16 #include <arpa/inet.h>
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>
28 nftnl_data_reg_value_snprintf_default(
char *buf,
size_t size,
29 const union nftnl_data_reg *reg,
32 int remain = size, offset = 0, ret, i;
34 for (i = 0; i < div_round_up(reg->len,
sizeof(uint32_t)); i++) {
35 ret = snprintf(buf + offset, remain,
"0x%.8x ", reg->val[i]);
36 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
43 nftnl_data_reg_verdict_snprintf_def(
char *buf,
size_t size,
44 const union nftnl_data_reg *reg,
47 int remain = size, offset = 0, ret = 0;
49 ret = snprintf(buf, size,
"%s ", nftnl_verdict2str(reg->verdict));
50 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
52 if (reg->chain != NULL) {
53 ret = snprintf(buf + offset, remain,
"-> %s ", reg->chain);
54 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
60 int nftnl_data_reg_snprintf(
char *buf,
size_t size,
61 const union nftnl_data_reg *reg,
62 uint32_t output_format, uint32_t flags,
67 switch(output_format) {
68 case NFTNL_OUTPUT_DEFAULT:
69 return nftnl_data_reg_value_snprintf_default(buf, size,
71 case NFTNL_OUTPUT_JSON:
72 case NFTNL_OUTPUT_XML:
79 switch(output_format) {
80 case NFTNL_OUTPUT_DEFAULT:
81 return nftnl_data_reg_verdict_snprintf_def(buf, size,
83 case NFTNL_OUTPUT_JSON:
84 case NFTNL_OUTPUT_XML:
96 static int nftnl_data_parse_cb(
const struct nlattr *attr,
void *data)
98 const struct nlattr **tb = data;
99 int type = mnl_attr_get_type(attr);
101 if (mnl_attr_type_valid(attr, NFTA_DATA_MAX) < 0)
105 case NFTA_DATA_VALUE:
106 if (mnl_attr_validate(attr, MNL_TYPE_BINARY) < 0)
109 case NFTA_DATA_VERDICT:
110 if (mnl_attr_validate(attr, MNL_TYPE_NESTED) < 0)
118 static int nftnl_verdict_parse_cb(
const struct nlattr *attr,
void *data)
120 const struct nlattr **tb = data;
121 int type = mnl_attr_get_type(attr);
123 if (mnl_attr_type_valid(attr, NFTA_VERDICT_MAX) < 0)
127 case NFTA_VERDICT_CODE:
128 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
131 case NFTA_VERDICT_CHAIN:
132 if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0)
141 nftnl_parse_verdict(
union nftnl_data_reg *data,
const struct nlattr *attr,
int *type)
143 struct nlattr *tb[NFTA_VERDICT_MAX+1];
145 if (mnl_attr_parse_nested(attr, nftnl_verdict_parse_cb, tb) < 0)
148 if (!tb[NFTA_VERDICT_CODE])
151 data->verdict = ntohl(mnl_attr_get_u32(tb[NFTA_VERDICT_CODE]));
153 switch(data->verdict) {
161 *type = DATA_VERDICT;
162 data->len =
sizeof(data->verdict);
166 if (!tb[NFTA_VERDICT_CHAIN])
169 data->chain = strdup(mnl_attr_get_str(tb[NFTA_VERDICT_CHAIN]));
184 __nftnl_parse_data(
union nftnl_data_reg *data,
const struct nlattr *attr)
186 void *orig = mnl_attr_get_payload(attr);
187 uint32_t data_len = mnl_attr_get_payload_len(attr);
192 if (data_len >
sizeof(data->val))
195 memcpy(data->val, orig, data_len);
196 data->len = data_len;
201 int nftnl_parse_data(
union nftnl_data_reg *data,
struct nlattr *attr,
int *type)
203 struct nlattr *tb[NFTA_DATA_MAX+1] = {};
206 if (mnl_attr_parse_nested(attr, nftnl_data_parse_cb, tb) < 0)
209 if (tb[NFTA_DATA_VALUE]) {
213 ret = __nftnl_parse_data(data, tb[NFTA_DATA_VALUE]);
217 if (tb[NFTA_DATA_VERDICT])
218 ret = nftnl_parse_verdict(data, tb[NFTA_DATA_VERDICT], type);
223 void nftnl_free_verdict(
const union nftnl_data_reg *data)
225 switch(data->verdict) {