6 * a Net::DNS like library for C
8 * (c) NLnet Labs, 2004-2006
10 * See the file LICENSE for the license
13 #include <ldns/config.h>
15 #include <ldns/ldns.h>
19 * do this as functions to get type checking
24 ldns_rdf_size(const ldns_rdf *rd)
31 ldns_rdf_get_type(const ldns_rdf *rd)
38 ldns_rdf_data(const ldns_rdf *rd)
46 ldns_rdf_set_size(ldns_rdf *rd, size_t size)
53 ldns_rdf_set_type(ldns_rdf *rd, ldns_rdf_type type)
60 ldns_rdf_set_data(ldns_rdf *rd, void *data)
62 /* only copy the pointer */
67 /* for types that allow it, return
68 * the native/host order type */
70 ldns_rdf2native_int8(const ldns_rdf *rd)
74 /* only allow 8 bit rdfs */
75 if (ldns_rdf_size(rd) != LDNS_RDF_SIZE_BYTE) {
79 memcpy(&data, ldns_rdf_data(rd), sizeof(data));
84 ldns_rdf2native_int16(const ldns_rdf *rd)
88 /* only allow 16 bit rdfs */
89 if (ldns_rdf_size(rd) != LDNS_RDF_SIZE_WORD) {
93 memcpy(&data, ldns_rdf_data(rd), sizeof(data));
98 ldns_rdf2native_int32(const ldns_rdf *rd)
102 /* only allow 32 bit rdfs */
103 if (ldns_rdf_size(rd) != LDNS_RDF_SIZE_DOUBLEWORD) {
107 memcpy(&data, ldns_rdf_data(rd), sizeof(data));
112 ldns_rdf2native_time_t(const ldns_rdf *rd)
116 switch(ldns_rdf_get_type(rd)) {
117 case LDNS_RDF_TYPE_TIME:
118 memcpy(&data, ldns_rdf_data(rd), sizeof(data));
119 return (time_t)ntohl(data);
126 ldns_native2rdf_int8(ldns_rdf_type type, uint8_t value)
128 return ldns_rdf_new_frm_data(type, LDNS_RDF_SIZE_BYTE, &value);
132 ldns_native2rdf_int16(ldns_rdf_type type, uint16_t value)
134 uint16_t *rdf_data = LDNS_XMALLOC(uint16_t, 1);
138 ldns_write_uint16(rdf_data, value);
139 return ldns_rdf_new(type, LDNS_RDF_SIZE_WORD, rdf_data);
143 ldns_native2rdf_int32(ldns_rdf_type type, uint32_t value)
145 uint32_t *rdf_data = LDNS_XMALLOC(uint32_t, 1);
149 ldns_write_uint32(rdf_data, value);
150 return ldns_rdf_new(type, LDNS_RDF_SIZE_DOUBLEWORD, rdf_data);
154 ldns_native2rdf_int16_data(size_t size, uint8_t *data)
156 uint8_t *rdf_data = LDNS_XMALLOC(uint8_t, size + 2);
160 ldns_write_uint16(rdf_data, size);
161 memcpy(rdf_data + 2, data, size);
162 return ldns_rdf_new(LDNS_RDF_TYPE_INT16_DATA, size + 2, rdf_data);
165 /* note: data must be allocated memory */
167 ldns_rdf_new(ldns_rdf_type type, size_t size, void *data)
170 rd = LDNS_MALLOC(ldns_rdf);
174 ldns_rdf_set_size(rd, size);
175 ldns_rdf_set_type(rd, type);
176 ldns_rdf_set_data(rd, data);
181 ldns_rdf_new_frm_data(ldns_rdf_type type, size_t size, const void *data)
185 /* if the size is too big, fail */
186 if (size > LDNS_MAX_RDFLEN) {
191 rdf = LDNS_MALLOC(ldns_rdf);
195 rdf->_data = LDNS_XMALLOC(uint8_t, size);
202 ldns_rdf_set_type(rdf, type);
203 ldns_rdf_set_size(rdf, size);
204 memcpy(rdf->_data, data, size);
210 ldns_rdf_clone(const ldns_rdf *rd)
213 return (ldns_rdf_new_frm_data( ldns_rdf_get_type(rd),
214 ldns_rdf_size(rd), ldns_rdf_data(rd)));
218 ldns_rdf_deep_free(ldns_rdf *rd)
222 LDNS_FREE(rd->_data);
229 ldns_rdf_free(ldns_rdf *rd)
237 ldns_rdf_new_frm_str(ldns_rdf_type type, const char *str)
239 ldns_rdf *rdf = NULL;
243 case LDNS_RDF_TYPE_DNAME:
244 status = ldns_str2rdf_dname(&rdf, str);
246 case LDNS_RDF_TYPE_INT8:
