projects / thirdparty / systemd.git / blame
| 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 | } |