ifxtable.c

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        rowreq_ctx->data.ifAlias_len * sizeof(rowreq_ctx->data.ifAlias[0]);
    memcpy((*ifAlias_val_ptr_ptr), rowreq_ctx->data.ifAlias,
           rowreq_ctx->data.ifAlias_len *
           sizeof(rowreq_ctx->data.ifAlias[0]));

    return MFD_SUCCESS;
}                               /* ifAlias_get */

/*---------------------------------------------------------------------
 * IF-MIB::ifXEntry.ifCounterDiscontinuityTime
 * ifCounterDiscontinuityTime is subid 19 of ifXEntry.
 * Its status is Current, and its access level is ReadOnly.
 * OID: .1.3.6.1.2.1.31.1.1.1.19
 * Description:
The value of sysUpTime on the most recent occasion at which
            any one or more of this interface's counters suffered a
            discontinuity.  The relevant counters are the specific
            instances associated with this interface of any Counter32 or

            Counter64 object contained in the ifTable or ifXTable.  If
            no such discontinuities have occurred since the last re-
            initialization of the local management subsystem, then this
            object contains a zero value.
 *
 * Attributes:
 *   accessible 1     isscalar 0     enums  0      hasdefval 0
 *   readable   1     iscolumn 1     ranges 0      hashint   0
 *   settable   0
 *
 *
 * Its syntax is TimeStamp (based on perltype TICKS)
 * The net-snmp type is ASN_TIMETICKS. The C type decl is u_long (u_long)
 */
/**
 * Extract the current value of the ifCounterDiscontinuityTime data.
 *
 * Set a value using the data context for the row.
 *
 * @param rowreq_ctx
 *        Pointer to the row request context.
 * @param ifCounterDiscontinuityTime_val_ptr
 *        Pointer to storage for a u_long variable
 *
 * @retval MFD_SUCCESS         : success
 * @retval MFD_SKIP            : skip this node (no value for now)
 * @retval MFD_ERROR           : Any other error
 */
int
ifCounterDiscontinuityTime_get(ifXTable_rowreq_ctx * rowreq_ctx,
                               u_long * ifCounterDiscontinuityTime_val_ptr)
{
   /** we should have a non-NULL pointer */
    netsnmp_assert(NULL != ifCounterDiscontinuityTime_val_ptr);


    DEBUGMSGTL(("verbose:ifXTable:ifCounterDiscontinuityTime_get",
                "called\n"));

    netsnmp_assert(NULL != rowreq_ctx);

    /*
     * TODO:231:o: |-> Extract the current value of the ifCounterDiscontinuityTime data.
     * copy (* ifCounterDiscontinuityTime_val_ptr ) from rowreq_ctx->data
     */
    (*ifCounterDiscontinuityTime_val_ptr) =
        rowreq_ctx->data.ifCounterDiscontinuityTime;

    return MFD_SUCCESS;
}                               /* ifCounterDiscontinuityTime_get */



/** @} */
/**********************************************************************
 **********************************************************************
 ***
 *** Table ifXTable
 ***
 **********************************************************************
 **********************************************************************/
/*
 * IF-MIB::ifXTable is subid 1 of ifMIBObjects.
 * Its status is Current.
 * OID: .1.3.6.1.2.1.31.1.1, length: 9
 */
    /*
     * NOTE: if you update this chart, please update the versions in
     *       local/mib2c-conf.d/parent-set.m2i
     *       agent/mibgroup/helpers/baby_steps.c
     * while you're at it.
     */
    /*
     ***********************************************************************
     * Baby Steps Flow Chart (2004.06.05)                                  *
     *                                                                     *
     * +--------------+    +================+    U = unconditional path    *
     * |optional state|    ||required state||    S = path for success      *
     * +--------------+    +================+    E = path for error        *
     ***********************************************************************
     *
     *                        +--------------+
     *                        |     pre      |
     *                        |   request    |
     *                        +--------------+
     *                               | U
     *                        +==============+
     *       +----------------||  object    ||
     *       |              E ||  lookup    ||
     *       |                +==============+
     *       |                       | S
     *       |                +==============+
     *       |              E ||   check    ||
     *       |<---------------||   values   ||
     *       |                +==============+
     *       |                       | S
     *       |                +==============+
     *       |       +<-------||   undo     ||
     *       |       |      E ||   setup    ||
     *       |       |        +==============+
     *       |       |               | S
     *       |       |        +==============+
     *       |       |        ||    set     ||-------------------------->+
     *       |       |        ||   value    || E                         |
     *       |       |        +==============+                           |
     *       |       |               | S                                 |
     *       |       |        +--------------+                           |
     *       |       |        |    check     |-------------------------->|
     *       |       |        |  consistency | E                         |
     *       |       |        +--------------+                           |
     *       |       |               | S                                 |
     *       |       |        +==============+         +==============+  |
     *       |       |        ||   commit   ||-------->||     undo   ||  |
     *       |       |        ||            || E       ||    commit  ||  |
     *       |       |        +==============+         +==============+  |
     *       |       |               | S                     U |<--------+
     *       |       |        +--------------+         +==============+
     *       |       |        | irreversible |         ||    undo    ||
     *       |       |        |    commit    |         ||     set    ||
     *       |       |        +--------------+         +==============+
     *       |       |               | U                     U |
     *       |       +-------------->|<------------------------+
     *       |                +==============+
     *       |                ||   undo     ||
     *       |                ||  cleanup   ||
     *       |                +==============+
     *       +---------------------->| U
     *                        +--------------+
     *                        |    post      |
     *                        |   request    |
     *                        +--------------+
     *
     */

