420 lines
12 KiB
C++
420 lines
12 KiB
C++
/**
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* vim: set ts=4 :
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* =============================================================================
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* SourceMod SDKTools Extension
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* Copyright (C) 2004-2008 AlliedModders LLC. All rights reserved.
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* =============================================================================
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License, version 3.0, as published by the
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* Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* As a special exception, AlliedModders LLC gives you permission to link the
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* code of this program (as well as its derivative works) to "Half-Life 2," the
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* "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
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* by the Valve Corporation. You must obey the GNU General Public License in
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* all respects for all other code used. Additionally, AlliedModders LLC grants
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* this exception to all derivative works. AlliedModders LLC defines further
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* exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
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* or <http://www.sourcemod.net/license.php>.
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*
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* Version: $Id$
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*/
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#include "hooks.h"
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#include "extension.h"
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#include "basehandle.h"
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#include "vector.h"
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#include "utlvector.h"
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#include <shareddefs.h>
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#include "usercmd.h"
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#include "filesystem.h"
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#define FEATURECAP_PLAYERRUNCMD_11PARAMS "SDKTools PlayerRunCmd 11Params"
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CHookManager g_Hooks;
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static bool PRCH_enabled = false;
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static bool PRCH_used = false;
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static bool FILE_used = false;
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SH_DECL_MANUALHOOK2_void(PlayerRunCmdHook, 0, 0, 0, CUserCmd *, IMoveHelper *);
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SH_DECL_HOOK2(IBaseFileSystem, FileExists, SH_NOATTRIB, 0, bool, const char*, const char *);
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#if SOURCE_ENGINE >= SE_ALIENSWARM || SOURCE_ENGINE == SE_LEFT4DEAD || SOURCE_ENGINE == SE_LEFT4DEAD2
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SH_DECL_HOOK3(INetChannel, SendFile, SH_NOATTRIB, 0, bool, const char *, unsigned int, bool);
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#else
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SH_DECL_HOOK2(INetChannel, SendFile, SH_NOATTRIB, 0, bool, const char *, unsigned int);
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#endif
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SH_DECL_HOOK2_void(INetChannel, ProcessPacket, SH_NOATTRIB, 0, struct netpacket_s *, bool);
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SourceHook::CallClass<IBaseFileSystem> *basefilesystemPatch = NULL;
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CHookManager::CHookManager()
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{
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m_usercmdsFwd = NULL;
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m_netFileSendFwd = NULL;
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m_netFileReceiveFwd = NULL;
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m_pActiveNetChannel = NULL;
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}
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void CHookManager::Initialize()
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{
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int offset;
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if (g_pGameConf->GetOffset("PlayerRunCmd", &offset))
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{
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SH_MANUALHOOK_RECONFIGURE(PlayerRunCmdHook, offset, 0, 0);
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PRCH_enabled = true;
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}
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else
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{
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g_pSM->LogError(myself, "Failed to find PlayerRunCmd offset - OnPlayerRunCmd forward disabled.");
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PRCH_enabled = false;
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}
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SH_ADD_HOOK(IBaseFileSystem, FileExists, basefilesystem, SH_MEMBER(this, &CHookManager::FileExists), false);
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basefilesystemPatch = SH_GET_CALLCLASS(basefilesystem);
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m_netFileSendFwd = forwards->CreateForward("OnFileSend", ET_Event, 2, NULL, Param_Cell, Param_String);
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m_netFileReceiveFwd = forwards->CreateForward("OnFileReceive", ET_Event, 2, NULL, Param_Cell, Param_String);
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plsys->AddPluginsListener(this);
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sharesys->AddCapabilityProvider(myself, this, FEATURECAP_PLAYERRUNCMD_11PARAMS);
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m_usercmdsFwd = forwards->CreateForward("OnPlayerRunCmd", ET_Event, 11, NULL,
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Param_Cell, // client
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Param_CellByRef, // buttons
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Param_CellByRef, // impulse
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Param_Array, // Float:vel[3]
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Param_Array, // Float:angles[3]
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Param_CellByRef, // weapon
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Param_CellByRef, // subtype
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Param_CellByRef, // cmdnum
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Param_CellByRef, // tickcount
