Annotation of src/lib/libc/resolv/res_debug.c, Revision 1.9
1.9 ! ghen 1: /* $NetBSD: res_debug.c,v 1.1.1.4 2007/03/30 20:16:21 ghen 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";
1.8 christos 102: static const char rcsid[] = "Id: res_debug.c,v 1.10.18.5 2005/07/28 07:38:11 marka Exp";
1.4 christos 103: #else
1.9 ! ghen 104: __RCSID("$NetBSD: res_debug.c,v 1.8 2007/01/27 22:26:44 christos Exp $");
1.4 christos 105: #endif
1.1 christos 106: #endif /* LIBC_SCCS and not lint */
107:
108: #include "port_before.h"
109:
1.5 christos 110: #include "namespace.h"
1.1 christos 111: #include <sys/types.h>
112: #include <sys/param.h>
113: #include <sys/socket.h>
114:
115: #include <netinet/in.h>
116: #include <arpa/inet.h>
117: #include <arpa/nameser.h>
118:
119: #include <ctype.h>
120: #include <errno.h>
121: #include <math.h>
122: #include <netdb.h>
123: #include <resolv.h>
1.8 christos 124: #include <resolv_mt.h>
1.1 christos 125: #include <stdio.h>
126: #include <stdlib.h>
127: #include <string.h>
128: #include <time.h>
129:
130: #include "port_after.h"
131:
132: #ifdef SPRINTF_CHAR
133: # define SPRINTF(x) strlen(sprintf/**/x)
134: #else
135: # define SPRINTF(x) sprintf x
136: #endif
137:
1.2 christos 138: static const char *precsize_ntoa(u_int32_t);
139:
1.1 christos 140: extern const char *_res_opcodes[];
141: extern const char *_res_sectioncodes[];
142:
1.6 christos 143: #if 0
1.5 christos 144: #ifdef __weak_alias
145: __weak_alias(res_pquery,__res_pquery)
146: __weak_alias(res_nametoclass,__res_nametoclass)
147: __weak_alias(res_nametotype,__res_nametotype)
148: #endif
1.6 christos 149: #endif
1.5 christos 150:
151: #ifndef _LIBC
1.8 christos 152: /*%
1.1 christos 153: * Print the current options.
154: */
155: void
156: fp_resstat(const res_state statp, FILE *file) {
157: u_long mask;
158:
159: fprintf(file, ";; res options:");
160: for (mask = 1; mask != 0U; mask <<= 1)
161: if (statp->options & mask)
162: fprintf(file, " %s", p_option(mask));
163: putc('\n', file);
164: }
1.5 christos 165: #endif
1.1 christos 166:
167: static void
168: do_section(const res_state statp,
169: ns_msg *handle, ns_sect section,
170: int pflag, FILE *file)
171: {
172: int n, sflag, rrnum;
173: static int buflen = 2048;
174: char *buf;
175: ns_opcode opcode;
176: ns_rr rr;
177:
178: /*
179: * Print answer records.
180: */
181: sflag = (statp->pfcode & pflag);
182: if (statp->pfcode && !sflag)
183: return;
184:
1.2 christos 185: buf = malloc((size_t)buflen);
1.1 christos 186: if (buf == NULL) {
187: fprintf(file, ";; memory allocation failure\n");
188: return;
189: }
190:
191: opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode);
192: rrnum = 0;
193: for (;;) {
194: if (ns_parserr(handle, section, rrnum, &rr)) {
195: if (errno != ENODEV)
196: fprintf(file, ";; ns_parserr: %s\n",
197: strerror(errno));
198: else if (rrnum > 0 && sflag != 0 &&
199: (statp->pfcode & RES_PRF_HEAD1))
200: putc('\n', file);
201: goto cleanup;
202: }
203: if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1))
204: fprintf(file, ";; %s SECTION:\n",
205: p_section(section, opcode));
206: if (section == ns_s_qd)
207: fprintf(file, ";;\t%s, type = %s, class = %s\n",
208: ns_rr_name(rr),
209: p_type(ns_rr_type(rr)),
210: p_class(ns_rr_class(rr)));
211: else if (section == ns_s_ar && ns_rr_type(rr) == ns_t_opt) {
212: u_int32_t ttl = ns_rr_ttl(rr);
213: fprintf(file,
214: "; EDNS: version: %u, udp=%u, flags=%04x\n",
215: (ttl>>16)&0xff, ns_rr_class(rr), ttl&0xffff);
216: } else {
217: n = ns_sprintrr(handle, &rr, NULL, NULL,
1.2 christos 218: buf, (u_int)buflen);
1.1 christos 219: if (n < 0) {
220: if (errno == ENOSPC) {
221: free(buf);
222: buf = NULL;
223: if (buflen < 131072)
1.2 christos 224: buf = malloc((size_t)(buflen += 1024));
1.1 christos 225: if (buf == NULL) {
226: fprintf(file,
227: ";; memory allocation failure\n");
228: return;
229: }
230: continue;
231: }
232: fprintf(file, ";; ns_sprintrr: %s\n",
233: strerror(errno));
234: goto cleanup;
235: }
236: fputs(buf, file);
237: fputc('\n', file);
238: }
239: rrnum++;
240: }
241: cleanup:
242: if (buf != NULL)
243: free(buf);
244: }
245:
1.8 christos 246: /*%
1.1 christos 247: * Print the contents of a query.
