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

//! Record Data of Well-defined Record Types
//!
//! This module will eventually contain implementations for the record data
//! of all defined resource record types.
//!
//! The types are named identically to the
//! [`domain::base::iana::Rtype`][crate::base::iana::Rtype] variant they
//! implement. They are grouped into submodules for the RFCs they are defined
//! in. All types are also re-exported at the top level here. Ie., for the
//! AAAA record type, you can simply `use domain::rdata::Aaaa` instead of
//! `use domain::rdata::rfc3596::Aaaa` which nobody could possibly
//! remember. There are, however, some helper data types defined here and
//! there which are not re-exported to keep things somewhat tidy.
//!
//! See the [`domain::base::iana::Rtype`][crate::base::iana::Rtype] enum for
//! the complete set of record types and, consequently, those types that are
//! still missing.
//!
//! In addition, the module provides two enums combining the known types.
//! [`AllRecordData`] indeed contains all record data types known plus
//! [`UnknownRecordData`] for the rest, while [`ZoneRecordData`] only
//! contains those types that can appear in zone files plus, again,
//! [`UnknownRecordData`] for everything else.

// A note on implementing record types with embedded domain names with regards
// to compression and canonical representation:
//
// RFC 3597 stipulates that only record data of record types defined in RFC
// 1035 is allowed to be compressed. (These are called “well-known record
// types.”) For all other types, `CompressDname::append_compressed_name`
// must not be used and the names be composed with `ToDname::compose`.
//
// RFC 4034 defines the canonical form of record data. For this form, domain
// names included in the record data of the following record types must be
// composed canonically using `ToName::compose_canonical`: All record types
// from RFC 1035 plus RP, AFSDB, RT, SIG, PX, NXT, NAPTR, KX, SRV, DNAME, A6,
// RRSIG, NSEC. All other record types must be composed canonically using
// `ToName::compose`.
//
// The macros module contains three macros for generating name-only record
// types in these three categories: `name_type_well_known!` for types from
// RFC 1035, `name_type_canonical!` for non-RFC 1035 types that need to be
// lowercased, and `name_type!` for everything else.

#[macro_use]
mod macros;

// The rdata_types! macro (defined in self::macros) defines the modules
// containing the record data types, re-exports those here, and creates the
// ZoneRecordData and AllRecordData enums containing all record types that
// can appear in a zone file and all record types that exist.
//
// All record data types listed here MUST have the same name as the
// `Rtype` variant they implement – some of the code implemented by the macro
// relies on that.
//
// Add any new module here and then add all record types in that module that
// can appear in zone files under "zone" and all others under "pseudo".
// Your type can be generic over an octet type "O" and a domain name type "N".
// Add these as needed. Trait bounds on them differ for different methods, so
// check the bounds on ZoneRecordData and AllRecordData if there are errors.
rdata_types! {
    rfc1035::{
        zone {
            A,
            Cname<N>,
            Hinfo<O>,
            Mb<N>,
            Md<N>,
            Mf<N>,
            Mg<N>,
            Minfo<N>,
            Mr<N>,
            Mx<N>,
            Ns<N>,
            Ptr<N>,
            Soa<N>,
            Txt<O>,
        }
        pseudo {
            Null<O>
        }
    }
    aaaa::{
        zone {
            Aaaa,
        }
    }
    cds::{
        zone {
            Cdnskey<O>,
            Cds<O>,
        }
    }
    dname::{
        zone {
            Dname<N>,
        }
    }
    dnssec::{
        zone {
            Dnskey<O>,
            Rrsig<O, N>,
            Nsec<O, N>,
            Ds<O>,
        }
    }
    nsec3::{
        zone {
            Nsec3<O>,
            Nsec3param<O>,
        }
    }
    srv::{
        zone {
            Srv<N>,
        }
    }
    svcb::{
        pseudo {
            Svcb<O, N>,
            Https<O, N>,
        }
    }
    tsig::{
        pseudo {
            Tsig<O, N>,
        }
    }
    zonemd::{
        zone {
            Zonemd<O>,
        }
    }
}