1 /*
2 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (c) 1996-1999 by Internet Software Consortium.
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
15 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include "port_before.h"
19
20 #include <sys/types.h>
21 #include <sys/socket.h>
22
23 #include <netinet/in.h>
24 #include <arpa/nameser.h>
25 #include <arpa/inet.h>
26
27 #include <isc/assertions.h>
28 #include <isc/dst.h>
29 #include <errno.h>
30 #include <resolv.h>
31 #include <string.h>
32 #include <ctype.h>
33
34 #include "port_after.h"
35
36 #ifdef SPRINTF_CHAR
37 # define SPRINTF(x) strlen(sprintf/**/x)
38 #else
39 # define SPRINTF(x) ((size_t)sprintf x)
40 #endif
41
42 /* Forward. */
43
44 static size_t prune_origin(const char *name, const char *origin);
45 static int charstr(const u_char *rdata, const u_char *edata,
46 char **buf, size_t *buflen);
47 static int addname(const u_char *msg, size_t msglen,
48 const u_char **p, const char *origin,
49 char **buf, size_t *buflen);
50 static void addlen(size_t len, char **buf, size_t *buflen);
51 static int addstr(const char *src, size_t len,
52 char **buf, size_t *buflen);
53 static int addtab(size_t len, size_t target, int spaced,
54 char **buf, size_t *buflen);
55
56 /* Macros. */
57
58 #define T(x) \
59 do { \
60 if ((x) < 0) \
61 return (-1); \
62 } while (0)
63
64 static const char base32hex[] =
65 "0123456789ABCDEFGHIJKLMNOPQRSTUV=0123456789abcdefghijklmnopqrstuv";
66
67 /* Public. */
68
69 /*%
70 * Convert an RR to presentation format.
71 *
72 * return:
73 *\li Number of characters written to buf, or -1 (check errno).
74 */
75 int
76 ns_sprintrr(const ns_msg *handle, const ns_rr *rr,
77 const char *name_ctx, const char *origin,
78 char *buf, size_t buflen)
79 {
80 int n;
81
82 n = ns_sprintrrf(ns_msg_base(*handle), ns_msg_size(*handle),
83 ns_rr_name(*rr), ns_rr_class(*rr), ns_rr_type(*rr),
84 ns_rr_ttl(*rr), ns_rr_rdata(*rr), ns_rr_rdlen(*rr),
85 name_ctx, origin, buf, buflen);
86 return (n);
87 }
88
89 /*%
90 * Convert the fields of an RR into presentation format.
91 *
92 * return:
93 *\li Number of characters written to buf, or -1 (check errno).
94 */
95 int
96 ns_sprintrrf(const u_char *msg, size_t msglen,
97 const char *name, ns_class class, ns_type type,
98 u_long ttl, const u_char *rdata, size_t rdlen,
99 const char *name_ctx, const char *origin,
100 char *buf, size_t buflen)
101 {
102 const char *obuf = buf;
103 const u_char *edata = rdata + rdlen;
104 int spaced = 0;
105
106 const char *comment;
107 char tmp[100];
108 int len, x;
109
110 /*
111 * Owner.
112 */
113 if (name_ctx != NULL && ns_samename(name_ctx, name) == 1) {
114 T(addstr("\t\t\t", 3, &buf, &buflen));
115 } else {
116 len = prune_origin(name, origin);
117 if (*name == '\0') {
118 goto root;
119 } else if (len == 0) {
120 T(addstr("@\t\t\t", 4, &buf, &buflen));
121 } else {
122 T(addstr(name, len, &buf, &buflen));
123 /* Origin not used or not root, and no trailing dot? */
124 if (((origin == NULL || origin[0] == '\0') ||
125 (origin[0] != '.' && origin[1] != '\0' &&
126 name[len] == '\0')) && name[len - 1] != '.') {
127 root:
128 T(addstr(".", 1, &buf, &buflen));
129 len++;
130 }
131 T(spaced = addtab(len, 24, spaced, &buf, &buflen));
132 }
133 }
134
135 /*
136 * TTL, Class, Type.
137 */
138 T(x = ns_format_ttl(ttl, buf, buflen));
139 addlen(x, &buf, &buflen);
140 len = SPRINTF((tmp, " %s %s", p_class(class), p_type(type)));
141 T(addstr(tmp, len, &buf, &buflen));
142 T(spaced = addtab(x + len, 16, spaced, &buf, &buflen));
143
144 /*
145 * RData.
