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);
139 ldns_write_uint16(rdf_data, value);
140 rdf = ldns_rdf_new(type, LDNS_RDF_SIZE_WORD, rdf_data);
147 ldns_native2rdf_int32(ldns_rdf_type type, uint32_t value)
149 uint32_t *rdf_data = LDNS_XMALLOC(uint32_t, 1);
154 ldns_write_uint32(rdf_data, value);
155 rdf = ldns_rdf_new(type, LDNS_RDF_SIZE_DOUBLEWORD, rdf_data);
162 ldns_native2rdf_int16_data(size_t size, uint8_t *data)
164 uint8_t *rdf_data = LDNS_XMALLOC(uint8_t, size + 2);
169 ldns_write_uint16(rdf_data, size);
170 memcpy(rdf_data + 2, data, size);
171 rdf = ldns_rdf_new(LDNS_RDF_TYPE_INT16_DATA, size + 2, rdf_data);
177 /* note: data must be allocated memory */
179 ldns_rdf_new(ldns_rdf_type type, size_t size, void *data)
182 rd = LDNS_MALLOC(ldns_rdf);
186 ldns_rdf_set_size(rd, size);
187 ldns_rdf_set_type(rd, type);
188 ldns_rdf_set_data(rd, data);
193 ldns_rdf_new_frm_data(ldns_rdf_type type, size_t size, const void *data)
197 /* if the size is too big, fail */
198 if (size > LDNS_MAX_RDFLEN) {
203 rdf = LDNS_MALLOC(ldns_rdf);
207 rdf->_data = LDNS_XMALLOC(uint8_t, size);
214 ldns_rdf_set_type(rdf, type);
215 ldns_rdf_set_size(rdf, size);
216 memcpy(rdf->_data, data, size);
222 ldns_rdf_clone(const ldns_rdf *rd)
225 return (ldns_rdf_new_frm_data( ldns_rdf_get_type(rd),
226 ldns_rdf_size(rd), ldns_rdf_data(rd)));
230 ldns_rdf_deep_free(ldns_rdf *rd)
234 LDNS_FREE(rd->_data);
241 ldns_rdf_free(ldns_rdf *rd)
249 ldns_rdf_new_frm_str(ldns_rdf_type type, const char *str)
251 ldns_rdf *rdf = NULL;
255 case LDNS_RDF_TYPE_DNAME:
256 status = ldns_str2rdf_dname(&rdf, str);
258 case LDNS_RDF_TYPE_INT8:
259 status = ldns_str2rdf_int8(&rdf, str);
261 case LDNS_RDF_TYPE_INT16:
262 status = ldns_str2rdf_int16(&rdf, str);
264 case LDNS_RDF_TYPE_INT32:
265 status = ldns_str2rdf_int32(&rdf, str);
267 case LDNS_RDF_TYPE_A:
268 status = ldns_str2rdf_a(&rdf, str);
270 case LDNS_RDF_TYPE_AAAA:
271 status = ldns_str2rdf_aaaa(&rdf, str);
273 case LDNS_RDF_TYPE_STR:
274 status = ldns_str2rdf_str(&rdf, str);
276 case LDNS_RDF_TYPE_APL:
277 status = ldns_str2rdf_apl(&rdf, str);
279 case LDNS_RDF_TYPE_B64:
280 status = ldns_str2rdf_b64(&rdf, str);
282 case LDNS_RDF_TYPE_B32_EXT:
283 status = ldns_str2rdf_b32_ext(&rdf, str);
285 case LDNS_RDF_TYPE_HEX:
286 status = ldns_str2rdf_hex(&rdf, str);
288 case LDNS_RDF_TYPE_NSEC:
289 status = ldns_str2rdf_nsec(&rdf, str);
291 case LDNS_RDF_TYPE_TYPE:
292 status = ldns_str2rdf_type(&rdf, str);
294 case LDNS_RDF_TYPE_CLASS:
295 status = ldns_str2rdf_class(&rdf, str);
297 case LDNS_RDF_TYPE_CERT_ALG:
298 status = ldns_str2rdf_cert_alg(&rdf, str);
300 case LDNS_RDF_TYPE_ALG:
301 status = ldns_str2rdf_alg(&rdf, str);
303 case LDNS_RDF_TYPE_UNKNOWN:
304 status = ldns_str2rdf_unknown(&rdf, str);
306 case LDNS_RDF_TYPE_TIME:
307 status = ldns_str2rdf_time(&rdf, str);
309 case LDNS_RDF_TYPE_PERIOD:
310 status = ldns_str2rdf_period(&rdf, str);
312 case LDNS_RDF_TYPE_TSIG:
313 status = ldns_str2rdf_tsig(&rdf, str);
315 case LDNS_RDF_TYPE_SERVICE:
316 status = ldns_str2rdf_service(&rdf, str);
318 case LDNS_RDF_TYPE_LOC:
319 status = ldns_str2rdf_loc(&rdf, str);
321 case LDNS_RDF_TYPE_WKS:
322 status = ldns_str2rdf_wks(&rdf, str);
324 case LDNS_RDF_TYPE_NSAP:
325 status = ldns_str2rdf_nsap(&rdf, str);
327 case LDNS_RDF_TYPE_ATMA:
328 status = ldns_str2rdf_atma(&rdf, str);
330 case LDNS_RDF_TYPE_IPSECKEY:
331 status = ldns_str2rdf_ipseckey(&rdf, str);
333 case LDNS_RDF_TYPE_NSEC3_SALT:
334 status = ldns_str2rdf_nsec3_salt(&rdf, str);
336 case LDNS_RDF_TYPE_NSEC3_NEXT_OWNER:
337 status = ldns_str2rdf_b32_ext(&rdf, str);
339 case LDNS_RDF_TYPE_NONE:
341 /* default default ??? */
342 status = LDNS_STATUS_ERR;
345 if (LDNS_STATUS_OK == status) {
346 ldns_rdf_set_type(rdf, type);
356 ldns_rdf_new_frm_fp(ldns_rdf **rdf, ldns_rdf_type type, FILE *fp)
358 return ldns_rdf_new_frm_fp_l(rdf, type, fp, NULL);
362 ldns_rdf_new_frm_fp_l(ldns_rdf **rdf, ldns_rdf_type type, FILE *fp, int *line_nr)
368 line = LDNS_XMALLOC(char, LDNS_MAX_LINELEN + 1);
370 return LDNS_STATUS_MEM_ERR;
373 /* read an entire line in from the file */
374 if ((t = ldns_fget_token_l(fp, line, LDNS_PARSE_SKIP_SPACE, 0, line_nr)) == -1 || t == 0) {
376 return LDNS_STATUS_SYNTAX_RDATA_ERR;
378 r = ldns_rdf_new_frm_str(type, (const char*) line);
382 return LDNS_STATUS_OK;
384 return LDNS_STATUS_NULL;
389 ldns_rdf_address_reverse(ldns_rdf *rd)
391 uint8_t buf_4[LDNS_IP4ADDRLEN];
392 uint8_t buf_6[LDNS_IP6ADDRLEN * 2];
404 if (ldns_rdf_get_type(rd) != LDNS_RDF_TYPE_A &&
405 ldns_rdf_get_type(rd) != LDNS_RDF_TYPE_AAAA) {
412 switch(ldns_rdf_get_type(rd)) {
413 case LDNS_RDF_TYPE_A:
414 /* the length of the buffer is 4 */
415 buf_4[3] = ldns_rdf_data(rd)[0];
416 buf_4[2] = ldns_rdf_data(rd)[1];
417 buf_4[1] = ldns_rdf_data(rd)[2];
418 buf_4[0] = ldns_rdf_data(rd)[3];
419 in_addr = ldns_dname_new_frm_str("in-addr.arpa.");
423 /* make a new rdf and convert that back */
424 rev = ldns_rdf_new_frm_data( LDNS_RDF_TYPE_A,
425 LDNS_IP4ADDRLEN, (void*)&buf_4);
431 /* convert rev to a string */
432 char_dname = ldns_rdf2str(rev);
435 ldns_rdf_deep_free(rev);
438 /* transform back to rdf with type dname */
439 ret_dname = ldns_dname_new_frm_str(char_dname);
442 ldns_rdf_deep_free(rev);
443 LDNS_FREE(char_dname);
446 /* not needed anymore */
