/* 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/. */
#ifndef IPC_GLUE_IPCMESSAGEUTILSSPECIALIZATIONS_H_
#define IPC_GLUE_IPCMESSAGEUTILSSPECIALIZATIONS_H_
#include <cstdint>
#include <limits>
#include <type_traits>
#include <utility>
#include "chrome/common/ipc_message.h"
#include "chrome/common/ipc_message_utils.h"
#include "ipc/EnumSerializer.h"
#include "ipc/IPCMessageUtils.h"
#include "mozilla/Assertions.h"
#include "mozilla/BitSet.h"
#include "mozilla/EnumSet.h"
#include "mozilla/EnumTypeTraits.h"
#include "mozilla/Maybe.h"
#include "mozilla/TimeStamp.h"
#include "mozilla/Vector.h"
#include "mozilla/dom/ipc/StructuredCloneData.h"
#include "mozilla/dom/UserActivation.h"
#include "gfxPlatform.h"
#include "NonCustomCSSPropertyId.h"
#include "nsContentPolicyType.h"
#include "nsContentPermissionHelper.h"
#include "nsDebug.h"
#include "nsIContentPolicy.h"
#include "nsID.h"
#include "nsILoadInfo.h"
#include "nsIThread.h"
#include "nsLiteralString.h"
#include "nsNetUtil.h"
#include "nsString.h"
#include "nsTArray.h"
#include "nsTHashSet.h"
// XXX Includes that are only required by implementations which could be moved
// to the cpp file.
#include "base/string_util.h" // for StringPrintf
#ifdef _MSC_VER
# pragma warning(disable :
4800)
#endif
namespace mozilla {
template <
typename... Ts>
class Variant;
namespace detail {
template <
typename... Ts>
struct VariantTag;
}
}
// namespace mozilla
namespace mozilla::dom {
template <
typename T>
class Optional;
}
class nsAtom;
namespace IPC {
template <
class T>
struct ParamTraits<nsTSubstring<T>> {
typedef nsTSubstring<T> paramType;
static void Write(MessageWriter* aWriter,
const paramType& aParam) {
bool isVoid = aParam.IsVoid();
aWriter->WriteBool(isVoid);
if (isVoid) {
// represents a nullptr pointer
return;
}
WriteSequenceParam<
const T&>(aWriter, aParam.BeginReading(),
aParam.Length());
}
static bool Read(MessageReader* aReader, paramType* aResult) {
bool isVoid;
if (!aReader->ReadBool(&isVoid)) {
return false;
}
if (isVoid) {
aResult->SetIsVoid(
true);
return true;
}
return ReadSequenceParam<T>(aReader, [&](uint32_t aLength) -> T* {
T* data = nullptr;
aResult->GetMutableData(&data, aLength);
return data;
});
}
};
template <
class T>
struct ParamTraits<nsTString<T>> : ParamTraits<nsTSubstring<T>> {};
template <
class T>
struct ParamTraits<nsTLiteralString<T>> : ParamTraits<nsTSubstring<T>> {};
template <
class T, size_t N>
struct ParamTraits<nsTAutoStringN<T, N>> : ParamTraits<nsTSubstring<T>> {};
template <
class T>
struct ParamTraits<nsTDependentString<T>> : ParamTraits<nsTSubstring<T>> {};
// Key type must be a type with ParamTraits, a default constructor and a move
// constructor.
