I hope that someone on this list can find time to answer to Anthony.
I am preparing the ASN.1 meeting of next week and won't find time to
handle such
requests before 2 weeks, I'm afraid.
-------- Original Message --------
Subject: [ASN.1] Hex level encoding problem
Date: Wed, 9 Jan 2002 15:23:35 +0200
From: Anthony Mamacos <[EMAIL PROTECTED]>
To: "DUBUISSON Olivier FTRD/DTL"
<[EMAIL PROTECTED]>
Hi Oliver,
I saw that you answer quiet a lot of questions on the message
boards and I had a question I need urgently answered , so I hope
you don't mind the direct email , if you do please ignore it and
I won't bother you again.
I'm a developer working on implementing a ASN1 Tap3
encoder for the company I'm currently working for and
unfortunately they don't want to purchase a ready
made encoder. I was wondering if you could help me
out , I'll give a brief explanation of what I've done so far.
I've developed a dynamic doubly linked list which holds
all the composite and primitive tags , I do one run once
I am finished encoding to set up all the lengths of the tag
so my code ends up looking like
// Create Transfer Batch
A->set_Node(TRANSFERBATCH,APPLICATION);
// End Transfer Batch
//Create BatchControlInfo
A->find_LastTag(TRANSFERBATCH);
A->find_freeSpace();
A->set_Node(BATCHCONTROLINFO,APPLICATION);
//Set Recieving PLMN
A->find_LastTag(BATCHCONTROLINFO);
A->find_freeSpace();
strcpy(T , "AUSOP");
A->set_Node(RECIPIENT,APPLICATION,*T);
//Then a final
A->set_Lengths();
the set_Node procedure has a few overloaded types to say whether is
composite or primitive
BCD , Binary or String (IA5) and then I have a final A->write_file()
procedure to output for
distribution.
My problem is that I am building a file according to another file I have
which was
encoded perfectly by another system and I want the files to match 100%
by the
time I'm done. This is thier encoded tag in hex
Theirs
--------------------------------
66 82 02 49 7F 81 6A
Mine
---------------------------------
66 85 20 7F 81 6A
Both - 66 Is the TAG , being a COMPOSITE APPLICATION TAG 6
Theirs - 82 02 49 - 82 02 should be the LENGTH portion but it's not big
enough and 49
is nothing at all
Mine - 85 20 is the LENGTH
Both - 7F 81 6A is a composite tag inside the current TAG (ie Data
Portion)
NOTE - The Lengths portions might not match up 100% even when correct at
the moment
What I'd like to know is if there is any other way to encode ASN.1 TAP3
than the straight forward TLV ?
or if anything can come between L & V ?
Many Thanks,
Anthony Mamacos
Software Developer
SOFTWARE FUTURES
the business advantage
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