146 */
147 switch (type) {
148 case ns_t_a:
149 if (rdlen != (size_t)NS_INADDRSZ)
150 goto formerr;
151 (void) inet_ntop(AF_INET, rdata, buf, buflen);
152 addlen(strlen(buf), &buf, &buflen);
153 break;
154
155 case ns_t_cname:
156 case ns_t_mb:
157 case ns_t_mg:
158 case ns_t_mr:
159 case ns_t_ns:
160 case ns_t_ptr:
161 case ns_t_dname:
162 T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
163 break;
164
165 case ns_t_hinfo:
166 case ns_t_isdn:
167 /* First word. */
168 T(len = charstr(rdata, edata, &buf, &buflen));
169 if (len == 0)
170 goto formerr;
171 rdata += len;
172 T(addstr(" ", 1, &buf, &buflen));
173
174
175 /* Second word, optional in ISDN records. */
176 if (type == ns_t_isdn && rdata == edata)
177 break;
178
179 T(len = charstr(rdata, edata, &buf, &buflen));
180 if (len == 0)
181 goto formerr;
182 rdata += len;
183 break;
184
185 case ns_t_soa: {
186 u_long t;
187
188 /* Server name. */
189 T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
190 T(addstr(" ", 1, &buf, &buflen));
191
192 /* Administrator name. */
193 T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
194 T(addstr(" (\n", 3, &buf, &buflen));
195 spaced = 0;
196
197 if ((edata - rdata) != 5*NS_INT32SZ)
198 goto formerr;
199
200 /* Serial number. */
201 t = ns_get32(rdata); rdata += NS_INT32SZ;
202 T(addstr("\t\t\t\t\t", 5, &buf, &buflen));
203 len = SPRINTF((tmp, "%lu", t));
204 T(addstr(tmp, len, &buf, &buflen));
205 T(spaced = addtab(len, 16, spaced, &buf, &buflen));
206 T(addstr("; serial\n", 9, &buf, &buflen));
207 spaced = 0;
208
209 /* Refresh interval. */
210 t = ns_get32(rdata); rdata += NS_INT32SZ;
211 T(addstr("\t\t\t\t\t", 5, &buf, &buflen));
212 T(len = ns_format_ttl(t, buf, buflen));
213 addlen(len, &buf, &buflen);
214 T(spaced = addtab(len, 16, spaced, &buf, &buflen));
215 T(addstr("; refresh\n", 10, &buf, &buflen));
216 spaced = 0;
217
218 /* Retry interval. */
219 t = ns_get32(rdata); rdata += NS_INT32SZ;
220 T(addstr("\t\t\t\t\t", 5, &buf, &buflen));
221 T(len = ns_format_ttl(t, buf, buflen));
222 addlen(len, &buf, &buflen);
223 T(spaced = addtab(len, 16, spaced, &buf, &buflen));
224 T(addstr("; retry\n", 8, &buf, &buflen));
225 spaced = 0;
226
227 /* Expiry. */
228 t = ns_get32(rdata); rdata += NS_INT32SZ;
229 T(addstr("\t\t\t\t\t", 5, &buf, &buflen));
230 T(len = ns_format_ttl(t, buf, buflen));
231 addlen(len, &buf, &buflen);
232 T(spaced = addtab(len, 16, spaced, &buf, &buflen));
233 T(addstr("; expiry\n", 9, &buf, &buflen));
234 spaced = 0;
235
236 /* Minimum TTL. */
237 t = ns_get32(rdata); rdata += NS_INT32SZ;
238 T(addstr("\t\t\t\t\t", 5, &buf, &buflen));
239 T(len = ns_format_ttl(t, buf, buflen));
240 addlen(len, &buf, &buflen);
241 T(addstr(" )", 2, &buf, &buflen));
242 T(spaced = addtab(len, 16, spaced, &buf, &buflen));
243 T(addstr("; minimum\n", 10, &buf, &buflen));
244
245 break;
246 }
247
248 case ns_t_mx:
249 case ns_t_afsdb:
250 case ns_t_rt:
251 case ns_t_kx: {
252 u_int t;
253
254 if (rdlen < (size_t)NS_INT16SZ)
255 goto formerr;
256
257 /* Priority. */
258 t = ns_get16(rdata);
259 rdata += NS_INT16SZ;
260 len = SPRINTF((tmp, "%u ", t));
261 T(addstr(tmp, len, &buf, &buflen));
262
263 /* Target. */
264 T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
265
266 break;
267 }
268
269 case ns_t_px: {
270 u_int t;
271
272 if (rdlen < (size_t)NS_INT16SZ)
273 goto formerr;
274
275 /* Priority. */
276 t = ns_get16(rdata);
277 rdata += NS_INT16SZ;
278 len = SPRINTF((tmp, "%u ", t));
279 T(addstr(tmp, len, &buf, &buflen));
280
281 /* Name1. */
282 T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
283 T(addstr(" ", 1, &buf, &buflen));
284
285 /* Name2. */
286 T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
287
288 break;
289 }
290
291 case ns_t_x25:
292 T(len = charstr(rdata, edata, &buf, &buflen));
293 if (len == 0)
294 goto formerr;
295 rdata += len;
296 break;
297
298 case ns_t_txt:
299 case ns_t_spf:
300 while (rdata < edata) {
301 T(len = charstr(rdata, edata, &buf, &buflen));
302 if (len == 0)
303 goto formerr;
304 rdata += len;
305 if (rdata < edata)
306 T(addstr(" ", 1, &buf, &buflen));
307 }
308 break;
309
310 case ns_t_nsap: {
311 char t[2+255*3];
312
313 (void) inet_nsap_ntoa(rdlen, rdata, t);
314 T(addstr(t, strlen(t), &buf, &buflen));
315 break;
316 }
317
318 case ns_t_aaaa:
319 if (rdlen != (size_t)NS_IN6ADDRSZ)
320 goto formerr;
321 (void) inet_ntop(AF_INET6, rdata, buf, buflen);
322 addlen(strlen(buf), &buf, &buflen);
323 break;
324
325 case ns_t_loc: {
326 char t[255];
327
328 /* XXX protocol format checking? */
329 (void) loc_ntoa(rdata, t);
330 T(addstr(t, strlen(t), &buf, &buflen));
331 break;
332 }
333
334 case ns_t_naptr: {
335 u_int order, preference;
336 char t[50];
337
338 if (rdlen < 2U*NS_INT16SZ)
339 goto formerr;
340
341 /* Order, Precedence. */
342 order = ns_get16(rdata); rdata += NS_INT16SZ;
343 preference = ns_get16(rdata); rdata += NS_INT16SZ;
344 len = SPRINTF((t, "%u %u ", order, preference));
345 T(addstr(t, len, &buf, &buflen));
346
347 /* Flags. */
348 T(len = charstr(rdata, edata, &buf, &buflen));
349 if (len == 0)
350 goto formerr;
351 rdata += len;
352 T(addstr(" ", 1, &buf, &buflen));
353
354 /* Service. */
355 T(len = charstr(rdata, edata, &buf, &buflen));
356 if (len == 0)
357 goto formerr;
358 rdata += len;
359 T(addstr(" ", 1, &buf, &buflen));
360
361 /* Regexp. */
362 T(len = charstr(rdata, edata, &buf, &buflen));
363 if (len < 0)
364 return (-1);
365 if (len == 0)
366 goto formerr;
367 rdata += len;
368 T(addstr(" ", 1, &buf, &buflen));
369
370 /* Server. */
371 T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
372 break;
373 }
374
375 case ns_t_srv: {
376 u_int priority, weight, port;
377 char t[50];
378
379 if (rdlen < 3U*NS_INT16SZ)
380 goto formerr;
381
382 /* Priority, Weight, Port. */
383 priority = ns_get16(rdata); rdata += NS_INT16SZ;
384 weight = ns_get16(rdata); rdata += NS_INT16SZ;
385 port = ns_get16(rdata); rdata += NS_INT16SZ;
386 len = SPRINTF((t, "%u %u %u ", priority, weight, port));
387 T(addstr(t, len, &buf, &buflen));
388
389 /* Server. */
390 T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
391 break;
392 }
393
394 case ns_t_minfo:
395 case ns_t_rp:
396 /* Name1. */
397 T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
398 T(addstr(" ", 1, &buf, &buflen));
399
400 /* Name2. */
401 T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
402
403 break;
404
405 case ns_t_wks: {
406 int n, lcnt;
407
408 if (rdlen < 1U + NS_INT32SZ)
409 goto formerr;
410
411 /* Address. */
412 (void) inet_ntop(AF_INET, rdata, buf, buflen);
413 addlen(strlen(buf), &buf, &buflen);
414 rdata += NS_INADDRSZ;
415
416 /* Protocol. */
417 len = SPRINTF((tmp, " %u ( ", *rdata));
418 T(addstr(tmp, len, &buf, &buflen));
419 rdata += NS_INT8SZ;
420
421 /* Bit map. */
422 n = 0;
423 lcnt = 0;
424 while (rdata < edata) {
425 u_int c = *rdata++;
426 do {
427 if (c & 0200) {
428 if (lcnt == 0) {
429 T(addstr("\n\t\t\t\t", 5,
430 &buf, &buflen));
431 lcnt = 10;
432 spaced = 0;
433 }
434 len = SPRINTF((tmp, "%d ", n));
435 T(addstr(tmp, len, &buf, &buflen));
436 lcnt--;
437 }
438 c <<= 1;
439 } while (++n & 07);
440 }
441 T(addstr(")", 1, &buf, &buflen));
442
443 break;
444 }
445
446 case ns_t_key:
447 case ns_t_dnskey: {
448 char base64_key[NS_MD5RSA_MAX_BASE64];
449 u_int keyflags, protocol, algorithm, key_id;
450 const char *leader;
451 int n;
452
453 if (rdlen < 0U + NS_INT16SZ + NS_INT8SZ + NS_INT8SZ)
454 goto formerr;
455
456 /* Key flags, Protocol, Algorithm. */
457 key_id = dst_s_dns_key_id(rdata, edata-rdata);
458 keyflags = ns_get16(rdata); rdata += NS_INT16SZ;
459 protocol = *rdata++;
460 algorithm = *rdata++;
461 len = SPRINTF((tmp, "0x%04x %u %u",
462 keyflags, protocol, algorithm));
463 T(addstr(tmp, len, &buf, &buflen));
464
