private static System.Net.Sockets.TcpClient r3_publish(OtpLocalNode node)
{
System.Net.Sockets.TcpClient s = null;
try
{
OtpOutputStream obuf = new OtpOutputStream();
s = new System.Net.Sockets.TcpClient(System.Net.Dns.GetHostName(), epmdPort);
obuf.write2BE(node.getAlive().Length + 3);
obuf.write1(publish3req);
obuf.write2BE(node.port());
//UPGRADE_NOTE: This code will be optimized in the future;
byte[] tmpBytes;
int i;
string tmpStr;
tmpStr = node.getAlive();
tmpBytes = new byte[tmpStr.Length];
i = 0;
while (i < tmpStr.Length)
{
tmpBytes[i] = (byte)tmpStr[i];
i++;
}
obuf.writeN(tmpBytes);
// send request
obuf.writeTo((System.IO.Stream)s.GetStream());
if (traceLevel >= traceThreshold)
{
OtpTrace.TraceEvent("-> PUBLISH (r3) " + node + " port=" + node.port());
}
byte[] tmpbuf = new byte[100];
int n = s.GetStream().Read(tmpbuf, 0, 100);
if (n < 0)
{
if (s != null)
{
s.Close();
}
if (traceLevel >= traceThreshold)
{
OtpTrace.TraceEvent("<- (no response)");
}
return(null);
}
OtpInputStream ibuf = new OtpInputStream(tmpbuf);
if (ibuf.read1() == publish3ok)
{
node._creation = ibuf.read2BE();
if (traceLevel >= traceThreshold)
{
OtpTrace.TraceEvent("<- OK");
}
return(s); // success - don't close socket
}
}
catch (System.IO.IOException)
{
// epmd closed the connection = fail
if (s != null)
{
s.Close();
}
if (traceLevel >= traceThreshold)
{
OtpTrace.TraceEvent("<- (no response)");
}
throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when publishing " + node.getAlive());
}
catch (Erlang.Exception)
{
if (s != null)
{
s.Close();
}
if (traceLevel >= traceThreshold)
{
OtpTrace.TraceEvent("<- (invalid response)");
}
throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when publishing " + node.getAlive());
}
if (s != null)
{
s.Close();
}
return(null); // failure
}
/*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 System.Net.Sockets.TcpClient r4_publish(OtpLocalNode node)
{
System.Net.Sockets.TcpClient s = null;
System.Exception error = null;
try
{
OtpOutputStream obuf = new OtpOutputStream();
s = new TcpClient(System.Net.Dns.GetHostName(), epmdPort);
obuf.write2BE(node.getAlive().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.getAlive().Length);
//UPGRADE_NOTE: This code will be optimized in the future;
byte[] tmpBytes;
int i;
string tmpStr;
tmpStr = node.getAlive();
tmpBytes = new byte[tmpStr.Length];
i = 0;
while (i < tmpStr.Length)
{
tmpBytes[i] = (byte)tmpStr[i];
i++;
}
obuf.writeN(tmpBytes);
obuf.write2BE(0); // No extra
// send request
obuf.writeTo((System.IO.Stream)s.GetStream());
if (traceLevel >= traceThreshold)
{
OtpTrace.TraceEvent("-> PUBLISH (r4) " + node + " port=" + node.port());
}
// get reply
byte[] tmpbuf = new byte[100];
int n = s.GetStream().Read(tmpbuf, 0, 100);
if (n < 0)
{
// this was an r3 node => not a failure (yet)
if (s != null)
{
s.Close();
}
throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when publishing " + node.getAlive());
}
OtpInputStream ibuf = new OtpInputStream(tmpbuf);
int response = ibuf.read1();
