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[minix.git] / lib / libc / resolv / res_debug.c
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1 /* $NetBSD: res_debug.c,v 1.13 2012/06/25 22:32:45 abs 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. All advertising materials mentioning features or use of this software
33 * must display the following acknowledgement:
34 * This product includes software developed by the University of
35 * California, Berkeley and its contributors.
36 * 4. Neither the name of the University nor the names of its contributors
37 * may be used to endorse or promote products derived from this software
38 * without specific prior written permission.
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 */
52
53 /*
54 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
55 *
56 * Permission to use, copy, modify, and distribute this software for any
57 * purpose with or without fee is hereby granted, provided that the above
58 * copyright notice and this permission notice appear in all copies, and that
59 * the name of Digital Equipment Corporation not be used in advertising or
60 * publicity pertaining to distribution of the document or software without
61 * specific, written prior permission.
62 *
63 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
64 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
65 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
66 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
67 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
68 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
69 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
70 * SOFTWARE.
71 */
72
73 /*
74 * Portions Copyright (c) 1995 by International Business Machines, Inc.
75 *
76 * International Business Machines, Inc. (hereinafter called IBM) grants
77 * permission under its copyrights to use, copy, modify, and distribute this
78 * Software with or without fee, provided that the above copyright notice and
79 * all paragraphs of this notice appear in all copies, and that the name of IBM
80 * not be used in connection with the marketing of any product incorporating
81 * the Software or modifications thereof, without specific, written prior
82 * permission.
83 *
84 * To the extent it has a right to do so, IBM grants an immunity from suit
85 * under its patents, if any, for the use, sale or manufacture of products to
86 * the extent that such products are used for performing Domain Name System
87 * dynamic updates in TCP/IP networks by means of the Software. No immunity is
88 * granted for any product per se or for any other function of any product.
89 *
90 * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES,
91 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
92 * PARTICULAR PURPOSE. IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL,
93 * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING
94 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN
95 * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES.
96 */
97
98 #include <sys/cdefs.h>
99 #if defined(LIBC_SCCS) && !defined(lint)
100 #ifdef notdef
101 static const char sccsid[] = "@(#)res_debug.c 8.1 (Berkeley) 6/4/93";
102 static const char rcsid[] = "Id: res_debug.c,v 1.19 2009/02/26 11:20:20 tbox Exp";
103 #else
104 __RCSID("$NetBSD: res_debug.c,v 1.13 2012/06/25 22:32:45 abs Exp $");
105 #endif
106 #endif /* LIBC_SCCS and not lint */
107
108 #include "port_before.h"
109
110 #include "namespace.h"
111 #include <sys/types.h>
112 #include <sys/param.h>
113 #include <sys/socket.h>
114
115 #include <netinet/in.h>
116 #include <arpa/inet.h>
117 #include <arpa/nameser.h>
118
119 #include <assert.h>
120 #include <ctype.h>
121 #include <errno.h>
122 #include <math.h>
123 #include <netdb.h>
124 #include <resolv.h>
125 #include <resolv_mt.h>
126 #include <stdio.h>
127 #include <stdlib.h>
128 #include <string.h>
129 #include <time.h>
130
131 #include "port_after.h"
132
133 #ifdef SPRINTF_CHAR
134 # define SPRINTF(x) strlen(sprintf/**/x)
135 #else
136 # define SPRINTF(x) sprintf x
137 #endif
138
139 extern const char *_res_opcodes[];
140 extern const char *_res_sectioncodes[];
141
142 #if 0
143 #ifdef __weak_alias
144 __weak_alias(res_pquery,__res_pquery)
145 __weak_alias(res_nametoclass,__res_nametoclass)
146 __weak_alias(res_nametotype,__res_nametotype)
147 #endif
148 #endif
149
150 #ifndef _LIBC
151 /*%
152 * Print the current options.
153 */
154 void
155 fp_resstat(const res_state statp, FILE *file) {
156 u_long mask;
157
158 fprintf(file, ";; res options:");
159 for (mask = 1; mask != 0U; mask <<= 1)
160 if (statp->options & mask)
161 fprintf(file, " %s", p_option(mask));
162 putc('\n', file);
163 }
164 #endif
165
166 static void
167 do_section(const res_state statp,
168 ns_msg *handle, ns_sect section,
169 int pflag, FILE *file)
170 {
171 int n, sflag, rrnum;
172 static int buflen = 2048;
173 char *buf;
174 ns_opcode opcode;
175 ns_rr rr;
176
177 /*
178 * Print answer records.
