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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 /*
31 * Portions Copyright (c) 1993 by Digital Equipment Corporation.
32 *
33 * Permission to use, copy, modify, and distribute this software for any
34 * purpose with or without fee is hereby granted, provided that the above
35 * copyright notice and this permission notice appear in all copies, and that
36 * the name of Digital Equipment Corporation not be used in advertising or
37 * publicity pertaining to distribution of the document or software without
38 * specific, written prior permission.
39 *
40 * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
41 * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
42 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
43 * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
44 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
45 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
46 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
47 * SOFTWARE.
48 */
49
50 /*
51 * Portions Copyright (c) 1995 by International Business Machines, Inc.
52 *
53 * International Business Machines, Inc. (hereinafter called IBM) grants
54 * permission under its copyrights to use, copy, modify, and distribute this
55 * Software with or without fee, provided that the above copyright notice and
56 * all paragraphs of this notice appear in all copies, and that the name of IBM
57 * not be used in connection with the marketing of any product incorporating
58 * the Software or modifications thereof, without specific, written prior
59 * permission.
60 *
61 * To the extent it has a right to do so, IBM grants an immunity from suit
62 * under its patents, if any, for the use, sale or manufacture of products to
63 * the extent that such products are used for performing Domain Name System
64 * dynamic updates in TCP/IP networks by means of the Software. No immunity is
65 * granted for any product per se or for any other function of any product.
66 *
67 * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES,
68 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
69 * PARTICULAR PURPOSE. IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL,
70 * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING
71 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN
72 * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES.
73 */
74
75 /*
76 * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
77 *
78 * Permission to use, copy, modify, and distribute this software for any
79 * purpose with or without fee is hereby granted, provided that the above
80 * copyright notice and this permission notice appear in all copies.
81 *
82 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
83 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
84 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
85 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
86 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
87 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
88 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
89 * SOFTWARE.
90 */
91
92 #include <sys/types.h>
93 #include <sys/param.h>
94 #include <sys/socket.h>
95
96 #include <netinet/in.h>
97 #include <arpa/inet.h>
98 #include <arpa/nameser.h>
99
100 #include <ctype.h>
101 #include <errno.h>
102 #include <math.h>
103 #include <netdb.h>
104 #include <resolv/resolv-internal.h>
105 #include <stdio.h>
106 #include <stdlib.h>
107 #include <string.h>
108 #include <time.h>
109 #include <shlib-compat.h>
110 #include <libc-diag.h>
111
112 #ifdef SPRINTF_CHAR
113 # define SPRINTF(x) strlen(sprintf/**/x)
114 #else
115 # define SPRINTF(x) sprintf x
116 #endif
117
118 extern const char *_res_sectioncodes[] attribute_hidden;
119
120 /* _res_opcodes was exported by accident as a variable. */
121 #if SHLIB_COMPAT (libresolv, GLIBC_2_0, GLIBC_2_26)
122 static const char *res_opcodes[] =
123 #else
124 static const char res_opcodes[][9] =
125 #endif
126 {
127 "QUERY",
128 "IQUERY",
129 "CQUERYM",
130 "CQUERYU", /* experimental */
131 "NOTIFY", /* experimental */
132 "UPDATE",
133 "6",
134 "7",
135 "8",
136 "9",
137 "10",
138 "11",
139 "12",
140 "13",
141 "ZONEINIT",
142 "ZONEREF",
143 };
144 #if SHLIB_COMPAT (libresolv, GLIBC_2_0, GLIBC_2_26)
145 strong_alias (res_opcodes, _res_opcodes)
146 #endif
147
148 static const char *p_section(int section, int opcode);
149
150 /*
151 * Print the current options.
152 */
153 void
154 fp_resstat(const res_state statp, FILE *file) {
155 u_long mask;
156
157 fprintf(file, ";; res options:");
158 for (mask = 1; mask != 0; mask <<= 1)
159 if (statp->options & mask)
160 fprintf(file, " %s", p_option(mask));
161 putc('\n', file);
162 }
163
164 static void
165 do_section (int pfcode, ns_msg *handle, ns_sect section, int pflag, FILE *file)
166 {
167 int n, sflag, rrnum;
168 static int buflen = 2048;
169 char *buf;
170 ns_opcode opcode;
171 ns_rr rr;
172
173 /*
174 * Print answer records.
