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| -rw-r--r-- | src/libknot/consts.h | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/src/libknot/consts.h b/src/libknot/consts.h new file mode 100644 index 0000000..e6041b7 --- /dev/null +++ b/src/libknot/consts.h @@ -0,0 +1,163 @@ +/* Copyright (C) 2023 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz> + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +/*! + * \file + * + * \brief Some DNS-related constants. + * + * \addtogroup libknot + * @{ + */ + +#pragma once + +/*! + * \brief Basic limits for domain names (RFC 1035). + */ +#define KNOT_DNAME_MAXLEN 255 /*!< 1-byte maximum. */ +#define KNOT_DNAME_MAXLABELS 127 /*!< 1-char labels. */ +#define KNOT_DNAME_MAXLABELLEN 63 /*!< 2^6 - 1 */ + +/*! + * \brief The longest textual dname representation. + * + * Binary: 3 x (0x3F + maximum_label) + (0x3D + rest_label) + (0x00) + * Textual: 3 x (maximum_label + '.') + (rest_label + '.') + * + * Each dname label byte takes 4 characters (\\DDD). + * + * KNOT_DNAME_TXT_MAXLEN = 3 x (63 x 4 + 1) + (61 x 4 + 1) + */ +#define KNOT_DNAME_TXT_MAXLEN 1004 + +/*! + * \brief Address family numbers. + * + * https://www.iana.org/assignments/address-family-numbers/address-family-numbers.xml + */ +typedef enum { + KNOT_ADDR_FAMILY_IPV4 = 1, /*!< IP version 4. */ + KNOT_ADDR_FAMILY_IPV6 = 2 /*!< IP version 6. */ +} knot_addr_family_t; + +/*! + * \brief DNS operation codes (OPCODEs). + * + * https://www.iana.org/assignments/dns-parameters/dns-parameters.xml + */ +typedef enum { + KNOT_OPCODE_QUERY = 0, /*!< Standard query. */ + KNOT_OPCODE_IQUERY = 1, /*!< Inverse query. */ + KNOT_OPCODE_STATUS = 2, /*!< Server status request. */ + KNOT_OPCODE_NOTIFY = 4, /*!< Notify message. */ + KNOT_OPCODE_UPDATE = 5 /*!< Dynamic update. */ +} knot_opcode_t; + +/*! + * \brief DNS reply codes (RCODEs). + * + * https://www.iana.org/assignments/dns-parameters/dns-parameters.xml + */ +typedef enum { + KNOT_RCODE_NOERROR = 0, /*!< No error. */ + KNOT_RCODE_FORMERR = 1, /*!< Format error. */ + KNOT_RCODE_SERVFAIL = 2, /*!< Server failure. */ + KNOT_RCODE_NXDOMAIN = 3, /*!< Non-existent domain. */ + KNOT_RCODE_NOTIMPL = 4, /*!< Not implemented. */ + KNOT_RCODE_REFUSED = 5, /*!< Refused. */ + KNOT_RCODE_YXDOMAIN = 6, /*!< Name should not exist. */ + KNOT_RCODE_YXRRSET = 7, /*!< RR set should not exist. */ + KNOT_RCODE_NXRRSET = 8, /*!< RR set does not exist. */ + KNOT_RCODE_NOTAUTH = 9, /*!< Server not authoritative. / Query not authorized. */ + KNOT_RCODE_NOTZONE = 10, /*!< Name is not inside zone. */ + KNOT_RCODE_BADVERS = 16, /*!< Bad OPT Version. */ + KNOT_RCODE_BADSIG = 16, /*!< (TSIG) Signature failure. */ + KNOT_RCODE_BADKEY = 17, /*!< (TSIG) Key is not supported. */ + KNOT_RCODE_BADTIME = 18, /*!< (TSIG) Signature out of time window. */ + KNOT_RCODE_BADMODE = 19, /*!< (TKEY) Bad mode. */ + KNOT_RCODE_BADNAME = 20, /*!< (TKEY) Duplicate key name. */ + KNOT_RCODE_BADALG = 21, /*!< (TKEY) Algorithm not supported. */ + KNOT_RCODE_BADTRUNC = 22, /*!< (TSIG) Bad truncation. */ + KNOT_RCODE_BADCOOKIE = 23 /*!< Bad/missing server cookie. */ +} knot_rcode_t; + +/*! + * \brief Extended error codes as in EDNS option #15. + * + * \note The default -1 value must be filtered out before storing to uint16_t! + * + * https://www.iana.org/assignments/dns-parameters/dns-parameters.xml#extended-dns-error-codes + */ +typedef enum { + KNOT_EDNS_EDE_NONE = -1, + KNOT_EDNS_EDE_OTHER = 0, + KNOT_EDNS_EDE_DNSKEY_ALG = 1, + KNOT_EDNS_EDE_DS_DIGEST = 2, + KNOT_EDNS_EDE_STALE = 3, + KNOT_EDNS_EDE_FORGED = 4, + KNOT_EDNS_EDE_INDETERMINATE = 5, + KNOT_EDNS_EDE_BOGUS = 6, + KNOT_EDNS_EDE_SIG_EXPIRED = 7, + KNOT_EDNS_EDE_SIG_NOTYET = 8, + KNOT_EDNS_EDE_DNSKEY_MISS = 9, + KNOT_EDNS_EDE_RRSIG_MISS = 10, + KNOT_EDNS_EDE_DNSKEY_BIT = 11, + KNOT_EDNS_EDE_NSEC_MISS = 12, + KNOT_EDNS_EDE_CACHED_ERR = 13, + KNOT_EDNS_EDE_NOT_READY = 14, + KNOT_EDNS_EDE_BLOCKED = 15, + KNOT_EDNS_EDE_CENSORED = 16, + KNOT_EDNS_EDE_FILTERED = 17, + KNOT_EDNS_EDE_PROHIBITED = 18, + KNOT_EDNS_EDE_STALE_NXD = 19, + KNOT_EDNS_EDE_NOTAUTH = 20, + KNOT_EDNS_EDE_NOTSUP = 21, + KNOT_EDNS_EDE_NREACH_AUTH = 22, + KNOT_EDNS_EDE_NETWORK = 23, + KNOT_EDNS_EDE_INV_DATA = 24, + KNOT_EDNS_EDE_EXPIRED_INV = 25, + KNOT_EDNS_EDE_TOO_EARLY = 26, + KNOT_EDNS_EDE_NSEC3_ITERS = 27, + KNOT_EDNS_EDE_NONCONF_POLICY = 28, + KNOT_EDNS_EDE_SYNTHESIZED = 29, +} knot_edns_ede_t; + +/*! + * \brief DNS packet section identifiers. + */ +typedef enum { + KNOT_ANSWER = 0, + KNOT_AUTHORITY = 1, + KNOT_ADDITIONAL = 2 +} knot_section_t; + +/*! + * \brief Service Binding (SVCB) Parameter Registry + * + * https://tools.ietf.org/html/draft-ietf-dnsop-svcb-https-05 // FIXME + */ +typedef enum { + KNOT_SVCB_PARAM_MANDATORY = 0, + KNOT_SVCB_PARAM_ALPN = 1, + KNOT_SVCB_PARAM_NDALPN = 2, + KNOT_SVCB_PARAM_PORT = 3, + KNOT_SVCB_PARAM_IPV4HINT = 4, + KNOT_SVCB_PARAM_ECH = 5, + KNOT_SVCB_PARAM_IPV6HINT = 6, +} knot_svcb_param_t; + +/*! @} */ |