// used by send and send_reg (message types with payload)
protected void DoSend(OtpOutputStream header, OtpOutputStream payload)
{
lock (objWrite)
{
try
{
if (TraceLevel >= TraceSend)
{
// Need to decode header and output buffer to show trace
// message!
// First make OtpInputStream, then decode.
try
{
IOtpErlangObject h = header.Slice(5).ReadAny();
Logger.Debug("-> " + HeaderType(h) + " " + h);
IOtpErlangObject o = payload.Slice(0).ReadAny();
Logger.Debug(" " + o);
}
catch (OtpDecodeException e)
{
Logger.Debug(" " + "can't decode output buffer:" + e);
}
}
header.WriteTo(socket.OutputStream);
payload.WriteTo(socket.OutputStream);
}
catch (IOException)
{
Close();
throw;
}
}
}
private void r4_names(TcpClient s, OtpInputStream ibuf)
{
try
{
if (traceLevel >= traceThreshold)
{
log.Debug("<- NAMES(r4) ");
}
OtpOutputStream obuf = new OtpOutputStream();
obuf.write4BE(EpmdPort.get());
lock (portmap)
{
foreach (KeyValuePair <string, OtpPublishedNode> pair in portmap)
{
OtpPublishedNode node = pair.Value;
string info = String.Format("name {0} at port {1}\n", node.Alive, node.Port);
byte[] bytes = Encoding.GetEncoding("iso-8859-1").GetBytes(info);
obuf.writeN(bytes);
}
}
obuf.WriteTo(s.GetStream());
}
catch (IOException)
{
if (traceLevel >= traceThreshold)
{
log.Debug("<- (no response)");
}
throw new IOException("Request not responding");
}
return;
}
// used by the other message types
protected void DoSend(OtpOutputStream header)
{
lock (objWrite)
{
try
{
if (TraceLevel >= TraceCTRL)
{
try
{
IOtpErlangObject h = header.Slice(5).ReadAny();
Logger.Debug("-> " + HeaderType(h) + " " + h);
}
catch (OtpDecodeException e)
{
Logger.Debug(" " + "can't decode output buffer: " + e);
}
}
header.WriteTo(socket.OutputStream);
}
catch (IOException)
{
Close();
throw;
}
}
}
private void ListenActivity()
{
EndPoint remote = new IPEndPoint(IPAddress.Any, 0);
for (;;)
{
byte[] message = new byte[BUF];
while (this.socket.Available == 0) { }
int size = this.socket.ReceiveFrom(message, ref remote);
if (size == 0) continue;
Debug.Print("Received " + size + " bytes from " + ((IPEndPoint)remote).Address + " (" + ((IPEndPoint)remote).Port + ")");
string messageString = "";
for (int i = 0; i < size; ++i)
{
messageString += (int)message[i] + " ";
}
Debug.Print(messageString);
OtpInputStream inStream = new OtpInputStream(message);
OtpErlangObject msg = inStream.read_any();
Debug.Print(msg.ToString());
OtpErlangTuple t = new OtpErlangTuple(new OtpErlangObject[] { new OtpErlangAtom("ok"), msg });
OtpOutputStream outStream = new OtpOutputStream(t, false);
byte[] answer = outStream.GetBuffer();
this.socket.SendTo(answer, remote);
Debug.Print(t.ToString());
}
}
private async Task Names_R4(IOtpTransport socket)
{
try
{
if (traceLevel >= traceThreshold)
{
Logger.Debug("<- NAMES(r4) ");
}
OtpOutputStream obuf = new OtpOutputStream();
obuf.Write4BE(EpmdPort);
foreach (var node in portmap.Values)
{
byte[] bytes = Encoding.GetEncoding("ISO-8859-1").GetBytes($"name {node.Alive} at port {node.Port}\n");
obuf.WriteN(bytes);
Logger.Debug($"-> name {node.Alive} at port {node.Port}");
}
await obuf.WriteToAsync(socket.OutputStream);
}
catch (IOException e)
{
if (traceLevel >= traceThreshold)
{
Logger.Debug("<- (no response)");
}
throw new IOException("Request not responding", e);
}
}
protected void SendChallenge(long her_flags, long our_flags, int challenge)
{
OtpOutputStream obuf = new OtpOutputStream();
string str = Local.Node;
if ((her_flags & AbstractNode.dFlagHandshake23) == 0)
{
obuf.Write2BE(1 + 2 + 4 + 4 + str.Length);
obuf.Write1('n');
obuf.Write2BE(5);
obuf.Write4BE(our_flags & 0xffffffff);
obuf.Write4BE(challenge);
obuf.Write(Encoding.GetEncoding("ISO-8859-1").GetBytes(str));
}
else
{
obuf.Write2BE(1 + 8 + 4 + 4 + 2 + str.Length);
obuf.Write1('N');
obuf.Write8BE(our_flags);
obuf.Write4BE(challenge);
obuf.Write4BE(Local.Creation);
obuf.Write2BE(str.Length);
obuf.Write(Encoding.GetEncoding("ISO-8859-1").GetBytes(str));
}
obuf.WriteTo(socket.OutputStream);
if (TraceLevel >= TraceHandshake)
{
Logger.Debug($"-> HANDSHAKE sendChallenge flags={our_flags} challenge={challenge} local={Local}");
}
}
public void WriteCompressed(IOtpErlangObject o, CompressionLevel level)
{
try
{
OtpOutputStream oos = new OtpOutputStream(o);
if (oos.Length < 5)
{
oos.WriteTo(this);
}
else
{
Write1(OtpExternal.compressedTag);
Write4BE(oos.Length);
DeflateStream dos = new DeflateStream(this, level, true);
oos.WriteTo(dos);
dos.Close();
}
}
catch (ObjectDisposedException)
{
throw new ArgumentException("Intermediate stream failed for Erlang object " + o);
}
catch (IOException)
{
throw new ArgumentException("Intermediate stream failed for Erlang object " + o);
}
}
/**
* Send a pre-encoded message to a process on a remote node.
