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635 lines
16 KiB
635 lines
16 KiB
/**
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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 program
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*/
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#include "xrdp.h"
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#include "log.h"
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#if !defined(PACKAGE_VERSION)
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#define PACKAGE_VERSION "???"
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#endif
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#define THREAD_WAITING 100
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static struct xrdp_listen *g_listen = 0;
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static long g_threadid = 0; /* main threadid */
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static long g_sync_mutex = 0;
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static long g_sync1_mutex = 0;
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static tbus g_term_event = 0;
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static tbus g_sync_event = 0;
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/* synchronize stuff */
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static int g_sync_command = 0;
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static long g_sync_result = 0;
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static long g_sync_param1 = 0;
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static long g_sync_param2 = 0;
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static long (*g_sync_func)(long param1, long param2);
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/*****************************************************************************/
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/* This function is used to run a function from the main thread.
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Sync_func is the function pointer that will run from main thread
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The function can have two long in parameters and must return long */
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long APP_CC
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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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{
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long sync_result;
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int sync_command;
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/* If the function is called from the main thread, the function can
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* be called directly. g_threadid= main thread ID*/
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if (tc_threadid_equal(tc_get_threadid(), g_threadid))
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{
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/* this is the main thread, call the function directly */
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/* in fork mode, this always happens too */
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sync_result = sync_func(sync_param1, sync_param2);
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/*g_writeln("g_xrdp_sync processed IN main thread -> continue");*/
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}
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else
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{
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/* All threads have to wait here until the main thread
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* process the function. g_process_waiting_function() is called
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* from the listening thread. g_process_waiting_function() process the function*/
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tc_mutex_lock(g_sync1_mutex);
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tc_mutex_lock(g_sync_mutex);
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g_sync_param1 = sync_param1;
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g_sync_param2 = sync_param2;
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g_sync_func = sync_func;
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/* set a value THREAD_WAITING so the g_process_waiting_function function
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* know if any function must be processed */
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g_sync_command = THREAD_WAITING;
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tc_mutex_unlock(g_sync_mutex);
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/* set this event so that the main thread know if
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* g_process_waiting_function() must be called */
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g_set_wait_obj(g_sync_event);
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do
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{
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g_sleep(100);
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tc_mutex_lock(g_sync_mutex);
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/* load new value from global to see if the g_process_waiting_function()
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* function has processed the function */
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sync_command = g_sync_command;
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sync_result = g_sync_result;
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tc_mutex_unlock(g_sync_mutex);
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}
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while (sync_command != 0); /* loop until g_process_waiting_function()
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* has processed the request */
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tc_mutex_unlock(g_sync1_mutex);
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/*g_writeln("g_xrdp_sync processed BY main thread -> continue");*/
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}
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return sync_result;
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}
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/*****************************************************************************/
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void DEFAULT_CC
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xrdp_shutdown(int sig)
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{
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tbus threadid;
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threadid = tc_get_threadid();
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g_writeln("shutting down");
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g_writeln("signal %d threadid %lld", sig, (long long)threadid);
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if (!g_is_wait_obj_set(g_term_event))
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{
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g_set_wait_obj(g_term_event);
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}
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}
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/*****************************************************************************/
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void DEFAULT_CC
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xrdp_child(int sig)
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{
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g_waitchild();
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}
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/*****************************************************************************/
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/* called in child just after fork */
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int APP_CC
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xrdp_child_fork(void)
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{
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int pid;
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char text[256];
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/* close, don't delete these */
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g_close_wait_obj(g_term_event);
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g_close_wait_obj(g_sync_event);
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pid = g_getpid();
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g_snprintf(text, 255, "xrdp_%8.8x_main_term", pid);
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g_term_event = g_create_wait_obj(text);
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g_snprintf(text, 255, "xrdp_%8.8x_main_sync", pid);
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g_sync_event = g_create_wait_obj(text);
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return 0;
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}
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/*****************************************************************************/
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int DEFAULT_CC
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g_is_term(void)
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{
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return g_is_wait_obj_set(g_term_event);
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}
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/*****************************************************************************/
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void APP_CC
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g_set_term(int in_val)
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{
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if (in_val)
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{
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g_set_wait_obj(g_term_event);
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}
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else
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{
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g_reset_wait_obj(g_term_event);
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}
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}
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/*****************************************************************************/
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tbus APP_CC
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g_get_term_event(void)
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{
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return g_term_event;
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}
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/*****************************************************************************/
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tbus APP_CC
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g_get_sync_event(void)
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{
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return g_sync_event;
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}
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/*****************************************************************************/
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void DEFAULT_CC
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pipe_sig(int sig_num)
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{
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/* do nothing */
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g_writeln("got XRDP SIGPIPE(%d)", sig_num);
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}
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/*****************************************************************************/
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/*Some function must be called from the main thread.
