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dhtnode.cpp

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    dhtnode.cpp 16.20 KiB
    /*
     *  Copyright (C) 2014-2016 Savoir-faire Linux Inc.
     *
     *  Author: Adrien Béraud <adrien.beraud@savoirfairelinux.com>
     *
     *  This program is free software; you can redistribute it and/or modify
     *  it under the terms of the GNU General Public License as published by
     *  the Free Software Foundation; either version 3 of the License, or
     *  (at your option) any later version.
     *
     *  This program is distributed in the hope that it will be useful,
     *  but WITHOUT ANY WARRANTY; without even the implied warranty of
     *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     *  GNU General Public License for more details.
     *
     *  You should have received a copy of the GNU General Public License
     *  along with this program; if not, write to the Free Software
     *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
     */
    
    #include "tools_common.h"
    extern "C" {
    #include <gnutls/gnutls.h>
    }
    
    #include <set>
    #include <thread> // std::this_thread::sleep_for
    
    using namespace dht;
    
    void print_usage() {
        std::cout << "Usage: dhtnode [-v [-l logfile]] [-i] [-d] [-n network_id] [-p local_port] [-b bootstrap_host[:port]]" << std::endl << std::endl;
        std::cout << "dhtnode, a simple OpenDHT command line node runner." << std::endl;
        std::cout << "Report bugs to: http://opendht.net" << std::endl;
    }
    
    void print_id_req() {
        std::cout << "An identity is required to perform this operation (run with -i)" << std::endl;
    }
    
    void print_node_info(const std::shared_ptr<DhtRunner>& dht, const dht_params& params) {
        std::cout << "OpenDht node " << dht->getNodeId() << " running on port " <<  dht->getBoundPort() << std::endl;
        if (params.generate_identity)
            std::cout << "Public key ID " << dht->getId() << std::endl;
    }
    
    void print_help() {
        std::cout << "OpenDht command line interface (CLI)" << std::endl;
        std::cout << "Possible commands:" << std::endl
                  << "  h, help    Print this help message." << std::endl
                  << "  x, quit    Quit the program." << std::endl
                  << "  log        Start/stop printing DHT logs." << std::endl;
    
        std::cout << std::endl << "Node information:" << std::endl
                  << "  ll         Print basic information and stats about the current node." << std::endl
                  << "  ls         Print basic information about current searches." << std::endl
                  << "  ld         Print basic information about currenty stored values on this node." << std::endl
                  << "  lr         Print the full current routing table of this node" << std::endl;
    
        std::cout << std::endl << "Operations on the DHT:" << std::endl
                  << "  b <ip:port>             Ping potential node at given IP address/port." << std::endl
                  << "  g <key>               Get values at <key>." << std::endl
                  << "  l <key>               Listen for value changes at <key>." << std::endl
                  << "  p <key> <str>         Put string value at <key>." << std::endl
                  << "  s <key> <str>         Put string value at <key>, signed with our generated private key." << std::endl
                  << "  e <key> <dest> <str>  Put string value at <key>, encrypted for <dest> with its public key (if found)." << std::endl;
        std::cout << std::endl << "Indexation operations on the DHT:" << std::endl
                  << "  il <name> <key> [exact match]   Lookup the index named <name> with the key <key>." << std::endl
                  << "                                  Set [exact match] to 'false' for inexact match lookup." << std::endl
                  << "  ii <name> <key> <value>         Inserts the value <value> under the key <key> in the index named <name>." << std::endl
                  << std::endl;
    }
    
    void cmd_loop(std::shared_ptr<DhtRunner>& dht, dht_params& params)
    {
        print_node_info(dht, params);
        std::cout << " (type 'h' or 'help' for a list of possible commands)" << std::endl << std::endl;
    
