ipv4interfacetable_interface.c

开发snmp的开发包有两个开放的SNMP开发库

                                     *agtreq_info,
                                     netsnmp_request_info *requests)
{
    ipv4InterfaceTable_rowreq_ctx *rowreq_ctx =
        netsnmp_container_table_row_extract(requests);
    int             rc, packet_rc;

    DEBUGMSGTL(("internal:ipv4InterfaceTable:_mfd_ipv4InterfaceTable_post_request", "called\n"));

    /*
     * wait for last call before calling user
     */
    if (1 != netsnmp_row_merge_status_last(reginfo, agtreq_info)) {
        DEBUGMSGTL(("internal:ipv4InterfaceTable",
                    "waiting for last post_request\n"));
        return SNMP_ERR_NOERROR;
    }

    packet_rc = netsnmp_check_all_requests_error(agtreq_info->asp, 0);
    if ((MFD_SUCCESS != packet_rc) && ipv4InterfaceTable_dirty_get()) {
        /*
         * we shouldn't get here. the undo steps should also clear
         * the dirty flags.
         */
        snmp_log(LOG_WARNING,
                 "ipv4InterfaceTable dirty flag set in post_request "
                 "but status != SUCCESS.\n");
    }

    rc = ipv4InterfaceTable_post_request(ipv4InterfaceTable_if_ctx.
                                         user_ctx, packet_rc);
    if (MFD_SUCCESS != rc) {
        /*
         * nothing we can do about it but log it
         */
        DEBUGMSGTL(("ipv4InterfaceTable", "error %d from "
                    "ipv4InterfaceTable_post_request\n", rc));
    }

    return SNMP_ERR_NOERROR;
}                               /* _mfd_ipv4InterfaceTable_post_request */

/**
 * @internal
 * wrapper
 */
static int
_mfd_ipv4InterfaceTable_object_lookup(netsnmp_mib_handler *handler, netsnmp_handler_registration
                                      *reginfo, netsnmp_agent_request_info
                                      *agtreq_info,
                                      netsnmp_request_info *requests)
{
    int             rc = SNMP_ERR_NOERROR;
    ipv4InterfaceTable_rowreq_ctx *rowreq_ctx =
        netsnmp_container_table_row_extract(requests);

    DEBUGMSGTL(("internal:ipv4InterfaceTable:_mfd_ipv4InterfaceTable_object_lookup", "called\n"));

    /*
     * get our context from mfd
     * ipv4InterfaceTable_interface_ctx *if_ctx =
     *             (ipv4InterfaceTable_interface_ctx *)reginfo->my_reg_void;
     */

    if (NULL == rowreq_ctx) {
        rc = SNMP_ERR_NOCREATION;
    }

    if (MFD_SUCCESS != rc)
        netsnmp_request_set_error_all(requests, rc);
    else
        ipv4InterfaceTable_row_prep(rowreq_ctx);

    return SNMP_VALIDATE_ERR(rc);
}                               /* _mfd_ipv4InterfaceTable_object_lookup */

/***********************************************************************
 *
 * GET processing
 *
 ***********************************************************************/
/*
 * @internal
 * Retrieve the value for a particular column
 */
NETSNMP_STATIC_INLINE int
_ipv4InterfaceTable_get_column(ipv4InterfaceTable_rowreq_ctx * rowreq_ctx,
                               netsnmp_variable_list * var, int column)
{
    int             rc = SNMPERR_SUCCESS;

    DEBUGMSGTL(("internal:ipv4InterfaceTable:_mfd_ipv4InterfaceTable_get_column", "called for %d\n", column));


    netsnmp_assert(NULL != rowreq_ctx);

    switch (column) {

        /*
         * ipv4InterfaceReasmMaxSize(2)/INTEGER32/ASN_INTEGER/long(long)//l/A/w/e/R/d/h 
         */
    case COLUMN_IPV4INTERFACEREASMMAXSIZE:
        var->val_len = sizeof(long);
        var->type = ASN_INTEGER;
        rc = ipv4InterfaceReasmMaxSize_get(rowreq_ctx,
                                           (long *) var->val.string);
        break;

