xash3d-fwgs/engine/client/cl_securedstub.c

/*
cl_securedstub.c - secured client dll stub
Copyright (C) 2022 FWGS

This program 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 3 of the License, or
(at your option) any later version.

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.
*/

#include "common.h"
#include "client.h"

typedef struct cldll_func_src_s
{
	int	(*pfnInitialize)( cl_enginefunc_t *pEnginefuncs, int iVersion );
	void	(*pfnInit)( void );
	int	(*pfnVidInit)( void );
	int	(*pfnRedraw)( float flTime, int intermission );
	int	(*pfnUpdateClientData)( client_data_t *cdata, float flTime );
	void	(*pfnReset)( void );
	void	(*pfnPlayerMove)( struct playermove_s *ppmove, int server );
	void	(*pfnPlayerMoveInit)( struct playermove_s *ppmove );
	char	(*pfnPlayerMoveTexture)( char *name );
	void	(*IN_ActivateMouse)( void );
	void	(*IN_DeactivateMouse)( void );
	void	(*IN_MouseEvent)( int mstate );
	void	(*IN_ClearStates)( void );
	void	(*IN_Accumulate)( void );
	void	(*CL_CreateMove)( float frametime, struct usercmd_s *cmd, int active );
	int	(*CL_IsThirdPerson)( void );
	void	(*CL_CameraOffset)( float *ofs );	// unused
	void	*(*KB_Find)( const char *name );
	void	(*CAM_Think)( void );		// camera stuff
	void	(*pfnCalcRefdef)( ref_params_t *pparams );
	int	(*pfnAddEntity)( int type, cl_entity_t *ent, const char *modelname );
	void	(*pfnCreateEntities)( void );
	void	(*pfnDrawNormalTriangles)( void );
	void	(*pfnDrawTransparentTriangles)( void );
	void	(*pfnStudioEvent)( const struct mstudioevent_s *event, const cl_entity_t *entity );
	void	(*pfnPostRunCmd)( struct local_state_s *from, struct local_state_s *to, usercmd_t *cmd, int runfuncs, double time, unsigned int random_seed );
	void	(*pfnShutdown)( void );
	void	(*pfnTxferLocalOverrides)( entity_state_t *state, const clientdata_t *client );
	void	(*pfnProcessPlayerState)( entity_state_t *dst, const entity_state_t *src );
	void	(*pfnTxferPredictionData)( entity_state_t *ps, const entity_state_t *pps, clientdata_t *pcd, const clientdata_t *ppcd, weapon_data_t *wd, const weapon_data_t *pwd );
	void	(*pfnDemo_ReadBuffer)( int size, byte *buffer );
	int	(*pfnConnectionlessPacket)( const struct netadr_s *net_from, const char *args, char *buffer, int *size );
	int	(*pfnGetHullBounds)( int hullnumber, float *mins, float *maxs );
	void	(*pfnFrame)( double time );
	int	(*pfnKey_Event)( int eventcode, int keynum, const char *pszCurrentBinding );
	void	(*pfnTempEntUpdate)( double frametime, double client_time, double cl_gravity, struct tempent_s **ppTempEntFree, struct tempent_s **ppTempEntActive, int ( *Callback_AddVisibleEntity )( cl_entity_t *pEntity ), void ( *Callback_TempEntPlaySound )( struct tempent_s *pTemp, float damp ));
	cl_entity_t *(*pfnGetUserEntity)( int index );
	void	(*pfnVoiceStatus)( int entindex, qboolean bTalking );
	void	(*pfnDirectorMessage)( int iSize, void *pbuf );
	int	(*pfnGetStudioModelInterface)( int version, struct r_studio_interface_s **ppinterface, struct engine_studio_api_s *pstudio );
	void	(*pfnChatInputPosition)( int *x, int *y );
	int	(*pfnGetPlayerTeam)( int iPlayer );
	void	*(*pfnClientFactory)( void );
} cldll_func_src_t;

