matt335672
275eaf7683
There are a number of ways the existing transport connect logic in trans_connect could be improved for POSIX compatibility, and also slightly tidied up:- 1) The same socket is re-used for multiple connect attempts following failure which isn't behaviour defined by POSIX.1-2017 (although it works on Linux). 2) An asynchronous connect is started, and then after a short delay connect() is called again on the same socket. POSIX.1-2017 is clear that in this situation EALREADY is returned before the connection is established, but is silent on the behaviour expected when the connection is established. Returning success is an option, but so is returning EISCONN. The current code assumes the connect() call will succeed. 3) The code contains two virtually identical, quite complex loops for TCP and UNIX sockets, differing only in the calls to create a socket and connect it. 4) trans_connect() contains looping and retry logic, but this isn't seen as sufficient by the chansrv connect code in xrdp/xrdp_mm.c and the Xorg connect code in xup/xup.c. Both of these implement their own looping and retry logic on top of the logic in trans_connect(), resulting in slightly unpredictable behaviour with regard to timeouts. 5) A socket number can technically be zero, but in a couple of places this isn't allowed for. This PR attempts to correct the implementation of trans_connect(), and also to simplify the areas it is called from. As part of the PR, the signature of the server_is_term member of the xrdp module interface is changed to match the signature expected by the is_term member of a struct trans. This allows for trans_connect() in xrdp modules to directly access g_is_term() within the main xrdp executable. At the moment this functionality is only used by the xup module.
572 lines
19 KiB
C
572 lines
19 KiB
C
/**
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* xrdp: A Remote Desktop Protocol server.
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*
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* Copyright (C) Jay Sorg 2004-2014
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* main include file
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*/
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/* include other h files */
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#include "arch.h"
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#include "parse.h"
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#include "trans.h"
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#include "list.h"
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#include "list16.h"
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#include "libxrdpinc.h"
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#include "xrdp_constants.h"
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#include "xrdp_types.h"
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#include "defines.h"
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#include "os_calls.h"
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#include "ssl_calls.h"
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#include "thread_calls.h"
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#include "file.h"
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#include "xrdp_client_info.h"
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#include "log.h"
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/* xrdp.c */
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long
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g_xrdp_sync(long (*sync_func)(long param1, long param2), long sync_param1,
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long sync_param2);
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int
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xrdp_child_fork(void);
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int
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g_is_term(void);
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void
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g_set_term(int in_val);
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tbus
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g_get_term_event(void);
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tbus
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g_get_sync_event(void);
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void
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g_process_waiting_function(void);
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/* xrdp_cache.c */
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struct xrdp_cache *
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xrdp_cache_create(struct xrdp_wm *owner, struct xrdp_session *session,
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struct xrdp_client_info *client_info);
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void
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xrdp_cache_delete(struct xrdp_cache *self);
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int
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xrdp_cache_reset(struct xrdp_cache *self,
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struct xrdp_client_info *client_info);
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int
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xrdp_cache_add_bitmap(struct xrdp_cache *self, struct xrdp_bitmap *bitmap,
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int hints);
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int
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xrdp_cache_add_palette(struct xrdp_cache *self, int *palette);
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int
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xrdp_cache_add_char(struct xrdp_cache *self,
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struct xrdp_font_char *font_item);
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int
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xrdp_cache_add_pointer(struct xrdp_cache *self,
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struct xrdp_pointer_item *pointer_item);
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int
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xrdp_cache_add_pointer_static(struct xrdp_cache *self,
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struct xrdp_pointer_item *pointer_item,
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int index);
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int
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xrdp_cache_add_brush(struct xrdp_cache *self,
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char *brush_item_data);
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int
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xrdp_cache_add_os_bitmap(struct xrdp_cache *self, struct xrdp_bitmap *bitmap,
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int rdpindex);
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int
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xrdp_cache_remove_os_bitmap(struct xrdp_cache *self, int rdpindex);