248: * This is intended to be primarily a debugging routine.
249: */
250: void
251: res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) {
252: ns_msg handle;
253: int qdcount, ancount, nscount, arcount;
254: u_int opcode, rcode, id;
255:
256: if (ns_initparse(msg, len, &handle) < 0) {
257: fprintf(file, ";; ns_initparse: %s\n", strerror(errno));
258: return;
259: }
260: opcode = ns_msg_getflag(handle, ns_f_opcode);
261: rcode = ns_msg_getflag(handle, ns_f_rcode);
262: id = ns_msg_id(handle);
263: qdcount = ns_msg_count(handle, ns_s_qd);
264: ancount = ns_msg_count(handle, ns_s_an);
265: nscount = ns_msg_count(handle, ns_s_ns);
266: arcount = ns_msg_count(handle, ns_s_ar);
267:
268: /*
269: * Print header fields.
270: */
271: if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode)
272: fprintf(file,
273: ";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n",
1.2 christos 274: _res_opcodes[opcode], p_rcode((int)rcode), id);
1.1 christos 275: if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX))
276: putc(';', file);
277: if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) {
278: fprintf(file, "; flags:");
279: if (ns_msg_getflag(handle, ns_f_qr))
280: fprintf(file, " qr");
281: if (ns_msg_getflag(handle, ns_f_aa))
282: fprintf(file, " aa");
283: if (ns_msg_getflag(handle, ns_f_tc))
284: fprintf(file, " tc");
285: if (ns_msg_getflag(handle, ns_f_rd))
286: fprintf(file, " rd");
287: if (ns_msg_getflag(handle, ns_f_ra))
288: fprintf(file, " ra");
289: if (ns_msg_getflag(handle, ns_f_z))
290: fprintf(file, " ??");
291: if (ns_msg_getflag(handle, ns_f_ad))
292: fprintf(file, " ad");
293: if (ns_msg_getflag(handle, ns_f_cd))
294: fprintf(file, " cd");
295: }
296: if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) {
297: fprintf(file, "; %s: %d",
1.2 christos 298: p_section(ns_s_qd, (int)opcode), qdcount);
1.1 christos 299: fprintf(file, ", %s: %d",
1.2 christos 300: p_section(ns_s_an, (int)opcode), ancount);
1.1 christos 301: fprintf(file, ", %s: %d",
1.2 christos 302: p_section(ns_s_ns, (int)opcode), nscount);
1.1 christos 303: fprintf(file, ", %s: %d",
1.2 christos 304: p_section(ns_s_ar, (int)opcode), arcount);
1.1 christos 305: }
306: if ((!statp->pfcode) || (statp->pfcode &
307: (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) {
308: putc('\n',file);
309: }
310: /*
311: * Print the various sections.
312: */
313: do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file);
314: do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file);
315: do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file);
316: do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file);
317: if (qdcount == 0 && ancount == 0 &&
318: nscount == 0 && arcount == 0)
319: putc('\n', file);
320: }
321:
322: const u_char *
323: p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) {
324: char name[MAXDNAME];
325: int n;
326:
327: if ((n = dn_expand(msg, msg + len, cp, name, sizeof name)) < 0)
328: return (NULL);
329: if (name[0] == '\0')
330: putc('.', file);
331: else
332: fputs(name, file);
333: return (cp + n);
334: }
335:
336: const u_char *
337: p_cdname(const u_char *cp, const u_char *msg, FILE *file) {
338: return (p_cdnname(cp, msg, PACKETSZ, file));
339: }
340:
1.8 christos 341: /*%
342: * Return a fully-qualified domain name from a compressed name (with
1.1 christos 343: length supplied). */
344:
345: const u_char *
346: p_fqnname(cp, msg, msglen, name, namelen)
347: const u_char *cp, *msg;
348: int msglen;
349: char *name;
350: int namelen;
351: {
352: int n, newlen;
353:
354: if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0)
355: return (NULL);
356: newlen = strlen(name);
357: if (newlen == 0 || name[newlen - 1] != '.') {
1.8 christos 358: if (newlen + 1 >= namelen) /*%< Lack space for final dot */
1.1 christos 359: return (NULL);
360: else
361: strcpy(name + newlen, ".");
362: }
363: return (cp + n);
364: }
365:
366: /* XXX: the rest of these functions need to become length-limited, too. */
367:
368: const u_char *
369: p_fqname(const u_char *cp, const u_char *msg, FILE *file) {
370: char name[MAXDNAME];
371: const u_char *n;
372:
373: n = p_fqnname(cp, msg, MAXCDNAME, name, sizeof name);
374: if (n == NULL)
375: return (NULL);
376: fputs(name, file);
377: return (n);
378: }
379:
1.8 christos 380: /*%
1.1 christos 381: * Names of RR classes and qclasses. Classes and qclasses are the same, except
382: * that C_ANY is a qclass but not a class. (You can ask for records of class
383: * C_ANY, but you can't have any records of that class in the database.)
