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// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "cast/common/public/cast_socket.h"
#include "cast/common/channel/message_framer.h"
#include "cast/common/channel/proto/cast_channel.pb.h"
#include "util/osp_logging.h"
namespace openscreen {
namespace cast {
using ::cast::channel::CastMessage;
using message_serialization::DeserializeResult;
CastSocket::CastSocket(std::unique_ptr<TlsConnection> connection,
Client* client)
: connection_(std::move(connection)),
client_(client),
socket_id_(g_next_socket_id_++) {
OSP_DCHECK(client);
connection_->SetClient(this);
}
CastSocket::~CastSocket() {
connection_->SetClient(nullptr);
}
Error CastSocket::Send(const CastMessage& message) {
if (state_ == State::kError) {
return Error::Code::kSocketClosedFailure;
}
const ErrorOr<std::vector<uint8_t>> out =
message_serialization::Serialize(message);
if (!out) {
return out.error();
}
if (!connection_->Send(out.value().data(), out.value().size())) {
return Error::Code::kAgain;
}
return Error::Code::kNone;
}
void CastSocket::SetClient(Client* client) {
OSP_DCHECK(client);
client_ = client;
}
std::array<uint8_t, 2> CastSocket::GetSanitizedIpAddress() {
IPEndpoint remote = connection_->GetRemoteEndpoint();
std::array<uint8_t, 2> result;
uint8_t bytes[16];
if (remote.address.IsV4()) {
remote.address.CopyToV4(bytes);
result[0] = bytes[2];
result[1] = bytes[3];
} else {
remote.address.CopyToV6(bytes);
result[0] = bytes[14];
result[1] = bytes[15];
}
return result;
}
void CastSocket::OnError(TlsConnection* connection, Error error) {
state_ = State::kError;
client_->OnError(this, error);
}
void CastSocket::OnRead(TlsConnection* connection, std::vector<uint8_t> block) {
read_buffer_.insert(read_buffer_.end(), block.begin(), block.end());
// NOTE: Read as many messages as possible out of |read_buffer_| since we only
// get one callback opportunity for this.
do {
ErrorOr<DeserializeResult> message_or_error =
message_serialization::TryDeserialize(
absl::Span<uint8_t>(&read_buffer_[0], read_buffer_.size()));
if (!message_or_error) {
return;
}
read_buffer_.erase(read_buffer_.begin(),
read_buffer_.begin() + message_or_error.value().length);
client_->OnMessage(this, std::move(message_or_error.value().message));
} while (!read_buffer_.empty());
}
int CastSocket::g_next_socket_id_ = 1;
} // namespace cast
} // namespace openscreen
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