179 */
180 sflag = (int)(statp->pfcode & pflag);
181 if (statp->pfcode && !sflag)
182 return;
183
184 buf = malloc((size_t)buflen);
185 if (buf == NULL) {
186 fprintf(file, ";; memory allocation failure\n");
187 return;
188 }
189
190 opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode);
191 rrnum = 0;
192 for (;;) {
193 if (ns_parserr(handle, section, rrnum, &rr)) {
194 if (errno != ENODEV)
195 fprintf(file, ";; ns_parserr: %s\n",
196 strerror(errno));
197 else if (rrnum > 0 && sflag != 0 &&
198 (statp->pfcode & RES_PRF_HEAD1))
199 putc('\n', file);
200 goto cleanup;
201 }
202 if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1))
203 fprintf(file, ";; %s SECTION:\n",
204 p_section(section, opcode));
205 if (section == ns_s_qd)
206 fprintf(file, ";;\t%s, type = %s, class = %s\n",
207 ns_rr_name(rr),
208 p_type(ns_rr_type(rr)),
209 p_class(ns_rr_class(rr)));
210 else if (section == ns_s_ar && ns_rr_type(rr) == ns_t_opt) {
211 size_t rdatalen, ttl;
212 uint16_t optcode, optlen;
213
214 rdatalen = ns_rr_rdlen(rr);
215 ttl = ns_rr_ttl(rr);
216
217 fprintf(file,
218 "; EDNS: version: %zu, udp=%u, flags=%04zx\n",
219 (ttl>>16)&0xff, ns_rr_class(rr), ttl&0xffff);
220
221 while (rdatalen >= 4) {
222 const u_char *cp = ns_rr_rdata(rr);
223 int i;
224
225 GETSHORT(optcode, cp);
226 GETSHORT(optlen, cp);
227
228 if (optcode == NS_OPT_NSID) {
229 fputs("; NSID: ", file);
230 if (optlen == 0) {
231 fputs("; NSID\n", file);
232 } else {
233 fputs("; NSID: ", file);
234 for (i = 0; i < optlen; i++)
235 fprintf(file, "%02x ",
236 cp[i]);
237 fputs(" (",file);
238 for (i = 0; i < optlen; i++)
239 fprintf(file, "%c",
240 isprint(cp[i])?
241 cp[i] : '.');
242 fputs(")\n", file);
243 }
244 } else {
245 if (optlen == 0) {
246 fprintf(file, "; OPT=%u\n",
247 optcode);
248 } else {
249 fprintf(file, "; OPT=%u: ",
250 optcode);
251 for (i = 0; i < optlen; i++)
252 fprintf(file, "%02x ",
253 cp[i]);
254 fputs(" (",file);
255 for (i = 0; i < optlen; i++)
256 fprintf(file, "%c",
257 isprint(cp[i]) ?
258 cp[i] : '.');
259 fputs(")\n", file);
260 }
261 }
262 rdatalen -= 4 + optlen;
263 }
264 } else {
265 n = ns_sprintrr(handle, &rr, NULL, NULL,
266 buf, (u_int)buflen);
267 if (n < 0) {
268 if (errno == ENOSPC) {
269 free(buf);
270 buf = NULL;
271 if (buflen < 131072)
272 buf = malloc((size_t)(buflen += 1024));
273 if (buf == NULL) {
274 fprintf(file,
275 ";; memory allocation failure\n");
276 return;
277 }
278 continue;
279 }
280 fprintf(file, ";; ns_sprintrr: %s\n",
281 strerror(errno));
282 goto cleanup;
283 }
284 fputs(buf, file);
285 fputc('\n', file);
286 }
287 rrnum++;
288 }
289 cleanup:
290 if (buf != NULL)
291 free(buf);
292 }
293
294 /*%
295 * Print the contents of a query.
296 * This is intended to be primarily a debugging routine.
297 */
298 void
299 res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) {
300 ns_msg handle;
301 int qdcount, ancount, nscount, arcount;
302 u_int opcode, rcode, id;
303
304 if (ns_initparse(msg, len, &handle) < 0) {
305 fprintf(file, ";; ns_initparse: %s\n", strerror(errno));
306 return;
307 }
308 opcode = ns_msg_getflag(handle, ns_f_opcode);
309 rcode = ns_msg_getflag(handle, ns_f_rcode);
310 id = ns_msg_id(handle);
311 qdcount = ns_msg_count(handle, ns_s_qd);
312 ancount = ns_msg_count(handle, ns_s_an);
313 nscount = ns_msg_count(handle, ns_s_ns);
314 arcount = ns_msg_count(handle, ns_s_ar);
315
316 /*
317 * Print header fields.
318 */
319 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode)
320 fprintf(file,
321 ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n",
322 _res_opcodes[opcode], p_rcode((int)rcode), id);
323 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX))
324 putc(';', file);
325 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) {
326 fprintf(file, "; flags:");
327 if (ns_msg_getflag(handle, ns_f_qr))
328 fprintf(file, " qr");
329 if (ns_msg_getflag(handle, ns_f_aa))
330 fprintf(file, " aa");
331 if (ns_msg_getflag(handle, ns_f_tc))
332 fprintf(file, " tc");
333 if (ns_msg_getflag(handle, ns_f_rd))
334 fprintf(file, " rd");
335 if (ns_msg_getflag(handle, ns_f_ra))
336 fprintf(file, " ra");
337 if (ns_msg_getflag(handle, ns_f_z))
338 fprintf(file, " ??");
339 if (ns_msg_getflag(handle, ns_f_ad))
340 fprintf(file, " ad");
341 if (ns_msg_getflag(handle, ns_f_cd))
342 fprintf(file, " cd");
343 }
344 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) {
345 fprintf(file, "; %s: %d",
346 p_section(ns_s_qd, (int)opcode), qdcount);
347 fprintf(file, ", %s: %d",
348 p_section(ns_s_an, (int)opcode), ancount);
349 fprintf(file, ", %s: %d",
350 p_section(ns_s_ns, (int)opcode), nscount);
351 fprintf(file, ", %s: %d",
352 p_section(ns_s_ar, (int)opcode), arcount);
353 }
354 if ((!statp->pfcode) || (statp->pfcode &
355 (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) {
356 putc('\n',file);
357 }
358 /*
359 * Print the various sections.
