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MiniGUI/src/server/request.c

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///////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT NOTICE
//
// The following open source license statement does not apply to any
// entity in the Exception List published by FMSoft.
//
// For more information, please visit:
//
// https://www.fmsoft.cn/exception-list
//
//////////////////////////////////////////////////////////////////////////////
/*
* This file is part of MiniGUI, a mature cross-platform windowing
* and Graphics User Interface (GUI) support system for embedded systems
* and smart IoT devices.
*
* Copyright (C) 2002~2020, Beijing FMSoft Technologies Co., Ltd.
* Copyright (C) 1998~2002, WEI Yongming
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Or,
*
* As this program is a library, any link to this program must follow
* GNU General Public License version 3 (GPLv3). If you cannot accept
* GPLv3, you need to be licensed from FMSoft.
*
* If you have got a commercial license of this program, please use it
* under the terms and conditions of the commercial license.
*
* For more information about the commercial license, please refer to
* <http://www.minigui.com/blog/minigui-licensing-policy/>.
*/
/*
** request.c: handle request of clients.
**
** Current maintainer: Wei Yongming.
**
** Create date: 2000/12/21
**
** NOTE: The idea comes from sample code in APUE.
*/
#include <signal.h>
#include "common.h"
#include "minigui.h"
#include "gdi.h"
#include "window.h"
#include "cliprect.h"
#include "internals.h"
#include "cursor.h"
#include "gal.h"
#include "ourhdr.h"
#include "sockio.h"
#include "client.h"
#include "server.h"
#include "sharedres.h"
#include "misc.h"
typedef void (* ReleaseProc) (void* );
struct GlobalRes
{
struct GlobalRes* next;
struct GlobalRes* prev;
void* key;
void* res;
ReleaseProc release_proc;
};
static void add_global_res (int cli, void* key,
void* res, ReleaseProc release_proc)
{
MG_Client* client = mgClients + cli;
struct GlobalRes *global_res = malloc (sizeof (struct GlobalRes));
if (global_res) {
global_res->key = key;
global_res->res = res;
global_res->release_proc = release_proc;
if (client->global_res == NULL) {
global_res->next = NULL;
global_res->prev = NULL;
client->global_res = global_res;
}
else {
global_res->next = client->global_res;
global_res->prev = NULL;
global_res->next->prev = global_res;
client->global_res = global_res;
}
}
}
#ifdef _MGGAL_MLSHADOW
extern int MLSHADOW_Server(void* request, void* reply);
extern void srvMLSHADOW_DelSurface(void *res);
#endif
static void del_global_res (int cli, void* key, void* res)
{
MG_Client* client = mgClients + cli;
struct GlobalRes *global_res = client->global_res, *next;
while (global_res) {
next = global_res->next;
if (global_res->key == key && global_res->res == res) {
if (global_res->release_proc)
global_res->release_proc (global_res->res);
if (global_res->prev)
global_res->prev->next = global_res->next;
if (global_res->next)
global_res->next->prev = global_res->prev;
if (global_res == client->global_res) {
client->global_res = global_res->next;
}
free (global_res);
break;
}
global_res = next;
}
}
void __mg_release_global_res (int cli)
{
MG_Client* client = mgClients + cli;
struct GlobalRes *global_res = client->global_res, *next;
while (global_res) {
next = global_res->next;
if (global_res->release_proc)
global_res->release_proc (global_res->res);
free (global_res);
global_res = next;
}
}
int GUIAPI ServerSendReplyEx (int clifd,
const void* reply, int len, int fd_to_send)
{
if (!mgIsServer)
return SOCKERR_IO;
{
MSG msg = {HWND_INVALID, 0};
/* send a reply message to indicate this is a reply of request */
if (sock_write (clifd, &msg, sizeof (MSG)) < 0)
return SOCKERR_IO;
}
#if 0
{
if (sock_write (clifd, reply, len) < 0)
return SOCKERR_IO;
return SOCKERR_OK;
}
#else /* use sendmsg */
{
struct iovec iov[1];
struct msghdr msg;
struct cmsghdr *cmsg = NULL;
iov[0].iov_base = (void*)reply;
iov[0].iov_len = len;
msg.msg_iov = iov;
msg.msg_iovlen = 1;
msg.msg_name = NULL;
msg.msg_namelen = 0;
if (fd_to_send >= 0) {
cmsg = alloca (CMSG_LEN (sizeof (int)));
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
cmsg->cmsg_len = CMSG_LEN (sizeof (int));
memcpy (CMSG_DATA (cmsg), &fd_to_send, sizeof (int));
msg.msg_control = cmsg;
msg.msg_controllen = CMSG_LEN (sizeof (int));
}
else {
msg.msg_control = NULL;
msg.msg_controllen = 0;
}
return sock_sendmsg (clifd, &msg, 0);
}
#endif
}
static int load_cursor (int cli, int clifd, void* buff, size_t len)
{
HCURSOR hcsr;
hcsr = LoadCursorFromFile (buff);
#ifdef _MGHAVE_CURSOR
if (hcsr) {
add_global_res (cli, hcsr, hcsr, (ReleaseProc)DestroyCursor);
}
#endif
return ServerSendReply (clifd, &hcsr, sizeof (HCURSOR));
}
#if IS_COMPOSITING_SCHEMA
static int load_cursor_png_file (int cli, int clifd, void* buff, size_t len)
{
int hotspot[2];
HCURSOR hcsr = 0;
if (len <= (sizeof (hotspot) + 1)) // length of file name is 0.
