Annotation of src/lib/libc/resolv/res_debug.c, Revision 1.4
1.4 ! christos 1: /* $NetBSD: res_debug.c,v 1.3 2004/05/20 19:31:52 christos Exp $ */
1.1 christos 2:
3: /*
4: * Copyright (c) 1985
5: * The Regents of the University of California. All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by the University of
18: * California, Berkeley and its contributors.
19: * 4. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
36: /*
37: * Portions Copyright (c) 1993 by Digital Equipment Corporation.
38: *
39: * Permission to use, copy, modify, and distribute this software for any
40: * purpose with or without fee is hereby granted, provided that the above
41: * copyright notice and this permission notice appear in all copies, and that
42: * the name of Digital Equipment Corporation not be used in advertising or
43: * publicity pertaining to distribution of the document or software without
44: * specific, written prior permission.
45: *
46: * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
47: * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
48: * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
49: * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
50: * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
51: * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
52: * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
53: * SOFTWARE.
54: */
55:
56: /*
57: * Portions Copyright (c) 1995 by International Business Machines, Inc.
58: *
59: * International Business Machines, Inc. (hereinafter called IBM) grants
60: * permission under its copyrights to use, copy, modify, and distribute this
61: * Software with or without fee, provided that the above copyright notice and
62: * all paragraphs of this notice appear in all copies, and that the name of IBM
63: * not be used in connection with the marketing of any product incorporating
64: * the Software or modifications thereof, without specific, written prior
65: * permission.
66: *
67: * To the extent it has a right to do so, IBM grants an immunity from suit
68: * under its patents, if any, for the use, sale or manufacture of products to
69: * the extent that such products are used for performing Domain Name System
70: * dynamic updates in TCP/IP networks by means of the Software. No immunity is
71: * granted for any product per se or for any other function of any product.
72: *
73: * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES,
74: * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
75: * PARTICULAR PURPOSE. IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL,
76: * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING
77: * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN
78: * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES.
79: */
80:
81: /*
82: * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
83: * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
84: *
85: * Permission to use, copy, modify, and distribute this software for any
86: * purpose with or without fee is hereby granted, provided that the above
87: * copyright notice and this permission notice appear in all copies.
88: *
89: * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
90: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
91: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
92: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
93: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
94: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
95: * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
96: */
97:
1.4 ! christos 98: #include <sys/cdefs.h>
1.1 christos 99: #if defined(LIBC_SCCS) && !defined(lint)
1.4 ! christos 100: #ifdef notdef
1.1 christos 101: static const char sccsid[] = "@(#)res_debug.c 8.1 (Berkeley) 6/4/93";
102: static const char rcsid[] = "Id: res_debug.c,v 1.3.2.5.4.4 2004/04/13 06:53:20 marka Exp";
1.4 ! christos 103: #else
! 104: __RCSID("$NetBSD$");
! 105: #endif
1.1 christos 106: #endif /* LIBC_SCCS and not lint */
107:
108: #include "port_before.h"
109:
110: #include <sys/types.h>
111: #include <sys/param.h>
112: #include <sys/socket.h>
113:
114: #include <netinet/in.h>
115: #include <arpa/inet.h>
116: #include <arpa/nameser.h>
117:
118: #include <ctype.h>
119: #include <errno.h>
120: #include <math.h>
121: #include <netdb.h>
122: #include <resolv.h>
123: #include <stdio.h>
124: #include <stdlib.h>
125: #include <string.h>
126: #include <time.h>
127:
128: #include "port_after.h"
129:
130: #ifdef SPRINTF_CHAR
131: # define SPRINTF(x) strlen(sprintf/**/x)
132: #else
133: # define SPRINTF(x) sprintf x
134: #endif
135:
1.2 christos 136: static const char *precsize_ntoa(u_int32_t);
137:
1.1 christos 138: extern const char *_res_opcodes[];
139: extern const char *_res_sectioncodes[];
140:
141: /*
142: * Print the current options.
143: */
144: void
145: fp_resstat(const res_state statp, FILE *file) {
146: u_long mask;
147:
148: fprintf(file, ";; res options:");
149: for (mask = 1; mask != 0U; mask <<= 1)
150: if (statp->options & mask)
151: fprintf(file, " %s", p_option(mask));
152: putc('\n', file);
153: }
154:
155: static void
156: do_section(const res_state statp,
157: ns_msg *handle, ns_sect section,
158: int pflag, FILE *file)
159: {
160: int n, sflag, rrnum;
161: static int buflen = 2048;
162: char *buf;
163: ns_opcode opcode;
164: ns_rr rr;
165:
166: /*
167: * Print answer records.
