rfc2265.txt

著名的RFC文档,其中有一些文档是已经翻译成中文的的.

                 conceptual row authorizes write access.

                 The identified MIB view is that one for which the
                 vacmViewTreeFamilyViewName has the same value as the
                 instance of this object; if the value is the empty
                 string or if there is no active MIB view having this
                 value of vacmViewTreeFamilyViewName, then no access
                 is granted.
                "
    DEFVAL      { ''H }   -- the empty string
    ::= { vacmAccessEntry 6 }

vacmAccessNotifyViewName OBJECT-TYPE
    SYNTAX       SnmpAdminString (SIZE(0..32))
    MAX-ACCESS   read-create
    STATUS       current
    DESCRIPTION "The value of an instance of this object identifies
                 the MIB view of the SNMP context to which this
                 conceptual row authorizes access for notifications.



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                 The identified MIB view is that one for which the
                 vacmViewTreeFamilyViewName has the same value as the
                 instance of this object; if the value is the empty
                 string or if there is no active MIB view having this
                 value of vacmViewTreeFamilyViewName, then no access
                 is granted.
                "
    DEFVAL      { ''H }   -- the empty string
    ::= { vacmAccessEntry 7 }

vacmAccessStorageType OBJECT-TYPE
    SYNTAX       StorageType
    MAX-ACCESS   read-create
    STATUS       current
    DESCRIPTION "The storage type for this conceptual row.

                 Conceptual rows having the value 'permanent' need not
                 allow write-access to any columnar objects in the row.
                "
    DEFVAL      { nonVolatile }
    ::= { vacmAccessEntry 8 }

vacmAccessStatus OBJECT-TYPE
    SYNTAX       RowStatus
    MAX-ACCESS   read-create
    STATUS       current
    DESCRIPTION "The status of this conceptual row.

                 The  RowStatus TC [RFC1903] requires that this
                 DESCRIPTION clause states under which circumstances
                 other objects in this row can be modified:

                 The value of this object has no effect on whether
                 other objects in this conceptual row can be modified.
                "
    ::= { vacmAccessEntry 9 }

-- Information about MIB views ***************************************

-- Support for instance-level granularity is optional.
--
-- In some implementations, instance-level access control
-- granularity may come at a high performance cost.  Managers
-- should avoid requesting such configurations unnecessarily.

vacmMIBViews     OBJECT IDENTIFIER ::= { vacmMIBObjects 5 }

vacmViewSpinLock OBJECT-TYPE



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    SYNTAX       TestAndIncr
    MAX-ACCESS   read-write
    STATUS       current
    DESCRIPTION "An advisory lock used to allow cooperating SNMP
                 Command Generator applications to coordinate their
                 use of the Set operation in creating or modifying
                 views.

                 When creating a new view or altering an existing
                 view, it is important to understand the potential
                 interactions with other uses of the view.  The
                 vacmViewSpinLock should be retrieved.  The name of
                 the view to be created should be determined to be
                 unique by the SNMP Command Generator application by
                 consulting the vacmViewTreeFamilyTable.  Finally,
                 the named view may be created (Set), including the
                 advisory lock.
                 If another SNMP Command Generator application has
                 altered the views in the meantime, then the spin
                 lock's value will have changed, and so this creation
                 will fail because it will specify the wrong value for
                 the spin lock.

                 Since this is an advisory lock, the use of this lock
                 is not enforced.
                "
    ::= { vacmMIBViews 1 }

vacmViewTreeFamilyTable OBJECT-TYPE
    SYNTAX       SEQUENCE OF VacmViewTreeFamilyEntry
    MAX-ACCESS   not-accessible
    STATUS       current
    DESCRIPTION "Locally held information about families of subtrees
                 within MIB views.

                 Each MIB view is defined by two sets of view subtrees:
                   - the included view subtrees, and
                   - the excluded view subtrees.
                 Every such view subtree, both the included and the
                 excluded ones, is defined in this table.

                 To determine if a particular object instance is in
                 a particular MIB view, compare the object instance's
                 OBJECT IDENTIFIER with each of the MIB view's active
                 entries in this table.  If none match, then the
                 object instance is not in the MIB view.  If one or
                 more match, then the object instance is included in,
                 or excluded from, the MIB view according to the



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                 value of vacmViewTreeFamilyType in the entry whose
                 value of vacmViewTreeFamilySubtree has the most
                 sub-identifiers.  If multiple entries match and have
                 the same number of sub-identifiers, then the
                 lexicographically greatest instance of
                 vacmViewTreeFamilyType determines the inclusion or
                 exclusion.

                 An object instance's OBJECT IDENTIFIER X matches an
                 active entry in this table when the number of
                 sub-identifiers in X is at least as many as in the
                 value of vacmViewTreeFamilySubtree for the entry,
                 and each sub-identifier in the value of
                 vacmViewTreeFamilySubtree matches its corresponding
                 sub-identifier in X.  Two sub-identifiers match
                 either if the corresponding bit of the value of
                 vacmViewTreeFamilyMask for the entry is zero (the
                 'wild card' value), or if they are equal.

                 A 'family' of subtrees is the set of subtrees defined
                 by a particular combination of values of
                 vacmViewTreeFamilySubtree and vacmViewTreeFamilyMask.
                 In the case where no 'wild card' is defined in the
                 vacmViewTreeFamilyMask, the family of subtrees reduces
                 to a single subtree.

