inetnettomediatable_interface.c

snmp的源代码,已经在我的ubuntu下编译通过

    /*
     * inetNetToMediaNetAddress(3)/InetAddress/ASN_OCTET_STR/char(char)//L/a/w/e/R/d/h
     */
    netsnmp_variable_list var_inetNetToMediaNetAddress;

    /*
     * set up varbinds
     */
    memset(&var_inetNetToMediaIfIndex, 0x00,
           sizeof(var_inetNetToMediaIfIndex));
    var_inetNetToMediaIfIndex.type = ASN_INTEGER;
    memset(&var_inetNetToMediaNetAddressType, 0x00,
           sizeof(var_inetNetToMediaNetAddressType));
    var_inetNetToMediaNetAddressType.type = ASN_INTEGER;
    memset(&var_inetNetToMediaNetAddress, 0x00,
           sizeof(var_inetNetToMediaNetAddress));
    var_inetNetToMediaNetAddress.type = ASN_OCTET_STR;

    /*
     * chain temp index varbinds together
     */
    var_inetNetToMediaIfIndex.next_variable =
        &var_inetNetToMediaNetAddressType;
    var_inetNetToMediaNetAddressType.next_variable =
        &var_inetNetToMediaNetAddress;
    var_inetNetToMediaNetAddress.next_variable = NULL;


    DEBUGMSGTL(("verbose:inetNetToMediaTable:inetNetToMediaTable_index_from_oid", "called\n"));

    /*
     * parse the oid into the individual index components
     */
    err = parse_oid_indexes(oid_idx->oids, oid_idx->len,
                            &var_inetNetToMediaIfIndex);
    if (err == SNMP_ERR_NOERROR) {
        /*
         * copy out values
         */
        mib_idx->inetNetToMediaIfIndex =
            *((long *) var_inetNetToMediaIfIndex.val.string);
        mib_idx->inetNetToMediaNetAddressType =
            *((u_long *) var_inetNetToMediaNetAddressType.val.string);
        /*
         * NOTE: val_len is in bytes, inetNetToMediaNetAddress_len might not be
         */
        if (var_inetNetToMediaNetAddress.val_len >
            sizeof(mib_idx->inetNetToMediaNetAddress))
            err = SNMP_ERR_GENERR;
        else {
            memcpy(mib_idx->inetNetToMediaNetAddress,
                   var_inetNetToMediaNetAddress.val.string,
                   var_inetNetToMediaNetAddress.val_len);
            mib_idx->inetNetToMediaNetAddress_len =
                var_inetNetToMediaNetAddress.val_len /
                sizeof(mib_idx->inetNetToMediaNetAddress[0]);
        }


    }

    /*
     * parsing may have allocated memory. free it.
     */
    snmp_reset_var_buffers(&var_inetNetToMediaIfIndex);

    return err;
}                               /* inetNetToMediaTable_index_from_oid */


/*
 *********************************************************************
 * @internal
 * allocate resources for a inetNetToMediaTable_rowreq_ctx
 */
inetNetToMediaTable_rowreq_ctx *
inetNetToMediaTable_allocate_rowreq_ctx(inetNetToMediaTable_data * data)
{
    inetNetToMediaTable_rowreq_ctx *rowreq_ctx =
        SNMP_MALLOC_TYPEDEF(inetNetToMediaTable_rowreq_ctx);

    DEBUGMSGTL(("internal:inetNetToMediaTable:inetNetToMediaTable_allocate_rowreq_ctx", "called\n"));

    if (NULL == rowreq_ctx) {
        snmp_log(LOG_ERR, "Couldn't allocate memory for a "
                 "inetNetToMediaTable_rowreq_ctx.\n");
    } else {
        if (NULL != data) {
            rowreq_ctx->data = data;
        } else if (NULL ==
                   (rowreq_ctx->data =
                    inetNetToMediaTable_allocate_data())) {
            SNMP_FREE(rowreq_ctx);
            return NULL;
        }
    }

    /*
     * undo context will be allocated when needed (in *_undo_setup)
     */

    rowreq_ctx->oid_idx.oids = rowreq_ctx->oid_tmp;

    rowreq_ctx->inetNetToMediaTable_data_list = NULL;
    rowreq_ctx->inetNetToMediaTable_reg =
        inetNetToMediaTable_if_ctx.user_ctx;


    return rowreq_ctx;
}                               /* inetNetToMediaTable_allocate_rowreq_ctx */