168: */
169: sflag = (statp->pfcode & pflag);
170: if (statp->pfcode && !sflag)
171: return;
172:
1.2 christos 173: buf = malloc((size_t)buflen);
1.1 christos 174: if (buf == NULL) {
175: fprintf(file, ";; memory allocation failure\n");
176: return;
177: }
178:
179: opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode);
180: rrnum = 0;
181: for (;;) {
182: if (ns_parserr(handle, section, rrnum, &rr)) {
183: if (errno != ENODEV)
184: fprintf(file, ";; ns_parserr: %s\n",
185: strerror(errno));
186: else if (rrnum > 0 && sflag != 0 &&
187: (statp->pfcode & RES_PRF_HEAD1))
188: putc('\n', file);
189: goto cleanup;
190: }
191: if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1))
192: fprintf(file, ";; %s SECTION:\n",
193: p_section(section, opcode));
194: if (section == ns_s_qd)
195: fprintf(file, ";;\t%s, type = %s, class = %s\n",
196: ns_rr_name(rr),
197: p_type(ns_rr_type(rr)),
198: p_class(ns_rr_class(rr)));
199: else if (section == ns_s_ar && ns_rr_type(rr) == ns_t_opt) {
200: u_int32_t ttl = ns_rr_ttl(rr);
201: fprintf(file,
202: "; EDNS: version: %u, udp=%u, flags=%04x\n",
203: (ttl>>16)&0xff, ns_rr_class(rr), ttl&0xffff);
204: } else {
205: n = ns_sprintrr(handle, &rr, NULL, NULL,
1.2 christos 206: buf, (u_int)buflen);
1.1 christos 207: if (n < 0) {
208: if (errno == ENOSPC) {
209: free(buf);
210: buf = NULL;
211: if (buflen < 131072)
1.2 christos 212: buf = malloc((size_t)(buflen += 1024));
1.1 christos 213: if (buf == NULL) {
214: fprintf(file,
215: ";; memory allocation failure\n");
216: return;
217: }
218: continue;
219: }
220: fprintf(file, ";; ns_sprintrr: %s\n",
221: strerror(errno));
222: goto cleanup;
223: }
224: fputs(buf, file);
225: fputc('\n', file);
226: }
227: rrnum++;
228: }
229: cleanup:
230: if (buf != NULL)
231: free(buf);
232: }
233:
234: /*
235: * Print the contents of a query.
236: * This is intended to be primarily a debugging routine.
237: */
238: void
239: res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) {
240: ns_msg handle;
241: int qdcount, ancount, nscount, arcount;
242: u_int opcode, rcode, id;
243:
244: if (ns_initparse(msg, len, &handle) < 0) {
245: fprintf(file, ";; ns_initparse: %s\n", strerror(errno));
246: return;
247: }
248: opcode = ns_msg_getflag(handle, ns_f_opcode);
249: rcode = ns_msg_getflag(handle, ns_f_rcode);
250: id = ns_msg_id(handle);
251: qdcount = ns_msg_count(handle, ns_s_qd);
252: ancount = ns_msg_count(handle, ns_s_an);
253: nscount = ns_msg_count(handle, ns_s_ns);
254: arcount = ns_msg_count(handle, ns_s_ar);
255:
256: /*
257: * Print header fields.
258: */
259: if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode)
260: fprintf(file,
261: ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n",
1.2 christos 262: _res_opcodes[opcode], p_rcode((int)rcode), id);
1.1 christos 263: if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX))
264: putc(';', file);
265: if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) {
266: fprintf(file, "; flags:");
267: if (ns_msg_getflag(handle, ns_f_qr))
268: fprintf(file, " qr");
269: if (ns_msg_getflag(handle, ns_f_aa))
270: fprintf(file, " aa");
271: if (ns_msg_getflag(handle, ns_f_tc))
272: fprintf(file, " tc");
273: if (ns_msg_getflag(handle, ns_f_rd))
274: fprintf(file, " rd");
275: if (ns_msg_getflag(handle, ns_f_ra))
276: fprintf(file, " ra");
277: if (ns_msg_getflag(handle, ns_f_z))
278: fprintf(file, " ??");
279: if (ns_msg_getflag(handle, ns_f_ad))
280: fprintf(file, " ad");
281: if (ns_msg_getflag(handle, ns_f_cd))
282: fprintf(file, " cd");
283: }
284: if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) {
285: fprintf(file, "; %s: %d",
1.2 christos 286: p_section(ns_s_qd, (int)opcode), qdcount);
1.1 christos 287: fprintf(file, ", %s: %d",
1.2 christos 288: p_section(ns_s_an, (int)opcode), ancount);
1.1 christos 289: fprintf(file, ", %s: %d",
1.2 christos 290: p_section(ns_s_ns, (int)opcode), nscount);
1.1 christos 291: fprintf(file, ", %s: %d",
1.2 christos 292: p_section(ns_s_ar, (int)opcode), arcount);
1.1 christos 293: }
294: if ((!statp->pfcode) || (statp->pfcode &
295: (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) {
296: putc('\n',file);
297: }
298: /*
299: * Print the various sections.
