v3mt_acc.c

wm PNE 3.3 source code, running at more than vxworks6.x version.

	 we need to deinstall it, call the backout routine,
	 and cleanup the state.

	 Expects the pointer to point to a VB_T

PARAMETERS: 
	ptr_t   A pointer to the vb that points to the group
		that we were going to create, cast as a ptr_t

RETURNS: Nothing
****************************************************************************/

static void
  grouptable_create_cleanup(ptr_t groupptr)
{
SNMP_GROUP_T *group;

group = (SNMP_GROUP_T *)(((VB_T *)groupptr)->vb_priv);
SNMP_V3_GROUP_CREATE_BACKOUT(0, group);
SNMP_Group_Deinstall(group);
SNMP_Group_Destroy(group);
}

/****************************************************************************
NAME: grouptable_update_cleanup

PURPOSE: Cleanup after a group update test succeeded but some
         other test failed.  As this is an update the state
	 pointer points to a structure that isn't installed.
	 The next pointer of that structure points to the
	 installed copy.  We call the backout routine and
	 cleanup the state.

PARAMETERS: 
	ptr_t   A pointer to the vb that points to the group
	        that contained the update information,
		cast as a ptr_t

RETURNS: Nothing
****************************************************************************/

static void
  grouptable_update_cleanup(ptr_t groupptr)
{
SNMP_GROUP_T *group;

group = (SNMP_GROUP_T *)(((VB_T *)groupptr)->vb_priv);
SNMP_V3_GROUP_UPDATE_BACKOUT(group->next, group);
SNMP_Group_Destroy(group);
}


/****************************************************************************
NAME:  grouptable_destory_undo

PURPOSE:  This routine attempts to undo a previous destory set.  It expects
	  the old information to be pointed to by vb_priv and tries to
	  reinstall it.  If we can't reinstall the group we leave
	  the cleanup routine alone in order to get the FINISHED
	  macro to run.

PARAMETERS:
	OIDC_T		Last component of the object id leading to 
			the leaf node in the MIB.  This is usually
			the identifier for the particular attribute
			in the table.
	int		Number of components in the unused part of the
			object identifier
	OIDC_T	   *	Unused part of the object identifier
	SNMP_PKT_T *	SNMP packet currently being processsed.
	VB_T	   *	Variable being processed.

RETURNS:  void
****************************************************************************/
/*ARGSUSED*/
static void
  grouptable_destroy_undo(OIDC_T	 last_match,
			  int		 tcount,
			  OIDC_T	*tlist,
			  SNMP_PKT_T 	*pktp,
			  VB_T		*vbp)
{
SNMP_GROUP_T *group;
ALENGTH_T namelen = ETC_ACCESS_GROUP_MAX;
bits8_t name[ETC_ACCESS_GROUP_MAX];

/* reaquire the name */
 (void) oid_to_string(tcount - 1, tlist + 1, &namelen, name, 0);

/* assume things will go well and mark the vbp as done */
undoproc_good(pktp, vbp);

/* find the state block we saved and then reset the vb_priv info
   so we don't have any accidents later */
group        = (SNMP_GROUP_T *)vbp->vb_priv;
vbp->vb_priv = 0;

if (SNMP_Group_Install(group, (sbits32_t)tlist[0], name, namelen) == 0) {
#if defined(SNMP_V3_GROUP_DESTROY_UNDO) 
    if (SNMP_V3_GROUP_DESTROY_UNDO(pktp, vbp, 0, group) == 0) {
        vbp->vb_free_priv = 0;
        return;
        }
    else 
        SNMP_Group_Deinstall(group);
#else
    vbp->vb_free_priv = 0;
    return;
#endif
    }

SNMP_Group_Destroy(group);
undoproc_error(pktp, vbp, UNDO_FAILED);
return;
}

/****************************************************************************
NAME:  grouptable_create_undo

PURPOSE:  This routine attempts to undo a previous create set.  It expects
	  the new information to be pointed to by vb_priv and tries
	  to deinstall and destroy the entry.

PARAMETERS:
	OIDC_T		Last component of the object id leading to 
			the leaf node in the MIB.  This is usually
			the identifier for the particular attribute
			in the table.
	int		Number of components in the unused part of the
			object identifier
	OIDC_T	   *	Unused part of the object identifier
	SNMP_PKT_T *	SNMP packet currently being processsed.
	VB_T	   *	Variable being processed.

