includes/arpa/nameser.h

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00001 /*
00002  * Copyright (c) 1983, 1989, 1993
00003  *    The Regents of the University of California.  All rights reserved.
00004  * 
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  * 1. Redistributions of source code must retain the above copyright
00009  *    notice, this list of conditions and the following disclaimer.
00010  * 2. Redistributions in binary form must reproduce the above copyright
00011  *    notice, this list of conditions and the following disclaimer in the
00012  *    documentation and/or other materials provided with the distribution.
00013  * 3. Neither the name of the University nor the names of its contributors
00014  *    may be used to endorse or promote products derived from this software
00015  *    without specific prior written permission.
00016  * 
00017  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
00018  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00019  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00020  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
00021  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00022  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
00023  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00024  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00025  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
00026  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00027  * SUCH DAMAGE.
00028  */
00029 
00030 /*
00031  * Copyright (c) 2004,2009 by Internet Systems Consortium, Inc. ("ISC")
00032  * Copyright (c) 1996-2003 by Internet Software Consortium
00033  *
00034  * Permission to use, copy, modify, and distribute this software for any
00035  * purpose with or without fee is hereby granted, provided that the above
00036  * copyright notice and this permission notice appear in all copies.
00037  *
00038  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
00039  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
00040  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
00041  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
00042  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
00043  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
00044  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
00045  *
00046  *   Internet Systems Consortium, Inc.
00047  *   950 Charter Street
00048  *   Redwood City, CA 94063
00049  *   <info@isc.org>
00050  *   https://www.isc.org/
00051  */
00052 
00053 /*
00054  *      $Id: nameser.h,v 1.7 2009/11/24 02:06:56 sar Exp $
00055  */
00056 
00057 #ifndef _ARPA_NAMESER_H_
00058 #define _ARPA_NAMESER_H_
00059 
00060 /*
00061  * Revision information.  This is the release date in YYYYMMDD format.
00062  * It can change every day so the right thing to do with it is use it
00063  * in preprocessor commands such as "#if (__NAMESER > 19931104)".  Do not
00064  * compare for equality; rather, use it to determine whether your libbind.a
00065  * contains a new enough lib/nameser/ to support the feature you need.
00066  */
00067 
00068 #define __NAMESER       19991006        /* New interface version stamp. */
00069 
00070 /*
00071  * Define constants based on RFC 883, RFC 1034, RFC 1035
00072  */
00073 #define NS_PACKETSZ     512     /* maximum packet size */
00074 #define NS_MAXDNAME     1025    /* maximum domain name */
00075 #define NS_MAXCDNAME    255     /* maximum compressed domain name */
00076 #define NS_MAXLABEL     63      /* maximum length of domain label */
00077 #define NS_HFIXEDSZ     12      /* #/bytes of fixed data in header */
00078 #define NS_QFIXEDSZ     4       /* #/bytes of fixed data in query */
00079 #define NS_RRFIXEDSZ    10      /* #/bytes of fixed data in r record */
00080 #define NS_INT32SZ      4       /* #/bytes of data in a u_int32_t */
00081 #define NS_INT16SZ      2       /* #/bytes of data in a u_int16_t */
00082 #define NS_INT8SZ       1       /* #/bytes of data in a u_int8_t */
00083 #define NS_INADDRSZ     4       /* IPv4 T_A */
00084 #define NS_IN6ADDRSZ    16      /* IPv6 T_AAAA */
00085 #define NS_CMPRSFLGS    0xc0    /* Flag bits indicating name compression. */
00086 #define NS_DEFAULTPORT  53      /* For both TCP and UDP. */
00087 
00088 /*
00089  * These can be expanded with synonyms, just keep ns_parse.c:ns_parserecord()
00090  * in synch with it.
00091  */
00092 typedef enum __ns_sect {
00093         ns_s_qd = 0,            /* Query: Question. */
00094         ns_s_zn = 0,            /* Update: Zone. */
00095         ns_s_an = 1,            /* Query: Answer. */
00096         ns_s_pr = 1,            /* Update: Prerequisites. */
00097         ns_s_ns = 2,            /* Query: Name servers. */
00098         ns_s_ud = 2,            /* Update: Update. */
00099         ns_s_ar = 3,            /* Query|Update: Additional records. */
00100         ns_s_max = 4
00101 } ns_sect;
00102 
00103 /*
00104  * This is a message handle.  It is caller allocated and has no dynamic data.
