text: /*
   * Copyright (c) 2015 Kaprica Security, Inc.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   *
   */
  #include <cstdio.h>
  #include "interface.h"
  
  Interface::Interface(Engine &engine) : d_engine(engine)
  {
  }
  
  Interface::~Interface()
  {
  }
  
  bool Interface::process(unsigned char *data, unsigned int len)
  {
      unsigned int msg;
  
      if (len < 4)
          return true;
  
      msg = *(unsigned int *)data;
      data += 4;
      len -= 4;
  
      switch (msg)
      {
      case MSG_QUIT:
          send_response(RESP_OK);
          return false;
      case MSG_UPDATE:
          if (d_engine.update_rules(data, len))
              return send_response(RESP_OK);
          else
              return send_response(RESP_ERROR);
      case MSG_CHECK:
          if (d_engine.process(data, len))
              // return ERROR if malware
              return send_response(RESP_ERROR);
          else
              return send_response(RESP_OK);
      case MSG_WHITELIST:
          d_engine.whitelist(data, len);
          return send_response(RESP_OK);
      default:
          return send_response(RESP_ERROR);
      }
  }
  
  bool Interface::send_response(unsigned int resp)
  {
      return fwrite(&resp, 4, stdout) == 4;
  }
  