mirror of
https://github.com/AdguardTeam/AdGuardHome.git
synced 2024-11-28 18:08:51 +03:00
862 lines
22 KiB
Go
862 lines
22 KiB
Go
//go:build darwin || freebsd || linux || openbsd
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package dhcpd
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import (
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"fmt"
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"net"
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"net/netip"
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"strings"
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"testing"
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"time"
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"github.com/AdguardTeam/AdGuardHome/internal/aghnet"
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"github.com/AdguardTeam/golibs/netutil"
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"github.com/AdguardTeam/golibs/stringutil"
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"github.com/AdguardTeam/golibs/testutil"
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"github.com/insomniacslk/dhcp/dhcpv4"
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"github.com/mdlayher/packet"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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var (
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DefaultRangeStart = netip.MustParseAddr("192.168.10.100")
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DefaultRangeEnd = netip.MustParseAddr("192.168.10.200")
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DefaultGatewayIP = netip.MustParseAddr("192.168.10.1")
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DefaultSelfIP = netip.MustParseAddr("192.168.10.2")
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DefaultSubnetMask = netip.MustParseAddr("255.255.255.0")
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)
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// defaultV4ServerConf returns the default configuration for *v4Server to use in
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// tests.
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func defaultV4ServerConf() (conf *V4ServerConf) {
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return &V4ServerConf{
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Enabled: true,
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RangeStart: DefaultRangeStart,
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RangeEnd: DefaultRangeEnd,
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GatewayIP: DefaultGatewayIP,
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SubnetMask: DefaultSubnetMask,
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notify: testNotify,
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dnsIPAddrs: []netip.Addr{DefaultSelfIP},
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}
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}
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// defaultSrv prepares the default DHCPServer to use in tests. The underlying
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// type of s is *v4Server.
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func defaultSrv(t *testing.T) (s DHCPServer) {
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t.Helper()
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var err error
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s, err = v4Create(defaultV4ServerConf())
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require.NoError(t, err)
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return s
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}
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func TestV4Server_leasing(t *testing.T) {
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const (
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staticName = "static-client"
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anotherName = "another-client"
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)
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staticIP := net.IP{192, 168, 10, 10}
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anotherIP := DefaultRangeStart
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staticMAC := net.HardwareAddr{0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA}
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anotherMAC := net.HardwareAddr{0xBB, 0xBB, 0xBB, 0xBB, 0xBB, 0xBB}
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s := defaultSrv(t)
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t.Run("add_static", func(t *testing.T) {
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err := s.AddStaticLease(&Lease{
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Expiry: time.Unix(leaseExpireStatic, 0),
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Hostname: staticName,
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HWAddr: staticMAC,
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IP: staticIP,
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})
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require.NoError(t, err)
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t.Run("same_name", func(t *testing.T) {
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err = s.AddStaticLease(&Lease{
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Expiry: time.Unix(leaseExpireStatic, 0),
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Hostname: staticName,
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HWAddr: anotherMAC,
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IP: anotherIP.AsSlice(),
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})
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assert.ErrorIs(t, err, ErrDupHostname)
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})
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t.Run("same_mac", func(t *testing.T) {
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wantErrMsg := "dhcpv4: adding static lease: removing " +
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"dynamic leases for " + anotherIP.String() +
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" (" + staticMAC.String() + "): static lease already exists"
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err = s.AddStaticLease(&Lease{
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Expiry: time.Unix(leaseExpireStatic, 0),
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Hostname: anotherName,
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HWAddr: staticMAC,
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IP: anotherIP.AsSlice(),
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})
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testutil.AssertErrorMsg(t, wantErrMsg, err)
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})
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t.Run("same_ip", func(t *testing.T) {
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wantErrMsg := "dhcpv4: adding static lease: removing " +
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"dynamic leases for " + staticIP.String() +
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" (" + anotherMAC.String() + "): static lease already exists"
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err = s.AddStaticLease(&Lease{
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Expiry: time.Unix(leaseExpireStatic, 0),
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Hostname: anotherName,
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HWAddr: anotherMAC,
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IP: staticIP,
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})
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testutil.AssertErrorMsg(t, wantErrMsg, err)
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})
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})
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t.Run("add_dynamic", func(t *testing.T) {
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s4, ok := s.(*v4Server)
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require.True(t, ok)
