/// <summary>
/// Break links of all pids linked to pids on the fromNode node
/// </summary>
internal void BreakLinks(ErlAtom fromNode, IErlObject reason)
{
foreach (var m in m_Mailboxes)
{
m.Value.BreakLinks(fromNode, reason);
}
}
internal ErlTuple ToCtrlTuple(ErlAtom cookie)
{
switch (Type)
{
case Tag.Link: return(new ErlTuple((int)Type, m_From, m_To));
case Tag.Send: return(new ErlTuple((int)Type, cookie, m_To));
case Tag.Exit: return(new ErlTuple((int)Type, m_From, m_To, Reason));
case Tag.Unlink: return(new ErlTuple((int)Type, m_From, m_To));
case Tag.NodeLink: return(new ErlTuple((int)Type));
case Tag.RegSend: return(new ErlTuple((int)Type, m_From, cookie, m_To));
case Tag.GroupLeader: return(new ErlTuple((int)Type, m_From, m_To));
case Tag.Exit2: return(new ErlTuple((int)Type, m_From, m_To, Reason));
case Tag.SendTT: return(new ErlTuple((int)Type, cookie, m_To, TraceToken));
case Tag.Exit2TT:
case Tag.ExitTT: return(new ErlTuple((int)Type, m_From, m_To, TraceToken, Reason));
case Tag.RegSendTT: return(new ErlTuple((int)Type, m_From, cookie, m_To, TraceToken));
case Tag.MonitorP:
case Tag.DemonitorP: return(new ErlTuple((int)Type, m_From, Recipient, Ref));
case Tag.MonitorPexit: return(new ErlTuple((int)Type, Sender, m_To, Ref, Reason));
default: throw new ErlException(StringConsts.ERL_INVALID_VALUE_ERROR.Args(Type));
}
}
protected internal virtual void OnNodeStatusChange(ErlAtom node, bool up, object info)
{
if (NodeStatusChange != null)
{
NodeStatusChange(this, node, up, info);
}
}
/// <summary>
/// Create a node with the given name, cookie, and short name indicator
/// </summary>
public ErlLocalNode(string node, ErlAtom cookie, bool shortName = true,
bool acceptConns = true)
: base(node, cookie, shortName)
{
m_AcceptConnections = acceptConns;
TraceLevel = ErlApp.DefaultTraceLevel;
}
protected internal virtual void OnIoOutput(ErlAtom encoding, IErlObject output)
{
if (IoOutput != null)
{
IoOutput(this, encoding, output);
}
}
internal void IoOutput(ErlAtom encoding, IErlObject output)
{
if (m_OnIoOutput != null)
{
m_OnIoOutput(encoding, output);
}
}
public ErlConnection Connection(ErlAtom toNode, ErlAtom?cookie = null)
{
ErlConnection c;
if (m_Connections.TryGetValue(toNode, out c))
{
return(c);
}
var peer = new ErlRemoteNode(this, toNode, cookie);
//try to append config to remote node
TryAppendConfigToRemoteNode(peer);
lock (m_Connections)
{
if (m_Connections.TryGetValue(toNode, out c))
{
return(c);
}
try
{
c = new ErlConnection(this, peer, true);
}
catch
{
return(null);
}
m_Connections.TryAdd(toNode, c);
return(c);
}
}
internal void NodeStatus(ErlAtom node, bool up, object info)
{
if (m_OnNodeStatus != null)
{
m_OnNodeStatus(node, up, info);
}
}
internal void ConnectAttempt(ErlAtom node, Direction dir, object info)
{
if (m_OnConnectAttempt != null)
{
m_OnConnectAttempt(node, dir, info);
}
}
/// <summary>
/// Used to break all known links to this mbox
/// </summary>
internal void BreakLinks(ErlAtom reason)
{
foreach (var l in m_Links.Clear())
{
m_Node.Deliver(ErlMsg.Exit(m_Self, l.Pid, reason));
}
}
static ErlAbstractNode()
{
try { LocalHost = System.Net.Dns.GetHostName(); }
catch { LocalHost = "localhost"; }
s_DefaultCookie = tryReadDefaultCookieFromFile();
}
protected internal virtual void OnConnectAttempt(ErlAtom node, Direction dir, object info)
{
if (ConnectAttempt != null)
{
ConnectAttempt(this, node, dir, info);
}
}
protected internal void OnEpmdFailedConnectAttempt(ErlAtom node, object info)
{
if (EpmdFailedConnectAttempt != null)
{
EpmdFailedConnectAttempt(this, node, info);
}
}
/// <summary>
/// Create a node with the given name and cookie
/// </summary>
/// <param name="name">Node name in the form "name" or "name@hostname"</param>
/// <param name="cookie">Security cookie used to connect to this/other node(s)</param>
/// <param name="shortName">Use short/long host names</param>
protected ErlAbstractNode(string name, ErlAtom cookie, bool shortName)
: base(null)
{
m_Cookie = new ErlAtom(cookie.Empty ? s_DefaultCookie : cookie);
m_UseShortName = shortName;
