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vfs: check userland buffers before reading them.
[haiku.git] / src / kits / network / netresolv / resolv / res_debug.c
blob63a14c1ebccb8137076a8cb28af8a1aa440c7849
1 /* $NetBSD: res_debug.c,v 1.14 2015/02/24 17:56:20 christos Exp $ */
2
3 /*
4 * Portions Copyright (C) 2004, 2005, 2008, 2009 Internet Systems Consortium, Inc. ("ISC")
5 * Portions Copyright (C) 1996-2003 Internet Software Consortium.
6 *
7 * Permission to use, copy, modify, and/or distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
12 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
13 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
14 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
15 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
16 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
17 * PERFORMANCE OF THIS SOFTWARE.
18 */
19
20 /*
21 * Copyright (c) 1985
22 * The Regents of the University of California. All rights reserved.
23 *
24 * Redistribution and use in source and binary forms, with or without
25 * modification, are permitted provided that the following conditions
26 * are met:
27 * 1. Redistributions of source code must retain the above copyright
28 * notice, this list of conditions and the following disclaimer.
29 * 2. Redistributions in binary form must reproduce the above copyright
30 * notice, this list of conditions and the following disclaimer in the
31 * documentation and/or other materials provided with the distribution.
32 * 3. Neither the name of the University nor the names of its contributors
33 * may be used to endorse or promote products derived from this software
34 * without specific prior written permission.
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
37 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
39 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
40 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
41 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
42 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
43 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
44 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
45 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
46 * SUCH DAMAGE.
47 */
48
49 /*
50 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
51 *
52 * Permission to use, copy, modify, and distribute this software for any
53 * purpose with or without fee is hereby granted, provided that the above
54 * copyright notice and this permission notice appear in all copies, and that
55 * the name of Digital Equipment Corporation not be used in advertising or
56 * publicity pertaining to distribution of the document or software without
57 * specific, written prior permission.
58 *
59 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
60 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
61 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
62 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
63 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
64 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
65 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
66 * SOFTWARE.
67 */
68
69 /*
70 * Portions Copyright (c) 1995 by International Business Machines, Inc.
71 *
72 * International Business Machines, Inc. (hereinafter called IBM) grants
73 * permission under its copyrights to use, copy, modify, and distribute this
74 * Software with or without fee, provided that the above copyright notice and
75 * all paragraphs of this notice appear in all copies, and that the name of IBM
76 * not be used in connection with the marketing of any product incorporating
77 * the Software or modifications thereof, without specific, written prior
78 * permission.
79 *
80 * To the extent it has a right to do so, IBM grants an immunity from suit
81 * under its patents, if any, for the use, sale or manufacture of products to
82 * the extent that such products are used for performing Domain Name System
83 * dynamic updates in TCP/IP networks by means of the Software. No immunity is
84 * granted for any product per se or for any other function of any product.
85 *
86 * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES,
87 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
88 * PARTICULAR PURPOSE. IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL,
89 * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING
90 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN
91 * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES.
92 */
93
94 #if defined(LIBC_SCCS) && !defined(lint)
95 static const char sccsid[] = "@(#)res_debug.c 8.1 (Berkeley) 6/4/93";
96 static const char rcsid[] = "$Id: res_debug.c,v 1.19 2009/02/26 11:20:20 tbox Exp $";
97 #endif /* LIBC_SCCS and not lint */
98
99 #include "port_before.h"
100
101 #include <sys/types.h>
102 #include <sys/param.h>
103 #include <sys/socket.h>
104
105 #include <netinet/in.h>
106 #include <arpa/inet.h>
107 #include <arpa/nameser.h>
108
109 #include <assert.h>
110 #include <ctype.h>
111 #include <errno.h>
112 #include <math.h>
113 #include <netdb.h>
114 #include <resolv.h>
115 #include <resolv_mt.h>
116 #include <stdio.h>
117 #include <stdlib.h>
118 #include <string.h>
119 #include <time.h>
120
121 #include "port_after.h"
122
123 #ifdef SPRINTF_CHAR
124 # define SPRINTF(x) strlen(sprintf/**/x)
125 #else
126 # define SPRINTF(x) sprintf x
127 #endif
128
129 extern const char *_res_opcodes[];
130 extern const char *_res_sectioncodes[];
131
132 #if 0
133 #ifdef __weak_alias
134 __weak_alias(res_pquery,__res_pquery)
135 __weak_alias(res_nametoclass,__res_nametoclass)
136 __weak_alias(res_nametotype,__res_nametotype)
137 #endif
138 #endif
139
140 #ifndef _LIBC
141 /*%
142 * Print the current options.
143 */
144 void
145 fp_resstat(const res_state statp, FILE *file) {
146 u_long mask;
147
148 fprintf(file, ";; res options:");
149 for (mask = 1; mask != 0U; mask <<= 1)
150 if (statp->options & mask)
151 fprintf(file, " %s", p_option(mask));
152 putc('\n', file);
153 }
154 #endif
155
156 static void
157 do_section(const res_state statp,
158 ns_msg *handle, ns_sect section,
159 int pflag, FILE *file)
160 {
161 int n, sflag, rrnum;
162 static int buflen = 2048;
163 char *buf;
164 ns_opcode opcode;
165 ns_rr rr;
166
167 /*
168 * Print answer records.