goto ret;
memcpy (hotspot, buff, sizeof(hotspot));
hcsr = LoadCursorFromPNGFile (buff + sizeof(hotspot), hotspot[0], hotspot[1]);
#ifdef _MGHAVE_CURSOR
if (hcsr) {
add_global_res (cli, hcsr, hcsr, (ReleaseProc)DestroyCursor);
}
#endif
ret:
return ServerSendReply (clifd, &hcsr, sizeof (HCURSOR));
}
static int load_cursor_png_mem (int cli, int clifd, void* buff, size_t len)
{
int hotspot[2];
HCURSOR hcsr;
/* check whether has enough PNG data.
* see: https://garethrees.org/2007/11/14/pngcrush/
*/
if (len < (sizeof (hotspot) + 67))
goto ret;
memcpy (hotspot, buff, sizeof(hotspot));
hcsr = LoadCursorFromPNGMem (buff + sizeof(hotspot), len - sizeof (hotspot),
hotspot[0], hotspot[1]);
#ifdef _MGHAVE_CURSOR
if (hcsr) {
add_global_res (cli, hcsr, hcsr, (ReleaseProc)DestroyCursor);
}
#endif
ret:
return ServerSendReply (clifd, &hcsr, sizeof (HCURSOR));
}
static void my_release_sem_for_shared_surf (void* res)
{
int sem_num = (int)(intptr_t)res;
if (__mg_free_sem_for_shared_surf (sem_num)) {
_WRN_PRINTF("Failed to call __mg_free_sem_for_shared_surf (%d)\n",
sem_num);
}
}
static int alloc_sem_for_shared_surf (int cli, int clifd, void* buff, size_t len)
{
int sem_num;
sem_num = __mg_alloc_sem_for_shared_surf ();
if (sem_num >= 0) {
add_global_res (cli, (void*)alloc_sem_for_shared_surf,
(void*)(intptr_t)sem_num,
my_release_sem_for_shared_surf);
}
return ServerSendReply (clifd, &sem_num, sizeof (int));
}
static int free_sem_for_shared_surf (int cli, int clifd, void* buff, size_t len)
{
int ret_value = 0;
int sem_num;
sem_num = *((int*)buff);
del_global_res (cli, (void*)alloc_sem_for_shared_surf,
(void*)(intptr_t)sem_num);
return ServerSendReply (clifd, &ret_value, sizeof (int));
}
#endif /* IS_COMPOSITING_SCHEMA */
static int move_to_layer (int cli, int clifd, void* buff, size_t len)
{
MOVETOLAYERINFO* info = (MOVETOLAYERINFO*)buff;
MOVEDCLIENTINFO moved_info = { INV_LAYER_HANDLE };
MG_Layer* dst_layer;
if (!info->handle_name) {
if (info->layer.name[0] == '\0')
dst_layer = mgClients [cli].layer;
else
dst_layer = __mg_find_layer_by_name (info->layer.name);
}
else
dst_layer = (MG_Layer*)info->layer.handle;
if (dst_layer == NULL)
goto ret;
if (!__mg_is_valid_layer (dst_layer))
goto ret;
if (__mg_move_client_to_layer (mgClients + cli, dst_layer)) {
moved_info.layer = dst_layer;
moved_info.zo_shmid = dst_layer->zorder_shmid;
}
ret:
return ServerSendReply (clifd, &moved_info, sizeof (MOVEDCLIENTINFO));
}
static int calc_position (int cli, int clifd, void* buff, size_t len)
{
CALCPOSINFO* info = (CALCPOSINFO*)buff;
SendMessage (HWND_DESKTOP, MSG_CALC_POSITION, (WPARAM)cli, (LPARAM)info);
return ServerSendReply (clifd, &info->rc, sizeof (RECT));
}
static int create_cursor (int cli, int clifd, void* buff, size_t len)
{
HCURSOR hcsr;
int* tmp;
BYTE* and_bits, *xor_bits;
tmp = (int*)buff;
and_bits = (BYTE*)(tmp + 6);
xor_bits = and_bits + tmp [5];
hcsr = CreateCursor (tmp [0], tmp [1], tmp [2], tmp [3],
and_bits, xor_bits, tmp [4]);
