public override bool ProcessPDU(LLCP_Link link, LLCP_PDU recv_pdu)
{
/* Server action */
/* ------------- */
link.RemotePort = recv_pdu.SSAP;
link.LocalPort = (byte)(_server_port & 0x3F);
switch (recv_pdu.PTYPE)
{
case LLCP_PDU.PTYPE_CONNECT:
Trace.WriteLine("> CONNECT");
/* The client wants to connect us */
link.State = LLCP_Link.StateActive;
if (!OnConnect(link, recv_pdu.Payload))
{
/* Failed */
link.Send_DM(LLCP_DM_PDU.REASON_REJECTED); /* 03 */
/* Drop the link */
return(false);
}
else
if (!link.Answered)
{
/* Confirm we agree (CC) */
link.Send_CC();
}
break;
case LLCP_PDU.PTYPE_DISC:
Trace.WriteLine("> DISC");
/* The client is leaving us */
if (link.State == LLCP_Link.StateActive)
{
OnDisconnect(link);
link.Send_DM(LLCP_DM_PDU.REASON_DISC_OK); /* 00 */
}
else
{
link.Send_DM(LLCP_DM_PDU.REASON_NO_CONNECTION); /* 01 */
}
/* Drop the link */
return(false);
case LLCP_PDU.PTYPE_I:
Trace.WriteLine("> I");
/* The client is talking to us */
if (link.State == LLCP_Link.StateActive)
{
byte nr = (byte)(recv_pdu.Sequence & 0x0F);
byte ns = (byte)((recv_pdu.Sequence >> 4) & 0x0F);
link.SetRemoteSequence((byte)((ns + 1) & 0x0F));
OnInformation(link, recv_pdu.Payload);
if (!link.Answered)
{
/* No frame -> ACK */
link.Send_RR();
}
}
else
{
link.Send_DM(LLCP_DM_PDU.REASON_NO_CONNECTION); /* 01 */
}
break;
case LLCP_PDU.PTYPE_RR:
Trace.WriteLine("> RR");
/* The client is acknowledging */
if (link.State == LLCP_Link.StateActive)
{
byte nr = (byte)(recv_pdu.Sequence & 0x0F);
OnAcknowledge(link);
}
else
{
link.Send_DM(LLCP_DM_PDU.REASON_NO_CONNECTION); /* 01 */
}
break;
default:
Trace.WriteLine("Unsupported LLCP frame client->server");
link.Send_FRMR(0x80, recv_pdu.PTYPE, 0x00);
/* Drop the link */
return(false);
}
/* Keep the link OK */
return(true);
}
public override bool ProcessPDU(LLCP_Link link, LLCP_PDU recv_pdu)
{
switch (recv_pdu.PTYPE)
{
case LLCP_PDU.PTYPE_CC:
Trace.WriteLine("> CC");
if (link.State == LLCP_Link.StateOpening)
{
/* Connection accepted */
link.State = LLCP_Link.StateActive;
OnConnect(link, recv_pdu.Payload);
}
break;
case LLCP_PDU.PTYPE_DM:
Trace.WriteLine("> DM");
/* Disconnect OK */
if (link.State == LLCP_Link.StateActive)
{
/* Peer is disconnecting */
link.State = LLCP_Link.StateClosed;
OnDisconnect(link);
}
else
{
/* We were disconnecting - no need to invoke the callback */
link.State = LLCP_Link.StateClosed;
}
/* Drop the link */
return(false);
case LLCP_PDU.PTYPE_I:
Trace.WriteLine("> I");
/* The server is talking to us */
if (link.State == LLCP_Link.StateActive)
{
byte nr = (byte)(recv_pdu.Sequence & 0x0F);
byte ns = (byte)((recv_pdu.Sequence >> 4) & 0x0F);
OnInformation(link, recv_pdu.Payload);
}
break;
case LLCP_PDU.PTYPE_RR:
Trace.WriteLine("> RR");
/* Acknowledge */
if (link.State == LLCP_Link.StateActive)
{
byte nr = (byte)(recv_pdu.Sequence & 0x0F);
OnAcknowledge(link);
}
break;
case LLCP_PDU.PTYPE_RNR:
Trace.WriteLine("> RNR");
break;
default:
Trace.WriteLine("Unsupported LLCP frame server->client");
link.Send_FRMR(0x80, recv_pdu.PTYPE, 0x00);
/* Drop the link */
return(false);
}
/* Keep the link ON */
return(true);
}
