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channel.c
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/*
* ircd-ratbox: A slightly useful ircd.
* channel.c: Controls channels.
*
* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
* Copyright (C) 1996-2002 Hybrid Development Team
* Copyright (C) 2002-2005 ircd-ratbox development team
*
* 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
*/
#include "stdinc.h"
#include "channel.h"
#include "chmode.h"
#include "client.h"
#include "hash.h"
#include "hook.h"
#include "match.h"
#include "ircd.h"
#include "numeric.h"
#include "s_serv.h" /* captab */
#include "s_user.h"
#include "send.h"
#include "whowas.h"
#include "s_conf.h" /* ConfigFileEntry, ConfigChannel */
#include "s_newconf.h"
#include "logger.h"
#include "s_assert.h"
struct config_channel_entry ConfigChannel;
rb_dlink_list global_channel_list;
static rb_bh *channel_heap;
static rb_bh *ban_heap;
static rb_bh *topic_heap;
static rb_bh *member_heap;
static void free_topic(struct Channel *chptr);
static int h_can_join;
static int h_can_send;
int h_get_channel_access;
/* init_channels()
*
* input -
* output -
* side effects - initialises the various blockheaps
*/
void
init_channels(void)
{
channel_heap = rb_bh_create(sizeof(struct Channel), CHANNEL_HEAP_SIZE, "channel_heap");
ban_heap = rb_bh_create(sizeof(struct Ban), BAN_HEAP_SIZE, "ban_heap");
topic_heap = rb_bh_create(TOPICLEN + 1 + USERHOST_REPLYLEN, TOPIC_HEAP_SIZE, "topic_heap");
member_heap = rb_bh_create(sizeof(struct membership), MEMBER_HEAP_SIZE, "member_heap");
h_can_join = register_hook("can_join");
h_can_send = register_hook("can_send");
h_get_channel_access = register_hook("get_channel_access");
}
/*
* allocate_channel - Allocates a channel
*/
struct Channel *
allocate_channel(const char *chname)
{
struct Channel *chptr;
chptr = rb_bh_alloc(channel_heap);
chptr->chname = rb_strdup(chname);
return (chptr);
}
void
free_channel(struct Channel *chptr)
{
rb_free(chptr->chname);
rb_free(chptr->mode_lock);
rb_bh_free(channel_heap, chptr);
}
struct Ban *
allocate_ban(const char *banstr, const char *who, const char *forward)
{
struct Ban *bptr;
bptr = rb_bh_alloc(ban_heap);
bptr->banstr = rb_strdup(banstr);
bptr->who = rb_strdup(who);
bptr->forward = forward ? rb_strdup(forward) : NULL;
return (bptr);
}
void
free_ban(struct Ban *bptr)
{
rb_free(bptr->banstr);
rb_free(bptr->who);
rb_free(bptr->forward);
rb_bh_free(ban_heap, bptr);
}
/*
* send_channel_join()
*
* input - channel to join, client joining.
* output - none
* side effects - none
*/
void
send_channel_join(struct Channel *chptr, struct Client *client_p)
{
if (!IsClient(client_p))
return;
sendto_channel_local_with_capability(client_p, ALL_MEMBERS, NOCAPS, CLICAP_EXTENDED_JOIN, chptr, ":%s!%s@%s JOIN %s",
client_p->name, client_p->username, client_p->host, chptr->chname);
sendto_channel_local_with_capability(client_p, ALL_MEMBERS, CLICAP_EXTENDED_JOIN, NOCAPS, chptr, ":%s!%s@%s JOIN %s %s :%s",
client_p->name, client_p->username, client_p->host, chptr->chname,
EmptyString(client_p->user->suser) ? "*" : client_p->user->suser,
client_p->info);
/* Send away message to away-notify enabled clients. */
if (client_p->user->away)
sendto_channel_local_with_capability_butone(client_p, ALL_MEMBERS, CLICAP_AWAY_NOTIFY, NOCAPS, chptr,
":%s!%s@%s AWAY :%s", client_p->name, client_p->username,
client_p->host, client_p->user->away);
}
/* find_channel_membership()
*
* input - channel to find them in, client to find
* output - membership of client in channel, else NULL
* side effects -
*/
struct membership *
find_channel_membership(struct Channel *chptr, struct Client *client_p)
{
struct membership *msptr;
rb_dlink_node *ptr;
