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package server6
import (
"context"
"log"
"net"
"testing"
"github.com/insomniacslk/dhcp/dhcpv6"
"github.com/insomniacslk/dhcp/dhcpv6/nclient6"
"github.com/insomniacslk/dhcp/interfaces"
"github.com/stretchr/testify/require"
)
// Turns a connected UDP conn into an "unconnected" UDP conn.
type unconnectedConn struct {
*net.UDPConn
}
func (f unconnectedConn) WriteTo(b []byte, _ net.Addr) (int, error) {
return f.UDPConn.Write(b)
}
func (f unconnectedConn) ReadFrom(b []byte) (int, net.Addr, error) {
n, err := f.Read(b)
return n, nil, err
}
// 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) (*nclient6.Client, *Server) {
laddr := &net.UDPAddr{
IP: net.ParseIP("::1"),
Port: 0,
}
s, err := NewServer("", laddr, handler)
if err != nil {
panic(err)
}
go func() {
_ = s.Serve()
}()
clientConn, err := net.DialUDP("udp6", &net.UDPAddr{IP: net.ParseIP("::1")}, s.conn.LocalAddr().(*net.UDPAddr))
if err != nil {
panic(err)
}
c, err := nclient6.NewWithConn(unconnectedConn{clientConn}, net.HardwareAddr{1, 2, 3, 4, 5, 6})
if err != nil {
panic(err)
}
return c, s
}
func TestServer(t *testing.T) {
handler := func(conn net.PacketConn, peer net.Addr, m dhcpv6.DHCPv6) {
msg := m.(*dhcpv6.Message)
adv, err := dhcpv6.NewAdvertiseFromSolicit(msg)
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()
ifaces, err := interfaces.GetLoopbackInterfaces()
require.NoError(t, err)
require.NotEqual(t, 0, len(ifaces))
_, err = c.Solicit(context.Background(), dhcpv6.WithRapidCommit)
require.NoError(t, err)
}
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