        /*
         * ipv4InterfaceEnableStatus(3)/INTEGER/ASN_INTEGER/long(u_long)//l/A/W/E/r/d/h 
         */
    case COLUMN_IPV4INTERFACEENABLESTATUS:
        var->val_len = sizeof(u_long);
        var->type = ASN_INTEGER;
        rc = ipv4InterfaceEnableStatus_get(rowreq_ctx,
                                           (u_long *) var->val.string);
        break;

        /*
         * ipv4InterfaceRetransmitTime(4)/UNSIGNED32/ASN_UNSIGNED/u_long(u_long)//l/A/w/e/r/D/h 
         */
    case COLUMN_IPV4INTERFACERETRANSMITTIME:
        var->val_len = sizeof(u_long);
        var->type = ASN_UNSIGNED;
        rc = ipv4InterfaceRetransmitTime_get(rowreq_ctx,
                                             (u_long *) var->val.string);
        break;

    default:
        snmp_log(LOG_ERR,
                 "unknown column %d in _ipv4InterfaceTable_get_column\n",
                 column);
        break;
    }

    return rc;
}                               /* _ipv4InterfaceTable_get_column */

int
_mfd_ipv4InterfaceTable_get_values(netsnmp_mib_handler *handler,
                                   netsnmp_handler_registration *reginfo,
                                   netsnmp_agent_request_info *agtreq_info,
                                   netsnmp_request_info *requests)
{
    ipv4InterfaceTable_rowreq_ctx *rowreq_ctx =
        netsnmp_container_table_row_extract(requests);
    netsnmp_table_request_info *tri;
    u_char         *old_string;
    void            (*dataFreeHook) (void *);
    int             rc;

    DEBUGMSGTL(("internal:ipv4InterfaceTable:_mfd_ipv4InterfaceTable_get_values", "called\n"));

    netsnmp_assert(NULL != rowreq_ctx);

    for (; requests; requests = requests->next) {
        /*
         * save old pointer, so we can free it if replaced
         */
        old_string = requests->requestvb->val.string;
        dataFreeHook = requests->requestvb->dataFreeHook;
        if (NULL == requests->requestvb->val.string) {
            requests->requestvb->val.string = requests->requestvb->buf;
            requests->requestvb->val_len =
                sizeof(requests->requestvb->buf);
        } else if (requests->requestvb->buf ==
                   requests->requestvb->val.string) {
            if (requests->requestvb->val_len !=
                sizeof(requests->requestvb->buf))
                requests->requestvb->val_len =
                    sizeof(requests->requestvb->buf);
        }

        /*
         * get column data
         */
        tri = netsnmp_extract_table_info(requests);
        if (NULL == tri)
            continue;

        rc = _ipv4InterfaceTable_get_column(rowreq_ctx,
                                            requests->requestvb,
                                            tri->colnum);
        if (rc) {
            if (MFD_SKIP == rc) {
                requests->requestvb->type = SNMP_NOSUCHINSTANCE;
                rc = SNMP_ERR_NOERROR;
            }
        } else if (NULL == requests->requestvb->val.string) {
            snmp_log(LOG_ERR, "NULL varbind data pointer!\n");
            rc = SNMP_ERR_GENERR;
        }
        if (rc)
            netsnmp_request_set_error(requests, SNMP_VALIDATE_ERR(rc));

        /*
         * if the buffer wasn't used previously for the old data (i.e. it
         * was allcoated memory)  and the get routine replaced the pointer,
         * we need to free the previous pointer.
         */
        if (old_string && (old_string != requests->requestvb->buf) &&
            (requests->requestvb->val.string != old_string)) {
            if (dataFreeHook)
                (*dataFreeHook) (old_string);
            else
                free(old_string);
        }
    }                           /* for results */

    return SNMP_ERR_NOERROR;
}                               /* _mfd_ipv4InterfaceTable_get_values */


/***********************************************************************
 *
 * SET processing
 *
 ***********************************************************************/