template <
typename KeyClass,
typename ConstructableKeyType =
typename std::remove_const<
typename std::remove_reference<
typename KeyClass::KeyType>::type>::type>
struct ParamTraitsforHashSet {
typedef nsTBaseHashSet<KeyClass> paramType;
using KeyType =
typename KeyClass::KeyType;
static void Write(MessageWriter* aWriter,
const paramType& aParam) {
uint32_t count = aParam.Count();
WriteParam(aWriter, count);
for (
const auto& key : aParam) {
WriteParam(aWriter, key);
}
}
static bool Read(MessageReader* aReader, paramType* aResult) {
uint32_t count;
if (!ReadParam(aReader, &count)) {
return false;
}
paramType table(count);
for (uint32_t i =
0; i < count; ++i) {
ConstructableKeyType key;
if (!ReadParam(aReader, &key)) {
return false;
}
table.Insert(std::move(key));
}
*aResult = std::move(table);
return true;
}
};
template <
typename KeyClass>
struct ParamTraits<nsTBaseHashSet<KeyClass>> : ParamTraitsforHashSet<KeyClass> {
};
template <>
struct ParamTraits<nsTBaseHashSet<nsStringHashKey>>
: ParamTraitsforHashSet<nsStringHashKey, nsString> {};
template <
typename E>
struct ParamTraits<nsTArray<E>> {
typedef nsTArray<E> paramType;
static void Write(MessageWriter* aWriter,
const paramType& aParam) {
WriteSequenceParam<
const E&>(aWriter, aParam.Elements(), aParam.Length());
}
static void Write(MessageWriter* aWriter, paramType&& aParam) {
WriteSequenceParam<E&&>(aWriter, aParam.Elements(), aParam.Length());
}
static bool Read(MessageReader* aReader, paramType* aResult) {
return ReadSequenceParam<E>(aReader, [&](uint32_t aLength) {
if constexpr (std::is_trivially_default_constructible_v<E>) {
return aResult->AppendElements(aLength);
}
else {
aResult->SetCapacity(aLength);
return mozilla::Some(MakeBackInserter(*aResult));
}
});
}
};
template <
typename E>
struct ParamTraits<CopyableTArray<E>> : ParamTraits<nsTArray<E>> {};
template <
typename E>
struct ParamTraits<FallibleTArray<E>> {
typedef FallibleTArray<E> paramType;
static void Write(MessageWriter* aWriter,
const paramType& aParam) {
WriteSequenceParam<
const E&>(aWriter, aParam.Elements(), aParam.Length());
}
static void Write(MessageWriter* aWriter, paramType&& aParam) {
WriteSequenceParam<E&&>(aWriter, aParam.Elements(), aParam.Length());
}
static bool Read(MessageReader* aReader, paramType* aResult) {
return ReadSequenceParam<E>(aReader, [&](uint32_t aLength) {
if constexpr (std::is_trivially_default_constructible_v<E>) {
return aResult->AppendElements(aLength, mozilla::fallible);
}
else {
if (!aResult->SetCapacity(aLength, mozilla::fallible)) {
return mozilla::Maybe<BackInserter>{};
}
return mozilla::Some(BackInserter{.mArray = aResult});
}
});
}
private:
struct BackInserter {
using iterator_category = std::output_iterator_tag;
using value_type =
void;
using difference_type =
void;
using pointer =
void;
using reference =
void;
struct Proxy {
paramType& mArray;
template <
typename U>
void operator=(U&& aValue) {
// This won't fail because we've reserved capacity earlier.
MOZ_ALWAYS_TRUE(mArray.AppendElement(aValue, mozilla::fallible));
}
};
Proxy
operator*() {
return Proxy{.mArray = *mArray}; }
BackInserter&
operator++() {
return *
this; }
BackInserter&
operator++(
int) {
return *
this; }
paramType* mArray = nullptr;
};
};
template <
typename E, size_t N>
struct ParamTraits<AutoTArray<E, N>> : ParamTraits<nsTArray<E>> {
typedef AutoTArray<E, N> paramType;
};
template <
typename E, size_t N>
struct ParamTraits<CopyableAutoTArray<E, N>> : ParamTraits<AutoTArray<E, N>> {};
template <
typename T>
struct ParamTraits<mozilla::dom::Sequence<T>> : ParamTraits<FallibleTArray<T>> {
};
template <
typename E, size_t N,
typename AP>
struct ParamTraits<mozilla::Vector<E, N, AP>> {
typedef mozilla::Vector<E, N, AP> paramType;
static void Write(MessageWriter* aWriter,
const paramType& aParam) {
WriteSequenceParam<
const E&>(aWriter, aParam.Elements(), aParam.Length());
}
static void Write(MessageWriter* aWriter, paramType&& aParam) {
WriteSequenceParam<E&&>(aWriter, aParam.Elements(), aParam.Length());
}
static bool Read(MessageReader* aReader, paramType* aResult) {
return ReadSequenceParam<E>(aReader, [&](uint32_t aLength) -> E* {
if (!aResult->resize(aLength)) {
// So that OOM failure shows up as OOM crash instead of IPC FatalError.
