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gcmgr.h
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gcmgr.h
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/**
* =============================================================================
* D2Lobby2
* Copyright (C) 2023 Nicholas Hastings
* =============================================================================
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, version 2.0 or later, as published
* by the Free Software Foundation.
*
* This program 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
* this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, you are also granted permission to link the code
* of this program (as well as its derivative works) to "Dota 2," the
* "Source Engine, and any Game MODs that run on software by the Valve Corporation.
* You must obey the GNU General Public License in all respects for all other
* code used. Additionally, this exception is granted to all derivative works.
*/
#pragma once
#include "pluginsystem.h"
#include <steam/steam_gameserver.h>
#include <steam/isteamgamecoordinator.h>
#include <generated_proto/dota_gcmessages_common.pb.h>
#include <queue>
#include <vector>
#include <subhook.h>
class GCManager : public IPluginSystem
{
public:
virtual const char *GetName() const override { return "GC Manager"; }
virtual bool OnLoad() override;
virtual void OnUnload() override;
public:
void Hook_GameServerSteamAPIActivated();
bool Hook_IsMessageAvailable(uint32 *pcubMsgSize);
EGCResults Hook_RetrieveMessage(uint32 *punMsgType, void *pubDest, uint32 cubDest, uint32 *pcubMsgSize);
EGCResults Hook_RetrieveMessagePost(uint32 *punMsgType, void *pubDest, uint32 cubDest, uint32 *pcubMsgSize);
EGCResults Hook_SendMessage(uint32 unMsgType, const void *pubData, uint32 cubData);
public:
void InjectGCMessage(const std::string &msg) {
m_GCMsgsToInject.push(msg);
m_Notify = SteamGCNotify::NeedsNotify;
}
bool NeedsSteamGCNotify() const { return m_Notify == SteamGCNotify::NeedsNotify; }
bool NeedsSteamGCFree() const { return m_Notify == SteamGCNotify::NeedsFree; }
void OnSteamGCNotify() { m_Notify = SteamGCNotify::NeedsFree; }
void OnSteamGCFree() { m_Notify = SteamGCNotify::None; }
private:
inline bool HeaderFromBuffer(CMsgProtoBufHeader &hdr, const void *pubData, uint32 cubData)
{
int headerSize = *(int *)((intptr_t)pubData + 4);
return hdr.ParsePartialFromArray((const void *)((intptr_t)pubData + 8), headerSize);
}
template<typename T>
inline bool MessageFromBuffer(T &msg, const void *pubData, uint32 cubData)
{
int headerSize = *(int *)((intptr_t)pubData + 4);
return msg.ParseFromArray((const void *)((intptr_t)pubData + 8 + headerSize), cubData - headerSize - 8);
}
private:
std::vector<int> m_SteamHooks;
std::queue<std::string> m_GCMsgsToInject;
enum class SteamGCNotify
{
None,
NeedsNotify,
NeedsFree,
};
SteamGCNotify m_Notify = SteamGCNotify::None;
public:
subhook_t m_HookGetCallback;
subhook_t m_HookFreeCallback;
};
extern GCManager g_GCMgr;