private void Unplug()
{
Debug.Assert(m_plugged);
m_plugged = false;
// Cancel all fd subscriptions.
if (!m_inputError)
{
m_ioObject.RmFd(m_handle);
}
// Disconnect from I/O threads poller object.
m_ioObject.Unplug();
// Disconnect from session object.
if (m_encoder != null)
{
m_encoder.SetMsgSource(null);
}
if (m_decoder != null)
{
m_decoder.SetMsgSink(null);
}
m_session = null;
}
private bool Handshake()
{
Debug.Assert(m_handshaking);
// Receive the greeting.
while (m_greetingBytesRead < GreetingSize)
{
ByteArraySegment greetingSegment = new ByteArraySegment(m_greeting, m_greetingBytesRead);
int n = Read(greetingSegment, GreetingSize - m_greetingBytesRead);
if (n == -1)
{
Error();
return(false);
}
if (n == 0)
{
return(false);
}
m_greetingBytesRead += n;
// We have received at least one byte from the peer.
// If the first byte is not 0xff, we know that the
// peer is using unversioned protocol.
if (m_greeting[0] != 0xff)
{
break;
}
if (m_greetingBytesRead < 10)
{
continue;
}
// Inspect the right-most bit of the 10th byte (which coincides
// with the 'flags' field if a regular message was sent).
// Zero indicates this is a header of identity message
// (i.e. the peer is using the unversioned protocol).
if ((m_greeting[9] & 0x01) == 0)
{
break;
}
// The peer is using versioned protocol.
// Send the rest of the greeting, if necessary.
if (!(((byte[])m_outpos) == ((byte[])m_greetingOutputBuffer) &&
m_outpos.Offset + m_outsize == GreetingSize))
{
if (m_outsize == 0)
{
m_ioObject.SetPollout(m_handle);
}
m_outpos[m_outsize++] = 1; // Protocol version
m_outpos[m_outsize++] = (byte)m_options.SocketType;
}
}
// Is the peer using the unversioned protocol?
// If so, we send and receive rests of identity
// messages.
if (m_greeting[0] != 0xff || (m_greeting[9] & 0x01) == 0)
{
m_encoder = new Encoder(Config.OutBatchSize, m_options.Endian);
m_encoder.SetMsgSource(m_session);
m_decoder = new Decoder(Config.InBatchSize, m_options.Maxmsgsize, m_options.Endian);
m_decoder.SetMsgSink(m_session);
// We have already sent the message header.
// Since there is no way to tell the encoder to
// skip the message header, we simply throw that
// header data away.
int headerSize = m_options.IdentitySize + 1 >= 255 ? 10 : 2;
byte[] tmp = new byte[10];
ByteArraySegment bufferp = new ByteArraySegment(tmp);
int bufferSize = headerSize;
m_encoder.GetData(ref bufferp, ref bufferSize);
Debug.Assert(bufferSize == headerSize);
// Make sure the decoder sees the data we have already received.
m_inpos = new ByteArraySegment(m_greeting);
m_insize = m_greetingBytesRead;
// To allow for interoperability with peers that do not forward
// their subscriptions, we inject a phony subsription
// message into the incomming message stream. To put this
// message right after the identity message, we temporarily
// divert the message stream from session to ourselves.
if (m_options.SocketType == ZmqSocketType.Pub || m_options.SocketType == ZmqSocketType.Xpub)
{
m_decoder.SetMsgSink(this);
}
}
else if (m_greeting[VersionPos] == 0)
{
// ZMTP/1.0 framing.
m_encoder = new Encoder(Config.OutBatchSize, m_options.Endian);
m_encoder.SetMsgSource(m_session);
m_decoder = new Decoder(Config.InBatchSize, m_options.Maxmsgsize, m_options.Endian);
m_decoder.SetMsgSink(m_session);
}
else
{
// v1 framing protocol.
m_encoder = new V1Encoder(Config.OutBatchSize, m_session, m_options.Endian);
m_decoder = new V1Decoder(Config.InBatchSize, m_options.Maxmsgsize, m_session, m_options.Endian);
}
// Start polling for output if necessary.
if (m_outsize == 0)
{
m_ioObject.SetPollout(m_handle);
}
// Handshaking was successful.
