305 lines
7.3 KiB
C
305 lines
7.3 KiB
C
/*
|
|
* ircd-ratbox: A slightly useful ircd
|
|
* reject.c: reject users with prejudice
|
|
*
|
|
* Copyright (C) 2003 Aaron Sethman <androsyn@ratbox.org>
|
|
* Copyright (C) 2003-2005 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
|
|
*
|
|
* $Id: reject.c 3456 2007-05-18 19:14:18Z jilles $
|
|
*/
|
|
|
|
#include "stdinc.h"
|
|
#include "config.h"
|
|
#include "patricia.h"
|
|
#include "client.h"
|
|
#include "s_conf.h"
|
|
#include "event.h"
|
|
#include "tools.h"
|
|
#include "reject.h"
|
|
#include "s_stats.h"
|
|
#include "msg.h"
|
|
#include "hash.h"
|
|
|
|
static patricia_tree_t *reject_tree;
|
|
dlink_list delay_exit;
|
|
static dlink_list reject_list;
|
|
|
|
static patricia_tree_t *unknown_tree;
|
|
|
|
struct reject_data
|
|
{
|
|
dlink_node rnode;
|
|
time_t time;
|
|
unsigned int count;
|
|
uint32_t mask_hashv;
|
|
};
|
|
|
|
static patricia_tree_t *unknown_tree;
|
|
|
|
static void
|
|
reject_exit(void *unused)
|
|
{
|
|
struct Client *client_p;
|
|
dlink_node *ptr, *ptr_next;
|
|
|
|
DLINK_FOREACH_SAFE(ptr, ptr_next, delay_exit.head)
|
|
{
|
|
client_p = ptr->data;
|
|
if(IsDead(client_p))
|
|
continue;
|
|
|
|
/* this MUST be here, to prevent the possibility
|
|
* sendto_one() generates a write error, and then a client
|
|
* ends up on the dead_list and the abort_list --fl
|
|
*
|
|
* new disconnect notice stolen from ircu --nenolod
|
|
* no, this only happens when someone's IP has some
|
|
* ban on it and rejects them rather longer than the
|
|
* ircu message suggests --jilles
|
|
*/
|
|
if(!IsIOError(client_p))
|
|
{
|
|
if(IsExUnknown(client_p))
|
|
sendto_one(client_p, "ERROR :Closing Link: %s (*** Too many unknown connections)", client_p->host);
|
|
else
|
|
sendto_one(client_p, "ERROR :Closing Link: %s (*** Banned (cache))", client_p->host);
|
|
}
|
|
close_connection(client_p);
|
|
SetDead(client_p);
|
|
dlinkAddAlloc(client_p, &dead_list);
|
|
}
|
|
|
|
delay_exit.head = delay_exit.tail = NULL;
|
|
delay_exit.length = 0;
|
|
}
|
|
|
|
static void
|
|
reject_expires(void *unused)
|
|
{
|
|
dlink_node *ptr, *next;
|
|
patricia_node_t *pnode;
|
|
struct reject_data *rdata;
|
|
|
|
DLINK_FOREACH_SAFE(ptr, next, reject_list.head)
|
|
{
|
|
pnode = ptr->data;
|
|
rdata = pnode->data;
|
|
|
|
if(rdata->time + ConfigFileEntry.reject_duration > CurrentTime)
|
|
continue;
|
|
|
|
dlinkDelete(ptr, &reject_list);
|
|
MyFree(rdata);
|
|
patricia_remove(reject_tree, pnode);
|
|
}
|
|
}
|
|
|
|
void
|
|
init_reject(void)
|
|
{
|
|
reject_tree = New_Patricia(PATRICIA_BITS);
|
|
unknown_tree = New_Patricia(PATRICIA_BITS);
|
|
eventAdd("reject_exit", reject_exit, NULL, DELAYED_EXIT_TIME);
|
|
eventAdd("reject_expires", reject_expires, NULL, 60);
|
|
}
|
|
|
|
|
|
void
|
|
add_reject(struct Client *client_p, const char *mask1, const char *mask2)
|
|
{
|
|
patricia_node_t *pnode;
|
|
struct reject_data *rdata;
|
|
uint32_t hashv;
|
|
|
|
/* Reject is disabled */
|
|
if(ConfigFileEntry.reject_after_count == 0 || ConfigFileEntry.reject_ban_time == 0)
|
|
return;
|
|
|
|
hashv = 0;
|
|
if (mask1 != NULL)
|
|
hashv ^= fnv_hash_upper(mask1, 32);
|
|
if (mask2 != NULL)
|
|
hashv ^= fnv_hash_upper(mask2, 32);
|
|
|
|
if((pnode = match_ip(reject_tree, (struct sockaddr *)&client_p->localClient->ip)) != NULL)
|
|
{
|
|
rdata = pnode->data;
|
|
rdata->time = CurrentTime;
|
|
rdata->count++;
|
|
}
|
|
else
|
|
{
|
|
int bitlen = 32;
|
|
#ifdef IPV6
|
|
if(client_p->localClient->ip.ss_family == AF_INET6)
|
|
bitlen = 128;
|
|
#endif
|
|
pnode = make_and_lookup_ip(reject_tree, (struct sockaddr *)&client_p->localClient->ip, bitlen);
|
|
pnode->data = rdata = MyMalloc(sizeof(struct reject_data));
|
|
dlinkAddTail(pnode, &rdata->rnode, &reject_list);
|
|
rdata->time = CurrentTime;
|
|
rdata->count = 1;
