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+/*
+ * ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
+ *
+ * Copyright (C) 2002 by the past and present ircd coders, and others.
+ *
+ * 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 2 of the License, 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+/*! \file channel.c
+ * \brief Responsible for managing channels, members, bans and topics
+ * \version $Id$
+ */
+
+#include "stdinc.h"
+#include "list.h"
+#include "channel.h"
+#include "channel_mode.h"
+#include "client.h"
+#include "hash.h"
+#include "hostmask.h"
+#include "irc_string.h"
+#include "sprintf_irc.h"
+#include "ircd.h"
+#include "numeric.h"
+#include "s_serv.h" /* captab */
+#include "s_user.h"
+#include "send.h"
+#include "conf.h" /* ConfigFileEntry, ConfigChannel */
+#include "event.h"
+#include "memory.h"
+#include "balloc.h"
+
+struct config_channel_entry ConfigChannel;
+dlink_list global_channel_list = { NULL, NULL, 0 };
+BlockHeap *ban_heap; /*! \todo ban_heap shouldn't be a global var */
+
+static BlockHeap *member_heap = NULL;
+static BlockHeap *channel_heap = NULL;
+
+static char buf[IRCD_BUFSIZE];
+static char modebuf[MODEBUFLEN];
+static char parabuf[MODEBUFLEN];
+
+
+/*! \brief Initializes the channel blockheap, adds known channel CAPAB
+ */
+void
+init_channels(void)
+{
+ add_capability("EX", CAP_EX, 1);
+ add_capability("IE", CAP_IE, 1);
+ add_capability("CHW", CAP_CHW, 1);
+
+ channel_heap = BlockHeapCreate("channel", sizeof(struct Channel), CHANNEL_HEAP_SIZE);
+ ban_heap = BlockHeapCreate("ban", sizeof(struct Ban), BAN_HEAP_SIZE);
+ member_heap = BlockHeapCreate("member", sizeof(struct Membership), CHANNEL_HEAP_SIZE*2);
+}
+
+/*! \brief adds a user to a channel by adding another link to the
+ * channels member chain.
+ * \param chptr pointer to channel to add client to
+ * \param who pointer to client (who) to add
+ * \param flags flags for chanops etc
+ * \param flood_ctrl whether to count this join in flood calculations
+ */
+void
+add_user_to_channel(struct Channel *chptr, struct Client *who,
+ unsigned int flags, int flood_ctrl)
+{
+ struct Membership *ms = NULL;
+
+ if (GlobalSetOptions.joinfloodtime > 0)
+ {
+ if (flood_ctrl)
+ chptr->number_joined++;
+
+ chptr->number_joined -= (CurrentTime - chptr->last_join_time) *
+ (((float)GlobalSetOptions.joinfloodcount) /
+ (float)GlobalSetOptions.joinfloodtime);
+
+ if (chptr->number_joined <= 0)
+ {
+ chptr->number_joined = 0;
+ ClearJoinFloodNoticed(chptr);
+ }
+ else if (chptr->number_joined >= GlobalSetOptions.joinfloodcount)
+ {
+ chptr->number_joined = GlobalSetOptions.joinfloodcount;
+
+ if (!IsSetJoinFloodNoticed(chptr))
+ {
+ SetJoinFloodNoticed(chptr);
+ sendto_realops_flags(UMODE_BOTS, L_ALL,
+ "Possible Join Flooder %s on %s target: %s",
+ get_client_name(who, HIDE_IP),
+ who->servptr->name, chptr->chname);
+ }
+ }
+
+ chptr->last_join_time = CurrentTime;
+ }
+
+ ms = BlockHeapAlloc(member_heap);
+ ms->client_p = who;
+ ms->chptr = chptr;
+ ms->flags = flags;
+
+ dlinkAdd(ms, &ms->channode, &chptr->members);
+ dlinkAdd(ms, &ms->usernode, &who->channel);
+}
+
+/*! \brief deletes an user from a channel by removing a link in the
+ * channels member chain.
