The Tor Browser: other-licenses/android/res_debug.c@7e26c7da4463 (annotated)

other-licenses/android/res_debug.c@7e26c7da4463 (annotated)

other-licenses/android/res_debug.c

Wed, 31 Dec 2014 06:55:50 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:55:50 +0100
changeset 2: 7e26c7da4463
permissions: -rw-r--r--

Added tag UPSTREAM_283F7C6 for changeset ca08bd8f51b2

 /*	$NetBSD: res_debug.c,v 1.7 2004/11/07 02:25:01 christos Exp $	*/
 /*
  * Copyright (c) 1985
  *    The Regents of the University of California.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. All advertising materials mentioning features or use of this software
  *    must display the following acknowledgement:
  * 	This product includes software developed by the University of
  * 	California, Berkeley and its contributors.
  * 4. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
 /*
  * Portions Copyright (c) 1993 by Digital Equipment Corporation.
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies, and that
  * the name of Digital Equipment Corporation not be used in advertising or
  * publicity pertaining to distribution of the document or software without
  * specific, written prior permission.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
  * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
  * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
  * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
  * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  * SOFTWARE.
  */
 /*
  * Portions Copyright (c) 1995 by International Business Machines, Inc.
  *
  * International Business Machines, Inc. (hereinafter called IBM) grants
  * permission under its copyrights to use, copy, modify, and distribute this
  * Software with or without fee, provided that the above copyright notice and
  * all paragraphs of this notice appear in all copies, and that the name of IBM
  * not be used in connection with the marketing of any product incorporating
  * the Software or modifications thereof, without specific, written prior
  * permission.
  *
  * To the extent it has a right to do so, IBM grants an immunity from suit
  * under its patents, if any, for the use, sale or manufacture of products to
  * the extent that such products are used for performing Domain Name System
  * dynamic updates in TCP/IP networks by means of the Software.  No immunity is
  * granted for any product per se or for any other function of any product.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES,
  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  * PARTICULAR PURPOSE.  IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL,
  * DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING
  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN
  * IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES.
  */
 /*
  * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
  * Portions Copyright (c) 1996-1999 by Internet Software Consortium.
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 /*
  * This version of this file is derived from Android 2.3 "Gingerbread",
  * which contains uncredited changes by Android/Google developers.  It has
  * been modified in 2011 for use in the Android build of Mozilla Firefox by
  * Mozilla contributors (including Michael Edwards <m.k.edwards@gmail.com>,
  * and Steve Workman <sjhworkman@gmail.com>).
  * These changes are offered under the same license as the original NetBSD
  * file, whose copyright and license are unchanged above.
  */
 #define ANDROID_CHANGES 1
 #define MOZILLA_NECKO_EXCLUDE_CODE 1
 #include <sys/cdefs.h>
 #if defined(LIBC_SCCS) && !defined(lint)
 #ifdef notdef
 static const char sccsid[] = "@(#)res_debug.c	8.1 (Berkeley) 6/4/93";
 static const char rcsid[] = "Id: res_debug.c,v 1.3.2.5.4.5 2004/07/28 20:16:46 marka Exp";
 #else
 __RCSID("$NetBSD: res_debug.c,v 1.7 2004/11/07 02:25:01 christos Exp $");
 #endif
 #endif /* LIBC_SCCS and not lint */
 #include <sys/types.h>
 #include <sys/param.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include "arpa_nameser.h"
 #include <ctype.h>
 #include <errno.h>
 #include <math.h>
 #include <netdb.h>
 #include "resolv_private.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
 #ifdef SPRINTF_CHAR
 # define SPRINTF(x) strlen(sprintf/**/x)
 #else
 # define SPRINTF(x) sprintf x
 #endif
 #ifndef MOZILLA_NECKO_EXCLUDE_CODE
 static const char *precsize_ntoa(u_int32_t);
 #endif
 extern const char * const _res_opcodes[];
 extern const char * const _res_sectioncodes[];
 #ifndef MOZILLA_NECKO_EXCLUDE_CODE
 #ifndef _LIBC
 /*
  * Print the current options.
  */
 void
 fp_resstat(const res_state statp, FILE *file) {
 	u_long mask;
 	fprintf(file, ";; res options:");
 	for (mask = 1;  mask != 0U;  mask <<= 1)
 		if (statp->options & mask)
 			fprintf(file, " %s", p_option(mask));
 	putc('\n', file);
 }
 #endif
 #endif
 static void
 do_section(const res_state statp,
 	   ns_msg *handle, ns_sect section,
 	   int pflag, FILE *file)
 {
 	int n, sflag, rrnum;
 	int buflen = 2048;
 	char *buf;
 	ns_opcode opcode;
 	ns_rr rr;
 	/*
 	 * Print answer records.