if(!IsClient(client_p))
return NULL;
/* Pick the most efficient list to use to be nice to things like
* CHANSERV which could be in a large number of channels
*/
if(rb_dlink_list_length(&chptr->members) < rb_dlink_list_length(&client_p->user->channel))
{
RB_DLINK_FOREACH(ptr, chptr->members.head)
{
msptr = ptr->data;
if(msptr->client_p == client_p)
return msptr;
}
}
else
{
RB_DLINK_FOREACH(ptr, client_p->user->channel.head)
{
msptr = ptr->data;
if(msptr->chptr == chptr)
return msptr;
}
}
return NULL;
}
/* find_channel_status()
*
* input - membership to get status for, whether we can combine flags
* output - flags of user on channel
* side effects -
*/
const char *
find_channel_status(struct membership *msptr, int combine)
{
static char buffer[3];
char *p;
p = buffer;
if(is_chanop(msptr))
{
if(!combine)
return "@";
*p++ = '@';
}
if(is_voiced(msptr))
*p++ = '+';
*p = '\0';
return buffer;
}
/* add_user_to_channel()
*
* input - channel to add client to, client to add, channel flags
* output -
* side effects - user is added to channel
*/
void
add_user_to_channel(struct Channel *chptr, struct Client *client_p, int flags)
{
struct membership *msptr;
rb_dlink_node *p;
s_assert(client_p->user != NULL);
if(client_p->user == NULL)
return;
msptr = rb_bh_alloc(member_heap);
msptr->chptr = chptr;
msptr->client_p = client_p;
msptr->flags = flags;
RB_DLINK_FOREACH(p, client_p->user->channel.head)
{
struct membership *ms2 = p->data;
if (irccmp(chptr->chname, ms2->chptr->chname) < 0)
break;
}
if (p == NULL)
rb_dlinkAddTail(msptr, &msptr->usernode, &client_p->user->channel);
else
rb_dlinkAddBefore(p, msptr, &msptr->usernode, &client_p->user->channel);
rb_dlinkAdd(msptr, &msptr->channode, &chptr->members);
if(MyClient(client_p))
rb_dlinkAdd(msptr, &msptr->locchannode, &chptr->locmembers);
}
/* remove_user_from_channel()
*
* input - membership pointer to remove from channel
* output -
* side effects - membership (thus user) is removed from channel
*/
void
remove_user_from_channel(struct membership *msptr)
{
struct Client *client_p;
struct Channel *chptr;
s_assert(msptr != NULL);
if(msptr == NULL)
return;
client_p = msptr->client_p;
chptr = msptr->chptr;
rb_dlinkDelete(&msptr->usernode, &client_p->user->channel);
rb_dlinkDelete(&msptr->channode, &chptr->members);
if(client_p->servptr == &me)
rb_dlinkDelete(&msptr->locchannode, &chptr->locmembers);
if(!(chptr->mode.mode & MODE_PERMANENT) && rb_dlink_list_length(&chptr->members) <= 0)
destroy_channel(chptr);
rb_bh_free(member_heap, msptr);
return;
}
/* remove_user_from_channels()
*
* input - user to remove from all channels
* output -
* side effects - user is removed from all channels
*/
void
remove_user_from_channels(struct Client *client_p)
{
struct Channel *chptr;
struct membership *msptr;
rb_dlink_node *ptr;
rb_dlink_node *next_ptr;
if(client_p == NULL)
return;
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, client_p->user->channel.head)
{
msptr = ptr->data;
chptr = msptr->chptr;
rb_dlinkDelete(&msptr->channode, &chptr->members);
if(client_p->servptr == &me)
rb_dlinkDelete(&msptr->locchannode, &chptr->locmembers);
if(!(chptr->mode.mode & MODE_PERMANENT) && rb_dlink_list_length(&chptr->members) <= 0)
destroy_channel(chptr);
rb_bh_free(member_heap, msptr);
}
client_p->user->channel.head = client_p->user->channel.tail = NULL;
client_p->user->channel.length = 0;
}
/* invalidate_bancache_user()
*
* input - user to invalidate ban cache for
* output -
* side effects - ban cache is invalidated for all memberships of that user
* to be used after a nick change
*/
void
invalidate_bancache_user(struct Client *client_p)
{
struct membership *msptr;
rb_dlink_node *ptr;
if(client_p == NULL)
return;
