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 #ifndef NETD_RESOLV_PARAMS_H 18 #define NETD_RESOLV_PARAMS_H 19 20 #include <stdint.h> 21 22 #define MAXNS 4 // max # name servers we'll track 23 #define MAXDNSRCH 6 // max # domains in search path 24 #define MAXDNSRCHPATH 256 // max length of domain search paths 25 #define MAXNSSAMPLES 64 // max # samples to store per server 26 27 // Per-netid configuration parameters passed from netd to the resolver 28 struct res_params { 29 uint16_t sample_validity; // sample lifetime in s 30 // threshold of success / total samples below which a server is considered broken 31 uint8_t success_threshold; // 0: disable, value / 100 otherwise 32 uint8_t min_samples; // min # samples needed for statistics to be considered meaningful 33 uint8_t max_samples; // max # samples taken into account for statistics 34 int base_timeout_msec; // base query retry timeout (if 0, use RES_TIMEOUT) 35 int retry_count; // number of retries 36 }; 37 38 #define LIBNETD_RESOLV_PUBLIC extern "C" [[gnu::visibility("default")]] 39 40 #endif // NETD_RESOLV_PARAMS_H 41