175 */
176 sflag = (pfcode & pflag);
177 if (pfcode && !sflag)
178 return;
179
180 buf = malloc(buflen);
181 if (buf == NULL) {
182 fprintf(file, ";; memory allocation failure\n");
183 return;
184 }
185
186 opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode);
187 rrnum = 0;
188 for (;;) {
189 if (ns_parserr(handle, section, rrnum, &rr)) {
190 if (errno != ENODEV)
191 fprintf(file, ";; ns_parserr: %s\n",
192 strerror(errno));
193 else if (rrnum > 0 && sflag != 0 &&
194 (pfcode & RES_PRF_HEAD1))
195 putc('\n', file);
196 goto cleanup;
197 }
198 if (rrnum == 0 && sflag != 0 && (pfcode & RES_PRF_HEAD1))
199 fprintf(file, ";; %s SECTION:\n",
200 p_section(section, opcode));
201 if (section == ns_s_qd)
202 fprintf(file, ";;\t%s, type = %s, class = %s\n",
203 ns_rr_name(rr),
204 p_type(ns_rr_type(rr)),
205 p_class(ns_rr_class(rr)));
206 else {
207 n = ns_sprintrr(handle, &rr, NULL, NULL,
208 buf, buflen);
209 if (n < 0) {
210 if (errno == ENOSPC) {
211 free(buf);
212 buf = NULL;
213 if (buflen < 131072)
214 buf = malloc(buflen += 1024);
215 if (buf == NULL) {
216 fprintf(file,
217 ";; memory allocation failure\n");
218 return;
219 }
220 continue;
221 }
222 fprintf(file, ";; ns_sprintrr: %s\n",
223 strerror(errno));
224 goto cleanup;
225 }
226 fputs(buf, file);
227 fputc('\n', file);
228 }
229 rrnum++;
230 }
231 cleanup:
232 free(buf);
233 }
234
235 /*
236 * Print the contents of a query.
237 * This is intended to be primarily a debugging routine.
238 */
239 void
240 fp_nquery (const unsigned char *msg, int len, FILE *file)
241 {
242 ns_msg handle;
243 int qdcount, ancount, nscount, arcount;
244 u_int opcode, rcode, id;
245
246 /* There is no need to initialize _res: If _res is not yet
247 initialized, _res.pfcode is zero. But initialization will
248 leave it at zero, too. _res.pfcode is an unsigned long,
249 but the code here assumes that the flags fit into an int,
250 so use that. */
251 int pfcode = _res.pfcode;
252
253 if (ns_initparse(msg, len, &handle) < 0) {
254 fprintf(file, ";; ns_initparse: %s\n", strerror(errno));
255 return;
256 }
257 opcode = ns_msg_getflag(handle, ns_f_opcode);
258 rcode = ns_msg_getflag(handle, ns_f_rcode);
259 id = ns_msg_id(handle);
260 qdcount = ns_msg_count(handle, ns_s_qd);
261 ancount = ns_msg_count(handle, ns_s_an);
262 nscount = ns_msg_count(handle, ns_s_ns);
263 arcount = ns_msg_count(handle, ns_s_ar);
264
265 /*
266 * Print header fields.
267 */
268 if ((!pfcode) || (pfcode & RES_PRF_HEADX) || rcode)
269 fprintf(file,
270 ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n",
271 res_opcodes[opcode], p_rcode(rcode), id);
272 if ((!pfcode) || (pfcode & RES_PRF_HEADX))
273 putc(';', file);
274 if ((!pfcode) || (pfcode & RES_PRF_HEAD2)) {
275 fprintf(file, "; flags:");
276 if (ns_msg_getflag(handle, ns_f_qr))
277 fprintf(file, " qr");
278 if (ns_msg_getflag(handle, ns_f_aa))
279 fprintf(file, " aa");
280 if (ns_msg_getflag(handle, ns_f_tc))
281 fprintf(file, " tc");
282 if (ns_msg_getflag(handle, ns_f_rd))
283 fprintf(file, " rd");
284 if (ns_msg_getflag(handle, ns_f_ra))
285 fprintf(file, " ra");
286 if (ns_msg_getflag(handle, ns_f_z))
287 fprintf(file, " ??");
288 if (ns_msg_getflag(handle, ns_f_ad))
289 fprintf(file, " ad");
290 if (ns_msg_getflag(handle, ns_f_cd))
291 fprintf(file, " cd");
292 }
293 if ((!pfcode) || (pfcode & RES_PRF_HEAD1)) {
294 fprintf(file, "; %s: %d",
295 p_section(ns_s_qd, opcode), qdcount);
296 fprintf(file, ", %s: %d",
297 p_section(ns_s_an, opcode), ancount);
298 fprintf(file, ", %s: %d",
299 p_section(ns_s_ns, opcode), nscount);
300 fprintf(file, ", %s: %d",
301 p_section(ns_s_ar, opcode), arcount);
302 }
303 if ((!pfcode) || (pfcode &
304 (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) {
305 putc('\n',file);
306 }
307 /*
308 * Print the various sections.
