include/arpa/nameser.h

   1 #ifndef _ARPA_NAMESER_H
   2 #define _ARPA_NAMESER_H
   3
   4 #ifdef __cplusplus
   5 extern "C" {
   6 #endif
   7
   8 #include <stddef.h>
   9 #include <stdint.h>
  10
  11 #define __NAMESER       19991006
  12 #define NS_PACKETSZ     512
  13 #define NS_MAXDNAME     1025
  14 #define NS_MAXMSG       65535
  15 #define NS_MAXCDNAME    255
  16 #define NS_MAXLABEL     63
  17 #define NS_HFIXEDSZ     12
  18 #define NS_QFIXEDSZ     4
  19 #define NS_RRFIXEDSZ    10
  20 #define NS_INT32SZ      4
  21 #define NS_INT16SZ      2
  22 #define NS_INT8SZ       1
  23 #define NS_INADDRSZ     4
  24 #define NS_IN6ADDRSZ    16
  25 #define NS_CMPRSFLGS    0xc0
  26 #define NS_DEFAULTPORT  53
  27
  28 typedef enum __ns_sect {
  29         ns_s_qd = 0,
  30         ns_s_zn = 0,
  31         ns_s_an = 1,
  32         ns_s_pr = 1,
  33         ns_s_ns = 2,
  34         ns_s_ud = 2,
  35         ns_s_ar = 3,
  36         ns_s_max = 4
  37 } ns_sect;
  38
  39 typedef struct __ns_msg {
  40         const unsigned char *_msg, *_eom;
  41         uint16_t _id, _flags, _counts[ns_s_max];
  42         const unsigned char *_sections[ns_s_max];
  43         ns_sect _sect;
  44         int _rrnum;
  45         const unsigned char *_msg_ptr;
  46 } ns_msg;
  47
  48 struct _ns_flagdata {  int mask, shift;  };
  49 extern const struct _ns_flagdata _ns_flagdata[];
  50
  51 #define ns_msg_id(handle) ((handle)._id + 0)
  52 #define ns_msg_base(handle) ((handle)._msg + 0)
  53 #define ns_msg_end(handle) ((handle)._eom + 0)
  54 #define ns_msg_size(handle) ((handle)._eom - (handle)._msg)
  55 #define ns_msg_count(handle, section) ((handle)._counts[section] + 0)
  56 #define ns_msg_getflag(handle, flag) \
  57         (((handle)._flags & _ns_flagdata[flag].mask) >> _ns_flagdata[flag].shift)
  58
  59 typedef struct __ns_rr {
  60         char            name[NS_MAXDNAME];
  61         uint16_t        type;
  62         uint16_t        rr_class;
  63         uint32_t        ttl;
  64         uint16_t        rdlength;
  65         const unsigned char *rdata;
  66 } ns_rr;
  67
  68 #define ns_rr_name(rr)  (((rr).name[0] != '\0') ? (rr).name : ".")
  69 #define ns_rr_type(rr)  ((ns_type)((rr).type + 0))
  70 #define ns_rr_class(rr) ((ns_class)((rr).rr_class + 0))
  71 #define ns_rr_ttl(rr)   ((rr).ttl + 0)
  72 #define ns_rr_rdlen(rr) ((rr).rdlength + 0)
  73 #define ns_rr_rdata(rr) ((rr).rdata + 0)
  74
  75 typedef enum __ns_flag {
  76         ns_f_qr,
  77         ns_f_opcode,
  78         ns_f_aa,
  79         ns_f_tc,
  80         ns_f_rd,
  81         ns_f_ra,
  82         ns_f_z,
  83         ns_f_ad,
  84         ns_f_cd,
  85         ns_f_rcode,
  86         ns_f_max
  87 } ns_flag;
  88
  89 typedef enum __ns_opcode {
  90         ns_o_query = 0,
  91         ns_o_iquery = 1,
  92         ns_o_status = 2,
  93         ns_o_notify = 4,
  94         ns_o_update = 5,
  95         ns_o_max = 6
  96 } ns_opcode;
  97
  98 typedef enum __ns_rcode {
  99         ns_r_noerror = 0,
 100         ns_r_formerr = 1,
 101         ns_r_servfail = 2,
