/*

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* Copyright (c) 1983, 1989, 1993

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* The Regents of the University of California. All rights reserved.

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*

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* Redistribution and use in source and binary forms, with or without

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* modification, are permitted provided that the following conditions

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* are met:

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* 1. Redistributions of source code must retain the above copyright

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* notice, this list of conditions and the following disclaimer.

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* 2. Redistributions in binary form must reproduce the above copyright

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* notice, this list of conditions and the following disclaimer in the

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* documentation and/or other materials provided with the distribution.

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* 4. Neither the name of the University nor the names of its contributors

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* may be used to endorse or promote products derived from this software

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* without specific prior written permission.

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*

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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

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* SUCH DAMAGE.

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*/

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/*

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* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")

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* Copyright (c) 1996-1999 by Internet Software Consortium.

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*

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* Permission to use, copy, modify, and distribute this software for any

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* purpose with or without fee is hereby granted, provided that the above

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* copyright notice and this permission notice appear in all copies.

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*

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* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS

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* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES

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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE

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* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL

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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR

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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS

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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS

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* SOFTWARE.

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*/

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#ifndef _ARPA_NAMESER_H_

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#define _ARPA_NAMESER_H_

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#include <sys/param.h>

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#include <sys/types.h>

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#include <stdint.h>

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/*

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* Define constants based on RFC 883, RFC 1034, RFC 1035

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*/

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#define NS_PACKETSZ 512 /*%< default UDP packet size */

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#define NS_MAXDNAME 1025 /*%< maximum domain name */

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#define NS_MAXMSG 65535 /*%< maximum message size */

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#define NS_MAXCDNAME 255 /*%< maximum compressed domain name */

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#define NS_MAXLABEL 63 /*%< maximum length of domain label */

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#define NS_HFIXEDSZ 12 /*%< #/bytes of fixed data in header */

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#define NS_QFIXEDSZ 4 /*%< #/bytes of fixed data in query */

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#define NS_RRFIXEDSZ 10 /*%< #/bytes of fixed data in r record */

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#define NS_INT32SZ 4 /*%< #/bytes of data in a uint32_t */

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#define NS_INT16SZ 2 /*%< #/bytes of data in a uint16_t */

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#define NS_INT8SZ 1 /*%< #/bytes of data in a uint8_t */

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#define NS_INADDRSZ 4 /*%< IPv4 T_A */

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#define NS_IN6ADDRSZ 16 /*%< IPv6 T_AAAA */

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#define NS_CMPRSFLGS 0xc0 /*%< Flag bits indicating name compression. */

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#define NS_DEFAULTPORT 53 /*%< For both TCP and UDP. */

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/*

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* These can be expanded with synonyms, just keep ns_parse.c:ns_parserecord()

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* in synch with it.

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*/

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typedef enum __ns_sect {

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ns_s_qd = 0, /*%< Query: Question. */

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ns_s_zn = 0, /*%< Update: Zone. */

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ns_s_an = 1, /*%< Query: Answer. */

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ns_s_pr = 1, /*%< Update: Prerequisites. */

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ns_s_ns = 2, /*%< Query: Name servers. */

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ns_s_ud = 2, /*%< Update: Update. */

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ns_s_ar = 3, /*%< Query|Update: Additional records. */

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ns_s_max = 4

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} ns_sect;

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/*%

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* This is a message handle. It is caller allocated and has no dynamic data.

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* This structure is intended to be opaque to all but ns_parse.c, thus the

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* leading _'s on the member names. Use the accessor functions, not the _'s.

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*/

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typedef struct __ns_msg {

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const unsigned char *_msg, *_eom;

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uint16_t _id, _flags, _counts[ns_s_max];

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const unsigned char *_sections[ns_s_max];

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ns_sect _sect;

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int _rrnum;

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const unsigned char *_msg_ptr;

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} ns_msg;

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/* Private data structure - do not use from outside library. */

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struct _ns_flagdata { int mask, shift; };

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extern const struct _ns_flagdata _ns_flagdata[];

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/* Accessor macros - this is part of the public interface. */

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#define ns_msg_id(handle) ((handle)._id + 0)

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#define ns_msg_base(handle) ((handle)._msg + 0)

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#define ns_msg_end(handle) ((handle)._eom + 0)

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#define ns_msg_size(handle) ((handle)._eom - (handle)._msg)

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#define ns_msg_count(handle, section) ((handle)._counts[section] + 0)

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/*%

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* This is a parsed record. It is caller allocated and has no dynamic data.

