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/***************************************************************************
Name : FCOM.C Comment : Functions for dealing with Windows Comm driver
Revision Log Num Date Name Description --- -------- ---------- -----------------------------------------------***************************************************************************/
#include "prep.h"
#include <comdevi.h>
#include "fcomapi.h"
#include "fcomint.h"
#include "fdebug.h"
#ifdef MDRV // to check for conflicts
#include "..\class1\class1.h"
#endif
#include <filet30.h> // for registry info.
///RSL
#include "t30gl.h"
#include "glbproto.h"
#ifdef ADAPTIVE_ANSWER
# pragma message("Compiling with ADAPTIVE_ANSWER")
#endif
#ifdef DEBUG
void d_TimeStamp(LPSTR lpsz, DWORD dwID);# define TIMESTAMP(str, id)\
d_TimeStamp(str, (DWORD)(id))#else // !DEBUG
# define TIMESTAMP(str, id)
#endif // !DEBUG
// in ms
#define TIME_CONTROL 50
#ifdef DEBUG
# define ST_FC(x) if(ZONE_FC) { x; }
#else
# define ST_FC(x) { }
#endif
#define faxTlog(m) DEBUGMSG(ZONE_FC, m)
#define faxT2log(m) DEBUGMSG(ZONE_FC2, m)
#define faxT3log(m) DEBUGMSG(ZONE_FC3, m)
#define faxT4log(m) DEBUGMSG(ZONE_FC4, m)
/***------------- Local Vars and defines ------------------***/
#define LONG_DEADCOMMTIMEOUT 60000L
#define SHORT_DEADCOMMTIMEOUT 10000L
#define WAIT_FCOM_FILTER_FILLCACHE_TIMEOUT 120000
#define WAIT_FCOM_FILTER_READBUF_TIMEOUT 120000
// don't want DEADCOMMTIMEOUT to be greater than 32767, so make sure
// buf sizes are always 9000 or less. maybe OK.
#ifdef WIN32
// Our COMM timeout settings, used in call to SetCommTimeouts. These
// values (expect read_interval_timeout) are the default values for
// Daytona NT Beta 2, and seem to work fine..
#define READ_INTERVAL_TIMEOUT 100
#define READ_TOTAL_TIMEOUT_MULTIPLIER 0
#define READ_TOTAL_TIMEOUT_CONSTANT 0
#define WRITE_TOTAL_TIMEOUT_MULTIPLIER 0
#define WRITE_TOTAL_TIMEOUT_CONSTANT LONG_DEADCOMMTIMEOUT
#endif
#define CTRL_P 0x10
#define CTRL_Q 0x11
#define CTRL_S 0x13
#define MYGETCOMMERROR_FAILED 117437834L
BOOL FComDTR(PThrdGlbl pTG, BOOL fEnable){ (MyDebugPrint(pTG, LOG_ALL, "FComDTR = %d\r\n", fEnable));
if(MyGetCommState(pTG->Comm.nCid, &(pTG->Comm.dcb))) goto error;
(MyDebugPrint(pTG, LOG_ALL, "FaxDTR Before: %02x\r\n", pTG->Comm.dcb.fDtrControl)); pTG->Comm.dcb.fDtrControl = (fEnable ? DTR_CONTROL_ENABLE : DTR_CONTROL_DISABLE);
if(MySetCommState(pTG->Comm.nCid, &(pTG->Comm.dcb))) goto error;
(MyDebugPrint(pTG, LOG_ALL, "After: %02x\r\n", pTG->Comm.dcb.fDtrControl));
return TRUE;
error: (MyDebugPrint(pTG, LOG_ERR, "<<ERROR>> FaxDTR --- Can't Set/Get DCB\r\n")); FComGetError(pTG); return FALSE;}
BOOL FComClose(PThrdGlbl pTG){ // Note: even if FComClose fails, pTG->Comm.nCid, pTG->Comm.fCommOpen,
// and pTG->Comm.fExternalHandle are all reset.
int nRet; // MUST be 16bit in WIN16 and 32bit in WIN32
BOOL fRet = TRUE;
(MyDebugPrint(pTG, LOG_ALL, "Closing Comm pTG->Comm.nCid=%d\r\n", pTG->Comm.nCid));
//
// handoff
//
if (pTG->Comm.fEnableHandoff && pTG->Comm.fDataCall) { My2ndCloseComm(pTG->Comm.nCid, &nRet); goto lEnd; }
ST_FC(D_FComCheck(pTG, pTG->Comm.nCid));
#if 1
// We flush our internal buffer here...
if (pTG->Comm.lpovrCur) { int nNumWrote; // Must be 32bits in WIN32
if (!ov_write(pTG, pTG->Comm.lpovrCur, &nNumWrote)) { // error...
(MyDebugPrint(pTG, LOG_ERR, "FComClose: 1st ov_write failed at %ld\n", GetTickCount() ));
} BG_CHK (pTG->Comm.lpovrCur->eState==eFREE || pTG->Comm.lpovrCur->eState==eIO_PENDING); pTG->Comm.lpovrCur=NULL; (MyDebugPrint(pTG, LOG_ALL, "FComClose: done writing mybuf.\r\n")); } ov_drain(pTG, FALSE);#endif
#ifdef METAPORT
if (1) // RSL pTG->Comm.fExternalHandle)
{ // Here we will restore settings to what it was when we
// took over the port. Currently (9/23/94) we (a) restore the
// DCB to pTG->Comm.dcbOrig and (b) If DTR was originally ON,
// try to sync the modem to
// the original speed by issueing "AT" -- because unimodem does
// only a half-hearted attempt at synching before giving up.
#ifdef ADAPTIVE_ANSWER
if(pTG->Comm.fStateChanged && (!pTG->Comm.fEnableHandoff || !pTG->Comm.fDataCall))#else // !ADAPTIVE_ANSWER
if(pTG->Comm.fStateChanged)#endif // !ADAPTIVE_ANSWER
{ if (MySetCommState(pTG->Comm.nCid, &(pTG->Comm.dcbOrig))) { (MyDebugPrint(pTG, LOG_ERR, "<<WARNING>> FComClose --- Couldn't restor state. Err=0x%lx\r\n", (unsigned long) GetLastError())); }
(MyDebugPrint(pTG, LOG_ALL, "FComClose restored DCB to Baud=%d, fOutxCtsFlow=%d, fDtrControl=%d, fOutX=%d\n", pTG->Comm.dcbOrig.BaudRate, pTG->Comm.dcbOrig.fOutxCtsFlow, pTG->Comm.dcbOrig.fDtrControl, pTG->Comm.dcbOrig.fOutX));
pTG->CurrentSerialSpeed = (UWORD) pTG->Comm.dcbOrig.BaudRate;
if (pTG->Comm.dcbOrig.fDtrControl==DTR_CONTROL_ENABLE) {
// Try to pre-sync modem at new speed before we hand
// it back to TAPI. Can't call iiSyncModemDialog here because
// it's defined at a higher level. We don't really care
// to determine if we get an OK response anyway...
#define AT "AT"
#define cr "\r"
#define iSyncModemDialog2(pTG, s, l, w1, w2) \
iiModemDialog(pTG, s, l, 990, TRUE, 2, TRUE, (CBPSTR)w1, (CBPSTR)w2, (CBPSTR)(NULL))
if (!iSyncModemDialog2(pTG, AT cr,sizeof(AT cr)-1,"OK", "0")) { (MyDebugPrint(pTG, LOG_ERR, "ERROR: couldn't sync AT command at %ld\n"), GetTickCount() ); } else { (MyDebugPrint(pTG, LOG_ERR, "Sync AT command OK at %ld\n"), GetTickCount() );
// We flush our internal buffer here...
if (pTG->Comm.lpovrCur) { int nNumWrote; // Must be 32bits in WIN32
if (!ov_write(pTG, pTG->Comm.lpovrCur, &nNumWrote)) { // error...
(MyDebugPrint(pTG, LOG_ERR, "FComClose: 2nd ov_write failed at %ld\n", GetTickCount() )); } BG_CHK (pTG->Comm.lpovrCur->eState==eFREE || pTG->Comm.lpovrCur->eState==eIO_PENDING); pTG->Comm.lpovrCur=NULL; (MyDebugPrint(pTG, LOG_ALL, "FComClose: done writing mybuf.\r\n")); } ov_drain(pTG, FALSE);
}
} } pTG->Comm.fStateChanged=FALSE;#ifdef ADAPTIVE_ANSWER
pTG->Comm.fDataCall=FALSE;#endif // ADAPTIVE_ANSWER
} // RSL else
#endif // METAPORT
{
(MyDebugPrint(pTG, LOG_ALL, "Closing Comm pTG->Comm.nCid=%d. \n", pTG->Comm.nCid)); // FComDTR(pTG, FALSE); // drop DTR before closing port
My2ndCloseComm(pTG->Comm.nCid, &nRet); if(nRet) { DEBUGSTMT(D_PrintIE(nRet)); FComGetError(pTG); fRet=FALSE; } }
#ifndef MON3 //!MON3
#ifdef MON
PutMonBufs(pTG);#endif
#endif //!MON3
lEnd:
#ifdef WIN32
if (pTG->Comm.ovAux.hEvent) CloseHandle(pTG->Comm.ovAux.hEvent); _fmemset(&pTG->Comm.ovAux, 0, sizeof(pTG->Comm.ovAux)); ov_deinit(pTG);#endif
pTG->Comm.nCid = (-1); pTG->Comm.fCommOpen = FALSE;
#ifdef METAPORT
pTG->Comm.fExternalHandle=FALSE;#endif
#ifdef WIN32
pTG->Comm.fDoOverlapped=FALSE;#endif
return fRet;}
/////////////////////////////////////////////////////////////////////////////////////////////
BOOLT30ComInit ( PThrdGlbl pTG, HANDLE hComm ){
if (pTG->fCommInitialized) { goto lSecondInit; }
pTG->Comm.fDataCall=FALSE;
#ifdef METAPORT
BG_CHK(!pTG->Comm.fCommOpen && !pTG->Comm.fExternalHandle && !pTG->Comm.fStateChanged);#endif
BG_CHK(!pTG->Comm.ovAux.hEvent);
(MyDebugPrint(pTG, LOG_ALL, "Opening Comm Port=%x\r\n", hComm));
pTG->CommCache.dwMaxSize = 4096;
ClearCommCache(pTG); pTG->CommCache.fReuse = 0;
(MyDebugPrint(pTG, LOG_ALL, "OPENCOMM:: bufs in=%d out=%d\r\n", COM_INBUFSIZE, COM_OUTBUFSIZE));
pTG->Comm.nCid = (LONG_PTR) hComm;
if(pTG->Comm.nCid < 0) { (MyDebugPrint(pTG, LOG_ERR, "OPENCOMM failed. nRet=%d\r\n", pTG->Comm.nCid)); //DEBUGSTMT(D_PrintIE(pTG->Comm.nCid));
goto error; }
(MyDebugPrint(pTG, LOG_ALL, "OPENCOMM succeeded nCid=%d\r\n", pTG->Comm.nCid)); pTG->Comm.fCommOpen = TRUE;
pTG->Comm.cbInSize = COM_INBUFSIZE; pTG->Comm.cbOutSize = COM_OUTBUFSIZE;
// Reset Comm timeouts...
