False if the channel has any non zombie members, True otherwise.
+ * @see \ref zombie
+ */
+static int channel_all_zombies(struct Channel* chptr)
+{
+ struct Membership* member;
+
+ for (member = chptr->members; member; member = member->next_member) {
+ if (!IsZombie(member))
+ return 0;
+ }
+ return 1;
+}
+
+
+/** Remove a user from a channel
+ * This is the generic entry point for removing a user from a channel, this
+ * function will remove the client from the channel, and destroy the channel
+ * if there are no more normal users left.
+ *
+ * @param cptr The client
+ * @param chptr The channel
+ */
+void remove_user_from_channel(struct Client* cptr, struct Channel* chptr)
+{
+
+ struct Membership* member;
+ assert(0 != chptr);
+
+ if ((member = find_member_link(chptr, cptr))) {
+ if (remove_member_from_channel(member)) {
+ if (channel_all_zombies(chptr)) {
+ /*
+ * XXX - this looks dangerous but isn't if we got the referential
+ * integrity right for channels
+ */
+ while (remove_member_from_channel(chptr->members))
+ ;
+ }
+ }
+ }
+}
+
+/** Remove a user from all channels they are on.
+ *
+ * This function removes a user from all channels they are on.
+ *
+ * @param cptr The client to remove.
+ */
+void remove_user_from_all_channels(struct Client* cptr)
+{
+ struct Membership* chan;
+ assert(0 != cptr);
+ assert(0 != cli_user(cptr));
+
+ while ((chan = (cli_user(cptr))->channel))
+ remove_user_from_channel(cptr, chan->channel);
+}
+
+/** Check if this user is a legitimate chanop
+ *
+ * @param cptr Client to check
+ * @param chptr Channel to check
+ *
+ * @returns True if the user is a chanop (And not a zombie), False otherwise.
+ * @see \ref zombie
+ */
+int is_chan_op(struct Client *cptr, struct Channel *chptr)
+{
+ struct Membership* member;
+ assert(chptr);
+ if ((member = find_member_link(chptr, cptr)))
+ return (!IsZombie(member) && IsChanOp(member));
+
+ return 0;
+}
+
+/** Check if a user is a Zombie on a specific channel.
+ *
+ * @param cptr The client to check.
+ * @param chptr The channel to check.
+ *
+ * @returns True if the client (cptr) is a zombie on the channel (chptr),
+ * False otherwise.
+ *
+ * @see \ref zombie
+ */
+int is_zombie(struct Client *cptr, struct Channel *chptr)
+{
+ struct Membership* member;
+
+ assert(0 != chptr);
+
+ if ((member = find_member_link(chptr, cptr)))
+ return IsZombie(member);
+ return 0;
+}
+
+/** Returns if a user has voice on a channel.
+ *
+ * @param cptr The client
+ * @param chptr The channel
+ *
+ * @returns True if the client (cptr) is voiced on (chptr) and is not a zombie.
+ * @see \ref zombie
+ */
+int has_voice(struct Client* cptr, struct Channel* chptr)
+{
+ struct Membership* member;
+
+ assert(0 != chptr);
+ if ((member = find_member_link(chptr, cptr)))
+ return (!IsZombie(member) && HasVoice(member));
+
+ return 0;
+}
+
+/** Can this member send to a channel
+ *
+ * A user can speak on a channel iff:
+ * <ol>
+ * <li> They didn't use the Apass to gain ops.
+ * <li> They are op'd or voice'd.
+ * <li> You aren't banned.
+ * <li> The channel isn't +m
+ * <li> The channel isn't +n or you are on the channel.
+ * </ol>
+ *
+ * This function will optionally reveal a user on a delayed join channel if
+ * they are allowed to send to the channel.
+ *
+ * @param member The membership of the user
+ * @param reveal If true, the user will be "revealed" on a delayed
+ * joined channel.
+ *
+ * @returns True if the client can speak on the channel.
+ */
+int member_can_send_to_channel(struct Membership* member, int reveal)
+{
+ assert(0 != member);
+
+ /* Do not check for users on other servers: This should be a
+ * temporary desynch, or maybe they are on an older server, but
+ * we do not want to send ERR_CANNOTSENDTOCHAN more than once.
+ */
+ if (!MyUser(member->user))
+ {
+ if (IsDelayedJoin(member) && reveal)
+ RevealDelayedJoin(member);
+ return 1;
+ }
+
+ /* Discourage using the Apass to get op. They should use the Upass. */
+ if (IsChannelManager(member) && member->channel->mode.apass[0])
+ return 0;
+
+ /* If you have voice or ops, you can speak. */
+ if (IsVoicedOrOpped(member))
+ return 1;
+
+ /*
+ * If it's moderated, and you aren't a privileged user, you can't
+ * speak.
+ */
+ if (member->channel->mode.mode & MODE_MODERATED)
+ return 0;
+
+ /* If only logged in users may join and you're not one, you can't speak. */
+ if (member->channel->mode.mode & MODE_REGONLY && !IsAccount(member->user))
+ return 0;
+
+ /* If you're banned then you can't speak either. */
+ if (is_banned(member))
+ return 0;
+
+ if (IsDelayedJoin(member) && reveal)
+ RevealDelayedJoin(member);
+
+ return 1;
+}
+
+/** Check if a client can send to a channel.
+ *
+ * Has the added check over member_can_send_to_channel() of servers can
+ * always speak.
+ *
+ * @param cptr The client to check
+ * @param chptr The channel to check
+ * @param reveal If the user should be revealed (see
+ * member_can_send_to_channel())
+ *
+ * @returns true if the client is allowed to speak on the channel, false
+ * otherwise
+ *
+ * @see member_can_send_to_channel()
+ */
+int client_can_send_to_channel(struct Client *cptr, struct Channel *chptr, int reveal)
+{
+ struct Membership *member;
+ assert(0 != cptr);
+ /*
+ * Servers can always speak on channels.
+ */
+ if (IsServer(cptr))
+ return 1;
+
+ member = find_channel_member(cptr, chptr);
+
+ /*
+ * You can't speak if you're off channel, and it is +n (no external messages)
+ * or +m (moderated).
+ */
+ if (!member) {
+ if ((chptr->mode.mode & (MODE_NOPRIVMSGS|MODE_MODERATED)) ||
+ ((chptr->mode.mode & MODE_REGONLY) && !IsAccount(cptr)))
+ return 0;
+ else
+ return !find_ban(cptr, chptr->banlist);
+ }
+ return member_can_send_to_channel(member, reveal);
+}
+
+/** Returns the name of a channel that prevents the user from changing nick.
+ * if a member and not (opped or voiced) and (banned or moderated), return
+ * the name of the first channel banned on.
+ *
+ * @param cptr The client
+ *
+ * @returns the name of the first channel banned on, or NULL if the user
+ * can change nicks.
+ */
+const char* find_no_nickchange_channel(struct Client* cptr)
+{
+ if (MyUser(cptr)) {
+ struct Membership* member;
+ for (member = (cli_user(cptr))->channel; member;
+ member = member->next_channel) {
+ if (IsVoicedOrOpped(member))
+ continue;
+ if ((member->channel->mode.mode & MODE_MODERATED)
+ || (member->channel->mode.mode & MODE_REGONLY && !IsAccount(cptr))
+ || is_banned(member))
+ return member->channel->chname;
+ }
+ }
+ return 0;
+}
+
+
+/** Fill mbuf/pbuf with modes from chptr
+ * write the "simple" list of channel modes for channel chptr onto buffer mbuf
+ * with the parameters in pbuf as visible by cptr.
+ *
+ * This function will hide keys from non-op'd, non-server clients.
+ *
+ * @param cptr The client to generate the mode for.
+ * @param mbuf The buffer to write the modes into.
+ * @param pbuf The buffer to write the mode parameters into.
+ * @param buflen The length of the buffers.
+ * @param chptr The channel to get the modes from.
+ * @param member The membership of this client on this channel (or NULL
+ * if this client isn't on this channel)
+ *
+ */
+void channel_modes(struct Client *cptr, char *mbuf, char *pbuf, int buflen,
+ struct Channel *chptr, struct Membership *member)
+{
+ int previous_parameter = 0;
+
+ assert(0 != mbuf);
+ assert(0 != pbuf);
+ assert(0 != chptr);
+
+ *mbuf++ = '+';
+ if (chptr->mode.mode & MODE_SECRET)
+ *mbuf++ = 's';
+ else if (chptr->mode.mode & MODE_PRIVATE)
+ *mbuf++ = 'p';
+ if (chptr->mode.mode & MODE_MODERATED)
+ *mbuf++ = 'm';
+ if (chptr->mode.mode & MODE_TOPICLIMIT)
+ *mbuf++ = 't';
+ if (chptr->mode.mode & MODE_INVITEONLY)
+ *mbuf++ = 'i';
+ if (chptr->mode.mode & MODE_NOPRIVMSGS)
+ *mbuf++ = 'n';
+ if (chptr->mode.mode & MODE_REGONLY)
+ *mbuf++ = 'r';
+ if (chptr->mode.mode & MODE_DELJOINS)
+ *mbuf++ = 'D';
+ else if (MyUser(cptr) && (chptr->mode.mode & MODE_WASDELJOINS))
+ *mbuf++ = 'd';
+ if (chptr->mode.mode & MODE_REGISTERED)
+ *mbuf++ = 'R';
+ if (chptr->mode.limit) {
+ *mbuf++ = 'l';
+ ircd_snprintf(0, pbuf, buflen, "%u", chptr->mode.limit);
+ previous_parameter = 1;
+ }
+
+ if (*chptr->mode.key) {
+ *mbuf++ = 'k';
+ if (previous_parameter)
+ strcat(pbuf, " ");
+ if (is_chan_op(cptr, chptr) || IsServer(cptr)) {
+ strcat(pbuf, chptr->mode.key);
+ } else
+ strcat(pbuf, "*");
+ previous_parameter = 1;
+ }
+ if (*chptr->mode.apass) {
+ *mbuf++ = 'A';
+ if (previous_parameter)
+ strcat(pbuf, " ");
+ if (IsServer(cptr)) {
+ strcat(pbuf, chptr->mode.apass);
+ } else
+ strcat(pbuf, "*");
+ previous_parameter = 1;
+ }
+ if (*chptr->mode.upass) {
+ *mbuf++ = 'U';
+ if (previous_parameter)
+ strcat(pbuf, " ");
+ if (IsServer(cptr) || (member && IsChanOp(member) && OpLevel(member) == 0)) {
+ strcat(pbuf, chptr->mode.upass);
+ } else
+ strcat(pbuf, "*");
+ }
+ *mbuf = '\0';
+}
+
+/** Compare two members oplevel
+ *
+ * @param mp1 Pointer to a pointer to a membership
+ * @param mp2 Pointer to a pointer to a membership
+ *
+ * @returns 0 if equal, -1 if mp1 is lower, +1 otherwise.
+ *
+ * Used for qsort(3).
+ */
+int compare_member_oplevel(const void *mp1, const void *mp2)
+{
+ struct Membership const* member1 = *(struct Membership const**)mp1;
+ struct Membership const* member2 = *(struct Membership const**)mp2;
+ if (member1->oplevel == member2->oplevel)
+ return 0;
+ return (member1->oplevel < member2->oplevel) ? -1 : 1;
+}
+
+/* send "cptr" a full list of the modes for channel chptr.
+ *
+ * Sends a BURST line to cptr, bursting all the modes for the channel.
+ *
+ * @param cptr Client pointer
+ * @param chptr Channel pointer
+ */
+void send_channel_modes(struct Client *cptr, struct Channel *chptr)
+{
+ /* The order in which modes are generated is now mandatory */
+ static unsigned int current_flags[4] =
+ { 0, CHFL_VOICE, CHFL_CHANOP, CHFL_CHANOP | CHFL_VOICE };
+ int first = 1;
+ int full = 1;
+ int flag_cnt = 0;
+ int new_mode = 0;
+ size_t len;
+ struct Membership* member;
+ struct Ban* lp2;
+ char modebuf[MODEBUFLEN];
+ char parabuf[MODEBUFLEN];
+ struct MsgBuf *mb;
+ int number_of_ops = 0;
+ int opped_members_index = 0;
+ struct Membership** opped_members = NULL;
+ int last_oplevel = 0;
+ int send_oplevels = 0;
+
+ assert(0 != cptr);
+ assert(0 != chptr);
+
+ if (IsLocalChannel(chptr->chname))
+ return;
+
+ member = chptr->members;
+ lp2 = chptr->banlist;
+
+ *modebuf = *parabuf = '\0';
+ channel_modes(cptr, modebuf, parabuf, sizeof(parabuf), chptr, 0);
+
+ for (first = 1; full; first = 0) /* Loop for multiple messages */
+ {
+ full = 0; /* Assume by default we get it
+ all in one message */
+
+ /* (Continued) prefix: "<Y> B <channel> <TS>" */
+ /* is there any better way we can do this? */
+ mb = msgq_make(&me, "%C " TOK_BURST " %H %Tu", &me, chptr,
+ chptr->creationtime);
+
+ if (first && modebuf[1]) /* Add simple modes (Aiklmnpstu)
+ if first message */
+ {
+ /* prefix: "<Y> B <channel> <TS>[ <modes>[ <params>]]" */
+ msgq_append(&me, mb, " %s", modebuf);
+
+ if (*parabuf)
+ msgq_append(&me, mb, " %s", parabuf);
+ }
+
+ /*
+ * Attach nicks, comma separated " nick[:modes],nick[:modes],..."
+ *
+ * First find all opless members.
+ * Run 2 times over all members, to group the members with
+ * and without voice together.
+ * Then run 2 times over all opped members (which are ordered
+ * by op-level) to also group voice and non-voice together.
+ */
+ for (first = 1; flag_cnt < 4; new_mode = 1, ++flag_cnt)
+ {
+ while (member)
+ {
+ if (flag_cnt < 2 && IsChanOp(member))
+ {
+ /*
+ * The first loop (to find all non-voice/op), we count the ops.
+ * The second loop (to find all voiced non-ops), store the ops
+ * in a dynamic array.