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*/

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typedef struct __ns_rr {

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char name[NS_MAXDNAME];

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uint16_t type;

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uint16_t rr_class;

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uint32_t ttl;

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uint16_t rdlength;

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const unsigned char * rdata;

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} ns_rr;

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/* Accessor macros - this is part of the public interface. */

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#define ns_rr_name(rr) (((rr).name[0] != '\0') ? (rr).name : ".")

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#define ns_rr_type(rr) ((ns_type)((rr).type + 0))

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#define ns_rr_class(rr) ((ns_class)((rr).rr_class + 0))

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#define ns_rr_ttl(rr) ((rr).ttl + 0)

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#define ns_rr_rdlen(rr) ((rr).rdlength + 0)

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#define ns_rr_rdata(rr) ((rr).rdata + 0)

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/*%

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* These don't have to be in the same order as in the packet flags word,

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* and they can even overlap in some cases, but they will need to be kept

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* in synch with ns_parse.c:ns_flagdata[].

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*/

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typedef enum __ns_flag {

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ns_f_qr, /*%< Question/Response. */

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ns_f_opcode, /*%< Operation code. */

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ns_f_aa, /*%< Authoritative Answer. */

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ns_f_tc, /*%< Truncation occurred. */

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ns_f_rd, /*%< Recursion Desired. */

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ns_f_ra, /*%< Recursion Available. */

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ns_f_z, /*%< MBZ. */

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ns_f_ad, /*%< Authentic Data (DNSSEC). */

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ns_f_cd, /*%< Checking Disabled (DNSSEC). */

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ns_f_rcode, /*%< Response code. */

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ns_f_max

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} ns_flag;

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/*%

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* Currently defined opcodes.

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*/

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typedef enum __ns_opcode {

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ns_o_query = 0, /*%< Standard query. */

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ns_o_iquery = 1, /*%< Inverse query (deprecated/unsupported). */

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ns_o_status = 2, /*%< Name server status query (unsupported). */

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/* Opcode 3 is undefined/reserved. */

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ns_o_notify = 4, /*%< Zone change notification. */

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ns_o_update = 5, /*%< Zone update message. */

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ns_o_max = 6

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} ns_opcode;

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/*%

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* Currently defined response codes.

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*/

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typedef enum __ns_rcode {

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ns_r_noerror = 0, /*%< No error occurred. */

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ns_r_formerr = 1, /*%< Format error. */

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ns_r_servfail = 2, /*%< Server failure. */

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ns_r_nxdomain = 3, /*%< Name error. */

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ns_r_notimpl = 4, /*%< Unimplemented. */

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ns_r_refused = 5, /*%< Operation refused. */

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/* these are for BIND_UPDATE */

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ns_r_yxdomain = 6, /*%< Name exists */

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ns_r_yxrrset = 7, /*%< RRset exists */

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ns_r_nxrrset = 8, /*%< RRset does not exist */

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ns_r_notauth = 9, /*%< Not authoritative for zone */

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ns_r_notzone = 10, /*%< Zone of record different from zone section */

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ns_r_max = 11,

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/* The following are EDNS extended rcodes */

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ns_r_badvers = 16,

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/* The following are TSIG errors */

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ns_r_badsig = 16,

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ns_r_badkey = 17,

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ns_r_badtime = 18

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} ns_rcode;

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/* BIND_UPDATE */

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typedef enum __ns_update_operation {

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ns_uop_delete = 0,

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ns_uop_add = 1,

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ns_uop_max = 2

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} ns_update_operation;

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/*%

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* This structure is used for TSIG authenticated messages

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*/

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struct ns_tsig_key {

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char name[NS_MAXDNAME], alg[NS_MAXDNAME];

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unsigned char *data;

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int len;

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};

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typedef struct ns_tsig_key ns_tsig_key;

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/*%

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* This structure is used for TSIG authenticated TCP messages

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*/

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struct ns_tcp_tsig_state {

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int counter;

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struct dst_key *key;

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void *ctx;

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unsigned char sig[NS_PACKETSZ];

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int siglen;

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};

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typedef struct ns_tcp_tsig_state ns_tcp_tsig_state;

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#define NS_TSIG_FUDGE 300

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#define NS_TSIG_TCP_COUNT 100

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#define NS_TSIG_ALG_HMAC_MD5 "HMAC-MD5.SIG-ALG.REG.INT"

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#define NS_TSIG_ERROR_NO_TSIG -10

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#define NS_TSIG_ERROR_NO_SPACE -11

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#define NS_TSIG_ERROR_FORMERR -12

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/*%

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* Currently defined type values for resources and queries.

