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BIND: update vendor tree to 9.5.2-P2
[dragonfly.git] / contrib / bind / lib / bind / resolv / res_debug.c
blobabe5726e8cd581ffe286614b2dfd1294df7b4ca1
1 /*
2 * Copyright (c) 1985
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 /*
35 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
36 *
37 * Permission to use, copy, modify, and distribute this software for any
38 * purpose with or without fee is hereby granted, provided that the above
39 * copyright notice and this permission notice appear in all copies, and that
40 * the name of Digital Equipment Corporation not be used in advertising or
41 * publicity pertaining to distribution of the document or software without
42 * specific, written prior permission.
43 *
44 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
45 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
46 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
47 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
48 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
49 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
50 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
51 * SOFTWARE.
52 */
53
54 /*
55 * Portions Copyright (c) 1995 by International Business Machines, Inc.
56 *
57 * International Business Machines, Inc. (hereinafter called IBM) grants
58 * permission under its copyrights to use, copy, modify, and distribute this
59 * Software with or without fee, provided that the above copyright notice and
60 * all paragraphs of this notice appear in all copies, and that the name of IBM
61 * not be used in connection with the marketing of any product incorporating
62 * the Software or modifications thereof, without specific, written prior
63 * permission.
64 *
65 * To the extent it has a right to do so, IBM grants an immunity from suit
66 * under its patents, if any, for the use, sale or manufacture of products to
67 * the extent that such products are used for performing Domain Name System
68 * dynamic updates in TCP/IP networks by means of the Software. No immunity is
69 * granted for any product per se or for any other function of any product.
70 *
71 * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES,
72 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
73 * PARTICULAR PURPOSE. IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL,
74 * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING
75 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN
76 * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES.
77 */
78
79 /*
80 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
81 * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
82 *
83 * Permission to use, copy, modify, and distribute this software for any
84 * purpose with or without fee is hereby granted, provided that the above
85 * copyright notice and this permission notice appear in all copies.
86 *
87 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
88 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
89 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
90 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
91 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
92 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
93 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
94 */
95
96 #if defined(LIBC_SCCS) && !defined(lint)
97 static const char sccsid[] = "@(#)res_debug.c 8.1 (Berkeley) 6/4/93";
98 static const char rcsid[] = "$Id: res_debug.c,v 1.15.574.1 2008/04/03 02:12:21 marka Exp $";
99 #endif /* LIBC_SCCS and not lint */
100
101 #include "port_before.h"
102
103 #include <sys/types.h>
104 #include <sys/param.h>
105 #include <sys/socket.h>
106
107 #include <netinet/in.h>
108 #include <arpa/inet.h>
109 #include <arpa/nameser.h>
110
111 #include <ctype.h>
112 #include <errno.h>
113 #include <math.h>
114 #include <netdb.h>
115 #include <resolv.h>
116 #include "resolv_mt.h"
117 #include <stdio.h>
118 #include <stdlib.h>
119 #include <string.h>
120 #include <time.h>
121
122 #include "port_after.h"
123
124 #ifdef SPRINTF_CHAR
125 # define SPRINTF(x) strlen(sprintf/**/x)
126 #else
127 # define SPRINTF(x) sprintf x
128 #endif
129
130 extern const char *_res_opcodes[];
131 extern const char *_res_sectioncodes[];
132
133 /*%
134 * Print the current options.
135 */
136 void
137 fp_resstat(const res_state statp, FILE *file) {
138 u_long mask;
139
140 fprintf(file, ";; res options:");
141 for (mask = 1; mask != 0U; mask <<= 1)
142 if (statp->options & mask)
143 fprintf(file, " %s", p_option(mask));
144 putc('\n', file);
145 }
146
147 static void
148 do_section(const res_state statp,
149 ns_msg *handle, ns_sect section,
150 int pflag, FILE *file)
151 {
152 int n, sflag, rrnum;
153 static int buflen = 2048;
154 char *buf;
155 ns_opcode opcode;
156 ns_rr rr;
157
158 /*
159 * Print answer records.