typedef struct cldll_func_dst_s
{
	void	(*pfnInitialize)( cl_enginefunc_t **pEnginefuncs, int *iVersion );
	void	(*pfnInit)( void );
	void	(*pfnVidInit)( void );
	void	(*pfnRedraw)( float *flTime, int *intermission );
	void	(*pfnUpdateClientData)( client_data_t **cdata, float *flTime );
	void	(*pfnReset)( void );
	void	(*pfnPlayerMove)( struct playermove_s **ppmove, int *server );
	void	(*pfnPlayerMoveInit)( struct playermove_s **ppmove );
	void	(*pfnPlayerMoveTexture)( char **name );
	void	(*IN_ActivateMouse)( void );
	void	(*IN_DeactivateMouse)( void );
	void	(*IN_MouseEvent)( int *mstate );
	void	(*IN_ClearStates)( void );
	void	(*IN_Accumulate)( void );
	void	(*CL_CreateMove)( float *frametime, struct usercmd_s **cmd, int *active );
	void	(*CL_IsThirdPerson)( void );
	void	(*CL_CameraOffset)( float **ofs );
	void	(*KB_Find)( const char **name );
	void	(*CAM_Think)( void );
	void	(*pfnCalcRefdef)( ref_params_t **pparams );
	void	(*pfnAddEntity)( int *type, cl_entity_t **ent, const char **modelname );
	void	(*pfnCreateEntities)( void );
	void	(*pfnDrawNormalTriangles)( void );
	void	(*pfnDrawTransparentTriangles)( void );
	void	(*pfnStudioEvent)( const struct mstudioevent_s **event, const cl_entity_t **entity );
	void	(*pfnPostRunCmd)( struct local_state_s **from, struct local_state_s **to, usercmd_t **cmd, int *runfuncs, double *time, unsigned int *random_seed );
	void	(*pfnShutdown)( void );
	void	(*pfnTxferLocalOverrides)( entity_state_t **state, const clientdata_t **client );
	void	(*pfnProcessPlayerState)( entity_state_t **dst, const entity_state_t **src );
	void	(*pfnTxferPredictionData)( entity_state_t **ps, const entity_state_t **pps, clientdata_t **pcd, const clientdata_t **ppcd, weapon_data_t **wd, const weapon_data_t **pwd );
	void	(*pfnDemo_ReadBuffer)( int *size, byte **buffer );
	void	(*pfnConnectionlessPacket)( const struct netadr_s **net_from, const char **args, char **buffer, int **size );
	void	(*pfnGetHullBounds)( int *hullnumber, float **mins, float **maxs );
	void	(*pfnFrame)( double *time );
	void	(*pfnKey_Event)( int *eventcode, int *keynum, const char **pszCurrentBinding );
	void	(*pfnTempEntUpdate)( double *frametime, double *client_time, double *cl_gravity, struct tempent_s ***ppTempEntFree, struct tempent_s ***ppTempEntActive, int ( **Callback_AddVisibleEntity )( cl_entity_t *pEntity ), void ( **Callback_TempEntPlaySound )( struct tempent_s *pTemp, float damp ));
	void	(*pfnGetUserEntity)( int *index );
	void	(*pfnVoiceStatus)( int *entindex, qboolean *bTalking );
	void	(*pfnDirectorMessage)( int *iSize, void **pbuf );
	void	(*pfnGetStudioModelInterface)( int *version, struct r_studio_interface_s ***ppinterface, struct engine_studio_api_s **pstudio );
	void	(*pfnChatInputPosition)( int **x, int **y );
	void	(*pfnGetPlayerTeam)( int *iPlayer );
} cldll_func_dst_t;