384: */
385: const struct res_sym __p_class_syms[] = {
386: {C_IN, "IN", (char *)0},
387: {C_CHAOS, "CH", (char *)0},
388: {C_CHAOS, "CHAOS", (char *)0},
389: {C_HS, "HS", (char *)0},
390: {C_HS, "HESIOD", (char *)0},
391: {C_ANY, "ANY", (char *)0},
392: {C_NONE, "NONE", (char *)0},
393: {C_IN, (char *)0, (char *)0}
394: };
395:
1.8 christos 396: /*%
1.1 christos 397: * Names of message sections.
398: */
399: const struct res_sym __p_default_section_syms[] = {
400: {ns_s_qd, "QUERY", (char *)0},
401: {ns_s_an, "ANSWER", (char *)0},
402: {ns_s_ns, "AUTHORITY", (char *)0},
403: {ns_s_ar, "ADDITIONAL", (char *)0},
404: {0, (char *)0, (char *)0}
405: };
406:
407: const struct res_sym __p_update_section_syms[] = {
408: {S_ZONE, "ZONE", (char *)0},
409: {S_PREREQ, "PREREQUISITE", (char *)0},
410: {S_UPDATE, "UPDATE", (char *)0},
411: {S_ADDT, "ADDITIONAL", (char *)0},
412: {0, (char *)0, (char *)0}
413: };
414:
415: const struct res_sym __p_key_syms[] = {
416: {NS_ALG_MD5RSA, "RSA", "RSA KEY with MD5 hash"},
417: {NS_ALG_DH, "DH", "Diffie Hellman"},
418: {NS_ALG_DSA, "DSA", "Digital Signature Algorithm"},
419: {NS_ALG_EXPIRE_ONLY, "EXPIREONLY", "No algorithm"},
420: {NS_ALG_PRIVATE_OID, "PRIVATE", "Algorithm obtained from OID"},
421: {0, NULL, NULL}
422: };
423:
424: const struct res_sym __p_cert_syms[] = {
425: {cert_t_pkix, "PKIX", "PKIX (X.509v3) Certificate"},
426: {cert_t_spki, "SPKI", "SPKI certificate"},
427: {cert_t_pgp, "PGP", "PGP certificate"},
428: {cert_t_url, "URL", "URL Private"},
429: {cert_t_oid, "OID", "OID Private"},
430: {0, NULL, NULL}
431: };
432:
1.8 christos 433: /*%
1.1 christos 434: * Names of RR types and qtypes. Types and qtypes are the same, except
435: * that T_ANY is a qtype but not a type. (You can ask for records of type
436: * T_ANY, but you can't have any records of that type in the database.)
437: */
438: const struct res_sym __p_type_syms[] = {
439: {ns_t_a, "A", "address"},
440: {ns_t_ns, "NS", "name server"},
441: {ns_t_md, "MD", "mail destination (deprecated)"},
442: {ns_t_mf, "MF", "mail forwarder (deprecated)"},
443: {ns_t_cname, "CNAME", "canonical name"},
444: {ns_t_soa, "SOA", "start of authority"},
445: {ns_t_mb, "MB", "mailbox"},
446: {ns_t_mg, "MG", "mail group member"},
447: {ns_t_mr, "MR", "mail rename"},
448: {ns_t_null, "NULL", "null"},
449: {ns_t_wks, "WKS", "well-known service (deprecated)"},
450: {ns_t_ptr, "PTR", "domain name pointer"},
451: {ns_t_hinfo, "HINFO", "host information"},
452: {ns_t_minfo, "MINFO", "mailbox information"},
453: {ns_t_mx, "MX", "mail exchanger"},
454: {ns_t_txt, "TXT", "text"},
455: {ns_t_rp, "RP", "responsible person"},
456: {ns_t_afsdb, "AFSDB", "DCE or AFS server"},
457: {ns_t_x25, "X25", "X25 address"},
458: {ns_t_isdn, "ISDN", "ISDN address"},
459: {ns_t_rt, "RT", "router"},
460: {ns_t_nsap, "NSAP", "nsap address"},
461: {ns_t_nsap_ptr, "NSAP_PTR", "domain name pointer"},
462: {ns_t_sig, "SIG", "signature"},
463: {ns_t_key, "KEY", "key"},
464: {ns_t_px, "PX", "mapping information"},
465: {ns_t_gpos, "GPOS", "geographical position (withdrawn)"},
466: {ns_t_aaaa, "AAAA", "IPv6 address"},
467: {ns_t_loc, "LOC", "location"},
468: {ns_t_nxt, "NXT", "next valid name (unimplemented)"},
469: {ns_t_eid, "EID", "endpoint identifier (unimplemented)"},
470: {ns_t_nimloc, "NIMLOC", "NIMROD locator (unimplemented)"},
471: {ns_t_srv, "SRV", "server selection"},
472: {ns_t_atma, "ATMA", "ATM address (unimplemented)"},
473: {ns_t_tkey, "TKEY", "tkey"},
474: {ns_t_tsig, "TSIG", "transaction signature"},
475: {ns_t_ixfr, "IXFR", "incremental zone transfer"},
476: {ns_t_axfr, "AXFR", "zone transfer"},
477: {ns_t_zxfr, "ZXFR", "compressed zone transfer"},
478: {ns_t_mailb, "MAILB", "mailbox-related data (deprecated)"},
479: {ns_t_maila, "MAILA", "mail agent (deprecated)"},
480: {ns_t_naptr, "NAPTR", "URN Naming Authority"},
481: {ns_t_kx, "KX", "Key Exchange"},
482: {ns_t_cert, "CERT", "Certificate"},
483: {ns_t_a6, "A6", "IPv6 Address"},
484: {ns_t_dname, "DNAME", "dname"},
485: {ns_t_sink, "SINK", "Kitchen Sink (experimental)"},
486: {ns_t_opt, "OPT", "EDNS Options"},
487: {ns_t_any, "ANY", "\"any\""},
488: {0, NULL, NULL}
489: };
490:
1.8 christos 491: /*%
1.1 christos 492: * Names of DNS rcodes.