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discoverAnOffer := func(
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t *testing.T,
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name string,
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ip net.IP,
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mac net.HardwareAddr,
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) (resp *dhcpv4.DHCPv4) {
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testutil.CleanupAndRequireSuccess(t, func() (err error) {
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return s.ResetLeases(s.GetLeases(LeasesStatic))
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})
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req, err := dhcpv4.NewDiscovery(
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mac,
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dhcpv4.WithOption(dhcpv4.OptHostName(name)),
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dhcpv4.WithOption(dhcpv4.OptRequestedIPAddress(ip)),
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dhcpv4.WithOption(dhcpv4.OptClientIdentifier([]byte{1, 2, 3, 4, 5, 6, 8})),
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dhcpv4.WithGatewayIP(DefaultGatewayIP.AsSlice()),
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)
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require.NoError(t, err)
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resp = &dhcpv4.DHCPv4{}
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res := s4.handle(req, resp)
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require.Positive(t, res)
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require.Equal(t, dhcpv4.MessageTypeOffer, resp.MessageType())
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resp.ClientHWAddr = mac
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return resp
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}
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t.Run("same_name", func(t *testing.T) {
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resp := discoverAnOffer(t, staticName, anotherIP.AsSlice(), anotherMAC)
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req, err := dhcpv4.NewRequestFromOffer(resp, dhcpv4.WithOption(
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dhcpv4.OptHostName(staticName),
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))
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require.NoError(t, err)
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res := s4.handle(req, resp)
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require.Positive(t, res)
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assert.Equal(t, aghnet.GenerateHostname(resp.YourIPAddr), resp.HostName())
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})
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t.Run("same_mac", func(t *testing.T) {
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resp := discoverAnOffer(t, anotherName, anotherIP.AsSlice(), staticMAC)
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req, err := dhcpv4.NewRequestFromOffer(resp, dhcpv4.WithOption(
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dhcpv4.OptHostName(anotherName),
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))
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require.NoError(t, err)
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res := s4.handle(req, resp)
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require.Positive(t, res)
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fqdnOptData := resp.Options.Get(dhcpv4.OptionFQDN)
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require.Len(t, fqdnOptData, 3+len(staticName))
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assert.Equal(t, []uint8(staticName), fqdnOptData[3:])
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assert.Equal(t, staticIP, resp.YourIPAddr)
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})
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t.Run("same_ip", func(t *testing.T) {
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resp := discoverAnOffer(t, anotherName, staticIP, anotherMAC)
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req, err := dhcpv4.NewRequestFromOffer(resp, dhcpv4.WithOption(
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dhcpv4.OptHostName(anotherName),
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))
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require.NoError(t, err)
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res := s4.handle(req, resp)
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require.Positive(t, res)
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assert.NotEqual(t, staticIP, resp.YourIPAddr)
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})
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})
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}
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func TestV4Server_AddRemove_static(t *testing.T) {
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s := defaultSrv(t)
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ls := s.GetLeases(LeasesStatic)
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require.Empty(t, ls)
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testCases := []struct {
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lease *Lease
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name string
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wantErrMsg string
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}{{
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lease: &Lease{
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Hostname: "success.local",
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HWAddr: net.HardwareAddr{0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA},
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IP: net.IP{192, 168, 10, 150},
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},
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name: "success",
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wantErrMsg: "",
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}, {
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lease: &Lease{
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Hostname: "probably-router.local",
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HWAddr: net.HardwareAddr{0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA},
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IP: DefaultGatewayIP.AsSlice(),
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},
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name: "with_gateway_ip",
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wantErrMsg: "dhcpv4: adding static lease: " +
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"can't assign the gateway IP 192.168.10.1 to the lease",
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}, {
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lease: &Lease{
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Hostname: "ip6.local",
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HWAddr: net.HardwareAddr{0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA},
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IP: net.ParseIP("ffff::1"),
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},
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name: "ipv6",
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wantErrMsg: `dhcpv4: adding static lease: ` +
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`invalid ip "ffff::1", only ipv4 is supported`,
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}, {
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lease: &Lease{
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Hostname: "bad-mac.local",
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HWAddr: net.HardwareAddr{0xAA, 0xAA},
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IP: net.IP{192, 168, 10, 150},
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},
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name: "bad_mac",
