333 lines
8.4 KiB
Go
333 lines
8.4 KiB
Go
package aghnet
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"io/fs"
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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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"github.com/AdguardTeam/golibs/errors"
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"github.com/AdguardTeam/golibs/netutil"
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"github.com/AdguardTeam/golibs/testutil"
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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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// substRootDirFS replaces the aghos.RootDirFS function used throughout the
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// package with fsys for tests ran under t.
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func substRootDirFS(t testing.TB, fsys fs.FS) {
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t.Helper()
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prev := rootDirFS
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t.Cleanup(func() { rootDirFS = prev })
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rootDirFS = fsys
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}
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// RunCmdFunc is the signature of aghos.RunCommand function.
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type RunCmdFunc func(cmd string, args ...string) (code int, out []byte, err error)
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// substShell replaces the aghos.RunCommand function used throughout the
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// package with rc for tests ran under t.
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func substShell(t testing.TB, rc RunCmdFunc) {
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t.Helper()
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prev := aghosRunCommand
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t.Cleanup(func() { aghosRunCommand = prev })
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aghosRunCommand = rc
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}
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// mapShell is a substitution of aghos.RunCommand that maps the command to it's
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// execution result. It's only needed to simplify testing.
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//
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// TODO(e.burkov): Perhaps put all the shell interactions behind an interface.
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type mapShell map[string]struct {
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err error
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out string
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code int
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}
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// theOnlyCmd returns mapShell that only handles a single command and arguments
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// combination from cmd.
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func theOnlyCmd(cmd string, code int, out string, err error) (s mapShell) {
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return mapShell{cmd: {code: code, out: out, err: err}}
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}
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// RunCmd is a RunCmdFunc handled by s.
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func (s mapShell) RunCmd(cmd string, args ...string) (code int, out []byte, err error) {
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key := strings.Join(append([]string{cmd}, args...), " ")
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ret, ok := s[key]
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if !ok {
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return 0, nil, fmt.Errorf("unexpected shell command %q", key)
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}
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return ret.code, []byte(ret.out), ret.err
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}
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// ifaceAddrsFunc is the signature of net.InterfaceAddrs function.
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type ifaceAddrsFunc func() (ifaces []net.Addr, err error)
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// substNetInterfaceAddrs replaces the the net.InterfaceAddrs function used
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// throughout the package with f for tests ran under t.
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func substNetInterfaceAddrs(t *testing.T, f ifaceAddrsFunc) {
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t.Helper()
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prev := netInterfaceAddrs
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t.Cleanup(func() { netInterfaceAddrs = prev })
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netInterfaceAddrs = f
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}
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func TestGatewayIP(t *testing.T) {
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const ifaceName = "ifaceName"
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const cmd = "ip route show dev " + ifaceName
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testCases := []struct {
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shell mapShell
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want netip.Addr
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name string
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}{{
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shell: theOnlyCmd(cmd, 0, `default via 1.2.3.4 onlink`, nil),
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want: netip.MustParseAddr("1.2.3.4"),
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name: "success_v4",
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}, {
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shell: theOnlyCmd(cmd, 0, `default via ::ffff onlink`, nil),
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want: netip.MustParseAddr("::ffff"),
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name: "success_v6",
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}, {
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shell: theOnlyCmd(cmd, 0, `non-default via 1.2.3.4 onlink`, nil),
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want: netip.Addr{},
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name: "bad_output",
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}, {
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shell: theOnlyCmd(cmd, 0, "", errors.Error("can't run command")),
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want: netip.Addr{},
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name: "err_runcmd",
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}, {
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shell: theOnlyCmd(cmd, 1, "", nil),
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want: netip.Addr{},
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name: "bad_code",
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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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substShell(t, tc.shell.RunCmd)
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assert.Equal(t, tc.want, GatewayIP(ifaceName))
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})
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}
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}
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func TestInterfaceByIP(t *testing.T) {
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ifaces, err := GetValidNetInterfacesForWeb()
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require.NoError(t, err)
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require.NotEmpty(t, ifaces)
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for _, iface := range ifaces {
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t.Run(iface.Name, func(t *testing.T) {
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require.NotEmpty(t, iface.Addresses)
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for _, ip := range iface.Addresses {
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ifaceName := InterfaceByIP(ip)
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require.Equal(t, iface.Name, ifaceName)
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}
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})
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}
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}
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func TestBroadcastFromIPNet(t *testing.T) {
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known4 := netip.MustParseAddr("192.168.0.1")
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fullBroadcast4 := netip.MustParseAddr("255.255.255.255")
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known6 := netip.MustParseAddr("102:304:506:708:90a:b0c:d0e:f10")
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testCases := []struct {
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pref netip.Prefix
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want netip.Addr
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name string
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}{{
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pref: netip.PrefixFrom(known4, 0),
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want: fullBroadcast4,
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name: "full",
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}, {
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pref: netip.PrefixFrom(known4, 20),
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want: netip.MustParseAddr("192.168.15.255"),
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name: "full",
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}, {
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pref: netip.PrefixFrom(known6, netutil.IPv6BitLen),
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want: known6,
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name: "ipv6_no_mask",
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}, {
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pref: netip.PrefixFrom(known4, netutil.IPv4BitLen),
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want: known4,
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name: "ipv4_no_mask",
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}, {
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pref: netip.PrefixFrom(netip.IPv4Unspecified(), 0),
