1 /* 2 * Copyright (C) 2016 The Android Open Source Project 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 #pragma once 18 19 #include <stdint.h> 20 21 #define MAXNS 4 // max # name servers we'll track 22 #define MAXDNSRCH 6 // max # domains in search path 23 #define MAXDNSRCHPATH 256 // max length of domain search paths 24 #define MAXNSSAMPLES 64 // max # samples to store per server 25 26 // Per-netid configuration parameters passed from netd to the resolver 27 struct res_params { 28 uint16_t sample_validity; // sample lifetime in s 29 // threshold of success / total samples below which a server is considered broken 30 uint8_t success_threshold; // 0: disable, value / 100 otherwise 31 uint8_t min_samples; // min # samples needed for statistics to be considered meaningful 32 uint8_t max_samples; // max # samples taken into account for statistics 33 int base_timeout_msec; // base query retry timeout (if 0, use RES_TIMEOUT) 34 int retry_count; // number of retries 35 }; 36