| public static newString ( byte bytes ) : String | ||
| bytes | byte | |
| return | String | |
/**
* Read an Erlang atom from the stream.
*
* @return a String containing the value of the atom.
*
* @exception OtpErlangDecodeException
* if the next term in the stream is not an atom.
*/
public String read_atom()
{
int tag;
int len;
byte[] strbuf;
String atom;
tag = read1skip_version();
if (tag != OtpExternal.atomTag)
{
throw new OtpErlangDecodeException("wrong tag encountered, expected " + OtpExternal.atomTag + ", got " + tag);
}
len = read2BE();
strbuf = new byte[len];
this.readN(strbuf);
atom = OtpErlangString.newString(strbuf);
if (atom.Length > OtpExternal.maxAtomLength)
{
atom = atom.Substring(0, OtpExternal.maxAtomLength);
}
return(atom);
}
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;
}
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;
}
/**
* Read a string from the stream.
*
* @return the value of the string.
*
* @exception OtpErlangDecodeException
* if the next term in the stream is not a string.
*/
public String read_string()
{
int tag;
int len;
byte[] strbuf;
tag = read1skip_version();
switch (tag)
{
case OtpExternal.stringTag:
len = read2BE();
strbuf = new byte[len];
this.readN(strbuf);
return(OtpErlangString.newString(strbuf));
case OtpExternal.nilTag:
return("");
case OtpExternal.listTag: // List when unicode +
len = read4BE();
StringBuilder sb = new StringBuilder();
for (int i = 0; i < len; i++)
{
uint cp = (uint)read_int();
if (!OtpErlangString.isValidCodePoint((int)cp))
{
throw new OtpErlangDecodeException("Invalid CodePoint: " + cp);
}
if (1 <= (cp >> 16))
{
cp -= 0x10000;
char high = (char)((cp / 0x400) + 0xD800);
char low = (char)((cp % 0x400) + 0xDC00);
sb.Append(high);
sb.Append(low);
}
else
{
sb.Append((char)cp);
}
}
read_nil();
return(sb.ToString());
default:
throw new OtpErlangDecodeException("Wrong tag encountered, expected " + OtpExternal.stringTag
+ " or " + OtpExternal.listTag + ", got " + tag);
}
}
/**
* Read an Erlang float from the stream.
*
* @return the float value, as a double.
*
* @exception OtpErlangDecodeException
* if the next term in the stream is not a float.
*/
public double read_double()
{
int tag;
// parse the stream
tag = read1skip_version();
switch (tag)
{
case OtpExternal.newFloatTag:
{
return(BitConverter.ToDouble(BitConverter.GetBytes(readBE(8)), 0));
}
case OtpExternal.floatTag:
{
byte[] strbuf = new byte[31];
String str;
double val;
// get the string
this.readN(strbuf);
str = OtpErlangString.newString(strbuf);
if (!Double.TryParse(str, out val))
{
throw new OtpErlangDecodeException("Invalid float format: '" + str + "'");
}
return(val);
}
default:
throw new OtpErlangDecodeException("Wrong tag encountered, expected "
+ OtpExternal.newFloatTag + ", got " + tag);
}
}
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");
}
}
