Start DHCP on launch if it's enabled in config.

app.go

@@ -192,6 +192,11 @@ func main() {
 		log.Fatal(err)
 	}
 
+	err = startDHCPServer()
+	if err != nil {
+		log.Fatal(err)
+	}
+
 	URL := fmt.Sprintf("http://%s", address)
 	log.Println("Go to " + URL)
 	log.Fatal(http.ListenAndServe(address, nil))

dhcp.go

@@ -6,6 +6,7 @@ import (
 	"net/http"
 
 	"github.com/AdguardTeam/AdGuardHome/dhcpd"
+	"github.com/joomcode/errorx"
 )
 
 var dhcpServer = dhcpd.Server{}
@@ -107,7 +108,6 @@ func handleDHCPInterfaces(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
-// implement
 func handleDHCPFindActiveServer(w http.ResponseWriter, r *http.Request) {
 	found, err := dhcpd.CheckIfOtherDHCPServersPresent(config.DHCP.InterfaceName)
 	result := map[string]interface{}{}
@@ -123,3 +123,11 @@ func handleDHCPFindActiveServer(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 }
+
+func startDHCPServer() error {
+	err := dhcpServer.Start(&config.DHCP)
+	if err != nil {
+		return errorx.Decorate(err, "Couldn't start DHCP server")
+	}
+	return nil
+}