15#include <linux/netfilter/nf_tables.h>
18#include <libmnl/libmnl.h>
19#include <libnftnl/expr.h>
20#include <libnftnl/rule.h>
24 enum nft_registers dreg;
28nftnl_expr_rt_set(
struct nftnl_expr *e, uint16_t type,
29 const void *data, uint32_t data_len)
34 case NFTNL_EXPR_RT_KEY:
35 memcpy(&rt->key, data,
sizeof(rt->key));
37 case NFTNL_EXPR_RT_DREG:
38 memcpy(&rt->dreg, data,
sizeof(rt->dreg));
47nftnl_expr_rt_get(
const struct nftnl_expr *e, uint16_t type,
53 case NFTNL_EXPR_RT_KEY:
54 *data_len =
sizeof(rt->key);
56 case NFTNL_EXPR_RT_DREG:
57 *data_len =
sizeof(rt->dreg);
63static int nftnl_expr_rt_cb(
const struct nlattr *attr,
void *data)
65 const struct nlattr **tb = data;
66 int type = mnl_attr_get_type(attr);
68 if (mnl_attr_type_valid(attr, NFTA_RT_MAX) < 0)
74 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
84nftnl_expr_rt_build(
struct nlmsghdr *nlh,
const struct nftnl_expr *e)
88 if (e->flags & (1 << NFTNL_EXPR_RT_KEY))
89 mnl_attr_put_u32(nlh, NFTA_RT_KEY, htonl(rt->key));
90 if (e->flags & (1 << NFTNL_EXPR_RT_DREG))
91 mnl_attr_put_u32(nlh, NFTA_RT_DREG, htonl(rt->dreg));
95nftnl_expr_rt_parse(
struct nftnl_expr *e,
struct nlattr *attr)
98 struct nlattr *tb[NFTA_RT_MAX+1] = {};
100 if (mnl_attr_parse_nested(attr, nftnl_expr_rt_cb, tb) < 0)
103 if (tb[NFTA_RT_KEY]) {
104 rt->key = ntohl(mnl_attr_get_u32(tb[NFTA_RT_KEY]));
105 e->flags |= (1 << NFTNL_EXPR_RT_KEY);
107 if (tb[NFTA_RT_DREG]) {
108 rt->dreg = ntohl(mnl_attr_get_u32(tb[NFTA_RT_DREG]));
109 e->flags |= (1 << NFTNL_EXPR_RT_DREG);
115static const char *rt_key2str_array[NFT_RT_MAX + 1] = {
116 [NFT_RT_CLASSID] =
"classid",
117 [NFT_RT_NEXTHOP4] =
"nexthop4",
118 [NFT_RT_NEXTHOP6] =
"nexthop6",
119 [NFT_RT_TCPMSS] =
"tcpmss",
120 [NFT_RT_XFRM] =
"ipsec",
123static const char *rt_key2str(uint8_t key)
125 if (key <= NFT_RT_MAX)
126 return rt_key2str_array[key];
131static inline int str2rt_key(
const char *str)
135 for (i = 0; i < NFT_RT_MAX; i++) {
136 if (strcmp(str, rt_key2str_array[i]) == 0)
145nftnl_expr_rt_snprintf(
char *buf,
size_t len,
146 uint32_t flags,
const struct nftnl_expr *e)
150 if (e->flags & (1 << NFTNL_EXPR_RT_DREG)) {
151 return snprintf(buf, len,
"load %s => reg %u ",
152 rt_key2str(rt->key), rt->dreg);
157struct expr_ops expr_ops_rt = {
160 .max_attr = NFTA_RT_MAX,
161 .set = nftnl_expr_rt_set,
162 .get = nftnl_expr_rt_get,
163 .parse = nftnl_expr_rt_parse,
164 .build = nftnl_expr_rt_build,
165 .output = nftnl_expr_rt_snprintf,