360 */
361 do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file);
362 do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file);
363 do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file);
364 do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file);
365 if (qdcount == 0 && ancount == 0 &&
366 nscount == 0 && arcount == 0)
367 putc('\n', file);
368 }
369
370 const u_char *
371 p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) {
372 char name[MAXDNAME];
373 int n;
374
375 if ((n = dn_expand(msg, msg + len, cp, name, (int)sizeof name)) < 0)
376 return (NULL);
377 if (name[0] == '\0')
378 putc('.', file);
379 else
380 fputs(name, file);
381 return (cp + n);
382 }
383
384 const u_char *
385 p_cdname(const u_char *cp, const u_char *msg, FILE *file) {
386 return (p_cdnname(cp, msg, PACKETSZ, file));
387 }
388
389 /*%
390 * Return a fully-qualified domain name from a compressed name (with
391 length supplied). */
392
393 const u_char *
394 p_fqnname(const u_char *cp, const u_char *msg, int msglen, char *name,
395 int namelen)
396 {
397 int n;
398 size_t newlen;
399
400 if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0)
401 return (NULL);
402 newlen = strlen(name);
403 if (newlen == 0 || name[newlen - 1] != '.') {
404 if ((int)newlen + 1 >= namelen) /*%< Lack space for final dot */
405 return (NULL);
406 else
407 strcpy(name + newlen, ".");
408 }
409 return (cp + n);
410 }
411
412 /* XXX: the rest of these functions need to become length-limited, too. */
413
414 const u_char *
415 p_fqname(const u_char *cp, const u_char *msg, FILE *file) {
416 char name[MAXDNAME];
417 const u_char *n;
418
419 n = p_fqnname(cp, msg, MAXCDNAME, name, (int)sizeof name);
420 if (n == NULL)
421 return (NULL);
422 fputs(name, file);
423 return (n);
424 }
425
426 /*%
427 * Names of RR classes and qclasses. Classes and qclasses are the same, except
428 * that C_ANY is a qclass but not a class. (You can ask for records of class
429 * C_ANY, but you can't have any records of that class in the database.)
430 */
431 const struct res_sym __p_class_syms[] = {
432 {C_IN, "IN", (char *)0},
433 {C_CHAOS, "CH", (char *)0},
434 {C_CHAOS, "CHAOS", (char *)0},
435 {C_HS, "HS", (char *)0},
436 {C_HS, "HESIOD", (char *)0},
437 {C_ANY, "ANY", (char *)0},
438 {C_NONE, "NONE", (char *)0},
439 {C_IN, (char *)0, (char *)0}
440 };
441
442 /*%
443 * Names of message sections.
444 */
445 const struct res_sym __p_default_section_syms[] = {
446 {ns_s_qd, "QUERY", (char *)0},
447 {ns_s_an, "ANSWER", (char *)0},
448 {ns_s_ns, "AUTHORITY", (char *)0},
449 {ns_s_ar, "ADDITIONAL", (char *)0},
450 {0, (char *)0, (char *)0}
451 };
452
453 const struct res_sym __p_update_section_syms[] = {
454 {S_ZONE, "ZONE", (char *)0},
455 {S_PREREQ, "PREREQUISITE", (char *)0},
456 {S_UPDATE, "UPDATE", (char *)0},
457 {S_ADDT, "ADDITIONAL", (char *)0},
458 {0, (char *)0, (char *)0}
459 };
460
461 const struct res_sym __p_key_syms[] = {
462 {NS_ALG_MD5RSA, "RSA", "RSA KEY with MD5 hash"},
463 {NS_ALG_DH, "DH", "Diffie Hellman"},
464 {NS_ALG_DSA, "DSA", "Digital Signature Algorithm"},
465 {NS_ALG_EXPIRE_ONLY, "EXPIREONLY", "No algorithm"},
466 {NS_ALG_PRIVATE_OID, "PRIVATE", "Algorithm obtained from OID"},
467 {0, NULL, NULL}
468 };
469
470 const struct res_sym __p_cert_syms[] = {
471 {cert_t_pkix, "PKIX", "PKIX (X.509v3) Certificate"},
472 {cert_t_spki, "SPKI", "SPKI certificate"},
473 {cert_t_pgp, "PGP", "PGP certificate"},
474 {cert_t_url, "URL", "URL Private"},
475 {cert_t_oid, "OID", "OID Private"},
476 {0, NULL, NULL}
477 };
478
479 /*%
480 * Names of RR types and qtypes. Types and qtypes are the same, except
481 * that T_ANY is a qtype but not a type. (You can ask for records of type
482 * T_ANY, but you can't have any records of that type in the database.)
