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-manager-gdbus.h"
  22 #include "stc-db.h"
  23 #include "counter.h"
  24 #include "table-restrictions.h"
  25 #include "helper-cgroup.h"
  26 #include "helper-nfacct-rule.h"
  27 #include "helper-iptables.h"
  28 #include "helper-inotify.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 #include "stc-manager-plugin-tether.h"
  35 #include "stc-manager-plugin-pcap.h"
  36
  37 #define BUF_SIZE_FOR_ERR 100
  38
  39 static stc_s *g_stc = NULL;
  40
  41 static gboolean __validate_ident(const char *ident)
  42 {
  43         unsigned int i;
  44
  45         if (!ident)
  46                 return FALSE;
  47
  48         for (i = 0; i < strlen(ident); ++i)
  49                 if (!g_ascii_isprint(ident[i]))
  50                         return FALSE;
  51
  52         return TRUE;
  53 }
  54
  55 static void __stc_inotify_handler(struct inotify_event *event, const char *ident)
  56 {
  57         if (!ident)
  58                 return;
  59
  60         if (!__validate_ident(ident)) {
  61                 STC_LOGE("Invalid ident [%s]", ident);
  62                 return;
  63         }
  64
  65         if (!g_strcmp0(ident, INFO_CONFIG)) {
  66                 int debug = stc_util_get_config_int(INFO_DEBUGLOG);
  67                 stc_util_set_debuglog(debug);
  68         }
  69 }
  70
  71 static void __stc_manager_deinit(void)
  72 {
  73         __STC_LOG_FUNC_ENTER__;
  74
  75         if (!g_stc) {
  76                 STC_LOGE("Memory for manager structure is not allocated");
  77                 return;
  78         }
  79
  80         stc_monitor_deinit();
  81         stc_deinit_db_guard();
  82         stc_db_deinitialize();
  83
  84         iptables_flush_chains();
  85         iptables_deinit();
  86
  87         stc_manager_gdbus_deinit((gpointer)g_stc);
  88
  89         stc_firewall_deinit();
  90
  91         stc_plugin_appstatus_deinit();
  92         stc_plugin_exception_deinit();
  93         stc_plugin_procfs_deinit();
  94         stc_plugin_tether_deinit();
  95         stc_plugin_pcap_deinit();
  96
  97         inotify_deregister(INFO_STORAGE_DIR);
  98         inotify_deinitialize();
  99
 100         STC_LOGI("stc manager deinitialized");
 101         FREE(g_stc);
 102         __STC_LOG_FUNC_EXIT__;
 103 }
 104
 105 static stc_s *__stc_manager_init(void)
 106 {
 107         __STC_LOG_FUNC_ENTER__;
 108         stc_s *stc;
 109         stc_error_e err = STC_ERROR_NONE;
 110
 111         stc = MALLOC0(stc_s, 1);
 112         if (!stc) {
 113                 STC_LOGE("Failed to allocate memory for manager structure"); //LCOV_EXCL_LINE
 114                 return NULL; //LCOV_EXCL_LINE
 115         }
 116         g_stc = stc;
 117
 118         stc_util_initialize_config();
 119
 120         inotify_initialize();
 121         inotify_register(INFO_STORAGE_DIR, __stc_inotify_handler);
 122
 123 #ifndef TIZEN_TV_EXT
 124         cgroup_set_release_agent(NET_CLS_SUBSYS, NET_RELEASE_AGENT);
 125 #endif
 126
 127         err = stc_db_initialize();
 128         if (err != STC_ERROR_NONE) {
 129                 STC_LOGD("Failed to initialize stc db"); //LCOV_EXCL_LINE
 130                 return NULL; //LCOV_EXCL_LINE
 131         }
 132
 133 #ifndef TIZEN_TV_EXT
 134         stc_plugin_appstatus_init();
 135         stc_plugin_exception_init();
 136         stc_plugin_procfs_init();
 137         stc_plugin_tether_init();
 138         stc_plugin_pcap_init();
 139 #endif
 140
 141         stc_firewall_init();
 142
 143 #ifndef TIZEN_TV_EXT
 144         err = stc_monitor_init();
 145         if (err != STC_ERROR_NONE) {
 146                 STC_LOGD("Failed to initialize stc manager"); //LCOV_EXCL_LINE
 147                 return NULL; //LCOV_EXCL_LINE
 148         }
 149
 150         stc_plugin_procfs_load_pid();
 151 #endif
 152
 153         stc_manager_gdbus_init((gpointer)stc);
 154
