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[apple/network_cmds.git] / unbound / ldns / str2wire.c
1 /**
2 * str2wire.c - read txt presentation of RRs
3 *
4 * (c) NLnet Labs, 2005-2006
5 *
6 * See the file LICENSE for the license
7 */
8
9 /**
10 * \file
11 *
12 * Parses text to wireformat.
13 */
14 #include "config.h"
15 #include "ldns/str2wire.h"
16 #include "ldns/wire2str.h"
17 #include "ldns/sbuffer.h"
18 #include "ldns/parse.h"
19 #include "ldns/parseutil.h"
20 #include <ctype.h>
21 #ifdef HAVE_TIME_H
22 #include <time.h>
23 #endif
24 #ifdef HAVE_NETDB_H
25 #include <netdb.h>
26 #endif
27
28 /** return an error */
29 #define RET_ERR(e, off) ((int)((e)|((off)<<LDNS_WIREPARSE_SHIFT)))
30 /** Move parse error but keep its ID */
31 #define RET_ERR_SHIFT(e, move) RET_ERR(LDNS_WIREPARSE_ERROR(e), LDNS_WIREPARSE_OFFSET(e)+(move));
32 #define LDNS_IP6ADDRLEN (128/8)
33
34 /*
35 * No special care is taken, all dots are translated into
36 * label separators.
37 * @param rel: true if the domain is not absolute (not terminated in .).
38 * The output is then still terminated with a '0' rootlabel.
39 */
40 static int sldns_str2wire_dname_buf_rel(const char* str, uint8_t* buf,
41 size_t* olen, int* rel)
42 {
43 size_t len;
44
45 const char *s;
46 uint8_t *q, *pq, label_len;
47
48 if(rel) *rel = 0;
49 len = strlen((char*)str);
50 /* octet representation can make strings a lot longer than actual length */
51 if (len > LDNS_MAX_DOMAINLEN * 4) {
52 return RET_ERR(LDNS_WIREPARSE_ERR_DOMAINNAME_OVERFLOW, 0);
53 }
54 if (0 == len) {
55 return RET_ERR(LDNS_WIREPARSE_ERR_DOMAINNAME_UNDERFLOW, 0);
56 }
57
58 /* root label */
59 if (1 == len && *str == '.') {
60 if(*olen < 1)
61 return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, 0);
62 buf[0] = 0;
63 *olen = 1;
64 return LDNS_WIREPARSE_ERR_OK;
65 }
66
67 /* get on with the rest */
68
69 /* s is on the current character in the string
70 * pq points to where the labellength is going to go
71 * label_len keeps track of the current label's length
72 * q builds the dname inside the buf array
73 */
74 len = 0;
75 if(*olen < 1)
76 return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, 0);
77 q = buf+1;
78 pq = buf;
79 label_len = 0;
80 for (s = str; *s; s++, q++) {
81 if (q >= buf + *olen)
82 return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, q-buf);
83 if (q > buf + LDNS_MAX_DOMAINLEN)
84 return RET_ERR(LDNS_WIREPARSE_ERR_DOMAINNAME_OVERFLOW, q-buf);
85 switch (*s) {
86 case '.':
87 if (label_len > LDNS_MAX_LABELLEN) {
88 return RET_ERR(LDNS_WIREPARSE_ERR_LABEL_OVERFLOW, q-buf);
89 }
90 if (label_len == 0) {
91 return RET_ERR(LDNS_WIREPARSE_ERR_EMPTY_LABEL, q-buf);
92 }
93 len += label_len + 1;
94 *q = 0;
95 *pq = label_len;
96 label_len = 0;
97 pq = q;
98 break;
99 case '\\':
100 /* octet value or literal char */
101 s += 1;
102 if (!sldns_parse_escape(q, &s)) {
103 *q = 0;
104 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_BAD_ESCAPE, q-buf);
105 }
106 s -= 1;
107 label_len++;
108 break;
109 default:
110 *q = (uint8_t)*s;
111 label_len++;
112 }
113 }
114
115 /* add root label if last char was not '.' */
116 if(label_len != 0) {
117 if(rel) *rel = 1;
118 if (q >= buf + *olen)
119 return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL, q-buf);
120 if (q > buf + LDNS_MAX_DOMAINLEN) {
121 return RET_ERR(LDNS_WIREPARSE_ERR_DOMAINNAME_OVERFLOW, q-buf);
122 }
123 if (label_len > LDNS_MAX_LABELLEN) {
124 return RET_ERR(LDNS_WIREPARSE_ERR_LABEL_OVERFLOW, q-buf);
125 }
126 if (label_len == 0) { /* label_len 0 but not . at end? */
127 return RET_ERR(LDNS_WIREPARSE_ERR_EMPTY_LABEL, q-buf);
128 }
129 len += label_len + 1;
130 *pq = label_len;
131 *q = 0;
132 }
133 len++;
134 *olen = len;
135
136 return LDNS_WIREPARSE_ERR_OK;
137 }
138
139 int sldns_str2wire_dname_buf(const char* str, uint8_t* buf, size_t* len)
140 {
141 return sldns_str2wire_dname_buf_rel(str, buf, len, NULL);
142 }
143
144 int sldns_str2wire_dname_buf_origin(const char* str, uint8_t* buf, size_t* len,
145 uint8_t* origin, size_t origin_len)
146 {
147 size_t dlen = *len;
148 int rel = 0;
149 int s = sldns_str2wire_dname_buf_rel(str, buf, &dlen, &rel);
150 if(s) return s;
151
152 if(rel && origin && dlen > 0) {
153 if(dlen + origin_len - 1 > LDNS_MAX_DOMAINLEN)
154 return RET_ERR(LDNS_WIREPARSE_ERR_DOMAINNAME_OVERFLOW,
155 LDNS_MAX_DOMAINLEN);
156 if(dlen + origin_len - 1 > *len)
157 return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
158 *len);
159 memmove(buf+dlen-1, origin, origin_len);
160 *len = dlen + origin_len - 1;
161 } else
162 *len = dlen;
163 return LDNS_WIREPARSE_ERR_OK;
164 }
165
166 uint8_t* sldns_str2wire_dname(const char* str, size_t* len)
167 {
168 uint8_t dname[LDNS_MAX_DOMAINLEN+1];
169 *len = sizeof(dname);
170 if(sldns_str2wire_dname_buf(str, dname, len) == 0) {
171 uint8_t* r = (uint8_t*)malloc(*len);
172 if(r) return memcpy(r, dname, *len);
173 }
174 *len = 0;
175 return NULL;
176 }
177
178 /** read owner name */
179 static int
180 rrinternal_get_owner(sldns_buffer* strbuf, uint8_t* rr, size_t* len,
181 size_t* dname_len, uint8_t* origin, size_t origin_len, uint8_t* prev,
182 size_t prev_len, char* token, size_t token_len)
183 {
184 /* split the rr in its parts -1 signals trouble */
185 if(sldns_bget_token(strbuf, token, "\t\n ", token_len) == -1) {
186 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX,
187 sldns_buffer_position(strbuf));
188 }
189
190 if(strcmp(token, "@") == 0) {
191 uint8_t* tocopy;
192 if (origin) {
193 *dname_len = origin_len;
194 tocopy = origin;
195 } else if (prev) {
196 *dname_len = prev_len;
197 tocopy = prev;
198 } else {
199 /* default to root */
200 *dname_len = 1;
201 tocopy = (uint8_t*)"\0";
202 }
203 if(*len < *dname_len)
204 return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
205 sldns_buffer_position(strbuf));
206 memmove(rr, tocopy, *dname_len);
207 } else if(strlen(token) == 0) {
208 /* no ownername was given, try prev, if that fails
209 * origin, else default to root */
210 uint8_t* tocopy;
211 if(prev) {
212 *dname_len = prev_len;
213 tocopy = prev;
214 } else if(origin) {
215 *dname_len = origin_len;
216 tocopy = origin;
217 } else {
218 *dname_len = 1;
219 tocopy = (uint8_t*)"\0";
220 }
221 if(*len < *dname_len)
222 return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
223 sldns_buffer_position(strbuf));
224 memmove(rr, tocopy, *dname_len);
225 } else {
226 size_t dlen = *len;
227 int s = sldns_str2wire_dname_buf_origin(token, rr, &dlen,
228 origin, origin_len);
229 if(s) return RET_ERR_SHIFT(s,
230 sldns_buffer_position(strbuf)-strlen(token));
231 *dname_len = dlen;
232 }
233 return LDNS_WIREPARSE_ERR_OK;
234 }
235
236 /** read ttl */
237 static int
238 rrinternal_get_ttl(sldns_buffer* strbuf, char* token, size_t token_len,
239 int* not_there, uint32_t* ttl, uint32_t default_ttl)
240 {
241 const char* endptr;
242 if(sldns_bget_token(strbuf, token, "\t\n ", token_len) == -1) {
243 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_TTL,
244 sldns_buffer_position(strbuf));
245 }
246 *ttl = (uint32_t) sldns_str2period(token, &endptr);
247
248 if (strlen(token) > 0 && !isdigit((unsigned char)token[0])) {
249 *not_there = 1;
250 /* ah, it's not there or something */
251 if (default_ttl == 0) {
252 *ttl = LDNS_DEFAULT_TTL;
253 } else {
254 *ttl = default_ttl;
255 }
256 }
257 return LDNS_WIREPARSE_ERR_OK;
258 }
259
260 /** read class */
261 static int
262 rrinternal_get_class(sldns_buffer* strbuf, char* token, size_t token_len,
263 int* not_there, uint16_t* cl)
264 {
265 /* if 'not_there' then we got token from previous parse routine */
266 if(!*not_there) {
267 /* parse new token for class */
268 if(sldns_bget_token(strbuf, token, "\t\n ", token_len) == -1) {
269 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_CLASS,
270 sldns_buffer_position(strbuf));
271 }
272 } else *not_there = 0;
273 *cl = sldns_get_rr_class_by_name(token);
274 /* class can be left out too, assume IN, current token must be type */
275 if(*cl == 0 && strcmp(token, "CLASS0") != 0) {