169 */
170 sflag = (int)(statp->pfcode & pflag);
171 if (statp->pfcode && !sflag)
172 return;
173
174 buf = malloc((size_t)buflen);
175 if (buf == NULL) {
176 fprintf(file, ";; memory allocation failure\n");
177 return;
178 }
179
180 opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode);
181 rrnum = 0;
182 for (;;) {
183 if (ns_parserr(handle, section, rrnum, &rr)) {
184 if (errno != ENODEV)
185 fprintf(file, ";; ns_parserr: %s\n",
186 strerror(errno));
187 else if (rrnum > 0 && sflag != 0 &&
188 (statp->pfcode & RES_PRF_HEAD1))
189 putc('\n', file);
190 goto cleanup;
191 }
192 if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1))
193 fprintf(file, ";; %s SECTION:\n",
194 p_section(section, opcode));
195 if (section == ns_s_qd)
196 fprintf(file, ";;\t%s, type = %s, class = %s\n",
197 ns_rr_name(rr),
198 p_type(ns_rr_type(rr)),
199 p_class(ns_rr_class(rr)));
200 else if (section == ns_s_ar && ns_rr_type(rr) == ns_t_opt) {
201 size_t rdatalen, ttl;
202 uint16_t optcode, optlen;
203
204 rdatalen = ns_rr_rdlen(rr);
205 ttl = ns_rr_ttl(rr);
206
207 fprintf(file,
208 "; EDNS: version: %zu, udp=%u, flags=%04zx\n",
209 (ttl>>16)&0xff, ns_rr_class(rr), ttl&0xffff);
210
211 while (rdatalen >= 4) {
212 const u_char *cp = ns_rr_rdata(rr);
213 int i;
214
215 GETSHORT(optcode, cp);
216 GETSHORT(optlen, cp);
217
218 if (optcode == NS_OPT_NSID) {
219 fputs("; NSID: ", file);
220 if (optlen == 0) {
221 fputs("; NSID\n", file);
222 } else {
223 fputs("; NSID: ", file);
224 for (i = 0; i < optlen; i++)
225 fprintf(file, "%02x ",
226 cp[i]);
227 fputs(" (",file);
228 for (i = 0; i < optlen; i++)
229 fprintf(file, "%c",
230 isprint(cp[i])?
231 cp[i] : '.');
232 fputs(")\n", file);
233 }
234 } else {
235 if (optlen == 0) {
236 fprintf(file, "; OPT=%u\n",
237 optcode);
238 } else {
239 fprintf(file, "; OPT=%u: ",
240 optcode);
241 for (i = 0; i < optlen; i++)
242 fprintf(file, "%02x ",
243 cp[i]);
244 fputs(" (",file);
245 for (i = 0; i < optlen; i++)
246 fprintf(file, "%c",
247 isprint(cp[i]) ?
248 cp[i] : '.');
249 fputs(")\n", file);
250 }
251 }
252 rdatalen -= 4 + optlen;
253 }
254 } else {
255 n = ns_sprintrr(handle, &rr, NULL, NULL,
256 buf, (u_int)buflen);
257 if (n < 0) {
258 if (errno == ENOSPC) {
259 free(buf);
260 buf = NULL;
261 if (buflen < 131072)
262 buf = malloc((size_t)(buflen += 1024));
263 if (buf == NULL) {
264 fprintf(file,
265 ";; memory allocation failure\n");
266 return;
267 }
268 continue;
269 }
270 fprintf(file, ";; ns_sprintrr: %s\n",
271 strerror(errno));
272 goto cleanup;
273 }
274 fputs(buf, file);
275 fputc('\n', file);
276 }
277 rrnum++;
278 }
279 cleanup:
280 if (buf != NULL)
281 free(buf);
282 }
283
284 /*%
285 * Print the contents of a query.
286 * This is intended to be primarily a debugging routine.
287 */
288 void
289 res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) {
290 ns_msg handle;
291 int qdcount, ancount, nscount, arcount;
292 u_int opcode, rcode, id;
293
294 if (ns_initparse(msg, len, &handle) < 0) {
295 fprintf(file, ";; ns_initparse: %s\n", strerror(errno));
296 return;
297 }
298 opcode = ns_msg_getflag(handle, ns_f_opcode);
299 rcode = ns_msg_getflag(handle, ns_f_rcode);
300 id = ns_msg_id(handle);
301 qdcount = ns_msg_count(handle, ns_s_qd);
302 ancount = ns_msg_count(handle, ns_s_an);
303 nscount = ns_msg_count(handle, ns_s_ns);
304 arcount = ns_msg_count(handle, ns_s_ar);
305
306 /*
307 * Print header fields.