493: */
494: const struct res_sym __p_rcode_syms[] = {
495: {ns_r_noerror, "NOERROR", "no error"},
496: {ns_r_formerr, "FORMERR", "format error"},
497: {ns_r_servfail, "SERVFAIL", "server failed"},
498: {ns_r_nxdomain, "NXDOMAIN", "no such domain name"},
499: {ns_r_notimpl, "NOTIMP", "not implemented"},
500: {ns_r_refused, "REFUSED", "refused"},
501: {ns_r_yxdomain, "YXDOMAIN", "domain name exists"},
502: {ns_r_yxrrset, "YXRRSET", "rrset exists"},
503: {ns_r_nxrrset, "NXRRSET", "rrset doesn't exist"},
504: {ns_r_notauth, "NOTAUTH", "not authoritative"},
505: {ns_r_notzone, "NOTZONE", "Not in zone"},
506: {ns_r_max, "", ""},
507: {ns_r_badsig, "BADSIG", "bad signature"},
508: {ns_r_badkey, "BADKEY", "bad key"},
509: {ns_r_badtime, "BADTIME", "bad time"},
510: {0, NULL, NULL}
511: };
512:
513: int
514: sym_ston(const struct res_sym *syms, const char *name, int *success) {
1.3 christos 515: for (; syms->name != 0; syms++) {
1.1 christos 516: if (strcasecmp (name, syms->name) == 0) {
517: if (success)
518: *success = 1;
519: return (syms->number);
520: }
521: }
522: if (success)
523: *success = 0;
1.8 christos 524: return (syms->number); /*%< The default value. */
1.1 christos 525: }
526:
527: const char *
528: sym_ntos(const struct res_sym *syms, int number, int *success) {
1.8 christos 529: char *unname = sym_ntos_unname;
1.1 christos 530:
1.2 christos 531: for (; syms->name != 0; syms++) {
1.1 christos 532: if (number == syms->number) {
533: if (success)
534: *success = 1;
535: return (syms->name);
536: }
537: }
538:
1.8 christos 539: sprintf(unname, "%d", number); /*%< XXX nonreentrant */
1.1 christos 540: if (success)
541: *success = 0;
542: return (unname);
543: }
544:
545: const char *
546: sym_ntop(const struct res_sym *syms, int number, int *success) {
1.8 christos 547: char *unname = sym_ntop_unname;
1.1 christos 548:
1.2 christos 549: for (; syms->name != 0; syms++) {
1.1 christos 550: if (number == syms->number) {
551: if (success)
552: *success = 1;
553: return (syms->humanname);
554: }
555: }
1.8 christos 556: sprintf(unname, "%d", number); /*%< XXX nonreentrant */
1.1 christos 557: if (success)
558: *success = 0;
559: return (unname);
560: }
561:
1.8 christos 562: /*%
1.1 christos 563: * Return a string for the type.
564: */
565: const char *
566: p_type(int type) {
567: int success;
568: const char *result;
569: static char typebuf[20];
570:
571: result = sym_ntos(__p_type_syms, type, &success);
572: if (success)
573: return (result);
1.7 christos 574: if (type < 0 || type > 0xffff)
1.1 christos 575: return ("BADTYPE");
576: sprintf(typebuf, "TYPE%d", type);
577: return (typebuf);
578: }
579:
1.8 christos 580: /*%
1.1 christos 581: * Return a string for the type.
582: */
583: const char *
584: p_section(int section, int opcode) {
585: const struct res_sym *symbols;
586:
587: switch (opcode) {
588: case ns_o_update:
589: symbols = __p_update_section_syms;
590: break;
591: default:
592: symbols = __p_default_section_syms;
593: break;
594: }
595: return (sym_ntos(symbols, section, (int *)0));
596: }
597:
1.8 christos 598: /*%
1.1 christos 599: * Return a mnemonic for class.
