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extension.cpp
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extension.cpp
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/**
* vim: set ts=4 :
* =============================================================================
* SourceMod Sample Extension
* Copyright (C) 2004-2008 AlliedModders LLC. All rights reserved.
* =============================================================================
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, version 3.0, 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, AlliedModders LLC gives you permission to link the
* code of this program (as well as its derivative works) to "Half-Life 2," the
* "Source Engine," the "SourcePawn JIT," 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, AlliedModders LLC grants
* this exception to all derivative works. AlliedModders LLC defines further
* exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
* or <http://www.sourcemod.net/license.php>.
*
* Version: $Id$
*/
#include "extension.h"
#include "is_message.pb.h"
#include "GCHelper.hpp"
#include <server_class.h>
#include <iserverunknown.h>
#include <iservernetworkable.h>
/**
* @file extension.cpp
* @brief Implement extension code here.
*/
IncrementStattrak g_IncrementStattrak; /**< Global singleton for extension's main interface */
SMEXT_LINK(&g_IncrementStattrak);
SH_DECL_HOOK1_void(IServerGameDLL, GameServerSteamAPIActivated, SH_NOATTRIB, 0, bool);
#ifdef POSIX
#define GetItemIDOffset 15
#else
#define GetItemIDOffset 14
#endif
//https://github.com/alliedmodders/sourcemod/blob/0c8e6e29184bf58851954019a2060d84f0c556f9/extensions/sdkhooks/util.cpp#L37
bool UTIL_ContainsDataTable(SendTable* pTable, const char* name)
{
const char* pname = pTable->GetName();
int props = pTable->GetNumProps();
SendProp* prop;
SendTable* table;
if (pname && strcmp(name, pname) == 0)
return true;
for (int i = 0; i < props; i++)
{
prop = pTable->GetProp(i);
if ((table = prop->GetDataTable()) != nullptr)
{
pname = table->GetName();
if (pname && strcmp(name, pname) == 0)
{
return true;
}
if (UTIL_ContainsDataTable(table, name))
{
return true;
}
}
}
return false;
}
void Hook_GameServerSteamAPIActivated(bool bActivated)
{
if(!bActivated || !GetGCHelper().Init())
{
smutils->LogError(myself, "Steam api initialization failed!");
}
}
static cell_t IS_IncrementStattrak(IPluginContext *pContext, const cell_t *params)
{
if(!GetGCHelper().BInited())
{
return pContext->ThrowNativeError("Steam api initialization failed!");
}
//Following code partialy taken from https://github.com/komashchenko/PTaH/blob/fa943881e6a792bf5fe7f27d75397431346e20f2/natives.cpp#L175
CBaseEntity* pEntity = gamehelpers->ReferenceToEntity(params[3]);
if (!pEntity)
{
return pContext->ThrowNativeError("Entity %d is invalid", params[3]);
}
IServerNetworkable* pNet = reinterpret_cast<IServerUnknown*>(pEntity)->GetNetworkable();
if (!pNet || !UTIL_ContainsDataTable(pNet->GetServerClass()->m_pTable, "DT_EconEntity"))
{
return pContext->ThrowNativeError("Entity %d is not CEconEntity", params[3]);
}
static uint32_t offset = 0;
if (offset == 0)
{
sm_sendprop_info_t info;
gamehelpers->FindSendPropInfo("CEconEntity", "m_Item", &info);
offset = info.actual_offset;
}
//CEconItemView ptr
void* pEconItemView = reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(pEntity) + offset);
//CEconItemView::GetItemID()
uint64_t itemID = ((uint64_t(__cdecl*)(void*))(*(void***)pEconItemView)[GetItemIDOffset])(pEconItemView);
//Send message here
CMsgIncrementKillCountAttribute msg;
msg.set_killer_account_id(params[1]);
msg.set_victim_account_id(params[2]);
msg.set_item_id(itemID);
msg.set_event_type(0);
msg.set_amount(params[4]);
return GetGCHelper().SendMessageToGC(k_EMsgGC_IncrementKillCountAttribute, msg);
}
const sp_nativeinfo_t g_ExtensionNatives[] =
{
{ "IS_IncrementStattrak", IS_IncrementStattrak },
{ NULL, NULL }
};
bool IncrementStattrak::SDK_OnLoad(char *error, size_t maxlen, bool late)
{
SH_ADD_HOOK(IServerGameDLL, GameServerSteamAPIActivated, gamedll, SH_STATIC(&Hook_GameServerSteamAPIActivated), true);
sharesys->AddNatives(myself, g_ExtensionNatives);
sharesys->RegisterLibrary(myself, "IncrementStattrak");
return true;
}
void IncrementStattrak::SDK_OnUnload()
{
SH_REMOVE_HOOK(IServerGameDLL, GameServerSteamAPIActivated, gamedll, SH_STATIC(&Hook_GameServerSteamAPIActivated), true);
}