ospf_mib_helper.c

vxworks下ospf协议栈

                            pArea->numActiveIf++;

                            /* the numActiveIf should never greater than the number of
                             * interfaces that have been registered to this area. In
                             * case that happens, reset the numActiveIf to the
                             * appropriate value
                             */
                            if ( pArea->numActiveIf > pArea->numIfAttached )
                                pArea->numActiveIf = pArea->numIfAttached;

                            /* update the area attributes if necessary */
                            ospf_mApi_areaStatusUpdate( pArea, initialActiveIf,
                                                        initialActiveHost );
                        }
                        return OK;
                    }

                    /* the numActiveIf counter is only incremented if the row status
                     * for this interface is active and the adminstrative status is
                     * enabled. Therefore, even if the interface row status remains
                     * active, as long as the administrative status has changed, we
                     * need to update the counter
                     */
                    else if ( (currStatus == EmApiOspfRowStatus_active) &&
                              (oldStatus == EmApiOspfRowStatus_active) )
                    {
                        if ( pIf->ospfIfAdminStat == EmApiOspf_enabled )
                        {
                            pArea->numActiveIf++;

                            /* the numActiveIf should never greater than the number of
                             * interfaces that have been registered to this area. In
                             * case that happens, reset the numActiveIf to the
                             * appropriate value
                             */
                            if ( pArea->numActiveIf > pArea->numIfAttached )
                                pArea->numActiveIf = pArea->numIfAttached;

                            /* update the area attributes if necessary */
                            ospf_mApi_areaStatusUpdate( pArea, initialActiveIf,
                                                        initialActiveHost );
                        }
                        else
                        {
                            /* make sure we don't go negative */
                            if ( pArea->numActiveIf > 0 )
                                pArea->numActiveIf--;

                            /* update the area attributes if necessary */
                            ospf_mApi_areaStatusUpdate( pArea, initialActiveIf,
                                                        initialActiveHost );
                        }
                        return OK;
                    }

                    /* special case for handling nvm commit request that configures
                     * the interface using saved configuration from non-volatile
                     * memory. If the row is initially created and the rowStatus value
                     * is now active, update the numActiveIf counter
                     */
                    else if ( (currStatus == EmApiOspfRowStatus_active) &&
                              ((int)oldStatus == RS_undefined) &&
                              (thisMapi->currMapiReqType == MAPI_COMMIT_FORCE) )
                    {
                        if ( pIf->ospfIfAdminStat == EmApiOspf_enabled )
                        {
                            pArea->numActiveIf++;

                            /* the numActiveIf should never greater than the number of
                             * interfaces that have been registered to this area. In
                             * case that happens, reset the numActiveIf to the
                             * appropriate value
                             */
                            if ( pArea->numActiveIf > pArea->numIfAttached )
                                pArea->numActiveIf = pArea->numIfAttached;

                            /* update the area attributes if necessary */
                            ospf_mApi_areaStatusUpdate( pArea, initialActiveIf,
                                                        initialActiveHost );
                        }
                        else
                        {
                            /* make sure we don't go negative */
                            if ( pArea->numActiveIf > 0 )
                                pArea->numActiveIf--;

                            /* update the area attributes if necessary */
                            ospf_mApi_areaStatusUpdate( pArea, initialActiveIf,
                                                        initialActiveHost );
                        }
                        return OK;
                    }
                    else
                    {
                        /* no meaningful state transition made by existing client,
                         * nothing to do
                         */
                        return OK;
                    }
                }
            }
            break;

            case EmApiOspfClientType_vintf:
            {
                mApiOspfVirtIf_t *pVirtIf;
                mApiOspfVirtIf_t *pClient;

                pVirtIf = (mApiOspfVirtIf_t *)pAttachedClient->pClient;
                pClient = (mApiOspfVirtIf_t *)pNewClient;
                if ( (pVirtIf->ospfVirtIfAreaId == pClient->ospfVirtIfAreaId) &&
                     (pVirtIf->ospfVirtIfNeighbor == pClient->ospfVirtIfNeighbor) )
                {
                    mApiOspfPrintf(("ospf_mApi_areaRegisterIf:Client exist\n"));

                    /* get the current client state information */
                    currStatus = pClient->ospfVirtIfStatus;

                    /* remember its previous state */
                    pAttachedClient->oldStatus = oldStatus;

                    /* interface transition from active to notReady or notInService? */
                    if ( (oldStatus == (int)EmApiOspfRowStatus_active) &&
                         ( (currStatus == EmApiOspfRowStatus_notInService) ||
                           (currStatus == EmApiOspfRowStatus_notReady) ) )
                    {
                        /* make sure we don't go negative */
                        if ( pArea->numActiveVirtIf > 0 )
                            pArea->numActiveVirtIf--;

                        /* update the area attributes if necessary */
                        ospf_mApi_areaStatusUpdate( pArea, initialActiveIf,
                                                    initialActiveHost );

                        return OK;
                    }

                    /* interface transition from notInService or notReady to active? */
                    else if ( (currStatus == EmApiOspfRowStatus_active) &&
                              ( (oldStatus == (int)EmApiOspfRowStatus_notInService) ||
                                (oldStatus == (int)EmApiOspfRowStatus_notReady) ) )
                    {
                        pArea->numActiveVirtIf++;