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Param_CellByRef, // seed
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Param_Array); // mouse[2]
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}
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void CHookManager::Shutdown()
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{
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forwards->ReleaseForward(m_usercmdsFwd);
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forwards->ReleaseForward(m_netFileSendFwd);
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forwards->ReleaseForward(m_netFileReceiveFwd);
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plsys->RemovePluginsListener(this);
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sharesys->DropCapabilityProvider(myself, this, FEATURECAP_PLAYERRUNCMD_11PARAMS);
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}
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void CHookManager::OnClientConnect(int client)
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{
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NetChannelHook(client);
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}
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void CHookManager::OnClientPutInServer(int client)
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{
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PlayerRunCmdHook(client);
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}
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void CHookManager::PlayerRunCmdHook(int client)
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{
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if (!PRCH_used)
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return;
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edict_t *pEdict = PEntityOfEntIndex(client);
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if (!pEdict)
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{
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return;
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}
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IServerUnknown *pUnknown = pEdict->GetUnknown();
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if (!pUnknown)
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{
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return;
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}
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CBaseEntity *pEntity = pUnknown->GetBaseEntity();
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if (!pEntity)
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{
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return;
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}
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CVTableHook hook(pEntity);
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for (size_t i = 0; i < m_runUserCmdHooks.length(); ++i)
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{
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if (hook == m_runUserCmdHooks[i])
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{
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return;
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}
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}
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int hookid = SH_ADD_MANUALVPHOOK(PlayerRunCmdHook, pEntity, SH_MEMBER(this, &CHookManager::PlayerRunCmd), false);
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hook.SetHookID(hookid);
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m_runUserCmdHooks.append(new CVTableHook(hook));
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}
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void CHookManager::PlayerRunCmd(CUserCmd *ucmd, IMoveHelper *moveHelper)
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{
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if (m_usercmdsFwd->GetFunctionCount() == 0)
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{
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RETURN_META(MRES_IGNORED);
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}
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CBaseEntity *pEntity = META_IFACEPTR(CBaseEntity);
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if (!pEntity)
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{
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RETURN_META(MRES_IGNORED);
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}
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edict_t *pEdict = gameents->BaseEntityToEdict(pEntity);
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if (!pEdict)
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{
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RETURN_META(MRES_IGNORED);
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}
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int client = IndexOfEdict(pEdict);
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cell_t result = 0;
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/* Impulse is a byte so we copy it back manually */
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cell_t impulse = ucmd->impulse;
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cell_t vel[3] = {sp_ftoc(ucmd->forwardmove), sp_ftoc(ucmd->sidemove), sp_ftoc(ucmd->upmove)};
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cell_t angles[3] = {sp_ftoc(ucmd->viewangles.x), sp_ftoc(ucmd->viewangles.y), sp_ftoc(ucmd->viewangles.z)};
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cell_t mouse[2] = {ucmd->mousedx, ucmd->mousedy};
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m_usercmdsFwd->PushCell(client);
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m_usercmdsFwd->PushCellByRef(&ucmd->buttons);
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m_usercmdsFwd->PushCellByRef(&impulse);
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m_usercmdsFwd->PushArray(vel, 3, SM_PARAM_COPYBACK);
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m_usercmdsFwd->PushArray(angles, 3, SM_PARAM_COPYBACK);
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m_usercmdsFwd->PushCellByRef(&ucmd->weaponselect);
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m_usercmdsFwd->PushCellByRef(&ucmd->weaponsubtype);
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m_usercmdsFwd->PushCellByRef(&ucmd->command_number);
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m_usercmdsFwd->PushCellByRef(&ucmd->tick_count);
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m_usercmdsFwd->PushCellByRef(&ucmd->random_seed);
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m_usercmdsFwd->PushArray(mouse, 2, SM_PARAM_COPYBACK);
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m_usercmdsFwd->Execute(&result);
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ucmd->impulse = impulse;
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ucmd->forwardmove = sp_ctof(vel[0]);
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ucmd->sidemove = sp_ctof(vel[1]);
