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