/*
* 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 [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 DhtRunner& dht, const dht_params& params) {
std::cout << "OpenDht node " << dht.getNodeId() << " running on port " << dht.getBoundPort() << std::endl;
if (params.is_bootstrap_node)
std::cout << "Running in bootstrap mode (discouraged)." << 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
<< " q, 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::endl;
}
void cmd_loop(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();
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;
iss >> op >> idstr;
if (op == "x" || op == "q" || 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") {
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;
dht::InfoHash id {idstr};
static const std::set<std::string> VALID_OPS {"g", "l", "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;
}
static constexpr dht::InfoHash INVALID_ID {};
if (id == INVALID_ID) {
std::cout << "Syntax error: invalid InfoHash." << std::endl;
continue;
}
auto start = std::chrono::high_resolution_clock::now();
if (op == "g") {
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;
});
}
else if (op == "l") {
dht.listen(id, [](std::shared_ptr<Value> value) {
std::cout << "Listen: found value:" << std::endl;
std::cout << "\t" << *value << std::endl;
return true;
});
}
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;
});
}
}
std::cout << std::endl << "Stopping node..." << std::endl;
}
int
main(int argc, char **argv)
{
if (int rc = gnutls_global_init()) // TODO: remove with GnuTLS >= 3.3
throw std::runtime_error(std::string("Error initializing GnuTLS: ")+gnutls_strerror(rc));
DhtRunner dht;
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();
gnutls_global_deinit();
return 0;
}