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wantErrMsg: `dhcpv4: adding static lease: bad mac address "aa:aa": ` +
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`bad mac address length 2, allowed: [6 8 20]`,
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}, {
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lease: &Lease{
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Hostname: "bad-lbl-.local",
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HWAddr: net.HardwareAddr{0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA},
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IP: net.IP{192, 168, 10, 150},
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},
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name: "bad_hostname",
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wantErrMsg: `dhcpv4: adding static lease: validating hostname: ` +
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`bad hostname "bad-lbl-.local": ` +
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`bad hostname label "bad-lbl-": bad hostname label rune '-'`,
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}}
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for _, tc := range testCases {
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t.Run(tc.name, func(t *testing.T) {
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err := s.AddStaticLease(tc.lease)
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testutil.AssertErrorMsg(t, tc.wantErrMsg, err)
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if tc.wantErrMsg != "" {
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return
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}
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err = s.RemoveStaticLease(&Lease{
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IP: tc.lease.IP,
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HWAddr: tc.lease.HWAddr,
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})
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diffErrMsg := fmt.Sprintf("dhcpv4: lease for ip %s is different: %+v", tc.lease.IP, tc.lease)
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testutil.AssertErrorMsg(t, diffErrMsg, err)
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// Remove static lease.
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err = s.RemoveStaticLease(tc.lease)
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require.NoError(t, err)
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})
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ls = s.GetLeases(LeasesStatic)
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require.Emptyf(t, ls, "after %s", tc.name)
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}
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}
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func TestV4_AddReplace(t *testing.T) {
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sIface := defaultSrv(t)
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s, ok := sIface.(*v4Server)
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require.True(t, ok)
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dynLeases := []Lease{{
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Hostname: "dynamic-1.local",
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HWAddr: net.HardwareAddr{0x11, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA},
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IP: net.IP{192, 168, 10, 150},
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}, {
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Hostname: "dynamic-2.local",
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HWAddr: net.HardwareAddr{0x22, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA},
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IP: net.IP{192, 168, 10, 151},
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}}
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for i := range dynLeases {
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err := s.addLease(&dynLeases[i])
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require.NoError(t, err)
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}
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stLeases := []*Lease{{
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Hostname: "static-1.local",
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HWAddr: net.HardwareAddr{0x33, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA},
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IP: net.IP{192, 168, 10, 150},
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}, {
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Hostname: "static-2.local",
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HWAddr: net.HardwareAddr{0x22, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA},
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IP: net.IP{192, 168, 10, 152},
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}}
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for _, l := range stLeases {
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err := s.AddStaticLease(l)
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require.NoError(t, err)
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}
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ls := s.GetLeases(LeasesStatic)
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require.Len(t, ls, 2)
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for i, l := range ls {
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assert.True(t, stLeases[i].IP.Equal(l.IP))
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assert.Equal(t, stLeases[i].HWAddr, l.HWAddr)
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assert.True(t, l.IsStatic())
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}
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}
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func TestV4Server_handle_optionsPriority(t *testing.T) {
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defaultIP := netip.MustParseAddr("192.168.1.1")
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knownIP := net.IP{1, 2, 3, 4}
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// prepareSrv creates a *v4Server and sets the opt6IPs in the initial
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// configuration of the server as the value for DHCP option 6.
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prepareSrv := func(t *testing.T, opt6IPs []net.IP) (s *v4Server) {
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t.Helper()
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conf := defaultV4ServerConf()
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if len(opt6IPs) > 0 {
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b := &strings.Builder{}
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stringutil.WriteToBuilder(b, "6 ips ", opt6IPs[0].String())
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for _, ip := range opt6IPs[1:] {
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stringutil.WriteToBuilder(b, ",", ip.String())
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}
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conf.Options = []string{b.String()}
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} else {
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defer func() { s.implicitOpts.Update(dhcpv4.OptDNS(defaultIP.AsSlice())) }()
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}
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var err error
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s, err = v4Create(conf)
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require.NoError(t, err)
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s.conf.dnsIPAddrs = []netip.Addr{defaultIP}
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return s
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}
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// checkResp creates a discovery message with DHCP option 6 requested amd
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// asserts the response to contain wantIPs in this option.