447 ldns_rdf_deep_free(rev);
448 LDNS_FREE(char_dname);
450 case LDNS_RDF_TYPE_AAAA:
451 /* some foo magic to reverse the nibbles ... */
453 for (nbit = 127; nbit >= 0; nbit = nbit - 4) {
454 /* calculate octett (8 bit) */
455 octet = ( ((unsigned int) nbit) & 0x78) >> 3;
456 /* calculate nibble */
457 nnibble = ( ((unsigned int) nbit) & 0x04) >> 2;
459 nibble = (ldns_rdf_data(rd)[octet] & ( 0xf << (4 * (1 -
460 nnibble)) ) ) >> ( 4 * (1 -
463 buf_6[(LDNS_IP6ADDRLEN * 2 - 1) -
464 (octet * 2 + nnibble)] =
465 (uint8_t)ldns_int_to_hexdigit((int)nibble);
468 char_dname = LDNS_XMALLOC(char, (LDNS_IP6ADDRLEN * 4));
472 char_dname[LDNS_IP6ADDRLEN * 4 - 1] = '\0'; /* closure */
474 /* walk the string and add . 's */
475 for (i = 0, j = 0; i < LDNS_IP6ADDRLEN * 2; i++, j = j + 2) {
476 char_dname[j] = (char)buf_6[i];
477 if (i != LDNS_IP6ADDRLEN * 2 - 1) {
478 char_dname[j + 1] = '.';
481 in_addr = ldns_dname_new_frm_str("ip6.arpa.");
483 LDNS_FREE(char_dname);
487 /* convert rev to a string */
488 ret_dname = ldns_dname_new_frm_str(char_dname);
489 LDNS_FREE(char_dname);
491 ldns_rdf_deep_free(in_addr);
499 rev = ldns_dname_cat_clone(ret_dname, in_addr);
501 ldns_rdf_deep_free(ret_dname);
502 ldns_rdf_deep_free(in_addr);
507 ldns_octet(char *word, size_t *length)
513 for (s = p = word; *s != '\0'; s++,p++) {
517 return LDNS_STATUS_EMPTY_LABEL;
523 if ('0' <= s[1] && s[1] <= '9' &&
524 '0' <= s[2] && s[2] <= '9' &&
525 '0' <= s[3] && s[3] <= '9') {
527 int val = ((s[1] - '0') * 100 +
528 (s[2] - '0') * 10 + (s[3] - '0'));
530 if (0 <= val && val <= 255) {
531 /* this also handles \0 */
536 return LDNS_STATUS_DDD_OVERFLOW;
539 /* an espaced character, like \<space> ?
540 * remove the '\' keep the rest */
546 /* non quoted " Is either first or the last character in
549 *p = *++s; /* skip it */
551 /* I'm not sure if this is needed in libdns... MG */
553 /* ok, it was the last one */
555 return LDNS_STATUS_OK;
565 return LDNS_STATUS_OK;
569 ldns_rdf_compare(const ldns_rdf *rd1, const ldns_rdf *rd2)
574 /* only when both are not NULL we can say anything about them */
581 i1 = ldns_rdf_size(rd1);
582 i2 = ldns_rdf_size(rd2);
586 } else if (i1 > i2) {
589 d1 = (uint8_t*)ldns_rdf_data(rd1);
590 d2 = (uint8_t*)ldns_rdf_data(rd2);
591 for(i = 0; i < i1; i++) {
594 } else if (d1[i] > d2[i]) {
603 ldns_str2period(const char *nptr, const char **endptr)
607 uint32_t seconds = 0;
609 for(*endptr = nptr; **endptr; (*endptr)++) {
640 seconds += i * 60 * 60;
645 seconds += i * 60 * 60 * 24;
650 seconds += i * 60 * 60 * 24 * 7;
664 i += (**endptr - '0');
668 /* disregard signedness */
673 /* disregard signedness */