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net/{interfaces,netns}: change which build tag means mac/ios Network/System Extension

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We used to use "redo" for that, but it was pretty vague.

Also, fix the build tags broken in interfaces_default_route_test.go from
a9745a0b68, moving those Linux-specific
tests to interfaces_linux_test.go.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2021-06-03 08:18:59 -07:00
parent 0a655309c6
commit 713c5c9ab1
5 changed files with 72 additions and 70 deletions
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67
net/interfaces/interfaces_default_route_test.go
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@ -2,15 +2,11 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build linux,!redo
// +build linux darwin,!ts_macext
package interfaces
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"testing"
)
@ -23,64 +19,3 @@ func TestDefaultRouteInterface(t *testing.T) {
}
t.Logf("got %q", v)
}
// test the specific /proc/net/route path as found on Google Cloud Run instances
func TestGoogleCloudRunDefaultRouteInterface(t *testing.T) {
dir := t.TempDir()
savedProcNetRoutePath := procNetRoutePath
defer func() { procNetRoutePath = savedProcNetRoutePath }()
procNetRoutePath = filepath.Join(dir, "CloudRun")
buf := []byte("Iface\tDestination\tGateway\tFlags\tRefCnt\tUse\tMetric\tMask\tMTU\tWindow\tIRTT\n" +
"eth0\t8008FEA9\t00000000\t0001\t0\t0\t0\t01FFFFFF\t0\t0\t0\n" +
"eth1\t00000000\t00000000\t0001\t0\t0\t0\t00000000\t0\t0\t0\n")
err := ioutil.WriteFile(procNetRoutePath, buf, 0644)
if err != nil {
t.Fatal(err)
}
got, err := DefaultRouteInterface()
if err != nil {
t.Fatal(err)
}
if got != "eth1" {
t.Fatalf("got %s, want eth1", got)
}
}
// we read chunks of /proc/net/route at a time, test that files longer than the chunk
// size can be handled.
func TestExtremelyLongProcNetRoute(t *testing.T) {
dir := t.TempDir()
savedProcNetRoutePath := procNetRoutePath
defer func() { procNetRoutePath = savedProcNetRoutePath }()
procNetRoutePath = filepath.Join(dir, "VeryLong")
f, err := os.Create(procNetRoutePath)
if err != nil {
t.Fatal(err)
}
_, err = f.Write([]byte("Iface\tDestination\tGateway\tFlags\tRefCnt\tUse\tMetric\tMask\tMTU\tWindow\tIRTT\n"))
if err != nil {
t.Fatal(err)
}
for n := 0; n <= 1000; n++ {
line := fmt.Sprintf("eth%d\t8008FEA9\t00000000\t0001\t0\t0\t0\t01FFFFFF\t0\t0\t0\n", n)
_, err := f.Write([]byte(line))
if err != nil {
t.Fatal(err)
}
}
_, err = f.Write([]byte("tokenring1\t00000000\t00000000\t0001\t0\t0\t0\t00000000\t0\t0\t0\n"))
if err != nil {
t.Fatal(err)
}
got, err := DefaultRouteInterface()
if err != nil {
t.Fatal(err)
}
if got != "tokenring1" {
t.Fatalf("got %q, want tokenring1", got)
}
}