/*----------------------------------------------------------------------
 *
 * SET: Syntax checks
 *
 *---------------------------------------------------------------------*/
/*
 * @internal
 * Check the syntax for a particular column
 */
NETSNMP_STATIC_INLINE int
_ipv4InterfaceTable_check_column(ipv4InterfaceTable_rowreq_ctx *
                                 rowreq_ctx, netsnmp_variable_list * var,
                                 int column)
{
    int             rc = SNMPERR_SUCCESS;

    DEBUGMSGTL(("internal:ipv4InterfaceTable:_ipv4InterfaceTable_check_column", "called for %d\n", column));

    netsnmp_assert(NULL != rowreq_ctx);

    switch (column) {
        /*
         * (INDEX) ipv4InterfaceIfIndex(1)/InterfaceIndex/ASN_INTEGER/long(long)//l/a/w/e/R/d/H 
         */
    case COLUMN_IPV4INTERFACEIFINDEX:
        rc = SNMP_ERR_NOTWRITABLE;      /* can not change index of active row */
        break;

        /*
         * ipv4InterfaceReasmMaxSize(2)/INTEGER32/ASN_INTEGER/long(long)//l/A/w/e/R/d/h 
         */
    case COLUMN_IPV4INTERFACEREASMMAXSIZE:
        rc = SNMP_ERR_NOTWRITABLE;
        break;

        /*
         * ipv4InterfaceEnableStatus(3)/INTEGER/ASN_INTEGER/long(u_long)//l/A/W/E/r/d/h 
         */
    case COLUMN_IPV4INTERFACEENABLESTATUS:
        rc = netsnmp_check_vb_type_and_size(var, ASN_INTEGER,
                                            sizeof(rowreq_ctx->data.
                                                   ipv4InterfaceEnableStatus));
        /*
         * check that the value is one of defined enums 
         */
        if ((SNMPERR_SUCCESS == rc)
            && (*var->val.integer != IPV4INTERFACEENABLESTATUS_UP)
            && (*var->val.integer != IPV4INTERFACEENABLESTATUS_DOWN)
            ) {
            rc = SNMP_ERR_WRONGVALUE;
        }
        if (SNMPERR_SUCCESS != rc) {
            DEBUGMSGTL(("ipv4InterfaceTable:_ipv4InterfaceTable_check_column:ipv4InterfaceEnableStatus", "varbind validation failed (eg bad type or size)\n"));
        } else {
            rc = ipv4InterfaceEnableStatus_check_value(rowreq_ctx,
                                                       *((u_long *) var->
                                                         val.string));
            if ((MFD_SUCCESS != rc) && (MFD_NOT_VALID_EVER != rc)
                && (MFD_NOT_VALID_NOW != rc)) {
                snmp_log(LOG_ERR,
                         "bad rc %d from ipv4InterfaceEnableStatus_check_value\n",
                         rc);
                rc = SNMP_ERR_GENERR;
            }
        }
        break;

        /*
         * ipv4InterfaceRetransmitTime(4)/UNSIGNED32/ASN_UNSIGNED/u_long(u_long)//l/A/w/e/r/D/h 
         */
    case COLUMN_IPV4INTERFACERETRANSMITTIME:
        rc = SNMP_ERR_NOTWRITABLE;
        break;

    default:   /** We shouldn't get here */
        rc = SNMP_ERR_GENERR;
        snmp_log(LOG_ERR,
                 "unknown column %d in _ipv4InterfaceTable_check_column\n",
                 column);
    }

    return rc;
}                               /* _ipv4InterfaceTable_check_column */

int
_mfd_ipv4InterfaceTable_check_objects(netsnmp_mib_handler *handler, netsnmp_handler_registration
                                      *reginfo, netsnmp_agent_request_info
                                      *agtreq_info,
                                      netsnmp_request_info *requests)
{
    ipv4InterfaceTable_rowreq_ctx *rowreq_ctx =
        netsnmp_container_table_row_extract(requests);
    netsnmp_table_request_info *tri;
    int             rc;

