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 dynset->sreg_key = *((uint32_t *)data);
45 case NFTNL_EXPR_DYNSET_SREG_DATA:
46 dynset->sreg_data = *((uint32_t *)data);
48 case NFTNL_EXPR_DYNSET_OP:
49 dynset->op = *((uint32_t *)data);
51 case NFTNL_EXPR_DYNSET_TIMEOUT:
52 dynset->timeout = *((uint64_t *)data);
54 case NFTNL_EXPR_DYNSET_SET_NAME:
55 dynset->set_name = strdup((
const char *)data);
57 case NFTNL_EXPR_DYNSET_SET_ID:
58 dynset->set_id = *((uint32_t *)data);
60 case NFTNL_EXPR_DYNSET_EXPR:
61 dynset->expr = (
void *)data;
70 nftnl_expr_dynset_get(
const struct nftnl_expr *e, uint16_t type,
76 case NFTNL_EXPR_DYNSET_SREG_KEY:
77 *data_len =
sizeof(dynset->sreg_key);
78 return &dynset->sreg_key;
79 case NFTNL_EXPR_DYNSET_SREG_DATA:
80 *data_len =
sizeof(dynset->sreg_data);
81 return &dynset->sreg_data;
82 case NFTNL_EXPR_DYNSET_OP:
83 *data_len =
sizeof(dynset->op);
85 case NFTNL_EXPR_DYNSET_TIMEOUT:
86 *data_len =
sizeof(dynset->timeout);
87 return &dynset->timeout;
88 case NFTNL_EXPR_DYNSET_SET_NAME:
89 return dynset->set_name;
90 case NFTNL_EXPR_DYNSET_SET_ID:
91 return &dynset->set_id;
92 case NFTNL_EXPR_DYNSET_EXPR:
98 static int nftnl_expr_dynset_cb(
const struct nlattr *attr,
void *data)
100 const struct nlattr **tb = data;
101 int type = mnl_attr_get_type(attr);
103 if (mnl_attr_type_valid(attr, NFTA_SET_MAX) < 0)
107 case NFTA_DYNSET_SREG_KEY:
108 case NFTA_DYNSET_SREG_DATA:
109 case NFTA_DYNSET_SET_ID:
111 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
114 case NFTA_DYNSET_TIMEOUT:
115 if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0)
118 case NFTA_DYNSET_SET_NAME:
119 if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0)
122 case NFTA_DYNSET_EXPR:
123 if (mnl_attr_validate(attr, MNL_TYPE_NESTED) < 0)
133 nftnl_expr_dynset_build(
struct nlmsghdr *nlh,
const struct nftnl_expr *e)
138 if (e->flags & (1 << NFTNL_EXPR_DYNSET_SREG_KEY))
139 mnl_attr_put_u32(nlh, NFTA_DYNSET_SREG_KEY, htonl(dynset->sreg_key));
140 if (e->flags & (1 << NFTNL_EXPR_DYNSET_SREG_DATA))
141 mnl_attr_put_u32(nlh, NFTA_DYNSET_SREG_DATA, htonl(dynset->sreg_data));
142 if (e->flags & (1 << NFTNL_EXPR_DYNSET_OP))
143 mnl_attr_put_u32(nlh, NFTA_DYNSET_OP, htonl(dynset->op));
144 if (e->flags & (1 << NFTNL_EXPR_DYNSET_TIMEOUT))
145 mnl_attr_put_u64(nlh, NFTA_DYNSET_TIMEOUT, htobe64(dynset->timeout));
146 if (e->flags & (1 << NFTNL_EXPR_DYNSET_SET_NAME))
147 mnl_attr_put_strz(nlh, NFTA_DYNSET_SET_NAME, dynset->set_name);
148 if (e->flags & (1 << NFTNL_EXPR_DYNSET_SET_ID))
149 mnl_attr_put_u32(nlh, NFTA_DYNSET_SET_ID, htonl(dynset->set_id));
150 if (e->flags & (1 << NFTNL_EXPR_DYNSET_EXPR)) {
151 nest = mnl_attr_nest_start(nlh, NFTA_DYNSET_EXPR);
152 nftnl_expr_build_payload(nlh, dynset->expr);
153 mnl_attr_nest_end(nlh, nest);
158 nftnl_expr_dynset_parse(
struct nftnl_expr *e,
struct nlattr *attr)
