Function dumpcap_usable

tests/fixtures.py:91–119

()

def dumpcap_usable():
    def have_binary(name):
        return shutil.which(name) is not None

    if not have_binary("dumpcap") or not have_binary("tshark"):
        return False

    try:
        with tempfile.TemporaryDirectory() as td:
            pcap = Path(td) / "probe.pcap"

            proc = subprocess.Popen(
                [
                    "dumpcap",
                    "-i", "lo",
                    "-w", str(pcap),
                    "-f", "tcp",
                ],
                stdout=subprocess.DEVNULL,
                stderr=subprocess.DEVNULL,
            )

            time.sleep(0.2)
            proc.terminate()
            proc.wait(timeout=1)

            return pcap.exists() and pcap.stat().st_size > 0
    except (PermissionError, subprocess.SubprocessError, OSError):
        return False


class TcpCapture: