Anpassungen für DHCPv6

main.go

@@ -20,12 +20,14 @@
 package main
 
 import (
+	"encoding/json"
 	"fmt"
 	"html/template"
 	"log"
 	"net"
 	"net/http"
 	"os"
+	"sort"
 	"strconv"
 	"strings"
 )
@@ -47,6 +49,7 @@ var (
 	rangeLimit     int
 	singleTemplate *template.Template
 	rangeTemplate  *template.Template
+	dhcpTemplate   *template.Template
 	dhcpServer     string
 	dhcpScope      string
 	dhcpNamePrefix string
@@ -71,6 +74,105 @@ type rangeData struct {
 	HaveResult                        bool
 }
 
+var DuidHostnameList []payload
+
+type payload struct {
+	Hostname string   `json:"hostname"`
+	DUIDs    []string `json:"duids"`
+	IAIDs    []uint32 `json:"iaids"`
+}
+
+type payloadHelper struct {
+	Hostname       string
+	DomainName     string
+	DhcpServer     string
+	DUID           string
+	IAID           string
+	CalculatedIPv4 string
+	Dhcp4Scope     string
+	CalculatedIPv6 string
+	Dhcp6Scope     string
+}
+
+func octetsRaw(ip string) ([]string, error) {
+	parts := strings.Split(ip, ".")
+	if len(parts) != 4 {
+		return nil, fmt.Errorf("ungültige IPv4-Adresse: %q", ip)
+	}
+	return parts, nil
+}
+
+func DhcpHelperFunc(xHostname string, xDUIDs []string, xIAIDs []uint32) []payloadHelper {
+	/*IPv4*/
+	Ipv4Octets, _ := octetsRaw(defaultIP)
+
+	rHostname := []rune(xHostname)
+	qDUID := xDUIDs[0]
+	qSegment1 := string(rHostname[2:4])
+	qSegment2 := string(rHostname[4:])
+
+	qCalculatedIPv4 := Ipv4Octets[0] + "." + Ipv4Octets[1] + "." + qSegment1 + "." + qSegment2
+	qCalculatedIPv6, _ := embedIPv4(qCalculatedIPv4)
+	var res []payloadHelper
+	for _, t := range xIAIDs {
+		r := payloadHelper{
+			Hostname:       xHostname,
+			DUID:           qDUID,
+			CalculatedIPv4: qCalculatedIPv4,
+			CalculatedIPv6: qCalculatedIPv6,
+			Dhcp4Scope:     dhcpScope,
+			Dhcp6Scope:     ulaPrefix,
+			DomainName:     dhcpDomain,
+			DhcpServer:     dhcpServer,
+			IAID:           fmt.Sprintf("%d", t),
+		}
+		res = append(res, r)
+	}
+
+	return res
+}
+
+func getDhcp() []payloadHelper {
+	var result []payloadHelper
+	sortByHostname(DuidHostnameList)
+	for _, b := range DuidHostnameList {
+		result = append(result, DhcpHelperFunc(b.Hostname, b.DUIDs, b.IAIDs)...)
+	}
+	return result
+}
+
+func register(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		http.Error(w, "nur POST erlaubt", http.StatusMethodNotAllowed)
+		return
+	}
+	var p payload
+	if err := json.NewDecoder(r.Body).Decode(&p); err != nil {
+		http.Error(w, "ungültiges JSON", http.StatusBadRequest)
+		return
+	}
+
+	// --- hier kannst du speichern, weiterverarbeiten, loggen … ---
+	log.Printf("neuer Client: %s → DUIDs=%v", p.Hostname, p.DUIDs)
+	DuidHostnameList = append(DuidHostnameList, p)
+
+	w.WriteHeader(http.StatusNoContent) // 204
+}
+
+func getdhcp6(w http.ResponseWriter, r *http.Request) {
+	temp := getDhcp()
+
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	_ = dhcpTemplate.Execute(w, temp)
+}
+
+func sortByHostname(p []payload) {
+	sort.Slice(p, func(i, j int) bool {
+		// Optional: case-insensitiv vergleichen
+		return strings.ToLower(p[i].Hostname) < strings.ToLower(p[j].Hostname)
+	})
+}
+
 // ---------------------------------------------------------------------------
 // main – HTTP routing
 // ---------------------------------------------------------------------------
@@ -80,6 +182,8 @@ func main() {
 	http.HandleFunc("/", handleSingle)
 	http.HandleFunc("/convert", handleSingleConvert)
 	http.HandleFunc("/range", handleRange)
+	http.HandleFunc("/register", register)
+	http.HandleFunc("/dhcp6", getdhcp6)
 
