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package async
import (
"net"
"testing"
"time"
"github.com/stretchr/testify/require"
"github.com/insomniacslk/dhcp/dhcpv6"
"github.com/insomniacslk/dhcp/iana"
)
// solicit creates new solicit based on the mac address
func solicit(input string) (dhcpv6.DHCPv6, error) {
mac, err := net.ParseMAC(input)
if err != nil {
return nil, err
}
duid := dhcpv6.Duid{
Type: dhcpv6.DUID_LLT,
HwType: iana.HwTypeEthernet,
Time: dhcpv6.GetTime(),
LinkLayerAddr: mac,
}
return dhcpv6.NewSolicitWithCID(duid)
}
// server creates a server which responds with predefined answers
func serve(t *testing.T, addr *net.UDPAddr, responses ...dhcpv6.DHCPv6) {
conn, err := net.ListenUDP("udp6", addr)
require.NoError(t, err)
defer conn.Close()
oobdata := []byte{}
buffer := make([]byte, dhcpv6.MaxUDPReceivedPacketSize)
for _, packet := range responses {
n, _, _, src, err := conn.ReadMsgUDP(buffer, oobdata)
require.NoError(t, err)
_, err = dhcpv6.FromBytes(buffer[:n])
require.NoError(t, err)
_, err = conn.WriteTo(packet.ToBytes(), src)
require.NoError(t, err)
}
}
func TestNewClient(t *testing.T) {
c := NewClient()
require.NotNil(t, c)
require.Equal(t, c.ReadTimeout, dhcpv6.DefaultReadTimeout)
require.Equal(t, c.ReadTimeout, dhcpv6.DefaultWriteTimeout)
}
func TestOpenInvalidAddrFailes(t *testing.T) {
c := NewClient()
err := c.Open(512)
require.Error(t, err)
}
// This test uses port 15438 so please make sure its not used before running
func TestOpenClose(t *testing.T) {
c := NewClient()
addr, err := net.ResolveUDPAddr("udp6", ":15438")
require.NoError(t, err)
c.LocalAddr = addr
err = c.Open(512)
require.NoError(t, err)
defer c.Close()
}
// This test uses ports 15438 and 15439 so please make sure they are not used
// before running
func TestSendTimeout(t *testing.T) {
c := NewClient()
addr, err := net.ResolveUDPAddr("udp6", ":15438")
require.NoError(t, err)
remote, err := net.ResolveUDPAddr("udp6", ":15439")
require.NoError(t, err)
c.ReadTimeout = 50 * time.Millisecond
c.WriteTimeout = 50 * time.Millisecond
c.LocalAddr = addr
c.RemoteAddr = remote
err = c.Open(512)
require.NoError(t, err)
defer c.Close()
m, err := dhcpv6.NewMessage()
require.NoError(t, err)
_, err, timeout := c.Send(m).GetOrTimeout(200)
require.NoError(t, err)
require.True(t, timeout)
}
// This test uses ports 15438 and 15439 so please make sure they are not used
// before running
func TestSend(t *testing.T) {
s, err := solicit("c8:6c:2c:47:96:fd")
require.NoError(t, err)
require.NotNil(t, s)
a, err := dhcpv6.NewAdvertiseFromSolicit(s)
require.NoError(t, err)
require.NotNil(t, a)
c := NewClient()
addr, err := net.ResolveUDPAddr("udp6", ":15438")
require.NoError(t, err)
remote, err := net.ResolveUDPAddr("udp6", ":15439")
require.NoError(t, err)
c.LocalAddr = addr
c.RemoteAddr = remote
go serve(t, remote, a)
err = c.Open(16)
require.NoError(t, err)
defer c.Close()
f := c.Send(s)
response, err, timeout := f.GetOrTimeout(1000)
require.False(t, timeout)
require.NoError(t, err)
require.Equal(t, a, response)
}
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