gecko-dev/dom/ipc/nsIContentParent.cpp

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C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
#include "nsIContentParent.h"
#include "mozilla/Preferences.h"
#include "mozilla/dom/File.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/dom/ContentBridgeParent.h"
#include "mozilla/dom/ContentProcessManager.h"
#include "mozilla/dom/PTabContext.h"
#include "mozilla/dom/PermissionMessageUtils.h"
#include "mozilla/dom/ProcessMessageManager.h"
#include "mozilla/dom/TabParent.h"
#include "mozilla/dom/ipc/IPCBlobInputStreamParent.h"
#include "mozilla/dom/ipc/StructuredCloneData.h"
#include "mozilla/jsipc/CrossProcessObjectWrappers.h"
#include "mozilla/ipc/FileDescriptorSetParent.h"
#include "mozilla/ipc/PFileDescriptorSetParent.h"
#include "mozilla/ipc/IPCStreamAlloc.h"
#include "mozilla/ipc/IPCStreamDestination.h"
#include "mozilla/ipc/IPCStreamSource.h"
#include "mozilla/Unused.h"
#include "nsIWebBrowserChrome.h"
#include "nsPrintfCString.h"
#include "xpcpublic.h"
using namespace mozilla::jsipc;
// XXX need another bug to move this to a common header.
#ifdef DISABLE_ASSERTS_FOR_FUZZING
#define ASSERT_UNLESS_FUZZING(...) do { } while (0)
#else
#define ASSERT_UNLESS_FUZZING(...) MOZ_ASSERT(false, __VA_ARGS__)
#endif
namespace mozilla {
namespace dom {
nsIContentParent::nsIContentParent()
{
mMessageManager = nsFrameMessageManager::NewProcessMessageManager(true);
}
ContentParent*
nsIContentParent::AsContentParent()
{
MOZ_ASSERT(IsContentParent());
return static_cast<ContentParent*>(this);
}
ContentBridgeParent*
nsIContentParent::AsContentBridgeParent()
{
MOZ_ASSERT(IsContentBridgeParent());
return static_cast<ContentBridgeParent*>(this);
}
PJavaScriptParent*
nsIContentParent::AllocPJavaScriptParent()
{
return NewJavaScriptParent();
}
bool
nsIContentParent::DeallocPJavaScriptParent(PJavaScriptParent* aParent)
{
ReleaseJavaScriptParent(aParent);
return true;
}
bool
nsIContentParent::CanOpenBrowser(const IPCTabContext& aContext)
{
// (PopupIPCTabContext lets the child process prove that it has access to
// the app it's trying to open.)
// On e10s we also allow UnsafeTabContext to allow service workers to open
// windows. This is enforced in MaybeInvalidTabContext.
if (aContext.type() != IPCTabContext::TPopupIPCTabContext &&
aContext.type() != IPCTabContext::TUnsafeIPCTabContext) {
ASSERT_UNLESS_FUZZING("Unexpected IPCTabContext type. Aborting AllocPBrowserParent.");
return false;
}
if (aContext.type() == IPCTabContext::TPopupIPCTabContext) {
const PopupIPCTabContext& popupContext = aContext.get_PopupIPCTabContext();
if (popupContext.opener().type() != PBrowserOrId::TPBrowserParent) {
ASSERT_UNLESS_FUZZING("Unexpected PopupIPCTabContext type. Aborting AllocPBrowserParent.");
return false;
}
auto opener = TabParent::GetFrom(popupContext.opener().get_PBrowserParent());
if (!opener) {
ASSERT_UNLESS_FUZZING("Got null opener from child; aborting AllocPBrowserParent.");
return false;
}
// Popup windows of isMozBrowserElement frames must be isMozBrowserElement if
// the parent isMozBrowserElement. Allocating a !isMozBrowserElement frame with
// same app ID would allow the content to access data it's not supposed to.