300: */
301: do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file);
302: do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file);
303: do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file);
304: do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file);
305: if (qdcount == 0 && ancount == 0 &&
306: nscount == 0 && arcount == 0)
307: putc('\n', file);
308: }
309:
310: const u_char *
311: p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) {
312: char name[MAXDNAME];
313: int n;
314:
315: if ((n = dn_expand(msg, msg + len, cp, name, sizeof name)) < 0)
316: return (NULL);
317: if (name[0] == '\0')
318: putc('.', file);
319: else
320: fputs(name, file);
321: return (cp + n);
322: }
323:
324: const u_char *
325: p_cdname(const u_char *cp, const u_char *msg, FILE *file) {
326: return (p_cdnname(cp, msg, PACKETSZ, file));
327: }
328:
329: /* Return a fully-qualified domain name from a compressed name (with
330: length supplied). */
331:
332: const u_char *
333: p_fqnname(cp, msg, msglen, name, namelen)
334: const u_char *cp, *msg;
335: int msglen;
336: char *name;
337: int namelen;
338: {
339: int n, newlen;
340:
341: if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0)
342: return (NULL);
343: newlen = strlen(name);
344: if (newlen == 0 || name[newlen - 1] != '.') {
345: if (newlen + 1 >= namelen) /* Lack space for final dot */
346: return (NULL);
347: else
348: strcpy(name + newlen, ".");
349: }
350: return (cp + n);
351: }
352:
353: /* XXX: the rest of these functions need to become length-limited, too. */
354:
355: const u_char *
356: p_fqname(const u_char *cp, const u_char *msg, FILE *file) {
357: char name[MAXDNAME];
358: const u_char *n;
359:
360: n = p_fqnname(cp, msg, MAXCDNAME, name, sizeof name);
361: if (n == NULL)
362: return (NULL);
363: fputs(name, file);
364: return (n);
365: }
366:
367: /*
368: * Names of RR classes and qclasses. Classes and qclasses are the same, except
369: * that C_ANY is a qclass but not a class. (You can ask for records of class
370: * C_ANY, but you can't have any records of that class in the database.)
371: */
372: const struct res_sym __p_class_syms[] = {
373: {C_IN, "IN", (char *)0},
374: {C_CHAOS, "CH", (char *)0},
375: {C_CHAOS, "CHAOS", (char *)0},
376: {C_HS, "HS", (char *)0},
377: {C_HS, "HESIOD", (char *)0},
378: {C_ANY, "ANY", (char *)0},
379: {C_NONE, "NONE", (char *)0},
380: {C_IN, (char *)0, (char *)0}
381: };
382:
383: /*
384: * Names of message sections.
385: */
386: const struct res_sym __p_default_section_syms[] = {
387: {ns_s_qd, "QUERY", (char *)0},
388: {ns_s_an, "ANSWER", (char *)0},
389: {ns_s_ns, "AUTHORITY", (char *)0},
390: {ns_s_ar, "ADDITIONAL", (char *)0},
391: {0, (char *)0, (char *)0}
392: };
393:
394: const struct res_sym __p_update_section_syms[] = {
395: {S_ZONE, "ZONE", (char *)0},
396: {S_PREREQ, "PREREQUISITE", (char *)0},
397: {S_UPDATE, "UPDATE", (char *)0},
398: {S_ADDT, "ADDITIONAL", (char *)0},
399: {0, (char *)0, (char *)0}
400: };
401:
402: const struct res_sym __p_key_syms[] = {
403: {NS_ALG_MD5RSA, "RSA", "RSA KEY with MD5 hash"},
404: {NS_ALG_DH, "DH", "Diffie Hellman"},
405: {NS_ALG_DSA, "DSA", "Digital Signature Algorithm"},
406: {NS_ALG_EXPIRE_ONLY, "EXPIREONLY", "No algorithm"},
407: {NS_ALG_PRIVATE_OID, "PRIVATE", "Algorithm obtained from OID"},
408: {0, NULL, NULL}
409: };
410:
411: const struct res_sym __p_cert_syms[] = {
412: {cert_t_pkix, "PKIX", "PKIX (X.509v3) Certificate"},
413: {cert_t_spki, "SPKI", "SPKI certificate"},
414: {cert_t_pgp, "PGP", "PGP certificate"},
415: {cert_t_url, "URL", "URL Private"},
416: {cert_t_oid, "OID", "OID Private"},
417: {0, NULL, NULL}
418: };
419:
420: /*
421: * Names of RR types and qtypes. Types and qtypes are the same, except
422: * that T_ANY is a qtype but not a type. (You can ask for records of type
423: * T_ANY, but you can't have any records of that type in the database.)
