Initial commit of fork

go.mod

@@ -3,6 +3,7 @@ module git.hugfreevikings.wtf/UniventionDNS2Go
 go 1.18
 
 require (
+	github.com/zcalusic/sysinfo v0.9.5 // indirect
 	gopkg.in/asn1-ber.v1 v1.0.0-20181015200546-f715ec2f112d // indirect
 	gopkg.in/ldap.v2 v2.5.1 // indirect
 )

go.sum

@@ -1,3 +1,5 @@
+github.com/zcalusic/sysinfo v0.9.5 h1:ivoHyj9aIAYkwzo1+8QgJ5s4oeE6Etx9FmZtqa4wJjQ=
+github.com/zcalusic/sysinfo v0.9.5/go.mod h1:Z/gPVufBrFc8X5sef3m6kkw3r3nlNFp+I6bvASfvBZQ=
 gopkg.in/asn1-ber.v1 v1.0.0-20181015200546-f715ec2f112d h1:TxyelI5cVkbREznMhfzycHdkp5cLA7DpE+GKjSslYhM=
 gopkg.in/asn1-ber.v1 v1.0.0-20181015200546-f715ec2f112d/go.mod h1:cuepJuh7vyXfUyUwEgHQXw849cJrilpS5NeIjOWESAw=
 gopkg.in/ldap.v2 v2.5.1 h1:wiu0okdNfjlBzg6UWvd1Hn8Y+Ux17/u/4nlk4CQr6tU=

main.go

@@ -3,22 +3,24 @@ package main
 import (
 	"bufio"
 	"crypto/tls"
-	"encoding/json"
 	"flag"
 	"fmt"
-	"io/ioutil"
 	"log"
-	"net/http"
+	"net"
 	"os"
+	"os/user"
+	"runtime"
 	"strings"
 
+	"github.com/zcalusic/sysinfo"
 	"gopkg.in/ldap.v2"
 )
 
 var (
 	configFile string
-	domain     string
 	host       string
+	domain     string
+	role       string
 
 	ldap_uri             string
 	ldap_default_bind_dn string
@@ -31,13 +33,29 @@ type IP struct {
 }
 
 func init() {
+	test, err := os.Hostname()
+	if err == nil {
+		host = test
+	}
 	flag.StringVar(&configFile, "c", "/etc/sssd/sssd.conf", "Path to SSSD Config.")
-	flag.StringVar(&host, "h", host, "Host ID for DNS (relativeDomainName)")
+	flag.StringVar(&host, "h", "", "Host ID")
-	flag.StringVar(&domain, "d", "", "Domain for DNS (zoneName)")
+	flag.StringVar(&domain, "d", "", "Domain for association")
 	flag.Parse()
 }
 
 func main() {
+	current, err := user.Current()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	if current.Uid != "0" {
+		log.Fatal("requires superuser privilege")
+	}
+
+	var si sysinfo.SysInfo
+
+	si.GetSysInfo()
 	log.Printf("Using %+v as config file path", configFile)
 
 	file, err := os.Open(configFile)
@@ -93,10 +111,12 @@ func main() {
 	log.Printf("Connected as read-only user, searching for DNS Record")
 	// Search for the given username
 	searchRequest := ldap.NewSearchRequest(
-		fmt.Sprintf("zoneName=%s,cn=dns,%s", ldap.EscapeFilter(domain), ldap.EscapeFilter(ldap_search_base)),
+		fmt.Sprintf("cn=computers,%s", ldap.EscapeFilter(ldap_search_base)),
 		ldap.ScopeWholeSubtree, ldap.NeverDerefAliases, 0, 0, false,
-		fmt.Sprintf("(relativeDomainName=%s)", ldap.EscapeFilter(host)),
+		fmt.Sprintf("(cn=%s)", ldap.EscapeFilter(host)),
-		[]string{"dn","aRecord"},
+		[]string{"dn", "sn", "cn", "uid", "univentionObjectType", "description", "univentionOperatingSystem",
+			"univentionOperatingSystemVersion", "aRecord", "associatedDomain", "univentionNagiosEnabled",
+			"macAddress", "univentionInventoryNumber"},
 		nil,
 	)
 
@@ -108,36 +128,49 @@ func main() {
 	if len(sr.Entries) != 1 {
 		log.Fatalf("Host does not exist or too many entries returned (%+v)", len(sr.Entries))
 	}
-	log.Printf("Record found for %s.%s: %+v", host, domain, sr.Entries[0])
+	log.Printf("Record found for %s. %+v", host, sr.Entries[0])
-	newIp := getip2()
+	for _, attribute := range sr.Entries[0].Attributes {
-	if sr.Entries[0].GetAttributeValue("aRecord") == newIp {
+		log.Printf("%+v: %+v", attribute.Name, strings.Join(attribute.Values, ", "))
-		log.Println("New IP is same as old IP, exiting gracefully.")
-		return
 	}
+
+	var macAddresses []string
+	var ipAddresses []string
+	test, err := net.Interfaces()
+	if err != nil {
+		log.Fatalf("Unable to get network interfaces: %+v", err)
+	}
+	for _, v := range test {
+		macAddresses = append(macAddresses, v.HardwareAddr.String())
+		addrs, err := v.Addrs()
+		if err != nil {
+			log.Fatalf("Unable to get network interfaces: %+v", err)
+		}
+		for _, addr := range addrs {
+			switch v2 := addr.(type) {
+			case *net.IPNet:
+				ipAddresses = append(ipAddresses, v2.IP.String())
+			case *net.IPAddr:
+				ipAddresses = append(ipAddresses, v2.IP.String())
+			}
+		}
+	}
+
 	req := ldap.NewModifyRequest(sr.Entries[0].DN)
 
-	req.Replace("aRecord", []string{newIp})
+	req.Replace("univentionOperatingSystem", []string{si.OS.Name})
+	req.Replace("univentionOperatingSystemVersion", []string{fmt.Sprintf("%+v (%+v)", si.OS.Version, si.OS.Release)})
+	req.Replace("macAddress", macAddresses)
+	req.Replace("aRecord", ipAddresses)
+	req.Replace("univentionInventoryNumber", []string{si.Node.MachineID})
+	req.Replace("description", []string{si.Board.Name})
+	req.Replace("sn", []string{host})
+	req.Replace("cn", []string{host})
+	req.Replace("associatedDomain", []string{domain})
+	req.Replace("univentionObjectType", []string{fmt.Sprintf("computers/%s", runtime.GOOS)})
+
 	if err = l.Modify(req); err != nil {
 		log.Fatalf("Failed to modify DN: %s\n", err)
 	}
 	log.Printf("Updated record successfully.")
 
 }
-
-func getip2() string {
-	req, err := http.Get("http://ip-api.com/json/")
-	if err != nil {
-		return err.Error()
-	}
-	defer req.Body.Close()
-
-	body, err := ioutil.ReadAll(req.Body)
-	if err != nil {
-		return err.Error()
-	}
-
-	var ip IP
-	json.Unmarshal(body, &ip)
-	log.Printf("Detected IP as %s", ip.Query)
-	return ip.Query
-}