From 7ec9cd4919fe48da48dcca53acd5a758c6ab4c0f Mon Sep 17 00:00:00 2001
From: jbergner <jbergner@send.nrw>
Date: Fri, 9 May 2025 10:06:40 +0200
Subject: [PATCH] =?UTF-8?q?DHCP=20Unterst=C3=BCtzung=20implementiert?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 main.go | 24 +++++++++++++++++++-----
 1 file changed, 19 insertions(+), 5 deletions(-)
diff --git a/main.go b/main.go
index 7ade392..68752f0 100644
--- a/main.go
+++ b/main.go
@@ -47,6 +47,8 @@ var (
 	rangeLimit     int
 	singleTemplate *template.Template
 	rangeTemplate  *template.Template
+	dhcpServer     string
+	dhcpScope      string
 )
 
 // ---------------------------------------------------------------------------
@@ -57,7 +59,7 @@ type singleData struct {
 	HaveResult                             bool
 }
 
-type addrPair struct{ IPv4, IPv6 string }
+type addrPair struct{ Name, IPv4, IPv6 string }
 
 type rangeData struct {
 	Start, End string
@@ -129,6 +131,16 @@ func handleRange(w http.ResponseWriter, r *http.Request) {
 			d.HaveResult = true
 			d.Rows = rows
 		}
+		for a, b := range rows {
+			fmt.Println(a, b)
+			octets := strings.Split(b.IPv4, ".")
+			if len(octets) != 4 {
+				fmt.Println("Ungültige IP-Adresse!")
+				return
+			}
+			N := "PC" + octets[2] + octets[3]
+			d.Rows = append(d.Rows, addrPair{IPv4: b.IPv4, IPv6: b.IPv6, Name: N})
+		}
 		renderRange(w, d)
 	default:
 		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
@@ -214,6 +226,9 @@ func initConfigAndTemplates() {
 		pageIP = defaultIP
 	}
 
+	dhcpScope = os.Getenv("DHCP_SERVER")
+	dhcpServer = os.Getenv("DHCP_SCOPE")
+
 	// Range limit ---------------------------------
 	if limStr := os.Getenv("RANGE_LIMIT"); limStr != "" {
 		if v, err := strconv.Atoi(limStr); err == nil && v > 0 {
@@ -227,7 +242,7 @@ func initConfigAndTemplates() {
 
 	// Templates -----------------------------------
 	singleHTML := fmt.Sprintf(singlePageHTML, pageIP, ulaPrefix)
-	rangeHTML := fmt.Sprintf(rangePageHTML, ulaPrefix)
+	rangeHTML := fmt.Sprintf(rangePageHTML, dhcpServer, dhcpScope)
 	singleTemplate = template.Must(template.New("single").Parse(singleHTML))
 	rangeTemplate = template.Must(template.New("range").Parse(rangeHTML))
 }
@@ -307,10 +322,9 @@ var rangePageHTML = `<!DOCTYPE html>
 </form>
 {{if .HaveResult}}
 <table>
- <tr><th>IPv4</th><th>IPv6</th></tr>
- {{range .Rows}}<tr><td>{{.IPv4}}</td><td>{{.IPv6}}</td></tr>{{end}}
+ <tr><th>IPv4</th><th>IPv6</th><th>DHCP-IPv4</th><th>DHCP-IPv6</th></tr>
+ {{range .Rows}}<tr><td>{{.IPv4}}</td><td>{{.IPv6}}</td><td>netsh DHCP Server %s Scope %s Add reservedip {{.IPv4}} "{{.Name}}.stadt-hilden.de" "" "DHCP"</td><td>---</td></tr>{{end}}
 </table>
 {{end}}
 {{if .Error}}<p style="color:#b00">Fehler: {{.Error}}</p>{{end}}
-<p style="margin-top:1rem">Aktives Präfix: <code>%s</code> (/96)</p>
 </body></html>`

IPv4	IPv6
{{.IPv4}}	{{.IPv6}}
IPv4	IPv6	DHCP-IPv4	DHCP-IPv6
{{.IPv4}}	{{.IPv6}}	netsh DHCP Server %s Scope %s Add reservedip {{.IPv4}} "{{.Name}}.stadt-hilden.de" "" "DHCP"	---