+ */
+ if (flag_cnt == 0)
+ ++number_of_ops;
+ else
+ opped_members[opped_members_index++] = member;
+ /* We also send oplevels if anyone is below the weakest level. */
+ if (OpLevel(member) < MAXOPLEVEL)
+ send_oplevels = 1;
+ }
+ /* Only handle the members with the flags that we are interested in. */
+ if ((member->status & CHFL_VOICED_OR_OPPED) == current_flags[flag_cnt])
+ {
+ if (msgq_bufleft(mb) < NUMNICKLEN + 3 + MAXOPLEVELDIGITS)
+ /* The 3 + MAXOPLEVELDIGITS is a possible ",:v999". */
+ {
+ full = 1; /* Make sure we continue after
+ sending it so far */
+ /* Ensure the new BURST line contains the current
+ * ":mode", except when there is no mode yet. */
+ new_mode = (flag_cnt > 0) ? 1 : 0;
+ break; /* Do not add this member to this message */
+ }
+ msgq_append(&me, mb, "%c%C", first ? ' ' : ',', member->user);
+ first = 0; /* From now on, use commas to add new nicks */
+
+ /*
+ * Do we have a nick with a new mode ?
+ * Or are we starting a new BURST line?
+ */
+ if (new_mode)
+ {
+ /*
+ * This means we are at the _first_ member that has only
+ * voice, or the first member that has only ops, or the
+ * first member that has voice and ops (so we get here
+ * at most three times, plus once for every start of
+ * a continued BURST line where only these modes is current.
+ * In the two cases where the current mode includes ops,
+ * we need to add the _absolute_ value of the oplevel to the mode.
+ */
+ char tbuf[3 + MAXOPLEVELDIGITS] = ":";
+ int loc = 1;
+
+ if (HasVoice(member)) /* flag_cnt == 1 or 3 */
+ tbuf[loc++] = 'v';
+ if (IsChanOp(member)) /* flag_cnt == 2 or 3 */
+ {
+ /* append the absolute value of the oplevel */
+ if (send_oplevels)
+ loc += ircd_snprintf(0, tbuf + loc, sizeof(tbuf) - loc, "%u", last_oplevel = member->oplevel);
+ else
+ tbuf[loc++] = 'o';
+ }
+ tbuf[loc] = '\0';
+ msgq_append(&me, mb, tbuf);
+ new_mode = 0;
+ }
+ else if (send_oplevels && flag_cnt > 1 && last_oplevel != member->oplevel)
+ {
+ /*
+ * This can't be the first member of a (continued) BURST
+ * message because then either flag_cnt == 0 or new_mode == 1
+ * Now we need to append the incremental value of the oplevel.
+ */
+ char tbuf[2 + MAXOPLEVELDIGITS];
+ ircd_snprintf(0, tbuf, sizeof(tbuf), ":%u", member->oplevel - last_oplevel);
+ last_oplevel = member->oplevel;
+ msgq_append(&me, mb, tbuf);
+ }
+ }
+ /* Go to the next `member'. */
+ if (flag_cnt < 2)
+ member = member->next_member;
+ else
+ member = opped_members[++opped_members_index];
+ }
+ if (full)
+ break;
+
+ /* Point `member' at the start of the list again. */
+ if (flag_cnt == 0)
+ {
+ member = chptr->members;
+ /* Now, after one loop, we know the number of ops and can
+ * allocate the dynamic array with pointer to the ops. */
+ opped_members = (struct Membership**)
+ MyMalloc((number_of_ops + 1) * sizeof(struct Membership*));
+ opped_members[number_of_ops] = NULL; /* Needed for loop termination */
+ }
+ else
+ {
+ /* At the end of the second loop, sort the opped members with
+ * increasing op-level, so that we will output them in the
+ * correct order (and all op-level increments stay positive) */
+ if (flag_cnt == 1)
+ qsort(opped_members, number_of_ops,
+ sizeof(struct Membership*), compare_member_oplevel);
+ /* The third and fourth loop run only over the opped members. */
+ member = opped_members[(opped_members_index = 0)];
+ }
+
+ } /* loop over 0,+v,+o,+ov */
+
+ if (!full)
+ {
+ /* Attach all bans, space separated " :%ban ban ..." */
+ for (first = 2; lp2; lp2 = lp2->next)
+ {
+ len = strlen(lp2->banstr);
+ if (msgq_bufleft(mb) < len + 1 + first)
+ /* The +1 stands for the added ' '.
+ * The +first stands for the added ":%".
+ */
+ {
+ full = 1;
+ break;
+ }
+ msgq_append(&me, mb, " %s%s", first ? ":%" : "",
+ lp2->banstr);
+ first = 0;
+ }
+ }
+
+ send_buffer(cptr, mb, 0); /* Send this message */
+ msgq_clean(mb);
+ } /* Continue when there was something
+ that didn't fit (full==1) */
+ if (opped_members)
+ MyFree(opped_members);
+ if (feature_bool(FEAT_TOPIC_BURST) && (chptr->topic[0] != '\0'))
+ sendcmdto_one(&me, CMD_TOPIC, cptr, "%H %Tu %Tu :%s", chptr,
+ chptr->creationtime, chptr->topic_time, chptr->topic);
+}
+
+/** Canonify a mask.
+ * pretty_mask
+ *
+ * @author Carlo Wood (Run),
+ * 05 Oct 1998.
+ *
+ * When the nick is longer then NICKLEN, it is cut off (its an error of course).
+ * When the user name or host name are too long (USERLEN and HOSTLEN
+ * respectively) then they are cut off at the start with a '*'.
+ *
+ * The following transformations are made:
+ *
+ * 1) xxx -> nick!*@*
+ * 2) xxx.xxx -> *!*\@host
+ * 3) xxx\!yyy -> nick!user\@*
+ * 4) xxx\@yyy -> *!user\@host
+ * 5) xxx!yyy\@zzz -> nick!user\@host
+ *
+ * @param mask The uncanonified mask.
+ * @returns The updated mask in a static buffer.
+ */
+char *pretty_mask(char *mask)
+{
+ static char star[2] = { '*', 0 };
+ static char retmask[NICKLEN + USERLEN + HOSTLEN + 3];
+ char *last_dot = NULL;
+ char *ptr;
+
+ /* Case 1: default */
+ char *nick = mask;
+ char *user = star;
+ char *host = star;
+
+ /* Do a _single_ pass through the characters of the mask: */
+ for (ptr = mask; *ptr; ++ptr)
+ {
+ if (*ptr == '!')
+ {
+ /* Case 3 or 5: Found first '!' (without finding a '@' yet) */
+ user = ++ptr;
+ host = star;
+ }
+ else if (*ptr == '@')
+ {
+ /* Case 4: Found last '@' (without finding a '!' yet) */
+ nick = star;
+ user = mask;
+ host = ++ptr;
+ }
+ else if (*ptr == '.' || *ptr == ':')
+ {
+ /* Case 2: Found character specific to IP or hostname (without
+ * finding a '!' or '@' yet) */
+ last_dot = ptr;
+ continue;
+ }
+ else
+ continue;
+ for (; *ptr; ++ptr)
+ {
+ if (*ptr == '@')
+ {
+ /* Case 4 or 5: Found last '@' */
+ host = ptr + 1;
+ }
+ }
+ break;
+ }
+ if (user == star && last_dot)
+ {
+ /* Case 2: */
+ nick = star;
+ user = star;
+ host = mask;
+ }
+ /* Check lengths */
+ if (nick != star)
+ {
+ char *nick_end = (user != star) ? user - 1 : ptr;
+ if (nick_end - nick > NICKLEN)
+ nick[NICKLEN] = 0;
+ *nick_end = 0;
+ }
+ if (user != star)
+ {
+ char *user_end = (host != star) ? host - 1 : ptr;
+ if (user_end - user > USERLEN)
+ {
+ user = user_end - USERLEN;
+ *user = '*';
+ }
+ *user_end = 0;
+ }
+ if (host != star && ptr - host > HOSTLEN)
+ {
+ host = ptr - HOSTLEN;
+ *host = '*';
+ }
+ ircd_snprintf(0, retmask, sizeof(retmask), "%s!%s@%s", nick, user, host);
+ return retmask;
+}
+
+/** send a banlist to a client for a channel
+ *
+ * @param cptr Client to send the banlist to.
+ * @param chptr Channel whose banlist to send.
+ */
+static void send_ban_list(struct Client* cptr, struct Channel* chptr)
+{
+ struct Ban* lp;
+
+ assert(0 != cptr);
+ assert(0 != chptr);
+
+ for (lp = chptr->banlist; lp; lp = lp->next)
+ send_reply(cptr, RPL_BANLIST, chptr->chname, lp->banstr,
+ lp->who, lp->when);
+
+ send_reply(cptr, RPL_ENDOFBANLIST, chptr->chname);
+}
+
+/** Get a channel block, creating if necessary.
+ * Get Channel block for chname (and allocate a new channel
+ * block, if it didn't exists before).
+ *
+ * @param cptr Client joining the channel.
+ * @param chname The name of the channel to join.
+ * @param flag set to CGT_CREATE to create the channel if it doesn't
+ * exist
+ *
+ * @returns NULL if the channel is invalid, doesn't exist and CGT_CREATE
+ * wasn't specified or a pointer to the channel structure
+ */
+struct Channel *get_channel(struct Client *cptr, char *chname, ChannelGetType flag)
+{
+ struct Channel *chptr;
+ int len;
+
+ if (EmptyString(chname))
+ return NULL;
+
+ len = strlen(chname);
+ if (MyUser(cptr) && len > CHANNELLEN)
+ {
+ len = CHANNELLEN;
+ *(chname + CHANNELLEN) = '\0';
+ }
+ if ((chptr = FindChannel(chname)))
+ return (chptr);
+ if (flag == CGT_CREATE)
+ {
+ chptr = (struct Channel*) MyMalloc(sizeof(struct Channel) + len);
+ assert(0 != chptr);
+ ++UserStats.channels;
+ memset(chptr, 0, sizeof(struct Channel));
+ strcpy(chptr->chname, chname);
+ if (GlobalChannelList)
+ GlobalChannelList->prev = chptr;
+ chptr->prev = NULL;
+ chptr->next = GlobalChannelList;
+ chptr->creationtime = MyUser(cptr) ? TStime() : (time_t) 0;
+ GlobalChannelList = chptr;
+ hAddChannel(chptr);
+ }
+ return chptr;
+}
+
+/** invite a user to a channel.
+ *
+ * Adds an invite for a user to a channel. Limits the number of invites
+ * to FEAT_MAXCHANNELSPERUSER. Does not sent notification to the user.
+ *
+ * @param cptr The client to be invited.
+ * @param chptr The channel to be invited to.
+ */
+void add_invite(struct Client *cptr, struct Channel *chptr)
+{
+ struct SLink *inv, **tmp;
+
+ del_invite(cptr, chptr);
+ /*
+ * Delete last link in chain if the list is max length
+ */
+ assert(list_length((cli_user(cptr))->invited) == (cli_user(cptr))->invites);
+ if ((cli_user(cptr))->invites >= feature_int(FEAT_MAXCHANNELSPERUSER))
+ del_invite(cptr, (cli_user(cptr))->invited->value.chptr);
+ /*
+ * Add client to channel invite list
+ */
+ inv = make_link();
+ inv->value.cptr = cptr;
+ inv->next = chptr->invites;
+ chptr->invites = inv;
+ /*
+ * Add channel to the end of the client invite list
+ */
+ for (tmp = &((cli_user(cptr))->invited); *tmp; tmp = &((*tmp)->next));
+ inv = make_link();
+ inv->value.chptr = chptr;
+ inv->next = NULL;
+ (*tmp) = inv;
+ (cli_user(cptr))->invites++;
+}
+
+/** Delete an invite
+ * Delete Invite block from channel invite list and client invite list
+ *
+ * @param cptr Client pointer
+ * @param chptr Channel pointer
+ */
+void del_invite(struct Client *cptr, struct Channel *chptr)
+{
+ struct SLink **inv, *tmp;
+
+ for (inv = &(chptr->invites); (tmp = *inv); inv = &tmp->next)
+ if (tmp->value.cptr == cptr)
+ {
+ *inv = tmp->next;
+ free_link(tmp);
+ tmp = 0;
+ (cli_user(cptr))->invites--;
+ break;
+ }
+
+ for (inv = &((cli_user(cptr))->invited); (tmp = *inv); inv = &tmp->next)
+ if (tmp->value.chptr == chptr)
+ {
+ *inv = tmp->next;
+ free_link(tmp);
+ tmp = 0;
+ break;
+ }
+}
+
+/** @page zombie Explanation of Zombies
+ *
+ * Synopsis:
+ *
+ * A channel member is turned into a zombie when he is kicked from a
+ * channel but his server has not acknowledged the kick. Servers that
+ * see the member as a zombie can accept actions he performed before
+ * being kicked, without allowing chanop operations from outsiders or
+ * desyncing the network.
+ *
+ * Consider:
+ * <pre>
+ * client
+ * |
+ * c
+ * |
+ * X --a--> A --b--> B --d--> D
+ * |
+ * who
+ * </pre>
+ *
+ * Where `who' is being KICK-ed by a "KICK" message received by server 'A'
+ * via 'a', or on server 'B' via either 'b' or 'c', or on server D via 'd'.
+ *
+ * a) On server A : set CHFL_ZOMBIE for `who' (lp) and pass on the KICK.
+ * Remove the user immediately when no users are left on the channel.
+ * b) On server B : remove the user (who/lp) from the channel, send a
+ * PART upstream (to A) and pass on the KICK.
+ * c) KICKed by `client'; On server B : remove the user (who/lp) from the
+ * channel, and pass on the KICK.
+ * d) On server D : remove the user (who/lp) from the channel, and pass on
+ * the KICK.
+ *
+ * Note:
+ * - Setting the ZOMBIE flag never hurts, we either remove the
+ * client after that or we don't.
+ * - The KICK message was already passed on, as should be in all cases.
+ * - `who' is removed in all cases except case a) when users are left.
+ * - A PART is only sent upstream in case b).
+ *
+ * 2 aug 97:
+ * <pre>
+ * 6
+ * |
+ * 1 --- 2 --- 3 --- 4 --- 5
+ * | |
+ * kicker who
+ * </pre>
+ *
+ * We also need to turn 'who' into a zombie on servers 1 and 6,
+ * because a KICK from 'who' (kicking someone else in that direction)
+ * can arrive there afterward - which should not be bounced itself.
+ * Therefore case a) also applies for servers 1 and 6.
+ *
+ * --Run
+ */
+
+/** Turn a user on a channel into a zombie
+ * This function turns a user into a zombie (see \ref zombie)
+ *
+ * @param member The structure representing this user on this channel.
+ * @param who The client that is being kicked.
+ * @param cptr The connection the kick came from.
+ * @param sptr The client that is doing the kicking.
+ * @param chptr The channel the user is being kicked from.