160 */
161 sflag = (statp->pfcode & pflag);
162 if (statp->pfcode && !sflag)
163 return;
164
165 buf = malloc(buflen);
166 if (buf == NULL) {
167 fprintf(file, ";; memory allocation failure\n");
168 return;
169 }
170
171 opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode);
172 rrnum = 0;
173 for (;;) {
174 if (ns_parserr(handle, section, rrnum, &rr)) {
175 if (errno != ENODEV)
176 fprintf(file, ";; ns_parserr: %s\n",
177 strerror(errno));
178 else if (rrnum > 0 && sflag != 0 &&
179 (statp->pfcode & RES_PRF_HEAD1))
180 putc('\n', file);
181 goto cleanup;
182 }
183 if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1))
184 fprintf(file, ";; %s SECTION:\n",
185 p_section(section, opcode));
186 if (section == ns_s_qd)
187 fprintf(file, ";;\t%s, type = %s, class = %s\n",
188 ns_rr_name(rr),
189 p_type(ns_rr_type(rr)),
190 p_class(ns_rr_class(rr)));
191 else if (section == ns_s_ar && ns_rr_type(rr) == ns_t_opt) {
192 u_int16_t optcode, optlen, rdatalen = ns_rr_rdlen(rr);
193 u_int32_t ttl = ns_rr_ttl(rr);
194
195 fprintf(file,
196 "; EDNS: version: %u, udp=%u, flags=%04x\n",
197 (ttl>>16)&0xff, ns_rr_class(rr), ttl&0xffff);
198
199 while (rdatalen >= 4) {
200 const u_char *cp = ns_rr_rdata(rr);
201 int i;
202
203 GETSHORT(optcode, cp);
204 GETSHORT(optlen, cp);
205
206 if (optcode == NS_OPT_NSID) {
207 fputs("; NSID: ", file);
208 if (optlen == 0) {
209 fputs("; NSID\n", file);
210 } else {
211 fputs("; NSID: ", file);
212 for (i = 0; i < optlen; i++)
213 fprintf(file, "%02x ",
214 cp[i]);
215 fputs(" (",file);
216 for (i = 0; i < optlen; i++)
217 fprintf(file, "%c",
218 isprint(cp[i])?
219 cp[i] : '.');
220 fputs(")\n", file);
221 }
222 } else {
223 if (optlen == 0) {
224 fprintf(file, "; OPT=%u\n",
225 optcode);
226 } else {
227 fprintf(file, "; OPT=%u: ",
228 optcode);
229 for (i = 0; i < optlen; i++)
230 fprintf(file, "%02x ",
231 cp[i]);
232 fputs(" (",file);
233 for (i = 0; i < optlen; i++)
234 fprintf(file, "%c",
235 isprint(cp[i]) ?
236 cp[i] : '.');
237 fputs(")\n", file);
238 }
239 }
240 rdatalen -= 4 + optlen;
241 }
242 } else {
243 n = ns_sprintrr(handle, &rr, NULL, NULL,
244 buf, buflen);
245 if (n < 0) {
246 if (errno == ENOSPC) {
247 free(buf);
248 buf = NULL;
249 if (buflen < 131072)
250 buf = malloc(buflen += 1024);
251 if (buf == NULL) {
252 fprintf(file,
253 ";; memory allocation failure\n");
254 return;
255 }
256 continue;
257 }
258 fprintf(file, ";; ns_sprintrr: %s\n",
259 strerror(errno));
260 goto cleanup;
261 }
262 fputs(buf, file);
263 fputc('\n', file);
264 }
265 rrnum++;
266 }
267 cleanup:
268 if (buf != NULL)
269 free(buf);
270 }
271
272 /*%
273 * Print the contents of a query.
274 * This is intended to be primarily a debugging routine.
275 */
276 void
277 res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) {
278 ns_msg handle;
279 int qdcount, ancount, nscount, arcount;
280 u_int opcode, rcode, id;
281
282 if (ns_initparse(msg, len, &handle) < 0) {
283 fprintf(file, ";; ns_initparse: %s\n", strerror(errno));
284 return;
285 }
286 opcode = ns_msg_getflag(handle, ns_f_opcode);
287 rcode = ns_msg_getflag(handle, ns_f_rcode);
288 id = ns_msg_id(handle);
289 qdcount = ns_msg_count(handle, ns_s_qd);
290 ancount = ns_msg_count(handle, ns_s_an);
291 nscount = ns_msg_count(handle, ns_s_ns);
292 arcount = ns_msg_count(handle, ns_s_ar);
293
294 /*
295 * Print header fields.
296 */
297 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode)
298 fprintf(file,
299 ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n",
300 _res_opcodes[opcode], p_rcode(rcode), id);
301 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX))
302 putc(';', file);
303 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) {
304 fprintf(file, "; flags:");
305 if (ns_msg_getflag(handle, ns_f_qr))
306 fprintf(file, " qr");
307 if (ns_msg_getflag(handle, ns_f_aa))
308 fprintf(file, " aa");
309 if (ns_msg_getflag(handle, ns_f_tc))
310 fprintf(file, " tc");
311 if (ns_msg_getflag(handle, ns_f_rd))
312 fprintf(file, " rd");
313 if (ns_msg_getflag(handle, ns_f_ra))
314 fprintf(file, " ra");
315 if (ns_msg_getflag(handle, ns_f_z))
316 fprintf(file, " ??");
317 if (ns_msg_getflag(handle, ns_f_ad))
318 fprintf(file, " ad");
319 if (ns_msg_getflag(handle, ns_f_cd))
320 fprintf(file, " cd");
321 }
322 if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) {
323 fprintf(file, "; %s: %d",
324 p_section(ns_s_qd, opcode), qdcount);
325 fprintf(file, ", %s: %d",
326 p_section(ns_s_an, opcode), ancount);
327 fprintf(file, ", %s: %d",
328 p_section(ns_s_ns, opcode), nscount);
329 fprintf(file, ", %s: %d",
330 p_section(ns_s_ar, opcode), arcount);
331 }
332 if ((!statp->pfcode) || (statp->pfcode &
333 (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) {
334 putc('\n',file);
335 }
336 /*
337 * Print the various sections.