 102         ns_r_nxdomain = 3,
 103         ns_r_notimpl = 4,
 104         ns_r_refused = 5,
 105         ns_r_yxdomain = 6,
 106         ns_r_yxrrset = 7,
 107         ns_r_nxrrset = 8,
 108         ns_r_notauth = 9,
 109         ns_r_notzone = 10,
 110         ns_r_max = 11,
 111         ns_r_badvers = 16,
 112         ns_r_badsig = 16,
 113         ns_r_badkey = 17,
 114         ns_r_badtime = 18
 115 } ns_rcode;
 116
 117 typedef enum __ns_update_operation {
 118         ns_uop_delete = 0,
 119         ns_uop_add = 1,
 120         ns_uop_max = 2
 121 } ns_update_operation;
 122
 123 struct ns_tsig_key {
 124         char name[NS_MAXDNAME], alg[NS_MAXDNAME];
 125         unsigned char *data;
 126         int len;
 127 };
 128 typedef struct ns_tsig_key ns_tsig_key;
 129
 130 struct ns_tcp_tsig_state {
 131         int counter;
 132         struct dst_key *key;
 133         void *ctx;
 134         unsigned char sig[NS_PACKETSZ];
 135         int siglen;
 136 };
 137 typedef struct ns_tcp_tsig_state ns_tcp_tsig_state;
 138
 139 #define NS_TSIG_FUDGE 300
 140 #define NS_TSIG_TCP_COUNT 100
 141 #define NS_TSIG_ALG_HMAC_MD5 "HMAC-MD5.SIG-ALG.REG.INT"
 142
 143 #define NS_TSIG_ERROR_NO_TSIG -10
 144 #define NS_TSIG_ERROR_NO_SPACE -11
 145 #define NS_TSIG_ERROR_FORMERR -12
 146
 147 typedef enum __ns_type {
 148         ns_t_invalid = 0,
 149         ns_t_a = 1,
 150         ns_t_ns = 2,
 151         ns_t_md = 3,
 152         ns_t_mf = 4,
 153         ns_t_cname = 5,
 154         ns_t_soa = 6,
 155         ns_t_mb = 7,
 156         ns_t_mg = 8,
 157         ns_t_mr = 9,
 158         ns_t_null = 10,
 159         ns_t_wks = 11,
 160         ns_t_ptr = 12,
 161         ns_t_hinfo = 13,
 162         ns_t_minfo = 14,
 163         ns_t_mx = 15,
 164         ns_t_txt = 16,
 165         ns_t_rp = 17,
 166         ns_t_afsdb = 18,
 167         ns_t_x25 = 19,
 168         ns_t_isdn = 20,
 169         ns_t_rt = 21,
 170         ns_t_nsap = 22,
 171         ns_t_nsap_ptr = 23,
 172         ns_t_sig = 24,
 173         ns_t_key = 25,
 174         ns_t_px = 26,
 175         ns_t_gpos = 27,
 176         ns_t_aaaa = 28,
 177         ns_t_loc = 29,
 178         ns_t_nxt = 30,
 179         ns_t_eid = 31,
 180         ns_t_nimloc = 32,
 181         ns_t_srv = 33,
 182         ns_t_atma = 34,
 183         ns_t_naptr = 35,
 184         ns_t_kx = 36,
 185         ns_t_cert = 37,
 186         ns_t_a6 = 38,
 187         ns_t_dname = 39,
 188         ns_t_sink = 40,
 189         ns_t_opt = 41,
 190         ns_t_apl = 42,
 191         ns_t_tkey = 249,
 192         ns_t_tsig = 250,
 193         ns_t_ixfr = 251,
 194         ns_t_axfr = 252,
 195         ns_t_mailb = 253,
 196         ns_t_maila = 254,
 197         ns_t_any = 255,
 198         ns_t_zxfr = 256,
 199         ns_t_max = 65536
 200 } ns_type;
 201
 202 #define ns_t_qt_p(t) (ns_t_xfr_p(t) || (t) == ns_t_any || \
 203                       (t) == ns_t_mailb || (t) == ns_t_maila)
 204 #define ns_t_mrr_p(t) ((t) == ns_t_tsig || (t) == ns_t_opt)
 205 #define ns_t_rr_p(t) (!ns_t_qt_p(t) && !ns_t_mrr_p(t))