276 *not_there = 1;
277 *cl = LDNS_RR_CLASS_IN;
278 }
279 return LDNS_WIREPARSE_ERR_OK;
280 }
281
282 /** read type */
283 static int
284 rrinternal_get_type(sldns_buffer* strbuf, char* token, size_t token_len,
285 int* not_there, uint16_t* tp)
286 {
287 /* if 'not_there' then we got token from previous parse routine */
288 if(!*not_there) {
289 /* parse new token for type */
290 if(sldns_bget_token(strbuf, token, "\t\n ", token_len) == -1) {
291 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_TYPE,
292 sldns_buffer_position(strbuf));
293 }
294 }
295 *tp = sldns_get_rr_type_by_name(token);
296 if(*tp == 0 && strcmp(token, "TYPE0") != 0) {
297 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_TYPE,
298 sldns_buffer_position(strbuf));
299 }
300 return LDNS_WIREPARSE_ERR_OK;
301 }
302
303 /** put type, class, ttl into rr buffer */
304 static int
305 rrinternal_write_typeclassttl(sldns_buffer* strbuf, uint8_t* rr, size_t len,
306 size_t dname_len, uint16_t tp, uint16_t cl, uint32_t ttl, int question)
307 {
308 if(question) {
309 /* question is : name, type, class */
310 if(dname_len + 4 > len)
311 return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
312 sldns_buffer_position(strbuf));
313 sldns_write_uint16(rr+dname_len, tp);
314 sldns_write_uint16(rr+dname_len+2, cl);
315 return LDNS_WIREPARSE_ERR_OK;
316 }
317
318 /* type(2), class(2), ttl(4), rdatalen(2 (later)) = 10 */
319 if(dname_len + 10 > len)
320 return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
321 sldns_buffer_position(strbuf));
322 sldns_write_uint16(rr+dname_len, tp);
323 sldns_write_uint16(rr+dname_len+2, cl);
324 sldns_write_uint32(rr+dname_len+4, ttl);
325 sldns_write_uint16(rr+dname_len+8, 0); /* rdatalen placeholder */
326 return LDNS_WIREPARSE_ERR_OK;
327 }
328
329 /** find delimiters for type */
330 static const char*
331 rrinternal_get_delims(sldns_rdf_type rdftype, uint16_t r_cnt, uint16_t r_max)
332 {
333 switch(rdftype) {
334 case LDNS_RDF_TYPE_B64 :
335 case LDNS_RDF_TYPE_HEX : /* These rdf types may con- */
336 case LDNS_RDF_TYPE_LOC : /* tain whitespace, only if */
337 case LDNS_RDF_TYPE_WKS : /* it is the last rd field. */
338 case LDNS_RDF_TYPE_IPSECKEY :
339 case LDNS_RDF_TYPE_NSEC : if (r_cnt == r_max - 1) {
340 return "\n";
341 }
342 break;
343 default : break;
344 }
345 return "\n\t ";
346 }
347
348 /* Syntactic sugar for sldns_rr_new_frm_str_internal */
349 static int
350 sldns_rdf_type_maybe_quoted(sldns_rdf_type rdf_type)
351 {
352 return rdf_type == LDNS_RDF_TYPE_STR ||
353 rdf_type == LDNS_RDF_TYPE_LONG_STR;
354 }
355
356 /** see if rdata is quoted */
357 static int
358 rrinternal_get_quoted(sldns_buffer* strbuf, const char** delimiters,
359 sldns_rdf_type rdftype)
360 {
361 if(sldns_rdf_type_maybe_quoted(rdftype) &&
362 sldns_buffer_remaining(strbuf) > 0) {
363
364 /* skip spaces */
365 while(sldns_buffer_remaining(strbuf) > 0 &&
366 *(sldns_buffer_current(strbuf)) == ' ') {
367 sldns_buffer_skip(strbuf, 1);
368 }
369
370 if(sldns_buffer_remaining(strbuf) > 0 &&
371 *(sldns_buffer_current(strbuf)) == '\"') {
372 *delimiters = "\"\0";
373 sldns_buffer_skip(strbuf, 1);
374 return 1;
375 }
376 }
377 return 0;
378 }
379
380 /** spool hex data into rdata */
381 static int
382 rrinternal_spool_hex(char* token, uint8_t* rr, size_t rr_len,
383 size_t rr_cur_len, size_t* cur_hex_data_size, size_t hex_data_size)
384 {
385 char* p = token;
386 while(*p) {
387 if(isspace((unsigned char)*p)) {
388 p++;
389 continue;
390 }
391 if(!isxdigit((unsigned char)*p))
392 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_RDATA,
393 p-token);
394 if(*cur_hex_data_size >= hex_data_size)
395 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_RDATA,
396 p-token);
397 /* extra robust check */
398 if(rr_cur_len+(*cur_hex_data_size)/2 >= rr_len)
399 return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
400 p-token);
401 /* see if 16s or 1s */
402 if( ((*cur_hex_data_size)&1) == 0) {
403 rr[rr_cur_len+(*cur_hex_data_size)/2] =
404 (uint8_t)sldns_hexdigit_to_int(*p)*16;
405 } else {
406 rr[rr_cur_len+(*cur_hex_data_size)/2] +=
407 (uint8_t)sldns_hexdigit_to_int(*p);
408 }
409 p++;
410 (*cur_hex_data_size)++;
411 }
412 return LDNS_WIREPARSE_ERR_OK;
413 }
414
415 /** read unknown rr type format */
416 static int
417 rrinternal_parse_unknown(sldns_buffer* strbuf, char* token, size_t token_len,
418 uint8_t* rr, size_t* rr_len, size_t* rr_cur_len, size_t pre_data_pos)
419 {
420 const char* delim = "\n\t ";
421 size_t hex_data_size, cur_hex_data_size;
422 /* go back to before \#
423 * and skip it while setting delimiters better
424 */
425 sldns_buffer_set_position(strbuf, pre_data_pos);
426 if(sldns_bget_token(strbuf, token, delim, token_len) == -1)
427 return LDNS_WIREPARSE_ERR_GENERAL; /* should not fail */
428 /* read rdata octet length */
429 if(sldns_bget_token(strbuf, token, delim, token_len) == -1) {
430 /* something goes very wrong here */
431 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_RDATA,
432 sldns_buffer_position(strbuf));
433 }
434 hex_data_size = (size_t)atoi(token);
435 if(hex_data_size > LDNS_MAX_RDFLEN ||
436 *rr_cur_len + hex_data_size > *rr_len) {
437 return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
438 sldns_buffer_position(strbuf));
439 }
440 /* copy hex chars into hex str (2 chars per byte) */
441 hex_data_size *= 2;
442 cur_hex_data_size = 0;
443 while(cur_hex_data_size < hex_data_size) {
444 int status;
445 ssize_t c = sldns_bget_token(strbuf, token, delim, token_len);
446 if((status = rrinternal_spool_hex(token, rr, *rr_len,
447 *rr_cur_len, &cur_hex_data_size, hex_data_size)) != 0)
448 return RET_ERR_SHIFT(status,
449 sldns_buffer_position(strbuf)-strlen(token));
450 if(c == -1) {
451 if(cur_hex_data_size != hex_data_size)
452 return RET_ERR(
453 LDNS_WIREPARSE_ERR_SYNTAX_RDATA,
454 sldns_buffer_position(strbuf));
455 break;
456 }
457 }
458 *rr_cur_len += hex_data_size/2;
459 return LDNS_WIREPARSE_ERR_OK;
460 }
461
462 /** parse normal RR rdata element */
463 static int
464 rrinternal_parse_rdf(sldns_buffer* strbuf, char* token, size_t token_len,
465 uint8_t* rr, size_t rr_len, size_t* rr_cur_len, sldns_rdf_type rdftype,
466 uint16_t rr_type, uint16_t r_cnt, uint16_t r_max, size_t dname_len,
467 uint8_t* origin, size_t origin_len)
468 {
469 size_t len;
470 int status;
471
472 switch(rdftype) {
473 case LDNS_RDF_TYPE_DNAME:
474 /* check if the origin should be used or concatenated */
475 if(strcmp(token, "@") == 0) {
476 uint8_t* tocopy;
477 size_t copylen;
478 if(origin) {
479 copylen = origin_len;
480 tocopy = origin;
481 } else if(rr_type == LDNS_RR_TYPE_SOA) {
482 copylen = dname_len;
483 tocopy = rr; /* copy rr owner name */
484 } else {
485 copylen = 1;
486 tocopy = (uint8_t*)"\0";
487 }
488 if((*rr_cur_len) + copylen > rr_len)
489 return RET_ERR(
490 LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
491 sldns_buffer_position(strbuf));
492 memmove(rr+*rr_cur_len, tocopy, copylen);
493 (*rr_cur_len) += copylen;
494 } else {
495 size_t dlen = rr_len - (*rr_cur_len);
496 int s = sldns_str2wire_dname_buf_origin(token,
497 rr+*rr_cur_len, &dlen, origin, origin_len);
498 if(s) return RET_ERR_SHIFT(s,
499 sldns_buffer_position(strbuf)-strlen(token));
500 (*rr_cur_len) += dlen;
501 }
502 return LDNS_WIREPARSE_ERR_OK;
503
504 case LDNS_RDF_TYPE_HEX:
505 case LDNS_RDF_TYPE_B64:
506 /* When this is the last rdata field, then the
507 * rest should be read in (cause then these
508 * rdf types may contain spaces). */
509 if(r_cnt == r_max - 1) {
510 size_t tlen = strlen(token);
511 (void)sldns_bget_token(strbuf, token+tlen, "\n",
512 token_len - tlen);
513 }
514 break;
515 default:
516 break;
517 }
518
519 len = rr_len - (*rr_cur_len);
520 if((status=sldns_str2wire_rdf_buf(token, rr+(*rr_cur_len), &len,
521 rdftype)) != 0)
522 return RET_ERR_SHIFT(status,
523 sldns_buffer_position(strbuf)-strlen(token));
524 *rr_cur_len += len;
525 return LDNS_WIREPARSE_ERR_OK;
526 }
527
528 /**
529 * Parse one rdf token. Takes care of quotes and parenthesis.