00105  * This structure is intended to be opaque to all but ns_parse.c, thus the
00106  * leading _'s on the member names.  Use the accessor functions, not the _'s.
00107  */
00108 typedef struct __ns_msg {
00109         const u_int8_t  *_msg, *_eom;
00110         u_int16_t       _id, _flags, _counts[ns_s_max];
00111         const u_int8_t  *_sections[ns_s_max];
00112         ns_sect         _sect;
00113         int             _rrnum;
00114         const u_int8_t  *_ptr;
00115 } ns_msg;
00116 
00117 /* Private data structure - do not use from outside library. */
00118 struct _ns_flagdata {  int mask, shift;  };
00119 extern struct _ns_flagdata _ns_flagdata[];
00120 
00121 /* Accessor macros - this is part of the public interface. */
00122 #define ns_msg_getflag(handle, flag) ( \
00123                         ((handle)._flags & _ns_flagdata[flag].mask) \
00124                          >> _ns_flagdata[flag].shift \
00125                         )
00126 #define ns_msg_id(handle) ((handle)._id + 0)
00127 #define ns_msg_base(handle) ((handle)._msg + 0)
00128 #define ns_msg_end(handle) ((handle)._eom + 0)
00129 #define ns_msg_size(handle) ((handle)._eom - (handle)._msg)
00130 #define ns_msg_count(handle, section) ((handle)._counts[section] + 0)
00131 
00132 /*
00133  * This is a parsed record.  It is caller allocated and has no dynamic data.
00134  */
00135 typedef struct __ns_rr {
00136         char            name[NS_MAXDNAME];
00137         u_int16_t       type;
00138         u_int16_t       rr_class;
00139         u_int32_t       ttl;
00140         u_int16_t       rdlength;
00141         const u_int8_t *rdata;
00142 } ns_rr;
00143 
00144 /* Accessor macros - this is part of the public interface. */
00145 #define ns_rr_name(rr)  (((rr).name[0] != '\0') ? (rr).name : ".")
00146 #define ns_rr_type(rr)  ((ns_type)((rr).type + 0))
00147 #define ns_rr_class(rr) ((ns_class)((rr).rr_class + 0))
00148 #define ns_rr_ttl(rr)   ((rr).ttl + 0)
00149 #define ns_rr_rdlen(rr) ((rr).rdlength + 0)
00150 #define ns_rr_rdata(rr) ((rr).rdata + 0)
00151 
00152 /*
00153  * These don't have to be in the same order as in the packet flags word,
00154  * and they can even overlap in some cases, but they will need to be kept
00155  * in synch with ns_parse.c:ns_flagdata[].
00156  */
00157 typedef enum __ns_flag {
00158         ns_f_qr,                /* Question/Response. */
00159         ns_f_opcode,            /* Operation code. */
00160         ns_f_aa,                /* Authoritative Answer. */
00161         ns_f_tc,                /* Truncation occurred. */
00162         ns_f_rd,                /* Recursion Desired. */
00163         ns_f_ra,                /* Recursion Available. */
00164         ns_f_z,                 /* MBZ. */
00165         ns_f_ad,                /* Authentic Data (DNSSEC). */
00166         ns_f_cd,                /* Checking Disabled (DNSSEC). */
00167         ns_f_rcode,             /* Response code. */
00168         ns_f_max
00169 } ns_flag;
00170 
00171 /*
00172  * Currently defined opcodes.
00173  */
00174 typedef enum __ns_opcode {
00175         ns_o_query = 0,         /* Standard query. */
00176         ns_o_iquery = 1,        /* Inverse query (deprecated/unsupported). */
00177         ns_o_status = 2,        /* Name server status query (unsupported). */
00178                                 /* Opcode 3 is undefined/reserved. */
00179         ns_o_notify = 4,        /* Zone change notification. */
00180         ns_o_update = 5,        /* Zone update message. */
00181         ns_o_max = 6
00182 } ns_opcode;
00183 
00184 /*
00185  * Currently defined response codes.