{ COMMTIMEOUTS cto; _fmemset(&cto, 0, sizeof(cto));
// Out of curiosity, see what they are set at currently...
if (!GetCommTimeouts((HANDLE) pTG->Comm.nCid, &cto)) { (MyDebugPrint(pTG, LOG_ERR, "<<WARNING>> GetCommTimeouts fails for handle=0x%lx\r\n", (unsigned long) pTG->Comm.nCid)); } else { (MyDebugPrint(pTG, LOG_ALL, "GetCommTimeouts: cto={%lu, %lu, %lu, %lu, %lu}\r\n", (unsigned long) cto.ReadIntervalTimeout, (unsigned long) cto.ReadTotalTimeoutMultiplier, (unsigned long) cto.ReadTotalTimeoutConstant, (unsigned long) cto.WriteTotalTimeoutMultiplier, (unsigned long) cto.WriteTotalTimeoutConstant)); }
cto.ReadIntervalTimeout = READ_INTERVAL_TIMEOUT; cto.ReadTotalTimeoutMultiplier = READ_TOTAL_TIMEOUT_MULTIPLIER; cto.ReadTotalTimeoutConstant = READ_TOTAL_TIMEOUT_CONSTANT; cto.WriteTotalTimeoutMultiplier = WRITE_TOTAL_TIMEOUT_MULTIPLIER; cto.WriteTotalTimeoutConstant = WRITE_TOTAL_TIMEOUT_CONSTANT; if (!SetCommTimeouts((HANDLE) pTG->Comm.nCid, &cto)) { (MyDebugPrint(pTG, LOG_ERR, "<<WARNING>> SetCommTimeouts fails for handle=0x%lx\r\n", (unsigned long) pTG->Comm.nCid)); } }
pTG->Comm.fCommOpen = TRUE;
pTG->Comm.cbInSize = COM_INBUFSIZE; pTG->Comm.cbOutSize = COM_OUTBUFSIZE;
_fmemset(&(pTG->Comm.comstat), 0, sizeof(COMSTAT));
if(MyGetCommState(pTG->Comm.nCid, &(pTG->Comm.dcb))) goto error2;
#ifdef METAPORT
pTG->Comm.dcbOrig = pTG->Comm.dcb; // structure copy.
pTG->Comm.fStateChanged=TRUE;#endif
lSecondInit:
// Use of 2400/ 8N1 and 19200 8N1 is not actually specified
// in Class1, but seems to be adhered to be universal convention
// watch out for modems that break this!
if (pTG->SerialSpeedInit) { pTG->Comm.dcb.BaudRate = pTG->SerialSpeedInit; } else { pTG->Comm.dcb.BaudRate = 19200; // default
}
pTG->CurrentSerialSpeed = (UWORD) pTG->Comm.dcb.BaudRate;
pTG->Comm.dcb.ByteSize = 8; pTG->Comm.dcb.Parity = NOPARITY; pTG->Comm.dcb.StopBits = ONESTOPBIT;
pTG->Comm.dcb.fBinary = 1; pTG->Comm.dcb.fParity = 0;
/************************************
Pins assignments, & Usage
Protective Gnd -- 1 Transmit TxD (DTE to DCE) 3 2 Recv RxD (DCE to DTE) 2 3 RTS (Recv Ready--DTE to DCE) 7 4 CTS (TransReady--DCE to DTE) 8 5 DSR (DCE to DTE) 6 6 signal ground 5 7 CD (DCE to DTR) 1 8 DTR (DTE to DCE) 4 20 RI (DCE to DTE) 9 22
Many 9-pin adaptors & cables use only 6 pins, 2,3,4,5, and 7. We need to worry about this because some modems actively use CTS, ie. pin 8. We don't care about RI and CD (Unless a really weird modem uses CD for flow control). We ignore DSR, but some (not so weird, but not so common either) modems use DSR for flow control.
Thought :: Doesn't generate DSR. Seems to tie CD and CTS together DOVE :: Generates only CTS. But the Appletalk-9pin cable only passes 1-5 and pin 8. GVC :: CTS, DSR and CD ************************************/
// CTS -- dunno. There is some evidence that the
// modem actually uses it for flow control
if (pTG->fEnableHardwareFlowControl) { pTG->Comm.dcb.fOutxCtsFlow = 1; // Using it hangs the output sometimes...
} else { pTG->Comm.dcb.fOutxCtsFlow = 0; } // Try ignoring it and see if it works?
pTG->Comm.dcb.fOutxDsrFlow = 0; // Never use this??
pTG->Comm.dcb.fRtsControl = RTS_CONTROL_ENABLE; // Current code seems to leave this ON
pTG->Comm.dcb.fDtrControl = (pTG->Comm.fExternalHandle) ? pTG->Comm.dcbOrig.fDtrControl : DTR_CONTROL_DISABLE; // If external handle, we preserve the
// previous state, else we
// keep it off until we need it.
pTG->Comm.dcb.fErrorChar = 0; pTG->Comm.dcb.ErrorChar = 0; // Can't change this cause SetCommState() resets hardware.
pTG->Comm.dcb.EvtChar = ETX; // set this when we set an EventWait
pTG->Comm.dcb.fOutX = 0; // Has to be OFF during HDLC recv phase
pTG->Comm.dcb.fInX = 0; // Will this do any good??
// Using flow-control on input is only a good
// idea if the modem has a largish buffer
pTG->Comm.dcb.fNull = 0;
pTG->Comm.dcb.XonChar = CTRL_Q; pTG->Comm.dcb.XoffChar = CTRL_S; pTG->Comm.dcb.XonLim = 100; // Need to set this when BufSize is set
pTG->Comm.dcb.XoffLim = 50; // Set this when BufSize is set
// actually we *never* use XON/XOFF in recv, so don't worry about this
// right now. (Later, when we have smart modems with large buffers, &
// we are worried about our ISR buffer filling up before our windows
// process gets run, we can use this). Some tuning will be reqd.
pTG->Comm.dcb.EofChar = 0;
pTG->Comm.dcb.fAbortOnError = 0; // RSL don't fail if minor problems
if(MySetCommState(pTG->Comm.nCid, &(pTG->Comm.dcb))) goto error2;
if (pTG->fCommInitialized) { return TRUE; }
#ifdef METAPORT
pTG->Comm.fStateChanged=TRUE;#endif
MySetCommMask(pTG->Comm.nCid, 0); // all events off
BG_CHK(!pTG->Comm.lpovrCur); pTG->Comm.lpovrCur=NULL;
_fmemset(&pTG->Comm.ovAux,0, sizeof(pTG->Comm.ovAux)); pTG->Comm.ovAux.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); if (pTG->Comm.ovAux.hEvent==NULL) { (MyDebugPrint(pTG, LOG_ERR, "<<ERROR>> FComOpen: couldn't create event\r\n")); goto error2; } if (!ov_init(pTG)) { CloseHandle(pTG->Comm.ovAux.hEvent); pTG->Comm.ovAux.hEvent=0; goto error2; }
return TRUE;
error: //DEBUGSTMT(D_PrintIE(pTG->Comm.nCid));
error2: (MyDebugPrint(pTG, LOG_ERR, "<<ERROR>> FComOpen failed\r\n")); FComGetError(pTG); if (pTG->Comm.fCommOpen) { FComClose(pTG); BG_CHK(!pTG->Comm.fCommOpen);#ifdef METAPORT
BG_CHK(!pTG->Comm.fExternalHandle && !pTG->Comm.fStateChanged);#endif
} return FALSE;}
BOOL FComSetBaudRate(PThrdGlbl pTG, UWORD uwBaudRate){ TRACE(("Setting BAUDRATE=%d\r\n", uwBaudRate));
if(MyGetCommState( pTG->Comm.nCid, &(pTG->Comm.dcb))) goto error;
pTG->Comm.dcb.BaudRate = uwBaudRate; pTG->CurrentSerialSpeed = uwBaudRate;
if(MySetCommState( pTG->Comm.nCid, &(pTG->Comm.dcb))) goto error;
return TRUE;
error: (MyDebugPrint(pTG, LOG_ERR, "<<ERROR>> Set Baud Rate --- Can't Get/Set DCB\r\n")); FComGetError(pTG); return FALSE;}
BOOL FComInXOFFHold(PThrdGlbl pTG){ int err; // _must_ be 32bits in Win32
GetCommErrorNT( pTG, (HANDLE) pTG->Comm.nCid, &err, &(pTG->Comm.comstat)); DEBUGSTMT(if(err) D_GotError(pTG, pTG->Comm.nCid, err, &(pTG->Comm.comstat)););
#ifndef WIN32
BG_CHK(!(pTG->Comm.comstat.status & (CSTF_CTSHOLD|CSTF_DSRHOLD|CSTF_RLSDHOLD))); if((pTG->Comm.comstat.status & CSTF_XOFFHOLD) != 0)#else //!WIN32
BG_CHK(!(pTG->Comm.comstat.fCtsHold || pTG->Comm.comstat.fDsrHold || pTG->Comm.comstat.fRlsdHold)); if(pTG->Comm.comstat.fXoffHold)#endif //!WIN32
{ (MyDebugPrint(pTG, LOG_ALL, "In XOFF hold\r\n")); return TRUE; } else return FALSE;}
BOOL FComXon(PThrdGlbl pTG, BOOL fEnable){
if (pTG->fEnableHardwareFlowControl) { (MyDebugPrint(pTG, LOG_ALL, "FComXon = %d IGNORED : h/w flow control \r\n", fEnable)); return TRUE; }
(MyDebugPrint(pTG, LOG_ALL, "FComXon = %d\r\n", fEnable));
// enables/disables flow control
// returns TRUE on success, false on failure
if(MyGetCommState( pTG->Comm.nCid, &(pTG->Comm.dcb))) goto error;
(MyDebugPrint(pTG, LOG_ALL, "FaxXon Before: %02x\r\n", pTG->Comm.dcb.fOutX));
pTG->Comm.dcb.fOutX = fEnable;
if(MySetCommState(pTG->Comm.nCid, &(pTG->Comm.dcb))) goto error;
(MyDebugPrint(pTG, LOG_ALL, "After: %02x\r\n", pTG->Comm.dcb.fOutX)); return TRUE;
error: (MyDebugPrint(pTG, LOG_ERR, "<<ERROR>> FaxXon --- Can't Set/Get DCB\r\n")); FComGetError(pTG); return FALSE;}
void FComFlushQueue(PThrdGlbl pTG, int queue){ int nRet; DWORD lRet;
(MyDebugPrint(pTG, LOG_ALL, "FlushQue = %d\r\n", queue)); ST_FC(D_FComCheck(pTG, pTG->Comm.nCid));//RSL ST_FC(D_FComDumpFlush(pTG, pTG->Comm.nCid, queue));
BG_CHK(queue == 0 || queue == 1);
if (queue == 1) {
MyDebugPrint(pTG, LOG_ALL, "ClearCommCache in FComFlushQueue\n"); ClearCommCache(pTG);
}
if(nRet = MyFlushComm(pTG->Comm.nCid, queue)) { DEBUGSTMT(D_PrintIE(nRet)); (MyDebugPrint(pTG, LOG_ERR, "<<ERROR>> FlushComm failed nRet=%d\r\n", nRet)); FComGetError(pTG); // Throwing away errors that happen here.