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*/

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typedef enum __ns_type

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{

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ns_t_invalid = 0,

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ns_t_a = 1,

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ns_t_ns = 2,

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ns_t_md = 3,

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ns_t_mf = 4,

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ns_t_cname = 5,

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ns_t_soa = 6,

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ns_t_mb = 7,

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ns_t_mg = 8,

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ns_t_mr = 9,

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ns_t_null = 10,

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ns_t_wks = 11,

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ns_t_ptr = 12,

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ns_t_hinfo = 13,

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ns_t_minfo = 14,

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ns_t_mx = 15,

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ns_t_txt = 16,

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ns_t_rp = 17,

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ns_t_afsdb = 18,

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ns_t_x25 = 19,

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ns_t_isdn = 20,

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ns_t_rt = 21,

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ns_t_nsap = 22,

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ns_t_nsap_ptr = 23,

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ns_t_sig = 24,

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ns_t_key = 25,

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ns_t_px = 26,

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ns_t_gpos = 27,

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ns_t_aaaa = 28,

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ns_t_loc = 29,

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ns_t_nxt = 30,

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ns_t_eid = 31,

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ns_t_nimloc = 32,

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ns_t_srv = 33,

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ns_t_atma = 34,

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ns_t_naptr = 35,

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ns_t_kx = 36,

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ns_t_cert = 37,

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ns_t_a6 = 38,

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ns_t_dname = 39,

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ns_t_sink = 40,

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ns_t_opt = 41,

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ns_t_apl = 42,

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ns_t_ds = 43,

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ns_t_sshfp = 44,

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ns_t_ipseckey = 45,

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ns_t_rrsig = 46,

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ns_t_nsec = 47,

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ns_t_dnskey = 48,

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ns_t_dhcid = 49,

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ns_t_nsec3 = 50,

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ns_t_nsec3param = 51,

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ns_t_tlsa = 52,

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ns_t_smimea = 53,

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ns_t_hip = 55,

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ns_t_ninfo = 56,

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ns_t_rkey = 57,

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ns_t_talink = 58,

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ns_t_cds = 59,

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ns_t_cdnskey = 60,

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ns_t_openpgpkey = 61,

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ns_t_csync = 62,

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ns_t_spf = 99,

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ns_t_uinfo = 100,

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ns_t_uid = 101,

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ns_t_gid = 102,

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ns_t_unspec = 103,

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ns_t_nid = 104,

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ns_t_l32 = 105,

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ns_t_l64 = 106,

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ns_t_lp = 107,

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ns_t_eui48 = 108,

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ns_t_eui64 = 109,

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ns_t_tkey = 249,

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ns_t_tsig = 250,

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ns_t_ixfr = 251,

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ns_t_axfr = 252,

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ns_t_mailb = 253,

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ns_t_maila = 254,

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ns_t_any = 255,

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ns_t_uri = 256,

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ns_t_caa = 257,

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ns_t_avc = 258,

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ns_t_ta = 32768,

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ns_t_dlv = 32769,

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ns_t_max = 65536

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} ns_type;

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/*%

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* Values for class field

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*/

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typedef enum __ns_class {

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ns_c_invalid = 0, /*%< Cookie. */

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ns_c_in = 1, /*%< Internet. */

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ns_c_2 = 2, /*%< unallocated/unsupported. */

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ns_c_chaos = 3, /*%< MIT Chaos-net. */

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ns_c_hs = 4, /*%< MIT Hesiod. */

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/* Query class values which do not appear in resource records */

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ns_c_none = 254, /*%< for prereq. sections in update requests */

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ns_c_any = 255, /*%< Wildcard match. */

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ns_c_max = 65536

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} ns_class;

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/* Certificate type values in CERT resource records. */

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typedef enum __ns_cert_types {

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cert_t_pkix = 1, /*%< PKIX (X.509v3) */

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cert_t_spki = 2, /*%< SPKI */

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cert_t_pgp = 3, /*%< PGP */

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cert_t_url = 253, /*%< URL private type */

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cert_t_oid = 254 /*%< OID private type */

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} ns_cert_types;

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/*%

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* EDNS0 extended flags and option codes, host order.

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*/

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#define NS_OPT_DNSSEC_OK 0x8000U

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#define NS_OPT_NSID 3

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/*%

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* Inline versions of get/put short/long. Pointer is advanced.