+ * \param member pointer to Membership struct
+ */
+void
+remove_user_from_channel(struct Membership *member)
+{
+ struct Client *client_p = member->client_p;
+ struct Channel *chptr = member->chptr;
+
+ dlinkDelete(&member->channode, &chptr->members);
+ dlinkDelete(&member->usernode, &client_p->channel);
+
+ BlockHeapFree(member_heap, member);
+
+ if (chptr->members.head == NULL)
+ destroy_channel(chptr);
+}
+
+/* send_members()
+ *
+ * inputs -
+ * output - NONE
+ * side effects -
+ */
+static void
+send_members(struct Client *client_p, struct Channel *chptr,
+ char *lmodebuf, char *lparabuf)
+{
+ struct Membership *ms;
+ dlink_node *ptr;
+ int tlen; /* length of text to append */
+ char *t, *start; /* temp char pointer */
+
+ start = t = buf + ircsprintf(buf, ":%s SJOIN %lu %s %s %s:",
+ ID_or_name(&me, client_p),
+ (unsigned long)chptr->channelts,
+ chptr->chname, lmodebuf, lparabuf);
+
+ DLINK_FOREACH(ptr, chptr->members.head)
+ {
+ ms = ptr->data;
+
+ tlen = strlen(IsCapable(client_p, CAP_TS6) ?
+ ID(ms->client_p) : ms->client_p->name) + 1; /* nick + space */
+
+ if (ms->flags & CHFL_CHANOP)
+ tlen++;
+#ifdef HALFOPS
+ else if (ms->flags & CHFL_HALFOP)
+ tlen++;
+#endif
+ if (ms->flags & CHFL_VOICE)
+ tlen++;
+
+ /* space will be converted into CR, but we also need space for LF..
+ * That's why we use '- 1' here
+ * -adx */
+ if (t + tlen - buf > IRCD_BUFSIZE - 1)
+ {
+ *(t - 1) = '\0'; /* kill the space and terminate the string */
+ sendto_one(client_p, "%s", buf);
+ t = start;
+ }
+
+ if ((ms->flags & (CHFL_CHANOP | CHFL_HALFOP)))
+ *t++ = (!(ms->flags & CHFL_CHANOP) && IsCapable(client_p, CAP_HOPS)) ?
+ '%' : '@';
+ if ((ms->flags & CHFL_VOICE))
+ *t++ = '+';
+
+ if (IsCapable(client_p, CAP_TS6))
+ strcpy(t, ID(ms->client_p));
+ else
+ strcpy(t, ms->client_p->name);
+ t += strlen(t);
+ *t++ = ' ';
+ }
+
+ /* should always be non-NULL unless we have a kind of persistent channels */
+ if (chptr->members.head != NULL)
+ t--; /* take the space out */
+ *t = '\0';
+ sendto_one(client_p, "%s", buf);
+}
+
+/*! \brief sends +b/+e/+I
+ * \param client_p client pointer to server
+ * \param chptr pointer to channel
+ * \param top pointer to top of mode link list to send
+ * \param flag char flag flagging type of mode. Currently this can be 'b', e' or 'I'
+ */
+static void
+send_mode_list(struct Client *client_p, struct Channel *chptr,
+ dlink_list *top, char flag)
+{
+ int ts5 = !IsCapable(client_p, CAP_TS6);
+ dlink_node *lp;
+ struct Ban *banptr;
+ char pbuf[IRCD_BUFSIZE];
+ int tlen, mlen, cur_len, count = 0;
+ char *mp = NULL, *pp = pbuf;
+
+ if (top == NULL || top->length == 0)
+ return;
+
+ if (ts5)
+ mlen = ircsprintf(buf, ":%s MODE %s +", me.name, chptr->chname);
+ else
+ mlen = ircsprintf(buf, ":%s BMASK %lu %s %c :", me.id,
+ (unsigned long)chptr->channelts, chptr->chname, flag);
+
+ /* MODE needs additional one byte for space between buf and pbuf */
+ cur_len = mlen + ts5;
+ mp = buf + mlen;
+
+ DLINK_FOREACH(lp, top->head)
+ {
+ banptr = lp->data;
+
+ /* must add another b/e/I letter if we use MODE */
+ tlen = banptr->len + 3 + ts5;
+
+ /*
+ * send buffer and start over if we cannot fit another ban,
+ * or if the target is non-ts6 and we have too many modes in
+ * in this line.
