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 static int nftnl_data_reg_verdict_json_parse(
union nftnl_data_reg *reg, json_t *data,
29 struct nftnl_parse_err *err)
32 const char *verdict_str;
35 verdict_str = nftnl_jansson_parse_str(data,
"verdict", err);
36 if (verdict_str == NULL)
39 if (nftnl_str2verdict(verdict_str, &verdict) != 0) {
40 err->node_name =
"verdict";
41 err->error = NFTNL_PARSE_EBADTYPE;
46 reg->verdict = (uint32_t)verdict;
48 if (nftnl_jansson_node_exist(data,
"chain")) {
49 chain = nftnl_jansson_parse_str(data,
"chain", err);
53 reg->chain = strdup(chain);
59 static int nftnl_data_reg_value_json_parse(
union nftnl_data_reg *reg, json_t *data,
60 struct nftnl_parse_err *err)
65 if (nftnl_jansson_parse_val(data,
"len", NFTNL_TYPE_U8, ®->len, err) < 0)
68 for (i = 0; i < div_round_up(reg->len,
sizeof(uint32_t)); i++) {
69 sprintf(node_name,
"data%d", i);
71 if (nftnl_jansson_str2num(data, node_name, BASE_HEX,
72 ®->val[i], NFTNL_TYPE_U32, err) != 0)
79 int nftnl_data_reg_json_parse(
union nftnl_data_reg *reg, json_t *data,
80 struct nftnl_parse_err *err)
85 type = nftnl_jansson_parse_str(data,
"type", err);
90 if (strcmp(type,
"value") == 0)
91 return nftnl_data_reg_value_json_parse(reg, data, err);
92 else if (strcmp(type,
"verdict") == 0)
93 return nftnl_data_reg_verdict_json_parse(reg, data, err);
100 static int nftnl_data_reg_verdict_xml_parse(
union nftnl_data_reg *reg,
102 struct nftnl_parse_err *err)
105 const char *verdict_str;
108 verdict_str = nftnl_mxml_str_parse(tree,
"verdict", MXML_DESCEND_FIRST,
109 NFTNL_XML_MAND, err);
110 if (verdict_str == NULL)
113 if (nftnl_str2verdict(verdict_str, &verdict) != 0) {
114 err->node_name =
"verdict";
115 err->error = NFTNL_PARSE_EBADTYPE;
120 reg->verdict = (uint32_t)verdict;
122 chain = nftnl_mxml_str_parse(tree,
"chain", MXML_DESCEND_FIRST,
128 reg->chain = strdup(chain);
134 static int nftnl_data_reg_value_xml_parse(
union nftnl_data_reg *reg,
136 struct nftnl_parse_err *err)
141 if (nftnl_mxml_num_parse(tree,
"len", MXML_DESCEND_FIRST, BASE_DEC,
142 ®->len, NFTNL_TYPE_U8, NFTNL_XML_MAND, err) != 0)
145 for (i = 0; i < div_round_up(reg->len,
sizeof(uint32_t)); i++) {
146 sprintf(node_name,
"data%d", i);
148 if (nftnl_mxml_num_parse(tree, node_name, MXML_DESCEND_FIRST,
149 BASE_HEX, ®->val[i], NFTNL_TYPE_U32,
150 NFTNL_XML_MAND, err) != 0)
157 int nftnl_data_reg_xml_parse(
union nftnl_data_reg *reg, mxml_node_t *tree,
158 struct nftnl_parse_err *err)
163 node = mxmlFindElement(tree, tree,
"reg",
"type", NULL,
168 type = mxmlElementGetAttr(node,
"type");
173 if (strcmp(type,
"value") == 0)
174 return nftnl_data_reg_value_xml_parse(reg, node, err);
175 else if (strcmp(type,
"verdict") == 0)
176 return nftnl_data_reg_verdict_xml_parse(reg, node, err);
181 err->node_name =
"reg";
182 err->error = NFTNL_PARSE_EMISSINGNODE;
188 nftnl_data_reg_value_snprintf_json(
char *buf,
size_t size,
189 const union nftnl_data_reg *reg,
192 int len = size, offset = 0, ret, i, j;
196 ret = snprintf(buf, len,
"\"reg\":{\"type\":\"value\",");
197 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
199 ret = snprintf(buf+offset, len,
"\"len\":%u,", reg->len);