247 status = ldns_str2rdf_int8(&rdf, str);
249 case LDNS_RDF_TYPE_INT16:
250 status = ldns_str2rdf_int16(&rdf, str);
252 case LDNS_RDF_TYPE_INT32:
253 status = ldns_str2rdf_int32(&rdf, str);
255 case LDNS_RDF_TYPE_A:
256 status = ldns_str2rdf_a(&rdf, str);
258 case LDNS_RDF_TYPE_AAAA:
259 status = ldns_str2rdf_aaaa(&rdf, str);
261 case LDNS_RDF_TYPE_STR:
262 status = ldns_str2rdf_str(&rdf, str);
264 case LDNS_RDF_TYPE_APL:
265 status = ldns_str2rdf_apl(&rdf, str);
267 case LDNS_RDF_TYPE_B64:
268 status = ldns_str2rdf_b64(&rdf, str);
270 case LDNS_RDF_TYPE_B32_EXT:
271 status = ldns_str2rdf_b32_ext(&rdf, str);
273 case LDNS_RDF_TYPE_HEX:
274 status = ldns_str2rdf_hex(&rdf, str);
276 case LDNS_RDF_TYPE_NSEC:
277 status = ldns_str2rdf_nsec(&rdf, str);
279 case LDNS_RDF_TYPE_TYPE:
280 status = ldns_str2rdf_type(&rdf, str);
282 case LDNS_RDF_TYPE_CLASS:
283 status = ldns_str2rdf_class(&rdf, str);
285 case LDNS_RDF_TYPE_CERT_ALG:
286 status = ldns_str2rdf_cert_alg(&rdf, str);
288 case LDNS_RDF_TYPE_ALG:
289 status = ldns_str2rdf_alg(&rdf, str);
291 case LDNS_RDF_TYPE_UNKNOWN:
292 status = ldns_str2rdf_unknown(&rdf, str);
294 case LDNS_RDF_TYPE_TIME:
295 status = ldns_str2rdf_time(&rdf, str);
297 case LDNS_RDF_TYPE_PERIOD:
298 status = ldns_str2rdf_period(&rdf, str);
300 case LDNS_RDF_TYPE_TSIG:
301 status = ldns_str2rdf_tsig(&rdf, str);
303 case LDNS_RDF_TYPE_SERVICE:
304 status = ldns_str2rdf_service(&rdf, str);
306 case LDNS_RDF_TYPE_LOC:
307 status = ldns_str2rdf_loc(&rdf, str);
309 case LDNS_RDF_TYPE_WKS:
310 status = ldns_str2rdf_wks(&rdf, str);
312 case LDNS_RDF_TYPE_NSAP:
313 status = ldns_str2rdf_nsap(&rdf, str);
315 case LDNS_RDF_TYPE_ATMA:
316 status = ldns_str2rdf_atma(&rdf, str);
318 case LDNS_RDF_TYPE_IPSECKEY:
319 status = ldns_str2rdf_ipseckey(&rdf, str);
321 case LDNS_RDF_TYPE_NSEC3_SALT:
322 status = ldns_str2rdf_nsec3_salt(&rdf, str);
324 case LDNS_RDF_TYPE_NSEC3_NEXT_OWNER:
325 status = ldns_str2rdf_b32_ext(&rdf, str);
327 case LDNS_RDF_TYPE_NONE:
329 /* default default ??? */
330 status = LDNS_STATUS_ERR;
333 if (LDNS_STATUS_OK == status) {
334 ldns_rdf_set_type(rdf, type);
344 ldns_rdf_new_frm_fp(ldns_rdf **rdf, ldns_rdf_type type, FILE *fp)
346 return ldns_rdf_new_frm_fp_l(rdf, type, fp, NULL);
350 ldns_rdf_new_frm_fp_l(ldns_rdf **rdf, ldns_rdf_type type, FILE *fp, int *line_nr)
356 line = LDNS_XMALLOC(char, LDNS_MAX_LINELEN + 1);
358 return LDNS_STATUS_MEM_ERR;
361 /* read an entire line in from the file */
362 if ((t = ldns_fget_token_l(fp, line, LDNS_PARSE_SKIP_SPACE, 0, line_nr)) == -1) {
364 return LDNS_STATUS_SYNTAX_RDATA_ERR;
366 r = ldns_rdf_new_frm_str(type, (const char*) line);
370 return LDNS_STATUS_OK;
372 return LDNS_STATUS_NULL;
377 ldns_rdf_address_reverse(ldns_rdf *rd)
379 uint8_t buf_4[LDNS_IP4ADDRLEN];
380 uint8_t buf_6[LDNS_IP6ADDRLEN * 2];
392 if (ldns_rdf_get_type(rd) != LDNS_RDF_TYPE_A &&
393 ldns_rdf_get_type(rd) != LDNS_RDF_TYPE_AAAA) {
400 switch(ldns_rdf_get_type(rd)) {
401 case LDNS_RDF_TYPE_A:
402 /* the length of the buffer is 4 */
403 buf_4[3] = ldns_rdf_data(rd)[0];
404 buf_4[2] = ldns_rdf_data(rd)[1];
405 buf_4[1] = ldns_rdf_data(rd)[2];
