domain/base/iana/
exterr.rs

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
164
165
166
167
168
169
170
171
172
//! Extended DNS Error

//------------ Extended Error Code -------------------------------------------

int_enum! {
    /// Extended DNS error codes.
    ///
    /// A complementary data can be put in EDNS opt, providing
    /// additional information about the cause of DNS errors. Defined
    /// in [RFC 8914]. Current registered values can be found in [IANA
    /// registry].
    ///
    /// [RFC 8914]: https://tools.ietf.org/html/rfc8914
    /// [IANA registry]: https://www.iana.org/assignments/dns-parameters/dns-parameters.xhtml#extended-dns-error-codes
    =>
    ExtendedErrorCode, u16;

    /// The error in question falls into a category that does not
    /// match known extended error codes. Implementations SHOULD
    /// include an EXTRA-TEXT value to augment this error code with
    /// additional information.
    (OTHER => 0, b"Other Error")

    /// The resolver attempted to perform DNSSEC validation, but a DNSKEY
    /// RRset contained only unsupported DNSSEC algorithms.
    (UNSUPPORTED_DNSKEY_ALGORITHM => 1, b"Unsupported DNSKEY Algorithm")

    /// The resolver attempted to perform DNSSEC validation, but a DS
    /// RRset contained only unsupported Digest Types.
    (UNSUPPORTED_DS_DIGEST_TYPE => 2, b"Unsupported DS Digest Type")

    /// The resolver was unable to resolve the answer within its time
    /// limits and decided to answer with previously cached data
    /// instead of answering with an error. This is typically caused
    /// by problems communicating with an authoritative server,
    /// possibly as result of a denial of service (DoS) attack against
    /// another network. (See also Code 19.)
    (STALE_ANSWER => 3, b"Stale Answer")

    /// For policy reasons (legal obligation or malware filtering, for
    /// instance), an answer was forged. Note that this should be
    /// used when an answer is still provided, not when failure
    /// codes are returned instead. See Blocked (15), Censored
    /// (16), and Filtered (17) for use when returning other
    /// response codes.
    (FORGED_ANSWER => 4, b"Forged Answer")

    /// The resolver attempted to perform DNSSEC validation, but
    /// validation ended in the Indeterminate state [RFC 4035].
    ///
    /// [RFC 4035]: https://tools.ietf.org/html/rfc4035
    (DNSSEC_INDETERMINATE => 5, b"DNSSEC Indeterminate")

    /// The resolver attempted to perform DNSSEC validation, but
    /// validation ended in the Bogus state.
    (DNSSEC_BOGUS => 6, b"DNSSEC Bogus")

    /// The resolver attempted to perform DNSSEC validation, but no
    /// signatures are presently valid and some (often all) are
    /// expired.
    (SIGNATURE_EXPIRED => 7, b"Signature Expired")

    /// The resolver attempted to perform DNSSEC validation, but no
    /// signatures are presently valid and at least some are not yet
    /// valid.
    (SIGNATURE_NOT_YET_VALID => 8, b"Signature Not Yet Valid")

    /// A DS record existed at a parent, but no supported matching
    /// DNSKEY record could be found for the child.
    (DNSKEY_MISSING => 9, b"DNSKEY Missing")

    /// The resolver attempted to perform DNSSEC validation, but no
    /// RRSIGs could be found for at least one RRset where RRSIGs were
    /// expected.
    (RRSIGS_MISSING => 10, b"RRSIGs Missing")

    /// The resolver attempted to perform DNSSEC validation, but no
    /// Zone Key Bit was set in a DNSKEY.
    (NO_ZONE_KEY_BIT_SET => 11, b"No Zone Key Bit Set")

    /// The resolver attempted to perform DNSSEC validation, but the
    /// requested data was missing and a covering NSEC or NSEC3 was
    /// not provided.
    (NSEC_MISSING => 12, b"NSEC Missing")

    /// The resolver is returning the SERVFAIL RCODE from its cache.
    (CACHED_ERROR => 13, b"Cached Error")

    /// The server is unable to answer the query, as it was not fully
    /// functional when the query was received.
    (NOT_READY => 14, b"Not Ready")

    /// The server is unable to respond to the request because the
    /// domain is on a blocklist due to an internal security policy
    /// imposed by the operator of the server resolving or forwarding
    /// the query.
    (BLOCKED => 15, b"Blocked")

    /// The server is unable to respond to the request because the
    /// domain is on a blocklist due to an external requirement
    /// imposed by an entity other than the operator of the server
    /// resolving or forwarding the query. Note that how the imposed
    /// policy is applied is irrelevant (in-band DNS filtering, court
    /// order, etc.).
    (CENSORED => 16, b"Censored")

    /// The server is unable to respond to the request because the
    /// domain is on a blocklist as requested by the client.
    /// Functionally, this amounts to "you requested that we filter
    /// domains like this one."
    (FILTERED => 17, b"Filtered")

    /// An authoritative server or recursive resolver that receives a
    /// query from an "unauthorized" client can annotate its REFUSED
    /// message with this code. Examples of "unauthorized" clients are
    /// recursive queries from IP addresses outside the network,
    /// blocklisted IP addresses, local policy, etc.
    (PROHIBITED => 18, b"Prohibited")

    /// The resolver was unable to resolve an answer within its
    /// configured time limits and decided to answer with a previously
    /// cached NXDOMAIN answer instead of answering with an error.
    /// This may be caused, for example, by problems communicating
    /// with an authoritative server, possibly as result of a denial
    /// of service (DoS) attack against another network. (See also
    /// Code 3.)
    (STALE_NXDOMAIN_ANSWER => 19, b"Stale NXDomain Answer")

    /// An authoritative server that receives a query with the
    /// Recursion Desired (RD) bit clear, or when it is not configured
    /// for recursion for a domain for which it is not authoritative,
    /// SHOULD include this EDE code in the REFUSED response. A
    /// resolver that receives a query with the RD bit clear SHOULD
    /// include this EDE code in the REFUSED response.
    (NOT_AUTHORITATIVE => 20, b"Not Authoritative")

    /// The requested operation or query is not supported.
    (NOT_SUPPORTED => 21, b"Not Supported")

    /// The resolver could not reach any of the authoritative name
    /// servers (or they potentially refused to reply).
    (NO_REACHABLE_AUTHORITY => 22, b"No Reachable Authority")

    /// An unrecoverable error occurred while communicating with
    /// another server.
    (NETWORK_ERROR => 23, b"Network Error")

    /// The authoritative server cannot answer with data for a zone it
    /// is otherwise configured to support. Examples of this include
    /// its most recent zone being too old or having expired.
    (INVALID_DATA => 24, b"Invalid Data")

    /// The requested resource record type should not appear in a query.
    (INVALID_QUERY_TYPE => 30, b"Invalid Query Type")
}

/// Start of the private range for EDE codes.
///
/// ```text
/// Registration Procedures:
///  o  0     - 49151: First come, first served.
///  o  49152 - 65535: Private use.
/// ```
pub const EDE_PRIVATE_RANGE_BEGIN: u16 = 49152;

int_enum_str_with_prefix!(
    ExtendedErrorCode,
    "EDE",
    b"EDE",
    u16,
    "unknown error code"
);