706 lines
20 KiB
C
706 lines
20 KiB
C
/*
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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xrdp: A Remote Desktop Protocol server.
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Copyright (C) Jay Sorg 2005-2008
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*/
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/**
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*
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* @file session.c
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* @brief Session management code
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* @author Jay Sorg, Simone Fedele
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*
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*/
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#include "sesman.h"
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#include "libscp_types.h"
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#include <errno.h>
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//#include <time.h>
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extern unsigned char g_fixedkey[8];
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extern struct config_sesman* g_cfg; /* config.h */
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struct session_chain* g_sessions;
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int g_session_count;
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/******************************************************************************/
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struct session_item* DEFAULT_CC
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session_get_bydata(char* name, int width, int height, int bpp)
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{
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struct session_chain* tmp;
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/*THREAD-FIX require chain lock */
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lock_chain_acquire();
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tmp = g_sessions;
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while (tmp != 0)
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{
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if (g_strncmp(name, tmp->item->name, 255) == 0 &&
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tmp->item->width == width &&
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tmp->item->height == height &&
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tmp->item->bpp == bpp)
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{
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/*THREAD-FIX release chain lock */
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lock_chain_release();
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return tmp->item;
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}
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tmp = tmp->next;
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}
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/*THREAD-FIX release chain lock */
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lock_chain_release();
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return 0;
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}
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/******************************************************************************/
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/**
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*
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* @brief checks if there's a server running on a display
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* @param display the display to check
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* @return 0 if there isn't a display running, nonzero otherwise
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*
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*/
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static int DEFAULT_CC
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x_server_running(int display)
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{
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char text[256];
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int x_running;
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int sck;
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g_sprintf(text, "/tmp/.X11-unix/X%d", display);
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x_running = g_file_exist(text);
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if (!x_running)
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{
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g_sprintf(text, "/tmp/.X%d-lock", display);
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x_running = g_file_exist(text);
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}
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if (!x_running) /* check 59xx */
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{
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sck = g_tcp_socket();
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g_sprintf(text, "59%2.2d", display);
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x_running = g_tcp_bind(sck, text);
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g_tcp_close(sck);
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}
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if (!x_running) /* check 60xx */
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{
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sck = g_tcp_socket();
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g_sprintf(text, "60%2.2d", display);
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x_running = g_tcp_bind(sck, text);
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g_tcp_close(sck);
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}
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if (!x_running) /* check 62xx */
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{
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sck = g_tcp_socket();
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g_sprintf(text, "62%2.2d", display);
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x_running = g_tcp_bind(sck, text);
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g_tcp_close(sck);
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}
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return x_running;
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}
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/******************************************************************************/
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static void DEFAULT_CC
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session_start_sessvc(int xpid, int wmpid, long data)
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{
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struct list* sessvc_params;
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char wmpid_str[25];
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char xpid_str[25];
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char exe_path[262];
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int i;
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/* new style waiting for clients */
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g_sprintf(wmpid_str, "%d", wmpid);
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g_sprintf(xpid_str, "%d", xpid);