 	 */
 	sflag = (statp->pfcode & pflag);
 	if (statp->pfcode && !sflag)
 		return;
 	buf = malloc((size_t)buflen);
 	if (buf == NULL) {
 		fprintf(file, ";; memory allocation failure\n");
 		return;
 	}
 	opcode = (ns_opcode) ns_msg_getflag(*handle, ns_f_opcode);
 	rrnum = 0;
 	for (;;) {
 		if (ns_parserr(handle, section, rrnum, &rr)) {
 			if (errno != ENODEV)
 				fprintf(file, ";; ns_parserr: %s\n",
 					strerror(errno));
 			else if (rrnum > 0 && sflag != 0 &&
 				 (statp->pfcode & RES_PRF_HEAD1))
 				putc('\n', file);
 			goto cleanup;
 		}
 		if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1))
 			fprintf(file, ";; %s SECTION:\n",
 				p_section(section, opcode));
 		if (section == ns_s_qd)
 			fprintf(file, ";;\t%s, type = %s, class = %s\n",
 				ns_rr_name(rr),
 				p_type(ns_rr_type(rr)),
 				p_class(ns_rr_class(rr)));
 		else if (section == ns_s_ar && ns_rr_type(rr) == ns_t_opt) {
 			u_int32_t ttl = ns_rr_ttl(rr);
 			fprintf(file,
 				"; EDNS: version: %u, udp=%u, flags=%04x\n",
 				(ttl>>16)&0xff, ns_rr_class(rr), ttl&0xffff);
 		} else {
 			n = ns_sprintrr(handle, &rr, NULL, NULL,
 					buf, (u_int)buflen);
 			if (n < 0) {
 				if (errno == ENOSPC) {
 					free(buf);
 					buf = NULL;
 					if (buflen < 131072)
 						buf = malloc((size_t)(buflen += 1024));
 					if (buf == NULL) {
 						fprintf(file,
 				              ";; memory allocation failure\n");
 					      return;
 					}
 					continue;
 				}
 				fprintf(file, ";; ns_sprintrr: %s\n",
 					strerror(errno));
 				goto cleanup;
 			}
 			fputs(buf, file);
 			fputc('\n', file);
 		}
 		rrnum++;
 	}
  cleanup:
 	if (buf != NULL)
 		free(buf);
 }
 /*
  * Print the contents of a query.
  * This is intended to be primarily a debugging routine.
  */
 void
 res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) {
 	ns_msg handle;
 	int qdcount, ancount, nscount, arcount;
 	u_int opcode, rcode, id;
 	if (ns_initparse(msg, len, &handle) < 0) {
 		fprintf(file, ";; ns_initparse: %s\n", strerror(errno));
 		return;
 	}
 	opcode = ns_msg_getflag(handle, ns_f_opcode);
 	rcode = ns_msg_getflag(handle, ns_f_rcode);
 	id = ns_msg_id(handle);
 	qdcount = ns_msg_count(handle, ns_s_qd);
 	ancount = ns_msg_count(handle, ns_s_an);
 	nscount = ns_msg_count(handle, ns_s_ns);
 	arcount = ns_msg_count(handle, ns_s_ar);
 	/*
 	 * Print header fields.
 	 */
 	if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode)
 		fprintf(file,
 			";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n",
 			_res_opcodes[opcode], p_rcode((int)rcode), id);
 	if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX))
 		putc(';', file);
 	if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) {
 		fprintf(file, "; flags:");
 		if (ns_msg_getflag(handle, ns_f_qr))
 			fprintf(file, " qr");
 		if (ns_msg_getflag(handle, ns_f_aa))
 			fprintf(file, " aa");
 		if (ns_msg_getflag(handle, ns_f_tc))
 			fprintf(file, " tc");
 		if (ns_msg_getflag(handle, ns_f_rd))
 			fprintf(file, " rd");
 		if (ns_msg_getflag(handle, ns_f_ra))
 			fprintf(file, " ra");
 		if (ns_msg_getflag(handle, ns_f_z))
 			fprintf(file, " ??");
 		if (ns_msg_getflag(handle, ns_f_ad))
 			fprintf(file, " ad");
 		if (ns_msg_getflag(handle, ns_f_cd))
 			fprintf(file, " cd");
 	}
 	if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) {
 		fprintf(file, "; %s: %d",
 			p_section(ns_s_qd, (int)opcode), qdcount);
 		fprintf(file, ", %s: %d",
 			p_section(ns_s_an, (int)opcode), ancount);
 		fprintf(file, ", %s: %d",
 			p_section(ns_s_ns, (int)opcode), nscount);
 		fprintf(file, ", %s: %d",
 			p_section(ns_s_ar, (int)opcode), arcount);
 	}
 	if ((!statp->pfcode) || (statp->pfcode &
 		(RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) {
 		putc('\n',file);
 	}
 	/*
 	 * Print the various sections.
