diff --git a/lib/layer/pktcache.c b/lib/layer/pktcache.c
index 050aec156255e35320b7e1c11b12af6f0289cdd5..15891294a1c874a3e10611f8787bbb53cc8acfa1 100644
--- a/lib/layer/pktcache.c
+++ b/lib/layer/pktcache.c
@@ -54,10 +54,9 @@ static void adjust_ttl(knot_rrset_t *rr, uint32_t drift)
}
}
-static int loot_cache(namedb_txn_t *txn, knot_pkt_t *pkt, uint8_t tag, uint32_t timestamp)
+static int loot_cache_pkt(namedb_txn_t *txn, knot_pkt_t *pkt, const knot_dname_t *qname,
+ uint16_t rrtype, uint8_t tag, uint32_t timestamp)
{
- const knot_dname_t *qname = knot_pkt_qname(pkt);
- uint16_t rrtype = knot_pkt_qtype(pkt);
struct kr_cache_entry *entry;
entry = kr_cache_peek(txn, tag, qname, rrtype, ×tamp);
if (!entry) { /* Not in the cache */
@@ -91,6 +90,25 @@ static int loot_cache(namedb_txn_t *txn, knot_pkt_t *pkt, uint8_t tag, uint32_t
return ret;
}
+/** @internal Try to find a shortcut directly to searched packet, otherwise try to find minimised QNAME. */
+static int loot_cache(namedb_txn_t *txn, knot_pkt_t *pkt, uint8_t tag, struct kr_query *qry)
+{
+ uint32_t timestamp = qry->timestamp.tv_sec;
+ const knot_dname_t *qname = qry->sname;
+ uint16_t rrtype = qry->stype;
+ int ret = loot_cache_pkt(txn, pkt, qname, rrtype, tag, timestamp);
+ if (ret == 0) { /* Signalize minimisation disabled */
+ qry->flags |= QUERY_NO_MINIMIZE;
+ } else { /* Retry with minimised name */
+ qname = knot_pkt_qname(pkt);
+ rrtype = knot_pkt_qtype(pkt);
+ if (!knot_dname_is_equal(qname, qry->sname)) {
+ ret = loot_cache_pkt(txn, pkt, qname, rrtype, tag, timestamp);
+ }
+ }
+ return ret;
+}
+
static int peek(knot_layer_t *ctx, knot_pkt_t *pkt)
{
struct kr_request *req = ctx->data;
@@ -103,24 +121,25 @@ static int peek(knot_layer_t *ctx, knot_pkt_t *pkt)
return ctx->state; /* Only IN class */
}
- /* Fetch packet from cache */
+ /* Prepare read transaction */
namedb_txn_t txn;
struct kr_cache *cache = req->ctx->cache;
if (kr_cache_txn_begin(cache, &txn, NAMEDB_RDONLY) != 0) {
return ctx->state;
}
- uint32_t timestamp = qry->timestamp.tv_sec;
- if (loot_cache(&txn, pkt, get_tag(req->answer), timestamp) != 0) {
- kr_cache_txn_abort(&txn);
- return ctx->state;
- }
- /* Mark as solved from cache */
- DEBUG_MSG("=> satisfied from cache\n");
- qry->flags |= QUERY_CACHED;
- knot_wire_set_qr(pkt->wire);
+ /* Fetch either answer to original or minimized query */
+ uint8_t tag = get_tag(req->answer);
+ int ret = loot_cache(&txn, pkt, tag, qry);
kr_cache_txn_abort(&txn);
- return KNOT_STATE_DONE;
+ if (ret == 0) {
+ DEBUG_MSG("=> satisfied from cache\n");
+ qry->flags |= QUERY_CACHED;
+ pkt->parsed = pkt->size;
+ knot_wire_set_qr(pkt->wire);
+ return KNOT_STATE_DONE;
+ }
+ return ctx->state;
}
static uint32_t packet_ttl(knot_pkt_t *pkt)
diff --git a/lib/layer/rrcache.c b/lib/layer/rrcache.c
index 2b23742ae290efffd81af18a5dbf05e3b5fb40ee..10cec2759db18688ba59e3dc230e16210173b033 100644
--- a/lib/layer/rrcache.c
+++ b/lib/layer/rrcache.c
@@ -33,18 +33,28 @@ static int begin(knot_layer_t *ctx, void *module_param)
}
static int loot_rr(namedb_txn_t *txn, knot_pkt_t *pkt, const knot_dname_t *name,
- uint16_t rrtype, uint16_t rrclass, uint32_t timestamp)