                 When creating or changing MIB views, an SNMP Command
                 Generator application should utilize the
                 vacmViewSpinLock to try to avoid collisions. See
                 DESCRIPTION clause of vacmViewSpinLock.

                 When creating MIB views, it is strongly advised that
                 first the 'excluded' vacmViewTreeFamilyEntries are
                 created and then the 'included' entries.

                 When deleting MIB views, it is strongly advised that
                 first the 'included' vacmViewTreeFamilyEntries are
                 deleted and then the 'excluded' entries.

                 If a create for an entry for instance-level access
                 control is received and the implementation does not
                 support instance-level granularity, then an
                 inconsistentName error must be returned.
                "
    ::= { vacmMIBViews 2 }

vacmViewTreeFamilyEntry OBJECT-TYPE
    SYNTAX       VacmViewTreeFamilyEntry



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    MAX-ACCESS   not-accessible
    STATUS       current
    DESCRIPTION "Information on a particular family of view subtrees
                 included in or excluded from a particular SNMP
                 context's MIB view.

                 Implementations must not restrict the number of
                 families of view subtrees for a given MIB view,
                 except as dictated by resource constraints on the
                 overall number of entries in the
                 vacmViewTreeFamilyTable.

                 If no conceptual rows exist in this table for a given
                 MIB view (viewName), that view may be thought of as
                 consisting of the empty set of view subtrees.
                "
    INDEX       { vacmViewTreeFamilyViewName,
                  vacmViewTreeFamilySubtree
                }
    ::= { vacmViewTreeFamilyTable 1 }

VacmViewTreeFamilyEntry ::= SEQUENCE
    {
        vacmViewTreeFamilyViewName     SnmpAdminString,
        vacmViewTreeFamilySubtree      OBJECT IDENTIFIER,
        vacmViewTreeFamilyMask         OCTET STRING,
        vacmViewTreeFamilyType         INTEGER,
        vacmViewTreeFamilyStorageType  StorageType,
        vacmViewTreeFamilyStatus       RowStatus
    }

vacmViewTreeFamilyViewName OBJECT-TYPE
    SYNTAX       SnmpAdminString (SIZE(1..32))
    MAX-ACCESS   not-accessible
    STATUS       current
    DESCRIPTION "The human readable name for a family of view subtrees.
                "
    ::= { vacmViewTreeFamilyEntry 1 }

vacmViewTreeFamilySubtree OBJECT-TYPE
    SYNTAX       OBJECT IDENTIFIER
    MAX-ACCESS   not-accessible
    STATUS       current
    DESCRIPTION "The MIB subtree which when combined with the
                 corresponding instance of vacmViewTreeFamilyMask
                 defines a family of view subtrees.
                "
    ::= { vacmViewTreeFamilyEntry 2 }



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vacmViewTreeFamilyMask OBJECT-TYPE
    SYNTAX       OCTET STRING (SIZE (0..16))
    MAX-ACCESS   read-create
    STATUS       current
    DESCRIPTION "The bit mask which, in combination with the
                 corresponding instance of vacmViewTreeFamilySubtree,
                 defines a family of view subtrees.

                 Each bit of this bit mask corresponds to a
                 sub-identifier of vacmViewTreeFamilySubtree, with the
                 most significant bit of the i-th octet of this octet
                 string value (extended if necessary, see below)
                 corresponding to the (8*i - 7)-th sub-identifier, and
                 the least significant bit of the i-th octet of this
                 octet string corresponding to the (8*i)-th
                 sub-identifier, where i is in the range 1 through 16.

                 Each bit of this bit mask specifies whether or not
                 the corresponding sub-identifiers must match when
                 determining if an OBJECT IDENTIFIER is in this
                 family of view subtrees; a '1' indicates that an
                 exact match must occur; a '0' indicates 'wild card',
                 i.e., any sub-identifier value matches.

                 Thus, the OBJECT IDENTIFIER X of an object instance
                 is contained in a family of view subtrees if, for
                 each sub-identifier of the value of
                 vacmViewTreeFamilySubtree, either:

                   the i-th bit of vacmViewTreeFamilyMask is 0, or

                   the i-th sub-identifier of X is equal to the i-th
                   sub-identifier of the value of
                   vacmViewTreeFamilySubtree.

                 If the value of this bit mask is M bits long and
                 there are more than M sub-identifiers in the
                 corresponding instance of vacmViewTreeFamilySubtree,
                 then the bit mask is extended with 1's to be the
                 required length.

                 Note that when the value of this object is the
                 zero-length string, this extension rule results in
                 a mask of all-1's being used (i.e., no 'wild card'),
                 and the family of view subtrees is the one view
                 subtree uniquely identified by the corresponding
                 instance of vacmViewTreeFamilySubtree.




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                 Note that masks of length greater than zero length
                 do not need to be supported. In this case this
                 object is made read-only.
                "
    DEFVAL      { ''H }
    ::= { vacmViewTreeFamilyEntry 3 }

vacmViewTreeFamilyType OBJECT-TYPE
    SYNTAX       INTEGER  { included(1), excluded(2) }
    MAX-ACCESS   read-create
    STATUS       current
    DESCRIPTION "Indicates whether the corresponding instances of
                 vacmViewTreeFamilySubtree and vacmViewTreeFamilyMask
                 define a family of view subtrees which is included in
                 or excluded from the MIB view.
                "
    DEFVAL      { included }
    ::= { vacmViewTreeFamilyEntry 4 }

vacmViewTreeFamilyStorageType OBJECT-TYPE
    SYNTAX       StorageType
    MAX-ACCESS   read-create