 	 */
 	do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file);
 	do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file);
 	do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file);
 	do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file);
 	if (qdcount == 0 && ancount == 0 &&
 	    nscount == 0 && arcount == 0)
 		putc('\n', file);
 }
 #ifndef MOZILLA_NECKO_EXCLUDE_CODE
 const u_char *
 p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) {
 	char name[MAXDNAME];
 	int n;
 	if ((n = dn_expand(msg, msg + len, cp, name, sizeof name)) < 0)
 		return (NULL);
 	if (name[0] == '\0')
 		putc('.', file);
 	else
 		fputs(name, file);
 	return (cp + n);
 }
 const u_char *
 p_cdname(const u_char *cp, const u_char *msg, FILE *file) {
 	return (p_cdnname(cp, msg, PACKETSZ, file));
 }
 /* Return a fully-qualified domain name from a compressed name (with
    length supplied).  */
 const u_char *
 p_fqnname(cp, msg, msglen, name, namelen)
 	const u_char *cp, *msg;
 	int msglen;
 	char *name;
 	int namelen;
 {
 	int n, newlen;
 	if ((n = dn_expand(msg, cp + msglen, cp, name, namelen)) < 0)
 		return (NULL);
 	newlen = strlen(name);
 	if (newlen == 0 || name[newlen - 1] != '.') {
 		if (newlen + 1 >= namelen)	/* Lack space for final dot */
 			return (NULL);
 		else
 			strcpy(name + newlen, ".");
 	}
 	return (cp + n);
 }
 /* XXX:	the rest of these functions need to become length-limited, too. */
 const u_char *
 p_fqname(const u_char *cp, const u_char *msg, FILE *file) {
 	char name[MAXDNAME];
 	const u_char *n;
 	n = p_fqnname(cp, msg, MAXCDNAME, name, sizeof name);
 	if (n == NULL)
 		return (NULL);
 	fputs(name, file);
 	return (n);
 }
 #endif
 /*
  * Names of RR classes and qclasses.  Classes and qclasses are the same, except
  * that C_ANY is a qclass but not a class.  (You can ask for records of class
  * C_ANY, but you can't have any records of that class in the database.)
  */
 const struct res_sym __p_class_syms[] = {
 	{C_IN,		"IN",		(char *)0},
 	{C_CHAOS,	"CH",		(char *)0},
 	{C_CHAOS,	"CHAOS",	(char *)0},
 	{C_HS,		"HS",		(char *)0},
 	{C_HS,		"HESIOD",	(char *)0},
 	{C_ANY,		"ANY",		(char *)0},
 	{C_NONE,	"NONE",		(char *)0},
 	{C_IN, 		(char *)0,	(char *)0}
 };
 /*
  * Names of message sections.
  */
 const struct res_sym __p_default_section_syms[] = {
 	{ns_s_qd,	"QUERY",	(char *)0},
 	{ns_s_an,	"ANSWER",	(char *)0},
 	{ns_s_ns,	"AUTHORITY",	(char *)0},
 	{ns_s_ar,	"ADDITIONAL",	(char *)0},
 	{0,             (char *)0,	(char *)0}
 };
 const struct res_sym __p_update_section_syms[] = {
 	{S_ZONE,	"ZONE",		(char *)0},
 	{S_PREREQ,	"PREREQUISITE",	(char *)0},
 	{S_UPDATE,	"UPDATE",	(char *)0},
 	{S_ADDT,	"ADDITIONAL",	(char *)0},
 	{0,             (char *)0,	(char *)0}
 };
 const struct res_sym __p_key_syms[] = {
 	{NS_ALG_MD5RSA,		"RSA",		"RSA KEY with MD5 hash"},
 	{NS_ALG_DH,		"DH",		"Diffie Hellman"},
 	{NS_ALG_DSA,		"DSA",		"Digital Signature Algorithm"},
 	{NS_ALG_EXPIRE_ONLY,	"EXPIREONLY",	"No algorithm"},
 	{NS_ALG_PRIVATE_OID,	"PRIVATE",	"Algorithm obtained from OID"},
 	{0,			NULL,		NULL}
 };
 const struct res_sym __p_cert_syms[] = {
 	{cert_t_pkix,	"PKIX",		"PKIX (X.509v3) Certificate"},
 	{cert_t_spki,	"SPKI",		"SPKI certificate"},
 	{cert_t_pgp,	"PGP",		"PGP certificate"},
 	{cert_t_url,	"URL",		"URL Private"},
 	{cert_t_oid,	"OID",		"OID Private"},
 	{0,		NULL,		NULL}
 };
 /*
  * Names of RR types and qtypes.  Types and qtypes are the same, except
  * that T_ANY is a qtype but not a type.  (You can ask for records of type
  * T_ANY, but you can't have any records of that type in the database.)