483 */
484 const struct res_sym __p_type_syms[] = {
485 {ns_t_a, "A", "address"},
486 {ns_t_ns, "NS", "name server"},
487 {ns_t_md, "MD", "mail destination (deprecated)"},
488 {ns_t_mf, "MF", "mail forwarder (deprecated)"},
489 {ns_t_cname, "CNAME", "canonical name"},
490 {ns_t_soa, "SOA", "start of authority"},
491 {ns_t_mb, "MB", "mailbox"},
492 {ns_t_mg, "MG", "mail group member"},
493 {ns_t_mr, "MR", "mail rename"},
494 {ns_t_null, "NULL", "null"},
495 {ns_t_wks, "WKS", "well-known service (deprecated)"},
496 {ns_t_ptr, "PTR", "domain name pointer"},
497 {ns_t_hinfo, "HINFO", "host information"},
498 {ns_t_minfo, "MINFO", "mailbox information"},
499 {ns_t_mx, "MX", "mail exchanger"},
500 {ns_t_txt, "TXT", "text"},
501 {ns_t_rp, "RP", "responsible person"},
502 {ns_t_afsdb, "AFSDB", "DCE or AFS server"},
503 {ns_t_x25, "X25", "X25 address"},
504 {ns_t_isdn, "ISDN", "ISDN address"},
505 {ns_t_rt, "RT", "router"},
506 {ns_t_nsap, "NSAP", "nsap address"},
507 {ns_t_nsap_ptr, "NSAP_PTR", "domain name pointer"},
508 {ns_t_sig, "SIG", "signature"},
509 {ns_t_key, "KEY", "key"},
510 {ns_t_px, "PX", "mapping information"},
511 {ns_t_gpos, "GPOS", "geographical position (withdrawn)"},
512 {ns_t_aaaa, "AAAA", "IPv6 address"},
513 {ns_t_loc, "LOC", "location"},
514 {ns_t_nxt, "NXT", "next valid name (unimplemented)"},
515 {ns_t_eid, "EID", "endpoint identifier (unimplemented)"},
516 {ns_t_nimloc, "NIMLOC", "NIMROD locator (unimplemented)"},
517 {ns_t_srv, "SRV", "server selection"},
518 {ns_t_atma, "ATMA", "ATM address (unimplemented)"},
519 {ns_t_naptr, "NAPTR", "naptr"},
520 {ns_t_kx, "KX", "key exchange"},
521 {ns_t_cert, "CERT", "certificate"},
522 {ns_t_a6, "A", "IPv6 address (experminental)"},
523 {ns_t_dname, "DNAME", "non-terminal redirection"},
524 {ns_t_opt, "OPT", "opt"},
525 {ns_t_apl, "apl", "apl"},
526 {ns_t_ds, "DS", "delegation signer"},
527 {ns_t_sshfp, "SSFP", "SSH fingerprint"},
528 {ns_t_ipseckey, "IPSECKEY", "IPSEC key"},
529 {ns_t_rrsig, "RRSIG", "rrsig"},
530 {ns_t_nsec, "NSEC", "nsec"},
531 {ns_t_dnskey, "DNSKEY", "DNS key"},
532 {ns_t_dhcid, "DHCID", "dynamic host configuration identifier"},
533 {ns_t_nsec3, "NSEC3", "nsec3"},
534 {ns_t_nsec3param, "NSEC3PARAM", "NSEC3 parameters"},
535 {ns_t_hip, "HIP", "host identity protocol"},
536 {ns_t_spf, "SPF", "sender policy framework"},
537 {ns_t_tkey, "TKEY", "tkey"},
538 {ns_t_tsig, "TSIG", "transaction signature"},
539 {ns_t_ixfr, "IXFR", "incremental zone transfer"},
540 {ns_t_axfr, "AXFR", "zone transfer"},
541 {ns_t_zxfr, "ZXFR", "compressed zone transfer"},
542 {ns_t_mailb, "MAILB", "mailbox-related data (deprecated)"},
543 {ns_t_maila, "MAILA", "mail agent (deprecated)"},
544 {ns_t_naptr, "NAPTR", "URN Naming Authority"},
545 {ns_t_kx, "KX", "Key Exchange"},
546 {ns_t_cert, "CERT", "Certificate"},
547 {ns_t_a6, "A6", "IPv6 Address"},
548 {ns_t_dname, "DNAME", "dname"},
549 {ns_t_sink, "SINK", "Kitchen Sink (experimental)"},
550 {ns_t_opt, "OPT", "EDNS Options"},
551 {ns_t_any, "ANY", "\"any\""},
552 {ns_t_dlv, "DLV", "DNSSEC look-aside validation"},
553 {0, NULL, NULL}
554 };
555
556 /*%
557 * Names of DNS rcodes.