// No good reason for it!
} if(queue == 1) { FComInFilterInit(pTG); } else // (queue == 0)
{
// Let's dump any stuff we may have in *our* buffer.
if (pTG->Comm.lpovrCur && pTG->Comm.lpovrCur->dwcb) { (MyDebugPrint(pTG, LOG_ERR, "<<WARNING>> FComFlushQueue:" "Clearing NonNULL pTG->Comm.lpovrCur->dwcb=%lx\r\n", (unsigned long) pTG->Comm.lpovrCur->dwcb)); pTG->Comm.lpovrCur->dwcb=0; ov_unget(pTG, pTG->Comm.lpovrCur); pTG->Comm.lpovrCur=NULL; }
// Lets "drain" -- should always return immediately, because
// we have just purged the output comm buffers.
if (pTG->Comm.fovInited) { BEFORECALL("FLUSH:ov_drain"); ov_drain(pTG, FALSE); AFTERCALL("FLUSH:ov_drain",0); }
// just incase it got stuck due to a mistaken XOFF
if(lRet = MySetXON(pTG->Comm.nCid)) { // Returns the comm error value CE!!
// DEBUGSTMT(D_PrintIE(nRet));
TRACE(("EscapeCommFunc(SETXON) returned %d\r\n", lRet)); FComGetError(pTG); } }}
#ifdef NTF
#define EV_ALL (EV_BREAK|EV_CTS|EV_CTSS|EV_DSR|EV_ERR|EV_PERR|EV_RING|EV_RLSD \
|EV_DSRS|EV_RLSDS|EV_RXCHAR|EV_RXFLAG|EV_TXEMPTY|EV_RINGTE)
#define ALWAYSEVENTS (EV_BREAK | EV_ERR)
// errors + TXEMPTY. Ignore incoming chars
#define DRAINEVENTS (ALWAYSEVENTS | EV_TXEMPTY)
// errors and TXEMPTY (also an error!)
#define WRITEEVENTS (ALWAYSEVENTS | EV_TXEMPTY)
// errors and RXCHAR
#define READLINEEVENTS (ALWAYSEVENTS | EV_RXCHAR)
// errors and RXFLAG (EvtChar already set to ETX)
#define READBUFEVENTS (ALWAYSEVENTS | EV_RXFLAG)
BOOL FComEnableNotify(PThrdGlbl pTG, UWORD uwInTrig, UWORD uwOutTrig, UWORD events){ HANDLE h;
// Used incrementally, so don't clear events!
faxT4log(("EnableCommNotif(hwnd=%d uwIn=%d uwOUt=%d events=%d)\r\n", pTG->FComModem.hwndNotify, uwInTrig, uwOutTrig, events)); h = pTG->FComModem.hwndNotify;
if(!h) { (MyDebugPrint(pTG, LOG_ERR, "<<ERROR>> Can't set Notif -- hwnd=%d\r\n", h)); return TRUE; // Continue anyway
}
if((pTG->Comm.lpEventWord = SetCommEventMask(pTG, pTG->Comm.nCid, events)) && EnableCommNotification(pTG, pTG->Comm.nCid, h, uwInTrig, uwOutTrig)) { // Both return non-zero on success
faxT4log(("ECN succ: %d %d %d %d\r\n", pTG->Comm.nCid, h, uwInTrig, uwOutTrig)); return TRUE; } else { (MyDebugPrint(pTG, LOG_ERR, "<<ERROR>> ECN fail: %d %d %d %d\r\n", pTG->Comm.nCid, h, uwInTrig, uwOutTrig)); FComGetError(pTG); return FALSE; }}#endif // NTF
/***************************************************************************
Name : FComDrain(BOOL fLongTO, BOOL fDrainComm) Purpose : Drain internal buffers. If fDrainComm, wait for Comm ISR Output buffer to drain. Returns when buffer is drained or if no progress is made for DRAINTIMEOUT millisecs. (What about XOFFed sections? Need to set Drain timeout high enough) Parameters: Returns : TRUE on success (buffer drained) FALSE on failure (error or timeout)
Revision Log Num Date Name Description --- -------- ---------- ----------------------------------------------- 101 06/03/92 arulm Created it in a new incarnation***************************************************************************/
// This timeout has to be low at time and high at others. We want it low
// so we don't spend too much time trying to talk to a non-existent modem
// during Init/Setup. However in PhaseC, when the timer expires all we
// do is abort and kill everything. So it serves no purpose to make it
// too low. With the Hayes ESP FIFO card long stretches can elapse without
// any visible "progress", so we fail with that card because we think
// "no progress" is being made
// So....make it short for init/install
// but not too short. Some cmds (e.g. AT&F take a long time)
// Used to be 800ms & seemed to work then, so leave it at that
#define SHORT_DRAINTIMEOUT 800
// So....make it long for PhaseC
// 4secs should be about long enough
#define LONG_DRAINTIMEOUT 4000
BOOL FComDrain(PThrdGlbl pTG, BOOL fLongTO, BOOL fDrainComm){ WORD wTimer = 0; UWORD cbPrevOut = 0xFFFF; BOOL fStuckOnce=FALSE; BOOL fRet=FALSE;
(MyDebugPrint(pTG, LOG_ALL, "Entering Drain\r\n"));
ST_FC(D_FComPrint(pTG, pTG->Comm.nCid)); /** BG_CHK(uwCurrMsg == 0); **/
// We flush our internal buffer here...
if (pTG->Comm.lpovrCur) { int nNumWrote; // Must be 32bits in WIN32
if (!ov_write(pTG, pTG->Comm.lpovrCur, &nNumWrote)) goto done; BG_CHK (pTG->Comm.lpovrCur->eState==eFREE || pTG->Comm.lpovrCur->eState==eIO_PENDING); pTG->Comm.lpovrCur=NULL; (MyDebugPrint(pTG, LOG_ALL, "FComDrain: done writing mybuf.\r\n")); }
if (!fDrainComm) {fRet=TRUE; goto done;}
// +++ Here we drain all our overlapped events..
// If we setup the system comm timeouts properly, we
// don't need to do anything else, except for the XOFF/XON
// stuff...
fRet = ov_drain(pTG, fLongTO); goto done;
done:
return fRet; //+++ was (cbOut == 0);
}
/***************************************************************************
Name : FComDirectWrite(, lpb, cb) Purpose : Write cb bytes starting from lpb to pTG->Comm. If Comm buffer is full, set up notifications and timers and wait until space is available. Returns when all bytes have been written to the Comm buffer or if no progress is made for WRITETIMEOUT millisecs. (What about XOFFed sections? Need to set timeout high enough) Parameters: , lpb, cb Returns : Number of bytes written, i.e. cb on success and <cb on timeout, or error.
Revision Log Num Date Name Description --- -------- ---------- ----------------------------------------------- 101 06/03/92 arulm Created it***************************************************************************/
// This is WRONG -- see below!!
// totally arbitrary should be no more than the time as it would
// take to write WRITEQUANTUM out at the fastest speed
// (say 14400 approx 2 bytes/ms)
// #define WRITETIMEOUT min((WRITEQUANTUM / 2), 200)
// This timeout was too low. We wanted it low so we don't spend too much
// time trying to talk to a non-existent modem during Init/Setup. But in
// those cases we _never_ reach full buffer, so we don't wait here
// we wait in FComDrain(). Here we wait _only_ in PhaseC, so when the
// timer expires all we do is abort and kill everything. So it serves
// no purpose to make it too low. With the Hayes ESP FIFO card long
// stretches can elapse without any visible "progress", so we fail with
// that card because we think "no progress" is being made
// So....make it long
// 2secs should be about long enough
#define WRITETIMEOUT 2000
UWORD FComDirectWrite(PThrdGlbl pTG, LPB lpb, UWORD cb){ DWORD cbLeft = cb;
(MyDebugPrint(pTG, LOG_ALL, "Entering (WIN32) DirectWrite(lpb=0x%08lx cb=%d)\r\n", lpb, cb)); D_SafePrint(pTG, lpb, cb); ST_FC(D_FComPrint(pTG, pTG->Comm.nCid));
while(cbLeft) { DWORD dwcbCopy; DWORD dwcbWrote; int err;
if (!pTG->Comm.lpovrCur) { pTG->Comm.lpovrCur = ov_get(pTG); if (!pTG->Comm.lpovrCur) goto error; BG_CHK(!pTG->Comm.lpovrCur->dwcb); } BG_CHK(pTG->Comm.lpovrCur->eState==eALLOC); BG_CHK(OVBUFSIZE>=pTG->Comm.lpovrCur->dwcb);
dwcbCopy = OVBUFSIZE-pTG->Comm.lpovrCur->dwcb;
if (dwcbCopy>cbLeft) dwcbCopy = cbLeft;
// Copy as much as we can to the overlapped buffer...
_fmemcpy(pTG->Comm.lpovrCur->rgby+pTG->Comm.lpovrCur->dwcb, lpb, dwcbCopy); cbLeft-=dwcbCopy; pTG->Comm.lpovrCur->dwcb+=dwcbCopy; lpb+=dwcbCopy;
// Let's always update comstat here...