#ifdef _MGHAVE_CURSOR
if (hcsr) {
add_global_res (cli, hcsr, hcsr, NULL);
}
#endif
return ServerSendReply (clifd, &hcsr, sizeof (HCURSOR));
}
static int copy_cursor (int cli, int clifd, void* buff, size_t len)
{
HCURSOR hcsr = CopyCursor ((HCURSOR)*(intptr_t*)buff);
#ifdef _MGHAVE_CURSOR
if (hcsr) {
add_global_res (cli, hcsr, hcsr, NULL);
}
#endif
return ServerSendReply (clifd, &hcsr, sizeof (HCURSOR));
}
static int destroy_cursor (int cli, int clifd, void* buff, size_t len)
{
BOOL ret_value;
HCURSOR hcsr;
hcsr = *((HCURSOR*)buff);
ret_value = DestroyCursor(hcsr);
del_global_res (cli, hcsr, hcsr);
return ServerSendReply (clifd, &ret_value, sizeof (BOOL));
}
static int clip_cursor (int cli, int clifd, void* buff, size_t len)
{
RECT cliprc;
memcpy (&cliprc, buff, sizeof (RECT));
ClipCursor (&cliprc);
return SOCKERR_OK;
}
static int get_clip_cursor (int cli, int clifd, void* buff, size_t len)
{
RECT cliprc;
GetClipCursor (&cliprc);
return ServerSendReply (clifd, &cliprc, sizeof (RECT));
}
static int set_cursor (int cli, int clifd, void* buff, size_t len)
{
HCURSOR hcsr;
HCURSOR old;
memcpy (&hcsr, buff, sizeof (HCURSOR));
old = SetCursorEx (hcsr, FALSE);
return ServerSendReply (clifd, &old, sizeof (HCURSOR));
}
static int get_current_cursor (int cli, int clifd, void* buff, size_t len)
{
HCURSOR hcsr;
hcsr = GetCurrentCursor ();
return ServerSendReply (clifd, &hcsr, sizeof (HCURSOR));
}
#if 0
static int show_cursor_for_gdi (int cli, int clifd, void* buff, size_t len)
{
RECT rc;
BOOL show_hide;
BOOL ret_value = TRUE;
memcpy (&show_hide, buff, sizeof (BOOL));
memcpy (&rc, buff + sizeof (BOOL), sizeof (RECT));
ShowCursorForClientGDI (show_hide, &rc);
return ServerSendReply (clifd, &ret_value, sizeof (BOOL));
}
#endif
static int show_cursor (int cli, int clifd, void* buff, size_t len)
{
BOOL show_hide;
int ret_value;
memcpy (&show_hide, buff, sizeof (BOOL));
ret_value = ShowCursor (show_hide);
return ServerSendReply (clifd, &ret_value, sizeof (BOOL));
}
static int set_cursor_pos (int cli, int clifd, void* buff, size_t len)
{
POINT pt;
memcpy (&pt, buff, sizeof (POINT));
SetCursorPos (pt.x, pt.y);
return SOCKERR_OK;
}
static int layer_info (int cli, int clifd, void* buff, size_t len)
{
LAYERINFO info;
__mg_get_layer_info (cli, (const char*) buff, &info);
return ServerSendReply (clifd, &info, sizeof (LAYERINFO));
}
static int join_layer (int cli, int clifd, void* buff, size_t len)
{
static int nr_layers = 0, nr_clients = 0;
JOINLAYERINFO* info;
JOINEDCLIENTINFO joined_info = {INV_LAYER_HANDLE};
info = (JOINLAYERINFO*) buff;
if (info->layer_name [0] == '\0') {
strcpy (info->layer_name, mgTopmostLayer->name);
nr_layers ++;
}
if (info->client_name [0] == '\0') {
sprintf (info->client_name, "Client-%d", nr_clients);
nr_clients ++;
}
__mg_client_join_layer (cli, info, &joined_info);
return ServerSendReply (clifd, &joined_info, sizeof (JOINEDCLIENTINFO));
}
static int layer_op (int cli, int clifd, void* buff, size_t len)
{
BOOL ret_value = FALSE;
