public static JoinBlock FromID(byte[] id)
{
var offset = 0;
var ip_bytes = id.Skip(offset).Take(4).ToArray();
var port_bytes = id.Skip(offset + 4).Take(2).ToArray();
var addr = new IPAddress(ip_bytes);
var port = BitConverter.ToUInt16(port_bytes, 0);
var block = new JoinBlock(addr, port);
if (!block.Verify(id))
{
return(null);
}
return(block);
}
public override INode Connect(byte[] id)
{
var join_block = JoinBlock.FromID(id);
if (join_block == null)
{
return(null);
}
var endpoint = new IPEndPoint(join_block.Address, join_block.Port);
var node = Self.CreateRemoteNode(endpoint) as HarmonyRemoteNode;
if (node == null)
{
MarkUnreachable(id);
return(null);
}
node.DisconnectEvent += HandleNodeDisconnect;
Add(node);
return(node);
}
static void Main(string[] args)
{
// initialize NLog
var console_target = new ColoredConsoleTarget("console")
{
Layout = @"${date:format=HH\:mm\:ss.fff} [${level}] ${message} ${exception}"
};
var nlog_config = new LoggingConfiguration();
nlog_config.AddTarget(console_target);
nlog_config.AddRuleForAllLevels(console_target);
LogManager.Configuration = nlog_config;
// register IPAddressResolver for the serializer to work
CompositeResolver.RegisterAndSetAsDefault(IPAddressResolver.Instance, StandardResolver.Instance);
// create data store
var data_store = new DataStore();
// create option set for command line argument parsing
var bootstrap_list = new List <string>();
var listen_arg = "";
var api_listen_arg = "";
var tracker_arg = "";
bool test_mode = false;
bool daemon_mode = false;
bool metrics = false;
var tracker_interval = 60;
var max_peers = 8;
OptionSet set = null;
set = new OptionSet()
{
{ "b|bootstrap=", "A comma-separated list of Harmony IDs or IP endpoints. (can be mixed)", b => bootstrap_list.AddRange(b.Split(',')) },
{ "l|listen=", "Starts listening for Harmony connections on the given IP endpoint. " +
"If only an integer is specified, treats the argument as 127.0.0.1:<port>." +
"If only an address is specified, treats the argument as <addr>:<random_port>", l => listen_arg = l },
{ "api=", "Starts listening for HTTP requests on the given IP endpoint. Implements the Harmony REST API." +
"If only an integer is specified, treats the argument as 127.0.0.1:<port>." +
"If only an address is specified, treats the argument as <addr>:<random_port>", l => api_listen_arg = l },
{ "test", "Starts an interactive test session after boot.", t => test_mode = true },
{ "c|cache=", "Instructs Harmony to read cached pieces from the given cache directory.", c => data_store.CachePath = c },
{ "daemon", "Replaces stdin reads with indefinite waits and never updates title display, useful for when running as a daemon", d => daemon_mode = true },
{ "t|tracker=", "Announces and asks for peers from a tracker Zgibe server.", t => tracker_arg = t },
{ "tracker-interval=", "Sets the announcement and node stability check interval in seconds.", i => tracker_interval = int.Parse(i) },
{ "n|name=", "Sets the node name, announced to other peers and added to the response headers of the HTTP API.", n => Name = n },
{ "m|max-peers=", "The maximum number of peers to connect to. Recommended to be set above 4.", m => max_peers = int.Parse(m) },
{ "metrics", "Prints node metrics every stabilization cycle.", m => metrics = true },
{ "?|h|help", "Shows this text.", h =>
{
Console.WriteLine("usage: harmony [--listen [<IP>:]<port>] [--api [<IP>:]port] [--bootstrap ...]\n" +
" [--tracker <URI>] [--name <name>] [--tracker-interval <seconds>]\n" +
" [--cache <path>] [--max-peers <N>] [--test] [--help] [--daemon]\n" +
" [--metrics]\n");
Console.WriteLine();
set.WriteOptionDescriptions(Console.Out);
Environment.Exit(0);
} }
};
var cli_leftovers = set.Parse(args);
Log.Info("Harmony starting.");
Log.Debug($"args: [{string.Join(", ", args.Select(arg => $"\"{arg}\""))}]");
// interpret command line arguments
IPEndPoint listen_ep = new IPEndPoint(IPAddress.None, 0);
IPEndPoint api_listen_ep = new IPEndPoint(IPAddress.None, 0);
