public OtpErlangExternalFun(OtpInputStream buf)
{
OtpErlangExternalFun f = buf.read_external_fun();
module = f.module;
function = f.function;
arity = f.arity;
}
/**
* Create an Erlang ref from a stream containing a ref encoded in Erlang
* external format.
*
* @param buf
* the stream containing the encoded ref.
*
* @exception OtpErlangDecodeException
* if the buffer does not contain a valid external
* representation of an Erlang ref.
*/
public OtpErlangRef(OtpInputStream buf)
{
OtpErlangRef r = buf.read_ref();
node = r.Node;
creation = r.Creation;
ids = r.Ids;
}
/**
* Create an Erlang port from a stream containing a port encoded in Erlang
* external format.
*
* @param buf
* the stream containing the encoded port.
*
* @exception OtpErlangDecodeException
* if the buffer does not contain a valid external
* representation of an Erlang port.
*/
public OtpErlangPort(OtpInputStream buf)
{
OtpErlangPort p = buf.read_port();
node = p.Node;
id = p.Id;
creation = p.Creation;
}
/**
* Create an Erlang PID from a stream containing a PID encoded in Erlang
* external format.
*
* @param buf
* the stream containing the encoded PID.
*
* @exception OtpErlangDecodeException
* if the buffer does not contain a valid external
* representation of an Erlang PID.
*/
public OtpErlangPid(OtpInputStream buf)
{
OtpErlangPid p = buf.read_pid();
node = p.Node;
id = p.Id;
serial = p.Serial;
creation = p.Creation;
}
public OtpErlangFun(OtpInputStream buf)
{
OtpErlangFun f = buf.read_fun();
pid = f.pid;
module = f.module;
arity = f.arity;
md5 = f.md5;
index = f.index;
old_index = f.old_index;
uniq = f.uniq;
freeVars = f.freeVars;
}
public override void run()
{
if (!connected)
{
deliver(new IOException("Not connected"));
return;
}
byte[] lbuf = new byte[4];
OtpInputStream ibuf;
OtpErlangObject traceobj;
int len;
byte[] tock = { 0, 0, 0, 0 };
try
{
receive_loop:
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);
readSock(socket, lbuf);
ibuf = new OtpInputStream(lbuf, flags);
len = ibuf.read4BE();
// received tick? send tock!
if (len == 0)
{
lock (this)
{
socket.GetOutputStream().Write(tock, 0, tock.Length);
socket.GetOutputStream().Flush();
}
}
} while (len == 0); // tick_loop
// got a real message (maybe) - read len bytes
byte[] tmpbuf = new byte[len];
// i = socket.getInputStream().read(tmpbuf);
readSock(socket, tmpbuf);
ibuf = new OtpInputStream(tmpbuf, flags);
if (ibuf.read1() != passThrough)
{
goto receive_loop;
}
// got a real message (really)
OtpErlangObject reason = null;
OtpErlangAtom cookie = null;
OtpErlangObject tmp = null;
OtpErlangTuple head = null;
OtpErlangAtom toName;
OtpErlangPid to;
OtpErlangPid from;
int tag;
// decode the header
tmp = ibuf.read_any();
if (!(tmp is OtpErlangTuple))
{
goto receive_loop;
}
head = (OtpErlangTuple)tmp;
if (!(head.elementAt(0) is OtpErlangLong))
{
goto receive_loop;
}
// lets see what kind of message this is
tag = (int)((OtpErlangLong)head.elementAt(0)).longValue();
switch (tag)
{
case sendTag: // { SEND, Cookie, ToPid }
case 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 OtpErlangAtom))
{
goto receive_loop;
}
cookie = (OtpErlangAtom)head.elementAt(1);
if (sendCookie)
{
if (!cookie.atomValue().Equals(self.Cookie))
{
cookieError(self, cookie);
}
}
else
{
if (!cookie.atomValue().Equals(""))
{
cookieError(self, cookie);
}
}
cookieOk = true;
}
if (traceLevel >= sendThreshold)
{
log.Debug("<- " + headerType(head) + " " + head);
/* show received payload too */
ibuf.Mark(0);
traceobj = ibuf.read_any();
if (traceobj != null)
{
log.Debug(" " + traceobj);
}
else
{
log.Debug(" (null)");
}
ibuf.Reset();
}
to = (OtpErlangPid)head.elementAt(2);
deliver(new OtpMsg(to, ibuf));
break;
case regSendTag: // { REG_SEND, FromPid, Cookie, ToName }
case 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 OtpErlangAtom))
{
goto receive_loop;
}
cookie = (OtpErlangAtom)head.elementAt(2);
if (sendCookie)
{
if (!cookie.atomValue().Equals(self.Cookie))
{
cookieError(self, cookie);
}
}
else
{
if (!cookie.atomValue().Equals(""))
{
cookieError(self, cookie);
}
}
cookieOk = true;
}
if (traceLevel >= sendThreshold)
{
log.Debug("<- " + headerType(head) + " " + head);
/* show received payload too */
ibuf.Mark(0);
traceobj = ibuf.read_any();
if (traceobj != null)
{
log.Debug(" " + traceobj);
}
else
{
