On Fri, 26 May 2000 rleggitt@concentric.net wrote:

> > MakePacket(LCP,REQ,number,"\x0E\x02\x06\x00\x0A\x00\x00\x07\x02\x08\x02");
> Each of these escape sequences compiles to a single char of the specified
> hex value, so "\x00" compiles to binary 0, but zero is string terminator
> and can't be contained within a string. If the compiler let it go,
> MakePacket would fail because it would see the first \x00 as the end of
> the string.

I don't think it made MakePacket fail, since I lifted this straight out of
Microchip's AN724 source listing.  See my reply to Jim, though, I did
mistakenly leave out one bit of the function, the last term was const
unsigned char *str, not unsigned char *str.

I haven't learned anything about pointers and such yet - can you tell?

> You need something like:
>
> const unsigned char IPhack[] = { 0x0e, 0x02, 0x06, 0x00, 0x0a ... };
>
> and add packet length param to MakePacket e.g.
>
> MakePacket(LCP,REQ,number,IPhack,sizeof(IPhack));

I can see where this would work, though I'd also have to rewrite a
considerable portion of MakePacket, I think.  I'm looking at it and trying
to get my brain cells wrapped around it now, in fact.  Like I said, I'm
not a programmer...  though it's looking more and more like it all the
time, at least where PICs are concerned.

Dale
---
The most exciting phrase to hear in science, the one that heralds new
discoveries, is not "Eureka!" (I found it!) but "That's funny ..."
                -- Isaac Asimov