308 */
309 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode)
310 fprintf(file,
311 ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n",
312 _res_opcodes[opcode], p_rcode((int)rcode), id);
313 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX))
314 putc(';', file);
315 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) {
316 fprintf(file, "; flags:");
317 if (ns_msg_getflag(handle, ns_f_qr))
318 fprintf(file, " qr");
319 if (ns_msg_getflag(handle, ns_f_aa))
320 fprintf(file, " aa");
321 if (ns_msg_getflag(handle, ns_f_tc))
322 fprintf(file, " tc");
323 if (ns_msg_getflag(handle, ns_f_rd))
324 fprintf(file, " rd");
325 if (ns_msg_getflag(handle, ns_f_ra))
326 fprintf(file, " ra");
327 if (ns_msg_getflag(handle, ns_f_z))
328 fprintf(file, " ??");
329 if (ns_msg_getflag(handle, ns_f_ad))
330 fprintf(file, " ad");
331 if (ns_msg_getflag(handle, ns_f_cd))
332 fprintf(file, " cd");
333 }
334 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) {
335 fprintf(file, "; %s: %d",
336 p_section(ns_s_qd, (int)opcode), qdcount);
337 fprintf(file, ", %s: %d",
338 p_section(ns_s_an, (int)opcode), ancount);
339 fprintf(file, ", %s: %d",
340 p_section(ns_s_ns, (int)opcode), nscount);
341 fprintf(file, ", %s: %d",
342 p_section(ns_s_ar, (int)opcode), arcount);
343 }
344 if ((!statp->pfcode) || (statp->pfcode &
345 (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) {
346 putc('\n',file);
347 }
348 /*
349 * Print the various sections.
350 */
351 do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file);
352 do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file);
353 do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file);
354 do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file);
355 if (qdcount == 0 && ancount == 0 &&
356 nscount == 0 && arcount == 0)
357 putc('\n', file);
358 }
359
360 const u_char *
361 p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) {
362 char name[MAXDNAME];
363 int n;
364
365 if ((n = dn_expand(msg, msg + len, cp, name, (int)sizeof name)) < 0)
366 return (NULL);
367 if (name[0] == '\0')
368 putc('.', file);
369 else
370 fputs(name, file);
371 return (cp + n);
372 }
373
374 const u_char *
375 p_cdname(const u_char *cp, const u_char *msg, FILE *file) {
376 return (p_cdnname(cp, msg, PACKETSZ, file));
377 }
378
379 /*%
380 * Return a fully-qualified domain name from a compressed name (with
381 length supplied). */
382
383 const u_char *
384 p_fqnname(const u_char *cp, const u_char *msg, int msglen, char *name,
385 int namelen)
386 {
387 int n;
388 size_t newlen;
389
390 if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0)
391 return (NULL);
392 newlen = strlen(name);
393 if (newlen == 0 || name[newlen - 1] != '.') {
394 if ((int)newlen + 1 >= namelen) /*%< Lack space for final dot */
395 return (NULL);
396 else
397 strcpy(name + newlen, ".");
398 }
399 return (cp + n);
400 }
401
402 /* XXX: the rest of these functions need to become length-limited, too. */
403
404 const u_char *
405 p_fqname(const u_char *cp, const u_char *msg, FILE *file) {
406 char name[MAXDNAME];
407 const u_char *n;
408
409 n = p_fqnname(cp, msg, MAXCDNAME, name, (int)sizeof name);
410 if (n == NULL)
411 return (NULL);
412 fputs(name, file);
413 return (n);
414 }
415
416 /*%
417 * Names of RR classes and qclasses. Classes and qclasses are the same, except
418 * that C_ANY is a qclass but not a class. (You can ask for records of class
419 * C_ANY, but you can't have any records of that class in the database.)
420 */
421 const struct res_sym __p_class_syms[] = {
422 {C_IN, "IN", (char *)0},
423 {C_CHAOS, "CH", (char *)0},
424 {C_CHAOS, "CHAOS", (char *)0},
425 {C_HS, "HS", (char *)0},
426 {C_HS, "HESIOD", (char *)0},
427 {C_ANY, "ANY", (char *)0},
428 {C_NONE, "NONE", (char *)0},
429 {C_IN, (char *)0, (char *)0}
430 };
431
432 /*%
433 * Names of message sections.
434 */
435 const struct res_sym __p_default_section_syms[] = {
436 {ns_s_qd, "QUERY", (char *)0},
437 {ns_s_an, "ANSWER", (char *)0},
438 {ns_s_ns, "AUTHORITY", (char *)0},
439 {ns_s_ar, "ADDITIONAL", (char *)0},
440 {0, (char *)0, (char *)0}
441 };
442
443 const struct res_sym __p_update_section_syms[] = {
444 {S_ZONE, "ZONE", (char *)0},
445 {S_PREREQ, "PREREQUISITE", (char *)0},
446 {S_UPDATE, "UPDATE", (char *)0},
447 {S_ADDT, "ADDITIONAL", (char *)0},
448 {0, (char *)0, (char *)0}
449 };
450
451 const struct res_sym __p_key_syms[] = {
452 {NS_ALG_MD5RSA, "RSA", "RSA KEY with MD5 hash"},
453 {NS_ALG_DH, "DH", "Diffie Hellman"},
454 {NS_ALG_DSA, "DSA", "Digital Signature Algorithm"},
455 {NS_ALG_EXPIRE_ONLY, "EXPIREONLY", "No algorithm"},
456 {NS_ALG_PRIVATE_OID, "PRIVATE", "Algorithm obtained from OID"},
457 {0, NULL, NULL}
458 };
459
460 const struct res_sym __p_cert_syms[] = {
461 {cert_t_pkix, "PKIX", "PKIX (X.509v3) Certificate"},
462 {cert_t_spki, "SPKI", "SPKI certificate"},
463 {cert_t_pgp, "PGP", "PGP certificate"},
464 {cert_t_url, "URL", "URL Private"},
465 {cert_t_oid, "OID", "OID Private"},
466 {0, NULL, NULL}
467 };
468
469 /*%
470 * Names of RR types and qtypes. Types and qtypes are the same, except
471 * that T_ANY is a qtype but not a type. (You can ask for records of type
472 * T_ANY, but you can't have any records of that type in the database.)