*/
protected void SendBuf(OtpErlangPid from, OtpErlangPid dest, OtpOutputStream payload)
{
if (!Connected)
{
throw new IOException("Not connected");
}
OtpOutputStream header = new OtpOutputStream(headerLen);
// preamble: 4 byte length + "passthrough" tag + version
header.Write4BE(0); // reserve space for length
header.Write1(passThrough);
header.Write1(version);
// header info
header.WriteTupleHead(3);
header.WriteLong(sendTag);
if (sendCookie)
{
header.WriteAtom(Local.Cookie);
}
else
{
header.WriteAtom("");
}
header.WriteAny(dest);
// version for payload
header.Write1(version);
// fix up length in preamble
header.Poke4BE(0, header.Length + payload.Length - 4);
DoSend(header, payload);
}
/**
* Send an exit signal to a remote process.
* Used internally when "processes" terminate
*/
private void SendExit(int tag, OtpErlangPid from, OtpErlangPid dest, IOtpErlangObject reason)
{
if (!Connected)
{
throw new IOException("Not connected");
}
OtpOutputStream header = new OtpOutputStream(headerLen);
// preamble: 4 byte length + "passthrough" tag
header.Write4BE(0); // reserve space for length
header.Write1(passThrough);
header.Write1(version);
// header
header.WriteTupleHead(4);
header.WriteLong(tag);
header.WriteAny(from);
header.WriteAny(dest);
header.WriteAny(reason);
// fix up length in preamble
header.Poke4BE(0, header.Length - 4);
DoSend(header);
}
protected int SendName(int dist, long aflags, int creation)
{
OtpOutputStream obuf = new OtpOutputStream();
string str = Local.Node;
int nameTag = (dist == 5 ? 'n' : 'N');
if (dist == 5)
{
obuf.Write2BE(1 + 2 + 4 + str.Length);
obuf.Write1(nameTag);
obuf.Write2BE(dist);
obuf.Write4BE(aflags);
obuf.Write(Encoding.GetEncoding("ISO-8859-1").GetBytes(str));
}
else
{
obuf.Write2BE(1 + 8 + 4 + 2 + str.Length);
obuf.Write1(nameTag);
obuf.Write8BE(aflags);
obuf.Write4BE(creation);
obuf.Write2BE(str.Length);
obuf.Write(Encoding.GetEncoding("ISO-8859-1").GetBytes(str));
}
obuf.WriteTo(socket.OutputStream);
if (TraceLevel >= TraceHandshake)
{
Logger.Debug($"-> HANDSHAKE sendName flags={aflags} dist={dist} local={Local}");
}
return(nameTag);
}
public void Encode(OtpOutputStream buf)
{
buf.WriteMapHead(Arity);
foreach (var pair in this)
{
buf.WriteAny(pair.Key);
buf.WriteAny(pair.Value);
}
}
private async Task Port_R4(IOtpTransport socket, OtpInputStream ibuf)
{
try
{
int len = (int)(ibuf.Length - 1);
byte[] alive = ibuf.ReadN(len);
string name = OtpErlangString.FromEncoding(alive);
if (traceLevel >= traceThreshold)
{
Logger.Debug($"<- PORT (r4) {name}");
}
if (!portmap.TryGetValue(name, out AbstractNode node))
{
node = null;
}
OtpOutputStream obuf = new OtpOutputStream();
if (node != null)
{
obuf.Write1(port4resp);
obuf.Write1(0);
obuf.Write2BE(node.Port);
obuf.Write1(node.Type);
obuf.Write1(node.Proto);
obuf.Write2BE(node.DistHigh);
obuf.Write2BE(node.DistLow);
obuf.Write2BE(len);
obuf.WriteN(alive);
obuf.Write2BE(0);
if (traceLevel >= traceThreshold)
{
Logger.Debug("-> 0 (success)");
}
}
else
{
obuf.Write1(port4resp);
obuf.Write1(1);
if (traceLevel >= traceThreshold)
{
Logger.Debug("-> 1 (failure)");
}
}
await obuf.WriteToAsync(socket.OutputStream);
}
catch (IOException e)
{
if (traceLevel >= traceThreshold)
{
Logger.Debug("<- (no response)");
}
throw new IOException("Request not responding", e);
}
}
/**
* Send an auth error to peer because he sent a bad cookie. The auth error
* uses his cookie (not revealing ours). This is just like send_reg
* otherwise
*/
protected void CookieError(OtpLocalNode local, OtpErlangAtom cookie)
{
try
{
OtpOutputStream header = new OtpOutputStream(headerLen);
// preamble: 4 byte length + "passthrough" tag + version
header.Write4BE(0); // reserve space for length
header.Write1(passThrough);
header.Write1(version);
header.WriteTupleHead(4);
header.WriteLong(regSendTag);
header.WriteAny(local.CreatePid()); // disposable pid
header.WriteAtom(cookie.Value); // important: his cookie,
// not mine...
