From 990565b5564ca84317bf88b2a50fbbf2c3a46c50 Mon Sep 17 00:00:00 2001
From: jbergner <jbergner@send.nrw>
Date: Sun, 2 Nov 2025 16:43:29 +0100
Subject: [PATCH] Added Logging

---
 main.go | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/main.go b/main.go
index 32f1121..3442dd3 100644
--- a/main.go
+++ b/main.go
@@ -218,7 +218,7 @@ func DhcpHelperFunc(xHostname string, xDUIDs []string, xIAIDs []uint32) []payloa
 
 	rHostname := []rune(xHostname)
 	if len(rHostname) < 6 { // 2+4
-		// fallback: nimm letzte zwei Oktette 0.0
+		fmt.Println("DhcpHelperFunc::1")
 		qCalculatedIPv4 := Ipv4Octets[0] + "." + Ipv4Octets[1] + ".0.0"
 		qCalculatedIPv6, _ := embedIPv4(qCalculatedIPv4)
 		return []payloadHelper{{
@@ -233,6 +233,7 @@ func DhcpHelperFunc(xHostname string, xDUIDs []string, xIAIDs []uint32) []payloa
 			IAID:           "0",
 		}}
 	}
+	fmt.Println("DhcpHelperFunc::2")
 
 	qDUID := firstOrEmpty(xDUIDs)
 	qSegment1 := string(rHostname[2:4])
@@ -275,6 +276,7 @@ func getDhcp() []payloadHelper {
 	for _, b := range cp {
 		result = append(result, DhcpHelperFunc(b.Hostname, b.DUIDs, b.IAIDs)...)
 	}
+	fmt.Println("getDhcp:Result::", result)
 	return result
 }
 
@@ -285,10 +287,12 @@ func register(w http.ResponseWriter, r *http.Request) {
 	}
 	var p payload
 	if err := json.NewDecoder(r.Body).Decode(&p); err != nil {
+		fmt.Println("register:NewDecoder::ungültiges JSON")
 		http.Error(w, "ungültiges JSON", http.StatusBadRequest)
 		return
 	}
 	if p.Hostname == "" {
+		fmt.Println("register:Hostname::hostname fehlt")
 		http.Error(w, "hostname fehlt", http.StatusBadRequest)
 		return
 	}
@@ -447,6 +451,7 @@ func convertRange(start, end string) ([]addrPair, error) {
 func embedIPv4(ipv4 string) (string, error) {
 	ip := net.ParseIP(ipv4).To4()
 	if ip == nil {
+		fmt.Printf("%s ist keine gültige IPv4-Adresse", ipv4)
 		return "", fmt.Errorf("%s ist keine gültige IPv4-Adresse", ipv4)
 	}
 	hi := uint16(ip[0])<<8 | uint16(ip[1])