200 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
202 for (i = 0; i < div_round_up(reg->len,
sizeof(uint32_t)); i++) {
203 ret = snprintf(buf+offset, len,
"\"data%d\":\"0x", i);
204 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
206 utemp = htonl(reg->val[i]);
207 tmp = (uint8_t *)&utemp;
209 for (j = 0; j<
sizeof(uint32_t); j++) {
210 ret = snprintf(buf+offset, len,
"%.02x", tmp[j]);
211 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
214 ret = snprintf(buf+offset, len,
"\",");
215 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
218 ret = snprintf(buf+offset, len,
"}");
219 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
225 int nftnl_data_reg_value_snprintf_xml(
char *buf,
size_t size,
226 const union nftnl_data_reg *reg,
229 int len = size, offset = 0, ret, i, j;
233 ret = snprintf(buf, len,
"<reg type=\"value\">");
234 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
236 ret = snprintf(buf+offset, len,
"<len>%u</len>", reg->len);
237 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
239 for (i = 0; i < div_round_up(reg->len,
sizeof(uint32_t)); i++) {
240 ret = snprintf(buf+offset, len,
"<data%d>0x", i);
241 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
243 be = htonl(reg->val[i]);
244 tmp = (uint8_t *)&be;
246 for (j = 0; j <
sizeof(uint32_t); j++) {
247 ret = snprintf(buf+offset, len,
"%.02x", tmp[j]);
248 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
251 ret = snprintf(buf+offset, len,
"</data%d>", i);
252 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
255 ret = snprintf(buf+offset, len,
"</reg>");
256 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
262 nftnl_data_reg_value_snprintf_default(
char *buf,
size_t size,
263 const union nftnl_data_reg *reg,
266 int len = size, offset = 0, ret, i;
268 for (i = 0; i < div_round_up(reg->len,
sizeof(uint32_t)); i++) {
269 ret = snprintf(buf+offset, len,
"0x%.8x ", reg->val[i]);
270 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
277 nftnl_data_reg_verdict_snprintf_def(
char *buf,
size_t size,
278 const union nftnl_data_reg *reg,
281 int len = size, offset = 0, ret = 0;
283 ret = snprintf(buf, size,
"%s ", nftnl_verdict2str(reg->verdict));
284 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
286 if (reg->chain != NULL) {
287 ret = snprintf(buf+offset, len,
"-> %s ", reg->chain);
288 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
295 nftnl_data_reg_verdict_snprintf_xml(
char *buf,
size_t size,
296 const union nftnl_data_reg *reg,
299 int len = size, offset = 0, ret = 0;
301 ret = snprintf(buf, size,
"<reg type=\"verdict\">"
302 "<verdict>%s</verdict>", nftnl_verdict2str(reg->verdict));
303 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
305 if (reg->chain != NULL) {
306 ret = snprintf(buf+offset, len,
"<chain>%s</chain>",
308 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
311 ret = snprintf(buf+offset, len,
"</reg>");
312 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
318 nftnl_data_reg_verdict_snprintf_json(
char *buf,
size_t size,
319 const union nftnl_data_reg *reg,
322 int len = size, offset = 0, ret = 0;
324 ret = snprintf(buf, size,
"\"reg\":{\"type\":\"verdict\","
