| /* |
| * 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. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * This product includes software developed by the University of |
| * California, Berkeley and its contributors. |
| * 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. |
| * |
| * @(#)nameser.h 8.2 (Berkeley) 2/16/94 |
| * - |
| * Portions Copyright (c) 1993 by Digital Equipment Corporation. |
| * |
| * 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, and that |
| * the name of Digital Equipment Corporation not be used in advertising or |
| * publicity pertaining to distribution of the document or software without |
| * specific, written prior permission. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL |
| * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT |
| * CORPORATION 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. |
| * - |
| * --Copyright-- |
| */ |
| |
| #ifndef _NAMESER_H_ |
| #define _NAMESER_H_ |
| |
| #include <sys/types.h> |
| |
| /* |
| * Define constants based on rfc883 |
| */ |
| #define PACKETSZ 512 /* maximum packet size */ |
| #define MAXDNAME 256 /* maximum domain name */ |
| #define MAXCDNAME 255 /* maximum compressed domain name */ |
| #define MAXLABEL 63 /* maximum length of domain label */ |
| /* Number of bytes of fixed size data in query structure */ |
| #define QFIXEDSZ 4 |
| /* number of bytes of fixed size data in resource record */ |
| #define RRFIXEDSZ 10 |
| |
| /* |
| * Currently defined opcodes |
| */ |
| #define QUERY 0x0 /* standard query */ |
| #define IQUERY 0x1 /* inverse query */ |
| #define STATUS 0x2 /* nameserver status query */ |
| #if 0 |
| #define xxx 0x3 /* 0x3 reserved */ |
| #endif |
| /* non standard - supports ALLOW_UPDATES stuff from Mike Schwartz */ |
| #define UPDATEA 0x9 /* add resource record */ |
| #define UPDATED 0xa /* delete a specific resource record */ |
| #define UPDATEDA 0xb /* delete all named resource record */ |
| #define UPDATEM 0xc /* modify a specific resource record */ |
| #define UPDATEMA 0xd /* modify all named resource record */ |
| |
| #define ZONEINIT 0xe /* initial zone transfer */ |
| #define ZONEREF 0xf /* incremental zone referesh */ |
| |
| /* |
| * Undefine various #defines from various System V-flavored OSes (Solaris, |
| * SINIX, HP-UX) so the compiler doesn't whine that we redefine them. |
| */ |
| #ifdef T_NULL |
| #undef T_NULL |
| #endif |
| #ifdef T_OPT |
| #undef T_OPT |
| #endif |
| #ifdef T_UNSPEC |
| #undef T_UNSPEC |
| #endif |
| #ifdef NOERROR |
| #undef NOERROR |
| #endif |
| |
| /* |
| * Currently defined response codes |
| */ |
| #define NOERROR 0 /* no error */ |
| #define FORMERR 1 /* format error */ |
| #define SERVFAIL 2 /* server failure */ |
| #define NXDOMAIN 3 /* non existent domain */ |
| #define NOTIMP 4 /* not implemented */ |
| #define REFUSED 5 /* query refused */ |
| /* non standard */ |
| #define NOCHANGE 0xf /* update failed to change db */ |
| |
| /* |
| * Type values for resources and queries |
| */ |
| #define T_A 1 /* host address */ |
| #define T_NS 2 /* authoritative server */ |
| #define T_MD 3 /* mail destination */ |
| #define T_MF 4 /* mail forwarder */ |
| #define T_CNAME 5 /* connonical name */ |
| #define T_SOA 6 /* start of authority zone */ |
| #define T_MB 7 /* mailbox domain name */ |
| #define T_MG 8 /* mail group member */ |
