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cmd/tailscale/cli: [set] handle selectively modifying routes/exit node

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Noticed this while debugging something else, we would reset all routes if
either `--advertise-exit-node` or `--advertise-routes` were set. This handles
correctly updating them.

Also added tests.

Signed-off-by: Maisem Ali <maisem@tailscale.com>
This commit is contained in:
Maisem Ali
2022-11-12 14:53:36 +05:00
committed by Maisem Ali
parent 26d1fc867e
commit 8e85227059
7 changed files with 199 additions and 19 deletions
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cmd/tailscale/cli/set_test.go
+133
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@@ -0,0 +1,133 @@
// Copyright (c) 2022 Tailscale Inc & AUTHORS All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package cli
import (
"net/netip"
"reflect"
"testing"
"tailscale.com/ipn"
"tailscale.com/net/tsaddr"
)
func ptrTo[T any](v T) *T { return &v }
func TestCalcAdvertiseRoutesForSet(t *testing.T) {
pfx := netip.MustParsePrefix
tests := []struct {
name string
setExit *bool
setRoutes *string
was []netip.Prefix
want []netip.Prefix
}{
{
name: "empty",
},
{
name: "advertise-exit",
setExit: ptrTo(true),
want: tsaddr.ExitRoutes(),
},
{
name: "advertise-exit/already-routes",
was: []netip.Prefix{pfx("34.0.0.0/16")},
setExit: ptrTo(true),
want: []netip.Prefix{pfx("34.0.0.0/16"), tsaddr.AllIPv4(), tsaddr.AllIPv6()},
},
{
name: "advertise-exit/already-exit",
was: tsaddr.ExitRoutes(),
setExit: ptrTo(true),
want: tsaddr.ExitRoutes(),
},
{
name: "stop-advertise-exit",
was: tsaddr.ExitRoutes(),
setExit: ptrTo(false),
want: nil,
},
{
name: "stop-advertise-exit/with-routes",
was: []netip.Prefix{pfx("34.0.0.0/16"), tsaddr.AllIPv4(), tsaddr.AllIPv6()},
setExit: ptrTo(false),
want: []netip.Prefix{pfx("34.0.0.0/16")},
},
{
name: "advertise-routes",
setRoutes: ptrTo("10.0.0.0/24,192.168.0.0/16"),
want: []netip.Prefix{pfx("10.0.0.0/24"), pfx("192.168.0.0/16")},
},
{
name: "advertise-routes/already-exit",
was: tsaddr.ExitRoutes(),
setRoutes: ptrTo("10.0.0.0/24,192.168.0.0/16"),
want: []netip.Prefix{pfx("10.0.0.0/24"), pfx("192.168.0.0/16"), tsaddr.AllIPv4(), tsaddr.AllIPv6()},
},
{
name: "advertise-routes/already-diff-routes",
was: []netip.Prefix{pfx("34.0.0.0/16")},
setRoutes: ptrTo("10.0.0.0/24,192.168.0.0/16"),
want: []netip.Prefix{pfx("10.0.0.0/24"), pfx("192.168.0.0/16")},
},
{
name: "stop-advertise-routes",
was: []netip.Prefix{pfx("34.0.0.0/16")},
setRoutes: ptrTo(""),
want: nil,
},
{
name: "stop-advertise-routes/already-exit",
was: []netip.Prefix{pfx("34.0.0.0/16"), tsaddr.AllIPv4(), tsaddr.AllIPv6()},
setRoutes: ptrTo(""),
want: tsaddr.ExitRoutes(),
},
{
name: "advertise-routes-and-exit",
setExit: ptrTo(true),
setRoutes: ptrTo("10.0.0.0/24,192.168.0.0/16"),
want: []netip.Prefix{pfx("10.0.0.0/24"), pfx("192.168.0.0/16"), tsaddr.AllIPv4(), tsaddr.AllIPv6()},
},
{
name: "advertise-routes-and-exit/already-exit",
was: tsaddr.ExitRoutes(),
setExit: ptrTo(true),
setRoutes: ptrTo("10.0.0.0/24,192.168.0.0/16"),
want: []netip.Prefix{pfx("10.0.0.0/24"), pfx("192.168.0.0/16"), tsaddr.AllIPv4(), tsaddr.AllIPv6()},
},
{
name: "advertise-routes-and-exit/already-routes",
was: []netip.Prefix{pfx("10.0.0.0/24"), pfx("192.168.0.0/16")},
setExit: ptrTo(true),
setRoutes: ptrTo("10.0.0.0/24,192.168.0.0/16"),
want: []netip.Prefix{pfx("10.0.0.0/24"), pfx("192.168.0.0/16"), tsaddr.AllIPv4(), tsaddr.AllIPv6()},
},
}
for _, tc := range tests {
t.Run(tc.name, func(t *testing.T) {
curPrefs := &ipn.Prefs{
AdvertiseRoutes: tc.was,
}
sa := setArgsT{}
if tc.setExit != nil {
sa.advertiseDefaultRoute = *tc.setExit
}
if tc.setRoutes != nil {
sa.advertiseRoutes = *tc.setRoutes
}
got, err := calcAdvertiseRoutesForSet(tc.setExit != nil, tc.setRoutes != nil, curPrefs, sa)
if err != nil {
t.Fatal(err)
}
tsaddr.SortPrefixes(got)
tsaddr.SortPrefixes(tc.want)
if !reflect.DeepEqual(got, tc.want) {
t.Errorf("got %v, want %v", got, tc.want)
}
})
}
}