  */
 const struct res_sym __p_type_syms[] = {
 	{ns_t_a,	"A",		"address"},
 	{ns_t_ns,	"NS",		"name server"},
 	{ns_t_md,	"MD",		"mail destination (deprecated)"},
 	{ns_t_mf,	"MF",		"mail forwarder (deprecated)"},
 	{ns_t_cname,	"CNAME",	"canonical name"},
 	{ns_t_soa,	"SOA",		"start of authority"},
 	{ns_t_mb,	"MB",		"mailbox"},
 	{ns_t_mg,	"MG",		"mail group member"},
 	{ns_t_mr,	"MR",		"mail rename"},
 	{ns_t_null,	"NULL",		"null"},
 	{ns_t_wks,	"WKS",		"well-known service (deprecated)"},
 	{ns_t_ptr,	"PTR",		"domain name pointer"},
 	{ns_t_hinfo,	"HINFO",	"host information"},
 	{ns_t_minfo,	"MINFO",	"mailbox information"},
 	{ns_t_mx,	"MX",		"mail exchanger"},
 	{ns_t_txt,	"TXT",		"text"},
 	{ns_t_rp,	"RP",		"responsible person"},
 	{ns_t_afsdb,	"AFSDB",	"DCE or AFS server"},
 	{ns_t_x25,	"X25",		"X25 address"},
 	{ns_t_isdn,	"ISDN",		"ISDN address"},
 	{ns_t_rt,	"RT",		"router"},
 	{ns_t_nsap,	"NSAP",		"nsap address"},
 	{ns_t_nsap_ptr,	"NSAP_PTR",	"domain name pointer"},
 	{ns_t_sig,	"SIG",		"signature"},
 	{ns_t_key,	"KEY",		"key"},
 	{ns_t_px,	"PX",		"mapping information"},
 	{ns_t_gpos,	"GPOS",		"geographical position (withdrawn)"},
 	{ns_t_aaaa,	"AAAA",		"IPv6 address"},
 	{ns_t_loc,	"LOC",		"location"},
 	{ns_t_nxt,	"NXT",		"next valid name (unimplemented)"},
 	{ns_t_eid,	"EID",		"endpoint identifier (unimplemented)"},
 	{ns_t_nimloc,	"NIMLOC",	"NIMROD locator (unimplemented)"},
 	{ns_t_srv,	"SRV",		"server selection"},
 	{ns_t_atma,	"ATMA",		"ATM address (unimplemented)"},
 	{ns_t_tkey,	"TKEY",		"tkey"},
 	{ns_t_tsig,	"TSIG",		"transaction signature"},
 	{ns_t_ixfr,	"IXFR",		"incremental zone transfer"},
 	{ns_t_axfr,	"AXFR",		"zone transfer"},
 	{ns_t_zxfr,	"ZXFR",		"compressed zone transfer"},
 	{ns_t_mailb,	"MAILB",	"mailbox-related data (deprecated)"},
 	{ns_t_maila,	"MAILA",	"mail agent (deprecated)"},
 	{ns_t_naptr,	"NAPTR",	"URN Naming Authority"},
 	{ns_t_kx,	"KX",		"Key Exchange"},
 	{ns_t_cert,	"CERT",		"Certificate"},
 	{ns_t_a6,	"A6",		"IPv6 Address"},
 	{ns_t_dname,	"DNAME",	"dname"},
 	{ns_t_sink,	"SINK",		"Kitchen Sink (experimental)"},
 	{ns_t_opt,	"OPT",		"EDNS Options"},
 	{ns_t_any,	"ANY",		"\"any\""},
 	{0, 		NULL,		NULL}
 };
 /*
  * Names of DNS rcodes.
  */
 const struct res_sym __p_rcode_syms[] = {
 	{ns_r_noerror,	"NOERROR",		"no error"},
 	{ns_r_formerr,	"FORMERR",		"format error"},
 	{ns_r_servfail,	"SERVFAIL",		"server failed"},
 	{ns_r_nxdomain,	"NXDOMAIN",		"no such domain name"},
 	{ns_r_notimpl,	"NOTIMP",		"not implemented"},
 	{ns_r_refused,	"REFUSED",		"refused"},
 	{ns_r_yxdomain,	"YXDOMAIN",		"domain name exists"},
 	{ns_r_yxrrset,	"YXRRSET",		"rrset exists"},
 	{ns_r_nxrrset,	"NXRRSET",		"rrset doesn't exist"},
 	{ns_r_notauth,	"NOTAUTH",		"not authoritative"},
 	{ns_r_notzone,	"NOTZONE",		"Not in zone"},
 	{ns_r_max,	"",			""},
 	{ns_r_badsig,	"BADSIG",		"bad signature"},
 	{ns_r_badkey,	"BADKEY",		"bad key"},
 	{ns_r_badtime,	"BADTIME",		"bad time"},
 	{0, 		NULL,			NULL}
 };
 int
 sym_ston(const struct res_sym *syms, const char *name, int *success) {
 	for (; syms->name != 0; syms++) {
 		if (strcasecmp (name, syms->name) == 0) {
 			if (success)
 				*success = 1;
 			return (syms->number);
 		}
 	}
 	if (success)
 		*success = 0;
 	return (syms->number);		/* The default value. */
 }
 const char *
 sym_ntos(const struct res_sym *syms, int number, int *success) {
 	static char unname[20];
 	for (; syms->name != 0; syms++) {
 		if (number == syms->number) {
 			if (success)
 				*success = 1;
 			return (syms->name);
 		}
 	}
 	sprintf(unname, "%d", number);		/* XXX nonreentrant */
 	if (success)
 		*success = 0;
 	return (unname);
 }
 const char *
 sym_ntop(const struct res_sym *syms, int number, int *success) {
 	static char unname[20];
 	for (; syms->name != 0; syms++) {
 		if (number == syms->number) {
 			if (success)
 				*success = 1;
 			return (syms->humanname);
 		}
 	}
 	sprintf(unname, "%d", number);		/* XXX nonreentrant */
 	if (success)
 		*success = 0;
 	return (unname);
 }
 /*
  * Return a string for the type.
