mirror of
https://github.com/matrix-construct/construct
synced 2024-11-18 07:50:57 +01:00
61b517ca3c
* To benefit from the precompiled-header (PCH) it MUST provide "the first C token." Advantages: Never worry about the include stack again. Remember, this means one less thing for random module developers, community people learning C++, and new developers to deal with. It should reduce the learning curve and barrier for participation. Disadvantages: Makes overall compilation a bit slower, especially without any additional work to improve it again. There are several opportunities, places where the PCH is probably being ignored, etc that can be addressed.
386 lines
8.5 KiB
C++
386 lines
8.5 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
|
|
* USA
|
|
*/
|
|
|
|
namespace ircd {
|
|
|
|
static rb_patricia_tree_t *reject_tree;
|
|
static rb_dlink_list delay_exit;
|
|
static rb_dlink_list reject_list;
|
|
static rb_dlink_list throttle_list;
|
|
static rb_patricia_tree_t *throttle_tree;
|
|
static void throttle_expires(void *unused);
|
|
|
|
|
|
typedef struct _reject_data
|
|
{
|
|
rb_dlink_node rnode;
|
|
time_t time;
|
|
unsigned int count;
|
|
uint32_t mask_hashv;
|
|
} reject_t;
|
|
|
|
typedef struct _delay_data
|
|
{
|
|
rb_dlink_node node;
|
|
rb_fde_t *F;
|
|
} delay_t;
|
|
|
|
typedef struct _throttle
|
|
{
|
|
rb_dlink_node node;
|
|
time_t last;
|
|
int count;
|
|
} throttle_t;
|
|
|
|
unsigned long
|
|
delay_exit_length(void)
|
|
{
|
|
return rb_dlink_list_length(&delay_exit);
|
|
}
|
|
|
|
static void
|
|
reject_exit(void *unused)
|
|
{
|
|
rb_dlink_node *ptr, *ptr_next;
|
|
delay_t *ddata;
|
|
static const char *errbuf = "ERROR :Closing Link: (*** Banned (cache))\r\n";
|
|
|
|
RB_DLINK_FOREACH_SAFE(ptr, ptr_next, delay_exit.head)
|
|
{
|
|
ddata = (delay_t *)ptr->data;
|
|
|
|
rb_write(ddata->F, errbuf, strlen(errbuf));
|
|
rb_close(ddata->F);
|
|
rb_free(ddata);
|
|
}
|
|
|
|
delay_exit.head = delay_exit.tail = NULL;
|
|
delay_exit.length = 0;
|
|
}
|
|
|
|
static void
|
|
reject_expires(void *unused)
|
|
{
|
|
rb_dlink_node *ptr, *next;
|
|
rb_patricia_node_t *pnode;
|
|
reject_t *rdata;
|
|
|
|
RB_DLINK_FOREACH_SAFE(ptr, next, reject_list.head)
|
|
{
|
|
pnode = (rb_patricia_node_t *)ptr->data;
|
|
rdata = (reject_t *)pnode->data;
|
|
|
|
if(rdata->time + ConfigFileEntry.reject_duration > rb_current_time())
|
|
continue;
|
|
|
|
rb_dlinkDelete(ptr, &reject_list);
|
|
rb_free(rdata);
|
|
rb_patricia_remove(reject_tree, pnode);
|
|
}
|
|
}
|
|
|
|
void
|
|
init_reject(void)
|
|
{
|
|
reject_tree = rb_new_patricia(PATRICIA_BITS);
|
|
throttle_tree = rb_new_patricia(PATRICIA_BITS);
|
|
rb_event_add("reject_exit", reject_exit, NULL, DELAYED_EXIT_TIME);
|
|
rb_event_add("reject_expires", reject_expires, NULL, 60);
|
|
rb_event_add("throttle_expires", throttle_expires, NULL, 10);
|
|
}
|
|
|
|
unsigned long
|
|
throttle_size(void)
|
|
{
|
|
unsigned long count;
|
|
rb_dlink_node *ptr;
|
|
rb_patricia_node_t *pnode;
|
|
throttle_t *t;
|
|
|
|
count = 0;
|
|
RB_DLINK_FOREACH(ptr, throttle_list.head)
|
|
{
|
|
pnode = (rb_patricia_node_t *)ptr->data;
|
|
t = (throttle_t *)pnode->data;
|
|
if (t->count > ConfigFileEntry.throttle_count)
|
|