00186  */
00187 typedef enum __ns_rcode {
00188         ns_r_noerror = 0,       /* No error occurred. */
00189         ns_r_formerr = 1,       /* Format error. */
00190         ns_r_servfail = 2,      /* Server failure. */
00191         ns_r_nxdomain = 3,      /* Name error. */
00192         ns_r_notimpl = 4,       /* Unimplemented. */
00193         ns_r_refused = 5,       /* Operation refused. */
00194         /* these are for BIND_UPDATE */
00195         ns_r_yxdomain = 6,      /* Name exists */
00196         ns_r_yxrrset = 7,       /* RRset exists */
00197         ns_r_nxrrset = 8,       /* RRset does not exist */
00198         ns_r_notauth = 9,       /* Not authoritative for zone */
00199         ns_r_notzone = 10,      /* Zone of record different from zone section */
00200         ns_r_max = 11,
00201         /* The following are TSIG extended errors */
00202         ns_r_badsig = 16,
00203         ns_r_badkey = 17,
00204         ns_r_badtime = 18
00205 } ns_rcode;
00206 
00207 /* BIND_UPDATE */
00208 typedef enum __ns_update_operation {
00209         ns_uop_delete = 0,
00210         ns_uop_add = 1,
00211         ns_uop_max = 2
00212 } ns_update_operation;
00213 
00214 /*
00215  * This structure is used for TSIG authenticated messages
00216  */
00217 struct ns_tsig_key {
00218         char name[NS_MAXDNAME], alg[NS_MAXDNAME];
00219         unsigned char *data;
00220         unsigned len;
00221 };
00222 typedef struct ns_tsig_key ns_tsig_key;
00223 
00224 /*
00225  * This structure is used for TSIG authenticated TCP messages
00226  */
00227 struct ns_tcp_tsig_state {
00228         int counter;
00229         struct dst_key *key;
00230         void *ctx;
00231         unsigned char sig[NS_PACKETSZ];
00232         unsigned siglen;
00233 };
00234 typedef struct ns_tcp_tsig_state ns_tcp_tsig_state;
00235 
00236 #define NS_TSIG_FUDGE 300
00237 #define NS_TSIG_TCP_COUNT 100
00238 #define NS_TSIG_ALG_HMAC_MD5 "HMAC-MD5.SIG-ALG.REG.INT"
00239 
00240 #define NS_TSIG_ERROR_NO_TSIG -10
00241 #define NS_TSIG_ERROR_NO_SPACE -11
00242 #define NS_TSIG_ERROR_FORMERR -12
00243 
00244 /*
00245  * Currently defined type values for resources and queries.
00246  */
00247 typedef enum __ns_type {
00248         ns_t_invalid = 0,       /* Cookie. */
00249         ns_t_a = 1,             /* Host address. */
00250         ns_t_ns = 2,            /* Authoritative server. */
00251         ns_t_md = 3,            /* Mail destination. */
00252         ns_t_mf = 4,            /* Mail forwarder. */
00253         ns_t_cname = 5,         /* Canonical name. */
00254         ns_t_soa = 6,           /* Start of authority zone. */
00255         ns_t_mb = 7,            /* Mailbox domain name. */
00256         ns_t_mg = 8,            /* Mail group member. */
00257         ns_t_mr = 9,            /* Mail rename name. */
00258         ns_t_null = 10,         /* Null resource record. */
00259         ns_t_wks = 11,          /* Well known service. */
00260         ns_t_ptr = 12,          /* Domain name pointer. */
00261         ns_t_hinfo = 13,        /* Host information. */
00262         ns_t_minfo = 14,        /* Mailbox information. */
00263         ns_t_mx = 15,           /* Mail routing information. */
00264         ns_t_txt = 16,          /* Text strings. */
00265         ns_t_rp = 17,           /* Responsible person. */
00266         ns_t_afsdb = 18,        /* AFS cell database. */
