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Diffstat (limited to 'src/resolve/resolved-dns-cache.c')
-rw-r--r--src/resolve/resolved-dns-cache.c17
1 files changed, 10 insertions, 7 deletions
diff --git a/src/resolve/resolved-dns-cache.c b/src/resolve/resolved-dns-cache.c
index 1c7dd56b3b..301f383809 100644
--- a/src/resolve/resolved-dns-cache.c
+++ b/src/resolve/resolved-dns-cache.c
@@ -273,13 +273,13 @@ static DnsCacheItem* dns_cache_get(DnsCache *c, DnsResourceRecord *rr) {
return NULL;
}
-static usec_t calculate_until(DnsResourceRecord *rr, usec_t timestamp, bool use_soa_minimum) {
+static usec_t calculate_until(DnsResourceRecord *rr, uint32_t nsec_ttl, usec_t timestamp, bool use_soa_minimum) {
uint32_t ttl;
usec_t u;
assert(rr);
- ttl = rr->ttl;
+ ttl = MIN(rr->ttl, nsec_ttl);
if (rr->key->type == DNS_TYPE_SOA && use_soa_minimum) {
/* If this is a SOA RR, and it is requested, clamp to
* the SOA's minimum field. This is used when we do
@@ -339,7 +339,7 @@ static void dns_cache_item_update_positive(
dns_resource_key_unref(i->key);
i->key = dns_resource_key_ref(rr->key);
- i->until = calculate_until(rr, timestamp, false);
+ i->until = calculate_until(rr, (uint32_t) -1, timestamp, false);
i->authenticated = authenticated;
i->shared_owner = shared_owner;
@@ -420,7 +420,7 @@ static int dns_cache_put_positive(
i->type = DNS_CACHE_POSITIVE;
i->key = dns_resource_key_ref(rr->key);
i->rr = dns_resource_record_ref(rr);
- i->until = calculate_until(rr, timestamp, false);
+ i->until = calculate_until(rr, (uint32_t) -1, timestamp, false);
i->authenticated = authenticated;
i->shared_owner = shared_owner;
i->owner_family = owner_family;
@@ -448,6 +448,7 @@ static int dns_cache_put_negative(
DnsResourceKey *key,
int rcode,
bool authenticated,
+ uint32_t nsec_ttl,
usec_t timestamp,
DnsResourceRecord *soa,
int owner_family,
@@ -470,13 +471,13 @@ static int dns_cache_put_negative(
if (dns_type_is_pseudo(key->type))
return 0;
- if (soa->soa.minimum <= 0 || soa->ttl <= 0) {
+ if (nsec_ttl <= 0 || soa->soa.minimum <= 0 || soa->ttl <= 0) {
if (log_get_max_level() >= LOG_DEBUG) {
r = dns_resource_key_to_string(key, &key_str);
if (r < 0)
return r;
- log_debug("Not caching negative entry with zero SOA TTL: %s", key_str);
+ log_debug("Not caching negative entry with zero SOA/NSEC/NSEC3 TTL: %s", key_str);
}
return 0;
@@ -496,7 +497,7 @@ static int dns_cache_put_negative(
return -ENOMEM;
i->type = rcode == DNS_RCODE_SUCCESS ? DNS_CACHE_NODATA : DNS_CACHE_NXDOMAIN;
- i->until = calculate_until(soa, timestamp, true);
+ i->until = calculate_until(soa, nsec_ttl, timestamp, true);
i->authenticated = authenticated;
i->owner_family = owner_family;
i->owner_address = *owner_address;
@@ -571,6 +572,7 @@ int dns_cache_put(
int rcode,
DnsAnswer *answer,
bool authenticated,
+ uint32_t nsec_ttl,
usec_t timestamp,
int owner_family,
const union in_addr_union *owner_address) {
@@ -669,6 +671,7 @@ int dns_cache_put(
key,
rcode,
authenticated,
+ nsec_ttl,
timestamp,
soa,
owner_family, owner_address);