338 */
339 do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file);
340 do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file);
341 do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file);
342 do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file);
343 if (qdcount == 0 && ancount == 0 &&
344 nscount == 0 && arcount == 0)
345 putc('\n', file);
346 }
347
348 const u_char *
349 p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) {
350 char name[MAXDNAME];
351 int n;
352
353 if ((n = dn_expand(msg, msg + len, cp, name, sizeof name)) < 0)
354 return (NULL);
355 if (name[0] == '\0')
356 putc('.', file);
357 else
358 fputs(name, file);
359 return (cp + n);
360 }
361
362 const u_char *
363 p_cdname(const u_char *cp, const u_char *msg, FILE *file) {
364 return (p_cdnname(cp, msg, PACKETSZ, file));
365 }
366
367 /*%
368 * Return a fully-qualified domain name from a compressed name (with
369 length supplied). */
370
371 const u_char *
372 p_fqnname(cp, msg, msglen, name, namelen)
373 const u_char *cp, *msg;
374 int msglen;
375 char *name;
376 int namelen;
377 {
378 int n, newlen;
379
380 if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0)
381 return (NULL);
382 newlen = strlen(name);
383 if (newlen == 0 || name[newlen - 1] != '.') {
384 if (newlen + 1 >= namelen) /*%< Lack space for final dot */
385 return (NULL);
386 else
387 strcpy(name + newlen, ".");
388 }
389 return (cp + n);
390 }
391
392 /* XXX: the rest of these functions need to become length-limited, too. */
393
394 const u_char *
395 p_fqname(const u_char *cp, const u_char *msg, FILE *file) {
396 char name[MAXDNAME];
397 const u_char *n;
398
399 n = p_fqnname(cp, msg, MAXCDNAME, name, sizeof name);
400 if (n == NULL)
401 return (NULL);
402 fputs(name, file);
403 return (n);
404 }
405
406 /*%
407 * Names of RR classes and qclasses. Classes and qclasses are the same, except
408 * that C_ANY is a qclass but not a class. (You can ask for records of class
409 * C_ANY, but you can't have any records of that class in the database.)
410 */
411 const struct res_sym __p_class_syms[] = {
412 {C_IN, "IN", (char *)0},
413 {C_CHAOS, "CH", (char *)0},
414 {C_CHAOS, "CHAOS", (char *)0},
415 {C_HS, "HS", (char *)0},
416 {C_HS, "HESIOD", (char *)0},
417 {C_ANY, "ANY", (char *)0},
418 {C_NONE, "NONE", (char *)0},
419 {C_IN, (char *)0, (char *)0}
420 };
421
422 /*%
423 * Names of message sections.
424 */
425 const struct res_sym __p_default_section_syms[] = {
426 {ns_s_qd, "QUERY", (char *)0},
427 {ns_s_an, "ANSWER", (char *)0},
428 {ns_s_ns, "AUTHORITY", (char *)0},
429 {ns_s_ar, "ADDITIONAL", (char *)0},
430 {0, (char *)0, (char *)0}
431 };
432
433 const struct res_sym __p_update_section_syms[] = {
434 {S_ZONE, "ZONE", (char *)0},
435 {S_PREREQ, "PREREQUISITE", (char *)0},
436 {S_UPDATE, "UPDATE", (char *)0},
437 {S_ADDT, "ADDITIONAL", (char *)0},
438 {0, (char *)0, (char *)0}
439 };
440
441 const struct res_sym __p_key_syms[] = {
442 {NS_ALG_MD5RSA, "RSA", "RSA KEY with MD5 hash"},
443 {NS_ALG_DH, "DH", "Diffie Hellman"},
444 {NS_ALG_DSA, "DSA", "Digital Signature Algorithm"},
445 {NS_ALG_EXPIRE_ONLY, "EXPIREONLY", "No algorithm"},
446 {NS_ALG_PRIVATE_OID, "PRIVATE", "Algorithm obtained from OID"},
447 {0, NULL, NULL}
448 };
449
450 const struct res_sym __p_cert_syms[] = {
451 {cert_t_pkix, "PKIX", "PKIX (X.509v3) Certificate"},
452 {cert_t_spki, "SPKI", "SPKI certificate"},
453 {cert_t_pgp, "PGP", "PGP certificate"},
454 {cert_t_url, "URL", "URL Private"},
455 {cert_t_oid, "OID", "OID Private"},
456 {0, NULL, NULL}
457 };
458
459 /*%
460 * Names of RR types and qtypes. Types and qtypes are the same, except
461 * that T_ANY is a qtype but not a type. (You can ask for records of type
462 * T_ANY, but you can't have any records of that type in the database.)
