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_dev;
28 static int nftnl_expr_fwd_set(
struct nftnl_expr *e, uint16_t type,
29 const void *data, uint32_t data_len)
34 case NFTNL_EXPR_FWD_SREG_DEV:
35 fwd->sreg_dev= *((uint32_t *)data);
43 static const void *nftnl_expr_fwd_get(
const struct nftnl_expr *e,
44 uint16_t type, uint32_t *data_len)
49 case NFTNL_EXPR_FWD_SREG_DEV:
50 *data_len =
sizeof(fwd->sreg_dev);
51 return &fwd->sreg_dev;
56 static int nftnl_expr_fwd_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_FWD_MAX) < 0)
65 case NFTA_FWD_SREG_DEV:
66 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
75 static void nftnl_expr_fwd_build(
struct nlmsghdr *nlh,
76 const struct nftnl_expr *e)
80 if (e->flags & (1 << NFTNL_EXPR_FWD_SREG_DEV))
81 mnl_attr_put_u32(nlh, NFTA_FWD_SREG_DEV, htonl(fwd->sreg_dev));
84 static int nftnl_expr_fwd_parse(
struct nftnl_expr *e,
struct nlattr *attr)
87 struct nlattr *tb[NFTA_FWD_MAX + 1] = {};
90 if (mnl_attr_parse_nested(attr, nftnl_expr_fwd_cb, tb) < 0)
93 if (tb[NFTA_FWD_SREG_DEV]) {
94 fwd->sreg_dev = ntohl(mnl_attr_get_u32(tb[NFTA_FWD_SREG_DEV]));
95 e->flags |= (1 << NFTNL_EXPR_FWD_SREG_DEV);
101 static int nftnl_expr_fwd_json_parse(
struct nftnl_expr *e, json_t *root,
102 struct nftnl_parse_err *err)
108 ret = nftnl_jansson_parse_val(root,
"sreg_dev", NFTNL_TYPE_U32, &sreg_dev, err);
110 nftnl_expr_set_u32(e, NFTNL_EXPR_FWD_SREG_DEV, sreg_dev);
119 static int nftnl_expr_fwd_export(
char *buf,
size_t size,
120 const struct nftnl_expr *e,
int type)
123 NFTNL_BUF_INIT(b, buf, size);
125 if (e->flags & (1 << NFTNL_EXPR_FWD_SREG_DEV))
126 nftnl_buf_u32(&b, type, fwd->sreg_dev,
"sreg_dev");
128 return nftnl_buf_done(&b);
131 static int nftnl_expr_fwd_snprintf_default(
char *buf,
size_t len,
132 const struct nftnl_expr *e,
135 int remain = len, offset = 0, ret;
138 if (e->flags & (1 << NFTNL_EXPR_FWD_SREG_DEV)) {
139 ret = snprintf(buf + offset, remain,
"sreg_dev %u ",
141 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
147 static int nftnl_expr_fwd_snprintf(
char *buf,
size_t len, uint32_t type,
148 uint32_t flags,
const struct nftnl_expr *e)
151 case NFTNL_OUTPUT_DEFAULT:
152 return nftnl_expr_fwd_snprintf_default(buf, len, e, flags);
153 case NFTNL_OUTPUT_XML:
154 case NFTNL_OUTPUT_JSON:
155 return nftnl_expr_fwd_export(buf, len, e, type);
162 static bool nftnl_expr_fwd_cmp(
const struct nftnl_expr *e1,
163 const struct nftnl_expr *e2)
169 if (e1->flags & (1 << NFTNL_EXPR_FWD_SREG_DEV))
170 eq &= (f1->sreg_dev == f2->sreg_dev);
175 struct expr_ops expr_ops_fwd = {
178 .max_attr = NFTA_FWD_MAX,
179 .cmp = nftnl_expr_fwd_cmp,
180 .set = nftnl_expr_fwd_set,
181 .get = nftnl_expr_fwd_get,
182 .parse = nftnl_expr_fwd_parse,
183 .build = nftnl_expr_fwd_build,
184 .snprintf = nftnl_expr_fwd_snprintf,
185 .json_parse = nftnl_expr_fwd_json_parse,