[1577] Logging for findNSEC3

src/lib/datasrc/database.cc

@@ -941,7 +941,9 @@ DatabaseClient::Finder::findInternal(const Name& name, const RRType& type,
 
 ZoneFinder::FindNSEC3Result
 DatabaseClient::Finder::findNSEC3(const Name& name, bool recursive) {
-    // TODO: Some logging.
+    LOG_DEBUG(logger, DBG_TRACE_BASIC, DATASRC_DATABASE_FINDNSEC3).arg(name).
+        arg(recursive ? "recursive" : "non-recursive");
+
 
     // First, validate the input
     const NameComparisonResult cmp_result(name.compare(getOrigin()));
@@ -980,6 +982,8 @@ DatabaseClient::Finder::findNSEC3(const Name& name, bool recursive) {
         const string hash(calculator->calculate(labels == qlabels ? name :
                                                 name.split(qlabels - labels,
                                                            labels)));
+        LOG_DEBUG(logger, DBG_TRACE_BASIC, DATASRC_DATABASE_FINDNSEC3_TRYHASH).
+            arg(name).arg(labels).arg(hash);
 
         DatabaseAccessor::IteratorContextPtr
             context(accessor_->getNSEC3Records(hash, zone_id_));
@@ -999,10 +1003,16 @@ DatabaseClient::Finder::findNSEC3(const Name& name, bool recursive) {
                           "exists, but no NSEC3 there");
             }
 
+            LOG_DEBUG(logger, DBG_TRACE_BASIC,
+                      DATASRC_DATABASE_FINDNSEC3_MATCH).arg(name).arg(labels).
+                arg(*it->second);
             return (FindNSEC3Result(true, labels, it->second, covering_proof));
         } else {
             const string prevHash(accessor_->findPreviousNSEC3Hash(zone_id_,
                                                                    hash));
+            LOG_DEBUG(logger, DBG_TRACE_BASIC,
+                      DATASRC_DATABASE_FINDNSEC3_TRYHASH_PREV).arg(name).
+                arg(labels).arg(prevHash);
             context = accessor_->getNSEC3Records(prevHash, zone_id_);
             const FoundRRsets prev_nsec3(getRRsets(prevHash + "." + otext,
                                                    NSEC3_TYPES(), false, NULL,
@@ -1021,6 +1031,9 @@ DatabaseClient::Finder::findNSEC3(const Name& name, bool recursive) {
 
             covering_proof = prev_it->second;
             if (!recursive) {
+                LOG_DEBUG(logger, DBG_TRACE_BASIC,
+                          DATASRC_DATABASE_FINDNSEC3_COVER).arg(name).
+                    arg(labels).arg(*covering_proof);
                 return (FindNSEC3Result(false, labels, covering_proof,
                                         ConstRRsetPtr()));
             }

src/lib/datasrc/datasrc_messages.mes

@@ -75,6 +75,35 @@ The datasource tried to provide an NSEC proof that the named domain does not
 exist, but the database backend doesn't support DNSSEC. No proof is included
 in the answer as a result.
 
+% DATASRC_DATABASE_FINDNSEC3 Looking for NSEC3 for %1 in % mode
+Debug information. A search in an database data source for NSEC3 that
+matches or covers the given name is being started.
+
+% DATASRC_DATABASE_FINDNSEC3_COVER found a covering NSEC3 for %1: %2
+Debug information. An NSEC3 that covers the given name is found and
+being returned.  The found NSEC3 RRset is also displayed.
+
+% DATASRC_DATABASE_FINDNSEC3_MATCH found a matching NSEC3 for %1 at label count %2: %3
+Debug information. An NSEC3 that matches (a possibly superdomain of)
+the given name is found and being returned.  When the shown label
+count is smaller than that of the given name, the matching NSEC3 is
+for a superdomain of the given name (see DATASRC_DATABSE_FINDNSEC3_TRYHASH).
+The found NSEC3 RRset is also displayed.
+
+% DATASRC_DATABASE_FINDNSEC3_TRYHASH looking for NSEC3 for %1 at label count %2 (hash %3)
+Debug information. In an attempt of finding an NSEC3 for the give name,
+(a possibly superdomain of) the name is hashed and searched for in the
+NSEC3 name space.  When the shown label count is smaller than that of the
+shown name, the search tries the superdomain name that share the shown
+(higher) label count of the shown name (e.g., for
+www.example.com. with shown label count of 3, example.com. is being
+tried).
+
+% DATASRC_DATABASE_FINDNSEC3_TRYHASH_PREV looking for previous NSEC3 for %1 at label count %2 (hash %3)
+Debug information. An exact match on hash (see
+DATASRC_DATABASE_FINDNSEC3_TRYHASH) was unsuccessful. We get the previous hash
+to that one instead.
+
 % DATASRC_DATABASE_FIND_RECORDS looking in datasource %1 for record %2/%3/%4
 Debug information. The database data source is looking up records with the given
 name and type in the database.