headers/posix/arpa/nameser.h

   1 /*
   2  * Copyright 2006-2012 Haiku, Inc. All Rights Reserved.
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6 /*
   7  * Portions Copyright (C) 2004, 2005, 2008, 2009  Internet Systems Consortium, Inc. ("ISC")
   8  * Portions Copyright (C) 1996-2003  Internet Software Consortium.
   9  *
  10  * Permission to use, copy, modify, and/or distribute this software for any
  11  * purpose with or without fee is hereby granted, provided that the above
  12  * copyright notice and this permission notice appear in all copies.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  15  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  16  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  17  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  18  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  19  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  20  * PERFORMANCE OF THIS SOFTWARE.
  21  */
  22
  23 /*
  24  * Copyright (c) 1983, 1989, 1993
  25  *    The Regents of the University of California.  All rights reserved.
  26  *
  27  * Redistribution and use in source and binary forms, with or without
  28  * modification, are permitted provided that the following conditions
  29  * are met:
  30  * 1. Redistributions of source code must retain the above copyright
  31  *    notice, this list of conditions and the following disclaimer.
  32  * 2. Redistributions in binary form must reproduce the above copyright
  33  *    notice, this list of conditions and the following disclaimer in the
  34  *    documentation and/or other materials provided with the distribution.
  35  * 3. All advertising materials mentioning features or use of this software
  36  *    must display the following acknowledgement:
  37  *      This product includes software developed by the University of
  38  *      California, Berkeley and its contributors.
  39  * 4. Neither the name of the University nor the names of its contributors
  40  *    may be used to endorse or promote products derived from this software
  41  *    without specific prior written permission.
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  */
  55 #ifndef _ARPA_NAMESER_H_
  56 #define _ARPA_NAMESER_H_
  57
  58
  59 #include <stdint.h>
  60 #include <sys/param.h>
  61 #include <sys/cdefs.h>
  62 #include <sys/types.h>
  63
  64
  65 /*
  66  * Revision information.  This is the release date in YYYYMMDD format.
  67  * It can change every day so the right thing to do with it is use it
  68  * in preprocessor commands such as "#if (__NAMESER > 19931104)".  Do not
  69  * compare for equality; rather, use it to determine whether your libbind.a
  70  * contains a new enough lib/nameser/ to support the feature you need.
  71  */
  72 #define __NAMESER       20090302        /* New interface version stamp. */
  73
  74 /*
  75  * Define constants based on RFC 883, RFC 1034, RFC 1035
  76  */
  77 #define NS_PACKETSZ             512             /* default UDP packet size */
  78 #define NS_MAXDNAME             1025    /* maximum domain name */
  79 #define NS_MAXMSG               65535   /* maximum message size */
  80 #define NS_MAXCDNAME    255             /* maximum compressed domain name */
  81 #define NS_MAXLABEL             63              /* maximum length of domain label */
  82 #define NS_MAXLABELS    128             /* theoretical max #/labels per domain name */
  83 #define NS_MAXNNAME             256             /* maximum uncompressed (binary) domain name */
  84 #define NS_MAXPADDR             40
  85 #define NS_HFIXEDSZ             12              /* #/bytes of fixed data in header */
  86 #define NS_QFIXEDSZ             4               /* #/bytes of fixed data in query */
  87 #define NS_RRFIXEDSZ    10              /* #/bytes of fixed data in r record */
  88 #define NS_INT32SZ              4               /* #/bytes of data in a u_int32_t */
  89 #define NS_INT16SZ              2               /* #/bytes of data in a u_int16_t */
  90 #define NS_INT8SZ               1               /* #/bytes of data in a u_int8_t */
  91 #define NS_INADDRSZ             4               /* IPv4 T_A */
  92 #define NS_IN6ADDRSZ    16              /* IPv6 T_AAAA */
  93 #define NS_CMPRSFLGS    0xc0    /* Flag bits indicating name compression. */
  94 #define NS_DEFAULTPORT  53              /* For both TCP and UDP. */
  95
  96 /*
  97  * These can be expanded with synonyms, just keep ns_parse.c:ns_parserecord()
  98  * in synch with it.
  99  */
 100 typedef enum __ns_sect {
 101         ns_s_qd = 0,            /* Query: Question. */
 102         ns_s_zn = 0,            /* Update: Zone. */
 103         ns_s_an = 1,            /* Query: Answer. */
 104         ns_s_pr = 1,            /* Update: Prerequisites. */
 105         ns_s_ns = 2,            /* Query: Name servers. */
 106         ns_s_ud = 2,            /* Update: Update. */
 107         ns_s_ar = 3,            /* Query|Update: Additional records. */
 108         ns_s_max = 4
 109 } ns_sect;
 110
 111 /*
 112  * Network name (compressed or not) type. Equivalent to a pointer when used
 113  * in a function prototype. Can be const'd.
