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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/. */
/*
* A module to track device changes
* Adapted from adb.js at
* https://github.com/mozilla/adbhelper/tree/f44386c2d8cb7635a7d2c5a51191c89b886f8327
*/
"use strict";
const {
AdbSocket,
} = require("resource://devtools/client/shared/remote-debugging/adb/adb-socket.js");
const { dumpn } = require("resource://devtools/shared/DevToolsUtils.js");
const OKAY = 0x59414b4f;
const FAIL = 0x4c494146;
// Return buffer, which differs between Gecko versions
function getBuffer(packet) {
return packet.buffer ? packet.buffer : packet;
}
// @param aPacket The packet to get the length from.
// @param aIgnoreResponse True if this packet has no OKAY/FAIL.
// @return A js object { length:...; data:... }
function unpackPacket(packet, ignoreResponse) {
const buffer = getBuffer(packet);
dumpn("Len buffer: " + buffer.byteLength);
if (buffer.byteLength === 4 && !ignoreResponse) {
dumpn("Packet empty");
return { length: 0, data: "" };
}
const lengthView = new Uint8Array(buffer, ignoreResponse ? 0 : 4, 4);
const decoder = new TextDecoder();
const length = parseInt(decoder.decode(lengthView), 16);
const text = new Uint8Array(buffer, ignoreResponse ? 4 : 8, length);
return { length, data: decoder.decode(text) };
}
// Checks if the response is expected (defaults to OKAY).
// @return true if response equals expected.
function checkResponse(packet, expected = OKAY) {
const buffer = getBuffer(packet);
const view = new Uint32Array(buffer, 0, 1);
if (view[0] == FAIL) {
dumpn("Response: FAIL");
}
dumpn("view[0] = " + view[0]);
return view[0] == expected;
}
// @param aCommand A protocol-level command as described in
// http://androidxref.com/4.0.4/xref/system/core/adb/OVERVIEW.TXT and
// http://androidxref.com/4.0.4/xref/system/core/adb/SERVICES.TXT
// @return A 8 bit typed array.
function createRequest(command) {
let length = command.length.toString(16).toUpperCase();
while (length.length < 4) {
length = "0" + length;
}
const encoder = new TextEncoder();
dumpn("Created request: " + length + command);
return encoder.encode(length + command);
}
function connect() {
return new AdbSocket();
}
const client = {
getBuffer,
unpackPacket,
checkResponse,
createRequest,
connect,
};
module.exports = client;
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