header.WriteAtom("auth");
// version for payload
header.Write1(version);
// the payload
// the no_auth message (copied from Erlang) Don't change this
// (Erlang will crash)
// {$gen_cast, {print, "~n** Unauthorized cookie ~w **~n",
// [foo@aule]}}
IOtpErlangObject[] msg = new IOtpErlangObject[2];
IOtpErlangObject[] msgbody = new IOtpErlangObject[3];
msgbody[0] = new OtpErlangAtom("print");
msgbody[1] = new OtpErlangString("~n** Bad cookie sent to " + local + " **~n");
// Erlang will crash and burn if there is no third argument here...
msgbody[2] = new OtpErlangList(); // empty list
msg[0] = new OtpErlangAtom("$gen_cast");
msg[1] = new OtpErlangTuple(msgbody);
OtpOutputStream payload = new OtpOutputStream(new OtpErlangTuple(msg));
// fix up length in preamble
header.Poke4BE(0, header.Length + payload.Length - 4);
try { DoSend(header, payload); }
catch (IOException) { } // ignore
}
finally
{
Close();
}
throw new OtpAuthException("Remote cookie not authorized: " + cookie.Value);
}
/**
* Convert this number to the equivalent Erlang external representation.
*
* @param buf
* an output stream to which the encoded number should be
* written.
*/
public override void encode(OtpOutputStream buf)
{
if (!BigIntegerIsNull(bigVal))
{
buf.write_big_integer(bigVal);
}
else
{
buf.write_long(val);
}
}
private void r4_port(TcpClient s, OtpInputStream ibuf)
{
try
{
int len = (int)(ibuf.Length - 1);
byte[] alive = new byte[len];
ibuf.readN(alive);
String name = OtpErlangString.newString(alive);
OtpPublishedNode node = null;
if (traceLevel >= traceThreshold)
{
log.Debug("<- PORT (r4) " + name);
}
lock (portmap)
{
if (portmap.ContainsKey(name))
{
node = portmap[name];
}
}
OtpOutputStream obuf = new OtpOutputStream();
if (node != null)
{
obuf.write1(port4resp);
obuf.write1(0);
obuf.write2BE(node.Port);
obuf.write1(node.Type);
obuf.write1(node.Proto);
obuf.write2BE(node.DistHigh);
obuf.write2BE(node.DistLow);
obuf.write2BE(len);
obuf.writeN(alive);
obuf.write2BE(0);
}
else
{
obuf.write1(port4resp);
obuf.write1(1);
}
obuf.WriteTo(s.GetStream());
}
catch (IOException)
{
if (traceLevel >= traceThreshold)
{
log.Debug("<- (no response)");
}
throw new IOException("Request not responding");
}
return;
}
/**
* Convert this tuple to the equivalent Erlang external representation.
*
* @param buf
* an output stream to which the encoded tuple should be
* written.
*/
public override void encode(OtpOutputStream buf)
{
int arity = elems.Length;
buf.write_tuple_head(arity);
for (int i = 0; i < arity; i++)
{
buf.write_any(elems[i]);
}
}
private void r4_publish(TcpClient s, OtpInputStream ibuf)
{
try
{
int port = ibuf.read2BE();
int type = ibuf.read1();
int proto = ibuf.read1();
int distHigh = ibuf.read2BE();
int distLow = ibuf.read2BE();
int len = ibuf.read2BE();
byte[] alive = new byte[len];
ibuf.readN(alive);
int elen = ibuf.read2BE();
byte[] extra = new byte[elen];
ibuf.readN(extra);
String name = OtpErlangString.newString(alive);
OtpPublishedNode node = new OtpPublishedNode(name);
node.Type = type;
node.DistHigh = distHigh;
node.DistLow = distLow;
node.Proto = proto;
node.Port = port;
if (traceLevel >= traceThreshold)
{
log.Debug("<- PUBLISH (r4) " + name + " port=" + node.Port);
}
OtpOutputStream obuf = new OtpOutputStream();
obuf.write1(publish4resp);
obuf.write1(0);
obuf.write2BE(epmd.Creation);
obuf.WriteTo(s.GetStream());
lock (portmap)
{
portmap.Add(name, node);
}
publishedPort.Add(name);
}
catch (IOException)
{
if (traceLevel >= traceThreshold)
{
log.Debug("<- (no response)");
}
throw new IOException("Request not responding");
}
return;
}
protected void SendStatus(string status)
{
OtpOutputStream obuf = new OtpOutputStream();
obuf.Write2BE(status.Length + 1);
obuf.Write1(ChallengeStatus);
obuf.Write(Encoding.GetEncoding("ISO-8859-1").GetBytes(status));
obuf.WriteTo(socket.OutputStream);
if (TraceLevel >= TraceHandshake)
{
Logger.Debug($"-> HANDSHAKE sendStatus status={status} local={Local}");
}
}
protected void SendChallengeAck(byte[] digest)
{
OtpOutputStream obuf = new OtpOutputStream();
obuf.Write2BE(17);
obuf.Write1(ChallengeAck);
obuf.Write(digest);
obuf.WriteTo(socket.OutputStream);
if (TraceLevel >= TraceHandshake)
{
Logger.Debug($"-> HANDSHAKE sendChallengeAck digest={Hex(digest)} local={Local}");
}
}
protected void SendChallengeReply(int challenge, byte[] digest)
{
OtpOutputStream obuf = new OtpOutputStream();
obuf.Write2BE(21);
obuf.Write1(ChallengeReply);
obuf.Write4BE(challenge);
obuf.Write(digest);
obuf.WriteTo(socket.OutputStream);
if (TraceLevel >= TraceHandshake)
{
Logger.Debug($"-> HANDSHAKE sendChallengeReply challenge={challenge} digest={Hex(digest)} local={Local}");
}
}
/**
* Write an arbitrary Erlang term to the stream in compressed format.
