ospf_mib_stub.c

vxworks下ospf协议栈

    if ( ospfEnvoy_init_check( pktp, vbp, reqType ) == ERROR )
        return;

    /* build the MIB API request message */
    memset( (char *)&request, 0, sizeof(mApiRequest_t) );
    rc = ospf_envoy_buildGetReq( tcount, tlist, vbp, pEnvoyReq, &request,
                                 ospfMapiIfMetric_OID_OFFSET );
    if ( rc == ERROR )
    {
        ospf_envoy_clearBuffer( pEnvoyReq );
        ospf_envoy_setGenError( pktp, vbp, reqType );
        return;
    }

    /* send the request to MIB API */
    rc = ospfMapiGetIfMetric( &request, reqType );
    if ( rc == ERROR )
    {
        ospf_envoy_clearBuffer( pEnvoyReq );
        ospf_envoy_processGetRespError( pktp, vbp, reqType, request.error );
        return;
    }

    /* retrieve all the values from the request structure */
    ospf_envoy_processGetResp( vbp, pktp, pEnvoyReq, &request, reqType,
                               ospfMapiIfMetric_OID_OFFSET );
    ospf_envoy_clearBuffer( pEnvoyReq );
    return;
}

/***************************************************************************************
* ospfEnvoy_setIfMetric - generic set function for ospfIfMetricTable
*
* This routine is a generic set function for ospfIfMetricTable. It invokes by testproc
* and setproc to test and set objects in varbinds.
*
* RETURNS: N/A
*
* NOMANUAL
*/
LOCAL void ospfEnvoy_setIfMetric( int tcount, OIDC_T *tlist, SNMP_PKT_T *pktp, VB_T *vbp,
                                  mApiReqType_t reqType )
{
    mApiRequest_t request;
    VB_T          *group_vbp;
    STATUS        rc;

    if ( tcount != ospfIfMetricEntry_INST_LEN )
    {
        ospf_envoy_setNoSuchNameError( pktp, vbp, reqType );
        return;
    }

    if ( ospfEnvoy_init_check( pktp, vbp, reqType ) == ERROR )
        return;

    /* use the data provided by the varbinds directly. This eliminates the need
     * to copy the data from varbinds to locally allocated buffer.
     */
    rc = ospf_envoy_buildSetReq( tcount, tlist, pktp, vbp, pEnvoyReq, &request, reqType,
                                 ospfMapiIfMetric_OID_OFFSET );
    if ( rc == ERROR )
    {
        ospf_envoy_setGenError( pktp, vbp, reqType );
        return;
    }

    /* send the request to OSPF MIB API for processing */
    rc = ospfMapiSetIfMetric( &request, reqType );
    if ( rc == ERROR )
    {
        for (group_vbp = vbp; group_vbp != NULL; group_vbp = group_vbp->vb_link )
        {
            group_vbp->vb_priv = NULL;
            if ( reqType == MAPI_TEST )
                testproc_error( pktp, group_vbp, mApi2EnvoyErrorGet( request.error));
            else
            {
                /* tell envoy to start the undo operation. Envoy should call the
                 * undo routine immediately once the setproc_error indicates
                 * the set process has failed.
                 */
                group_vbp->undoproc = ospfEnvoy_undo; /* our undo routine */

                /* issue a fake undo request to mib api so that it can reset its
                 * internal transaction counters.
                 */
                ospfMapiSetIfMetric( &request, MAPI_UNDO );
                setproc_error( pktp, group_vbp, mApi2EnvoyErrorGet( request.error));
            }
        }

        /* tell MIB API we have completed the transaction */
        ospfMapiSetIfMetric( &request, MAPI_COMPLETE );

        ospf_envoy_clearBuffer( pEnvoyReq );
        if ( (pEnvoyReq->dynamic == TRUE) && (pEnvoyReq->pOctetBuf != NULL) )
        {
            SNMP_memory_free( pEnvoyReq->pOctetBuf );
            pEnvoyReq->pOctetBuf = NULL;
        }
        return;
    }

    if ( reqType == MAPI_TEST )
    {
        /* stash the looked up information here for the setproc. Although Envoy
         * provide vb_priv in each varbind, only stash it to the first varbind.
         * MIB API only allow one cookie per request, and we only need one anyhow
         */
        vbp->vb_priv = (void *)request.pReqCookie;
    }

    /* tell MIB API we have completed the transaction */
    if ( reqType == MAPI_COMMIT )
        ospfMapiSetIfMetric( &request, MAPI_COMPLETE );