typedef struct modfuncs_s
{
	void	(*m_pfnLoadMod)( char *pchModule );
	void	(*m_pfnCloseMod)( void );
	int	(*m_pfnNCall)( int ijump, int cnArg, ... );
	void	(*m_pfnGetClDstAddrs)( cldll_func_dst_t *pcldstAddrs );
	void	(*m_pfnGetEngDstAddrs)( struct cl_enginefunc_dst_s *pengdstAddrs );
	void	(*m_pfnModuleLoaded)( void );
	void	(*m_pfnProcessOutgoingNet)( struct netchan_s *pchan, struct sizebuf_s *psizebuf );
	qboolean	(*m_pfnProcessIncomingNet)( struct netchan_s *pchan, struct sizebuf_s *psizebuf );
	void	(*m_pfnTextureLoad)( char *pszName, int dxWidth, int dyHeight, char *pbData );
	void	(*m_pfnModelLoad)( struct model_s *pmodel, void *pvBuf );
	void	(*m_pfnFrameBegin)( void );
	void	(*m_pfnFrameRender1)( void );
	void	(*m_pfnFrameRender2)( void );
	void	(*m_pfnSetModSHelpers)( struct modshelpers_s *pmodshelpers );
	void	(*m_pfnSetModCHelpers)( struct modchelpers_s *pmodchelpers );
	void	(*m_pfnSetEngData)( struct engdata_s *pengdata );
	int	m_nVersion;
	void	(*m_pfnConnectClient)( int iPlayer );
	void	(*m_pfnRecordIP)( unsigned int pnIP );
	void	(*m_pfnPlayerStatus)( unsigned char *pbData, int cbData );
	void	(*m_pfnSetEngineVersion)( int nVersion );
	int	m_nVoid2;
	int	m_nVoid3;
	int	m_nVoid4;
	int	m_nVoid5;
	int	m_nVoid6;
	int	m_nVoid7;
	int	m_nVoid8;
	int	m_nVoid9;
} modfuncs_t;

static void DstInitialize( cl_enginefunc_t **pEnginefuncs, int *iVersion )
{
    // stub
}

static void DstInit( void )
{
    // stub
}

static void DstVidInit( void )
{
    // stub
}

static void DstRedraw( float *flTime, int *intermission )
{
    // stub
}

static void DstUpdateClientData( client_data_t **cdata, float *flTime )
{
    // stub
}

static void DstReset( void )
{
    // stub
}

static void DstPlayerMove( struct playermove_s **ppmove, int *server )
{
    // stub
}

static void DstPlayerMoveInit( struct playermove_s **ppmove )
{
    // stub
}

static void DstPlayerMoveTexture( char **name )
{
    // stub
}

static void DstIN_ActivateMouse( void )
{
    // stub
}

static void DstIN_DeactivateMouse( void )
{
    // stub
}

static void DstIN_MouseEvent( int *mstate )
{
    // stub
}

static void DstIN_ClearStates( void )
{
    // stub
}

static void DstIN_Accumulate( void )
{
    // stub
}

static void DstCL_CreateMove( float *frametime, struct usercmd_s **cmd, int *active )
{
    // stub
}

static void DstCL_IsThirdPerson( void )
{
    // stub
}

static void DstCL_CameraOffset( float **ofs )
{
    // stub
}

static void DstKB_Find( const char **name )
{
    // stub
}

static void DstCAM_Think( void )
{
    // stub
}

static void DstCalcRefdef( ref_params_t **pparams )
{
    // stub
}

static void DstAddEntity( int *type, cl_entity_t **ent, const char **modelname )
{
    // stub
}

static void DstCreateEntities( void )
{
    // stub
}

static void DstDrawNormalTriangles( void )
{
    // stub
}

static void DstDrawTransparentTriangles( void )
{
    // stub
}

static void DstStudioEvent( const struct mstudioevent_s **event, const cl_entity_t **entity )
{
    // stub
}

static void DstPostRunCmd( struct local_state_s **from, struct local_state_s **to, usercmd_t **cmd, int *runfuncs, double *time, unsigned int *random_seed )
{
    // stub
}

static void DstShutdown( void )
{
    // stub
}

static void DstTxferLocalOverrides( entity_state_t **state, const clientdata_t **client )
{
    // stub
}

static void DstProcessPlayerState( entity_state_t **dst, const entity_state_t **src )
{
    // stub
}

static void DstTxferPredictionData( entity_state_t **ps, const entity_state_t **pps, clientdata_t **pcd, const clientdata_t **ppcd, weapon_data_t **wd, const weapon_data_t **pwd )
{
    // stub
}

