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    Length: 3505 (0xdb1)
    Types: TextFile
    Names: »ssapresync1.c«

└─⟦3d0c2be1b⟧ Bits:30001254 ISODE-5.0 Tape
    └─⟦eba4602b1⟧ »./isode-5.0.tar.Z« 
        └─⟦d3ac74d73⟧ 
            └─⟦this⟧ »isode-5.0/ssap/ssapresync1.c« 

TextFile

/* ssapresync.c - SPM: initiate resyncs */

#ifndef	lint
static char *rcsid = "$Header: /f/osi/ssap/RCS/ssapresync1.c,v 6.0 89/03/18 23:44:02 mrose Rel $";
#endif

/* 
 * $Header: /f/osi/ssap/RCS/ssapresync1.c,v 6.0 89/03/18 23:44:02 mrose Rel $
 *
 *
 * $Log:	ssapresync1.c,v $
 * Revision 6.0  89/03/18  23:44:02  mrose
 * Release 5.0
 * 
 */

/*
 *				  NOTICE
 *
 *    Acquisition, use, and distribution of this module and related
 *    materials are subject to the restrictions of a license agreement.
 *    Consult the Preface in the User's Manual for the full terms of
 *    this agreement.
 *
 */


/* LINTLIBRARY */

#include <stdio.h>
#include <signal.h>
#include "spkt.h"

/* \f

   S-RESYNCHRONIZE.REQUEST */

#define	dotoken(requires,shift,bit,type) \
{ \
    if (sb -> sb_requirements & requires) \
	switch (settings & (ST_MASK << shift)) { \
	    case ST_INIT_VALUE << shift: \
	    case ST_RESP_VALUE << shift: \
	    case ST_CALL_VALUE << shift: \
		break; \
 \
	    default: \
		return ssaplose (si, SC_PARAMETER, NULLCP, \
			"improper choice of %s token setting",type); \
	} \
}

/* \f

 */

int	SReSyncRequest (sd, type, ssn, settings, data, cc, si)
int	sd;
int	type,
	settings;
long	ssn;
char   *data;
int	cc;
struct SSAPindication *si;
{
    SBV	    smask;
    int     result;
    register struct ssapblk *sb;

    switch (type) {
	case SYNC_RESTART: 
	    break;

	case SYNC_ABANDON: 
	    if (ssn != SERIAL_NONE)
		return ssaplose (si, SC_PARAMETER, NULLCP,
			"serial number inappropriate");
	    break;

	case SYNC_SET: 
	    if (SERIAL_MIN > ssn || ssn > SERIAL_MAX + 1)
		return ssaplose (si, SC_PARAMETER, NULLCP,
			"invalid serial number");
	    break;

	default: 
	    return ssaplose (si, SC_PARAMETER, NULLCP,
		    "improper choice of type setting");
    }
    missingP (si);

    smask = sigioblock ();

    ssapRsig (sb, sd);
    toomuchP (sb, data, cc, SN_SIZE, "resync");

    result = SReSyncRequestAux (sb, type, ssn, settings, data, cc, si);

    (void) sigiomask (smask);

    return result;
}

/* \f

 */

static int  SReSyncRequestAux (sb, type, ssn, settings, data, cc, si)
register struct ssapblk *sb;
int	type,
	settings;
long	ssn;
char   *data;
int	cc;
register struct SSAPindication *si;
{
    int     result;

    if (!(sb -> sb_requirements & SR_RESYNC))
	return ssaplose (si, SC_OPERATION, NULLCP,
		"resynchronize service unavailable");

    if ((sb -> sb_requirements & SR_ACTIVITY)
	    && !(sb -> sb_flags & SB_Vact))
	return ssaplose (si, SC_OPERATION, NULLCP,
		"no activity in progress");

    if ((sb -> sb_flags & SB_RA)
	    && SDoCollideAux (sb -> sb_flags & SB_INIT ? 1 : 0, type, ssn,
		    sb -> sb_rs, sb -> sb_rsn) == NOTOK)
	return ssaplose (si, SC_OPERATION, NULLCP,
		"resync in progress takes precedence");

    switch (type) {
	case SYNC_RESTART: 
	    if (sb -> sb_V_M < ssn || ssn < sb -> sb_V_R)
		return ssaplose (si, SC_OPERATION, NULLCP,
			"bad choice for resync ssn, should be in [%d..%d]",
			sb -> sb_V_R, sb -> sb_V_M);
	    break;

	case SYNC_ABANDON: 
	    ssn = sb -> sb_V_M;
	    break;

	case SYNC_SET: 
	    break;
    }

    dotokens ();

    if ((result = SWriteRequestAux (sb, SPDU_RS, data, cc, type, ssn,
		settings, NULLSD, NULLSD, NULLSR, si)) == NOTOK)
	freesblk (sb);
    else {
	sb -> sb_flags |= SB_RS, sb -> sb_flags &= ~(SB_RA | SB_EDACK | SB_ERACK);
	sb -> sb_rs = type;
	sb -> sb_rsn = ssn;
	sb -> sb_rsettings = sb -> sb_requirements & SR_TOKENS ? settings : 0;
    }

    return result;
}

#undef	dotoken