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checkResp := func(t *testing.T, s *v4Server, wantIPs []net.IP) {
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t.Helper()
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mac := net.HardwareAddr{0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA}
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req, err := dhcpv4.NewDiscovery(mac, dhcpv4.WithRequestedOptions(
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dhcpv4.OptionDomainNameServer,
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))
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require.NoError(t, err)
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var resp *dhcpv4.DHCPv4
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resp, err = dhcpv4.NewReplyFromRequest(req)
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require.NoError(t, err)
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res := s.handle(req, resp)
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require.Equal(t, 1, res)
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o := resp.GetOneOption(dhcpv4.OptionDomainNameServer)
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require.NotEmpty(t, o)
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wantData := []byte{}
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for _, ip := range wantIPs {
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wantData = append(wantData, ip...)
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}
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assert.Equal(t, o, wantData)
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}
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t.Run("default", func(t *testing.T) {
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s := prepareSrv(t, nil)
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checkResp(t, s, []net.IP{defaultIP.AsSlice()})
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})
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t.Run("explicitly_configured", func(t *testing.T) {
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s := prepareSrv(t, []net.IP{knownIP, knownIP})
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checkResp(t, s, []net.IP{knownIP, knownIP})
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})
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}
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func TestV4Server_updateOptions(t *testing.T) {
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testIP := net.IP{1, 2, 3, 4}
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dontWant := func(c dhcpv4.OptionCode) (opt dhcpv4.Option) {
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return dhcpv4.OptGeneric(c, nil)
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}
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testCases := []struct {
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name string
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wantOpts dhcpv4.Options
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reqMods []dhcpv4.Modifier
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confOpts []string
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}{{
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name: "requested_default",
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wantOpts: dhcpv4.OptionsFromList(
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dhcpv4.OptBroadcastAddress(netutil.IPv4bcast()),
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),
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reqMods: []dhcpv4.Modifier{
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dhcpv4.WithRequestedOptions(dhcpv4.OptionBroadcastAddress),
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},
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confOpts: nil,
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}, {
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name: "requested_non-default",
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wantOpts: dhcpv4.OptionsFromList(
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dhcpv4.OptBroadcastAddress(testIP),
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),
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reqMods: []dhcpv4.Modifier{
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dhcpv4.WithRequestedOptions(dhcpv4.OptionBroadcastAddress),
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},
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confOpts: []string{
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fmt.Sprintf("%d ip %s", dhcpv4.OptionBroadcastAddress, testIP),
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},
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}, {
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name: "non-requested_default",
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wantOpts: dhcpv4.OptionsFromList(
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dontWant(dhcpv4.OptionBroadcastAddress),
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),
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reqMods: nil,
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confOpts: nil,
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}, {
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name: "non-requested_non-default",
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wantOpts: dhcpv4.OptionsFromList(
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dhcpv4.OptBroadcastAddress(testIP),
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),
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reqMods: nil,
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confOpts: []string{
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fmt.Sprintf("%d ip %s", dhcpv4.OptionBroadcastAddress, testIP),
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},
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}, {
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name: "requested_deleted",
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wantOpts: dhcpv4.OptionsFromList(
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dontWant(dhcpv4.OptionBroadcastAddress),
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),
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reqMods: []dhcpv4.Modifier{
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dhcpv4.WithRequestedOptions(dhcpv4.OptionBroadcastAddress),
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},
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confOpts: []string{
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fmt.Sprintf("%d del", dhcpv4.OptionBroadcastAddress),
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},
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}, {
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name: "requested_non-default_deleted",
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wantOpts: dhcpv4.OptionsFromList(
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dontWant(dhcpv4.OptionBroadcastAddress),
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),
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reqMods: []dhcpv4.Modifier{
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dhcpv4.WithRequestedOptions(dhcpv4.OptionBroadcastAddress),
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},
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confOpts: []string{
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fmt.Sprintf("%d ip %s", dhcpv4.OptionBroadcastAddress, testIP),
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fmt.Sprintf("%d del", dhcpv4.OptionBroadcastAddress),
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},
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}}
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for _, tc := range testCases {
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req, err := dhcpv4.New(tc.reqMods...)