424: */
425: const struct res_sym __p_type_syms[] = {
426: {ns_t_a, "A", "address"},
427: {ns_t_ns, "NS", "name server"},
428: {ns_t_md, "MD", "mail destination (deprecated)"},
429: {ns_t_mf, "MF", "mail forwarder (deprecated)"},
430: {ns_t_cname, "CNAME", "canonical name"},
431: {ns_t_soa, "SOA", "start of authority"},
432: {ns_t_mb, "MB", "mailbox"},
433: {ns_t_mg, "MG", "mail group member"},
434: {ns_t_mr, "MR", "mail rename"},
435: {ns_t_null, "NULL", "null"},
436: {ns_t_wks, "WKS", "well-known service (deprecated)"},
437: {ns_t_ptr, "PTR", "domain name pointer"},
438: {ns_t_hinfo, "HINFO", "host information"},
439: {ns_t_minfo, "MINFO", "mailbox information"},
440: {ns_t_mx, "MX", "mail exchanger"},
441: {ns_t_txt, "TXT", "text"},
442: {ns_t_rp, "RP", "responsible person"},
443: {ns_t_afsdb, "AFSDB", "DCE or AFS server"},
444: {ns_t_x25, "X25", "X25 address"},
445: {ns_t_isdn, "ISDN", "ISDN address"},
446: {ns_t_rt, "RT", "router"},
447: {ns_t_nsap, "NSAP", "nsap address"},
448: {ns_t_nsap_ptr, "NSAP_PTR", "domain name pointer"},
449: {ns_t_sig, "SIG", "signature"},
450: {ns_t_key, "KEY", "key"},
451: {ns_t_px, "PX", "mapping information"},
452: {ns_t_gpos, "GPOS", "geographical position (withdrawn)"},
453: {ns_t_aaaa, "AAAA", "IPv6 address"},
454: {ns_t_loc, "LOC", "location"},
455: {ns_t_nxt, "NXT", "next valid name (unimplemented)"},
456: {ns_t_eid, "EID", "endpoint identifier (unimplemented)"},
457: {ns_t_nimloc, "NIMLOC", "NIMROD locator (unimplemented)"},
458: {ns_t_srv, "SRV", "server selection"},
459: {ns_t_atma, "ATMA", "ATM address (unimplemented)"},
460: {ns_t_tkey, "TKEY", "tkey"},
461: {ns_t_tsig, "TSIG", "transaction signature"},
462: {ns_t_ixfr, "IXFR", "incremental zone transfer"},
463: {ns_t_axfr, "AXFR", "zone transfer"},
464: {ns_t_zxfr, "ZXFR", "compressed zone transfer"},
465: {ns_t_mailb, "MAILB", "mailbox-related data (deprecated)"},
466: {ns_t_maila, "MAILA", "mail agent (deprecated)"},
467: {ns_t_naptr, "NAPTR", "URN Naming Authority"},
468: {ns_t_kx, "KX", "Key Exchange"},
469: {ns_t_cert, "CERT", "Certificate"},
470: {ns_t_a6, "A6", "IPv6 Address"},
471: {ns_t_dname, "DNAME", "dname"},
472: {ns_t_sink, "SINK", "Kitchen Sink (experimental)"},
473: {ns_t_opt, "OPT", "EDNS Options"},
474: {ns_t_any, "ANY", "\"any\""},
475: {0, NULL, NULL}
476: };
477:
478: /*
479: * Names of DNS rcodes.
480: */
481: const struct res_sym __p_rcode_syms[] = {
482: {ns_r_noerror, "NOERROR", "no error"},
483: {ns_r_formerr, "FORMERR", "format error"},
484: {ns_r_servfail, "SERVFAIL", "server failed"},
485: {ns_r_nxdomain, "NXDOMAIN", "no such domain name"},
486: {ns_r_notimpl, "NOTIMP", "not implemented"},
487: {ns_r_refused, "REFUSED", "refused"},
488: {ns_r_yxdomain, "YXDOMAIN", "domain name exists"},
489: {ns_r_yxrrset, "YXRRSET", "rrset exists"},
490: {ns_r_nxrrset, "NXRRSET", "rrset doesn't exist"},
491: {ns_r_notauth, "NOTAUTH", "not authoritative"},
492: {ns_r_notzone, "NOTZONE", "Not in zone"},
493: {ns_r_max, "", ""},
494: {ns_r_badsig, "BADSIG", "bad signature"},
495: {ns_r_badkey, "BADKEY", "bad key"},
496: {ns_r_badtime, "BADTIME", "bad time"},
497: {0, NULL, NULL}
498: };
499:
500: int
501: sym_ston(const struct res_sym *syms, const char *name, int *success) {
1.3 christos 502: for (; syms->name != 0; syms++) {
1.1 christos 503: if (strcasecmp (name, syms->name) == 0) {
504: if (success)
505: *success = 1;
506: return (syms->number);
507: }
508: }
509: if (success)
510: *success = 0;
511: return (syms->number); /* The default value. */
512: }
513:
514: const char *
515: sym_ntos(const struct res_sym *syms, int number, int *success) {
516: static char unname[20];
517:
1.2 christos 518: for (; syms->name != 0; syms++) {
1.1 christos 519: if (number == syms->number) {
520: if (success)
521: *success = 1;
522: return (syms->name);
523: }
524: }
525:
526: sprintf(unname, "%d", number); /* XXX nonreentrant */
527: if (success)
528: *success = 0;
529: return (unname);
530: }
531:
532: const char *
533: sym_ntop(const struct res_sym *syms, int number, int *success) {
534: static char unname[20];
535:
1.2 christos 536: for (; syms->name != 0; syms++) {
1.1 christos 537: if (number == syms->number) {
538: if (success)
539: *success = 1;
540: return (syms->humanname);
541: }
542: }
543: sprintf(unname, "%d", number); /* XXX nonreentrant */
544: if (success)
545: *success = 0;
546: return (unname);
547: }
548:
549: /*
550: * Return a string for the type.
