16 #include <arpa/inet.h>
17 #include <libmnl/libmnl.h>
18 #include <linux/netfilter/nf_tables.h>
19 #include <libnftnl/rule.h>
20 #include <libnftnl/expr.h>
26 enum nft_registers sreg_key;
27 enum nft_registers sreg_data;
28 enum nft_dynset_ops op;
30 struct nftnl_expr *expr;
36 nftnl_expr_dynset_set(
struct nftnl_expr *e, uint16_t type,
37 const void *data, uint32_t data_len)
42 case NFTNL_EXPR_DYNSET_SREG_KEY:
43 memcpy(&dynset->sreg_key, data,
sizeof(dynset->sreg_key));
45 case NFTNL_EXPR_DYNSET_SREG_DATA:
46 memcpy(&dynset->sreg_data, data,
sizeof(dynset->sreg_data));
48 case NFTNL_EXPR_DYNSET_OP:
49 memcpy(&dynset->op, data,
sizeof(dynset->op));
51 case NFTNL_EXPR_DYNSET_TIMEOUT:
52 memcpy(&dynset->timeout, data,
sizeof(dynset->timeout));
54 case NFTNL_EXPR_DYNSET_SET_NAME:
55 dynset->set_name = strdup((
const char *)data);
56 if (!dynset->set_name)
59 case NFTNL_EXPR_DYNSET_SET_ID:
60 memcpy(&dynset->set_id, data,
sizeof(dynset->set_id));
62 case NFTNL_EXPR_DYNSET_EXPR:
63 dynset->expr = (
void *)data;
72 nftnl_expr_dynset_get(
const struct nftnl_expr *e, uint16_t type,
78 case NFTNL_EXPR_DYNSET_SREG_KEY:
79 *data_len =
sizeof(dynset->sreg_key);
80 return &dynset->sreg_key;
81 case NFTNL_EXPR_DYNSET_SREG_DATA:
82 *data_len =
sizeof(dynset->sreg_data);
83 return &dynset->sreg_data;
84 case NFTNL_EXPR_DYNSET_OP:
85 *data_len =
sizeof(dynset->op);
87 case NFTNL_EXPR_DYNSET_TIMEOUT:
88 *data_len =
sizeof(dynset->timeout);
89 return &dynset->timeout;
90 case NFTNL_EXPR_DYNSET_SET_NAME:
91 *data_len = strlen(dynset->set_name) + 1;
92 return dynset->set_name;
93 case NFTNL_EXPR_DYNSET_SET_ID:
94 *data_len =
sizeof(dynset->set_id);
95 return &dynset->set_id;
96 case NFTNL_EXPR_DYNSET_EXPR:
102 static int nftnl_expr_dynset_cb(
const struct nlattr *attr,
void *data)
104 const struct nlattr **tb = data;
105 int type = mnl_attr_get_type(attr);
107 if (mnl_attr_type_valid(attr, NFTA_SET_MAX) < 0)
111 case NFTA_DYNSET_SREG_KEY:
112 case NFTA_DYNSET_SREG_DATA:
113 case NFTA_DYNSET_SET_ID:
115 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
118 case NFTA_DYNSET_TIMEOUT:
119 if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0)
122 case NFTA_DYNSET_SET_NAME:
123 if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0)
126 case NFTA_DYNSET_EXPR:
127 if (mnl_attr_validate(attr, MNL_TYPE_NESTED) < 0)
137 nftnl_expr_dynset_build(
struct nlmsghdr *nlh,
const struct nftnl_expr *e)
142 if (e->flags & (1 << NFTNL_EXPR_DYNSET_SREG_KEY))
143 mnl_attr_put_u32(nlh, NFTA_DYNSET_SREG_KEY, htonl(dynset->sreg_key));
144 if (e->flags & (1 << NFTNL_EXPR_DYNSET_SREG_DATA))
145 mnl_attr_put_u32(nlh, NFTA_DYNSET_SREG_DATA, htonl(dynset->sreg_data));
146 if (e->flags & (1 << NFTNL_EXPR_DYNSET_OP))
147 mnl_attr_put_u32(nlh, NFTA_DYNSET_OP, htonl(dynset->op));
148 if (e->flags & (1 << NFTNL_EXPR_DYNSET_TIMEOUT))
149 mnl_attr_put_u64(nlh, NFTA_DYNSET_TIMEOUT, htobe64(dynset->timeout));
150 if (e->flags & (1 << NFTNL_EXPR_DYNSET_SET_NAME))
151 mnl_attr_put_strz(nlh, NFTA_DYNSET_SET_NAME, dynset->set_name);
152 if (e->flags & (1 << NFTNL_EXPR_DYNSET_SET_ID))
153 mnl_attr_put_u32(nlh, NFTA_DYNSET_SET_ID, htonl(dynset->set_id));
154 if (e->flags & (1 << NFTNL_EXPR_DYNSET_EXPR)) {
155 nest = mnl_attr_nest_start(nlh, NFTA_DYNSET_EXPR);
156 nftnl_expr_build_payload(nlh, dynset->expr);