GetCommErrorNT( pTG, (HANDLE) pTG->Comm.nCid, &err, &(pTG->Comm.comstat)); DEBUGSTMT(if(err) D_GotError(pTG, pTG->Comm.nCid, err, &(pTG->Comm.comstat)););
(MyDebugPrint(pTG, LOG_ALL, "DirectWrite:: OutQ has %d fDoOverlapped=%d at %ld \n", pTG->Comm.comstat.cbOutQue, pTG->Comm.fDoOverlapped, GetTickCount()));
// We write to comm if our buffer is full or the comm buffer is
// empty or if we're not in overlapped mode...
if (!pTG->Comm.fDoOverlapped || pTG->Comm.lpovrCur->dwcb>=OVBUFSIZE || !pTG->Comm.comstat.cbOutQue) { BOOL fRet = ov_write(pTG, pTG->Comm.lpovrCur, &dwcbWrote); BG_CHK( pTG->Comm.lpovrCur->eState==eIO_PENDING || pTG->Comm.lpovrCur->eState==eFREE); pTG->Comm.lpovrCur=NULL; if (!fRet) goto error; }
} // while (cbLeft)
return cb;
error: return 0;
}
/***************************************************************************
Name : FComFilterReadLine(, lpb, cbSize, pto) Purpose : Reads upto cbSize bytes from Comm into memory starting from lpb. If Comm buffer is empty, set up notifications and timers and wait until characters are available.
Filters out DLE characters. i.e DLE-DLE is reduced to a single DLE, DLE ETX is left intact and DLE-X is deleted.
Returns success (+ve bytes count) when CR-LF has been encountered, and returns failure (-ve bytes count). when either (a) cbSize bytes have been read (i.e. buffer is full) or (b) PTO times out or an error is encountered.
It is critical that this function never returns a timeout, as long as data is still pouring/trickling in. This implies two things (a) FIRST get all that is in the InQue (not more than a line, though), THEN check the timeout. (b) Ensure that at least 1 char-arrival-time at the slowest Comm speed passes between the function entry point and the last time we check for a byte, or between two consecutive checks for a byte, before we return a timeout.
Therefor conditions to return a timeout are Macro timeout over and inter-char timeout over.
In theory the slowest speed we need to worry about is 2400, because that's the slowest we run the Comm at, but be paranoid and assume the modem sends the chars at the same speed that they come in the wire, so slowest is now 300. 1 char-arrival-time is now 1000 / (300/8) == 26.67ms.
If pto expires, returns error, i.e. -ve of the number of bytes read.
Returns : Number of bytes read, i.e. cb on success and -ve of number of bytes read on timeout. 0 is a timeout error with no bytes read.
Revision Log Num Date Name Description --- -------- ---------- ----------------------------------------------- 101 06/03/92 arulm Created it***************************************************************************/
// totally arbitrary
#define READLINETIMEOUT 50
#define ONECHARTIME (30 * 2) // see above *2 to be safe
// void WINAPI OutputDebugStr(LPSTR);
// char szJunk[200];
SWORD FComFilterReadLine(PThrdGlbl pTG, LPB lpb, UWORD cbSize, LPTO lptoRead){ WORD wTimer = 0; UWORD cbIn = 0, cbGot = 0; LPB lpbNext; BOOL fPrevDLE = 0; SWORD i, beg;
(MyDebugPrint(pTG, LOG_ALL, "in FilterReadLine(lpb=0x%08lx cb=%d timeout=%lu)\r\n", lpb, cbSize, lptoRead->ulTimeout)); BG_CHK(cbSize>2); ST_FC(D_FComPrint(pTG, pTG->Comm.nCid));
cbSize--; // make room for terminal NULL
lpbNext = lpb; // we write the NULL to *lpbNext, so init this NOW!
cbGot = 0; // return value (even err return) is cbGot. Init NOW!!
fPrevDLE=0;
//
// check the cache first.
//
if ( ! pTG->CommCache.dwCurrentSize) { MyDebugPrint(pTG, LOG_ALL, "Cache is empty. Resetting comm cache.\n");
ClearCommCache(pTG);
if ( ! FComFilterFillCache(pTG, cbSize, lptoRead) ) { MyDebugPrint(pTG, LOG_ERR, "ERROR: FillCache failed \n"); goto error; } }
while (1) { if ( ! pTG->CommCache.dwCurrentSize) { MyDebugPrint(pTG, LOG_ERR, "ERROR: Cache is empty after FillCache\n"); goto error; }
MyDebugPrint(pTG, LOG_ALL, "Cache: size=%d, offset=%d\n", pTG->CommCache.dwCurrentSize, pTG->CommCache.dwOffset);
lpbNext = pTG->CommCache.lpBuffer + pTG->CommCache.dwOffset;
if (pTG->CommCache.dwCurrentSize >= 3) { MyDebugPrint(pTG, LOG_ALL, "1=%x 2=%x 3=%x 4=%x 5=%x 6=%x 7=%x 8=%x 9=%x / %d=%x, %d=%x, %d=%x \n", *lpbNext, *(lpbNext+1), *(lpbNext+2), *(lpbNext+3), *(lpbNext+4), *(lpbNext+5), *(lpbNext+6), *(lpbNext+7), *(lpbNext+8), pTG->CommCache.dwCurrentSize-3, *(lpbNext+ pTG->CommCache.dwCurrentSize-3), pTG->CommCache.dwCurrentSize-2, *(lpbNext+ pTG->CommCache.dwCurrentSize-2), pTG->CommCache.dwCurrentSize-1, *(lpbNext+ pTG->CommCache.dwCurrentSize-1) ); } else { MyDebugPrint(pTG, LOG_ALL, "1=%x 2=%x \n", *lpbNext, *(lpbNext+1) ); }
for (i=0, beg=0; i< (SWORD) pTG->CommCache.dwCurrentSize; i++) {
if (i > 0 ) { if ( ( *(pTG->CommCache.lpBuffer + pTG->CommCache.dwOffset + i - 1) == CR ) && ( *(pTG->CommCache.lpBuffer + pTG->CommCache.dwOffset + i) == LF ) ) {
if ( i - beg >= cbSize) {
// line too long. try next one.
MyDebugPrint(pTG, LOG_ERR, "Line len=%d is longer than bufsize=%d Found in cache pos=%d, CacheSize=%d, Offset=%d \n", i-beg, cbSize, i+1, pTG->CommCache.dwCurrentSize, pTG->CommCache.dwOffset); beg = i + 1; continue; }
// found the line.
CopyMemory (lpb, (pTG->CommCache.lpBuffer + pTG->CommCache.dwOffset + beg), (i - beg + 1) );
pTG->CommCache.dwOffset += (i+1); pTG->CommCache.dwCurrentSize -= (i+1); *(lpb+i-beg+1) = 0;
MyDebugPrint(pTG, LOG_ALL, "Found in cache pos=%d, CacheSize=%d, Offset=%d \n", i+1, pTG->CommCache.dwCurrentSize, pTG->CommCache.dwOffset);
return ( i-beg+1 );
} } }
// we get here if we didn't find CrLf in Cache
MyDebugPrint(pTG, LOG_ALL, "Cache wasn't empty but we didn't find CrLf\n");
// if cache too big (and we have not found anything anyway) --> clean it
if (pTG->CommCache.dwCurrentSize >= cbSize) { MyDebugPrint(pTG, LOG_ALL, "ClearCommCache\n"); ClearCommCache(pTG); } else if ( ! pTG->CommCache.dwCurrentSize) { MyDebugPrint(pTG, LOG_ALL, "Cache is empty. Resetting comm cache.\n"); ClearCommCache(pTG); }
if ( ! FComFilterFillCache(pTG, cbSize, lptoRead) ) { MyDebugPrint(pTG, LOG_ERR, "ERROR: FillCache failed \n"); goto error; } }
error: ClearCommCache(pTG); return (0);
}
int FComFilterFillCache(PThrdGlbl pTG, UWORD cbSize, LPTO lptoRead){
WORD wTimer = 0; UWORD cbGot = 0, cbAvail = 0; DWORD cbRequested = 0; char lpBuffer[4096]; LPB lpbNext; int nNumRead; // _must_ be 32 bits in Win32!!
LPOVERLAPPED lpOverlapped; COMMTIMEOUTS cto; DWORD dwLastErr; DWORD dwTimeoutRead; char *pSrc; char *pDest; DWORD i, j; DWORD dwErr; COMSTAT ErrStat; DWORD NumHandles=2; HANDLE HandlesArray[2]; DWORD WaitResult;
HandlesArray[1] = pTG->AbortReqEvent;
dwTimeoutRead = (DWORD) (lptoRead->ulEnd - lptoRead->ulStart); if (dwTimeoutRead < 0) { dwTimeoutRead = 0; }
lpbNext = lpBuffer;
(MyDebugPrint(pTG, LOG_ALL, "in FilterReadCache: cb=%d to=%d\r\n", cbSize, dwTimeoutRead));
// we want to request the read such that we will be back
// no much later than dwTimeOut either with the requested
// amount of data or without it.
cbRequested = cbSize;
// use COMMTIMEOUTS to detect there are no more data
cto.ReadIntervalTimeout = 50; // 30 ms is during negotiation frames; del(ff, 2ndchar> = 54 ms with USR 28.8
cto.ReadTotalTimeoutMultiplier = 0; cto.ReadTotalTimeoutConstant = dwTimeoutRead; // RSL may want to set first time ONLY
cto.WriteTotalTimeoutMultiplier = WRITE_TOTAL_TIMEOUT_MULTIPLIER; cto.WriteTotalTimeoutConstant = WRITE_TOTAL_TIMEOUT_CONSTANT; if (!SetCommTimeouts((HANDLE) pTG->Comm.nCid, &cto)) { MyDebugPrint(pTG, LOG_ERR, "ERROR: SetCommTimeouts fails for handle %lx , le=%x\n", (unsigned long) pTG->Comm.nCid, GetLastError()); }
lpOverlapped = &pTG->Comm.ovAux;
(lpOverlapped)->Internal = (lpOverlapped)->InternalHigh = (lpOverlapped)->Offset = \ (lpOverlapped)->OffsetHigh = 0;
if ((lpOverlapped)->hEvent) ResetEvent((lpOverlapped)->hEvent);
nNumRead = 0;
MyDebugPrint(pTG, LOG_ALL, "Before ReadFile Req=%d time=%ld \n", cbRequested, GetTickCount() );
if (! ReadFile( (HANDLE) pTG->Comm.nCid, lpbNext, cbRequested, &nNumRead, &pTG->Comm.ovAux) ) { if ( (dwLastErr = GetLastError() ) == ERROR_IO_PENDING) {
//
// We want to be able to un-block ONCE only from waiting on I/O when the AbortReqEvent is signaled.
//
if (pTG->fAbortRequested) {
if (pTG->fOkToResetAbortReqEvent && (!pTG->fAbortReqEventWasReset)) { MyDebugPrint(pTG, LOG_ALL, "FComFilterFillCache RESETTING AbortReqEvent at %lx\n",GetTickCount() ); pTG->fAbortReqEventWasReset = 1; ResetEvent(pTG->AbortReqEvent); }
pTG->fUnblockIO = 1; }
HandlesArray[0] = pTG->Comm.ovAux.hEvent;
if (pTG->fUnblockIO) { NumHandles = 1; } else { NumHandles = 2; }
WaitResult = WaitForMultipleObjects(NumHandles, HandlesArray, FALSE, WAIT_FCOM_FILTER_FILLCACHE_TIMEOUT);
if (WaitResult == WAIT_TIMEOUT) { MyDebugPrint(pTG, LOG_ERR, "ERROR: FComFilterFillCache: WaitForMultipleObjects TIMEOUT at %ld\n", GetTickCount() );
ClearCommCache(pTG); goto error; }
if (WaitResult == WAIT_FAILED) { MyDebugPrint(pTG, LOG_ERR, "FComFilterFillCache: WaitForMultipleObjects FAILED le=%lx NumHandles=%d at %ld \n", GetLastError(), NumHandles, GetTickCount() );
ClearCommCache(pTG); goto error; }
if ( (NumHandles == 2) && (WaitResult == WAIT_OBJECT_0 + 1) ) { pTG->fUnblockIO = 1; MyDebugPrint(pTG, LOG_ALL, "FComFilterFillCache ABORTed at %ld \n", GetTickCount() ); ClearCommCache(pTG); goto error; }
if ( ! GetOverlappedResult ( (HANDLE) pTG->Comm.nCid, &pTG->Comm.ovAux, &nNumRead, TRUE) ) { MyDebugPrint(pTG, LOG_ERR, "ERROR: GetOverlappedResult le=%x at %ld \n", GetLastError(), GetTickCount() ); if (! ClearCommError( (HANDLE) pTG->Comm.nCid, &dwErr, &ErrStat) ) { MyDebugPrint(pTG, LOG_ERR, "ERROR: ClearCommError le=%x at %ld \n", GetLastError(), GetTickCount() ); } else { MyDebugPrint(pTG, LOG_ERR, "ClearCommError dwErr=%x ErrSTAT: Cts=%d Dsr=%d Rls=%d XoffHold=%d XoffSent=%d fEof=%d Txim=%d In=%d Out=%d \n", dwErr, ErrStat.fCtsHold, ErrStat.fDsrHold, ErrStat.fRlsdHold, ErrStat.fXoffHold, ErrStat.fXoffSent, ErrStat.fEof, ErrStat.fTxim, ErrStat.cbInQue, ErrStat.cbOutQue); }
goto error; } } else { MyDebugPrint(pTG, LOG_ERR, "ERROR: ReadFile le=%x \n", GetTickCount() ); goto error; } } else { MyDebugPrint(pTG, LOG_ALL, "WARNING: ReadFile returned w/o WAIT\n"); }
MyDebugPrint(pTG, LOG_ALL, "After ReadFile Req=%d Ret=%d time=%ld \n", cbRequested, nNumRead, GetTickCount() );
cbAvail = (UWORD)nNumRead;
if (!cbAvail) { MyDebugPrint(pTG, LOG_ERR, "ERROR: 0 read\n"); goto error; }
// filter DLE stuff
pSrc = lpbNext; pDest = pTG->CommCache.lpBuffer + pTG->CommCache.dwOffset+ pTG->CommCache.dwCurrentSize;
for (i=0, j=0; i<cbAvail; ) {
if ( *(pSrc+i) == DLE) { if ( *(pSrc+i+1) == DLE ) { *(pDest+j) = DLE; j += 1; i += 2; } else if ( *(pSrc+i+1) == ETX ) { *(pDest+j) = DLE; *(pDest+j+1) = ETX; j += 2; i += 2; } else { i += 2; } } else { *(pDest+j) = *(pSrc+i); i++; j++; } }
pTG->CommCache.dwCurrentSize += j; return TRUE;
error: return FALSE;
}
/***************************************************************************
Name : FComDirectReadBuf(, lpb, cbSize, lpto, pfEOF) Purpose : Reads upto cbSize bytes from Comm into memory starting from lpb. If Comm buffer is empty, set up notifications and timers and wait until characters are available.
Returns when success (+ve byte count) either (a) cbSize bytes have been read or (b) DLE-ETX has been encountered (in which case *pfEOF is set to TRUE).
Does no filtering. Reads the Comm buffer in large quanta.
If lpto expires, returns error, i.e. -ve of the number of bytes read.
Returns : Number of bytes read, i.e. cb on success and -ve of number of bytes read on timeout. 0 is a timeout error with no bytes read.
Revision Log Num Date Name Description --- -------- ---------- ----------------------------------------------- 101 06/03/92 arulm Created it***************************************************************************/
// +++ #define READBUFQUANTUM (pTG->Comm.cbInSize / 8)
// totally arbitrary
// +++ #define READBUFTIMEOUT 200
// *lpswEOF is 1 on Class1 EOF, 0 on non-EOF, -1 on Class2 EOF, -2 on error -3 on timeout
UWORD FComFilterReadBuf(PThrdGlbl pTG, LPB lpb, UWORD cbSize, LPTO lptoRead, BOOL fClass2, LPSWORD lpswEOF){ WORD wTimer = 0; UWORD cbGot = 0, cbAvail = 0; DWORD cbRequested = 0; LPB lpbNext; int nNumRead; // _must_ be 32 bits in Win32!!
LPOVERLAPPED lpOverlapped; COMMTIMEOUTS cto; DWORD dwLastErr; DWORD dwTimeoutRead; DWORD cbFromCache = 0; DWORD dwErr; COMSTAT ErrStat; DWORD NumHandles=2; HANDLE HandlesArray[2]; DWORD WaitResult;
HandlesArray[1] = pTG->AbortReqEvent;
dwTimeoutRead = (DWORD) (lptoRead->ulEnd - lptoRead->ulStart); if (dwTimeoutRead < 0) { dwTimeoutRead = 0; }
(MyDebugPrint(pTG, LOG_ALL, "in FilterReadBuf: lpb=0x%08lx cb=%d to=%d\r\n", lpb, cbSize, dwTimeoutRead));
BG_CHK((BOOL)pTG->Comm.dcb.fOutX == FALSE); // Dont want to take ^Q/^S from modem to
// be XON/XOFF in the receive data phase!!
// BG_CHK(lpb && cbSize>2 && lptoRead && lpswEOF && *lpswEOF == 0);
BG_CHK(lpb && cbSize>3 && lptoRead && lpswEOF);
*lpswEOF=0;
ST_FC(D_FComPrint(pTG, pTG->Comm.nCid)); // BG_CHK(Filter.fStripDLE); // Always on
/** BG_CHK(uwCurrMsg == 0); **/
// Leave TWO spaces at start to make sure Out pointer will
// never get ahead of the In pointer in StripBuf, even
// if the last byte of prev block was DLE & first byte
// of this one is SUB (i.e need to insert two DLEs in
// output).
// Save a byte at end for the NULL terminator (Why? Dunno...)
lpb += 2; cbSize -= 3;
cbRequested = cbSize;
for(lpbNext=lpb;;) {
MyDebugPrint(pTG, LOG_ALL, "in FilterReadBuf LOOP cbSize=%d cbGot=%d cbAvail=%d at %ld\r\n", cbSize, cbGot, cbAvail, GetTickCount() );
#if 0
//
// just in case. RSL 970123
//
if (! ClearCommError( (HANDLE) pTG->Comm.nCid, &dwErr, &ErrStat) ) { MyDebugPrint(pTG, LOG_ERR, "ERROR: ClearCommError le=%x at %ld \n", GetLastError(), GetTickCount() ); } else { MyDebugPrint(pTG, LOG_ERR, "ClearCommError dwErr=%x ErrSTAT: Cts=%d Dsr=%d Rls=%d XoffHold=%d XoffSent=%d fEof=%d Txim=%d In=%d Out=%d \n", dwErr, ErrStat.fCtsHold, ErrStat.fDsrHold, ErrStat.fRlsdHold, ErrStat.fXoffHold, ErrStat.fXoffSent, ErrStat.fEof, ErrStat.fTxim, ErrStat.cbInQue, ErrStat.cbOutQue); }#endif
if((cbSize - cbGot) < cbAvail) { cbAvail = cbSize - cbGot; }
if( (!cbGot) && !checkTimeOut(pTG, lptoRead) ) { // No chars available *and* lptoRead expired
MyDebugPrint(pTG, LOG_ERR, "ERROR: ReadLn:Timeout %ld-toRd=%ld start=%ld \n", GetTickCount(), lptoRead->ulTimeout, lptoRead->ulStart); goto failure; }
// check Comm cache first (AT+FRH leftovers)
if ( pTG->CommCache.fReuse && pTG->CommCache.dwCurrentSize ) { MyDebugPrint(pTG, LOG_ALL, "CommCache will REUSE %d offset=%d 0=%x 1=%x \n", pTG->CommCache.dwCurrentSize, pTG->CommCache.dwOffset, *(pTG->CommCache.lpBuffer + pTG->CommCache.dwOffset), *(pTG->CommCache.lpBuffer + pTG->CommCache.dwOffset+1) );
if ( pTG->CommCache.dwCurrentSize >= cbRequested) { CopyMemory (lpbNext, pTG->CommCache.lpBuffer + pTG->CommCache.dwOffset, cbRequested);
pTG->CommCache.dwOffset += cbRequested; pTG->CommCache.dwCurrentSize -= cbRequested;
cbAvail = (UWORD) cbRequested; cbRequested = 0;
MyDebugPrint(pTG, LOG_ALL, "CommCache still left; no need to read\n");
goto l_merge; } else { cbFromCache = pTG->CommCache.dwCurrentSize;
CopyMemory (lpbNext, pTG->CommCache.lpBuffer + pTG->CommCache.dwOffset, cbFromCache);
ClearCommCache(pTG);
cbRequested -= cbFromCache;
MyDebugPrint(pTG, LOG_ALL, "CommCache used all %d \n", cbFromCache); } }
// use COMMTIMEOUTS to detect there are no more data
cto.ReadIntervalTimeout = 20; // 0 RSL make 15 later
cto.ReadTotalTimeoutMultiplier = 0; cto.ReadTotalTimeoutConstant = dwTimeoutRead; // RSL may want to set first time ONLY
cto.WriteTotalTimeoutMultiplier = WRITE_TOTAL_TIMEOUT_MULTIPLIER; cto.WriteTotalTimeoutConstant = WRITE_TOTAL_TIMEOUT_CONSTANT; if (!SetCommTimeouts((HANDLE) pTG->Comm.nCid, &cto)) { MyDebugPrint(pTG, LOG_ERR, "ERROR: SetCommTimeouts fails for handle %lx , le=%x\n", (unsigned long) pTG->Comm.nCid, GetLastError()); }
lpOverlapped = &pTG->Comm.ovAux;
(lpOverlapped)->Internal = (lpOverlapped)->InternalHigh = (lpOverlapped)->Offset = \ (lpOverlapped)->OffsetHigh = 0;
if ((lpOverlapped)->hEvent) ResetEvent((lpOverlapped)->hEvent);
nNumRead = 0;
MyDebugPrint(pTG, LOG_ALL, "Before ReadFile Req=%d time=%ld \n", cbRequested, GetTickCount() );
if (! ReadFile( (HANDLE) pTG->Comm.nCid, lpbNext+cbFromCache, cbRequested, &nNumRead, &pTG->Comm.ovAux) ) { if ( (dwLastErr = GetLastError() ) == ERROR_IO_PENDING) {
// We want to be able to un-block ONCE only from waiting on I/O when the AbortReqEvent is signaled.