161 struct nlattr *tb[NFTA_SET_MAX+1] = {};
164 if (mnl_attr_parse_nested(attr, nftnl_expr_dynset_cb, tb) < 0)
167 if (tb[NFTA_DYNSET_SREG_KEY]) {
168 dynset->sreg_key = ntohl(mnl_attr_get_u32(tb[NFTA_DYNSET_SREG_KEY]));
169 e->flags |= (1 << NFTNL_EXPR_DYNSET_SREG_KEY);
171 if (tb[NFTA_DYNSET_SREG_DATA]) {
172 dynset->sreg_data = ntohl(mnl_attr_get_u32(tb[NFTA_DYNSET_SREG_DATA]));
173 e->flags |= (1 << NFTNL_EXPR_DYNSET_SREG_DATA);
175 if (tb[NFTA_DYNSET_OP]) {
176 dynset->op = ntohl(mnl_attr_get_u32(tb[NFTA_DYNSET_OP]));
177 e->flags |= (1 << NFTNL_EXPR_DYNSET_OP);
179 if (tb[NFTA_DYNSET_TIMEOUT]) {
180 dynset->timeout = be64toh(mnl_attr_get_u64(tb[NFTA_DYNSET_TIMEOUT]));
181 e->flags |= (1 << NFTNL_EXPR_DYNSET_TIMEOUT);
183 if (tb[NFTA_DYNSET_SET_NAME]) {
185 strdup(mnl_attr_get_str(tb[NFTA_DYNSET_SET_NAME]));
186 e->flags |= (1 << NFTNL_EXPR_DYNSET_SET_NAME);
188 if (tb[NFTA_DYNSET_SET_ID]) {
189 dynset->set_id = ntohl(mnl_attr_get_u32(tb[NFTA_DYNSET_SET_ID]));
190 e->flags |= (1 << NFTNL_EXPR_DYNSET_SET_ID);
192 if (tb[NFTA_DYNSET_EXPR]) {
193 e->flags |= (1 << NFTNL_EXPR_DYNSET_EXPR);
194 dynset->expr = nftnl_expr_parse(tb[NFTA_DYNSET_EXPR]);
195 if (dynset->expr == NULL)
203 nftnl_expr_dynset_json_parse(
struct nftnl_expr *e, json_t *root,
204 struct nftnl_parse_err *err)
207 const char *set_name;
211 set_name = nftnl_jansson_parse_str(root,
"set", err);
212 if (set_name != NULL)
213 nftnl_expr_set_str(e, NFTNL_EXPR_DYNSET_SET_NAME, set_name);
215 if (nftnl_jansson_parse_reg(root,
"sreg_key",
216 NFTNL_TYPE_U32, &uval32, err) == 0)
217 nftnl_expr_set_u32(e, NFTNL_EXPR_DYNSET_SREG_KEY, uval32);
219 if (nftnl_jansson_parse_reg(root,
"sreg_data",
220 NFTNL_TYPE_U32, &uval32, err) == 0)
221 nftnl_expr_set_u32(e, NFTNL_EXPR_DYNSET_SREG_DATA, uval32);
223 if (nftnl_jansson_parse_val(root,
"op", NFTNL_TYPE_U32, &uval32,
225 nftnl_expr_set_u32(e, NFTNL_EXPR_DYNSET_OP, uval32);
227 if (nftnl_jansson_parse_val(root,
"timeout", NFTNL_TYPE_U64, &uval64,
229 nftnl_expr_set_u64(e, NFTNL_EXPR_DYNSET_TIMEOUT, uval64);
239 nftnl_expr_dynset_xml_parse(
struct nftnl_expr *e, mxml_node_t *tree,
240 struct nftnl_parse_err *err)
243 const char *set_name;
247 set_name = nftnl_mxml_str_parse(tree,
"set", MXML_DESCEND_FIRST,
248 NFTNL_XML_MAND, err);
249 if (set_name != NULL)
250 nftnl_expr_set_str(e, NFTNL_EXPR_DYNSET_SET_NAME, set_name);
252 if (nftnl_mxml_reg_parse(tree,
"sreg_key", &uval32, MXML_DESCEND,
253 NFTNL_XML_MAND, err) == 0)
254 nftnl_expr_set_u32(e, NFTNL_EXPR_DYNSET_SREG_KEY, uval32);
256 if (nftnl_mxml_reg_parse(tree,
"sreg_data", &uval32, MXML_DESCEND,
257 NFTNL_XML_MAND, err) == 0)
258 nftnl_expr_set_u32(e, NFTNL_EXPR_DYNSET_SREG_DATA, uval32);
260 if (nftnl_mxml_num_parse(tree,
"op", MXML_DESCEND_FIRST, BASE_DEC,
261 &uval32, NFTNL_TYPE_U32, NFTNL_XML_MAND, err) == 0)