551: */
552: const char *
553: p_type(int type) {
554: int success;
555: const char *result;
556: static char typebuf[20];
557:
558: result = sym_ntos(__p_type_syms, type, &success);
559: if (success)
560: return (result);
561: if (type < 0 || type > 0xfff)
562: return ("BADTYPE");
563: sprintf(typebuf, "TYPE%d", type);
564: return (typebuf);
565: }
566:
567: /*
568: * Return a string for the type.
569: */
570: const char *
571: p_section(int section, int opcode) {
572: const struct res_sym *symbols;
573:
574: switch (opcode) {
575: case ns_o_update:
576: symbols = __p_update_section_syms;
577: break;
578: default:
579: symbols = __p_default_section_syms;
580: break;
581: }
582: return (sym_ntos(symbols, section, (int *)0));
583: }
584:
585: /*
586: * Return a mnemonic for class.
587: */
588: const char *
589: p_class(int class) {
590: int success;
591: const char *result;
592: static char classbuf[20];
593:
594: result = sym_ntos(__p_class_syms, class, &success);
595: if (success)
596: return (result);
597: if (class < 0 || class > 0xfff)
598: return ("BADCLASS");
599: sprintf(classbuf, "CLASS%d", class);
600: return (classbuf);
601: }
602:
603: /*
604: * Return a mnemonic for an option
605: */
606: const char *
607: p_option(u_long option) {
608: static char nbuf[40];
609:
610: switch (option) {
611: case RES_INIT: return "init";
612: case RES_DEBUG: return "debug";
613: case RES_AAONLY: return "aaonly(unimpl)";
614: case RES_USEVC: return "usevc";
615: case RES_PRIMARY: return "primry(unimpl)";
616: case RES_IGNTC: return "igntc";
617: case RES_RECURSE: return "recurs";
618: case RES_DEFNAMES: return "defnam";
619: case RES_STAYOPEN: return "styopn";
620: case RES_DNSRCH: return "dnsrch";
621: case RES_INSECURE1: return "insecure1";
622: case RES_INSECURE2: return "insecure2";
623: case RES_NOALIASES: return "noaliases";
624: case RES_USE_INET6: return "inet6";
625: #ifdef RES_USE_EDNS0 /* KAME extension */
626: case RES_USE_EDNS0: return "edns0";
627: #endif
628: #ifdef RES_USE_DNAME
629: case RES_USE_DNAME: return "dname";
630: #endif
631: #ifdef RES_USE_DNSSEC
632: case RES_USE_DNSSEC: return "dnssec";
633: #endif
634: #ifdef RES_NOTLDQUERY
635: case RES_NOTLDQUERY: return "no-tld-query";
636: #endif
637: #ifdef RES_NO_NIBBLE2
638: case RES_NO_NIBBLE2: return "no-nibble2";
639: #endif
640: /* XXX nonreentrant */
641: default: sprintf(nbuf, "?0x%lx?", (u_long)option);
642: return (nbuf);
643: }
644: }
645:
646: /*
647: * Return a mnemonic for a time to live.
648: */
649: const char *
650: p_time(u_int32_t value) {
651: static char nbuf[40]; /* XXX nonreentrant */
652:
1.2 christos 653: if (ns_format_ttl((u_long)value, nbuf, sizeof nbuf) < 0)
1.1 christos 654: sprintf(nbuf, "%u", value);
655: return (nbuf);
656: }
657:
658: /*
659: * Return a string for the rcode.
660: */
661: const char *
662: p_rcode(int rcode) {
663: return (sym_ntos(__p_rcode_syms, rcode, (int *)0));
664: }
665:
666: /*
667: * Return a string for a res_sockaddr_union.
668: */
669: const char *
670: p_sockun(union res_sockaddr_union u, char *buf, size_t size) {
671: char ret[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:123.123.123.123"];
672:
673: switch (u.sin.sin_family) {
674: case AF_INET:
675: inet_ntop(AF_INET, &u.sin.sin_addr, ret, sizeof ret);
676: break;
677: #ifdef HAS_INET6_STRUCTS
678: case AF_INET6:
679: inet_ntop(AF_INET6, &u.sin6.sin6_addr, ret, sizeof ret);
680: break;
681: #endif
682: default:
683: sprintf(ret, "[af%d]", u.sin.sin_family);
684: break;
685: }
686: if (size > 0U) {
687: strncpy(buf, ret, size - 1);
688: buf[size - 1] = '0';
689: }
690: return (buf);
691: }
692:
693: /*
694: * routines to convert between on-the-wire RR format and zone file format.
695: * Does not contain conversion to/from decimal degrees; divide or multiply
696: * by 60*60*1000 for that.
