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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/direct_sockets/udp_writable_stream_wrapper.h"
#include "base/metrics/histogram_functions.h"
#include "net/base/net_errors.h"
#include "third_party/blink/public/mojom/direct_sockets/direct_sockets.mojom-blink.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise_resolver.h"
#include "third_party/blink/renderer/bindings/core/v8/to_v8_traits.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_throw_dom_exception.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_typedefs.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_union_arraybuffer_arraybufferview.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_socket_dns_query_type.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_udp_message.h"
#include "third_party/blink/renderer/core/core_probes_inl.h"
#include "third_party/blink/renderer/core/dom/abort_signal.h"
#include "third_party/blink/renderer/core/dom/dom_exception.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/core/execution_context/execution_context_lifecycle_observer.h"
#include "third_party/blink/renderer/core/frame/report.h"
#include "third_party/blink/renderer/core/streams/underlying_sink_base.h"
#include "third_party/blink/renderer/core/streams/writable_stream.h"
#include "third_party/blink/renderer/core/streams/writable_stream_default_controller.h"
#include "third_party/blink/renderer/core/typed_arrays/dom_array_piece.h"
#include "third_party/blink/renderer/modules/direct_sockets/stream_wrapper.h"
#include "third_party/blink/renderer/modules/direct_sockets/udp_socket_mojo_remote.h"
#include "third_party/blink/renderer/platform/bindings/exception_code.h"
#include "third_party/blink/renderer/platform/bindings/exception_state.h"
#include "third_party/blink/renderer/platform/bindings/script_state.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/heap/persistent.h"
namespace blink {
// UDPWritableStreamWrapper definition
UDPWritableStreamWrapper::UDPWritableStreamWrapper(
ScriptState* script_state,
CloseOnceCallback on_close,
const Member<UDPSocketMojoRemote> udp_socket,
network::mojom::blink::RestrictedUDPSocketMode mode,
uint64_t inspector_id)
: WritableStreamWrapper(script_state),
on_close_(std::move(on_close)),
udp_socket_(udp_socket),
mode_(mode),
inspector_id_(inspector_id) {
ScriptState::Scope scope(script_state);
auto* sink = WritableStreamWrapper::MakeForwardingUnderlyingSink(this);
SetSink(sink);
auto* writable = WritableStream::CreateWithCountQueueingStrategy(
script_state, sink, /*high_water_mark=*/1);
SetWritable(writable);
}
bool UDPWritableStreamWrapper::HasPendingWrite() const {
return !!write_promise_resolver_;
}
void UDPWritableStreamWrapper::Trace(Visitor* visitor) const {
visitor->Trace(udp_socket_);
visitor->Trace(write_promise_resolver_);
WritableStreamWrapper::Trace(visitor);
}
void UDPWritableStreamWrapper::OnAbortSignal() {
if (write_promise_resolver_) {
write_promise_resolver_->Reject(
Controller()->signal()->reason(GetScriptState()));
write_promise_resolver_ = nullptr;
}
}
ScriptPromise<IDLUndefined> UDPWritableStreamWrapper::Write(
ScriptValue chunk,
ExceptionState& exception_state) {
DCHECK(udp_socket_->get().is_bound());
UDPMessage* message = UDPMessage::Create(GetScriptState()->GetIsolate(),
chunk.V8Value(), exception_state);
if (exception_state.HadException()) {
return EmptyPromise();
}
if (!message->hasData()) {
exception_state.ThrowTypeError("UDPMessage: missing 'data' field.");
return EmptyPromise();
}
std::optional<net::HostPortPair> dest_addr;
if (message->hasRemoteAddress() && message->hasRemotePort()) {
if (mode_ == network::mojom::RestrictedUDPSocketMode::CONNECTED) {
exception_state.ThrowTypeError(
