Add support for DHCPv6-PD sub-options (#166)

1 files changed, 132 insertions, 0 deletions

diff --git a/dhcpv6/option_prefixdelegation_test.go b/dhcpv6/option_prefixdelegation_test.go
new file mode 100644
index 0000000..caedd40
--- /dev/null
+++ b/dhcpv6/option_prefixdelegation_test.go
@@ -0,0 +1,132 @@
+package dhcpv6
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestOptIAForPrefixDelegationParseOptIAForPrefixDelegation(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
+	}
+	opt, err := ParseOptIAForPrefixDelegation(data)
+	require.NoError(t, err)
+	require.Equal(t, len(data), opt.Length())
+}
+
+func TestOptIAForPrefixDelegationParseOptIAForPrefixDelegationInvalidLength(t *testing.T) {
+	data := []byte{
+		1, 0, 0, 0, // IAID
+		0, 0, 0, 1, // T1
+		// truncated from here
+	}
+	_, err := ParseOptIAForPrefixDelegation(data)
+	require.Error(t, err)
+}
+
+func TestOptIAForPrefixDelegationParseOptIAForPrefixDelegationInvalidOptions(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, // IAPrefix ipv6Prefix missing last byte
+	}
+	_, err := ParseOptIAForPrefixDelegation(data)
+	require.Error(t, err)
+}
+
+func TestOptIAForPrefixDelegationGetOneOption(t *testing.T) {
+	buf := []byte{
+		0xaa, 0xbb, 0xcc, 0xdd,                         // preferredLifetime
+		0xee, 0xff, 0x00, 0x11,                         // validLifetime
+		36,                                             // prefixLength
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, // ipv6Prefix
+	}
+	oaddr, err := ParseOptIAPrefix(buf)
+	if err != nil {
+		t.Fatal(err)
+	}
+	opt := OptIAForPrefixDelegation{}
+	opt.SetOptions(oaddr.ToBytes())
+	require.Equal(t, oaddr, opt.GetOneOption(OptionIAPrefix))
+}
+
+func TestOptIAForPrefixDelegationGetOneOptionMissingOpt(t *testing.T) {
+	buf := []byte{
+		0xaa, 0xbb, 0xcc, 0xdd,                         // preferredLifetime
+		0xee, 0xff, 0x00, 0x11,                         // validLifetime
+		36,                                             // prefixLength
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, // ipv6Prefix
+	}
+	oaddr, err := ParseOptIAPrefix(buf)
+	if err != nil {
+		t.Fatal(err)
+	}
+	opt := OptIAForPrefixDelegation{}
+	opt.SetOptions(oaddr.ToBytes())
+	require.Equal(t, nil, opt.GetOneOption(OptionDNSRecursiveNameServer))
+}
+
+func TestOptIAForPrefixDelegationDelOption(t *testing.T) {
+	optiana1 := OptIAForPrefixDelegation{}
+	optiana2 := OptIAForPrefixDelegation{}
+	optiaaddr := OptIAPrefix{}
+	optsc := OptStatusCode{}
+
+	var buf = make([]byte, 0)
+
+	buf = append(buf, optsc.ToBytes()...)
+	buf = append(buf, optiaaddr.ToBytes()...)
+	buf = append(buf, optiaaddr.ToBytes()...)
+	optiana1.SetOptions(buf)
+	optiana1.DelOption(OptionIAPrefix)
+	require.Equal(t, optiana1.Options(), optsc.ToBytes())
+
+	buf = make([]byte, 0)
+	buf = append(buf, optiaaddr.ToBytes()...)
+	buf = append(buf, optsc.ToBytes()...)
+	buf = append(buf, optiaaddr.ToBytes()...)
+	optiana2.SetOptions(buf)
+	optiana2.DelOption(OptionIAPrefix)
+	require.Equal(t, optiana2.Options(), optsc.ToBytes())
+}
+
+func TestOptIAForPrefixDelegationToBytes(t *testing.T) {
+	oaddr := OptIAPrefix{}
+	oaddr.SetPreferredLifetime(0xaabbccdd)
+	oaddr.SetValidLifetime(0xeeff0011)
+	oaddr.SetPrefixLength(36)
+	oaddr.SetIPv6Prefix([16]byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1})
+
+	opt := OptIAForPrefixDelegation{
+		iaId: [4]byte{1, 2, 3, 4},
+		t1:   12345,
+		t2:   54321,
+	}
+	opt.SetOptions(oaddr.ToBytes())
+	expected := []byte{
+		0, 25, // OptionIAPD
+		0, 41, // length
+		1, 2, 3, 4, // IA ID
+		0, 0, 0x30, 0x39, // T1 = 12345
+		0, 0, 0xd4, 0x31, // T2 = 54321
+		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
+	}
+	require.Equal(t, expected, opt.ToBytes())
+}