530 */
531 static int
532 sldns_parse_rdf_token(sldns_buffer* strbuf, char* token, size_t token_len,
533 int* quoted, int* parens, size_t* pre_data_pos,
534 const char* delimiters, sldns_rdf_type rdftype, size_t* token_strlen)
535 {
536 size_t slen;
537
538 /* skip spaces */
539 while(sldns_buffer_remaining(strbuf) > 0 && !*quoted &&
540 *(sldns_buffer_current(strbuf)) == ' ') {
541 sldns_buffer_skip(strbuf, 1);
542 }
543
544 *pre_data_pos = sldns_buffer_position(strbuf);
545 if(sldns_bget_token_par(strbuf, token, (*quoted)?"\"":delimiters,
546 token_len, parens, (*quoted)?NULL:" \t") == -1) {
547 return 0;
548 }
549 slen = strlen(token);
550 /* check if not quoted yet, and we have encountered quotes */
551 if(!*quoted && sldns_rdf_type_maybe_quoted(rdftype) &&
552 slen >= 2 &&
553 (token[0] == '"' || token[0] == '\'') &&
554 (token[slen-1] == '"' || token[slen-1] == '\'')) {
555 /* move token two smaller (quotes) with endnull */
556 memmove(token, token+1, slen-2);
557 token[slen-2] = 0;
558 slen -= 2;
559 *quoted = 1;
560 } else if(!*quoted && sldns_rdf_type_maybe_quoted(rdftype) &&
561 slen >= 2 &&
562 (token[0] == '"' || token[0] == '\'')) {
563 /* got the start quote (remove it) but read remainder
564 * of quoted string as well into remainder of token */
565 memmove(token, token+1, slen-1);
566 token[slen-1] = 0;
567 slen -= 1;
568 *quoted = 1;
569 /* rewind buffer over skipped whitespace */
570 while(sldns_buffer_position(strbuf) > 0 &&
571 (sldns_buffer_current(strbuf)[-1] == ' ' ||
572 sldns_buffer_current(strbuf)[-1] == '\t')) {
573 sldns_buffer_skip(strbuf, -1);
574 }
575 if(sldns_bget_token_par(strbuf, token+slen,
576 "\"", token_len-slen,
577 parens, NULL) == -1) {
578 return 0;
579 }
580 slen = strlen(token);
581 }
582 *token_strlen = slen;
583 return 1;
584 }
585
586 /** Add space and one more rdf token onto the existing token string. */
587 static int
588 sldns_affix_token(sldns_buffer* strbuf, char* token, size_t* token_len,
589 int* quoted, int* parens, size_t* pre_data_pos,
590 const char* delimiters, sldns_rdf_type rdftype, size_t* token_strlen)
591 {
592 size_t addlen = *token_len - *token_strlen;
593 size_t addstrlen = 0;
594
595 /* add space */
596 if(addlen < 1) return 0;
597 token[*token_strlen] = ' ';
598 token[++(*token_strlen)] = 0;
599
600 /* read another token */
601 addlen = *token_len - *token_strlen;
602 if(!sldns_parse_rdf_token(strbuf, token+*token_strlen, addlen, quoted,
603 parens, pre_data_pos, delimiters, rdftype, &addstrlen))
604 return 0;
605 (*token_strlen) += addstrlen;
606 return 1;
607 }
608
609 /** parse rdata from string into rr buffer(-remainder after dname). */
610 static int
611 rrinternal_parse_rdata(sldns_buffer* strbuf, char* token, size_t token_len,
612 uint8_t* rr, size_t* rr_len, size_t dname_len, uint16_t rr_type,
613 uint8_t* origin, size_t origin_len)
614 {
615 const sldns_rr_descriptor *desc = sldns_rr_descript((uint16_t)rr_type);
616 uint16_t r_cnt, r_min, r_max;
617 size_t rr_cur_len = dname_len + 10, pre_data_pos, token_strlen;
618 int was_unknown_rr_format = 0, parens = 0, status, quoted;
619 const char* delimiters;
620 sldns_rdf_type rdftype;
621 /* a desc is always returned */
622 if(!desc) return LDNS_WIREPARSE_ERR_GENERAL;
623 r_max = sldns_rr_descriptor_maximum(desc);
624 r_min = sldns_rr_descriptor_minimum(desc);
625 /* robust check */
626 if(rr_cur_len > *rr_len)
627 return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
628 sldns_buffer_position(strbuf));
629
630 /* because number of fields can be variable, we can't rely on
631 * _maximum() only */
632 for(r_cnt=0; r_cnt < r_max; r_cnt++) {
633 rdftype = sldns_rr_descriptor_field_type(desc, r_cnt);
634 delimiters = rrinternal_get_delims(rdftype, r_cnt, r_max);
635 quoted = rrinternal_get_quoted(strbuf, &delimiters, rdftype);
636
637 if(!sldns_parse_rdf_token(strbuf, token, token_len, &quoted,
638 &parens, &pre_data_pos, delimiters, rdftype,
639 &token_strlen))
640 break;
641
642 /* rfc3597 specifies that any type can be represented
643 * with \# method, which can contain spaces...
644 * it does specify size though... */
645
646 /* unknown RR data */
647 if(token_strlen>=2 && strncmp(token, "\\#", 2) == 0 &&
648 !quoted && (token_strlen == 2 || token[2]==' ')) {
649 was_unknown_rr_format = 1;
650 if((status=rrinternal_parse_unknown(strbuf, token,
651 token_len, rr, rr_len, &rr_cur_len,
652 pre_data_pos)) != 0)
653 return status;
654 } else if(token_strlen > 0 || quoted) {
655 if(rdftype == LDNS_RDF_TYPE_HIP) {
656 /* affix the HIT and PK fields, with a space */
657 if(!sldns_affix_token(strbuf, token,
658 &token_len, &quoted, &parens,
659 &pre_data_pos, delimiters,
660 rdftype, &token_strlen))
661 break;
662 if(!sldns_affix_token(strbuf, token,
663 &token_len, &quoted, &parens,
664 &pre_data_pos, delimiters,
665 rdftype, &token_strlen))
666 break;
667 }
668
669 /* normal RR */
670 if((status=rrinternal_parse_rdf(strbuf, token,
671 token_len, rr, *rr_len, &rr_cur_len, rdftype,
672 rr_type, r_cnt, r_max, dname_len, origin,
673 origin_len)) != 0) {
674 return status;
675 }
676 }
677 }
678 if(!was_unknown_rr_format && r_cnt+1 < r_min) {
679 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_MISSING_VALUE,
680 sldns_buffer_position(strbuf));
681 }
682 while(parens != 0) {
683 /* read remainder, must be "" */
684 if(sldns_bget_token_par(strbuf, token, "\n", token_len,
685 &parens, " \t") == -1) {
686 if(parens != 0)
687 return RET_ERR(LDNS_WIREPARSE_ERR_PARENTHESIS,
688 sldns_buffer_position(strbuf));
689 break;
690 }
691 if(strcmp(token, "") != 0)
692 return RET_ERR(LDNS_WIREPARSE_ERR_PARENTHESIS,
693 sldns_buffer_position(strbuf));
694 }
695 /* write rdata length */
696 sldns_write_uint16(rr+dname_len+8, rr_cur_len-dname_len-10);
697 *rr_len = rr_cur_len;
698 return LDNS_WIREPARSE_ERR_OK;
699 }
700
701 /*
702 * trailing spaces are allowed
703 * leading spaces are not allowed
704 * allow ttl to be optional
705 * class is optional too
706 * if ttl is missing, and default_ttl is 0, use DEF_TTL
707 * allow ttl to be written as 1d3h
708 * So the RR should look like. e.g.