309 */
310 do_section (pfcode, &handle, ns_s_qd, RES_PRF_QUES, file);
311 do_section (pfcode, &handle, ns_s_an, RES_PRF_ANS, file);
312 do_section (pfcode, &handle, ns_s_ns, RES_PRF_AUTH, file);
313 do_section (pfcode, &handle, ns_s_ar, RES_PRF_ADD, file);
314 if (qdcount == 0 && ancount == 0 &&
315 nscount == 0 && arcount == 0)
316 putc('\n', file);
317 }
318 libresolv_hidden_def (fp_nquery)
319
320 void
321 fp_query (const unsigned char *msg, FILE *file)
322 {
323 fp_nquery (msg, PACKETSZ, file);
324 }
325 libresolv_hidden_def (fp_query)
326
327 void
328 p_query (const unsigned char *msg)
329 {
330 fp_query (msg, stdout);
331 }
332
333 const u_char *
334 p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) {
335 char name[MAXDNAME];
336 int n;
337
338 if ((n = __libc_dn_expand (msg, msg + len, cp, name, sizeof name)) < 0)
339 return (NULL);
340 if (name[0] == '\0')
341 putc('.', file);
342 else
343 fputs(name, file);
344 return (cp + n);
345 }
346 libresolv_hidden_def (p_cdnname)
347
348 const u_char *
349 p_cdname(const u_char *cp, const u_char *msg, FILE *file) {
350 return (p_cdnname(cp, msg, PACKETSZ, file));
351 }
352
353 /* Return a fully-qualified domain name from a compressed name (with
354 length supplied). */
355
356 const u_char *
357 p_fqnname (const u_char *cp, const u_char *msg, int msglen, char *name,
358 int namelen)
359 {
360 int n, newlen;
361
362 if ((n = __libc_dn_expand (msg, cp + msglen, cp, name, namelen)) < 0)
363 return (NULL);
364 newlen = strlen(name);
365 if (newlen == 0 || name[newlen - 1] != '.') {
366 if (newlen + 1 >= namelen) /* Lack space for final dot */
367 return (NULL);
368 else
369 strcpy(name + newlen, ".");
370 }
371 return (cp + n);
372 }
373 libresolv_hidden_def (p_fqnname)
374
375 /* XXX: the rest of these functions need to become length-limited, too. */
376
377 const u_char *
378 p_fqname(const u_char *cp, const u_char *msg, FILE *file) {
379 char name[MAXDNAME];
380 const u_char *n;
381
382 n = p_fqnname(cp, msg, MAXCDNAME, name, sizeof name);
383 if (n == NULL)
384 return (NULL);
385 fputs(name, file);
386 return (n);
387 }
388
389 /*
390 * Names of RR classes and qclasses. Classes and qclasses are the same, except
391 * that C_ANY is a qclass but not a class. (You can ask for records of class
392 * C_ANY, but you can't have any records of that class in the database.)
393 */
394 extern const struct res_sym __p_class_syms[];
395 libresolv_hidden_proto (__p_class_syms)
396 const struct res_sym __p_class_syms[] = {
397 {C_IN, (char *) "IN"},
398 {C_CHAOS, (char *) "CHAOS"},
399 {C_HS, (char *) "HS"},
400 {C_HS, (char *) "HESIOD"},
401 {C_ANY, (char *) "ANY"},
402 {C_NONE, (char *) "NONE"},
403 {C_IN, NULL, NULL}
404 };
405 libresolv_hidden_data_def (__p_class_syms)
406
407 /*
408 * Names of message sections.
409 */
410 const struct res_sym __p_default_section_syms[] attribute_hidden = {
411 {ns_s_qd, (char *) "QUERY"},
412 {ns_s_an, (char *) "ANSWER"},
413 {ns_s_ns, (char *) "AUTHORITY"},
414 {ns_s_ar, (char *) "ADDITIONAL"},
415 {0, NULL, NULL}
416 };
417
418 const struct res_sym __p_update_section_syms[] attribute_hidden = {
419 {S_ZONE, (char *) "ZONE"},
420 {S_PREREQ, (char *) "PREREQUISITE"},
421 {S_UPDATE, (char *) "UPDATE"},
422 {S_ADDT, (char *) "ADDITIONAL"},
423 {0, NULL, NULL}
424 };
425
426 /*
427 * Names of RR types and qtypes. The list is incomplete because its
428 * size is part of the ABI.
