src/developer/debug/debug_agent/fidl_server.cc

// Copyright 2020 The Fuchsia 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 "src/developer/debug/debug_agent/fidl_server.h"

#include "src/developer/debug/shared/logging/logging.h"

namespace debug_agent {

void DebugAgentImpl::Connect(zx::socket socket, ConnectCallback callback) {
  if (has_connection_) {
    callback(ZX_ERR_ALREADY_BOUND);
    return;
  }

  buffer_ = std::make_unique<debug::BufferedZxSocket>(std::move(socket));

  // Route data from the router_buffer -> RemoteAPIAdapter -> DebugAgent.
  adapter_ = std::make_unique<debug_agent::RemoteAPIAdapter>(debug_agent_, &buffer_->stream());
  buffer_->set_data_available_callback(
      [adapter = adapter_.get()]() { adapter->OnStreamReadable(); });

  // Exit the message loop on error.
  buffer_->set_error_callback([this]() {
    // buffer_ is owned by us, so `this` outlives buffer_.
    DEBUG_LOG(Agent) << "Remote socket connection lost";
    debug::MessageLoop::Current()->QuitNow();
    debug_agent_->Disconnect();
    has_connection_ = false;
  });

  // Connect the buffer into the agent.
  debug_agent_->Connect(&buffer_->stream());
  if (!buffer_->Start()) {
    callback(ZX_ERR_IO);
    return;
  }

  DEBUG_LOG(Agent) << "Remote agent connected to debug_agent";

  has_connection_ = true;
  callback(ZX_OK);
}

}  // namespace debug_agent