15#include <linux/netfilter/nf_tables.h>
18#include <libmnl/libmnl.h>
19#include <libnftnl/expr.h>
20#include <libnftnl/rule.h>
23 enum nft_socket_keys key;
24 enum nft_registers dreg;
29nftnl_expr_socket_set(
struct nftnl_expr *e, uint16_t type,
30 const void *data, uint32_t data_len)
35 case NFTNL_EXPR_SOCKET_KEY:
36 memcpy(&socket->key, data,
sizeof(socket->key));
38 case NFTNL_EXPR_SOCKET_DREG:
39 memcpy(&socket->dreg, data,
sizeof(socket->dreg));
41 case NFTNL_EXPR_SOCKET_LEVEL:
42 memcpy(&socket->level, data,
sizeof(socket->level));
51nftnl_expr_socket_get(
const struct nftnl_expr *e, uint16_t type,
57 case NFTNL_EXPR_SOCKET_KEY:
58 *data_len =
sizeof(socket->key);
60 case NFTNL_EXPR_SOCKET_DREG:
61 *data_len =
sizeof(socket->dreg);
63 case NFTNL_EXPR_SOCKET_LEVEL:
64 *data_len =
sizeof(socket->level);
65 return &socket->level;
70static int nftnl_expr_socket_cb(
const struct nlattr *attr,
void *data)
72 const struct nlattr **tb = data;
73 int type = mnl_attr_get_type(attr);
75 if (mnl_attr_type_valid(attr, NFTA_SOCKET_MAX) < 0)
80 case NFTA_SOCKET_DREG:
81 case NFTA_SOCKET_LEVEL:
82 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
92nftnl_expr_socket_build(
struct nlmsghdr *nlh,
const struct nftnl_expr *e)
96 if (e->flags & (1 << NFTNL_EXPR_SOCKET_KEY))
97 mnl_attr_put_u32(nlh, NFTA_SOCKET_KEY, htonl(socket->key));
98 if (e->flags & (1 << NFTNL_EXPR_SOCKET_DREG))
99 mnl_attr_put_u32(nlh, NFTA_SOCKET_DREG, htonl(socket->dreg));
100 if (e->flags & (1 << NFTNL_EXPR_SOCKET_LEVEL))
101 mnl_attr_put_u32(nlh, NFTA_SOCKET_LEVEL, htonl(socket->level));
105nftnl_expr_socket_parse(
struct nftnl_expr *e,
struct nlattr *attr)
108 struct nlattr *tb[NFTA_SOCKET_MAX+1] = {};
110 if (mnl_attr_parse_nested(attr, nftnl_expr_socket_cb, tb) < 0)
113 if (tb[NFTA_SOCKET_KEY]) {
114 socket->key = ntohl(mnl_attr_get_u32(tb[NFTA_SOCKET_KEY]));
115 e->flags |= (1 << NFTNL_EXPR_SOCKET_KEY);
117 if (tb[NFTA_SOCKET_DREG]) {
118 socket->dreg = ntohl(mnl_attr_get_u32(tb[NFTA_SOCKET_DREG]));
119 e->flags |= (1 << NFTNL_EXPR_SOCKET_DREG);
121 if (tb[NFTA_SOCKET_LEVEL]) {
122 socket->level = ntohl(mnl_attr_get_u32(tb[NFTA_SOCKET_LEVEL]));
123 e->flags |= (1 << NFTNL_EXPR_SOCKET_LEVEL);
129static const char *socket_key2str_array[NFT_SOCKET_MAX + 1] = {
130 [NFT_SOCKET_TRANSPARENT] =
"transparent",
131 [NFT_SOCKET_MARK] =
"mark",
132 [NFT_SOCKET_WILDCARD] =
"wildcard",
133 [NFT_SOCKET_CGROUPV2] =
"cgroupv2",
136static const char *socket_key2str(uint8_t key)
138 if (key < NFT_SOCKET_MAX + 1)
139 return socket_key2str_array[key];
145nftnl_expr_socket_snprintf(
char *buf,
size_t len,
146 uint32_t flags,
const struct nftnl_expr *e)
150 if (e->flags & (1 << NFTNL_EXPR_SOCKET_DREG)) {
151 return snprintf(buf, len,
"load %s => reg %u ",
152 socket_key2str(socket->key), socket->dreg);
154 if (e->flags & (1 << NFTNL_EXPR_SOCKET_LEVEL))
155 return snprintf(buf, len,
"level %u ", socket->level);
160struct expr_ops expr_ops_socket = {
163 .max_attr = NFTA_SOCKET_MAX,
164 .set = nftnl_expr_socket_set,
165 .get = nftnl_expr_socket_get,
166 .parse = nftnl_expr_socket_parse,
167 .build = nftnl_expr_socket_build,
168 .output = nftnl_expr_socket_snprintf,