LAYEROPINFO* info = (LAYEROPINFO*)buff;
MG_Layer* layer;
if (!info->handle_name) {
if (info->layer.name[0] == '\0')
layer = mgClients [cli].layer;
else
layer = __mg_find_layer_by_name (info->layer.name);
}
else
layer = (MG_Layer*)info->layer.handle;
if (layer == NULL)
goto ret;
if (!__mg_is_valid_layer (layer))
goto ret;
switch (info->id_op) {
case ID_LAYEROP_DELETE:
ret_value = ServerDeleteLayer (layer);
break;
case ID_LAYEROP_SETTOP:
ret_value = ServerSetTopmostLayer (layer);
break;
}
ret:
return ServerSendReply (clifd, &ret_value, sizeof (BOOL));
}
/* Since 5.0.0: handle fd received for shared surface */
static int zorder_op (int cli, int clifd, void* buff, size_t len, int fd)
{
intptr_t ret_value;
ZORDEROPINFO* info = (ZORDEROPINFO*)buff;
ret_value = __mg_do_zorder_operation (cli, info,
buff + sizeof (ZORDEROPINFO), fd);
return ServerSendReply (clifd, &ret_value, sizeof (intptr_t));
}
static int change_zorder_maskrect (int cli, int clifd, void* buff, size_t len)
{
intptr_t ret_value;
ZORDERMASKRECTOPINFO* info = (ZORDERMASKRECTOPINFO *)buff;
info->rc = (RECT4MASK*)(buff + sizeof (ZORDERMASKRECTOPINFO));
ret_value = __mg_do_zorder_maskrect_operation (cli, info);
return ServerSendReply (clifd, &ret_value, sizeof (intptr_t));
}
#ifdef _MGGAL_SIGMA8654
extern int Sigma8654_ServerOnGetSurface(REQ_SIGMA8654_GETSURFACE *request,
REP_SIGMA8654_GETSURFACE *reply);
static int sigma8654_client_get_surface(int cli, int clifd, void* buff, size_t len)
{
REQ_SIGMA8654_GETSURFACE *request;
REP_SIGMA8654_GETSURFACE reply;
if (Sigma8654_ServerOnGetSurface(request, &reply) < 0)
{
fprintf(stderr, "Nexus_ServerOnGetSurface() failed\n");
return -1;
}
return ServerSendReply (clifd, &reply, sizeof (reply));
}
#endif
#ifdef _MGGAL_NEXUS
extern int Nexus_ServerOnGetSurface(REQ_NEXUS_GETSURFACE *request,
REP_NEXUS_GETSURFACE *reply);
static int nexus_client_get_surface(int cli, int clifd, void* buff, size_t len)
{
REQ_NEXUS_GETSURFACE *request;
REP_NEXUS_GETSURFACE reply;
if (Nexus_ServerOnGetSurface(request, &reply) < 0)
{
fprintf(stderr, "Nexus_ServerOnGetSurface() failed\n");
return -1;
}
return ServerSendReply (clifd, &reply, sizeof (reply));
}
#endif
static int im_live (int cli, int clifd, void* buff, size_t len)
{
unsigned int time;
memcpy (&time, buff, sizeof (unsigned int));
mgClients [cli].last_live_time = time;
return SOCKERR_OK;
}
extern HWND __mg_ime_wnd;
static int open_ime_wnd (int cli, int clifd, void* buff, size_t len)
{
BOOL open;
memcpy (&open, buff, sizeof (BOOL));
if (__mg_ime_wnd) {
if (open)
SendNotifyMessage (__mg_ime_wnd, MSG_IME_OPEN, 0, 0);
else
SendNotifyMessage (__mg_ime_wnd, MSG_IME_CLOSE, 0, 0);
}
return SOCKERR_OK;
}
static int register_hook (int cli, int clifd, void* buff, size_t len)
{
REGHOOKINFO* info;
int ret_value;
info = (REGHOOKINFO*)buff;
ret_value = __mg_do_reghook_operation (cli, info);
return ServerSendReply (clifd, &ret_value, sizeof (int));
}
static int set_ime_stat (int cli, int clifd, void* buff, size_t len)