+ */
+void make_zombie(struct Membership* member, struct Client* who,
+ struct Client* cptr, struct Client* sptr, struct Channel* chptr)
+{
+ assert(0 != member);
+ assert(0 != who);
+ assert(0 != cptr);
+ assert(0 != chptr);
+
+ /* Default for case a): */
+ SetZombie(member);
+
+ /* Case b) or c) ?: */
+ if (MyUser(who)) /* server 4 */
+ {
+ if (IsServer(cptr)) /* Case b) ? */
+ sendcmdto_one(who, CMD_PART, cptr, "%H", chptr);
+ remove_user_from_channel(who, chptr);
+ return;
+ }
+ if (cli_from(who) == cptr) /* True on servers 1, 5 and 6 */
+ {
+ struct Client *acptr = IsServer(sptr) ? sptr : (cli_user(sptr))->server;
+ for (; acptr != &me; acptr = (cli_serv(acptr))->up)
+ if (acptr == (cli_user(who))->server) /* Case d) (server 5) */
+ {
+ remove_user_from_channel(who, chptr);
+ return;
+ }
+ }
+
+ /* Case a) (servers 1, 2, 3 and 6) */
+ if (channel_all_zombies(chptr))
+ remove_user_from_channel(who, chptr);
+
+ /* XXX Can't actually call Debug here; if the channel is all zombies,
+ * chptr will no longer exist when we get here.
+ Debug((DEBUG_INFO, "%s is now a zombie on %s", who->name, chptr->chname));
+ */
+}
+
+/** returns the number of zombies on a channel
+ * @param chptr Channel to count zombies in.
+ *
+ * @returns The number of zombies on the channel.
+ */
+int number_of_zombies(struct Channel *chptr)
+{
+ struct Membership* member;
+ int count = 0;
+
+ assert(0 != chptr);
+ for (member = chptr->members; member; member = member->next_member) {
+ if (IsZombie(member))
+ ++count;
+ }
+ return count;
+}
+
+/** Concatenate some strings together.
+ * This helper function builds an argument string in strptr, consisting
+ * of the original string, a space, and str1 and str2 concatenated (if,
+ * of course, str2 is not NULL)
+ *
+ * @param strptr The buffer to concatenate into
+ * @param strptr_i modified offset to the position to modify
+ * @param str1 The string to concatenate from.
+ * @param str2 The second string to contatenate from.
+ * @param c Charactor to separate the string from str1 and str2.
+ */
+static void
+build_string(char *strptr, int *strptr_i, const char *str1,
+ const char *str2, char c)
+{
+ if (c)
+ strptr[(*strptr_i)++] = c;
+
+ while (*str1)
+ strptr[(*strptr_i)++] = *(str1++);
+
+ if (str2)
+ while (*str2)
+ strptr[(*strptr_i)++] = *(str2++);
+
+ strptr[(*strptr_i)] = '\0';
+}
+
+/** Check a channel for join-delayed members.
+ * @param[in] chan Channel to search.
+ * @return Non-zero if any members are join-delayed; false if none are.
+ */
+static int
+find_delayed_joins(const struct Channel *chan)
+{
+ const struct Membership *memb;
+ for (memb = chan->members; memb; memb = memb->next_member)
+ if (IsDelayedJoin(memb))
+ return 1;
+ return 0;
+}
+
+/** Flush out the modes
+ * This is the workhorse of our ModeBuf suite; this actually generates the
+ * output MODE commands, HACK notices, or whatever. It's pretty complicated.
+ *
+ * @param mbuf The mode buffer to flush
+ * @param all If true, flush all modes, otherwise leave partial modes in the
+ * buffer.
+ *
+ * @returns 0
+ */
+static int
+modebuf_flush_int(struct ModeBuf *mbuf, int all)
+{
+ /* we only need the flags that don't take args right now */
+ static int flags[] = {
+/* MODE_CHANOP, 'o', */
+/* MODE_VOICE, 'v', */
+ MODE_PRIVATE, 'p',
+ MODE_SECRET, 's',
+ MODE_MODERATED, 'm',
+ MODE_TOPICLIMIT, 't',
+ MODE_INVITEONLY, 'i',
+ MODE_NOPRIVMSGS, 'n',
+ MODE_REGONLY, 'r',
+ MODE_DELJOINS, 'D',
+ MODE_REGISTERED, 'R',
+/* MODE_KEY, 'k', */
+/* MODE_BAN, 'b', */
+ MODE_LIMIT, 'l',
+/* MODE_APASS, 'A', */
+/* MODE_UPASS, 'U', */
+ 0x0, 0x0
+ };
+ static int local_flags[] = {
+ MODE_WASDELJOINS, 'd',
+ 0x0, 0x0
+ };
+ int i;
+ int *flag_p;
+
+ struct Client *app_source; /* where the MODE appears to come from */
+
+ char addbuf[20], addbuf_local[20]; /* accumulates +psmtin, etc. */
+ int addbuf_i = 0, addbuf_local_i = 0;
+ char rembuf[20], rembuf_local[20]; /* accumulates -psmtin, etc. */
+ int rembuf_i = 0, rembuf_local_i = 0;
+ char *bufptr; /* we make use of indirection to simplify the code */
+ int *bufptr_i;
+
+ char addstr[BUFSIZE]; /* accumulates MODE parameters to add */
+ int addstr_i;
+ char remstr[BUFSIZE]; /* accumulates MODE parameters to remove */
+ int remstr_i;
+ char *strptr; /* more indirection to simplify the code */
+ int *strptr_i;
+
+ int totalbuflen = BUFSIZE - 200; /* fuzz factor -- don't overrun buffer! */
+ int tmp;
+
+ char limitbuf[20]; /* convert limits to strings */
+
+ unsigned int limitdel = MODE_LIMIT;
+
+ assert(0 != mbuf);
+
+ /* If the ModeBuf is empty, we have nothing to do */
+ if (mbuf->mb_add == 0 && mbuf->mb_rem == 0 && mbuf->mb_count == 0)
+ return 0;
+
+ /* Ok, if we were given the OPMODE flag, or its a server, hide the source.
+ */
+ if (feature_bool(FEAT_HIS_MODEWHO) &&
+ (mbuf->mb_dest & MODEBUF_DEST_OPMODE ||
+ IsServer(mbuf->mb_source) ||
+ IsMe(mbuf->mb_source)))
+ app_source = &his;
+ else
+ app_source = mbuf->mb_source;
+
+ /* Must be set if going -D and some clients are hidden */
+ if ((mbuf->mb_rem & MODE_DELJOINS)
+ && !(mbuf->mb_channel->mode.mode & (MODE_DELJOINS | MODE_WASDELJOINS))
+ && find_delayed_joins(mbuf->mb_channel)) {
+ mbuf->mb_channel->mode.mode |= MODE_WASDELJOINS;
+ mbuf->mb_add |= MODE_WASDELJOINS;
+ mbuf->mb_rem &= ~MODE_WASDELJOINS;
+ }
+
+ /* +d must be cleared if +D is set */
+ if ((mbuf->mb_add & MODE_DELJOINS)
+ && (mbuf->mb_channel->mode.mode & MODE_WASDELJOINS)) {
+ mbuf->mb_channel->mode.mode &= ~MODE_WASDELJOINS;
+ mbuf->mb_add &= ~MODE_WASDELJOINS;
+ mbuf->mb_rem |= MODE_WASDELJOINS;
+ }
+
+ /*
+ * Account for user we're bouncing; we have to get it in on the first
+ * bounced MODE, or we could have problems
+ */
+ if (mbuf->mb_dest & MODEBUF_DEST_DEOP)
+ totalbuflen -= 6; /* numeric nick == 5, plus one space */
+
+ /* Calculate the simple flags */
+ for (flag_p = flags; flag_p[0]; flag_p += 2) {
+ if (*flag_p & mbuf->mb_add)
+ addbuf[addbuf_i++] = flag_p[1];
+ else if (*flag_p & mbuf->mb_rem)
+ rembuf[rembuf_i++] = flag_p[1];
+ }
+
+ /* Some flags may be for local display only. */
+ for (flag_p = local_flags; flag_p[0]; flag_p += 2) {
+ if (*flag_p & mbuf->mb_add)
+ addbuf_local[addbuf_local_i++] = flag_p[1];
+ else if (*flag_p & mbuf->mb_rem)
+ rembuf_local[rembuf_local_i++] = flag_p[1];
+ }
+
+ /* Now go through the modes with arguments... */
+ for (i = 0; i < mbuf->mb_count; i++) {
+ if (MB_TYPE(mbuf, i) & MODE_ADD) { /* adding or removing? */
+ bufptr = addbuf;
+ bufptr_i = &addbuf_i;
+ } else {
+ bufptr = rembuf;
+ bufptr_i = &rembuf_i;
+ }
+
+ if (MB_TYPE(mbuf, i) & (MODE_CHANOP | MODE_VOICE)) {
+ tmp = strlen(cli_name(MB_CLIENT(mbuf, i)));
+
+ if ((totalbuflen - IRCD_MAX(9, tmp)) <= 0) /* don't overflow buffer */
+ MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
+ else {
+ bufptr[(*bufptr_i)++] = MB_TYPE(mbuf, i) & MODE_CHANOP ? 'o' : 'v';
+ totalbuflen -= IRCD_MAX(9, tmp) + 1;
+ }
+ } else if (MB_TYPE(mbuf, i) & (MODE_BAN | MODE_APASS | MODE_UPASS)) {
+ tmp = strlen(MB_STRING(mbuf, i));
+
+ if ((totalbuflen - tmp) <= 0) /* don't overflow buffer */
+ MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
+ else {
+ char mode_char;
+ switch(MB_TYPE(mbuf, i) & (MODE_BAN | MODE_APASS | MODE_UPASS))
+ {
+ case MODE_APASS:
+ mode_char = 'A';
+ break;
+ case MODE_UPASS:
+ mode_char = 'U';
+ break;
+ default:
+ mode_char = 'b';
+ break;
+ }
+ bufptr[(*bufptr_i)++] = mode_char;
+ totalbuflen -= tmp + 1;
+ }
+ } else if (MB_TYPE(mbuf, i) & MODE_KEY) {
+ tmp = (mbuf->mb_dest & MODEBUF_DEST_NOKEY ? 1 :
+ strlen(MB_STRING(mbuf, i)));
+
+ if ((totalbuflen - tmp) <= 0) /* don't overflow buffer */
+ MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
+ else {
+ bufptr[(*bufptr_i)++] = 'k';
+ totalbuflen -= tmp + 1;
+ }
+ } else if (MB_TYPE(mbuf, i) & MODE_LIMIT) {
+ /* if it's a limit, we also format the number */
+ ircd_snprintf(0, limitbuf, sizeof(limitbuf), "%u", MB_UINT(mbuf, i));
+
+ tmp = strlen(limitbuf);
+
+ if ((totalbuflen - tmp) <= 0) /* don't overflow buffer */
+ MB_TYPE(mbuf, i) |= MODE_SAVE; /* save for later */
+ else {
+ bufptr[(*bufptr_i)++] = 'l';
+ totalbuflen -= tmp + 1;
+ }
+ }
+ }
+
+ /* terminate the mode strings */
+ addbuf[addbuf_i] = '\0';
+ rembuf[rembuf_i] = '\0';
+ addbuf_local[addbuf_local_i] = '\0';
+ rembuf_local[rembuf_local_i] = '\0';
+
+ /* If we're building a user visible MODE or HACK... */
+ if (mbuf->mb_dest & (MODEBUF_DEST_CHANNEL | MODEBUF_DEST_HACK2 |
+ MODEBUF_DEST_HACK3 | MODEBUF_DEST_HACK4 |
+ MODEBUF_DEST_LOG)) {
+ /* Set up the parameter strings */
+ addstr[0] = '\0';
+ addstr_i = 0;
+ remstr[0] = '\0';
+ remstr_i = 0;
+
+ for (i = 0; i < mbuf->mb_count; i++) {
+ if (MB_TYPE(mbuf, i) & MODE_SAVE)
+ continue;
+
+ if (MB_TYPE(mbuf, i) & MODE_ADD) { /* adding or removing? */
+ strptr = addstr;
+ strptr_i = &addstr_i;
+ } else {
+ strptr = remstr;
+ strptr_i = &remstr_i;
+ }
+
+ /* deal with clients... */
+ if (MB_TYPE(mbuf, i) & (MODE_CHANOP | MODE_VOICE))
+ build_string(strptr, strptr_i, cli_name(MB_CLIENT(mbuf, i)), 0, ' ');
+
+ /* deal with bans... */
+ else if (MB_TYPE(mbuf, i) & MODE_BAN)
+ build_string(strptr, strptr_i, MB_STRING(mbuf, i), 0, ' ');
+
+ /* deal with keys... */
+ else if (MB_TYPE(mbuf, i) & MODE_KEY)
+ build_string(strptr, strptr_i, mbuf->mb_dest & MODEBUF_DEST_NOKEY ?
+ "*" : MB_STRING(mbuf, i), 0, ' ');
+
+ /* deal with invisible passwords */
+ else if (MB_TYPE(mbuf, i) & (MODE_APASS | MODE_UPASS))
+ build_string(strptr, strptr_i, "*", 0, ' ');
+
+ /*
+ * deal with limit; note we cannot include the limit parameter if we're
+ * removing it
+ */
+ else if ((MB_TYPE(mbuf, i) & (MODE_ADD | MODE_LIMIT)) ==
+ (MODE_ADD | MODE_LIMIT))
+ build_string(strptr, strptr_i, limitbuf, 0, ' ');
+ }
+
+ /* send the messages off to their destination */
+ if (mbuf->mb_dest & MODEBUF_DEST_HACK2)
+ sendto_opmask_butone(0, SNO_HACK2, "HACK(2): %s MODE %s %s%s%s%s%s%s "
+ "[%Tu]",
+ cli_name(feature_bool(FEAT_HIS_SNOTICES) ?
+ mbuf->mb_source : app_source),
+ mbuf->mb_channel->chname,
+ rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
+ addbuf, remstr, addstr,
+ mbuf->mb_channel->creationtime);
+
+ if (mbuf->mb_dest & MODEBUF_DEST_HACK3)
+ sendto_opmask_butone(0, SNO_HACK3, "BOUNCE or HACK(3): %s MODE %s "
+ "%s%s%s%s%s%s [%Tu]",
+ cli_name(feature_bool(FEAT_HIS_SNOTICES) ?
+ mbuf->mb_source : app_source),
+ mbuf->mb_channel->chname, rembuf_i ? "-" : "",
+ rembuf, addbuf_i ? "+" : "", addbuf, remstr, addstr,
+ mbuf->mb_channel->creationtime);
+
+ if (mbuf->mb_dest & MODEBUF_DEST_HACK4)
+ sendto_opmask_butone(0, SNO_HACK4, "HACK(4): %s MODE %s %s%s%s%s%s%s "
+ "[%Tu]",
+ cli_name(feature_bool(FEAT_HIS_SNOTICES) ?