log.Debug(" (null)");
}
ibuf.Reset();
}
from = (OtpErlangPid)head.elementAt(1);
toName = (OtpErlangAtom)head.elementAt(3);
deliver(new OtpMsg(from, toName.atomValue(), ibuf));
break;
case exitTag: // { EXIT, FromPid, ToPid, Reason }
case exit2Tag: // { EXIT2, FromPid, ToPid, Reason }
if (head.elementAt(3) == null)
{
goto receive_loop;
}
if (traceLevel >= ctrlThreshold)
{
log.Debug("<- " + headerType(head) + " " + head);
}
from = (OtpErlangPid)head.elementAt(1);
to = (OtpErlangPid)head.elementAt(2);
reason = head.elementAt(3);
deliver(new OtpMsg(tag, from, to, reason));
break;
case exitTTTag: // { EXIT, FromPid, ToPid, TraceToken, Reason }
case exit2TTTag: // { EXIT2, FromPid, ToPid, TraceToken,
// Reason
// }
// as above, but bifferent element number
if (head.elementAt(4) == null)
{
goto receive_loop;
}
if (traceLevel >= ctrlThreshold)
{
log.Debug("<- " + headerType(head) + " " + head);
}
from = (OtpErlangPid)head.elementAt(1);
to = (OtpErlangPid)head.elementAt(2);
reason = head.elementAt(4);
deliver(new OtpMsg(tag, from, to, reason));
break;
case linkTag: // { LINK, FromPid, ToPid}
case unlinkTag: // { UNLINK, FromPid, ToPid}
if (traceLevel >= ctrlThreshold)
{
log.Debug("<- " + headerType(head) + " " + head);
}
from = (OtpErlangPid)head.elementAt(1);
to = (OtpErlangPid)head.elementAt(2);
deliver(new OtpMsg(tag, from, to));
break;
// absolutely no idea what to do with these, so we ignore
// them...
case groupLeaderTag: // { GROUPLEADER, FromPid, ToPid}
case nodeLinkTag: // { NODELINK }
// (just show trace)
if (traceLevel >= ctrlThreshold)
{
log.Debug("<- " + headerType(head) + " " + head);
}
break;
default:
// garbage?
goto receive_loop;
}
} // end receive_loop
// this section reachable only with break
// we have received garbage from peer
deliver(new OtpErlangExit("Remote is sending garbage"));
} // try
catch (OtpAuthException e)
{
deliver(e);
}
catch (OtpErlangDecodeException)
{
deliver(new OtpErlangExit("Remote is sending garbage"));
}
catch (IOException)
{
deliver(new OtpErlangExit("Remote has closed connection"));
}
finally
{
close();
}
}
protected void recvStatus()
{
try
{
byte[] buf = read2BytePackage();
OtpInputStream ibuf = new OtpInputStream(buf, 0);
int tag = ibuf.read1();
if (tag != ChallengeStatus)
{
throw new IOException("Handshake protocol error");
}
byte[] tmpbuf = new byte[buf.Length - 1];
ibuf.readN(tmpbuf);
String status = OtpErlangString.newString(tmpbuf);
if (status.CompareTo("ok") != 0)
{
throw new IOException("Peer replied with status '" + status + "' instead of 'ok'");
}
}
catch (OtpErlangDecodeException)
{
throw new IOException("Handshake failed - not enough data");
}
if (traceLevel >= handshakeThreshold)
{
log.Debug("<- " + "HANDSHAKE recvStatus (ok)" + " local=" + self);
}
}
protected void recvName(OtpPeer peer)
{
String hisname = "";
try
{
byte[] tmpbuf = read2BytePackage();
OtpInputStream ibuf = new OtpInputStream(tmpbuf, 0);
byte[] tmpname;
int len = tmpbuf.Length;
peer.Type = ibuf.read1();
if (peer.Type != AbstractNode.NTYPE_R6)
{
throw new IOException("Unknown remote node type");
}
peer.DistLow = peer.DistHigh = ibuf.read2BE();
if (peer.DistLow < 5)
{
throw new IOException("Unknown remote node type");
}
peer.Flags = ibuf.read4BE();
tmpname = new byte[len - 7];
ibuf.readN(tmpname);
hisname = OtpErlangString.newString(tmpname);
// 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.Type = AbstractNode.NTYPE_R4_ERLANG;
}
else
{
peer.Type = AbstractNode.NTYPE_R4_HIDDEN;
}
if ((peer.Flags & AbstractNode.dFlagExtendedReferences) == 0)
{
throw new IOException("Handshake failed - peer cannot handle extended references");
}
if ((peer.Flags & AbstractNode.dFlagExtendedPidsPorts) == 0)
{
throw new IOException("Handshake failed - peer cannot handle extended pids and ports");
}
}
catch (OtpErlangDecodeException)
{
throw new IOException("Handshake failed - not enough data");
}
int i = hisname.IndexOf('@', 0);
peer.Node = hisname;
peer.Alive = hisname.Substring(0, i);
peer.Host = hisname.Substring(i + 1, hisname.Length - (i + 1));
if (traceLevel >= handshakeThreshold)
{
log.Debug("<- " + "HANDSHAKE" + " ntype=" + peer.Type
+ " dist=" + peer.DistHigh + " remote=" + peer);
}
}
/**
* Create an Erlang integer from a stream containing an integer encoded in
* Erlang external format.
