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add init/fini preloaded actions

    1: #include "global.h"
    2: 
    3: 
    4: extern const char sql_schema[];
    5: 
    6: 
    7: /*
    8:  * mqtt_rtlm_log() Log database connection message
    9:  *
   10:  * @fmt = format string
   11:  * @... = argument list
   12:  * return: none
   13:  */
   14: static void
   15: mqtt_rtlm_log(const char *fmt, ...)
   16: {
   17: 	va_list lst;
   18: 
   19: 	va_start(lst, fmt);
   20: 	vsyslog(LOG_ERR, fmt, lst);
   21: 	va_end(lst);
   22: }
   23: #define MQTT_RTLM_LOG(_sql)	(assert((_sql)), mqtt_rtlm_log("Error:: %s(%d) SQL #%d - %s", \
   24: 					__func__, __LINE__, \
   25: 					sqlite3_errcode((_sql)), sqlite3_errmsg((_sql))))
   26: 
   27: /* library pre-loaded actions */
   28: void
   29: _init()
   30: {
   31: 	sqlite3_initialize();
   32: }
   33: 
   34: void
   35: _fini()
   36: {
   37: 	sqlite3_shutdown();
   38: }
   39: 
   40: 
   41: /*
   42:  * mqtt_rtlm_open() Open database connection
   43:  *
   44:  * @cfg = loaded config
   45:  * return: NULL error or SQL handle
   46:  */
   47: sqlite3 *
   48: mqtt_rtlm_open(cfg_root_t *cfg)
   49: {
   50: 	sqlite3 *sql = NULL;
   51: 	const char *str = NULL;
   52: 
   53: 	if (!cfg)
   54: 		return NULL;
   55: 
   56: 	str = (const char*) cfg_getAttribute(cfg, "mqtt_acc", "name");
   57: 	if (!str) {
   58: 		mqtt_rtlm_log("Error:: Unknown database name ...\n");
   59: 		return NULL;
   60: 	}
   61: 
   62: 	if (sqlite3_open_v2(str, &sql, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, NULL)) {
   63: 		MQTT_RTLM_LOG(sql);
   64: 		sqlite3_close(sql);
   65: 		return NULL;
   66: 	}
   67: 
   68: 	if (sqlite3_exec(sql, sql_schema, NULL, NULL, NULL)) {
   69: 		MQTT_RTLM_LOG(sql);
   70: 		sqlite3_close(sql);
   71: 		return NULL;
   72: 	}
   73: 
   74: 	return sql;
   75: }
   76: 
   77: /*
   78:  * mqtt_rtlm_close() Close database connection
   79:  *
   80:  * @sql = SQL handle
   81:  * return: none
   82:  */
   83: void
   84: mqtt_rtlm_close(sqlite3 *sql)
   85: {
   86: 	sqlite3_close(sql);
   87: }
   88: 
   89: /*
   90:  * mqtt_rtlm_login() Verify login account
   91:  *
   92:  * @cfg = loaded config
   93:  * @sql = SQL handle
   94:  * @user = username
   95:  * @pass = password
   96:  * return: -1 error, 0 ALLOW and 1 REJECT
   97:  */
   98: int
   99: mqtt_rtlm_login(cfg_root_t *cfg, sqlite3 *sql, const char *user, const char *pass)
  100: {
  101: 	/* insert into Users values (NULL, "", "", 1, strftime('%s','now')); */
  102: 	int ret = 0;
  103: 	sqlite3_stmt *stmt;
  104: 	char *str, szStmt[BUFSIZ] = { 0 };
  105: 
  106: 	if (!sql)
  107: 		return -1;
  108: 
  109: 	str = (char*) cfg_getAttribute(cfg, "mqtt_acc", "tbl_users");
  110: 	if (!str) {
  111: 		mqtt_rtlm_log("Error:: not found users table name");
  112: 		return -1;
  113: 	}
  114: 	snprintf(szStmt, sizeof szStmt, "SELECT DISTINCT Username, Password, Access FROM %s "
  115: 			"WHERE Username = '%s' AND Password = '%s' AND Access > 0;", str, user, pass);
  116: 
  117: 	if (sqlite3_prepare_v2(sql, szStmt, strlen(szStmt), &stmt, NULL)) {
  118: 		MQTT_RTLM_LOG(sql);
  119: 		return -1;
  120: 	}
  121: 	while (sqlite3_step(stmt) == SQLITE_ROW) {
  122: 		if (sqlite3_data_count(stmt) < 1)
  123: 			ret = 0;
  124: 		else
  125: 			ret = 1;
  126: 		break;
  127: 	}
  128: 	sqlite3_finalize(stmt);
  129: 
  130: 	return ret;
  131: }