+ mbuf->mb_source : app_source),
+ mbuf->mb_channel->chname,
+ rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
+ addbuf, remstr, addstr,
+ mbuf->mb_channel->creationtime);
+
+ if (mbuf->mb_dest & MODEBUF_DEST_LOG)
+ log_write(LS_OPERMODE, L_INFO, LOG_NOSNOTICE,
+ "%#C OPMODE %H %s%s%s%s%s%s", mbuf->mb_source,
+ mbuf->mb_channel, rembuf_i ? "-" : "", rembuf,
+ addbuf_i ? "+" : "", addbuf, remstr, addstr);
+
+ if (mbuf->mb_dest & MODEBUF_DEST_CHANNEL)
+ sendcmdto_channel_butserv_butone(app_source, CMD_MODE, mbuf->mb_channel, NULL, 0,
+ "%H %s%s%s%s%s%s%s%s", mbuf->mb_channel,
+ rembuf_i || rembuf_local_i ? "-" : "",
+ rembuf, rembuf_local,
+ addbuf_i || addbuf_local_i ? "+" : "",
+ addbuf, addbuf_local,
+ remstr, addstr);
+ }
+
+ /* Now are we supposed to propagate to other servers? */
+ if (mbuf->mb_dest & MODEBUF_DEST_SERVER) {
+ /* set up parameter string */
+ addstr[0] = '\0';
+ addstr_i = 0;
+ remstr[0] = '\0';
+ remstr_i = 0;
+
+ /*
+ * limit is supressed if we're removing it; we have to figure out which
+ * direction is the direction for it to be removed, though...
+ */
+ limitdel |= (mbuf->mb_dest & MODEBUF_DEST_BOUNCE) ? MODE_DEL : MODE_ADD;
+
+ for (i = 0; i < mbuf->mb_count; i++) {
+ if (MB_TYPE(mbuf, i) & MODE_SAVE)
+ continue;
+
+ if (MB_TYPE(mbuf, i) & MODE_ADD) { /* adding or removing? */
+ strptr = addstr;
+ strptr_i = &addstr_i;
+ } else {
+ strptr = remstr;
+ strptr_i = &remstr_i;
+ }
+
+ /* if we're changing oplevels and we know the oplevel, pass it on */
+ if ((MB_TYPE(mbuf, i) & MODE_CHANOP)
+ && MB_OPLEVEL(mbuf, i) < MAXOPLEVEL)
+ *strptr_i += ircd_snprintf(0, strptr + *strptr_i, BUFSIZE - *strptr_i,
+ " %s%s:%d",
+ NumNick(MB_CLIENT(mbuf, i)),
+ MB_OPLEVEL(mbuf, i));
+
+ /* deal with other modes that take clients */
+ else if (MB_TYPE(mbuf, i) & (MODE_CHANOP | MODE_VOICE))
+ build_string(strptr, strptr_i, NumNick(MB_CLIENT(mbuf, i)), ' ');
+
+ /* deal with modes that take strings */
+ else if (MB_TYPE(mbuf, i) & (MODE_KEY | MODE_BAN | MODE_APASS | MODE_UPASS))
+ build_string(strptr, strptr_i, MB_STRING(mbuf, i), 0, ' ');
+
+ /*
+ * deal with the limit. Logic here is complicated; if HACK2 is set,
+ * we're bouncing the mode, so sense is reversed, and we have to
+ * include the original limit if it looks like it's being removed
+ */
+ else if ((MB_TYPE(mbuf, i) & limitdel) == limitdel)
+ build_string(strptr, strptr_i, limitbuf, 0, ' ');
+ }
+
+ /* we were told to deop the source */
+ if (mbuf->mb_dest & MODEBUF_DEST_DEOP) {
+ addbuf[addbuf_i++] = 'o'; /* remember, sense is reversed */
+ addbuf[addbuf_i] = '\0'; /* terminate the string... */
+ build_string(addstr, &addstr_i, NumNick(mbuf->mb_source), ' ');
+
+ /* mark that we've done this, so we don't do it again */
+ mbuf->mb_dest &= ~MODEBUF_DEST_DEOP;
+ }
+
+ if (mbuf->mb_dest & MODEBUF_DEST_OPMODE) {
+ /* If OPMODE was set, we're propagating the mode as an OPMODE message */
+ sendcmdto_serv_butone(mbuf->mb_source, CMD_OPMODE, mbuf->mb_connect,
+ "%H %s%s%s%s%s%s", mbuf->mb_channel,
+ rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
+ addbuf, remstr, addstr);
+ } else if (mbuf->mb_dest & MODEBUF_DEST_BOUNCE) {
+ /*
+ * If HACK2 was set, we're bouncing; we send the MODE back to
+ * the connection we got it from with the senses reversed and
+ * the proper TS; origin is us
+ */
+ sendcmdto_one(&me, CMD_MODE, mbuf->mb_connect, "%H %s%s%s%s%s%s %Tu",
+ mbuf->mb_channel, addbuf_i ? "-" : "", addbuf,
+ rembuf_i ? "+" : "", rembuf, addstr, remstr,
+ mbuf->mb_channel->creationtime);
+ } else {
+ /*
+ * We're propagating a normal (or HACK3 or HACK4) MODE command
+ * to the rest of the network. We send the actual channel TS.
+ */
+ sendcmdto_serv_butone(mbuf->mb_source, CMD_MODE, mbuf->mb_connect,
+ "%H %s%s%s%s%s%s %Tu", mbuf->mb_channel,
+ rembuf_i ? "-" : "", rembuf, addbuf_i ? "+" : "",
+ addbuf, remstr, addstr,
+ mbuf->mb_channel->creationtime);
+ }
+ }
+
+ /* We've drained the ModeBuf... */
+ mbuf->mb_add = 0;
+ mbuf->mb_rem = 0;
+ mbuf->mb_count = 0;
+
+ /* reinitialize the mode-with-arg slots */
+ for (i = 0; i < MAXMODEPARAMS; i++) {
+ /* If we saved any, pack them down */
+ if (MB_TYPE(mbuf, i) & MODE_SAVE) {
+ mbuf->mb_modeargs[mbuf->mb_count] = mbuf->mb_modeargs[i];
+ MB_TYPE(mbuf, mbuf->mb_count) &= ~MODE_SAVE; /* don't save anymore */
+
+ if (mbuf->mb_count++ == i) /* don't overwrite our hard work */
+ continue;
+ } else if (MB_TYPE(mbuf, i) & MODE_FREE)
+ MyFree(MB_STRING(mbuf, i)); /* free string if needed */
+
+ MB_TYPE(mbuf, i) = 0;
+ MB_UINT(mbuf, i) = 0;
+ }
+
+ /* If we're supposed to flush it all, do so--all hail tail recursion */
+ if (all && mbuf->mb_count)
+ return modebuf_flush_int(mbuf, 1);
+
+ return 0;
+}
+
+/** Initialise a modebuf
+ * This routine just initializes a ModeBuf structure with the information
+ * needed and the options given.
+ *
+ * @param mbuf The mode buffer to initialise.
+ * @param source The client that is performing the mode.
+ * @param connect ?
+ * @param chan The channel that the mode is being performed upon.
+ * @param dest ?
+ */
+void
+modebuf_init(struct ModeBuf *mbuf, struct Client *source,
+ struct Client *connect, struct Channel *chan, unsigned int dest)
+{
+ int i;
+
+ assert(0 != mbuf);
+ assert(0 != source);
+ assert(0 != chan);
+ assert(0 != dest);
+
+ if (IsLocalChannel(chan->chname)) dest &= ~MODEBUF_DEST_SERVER;
+
+ mbuf->mb_add = 0;
+ mbuf->mb_rem = 0;
+ mbuf->mb_source = source;
+ mbuf->mb_connect = connect;
+ mbuf->mb_channel = chan;
+ mbuf->mb_dest = dest;
+ mbuf->mb_count = 0;
+
+ /* clear each mode-with-parameter slot */
+ for (i = 0; i < MAXMODEPARAMS; i++) {
+ MB_TYPE(mbuf, i) = 0;
+ MB_UINT(mbuf, i) = 0;
+ }
+}
+
+/** Append a new mode to a modebuf
+ * This routine simply adds modes to be added or deleted; do a binary OR
+ * with either MODE_ADD or MODE_DEL
+ *
+ * @param mbuf Mode buffer
+ * @param mode MODE_ADD or MODE_DEL OR'd with MODE_PRIVATE etc.
+ */
+void
+modebuf_mode(struct ModeBuf *mbuf, unsigned int mode)
+{
+ assert(0 != mbuf);
+ assert(0 != (mode & (MODE_ADD | MODE_DEL)));
+
+ mode &= (MODE_ADD | MODE_DEL | MODE_PRIVATE | MODE_SECRET | MODE_MODERATED |
+ MODE_TOPICLIMIT | MODE_INVITEONLY | MODE_NOPRIVMSGS | MODE_REGONLY |
+ MODE_DELJOINS | MODE_WASDELJOINS | MODE_REGISTERED);
+
+ if (!(mode & ~(MODE_ADD | MODE_DEL))) /* don't add empty modes... */
+ return;
+
+ if (mode & MODE_ADD) {
+ mbuf->mb_rem &= ~mode;
+ mbuf->mb_add |= mode;
+ } else {
+ mbuf->mb_add &= ~mode;
+ mbuf->mb_rem |= mode;
+ }
+}
+
+/** Append a mode that takes an int argument to the modebuf
+ *
+ * This routine adds a mode to be added or deleted that takes a unsigned
+ * int parameter; mode may *only* be the relevant mode flag ORed with one
+ * of MODE_ADD or MODE_DEL
+ *
+ * @param mbuf The mode buffer to append to.
+ * @param mode The mode to append.
+ * @param uint The argument to the mode.
+ */
+void
+modebuf_mode_uint(struct ModeBuf *mbuf, unsigned int mode, unsigned int uint)
+{
+ assert(0 != mbuf);
+ assert(0 != (mode & (MODE_ADD | MODE_DEL)));
+
+ if (mode == (MODE_LIMIT | MODE_DEL)) {
+ mbuf->mb_rem |= mode;
+ return;
+ }
+ MB_TYPE(mbuf, mbuf->mb_count) = mode;
+ MB_UINT(mbuf, mbuf->mb_count) = uint;
+
+ /* when we've reached the maximal count, flush the buffer */
+ if (++mbuf->mb_count >=
+ (MAXMODEPARAMS - (mbuf->mb_dest & MODEBUF_DEST_DEOP ? 1 : 0)))
+ modebuf_flush_int(mbuf, 0);
+}
+
+/** append a string mode
+ * This routine adds a mode to be added or deleted that takes a string
+ * parameter; mode may *only* be the relevant mode flag ORed with one of
+ * MODE_ADD or MODE_DEL
+ *
+ * @param mbuf The mode buffer to append to.
+ * @param mode The mode to append.
+ * @param string The string parameter to append.
+ * @param free If the string should be free'd later.
+ */
+void
+modebuf_mode_string(struct ModeBuf *mbuf, unsigned int mode, char *string,
+ int free)
+{
+ assert(0 != mbuf);
+ assert(0 != (mode & (MODE_ADD | MODE_DEL)));
+
+ MB_TYPE(mbuf, mbuf->mb_count) = mode | (free ? MODE_FREE : 0);
+ MB_STRING(mbuf, mbuf->mb_count) = string;
+
+ /* when we've reached the maximal count, flush the buffer */
+ if (++mbuf->mb_count >=
+ (MAXMODEPARAMS - (mbuf->mb_dest & MODEBUF_DEST_DEOP ? 1 : 0)))
+ modebuf_flush_int(mbuf, 0);
+}
+
+/** Append a mode on a client to a modebuf.
+ * This routine adds a mode to be added or deleted that takes a client
+ * parameter; mode may *only* be the relevant mode flag ORed with one of
+ * MODE_ADD or MODE_DEL
+ *
+ * @param mbuf The modebuf to append the mode to.
+ * @param mode The mode to append.
+ * @param client The client argument to append.
+ * @param oplevel The oplevel the user had or will have
+ */
+void
+modebuf_mode_client(struct ModeBuf *mbuf, unsigned int mode,
+ struct Client *client, int oplevel)
+{
+ assert(0 != mbuf);
+ assert(0 != (mode & (MODE_ADD | MODE_DEL)));
+
+ MB_TYPE(mbuf, mbuf->mb_count) = mode;
+ MB_CLIENT(mbuf, mbuf->mb_count) = client;
+ MB_OPLEVEL(mbuf, mbuf->mb_count) = oplevel;
+
+ /* when we've reached the maximal count, flush the buffer */
+ if (++mbuf->mb_count >=
+ (MAXMODEPARAMS - (mbuf->mb_dest & MODEBUF_DEST_DEOP ? 1 : 0)))
+ modebuf_flush_int(mbuf, 0);
+}
+
+/** The exported binding for modebuf_flush()
+ *
+ * @param mbuf The mode buffer to flush.
+ *
+ * @see modebuf_flush_int()
+ */
+int
+modebuf_flush(struct ModeBuf *mbuf)
+{
+ return modebuf_flush_int(mbuf, 1);
+}
+
+/* This extracts the simple modes contained in mbuf
+ *
+ * @param mbuf The mode buffer to extract the modes from.
+ * @param buf The string buffer to write the modes into.
