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79 lines
2.4 KiB
C++
79 lines
2.4 KiB
C++
/* -*- Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 8 -*- */
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/* vim: set sw=4 ts=8 et tw=80 ft=cpp : */
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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 protocol PBrowser;
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include "mozilla/layout/RenderFrameUtils.h";
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using mozilla::layout::ScrollingBehavior;
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namespace mozilla {
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namespace dom {
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// An IPCTabContext which corresponds to a PBrowser opened by a child when it
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// receives window.open().
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//
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// If isBrowserElement is false, this PopupIPCTabContext corresponds to an app
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// frame, and the frame's app-id and app-frame-owner-app-id will be equal to the
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// opener's values.
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//
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// If isBrowserElement is true, the frame's browserFrameOwnerAppId will be equal
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// to the opener's app-id.
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//
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// It's an error to set isBrowserElement == false if opener is a browser
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// element. Such a PopupIPCTabContext should be rejected by code which receives
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// it.
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struct PopupIPCTabContext
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{
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PBrowser opener;
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bool isBrowserElement;
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};
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// An IPCTabContext which corresponds to an app frame.
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struct AppFrameIPCTabContext
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{
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// The ID of the app this frame corresponds to. May be NO_APP_ID.
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uint32_t ownAppId;
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// The ID of the app containing this frame. May be NO_APP_ID.
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uint32_t appFrameOwnerAppId;
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};
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// An IPCTabContext which corresponds to a browser frame.
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struct BrowserFrameIPCTabContext
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{
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// The ID of the app which contains this browser frame. May be NO_APP_ID.
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uint32_t browserFrameOwnerAppId;
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};
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// This is equivalent to AppFrameIPCTabContext with all fields set to NO_APP_ID.
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struct VanillaFrameIPCTabContext
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{};
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// IPCTabContext is an analog to mozilla::dom::TabContext. Both specify an
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// iframe/PBrowser's own and containing app-ids and tell you whether the
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// iframe/PBrowser is a browser frame. But only IPCTabContext is allowed to
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// travel over IPC.
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//
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// We need IPCTabContext (specifically, PopupIPCTabContext) to prevent a
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// privilege escalation attack by a compromised child process. See the comment
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// on AllocPBrowser for details.
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union IPCTabAppBrowserContext
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{
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PopupIPCTabContext;
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AppFrameIPCTabContext;
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BrowserFrameIPCTabContext;
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VanillaFrameIPCTabContext;
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};
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struct IPCTabContext {
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IPCTabAppBrowserContext appBrowserContext;
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ScrollingBehavior scrollingBehavior;
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};
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}
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}
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