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/*
* (C) 2012-2016 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.
*/
#include <stdio.h>
#include <stdint.h>
#include <arpa/inet.h>
#include <errno.h>
#include <inttypes.h>
#include <linux/netfilter/nf_tables.h>
#include <libmnl/libmnl.h>
#include <libnftnl/object.h>
#include "internal.h"
#include "obj.h"
static int
nftnl_obj_counter_set(struct nftnl_obj *e, uint16_t type,
const void *data, uint32_t data_len)
{
struct nftnl_obj_counter *ctr = nftnl_obj_data(e);
switch(type) {
case NFTNL_OBJ_CTR_BYTES:
ctr->bytes = *((uint64_t *)data);
break;
case NFTNL_OBJ_CTR_PKTS:
ctr->pkts = *((uint64_t *)data);
break;
default:
return -1;
}
return 0;
}
static const void *
nftnl_obj_counter_get(const struct nftnl_obj *e, uint16_t type,
uint32_t *data_len)
{
struct nftnl_obj_counter *ctr = nftnl_obj_data(e);
switch(type) {
case NFTNL_OBJ_CTR_BYTES:
*data_len = sizeof(ctr->bytes);
return &ctr->bytes;
case NFTNL_OBJ_CTR_PKTS:
*data_len = sizeof(ctr->pkts);
return &ctr->pkts;
}
return NULL;
}
static int nftnl_obj_counter_cb(const struct nlattr *attr, void *data)
{
const struct nlattr **tb = data;
int type = mnl_attr_get_type(attr);
if (mnl_attr_type_valid(attr, NFTA_COUNTER_MAX) < 0)
return MNL_CB_OK;
switch(type) {
case NFTA_COUNTER_BYTES:
case NFTA_COUNTER_PACKETS:
if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0)
abi_breakage();
break;
}
tb[type] = attr;
return MNL_CB_OK;
}
static void
nftnl_obj_counter_build(struct nlmsghdr *nlh, const struct nftnl_obj *e)
{
struct nftnl_obj_counter *ctr = nftnl_obj_data(e);
if (e->flags & (1 << NFTNL_OBJ_CTR_BYTES))
mnl_attr_put_u64(nlh, NFTA_COUNTER_BYTES, htobe64(ctr->bytes));
if (e->flags & (1 << NFTNL_OBJ_CTR_PKTS))
mnl_attr_put_u64(nlh, NFTA_COUNTER_PACKETS, htobe64(ctr->pkts));
}
static int
nftnl_obj_counter_parse(struct nftnl_obj *e, struct nlattr *attr)
{
struct nftnl_obj_counter *ctr = nftnl_obj_data(e);
struct nlattr *tb[NFTA_COUNTER_MAX+1] = {};
if (mnl_attr_parse_nested(attr, nftnl_obj_counter_cb, tb) < 0)
return -1;
if (tb[NFTA_COUNTER_BYTES]) {
ctr->bytes = be64toh(mnl_attr_get_u64(tb[NFTA_COUNTER_BYTES]));
e->flags |= (1 << NFTNL_OBJ_CTR_BYTES);
}
if (tb[NFTA_COUNTER_PACKETS]) {
ctr->pkts = be64toh(mnl_attr_get_u64(tb[NFTA_COUNTER_PACKETS]));
e->flags |= (1 << NFTNL_OBJ_CTR_PKTS);
}
return 0;
}
static int
nftnl_obj_counter_json_parse(struct nftnl_obj *e, json_t *root,
struct nftnl_parse_err *err)
{
#ifdef JSON_PARSING
uint64_t uval64;
if (nftnl_jansson_parse_val(root, "pkts", NFTNL_TYPE_U64, &uval64,
err) == 0)
nftnl_obj_set_u64(e, NFTNL_OBJ_CTR_PKTS, uval64);
if (nftnl_jansson_parse_val(root, "bytes", NFTNL_TYPE_U64, &uval64,
err) == 0)
nftnl_obj_set_u64(e, NFTNL_OBJ_CTR_BYTES, uval64);
return 0;
#else
errno = EOPNOTSUPP;
return -1;
#endif
}
static int nftnl_obj_counter_export(char *buf, size_t size,
const struct nftnl_obj *e, int type)
{
struct nftnl_obj_counter *ctr = nftnl_obj_data(e);
NFTNL_BUF_INIT(b, buf, size);
if (e->flags & (1 << NFTNL_OBJ_CTR_PKTS))
nftnl_buf_u64(&b, type, ctr->pkts, PKTS);
if (e->flags & (1 << NFTNL_OBJ_CTR_BYTES))
nftnl_buf_u64(&b, type, ctr->bytes, BYTES);
return nftnl_buf_done(&b);
}
static int nftnl_obj_counter_snprintf_default(char *buf, size_t len,
const struct nftnl_obj *e)
{
struct nftnl_obj_counter *ctr = nftnl_obj_data(e);
return snprintf(buf, len, "pkts %"PRIu64" bytes %"PRIu64" ",
ctr->pkts, ctr->bytes);
}
static int nftnl_obj_counter_snprintf(char *buf, size_t len, uint32_t type,
uint32_t flags,
const struct nftnl_obj *e)
{
if (len)
buf[0] = '\0';
switch (type) {
case NFTNL_OUTPUT_DEFAULT:
return nftnl_obj_counter_snprintf_default(buf, len, e);
case NFTNL_OUTPUT_XML:
case NFTNL_OUTPUT_JSON:
return nftnl_obj_counter_export(buf, len, e, type);
default:
break;
}
return -1;
}
struct obj_ops obj_ops_counter = {
.name = "counter",
.type = NFT_OBJECT_COUNTER,
.alloc_len = sizeof(struct nftnl_obj_counter),
.max_attr = NFTA_COUNTER_MAX,
.set = nftnl_obj_counter_set,
.get = nftnl_obj_counter_get,
.parse = nftnl_obj_counter_parse,
.build = nftnl_obj_counter_build,
.snprintf = nftnl_obj_counter_snprintf,
.json_parse = nftnl_obj_counter_json_parse,
};
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