RB_DLINK_FOREACH(ptr, client_p->user->channel.head)
{
msptr = ptr->data;
msptr->bants = 0;
msptr->flags &= ~CHFL_BANNED;
}
}
/* check_channel_name()
*
* input - channel name
* output - true if valid channel name, else false
* side effects -
*/
bool
check_channel_name(const char *name)
{
s_assert(name != NULL);
if(name == NULL)
return false;
for (; *name; ++name)
{
if(!IsChanChar(*name))
return false;
}
return true;
}
/* free_channel_list()
*
* input - rb_dlink list to free
* output -
* side effects - list of b/e/I modes is cleared
*/
void
free_channel_list(rb_dlink_list * list)
{
rb_dlink_node *ptr;
rb_dlink_node *next_ptr;
struct Ban *actualBan;
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
{
actualBan = ptr->data;
free_ban(actualBan);
}
list->head = list->tail = NULL;
list->length = 0;
}
/* destroy_channel()
*
* input - channel to destroy
* output -
* side effects - channel is obliterated
*/
void
destroy_channel(struct Channel *chptr)
{
rb_dlink_node *ptr, *next_ptr;
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, chptr->invites.head)
{
del_invite(chptr, ptr->data);
}
/* free all bans/exceptions/denies */
free_channel_list(&chptr->banlist);
free_channel_list(&chptr->exceptlist);
free_channel_list(&chptr->invexlist);
free_channel_list(&chptr->quietlist);
/* Free the topic */
free_topic(chptr);
rb_dlinkDelete(&chptr->node, &global_channel_list);
del_from_channel_hash(chptr->chname, chptr);
free_channel(chptr);
}
/* channel_pub_or_secret()
*
* input - channel
* output - "=" if public, "@" if secret, else "*"
* side effects -
*/
static const char *
channel_pub_or_secret(struct Channel *chptr)
{
if(PubChannel(chptr))
return ("=");
else if(SecretChannel(chptr))
return ("@");
return ("*");
}
int
iter_comm_channels_step(rb_dlink_node *pos1, rb_dlink_node *pos2,
struct membership **ms1, struct membership **ms2,
struct Channel **chptr)
{
*ms1 = pos1 ? pos1->data : NULL;
*ms2 = pos2 ? pos2->data : NULL;
/* we're at the end */
if (*ms1 == NULL && *ms2 == NULL)
return 0;
/* one side is at the end, keep stepping the other one */
if (*ms1 == NULL || *ms2 == NULL)
{
*chptr = *ms1 != NULL ? (*ms1)->chptr : (*ms2)->chptr;
return 1;
}
/* common channel */
if ((*ms1)->chptr == (*ms2)->chptr)
{
*chptr = (*ms1)->chptr;
return 1;
}
/* null out the channel that's further ahead; we'll get to it later */
if (irccmp((*ms1)->chptr->chname, (*ms2)->chptr->chname) > 0)
{
*ms1 = NULL;
*chptr = (*ms2)->chptr;
return 1;
}
else
{
*ms2 = NULL;
*chptr = (*ms1)->chptr;
return 1;
}
}
/* channel_member_names()
*
* input - channel to list, client to list to, show endofnames
* output -
* side effects - client is given list of users on channel
*/
void
channel_member_names(struct Channel *chptr, struct Client *client_p, int show_eon)
{
struct membership *msptr;
struct Client *target_p;
rb_dlink_node *ptr;
int is_member;
int stack = IsCapable(client_p, CLICAP_MULTI_PREFIX);
if(ShowChannel(client_p, chptr))
{
is_member = IsMember(client_p, chptr);
send_multiline_init(client_p, " ", form_str(RPL_NAMREPLY),
me.name,
client_p->name,
channel_pub_or_secret(chptr),
chptr->chname);
RB_DLINK_FOREACH(ptr, chptr->members.head)
{
msptr = ptr->data;
target_p = msptr->client_p;
if(IsInvisible(target_p) && !is_member)
continue;
if (IsCapable(client_p, CLICAP_USERHOST_IN_NAMES))
{
send_multiline_item(client_p, "%s%s!%s@%s",
find_channel_status(msptr, stack),
target_p->name,
target_p->username,
target_p->host);
}
else
{
send_multiline_item(client_p, "%s%s",
find_channel_status(msptr, stack),
target_p->name);
}
}
send_multiline_fini(client_p, NULL);
}
if(show_eon)
sendto_one(client_p, form_str(RPL_ENDOFNAMES),
me.name, client_p->name, chptr->chname);
}
/* del_invite()
*