if (response == publish4resp)
{
int result = ibuf.read1();
if (result == 0)
{
node._creation = ibuf.read2BE();
if (traceLevel >= traceThreshold)
{
OtpTrace.TraceEvent("<- OK");
}
return(s); // success
}
}
}
catch (System.IO.IOException e)
{
error = e;
}
catch (Erlang.Exception e)
{
error = e;
}
catch (System.Net.Sockets.SocketException e)
{
error = e;
}
if (error == null)
{
return(s);
}
else
{
// epmd closed the connection = fail
if (s != null)
{
s.Close();
}
if (traceLevel >= traceThreshold)
{
System.Console.Out.WriteLine("<- (no response)");
}
string err = "Nameserver not responding on " + node.host() + " when publishing " + node.getAlive();
node.epmdFailedConnAttempt(node.node(), err);
if (traceLevel >= traceThreshold)
{
System.Console.Out.WriteLine("Failed to connect to empd daemon!");
}
if (!OtpLocalNode.ignoreLocalEpmdConnectErrors)
{
throw new System.Exception(err);
}
node._creation = 0;
return(null);
}
}
public virtual void Start()
{
if (!connected)
{
deliver(new System.IO.IOException("Not connected"));
return ;
}
byte[] lbuf = new byte[4];
OtpInputStream ibuf;
Erlang.Object traceobj;
int len;
byte[] tock = new byte[]{0, 0, 0, 0};
try
{
while (!done)
{
// don't return until we get a real message
// or a failure of some kind (e.g. EXIT)
// read length and read buffer must be atomic!
do
{
// read 4 bytes - get length of incoming packet
// socket.getInputStream().read(lbuf);
int n;
if ((n = readSock(socket, lbuf)) < lbuf.Length)
throw new System.Exception("Read " + n + " out of " + lbuf.Length + " bytes!");
ibuf = new OtpInputStream(lbuf);
len = ibuf.read4BE();
// received tick? send tock!
if (len == 0)
lock(this)
{
System.Byte[] temp_bytearray;
temp_bytearray = tock;
if (socket != null)
((System.IO.Stream) socket.GetStream()).Write(temp_bytearray, 0, temp_bytearray.Length);
}
}
while (len == 0); // tick_loop
// got a real message (maybe) - read len bytes
byte[] tmpbuf = new byte[len];
// i = socket.getInputStream().read(tmpbuf);
int m = readSock(socket, tmpbuf);
if (m < len)
throw new System.Exception("Read " + m + " out of " + len + " bytes!");
ibuf = new OtpInputStream(tmpbuf);
if (ibuf.read1() != passThrough)
{
goto receive_loop_brk;
}
// got a real message (really)
Erlang.Atom reason = null;
Erlang.Atom cookie = null;
Erlang.Object tmp = null;
Erlang.Tuple head = null;
Erlang.Atom toName;
Erlang.Pid to;
Erlang.Pid from;
Erlang.Ref eref;
// decode the header
tmp = ibuf.read_any();
if (!(tmp is Erlang.Tuple))
{
goto receive_loop_brk;
}
head = (Erlang.Tuple) tmp;
if (!(head.elementAt(0) is Erlang.Long))
{
goto receive_loop_brk;
}
// lets see what kind of message this is
OtpMsg.Tag tag = (OtpMsg.Tag)((Erlang.Long)(head.elementAt(0))).longValue();
switch (tag)
{
case OtpMsg.Tag.sendTag:
case OtpMsg.Tag.sendTTTag:
// { SEND, Cookie, ToPid, TraceToken }
if (!cookieOk)
{
// we only check this once, he can send us bad cookies later if he likes
if (!(head.elementAt(1) is Erlang.Atom))
{
goto receive_loop_brk;
}
cookie = (Erlang.Atom) head.elementAt(1);
