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| author | Lennart Poettering <lennart@poettering.net> | 2015-11-27 00:41:32 +0100 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2015-11-27 00:46:51 +0100 |
| commit | d830ebbdf67d8cb32d33d8fdd47cf467fd6d3815 (patch) | |
| tree | 97152e692c31f5c578354736a3e0c8d514d25a81 /src/resolve/resolved-dns-packet.h | |
| parent | 452b4e327d23b9e468d3198f4c91e8efd0b52a71 (diff) | |
resolved: never cache RRs originating from localhost
After all, this is likely a local DNS forwarder that caches anyway,
hence there's no point in caching twice.
Fixes #2038.
Diffstat (limited to 'src/resolve/resolved-dns-packet.h')
| -rw-r--r-- | src/resolve/resolved-dns-packet.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/resolve/resolved-dns-packet.h b/src/resolve/resolved-dns-packet.h index 48df5dfc53..90b5a7c8bd 100644 --- a/src/resolve/resolved-dns-packet.h +++ b/src/resolve/resolved-dns-packet.h @@ -177,6 +177,14 @@ void dns_packet_rewind(DnsPacket *p, size_t idx); int dns_packet_skip_question(DnsPacket *p); int dns_packet_extract(DnsPacket *p); +static inline bool DNS_PACKET_SHALL_CACHE(DnsPacket *p) { + /* Never cache data originating from localhost, under the + * assumption, that it's coming from a locally DNS forwarder + * or server, that is caching on its own. */ + + return in_addr_is_localhost(p->family, &p->sender) == 0; +} + enum { DNS_RCODE_SUCCESS = 0, DNS_RCODE_FORMERR = 1, |