600: */
601: const char *
602: p_class(int class) {
603: int success;
604: const char *result;
605: static char classbuf[20];
606:
607: result = sym_ntos(__p_class_syms, class, &success);
608: if (success)
609: return (result);
1.7 christos 610: if (class < 0 || class > 0xffff)
1.1 christos 611: return ("BADCLASS");
612: sprintf(classbuf, "CLASS%d", class);
613: return (classbuf);
614: }
615:
1.8 christos 616: /*%
1.1 christos 617: * Return a mnemonic for an option
618: */
619: const char *
620: p_option(u_long option) {
1.8 christos 621: char *nbuf = p_option_nbuf;
1.1 christos 622:
623: switch (option) {
624: case RES_INIT: return "init";
625: case RES_DEBUG: return "debug";
626: case RES_AAONLY: return "aaonly(unimpl)";
627: case RES_USEVC: return "usevc";
628: case RES_PRIMARY: return "primry(unimpl)";
629: case RES_IGNTC: return "igntc";
630: case RES_RECURSE: return "recurs";
631: case RES_DEFNAMES: return "defnam";
632: case RES_STAYOPEN: return "styopn";
633: case RES_DNSRCH: return "dnsrch";
634: case RES_INSECURE1: return "insecure1";
635: case RES_INSECURE2: return "insecure2";
636: case RES_NOALIASES: return "noaliases";
637: case RES_USE_INET6: return "inet6";
1.8 christos 638: #ifdef RES_USE_EDNS0 /*%< KAME extension */
1.1 christos 639: case RES_USE_EDNS0: return "edns0";
640: #endif
641: #ifdef RES_USE_DNAME
642: case RES_USE_DNAME: return "dname";
643: #endif
644: #ifdef RES_USE_DNSSEC
645: case RES_USE_DNSSEC: return "dnssec";
646: #endif
647: #ifdef RES_NOTLDQUERY
648: case RES_NOTLDQUERY: return "no-tld-query";
649: #endif
650: #ifdef RES_NO_NIBBLE2
651: case RES_NO_NIBBLE2: return "no-nibble2";
652: #endif
653: /* XXX nonreentrant */
654: default: sprintf(nbuf, "?0x%lx?", (u_long)option);
655: return (nbuf);
656: }
657: }
658:
1.8 christos 659: /*%
1.1 christos 660: * Return a mnemonic for a time to live.
661: */
662: const char *
663: p_time(u_int32_t value) {
1.8 christos 664: char *nbuf = p_time_nbuf;
1.1 christos 665:
1.2 christos 666: if (ns_format_ttl((u_long)value, nbuf, sizeof nbuf) < 0)
1.1 christos 667: sprintf(nbuf, "%u", value);
668: return (nbuf);
669: }
670:
1.8 christos 671: /*%
1.1 christos 672: * Return a string for the rcode.
673: */
674: const char *
675: p_rcode(int rcode) {
676: return (sym_ntos(__p_rcode_syms, rcode, (int *)0));
677: }
678:
1.8 christos 679: /*%
1.1 christos 680: * Return a string for a res_sockaddr_union.
681: */
682: const char *
683: p_sockun(union res_sockaddr_union u, char *buf, size_t size) {
684: char ret[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:123.123.123.123"];
685:
686: switch (u.sin.sin_family) {
687: case AF_INET:
688: inet_ntop(AF_INET, &u.sin.sin_addr, ret, sizeof ret);
689: break;
690: #ifdef HAS_INET6_STRUCTS
691: case AF_INET6:
692: inet_ntop(AF_INET6, &u.sin6.sin6_addr, ret, sizeof ret);
693: break;
694: #endif
695: default:
696: sprintf(ret, "[af%d]", u.sin.sin_family);
697: break;
698: }
699: if (size > 0U) {
700: strncpy(buf, ret, size - 1);
701: buf[size - 1] = '0';
702: }
703: return (buf);
704: }
705:
1.8 christos 706: /*%
1.1 christos 707: * routines to convert between on-the-wire RR format and zone file format.
708: * Does not contain conversion to/from decimal degrees; divide or multiply
709: * by 60*60*1000 for that.