 	log.Printf("Server läuft auf http://localhost%s  (Präfix %s, DNS1 %s, DNS2 %s, Limit %d)", listenAddr, ulaPrefix, dns1, dns2, rangeLimit)
 	log.Fatal(http.ListenAndServe(listenAddr, nil))
@@ -132,8 +236,8 @@ func handleRange(w http.ResponseWriter, r *http.Request) {
 			d.Error = err.Error()
 		} else {
 			d.HaveResult = true
-			for a, b := range rows {
-				fmt.Println(a, b)
+			for _, b := range rows {
+				//fmt.Println(a, b)
 				octets := strings.Split(b.IPv4, ".")
 				if len(octets) != 4 {
 					fmt.Println("Ungültige IP-Adresse!")
@@ -262,10 +366,11 @@ func initConfigAndTemplates() {
 	rangeHTML := rangePageHTML
 	singleTemplate = template.Must(template.New("single").Parse(singleHTML))
 	rangeTemplate = template.Must(template.New("range").Parse(rangeHTML))
+	dhcpTemplate = template.Must(template.New("range").Parse(rangeDHCP6HTML))
 
 	fmt.Println(ulaPrefix, dns1, dns2, pageIP, dhcpServer, dhcpScope, rangeLimit)
-	fmt.Println(singleHTML)
-	fmt.Println(rangeHTML)
+	//fmt.Println(singleHTML)
+	//fmt.Println(rangeHTML)
 }
 
 // ---------------------------------------------------------------------------
@@ -349,3 +454,26 @@ var rangePageHTML = `<!DOCTYPE html>
 {{end}}
 {{if .Error}}<p style="color:#b00">Fehler: {{.Error}}</p>{{end}}
 </body></html>`
+
+var rangeDHCP6HTML = `<!DOCTYPE html>
+<html lang="de">
+<head>
+<meta charset="utf-8" />
+<title>DHCP-IPv6</title>
+<style>
+ body{font-family:system-ui,sans-serif;margin:2rem}
+ table{border-collapse:collapse;width:100%}
+ th,td{border:1px solid #ccc;padding:.4rem;text-align:left;font-family:monospace}
+ form{display:flex;gap:.5rem;flex-wrap:wrap;margin-bottom:1rem}
+ input[type=text]{padding:.4rem;font-size:1rem;border:1px solid #ccc;border-radius:4px;flex:1}
+ button{padding:.5rem 1rem;font-size:1rem;cursor:pointer;border-radius:4px;border:1px solid #666;background:#eee}
+</style>
+</head><body>
+<h1>DHCPv6 - DUID-Registrierung</h1>
+<table>
+ <tr><th>Hostname</th><th>Duid</th><th>IPv4</th><th>IPv6</th><th>DHCP6</th></tr>
+ {{range .}}<tr><td>{{.Hostname}}</td><td>{{.DUID}}</td><td>{{.CalculatedIPv4}}</td><td>{{.CalculatedIPv6}}</td><td>Add-DhcpServerv6Reservation -ComputerName {{.DhcpServer}} -Prefix {{.Dhcp6Scope}} -IPAddress {{.CalculatedIPv6}} -ClientDuid {{.DUID}} -Iaid {{.IAID}} -Name {{.Hostname}}.{{.DomainName}} -Description "Auto-reserved after rollout"</td></tr>{{end}}
+</table>
+</body></html>`
+
+//Add-DhcpServerv6Reservation -ComputerName $Srv -Prefix $Prefix -IPAddress IPv6Address -ClientDuid  $l.ClientDuid -Iaid $l.Iaid -Name $l.HostName -Description "Auto-reserved after rollout"