SetNodeName(name);
}
/// <summary>
/// Create an Erlang pid from the given values
/// </summary>
public ErlPid(ErlAtom node, int id, int serial, int creation)
{
// TODO: check compatibility with latest version of Erlang supporting 28bit pids
Node = node;
// m_Num is 15+13+2 bits
m_Num = (((id & 0x7fff) << 15)
| ((serial & 0x1fff) << 2)
| (creation & 0x3)) & 0x3fffFFFF;
}
internal ErlMbox(ErlLocalNode home, ErlPid self, ErlAtom name)
{
m_Self = self;
m_Node = home;
m_RegName = name;
m_Queue = new ErlBlockingQueue <IQueable>();
m_Links = new ErlLinks();
m_Monitors = new ErlMonitors(this);
}
private byte[] genDigest(int challenge, ErlAtom cookie)
{
long ch2 = challenge < 0
? 1L << 31 | (long)(challenge & 0x7FFFFFFFL)
: (long)challenge;
return(new MD5CryptoServiceProvider().ComputeHash(
Encoding.UTF8.GetBytes(cookie.Value + Convert.ToString(ch2))));
}
public IErlObject RPC(ErlAtom node, ErlAtom mod, ErlAtom fun, ErlList args, int timeout, ErlAtom?remoteCookie = null)
{
AsyncRPC(node, mod, fun, args, remoteCookie);
var r = m_Monitors.Add(node);
using (Scope.OnExit(() => m_Monitors.Remove(r)))
{
return(ReceiveRPC(timeout));
}
}
public bool Register(ErlAtom name)
{
var res = m_Node.Mailboxes.Register(name, this);
if (res)
{
m_RegName = name;
}
return(res);
}
/// <summary>
/// Close this mailbox
/// </summary>
/// <remarks>
/// After this operation, the mailbox will no longer be able to
/// receive messages. Any delivered but as yet unretrieved messages
/// can still be retrieved however.
///
/// If there are links from this mailbox to other <see cref="ErlPid"/>
/// pids they will be broken when this method is
/// called and exit signals will be sent.
/// </remarks>
internal void Close()
{
// Notify all registered monitors that this pid is closing
foreach (var monitor in m_Monitors)
{
var msg = ErlMsg.MonitorPexit(m_Self, monitor.Value, monitor.Key, ErlAtom.Normal);
m_Node.Deliver(monitor.Value.Node, msg);
}
m_Node.CloseMbox(this);
m_RegName = ErlAtom.Null;
}
public List <ErlLink> Remove(ErlAtom toNode)
{
var links = new List <ErlLink>(Math.Min(m_Links.Count, 32));
lock (m_Links)
m_Links.RemoveWhere(l => { var r = l.Node == toNode; if (r)
{
links.Add(l);
}
return(r); });
return(links);
}
public IErlObject RPC(ErlAtom node, ErlAtom mod, ErlAtom fun, ErlList args, int timeout)
{
var mbox = m_Mailboxes.Create(true);
try
{
var res = mbox.RPC(node, mod, fun, args, timeout);
return(res);
}
finally
{
m_Mailboxes.Unregister(mbox);
}
}
public void RPCcast(ErlAtom node, ErlAtom mod, ErlAtom fun, ErlList args, IErlObject ioServer)
{
if (node.Equals(m_Node.NodeName))
{
throw new ErlException(StringConsts.ERL_CONN_CANT_RPC_TO_LOCAL_NODE_ERROR);
}
else
{
var msg = Internal.ErlRpcServer.EncodeRPCcast(m_Self, mod, fun, args, ioServer);
var conn = m_Node.Connection(node);
if (conn == null)
{
throw new ErlConnectionException(
node, StringConsts.ERL_CONN_CANT_CONNECT_TO_NODE_ERROR.Args(node));
}
conn.Send(m_Self, ConstAtoms.Rex, msg);
}
}
internal bool Deliver(ErlAtom node, ErlMsg msg)
{
if (node == NodeName)
{
return(Deliver(msg));
}
var conn = Connection(node);
if (conn == null)
{
return(false);
}
try { conn.Send(msg); }
catch { return(false); }
return(true);
}
private void sendChallenge(int dist, ErlAbstractNode.NodeCompatibility flags, int challenge)
{
ErlAtom str = m_Home.NodeName;
var obuf = new ErlOutputStream(writeVersion: false, writePktSize: false, capacity: 11 + str.Length);
obuf.Write2BE((short)str.Length + 11); // 11 bytes + nodename
obuf.Write1((byte)ErlAbstractNode.NodeType.Ntype_R6);
obuf.Write2BE((short)dist);
obuf.Write4BE((int)flags);
obuf.Write4BE(challenge);
obuf.Write(Encoding.ASCII.GetBytes(str.Value));
obuf.WriteTo(m_TcpClient.GetStream());
m_Home.OnTrace(ErlTraceLevel.Handshake, Direction.Outbound, () =>
"sendChallenge(flags({0:X2})={1}, dist={2}, challenge={3}, local={4}".Args(
(int)flags, flags, dist, challenge, m_Home.AliveName));
}
/// <summary>
/// Send an auth error to peer because he sent a bad cookie
/// The auth error uses his cookie (not revealing ours).
