Function guestTunnel

e2e/src/vm/desktop.ts:104–136

(ip: string, guestPort: number)

/** SSH local-forward host:localPort → guest:guestPort; resolves once it binds. */
export const guestTunnel = async (ip: string, guestPort: number): Promise<Forward> => {
  const localPort = await freePort();
  const child = spawn(
    SSHPASS,
    [
      "-p",
      GUEST_PASS,
      "ssh",
      ...SSH_OPTS,
      "-N",
      "-L",
      `${localPort}:127.0.0.1:${guestPort}`,
      `${GUEST_USER}@${ip}`,
    ],
    { stdio: "ignore" },
  );
  for (let i = 0; i < 40; i++) {
    const ok = await new Promise<boolean>((resolve) => {
      const sock = net.connect({ host: "127.0.0.1", port: localPort }, () => {
        sock.destroy();
        resolve(true);
      });
      sock.on("error", () => resolve(false));
      sock.setTimeout(1000, () => {
        sock.destroy();
        resolve(false);
      });
    });
    if (ok) break;
    await sleep(500);
  }
  return { localPort, close: () => child.kill() };
};

const guestFileSize = (ip: string, remote: string): Promise<number> =>
  guestSsh(ip, `stat -f%z ${remote} 2>/dev/null || stat -c%s ${remote} 2>/dev/null || echo 0`)