/**
 * Setup up context with information needed to undo a set request.
 *
 * This function will be called before the individual node undo setup
 * functions are called. If you need to do any undo setup that is not
 * related to a specific column, you can do it here.
 *
 * Note that the undo context has been allocated with
 * ifXTable_allocate_data(), but may need extra
 * initialization similar to what you may have done in
 * ifXTable_rowreq_ctx_init().
 * Note that an individual node's undo_setup function will only be called
 * if that node is being set to a new value.
 *
 * If there is any setup specific to a particular column (e.g. allocating
 * memory for a string), you should do that setup in the node's undo_setup
 * function, so it won't be done unless it is necessary.
 *
 * @param rowreq_ctx
 *        Pointer to the table context (ifXTable_rowreq_ctx)
 *
 * @retval MFD_SUCCESS : success
 * @retval MFD_ERROR   : error. set will fail.
 */
int
ifXTable_undo_setup(ifXTable_rowreq_ctx * rowreq_ctx)
{
    int             rc = MFD_SUCCESS;

    DEBUGMSGTL(("verbose:ifXTable:ifXTable_undo_setup", "called\n"));

    /** we should have a non-NULL pointer */
    netsnmp_assert(NULL != rowreq_ctx);

    /*
     * TODO:451:M: |-> Setup ifXTable undo.
     * set up ifXTable undo information, in preparation for a set.
     * Undo storage is in (* ifCounterDiscontinuityTime_val_ptr )*
     */

    return rc;
}                               /* ifXTable_undo_setup */

/**
 * Undo a set request.
 *
 * This function will be called before the individual node undo
 * functions are called. If you need to do any undo that is not
 * related to a specific column, you can do it here.
 *
 * Note that an individual node's undo function will only be called
 * if that node is being set to a new value.
 *
 * If there is anything  specific to a particular column (e.g. releasing
 * memory for a string), you should do that setup in the node's undo
 * function, so it won't be done unless it is necessary.
 *
 * @param rowreq_ctx
 *        Pointer to the table context (ifXTable_rowreq_ctx)
 *
 * @retval MFD_SUCCESS : success
 * @retval MFD_ERROR   : error. set will fail.
 */
int
ifXTable_undo(ifXTable_rowreq_ctx * rowreq_ctx)
{
    int             rc = MFD_SUCCESS;

    DEBUGMSGTL(("verbose:ifXTable:ifXTable_undo", "called\n"));

    /** we should have a non-NULL pointer */
    netsnmp_assert(NULL != rowreq_ctx);

    /*
     * TODO:451:M: |-> ifXTable undo.
     * ifXTable undo information, in response to a failed set.
     * Undo storage is in (* ifCounterDiscontinuityTime_val_ptr )*
     */

    return rc;
}                               /* ifXTable_undo_setup */

/**
 * Cleanup up context undo information.
 *
 * This function will be called after set/commit processing. If you
 * allocated any resources in undo_setup, this is the place to release
 * those resources.
 *
 * This function is called regardless of the success or failure of the set
 * request. If you need to perform different steps for cleanup depending
 * on success or failure, you can add a flag to the rowreq_ctx.
 *
 * @param rowreq_ctx
 *        Pointer to the table context (ifXTable_rowreq_ctx)
 *
 * @retval MFD_SUCCESS : success
 * @retval MFD_ERROR   : error
 */
int
ifXTable_undo_cleanup(ifXTable_rowreq_ctx * rowreq_ctx)
{
    int             rc = MFD_SUCCESS;