463 */
464 const struct res_sym __p_type_syms[] = {
465 {ns_t_a, "A", "address"},
466 {ns_t_ns, "NS", "name server"},
467 {ns_t_md, "MD", "mail destination (deprecated)"},
468 {ns_t_mf, "MF", "mail forwarder (deprecated)"},
469 {ns_t_cname, "CNAME", "canonical name"},
470 {ns_t_soa, "SOA", "start of authority"},
471 {ns_t_mb, "MB", "mailbox"},
472 {ns_t_mg, "MG", "mail group member"},
473 {ns_t_mr, "MR", "mail rename"},
474 {ns_t_null, "NULL", "null"},
475 {ns_t_wks, "WKS", "well-known service (deprecated)"},
476 {ns_t_ptr, "PTR", "domain name pointer"},
477 {ns_t_hinfo, "HINFO", "host information"},
478 {ns_t_minfo, "MINFO", "mailbox information"},
479 {ns_t_mx, "MX", "mail exchanger"},
480 {ns_t_txt, "TXT", "text"},
481 {ns_t_rp, "RP", "responsible person"},
482 {ns_t_afsdb, "AFSDB", "DCE or AFS server"},
483 {ns_t_x25, "X25", "X25 address"},
484 {ns_t_isdn, "ISDN", "ISDN address"},
485 {ns_t_rt, "RT", "router"},
486 {ns_t_nsap, "NSAP", "nsap address"},
487 {ns_t_nsap_ptr, "NSAP_PTR", "domain name pointer"},
488 {ns_t_sig, "SIG", "signature"},
489 {ns_t_key, "KEY", "key"},
490 {ns_t_px, "PX", "mapping information"},
491 {ns_t_gpos, "GPOS", "geographical position (withdrawn)"},
492 {ns_t_aaaa, "AAAA", "IPv6 address"},
493 {ns_t_loc, "LOC", "location"},
494 {ns_t_nxt, "NXT", "next valid name (unimplemented)"},
495 {ns_t_eid, "EID", "endpoint identifier (unimplemented)"},
496 {ns_t_nimloc, "NIMLOC", "NIMROD locator (unimplemented)"},
497 {ns_t_srv, "SRV", "server selection"},
498 {ns_t_atma, "ATMA", "ATM address (unimplemented)"},
499 {ns_t_tkey, "TKEY", "tkey"},
500 {ns_t_tsig, "TSIG", "transaction signature"},
501 {ns_t_ixfr, "IXFR", "incremental zone transfer"},
502 {ns_t_axfr, "AXFR", "zone transfer"},
503 {ns_t_zxfr, "ZXFR", "compressed zone transfer"},
504 {ns_t_mailb, "MAILB", "mailbox-related data (deprecated)"},
505 {ns_t_maila, "MAILA", "mail agent (deprecated)"},
506 {ns_t_naptr, "NAPTR", "URN Naming Authority"},
507 {ns_t_kx, "KX", "Key Exchange"},
508 {ns_t_cert, "CERT", "Certificate"},
509 {ns_t_a6, "A6", "IPv6 Address"},
510 {ns_t_dname, "DNAME", "dname"},
511 {ns_t_sink, "SINK", "Kitchen Sink (experimental)"},
512 {ns_t_opt, "OPT", "EDNS Options"},
513 {ns_t_any, "ANY", "\"any\""},
514 {0, NULL, NULL}
515 };
516
517 /*%
518 * Names of DNS rcodes.
519 */
520 const struct res_sym __p_rcode_syms[] = {
521 {ns_r_noerror, "NOERROR", "no error"},
522 {ns_r_formerr, "FORMERR", "format error"},
523 {ns_r_servfail, "SERVFAIL", "server failed"},
524 {ns_r_nxdomain, "NXDOMAIN", "no such domain name"},
525 {ns_r_notimpl, "NOTIMP", "not implemented"},
526 {ns_r_refused, "REFUSED", "refused"},
527 {ns_r_yxdomain, "YXDOMAIN", "domain name exists"},
528 {ns_r_yxrrset, "YXRRSET", "rrset exists"},
529 {ns_r_nxrrset, "NXRRSET", "rrset doesn't exist"},
530 {ns_r_notauth, "NOTAUTH", "not authoritative"},
531 {ns_r_notzone, "NOTZONE", "Not in zone"},
532 {ns_r_max, "", ""},
533 {ns_r_badsig, "BADSIG", "bad signature"},
534 {ns_r_badkey, "BADKEY", "bad key"},
535 {ns_r_badtime, "BADTIME", "bad time"},
536 {0, NULL, NULL}
537 };
538
539 int
540 sym_ston(const struct res_sym *syms, const char *name, int *success) {
541 for ((void)NULL; syms->name != 0; syms++) {
542 if (strcasecmp (name, syms->name) == 0) {
543 if (success)
544 *success = 1;
545 return (syms->number);
546 }
547 }
548 if (success)
549 *success = 0;
550 return (syms->number); /*%< The default value. */
551 }
552
553 const char *
554 sym_ntos(const struct res_sym *syms, int number, int *success) {
555 char *unname = sym_ntos_unname;
556
557 for ((void)NULL; syms->name != 0; syms++) {
558 if (number == syms->number) {
559 if (success)
560 *success = 1;
561 return (syms->name);
562 }
563 }
564
565 sprintf(unname, "%d", number); /*%< XXX nonreentrant */
566 if (success)
567 *success = 0;
568 return (unname);
569 }
570
571 const char *
572 sym_ntop(const struct res_sym *syms, int number, int *success) {
573 char *unname = sym_ntop_unname;
574
575 for ((void)NULL; syms->name != 0; syms++) {
576 if (number == syms->number) {
577 if (success)
578 *success = 1;
579 return (syms->humanname);
580 }
581 }
582 sprintf(unname, "%d", number); /*%< XXX nonreentrant */
583 if (success)
584 *success = 0;
585 return (unname);
586 }
587
588 /*%
589 * Return a string for the type.