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require.NoError(t, err)
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resp, err := dhcpv4.NewReplyFromRequest(req)
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require.NoError(t, err)
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conf := defaultV4ServerConf()
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conf.Options = tc.confOpts
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s, err := v4Create(conf)
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require.NoError(t, err)
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require.IsType(t, (*v4Server)(nil), s)
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t.Run(tc.name, func(t *testing.T) {
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s.updateOptions(req, resp)
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|
|
for c, v := range tc.wantOpts {
|
|
if v == nil {
|
|
assert.NotContains(t, resp.Options, c)
|
|
|
|
continue
|
|
}
|
|
|
|
assert.Equal(t, v, resp.Options.Get(dhcpv4.GenericOptionCode(c)))
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestV4StaticLease_Get(t *testing.T) {
|
|
sIface := defaultSrv(t)
|
|
|
|
s, ok := sIface.(*v4Server)
|
|
require.True(t, ok)
|
|
|
|
dnsAddr := netip.MustParseAddr("192.168.10.1")
|
|
s.conf.dnsIPAddrs = []netip.Addr{dnsAddr}
|
|
s.implicitOpts.Update(dhcpv4.OptDNS(dnsAddr.AsSlice()))
|
|
|
|
l := &Lease{
|
|
Hostname: "static-1.local",
|
|
HWAddr: net.HardwareAddr{0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA},
|
|
IP: net.IP{192, 168, 10, 150},
|
|
}
|
|
err := s.AddStaticLease(l)
|
|
require.NoError(t, err)
|
|
|
|
var req, resp *dhcpv4.DHCPv4
|
|
mac := net.HardwareAddr{0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA}
|
|
|
|
t.Run("discover", func(t *testing.T) {
|
|
req, err = dhcpv4.NewDiscovery(mac, dhcpv4.WithRequestedOptions(
|
|
dhcpv4.OptionDomainNameServer,
|
|
))
|
|
require.NoError(t, err)
|
|
|
|
resp, err = dhcpv4.NewReplyFromRequest(req)
|
|
require.NoError(t, err)
|
|
|
|
assert.Equal(t, 1, s.handle(req, resp))
|
|
})
|
|
|
|
// Don't continue if we got any errors in the previous subtest.
|
|
require.NoError(t, err)
|
|
|
|
t.Run("offer", func(t *testing.T) {
|
|
assert.Equal(t, dhcpv4.MessageTypeOffer, resp.MessageType())
|
|
assert.Equal(t, mac, resp.ClientHWAddr)
|
|
assert.True(t, l.IP.Equal(resp.YourIPAddr))
|
|
|
|
assert.True(t, resp.Router()[0].Equal(s.conf.GatewayIP.AsSlice()))
|
|
assert.True(t, resp.ServerIdentifier().Equal(s.conf.GatewayIP.AsSlice()))
|
|
|
|
ones, _ := resp.SubnetMask().Size()
|
|
assert.Equal(t, s.conf.subnet.Bits(), ones)
|
|
assert.Equal(t, s.conf.leaseTime.Seconds(), resp.IPAddressLeaseTime(-1).Seconds())
|
|
})
|
|
|
|
t.Run("request", func(t *testing.T) {
|
|
req, err = dhcpv4.NewRequestFromOffer(resp)
|
|
require.NoError(t, err)
|
|
|
|
resp, err = dhcpv4.NewReplyFromRequest(req)