 114  */
 115 typedef u_char ns_nname[NS_MAXNNAME];
 116 typedef const u_char *ns_nname_ct;
 117 typedef u_char *ns_nname_t;
 118
 119 struct ns_namemap { ns_nname_ct base; int len; };
 120 typedef struct ns_namemap *ns_namemap_t;
 121 typedef const struct ns_namemap *ns_namemap_ct;
 122
 123 /*
 124  * This is a message handle.  It is caller allocated and has no dynamic data.
 125  * This structure is intended to be opaque to all but ns_parse.c, thus the
 126  * leading _'s on the member names.  Use the accessor functions, not the _'s.
 127  */
 128 typedef struct __ns_msg {
 129         const u_char    *_msg;
 130         const u_char    *_eom;
 131         u_int16_t               _id;
 132         u_int16_t               _flags;
 133         u_int16_t               _counts[ns_s_max];
 134         const u_char    *_sections[ns_s_max];
 135         ns_sect                 _sect;
 136         int                             _rrnum;
 137         const u_char    *_msg_ptr;
 138 } ns_msg;
 139
 140 /*
 141  * This is a newmsg handle, used when constructing new messages with
 142  * ns_newmsg_init(), et al.
 143  */
 144 struct ns_newmsg {
 145         ns_msg                  msg;
 146         const u_char    *dnptrs[25];
 147         const u_char    **lastdnptr;
 148 };
 149 typedef struct ns_newmsg ns_newmsg;
 150
 151 /* Private data structure - do not use from outside library. */
 152 struct _ns_flagdata {  int mask, shift;  };
 153 extern struct _ns_flagdata _ns_flagdata[];
 154
 155 /* Accessor macros - this is part of the public interface. */
 156
 157 #define ns_msg_id(handle) ((handle)._id + 0)
 158 #define ns_msg_base(handle) ((handle)._msg + 0)
 159 #define ns_msg_end(handle) ((handle)._eom + 0)
 160 #define ns_msg_size(handle) ((handle)._eom - (handle)._msg)
 161 #define ns_msg_count(handle, section) ((handle)._counts[section] + 0)
 162
 163 /*
 164  * This is a parsed record.  It is caller allocated and has no dynamic data.
 165  */
 166 typedef struct __ns_rr {
 167         char                    name[NS_MAXDNAME];
 168         u_int16_t               type;
 169         u_int16_t               rr_class;
 170         u_int32_t               ttl;
 171         u_int16_t               rdlength;
 172         const u_char    *rdata;
 173 } ns_rr;
 174
 175 /*
 176  * Same thing, but using uncompressed network binary names, and real C types.
 177  */
 178 typedef struct __ns_rr2 {
 179         ns_nname                nname;
 180         size_t                  nnamel;
 181         int                             type;
 182         int                             rr_class;
 183         u_int                   ttl;
 184         int                             rdlength;
 185         const u_char    *rdata;
 186 } ns_rr2;
 187
 188 /* Accessor macros - this is part of the public interface. */
 189 #define ns_rr_name(rr)  (((rr).name[0] != '\0') ? (rr).name : ".")
 190 #define ns_rr_nname(rr) ((const ns_nname_t)(rr).nname)
 191 #define ns_rr_nnamel(rr) ((rr).nnamel + 0)
 192 #define ns_rr_type(rr)  ((ns_type)((rr).type + 0))
 193 #define ns_rr_class(rr) ((ns_class)((rr).rr_class + 0))
 194 #define ns_rr_ttl(rr)   ((rr).ttl + 0)
 195 #define ns_rr_rdlen(rr) ((rr).rdlength + 0)
 196 #define ns_rr_rdata(rr) ((rr).rdata + 0)
 197
 198 /*
 199  * These don't have to be in the same order as in the packet flags word,
 200  * and they can even overlap in some cases, but they will need to be kept
 201  * in synch with ns_parse.c:ns_flagdata[].
 202  */
 203 typedef enum __ns_flag {
 204         ns_f_qr,                /* Question/Response. */
 205         ns_f_opcode,    /* Operation code. */
 206         ns_f_aa,                /* Authoritative Answer. */
 207         ns_f_tc,                /* Truncation occurred. */
 208         ns_f_rd,                /* Recursion Desired. */
 209         ns_f_ra,                /* Recursion Available. */
 210         ns_f_z,                 /* MBZ. */
 211         ns_f_ad,                /* Authentic Data (DNSSEC). */
 212         ns_f_cd,                /* Checking Disabled (DNSSEC). */
 213         ns_f_rcode,             /* Response code. */
 214         ns_f_max
 215 } ns_flag;
 216
 217 /*
 218  * Currently defined opcodes.