// Switch into the normal message flow.
m_handshaking = false;
return(true);
}
private bool Handshake()
{
Debug.Assert(m_handshaking);
// Receive the greeting.
while (m_greetingBytesRead < GreetingSize)
{
ByteArraySegment greetingSegment = new ByteArraySegment(m_greeting, m_greetingBytesRead);
int n = Read(greetingSegment, GreetingSize - m_greetingBytesRead);
if (n == -1)
{
Error();
return false;
}
if (n == 0)
return false;
m_greetingBytesRead += n;
// We have received at least one byte from the peer.
// If the first byte is not 0xff, we know that the
// peer is using unversioned protocol.
if (m_greeting[0] != 0xff)
break;
if (m_greetingBytesRead < 10)
continue;
// Inspect the right-most bit of the 10th byte (which coincides
// with the 'flags' field if a regular message was sent).
// Zero indicates this is a header of identity message
// (i.e. the peer is using the unversioned protocol).
if ((m_greeting[9] & 0x01) == 0)
break;
// The peer is using versioned protocol.
// Send the rest of the greeting, if necessary.
if (!(((byte[]) m_outpos) == ((byte[]) m_greetingOutputBuffer) &&
m_outpos.Offset + m_outsize == GreetingSize))
{
if (m_outsize == 0)
m_ioObject.SetPollout(m_handle);
m_outpos[m_outsize++] = 1; // Protocol version
m_outpos[m_outsize++] = (byte) m_options.SocketType;
}
}
// Is the peer using the unversioned protocol?
// If so, we send and receive rests of identity
// messages.
if (m_greeting[0] != 0xff || (m_greeting[9] & 0x01) == 0)
{
m_encoder = new Encoder(Config.OutBatchSize);
m_encoder.SetMsgSource(m_session);
m_decoder = new Decoder(Config.InBatchSize, m_options.Maxmsgsize);
m_decoder.SetMsgSink(m_session);
// We have already sent the message header.
// Since there is no way to tell the encoder to
// skip the message header, we simply throw that
// header data away.
int headerSize = m_options.IdentitySize + 1 >= 255 ? 10 : 2;
byte[] tmp = new byte[10];
ByteArraySegment bufferp = new ByteArraySegment(tmp);
int bufferSize = headerSize;
m_encoder.GetData(ref bufferp, ref bufferSize);
Debug.Assert(bufferSize == headerSize);
// Make sure the decoder sees the data we have already received.
m_inpos = new ByteArraySegment(m_greeting);
m_insize = m_greetingBytesRead;
// To allow for interoperability with peers that do not forward
// their subscriptions, we inject a phony subsription
// message into the incomming message stream. To put this
// message right after the identity message, we temporarily
// divert the message stream from session to ourselves.
if (m_options.SocketType == ZmqSocketType.Pub || m_options.SocketType == ZmqSocketType.Xpub)
m_decoder.SetMsgSink(this);
}
else if (m_greeting[VersionPos] == 0)
{
// ZMTP/1.0 framing.
m_encoder = new Encoder(Config.OutBatchSize);
m_encoder.SetMsgSource(m_session);
m_decoder = new Decoder(Config.InBatchSize, m_options.Maxmsgsize);
m_decoder.SetMsgSink(m_session);
}
else
{
// v1 framing protocol.
m_encoder = new V1Encoder(Config.OutBatchSize, m_session);
m_decoder = new V1Decoder(Config.InBatchSize, m_options.Maxmsgsize, m_session);
}
// Start polling for output if necessary.
if (m_outsize == 0)
m_ioObject.SetPollout(m_handle);
// Handshaking was successful.
// Switch into the normal message flow.
m_handshaking = false;
return true;
}
