Hello,
I'm not sure if this is technically an ASN.1 macro because I don't see the
keyword MACRO used. But it seems from my research the term "Rose Macro" may
apply here and it seems there is more than data definitions going on and I need
to learn how this works :-)
This definition below says that it imports OPERATIONS from {joint-iso-ccitt
remote-operations(4) notation(0)}, which lead the implementor to a set of three
modules that seem to be co-dependent and one eventually has OPERATIONS (albeit
in a switch statement):
switch{OPERATION-PACKAGE:package, OBJECT IDENTIFIER:id} OPERATION-PACKAGE ::=
{
OPERATIONS {package.&Both}
CONSUMER INVOKES {package.&Consumer}
SUPPLIER INVOKES {package.&Supplier}
ID id
}
I'm somewhat new to ASN.1, can someone help me understand the .& syntax and the
way these definitions lock themselves together?
It also has that it EXPORTS mLPPLFBquery, mLPPCallrequest, etc. So I assume
that it is adding these individual OPERATION definitions to the greater
OPERATIONS set that it imports, but the syntax is a little difficult to follow.
Is there a good online source for these "advanced" notations? Ultimately, I'd
like to compile this into c constructs, but that's another story, the compiler
I have doesn't understand OPERATION but I'm trying to understand it from a
fundamental level first so I can discern what the compiler might be missing.
thanks,
Keith
( from Q.955 )
-- Begin MLPP-operations definitions
MLPP-operations{ccitt recommendation q 955 mlpp (3) operations-and-errors(1)}
DEFINITIONS ::=
BEGIN
EXPORTS mLPPLFBquery, mLPPCallrequest, mLPPCallpreemption,
unauthorizedPrecedenceLevel;
IMPORTS OPERATIONS, ERRORS
FROM Remote-Operation-Notation
{joint-iso-ccitt remote-operations(4) notation(0)}
userNotSubscribed, rejectedByNetwork
FROM General-Error-List
{ccitt recommendation q 950 general-error-list(1)}
Q931InformationElement
FROM Embedded-Q931-Types
{ccitt recommandation q 932 embedded-q931-types(5)};
-- Begin mLPPLFBquery operation
MLPPLFBquery OPERATION
ARGUMENT MLPP_LFB_arg
RESULT MLPP_LFB_resp
ERRORS {userNotSubscribed,rejectedByNetwork}
MLPP_LFB-arg ::= SEQUENCE {MLPP_params, IE_arg}
MLPP_params ::= SEQUENCE
{Prec_level, LFB_Indictn, MLPP_Svc_Domn}
Prec_level ::= ENUMERATED
{
flashOverride(0), flash(1), immediate(2), priority(3), routine(4)
}
-- Prec_level identifies the precedence level of the MLPP call.
LFB_Indictn ::= ENUMERATED
{
lfbAllowed(0), lfbNotAllowed(1), pathReserved(2)
}
-- LFB_Indictn is coded for values, as indicated.
MLLP_Svc_Domn ::= OCTET STRING (size(5))
-- Initial two octets provide the International ID, while the
-- following three octets provide the MLPP Domain
-- identification.
IE_arg ::= Q931InformationElement
-- Bearer capability, Calling party number, Called party
-- number, and Channel identification information elements in
-- the IE_arg shall be as defined in Q.931.
MLPP_LFB_resp ::= SEQUENCE {StatusQuery, Location}
-- The MLPP DSS1 LFB query response contains two
-- parameters, StatusQuery and Location.
StatusQuery ::= ENUMERATED
{
success(1),
-- Many cases as described in the optional MLPP LFB
failure(2),
-- Many cases as described in the MLPP procedure with LFB
-- option.
bearerCapabilityNotAuthorized(3),
-- bearer capability check failure, not authorized
bearerCapabilityNotImplemented(4),
-- bearer capability check failure, not implemented
bearerCapabilityNotAvailable(5),
-- bearer capability check failure, not available
pathReservationDenied(6)
-- circuit cannot be reserved at the far end
}
Location ::= Q931InformationElement
-- a bit string which conforms to Octect 3 of the Cause
-- information element as defined in Q.931, except that bit 8 is
-- marked as a spare.
-- End of mLPPLFBquery operation.
-- Begin mLPPCallrequest operation
MLPPCallrequest OPERATION MLPP_params
ARGUMENT StatusRequest
RESULT {userNotSubscribed, rejectedByNetwork,
ERRORS unauthorizedPrecedenceLevel}
StatusRequest ::= ENUMERATED
{
successCalledUserMLPPSubscriber(1),
-- Called user is an MLPP subscriber.
successCalledUserNotMLPPSubscriber(2),
-- Called user is not an MLPP subscriber.
failureCaseA(3),
-- MLPP call from the calling user is a precedence call and
-- cannot be completed.
failureCaseB(4)
-- MLPP call from the calling user or MLPP call between two
-- MLPP subscribers experiences preemption.
}
-- End mLPPCallrequest operation.
-- Begin mLPPCallpreemption operation
MLPPCallpreemption OPERATION
ARGUMENT Preempt_params
RESULT
ERRORS
Preempt_params ::= ENUMERATED
{
circuitReservedForReuse(1),
-- Circuit of the to be preempted call is reserved for reuse
circuitNotReservedForReuse(2),
-- Circuit of the to be preempted call is not reserved for
-- reuse
}
-- End mLPPCallpreemption operation
UnauthorizedPrecedenceLevel ::= ERROR
-- An indication that the calling user has exceeded the authorized, maximum
-- precedence level.
mLPPLFBquery MLPPLFBquery ::= 24
mLPPCallrequest MLPPCallrequest ::= 25
mLPPCallpreemption MLPPCallpreemption ::= 26
unauthorizedPrecedenceLevel UnauthorizedPrecedenceLevel ::= 44
END
-- End MLPP-operations.
--
| |
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' '
C I S C O
GGSG VoIP
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