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
  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                 stc_util_update_log_state();
  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_plugin_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         stc_plugin_tether_deinit();
  93         stc_plugin_pcap_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
 136         stc_firewall_init();
 137
 138         stc_plugin_procfs_load_pid();
 139
 140         stc_manager_gdbus_init((gpointer)stc);
 141
 142         STC_LOGI("stc manager initialized");
 143         __STC_LOG_FUNC_EXIT__;
 144         return stc;
 145 }
 146
 147 API stc_s *stc_get_manager(void)
 148 {
 149         return g_stc;
 150 }
 151
 152 void stc_stop_manager(void)
 153 {
 154         if (g_stc && g_stc->main_loop)
 155                 g_main_loop_quit(g_stc->main_loop);
 156 }
 157
 158 int stc_commit_iptables(char *cmd, int *err_num, char **err_str)
 159 {
 160         pid_t pid = 0;
 161         int status = 0;
 162         int ret = 0;
 163         char err_buf[BUF_SIZE_FOR_ERR] = { 0, };
 164         gchar **args = NULL;
 165
 166         if (cmd == NULL) {
 167                 STC_LOGE("Invalid arguments");
 168                 return STC_ERROR_INVALID_PARAMETER;
 169         }
 170
 171         args = g_strsplit_set(cmd, " ", -1);
 172
 173         errno = 0;
 174         pid = fork();
 175
 176         if (pid == 0) {
 177                 errno = 0;
 178
 179                 if (!g_strcmp0(args[1], STC_CMD_INSERT)) {
 180                         STC_LOGE("Invalid arguments");
 181                         g_strfreev(args);
 182                         exit(-1);
 183                 }
 184
 185                 if (execv(args[0], args) == -1) {
 186                         STC_LOGE("Failed to execute [%s]", *err_str);
 187                         g_strfreev(args);
 188                         exit(-1);
 189                 }
 190         } else if (pid > 0) {
 191                 if (waitpid(pid, &status, 0) == -1)
 192                         STC_LOGD("wait pid [%u] status [%d] ", pid, status);
 193
 194                 if (WIFEXITED(status)) {
 195                         ret = WEXITSTATUS(status);
 196                         STC_LOGD("exited, status [%d]", status);
 197                 } else if (WIFSIGNALED(status)) {
 198                         STC_LOGD("killed by signal [%d]", WTERMSIG(status));
 199                 } else if (WIFSTOPPED(status)) {
 200                         STC_LOGD("stopped by signal [%d]", WSTOPSIG(status));
 201                 } else if (WIFCONTINUED(status)) {
 202                         STC_LOGD("continued");
 203                 }
 204
 205                 *err_num = ret;
 206                 *err_str = strerror_r(ret, err_buf, BUF_SIZE_FOR_ERR);
 207                 STC_LOGD("return err_num [%d] err_str [%s]", *err_num, *err_str);
 208
 209                 g_strfreev(args);
 210                 if (ret == 0)
 211                         return STC_ERROR_NONE;
 212                 else
 213                         return STC_ERROR_FAIL;
 214         }
 215
 216         *err_num = errno;
 217         *err_str = strerror_r(errno, err_buf, BUF_SIZE_FOR_ERR);
 218         STC_LOGD("Failed to fork [%d:%s]", *err_num, *err_str);
 219
 220         g_strfreev(args);
 221         return STC_ERROR_FAIL;
 222 }
 223
 224 gint32 main(gint32 argc, gchar *argv[])
 225 {
 226         GMainLoop *main_loop = NULL;
 227         gint32 ret = -1;
 228
 229         STC_LOGI("Smart Traffic Control Manager");
 230
 231 #ifdef TIZEN_GTESTS
 232         setenv("GCOV_PREFIX", "/tmp/daemon", 1);
 233 #endif
 234
 235         if (daemon(0, 0) != 0)
 236                 STC_LOGE("Can't start daemon"); //LCOV_EXCL_LINE
 237
 238         /* Initialize required subsystems */
 239 #if !GLIB_CHECK_VERSION(2, 35, 0)
 240         g_type_init();
 241 #endif
 242
 243         /* Crate the GLIB main loop */
 244         main_loop = g_main_loop_new(NULL, FALSE);
 245
 246         g_stc = __stc_manager_init();
 247         if (!g_stc)
 248                 goto fail;
 249
 250         g_stc->main_loop = main_loop;
 251
 252         /* Run the main loop */
 253         g_main_loop_run(main_loop);
 254
 255         ret = 0;
 256
 257 fail:
 258         __stc_manager_deinit();
 259
 260         if (main_loop)
 261                 g_main_loop_unref(main_loop);
 262
 263         return ret;
 264 }