count++;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
void
|
|
add_reject(struct Client *client_p, const char *mask1, const char *mask2)
|
|
{
|
|
rb_patricia_node_t *pnode;
|
|
reject_t *rdata;
|
|
uint32_t hashv;
|
|
|
|
/* Reject is disabled */
|
|
if(ConfigFileEntry.reject_after_count == 0 || ConfigFileEntry.reject_duration == 0)
|
|
return;
|
|
|
|
hashv = 0;
|
|
if (mask1 != NULL)
|
|
hashv ^= fnv_hash_upper((const unsigned char *)mask1, 32);
|
|
if (mask2 != NULL)
|
|
hashv ^= fnv_hash_upper((const unsigned char *)mask2, 32);
|
|
|
|
if((pnode = rb_match_ip(reject_tree, (struct sockaddr *)&client_p->localClient->ip)) != NULL)
|
|
{
|
|
rdata = (reject_t *)pnode->data;
|
|
rdata->time = rb_current_time();
|
|
rdata->count++;
|
|
}
|
|
else
|
|
{
|
|
int bitlen = 32;
|
|
#ifdef RB_IPV6
|
|
if(GET_SS_FAMILY(&client_p->localClient->ip) == AF_INET6)
|
|
bitlen = 128;
|
|
#endif
|
|
pnode = make_and_lookup_ip(reject_tree, (struct sockaddr *)&client_p->localClient->ip, bitlen);
|
|
pnode->data = rdata = (reject_t *)rb_malloc(sizeof(reject_t));
|
|
rb_dlinkAddTail(pnode, &rdata->rnode, &reject_list);
|
|
rdata->time = rb_current_time();
|
|
rdata->count = 1;
|
|
}
|
|
rdata->mask_hashv = hashv;
|
|
}
|
|
|
|
int
|
|
check_reject(rb_fde_t *F, struct sockaddr *addr)
|
|
{
|
|
rb_patricia_node_t *pnode;
|
|
reject_t *rdata;
|
|
delay_t *ddata;
|
|
/* Reject is disabled */
|
|
if(ConfigFileEntry.reject_after_count == 0 || ConfigFileEntry.reject_duration == 0)
|
|
return 0;
|
|
|
|
pnode = rb_match_ip(reject_tree, addr);
|
|
if(pnode != NULL)
|
|
{
|
|
rdata = (reject_t *)pnode->data;
|
|
|
|
rdata->time = rb_current_time();
|
|
if(rdata->count > (unsigned long)ConfigFileEntry.reject_after_count)
|
|
{
|
|
ddata = (delay_t *)rb_malloc(sizeof(delay_t));
|
|
ServerStats.is_rej++;
|
|
rb_setselect(F, RB_SELECT_WRITE | RB_SELECT_READ, NULL, NULL);
|
|
ddata->F = F;
|
|
rb_dlinkAdd(ddata, &ddata->node, &delay_exit);
|
|
return 1;
|
|
}
|
|
}
|
|
/* Caller does what it wants */
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
is_reject_ip(struct sockaddr *addr)
|
|
{
|
|
rb_patricia_node_t *pnode;
|
|
reject_t *rdata;
|
|
int duration;
|
|
|
|
/* Reject is disabled */
|
|
if(ConfigFileEntry.reject_after_count == 0 || ConfigFileEntry.reject_duration == 0)
|
|
return 0;
|
|
|
|
pnode = rb_match_ip(reject_tree, addr);
|
|
if(pnode != NULL)
|
|
{
|
|
rdata = (reject_t *)pnode->data;
|
|
|
|
if(rdata->count > (unsigned long)ConfigFileEntry.reject_after_count)
|
|
{
|
|
duration = rdata->time + ConfigFileEntry.reject_duration - rb_current_time();
|
|
return duration > 0 ? duration : 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
flush_reject(void)
|
|
{
|
|
rb_dlink_node *ptr, *next;
|
|
rb_patricia_node_t *pnode;
|
|
reject_t *rdata;
|
|
|
|
RB_DLINK_FOREACH_SAFE(ptr, next, reject_list.head)
|
|
{
|
|
pnode = (rb_patricia_node_t *)ptr->data;
|
|
rdata = (reject_t *)pnode->data;
|
|
rb_dlinkDelete(ptr, &reject_list);
|
|
rb_free(rdata);
|
|
rb_patricia_remove(reject_tree, pnode);
|
|
}
|
|
}
|
|
|
|
int
|
|
remove_reject_ip(const char *ip)
|
|
{
|
|
rb_patricia_node_t *pnode;
|
|
|
|
/* Reject is disabled */
|
|
if(ConfigFileEntry.reject_after_count == 0 || ConfigFileEntry.reject_duration == 0)