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log_message(&(g_cfg->log), LOG_LEVEL_INFO,
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"starting xrdp-sessvc - xpid=%s - wmpid=%s",
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xpid_str, wmpid_str);
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sessvc_params = list_create();
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sessvc_params->auto_free = 1;
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/* building parameters */
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g_snprintf(exe_path, 261, "%s/xrdp-sessvc", XRDP_SBIN_PATH);
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list_add_item(sessvc_params, (long)g_strdup(exe_path));
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list_add_item(sessvc_params, (long)g_strdup(xpid_str));
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list_add_item(sessvc_params, (long)g_strdup(wmpid_str));
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list_add_item(sessvc_params, 0); /* mandatory */
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/* executing sessvc */
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g_execvp(exe_path, ((char**)sessvc_params->items));
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/* should not get here */
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log_message(&(g_cfg->log), LOG_LEVEL_ALWAYS,
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"error starting xrdp-sessvc - pid %d - xpid=%s - wmpid=%s",
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g_getpid(), xpid_str, wmpid_str);
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/* logging parameters */
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/* no problem calling strerror for thread safety: other threads
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are blocked */
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log_message(&(g_cfg->log), LOG_LEVEL_DEBUG, "errno: %d, description: %s",
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errno, g_get_strerror());
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log_message(&(g_cfg->log), LOG_LEVEL_DEBUG, "execve parameter list:");
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for (i = 0; i < (sessvc_params->count); i++)
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{
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log_message(&(g_cfg->log), LOG_LEVEL_DEBUG, " argv[%d] = %s", i,
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(char*)list_get_item(sessvc_params, i));
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}
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list_delete(sessvc_params);
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/* keep the old waitpid if some error occurs during execlp */
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g_waitpid(wmpid);
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g_sigterm(xpid);
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g_sigterm(wmpid);
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g_sleep(1000);
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auth_end(data);
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g_exit(0);
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}
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/******************************************************************************/
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int DEFAULT_CC
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session_start(int width, int height, int bpp, char* username, char* password,
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long data, unsigned char type)
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{
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int display;
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int pid;
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int wmpid;
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int xpid;
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int i;
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char geometry[32];
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char depth[32];
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char screen[32];
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char text[256];
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char passwd_file[256];
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char** pp1;
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struct session_chain* temp;
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struct list* xserver_params=0;
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time_t ltime;
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struct tm stime;
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/*THREAD-FIX lock to control g_session_count*/
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lock_chain_acquire();
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/* check to limit concurrent sessions */
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if (g_session_count >= g_cfg->sess.max_sessions)
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{
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/*THREAD-FIX unlock chain*/
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lock_chain_release();
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log_message(&(g_cfg->log), LOG_LEVEL_INFO, "max concurrent session limit exceeded. login \
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for user %s denied", username);
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return 0;
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}
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/*THREAD-FIX unlock chain*/
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lock_chain_release();
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temp = (struct session_chain*)g_malloc(sizeof(struct session_chain), 0);
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if (temp == 0)
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{
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log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "cannot create new chain element - user %s",
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username);
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return 0;
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}
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temp->item = (struct session_item*)g_malloc(sizeof(struct session_item), 0);
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if (temp->item == 0)
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{
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g_free(temp);
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log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "cannot create new session item - user %s",
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username);
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return 0;
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}
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display = 10;
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/*while (x_server_running(display) && display < 50)*/
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/* we search for a free display up to max_sessions */
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/* we should need no more displays than this */
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/* block all the threads running to enable forking */