* input - channel to remove invite from, client to remove
* output -
* side effects - user is removed from invite list, if exists
*/
void
del_invite(struct Channel *chptr, struct Client *who)
{
rb_dlinkFindDestroy(who, &chptr->invites);
rb_dlinkFindDestroy(chptr, &who->user->invited);
}
/* is_banned_list()
*
* input - channel to check bans for, ban list (banlist or quietlist),
* user to check bans against, optional prebuilt buffers,
* optional forward channel pointer
* output - 1 if banned, else 0
* side effects -
*/
static int
is_banned_list(struct Channel *chptr, rb_dlink_list *list,
struct Client *who, struct membership *msptr,
const struct matchset *ms, const char **forward)
{
struct matchset ms_;
rb_dlink_node *ptr;
struct Ban *actualBan = NULL;
struct Ban *actualExcept = NULL;
if (!MyClient(who))
return 0;
if (ms == NULL)
{
matchset_for_client(who, &ms_);
ms = &ms_;
}
RB_DLINK_FOREACH(ptr, list->head)
{
actualBan = ptr->data;
if (matches_mask(ms, actualBan->banstr))
break;
if (match_extban(actualBan->banstr, who, chptr, CHFL_BAN))
break;
actualBan = NULL;
}
if ((actualBan != NULL) && ConfigChannel.use_except)
{
RB_DLINK_FOREACH(ptr, chptr->exceptlist.head)
{
actualExcept = ptr->data;
/* theyre exempted.. */
if (matches_mask(ms, actualExcept->banstr) ||
match_extban(actualExcept->banstr, who, chptr, CHFL_EXCEPTION))
{
/* cache the fact theyre not banned */
if(msptr != NULL)
{
msptr->bants = chptr->bants;
msptr->flags &= ~CHFL_BANNED;
}
return CHFL_EXCEPTION;
}
}
}
/* cache the banned/not banned status */
if(msptr != NULL)
{
msptr->bants = chptr->bants;
if(actualBan != NULL)
{
msptr->flags |= CHFL_BANNED;
return CHFL_BAN;
}
else
{
msptr->flags &= ~CHFL_BANNED;
return 0;
}
}
if (actualBan && actualBan->forward && forward)
*forward = actualBan->forward;
return ((actualBan ? CHFL_BAN : 0));
}
/* is_banned()
*
* input - channel to check bans for, user to check bans against
* optional prebuilt buffers, optional forward channel pointer
* output - 1 if banned, else 0
* side effects -
*/
int
is_banned(struct Channel *chptr, struct Client *who, struct membership *msptr,
const struct matchset *ms, const char **forward)
{
#if 0
if (chptr->last_checked_client != NULL &&
who == chptr->last_checked_client &&
chptr->last_checked_type == CHFL_BAN &&
chptr->last_checked_ts > chptr->bants)
return chptr->last_checked_result;
chptr->last_checked_client = who;
chptr->last_checked_type = CHFL_BAN;
chptr->last_checked_result = is_banned_list(chptr, &chptr->banlist, who, msptr, s, s2, forward);
chptr->last_checked_ts = rb_current_time();
return chptr->last_checked_result;
#else
return is_banned_list(chptr, &chptr->banlist, who, msptr, ms, forward);
#endif
}
/* is_quieted()
*
* input - channel to check bans for, user to check bans against
* optional prebuilt buffers
* output - 1 if banned, else 0
* side effects -
*/
int
is_quieted(struct Channel *chptr, struct Client *who, struct membership *msptr,
const struct matchset *ms)
{
#if 0
if (chptr->last_checked_client != NULL &&
who == chptr->last_checked_client &&
chptr->last_checked_type == CHFL_QUIET &&
chptr->last_checked_ts > chptr->bants)
return chptr->last_checked_result;
chptr->last_checked_client = who;
chptr->last_checked_type = CHFL_QUIET;
chptr->last_checked_result = is_banned_list(chptr, &chptr->quietlist, who, msptr, s, s2, NULL);
chptr->last_checked_ts = rb_current_time();
return chptr->last_checked_result;
#else
return is_banned_list(chptr, &chptr->quietlist, who, msptr, ms, NULL);
#endif
}
/* can_join()
*
* input - client to check, channel to check for, key
* output - reason for not being able to join, else 0, channel name to forward to
* side effects -
* caveats - this function should only be called on a local user.