+ */
+ if (cur_len + (tlen - 1) > IRCD_BUFSIZE - 2 ||
+ (!IsCapable(client_p, CAP_TS6) &&
+ (count >= MAXMODEPARAMS || pp - pbuf >= MODEBUFLEN)))
+ {
+ *(pp - 1) = '\0'; /* get rid of trailing space on buffer */
+ sendto_one(client_p, "%s%s%s", buf, ts5 ? " " : "", pbuf);
+
+ cur_len = mlen + ts5;
+ mp = buf + mlen;
+ pp = pbuf;
+ count = 0;
+ }
+
+ count++;
+ if (ts5)
+ {
+ *mp++ = flag;
+ *mp = '\0';
+ }
+
+ pp += ircsprintf(pp, "%s!%s@%s ", banptr->name, banptr->username,
+ banptr->host);
+ cur_len += tlen;
+ }
+
+ *(pp - 1) = '\0'; /* get rid of trailing space on buffer */
+ sendto_one(client_p, "%s%s%s", buf, ts5 ? " " : "", pbuf);
+}
+
+/*! \brief send "client_p" a full list of the modes for channel chptr
+ * \param client_p pointer to client client_p
+ * \param chptr pointer to channel pointer
+ */
+void
+send_channel_modes(struct Client *client_p, struct Channel *chptr)
+{
+ *modebuf = *parabuf = '\0';
+ channel_modes(chptr, client_p, modebuf, parabuf);
+ send_members(client_p, chptr, modebuf, parabuf);
+
+ send_mode_list(client_p, chptr, &chptr->banlist, 'b');
+
+ if (IsCapable(client_p, CAP_EX))
+ send_mode_list(client_p, chptr, &chptr->exceptlist, 'e');
+ if (IsCapable(client_p, CAP_IE))
+ send_mode_list(client_p, chptr, &chptr->invexlist, 'I');
+}
+
+/*! \brief check channel name for invalid characters
+ * \param name pointer to channel name string
+ * \param local indicates whether it's a local or remote creation
+ * \return 0 if invalid, 1 otherwise
+ */
+int
+check_channel_name(const char *name, int local)
+{
+ const char *p = name;
+ const int max_length = local ? LOCAL_CHANNELLEN : CHANNELLEN;
+ assert(name != NULL);
+
+ if (!IsChanPrefix(*p))
+ return 0;
+
+ if (!local || !ConfigChannel.disable_fake_channels)
+ {
+ while (*++p)
+ if (!IsChanChar(*p))
+ return 0;
+ }
+ else
+ {
+ while (*++p)
+ if (!IsVisibleChanChar(*p))
+ return 0;
+ }
+
+ return p - name <= max_length;
+}
+
+void
+remove_ban(struct Ban *bptr, dlink_list *list)
+{
+ dlinkDelete(&bptr->node, list);
+
+ MyFree(bptr->name);
+ MyFree(bptr->username);
+ MyFree(bptr->host);
+ MyFree(bptr->who);
+
+ BlockHeapFree(ban_heap, bptr);
+}
+
+/* free_channel_list()
+ *
+ * inputs - pointer to dlink_list
+ * output - NONE
+ * side effects -
+ */
+void
+free_channel_list(dlink_list *list)
+{
+ dlink_node *ptr = NULL, *next_ptr = NULL;
+
+ DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
+ remove_ban(ptr->data, list);
+
+ assert(list->tail == NULL && list->head == NULL);
+}
+
+/*! \brief Get Channel block for chname (and allocate a new channel
+ * block, if it didn't exist before)
+ * \param chname channel name
+ * \return channel block
+ */
+struct Channel *
+make_channel(const char *chname)
+{
+ struct Channel *chptr = NULL;
+
+ assert(!EmptyString(chname));
+
+ chptr = BlockHeapAlloc(channel_heap);
+
+ /* doesn't hurt to set it here */
+ chptr->channelts = CurrentTime;
+ chptr->last_join_time = CurrentTime;
+
+ strlcpy(chptr->chname, chname, sizeof(chptr->chname));
+ dlinkAdd(chptr, &chptr->node, &global_channel_list);
+
+ hash_add_channel(chptr);
+
+ return chptr;
+}
+
+/*! \brief walk through this channel, and destroy it.