NS_ABORT_OOM(aLength *
sizeof(E));
}
return aResult->begin();
});
}
};
template <>
struct ParamTraits<
float> {
typedef float paramType;
static void Write(MessageWriter* aWriter,
const paramType& aParam) {
aWriter->WriteBytes(&aParam,
sizeof(paramType));
}
static bool Read(MessageReader* aReader, paramType* aResult) {
return aReader->ReadBytesInto(aResult,
sizeof(*aResult));
}
};
template <>
struct ParamTraits<NonCustomCSSPropertyId>
:
public ContiguousEnumSerializer<
NonCustomCSSPropertyId, eCSSProperty_FIRST, eCSSProperty_INVALID> {};
template <>
struct ParamTraits<nsID> {
typedef nsID paramType;
static void Write(MessageWriter* aWriter,
const paramType& aParam) {
WriteParam(aWriter, aParam.m0);
WriteParam(aWriter, aParam.m1);
WriteParam(aWriter, aParam.m2);
for (
unsigned int i =
0; i < std::size(aParam.m3); i++) {
WriteParam(aWriter, aParam.m3[i]);
}
}
static bool Read(MessageReader* aReader, paramType* aResult) {
if (!ReadParam(aReader, &(aResult->m0)) ||
!ReadParam(aReader, &(aResult->m1)) ||
!ReadParam(aReader, &(aResult->m2)))
return false;
for (
unsigned int i =
0; i < std::size(aResult->m3); i++)
if (!ReadParam(aReader, &(aResult->m3[i])))
return false;
return true;
}
};
struct nsContentPolicyTypeValidator {
using IntegralType = std::underlying_type_t<nsContentPolicyType>;
static bool IsLegalValue(
const IntegralType e) {
switch (e) {
#define CONTENT_POLICY_TYPE(name)
case nsContentPolicyType::name:
FOR_EACH_CONTENT_POLICY_TYPE(CONTENT_POLICY_TYPE)
#undef CONTENT_POLICY_TYPE
return true;
case nsContentPolicyType::TYPE_INVALID:
// NOTE: It is intentionally valid to send TYPE_INVALID over IPC.
return true;
}
return false;
}
};
template <>
struct ParamTraits<nsContentPolicyType>
: EnumSerializer<nsContentPolicyType, nsContentPolicyTypeValidator> {};
template <>
struct ParamTraits<mozilla::TimeDuration> {
typedef mozilla::TimeDuration paramType;
static void Write(MessageWriter* aWriter,
const paramType& aParam) {
WriteParam(aWriter, aParam.mValue);
}
static bool Read(MessageReader* aReader, paramType* aResult) {
return ReadParam(aReader, &aResult->mValue);
};
};
template <>
struct ParamTraits<mozilla::TimeStamp> {
typedef mozilla::TimeStamp paramType;
static void Write(MessageWriter* aWriter,
const paramType& aParam) {
WriteParam(aWriter, aParam.mValue);
}
static bool Read(MessageReader* aReader, paramType* aResult) {
return ReadParam(aReader, &aResult->mValue);
};
};
template <
class T>
struct ParamTraits<mozilla::Maybe<T>> {
typedef mozilla::Maybe<T> paramType;
static void Write(MessageWriter* writer,
const paramType& param) {
if (param.isSome()) {
WriteParam(writer,
true);
WriteParam(writer, param.ref());
}
else {
WriteParam(writer,
false);
}
}
static void Write(MessageWriter* writer, paramType&& param) {
if (param.isSome()) {
WriteParam(writer,
true);
WriteParam(writer, std::move(param.ref()));
}
else {
WriteParam(writer,
false);
}
}
static bool Read(MessageReader* reader, paramType* result) {
