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npu_async.c
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/*--------------------------------------------------------------------------
**
** Copyright (c) 2003-2011, Tom Hunter, Paul Koning
**
** Name: npu_async.c
**
** Description:
** Perform emulation of the ASYNC TIP in an NPU consisting of a
** CDC 2550 HCP running CCP.
**
** This program is free software: you can redistribute it and/or modify
** it under the terms of the GNU General Public License version 3 as
** published by the Free Software Foundation.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License version 3 for more details.
**
** You should have received a copy of the GNU General Public License
** version 3 along with this program in file "license-gpl-3.0.txt".
** If not, see <http://www.gnu.org/licenses/gpl-3.0.txt>.
**
**--------------------------------------------------------------------------
*/
#define DEBUG 0
/*
** -------------
** Include Files
** -------------
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#if defined(__FreeBSD__)
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#endif
#if defined(__APPLE__)
#include <execinfo.h>
#endif
#include "const.h"
#include "types.h"
#include "proto.h"
#include "npu.h"
#include "cci.h"
/*
** -----------------
** Private Constants
** -----------------
*/
#define MaxIvtData 100
#define Ms200 200000
/*
** Telnet protocol elements
*/
#define TELNET_IAC 255
#define TELNET_DONT 254
#define TELNET_DO 253
#define TELNET_WONT 252
#define TELNET_WILL 251
#define TELNET_SB 250
#define TELNET_GO_AHEAD 249
#define TELNET_ERASE_LINE 248
#define TELNET_ERASE_CHAR 247
#define TELNET_AYT 246
#define TELNET_ABT_OUTPUT 245
#define TELNET_INTERRUPT 244
#define TELNET_BREAK 243
#define TELNET_DATA_MARK 242
#define TELNET_NO_OP 241
#define TELNET_SE 240
#define TELNET_OPT_BINARY 0
#define TELNET_OPT_ECHO 1
#define TELNET_OPT_SGA 3
#define TELNET_OPT_MSG_SIZE 4
#define TELNET_OPT_STATUS 5
#define TELNET_OPT_LINE_MODE 34
/*
** -----------------------
** Private Macro Functions
** -----------------------
*/
#if DEBUG
#define HexColumn(x) (3 * (x) + 4)
#define AsciiColumn(x) (HexColumn(16) + 2 + (x))
#define LogLineLength (AsciiColumn(16))
#endif
/*
** -----------------------------------------
** Private Typedef and Structure Definitions
** -----------------------------------------
*/
/*
** ---------------------------
** Private Function Prototypes
** ---------------------------
*/
static void npuAsyncDoFeBefore(u8 fe);
static void npuAsyncDoFeAfter(u8 fe);
static Tcb *npuAsyncFindTcb(Pcb *pcbp);
static void npuAsyncProcessUplineTransparent(Tcb *tp);
static void npuAsyncProcessUplineAscii(Tcb *tp);
static void npuAsyncProcessUplineSpecial(Tcb *tp);
static void npuAsyncProcessUplineNormal(Tcb *tp);
#if DEBUG
static void npuAsyncLogBytes(u8 *bytes, int len);
static void npuAsyncLogFlush(void);
static void npuAsyncPrintStackTrace(FILE *fp);
#endif
/*
** ----------------
** Public Variables
** ----------------
*/
#if DEBUG
FILE *npuAsyncLog = NULL;
#endif
/*