|
|
require.NoError(t, err)
|
|
|
|
assert.Equal(t, 1, s.handle(req, resp))
|
|
})
|
|
|
|
require.NoError(t, err)
|
|
|
|
t.Run("ack", func(t *testing.T) {
|
|
assert.Equal(t, dhcpv4.MessageTypeAck, resp.MessageType())
|
|
assert.Equal(t, mac, resp.ClientHWAddr)
|
|
assert.True(t, l.IP.Equal(resp.YourIPAddr))
|
|
|
|
assert.True(t, resp.Router()[0].Equal(s.conf.GatewayIP.AsSlice()))
|
|
assert.True(t, resp.ServerIdentifier().Equal(s.conf.GatewayIP.AsSlice()))
|
|
|
|
ones, _ := resp.SubnetMask().Size()
|
|
assert.Equal(t, s.conf.subnet.Bits(), ones)
|
|
assert.Equal(t, s.conf.leaseTime.Seconds(), resp.IPAddressLeaseTime(-1).Seconds())
|
|
})
|
|
|
|
dnsAddrs := resp.DNS()
|
|
require.Len(t, dnsAddrs, 1)
|
|
|
|
assert.True(t, dnsAddrs[0].Equal(s.conf.GatewayIP.AsSlice()))
|
|
|
|
t.Run("check_lease", func(t *testing.T) {
|
|
ls := s.GetLeases(LeasesStatic)
|
|
require.Len(t, ls, 1)
|
|
|
|
assert.True(t, l.IP.Equal(ls[0].IP))
|
|
assert.Equal(t, mac, ls[0].HWAddr)
|
|
})
|
|
}
|
|
|
|
func TestV4DynamicLease_Get(t *testing.T) {
|
|
conf := defaultV4ServerConf()
|
|
conf.Options = []string{
|
|
"81 hex 303132",
|
|
"82 ip 1.2.3.4",
|
|
}
|
|
|
|
s, err := v4Create(conf)
|
|
require.NoError(t, err)
|
|
|
|
s.conf.dnsIPAddrs = []netip.Addr{netip.MustParseAddr("192.168.10.1")}
|
|
s.implicitOpts.Update(dhcpv4.OptDNS(s.conf.dnsIPAddrs[0].AsSlice()))
|
|
|
|
var req, resp *dhcpv4.DHCPv4
|
|
mac := net.HardwareAddr{0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA}
|
|
|
|
t.Run("discover", func(t *testing.T) {
|
|
req, err = dhcpv4.NewDiscovery(mac, dhcpv4.WithRequestedOptions(
|
|
dhcpv4.OptionFQDN,
|
|
dhcpv4.OptionRelayAgentInformation,
|
|
))
|
|
require.NoError(t, err)
|
|
|
|
resp, err = dhcpv4.NewReplyFromRequest(req)
|
|
require.NoError(t, err)
|
|
|
|
assert.Equal(t, 1, s.handle(req, resp))
|
|
})
|
|
|
|
// Don't continue if we got any errors in the previous subtest.
|
|
require.NoError(t, err)
|
|
|
|
t.Run("offer", func(t *testing.T) {
|
|
assert.Equal(t, dhcpv4.MessageTypeOffer, resp.MessageType())
|
|
assert.Equal(t, mac, resp.ClientHWAddr)
|
|
|
|
assert.True(t, resp.YourIPAddr.Equal(s.conf.RangeStart.AsSlice()))
|
|
assert.True(t, resp.ServerIdentifier().Equal(s.conf.GatewayIP.AsSlice()))
|
|
|
|
router := resp.Router()
|
|
require.Len(t, router, 1)
|
|
|
|
assert.True(t, router[0].Equal(s.conf.GatewayIP.AsSlice()))
|
|
|
|
ones, _ := resp.SubnetMask().Size()
|
|
assert.Equal(t, s.conf.subnet.Bits(), ones)
|
|
assert.Equal(t, s.conf.leaseTime.Seconds(), resp.IPAddressLeaseTime(-1).Seconds())
|
|
assert.Equal(t, []byte("012"), resp.Options.Get(dhcpv4.OptionFQDN))
|
|
|
|
rai := resp.RelayAgentInfo()
|
|
require.NotNil(t, rai)
|
|
assert.Equal(t, net.IP{1, 2, 3, 4}, net.IP(rai.ToBytes()))
|
|
})
|
|
|
|
t.Run("request", func(t *testing.T) {
|
|
req, err = dhcpv4.NewRequestFromOffer(resp)
|
|
require.NoError(t, err)
|
|
|
|
