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// Copyright 2018-present the CoreDHCP Authors. All rights reserved
// This source code is licensed under the MIT license found in the
// LICENSE file in the root directory of this source tree.
package file
import (
"net"
"os"
"testing"
"time"
"github.com/insomniacslk/dhcp/dhcpv4"
"github.com/insomniacslk/dhcp/dhcpv6"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestLoadDHCPv4Records(t *testing.T) {
t.Run("valid leases", func(t *testing.T) {
// setup temp leases file
tmp, err := os.CreateTemp("", "test_plugin_file")
require.NoError(t, err)
defer func() {
tmp.Close()
os.Remove(tmp.Name())
}()
// fill temp file with valid lease lines and some comments
_, err = tmp.WriteString("00:11:22:33:44:55 192.0.2.100\n")
require.NoError(t, err)
_, err = tmp.WriteString("11:22:33:44:55:66 192.0.2.101\n")
require.NoError(t, err)
_, err = tmp.WriteString("# this is a comment\n")
require.NoError(t, err)
records, err := LoadDHCPv4Records(tmp.Name())
if !assert.NoError(t, err) {
return
}
if assert.Equal(t, 2, len(records)) {
if assert.Contains(t, records, "00:11:22:33:44:55") {
assert.Equal(t, net.ParseIP("192.0.2.100"), records["00:11:22:33:44:55"])
}
if assert.Contains(t, records, "11:22:33:44:55:66") {
assert.Equal(t, net.ParseIP("192.0.2.101"), records["11:22:33:44:55:66"])
}
}
})
t.Run("missing field", func(t *testing.T) {
// setup temp leases file
tmp, err := os.CreateTemp("", "test_plugin_file")
require.NoError(t, err)
defer func() {
tmp.Close()
os.Remove(tmp.Name())
}()
// add line with too few fields
_, err = tmp.WriteString("foo\n")
require.NoError(t, err)
_, err = LoadDHCPv4Records(tmp.Name())
assert.Error(t, err)
})
t.Run("invalid MAC", func(t *testing.T) {
// setup temp leases file
tmp, err := os.CreateTemp("", "test_plugin_file")
require.NoError(t, err)
defer func() {
tmp.Close()
os.Remove(tmp.Name())
}()
// add line with invalid MAC address to trigger an error
_, err = tmp.WriteString("abcd 192.0.2.102\n")
require.NoError(t, err)
_, err = LoadDHCPv4Records(tmp.Name())
assert.Error(t, err)
})
t.Run("invalid IP address", func(t *testing.T) {
// setup temp leases file
tmp, err := os.CreateTemp("", "test_plugin_file")
require.NoError(t, err)
defer func() {
tmp.Close()
os.Remove(tmp.Name())
}()
// add line with invalid MAC address to trigger an error
_, err = tmp.WriteString("22:33:44:55:66:77 bcde\n")
require.NoError(t, err)
_, err = LoadDHCPv4Records(tmp.Name())
assert.Error(t, err)
})
t.Run("lease with IPv6 address", func(t *testing.T) {
// setup temp leases file
tmp, err := os.CreateTemp("", "test_plugin_file")
require.NoError(t, err)
defer func() {
tmp.Close()
os.Remove(tmp.Name())
}()
// add line with IPv6 address instead to trigger an error
_, err = tmp.WriteString("00:11:22:33:44:55 2001:db8::10:1\n")
require.NoError(t, err)
_, err = LoadDHCPv4Records(tmp.Name())
assert.Error(t, err)
})
}
func TestLoadDHCPv6Records(t *testing.T) {
t.Run("valid leases", func(t *testing.T) {
// setup temp leases file
tmp, err := os.CreateTemp("", "test_plugin_file")
require.NoError(t, err)
defer func() {
tmp.Close()
os.Remove(tmp.Name())
}()
