ipaddresstable_interface.c

开发snmp的开发包有两个开放的SNMP开发库

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

    DEBUGMSGTL(("internal:ipAddressTable:_mfd_ipAddressTable_set_values",
                "called\n"));

    netsnmp_assert(NULL != rowreq_ctx);

    rowreq_ctx->column_set_flags = 0;
    for (; requests; requests = requests->next) {
        /*
         * set column data
         */
        tri = netsnmp_extract_table_info(requests);
        if (NULL == tri)
            continue;

        rc = _ipAddressTable_set_column(rowreq_ctx,
                                        requests->requestvb, tri->colnum);
        if (MFD_SUCCESS != rc) {
            DEBUGMSGTL(("ipAddressTable:mfd", "error %d from "
                        "ipAddressTable_set_column\n", rc));
            netsnmp_set_request_error(agtreq_info, requests,
                                      SNMP_VALIDATE_ERR(rc));
        }
    }                           /* for results */

    return SNMP_ERR_NOERROR;
}                               /* _mfd_ipAddressTable_set_values */

/*----------------------------------------------------------------------
 *
 * SET: commit
 *
 *---------------------------------------------------------------------*/
/**
 * @internal
 * commit the values
 */
int
_mfd_ipAddressTable_commit(netsnmp_mib_handler *handler,
                           netsnmp_handler_registration *reginfo,
                           netsnmp_agent_request_info *agtreq_info,
                           netsnmp_request_info *requests)
{
    int             rc;
    ipAddressTable_rowreq_ctx *rowreq_ctx =
        netsnmp_container_table_row_extract(requests);

    DEBUGMSGTL(("internal:ipAddressTable:_mfd_ipAddressTable_commit",
                "called\n"));

    netsnmp_assert(NULL != rowreq_ctx);

    rc = ipAddressTable_commit(rowreq_ctx);
    if (MFD_SUCCESS != rc) {
        DEBUGMSGTL(("ipAddressTable:mfd", "error %d from "
                    "ipAddressTable_commit\n", rc));
        netsnmp_request_set_error_all(requests, SNMP_VALIDATE_ERR(rc));
    }

    if (rowreq_ctx->rowreq_flags & MFD_ROW_DIRTY) {
        /*
         * if we successfully commited this row, set the dirty flag. Use the
         * current value + 1 (i.e. dirty = # rows changed).
         * this is checked in post_request...
         */
        ipAddressTable_dirty_set(ipAddressTable_dirty_get() + 1);       /* set table dirty flag */
    }

    return SNMP_ERR_NOERROR;
}

int
_mfd_ipAddressTable_undo_commit(netsnmp_mib_handler *handler,
                                netsnmp_handler_registration *reginfo,
                                netsnmp_agent_request_info *agtreq_info,
                                netsnmp_request_info *requests)
{
    int             rc;
    ipAddressTable_rowreq_ctx *rowreq_ctx =
        netsnmp_container_table_row_extract(requests);

    DEBUGMSGTL(("internal:ipAddressTable:_mfd_ipAddressTable_undo_commit",
                "called\n"));

    netsnmp_assert(NULL != rowreq_ctx);

    if (rowreq_ctx->rowreq_flags & MFD_ROW_DIRTY) {
        u_int           d = ipAddressTable_dirty_get();

        netsnmp_assert(d != 0);
        if (d)
            ipAddressTable_dirty_set(d - 1);
    }

    rc = ipAddressTable_undo_commit(rowreq_ctx);
    if (MFD_SUCCESS != rc) {
        /*
         * nothing we can do about it but log it
         */
        DEBUGMSGTL(("ipAddressTable:mfd", "error %d from "
                    "ipAddressTable_undo_commit\n", rc));
    }

    if (rowreq_ctx->rowreq_flags & MFD_ROW_DIRTY) {
        snmp_log(LOG_WARNING,
                 "ipAddressTable row dirty flag still set after undo_commit\n");
        rowreq_ctx->rowreq_flags &= ~MFD_ROW_DIRTY;
    }

    return SNMP_ERR_NOERROR;
}                               /* _mfd_ipAddressTable_commit */

