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nameser.h
/* * Copyright (c) 1983, 1989, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") * Copyright (c) 1996-1999 by Internet Software Consortium. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS * SOFTWARE. */ #ifndef _ARPA_NAMESER_H_ #define _ARPA_NAMESER_H_ #include <sys/param.h> #include <sys/types.h> #include <stdint.h> /* * Define constants based on RFC 883, RFC 1034, RFC 1035 */ #define NS_PACKETSZ 512 /*%< default UDP packet size */ #define NS_MAXDNAME 1025 /*%< maximum domain name */ #define NS_MAXMSG 65535 /*%< maximum message size */ #define NS_MAXCDNAME 255 /*%< maximum compressed domain name */ #define NS_MAXLABEL 63 /*%< maximum length of domain label */ #define NS_HFIXEDSZ 12 /*%< #/bytes of fixed data in header */ #define NS_QFIXEDSZ 4 /*%< #/bytes of fixed data in query */ #define NS_RRFIXEDSZ 10 /*%< #/bytes of fixed data in r record */ #define NS_INT32SZ 4 /*%< #/bytes of data in a uint32_t */ #define NS_INT16SZ 2 /*%< #/bytes of data in a uint16_t */ #define NS_INT8SZ 1 /*%< #/bytes of data in a uint8_t */ #define NS_INADDRSZ 4 /*%< IPv4 T_A */ #define NS_IN6ADDRSZ 16 /*%< IPv6 T_AAAA */ #define NS_CMPRSFLGS 0xc0 /*%< Flag bits indicating name compression. */ #define NS_DEFAULTPORT 53 /*%< For both TCP and UDP. */ /* * These can be expanded with synonyms, just keep ns_parse.c:ns_parserecord() * in synch with it. */ typedef enum __ns_sect { ns_s_qd = 0, /*%< Query: Question. */ ns_s_zn = 0, /*%< Update: Zone. */ ns_s_an = 1, /*%< Query: Answer. */ ns_s_pr = 1, /*%< Update: Prerequisites. */ ns_s_ns = 2, /*%< Query: Name servers. */ ns_s_ud = 2, /*%< Update: Update. */ ns_s_ar = 3, /*%< Query|Update: Additional records. */ ns_s_max = 4 } ns_sect; /*% * This is a message handle. It is caller allocated and has no dynamic data. * This structure is intended to be opaque to all but ns_parse.c, thus the * leading _'s on the member names. Use the accessor functions, not the _'s. */ typedef struct __ns_msg { const unsigned char *_msg, *_eom; uint16_t _id, _flags, _counts[ns_s_max]; const unsigned char *_sections[ns_s_max]; ns_sect _sect; int _rrnum; const unsigned char *_msg_ptr; } ns_msg; /* Private data structure - do not use from outside library. */ struct _ns_flagdata { int mask, shift; }; extern const struct _ns_flagdata _ns_flagdata[]; /* Accessor macros - this is part of the public interface. */ #define ns_msg_id(handle) ((handle)._id + 0) #define ns_msg_base(handle) ((handle)._msg + 0) #define ns_msg_end(handle) ((handle)._eom + 0) #define ns_msg_size(handle) ((handle)._eom - (handle)._msg) #define ns_msg_count(handle, section) ((handle)._counts[section] + 0) /*% * This is a parsed record. It is caller allocated and has no dynamic data. */ typedef struct __ns_rr { char name[NS_MAXDNAME]; uint16_t type; uint16_t rr_class; uint32_t ttl; uint16_t rdlength; const unsigned char * rdata; } ns_rr; /* Accessor macros - this is part of the public interface. */ #define ns_rr_name(rr) (((rr).name[0] != '\0') ? (rr).name : ".") #define ns_rr_type(rr) ((ns_type)((rr).type + 0)) #define ns_rr_class(rr) ((ns_class)((rr).rr_class + 0)) #define ns_rr_ttl(rr) ((rr).ttl + 0) #define ns_rr_rdlen(rr) ((rr).rdlength + 0) #define ns_rr_rdata(rr) ((rr).rdata + 0) /*% * These don't have to be in the same order as in the packet flags word, * and they can even overlap in some cases, but they will need to be kept * in synch with ns_parse.c:ns_flagdata[]. */ typedef enum __ns_flag { ns_f_qr, /*%< Question/Response. */ ns_f_opcode, /*%< Operation code. */ ns_f_aa, /*%< Authoritative Answer. */ ns_f_tc, /*%< Truncation occurred. */ ns_f_rd, /*%< Recursion Desired. */ ns_f_ra, /*%< Recursion Available. */ ns_f_z, /*%< MBZ. */ ns_f_ad, /*%< Authentic Data (DNSSEC). */ ns_f_cd, /*%< Checking Disabled (DNSSEC). */ ns_f_rcode, /*%< Response code. */ ns_f_max } ns_flag; /*% * Currently defined opcodes. */ typedef enum __ns_opcode { ns_o_query = 0, /*%< Standard query. */ ns_o_iquery = 1, /*%< Inverse query (deprecated/unsupported). */ ns_o_status = 2, /*%< Name server status query (unsupported). */ /* Opcode 3 is undefined/reserved. */ ns_o_notify = 4, /*%< Zone change notification. */ ns_o_update = 5, /*%< Zone update message. */ ns_o_max = 6 } ns_opcode; /*% * Currently defined response codes. */ typedef enum __ns_rcode { ns_r_noerror = 0, /*%< No error occurred. */ ns_r_formerr = 1, /*%< Format error. */ ns_r_servfail = 2, /*%< Server failure. */ ns_r_nxdomain = 3, /*%< Name error. */ ns_r_notimpl = 4, /*%< Unimplemented. */ ns_r_refused = 5, /*%< Operation refused. */ /* these are for BIND_UPDATE */ ns_r_yxdomain = 6, /*%< Name exists */ ns_r_yxrrset = 7, /*%< RRset exists */ ns_r_nxrrset = 8, /*%< RRset does not exist */ ns_r_notauth = 9, /*%< Not authoritative for zone */ ns_r_notzone = 10, /*%< Zone of record different from zone section */ ns_r_max = 11, /* The following are EDNS extended rcodes */ ns_r_badvers = 16, /* The following are TSIG errors */ ns_r_badsig = 16, ns_r_badkey = 17, ns_r_badtime = 18 } ns_rcode; /* BIND_UPDATE */ typedef enum __ns_update_operation { ns_uop_delete = 0, ns_uop_add = 1, ns_uop_max = 2 } ns_update_operation; /*% * This structure is used for TSIG authenticated messages */ struct ns_tsig_key { char name[NS_MAXDNAME], alg[NS_MAXDNAME]; unsigned char *data; int len; }; typedef struct ns_tsig_key ns_tsig_key; /*% * This structure is used for TSIG authenticated TCP messages */ struct ns_tcp_tsig_state { int counter; struct dst_key *key; void *ctx; unsigned char sig[NS_PACKETSZ]; int siglen; }; typedef struct ns_tcp_tsig_state ns_tcp_tsig_state; #define NS_TSIG_FUDGE 300 #define NS_TSIG_TCP_COUNT 100 #define NS_TSIG_ALG_HMAC_MD5 "HMAC-MD5.SIG-ALG.REG.INT" #define NS_TSIG_ERROR_NO_TSIG -10 #define NS_TSIG_ERROR_NO_SPACE -11 #define NS_TSIG_ERROR_FORMERR -12 /*% * Currently defined type values for resources and queries. */ typedef enum __ns_type { ns_t_invalid = 0, ns_t_a = 1, ns_t_ns = 2, ns_t_md = 3, ns_t_mf = 4, ns_t_cname = 5, ns_t_soa = 6, ns_t_mb = 7, ns_t_mg = 8, ns_t_mr = 9, ns_t_null = 10, ns_t_wks = 11, ns_t_ptr = 12, ns_t_hinfo = 13, ns_t_minfo = 14, ns_t_mx = 15, ns_t_txt = 16, ns_t_rp = 17, ns_t_afsdb = 18, ns_t_x25 = 19, ns_t_isdn = 20, ns_t_rt = 21, ns_t_nsap = 22, ns_t_nsap_ptr = 23, ns_t_sig = 24, ns_t_key = 25, ns_t_px = 26, ns_t_gpos = 27, ns_t_aaaa = 28, ns_t_loc = 29, ns_t_nxt = 30, ns_t_eid = 31, ns_t_nimloc = 32, ns_t_srv = 33, ns_t_atma = 34, ns_t_naptr = 35, ns_t_kx = 36, ns_t_cert = 37, ns_t_a6 = 38, ns_t_dname = 39, ns_t_sink = 40, ns_t_opt = 41, ns_t_apl = 42, ns_t_ds = 43, ns_t_sshfp = 44, ns_t_ipseckey = 45, ns_t_rrsig = 46, ns_t_nsec = 47, ns_t_dnskey = 48, ns_t_dhcid = 49, ns_t_nsec3 = 50, ns_t_nsec3param = 51, ns_t_tlsa = 52, ns_t_smimea = 53, ns_t_hip = 55, ns_t_ninfo = 56, ns_t_rkey = 57, ns_t_talink = 58, ns_t_cds = 59, ns_t_cdnskey = 60, ns_t_openpgpkey = 61, ns_t_csync = 62, ns_t_spf = 99, ns_t_uinfo = 100, ns_t_uid = 101, ns_t_gid = 102, ns_t_unspec = 103, ns_t_nid = 104, ns_t_l32 = 105, ns_t_l64 = 106, ns_t_lp = 107, ns_t_eui48 = 108, ns_t_eui64 = 109, ns_t_tkey = 249, ns_t_tsig = 250, ns_t_ixfr = 251, ns_t_axfr = 252, ns_t_mailb = 253, ns_t_maila = 254, ns_t_any = 255, ns_t_uri = 256, ns_t_caa = 257, ns_t_avc = 258, ns_t_ta = 32768, ns_t_dlv = 32769, ns_t_max = 65536 } ns_type; /*% * Values for class field */ typedef enum __ns_class { ns_c_invalid = 0, /*%< Cookie. */ ns_c_in = 1, /*%< Internet. */ ns_c_2 = 2, /*%< unallocated/unsupported. */ ns_c_chaos = 3, /*%< MIT Chaos-net. */ ns_c_hs = 4, /*%< MIT Hesiod. */ /* Query class values which do not appear in resource records */ ns_c_none = 254, /*%< for prereq. sections in update requests */ ns_c_any = 255, /*%< Wildcard match. */ ns_c_max = 65536 } ns_class; /* Certificate type values in CERT resource records. */ typedef enum __ns_cert_types { cert_t_pkix = 1, /*%< PKIX (X.509v3) */ cert_t_spki = 2, /*%< SPKI */ cert_t_pgp = 3, /*%< PGP */ cert_t_url = 253, /*%< URL private type */ cert_t_oid = 254 /*%< OID private type */ } ns_cert_types; /*% * EDNS0 extended flags and option codes, host order. */ #define NS_OPT_DNSSEC_OK 0x8000U #define NS_OPT_NSID 3 /*% * Inline versions of get/put short/long. Pointer is advanced. */ #define NS_GET16(s, cp) do { \ const unsigned char *t_cp = (const unsigned char *)(cp); \ (s) = ((uint16_t)t_cp[0] << 8) \ | ((uint16_t)t_cp[1]) \ ; \ (cp) += NS_INT16SZ; \ } while (0) #define NS_GET32(l, cp) do { \ const unsigned char *t_cp = (const unsigned char *)(cp); \ (l) = ((uint32_t)t_cp[0] << 24) \ | ((uint32_t)t_cp[1] << 16) \ | ((uint32_t)t_cp[2] << 8) \ | ((uint32_t)t_cp[3]) \ ; \ (cp) += NS_INT32SZ; \ } while (0) #define NS_PUT16(s, cp) do { \ uint16_t t_s = (uint16_t)(s); \ unsigned char *t_cp = (unsigned char *)(cp); \ *t_cp++ = t_s >> 8; \ *t_cp = t_s; \ (cp) += NS_INT16SZ; \ } while (0) #define NS_PUT32(l, cp) do { \ uint32_t t_l = (uint32_t)(l); \ unsigned char *t_cp = (unsigned char *)(cp); \ *t_cp++ = t_l >> 24; \ *t_cp++ = t_l >> 16; \ *t_cp++ = t_l >> 8; \ *t_cp = t_l; \ (cp) += NS_INT32SZ; \ } while (0) __BEGIN_DECLS int ns_msg_getflag (ns_msg, int) __THROW; unsigned int ns_get16 (const unsigned char *) __THROW; unsigned long ns_get32 (const unsigned char *) __THROW; void ns_put16 (unsigned int, unsigned char *) __THROW; void ns_put32 (unsigned long, unsigned char *) __THROW; int ns_initparse (const unsigned char *, int, ns_msg *) __THROW; int ns_skiprr (const unsigned char *, const unsigned char *, ns_sect, int) __THROW; int ns_parserr (ns_msg *, ns_sect, int, ns_rr *) __THROW; int ns_sprintrr (const ns_msg *, const ns_rr *, const char *, const char *, char *, size_t) __THROW; int ns_sprintrrf (const unsigned char *, size_t, const char *, ns_class, ns_type, unsigned long, const unsigned char *, size_t, const char *, const char *, char *, size_t) __THROW; int ns_format_ttl (unsigned long, char *, size_t) __THROW; int ns_parse_ttl (const char *, unsigned long *) __THROW; uint32_t ns_datetosecs (const char *, int *) __THROW; int ns_name_ntol (const unsigned char *, unsigned char *, size_t) __THROW; int ns_name_ntop (const unsigned char *, char *, size_t) __THROW; int ns_name_pton (const char *, unsigned char *, size_t) __THROW; int ns_name_unpack (const unsigned char *, const unsigned char *, const unsigned char *, unsigned char *, size_t) __THROW; int ns_name_pack (const unsigned char *, unsigned char *, int, const unsigned char **, const unsigned char **) __THROW; int ns_name_uncompress (const unsigned char *, const unsigned char *, const unsigned char *, char *, size_t) __THROW; int ns_name_compress (const char *, unsigned char *, size_t, const unsigned char **, const unsigned char **) __THROW; int ns_name_skip (const unsigned char **, const unsigned char *) __THROW; void ns_name_rollback (const unsigned char *, const unsigned char **, const unsigned char **) __THROW; int ns_samedomain (const char *, const char *) __THROW; int ns_subdomain (const char *, const char *) __THROW; int ns_makecanon (const char *, char *, size_t) __THROW; int ns_samename (const char *, const char *) __THROW; __END_DECLS #include <arpa/nameser_compat.h> #endif /* !_ARPA_NAMESER_H_ */ /*! \file */
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