  */
 const char *
 p_type(int type) {
 	int success;
 	const char *result;
 	static char typebuf[20];
 	result = sym_ntos(__p_type_syms, type, &success);
 	if (success)
 		return (result);
 	if (type < 0 || type > 0xffff)
 		return ("BADTYPE");
 	sprintf(typebuf, "TYPE%d", type);
 	return (typebuf);
 }
 /*
  * Return a string for the type.
  */
 const char *
 p_section(int section, int opcode) {
 	const struct res_sym *symbols;
 	switch (opcode) {
 	case ns_o_update:
 		symbols = __p_update_section_syms;
 		break;
 	default:
 		symbols = __p_default_section_syms;
 		break;
 	}
 	return (sym_ntos(symbols, section, (int *)0));
 }
 /*
  * Return a mnemonic for class.
  */
 const char *
 p_class(int class) {
 	int success;
 	const char *result;
 	static char classbuf[20];
 	result = sym_ntos(__p_class_syms, class, &success);
 	if (success)
 		return (result);
 	if (class < 0 || class > 0xffff)
 		return ("BADCLASS");
 	sprintf(classbuf, "CLASS%d", class);
 	return (classbuf);
 }
 /*
  * Return a mnemonic for an option
  */
 const char *
 p_option(u_long option) {
 	static char nbuf[40];
 	switch (option) {
 	case RES_INIT:		return "init";
 	case RES_DEBUG:		return "debug";
 	case RES_AAONLY:	return "aaonly(unimpl)";
 	case RES_USEVC:		return "usevc";
 	case RES_PRIMARY:	return "primry(unimpl)";
 	case RES_IGNTC:		return "igntc";
 	case RES_RECURSE:	return "recurs";
 	case RES_DEFNAMES:	return "defnam";
 	case RES_STAYOPEN:	return "styopn";
 	case RES_DNSRCH:	return "dnsrch";
 	case RES_INSECURE1:	return "insecure1";
 	case RES_INSECURE2:	return "insecure2";
 	case RES_NOALIASES:	return "noaliases";
 	case RES_USE_INET6:	return "inet6";
 #ifdef RES_USE_EDNS0	/* KAME extension */
 	case RES_USE_EDNS0:	return "edns0";
 #endif
 #ifdef RES_USE_DNAME
 	case RES_USE_DNAME:	return "dname";
 #endif
 #ifdef RES_USE_DNSSEC
 	case RES_USE_DNSSEC:	return "dnssec";
 #endif
 #ifdef RES_NOTLDQUERY
 	case RES_NOTLDQUERY:	return "no-tld-query";
 #endif
 #ifdef RES_NO_NIBBLE2
 	case RES_NO_NIBBLE2:	return "no-nibble2";
 #endif
 				/* XXX nonreentrant */
 	default:		sprintf(nbuf, "?0x%lx?", (u_long)option);
 				return (nbuf);
 	}
 }
 #ifndef MOZILLA_NECKO_EXCLUDE_CODE
 /*
  * Return a mnemonic for a time to live.
  */
 const char *
 p_time(u_int32_t value) {
 	static char nbuf[40];		/* XXX nonreentrant */
 	if (ns_format_ttl((u_long)value, nbuf, sizeof nbuf) < 0)
 		sprintf(nbuf, "%u", value);
 	return (nbuf);
 }
 #endif
 /*
  * Return a string for the rcode.
  */
 const char *
 p_rcode(int rcode) {
 	return (sym_ntos(__p_rcode_syms, rcode, (int *)0));
 }
 #ifndef MOZILLA_NECKO_EXCLUDE_CODE
 /*
  * Return a string for a res_sockaddr_union.
  */
 const char *
 p_sockun(union res_sockaddr_union u, char *buf, size_t size) {
 	char ret[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:123.123.123.123"];
 	switch (u.sin.sin_family) {
 	case AF_INET:
 		inet_ntop(AF_INET, &u.sin.sin_addr, ret, sizeof ret);
 		break;
 #ifdef HAS_INET6_STRUCTS
 	case AF_INET6:
 		inet_ntop(AF_INET6, &u.sin6.sin6_addr, ret, sizeof ret);
 		break;
 #endif
 	default:
 		sprintf(ret, "[af%d]", u.sin.sin_family);
 		break;
 	}
 	if (size > 0U) {
 		strncpy(buf, ret, size - 1);
 		buf[size - 1] = '0';
 	}
 	return (buf);
 }
 #endif
 /*
  * routines to convert between on-the-wire RR format and zone file format.