                        /* the numActiveIf should never greater than the number of
                         * virtual interfaces that have been registered to this area. In
                         * case that happens, reset the numActiveVirIf to the
                         * appropriate value
                         */
                        if ( pArea->numActiveVirtIf > pArea->numVirtIfAttached )
                            pArea->numActiveIf = pArea->numVirtIfAttached;

                        /* update the area attributes if necessary */
                        ospf_mApi_areaStatusUpdate( pArea, initialActiveIf,
                                                    initialActiveHost );
                        return OK;
                    }

                    /* special case for handling nvm commit request that configures
                     * the interface using saved configuration from non-volatile
                     * memory. If the row is initially created and the rowStatus value
                     * is now active, update the numActiveIf counter
                     */
                    else if ( (currStatus == EmApiOspfRowStatus_active) &&
                              ((int)oldStatus == RS_undefined) &&
                              (thisMapi->currMapiReqType == MAPI_COMMIT_FORCE) )
                    {
                        pArea->numActiveVirtIf++;

                        /* the numActiveIf should never greater than the number of
                         * virtual interfaces that have been registered to this area. In
                         * case that happens, reset the numActiveVirIf to the
                         * appropriate value
                         */
                        if ( pArea->numActiveVirtIf > pArea->numVirtIfAttached )
                            pArea->numActiveIf = pArea->numVirtIfAttached;

                        /* update the area attributes if necessary */
                        ospf_mApi_areaStatusUpdate( pArea, initialActiveIf,
                                                    initialActiveHost );
                        return OK;
                    }
                    else
                    {
                        /* no meaningful state transition made by existing client,
                         * nothing to do
                         */
                        return OK;
                    }
                }
            }
            break;

            case EmApiOspfClientType_host:
            {
                mApiOspfHost_t *pHostIf;
                mApiOspfHost_t *pClient;

                pHostIf = (mApiOspfHost_t *)pAttachedClient->pClient;
                pClient = (mApiOspfHost_t *)pNewClient;
                if ( (pHostIf->ospfHostIpAddress == pClient->ospfHostIpAddress) &&
                     (pHostIf->ospfHostTOS == pClient->ospfHostTOS) )
                {
                    mApiOspfPrintf(("ospf_mApi_areaRegisterIf:Client exist\n"));

                    /* get the current client state information */
                    currStatus = pClient->ospfHostStatus;

                    /* remember its previous state */
                    pAttachedClient->oldStatus = oldStatus;

                    /* interface transition from active to notReady or notInService? */
                    if ( (oldStatus == (int)EmApiOspfRowStatus_active) &&
                         ( (currStatus == EmApiOspfRowStatus_notInService) ||
                           (currStatus == EmApiOspfRowStatus_notReady) ) )
                    {
                        /* make sure we don't go negative */
                        if ( pArea->numActiveHost > 0 )
                            pArea->numActiveHost--;

                        /* update the area attributes if necessary */
                        ospf_mApi_areaStatusUpdate( pArea, initialActiveIf,
                                                    initialActiveHost );
                        return OK;
                    }

                    /* interface transition from notInService or notReady to active? */
                    else if ( (currStatus == EmApiOspfRowStatus_active) &&
                              ( (oldStatus == (int)EmApiOspfRowStatus_notInService) ||
                                (oldStatus == (int)EmApiOspfRowStatus_notReady) ) )
                    {
                        pArea->numActiveHost++;

                        /* the numActiveIf should never greater than the number of
                         * virtual interfaces that have been registered to this area. In
                         * case that happens, reset the numActiveHostIf to the
                         * appropriate value
                         */
                        if ( pArea->numActiveHost > pArea->numHostAttached )
                            pArea->numActiveHost = pArea->numHostAttached;

                        /* update the area attributes if necessary */
                        ospf_mApi_areaStatusUpdate( pArea, initialActiveIf,
                                                    initialActiveHost );

                        return OK;
                    }

                    /* special case for handling nvm commit request that configures
                     * the interface using saved configuration from non-volatile
                     * memory. If the row is initially created and the rowStatus value
                     * is now active, update the numActiveIf counter
                     */
                    else if ( (currStatus == EmApiOspfRowStatus_active) &&
                              ((int)oldStatus == RS_undefined) &&
                              (thisMapi->currMapiReqType == MAPI_COMMIT_FORCE) )
                    {
                        pArea->numActiveHost++;

                        /* the numActiveIf should never greater than the number of
                         * virtual interfaces that have been registered to this area. In
                         * case that happens, reset the numActiveHostIf to the
                         * appropriate value
                         */
                        if ( pArea->numActiveHost > pArea->numHostAttached )
                            pArea->numActiveHost = pArea->numHostAttached;

                        /* update the area attributes if necessary */
                        ospf_mApi_areaStatusUpdate( pArea, initialActiveIf,
                                                    initialActiveHost );

                        return OK;
                    }
                    else
                    {
                        /* no state transition made by existing client, nothing to do */
                        return OK;
                    }
                }
            }
            break;

            case EmApiOspfClientType_nbr:
            case EmApiOspfClientType_ag:

                mApiOspfPrintf(("ospf_mApi_areaRegisterIf:Incorrect client type\n"));
                break; /* ignore it, should not happen anyway */