| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 <cstring> |
| #include <string> |
| #include <string_view> |
| #include <unordered_map> |
| #include <atomic> |
| |
| #include "ts/ts.h" |
| #include "sni_limiter.h" |
| #include "utilities.h" |
| #include "ip_reputation.h" |
| #include "lists.h" |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // SNI based limiter selector, this will have one singleton instance. |
| // |
| class SniSelector |
| { |
| using self_type = SniSelector; |
| |
| public: |
| using Limiters = std::unordered_map<std::string, std::tuple<bool, SniRateLimiter *>>; |
| using IPReputations = std::vector<IpReputation::SieveLru *>; |
| using Lists = std::vector<List::IP *>; |
| |
| SniSelector() { Dbg(dbg_ctl, "Creating SNI selector"); } |
| |
| SniSelector(self_type &&) = delete; |
| self_type &operator=(const self_type &) = delete; |
| self_type &operator=(self_type &&) = delete; |
| |
| virtual ~SniSelector() |
| { |
| Dbg(dbg_ctl, "Destroying SNI selector"); |
| if (_queue_action) { |
| TSActionCancel(_queue_action); |
| } |
| |
| if (_queue_cont) { |
| TSContDestroy(_queue_cont); |
| } |
| |
| for (auto &iprep : _reputations) { |
| delete iprep; |
| } |
| |
| for (auto &list : _lists) { |
| delete list; |
| } |
| |
| delete _default; |
| for (auto &limiter : _limiters) { |
| auto &[owner, ptr] = limiter.second; |
| |
| if (owner) { |
| delete ptr; |
| } |
| } |
| } |
| |
| static void |
| swap(self_type *other) |
| { |
| _instance.exchange(other); |
| } |
| |
| static SniSelector * |
| instance() |
| { |
| auto sel = _instance.load(); |
| ++sel->_leases; |
| return sel; |
| } |
| |
| SniSelector * |
| acquire() |
| { |
| ++_leases; |
| return this; |
| } |
| |
| void |
| release() |
| { |
| if (0 == --_leases) { |
| delete this; |
| } |
| } |
| |
| Limiters & |
| limiters() |
| { |
| return _limiters; |
| } |
| |
| SniRateLimiter * |
| findLimiter(const std::string &sni) |
| { |
| auto iter = _limiters.find(sni); |
| |
| return ((iter != _limiters.end()) ? std::get<1>(iter->second) : _default); |
| } |
| |
| void |
| addLimiter(SniRateLimiter *limiter) |
| { |
| _needs_queue_cont |= (limiter->max_queue() > 0); |
| _limiters.emplace(limiter->name(), std::forward_as_tuple(true, limiter)); |
| } |
| |
| void |
| addAlias(std::string alias, SniRateLimiter *limiter) |
| { |
| _limiters.emplace(alias, std::forward_as_tuple(false, limiter)); |
| } |
| |
| const std::string & |
| yamlFile() const |
| { |
| return _yaml_file; |
| } |
| |
| void |
| addIPReputation(IpReputation::SieveLru *iprep) |
| { |
| _reputations.emplace_back(iprep); |
| } |
| |
| IpReputation::SieveLru * |
| findIpRep(const std::string &name) |
| { |
| auto it = std::find_if(_reputations.begin(), _reputations.end(), |
| [&name](const IpReputation::SieveLru *iprep) { return iprep->name() == name; }); |
| |
| if (it != _reputations.end()) { |
| return *it; |
| } |
| |
| return nullptr; |
| } |
| |
| void |
| addList(List::IP *list) |
| { |
| _lists.emplace_back(list); |
| } |
| |
| List::IP * |
| findList(const std::string &name) |
| { |
| auto it = std::find_if(_lists.begin(), _lists.end(), [&name](const List::IP *list) { return list->name() == name; }); |
| |
| if (it != _lists.end()) { |
| return *it; |
| } |
| |
| return nullptr; |
| } |
| |
| void setupQueueCont(); |
| bool yamlParser(const std::string &yaml_file); |
| |
| static void startup(const std::string &yaml_file); |
| |
| private: |
| std::string _yaml_file; |
| bool _needs_queue_cont = false; |
| TSCont _queue_cont = nullptr; // Continuation processing the queue periodically |
| TSAction _queue_action = nullptr; // The action associated with the queue continuation, needed to shut it down |
| Limiters _limiters; // The SNI limiters |
| SniRateLimiter *_default = nullptr; // Default limiter, if any |
| IPReputations _reputations; // IP-Reputation rules |
| Lists _lists; // IP lists (for now, could be generalized later) |
| std::atomic<uint32_t> _leases = 0; // Number of leases we have on the current selector, start with one |
| |
| static std::atomic<self_type *> _instance; // Holds the singleton instance, initialized in the .cc file |
| }; |