325 "\"verdict\":\"%s\"", nftnl_verdict2str(reg->verdict));
326 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
328 if (reg->chain != NULL) {
329 ret = snprintf(buf+offset, len,
",\"chain\":\"%s\"",
331 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
334 ret = snprintf(buf+offset, len,
"}");
335 SNPRINTF_BUFFER_SIZE(ret, size, len, offset);
340 int nftnl_data_reg_snprintf(
char *buf,
size_t size,
341 const union nftnl_data_reg *reg,
342 uint32_t output_format, uint32_t flags,
347 switch(output_format) {
348 case NFTNL_OUTPUT_DEFAULT:
349 return nftnl_data_reg_value_snprintf_default(buf, size,
351 case NFTNL_OUTPUT_XML:
352 return nftnl_data_reg_value_snprintf_xml(buf, size,
354 case NFTNL_OUTPUT_JSON:
355 return nftnl_data_reg_value_snprintf_json(buf, size,
362 switch(output_format) {
363 case NFTNL_OUTPUT_DEFAULT:
364 return nftnl_data_reg_verdict_snprintf_def(buf, size,
366 case NFTNL_OUTPUT_XML:
367 return nftnl_data_reg_verdict_snprintf_xml(buf, size,
369 case NFTNL_OUTPUT_JSON:
370 return nftnl_data_reg_verdict_snprintf_json(buf, size,
382 static int nftnl_data_parse_cb(
const struct nlattr *attr,
void *data)
384 const struct nlattr **tb = data;
385 int type = mnl_attr_get_type(attr);
387 if (mnl_attr_type_valid(attr, NFTA_DATA_MAX) < 0)
391 case NFTA_DATA_VALUE:
392 if (mnl_attr_validate(attr, MNL_TYPE_BINARY) < 0)
395 case NFTA_DATA_VERDICT:
396 if (mnl_attr_validate(attr, MNL_TYPE_NESTED) < 0)
404 static int nftnl_verdict_parse_cb(
const struct nlattr *attr,
void *data)
406 const struct nlattr **tb = data;
407 int type = mnl_attr_get_type(attr);
409 if (mnl_attr_type_valid(attr, NFTA_VERDICT_MAX) < 0)
413 case NFTA_VERDICT_CODE:
414 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
417 case NFTA_VERDICT_CHAIN:
418 if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0)
427 nftnl_parse_verdict(
union nftnl_data_reg *data,
const struct nlattr *attr,
int *type)
429 struct nlattr *tb[NFTA_VERDICT_MAX+1];
431 if (mnl_attr_parse_nested(attr, nftnl_verdict_parse_cb, tb) < 0) {
432 perror(
"mnl_attr_parse_nested");
436 if (!tb[NFTA_VERDICT_CODE])
439 data->verdict = ntohl(mnl_attr_get_u32(tb[NFTA_VERDICT_CODE]));
441 switch(data->verdict) {
449 *type = DATA_VERDICT;
450 data->len =
sizeof(data->verdict);
454 if (!tb[NFTA_VERDICT_CHAIN])
457 data->chain = strdup(mnl_attr_get_str(tb[NFTA_VERDICT_CHAIN]));
469 __nftnl_parse_data(
union nftnl_data_reg *data,
const struct nlattr *attr)
471 void *orig = mnl_attr_get_payload(attr);
472 uint32_t data_len = mnl_attr_get_payload_len(attr);
477 if (data_len >
sizeof(data->val))
480 memcpy(data->val, orig, data_len);
481 data->len = data_len;
486 int nftnl_parse_data(
union nftnl_data_reg *data,
struct nlattr *attr,
int *type)
488 struct nlattr *tb[NFTA_DATA_MAX+1] = {};
491 if (mnl_attr_parse_nested(attr, nftnl_data_parse_cb, tb) < 0) {
492 perror(
"mnl_attr_parse_nested");
495 if (tb[NFTA_DATA_VALUE]) {
499 ret = __nftnl_parse_data(data, tb[NFTA_DATA_VALUE]);
503 if (tb[NFTA_DATA_VERDICT])
504 ret = nftnl_parse_verdict(data, tb[NFTA_DATA_VERDICT], type);
509 void nftnl_free_verdict(
const union nftnl_data_reg *data)
511 switch(data->verdict) {