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want: fullBroadcast4,
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name: "unspecified",
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}, {
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pref: netip.Prefix{},
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want: netip.Addr{},
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name: "invalid",
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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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assert.Equal(t, tc.want, BroadcastFromPref(tc.pref))
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})
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}
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}
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func TestCheckPort(t *testing.T) {
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laddr := netip.AddrPortFrom(netutil.IPv4Localhost(), 0)
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t.Run("tcp_bound", func(t *testing.T) {
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l, err := net.Listen("tcp", laddr.String())
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require.NoError(t, err)
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testutil.CleanupAndRequireSuccess(t, l.Close)
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ipp := testutil.RequireTypeAssert[*net.TCPAddr](t, l.Addr()).AddrPort()
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require.Equal(t, laddr.Addr(), ipp.Addr())
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require.NotZero(t, ipp.Port())
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err = CheckPort("tcp", ipp)
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target := &net.OpError{}
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require.ErrorAs(t, err, &target)
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assert.Equal(t, "listen", target.Op)
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})
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t.Run("udp_bound", func(t *testing.T) {
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conn, err := net.ListenPacket("udp", laddr.String())
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require.NoError(t, err)
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testutil.CleanupAndRequireSuccess(t, conn.Close)
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ipp := testutil.RequireTypeAssert[*net.UDPAddr](t, conn.LocalAddr()).AddrPort()
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require.Equal(t, laddr.Addr(), ipp.Addr())
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require.NotZero(t, ipp.Port())
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err = CheckPort("udp", ipp)
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target := &net.OpError{}
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require.ErrorAs(t, err, &target)
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assert.Equal(t, "listen", target.Op)
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})
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t.Run("bad_network", func(t *testing.T) {
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err := CheckPort("bad_network", netip.AddrPortFrom(netip.Addr{}, 0))
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assert.NoError(t, err)
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})
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t.Run("can_bind", func(t *testing.T) {
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err := CheckPort("udp", netip.AddrPortFrom(netip.IPv4Unspecified(), 0))
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assert.NoError(t, err)
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})
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}
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func TestCollectAllIfacesAddrs(t *testing.T) {
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testCases := []struct {
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name string
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wantErrMsg string
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addrs []net.Addr
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wantAddrs []netip.Addr
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}{{
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name: "success",
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wantErrMsg: ``,
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addrs: []net.Addr{&net.IPNet{
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IP: net.IP{1, 2, 3, 4},
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Mask: net.CIDRMask(24, netutil.IPv4BitLen),
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}, &net.IPNet{
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IP: net.IP{4, 3, 2, 1},
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Mask: net.CIDRMask(16, netutil.IPv4BitLen),
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}},
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wantAddrs: []netip.Addr{
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netip.MustParseAddr("1.2.3.4"),
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netip.MustParseAddr("4.3.2.1"),
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},
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}, {
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name: "not_cidr",
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wantErrMsg: `netip.ParsePrefix("1.2.3.4"): no '/'`,
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addrs: []net.Addr{&net.IPAddr{
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IP: net.IP{1, 2, 3, 4},
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}},
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wantAddrs: nil,
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}, {
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name: "empty",
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wantErrMsg: ``,
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addrs: []net.Addr{},
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wantAddrs: nil,
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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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substNetInterfaceAddrs(t, func() ([]net.Addr, error) { return tc.addrs, nil })
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addrs, err := CollectAllIfacesAddrs()
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testutil.AssertErrorMsg(t, tc.wantErrMsg, err)
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assert.Equal(t, tc.wantAddrs, addrs)
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})
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}
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t.Run("internal_error", func(t *testing.T) {
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const errAddrs errors.Error = "can't get addresses"
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substNetInterfaceAddrs(t, func() ([]net.Addr, error) { return nil, errAddrs })
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_, err := CollectAllIfacesAddrs()
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assert.ErrorIs(t, err, errAddrs)
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})
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}
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func TestIsAddrInUse(t *testing.T) {
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t.Run("addr_in_use", func(t *testing.T) {
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l, err := net.Listen("tcp", "0.0.0.0:0")
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require.NoError(t, err)
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testutil.CleanupAndRequireSuccess(t, l.Close)
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_, err = net.Listen(l.Addr().Network(), l.Addr().String())
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assert.True(t, IsAddrInUse(err))
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})
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t.Run("another", func(t *testing.T) {
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const anotherErr errors.Error = "not addr in use"
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assert.False(t, IsAddrInUse(anotherErr))
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})
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}
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func TestNetInterface_MarshalJSON(t *testing.T) {
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const want = `{` +
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`"hardware_address":"aa:bb:cc:dd:ee:ff",` +
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`"flags":"up|multicast",` +
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`"ip_addresses":["1.2.3.4","aaaa::1"],` +
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`"name":"iface0",` +
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`"mtu":1500` +
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`}` + "\n"
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ip4, ok := netip.AddrFromSlice([]byte{1, 2, 3, 4})
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require.True(t, ok)
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ip6, ok := netip.AddrFromSlice([]byte{0xAA, 0xAA, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1})
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require.True(t, ok)
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net4 := netip.PrefixFrom(ip4, 24)
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net6 := netip.PrefixFrom(ip6, 8)
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iface := &NetInterface{
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Addresses: []netip.Addr{ip4, ip6},
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Subnets: []netip.Prefix{net4, net6},
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Name: "iface0",
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HardwareAddr: net.HardwareAddr{0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF},
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Flags: net.FlagUp | net.FlagMulticast,
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MTU: 1500,
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}
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b := &bytes.Buffer{}
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err := json.NewEncoder(b).Encode(iface)
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require.NoError(t, err)
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assert.Equal(t, want, b.String())
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}
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