static XPub()
{
s_markAsMatching = (pipe, data, arg) => {
XPub self = (XPub) arg;
self.m_dist.Match (pipe);
};
s_SendUnsubscription = (pipe, data, arg) => {
XPub self = (XPub) arg;
if (self.m_options.SocketType != ZmqSocketType.Pub)
{
// Place the unsubscription to the queue of pending (un)sunscriptions
// to be retrived by the user later on.
Blob unsub = new Blob (data.Length + 1);
unsub.Put(0,(byte)0);
unsub.Put(1, data);
self.m_pending.AddToBack (unsub);
}
};
}
private bool IdentifyPeer(Pipe pipe)
{
Blob identity;
Msg msg = pipe.Read ();
if (msg == null)
return false;
if (msg.Size == 0) {
// Fall back on the auto-generation
byte[] buf = new byte[5];
buf[0] = 0;
byte[] result = BitConverter.GetBytes(m_nextPeerId++);
//if (BitConverter.IsLittleEndian)
//{
// Array.Reverse(result);
//}
Buffer.BlockCopy(result, 0, buf, 1, 4);
identity = new Blob(buf);
}
else {
identity = new Blob(msg.Data);
// Ignore peers with duplicate ID.
if (m_outpipes.ContainsKey(identity))
return false;
}
pipe.Identity = identity;
// Add the record into output pipes lookup table
Outpipe outpipe = new Outpipe(pipe, true);
m_outpipes.Add (identity, outpipe);
return true;
}
protected override bool XSend(Msg msg, SendRecieveOptions flags)
{
// If this is the first part of the message it's the ID of the
// peer to send the message to.
if (!m_moreOut) {
Debug.Assert(m_currentOut == null);
// If we have malformed message (prefix with no subsequent message)
// then just silently ignore it.
// TODO: The connections should be killed instead.
if (msg.HasMore) {
m_moreOut = true;
// Find the pipe associated with the identity stored in the prefix.
// If there's no such pipe just silently ignore the message, unless
// mandatory is set.
Blob identity = new Blob(msg.Data);
Outpipe op = m_outpipes[identity];
if (op != null) {
m_currentOut = op.Pipe;
if (!m_currentOut.CheckWrite ()) {
op.Active = false;
m_currentOut = null;
}
} else if (m_mandatory) {
m_moreOut = false;
ZError.ErrorNumber = (ErrorNumber.EHOSTUNREACH);
return false;
}
}
return true;
}
// Check whether this is the last part of the message.
m_moreOut = msg.HasMore;
// Push the message into the pipe. If there's no out pipe, just drop it.
if (m_currentOut != null) {
bool ok = m_currentOut.Write (msg);
if (!ok)
m_currentOut = null;
else if (!m_moreOut) {
m_currentOut.Flush ();
m_currentOut = null;
}
}
else {
}
// Detach the message from the data buffer.
return true;
}