558 */
559 const struct res_sym __p_rcode_syms[] = {
560 {ns_r_noerror, "NOERROR", "no error"},
561 {ns_r_formerr, "FORMERR", "format error"},
562 {ns_r_servfail, "SERVFAIL", "server failed"},
563 {ns_r_nxdomain, "NXDOMAIN", "no such domain name"},
564 {ns_r_notimpl, "NOTIMP", "not implemented"},
565 {ns_r_refused, "REFUSED", "refused"},
566 {ns_r_yxdomain, "YXDOMAIN", "domain name exists"},
567 {ns_r_yxrrset, "YXRRSET", "rrset exists"},
568 {ns_r_nxrrset, "NXRRSET", "rrset doesn't exist"},
569 {ns_r_notauth, "NOTAUTH", "not authoritative"},
570 {ns_r_notzone, "NOTZONE", "Not in zone"},
571 {ns_r_max, "", ""},
572 {ns_r_badsig, "BADSIG", "bad signature"},
573 {ns_r_badkey, "BADKEY", "bad key"},
574 {ns_r_badtime, "BADTIME", "bad time"},
575 {0, NULL, NULL}
576 };
577
578 int
579 sym_ston(const struct res_sym *syms, const char *name, int *success) {
580 for (; syms->name != 0; syms++) {
581 if (strcasecmp (name, syms->name) == 0) {
582 if (success)
583 *success = 1;
584 return (syms->number);
585 }
586 }
587 if (success)
588 *success = 0;
589 return (syms->number); /*%< The default value. */
590 }
591
592 const char *
593 sym_ntos(const struct res_sym *syms, int number, int *success) {
594 char *unname = sym_ntos_unname;
595
596 for (; syms->name != 0; syms++) {
597 if (number == syms->number) {
598 if (success)
599 *success = 1;
600 return (syms->name);
601 }
602 }
603
604 sprintf(unname, "%d", number); /*%< XXX nonreentrant */
605 if (success)
606 *success = 0;
607 return (unname);
608 }
609
610 const char *
611 sym_ntop(const struct res_sym *syms, int number, int *success) {
612 char *unname = sym_ntop_unname;
613
614 for (; syms->name != 0; syms++) {
615 if (number == syms->number) {
616 if (success)
617 *success = 1;
618 return (syms->humanname);
619 }
620 }
621 sprintf(unname, "%d", number); /*%< XXX nonreentrant */
622 if (success)
623 *success = 0;
624 return (unname);
625 }
626
627 /*%
628 * Return a string for the type.
629 */
630 const char *
631 p_type(int type) {
632 int success;
633 const char *result;
634 static char typebuf[20];
635
636 result = sym_ntos(__p_type_syms, type, &success);
637 if (success)
638 return (result);
639 if (type < 0 || type > 0xffff)
640 return ("BADTYPE");
641 sprintf(typebuf, "TYPE%d", type);
642 return (typebuf);
643 }
644
645 /*%
646 * Return a string for the type.
647 */
648 const char *
649 p_section(int section, int opcode) {
650 const struct res_sym *symbols;
651
652 switch (opcode) {
653 case ns_o_update:
654 symbols = __p_update_section_syms;
655 break;
656 default:
657 symbols = __p_default_section_syms;
658 break;
659 }
660 return (sym_ntos(symbols, section, (int *)0));
661 }
662
663 /*%
664 * Return a mnemonic for class.
665 */
666 const char *
667 p_class(int class) {
668 int success;
669 const char *result;
670 static char classbuf[20];
671
672 result = sym_ntos(__p_class_syms, class, &success);
673 if (success)
674 return (result);
675 if (class < 0 || class > 0xffff)
676 return ("BADCLASS");
677 sprintf(classbuf, "CLASS%d", class);
678 return (classbuf);
679 }
680
681 /*%
682 * Return a mnemonic for an option
683 */
684 const char *
685 p_option(u_long option) {
686 char *nbuf = p_option_nbuf;
687
688 switch (option) {
689 case RES_INIT: return "init";
690 case RES_DEBUG: return "debug";
691 case RES_AAONLY: return "aaonly(unimpl)";
692 case RES_USEVC: return "usevc";
693 case RES_PRIMARY: return "primry(unimpl)";
694 case RES_IGNTC: return "igntc";
695 case RES_RECURSE: return "recurs";
696 case RES_DEFNAMES: return "defnam";
697 case RES_STAYOPEN: return "styopn";
698 case RES_DNSRCH: return "dnsrch";
699 case RES_INSECURE1: return "insecure1";
700 case RES_INSECURE2: return "insecure2";
701 case RES_NOALIASES: return "noaliases";
702 case RES_USE_INET6: return "inet6";
703 #ifdef RES_USE_EDNS0 /*%< KAME extension */
704 case RES_USE_EDNS0: return "edns0";
705 case RES_NSID: return "nsid";
706 #endif
707 #ifdef RES_USE_DNAME
708 case RES_USE_DNAME: return "dname";
709 #endif
710 #ifdef RES_USE_DNSSEC
711 case RES_USE_DNSSEC: return "dnssec";
712 #endif
713 #ifdef RES_NOTLDQUERY
714 case RES_NOTLDQUERY: return "no-tld-query";
715 #endif
716 #ifdef RES_NO_NIBBLE2
717 case RES_NO_NIBBLE2: return "no-nibble2";
718 #endif
719 /* XXX nonreentrant */
720 default: sprintf(nbuf, "?0x%lx?", (u_long)option);
721 return (nbuf);
722 }
723 }
724
725 /*%
726 * Return a mnemonic for a time to live.
727 */
728 const char *
729 p_time(u_int32_t value) {
730 char *nbuf = p_time_nbuf;
731
732 if (ns_format_ttl((u_long)value, nbuf, sizeof nbuf) < 0)
733 sprintf(nbuf, "%u", value);
734 return (nbuf);
735 }
736
737 /*%
738 * Return a string for the rcode.
739 */
740 const char *
741 p_rcode(int rcode) {
742 return (sym_ntos(__p_rcode_syms, rcode, (int *)0));
743 }
744
745 /*%
746 * Return a string for a res_sockaddr_union.
