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|
package dhcp6opts
import (
"bytes"
"io"
"net"
"reflect"
"testing"
"github.com/mdlayher/dhcp6"
)
// TestRelayMessageMarshalBinary verifies that RelayMessage.MarshalBinary allocates and returns a correct
// byte slice for a variety of input data.
func TestRelayMessageMarshalBinary(t *testing.T) {
var tests = []struct {
desc string
relayMsg *RelayMessage
buf []byte
}{
{
desc: "empty packet",
relayMsg: &RelayMessage{},
buf: make([]byte, 34),
},
{
desc: "RelayForw only",
relayMsg: &RelayMessage{
MessageType: dhcp6.MessageTypeRelayForw,
},
buf: []byte{12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
},
{
desc: "RelayReply only",
relayMsg: &RelayMessage{
MessageType: dhcp6.MessageTypeRelayRepl,
},
buf: []byte{13, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
},
{
desc: "RelayForw, 15 Hopcount, [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16] LinkAddress, [17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32] PeerAddress",
relayMsg: &RelayMessage{
MessageType: dhcp6.MessageTypeRelayForw,
HopCount: 15,
LinkAddress: net.IP([]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}),
PeerAddress: net.IP([]byte{17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32}),
},
buf: []byte{12, 15, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32},
},
}
for i, tt := range tests {
buf, err := tt.relayMsg.MarshalBinary()
if err != nil {
t.Fatal(err)
}
if want, got := tt.buf, buf; !bytes.Equal(want, got) {
t.Fatalf("[%02d] test %q, unexpected packet bytes:\n- want: %v\n- got: %v",
i, tt.desc, want, got)
}
}
}
// TestRelayMessageUnmarshalBinary verifies that RelayMessage.UnmarshalBinary returns
// appropriate RelayMessages and errors for various input byte slices.
func TestRelayMessageUnmarshalBinary(t *testing.T) {
var tests = []struct {
desc string
buf []byte
relayMsg *RelayMessage
err error
}{
{
desc: "nil buffer, malformed packet",
err: io.ErrUnexpectedEOF,
},
{
desc: "empty buffer, malformed packet",
buf: []byte{},
err: io.ErrUnexpectedEOF,
},
{
desc: "length 1 buffer, malformed packet",
buf: []byte{0},
err: io.ErrUnexpectedEOF,
},
{
desc: "length 33 buffer, malformed packet",
buf: make([]byte, 33),
err: io.ErrUnexpectedEOF,
},
{
desc: "invalid options in packet",
buf: []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1},
err: dhcp6.ErrInvalidPacket,
},
{
desc: "length 34 buffer, OK",
buf: []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
relayMsg: &RelayMessage{
LinkAddress: net.IP(make([]byte, net.IPv6len)),
PeerAddress: net.IP(make([]byte, net.IPv6len)),
Options: make(dhcp6.Options),
},
},
{
desc: "RelayForw, 15 Hopcount, [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16] LinkAddress, [17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32] PeerAddress",
buf: []byte{12, 15, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32},
relayMsg: &RelayMessage{
MessageType: dhcp6.MessageTypeRelayForw,
HopCount: 15,
LinkAddress: net.IP([]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}),
PeerAddress: net.IP([]byte{17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32}),
Options: make(dhcp6.Options),
},
},
}
for i, tt := range tests {
p := new(RelayMessage)
if err := p.UnmarshalBinary(tt.buf); err != nil {
if want, got := tt.err, err; want != got {
t.Errorf("[%02d] test %q, unexpected error: %v != %v",
i, tt.desc, want, got)
}
continue
}
if want, got := tt.relayMsg, p; !reflect.DeepEqual(want, got) {
t.Errorf("[%02d] test %q, unexpected packet:\n- want: %v\n- got: %v",
i, tt.desc, want, got)
}
}
}
|
