remove dead code and change retry count for client

.gitignore

@@ -23,3 +23,5 @@ session.json
 
 # Environment files
 .env
+
+todo

cmd/server/main.go

@@ -21,7 +21,7 @@ import (
 
 func main() {
 	dataDir := flag.String("data-dir", "./data", "Data directory for channels, session, and config")
-	listen := flag.String("listen", ":5300", "DNS listen address (host:port)")
+	listen := flag.String("listen", ":53", "DNS listen address (host:port)")
 	domain := flag.String("domain", "", "DNS domain (e.g., t.example.com)")
 	key := flag.String("key", "", "Encryption passphrase")
 	channelsFile := flag.String("channels", "", "Path to channels file (default: {data-dir}/channels.txt)")

internal/client/fetcher.go

@@ -245,7 +245,7 @@ func (f *Fetcher) rateWait(ctx context.Context) error {
 // It enqueues through the rate limiter and respects ctx cancellation.
 // On transient failure it retries up to 2 additional times with a short back-off.
 func (f *Fetcher) FetchBlock(ctx context.Context, channel, block uint16) ([]byte, error) {
-	const maxAttempts = 6
+	const maxAttempts = 10
 	var lastErr error
 	for attempt := 0; attempt < maxAttempts; attempt++ {
 		if attempt > 0 {

internal/protocol/dns.go

@@ -81,25 +81,6 @@ func EncodeQuery(queryKey [KeySize]byte, channel, block uint16, domain string, m
 	}
 }
 
-func splitLabel(s string, size int) []string {
-	if size <= 0 {
-		size = maxDNSLabelLen
-	}
-	if size > maxDNSLabelLen {
-		size = maxDNSLabelLen
-	}
-
-	parts := make([]string, 0, (len(s)+size-1)/size)
-	for len(s) > size {
-		parts = append(parts, s[:size])
-		s = s[size:]
-	}
-	if len(s) > 0 {
-		parts = append(parts, s)
-	}
-	return parts
-}
-
 // splitMultiLabel splits a hex string into two labels of randomised, unequal length.
 // The first label is between 12 and (len-4) chars so the second is at least 4 chars.
 // This makes query labels look less uniform across requests.