 206 #define ns_t_udp_p(t) ((t) != ns_t_axfr && (t) != ns_t_zxfr)
 207 #define ns_t_xfr_p(t) ((t) == ns_t_axfr || (t) == ns_t_ixfr || \
 208                        (t) == ns_t_zxfr)
 209
 210 typedef enum __ns_class {
 211         ns_c_invalid = 0,
 212         ns_c_in = 1,
 213         ns_c_2 = 2,
 214         ns_c_chaos = 3,
 215         ns_c_hs = 4,
 216         ns_c_none = 254,
 217         ns_c_any = 255,
 218         ns_c_max = 65536
 219 } ns_class;
 220
 221 typedef enum __ns_key_types {
 222         ns_kt_rsa = 1,
 223         ns_kt_dh  = 2,
 224         ns_kt_dsa = 3,
 225         ns_kt_private = 254
 226 } ns_key_types;
 227
 228 typedef enum __ns_cert_types {
 229         cert_t_pkix = 1,
 230         cert_t_spki = 2,
 231         cert_t_pgp  = 3,
 232         cert_t_url  = 253,
 233         cert_t_oid  = 254
 234 } ns_cert_types;
 235
 236 #define NS_KEY_TYPEMASK         0xC000
 237 #define NS_KEY_TYPE_AUTH_CONF   0x0000
 238 #define NS_KEY_TYPE_CONF_ONLY   0x8000
 239 #define NS_KEY_TYPE_AUTH_ONLY   0x4000
 240 #define NS_KEY_TYPE_NO_KEY      0xC000
 241 #define NS_KEY_NO_AUTH          0x8000
 242 #define NS_KEY_NO_CONF          0x4000
 243 #define NS_KEY_RESERVED2        0x2000
 244 #define NS_KEY_EXTENDED_FLAGS   0x1000
 245 #define NS_KEY_RESERVED4        0x0800
 246 #define NS_KEY_RESERVED5        0x0400
 247 #define NS_KEY_NAME_TYPE        0x0300
 248 #define NS_KEY_NAME_USER        0x0000
 249 #define NS_KEY_NAME_ENTITY      0x0200
 250 #define NS_KEY_NAME_ZONE        0x0100
 251 #define NS_KEY_NAME_RESERVED    0x0300
 252 #define NS_KEY_RESERVED8        0x0080
 253 #define NS_KEY_RESERVED9        0x0040
 254 #define NS_KEY_RESERVED10       0x0020
 255 #define NS_KEY_RESERVED11       0x0010
 256 #define NS_KEY_SIGNATORYMASK    0x000F
 257 #define NS_KEY_RESERVED_BITMASK ( NS_KEY_RESERVED2 | \
 258                                   NS_KEY_RESERVED4 | \
 259                                   NS_KEY_RESERVED5 | \
 260                                   NS_KEY_RESERVED8 | \
 261                                   NS_KEY_RESERVED9 | \
 262                                   NS_KEY_RESERVED10 | \
 263                                   NS_KEY_RESERVED11 )
 264 #define NS_KEY_RESERVED_BITMASK2 0xFFFF
 265 #define NS_ALG_MD5RSA           1
 266 #define NS_ALG_DH               2
 267 #define NS_ALG_DSA              3
 268 #define NS_ALG_DSS              NS_ALG_DSA
 269 #define NS_ALG_EXPIRE_ONLY      253
 270 #define NS_ALG_PRIVATE_OID      254
 271
 272 #define NS_KEY_PROT_TLS         1
 273 #define NS_KEY_PROT_EMAIL       2
 274 #define NS_KEY_PROT_DNSSEC      3
 275 #define NS_KEY_PROT_IPSEC       4
 276 #define NS_KEY_PROT_ANY         255
 277
 278 #define NS_MD5RSA_MIN_BITS       512
 279 #define NS_MD5RSA_MAX_BITS      4096
 280 #define NS_MD5RSA_MAX_BYTES     ((NS_MD5RSA_MAX_BITS+7/8)*2+3)
 281 #define NS_MD5RSA_MAX_BASE64    (((NS_MD5RSA_MAX_BYTES+2)/3)*4)
 282 #define NS_MD5RSA_MIN_SIZE      ((NS_MD5RSA_MIN_BITS+7)/8)
 283 #define NS_MD5RSA_MAX_SIZE      ((NS_MD5RSA_MAX_BITS+7)/8)
 284
 285 #define NS_DSA_SIG_SIZE         41