697: */
698:
699: static unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000,
700: 1000000,10000000,100000000,1000000000};
701:
702: /* takes an XeY precision/size value, returns a string representation. */
703: static const char *
704: precsize_ntoa(prec)
1.3 christos 705: u_int32_t prec;
1.1 christos 706: {
707: static char retbuf[sizeof "90000000.00"]; /* XXX nonreentrant */
708: unsigned long val;
709: int mantissa, exponent;
710:
711: mantissa = (int)((prec >> 4) & 0x0f) % 10;
712: exponent = (int)((prec >> 0) & 0x0f) % 10;
713:
714: val = mantissa * poweroften[exponent];
715:
716: (void) sprintf(retbuf, "%lu.%.2lu", val/100, val%100);
717: return (retbuf);
718: }
719:
720: /* converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */
721: static u_int8_t
722: precsize_aton(const char **strptr) {
723: unsigned int mval = 0, cmval = 0;
724: u_int8_t retval = 0;
725: const char *cp;
726: int exponent;
727: int mantissa;
728:
729: cp = *strptr;
730:
731: while (isdigit((unsigned char)*cp))
732: mval = mval * 10 + (*cp++ - '0');
733:
734: if (*cp == '.') { /* centimeters */
735: cp++;
736: if (isdigit((unsigned char)*cp)) {
737: cmval = (*cp++ - '0') * 10;
738: if (isdigit((unsigned char)*cp)) {
739: cmval += (*cp++ - '0');
740: }
741: }
742: }
743: cmval = (mval * 100) + cmval;
744:
745: for (exponent = 0; exponent < 9; exponent++)
746: if (cmval < poweroften[exponent+1])
747: break;
748:
749: mantissa = cmval / poweroften[exponent];
750: if (mantissa > 9)
751: mantissa = 9;
752:
753: retval = (mantissa << 4) | exponent;
754:
755: *strptr = cp;
756:
757: return (retval);
758: }
759:
760: /* converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */
761: static u_int32_t
762: latlon2ul(const char **latlonstrptr, int *which) {
763: const char *cp;
764: u_int32_t retval;
765: int deg = 0, min = 0, secs = 0, secsfrac = 0;
766:
767: cp = *latlonstrptr;
768:
769: while (isdigit((unsigned char)*cp))
770: deg = deg * 10 + (*cp++ - '0');
771:
772: while (isspace((unsigned char)*cp))
773: cp++;
774:
775: if (!(isdigit((unsigned char)*cp)))
776: goto fndhemi;
777:
778: while (isdigit((unsigned char)*cp))
779: min = min * 10 + (*cp++ - '0');
780:
781: while (isspace((unsigned char)*cp))
782: cp++;
783:
784: if (!(isdigit((unsigned char)*cp)))
785: goto fndhemi;
786:
787: while (isdigit((unsigned char)*cp))
788: secs = secs * 10 + (*cp++ - '0');
789:
790: if (*cp == '.') { /* decimal seconds */
791: cp++;
792: if (isdigit((unsigned char)*cp)) {
793: secsfrac = (*cp++ - '0') * 100;
794: if (isdigit((unsigned char)*cp)) {
795: secsfrac += (*cp++ - '0') * 10;
796: if (isdigit((unsigned char)*cp)) {
797: secsfrac += (*cp++ - '0');
798: }
799: }
800: }
801: }
802:
803: while (!isspace((unsigned char)*cp)) /* if any trailing garbage */
804: cp++;
805:
806: while (isspace((unsigned char)*cp))
807: cp++;
808:
809: fndhemi:
810: switch (*cp) {
811: case 'N': case 'n':
812: case 'E': case 'e':
813: retval = ((unsigned)1<<31)
814: + (((((deg * 60) + min) * 60) + secs) * 1000)
815: + secsfrac;
816: break;
817: case 'S': case 's':
818: case 'W': case 'w':
819: retval = ((unsigned)1<<31)
820: - (((((deg * 60) + min) * 60) + secs) * 1000)
821: - secsfrac;
822: break;
823: default:
824: retval = 0; /* invalid value -- indicates error */
825: break;
826: }
827:
828: switch (*cp) {
829: case 'N': case 'n':
830: case 'S': case 's':
831: *which = 1; /* latitude */
832: break;
833: case 'E': case 'e':
834: case 'W': case 'w':
835: *which = 2; /* longitude */
836: break;
837: default:
838: *which = 0; /* error */
839: break;
840: }
841:
842: cp++; /* skip the hemisphere */
843:
844: while (!isspace((unsigned char)*cp)) /* if any trailing garbage */
845: cp++;
846:
847: while (isspace((unsigned char)*cp)) /* move to next field */
848: cp++;
849:
850: *latlonstrptr = cp;
851:
852: return (retval);
853: }
854:
855: /* converts a zone file representation in a string to an RDATA on-the-wire
856: * representation. */
857: int
858: loc_aton(ascii, binary)
859: const char *ascii;
860: u_char *binary;
861: {
862: const char *cp, *maxcp;
863: u_char *bcp;
864:
865: u_int32_t latit = 0, longit = 0, alt = 0;
866: u_int32_t lltemp1 = 0, lltemp2 = 0;
867: int altmeters = 0, altfrac = 0, altsign = 1;
868: u_int8_t hp = 0x16; /* default = 1e6 cm = 10000.00m = 10km */
869: u_int8_t vp = 0x13; /* default = 1e3 cm = 10.00m */
870: u_int8_t siz = 0x12; /* default = 1e2 cm = 1.00m */
871: int which1 = 0, which2 = 0;
872:
873: cp = ascii;
874: maxcp = cp + strlen(ascii);
875:
876: lltemp1 = latlon2ul(&cp, &which1);
877:
878: lltemp2 = latlon2ul(&cp, &which2);
879:
880: switch (which1 + which2) {
881: case 3: /* 1 + 2, the only valid combination */
882: if ((which1 == 1) && (which2 == 2)) { /* normal case */
883: latit = lltemp1;
884: longit = lltemp2;
885: } else if ((which1 == 2) && (which2 == 1)) { /* reversed */
886: longit = lltemp1;
887: latit = lltemp2;
888: } else { /* some kind of brokenness */
889: return (0);
890: }
891: break;
892: default: /* we didn't get one of each */
893: return (0);
894: }
895:
896: /* altitude */
897: if (*cp == '-') {
898: altsign = -1;
899: cp++;
900: }
901:
902: if (*cp == '+')
903: cp++;
904:
905: while (isdigit((unsigned char)*cp))
906: altmeters = altmeters * 10 + (*cp++ - '0');
907:
908: if (*cp == '.') { /* decimal meters */
909: cp++;
910: if (isdigit((unsigned char)*cp)) {
911: altfrac = (*cp++ - '0') * 10;
912: if (isdigit((unsigned char)*cp)) {
913: altfrac += (*cp++ - '0');
914: }
915: }
916: }
917:
918: alt = (10000000 + (altsign * (altmeters * 100 + altfrac)));
919:
920: while (!isspace((unsigned char)*cp) && (cp < maxcp)) /* if trailing garbage or m */
921: cp++;
922:
923: while (isspace((unsigned char)*cp) && (cp < maxcp))
924: cp++;
925:
926: if (cp >= maxcp)
927: goto defaults;
928:
929: siz = precsize_aton(&cp);
930:
931: while (!isspace((unsigned char)*cp) && (cp < maxcp)) /* if trailing garbage or m */
932: cp++;
933:
934: while (isspace((unsigned char)*cp) && (cp < maxcp))
935: cp++;
936:
937: if (cp >= maxcp)
938: goto defaults;
939:
940: hp = precsize_aton(&cp);
941:
942: while (!isspace((unsigned char)*cp) && (cp < maxcp)) /* if trailing garbage or m */
943: cp++;
944:
945: while (isspace((unsigned char)*cp) && (cp < maxcp))
946: cp++;
947:
948: if (cp >= maxcp)
949: goto defaults;
950:
951: vp = precsize_aton(&cp);
952:
953: defaults:
954:
955: bcp = binary;
956: *bcp++ = (u_int8_t) 0; /* version byte */
957: *bcp++ = siz;
958: *bcp++ = hp;
959: *bcp++ = vp;
960: PUTLONG(latit,bcp);
961: PUTLONG(longit,bcp);
962: PUTLONG(alt,bcp);
963:
964: return (16); /* size of RR in octets */
965: }
966:
967: /* takes an on-the-wire LOC RR and formats it in a human readable format. */
968: const char *
969: loc_ntoa(binary, ascii)
970: const u_char *binary;
971: char *ascii;
972: {
973: static const char *error = "?";
974: static char tmpbuf[sizeof
975: "1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"];
976: const u_char *cp = binary;
977:
978: int latdeg, latmin, latsec, latsecfrac;
979: int longdeg, longmin, longsec, longsecfrac;
980: char northsouth, eastwest;
981: const char *altsign;
982: int altmeters, altfrac;
983:
984: const u_int32_t referencealt = 100000 * 100;
985:
986: int32_t latval, longval, altval;
987: u_int32_t templ;
988: u_int8_t sizeval, hpval, vpval, versionval;
989:
990: char *sizestr, *hpstr, *vpstr;
991:
992: versionval = *cp++;
993:
994: if (ascii == NULL)
995: ascii = tmpbuf;
996:
997: if (versionval) {
998: (void) sprintf(ascii, "; error: unknown LOC RR version");
999: return (ascii);
1000: }
1001:
1002: sizeval = *cp++;
1003:
1004: hpval = *cp++;
1005: vpval = *cp++;
1006:
1007: GETLONG(templ, cp);
1008: latval = (templ - ((unsigned)1<<31));
1009:
1010: GETLONG(templ, cp);
1011: longval = (templ - ((unsigned)1<<31));
1012:
1013: GETLONG(templ, cp);
1014: if (templ < referencealt) { /* below WGS 84 spheroid */
1015: altval = referencealt - templ;
1016: altsign = "-";
1017: } else {
1018: altval = templ - referencealt;
1019: altsign = "";
1020: }
1021:
1022: if (latval < 0) {
1023: northsouth = 'S';
1024: latval = -latval;
1025: } else
1026: northsouth = 'N';
1027:
1028: latsecfrac = latval % 1000;
1029: latval = latval / 1000;
1030: latsec = latval % 60;
