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/*
This file is part of Warzone 2100.
Copyright (C) 2024 Warzone 2100 Project
Warzone 2100 is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
Warzone 2100 is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Warzone 2100; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "wz_connection_provider.h"
#include "lib/framework/wzapp.h"
namespace
{
OpenConnectionResult openClientConnectionSyncImpl(const char* host, uint32_t port, std::chrono::milliseconds timeout, std::shared_ptr<WzConnectionProvider> connProvider)
{
if (!connProvider)
{
return OpenConnectionResult(std::make_error_code(std::errc::connection_aborted), "Connection provider no longer valid");
}
auto addrResult = connProvider->resolveHost(host, port);
if (!addrResult.has_value())
{
const auto hostsErr = addrResult.error();
const auto hostsErrMsg = hostsErr.message();
return OpenConnectionResult(hostsErr, astringf("Cannot resolve host \"%s\": [%d]: %s", host, hostsErr.value(), hostsErrMsg.c_str()));
}
auto connRes = connProvider->openClientConnectionAny(*addrResult.value(), timeout.count());
if (!connRes.has_value())
{
const auto connErr = connRes.error();
const auto connErrMsg = connErr.message();
return OpenConnectionResult(connErr, astringf("Cannot resolve host \"%s\": [%d]: %s", host, connErr.value(), connErrMsg.c_str()));
}
return OpenConnectionResult(connRes.value());
}
struct OpenConnectionRequest
{
std::string host;
uint32_t port = 0;
std::chrono::milliseconds timeout{ 15000 };
OpenConnectionToHostResultCallback callback;
std::weak_ptr<WzConnectionProvider> connProvider;
};
int openDirectConnectionAsyncImpl(void* data)
{
OpenConnectionRequest* pRequestInfo = (OpenConnectionRequest*)data;
if (!pRequestInfo)
{
return 1;
}
auto strongConnProvider = pRequestInfo->connProvider.lock();
pRequestInfo->callback(openClientConnectionSyncImpl(
pRequestInfo->host.c_str(),
pRequestInfo->port,
pRequestInfo->timeout,
strongConnProvider));
delete pRequestInfo;
return 0;
}
} // anonymous namespace
bool WzConnectionProvider::openClientConnectionAsync(const std::string& host, uint32_t port, std::chrono::milliseconds timeout, OpenConnectionToHostResultCallback callback)
{
// spawn background thread to handle this
auto pRequest = new OpenConnectionRequest();
pRequest->host = host;
pRequest->port = port;
pRequest->timeout = timeout;
pRequest->callback = callback;
pRequest->connProvider = shared_from_this();
WZ_THREAD* pOpenConnectionThread = wzThreadCreate(openDirectConnectionAsyncImpl, pRequest);
if (pOpenConnectionThread == nullptr)
{
debug(LOG_ERROR, "Failed to create thread for opening connection");
delete pRequest;
return false;
}
wzThreadDetach(pOpenConnectionThread);
// the thread handles deleting pRequest
pOpenConnectionThread = nullptr;
return true;
}
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