    /* make the varbind as done and check for any exception in varbinds */
    ospf_envoy_markVarbind( vbp, pktp, &request, reqType );
    ospf_envoy_clearBuffer( pEnvoyReq );
    if (  (pEnvoyReq->dynamic == TRUE) && (pEnvoyReq->pOctetBuf != NULL) )
    {
        SNMP_memory_free( pEnvoyReq->pOctetBuf );
        pEnvoyReq->pOctetBuf = NULL;
    }

    return;
}

/****************************************************************************************
* ospfEnvoy_getVirtIf - generic get routine for ospfVirtIfTable
*
* This is the generic get routine for ospfVirtIfTable. It query the mib api for the table
* row in which the requested object instances can be found. The behavior of the mib api
* is based on request type, either GET or GET_NEXT. If it is a GET_NEXT request, the
* smallest instance that is larger than the given tcount/tlist will be returned.
*
* RETURNS: N/A
*
* NOMANUAL
*/
LOCAL void ospfEnvoy_getVirtIf( int tcount, OIDC_T *tlist, SNMP_PKT_T *pktp, VB_T *vbp,
                                 mApiReqType_t reqType )
{
    mApiRequest_t  request;
    VB_T           *group_vbp;
    char           authKey[4];
    STATUS         rc;

    if ( ospfEnvoy_init_check( pktp, vbp, reqType ) == ERROR )
        return;

    /* the ospfEnvoy_build_getRequest() expects the buffer for the octet string to
     * be allocated by the caller. Loop through the varbinds and determine if
     * there is an object whose type is octet string.
     */
    for ( group_vbp = vbp; group_vbp != NULL; group_vbp = group_vbp->vb_link )
    {
        if ( (group_vbp->vb_ml.ml_leaf->expected_tag == VT_STRING) ||
             (group_vbp->vb_ml.ml_leaf->expected_tag == VT_OPAQUE) )
        {
            if ( group_vbp->vb_ml.ml_last_match != LEAF_ospfVirtIfAuthKey )
                continue;

            /* for ospfVirtIfTable, ospfVirtIfAuthKey is the only object using octet
             * string. RFC1850 requires that the ospfVirtIfAuthKey when read, will always
             * returns an octet string of length zero. Statically allocate an array of
             * ulong_t to satisfy the request
             */
            memset( authKey, 0, sizeof(authKey) );
            pEnvoyReq->pOctetBuf = authKey;
            pEnvoyReq->octetBufLen = sizeof(authKey);

            /* mark this buffer as static */
            pEnvoyReq->dynamic = FALSE;
            break;  /* there can be only one octet string object in a row */
        }
    }

    /* build the MIB API request message */
    memset( (char *)&request, 0, sizeof(mApiRequest_t) );
    rc = ospf_envoy_buildGetReq( tcount, tlist, vbp, pEnvoyReq, &request,
                                 ospfMapiVirtIf_OID_OFFSET );
    if ( rc == ERROR )
    {
        ospf_envoy_setGenError( pktp, vbp, reqType );
        return;
    }

    /* send the request to MIB API */
    rc = ospfMapiGetVirtIf( &request, reqType );
    if ( rc == ERROR )
    {
        ospf_envoy_clearBuffer( pEnvoyReq );
        ospf_envoy_processGetRespError( pktp, vbp, reqType, request.error );
        return;
    }

    /* retrieve all the values from the request structure */
    ospf_envoy_processGetResp( vbp, pktp, pEnvoyReq, &request, reqType,
                               ospfMapiVirtIf_OID_OFFSET );
    return;
}

/***************************************************************************************
* ospfEnvoy_setVirtIf - generic set function for ospfVirtIfTable
*
* This routine is a generic set function for ospfVirtIfTable. It invokes by testproc and
* setproc to test and set objects in varbinds.
*
* RETURNS: N/A
*
* NOMANUAL
*/
LOCAL void ospfEnvoy_setVirtIf( int tcount, OIDC_T *tlist, SNMP_PKT_T *pktp, VB_T *vbp,
                                mApiReqType_t reqType )
{
    mApiRequest_t request;
    VB_T          *group_vbp;
    STATUS        rc;

    if ( tcount != ospfVirtIfEntry_INST_LEN )
    {
        ospf_envoy_setNoSuchNameError( pktp, vbp, reqType );
        return;
    }

    if ( ospfEnvoy_init_check( pktp, vbp, reqType ) == ERROR )
        return;