if (!popupContext.isMozBrowserElement() && opener->IsMozBrowserElement()) {
ASSERT_UNLESS_FUZZING("Child trying to escalate privileges! Aborting AllocPBrowserParent.");
return false;
}
}
MaybeInvalidTabContext tc(aContext);
if (!tc.IsValid()) {
NS_ERROR(nsPrintfCString("Child passed us an invalid TabContext. (%s) "
"Aborting AllocPBrowserParent.",
tc.GetInvalidReason()).get());
return false;
}
return true;
}
PBrowserParent*
nsIContentParent::AllocPBrowserParent(const TabId& aTabId,
const TabId& aSameTabGroupAs,
const IPCTabContext& aContext,
const uint32_t& aChromeFlags,
const ContentParentId& aCpId,
const bool& aIsForBrowser)
{
MOZ_ASSERT(!aSameTabGroupAs);
Unused << aCpId;
Unused << aIsForBrowser;
if (!CanOpenBrowser(aContext)) {
return nullptr;
}
uint32_t chromeFlags = aChromeFlags;
TabId openerTabId(0);
ContentParentId openerCpId(0);
if (aContext.type() == IPCTabContext::TPopupIPCTabContext) {
// CanOpenBrowser has ensured that the IPCTabContext is of
// type PopupIPCTabContext, and that the opener TabParent is
// reachable.
const PopupIPCTabContext& popupContext = aContext.get_PopupIPCTabContext();
auto opener = TabParent::GetFrom(popupContext.opener().get_PBrowserParent());
openerTabId = opener->GetTabId();
openerCpId = opener->Manager()->ChildID();
// We must ensure that the private browsing and remoteness flags
// match those of the opener.
nsCOMPtr<nsILoadContext> loadContext = opener->GetLoadContext();
if (!loadContext) {
return nullptr;
}
bool isPrivate;
loadContext->GetUsePrivateBrowsing(&isPrivate);
if (isPrivate) {
chromeFlags |= nsIWebBrowserChrome::CHROME_PRIVATE_WINDOW;
}
}
if (openerTabId > 0 ||
aContext.type() == IPCTabContext::TUnsafeIPCTabContext) {
// Creation of PBrowser triggered from grandchild process is currently
// broken and not supported (i.e. this code path doesn't work in
// ContentBridgeParent).
//
// If you're working on fixing the code path for ContentBridgeParent,
// remember to handle the remote frame registration below carefully as it
// has to be registered in parent process.
MOZ_ASSERT(XRE_IsParentProcess());
if (!XRE_IsParentProcess()) {
return nullptr;
}
// The creation of PBrowser was triggered from content process through
// either window.open() or service worker's openWindow().
// We need to register remote frame with the child generated tab id.
ContentProcessManager* cpm = ContentProcessManager::GetSingleton();
if (!cpm->RegisterRemoteFrame(aTabId, openerCpId, openerTabId, aContext, aCpId)) {
return nullptr;
}
}
// And because we're allocating a remote browser, of course the
// window is remote.
chromeFlags |= nsIWebBrowserChrome::CHROME_REMOTE_WINDOW;
MaybeInvalidTabContext tc(aContext);
MOZ_ASSERT(tc.IsValid());
TabParent* parent = new TabParent(this, aTabId, tc.GetTabContext(), chromeFlags);
// We release this ref in DeallocPBrowserParent()
NS_ADDREF(parent);
return parent;
}
bool
nsIContentParent::DeallocPBrowserParent(PBrowserParent* aFrame)
{
TabParent* parent = TabParent::GetFrom(aFrame);
NS_RELEASE(parent);
return true;
}
mozilla::ipc::IPCResult
nsIContentParent::RecvPBrowserConstructor(PBrowserParent* actor,
const TabId& tabId,
const TabId& sameTabGroupAs,
const IPCTabContext& context,
const uint32_t& chromeFlags,
const ContentParentId& cpId,
const bool& isForBrowser)
{
TabParent* parent = TabParent::GetFrom(actor);
// When enabling input event prioritization, input events may preempt other
// normal priority IPC messages. To prevent the input events preempt
// PBrowserConstructor, we use an IPC 'RemoteIsReadyToHandleInputEvents' to
// notify parent that TabChild is created. In this case, PBrowser is initiated
// from content so that we can set TabParent as ready to handle input events.
