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| author | Lennart Poettering <lennart@poettering.net> | 2016-01-11 20:05:29 +0100 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2016-01-11 20:05:29 +0100 |
| commit | d0129ddb9fbb07bed7c8ea51b8031f824bf506fb (patch) | |
| tree | 9467e4acba84631984450893495e50a9bde15720 /src/resolve/dns-type.c | |
| parent | 274b874830b93e6592f190608866133384066a35 (diff) | |
resolved: refuse doing queries for known-obsolete RR types
Given how fragile DNS servers are with some DNS types, and given that we really should avoid confusing them with
known-weird lookups, refuse doing lookups for known-obsolete RR types.
Diffstat (limited to 'src/resolve/dns-type.c')
| -rw-r--r-- | src/resolve/dns-type.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/resolve/dns-type.c b/src/resolve/dns-type.c index 646d98cd46..2522374c33 100644 --- a/src/resolve/dns-type.c +++ b/src/resolve/dns-type.c @@ -124,6 +124,33 @@ bool dns_type_is_dnssec(uint16_t type) { DNS_TYPE_NSEC3PARAM); } +bool dns_type_is_obsolete(uint16_t type) { + return IN_SET(type, + /* Obsoleted by RFC 973 */ + DNS_TYPE_MD, + DNS_TYPE_MF, + DNS_TYPE_MAILA, + + /* Kinda obsoleted by RFC 2505 */ + DNS_TYPE_MB, + DNS_TYPE_MG, + DNS_TYPE_MR, + DNS_TYPE_MINFO, + DNS_TYPE_MAILB, + + /* RFC1127 kinda obsoleted this by recommending against its use */ + DNS_TYPE_WKS, + + /* Declared historical by RFC 6563 */ + DNS_TYPE_A6, + + /* Obsoleted by DNSSEC-bis */ + DNS_TYPE_NXT, + + /* RFC 1035 removed support for concepts that needed this from RFC 883 */ + DNS_TYPE_NULL); +} + const char *dns_class_to_string(uint16_t class) { switch (class) { |