/// This is just like send_reg otherwise
/// </summary>
private void cookieError(ErlLocalNode local, ErlAtom cookie)
{
var header = new ErlOutputStream(writeVersion: false, capacity: HEADER_LEN);
// preamble: 4 byte length + "PASS_THROUGH" tag + version
header.Write4BE(0); // reserve space for length
header.Write1(PASS_THROUGH);
header.Write1((byte)ErlExternalTag.Version);
header.WriteTupleHead(4);
header.WriteLong((long)ErlMsg.Tag.RegSend);
header.WritePid(local.CreatePid()); // disposable pid
header.WriteAtom(cookie); // important: his cookie, not mine...
header.WriteAtom("auth");
// version for payload written later by the payload stream
//header.Write1((byte)ErlExternalTag.Version);
// the payload
// the no_auth message (copied from Erlang) Don't change this (Erlang will crash)
// {$gen_cast, {print, "~n** Unauthorized cookie ~w **~n", [foo@aule]}}
var msg = ErlObject.Parse(
"{'$gen_cast', {print, \"\n** Unauthorized cookie ~w **\n\", [" + local.NodeName.Value + "]}}");
var payload = new ErlOutputStream(msg, writeVersion: true);
// fix up length in preamble
header.Poke4BE(0, (int)(header.Length + payload.Length - 4));
try
{
DoSend(header, payload);
}
catch (Exception e)
{
Close();
throw new ErlException(StringConsts.ERL_CONN_UNAUTH_COOKIE_ERROR.Args(cookie.Value), e);
}
}
/// <summary>
/// Create an Erlang reference from the given values
/// </summary>
public ErlRef(ErlAtom node, uint[] ids, int creation)
{
Node = node;
Creation = creation & 0x3;
if (ids.Length == 3)
{
Ids = ids;
}
else
{
Ids = new uint[3];
int i = 0;
for (int n = Math.Min(ids.Length, 3); i < n; i++)
{
Ids[i] = ids[i];
}
for (; i < 3; i++)
{
Ids[i] = 0;
}
}
}
/// <summary>
/// Used to break all known links to this mbox
/// </summary>
internal void BreakLinks(ErlAtom fromNode, IErlObject reason)
{
var links = m_Links.Remove(fromNode);
foreach (var link in links)
{
if (link.HasPid)
{
m_Node.Deliver(ErlMsg.Exit(m_Self, link.Pid, reason));
}
else
{
m_Node.Deliver(new ErlConnectionException(fromNode, reason));
}
}
foreach (var m in m_Monitors.Where(o => o.Value.Node == fromNode)
.Where(m => m_Monitors.Remove(m.Key)))
{
Deliver(new ErlConnectionException(fromNode, reason));
}
}
internal static void splitNodeName(string name, bool shortName,
out string alive, out string host, out ErlAtom nodeName, out ErlAtom longName)
{
int i = name.IndexOf('@');
if (i < 0)
{
alive = name;
host = LocalHost;
}
else
{
alive = name.Substring(0, i);
host = name.Substring(i + 1);
}
if (alive.Length > AtomTable.MAX_ATOM_LEN)
{
alive = alive.Substring(0, AtomTable.MAX_ATOM_LEN);
}
longName = new ErlAtom(alive + "@" + host);
nodeName = node(longName, shortName);
}
public void Down(ErlRef eref, ErlPid pid, ErlAtom reason)
{
// TODO
throw new NotImplementedException();
}