709 * miek.nl. 3600 IN MX 10 elektron.atoom.net
710 * or
711 * miek.nl. 1h IN MX 10 elektron.atoom.net
712 * or
713 * miek.nl. IN MX 10 elektron.atoom.net
714 */
715 static int
716 sldns_str2wire_rr_buf_internal(const char* str, uint8_t* rr, size_t* len,
717 size_t* dname_len, uint32_t default_ttl, uint8_t* origin,
718 size_t origin_len, uint8_t* prev, size_t prev_len, int question)
719 {
720 int status;
721 int not_there = 0;
722 char token[LDNS_MAX_RDFLEN+1];
723 uint32_t ttl = 0;
724 uint16_t tp = 0, cl = 0;
725 size_t ddlen = 0;
726
727 /* string in buffer */
728 sldns_buffer strbuf;
729 sldns_buffer_init_frm_data(&strbuf, (uint8_t*)str, strlen(str));
730 if(!dname_len) dname_len = &ddlen;
731
732 /* parse the owner */
733 if((status=rrinternal_get_owner(&strbuf, rr, len, dname_len, origin,
734 origin_len, prev, prev_len, token, sizeof(token))) != 0)
735 return status;
736
737 /* parse the [ttl] [class] <type> */
738 if((status=rrinternal_get_ttl(&strbuf, token, sizeof(token),
739 &not_there, &ttl, default_ttl)) != 0)
740 return status;
741 if((status=rrinternal_get_class(&strbuf, token, sizeof(token),
742 &not_there, &cl)) != 0)
743 return status;
744 if((status=rrinternal_get_type(&strbuf, token, sizeof(token),
745 &not_there, &tp)) != 0)
746 return status;
747 /* put ttl, class, type into the rr result */
748 if((status=rrinternal_write_typeclassttl(&strbuf, rr, *len, *dname_len, tp, cl,
749 ttl, question)) != 0)
750 return status;
751 /* for a question-RR we are done, no rdata */
752 if(question) {
753 *len = *dname_len + 4;
754 return LDNS_WIREPARSE_ERR_OK;
755 }
756
757 /* rdata */
758 if((status=rrinternal_parse_rdata(&strbuf, token, sizeof(token),
759 rr, len, *dname_len, tp, origin, origin_len)) != 0)
760 return status;
761
762 return LDNS_WIREPARSE_ERR_OK;
763 }
764
765 int sldns_str2wire_rr_buf(const char* str, uint8_t* rr, size_t* len,
766 size_t* dname_len, uint32_t default_ttl, uint8_t* origin,
767 size_t origin_len, uint8_t* prev, size_t prev_len)
768 {
769 return sldns_str2wire_rr_buf_internal(str, rr, len, dname_len,
770 default_ttl, origin, origin_len, prev, prev_len, 0);
771 }
772
773 int sldns_str2wire_rr_question_buf(const char* str, uint8_t* rr, size_t* len,
774 size_t* dname_len, uint8_t* origin, size_t origin_len, uint8_t* prev,
775 size_t prev_len)
776 {
777 return sldns_str2wire_rr_buf_internal(str, rr, len, dname_len,
778 0, origin, origin_len, prev, prev_len, 1);
779 }
780
781 uint16_t sldns_wirerr_get_type(uint8_t* rr, size_t len, size_t dname_len)
782 {
783 if(len < dname_len+2)
784 return 0;
785 return sldns_read_uint16(rr+dname_len);
786 }
787
788 uint16_t sldns_wirerr_get_class(uint8_t* rr, size_t len, size_t dname_len)
789 {
790 if(len < dname_len+4)
791 return 0;
792 return sldns_read_uint16(rr+dname_len+2);
793 }
794
795 uint32_t sldns_wirerr_get_ttl(uint8_t* rr, size_t len, size_t dname_len)
796 {
797 if(len < dname_len+8)
798 return 0;
799 return sldns_read_uint32(rr+dname_len+4);
800 }
801
802 uint16_t sldns_wirerr_get_rdatalen(uint8_t* rr, size_t len, size_t dname_len)
803 {
804 if(len < dname_len+10)
805 return 0;
806 return sldns_read_uint16(rr+dname_len+8);
807 }
808
809 uint8_t* sldns_wirerr_get_rdata(uint8_t* rr, size_t len, size_t dname_len)
810 {
811 if(len < dname_len+10)
812 return NULL;
813 return rr+dname_len+10;
814 }
815
816 uint8_t* sldns_wirerr_get_rdatawl(uint8_t* rr, size_t len, size_t dname_len)
817 {
818 if(len < dname_len+10)
819 return NULL;
820 return rr+dname_len+8;
821 }
822
823 const char* sldns_get_errorstr_parse(int e)
824 {
825 sldns_lookup_table *lt;
826 lt = sldns_lookup_by_id(sldns_wireparse_errors, LDNS_WIREPARSE_ERROR(e));
827 return lt?lt->name:"unknown error";
828 }
829
830 /* Strip whitespace from the start and the end of <line>. */
831 static char *
832 sldns_strip_ws(char *line)
833 {
834 char *s = line, *e;
835
836 for (s = line; *s && isspace((unsigned char)*s); s++)
837 ;
838 for (e = strchr(s, 0); e > s+2 && isspace((unsigned char)e[-1]) && e[-2] != '\\'; e--)
839 ;
840 *e = 0;
841 return s;
842 }
843
844 int sldns_fp2wire_rr_buf(FILE* in, uint8_t* rr, size_t* len, size_t* dname_len,
845 struct sldns_file_parse_state* parse_state)
846 {
847 char line[LDNS_RR_BUF_SIZE+1];
848 ssize_t size;
849
850 /* read an entire line in from the file */
851 if((size = sldns_fget_token_l(in, line, LDNS_PARSE_SKIP_SPACE,
852 LDNS_RR_BUF_SIZE, parse_state?&parse_state->lineno:NULL))
853 == -1) {
854 /* if last line was empty, we are now at feof, which is not
855 * always a parse error (happens when for instance last line
856 * was a comment)
857 */
858 return LDNS_WIREPARSE_ERR_SYNTAX;
859 }
860
861 /* we can have the situation, where we've read ok, but still got
862 * no bytes to play with, in this case size is 0 */
863 if(size == 0) {
864 *len = 0;
865 *dname_len = 0;
866 return LDNS_WIREPARSE_ERR_OK;
867 }
868
869 if(strncmp(line, "$ORIGIN", 7) == 0 && isspace((unsigned char)line[7])) {
870 int s;
871 *len = 0;
872 *dname_len = 0;
873 if(!parse_state) return LDNS_WIREPARSE_ERR_OK;
874 parse_state->origin_len = sizeof(parse_state->origin);
875 s = sldns_str2wire_dname_buf(sldns_strip_ws(line+8),
876 parse_state->origin, &parse_state->origin_len);
877 if(s) parse_state->origin_len = 0;
878 return s;
879 } else if(strncmp(line, "$TTL", 4) == 0 && isspace((unsigned char)line[4])) {
880 const char* end = NULL;
881 *len = 0;
882 *dname_len = 0;
883 if(!parse_state) return LDNS_WIREPARSE_ERR_OK;
884 parse_state->default_ttl = sldns_str2period(
885 sldns_strip_ws(line+5), &end);
886 } else if (strncmp(line, "$INCLUDE", 8) == 0) {
887 *len = 0;
888 *dname_len = 0;
889 return LDNS_WIREPARSE_ERR_INCLUDE;
890 } else {
891 return sldns_str2wire_rr_buf(line, rr, len, dname_len,
892 parse_state?parse_state->default_ttl:0,
893 (parse_state&&parse_state->origin_len)?
894 parse_state->origin:NULL,
895 parse_state->origin_len,
896 (parse_state&&parse_state->prev_rr_len)?
897 parse_state->prev_rr:NULL,
898 parse_state->prev_rr_len);
899 }
900 return LDNS_WIREPARSE_ERR_OK;
901 }
902
903 int sldns_str2wire_rdf_buf(const char* str, uint8_t* rd, size_t* len,
904 sldns_rdf_type rdftype)
905 {
906 switch (rdftype) {
907 case LDNS_RDF_TYPE_DNAME:
908 return sldns_str2wire_dname_buf(str, rd, len);
909 case LDNS_RDF_TYPE_INT8:
910 return sldns_str2wire_int8_buf(str, rd, len);
911 case LDNS_RDF_TYPE_INT16:
912 return sldns_str2wire_int16_buf(str, rd, len);
913 case LDNS_RDF_TYPE_INT32:
914 return sldns_str2wire_int32_buf(str, rd, len);
915 case LDNS_RDF_TYPE_A:
916 return sldns_str2wire_a_buf(str, rd, len);
917 case LDNS_RDF_TYPE_AAAA:
918 return sldns_str2wire_aaaa_buf(str, rd, len);
919 case LDNS_RDF_TYPE_STR:
920 return sldns_str2wire_str_buf(str, rd, len);
921 case LDNS_RDF_TYPE_APL:
922 return sldns_str2wire_apl_buf(str, rd, len);
923 case LDNS_RDF_TYPE_B64:
924 return sldns_str2wire_b64_buf(str, rd, len);
925 case LDNS_RDF_TYPE_B32_EXT:
926 return sldns_str2wire_b32_ext_buf(str, rd, len);
927 case LDNS_RDF_TYPE_HEX:
928 return sldns_str2wire_hex_buf(str, rd, len);
929 case LDNS_RDF_TYPE_NSEC:
930 return sldns_str2wire_nsec_buf(str, rd, len);
931 case LDNS_RDF_TYPE_TYPE:
932 return sldns_str2wire_type_buf(str, rd, len);
933 case LDNS_RDF_TYPE_CLASS:
934 return sldns_str2wire_class_buf(str, rd, len);
935 case LDNS_RDF_TYPE_CERT_ALG:
936 return sldns_str2wire_cert_alg_buf(str, rd, len);
937 case LDNS_RDF_TYPE_ALG:
938 return sldns_str2wire_alg_buf(str, rd, len);
939 case LDNS_RDF_TYPE_TIME:
940 return sldns_str2wire_time_buf(str, rd, len);
941 case LDNS_RDF_TYPE_PERIOD:
942 return sldns_str2wire_period_buf(str, rd, len);
943 case LDNS_RDF_TYPE_LOC:
944 return sldns_str2wire_loc_buf(str, rd, len);
945 case LDNS_RDF_TYPE_WKS:
946 return sldns_str2wire_wks_buf(str, rd, len);
947 case LDNS_RDF_TYPE_NSAP:
948 return sldns_str2wire_nsap_buf(str, rd, len);
949 case LDNS_RDF_TYPE_ATMA:
950 return sldns_str2wire_atma_buf(str, rd, len);
951 case LDNS_RDF_TYPE_IPSECKEY:
952 return sldns_str2wire_ipseckey_buf(str, rd, len);
