text: /*
   * Copyright (C) 2016 The Android Open Source Project
   *
   * 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.
   */
  
  #ifndef _RESOLV_PARAMS_H
  #define _RESOLV_PARAMS_H
  #define RESOLV_PARAMS_H
  #define RESOLV_PARAMS_H_
  #define _RESOLV_PARAMS_H_
  
  #include <stdint.h>
  
  /* Hard-coded defines */
  #define MAXNS			4	/* max # name servers we'll track */
  #define MAXDNSRCH		6	/* max # domains in search path */
  #define MAXDNSRCHPATH		256	/* max length of domain search paths */
  #define MAXNSSAMPLES		64	/* max # samples to store per server */
  
  /* Defaults used for initializing __res_params */
  #define SUCCESS_THRESHOLD	75	/* if successes * 100 / total_samples is less than
  					 * this value, the server is considered failing
  					 */
  #define NSSAMPLE_VALIDITY	1800	/* Sample validity in seconds.
  					 * Set to -1 to disable skipping failing
  					 * servers.
  					 */
  
  /* per-netid configuration parameters passed from netd to the resolver */
  struct __res_params {
      uint16_t sample_validity; // sample lifetime in s
      // threshold of success / total samples below which a server is considered broken
      uint8_t success_threshold; // 0: disable, value / 100 otherwise
      uint8_t min_samples; // min # samples needed for statistics to be considered meaningful
      uint8_t max_samples; // max # samples taken into account for statistics
  } __attribute__((__packed__));
  
  #endif // _RESOLV_PARAMS_H
  