747 */
748 const char *
749 p_sockun(union res_sockaddr_union u, char *buf, size_t size) {
750 char ret[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:123.123.123.123"];
751
752 switch (u.sin.sin_family) {
753 case AF_INET:
754 inet_ntop(AF_INET, &u.sin.sin_addr, ret, (socklen_t)sizeof ret);
755 break;
756 #ifdef HAS_INET6_STRUCTS
757 case AF_INET6:
758 inet_ntop(AF_INET6, &u.sin6.sin6_addr, ret, sizeof ret);
759 break;
760 #endif
761 default:
762 sprintf(ret, "[af%d]", u.sin.sin_family);
763 break;
764 }
765 if (size > 0U) {
766 strncpy(buf, ret, size - 1);
767 buf[size - 1] = '0';
768 }
769 return (buf);
770 }
771
772 /*%
773 * routines to convert between on-the-wire RR format and zone file format.
774 * Does not contain conversion to/from decimal degrees; divide or multiply
775 * by 60*60*1000 for that.
776 */
777
778 static unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000,
779 1000000,10000000,100000000,1000000000};
780
781 /*% takes an XeY precision/size value, returns a string representation. */
782 static const char *
783 precsize_ntoa(u_int32_t prec)
784 {
785 char *retbuf = precsize_ntoa_retbuf;
786 unsigned long val;
787 int mantissa, exponent;
788
789 mantissa = (int)((prec >> 4) & 0x0f) % 10;
790 exponent = (int)((prec >> 0) & 0x0f) % 10;
791
792 val = mantissa * poweroften[exponent];
793
794 (void) sprintf(retbuf, "%lu.%.2lu", val/100, val%100);
795 return (retbuf);
796 }
797
798 /*% converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */
799 static u_int8_t
800 precsize_aton(const char **strptr) {
801 unsigned int mval = 0, cmval = 0;
802 u_int8_t retval = 0;
803 const char *cp;
804 int exponent;
805 int mantissa;
806
807 cp = *strptr;
808
809 while (isdigit((unsigned char)*cp))
810 mval = mval * 10 + (*cp++ - '0');
811
812 if (*cp == '.') { /*%< centimeters */
813 cp++;
814 if (isdigit((unsigned char)*cp)) {
815 cmval = (*cp++ - '0') * 10;
816 if (isdigit((unsigned char)*cp)) {
817 cmval += (*cp++ - '0');
818 }
819 }
820 }
821 cmval = (mval * 100) + cmval;
822
823 for (exponent = 0; exponent < 9; exponent++)
824 if (cmval < poweroften[exponent+1])
825 break;
826
827 mantissa = cmval / poweroften[exponent];
828 if (mantissa > 9)
829 mantissa = 9;
830
831 retval = (mantissa << 4) | exponent;
832
833 *strptr = cp;
834
835 return (retval);
836 }
837
838 /*% converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */
839 static u_int32_t
840 latlon2ul(const char **latlonstrptr, int *which) {
841 const char *cp;
842 u_int32_t retval;
843 int deg = 0, min = 0, secs = 0, secsfrac = 0;
844
845 cp = *latlonstrptr;
846
847 while (isdigit((unsigned char)*cp))
848 deg = deg * 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 min = min * 10 + (*cp++ - '0');
858
859 while (isspace((unsigned char)*cp))
860 cp++;
861
862 if (!(isdigit((unsigned char)*cp)))
863 goto fndhemi;
864
865 while (isdigit((unsigned char)*cp))
866 secs = secs * 10 + (*cp++ - '0');
867
868 if (*cp == '.') { /*%< decimal seconds */
869 cp++;
870 if (isdigit((unsigned char)*cp)) {
871 secsfrac = (*cp++ - '0') * 100;
872 if (isdigit((unsigned char)*cp)) {
873 secsfrac += (*cp++ - '0') * 10;
874 if (isdigit((unsigned char)*cp)) {
875 secsfrac += (*cp++ - '0');
876 }
877 }
878 }
879 }
880
881 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */
882 cp++;
883
884 while (isspace((unsigned char)*cp))
885 cp++;
886
887 fndhemi:
888 switch (*cp) {
889 case 'N': case 'n':
890 case 'E': case 'e':
891 retval = ((unsigned)1<<31)
892 + (((((deg * 60) + min) * 60) + secs) * 1000)
893 + secsfrac;
894 break;
895 case 'S': case 's':
896 case 'W': case 'w':
897 retval = ((unsigned)1<<31)
898 - (((((deg * 60) + min) * 60) + secs) * 1000)
899 - secsfrac;
900 break;
901 default:
902 retval = 0; /*%< invalid value -- indicates error */
903 break;
904 }
905
906 switch (*cp) {
907 case 'N': case 'n':
908 case 'S': case 's':
909 *which = 1; /*%< latitude */
910 break;
911 case 'E': case 'e':
912 case 'W': case 'w':
913 *which = 2; /*%< longitude */
914 break;
915 default:
916 *which = 0; /*%< error */
917 break;
918 }
919
920 cp++; /*%< skip the hemisphere */