00267         ns_t_x25 = 19,          /* X_25 calling address. */
00268         ns_t_isdn = 20,         /* ISDN calling address. */
00269         ns_t_rt = 21,           /* Router. */
00270         ns_t_nsap = 22,         /* NSAP address. */
00271         ns_t_nsap_ptr = 23,     /* Reverse NSAP lookup (deprecated). */
00272         ns_t_sig = 24,          /* Security signature. */
00273         ns_t_key = 25,          /* Security key. */
00274         ns_t_px = 26,           /* X.400 mail mapping. */
00275         ns_t_gpos = 27,         /* Geographical position (withdrawn). */
00276         ns_t_aaaa = 28,         /* Ip6 Address. */
00277         ns_t_loc = 29,          /* Location Information. */
00278         ns_t_nxt = 30,          /* Next domain (security). */
00279         ns_t_eid = 31,          /* Endpoint identifier. */
00280         ns_t_nimloc = 32,       /* Nimrod Locator. */
00281         ns_t_srv = 33,          /* Server Selection. */
00282         ns_t_atma = 34,         /* ATM Address */
00283         ns_t_naptr = 35,        /* Naming Authority PoinTeR */
00284         ns_t_kx = 36,           /* Key Exchange */
00285         ns_t_cert = 37,         /* Certification record */
00286         ns_t_a6 = 38,           /* IPv6 address (deprecates AAAA) */
00287         ns_t_dname = 39,        /* Non-terminal DNAME (for IPv6) */
00288         ns_t_sink = 40,         /* Kitchen sink (experimentatl) */
00289         ns_t_opt = 41,          /* EDNS0 option (meta-RR) */
00290         ns_t_tsig = 250,        /* Transaction signature. */
00291         ns_t_ixfr = 251,        /* Incremental zone transfer. */
00292         ns_t_axfr = 252,        /* Transfer zone of authority. */
00293         ns_t_mailb = 253,       /* Transfer mailbox records. */
00294         ns_t_maila = 254,       /* Transfer mail agent records. */
00295         ns_t_any = 255,         /* Wildcard match. */
00296         ns_t_zxfr = 256,        /* BIND-specific, nonstandard. */
00297         ns_t_max = 65536
00298 } ns_type;
00299 
00300 /* Exclusively a QTYPE? (not also an RTYPE) */
00301 #define ns_t_qt_p(t) (ns_t_xfr_p(t) || (t) == ns_t_any || \
00302                       (t) == ns_t_mailb || (t) == ns_t_maila)
00303 /* Some kind of meta-RR? (not a QTYPE, but also not an RTYPE) */
00304 #define ns_t_mrr_p(t) ((t) == ns_t_tsig || (t) == ns_t_opt)
00305 /* Exclusively an RTYPE? (not also a QTYPE or a meta-RR) */
00306 #define ns_t_rr_p(t) (!ns_t_qt_p(t) && !ns_t_mrr_p(t))
00307 #define ns_t_udp_p(t) ((t) != ns_t_axfr && (t) != ns_t_zxfr)
00308 #define ns_t_xfr_p(t) ((t) == ns_t_axfr || (t) == ns_t_ixfr || \
00309                        (t) == ns_t_zxfr)
00310 
00311 /*
00312  * Values for class field
00313  */
00314 typedef enum __ns_class {
00315         ns_c_invalid = 0,       /* Cookie. */
00316         ns_c_in = 1,            /* Internet. */
00317         ns_c_2 = 2,             /* unallocated/unsupported. */
00318         ns_c_chaos = 3,         /* MIT Chaos-net. */
00319         ns_c_hs = 4,            /* MIT Hesiod. */
00320         /* Query class values which do not appear in resource records */
00321         ns_c_none = 254,        /* for prereq. sections in update requests */
00322         ns_c_any = 255,         /* Wildcard match. */
00323         ns_c_max = 65536
00324 } ns_class;
00325 
00326 /* DNSSEC constants. */
00327 
00328 typedef enum __ns_key_types {