resp, err = dhcpv4.NewReplyFromRequest(req)
|
|
require.NoError(t, err)
|
|
|
|
assert.Equal(t, 1, s.handle(req, resp))
|
|
})
|
|
|
|
require.NoError(t, err)
|
|
|
|
t.Run("ack", func(t *testing.T) {
|
|
assert.Equal(t, dhcpv4.MessageTypeAck, resp.MessageType())
|
|
assert.Equal(t, mac, resp.ClientHWAddr)
|
|
assert.True(t, resp.YourIPAddr.Equal(s.conf.RangeStart.AsSlice()))
|
|
|
|
router := resp.Router()
|
|
require.Len(t, router, 1)
|
|
|
|
assert.True(t, router[0].Equal(s.conf.GatewayIP.AsSlice()))
|
|
|
|
assert.True(t, resp.ServerIdentifier().Equal(s.conf.GatewayIP.AsSlice()))
|
|
|
|
ones, _ := resp.SubnetMask().Size()
|
|
assert.Equal(t, s.conf.subnet.Bits(), ones)
|
|
assert.Equal(t, s.conf.leaseTime.Seconds(), resp.IPAddressLeaseTime(-1).Seconds())
|
|
})
|
|
|
|
dnsAddrs := resp.DNS()
|
|
require.Len(t, dnsAddrs, 1)
|
|
|
|
assert.True(t, net.IP{192, 168, 10, 1}.Equal(dnsAddrs[0]))
|
|
|
|
// check lease
|
|
t.Run("check_lease", func(t *testing.T) {
|
|
ls := s.GetLeases(LeasesDynamic)
|
|
require.Len(t, ls, 1)
|
|
|
|
assert.True(t, net.IP{192, 168, 10, 100}.Equal(ls[0].IP))
|
|
assert.Equal(t, mac, ls[0].HWAddr)
|
|
})
|
|
}
|
|
|
|
func TestNormalizeHostname(t *testing.T) {
|
|
testCases := []struct {
|
|
name string
|
|
hostname string
|
|
wantErrMsg string
|
|
want string
|
|
}{{
|
|
name: "success",
|
|
hostname: "example.com",
|
|
wantErrMsg: "",
|
|
want: "example.com",
|
|
}, {
|
|
name: "success_empty",
|
|
hostname: "",
|
|
wantErrMsg: "",
|
|
want: "",
|
|
}, {
|
|
name: "success_spaces",
|
|
hostname: "my device 01",
|
|
wantErrMsg: "",
|
|
want: "my-device-01",
|
|
}, {
|
|
name: "success_underscores",
|
|
hostname: "my_device_01",
|
|
wantErrMsg: "",
|
|
want: "my-device-01",
|
|
}, {
|
|
name: "error_part",
|
|
hostname: "device !!!",
|
|
wantErrMsg: "",
|
|
want: "device",
|
|
}, {
|
|
name: "error_part_spaces",
|
|
hostname: "device ! ! !",
|
|
wantErrMsg: "",
|
|
want: "device",
|
|
}, {
|
|
name: "error",
|
|
hostname: "!!!",
|
|
wantErrMsg: `normalizing "!!!": no valid parts`,
|
|
want: "",
|
|
}, {
|
|
name: "error_spaces",
|
|
hostname: "! ! !",
|
|
wantErrMsg: `normalizing "! ! !": no valid parts`,
|
|
want: "",
|
|
}}
|
|
|
|
for _, tc := range testCases {
|
|
t.Run(tc.name, func(t *testing.T) {
|
|
got, err := normalizeHostname(tc.hostname)
|
|
testutil.AssertErrorMsg(t, tc.wantErrMsg, err)
|
|
assert.Equal(t, tc.want, got)
|
|
})
|
|
}
|
|
}
|
|
|
|
// fakePacketConn is a mock implementation of net.PacketConn to simplify
|
|
// testing.
|
|
type fakePacketConn struct {
|
|
// writeTo is used to substitute net.PacketConn's WriteTo method.
|
|
writeTo func(p []byte, addr net.Addr) (n int, err error)
|
|
// net.PacketConn is embedded here simply to make *fakePacketConn a
|
|
// net.PacketConn without actually implementing all methods.
|
|
net.PacketConn
|
|
}
|
|
|
|
// WriteTo implements net.PacketConn interface for *fakePacketConn.
