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/*
* (C) 2006-2011 by Pablo Neira Ayuso <pablo@netfilter.org>
* (C) 2011 by Vyatta Inc. <http://www.vyatta.com>
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "netlink.h"
#include "traffic_stats.h"
#include "cache.h"
#include "log.h"
#include "conntrackd.h"
#include "internal.h"
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <libnetfilter_conntrack/libnetfilter_conntrack.h>
static int init_stats(void)
{
state.stats = malloc(sizeof(struct ct_stats_state));
if (!state.stats) {
dlog(LOG_ERR, "can't allocate memory for stats");
return -1;
}
memset(state.stats, 0, sizeof(struct ct_stats_state));
STATE_STATS(cache) = cache_create("stats", CACHE_T_CT,
NO_FEATURES, NULL,
&cache_stats_ct_ops);
if (!STATE_STATS(cache)) {
dlog(LOG_ERR, "can't allocate memory for the "
"external cache");
free(state.stats);
return -1;
}
return 0;
}
static void kill_stats(void)
{
cache_destroy(STATE_STATS(cache));
}
/* handler for requests coming via UNIX socket */
static int local_handler_stats(int fd, int type, void *data)
{
int ret = LOCAL_RET_OK;
switch(type) {
case CT_DUMP_INTERNAL:
cache_dump(STATE_STATS(cache), fd, NFCT_O_PLAIN);
break;
case CT_DUMP_INT_XML:
cache_dump(STATE_STATS(cache), fd, NFCT_O_XML);
break;
case CT_FLUSH_CACHE:
case CT_FLUSH_INT_CACHE:
dlog(LOG_NOTICE, "flushing caches");
cache_flush(STATE_STATS(cache));
break;
case KILL:
killer(0);
break;
case STATS:
cache_stats(STATE_STATS(cache), fd);
dump_traffic_stats(fd);
break;
case STATS_CACHE:
cache_stats_extended(STATE_STATS(cache), fd);
break;
default:
ret = 0;
break;
}
return ret;
}
static void stats_populate(struct nf_conntrack *ct)
{
nfct_attr_unset(ct, ATTR_ORIG_COUNTER_BYTES);
nfct_attr_unset(ct, ATTR_ORIG_COUNTER_PACKETS);
nfct_attr_unset(ct, ATTR_REPL_COUNTER_BYTES);
nfct_attr_unset(ct, ATTR_REPL_COUNTER_PACKETS);
nfct_attr_unset(ct, ATTR_TIMEOUT);
nfct_attr_unset(ct, ATTR_USE);
cache_update_force(STATE_STATS(cache), ct);
}
static int stats_resync(enum nf_conntrack_msg_type type,
struct nf_conntrack *ct,
void *data)
{
if (ct_filter_conntrack(ct, 1))
return NFCT_CB_CONTINUE;
/* This is required by kernels < 2.6.20 */
nfct_attr_unset(ct, ATTR_TIMEOUT);
nfct_attr_unset(ct, ATTR_ORIG_COUNTER_BYTES);
nfct_attr_unset(ct, ATTR_ORIG_COUNTER_PACKETS);
nfct_attr_unset(ct, ATTR_REPL_COUNTER_BYTES);
nfct_attr_unset(ct, ATTR_REPL_COUNTER_PACKETS);
nfct_attr_unset(ct, ATTR_USE);
cache_update_force(STATE_STATS(cache), ct);
return NFCT_CB_CONTINUE;
}
static int purge_step(void *data1, void *data2)
{
struct cache_object *obj = data2;
STATE(get_retval) = 0;
nl_get_conntrack(STATE(get), obj->ptr); /* modifies STATE(get_retval) */
if (!STATE(get_retval)) {
cache_del(STATE_STATS(cache), obj);
dlog_ct(STATE(stats_log), obj->ptr, NFCT_O_PLAIN);
cache_object_free(obj);
}
return 0;
}
static void stats_purge(void)
{
cache_iterate(STATE_STATS(cache), NULL, purge_step);
}
static void stats_event_new(struct nf_conntrack *ct, int origin)
{
int id;
struct cache_object *obj;
nfct_attr_unset(ct, ATTR_TIMEOUT);
obj = cache_find(STATE_STATS(cache), ct, &id);
if (obj == NULL) {
obj = cache_object_new(STATE_STATS(cache), ct);
if (obj == NULL)
return;
if (cache_add(STATE_STATS(cache), obj, id) == -1) {
cache_object_free(obj);
return;
}
}
return;
}
static void stats_event_upd(struct nf_conntrack *ct, int origin)
{
nfct_attr_unset(ct, ATTR_TIMEOUT);
cache_update_force(STATE_STATS(cache), ct);
}
static int stats_event_del(struct nf_conntrack *ct, int origin)
{
int id;
struct cache_object *obj;
nfct_attr_unset(ct, ATTR_TIMEOUT);
obj = cache_find(STATE_STATS(cache), ct, &id);
if (obj) {
cache_del(STATE_STATS(cache), obj);
dlog_ct(STATE(stats_log), ct, NFCT_O_PLAIN);
cache_object_free(obj);
return 1;
}
return 0;
}
static struct internal_handler internal_cache_stats = {
.flags = INTERNAL_F_POPULATE | INTERNAL_F_RESYNC,
.ct = {
.populate = stats_populate,
.resync = stats_resync,
.purge = stats_purge,
.new = stats_event_new,
.upd = stats_event_upd,
.del = stats_event_del,
},
};
struct ct_mode stats_mode = {
.init = init_stats,
.local = local_handler_stats,
.kill = kill_stats,
.internal = &internal_cache_stats,
};
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