00329         ns_kt_rsa = 1,          /* key type RSA/MD5 */
00330         ns_kt_dh  = 2,          /* Diffie Hellman */
00331         ns_kt_dsa = 3,          /* Digital Signature Standard (MANDATORY) */
00332         ns_kt_private = 254     /* Private key type starts with OID */
00333 } ns_key_types;
00334 
00335 typedef enum __ns_cert_types {
00336         cert_t_pkix = 1,        /* PKIX (X.509v3) */
00337         cert_t_spki = 2,        /* SPKI */
00338         cert_t_pgp  = 3,        /* PGP */
00339         cert_t_url  = 253,      /* URL private type */
00340         cert_t_oid  = 254       /* OID private type */
00341 } ns_cert_types;
00342 
00343 /* Flags field of the KEY RR rdata. */
00344 #define NS_KEY_TYPEMASK         0xC000  /* Mask for "type" bits */
00345 #define NS_KEY_TYPE_AUTH_CONF   0x0000  /* Key usable for both */
00346 #define NS_KEY_TYPE_CONF_ONLY   0x8000  /* Key usable for confidentiality */
00347 #define NS_KEY_TYPE_AUTH_ONLY   0x4000  /* Key usable for authentication */
00348 #define NS_KEY_TYPE_NO_KEY      0xC000  /* No key usable for either; no key */
00349 /* The type bits can also be interpreted independently, as single bits: */
00350 #define NS_KEY_NO_AUTH          0x8000  /* Key unusable for authentication */
00351 #define NS_KEY_NO_CONF          0x4000  /* Key unusable for confidentiality */
00352 #define NS_KEY_RESERVED2        0x2000  /* Security is *mandatory* if bit=0 */
00353 #define NS_KEY_EXTENDED_FLAGS   0x1000  /* reserved - must be zero */
00354 #define NS_KEY_RESERVED4        0x0800  /* reserved - must be zero */
00355 #define NS_KEY_RESERVED5        0x0400  /* reserved - must be zero */
00356 #define NS_KEY_NAME_TYPE        0x0300  /* these bits determine the type */
00357 #define NS_KEY_NAME_USER        0x0000  /* key is assoc. with user */
00358 #define NS_KEY_NAME_ENTITY      0x0200  /* key is assoc. with entity eg host */
00359 #define NS_KEY_NAME_ZONE        0x0100  /* key is zone key */
00360 #define NS_KEY_NAME_RESERVED    0x0300  /* reserved meaning */
00361 #define NS_KEY_RESERVED8        0x0080  /* reserved - must be zero */
00362 #define NS_KEY_RESERVED9        0x0040  /* reserved - must be zero */
00363 #define NS_KEY_RESERVED10       0x0020  /* reserved - must be zero */
00364 #define NS_KEY_RESERVED11       0x0010  /* reserved - must be zero */
00365 #define NS_KEY_SIGNATORYMASK    0x000F  /* key can sign RR's of same name */
00366 #define NS_KEY_RESERVED_BITMASK ( NS_KEY_RESERVED2 | \
00367                                   NS_KEY_RESERVED4 | \
00368                                   NS_KEY_RESERVED5 | \
00369                                   NS_KEY_RESERVED8 | \
00370                                   NS_KEY_RESERVED9 | \
00371                                   NS_KEY_RESERVED10 | \
00372                                   NS_KEY_RESERVED11 )
00373 #define NS_KEY_RESERVED_BITMASK2 0xFFFF /* no bits defined here */
00374 
00375 /* The Algorithm field of the KEY and SIG RR's is an integer, {1..254} */
00376 #define NS_ALG_MD5RSA           1       /* MD5 with RSA */
00377 #define NS_ALG_DH               2       /* Diffie Hellman KEY */
00378 #define NS_ALG_DSA              3       /* DSA KEY */
00379 #define NS_ALG_DSS              NS_ALG_DSA
00380 #define NS_ALG_EXPIRE_ONLY      253     /* No alg, no security */
00381 #define NS_ALG_PRIVATE_OID      254     /* Key begins with OID giving alg */