static void DstDemo_ReadBuffer( int *size, byte **buffer )
{
    // stub
}

static void DstConnectionlessPacket( const struct netadr_s **net_from, const char **args, char **buffer, int **size )
{
    // stub
}

static void DstGetHullBounds( int *hullnumber, float **mins, float **maxs )
{
    // stub
}

static void DstFrame( double *time )
{
    // stub
}

static void DstKey_Event( int *eventcode, int *keynum, const char **pszCurrentBinding )
{
    // stub
}

static void DstTempEntUpdate( double *frametime, double *client_time, double *cl_gravity, struct tempent_s ***ppTempEntFree, struct tempent_s ***ppTempEntActive, int ( **Callback_AddVisibleEntity )( cl_entity_t *pEntity ), void ( **Callback_TempEntPlaySound )( struct tempent_s *pTemp, float damp ) )
{
    // stub
}

static void DstGetUserEntity( int *index )
{
    // stub
}

static void DstVoiceStatus( int *entindex, qboolean *bTalking )
{
    // stub
}

static void DstDirectorMessage( int *iSize, void **pbuf )
{
    // stub
}

static void DstGetStudioModelInterface( int *version, struct r_studio_interface_s ***ppinterface, struct engine_studio_api_s **pstudio )
{
    // stub
}

static void DstChatInputPosition( int **x, int **y )
{
    // stub
}

static void DstGetPlayerTeam( int *iPlayer )
{
    // stub
}

static cldll_func_dst_t cldllFuncDst =
{
	DstInitialize,
	DstInit,
	DstVidInit,
	DstRedraw,
	DstUpdateClientData,
	DstReset,
	DstPlayerMove,
	DstPlayerMoveInit,
	DstPlayerMoveTexture,
	DstIN_ActivateMouse,
	DstIN_DeactivateMouse,
	DstIN_MouseEvent,
	DstIN_ClearStates,
	DstIN_Accumulate,
	DstCL_CreateMove,
	DstCL_IsThirdPerson,
	DstCL_CameraOffset,
	DstKB_Find,
	DstCAM_Think,
	DstCalcRefdef,
	DstAddEntity,
	DstCreateEntities,
	DstDrawNormalTriangles,
	DstDrawTransparentTriangles,
	DstStudioEvent,
	DstPostRunCmd,
	DstShutdown,
	DstTxferLocalOverrides,
	DstProcessPlayerState,
	DstTxferPredictionData,
	DstDemo_ReadBuffer,
	DstConnectionlessPacket,
	DstGetHullBounds,
	DstFrame,
	DstKey_Event,
	DstTempEntUpdate,
	DstGetUserEntity,
	DstVoiceStatus,
	DstDirectorMessage,
	DstGetStudioModelInterface,
	DstChatInputPosition,
	DstGetPlayerTeam,
};

void GetSecuredClientAPI( CL_EXPORT_FUNCS F )
{
	cldll_func_src_t cldllFuncSrc;
	modfuncs_t modFuncs;
	const dllfunc_t *func;

	memset( &cldllFuncSrc, 0, sizeof( cldllFuncSrc ) );
	memset( &modFuncs, 0, sizeof( modFuncs ) );

	// secured client dlls need these
	*(cldll_func_dst_t **)&cldllFuncSrc.pfnVidInit = &cldllFuncDst;
	*(modfuncs_t **)&cldllFuncSrc.pfnInitialize = &modFuncs;

	// trying to fill interface now
	F( &cldllFuncSrc );