921 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */
922 cp++;
923
924 while (isspace((unsigned char)*cp)) /*%< move to next field */
925 cp++;
926
927 *latlonstrptr = cp;
928
929 return (retval);
930 }
931
932 /*%
933 * converts a zone file representation in a string to an RDATA on-the-wire
934 * representation. */
935 int
936 loc_aton(const char *ascii, u_char *binary)
937 {
938 const char *cp, *maxcp;
939 u_char *bcp;
940
941 u_int32_t latit = 0, longit = 0, alt = 0;
942 u_int32_t lltemp1 = 0, lltemp2 = 0;
943 int altmeters = 0, altfrac = 0, altsign = 1;
944 u_int8_t hp = 0x16; /*%< default = 1e6 cm = 10000.00m = 10km */
945 u_int8_t vp = 0x13; /*%< default = 1e3 cm = 10.00m */
946 u_int8_t siz = 0x12; /*%< default = 1e2 cm = 1.00m */
947 int which1 = 0, which2 = 0;
948
949 cp = ascii;
950 maxcp = cp + strlen(ascii);
951
952 lltemp1 = latlon2ul(&cp, &which1);
953
954 lltemp2 = latlon2ul(&cp, &which2);
955
956 switch (which1 + which2) {
957 case 3: /*%< 1 + 2, the only valid combination */
958 if ((which1 == 1) && (which2 == 2)) { /*%< normal case */
959 latit = lltemp1;
960 longit = lltemp2;
961 } else if ((which1 == 2) && (which2 == 1)) { /*%< reversed */
962 longit = lltemp1;
963 latit = lltemp2;
964 } else { /*%< some kind of brokenness */
965 return (0);
966 }
967 break;
968 default: /*%< we didn't get one of each */
969 return (0);
970 }
971
972 /* altitude */
973 if (*cp == '-') {
974 altsign = -1;
975 cp++;
976 }
977
978 if (*cp == '+')
979 cp++;
980
981 while (isdigit((unsigned char)*cp))
982 altmeters = altmeters * 10 + (*cp++ - '0');
983
984 if (*cp == '.') { /*%< decimal meters */
985 cp++;
986 if (isdigit((unsigned char)*cp)) {
987 altfrac = (*cp++ - '0') * 10;
988 if (isdigit((unsigned char)*cp)) {
989 altfrac += (*cp++ - '0');
990 }
991 }
992 }
993
994 alt = (10000000 + (altsign * (altmeters * 100 + altfrac)));
995
996 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */
997 cp++;
998
999 while (isspace((unsigned char)*cp) && (cp < maxcp))
1000 cp++;
1001
1002 if (cp >= maxcp)
1003 goto defaults;
1004
1005 siz = precsize_aton(&cp);
1006
1007 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */
1008 cp++;
1009
1010 while (isspace((unsigned char)*cp) && (cp < maxcp))
1011 cp++;
1012
1013 if (cp >= maxcp)
1014 goto defaults;
1015
1016 hp = precsize_aton(&cp);
1017
1018 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */
1019 cp++;
1020
1021 while (isspace((unsigned char)*cp) && (cp < maxcp))
1022 cp++;
1023
1024 if (cp >= maxcp)
1025 goto defaults;
1026
1027 vp = precsize_aton(&cp);
1028
1029 defaults:
1030
1031 bcp = binary;
1032 *bcp++ = (u_int8_t) 0; /*%< version byte */
1033 *bcp++ = siz;
1034 *bcp++ = hp;
1035 *bcp++ = vp;
1036 PUTLONG(latit,bcp);
1037 PUTLONG(longit,bcp);
1038 PUTLONG(alt,bcp);
1039
1040 return (16); /*%< size of RR in octets */
1041 }
1042
1043 /*% takes an on-the-wire LOC RR and formats it in a human readable format. */
1044 const char *
1045 loc_ntoa(const u_char *binary, char *ascii)
1046 {
1047 static const char *error = "?";
1048 static char tmpbuf[sizeof
1049 "1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"];
1050 const u_char *cp = binary;
1051
1052 int latdeg, latmin, latsec, latsecfrac;
1053 int longdeg, longmin, longsec, longsecfrac;
1054 char northsouth, eastwest;
1055 const char *altsign;
1056 int altmeters, altfrac;
1057
1058 const u_int32_t referencealt = 100000 * 100;
1059
1060 int32_t latval, longval, altval;
1061 u_int32_t templ;
1062 u_int8_t sizeval, hpval, vpval, versionval;
1063
1064 char *sizestr, *hpstr, *vpstr;
1065
1066 versionval = *cp++;
1067
1068 if (ascii == NULL)
1069 ascii = tmpbuf;
1070
1071 if (versionval) {
1072 (void) sprintf(ascii, "; error: unknown LOC RR version");
1073 return (ascii);
1074 }
1075
1076 sizeval = *cp++;
1077
1078 hpval = *cp++;
1079 vpval = *cp++;
1080
1081 GETLONG(templ, cp);
1082 latval = (templ - ((unsigned)1<<31));
1083
1084 GETLONG(templ, cp);
1085 longval = (templ - ((unsigned)1<<31));
1086
1087 GETLONG(templ, cp);
1088 if (templ < referencealt) { /*%< below WGS 84 spheroid */
1089 altval = referencealt - templ;