+ * \param chptr channel pointer
+ */
+void
+destroy_channel(struct Channel *chptr)
+{
+ dlink_node *ptr = NULL, *ptr_next = NULL;
+
+ DLINK_FOREACH_SAFE(ptr, ptr_next, chptr->invites.head)
+ del_invite(chptr, ptr->data);
+
+ /* free ban/exception/invex lists */
+ free_channel_list(&chptr->banlist);
+ free_channel_list(&chptr->exceptlist);
+ free_channel_list(&chptr->invexlist);
+
+ dlinkDelete(&chptr->node, &global_channel_list);
+ hash_del_channel(chptr);
+
+ BlockHeapFree(channel_heap, chptr);
+}
+
+/*!
+ * \param chptr pointer to channel
+ * \return string pointer "=" if public, "@" if secret else "*"
+ */
+static const char *
+channel_pub_or_secret(const struct Channel *chptr)
+{
+ if (SecretChannel(chptr))
+ return "@";
+ if (PrivateChannel(chptr))
+ return "*";
+ return "=";
+}
+
+/*! \brief lists all names on given channel
+ * \param source_p pointer to client struct requesting names
+ * \param chptr pointer to channel block
+ * \param show_eon show ENDOFNAMES numeric or not
+ * (don't want it with /names with no params)
+ */
+void
+channel_member_names(struct Client *source_p, struct Channel *chptr,
+ int show_eon)
+{
+ struct Client *target_p = NULL;
+ struct Membership *ms = NULL;
+ dlink_node *ptr = NULL;
+ char lbuf[IRCD_BUFSIZE + 1];
+ char *t = NULL, *start = NULL;
+ int tlen = 0;
+ int is_member = IsMember(source_p, chptr);
+ int multi_prefix = HasCap(source_p, CAP_MULTI_PREFIX) != 0;
+
+ if (PubChannel(chptr) || is_member)
+ {
+ t = lbuf + ircsprintf(lbuf, form_str(RPL_NAMREPLY),
+ me.name, source_p->name,
+ channel_pub_or_secret(chptr),
+ chptr->chname);
+ start = t;
+
+ DLINK_FOREACH(ptr, chptr->members.head)
+ {
+ ms = ptr->data;
+ target_p = ms->client_p;
+
+ if (HasUMode(target_p, UMODE_INVISIBLE) && !is_member)
+ continue;
+
+ tlen = strlen(target_p->name) + 1; /* nick + space */
+
+ if (!multi_prefix)
+ {
+ if (ms->flags & (CHFL_CHANOP | CHFL_HALFOP | CHFL_VOICE))
+ ++tlen;
+ }
+ else
+ {
+ if (ms->flags & CHFL_CHANOP)
+ ++tlen;
+ if (ms->flags & CHFL_HALFOP)
+ ++tlen;
+ if (ms->flags & CHFL_VOICE)
+ ++tlen;
+ }
+
+ if (t + tlen - lbuf > IRCD_BUFSIZE - 2)
+ {
+ *(t - 1) = '\0';
+ sendto_one(source_p, "%s", lbuf);
+ t = start;
+ }
+
+ t += ircsprintf(t, "%s%s ", get_member_status(ms, multi_prefix),
+ target_p->name);
+ }
+
+ if (tlen != 0)
+ {
+ *(t - 1) = '\0';
+ sendto_one(source_p, "%s", lbuf);
+ }
+ }
+
+ if (show_eon)
+ sendto_one(source_p, form_str(RPL_ENDOFNAMES),
+ me.name, source_p->name, chptr->chname);
+}
+
+/*! \brief adds client to invite list
+ * \param chptr pointer to channel block
+ * \param who pointer to client to add invite to
+ */
+void
+add_invite(struct Channel *chptr, struct Client *who)
+{
+ del_invite(chptr, who);
+
+ /*
+ * delete last link in chain if the list is max length
+ */
+ if (dlink_list_length(&who->localClient->invited) >=
+ ConfigChannel.max_chans_per_user)
+ del_invite(who->localClient->invited.tail->data, who);
+
