18#include <netinet/in.h>
20#include <libmnl/libmnl.h>
21#include <linux/netfilter.h>
22#include <linux/netfilter/nf_tables.h>
23#include <libnftnl/expr.h>
24#include <libnftnl/rule.h>
28nftnl_data_reg_value_snprintf_default(
char *buf,
size_t remain,
29 const union nftnl_data_reg *reg,
32 const char *pfx = flags & DATA_F_NOPFX ?
"" :
"0x";
33 int offset = 0, ret, i;
37 for (i = 0; i < div_round_up(reg->len,
sizeof(uint32_t)); i++) {
38 ret = snprintf(buf + offset, remain,
39 "%s%.8x ", pfx, reg->val[i]);
40 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
47nftnl_data_reg_verdict_snprintf_def(
char *buf,
size_t size,
48 const union nftnl_data_reg *reg,
51 int remain = size, offset = 0, ret = 0;
53 ret = snprintf(buf, size,
"%s ", nftnl_verdict2str(reg->verdict));
54 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
56 if (reg->chain != NULL) {
57 ret = snprintf(buf + offset, remain,
"-> %s ", reg->chain);
58 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
64int nftnl_data_reg_snprintf(
char *buf,
size_t size,
65 const union nftnl_data_reg *reg,
66 uint32_t flags,
int reg_type)
70 return nftnl_data_reg_value_snprintf_default(buf, size,
74 return nftnl_data_reg_verdict_snprintf_def(buf, size,
81static int nftnl_data_parse_cb(
const struct nlattr *attr,
void *data)
83 const struct nlattr **tb = data;
84 int type = mnl_attr_get_type(attr);
86 if (mnl_attr_type_valid(attr, NFTA_DATA_MAX) < 0)
91 if (mnl_attr_validate(attr, MNL_TYPE_BINARY) < 0)
94 case NFTA_DATA_VERDICT:
95 if (mnl_attr_validate(attr, MNL_TYPE_NESTED) < 0)
103static int nftnl_verdict_parse_cb(
const struct nlattr *attr,
void *data)
105 const struct nlattr **tb = data;
106 int type = mnl_attr_get_type(attr);
108 if (mnl_attr_type_valid(attr, NFTA_VERDICT_MAX) < 0)
112 case NFTA_VERDICT_CODE:
113 case NFTA_VERDICT_CHAIN_ID:
114 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
117 case NFTA_VERDICT_CHAIN:
118 if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0)
127nftnl_parse_verdict(
union nftnl_data_reg *data,
const struct nlattr *attr,
int *type)
129 struct nlattr *tb[NFTA_VERDICT_MAX+1];
131 if (mnl_attr_parse_nested(attr, nftnl_verdict_parse_cb, tb) < 0)
134 if (!tb[NFTA_VERDICT_CODE])
137 data->verdict = ntohl(mnl_attr_get_u32(tb[NFTA_VERDICT_CODE]));
139 switch(data->verdict) {
147 *type = DATA_VERDICT;
148 data->len =
sizeof(data->verdict);
152 if (!tb[NFTA_VERDICT_CHAIN])
155 data->chain = strdup(mnl_attr_get_str(tb[NFTA_VERDICT_CHAIN]));
170__nftnl_parse_data(
union nftnl_data_reg *data,
const struct nlattr *attr)
172 void *orig = mnl_attr_get_payload(attr);
173 uint32_t data_len = mnl_attr_get_payload_len(attr);
178 if (data_len >
sizeof(data->val))
181 memcpy(data->val, orig, data_len);
182 data->len = data_len;
187int nftnl_parse_data(
union nftnl_data_reg *data,
struct nlattr *attr,
int *type)
189 struct nlattr *tb[NFTA_DATA_MAX+1] = {};
192 if (mnl_attr_parse_nested(attr, nftnl_data_parse_cb, tb) < 0)
195 if (tb[NFTA_DATA_VALUE]) {
199 ret = __nftnl_parse_data(data, tb[NFTA_DATA_VALUE]);
203 if (tb[NFTA_DATA_VERDICT])
204 ret = nftnl_parse_verdict(data, tb[NFTA_DATA_VERDICT], type);
209void nftnl_free_verdict(
const union nftnl_data_reg *data)
211 switch(data->verdict) {