| #define T_MR 9 /* mail rename name */ |
| #define T_NULL 10 /* null resource record */ |
| #define T_WKS 11 /* well known service */ |
| #define T_PTR 12 /* domain name pointer */ |
| #define T_HINFO 13 /* host information */ |
| #define T_MINFO 14 /* mailbox information */ |
| #define T_MX 15 /* mail routing information */ |
| #define T_TXT 16 /* text strings */ |
| #define T_RP 17 /* responsible person */ |
| #define T_AFSDB 18 /* AFS cell database */ |
| #define T_X25 19 /* X_25 calling address */ |
| #define T_ISDN 20 /* ISDN calling address */ |
| #define T_RT 21 /* router */ |
| #define T_NSAP 22 /* NSAP address */ |
| #define T_NSAP_PTR 23 /* reverse lookup for NSAP */ |
| #define T_SIG 24 /* security signature */ |
| #define T_KEY 25 /* security key */ |
| #define T_PX 26 /* X.400 mail mapping */ |
| #define T_GPOS 27 /* geographical position (withdrawn) */ |
| #define T_AAAA 28 /* IP6 Address */ |
| #define T_LOC 29 /* Location Information */ |
| #define T_NXT 30 /* Next Valid Name in Zone */ |
| #define T_EID 31 /* Endpoint identifier */ |
| #define T_NIMLOC 32 /* Nimrod locator */ |
| #define T_SRV 33 /* Server selection */ |
| #define T_ATMA 34 /* ATM Address */ |
| #define T_NAPTR 35 /* Naming Authority PoinTeR */ |
| #define T_KX 36 /* Key Exchanger */ |
| #define T_CERT 37 /* Certificates in the DNS */ |
| #define T_A6 38 /* IP6 address */ |
| #define T_DNAME 39 /* non-terminal redirection */ |
| #define T_SINK 40 /* unknown */ |
| #define T_OPT 41 /* EDNS0 option (meta-RR) */ |
| #define T_APL 42 /* lists of address prefixes */ |
| #define T_DS 43 /* Delegation Signer */ |
| #define T_SSHFP 44 /* SSH Fingerprint */ |
| #define T_IPSECKEY 45 /* IPsec keying material */ |
| #define T_RRSIG 46 /* new security signature */ |
| #define T_NSEC 47 /* provable insecure information */ |
| #define T_DNSKEY 48 /* new security key */ |
| /* non standard */ |
| #define T_SPF 99 /* sender policy framework */ |
| #define T_UINFO 100 /* user (finger) information */ |
| #define T_UID 101 /* user ID */ |
| #define T_GID 102 /* group ID */ |
| #define T_UNSPEC 103 /* Unspecified format (binary data) */ |
| #define T_UNSPECA 104 /* "unspecified ASCII". Ugly MIT hack */ |
| /* Query type values which do not appear in resource records */ |
| #define T_TKEY 249 /* Transaction Key [RFC2930] */ |
| #define T_TSIG 250 /* Transaction Signature [RFC2845] */ |
| #define T_IXFR 251 /* incremental transfer [RFC1995] */ |
| #define T_AXFR 252 /* transfer zone of authority */ |
| #define T_MAILB 253 /* transfer mailbox records */ |
| #define T_MAILA 254 /* transfer mail agent records */ |
| #define T_ANY 255 /* wildcard match */ |
| #define T_URI 256 /* uri records [RFC7553] */ |
| |
| /* |
| * Values for class field |
| */ |
| |
| #define C_IN 1 /* the arpa internet */ |
| #define C_CHAOS 3 /* for chaos net (MIT) */ |
| #define C_HS 4 /* for Hesiod name server (MIT) (XXX) */ |
| /* Query class values which do not appear in resource records */ |
| #define C_ANY 255 /* wildcard match */ |
| #define C_QU 0x8000 /* mDNS QU flag in queries */ |
| #define C_CACHE_FLUSH 0x8000 /* mDNS cache flush flag in replies */ |
| |
| /* |
| * Values for EDNS option types |
| */ |
| #define E_LLQ 1 /* long lived queries protocol */ |
| #define E_UL 2 /* dynamic dns update leases */ |
| #define E_NSID 3 /* name server identifier */ |