"UDPMessage: 'remoteAddress' and 'remotePort' must not be specified "
"in 'connected' mode.");
return EmptyPromise();
}
dest_addr = net::HostPortPair(message->remoteAddress().Utf8(),
message->remotePort());
} else if (message->hasRemoteAddress() || message->hasRemotePort()) {
exception_state.ThrowTypeError(
"UDPMessage: either none or both 'remoteAddress' and 'remotePort' "
"fields must be specified.");
return EmptyPromise();
} else if (mode_ == network::mojom::RestrictedUDPSocketMode::BOUND) {
exception_state.ThrowTypeError(
"UDPMessage: 'remoteAddress' and 'remotePort' must be specified "
"in 'bound' mode.");
return EmptyPromise();
}
auto dns_query_type = net::DnsQueryType::UNSPECIFIED;
if (message->hasDnsQueryType()) {
if (mode_ == network::mojom::RestrictedUDPSocketMode::CONNECTED) {
exception_state.ThrowTypeError(
"UDPMessage: 'dnsQueryType' must not be specified "
"in 'connected' mode.");
return EmptyPromise();
}
switch (message->dnsQueryType().AsEnum()) {
case V8SocketDnsQueryType::Enum::kIpv4:
dns_query_type = net::DnsQueryType::A;
break;
case V8SocketDnsQueryType::Enum::kIpv6:
dns_query_type = net::DnsQueryType::AAAA;
break;
}
}
DOMArrayPiece array_piece(message->data());
base::span<const uint8_t> data = array_piece.ByteSpan();
if (data.empty()) {
exception_state.ThrowTypeError(
"UDPMessage: 'data' field must not be empty.");
return EmptyPromise();
}
DCHECK(!write_promise_resolver_);
write_promise_resolver_ =
MakeGarbageCollected<ScriptPromiseResolver<IDLUndefined>>(
GetScriptState(), exception_state.GetContext());
auto callback = WTF::BindOnce(&UDPWritableStreamWrapper::OnSend,
WrapWeakPersistent(this));
if (dest_addr) {
udp_socket_->get()->SendTo(data, *dest_addr, dns_query_type,
std::move(callback));
} else {
udp_socket_->get()->Send(data, std::move(callback));
}
// report to CDP
{
std::optional<String> probe_remote_addr;
std::optional<uint16_t> probe_remote_port;
if (message->hasRemoteAddress()) {
probe_remote_addr = message->remoteAddress();
}
if (message->hasRemotePort()) {
probe_remote_port = message->remotePort();
}
probe::DirectUDPSocketChunkSent(*GetScriptState(), inspector_id_, data,
std::move(probe_remote_addr),
std::move(probe_remote_port));
}
return write_promise_resolver_->Promise();
}
void UDPWritableStreamWrapper::OnSend(int32_t result) {
if (write_promise_resolver_) {
if (result == net::Error::OK) {
write_promise_resolver_->Resolve();
write_promise_resolver_ = nullptr;
} else {
ErrorStream(result);
}
DCHECK(!write_promise_resolver_);
}
}
void UDPWritableStreamWrapper::CloseStream() {
if (GetState() != State::kOpen) {
return;
}
SetState(State::kClosed);
DCHECK(!write_promise_resolver_);
std::move(on_close_).Run(/*exception=*/v8::Local<v8::Value>(),
/*net_error=*/net::OK);
}
void UDPWritableStreamWrapper::ErrorStream(int32_t error_code) {
if (GetState() != State::kOpen) {
return;
}
SetState(State::kAborted);
// Error codes are negative.
base::UmaHistogramSparse("DirectSockets.UDPWritableStreamError", -error_code);
auto* script_state = write_promise_resolver_
? write_promise_resolver_->GetScriptState()
: GetScriptState();
// Scope is needed because there's no ScriptState* on the call stack for
// ScriptValue.
ScriptState::Scope scope{script_state};
auto message =
String{"Stream aborted by the remote: " + net::ErrorToString(error_code)};
auto exception = V8ThrowDOMException::CreateOrDie(
script_state->GetIsolate(), DOMExceptionCode::kNetworkError, message);
if (write_promise_resolver_) {
write_promise_resolver_->Reject(exception);
write_promise_resolver_ = nullptr;
} else {
Controller()->error(script_state,
ScriptValue(script_state->GetIsolate(), exception));
}
std::move(on_close_).Run(exception, error_code);
}
} // namespace blink
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