You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
64 lines
2.5 KiB
64 lines
2.5 KiB
/*
|
|
* 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.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <stdbool.h>
|
|
#include <stdint.h>
|
|
#include <sys/socket.h>
|
|
#include <time.h>
|
|
|
|
#include "params.h"
|
|
|
|
#define RCODE_INTERNAL_ERROR 254
|
|
#define RCODE_TIMEOUT 255
|
|
|
|
struct res_sample {
|
|
time_t at; // time in s at which the sample was recorded
|
|
uint16_t rtt; // round-trip time in ms
|
|
uint8_t rcode; // the DNS rcode or RCODE_XXX defined above
|
|
};
|
|
|
|
// Resolver reachability statistics and run-time parameters.
|
|
struct res_stats {
|
|
// Stats of the last <sample_count> queries.
|
|
res_sample samples[MAXNSSAMPLES];
|
|
// The number of samples stored.
|
|
uint8_t sample_count;
|
|
// The next sample to modify.
|
|
uint8_t sample_next;
|
|
};
|
|
|
|
// Aggregates the reachability statistics for the given server based on on the stored samples.
|
|
void android_net_res_stats_aggregate(res_stats* stats, int* successes, int* errors, int* timeouts,
|
|
int* internal_errors, int* rtt_avg, time_t* last_sample_time);
|
|
|
|
int android_net_res_stats_get_info_for_net(unsigned netid, int* nscount,
|
|
sockaddr_storage servers[MAXNS], int* dcount,
|
|
char domains[MAXDNSRCH][MAXDNSRCHPATH],
|
|
res_params* params, res_stats stats[MAXNS],
|
|
int* wait_for_pending_req_timeout_count);
|
|
|
|
// Returns an array of bools indicating which servers are considered good
|
|
int android_net_res_stats_get_usable_servers(const res_params* params, res_stats stats[],
|
|
int nscount, bool valid_servers[]);
|
|
|
|
// Calculate the round-trip-time from start time t0 and end time t1.
|
|
int res_stats_calculate_rtt(const timespec* t1, const timespec* t0);
|
|
|
|
// Create a sample for calculating server reachability statistics.
|
|
void res_stats_set_sample(res_sample* sample, time_t now, int rcode, int rtt);
|