*
* @param buf
* the stream containing the encoded value.
*
* @exception OtpErlangDecodeException
* if the buffer does not contain a valid external
* representation of an Erlang integer.
*
* @exception OtpErlangRangeException
* if the value is too large to be represented as an int,
* or the value is negative.
*/
public OtpErlangUInt(OtpInputStream buf)
: base(buf)
{
}
/**
* Create an Erlang integer from a stream containing an integer encoded in
* Erlang external format.
*
* @param buf
* the stream containing the encoded value.
*
* @exception OtpErlangDecodeException
* if the buffer does not contain a valid external
* representation of an Erlang integer.
*
* @exception OtpErlangRangeException
* if the value is too large to be represented as a
* short.
*/
public OtpErlangShort(OtpInputStream buf)
: base(buf)
{
}
/**
* Create an Erlang string from a stream containing a string encoded in
* Erlang external format.
*
* @param buf
* the stream containing the encoded string.
*
* @exception OtpErlangDecodeException
* if the buffer does not contain a valid external
* representation of an Erlang string.
*/
public OtpErlangString(OtpInputStream buf)
{
str = buf.read_string();
}
protected void recvChallengeAck(int our_challenge)
{
byte[] her_digest = new byte[16];
try
{
byte[] buf = read2BytePackage();
OtpInputStream ibuf = new OtpInputStream(buf, 0);
int tag = ibuf.read1();
if (tag != ChallengeAck)
{
throw new IOException("Handshake protocol error");
}
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 (OtpErlangDecodeException)
{
throw new IOException("Handshake failed - not enough data");
}
catch (Exception)
{
throw new OtpAuthException("Peer authentication error.");
}
if (traceLevel >= handshakeThreshold)
{
log.Debug("<- " + "HANDSHAKE recvChallengeAck" + " from="
+ peer.Node + " digest=" + hex(her_digest) + " local=" + self);
}
}
/**
* Create a binary from a stream containing a binary encoded in Erlang
* external format.
*
* @param buf
* the stream containing the encoded binary.
*
* @exception OtpErlangDecodeException
* if the buffer does not contain a valid external
* representation of an Erlang binary.
*/
public OtpErlangBinary(OtpInputStream buf)
: base(new byte[0])
{
bin = buf.read_binary();
pad_bits = 0;
}
/**
* Create an Erlang integer from a stream containing an integer encoded in
* Erlang external format.
*
* @param buf
* the stream containing the encoded value.
*
* @exception OtpErlangDecodeException
* if the buffer does not contain a valid external
* representation of an Erlang integer.
*
* @exception OtpErlangRangeException
* if the value is too large to be represented as a byte.