        // using the GNU History API
        using_history();
    
        std::map<std::string, indexation::Pht> indexes;
    
        while (true)
        {
            // using the GNU Readline API
            std::string line = readLine();
            if (!line.empty() && line[0] == '\0')
                break;
    
            std::istringstream iss(line);
            std::string op, idstr, value, index, keystr;
            iss >> op;
    
            if (op == "x" || op == "exit" || op == "quit") {
                break;
            } else if (op == "h" || op == "help") {
                print_help();
                continue;
            } else if (op == "ll") {
                print_node_info(dht, params);
                unsigned good4, dubious4, cached4, incoming4;
                unsigned good6, dubious6, cached6, incoming6;
                dht->getNodesStats(AF_INET, &good4, &dubious4, &cached4, &incoming4);
                dht->getNodesStats(AF_INET6, &good6, &dubious6, &cached6, &incoming6);
                std::cout << "IPv4 nodes : " << good4 << " good, " << dubious4 << " dubious, " << incoming4 << " incoming." << std::endl;
                std::cout << "IPv6 nodes : " << good6 << " good, " << dubious6 << " dubious, " << incoming6 << " incoming." << std::endl;
                continue;
            } else if (op == "lr") {
                std::cout << "IPv4 routing table:" << std::endl;
                std::cout << dht->getRoutingTablesLog(AF_INET) << std::endl;
                std::cout << "IPv6 routing table:" << std::endl;
                std::cout << dht->getRoutingTablesLog(AF_INET6) << std::endl;
                continue;
            } else if (op == "ld") {
                std::cout << dht->getStorageLog() << std::endl;
                continue;
            } else if (op == "ls") {
                std::cout << "Searches:" << std::endl;
                std::cout << dht->getSearchesLog() << std::endl;
                continue;
            } else if (op == "la")  {
                std::cout << "Reported public addresses:" << std::endl;
                auto addrs = dht->getPublicAddressStr();
                for (const auto& addr : addrs)
                    std::cout << addr << std::endl;
                continue;
            } else if (op == "b") {
                iss >> idstr;
                try {
                    auto addr = splitPort(idstr);
                    if (not addr.first.empty() and addr.second.empty()){
                        std::stringstream ss;
                        ss << DHT_DEFAULT_PORT;
                        addr.second = ss.str();
                    }
                    dht->bootstrap(addr.first.c_str(), addr.second.c_str());
                } catch (const std::exception& e) {
                    std::cerr << e.what() << std::endl;
                }
                continue;
            } else if (op == "log") {
                params.log = !params.log;
                if (params.log)
                    log::enableLogging(*dht);
                else
                    log::disableLogging(*dht);
                continue;
            }
    
            if (op.empty())
                continue;
    
            static const std::set<std::string> VALID_OPS {"g", "l", "il", "ii", "p", "s", "e", "a"};
            if (VALID_OPS.find(op) == VALID_OPS.cend()) {
                std::cout << "Unknown command: " << op << std::endl;
                std::cout << " (type 'h' or 'help' for a list of possible commands)" << std::endl;
                continue;
            }
    
            if (op == "il" or op == "ii") {
                // Pht syntax
                iss >> index >> keystr;
                auto new_index = std::find_if(indexes.begin(), indexes.end(),
                        [&](std::pair<const std::string, indexation::Pht>& i) {
                            return i.first == index;
                        }) == indexes.end();
                if (not index.size()) {
                    std::cout << "You must enter the index name." << std::endl;
                    continue;
                } else if (new_index) {
                    using namespace dht::indexation;
                    try {
                        auto key = createPhtKey(parseStringMap(keystr));
                        Pht::KeySpec ks;
                        std::transform(key.begin(), key.end(), std::inserter(ks, ks.end()), [](Pht::Key::value_type& f) {
                            return std::make_pair(f.first, f.second.size());
                        });
                        indexes.emplace(index, Pht {index, std::move(ks), dht});
                    } catch (std::invalid_argument& e) { std::cout << e.what() << std::endl; }
                }
            }
            else {
                // Dht syntax
                iss >> idstr;
                InfoHash h {idstr};
                if (not isInfoHash(h))
                    continue;
            }
    