if (sendCookie)
{
if (!cookie.atomValue().Equals(auth_cookie))
{
cookieError(self, cookie);
}
}
else
{
if (!cookie.atomValue().Equals(""))
{
cookieError(self, cookie);
}
}
cookieOk = true;
}
if (traceLevel >= OtpTrace.Type.sendThreshold)
{
OtpTrace.TraceEvent("<- " + headerType(head) + " " + head.ToString());
/*show received payload too */
long mark = ibuf.Position;
traceobj = ibuf.read_any();
if (traceobj != null)
OtpTrace.TraceEvent(" " + traceobj.ToString());
else
OtpTrace.TraceEvent(" (null)");
ibuf.Seek(mark, System.IO.SeekOrigin.Begin);
}
to = (Erlang.Pid) (head.elementAt(2));
deliver(new OtpMsg(to, ibuf));
break;
case OtpMsg.Tag.regSendTag:
case OtpMsg.Tag.regSendTTTag:
// { REG_SEND, FromPid, Cookie, ToName, TraceToken }
if (!cookieOk)
{
// we only check this once, he can send us bad cookies later if he likes
if (!(head.elementAt(2) is Erlang.Atom))
{
goto receive_loop_brk;
}
cookie = (Erlang.Atom) head.elementAt(2);
if (sendCookie)
{
if (!cookie.atomValue().Equals(auth_cookie))
{
cookieError(self, cookie);
}
}
else
{
if (!cookie.atomValue().Equals(""))
{
cookieError(self, cookie);
}
}
cookieOk = true;
}
if (traceLevel >= OtpTrace.Type.sendThreshold)
{
OtpTrace.TraceEvent("<- " + headerType(head) + " " + head.ToString());
/*show received payload too */
long mark = ibuf.Position;
traceobj = ibuf.read_any();
if (traceobj != null)
OtpTrace.TraceEvent(" " + traceobj.ToString());
else
OtpTrace.TraceEvent(" (null)");
ibuf.Seek(mark, System.IO.SeekOrigin.Begin);
}
from = (Erlang.Pid) (head.elementAt(1));
toName = (Erlang.Atom) (head.elementAt(3));
deliver(new OtpMsg(from, toName.atomValue(), ibuf));
break;
case OtpMsg.Tag.exitTag:
case OtpMsg.Tag.exit2Tag:
// { EXIT2, FromPid, ToPid, Reason }
if (!(head.elementAt(3) is Erlang.Atom))
{
goto receive_loop_brk;
}
if (traceLevel >= OtpTrace.Type.ctrlThreshold)
{
OtpTrace.TraceEvent("<- " + headerType(head) + " " + head.ToString());
}
from = (Erlang.Pid) (head.elementAt(1));
to = (Erlang.Pid) (head.elementAt(2));
reason = (Erlang.Atom) head.elementAt(3);
deliver(new OtpMsg(tag, from, to, reason));
break;
case OtpMsg.Tag.exitTTTag:
case OtpMsg.Tag.exit2TTTag:
// { EXIT2, FromPid, ToPid, TraceToken, Reason }
// as above, but bifferent element number
if (!(head.elementAt(4) is Erlang.Atom))
{
goto receive_loop_brk;
}
if (traceLevel >= OtpTrace.Type.ctrlThreshold)
{
OtpTrace.TraceEvent("<- " + headerType(head) + " " + head.ToString());
}
from = (Erlang.Pid) (head.elementAt(1));
to = (Erlang.Pid) (head.elementAt(2));
reason = (Erlang.Atom) head.elementAt(4);
deliver(new OtpMsg(tag, from, to, reason));
break;
case OtpMsg.Tag.linkTag:
case OtpMsg.Tag.unlinkTag:
// { UNLINK, FromPid, ToPid}
if (traceLevel >= OtpTrace.Type.ctrlThreshold)
{
OtpTrace.TraceEvent("<- " + headerType(head) + " " + head.ToString());
}
from = (Erlang.Pid) (head.elementAt(1));
to = (Erlang.Pid) (head.elementAt(2));
deliver(new OtpMsg(tag, from, to));
break;
// absolutely no idea what to do with these, so we ignore them...