*/
int
can_join(struct Client *source_p, struct Channel *chptr, const char *key, const char **forward)
{
rb_dlink_node *invite = NULL;
rb_dlink_node *ptr;
struct Ban *invex = NULL;
struct matchset ms;
int i = 0;
hook_data_channel moduledata;
s_assert(source_p->localClient != NULL);
moduledata.client = source_p;
moduledata.chptr = chptr;
moduledata.approved = 0;
matchset_for_client(source_p, &ms);
if((is_banned(chptr, source_p, NULL, &ms, forward)) == CHFL_BAN)
{
moduledata.approved = ERR_BANNEDFROMCHAN;
goto finish_join_check;
}
if(*chptr->mode.key && (EmptyString(key) || irccmp(chptr->mode.key, key)))
{
moduledata.approved = ERR_BADCHANNELKEY;
goto finish_join_check;
}
/* All checks from this point on will forward... */
if(forward)
*forward = chptr->mode.forward;
if(chptr->mode.mode & MODE_INVITEONLY)
{
RB_DLINK_FOREACH(invite, source_p->user->invited.head)
{
if(invite->data == chptr)
break;
}
if(invite == NULL)
{
if(!ConfigChannel.use_invex)
moduledata.approved = ERR_INVITEONLYCHAN;
RB_DLINK_FOREACH(ptr, chptr->invexlist.head)
{
invex = ptr->data;
if (matches_mask(&ms, invex->banstr) ||
match_extban(invex->banstr, source_p, chptr, CHFL_INVEX))
break;
}
if(ptr == NULL)
moduledata.approved = ERR_INVITEONLYCHAN;
}
}
if(chptr->mode.limit &&
rb_dlink_list_length(&chptr->members) >= (unsigned long) chptr->mode.limit)
i = ERR_CHANNELISFULL;
if(chptr->mode.mode & MODE_REGONLY && EmptyString(source_p->user->suser))
i = ERR_NEEDREGGEDNICK;
/* join throttling stuff --nenolod */
else if(chptr->mode.join_num > 0 && chptr->mode.join_time > 0)
{
if ((rb_current_time() - chptr->join_delta <=
chptr->mode.join_time) && (chptr->join_count >=
chptr->mode.join_num))
i = ERR_THROTTLE;
}
/* allow /invite to override +l/+r/+j also -- jilles */
if (i != 0 && invite == NULL)
{
RB_DLINK_FOREACH(invite, source_p->user->invited.head)
{
if(invite->data == chptr)
break;
}
if (invite == NULL)
moduledata.approved = i;
}
finish_join_check:
call_hook(h_can_join, &moduledata);
return moduledata.approved;
}
/* can_send()
*
* input - user to check in channel, membership pointer
* output - whether can explicitly send or not, else CAN_SEND_NONOP
* side effects -
*/
int
can_send(struct Channel *chptr, struct Client *source_p, struct membership *msptr)
{
hook_data_channel_approval moduledata;
moduledata.approved = CAN_SEND_NONOP;
moduledata.dir = MODE_QUERY;
if(IsServer(source_p) || IsService(source_p))
return CAN_SEND_OPV;
if(MyClient(source_p) && hash_find_resv(chptr->chname) &&
!IsOper(source_p) && !IsExemptResv(source_p))
moduledata.approved = CAN_SEND_NO;
if(msptr == NULL)
{
msptr = find_channel_membership(chptr, source_p);
if(msptr == NULL)
{
/* if its +m or +n and theyre not in the channel,
* they cant send. we dont check bans here because
* theres no possibility of caching them --fl
*/
if(chptr->mode.mode & MODE_NOPRIVMSGS || chptr->mode.mode & MODE_MODERATED)
moduledata.approved = CAN_SEND_NO;
else
moduledata.approved = CAN_SEND_NONOP;
return moduledata.approved;
}
}
if(chptr->mode.mode & MODE_MODERATED)
moduledata.approved = CAN_SEND_NO;
if(MyClient(source_p))
{
/* cached can_send */
if(msptr->bants == chptr->bants)
{
if(can_send_banned(msptr))
moduledata.approved = CAN_SEND_NO;
}
else if(is_banned(chptr, source_p, msptr, NULL, NULL) == CHFL_BAN
|| is_quieted(chptr, source_p, msptr, NULL) == CHFL_BAN)
moduledata.approved = CAN_SEND_NO;
}
if(is_chanop_voiced(msptr))
moduledata.approved = CAN_SEND_OPV;
moduledata.client = source_p;
moduledata.chptr = msptr->chptr;
moduledata.msptr = msptr;