*
* @param o
* the Erlang tem to write.
*/
public void write_compressed(OtpErlangObject o)
{
OtpOutputStream oos = new OtpOutputStream(o);
write1(OtpExternal.compressedTag);
write4BE(oos.Length);
DeflateStream dos = new DeflateStream(this, CompressionMode.Compress, true);
try
{
oos.WriteTo(dos);
dos.Close();
}
catch (ObjectDisposedException)
{
throw new ArgumentException("Intremediate stream failed for Erlang object " + o);
}
}
private async Task <string> Publish_R4(IOtpTransport socket, OtpInputStream ibuf)
{
try
{
int port = ibuf.Read2BE();
int type = ibuf.Read1();
int proto = ibuf.Read1();
int distHigh = ibuf.Read2BE();
int distLow = ibuf.Read2BE();
string name = ibuf.ReadStringData();
ibuf.ReadStringData(); // extra
AbstractNode node = new AbstractNode()
{
Node = name,
Port = port,
Type = type,
DistHigh = distHigh,
DistLow = distLow,
Proto = proto
};
if (traceLevel >= traceThreshold)
{
Logger.Debug($"<- PUBLISH (r4) {name} port={node.Port}");
}
OtpOutputStream obuf = new OtpOutputStream();
obuf.Write1(ALIVE2_RESP);
obuf.Write1(0);
obuf.Write2BE(NextCreation());
await obuf.WriteToAsync(socket.OutputStream);
portmap.TryAdd(name, node);
return(name);
}
catch (IOException e)
{
if (traceLevel >= traceThreshold)
{
Logger.Debug("<- (no response)");
}
throw new IOException("Request not responding", e);
}
}
protected void SendComplement(int nameTag)
{
if (nameTag == 'n' && (Peer.CapFlags & AbstractNode.dFlagHandshake23) != 0)
{
OtpOutputStream obuf = new OtpOutputStream();
obuf.Write2BE(1 + 4 + 4);
obuf.Write1('c');
int flagsHigh = (int)(Local.CapFlags >> 32);
obuf.Write4BE(flagsHigh);
obuf.Write4BE(Local.Creation);
obuf.WriteTo(socket.OutputStream);
if (TraceLevel >= TraceHandshake)
{
Logger.Debug($"-> HANDSHAKE sendComplement flagsHigh={flagsHigh} creation={Local.Creation}");
}
}
}
protected void encode(OtpOutputStream buf, int start)
{
int arity = this.arity() - start;
if (arity > 0)
{
buf.write_list_head(arity);
for (int i = start; i < arity + start; i++)
{
buf.write_any(elems[i]);
}
}
if (lastTail == null)
{
buf.write_nil();
}
else
{
buf.write_any(lastTail);
}
}
// Ask epmd to close his end of the connection.
// Caller should close his epmd socket as well.
// This method is pretty forgiving...
/**
* Unregister from Epmd. Other nodes wishing to connect will no longer be
* able to.
*
* <p>
* This method does not report any failures.
*/
public static void unPublishPort(OtpLocalNode node)
{
try
{
using (TcpClient s = new TcpClient(Dns.GetHostName(), EpmdPort.get()))
{
OtpOutputStream obuf = new OtpOutputStream();
obuf.write2BE(node.Alive.Length + 1);
obuf.write1(stopReq);
obuf.writeN(Encoding.GetEncoding("iso-8859-1").GetBytes(node.Alive));
obuf.WriteTo(s.GetStream());
// don't even wait for a response (is there one?)
if (traceLevel >= traceThreshold)
{
log.Debug("-> UNPUBLISH " + node + " port=" + node.Port);
log.Debug("<- OK (assumed)");
}
}
}
catch (Exception) /* ignore all failures */
{
}
}
protected void sendChallengeReply(int challenge, byte[] digest)
{
OtpOutputStream obuf = new OtpOutputStream();
obuf.write2BE(21);
obuf.write1(ChallengeReply);
obuf.write4BE(challenge);
obuf.write(digest);
obuf.WriteTo(socket.GetOutputStream());
if (traceLevel >= handshakeThreshold)
{
log.Debug("-> " + "HANDSHAKE sendChallengeReply"
+ " challenge=" + challenge + " digest=" + hex(digest)
+ " local=" + self);
}
}
protected void sendStatus(String status)
{
OtpOutputStream obuf = new OtpOutputStream();
obuf.write2BE(status.Length + 1);
obuf.write1(ChallengeStatus);
obuf.write(Encoding.GetEncoding("iso-8859-1").GetBytes(status));
obuf.WriteTo(socket.GetOutputStream());
if (traceLevel >= handshakeThreshold)
{
log.Debug("-> " + "HANDSHAKE sendStatus" + " status="
+ status + " local=" + self);
}
}
private void sendExit(int tag, OtpErlangPid from, OtpErlangPid dest, OtpErlangObject reason)
{
if (!connected)
{
throw new IOException("Not connected");
}
OtpOutputStream header = new OtpOutputStream(headerLen);
// preamble: 4 byte length + "passthrough" tag
header.write4BE(0); // reserve space for length
header.write1(passThrough);
header.write1(version);
// header
header.write_tuple_head(4);
header.write_long(tag);
header.write_any(from);
header.write_any(dest);
header.write_any(reason);
// fix up length in preamble
header.poke4BE(0, header.size() - 4);
do_send(header);
}
// used by the other message types
protected void do_send(OtpOutputStream header)
{
lock (this)
{
try
{
if (traceLevel >= ctrlThreshold)
{
try
{
OtpErlangObject h = header.getOtpInputStream(5).read_any();
log.Debug("-> " + headerType(h) + " " + h);
}
catch (OtpErlangDecodeException e)
{
log.Debug(" " + "can't decode output buffer: " + e);
}
}
header.WriteTo(socket.GetOutputStream());
}
catch (IOException e)
{
close();
throw e;
}
}
}
/**
* Convert this atom to the equivalent Erlang external representation.