case OtpMsg.Tag.groupLeaderTag:
case OtpMsg.Tag.nodeLinkTag:
// { NODELINK }
// (just show trace)
if (traceLevel >= OtpTrace.Type.ctrlThreshold)
{
OtpTrace.TraceEvent("<- " + headerType(head) + " " + head.ToString());
}
break;
case OtpMsg.Tag.monitorPTag:
// {MONITOR_P, FromPid, ToProc, Ref}
case OtpMsg.Tag.demonitorPTag:
// {DEMONITOR_P, FromPid, ToProc, Ref}
if (traceLevel >= OtpTrace.Type.ctrlThreshold)
{
OtpTrace.TraceEvent("<- " + headerType(head) + " " + head.ToString());
}
from = (Erlang.Pid)(head.elementAt(1));
to = (Erlang.Pid)(head.elementAt(2));
eref = (Erlang.Ref)(head.elementAt(3));
deliver(new OtpMsg(tag, from, to, eref));
break;
case OtpMsg.Tag.monitorPexitTag:
// {MONITOR_P_EXIT, FromPid, ToProc, Ref, Reason}
if (traceLevel >= OtpTrace.Type.ctrlThreshold)
{
OtpTrace.TraceEvent("<- " + headerType(head) + " " + head.ToString());
}
from = (Erlang.Pid)(head.elementAt(1));
to = (Erlang.Pid)(head.elementAt(2));
eref = (Erlang.Ref)(head.elementAt(3));
deliver(new OtpMsg(tag, from, to, eref, reason));
break;
default:
// garbage?
if (traceLevel >= OtpTrace.Type.ctrlThreshold)
{
OtpTrace.TraceEvent("<- Unknown tag " + headerType(head) + " " + head.ToString());
}
goto receive_loop_brk;
}
}
receive_loop_brk: ;
// end receive_loop
// this section reachable only with break
// we have received garbage from peer
deliver(new Erlang.Exit("Remote is sending garbage"));
}
catch (OtpAuthException e)
{
deliver(e);
}
catch (Erlang.Exception e)
{
OtpTrace.TraceEvent(e.ToString());
deliver(new Erlang.Exit("Remote is sending garbage: " + e.ToString()));
}
catch (System.Exception e)
{
deliver(new Erlang.Exit("Remote has closed connection: " + e.ToString()));
}
finally
{
close();
OtpTrace.TraceEvent("exit connection "+System.Threading.Thread.CurrentThread.Name);
}
}
private static int r4_lookupPort(AbstractNode node)
{
int port = 0;
System.Net.Sockets.TcpClient s = null;
try
{
OtpOutputStream obuf = new OtpOutputStream();
s = new System.Net.Sockets.TcpClient(node.host(), epmdPort);
// build and send epmd request
// length[2], tag[1], alivename[n] (length = n+1)
obuf.write2BE(node.getAlive().Length + 1);
obuf.write1(port4req);
//UPGRADE_NOTE: This code will be optimized in the future;
byte[] tmpBytes;
int i;
string tmpStr;
tmpStr = node.getAlive();
tmpBytes = new byte[tmpStr.Length];
i = 0;
while (i < tmpStr.Length)
{
tmpBytes[i] = (byte)tmpStr[i];
i++;
}
obuf.writeN(tmpBytes);
// send request
obuf.writeTo((System.IO.Stream)s.GetStream());
if (traceLevel >= traceThreshold)
{
OtpTrace.TraceEvent("-> 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, 100);
if (n < 0)
{
// this was an r3 node => not a failure (yet)
if (s != null)
{
s.Close();
}
throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when looking up " + node.getAlive());
}
OtpInputStream ibuf = new OtpInputStream(tmpbuf);
int response = ibuf.read1();
if (response == port4resp)
{
int result = ibuf.read1();
if (result == 0)
{
port = ibuf.read2BE();
node.ntype = ibuf.read1();
node._proto = ibuf.read1();
node._distHigh = ibuf.read2BE();
node._distLow = ibuf.read2BE();
// ignore rest of fields
}
}
}
catch (System.IO.IOException)
{
if (traceLevel >= traceThreshold)
{
OtpTrace.TraceEvent("<- (no response)");
}
throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when looking up " + node.getAlive());
}
catch (Erlang.Exception)
