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package dhcpv6
import (
"log"
"net"
"testing"
"time"
"errors"
"github.com/stretchr/testify/require"
)
// utility function to return the loopback interface name
func getLoopbackInterface() (string, error) {
var ifaces []net.Interface
var err error
if ifaces, err = net.Interfaces(); err != nil {
return "", err
}
for _, iface := range ifaces {
if iface.Flags & net.FlagLoopback != 0 || iface.Name[:2] == "lo" {
return iface.Name, nil
}
}
return "", errors.New("No loopback interface found")
}
// utility function to set up a client and a server instance and run it in
// background. The caller needs to call Server.Close() once finished.
func setUpClientAndServer(handler Handler) (*Client, *Server) {
laddr := net.UDPAddr{
IP: net.ParseIP("::1"),
Port: 0,
}
s := NewServer(laddr, handler)
go s.ActivateAndServe()
c := NewClient()
c.LocalAddr = &net.UDPAddr{
IP: net.ParseIP("::1"),
}
for {
if s.LocalAddr() != nil {
break
}
time.Sleep(10 * time.Millisecond)
log.Printf("Waiting for server to run...")
}
c.RemoteAddr = &net.UDPAddr{
IP: net.ParseIP("::1"),
Port: s.LocalAddr().(*net.UDPAddr).Port,
}
return c, s
}
func TestNewServer(t *testing.T) {
laddr := net.UDPAddr{
IP: net.ParseIP("::1"),
Port: 0,
}
handler := func(conn net.PacketConn, peer net.Addr, m DHCPv6) {}
s := NewServer(laddr, handler)
defer s.Close()
require.NotNil(t, s)
require.Nil(t, s.conn)
require.Equal(t, laddr, s.localAddr)
require.NotNil(t, s.Handler)
}
func TestServerActivateAndServe(t *testing.T) {
handler := func(conn net.PacketConn, peer net.Addr, m DHCPv6) {
adv, err := NewAdvertiseFromSolicit(m)
if err != nil {
log.Printf("NewAdvertiseFromSolicit failed: %v", err)
return
}
if _, err := conn.WriteTo(adv.ToBytes(), peer); err != nil {
log.Printf("Cannot reply to client: %v", err)
}
}
c, s := setUpClientAndServer(handler)
defer s.Close()
iface, err := getLoopbackInterface()
require.NoError(t, err)
_, _, err = c.Solicit(iface, nil)
require.NoError(t, err)
}
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