590 */
591 const char *
592 p_type(int type) {
593 int success;
594 const char *result;
595 static char typebuf[20];
596
597 result = sym_ntos(__p_type_syms, type, &success);
598 if (success)
599 return (result);
600 if (type < 0 || type > 0xffff)
601 return ("BADTYPE");
602 sprintf(typebuf, "TYPE%d", type);
603 return (typebuf);
604 }
605
606 /*%
607 * Return a string for the type.
608 */
609 const char *
610 p_section(int section, int opcode) {
611 const struct res_sym *symbols;
612
613 switch (opcode) {
614 case ns_o_update:
615 symbols = __p_update_section_syms;
616 break;
617 default:
618 symbols = __p_default_section_syms;
619 break;
620 }
621 return (sym_ntos(symbols, section, (int *)0));
622 }
623
624 /*%
625 * Return a mnemonic for class.
626 */
627 const char *
628 p_class(int class) {
629 int success;
630 const char *result;
631 static char classbuf[20];
632
633 result = sym_ntos(__p_class_syms, class, &success);
634 if (success)
635 return (result);
636 if (class < 0 || class > 0xffff)
637 return ("BADCLASS");
638 sprintf(classbuf, "CLASS%d", class);
639 return (classbuf);
640 }
641
642 /*%
643 * Return a mnemonic for an option
644 */
645 const char *
646 p_option(u_long option) {
647 char *nbuf = p_option_nbuf;
648
649 switch (option) {
650 case RES_INIT: return "init";
651 case RES_DEBUG: return "debug";
652 case RES_AAONLY: return "aaonly(unimpl)";
653 case RES_USEVC: return "usevc";
654 case RES_PRIMARY: return "primry(unimpl)";
655 case RES_IGNTC: return "igntc";
656 case RES_RECURSE: return "recurs";
657 case RES_DEFNAMES: return "defnam";
658 case RES_STAYOPEN: return "styopn";
659 case RES_DNSRCH: return "dnsrch";
660 case RES_INSECURE1: return "insecure1";
661 case RES_INSECURE2: return "insecure2";
662 case RES_NOALIASES: return "noaliases";
663 case RES_USE_INET6: return "inet6";
664 #ifdef RES_USE_EDNS0 /*%< KAME extension */
665 case RES_USE_EDNS0: return "edns0";
666 case RES_NSID: return "nsid";
667 #endif
668 #ifdef RES_USE_DNAME
669 case RES_USE_DNAME: return "dname";
670 #endif
671 #ifdef RES_USE_DNSSEC
672 case RES_USE_DNSSEC: return "dnssec";
673 #endif
674 #ifdef RES_NOTLDQUERY
675 case RES_NOTLDQUERY: return "no-tld-query";
676 #endif
677 #ifdef RES_NO_NIBBLE2
678 case RES_NO_NIBBLE2: return "no-nibble2";
679 #endif
680 /* XXX nonreentrant */
681 default: sprintf(nbuf, "?0x%lx?", (u_long)option);
682 return (nbuf);
683 }
684 }
685
686 /*%
687 * Return a mnemonic for a time to live.
688 */
689 const char *
690 p_time(u_int32_t value) {
691 char *nbuf = p_time_nbuf;
692
693 if (ns_format_ttl(value, nbuf, sizeof nbuf) < 0)
694 sprintf(nbuf, "%u", value);
695 return (nbuf);
696 }
697
698 /*%
699 * Return a string for the rcode.
700 */
701 const char *
702 p_rcode(int rcode) {
703 return (sym_ntos(__p_rcode_syms, rcode, (int *)0));
704 }
705
706 /*%
707 * Return a string for a res_sockaddr_union.
708 */
709 const char *
710 p_sockun(union res_sockaddr_union u, char *buf, size_t size) {
711 char ret[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:123.123.123.123"];
712
713 switch (u.sin.sin_family) {
714 case AF_INET:
715 inet_ntop(AF_INET, &u.sin.sin_addr, ret, sizeof ret);
716 break;
717 #ifdef HAS_INET6_STRUCTS
718 case AF_INET6:
719 inet_ntop(AF_INET6, &u.sin6.sin6_addr, ret, sizeof ret);
720 break;
721 #endif
722 default:
723 sprintf(ret, "[af%d]", u.sin.sin_family);
724 break;
725 }
726 if (size > 0U) {
727 strncpy(buf, ret, size - 1);
728 buf[size - 1] = '0';
729 }
730 return (buf);
731 }
732
733 /*%
734 * routines to convert between on-the-wire RR format and zone file format.
735 * Does not contain conversion to/from decimal degrees; divide or multiply
736 * by 60*60*1000 for that.
