elemental-ircd/src/tgchange.c

178 lines
4.7 KiB
C

/*
* charybdis: an advanced Internet Relay Chat Daemon(ircd).
* tgchange.c - code for restricting private messages
*
* Copyright (C) 2004-2005 Lee Hardy <lee@leeh.co.uk>
* Copyright (C) 2005-2010 Jilles Tjoelker <jilles@stack.nl>
* Copyright (C) 2004-2005 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 "tgchange.h"
#include "channel.h"
#include "client.h"
#include "s_stats.h"
#include "hash.h"
#include "s_newconf.h"
static int add_hashed_target(struct Client *source_p, uint32_t hashv);
struct Channel *
find_allowing_channel(struct Client *source_p, struct Client *target_p)
{
rb_dlink_node *ptr;
struct membership *msptr;
RB_DLINK_FOREACH(ptr, source_p->user->channel.head)
{
msptr = ptr->data;
if (is_chanop_voiced(msptr) && IsMember(target_p, msptr->chptr))
return msptr->chptr;
}
return NULL;
}
int
add_target(struct Client *source_p, struct Client *target_p)
{
uint32_t hashv;
/* can msg themselves or services without using any target slots */
if(source_p == target_p || IsService(target_p))
return 1;
/* special condition for those who have had PRIVMSG crippled to allow them
* to talk to IRCops still.
*
* XXX: is this controversial?
*/
if(source_p->localClient->target_last > rb_current_time() && IsOper(target_p))
return 1;
hashv = fnv_hash_upper((const unsigned char *)use_id(target_p), 32);
return add_hashed_target(source_p, hashv);
}
int
add_channel_target(struct Client *source_p, struct Channel *chptr)
{
uint32_t hashv;
hashv = fnv_hash_upper((const unsigned char *)chptr->chname, 32);
return add_hashed_target(source_p, hashv);
}
static int
add_hashed_target(struct Client *source_p, uint32_t hashv)
{
int i, j;
uint32_t *targets;
targets = source_p->localClient->targets;
/* check for existing target, and move it to the head */
for(i = 0; i < TGCHANGE_NUM + TGCHANGE_REPLY; i++)
{
if(targets[i] == hashv)
{
for(j = i; j > 0; j--)
targets[j] = targets[j - 1];
targets[0] = hashv;
return 1;
}
}
if(source_p->localClient->targets_free < TGCHANGE_NUM)
{
/* first message after connect, we may only start clearing
* slots after this message --anfl
*/
if(!IsTGChange(source_p))
{
SetTGChange(source_p);
source_p->localClient->target_last = rb_current_time();
}
/* clear as many targets as we can */
else if((i = (rb_current_time() - source_p->localClient->target_last) / 60))
{
if(i + source_p->localClient->targets_free > TGCHANGE_NUM)
source_p->localClient->targets_free = TGCHANGE_NUM;
else
source_p->localClient->targets_free += i;
source_p->localClient->target_last = rb_current_time();
}
/* cant clear any, full target list */
else if(source_p->localClient->targets_free == 0)
{
ServerStats.is_tgch++;
add_tgchange(source_p->sockhost);
return 0;
}
}
/* no targets in use, reset their target_last so that they cant
* abuse a long idle to get targets back more quickly
*/
else
{
source_p->localClient->target_last = rb_current_time();
SetTGChange(source_p);
}
for(i = TGCHANGE_NUM + TGCHANGE_REPLY - 1; i > 0; i--)
targets[i] = targets[i - 1];
targets[0] = hashv;
source_p->localClient->targets_free--;
return 1;
}
void
add_reply_target(struct Client *source_p, struct Client *target_p)
{
int i, j;
uint32_t hashv;
uint32_t *targets;
/* can msg themselves or services without using any target slots */
if(source_p == target_p || IsService(target_p))
return;
hashv = fnv_hash_upper((const unsigned char *)use_id(target_p), 32);
targets = source_p->localClient->targets;
/* check for existing target, and move it to the first reply slot
* if it is in a reply slot
*/
for(i = 0; i < TGCHANGE_NUM + TGCHANGE_REPLY; i++)
{
if(targets[i] == hashv)
{
if(i > TGCHANGE_NUM)
{
for(j = i; j > TGCHANGE_NUM; j--)
targets[j] = targets[j - 1];
targets[TGCHANGE_NUM] = hashv;
}
return;
}
}
for(i = TGCHANGE_NUM + TGCHANGE_REPLY - 1; i > TGCHANGE_NUM; i--)
targets[i] = targets[i - 1];
targets[TGCHANGE_NUM] = hashv;
}