 219  */
 220 typedef enum __ns_opcode {
 221         ns_o_query = 0,         /* Standard query. */
 222         ns_o_iquery = 1,        /* Inverse query (deprecated/unsupported). */
 223         ns_o_status = 2,        /* Name server status query (unsupported). */
 224         /* Opcode 3 is undefined/reserved. */
 225         ns_o_notify = 4,        /* Zone change notification. */
 226         ns_o_update = 5,        /* Zone update message. */
 227         ns_o_max = 6
 228 } ns_opcode;
 229
 230 /*
 231  * Currently defined response codes.
 232  */
 233 typedef enum __ns_rcode {
 234         ns_r_noerror = 0,       /* No error occurred. */
 235         ns_r_formerr = 1,       /* Format error. */
 236         ns_r_servfail = 2,      /* Server failure. */
 237         ns_r_nxdomain = 3,      /* Name error. */
 238         ns_r_notimpl = 4,       /* Unimplemented. */
 239         ns_r_refused = 5,       /* Operation refused. */
 240         /* these are for BIND_UPDATE */
 241         ns_r_yxdomain = 6,      /* Name exists */
 242         ns_r_yxrrset = 7,       /* RRset exists */
 243         ns_r_nxrrset = 8,       /* RRset does not exist */
 244         ns_r_notauth = 9,       /* Not authoritative for zone */
 245         ns_r_notzone = 10,      /* Zone of record different from zone section */
 246         ns_r_max = 11,
 247         /* The following are EDNS extended rcodes */
 248         ns_r_badvers = 16,
 249         /* The following are TSIG errors */
 250         ns_r_badsig = 16,
 251         ns_r_badkey = 17,
 252         ns_r_badtime = 18
 253 } ns_rcode;
 254
 255 /* BIND_UPDATE */
 256 typedef enum __ns_update_operation {
 257         ns_uop_delete = 0,
 258         ns_uop_add = 1,
 259         ns_uop_max = 2
 260 } ns_update_operation;
 261
 262 /*
 263  * This structure is used for TSIG authenticated messages
 264  */
 265 struct ns_tsig_key {
 266         char                    name[NS_MAXDNAME];
 267         char                    alg[NS_MAXDNAME];
 268         unsigned char   *data;
 269         int                             len;
 270 };
 271 typedef struct ns_tsig_key ns_tsig_key;
 272
 273 /*
 274  * This structure is used for TSIG authenticated TCP messages
 275  */
 276 struct ns_tcp_tsig_state {
 277         int                             counter;
 278         struct dst_key  *key;
 279         void                    *ctx;
 280         unsigned char   sig[NS_PACKETSZ];
 281         int                             siglen;
 282 };
 283 typedef struct ns_tcp_tsig_state ns_tcp_tsig_state;
 284
 285 #define NS_TSIG_FUDGE 300
 286 #define NS_TSIG_TCP_COUNT 100
 287 #define NS_TSIG_ALG_HMAC_MD5 "HMAC-MD5.SIG-ALG.REG.INT"
 288
 289 #define NS_TSIG_ERROR_NO_TSIG -10
 290 #define NS_TSIG_ERROR_NO_SPACE -11
 291 #define NS_TSIG_ERROR_FORMERR -12
 292
 293 /*
 294  * Currently defined type values for resources and queries.
