mirror of
https://github.com/matrix-construct/construct
synced 2024-08-31 05:45:16 +02:00
199 lines
5.2 KiB
C
199 lines
5.2 KiB
C
/*
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* charybdis: an advanced Internet Relay Chat Daemon(ircd).
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* tgchange.c - code for restricting private messages
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*
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* Copyright (C) 2004-2005 Lee Hardy <lee@leeh.co.uk>
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* Copyright (C) 2005-2010 Jilles Tjoelker <jilles@stack.nl>
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* Copyright (C) 2004-2005 ircd-ratbox development team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*/
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#include "stdinc.h"
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#include "tgchange.h"
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#include "channel.h"
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#include "client.h"
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#include "s_stats.h"
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#include "hash.h"
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#include "s_conf.h"
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#include "s_newconf.h"
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#include "s_serv.h"
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#include "send.h"
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static int add_hashed_target(struct Client *source_p, uint32_t hashv);
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struct Channel *
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find_allowing_channel(struct Client *source_p, struct Client *target_p)
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{
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rb_dlink_node *ptr;
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struct membership *msptr;
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RB_DLINK_FOREACH(ptr, source_p->user->channel.head)
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{
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msptr = ptr->data;
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if (is_chanop_voiced(msptr) && IsMember(target_p, msptr->chptr))
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return msptr->chptr;
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}
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return NULL;
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}
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int
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add_target(struct Client *source_p, struct Client *target_p)
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{
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uint32_t hashv;
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/* can msg themselves or services without using any target slots */
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if(source_p == target_p || IsService(target_p))
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return 1;
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/* special condition for those who have had PRIVMSG crippled to allow them
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* to talk to IRCops still.
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*
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* XXX: is this controversial?
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*/
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if(source_p->localClient->target_last > rb_current_time() && IsOper(target_p))
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return 1;
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hashv = fnv_hash_upper((const unsigned char *)use_id(target_p), 32);
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return add_hashed_target(source_p, hashv);
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}
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int
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add_channel_target(struct Client *source_p, struct Channel *chptr)
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{
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uint32_t hashv;
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if(!ConfigChannel.channel_target_change)
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return 1;
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hashv = fnv_hash_upper((const unsigned char *)chptr->chname, 32);
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return add_hashed_target(source_p, hashv);
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}
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static int
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add_hashed_target(struct Client *source_p, uint32_t hashv)
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{
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int i, j;
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uint32_t *targets;
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targets = source_p->localClient->targets;
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/* check for existing target, and move it to the head */
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for(i = 0; i < TGCHANGE_NUM + TGCHANGE_REPLY; i++)
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{
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if(targets[i] == hashv)
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{
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for(j = i; j > 0; j--)
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targets[j] = targets[j - 1];
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targets[0] = hashv;
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return 1;
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}
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}
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if(source_p->localClient->targets_free < TGCHANGE_NUM)
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{
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/* first message after connect, we may only start clearing
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* slots after this message --anfl
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*/
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if(!IsTGChange(source_p))
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{
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SetTGChange(source_p);
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source_p->localClient->target_last = rb_current_time();
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}
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/* clear as many targets as we can */
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else if((i = (rb_current_time() - source_p->localClient->target_last) / 60))
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{
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if(i + source_p->localClient->targets_free > TGCHANGE_NUM)
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source_p->localClient->targets_free = TGCHANGE_NUM;
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else
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source_p->localClient->targets_free += i;
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source_p->localClient->target_last = rb_current_time();
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}
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/* cant clear any, full target list */
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else if(source_p->localClient->targets_free == 0)
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{
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ServerStats.is_tgch++;
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add_tgchange(source_p->sockhost);
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if (!IsTGExcessive(source_p))
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{
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SetTGExcessive(source_p);
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/* This is sent to L_ALL because it's regenerated on all servers
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* that have the TGINFO module loaded.
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*/
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sendto_realops_snomask(SNO_BOTS, L_ALL,
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"Excessive target change from %s (%s@%s)",
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source_p->name, source_p->username,
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source_p->orighost);
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}
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sendto_match_servs(source_p, "*", CAP_ENCAP, NOCAPS,
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"ENCAP * TGINFO 0");
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return 0;
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}
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}
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/* no targets in use, reset their target_last so that they cant
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* abuse a long idle to get targets back more quickly
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*/
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else
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{
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source_p->localClient->target_last = rb_current_time();
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SetTGChange(source_p);
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}
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for(i = TGCHANGE_NUM + TGCHANGE_REPLY - 1; i > 0; i--)
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targets[i] = targets[i - 1];
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targets[0] = hashv;
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source_p->localClient->targets_free--;
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return 1;
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}
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void
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add_reply_target(struct Client *source_p, struct Client *target_p)
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{
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int i, j;
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uint32_t hashv;
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uint32_t *targets;
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/* can msg themselves or services without using any target slots */
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if(source_p == target_p || IsService(target_p))
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return;
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hashv = fnv_hash_upper((const unsigned char *)use_id(target_p), 32);
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targets = source_p->localClient->targets;
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/* check for existing target, and move it to the first reply slot
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* if it is in a reply slot
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*/
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for(i = 0; i < TGCHANGE_NUM + TGCHANGE_REPLY; i++)
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{
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if(targets[i] == hashv)
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{
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if(i > TGCHANGE_NUM)
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{
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for(j = i; j > TGCHANGE_NUM; j--)
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targets[j] = targets[j - 1];
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targets[TGCHANGE_NUM] = hashv;
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}
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return;
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}
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}
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for(i = TGCHANGE_NUM + TGCHANGE_REPLY - 1; i > TGCHANGE_NUM; i--)
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targets[i] = targets[i - 1];
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targets[TGCHANGE_NUM] = hashv;
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}
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