//
if (pTG->fAbortRequested) {
if (pTG->fOkToResetAbortReqEvent && (!pTG->fAbortReqEventWasReset)) { MyDebugPrint(pTG, LOG_ALL, "FComFilterReadBuffer RESETTING AbortReqEvent at %lx\n",GetTickCount() ); pTG->fAbortReqEventWasReset = 1; ResetEvent(pTG->AbortReqEvent); }
pTG->fUnblockIO = 1; *lpswEOF = -2; return cbGot;
}
HandlesArray[0] = pTG->Comm.ovAux.hEvent; HandlesArray[1] = pTG->AbortReqEvent;
if (pTG->fUnblockIO) { NumHandles = 1; } else { NumHandles = 2; }
WaitResult = WaitForMultipleObjects(NumHandles, HandlesArray, FALSE, WAIT_FCOM_FILTER_READBUF_TIMEOUT);
if (WaitResult == WAIT_TIMEOUT) { MyDebugPrint(pTG, LOG_ERR, "ERROR: FComFilterReadBuf: WaitForMultipleObjects TIMEOUT at %ld\n", GetTickCount() ); ClearCommCache(pTG);
goto failure; }
if (WaitResult == WAIT_FAILED) { MyDebugPrint(pTG, LOG_ERR, "FComFilterReadBuf: WaitForMultipleObjects FAILED le=%lx at %ld \n", GetLastError(), GetTickCount() );
ClearCommCache(pTG);
goto failure;
}
if ( (NumHandles == 2) && (WaitResult == WAIT_OBJECT_0 + 1) ) { pTG->fUnblockIO = 1; MyDebugPrint(pTG, LOG_ALL, "FComFilterReadBuf ABORTed at %ld \n", GetTickCount() ); ClearCommCache(pTG); *lpswEOF = -2; return cbGot; }
if ( ! GetOverlappedResult ( (HANDLE) pTG->Comm.nCid, &pTG->Comm.ovAux, &nNumRead, TRUE) ) {
MyDebugPrint(pTG, LOG_ERR, "ERROR: GetOverlappedResult le=%x at %ld \n", GetLastError(), GetTickCount() ); if (! ClearCommError( (HANDLE) pTG->Comm.nCid, &dwErr, &ErrStat) ) { MyDebugPrint(pTG, LOG_ERR, "ERROR: ClearCommError le=%x at %ld \n", GetLastError(), GetTickCount() ); } else { MyDebugPrint(pTG, LOG_ERR, "ClearCommError dwErr=%x ErrSTAT: Cts=%d Dsr=%d Rls=%d XoffHold=%d XoffSent=%d fEof=%d Txim=%d In=%d Out=%d \n", dwErr, ErrStat.fCtsHold, ErrStat.fDsrHold, ErrStat.fRlsdHold, ErrStat.fXoffHold, ErrStat.fXoffSent, ErrStat.fEof, ErrStat.fTxim, ErrStat.cbInQue, ErrStat.cbOutQue); }
goto failure; } } else { MyDebugPrint(pTG, LOG_ERR, "ERROR: ReadFile le=%x at %ld \n", dwLastErr, GetTickCount() ); goto failure; } } else { MyDebugPrint(pTG, LOG_ALL, "WARNING: ReadFile returned w/o WAIT\n"); }
MyDebugPrint(pTG, LOG_ALL, "After ReadFile Req=%d Ret=%d time=%ld \n", cbRequested, nNumRead, GetTickCount() );
cbAvail = (UWORD) (nNumRead + cbFromCache);
l_merge: // RSL PUTBACK INMON(pTG, lpbNext, cbAvail);
if(!cbAvail) { MyDebugPrint(pTG, LOG_ALL, "cbAvail = %d --> continue \n", cbAvail); continue; } // else we just drop through
// try to catch COMM read problems
MyDebugPrint(pTG, LOG_ALL, "DEBUG: Just read %d bytes, from cache =%d, log [%x .. %x], 1st=%x last=%x \n", nNumRead, cbFromCache, pTG->CommLogOffset, (pTG->CommLogOffset+cbAvail), *lpbNext, *(lpbNext+cbAvail-1) );
// RSL TEMP. Check T4 problems.
if (gT30.T4LogLevel) { _lwrite(ghComLogFile, lpbNext, cbAvail); }
pTG->CommLogOffset += cbAvail;
cbAvail = FComStripBuf(pTG, lpbNext-2, lpbNext, cbAvail, fClass2, lpswEOF); BG_CHK(*lpswEOF == 0 || *lpswEOF == -1 || *lpswEOF == 1);
MyDebugPrint(pTG, LOG_ALL, "After FComStripBuf cbAvail=%ld \n", cbAvail );
cbGot += cbAvail; lpbNext += cbAvail;
// RSL 970123. Dont wanna loop if got anything.
if ( (*lpswEOF != 0) || (cbGot > 0) ) { // some eof or full buf
goto done; }
} BG_CHK(FALSE);
*lpswEOF = -2; goto done;
failure:
;
//timeout:
*lpswEOF = -3; // fall through to done
done:
(MyDebugPrint(pTG, LOG_ALL, "ex FilterReadBuf: cbGot=%d swEOF=%d\r\n", cbGot, *lpswEOF)); return cbGot;}
void FComCritical(PThrdGlbl pTG, BOOL x){ if (x) pTG->Comm.bDontYield++; else if (pTG->Comm.bDontYield) pTG->Comm.bDontYield--; else {BG_CHK(FALSE);}
#ifdef DEBUG
if (pTG->Comm.bDontYield) {(MyDebugPrint(pTG, LOG_ALL, "Exiting NESTED FComCritical\r\n"));}#endif
}
#if !defined(WFW) && !defined(WFWBG)
BOOL FComCheckRing(PThrdGlbl pTG){ int err; // must be 32 bits in WIN32
BOOL fRet=0; COMSTAT comstatCheckActivity;
BG_CHK(pTG->Comm.nCid >= 0); GetCommErrorNT( pTG, (HANDLE) pTG->Comm.nCid, &err, &comstatCheckActivity);
if(err) { (MyDebugPrint(pTG, LOG_ERR, "<<ERROR>> NCUCheckRing: Got Comm Error %04x\r\n", err)); D_GotError(pTG, pTG->Comm.nCid, err, &comstatCheckActivity); }
fRet = (comstatCheckActivity.cbInQue > 0);
// get rid of RING sitting in buffer,
// or well wait until kingdom come with it
// in some situations, like someone refuses to
// answer or we have a full recv-filename-cache
MyFlushComm(pTG->Comm.nCid, 0); MyFlushComm(pTG->Comm.nCid, 1);
(MyDebugPrint(pTG, LOG_ALL, "CheckRing: fRet=%d Q=%d\r\n", fRet, comstatCheckActivity.cbInQue));
return fRet;}
#endif //!WFWBG
BOOLFComGetOneChar( PThrdGlbl pTG, UWORD ch)
{ BYTE rgbRead[10]; // must be 3 or more. 10 for safety
TO toCtrlQ; int nNumRead; // _must_ be 32 bits in WIN32
LPOVERLAPPED lpOverlapped; DWORD dwErr; COMSTAT ErrStat; DWORD NumHandles=2; HANDLE HandlesArray[2]; DWORD WaitResult; DWORD dwLastErr; SWORD i;
HandlesArray[1] = pTG->AbortReqEvent;
//
// check the cache first.
//
if ( ! pTG->CommCache.dwCurrentSize) { MyDebugPrint(pTG, LOG_ALL, "FComGetOneChar: Cache is empty. Resetting comm cache.\n");
ClearCommCache(pTG); } else { for (i=0; i< (SWORD) pTG->CommCache.dwCurrentSize; i++) { if ( *(pTG->CommCache.lpBuffer + pTG->CommCache.dwOffset + i) == ch) { // found in cache
MyDebugPrint(pTG, LOG_ALL, "FComGetOneChar: Found XON in cache pos=%d total=%d\n", i, pTG->CommCache.dwCurrentSize); pTG->CommCache.dwOffset += (i+1); pTG->CommCache.dwCurrentSize -= (i+1);
goto GotCtrlQ;
} }
MyDebugPrint(pTG, LOG_ALL, "FComGetOneChar: Cache wasn't empty. Didn't find XON. Resetting comm cache.\n"); ClearCommCache(pTG); }
// Send nothing - look for cntl-Q (XON) after connect
BG_CHK(ch == 0x11); // so far looking for just ctrlQ
startTimeOut(pTG, &toCtrlQ, 1000); do { ////MyReadComm(Comm.nCid, rgbRead, 1, &nNumRead);
lpOverlapped = &pTG->Comm.ovAux; (lpOverlapped)->Internal = (lpOverlapped)->InternalHigh = (lpOverlapped)->Offset = \ (lpOverlapped)->OffsetHigh = 0; if ((lpOverlapped)->hEvent) ResetEvent((lpOverlapped)->hEvent); nNumRead = 0; MyDebugPrint(pTG, LOG_ALL, "Before ReadFile Req=%d time=%ld \n", 1, GetTickCount() );
if (! ReadFile( (HANDLE) pTG->Comm.nCid, rgbRead, 1, &nNumRead, &pTG->Comm.ovAux) ) { if ( (dwLastErr = GetLastError() ) == ERROR_IO_PENDING) { // We want to be able to un-block ONCE only from waiting on I/O when the AbortReqEvent is signaled.