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ucmd->upmove = sp_ctof(vel[2]);
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ucmd->viewangles.x = sp_ctof(angles[0]);
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ucmd->viewangles.y = sp_ctof(angles[1]);
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ucmd->viewangles.z = sp_ctof(angles[2]);
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ucmd->mousedx = mouse[0];
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ucmd->mousedy = mouse[1];
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if (result == Pl_Handled)
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{
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RETURN_META(MRES_SUPERCEDE);
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}
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RETURN_META(MRES_IGNORED);
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}
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void CHookManager::NetChannelHook(int client)
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{
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if (!FILE_used)
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return;
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INetChannel *pNetChannel = static_cast<INetChannel *>(engine->GetPlayerNetInfo(client));
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if (pNetChannel == NULL)
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{
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return;
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}
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/* Normal NetChannel Hooks. */
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{
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CVTableHook hook(pNetChannel);
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size_t iter;
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for (iter = 0; iter < m_netChannelHooks.length(); ++iter)
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{
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/* We can technically skip 2; even technical-ier, this could be a bool; but Valve. */
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if (hook == m_netChannelHooks[iter])
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{
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break;
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}
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}
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if (iter == m_netChannelHooks.length())
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{
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int hookid = SH_ADD_VPHOOK(INetChannel, SendFile, pNetChannel, SH_MEMBER(this, &CHookManager::SendFile), false);
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hook.SetHookID(hookid);
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m_netChannelHooks.append(new CVTableHook(hook));
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hookid = SH_ADD_VPHOOK(INetChannel, ProcessPacket, pNetChannel, SH_MEMBER(this, &CHookManager::ProcessPacket), false);
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hook.SetHookID(hookid);
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m_netChannelHooks.append(new CVTableHook(hook));
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hookid = SH_ADD_VPHOOK(INetChannel, ProcessPacket, pNetChannel, SH_MEMBER(this, &CHookManager::ProcessPacket_Post), true);
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hook.SetHookID(hookid);
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m_netChannelHooks.append(new CVTableHook(hook));
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}
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}
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}
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void CHookManager::ProcessPacket(struct netpacket_s *packet, bool bHasHeader)
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{
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if (m_netFileReceiveFwd->GetFunctionCount() == 0)
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{
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RETURN_META(MRES_IGNORED);
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}
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m_pActiveNetChannel = META_IFACEPTR(INetChannel);
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RETURN_META(MRES_IGNORED);
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}
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bool CHookManager::FileExists(const char *filename, const char *pathID)
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{
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if (m_pActiveNetChannel == NULL || m_netFileReceiveFwd->GetFunctionCount() == 0)
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{
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RETURN_META_VALUE(MRES_IGNORED, false);
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}
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bool ret = SH_CALL(basefilesystemPatch, &IBaseFileSystem::FileExists)(filename, pathID);
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if (ret == true) /* If the File Exists, the engine historically bails out. */
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{
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RETURN_META_VALUE(MRES_IGNORED, false);
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}
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int userid = 0;
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IClient *pClient = (IClient *)m_pActiveNetChannel->GetMsgHandler();
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if (pClient != NULL)
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{
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userid = pClient->GetUserID();
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}
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cell_t res = Pl_Continue;
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m_netFileReceiveFwd->PushCell(playerhelpers->GetClientOfUserId(userid));
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m_netFileReceiveFwd->PushString(filename);
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m_netFileReceiveFwd->Execute(&res);
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if (res != Pl_Continue)
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{
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RETURN_META_VALUE(MRES_SUPERCEDE, true);
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}
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RETURN_META_VALUE(MRES_IGNORED, false);
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}
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void CHookManager::ProcessPacket_Post(struct netpacket_s* packet, bool bHasHeader)
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{
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m_pActiveNetChannel = NULL;
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RETURN_META(MRES_IGNORED);