1031: latval = latval / 60;
1032: latmin = latval % 60;
1033: latval = latval / 60;
1034: latdeg = latval;
1035:
1036: if (longval < 0) {
1037: eastwest = 'W';
1038: longval = -longval;
1039: } else
1040: eastwest = 'E';
1041:
1042: longsecfrac = longval % 1000;
1043: longval = longval / 1000;
1044: longsec = longval % 60;
1045: longval = longval / 60;
1046: longmin = longval % 60;
1047: longval = longval / 60;
1048: longdeg = longval;
1049:
1050: altfrac = altval % 100;
1051: altmeters = (altval / 100);
1052:
1.2 christos 1053: sizestr = strdup(precsize_ntoa((u_int32_t)sizeval));
1054: hpstr = strdup(precsize_ntoa((u_int32_t)hpval));
1055: vpstr = strdup(precsize_ntoa((u_int32_t)vpval));
1.1 christos 1056:
1057: sprintf(ascii,
1058: "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm",
1059: latdeg, latmin, latsec, latsecfrac, northsouth,
1060: longdeg, longmin, longsec, longsecfrac, eastwest,
1061: altsign, altmeters, altfrac,
1062: (sizestr != NULL) ? sizestr : error,
1063: (hpstr != NULL) ? hpstr : error,
1064: (vpstr != NULL) ? vpstr : error);
1065:
1066: if (sizestr != NULL)
1067: free(sizestr);
1068: if (hpstr != NULL)
1069: free(hpstr);
1070: if (vpstr != NULL)
1071: free(vpstr);
1072:
1073: return (ascii);
1074: }
1075:
1076:
1077: /* Return the number of DNS hierarchy levels in the name. */
1078: int
1079: dn_count_labels(const char *name) {
1080: int i, len, count;
1081:
1082: len = strlen(name);
1083: for (i = 0, count = 0; i < len; i++) {
1084: /* XXX need to check for \. or use named's nlabels(). */
1085: if (name[i] == '.')
1086: count++;
1087: }
1088:
1089: /* don't count initial wildcard */
1090: if (name[0] == '*')
1091: if (count)
1092: count--;
1093:
1094: /* don't count the null label for root. */
1095: /* if terminating '.' not found, must adjust */
1096: /* count to include last label */
1097: if (len > 0 && name[len-1] != '.')
1098: count++;
1099: return (count);
1100: }
1101:
1102:
1103: /*
1104: * Make dates expressed in seconds-since-Jan-1-1970 easy to read.
1105: * SIG records are required to be printed like this, by the Secure DNS RFC.
1106: */
1107: char *
1108: p_secstodate (u_long secs) {
1109: /* XXX nonreentrant */
1110: static char output[15]; /* YYYYMMDDHHMMSS and null */
1.2 christos 1111: time_t myclock = secs;
1112: struct tm *mytime;
1.1 christos 1113: #ifdef HAVE_TIME_R
1114: struct tm res;
1115:
1.2 christos 1116: mytime = gmtime_r(&myclock, &res);
1.1 christos 1117: #else
1.2 christos 1118: mytime = gmtime(&myclock);
1.1 christos 1119: #endif
1.2 christos 1120: mytime->tm_year += 1900;
1121: mytime->tm_mon += 1;
1.1 christos 1122: sprintf(output, "%04d%02d%02d%02d%02d%02d",
1.2 christos 1123: mytime->tm_year, mytime->tm_mon, mytime->tm_mday,
1124: mytime->tm_hour, mytime->tm_min, mytime->tm_sec);
1.1 christos 1125: return (output);
1126: }
1127:
1128: u_int16_t
1129: res_nametoclass(const char *buf, int *successp) {
1130: unsigned long result;
1131: char *endptr;
1132: int success;
1133:
1134: result = sym_ston(__p_class_syms, buf, &success);
1135: if (success)
1136: goto done;
1137:
1138: if (strncasecmp(buf, "CLASS", 5) != 0 ||
1139: !isdigit((unsigned char)buf[5]))
1140: goto done;
1141: errno = 0;
1142: result = strtoul(buf + 5, &endptr, 10);
1143: if (errno == 0 && *endptr == '\0' && result <= 0xffffU)
1144: success = 1;
1145: done:
1146: if (successp)
1147: *successp = success;
1.2 christos 1148: return (u_int16_t)(result);
1.1 christos 1149: }
1150:
1151: u_int16_t
1152: res_nametotype(const char *buf, int *successp) {
1153: unsigned long result;
1154: char *endptr;
1155: int success;
1156:
1157: result = sym_ston(__p_type_syms, buf, &success);
1158: if (success)
1159: goto done;
1160:
1161: if (strncasecmp(buf, "type", 4) != 0 ||
1162: !isdigit((unsigned char)buf[4]))
1163: goto done;
1164: errno = 0;
1165: result = strtoul(buf + 4, &endptr, 10);
1166: if (errno == 0 && *endptr == '\0' && result <= 0xffffU)
1167: success = 1;
1168: done:
1169: if (successp)
1170: *successp = success;
1.2 christos 1171: return (u_int16_t)(result);
1.1 christos 1172: }
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