473 */
474 const struct res_sym __p_type_syms[] = {
475 {ns_t_a, "A", "address"},
476 {ns_t_ns, "NS", "name server"},
477 {ns_t_md, "MD", "mail destination (deprecated)"},
478 {ns_t_mf, "MF", "mail forwarder (deprecated)"},
479 {ns_t_cname, "CNAME", "canonical name"},
480 {ns_t_soa, "SOA", "start of authority"},
481 {ns_t_mb, "MB", "mailbox"},
482 {ns_t_mg, "MG", "mail group member"},
483 {ns_t_mr, "MR", "mail rename"},
484 {ns_t_null, "NULL", "null"},
485 {ns_t_wks, "WKS", "well-known service (deprecated)"},
486 {ns_t_ptr, "PTR", "domain name pointer"},
487 {ns_t_hinfo, "HINFO", "host information"},
488 {ns_t_minfo, "MINFO", "mailbox information"},
489 {ns_t_mx, "MX", "mail exchanger"},
490 {ns_t_txt, "TXT", "text"},
491 {ns_t_rp, "RP", "responsible person"},
492 {ns_t_afsdb, "AFSDB", "DCE or AFS server"},
493 {ns_t_x25, "X25", "X25 address"},
494 {ns_t_isdn, "ISDN", "ISDN address"},
495 {ns_t_rt, "RT", "router"},
496 {ns_t_nsap, "NSAP", "nsap address"},
497 {ns_t_nsap_ptr, "NSAP_PTR", "domain name pointer"},
498 {ns_t_sig, "SIG", "signature"},
499 {ns_t_key, "KEY", "key"},
500 {ns_t_px, "PX", "mapping information"},
501 {ns_t_gpos, "GPOS", "geographical position (withdrawn)"},
502 {ns_t_aaaa, "AAAA", "IPv6 address"},
503 {ns_t_loc, "LOC", "location"},
504 {ns_t_nxt, "NXT", "next valid name (unimplemented)"},
505 {ns_t_eid, "EID", "endpoint identifier (unimplemented)"},
506 {ns_t_nimloc, "NIMLOC", "NIMROD locator (unimplemented)"},
507 {ns_t_srv, "SRV", "server selection"},
508 {ns_t_atma, "ATMA", "ATM address (unimplemented)"},
509 {ns_t_naptr, "NAPTR", "naptr"},
510 {ns_t_kx, "KX", "key exchange"},
511 {ns_t_cert, "CERT", "certificate"},
512 {ns_t_a6, "A", "IPv6 address (experminental)"},
513 {ns_t_dname, "DNAME", "non-terminal redirection"},
514 {ns_t_opt, "OPT", "opt"},
515 {ns_t_apl, "apl", "apl"},
516 {ns_t_ds, "DS", "delegation signer"},
517 {ns_t_sshfp, "SSFP", "SSH fingerprint"},
518 {ns_t_ipseckey, "IPSECKEY", "IPSEC key"},
519 {ns_t_rrsig, "RRSIG", "rrsig"},
520 {ns_t_nsec, "NSEC", "nsec"},
521 {ns_t_dnskey, "DNSKEY", "DNS key"},
522 {ns_t_dhcid, "DHCID", "dynamic host configuration identifier"},
523 {ns_t_nsec3, "NSEC3", "nsec3"},
524 {ns_t_nsec3param, "NSEC3PARAM", "NSEC3 parameters"},
525 {ns_t_hip, "HIP", "host identity protocol"},
526 {ns_t_spf, "SPF", "sender policy framework"},
527 {ns_t_tkey, "TKEY", "tkey"},
528 {ns_t_tsig, "TSIG", "transaction signature"},
529 {ns_t_ixfr, "IXFR", "incremental zone transfer"},
530 {ns_t_axfr, "AXFR", "zone transfer"},
531 {ns_t_zxfr, "ZXFR", "compressed zone transfer"},
532 {ns_t_mailb, "MAILB", "mailbox-related data (deprecated)"},
533 {ns_t_maila, "MAILA", "mail agent (deprecated)"},
534 {ns_t_naptr, "NAPTR", "URN Naming Authority"},
535 {ns_t_kx, "KX", "Key Exchange"},
536 {ns_t_cert, "CERT", "Certificate"},
537 {ns_t_a6, "A6", "IPv6 Address"},
538 {ns_t_dname, "DNAME", "dname"},
539 {ns_t_sink, "SINK", "Kitchen Sink (experimental)"},
540 {ns_t_opt, "OPT", "EDNS Options"},
541 {ns_t_any, "ANY", "\"any\""},
542 {ns_t_dlv, "DLV", "DNSSEC look-aside validation"},
543 {0, NULL, NULL}
544 };
545
546 /*%
547 * Names of DNS rcodes.