157 mnl_attr_nest_end(nlh, nest);
162 nftnl_expr_dynset_parse(
struct nftnl_expr *e,
struct nlattr *attr)
165 struct nlattr *tb[NFTA_SET_MAX+1] = {};
168 if (mnl_attr_parse_nested(attr, nftnl_expr_dynset_cb, tb) < 0)
171 if (tb[NFTA_DYNSET_SREG_KEY]) {
172 dynset->sreg_key = ntohl(mnl_attr_get_u32(tb[NFTA_DYNSET_SREG_KEY]));
173 e->flags |= (1 << NFTNL_EXPR_DYNSET_SREG_KEY);
175 if (tb[NFTA_DYNSET_SREG_DATA]) {
176 dynset->sreg_data = ntohl(mnl_attr_get_u32(tb[NFTA_DYNSET_SREG_DATA]));
177 e->flags |= (1 << NFTNL_EXPR_DYNSET_SREG_DATA);
179 if (tb[NFTA_DYNSET_OP]) {
180 dynset->op = ntohl(mnl_attr_get_u32(tb[NFTA_DYNSET_OP]));
181 e->flags |= (1 << NFTNL_EXPR_DYNSET_OP);
183 if (tb[NFTA_DYNSET_TIMEOUT]) {
184 dynset->timeout = be64toh(mnl_attr_get_u64(tb[NFTA_DYNSET_TIMEOUT]));
185 e->flags |= (1 << NFTNL_EXPR_DYNSET_TIMEOUT);
187 if (tb[NFTA_DYNSET_SET_NAME]) {
189 strdup(mnl_attr_get_str(tb[NFTA_DYNSET_SET_NAME]));
190 if (!dynset->set_name)
192 e->flags |= (1 << NFTNL_EXPR_DYNSET_SET_NAME);
194 if (tb[NFTA_DYNSET_SET_ID]) {
195 dynset->set_id = ntohl(mnl_attr_get_u32(tb[NFTA_DYNSET_SET_ID]));
196 e->flags |= (1 << NFTNL_EXPR_DYNSET_SET_ID);
198 if (tb[NFTA_DYNSET_EXPR]) {
199 e->flags |= (1 << NFTNL_EXPR_DYNSET_EXPR);
200 dynset->expr = nftnl_expr_parse(tb[NFTA_DYNSET_EXPR]);
201 if (dynset->expr == NULL)
208 static const char *op2str_array[] = {
209 [NFT_DYNSET_OP_ADD] =
"add",
210 [NFT_DYNSET_OP_UPDATE] =
"update",
213 static const char *op2str(
enum nft_dynset_ops op)
215 if (op > NFT_DYNSET_OP_UPDATE)
217 return op2str_array[op];
221 nftnl_expr_dynset_snprintf_default(
char *buf,
size_t size,
222 const struct nftnl_expr *e)
225 struct nftnl_expr *expr;
226 int remain = size, offset = 0, ret;
228 ret = snprintf(buf, remain,
"%s reg_key %u set %s ",
229 op2str(dynset->op), dynset->sreg_key, dynset->set_name);
230 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
232 if (e->flags & (1 << NFTNL_EXPR_DYNSET_SREG_DATA)) {
233 ret = snprintf(buf + offset, remain,
"sreg_data %u ",
235 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
237 if (e->flags & (1 << NFTNL_EXPR_DYNSET_TIMEOUT)) {
238 ret = snprintf(buf + offset, remain,
"timeout %"PRIu64
"ms ",
240 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
242 if (e->flags & (1 << NFTNL_EXPR_DYNSET_EXPR)) {
244 ret = snprintf(buf + offset, remain,
"expr [ %s ",
246 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
248 ret = nftnl_expr_snprintf(buf + offset, remain, expr,
249 NFTNL_OUTPUT_DEFAULT,
251 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
253 ret = snprintf(buf + offset, remain,
"] ");
254 SNPRINTF_BUFFER_SIZE(ret, remain, offset);
261 nftnl_expr_dynset_snprintf(
char *buf,
size_t size, uint32_t type,
262 uint32_t flags,
const struct nftnl_expr *e)
265 case NFTNL_OUTPUT_DEFAULT:
266 return nftnl_expr_dynset_snprintf_default(buf, size, e);
267 case NFTNL_OUTPUT_XML:
268 case NFTNL_OUTPUT_JSON:
275 static void nftnl_expr_dynset_free(
const struct nftnl_expr *e)
279 xfree(dynset->set_name);
282 struct expr_ops expr_ops_dynset = {
285 .max_attr = NFTA_DYNSET_MAX,
286 .free = nftnl_expr_dynset_free,
287 .set = nftnl_expr_dynset_set,
288 .get = nftnl_expr_dynset_get,
289 .parse = nftnl_expr_dynset_parse,
290 .build = nftnl_expr_dynset_build,
291 .snprintf = nftnl_expr_dynset_snprintf,