429 */
430 extern const struct res_sym __p_type_syms[];
431 libresolv_hidden_proto (__p_type_syms)
432 const struct res_sym __p_type_syms[] = {
433 {ns_t_a, (char *) "A", (char *) "address"},
434 {ns_t_ns, (char *) "NS", (char *) "name server"},
435 {ns_t_md, (char *) "MD", (char *) "mail destination (deprecated)"},
436 {ns_t_mf, (char *) "MF", (char *) "mail forwarder (deprecated)"},
437 {ns_t_cname, (char *) "CNAME", (char *) "canonical name"},
438 {ns_t_soa, (char *) "SOA", (char *) "start of authority"},
439 {ns_t_mb, (char *) "MB", (char *) "mailbox"},
440 {ns_t_mg, (char *) "MG", (char *) "mail group member"},
441 {ns_t_mr, (char *) "MR", (char *) "mail rename"},
442 {ns_t_null, (char *) "NULL", (char *) "null"},
443 {ns_t_wks, (char *) "WKS", (char *) "well-known service (deprecated)"},
444 {ns_t_ptr, (char *) "PTR", (char *) "domain name pointer"},
445 {ns_t_hinfo, (char *) "HINFO", (char *) "host information"},
446 {ns_t_minfo, (char *) "MINFO", (char *) "mailbox information"},
447 {ns_t_mx, (char *) "MX", (char *) "mail exchanger"},
448 {ns_t_txt, (char *) "TXT", (char *) "text"},
449 {ns_t_rp, (char *) "RP", (char *) "responsible person"},
450 {ns_t_afsdb, (char *) "AFSDB", (char *) "DCE or AFS server"},
451 {ns_t_x25, (char *) "X25", (char *) "X25 address"},
452 {ns_t_isdn, (char *) "ISDN", (char *) "ISDN address"},
453 {ns_t_rt, (char *) "RT", (char *) "router"},
454 {ns_t_nsap, (char *) "NSAP", (char *) "nsap address"},
455 {ns_t_nsap_ptr, (char *) "NSAP_PTR", (char *) "domain name pointer"},
456 {ns_t_sig, (char *) "SIG", (char *) "signature"},
457 {ns_t_key, (char *) "KEY", (char *) "key"},
458 {ns_t_px, (char *) "PX", (char *) "mapping information"},
459 {ns_t_gpos, (char *) "GPOS",
460 (char *) "geographical position (withdrawn)"},
461 {ns_t_aaaa, (char *) "AAAA", (char *) "IPv6 address"},
462 {ns_t_loc, (char *) "LOC", (char *) "location"},
463 {ns_t_nxt, (char *) "NXT", (char *) "next valid name (unimplemented)"},
464 {ns_t_eid, (char *) "EID", (char *) "endpoint identifier (unimplemented)"},
465 {ns_t_nimloc, (char *) "NIMLOC", (char *) "NIMROD locator (unimplemented)"},
466 {ns_t_srv, (char *) "SRV", (char *) "server selection"},
467 {ns_t_atma, (char *) "ATMA", (char *) "ATM address (unimplemented)"},
468 {ns_t_dname, (char *) "DNAME", (char *) "Non-terminal DNAME (for IPv6)"},
469 {ns_t_tsig, (char *) "TSIG", (char *) "transaction signature"},
470 {ns_t_ixfr, (char *) "IXFR", (char *) "incremental zone transfer"},
471 {ns_t_axfr, (char *) "AXFR", (char *) "zone transfer"},
472 {ns_t_mailb, (char *) "MAILB", (char *) "mailbox-related data (deprecated)"},
473 {ns_t_maila, (char *) "MAILA", (char *) "mail agent (deprecated)"},
474 {ns_t_naptr, (char *) "NAPTR", (char *) "URN Naming Authority"},
475 {ns_t_kx, (char *) "KX", (char *) "Key Exchange"},
476 {ns_t_cert, (char *) "CERT", (char *) "Certificate"},
477 {ns_t_any, (char *) "ANY", (char *) "\"any\""},
478 {0, NULL, NULL}, /* Padding to preserve ABI. */
479 {0, NULL, NULL}
480 };
481 libresolv_hidden_data_def (__p_type_syms)
482
483 /*
484 * Names of DNS rcodes.