{
if (traceLevel >= traceThreshold)
{
OtpTrace.TraceEvent("<- (invalid response)");
}
throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when looking up " + node.getAlive());
}
catch (System.Net.Sockets.SocketException)
{
if (traceLevel >= traceThreshold)
{
OtpTrace.TraceEvent("<- (no epmd response)");
}
throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when looking up " + node.getAlive());
}
finally
{
try
{
if (s != null)
{
s.Close();
}
}
catch (System.IO.IOException)
{
/*ignore close errors */
}
s = null;
}
if (traceLevel >= traceThreshold)
{
if (port == 0)
{
OtpTrace.TraceEvent("<- NOT FOUND");
}
else
{
OtpTrace.TraceEvent("<- PORT " + port);
}
}
return(port);
}
protected internal virtual void recvChallengeAck(int our_challenge)
{
byte[] her_digest = new byte[16];
try
{
byte[] buf = read2BytePackage();
OtpInputStream ibuf = new OtpInputStream(buf);
int tag = ibuf.read1();
if (tag != ChallengeAck)
{
throw new System.IO.IOException("Handshake protocol error");
}
ibuf.readN(her_digest);
byte[] our_digest = genDigest(our_challenge, auth_cookie);
if (!digests_equals(her_digest, our_digest))
{
throw new OtpAuthException("Peer authentication error.");
}
}
catch (Erlang.Exception)
{
throw new System.IO.IOException("Handshake failed - not enough data");
}
catch (System.Exception)
{
throw new OtpAuthException("Peer authentication error.");
}
if (traceLevel >= OtpTrace.Type.handshakeThreshold)
{
OtpTrace.TraceEvent("<- " + "HANDSHAKE recvChallengeAck" + " from=" + peer._node + " digest=" + hex(her_digest) + " local=" + self);
}
}
protected internal virtual void recvStatus()
{
try
{
byte[] buf = read2BytePackage();
OtpInputStream ibuf = new OtpInputStream(buf);
int tag = ibuf.read1();
if (tag != ChallengeStatus)
{
throw new System.IO.IOException("Handshake protocol error");
}
byte[] tmpbuf = new byte[buf.Length - 1];
ibuf.readN(tmpbuf);
char[] tmpChar;
tmpChar = new char[tmpbuf.Length];
tmpbuf.CopyTo(tmpChar, 0);
System.String status = new System.String(tmpChar);
if (status.CompareTo("ok") != 0)
{
throw new System.IO.IOException("Peer replied with status '" + status + "' instead of 'ok'");
}
}
catch (Erlang.Exception)
{
throw new System.IO.IOException("Handshake failed - not enough data");
}
catch (System.Net.Sockets.SocketException e)
{
throw new System.IO.IOException("Peer dropped connection: " + e.ToString());
}
if (traceLevel >= OtpTrace.Type.handshakeThreshold)
{
OtpTrace.TraceEvent("<- " + "HANDSHAKE recvStatus (ok)" + " local=" + self);
}
}
protected internal virtual void recvName(OtpPeer peer)
{
System.String hisname = "";
try
{
byte[] tmpbuf = read2BytePackage();
OtpInputStream ibuf = new OtpInputStream(tmpbuf);
byte[] tmpname;
int len = (int) (tmpbuf.Length);
peer.ntype = ibuf.read1();
if (peer.ntype != AbstractNode.NTYPE_R6)
{
throw new System.IO.IOException("Unknown remote node type");
}
peer._distLow = (peer._distHigh = ibuf.read2BE());
if (peer._distLow < 5)
{
throw new System.IO.IOException("Unknown remote node type");
}
peer.flags = ibuf.read4BE();
tmpname = new byte[len - 7];
ibuf.readN(tmpname);
char[] tmpChar;
tmpChar = new char[tmpname.Length];
tmpname.CopyTo(tmpChar, 0);
hisname = new System.String(tmpChar);
// Set the old nodetype parameter to indicate hidden/normal status
// When the old handshake is removed, the ntype should also be.