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}
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#if SOURCE_ENGINE >= SE_ALIENSWARM || SOURCE_ENGINE == SE_LEFT4DEAD || SOURCE_ENGINE == SE_LEFT4DEAD2
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bool CHookManager::SendFile(const char *filename, unsigned int transferID, bool isReplayDemo)
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#else
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bool CHookManager::SendFile(const char *filename, unsigned int transferID)
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#endif
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{
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if (m_netFileSendFwd->GetFunctionCount() == 0)
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{
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RETURN_META_VALUE(MRES_IGNORED, false);
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}
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INetChannel *pNetChannel = META_IFACEPTR(INetChannel);
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if (pNetChannel == NULL)
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{
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RETURN_META_VALUE(MRES_IGNORED, false);
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}
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int userid = 0;
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IClient *pClient = (IClient *)m_pActiveNetChannel->GetMsgHandler();
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if (pClient != NULL)
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{
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userid = pClient->GetUserID();
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}
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cell_t res = Pl_Continue;
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m_netFileSendFwd->PushCell(playerhelpers->GetClientOfUserId(userid));
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m_netFileSendFwd->PushString(filename);
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m_netFileSendFwd->Execute(&res);
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if (res != Pl_Continue)
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{
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/* Mimic the Engine. */
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#if SOURCE_ENGINE >= SE_ALIENSWARM || SOURCE_ENGINE == SE_LEFT4DEAD || SOURCE_ENGINE == SE_LEFT4DEAD2
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pNetChannel->DenyFile(filename, transferID, isReplayDemo);
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#else
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pNetChannel->DenyFile(filename, transferID);
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#endif
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RETURN_META_VALUE(MRES_SUPERCEDE, false);
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}
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RETURN_META_VALUE(MRES_IGNORED, false);
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}
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void CHookManager::OnPluginLoaded(IPlugin *plugin)
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{
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if (PRCH_enabled && !PRCH_used && m_usercmdsFwd->GetFunctionCount())
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{
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PRCH_used = true;
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int MaxClients = playerhelpers->GetMaxClients();
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for (int i = 1; i <= MaxClients; i++)
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{
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if (playerhelpers->GetGamePlayer(i)->IsInGame())
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{
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OnClientPutInServer(i);
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}
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}
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}
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if (!FILE_used && (m_netFileSendFwd->GetFunctionCount() || m_netFileReceiveFwd->GetFunctionCount()))
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{
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FILE_used = true;
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int MaxClients = playerhelpers->GetMaxClients();
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for (int i = 1; i <= MaxClients; i++)
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{
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if (playerhelpers->GetGamePlayer(i)->IsConnected())
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{
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OnClientConnect(i);
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}
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}
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}
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}
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void CHookManager::OnPluginUnloaded(IPlugin *plugin)
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{
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if (PRCH_used && !m_usercmdsFwd->GetFunctionCount())
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{
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for (size_t i = 0; i < m_runUserCmdHooks.length(); ++i)
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{
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delete m_runUserCmdHooks[i];
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}
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m_runUserCmdHooks.clear();
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PRCH_used = false;
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}
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if (FILE_used && !m_netFileSendFwd->GetFunctionCount() && !m_netFileReceiveFwd->GetFunctionCount())
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{
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for (size_t i = 0; i < m_netChannelHooks.length(); ++i)
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{
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delete m_netChannelHooks[i];
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}
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m_netChannelHooks.clear();
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FILE_used = false;
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}
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}
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FeatureStatus CHookManager::GetFeatureStatus(FeatureType type, const char *name)
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{
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return FeatureStatus_Available;
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}
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