+ /* add client to channel invite list */
+ dlinkAdd(who, make_dlink_node(), &chptr->invites);
+
+ /* add channel to the end of the client invite list */
+ dlinkAdd(chptr, make_dlink_node(), &who->localClient->invited);
+}
+
+/*! \brief Delete Invite block from channel invite list
+ * and client invite list
+ * \param chptr pointer to Channel struct
+ * \param who pointer to client to remove invites from
+ */
+void
+del_invite(struct Channel *chptr, struct Client *who)
+{
+ dlink_node *ptr = NULL;
+
+ if ((ptr = dlinkFindDelete(&who->localClient->invited, chptr)))
+ free_dlink_node(ptr);
+
+ if ((ptr = dlinkFindDelete(&chptr->invites, who)))
+ free_dlink_node(ptr);
+}
+
+/* get_member_status()
+ *
+ * inputs - pointer to struct Membership
+ * - YES if we can combine different flags
+ * output - string either @, +, % or "" depending on whether
+ * chanop, voiced or user
+ * side effects -
+ *
+ * NOTE: Returned string is usually a static buffer
+ * (like in get_client_name)
+ */
+const char *
+get_member_status(const struct Membership *ms, int combine)
+{
+ static char buffer[4];
+ char *p = NULL;
+
+ if (ms == NULL)
+ return "";
+ p = buffer;
+
+ if (ms->flags & CHFL_CHANOP)
+ {
+ if (!combine)
+ return "@";
+ *p++ = '@';
+ }
+
+#ifdef HALFOPS
+ if (ms->flags & CHFL_HALFOP)
+ {
+ if (!combine)
+ return "%";
+ *p++ = '%';
+ }
+#endif
+
+ if (ms->flags & CHFL_VOICE)
+ *p++ = '+';
+ *p = '\0';
+
+ return buffer;
+}
+
+/*!
+ * \param who pointer to Client to check
+ * \param list pointer to ban list to search
+ * \return 1 if ban found for given n!u\@h mask, 0 otherwise
+ *
+ */
+static int
+find_bmask(const struct Client *who, const dlink_list *const list)
+{
+ const dlink_node *ptr = NULL;
+
+ DLINK_FOREACH(ptr, list->head)
+ {
+ const struct Ban *bp = ptr->data;
+
+ if (match(bp->name, who->name) && match(bp->username, who->username))
+ {
+ switch (bp->type)
+ {
+ case HM_HOST:
+ if (match(bp->host, who->host) || match(bp->host, who->sockhost))
+ return 1;
+ break;
+ case HM_IPV4:
+ if (who->localClient->aftype == AF_INET)
+ if (match_ipv4(&who->localClient->ip, &bp->addr, bp->bits))
+ return 1;
+ break;
+#ifdef IPV6
+ case HM_IPV6:
+ if (who->localClient->aftype == AF_INET6)
+ if (match_ipv6(&who->localClient->ip, &bp->addr, bp->bits))
+ return 1;
+ break;
+#endif
+ default:
+ assert(0);
+ }
+ }
+ }
+
+ return 0;
+}
+
+/*!
+ * \param chptr pointer to channel block
+ * \param who pointer to client to check access fo
+ * \return 0 if not banned, 1 otherwise
+ */
+int
+is_banned(const struct Channel *chptr, const struct Client *who)
+{
+ if (find_bmask(who, &chptr->banlist))
+ if (!find_bmask(who, &chptr->exceptlist))
+ return 1;
+
+ return 0;
+}
+
+/*!
+ * \param source_p pointer to client attempting to join
+ * \param chptr pointer to channel
+ * \param key key sent by client attempting to join if present
+ * \return ERR_BANNEDFROMCHAN, ERR_INVITEONLYCHAN, ERR_CHANNELISFULL
+ * or 0 if allowed to join.