bool isSome;
if (!ReadParam(reader, &isSome)) {
return false;
}
if (isSome) {
mozilla::Maybe<T> tmp = ReadParam<T>(reader).TakeMaybe();
if (!tmp) {
return false;
}
*result = std::move(tmp);
}
else {
*result = mozilla::Nothing();
}
return true;
}
};
template <
typename T,
typename U>
struct ParamTraits<mozilla::EnumSet<T, U>> {
typedef mozilla::EnumSet<T, U> paramType;
typedef U serializedType;
static void Write(MessageWriter* writer,
const paramType& param) {
MOZ_RELEASE_ASSERT(IsLegalValue(param.serialize()));
WriteParam(writer, param.serialize());
}
static bool Read(MessageReader* reader, paramType* result) {
serializedType tmp;
if (ReadParam(reader, &tmp)) {
if (IsLegalValue(tmp)) {
result->deserialize(tmp);
return true;
}
}
return false;
}
static constexpr size_t kUnderlyingWidth = [] {
if constexpr (std::numeric_limits<serializedType>::is_specialized) {
return std::numeric_limits<serializedType>::digits;
}
else {
return serializedType().size();
// for std::bitset<N>
}
}();
static constexpr serializedType AllEnumBits() {
return ~serializedType(
0) >>
(kUnderlyingWidth - (mozilla::MaxEnumValue<T>::value +
1));
}
static constexpr
bool IsLegalValue(
const serializedType value) {
static_assert(mozilla::MaxEnumValue<T>::value < kUnderlyingWidth,
"Enum max value is not in the range!");
static_assert(
std::is_unsigned<decltype(mozilla::MaxEnumValue<T>::value)>::value,
"Type of MaxEnumValue<T>::value specialization should be unsigned!");
return (value & AllEnumBits()) == value;
}
};
template <
class... Ts>
struct ParamTraits<mozilla::Variant<Ts...>> {
typedef mozilla::Variant<Ts...> paramType;
using Tag =
typename mozilla::detail::VariantTag<Ts...>::Type;
static void Write(MessageWriter* writer,
const paramType& param) {
WriteParam(writer, param.tag);
param.match([writer](
const auto& t) { WriteParam(writer, t); });
}
// Because VariantReader is a nested struct, we need the dummy template
// parameter to avoid making VariantReader<0> an explicit specialization,
// which is not allowed for a nested class template
template <size_t N,
typename dummy =
void>
struct VariantReader {
using Next = VariantReader<N -
1>;
// Since the VariantReader specializations start at N , we need to
// subtract one to look at N - 1, the first valid tag. This means our
// comparisons are off by 1. If we get to N = 0 then we have failed to
// find a match to the tag.
static constexpr size_t Idx = N -
1;
using T = mozilla::detail::Nth<Idx, Ts...>;
static ReadResult<paramType> Read(MessageReader* reader, Tag tag) {
if (tag == Idx) {
auto p = ReadParam<T>(reader);
if (p) {
return ReadResult<paramType>(
std::in_place, mozilla::VariantIndex<Idx>{}, std::move(*p));
}
return {};
}
else {
return Next::Read(reader, tag);
}
}
};
// VariantReader<N>
// Since we are conditioning on tag = N - 1 in the preceding specialization,
// if we get to `VariantReader<0, dummy>` we have failed to find
// a matching tag.