            dht::InfoHash id {idstr};
            // Dht
            auto start = std::chrono::high_resolution_clock::now();
            if (op == "g") {
                std::string rem;
                std::getline(iss, rem);
                dht->get(id, [start](std::shared_ptr<Value> value) {
                    auto now = std::chrono::high_resolution_clock::now();
                    std::cout << "Get: found value (after " << print_dt(now-start) << "s)" << std::endl;
                    std::cout << "\t" << *value << std::endl;
                    return true;
                }, [start](bool ok) {
                    auto end = std::chrono::high_resolution_clock::now();
                    std::cout << "Get: " << (ok ? "completed" : "failure") << " (took " << print_dt(end-start) << "s)" << std::endl;
                }, {}, dht::Where {std::move(rem)});
            }
            else if (op == "q") {
                std::string rem;
                std::getline(iss, rem);
                dht->query(id, [start](const std::vector<std::shared_ptr<FieldValueIndex>>& field_value_indexes) {
                    auto now = std::chrono::high_resolution_clock::now();
                    for (auto& index : field_value_indexes) {
                        std::cout << "Query: found field value index (after " << print_dt(now-start) << "s)" << std::endl;
                        std::cout << "\t" << *index << std::endl;
                    }
                    return true;
                }, [start](bool ok) {
                    auto end = std::chrono::high_resolution_clock::now();
                    std::cout << "Query: " << (ok ? "completed" : "failure") << " (took " << print_dt(end-start) << "s)" << std::endl;
                }, dht::Query {std::move(rem)});
            }
            else if (op == "l") {
                std::string rem;
                std::getline(iss, rem);
                dht->listen(id, [](std::shared_ptr<Value> value) {
                    std::cout << "Listen: found value:" << std::endl;
                    std::cout << "\t" << *value << std::endl;
                    return true;
                }, {}, dht::Where {std::move(rem)});
            }
            else if (op == "p") {
                std::string v;
                iss >> v;
                dht->put(id, dht::Value {
                    dht::ValueType::USER_DATA.id,
                    std::vector<uint8_t> {v.begin(), v.end()}
                }, [start](bool ok) {
                    auto end = std::chrono::high_resolution_clock::now();
                    std::cout << "Put: " << (ok ? "success" : "failure") << " (took " << print_dt(end-start) << "s)" << std::endl;
                });
            }
            else if (op == "s") {
                if (not params.generate_identity) {
                    print_id_req();
                    continue;
                }
                std::string v;
                iss >> v;
                dht->putSigned(id, dht::Value {
                    dht::ValueType::USER_DATA.id,
                    std::vector<uint8_t> {v.begin(), v.end()}
                }, [start](bool ok) {
                    auto end = std::chrono::high_resolution_clock::now();
                    std::cout << "Put signed: " << (ok ? "success" : "failure") << " (took " << print_dt(end-start) << "s)" << std::endl;
                });
            }
            else if (op == "e") {
                if (not params.generate_identity) {
                    print_id_req();
                    continue;
                }
                std::string tostr;
                std::string v;
                iss >> tostr >> v;
                dht->putEncrypted(id, InfoHash(tostr), dht::Value {
                    dht::ValueType::USER_DATA.id,
                    std::vector<uint8_t> {v.begin(), v.end()}
                }, [start](bool ok) {
                    auto end = std::chrono::high_resolution_clock::now();
                    std::cout << "Put encrypted: " << (ok ? "success" : "failure") << " (took " << print_dt(end-start) << "s)" << std::endl;
                });
            }
            else if (op == "a") {
                in_port_t port;
                iss >> port;
                dht->put(id, dht::Value {dht::IpServiceAnnouncement::TYPE.id, dht::IpServiceAnnouncement(port)}, [start](bool ok) {
                    auto end = std::chrono::high_resolution_clock::now();
                    std::cout << "Announce: " << (ok ? "success" : "failure") << " (took " << print_dt(end-start) << "s)" << std::endl;
                });
            }
            else if (op == "il") {
                std::string exact_match;
                iss >> exact_match;
                try {
                    auto key = createPhtKey(parseStringMap(keystr));
                    indexes.at(index).lookup(key,
                        [=](std::vector<std::shared_ptr<indexation::Value>>& vals, indexation::Prefix p) {
                            if (vals.empty())
                                return;
                            std::cout << "Pht::lookup: found entries!" << std::endl
                                      << p.toString() << std::endl
                                      << "   hash: " << p.hash() << std::endl;
                            std::cout << "   entries:" << std::endl;
                            for (auto v : vals)
                                 std::cout << "      " << v->first.toString() << "[vid: " << v->second << "]" << std::endl;
                        },
                        [start](bool ok) {
                            auto end = std::chrono::high_resolution_clock::now();
                            std::cout << "Pht::lookup: " << (ok ? "done." : "failed.")
                                      << " took " << print_dt(end-start) << "s)" << std::endl;
    