710: */
711:
712: static unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000,
713: 1000000,10000000,100000000,1000000000};
714:
1.8 christos 715: /*% takes an XeY precision/size value, returns a string representation. */
1.1 christos 716: static const char *
717: precsize_ntoa(prec)
1.3 christos 718: u_int32_t prec;
1.1 christos 719: {
1.8 christos 720: char *retbuf = precsize_ntoa_retbuf;
1.1 christos 721: unsigned long val;
722: int mantissa, exponent;
723:
724: mantissa = (int)((prec >> 4) & 0x0f) % 10;
725: exponent = (int)((prec >> 0) & 0x0f) % 10;
726:
727: val = mantissa * poweroften[exponent];
728:
729: (void) sprintf(retbuf, "%lu.%.2lu", val/100, val%100);
730: return (retbuf);
731: }
732:
1.8 christos 733: /*% converts ascii size/precision X * 10**Y(cm) to 0xXY. moves pointer. */
1.1 christos 734: static u_int8_t
735: precsize_aton(const char **strptr) {
736: unsigned int mval = 0, cmval = 0;
737: u_int8_t retval = 0;
738: const char *cp;
739: int exponent;
740: int mantissa;
741:
742: cp = *strptr;
743:
744: while (isdigit((unsigned char)*cp))
745: mval = mval * 10 + (*cp++ - '0');
746:
1.8 christos 747: if (*cp == '.') { /*%< centimeters */
1.1 christos 748: cp++;
749: if (isdigit((unsigned char)*cp)) {
750: cmval = (*cp++ - '0') * 10;
751: if (isdigit((unsigned char)*cp)) {
752: cmval += (*cp++ - '0');
753: }
754: }
755: }
756: cmval = (mval * 100) + cmval;
757:
758: for (exponent = 0; exponent < 9; exponent++)
759: if (cmval < poweroften[exponent+1])
760: break;
761:
762: mantissa = cmval / poweroften[exponent];
763: if (mantissa > 9)
764: mantissa = 9;
765:
766: retval = (mantissa << 4) | exponent;
767:
768: *strptr = cp;
769:
770: return (retval);
771: }
772:
1.8 christos 773: /*% converts ascii lat/lon to unsigned encoded 32-bit number. moves pointer. */
1.1 christos 774: static u_int32_t
775: latlon2ul(const char **latlonstrptr, int *which) {
776: const char *cp;
777: u_int32_t retval;
778: int deg = 0, min = 0, secs = 0, secsfrac = 0;
779:
780: cp = *latlonstrptr;
781:
782: while (isdigit((unsigned char)*cp))
783: deg = deg * 10 + (*cp++ - '0');
784:
785: while (isspace((unsigned char)*cp))
786: cp++;
787:
788: if (!(isdigit((unsigned char)*cp)))
789: goto fndhemi;
790:
791: while (isdigit((unsigned char)*cp))
792: min = min * 10 + (*cp++ - '0');
793:
794: while (isspace((unsigned char)*cp))
795: cp++;
796:
797: if (!(isdigit((unsigned char)*cp)))
798: goto fndhemi;
799:
800: while (isdigit((unsigned char)*cp))
801: secs = secs * 10 + (*cp++ - '0');
802:
1.8 christos 803: if (*cp == '.') { /*%< decimal seconds */
1.1 christos 804: cp++;
805: if (isdigit((unsigned char)*cp)) {
806: secsfrac = (*cp++ - '0') * 100;
807: if (isdigit((unsigned char)*cp)) {
808: secsfrac += (*cp++ - '0') * 10;
809: if (isdigit((unsigned char)*cp)) {
810: secsfrac += (*cp++ - '0');
811: }
812: }
813: }
814: }
815:
1.8 christos 816: while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */
1.1 christos 817: cp++;
818:
819: while (isspace((unsigned char)*cp))
820: cp++;
821:
822: fndhemi:
823: switch (*cp) {
824: case 'N': case 'n':
825: case 'E': case 'e':
826: retval = ((unsigned)1<<31)
827: + (((((deg * 60) + min) * 60) + secs) * 1000)
828: + secsfrac;
829: break;
830: case 'S': case 's':
831: case 'W': case 'w':
832: retval = ((unsigned)1<<31)
833: - (((((deg * 60) + min) * 60) + secs) * 1000)
834: - secsfrac;
835: break;
836: default:
1.8 christos 837: retval = 0; /*%< invalid value -- indicates error */
1.1 christos 838: break;
839: }
840:
841: switch (*cp) {
842: case 'N': case 'n':
843: case 'S': case 's':
1.8 christos 844: *which = 1; /*%< latitude */
1.1 christos 845: break;
846: case 'E': case 'e':
847: case 'W': case 'w':
1.8 christos 848: *which = 2; /*%< longitude */
1.1 christos 849: break;
850: default:
1.8 christos 851: *which = 0; /*%< error */
1.1 christos 852: break;
853: }
854:
1.8 christos 855: cp++; /*%< skip the hemisphere */
856: while (!isspace((unsigned char)*cp)) /*%< if any trailing garbage */
1.1 christos 857: cp++;
858:
1.8 christos 859: while (isspace((unsigned char)*cp)) /*%< move to next field */
1.1 christos 860: cp++;
861:
862: *latlonstrptr = cp;
863:
864: return (retval);
865: }
866:
1.8 christos 867: /*%
868: * converts a zone file representation in a string to an RDATA on-the-wire
1.1 christos 869: * representation. */
870: int
871: loc_aton(ascii, binary)