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scp_lock_fork_request();
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while (x_server_running(display))
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{
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display++;
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if (((display - 10) > g_cfg->sess.max_sessions) || (display >= 50))
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{
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return 0;
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}
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}
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wmpid = 0;
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pid = g_fork();
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if (pid == -1)
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{
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}
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else if (pid == 0) /* child sesman */
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{
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g_unset_signals();
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auth_start_session(data, display);
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g_sprintf(geometry, "%dx%d", width, height);
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g_sprintf(depth, "%d", bpp);
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g_sprintf(screen, ":%d", display);
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wmpid = g_fork();
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if (wmpid == -1)
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{
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}
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else if (wmpid == 0) /* child (child sesman) xserver */
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{
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/* give X a bit to start */
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g_sleep(1000);
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env_set_user(username, 0, display);
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if (x_server_running(display))
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{
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auth_set_env(data);
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/* try to execute user window manager if enabled */
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if (g_cfg->enable_user_wm)
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{
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g_sprintf(text,"%s/%s", g_getenv("HOME"), g_cfg->user_wm);
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if (g_file_exist(text))
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{
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g_execlp3(text, g_cfg->user_wm, 0);
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log_message(&(g_cfg->log), LOG_LEVEL_ALWAYS,"error starting user wm for user %s - pid %d",
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username, g_getpid());
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/* logging parameters */
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/* no problem calling strerror for thread safety: other threads are blocked */
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log_message(&(g_cfg->log), LOG_LEVEL_DEBUG, "errno: %d, description: %s", errno,
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g_get_strerror());
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log_message(&(g_cfg->log), LOG_LEVEL_DEBUG,"execlp3 parameter list:");
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log_message(&(g_cfg->log), LOG_LEVEL_DEBUG, " argv[0] = %s", text);
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log_message(&(g_cfg->log), LOG_LEVEL_DEBUG, " argv[1] = %s", g_cfg->user_wm);
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}
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}
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/* if we're here something happened to g_execlp3
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so we try running the default window manager */
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g_sprintf(text, "%s/%s", XRDP_CFG_PATH, g_cfg->default_wm);
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g_execlp3(text, g_cfg->default_wm, 0);
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log_message(&(g_cfg->log), LOG_LEVEL_ALWAYS,"error starting default wm for user %s - pid %d",
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username, g_getpid());
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/* logging parameters */
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/* no problem calling strerror for thread safety: other threads are blocked */
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log_message(&(g_cfg->log), LOG_LEVEL_DEBUG, "errno: %d, description: %s", errno,
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g_get_strerror());
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log_message(&(g_cfg->log), LOG_LEVEL_DEBUG,"execlp3 parameter list:");
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log_message(&(g_cfg->log), LOG_LEVEL_DEBUG, " argv[0] = %s", text);
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log_message(&(g_cfg->log), LOG_LEVEL_DEBUG, " argv[1] = %s", g_cfg->default_wm);
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/* still a problem starting window manager just start xterm */
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g_execlp3("xterm", "xterm", 0);
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/* should not get here */
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log_message(&(g_cfg->log), LOG_LEVEL_ALWAYS,"error starting xterm for user %s - pid %d",
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username, g_getpid());
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/* logging parameters */
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/* no problem calling strerror for thread safety: other threads are blocked */
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log_message(&(g_cfg->log), LOG_LEVEL_DEBUG, "errno: %d, description: %s", errno, g_get_strerror());
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}
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else
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{
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log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "another Xserver is already active on display %d", display);
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}
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log_message(&(g_cfg->log), LOG_LEVEL_DEBUG,"aborting connection...");
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g_exit(0);
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}
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else /* parent (child sesman) */
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{
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xpid = g_fork();
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if (xpid == -1)
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{
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}
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else if (xpid == 0) /* child */
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{
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env_set_user(username, passwd_file, display);
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env_check_password_file(passwd_file, password);