if ((peer.flags & AbstractNode.dFlagPublished) != 0)
peer.ntype = AbstractNode.NTYPE_R4_ERLANG;
else
peer.ntype = AbstractNode.NTYPE_R4_HIDDEN;
if ((peer.flags & AbstractNode.dFlagExtendedReferences) == 0)
{
throw new System.IO.IOException("Handshake failed - peer cannot handle extended references");
}
if (OtpSystem.useExtendedPidsPorts() && (peer.flags & AbstractNode.dFlagExtendedPidsPorts) == 0)
if (true && (peer.flags & AbstractNode.dFlagExtendedPidsPorts) == 0)
{
throw new System.IO.IOException("Handshake failed - peer cannot handle extended pids and ports");
}
}
catch (Erlang.Exception)
{
throw new System.IO.IOException("Handshake failed - not enough data");
}
int i = hisname.IndexOf((System.Char) '@', 0);
peer._node = hisname;
peer._alive = hisname.Substring(0, (i) - (0));
peer._host = hisname.Substring(i + 1, (hisname.Length) - (i + 1));
if (traceLevel >= OtpTrace.Type.handshakeThreshold)
{
OtpTrace.TraceEvent("<- " + "HANDSHAKE" + " ntype=" + peer.ntype + " dist=" + peer._distHigh + " remote=" + peer);
}
}
protected internal virtual int recvChallenge()
{
int challenge;
try
{
byte[] buf = read2BytePackage();
OtpInputStream ibuf = new OtpInputStream(buf);
peer.ntype = ibuf.read1();
if (peer.ntype != AbstractNode.NTYPE_R6)
{
throw new System.IO.IOException("Unexpected peer type");
}
peer._distLow = (peer._distHigh = ibuf.read2BE());
peer.flags = ibuf.read4BE();
challenge = ibuf.read4BE();
byte[] tmpname = new byte[buf.Length - 11];
ibuf.readN(tmpname);
char[] tmpChar;
tmpChar = new char[tmpname.Length];
tmpname.CopyTo(tmpChar, 0);
System.String hisname = new System.String(tmpChar);
int i = hisname.IndexOf((System.Char) '@', 0);
peer._node = hisname;
peer._alive = hisname.Substring(0, (i) - (0));
peer._host = hisname.Substring(i + 1, (hisname.Length) - (i + 1));
}
catch (Erlang.Exception)
{
throw new System.IO.IOException("Handshake failed - not enough data");
}
if (traceLevel >= OtpTrace.Type.handshakeThreshold)
{
OtpTrace.TraceEvent("<- " + "HANDSHAKE recvChallenge" + " from=" + peer._node + " challenge=" + challenge + " local=" + self);
}
return challenge;
}
/*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 System.Net.Sockets.TcpClient r4_publish(OtpLocalNode node)
{
System.Net.Sockets.TcpClient s = null;
try
{
OtpOutputStream obuf = new OtpOutputStream();
s = new TcpClient(System.Net.Dns.GetHostName(), epmdPort);
obuf.write2BE(node.getAlive().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.getAlive().Length);
//UPGRADE_NOTE: This code will be optimized in the future;
byte[] tmpBytes;
int i;
string tmpStr;
tmpStr = node.getAlive();
tmpBytes = new byte[tmpStr.Length];
i = 0;
while (i < tmpStr.Length)
{
tmpBytes[i] = (byte) tmpStr[i];
i++;
}
obuf.writeN(tmpBytes);
obuf.write2BE(0); // No extra
// send request
obuf.writeTo((System.IO.Stream) s.GetStream());
if (traceLevel >= traceThreshold)
System.Console.Out.WriteLine("-> PUBLISH (r4) " + node + " port=" + node.port());
// get reply
byte[] tmpbuf = new byte[100];
int n = s.GetStream().Read(tmpbuf, 0, 100);
if (n < 0)
{
// this was an r3 node => not a failure (yet)
if (s != null)
s.Close();
throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when publishing " + node.getAlive());
