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>
25 enum nft_registers sreg_addr;
26 enum nft_registers sreg_dev;
29 static int nftnl_expr_dup_set(
struct nftnl_expr *e, uint16_t type,
30 const void *data, uint32_t data_len)
35 case NFTNL_EXPR_DUP_SREG_ADDR:
36 memcpy(&dup->sreg_addr, data,
sizeof(dup->sreg_addr));
38 case NFTNL_EXPR_DUP_SREG_DEV:
39 memcpy(&dup->sreg_dev, data,
sizeof(dup->sreg_dev));
47 static const void *nftnl_expr_dup_get(
const struct nftnl_expr *e,
48 uint16_t type, uint32_t *data_len)
53 case NFTNL_EXPR_DUP_SREG_ADDR:
54 *data_len =
sizeof(dup->sreg_addr);
55 return &dup->sreg_addr;
56 case NFTNL_EXPR_DUP_SREG_DEV:
57 *data_len =
sizeof(dup->sreg_dev);
58 return &dup->sreg_dev;
63 static int nftnl_expr_dup_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_DUP_MAX) < 0)
72 case NFTA_DUP_SREG_ADDR:
73 case NFTA_DUP_SREG_DEV:
74 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
83 static void nftnl_expr_dup_build(
struct nlmsghdr *nlh,
84 const struct nftnl_expr *e)
88 if (e->flags & (1 << NFTNL_EXPR_DUP_SREG_ADDR))
89 mnl_attr_put_u32(nlh, NFTA_DUP_SREG_ADDR, htonl(dup->sreg_addr));
90 if (e->flags & (1 << NFTNL_EXPR_DUP_SREG_DEV))
91 mnl_attr_put_u32(nlh, NFTA_DUP_SREG_DEV, htonl(dup->sreg_dev));
94 static int nftnl_expr_dup_parse(
struct nftnl_expr *e,
struct nlattr *attr)
97 struct nlattr *tb[NFTA_DUP_MAX + 1] = {};
100 if (mnl_attr_parse_nested(attr, nftnl_expr_dup_cb, tb) < 0)
103 if (tb[NFTA_DUP_SREG_ADDR]) {
104 dup->sreg_addr = ntohl(mnl_attr_get_u32(tb[NFTA_DUP_SREG_ADDR]));
105 e->flags |= (1 << NFTNL_EXPR_DUP_SREG_ADDR);
107 if (tb[NFTA_DUP_SREG_DEV]) {
108 dup->sreg_dev = ntohl(mnl_attr_get_u32(tb[NFTA_DUP_SREG_DEV]));
109 e->flags |= (1 << NFTNL_EXPR_DUP_SREG_DEV);
115 static int nftnl_expr_dup_snprintf_default(
char *buf,
size_t len,
116 const struct nftnl_expr *e,
119 int remain = len, offset = 0, ret;
122 if (e->flags & (1 << NFTNL_EXPR_DUP_SREG_ADDR)) {
123 ret = snprintf(buf + offset, len,
"sreg_addr %u ", dup->sreg_addr);
124 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
127 if (e->flags & (1 << NFTNL_EXPR_DUP_SREG_DEV)) {
128 ret = snprintf(buf + offset, len,
"sreg_dev %u ", dup->sreg_dev);
129 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
135 static int nftnl_expr_dup_snprintf(
char *buf,
size_t len, uint32_t type,
136 uint32_t flags,
const struct nftnl_expr *e)
139 case NFTNL_OUTPUT_DEFAULT:
140 return nftnl_expr_dup_snprintf_default(buf, len, e, flags);
141 case NFTNL_OUTPUT_XML:
142 case NFTNL_OUTPUT_JSON:
149 struct expr_ops expr_ops_dup = {
152 .max_attr = NFTA_DUP_MAX,
153 .set = nftnl_expr_dup_set,
154 .get = nftnl_expr_dup_get,
155 .parse = nftnl_expr_dup_parse,
156 .build = nftnl_expr_dup_build,
157 .snprintf = nftnl_expr_dup_snprintf,