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Diffstat (limited to 'nameser.h')
| -rw-r--r-- | nameser.h | 303 |
1 files changed, 303 insertions, 0 deletions
diff --git a/nameser.h b/nameser.h new file mode 100644 index 0000000..526c60c --- /dev/null +++ b/nameser.h @@ -0,0 +1,303 @@ +/* + * 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_ */ |