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if g_sync_command==THREAD_WAITING a function is waiting to be processed*/
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void APP_CC
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g_process_waiting_function(void)
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{
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tc_mutex_lock(g_sync_mutex);
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if (g_sync_command != 0)
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{
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if (g_sync_func != 0)
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{
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if (g_sync_command == THREAD_WAITING)
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{
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g_sync_result = g_sync_func(g_sync_param1, g_sync_param2);
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}
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}
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g_sync_command = 0;
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}
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tc_mutex_unlock(g_sync_mutex);
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}
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/*****************************************************************************/
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int APP_CC
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xrdp_process_params(int argc, char **argv,
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struct xrdp_startup_params *startup_params)
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{
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int index;
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char option[128];
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char value[128];
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index = 1;
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while (index < argc)
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{
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g_strncpy(option, argv[index], 127);
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if (index + 1 < argc)
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{
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g_strncpy(value, argv[index + 1], 127);
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}
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else
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{
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value[0] = 0;
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}
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if ((g_strncasecmp(option, "-help", 255)) == 0 ||
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(g_strncasecmp(option, "--help", 255)) == 0 ||
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(g_strncasecmp(option, "-h", 255)) == 0)
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{
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startup_params->help = 1;
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}
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else if ((g_strncasecmp(option, "-kill", 255) == 0) ||
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(g_strncasecmp(option, "--kill", 255) == 0) ||
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(g_strncasecmp(option, "-k", 255) == 0))
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{
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startup_params->kill = 1;
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}
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else if ((g_strncasecmp(option, "-nodaemon", 255) == 0) ||
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(g_strncasecmp(option, "--nodaemon", 255) == 0) ||
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(g_strncasecmp(option, "-nd", 255) == 0) ||
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(g_strncasecmp(option, "--nd", 255) == 0) ||
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(g_strncasecmp(option, "-ns", 255) == 0) ||
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(g_strncasecmp(option, "--ns", 255) == 0))
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{
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startup_params->no_daemon = 1;
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}
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else if ((g_strncasecmp(option, "-v", 255) == 0) ||
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(g_strncasecmp(option, "--version", 255) == 0))
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{
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startup_params->version = 1;
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}
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else if ((g_strncasecmp(option, "-p", 255) == 0) ||
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(g_strncasecmp(option, "--port", 255) == 0))
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{
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index++;
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g_strncpy(startup_params->port, value, 127);
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if (g_strlen(startup_params->port) < 1)
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{
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g_writeln("error processing params, port [%s]", startup_params->port);
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return 1;
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}
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else
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{
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g_writeln("--port parameter found, ini override [%s]",
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startup_params->port);
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}
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}
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else if ((g_strncasecmp(option, "-f", 255) == 0) ||
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(g_strncasecmp(option, "--fork", 255) == 0))
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{
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startup_params->fork = 1;
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g_writeln("--fork parameter found, ini override");
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}
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else
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{
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return 1;
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}
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index++;
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}
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return 0;
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}
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/*****************************************************************************/
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/* Basic sanity checks before any forking */
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int
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xrdp_sanity_check(void)
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{
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int intval = 1;
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int host_be;
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char key_file[256];
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/* check compiled endian with actual endian */
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host_be = !((int)(*(unsigned char *)(&intval)));
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#if defined(B_ENDIAN)
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if (!host_be)
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{
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g_writeln("Not a big endian machine, edit arch.h");
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return 1;
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}
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#endif
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#if defined(L_ENDIAN)