 295  */
 296 typedef enum __ns_type {
 297         ns_t_invalid = 0,       /* Cookie. */
 298         ns_t_a = 1,                     /* Host address. */
 299         ns_t_ns = 2,            /* Authoritative server. */
 300         ns_t_md = 3,            /* Mail destination. */
 301         ns_t_mf = 4,            /* Mail forwarder. */
 302         ns_t_cname = 5,         /* Canonical name. */
 303         ns_t_soa = 6,           /* Start of authority zone. */
 304         ns_t_mb = 7,            /* Mailbox domain name. */
 305         ns_t_mg = 8,            /* Mail group member. */
 306         ns_t_mr = 9,            /* Mail rename name. */
 307         ns_t_null = 10,         /* Null resource record. */
 308         ns_t_wks = 11,          /* Well known service. */
 309         ns_t_ptr = 12,          /* Domain name pointer. */
 310         ns_t_hinfo = 13,        /* Host information. */
 311         ns_t_minfo = 14,        /* Mailbox information. */
 312         ns_t_mx = 15,           /* Mail routing information. */
 313         ns_t_txt = 16,          /* Text strings. */
 314         ns_t_rp = 17,           /* Responsible person. */
 315         ns_t_afsdb = 18,        /* AFS cell database. */
 316         ns_t_x25 = 19,          /* X_25 calling address. */
 317         ns_t_isdn = 20,         /* ISDN calling address. */
 318         ns_t_rt = 21,           /* Router. */
 319         ns_t_nsap = 22,         /* NSAP address. */
 320         ns_t_nsap_ptr = 23,     /* Reverse NSAP lookup (deprecated). */
 321         ns_t_sig = 24,          /* Security signature. */
 322         ns_t_key = 25,          /* Security key. */
 323         ns_t_px = 26,           /* X.400 mail mapping. */
 324         ns_t_gpos = 27,         /* Geographical position (withdrawn). */
 325         ns_t_aaaa = 28,         /* Ip6 Address. */
 326         ns_t_loc = 29,          /* Location Information. */
 327         ns_t_nxt = 30,          /* Next domain (security). */
 328         ns_t_eid = 31,          /* Endpoint identifier. */
 329         ns_t_nimloc = 32,       /* Nimrod Locator. */
 330         ns_t_srv = 33,          /* Server Selection. */
 331         ns_t_atma = 34,         /* ATM Address */
 332         ns_t_naptr = 35,        /* Naming Authority PoinTeR */
 333         ns_t_kx = 36,           /* Key Exchange */
 334         ns_t_cert = 37,         /* Certification record */
 335         ns_t_a6 = 38,           /* IPv6 address (deprecates AAAA) */
 336         ns_t_dname = 39,        /* Non-terminal DNAME (for IPv6) */
 337         ns_t_sink = 40,         /* Kitchen sink (experimentatl) */
 338         ns_t_opt = 41,          /* EDNS0 option (meta-RR) */
 339         ns_t_apl = 42,          /* Address prefix list (RFC 3123) */
 340         ns_t_ds = 43,           /* Delegation Signer */
 341         ns_t_sshfp = 44,        /* SSH Fingerprint */
 342         ns_t_ipseckey = 45,     /* IPSEC Key */
 343         ns_t_rrsig = 46,        /* RRset Signature */
 344         ns_t_nsec = 47,         /* Negative security */
 345         ns_t_dnskey = 48,       /* DNS Key */
 346         ns_t_dhcid = 49,        /* Dynamic host configuratin identifier */
 347         ns_t_nsec3 = 50,        /* Negative security type 3 */
 348         ns_t_nsec3param = 51, /* Negative security type 3 parameters */
 349         ns_t_hip = 55,          /* Host Identity Protocol */
 350         ns_t_spf = 99,          /* Sender Policy Framework */
 351         ns_t_tkey = 249,        /* Transaction key */
 352         ns_t_tsig = 250,        /* Transaction signature. */
 353         ns_t_ixfr = 251,        /* Incremental zone transfer. */
 354         ns_t_axfr = 252,        /* Transfer zone of authority. */
 355         ns_t_mailb = 253,       /* Transfer mailbox records. */
 356         ns_t_maila = 254,       /* Transfer mail agent records. */
 357         ns_t_any = 255,         /* Wildcard match. */
 358         ns_t_zxfr = 256,        /* BIND-specific, nonstandard. */