+ */
+void
+modebuf_extract(struct ModeBuf *mbuf, char *buf)
+{
+ static int flags[] = {
+/* MODE_CHANOP, 'o', */
+/* MODE_VOICE, 'v', */
+ MODE_PRIVATE, 'p',
+ MODE_SECRET, 's',
+ MODE_MODERATED, 'm',
+ MODE_TOPICLIMIT, 't',
+ MODE_INVITEONLY, 'i',
+ MODE_NOPRIVMSGS, 'n',
+ MODE_KEY, 'k',
+ MODE_APASS, 'A',
+ MODE_UPASS, 'U',
+ MODE_REGISTERED, 'R',
+/* MODE_BAN, 'b', */
+ MODE_LIMIT, 'l',
+ MODE_REGONLY, 'r',
+ MODE_DELJOINS, 'D',
+ 0x0, 0x0
+ };
+ unsigned int add;
+ int i, bufpos = 0, len;
+ int *flag_p;
+ char *key = 0, limitbuf[20];
+ char *apass = 0, *upass = 0;
+
+ assert(0 != mbuf);
+ assert(0 != buf);
+
+ buf[0] = '\0';
+
+ add = mbuf->mb_add;
+
+ for (i = 0; i < mbuf->mb_count; i++) { /* find keys and limits */
+ if (MB_TYPE(mbuf, i) & MODE_ADD) {
+ add |= MB_TYPE(mbuf, i) & (MODE_KEY | MODE_LIMIT | MODE_APASS | MODE_UPASS);
+
+ if (MB_TYPE(mbuf, i) & MODE_KEY) /* keep strings */
+ key = MB_STRING(mbuf, i);
+ else if (MB_TYPE(mbuf, i) & MODE_LIMIT)
+ ircd_snprintf(0, limitbuf, sizeof(limitbuf), "%u", MB_UINT(mbuf, i));
+ else if (MB_TYPE(mbuf, i) & MODE_UPASS)
+ upass = MB_STRING(mbuf, i);
+ else if (MB_TYPE(mbuf, i) & MODE_APASS)
+ apass = MB_STRING(mbuf, i);
+ }
+ }
+
+ if (!add)
+ return;
+
+ buf[bufpos++] = '+'; /* start building buffer */
+
+ for (flag_p = flags; flag_p[0]; flag_p += 2)
+ if (*flag_p & add)
+ buf[bufpos++] = flag_p[1];
+
+ for (i = 0, len = bufpos; i < len; i++) {
+ if (buf[i] == 'k')
+ build_string(buf, &bufpos, key, 0, ' ');
+ else if (buf[i] == 'l')
+ build_string(buf, &bufpos, limitbuf, 0, ' ');
+ else if (buf[i] == 'U')
+ build_string(buf, &bufpos, upass, 0, ' ');
+ else if (buf[i] == 'A')
+ build_string(buf, &bufpos, apass, 0, ' ');
+ }
+
+ buf[bufpos] = '\0';
+
+ return;
+}
+
+/** Simple function to invalidate a channel's ban cache.
+ *
+ * This function marks all members of the channel as being neither
+ * banned nor banned.
+ *
+ * @param chan The channel to operate on.
+ */
+void
+mode_ban_invalidate(struct Channel *chan)
+{
+ struct Membership *member;
+
+ for (member = chan->members; member; member = member->next_member)
+ ClearBanValid(member);
+}
+
+/** Simple function to drop invite structures
+ *
+ * Remove all the invites on the channel.
+ *
+ * @param chan Channel to remove invites from.
+ *
+ */
+void
+mode_invite_clear(struct Channel *chan)
+{
+ while (chan->invites)
+ del_invite(chan->invites->value.cptr, chan);
+}
+
+/* What we've done for mode_parse so far... */
+#define DONE_LIMIT 0x01 /**< We've set the limit */
+#define DONE_KEY_ADD 0x02 /**< We've set the key */
+#define DONE_BANLIST 0x04 /**< We've sent the ban list */
+#define DONE_NOTOPER 0x08 /**< We've sent a "Not oper" error */
+#define DONE_BANCLEAN 0x10 /**< We've cleaned bans... */
+#define DONE_UPASS_ADD 0x20 /**< We've set user pass */
+#define DONE_APASS_ADD 0x40 /**< We've set admin pass */
+#define DONE_KEY_DEL 0x80 /**< We've removed the key */
+#define DONE_UPASS_DEL 0x100 /**< We've removed the user pass */
+#define DONE_APASS_DEL 0x200 /**< We've removed the admin pass */
+
+struct ParseState {
+ struct ModeBuf *mbuf;
+ struct Client *cptr;
+ struct Client *sptr;
+ struct Channel *chptr;
+ struct Membership *member;
+ int parc;
+ char **parv;
+ unsigned int flags;
+ unsigned int dir;
+ unsigned int done;
+ unsigned int add;
+ unsigned int del;
+ int args_used;
+ int max_args;
+ int numbans;
+ struct Ban banlist[MAXPARA];
+ struct {
+ unsigned int flag;
+ unsigned short oplevel;
+ struct Client *client;
+ } cli_change[MAXPARA];
+};
+
+/** Helper function to send "Not oper" or "Not member" messages
+ * Here's a helper function to deal with sending along "Not oper" or
+ * "Not member" messages
+ *
+ * @param state Parsing State object
+ */
+static void
+send_notoper(struct ParseState *state)
+{
+ if (state->done & DONE_NOTOPER)
+ return;
+
+ send_reply(state->sptr, (state->flags & MODE_PARSE_NOTOPER) ?
+ ERR_CHANOPRIVSNEEDED : ERR_NOTONCHANNEL, state->chptr->chname);
+
+ state->done |= DONE_NOTOPER;
+}
+
+/** Parse a limit
+ * Helper function to convert limits
+ *
+ * @param state Parsing state object.
+ * @param flag_p ?
+ */
+static void
+mode_parse_limit(struct ParseState *state, int *flag_p)
+{
+ unsigned int t_limit;
+
+ if (state->dir == MODE_ADD) { /* convert arg only if adding limit */
+ if (MyUser(state->sptr) && state->max_args <= 0) /* too many args? */
+ return;
+
+ if (state->parc <= 0) { /* warn if not enough args */
+ if (MyUser(state->sptr))
+ need_more_params(state->sptr, "MODE +l");
+ return;
+ }
+
+ t_limit = strtoul(state->parv[state->args_used++], 0, 10); /* grab arg */
+ state->parc--;
+ state->max_args--;
+
+ if ((int)t_limit<0) /* don't permit a negative limit */
+ return;
+
+ if (!(state->flags & MODE_PARSE_WIPEOUT) &&
+ (!t_limit || t_limit == state->chptr->mode.limit))
+ return;
+ } else
+ t_limit = state->chptr->mode.limit;
+
+ /* If they're not an oper, they can't change modes */
+ if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
+ send_notoper(state);
+ return;
+ }
+
+ /* Can't remove a limit that's not there */
+ if (state->dir == MODE_DEL && !state->chptr->mode.limit)
+ return;
+
+ /* Skip if this is a burst and a lower limit than this is set already */
+ if ((state->flags & MODE_PARSE_BURST) &&
+ (state->chptr->mode.mode & flag_p[0]) &&
+ (state->chptr->mode.limit < t_limit))
+ return;
+
+ if (state->done & DONE_LIMIT) /* allow limit to be set only once */
+ return;
+ state->done |= DONE_LIMIT;
+
+ if (!state->mbuf)
+ return;
+
+ modebuf_mode_uint(state->mbuf, state->dir | flag_p[0], t_limit);
+
+ if (state->flags & MODE_PARSE_SET) { /* set the limit */
+ if (state->dir & MODE_ADD) {
+ state->chptr->mode.mode |= flag_p[0];
+ state->chptr->mode.limit = t_limit;
+ } else {
+ state->chptr->mode.mode &= ~flag_p[0];
+ state->chptr->mode.limit = 0;
+ }
+ }
+}
+
+/** Helper function to validate key-like parameters.
+ *
+ * @param[in] state Parse state for feedback to user.
+ * @param[in] s Key to validate.
+ * @param[in] command String to pass for need_more_params() command.
+ * @return Zero on an invalid key, non-zero if the key was okay.
+ */
+static int
+is_clean_key(struct ParseState *state, char *s, char *command)
+{
+ int ii;
+
+ if (s[0] == '\0') {
+ if (MyUser(state->sptr))
+ need_more_params(state->sptr, command);
+ return 0;
+ }
+ else if (s[0] == ':') {
+ if (MyUser(state->sptr))
+ send_reply(state->sptr, ERR_INVALIDKEY, state->chptr->chname);
+ return 0;
+ }
+ for (ii = 0; (ii <= KEYLEN) && (s[ii] != '\0'); ++ii) {
+ if ((unsigned char)s[ii] <= ' ' || s[ii] == ',') {
+ if (MyUser(state->sptr))
+ send_reply(state->sptr, ERR_INVALIDKEY, state->chptr->chname);
+ return 0;
+ }
+ }
+ if (ii > KEYLEN) {
+ if (MyUser(state->sptr))
+ send_reply(state->sptr, ERR_INVALIDKEY, state->chptr->chname);
+ return 0;
+ }
+ return 1;
+}
+
+/*
+ * Helper function to convert keys
+ */
+static void
+mode_parse_key(struct ParseState *state, int *flag_p)
+{
+ char *t_str;
+
+ if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
+ return;
+
+ if (state->parc <= 0) { /* warn if not enough args */
+ if (MyUser(state->sptr))
+ need_more_params(state->sptr, state->dir == MODE_ADD ? "MODE +k" :
+ "MODE -k");
+ return;
+ }
+
+ t_str = state->parv[state->args_used++]; /* grab arg */
+ state->parc--;
+ state->max_args--;
+
+ /* If they're not an oper, they can't change modes */
+ if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
+ send_notoper(state);
+ return;
+ }
+
+ /* allow removing and then adding key, but not adding and then removing */
+ if (state->dir == MODE_ADD)
+ {
+ if (state->done & DONE_KEY_ADD)
+ return;
+ state->done |= DONE_KEY_ADD;
+ }
+ else
+ {
+ if (state->done & (DONE_KEY_ADD | DONE_KEY_DEL))
+ return;
+ state->done |= DONE_KEY_DEL;
+ }
+
+ /* If the key is invalid, tell the user and bail. */
+ if (!is_clean_key(state, t_str, state->dir == MODE_ADD ? "MODE +k" :
+ "MODE -k"))
+ return;
+
+ if (!state->mbuf)
+ return;
+
+ /* Skip if this is a burst, we have a key already and the new key is
+ * after the old one alphabetically */
+ if ((state->flags & MODE_PARSE_BURST) &&
+ *(state->chptr->mode.key) &&
+ ircd_strcmp(state->chptr->mode.key, t_str) <= 0)
+ return;
+
+ /* can't add a key if one is set, nor can one remove the wrong key */
+ if (!(state->flags & MODE_PARSE_FORCE))
+ if ((state->dir == MODE_ADD && *state->chptr->mode.key) ||
+ (state->dir == MODE_DEL &&
+ ircd_strcmp(state->chptr->mode.key, t_str))) {
+ send_reply(state->sptr, ERR_KEYSET, state->chptr->chname);
+ return;
+ }
+
+ if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
+ !ircd_strcmp(state->chptr->mode.key, t_str))
+ return; /* no key change */
+
+ if (state->flags & MODE_PARSE_BOUNCE) {
+ if (*state->chptr->mode.key) /* reset old key */
+ modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0],
+ state->chptr->mode.key, 0);
+ else /* remove new bogus key */
+ modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
+ } else /* send new key */
+ modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
+
+ if (state->flags & MODE_PARSE_SET) {
+ if (state->dir == MODE_DEL) /* remove the old key */
+ *state->chptr->mode.key = '\0';
+ else
+ ircd_strncpy(state->chptr->mode.key, t_str, KEYLEN);
+ }
+}
+
+/*
+ * Helper function to convert user passes
+ */
+static void
+mode_parse_upass(struct ParseState *state, int *flag_p)
+{
+ char *t_str;
+
+ if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
+ return;
+
+ if (state->parc <= 0) { /* warn if not enough args */
+ if (MyUser(state->sptr))
+ need_more_params(state->sptr, state->dir == MODE_ADD ? "MODE +U" :
+ "MODE -U");
+ return;
+ }
+
+ t_str = state->parv[state->args_used++]; /* grab arg */
+ state->parc--;
+ state->max_args--;
+
+ /* If they're not an oper, they can't change modes */
+ if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
+ send_notoper(state);
+ return;
+ }
+
+ /* If a non-service user is trying to force it, refuse. */
+ if (state->flags & MODE_PARSE_FORCE && MyUser(state->sptr)
+ && !HasPriv(state->sptr, PRIV_APASS_OPMODE)) {
+ send_reply(state->sptr, ERR_NOTMANAGER, state->chptr->chname,
+ state->chptr->chname);
+ return;
+ }
+
+ /* If they are not the channel manager, they are not allowed to change it */
+ if (MyUser(state->sptr) && !(state->flags & MODE_PARSE_FORCE || IsChannelManager(state->member))) {
+ if (*state->chptr->mode.apass) {
+ send_reply(state->sptr, ERR_NOTMANAGER, state->chptr->chname,
+ state->chptr->chname);
+ } else {
+ send_reply(state->sptr, ERR_NOMANAGER, state->chptr->chname,
+ (TStime() - state->chptr->creationtime < 172800) ?
+ "approximately 4-5 minutes" : "approximately 48 hours");
+ }
+ return;
+ }
+
+ /* allow removing and then adding upass, but not adding and then removing */
+ if (state->dir == MODE_ADD)
+ {
+ if (state->done & DONE_UPASS_ADD)
+ return;
+ state->done |= DONE_UPASS_ADD;
+ }
+ else
+ {
+ if (state->done & (DONE_UPASS_ADD | DONE_UPASS_DEL))
+ return;
+ state->done |= DONE_UPASS_DEL;
+ }
+
+ /* If the Upass is invalid, tell the user and bail. */
+ if (!is_clean_key(state, t_str, state->dir == MODE_ADD ? "MODE +U" :
+ "MODE -U"))
+ return;
+
+ if (!state->mbuf)
+ return;
+
+ if (!(state->flags & MODE_PARSE_FORCE)) {
+ /* can't add the upass while apass is not set */
+ if (state->dir == MODE_ADD && !*state->chptr->mode.apass) {
+ send_reply(state->sptr, ERR_UPASSNOTSET, state->chptr->chname, state->chptr->chname);
+ return;
+ }
+ /* cannot set a +U password that is the same as +A */
+ if (state->dir == MODE_ADD && !ircd_strcmp(state->chptr->mode.apass, t_str)) {
+ send_reply(state->sptr, ERR_UPASS_SAME_APASS, state->chptr->chname);
+ return;
+ }
+ /* can't add a upass if one is set, nor can one remove the wrong upass */
+ if ((state->dir == MODE_ADD && *state->chptr->mode.upass) ||
+ (state->dir == MODE_DEL &&
+ ircd_strcmp(state->chptr->mode.upass, t_str))) {
+ send_reply(state->sptr, ERR_KEYSET, state->chptr->chname);
+ return;
+ }
+ }
+
+ if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
+ !ircd_strcmp(state->chptr->mode.upass, t_str))
+ return; /* no upass change */
+
+ /* Skip if this is a burst, we have a Upass already and the new Upass is
+ * after the old one alphabetically */
+ if ((state->flags & MODE_PARSE_BURST) &&
+ *(state->chptr->mode.upass) &&
+ ircd_strcmp(state->chptr->mode.upass, t_str) <= 0)
+ return;
+
+ if (state->flags & MODE_PARSE_BOUNCE) {
+ if (*state->chptr->mode.upass) /* reset old upass */
+ modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0],
+ state->chptr->mode.upass, 0);
+ else /* remove new bogus upass */
+ modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
+ } else /* send new upass */
+ modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
+
+ if (state->flags & MODE_PARSE_SET) {
+ if (state->dir == MODE_DEL) /* remove the old upass */
+ *state->chptr->mode.upass = '\0';
+ else
+ ircd_strncpy(state->chptr->mode.upass, t_str, KEYLEN);
+ }
+}
+
+/*
+ * Helper function to convert admin passes
+ */
+static void
+mode_parse_apass(struct ParseState *state, int *flag_p)
+{
+ struct Membership *memb;
+ char *t_str;
+
+ if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
+ return;
+
+ if (state->parc <= 0) { /* warn if not enough args */
+ if (MyUser(state->sptr))
+ need_more_params(state->sptr, state->dir == MODE_ADD ? "MODE +A" :
+ "MODE -A");
+ return;
+ }
+
+ t_str = state->parv[state->args_used++]; /* grab arg */
+ state->parc--;
+ state->max_args--;
+
+ /* If they're not an oper, they can't change modes */
+ if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
+ send_notoper(state);
+ return;
+ }
+
+ if (MyUser(state->sptr)) {
+ if (state->flags & MODE_PARSE_FORCE) {
+ /* If an unprivileged oper is trying to force it, refuse. */
+ if (!HasPriv(state->sptr, PRIV_APASS_OPMODE)) {
+ send_reply(state->sptr, ERR_NOTMANAGER, state->chptr->chname,
+ state->chptr->chname);
+ return;
+ }
+ } else {
+ /* If they are not the channel manager, they are not allowed to change it. */
+ if (!IsChannelManager(state->member)) {
+ if (*state->chptr->mode.apass) {
+ send_reply(state->sptr, ERR_NOTMANAGER, state->chptr->chname,
+ state->chptr->chname);
+ } else {
+ send_reply(state->sptr, ERR_NOMANAGER, state->chptr->chname,
+ (TStime() - state->chptr->creationtime < 172800) ?