template <
typename dummy>
struct VariantReader<
0, dummy> {
static ReadResult<paramType> Read(MessageReader* reader, Tag tag) {
return {};
}
};
static ReadResult<paramType> Read(MessageReader* reader) {
Tag tag;
if (ReadParam(reader, &tag)) {
return VariantReader<
sizeof...(Ts)>::Read(reader, tag);
}
return {};
}
};
template <
typename T>
struct ParamTraits<mozilla::dom::Optional<T>> {
typedef mozilla::dom::Optional<T> paramType;
static void Write(MessageWriter* aWriter,
const paramType& aParam) {
if (aParam.WasPassed()) {
WriteParam(aWriter,
true);
WriteParam(aWriter, aParam.Value());
return;
}
WriteParam(aWriter,
false);
}
static bool Read(MessageReader* aReader, paramType* aResult) {
bool wasPassed =
false;
if (!ReadParam(aReader, &wasPassed)) {
return false;
}
aResult->Reset();
if (wasPassed) {
if (!ReadParam(aReader, &aResult->Construct())) {
return false;
}
}
return true;
}
};
template <>
struct ParamTraits<nsAtom*> {
typedef nsAtom paramType;
static void Write(MessageWriter* aWriter,
const paramType* aParam);
static bool Read(MessageReader* aReader, RefPtr<paramType>* aResult);
};
struct CrossOriginOpenerPolicyValidator {
using IntegralType =
std::underlying_type_t<nsILoadInfo::CrossOriginOpenerPolicy>;
static bool IsLegalValue(
const IntegralType e) {
return AreIntegralValuesEqual(e, nsILoadInfo::OPENER_POLICY_UNSAFE_NONE) ||
AreIntegralValuesEqual(e, nsILoadInfo::OPENER_POLICY_SAME_ORIGIN) ||
AreIntegralValuesEqual(
e, nsILoadInfo::OPENER_POLICY_SAME_ORIGIN_ALLOW_POPUPS) ||
AreIntegralValuesEqual(
e, nsILoadInfo::
OPENER_POLICY_SAME_ORIGIN_EMBEDDER_POLICY_REQUIRE_CORP);
}
private:
static bool AreIntegralValuesEqual(
const IntegralType aLhs,
const nsILoadInfo::CrossOriginOpenerPolicy aRhs) {
return aLhs ==
static_cast<IntegralType>(aRhs);
}
};
template <>
struct ParamTraits<nsILoadInfo::CrossOriginOpenerPolicy>
: EnumSerializer<nsILoadInfo::CrossOriginOpenerPolicy,
CrossOriginOpenerPolicyValidator> {};
struct CrossOriginEmbedderPolicyValidator {
using IntegralType =
std::underlying_type_t<nsILoadInfo::CrossOriginEmbedderPolicy>;
static bool IsLegalValue(
const IntegralType e) {
return AreIntegralValuesEqual(e, nsILoadInfo::EMBEDDER_POLICY_NULL) ||
AreIntegralValuesEqual(e,
nsILoadInfo::EMBEDDER_POLICY_REQUIRE_CORP) ||
AreIntegralValuesEqual(e,
nsILoadInfo::EMBEDDER_POLICY_CREDENTIALLESS);
}
private:
static bool AreIntegralValuesEqual(
const IntegralType aLhs,
const nsILoadInfo::CrossOriginEmbedderPolicy aRhs) {
return aLhs ==
static_cast<IntegralType>(aRhs);
}
};
template <>
struct ParamTraits<nsILoadInfo::CrossOriginEmbedderPolicy>
: EnumSerializer<nsILoadInfo::CrossOriginEmbedderPolicy,
CrossOriginEmbedderPolicyValidator> {};
template <>
struct ParamTraits<nsIThread::QoSPriority>
:
public ContiguousEnumSerializerInclusive<nsIThread::QoSPriority,
nsIThread::QOS_PRIORITY_NORMAL,
nsIThread::QOS_PRIORITY_LOW> {};
template <size_t N,
typename Word>
struct ParamTraits<mozilla::BitSet<N, Word>> {
typedef mozilla::BitSet<N, Word> paramType;
static void Write(MessageWriter* aWriter,
const paramType& aParam) {
for (Word word : aParam.Storage()) {
WriteParam(aWriter, word);
}
}
static bool Read(MessageReader* aReader, paramType* aResult) {
