12 #include <arpa/inet.h>
14 #include <netinet/in.h>
16 #include <libmnl/libmnl.h>
17 #include <linux/netfilter.h>
18 #include <linux/netfilter/nf_tables.h>
19 #include <libnftnl/expr.h>
20 #include <libnftnl/rule.h>
24 nftnl_data_reg_value_snprintf_default(
char *buf,
size_t remain,
25 const union nftnl_data_reg *reg,
28 const char *pfx = flags & DATA_F_NOPFX ?
"" :
"0x";
29 int offset = 0, ret, i;
33 for (i = 0; i < div_round_up(reg->len,
sizeof(uint32_t)); i++) {
34 ret = snprintf(buf + offset, remain,
35 "%s%.8x ", pfx, 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 flags,
int reg_type)
66 return nftnl_data_reg_value_snprintf_default(buf, size,
70 return nftnl_data_reg_verdict_snprintf_def(buf, size,
77 static int nftnl_data_parse_cb(
const struct nlattr *attr,
void *data)
79 const struct nlattr **tb = data;
80 int type = mnl_attr_get_type(attr);
82 if (mnl_attr_type_valid(attr, NFTA_DATA_MAX) < 0)
87 if (mnl_attr_validate(attr, MNL_TYPE_BINARY) < 0)
90 case NFTA_DATA_VERDICT:
91 if (mnl_attr_validate(attr, MNL_TYPE_NESTED) < 0)
99 static int nftnl_verdict_parse_cb(
const struct nlattr *attr,
void *data)
101 const struct nlattr **tb = data;
102 int type = mnl_attr_get_type(attr);
104 if (mnl_attr_type_valid(attr, NFTA_VERDICT_MAX) < 0)
108 case NFTA_VERDICT_CODE:
109 case NFTA_VERDICT_CHAIN_ID:
110 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
113 case NFTA_VERDICT_CHAIN:
114 if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0)
123 nftnl_parse_verdict(
union nftnl_data_reg *data,
const struct nlattr *attr,
int *type)
125 struct nlattr *tb[NFTA_VERDICT_MAX+1];
127 if (mnl_attr_parse_nested(attr, nftnl_verdict_parse_cb, tb) < 0)
130 if (!tb[NFTA_VERDICT_CODE])
133 data->verdict = ntohl(mnl_attr_get_u32(tb[NFTA_VERDICT_CODE]));
135 switch(data->verdict) {
143 *type = DATA_VERDICT;
144 data->len =
sizeof(data->verdict);
148 if (!tb[NFTA_VERDICT_CHAIN])
151 data->chain = strdup(mnl_attr_get_str(tb[NFTA_VERDICT_CHAIN]));
166 __nftnl_parse_data(
union nftnl_data_reg *data,
const struct nlattr *attr)
168 void *orig = mnl_attr_get_payload(attr);
169 uint32_t data_len = mnl_attr_get_payload_len(attr);
174 if (data_len >
sizeof(data->val))
177 memcpy(data->val, orig, data_len);
178 data->len = data_len;
183 int nftnl_parse_data(
union nftnl_data_reg *data,
struct nlattr *attr,
int *type)
185 struct nlattr *tb[NFTA_DATA_MAX+1] = {};
188 if (mnl_attr_parse_nested(attr, nftnl_data_parse_cb, tb) < 0)
191 if (tb[NFTA_DATA_VALUE]) {
195 ret = __nftnl_parse_data(data, tb[NFTA_DATA_VALUE]);
199 if (tb[NFTA_DATA_VERDICT])
200 ret = nftnl_parse_verdict(data, tb[NFTA_DATA_VERDICT], type);
205 int nftnl_data_cpy(
union nftnl_data_reg *dreg,
const void *src, uint32_t len)
209 if (len >
sizeof(dreg->val)) {
210 len =
sizeof(dreg->val);
214 memcpy(dreg->val, src, len);