Line data    Source code

       1             : /*
       2             :  *  Copyright (C) 2004-2026 Savoir-faire Linux Inc.
       3             :  *
       4             :  *  This program is free software: you can redistribute it and/or modify
       5             :  *  it under the terms of the GNU General Public License as published by
       6             :  *  the Free Software Foundation, either version 3 of the License, or
       7             :  *  (at your option) any later version.
       8             :  *
       9             :  *  This program is distributed in the hope that it will be useful,
      10             :  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
      11             :  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
      12             :  *  GNU General Public License for more details.
      13             :  *
      14             :  *  You should have received a copy of the GNU General Public License
      15             :  *  along with this program. If not, see <https://www.gnu.org/licenses/>.
      16             :  */
      17             : #pragma once
      18             : 
      19             : #include "noncopyable.h"
      20             : 
      21             : #include <asio/io_context.hpp>
      22             : #include <asio/steady_timer.hpp>
      23             : 
      24             : #include <functional>
      25             : #include <map>
      26             : #include <set>
      27             : #include <string>
      28             : #include <mutex>
      29             : #include <memory>
      30             : #include <thread>
      31             : #include <filesystem>
      32             : 
      33             : namespace dht {
      34             : class Executor;
      35             : namespace crypto {
      36             : struct PublicKey;
      37             : }
      38             : namespace http {
      39             : class Request;
      40             : struct Response;
      41             : class Resolver;
      42             : } // namespace http
      43             : namespace log {
      44             : struct Logger;
      45             : }
      46             : using Logger = log::Logger;
      47             : } // namespace dht
      48             : 
      49             : namespace jami {
      50             : 
      51             : class NameDirectory
      52             : {
      53             : public:
      54             :     enum class Response : int { found = 0, invalidResponse, notFound, error };
      55             :     enum class RegistrationResponse : int {
      56             :         success = 0,
      57             :         invalidName,
      58             :         invalidCredentials,
      59             :         alreadyTaken,
      60             :         error,
      61             :         incompleteRequest,
      62             :         signatureVerificationFailed,
      63             :         unsupported
      64             :     };
      65             : 
      66             :     using LookupCallback = std::function<void(const std::string& name, const std::string& address, Response response)>;
      67             :     using SearchResult = std::vector<std::map<std::string, std::string>>;
      68             :     using SearchCallback = std::function<void(const SearchResult& result, Response response)>;
      69             :     using RegistrationCallback = std::function<void(RegistrationResponse response, const std::string& name)>;
      70             : 
      71             :     NameDirectory(const std::string& serverUrl, std::shared_ptr<dht::Logger> l = {});
      72             :     ~NameDirectory();
      73             :     void load();
      74             : 
      75             :     static NameDirectory& instance(const std::string& serverUrl, std::shared_ptr<dht::Logger> l = {});
      76             :     static NameDirectory& instance();
      77             : 
      78           0 :     void setToken(std::string token) { serverToken_ = std::move(token); }
      79             : 
      80             :     static void lookupUri(std::string_view uri, const std::string& default_server, LookupCallback cb);
      81             : 
      82             :     void lookupAddress(const std::string& addr, LookupCallback cb);
      83             :     void lookupName(const std::string& name, LookupCallback cb);
      84             :     bool searchName(const std::string& /*name*/, SearchCallback /*cb*/) { return false; }
      85             : 
      86             :     void registerName(const std::string& addr,
      87             :                       const std::string& name,
      88             :                       const std::string& owner,
      89             :                       RegistrationCallback cb,
      90             :                       const std::string& signedname,
      91             :                       const std::string& publickey);
      92             : 
      93             : private:
      94             :     NON_COPYABLE(NameDirectory);
      95             :     NameDirectory(NameDirectory&&) = delete;
      96             :     NameDirectory& operator=(NameDirectory&&) = delete;
      97             : 
      98             :     std::string serverUrl_;
      99             :     std::string serverToken_;
     100             :     std::filesystem::path cachePath_;
     101             : 
     102             :     std::mutex cacheLock_ {};
     103             :     std::shared_ptr<dht::Logger> logger_;
     104             : 
     105             :     /*
     106             :      * ASIO I/O Context for sockets in httpClient_.
     107             :      * Note: Each context is used in one thread only.
     108             :      */
     109             :     std::shared_ptr<asio::io_context> httpContext_;
     110             :     std::shared_ptr<dht::http::Resolver> resolver_;
     111             :     std::mutex requestsMtx_ {};
     112             :     std::set<std::shared_ptr<dht::http::Request>> requests_;
     113             : 
     114             :     std::map<std::string, std::string> pendingRegistrations_ {};
     115             : 
     116             :     std::map<std::string, std::pair<std::string, std::string>> nameCache_ {};
     117             :     std::map<std::string, std::pair<std::string, std::string>> addrCache_ {};
     118             : 
     119             :     asio::steady_timer saveTask_;
     120             : 
     121             :     void setHeaderFields(dht::http::Request& request);
     122             : 
     123        1549 :     std::pair<std::string, std::string> nameCache(const std::string& addr)
     124             :     {
     125        1549 :         std::lock_guard l(cacheLock_);
     126        1549 :         auto cacheRes = nameCache_.find(addr);
     127        3098 :         return cacheRes != nameCache_.end() ? cacheRes->second : std::pair<std::string, std::string> {};
     128        1549 :     }
     129           4 :     std::pair<std::string, std::string> addrCache(const std::string& name)
     130             :     {
     131           4 :         std::lock_guard l(cacheLock_);
     132           4 :         auto cacheRes = addrCache_.find(name);
     133           8 :         return cacheRes != addrCache_.end() ? cacheRes->second : std::pair<std::string, std::string> {};
     134           4 :     }
     135             : 
     136             :     static bool verify(const std::string& name, const dht::crypto::PublicKey& publickey, const std::string& signature);
     137             : 
     138             :     void scheduleCacheSave();
     139             :     void saveCache();
     140             :     void loadCache();
     141             : };
     142             : } // namespace jami