15 #include <arpa/inet.h>
17 #include <linux/netfilter/nf_tables.h>
20 #include <libmnl/libmnl.h>
21 #include <libnftnl/expr.h>
22 #include <libnftnl/rule.h>
29 static 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 reject->type = *((uint32_t *)data);
38 case NFTNL_EXPR_REJECT_CODE:
39 reject->icmp_code = *((uint8_t *)data);
48 nftnl_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;
64 static 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)
88 nftnl_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);
99 nftnl_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);
120 nftnl_expr_reject_json_parse(
struct nftnl_expr *e, json_t *root,
121 struct nftnl_parse_err *err)
127 if (nftnl_jansson_parse_val(root,
"type", NFTNL_TYPE_U32, &type, err) == 0)
128 nftnl_expr_set_u32(e, NFTNL_EXPR_REJECT_TYPE, type);
130 if (nftnl_jansson_parse_val(root,
"code", NFTNL_TYPE_U8, &code, err) == 0)
131 nftnl_expr_set_u8(e, NFTNL_EXPR_REJECT_CODE, code);
141 nftnl_expr_reject_xml_parse(
struct nftnl_expr *e, mxml_node_t *tree,
142 struct nftnl_parse_err *err)
148 if (nftnl_mxml_num_parse(tree,
"type", MXML_DESCEND_FIRST, BASE_DEC,
149 &type, NFTNL_TYPE_U32, NFTNL_XML_MAND, err) == 0)
150 nftnl_expr_set_u32(e, NFTNL_EXPR_REJECT_TYPE, type);
152 if (nftnl_mxml_num_parse(tree,
"code", MXML_DESCEND_FIRST, BASE_DEC,
153 &code, NFTNL_TYPE_U8, NFTNL_XML_MAND, err) == 0)
154 nftnl_expr_set_u8(e, NFTNL_EXPR_REJECT_CODE, code);
163 static int nftnl_expr_reject_snprintf_default(
char *buf,
size_t len,
164 const struct nftnl_expr *e)
168 return snprintf(buf, len,
"type %u code %u ",
169 reject->type, reject->icmp_code);
172 static int nftnl_expr_reject_export(
char *buf,
size_t size,
173 const struct nftnl_expr *e,
int type)
176 NFTNL_BUF_INIT(b, buf, size);
178 if (e->flags & (1 << NFTNL_EXPR_REJECT_TYPE))
179 nftnl_buf_u32(&b, type, reject->type, TYPE);
180 if (e->flags & (1 << NFTNL_EXPR_REJECT_CODE))
181 nftnl_buf_u32(&b, type, reject->icmp_code, CODE);
183 return nftnl_buf_done(&b);
187 nftnl_expr_reject_snprintf(
char *buf,
size_t len, uint32_t type,
188 uint32_t flags,
const struct nftnl_expr *e)
191 case NFTNL_OUTPUT_DEFAULT:
192 return nftnl_expr_reject_snprintf_default(buf, len, e);
193 case NFTNL_OUTPUT_XML:
194 case NFTNL_OUTPUT_JSON:
195 return nftnl_expr_reject_export(buf, len, e, type);
202 struct expr_ops expr_ops_reject = {
205 .max_attr = NFTA_REJECT_MAX,
206 .set = nftnl_expr_reject_set,
207 .get = nftnl_expr_reject_get,
208 .parse = nftnl_expr_reject_parse,
209 .build = nftnl_expr_reject_build,
210 .snprintf = nftnl_expr_reject_snprintf,
211 .xml_parse = nftnl_expr_reject_xml_parse,
212 .json_parse = nftnl_expr_reject_json_parse,