*
* @param buf
* an output stream to which the encoded atom should be
* written.
*/
public override void encode(OtpOutputStream buf)
{
buf.write_atom(atom);
}
/**
* Convert this number to the equivalent Erlang external representation.
*
* @param buf
* an output stream to which the encoded number should be
* written.
*/
public override void encode(OtpOutputStream buf)
{
if (!BigIntegerIsNull(bigVal))
{
buf.write_big_integer(bigVal);
}
else
{
buf.write_long(val);
}
}
/**
* Convert this tuple to the equivalent Erlang external representation.
*
* @param buf
* an output stream to which the encoded tuple should be
* written.
*/
public override void encode(OtpOutputStream buf)
{
int arity = elems.Length;
buf.write_tuple_head(arity);
for (int i = 0; i < arity; i++)
{
buf.write_any(elems[i]);
}
}
/**
* Convert this double to the equivalent Erlang external representation.
*
* @param buf
* an output stream to which the encoded value should be
* written.
*/
public override void encode(OtpOutputStream buf)
{
buf.write_double(d);
}
public override void encode(OtpOutputStream buf)
{
buf.write_fun(pid, module, old_index, arity, md5, index, uniq,
freeVars);
}
private void r4_publish(TcpClient s, OtpInputStream ibuf)
{
try
{
int port = ibuf.read2BE();
int type = ibuf.read1();
int proto = ibuf.read1();
int distHigh = ibuf.read2BE();
int distLow = ibuf.read2BE();
int len = ibuf.read2BE();
byte[] alive = new byte[len];
ibuf.readN(alive);
int elen = ibuf.read2BE();
byte[] extra = new byte[elen];
ibuf.readN(extra);
String name = OtpErlangString.newString(alive);
OtpPublishedNode node = new OtpPublishedNode(name);
node.Type = type;
node.DistHigh = distHigh;
node.DistLow = distLow;
node.Proto = proto;
node.Port = port;
if (traceLevel >= traceThreshold)
{
log.Debug("<- PUBLISH (r4) " + name + " port=" + node.Port);
}
OtpOutputStream obuf = new OtpOutputStream();
obuf.write1(publish4resp);
obuf.write1(0);
obuf.write2BE(epmd.Creation);
obuf.WriteTo(s.GetStream());
lock (portmap)
{
portmap.Add(name, node);
}
publishedPort.Add(name);
}
catch (IOException)
{
if (traceLevel >= traceThreshold)
{
log.Debug("<- (no response)");
}
throw new IOException("Request not responding");
}
return;
}
/**
* Convert this number to the equivalent Erlang external representation.
*
* @param buf
* an output stream to which the encoded number should be
* written.
*/
public override void encode(OtpOutputStream buf)
{
buf.write_long(val);
}
/**
* Convert this list to the equivalent Erlang external representation. Note
* that this method never encodes lists as strings, even when it is possible
* to do so.
*
* @param buf
* An output stream to which the encoded list should be written.
*
*/
public override void encode(OtpOutputStream buf)
{
encode(buf, 0);
}
protected void encode(OtpOutputStream buf, int start)
{
int arity = this.arity() - start;
if (arity > 0)
{
buf.write_list_head(arity);
for (int i = start; i < arity + start; i++)
{
buf.write_any(elems[i]);
}
}
if (lastTail == null)
{
buf.write_nil();
}
else
{
buf.write_any(lastTail);
}
}
public override void encode(OtpOutputStream stream)
{
parent.encode(stream, start);
}
/**
* Send a pre-encoded message to a process on a remote node.
*
* @param dest
* the Erlang PID of the remote process.
* @param msg
* the encoded message to send.
*
* @exception java.io.IOException
* if the connection is not active or a communication error
* occurs.
