17#include <linux/netfilter/nf_tables.h>
20#include <libmnl/libmnl.h>
21#include <libnftnl/expr.h>
22#include <libnftnl/rule.h>
29static int nftnl_expr_reject_set(
struct nftnl_expr *e, uint16_t type,
30 const void *data, uint32_t data_len)
35 case NFTNL_EXPR_REJECT_TYPE:
36 memcpy(&reject->type, data,
sizeof(reject->type));
38 case NFTNL_EXPR_REJECT_CODE:
39 memcpy(&reject->icmp_code, data,
sizeof(reject->icmp_code));
48nftnl_expr_reject_get(
const struct nftnl_expr *e, uint16_t type,
54 case NFTNL_EXPR_REJECT_TYPE:
55 *data_len =
sizeof(reject->type);
57 case NFTNL_EXPR_REJECT_CODE:
58 *data_len =
sizeof(reject->icmp_code);
59 return &reject->icmp_code;
64static int nftnl_expr_reject_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_REJECT_MAX) < 0)
73 case NFTA_REJECT_TYPE:
74 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
77 case NFTA_REJECT_ICMP_CODE:
78 if (mnl_attr_validate(attr, MNL_TYPE_U8) < 0)
88nftnl_expr_reject_build(
struct nlmsghdr *nlh,
const struct nftnl_expr *e)
92 if (e->flags & (1 << NFTNL_EXPR_REJECT_TYPE))
93 mnl_attr_put_u32(nlh, NFTA_REJECT_TYPE, htonl(reject->type));
94 if (e->flags & (1 << NFTNL_EXPR_REJECT_CODE))
95 mnl_attr_put_u8(nlh, NFTA_REJECT_ICMP_CODE, reject->icmp_code);
99nftnl_expr_reject_parse(
struct nftnl_expr *e,
struct nlattr *attr)
102 struct nlattr *tb[NFTA_REJECT_MAX+1] = {};
104 if (mnl_attr_parse_nested(attr, nftnl_expr_reject_cb, tb) < 0)
107 if (tb[NFTA_REJECT_TYPE]) {
108 reject->type = ntohl(mnl_attr_get_u32(tb[NFTA_REJECT_TYPE]));
109 e->flags |= (1 << NFTNL_EXPR_REJECT_TYPE);
111 if (tb[NFTA_REJECT_ICMP_CODE]) {
112 reject->icmp_code = mnl_attr_get_u8(tb[NFTA_REJECT_ICMP_CODE]);
113 e->flags |= (1 << NFTNL_EXPR_REJECT_CODE);
120nftnl_expr_reject_snprintf(
char *buf,
size_t len,
121 uint32_t flags,
const struct nftnl_expr *e)
125 return snprintf(buf, len,
"type %u code %u ",
126 reject->type, reject->icmp_code);
129struct expr_ops expr_ops_reject = {
132 .max_attr = NFTA_REJECT_MAX,
133 .set = nftnl_expr_reject_set,
134 .get = nftnl_expr_reject_get,
135 .parse = nftnl_expr_reject_parse,
136 .build = nftnl_expr_reject_build,
137 .output = nftnl_expr_reject_snprintf,