18#include <linux/netfilter/nf_tables.h>
21#include <libmnl/libmnl.h>
22#include <libnftnl/expr.h>
23#include <libnftnl/rule.h>
31nftnl_expr_counter_set(
struct nftnl_expr *e, uint16_t type,
32 const void *data, uint32_t data_len)
37 case NFTNL_EXPR_CTR_BYTES:
38 memcpy(&ctr->bytes, data,
sizeof(ctr->bytes));
40 case NFTNL_EXPR_CTR_PACKETS:
41 memcpy(&ctr->pkts, data,
sizeof(ctr->pkts));
50nftnl_expr_counter_get(
const struct nftnl_expr *e, uint16_t type,
56 case NFTNL_EXPR_CTR_BYTES:
57 *data_len =
sizeof(ctr->bytes);
59 case NFTNL_EXPR_CTR_PACKETS:
60 *data_len =
sizeof(ctr->pkts);
66static int nftnl_expr_counter_cb(
const struct nlattr *attr,
void *data)
68 const struct nlattr **tb = data;
69 int type = mnl_attr_get_type(attr);
71 if (mnl_attr_type_valid(attr, NFTA_COUNTER_MAX) < 0)
75 case NFTA_COUNTER_BYTES:
76 case NFTA_COUNTER_PACKETS:
77 if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0)
87nftnl_expr_counter_build(
struct nlmsghdr *nlh,
const struct nftnl_expr *e)
91 if (e->flags & (1 << NFTNL_EXPR_CTR_BYTES))
92 mnl_attr_put_u64(nlh, NFTA_COUNTER_BYTES, htobe64(ctr->bytes));
93 if (e->flags & (1 << NFTNL_EXPR_CTR_PACKETS))
94 mnl_attr_put_u64(nlh, NFTA_COUNTER_PACKETS, htobe64(ctr->pkts));
98nftnl_expr_counter_parse(
struct nftnl_expr *e,
struct nlattr *attr)
101 struct nlattr *tb[NFTA_COUNTER_MAX+1] = {};
103 if (mnl_attr_parse_nested(attr, nftnl_expr_counter_cb, tb) < 0)
106 if (tb[NFTA_COUNTER_BYTES]) {
107 ctr->bytes = be64toh(mnl_attr_get_u64(tb[NFTA_COUNTER_BYTES]));
108 e->flags |= (1 << NFTNL_EXPR_CTR_BYTES);
110 if (tb[NFTA_COUNTER_PACKETS]) {
111 ctr->pkts = be64toh(mnl_attr_get_u64(tb[NFTA_COUNTER_PACKETS]));
112 e->flags |= (1 << NFTNL_EXPR_CTR_PACKETS);
118static int nftnl_expr_counter_snprintf(
char *buf,
size_t len,
120 const struct nftnl_expr *e)
124 return snprintf(buf, len,
"pkts %"PRIu64
" bytes %"PRIu64
" ",
125 ctr->pkts, ctr->bytes);
128struct expr_ops expr_ops_counter = {
131 .max_attr = NFTA_COUNTER_MAX,
132 .set = nftnl_expr_counter_set,
133 .get = nftnl_expr_counter_get,
134 .parse = nftnl_expr_counter_parse,
135 .build = nftnl_expr_counter_build,
136 .output = nftnl_expr_counter_snprintf,