| #define E_DAU 5 /* signal DNSSEC algorithm understood */ |
| #define E_DHU 6 /* signal DS hash understood */ |
| #define E_N3U 7 /* signal NSEC3 hash understood */ |
| #define E_ECS 8 /* EDNS client subnet */ |
| #define E_EXPIRE 9 /* zone expiration */ |
| #define E_COOKIE 10 /* DNS cookies */ |
| #define E_KEEPALIVE 11 /* TCP keepalive */ |
| #define E_PADDING 12 /* pad DNS messages */ |
| #define E_CHAIN 13 /* chain DNS queries */ |
| #define E_KEYTAG 14 /* EDNS key tag */ |
| #define E_CLIENTTAG 16 /* EDNS client tag */ |
| #define E_SERVERTAG 17 /* EDNS server tag */ |
| |
| /* |
| * Values for DNSSEC Algorithms |
| * https://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml |
| */ |
| |
| #define A_DELETE 0 |
| #define A_RSAMD5 1 |
| #define A_DH 2 |
| #define A_DSA 3 |
| #define A_RSASHA1 5 |
| #define A_DSA_NSEC3_SHA1 6 |
| #define A_RSASHA1_NSEC3_SHA1 7 |
| #define A_RSASHA256 8 |
| #define A_RSASHA512 10 |
| #define A_ECC_GOST 12 |
| #define A_ECDSAP256SHA256 13 |
| #define A_ECDSAP384SHA384 14 |
| #define A_ED25519 15 |
| #define A_ED448 16 |
| #define A_INDIRECT 252 |
| #define A_PRIVATEDNS 253 |
| #define A_PRIVATEOID 254 |
| |
| /* |
| * Values for NSEC3 algorithms |
| * https://www.iana.org/assignments/dnssec-nsec3-parameters/dnssec-nsec3-parameters.xhtml |
| */ |
| #define NSEC_SHA1 1 |
| |
| /* |
| * Values for delegation signer algorithms |
| * https://www.iana.org/assignments/ds-rr-types/ds-rr-types.xhtml |
| */ |
| #define DS_SHA1 1 |
| #define DS_SHA256 2 |
| #define DS_GOST 3 |
| #define DS_SHA384 4 |
| |
| |
| /* |
| * Status return codes for T_UNSPEC conversion routines |
| */ |
| #define CONV_SUCCESS 0 |
| #define CONV_OVERFLOW -1 |
| #define CONV_BADFMT -2 |
| #define CONV_BADCKSUM -3 |
| #define CONV_BADBUFLEN -4 |
| |
| /* |
| * Structure for query header. |
| */ |
| typedef struct { |
| nd_uint16_t id; /* query identification number */ |
| nd_uint16_t flags; /* QR, Opcode, AA, TC, RD, RA, RCODE */ |
| nd_uint16_t qdcount; /* number of question entries */ |
| nd_uint16_t ancount; /* number of answer entries */ |
| nd_uint16_t nscount; /* number of authority entries */ |
| nd_uint16_t arcount; /* number of resource entries */ |
| } dns_header_t; |
| |
| /* |
| * Macros for subfields of flag fields. |
| */ |
| #define DNS_QR(flags) ((flags) & 0x8000) /* response flag */ |
| #define DNS_OPCODE(flags) (((flags) >> 11) & 0xF) /* purpose of message */ |
| #define DNS_AA(flags) (flags & 0x0400) /* authoritative answer */ |
| #define DNS_TC(flags) (flags & 0x0200) /* truncated message */ |
| #define DNS_RD(flags) (flags & 0x0100) /* recursion desired */ |
| #define DNS_RA(flags) (flags & 0x0080) /* recursion available */ |
| #define DNS_AD(flags) (flags & 0x0020) /* authentic data from named */ |
| #define DNS_CD(flags) (flags & 0x0010) /* checking disabled by resolver */ |
| #define DNS_RCODE(flags) (flags & 0x000F) /* response code */ |
| |
| /* |
| * Defines for handling compressed domain names, EDNS0 labels, etc. |
| */ |
| #define TYPE_MASK 0xc0 /* mask for the type bits of the item */ |
| #define TYPE_INDIR 0xc0 /* 11.... - pointer */ |
| #define TYPE_RESERVED 0x80 /* 10.... - reserved */ |
| #define TYPE_EDNS0 0x40 /* 01.... - EDNS(0) label */ |
| #define TYPE_LABEL 0x00 /* 00.... - regular label */ |
| # define EDNS0_ELT_BITLABEL 0x01 |
| |
| #endif /* !_NAMESER_H_ */ |
