prepare-tcp-connection.js

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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

"use strict";

const { dumpn } = require("resource://devtools/shared/DevToolsUtils.js");

const {

  runCommand,

} = require("resource://devtools/client/shared/remote-debugging/adb/commands/run-command.js");

// sends adb forward deviceId, localPort and devicePort

const forwardPort = function (deviceId, localPort, devicePort) {

  dumpn("forwardPort " + localPort + " -- " + devicePort);

  // Send "host-serial:<serial-number>:<request>",

  // with <request> set to "forward:<local>;<remote>"

  // See https://android.googlesource.com/platform/system/core/+/jb-dev/adb/SERVICES.TXT

  return runCommand(

    `host-serial:${deviceId}:forward:${localPort};${devicePort}`

  ).then(function onSuccess(data) {

    return data;

});

};

const getFreeTCPPort = function () {

  const serv = Cc["@mozilla.org/network/server-socket;1"].createInstance(

    Ci.nsIServerSocket

);

  serv.init(-1, true, -1);

  const port = serv.port;

  serv.close();

  return port;

};

// Prepare TCP connection for provided device id and socket path.

// The returned value is a port number of localhost for the connection.

const prepareTCPConnection = async function (deviceId, socketPath) {

  const port = getFreeTCPPort();

  const local = `tcp:${port}`;

  const remote = socketPath.startsWith("@")

    ? `localabstract:${socketPath.substring(1)}`

    : `localfilesystem:${socketPath}`;

  await forwardPort(deviceId, local, remote);

  return port;

};

exports.prepareTCPConnection = prepareTCPConnection;