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if (type == SESMAN_SESSION_TYPE_XVNC)
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{
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xserver_params = list_create();
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xserver_params->auto_free = 1;
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/* these are the must have parameters */
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list_add_item(xserver_params, (long)g_strdup("Xvnc"));
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list_add_item(xserver_params, (long)g_strdup(screen));
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list_add_item(xserver_params, (long)g_strdup("-geometry"));
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list_add_item(xserver_params, (long)g_strdup(geometry));
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list_add_item(xserver_params, (long)g_strdup("-depth"));
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list_add_item(xserver_params, (long)g_strdup(depth));
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list_add_item(xserver_params, (long)g_strdup("-rfbauth"));
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list_add_item(xserver_params, (long)g_strdup(passwd_file));
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/* additional parameters from sesman.ini file */
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//config_read_xserver_params(SESMAN_SESSION_TYPE_XVNC,
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// xserver_params);
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list_append_list_strdup(g_cfg->vnc_params, xserver_params, 0);
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/* make sure it ends with a zero */
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list_add_item(xserver_params, 0);
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pp1 = (char**)xserver_params->items;
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g_execvp("Xvnc", pp1);
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}
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else if (type == SESMAN_SESSION_TYPE_XRDP)
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{
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xserver_params = list_create();
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xserver_params->auto_free = 1;
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/* these are the must have parameters */
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list_add_item(xserver_params, (long)g_strdup("X11rdp"));
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list_add_item(xserver_params, (long)g_strdup(screen));
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list_add_item(xserver_params, (long)g_strdup("-geometry"));
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list_add_item(xserver_params, (long)g_strdup(geometry));
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list_add_item(xserver_params, (long)g_strdup("-depth"));
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list_add_item(xserver_params, (long)g_strdup(depth));
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/* additional parameters from sesman.ini file */
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//config_read_xserver_params(SESMAN_SESSION_TYPE_XRDP,
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// xserver_params);
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list_append_list_strdup(g_cfg->rdp_params, xserver_params, 0);
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/* make sure it ends with a zero */
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list_add_item(xserver_params, 0);
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pp1 = (char**)xserver_params->items;
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g_execvp("X11rdp", pp1);
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}
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else
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{
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log_message(&(g_cfg->log), LOG_LEVEL_ALWAYS, "bad session type - user %s - pid %d",
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username, g_getpid());
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g_exit(1);
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}
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/* should not get here */
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log_message(&(g_cfg->log), LOG_LEVEL_ALWAYS, "error starting X server - user %s - pid %d",
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username, g_getpid());
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/* logging parameters */
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/* no problem calling strerror for thread safety: other threads are blocked */
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log_message(&(g_cfg->log), LOG_LEVEL_DEBUG, "errno: %d, description: %s", errno, g_get_strerror());
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log_message(&(g_cfg->log), LOG_LEVEL_DEBUG, "execve parameter list: %d", (xserver_params)->count);
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for (i=0; i<(xserver_params->count); i++)
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{
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log_message(&(g_cfg->log), LOG_LEVEL_DEBUG, " argv[%d] = %s", i, (char*)list_get_item(xserver_params, i));
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}
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list_delete(xserver_params);
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g_exit(1);
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}
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else /* parent (child sesman)*/
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{
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/* new style waiting for clients */
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session_start_sessvc(xpid, wmpid, data);
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}
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}
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}
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else /* parent sesman process */
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{
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/* let the other threads go on */
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scp_lock_fork_release();
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temp->item->pid = pid;
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temp->item->display = display;
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temp->item->width = width;
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temp->item->height = height;
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temp->item->bpp = bpp;
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temp->item->data = data;
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g_strncpy(temp->item->name, username, 255);
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ltime = g_time1();
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gmtime_r(<ime, &stime);
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temp->item->connect_time.year = (tui16)stime.tm_year;
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temp->item->connect_time.month = (tui8)stime.tm_mon;
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temp->item->connect_time.day = (tui8)stime.tm_mday;