}
OtpInputStream ibuf = new OtpInputStream(tmpbuf);
int response = ibuf.read1();
if (response == publish4resp)
{
int result = ibuf.read1();
if (result == 0)
{
node._creation = ibuf.read2BE();
if (traceLevel >= traceThreshold)
System.Console.Out.WriteLine("<- OK");
return s; // success
}
}
}
catch (System.IO.IOException)
{
// epmd closed the connection = fail
if (s != null)
s.Close();
if (traceLevel >= traceThreshold)
System.Console.Out.WriteLine("<- (no response)");
throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when publishing " + node.getAlive());
}
catch (Erlang.DecodeException)
{
if (s != null)
s.Close();
if (traceLevel >= traceThreshold)
System.Console.Out.WriteLine("<- (invalid response)");
throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when publishing " + node.getAlive());
}
if (s != null)
s.Close();
return null;
}
private static int r4_lookupPort(AbstractNode node)
{
int port = 0;
System.Net.Sockets.TcpClient s = null;
try
{
OtpOutputStream obuf = new OtpOutputStream();
s = new System.Net.Sockets.TcpClient(node.host(), epmdPort);
// build and send epmd request
// length[2], tag[1], alivename[n] (length = n+1)
obuf.write2BE(node.getAlive().Length + 1);
obuf.write1(port4req);
//UPGRADE_NOTE: This code will be optimized in the future;
byte[] tmpBytes;
int i;
string tmpStr;
tmpStr = node.getAlive();
tmpBytes = new byte[tmpStr.Length];
i = 0;
while (i < tmpStr.Length)
{
tmpBytes[i] = (byte) tmpStr[i];
i++;
}
obuf.writeN(tmpBytes);
// send request
obuf.writeTo((System.IO.Stream) s.GetStream());
if (traceLevel >= traceThreshold)
System.Console.Out.WriteLine("-> 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, 100);
if (n < 0)
{
// this was an r3 node => not a failure (yet)
if (s != null)
s.Close();
throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when looking up " + node.getAlive());
}
OtpInputStream ibuf = new OtpInputStream(tmpbuf);
int response = ibuf.read1();
if (response == port4resp)
{
int result = ibuf.read1();
if (result == 0)
{
port = ibuf.read2BE();
node.ntype = ibuf.read1();
node._proto = ibuf.read1();
node._distHigh = ibuf.read2BE();
node._distLow = ibuf.read2BE();
// ignore rest of fields
}
}
}
catch (System.IO.IOException)
{
if (traceLevel >= traceThreshold)
System.Console.Out.WriteLine("<- (no response)");
throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when looking up " + node.getAlive());
}
catch (Erlang.DecodeException)
{
if (traceLevel >= traceThreshold)
System.Console.Out.WriteLine("<- (invalid response)");
throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when looking up " + node.getAlive());
}
finally
{
try
{
if (s != null)
s.Close();
}
catch (System.IO.IOException)
{
/*ignore close errors */
}
s = null;
}
if (traceLevel >= traceThreshold)
{
if (port == 0)
System.Console.Out.WriteLine("<- NOT FOUND");
else
System.Console.Out.WriteLine("<- PORT " + port);
}
return port;
}
protected internal virtual int recvChallengeReply(int our_challenge)
{
int challenge;
byte[] her_digest = new byte[16];
try
{
byte[] buf = read2BytePackage();
OtpInputStream ibuf = new OtpInputStream(buf);
int tag = ibuf.read1();
if (tag != ChallengeReply)
{
