HDLC help

[faisal]

i want to implement decoding of HDLC frames in C.Can anyone provide me
the full structure of HDLC Frame.I myself implemented it in C.But in
output i am getting message along with garbage.For example if i have
Decoded "i eat apple",i m getting the message "&i e#t !ppl#".How can i
resolve this garbage problem.i m getting so much noise in my original
message.Can anybody help with the pseudocode.I want to know how i can
discard the eroorneous Frames.

[James Carlson]

Post by faisal
i want to implement decoding of HDLC frames in C.Can anyone provide me
the full structure of HDLC Frame.I myself implemented it in C.But in
output i am getting message along with garbage.For example if i have
Decoded "i eat apple",i m getting the message "&i e#t !ppl#".How can i
resolve this garbage problem.i m getting so much noise in my original
message.Can anybody help with the pseudocode.I want to know how i can
discard the eroorneous Frames.

What sort of HDLC frames? Are you talking about PPP's HDLC-like
framing (this is comp.protocols.ppp, after all), or about something
else? On async or synchronous lines?

I have some rudimentary AHDLC and LAP-B code here:

http://www.workingcode.com/ppp/carlson-ppp-2.0.tar.gz

... but unless you can be more clear about what you need (and on what
operating system), this may not help much.