RETURNS:  void
****************************************************************************/
/*ARGSUSED*/
static void
  grouptable_create_undo(OIDC_T	 	 last_match,
			 int		 tcount,
			 OIDC_T		*tlist,
			 SNMP_PKT_T 	*pktp,
			 VB_T		*vbp)
{
SNMP_GROUP_T *group;

/* assume things will go well */
undoproc_good(pktp, vbp);

/* find the state block we saved and then reset the vb_priv info
   so we don't have any accidents later */
group = (SNMP_GROUP_T *)vbp->vb_priv;
vbp->vb_priv	  = 0;
vbp->vb_free_priv = 0;

#if defined(SNMP_V3_GROUP_CREATE_UNDO)
if (SNMP_V3_GROUP_CREATE_UNDO(pktp, vbp, group, 0)) {
    undoproc_error(pktp, vbp, UNDO_FAILED);
    return;
    }
#endif

SNMP_Group_Deinstall(group);
SNMP_Group_Destroy(group);
return;
}

/****************************************************************************
NAME:  grouptable_update_undo

PURPOSE:  This routine attempts to undo a previous update set.  It expects
	  the struct pointed to by vb_priv to contain the old information
	  and a pointer to the new (installed) struct.

PARAMETERS:
	OIDC_T		Last component of the object id leading to 
			the leaf node in the MIB.  This is usually
			the identifier for the particular attribute
			in the table.
	int		Number of components in the unused part of the
			object identifier
	OIDC_T	   *	Unused part of the object identifier
	SNMP_PKT_T *	SNMP packet currently being processsed.
	VB_T	   *	Variable being processed.

RETURNS:  void
****************************************************************************/
/*ARGSUSED*/
static void
  grouptable_update_undo(OIDC_T		 last_match,
			 int		 tcount,
			 OIDC_T		*tlist,
			 SNMP_PKT_T 	*pktp,
			 VB_T		*vbp)
{
SNMP_GROUP_T *curgroup, *savgroup;

/* assume things will go well */
undoproc_good(pktp, vbp);

/* find the state block we saved and then reset the vb_priv info
   so we don't have any accidents later */
savgroup = (SNMP_GROUP_T *)vbp->vb_priv;
vbp->vb_priv	  = 0;
vbp->vb_free_priv = 0;

curgroup = savgroup->next;

#if defined(SNMP_V3_GROUP_UPDATE_UNDO)
if (SNMP_V3_GROUP_UPDATE_UNDO(pktp, vbp, curgroup, savgroup)) {
    /* we had an undo failure indicate that to our
       caller and get rid of the saved group */
    undoproc_error(pktp, vbp, UNDO_FAILED);
    SNMP_Group_Destroy(savgroup);
    return;
    }
#endif

/* swap the info from saved group back into current group and then free
   the saved block.  */

SNMP_Group_Set_Status(curgroup, SNMP_Group_Get_Status(savgroup));
SNMP_Group_Set_Storage(curgroup, SNMP_Group_Get_Storage(savgroup));

/* We only need to move stuff if the names are different */
if (EBufferStart(&savgroup->grp_name) != EBufferStart(&curgroup->grp_name)) {
    EBufferClean(&curgroup->grp_name);
    MEMCPY(&curgroup->grp_name, &savgroup->grp_name, sizeof(EBUFFER_T));
    EBufferInitialize(&savgroup->grp_name);
    }

SNMP_Group_Destroy(savgroup);
return;
}

/****************************************************************************
NAME: grouptable_set_cleanup

PURPOSE: Free the saved group and indicate that we are finished.

PARAMETERS: 
	ptr_t   A pointer to the vb that points to the group
	        that contained the update information,
		cast as a ptr_t

RETURNS: Nothing
****************************************************************************/

static void
  grouptable_set_cleanup(ptr_t groupptr)
{
if (((VB_T *)groupptr)->vb_priv) {
    if (((VB_T *)groupptr)->undoproc == grouptable_create_undo)
        ((VB_T *)groupptr)->vb_priv = 0;
    else
        SNMP_Group_Destroy(((VB_T *)groupptr)->vb_priv);
    }

SNMP_V3_GROUP_FINISHED();
}

/****************************************************************************
NAME:  grouptable_test

PURPOSE:  This routine collects all of the var binds that want to be set
	  in a row and does value and consistency checking on those
	  varbinds before trying to allocate any space. 

PARAMETERS:
	OIDC_T		Last component of the object id leading to 
			the leaf node in the MIB.  This is usually
			the identifier for the particular attribute
			in the table.
	int		Number of components in the unused part of the
			object identifier
	OIDC_T	   *	Unused part of the object identifier
	SNMP_PKT_T *	SNMP packet currently being processsed.
	VB_T	   *	Variable being processed.