** -----------------
** Private Variables
** -----------------
*/
static Tcb *npuTp;
static u8 fcSingleSpace[] = "\r\n";
static u8 fcDoubleSpace[] = "\r\n\n";
static u8 fcTripleSpace[] = "\r\n\n\n";
static u8 fcBol[] = "\r";
static u8 fcTofAnsi[] = "\r\n\033[H";
static u8 fcTof[] = "\f";
static u8 fcClearHomeAnsi[] = "\r\n\033[H\033[J";
static u8 netBEL[] = { ChrBEL };
static u8 netLF[] = { ChrLF };
static u8 netCR[] = { ChrCR };
static u8 netCRLF[] = { ChrCR, ChrLF };
static u8 echoBuffer[1000];
static u8 *echoPtr;
static int echoLen;
static u8 telnetDo[3] = { TELNET_IAC, TELNET_DO, 0 };
static u8 telnetDont[3] = { TELNET_IAC, TELNET_DONT, 0 };
static u8 telnetWill[6] = { TELNET_IAC, TELNET_WILL, 0, TELNET_IAC, TELNET_WILL, 0 };
static u8 telnetWont[3] = { TELNET_IAC, TELNET_WONT, 0 };
static u8 iAmHereMessage[] = "\r\nYes, I am here.\r\n\r\n";
static u8 blockResetConnection[] =
{
0, // DN
0, // SN
0, // CN
BtHTRESET, // BT/BSN/PRIO
};
#if DEBUG
static char npuAsyncLogBuf[LogLineLength + 1];
static int npuAsyncLogBytesCol = 0;
#endif
/*
** Function tables to interface to either CCP or CCI functions
*/
static bool (*svmConnectTerminal[])(Pcb *bp ) =
{
npuSvmConnectTerminal,
cciSvmConnectTerminal
};
static void (*svmSendDiscRequest[])(Tcb *tp ) =
{
npuSvmSendDiscRequest,
cciSvmSendDiscRequest
};
static void (*tipNotifySent[])(Tcb *tp, u8 blockSeqNo) =
{
npuTipNotifySent,
cciTipNotifySent
};
static void (*asyncProcessUplineNormal[])(Tcb *tp ) =
{
npuAsyncProcessUplineNormal,
cciAsyncProcessUplineNormal,
};
/*
**--------------------------------------------------------------------------
**
** Public Functions
**
**--------------------------------------------------------------------------
*/
/*--------------------------------------------------------------------------
** Purpose: Presets async TIP controls in a freshly allocated PCB.
**
** Parameters: Name Description.
** pcbp pointer to PCB
**
** Returns: Nothing.
**
**------------------------------------------------------------------------*/
void npuAsyncPresetPcb(Pcb *pcbp)
{
pcbp->controls.async.state = StTelnetData;
pcbp->controls.async.pendingWills = 0;
pcbp->controls.async.tp = NULL;
#if DEBUG
if (npuAsyncLog == NULL)
{
npuAsyncLog = fopen("asynclog.txt", "wt");
if (npuAsyncLog == NULL)
{
fprintf(stderr, "asynclog.txt - aborting\n");
exit(1);
}
npuAsyncLogFlush(); // initialize log buffer
}
#endif
}
/*--------------------------------------------------------------------------
** Purpose: Process a break indication from the host.
**
** Parameters: Name Description.
** tp pointer to TCB
** len length of data
**
** Returns: Nothing.
**
**------------------------------------------------------------------------*/
void npuAsyncProcessBreakIndication(Tcb *tp)
{
blockResetConnection[BlkOffDN] = npuSvmCouplerNode;
blockResetConnection[BlkOffSN] = npuSvmNpuNode;
blockResetConnection[BlkOffCN] = tp->cn;
npuBipRequestUplineCanned(blockResetConnection, sizeof(blockResetConnection));
#if DEBUG
fprintf(npuAsyncLog, "Port %02x: break indication for %.7s\n", tp->pcbp->claPort, tp->termName);