{
int ret, data;
memcpy(&data, buff, sizeof(int));
ret = SendMessage (HWND_DESKTOP, MSG_IME_SETSTATUS,
HISWORD(data), LOSWORD(data));
return ServerSendReply (clifd, &ret, sizeof (int));
}
static int get_ime_stat (int cli, int clifd, void* buff, size_t len)
{
int ret, data;
memcpy(&data, buff, sizeof(int));
ret = SendMessage (HWND_DESKTOP, MSG_IME_GETSTATUS, (WPARAM)data, 0);
return ServerSendReply (clifd, &ret , sizeof (int));
}
static int set_ime_targetinfo (int cli, int clifd, void* buff, size_t len)
{
int ret;
IME_TARGET_INFO data;
memcpy (&data, buff, sizeof (IME_TARGET_INFO));
ret = SendMessage (HWND_DESKTOP, MSG_IME_SET_TARGET_INFO,
0, (LPARAM)&data);
return ServerSendReply (clifd, &ret, sizeof (int));
}
static int get_ime_targetinfo (int cli, int clifd, void* buff, size_t len)
{
IME_TARGET_INFO data;
SendMessage (HWND_DESKTOP, MSG_IME_GET_TARGET_INFO, 0, (LPARAM)&data);
return ServerSendReply (clifd, &data, sizeof (IME_TARGET_INFO));
}
#ifdef _MGGAL_MLSHADOW
static int handle_mlshadow_req (int cli, int clifd, void* buff, size_t len)
{
int *op_id;
op_id = buff;
switch(*op_id) {
case MLSOP_ID_GET_MASTERINFO:
{
MLSHADOW_REPLY_MASTER_INFO reply;
MLSHADOW_Server(buff, &reply);
ServerSendReply (clifd, &reply, sizeof(reply));
break;
}
case MLSOP_ID_CREATE_SURFACE:
{
MLSHADOW_REPLY_SURFACE_CREATE reply;
MLSHADOW_Server(buff, &reply);
add_global_res (cli, (void*)reply.surface_key,
(void*)reply.surface_key, (ReleaseProc)srvMLSHADOW_DelSurface);
ServerSendReply (clifd, &reply, sizeof(reply));
break;
}
case MLSOP_ID_GET_SLAVEINFO:
{
MLSHADOW_REPLY_SLAVE_GETINFO reply;
MLSHADOW_Server(buff, &reply);
ServerSendReply (clifd, &reply, sizeof(reply));
break;
}
case MLSOP_ID_SET_SLAVEINFO:
{
BOOL reply;
MLSHADOW_Server(buff, &reply);
ServerSendReply (clifd, &reply, sizeof(reply));
break;
}
case MLSOP_ID_DESTROY_SLAVE:
{
BOOL reply;
MLSHADOW_Server(buff, &reply);
ServerSendReply (clifd, &reply, sizeof(reply));
break;
}
}
return 0;
}
#endif
#if IS_SHAREDFB_SCHEMA_PROCS
void release_hw_surface (REQ_HWSURFACE* allocated)
{
/*[humingming./2010/11/24]: don't call GAL_RequestHWSurface,
* this will casue double free or same other problem */
#if 0
REP_HWSURFACE reply;
GAL_RequestHWSurface (allocated, &reply);
#endif
free (allocated);
}
static int req_hw_surface (int cli, int clifd, void* buff, size_t len)
{
REQ_HWSURFACE* request = (REQ_HWSURFACE*) buff;
REP_HWSURFACE reply;
GAL_RequestHWSurface (request, &reply);
if (request->bucket == NULL) {
REQ_HWSURFACE* allocated;
allocated = malloc (sizeof (REQ_HWSURFACE));
if (allocated) {
allocated->w = request->w;
allocated->h = request->h;
allocated->pitch = reply.pitch;
allocated->offset = reply.offset;
allocated->bucket = reply.bucket;
add_global_res (cli, (void*)req_hw_surface,
allocated, (ReleaseProc)release_hw_surface);
}
}
else {
del_global_res (cli, (void*)req_hw_surface, request->bucket);
}
return ServerSendReply (clifd, &reply, sizeof (REP_HWSURFACE));
}