throw new System.IO.IOException("Handshake protocol error");
}
challenge = ibuf.read4BE();
ibuf.readN(her_digest);
byte[] our_digest = genDigest(our_challenge, self.cookie());
if (!digests_equals(her_digest, our_digest))
{
throw new OtpAuthException("Peer authentication error.");
}
}
catch (Erlang.DecodeException)
{
throw new System.IO.IOException("Handshake failed - not enough data");
}
if (traceLevel >= handshakeThreshold)
{
System.Console.Out.WriteLine("<- " + "HANDSHAKE recvChallengeReply" + " from=" + peer._node + " challenge=" + challenge + " digest=" + hex(her_digest) + " local=" + self);
}
return challenge;
}
protected internal virtual void recvStatus()
{
try
{
byte[] buf = read2BytePackage();
OtpInputStream ibuf = new OtpInputStream(buf);
int tag = ibuf.read1();
if (tag != ChallengeStatus)
{
throw new System.IO.IOException("Handshake protocol error");
}
byte[] tmpbuf = new byte[buf.Length - 1];
ibuf.readN(tmpbuf);
char[] tmpChar;
tmpChar = new char[tmpbuf.Length];
tmpbuf.CopyTo(tmpChar, 0);
System.String status = new System.String(tmpChar);
if (status.CompareTo("ok") != 0)
{
throw new System.IO.IOException("Peer replied with status '" + status + "' instead of 'ok'");
}
}
catch (Erlang.DecodeException)
{
throw new System.IO.IOException("Handshake failed - not enough data");
}
if (traceLevel >= handshakeThreshold)
{
System.Console.Out.WriteLine("<- " + "HANDSHAKE recvStatus (ok)" + " local=" + self);
}
}
private static System.Net.Sockets.TcpClient r3_publish(OtpLocalNode node)
{
System.Net.Sockets.TcpClient s = null;
try
{
OtpOutputStream obuf = new OtpOutputStream();
s = new System.Net.Sockets.TcpClient(System.Net.Dns.GetHostName(), epmdPort);
obuf.write2BE(node.getAlive().Length + 3);
obuf.write1(publish3req);
obuf.write2BE(node.port());
//UPGRADE_NOTE: This code will be optimized in the future;
byte[] tmpBytes;
int i;
string tmpStr;
tmpStr = node.getAlive();
tmpBytes = new byte[tmpStr.Length];
i = 0;
while (i < tmpStr.Length)
{
tmpBytes[i] = (byte) tmpStr[i];
i++;
}
obuf.writeN(tmpBytes);
// send request
obuf.writeTo((System.IO.Stream) s.GetStream());
if (traceLevel >= traceThreshold)
OtpTrace.TraceEvent("-> PUBLISH (r3) " + node + " port=" + node.port());
byte[] tmpbuf = new byte[100];
int n = s.GetStream().Read(tmpbuf, 0, 100);
if (n < 0)
{
if (s != null)
s.Close();
if (traceLevel >= traceThreshold)
OtpTrace.TraceEvent("<- (no response)");
return null;
}
OtpInputStream ibuf = new OtpInputStream(tmpbuf);
if (ibuf.read1() == publish3ok)
{
node._creation = ibuf.read2BE();
if (traceLevel >= traceThreshold)
OtpTrace.TraceEvent("<- OK");
return s; // success - don't close socket
}
}
catch (System.IO.IOException)
{
// epmd closed the connection = fail
if (s != null)
s.Close();
if (traceLevel >= traceThreshold)
OtpTrace.TraceEvent("<- (no response)");
throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when publishing " + node.getAlive());
}
catch (Erlang.Exception)
{
if (s != null)
s.Close();
if (traceLevel >= traceThreshold)
OtpTrace.TraceEvent("<- (invalid response)");
throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when publishing " + node.getAlive());
}
if (s != null)
s.Close();
return null; // failure
}