+ "approximately 4-5 minutes" : "approximately 48 hours");
+ }
+ return;
+ }
+ /* Can't remove the Apass while Upass is still set. */
+ if (state->dir == MODE_DEL && *state->chptr->mode.upass) {
+ send_reply(state->sptr, ERR_UPASSSET, state->chptr->chname, state->chptr->chname);
+ return;
+ }
+ /* Can't add an Apass if one is set, nor can one remove the wrong Apass. */
+ if ((state->dir == MODE_ADD && *state->chptr->mode.apass) ||
+ (state->dir == MODE_DEL && ircd_strcmp(state->chptr->mode.apass, t_str))) {
+ send_reply(state->sptr, ERR_KEYSET, state->chptr->chname);
+ return;
+ }
+ }
+
+ /* Forbid removing the Apass if the channel is older than 48 hours
+ * unless an oper is doing it. */
+ if (TStime() - state->chptr->creationtime >= 172800
+ && state->dir == MODE_DEL
+ && !IsAnOper(state->sptr)) {
+ send_reply(state->sptr, ERR_CHANSECURED, state->chptr->chname);
+ return;
+ }
+ }
+
+ /* allow removing and then adding apass, but not adding and then removing */
+ if (state->dir == MODE_ADD)
+ {
+ if (state->done & DONE_APASS_ADD)
+ return;
+ state->done |= DONE_APASS_ADD;
+ }
+ else
+ {
+ if (state->done & (DONE_APASS_ADD | DONE_APASS_DEL))
+ return;
+ state->done |= DONE_APASS_DEL;
+ }
+
+ /* If the Apass is invalid, tell the user and bail. */
+ if (!is_clean_key(state, t_str, state->dir == MODE_ADD ? "MODE +A" :
+ "MODE -A"))
+ return;
+
+ if (!state->mbuf)
+ return;
+
+ if (!(state->flags & MODE_PARSE_WIPEOUT) && state->dir == MODE_ADD &&
+ !ircd_strcmp(state->chptr->mode.apass, t_str))
+ return; /* no apass change */
+
+ /* Skip if this is a burst, we have an Apass already and the new Apass is
+ * after the old one alphabetically */
+ if ((state->flags & MODE_PARSE_BURST) &&
+ *(state->chptr->mode.apass) &&
+ ircd_strcmp(state->chptr->mode.apass, t_str) <= 0)
+ return;
+
+ if (state->flags & MODE_PARSE_BOUNCE) {
+ if (*state->chptr->mode.apass) /* reset old apass */
+ modebuf_mode_string(state->mbuf, MODE_DEL | flag_p[0],
+ state->chptr->mode.apass, 0);
+ else /* remove new bogus apass */
+ modebuf_mode_string(state->mbuf, MODE_ADD | flag_p[0], t_str, 0);
+ } else /* send new apass */
+ modebuf_mode_string(state->mbuf, state->dir | flag_p[0], t_str, 0);
+
+ if (state->flags & MODE_PARSE_SET) {
+ if (state->dir == MODE_ADD) { /* set the new apass */
+ /* Only accept the new apass if there is no current apass or
+ * this is a BURST. */
+ if (state->chptr->mode.apass[0] == '\0' ||
+ (state->flags & MODE_PARSE_BURST))
+ ircd_strncpy(state->chptr->mode.apass, t_str, KEYLEN);
+ /* Make it VERY clear to the user that this is a one-time password */
+ if (MyUser(state->sptr)) {
+ send_reply(state->sptr, RPL_APASSWARN_SET, state->chptr->mode.apass);
+ send_reply(state->sptr, RPL_APASSWARN_SECRET, state->chptr->chname,
+ state->chptr->mode.apass);
+ }
+ /* Give the channel manager level 0 ops.
+ There should not be tested for IsChannelManager here because
+ on the local server it is impossible to set the apass if one
+ isn't a channel manager and remote servers might need to sync
+ the oplevel here: when someone creates a channel (and becomes
+ channel manager) during a net.break, and only sets the Apass
+ after the net rejoined, they will have oplevel MAXOPLEVEL on
+ all remote servers. */
+ if (state->member)
+ SetOpLevel(state->member, 0);
+ } else { /* remove the old apass */
+ *state->chptr->mode.apass = '\0';
+ /* Clear Upass so that there is never a Upass set when a zannel is burst. */
+ *state->chptr->mode.upass = '\0';
+ if (MyUser(state->sptr))
+ send_reply(state->sptr, RPL_APASSWARN_CLEAR);
+ /* Revert everyone to MAXOPLEVEL. */
+ for (memb = state->chptr->members; memb; memb = memb->next_member) {
+ if (memb->status & MODE_CHANOP)
+ SetOpLevel(memb, MAXOPLEVEL);
+ }
+ }
+ }
+}
+
+/** Compare one ban's extent to another.
+ * This works very similarly to mmatch() but it knows about CIDR masks
+ * and ban exceptions. If both bans are CIDR-based, compare their
+ * address bits; otherwise, use mmatch().
+ * @param[in] old_ban One ban.
+ * @param[in] new_ban Another ban.
+ * @return Zero if \a old_ban is a superset of \a new_ban, non-zero otherwise.
+ */
+static int
+bmatch(struct Ban *old_ban, struct Ban *new_ban)
+{
+ int res;
+ assert(old_ban != NULL);
+ assert(new_ban != NULL);
+ /* A ban is never treated as a superset of an exception. */
+ if (!(old_ban->flags & BAN_EXCEPTION)
+ && (new_ban->flags & BAN_EXCEPTION))
+ return 1;
+ /* If either is not an address mask, match the text masks. */
+ if ((old_ban->flags & new_ban->flags & BAN_IPMASK) == 0)
+ return mmatch(old_ban->banstr, new_ban->banstr);
+ /* If the old ban has a longer prefix than new, it cannot be a superset. */
+ if (old_ban->addrbits > new_ban->addrbits)
+ return 1;
+ /* Compare the masks before the hostname part. */
+ old_ban->banstr[old_ban->nu_len] = new_ban->banstr[new_ban->nu_len] = '\0';
+ res = mmatch(old_ban->banstr, new_ban->banstr);
+ old_ban->banstr[old_ban->nu_len] = new_ban->banstr[new_ban->nu_len] = '@';
+ if (res)
+ return res;
+ /* If the old ban's mask mismatches, cannot be a superset. */
+ if (!ipmask_check(&new_ban->address, &old_ban->address, old_ban->addrbits))
+ return 1;
+ /* Otherwise it depends on whether the old ban's text is a superset
+ * of the new. */
+ return mmatch(old_ban->banstr, new_ban->banstr);
+}
+
+/** Add a ban from a ban list and mark bans that should be removed
+ * because they overlap.
+ *
+ * There are three invariants for a ban list. First, no ban may be
+ * more specific than another ban. Second, no exception may be more
+ * specific than another exception. Finally, no ban may be more
+ * specific than any exception.
+ *
+ * @param[in,out] banlist Pointer to head of list.
+ * @param[in] newban Ban (or exception) to add (or remove).
+ * @param[in] do_free If non-zero, free \a newban on failure.
+ * @return Zero if \a newban could be applied, non-zero if not.
+ */
+int apply_ban(struct Ban **banlist, struct Ban *newban, int do_free)
+{
+ struct Ban *ban;
+ size_t count = 0;
+
+ assert(newban->flags & (BAN_ADD|BAN_DEL));
+ if (newban->flags & BAN_ADD) {
+ size_t totlen = 0;
+ /* If a less specific *active* entry is found, fail. */
+ for (ban = *banlist; ban; ban = ban->next) {
+ if (!bmatch(ban, newban) && !(ban->flags & BAN_DEL)) {
+ if (do_free)
+ free_ban(newban);
+ return 1;
+ }
+ if (!(ban->flags & (BAN_OVERLAPPED|BAN_DEL))) {
+ count++;
+ totlen += strlen(ban->banstr);
+ }
+ }
+ /* Mark more specific entries and add this one to the end of the list. */
+ while ((ban = *banlist) != NULL) {
+ if (!bmatch(newban, ban)) {
+ ban->flags |= BAN_OVERLAPPED | BAN_DEL;
+ }
+ banlist = &ban->next;
+ }
+ *banlist = newban;
+ return 0;
+ } else if (newban->flags & BAN_DEL) {
+ size_t remove_count = 0;
+ /* Mark more specific entries. */
+ for (ban = *banlist; ban; ban = ban->next) {
+ if (!bmatch(newban, ban)) {
+ ban->flags |= BAN_OVERLAPPED | BAN_DEL;
+ remove_count++;
+ }
+ }
+ if (remove_count)
+ return 0;
+ /* If no matches were found, fail. */
+ if (do_free)
+ free_ban(newban);
+ return 3;
+ }
+ if (do_free)
+ free_ban(newban);
+ return 4;
+}
+
+/*
+ * Helper function to convert bans
+ */
+static void
+mode_parse_ban(struct ParseState *state, int *flag_p)
+{
+ char *t_str, *s;
+ struct Ban *ban, *newban;
+
+ if (state->parc <= 0) { /* Not enough args, send ban list */
+ if (MyUser(state->sptr) && !(state->done & DONE_BANLIST)) {
+ send_ban_list(state->sptr, state->chptr);
+ state->done |= DONE_BANLIST;
+ }
+
+ return;
+ }
+
+ if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
+ return;
+
+ t_str = state->parv[state->args_used++]; /* grab arg */
+ state->parc--;
+ state->max_args--;
+
+ /* If they're not an oper, they can't change modes */
+ if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
+ send_notoper(state);
+ return;
+ }
+
+ if ((s = strchr(t_str, ' ')))
+ *s = '\0';
+
+ if (!*t_str || *t_str == ':') { /* warn if empty */
+ if (MyUser(state->sptr))
+ need_more_params(state->sptr, state->dir == MODE_ADD ? "MODE +b" :
+ "MODE -b");
+ return;
+ }
+
+ /* Clear all ADD/DEL/OVERLAPPED flags from ban list. */
+ if (!(state->done & DONE_BANCLEAN)) {
+ for (ban = state->chptr->banlist; ban; ban = ban->next)
+ ban->flags &= ~(BAN_ADD | BAN_DEL | BAN_OVERLAPPED);
+ state->done |= DONE_BANCLEAN;
+ }
+
+ /* remember the ban for the moment... */
+ newban = state->banlist + (state->numbans++);
+ newban->next = 0;
+ newban->flags = ((state->dir == MODE_ADD) ? BAN_ADD : BAN_DEL)
+ | (*flag_p == MODE_BAN ? 0 : BAN_EXCEPTION);
+ set_ban_mask(newban, collapse(pretty_mask(t_str)));
+ ircd_strncpy(newban->who, IsUser(state->sptr) ? cli_name(state->sptr) : "*", NICKLEN);
+ newban->when = TStime();
+ apply_ban(&state->chptr->banlist, newban, 0);
+}
+
+/*
+ * This is the bottom half of the ban processor
+ */
+static void
+mode_process_bans(struct ParseState *state)
+{
+ struct Ban *ban, *newban, *prevban, *nextban;
+ int count = 0;
+ int len = 0;
+ int banlen;
+ int changed = 0;
+
+ for (prevban = 0, ban = state->chptr->banlist; ban; ban = nextban) {
+ count++;
+ banlen = strlen(ban->banstr);
+ len += banlen;
+ nextban = ban->next;
+
+ if ((ban->flags & (BAN_DEL | BAN_ADD)) == (BAN_DEL | BAN_ADD)) {
+ if (prevban)
+ prevban->next = 0; /* Break the list; ban isn't a real ban */
+ else
+ state->chptr->banlist = 0;
+
+ count--;
+ len -= banlen;
+
+ continue;
+ } else if (ban->flags & BAN_DEL) { /* Deleted a ban? */
+ char *bandup;
+ DupString(bandup, ban->banstr);
+ modebuf_mode_string(state->mbuf, MODE_DEL | MODE_BAN,
+ bandup, 1);
+
+ if (state->flags & MODE_PARSE_SET) { /* Ok, make it take effect */
+ if (prevban) /* clip it out of the list... */
+ prevban->next = ban->next;
+ else
+ state->chptr->banlist = ban->next;
+
+ count--;
+ len -= banlen;
+ free_ban(ban);
+
+ changed++;
+ continue; /* next ban; keep prevban like it is */
+ } else
+ ban->flags &= BAN_IPMASK; /* unset other flags */
+ } else if (ban->flags & BAN_ADD) { /* adding a ban? */
+ if (prevban)
+ prevban->next = 0; /* Break the list; ban isn't a real ban */
+ else
+ state->chptr->banlist = 0;
+
+ /* If we're supposed to ignore it, do so. */
+ if (ban->flags & BAN_OVERLAPPED &&
+ !(state->flags & MODE_PARSE_BOUNCE)) {
+ count--;
+ len -= banlen;
+ } else {
+ if (state->flags & MODE_PARSE_SET && MyUser(state->sptr) &&
+ !(state->mbuf->mb_dest & MODEBUF_DEST_OPMODE) &&
+ (len > (feature_int(FEAT_AVBANLEN) * feature_int(FEAT_MAXBANS)) ||
+ count > feature_int(FEAT_MAXBANS))) {
+ send_reply(state->sptr, ERR_BANLISTFULL, state->chptr->chname,
+ ban->banstr);
+ count--;
+ len -= banlen;
+ } else {
+ char *bandup;
+ /* add the ban to the buffer */
+ DupString(bandup, ban->banstr);
+ modebuf_mode_string(state->mbuf, MODE_ADD | MODE_BAN,
+ bandup, 1);
+
+ if (state->flags & MODE_PARSE_SET) { /* create a new ban */
+ newban = make_ban(ban->banstr);
+ strcpy(newban->who, ban->who);
+ newban->when = ban->when;
+ newban->flags = ban->flags & BAN_IPMASK;
+
+ newban->next = state->chptr->banlist; /* and link it in */
+ state->chptr->banlist = newban;
+
+ changed++;
+ }
+ }
+ }
+ }
+
+ prevban = ban;
+ } /* for (prevban = 0, ban = state->chptr->banlist; ban; ban = nextban) { */
+
+ if (changed) /* if we changed the ban list, we must invalidate the bans */
+ mode_ban_invalidate(state->chptr);
+}
+
+/*
+ * Helper function to process client changes
+ */
+static void
+mode_parse_client(struct ParseState *state, int *flag_p)
+{
+ char *t_str;
+ char *colon;
+ struct Client *acptr;
+ struct Membership *member;
+ int oplevel = MAXOPLEVEL + 1;
+ int req_oplevel;
+ int i;
+
+ if (MyUser(state->sptr) && state->max_args <= 0) /* drop if too many args */