//
if (pTG->fAbortRequested) { if (pTG->fOkToResetAbortReqEvent && (!pTG->fAbortReqEventWasReset)) { MyDebugPrint(pTG, LOG_ALL, "FComGetOneChar RESETTING AbortReqEvent at %lx\n",GetTickCount() ); pTG->fAbortReqEventWasReset = 1; ResetEvent(pTG->AbortReqEvent); } pTG->fUnblockIO = 1; goto error; } HandlesArray[0] = pTG->Comm.ovAux.hEvent; HandlesArray[1] = pTG->AbortReqEvent; if (pTG->fUnblockIO) { NumHandles = 1; } else { NumHandles = 2; } WaitResult = WaitForMultipleObjects(NumHandles, HandlesArray, FALSE, WAIT_FCOM_FILTER_READBUF_TIMEOUT); if (WaitResult == WAIT_TIMEOUT) { MyDebugPrint(pTG, LOG_ERR, "ERROR: FComGetOneChar: WaitForMultipleObjects TIMEOUT at %ld\n", GetTickCount() ); ClearCommCache(pTG); goto error; } if (WaitResult == WAIT_FAILED) { MyDebugPrint(pTG, LOG_ERR, "FComGetOneChar: WaitForMultipleObjects FAILED le=%lx at %ld \n", GetLastError(), GetTickCount() ); ClearCommCache(pTG); goto error; } if ( (NumHandles == 2) && (WaitResult == WAIT_OBJECT_0 + 1) ) { pTG->fUnblockIO = 1; MyDebugPrint(pTG, LOG_ALL, "FComGetOneChar ABORTed at %ld \n", GetTickCount() ); ClearCommCache(pTG); goto error; } if ( ! GetOverlappedResult ( (HANDLE) pTG->Comm.nCid, &pTG->Comm.ovAux, &nNumRead, TRUE) ) { MyDebugPrint(pTG, LOG_ERR, "ERROR: FComGetOneChar GetOverlappedResult le=%x at %ld \n", GetLastError(), GetTickCount() ); if (! ClearCommError( (HANDLE) pTG->Comm.nCid, &dwErr, &ErrStat) ) { MyDebugPrint(pTG, LOG_ERR, "ERROR: FComGetOneChar ClearCommError le=%x at %ld \n", GetLastError(), GetTickCount() ); } else { MyDebugPrint(pTG, LOG_ERR, "FComGetOneChar ClearCommError dwErr=%x ErrSTAT: Cts=%d Dsr=%d Rls=%d XoffHold=%d XoffSent=%d fEof=%d Txim=%d In=%d Out=%d \n", dwErr, ErrStat.fCtsHold, ErrStat.fDsrHold, ErrStat.fRlsdHold, ErrStat.fXoffHold, ErrStat.fXoffSent, ErrStat.fEof, ErrStat.fTxim, ErrStat.cbInQue, ErrStat.cbOutQue); } goto error; } } else { MyDebugPrint(pTG, LOG_ERR, "ERROR: FComGetOneChar ReadFile le=%x at %ld \n", dwLastErr, GetTickCount() ); goto error; } } else { MyDebugPrint(pTG, LOG_ALL, "WARNING: FComGetOneChar ReadFile returned w/o WAIT\n"); } MyDebugPrint(pTG, LOG_ALL, "After FComGetOneChar ReadFile Req=%d Ret=%d time=%ld \n", 1, nNumRead, GetTickCount() );
switch(nNumRead) { case 0: break; // loop until we get something
case 1: // INMON(rgbRead, 1);
if(rgbRead[0] == ch) goto GotCtrlQ; else { ERRMSG(("<<ERROR>> GetCntlQ: Found non ^Q char\n\r")); goto error; } default: BG_CHK(FALSE); goto error; } } while(checkTimeOut(pTG, &toCtrlQ)); ////ERRMSG(("<<ERROR>> GetCntlQ: Timed out\n\r"));
goto error;
GotCtrlQ: ////TRACE(("GetCntlQ: YES!!! Found cntl q\n\r"));
return TRUE;
error: return FALSE;}
/*****
#ifdef USE_HWND
# define MyGetMessage(x) \
( GetMessage(&x, NULL, 0, 0), \ (x.hwnd ? (DispatchMessage(&x), x.message=WM_NULL) : 0), \ (x.message != WM_QUIT) )
# define MyPeekMessage(x) \
( (x.message=WM_NULL), \ ( PeekMessage(&x, NULL, 0, 0, PM_RNOY) ? \ (x.hwnd ? (DispatchMessage(&x), x.message=WM_NULL) : TRUE) \ : FALSE ) )#else
# define MyGetMessage(x) ( GetMessage(&x, NULL, 0, 0), \
BG_CHK(x.hwnd==0), \ (x.message != IF_QUIT) )
# define MyPeekMessage(x) ( (x.message = WM_NULL), \
PeekMessage(&x, NULL, 0, 0, PM_RNOY), \ BG_CHK(x.hwnd==0), \ (x.message != WM_NULL) )#endif
*****/
#ifdef MDRV
extern void iModemParamsReset(PThrdGlbl pTG);extern void iModemInitGlobals(PThrdGlbl pTG);#endif
#define szMODULENAME "awfxio32"
OVREC *ov_get(PThrdGlbl pTG){ OVREC *lpovr=NULL;
(MyDebugPrint(pTG, LOG_ALL, "In ov_get at %ld \n", GetTickCount() ) );
if (!pTG->Comm.covAlloced) { BG_CHK(!pTG->Comm.uovLast && !pTG->Comm.uovFirst); lpovr = pTG->Comm.rgovr; BG_CHK(lpovr->eState==eFREE); BG_CHK(!(lpovr->dwcb)); } else { UINT uNewLast = (pTG->Comm.uovLast+1) % NUM_OVS;
(MyDebugPrint(pTG, LOG_ALL, "iov_flush: 1st=%d, last=%d \n", pTG->Comm.uovFirst, pTG->Comm.uovLast) );
lpovr = pTG->Comm.rgovr+uNewLast; if (uNewLast != pTG->Comm.uovFirst) { BG_CHK(lpovr->eState==eFREE); } else { BG_CHK(lpovr->eState==eIO_PENDING); if (!iov_flush(pTG, lpovr, TRUE)) { BG_CHK(lpovr->eState==eALLOC); ov_unget(pTG, lpovr); lpovr=NULL; // We fail if a flush operation failed...
} else { BG_CHK(lpovr->eState==eALLOC); pTG->Comm.uovFirst = (pTG->Comm.uovFirst+1) % NUM_OVS; } } if (lpovr) pTG->Comm.uovLast = uNewLast; } if (lpovr && lpovr->eState!=eALLOC) { BG_CHK(lpovr->eState==eFREE && !lpovr->dwcb); BG_CHK(pTG->Comm.covAlloced < NUM_OVS); pTG->Comm.covAlloced++; lpovr->eState=eALLOC; } return lpovr;}
BOOL ov_unget(PThrdGlbl pTG, OVREC *lpovr){ BOOL fRet = FALSE;
(MyDebugPrint(pTG, LOG_ALL, "In ov_UNget lpovr=%lx at %ld \n", lpovr, GetTickCount() ) );
if (lpovr->eState!=eALLOC || !pTG->Comm.covAlloced || lpovr!=(pTG->Comm.rgovr+pTG->Comm.uovLast)) { (MyDebugPrint(pTG, LOG_ERR, "ov_unget: invalid lpovr.\r\n")); BG_CHK(FALSE); goto end; }
BG_CHK(!lpovr->dwcb);
if (pTG->Comm.covAlloced==1) { BG_CHK(pTG->Comm.uovLast == pTG->Comm.uovFirst); pTG->Comm.uovLast = pTG->Comm.uovFirst = 0; } else { pTG->Comm.uovLast = (pTG->Comm.uovLast)? (pTG->Comm.uovLast-1) : (NUM_OVS-1); } pTG->Comm.covAlloced--; lpovr->eState=eFREE; fRet = TRUE;
end: return fRet;}
BOOL ov_write(PThrdGlbl pTG, OVREC *lpovr, LPDWORD lpdwcbWrote){ // Write out the buffer associated with lpovr.
BG_CHK(lpovr->eState==eALLOC); if (!lpovr->dwcb) { ov_unget(pTG, lpovr); lpovr=NULL; } else { BOOL fRet; DWORD dw; int err; OVERLAPPED *lpov = &(lpovr->ov);
DWORD cbQueue;
BG_CHK(lpovr->dwcb<=OVBUFSIZE); pTG->Comm.comstat.cbOutQue += lpovr->dwcb;
GetCommErrorNT( pTG, (HANDLE) pTG->Comm.nCid, &err, &(pTG->Comm.comstat));
if(err) {
(MyDebugPrint(pTG, LOG_ERR, "ov_write GetCommError failed \n") ); D_GotError(pTG, pTG->Comm.nCid, err, &(pTG->Comm.comstat)); }
cbQueue = pTG->Comm.comstat.cbOutQue;
OUTMON(pTG, lpovr->rgby, (USHORT)lpovr->dwcb); { BEFORECALL; INTERCALL("Write");
( MyDebugPrint(pTG, LOG_ALL, "Before WriteFile lpb=%x, cb=%d lpovr=%lx at %ld \n", lpovr->rgby, lpovr->dwcb, lpovr, GetTickCount() ) );
if (!(fRet = WriteFile((HANDLE)pTG->Comm.nCid, lpovr->rgby, lpovr->dwcb, lpdwcbWrote, lpov))) { dw=GetLastError(); } AFTERCALL("Write",*lpdwcbWrote);
GetCommErrorNT( pTG, (HANDLE) pTG->Comm.nCid, &err, &(pTG->Comm.comstat));
if(err) { (MyDebugPrint(pTG, LOG_ERR, "ov_write GetCommError failed \n") ); D_GotError(pTG, pTG->Comm.nCid, err, &(pTG->Comm.comstat)); }
(MyDebugPrint(pTG, LOG_ALL, "Queue before=%lu; after = %lu. n= %lu, *pn=%lu\r\n", (unsigned long) cbQueue, (unsigned long) (pTG->Comm.comstat.cbOutQue), (unsigned long) lpovr->dwcb, (unsigned long) *lpdwcbWrote));
} if (fRet) { // Write operation completed
(MyDebugPrint(pTG, LOG_ALL, "WARNING: WriteFile returned w/o wait %ld\n", GetTickCount() ) );
OVL_CLEAR( lpov); lpovr->dwcb=0; ov_unget(pTG, lpovr); lpovr=NULL; } else { if (dw==ERROR_IO_PENDING) { (MyDebugPrint(pTG, LOG_ALL, "WriteFile returned PENDING at %ld\n", GetTickCount() )); *lpdwcbWrote = lpovr->dwcb; // We set *pn to n on success else 0.
lpovr->eState=eIO_PENDING; } else { (MyDebugPrint(pTG, LOG_ERR, "WriteFile returns error 0x%lx", (unsigned long) dw)); OVL_CLEAR(lpov); lpovr->dwcb=0; ov_unget(pTG, lpovr); lpovr=NULL; goto error; } } }
BG_CHK(!lpovr || lpovr->eState==eIO_PENDING); return TRUE;
error:
BG_CHK(!lpovr); return FALSE;}
BOOL ov_drain(PThrdGlbl pTG, BOOL fLongTO){ BOOL fRet = TRUE; UINT u = pTG->Comm.covAlloced;
while(u--) { OVREC *lpovr = pTG->Comm.rgovr+pTG->Comm.uovFirst; OVERLAPPED *lpov = &(lpovr->ov);
if (lpovr->eState==eIO_PENDING) { if (!iov_flush(pTG, lpovr, fLongTO)) fRet=FALSE; BG_CHK(lpovr->eState==eALLOC); lpovr->eState=eFREE; BG_CHK(pTG->Comm.covAlloced); pTG->Comm.covAlloced--; pTG->Comm.uovFirst = (pTG->Comm.uovFirst+1) % NUM_OVS; } else { // Only the newest (last) structure can be still in the
// allocated state.