953 case LDNS_RDF_TYPE_NSEC3_SALT:
954 return sldns_str2wire_nsec3_salt_buf(str, rd, len);
955 case LDNS_RDF_TYPE_NSEC3_NEXT_OWNER:
956 return sldns_str2wire_b32_ext_buf(str, rd, len);
957 case LDNS_RDF_TYPE_ILNP64:
958 return sldns_str2wire_ilnp64_buf(str, rd, len);
959 case LDNS_RDF_TYPE_EUI48:
960 return sldns_str2wire_eui48_buf(str, rd, len);
961 case LDNS_RDF_TYPE_EUI64:
962 return sldns_str2wire_eui64_buf(str, rd, len);
963 case LDNS_RDF_TYPE_TAG:
964 return sldns_str2wire_tag_buf(str, rd, len);
965 case LDNS_RDF_TYPE_LONG_STR:
966 return sldns_str2wire_long_str_buf(str, rd, len);
967 case LDNS_RDF_TYPE_HIP:
968 return sldns_str2wire_hip_buf(str, rd, len);
969 case LDNS_RDF_TYPE_INT16_DATA:
970 return sldns_str2wire_int16_data_buf(str, rd, len);
971 case LDNS_RDF_TYPE_UNKNOWN:
972 case LDNS_RDF_TYPE_SERVICE:
973 return LDNS_WIREPARSE_ERR_NOT_IMPL;
974 case LDNS_RDF_TYPE_NONE:
975 default:
976 break;
977 }
978 return LDNS_WIREPARSE_ERR_GENERAL;
979 }
980
981 int sldns_str2wire_int8_buf(const char* str, uint8_t* rd, size_t* len)
982 {
983 char* end;
984 uint8_t r = (uint8_t)strtol((char*)str, &end, 10);
985 if(*end != 0)
986 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_INT, end-(char*)str);
987 if(*len < 1)
988 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
989 rd[0] = r;
990 *len = 1;
991 return LDNS_WIREPARSE_ERR_OK;
992 }
993
994 int sldns_str2wire_int16_buf(const char* str, uint8_t* rd, size_t* len)
995 {
996 char* end;
997 uint16_t r = (uint16_t)strtol((char*)str, &end, 10);
998 if(*end != 0)
999 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_INT, end-(char*)str);
1000 if(*len < 2)
1001 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1002 sldns_write_uint16(rd, r);
1003 *len = 2;
1004 return LDNS_WIREPARSE_ERR_OK;
1005 }
1006
1007 int sldns_str2wire_int32_buf(const char* str, uint8_t* rd, size_t* len)
1008 {
1009 char* end;
1010 uint32_t r;
1011 errno = 0; /* must set to zero before call,
1012 note race condition on errno */
1013 if(*str == '-')
1014 r = (uint32_t)strtol((char*)str, &end, 10);
1015 else r = (uint32_t)strtoul((char*)str, &end, 10);
1016 if(*end != 0)
1017 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_INT, end-(char*)str);
1018 if(errno == ERANGE)
1019 return LDNS_WIREPARSE_ERR_SYNTAX_INTEGER_OVERFLOW;
1020 if(*len < 4)
1021 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1022 sldns_write_uint32(rd, r);
1023 *len = 4;
1024 return LDNS_WIREPARSE_ERR_OK;
1025 }
1026
1027 int sldns_str2wire_a_buf(const char* str, uint8_t* rd, size_t* len)
1028 {
1029 struct in_addr address;
1030 if(inet_pton(AF_INET, (char*)str, &address) != 1)
1031 return LDNS_WIREPARSE_ERR_SYNTAX_IP4;
1032 if(*len < sizeof(address))
1033 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1034 memmove(rd, &address, sizeof(address));
1035 *len = sizeof(address);
1036 return LDNS_WIREPARSE_ERR_OK;
1037 }
1038
1039 int sldns_str2wire_aaaa_buf(const char* str, uint8_t* rd, size_t* len)
1040 {
1041 #ifdef AF_INET6
1042 uint8_t address[LDNS_IP6ADDRLEN + 1];
1043 if(inet_pton(AF_INET6, (char*)str, address) != 1)
1044 return LDNS_WIREPARSE_ERR_SYNTAX_IP6;
1045 if(*len < LDNS_IP6ADDRLEN)
1046 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1047 memmove(rd, address, LDNS_IP6ADDRLEN);
1048 *len = LDNS_IP6ADDRLEN;
1049 return LDNS_WIREPARSE_ERR_OK;
1050 #else
1051 return LDNS_WIREPARSE_ERR_NOT_IMPL;
1052 #endif
1053 }
1054
1055 int sldns_str2wire_str_buf(const char* str, uint8_t* rd, size_t* len)
1056 {
1057 uint8_t ch = 0;
1058 size_t sl = 0;
1059 const char* s = str;
1060 /* skip length byte */
1061 if(*len < 1)
1062 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1063
1064 /* read characters */
1065 while(sldns_parse_char(&ch, &s)) {
1066 if(sl >= 255)
1067 return RET_ERR(LDNS_WIREPARSE_ERR_INVALID_STR, s-str);
1068 if(*len < sl+1)
1069 return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
1070 s-str);
1071 rd[++sl] = ch;
1072 }
1073 if(!s)
1074 return LDNS_WIREPARSE_ERR_SYNTAX_BAD_ESCAPE;
1075 rd[0] = (uint8_t)sl;
1076 *len = sl+1;
1077 return LDNS_WIREPARSE_ERR_OK;
1078 }
1079
1080 int sldns_str2wire_apl_buf(const char* str, uint8_t* rd, size_t* len)
1081 {
1082 const char *my_str = str;
1083
1084 char my_ip_str[64];
1085 size_t ip_str_len;
1086
1087 uint16_t family;
1088 int negation;
1089 size_t adflength = 0;
1090 uint8_t data[16+4];
1091 uint8_t prefix;
1092 size_t i;
1093
1094 if(strlen(my_str) == 0) {
1095 /* empty APL element, no data, no string */
1096 *len = 0;
1097 return LDNS_WIREPARSE_ERR_OK;
1098 }
1099
1100 /* [!]afi:address/prefix */
1101 if (strlen(my_str) < 2
1102 || strchr(my_str, ':') == NULL
1103 || strchr(my_str, '/') == NULL
1104 || strchr(my_str, ':') > strchr(my_str, '/')) {
1105 return LDNS_WIREPARSE_ERR_INVALID_STR;
1106 }
1107
1108 if (my_str[0] == '!') {
1109 negation = 1;
1110 my_str += 1;
1111 } else {
1112 negation = 0;
1113 }
1114
1115 family = (uint16_t) atoi(my_str);
1116
1117 my_str = strchr(my_str, ':') + 1;
1118
1119 /* need ip addr and only ip addr for inet_pton */
1120 ip_str_len = (size_t) (strchr(my_str, '/') - my_str);
1121 if(ip_str_len+1 > sizeof(my_ip_str))
1122 return LDNS_WIREPARSE_ERR_INVALID_STR;
1123 (void)strlcpy(my_ip_str, my_str, sizeof(my_ip_str));
1124 my_ip_str[ip_str_len] = 0;
1125
1126 if (family == 1) {
1127 /* ipv4 */
1128 if(inet_pton(AF_INET, my_ip_str, data+4) == 0)
1129 return LDNS_WIREPARSE_ERR_INVALID_STR;
1130 for (i = 0; i < 4; i++) {
1131 if (data[i+4] != 0) {
1132 adflength = i + 1;
1133 }
1134 }
1135 } else if (family == 2) {
1136 /* ipv6 */
1137 if (inet_pton(AF_INET6, my_ip_str, data+4) == 0)
1138 return LDNS_WIREPARSE_ERR_INVALID_STR;
1139 for (i = 0; i < 16; i++) {
1140 if (data[i+4] != 0) {
1141 adflength = i + 1;
1142 }
1143 }
1144 } else {
1145 /* unknown family */
1146 return LDNS_WIREPARSE_ERR_INVALID_STR;
1147 }
1148
1149 my_str = strchr(my_str, '/') + 1;
1150 prefix = (uint8_t) atoi(my_str);
1151
1152 sldns_write_uint16(data, family);
1153 data[2] = prefix;
1154 data[3] = (uint8_t)adflength;
1155 if (negation) {
1156 /* set bit 1 of byte 3 */
1157 data[3] = data[3] | 0x80;
1158 }
1159
1160 if(*len < 4+adflength)
1161 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1162 memmove(rd, data, 4+adflength);
1163 *len = 4+adflength;
1164 return LDNS_WIREPARSE_ERR_OK;
1165 }
1166
1167 int sldns_str2wire_b64_buf(const char* str, uint8_t* rd, size_t* len)
1168 {
1169 size_t sz = sldns_b64_pton_calculate_size(strlen(str));
1170 int n;
1171 if(*len < sz)
1172 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1173 n = sldns_b64_pton(str, rd, *len);
1174 if(n < 0)
1175 return LDNS_WIREPARSE_ERR_SYNTAX_B64;
1176 *len = (size_t)n;
1177 return LDNS_WIREPARSE_ERR_OK;
1178 }
1179
1180 int sldns_str2wire_b32_ext_buf(const char* str, uint8_t* rd, size_t* len)
1181 {
1182 size_t slen = strlen(str);
1183 size_t sz = sldns_b32_pton_calculate_size(slen);
1184 int n;
1185 if(*len < 1+sz)
1186 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1187 rd[0] = (uint8_t)sz;
1188 n = sldns_b32_pton_extended_hex(str, slen, rd+1, *len-1);
1189 if(n < 0)
1190 return LDNS_WIREPARSE_ERR_SYNTAX_B32_EXT;
1191 *len = (size_t)n+1;
1192 return LDNS_WIREPARSE_ERR_OK;
1193 }
1194
1195 int sldns_str2wire_hex_buf(const char* str, uint8_t* rd, size_t* len)
1196 {
1197 const char* s = str;
1198 size_t dlen = 0; /* number of hexdigits parsed */
1199 while(*s) {
1200 if(isspace((unsigned char)*s)) {
1201 s++;
1202 continue;
1203 }
1204 if(!isxdigit((unsigned char)*s))
1205 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_HEX, s-str);
1206 if(*len < dlen/2 + 1)
1207 return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
1208 s-str);
1209 if((dlen&1)==0)
1210 rd[dlen/2] = (uint8_t)sldns_hexdigit_to_int(*s++) * 16;
1211 else rd[dlen/2] += (uint8_t)sldns_hexdigit_to_int(*s++);
1212 dlen++;
1213 }
1214 if((dlen&1)!=0)
1215 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_HEX, s-str);
1216 *len = dlen/2;
1217 return LDNS_WIREPARSE_ERR_OK;
1218 }
1219
1220 int sldns_str2wire_nsec_buf(const char* str, uint8_t* rd, size_t* len)
1221 {
1222 const char *delim = "\n\t ";
1223 char token[64]; /* for a type name */
1224 size_t type_count = 0;
1225 int block;
1226 size_t used = 0;
1227 uint16_t maxtype = 0;
1228 uint8_t typebits[8192]; /* 65536 bits */
1229 uint8_t window_in_use[256];
1230
1231 /* string in buffer */
1232 sldns_buffer strbuf;
1233 sldns_buffer_init_frm_data(&strbuf, (uint8_t*)str, strlen(str));
1234
1235 /* parse the types */
1236 memset(typebits, 0, sizeof(typebits));
1237 memset(window_in_use, 0, sizeof(window_in_use));
1238 while(sldns_buffer_remaining(&strbuf) > 0 &&
1239 sldns_bget_token(&strbuf, token, delim, sizeof(token)) != -1) {
1240 uint16_t t = sldns_get_rr_type_by_name(token);
1241 if(token[0] == 0)
1242 continue;
1243 if(t == 0 && strcmp(token, "TYPE0") != 0)
1244 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_TYPE,
1245 sldns_buffer_position(&strbuf));
1246 typebits[t/8] |= (0x80>>(t%8));
1247 window_in_use[t/256] = 1;
1248 type_count++;
1249 if(t > maxtype) maxtype = t;
1250 }
1251
1252 /* empty NSEC bitmap */
1253 if(type_count == 0) {
1254 *len = 0;
1255 return LDNS_WIREPARSE_ERR_OK;
1256 }
1257
1258 /* encode windows {u8 windowblock, u8 bitmaplength, 0-32u8 bitmap},
1259 * block is 0-255 upper octet of types, length if 0-32. */
1260 for(block = 0; block <= (int)maxtype/256; block++) {
1261 int i, blocklen = 0;
1262 if(!window_in_use[block])
1263 continue;
1264 for(i=0; i<32; i++) {
1265 if(typebits[block*32+i] != 0)
1266 blocklen = i+1;
1267 }
1268 if(blocklen == 0)
1269 continue; /* empty window should have been !in_use */
1270 if(used+blocklen+2 > *len)
1271 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1272 rd[used+0] = (uint8_t)block;
1273 rd[used+1] = (uint8_t)blocklen;
1274 for(i=0; i<blocklen; i++) {
1275 rd[used+2+i] = typebits[block*32+i];
1276 }
1277 used += blocklen+2;
1278 }
1279 *len = used;
1280 return LDNS_WIREPARSE_ERR_OK;
1281 }
1282
1283 int sldns_str2wire_type_buf(const char* str, uint8_t* rd, size_t* len)
1284 {
1285 uint16_t t = sldns_get_rr_type_by_name(str);
1286 if(t == 0 && strcmp(str, "TYPE0") != 0)
1287 return LDNS_WIREPARSE_ERR_SYNTAX_TYPE;
1288 if(*len < 2)
1289 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1290 sldns_write_uint16(rd, t);
1291 *len = 2;
1292 return LDNS_WIREPARSE_ERR_OK;
1293 }
1294
1295 int sldns_str2wire_class_buf(const char* str, uint8_t* rd, size_t* len)
1296 {
1297 uint16_t c = sldns_get_rr_class_by_name(str);
1298 if(c == 0 && strcmp(str, "CLASS0") != 0)
1299 return LDNS_WIREPARSE_ERR_SYNTAX_CLASS;
1300 if(*len < 2)
1301 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1302 sldns_write_uint16(rd, c);
1303 *len = 2;
1304 return LDNS_WIREPARSE_ERR_OK;
1305 }
1306
1307 /* An certificate alg field can either be specified as a 8 bits number
1308 * or by its symbolic name. Handle both */
1309 int sldns_str2wire_cert_alg_buf(const char* str, uint8_t* rd, size_t* len)
1310 {
1311 sldns_lookup_table *lt = sldns_lookup_by_name(sldns_cert_algorithms,
1312 str);
1313 if(*len < 2)
1314 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1315 if(lt) {
1316 sldns_write_uint16(rd, (uint16_t)lt->id);
1317 } else {
1318 int s = sldns_str2wire_int16_buf(str, rd, len);
1319 if(s) return s;
1320 if(sldns_read_uint16(rd) == 0)
1321 return LDNS_WIREPARSE_ERR_CERT_BAD_ALGORITHM;
1322 }
1323 *len = 2;
1324 return LDNS_WIREPARSE_ERR_OK;
1325 }
1326
1327 /* An alg field can either be specified as a 8 bits number
1328 * or by its symbolic name. Handle both */
1329 int sldns_str2wire_alg_buf(const char* str, uint8_t* rd, size_t* len)
1330 {
1331 sldns_lookup_table *lt = sldns_lookup_by_name(sldns_algorithms, str);
1332 if(*len < 1)
1333 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1334 if(lt) {
1335 rd[0] = (uint8_t)lt->id;
1336 *len = 1;
1337 } else {
1338 /* try as-is (a number) */
1339 return sldns_str2wire_int8_buf(str, rd, len);
1340 }
1341 return LDNS_WIREPARSE_ERR_OK;
1342 }
1343
1344 int sldns_str2wire_time_buf(const char* str, uint8_t* rd, size_t* len)
1345 {
1346 /* convert a time YYYYDDMMHHMMSS to wireformat */
1347 struct tm tm;
1348 if(*len < 4)
1349 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1350
1351 /* Try to scan the time... */
1352 memset(&tm, 0, sizeof(tm));
1353 if (strlen(str) == 14 && sscanf(str, "%4d%2d%2d%2d%2d%2d",
1354 &tm.tm_year, &tm.tm_mon, &tm.tm_mday, &tm.tm_hour,
1355 &tm.tm_min, &tm.tm_sec) == 6) {
1356 tm.tm_year -= 1900;
1357 tm.tm_mon--;
1358 /* Check values */
1359 if (tm.tm_year < 70)
1360 return LDNS_WIREPARSE_ERR_SYNTAX_TIME;
1361 if (tm.tm_mon < 0 || tm.tm_mon > 11)
1362 return LDNS_WIREPARSE_ERR_SYNTAX_TIME;
1363 if (tm.tm_mday < 1 || tm.tm_mday > 31)
1364 return LDNS_WIREPARSE_ERR_SYNTAX_TIME;
1365 if (tm.tm_hour < 0 || tm.tm_hour > 23)
1366 return LDNS_WIREPARSE_ERR_SYNTAX_TIME;
1367 if (tm.tm_min < 0 || tm.tm_min > 59)
1368 return LDNS_WIREPARSE_ERR_SYNTAX_TIME;
1369 if (tm.tm_sec < 0 || tm.tm_sec > 59)
1370 return LDNS_WIREPARSE_ERR_SYNTAX_TIME;
1371
1372 sldns_write_uint32(rd, sldns_mktime_from_utc(&tm));
1373 } else {
1374 /* handle it as 32 bits timestamp */
1375 char *end;
1376 uint32_t l = (uint32_t)strtol((char*)str, &end, 10);
1377 if(*end != 0)
1378 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_TIME,
1379 end-(char*)str);
1380 sldns_write_uint32(rd, l);
1381 }
1382 *len = 4;
1383 return LDNS_WIREPARSE_ERR_OK;
1384 }
1385
1386 int sldns_str2wire_period_buf(const char* str, uint8_t* rd, size_t* len)
1387 {
1388 const char* end;
1389 uint32_t p = sldns_str2period(str, &end);
1390 if(*end != 0)
1391 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_PERIOD, end-str);
1392 if(*len < 4)
1393 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1394 sldns_write_uint32(rd, p);
1395 *len = 4;
1396 return LDNS_WIREPARSE_ERR_OK;
1397 }
1398
1399 /** read "<digits>[.<digits>][mM]" into mantissa exponent format for LOC type */
1400 static int
1401 loc_parse_cm(char* my_str, char** endstr, uint8_t* m, uint8_t* e)
1402 {
1403 uint32_t meters = 0, cm = 0, val;
1404 while (isblank((unsigned char)*my_str)) {
1405 my_str++;
1406 }
1407 meters = (uint32_t)strtol(my_str, &my_str, 10);
1408 if (*my_str == '.') {
1409 my_str++;
1410 cm = (uint32_t)strtol(my_str, &my_str, 10);
1411 }
1412 if (meters >= 1) {
1413 *e = 2;
1414 val = meters;
1415 } else {
1416 *e = 0;
1417 val = cm;
1418 }
1419 while(val >= 10) {
1420 (*e)++;
1421 val /= 10;
1422 }
1423 *m = (uint8_t)val;
1424
1425 if (*e > 9)
1426 return 0;
1427 if (*my_str == 'm' || *my_str == 'M') {
1428 my_str++;
1429 }
1430 *endstr = my_str;
1431 return 1;
1432 }
1433
1434 int sldns_str2wire_loc_buf(const char* str, uint8_t* rd, size_t* len)
1435 {
1436 uint32_t latitude = 0;
1437 uint32_t longitude = 0;
1438 uint32_t altitude = 0;
1439
1440 uint32_t equator = (uint32_t)1<<31; /* 2**31 */
1441
1442 /* only support version 0 */
1443 uint32_t h = 0;
1444 uint32_t m = 0;
1445 uint8_t size_b = 1, size_e = 2;
1446 uint8_t horiz_pre_b = 1, horiz_pre_e = 6;
1447 uint8_t vert_pre_b = 1, vert_pre_e = 3;
1448
1449 double s = 0.0;
1450 int northerness;
1451 int easterness;
1452
1453 char *my_str = (char *) str;
1454
1455 if (isdigit((unsigned char) *my_str)) {
1456 h = (uint32_t) strtol(my_str, &my_str, 10);
1457 } else {
1458 return LDNS_WIREPARSE_ERR_INVALID_STR;
1459 }
1460
1461 while (isblank((unsigned char) *my_str)) {
1462 my_str++;
1463 }
1464
1465 if (isdigit((unsigned char) *my_str)) {
1466 m = (uint32_t) strtol(my_str, &my_str, 10);
1467 } else if (*my_str == 'N' || *my_str == 'S') {
1468 goto north;
1469 } else {
1470 return LDNS_WIREPARSE_ERR_INVALID_STR;
1471 }
1472
1473 while (isblank((unsigned char) *my_str)) {
1474 my_str++;
1475 }
1476
1477 if (isdigit((unsigned char) *my_str)) {
1478 s = strtod(my_str, &my_str);
1479 }
1480
1481 /* skip blanks before norterness */
1482 while (isblank((unsigned char) *my_str)) {
1483 my_str++;
1484 }
1485
1486 north:
1487 if (*my_str == 'N') {
