12 #include <libmnl/libmnl.h>
13 #include <linux/netfilter/nf_tables.h>
14 #include <libnftnl/expr.h>
15 #include <libnftnl/rule.h>
20 enum nft_registers sreg_addr;
21 enum nft_registers sreg_dev;
24 static int nftnl_expr_dup_set(
struct nftnl_expr *e, uint16_t type,
25 const void *data, uint32_t data_len)
30 case NFTNL_EXPR_DUP_SREG_ADDR:
31 memcpy(&dup->sreg_addr, data, data_len);
33 case NFTNL_EXPR_DUP_SREG_DEV:
34 memcpy(&dup->sreg_dev, data, data_len);
40 static const void *nftnl_expr_dup_get(
const struct nftnl_expr *e,
41 uint16_t type, uint32_t *data_len)
46 case NFTNL_EXPR_DUP_SREG_ADDR:
47 *data_len =
sizeof(dup->sreg_addr);
48 return &dup->sreg_addr;
49 case NFTNL_EXPR_DUP_SREG_DEV:
50 *data_len =
sizeof(dup->sreg_dev);
51 return &dup->sreg_dev;
56 static int nftnl_expr_dup_cb(
const struct nlattr *attr,
void *data)
58 const struct nlattr **tb = data;
59 int type = mnl_attr_get_type(attr);
61 if (mnl_attr_type_valid(attr, NFTA_DUP_MAX) < 0)
65 case NFTA_DUP_SREG_ADDR:
66 case NFTA_DUP_SREG_DEV:
67 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
76 static void nftnl_expr_dup_build(
struct nlmsghdr *nlh,
77 const struct nftnl_expr *e)
81 if (e->flags & (1 << NFTNL_EXPR_DUP_SREG_ADDR))
82 mnl_attr_put_u32(nlh, NFTA_DUP_SREG_ADDR, htonl(dup->sreg_addr));
83 if (e->flags & (1 << NFTNL_EXPR_DUP_SREG_DEV))
84 mnl_attr_put_u32(nlh, NFTA_DUP_SREG_DEV, htonl(dup->sreg_dev));
87 static int nftnl_expr_dup_parse(
struct nftnl_expr *e,
struct nlattr *attr)
90 struct nlattr *tb[NFTA_DUP_MAX + 1] = {};
93 if (mnl_attr_parse_nested(attr, nftnl_expr_dup_cb, tb) < 0)
96 if (tb[NFTA_DUP_SREG_ADDR]) {
97 dup->sreg_addr = ntohl(mnl_attr_get_u32(tb[NFTA_DUP_SREG_ADDR]));
98 e->flags |= (1 << NFTNL_EXPR_DUP_SREG_ADDR);
100 if (tb[NFTA_DUP_SREG_DEV]) {
101 dup->sreg_dev = ntohl(mnl_attr_get_u32(tb[NFTA_DUP_SREG_DEV]));
102 e->flags |= (1 << NFTNL_EXPR_DUP_SREG_DEV);
108 static int nftnl_expr_dup_snprintf(
char *buf,
size_t remain,
109 uint32_t flags,
const struct nftnl_expr *e)
114 if (e->flags & (1 << NFTNL_EXPR_DUP_SREG_ADDR)) {
115 ret = snprintf(buf + offset, remain,
"sreg_addr %u ", dup->sreg_addr);
116 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
119 if (e->flags & (1 << NFTNL_EXPR_DUP_SREG_DEV)) {
120 ret = snprintf(buf + offset, remain,
"sreg_dev %u ", dup->sreg_dev);
121 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
127 static struct attr_policy dup_attr_policy[__NFTNL_EXPR_DUP_MAX] = {
128 [NFTNL_EXPR_DUP_SREG_ADDR] = { .maxlen =
sizeof(uint32_t) },
129 [NFTNL_EXPR_DUP_SREG_DEV] = { .maxlen =
sizeof(uint32_t) },
132 struct expr_ops expr_ops_dup = {
135 .nftnl_max_attr = __NFTNL_EXPR_DUP_MAX - 1,
136 .attr_policy = dup_attr_policy,
137 .set = nftnl_expr_dup_set,
138 .get = nftnl_expr_dup_get,
139 .parse = nftnl_expr_dup_parse,
140 .build = nftnl_expr_dup_build,
141 .output = nftnl_expr_dup_snprintf,