src/stc-manager.c

   1 /*
   2  * Copyright (c) 2016 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include <signal.h>
  18 #include <errno.h>
  19 #include <sys/wait.h>
  20 #include "stc-manager.h"
  21 #include "stc-emulator.h"
  22 #include "stc-manager-gdbus.h"
  23 #include "stc-db.h"
  24 #include "counter.h"
  25 #include "table-restrictions.h"
  26 #include "helper-cgroup.h"
  27 #include "helper-nfacct-rule.h"
  28 #include "helper-iptables.h"
  29 #include "stc-monitor.h"
  30 #include "stc-firewall.h"
  31 #include "stc-manager-plugin-appstatus.h"
  32 #include "stc-manager-plugin-exception.h"
  33 #include "stc-manager-plugin-procfs.h"
  34
  35 #define BUF_SIZE_FOR_ERR 100
  36
  37 static stc_s *g_stc = NULL;
  38
  39 /*
  40 static gboolean __validate_ident(const char *ident)
  41 {
  42         unsigned int i;
  43
  44         if (!ident)
  45                 return FALSE;
  46
  47         for (i = 0; i < strlen(ident); ++i)
  48                 if (!g_ascii_isprint(ident[i]))
  49                         return FALSE;
  50
  51         return TRUE;
  52 }
  53 */
  54
  55 static void __stc_manager_deinit(void)
  56 {
  57         __STC_LOG_FUNC_ENTER__;
  58
  59         if (!g_stc) {
  60                 STC_LOGE("Memory for manager structure is not allocated");
  61                 return;
  62         }
  63
  64         stc_monitor_deinit();
  65         stc_deinit_db_guard();
  66         stc_db_deinitialize();
  67
  68         iptables_flush_chains();
  69         iptables_deinit();
  70
  71         stc_manager_gdbus_deinit((gpointer)g_stc);
  72
  73         stc_firewall_deinit();
  74
  75         stc_plugin_appstatus_deinit();
  76         stc_plugin_exception_deinit();
  77         stc_plugin_procfs_deinit();
  78
  79         STC_LOGI("stc manager deinitialized");
  80         FREE(g_stc);
  81         __STC_LOG_FUNC_EXIT__;
  82 }
  83
  84 static stc_s *__stc_manager_init(void)
  85 {
  86         __STC_LOG_FUNC_ENTER__;
  87         stc_s *stc;
  88         stc_error_e err = STC_ERROR_NONE;
  89
  90         stc = MALLOC0(stc_s, 1);
  91         if (!stc) {
  92                 STC_LOGE("Failed to allocate memory for manager structure"); //LCOV_EXCL_LINE
  93                 return NULL; //LCOV_EXCL_LINE
  94         }
  95         g_stc = stc;
  96
  97         stc_util_initialize_config();
  98
  99         cgroup_set_release_agent(NET_CLS_SUBSYS, NET_RELEASE_AGENT);
 100
 101         EXEC(STC_ERROR_NONE, stc_db_initialize());
 102
 103         stc_plugin_appstatus_init();
 104         stc_plugin_exception_init();
 105         stc_plugin_procfs_init();
 106
 107         stc_firewall_init();
 108
 109         err = stc_monitor_init();
 110         if (err != STC_ERROR_NONE)
 111                 goto handle_error;
 112
 113         stc_manager_gdbus_init((gpointer)stc);
 114
 115         STC_LOGI("stc manager initialized");
 116         __STC_LOG_FUNC_EXIT__;
 117         return stc;
 118
 119 handle_error:
 120         STC_LOGD("Failed to initialize stc manager"); //LCOV_EXCL_LINE
 121         __stc_manager_deinit(); //LCOV_EXCL_LINE
 122         return NULL; //LCOV_EXCL_LINE
 123 }
 124
 125 stc_s *stc_get_manager(void)
 126 {
 127         return g_stc;
 128 }
 129
 130 void stc_stop_manager(void)
 131 {
 132         if (g_stc && g_stc->main_loop)
 133                 g_main_loop_quit(g_stc->main_loop);
 134 }
 135
 136 int stc_commit_iptables(char *cmd, int *err_num, char **err_str)