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temp->item->connect_time.hour = (tui8)stime.tm_hour;
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temp->item->connect_time.minute = (tui8)stime.tm_min;
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zero_time(&(temp->item->disconnect_time));
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zero_time(&(temp->item->idle_time));
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temp->item->type=type;
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temp->item->status=SESMAN_SESSION_STATUS_ACTIVE;
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/*THREAD-FIX lock the chain*/
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lock_chain_acquire();
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temp->next=g_sessions;
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g_sessions=temp;
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g_session_count++;
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/*THERAD-FIX free the chain*/
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lock_chain_release();
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g_sleep(5000);
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}
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return display;
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}
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/*
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SESMAN_SESSION_TYPE_XRDP 1
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SESMAN_SESSION_TYPE_XVNC 2
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SESMAN_SESSION_STATUS_ACTIVE 1
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SESMAN_SESSION_STATUS_IDLE 2
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SESMAN_SESSION_STATUS_DISCONNECTED 3
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struct session_item
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{
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char name[256];
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int pid;
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int display;
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int width;
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int height;
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int bpp;
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long data;
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/ *
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unsigned char status;
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unsigned char type;
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* /
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/ *
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time_t connect_time;
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time_t disconnect_time;
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time_t idle_time;
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* /
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};
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struct session_chain
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{
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struct session_chain* next;
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struct session_item* item;
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};
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*/
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/******************************************************************************/
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int DEFAULT_CC
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session_kill(int pid)
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{
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struct session_chain* tmp;
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struct session_chain* prev;
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/*THREAD-FIX require chain lock */
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lock_chain_acquire();
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tmp=g_sessions;
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prev=0;
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while (tmp != 0)
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{
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if (tmp->item == 0)
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{
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log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "session descriptor for pid %d is null!",
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pid);
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|
if (prev == 0)
|
|
{
|
|
/* prev does no exist, so it's the first element - so we set
|
|
g_sessions */
|
|
g_sessions = tmp->next;
|
|
}
|
|
else
|
|
{
|
|
prev->next = tmp->next;
|
|
}
|
|
/*THREAD-FIX release chain lock */
|
|
lock_chain_release();
|
|
return SESMAN_SESSION_KILL_NULLITEM;
|
|
}
|
|
|
|
if (tmp->item->pid == pid)
|
|
{
|
|
/* deleting the session */
|
|
log_message(&(g_cfg->log), LOG_LEVEL_INFO, "session %d - user %s - terminated",
|
|
tmp->item->pid, tmp->item->name);
|
|
g_free(tmp->item);
|
|
if (prev == 0)
|
|
{
|
|
/* prev does no exist, so it's the first element - so we set
|
|
g_sessions */
|
|
g_sessions = tmp->next;
|
|
}
|
|
else
|
|
{
|
|
prev->next = tmp->next;
|
|
}
|
|
g_free(tmp);
|
|
g_session_count--;
|
|
/*THREAD-FIX release chain lock */
|
|
lock_chain_release();
|
|
return SESMAN_SESSION_KILL_OK;
|
|
}
|
|
|
|
/* go on */
|
|
prev = tmp;
|
|
tmp=tmp->next;
|
|
}
|
|
|
|
/*THREAD-FIX release chain lock */
|
|
lock_chain_release();
|
|
return SESMAN_SESSION_KILL_NOTFOUND;
|
|
}
|
|
|
|
/******************************************************************************/
|
|
void DEFAULT_CC
|
|
session_sigkill_all()
|
|
{
|
|
struct session_chain* tmp;
|
|
|
|
/*THREAD-FIX require chain lock */
|
|
lock_chain_acquire();
|
|
|
|
tmp=g_sessions;
|
|
|
|
while (tmp != 0)
|
|
{
|
|
if (tmp->item == 0)
|
|
{
|
|
log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "found null session descriptor!");
|
|
}
|
|
else
|
|
{
|
|
g_sigterm(tmp->item->pid);
|
|
}
|
|
|
|
/* go on */
|
|
tmp=tmp->next;
|
|
}
|
|
|
|
/*THREAD-FIX release chain lock */
|
|
lock_chain_release();
|
|
}
|
|
|
|
/******************************************************************************/
|
|
struct session_item* DEFAULT_CC
|
|
session_get_bypid(int pid)
|
|
{
|
|
struct session_chain* tmp;
|
|
|
|
/*THREAD-FIX require chain lock */
|
|
lock_chain_acquire();
|
|
|
|
tmp = g_sessions;
|
|
while (tmp != 0)
|
|
{
|
|
if (tmp->item == 0)
|
|
{
|
|
log_message(&(g_cfg->log), LOG_LEVEL_ERROR, "session descriptor for pid %d is null!",
|
|
pid);
|
|
/*THREAD-FIX release chain lock */
|
|
lock_chain_release();
|
|
return 0;
|
|
}
|
|
|
|
if (tmp->item->pid == pid)
|
|
{
|
|
/*THREAD-FIX release chain lock */
|
|
lock_chain_release();
|
|
return tmp->item;
|
|
}
|
|
|
|
/* go on */
|
|
tmp=tmp->next;
|
|
}
|
|
|
|
/*THREAD-FIX release chain lock */
|
|
lock_chain_release();
|
|
return 0;
|
|
}
|
|
|
|
/******************************************************************************/
|
|
struct SCP_DISCONNECTED_SESSION*
|
|
session_get_byuser(char* user, int* cnt)
|
|
{
|
|
struct session_chain* tmp;
|
|
struct SCP_DISCONNECTED_SESSION* sess;
|
|
int count;
|
|
int index;
|
|
|
|
count=0;
|
|
|
|
/*THREAD-FIX require chain lock */
|
|
lock_chain_acquire();
|
|
|
|
tmp = g_sessions;
|
|
while (tmp != 0)
|
|
{
|
|
#warning FIXME: we should get only disconnected sessions!