  * Does not contain conversion to/from decimal degrees; divide or multiply
  * by 60*60*1000 for that.
  */
 static const unsigned int poweroften[10] = {1, 10, 100, 1000, 10000, 100000,
 				      1000000,10000000,100000000,1000000000};
 /* takes an XeY precision/size value, returns a string representation. */
 static const char *
 precsize_ntoa(prec)
 	u_int32_t prec;
 {
 	static char retbuf[sizeof "90000000.00"];	/* XXX nonreentrant */
 	unsigned long val;
 	int mantissa, exponent;
 	mantissa = (int)((prec >> 4) & 0x0f) % 10;
 	exponent = (int)((prec >> 0) & 0x0f) % 10;
 	val = mantissa * poweroften[exponent];
 	(void) sprintf(retbuf, "%lu.%.2lu", val/100, val%100);
 	return (retbuf);
 }
 #ifndef MOZILLA_NECKO_EXCLUDE_CODE
 /* converts ascii size/precision X * 10**Y(cm) to 0xXY.  moves pointer. */
 static u_int8_t
 precsize_aton(const char **strptr) {
 	unsigned int mval = 0, cmval = 0;
 	u_int8_t retval = 0;
 	const char *cp;
 	int exponent;
 	int mantissa;
 	cp = *strptr;
 	while (isdigit((unsigned char)*cp))
 		mval = mval * 10 + (*cp++ - '0');
 	if (*cp == '.') {		/* centimeters */
 		cp++;
 		if (isdigit((unsigned char)*cp)) {
 			cmval = (*cp++ - '0') * 10;
 			if (isdigit((unsigned char)*cp)) {
 				cmval += (*cp++ - '0');
 			}
 		}
 	}
 	cmval = (mval * 100) + cmval;
 	for (exponent = 0; exponent < 9; exponent++)
 		if (cmval < poweroften[exponent+1])
 			break;
 	mantissa = cmval / poweroften[exponent];
 	if (mantissa > 9)
 		mantissa = 9;
 	retval = (mantissa << 4) | exponent;
 	*strptr = cp;
 	return (retval);
 }
 /* converts ascii lat/lon to unsigned encoded 32-bit number.  moves pointer. */
 static u_int32_t
 latlon2ul(const char **latlonstrptr, int *which) {
 	const char *cp;
 	u_int32_t retval;
 	int deg = 0, min = 0, secs = 0, secsfrac = 0;
 	cp = *latlonstrptr;
 	while (isdigit((unsigned char)*cp))
 		deg = deg * 10 + (*cp++ - '0');
 	while (isspace((unsigned char)*cp))
 		cp++;
 	if (!(isdigit((unsigned char)*cp)))
 		goto fndhemi;
 	while (isdigit((unsigned char)*cp))
 		min = min * 10 + (*cp++ - '0');
 	while (isspace((unsigned char)*cp))
 		cp++;
 	if (!(isdigit((unsigned char)*cp)))
 		goto fndhemi;
 	while (isdigit((unsigned char)*cp))
 		secs = secs * 10 + (*cp++ - '0');
 	if (*cp == '.') {		/* decimal seconds */
 		cp++;
 		if (isdigit((unsigned char)*cp)) {
 			secsfrac = (*cp++ - '0') * 100;
 			if (isdigit((unsigned char)*cp)) {
 				secsfrac += (*cp++ - '0') * 10;
 				if (isdigit((unsigned char)*cp)) {
 					secsfrac += (*cp++ - '0');
 				}
 			}
 		}
 	}
 	while (!isspace((unsigned char)*cp))	/* if any trailing garbage */
 		cp++;
 	while (isspace((unsigned char)*cp))
 		cp++;
  fndhemi:
 	switch (*cp) {
 	case 'N': case 'n':
 	case 'E': case 'e':
 		retval = ((unsigned)1<<31)
 			+ (((((deg * 60) + min) * 60) + secs) * 1000)
 			+ secsfrac;
 		break;
 	case 'S': case 's':
 	case 'W': case 'w':
 		retval = ((unsigned)1<<31)
 			- (((((deg * 60) + min) * 60) + secs) * 1000)
 			- secsfrac;
 		break;
 	default:
 		retval = 0;	/* invalid value -- indicates error */
 		break;
 	}
 	switch (*cp) {
 	case 'N': case 'n':
 	case 'S': case 's':
 		*which = 1;	/* latitude */
 		break;
 	case 'E': case 'e':
 	case 'W': case 'w':
 		*which = 2;	/* longitude */
 		break;
 	default:
 		*which = 0;	/* error */
 		break;
 	}
 	cp++;			/* skip the hemisphere */
 	while (!isspace((unsigned char)*cp))	/* if any trailing garbage */
 		cp++;
 	while (isspace((unsigned char)*cp))	/* move to next field */
 		cp++;
 	*latlonstrptr = cp;
 	return (retval);
 }
 /* converts a zone file representation in a string to an RDATA on-the-wire
