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($"-> HANDSHAKE sendChallenge flags={our_flags} challenge={challenge} local={Local}");
}
}
protected int SendName(int dist, long aflags, int creation)
{
OtpOutputStream obuf = new OtpOutputStream();
string str = Local.Node;
int nameTag = (dist == 5 ? 'n' : 'N');
if (dist == 5)
{
obuf.Write2BE(1 + 2 + 4 + str.Length);
obuf.Write1(nameTag);
obuf.Write2BE(dist);
obuf.Write4BE(aflags);
obuf.Write(Encoding.GetEncoding("ISO-8859-1").GetBytes(str));
}
else
{
obuf.Write2BE(1 + 8 + 4 + 2 + str.Length);
obuf.Write1(nameTag);
obuf.Write8BE(aflags);
obuf.Write4BE(creation);
obuf.Write2BE(str.Length);
obuf.Write(Encoding.GetEncoding("ISO-8859-1").GetBytes(str));
}
obuf.WriteTo(socket.OutputStream);
if (TraceLevel >= TraceHandshake)
{
Logger.Debug($"-> HANDSHAKE sendName flags={aflags} dist={dist} local={Local}");
}
return(nameTag);
}
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($"<- PORT (r4) {name}");
}
if (!portmap.TryGetValue(name, out AbstractNode node))
{
node = null;
}
OtpOutputStream obuf = new OtpOutputStream();
if (node != null)
{
obuf.Write1(port4resp);
obuf.Write1(0);
obuf.Write2BE(node.Port);
obuf.Write1(node.Type);
obuf.Write1(node.Proto);
obuf.Write2BE(node.DistHigh);
obuf.Write2BE(node.DistLow);
obuf.Write2BE(len);
obuf.WriteN(alive);
obuf.Write2BE(0);
if (traceLevel >= traceThreshold)
{
Logger.Debug("-> 0 (success)");
}
}
else
{
obuf.Write1(port4resp);
obuf.Write1(1);
if (traceLevel >= traceThreshold)
{
Logger.Debug("-> 1 (failure)");
}
}
await obuf.WriteToAsync(socket.OutputStream);
}
catch (IOException e)
{
if (traceLevel >= traceThreshold)
{
Logger.Debug("<- (no response)");
}
throw new IOException("Request not responding", e);
}
}
protected void SendStatus(string status)
{
OtpOutputStream obuf = new OtpOutputStream();
obuf.Write2BE(status.Length + 1);
obuf.Write1(ChallengeStatus);
obuf.Write(Encoding.GetEncoding("ISO-8859-1").GetBytes(status));
obuf.WriteTo(socket.OutputStream);
if (TraceLevel >= TraceHandshake)
{
Logger.Debug($"-> 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}");
}
}
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}");
}
}
}