465 /* Public key data. */
466 len = b64_ntop(rdata, edata - rdata,
467 base64_key, sizeof base64_key);
468 if (len < 0)
469 goto formerr;
470 if (len > 15) {
471 T(addstr(" (", 2, &buf, &buflen));
472 leader = "\n\t\t";
473 spaced = 0;
474 } else
475 leader = " ";
476 for (n = 0; n < len; n += 48) {
477 T(addstr(leader, strlen(leader), &buf, &buflen));
478 T(addstr(base64_key + n, MIN(len - n, 48),
479 &buf, &buflen));
480 }
481 if (len > 15)
482 T(addstr(" )", 2, &buf, &buflen));
483 n = SPRINTF((tmp, " ; key_tag= %u", key_id));
484 T(addstr(tmp, n, &buf, &buflen));
485
486 break;
487 }
488
489 case ns_t_sig:
490 case ns_t_rrsig: {
491 char base64_key[NS_MD5RSA_MAX_BASE64];
492 u_int type, algorithm, labels, footprint;
493 const char *leader;
494 u_long t;
495 int n;
496
497 if (rdlen < 22U)
498 goto formerr;
499
500 /* Type covered, Algorithm, Label count, Original TTL. */
501 type = ns_get16(rdata); rdata += NS_INT16SZ;
502 algorithm = *rdata++;
503 labels = *rdata++;
504 t = ns_get32(rdata); rdata += NS_INT32SZ;
505 len = SPRINTF((tmp, "%s %d %d %lu ",
506 p_type(type), algorithm, labels, t));
507 T(addstr(tmp, len, &buf, &buflen));
508 if (labels > (u_int)dn_count_labels(name))
509 goto formerr;
510
511 /* Signature expiry. */
512 t = ns_get32(rdata); rdata += NS_INT32SZ;
513 len = SPRINTF((tmp, "%s ", p_secstodate(t)));
514 T(addstr(tmp, len, &buf, &buflen));
515
516 /* Time signed. */
517 t = ns_get32(rdata); rdata += NS_INT32SZ;
518 len = SPRINTF((tmp, "%s ", p_secstodate(t)));
519 T(addstr(tmp, len, &buf, &buflen));
520
521 /* Signature Footprint. */
522 footprint = ns_get16(rdata); rdata += NS_INT16SZ;
523 len = SPRINTF((tmp, "%u ", footprint));
524 T(addstr(tmp, len, &buf, &buflen));
525
526 /* Signer's name. */
527 T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
528
529 /* Signature. */
530 len = b64_ntop(rdata, edata - rdata,
531 base64_key, sizeof base64_key);
532 if (len > 15) {
533 T(addstr(" (", 2, &buf, &buflen));
534 leader = "\n\t\t";
535 spaced = 0;
536 } else
537 leader = " ";
538 if (len < 0)
539 goto formerr;
540 for (n = 0; n < len; n += 48) {
541 T(addstr(leader, strlen(leader), &buf, &buflen));
542 T(addstr(base64_key + n, MIN(len - n, 48),
543 &buf, &buflen));
544 }
545 if (len > 15)
546 T(addstr(" )", 2, &buf, &buflen));
547 break;
548 }
549
550 case ns_t_nxt: {
551 int n, c;
552
553 /* Next domain name. */
554 T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
555
556 /* Type bit map. */
557 n = edata - rdata;
558 for (c = 0; c < n*8; c++)
559 if (NS_NXT_BIT_ISSET(c, rdata)) {
560 len = SPRINTF((tmp, " %s", p_type(c)));
561 T(addstr(tmp, len, &buf, &buflen));
562 }
563 break;
564 }
565
566 case ns_t_cert: {
567 u_int c_type, key_tag, alg;
568 int n;
569 unsigned int siz;
570 char base64_cert[8192], tmp[40];
571 const char *leader;
572
573 c_type = ns_get16(rdata); rdata += NS_INT16SZ;
574 key_tag = ns_get16(rdata); rdata += NS_INT16SZ;
575 alg = (u_int) *rdata++;
576
577 len = SPRINTF((tmp, "%d %d %d ", c_type, key_tag, alg));
578 T(addstr(tmp, len, &buf, &buflen));
579 siz = (edata-rdata)*4/3 + 4; /* "+4" accounts for trailing \0 */
580 if (siz > sizeof(base64_cert) * 3/4) {
581 const char *str = "record too long to print";
582 T(addstr(str, strlen(str), &buf, &buflen));
583 }
584 else {
585 len = b64_ntop(rdata, edata-rdata, base64_cert, siz);
586
587 if (len < 0)
588 goto formerr;
589 else if (len > 15) {
590 T(addstr(" (", 2, &buf, &buflen));
591 leader = "\n\t\t";
592 spaced = 0;
593 }
594 else
595 leader = " ";
596
597 for (n = 0; n < len; n += 48) {
598 T(addstr(leader, strlen(leader),
599 &buf, &buflen));
600 T(addstr(base64_cert + n, MIN(len - n, 48),
601 &buf, &buflen));
602 }
603 if (len > 15)
604 T(addstr(" )", 2, &buf, &buflen));
605 }
606 break;
607 }
608
609 case ns_t_tkey: {
610 /* KJD - need to complete this */
611 u_long t;
612 int mode, err, keysize;
613