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*/

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#define NS_GET16(s, cp) do { \

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const unsigned char *t_cp = (const unsigned char *)(cp); \

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(s) = ((uint16_t)t_cp[0] << 8) \

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| ((uint16_t)t_cp[1]) \

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; \

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(cp) += NS_INT16SZ; \

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} while (0)

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#define NS_GET32(l, cp) do { \

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const unsigned char *t_cp = (const unsigned char *)(cp); \

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(l) = ((uint32_t)t_cp[0] << 24) \

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| ((uint32_t)t_cp[1] << 16) \

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| ((uint32_t)t_cp[2] << 8) \

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| ((uint32_t)t_cp[3]) \

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; \

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(cp) += NS_INT32SZ; \

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} while (0)

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#define NS_PUT16(s, cp) do { \

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uint16_t t_s = (uint16_t)(s); \

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unsigned char *t_cp = (unsigned char *)(cp); \

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*t_cp++ = t_s >> 8; \

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*t_cp = t_s; \

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(cp) += NS_INT16SZ; \

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} while (0)

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#define NS_PUT32(l, cp) do { \

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uint32_t t_l = (uint32_t)(l); \

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unsigned char *t_cp = (unsigned char *)(cp); \

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*t_cp++ = t_l >> 24; \

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*t_cp++ = t_l >> 16; \

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*t_cp++ = t_l >> 8; \

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*t_cp = t_l; \

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(cp) += NS_INT32SZ; \

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} while (0)

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__BEGIN_DECLS

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int ns_msg_getflag (ns_msg, int) __THROW;

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unsigned int ns_get16 (const unsigned char *) __THROW;

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unsigned long ns_get32 (const unsigned char *) __THROW;

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void ns_put16 (unsigned int, unsigned char *) __THROW;

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void ns_put32 (unsigned long, unsigned char *) __THROW;

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int ns_initparse (const unsigned char *, int, ns_msg *) __THROW;

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int ns_skiprr (const unsigned char *, const unsigned char *,

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ns_sect, int) __THROW;

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int ns_parserr (ns_msg *, ns_sect, int, ns_rr *) __THROW;

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int ns_sprintrr (const ns_msg *, const ns_rr *,

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const char *, const char *, char *, size_t)

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__THROW;

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int ns_sprintrrf (const unsigned char *, size_t, const char *,

[404] Fix | Delete

ns_class, ns_type, unsigned long,

[405] Fix | Delete

const unsigned char *, size_t, const char *,

[406] Fix | Delete

const char *, char *, size_t) __THROW;

[407] Fix | Delete

int ns_format_ttl (unsigned long, char *, size_t) __THROW;

[408] Fix | Delete

int ns_parse_ttl (const char *, unsigned long *) __THROW;

[409] Fix | Delete

uint32_t ns_datetosecs (const char *, int *) __THROW;

[410] Fix | Delete

int ns_name_ntol (const unsigned char *, unsigned char *, size_t)

[411] Fix | Delete

__THROW;

[412] Fix | Delete

int ns_name_ntop (const unsigned char *, char *, size_t) __THROW;

[413] Fix | Delete

int ns_name_pton (const char *, unsigned char *, size_t) __THROW;

[414] Fix | Delete

int ns_name_unpack (const unsigned char *, const unsigned char *,

[415] Fix | Delete

const unsigned char *, unsigned char *, size_t)

[416] Fix | Delete

__THROW;

[417] Fix | Delete

int ns_name_pack (const unsigned char *, unsigned char *, int,

[418] Fix | Delete

const unsigned char **, const unsigned char **)

[419] Fix | Delete

__THROW;

[420] Fix | Delete

int ns_name_uncompress (const unsigned char *,

[421] Fix | Delete

const unsigned char *,

[422] Fix | Delete

const unsigned char *,

[423] Fix | Delete

char *, size_t) __THROW;

[424] Fix | Delete

int ns_name_compress (const char *, unsigned char *, size_t,

[425] Fix | Delete

const unsigned char **,

[426] Fix | Delete

const unsigned char **) __THROW;

[427] Fix | Delete

int ns_name_skip (const unsigned char **, const unsigned char *)

[428] Fix | Delete

__THROW;

[429] Fix | Delete

void ns_name_rollback (const unsigned char *,

[430] Fix | Delete

const unsigned char **,

[431] Fix | Delete

const unsigned char **) __THROW;

[432] Fix | Delete

int ns_samedomain (const char *, const char *) __THROW;

[433] Fix | Delete

int ns_subdomain (const char *, const char *) __THROW;

[434] Fix | Delete

int ns_makecanon (const char *, char *, size_t) __THROW;

[435] Fix | Delete

int ns_samename (const char *, const char *) __THROW;

[436] Fix | Delete

__END_DECLS

[437] Fix | Delete

[438] Fix | Delete

#include <arpa/nameser_compat.h>

[439] Fix | Delete

[440] Fix | Delete

#endif /* !_ARPA_NAMESER_H_ */

[441] Fix | Delete

/*! \file */

[442] Fix | Delete

[443] Fix | Delete