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package dhcpv6
import (
"errors"
"fmt"
"net"
"reflect"
"testing"
"time"
"github.com/google/go-cmp/cmp"
"github.com/stretchr/testify/require"
"github.com/u-root/uio/uio"
)
func TestIAPDParseAndGetter(t *testing.T) {
for i, tt := range []struct {
buf []byte
err error
want []*OptIAPD
}{
{
buf: []byte{
0, 25, // IAPD option code
0, 41, // length
1, 0, 0, 0, // IAID
0, 0, 0, 1, // T1
0, 0, 0, 2, // T2
0, 26, 0, 25, // 26 = IAPrefix Option, 25 = length
0, 0, 0, 2, // IAPrefix preferredLifetime
0, 0, 0, 4, // IAPrefix validLifetime
36, // IAPrefix prefixLength
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, // IAPrefix ipv6Prefix
},
want: []*OptIAPD{
&OptIAPD{
IaId: [4]byte{1, 0, 0, 0},
T1: 1 * time.Second,
T2: 2 * time.Second,
Options: PDOptions{Options: Options{&OptIAPrefix{
PreferredLifetime: 2 * time.Second,
ValidLifetime: 4 * time.Second,
Prefix: &net.IPNet{
Mask: net.CIDRMask(36, 128),
IP: net.IP{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
},
Options: PrefixOptions{Options: Options{}},
}}},
},
},
},
{
buf: []byte{
0, 25, // IAPD option code
0, 41, // length
1, 0, 0, 0, // IAID
0, 0, 0, 1, // T1
0, 0, 0, 2, // T2
0, 26, 0, 25, // 26 = IAPrefix Option, 25 = length
0, 0, 0, 2, // IAPrefix preferredLifetime
0, 0, 0, 4, // IAPrefix validLifetime
36, // IAPrefix prefixLength
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, // IAPrefix ipv6Prefix
0, 25, // IAPD option code
0, 41, // length
1, 2, 3, 4, // IAID
0, 0, 0, 5, // T1
0, 0, 0, 6, // T2
0, 26, 0, 25, // 26 = IAPrefix Option, 25 = length
0, 0, 0, 2, // IAPrefix preferredLifetime
0, 0, 0, 4, // IAPrefix validLifetime
36, // IAPrefix prefixLength
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, // IAPrefix ipv6Prefix
},
want: []*OptIAPD{
&OptIAPD{
IaId: [4]byte{1, 0, 0, 0},
T1: 1 * time.Second,
T2: 2 * time.Second,
Options: PDOptions{Options: Options{&OptIAPrefix{
PreferredLifetime: 2 * time.Second,
ValidLifetime: 4 * time.Second,
Prefix: &net.IPNet{
Mask: net.CIDRMask(36, 128),
IP: net.IP{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
},
Options: PrefixOptions{Options: Options{}},
}}},
},
&OptIAPD{
IaId: [4]byte{1, 2, 3, 4},
T1: 5 * time.Second,
T2: 6 * time.Second,
Options: PDOptions{Options: Options{&OptIAPrefix{
PreferredLifetime: 2 * time.Second,
ValidLifetime: 4 * time.Second,
Prefix: &net.IPNet{
Mask: net.CIDRMask(36, 128),
IP: net.IP{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
},
Options: PrefixOptions{Options: Options{}},
}}},
},
},
},
{
buf: nil,
want: nil,
},
{
buf: []byte{0, 25, 0, 1, 0},
want: nil,
err: uio.ErrUnreadBytes,
},
{
buf: []byte{
0, 25, // IAPD option code
0, 8, // length
1, 0, 0, 0, // IAID
0, 0, 0, 1, // T1
// truncated from here
},
want: nil,
err: uio.ErrBufferTooShort,
},
{
buf: []byte{
0, 25, // IAPD option code
0, 36, // length
1, 0, 0, 0, // IAID
0, 0, 0, 1, // T1
0, 0, 0, 2, // T2
0, 26, 0, 4, // 26 = IAPrefix Option, 4 = length
0, 0, 0, 2, // IAPrefix preferredLifetime
// Missing stuff
},
want: nil,
err: uio.ErrBufferTooShort,
},
} {
t.Run(fmt.Sprintf("%d", i), func(t *testing.T) {
var mo MessageOptions
if err := mo.FromBytes(tt.buf); !errors.Is(err, tt.err) {
t.Errorf("FromBytes = %v, want %v", err, tt.err)
}
if got := mo.IAPD(); !reflect.DeepEqual(got, tt.want) {
t.Errorf("IAPD = %v, want %v", got, tt.want)
}
var wantOne *OptIAPD
if len(tt.want) >= 1 {
wantOne = tt.want[0]
}
if got := mo.OneIAPD(); !reflect.DeepEqual(got, wantOne) {
t.Errorf("OneIAPD = %v, want %v", got, wantOne)
}
if len(tt.want) >= 1 {
var b MessageOptions
for _, iana := range tt.want {
b.Add(iana)
}
got := b.ToBytes()
if diff := cmp.Diff(tt.buf, got); diff != "" {
t.Errorf("ToBytes mismatch (-want, +got): %s", diff)
}
}
})
}
}
func TestOptIAPDString(t *testing.T) {
data := []byte{
1, 0, 0, 0, // IAID
0, 0, 0, 1, // T1
0, 0, 0, 2, // T2
0, 26, 0, 25, // 26 = IAPrefix Option, 25 = length
0xaa, 0xbb, 0xcc, 0xdd, // IAPrefix preferredLifetime
0xee, 0xff, 0x00, 0x11, // IAPrefix validLifetime
36, // IAPrefix prefixLength
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, // IAPrefix ipv6Prefix
}
var opt OptIAPD
err := opt.FromBytes(data)
require.NoError(t, err)
str := opt.String()
require.Contains(
t, str,
"IAID=0x01000000",
"String() should return the IAID",
)
require.Contains(
t, str,
"T1=1s T2=2s",
"String() should return the T1/T2 options",
)
require.Contains(
t, str,
"Options={",
"String() should return a list of options",
)
}
|