485 */
486 const struct res_sym __p_rcode_syms[] attribute_hidden = {
487 {ns_r_noerror, (char *) "NOERROR", (char *) "no error"},
488 {ns_r_formerr, (char *) "FORMERR", (char *) "format error"},
489 {ns_r_servfail, (char *) "SERVFAIL", (char *) "server failed"},
490 {ns_r_nxdomain, (char *) "NXDOMAIN", (char *) "no such domain name"},
491 {ns_r_notimpl, (char *) "NOTIMP", (char *) "not implemented"},
492 {ns_r_refused, (char *) "REFUSED", (char *) "refused"},
493 {ns_r_yxdomain, (char *) "YXDOMAIN", (char *) "domain name exists"},
494 {ns_r_yxrrset, (char *) "YXRRSET", (char *) "rrset exists"},
495 {ns_r_nxrrset, (char *) "NXRRSET", (char *) "rrset doesn't exist"},
496 {ns_r_notauth, (char *) "NOTAUTH", (char *) "not authoritative"},
497 {ns_r_notzone, (char *) "NOTZONE", (char *) "Not in zone"},
498 {ns_r_max, (char *) "", (char *) ""},
499 {ns_r_badsig, (char *) "BADSIG", (char *) "bad signature"},
500 {ns_r_badkey, (char *) "BADKEY", (char *) "bad key"},
501 {ns_r_badtime, (char *) "BADTIME", (char *) "bad time"},
502 {0, NULL, NULL}
503 };
504
505 int
506 sym_ston(const struct res_sym *syms, const char *name, int *success) {
507 for ((void)NULL; syms->name != 0; syms++) {
508 if (strcasecmp (name, syms->name) == 0) {
509 if (success)
510 *success = 1;
511 return (syms->number);
512 }
513 }
514 if (success)
515 *success = 0;
516 return (syms->number); /* The default value. */
517 }
518
519 const char *
520 sym_ntos(const struct res_sym *syms, int number, int *success) {
521 static char unname[20];
522
523 for ((void)NULL; syms->name != 0; syms++) {
524 if (number == syms->number) {
525 if (success)
526 *success = 1;
527 return (syms->name);
528 }
529 }
530
531 sprintf(unname, "%d", number); /* XXX nonreentrant */
532 if (success)
533 *success = 0;
534 return (unname);
535 }
536 libresolv_hidden_def (sym_ntos)
537
538 const char *
539 sym_ntop(const struct res_sym *syms, int number, int *success) {
540 static char unname[20];
541
542 for ((void)NULL; syms->name != 0; syms++) {
543 if (number == syms->number) {
544 if (success)
545 *success = 1;
546 return (syms->humanname);
547 }
548 }
549 sprintf(unname, "%d", number); /* XXX nonreentrant */
550 if (success)
551 *success = 0;
552 return (unname);
553 }
554
555 /*
556 * Return a string for the type.
557 */
558 const char *
559 p_type(int type) {
560 return (sym_ntos(__p_type_syms, type, (int *)0));
561 }
562 libresolv_hidden_def (p_type)
563
564 /*
565 * Return a string for the type.
566 */
567 static const char *
568 p_section(int section, int opcode) {
569 const struct res_sym *symbols;
570
571 switch (opcode) {
572 case ns_o_update:
573 symbols = __p_update_section_syms;
574 break;
575 default:
576 symbols = __p_default_section_syms;
577 break;
578 }
579 return (sym_ntos(symbols, section, (int *)0));
580 }
581
582 /*
583 * Return a mnemonic for class.
584 */
585 const char *
586 p_class(int class) {
587 return (sym_ntos(__p_class_syms, class, (int *)0));
588 }
589 libresolv_hidden_def (p_class)
590
591 /*
592 * Return a mnemonic for an option
593 */
594 const char *
595 p_option(u_long option) {
596 static char nbuf[40];
597
598 switch (option) {
599 case RES_INIT: return "init";
600 case RES_DEBUG: return "debug";
601 case RES_USEVC: return "use-vc";
602 case RES_IGNTC: return "igntc";
603 case RES_RECURSE: return "recurs";
604 case RES_DEFNAMES: return "defnam";
605 case RES_STAYOPEN: return "styopn";
606 case RES_DNSRCH: return "dnsrch";
607 case RES_NOALIASES: return "noaliases";
608 case RES_ROTATE: return "rotate";
609 case RES_USE_EDNS0: return "edns0";
610 case RES_SNGLKUP: return "single-request";
611 case RES_SNGLKUPREOP: return "single-request-reopen";
612 case RES_USE_DNSSEC: return "dnssec";
613 case RES_NOTLDQUERY: return "no-tld-query";
614 case RES_NORELOAD: return "no-reload";
615 case RES_TRUSTAD: return "trust-ad";
616 case RES_NOAAAA: return "no-aaaa";
617 /* XXX nonreentrant */
618 default: sprintf(nbuf, "?0x%lx?", (u_long)option);
619 return (nbuf);
620 }
621 }
622 libresolv_hidden_def (p_option)
623
624 /*
625 * Return a mnemonic for a time to live.
626 */
627 const char *
628 p_time(uint32_t value) {
629 static char nbuf[40]; /* XXX nonreentrant */
630
631 if (ns_format_ttl(value, nbuf, sizeof nbuf) < 0)
632 sprintf(nbuf, "%u", value);
633 return (nbuf);
634 }
635
636 /*
637 * Return a string for the rcode.
638 */
639 const char *
640 p_rcode(int rcode) {
641 return (sym_ntos(__p_rcode_syms, rcode, (int *)0));
642 }
643 libresolv_hidden_def (p_rcode)
644
645 /*
646 * routines to convert between on-the-wire RR format and zone file format.
647 * Does not contain conversion to/from decimal degrees; divide or multiply
648 * by 60*60*1000 for that.