#endif /* IS_SHAREDFB_SCHEMA_PROCS */
#ifdef _MGHAVE_CLIPBOARD
extern int __mg_clipboard_op (int cli, int clifd, void* buff, size_t len);
#endif
#if IS_COMPOSITING_SCHEMA
/* get the fake screen surface (wallpaper pattern surface) */
static int get_shared_surface (int cli, int clifd, void* buff, size_t len)
{
GHANDLE *handle;
SHAREDSURFINFO info;
handle = buff;
assert (__gal_fake_screen);
assert (*handle == 0);
info.flags = __gal_fake_screen->flags;
if (__gal_fake_screen->shared_header) {
info.map_size = __gal_fake_screen->shared_header->pixels_size;
info.map_size += __gal_fake_screen->shared_header->pixels_off;
return ServerSendReplyEx (clifd, &info, sizeof (SHAREDSURFINFO),
__gal_fake_screen->shared_header->fd);
}
else {
info.map_size = 0;
return ServerSendReplyEx (clifd, &info, sizeof (SHAREDSURFINFO), -1);
}
}
#else /* IS_COMPOSITING_SCHEMA */
/* get the rendering surface */
static int get_shared_surface (int cli, int clifd, void* buff, size_t len)
{
int fd = -1;
GHANDLE *handle;
SHAREDSURFINFO info = { 0, 0 };
#ifdef _MGGAL_DRM
handle = buff;
extern int __drm_get_shared_screen_surface (GHANDLE, SHAREDSURFINFO*);
fd = __drm_get_shared_screen_surface (*handle, &info);
#endif
return ServerSendReplyEx (clifd, &info, sizeof (SHAREDSURFINFO), fd);
}
#endif /* not IS_COMPOSITING_SCHEMA */
static struct req_request {
void* handler;
int version;
} handlers [MAX_REQID] =
{
{ load_cursor, 0 },
{ create_cursor, 0 },
{ destroy_cursor, 0 },
{ clip_cursor, 0 },
{ get_clip_cursor, 0 },
{ set_cursor, 0 },
{ get_current_cursor, 0 },
{ show_cursor, 0 },
{ set_cursor_pos, 0 },
{ layer_info, 0 },
{ join_layer, 0 },
{ layer_op, 0 },
{ zorder_op, 1 },
{ im_live, 0 },
{ open_ime_wnd, 0 },
{ set_ime_stat, 0 },
{ get_ime_stat, 0 },
{ register_hook, 0 },
#if IS_SHAREDFB_SCHEMA_PROCS
{ req_hw_surface, 0 },
#else
{ NULL, 0 },
#endif
#ifdef _MGHAVE_CLIPBOARD
{ __mg_clipboard_op, 0 },
#else
{ NULL, 0 },
#endif
#ifdef _MGGAL_MLSHADOW
{ handle_mlshadow_req, 0 },
#else
{ NULL, 0 },
#endif
{ change_zorder_maskrect, 0 },
#ifdef _MGGAL_NEXUS
{ nexus_client_get_surface, 0 },
#else
{ NULL, 0 },
#endif
#ifdef _MGGAL_SIGMA8654
{ sigma8654_client_get_surface, 0 },
#else
{ NULL, 0 },
#endif
{ get_ime_targetinfo, 0 },
{ set_ime_targetinfo, 0 },
{ copy_cursor, 0 },
#if IS_COMPOSITING_SCHEMA
{ get_shared_surface, 0 },
{ load_cursor_png_file, 0 },
{ load_cursor_png_mem, 0 },
{ alloc_sem_for_shared_surf, 0 },
{ free_sem_for_shared_surf, 0 },
#else
{ get_shared_surface, 0 },
{ NULL, 0 },
{ NULL, 0 },
{ NULL, 0 },
{ NULL, 0 },
#endif
{ move_to_layer, 0 },
{ calc_position, 0 },
};
BOOL GUIAPI RegisterRequestHandler (int req_id, REQ_HANDLER your_handler)
{
if (req_id <= MAX_SYS_REQID || req_id > MAX_REQID)
return FALSE;
handlers[req_id - 1].handler = your_handler;
handlers[req_id - 1].version = 0;
return TRUE;
}
BOOL GUIAPI RegisterRequestHandlerV1 (int req_id, REQ_HANDLER_V1 your_handler)
{
if (req_id <= MAX_SYS_REQID || req_id > MAX_REQID)
return FALSE;
