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       slapo-retcode - return code overlay to slapd




       The  retcode  overlay  to  slapd(8)  is  useful to test the behavior of
       clients when server-generated erroneous and/or unusual responses occur,
       e.g. error codes, referrals, excessive response times and so on.

       The error responses are generated according to different strategies.

       In  the  first case, all operations targeted at a specific configurable
       subtree cause the object related to the request DN to be looked up  and
       checked for return code data: a response code, plus an optional textual
       message, an optional configurable delay, an optional matched DN  field,
       and, when the response code is "referral", a (list of) referral(s).

       Well-known response codes from standard track documents are provided in
       retcode.conf, which can be included after instantiating the overlay.

       In the second case, objects of classes inherited from the errAbsObject,
       like errObject or errAuxObject, when returned as intermediate responses
       of a search request, are changed into the response  dictated  by  their

       A  third  mode  causes  objects  to  be  looked  up from the underlying
       database to discover if their class inherits from errABsObject; in that
       case, their content is used to compute the corresponding response.

       The  behavior  is disabled by using the manageDSAit control (RFC 3296);
       in that case, the resulting object, either present in the directory  or
       dynamically  generated  by the overlay, or contained in the request, is
       handled as usual.

       The config directives that are specific to the retcode overlay must  be
       prefixed  by  retcode-,  to avoid conflicts with directives specific to
       the underlying database or to other stacked  overlays.   The  following
       specific directives can be used to configure the retcode overlay:

       retcode-parent <DN>
              This directive defines the parent DN where dynamically generated
              entries reside.  If not defined, the suffix of the  database  is

       retcode-item    <RDN>    <errCode>    [op=<oplist>]    [text=<message>]
              [ref=<referral>]        [sleeptime=<sec>]         [matched=<DN>]
              A dynamically generated  entry,  located  below  retcode-parent.
              The errCode is the number of the response code; it can be in any
              format supported by strtol(3).  The optional oplist is a list of
              operations  that  cause response code generation; if absent, all
              operations are affected.  The matched field is  the  matched  DN
              that  is  returned along with the error, while the text field is
              an optional diagnostics message.  The ref field is only  allowed
              for  the  referral  response  code.   The sleeptime field causes
              slapd(8)  to  sleep  the  specified  number  of  seconds  before
              proceeding  with  the  operation.   The unsolicited field can be
              used to cause the return of an  RFC  4511  unsolicited  response
              message;  if  OID is not "0", an extended response is generated,
              with the optional data appended.  If flags contains  disconnect,
              or   pre-disconnect,   slapd(8)  disconnects  abruptly,  without
              notice; post-disconnect causes disconnection right after sending
              response as appropriate.

              Enables  exploitation  of in-directory stored errAbsObject.  May
              result in a lot of unnecessary overhead.

       retcode-sleep [-]<n>
              Defines a sleep time in seconds that is  spent  before  actually
              handling  any  operation.   If negative, a random time between 0
              and the absolute value of the argument is used.


       The retcode overlay utilizes the "return code" schema described herein.
       This  schema  is specifically designed for use with this overlay and is
       not intended to be used otherwise.  It is also noted  that  the  schema
       described  here  is  a  work  in  progress, and hence subject to change
       without notice.  The schema is loaded automatically by the overlay.

       The schema includes a number of object classes and associated attribute
       types as described below.

       The error code:
               NAME ( 'errCode' )
               DESC 'LDAP error code'
               EQUALITY integerMatch
               ORDERING integerOrderingMatch
               SINGLE-VALUE )

       The operations that trigger the response code:
               NAME ( 'errOp' )
               DESC 'Operations the errObject applies to'
               EQUALITY caseIgnoreMatch
               SUBSTR caseIgnoreSubstringsMatch
               SYNTAX )

       The text message:
               NAME ( 'errText' )
               DESC 'LDAP error textual description'
               EQUALITY caseIgnoreMatch
               SUBSTR caseIgnoreSubstringsMatch
               SINGLE-VALUE )

       The sleep time before the response is actually returned to the client:
               NAME ( 'errSleepTime' )
               DESC 'Time to wait before returning the error'
               EQUALITY integerMatch
               SINGLE-VALUE )

       The matched DN returned to the client:
               NAME ( 'errMatchedDN' )
               DESC 'Value to be returned as matched DN'
               EQUALITY distinguishedNameMatch
               SINGLE-VALUE )

       The OID to be returned as extended response OID in RFC 4511 unsolicited
       responses ("0" generates a regular response with msgid set to 0):
               NAME ( 'errUnsolicitedOID' )
               DESC 'OID to be returned within unsolicited response'
               EQUALITY objectIdentifierMatch
               SINGLE-VALUE )

       The octet string to be returned as extended response data in  RFC  4511
       unsolicited response:
               NAME ( 'errUnsolicitedData' )
               DESC 'Data to be returned within unsolicited response'
               SINGLE-VALUE )

       If  TRUE,  slapd(8)  disconnects  abruptly without notice; if FALSE, it
       disconnects after sending response as appropriate:
               NAME ( 'errDisconnect' )
               DESC 'Disconnect without notice'
               SINGLE-VALUE )

       The abstract class that triggers the overlay:
               NAME ( 'errAbsObject' )
               SUP top ABSTRACT
               MUST ( errCode )
               MAY ( cn $ description $ errOp $ errText $ errSleepTime
                   $ errMatchedDN ) )

       The standalone structural objectclass for specifically created data:
               NAME ( 'errObject' )
               SUP errAbsObject STRUCTURAL )

       The auxiliary objectclass to alter the behavior of existing objects:
               NAME ( 'errAuxObject' )
               SUP errAbsObject AUXILIARY )


              overlay         retcode
              retcode-parent  "ou=RetCodes,dc=example,dc=com"

              # retcode.conf is found in tests/data/ of the source tree
              include         ./retcode.conf

              # Wait 10 seconds, then return success (0x00)
              retcode-item    "cn=Success after 10 seconds" 0x00 sleeptime=10
              # Wait 10 seconds, then return timelimitExceeded (0x03)
              retcode-item    "cn=Timelimit after 10 seconds" 0x03 sleeptime=10


              default slapd configuration file


       slapd.conf(5), slapd-config(5), slapd(8).  The slapo-retcode(5) overlay
       supports dynamic configuration via back-config.


       This  module  was  written  in  2005  by Pierangelo Masarati for SysNet