406 buf_4[0] = ldns_rdf_data(rd)[3];
407 in_addr = ldns_dname_new_frm_str("in-addr.arpa.");
411 /* make a new rdf and convert that back */
412 rev = ldns_rdf_new_frm_data( LDNS_RDF_TYPE_A,
413 LDNS_IP4ADDRLEN, (void*)&buf_4);
419 /* convert rev to a string */
420 char_dname = ldns_rdf2str(rev);
423 ldns_rdf_deep_free(rev);
426 /* transform back to rdf with type dname */
427 ret_dname = ldns_dname_new_frm_str(char_dname);
430 ldns_rdf_deep_free(rev);
431 LDNS_FREE(char_dname);
434 /* not needed anymore */
435 ldns_rdf_deep_free(rev);
436 LDNS_FREE(char_dname);
438 case LDNS_RDF_TYPE_AAAA:
439 /* some foo magic to reverse the nibbles ... */
441 for (nbit = 127; nbit >= 0; nbit = nbit - 4) {
442 /* calculate octett (8 bit) */
443 octet = ( ((unsigned int) nbit) & 0x78) >> 3;
444 /* calculate nibble */
445 nnibble = ( ((unsigned int) nbit) & 0x04) >> 2;
447 nibble = (ldns_rdf_data(rd)[octet] & ( 0xf << (4 * (1 -
448 nnibble)) ) ) >> ( 4 * (1 -
451 buf_6[(LDNS_IP6ADDRLEN * 2 - 1) -
452 (octet * 2 + nnibble)] =
453 (uint8_t)ldns_int_to_hexdigit((int)nibble);
456 char_dname = LDNS_XMALLOC(char, (LDNS_IP6ADDRLEN * 4));
460 char_dname[LDNS_IP6ADDRLEN * 4 - 1] = '\0'; /* closure */
462 /* walk the string and add . 's */
463 for (i = 0, j = 0; i < LDNS_IP6ADDRLEN * 2; i++, j = j + 2) {
464 char_dname[j] = (char)buf_6[i];
465 if (i != LDNS_IP6ADDRLEN * 2 - 1) {
466 char_dname[j + 1] = '.';
469 in_addr = ldns_dname_new_frm_str("ip6.arpa.");
471 LDNS_FREE(char_dname);
475 /* convert rev to a string */
476 ret_dname = ldns_dname_new_frm_str(char_dname);
477 LDNS_FREE(char_dname);
479 ldns_rdf_deep_free(in_addr);
487 rev = ldns_dname_cat_clone(ret_dname, in_addr);
489 ldns_rdf_deep_free(ret_dname);
490 ldns_rdf_deep_free(in_addr);
495 ldns_octet(char *word, size_t *length)
501 for (s = p = word; *s != '\0'; s++,p++) {
505 return LDNS_STATUS_EMPTY_LABEL;
511 if ('0' <= s[1] && s[1] <= '9' &&
512 '0' <= s[2] && s[2] <= '9' &&
513 '0' <= s[3] && s[3] <= '9') {
515 int val = ((s[1] - '0') * 100 +
516 (s[2] - '0') * 10 + (s[3] - '0'));
518 if (0 <= val && val <= 255) {
519 /* this also handles \0 */
524 return LDNS_STATUS_DDD_OVERFLOW;
527 /* an espaced character, like \<space> ?
528 * remove the '\' keep the rest */
534 /* non quoted " Is either first or the last character in
537 *p = *++s; /* skip it */
539 /* I'm not sure if this is needed in libdns... MG */
541 /* ok, it was the last one */
543 return LDNS_STATUS_OK;
553 return LDNS_STATUS_OK;
557 ldns_rdf_compare(const ldns_rdf *rd1, const ldns_rdf *rd2)
562 /* only when both are not NULL we can say anything about them */
569 i1 = ldns_rdf_size(rd1);
570 i2 = ldns_rdf_size(rd2);
574 } else if (i1 > i2) {
577 d1 = (uint8_t*)ldns_rdf_data(rd1);
578 d2 = (uint8_t*)ldns_rdf_data(rd2);
579 for(i = 0; i < i1; i++) {
582 } else if (d1[i] > d2[i]) {
591 ldns_str2period(const char *nptr, const char **endptr)
595 uint32_t seconds = 0;
597 for(*endptr = nptr; **endptr; (*endptr)++) {
628 seconds += i * 60 * 60;
633 seconds += i * 60 * 60 * 24;
638 seconds += i * 60 * 60 * 24 * 7;
652 i += (**endptr - '0');
656 /* disregard signedness */
661 /* disregard signedness */