13 #include <arpa/inet.h>
16 #include <libmnl/libmnl.h>
17 #include <linux/netfilter/nf_tables.h>
18 #include <libnftnl/expr.h>
19 #include <libnftnl/rule.h>
24 enum nft_registers sreg_addr;
25 enum nft_registers sreg_dev;
28 static int nftnl_expr_dup_set(
struct nftnl_expr *e, uint16_t type,
29 const void *data, uint32_t data_len)
34 case NFTNL_EXPR_DUP_SREG_ADDR:
35 memcpy(&dup->sreg_addr, data, data_len);
37 case NFTNL_EXPR_DUP_SREG_DEV:
38 memcpy(&dup->sreg_dev, data, data_len);
44 static const void *nftnl_expr_dup_get(
const struct nftnl_expr *e,
45 uint16_t type, uint32_t *data_len)
50 case NFTNL_EXPR_DUP_SREG_ADDR:
51 *data_len =
sizeof(dup->sreg_addr);
52 return &dup->sreg_addr;
53 case NFTNL_EXPR_DUP_SREG_DEV:
54 *data_len =
sizeof(dup->sreg_dev);
55 return &dup->sreg_dev;
60 static int nftnl_expr_dup_cb(
const struct nlattr *attr,
void *data)
62 const struct nlattr **tb = data;
63 int type = mnl_attr_get_type(attr);
65 if (mnl_attr_type_valid(attr, NFTA_DUP_MAX) < 0)
69 case NFTA_DUP_SREG_ADDR:
70 case NFTA_DUP_SREG_DEV:
71 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
80 static void nftnl_expr_dup_build(
struct nlmsghdr *nlh,
81 const struct nftnl_expr *e)
85 if (e->flags & (1 << NFTNL_EXPR_DUP_SREG_ADDR))
86 mnl_attr_put_u32(nlh, NFTA_DUP_SREG_ADDR, htonl(dup->sreg_addr));
87 if (e->flags & (1 << NFTNL_EXPR_DUP_SREG_DEV))
88 mnl_attr_put_u32(nlh, NFTA_DUP_SREG_DEV, htonl(dup->sreg_dev));
91 static int nftnl_expr_dup_parse(
struct nftnl_expr *e,
struct nlattr *attr)
94 struct nlattr *tb[NFTA_DUP_MAX + 1] = {};
97 if (mnl_attr_parse_nested(attr, nftnl_expr_dup_cb, tb) < 0)
100 if (tb[NFTA_DUP_SREG_ADDR]) {
101 dup->sreg_addr = ntohl(mnl_attr_get_u32(tb[NFTA_DUP_SREG_ADDR]));
102 e->flags |= (1 << NFTNL_EXPR_DUP_SREG_ADDR);
104 if (tb[NFTA_DUP_SREG_DEV]) {
105 dup->sreg_dev = ntohl(mnl_attr_get_u32(tb[NFTA_DUP_SREG_DEV]));
106 e->flags |= (1 << NFTNL_EXPR_DUP_SREG_DEV);
112 static int nftnl_expr_dup_snprintf(
char *buf,
size_t remain,
113 uint32_t flags,
const struct nftnl_expr *e)
118 if (e->flags & (1 << NFTNL_EXPR_DUP_SREG_ADDR)) {
119 ret = snprintf(buf + offset, remain,
"sreg_addr %u ", dup->sreg_addr);
120 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
123 if (e->flags & (1 << NFTNL_EXPR_DUP_SREG_DEV)) {
124 ret = snprintf(buf + offset, remain,
"sreg_dev %u ", dup->sreg_dev);
125 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
131 static struct attr_policy dup_attr_policy[__NFTNL_EXPR_DUP_MAX] = {
132 [NFTNL_EXPR_DUP_SREG_ADDR] = { .maxlen =
sizeof(uint32_t) },
133 [NFTNL_EXPR_DUP_SREG_DEV] = { .maxlen =
sizeof(uint32_t) },
136 struct expr_ops expr_ops_dup = {
139 .nftnl_max_attr = __NFTNL_EXPR_DUP_MAX - 1,
140 .attr_policy = dup_attr_policy,
141 .set = nftnl_expr_dup_set,
142 .get = nftnl_expr_dup_get,
143 .parse = nftnl_expr_dup_parse,
144 .build = nftnl_expr_dup_build,
145 .output = nftnl_expr_dup_snprintf,