]>
Commit | Line | Data |
---|---|---|
7263f724 ZJS |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2014 Zbigniew Jędrzejewski-Szmek | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include "dns-type.h" | |
23 | ||
24 | typedef const struct { | |
25 | uint16_t type; | |
26 | const char *name; | |
27 | } dns_type; | |
28 | ||
29 | static const struct dns_type_name * | |
30 | lookup_dns_type (register const char *str, register unsigned int len); | |
31 | ||
32 | #include "dns_type-from-name.h" | |
33 | #include "dns_type-to-name.h" | |
34 | ||
de292aa1 | 35 | int dns_type_from_string(const char *s) { |
7263f724 ZJS |
36 | const struct dns_type_name *sc; |
37 | ||
38 | assert(s); | |
7263f724 ZJS |
39 | |
40 | sc = lookup_dns_type(s, strlen(s)); | |
41 | if (!sc) | |
de292aa1 | 42 | return _DNS_TYPE_INVALID; |
7263f724 | 43 | |
de292aa1 | 44 | return sc->id; |
7263f724 | 45 | } |
8e6edc49 | 46 | |
bea4c76f LP |
47 | bool dns_type_is_pseudo(uint16_t type) { |
48 | ||
49 | /* Checks whether the specified type is a "pseudo-type". What | |
50 | * a "pseudo-type" precisely is, is defined only very weakly, | |
51 | * but apparently entails all RR types that are not actually | |
52 | * stored as RRs on the server and should hence also not be | |
53 | * cached. We use this list primarily to validate NSEC type | |
c33be4a6 | 54 | * bitfields, and to verify what to cache. */ |
bea4c76f LP |
55 | |
56 | return IN_SET(type, | |
57 | 0, /* A Pseudo RR type, according to RFC 2931 */ | |
58 | DNS_TYPE_ANY, | |
59 | DNS_TYPE_AXFR, | |
60 | DNS_TYPE_IXFR, | |
61 | DNS_TYPE_OPT, | |
62 | DNS_TYPE_TSIG, | |
63 | DNS_TYPE_TKEY | |
64 | ); | |
8e6edc49 | 65 | } |
c463eb78 LP |
66 | |
67 | bool dns_type_is_valid_query(uint16_t type) { | |
68 | ||
69 | /* The types valid as questions in packets */ | |
70 | ||
71 | return !IN_SET(type, | |
72 | 0, | |
73 | DNS_TYPE_OPT, | |
74 | DNS_TYPE_TSIG, | |
75 | DNS_TYPE_TKEY); | |
76 | } | |
77 | ||
78 | bool dns_type_is_valid_rr(uint16_t type) { | |
79 | ||
80 | /* The types valid as RR in packets (but not necessarily | |
81 | * stored on servers). */ | |
82 | ||
83 | return !IN_SET(type, | |
84 | DNS_TYPE_ANY, | |
85 | DNS_TYPE_AXFR, | |
86 | DNS_TYPE_IXFR); | |
87 | } |