|
|
func (fc *fakePacketConn) WriteTo(p []byte, addr net.Addr) (n int, err error) {
|
|
return fc.writeTo(p, addr)
|
|
}
|
|
|
|
func TestV4Server_Send(t *testing.T) {
|
|
s := &v4Server{}
|
|
|
|
var (
|
|
defaultIP = net.IP{99, 99, 99, 99}
|
|
knownIP = net.IP{4, 2, 4, 2}
|
|
knownMAC = net.HardwareAddr{6, 5, 4, 3, 2, 1}
|
|
)
|
|
|
|
defaultPeer := &net.UDPAddr{
|
|
IP: defaultIP,
|
|
// Use neither client nor server port to check it actually
|
|
// changed.
|
|
Port: dhcpv4.ClientPort + dhcpv4.ServerPort,
|
|
}
|
|
defaultResp := &dhcpv4.DHCPv4{}
|
|
|
|
testCases := []struct {
|
|
want net.Addr
|
|
req *dhcpv4.DHCPv4
|
|
resp *dhcpv4.DHCPv4
|
|
name string
|
|
}{{
|
|
name: "giaddr",
|
|
req: &dhcpv4.DHCPv4{GatewayIPAddr: knownIP},
|
|
resp: defaultResp,
|
|
want: &net.UDPAddr{
|
|
IP: knownIP,
|
|
Port: dhcpv4.ServerPort,
|
|
},
|
|
}, {
|
|
name: "nak",
|
|
req: &dhcpv4.DHCPv4{},
|
|
resp: &dhcpv4.DHCPv4{
|
|
Options: dhcpv4.OptionsFromList(
|
|
dhcpv4.OptMessageType(dhcpv4.MessageTypeNak),
|
|
),
|
|
},
|
|
want: defaultPeer,
|
|
}, {
|
|
name: "ciaddr",
|
|
req: &dhcpv4.DHCPv4{ClientIPAddr: knownIP},
|
|
resp: &dhcpv4.DHCPv4{},
|
|
want: &net.UDPAddr{
|
|
IP: knownIP,
|
|
Port: dhcpv4.ClientPort,
|
|
},
|
|
}, {
|
|
name: "chaddr",
|
|
req: &dhcpv4.DHCPv4{ClientHWAddr: knownMAC},
|
|
resp: &dhcpv4.DHCPv4{YourIPAddr: knownIP},
|
|
want: &dhcpUnicastAddr{
|
|
Addr: packet.Addr{HardwareAddr: knownMAC},
|
|
yiaddr: knownIP,
|
|
},
|
|
}, {
|
|
name: "who_are_you",
|
|
req: &dhcpv4.DHCPv4{},
|
|
resp: &dhcpv4.DHCPv4{},
|
|
want: defaultPeer,
|
|
}}
|
|
|
|
for _, tc := range testCases {
|
|
t.Run(tc.name, func(t *testing.T) {
|
|
conn := &fakePacketConn{
|
|
writeTo: func(_ []byte, addr net.Addr) (_ int, _ error) {
|
|
assert.Equal(t, tc.want, addr)
|
|
|
|
return 0, nil
|
|
},
|
|
}
|
|
|
|
s.send(cloneUDPAddr(defaultPeer), conn, tc.req, tc.resp)
|
|
})
|
|
}
|
|
|
|
t.Run("giaddr_nak", func(t *testing.T) {
|
|
req := &dhcpv4.DHCPv4{
|
|
GatewayIPAddr: knownIP,
|
|
}
|
|
// Ensure the request is for unicast.
|
|
req.SetUnicast()
|
|
resp := &dhcpv4.DHCPv4{
|
|
Options: dhcpv4.OptionsFromList(
|
|
dhcpv4.OptMessageType(dhcpv4.MessageTypeNak),
|
|
),
|
|
}
|
|
want := &net.UDPAddr{
|
|
IP: req.GatewayIPAddr,
|
|
Port: dhcpv4.ServerPort,
|
|
}
|
|
|
|
conn := &fakePacketConn{
|
|
writeTo: func(_ []byte, addr net.Addr) (n int, err error) {
|
|
assert.Equal(t, want, addr)
|
|
|
|
return 0, nil
|
|
},
|
|
}
|
|
|
|
s.send(cloneUDPAddr(defaultPeer), conn, req, resp)
|
|
assert.True(t, resp.IsBroadcast())
|
|
})
|
|
}
|