649 */
650
651 static const unsigned int poweroften[10]=
652 { 1, 10, 100, 1000, 10000, 100000,
653 1000000,10000000,100000000,1000000000};
654
655 /* takes an XeY precision/size value, returns a string representation. */
656 static const char *
657 precsize_ntoa (uint8_t prec)
658 {
659 static char retbuf[sizeof "90000000.00"]; /* XXX nonreentrant */
660 unsigned long val;
661 int mantissa, exponent;
662
663 mantissa = (int)((prec >> 4) & 0x0f) % 10;
664 exponent = (int)((prec >> 0) & 0x0f) % 10;
665
666 val = mantissa * poweroften[exponent];
667
668 (void) sprintf(retbuf, "%ld.%.2ld", val/100, val%100);
669 return (retbuf);
670 }
671
672 /* converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */
673 static uint8_t
674 precsize_aton (const char **strptr)
675 {
676 unsigned int mval = 0, cmval = 0;
677 uint8_t retval = 0;
678 const char *cp;
679 int exponent;
680 int mantissa;
681
682 cp = *strptr;
683
684 while (isdigit(*cp))
685 mval = mval * 10 + (*cp++ - '0');
686
687 if (*cp == '.') { /* centimeters */
688 cp++;
689 if (isdigit(*cp)) {
690 cmval = (*cp++ - '0') * 10;
691 if (isdigit(*cp)) {
692 cmval += (*cp++ - '0');
693 }
694 }
695 }
696 cmval = (mval * 100) + cmval;
697
698 for (exponent = 0; exponent < 9; exponent++)
699 if (cmval < poweroften[exponent+1])
700 break;
701
702 mantissa = cmval / poweroften[exponent];
703 if (mantissa > 9)
704 mantissa = 9;
705
706 retval = (mantissa << 4) | exponent;
707
708 *strptr = cp;
709
710 return (retval);
711 }
712
713 /* converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */
714 static uint32_t
715 latlon2ul (const char **latlonstrptr, int *which)
716 {
717 const char *cp;
718 uint32_t retval;
719 int deg = 0, min = 0, secs = 0, secsfrac = 0;
720
721 cp = *latlonstrptr;
722
723 while (isdigit(*cp))
724 deg = deg * 10 + (*cp++ - '0');
725
726 while (isspace(*cp))
727 cp++;
728
729 if (!(isdigit(*cp)))
730 goto fndhemi;
731
732 while (isdigit(*cp))
733 min = min * 10 + (*cp++ - '0');
734
735 while (isspace(*cp))
736 cp++;
737
738 if (!(isdigit(*cp)))
739 goto fndhemi;
740
741 while (isdigit(*cp))
742 secs = secs * 10 + (*cp++ - '0');
743
744 if (*cp == '.') { /* decimal seconds */
745 cp++;
746 if (isdigit(*cp)) {
747 secsfrac = (*cp++ - '0') * 100;
748 if (isdigit(*cp)) {
749 secsfrac += (*cp++ - '0') * 10;
750 if (isdigit(*cp)) {
751 secsfrac += (*cp++ - '0');
752 }
753 }
754 }
755 }
756
757 while (!isspace(*cp)) /* if any trailing garbage */
758 cp++;
759
760 while (isspace(*cp))
761 cp++;
762
763 fndhemi:
764 switch (*cp) {
765 case 'N': case 'n':
766 case 'E': case 'e':
767 retval = ((unsigned)1<<31)
768 + (((((deg * 60) + min) * 60) + secs) * 1000)
769 + secsfrac;
770 break;
771 case 'S': case 's':
772 case 'W': case 'w':
773 retval = ((unsigned)1<<31)
774 - (((((deg * 60) + min) * 60) + secs) * 1000)
775 - secsfrac;
776 break;
777 default:
778 retval = 0; /* invalid value -- indicates error */
779 break;
780 }
781
782 switch (*cp) {
783 case 'N': case 'n':
784 case 'S': case 's':
785 *which = 1; /* latitude */
786 break;
787 case 'E': case 'e':
788 case 'W': case 'w':
789 *which = 2; /* longitude */
790 break;
791 default:
792 *which = 0; /* error */
793 break;
794 }
795
796 cp++; /* skip the hemisphere */
797
798 while (!isspace(*cp)) /* if any trailing garbage */
799 cp++;
800
801 while (isspace(*cp)) /* move to next field */
802 cp++;
803
804 *latlonstrptr = cp;
805
806 return (retval);
807 }
808
809 /* converts a zone file representation in a string to an RDATA on-the-wire
810 * representation. */
811 int
812 loc_aton (const char *ascii, u_char *binary)
813 {
814 const char *cp, *maxcp;
815 u_char *bcp;
816
817 uint32_t latit = 0, longit = 0, alt = 0;