|
|
}
|
|
rdata->mask_hashv = hashv;
|
|
}
|
|
|
|
int
|
|
check_reject(struct Client *client_p)
|
|
{
|
|
patricia_node_t *pnode;
|
|
struct reject_data *rdata;
|
|
|
|
/* Reject is disabled */
|
|
if(ConfigFileEntry.reject_after_count == 0 || ConfigFileEntry.reject_ban_time == 0 ||
|
|
ConfigFileEntry.reject_duration == 0)
|
|
return 0;
|
|
|
|
pnode = match_ip(reject_tree, (struct sockaddr *)&client_p->localClient->ip);
|
|
if(pnode != NULL)
|
|
{
|
|
rdata = pnode->data;
|
|
|
|
rdata->time = CurrentTime;
|
|
if(rdata->count > ConfigFileEntry.reject_after_count)
|
|
{
|
|
ServerStats->is_rej++;
|
|
SetReject(client_p);
|
|
comm_setselect(client_p->localClient->F->fd, FDLIST_NONE, COMM_SELECT_WRITE | COMM_SELECT_READ, NULL, NULL, 0);
|
|
SetClosing(client_p);
|
|
dlinkMoveNode(&client_p->localClient->tnode, &unknown_list, &delay_exit);
|
|
return 1;
|
|
}
|
|
}
|
|
/* Caller does what it wants */
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
flush_reject(void)
|
|
{
|
|
dlink_node *ptr, *next;
|
|
patricia_node_t *pnode;
|
|
struct reject_data *rdata;
|
|
|
|
DLINK_FOREACH_SAFE(ptr, next, reject_list.head)
|
|
{
|
|
pnode = ptr->data;
|
|
rdata = pnode->data;
|
|
dlinkDelete(ptr, &reject_list);
|
|
MyFree(rdata);
|
|
patricia_remove(reject_tree, pnode);
|
|
}
|
|
}
|
|
|
|
int
|
|
remove_reject_ip(const char *ip)
|
|
{
|
|
patricia_node_t *pnode;
|
|
|
|
/* Reject is disabled */
|
|
if(ConfigFileEntry.reject_after_count == 0 || ConfigFileEntry.reject_ban_time == 0 ||
|
|
ConfigFileEntry.reject_duration == 0)
|
|
return -1;
|
|
|
|
if((pnode = match_string(reject_tree, ip)) != NULL)
|
|
{
|
|
struct reject_data *rdata = pnode->data;
|
|
dlinkDelete(&rdata->rnode, &reject_list);
|
|
MyFree(rdata);
|
|
patricia_remove(reject_tree, pnode);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
remove_reject_mask(const char *mask1, const char *mask2)
|
|
{
|
|
dlink_node *ptr, *next;
|
|
patricia_node_t *pnode;
|
|
struct reject_data *rdata;
|
|
uint32_t hashv;
|
|
int n = 0;
|
|
|
|
hashv = 0;
|
|
if (mask1 != NULL)
|
|
hashv ^= fnv_hash_upper(mask1, 32);
|
|
if (mask2 != NULL)
|
|
hashv ^= fnv_hash_upper(mask2, 32);
|
|
DLINK_FOREACH_SAFE(ptr, next, reject_list.head)
|
|
{
|
|
pnode = ptr->data;
|
|
rdata = pnode->data;
|
|
if (rdata->mask_hashv == hashv)
|
|
{
|
|
dlinkDelete(ptr, &reject_list);
|
|
MyFree(rdata);
|
|
patricia_remove(reject_tree, pnode);
|
|
n++;
|
|
}
|
|
}
|
|
return n;
|
|
}
|
|
|
|
|
|
int
|
|
add_unknown_ip(struct Client *client_p)
|
|
{
|
|
patricia_node_t *pnode;
|
|
|
|
if((pnode = match_ip(unknown_tree, (struct sockaddr *)&client_p->localClient->ip)) == NULL)
|
|
{
|
|
int bitlen = 32;
|
|
#ifdef IPV6
|
|
if(client_p->localClient->ip.ss_family == AF_INET6)
|
|
bitlen = 128;
|
|
#endif
|
|
pnode = make_and_lookup_ip(unknown_tree, (struct sockaddr *)&client_p->localClient->ip, bitlen);
|
|
pnode->data = (void *)0;
|
|
}
|
|
|
|
if((unsigned long)pnode->data >= ConfigFileEntry.max_unknown_ip)
|
|
{
|
|
SetExUnknown(client_p);
|
|
SetReject(client_p);
|
|
comm_setselect(client_p->localClient->F->fd, FDLIST_NONE, COMM_SELECT_WRITE | COMM_SELECT_READ, NULL, NULL, 0);
|
|
SetClosing(client_p);
|
|
dlinkMoveNode(&client_p->localClient->tnode, &unknown_list, &delay_exit);
|
|
return 1;
|
|
}
|
|
|
|
pnode->data = (void *)((unsigned long)pnode->data + 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
del_unknown_ip(struct Client *client_p)
|
|
{
|
|
patricia_node_t *pnode;
|
|
|
|
if((pnode = match_ip(unknown_tree, (struct sockaddr *)&client_p->localClient->ip)) != NULL)
|
|
{
|
|
pnode->data = (void *)((unsigned long)pnode->data - 1);
|
|
if((unsigned long)pnode->data <= 0)
|
|
{
|
|
patricia_remove(unknown_tree, pnode);
|
|
}
|
|
}
|
|
/* this can happen due to m_webirc.c's manipulations, for example */
|
|
}
|