/*----------------------------------------------------------------------
 *
 * SET: Undo
 *
 *---------------------------------------------------------------------*/
/**
 * @internal
 * undo the value for a particular column
 */
NETSNMP_STATIC_INLINE int
_ipAddressTable_undo_column(ipAddressTable_rowreq_ctx * rowreq_ctx,
                            netsnmp_variable_list * var, int column)
{
    int             rc = SNMPERR_SUCCESS;

    DEBUGMSGTL(("internal:ipAddressTable:_ipAddressTable_undo_column",
                "called for %d\n", column));

    netsnmp_assert(NULL != rowreq_ctx);

    switch (column) {

        /*
         * ipAddressIfIndex(3)/InterfaceIndex/ASN_INTEGER/long(long)//l/A/W/e/R/d/H 
         */
    case COLUMN_IPADDRESSIFINDEX:
        rc = ipAddressIfIndex_undo(rowreq_ctx);
        break;

        /*
         * ipAddressType(4)/INTEGER/ASN_INTEGER/long(u_long)//l/A/W/E/r/D/h 
         */
    case COLUMN_IPADDRESSTYPE:
        rc = ipAddressType_undo(rowreq_ctx);
        break;

        /*
         * ipAddressStatus(7)/IpAddressStatusTC/ASN_INTEGER/long(u_long)//l/A/W/E/r/D/h 
         */
    case COLUMN_IPADDRESSSTATUS:
        rc = ipAddressStatus_undo(rowreq_ctx);
        break;

        /*
         * ipAddressRowStatus(10)/RowStatus/ASN_INTEGER/long(u_long)//l/A/W/E/r/d/h 
         */
    case COLUMN_IPADDRESSROWSTATUS:
        rc = ipAddressRowStatus_undo(rowreq_ctx);
        break;

        /*
         * ipAddressStorageType(11)/StorageType/ASN_INTEGER/long(u_long)//l/A/W/E/r/D/h 
         */
    case COLUMN_IPADDRESSSTORAGETYPE:
        rc = ipAddressStorageType_undo(rowreq_ctx);
        break;

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

    return rc;
}                               /* _ipAddressTable_undo_column */

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

    DEBUGMSGTL(("internal:ipAddressTable:_mfd_ipAddressTable_undo_values",
                "called\n"));

    netsnmp_assert(NULL != rowreq_ctx);

    rc = ipAddressTable_undo(rowreq_ctx);
    if (MFD_SUCCESS != rc) {
        /*
         * nothing we can do about it but log it
         */
        DEBUGMSGTL(("ipAddressTable:mfd", "error %d from "
                    "ipAddressTable_undo\n", rc));
    }

    for (; requests; requests = requests->next) {
        /*
         * set column data
         */
        tri = netsnmp_extract_table_info(requests);
        if (NULL == tri)
            continue;

        rc = _ipAddressTable_undo_column(rowreq_ctx, requests->requestvb,
                                         tri->colnum);
        if (MFD_SUCCESS != rc) {
            /*
             * nothing we can do about it but log it
             */
            DEBUGMSGTL(("ipAddressTable:mfd", "error %d from "
                        "ipAddressTable_undo_column\n", rc));
        }
    }                           /* for results */

    return SNMP_ERR_NOERROR;
}                               /* _mfd_ipAddressTable_undo_values */

/*----------------------------------------------------------------------
 *
 * SET: irreversible commit
 *
 *---------------------------------------------------------------------*/
/**
 * @internal
 * commit irreversible actions
 */
int
_mfd_ipAddressTable_irreversible_commit(netsnmp_mib_handler *handler, netsnmp_handler_registration
                                        *reginfo, netsnmp_agent_request_info
                                        *agtreq_info,
                                        netsnmp_request_info *requests)
{
    ipAddressTable_rowreq_ctx *rowreq_ctx =
        netsnmp_container_table_row_extract(requests);

    DEBUGMSGTL(("internal:ipAddressTable:_mfd_ipAddressTable_irreversible:commit", "called\n"));

    netsnmp_assert(NULL != rowreq_ctx);