moduledata.target = NULL;
moduledata.dir = (moduledata.approved == CAN_SEND_NO) ? MODE_ADD : MODE_QUERY;
call_hook(h_can_send, &moduledata);
return moduledata.approved;
}
/*
* flood_attack_channel
* inputs - flag 0 if PRIVMSG 1 if NOTICE. RFC
* says NOTICE must not auto reply
* - pointer to source Client
* - pointer to target channel
* output - true if target is under flood attack
* side effects - check for flood attack on target chptr
*/
bool
flood_attack_channel(enum message_type msgtype, struct Client *source_p, struct Channel *chptr, char *chname)
{
int delta;
if(GlobalSetOptions.floodcount && MyClient(source_p))
{
if((chptr->first_received_message_time + 1) < rb_current_time())
{
delta = rb_current_time() - chptr->first_received_message_time;
chptr->received_number_of_privmsgs -= delta;
chptr->first_received_message_time = rb_current_time();
if(chptr->received_number_of_privmsgs <= 0)
{
chptr->received_number_of_privmsgs = 0;
chptr->flood_noticed = 0;
}
}
if((chptr->received_number_of_privmsgs >= GlobalSetOptions.floodcount)
|| chptr->flood_noticed)
{
if(chptr->flood_noticed == 0)
{
sendto_realops_snomask(SNO_BOTS, *chptr->chname == '&' ? L_ALL : L_NETWIDE,
"Possible Flooder %s[%s@%s] on %s target: %s",
source_p->name, source_p->username,
source_p->orighost,
source_p->servptr->name, chptr->chname);
chptr->flood_noticed = 1;
/* Add a bit of penalty */
chptr->received_number_of_privmsgs += 2;
}
if(MyClient(source_p) && (msgtype != MESSAGE_TYPE_NOTICE))
sendto_one(source_p,
":%s NOTICE %s :*** Message to %s throttled due to flooding",
me.name, source_p->name, chptr->chname);
return true;
}
else
chptr->received_number_of_privmsgs++;
}
return false;
}
/* find_bannickchange_channel()
* Input: client to check
* Output: channel preventing nick change
*/
struct Channel *
find_bannickchange_channel(struct Client *client_p)
{
struct Channel *chptr;
struct membership *msptr;
rb_dlink_node *ptr;
struct matchset ms;
if (!MyClient(client_p))
return NULL;
matchset_for_client(client_p, &ms);
RB_DLINK_FOREACH(ptr, client_p->user->channel.head)
{
msptr = ptr->data;
chptr = msptr->chptr;
if (is_chanop_voiced(msptr))
continue;
/* cached can_send */
if (msptr->bants == chptr->bants)
{
if (can_send_banned(msptr))
return chptr;
}
else if (is_banned(chptr, client_p, msptr, &ms, NULL) == CHFL_BAN
|| is_quieted(chptr, client_p, msptr, &ms) == CHFL_BAN)
return chptr;
}
return NULL;
}
/* void check_spambot_warning(struct Client *source_p)
* Input: Client to check, channel name or NULL if this is a part.
* Output: none
* Side-effects: Updates the client's oper_warn_count_down, warns the
* IRC operators if necessary, and updates join_leave_countdown as
* needed.
*/
void
check_spambot_warning(struct Client *source_p, const char *name)
{
int t_delta;
int decrement_count;
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 &&
name != NULL)
{
/* Its already known as a possible spambot */
sendto_realops_snomask(SNO_BOTS, L_NETWIDE,
"User %s (%s@%s) trying to join %s is a possible spambot",
source_p->name,
source_p->username, source_p->orighost, name);
source_p->localClient->oper_warn_count_down = OPER_SPAM_COUNTDOWN;
}
}
else
{
if((t_delta =
(rb_current_time() - source_p->localClient->last_leave_time)) >
JOIN_LEAVE_COUNT_EXPIRE_TIME)
{
decrement_count = (t_delta / JOIN_LEAVE_COUNT_EXPIRE_TIME);
if(name != NULL)
;
else 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((rb_current_time() -
(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 = rb_current_time();