add OptRelayAgentInformation (#193)

1 files changed, 67 insertions, 0 deletions

diff --git a/dhcpv4/option_relay_agent_information_test.go b/dhcpv4/option_relay_agent_information_test.go
new file mode 100644
index 0000000..1e99206
--- /dev/null
+++ b/dhcpv4/option_relay_agent_information_test.go
@@ -0,0 +1,67 @@
+package dhcpv4
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestParseOptRelayAgentInformation(t *testing.T) {
+	data := []byte{
+		byte(OptionRelayAgentInformation),
+		13,
+		1, 5, 'l', 'i', 'n', 'u', 'x',
+		2, 4, 'b', 'o', 'o', 't',
+	}
+
+	// short option bytes
+	opt, err := ParseOptRelayAgentInformation([]byte{})
+	require.Error(t, err)
+
+	// wrong code
+	opt, err = ParseOptRelayAgentInformation([]byte{1, 2, 1, 0})
+	require.Error(t, err)
+
+	// wrong option length
+	opt, err = ParseOptRelayAgentInformation([]byte{82, 3, 1, 0})
+	require.Error(t, err)
+
+	// short sub-option bytes
+	opt, err = ParseOptRelayAgentInformation([]byte{82, 3, 1, 0, 1})
+	require.Error(t, err)
+
+	// short sub-option length
+	opt, err = ParseOptRelayAgentInformation([]byte{82, 2, 1, 1})
+	require.Error(t, err)
+
+	opt, err = ParseOptRelayAgentInformation(data)
+	require.NoError(t, err)
+	require.Equal(t, len(opt.Options), 2)
+	circuit, ok := opt.Options[0].(*OptionGeneric)
+	require.True(t, ok)
+	remote, ok := opt.Options[1].(*OptionGeneric)
+	require.True(t, ok)
+	require.Equal(t, circuit.Data, []byte("linux"))
+	require.Equal(t, remote.Data, []byte("boot"))
+}
+
+func TestParseOptRelayAgentInformationToBytes(t *testing.T) {
+	opt := OptRelayAgentInformation{}
+	opt1 := &OptionGeneric{OptionCode: 1, Data: []byte("linux")}
+	opt.Options = append(opt.Options, opt1)
+	opt2 := &OptionGeneric{OptionCode: 2, Data: []byte("boot")}
+	opt.Options = append(opt.Options, opt2)
+	data := opt.ToBytes()
+	expected := []byte{
+		byte(OptionRelayAgentInformation),
+		13,
+		1, 5, 'l', 'i', 'n', 'u', 'x',
+		2, 4, 'b', 'o', 'o', 't',
+	}
+	require.Equal(t, expected, data)
+}
+
+func TestOptRelayAgentInformationToBytesString(t *testing.T) {
+	o := OptRelayAgentInformation{}
+	require.Equal(t, "Relay Agent Information -> []", o.String())
+}