BG_CHK(lpovr->eState==eALLOC && !u); BG_CHK(pTG->Comm.lpovrCur == lpovr); // Ugly check
(MyDebugPrint(pTG, LOG_ERR, "<<WARNING>> ov_drain:" " called when alloc'd structure pending\r\n"));
}
}
if (!pTG->Comm.covAlloced) pTG->Comm.uovFirst=pTG->Comm.uovLast=0; else { BG_CHK( pTG->Comm.covAlloced==1 && pTG->Comm.uovFirst==pTG->Comm.uovLast && pTG->Comm.uovFirst<NUM_OVS && pTG->Comm.rgovr[pTG->Comm.uovFirst].eState==eALLOC); }
return fRet;}
BOOL ov_init(PThrdGlbl pTG){ UINT u; OVREC *lpovr = pTG->Comm.rgovr;
// init overlapped structures, including creating events...
if (pTG->Comm.fovInited) { (MyDebugPrint(pTG, LOG_ERR, "<<ERROR>> ov_init: we're *already* inited.\r\n>>", (unsigned long) (pTG->Comm.covAlloced))); BG_CHK(FALSE); ov_deinit(pTG); }
BG_CHK(!pTG->Comm.fovInited && !pTG->Comm.covAlloced);
for (u=0;u<NUM_OVS;u++,lpovr++) { OVERLAPPED *lpov = &(lpovr->ov); BG_CHK(lpovr->eState==eDEINIT); BG_CHK(!(lpovr->dwcb)); _fmemset(lpov, 0, sizeof(OVERLAPPED)); lpov->hEvent = CreateEvent(NULL, TRUE, FALSE, NULL); if (lpov->hEvent==NULL) { (MyDebugPrint(pTG, LOG_ERR, "<<ERROR>> ov_init: couldn't create event #%lu\r\n", (unsigned long) u)); goto failure; } lpovr->eState=eFREE; lpovr->dwcb=0; }
pTG->Comm.fovInited=TRUE;
return TRUE;
failure: BG_CHK(!pTG->Comm.fovInited); while (u--) {--lpovr; CloseHandle(lpovr->ov.hEvent); lpovr->eState=eDEINIT;} return FALSE;
}
BOOL ov_deinit(PThrdGlbl pTG){ UINT u=NUM_OVS; OVREC *lpovr = pTG->Comm.rgovr;
if (!pTG->Comm.fovInited) { (MyDebugPrint(pTG, LOG_ERR, "<<WARNING>> ov_deinit: Already deinited.\r\n")); goto end; }
//
// if handoff ==> dont flush
//
if (pTG->Comm.fEnableHandoff && pTG->Comm.fDataCall) { goto lNext; }
// deinit overlapped structures, including freeing events...
if (pTG->Comm.covAlloced) { DWORD dw; (MyDebugPrint(pTG, LOG_ERR, "<<WARNING>> ov_deinit: %lu IO's pending.\r\n", (unsigned long) pTG->Comm.covAlloced)); if (pTG->Comm.lpovrCur) {ov_write(pTG, pTG->Comm.lpovrCur,&dw); pTG->Comm.lpovrCur=NULL;} ov_drain(pTG, FALSE); } BG_CHK(!pTG->Comm.covAlloced);
lNext:
while (u--) { BG_CHK(!(lpovr->dwcb)); BG_CHK(lpovr->eState==eFREE); lpovr->eState=eDEINIT; if (lpovr->ov.hEvent) CloseHandle(lpovr->ov.hEvent); _fmemset(&(lpovr->ov), 0, sizeof(lpovr->ov)); lpovr++; }
pTG->Comm.fovInited=FALSE;
end: return TRUE;}
BOOL iov_flush(PThrdGlbl pTG, OVREC *lpovr, BOOL fLongTO)// On return, state of lpovr is *always* eALLOC, but
// it returns FALSE if there was a comm error while trying
// to flush (i.e. drain) the buffer.
// If we timeout with the I/O operation still pending, we purge
// the output buffer and abort all pending write operations.
{ DWORD dwcbPrev; DWORD dwStart = GetTickCount(); BOOL fRet=FALSE; DWORD dw; int err;
(MyDebugPrint(pTG, LOG_ALL, "In iov_flush fLongTo=%d lpovr=%lx at %ld \n", fLongTO, lpovr, GetTickCount() ) );
BG_CHK(lpovr->eState==eIO_PENDING);
if (pTG->Comm.nCid<0) {lpovr->eState=eALLOC; goto end;}
// We call
// WaitForSingleObject multiple times ... basically
// the same logic as the code in the old FComDirectWrite...
// fLongTO is TRUE except when initing
// the modem (see comments for FComDrain).
BG_CHK(lpovr->ov.hEvent); GetCommErrorNT( pTG, (HANDLE) pTG->Comm.nCid, &err, &(pTG->Comm.comstat)); DEBUGSTMT(if(err) D_GotError(pTG, pTG->Comm.nCid, err, &(pTG->Comm.comstat));); dwcbPrev = pTG->Comm.comstat.cbOutQue;
while(WaitForSingleObject(lpovr->ov.hEvent, fLongTO? LONG_DRAINTIMEOUT : SHORT_DRAINTIMEOUT)==WAIT_TIMEOUT) { BOOL fStuckOnce=FALSE;
(MyDebugPrint(pTG, LOG_ALL, "After WaitForSingleObject TIMEOUT %ld \n", GetTickCount() ) );
GetCommErrorNT( pTG, (HANDLE) pTG->Comm.nCid, &err, &(pTG->Comm.comstat)); DEBUGSTMT(if(err) D_GotError(pTG, pTG->Comm.nCid, err, &(pTG->Comm.comstat)););
// Timed out -- check if any progress
if (dwcbPrev == pTG->Comm.comstat.cbOutQue) {
(MyDebugPrint(pTG, LOG_ALL, "WARNING: No progress %d %ld \n", dwcbPrev, GetTickCount() ) );
// No progress... If not in XOFFHold, we break....
if(!FComInXOFFHold(pTG)) { if(fStuckOnce) { (MyDebugPrint(pTG, LOG_ERR, "<<ERROR>> iov_flush:: No Progress -- OutQ still %d at %lu\r\n", (int)pTG->Comm.comstat.cbOutQue, GetTickCount())); iModemSetError(pTG, MODEMERR_TIMEOUT, 0, MODEMERRFLAGS_TRANSIENT); goto done; } else fStuckOnce=TRUE; } } else { // Some progress...
dwcbPrev= pTG->Comm.comstat.cbOutQue; fStuckOnce=FALSE; }
// Independant deadcom timeout... I don't want
// to use TO because of the 16bit limitation.
{ DWORD dwNow = GetTickCount(); DWORD dwDelta = (dwNow>dwStart) ? (dwNow-dwStart) : (0xFFFFFFFFL-dwStart) + dwNow; if (dwDelta > (unsigned long) ((fLongTO)?LONG_DEADCOMMTIMEOUT:SHORT_DEADCOMMTIMEOUT)) { (MyDebugPrint(pTG, LOG_ERR, "<<ERROR>> Drain:: Deadman Timer -- OutQ still %d at %lu\r\n", (int) pTG->Comm.comstat.cbOutQue, GetTickCount())); goto end; } } }
done:
(MyDebugPrint(pTG, LOG_ALL, "Before GetOverlappedResult %ld \n", GetTickCount() ) );
if (GetOverlappedResult((HANDLE)pTG->Comm.nCid, &(lpovr->ov), &dw, FALSE)) {
fRet=TRUE; } else { dw = GetLastError(); (MyDebugPrint(pTG, LOG_ERR, "<<ERROR>> iov_flush:GetOverlappedResult returns error 0x%lx\r\n", (unsigned long) dw)); if (dw==ERROR_IO_INCOMPLETE) { // IO operation still pending, but we *have* to
// reuse this buffer -- what should we do?!-
// purge the output buffer and abort all pending
// write operations on it..
(MyDebugPrint(pTG, LOG_ERR, "ERROR: Incomplete at %ld \n", GetTickCount() ) ); PurgeComm((HANDLE)pTG->Comm.nCid, PURGE_TXABORT); } fRet=FALSE; } OVL_CLEAR( &(lpovr->ov)); lpovr->eState=eALLOC; lpovr->dwcb=0;
end: return fRet;}
void WINAPI FComOverlappedIO(PThrdGlbl pTG, BOOL fBegin){ (MyDebugPrint(pTG, LOG_ALL, "Turning %s OVERLAPPED IO\r\n", (fBegin) ? "ON" : "OFF")); pTG->Comm.fDoOverlapped=fBegin;}
#ifdef DEBUG
void d_TimeStamp(LPSTR lpsz, DWORD dwID){ (MyDebugPrint(0, LOG_ERR, "<<TS>> %s(%lu):%lu\r\n", (LPSTR) lpsz, (unsigned long) dwID, (unsigned long) GetTickCount()));}#endif
voidGetCommErrorNT( PThrdGlbl pTG, HANDLE h, int * pn, LPCOMSTAT pstat)
{ if (!ClearCommError( h, pn, pstat) ) { MyDebugPrint(pTG, LOG_ERR, "ERROR ClearComError(0x%lx) FAILS. Returns 0x%lu\n", h, GetLastError() ); *(pn) = MYGETCOMMERROR_FAILED; }
}
voidClearCommCache( PThrdGlbl pTG )
{ pTG->CommCache.dwCurrentSize = 0; pTG->CommCache.dwOffset = 0;
}
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