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/*************************************************************************
hdlc.h
Contains stuff pertaining to sending and recieving HDLC frames that are defined in the T30 spec.*************************************************************************/
// On PCs we should pause before ALL frames _except_ CFR & FTT (because
// those are too time critical). In IFAX we look for silence always.
// This is handled in HDLC.C
// On PCs we use TwiddleThumbs() (FTS and FRS are dangerous)
// In IFAX we must use RecvSilence (safe in IFAX) to avoid collisions
// This is handled inside the Modem driver. AWT30 always call RecvSilence
// (in HDLC.C), and the Class1 modem driver uses TwiddleThumbs()
// not FRS or FTS, while teh IFAX driver looks for real silence
// In WFW don't pause before CFR/FTT. Delay may get too long!!
#define SendCFR(pTG) (SendSingleFrame(pTG,ifrCFR,0,0,1))
#define SendFTT(pTG) (SendSingleFrame(pTG,ifrFTT,0,0,1))
// must pause before MCF/RTN always
#define SendMCF(pTG) (SendSingleFrame(pTG,ifrMCF,0,0,1))
#define SendRTN(pTG) (SendSingleFrame(pTG,ifrRTN,0,0,1))
/*** never send RTP
#define SendRTP() (SendSingleFrame(ifrRTP,0,0))
***/
// no harm in pausing before DCN.
#define SendDCN(pTG) (SendSingleFrame(pTG,ifrDCN,0,0,1))
#ifdef USECRP
# define SendCRP(pTG) (SendSingleFrame(pTG,ifrCRP,0,0,1))
#else
# define SendCRP(pTG) (0)
#endif
// we've eliminated the post-page pause, so we need to pause before these
// frames. In any case, that's all handled inside the modem driver.
// We make a single call to ModemRecSilence()
#define SendEOM(pTG) (SendSingleFrame(pTG,ifrEOM,0,0,1))
#define SendMPS(pTG) (SendSingleFrame(pTG,ifrMPS,0,0,1))
#define SendEOP(pTG) (SendSingleFrame(pTG,ifrEOP,0,0,1))
#define SendPRI_EOM(pTG) (SendSingleFrame(pTG,ifrPRI_EOM,0,0,1))
#define SendPRI_MPS(pTG) (SendSingleFrame(pTG,ifrPRI_MPS,0,0,1))
#define SendPRI_EOP(pTG) (SendSingleFrame(pTG,ifrPRI_EOP,0,0,1))
#define SendPIP(pTG) (SendSingleFrame(pTG,ifrPIP,0,0.1))
#define SendPIN(pTG) (SendSingleFrame(pTG,ifrPIN,0,0,1))
// do we need a pause before RR/CTC/ERR/CTR etc?
// in RR & CTC we have all teh time in the world, so must pause
// ERR & CTR I dunno, so I'm pausing anyway
#define SendRR(pTG) (SendSingleFrame(pTG,ifrRR,0,0,1))
#define SendCTC(pTG,fif) (SendSingleFrame(pTG,ifrCTC,fif,2,1))
#define SendERR(pTG) (SendSingleFrame(pTG,ifrERR,0,0,1))
#define SendCTR(pTG) (SendSingleFrame(pTG,ifrCTR,0,0,1))
// PPR/RNR sent in same logical spot as MCF so use delay
#define SendPPR(pTG,fif) (SendSingleFrame(pTG,ifrPPR,fif,32,1))
#define SendRNR(pTG) (SendSingleFrame(pTG,ifrRNR,0,0,1))
// add this...
#define SendEOR_EOP(pTG) (SendSingleFrame(pTG,ifrEOR_EOP, 0, 0, 1))
#define TEXTBASED
typedef struct { BYTE bFCF1; BYTE bFCF2; BYTE fInsertDISBit; BYTE wFIFLength; // required FIF length, 0 if none, FF if variable
char* szName;} FRAME;
typedef FRAME TEXTBASED *CBPFRAME;
// CBPFRAME is a based pointer to a FRAME structure, with the base as
// the current Code segment. It will only be used to access
// the frame table which is a CODESEG based constant table.
// This is everything you never wanted to know about T30 frames....
#define ifrMAX 48
extern FRAME TEXTBASED rgFrameInfo[ifrMAX];
/****************** begin prototypes from hdlc.c *****************/BOOL SendSingleFrame(PThrdGlbl pTG, IFR ifr, LPB lpbFIF, USHORT uFIFLen, BOOL fSleep);BOOL SendManyFrames(PThrdGlbl pTG, LPLPFR lplpfr, USHORT uNumFrames);BOOL SendZeros(PThrdGlbl pTG, USHORT uCount, BOOL fFinal);BOOL SendTCF(PThrdGlbl pTG);BOOL SendRTC(PThrdGlbl pTG, BOOL);SWORD GetTCF(PThrdGlbl pTG);/***************** end of prototypes from hdlc.c *****************/
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