 359         ns_t_dlv = 32769,       /* DNSSEC look-aside validatation. */
 360         ns_t_max = 65536
 361 } ns_type;
 362
 363 /* Exclusively a QTYPE? (not also an RTYPE) */
 364 #define ns_t_qt_p(t) (ns_t_xfr_p(t) || (t) == ns_t_any || \
 365                       (t) == ns_t_mailb || (t) == ns_t_maila)
 366 /* Some kind of meta-RR? (not a QTYPE, but also not an RTYPE) */
 367 #define ns_t_mrr_p(t) ((t) == ns_t_tsig || (t) == ns_t_opt)
 368 /* Exclusively an RTYPE? (not also a QTYPE or a meta-RR) */
 369 #define ns_t_rr_p(t) (!ns_t_qt_p(t) && !ns_t_mrr_p(t))
 370 #define ns_t_udp_p(t) ((t) != ns_t_axfr && (t) != ns_t_zxfr)
 371 #define ns_t_xfr_p(t) ((t) == ns_t_axfr || (t) == ns_t_ixfr || \
 372                        (t) == ns_t_zxfr)
 373
 374 /*
 375  * Values for class field
 376  */
 377 typedef enum __ns_class {
 378         ns_c_invalid = 0,       /* Cookie. */
 379         ns_c_in = 1,            /* Internet. */
 380         ns_c_2 = 2,             /* unallocated/unsupported. */
 381         ns_c_chaos = 3,         /* MIT Chaos-net. */
 382         ns_c_hs = 4,            /* MIT Hesiod. */
 383         /* Query class values which do not appear in resource records */
 384         ns_c_none = 254,        /* for prereq. sections in update requests */
 385         ns_c_any = 255,         /* Wildcard match. */
 386         ns_c_max = 65536
 387 } ns_class;
 388
 389 /* DNSSEC constants. */
 390
 391 typedef enum __ns_key_types {
 392         ns_kt_rsa = 1,          /* key type RSA/MD5 */
 393         ns_kt_dh  = 2,          /* Diffie Hellman */
 394         ns_kt_dsa = 3,          /* Digital Signature Standard (MANDATORY) */
 395         ns_kt_private = 254     /* Private key type starts with OID */
 396 } ns_key_types;
 397
 398 typedef enum __ns_cert_types {
 399         cert_t_pkix = 1,        /* PKIX (X.509v3) */
 400         cert_t_spki = 2,        /* SPKI */
 401         cert_t_pgp  = 3,        /* PGP */
 402         cert_t_url  = 253,      /* URL private type */
 403         cert_t_oid  = 254       /* OID private type */
 404 } ns_cert_types;
 405
 406 /* Flags field of the KEY RR rdata. */
 407 #define NS_KEY_TYPEMASK         0xC000  /* Mask for "type" bits */
 408 #define NS_KEY_TYPE_AUTH_CONF   0x0000  /* Key usable for both */
 409 #define NS_KEY_TYPE_CONF_ONLY   0x8000  /* Key usable for confidentiality */
 410 #define NS_KEY_TYPE_AUTH_ONLY   0x4000  /* Key usable for authentication */
 411 #define NS_KEY_TYPE_NO_KEY      0xC000  /* No key usable for either; no key */
 412 /* The type bits can also be interpreted independently, as single bits: */
 413 #define NS_KEY_NO_AUTH          0x8000  /* Key unusable for authentication */
 414 #define NS_KEY_NO_CONF          0x4000  /* Key unusable for confidentiality */
 415 #define NS_KEY_RESERVED2        0x2000  /* Security is *mandatory* if bit=0 */
 416 #define NS_KEY_EXTENDED_FLAGS   0x1000  /* reserved - must be zero */
 417 #define NS_KEY_RESERVED4        0x0800  /* reserved - must be zero */
 418 #define NS_KEY_RESERVED5        0x0400  /* reserved - must be zero */
 419 #define NS_KEY_NAME_TYPE        0x0300  /* these bits determine the type */
 420 #define NS_KEY_NAME_USER        0x0000  /* key is assoc. with user */
 421 #define NS_KEY_NAME_ENTITY      0x0200  /* key is assoc. with entity eg host */
 422 #define NS_KEY_NAME_ZONE        0x0100  /* key is zone key */
 423 #define NS_KEY_NAME_RESERVED    0x0300  /* reserved meaning */
 424 #define NS_KEY_RESERVED8        0x0080  /* reserved - must be zero */
 425 #define NS_KEY_RESERVED9        0x0040  /* reserved - must be zero */
 426 #define NS_KEY_RESERVED10       0x0020  /* reserved - must be zero */
 427 #define NS_KEY_RESERVED11       0x0010  /* reserved - must be zero */
 428 #define NS_KEY_SIGNATORYMASK    0x000F  /* key can sign RR's of same name */
 429 #define NS_KEY_RESERVED_BITMASK (NS_KEY_RESERVED2 | NS_KEY_RESERVED4 \
 430         | NS_KEY_RESERVED5 | NS_KEY_RESERVED8 | NS_KEY_RESERVED9 \