	// map exports to xash's cldll_func_t
	clgame.dllFuncs.pfnInitialize = cldllFuncSrc.pfnInitialize;
	clgame.dllFuncs.pfnInit = cldllFuncSrc.pfnInit;
	clgame.dllFuncs.pfnVidInit = cldllFuncSrc.pfnVidInit;
	clgame.dllFuncs.pfnRedraw = cldllFuncSrc.pfnRedraw;
	clgame.dllFuncs.pfnUpdateClientData = cldllFuncSrc.pfnUpdateClientData;
	clgame.dllFuncs.pfnReset = cldllFuncSrc.pfnReset;
	clgame.dllFuncs.pfnPlayerMove = cldllFuncSrc.pfnPlayerMove;
	clgame.dllFuncs.pfnPlayerMoveInit = cldllFuncSrc.pfnPlayerMoveInit;
	clgame.dllFuncs.pfnPlayerMoveTexture = cldllFuncSrc.pfnPlayerMoveTexture;
	clgame.dllFuncs.IN_ActivateMouse = cldllFuncSrc.IN_ActivateMouse;
	clgame.dllFuncs.IN_DeactivateMouse = cldllFuncSrc.IN_DeactivateMouse;
	clgame.dllFuncs.IN_MouseEvent = cldllFuncSrc.IN_MouseEvent;
	clgame.dllFuncs.IN_ClearStates = cldllFuncSrc.IN_ClearStates;
	clgame.dllFuncs.IN_Accumulate = cldllFuncSrc.IN_Accumulate;
	clgame.dllFuncs.CL_CreateMove = cldllFuncSrc.CL_CreateMove;
	clgame.dllFuncs.CL_IsThirdPerson = cldllFuncSrc.CL_IsThirdPerson;
	clgame.dllFuncs.CL_CameraOffset = cldllFuncSrc.CL_CameraOffset;
	clgame.dllFuncs.KB_Find = cldllFuncSrc.KB_Find;
	clgame.dllFuncs.CAM_Think = cldllFuncSrc.CAM_Think;
	clgame.dllFuncs.pfnCalcRefdef = cldllFuncSrc.pfnCalcRefdef;
	clgame.dllFuncs.pfnAddEntity = cldllFuncSrc.pfnAddEntity;
	clgame.dllFuncs.pfnCreateEntities = cldllFuncSrc.pfnCreateEntities;
	clgame.dllFuncs.pfnDrawNormalTriangles = cldllFuncSrc.pfnDrawNormalTriangles;
	clgame.dllFuncs.pfnDrawTransparentTriangles = cldllFuncSrc.pfnDrawTransparentTriangles;
	clgame.dllFuncs.pfnStudioEvent = cldllFuncSrc.pfnStudioEvent;
	clgame.dllFuncs.pfnPostRunCmd = cldllFuncSrc.pfnPostRunCmd;
	clgame.dllFuncs.pfnShutdown = cldllFuncSrc.pfnShutdown;
	clgame.dllFuncs.pfnTxferLocalOverrides = cldllFuncSrc.pfnTxferLocalOverrides;
	clgame.dllFuncs.pfnProcessPlayerState = cldllFuncSrc.pfnProcessPlayerState;
	clgame.dllFuncs.pfnTxferPredictionData = cldllFuncSrc.pfnTxferPredictionData;
	clgame.dllFuncs.pfnDemo_ReadBuffer = cldllFuncSrc.pfnDemo_ReadBuffer;
	clgame.dllFuncs.pfnConnectionlessPacket = cldllFuncSrc.pfnConnectionlessPacket;
	clgame.dllFuncs.pfnGetHullBounds = cldllFuncSrc.pfnGetHullBounds;
	clgame.dllFuncs.pfnFrame = cldllFuncSrc.pfnFrame;
	clgame.dllFuncs.pfnKey_Event = cldllFuncSrc.pfnKey_Event;
	clgame.dllFuncs.pfnTempEntUpdate = cldllFuncSrc.pfnTempEntUpdate;
	clgame.dllFuncs.pfnGetUserEntity = cldllFuncSrc.pfnGetUserEntity;
	clgame.dllFuncs.pfnVoiceStatus = cldllFuncSrc.pfnVoiceStatus;
	clgame.dllFuncs.pfnDirectorMessage = cldllFuncSrc.pfnDirectorMessage;
	clgame.dllFuncs.pfnGetStudioModelInterface = cldllFuncSrc.pfnGetStudioModelInterface;
	clgame.dllFuncs.pfnChatInputPosition = cldllFuncSrc.pfnChatInputPosition;
}