548 */
549 const struct res_sym __p_rcode_syms[] = {
550 {ns_r_noerror, "NOERROR", "no error"},
551 {ns_r_formerr, "FORMERR", "format error"},
552 {ns_r_servfail, "SERVFAIL", "server failed"},
553 {ns_r_nxdomain, "NXDOMAIN", "no such domain name"},
554 {ns_r_notimpl, "NOTIMP", "not implemented"},
555 {ns_r_refused, "REFUSED", "refused"},
556 {ns_r_yxdomain, "YXDOMAIN", "domain name exists"},
557 {ns_r_yxrrset, "YXRRSET", "rrset exists"},
558 {ns_r_nxrrset, "NXRRSET", "rrset doesn't exist"},
559 {ns_r_notauth, "NOTAUTH", "not authoritative"},
560 {ns_r_notzone, "NOTZONE", "Not in zone"},
561 {ns_r_max, "", ""},
562 {ns_r_badsig, "BADSIG", "bad signature"},
563 {ns_r_badkey, "BADKEY", "bad key"},
564 {ns_r_badtime, "BADTIME", "bad time"},
565 {0, NULL, NULL}
566 };
567
568 int
569 sym_ston(const struct res_sym *syms, const char *name, int *success) {
570 for (; syms->name != 0; syms++) {
571 if (strcasecmp (name, syms->name) == 0) {
572 if (success)
573 *success = 1;
574 return (syms->number);
575 }
576 }
577 if (success)
578 *success = 0;
579 return (syms->number); /*%< The default value. */
580 }
581
582 const char *
583 sym_ntos(const struct res_sym *syms, int number, int *success) {
584 char *unname = sym_ntos_unname;
585
586 for (; syms->name != 0; syms++) {
587 if (number == syms->number) {
588 if (success)
589 *success = 1;
590 return (syms->name);
591 }
592 }
593
594 sprintf(unname, "%d", number); /*%< XXX nonreentrant */
595 if (success)
596 *success = 0;
597 return (unname);
598 }
599
600 const char *
601 sym_ntop(const struct res_sym *syms, int number, int *success) {
602 char *unname = sym_ntop_unname;
603
604 for (; syms->name != 0; syms++) {
605 if (number == syms->number) {
606 if (success)
607 *success = 1;
608 return (syms->humanname);
609 }
610 }
611 sprintf(unname, "%d", number); /*%< XXX nonreentrant */
612 if (success)
613 *success = 0;
614 return (unname);
615 }
616
617 /*%
618 * Return a string for the type.
619 */
620 const char *
621 p_type(int type) {
622 int success;
623 const char *result;
624 static char typebuf[20];
625
626 result = sym_ntos(__p_type_syms, type, &success);
627 if (success)
628 return (result);
629 if (type < 0 || type > 0xffff)
630 return ("BADTYPE");
631 sprintf(typebuf, "TYPE%d", type);
632 return (typebuf);
633 }
634
635 /*%
636 * Return a string for the type.
637 */
638 const char *
639 p_section(int section, int opcode) {
640 const struct res_sym *symbols;
641
642 switch (opcode) {
643 case ns_o_update:
644 symbols = __p_update_section_syms;
645 break;
646 default:
647 symbols = __p_default_section_syms;
648 break;
649 }
650 return (sym_ntos(symbols, section, (int *)0));
651 }
652
653 /*%
654 * Return a mnemonic for class.
655 */
656 const char *
657 p_class(int class) {
658 int success;
659 const char *result;
660 static char classbuf[20];
661
662 result = sym_ntos(__p_class_syms, class, &success);
663 if (success)
664 return (result);
665 if (class < 0 || class > 0xffff)
666 return ("BADCLASS");
667 sprintf(classbuf, "CLASS%d", class);
668 return (classbuf);
669 }
670
671 /*%
672 * Return a mnemonic for an option
673 */
674 const char *
675 p_option(u_long option) {
676 char *nbuf = p_option_nbuf;
677
678 switch (option) {
679 case RES_INIT: return "init";
680 case RES_DEBUG: return "debug";
681 case RES_AAONLY: return "aaonly(unimpl)";
682 case RES_USEVC: return "usevc";
683 case RES_PRIMARY: return "primry(unimpl)";
684 case RES_IGNTC: return "igntc";
685 case RES_RECURSE: return "recurs";
686 case RES_DEFNAMES: return "defnam";
687 case RES_STAYOPEN: return "styopn";
688 case RES_DNSRCH: return "dnsrch";
689 case RES_INSECURE1: return "insecure1";
690 case RES_INSECURE2: return "insecure2";
691 case RES_NOALIASES: return "noaliases";
692 case RES_USE_INET6: return "inet6";
693 case RES_USE_INET4: return "inet4";
694 #ifdef RES_USE_EDNS0 /*%< KAME extension */
695 case RES_USE_EDNS0: return "edns0";
696 case RES_NSID: return "nsid";
697 #endif
698 #ifdef RES_USE_DNAME
699 case RES_USE_DNAME: return "dname";
700 #endif
701 #ifdef RES_USE_DNSSEC
702 case RES_USE_DNSSEC: return "dnssec";
703 #endif
704 #ifdef RES_NOTLDQUERY
705 case RES_NOTLDQUERY: return "no-tld-query";
706 #endif
707 #ifdef RES_NO_NIBBLE2
708 case RES_NO_NIBBLE2: return "no-nibble2";
709 #endif
710 /* XXX nonreentrant */
711 default: sprintf(nbuf, "?0x%lx?", (u_long)option);
712 return (nbuf);
713 }
714 }
715
716 /*%
717 * Return a mnemonic for a time to live.
718 */
719 const char *
720 p_time(u_int32_t value) {
721 char *nbuf = p_time_nbuf;
722
723 if (ns_format_ttl((u_long)value, nbuf, sizeof nbuf) < 0)
724 sprintf(nbuf, "%u", value);
725 return (nbuf);
726 }
727
728 /*%
729 * Return a string for the rcode.
