10 #include <arpa/inet.h>
14 #include <linux/netfilter/nf_tables.h>
17 #include <libmnl/libmnl.h>
18 #include <libnftnl/expr.h>
19 #include <libnftnl/rule.h>
27 nftnl_expr_counter_set(
struct nftnl_expr *e, uint16_t type,
28 const void *data, uint32_t data_len)
33 case NFTNL_EXPR_CTR_BYTES:
34 memcpy(&ctr->bytes, data, data_len);
36 case NFTNL_EXPR_CTR_PACKETS:
37 memcpy(&ctr->pkts, data, data_len);
44 nftnl_expr_counter_get(
const struct nftnl_expr *e, uint16_t type,
50 case NFTNL_EXPR_CTR_BYTES:
51 *data_len =
sizeof(ctr->bytes);
53 case NFTNL_EXPR_CTR_PACKETS:
54 *data_len =
sizeof(ctr->pkts);
60 static int nftnl_expr_counter_cb(
const struct nlattr *attr,
void *data)
62 const struct nlattr **tb = data;
63 int type = mnl_attr_get_type(attr);
65 if (mnl_attr_type_valid(attr, NFTA_COUNTER_MAX) < 0)
69 case NFTA_COUNTER_BYTES:
70 case NFTA_COUNTER_PACKETS:
71 if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0)
81 nftnl_expr_counter_build(
struct nlmsghdr *nlh,
const struct nftnl_expr *e)
85 if (e->flags & (1 << NFTNL_EXPR_CTR_BYTES))
86 mnl_attr_put_u64(nlh, NFTA_COUNTER_BYTES, htobe64(ctr->bytes));
87 if (e->flags & (1 << NFTNL_EXPR_CTR_PACKETS))
88 mnl_attr_put_u64(nlh, NFTA_COUNTER_PACKETS, htobe64(ctr->pkts));
92 nftnl_expr_counter_parse(
struct nftnl_expr *e,
struct nlattr *attr)
95 struct nlattr *tb[NFTA_COUNTER_MAX+1] = {};
97 if (mnl_attr_parse_nested(attr, nftnl_expr_counter_cb, tb) < 0)
100 if (tb[NFTA_COUNTER_BYTES]) {
101 ctr->bytes = be64toh(mnl_attr_get_u64(tb[NFTA_COUNTER_BYTES]));
102 e->flags |= (1 << NFTNL_EXPR_CTR_BYTES);
104 if (tb[NFTA_COUNTER_PACKETS]) {
105 ctr->pkts = be64toh(mnl_attr_get_u64(tb[NFTA_COUNTER_PACKETS]));
106 e->flags |= (1 << NFTNL_EXPR_CTR_PACKETS);
112 static int nftnl_expr_counter_snprintf(
char *buf,
size_t len,
114 const struct nftnl_expr *e)
118 return snprintf(buf, len,
"pkts %"PRIu64
" bytes %"PRIu64
" ",
119 ctr->pkts, ctr->bytes);
122 static struct attr_policy counter_attr_policy[__NFTNL_EXPR_CTR_MAX] = {
123 [NFTNL_EXPR_CTR_PACKETS] = { .maxlen =
sizeof(uint64_t) },
124 [NFTNL_EXPR_CTR_BYTES] = { .maxlen =
sizeof(uint64_t) },
127 struct expr_ops expr_ops_counter = {
130 .nftnl_max_attr = __NFTNL_EXPR_CTR_MAX - 1,
131 .attr_policy = counter_attr_policy,
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,