1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
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;
/*! @} */
|