*/
protected void sendBuf(OtpErlangPid from, OtpErlangPid dest, OtpOutputStream payload)
{
if (!connected)
{
throw new IOException("Not connected");
}
OtpOutputStream header = new OtpOutputStream(headerLen);
// preamble: 4 byte length + "passthrough" tag + version
header.write4BE(0); // reserve space for length
header.write1(passThrough);
header.write1(version);
// header info
header.write_tuple_head(3);
header.write_long(sendTag);
if (sendCookie)
{
header.write_atom(self.Cookie);
}
else
{
header.write_atom("");
}
header.write_any(dest);
// version for payload
header.write1(version);
// fix up length in preamble
header.poke4BE(0, header.size() + payload.size() - 4);
do_send(header, payload);
}
/** * Convert the object according to the rules of the Erlang external format. * This is mainly used for sending Erlang terms in messages, however it can * also be used for storing terms to disk. * * @param buf * an output stream to which the encoded term should be * written. */ public abstract void encode(OtpOutputStream buf);
private void r4_port(TcpClient s, OtpInputStream ibuf)
{
try
{
int len = (int)(ibuf.Length - 1);
byte[] alive = new byte[len];
ibuf.readN(alive);
String name = OtpErlangString.newString(alive);
OtpPublishedNode node = null;
if (traceLevel >= traceThreshold)
{
log.Debug("<- PORT (r4) " + name);
}
lock (portmap)
{
if (portmap.ContainsKey(name))
{
node = portmap[name];
}
}
OtpOutputStream obuf = new OtpOutputStream();
if (node != null)
{
obuf.write1(port4resp);
obuf.write1(0);
obuf.write2BE(node.Port);
obuf.write1(node.Type);
obuf.write1(node.Proto);
obuf.write2BE(node.DistHigh);
obuf.write2BE(node.DistLow);
obuf.write2BE(len);
obuf.writeN(alive);
obuf.write2BE(0);
}
else
{
obuf.write1(port4resp);
obuf.write1(1);
}
obuf.WriteTo(s.GetStream());
}
catch (IOException)
{
if (traceLevel >= traceThreshold)
{
log.Debug("<- (no response)");
}
throw new IOException("Request not responding");
}
return;
}
/** * Convert this port to the equivalent Erlang external representation. */ public void Encode(OtpOutputStream buf) => buf.WritePort(this);
private static int r4_lookupPort(AbstractNode node)
{
int port = 0;
try
{
OtpOutputStream obuf = new OtpOutputStream();
using (TcpClient s = new TcpClient(node.Host, EpmdPort.get()))
{
// build and send epmd request
// length[2], tag[1], alivename[n] (length = n+1)
obuf.write2BE(node.Alive.Length + 1);
obuf.write1(port4req);
obuf.writeN(Encoding.GetEncoding("iso-8859-1").GetBytes(node.Alive));
// send request
obuf.WriteTo(s.GetStream());
if (traceLevel >= traceThreshold)
{
log.Debug("-> LOOKUP (r4) " + node);
}
// receive and decode reply
// resptag[1], result[1], port[2], ntype[1], proto[1],
// disthigh[2], distlow[2], nlen[2], alivename[n],
// elen[2], edata[m]
byte[] tmpbuf = new byte[100];
int n = s.GetStream().Read(tmpbuf, 0, tmpbuf.Length);
if (n < 0)
{
// this was an r3 node => not a failure (yet)
throw new IOException("Nameserver not responding on "
+ node.Host + " when looking up " + node.Alive);
}
OtpInputStream ibuf = new OtpInputStream(tmpbuf, 0);
int response = ibuf.read1();
if (response == port4resp)
{
int result = ibuf.read1();
if (result == 0)
{
port = ibuf.read2BE();
node.Type = ibuf.read1();
node.Proto = ibuf.read1();
node.DistHigh = ibuf.read2BE();
node.DistLow = ibuf.read2BE();
// ignore rest of fields
}
}
}
}
catch (SocketException)
{
if (traceLevel >= traceThreshold)
{
log.Debug("<- (no response)");
}
throw new IOException("Nameserver not responding on " + node.Host);
}
catch (IOException)
{
if (traceLevel >= traceThreshold)
{
log.Debug("<- (no response)");
}
throw new IOException("Nameserver not responding on " + node.Host
+ " when looking up " + node.Alive);
}
catch (OtpErlangDecodeException)
{
if (traceLevel >= traceThreshold)
{
log.Debug("<- (invalid response)");
}
throw new IOException("Nameserver not responding on " + node.Host
+ " when looking up " + node.Alive);
}
if (traceLevel >= traceThreshold)
{
if (port == 0)
{
log.Debug("<- NOT FOUND");
}
else
{
log.Debug("<- PORT " + port);
}
}
return(port);
}
/**
* Convert this bitstr to the equivalent Erlang external representation.
*
* @param buf
* an output stream to which the encoded bitstr should be
* written.
*/
public override void encode(OtpOutputStream buf)
{
buf.write_bitstr(bin, pad_bits);
}
private static TcpClient r3_publish(OtpLocalNode node)
{
TcpClient s;
try
{
OtpOutputStream obuf = new OtpOutputStream();
s = new TcpClient(node.Host, EpmdPort.get());
obuf.write2BE(node.Alive.Length + 3);
obuf.write1(publish3req);
obuf.write2BE(node.Port);
obuf.writeN(Encoding.GetEncoding("iso-8859-1").GetBytes(node.Alive));
// send request
obuf.WriteTo(s.GetStream());
if (traceLevel >= traceThreshold)
{
log.Debug("-> PUBLISH (r3) " + node + " port=" + node.Port);
}
byte[] tmpbuf = new byte[100];
int n = s.GetStream().Read(tmpbuf, 0, tmpbuf.Length);
if (n < 0)
{
if (traceLevel >= traceThreshold)
{
log.Debug("<- (no response)");
}
return(null);
}
OtpInputStream ibuf = new OtpInputStream(tmpbuf, 0);
if (ibuf.read1() == publish3ok)
{
node.Creation = ibuf.read2BE();
if (traceLevel >= traceThreshold)
{
log.Debug("<- OK");
}
return(s); // success - don't close socket
}
}
catch (SocketException)
{
if (traceLevel >= traceThreshold)
{
log.Debug("<- (no response)");
}
throw new IOException("Nameserver not responding on " + node.Host);
}
catch (IOException)
{
// epmd closed the connection = fail
if (traceLevel >= traceThreshold)
{
log.Debug("<- (no response)");
}
throw new IOException("Nameserver not responding on " + node.Host
+ " when publishing " + node.Alive);
}
catch (OtpErlangDecodeException)
{
if (traceLevel >= traceThreshold)
{
log.Debug("<- (invalid response)");
}
throw new IOException("Nameserver not responding on " + node.Host
+ " when publishing " + node.Alive);
}
return(null); // failure
}
/**
* Convert this PID to the equivalent Erlang external representation.