 286 #define NS_DSA_MIN_SIZE         213
 287 #define NS_DSA_MAX_BYTES        405
 288
 289 #define NS_SIG_TYPE     0
 290 #define NS_SIG_ALG      2
 291 #define NS_SIG_LABELS   3
 292 #define NS_SIG_OTTL     4
 293 #define NS_SIG_EXPIR    8
 294 #define NS_SIG_SIGNED   12
 295 #define NS_SIG_FOOT     16
 296 #define NS_SIG_SIGNER   18
 297 #define NS_NXT_BITS 8
 298 #define NS_NXT_BIT_SET(  n,p) (p[(n)/NS_NXT_BITS] |=  (0x80>>((n)%NS_NXT_BITS)))
 299 #define NS_NXT_BIT_CLEAR(n,p) (p[(n)/NS_NXT_BITS] &= ~(0x80>>((n)%NS_NXT_BITS)))
 300 #define NS_NXT_BIT_ISSET(n,p) (p[(n)/NS_NXT_BITS] &   (0x80>>((n)%NS_NXT_BITS)))
 301 #define NS_NXT_MAX 127
 302
 303 #define NS_OPT_DNSSEC_OK        0x8000U
 304 #define NS_OPT_NSID             3
 305
 306 #define NS_GET16(s, cp) (void)((s) = ns_get16(((cp)+=2)-2))
 307 #define NS_GET32(l, cp) (void)((l) = ns_get32(((cp)+=4)-4))
 308 #define NS_PUT16(s, cp) ns_put16((s), ((cp)+=2)-2)
 309 #define NS_PUT32(l, cp) ns_put32((l), ((cp)+=4)-4)
 310
 311 unsigned ns_get16(const unsigned char *);
 312 unsigned long ns_get32(const unsigned char *);
 313 void ns_put16(unsigned, unsigned char *);
 314 void ns_put32(unsigned long, unsigned char *);
 315
 316 int ns_initparse(const unsigned char *, int, ns_msg *);
 317 int ns_parserr(ns_msg *, ns_sect, int, ns_rr *);
 318 int ns_skiprr(const unsigned char *, const unsigned char *, ns_sect, int);
 319 int ns_name_uncompress(const unsigned char *, const unsigned char *, const unsigned char *, char *, size_t);
 320
 321
 322 #define __BIND          19950621
 323
 324 typedef struct {
 325         unsigned        id :16;
 326 #if __BYTE_ORDER == __BIG_ENDIAN
 327         unsigned        qr: 1;
 328         unsigned        opcode: 4;
 329         unsigned        aa: 1;
 330         unsigned        tc: 1;
 331         unsigned        rd: 1;
 332         unsigned        ra: 1;
 333         unsigned        unused :1;
 334         unsigned        ad: 1;
 335         unsigned        cd: 1;
 336         unsigned        rcode :4;
 337 #else
 338         unsigned        rd :1;
 339         unsigned        tc :1;
 340         unsigned        aa :1;
 341         unsigned        opcode :4;
 342         unsigned        qr :1;
 343         unsigned        rcode :4;
 344         unsigned        cd: 1;
 345         unsigned        ad: 1;
 346         unsigned        unused :1;
 347         unsigned        ra :1;
 348 #endif
 349         unsigned        qdcount :16;
 350         unsigned        ancount :16;
 351         unsigned        nscount :16;
 352         unsigned        arcount :16;
 353 } HEADER;
 354
 355 #define PACKETSZ        NS_PACKETSZ
 356 #define MAXDNAME        NS_MAXDNAME
 357 #define MAXCDNAME       NS_MAXCDNAME
 358 #define MAXLABEL        NS_MAXLABEL
 359 #define HFIXEDSZ        NS_HFIXEDSZ
 360 #define QFIXEDSZ        NS_QFIXEDSZ
 361 #define RRFIXEDSZ       NS_RRFIXEDSZ
 362 #define INT32SZ         NS_INT32SZ
 363 #define INT16SZ         NS_INT16SZ
 364 #define INT8SZ          NS_INT8SZ
 365 #define INADDRSZ        NS_INADDRSZ
 366 #define IN6ADDRSZ       NS_IN6ADDRSZ
