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package dhcpv6
import (
"errors"
"fmt"
"net"
"testing"
"github.com/insomniacslk/dhcp/iana"
"github.com/stretchr/testify/mock"
"github.com/stretchr/testify/require"
"github.com/stretchr/testify/suite"
)
var ErrDummy = errors.New("dummy error")
type MatchingAddressTestSuite struct {
suite.Suite
m mock.Mock
ips []net.IP
addrs []net.Addr
}
func (s *MatchingAddressTestSuite) InterfaceAddresses(name string) ([]net.Addr, error) {
args := s.m.Called(name)
if args.Get(0) == nil {
return nil, args.Error(1)
}
if ifaddrs, ok := args.Get(0).([]net.Addr); ok {
return ifaddrs, args.Error(1)
}
panic(fmt.Sprintf("assert: arguments: InterfaceAddresses(0) failed because object wasn't correct type: %v", args.Get(0)))
}
func (s *MatchingAddressTestSuite) Match(ip net.IP) bool {
args := s.m.Called(ip)
return args.Bool(0)
}
func (s *MatchingAddressTestSuite) SetupTest() {
InterfaceAddresses = s.InterfaceAddresses
s.ips = []net.IP{
net.ParseIP("2401:db00:3020:70e1:face:0:7e:0"),
net.ParseIP("2803:6080:890c:847e::1"),
net.ParseIP("fe80::4a57:ddff:fe04:d8e9"),
}
s.addrs = []net.Addr{}
for _, ip := range s.ips {
s.addrs = append(s.addrs, &net.IPNet{IP: ip})
}
}
func (s *MatchingAddressTestSuite) TestGetMatchingAddr() {
// Check if error from InterfaceAddresses immediately returns error
s.m.On("InterfaceAddresses", "eth0").Return(nil, ErrDummy).Once()
_, err := getMatchingAddr("eth0", s.Match)
s.Assert().Equal(ErrDummy, err)
s.m.AssertExpectations(s.T())
// Check if the looping is stopped after finding a matching address
s.m.On("InterfaceAddresses", "eth0").Return(s.addrs, nil).Once()
s.m.On("Match", s.ips[0]).Return(false).Once()
s.m.On("Match", s.ips[1]).Return(true).Once()
ip, err := getMatchingAddr("eth0", s.Match)
s.Require().NoError(err)
s.Assert().Equal(s.ips[1], ip)
s.m.AssertExpectations(s.T())
// Check if the looping skips not matching addresses
s.m.On("InterfaceAddresses", "eth0").Return(s.addrs, nil).Once()
s.m.On("Match", s.ips[0]).Return(false).Once()
s.m.On("Match", s.ips[1]).Return(false).Once()
s.m.On("Match", s.ips[2]).Return(true).Once()
ip, err = getMatchingAddr("eth0", s.Match)
s.Require().NoError(err)
s.Assert().Equal(s.ips[2], ip)
s.m.AssertExpectations(s.T())
// Check if the error is returned if no matching address is found
s.m.On("InterfaceAddresses", "eth0").Return(s.addrs, nil).Once()
s.m.On("Match", s.ips[0]).Return(false).Once()
s.m.On("Match", s.ips[1]).Return(false).Once()
s.m.On("Match", s.ips[2]).Return(false).Once()
_, err = getMatchingAddr("eth0", s.Match)
s.Assert().EqualError(err, "no matching address found for interface eth0")
s.m.AssertExpectations(s.T())
}
func (s *MatchingAddressTestSuite) TestGetLinkLocalAddr() {
s.m.On("InterfaceAddresses", "eth0").Return(s.addrs, nil).Once()
ip, err := GetLinkLocalAddr("eth0")
s.Require().NoError(err)
s.Assert().Equal(s.ips[2], ip)
s.m.AssertExpectations(s.T())
}
func (s *MatchingAddressTestSuite) TestGetGlobalAddr() {
s.m.On("InterfaceAddresses", "eth0").Return(s.addrs, nil).Once()
ip, err := GetGlobalAddr("eth0")
s.Require().NoError(err)
s.Assert().Equal(s.ips[0], ip)
s.m.AssertExpectations(s.T())
}
func TestMatchingAddressTestSuite(t *testing.T) {
suite.Run(t, new(MatchingAddressTestSuite))
}
func Test_ExtractMAC(t *testing.T) {
//SOLICIT message wrapped in Relay-Forw
var relayForwBytesDuidUUID = []byte{
0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0xfe, 0x80, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x26, 0x8a, 0x07, 0xff, 0xfe, 0x56,
0xdc, 0xa4, 0x00, 0x12, 0x00, 0x06, 0x24, 0x8a,
0x07, 0x56, 0xdc, 0xa4, 0x00, 0x09, 0x00, 0x5a,
0x06, 0x7d, 0x9b, 0xca, 0x00, 0x01, 0x00, 0x12,
0x00, 0x04, 0xb7, 0xfd, 0x0a, 0x8c, 0x1b, 0x14,
0x10, 0xaa, 0xeb, 0x0a, 0x5b, 0x3f, 0xe8, 0x9d,
0x0f, 0x56, 0x00, 0x06, 0x00, 0x0a, 0x00, 0x17,
0x00, 0x18, 0x00, 0x17, 0x00, 0x18, 0x00, 0x01,
0x00, 0x08, 0x00, 0x02, 0xff, 0xff, 0x00, 0x03,
0x00, 0x28, 0x07, 0x56, 0xdc, 0xa4, 0x00, 0x00,
0x0e, 0x10, 0x00, 0x00, 0x15, 0x18, 0x00, 0x05,
0x00, 0x18, 0x26, 0x20, 0x01, 0x0d, 0xc0, 0x82,
0x90, 0x63, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xaf, 0xa0, 0x00, 0x00, 0x1c, 0x20, 0x00, 0x00,
0x1d, 0x4c}
packet, err := FromBytes(relayForwBytesDuidUUID)
require.NoError(t, err)
mac, err := ExtractMAC(packet)
require.NoError(t, err)
require.Equal(t, mac.String(), "24:8a:07:56:dc:a4")
// MAC extracted from DUID
duid := Duid{
Type: DUID_LL,
HwType: iana.HwTypeEthernet,
LinkLayerAddr: []byte{0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa},
}
solicit, err := NewMessage(WithClientID(duid))
require.NoError(t, err)
relay, err := EncapsulateRelay(solicit, MessageTypeRelayForward, net.IPv6zero, net.IPv6zero)
require.NoError(t, err)
mac, err = ExtractMAC(relay)
require.NoError(t, err)
require.Equal(t, mac.String(), "aa:aa:aa:aa:aa:aa")
// no client ID
solicit, err = NewMessage()
require.NoError(t, err)
mac, err = ExtractMAC(solicit)
require.Error(t, err)
// DUID is not DuidLL or DuidLLT
duid = Duid{}
solicit, err = NewMessage(WithClientID(duid))
require.NoError(t, err)
mac, err = ExtractMAC(solicit)
require.Error(t, err)
}
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