+ uint16_t rrclass, uint16_t rrtype, struct kr_query *qry)
{
+ /* Check if record exists in cache */
+ uint32_t timestamp = qry->timestamp.tv_sec;
knot_rrset_t cache_rr;
knot_rrset_init(&cache_rr, (knot_dname_t *)name, rrtype, rrclass);
int ret = kr_cache_peek_rr(txn, &cache_rr, ×tamp);
if (ret != 0) {
return ret;
}
- knot_rrset_t rr_copy = kr_cache_materialize(&cache_rr, timestamp, &pkt->mm);
- if (rr_copy.rrs.rr_count == 0) {
- return kr_error(ENOENT);
+
+ /* Update packet question */
+ if (!knot_dname_is_equal(knot_pkt_qname(pkt), name)) {
+ uint8_t header[KNOT_WIRE_HEADER_SIZE];
+ memcpy(header, pkt->wire, sizeof(header));
+ knot_pkt_clear(pkt);
+ memcpy(pkt->wire, header, sizeof(header));
+ knot_pkt_put_question(pkt, qry->sname, qry->sclass, qry->stype);
}
+
+ /* Update packet answer */
+ knot_rrset_t rr_copy = kr_cache_materialize(&cache_rr, timestamp, &pkt->mm);
ret = knot_pkt_put(pkt, KNOT_COMPR_HINT_NONE, &rr_copy, KNOT_PF_FREE);
if (ret != 0) {
knot_rrset_clear(&rr_copy, &pkt->mm);
@@ -53,14 +63,31 @@ static int loot_rr(namedb_txn_t *txn, knot_pkt_t *pkt, const knot_dname_t *name,
return kr_ok();
}
-static int loot_cache(namedb_txn_t *txn, knot_pkt_t *pkt, uint32_t timestamp)
+static int loot_cache_set(namedb_txn_t *txn, knot_pkt_t *pkt, const knot_dname_t *qname,
+ uint16_t rrclass, uint16_t rrtype, struct kr_query *qry)
{
- const knot_dname_t *qname = knot_pkt_qname(pkt);
- uint16_t rrclass = knot_pkt_qclass(pkt);
- uint16_t rrtype = knot_pkt_qtype(pkt);
- int ret = loot_rr(txn, pkt, qname, rrtype, rrclass, timestamp);
+ int ret = loot_rr(txn, pkt, qname, rrclass, rrtype, qry);
if (ret == kr_error(ENOENT) && rrtype != KNOT_RRTYPE_CNAME) { /* Chase CNAME if no direct hit */
- ret = loot_rr(txn, pkt, qname, KNOT_RRTYPE_CNAME, rrclass, timestamp);
+ ret = loot_rr(txn, pkt, qname, rrclass, KNOT_RRTYPE_CNAME, qry);
+ }
+ return ret;
+}
+
+/** @internal Try to find a shortcut directly to searched record, otherwise try to find minimised QNAME. */
+static int loot_cache(namedb_txn_t *txn, knot_pkt_t *pkt, struct kr_query *qry)
+{
+ const knot_dname_t *qname = qry->sname;
+ uint16_t rrclass = qry->sclass;
+ uint16_t rrtype = qry->stype;
+ int ret = loot_cache_set(txn, pkt, qname, rrclass, rrtype, qry);
+ if (ret == 0) { /* Signalize minimisation disabled */
+ qry->flags |= QUERY_NO_MINIMIZE;
+ } else { /* Retry with minimised name */
+ qname = knot_pkt_qname(pkt);
+ rrtype = knot_pkt_qtype(pkt);
+ if (!knot_dname_is_equal(qname, qry->sname)) {
+ ret = loot_cache_set(txn, pkt, qname, rrclass, rrtype, qry);
+ }
}
return ret;
}
@@ -77,15 +104,14 @@ static int peek(knot_layer_t *ctx, knot_pkt_t *pkt)
namedb_txn_t txn;
struct kr_cache *cache = req->ctx->cache;
if (kr_cache_txn_begin(cache, &txn, NAMEDB_RDONLY) != 0) {
- return KNOT_STATE_CONSUME;
+ return ctx->state;
}
/* Reconstruct the answer from the cache,
* it may either be a CNAME chain or direct answer.
* Only one step of the chain is resolved at a time.
*/
- uint32_t timestamp = qry->timestamp.tv_sec;
- int ret = loot_cache(&txn, pkt, timestamp);
+ int ret = loot_cache(&txn, pkt, qry);
kr_cache_txn_abort(&txn);
if (ret == 0) {
DEBUG_MSG("=> satisfied from cache\n");