diff options
Diffstat (limited to 'src/resolve/resolved-dns-cache.c')
| -rw-r--r-- | src/resolve/resolved-dns-cache.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/resolve/resolved-dns-cache.c b/src/resolve/resolved-dns-cache.c index 4aacc268e2..008277ab09 100644 --- a/src/resolve/resolved-dns-cache.c +++ b/src/resolve/resolved-dns-cache.c @@ -479,6 +479,15 @@ int dns_cache_put( if (r > 0) return 0; + /* But not if it has a matching CNAME/DNAME (the negative + * caching will be done on the canonical name, not on the + * alias) */ + r = dns_answer_find_cname_or_dname(answer, key, NULL); + if (r < 0) + goto fail; + if (r > 0) + return 0; + /* See https://tools.ietf.org/html/rfc2308, which say that a * matching SOA record in the packet is used to to enable * negative caching. */ |