    DEBUGMSGTL(("internal:ipv4InterfaceTable:_mfd_ipv4InterfaceTable_check_objects", "called\n"));

    netsnmp_assert(NULL != rowreq_ctx);

    for (; requests; requests = requests->next) {

        /*
         * get column number from table request info, and check that column
         */
        tri = netsnmp_extract_table_info(requests);
        if (NULL == tri)
            continue;

        rc = _ipv4InterfaceTable_check_column(rowreq_ctx,
                                              requests->requestvb,
                                              tri->colnum);
        if (rc) {
            netsnmp_request_set_error(requests, SNMP_VALIDATE_ERR(rc));
            break;
        }

    }                           /* for results */

    return SNMP_ERR_NOERROR;
}                               /* _mfd_ipv4InterfaceTable_check_objects */


/*----------------------------------------------------------------------
 *
 * SET: Undo setup
 *
 *---------------------------------------------------------------------*/
/*
 * @internal
 * Set the value for a particular column
 */
NETSNMP_STATIC_INLINE int
_ipv4InterfaceTable_undo_setup_column(ipv4InterfaceTable_rowreq_ctx *
                                      rowreq_ctx, int column)
{
    int             rc = SNMPERR_SUCCESS;

    DEBUGMSGTL(("internal:ipv4InterfaceTable:_ipv4InterfaceTable_undo_setup_column", "called for %d\n", column));

    netsnmp_assert(NULL != rowreq_ctx);

    switch (column) {

        /*
         * ipv4InterfaceEnableStatus(3)/INTEGER/ASN_INTEGER/long(u_long)//l/A/W/E/r/d/h 
         */
    case COLUMN_IPV4INTERFACEENABLESTATUS:
        rowreq_ctx->column_set_flags |=
            COLUMN_IPV4INTERFACEENABLESTATUS_FLAG;
        rc = ipv4InterfaceEnableStatus_undo_setup(rowreq_ctx);
        break;

    default:
        snmp_log(LOG_ERR,
                 "unknown column %d in _ipv4InterfaceTable_undo_setup_column\n",
                 column);
        break;
    }

    return rc;
}                               /* _ipv4InterfaceTable_undo_setup_column */


/**
 * @internal
 * undo setup
 */
int
_mfd_ipv4InterfaceTable_undo_setup(netsnmp_mib_handler *handler,
                                   netsnmp_handler_registration *reginfo,
                                   netsnmp_agent_request_info *agtreq_info,
                                   netsnmp_request_info *requests)
{
    int             rc;
    ipv4InterfaceTable_rowreq_ctx *rowreq_ctx =
        netsnmp_container_table_row_extract(requests);

    DEBUGMSGTL(("internal:ipv4InterfaceTable:_mfd_ipv4InterfaceTable_undo_setup", "called\n"));

    netsnmp_assert(NULL != rowreq_ctx);

    /*
     * allocate undo context
     */
    rc = _mfd_ifTable_undo_setup_allocate(rowreq_ctx);
    if (MFD_SUCCESS != rc) {
        netsnmp_request_set_error_all(requests, rc);
        return SNMP_ERR_NOERROR;
    }

    /*
     * row undo setup
     */
    rc = ipv4InterfaceTable_undo_setup(rowreq_ctx);
    if (MFD_SUCCESS != rc) {
        DEBUGMSGTL(("ipv4InterfaceTable:mfd", "error %d from "
                    "ipv4InterfaceTable_undo_setup\n", rc));
        netsnmp_request_set_error_all(requests, SNMP_VALIDATE_ERR(rc));
    } else {
        /*
         * column undo setup
         */
        netsnmp_table_request_info *tri;
        for (; requests; requests = requests->next) {
            /*
             * set column data
             */
            tri = netsnmp_extract_table_info(requests);
            if (NULL == tri)
                continue;

            rc = _ipv4InterfaceTable_undo_setup_column(rowreq_ctx,
                                                       tri->colnum);
            if (MFD_SUCCESS != rc) {
                DEBUGMSGTL(("ipv4InterfaceTable:mfd", "error %d from "
                            "ipv4InterfaceTable_undo_setup_column\n", rc));
                netsnmp_set_request_error(agtreq_info, requests,
                                          SNMP_VALIDATE_ERR(rc));