614 /* Algorithm name. */
615 T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
616 T(addstr(" ", 1, &buf, &buflen));
617
618 /* Inception. */
619 t = ns_get32(rdata); rdata += NS_INT32SZ;
620 len = SPRINTF((tmp, "%s ", p_secstodate(t)));
621 T(addstr(tmp, len, &buf, &buflen));
622
623 /* Experation. */
624 t = ns_get32(rdata); rdata += NS_INT32SZ;
625 len = SPRINTF((tmp, "%s ", p_secstodate(t)));
626 T(addstr(tmp, len, &buf, &buflen));
627
628 /* Mode , Error, Key Size. */
629 /* Priority, Weight, Port. */
630 mode = ns_get16(rdata); rdata += NS_INT16SZ;
631 err = ns_get16(rdata); rdata += NS_INT16SZ;
632 keysize = ns_get16(rdata); rdata += NS_INT16SZ;
633 len = SPRINTF((tmp, "%u %u %u ", mode, err, keysize));
634 T(addstr(tmp, len, &buf, &buflen));
635
636 /* XXX need to dump key, print otherdata length & other data */
637 break;
638 }
639
640 case ns_t_tsig: {
641 /* BEW - need to complete this */
642 int n;
643
644 T(len = addname(msg, msglen, &rdata, origin, &buf, &buflen));
645 T(addstr(" ", 1, &buf, &buflen));
646 rdata += 8; /*%< time */
647 n = ns_get16(rdata); rdata += INT16SZ;
648 rdata += n; /*%< sig */
649 n = ns_get16(rdata); rdata += INT16SZ; /*%< original id */
650 sprintf(buf, "%d", ns_get16(rdata));
651 rdata += INT16SZ;
652 addlen(strlen(buf), &buf, &buflen);
653 break;
654 }
655
656 case ns_t_a6: {
657 struct in6_addr a;
658 int pbyte, pbit;
659
660 /* prefix length */
661 if (rdlen == 0U) goto formerr;
662 len = SPRINTF((tmp, "%d ", *rdata));
663 T(addstr(tmp, len, &buf, &buflen));
664 pbit = *rdata;
665 if (pbit > 128) goto formerr;
666 pbyte = (pbit & ~7) / 8;
667 rdata++;
668
669 /* address suffix: provided only when prefix len != 128 */
670 if (pbit < 128) {
671 if (rdata + pbyte >= edata) goto formerr;
672 memset(&a, 0, sizeof(a));
673 memcpy(&a.s6_addr[pbyte], rdata, sizeof(a) - pbyte);
674 (void) inet_ntop(AF_INET6, &a, buf, buflen);
675 addlen(strlen(buf), &buf, &buflen);
676 rdata += sizeof(a) - pbyte;
677 }
678
679 /* prefix name: provided only when prefix len > 0 */
680 if (pbit == 0)
681 break;
682 if (rdata >= edata) goto formerr;
683 T(addstr(" ", 1, &buf, &buflen));
684 T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
685
686 break;
687 }
688
689 case ns_t_opt: {
690 len = SPRINTF((tmp, "%u bytes", class));
691 T(addstr(tmp, len, &buf, &buflen));
692 break;
693 }
694
695 case ns_t_ds:
696 case ns_t_dlv:
697 case ns_t_sshfp: {
698 u_int t;
699
700 if (type == ns_t_ds || type == ns_t_dlv) {
701 if (rdlen < 4U) goto formerr;
702 t = ns_get16(rdata);
703 rdata += NS_INT16SZ;
704 len = SPRINTF((tmp, "%u ", t));
705 T(addstr(tmp, len, &buf, &buflen));
706 } else
707 if (rdlen < 2U) goto formerr;
708
709 len = SPRINTF((tmp, "%u ", *rdata));
710 T(addstr(tmp, len, &buf, &buflen));
711 rdata++;
712
713 len = SPRINTF((tmp, "%u ", *rdata));
714 T(addstr(tmp, len, &buf, &buflen));
715 rdata++;
716
717 while (rdata < edata) {
718 len = SPRINTF((tmp, "%02X", *rdata));
719 T(addstr(tmp, len, &buf, &buflen));
720 rdata++;
721 }
722 break;
723 }
724
725 case ns_t_nsec3:
726 case ns_t_nsec3param: {
727 u_int t, w, l, j, k, c;
728
729 len = SPRINTF((tmp, "%u ", *rdata));
730 T(addstr(tmp, len, &buf, &buflen));
731 rdata++;
732
733 len = SPRINTF((tmp, "%u ", *rdata));
734 T(addstr(tmp, len, &buf, &buflen));
735 rdata++;
736
737 t = ns_get16(rdata);
738 rdata += NS_INT16SZ;
739 len = SPRINTF((tmp, "%u ", t));
740 T(addstr(tmp, len, &buf, &buflen));
741
742 t = *rdata++;
743 if (t == 0) {
744 T(addstr("-", 1, &buf, &buflen));
745 } else {
746 while (t-- > 0) {
747 len = SPRINTF((tmp, "%02X", *rdata));
748 T(addstr(tmp, len, &buf, &buflen));
749 rdata++;
750 }
751 }
752 if (type == ns_t_nsec3param)
753 break;
754 T(addstr(" ", 1, &buf, &buflen));
755
756 t = *rdata++;
757 while (t > 0) {
758 switch (t) {
759 case 1:
760 tmp[0] = base32hex[((rdata[0]>>3)&0x1f)];
761 tmp[1] = base32hex[((rdata[0]<<2)&0x1c)];