  * representation. */
 int
 loc_aton(ascii, binary)
 	const char *ascii;
 	u_char *binary;
 {
 	const char *cp, *maxcp;
 	u_char *bcp;
 	u_int32_t latit = 0, longit = 0, alt = 0;
 	u_int32_t lltemp1 = 0, lltemp2 = 0;
 	int altmeters = 0, altfrac = 0, altsign = 1;
 	u_int8_t hp = 0x16;	/* default = 1e6 cm = 10000.00m = 10km */
 	u_int8_t vp = 0x13;	/* default = 1e3 cm = 10.00m */
 	u_int8_t siz = 0x12;	/* default = 1e2 cm = 1.00m */
 	int which1 = 0, which2 = 0;
 	cp = ascii;
 	maxcp = cp + strlen(ascii);
 	lltemp1 = latlon2ul(&cp, &which1);
 	lltemp2 = latlon2ul(&cp, &which2);
 	switch (which1 + which2) {
 	case 3:			/* 1 + 2, the only valid combination */
 		if ((which1 == 1) && (which2 == 2)) { /* normal case */
 			latit = lltemp1;
 			longit = lltemp2;
 		} else if ((which1 == 2) && (which2 == 1)) { /* reversed */
 			longit = lltemp1;
 			latit = lltemp2;
 		} else {	/* some kind of brokenness */
 			return (0);
 		}
 		break;
 	default:		/* we didn't get one of each */
 		return (0);
 	}
 	/* altitude */
 	if (*cp == '-') {
 		altsign = -1;
 		cp++;
 	}
 	if (*cp == '+')
 		cp++;
 	while (isdigit((unsigned char)*cp))
 		altmeters = altmeters * 10 + (*cp++ - '0');
 	if (*cp == '.') {		/* decimal meters */
 		cp++;
 		if (isdigit((unsigned char)*cp)) {
 			altfrac = (*cp++ - '0') * 10;
 			if (isdigit((unsigned char)*cp)) {
 				altfrac += (*cp++ - '0');
 			}
 		}
 	}
 	alt = (10000000 + (altsign * (altmeters * 100 + altfrac)));
 	while (!isspace((unsigned char)*cp) && (cp < maxcp)) /* if trailing garbage or m */
 		cp++;
 	while (isspace((unsigned char)*cp) && (cp < maxcp))
 		cp++;
 	if (cp >= maxcp)
 		goto defaults;
 	siz = precsize_aton(&cp);
 	while (!isspace((unsigned char)*cp) && (cp < maxcp))	/* if trailing garbage or m */
 		cp++;
 	while (isspace((unsigned char)*cp) && (cp < maxcp))
 		cp++;
 	if (cp >= maxcp)
 		goto defaults;
 	hp = precsize_aton(&cp);
 	while (!isspace((unsigned char)*cp) && (cp < maxcp))	/* if trailing garbage or m */
 		cp++;
 	while (isspace((unsigned char)*cp) && (cp < maxcp))
 		cp++;
 	if (cp >= maxcp)
 		goto defaults;
 	vp = precsize_aton(&cp);
  defaults:
 	bcp = binary;
 	*bcp++ = (u_int8_t) 0;	/* version byte */
 	*bcp++ = siz;
 	*bcp++ = hp;
 	*bcp++ = vp;
 	PUTLONG(latit,bcp);
 	PUTLONG(longit,bcp);
 	PUTLONG(alt,bcp);
 	return (16);		/* size of RR in octets */
 }
 #endif
 /* takes an on-the-wire LOC RR and formats it in a human readable format. */
 const char *
 loc_ntoa(binary, ascii)
 	const u_char *binary;
 	char *ascii;
 {
 	static const char *error = "?";
 	static char tmpbuf[sizeof
 "1000 60 60.000 N 1000 60 60.000 W -12345678.00m 90000000.00m 90000000.00m 90000000.00m"];
 	const u_char *cp = binary;
 	int latdeg, latmin, latsec, latsecfrac;
 	int longdeg, longmin, longsec, longsecfrac;
 	char northsouth, eastwest;
 	const char *altsign;
 	int altmeters, altfrac;
 	const u_int32_t referencealt = 100000 * 100;
 	int32_t latval, longval, altval;
 	u_int32_t templ;
 	u_int8_t sizeval, hpval, vpval, versionval;
 	char *sizestr, *hpstr, *vpstr;
 	versionval = *cp++;
 	if (ascii == NULL)
 		ascii = tmpbuf;
 	if (versionval) {
 		(void) sprintf(ascii, "; error: unknown LOC RR version");
 		return (ascii);
 	}
 	sizeval = *cp++;
 	hpval = *cp++;
 	vpval = *cp++;
 	GETLONG(templ, cp);
 	latval = (templ - ((unsigned)1<<31));
 	GETLONG(templ, cp);
 	longval = (templ - ((unsigned)1<<31));
 	GETLONG(templ, cp);
 	if (templ < referencealt) { /* below WGS 84 spheroid */
 		altval = referencealt - templ;
 		altsign = "-";
 	} else {
 		altval = templ - referencealt;