00382 
00383 /* Protocol values  */
00384 /* value 0 is reserved */
00385 #define NS_KEY_PROT_TLS         1
00386 #define NS_KEY_PROT_EMAIL       2
00387 #define NS_KEY_PROT_DNSSEC      3
00388 #define NS_KEY_PROT_IPSEC       4
00389 #define NS_KEY_PROT_ANY         255
00390 
00391 /* Signatures */
00392 #define NS_MD5RSA_MIN_BITS       512    /* Size of a mod or exp in bits */
00393 #define NS_MD5RSA_MAX_BITS      2552
00394         /* Total of binary mod and exp */
00395 #define NS_MD5RSA_MAX_BYTES     ((NS_MD5RSA_MAX_BITS+7/8)*2+3)
00396         /* Max length of text sig block */
00397 #define NS_MD5RSA_MAX_BASE64    (((NS_MD5RSA_MAX_BYTES+2)/3)*4)
00398 #define NS_MD5RSA_MIN_SIZE      ((NS_MD5RSA_MIN_BITS+7)/8)
00399 #define NS_MD5RSA_MAX_SIZE      ((NS_MD5RSA_MAX_BITS+7)/8)
00400 
00401 #define NS_DSA_SIG_SIZE         41
00402 #define NS_DSA_MIN_SIZE         213
00403 #define NS_DSA_MAX_BYTES        405
00404 
00405 /* Offsets into SIG record rdata to find various values */
00406 #define NS_SIG_TYPE     0       /* Type flags */
00407 #define NS_SIG_ALG      2       /* Algorithm */
00408 #define NS_SIG_LABELS   3       /* How many labels in name */
00409 #define NS_SIG_OTTL     4       /* Original TTL */
00410 #define NS_SIG_EXPIR    8       /* Expiration time */
00411 #define NS_SIG_SIGNED   12      /* Signature time */
00412 #define NS_SIG_FOOT     16      /* Key footprint */
00413 #define NS_SIG_SIGNER   18      /* Domain name of who signed it */
00414 
00415 /* How RR types are represented as bit-flags in NXT records */
00416 #define NS_NXT_BITS 8
00417 #define NS_NXT_BIT_SET(  n,p) (p[(n)/NS_NXT_BITS] |=  (0x80>>((n)%NS_NXT_BITS)))
00418 #define NS_NXT_BIT_CLEAR(n,p) (p[(n)/NS_NXT_BITS] &= ~(0x80>>((n)%NS_NXT_BITS)))
00419 #define NS_NXT_BIT_ISSET(n,p) (p[(n)/NS_NXT_BITS] &   (0x80>>((n)%NS_NXT_BITS)))
00420 #define NS_NXT_MAX 127
00421 
00422 /*
00423  * Inline versions of get/put short/long.  Pointer is advanced.
00424  */
00425 #define NS_GET16(s, cp) do { \
00426         register u_int8_t *t_cp = (u_int8_t *)(cp); \
00427         (s) = ((u_int16_t)t_cp[0] << 8) \
00428             | ((u_int16_t)t_cp[1]) \
00429             ; \
00430         (cp) += NS_INT16SZ; \
00431 } while (0)
00432 
00433 #define NS_GET32(l, cp) do { \
00434         register u_int8_t *t_cp = (u_int8_t *)(cp); \
00435         (l) = ((u_int32_t)t_cp[0] << 24) \
00436             | ((u_int32_t)t_cp[1] << 16) \
00437             | ((u_int32_t)t_cp[2] << 8) \
00438             | ((u_int32_t)t_cp[3]) \
00439             ; \
00440         (cp) += NS_INT32SZ; \
00441 } while (0)
00442 
00443 #define NS_PUT16(s, cp) do { \
00444         register u_int16_t t_s = (u_int16_t)(s); \
00445         register u_int8_t *t_cp = (u_int8_t *)(cp); \
00446         *t_cp++ = t_s >> 8; \
00447         *t_cp   = t_s; \
00448         (cp) += NS_INT16SZ; \
00449 } while (0)
00450 
00451 #define NS_PUT32(l, cp) do { \
00452         register u_int32_t t_l = (u_int32_t)(l); \
00453         register u_int8_t *t_cp = (u_int8_t *)(cp); \
00454         *t_cp++ = t_l >> 24; \
00455         *t_cp++ = t_l >> 16; \
00456         *t_cp++ = t_l >> 8; \
00457         *t_cp   = t_l; \
00458         (cp) += NS_INT32SZ; \
00459 } while (0)
00460 
00461 #include <arpa/nameser_compat.h>
00462 
00463 #endif /* !_ARPA_NAMESER_H_ */

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