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/*
* (C) 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 "internal.h"
#include <libmnl/libmnl.h>
#include <libnftnl/expr.h>
#include <libnftnl/rule.h>
struct nftnl_expr_quota {
uint64_t bytes;
uint64_t consumed;
uint32_t flags;
};
static int nftnl_expr_quota_set(struct nftnl_expr *e, uint16_t type,
const void *data, uint32_t data_len)
{
struct nftnl_expr_quota *quota = nftnl_expr_data(e);
switch (type) {
case NFTNL_EXPR_QUOTA_BYTES:
memcpy("a->bytes, data, sizeof(quota->bytes));
break;
case NFTNL_EXPR_QUOTA_CONSUMED:
memcpy("a->consumed, data, sizeof(quota->consumed));
break;
case NFTNL_EXPR_QUOTA_FLAGS:
memcpy("a->flags, data, sizeof(quota->flags));
break;
default:
return -1;
}
return 0;
}
static const void *nftnl_expr_quota_get(const struct nftnl_expr *e,
uint16_t type, uint32_t *data_len)
{
struct nftnl_expr_quota *quota = nftnl_expr_data(e);
switch (type) {
case NFTNL_EXPR_QUOTA_BYTES:
*data_len = sizeof(quota->bytes);
return "a->bytes;
case NFTNL_EXPR_QUOTA_CONSUMED:
*data_len = sizeof(quota->consumed);
return "a->consumed;
case NFTNL_EXPR_QUOTA_FLAGS:
*data_len = sizeof(quota->flags);
return "a->flags;
}
return NULL;
}
static int nftnl_expr_quota_cb(const struct nlattr *attr, void *data)
{
int type = mnl_attr_get_type(attr);
const struct nlattr **tb = data;
if (mnl_attr_type_valid(attr, NFTA_QUOTA_MAX) < 0)
return MNL_CB_OK;
switch(type) {
case NFTA_QUOTA_BYTES:
case NFTA_QUOTA_CONSUMED:
if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0)
abi_breakage();
break;
case NFTA_QUOTA_FLAGS:
if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
abi_breakage();
break;
}
tb[type] = attr;
return MNL_CB_OK;
}
static void
nftnl_expr_quota_build(struct nlmsghdr *nlh, const struct nftnl_expr *e)
{
struct nftnl_expr_quota *quota = nftnl_expr_data(e);
if (e->flags & (1 << NFTNL_EXPR_QUOTA_BYTES))
mnl_attr_put_u64(nlh, NFTA_QUOTA_BYTES, htobe64(quota->bytes));
if (e->flags & (1 << NFTNL_EXPR_QUOTA_CONSUMED))
mnl_attr_put_u64(nlh, NFTA_QUOTA_CONSUMED, htobe64(quota->consumed));
if (e->flags & (1 << NFTNL_EXPR_QUOTA_FLAGS))
mnl_attr_put_u32(nlh, NFTA_QUOTA_FLAGS, htonl(quota->flags));
}
static int
nftnl_expr_quota_parse(struct nftnl_expr *e, struct nlattr *attr)
{
struct nftnl_expr_quota *quota = nftnl_expr_data(e);
struct nlattr *tb[NFTA_QUOTA_MAX + 1] = {};
if (mnl_attr_parse_nested(attr, nftnl_expr_quota_cb, tb) < 0)
return -1;
if (tb[NFTA_QUOTA_BYTES]) {
quota->bytes = be64toh(mnl_attr_get_u64(tb[NFTA_QUOTA_BYTES]));
e->flags |= (1 << NFTNL_EXPR_QUOTA_BYTES);
}
if (tb[NFTA_QUOTA_CONSUMED]) {
quota->consumed = be64toh(mnl_attr_get_u64(tb[NFTA_QUOTA_CONSUMED]));
e->flags |= (1 << NFTNL_EXPR_QUOTA_CONSUMED);
}
if (tb[NFTA_QUOTA_FLAGS]) {
quota->flags = ntohl(mnl_attr_get_u32(tb[NFTA_QUOTA_FLAGS]));
e->flags |= (1 << NFTNL_EXPR_QUOTA_FLAGS);
}
return 0;
}
static int nftnl_expr_quota_snprintf(char *buf, size_t len,
uint32_t flags,
const struct nftnl_expr *e)
{
struct nftnl_expr_quota *quota = nftnl_expr_data(e);
return snprintf(buf, len,
"bytes %"PRIu64" consumed %"PRIu64" flags %u ",
quota->bytes, quota->consumed, quota->flags);
}
struct expr_ops expr_ops_quota = {
.name = "quota",
.alloc_len = sizeof(struct nftnl_expr_quota),
.max_attr = NFTA_QUOTA_MAX,
.set = nftnl_expr_quota_set,
.get = nftnl_expr_quota_get,
.parse = nftnl_expr_quota_parse,
.build = nftnl_expr_quota_build,
.output = nftnl_expr_quota_snprintf,
};
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