730 */
731 const char *
732 p_rcode(int rcode) {
733 return (sym_ntos(__p_rcode_syms, rcode, (int *)0));
734 }
735
736 /*%
737 * Return a string for a res_sockaddr_union.
738 */
739 const char *
740 p_sockun(union res_sockaddr_union u, char *buf, size_t size) {
741 char ret[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:123.123.123.123"];
742
743 switch (u.sin.sin_family) {
744 case AF_INET:
745 inet_ntop(AF_INET, &u.sin.sin_addr, ret, (socklen_t)sizeof ret);
746 break;
747 #ifdef HAS_INET6_STRUCTS
748 case AF_INET6:
749 inet_ntop(AF_INET6, &u.sin6.sin6_addr, ret, sizeof ret);
750 break;
751 #endif
752 default:
753 sprintf(ret, "[af%d]", u.sin.sin_family);
754 break;
755 }
756 if (size > 0U) {
757 strncpy(buf, ret, size - 1);
758 buf[size - 1] = '0';
759 }
760 return (buf);
761 }
762
763 /*%
764 * routines to convert between on-the-wire RR format and zone file format.
765 * Does not contain conversion to/from decimal degrees; divide or multiply
766 * by 60*60*1000 for that.
767 */
768
769 static unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000,
770 1000000,10000000,100000000,1000000000};
771
772 /*% takes an XeY precision/size value, returns a string representation. */
773 static const char *
774 precsize_ntoa(u_int32_t prec)
775 {
776 char *retbuf = precsize_ntoa_retbuf;
777 unsigned long val;
778 int mantissa, exponent;
779
780 mantissa = (int)((prec >> 4) & 0x0f) % 10;
781 exponent = (int)((prec >> 0) & 0x0f) % 10;
782
783 val = mantissa * poweroften[exponent];
784
785 (void) sprintf(retbuf, "%lu.%.2lu", val/100, val%100);
786 return (retbuf);
787 }
788
789 /*% converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */
790 static u_int8_t
791 precsize_aton(const char **strptr) {
792 unsigned int mval = 0, cmval = 0;
793 u_int8_t retval = 0;
794 const char *cp;
795 int exponent;
796 int mantissa;
797
798 cp = *strptr;
799
800 while (isdigit((unsigned char)*cp))
801 mval = mval * 10 + (*cp++ - '0');
802
803 if (*cp == '.') { /*%< centimeters */
804 cp++;
805 if (isdigit((unsigned char)*cp)) {
806 cmval = (*cp++ - '0') * 10;
807 if (isdigit((unsigned char)*cp)) {
808 cmval += (*cp++ - '0');
809 }
810 }
811 }
812 cmval = (mval * 100) + cmval;
813
814 for (exponent = 0; exponent < 9; exponent++)
815 if (cmval < poweroften[exponent+1])
816 break;
817
818 mantissa = cmval / poweroften[exponent];
819 if (mantissa > 9)
820 mantissa = 9;
821
822 retval = (mantissa << 4) | exponent;
823
824 *strptr = cp;
825
826 return (retval);
827 }
828
829 /*% converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */
830 static u_int32_t
831 latlon2ul(const char **latlonstrptr, int *which) {
832 const char *cp;
833 u_int32_t retval;
834 int deg = 0, min = 0, secs = 0, secsfrac = 0;
835
836 cp = *latlonstrptr;
837
838 while (isdigit((unsigned char)*cp))
839 deg = deg * 10 + (*cp++ - '0');
840
841 while (isspace((unsigned char)*cp))
842 cp++;
843
844 if (!(isdigit((unsigned char)*cp)))
845 goto fndhemi;
846
847 while (isdigit((unsigned char)*cp))
848 min = min * 10 + (*cp++ - '0');
849
850 while (isspace((unsigned char)*cp))
851 cp++;
852
853 if (!(isdigit((unsigned char)*cp)))
854 goto fndhemi;
855
856 while (isdigit((unsigned char)*cp))
857 secs = secs * 10 + (*cp++ - '0');
858
859 if (*cp == '.') { /*%< decimal seconds */
860 cp++;
861 if (isdigit((unsigned char)*cp)) {
862 secsfrac = (*cp++ - '0') * 100;
863 if (isdigit((unsigned char)*cp)) {
864 secsfrac += (*cp++ - '0') * 10;
865 if (isdigit((unsigned char)*cp)) {
866 secsfrac += (*cp++ - '0');
867 }
868 }
869 }
870 }
871
872 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */
873 cp++;
874
875 while (isspace((unsigned char)*cp))
876 cp++;
877
878 fndhemi:
879 switch (*cp) {
880 case 'N': case 'n':
881 case 'E': case 'e':
882 retval = ((unsigned)1<<31)
883 + (((((deg * 60) + min) * 60) + secs) * 1000)
884 + secsfrac;
885 break;
886 case 'S': case 's':
887 case 'W': case 'w':
888 retval = ((unsigned)1<<31)
889 - (((((deg * 60) + min) * 60) + secs) * 1000)
890 - secsfrac;
891 break;
892 default:
893 retval = 0; /*%< invalid value -- indicates error */
894 break;
895 }
896
897 switch (*cp) {
898 case 'N': case 'n':
899 case 'S': case 's':
900 *which = 1; /*%< latitude */
901 break;