// fill temp file with valid lease lines and some comments
_, err = tmp.WriteString("00:11:22:33:44:55 2001:db8::10:1\n")
require.NoError(t, err)
_, err = tmp.WriteString("11:22:33:44:55:66 2001:db8::10:2\n")
require.NoError(t, err)
_, err = tmp.WriteString("# this is a comment\n")
require.NoError(t, err)
records, err := LoadDHCPv6Records(tmp.Name())
if !assert.NoError(t, err) {
return
}
if assert.Equal(t, 2, len(records)) {
if assert.Contains(t, records, "00:11:22:33:44:55") {
assert.Equal(t, net.ParseIP("2001:db8::10:1"), records["00:11:22:33:44:55"])
}
if assert.Contains(t, records, "11:22:33:44:55:66") {
assert.Equal(t, net.ParseIP("2001:db8::10:2"), records["11:22:33:44:55:66"])
}
}
})
t.Run("missing field", func(t *testing.T) {
// setup temp leases file
tmp, err := os.CreateTemp("", "test_plugin_file")
require.NoError(t, err)
defer func() {
tmp.Close()
os.Remove(tmp.Name())
}()
// add line with too few fields
_, err = tmp.WriteString("foo\n")
require.NoError(t, err)
_, err = LoadDHCPv6Records(tmp.Name())
assert.Error(t, err)
})
t.Run("invalid MAC", func(t *testing.T) {
// setup temp leases file
tmp, err := os.CreateTemp("", "test_plugin_file")
require.NoError(t, err)
defer func() {
tmp.Close()
os.Remove(tmp.Name())
}()
// add line with invalid MAC address to trigger an error
_, err = tmp.WriteString("abcd 2001:db8::10:3\n")
require.NoError(t, err)
_, err = LoadDHCPv6Records(tmp.Name())
assert.Error(t, err)
})
t.Run("invalid IP address", func(t *testing.T) {
// setup temp leases file
tmp, err := os.CreateTemp("", "test_plugin_file")
require.NoError(t, err)
defer func() {
tmp.Close()
os.Remove(tmp.Name())
}()
// add line with invalid MAC address to trigger an error
_, err = tmp.WriteString("22:33:44:55:66:77 bcde\n")
require.NoError(t, err)
_, err = LoadDHCPv6Records(tmp.Name())
assert.Error(t, err)
})
t.Run("lease with IPv4 address", func(t *testing.T) {
// setup temp leases file
tmp, err := os.CreateTemp("", "test_plugin_file")
require.NoError(t, err)
defer func() {
tmp.Close()
os.Remove(tmp.Name())
}()
// add line with IPv4 address instead to trigger an error
_, err = tmp.WriteString("00:11:22:33:44:55 192.0.2.100\n")
require.NoError(t, err)
_, err = LoadDHCPv6Records(tmp.Name())
assert.Error(t, err)
})
}
func TestHandler4(t *testing.T) {
t.Run("unknown MAC", func(t *testing.T) {
// prepare DHCPv4 request
mac := "00:11:22:33:44:55"
claddr, _ := net.ParseMAC(mac)
req := &dhcpv4.DHCPv4{
ClientHWAddr: claddr,
}
resp := &dhcpv4.DHCPv4{}
assert.Nil(t, resp.ClientIPAddr)
// if we handle this DHCP request, nothing should change since the lease is
// unknown
result, stop := Handler4(req, resp)
assert.Same(t, result, resp)
assert.False(t, stop)
assert.Nil(t, result.YourIPAddr)
})
t.Run("known MAC", func(t *testing.T) {
// prepare DHCPv4 request
mac := "00:11:22:33:44:55"
claddr, _ := net.ParseMAC(mac)
req := &dhcpv4.DHCPv4{
ClientHWAddr: claddr,
}
resp := &dhcpv4.DHCPv4{}
assert.Nil(t, resp.ClientIPAddr)
// add lease for the MAC in the lease map
clIPAddr := net.ParseIP("192.0.2.100")
StaticRecords = map[string]net.IP{
mac: clIPAddr,
}
// if we handle this DHCP request, the YourIPAddr field should be set
// in the result