                        }, exact_match.size() != 0 and exact_match == "false" ? false : true
                    );
                }
                catch (std::invalid_argument& e) { std::cout << e.what() << std::endl; }
                catch (std::out_of_range& e) { }
            }
            else if (op == "ii") {
                iss >> idstr;
                InfoHash h {idstr};
                if (not isInfoHash(h))
                    continue;
    
                indexation::Value v {h, 0};
                try {
                    auto key = createPhtKey(parseStringMap(keystr));
                    indexes.at(index).insert(key, v,
                        [=](bool ok) {
                            std::cout << "Pht::insert: " << (ok ? "done." : "failed.") << std::endl;
                        }
                    );
                }
                catch (std::invalid_argument& e) { std::cout << e.what() << std::endl; }
                catch (std::out_of_range& e) { }
            }
        }
    
        std::cout << std::endl <<  "Stopping node..." << std::endl;
    }
    
    int
    main(int argc, char **argv)
    {
        auto dht = std::make_shared<DhtRunner>();
    
        try {
            auto params = parseArgs(argc, argv);
            if (params.help) {
                print_usage();
                return 0;
            }
            if (params.daemonize) {
                daemonize();
            }
    
            dht::crypto::Identity crt {};
            if (params.generate_identity) {
                auto ca_tmp = dht::crypto::generateIdentity("DHT Node CA");
                crt = dht::crypto::generateIdentity("DHT Node", ca_tmp);
            }
    
            dht->run(params.port, crt, true, params.network);
    
            if (params.log) {
                if (not params.logfile.empty())
                    log::enableFileLogging(*dht, params.logfile);
                else
                    log::enableLogging(*dht);
            }
    
            if (not params.bootstrap.first.empty()) {
                //std::cout << "Bootstrap: " << params.bootstrap.first << ":" << params.bootstrap.second << std::endl;
                dht->bootstrap(params.bootstrap.first.c_str(), params.bootstrap.second.c_str());
            }
    
            if (params.daemonize) {
                while (true)
                    std::this_thread::sleep_for(std::chrono::seconds(30));
            } else {
                cmd_loop(dht, params);
            }
    
        } catch(const std::exception&e) {
            std::cerr << std::endl <<  e.what() << std::endl;
        }
    
        std::condition_variable cv;
        std::mutex m;
        std::atomic_bool done {false};
    
        dht->shutdown([&]()
        {
            std::lock_guard<std::mutex> lk(m);
            done = true;
            cv.notify_all();
        });
    
        // wait for shutdown
        std::unique_lock<std::mutex> lk(m);
        cv.wait(lk, [&](){ return done.load(); });
    
        dht->join();
        return 0;
    }