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struct xrdp_os_bitmap_item *
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xrdp_cache_get_os_bitmap(struct xrdp_cache *self, int rdpindex);
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/* xrdp_wm.c */
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struct xrdp_wm *
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xrdp_wm_create(struct xrdp_process *owner,
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struct xrdp_client_info *client_info);
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void
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xrdp_wm_delete(struct xrdp_wm *self);
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int
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xrdp_wm_send_palette(struct xrdp_wm *self);
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int
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xrdp_wm_send_bell(struct xrdp_wm *self);
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int
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xrdp_wm_load_static_colors_plus(struct xrdp_wm *self, char *autorun_name);
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int
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xrdp_wm_load_static_pointers(struct xrdp_wm *self);
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int
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xrdp_wm_init(struct xrdp_wm *self);
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int
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xrdp_wm_send_bitmap(struct xrdp_wm *self, struct xrdp_bitmap *bitmap,
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int x, int y, int cx, int cy);
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int
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xrdp_wm_set_pointer(struct xrdp_wm *self, int cache_idx);
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unsigned int
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xrdp_wm_htoi (const char *ptr);
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int
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xrdp_wm_set_focused(struct xrdp_wm *self, struct xrdp_bitmap *wnd);
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int
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xrdp_wm_get_vis_region(struct xrdp_wm *self, struct xrdp_bitmap *bitmap,
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int x, int y, int cx, int cy,
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struct xrdp_region *region, int clip_children);
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int
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xrdp_wm_mouse_move(struct xrdp_wm *self, int x, int y);
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int
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xrdp_wm_mouse_click(struct xrdp_wm *self, int x, int y, int but, int down);
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int
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xrdp_wm_key(struct xrdp_wm *self, int device_flags, int scan_code);
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int
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xrdp_wm_key_sync(struct xrdp_wm *self, int device_flags, int key_flags);
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int
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xrdp_wm_pu(struct xrdp_wm *self, struct xrdp_bitmap *control);
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int
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xrdp_wm_send_pointer(struct xrdp_wm *self, int cache_idx,
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char *data, char *mask, int x, int y, int bpp);
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int
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xrdp_wm_pointer(struct xrdp_wm *self, char *data, char *mask, int x, int y,
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int bpp);
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int
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callback(intptr_t id, int msg, intptr_t param1, intptr_t param2,
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intptr_t param3, intptr_t param4);
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int
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xrdp_wm_delete_all_children(struct xrdp_wm *self);
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int
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xrdp_wm_show_log(struct xrdp_wm *self);
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int
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xrdp_wm_log_msg(struct xrdp_wm *self, enum logLevels loglevel,
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const char *fmt, ...) printflike(3, 4);
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int
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xrdp_wm_get_wait_objs(struct xrdp_wm *self, tbus *robjs, int *rc,
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tbus *wobjs, int *wc, int *timeout);
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int
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xrdp_wm_check_wait_objs(struct xrdp_wm *self);
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int
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xrdp_wm_set_login_state(struct xrdp_wm *self, enum wm_login_state login_state);
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void
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xrdp_wm_mod_connect_done(struct xrdp_wm *self, int status);
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/* xrdp_process.c */
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struct xrdp_process *
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xrdp_process_create(struct xrdp_listen *owner, tbus done_event);
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void
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xrdp_process_delete(struct xrdp_process *self);
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int
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xrdp_process_main_loop(struct xrdp_process *self);
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/* xrdp_listen.c */
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struct xrdp_listen *
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xrdp_listen_create(void);
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void
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xrdp_listen_delete(struct xrdp_listen *self);
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int
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xrdp_listen_main_loop(struct xrdp_listen *self);
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int
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xrdp_listen_test(struct xrdp_startup_params *startup_params);
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/* xrdp_region.c */
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struct xrdp_region *
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xrdp_region_create(struct xrdp_wm *wm);
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void