 		altsign = "";
 	}
 	if (latval < 0) {
 		northsouth = 'S';
 		latval = -latval;
 	} else
 		northsouth = 'N';
 	latsecfrac = latval % 1000;
 	latval = latval / 1000;
 	latsec = latval % 60;
 	latval = latval / 60;
 	latmin = latval % 60;
 	latval = latval / 60;
 	latdeg = latval;
 	if (longval < 0) {
 		eastwest = 'W';
 		longval = -longval;
 	} else
 		eastwest = 'E';
 	longsecfrac = longval % 1000;
 	longval = longval / 1000;
 	longsec = longval % 60;
 	longval = longval / 60;
 	longmin = longval % 60;
 	longval = longval / 60;
 	longdeg = longval;
 	altfrac = altval % 100;
 	altmeters = (altval / 100);
 	sizestr = strdup(precsize_ntoa((u_int32_t)sizeval));
 	hpstr = strdup(precsize_ntoa((u_int32_t)hpval));
 	vpstr = strdup(precsize_ntoa((u_int32_t)vpval));
 	sprintf(ascii,
 	    "%d %.2d %.2d.%.3d %c %d %.2d %.2d.%.3d %c %s%d.%.2dm %sm %sm %sm",
 		latdeg, latmin, latsec, latsecfrac, northsouth,
 		longdeg, longmin, longsec, longsecfrac, eastwest,
 		altsign, altmeters, altfrac,
 		(sizestr != NULL) ? sizestr : error,
 		(hpstr != NULL) ? hpstr : error,
 		(vpstr != NULL) ? vpstr : error);
 	if (sizestr != NULL)
 		free(sizestr);
 	if (hpstr != NULL)
 		free(hpstr);
 	if (vpstr != NULL)
 		free(vpstr);
 	return (ascii);
 }
 /* Return the number of DNS hierarchy levels in the name. */
 int
 dn_count_labels(const char *name) {
 	int i, len, count;
 	len = strlen(name);
 	for (i = 0, count = 0; i < len; i++) {
 		/* XXX need to check for \. or use named's nlabels(). */
 		if (name[i] == '.')
 			count++;
 	}
 	/* don't count initial wildcard */
 	if (name[0] == '*')
 		if (count)
 			count--;
 	/* don't count the null label for root. */
 	/* if terminating '.' not found, must adjust */
 	/* count to include last label */
 	if (len > 0 && name[len-1] != '.')
 		count++;
 	return (count);
 }
 /*
  * Make dates expressed in seconds-since-Jan-1-1970 easy to read.
  * SIG records are required to be printed like this, by the Secure DNS RFC.
  */
 char *
 p_secstodate (u_long secs) {
 	/* XXX nonreentrant */
 	static char output[15];		/* YYYYMMDDHHMMSS and null */
 	time_t myclock = secs;
 	struct tm *mytime;
 #ifdef HAVE_TIME_R
 	struct tm res;
 	mytime = gmtime_r(&myclock, &res);
 #else
 	mytime = gmtime(&myclock);
 #endif
 	mytime->tm_year += 1900;
 	mytime->tm_mon += 1;
 	sprintf(output, "%04d%02d%02d%02d%02d%02d",
 		mytime->tm_year, mytime->tm_mon, mytime->tm_mday,
 		mytime->tm_hour, mytime->tm_min, mytime->tm_sec);
 	return (output);
 }
 #ifndef MOZILLA_NECKO_EXCLUDE_CODE
 u_int16_t
 res_nametoclass(const char *buf, int *successp) {
 	unsigned long result;
 	char *endptr;
 	int success;
 	result = sym_ston(__p_class_syms, buf, &success);
 	if (success)
 		goto done;
 	if (strncasecmp(buf, "CLASS", 5) != 0 ||
 	    !isdigit((unsigned char)buf[5]))
 		goto done;
 	errno = 0;
 	result = strtoul(buf + 5, &endptr, 10);
 	if (errno == 0 && *endptr == '\0' && result <= 0xffffU)
 		success = 1;
  done:
 	if (successp)
 		*successp = success;
 	return (u_int16_t)(result);
 }
 u_int16_t
 res_nametotype(const char *buf, int *successp) {
 	unsigned long result;
 	char *endptr;
 	int success;
 	result = sym_ston(__p_type_syms, buf, &success);
 	if (success)
 		goto done;
 	if (strncasecmp(buf, "type", 4) != 0 ||
 	    !isdigit((unsigned char)buf[4]))
 		goto done;
 	errno = 0;
 	result = strtoul(buf + 4, &endptr, 10);
 	if (errno == 0 && *endptr == '\0' && result <= 0xffffU)
 		success = 1;
  done:
 	if (successp)
 		*successp = success;
 	return (u_int16_t)(result);
 }
 #endif

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