for (Word& word : aResult->Storage()) {
if (!ReadParam(aReader, &word)) {
return false;
}
}
return true;
}
};
template <>
struct ParamTraits<mozilla::net::LinkHeader> {
typedef mozilla::net::LinkHeader paramType;
constexpr
static int kNumberOfMembers =
14;
constexpr
static int kSizeOfEachMember =
sizeof(nsString);
constexpr
static int kExpectedSizeOfParamType =
kNumberOfMembers * kSizeOfEachMember;
static void Write(MessageWriter* aWriter,
const paramType& aParam) {
static_assert(
sizeof(paramType) == kExpectedSizeOfParamType,
"All members of should be written below.");
WriteParam(aWriter, aParam.mHref);
WriteParam(aWriter, aParam.mRel);
WriteParam(aWriter, aParam.mTitle);
WriteParam(aWriter, aParam.mNonce);
WriteParam(aWriter, aParam.mIntegrity);
WriteParam(aWriter, aParam.mSrcset);
WriteParam(aWriter, aParam.mSizes);
WriteParam(aWriter, aParam.mType);
WriteParam(aWriter, aParam.mMedia);
WriteParam(aWriter, aParam.mAnchor);
WriteParam(aWriter, aParam.mCrossOrigin);
WriteParam(aWriter, aParam.mReferrerPolicy);
WriteParam(aWriter, aParam.mAs);
WriteParam(aWriter, aParam.mFetchPriority);
}
static bool Read(MessageReader* aReader, paramType* aResult) {
static_assert(
sizeof(paramType) == kExpectedSizeOfParamType,
"All members of should be handled below.");
if (!ReadParam(aReader, &aResult->mHref)) {
return false;
}
if (!ReadParam(aReader, &aResult->mRel)) {
return false;
}
if (!ReadParam(aReader, &aResult->mTitle)) {
return false;
}
if (!ReadParam(aReader, &aResult->mNonce)) {
return false;
}
if (!ReadParam(aReader, &aResult->mIntegrity)) {
return false;
}
if (!ReadParam(aReader, &aResult->mSrcset)) {
return false;
}
if (!ReadParam(aReader, &aResult->mSizes)) {
return false;
}
if (!ReadParam(aReader, &aResult->mType)) {
return false;
}
if (!ReadParam(aReader, &aResult->mMedia)) {
return false;
}
if (!ReadParam(aReader, &aResult->mAnchor)) {
return false;
}
if (!ReadParam(aReader, &aResult->mCrossOrigin)) {
return false;
}
if (!ReadParam(aReader, &aResult->mReferrerPolicy)) {
return false;
}
if (!ReadParam(aReader, &aResult->mAs)) {
return false;
}
return ReadParam(aReader, &aResult->mFetchPriority);
};
};
template <>
struct ParamTraits<mozilla::dom::UserActivation::Modifiers> {
typedef mozilla::dom::UserActivation::Modifiers paramType;
static void Write(MessageWriter* aWriter,
const paramType& aParam) {
WriteParam(aWriter, aParam.mModifiers);
}
static bool Read(MessageReader* aReader, paramType* aResult) {
return ReadParam(aReader, &aResult->mModifiers);
};
};
template <>
struct ParamTraits<gfxPlatform::GlobalReflowFlags>
:
public BitFlagsEnumSerializer<gfxPlatform::GlobalReflowFlags,
gfxPlatform::GlobalReflowFlags::ALL_BITS> {
};
template <>
struct ParamTraits<nsILoadInfo::IPAddressSpace>
:
public ContiguousEnumSerializer<nsILoadInfo::IPAddressSpace,
nsILoadInfo::IPAddressSpace::Unknown,
nsILoadInfo::IPAddressSpace::Invalid> {};
using PromptResult = mozilla::dom::ContentPermissionRequestBase::PromptResult;
template <>
struct ParamTraits<PromptResult>
:
public ContiguousEnumSerializerInclusive<
PromptResult, PromptResult::Granted, PromptResult::Pending> {};
}
/* namespace IPC */
#endif /* IPC_GLUE_IPCMESSAGEUTILSSPECIALIZATIONS_H_ */