 367 #define INDIR_MASK      NS_CMPRSFLGS
 368 #define NAMESERVER_PORT NS_DEFAULTPORT
 369
 370 #define S_ZONE          ns_s_zn
 371 #define S_PREREQ        ns_s_pr
 372 #define S_UPDATE        ns_s_ud
 373 #define S_ADDT          ns_s_ar
 374
 375 #define QUERY           ns_o_query
 376 #define IQUERY          ns_o_iquery
 377 #define STATUS          ns_o_status
 378 #define NS_NOTIFY_OP    ns_o_notify
 379 #define NS_UPDATE_OP    ns_o_update
 380
 381 #define NOERROR         ns_r_noerror
 382 #define FORMERR         ns_r_formerr
 383 #define SERVFAIL        ns_r_servfail
 384 #define NXDOMAIN        ns_r_nxdomain
 385 #define NOTIMP          ns_r_notimpl
 386 #define REFUSED         ns_r_refused
 387 #define YXDOMAIN        ns_r_yxdomain
 388 #define YXRRSET         ns_r_yxrrset
 389 #define NXRRSET         ns_r_nxrrset
 390 #define NOTAUTH         ns_r_notauth
 391 #define NOTZONE         ns_r_notzone
 392
 393 #define DELETE          ns_uop_delete
 394 #define ADD             ns_uop_add
 395
 396 #define T_A             ns_t_a
 397 #define T_NS            ns_t_ns
 398 #define T_MD            ns_t_md
 399 #define T_MF            ns_t_mf
 400 #define T_CNAME         ns_t_cname
 401 #define T_SOA           ns_t_soa
 402 #define T_MB            ns_t_mb
 403 #define T_MG            ns_t_mg
 404 #define T_MR            ns_t_mr
 405 #define T_NULL          ns_t_null
 406 #define T_WKS           ns_t_wks
 407 #define T_PTR           ns_t_ptr
 408 #define T_HINFO         ns_t_hinfo
 409 #define T_MINFO         ns_t_minfo
 410 #define T_MX            ns_t_mx
 411 #define T_TXT           ns_t_txt
 412 #define T_RP            ns_t_rp
 413 #define T_AFSDB         ns_t_afsdb
 414 #define T_X25           ns_t_x25
 415 #define T_ISDN          ns_t_isdn
 416 #define T_RT            ns_t_rt
 417 #define T_NSAP          ns_t_nsap
 418 #define T_NSAP_PTR      ns_t_nsap_ptr
 419 #define T_SIG           ns_t_sig
 420 #define T_KEY           ns_t_key
 421 #define T_PX            ns_t_px
 422 #define T_GPOS          ns_t_gpos
 423 #define T_AAAA          ns_t_aaaa
 424 #define T_LOC           ns_t_loc
 425 #define T_NXT           ns_t_nxt
 426 #define T_EID           ns_t_eid
 427 #define T_NIMLOC        ns_t_nimloc
 428 #define T_SRV           ns_t_srv
 429 #define T_ATMA          ns_t_atma
 430 #define T_NAPTR         ns_t_naptr
 431 #define T_A6            ns_t_a6
 432 #define T_DNAME         ns_t_dname
 433 #define T_TSIG          ns_t_tsig
 434 #define T_IXFR          ns_t_ixfr
 435 #define T_AXFR          ns_t_axfr
 436 #define T_MAILB         ns_t_mailb
 437 #define T_MAILA         ns_t_maila
 438 #define T_ANY           ns_t_any
 439
 440 #define C_IN            ns_c_in
 441 #define C_CHAOS         ns_c_chaos
 442 #define C_HS            ns_c_hs
 443 #define C_NONE          ns_c_none
 444 #define C_ANY           ns_c_any
 445
 446 #define GETSHORT                NS_GET16
 447 #define GETLONG                 NS_GET32
 448 #define PUTSHORT                NS_PUT16
 449 #define PUTLONG                 NS_PUT32
 450
 451 #ifdef __cplusplus
 452 }
 453 #endif
 454
 455 #endif