262 nftnl_expr_set_u32(e, NFTNL_EXPR_DYNSET_OP, uval32);
264 if (nftnl_mxml_num_parse(tree,
"timeout", MXML_DESCEND_FIRST, BASE_DEC,
265 &uval64, NFTNL_TYPE_U64, NFTNL_XML_MAND, err) == 0)
266 nftnl_expr_set_u64(e, NFTNL_EXPR_DYNSET_TIMEOUT, uval64);
276 nftnl_expr_dynset_export(
char *buf,
size_t size,
277 const struct nftnl_expr *e,
int type)
280 NFTNL_BUF_INIT(b, buf, size);
282 if (e->flags & (1 << NFTNL_EXPR_DYNSET_SET_NAME))
283 nftnl_buf_str(&b, type, dynset->set_name, SET_NAME);
284 if (e->flags & (1 << NFTNL_EXPR_DYNSET_SREG_KEY))
285 nftnl_buf_u32(&b, type, dynset->sreg_key, SREG_KEY);
286 if (e->flags & (1 << NFTNL_EXPR_DYNSET_SREG_DATA))
287 nftnl_buf_u32(&b, type, dynset->sreg_data, SREG_DATA);
289 return nftnl_buf_done(&b);
292 static char *op2str_array[] = {
293 [NFT_DYNSET_OP_ADD] =
"add",
294 [NFT_DYNSET_OP_UPDATE] =
"update",
297 static const char *op2str(
enum nft_dynset_ops op)
299 if (op > NFT_DYNSET_OP_UPDATE)
301 return op2str_array[op];
305 nftnl_expr_dynset_snprintf_default(
char *buf,
size_t size,
306 const struct nftnl_expr *e)
309 struct nftnl_expr *expr;
310 int len = size, offset = 0, ret;
312 ret = snprintf(buf, len,
"%s reg_key %u set %s ",
313 op2str(dynset->op), dynset->sreg_key, dynset->set_name);
314 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
316 if (e->flags & (1 << NFTNL_EXPR_DYNSET_SREG_DATA)) {
317 ret = snprintf(buf+offset, len,
"sreg_data %u ", dynset->sreg_data);
318 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
320 if (e->flags & (1 << NFTNL_EXPR_DYNSET_TIMEOUT)) {
321 ret = snprintf(buf+offset, len,
"timeout %"PRIu64
"ms ",
323 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
325 if (e->flags & (1 << NFTNL_EXPR_DYNSET_EXPR)) {
327 ret = snprintf(buf+offset, len,
"expr [ %s ",
329 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
331 ret = nftnl_expr_snprintf(buf+offset, len, expr,
332 NFTNL_OUTPUT_DEFAULT,
334 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
336 ret = snprintf(buf+offset, len,
"] ");
337 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
344 nftnl_expr_dynset_snprintf(
char *buf,
size_t size, uint32_t type,
345 uint32_t flags,
const struct nftnl_expr *e)
349 case NFTNL_OUTPUT_DEFAULT:
350 return nftnl_expr_dynset_snprintf_default(buf, size, e);
351 case NFTNL_OUTPUT_XML:
352 case NFTNL_OUTPUT_JSON:
353 return nftnl_expr_dynset_export(buf, size, e, type);
360 static void nftnl_expr_dynset_free(
const struct nftnl_expr *e)
364 xfree(dynset->set_name);
367 struct expr_ops expr_ops_dynset = {
370 .max_attr = NFTA_DYNSET_MAX,
371 .free = nftnl_expr_dynset_free,
372 .set = nftnl_expr_dynset_set,
373 .get = nftnl_expr_dynset_get,
374 .parse = nftnl_expr_dynset_parse,
375 .build = nftnl_expr_dynset_build,
376 .snprintf = nftnl_expr_dynset_snprintf,
377 .xml_parse = nftnl_expr_dynset_xml_parse,
378 .json_parse = nftnl_expr_dynset_json_parse,