RETURNS:  void
****************************************************************************/
/*ARGSUSED*/
void
  grouptable_test(OIDC_T	 last_match,
		  int		 tcount,
		  OIDC_T	*tlist,
		  SNMP_PKT_T 	*pktp,
		  VB_T		*vbp)
{
SNMP_GROUP_T *grp, tempgrp, *newgrp;
sbits32_t value, ptret;
int cago = 0, create_row = 0, grp_changed = 0;
ALENGTH_T nlen = 0, namelen = ETC_ACCESS_GROUP_MAX;
VB_T *tvbp, *rs_vbp = 0, *vg_vbp = 0;
bits8_t name[ETC_ACCESS_GROUP_MAX];

/* get the list of var binds that may go into this structure
   then mark all the vbs except the first one as having been
   tested, set and done.  This means that vbp is taking
   responsibility for all of the other vbs in the row.  Then
   mark vbp as haing it's test started & done so we don't
   have to worry about it later.  We can do this because
   the routine will run to completion */
group_by_getproc_and_instance(pktp, vbp, tcount, tlist);
for(tvbp = vbp->vb_link; tvbp; tvbp = tvbp->vb_link)
    setproc_all_bits(pktp, tvbp);
testproc_good(pktp, vbp);

/* The index will be of the form <model> <len> <name>
   first we see if the name will work then we try and find the group */
if ((tcount < 3) ||
    (tlist[0] == 0) ||
    (tlist[0] > 0x80000000L) ||
    (tlist[1] < 1) ||
    (oid_to_string(tcount - 1, tlist + 1, &namelen, name, 0)) ||
    ((bits32_t)namelen != (bits32_t)(tcount - 2))) {
    testproc_error(pktp, vbp, NO_CREATION);
    return;
    }

grp = SNMP_Group_Lookup((sbits32_t)tlist[0], name, namelen);

/*sar*/ /* need to update this comment */
/* Note that the check for status is simpler than the general case as 
   this table has few objects and all but status have defvals.  This 
   means that several conditions can't occur.  So create and go is always
   acceptable and is almost the same as create and wait, active and not in
   service are also similiar. */

/* is the leaf writable, (if it's read only it isn't writable) */
if (grp != 0) {
    if (SNMP_Group_Get_Storage(grp) == ETC_STO_RONLY) {
	testproc_error(pktp, vbp, NOT_WRITABLE);      
	return;
	}

    MEMCPY(&tempgrp, grp, sizeof(SNMP_GROUP_T));
    }
else {
    SNMP_Group_Set_Defaults(&tempgrp);
    create_row = 1;
    }
    
for (tvbp = vbp; tvbp; tvbp = tvbp->vb_link) {
    switch (tvbp->vb_ml.ml_last_match) {
        case LM_groupName:
	    nlen = EBufferUsed(&tvbp->value_u.v_string);
	    if ((nlen == 0) || (nlen > ETC_ACCESS_GROUP_MAX)) {
		testproc_error(pktp, tvbp, WRONG_LENGTH);
		return;
		}
	    EBufferPreLoad(BFL_IS_STATIC, &tempgrp.grp_name,
			   EBufferStart(&tvbp->value_u.v_string), nlen);
            vg_vbp = tvbp;
	    break;
	case LM_groupStorage:
	    value = tvbp->value_u.v_number;
 	    if ((value < ETC_STO_OTHER)  ||
		(value > ETC_STO_RONLY) ||
                ((grp != 0) && (value > ETC_STO_NONVOL)) ||
		(SNMP_Group_Get_Storage(&tempgrp) > ETC_STO_NONVOL)) {
		testproc_error(pktp, tvbp, WRONG_VALUE);
		return;
		}
	    SNMP_Group_Set_Storage(&tempgrp, (int)value);
	    break;

	case LM_groupStatus:
	    value = tvbp->value_u.v_number;
	    switch (value) {
		case ETC_RS_ACTIVE:
		case ETC_RS_NIS:
		    if (create_row) {
			testproc_error(pktp, tvbp, INCONSISTENT_VALUE);
			return;
			}
		    break;
		case ETC_RS_CAGO:
		    if (create_row == 0) {
			testproc_error(pktp, tvbp, INCONSISTENT_VALUE);
			return;
			}
		    value = ETC_RS_ACTIVE;
		    cago = 1;
		    break;
		case ETC_RS_CAWAIT:
		    if (create_row == 0) {
			testproc_error(pktp, tvbp, INCONSISTENT_VALUE);
			return;
			}
		    value = ETC_RS_NREADY;
		    break;
		case ETC_RS_DESTROY:
                    if (SNMP_Group_Get_Storage(&tempgrp) >= ETC_STO_PERM) {
                        testproc_error(pktp, tvbp, WRONG_VALUE);
                        return;
                        }
		    break;
		default:
		    testproc_error(pktp, tvbp, WRONG_VALUE);
		    return;
	        }

	    if (SNMP_Group_Get_Status(&tempgrp) != ETC_RS_DESTROY)
	        SNMP_Group_Set_Status(&tempgrp, (int)value);
            rs_vbp = tvbp;
	    break;
	}
    }