818 uint32_t lltemp1 = 0, lltemp2 = 0;
819 int altmeters = 0, altfrac = 0, altsign = 1;
820 uint8_t hp = 0x16; /* default = 1e6 cm = 10000.00m = 10km */
821 uint8_t vp = 0x13; /* default = 1e3 cm = 10.00m */
822 uint8_t siz = 0x12; /* default = 1e2 cm = 1.00m */
823 int which1 = 0, which2 = 0;
824
825 cp = ascii;
826 maxcp = cp + strlen(ascii);
827
828 lltemp1 = latlon2ul(&cp, &which1);
829
830 lltemp2 = latlon2ul(&cp, &which2);
831
832 switch (which1 + which2) {
833 case 3: /* 1 + 2, the only valid combination */
834 if ((which1 == 1) && (which2 == 2)) { /* normal case */
835 latit = lltemp1;
836 longit = lltemp2;
837 } else if ((which1 == 2) && (which2 == 1)) { /* reversed */
838 longit = lltemp1;
839 latit = lltemp2;
840 } else { /* some kind of brokenness */
841 return (0);
842 }
843 break;
844 default: /* we didn't get one of each */
845 return (0);
846 }
847
848 /* altitude */
849 if (*cp == '-') {
850 altsign = -1;
851 cp++;
852 }
853
854 if (*cp == '+')
855 cp++;
856
857 while (isdigit(*cp))
858 altmeters = altmeters * 10 + (*cp++ - '0');
859
860 if (*cp == '.') { /* decimal meters */
861 cp++;
862 if (isdigit(*cp)) {
863 altfrac = (*cp++ - '0') * 10;
864 if (isdigit(*cp)) {
865 altfrac += (*cp++ - '0');
866 }
867 }
868 }
869
870 alt = (10000000 + (altsign * (altmeters * 100 + altfrac)));
871
872 while (!isspace(*cp) && (cp < maxcp)) /* if trailing garbage or m */
873 cp++;
874
875 while (isspace(*cp) && (cp < maxcp))
876 cp++;
877
878 if (cp >= maxcp)
879 goto defaults;
880
881 siz = precsize_aton(&cp);
882
883 while (!isspace(*cp) && (cp < maxcp)) /* if trailing garbage or m */
884 cp++;
885
886 while (isspace(*cp) && (cp < maxcp))
887 cp++;
888
889 if (cp >= maxcp)
890 goto defaults;
891
892 hp = precsize_aton(&cp);
893
894 while (!isspace(*cp) && (cp < maxcp)) /* if trailing garbage or m */
895 cp++;
896
897 while (isspace(*cp) && (cp < maxcp))
898 cp++;
899
900 if (cp >= maxcp)
901 goto defaults;
902
903 vp = precsize_aton(&cp);
904
905 defaults:
906
907 bcp = binary;
908 *bcp++ = (uint8_t) 0; /* version byte */
909 *bcp++ = siz;
910 *bcp++ = hp;
911 *bcp++ = vp;
912 PUTLONG(latit,bcp);
913 PUTLONG(longit,bcp);
914 PUTLONG(alt,bcp);
915
916 return (16); /* size of RR in octets */
917 }
918
919 /* takes an on-the-wire LOC RR and formats it in a human readable format. */
920 const char *
921 loc_ntoa (const u_char *binary, char *ascii)
922 {
923 static const char error[] = "?";
924 static char tmpbuf[sizeof
925 "1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"];
926 const u_char *cp = binary;
927
928 int latdeg, latmin, latsec, latsecfrac;
929 int longdeg, longmin, longsec, longsecfrac;
930 char northsouth, eastwest;
931 int altmeters, altfrac, altsign;
932
933 const uint32_t referencealt = 100000 * 100;
934
935 int32_t latval, longval, altval;
936 uint32_t templ;
937 uint8_t sizeval, hpval, vpval, versionval;
938
939 char *sizestr, *hpstr, *vpstr;
940
941 versionval = *cp++;
942
943 if (ascii == NULL)
944 ascii = tmpbuf;
945
946 if (versionval) {
947 (void) sprintf(ascii, "; error: unknown LOC RR version");
948 return (ascii);
949 }
950
951 sizeval = *cp++;
952
953 hpval = *cp++;
954 vpval = *cp++;
955
956 GETLONG(templ, cp);
957 latval = (templ - ((unsigned)1<<31));
958
959 GETLONG(templ, cp);
960 longval = (templ - ((unsigned)1<<31));
961
962 GETLONG(templ, cp);
963 if (templ < referencealt) { /* below WGS 84 spheroid */
964 altval = referencealt - templ;
965 altsign = -1;
966 } else {
967 altval = templ - referencealt;
968 altsign = 1;
969 }
970
971 if (latval < 0) {
972 northsouth = 'S';
973 latval = -latval;
974 } else
975 northsouth = 'N';
976
977 latsecfrac = latval % 1000;
978 latval = latval / 1000;
979 latsec = latval % 60;