 431         | NS_KEY_RESERVED10 | NS_KEY_RESERVED11)
 432 #define NS_KEY_RESERVED_BITMASK2 0xFFFF /* no bits defined here */
 433
 434 /* The Algorithm field of the KEY and SIG RR's is an integer, {1..254} */
 435 #define NS_ALG_MD5RSA           1       /* MD5 with RSA */
 436 #define NS_ALG_DH               2       /* Diffie Hellman KEY */
 437 #define NS_ALG_DSA              3       /* DSA KEY */
 438 #define NS_ALG_DSS              NS_ALG_DSA
 439 #define NS_ALG_EXPIRE_ONLY      253     /* No alg, no security */
 440 #define NS_ALG_PRIVATE_OID      254     /* Key begins with OID giving alg */
 441
 442 /* Protocol values  */
 443 /* value 0 is reserved */
 444 #define NS_KEY_PROT_TLS         1
 445 #define NS_KEY_PROT_EMAIL       2
 446 #define NS_KEY_PROT_DNSSEC      3
 447 #define NS_KEY_PROT_IPSEC       4
 448 #define NS_KEY_PROT_ANY         255
 449
 450 /* Signatures */
 451 #define NS_MD5RSA_MIN_BITS       512    /* Size of a mod or exp in bits */
 452 #define NS_MD5RSA_MAX_BITS      4096
 453         /* Total of binary mod and exp */
 454 #define NS_MD5RSA_MAX_BYTES     ((NS_MD5RSA_MAX_BITS+7/8)*2+3)
 455         /* Max length of text sig block */
 456 #define NS_MD5RSA_MAX_BASE64    (((NS_MD5RSA_MAX_BYTES+2)/3)*4)
 457 #define NS_MD5RSA_MIN_SIZE      ((NS_MD5RSA_MIN_BITS+7)/8)
 458 #define NS_MD5RSA_MAX_SIZE      ((NS_MD5RSA_MAX_BITS+7)/8)
 459
 460 #define NS_DSA_SIG_SIZE         41
 461 #define NS_DSA_MIN_SIZE         213
 462 #define NS_DSA_MAX_BYTES        405
 463
 464 /* Offsets into SIG record rdata to find various values */
 465 #define NS_SIG_TYPE     0       /* Type flags */
 466 #define NS_SIG_ALG      2       /* Algorithm */
 467 #define NS_SIG_LABELS   3       /* How many labels in name */
 468 #define NS_SIG_OTTL     4       /* Original TTL */
 469 #define NS_SIG_EXPIR    8       /* Expiration time */
 470 #define NS_SIG_SIGNED   12      /* Signature time */
 471 #define NS_SIG_FOOT     16      /* Key footprint */
 472 #define NS_SIG_SIGNER   18      /* Domain name of who signed it */
 473
 474 /* How RR types are represented as bit-flags in NXT records */
 475 #define NS_NXT_BITS 8
 476 #define NS_NXT_BIT_SET(  n,p) (p[(n)/NS_NXT_BITS] |=  (0x80>>((n)%NS_NXT_BITS)))
 477 #define NS_NXT_BIT_CLEAR(n,p) (p[(n)/NS_NXT_BITS] &= ~(0x80>>((n)%NS_NXT_BITS)))
 478 #define NS_NXT_BIT_ISSET(n,p) (p[(n)/NS_NXT_BITS] &   (0x80>>((n)%NS_NXT_BITS)))
 479 #define NS_NXT_MAX 127
 480
 481 /*
 482  * EDNS0 extended flags, host order.
 483  */
 484 #define NS_OPT_DNSSEC_OK        0x8000U
 485 #define NS_OPT_NSID                     3
 486
 487 /*
 488  * Inline versions of get/put short/long.  Pointer is advanced.
 489  */
 490 #define NS_GET16(s, cp) do { \
 491         register const u_char *t_cp = (const u_char *)(cp); \
 492         (s) = ((u_int16_t)t_cp[0] << 8) \
 493             | ((u_int16_t)t_cp[1]) \
 494             ; \
 495         (cp) += NS_INT16SZ; \
 496 } while (0)
 497
 498 #define NS_GET32(l, cp) do { \
 499         register const u_char *t_cp = (const u_char *)(cp); \
 500         (l) = ((u_int32_t)t_cp[0] << 24) \
 501             | ((u_int32_t)t_cp[1] << 16) \
 502             | ((u_int32_t)t_cp[2] << 8) \
 503             | ((u_int32_t)t_cp[3]) \
 504             ; \
 505         (cp) += NS_INT32SZ; \
 506 } while (0)
 507
 508 #define NS_PUT16(s, cp) do { \
 509         register u_int16_t t_s = (u_int16_t)(s); \
 510         register u_char *t_cp = (u_char *)(cp); \
 511         *t_cp++ = t_s >> 8; \
 512         *t_cp   = t_s; \
 513         (cp) += NS_INT16SZ; \
 514 } while (0)
 515
 516 #define NS_PUT32(l, cp) do { \
 517         register u_int32_t t_l = (u_int32_t)(l); \
 518         register u_char *t_cp = (u_char *)(cp); \
 519         *t_cp++ = t_l >> 24; \
 520         *t_cp++ = t_l >> 16; \
 521         *t_cp++ = t_l >> 8; \
 522         *t_cp   = t_l; \
 523         (cp) += NS_INT32SZ; \
 524 } while (0)
 525
 526 /*
 527  * ANSI C identifier hiding for bind's lib/nameser.
