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-firewall.h"
  30 #include "stc-manager-plugin-appstatus.h"
  31 #include "stc-manager-plugin-exception.h"
  32 #include "stc-manager-plugin-procfs.h"
  33 #include "stc-manager-plugin-tether.h"
  34 #include "stc-manager-plugin-pcap.h"
  35 #include "stc-manager-plugin-monitor.h"
  36 #include "stc-manager-plugin-firewall.h"
  37
  38 #define BUF_SIZE_FOR_ERR 100
  39
  40 static stc_s *g_stc = NULL;
  41
  42 static gboolean __validate_ident(const char *ident)
  43 {
  44         unsigned int i;
  45
  46         if (!ident)
  47                 return FALSE;
  48
  49         for (i = 0; i < strlen(ident); ++i)
  50                 if (!g_ascii_isprint(ident[i]))
  51                         return FALSE;
  52
  53         return TRUE;
  54 }
  55
  56 static void __stc_inotify_handler(struct inotify_event *event, const char *ident)
  57 {
  58         if (!ident)
  59                 return;
  60
  61         if (!__validate_ident(ident)) {
  62                 STC_LOGE("Invalid ident [%s]", ident);
  63                 return;
  64         }
  65
  66         if (!g_strcmp0(ident, INFO_CONFIG))
  67                 stc_util_update_log_state();
  68 }
  69
  70 static void __stc_manager_deinit(void)
  71 {
  72         __STC_LOG_FUNC_ENTER__;
  73
  74         if (!g_stc) {
  75                 STC_LOGE("Memory for manager structure is not allocated");
  76                 return;
  77         }
  78
  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_plugin_appstatus_deinit();
  88         stc_plugin_exception_deinit();
  89         stc_plugin_procfs_deinit();
  90         stc_plugin_tether_deinit();
  91         stc_plugin_pcap_deinit();
  92         stc_plugin_monitor_deinit();
  93         stc_plugin_firewall_deinit();
  94
  95         inotify_deregister(INFO_STORAGE_DIR);
  96         inotify_deinitialize();
  97
  98         STC_LOGI("stc manager deinitialized");
  99         FREE(g_stc);
 100         __STC_LOG_FUNC_EXIT__;
 101 }
 102
 103 static stc_s *__stc_manager_init(void)
 104 {
 105         __STC_LOG_FUNC_ENTER__;
 106         stc_s *stc;
 107         stc_error_e err = STC_ERROR_NONE;
 108
 109         stc = MALLOC0(stc_s, 1);
 110         if (!stc) {
 111                 STC_LOGE("Failed to allocate memory for manager structure"); //LCOV_EXCL_LINE
 112                 return NULL; //LCOV_EXCL_LINE
 113         }
 114         g_stc = stc;
 115
 116         stc_util_initialize_config();
 117
 118         inotify_initialize();
 119         inotify_register(INFO_STORAGE_DIR, __stc_inotify_handler);
 120
 121         cgroup_set_release_agent(NET_CLS_SUBSYS, NET_RELEASE_AGENT);
 122
 123         err = stc_db_initialize();
 124         if (err != STC_ERROR_NONE) {
 125                 STC_LOGD("Failed to initialize stc db"); //LCOV_EXCL_LINE
 126                 return NULL; //LCOV_EXCL_LINE
 127         }
 128
 129         stc_plugin_appstatus_init();
 130         stc_plugin_exception_init();
 131         stc_plugin_procfs_init();
 132         stc_plugin_tether_init();
 133         stc_plugin_pcap_init();
 134         stc_plugin_monitor_init();
 135         stc_plugin_firewall_init();
 136
 137         stc_plugin_procfs_load_pid();
 138
 139         stc_manager_gdbus_init((gpointer)stc);
 140
 141         STC_LOGI("stc manager initialized");
 142         __STC_LOG_FUNC_EXIT__;
 143         return stc;
 144 }
 145
 146 API 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
 178                 if (!g_strcmp0(args[1], STC_CMD_INSERT)) {
 179                         STC_LOGE("Invalid arguments");
 180                         g_strfreev(args);
 181                         exit(-1);
 182                 }
 183
 184                 if (execv(args[0], args) == -1) {
 185                         STC_LOGE("Failed to execute [%s]", *err_str);
 186                         g_strfreev(args);
 187                         exit(-1);
 188                 }
 189         } else if (pid > 0) {
 190                 if (waitpid(pid, &status, 0) == -1)
 191                         STC_LOGD("wait pid [%u] status [%d] ", pid, status);
 192
 193                 if (WIFEXITED(status)) {
 194                         ret = WEXITSTATUS(status);
 195                         STC_LOGD("exited, status [%d]", status);
 196                 } else if (WIFSIGNALED(status)) {
 197                         STC_LOGD("killed by signal [%d]", WTERMSIG(status));
 198                 } else if (WIFSTOPPED(status)) {
 199                         STC_LOGD("stopped by signal [%d]", WSTOPSIG(status));
 200                 } else if (WIFCONTINUED(status)) {
 201                         STC_LOGD("continued");
 202                 }
 203
 204                 *err_num = ret;
 205                 *err_str = strerror_r(ret, err_buf, BUF_SIZE_FOR_ERR);
 206                 STC_LOGD("return err_num [%d] err_str [%s]", *err_num, *err_str);
 207
 208                 g_strfreev(args);
 209                 if (ret == 0)
 210                         return STC_ERROR_NONE;
 211                 else
 212                         return STC_ERROR_FAIL;
 213         }
 214
 215         *err_num = errno;
 216         *err_str = strerror_r(errno, err_buf, BUF_SIZE_FOR_ERR);
 217         STC_LOGD("Failed to fork [%d:%s]", *err_num, *err_str);
 218
 219         g_strfreev(args);
 220         return STC_ERROR_FAIL;
 221 }
 222
 223 gint32 main(gint32 argc, gchar *argv[])
 224 {
 225         GMainLoop *main_loop = NULL;
 226         gint32 ret = -1;
 227
 228         STC_LOGI("Smart Traffic Control Manager");
 229
 230 #ifdef TIZEN_GTESTS
 231         setenv("GCOV_PREFIX", "/tmp/daemon", 1);
 232 #endif
 233
 234         if (daemon(0, 0) != 0)
 235                 STC_LOGE("Can't start daemon"); //LCOV_EXCL_LINE
 236
 237         /* Initialize required subsystems */
 238 #if !GLIB_CHECK_VERSION(2, 35, 0)
 239         g_type_init();
 240 #endif
 241
 242         /* Crate the GLIB main loop */
 243         main_loop = g_main_loop_new(NULL, FALSE);
 244
 245         g_stc = __stc_manager_init();
 246         if (!g_stc)
 247                 goto fail;
 248
 249         g_stc->main_loop = main_loop;
 250
 251         /* Run the main loop */
 252         g_main_loop_run(main_loop);
 253
 254         ret = 0;
 255
 256 fail:
 257         __stc_manager_deinit();
 258
 259         if (main_loop)
 260                 g_main_loop_unref(main_loop);
 261
 262         return ret;
 263 }