 155         STC_LOGI("stc manager initialized");
 156         __STC_LOG_FUNC_EXIT__;
 157         return stc;
 158 }
 159
 160 stc_s *stc_get_manager(void)
 161 {
 162         return g_stc;
 163 }
 164
 165 void stc_stop_manager(void)
 166 {
 167         if (g_stc && g_stc->main_loop)
 168                 g_main_loop_quit(g_stc->main_loop);
 169 }
 170
 171 int stc_commit_iptables(char *cmd, int *err_num, char **err_str)
 172 {
 173         pid_t pid = 0;
 174         int status = 0;
 175         int ret = 0;
 176         char err_buf[BUF_SIZE_FOR_ERR] = { 0, };
 177         gchar **args = NULL;
 178
 179         if (cmd == NULL) {
 180                 STC_LOGE("Invalid arguments");
 181                 return STC_ERROR_INVALID_PARAMETER;
 182         }
 183
 184         args = g_strsplit_set(cmd, " ", -1);
 185
 186         errno = 0;
 187         pid = fork();
 188
 189         if (pid == 0) {
 190                 errno = 0;
 191
 192                 if (!g_strcmp0(args[1], STC_CMD_INSERT)) {
 193                         STC_LOGE("Invalid arguments");
 194                         g_strfreev(args);
 195                         exit(-1);
 196                 }
 197
 198                 if (execv(args[0], args) == -1) {
 199                         STC_LOGE("Failed to execute [%s]", *err_str);
 200                         g_strfreev(args);
 201                         exit(-1);
 202                 }
 203         } else if (pid > 0) {
 204                 if (waitpid(pid, &status, 0) == -1)
 205                         STC_LOGD("wait pid [%u] status [%d] ", pid, status);
 206
 207                 if (WIFEXITED(status)) {
 208                         ret = WEXITSTATUS(status);
 209                         STC_LOGD("exited, status [%d]", status);
 210                 } else if (WIFSIGNALED(status)) {
 211                         STC_LOGD("killed by signal [%d]", WTERMSIG(status));
 212                 } else if (WIFSTOPPED(status)) {
 213                         STC_LOGD("stopped by signal [%d]", WSTOPSIG(status));
 214                 } else if (WIFCONTINUED(status)) {
 215                         STC_LOGD("continued");
 216                 }
 217
 218                 *err_num = ret;
 219                 *err_str = strerror_r(ret, err_buf, BUF_SIZE_FOR_ERR);
 220                 STC_LOGD("return err_num [%d] err_str [%s]", *err_num, *err_str);
 221
 222                 g_strfreev(args);
 223                 if (ret == 0)
 224                         return STC_ERROR_NONE;
 225                 else
 226                         return STC_ERROR_FAIL;
 227         }
 228
 229         *err_num = errno;
 230         *err_str = strerror_r(errno, err_buf, BUF_SIZE_FOR_ERR);
 231         STC_LOGD("Failed to fork [%d:%s]", *err_num, *err_str);
 232
 233         g_strfreev(args);
 234         return STC_ERROR_FAIL;
 235 }
 236
 237 gint32 main(gint32 argc, gchar *argv[])
 238 {
 239         GMainLoop *main_loop = NULL;
 240         gint32 ret = -1;
 241
 242         STC_LOGI("Smart Traffic Control Manager");
 243
 244 #ifdef TIZEN_GTESTS
 245         setenv("GCOV_PREFIX", "/tmp/daemon", 1);
 246 #endif
 247
 248         if (daemon(0, 0) != 0)
 249                 STC_LOGE("Can't start daemon"); //LCOV_EXCL_LINE
 250
 251         /* Initialize required subsystems */
 252 #if !GLIB_CHECK_VERSION(2, 35, 0)
 253         g_type_init();
 254 #endif
 255
 256         /* Crate the GLIB main loop */
 257         main_loop = g_main_loop_new(NULL, FALSE);
 258
 259         g_stc = __stc_manager_init();
 260         if (!g_stc)
 261                 goto fail;
 262
 263         g_stc->main_loop = main_loop;
 264
 265         /* Run the main loop */
 266         g_main_loop_run(main_loop);
 267
 268         ret = 0;
 269
 270 fail:
 271         __stc_manager_deinit();
 272
 273         if (main_loop)
 274                 g_main_loop_unref(main_loop);
 275
 276         return ret;
 277 }