 528  */
 529 #define ns_msg_getflag          __ns_msg_getflag
 530 #define ns_get16                        __ns_get16
 531 #define ns_get32                        __ns_get32
 532 #define ns_put16                        __ns_put16
 533 #define ns_put32                        __ns_put32
 534 #define ns_initparse            __ns_initparse
 535 #define ns_skiprr                       __ns_skiprr
 536 #define ns_parserr                      __ns_parserr
 537 #define ns_parserr2                     __ns_parserr2
 538 #define ns_sprintrr                     __ns_sprintrr
 539 #define ns_sprintrrf            __ns_sprintrrf
 540 #define ns_format_ttl           __ns_format_ttl
 541 #define ns_parse_ttl            __ns_parse_ttl
 542 #define ns_datetosecs           __ns_datetosecs
 543 #define ns_name_ntol            __ns_name_ntol
 544 #define ns_name_ntop            __ns_name_ntop
 545 #define ns_name_pton            __ns_name_pton
 546 #define ns_name_pton2           __ns_name_pton2
 547 #define ns_name_unpack          __ns_name_unpack
 548 #define ns_name_unpack2         __ns_name_unpack2
 549 #define ns_name_pack            __ns_name_pack
 550 #define ns_name_compress        __ns_name_compress
 551 #define ns_name_uncompress      __ns_name_uncompress
 552 #define ns_name_skip            __ns_name_skip
 553 #define ns_name_rollback        __ns_name_rollback
 554 #define ns_name_length          __ns_name_length
 555 #define ns_name_eq                      __ns_name_eq
 556 #define ns_name_owned           __ns_name_owned
 557 #define ns_name_map                     __ns_name_map
 558 #define ns_name_labels          __ns_name_labels
 559 #define ns_sign                         __ns_sign
 560 #define ns_sign2                        __ns_sign2
 561 #define ns_sign_tcp                     __ns_sign_tcp
 562 #define ns_sign_tcp2            __ns_sign_tcp2
 563 #define ns_sign_tcp_init        __ns_sign_tcp_init
 564 #define ns_find_tsig            __ns_find_tsig
 565 #define ns_verify                       __ns_verify
 566 #define ns_verify_tcp           __ns_verify_tcp
 567 #define ns_verify_tcp_init      __ns_verify_tcp_init
 568 #define ns_samedomain           __ns_samedomain
 569 #define ns_subdomain            __ns_subdomain
 570 #define ns_makecanon            __ns_makecanon
 571 #define ns_samename                     __ns_samename
 572 #define ns_newmsg_init          __ns_newmsg_init
 573 #define ns_newmsg_copy          __ns_newmsg_copy
 574 #define ns_newmsg_id            __ns_newmsg_id
 575 #define ns_newmsg_flag          __ns_newmsg_flag
 576 #define ns_newmsg_q                     __ns_newmsg_q
 577 #define ns_newmsg_rr            __ns_newmsg_rr
 578 #define ns_newmsg_done          __ns_newmsg_done
 579 #define ns_rdata_unpack         __ns_rdata_unpack
 580 #define ns_rdata_equal          __ns_rdata_equal
 581 #define ns_rdata_refers         __ns_rdata_refers
 582
 583
 584 #ifdef __cplusplus
 585 extern "C" {
 586 #endif
 587
 588 int             ns_msg_getflag(ns_msg, int);
 589 uint16_t ns_get16(const u_char *);
 590 uint32_t ns_get32(const u_char *);
 591 void    ns_put16(uint16_t, u_char *);
 592 void    ns_put32(uint32_t, u_char *);
 593 int             ns_initparse(const u_char *, int, ns_msg *);
 594 int             ns_skiprr(const u_char *, const u_char *, ns_sect, int);
 595 int             ns_parserr(ns_msg *, ns_sect, int, ns_rr *);
 596 int             ns_parserr2(ns_msg *, ns_sect, int, ns_rr2 *);
 597 int             ns_sprintrr(const ns_msg *, const ns_rr *,
 598                         const char *, const char *, char *, size_t);
 599 int             ns_sprintrrf(const u_char *, size_t, const char *,
 600                         ns_class, ns_type, u_long, const u_char *,
 601                         size_t, const char *, const char *,
 602                         char *, size_t);
 603 int             ns_format_ttl(u_long, char *, size_t);
 604 int             ns_parse_ttl(const char *, u_long *);
 605 u_int32_t ns_datetosecs(const char *cp, int *errp);
 606 int             ns_name_ntol(const u_char *, u_char *, size_t);