    /* use the data provided by the varbinds directly. This eliminates the need
     * to copy the data from varbinds to locally allocated buffer.
     */
    rc = ospf_envoy_buildSetReq( tcount, tlist, pktp, vbp, pEnvoyReq, &request, reqType,
                                 ospfMapiVirtIf_OID_OFFSET );
    if ( rc == ERROR )
    {
        ospf_envoy_setGenError( pktp, vbp, reqType );
        return;
    }

    /* send the request to OSPF MIB API for processing */
    rc = ospfMapiSetVirtIf( &request, reqType );
    if ( rc == ERROR )
    {
        for (group_vbp = vbp; group_vbp != NULL; group_vbp = group_vbp->vb_link )
        {
            group_vbp->vb_priv = NULL;
            if ( reqType == MAPI_TEST )
                testproc_error( pktp, group_vbp, mApi2EnvoyErrorGet( request.error));
            else
            {
                /* tell envoy to start the undo operation. Envoy should call the
                 * undo routine immediately once the setproc_error indicates
                 * the set process has failed.
                 */
                group_vbp->undoproc = ospfEnvoy_undo; /* our undo routine */

                /* issue a fake undo request to mib api so that it can reset its
                 * internal transaction counters.
                 */
                ospfMapiSetVirtIf( &request, MAPI_UNDO );
                setproc_error( pktp, group_vbp, mApi2EnvoyErrorGet( request.error));
            }
        }

        /* tell MIB API we have completed the transaction */
        ospfMapiSetVirtIf( &request, MAPI_COMPLETE );

        ospf_envoy_clearBuffer( pEnvoyReq );
        if ( (pEnvoyReq->dynamic == TRUE) && (pEnvoyReq->pOctetBuf != NULL) )
        {
            SNMP_memory_free( pEnvoyReq->pOctetBuf );
            pEnvoyReq->pOctetBuf = NULL;
        }
        return;
    }

    if ( reqType == MAPI_TEST )
    {
        /* stash the looked up information here for the setproc. Although Envoy
         * provide vb_priv in each varbind, only stash it to the first varbind.
         * MIB API only allow one cookie per request, and we only need one anyhow
         */
        vbp->vb_priv = (void *)request.pReqCookie;
    }

    /* tell MIB API we have completed the transaction */
    if ( reqType == MAPI_COMMIT )
        ospfMapiSetVirtIf( &request, MAPI_COMPLETE );

    /* make the varbind as done and check for any exception in varbinds */
    ospf_envoy_markVarbind( vbp, pktp, &request, reqType );
    ospf_envoy_clearBuffer( pEnvoyReq );
    if (  (pEnvoyReq->dynamic == TRUE) && (pEnvoyReq->pOctetBuf != NULL) )
    {
        SNMP_memory_free( pEnvoyReq->pOctetBuf );
        pEnvoyReq->pOctetBuf = NULL;
    }

    return;
}

/****************************************************************************************
* ospfEnvoy_getNbr - generic get routine for ospfNbrTable
*
* This is the generic get routine for ospfNbrTable. It query the mib api for the table
* row in which the requested object instances can be found. The behavior of the mib api
* is based on request type, either GET or GET_NEXT. If it is a GET_NEXT request, the
* smallest instance that is larger than the given tcount/tlist will be returned.
*
* RETURNS: N/A
*
* NOMANUAL
*/
LOCAL void ospfEnvoy_getNbr( int tcount, OIDC_T *tlist, SNMP_PKT_T *pktp, VB_T *vbp,
                             mApiReqType_t reqType )
{
    mApiRequest_t  request;
    STATUS         rc;

    if ( ospfEnvoy_init_check( pktp, vbp, reqType ) == ERROR )
        return;

    /* build the MIB API request message */
    memset( (char *)&request, 0, sizeof(mApiRequest_t) );
    rc = ospf_envoy_buildGetReq( tcount, tlist, vbp, pEnvoyReq, &request,
                                 ospfMapiNbr_OID_OFFSET );
    if ( rc == ERROR )
    {
        ospf_envoy_clearBuffer( pEnvoyReq );
        ospf_envoy_setGenError( pktp, vbp, reqType );
        return;
    }

    /* send the request to MIB API */
    rc = ospfMapiGetNbr( &request, reqType );
    if ( rc == ERROR )
    {
        ospf_envoy_clearBuffer( pEnvoyReq );
        ospf_envoy_processGetRespError( pktp, vbp, reqType, request.error );
        return;
    }

    /* retrieve all the values from the request structure */
    ospf_envoy_processGetResp( vbp, pktp, pEnvoyReq, &request, reqType,
                               ospfMapiNbr_OID_OFFSET );
    ospf_envoy_clearBuffer( pEnvoyReq );
    return;
}

/***************************************************************************************