*
* @param buf
* an output stream to which the encoded PID should be
* written.
*/
public override void encode(OtpOutputStream buf)
{
buf.write_pid(node, id, serial, creation);
}
/*
* this function will get an exception if it tries to talk to an r3 epmd, or
* if something else happens that it cannot forsee. In both cases we return
* an exception (and the caller should try again, using the r3 protocol). If
* we manage to successfully communicate with an r4 epmd, we return either
* the socket, or null, depending on the result.
*/
private static TcpClient r4_publish(OtpLocalNode node)
{
TcpClient s = null;
try
{
OtpOutputStream obuf = new OtpOutputStream();
s = new TcpClient(node.Host, EpmdPort.get());
obuf.write2BE(node.Alive.Length + 13);
obuf.write1(publish4req);
obuf.write2BE(node.Port);
obuf.write1(node.Type);
obuf.write1(node.Proto);
obuf.write2BE(node.DistHigh);
obuf.write2BE(node.DistLow);
obuf.write2BE(node.Alive.Length);
obuf.writeN(Encoding.GetEncoding("iso-8859-1").GetBytes(node.Alive));
obuf.write2BE(0); // No extra
// send request
obuf.WriteTo(s.GetStream());
if (traceLevel >= traceThreshold)
{
log.Debug("-> PUBLISH (r4) " + node + " port=" + node.Port);
}
// get reply
byte[] tmpbuf = new byte[100];
int n = s.GetStream().Read(tmpbuf, 0, tmpbuf.Length);
if (n < 0)
{
// this was an r3 node => not a failure (yet)
if (s != null)
{
s.Close();
}
throw new IOException("Nameserver not responding on "
+ node.Host + " when publishing " + node.Alive);
}
OtpInputStream ibuf = new OtpInputStream(tmpbuf, 0);
int response = ibuf.read1();
if (response == publish4resp)
{
int result = ibuf.read1();
if (result == 0)
{
node.Creation = ibuf.read2BE();
if (traceLevel >= traceThreshold)
{
log.Debug("<- OK");
}
return(s); // success
}
}
}
catch (SocketException)
{
if (traceLevel >= traceThreshold)
{
log.Debug("<- (no response)");
}
throw new IOException("Nameserver not responding on " + node.Host);
}
catch (IOException)
{
// epmd closed the connection = fail
if (s != null)
{
s.Close();
}
if (traceLevel >= traceThreshold)
{
log.Debug("<- (no response)");
}
throw new IOException("Nameserver not responding on " + node.Host
+ " when publishing " + node.Alive);
}
catch (OtpErlangDecodeException)
{
if (s != null)
{
s.Close();
}
if (traceLevel >= traceThreshold)
{
log.Debug("<- (invalid response)");
}
throw new IOException("Nameserver not responding on " + node.Host
+ " when publishing " + node.Alive);
}
if (s != null)
{
s.Close();
}
return(null);
}
// used by send and send_reg (message types with payload)
protected void do_send(OtpOutputStream header, OtpOutputStream payload)
{
lock (this)
{
try
{
if (traceLevel >= sendThreshold)
{
// Need to decode header and output buffer to show trace
// message!
// First make OtpInputStream, then decode.
try
{
OtpErlangObject h = header.getOtpInputStream(5).read_any();
log.Debug("-> " + headerType(h) + " " + h);
OtpErlangObject o = payload.getOtpInputStream(0).read_any();
log.Debug(" " + o);
o = null;
}
catch (OtpErlangDecodeException e)
{
log.Debug(" " + "can't decode output buffer:" + e);
}
}
header.WriteTo(socket.GetOutputStream());
payload.WriteTo(socket.GetOutputStream());
}
catch (IOException e)
{
close();
throw e;
}
}
}
public static String[] lookupNames(IPAddress address)
{
try
{
OtpOutputStream obuf = new OtpOutputStream();
using (TcpClient s = new TcpClient(address.ToString(), EpmdPort.get()))
{
obuf.write2BE(1);
obuf.write1(names4req);
// send request
obuf.WriteTo(s.GetStream());
if (traceLevel >= traceThreshold)
{
log.Debug("-> NAMES (r4) ");
}
// get reply
byte[] buffer = new byte[256];
MemoryStream ms = new MemoryStream(256);
while (true)
{
int bytesRead = s.GetStream().Read(buffer, 0, buffer.Length);
if (bytesRead == -1)
{
break;
}
ms.Write(buffer, 0, bytesRead);
}
byte[] tmpbuf = ms.GetBuffer();
OtpInputStream ibuf = new OtpInputStream(tmpbuf, 0);
ibuf.read4BE(); // read port int
// int port = ibuf.read4BE();
// check if port = epmdPort
int n = tmpbuf.Length;
byte[] buf = new byte[n - 4];
Array.Copy(tmpbuf, 4, buf, 0, n - 4);
String all = OtpErlangString.newString(buf);
return(all.Split(new char[] { '\n' }));
}
}
catch (SocketException)
{
if (traceLevel >= traceThreshold)
{
log.Debug("<- (no response)");
}
throw new IOException("Nameserver not responding on " + address);
}
catch (IOException)
{
if (traceLevel >= traceThreshold)
{
log.Debug("<- (no response)");
}
throw new IOException("Nameserver not responding when requesting names");
}
catch (OtpErlangDecodeException)
{
if (traceLevel >= traceThreshold)
{
log.Debug("<- (invalid response)");
}
throw new IOException("Nameserver not responding when requesting names");
}
}
/*
* 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
*/
private void cookieError(OtpLocalNode local, OtpErlangAtom cookie)
{
try
{
OtpOutputStream header = new OtpOutputStream(headerLen);
// preamble: 4 byte length + "passthrough" tag + version
header.write4BE(0); // reserve space for length
header.write1(passThrough);
header.write1(version);
header.write_tuple_head(4);
header.write_long(regSendTag);
header.write_any(local.createPid()); // disposable pid
header.write_atom(cookie.atomValue()); // important: his cookie,
// not mine...