762 tmp[2] = tmp[3] = tmp[4] = '=';
763 tmp[5] = tmp[6] = tmp[7] = '=';
764 break;
765 case 2:
766 tmp[0] = base32hex[((rdata[0]>>3)&0x1f)];
767 tmp[1] = base32hex[((rdata[0]<<2)&0x1c)|
768 ((rdata[1]>>6)&0x03)];
769 tmp[2] = base32hex[((rdata[1]>>1)&0x1f)];
770 tmp[3] = base32hex[((rdata[1]<<4)&0x10)];
771 tmp[4] = tmp[5] = tmp[6] = tmp[7] = '=';
772 break;
773 case 3:
774 tmp[0] = base32hex[((rdata[0]>>3)&0x1f)];
775 tmp[1] = base32hex[((rdata[0]<<2)&0x1c)|
776 ((rdata[1]>>6)&0x03)];
777 tmp[2] = base32hex[((rdata[1]>>1)&0x1f)];
778 tmp[3] = base32hex[((rdata[1]<<4)&0x10)|
779 ((rdata[2]>>4)&0x0f)];
780 tmp[4] = base32hex[((rdata[2]<<1)&0x1e)];
781 tmp[5] = tmp[6] = tmp[7] = '=';
782 break;
783 case 4:
784 tmp[0] = base32hex[((rdata[0]>>3)&0x1f)];
785 tmp[1] = base32hex[((rdata[0]<<2)&0x1c)|
786 ((rdata[1]>>6)&0x03)];
787 tmp[2] = base32hex[((rdata[1]>>1)&0x1f)];
788 tmp[3] = base32hex[((rdata[1]<<4)&0x10)|
789 ((rdata[2]>>4)&0x0f)];
790 tmp[4] = base32hex[((rdata[2]<<1)&0x1e)|
791 ((rdata[3]>>7)&0x01)];
792 tmp[5] = base32hex[((rdata[3]>>2)&0x1f)];
793 tmp[6] = base32hex[(rdata[3]<<3)&0x18];
794 tmp[7] = '=';
795 break;
796 default:
797 tmp[0] = base32hex[((rdata[0]>>3)&0x1f)];
798 tmp[1] = base32hex[((rdata[0]<<2)&0x1c)|
799 ((rdata[1]>>6)&0x03)];
800 tmp[2] = base32hex[((rdata[1]>>1)&0x1f)];
801 tmp[3] = base32hex[((rdata[1]<<4)&0x10)|
802 ((rdata[2]>>4)&0x0f)];
803 tmp[4] = base32hex[((rdata[2]<<1)&0x1e)|
804 ((rdata[3]>>7)&0x01)];
805 tmp[5] = base32hex[((rdata[3]>>2)&0x1f)];
806 tmp[6] = base32hex[((rdata[3]<<3)&0x18)|
807 ((rdata[4]>>5)&0x07)];
808 tmp[7] = base32hex[(rdata[4]&0x1f)];
809 break;
810 }
811 T(addstr(tmp, 8, &buf, &buflen));
812 if (t >= 5) {
813 rdata += 5;
814 t -= 5;
815 } else {
816 rdata += t;
817 t -= t;
818 }
819 }
820
821 while (rdata < edata) {
822 w = *rdata++;
823 l = *rdata++;
824 for (j = 0; j < l; j++) {
825 if (rdata[j] == 0)
826 continue;
827 for (k = 0; k < 8; k++) {
828 if ((rdata[j] & (0x80 >> k)) == 0)
829 continue;
830 c = w * 256 + j * 8 + k;
831 len = SPRINTF((tmp, " %s", p_type(c)));
832 T(addstr(tmp, len, &buf, &buflen));
833 }
834 }
835 rdata += l;
836 }
837 break;
838 }
839
840 case ns_t_nsec: {
841 u_int w, l, j, k, c;
842
843 T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
844
845 while (rdata < edata) {
846 w = *rdata++;
847 l = *rdata++;
848 for (j = 0; j < l; j++) {
849 if (rdata[j] == 0)
850 continue;
851 for (k = 0; k < 8; k++) {
852 if ((rdata[j] & (0x80 >> k)) == 0)
853 continue;
854 c = w * 256 + j * 8 + k;
855 len = SPRINTF((tmp, " %s", p_type(c)));
856 T(addstr(tmp, len, &buf, &buflen));
857 }
858 }
859 rdata += l;
860 }
861 break;
862 }
863
864 case ns_t_dhcid: {
865 int n;
866 unsigned int siz;
867 char base64_dhcid[8192];
868 const char *leader;
869
870 siz = (edata-rdata)*4/3 + 4; /* "+4" accounts for trailing \0 */
871 if (siz > sizeof(base64_dhcid) * 3/4) {
872 const char *str = "record too long to print";
873 T(addstr(str, strlen(str), &buf, &buflen));
874 } else {
875 len = b64_ntop(rdata, edata-rdata, base64_dhcid, siz);
876
877 if (len < 0)
878 goto formerr;
879
880 else if (len > 15) {
881 T(addstr(" (", 2, &buf, &buflen));
882 leader = "\n\t\t";
883 spaced = 0;
884 }
885 else
886 leader = " ";
887
888 for (n = 0; n < len; n += 48) {
889 T(addstr(leader, strlen(leader),
890 &buf, &buflen));
891 T(addstr(base64_dhcid + n, MIN(len - n, 48),
892 &buf, &buflen));
893 }
894 if (len > 15)
895 T(addstr(" )", 2, &buf, &buflen));
896 }
897 break;
898 }
899
900 case ns_t_ipseckey: {
901 int n;
902 unsigned int siz;
903 char base64_key[8192];
904 const char *leader;
905
906 if (rdlen < 2)
907 goto formerr;
908
909 switch (rdata[1]) {
910 case 0:
911 case 3:
912 if (rdlen < 3)
913 goto formerr;
914 break;
915 case 1:
916 if (rdlen < 7)
917 goto formerr;
918 break;
919 case 2:
920 if (rdlen < 19)
921 goto formerr;
922 break;
923 default:
924 comment = "unknown IPSECKEY gateway type";
925 goto hexify;
926 }
927
928 len = SPRINTF((tmp, "%u ", *rdata));
929 T(addstr(tmp, len, &buf, &buflen));
930 rdata++;
931
932 len = SPRINTF((tmp, "%u ", *rdata));
933 T(addstr(tmp, len, &buf, &buflen));
934 rdata++;
935
936 len = SPRINTF((tmp, "%u ", *rdata));
937 T(addstr(tmp, len, &buf, &buflen));
938 rdata++;
939
940 switch (rdata[-2]) {
941 case 0:
942 T(addstr(".", 1, &buf, &buflen));
943 break;
944 case 1:
945 (void) inet_ntop(AF_INET, rdata, buf, buflen);
946 addlen(strlen(buf), &buf, &buflen);
947 rdata += 4;
948 break;
949 case 2:
950 (void) inet_ntop(AF_INET6, rdata, buf, buflen);
951 addlen(strlen(buf), &buf, &buflen);
952 rdata += 16;
953 break;
954 case 3:
955 T(addname(msg, msglen, &rdata, origin, &buf, &buflen));
956 break;
957 }
958
959 if (rdata >= edata)
960 break;
961
962 siz = (edata-rdata)*4/3 + 4; /* "+4" accounts for trailing \0 */
963 if (siz > sizeof(base64_key) * 3/4) {
964 const char *str = "record too long to print";
965 T(addstr(str, strlen(str), &buf, &buflen));
966 } else {
967 len = b64_ntop(rdata, edata-rdata, base64_key, siz);
968
969 if (len < 0)
970 goto formerr;
971
972 else if (len > 15) {
973 T(addstr(" (", 2, &buf, &buflen));
974 leader = "\n\t\t";
975 spaced = 0;
976 }
977 else
978 leader = " ";
979
980 for (n = 0; n < len; n += 48) {
981 T(addstr(leader, strlen(leader),
982 &buf, &buflen));
983 T(addstr(base64_key + n, MIN(len - n, 48),
984 &buf, &buflen));
985 }
986 if (len > 15)
987 T(addstr(" )", 2, &buf, &buflen));
988 }
989 break;
990 }
991
992 case ns_t_hip: {
993 unsigned int i, hip_len, algorithm, key_len;
994 char base64_key[NS_MD5RSA_MAX_BASE64];
995 unsigned int siz;
996 const char *leader = "\n\t\t\t\t\t";
997
998 hip_len = *rdata++;
999 algorithm = *rdata++;
1000 key_len = ns_get16(rdata);
1001 rdata += NS_INT16SZ;
1002
1003 siz = key_len*4/3 + 4; /* "+4" accounts for trailing \0 */
1004 if (siz > sizeof(base64_key) * 3/4) {
1005 const char *str = "record too long to print";
1006 T(addstr(str, strlen(str), &buf, &buflen));
1007 } else {
1008 len = sprintf(tmp, "( %u ", algorithm);
1009 T(addstr(tmp, len, &buf, &buflen));
1010
1011 for (i = 0; i < hip_len; i++) {
1012 len = sprintf(tmp, "%02X", *rdata);
1013 T(addstr(tmp, len, &buf, &buflen));
1014 rdata++;
1015 }
1016 T(addstr(leader, strlen(leader), &buf, &buflen));
1017
1018 len = b64_ntop(rdata, key_len, base64_key, siz);
1019 if (len < 0)
1020 goto formerr;
1021
1022 T(addstr(base64_key, len, &buf, &buflen));
1023
1024 rdata += key_len;
1025 while (rdata < edata) {
1026 T(addstr(leader, strlen(leader), &buf, &buflen));
1027 T(addname(msg, msglen, &rdata, origin,
1028 &buf, &buflen));
1029 }
1030 T(addstr(" )", 2, &buf, &buflen));
1031 }
1032 break;
1033 }
1034
1035 default:
1036 comment = "unknown RR type";
1037 goto hexify;
1038 }
1039 return (buf - obuf);
1040 formerr:
1041 comment = "RR format error";
1042 hexify: {
1043 int n, m;
1044 char *p;
1045
1046 len = SPRINTF((tmp, "\\# %u%s\t; %s", (unsigned)(edata - rdata),
1047 rdlen != 0U ? " (" : "", comment));
1048 T(addstr(tmp, len, &buf, &buflen));
1049 while (rdata < edata) {
1050 p = tmp;
1051 p += SPRINTF((p, "\n\t"));
1052 spaced = 0;
1053 n = MIN(16, edata - rdata);
1054 for (m = 0; m < n; m++)
1055 p += SPRINTF((p, "%02x ", rdata[m]));
1056 T(addstr(tmp, p - tmp, &buf, &buflen));
1057 if (n < 16) {
1058 T(addstr(")", 1, &buf, &buflen));
1059 T(addtab(p - tmp + 1, 48, spaced, &buf, &buflen));
1060 }
1061 p = tmp;
1062 p += SPRINTF((p, "; "));
1063 for (m = 0; m < n; m++)
1064 *p++ = (isascii(rdata[m]) && isprint(rdata[m]))
1065 ? rdata[m]
1066 : '.';
1067 T(addstr(tmp, p - tmp, &buf, &buflen));
1068 rdata += n;
1069 }
1070 return (buf - obuf);
1071 }
1072 }
1073
1074 /* Private. */
1075
1076 /*%
1077 * size_t
1078 * prune_origin(name, origin)
1079 * Find out if the name is at or under the current origin.