|
|
if (!g_strncasecmp(user, tmp->item->name, 256))
|
|
{
|
|
count++;
|
|
}
|
|
|
|
/* go on */
|
|
tmp=tmp->next;
|
|
}
|
|
|
|
if (count==0)
|
|
{
|
|
(*cnt)=0;
|
|
/*THREAD-FIX release chain lock */
|
|
lock_chain_release();
|
|
return 0;
|
|
}
|
|
|
|
/* malloc() an array of disconnected sessions */
|
|
sess=g_malloc(count * sizeof(struct SCP_DISCONNECTED_SESSION),1);
|
|
if (sess==0)
|
|
{
|
|
(*cnt)=0;
|
|
/*THREAD-FIX release chain lock */
|
|
lock_chain_release();
|
|
return 0;
|
|
}
|
|
|
|
tmp = g_sessions;
|
|
index = 0;
|
|
while (tmp != 0)
|
|
{
|
|
#warning FIXME: we should get only disconnected sessions!
|
|
if (!g_strncasecmp(user, tmp->item->name, 256))
|
|
{
|
|
(sess[index]).SID=tmp->item->pid;
|
|
(sess[index]).type=tmp->item->type;
|
|
(sess[index]).height=tmp->item->height;
|
|
(sess[index]).width=tmp->item->width;
|
|
(sess[index]).bpp=tmp->item->bpp;
|
|
#warning FIXME: setting idle times and such
|
|
/*(sess[index]).connect_time.year = tmp->item->connect_time.year;
|
|
(sess[index]).connect_time.month = tmp->item->connect_time.month;
|
|
(sess[index]).connect_time.day = tmp->item->connect_time.day;
|
|
(sess[index]).connect_time.hour = tmp->item->connect_time.hour;
|
|
(sess[index]).connect_time.minute = tmp->item->connect_time.minute;
|
|
(sess[index]).disconnect_time.year = tmp->item->disconnect_time.year;
|
|
(sess[index]).disconnect_time.month = tmp->item->disconnect_time.month;
|
|
(sess[index]).disconnect_time.day = tmp->item->disconnect_time.day;
|
|
(sess[index]).disconnect_time.hour = tmp->item->disconnect_time.hour;
|
|
(sess[index]).disconnect_time.minute = tmp->item->disconnect_time.minute;
|
|
(sess[index]).idle_time.year = tmp->item->idle_time.year;
|
|
(sess[index]).idle_time.month = tmp->item->idle_time.month;
|
|
(sess[index]).idle_time.day = tmp->item->idle_time.day;
|
|
(sess[index]).idle_time.hour = tmp->item->idle_time.hour;
|
|
(sess[index]).idle_time.minute = tmp->item->idle_time.minute;*/
|
|
(sess[index]).conn_year = tmp->item->connect_time.year;
|
|
(sess[index]).conn_month = tmp->item->connect_time.month;
|
|
(sess[index]).conn_day = tmp->item->connect_time.day;
|
|
(sess[index]).conn_hour = tmp->item->connect_time.hour;
|
|
(sess[index]).conn_minute = tmp->item->connect_time.minute;
|
|
(sess[index]).idle_days = tmp->item->idle_time.day;
|
|
(sess[index]).idle_hours = tmp->item->idle_time.hour;
|
|
(sess[index]).idle_minutes = tmp->item->idle_time.minute;
|
|
|
|
index++;
|
|
}
|
|
|
|
/* go on */
|
|
tmp=tmp->next;
|
|
}
|
|
|
|
/*THREAD-FIX release chain lock */
|
|
lock_chain_release();
|
|
(*cnt)=count;
|
|
return sess;
|
|
}
|
|
|