1090 altsign = "-";
1091 } else {
1092 altval = templ - referencealt;
1093 altsign = "";
1094 }
1095
1096 if (latval < 0) {
1097 northsouth = 'S';
1098 latval = -latval;
1099 } else
1100 northsouth = 'N';
1101
1102 latsecfrac = latval % 1000;
1103 latval = latval / 1000;
1104 latsec = latval % 60;
1105 latval = latval / 60;
1106 latmin = latval % 60;
1107 latval = latval / 60;
1108 latdeg = latval;
1109
1110 if (longval < 0) {
1111 eastwest = 'W';
1112 longval = -longval;
1113 } else
1114 eastwest = 'E';
1115
1116 longsecfrac = longval % 1000;
1117 longval = longval / 1000;
1118 longsec = longval % 60;
1119 longval = longval / 60;
1120 longmin = longval % 60;
1121 longval = longval / 60;
1122 longdeg = longval;
1123
1124 altfrac = altval % 100;
1125 altmeters = (altval / 100);
1126
1127 sizestr = strdup(precsize_ntoa((u_int32_t)sizeval));
1128 hpstr = strdup(precsize_ntoa((u_int32_t)hpval));
1129 vpstr = strdup(precsize_ntoa((u_int32_t)vpval));
1130
1131 sprintf(ascii,
1132 "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm",
1133 latdeg, latmin, latsec, latsecfrac, northsouth,
1134 longdeg, longmin, longsec, longsecfrac, eastwest,
1135 altsign, altmeters, altfrac,
1136 (sizestr != NULL) ? sizestr : error,
1137 (hpstr != NULL) ? hpstr : error,
1138 (vpstr != NULL) ? vpstr : error);
1139
1140 if (sizestr != NULL)
1141 free(sizestr);
1142 if (hpstr != NULL)
1143 free(hpstr);
1144 if (vpstr != NULL)
1145 free(vpstr);
1146
1147 return (ascii);
1148 }
1149
1150
1151 /*% Return the number of DNS hierarchy levels in the name. */
1152 int
1153 dn_count_labels(const char *name) {
1154 size_t len, i, count;
1155
1156 len = strlen(name);
1157 for (i = 0, count = 0; i < len; i++) {
1158 /* XXX need to check for \. or use named's nlabels(). */
1159 if (name[i] == '.')
1160 count++;
1161 }
1162
1163 /* don't count initial wildcard */
1164 if (name[0] == '*')
1165 if (count)
1166 count--;
1167
1168 /* don't count the null label for root. */
1169 /* if terminating '.' not found, must adjust */
1170 /* count to include last label */
1171 if (len > 0 && name[len-1] != '.')
1172 count++;
1173 _DIAGASSERT(__type_fit(int, count));
1174 return (int)count;
1175 }
1176
1177 /*%
1178 * Make dates expressed in seconds-since-Jan-1-1970 easy to read.
1179 * SIG records are required to be printed like this, by the Secure DNS RFC.
1180 */
1181 char *
1182 p_secstodate (u_long secs) {
1183 /* XXX nonreentrant */
1184 char *output = p_secstodate_output;
1185 time_t myclock = secs;
1186 struct tm *mytime;
1187 #ifdef HAVE_TIME_R
1188 struct tm res;
1189
1190 mytime = gmtime_r(&myclock, &res);
1191 #else
1192 mytime = gmtime(&myclock);
1193 #endif
1194 mytime->tm_year += 1900;
1195 mytime->tm_mon += 1;
1196 sprintf(output, "%04d%02d%02d%02d%02d%02d",
1197 mytime->tm_year, mytime->tm_mon, mytime->tm_mday,
1198 mytime->tm_hour, mytime->tm_min, mytime->tm_sec);
1199 return (output);
1200 }
1201
1202 u_int16_t
1203 res_nametoclass(const char *buf, int *successp) {
1204 unsigned long result;
1205 char *endptr;
1206 int success;
1207
1208 result = sym_ston(__p_class_syms, buf, &success);
1209 if (success)
1210 goto done;
1211
1212 if (strncasecmp(buf, "CLASS", 5) != 0 ||
1213 !isdigit((unsigned char)buf[5]))
1214 goto done;
1215 errno = 0;
1216 result = strtoul(buf + 5, &endptr, 10);
1217 if (errno == 0 && *endptr == '\0' && result <= 0xffffU)
1218 success = 1;
1219 done:
1220 if (successp)
1221 *successp = success;
1222 return (u_int16_t)(result);
1223 }
1224
1225 u_int16_t
1226 res_nametotype(const char *buf, int *successp) {
1227 unsigned long result;
1228 char *endptr;
1229 int success;
1230
1231 result = sym_ston(__p_type_syms, buf, &success);
1232 if (success)
1233 goto done;
1234
1235 if (strncasecmp(buf, "type", 4) != 0 ||
1236 !isdigit((unsigned char)buf[4]))
1237 goto done;
1238 errno = 0;
1239 result = strtoul(buf + 4, &endptr, 10);
1240 if (errno == 0 && *endptr == '\0' && result <= 0xffffU)
1241 success = 1;
1242 done:
1243 if (successp)
1244 *successp = success;
1245 return (u_int16_t)(result);
1246 }
1247
1248 /*! \file */
MINIX 3 (repo.or.cz mirror)