+ */
+int
+can_join(struct Client *source_p, struct Channel *chptr, const char *key)
+{
+ if (is_banned(chptr, source_p))
+ return ERR_BANNEDFROMCHAN;
+
+#ifdef HAVE_LIBCRYPTO
+ if ((chptr->mode.mode & MODE_SSLONLY) && !source_p->localClient->fd.ssl)
+ return ERR_SSLONLYCHAN;
+#endif
+
+ if ((chptr->mode.mode & MODE_REGONLY) && !HasUMode(source_p, UMODE_REGISTERED))
+ return ERR_NEEDREGGEDNICK;
+
+ if ((chptr->mode.mode & MODE_OPERONLY) && !HasUMode(source_p, UMODE_OPER))
+ return ERR_OPERONLYCHAN;
+
+ if (chptr->mode.mode & MODE_INVITEONLY)
+ if (!dlinkFind(&source_p->localClient->invited, chptr))
+ if (!find_bmask(source_p, &chptr->invexlist))
+ return ERR_INVITEONLYCHAN;
+
+ if (chptr->mode.key[0] && (!key || strcmp(chptr->mode.key, key)))
+ return ERR_BADCHANNELKEY;
+
+ if (chptr->mode.limit && dlink_list_length(&chptr->members) >=
+ chptr->mode.limit)
+ return ERR_CHANNELISFULL;
+
+ return 0;
+}
+
+int
+has_member_flags(struct Membership *ms, unsigned int flags)
+{
+ if (ms != NULL)
+ return ms->flags & flags;
+ return 0;
+}
+
+struct Membership *
+find_channel_link(struct Client *client_p, struct Channel *chptr)
+{
+ dlink_node *ptr = NULL;
+
+ if (!IsClient(client_p))
+ return NULL;
+
+ DLINK_FOREACH(ptr, client_p->channel.head)
+ if (((struct Membership *)ptr->data)->chptr == chptr)
+ return ptr->data;
+
+ return NULL;
+}
+
+/*!
+ * \param chptr pointer to Channel struct
+ * \param source_p pointer to Client struct
+ * \param ms pointer to Membership struct (can be NULL)
+ * \return CAN_SEND_OPV if op or voiced on channel\n
+ * CAN_SEND_NONOP if can send to channel but is not an op\n
+ * ERR_CANNOTSENDTOCHAN or ERR_NEEDREGGEDNICK if they cannot send to channel\n
+ */
+int
+can_send(struct Channel *chptr, struct Client *source_p, struct Membership *ms)
+{
+ if (IsServer(source_p) || HasFlag(source_p, FLAGS_SERVICE))
+ return CAN_SEND_OPV;
+
+ if (MyClient(source_p) && !IsExemptResv(source_p))
+ if (!(HasUMode(source_p, UMODE_OPER) && ConfigFileEntry.oper_pass_resv))
+ if (!hash_find_resv(chptr->chname) == ConfigChannel.restrict_channels)
+ return ERR_CANNOTSENDTOCHAN;
+
+ if (ms != NULL || (ms = find_channel_link(source_p, chptr)))
+ {
+ if (ms->flags & (CHFL_CHANOP|CHFL_HALFOP|CHFL_VOICE))
+ return CAN_SEND_OPV;
+
+ /* cache can send if quiet_on_ban and banned */
+ if (ConfigChannel.quiet_on_ban && MyClient(source_p))
+ {
+ if (ms->flags & CHFL_BAN_SILENCED)
+ return ERR_CANNOTSENDTOCHAN;
+
+ if (!(ms->flags & CHFL_BAN_CHECKED))
+ {
+ if (is_banned(chptr, source_p))
+ {
+ ms->flags |= (CHFL_BAN_CHECKED|CHFL_BAN_SILENCED);
+ return ERR_CANNOTSENDTOCHAN;
+ }
+
+ ms->flags |= CHFL_BAN_CHECKED;
+ }
+ }
+ }
+ else if (chptr->mode.mode & MODE_NOPRIVMSGS)
+ return ERR_CANNOTSENDTOCHAN;
+
+ if (chptr->mode.mode & MODE_MODERATED)
+ return ERR_CANNOTSENDTOCHAN;
+
+ return CAN_SEND_NONOP;
+}
+
+/*! \brief Updates the client's oper_warn_count_down, warns the
+ * IRC operators if necessary, and updates
+ * join_leave_countdown as needed.
