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/*
* (C) 2009 by Pablo Neira Ayuso <pablo@netfilter.org>
*
* 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 feature has been sponsored by 6WIND <www.6wind.com>.
*/
#include "conntrackd.h"
#include "sync.h"
#include "log.h"
#include "cache.h"
#include "netlink.h"
#include "network.h"
#include "origin.h"
static int _init(void)
{
return 0;
}
static void _close(void)
{
}
static int dump_cb(enum nf_conntrack_msg_type type,
struct nf_conntrack *ct, void *data)
{
char buf[1024];
int size, *fd = data;
size = nfct_snprintf(buf, 1024, ct, NFCT_T_UNKNOWN, NFCT_O_DEFAULT, 0);
if (size < 1024) {
buf[size] = '\n';
size++;
}
send(*fd, buf, size, 0);
return NFCT_CB_CONTINUE;
}
static void dump(int fd, int type)
{
struct nfct_handle *h;
u_int32_t family = AF_UNSPEC;
int ret;
h = nfct_open(CONNTRACK, 0);
if (h == NULL) {
dlog(LOG_ERR, "can't allocate memory for the internal cache");
return;
}
nfct_callback_register(h, NFCT_T_ALL, dump_cb, &fd);
ret = nfct_query(h, NFCT_Q_DUMP, &family);
if (ret == -1) {
dlog(LOG_ERR, "can't dump kernel table");
}
nfct_close(h);
}
static void flush(void)
{
nl_flush_conntrack_table(STATE(flush));
}
struct {
uint32_t new;
uint32_t upd;
uint32_t del;
} internal_bypass_stats;
static void stats(int fd)
{
char buf[512];
int size;
size = sprintf(buf, "internal bypass:\n"
"connections new:\t\t%12u\n"
"connections updated:\t\t%12u\n"
"connections destroyed:\t\t%12u\n\n",
internal_bypass_stats.new,
internal_bypass_stats.upd,
internal_bypass_stats.del);
send(fd, buf, size, 0);
}
/* unused, INTERNAL_F_POPULATE is unset. No cache, nothing to populate. */
static void populate(struct nf_conntrack *ct)
{
}
/* unused, INTERNAL_F_RESYNC is unset. */
static void purge(void)
{
}
/* unused, INTERNAL_F_RESYNC is unset. Nothing to resync, we have no cache. */
static int resync(enum nf_conntrack_msg_type type,
struct nf_conntrack *ct,
void *data)
{
return NFCT_CB_CONTINUE;
}
static void
event_new_sync(struct nf_conntrack *ct, int origin)
{
struct nethdr *net;
/* this event has been triggered by me, skip */
if (origin != CTD_ORIGIN_NOT_ME)
return;
net = BUILD_NETMSG(ct, NET_T_STATE_NEW);
multichannel_send(STATE_SYNC(channel), net);
internal_bypass_stats.new++;
}
static void
event_update_sync(struct nf_conntrack *ct, int origin)
{
struct nethdr *net;
/* this event has been triggered by me, skip */
if (origin != CTD_ORIGIN_NOT_ME)
return;
net = BUILD_NETMSG(ct, NET_T_STATE_UPD);
multichannel_send(STATE_SYNC(channel), net);
internal_bypass_stats.upd++;
}
static int
event_destroy_sync(struct nf_conntrack *ct, int origin)
{
struct nethdr *net;
/* this event has been triggered by me, skip */
if (origin != CTD_ORIGIN_NOT_ME)
return 1;
net = BUILD_NETMSG(ct, NET_T_STATE_DEL);
multichannel_send(STATE_SYNC(channel), net);
internal_bypass_stats.del++;
return 1;
}
struct internal_handler internal_bypass = {
.init = _init,
.close = _close,
.dump = dump,
.flush = flush,
.stats = stats,
.stats_ext = stats,
.populate = populate,
.purge = purge,
.resync = resync,
.new = event_new_sync,
.update = event_update_sync,
.destroy = event_destroy_sync,
};
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