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// Copyright 2018-present the CoreDHCP Authors. All rights reserved
// This source code is licensed under the MIT license found in the
// LICENSE file in the root directory of this source tree.
package dns
import (
"net"
"testing"
"github.com/insomniacslk/dhcp/dhcpv4"
"github.com/insomniacslk/dhcp/dhcpv6"
)
func TestAddServer6(t *testing.T) {
req, err := dhcpv6.NewMessage()
if err != nil {
t.Fatal(err)
}
req.MessageType = dhcpv6.MessageTypeRequest
req.AddOption(dhcpv6.OptRequestedOption(dhcpv6.OptionDNSRecursiveNameServer))
stub, err := dhcpv6.NewMessage()
if err != nil {
t.Fatal(err)
}
stub.MessageType = dhcpv6.MessageTypeReply
dnsServers6 = []net.IP{
net.ParseIP("2001:db8::1"),
net.ParseIP("2001:db8::3"),
}
resp, stop := Handler6(req, stub)
if resp == nil {
t.Fatal("plugin did not return a message")
}
if stop {
t.Error("plugin interrupted processing")
}
opts := resp.GetOption(dhcpv6.OptionDNSRecursiveNameServer)
if len(opts) != 1 {
t.Fatalf("Expected 1 RDNSS option, got %d: %v", len(opts), opts)
}
foundServers := resp.(*dhcpv6.Message).Options.DNS()
// XXX: is enforcing the order relevant here ?
for i, srv := range foundServers {
if !srv.Equal(dnsServers6[i]) {
t.Errorf("Found server %s, expected %s", srv, dnsServers6[i])
}
}
if len(foundServers) != len(dnsServers6) {
t.Errorf("Found %d servers, expected %d", len(foundServers), len(dnsServers6))
}
}
func TestNotRequested6(t *testing.T) {
req, err := dhcpv6.NewMessage()
if err != nil {
t.Fatal(err)
}
req.MessageType = dhcpv6.MessageTypeRequest
req.AddOption(dhcpv6.OptRequestedOption())
stub, err := dhcpv6.NewMessage()
if err != nil {
t.Fatal(err)
}
stub.MessageType = dhcpv6.MessageTypeReply
dnsServers6 = []net.IP{
net.ParseIP("2001:db8::1"),
}
resp, stop := Handler6(req, stub)
if resp == nil {
t.Fatal("plugin did not return a message")
}
if stop {
t.Error("plugin interrupted processing")
}
opts := resp.GetOption(dhcpv6.OptionDNSRecursiveNameServer)
if len(opts) != 0 {
t.Errorf("RDNSS options were added when not requested: %v", opts)
}
}
func TestAddServer4(t *testing.T) {
req, err := dhcpv4.NewDiscovery(net.HardwareAddr{0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff})
if err != nil {
t.Fatal(err)
}
stub, err := dhcpv4.NewReplyFromRequest(req)
if err != nil {
t.Fatal(err)
}
dnsServers4 = []net.IP{
net.ParseIP("192.0.2.1"),
net.ParseIP("192.0.2.3"),
}
resp, stop := Handler4(req, stub)
if resp == nil {
t.Fatal("plugin did not return a message")
}
if stop {
t.Error("plugin interrupted processing")
}
servers := resp.DNS()
for i, srv := range servers {
if !srv.Equal(dnsServers4[i]) {
t.Errorf("Found server %s, expected %s", srv, dnsServers4[i])
}
}
if len(servers) != len(dnsServers4) {
t.Errorf("Found %d servers, expected %d", len(servers), len(dnsServers4))
}
}
func TestNotRequested4(t *testing.T) {
req, err := dhcpv4.NewDiscovery(net.HardwareAddr{0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff})
if err != nil {
t.Fatal(err)
}
stub, err := dhcpv4.NewReplyFromRequest(req)
if err != nil {
t.Fatal(err)
}
dnsServers4 = []net.IP{
net.ParseIP("192.0.2.1"),
}
req.UpdateOption(dhcpv4.OptParameterRequestList(dhcpv4.OptionBroadcastAddress))
resp, stop := Handler4(req, stub)
if resp == nil {
t.Fatal("plugin did not return a message")
}
if stop {
t.Error("plugin interrupted processing")
}
servers := dhcpv4.GetIPs(dhcpv4.OptionDomainNameServer, resp.Options)
if len(servers) != 0 {
t.Errorf("Found %d DNS servers when explicitly not requested", len(servers))
}
}
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