14 #include <arpa/inet.h>
18 #include <linux/netfilter/nf_tables.h>
21 #include <libmnl/libmnl.h>
22 #include <libnftnl/expr.h>
23 #include <libnftnl/rule.h>
31 nftnl_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, data_len);
40 case NFTNL_EXPR_CTR_PACKETS:
41 memcpy(&ctr->pkts, data, data_len);
48 nftnl_expr_counter_get(
const struct nftnl_expr *e, uint16_t type,
54 case NFTNL_EXPR_CTR_BYTES:
55 *data_len =
sizeof(ctr->bytes);
57 case NFTNL_EXPR_CTR_PACKETS:
58 *data_len =
sizeof(ctr->pkts);
64 static int nftnl_expr_counter_cb(
const struct nlattr *attr,
void *data)
66 const struct nlattr **tb = data;
67 int type = mnl_attr_get_type(attr);
69 if (mnl_attr_type_valid(attr, NFTA_COUNTER_MAX) < 0)
73 case NFTA_COUNTER_BYTES:
74 case NFTA_COUNTER_PACKETS:
75 if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0)
85 nftnl_expr_counter_build(
struct nlmsghdr *nlh,
const struct nftnl_expr *e)
89 if (e->flags & (1 << NFTNL_EXPR_CTR_BYTES))
90 mnl_attr_put_u64(nlh, NFTA_COUNTER_BYTES, htobe64(ctr->bytes));
91 if (e->flags & (1 << NFTNL_EXPR_CTR_PACKETS))
92 mnl_attr_put_u64(nlh, NFTA_COUNTER_PACKETS, htobe64(ctr->pkts));
96 nftnl_expr_counter_parse(
struct nftnl_expr *e,
struct nlattr *attr)
99 struct nlattr *tb[NFTA_COUNTER_MAX+1] = {};
101 if (mnl_attr_parse_nested(attr, nftnl_expr_counter_cb, tb) < 0)
104 if (tb[NFTA_COUNTER_BYTES]) {
105 ctr->bytes = be64toh(mnl_attr_get_u64(tb[NFTA_COUNTER_BYTES]));
106 e->flags |= (1 << NFTNL_EXPR_CTR_BYTES);
108 if (tb[NFTA_COUNTER_PACKETS]) {
109 ctr->pkts = be64toh(mnl_attr_get_u64(tb[NFTA_COUNTER_PACKETS]));
110 e->flags |= (1 << NFTNL_EXPR_CTR_PACKETS);
116 static int nftnl_expr_counter_snprintf(
char *buf,
size_t len,
118 const struct nftnl_expr *e)
122 return snprintf(buf, len,
"pkts %"PRIu64
" bytes %"PRIu64
" ",
123 ctr->pkts, ctr->bytes);
126 static struct attr_policy counter_attr_policy[__NFTNL_EXPR_CTR_MAX] = {
127 [NFTNL_EXPR_CTR_PACKETS] = { .maxlen =
sizeof(uint64_t) },
128 [NFTNL_EXPR_CTR_BYTES] = { .maxlen =
sizeof(uint64_t) },
131 struct expr_ops expr_ops_counter = {
134 .nftnl_max_attr = __NFTNL_EXPR_CTR_MAX - 1,
135 .attr_policy = counter_attr_policy,
136 .set = nftnl_expr_counter_set,
137 .get = nftnl_expr_counter_get,
138 .parse = nftnl_expr_counter_parse,
139 .build = nftnl_expr_counter_build,
140 .output = nftnl_expr_counter_snprintf,