1beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai/* 2beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai * Copyright (C) 2016 The Android Open Source Project 3beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai * 4beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai * Licensed under the Apache License, Version 2.0 (the "License"); 5beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai * you may not use this file except in compliance with the License. 6beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai * You may obtain a copy of the License at 7beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai * 8beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai * http://www.apache.org/licenses/LICENSE-2.0 9beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai * 10beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai * Unless required by applicable law or agreed to in writing, software 11beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai * distributed under the License is distributed on an "AS IS" BASIS, 12beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai * See the License for the specific language governing permissions and 14beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai * limitations under the License. 15beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai */ 16beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai 17beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai#ifndef _RESOLVER_STATS_H_ 18beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai#define _RESOLVER_STATS_H_ 19beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai 20beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai#include <time.h> 21beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai 22beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imainamespace android { 23beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imainamespace net { 24beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai 25beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imaistruct ResolverStats { 26beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai // Offsets into the per-server resolver stats as encoded in vector<int32_t> stats of 27beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai // getResolverInfo() of Netd's binder interface. The stats are based on data reported by 28beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai // android_net_res_stats_get_info_for_net(), the usability is calculated by applying 29beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai // android_net_res_stats_get_usable_servers() to this data. 30beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai enum ResolverStatsOffsets { 31beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai STATS_SUCCESSES = 0, // # successes counted for this server 32beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai STATS_ERRORS, // # errors 33beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai STATS_TIMEOUTS, // # timeouts 34beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai STATS_INTERNAL_ERRORS, // # internal errors 35beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai STATS_RTT_AVG, // average round-trip-time 36beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai STATS_LAST_SAMPLE_TIME, // time in s when the last sample was recorded 37beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai STATS_USABLE, // whether the server is considered usable 38beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai STATS_COUNT // total count of integers in the per-server data 39beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai }; 40beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai 41beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai int successes {-1}; 42beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai int errors {-1}; 43beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai int timeouts {-1}; 44beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai int internal_errors {-1}; 45beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai int rtt_avg {-1}; 46beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai time_t last_sample_time {0}; 47beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai bool usable {false}; 48beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai 49beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai // Serialize the resolver stats to the end of |out|. 50beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai void encode(std::vector<int32_t>* out) const; 51beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai 52beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai // Read the serialized resolverstats starting at |in[ofs]|. 53beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai ssize_t decode(const std::vector<int32_t>& in, ssize_t ofs); 54beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai 55beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai // Serialize the contents of |stats| and append them to the end of |out|. Multiple arrays 56beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai // can be written to the same output vector in sequence, however, the corresponding call 57beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai // to decodeAll() will return the combined contents in one vector. 58beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai static void encodeAll(const std::vector<ResolverStats>& stats, std::vector<int32_t>* out); 59beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai 60beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai // Decodes the serialized ResolverStats from |in| and appends them to stats. 61beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai static bool decodeAll(const std::vector<int32_t>& in, std::vector<ResolverStats>* stats); 62beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai}; 63beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai 64beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai 65beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imaiinline void ResolverStats::encode(std::vector<int32_t>* out) const { 66beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai size_t ofs = out->size(); 67beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai out->resize(ofs + STATS_COUNT); 68beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai int32_t* cur = &(*out)[ofs]; 69beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai cur[STATS_SUCCESSES] = successes; 70beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai cur[STATS_ERRORS] = errors; 71beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai cur[STATS_TIMEOUTS] = timeouts; 72beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai cur[STATS_INTERNAL_ERRORS] = internal_errors; 73beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai cur[STATS_RTT_AVG] = rtt_avg; 74beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai cur[STATS_LAST_SAMPLE_TIME] = last_sample_time; 75beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai cur[STATS_USABLE] = usable; 76beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai} 77beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai 78beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai // Read the serialized resolverstats starting at |in[ofs]|. 79beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imaiinline ssize_t ResolverStats::decode(const std::vector<int32_t>& in, ssize_t ofs) { 80beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai if (ofs < 0 || static_cast<size_t>(ofs) + STATS_COUNT > in.size()) { 81beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai return -1; 82beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai } 83beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai const int32_t* cur = &in[ofs]; 84beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai successes = cur[STATS_SUCCESSES]; 85beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai errors = cur[STATS_ERRORS]; 86beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai timeouts = cur[STATS_TIMEOUTS]; 87beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai internal_errors = cur[STATS_INTERNAL_ERRORS]; 88beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai rtt_avg = cur[STATS_RTT_AVG]; 89beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai last_sample_time = cur[STATS_LAST_SAMPLE_TIME]; 90beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai usable = cur[STATS_USABLE]; 91beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai return ofs + STATS_COUNT; 92beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai} 93beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai 94beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imaiinline void ResolverStats::encodeAll(const std::vector<ResolverStats>& stats, 95beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai std::vector<int32_t>* out) { 96beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai for (const auto& s : stats) { 97beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai s.encode(out); 98beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai } 99beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai} 100beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai 101beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai// TODO: Replace with a better representation, e.g. a Parcelable. 102beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imaiinline bool ResolverStats::decodeAll(const std::vector<int32_t>& in, 103beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai std::vector<ResolverStats>* stats) { 104beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai ssize_t size = in.size(); 105beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai if (size % STATS_COUNT) { 106beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai return false; 107beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai } 108beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai stats->resize(size / STATS_COUNT); 109beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai ssize_t ofs = 0; 110beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai for (auto& s : *stats) { 111beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai ofs = s.decode(in, ofs); 112beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai if (ofs < 0) { 113beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai return false; 114beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai } 115beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai } 116beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai return true; 117beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai} 118beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai 119beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai} // namespace net 120beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai} // namespace android 121beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai 122beedec3bc42d6f40a2c83a65522e85b5ff046f79Pierre Imai#endif /* _RESOLVER_STATS_H_ */ 123