handlers[req_id - 1].handler = your_handler;
handlers[req_id - 1].version = 1;
return TRUE;
}
REQ_HANDLER GUIAPI GetRequestHandler (int req_id)
{
if (req_id <= 0 || req_id > MAX_REQID)
return NULL;
if (handlers[req_id - 1].version == 0)
return handlers [req_id - 1].handler;
return NULL;
}
REQ_HANDLER_V1 GUIAPI GetRequestHandlerV1 (int req_id)
{
if (req_id <= 0 || req_id > MAX_REQID)
return NULL;
if (handlers[req_id - 1].version == 1)
return handlers [req_id - 1].handler;
return NULL;
}
void* GUIAPI GetRequestHandlerEx (int req_id, int* version)
{
if (req_id <= 0 || req_id > MAX_REQID)
return NULL;
if (version) {
*version = handlers [req_id - 1].version;
}
return handlers [req_id - 1].handler;
}
static char _request_data_buff [1024];
int __mg_handle_request (int clifd, int req_id, int cli)
{
int n;
char* buff;
size_t req_data_len, ex_data_len;
size_t len_data;
int fd_received = -1;
if ((n = sock_read (clifd, &req_data_len, sizeof (size_t))) == SOCKERR_IO)
return SOCKERR_IO;
else if (n == SOCKERR_CLOSED) {
goto error;
}
if ((n = sock_read (clifd, &ex_data_len, sizeof (size_t))) == SOCKERR_IO)
return SOCKERR_IO;
else if (n == SOCKERR_CLOSED) {
goto error;
}
len_data = req_data_len + ex_data_len;
if (len_data <= sizeof (_request_data_buff)) {
buff = _request_data_buff;
}
else {
buff = malloc (len_data);
if (buff == NULL)
return SOCKERR_INVARG;
}
#if 0
if ((n = sock_read (clifd, buff, len_data)) == SOCKERR_IO)
return SOCKERR_IO;
else if (n == SOCKERR_CLOSED) {
goto error;
}
#else /* use recvmsg */
{
struct iovec iov[2];
struct msghdr msg;
struct cmsghdr *cmsg = NULL;
iov[0].iov_base = buff;
iov[0].iov_len = req_data_len;
iov[1].iov_base = buff + req_data_len;
iov[1].iov_len = ex_data_len;
msg.msg_iov = iov;
msg.msg_iovlen = 2;
msg.msg_name = NULL;
msg.msg_namelen = 0;
cmsg = alloca (CMSG_LEN (sizeof (int)));
msg.msg_control = cmsg;
msg.msg_controllen = CMSG_LEN (sizeof (int));
if ((n = sock_recvmsg (clifd, &msg, 0)) == SOCKERR_IO) {
return SOCKERR_IO;
}
else if (n == SOCKERR_CLOSED) {
goto error;
}
if (msg.msg_controllen == CMSG_LEN (sizeof (int))) {
memcpy (&fd_received, CMSG_DATA(cmsg), sizeof (int));
}
}
#endif
req_id &= ~REQMASK_FLAGS;
if (req_id > MAX_REQID || req_id <= 0 ||
handlers [req_id - 1].handler == NULL)
return SOCKERR_INVARG;
if (handlers [req_id - 1].version == 1) {
REQ_HANDLER_V1 handler = handlers [req_id - 1].handler;
n = handler (cli, clifd, buff, len_data, fd_received);
}
else {
REQ_HANDLER handler = handlers [req_id - 1].handler;
if (fd_received >= 0) {
close (fd_received);
_WRN_PRINTF ("A file descriptor received, but the request handler is version 0.\n");
}
n = handler (cli, clifd, buff, len_data);
}
if (len_data > sizeof (_request_data_buff))
free (buff);
if (n == SOCKERR_IO)
goto error;
if (req_id == REQID_IAMLIVE && mgClients [cli].has_dirty)
__mg_check_dirty_znode (cli);
return n;
error:
__mg_remove_client (cli, clifd);
return SOCKERR_CLOSED;
}
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