*/
public OtpErlangByte(OtpInputStream buf)
: base(buf)
{
}
/*
* 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;
}
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;
}
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
}
private static int r3_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(port3req);
obuf.writeN(Encoding.GetEncoding("iso-8859-1").GetBytes(node.Alive));
// send request
obuf.WriteTo(s.GetStream());
if (traceLevel >= traceThreshold)
{
log.Debug("-> LOOKUP (r3) " + node);
}
// receive and decode reply
byte[] tmpbuf = new byte[100];
s.GetStream().Read(tmpbuf, 0, tmpbuf.Length);
OtpInputStream ibuf = new OtpInputStream(tmpbuf, 0);
port = ibuf.read2BE();
}
}
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;
}
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");
}
}
protected byte[] read2BytePackage()
{
byte[] lbuf = new byte[2];
byte[] tmpbuf;
readSock(socket, lbuf);
OtpInputStream ibuf = new OtpInputStream(lbuf, 0);
int len = ibuf.read2BE();
tmpbuf = new byte[len];
readSock(socket, tmpbuf);
return tmpbuf;
}
protected int recvChallenge()
{
int challenge;
try
{
byte[] buf = read2BytePackage();
OtpInputStream ibuf = new OtpInputStream(buf, 0);
peer.Type = ibuf.read1();
if (peer.Type != AbstractNode.NTYPE_R6)
{
throw new 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);
String hisname = OtpErlangString.newString(tmpname);
if (!hisname.Equals(peer.Node))
{
throw new IOException("Handshake failed - peer has wrong name: " + hisname);
}
if ((peer.Flags & AbstractNode.dFlagExtendedReferences) == 0)
{
throw new IOException("Handshake failed - peer cannot handle extended references");
}
if ((peer.Flags & AbstractNode.dFlagExtendedPidsPorts) == 0)
{
throw new IOException("Handshake failed - peer cannot handle extended pids and ports");
}
}
catch (OtpErlangDecodeException)
{
throw new IOException("Handshake failed - not enough data");
}
if (traceLevel >= handshakeThreshold)
{
log.Debug("<- " + "HANDSHAKE recvChallenge" + " from="
+ peer.Node + " challenge=" + challenge + " local=" + self);
}
return challenge;
}
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;
}
/**
* Read a compressed term from the stream
*
* @return the resulting uncompressed term.
*
* @exception OtpErlangDecodeException
* if the next term in the stream is not a compressed term.
*/
public OtpErlangObject read_compressed()
{
int tag = read1skip_version();
if (tag != OtpExternal.compressedTag)
{
throw new OtpErlangDecodeException("Wrong tag encountered, expected "
+ OtpExternal.compressedTag + ", got " + tag);
}
int size = read4BE();
byte[] buf = new byte[size];
DeflateStream dos = new DeflateStream(this, CompressionMode.Decompress, true);
try
{
int dsize = dos.Read(buf, 0, size);
if (dsize != size)
{
throw new OtpErlangDecodeException("Decompression gave " + dsize + " bytes, not " + size);
}
}
catch (OtpErlangDecodeException)
{
throw;
}
catch (InvalidDataException e)
{
throw new OtpErlangDecodeException(e.Message);
}
OtpInputStream ois = new OtpInputStream(buf, flags);
return ois.read_any();
}
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;
}
/**
* Create a bitstr from a stream containing a bitstr encoded in Erlang
* external format.
*
* @param buf
* the stream containing the encoded bitstr.
*
* @exception OtpErlangDecodeException
* if the buffer does not contain a valid external
* representation of an Erlang bitstr.
*/
public OtpErlangBitstr(OtpInputStream buf)
{
bin = buf.read_bitstr(out pad_bits);
check_bitstr(bin, pad_bits);
}
/**
* Create an Erlang integer from a stream containing an integer encoded in
* Erlang external format.
*
* @param buf
* the stream containing the encoded value.
*
* @exception OtpErlangDecodeException
* if the buffer does not contain a valid external
* representation of an Erlang integer.
*/
public OtpErlangLong(OtpInputStream buf)
{
byte[] b = buf.read_integer_byte_array();
try
{
val = OtpInputStream.byte_array_to_long(b, false);
}
catch (OtpErlangDecodeException)
{
bigVal = new BigInteger(b);
}
}
/**
* Create a tuple from a stream containing an tuple encoded in Erlang
* external format.
*
* @param buf
* the stream containing the encoded tuple.
*
* @exception OtpErlangDecodeException
* if the buffer does not contain a valid external
* representation of an Erlang tuple.
*/
public OtpErlangTuple(OtpInputStream buf)
{
int arity = buf.read_tuple_head();
if (arity > 0)
{
elems = new OtpErlangObject[arity];
for (int i = 0; i < arity; i++)
{
elems[i] = buf.read_any();
}
}
else
{
elems = NO_ELEMENTS;
}
}
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;
}
/**
* Create an atom from a stream containing an atom encoded in Erlang
* external format.
*
* @param buf
* the stream containing the encoded atom.
*
* @exception OtpErlangDecodeException
* if the buffer does not contain a valid external
* representation of an Erlang atom.
*/
public OtpErlangAtom(OtpInputStream buf)
{
atom = buf.read_atom();
}
/**
* Create a boolean from a stream containing an atom encoded in Erlang
* external format. The value of the boolean will be true if the atom
* represented by the stream is "true" without regard to case. For other
* atom values, the boolean will have the value false.
*
* @exception OtpErlangDecodeException
* if the buffer does not contain a valid external
* representation of an Erlang atom.
*/
public OtpErlangBoolean(OtpInputStream buf)
: base(buf)
{
}