+ * \param source_p pointer to struct Client to check
+ * \param name channel name or NULL if this is a part.
+ */
+void
+check_spambot_warning(struct Client *source_p, const char *name)
+{
+ int t_delta = 0;
+ int decrement_count = 0;
+
+ if ((GlobalSetOptions.spam_num &&
+ (source_p->localClient->join_leave_count >=
+ GlobalSetOptions.spam_num)))
+ {
+ if (source_p->localClient->oper_warn_count_down > 0)
+ source_p->localClient->oper_warn_count_down--;
+ else
+ source_p->localClient->oper_warn_count_down = 0;
+
+ if (source_p->localClient->oper_warn_count_down == 0)
+ {
+ /* Its already known as a possible spambot */
+ if (name != NULL)
+ sendto_realops_flags(UMODE_BOTS, L_ALL,
+ "User %s (%s@%s) trying to join %s is a possible spambot",
+ source_p->name, source_p->username,
+ source_p->host, name);
+ else
+ sendto_realops_flags(UMODE_BOTS, L_ALL,
+ "User %s (%s@%s) is a possible spambot",
+ source_p->name, source_p->username,
+ source_p->host);
+ source_p->localClient->oper_warn_count_down = OPER_SPAM_COUNTDOWN;
+ }
+ }
+ else
+ {
+ if ((t_delta = (CurrentTime - source_p->localClient->last_leave_time)) >
+ JOIN_LEAVE_COUNT_EXPIRE_TIME)
+ {
+ decrement_count = (t_delta / JOIN_LEAVE_COUNT_EXPIRE_TIME);
+ if (decrement_count > source_p->localClient->join_leave_count)
+ source_p->localClient->join_leave_count = 0;
+ else
+ source_p->localClient->join_leave_count -= decrement_count;
+ }
+ else
+ {
+ if ((CurrentTime - (source_p->localClient->last_join_time)) <
+ GlobalSetOptions.spam_time)
+ {
+ /* oh, its a possible spambot */
+ source_p->localClient->join_leave_count++;
+ }
+ }
+
+ if (name != NULL)
+ source_p->localClient->last_join_time = CurrentTime;
+ else
+ source_p->localClient->last_leave_time = CurrentTime;
+ }
+}
+
+/*! \brief compares usercount and servercount against their split
+ * values and adjusts splitmode accordingly
+ * \param unused Unused address pointer
+ */
+void
+check_splitmode(void *unused)
+{
+ if (splitchecking && (ConfigChannel.no_join_on_split ||
+ ConfigChannel.no_create_on_split))
+ {
+ const unsigned int server = dlink_list_length(&global_serv_list);
+
+ if (!splitmode && ((server < split_servers) || (Count.total < split_users)))
+ {
+ splitmode = 1;
+
+ sendto_realops_flags(UMODE_ALL,L_ALL,
+ "Network split, activating splitmode");
+ eventAddIsh("check_splitmode", check_splitmode, NULL, 10);
+ }
+ else if (splitmode && (server > split_servers) && (Count.total > split_users))
+ {
+ splitmode = 0;
+
+ sendto_realops_flags(UMODE_ALL, L_ALL,
+ "Network rejoined, deactivating splitmode");
+ eventDelete(check_splitmode, NULL);
+ }
+ }
+}
+
+/*! \brief Sets the channel topic for chptr
+ * \param chptr Pointer to struct Channel
+ * \param topic The topic string
+ * \param topic_info n!u\@h formatted string of the topic setter
+ * \param topicts timestamp on the topic
+ */
+void
+set_channel_topic(struct Channel *chptr, const char *topic,
+ const char *topic_info, time_t topicts)
+{
+ strlcpy(chptr->topic, topic, sizeof(chptr->topic));
+ strlcpy(chptr->topic_info, topic_info, sizeof(chptr->topic_info));
+ chptr->topic_time = topicts;
+}