#endif
}
/*--------------------------------------------------------------------------
** Purpose: Handle Telnet protocol in data received from network.
**
** Parameters: Name Description.
** pcbp PCB pointer
**
** Returns: Nothing.
**
**------------------------------------------------------------------------*/
void npuAsyncProcessTelnetData(Pcb *pcbp)
{
u8 *dp;
u8 *lp;
u8 opt;
u8 *sp;
u8 tnOutBuf[MaxBuffer];
u8 *tnOutLimit;
u8 *tnOutPtr;
Tcb *tp;
tp = npuAsyncFindTcb(pcbp);
sp = pcbp->inputData;
dp = sp;
tnOutPtr = tnOutBuf;
tnOutLimit = tnOutPtr + sizeof(tnOutBuf);
lp = sp + pcbp->inputCount;
#if DEBUG
if (tp != NULL)
{
fprintf(npuAsyncLog, "Port %02x: Telnet data received from %.7s, size %d\n", pcbp->claPort,
tp->termName, pcbp->inputCount);
}
else
{
fprintf(npuAsyncLog, "Port %02x: Telnet data received, size %d\n", pcbp->claPort,
pcbp->inputCount);
}
npuAsyncLogBytes(pcbp->inputData, pcbp->inputCount);
npuAsyncLogFlush();
#endif
while (sp < lp)
{
switch (pcbp->controls.async.state)
{
case StTelnetData:
if (*sp == TELNET_IAC)
{
sp++;
pcbp->controls.async.state = StTelnetProtoElem;
}
else if (*sp == 0x0D)
{
*dp++ = *sp++;
pcbp->controls.async.state = StTelnetCR;
}
else
{
*dp++ = *sp++;
}
break;
case StTelnetProtoElem:
switch (*sp++)
{
case TELNET_IAC:
*dp++ = TELNET_IAC;
break;
case TELNET_DONT:
pcbp->controls.async.state = StTelnetDont;
break;
case TELNET_DO:
pcbp->controls.async.state = StTelnetDo;
break;
case TELNET_WONT:
pcbp->controls.async.state = StTelnetWont;
break;
case TELNET_WILL:
pcbp->controls.async.state = StTelnetWill;
break;
case TELNET_ERASE_LINE:
if (tp != NULL)
{
*dp++ = tp->params.fvCN;
}
pcbp->controls.async.state = StTelnetData;
break;
case TELNET_ERASE_CHAR:
if (tp != NULL)
{
*dp++ = tp->params.fvBS;
}
pcbp->controls.async.state = StTelnetData;
break;
case TELNET_AYT:
if (tnOutPtr + sizeof(iAmHereMessage) <= tnOutLimit)
{
memcpy(tnOutPtr, iAmHereMessage, sizeof(iAmHereMessage));
tnOutPtr += sizeof(iAmHereMessage);
}
pcbp->controls.async.state = StTelnetData;
break;
case TELNET_ABT_OUTPUT:
if (tp != NULL)
{
*dp++ = tp->params.fvUserBreak1;
}
pcbp->controls.async.state = StTelnetData;
break;
case TELNET_INTERRUPT:
if (tp != NULL)
{
*dp++ = tp->params.fvUserBreak2;
}
pcbp->controls.async.state = StTelnetData;
break;
case TELNET_BREAK:
if (tp != NULL)
{
*dp++ = tp->params.fvUserBreak2;
}
pcbp->controls.async.state = StTelnetData;
break;
case TELNET_DATA_MARK:
case TELNET_GO_AHEAD:
case TELNET_SB:
case TELNET_SE:
case TELNET_NO_OP:
default:
pcbp->controls.async.state = StTelnetData;
break;
}
break;
case StTelnetDont:
opt = *sp++;
if ((opt < 8) && ((1 << opt) & pcbp->controls.async.pendingWills))
{
pcbp->controls.async.pendingWills &= ~(1 << opt);
}
else
{
if (tnOutPtr + 3 <= tnOutLimit)
{
telnetWont[2] = opt;
memcpy(tnOutPtr, telnetWont, 3);
tnOutPtr += 3;
}
}
pcbp->controls.async.state = StTelnetData;
break;
case StTelnetDo:
opt = *sp++;
if ((opt < 8) && ((1 << opt) & pcbp->controls.async.pendingWills))
{
pcbp->controls.async.pendingWills &= ~(1 << opt);
}
else if ((opt == TELNET_OPT_BINARY) || (opt == TELNET_OPT_ECHO) || (opt == TELNET_OPT_SGA))
{
if (tnOutPtr + 3 <= tnOutLimit)
{
telnetWill[2] = opt;
memcpy(tnOutPtr, telnetWill, 3);
tnOutPtr += 3;
}
}
else
{
if (tnOutPtr + 3 <= tnOutLimit)
{
telnetWont[2] = opt;
memcpy(tnOutPtr, telnetWont, 3);
tnOutPtr += 3;
}
}
pcbp->controls.async.state = StTelnetData;
break;
case StTelnetWont:
if (tnOutPtr + 3 <= tnOutLimit)
{
telnetDont[2] = *sp++;
memcpy(tnOutPtr, telnetDont, 3);
tnOutPtr += 3;
}
pcbp->controls.async.state = StTelnetData;
break;
case StTelnetWill:
opt = *sp++;
if ((opt == TELNET_OPT_BINARY) || (opt == TELNET_OPT_SGA))
{
if (tnOutPtr + 3 <= tnOutLimit)
{
telnetDo[2] = opt;
memcpy(tnOutPtr, telnetDo, 3);
tnOutPtr += 3;
}
}
else
{
if (tnOutPtr + 3 <= tnOutLimit)
{
telnetDont[2] = opt;
memcpy(tnOutPtr, telnetDont, 3);
tnOutPtr += 3;
}
}
pcbp->controls.async.state = StTelnetData;
break;
case StTelnetCR:
if ((*sp == 0) || (*sp == 0x0A))
{
sp += 1;
}
pcbp->controls.async.state = StTelnetData;
break;
}
}
if (tnOutPtr > tnOutBuf)
{
send(pcbp->connFd, tnOutBuf, tnOutPtr - tnOutBuf, 0);
#if DEBUG
if (tp != NULL)
{
fprintf(npuAsyncLog, "Port %02x: Telnet options sent to %.7s, size %ld\n", pcbp->claPort,
tp->termName, tnOutPtr - tnOutBuf);
}
else
{
fprintf(npuAsyncLog, "Port %02x: Telnet options sent, size %ld\n", pcbp->claPort,
tnOutPtr - tnOutBuf);
}
npuAsyncLogBytes(tnOutBuf, tnOutPtr - tnOutBuf);
npuAsyncLogFlush();
#endif
}
pcbp->inputCount = dp - pcbp->inputData;
if ((pcbp->inputCount > 0) && (tp != NULL))
{
npuAsyncProcessUplineData(pcbp);
}
}
/*--------------------------------------------------------------------------
** Purpose: Queues data to be sent to a PLATO terminal.
**
** Parameters: Name Description.
** tp pointer to TCB
** data data to be queued
** len length of data
**
** Returns: Nothing.
**
**------------------------------------------------------------------------*/
void npuAsyncPtermNetSend(Tcb *tp, u8 *data, int len)
{
u8 *p;
int count;
/*
** Telnet escape processing as required by Pterm
*/
for (p = data; len > 0; len -= 1)
{
switch (*p++)
{
case 0xFF:
/*
** Double FF to escape the Telnet IAC code making it a real FF.
*/
count = p - data;
npuNetQueueOutput(tp, data, count);
npuNetQueueOutput(tp, (u8 *)"\xFF", 1);
#if DEBUG
fprintf(npuAsyncLog, "Port %02x: send Pterm data to %.7s, size %d\n", tp->pcbp->claPort, tp->termName, count + 1);
npuAsyncLogBytes(data, count);
npuAsyncLogBytes((u8 *)"\xFF", 1);
npuAsyncLogFlush();
#endif
data = p;
break;
case 0x0D:
/*
** Append zero to CR otherwise real zeroes will be stripped by Telnet.
*/
count = p - data;
npuNetQueueOutput(tp, data, count);
npuNetQueueOutput(tp, (u8 *)"\x00", 1);
#if DEBUG
fprintf(npuAsyncLog, "Port %02x: send Pterm data to %.7s, size %d\n", tp->pcbp->claPort, tp->termName, count + 1);
npuAsyncLogBytes(data, count);
npuAsyncLogBytes((u8 *)"\x00", 1);
npuAsyncLogFlush();
#endif
data = p;
break;
}
}
if ((count = p - data) > 0)
{
npuNetQueueOutput(tp, data, count);
#if DEBUG
fprintf(npuAsyncLog, "Port %02x: send Pterm data to %.7s, size %d\n", tp->pcbp->claPort, tp->termName, count);
npuAsyncLogBytes(data, count);
npuAsyncLogFlush();
#endif
}
}
/*--------------------------------------------------------------------------
** Purpose: Resets async TIP controls in a PCB.
**
** Parameters: Name Description.
** pcbp pointer to PCB
**
** Returns: Nothing.
**
**------------------------------------------------------------------------*/
void npuAsyncResetPcb(Pcb *pcbp)
{
NpuBuffer *bp;
pcbp->controls.async.state = StTelnetData;
pcbp->controls.async.pendingWills = 0;
if (pcbp->controls.async.tp != NULL)
{
while ((bp = npuBipQueueExtract(&pcbp->controls.async.tp->outputQ)) != NULL)
{
npuBipBufRelease(bp);
}
pcbp->controls.async.tp = NULL;
}
#if DEBUG
fprintf(npuAsyncLog, "Port %02x: reset PCB\n", pcbp->claPort);
#endif
}
/*--------------------------------------------------------------------------
** Purpose: Queues data to be sent to a Telnet terminal.
**
** Parameters: Name Description.
** tp pointer to TCB
** data data to be queued
** len length of data
**
** Returns: Nothing.
**
**------------------------------------------------------------------------*/
void npuAsyncTelnetNetSend(Tcb *tp, u8 *data, int len)
{
static u8 iac[] = { TELNET_IAC };
u8 *p;
int count;
/*
** Telnet escape processing as required by Telnet protocol.
*/
for (p = data; len > 0; len -= 1)
{
if (*p++ == TELNET_IAC)
{
/*
** Double FF to escape the Telnet IAC code making it a real FF.
*/
count = p - data;
npuNetQueueOutput(tp, data, count);
npuNetQueueOutput(tp, iac, 1);
#if DEBUG
fprintf(npuAsyncLog, "Port %02x: send Telnet data to %.7s, size %d\n", tp->pcbp->claPort, tp->termName, count + 1);
npuAsyncLogBytes(data, count);
npuAsyncLogBytes(iac, 1);
npuAsyncLogFlush();
#endif
data = p;
}
}
if ((count = p - data) > 0)
{
npuNetQueueOutput(tp, data, count);
#if DEBUG
fprintf(npuAsyncLog, "Port %02x: send Telnet data to %.7s, size %d\n", tp->pcbp->claPort, tp->termName, count);
npuAsyncLogBytes(data, count);
npuAsyncLogFlush();
#endif
}
}
/*--------------------------------------------------------------------------
** Purpose: Try to send any queued data.
**
** Parameters: Name Description.
** pcbp PCB pointer
**
** Returns: Nothing.
**
**------------------------------------------------------------------------*/
void npuAsyncTryOutput(Pcb *pcbp)
{
NpuBuffer *bp;
u8 *data;
int result;
Tcb *tp;
tp = npuAsyncFindTcb(pcbp);
if (tp == NULL)
{
return;