    DEBUGMSGTL(("verbose:ifXTable:ifXTable_undo_cleanup", "called\n"));

    /** we should have a non-NULL pointer */
    netsnmp_assert(NULL != rowreq_ctx);

    /*
     * TODO:452:M: |-> Cleanup ifXTable undo.
     * Undo storage is in (* ifCounterDiscontinuityTime_val_ptr )*
     */

    return rc;
}                               /* ifXTable_undo_cleanup */

/**
 * commit new values.
 *
 * At this point, you should have done everything you can to ensure that
 * this commit will not fail.
 *
 * Should you need different behavior depending on which columns were
 * set, rowreq_ctx->column_set_flags will indicate which writeable columns were
 * set. The definitions for the COLUMN_*_FLAG bits can be found in
 * ifXTable.h.
 * A new row will have the MFD_ROW_CREATED bit set in rowreq_flags.
 *
 * @param rowreq_ctx
 *        Pointer to the users context.
 *
 * @retval MFD_SUCCESS : success
 * @retval MFD_ERROR   : error
 */
int
ifXTable_commit(ifXTable_rowreq_ctx * rowreq_ctx)
{
    int             rc = MFD_SUCCESS;
    int             save_flags;

    DEBUGMSGTL(("verbose:ifXTable:ifXTable_commit", "called\n"));

    /** we should have a non-NULL pointer */
    netsnmp_assert(NULL != rowreq_ctx);

    /*
     * save flags, then clear until we actually do something
     */
    save_flags = rowreq_ctx->column_set_flags;
    rowreq_ctx->column_set_flags = 0;

    /*
     * commit ifXTable data
     * 1) check the column's flag in save_flags to see if it was set.
     * 2) clear the flag when you handle that column
     * 3) set the column's flag in column_set_flags if it needs undo
     *    processing in case of a failure.
     *
     * this is where one would usually commit data. In this case,
     * ifLinkUpDownTrapEnable and ifAlias are purely internal, so
     * nothing needs to be done. That leaves ifPromiscuosMode,
     * which I'm leery about implementing. Thus, at this point,
     * there is nothing to do except twiddle flag bits.
     */
    if (save_flags & COLUMN_IFLINKUPDOWNTRAPENABLE_FLAG) {
        save_flags &= ~COLUMN_IFLINKUPDOWNTRAPENABLE_FLAG;      /* clear ifLinkUpDownTrapEnable */
        /*
         * TODO:482:o: |-> commit column ifLinkUpDownTrapEnable.
         */
        /*
         * set flag, in case we need to undo ifLinkUpDownTrapEnable
         */
        rowreq_ctx->column_set_flags |= COLUMN_IFLINKUPDOWNTRAPENABLE_FLAG;
    }
#ifdef NETSNMP_ENABLE_PROMISCUOUSMODE_SET
    if (save_flags & COLUMN_IFPROMISCUOUSMODE_FLAG) {
        save_flags &= ~COLUMN_IFPROMISCUOUSMODE_FLAG;   /* clear ifPromiscuousMode */
        /*
         * TODO:482:o: |-> commit column ifPromiscuousMode.
         */
        rc = -1;
        if (-1 == rc) {
            snmp_log(LOG_ERR,
                     "ifXTable column ifPromiscuousMode commit failed\n");
        } else {
            /*
             * set flag, in case we need to undo ifPromiscuousMode
             */
            rowreq_ctx->column_set_flags |= COLUMN_IFPROMISCUOUSMODE_FLAG;
        }
    }
#endif                          /* NETSNMP_ENABLE_PROMISCUOUSMODE_SET */

    if (save_flags & COLUMN_IFALIAS_FLAG) {
        save_flags &= ~COLUMN_IFALIAS_FLAG;     /* clear ifAlias */
        /*
         * set flag, in case we need to undo ifAlias
         */
        rowreq_ctx->column_set_flags |= COLUMN_IFALIAS_FLAG;
    }

    /*
     * if we successfully commited this row, set the dirty flag.
     */
    if (MFD_SUCCESS == rc) {
        rowreq_ctx->rowreq_flags |= MFD_ROW_DIRTY;
    }

    if (save_flags) {
        snmp_log(LOG_ERR, "unhandled columns (0x%x) in commit\n",
                 save_flags);
        return MFD_ERROR;
    }

    return rc;
}                               /* ifXTable_commit */

/**
 * undo commit new values.
 *
 * Should you need different behavior depending on which columns were
 * set, rowreq_ctx->column_set_flags will indicate which writeable co