902 case 'E': case 'e':
903 case 'W': case 'w':
904 *which = 2; /*%< longitude */
905 break;
906 default:
907 *which = 0; /*%< error */
908 break;
909 }
910
911 cp++; /*%< skip the hemisphere */
912 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */
913 cp++;
914
915 while (isspace((unsigned char)*cp)) /*%< move to next field */
916 cp++;
917
918 *latlonstrptr = cp;
919
920 return (retval);
921 }
922
923 /*%
924 * converts a zone file representation in a string to an RDATA on-the-wire
925 * representation. */
926 int
927 loc_aton(const char *ascii, u_char *binary)
928 {
929 const char *cp, *maxcp;
930 u_char *bcp;
931
932 u_int32_t latit = 0, longit = 0, alt = 0;
933 u_int32_t lltemp1 = 0, lltemp2 = 0;
934 int altmeters = 0, altfrac = 0, altsign = 1;
935 u_int8_t hp = 0x16; /*%< default = 1e6 cm = 10000.00m = 10km */
936 u_int8_t vp = 0x13; /*%< default = 1e3 cm = 10.00m */
937 u_int8_t siz = 0x12; /*%< default = 1e2 cm = 1.00m */
938 int which1 = 0, which2 = 0;
939
940 cp = ascii;
941 maxcp = cp + strlen(ascii);
942
943 lltemp1 = latlon2ul(&cp, &which1);
944
945 lltemp2 = latlon2ul(&cp, &which2);
946
947 switch (which1 + which2) {
948 case 3: /*%< 1 + 2, the only valid combination */
949 if ((which1 == 1) && (which2 == 2)) { /*%< normal case */
950 latit = lltemp1;
951 longit = lltemp2;
952 } else if ((which1 == 2) && (which2 == 1)) { /*%< reversed */
953 longit = lltemp1;
954 latit = lltemp2;
955 } else { /*%< some kind of brokenness */
956 return (0);
957 }
958 break;
959 default: /*%< we didn't get one of each */
960 return (0);
961 }
962
963 /* altitude */
964 if (*cp == '-') {
965 altsign = -1;
966 cp++;
967 }
968
969 if (*cp == '+')
970 cp++;
971
972 while (isdigit((unsigned char)*cp))
973 altmeters = altmeters * 10 + (*cp++ - '0');
974
975 if (*cp == '.') { /*%< decimal meters */
976 cp++;
977 if (isdigit((unsigned char)*cp)) {
978 altfrac = (*cp++ - '0') * 10;
979 if (isdigit((unsigned char)*cp)) {
980 altfrac += (*cp++ - '0');
981 }
982 }
983 }
984
985 alt = (10000000 + (altsign * (altmeters * 100 + altfrac)));
986
987 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */
988 cp++;
989
990 while (isspace((unsigned char)*cp) && (cp < maxcp))
991 cp++;
992
993 if (cp >= maxcp)
994 goto defaults;
995
996 siz = precsize_aton(&cp);
997
998 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */
999 cp++;
1000
1001 while (isspace((unsigned char)*cp) && (cp < maxcp))
1002 cp++;
1003
1004 if (cp >= maxcp)
1005 goto defaults;
1006
1007 hp = precsize_aton(&cp);
1008
1009 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */
1010 cp++;
1011
1012 while (isspace((unsigned char)*cp) && (cp < maxcp))
1013 cp++;
1014
1015 if (cp >= maxcp)
1016 goto defaults;
1017
1018 vp = precsize_aton(&cp);
1019
1020 defaults:
1021
1022 bcp = binary;
1023 *bcp++ = (u_int8_t) 0; /*%< version byte */
1024 *bcp++ = siz;
1025 *bcp++ = hp;
1026 *bcp++ = vp;
1027 PUTLONG(latit,bcp);
1028 PUTLONG(longit,bcp);
1029 PUTLONG(alt,bcp);
1030
1031 return (16); /*%< size of RR in octets */
1032 }
1033
1034 /*% takes an on-the-wire LOC RR and formats it in a human readable format. */
1035 const char *
1036 loc_ntoa(const u_char *binary, char *ascii)
1037 {
1038 static const char *error = "?";
1039 static char tmpbuf[sizeof
1040 "1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"];
1041 const u_char *cp = binary;
1042
1043 int latdeg, latmin, latsec, latsecfrac;
1044 int longdeg, longmin, longsec, longsecfrac;
1045 char northsouth, eastwest;
1046 const char *altsign;
1047 int altmeters, altfrac;
1048
1049 const u_int32_t referencealt = 100000 * 100;
1050
1051 int32_t latval, longval, altval;
1052 u_int32_t templ;
1053 u_int8_t sizeval, hpval, vpval, versionval;
1054
1055 char *sizestr, *hpstr, *vpstr;
1056
1057 versionval = *cp++;
1058
1059 if (ascii == NULL)
1060 ascii = tmpbuf;
1061
1062 if (versionval) {
1063 (void) sprintf(ascii, "; error: unknown LOC RR version");
1064 return (ascii);
1065 }
1066
1067 sizeval = *cp++;
1068
1069 hpval = *cp++;
1070 vpval = *cp++;
1071
1072 GETLONG(templ, cp);
1073 latval = (templ - ((unsigned)1<<31));
1074
1075 GETLONG(templ, cp);
1076 longval = (templ - ((unsigned)1<<31));
1077
1078 GETLONG(templ, cp);