header.write_atom("auth");
// version for payload
header.write1(version);
// the payload
// the no_auth message (copied from Erlang) Don't change this
// (Erlang will crash)
// {$gen_cast, {print, "~n** Unauthorized cookie ~w **~n",
// [foo@aule]}}
OtpErlangObject[] msg = new OtpErlangObject[2];
OtpErlangObject[] msgbody = new OtpErlangObject[3];
msgbody[0] = new OtpErlangAtom("print");
msgbody[1] = new OtpErlangString("~n** Bad cookie sent to " + local + " **~n");
// Erlang will crash and burn if there is no third argument here...
msgbody[2] = new OtpErlangList(); // empty list
msg[0] = new OtpErlangAtom("$gen_cast");
msg[1] = new OtpErlangTuple(msgbody);
OtpOutputStream payload = new OtpOutputStream(new OtpErlangTuple(msg));
// fix up length in preamble
header.poke4BE(0, header.size() + payload.size() - 4);
try
{
do_send(header, payload);
}
catch (IOException)
{
} // ignore
}
finally
{
close();
}
throw new OtpAuthException("Remote cookie not authorized: " + cookie.atomValue());
}
private void r4_names(TcpClient s, OtpInputStream ibuf)
{
try
{
if (traceLevel >= traceThreshold)
{
log.Debug("<- NAMES(r4) ");
}
OtpOutputStream obuf = new OtpOutputStream();
obuf.write4BE(EpmdPort.get());
lock (portmap)
{
foreach (KeyValuePair<string, OtpPublishedNode> pair in portmap)
{
OtpPublishedNode node = pair.Value;
string info = String.Format("name {0} at port {1}\n", node.Alive, node.Port);
byte[] bytes = Encoding.GetEncoding("iso-8859-1").GetBytes(info);
obuf.writeN(bytes);
}
}
obuf.WriteTo(s.GetStream());
}
catch (IOException)
{
if (traceLevel >= traceThreshold)
{
log.Debug("<- (no response)");
}
throw new IOException("Request not responding");
}
return;
}
protected void sendName(int dist, int flags)
{
OtpOutputStream obuf = new OtpOutputStream();
String str = self.Node;
obuf.write2BE(str.Length + 7); // 7 bytes + nodename
obuf.write1(AbstractNode.NTYPE_R6);
obuf.write2BE(dist);
obuf.write4BE(flags);
obuf.write(Encoding.GetEncoding("iso-8859-1").GetBytes(str));
obuf.WriteTo(socket.GetOutputStream());
if (traceLevel >= handshakeThreshold)
{
log.Debug("-> " + "HANDSHAKE sendName" + " flags=" + flags
+ " dist=" + dist + " local=" + self);
}
}
/**
* Convert this string to the equivalent Erlang external representation.
*
* @param buf
* an output stream to which the encoded string should be
* written.
*/
public override void encode(OtpOutputStream buf)
{
buf.write_string(str);
}
protected void sendChallengeAck(byte[] digest)
{
OtpOutputStream obuf = new OtpOutputStream();
obuf.write2BE(17);
obuf.write1(ChallengeAck);
obuf.write(digest);
obuf.WriteTo(socket.GetOutputStream());
if (traceLevel >= handshakeThreshold)
{
log.Debug("-> " + "HANDSHAKE sendChallengeAck"
+ " digest=" + hex(digest) + " local=" + self);
}
}
/**
* Convert this binary to the equivalent Erlang external representation.
*
* @param buf
* an output stream to which the encoded binary should be
* written.
*/
public override void encode(OtpOutputStream buf)
{
buf.write_binary(bin);
}
/**
* Convert this binary to the equivalent Erlang external representation.
*
* @param buf
* an output stream to which the encoded binary should be
* written.
*/
public override void encode(OtpOutputStream buf)
{
buf.write_binary(bin);
}
/**
* Write an arbitrary Erlang term to the stream in compressed format.
*
* @param o
* the Erlang tem to write.
*/
public void write_compressed(OtpErlangObject o)
{
OtpOutputStream oos = new OtpOutputStream(o);
write1(OtpExternal.compressedTag);
write4BE(oos.Length);
DeflateStream dos = new DeflateStream(this, CompressionMode.Compress, true);
try
{
oos.WriteTo(dos);
dos.Close();
}
catch (ObjectDisposedException)
{
throw new ArgumentException("Intremediate stream failed for Erlang object " + o);
}
}
/**
* Convert this port to the equivalent Erlang external representation.
*
* @param buf
* an output stream to which the encoded port should be
* written.
*/
public override void encode(OtpOutputStream buf)
{
buf.write_port(node, id, creation);
}
/**
* Send a pre-encoded message to a process on a remote node.
*
* @param dest
* the Erlang PID of the remote process.
* @param msg
* the encoded message to send.
*
* @exception java.io.IOException
* if the connection is not active or a communication
* error occurs.
*/
public void sendBuf(OtpErlangPid dest, OtpOutputStream payload)
{
base.sendBuf(self.Pid, dest, payload);
}
