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
  36 #define BUF_SIZE_FOR_ERR 100
  37
  38 static stc_s *g_stc = NULL;
  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 static void __stc_inotify_handler(struct inotify_event *event, const char *ident)
  55 {
  56         if (!ident)
  57                 return;
  58
  59         if (!__validate_ident(ident)) {
  60                 STC_LOGE("Invalid ident [%s]", ident);
  61                 return;
  62         }
  63
  64         if (!g_strcmp0(ident, INFO_CONFIG)) {
  65                 int debug = stc_util_get_config_int(INFO_DEBUGLOG);
  66                 stc_util_set_debuglog(debug);
  67         }
  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_monitor_deinit();
  80         stc_deinit_db_guard();
  81         stc_db_deinitialize();
  82
  83         iptables_flush_chains();
  84         iptables_deinit();
  85
  86         stc_manager_gdbus_deinit((gpointer)g_stc);
  87
  88         stc_firewall_deinit();
  89
  90         stc_plugin_appstatus_deinit();
  91         stc_plugin_exception_deinit();
  92         stc_plugin_procfs_deinit();
  93         stc_plugin_tether_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
 134         stc_firewall_init();
 135
 136         err = stc_monitor_init();
 137         if (err != STC_ERROR_NONE) {
 138                 STC_LOGD("Failed to initialize stc manager"); //LCOV_EXCL_LINE
 139                 return NULL; //LCOV_EXCL_LINE
 140         }
 141
 142         stc_plugin_procfs_load_pid();
 143         stc_manager_gdbus_init((gpointer)stc);
 144
 145         STC_LOGI("stc manager initialized");
 146         __STC_LOG_FUNC_EXIT__;
 147         return stc;
 148 }
 149
 150 stc_s *stc_get_manager(void)
 151 {
 152         return g_stc;
 153 }
 154
 155 void stc_stop_manager(void)
 156 {
 157         if (g_stc && g_stc->main_loop)
 158                 g_main_loop_quit(g_stc->main_loop);
 159 }
 160
 161 int stc_commit_iptables(char *cmd, int *err_num, char **err_str)
 162 {
 163         pid_t pid = 0;
 164         int status = 0;
 165         int ret = 0;
 166         char err_buf[BUF_SIZE_FOR_ERR] = { 0, };
 167         gchar **args = NULL;
 168
 169         if (cmd == NULL) {
 170                 STC_LOGE("Invalid arguments");
 171                 return STC_ERROR_INVALID_PARAMETER;
 172         }
 173
 174         args = g_strsplit_set(cmd, " ", -1);
 175
 176         errno = 0;
 177         pid = fork();
 178
 179         if (pid == 0) {
 180                 errno = 0;
 181
 182                 if (!g_strcmp0(args[1], STC_CMD_INSERT)) {
 183                         STC_LOGE("Invalid arguments");
 184                         g_strfreev(args);
 185                         exit(-1);
 186                 }
 187
 188                 if (execv(args[0], args) == -1) {
 189                         STC_LOGE("Failed to execute [%s]", *err_str);
 190                         g_strfreev(args);
 191                         exit(-1);
 192                 }
 193         } else if (pid > 0) {
 194                 if (waitpid(pid, &status, 0) == -1)
 195                         STC_LOGD("wait pid [%u] status [%d] ", pid, status);
 196
 197                 if (WIFEXITED(status)) {
 198                         ret = WEXITSTATUS(status);
 199                         STC_LOGD("exited, status [%d]", status);
 200                 } else if (WIFSIGNALED(status)) {
 201                         STC_LOGD("killed by signal [%d]", WTERMSIG(status));
 202                 } else if (WIFSTOPPED(status)) {
 203                         STC_LOGD("stopped by signal [%d]", WSTOPSIG(status));
 204                 } else if (WIFCONTINUED(status)) {
 205                         STC_LOGD("continued");
 206                 }
 207
 208                 *err_num = ret;
 209                 *err_str = strerror_r(ret, err_buf, BUF_SIZE_FOR_ERR);
 210                 STC_LOGD("return err_num [%d] err_str [%s]", *err_num, *err_str);
 211
 212                 g_strfreev(args);
 213                 if (ret == 0)
 214                         return STC_ERROR_NONE;
 215                 else
 216                         return STC_ERROR_FAIL;
 217         }
 218
 219         *err_num = errno;
 220         *err_str = strerror_r(errno, err_buf, BUF_SIZE_FOR_ERR);
 221         STC_LOGD("Failed to fork [%d:%s]", *err_num, *err_str);
 222
 223         g_strfreev(args);
 224         return STC_ERROR_FAIL;
 225 }
 226
 227 gint32 main(gint32 argc, gchar *argv[])
 228 {
 229         GMainLoop *main_loop = NULL;
 230         gint32 ret = -1;
 231
 232         STC_LOGI("Smart Traffic Control Manager");
 233
 234 #ifdef TIZEN_GTESTS
 235         setenv("GCOV_PREFIX", "/tmp/daemon", 1);
 236 #endif
 237
 238         if (daemon(0, 0) != 0)
 239                 STC_LOGE("Can't start daemon"); //LCOV_EXCL_LINE
 240
 241         /* Initialize required subsystems */
 242 #if !GLIB_CHECK_VERSION(2, 35, 0)
 243         g_type_init();
 244 #endif
 245
 246         /* Crate the GLIB main loop */
 247         main_loop = g_main_loop_new(NULL, FALSE);
 248
 249         g_stc = __stc_manager_init();
 250         if (!g_stc)
 251                 goto fail;
 252
 253         g_stc->main_loop = main_loop;
 254
 255         /* Run the main loop */
 256         g_main_loop_run(main_loop);
 257
 258         ret = 0;
 259
 260 fail:
 261         __stc_manager_deinit();
 262
 263         if (main_loop)
 264                 g_main_loop_unref(main_loop);
 265
 266         return ret;
 267 }