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net/interface: add AWS App Runner /proc/net/route test

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Signed-off-by: Denton Gentry <dgentry@tailscale.com>
This commit is contained in:
Denton Gentry 2021-06-23 17:13:04 -07:00 committed by Denton Gentry
parent 98ad7f279c
commit 61622b18fa
1 changed files with 26 additions and 0 deletions
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26
net/interfaces/interfaces_linux_test.go
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@ -73,6 +73,32 @@ func TestExtremelyLongProcNetRoute(t *testing.T) {
}
}
// test the specific /proc/net/route path as found on AWS App Runner instances
func TestAwsAppRunnerDefaultRouteInterface(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\t00000000\tF9AFFEA9\t0003\t0\t0\t0\t00000000\t0\t0\t0\n" +
"*\tFEA9FEA9\t00000000\t0005\t0\t0\t0\tFFFFFFFF\t0\t0\t0\n" +
"ecs-eth0\t02AAFEA9\t01ACFEA9\t0007\t0\t0\t0\tFFFFFFFF\t0\t0\t0\n" +
"ecs-eth0\t00ACFEA9\t00000000\t0001\t0\t0\t0\t00FFFFFF\t0\t0\t0\n" +
"eth0\t00AFFEA9\t00000000\t0001\t0\t0\t0\t00FFFFFF\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 != "eth0" {
t.Fatalf("got %s, want eth0", got)
}
}
func BenchmarkDefaultRouteInterface(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {