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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 "conntrackd.h"
#include "sync.h"
#include "log.h"
#include "cache.h"
#include "external.h"
#include <libnetfilter_conntrack/libnetfilter_conntrack.h>
#include <stdlib.h>
static struct cache *external;
static int external_cache_init(void)
{
external = cache_create("external", CACHE_T_CT,
STATE_SYNC(sync)->external_cache_flags,
NULL, &cache_sync_external_ct_ops);
if (external == NULL) {
dlog(LOG_ERR, "can't allocate memory for the external cache");
return -1;
}
return 0;
}
static void external_cache_close(void)
{
cache_destroy(external);
}
static void external_cache_ct_new(struct nf_conntrack *ct)
{
struct cache_object *obj;
int id;
obj = cache_find(external, ct, &id);
if (obj == NULL) {
retry:
obj = cache_object_new(external, ct);
if (obj == NULL)
return;
if (cache_add(external, obj, id) == -1) {
cache_object_free(obj);
return;
}
} else {
cache_del(external, obj);
cache_object_free(obj);
goto retry;
}
}
static void external_cache_ct_upd(struct nf_conntrack *ct)
{
cache_update_force(external, ct);
}
static void external_cache_ct_del(struct nf_conntrack *ct)
{
struct cache_object *obj;
int id;
obj = cache_find(external, ct, &id);
if (obj) {
cache_del(external, obj);
cache_object_free(obj);
}
}
static void external_cache_ct_dump(int fd, int type)
{
cache_dump(external, fd, type);
}
static int external_cache_ct_commit(struct nfct_handle *h, int fd)
{
if (!cache_commit(external, h, fd)) {
dlog(LOG_NOTICE, "commit already in progress, skipping");
return LOCAL_RET_OK;
}
/* Keep the client socket open, we want synchronous commits. */
return LOCAL_RET_STOLEN;
}
static void external_cache_ct_flush(void)
{
cache_flush(external);
}
static void external_cache_ct_stats(int fd)
{
cache_stats(external, fd);
}
static void external_cache_ct_stats_ext(int fd)
{
cache_stats_extended(external, fd);
}
struct external_handler external_cache = {
.init = external_cache_init,
.close = external_cache_close,
.ct = {
.new = external_cache_ct_new,
.upd = external_cache_ct_upd,
.del = external_cache_ct_del,
.dump = external_cache_ct_dump,
.commit = external_cache_ct_commit,
.flush = external_cache_ct_flush,
.stats = external_cache_ct_stats,
.stats_ext = external_cache_ct_stats_ext,
},
};
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