testHookUninstaller sync.Once
)

var (
	testTCPBig = flag.Bool("tcpbig", false, "whether to test massive size of data per read or write call on TCP connection")

	testDNSFlood = flag.Bool("dnsflood", false, "whether to test DNS query flooding")

	// If external IPv4 connectivity exists, we can try dialing
	// non-node/interface local scope IPv4 addresses.
	// On Windows, Lookup APIs may not return IPv4-related

		}
		if a != tt.Reverse {
			t.Errorf("#%d: expected %q, got %q (reverse address)", i, tt.Reverse, a)
		}
	}
}

func TestDNSFlood(t *testing.T) {
	if !*testDNSFlood {
		t.Skip("test disabled; use -dnsflood to enable")
	}

	defer dnsWaitGroup.Wait()

	var N = 5000
	if runtime.GOOS == "darwin" || runtime.GOOS == "ios" {
		// On Darwin this test consumes kernel threads much