1080 * return:
1081 * Number of characters in name before start of origin,
1082 * or length of name if origin does not match.
1083 * notes:
1084 * This function should share code with samedomain().
1085 */
1086 static size_t
1087 prune_origin(const char *name, const char *origin) {
1088 const char *oname = name;
1089
1090 while (*name != '\0') {
1091 if (origin != NULL && ns_samename(name, origin) == 1)
1092 return (name - oname - (name > oname));
1093 while (*name != '\0') {
1094 if (*name == '\\') {
1095 name++;
1096 /* XXX need to handle \nnn form. */
1097 if (*name == '\0')
1098 break;
1099 } else if (*name == '.') {
1100 name++;
1101 break;
1102 }
1103 name++;
1104 }
1105 }
1106 return (name - oname);
1107 }
1108
1109 /*%
1110 * int
1111 * charstr(rdata, edata, buf, buflen)
1112 * Format a <character-string> into the presentation buffer.
1113 * return:
1114 * Number of rdata octets consumed
1115 * 0 for protocol format error
1116 * -1 for output buffer error
1117 * side effects:
1118 * buffer is advanced on success.
1119 */
1120 static int
1121 charstr(const u_char *rdata, const u_char *edata, char **buf, size_t *buflen) {
1122 const u_char *odata = rdata;
1123 size_t save_buflen = *buflen;
1124 char *save_buf = *buf;
1125
1126 if (addstr("\"", 1, buf, buflen) < 0)
1127 goto enospc;
1128 if (rdata < edata) {
1129 int n = *rdata;
1130
1131 if (rdata + 1 + n <= edata) {
1132 rdata++;
1133 while (n-- > 0) {
1134 if (strchr("\n\"\\", *rdata) != NULL)
1135 if (addstr("\\", 1, buf, buflen) < 0)
1136 goto enospc;
1137 if (addstr((const char *)rdata, 1,
1138 buf, buflen) < 0)
1139 goto enospc;
1140 rdata++;
1141 }
1142 }
1143 }
1144 if (addstr("\"", 1, buf, buflen) < 0)
1145 goto enospc;
1146 return (rdata - odata);
1147 enospc:
1148 errno = ENOSPC;
1149 *buf = save_buf;
1150 *buflen = save_buflen;
1151 return (-1);
1152 }
1153
1154 static int
1155 addname(const u_char *msg, size_t msglen,
1156 const u_char **pp, const char *origin,
1157 char **buf, size_t *buflen)
1158 {
1159 size_t newlen, save_buflen = *buflen;
1160 char *save_buf = *buf;
1161 int n;
1162
1163 n = dn_expand(msg, msg + msglen, *pp, *buf, *buflen);
1164 if (n < 0)
1165 goto enospc; /*%< Guess. */
1166 newlen = prune_origin(*buf, origin);
1167 if (**buf == '\0') {
1168 goto root;
1169 } else if (newlen == 0U) {
1170 /* Use "@" instead of name. */
1171 if (newlen + 2 > *buflen)
1172 goto enospc; /* No room for "@\0". */
1173 (*buf)[newlen++] = '@';
1174 (*buf)[newlen] = '\0';
1175 } else {
1176 if (((origin == NULL || origin[0] == '\0') ||
1177 (origin[0] != '.' && origin[1] != '\0' &&
1178 (*buf)[newlen] == '\0')) && (*buf)[newlen - 1] != '.') {
1179 /* No trailing dot. */
1180 root:
1181 if (newlen + 2 > *buflen)
1182 goto enospc; /* No room for ".\0". */
1183 (*buf)[newlen++] = '.';
1184 (*buf)[newlen] = '\0';
1185 }
1186 }
1187 *pp += n;
1188 addlen(newlen, buf, buflen);
1189 **buf = '\0';
1190 return (newlen);
1191 enospc:
1192 errno = ENOSPC;
1193 *buf = save_buf;
1194 *buflen = save_buflen;
1195 return (-1);
1196 }
1197
1198 static void
1199 addlen(size_t len, char **buf, size_t *buflen) {
1200 INSIST(len <= *buflen);
1201 *buf += len;
1202 *buflen -= len;
1203 }
1204
1205 static int
1206 addstr(const char *src, size_t len, char **buf, size_t *buflen) {
1207 if (len >= *buflen) {
1208 errno = ENOSPC;
1209 return (-1);
1210 }
1211 memcpy(*buf, src, len);
1212 addlen(len, buf, buflen);
1213 **buf = '\0';
1214 return (0);
1215 }
1216
1217 static int
1218 addtab(size_t len, size_t target, int spaced, char **buf, size_t *buflen) {
1219 size_t save_buflen = *buflen;
1220 char *save_buf = *buf;
1221 int t;
1222
1223 if (spaced || len >= target - 1) {
1224 T(addstr(" ", 2, buf, buflen));
1225 spaced = 1;
1226 } else {
1227 for (t = (target - len - 1) / 8; t >= 0; t--)
1228 if (addstr("\t", 1, buf, buflen) < 0) {
1229 *buflen = save_buflen;
1230 *buf = save_buf;
1231 return (-1);
1232 }
1233 spaced = 0;
1234 }
1235 return (spaced);
1236 }
1237
1238 /*! \file */