text: /*
   * Copyright 2011 Daniel Drown
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   *
   * clatd.h - main system definitions
   */
  #ifndef __CLATD_H__
  #define __CLATD_H__
  
  #include <linux/if.h>
  #include <linux/if_tun.h>
  
  #define MAXMTU 1500
  #define PACKETLEN (MAXMTU+sizeof(struct tun_pi))
  #define CLATD_VERSION "1.1"
  
  // how frequently (in seconds) to poll for an address change while traffic is passing
  #define INTERFACE_POLL_FREQUENCY 30
  
  // how frequently (in seconds) to poll for an address change while there is no traffic
  #define NO_TRAFFIC_INTERFACE_POLL_FREQUENCY 90
  
  struct tun_data {
    char device6[IFNAMSIZ], device4[IFNAMSIZ];
    int fd6, fd4;
  };
  
  #endif /* __CLATD_H__ */
  