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if (host_be)
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{
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g_writeln("Not a little endian machine, edit arch.h");
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return 1;
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}
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#endif
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/* check long, int and void* sizes */
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if (sizeof(int) != 4)
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{
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g_writeln("unusable int size, must be 4");
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return 1;
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}
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if (sizeof(long) != sizeof(void *))
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{
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g_writeln("long size must match void* size");
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return 1;
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}
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if (sizeof(long) != 4 && sizeof(long) != 8)
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{
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g_writeln("unusable long size, must be 4 or 8");
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return 1;
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}
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if (sizeof(tui64) != 8)
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{
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g_writeln("unusable tui64 size, must be 8");
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return 1;
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}
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g_snprintf(key_file, 255, "%s/rsakeys.ini", XRDP_CFG_PATH);
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if (!g_file_exist(key_file))
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{
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g_writeln("File %s is missing, create it using xrdp-keygen", key_file);
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return 1;
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}
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return 0;
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}
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/*****************************************************************************/
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int DEFAULT_CC
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main(int argc, char **argv)
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{
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int test;
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char cfg_file[256];
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enum logReturns error;
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struct xrdp_startup_params *startup_params;
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int pid;
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int fd;
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int no_daemon;
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char text[256];
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char pid_file[256];
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g_init("xrdp");
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ssl_init();
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for (test = 0; test < argc; test++)
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{
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DEBUG(("Argument %i - %s", test, argv[test]));
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}
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g_snprintf(cfg_file, 255, "%s/xrdp.ini", XRDP_CFG_PATH);
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startup_params = (struct xrdp_startup_params *)
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g_malloc(sizeof(struct xrdp_startup_params), 1);
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if (xrdp_process_params(argc, argv, startup_params) != 0)
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{
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g_writeln("Unknown Parameter");
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g_writeln("xrdp -h for help");
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g_writeln("%s", "");
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g_deinit();
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g_exit(0);
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}
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g_snprintf(pid_file, 255, "%s/xrdp.pid", XRDP_PID_PATH);
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no_daemon = 0;
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if (startup_params->help)
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{
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g_writeln("%s", "");
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g_writeln("xrdp: A Remote Desktop Protocol server.");
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g_writeln("Copyright (C) Jay Sorg 2004-2014");
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g_writeln("See http://www.xrdp.org for more information.");
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g_writeln("%s", "");
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g_writeln("Usage: xrdp [options]");
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g_writeln(" --help: show help");
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g_writeln(" --nodaemon: don't fork into background");
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g_writeln(" --kill: shut down xrdp");
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g_writeln(" --port: tcp listen port");
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g_writeln(" --fork: fork on new connection");
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g_writeln("%s", "");
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g_deinit();
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g_exit(0);
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}
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if (startup_params->version)
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{
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g_writeln("%s", "");
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g_writeln("xrdp: A Remote Desktop Protocol server.");
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g_writeln("Copyright (C) Jay Sorg 2004-2014");
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g_writeln("See http://www.xrdp.org for more information.");
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g_writeln("Version %s", PACKAGE_VERSION);
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g_writeln("%s", "");
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g_deinit();
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g_exit(0);
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}
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if (xrdp_sanity_check() != 0)
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{
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g_writeln("Fatal error occurred, exiting");
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g_deinit();
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g_exit(1);
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}
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if (startup_params->kill)
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{
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g_writeln("stopping xrdp");
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/* read the xrdp.pid file */
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fd = -1;
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if (g_file_exist(pid_file)) /* xrdp.pid */
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{
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fd = g_file_open(pid_file); /* xrdp.pid */
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}
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if (fd == -1)
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{