}
/*
** Handle transparent input timeout.
*/
if (tp->xInputTimerRunning && ((cycles - tp->xStartCycle) >= Ms200))
{
#if DEBUG
fprintf(npuAsyncLog, "Port %02x: transparent input timeout on %.7s\n", pcbp->claPort, tp->termName);
#endif
npuAsyncFlushUplineTransparent(tp);
}
/*
** Suspend output while x-off is in effect
*/
if (tp->xoff == TRUE)
{
return;
}
/*
** Process all queued output buffers.
*/
while ((bp = npuBipQueueExtract(&tp->outputQ)) != NULL)
{
data = bp->data + bp->offset;
/*
** Don't call into TCP if there is no data to send.
*/
if (bp->numBytes > 0)
{
result = send(pcbp->connFd, data, bp->numBytes, 0);
#if DEBUG
if (result > 0)
{
fprintf(npuAsyncLog, "Port %02x: %d bytes sent to %.7s\n", tp->pcbp->claPort, result, tp->termName);
npuAsyncLogBytes(data, result);
npuAsyncLogFlush();
}
#endif
}
else
{
result = 0;
}
if (result >= bp->numBytes)
{
/*
** The socket took all our data - let TIP know what block sequence
** number we processed, free the buffer and then continue.
*/
if (bp->blockSeqNo != 0)
{
tipNotifySent[npuSw](tp, bp->blockSeqNo);
}
npuBipBufRelease(bp);
continue;
}
/*
** Not all has been sent. Put the buffer back into the queue.
*/
npuBipQueuePrepend(bp, &tp->outputQ);
/*
** Was there an error?
*/
if (result < 0)
{
/*
** Likely this is a "would block" type of error - no need to do
** anything here. The select() call will later tell us when we
** can send again. Any disconnects or other errors will be handled
** by the receive handler.
*/
return;
}
/*
** The socket did not take all data - update offset and count.
*/
if (result > 0)
{
bp->offset += result;
bp->numBytes -= result;
}
}
}
/*--------------------------------------------------------------------------
** Purpose: Process downline data from host.
**
** Parameters: Name Description.
** tp pointer to TCB
** bp buffer with downline data message.
** last last buffer.
**
** Returns: Nothing.
**
**------------------------------------------------------------------------*/
void npuAsyncProcessDownlineData(Tcb *tp, NpuBuffer *bp, bool last)
{
u8 *blk = bp->data + BlkOffData;
int len = bp->numBytes - BlkOffData;
u8 dbc;
u8 fe;
int textlen;
u8 *ptrUS;
npuTp = tp;
/*
** Extract Data Block Clarifier settings.
*/
dbc = *blk++;
len -= 1;
npuTp->dbcNoEchoplex = (dbc & DbcEchoplex) != 0;
npuTp->dbcNoCursorPos = (dbc & DbcNoCursorPos) != 0;
#if DEBUG
fprintf(npuAsyncLog, "Port %02x: downline data received for %.7s, size %d, block type %u, dbc %02x\n",
tp->pcbp->claPort, tp->termName, len, bp->data[BlkOffBTBSN] & BlkMaskBT, dbc);
npuAsyncLogBytes(bp->data, bp->numBytes);
npuAsyncLogFlush();
#endif
if ((dbc & DbcTransparent) != 0)
{
npuNetSend(npuTp, blk, len);
npuNetQueueAck(npuTp, (u8)(bp->data[BlkOffBTBSN] & (BlkMaskBSN << BlkShiftBSN)));
return;
}
/*
** Process data.
*/
while (len > 0)
{
if ((dbc & DbcNoFe) != 0)
{
/*
** Format effector is supressed - output is single-spaced.
*/
fe = ' ';
}
else
{
fe = *blk++;
len -= 1;
}
/*
** Process leading format effector.
*/
npuAsyncDoFeBefore(fe);
if (len == 0)
{
/*
** End-of-data.
*/
break;