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xrdp_region_delete(struct xrdp_region *self);
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int
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xrdp_region_add_rect(struct xrdp_region *self, struct xrdp_rect *rect);
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int
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xrdp_region_subtract_rect(struct xrdp_region *self, struct xrdp_rect *rect);
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int
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xrdp_region_intersect_rect(struct xrdp_region *self, struct xrdp_rect *rect);
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int
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xrdp_region_get_rect(struct xrdp_region *self, int index,
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struct xrdp_rect *rect);
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/* xrdp_bitmap_common.c */
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struct xrdp_bitmap *
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xrdp_bitmap_create(int width, int height, int bpp,
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int type, struct xrdp_wm *wm);
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struct xrdp_bitmap *
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xrdp_bitmap_create_with_data(int width, int height,
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int bpp, char *data,
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struct xrdp_wm *wm);
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void
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xrdp_bitmap_delete(struct xrdp_bitmap *self);
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int
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xrdp_bitmap_resize(struct xrdp_bitmap *self, int width, int height);
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int
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xrdp_bitmap_get_pixel(struct xrdp_bitmap *self, int x, int y);
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int
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xrdp_bitmap_set_pixel(struct xrdp_bitmap *self, int x, int y, int pixel);
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int
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xrdp_bitmap_copy_box(struct xrdp_bitmap *self,
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struct xrdp_bitmap *dest,
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int x, int y, int cx, int cy);
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/* xrdp_bitmap.c */
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struct xrdp_bitmap *
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xrdp_bitmap_get_child_by_id(struct xrdp_bitmap *self, int id);
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int
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xrdp_bitmap_set_focus(struct xrdp_bitmap *self, int focused);
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int
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xrdp_bitmap_hash_crc(struct xrdp_bitmap *self);
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int
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xrdp_bitmap_copy_box_with_crc(struct xrdp_bitmap *self,
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struct xrdp_bitmap *dest,
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int x, int y, int cx, int cy);
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int
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xrdp_bitmap_compare(struct xrdp_bitmap *self,
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struct xrdp_bitmap *b);
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int
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xrdp_bitmap_invalidate(struct xrdp_bitmap *self, struct xrdp_rect *rect);
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int
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xrdp_bitmap_def_proc(struct xrdp_bitmap *self, int msg,
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int param1, int param2);
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int
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xrdp_bitmap_to_screenx(struct xrdp_bitmap *self, int x);
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int
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xrdp_bitmap_to_screeny(struct xrdp_bitmap *self, int y);
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int
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xrdp_bitmap_from_screenx(struct xrdp_bitmap *self, int x);
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int
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xrdp_bitmap_from_screeny(struct xrdp_bitmap *self, int y);
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int
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xrdp_bitmap_get_screen_clip(struct xrdp_bitmap *self,
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struct xrdp_painter *painter,
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struct xrdp_rect *rect,
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int *dx, int *dy);
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/* xrdp_bitmap_load.c */
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/**
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* Loads a bitmap from a file and (optionally) transforms it
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*
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* @param self from rdp_bitmap_create()
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* @param filename Filename to load
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* @param[in] palette For 8-bit conversions. Currently unused
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* @param background Background color for alpha-blending
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* @param transform Transform to apply to the image after loading
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* @param twidth target width if transform != XBLT_NONE
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* @param theight target height if transform != XBLT_NONE
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* @return 0 for success.
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*
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* The background color is only used if the specified image contains
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* an alpha layer. It is in HCOLOR format, and the bpp must correspond to
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* the bpp used to create 'self'.
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*
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* After a successful call, the bitmap is resized to the image file size.
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*
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* If the call is not successful, the bitmap will be in an indeterminate
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* state and should not be used.
