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,
sizeof(dup->sreg_addr));
37 case NFTNL_EXPR_DUP_SREG_DEV:
38 memcpy(&dup->sreg_dev, data,
sizeof(dup->sreg_dev));
46 static const void *nftnl_expr_dup_get(
const struct nftnl_expr *e,
47 uint16_t type, uint32_t *data_len)
52 case NFTNL_EXPR_DUP_SREG_ADDR:
53 *data_len =
sizeof(dup->sreg_addr);
54 return &dup->sreg_addr;
55 case NFTNL_EXPR_DUP_SREG_DEV:
56 *data_len =
sizeof(dup->sreg_dev);
57 return &dup->sreg_dev;
62 static int nftnl_expr_dup_cb(
const struct nlattr *attr,
void *data)
64 const struct nlattr **tb = data;
65 int type = mnl_attr_get_type(attr);
67 if (mnl_attr_type_valid(attr, NFTA_DUP_MAX) < 0)
71 case NFTA_DUP_SREG_ADDR:
72 case NFTA_DUP_SREG_DEV:
73 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
82 static void nftnl_expr_dup_build(
struct nlmsghdr *nlh,
83 const struct nftnl_expr *e)
87 if (e->flags & (1 << NFTNL_EXPR_DUP_SREG_ADDR))
88 mnl_attr_put_u32(nlh, NFTA_DUP_SREG_ADDR, htonl(dup->sreg_addr));
89 if (e->flags & (1 << NFTNL_EXPR_DUP_SREG_DEV))
90 mnl_attr_put_u32(nlh, NFTA_DUP_SREG_DEV, htonl(dup->sreg_dev));
93 static int nftnl_expr_dup_parse(
struct nftnl_expr *e,
struct nlattr *attr)
96 struct nlattr *tb[NFTA_DUP_MAX + 1] = {};
99 if (mnl_attr_parse_nested(attr, nftnl_expr_dup_cb, tb) < 0)
102 if (tb[NFTA_DUP_SREG_ADDR]) {
103 dup->sreg_addr = ntohl(mnl_attr_get_u32(tb[NFTA_DUP_SREG_ADDR]));
104 e->flags |= (1 << NFTNL_EXPR_DUP_SREG_ADDR);
106 if (tb[NFTA_DUP_SREG_DEV]) {
107 dup->sreg_dev = ntohl(mnl_attr_get_u32(tb[NFTA_DUP_SREG_DEV]));
108 e->flags |= (1 << NFTNL_EXPR_DUP_SREG_DEV);
114 static int nftnl_expr_dup_snprintf_default(
char *buf,
size_t len,
115 const struct nftnl_expr *e,
118 int remain = len, offset = 0, ret;
121 if (e->flags & (1 << NFTNL_EXPR_DUP_SREG_ADDR)) {
122 ret = snprintf(buf + offset, len,
"sreg_addr %u ", dup->sreg_addr);
123 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
126 if (e->flags & (1 << NFTNL_EXPR_DUP_SREG_DEV)) {
127 ret = snprintf(buf + offset, len,
"sreg_dev %u ", dup->sreg_dev);
128 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
134 static int nftnl_expr_dup_snprintf(
char *buf,
size_t len, uint32_t type,
135 uint32_t flags,
const struct nftnl_expr *e)
138 case NFTNL_OUTPUT_DEFAULT:
139 return nftnl_expr_dup_snprintf_default(buf, len, e, flags);
140 case NFTNL_OUTPUT_XML:
141 case NFTNL_OUTPUT_JSON:
148 struct expr_ops expr_ops_dup = {
151 .max_attr = NFTA_DUP_MAX,
152 .set = nftnl_expr_dup_set,
153 .get = nftnl_expr_dup_get,
154 .parse = nftnl_expr_dup_parse,
155 .build = nftnl_expr_dup_build,
156 .snprintf = nftnl_expr_dup_snprintf,