}
/*
** Locate the US byte which defines the end-of-line.
*/
ptrUS = memchr(blk, ChrUS, len);
if (ptrUS == NULL)
{
/*
** No US byte in the rest of the buffer, so send the entire
** rest to the terminal.
*/
npuNetSend(npuTp, blk, len);
break;
}
/*
** Send the line.
*/
textlen = ptrUS - blk;
npuNetSend(npuTp, blk, textlen);
/*
** Process trailing format effector.
*/
if ((dbc & DbcNoCursorPos) == 0)
{
npuAsyncDoFeAfter(fe);
}
/*
** Advance pointer past the US byte and adjust the length.
*/
blk += textlen + 1;
len -= textlen + 1;
}
npuNetQueueAck(npuTp, (u8)(bp->data[BlkOffBTBSN] & (BlkMaskBSN << BlkShiftBSN)));
}
/*--------------------------------------------------------------------------
** Purpose: Process upline data from terminal.
**
** Parameters: Name Description.
** pcbp PCB pointer
**
** Returns: Nothing.
**
**------------------------------------------------------------------------*/
void npuAsyncProcessUplineData(Pcb *pcbp)
{
Tcb *tp;
tp = npuAsyncFindTcb(pcbp);
if ((tp == NULL) || (tp->state != StTermConnected))
{
return;
}
#if DEBUG
fprintf(npuAsyncLog, "Port %02x: upline data received from %.7s, size %d\n", pcbp->claPort, tp->termName, pcbp->inputCount);
npuAsyncLogBytes(pcbp->inputData, pcbp->inputCount);
npuAsyncLogFlush();
#endif
echoPtr = echoBuffer;
if (tp->params.fvXInput)
{
npuAsyncProcessUplineTransparent(tp);
}
else if (tp->params.fvFullASCII)
{
npuAsyncProcessUplineAscii(tp);
}
else if (tp->params.fvSpecialEdit)
{
npuAsyncProcessUplineSpecial(tp);
}
else
{
asyncProcessUplineNormal[npuSw](tp);
}
/*
** Optionally echo characters.
*/
if (!tp->dbcNoEchoplex)
{
echoLen = echoPtr - echoBuffer;
if (echoLen)
{
npuNetSend(tp, echoBuffer, echoLen);
}
}
}
/*--------------------------------------------------------------------------
** Purpose: Flush transparent upline data from terminal.
**
** Parameters: Name Description.
** tp TCB pointer
**
** Returns: Nothing.
**
**------------------------------------------------------------------------*/
void npuAsyncFlushUplineTransparent(Tcb *tp)
{
if (!tp->params.fvXStickyTimeout)
{
/*
** Terminate transparent mode unless sticky timeout has been selected.
*/
tp->params.fvXInput = FALSE;
#if DEBUG
fprintf(npuAsyncLog, "Port %02x: terminate upline transparent mode on %.7s\n", tp->pcbp->claPort, tp->termName);
#endif
}
#if DEBUG
else
{
fprintf(npuAsyncLog, "Port %02x: continue upline transparent mode on %.7s\n", tp->pcbp->claPort, tp->termName);
}
#endif
/*
** Send the upline data.
*/
tp->inBuf[BlkOffDbc] = DbcTransparent;
npuBipRequestUplineCanned(tp->inBuf, tp->inBufPtr - tp->inBuf);
#if DEBUG
fprintf(npuAsyncLog, "Port %02x: send upline transparent data for %.7s, size %ld\n",
tp->pcbp->claPort, tp->termName, tp->inBufPtr - tp->inBuf);
npuAsyncLogBytes(tp->inBuf, tp->inBufPtr - tp->inBuf);
npuAsyncLogFlush();
fprintf(npuAsyncLog, "Port %02x: cancel transparent input timer for %.7s\n", tp->pcbp->claPort, tp->termName);
#endif
npuTipInputReset(tp);
tp->xInputTimerRunning = FALSE;
}
/*--------------------------------------------------------------------------
** Purpose: Handles a network connect notification from NET.
**