/*
 * @internal
 * release resources for a inetNetToMediaTable_rowreq_ctx
 */
void
inetNetToMediaTable_release_rowreq_ctx(inetNetToMediaTable_rowreq_ctx *
                                       rowreq_ctx)
{
    DEBUGMSGTL(("internal:inetNetToMediaTable:inetNetToMediaTable_release_rowreq_ctx", "called\n"));

    netsnmp_assert(NULL != rowreq_ctx);


    if (rowreq_ctx->data)
        inetNetToMediaTable_release_data(rowreq_ctx->data);

    if (rowreq_ctx->undo)
        inetNetToMediaTable_release_data(rowreq_ctx->undo);

    /*
     * free index oid pointer
     */
    if (rowreq_ctx->oid_idx.oids != rowreq_ctx->oid_tmp)
        free(rowreq_ctx->oid_idx.oids);

    SNMP_FREE(rowreq_ctx);
}                               /* inetNetToMediaTable_release_rowreq_ctx */

/**
 * @internal
 * wrapper
 */
static int
_mfd_inetNetToMediaTable_pre_request(netsnmp_mib_handler *handler,
                                     netsnmp_handler_registration *reginfo,
                                     netsnmp_agent_request_info
                                     *agtreq_info,
                                     netsnmp_request_info *requests)
{
    int             rc =
        inetNetToMediaTable_pre_request(inetNetToMediaTable_if_ctx.
                                        user_ctx);
    if (MFD_SUCCESS != rc) {
        /*
         * nothing we can do about it but log it
         */
        DEBUGMSGTL(("internal:inetNetToMediaTable", "error %d from "
                    "inetNetToMediaTable_pre_request\n", rc));
        netsnmp_request_set_error_all(requests, SNMP_VALIDATE_ERR(rc));
    }

    return SNMP_ERR_NOERROR;
}                               /* _mfd_inetNetToMediaTable_pre_request */

/**
 * @internal
 * wrapper
 */
static int
_mfd_inetNetToMediaTable_post_request(netsnmp_mib_handler *handler, netsnmp_handler_registration
                                      *reginfo, netsnmp_agent_request_info
                                      *agtreq_info,
                                      netsnmp_request_info *requests)
{
    inetNetToMediaTable_rowreq_ctx *rowreq_ctx;
    int             rc =
        inetNetToMediaTable_post_request(inetNetToMediaTable_if_ctx.
                                         user_ctx);
    if (MFD_SUCCESS != rc) {
        /*
         * nothing we can do about it but log it
         */
        DEBUGMSGTL(("internal:inetNetToMediaTable", "error %d from "
                    "inetNetToMediaTable_post_request\n", rc));
    }

    /*
     * if it was set, clear row created flag.
     */
    rowreq_ctx = netsnmp_container_table_row_extract(requests);
    if ((NULL != rowreq_ctx)
        && (rowreq_ctx->rowreq_flags & MFD_ROW_CREATED))
        rowreq_ctx->rowreq_flags &= ~MFD_ROW_CREATED;

    return SNMP_ERR_NOERROR;
}                               /* _mfd_inetNetToMediaTable_post_request */

/**
 * @internal
 * wrapper
 */
static int
_mfd_inetNetToMediaTable_object_lookup(netsnmp_mib_handler *handler, netsnmp_handler_registration
                                       *reginfo, netsnmp_agent_request_info
                                       *agtreq_info,
                                       netsnmp_request_info *requests)
{
    inetNetToMediaTable_rowreq_ctx *rowreq_ctx =
        netsnmp_container_table_row_extract(requests);

    DEBUGMSGTL(("internal:inetNetToMediaTable:_mfd_inetNetToMediaTable_object_lookup", "called\n"));

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

    if (NULL == rowreq_ctx) {
        int             rc = MFD_SUCCESS;
        netsnmp_table_request_info *tblreq_info;
        netsnmp_index   oid_idx;
        inetNetToMediaTable_mib_index mib_idx;

        tblreq_info = netsnmp_extract_table_info(requests);
        if (NULL == tblreq_info) {
            snmp_log(LOG_ERR, "request had no table info\n");
            return MFD_ERROR;
        }