1488 northerness = 1;
1489 } else if (*my_str == 'S') {
1490 northerness = 0;
1491 } else {
1492 return LDNS_WIREPARSE_ERR_INVALID_STR;
1493 }
1494
1495 my_str++;
1496
1497 /* store number */
1498 s = 1000.0 * s;
1499 /* add a little to make floor in conversion a round */
1500 s += 0.0005;
1501 latitude = (uint32_t) s;
1502 latitude += 1000 * 60 * m;
1503 latitude += 1000 * 60 * 60 * h;
1504 if (northerness) {
1505 latitude = equator + latitude;
1506 } else {
1507 latitude = equator - latitude;
1508 }
1509 while (isblank((unsigned char)*my_str)) {
1510 my_str++;
1511 }
1512
1513 if (isdigit((unsigned char) *my_str)) {
1514 h = (uint32_t) strtol(my_str, &my_str, 10);
1515 } else {
1516 return LDNS_WIREPARSE_ERR_INVALID_STR;
1517 }
1518
1519 while (isblank((unsigned char) *my_str)) {
1520 my_str++;
1521 }
1522
1523 if (isdigit((unsigned char) *my_str)) {
1524 m = (uint32_t) strtol(my_str, &my_str, 10);
1525 } else if (*my_str == 'E' || *my_str == 'W') {
1526 goto east;
1527 } else {
1528 return LDNS_WIREPARSE_ERR_INVALID_STR;
1529 }
1530
1531 while (isblank((unsigned char)*my_str)) {
1532 my_str++;
1533 }
1534
1535 if (isdigit((unsigned char) *my_str)) {
1536 s = strtod(my_str, &my_str);
1537 }
1538
1539 /* skip blanks before easterness */
1540 while (isblank((unsigned char)*my_str)) {
1541 my_str++;
1542 }
1543
1544 east:
1545 if (*my_str == 'E') {
1546 easterness = 1;
1547 } else if (*my_str == 'W') {
1548 easterness = 0;
1549 } else {
1550 return LDNS_WIREPARSE_ERR_INVALID_STR;
1551 }
1552
1553 my_str++;
1554
1555 /* store number */
1556 s *= 1000.0;
1557 /* add a little to make floor in conversion a round */
1558 s += 0.0005;
1559 longitude = (uint32_t) s;
1560 longitude += 1000 * 60 * m;
1561 longitude += 1000 * 60 * 60 * h;
1562
1563 if (easterness) {
1564 longitude += equator;
1565 } else {
1566 longitude = equator - longitude;
1567 }
1568
1569 altitude = (uint32_t)(strtod(my_str, &my_str)*100.0 +
1570 10000000.0 + 0.5);
1571 if (*my_str == 'm' || *my_str == 'M') {
1572 my_str++;
1573 }
1574
1575 if (strlen(my_str) > 0) {
1576 if(!loc_parse_cm(my_str, &my_str, &size_b, &size_e))
1577 return LDNS_WIREPARSE_ERR_INVALID_STR;
1578 }
1579
1580 if (strlen(my_str) > 0) {
1581 if(!loc_parse_cm(my_str, &my_str, &horiz_pre_b, &horiz_pre_e))
1582 return LDNS_WIREPARSE_ERR_INVALID_STR;
1583 }
1584
1585 if (strlen(my_str) > 0) {
1586 if(!loc_parse_cm(my_str, &my_str, &vert_pre_b, &vert_pre_e))
1587 return LDNS_WIREPARSE_ERR_INVALID_STR;
1588 }
1589
1590 if(*len < 16)
1591 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1592 rd[0] = 0;
1593 rd[1] = ((size_b << 4) & 0xf0) | (size_e & 0x0f);
1594 rd[2] = ((horiz_pre_b << 4) & 0xf0) | (horiz_pre_e & 0x0f);
1595 rd[3] = ((vert_pre_b << 4) & 0xf0) | (vert_pre_e & 0x0f);
1596 sldns_write_uint32(rd + 4, latitude);
1597 sldns_write_uint32(rd + 8, longitude);
1598 sldns_write_uint32(rd + 12, altitude);
1599 *len = 16;
1600 return LDNS_WIREPARSE_ERR_OK;
1601 }
1602
1603 static void
1604 ldns_tolower_str(char* s)
1605 {
1606 if(s) {
1607 while(*s) {
1608 *s = (char)tolower((unsigned char)*s);
1609 s++;
1610 }
1611 }
1612 }
1613
1614 int sldns_str2wire_wks_buf(const char* str, uint8_t* rd, size_t* len)
1615 {
1616 int rd_len = 1;
1617 int have_proto = 0;
1618 char token[50], proto_str[50];
1619 sldns_buffer strbuf;
1620 sldns_buffer_init_frm_data(&strbuf, (uint8_t*)str, strlen(str));
1621 proto_str[0]=0;
1622
1623 /* check we have one byte for proto */
1624 if(*len < 1)
1625 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1626
1627 while(sldns_bget_token(&strbuf, token, "\t\n ", sizeof(token)) > 0) {
1628 ldns_tolower_str(token);
1629 if(!have_proto) {
1630 struct protoent *p = getprotobyname(token);
1631 have_proto = 1;
1632 if(p) rd[0] = (uint8_t)p->p_proto;
1633 else rd[0] = (uint8_t)atoi(token);
1634 (void)strlcpy(proto_str, token, sizeof(proto_str));
1635 } else {
1636 int serv_port;
1637 struct servent *serv = getservbyname(token, proto_str);
1638 if(serv) serv_port=(int)ntohs((uint16_t)serv->s_port);
1639 else {
1640 serv_port = atoi(token);
1641 if(serv_port == 0 && strcmp(token, "0") != 0) {
1642 #ifdef HAVE_ENDSERVENT
1643 endservent();
1644 #endif
1645 #ifdef HAVE_ENDPROTOENT
1646 endprotoent();
1647 #endif
1648 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX,
1649 sldns_buffer_position(&strbuf));
1650 }
1651 if(serv_port < 0 || serv_port > 65535) {
1652 #ifdef HAVE_ENDSERVENT
1653 endservent();
1654 #endif
1655 #ifdef HAVE_ENDPROTOENT
1656 endprotoent();
1657 #endif
1658 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX,
1659 sldns_buffer_position(&strbuf));
1660 }
1661 }
1662 if(rd_len < 1+serv_port/8+1) {
1663 /* bitmap is larger, init new bytes at 0 */
1664 if(*len < 1+(size_t)serv_port/8+1) {
1665 #ifdef HAVE_ENDSERVENT
1666 endservent();
1667 #endif
1668 #ifdef HAVE_ENDPROTOENT
1669 endprotoent();
1670 #endif
1671 return RET_ERR(
1672 LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
1673 sldns_buffer_position(&strbuf));
1674 }
1675 memset(rd+rd_len, 0, 1+(size_t)serv_port/8+1-rd_len);
1676 rd_len = 1+serv_port/8+1;
1677 }
1678 rd[1+ serv_port/8] |= (1 << (7 - serv_port % 8));
1679 }
1680 }
1681 *len = (size_t)rd_len;
1682
1683 #ifdef HAVE_ENDSERVENT
1684 endservent();
1685 #endif
1686 #ifdef HAVE_ENDPROTOENT
1687 endprotoent();
1688 #endif
1689 return LDNS_WIREPARSE_ERR_OK;
1690 }
1691
1692 int sldns_str2wire_nsap_buf(const char* str, uint8_t* rd, size_t* len)
1693 {
1694 const char* s = str;
1695 size_t slen;
1696 size_t dlen = 0; /* number of hexdigits parsed */
1697
1698 /* just a hex string with optional dots? */
1699 if (s[0] != '0' || s[1] != 'x')
1700 return LDNS_WIREPARSE_ERR_INVALID_STR;
1701 s += 2;
1702 slen = strlen(s);
1703 if(slen > LDNS_MAX_RDFLEN*2)
1704 return LDNS_WIREPARSE_ERR_LABEL_OVERFLOW;
1705 while(*s) {
1706 if(isspace((unsigned char)*s) || *s == '.') {
1707 s++;
1708 continue;
1709 }
1710 if(!isxdigit((unsigned char)*s))
1711 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_HEX, s-str);
1712 if(*len < dlen/2 + 1)
1713 return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
1714 s-str);
1715 if((dlen&1)==0)
1716 rd[dlen/2] = (uint8_t)sldns_hexdigit_to_int(*s++) * 16;
1717 else rd[dlen/2] += sldns_hexdigit_to_int(*s++);
1718 dlen++;
1719 }
1720 if((dlen&1)!=0)
1721 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_HEX, s-str);
1722 *len = dlen/2;
1723 return LDNS_WIREPARSE_ERR_OK;
1724 }
1725
1726 int sldns_str2wire_atma_buf(const char* str, uint8_t* rd, size_t* len)
1727 {
1728 const char* s = str;
1729 size_t slen = strlen(str);
1730 size_t dlen = 0; /* number of hexdigits parsed */
1731
1732 /* just a hex string with optional dots? */
1733 /* notimpl e.164 format */
1734 if(slen > LDNS_MAX_RDFLEN*2)
1735 return LDNS_WIREPARSE_ERR_LABEL_OVERFLOW;
1736 while(*s) {
1737 if(isspace((unsigned char)*s) || *s == '.') {
1738 s++;
1739 continue;
1740 }
1741 if(!isxdigit((unsigned char)*s))
1742 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_HEX, s-str);
1743 if(*len < dlen/2 + 1)
1744 return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
1745 s-str);
1746 if((dlen&1)==0)
1747 rd[dlen/2] = (uint8_t)sldns_hexdigit_to_int(*s++) * 16;
1748 else rd[dlen/2] += sldns_hexdigit_to_int(*s++);
1749 dlen++;
1750 }
1751 if((dlen&1)!=0)
1752 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_HEX, s-str);
1753 *len = dlen/2;
1754 return LDNS_WIREPARSE_ERR_OK;
1755 }
1756
1757 int sldns_str2wire_ipseckey_buf(const char* str, uint8_t* rd, size_t* len)
1758 {
1759 size_t gwlen = 0, keylen = 0;
1760 int s;
1761 uint8_t gwtype;
1762 char token[512];
1763 sldns_buffer strbuf;
1764 sldns_buffer_init_frm_data(&strbuf, (uint8_t*)str, strlen(str));
1765
1766 if(*len < 3)
1767 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1768 /* precedence */
1769 if(sldns_bget_token(&strbuf, token, "\t\n ", sizeof(token)) <= 0)
1770 return RET_ERR(LDNS_WIREPARSE_ERR_INVALID_STR,
1771 sldns_buffer_position(&strbuf));
1772 rd[0] = (uint8_t)atoi(token);
