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2d5c446209
Some misbehaving programs broadcast WM_COPYDATA messages to all and sundry. If those messages happen to be of type 0 and start with '\0', they'll look like a command from a fresh instance of Firefox to open a new window using an empty command line. Prevent this by dropping support for older versions of WinRemoteMessage, as even our current ESR emits v2 messages. Differential Revision: https://phabricator.services.mozilla.com/D186468
69 lines
2.4 KiB
C++
69 lines
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsCommandLine.h"
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#include "mozilla/CmdLineAndEnvUtils.h"
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#include "WinRemoteMessage.h"
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using namespace mozilla;
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WinRemoteMessageSender::WinRemoteMessageSender(const wchar_t* aCommandLine,
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const wchar_t* aWorkingDir)
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: mData({static_cast<DWORD>(
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WinRemoteMessageVersion::CommandLineAndWorkingDirInUtf16)}) {
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mUtf16Buffer.Append(aCommandLine);
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mUtf16Buffer.Append(u'\0');
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mUtf16Buffer.Append(aWorkingDir);
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mUtf16Buffer.Append(u'\0');
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char16_t* mutableBuffer;
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mData.cbData = mUtf16Buffer.GetMutableData(&mutableBuffer) * sizeof(char16_t);
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mData.lpData = mutableBuffer;
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}
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COPYDATASTRUCT* WinRemoteMessageSender::CopyData() { return &mData; }
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nsresult WinRemoteMessageReceiver::ParseV2(const nsAString& aBuffer) {
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CommandLineParserWin<char16_t> parser;
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size_t cch = parser.HandleCommandLine(aBuffer);
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++cch; // skip a null char
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nsCOMPtr<nsIFile> workingDir;
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if (cch < aBuffer.Length()) {
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NS_NewLocalFile(Substring(aBuffer, cch), false, getter_AddRefs(workingDir));
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}
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int argc = parser.Argc();
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Vector<nsAutoCString> utf8args;
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if (!utf8args.reserve(argc)) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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UniquePtr<const char*[]> argv(new const char*[argc]);
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for (int i = 0; i < argc; ++i) {
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utf8args.infallibleAppend(NS_ConvertUTF16toUTF8(parser.Argv()[i]));
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argv[i] = utf8args[i].get();
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}
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mCommandLine = new nsCommandLine();
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return mCommandLine->Init(argc, argv.get(), workingDir,
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nsICommandLine::STATE_REMOTE_AUTO);
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}
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nsresult WinRemoteMessageReceiver::Parse(const COPYDATASTRUCT* aMessageData) {
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switch (static_cast<WinRemoteMessageVersion>(aMessageData->dwData)) {
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case WinRemoteMessageVersion::CommandLineAndWorkingDirInUtf16:
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return ParseV2(nsDependentSubstring(
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reinterpret_cast<char16_t*>(aMessageData->lpData),
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aMessageData->cbData / sizeof(char16_t)));
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default:
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MOZ_ASSERT_UNREACHABLE("Unsupported message version");
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return NS_ERROR_FAILURE;
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}
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}
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nsICommandLineRunner* WinRemoteMessageReceiver::CommandLineRunner() {
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return mCommandLine;
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}
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