+ return;
+
+ if (state->parc <= 0) /* return if not enough args */
+ return;
+
+ t_str = state->parv[state->args_used++]; /* grab arg */
+ state->parc--;
+ state->max_args--;
+
+ /* If they're not an oper, they can't change modes */
+ if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
+ send_notoper(state);
+ return;
+ }
+
+ if (MyUser(state->sptr)) {
+ colon = strchr(t_str, ':');
+ if (colon != NULL) {
+ *colon++ = '\0';
+ req_oplevel = atoi(colon);
+ if (*flag_p == CHFL_VOICE || state->dir == MODE_DEL) {
+ /* Ignore the colon and its argument. */
+ } else if (!(state->flags & MODE_PARSE_FORCE)
+ && state->member
+ && (req_oplevel < OpLevel(state->member)
+ || (req_oplevel == OpLevel(state->member)
+ && OpLevel(state->member) < MAXOPLEVEL)
+ || req_oplevel > MAXOPLEVEL)) {
+ send_reply(state->sptr, ERR_NOTLOWEROPLEVEL,
+ t_str, state->chptr->chname,
+ OpLevel(state->member), req_oplevel, "op",
+ OpLevel(state->member) == req_oplevel ? "the same" : "a higher");
+ } else if (req_oplevel <= MAXOPLEVEL)
+ oplevel = req_oplevel;
+ }
+ /* find client we're manipulating */
+ acptr = find_chasing(state->sptr, t_str, NULL);
+ } else {
+ if (t_str[5] == ':') {
+ t_str[5] = '\0';
+ oplevel = atoi(t_str + 6);
+ }
+ acptr = findNUser(t_str);
+ }
+
+ if (!acptr)
+ return; /* find_chasing() already reported an error to the user */
+
+ for (i = 0; i < MAXPARA; i++) /* find an element to stick them in */
+ if (!state->cli_change[i].flag || (state->cli_change[i].client == acptr &&
+ state->cli_change[i].flag & flag_p[0]))
+ break; /* found a slot */
+
+ /* If we are going to bounce this deop, mark the correct oplevel. */
+ if (state->flags & MODE_PARSE_BOUNCE
+ && state->dir == MODE_DEL
+ && flag_p[0] == MODE_CHANOP
+ && (member = find_member_link(state->chptr, acptr)))
+ oplevel = OpLevel(member);
+
+ /* Store what we're doing to them */
+ state->cli_change[i].flag = state->dir | flag_p[0];
+ state->cli_change[i].oplevel = oplevel;
+ state->cli_change[i].client = acptr;
+}
+
+/*
+ * Helper function to process the changed client list
+ */
+static void
+mode_process_clients(struct ParseState *state)
+{
+ int i;
+ struct Membership *member;
+
+ for (i = 0; state->cli_change[i].flag; i++) {
+ assert(0 != state->cli_change[i].client);
+
+ /* look up member link */
+ if (!(member = find_member_link(state->chptr,
+ state->cli_change[i].client)) ||
+ (MyUser(state->sptr) && IsZombie(member))) {
+ if (MyUser(state->sptr))
+ send_reply(state->sptr, ERR_USERNOTINCHANNEL,
+ cli_name(state->cli_change[i].client),
+ state->chptr->chname);
+ continue;
+ }
+
+ if ((state->cli_change[i].flag & MODE_ADD &&
+ (state->cli_change[i].flag & member->status)) ||
+ (state->cli_change[i].flag & MODE_DEL &&
+ !(state->cli_change[i].flag & member->status)))
+ continue; /* no change made, don't do anything */
+
+ /* see if the deop is allowed */
+ if ((state->cli_change[i].flag & (MODE_DEL | MODE_CHANOP)) ==
+ (MODE_DEL | MODE_CHANOP)) {
+ /* prevent +k users from being deopped */
+ if (IsChannelService(state->cli_change[i].client)) {
+ if (state->flags & MODE_PARSE_FORCE) /* it was forced */
+ sendto_opmask_butone(0, SNO_HACK4, "Deop of +k user on %H by %s",
+ state->chptr,
+ (IsServer(state->sptr) ? cli_name(state->sptr) :
+ cli_name((cli_user(state->sptr))->server)));
+
+ else if (MyUser(state->sptr) && state->flags & MODE_PARSE_SET) {
+ send_reply(state->sptr, ERR_ISCHANSERVICE,
+ cli_name(state->cli_change[i].client),
+ state->chptr->chname);
+ continue;
+ }
+ }
+
+ /* check deop for local user */
+ if (MyUser(state->sptr)) {
+
+ /* don't allow local opers to be deopped on local channels */
+ if (state->cli_change[i].client != state->sptr &&
+ IsLocalChannel(state->chptr->chname) &&
+ HasPriv(state->cli_change[i].client, PRIV_DEOP_LCHAN)) {
+ send_reply(state->sptr, ERR_ISOPERLCHAN,
+ cli_name(state->cli_change[i].client),
+ state->chptr->chname);
+ continue;
+ }
+
+ /* Forbid deopping other members with an oplevel less than
+ * one's own level, and other members with an oplevel the same
+ * as one's own unless both are at MAXOPLEVEL. */
+ if (state->sptr != state->cli_change[i].client
+ && state->member
+ && ((OpLevel(member) < OpLevel(state->member))
+ || (OpLevel(member) == OpLevel(state->member)
+ && OpLevel(member) < MAXOPLEVEL))) {
+ int equal = (OpLevel(member) == OpLevel(state->member));
+ send_reply(state->sptr, ERR_NOTLOWEROPLEVEL,
+ cli_name(state->cli_change[i].client),
+ state->chptr->chname,
+ OpLevel(state->member), OpLevel(member),
+ "deop", equal ? "the same" : "a higher");
+ continue;
+ }
+ }
+ }
+
+ /* set op-level of member being opped */
+ if ((state->cli_change[i].flag & (MODE_ADD | MODE_CHANOP)) ==
+ (MODE_ADD | MODE_CHANOP)) {
+ /* If a valid oplevel was specified, use it.
+ * Otherwise, if being opped by an outsider, get MAXOPLEVEL.
+ * Otherwise, if not an apass channel, or state->member has
+ * MAXOPLEVEL, get oplevel MAXOPLEVEL.
+ * Otherwise, get state->member's oplevel+1.
+ */
+ if (state->cli_change[i].oplevel <= MAXOPLEVEL)
+ SetOpLevel(member, state->cli_change[i].oplevel);
+ else if (!state->member)
+ SetOpLevel(member, MAXOPLEVEL);
+ else if (OpLevel(state->member) >= MAXOPLEVEL)
+ SetOpLevel(member, OpLevel(state->member));
+ else
+ SetOpLevel(member, OpLevel(state->member) + 1);
+ }
+
+ /* actually effect the change */
+ if (state->flags & MODE_PARSE_SET) {
+ if (state->cli_change[i].flag & MODE_ADD) {
+ if (IsDelayedJoin(member) && !IsZombie(member))
+ RevealDelayedJoin(member);
+ member->status |= (state->cli_change[i].flag &
+ (MODE_CHANOP | MODE_VOICE));
+ if (state->cli_change[i].flag & MODE_CHANOP)
+ ClearDeopped(member);
+ } else
+ member->status &= ~(state->cli_change[i].flag &
+ (MODE_CHANOP | MODE_VOICE));
+ }
+
+ /* accumulate the change */
+ modebuf_mode_client(state->mbuf, state->cli_change[i].flag,
+ state->cli_change[i].client,
+ state->cli_change[i].oplevel);
+ } /* for (i = 0; state->cli_change[i].flags; i++) */
+}
+
+/*
+ * Helper function to process the simple modes
+ */
+static void
+mode_parse_mode(struct ParseState *state, int *flag_p)
+{
+ /* If they're not an oper, they can't change modes */
+ if (state->flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER)) {
+ send_notoper(state);
+ return;
+ }
+
+ if (!state->mbuf)
+ return;
+
+ /* Local users are not permitted to change registration status */
+ if (flag_p[0] == MODE_REGISTERED && !(state->flags & MODE_PARSE_FORCE) &&
+ MyUser(state->sptr))
+ return;
+
+ if (state->dir == MODE_ADD) {
+ state->add |= flag_p[0];
+ state->del &= ~flag_p[0];
+
+ if (flag_p[0] & MODE_SECRET) {
+ state->add &= ~MODE_PRIVATE;
+ state->del |= MODE_PRIVATE;
+ } else if (flag_p[0] & MODE_PRIVATE) {
+ state->add &= ~MODE_SECRET;
+ state->del |= MODE_SECRET;
+ }
+ } else {
+ state->add &= ~flag_p[0];
+ state->del |= flag_p[0];
+ }
+
+ assert(0 == (state->add & state->del));
+ assert((MODE_SECRET | MODE_PRIVATE) !=
+ (state->add & (MODE_SECRET | MODE_PRIVATE)));
+}
+
+/**
+ * This routine is intended to parse MODE or OPMODE commands and effect the
+ * changes (or just build the bounce buffer).
+ *
+ * \param[out] mbuf Receives parsed representation of mode change.
+ * \param[in] cptr Connection that sent the message to this server.
+ * \param[in] sptr Original source of the message.
+ * \param[in] chptr Channel whose modes are being changed.
+ * \param[in] parc Number of valid strings in \a parv.
+ * \param[in] parv Text arguments representing mode change, with the
+ * zero'th element containing a string like "+m" or "-o".
+ * \param[in] flags Set of bitwise MODE_PARSE_* flags.
+ * \param[in] member If non-null, the channel member attempting to change the modes.
+ */
+int
+mode_parse(struct ModeBuf *mbuf, struct Client *cptr, struct Client *sptr,
+ struct Channel *chptr, int parc, char *parv[], unsigned int flags,
+ struct Membership* member)
+{
+ static int chan_flags[] = {
+ MODE_CHANOP, 'o',
+ MODE_VOICE, 'v',
+ MODE_PRIVATE, 'p',
+ MODE_SECRET, 's',
+ MODE_MODERATED, 'm',
+ MODE_TOPICLIMIT, 't',
+ MODE_INVITEONLY, 'i',
+ MODE_NOPRIVMSGS, 'n',
+ MODE_KEY, 'k',
+ MODE_APASS, 'A',
+ MODE_UPASS, 'U',
+ MODE_REGISTERED, 'R',
+ MODE_BAN, 'b',
+ MODE_LIMIT, 'l',
+ MODE_REGONLY, 'r',
+ MODE_DELJOINS, 'D',
+ MODE_ADD, '+',
+ MODE_DEL, '-',
+ 0x0, 0x0
+ };
+ int i;
+ int *flag_p;
+ unsigned int t_mode;
+ char *modestr;
+ struct ParseState state;
+
+ assert(0 != cptr);
+ assert(0 != sptr);
+ assert(0 != chptr);
+ assert(0 != parc);
+ assert(0 != parv);
+
+ state.mbuf = mbuf;
+ state.cptr = cptr;
+ state.sptr = sptr;
+ state.chptr = chptr;
+ state.member = member;
+ state.parc = parc;
+ state.parv = parv;
+ state.flags = flags;
+ state.dir = MODE_ADD;
+ state.done = 0;
+ state.add = 0;
+ state.del = 0;
+ state.args_used = 0;
+ state.max_args = MAXMODEPARAMS;
+ state.numbans = 0;
+
+ for (i = 0; i < MAXPARA; i++) { /* initialize ops/voices arrays */
+ state.banlist[i].next = 0;
+ state.banlist[i].who[0] = '\0';
+ state.banlist[i].when = 0;
+ state.banlist[i].flags = 0;
+ state.cli_change[i].flag = 0;
+ state.cli_change[i].client = 0;
+ }
+
+ modestr = state.parv[state.args_used++];
+ state.parc--;
+
+ while (*modestr) {
+ for (; *modestr; modestr++) {
+ for (flag_p = chan_flags; flag_p[0]; flag_p += 2) /* look up flag */
+ if (flag_p[1] == *modestr)
+ break;
+
+ if (!flag_p[0]) { /* didn't find it? complain and continue */
+ if (MyUser(state.sptr))
+ send_reply(state.sptr, ERR_UNKNOWNMODE, *modestr);
+ continue;
+ }
+
+ switch (*modestr) {
+ case '+': /* switch direction to MODE_ADD */
+ case '-': /* switch direction to MODE_DEL */
+ state.dir = flag_p[0];
+ break;
+
+ case 'l': /* deal with limits */
+ mode_parse_limit(&state, flag_p);
+ break;
+
+ case 'k': /* deal with keys */
+ mode_parse_key(&state, flag_p);
+ break;
+
+ case 'A': /* deal with Admin passes */
+ if (IsServer(cptr) || feature_bool(FEAT_OPLEVELS))
+ mode_parse_apass(&state, flag_p);
+ break;
+
+ case 'U': /* deal with user passes */
+ if (IsServer(cptr) || feature_bool(FEAT_OPLEVELS))
+ mode_parse_upass(&state, flag_p);
+ break;
+
+ case 'b': /* deal with bans */
+ mode_parse_ban(&state, flag_p);
+ break;
+
+ case 'o': /* deal with ops/voice */
+ case 'v':
+ mode_parse_client(&state, flag_p);
+ break;
+
+ default: /* deal with other modes */
+ mode_parse_mode(&state, flag_p);
+ break;
+ } /* switch (*modestr) */
+ } /* for (; *modestr; modestr++) */
+
+ if (state.flags & MODE_PARSE_BURST)
+ break; /* don't interpret any more arguments */
+
+ if (state.parc > 0) { /* process next argument in string */
+ modestr = state.parv[state.args_used++];
+ state.parc--;
+
+ /* is it a TS? */
+ if (IsServer(state.cptr) && !state.parc && IsDigit(*modestr)) {
+ time_t recv_ts;
+
+ if (!(state.flags & MODE_PARSE_SET)) /* don't set earlier TS if */
+ break; /* we're then going to bounce the mode! */
+
+ recv_ts = atoi(modestr);
+
+ if (recv_ts && recv_ts < state.chptr->creationtime)
+ state.chptr->creationtime = recv_ts; /* respect earlier TS */
+ else if (recv_ts > state.chptr->creationtime) {
+ struct Client *sserv;
+
+ /* Check whether the originating server has fully processed
+ * the burst to it. */
+ sserv = state.cptr;
+ if (!IsServer(sserv))
+ sserv = cli_user(sserv)->server;
+ if (IsBurstOrBurstAck(sserv)) {
+ /* This is a legal but unusual case; the source server
+ * probably just has not processed the BURST for this
+ * channel. It SHOULD wipe out all its modes soon, so
+ * silently ignore the mode change rather than send a
+ * bounce that could desync modes from our side (that
+ * have already been sent).
+ */
+ state.mbuf->mb_add = 0;
+ state.mbuf->mb_rem = 0;
+ state.mbuf->mb_count = 0;
+ return state.args_used;
+ } else {
+ /* Server is desynced; bounce the mode and deop the source
+ * to fix it. */
+ state.flags &= ~MODE_PARSE_SET;
+ state.flags |= MODE_PARSE_BOUNCE;
+ state.mbuf->mb_dest &= ~(MODEBUF_DEST_CHANNEL | MODEBUF_DEST_HACK4);
+ state.mbuf->mb_dest |= MODEBUF_DEST_BOUNCE | MODEBUF_DEST_HACK2;
+ if (!IsServer(state.cptr))
+ state.mbuf->mb_dest |= MODEBUF_DEST_DEOP;
+ }
+ }
+
+ break; /* break out of while loop */
+ } else if (state.flags & MODE_PARSE_STRICT ||
+ (MyUser(state.sptr) && state.max_args <= 0)) {
+ state.parc++; /* we didn't actually gobble the argument */
+ state.args_used--;
+ break; /* break out of while loop */
+ }
+ }
+ } /* while (*modestr) */
+
+ /*
+ * the rest of the function finishes building resultant MODEs; if the
+ * origin isn't a member or an oper, skip it.
+ */
+ if (!state.mbuf || state.flags & (MODE_PARSE_NOTOPER | MODE_PARSE_NOTMEMBER))
+ return state.args_used; /* tell our parent how many args we gobbled */
+
+ t_mode = state.chptr->mode.mode;
+
+ if (state.del & t_mode) { /* delete any modes to be deleted... */
+ modebuf_mode(state.mbuf, MODE_DEL | (state.del & t_mode));
+
+ t_mode &= ~state.del;
+ }
+ if (state.add & ~t_mode) { /* add any modes to be added... */
+ modebuf_mode(state.mbuf, MODE_ADD | (state.add & ~t_mode));
+
+ t_mode |= state.add;
+ }
+
+ if (state.flags & MODE_PARSE_SET) { /* set the channel modes */
+ if ((state.chptr->mode.mode & MODE_INVITEONLY) &&
+ !(t_mode & MODE_INVITEONLY))
+ mode_invite_clear(state.chptr);
+
+ state.chptr->mode.mode = t_mode;
+ }
+
+ if (state.flags & MODE_PARSE_WIPEOUT) {
+ if (state.chptr->mode.limit && !(state.done & DONE_LIMIT))
+ modebuf_mode_uint(state.mbuf, MODE_DEL | MODE_LIMIT,
+ state.chptr->mode.limit);
+ if (*state.chptr->mode.key && !(state.done & DONE_KEY_DEL))
+ modebuf_mode_string(state.mbuf, MODE_DEL | MODE_KEY,
+ state.chptr->mode.key, 0);
+ if (*state.chptr->mode.upass && !(state.done & DONE_UPASS_DEL))
+ modebuf_mode_string(state.mbuf, MODE_DEL | MODE_UPASS,
+ state.chptr->mode.upass, 0);
+ if (*state.chptr->mode.apass && !(state.done & DONE_APASS_DEL))
+ modebuf_mode_string(state.mbuf, MODE_DEL | MODE_APASS,
+ state.chptr->mode.apass, 0);
+ }
+
+ if (state.done & DONE_BANCLEAN) /* process bans */
+ mode_process_bans(&state);
+
+ /* process client changes */
+ if (state.cli_change[0].flag)
+ mode_process_clients(&state);
+
+ return state.args_used; /* tell our parent how many args we gobbled */
+}
+
+/*
+ * Initialize a join buffer
+ */
+void
+joinbuf_init(struct JoinBuf *jbuf, struct Client *source,
+ struct Client *connect, unsigned int type, char *comment,
+ time_t create)
+{
+ int i;
+
+ assert(0 != jbuf);
+ assert(0 != source);
+ assert(0 != connect);
+
+ jbuf->jb_source = source; /* just initialize struct JoinBuf */
+ jbuf->jb_connect = connect;
+ jbuf->jb_type = type;
+ jbuf->jb_comment = comment;
+ jbuf->jb_create = create;
+ jbuf->jb_count = 0;
+ jbuf->jb_strlen = (((type == JOINBUF_TYPE_JOIN ||
+ type == JOINBUF_TYPE_PART ||
+ type == JOINBUF_TYPE_PARTALL) ?
+ STARTJOINLEN : STARTCREATELEN) +
+ (comment ? strlen(comment) + 2 : 0));
+
+ for (i = 0; i < MAXJOINARGS; i++)
+ jbuf->jb_channels[i] = 0;
+}
+
+/*
+ * Add a channel to the join buffer
+ */
+void
+joinbuf_join(struct JoinBuf *jbuf, struct Channel *chan, unsigned int flags)
+{
+ unsigned int len;
+ int is_local;
+
+ assert(0 != jbuf);
+
+ if (!chan) {
+ sendcmdto_serv_butone(jbuf->jb_source, CMD_JOIN, jbuf->jb_connect, "0");
+ return;
+ }
+
+ is_local = IsLocalChannel(chan->chname);
+
+ if (jbuf->jb_type == JOINBUF_TYPE_PART ||
+ jbuf->jb_type == JOINBUF_TYPE_PARTALL) {
+ struct Membership *member = find_member_link(chan, jbuf->jb_source);
+ if (IsUserParting(member))
+ return;
+ SetUserParting(member);
+
+ /* Send notification to channel */
+ if (!(flags & (CHFL_ZOMBIE | CHFL_DELAYED)))
+ sendcmdto_channel_butserv_butone(jbuf->jb_source, CMD_PART, chan, NULL, 0,
+ (flags & CHFL_BANNED || !jbuf->jb_comment) ?
+ ":%H" : "%H :%s", chan, jbuf->jb_comment);
+ else if (MyUser(jbuf->jb_source))
+ sendcmdto_one(jbuf->jb_source, CMD_PART, jbuf->jb_source,
+ (flags & CHFL_BANNED || !jbuf->jb_comment) ?
+ ":%H" : "%H :%s", chan, jbuf->jb_comment);
+ /* XXX: Shouldn't we send a PART here anyway? */
+ /* to users on the channel? Why? From their POV, the user isn't on
+ * the channel anymore anyway. We don't send to servers until below,
+ * when we gang all the channel parts together. Note that this is
+ * exactly the same logic, albeit somewhat more concise, as was in
+ * the original m_part.c */
+
+ if (jbuf->jb_type == JOINBUF_TYPE_PARTALL ||
+ is_local) /* got to remove user here */
+ remove_user_from_channel(jbuf->jb_source, chan);
+ } else {
+ int oplevel = !chan->mode.apass[0] ? MAXOPLEVEL
+ : (flags & CHFL_CHANNEL_MANAGER) ? 0
+ : 1;
+ /* Add user to channel */
+ if ((chan->mode.mode & MODE_DELJOINS) && !(flags & CHFL_VOICED_OR_OPPED))
+ add_user_to_channel(chan, jbuf->jb_source, flags | CHFL_DELAYED, oplevel);
+ else
+ add_user_to_channel(chan, jbuf->jb_source, flags, oplevel);
+
+ /* send JOIN notification to all servers (CREATE is sent later). */
+ if (jbuf->jb_type != JOINBUF_TYPE_CREATE && !is_local)
+ sendcmdto_serv_butone(jbuf->jb_source, CMD_JOIN, jbuf->jb_connect,
+ "%H %Tu", chan, chan->creationtime);
+
+ if (!((chan->mode.mode & MODE_DELJOINS) && !(flags & CHFL_VOICED_OR_OPPED))) {
+ /* Send the notification to the channel */
+ sendcmdto_channel_butserv_butone(jbuf->jb_source, CMD_JOIN, chan, NULL, 0, "%H", chan);
+
+ /* send an op, too, if needed */
+ if (flags & CHFL_CHANOP && (oplevel < MAXOPLEVEL || !MyUser(jbuf->jb_source)))
+ sendcmdto_channel_butserv_butone((chan->mode.apass[0] ? &his : jbuf->jb_source),
+ CMD_MODE, chan, NULL, 0, "%H +o %C",
+ chan, jbuf->jb_source);
+ } else if (MyUser(jbuf->jb_source))
+ sendcmdto_one(jbuf->jb_source, CMD_JOIN, jbuf->jb_source, ":%H", chan);
+ }
+
+ if (jbuf->jb_type == JOINBUF_TYPE_PARTALL ||
+ jbuf->jb_type == JOINBUF_TYPE_JOIN || is_local)
+ return; /* don't send to remote */
+
+ /* figure out if channel name will cause buffer to be overflowed */
+ len = chan ? strlen(chan->chname) + 1 : 2;
+ if (jbuf->jb_strlen + len > BUFSIZE)
+ joinbuf_flush(jbuf);
+
+ /* add channel to list of channels to send and update counts */
+ jbuf->jb_channels[jbuf->jb_count++] = chan;
+ jbuf->jb_strlen += len;
+
+ /* if we've used up all slots, flush */
+ if (jbuf->jb_count >= MAXJOINARGS)
+ joinbuf_flush(jbuf);
+}
+
+/*
+ * Flush the channel list to remote servers
+ */
+int
+joinbuf_flush(struct JoinBuf *jbuf)
+{
+ char chanlist[BUFSIZE];
+ int chanlist_i = 0;
+ int i;
+
+ if (!jbuf->jb_count || jbuf->jb_type == JOINBUF_TYPE_PARTALL ||
+ jbuf->jb_type == JOINBUF_TYPE_JOIN)
+ return 0; /* no joins to process */
+
+ for (i = 0; i < jbuf->jb_count; i++) { /* build channel list */
+ build_string(chanlist, &chanlist_i,
+ jbuf->jb_channels[i] ? jbuf->jb_channels[i]->chname : "0", 0,
+ i == 0 ? '\0' : ',');
+ if (JOINBUF_TYPE_PART == jbuf->jb_type)
+ /* Remove user from channel */
+ remove_user_from_channel(jbuf->jb_source, jbuf->jb_channels[i]);
+
+ jbuf->jb_channels[i] = 0; /* mark slot empty */
+ }
+
+ jbuf->jb_count = 0; /* reset base counters */
+ jbuf->jb_strlen = ((jbuf->jb_type == JOINBUF_TYPE_PART ?
+ STARTJOINLEN : STARTCREATELEN) +
+ (jbuf->jb_comment ? strlen(jbuf->jb_comment) + 2 : 0));
+
+ /* and send the appropriate command */
+ switch (jbuf->jb_type) {
+ case JOINBUF_TYPE_CREATE:
+ sendcmdto_serv_butone(jbuf->jb_source, CMD_CREATE, jbuf->jb_connect,
+ "%s %Tu", chanlist, jbuf->jb_create);
+ break;
+
+ case JOINBUF_TYPE_PART:
+ sendcmdto_serv_butone(jbuf->jb_source, CMD_PART, jbuf->jb_connect,
+ jbuf->jb_comment ? "%s :%s" : "%s", chanlist,
+ jbuf->jb_comment);
+ break;
+ }
+
+ return 0;
+}
+
+/* Returns TRUE (1) if client is invited, FALSE (0) if not */
+int IsInvited(struct Client* cptr, const void* chptr)
+{
+ struct SLink *lp;
+
+ for (lp = (cli_user(cptr))->invited; lp; lp = lp->next)
+ if (lp->value.chptr == chptr)
+ return 1;
+ return 0;
+}
+
+/* RevealDelayedJoin: sends a join for a hidden user */
+
+void RevealDelayedJoin(struct Membership *member)
+{
+ ClearDelayedJoin(member);
+ sendcmdto_channel_butserv_butone(member->user, CMD_JOIN, member->channel, member->user, 0, ":%H",
+ member->channel);
+ CheckDelayedJoins(member->channel);
+}
+
+/* CheckDelayedJoins: checks and clear +d if necessary */
+
+void CheckDelayedJoins(struct Channel *chan)
+{
+ if ((chan->mode.mode & MODE_WASDELJOINS) && !find_delayed_joins(chan)) {
+ chan->mode.mode &= ~MODE_WASDELJOINS;
+ sendcmdto_channel_butserv_butone(&his, CMD_MODE, chan, NULL, 0,
+ "%H -d", chan);
+ }
+}
+
+/** Send a join for the user if (s)he is a hidden member of the channel.
+ */
+void RevealDelayedJoinIfNeeded(struct Client *sptr, struct Channel *chptr)
+{
+ struct Membership *member = find_member_link(chptr, sptr);
+ if (member && IsDelayedJoin(member))
+ RevealDelayedJoin(member);
+}
projects / ircu2.10.12-pk.git / blobdiff