|
|
return -1;
|
|
|
|
if((pnode = rb_match_string(reject_tree, ip)) != NULL)
|
|
{
|
|
reject_t *rdata = (reject_t *)pnode->data;
|
|
rb_dlinkDelete(&rdata->rnode, &reject_list);
|
|
rb_free(rdata);
|
|
rb_patricia_remove(reject_tree, pnode);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
remove_reject_mask(const char *mask1, const char *mask2)
|
|
{
|
|
rb_dlink_node *ptr, *next;
|
|
rb_patricia_node_t *pnode;
|
|
reject_t *rdata;
|
|
uint32_t hashv;
|
|
int n = 0;
|
|
|
|
hashv = 0;
|
|
if (mask1 != NULL)
|
|
hashv ^= fnv_hash_upper((const unsigned char *)mask1, 32);
|
|
if (mask2 != NULL)
|
|
hashv ^= fnv_hash_upper((const unsigned char *)mask2, 32);
|
|
RB_DLINK_FOREACH_SAFE(ptr, next, reject_list.head)
|
|
{
|
|
pnode = (rb_patricia_node_t *)ptr->data;
|
|
rdata = (reject_t *)pnode->data;
|
|
if (rdata->mask_hashv == hashv)
|
|
{
|
|
rb_dlinkDelete(ptr, &reject_list);
|
|
rb_free(rdata);
|
|
rb_patricia_remove(reject_tree, pnode);
|
|
n++;
|
|
}
|
|
}
|
|
return n;
|
|
}
|
|
|
|
int
|
|
throttle_add(struct sockaddr *addr)
|
|
{
|
|
throttle_t *t;
|
|
rb_patricia_node_t *pnode;
|
|
|
|
if((pnode = rb_match_ip(throttle_tree, addr)) != NULL)
|
|
{
|
|
t = (throttle_t *)pnode->data;
|
|
|
|
if(t->count > ConfigFileEntry.throttle_count)
|
|
{
|
|
ServerStats.is_thr++;
|
|
return 1;
|
|
}
|
|
/* Stop penalizing them after they've been throttled */
|
|
t->last = rb_current_time();
|
|
t->count++;
|
|
|
|
} else {
|
|
int bitlen = 32;
|
|
#ifdef RB_IPV6
|
|
if(GET_SS_FAMILY(addr) == AF_INET6)
|
|
bitlen = 128;
|
|
#endif
|
|
t = (throttle_t *)rb_malloc(sizeof(throttle_t));
|
|
t->last = rb_current_time();
|
|
t->count = 1;
|
|
pnode = make_and_lookup_ip(throttle_tree, addr, bitlen);
|
|
pnode->data = t;
|
|
rb_dlinkAdd(pnode, &t->node, &throttle_list);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
is_throttle_ip(struct sockaddr *addr)
|
|
{
|
|
throttle_t *t;
|
|
rb_patricia_node_t *pnode;
|
|
int duration;
|
|
|
|
if((pnode = rb_match_ip(throttle_tree, addr)) != NULL)
|
|
{
|
|
t = (throttle_t *)pnode->data;
|
|
if(t->count > ConfigFileEntry.throttle_count)
|
|
{
|
|
duration = t->last + ConfigFileEntry.throttle_duration - rb_current_time();
|
|
return duration > 0 ? duration : 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
flush_throttle(void)
|
|
{
|
|
rb_dlink_node *ptr, *next;
|
|
rb_patricia_node_t *pnode;
|
|
throttle_t *t;
|
|
|
|
RB_DLINK_FOREACH_SAFE(ptr, next, throttle_list.head)
|
|
{
|
|
pnode = (rb_patricia_node_t *)ptr->data;
|
|
t = (throttle_t *)pnode->data;
|
|
|
|
rb_dlinkDelete(ptr, &throttle_list);
|
|
rb_free(t);
|
|
rb_patricia_remove(throttle_tree, pnode);
|
|
}
|
|
}
|
|
|
|
static void
|
|
throttle_expires(void *unused)
|
|
{
|
|
rb_dlink_node *ptr, *next;
|
|
rb_patricia_node_t *pnode;
|
|
throttle_t *t;
|
|
|
|
RB_DLINK_FOREACH_SAFE(ptr, next, throttle_list.head)
|
|
{
|
|
pnode = (rb_patricia_node_t *)ptr->data;
|
|
t = (throttle_t *)pnode->data;
|
|
|
|
if(t->last + ConfigFileEntry.throttle_duration > rb_current_time())
|
|
continue;
|
|
|
|
rb_dlinkDelete(ptr, &throttle_list);
|
|
rb_free(t);
|
|
rb_patricia_remove(throttle_tree, pnode);
|
|
}
|
|
}
|
|
|
|
|
|
} // namespace ircd
|