1773 /* gateway_type */
1774 if(sldns_bget_token(&strbuf, token, "\t\n ", sizeof(token)) <= 0)
1775 return RET_ERR(LDNS_WIREPARSE_ERR_INVALID_STR,
1776 sldns_buffer_position(&strbuf));
1777 rd[1] = (uint8_t)atoi(token);
1778 gwtype = rd[1];
1779 /* algorithm */
1780 if(sldns_bget_token(&strbuf, token, "\t\n ", sizeof(token)) <= 0)
1781 return RET_ERR(LDNS_WIREPARSE_ERR_INVALID_STR,
1782 sldns_buffer_position(&strbuf));
1783 rd[2] = (uint8_t)atoi(token);
1784
1785 /* gateway */
1786 if(sldns_bget_token(&strbuf, token, "\t\n ", sizeof(token)) <= 0)
1787 return RET_ERR(LDNS_WIREPARSE_ERR_INVALID_STR,
1788 sldns_buffer_position(&strbuf));
1789 if(gwtype == 0) {
1790 /* NOGATEWAY */
1791 if(strcmp(token, ".") != 0)
1792 return RET_ERR(LDNS_WIREPARSE_ERR_INVALID_STR,
1793 sldns_buffer_position(&strbuf));
1794 gwlen = 0;
1795 } else if(gwtype == 1) {
1796 /* IP4 */
1797 gwlen = *len - 3;
1798 s = sldns_str2wire_a_buf(token, rd+3, &gwlen);
1799 if(s) return RET_ERR_SHIFT(s, sldns_buffer_position(&strbuf));
1800 } else if(gwtype == 2) {
1801 /* IP6 */
1802 gwlen = *len - 3;
1803 s = sldns_str2wire_aaaa_buf(token, rd+3, &gwlen);
1804 if(s) return RET_ERR_SHIFT(s, sldns_buffer_position(&strbuf));
1805 } else if(gwtype == 3) {
1806 /* DNAME */
1807 gwlen = *len - 3;
1808 s = sldns_str2wire_dname_buf(token, rd+3, &gwlen);
1809 if(s) return RET_ERR_SHIFT(s, sldns_buffer_position(&strbuf));
1810 } else {
1811 /* unknown gateway type */
1812 return RET_ERR(LDNS_WIREPARSE_ERR_INVALID_STR,
1813 sldns_buffer_position(&strbuf));
1814 }
1815 /* double check for size */
1816 if(*len < 3 + gwlen)
1817 return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
1818 sldns_buffer_position(&strbuf));
1819
1820 /* publickey in remainder of strbuf */
1821 keylen = *len - 3 - gwlen;
1822 s = sldns_str2wire_b64_buf((const char*)sldns_buffer_current(&strbuf),
1823 rd+3+gwlen, &keylen);
1824 if(s) return RET_ERR_SHIFT(s, sldns_buffer_position(&strbuf));
1825
1826 *len = 3 + gwlen + keylen;
1827 return LDNS_WIREPARSE_ERR_OK;
1828 }
1829
1830 int sldns_str2wire_nsec3_salt_buf(const char* str, uint8_t* rd, size_t* len)
1831 {
1832 int i, salt_length_str = (int)strlen(str);
1833 if (salt_length_str == 1 && str[0] == '-') {
1834 salt_length_str = 0;
1835 } else if (salt_length_str % 2 != 0) {
1836 return LDNS_WIREPARSE_ERR_SYNTAX_HEX;
1837 }
1838 if (salt_length_str > 512)
1839 return LDNS_WIREPARSE_ERR_SYNTAX_HEX;
1840 if(*len < 1+(size_t)salt_length_str / 2)
1841 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1842 rd[0] = (uint8_t) (salt_length_str / 2);
1843 for (i = 0; i < salt_length_str; i += 2) {
1844 if (isxdigit((unsigned char)str[i]) &&
1845 isxdigit((unsigned char)str[i+1])) {
1846 rd[1+i/2] = (uint8_t)(sldns_hexdigit_to_int(str[i])*16
1847 + sldns_hexdigit_to_int(str[i+1]));
1848 } else {
1849 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_HEX, i);
1850 }
1851 }
1852 *len = 1 + (size_t)rd[0];
1853 return LDNS_WIREPARSE_ERR_OK;
1854 }
1855
1856 int sldns_str2wire_ilnp64_buf(const char* str, uint8_t* rd, size_t* len)
1857 {
1858 unsigned int a, b, c, d;
1859 uint16_t shorts[4];
1860 int l;
1861 if(*len < sizeof(shorts))
1862 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1863
1864 if (sscanf(str, "%4x:%4x:%4x:%4x%n", &a, &b, &c, &d, &l) != 4 ||
1865 l != (int)strlen(str) || /* more data to read */
1866 strpbrk(str, "+-") /* signed hexes */
1867 )
1868 return LDNS_WIREPARSE_ERR_SYNTAX_ILNP64;
1869 shorts[0] = htons(a);
1870 shorts[1] = htons(b);
1871 shorts[2] = htons(c);
1872 shorts[3] = htons(d);
1873 memmove(rd, &shorts, sizeof(shorts));
1874 *len = sizeof(shorts);
1875 return LDNS_WIREPARSE_ERR_OK;
1876 }
1877
1878 int sldns_str2wire_eui48_buf(const char* str, uint8_t* rd, size_t* len)
1879 {
1880 unsigned int a, b, c, d, e, f;
1881 int l;
1882
1883 if(*len < 6)
1884 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1885 if (sscanf(str, "%2x-%2x-%2x-%2x-%2x-%2x%n",
1886 &a, &b, &c, &d, &e, &f, &l) != 6 ||
1887 l != (int)strlen(str))
1888 return LDNS_WIREPARSE_ERR_SYNTAX_EUI48;
1889 rd[0] = a;
1890 rd[1] = b;
1891 rd[2] = c;
1892 rd[3] = d;
1893 rd[4] = e;
1894 rd[5] = f;
1895 *len = 6;
1896 return LDNS_WIREPARSE_ERR_OK;
1897 }
1898
1899 int sldns_str2wire_eui64_buf(const char* str, uint8_t* rd, size_t* len)
1900 {
1901 unsigned int a, b, c, d, e, f, g, h;
1902 int l;
1903
1904 if(*len < 8)
1905 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1906 if (sscanf(str, "%2x-%2x-%2x-%2x-%2x-%2x-%2x-%2x%n",
1907 &a, &b, &c, &d, &e, &f, &g, &h, &l) != 8 ||
1908 l != (int)strlen(str))
1909 return LDNS_WIREPARSE_ERR_SYNTAX_EUI64;
1910 rd[0] = a;
1911 rd[1] = b;
1912 rd[2] = c;
1913 rd[3] = d;
1914 rd[4] = e;
1915 rd[5] = f;
1916 rd[6] = g;
1917 rd[7] = h;
1918 *len = 8;
1919 return LDNS_WIREPARSE_ERR_OK;
1920 }
1921
1922 int sldns_str2wire_tag_buf(const char* str, uint8_t* rd, size_t* len)
1923 {
1924 size_t slen = strlen(str);
1925 const char* ptr;
1926
1927 if (slen > 255)
1928 return LDNS_WIREPARSE_ERR_SYNTAX_TAG;
1929 if(*len < slen+1)
1930 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1931 for (ptr = str; *ptr; ptr++) {
1932 if(!isalnum((unsigned char)*ptr))
1933 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_TAG, ptr-str);
1934 }
1935 rd[0] = slen;
1936 memmove(rd+1, str, slen);
1937 *len = slen+1;
1938 return LDNS_WIREPARSE_ERR_OK;
1939 }
1940
1941 int sldns_str2wire_long_str_buf(const char* str, uint8_t* rd, size_t* len)
1942 {
1943 uint8_t ch = 0;
1944 const char* pstr = str;
1945 size_t length = 0;
1946
1947 /* Fill data with parsed bytes */
1948 while (sldns_parse_char(&ch, &pstr)) {
1949 if(*len < length+1)
1950 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1951 rd[length++] = ch;
1952 }
1953 if(!pstr)
1954 return LDNS_WIREPARSE_ERR_SYNTAX_BAD_ESCAPE;
1955 *len = length;
1956 return LDNS_WIREPARSE_ERR_OK;
1957 }
1958
1959 int sldns_str2wire_hip_buf(const char* str, uint8_t* rd, size_t* len)
1960 {
1961 char* s, *end;
1962 int e;
1963 size_t hitlen, pklen = 0;
1964 /* presentation format:
1965 * pk-algo HIThex pubkeybase64
1966 * wireformat:
1967 * hitlen[1byte] pkalgo[1byte] pubkeylen[2byte] [hit] [pubkey] */
1968 if(*len < 4)
1969 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
1970
1971 /* read PK algorithm */
1972 rd[1] = (uint8_t)strtol((char*)str, &s, 10);
1973 if(*s != ' ')
1974 return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_INT, s-(char*)str);
1975 s++;
1976 while(*s == ' ')
1977 s++;
1978
1979 /* read HIT hex tag */
1980 /* zero terminate the tag (replace later) */
1981 end = strchr(s, ' ');
1982 if(!end) return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX, s-(char*)str);
1983 *end = 0;
1984 hitlen = *len - 4;
1985 if((e = sldns_str2wire_hex_buf(s, rd+4, &hitlen)) != 0) {
1986 *end = ' ';
1987 return RET_ERR_SHIFT(e, s-(char*)str);
1988 }
1989 if(hitlen > 255) {
1990 *end = ' ';
1991 return RET_ERR(LDNS_WIREPARSE_ERR_LABEL_OVERFLOW, s-(char*)str+255*2);
1992 }
1993 rd[0] = (uint8_t)hitlen;
1994 *end = ' ';
1995 s = end+1;
1996
1997 /* read pubkey base64 sequence */
1998 pklen = *len - 4 - hitlen;
1999 if((e = sldns_str2wire_b64_buf(s, rd+4+hitlen, &pklen)) != 0)
2000 return RET_ERR_SHIFT(e, s-(char*)str);
2001 if(pklen > 65535)
2002 return RET_ERR(LDNS_WIREPARSE_ERR_LABEL_OVERFLOW, s-(char*)str+65535);
2003 sldns_write_uint16(rd+2, pklen);
2004
2005 *len = 4 + hitlen + pklen;
2006 return LDNS_WIREPARSE_ERR_OK;
2007 }
2008
2009 int sldns_str2wire_int16_data_buf(const char* str, uint8_t* rd, size_t* len)
2010 {
2011 size_t sz = sldns_b64_pton_calculate_size(strlen(str));
2012 int n;
2013 if(*len < sz+2)
2014 return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
2015 if(sz > 65535)
2016 return LDNS_WIREPARSE_ERR_LABEL_OVERFLOW;
2017 n = sldns_b64_pton(str, rd+2, (*len)-2);
2018 if(n < 0)
2019 return LDNS_WIREPARSE_ERR_SYNTAX_B64;
2020 sldns_write_uint16(rd, (uint16_t)n);
2021 *len = (size_t)n;
2022 return LDNS_WIREPARSE_ERR_OK;
2023 }
mirror of network_cmds