1079 if (templ < referencealt) { /*%< below WGS 84 spheroid */
1080 altval = referencealt - templ;
1081 altsign = "-";
1082 } else {
1083 altval = templ - referencealt;
1084 altsign = "";
1085 }
1086
1087 if (latval < 0) {
1088 northsouth = 'S';
1089 latval = -latval;
1090 } else
1091 northsouth = 'N';
1092
1093 latsecfrac = latval % 1000;
1094 latval = latval / 1000;
1095 latsec = latval % 60;
1096 latval = latval / 60;
1097 latmin = latval % 60;
1098 latval = latval / 60;
1099 latdeg = latval;
1100
1101 if (longval < 0) {
1102 eastwest = 'W';
1103 longval = -longval;
1104 } else
1105 eastwest = 'E';
1106
1107 longsecfrac = longval % 1000;
1108 longval = longval / 1000;
1109 longsec = longval % 60;
1110 longval = longval / 60;
1111 longmin = longval % 60;
1112 longval = longval / 60;
1113 longdeg = longval;
1114
1115 altfrac = altval % 100;
1116 altmeters = (altval / 100);
1117
1118 sizestr = strdup(precsize_ntoa((u_int32_t)sizeval));
1119 hpstr = strdup(precsize_ntoa((u_int32_t)hpval));
1120 vpstr = strdup(precsize_ntoa((u_int32_t)vpval));
1121
1122 sprintf(ascii,
1123 "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm",
1124 latdeg, latmin, latsec, latsecfrac, northsouth,
1125 longdeg, longmin, longsec, longsecfrac, eastwest,
1126 altsign, altmeters, altfrac,
1127 (sizestr != NULL) ? sizestr : error,
1128 (hpstr != NULL) ? hpstr : error,
1129 (vpstr != NULL) ? vpstr : error);
1130
1131 if (sizestr != NULL)
1132 free(sizestr);
1133 if (hpstr != NULL)
1134 free(hpstr);
1135 if (vpstr != NULL)
1136 free(vpstr);
1137
1138 return (ascii);
1139 }
1140
1141
1142 /*% Return the number of DNS hierarchy levels in the name. */
1143 int
1144 dn_count_labels(const char *name) {
1145 size_t len, i, count;
1146
1147 len = strlen(name);
1148 for (i = 0, count = 0; i < len; i++) {
1149 /* XXX need to check for \. or use named's nlabels(). */
1150 if (name[i] == '.')
1151 count++;
1152 }
1153
1154 /* don't count initial wildcard */
1155 if (name[0] == '*')
1156 if (count)
1157 count--;
1158
1159 /* don't count the null label for root. */
1160 /* if terminating '.' not found, must adjust */
1161 /* count to include last label */
1162 if (len > 0 && name[len-1] != '.')
1163 count++;
1164 assert(count <= (size_t)INT_MAX);
1165 return (int)count;
1166 }
1167
1168 /*%
1169 * Make dates expressed in seconds-since-Jan-1-1970 easy to read.
1170 * SIG records are required to be printed like this, by the Secure DNS RFC.
1171 */
1172 char *
1173 p_secstodate (u_long secs) {
1174 /* XXX nonreentrant */
1175 char *output = p_secstodate_output;
1176 time_t myclock = secs;
1177 struct tm *mytime;
1178 #ifdef HAVE_TIME_R
1179 struct tm res;
1180
1181 mytime = gmtime_r(&myclock, &res);
1182 #else
1183 mytime = gmtime(&myclock);
1184 #endif
1185 mytime->tm_year += 1900;
1186 mytime->tm_mon += 1;
1187 sprintf(output, "%04d%02d%02d%02d%02d%02d",
1188 mytime->tm_year, mytime->tm_mon, mytime->tm_mday,
1189 mytime->tm_hour, mytime->tm_min, mytime->tm_sec);
1190 return (output);
1191 }
1192
1193 u_int16_t
1194 res_nametoclass(const char *buf, int *successp) {
1195 unsigned long result;
1196 char *endptr;
1197 int success;
1198
1199 result = sym_ston(__p_class_syms, buf, &success);
1200 if (success)
1201 goto done;
1202
1203 if (strncasecmp(buf, "CLASS", 5) != 0 ||
1204 !isdigit((unsigned char)buf[5]))
1205 goto done;
1206 errno = 0;
1207 result = strtoul(buf + 5, &endptr, 10);
1208 if (errno == 0 && *endptr == '\0' && result <= 0xffffU)
1209 success = 1;
1210 done:
1211 if (successp)
1212 *successp = success;
1213 return (u_int16_t)(result);
1214 }
1215
1216 u_int16_t
1217 res_nametotype(const char *buf, int *successp) {
1218 unsigned long result;
1219 char *endptr;
1220 int success;
1221
1222 result = sym_ston(__p_type_syms, buf, &success);
1223 if (success)
1224 goto done;
1225
1226 if (strncasecmp(buf, "type", 4) != 0 ||
1227 !isdigit((unsigned char)buf[4]))
1228 goto done;
1229 errno = 0;
1230 result = strtoul(buf + 4, &endptr, 10);
1231 if (errno == 0 && *endptr == '\0' && result <= 0xffffU)
1232 success = 1;
1233 done:
1234 if (successp)
1235 *successp = success;
1236 return (u_int16_t)(result);
1237 }
1238
1239 /*! \file */
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