872: const char *ascii;
873: u_char *binary;
874: {
875: const char *cp, *maxcp;
876: u_char *bcp;
877:
878: u_int32_t latit = 0, longit = 0, alt = 0;
879: u_int32_t lltemp1 = 0, lltemp2 = 0;
880: int altmeters = 0, altfrac = 0, altsign = 1;
1.8 christos 881: u_int8_t hp = 0x16; /*%< default = 1e6 cm = 10000.00m = 10km */
882: u_int8_t vp = 0x13; /*%< default = 1e3 cm = 10.00m */
883: u_int8_t siz = 0x12; /*%< default = 1e2 cm = 1.00m */
1.1 christos 884: int which1 = 0, which2 = 0;
885:
886: cp = ascii;
887: maxcp = cp + strlen(ascii);
888:
889: lltemp1 = latlon2ul(&cp, &which1);
890:
891: lltemp2 = latlon2ul(&cp, &which2);
892:
893: switch (which1 + which2) {
1.8 christos 894: case 3: /*%< 1 + 2, the only valid combination */
895: if ((which1 == 1) && (which2 == 2)) { /*%< normal case */
1.1 christos 896: latit = lltemp1;
897: longit = lltemp2;
1.8 christos 898: } else if ((which1 == 2) && (which2 == 1)) { /*%< reversed */
1.1 christos 899: longit = lltemp1;
900: latit = lltemp2;
1.8 christos 901: } else { /*%< some kind of brokenness */
1.1 christos 902: return (0);
903: }
904: break;
1.8 christos 905: default: /*%< we didn't get one of each */
1.1 christos 906: return (0);
907: }
908:
909: /* altitude */
910: if (*cp == '-') {
911: altsign = -1;
912: cp++;
913: }
914:
915: if (*cp == '+')
916: cp++;
917:
918: while (isdigit((unsigned char)*cp))
919: altmeters = altmeters * 10 + (*cp++ - '0');
920:
1.8 christos 921: if (*cp == '.') { /*%< decimal meters */
1.1 christos 922: cp++;
923: if (isdigit((unsigned char)*cp)) {
924: altfrac = (*cp++ - '0') * 10;
925: if (isdigit((unsigned char)*cp)) {
926: altfrac += (*cp++ - '0');
927: }
928: }
929: }
930:
931: alt = (10000000 + (altsign * (altmeters * 100 + altfrac)));
932:
1.8 christos 933: while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */
1.1 christos 934: cp++;
935:
936: while (isspace((unsigned char)*cp) && (cp < maxcp))
937: cp++;
938:
939: if (cp >= maxcp)
940: goto defaults;
941:
942: siz = precsize_aton(&cp);
943:
1.8 christos 944: while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */
1.1 christos 945: cp++;
946:
947: while (isspace((unsigned char)*cp) && (cp < maxcp))
948: cp++;
949:
950: if (cp >= maxcp)
951: goto defaults;
952:
953: hp = precsize_aton(&cp);
954:
1.8 christos 955: while (!isspace((unsigned char)*cp) && (cp < maxcp)) /*%< if trailing garbage or m */
1.1 christos 956: cp++;
957:
958: while (isspace((unsigned char)*cp) && (cp < maxcp))
959: cp++;
960:
961: if (cp >= maxcp)
962: goto defaults;
963:
964: vp = precsize_aton(&cp);
965:
966: defaults:
967:
968: bcp = binary;
1.8 christos 969: *bcp++ = (u_int8_t) 0; /*%< version byte */
1.1 christos 970: *bcp++ = siz;
971: *bcp++ = hp;
972: *bcp++ = vp;
973: PUTLONG(latit,bcp);
974: PUTLONG(longit,bcp);
975: PUTLONG(alt,bcp);
976:
1.8 christos 977: return (16); /*%< size of RR in octets */
1.1 christos 978: }
979:
1.8 christos 980: /*% takes an on-the-wire LOC RR and formats it in a human readable format. */
1.1 christos 981: const char *
982: loc_ntoa(binary, ascii)
983: const u_char *binary;
984: char *ascii;
985: {
986: static const char *error = "?";
987: static char tmpbuf[sizeof
988: "1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"];
989: const u_char *cp = binary;
990:
991: int latdeg, latmin, latsec, latsecfrac;
992: int longdeg, longmin, longsec, longsecfrac;
993: char northsouth, eastwest;
994: const char *altsign;
995: int altmeters, altfrac;
996:
997: const u_int32_t referencealt = 100000 * 100;
998:
999: int32_t latval, longval, altval;
1000: u_int32_t templ;
1001: u_int8_t sizeval, hpval, vpval, versionval;
1002:
1003: char *sizestr, *hpstr, *vpstr;
1004:
1005: versionval = *cp++;
1006:
1007: if (ascii == NULL)
1008: ascii = tmpbuf;
1009:
1010: if (versionval) {
1011: (void) sprintf(ascii, "; error: unknown LOC RR version");
1012: return (ascii);
1013: }
1014:
1015: sizeval = *cp++;
1016:
1017: hpval = *cp++;
1018: vpval = *cp++;
1019:
1020: GETLONG(templ, cp);
1021: latval = (templ - ((unsigned)1<<31));
1022:
1023: GETLONG(templ, cp);
1024: longval = (templ - ((unsigned)1<<31));
1025:
1026: GETLONG(templ, cp);
1.8 christos 1027: if (templ < referencealt) { /*%< below WGS 84 spheroid */
1.1 christos 1028: altval = referencealt - templ;
1029: altsign = "-";
1030: } else {
1031: altval = templ - referencealt;
1032: altsign = "";
1033: }
1034:
1035: if (latval < 0) {
