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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/channel/virtual_connection_router.h"
#include <utility>
#include "cast/common/channel/cast_message_handler.h"
#include "cast/common/channel/message_util.h"
#include "cast/common/channel/proto/cast_channel.pb.h"
#include "cast/common/channel/virtual_connection_manager.h"
#include "util/osp_logging.h"
namespace openscreen {
namespace cast {
using ::cast::channel::CastMessage;
VirtualConnectionRouter::VirtualConnectionRouter(
VirtualConnectionManager* vc_manager)
: vc_manager_(vc_manager) {
OSP_DCHECK(vc_manager);
}
VirtualConnectionRouter::~VirtualConnectionRouter() = default;
bool VirtualConnectionRouter::AddHandlerForLocalId(
std::string local_id,
CastMessageHandler* endpoint) {
return endpoints_.emplace(std::move(local_id), endpoint).second;
}
bool VirtualConnectionRouter::RemoveHandlerForLocalId(
const std::string& local_id) {
return endpoints_.erase(local_id) == 1u;
}
void VirtualConnectionRouter::TakeSocket(SocketErrorHandler* error_handler,
std::unique_ptr<CastSocket> socket) {
int id = socket->socket_id();
socket->SetClient(this);
sockets_.emplace(id, SocketWithHandler{std::move(socket), error_handler});
}
void VirtualConnectionRouter::CloseSocket(int id) {
auto it = sockets_.find(id);
if (it != sockets_.end()) {
vc_manager_->RemoveConnectionsBySocketId(
id, VirtualConnection::kTransportClosed);
std::unique_ptr<CastSocket> socket = std::move(it->second.socket);
SocketErrorHandler* error_handler = it->second.error_handler;
sockets_.erase(it);
error_handler->OnClose(socket.get());
}
}
Error VirtualConnectionRouter::Send(VirtualConnection virtual_conn,
CastMessage message) {
if (virtual_conn.peer_id == kBroadcastId) {
return BroadcastFromLocalPeer(std::move(virtual_conn.local_id),
std::move(message));
}
if (!IsTransportNamespace(message.namespace_()) &&
!vc_manager_->GetConnectionData(virtual_conn)) {
return Error::Code::kNoActiveConnection;
}
auto it = sockets_.find(virtual_conn.socket_id);
if (it == sockets_.end()) {
return Error::Code::kItemNotFound;
}
message.set_source_id(std::move(virtual_conn.local_id));
message.set_destination_id(std::move(virtual_conn.peer_id));
return it->second.socket->Send(message);
}
Error VirtualConnectionRouter::BroadcastFromLocalPeer(
std::string local_id,
::cast::channel::CastMessage message) {
message.set_source_id(std::move(local_id));
message.set_destination_id(kBroadcastId);
// Broadcast to local endpoints.
for (const auto& entry : endpoints_) {
if (entry.first != message.source_id()) {
entry.second->OnMessage(this, nullptr, message);
}
}
// Broadcast to remote endpoints. If an Error occurs, continue broadcasting,
// and later return the first Error that occurred.
Error error;
for (const auto& entry : sockets_) {
auto result = entry.second.socket->Send(message);
if (!result.ok() && error.ok()) {
error = std::move(result);
}
}
return error;
}
void VirtualConnectionRouter::OnError(CastSocket* socket, Error error) {
const int id = socket->socket_id();
auto it = sockets_.find(id);
if (it != sockets_.end()) {
vc_manager_->RemoveConnectionsBySocketId(id, VirtualConnection::kUnknown);
std::unique_ptr<CastSocket> socket_owned = std::move(it->second.socket);
SocketErrorHandler* error_handler = it->second.error_handler;
sockets_.erase(it);
error_handler->OnError(socket, error);
}
}
void VirtualConnectionRouter::OnMessage(CastSocket* socket,
CastMessage message) {
OSP_DCHECK(socket);
const std::string& local_id = message.destination_id();
if (local_id == kBroadcastId) {
for (const auto& entry : endpoints_) {
entry.second->OnMessage(this, socket, message);
}
} else {
if (!IsTransportNamespace(message.namespace_()) &&
!vc_manager_->GetConnectionData(VirtualConnection{
local_id, message.source_id(), socket->socket_id()})) {
return;
}
auto it = endpoints_.find(local_id);
if (it != endpoints_.end()) {
it->second->OnMessage(this, socket, std::move(message));
}
}
}
} // namespace cast
} // namespace openscreen
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