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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 ts=8 et 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 "nsString.h"
#include "nsTArray.h"
#include "Capsule.h"
#include "CapsuleEncoder.h"
namespace mozilla::net {
CapsuleEncoder::CapsuleEncoder() {
NeqoEncoder::Init(getter_AddRefs(mEncoder));
MOZ_ASSERT(mEncoder);
}
CapsuleEncoder::~CapsuleEncoder() = default;
void CapsuleEncoder::EncodeCapsule(Capsule& aCapsule) {
if (aCapsule.mCapsule.is<UnknownCapsule>()) {
auto& value = aCapsule.mCapsule.as<UnknownCapsule>();
EncodeVarint(value.mType).EncodeBufferWithVarintLen(value.mData);
return;
}
if (aCapsule.mCapsule.is<CloseWebTransportSessionCapsule>()) {
const auto& value = aCapsule.mCapsule.as<CloseWebTransportSessionCapsule>();
EncodeVarint(value.Type())
.EncodeVarint(4 + value.mReason.Length())
.EncodeUint(4, value.mStatus)
.EncodeString(value.mReason);
return;
}
if (aCapsule.mCapsule.is<WebTransportMaxDataCapsule>()) {
auto& value = aCapsule.mCapsule.as<WebTransportMaxDataCapsule>();
EncodeVarint(value.Type())
.EncodeVarint(CapsuleEncoder::VarintLength(value.mMaxDataSize))
.EncodeVarint(value.mMaxDataSize);
return;
}
if (aCapsule.mCapsule.is<WebTransportStreamDataCapsule>()) {
auto& value = aCapsule.mCapsule.as<WebTransportStreamDataCapsule>();
uint64_t length =
CapsuleEncoder::VarintLength(value.mID) + value.mData.Length();
EncodeVarint(value.Type())
.EncodeVarint(length)
.EncodeVarint(value.mID)
.EncodeBuffer(value.mData);
mStreamMetadata = Some(StreamMetadata{
value.mID, value.mData.Length(),
CapsuleEncoder::VarintLength(static_cast<uint64_t>(value.Type())) +
CapsuleEncoder::VarintLength(length) +
CapsuleEncoder::VarintLength(value.mID)});
return;
}
if (aCapsule.mCapsule.is<WebTransportStreamsBlockedCapsule>()) {
auto& value = aCapsule.mCapsule.as<WebTransportStreamsBlockedCapsule>();
EncodeVarint(value.Type())
.EncodeVarint(CapsuleEncoder::VarintLength(value.mLimit))
.EncodeVarint(value.mLimit);
return;
}
if (aCapsule.mCapsule.is<WebTransportMaxStreamsCapsule>()) {
auto& value = aCapsule.mCapsule.as<WebTransportMaxStreamsCapsule>();
EncodeVarint(value.Type())
.EncodeVarint(CapsuleEncoder::VarintLength(value.mLimit))
.EncodeVarint(value.mLimit);
return;
}
if (aCapsule.mCapsule.is<WebTransportStreamDataBlockedCapsule>()) {
auto& value = aCapsule.mCapsule.as<WebTransportStreamDataBlockedCapsule>();
EncodeVarint(value.Type())
.EncodeVarint(CapsuleEncoder::VarintLength(value.mID) +
CapsuleEncoder::VarintLength(value.mLimit))
.EncodeVarint(value.mID)
.EncodeVarint(value.mLimit);
return;
}
if (aCapsule.mCapsule.is<WebTransportMaxStreamDataCapsule>()) {
auto& value = aCapsule.mCapsule.as<WebTransportMaxStreamDataCapsule>();
EncodeVarint(value.Type())
.EncodeVarint(CapsuleEncoder::VarintLength(value.mID) +
CapsuleEncoder::VarintLength(value.mLimit))
.EncodeVarint(value.mID)
.EncodeVarint(value.mLimit);
return;
}
if (aCapsule.mCapsule.is<WebTransportDataBlockedCapsule>()) {
auto& value = aCapsule.mCapsule.as<WebTransportDataBlockedCapsule>();
EncodeVarint(value.Type())
.EncodeVarint(CapsuleEncoder::VarintLength(value.mLimit))
.EncodeVarint(value.mLimit);
return;
}
if (aCapsule.mCapsule.is<WebTransportStopSendingCapsule>()) {
auto& value = aCapsule.mCapsule.as<WebTransportStopSendingCapsule>();
EncodeVarint(value.Type())
.EncodeVarint(CapsuleEncoder::VarintLength(value.mID) +
CapsuleEncoder::VarintLength(value.mErrorCode))
.EncodeVarint(value.mID)
.EncodeVarint(value.mErrorCode);
return;
}
if (aCapsule.mCapsule.is<WebTransportResetStreamCapsule>()) {
auto& value = aCapsule.mCapsule.as<WebTransportResetStreamCapsule>();
EncodeVarint(value.Type())
.EncodeVarint(CapsuleEncoder::VarintLength(value.mID) +
CapsuleEncoder::VarintLength(value.mErrorCode) +
CapsuleEncoder::VarintLength(value.mReliableSize))
.EncodeVarint(value.mID)
.EncodeVarint(value.mErrorCode)
.EncodeVarint(value.mReliableSize);
return;
}
if (aCapsule.mCapsule.is<WebTransportDatagramCapsule>()) {
auto& value = aCapsule.mCapsule.as<WebTransportDatagramCapsule>();
uint64_t length = value.mPayload.Length();
EncodeVarint(value.Type())
.EncodeVarint(length)
.EncodeBuffer(value.mPayload);
return;
}
}
CapsuleEncoder& CapsuleEncoder::EncodeByte(uint8_t aData) {
mEncoder->EncodeByte(aData);
return *this;
}
template <typename T>
CapsuleEncoder& CapsuleEncoder::EncodeUint(uint32_t aSize, T aValue) {
uint64_t value = static_cast<uint64_t>(aValue);
mEncoder->EncodeUint(aSize, value);
return *this;
}
template <typename T>
CapsuleEncoder& CapsuleEncoder::EncodeVarint(T aValue) {
uint64_t value = static_cast<uint64_t>(aValue);
mEncoder->EncodeVarint(value);
return *this;
}
CapsuleEncoder& CapsuleEncoder::EncodeString(const nsACString& aData) {
mEncoder->EncodeBuffer(reinterpret_cast<const uint8_t*>(aData.BeginReading()),
aData.Length());
return *this;
}
CapsuleEncoder& CapsuleEncoder::EncodeBuffer(nsTArray<uint8_t>& aData) {
mEncoder->EncodeBuffer(aData.Elements(), aData.Length());
return *this;
}
CapsuleEncoder& CapsuleEncoder::EncodeBufferWithVarintLen(
nsTArray<uint8_t>& aData) {
mEncoder->EncodeBufferWithVarintLen(aData.Elements(), aData.Length());
return *this;
}
// static
size_t CapsuleEncoder::VarintLength(uint64_t aValue) {
return NeqoEncoder::VarintLength(aValue);
}
mozilla::Span<const uint8_t> CapsuleEncoder::GetBuffer() {
const uint8_t* buffer = nullptr;
uint32_t length = 0;
mEncoder->GetData(&buffer, &length);
return Span<const uint8_t>(buffer, length);
}
} // namespace mozilla::net
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