980 latval = latval / 60;
981 latmin = latval % 60;
982 latval = latval / 60;
983 latdeg = latval;
984
985 if (longval < 0) {
986 eastwest = 'W';
987 longval = -longval;
988 } else
989 eastwest = 'E';
990
991 longsecfrac = longval % 1000;
992 longval = longval / 1000;
993 longsec = longval % 60;
994 longval = longval / 60;
995 longmin = longval % 60;
996 longval = longval / 60;
997 longdeg = longval;
998
999 altfrac = altval % 100;
1000 altmeters = (altval / 100) * altsign;
1001
1002 if ((sizestr = strdup(precsize_ntoa(sizeval))) == NULL)
1003 sizestr = (char *) error;
1004 if ((hpstr = strdup(precsize_ntoa(hpval))) == NULL)
1005 hpstr = (char *) error;
1006 if ((vpstr = strdup(precsize_ntoa(vpval))) == NULL)
1007 vpstr = (char *) error;
1008
1009 sprintf(ascii,
1010 "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %d.%.2dm %sm %sm %sm",
1011 latdeg, latmin, latsec, latsecfrac, northsouth,
1012 longdeg, longmin, longsec, longsecfrac, eastwest,
1013 altmeters, altfrac, sizestr, hpstr, vpstr);
1014
1015 if (sizestr != (char *) error)
1016 free(sizestr);
1017 if (hpstr != (char *) error)
1018 free(hpstr);
1019 if (vpstr != (char *) error)
1020 free(vpstr);
1021
1022 return (ascii);
1023 }
1024 libresolv_hidden_def (loc_ntoa)
1025
1026
1027 /* Return the number of DNS hierarchy levels in the name. */
1028 int
1029 dn_count_labels(const char *name) {
1030 int i, len, count;
1031
1032 len = strlen(name);
1033 for (i = 0, count = 0; i < len; i++) {
1034 /* XXX need to check for \. or use named's nlabels(). */
1035 if (name[i] == '.')
1036 count++;
1037 }
1038
1039 /* don't count initial wildcard */
1040 if (name[0] == '*')
1041 if (count)
1042 count--;
1043
1044 /* don't count the null label for root. */
1045 /* if terminating '.' not found, must adjust */
1046 /* count to include last label */
1047 if (len > 0 && name[len-1] != '.')
1048 count++;
1049 return (count);
1050 }
1051 libresolv_hidden_def (__dn_count_labels)
1052
1053
1054 #if SHLIB_COMPAT (libresolv, GLIBC_2_0, GLIBC_2_27)
1055 /*
1056 * Make dates expressed in seconds-since-Jan-1-1970 easy to read.
1057 * SIG records are required to be printed like this, by the Secure DNS RFC.
1058 * This is an obsolescent function and does not handle dates outside the
1059 * signed 32-bit range.
1060 */
1061 char *
1062 __p_secstodate (u_long secs) {
1063 /* XXX nonreentrant */
1064 static char output[15]; /* YYYYMMDDHHMMSS and null */
1065 time_t clock = secs;
1066 struct tm *time;
1067
1068 struct tm timebuf;
1069 /* The call to __gmtime_r can never produce a year overflowing
1070 the range of int, given the check on SECS, but check for a
1071 NULL return anyway to avoid a null pointer dereference in
1072 case there are any other unspecified errors. */
1073 if (secs > 0x7fffffff
1074 || (time = __gmtime_r (&clock, &timebuf)) == NULL) {
1075 strcpy (output, "<overflow>");
1076 __set_errno (EOVERFLOW);
1077 return output;
1078 }
1079 time->tm_year += 1900;
1080 time->tm_mon += 1;
1081 /* The struct tm fields, given the above range check,
1082 must have values that mean this sprintf exactly fills the
1083 buffer. But as of GCC 8 of 2017-11-21, GCC cannot tell
1084 that, even given range checks on all fields with
1085 __builtin_unreachable called for out-of-range values. */
1086 DIAG_PUSH_NEEDS_COMMENT;
1087 # if __GNUC_PREREQ (7, 0)
1088 DIAG_IGNORE_NEEDS_COMMENT (8, "-Wformat-overflow=");
1089 # endif
1090 sprintf(output, "%04d%02d%02d%02d%02d%02d",
1091 time->tm_year, time->tm_mon, time->tm_mday,
1092 time->tm_hour, time->tm_min, time->tm_sec);
1093 DIAG_POP_NEEDS_COMMENT;
1094 return (output);
1095 }
1096 compat_symbol (libresolv, __p_secstodate, __p_secstodate, GLIBC_2_0);
1097 #endif