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*/
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int
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xrdp_bitmap_load(struct xrdp_bitmap *self, const char *filename,
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const int *palette,
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int background,
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enum xrdp_bitmap_load_transform transform,
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int twidth,
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int theight);
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/* xrdp_painter.c */
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struct xrdp_painter *
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xrdp_painter_create(struct xrdp_wm *wm, struct xrdp_session *session);
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void
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xrdp_painter_delete(struct xrdp_painter *self);
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int
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wm_painter_set_target(struct xrdp_painter *self);
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int
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xrdp_painter_begin_update(struct xrdp_painter *self);
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int
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xrdp_painter_end_update(struct xrdp_painter *self);
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int
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xrdp_painter_font_needed(struct xrdp_painter *self);
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int
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xrdp_painter_set_clip(struct xrdp_painter *self,
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int x, int y, int cx, int cy);
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int
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xrdp_painter_clr_clip(struct xrdp_painter *self);
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int
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xrdp_painter_fill_rect(struct xrdp_painter *self,
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struct xrdp_bitmap *bitmap,
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int x, int y, int cx, int cy);
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int
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xrdp_painter_draw_bitmap(struct xrdp_painter *self,
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struct xrdp_bitmap *bitmap,
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struct xrdp_bitmap *to_draw,
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int x, int y, int cx, int cy);
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int
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xrdp_painter_text_width(struct xrdp_painter *self, const char *text);
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int
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xrdp_painter_text_height(struct xrdp_painter *self, const char *text);
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int
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xrdp_painter_draw_text(struct xrdp_painter *self,
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struct xrdp_bitmap *bitmap,
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int x, int y, const char *text);
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int
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xrdp_painter_draw_text2(struct xrdp_painter *self,
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struct xrdp_bitmap *bitmap,
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int font, int flags, int mixmode,
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int clip_left, int clip_top,
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int clip_right, int clip_bottom,
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int box_left, int box_top,
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int box_right, int box_bottom,
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int x, int y, char *data, int data_len);
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int
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xrdp_painter_copy(struct xrdp_painter *self,
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struct xrdp_bitmap *src,
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struct xrdp_bitmap *dst,
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int x, int y, int cx, int cy,
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int srcx, int srcy);
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int
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xrdp_painter_composite(struct xrdp_painter *self,
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struct xrdp_bitmap *src,
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int srcformat,
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int srcwidth,
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int srcrepeat,
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struct xrdp_bitmap *dst,
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int *srctransform,
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int mskflags,
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struct xrdp_bitmap *msk,
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int mskformat, int mskwidth, int mskrepeat, int op,
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int srcx, int srcy, int mskx, int msky,
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int dstx, int dsty, int width, int height,
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int dstformat);
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int
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xrdp_painter_line(struct xrdp_painter *self,