        /*
         * try to parse oid
         */
        oid_idx.oids = tblreq_info->index_oid;
        oid_idx.len = tblreq_info->index_oid_len;
        rc = inetNetToMediaTable_index_from_oid(&oid_idx, &mib_idx);
        if (MFD_SUCCESS != rc) {
            DEBUGMSGT(("inetNetToMediaTable", "error parsing index\n"));
            netsnmp_request_set_error_all(requests, SNMP_VALIDATE_ERR(rc));
        } else {
            /*
             * allocate new context
             */
            rowreq_ctx = inetNetToMediaTable_allocate_rowreq_ctx(NULL);
            if (NULL == rowreq_ctx)
                return MFD_ERROR;       /* msg already logged */

            memcpy(&rowreq_ctx->tbl_idx, &mib_idx, sizeof(mib_idx));

            /*
             * check indexes
             */
            rc = _inetNetToMediaTable_check_indexes(rowreq_ctx);
            if (MFD_SUCCESS != rc) {
                netsnmp_assert((rc == SNMP_ERR_NOCREATION) ||
                               (rc == SNMP_ERR_INCONSISTENTNAME));
                netsnmp_request_set_error_all(requests,
                                              SNMP_VALIDATE_ERR(rc));
                inetNetToMediaTable_release_rowreq_ctx(rowreq_ctx);
            } else {
                rowreq_ctx->rowreq_flags |= MFD_ROW_CREATED;
                netsnmp_container_table_row_insert(requests, rowreq_ctx);
            }
        }
    } else {
        inetNetToMediaTable_row_prep(rowreq_ctx);
    }

    return SNMP_ERR_NOERROR;
}                               /* _mfd_inetNetToMediaTable_object_lookup */

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

    DEBUGMSGTL(("internal:inetNetToMediaTable:_mfd_inetNetToMediaTable_get_column", "called\n"));


    netsnmp_assert(NULL != rowreq_ctx);

    switch (column) {

        /*
         * inetNetToMediaPhysAddress(4)/PhysAddress/ASN_OCTET_STR/char(char)//L/A/W/e/R/d/H 
         */
    case COLUMN_INETNETTOMEDIAPHYSADDRESS:
        var->type = ASN_OCTET_STR;
        rc = inetNetToMediaPhysAddress_get(rowreq_ctx,
                                           (char **) &var->val.string,
                                           &var->val_len);
        break;

        /*
         * inetNetToMediaLastUpdated(5)/TimeStamp/ASN_TIMETICKS/u_long(u_long)//l/A/w/e/r/d/h 
         */
    case COLUMN_INETNETTOMEDIALASTUPDATED:
        var->val_len = sizeof(u_long);
        var->type = ASN_TIMETICKS;
        rc = inetNetToMediaLastUpdated_get(rowreq_ctx,
                                           (u_long *) var->val.string);
        break;

        /*
         * inetNetToMediaType(6)/INTEGER/ASN_INTEGER/long(u_long)//l/A/W/E/r/D/h 
         */
    case COLUMN_INETNETTOMEDIATYPE:
        var->val_len = sizeof(u_long);
        var->type = ASN_INTEGER;
        rc = inetNetToMediaType_get(rowreq_ctx,
                                    (u_long *) var->val.string);
        break;

        /*
         * inetNetToMediaState(7)/INTEGER/ASN_INTEGER/long(u_long)//l/A/w/E/r/d/h 
         */
    case COLUMN_INETNETTOMEDIASTATE:
        var->val_len = sizeof(u_long);
        var->type = ASN_INTEGER;
        rc = inetNetToMediaState_get(rowreq_ctx,
                                     (u_long *) var->val.string);
        break;

        /*
         * inetNetToMediaRowStatus(8)/RowStatus/ASN_INTEGER/long(u_long)//l/A/W/E/r/d/h 
         */
    case COLUMN_INETNETTOMEDIAROWSTATUS:
        var->val_len = sizeof(u_long);
        var->type = ASN_INTEGER;
        rc = inetNetToMediaRowStatus_get(rowreq_ctx,
                                         (u_long *) var->val.string);
        break;

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

    return rc;
}                               /* _inetNetToMediaTable_get_column */

int
_mfd_inetNetToMediaTable_get_values(netsnmp_mib_handler *handler,
                                    netsnmp_handler_registration *reginfo,
                                    netsnmp_agent_request_info
                                    *agtreq_info,
                                    netsnmp_request_info *requests)
{
    inetNetToMediaTable_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:inetNetToMediaTable:_mfd_inetNetToMediaTable_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 = _inetNetToMediaTable_get_column(rowreq_ctx,
                                             requests->requestvb,
                                             tri->colnum);
        if (rc) {
            if (MFD_SKIP == rc) {
                requests->requestvb->type = ASN_PRIV_RETRY;
                rc = SNMP_ERR_NOERROR;