result, stop := Handler4(req, resp)
assert.Same(t, result, resp)
assert.True(t, stop)
assert.Equal(t, clIPAddr, result.YourIPAddr)
// cleanup
StaticRecords = make(map[string]net.IP)
})
}
func TestHandler6(t *testing.T) {
t.Run("unknown MAC", func(t *testing.T) {
// prepare DHCPv6 request
mac := "11:22:33:44:55:66"
claddr, _ := net.ParseMAC(mac)
req, err := dhcpv6.NewSolicit(claddr)
require.NoError(t, err)
resp, err := dhcpv6.NewAdvertiseFromSolicit(req)
require.NoError(t, err)
assert.Equal(t, 0, len(resp.GetOption(dhcpv6.OptionIANA)))
// if we handle this DHCP request, nothing should change since the lease is
// unknown
result, stop := Handler6(req, resp)
assert.False(t, stop)
assert.Equal(t, 0, len(result.GetOption(dhcpv6.OptionIANA)))
})
t.Run("known MAC", func(t *testing.T) {
// prepare DHCPv6 request
mac := "11:22:33:44:55:66"
claddr, _ := net.ParseMAC(mac)
req, err := dhcpv6.NewSolicit(claddr)
require.NoError(t, err)
resp, err := dhcpv6.NewAdvertiseFromSolicit(req)
require.NoError(t, err)
assert.Equal(t, 0, len(resp.GetOption(dhcpv6.OptionIANA)))
// add lease for the MAC in the lease map
clIPAddr := net.ParseIP("2001:db8::10:1")
StaticRecords = map[string]net.IP{
mac: clIPAddr,
}
// if we handle this DHCP request, there should be a specific IANA option
// set in the resulting response
result, stop := Handler6(req, resp)
assert.False(t, stop)
if assert.Equal(t, 1, len(result.GetOption(dhcpv6.OptionIANA))) {
opt := result.GetOneOption(dhcpv6.OptionIANA)
assert.Contains(t, opt.String(), "IP=2001:db8::10:1")
}
// cleanup
StaticRecords = make(map[string]net.IP)
})
}
func TestSetupFile(t *testing.T) {
// too few arguments
_, _, err := setupFile(false)
assert.Error(t, err)
// empty file name
_, _, err = setupFile(false, "")
assert.Error(t, err)
// trigger error in LoadDHCPv*Records
_, _, err = setupFile(false, "/foo/bar")
assert.Error(t, err)
_, _, err = setupFile(true, "/foo/bar")
assert.Error(t, err)
// setup temp leases file
tmp, err := os.CreateTemp("", "test_plugin_file")
require.NoError(t, err)
defer func() {
tmp.Close()
os.Remove(tmp.Name())
}()
t.Run("typical case", func(t *testing.T) {
_, err = tmp.WriteString("00:11:22:33:44:55 2001:db8::10:1\n")
require.NoError(t, err)
_, err = tmp.WriteString("11:22:33:44:55:66 2001:db8::10:2\n")
require.NoError(t, err)
assert.Equal(t, 0, len(StaticRecords))
// leases should show up in StaticRecords
_, _, err = setupFile(true, tmp.Name())
if assert.NoError(t, err) {
assert.Equal(t, 2, len(StaticRecords))
}
})
t.Run("autorefresh enabled", func(t *testing.T) {
_, _, err = setupFile(true, tmp.Name(), autoRefreshArg)
if assert.NoError(t, err) {
assert.Equal(t, 2, len(StaticRecords))
}
// we add more leases to the file
// this should trigger an event to refresh the leases database
// without calling setupFile again
_, err = tmp.WriteString("22:33:44:55:66:77 2001:db8::10:3\n")
require.NoError(t, err)
// since the event is processed asynchronously, give it a little time
time.Sleep(time.Millisecond * 100)
// an additional record should show up in the database
// but we should respect the locking first
recLock.RLock()
defer recLock.RUnlock()
assert.Equal(t, 3, len(StaticRecords))
})
}
|