 137 {
 138         pid_t pid = 0;
 139         int status = 0;
 140         int ret = 0;
 141         char err_buf[BUF_SIZE_FOR_ERR] = { 0, };
 142         gchar **args = NULL;
 143
 144         if (cmd == NULL) {
 145                 STC_LOGE("Invalid arguments");
 146                 return STC_ERROR_INVALID_PARAMETER;
 147         }
 148
 149         args = g_strsplit_set(cmd, " ", -1);
 150
 151         errno = 0;
 152         pid = fork();
 153
 154         if (pid == 0) {
 155                 errno = 0;
 156                 if (execv(args[0], args) == -1) {
 157                         STC_LOGE("Failed to execute [%s]", err_str);
 158                         g_strfreev(args);
 159                         exit(-1);
 160                 }
 161         } else if (pid > 0) {
 162                 if (waitpid(pid, &status, 0) == -1)
 163                         STC_LOGD("wait pid [%u] status [%d] ", pid, status);
 164
 165                 if (WIFEXITED(status)) {
 166                         ret = WEXITSTATUS(status);
 167                         STC_LOGD("exited, status [%d]", status);
 168                 } else if (WIFSIGNALED(status)) {
 169                         STC_LOGD("killed by signal [%d]", WTERMSIG(status));
 170                 } else if (WIFSTOPPED(status)) {
 171                         STC_LOGD("stopped by signal [%d]", WSTOPSIG(status));
 172                 } else if (WIFCONTINUED(status)) {
 173                         STC_LOGD("continued");
 174                 }
 175
 176                 *err_num = ret;
 177                 *err_str = strerror_r(ret, err_buf, BUF_SIZE_FOR_ERR);
 178                 STC_LOGD("return err_num [%d] err_str [%s]", *err_num, *err_str);
 179
 180                 g_strfreev(args);
 181                 if (ret == 0)
 182                         return STC_ERROR_NONE;
 183                 else
 184                         return STC_ERROR_FAIL;
 185         }
 186
 187         *err_num = errno;
 188         *err_str = strerror_r(errno, err_buf, BUF_SIZE_FOR_ERR);
 189         STC_LOGD("Failed to fork [%d:%s]", *err_num, *err_str);
 190
 191         g_strfreev(args);
 192         return STC_ERROR_FAIL;
 193 }
 194
 195 gint32 main(gint32 argc, gchar *argv[])
 196 {
 197         GMainLoop *main_loop = NULL;
 198         gint32 ret = -1;
 199
 200         STC_LOGI("Smart Traffic Control Manager");
 201
 202 #ifdef TIZEN_GTESTS
 203         setenv("GCOV_PREFIX", "/tmp/daemon", 1);
 204 #endif
 205
 206         if (daemon(0, 0) != 0)
 207                 STC_LOGE("Can't start daemon"); //LCOV_EXCL_LINE
 208
 209         /* Initialize required subsystems */
 210 #if !GLIB_CHECK_VERSION(2, 35, 0)
 211         g_type_init();
 212 #endif
 213
 214         /* Crate the GLIB main loop */
 215         main_loop = g_main_loop_new(NULL, FALSE);
 216
 217         stc_emulator_check_environment();
 218         if (stc_emulator_is_emulated() == FALSE) {
 219                 g_stc = __stc_manager_init();
 220                 if (!g_stc)
 221                         goto fail;
 222                 g_stc->main_loop = main_loop;
 223         }
 224
 225         /* Run the main loop */
 226         g_main_loop_run(main_loop);
 227
 228         ret = 0;
 229
 230 fail:
 231         if (stc_emulator_is_emulated() == FALSE)
 232                 __stc_manager_deinit();
 233
 234         if (main_loop)
 235                 g_main_loop_unref(main_loop);
 236
 237         return ret;
 238 }