parent->SetReadyToHandleInputEvents();
return IPC_OK();
}
PIPCBlobInputStreamParent*
nsIContentParent::AllocPIPCBlobInputStreamParent(const nsID& aID,
const uint64_t& aSize)
{
MOZ_CRASH("PIPCBlobInputStreamParent actors should be manually constructed!");
return nullptr;
}
bool
nsIContentParent::DeallocPIPCBlobInputStreamParent(PIPCBlobInputStreamParent* aActor)
{
RefPtr<IPCBlobInputStreamParent> actor =
dont_AddRef(static_cast<IPCBlobInputStreamParent*>(aActor));
return true;
}
mozilla::ipc::IPCResult
nsIContentParent::RecvSyncMessage(const nsString& aMsg,
const ClonedMessageData& aData,
InfallibleTArray<CpowEntry>&& aCpows,
const IPC::Principal& aPrincipal,
nsTArray<ipc::StructuredCloneData>* aRetvals)
{
AUTO_PROFILER_LABEL_DYNAMIC_LOSSY_NSSTRING(
"nsIContentParent::RecvSyncMessage", OTHER, aMsg);
CrossProcessCpowHolder cpows(this, aCpows);
RefPtr<nsFrameMessageManager> ppm = mMessageManager;
if (ppm) {
ipc::StructuredCloneData data;
ipc::UnpackClonedMessageDataForParent(aData, data);
ppm->ReceiveMessage(ppm, nullptr, aMsg, true, &data, &cpows, aPrincipal, aRetvals,
IgnoreErrors());
}
return IPC_OK();
}
mozilla::ipc::IPCResult
nsIContentParent::RecvRpcMessage(const nsString& aMsg,
const ClonedMessageData& aData,
InfallibleTArray<CpowEntry>&& aCpows,
const IPC::Principal& aPrincipal,
nsTArray<ipc::StructuredCloneData>* aRetvals)
{
AUTO_PROFILER_LABEL_DYNAMIC_LOSSY_NSSTRING(
"nsIContentParent::RecvRpcMessage", OTHER, aMsg);
CrossProcessCpowHolder cpows(this, aCpows);
RefPtr<nsFrameMessageManager> ppm = mMessageManager;
if (ppm) {
ipc::StructuredCloneData data;
ipc::UnpackClonedMessageDataForParent(aData, data);
ppm->ReceiveMessage(ppm, nullptr, aMsg, true, &data, &cpows, aPrincipal, aRetvals,
IgnoreErrors());
}
return IPC_OK();
}
PFileDescriptorSetParent*
nsIContentParent::AllocPFileDescriptorSetParent(const FileDescriptor& aFD)
{
return new FileDescriptorSetParent(aFD);
}
bool
nsIContentParent::DeallocPFileDescriptorSetParent(PFileDescriptorSetParent* aActor)
{
delete static_cast<FileDescriptorSetParent*>(aActor);
return true;
}
PChildToParentStreamParent*
nsIContentParent::AllocPChildToParentStreamParent()
{
return mozilla::ipc::AllocPChildToParentStreamParent();
}
bool
nsIContentParent::DeallocPChildToParentStreamParent(PChildToParentStreamParent* aActor)
{
delete aActor;
return true;
}
PParentToChildStreamParent*
nsIContentParent::AllocPParentToChildStreamParent()
{
MOZ_CRASH("PParentToChildStreamChild actors should be manually constructed!");
}
bool
nsIContentParent::DeallocPParentToChildStreamParent(PParentToChildStreamParent* aActor)
{
delete aActor;
return true;
}
mozilla::ipc::IPCResult
nsIContentParent::RecvAsyncMessage(const nsString& aMsg,
InfallibleTArray<CpowEntry>&& aCpows,
const IPC::Principal& aPrincipal,
const ClonedMessageData& aData)
{
AUTO_PROFILER_LABEL_DYNAMIC_LOSSY_NSSTRING(
"nsIContentParent::RecvAsyncMessage", OTHER, aMsg);
CrossProcessCpowHolder cpows(this, aCpows);
RefPtr<nsFrameMessageManager> ppm = mMessageManager;
if (ppm) {
ipc::StructuredCloneData data;
ipc::UnpackClonedMessageDataForParent(aData, data);
ppm->ReceiveMessage(ppm, nullptr, aMsg, false, &data, &cpows, aPrincipal, nullptr,
IgnoreErrors());
}
return IPC_OK();
}
} // namespace dom
} // namespace mozilla