if (ushort.TryParse(listen_arg, out ushort listen_port))
{
listen_ep = new IPEndPoint(IPAddress.Loopback, listen_port);
}
else if (IPAddress.TryParse(listen_arg, out IPAddress listen_addr))
{
listen_ep = new IPEndPoint(listen_addr, 30000 + Random.Next(1000));
}
else if (Utilities.TryParseIPEndPoint(listen_arg, out IPEndPoint temp_ep))
{
listen_ep = temp_ep;
}
if (ushort.TryParse(api_listen_arg, out ushort api_listen_port))
{
api_listen_ep = new IPEndPoint(IPAddress.Loopback, api_listen_port);
}
else if (IPAddress.TryParse(api_listen_arg, out IPAddress api_listen_addr))
{
api_listen_ep = new IPEndPoint(api_listen_addr, 8000 + Random.Next(1000));
}
else if (Utilities.TryParseIPEndPoint(api_listen_arg, out IPEndPoint temp_ep))
{
api_listen_ep = temp_ep;
}
if (listen_ep.Address == IPAddress.None && listen_ep.Port == 0)
{
if (listen_arg.Any())
{
Log.Warn($"Invalid argument passed to --listen: \"{listen_arg}\" is not a parsable IP endpoint. Try something in the form of 127.0.0.1:30001.");
}
listen_ep = new IPEndPoint(IPAddress.Loopback, 30000 + Random.Next(1000));
}
if (!string.IsNullOrWhiteSpace(tracker_arg))
{
if (Uri.TryCreate(tracker_arg, UriKind.Absolute, out Uri tracker))
{
Tracker = tracker;
}
else if (Uri.TryCreate($"http://{tracker_arg}/", UriKind.Absolute, out tracker))
{
Tracker = tracker;
}
else
{
Log.Warn($"Invalid argument passed to --tracker: \"{tracker_arg}\" is not a parsable HTTP URI. Try something in the form of http://tracker.example.com/.");
}
}
ListenEP = listen_ep;
Log.Info($"Listening for Harmony connections on {listen_ep}");
DaemonMode = daemon_mode;
// start HTTP server if needed
if (api_listen_ep.Port != 0)
{
Log.Info($"Listening for HTTP requests on {api_listen_ep}");
var host = new WebHostBuilder()
.UseUrls($"http://{api_listen_ep}/")
.UseKestrel()
.ConfigureLogging((logging) => { logging.ClearProviders(); })
.SuppressStatusMessages(true)
.UseStartup <Startup>()
.Build();
host.RunAsync();
Log.Info("Started API server");
}
// initialize network parameters
HashSingleton.Hash = SHA256.Create();
Node = new HarmonyNode(listen_ep);
Node.Network.MaximumPeers = max_peers;
Node.LocalDataStore = data_store;
Node.PrintMetricOutput = metrics;
HarmonyModule.Node = Node; // Nancy module for the HTTP API
// announce self to tracker if configured
if (Tracker != default)
{
Announcer.AnnounceTo(Tracker, Node);
}
// configure title display
if (!DaemonMode)
{
Node.PredecessorChanged += (e, s) => { UpdateDisplay(); };
Node.SuccessorChanged += (e, s) => { UpdateDisplay(); };
Task.Run(() => { while (true)
{
UpdateDisplay(); Thread.Sleep(1000);
}
}).ConfigureAwait(false);
}
// start node
Node.Start();
Log.Info($"Started node, our ID is {Node.ID.ToUsefulString()}");
Log.Info($"Piece cache is located at {Node.LocalDataStore.CachePath}");
// join network
if (bootstrap_list.Any())
{
Log.Info($"Bootstrapping from {bootstrap_list.Count} sources...");
foreach (var bootstrap_node in bootstrap_list)
{
bool bootstrap_result = false;
if (bootstrap_node.Length == (HashSingleton.Hash.HashSize / 4)) // if bootstrap_node is an ID
{
var bootstrap_id = Utilities.ParseBytesFromString(bootstrap_node);
bootstrap_result = Node.Join(bootstrap_id);
}
else if (Utilities.TryParseIPEndPoint(bootstrap_node, out IPEndPoint bootstrap_ep))
{
var join_block = new JoinBlock(bootstrap_ep);
bootstrap_result = Node.Join(join_block.GenerateID());
}
else
{
Log.Warn($"Couldn't parse bootstrap node descriptor \"{bootstrap_node}\". Bootstrap descriptors can be in 2 forms: " +
$"IP end point (ex.: 127.0.0.1:30303) or node ID (abbv. ex.: 7f00...34fc)");
}
if (bootstrap_result)
{
Log.Info($"Successfully connected to {bootstrap_node}");
}
else
{
Log.Warn($"Failed to connect to {bootstrap_node}");
}
}
}
else
{
Log.Warn($"No bootstrap nodes specified, we're alone. You can form an actual network by passing either " +
$"{Node.ID.ToUsefulString()} or {listen_ep} to another Harmony instance.");
Node.Join(default);