 607 int             ns_name_ntop(const u_char *, char *, size_t);
 608 int             ns_name_pton(const char *, u_char *, size_t);
 609 int             ns_name_pton2(const char *, u_char *, size_t, size_t *);
 610 int             ns_name_unpack(const u_char *, const u_char *,
 611                         const u_char *, u_char *, size_t);
 612 int             ns_name_unpack2(const u_char *, const u_char *,
 613                         const u_char *, u_char *, size_t, size_t *);
 614 int             ns_name_pack(const u_char *, u_char *, int,
 615                         const u_char **, const u_char **);
 616 int             ns_name_uncompress(const u_char *, const u_char *,
 617                         const u_char *, char *, size_t);
 618 int             ns_name_compress(const char *, u_char *, size_t,
 619                          const u_char **, const u_char **);
 620 int             ns_name_skip(const u_char **, const u_char *);
 621 void    ns_name_rollback(const u_char *, const u_char **, const u_char **);
 622 ssize_t ns_name_length(ns_nname_ct nname, size_t nameSize);
 623 int             ns_name_eq(ns_nname_ct a, size_t aLength, ns_nname_ct b,
 624                         size_t bLength);
 625 int             ns_name_owned(ns_namemap_ct a, int aLength, ns_namemap_ct b,
 626                         int bLength);
 627 int             ns_name_map(ns_nname_ct nname, size_t nameLength, ns_namemap_t map,
 628                         int mapSize);
 629 int             ns_name_labels(ns_nname_ct, size_t);
 630 int             ns_sign(u_char *, int *, int, int, void *,
 631                         const u_char *, int, u_char *, int *, time_t);
 632 int             ns_sign2(u_char *, int *, int, int, void *,
 633                         const u_char *, int, u_char *, int *, time_t,
 634                         u_char **, u_char **);
 635 int             ns_sign_tcp(u_char *, int *, int, int,
 636                         ns_tcp_tsig_state *, int);
 637 int             ns_sign_tcp2(u_char *, int *, int, int,
 638                         ns_tcp_tsig_state *, int,
 639                         u_char **, u_char **);
 640 int             ns_sign_tcp_init(void *, const u_char *, int,
 641                         ns_tcp_tsig_state *);
 642 u_char  *ns_find_tsig(u_char *, u_char *);
 643 int             ns_verify(u_char *, int *, void *,
 644                         const u_char *, int, u_char *, int *,
 645                         time_t *, int);
 646 int             ns_verify_tcp(u_char *, int *, ns_tcp_tsig_state *, int);
 647 int             ns_verify_tcp_init(void *, const u_char *, int,
 648                         ns_tcp_tsig_state *);
 649 int             ns_samedomain(const char *, const char *);
 650 int             ns_subdomain(const char *, const char *);
 651 int             ns_makecanon(const char *, char *, size_t);
 652 int             ns_samename(const char *, const char *);
 653 int             ns_newmsg_init(u_char *buffer, size_t bufsiz, ns_newmsg *);
 654 int             ns_newmsg_copy(ns_newmsg *, ns_msg *);
 655 void    ns_newmsg_id(ns_newmsg *handle, u_int16_t id);
 656 void    ns_newmsg_flag(ns_newmsg *handle, ns_flag flag, u_int value);
 657 int             ns_newmsg_q(ns_newmsg *handle, ns_nname_ct qname, ns_type qtype,
 658                         ns_class qclass);
 659 int             ns_newmsg_rr(ns_newmsg *handle, ns_sect sect, ns_nname_ct name,
 660                         ns_type type, ns_class rr_class, u_int32_t ttl, u_int16_t rdlen,
 661                         const u_char *rdata);
 662 size_t  ns_newmsg_done(ns_newmsg *handle);
 663 ssize_t ns_rdata_unpack(const u_char *, const u_char *, ns_type, const u_char *,
 664                         size_t, u_char *, size_t);
 665 int             ns_rdata_equal(ns_type, const u_char *, size_t, const u_char *, size_t);
 666 int             ns_rdata_refers(ns_type, const u_char *, size_t, const u_char *);
 667
 668 #ifdef __cplusplus
 669 }
 670 #endif
 671
 672 #include <arpa/nameser_compat.h>
 673
 674 #endif  /* _ARPA_NAMESER_H_ */