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struct xrdp_bitmap *bitmap,
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int x1, int y1, int x2, int y2);
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/* xrdp_font.c */
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struct xrdp_font *
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xrdp_font_create(struct xrdp_wm *wm);
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void
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xrdp_font_delete(struct xrdp_font *self);
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int
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xrdp_font_item_compare(struct xrdp_font_char *font1,
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struct xrdp_font_char *font2);
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/* funcs.c */
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int
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rect_contains_pt(struct xrdp_rect *in, int x, int y);
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int
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rect_intersect(struct xrdp_rect *in1, struct xrdp_rect *in2,
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struct xrdp_rect *out);
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int
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rect_contained_by(struct xrdp_rect *in1, int left, int top,
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int right, int bottom);
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int
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check_bounds(struct xrdp_bitmap *b, int *x, int *y, int *cx, int *cy);
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int
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add_char_at(char *text, int text_size, twchar ch, int index);
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int
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remove_char_at(char *text, int text_size, int index);
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int
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set_string(char **in_str, const char *in);
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int
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wchar_repeat(twchar *dest, int dest_size_in_wchars, twchar ch, int repeat);
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/* in lang.c */
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struct xrdp_key_info *
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get_key_info_from_scan_code(int device_flags, int scan_code, int *keys,
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int caps_lock, int num_lock, int scroll_lock,
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struct xrdp_keymap *keymap);
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int
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get_keysym_from_scan_code(int device_flags, int scan_code, int *keys,
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int caps_lock, int num_lock, int scroll_lock,
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struct xrdp_keymap *keymap);
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twchar
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get_char_from_scan_code(int device_flags, int scan_code, int *keys,
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int caps_lock, int num_lock, int scroll_lock,
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struct xrdp_keymap *keymap);
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int
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get_keymaps(int keylayout, struct xrdp_keymap *keymap);
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/* xrdp_login_wnd.c */
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int
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xrdp_login_wnd_create(struct xrdp_wm *self);
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int
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load_xrdp_config(struct xrdp_config *config, const char *xrdp_ini, int bpp);
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/* xrdp_bitmap_compress.c */
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int
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xrdp_bitmap_compress(char *in_data, int width, int height,
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struct stream *s, int bpp, int byte_limit,
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int start_line, struct stream *temp,
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int e);
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/* xrdp_mm.c */
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struct dynamic_monitor_layout
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{
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int flags;
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int left;
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int top;
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int width;
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int height;
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int physical_width;
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int physical_height;
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int orientation;
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int desktop_scale_factor;
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int device_scale_factor;
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};
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int
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xrdp_mm_drdynvc_up(struct xrdp_mm *self);
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int
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xrdp_mm_suppress_output(struct xrdp_mm *self, int suppress,