737 */
738
739 static unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000,
740 1000000,10000000,100000000,1000000000};
741
742 /*% takes an XeY precision/size value, returns a string representation. */
743 static const char *
744 precsize_ntoa(prec)
745 u_int8_t prec;
746 {
747 char *retbuf = precsize_ntoa_retbuf;
748 unsigned long val;
749 int mantissa, exponent;
750
751 mantissa = (int)((prec >> 4) & 0x0f) % 10;
752 exponent = (int)((prec >> 0) & 0x0f) % 10;
753
754 val = mantissa * poweroften[exponent];
755
756 (void) sprintf(retbuf, "%lu.%.2lu", val/100, val%100);
757 return (retbuf);
758 }
759
760 /*% converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */
761 static u_int8_t
762 precsize_aton(const char **strptr) {
763 unsigned int mval = 0, cmval = 0;
764 u_int8_t retval = 0;
765 const char *cp;
766 int exponent;
767 int mantissa;
768
769 cp = *strptr;
770
771 while (isdigit((unsigned char)*cp))
772 mval = mval * 10 + (*cp++ - '0');
773
774 if (*cp == '.') { /*%< centimeters */
775 cp++;
776 if (isdigit((unsigned char)*cp)) {
777 cmval = (*cp++ - '0') * 10;
778 if (isdigit((unsigned char)*cp)) {
779 cmval += (*cp++ - '0');
780 }
781 }
782 }
783 cmval = (mval * 100) + cmval;
784
785 for (exponent = 0; exponent < 9; exponent++)
786 if (cmval < poweroften[exponent+1])
787 break;
788
789 mantissa = cmval / poweroften[exponent];
790 if (mantissa > 9)
791 mantissa = 9;
792
793 retval = (mantissa << 4) | exponent;
794
795 *strptr = cp;
796
797 return (retval);
798 }
799
800 /*% converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */
801 static u_int32_t
802 latlon2ul(const char **latlonstrptr, int *which) {
803 const char *cp;
804 u_int32_t retval;
805 int deg = 0, min = 0, secs = 0, secsfrac = 0;
806
807 cp = *latlonstrptr;
808
809 while (isdigit((unsigned char)*cp))
810 deg = deg * 10 + (*cp++ - '0');
811
812 while (isspace((unsigned char)*cp))
813 cp++;
814
815 if (!(isdigit((unsigned char)*cp)))
816 goto fndhemi;
817
818 while (isdigit((unsigned char)*cp))
819 min = min * 10 + (*cp++ - '0');
820
821 while (isspace((unsigned char)*cp))
822 cp++;
823
824 if (!(isdigit((unsigned char)*cp)))
825 goto fndhemi;
826
827 while (isdigit((unsigned char)*cp))
828 secs = secs * 10 + (*cp++ - '0');
829
830 if (*cp == '.') { /*%< decimal seconds */
831 cp++;
832 if (isdigit((unsigned char)*cp)) {
833 secsfrac = (*cp++ - '0') * 100;
834 if (isdigit((unsigned char)*cp)) {
835 secsfrac += (*cp++ - '0') * 10;
836 if (isdigit((unsigned char)*cp)) {
837 secsfrac += (*cp++ - '0');
838 }
839 }
840 }
841 }
842
843 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */
844 cp++;
845
846 while (isspace((unsigned char)*cp))
847 cp++;
848
849 fndhemi:
850 switch (*cp) {
851 case 'N': case 'n':
852 case 'E': case 'e':
853 retval = ((unsigned)1<<31)
854 + (((((deg * 60) + min) * 60) + secs) * 1000)
855 + secsfrac;
856 break;
857 case 'S': case 's':
858 case 'W': case 'w':
859 retval = ((unsigned)1<<31)
860 - (((((deg * 60) + min) * 60) + secs) * 1000)
861 - secsfrac;
862 break;
863 default:
864 retval = 0; /*%< invalid value -- indicates error */
865 break;
866 }
867
868 switch (*cp) {
869 case 'N': case 'n':
870 case 'S': case 's':
871 *which = 1; /*%< latitude */
872 break;
873 case 'E': case 'e':
874 case 'W': case 'w':
875 *which = 2; /*%< longitude */
876 break;
877 default:
878 *which = 0; /*%< error */
879 break;
880 }
881
882 cp++; /*%< skip the hemisphere */
883 while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */
884 cp++;
885
886 while (isspace((unsigned char)*cp)) /*%< move to next field */
887 cp++;
888
889 *latlonstrptr = cp;
890
891 return (retval);
892 }
893
894 /*%
895 * converts a zone file representation in a string to an RDATA on-the-wire
896 * representation. */
897 int
898 loc_aton(ascii, binary)
899 const char *ascii;
900 u_char *binary;
901 {
902 const char *cp, *maxcp;
903 u_char *bcp;
904
905 u_int32_t latit = 0, longit = 0, alt = 0;
906 u_int32_t lltemp1 = 0, lltemp2 = 0;
907 int altmeters = 0, altfrac = 0, altsign = 1;
908 u_int8_t hp = 0x16; /*%< default = 1e6 cm = 10000.00m = 10km */
909 u_int8_t vp = 0x13; /*%< default = 1e3 cm = 10.00m */
910 u_int8_t siz = 0x12; /*%< default = 1e2 cm = 1.00m */
911 int which1 = 0, which2 = 0;
912
913 cp = ascii;
914 maxcp = cp + strlen(ascii);
915
916 lltemp1 = latlon2ul(&cp, &which1);
917
918 lltemp2 = latlon2ul(&cp, &which2);
919
920 switch (which1 + which2) {
921 case 3: /*%< 1 + 2, the only valid combination */
922 if ((which1 == 1) && (which2 == 2)) { /*%< normal case */
923 latit = lltemp1;
924 longit = lltemp2;
925 } else if ((which1 == 2) && (which2 == 1)) { /*%< reversed */
926 longit = lltemp1;
