dnsx/cacher: m debug log

Author: ignoramous

intra/dns53/dot.go

@@ -9,11 +9,13 @@ package dns53
 import (
 	"context"
 	"crypto/tls"
+	"errors"
 	"fmt"
 	"net"
 	"net/netip"
 	"net/url"
 	"strconv"
+	"sync/atomic"
 	"time"
 
 	x "github.com/celzero/firestack/intra/backend"

intra/dnsx/alg.go

@@ -1862,7 +1862,7 @@ func Req(t Transport, network string, q *dns.Msg, smm *x.DNSSummary) (*dns.Msg,
 		return r, nil
 	}
 
-	log.V("alg: Req: %s:%d servfail; by: %s, rdata: %d, status: %s, rcode %d",
+	log.V("alg: Req: %s:%d servfail; by: %s, rdata: %d, status: %d, rcode %d",
 		qname, qtyp, smm.ID, smm.RData, smm.Status, xdns.Rcode(r))
 	return r, err
 }

intra/dnsx/cacher.go

@@ -392,6 +392,11 @@ func (t *ctransport) fetch(network string, q *dns.Msg, smmout *x.DNSSummary, cb
 			return ccx, qerr
 		})
 
+		if cc == nil {
+			log.E("cache: barrier: %s; nil return for %s; err? %v", t.ID(), key, err)
+			ccx = cc
+		}
+
 		cachedres, fresh := cb.freshCopy(key) // always prefer value from cache
 		cachehit := cachedres != nil
 		// nil ans when Transport returns err (no servfail) and cache is empty