12 #include <arpa/inet.h>
16 #include <linux/netfilter/nf_tables.h>
19 #include <libmnl/libmnl.h>
20 #include <libnftnl/expr.h>
21 #include <libnftnl/rule.h>
28 nftnl_expr_masq_set(
struct nftnl_expr *e, uint16_t type,
29 const void *data, uint32_t data_len)
34 case NFTNL_EXPR_MASQ_FLAGS:
35 masq->flags = *((uint32_t *)data);
44 nftnl_expr_masq_get(
const struct nftnl_expr *e, uint16_t type,
50 case NFTNL_EXPR_MASQ_FLAGS:
51 *data_len =
sizeof(masq->flags);
57 static int nftnl_expr_masq_cb(
const struct nlattr *attr,
void *data)
59 const struct nlattr **tb = data;
60 int type = mnl_attr_get_type(attr);
62 if (mnl_attr_type_valid(attr, NFTA_MASQ_MAX) < 0)
67 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
77 nftnl_expr_masq_build(
struct nlmsghdr *nlh,
struct nftnl_expr *e)
81 if (e->flags & (1 << NFTNL_EXPR_MASQ_FLAGS))
82 mnl_attr_put_u32(nlh, NFTA_MASQ_FLAGS, htobe32(masq->flags));
86 nftnl_expr_masq_parse(
struct nftnl_expr *e,
struct nlattr *attr)
89 struct nlattr *tb[NFTA_MASQ_MAX+1] = {};
91 if (mnl_attr_parse_nested(attr, nftnl_expr_masq_cb, tb) < 0)
94 if (tb[NFTA_MASQ_FLAGS]) {
95 masq->flags = be32toh(mnl_attr_get_u32(tb[NFTA_MASQ_FLAGS]));
96 e->flags |= (1 << NFTNL_EXPR_MASQ_FLAGS);
103 nftnl_expr_masq_json_parse(
struct nftnl_expr *e, json_t *root,
104 struct nftnl_parse_err *err)
109 if (nftnl_jansson_parse_val(root,
"flags", NFTNL_TYPE_U32, &flags,
111 nftnl_expr_set_u32(e, NFTNL_EXPR_MASQ_FLAGS, flags);
121 nftnl_expr_masq_xml_parse(
struct nftnl_expr *e, mxml_node_t *tree,
122 struct nftnl_parse_err *err)
127 if (nftnl_mxml_num_parse(tree,
"flags", MXML_DESCEND_FIRST, BASE_DEC,
128 &flags, NFTNL_TYPE_U32, NFTNL_XML_MAND, err) == 0)
129 nftnl_expr_set_u32(e, NFTNL_EXPR_MASQ_FLAGS, flags);
137 static int nftnl_expr_masq_export(
char *buf,
size_t size,
138 struct nftnl_expr *e,
int type)
141 NFTNL_BUF_INIT(b, buf, size);
143 if (e->flags & (1 << NFTNL_EXPR_MASQ_FLAGS))
144 nftnl_buf_u32(&b, type, masq->flags, FLAGS);
146 return nftnl_buf_done(&b);
149 static int nftnl_expr_masq_snprintf_default(
char *buf,
size_t len,
150 struct nftnl_expr *e)
154 if (e->flags & (1 << NFTNL_EXPR_MASQ_FLAGS))
155 return snprintf(buf, len,
"flags 0x%x ", masq->flags);
160 static int nftnl_expr_masq_snprintf(
char *buf,
size_t len, uint32_t type,
161 uint32_t flags,
struct nftnl_expr *e)
164 case NFTNL_OUTPUT_DEFAULT:
165 return nftnl_expr_masq_snprintf_default(buf, len, e);
166 case NFTNL_OUTPUT_XML:
167 case NFTNL_OUTPUT_JSON:
168 return nftnl_expr_masq_export(buf, len, e, type);
175 struct expr_ops expr_ops_masq = {
178 .max_attr = NFTA_MASQ_MAX,
179 .set = nftnl_expr_masq_set,
180 .get = nftnl_expr_masq_get,
181 .parse = nftnl_expr_masq_parse,
182 .build = nftnl_expr_masq_build,
183 .snprintf = nftnl_expr_masq_snprintf,
184 .xml_parse = nftnl_expr_masq_xml_parse,
185 .json_parse = nftnl_expr_masq_json_parse,