927 latit = lltemp2;
928 } else { /*%< some kind of brokenness */
929 return (0);
930 }
931 break;
932 default: /*%< we didn't get one of each */
933 return (0);
934 }
935
936 /* altitude */
937 if (*cp == '-') {
938 altsign = -1;
939 cp++;
940 }
941
942 if (*cp == '+')
943 cp++;
944
945 while (isdigit((unsigned char)*cp))
946 altmeters = altmeters * 10 + (*cp++ - '0');
947
948 if (*cp == '.') { /*%< decimal meters */
949 cp++;
950 if (isdigit((unsigned char)*cp)) {
951 altfrac = (*cp++ - '0') * 10;
952 if (isdigit((unsigned char)*cp)) {
953 altfrac += (*cp++ - '0');
954 }
955 }
956 }
957
958 alt = (10000000 + (altsign * (altmeters * 100 + altfrac)));
959
960 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */
961 cp++;
962
963 while (isspace((unsigned char)*cp) && (cp < maxcp))
964 cp++;
965
966 if (cp >= maxcp)
967 goto defaults;
968
969 siz = precsize_aton(&cp);
970
971 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */
972 cp++;
973
974 while (isspace((unsigned char)*cp) && (cp < maxcp))
975 cp++;
976
977 if (cp >= maxcp)
978 goto defaults;
979
980 hp = precsize_aton(&cp);
981
982 while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */
983 cp++;
984
985 while (isspace((unsigned char)*cp) && (cp < maxcp))
986 cp++;
987
988 if (cp >= maxcp)
989 goto defaults;
990
991 vp = precsize_aton(&cp);
992
993 defaults:
994
995 bcp = binary;
996 *bcp++ = (u_int8_t) 0; /*%< version byte */
997 *bcp++ = siz;
998 *bcp++ = hp;
999 *bcp++ = vp;
1000 PUTLONG(latit,bcp);
1001 PUTLONG(longit,bcp);
1002 PUTLONG(alt,bcp);
1003
1004 return (16); /*%< size of RR in octets */
1005 }
1006
1007 /*% takes an on-the-wire LOC RR and formats it in a human readable format. */
1008 const char *
1009 loc_ntoa(binary, ascii)
1010 const u_char *binary;
1011 char *ascii;
1012 {
1013 static const char *error = "?";
1014 static char tmpbuf[sizeof
1015 "1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"];
1016 const u_char *cp = binary;
1017
1018 int latdeg, latmin, latsec, latsecfrac;
1019 int longdeg, longmin, longsec, longsecfrac;
1020 char northsouth, eastwest;
1021 const char *altsign;
1022 int altmeters, altfrac;
1023
1024 const u_int32_t referencealt = 100000 * 100;
1025
1026 int32_t latval, longval, altval;
1027 u_int32_t templ;
1028 u_int8_t sizeval, hpval, vpval, versionval;
1029
1030 char *sizestr, *hpstr, *vpstr;
1031
1032 versionval = *cp++;
1033
1034 if (ascii == NULL)
1035 ascii = tmpbuf;
1036
1037 if (versionval) {
1038 (void) sprintf(ascii, "; error: unknown LOC RR version");
1039 return (ascii);
1040 }
1041
1042 sizeval = *cp++;
1043
1044 hpval = *cp++;
1045 vpval = *cp++;
1046
1047 GETLONG(templ, cp);
1048 latval = (templ - ((unsigned)1<<31));
1049
1050 GETLONG(templ, cp);
1051 longval = (templ - ((unsigned)1<<31));
1052
1053 GETLONG(templ, cp);
1054 if (templ < referencealt) { /*%< below WGS 84 spheroid */
1055 altval = referencealt - templ;
1056 altsign = "-";
1057 } else {
1058 altval = templ - referencealt;
1059 altsign = "";
1060 }
1061
1062 if (latval < 0) {
1063 northsouth = 'S';
1064 latval = -latval;
1065 } else
1066 northsouth = 'N';
1067
1068 latsecfrac = latval % 1000;
1069 latval = latval / 1000;
1070 latsec = latval % 60;
1071 latval = latval / 60;
1072 latmin = latval % 60;
1073 latval = latval / 60;
1074 latdeg = latval;
1075
1076 if (longval < 0) {
1077 eastwest = 'W';
1078 longval = -longval;
1079 } else
1080 eastwest = 'E';
1081
1082 longsecfrac = longval % 1000;
1083 longval = longval / 1000;
1084 longsec = longval % 60;
1085 longval = longval / 60;
1086 longmin = longval % 60;
1087 longval = longval / 60;
1088 longdeg = longval;
1089
1090 altfrac = altval % 100;
1091 altmeters = (altval / 100);
1092
1093 sizestr = strdup(precsize_ntoa(sizeval));
1094 hpstr = strdup(precsize_ntoa(hpval));
1095 vpstr = strdup(precsize_ntoa(vpval));
1096
1097 sprintf(ascii,
1098 "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm",
1099 latdeg, latmin, latsec, latsecfrac, northsouth,
1100 longdeg, longmin, longsec, longsecfrac, eastwest,
1101 altsign, altmeters, altfrac,
1102 (sizestr != NULL) ? sizestr : error,
1103 (hpstr != NULL) ? hpstr : error,
1104 (vpstr != NULL) ? vpstr : error);
1105
1106 if (sizestr != NULL)
1107 free(sizestr);
1108 if (hpstr != NULL)
1109 free(hpstr);
1110 if (vpstr != NULL)
1111 free(vpstr);
1112
1113 return (ascii);
1114 }
1115
1116
1117 /*% Return the number of DNS hierarchy levels in the name. */
1118 int
1119 dn_count_labels(const char *name) {
1120 int i, len, count;
1121
1122 len = strlen(name);
1123 for (i = 0, count = 0; i < len; i++) {
1124 /* XXX need to check for \. or use named's nlabels(). */
1125 if (name[i] == '.')