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int left, int top, int right, int bottom);
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struct xrdp_mm *
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xrdp_mm_create(struct xrdp_wm *owner);
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void
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xrdp_mm_delete(struct xrdp_mm *self);
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void
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xrdp_mm_connect(struct xrdp_mm *self);
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|
int
|
|
xrdp_mm_process_channel_data(struct xrdp_mm *self, tbus param1, tbus param2,
|
|
tbus param3, tbus param4);
|
|
int
|
|
xrdp_mm_get_wait_objs(struct xrdp_mm *self,
|
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tbus *read_objs, int *rcount,
|
|
tbus *write_objs, int *wcount, int *timeout);
|
|
int
|
|
xrdp_mm_check_chan(struct xrdp_mm *self);
|
|
int
|
|
xrdp_mm_check_wait_objs(struct xrdp_mm *self);
|
|
int
|
|
xrdp_mm_frame_ack(struct xrdp_mm *self, int frame_id);
|
|
int
|
|
server_begin_update(struct xrdp_mod *mod);
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|
int
|
|
server_end_update(struct xrdp_mod *mod);
|
|
int
|
|
server_bell_trigger(struct xrdp_mod *mod);
|
|
int
|
|
server_chansrv_in_use(struct xrdp_mod *mod);
|
|
int
|
|
server_fill_rect(struct xrdp_mod *mod, int x, int y, int cx, int cy);
|
|
int
|
|
server_screen_blt(struct xrdp_mod *mod, int x, int y, int cx, int cy,
|
|
int srcx, int srcy);
|
|
int
|
|
server_paint_rect(struct xrdp_mod *mod, int x, int y, int cx, int cy,
|
|
char *data, int width, int height, int srcx, int srcy);
|
|
int
|
|
server_paint_rect_bpp(struct xrdp_mod *mod, int x, int y, int cx, int cy,
|
|
char *data, int width, int height, int srcx, int srcy,
|
|
int bpp);
|
|
int
|
|
server_composite(struct xrdp_mod *mod, int srcidx, int srcformat, int srcwidth,
|
|
int srcrepeat, int *srctransform, int mskflags, int mskidx,
|
|
int mskformat, int mskwidth, int mskrepeat, int op,
|
|
int srcx, int srcy, int mskx, int msky,
|
|
int dstx, int dsty, int width, int height, int dstformat);
|
|
int
|
|
server_paint_rects(struct xrdp_mod *mod, int num_drects, short *drects,
|
|
int num_crects, short *crects,
|
|
char *data, int width, int height,
|
|
int flags, int frame_id);
|
|
int
|
|
server_set_pointer(struct xrdp_mod *mod, int x, int y,
|
|
char *data, char *mask);
|
|
int
|
|
server_set_pointer_ex(struct xrdp_mod *mod, int x, int y,
|
|
char *data, char *mask, int bpp);
|
|
int
|
|
server_palette(struct xrdp_mod *mod, int *palette);
|
|
int
|
|
server_msg(struct xrdp_mod *mod, const char *msg, int code);
|
|
int
|
|
server_set_clip(struct xrdp_mod *mod, int x, int y, int cx, int cy);
|
|
int
|
|
server_reset_clip(struct xrdp_mod *mod);
|
|
int
|
|
server_set_fgcolor(struct xrdp_mod *mod, int fgcolor);
|
|
int
|
|
server_set_bgcolor(struct xrdp_mod *mod, int bgcolor);
|
|
int
|
|
server_set_opcode(struct xrdp_mod *mod, int opcode);
|
|
int
|
|
server_set_mixmode(struct xrdp_mod *mod, int mixmode);
|
|
int
|
|
server_set_brush(struct xrdp_mod *mod, int x_origin, int y_origin,
|
|
int style, char *pattern);
|
|
int
|
|
server_set_pen(struct xrdp_mod *mod, int style, int width);
|
|
int
|
|
server_draw_line(struct xrdp_mod *mod, int x1, int y1, int x2, int y2);
|
|
int
|
|
server_add_char(struct xrdp_mod *mod, int font, int character,
|
|
int offset, int baseline,
|
|
int width, int height, char *data);
|
|
int
|
|
server_draw_text(struct xrdp_mod *mod, int font,
|
|
int flags, int mixmode, int clip_left, int clip_top,
|
|
int clip_right, int clip_bottom,
|
|
int box_left, int box_top,
|
|
int box_right, int box_bottom,
|
|
int x, int y, char *data, int data_len);
|
|
int
|
|
server_reset(struct xrdp_mod *mod, int width, int height, int bpp);
|
|
int
|
|
is_channel_allowed(struct xrdp_wm *wm, int channel_id);
|
|
int
|
|
server_get_channel_count(struct xrdp_mod *mod);
|
|
int
|
|
server_query_channel(struct xrdp_mod *mod, int index, char *channel_name,
|
|
int *channel_flags);
|
|
int
|
|
server_get_channel_id(struct xrdp_mod *mod, const char *name);
|
|
int
|
|
server_send_to_channel(struct xrdp_mod *mod, int channel_id,
|
|
char *data, int data_len,
|
|
int total_data_len, int flags);
|
|
int
|
|
server_create_os_surface(struct xrdp_mod *mod, int id,
|
|
int width, int height);
|
|
int
|
|
server_create_os_surface_bpp(struct xrdp_mod *mod, int id,
|
|
int width, int height, int bpp);
|
|
int
|
|
server_switch_os_surface(struct xrdp_mod *mod, int id);
|
|
int
|
|
server_delete_os_surface(struct xrdp_mod *mod, int id);
|
|
int
|
|
server_paint_rect_os(struct xrdp_mod *mod, int x, int y, int cx, int cy,
|
|
int id, int srcx, int srcy);
|
|
int
|
|
server_set_hints(struct xrdp_mod *mod, int hints, int mask);
|
|
int
|
|
server_window_new_update(struct xrdp_mod *mod, int window_id,
|
|
struct rail_window_state_order *window_state,
|
|
int flags);
|
|
int
|
|
server_window_delete(struct xrdp_mod *mod, int window_id);
|
|
int
|
|
server_window_icon(struct xrdp_mod *mod, int window_id, int cache_entry,
|
|
int cache_id, struct rail_icon_info *icon_info,
|
|
int flags);
|
|
int
|
|
server_window_cached_icon(struct xrdp_mod *mod,
|
|
int window_id, int cache_entry,
|
|
int cache_id, int flags);
|
|
int
|
|
server_notify_new_update(struct xrdp_mod *mod,
|
|
int window_id, int notify_id,
|
|
struct rail_notify_state_order *notify_state,
|
|
int flags);
|
|
int
|
|
server_notify_delete(struct xrdp_mod *mod, int window_id,
|
|
int notify_id);
|
|
int
|
|
server_monitored_desktop(struct xrdp_mod *mod,
|
|
struct rail_monitored_desktop_order *mdo,
|
|
int flags);
|
|
int
|
|
server_add_char_alpha(struct xrdp_mod *mod, int font, int character,
|
|
int offset, int baseline,
|
|
int width, int height, char *data);
|
|
int
|
|
server_session_info(struct xrdp_mod *mod, const char *data, int data_bytes);
|
|
|