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g_writeln("cannot open %s, maybe xrdp is not running", pid_file);
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}
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else
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{
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g_memset(text, 0, 32);
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g_file_read(fd, text, 31);
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pid = g_atoi(text);
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g_writeln("stopping process id %d", pid);
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if (pid > 0)
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{
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g_sigterm(pid);
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}
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g_file_close(fd);
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}
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g_deinit();
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g_exit(0);
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}
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/* starting logging subsystem */
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error = log_start(cfg_file, "xrdp");
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if (error != LOG_STARTUP_OK)
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{
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switch (error)
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{
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case LOG_ERROR_MALLOC:
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g_writeln("error on malloc. cannot start logging. quitting.");
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break;
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case LOG_ERROR_FILE_OPEN:
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g_writeln("error opening log file [%s]. quitting.",
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getLogFile(text, 255));
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break;
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default:
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g_writeln("log_start error");
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break;
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}
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g_deinit();
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g_exit(1);
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}
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if (g_file_exist(pid_file)) /* xrdp.pid */
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{
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g_writeln("It looks like xrdp is already running.");
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g_writeln("If not, delete %s and try again.", pid_file);
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g_deinit();
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g_exit(0);
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}
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if (startup_params->no_daemon)
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{
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no_daemon = 1;
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}
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if (!no_daemon)
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{
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/* make sure containing directory exists */
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g_create_path(pid_file);
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/* make sure we can write to pid file */
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fd = g_file_open(pid_file); /* xrdp.pid */
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if (fd == -1)
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{
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g_writeln("running in daemon mode with no access to pid files, quitting");
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g_deinit();
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g_exit(0);
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}
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if (g_file_write(fd, "0", 1) == -1)
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{
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g_writeln("running in daemon mode with no access to pid files, quitting");
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g_deinit();
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g_exit(0);
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}
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g_file_close(fd);
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g_file_delete(pid_file);
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}
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if (!no_daemon)
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{
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/* start of daemonizing code */
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pid = g_fork();
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if (pid == -1)
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{
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g_writeln("problem forking");
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g_deinit();
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g_exit(1);
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}
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if (0 != pid)
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{
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g_writeln("process %d started ok", pid);
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/* exit, this is the main process */
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g_deinit();
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g_exit(0);
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}
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g_sleep(1000);
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/* write the pid to file */
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pid = g_getpid();
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fd = g_file_open(pid_file); /* xrdp.pid */
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if (fd == -1)
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{
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g_writeln("trying to write process id to xrdp.pid");
|
|
g_writeln("problem opening xrdp.pid");
|
|
g_writeln("maybe no rights");
|
|
}
|
|
else
|
|
{
|
|
g_sprintf(text, "%d", pid);
|
|
g_file_write(fd, text, g_strlen(text));
|
|
g_file_close(fd);
|
|
}
|
|
|
|
g_sleep(1000);
|
|
g_file_close(0);
|
|
g_file_close(1);
|
|
g_file_close(2);
|
|
|
|
if (g_file_open("/dev/null") < 0)
|
|
{
|
|
}
|
|
|
|
if (g_file_open("/dev/null") < 0)
|
|
{
|
|
}
|
|
|
|
if (g_file_open("/dev/null") < 0)
|
|
{
|
|
}
|
|
|
|
/* end of daemonizing code */
|
|
}
|
|
|
|
g_threadid = tc_get_threadid();
|
|
g_listen = xrdp_listen_create();
|
|
g_signal_user_interrupt(xrdp_shutdown); /* SIGINT */
|
|
g_signal_pipe(pipe_sig); /* SIGPIPE */
|
|
g_signal_terminate(xrdp_shutdown); /* SIGTERM */
|
|
g_signal_child_stop(xrdp_child); /* SIGCHLD */
|
|
g_sync_mutex = tc_mutex_create();
|
|
g_sync1_mutex = tc_mutex_create();
|
|
pid = g_getpid();
|
|
g_snprintf(text, 255, "xrdp_%8.8x_main_term", pid);
|
|
g_term_event = g_create_wait_obj(text);
|
|
|
|
if (g_term_event == 0)
|
|
{
|
|
g_writeln("error creating g_term_event");
|
|
}
|
|
|
|
g_snprintf(text, 255, "xrdp_%8.8x_main_sync", pid);
|
|
g_sync_event = g_create_wait_obj(text);
|
|
|
|
if (g_sync_event == 0)
|
|
{
|
|
g_writeln("error creating g_sync_event");
|
|
}
|
|
|
|
g_listen->startup_params = startup_params;
|
|
xrdp_listen_main_loop(g_listen);
|
|
xrdp_listen_delete(g_listen);
|
|
tc_mutex_delete(g_sync_mutex);
|
|
tc_mutex_delete(g_sync1_mutex);
|
|
g_delete_wait_obj(g_term_event);
|
|
g_delete_wait_obj(g_sync_event);
|
|
|
|
/* only main process should delete pid file */
|
|
if ((!no_daemon) && (pid == g_getpid()))
|
|
{
|
|
/* delete the xrdp.pid file */
|
|
g_file_delete(pid_file);
|
|
}
|
|
|
|
g_free(startup_params);
|
|
g_deinit();
|
|
return 0;
|
|
}
|