1126 count++;
1127 }
1128
1129 /* don't count initial wildcard */
1130 if (name[0] == '*')
1131 if (count)
1132 count--;
1133
1134 /* don't count the null label for root. */
1135 /* if terminating '.' not found, must adjust */
1136 /* count to include last label */
1137 if (len > 0 && name[len-1] != '.')
1138 count++;
1139 return (count);
1140 }
1141
1142 /*%
1143 * Make dates expressed in seconds-since-Jan-1-1970 easy to read.
1144 * SIG records are required to be printed like this, by the Secure DNS RFC.
1145 */
1146 char *
1147 p_secstodate (u_long secs) {
1148 char *output = p_secstodate_output;
1149 time_t clock = secs;
1150 struct tm *time;
1151 #ifdef HAVE_TIME_R
1152 struct tm res;
1153
1154 time = gmtime_r(&clock, &res);
1155 #else
1156 time = gmtime(&clock);
1157 #endif
1158 time->tm_year += 1900;
1159 time->tm_mon += 1;
1160 sprintf(output, "%04d%02d%02d%02d%02d%02d",
1161 time->tm_year, time->tm_mon, time->tm_mday,
1162 time->tm_hour, time->tm_min, time->tm_sec);
1163 return (output);
1164 }
1165
1166 u_int16_t
1167 res_nametoclass(const char *buf, int *successp) {
1168 unsigned long result;
1169 char *endptr;
1170 int success;
1171
1172 result = sym_ston(__p_class_syms, buf, &success);
1173 if (success)
1174 goto done;
1175
1176 if (strncasecmp(buf, "CLASS", 5) != 0 ||
1177 !isdigit((unsigned char)buf[5]))
1178 goto done;
1179 errno = 0;
1180 result = strtoul(buf + 5, &endptr, 10);
1181 if (errno == 0 && *endptr == '\0' && result <= 0xffffU)
1182 success = 1;
1183 done:
1184 if (successp)
1185 *successp = success;
1186 return (result);
1187 }
1188
1189 u_int16_t
1190 res_nametotype(const char *buf, int *successp) {
1191 unsigned long result;
1192 char *endptr;
1193 int success;
1194
1195 result = sym_ston(__p_type_syms, buf, &success);
1196 if (success)
1197 goto done;
1198
1199 if (strncasecmp(buf, "type", 4) != 0 ||
1200 !isdigit((unsigned char)buf[4]))
1201 goto done;
1202 errno = 0;
1203 result = strtoul(buf + 4, &endptr, 10);
1204 if (errno == 0 && *endptr == '\0' && result <= 0xffffU)
1205 success = 1;
1206 done:
1207 if (successp)
1208 *successp = success;
1209 return (result);
1210 }
1211
1212 #ifdef _LIBC
1213 /*
1214 * Weak aliases for applications that use certain private entry points,
1215 * and fail to include <resolv.h>.
1216 */
1217 #undef fp_resstat
1218 __weak_reference(__fp_resstat, fp_resstat);
1219 #undef p_fqnname
1220 __weak_reference(__p_fqnname, p_fqnname);
1221 #undef sym_ston
1222 __weak_reference(__sym_ston, sym_ston);
1223 #undef sym_ntos
1224 __weak_reference(__sym_ntos, sym_ntos);
1225 #undef sym_ntop
1226 __weak_reference(__sym_ntop, sym_ntop);
1227 #undef dn_count_labels
1228 __weak_reference(__dn_count_labels, dn_count_labels);
1229 #undef p_secstodate
1230 __weak_reference(__p_secstodate, p_secstodate);
1231 #endif
1232 /*! \file */
DragonFly BSD