    /*
     * check for and handle row creation/deletion
     * and update column exist flags...
     */
    if (rowreq_ctx->rowreq_flags & MFD_ROW_DELETED) {
        if (!(rowreq_ctx->rowreq_flags & MFD_ROW_CREATED))
            CONTAINER_REMOVE(ipAddressTable_if_ctx.container, rowreq_ctx);
    } else {
        if (rowreq_ctx->column_set_flags) {
            rowreq_ctx->column_set_flags = 0;
        }
        if (rowreq_ctx->rowreq_flags & MFD_ROW_CREATED) {
            rowreq_ctx->rowreq_flags &= ~MFD_ROW_CREATED;
            CONTAINER_INSERT(ipAddressTable_if_ctx.container, rowreq_ctx);
        }
    }

    return SNMP_ERR_NOERROR;
}                               /* _mfd_ipAddressTable_irreversible_commit */

/***********************************************************************
 *
 * DATA ACCESS
 *
 ***********************************************************************/
static void     _container_free(netsnmp_container *container);

/**
 * @internal
 */
static int
_cache_load(netsnmp_cache * cache, void *vmagic)
{
    DEBUGMSGTL(("internal:ipAddressTable:_cache_load", "called\n"));

    if ((NULL == cache) || (NULL == cache->magic)) {
        snmp_log(LOG_ERR, "invalid cache for ipAddressTable_cache_load\n");
        return -1;
    }

    /** should only be called for an invalid or expired cache */
    netsnmp_assert((0 == cache->valid) || (1 == cache->expired));

    /*
     * call user code
     */
    return ipAddressTable_container_load((netsnmp_container *) cache->
                                         magic);
}                               /* _cache_load */

/**
 * @internal
 */
static void
_cache_free(netsnmp_cache * cache, void *magic)
{
    netsnmp_container *container;

    DEBUGMSGTL(("internal:ipAddressTable:_cache_free", "called\n"));

    if ((NULL == cache) || (NULL == cache->magic)) {
        snmp_log(LOG_ERR, "invalid cache in ipAddressTable_cache_free\n");
        return;
    }

    container = (netsnmp_container *) cache->magic;

    _container_free(container);
}                               /* _cache_free */

/**
 * @internal
 */
static void
_container_item_free(ipAddressTable_rowreq_ctx * rowreq_ctx, void *context)
{
    DEBUGMSGTL(("internal:ipAddressTable:_container_item_free",
                "called\n"));

    if (NULL == rowreq_ctx)
        return;

    ipAddressTable_release_rowreq_ctx(rowreq_ctx);
}                               /* _container_item_free */

/**
 * @internal
 */
static void
_container_free(netsnmp_container *container)
{
    DEBUGMSGTL(("internal:ipAddressTable:_container_free", "called\n"));

    if (NULL == container) {
        snmp_log(LOG_ERR,
                 "invalid container in ipAddressTable_container_free\n");
        return;
    }

    /*
     * call user code
     */
    ipAddressTable_container_free(container);

    /*
     * free all items. inefficient, but easy.
     */
    CONTAINER_CLEAR(container,
                    (netsnmp_container_obj_func *) _container_item_free,
                    NULL);
}                               /* _container_free */

/**
 * @internal
 * initialize the container with functions or wrappers
 */
void
_ipAddressTable_container_init(ipAddressTable_interface_ctx * if_ctx)
{
    DEBUGMSGTL(("internal:ipAddressTable:_ipAddressTable_container_init",
                "called\n"));

    /*
     * cache init
     */
    if_ctx->cache = netsnmp_cache_create(30,    /* timeout in seconds */
                                         _cache_load, _cache_free,
                                         ipAddressTable_oid,
                                         ipAddressTable_oid_size);

    if (NULL == if_ctx->cache) {
        snmp_log(LOG_ERR, "error creating cache for ipAddressTable\n");
        return;
    }

    if_ctx->cache->flags = NETSNMP_CACHE_DONT_INVALIDATE_ON_SET;

    ipAddressTable_container_init(&if_ctx->container, if_ctx->cache);
    if (NULL == if_ctx->container)
        if_ctx->container =
            netsnmp_containe