diff options
Diffstat (limited to 'src/resolve/resolved-dns-packet.c')
| -rw-r--r-- | src/resolve/resolved-dns-packet.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/src/resolve/resolved-dns-packet.c b/src/resolve/resolved-dns-packet.c index c34ecc44f8..c8dd5fdeee 100644 --- a/src/resolve/resolved-dns-packet.c +++ b/src/resolve/resolved-dns-packet.c @@ -2018,7 +2018,17 @@ int dns_packet_extract(DnsPacket *p) { p->opt = dns_resource_record_ref(rr); } else { - r = dns_answer_add(answer, rr, p->ifindex); + + /* According to RFC 4795, section + * 2.9. only the RRs from the Answer + * section shall be cached. Hence mark + * only those RRs as cacheable by + * default, but not the ones from the + * Additional or Authority + * sections. */ + + r = dns_answer_add(answer, rr, p->ifindex, + i < DNS_PACKET_ANCOUNT(p) ? DNS_ANSWER_CACHEABLE : 0); if (r < 0) goto finish; } |