1036: northsouth = 'S';
1037: latval = -latval;
1038: } else
1039: northsouth = 'N';
1040:
1041: latsecfrac = latval % 1000;
1042: latval = latval / 1000;
1043: latsec = latval % 60;
1044: latval = latval / 60;
1045: latmin = latval % 60;
1046: latval = latval / 60;
1047: latdeg = latval;
1048:
1049: if (longval < 0) {
1050: eastwest = 'W';
1051: longval = -longval;
1052: } else
1053: eastwest = 'E';
1054:
1055: longsecfrac = longval % 1000;
1056: longval = longval / 1000;
1057: longsec = longval % 60;
1058: longval = longval / 60;
1059: longmin = longval % 60;
1060: longval = longval / 60;
1061: longdeg = longval;
1062:
1063: altfrac = altval % 100;
1064: altmeters = (altval / 100);
1065:
1.2 christos 1066: sizestr = strdup(precsize_ntoa((u_int32_t)sizeval));
1067: hpstr = strdup(precsize_ntoa((u_int32_t)hpval));
1068: vpstr = strdup(precsize_ntoa((u_int32_t)vpval));
1.1 christos 1069:
1070: sprintf(ascii,
1071: "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm",
1072: latdeg, latmin, latsec, latsecfrac, northsouth,
1073: longdeg, longmin, longsec, longsecfrac, eastwest,
1074: altsign, altmeters, altfrac,
1075: (sizestr != NULL) ? sizestr : error,
1076: (hpstr != NULL) ? hpstr : error,
1077: (vpstr != NULL) ? vpstr : error);
1078:
1079: if (sizestr != NULL)
1080: free(sizestr);
1081: if (hpstr != NULL)
1082: free(hpstr);
1083: if (vpstr != NULL)
1084: free(vpstr);
1085:
1086: return (ascii);
1087: }
1088:
1089:
1.8 christos 1090: /*% Return the number of DNS hierarchy levels in the name. */
1.1 christos 1091: int
1092: dn_count_labels(const char *name) {
1093: int i, len, count;
1094:
1095: len = strlen(name);
1096: for (i = 0, count = 0; i < len; i++) {
1097: /* XXX need to check for \. or use named's nlabels(). */
1098: if (name[i] == '.')
1099: count++;
1100: }
1101:
1102: /* don't count initial wildcard */
1103: if (name[0] == '*')
1104: if (count)
1105: count--;
1106:
1107: /* don't count the null label for root. */
1108: /* if terminating '.' not found, must adjust */
1109: /* count to include last label */
1110: if (len > 0 && name[len-1] != '.')
1111: count++;
1112: return (count);
1113: }
1114:
1.8 christos 1115: /*%
1.1 christos 1116: * Make dates expressed in seconds-since-Jan-1-1970 easy to read.
1117: * SIG records are required to be printed like this, by the Secure DNS RFC.
1118: */
1119: char *
1120: p_secstodate (u_long secs) {
1121: /* XXX nonreentrant */
1.8 christos 1122: char *output = p_secstodate_output;
1.2 christos 1123: time_t myclock = secs;
1124: struct tm *mytime;
1.1 christos 1125: #ifdef HAVE_TIME_R
1126: struct tm res;
1127:
1.2 christos 1128: mytime = gmtime_r(&myclock, &res);
1.1 christos 1129: #else
1.2 christos 1130: mytime = gmtime(&myclock);
1.1 christos 1131: #endif
1.2 christos 1132: mytime->tm_year += 1900;
1133: mytime->tm_mon += 1;
1.1 christos 1134: sprintf(output, "%04d%02d%02d%02d%02d%02d",
1.2 christos 1135: mytime->tm_year, mytime->tm_mon, mytime->tm_mday,
1136: mytime->tm_hour, mytime->tm_min, mytime->tm_sec);
1.1 christos 1137: return (output);
1138: }
1139:
1140: u_int16_t
1141: res_nametoclass(const char *buf, int *successp) {
1142: unsigned long result;
1143: char *endptr;
1144: int success;
1145:
1146: result = sym_ston(__p_class_syms, buf, &success);
1147: if (success)
1148: goto done;
1149:
1150: if (strncasecmp(buf, "CLASS", 5) != 0 ||
1151: !isdigit((unsigned char)buf[5]))
1152: goto done;
1153: errno = 0;
1154: result = strtoul(buf + 5, &endptr, 10);
1155: if (errno == 0 && *endptr == '\0' && result <= 0xffffU)
1156: success = 1;
1157: done:
1158: if (successp)
1159: *successp = success;
1.2 christos 1160: return (u_int16_t)(result);
1.1 christos 1161: }
1162:
1163: u_int16_t
1164: res_nametotype(const char *buf, int *successp) {
1165: unsigned long result;
1166: char *endptr;
1167: int success;
1168:
1169: result = sym_ston(__p_type_syms, buf, &success);
1170: if (success)
1171: goto done;
1172:
1173: if (strncasecmp(buf, "type", 4) != 0 ||
1174: !isdigit((unsigned char)buf[4]))
1175: goto done;
1176: errno = 0;
1177: result = strtoul(buf + 4, &endptr, 10);
1178: if (errno == 0 && *endptr == '\0' && result <= 0xffffU)
1179: success = 1;
1180: done:
1181: if (successp)
1182: *successp = success;
1.2 christos 1183: return (u_int16_t)(result);
1.1 christos 1184: }
1.8 christos 1185:
1186: /*! \file */
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