CCN Lite: Add "no 8-Bit support" to documentation

[Citrullin]

I tried one CCN Lite example. While compiling I got many errors. I fixed some of them, until I reached the following point:

ccnl-pkt-ccntlv.c:508:5: error: left shift count >= width of type [-Werror]

ccntlv line 508

    if ( (unsigned int)len >= ((1 << 16) - sizeof(struct ccnx_tlvhdr_ccnx2015_s)))
        return -1;

Since CCN Lite shifts 16 bits, I guess 8-Bit MCUs are not supported. I recommend to add this somewhere to the documentation. :) There are also other places where CCN Lite shifts 16 bits.

[jnohlgard]

I guess ccn lite assumes int is 32 bit. This should be fixed upstream, but I guess you should be able to add a cast to uint32_t on the left shift to fix it.

[mfrey]

CCN-lite lacks precision in the length of types. My assumption is that this is partially due to the fact that it supports multiple message formats. We've already discussed this briefly and it is already an item on a todo list

[Citrullin]

@mfrey Of course, it would be great to get a fix for it :) But for now, I think a short notice in the documentation is just fine. So, that new User don't need to search for it etc. (just for networking with CCN Lite). :) I think the fix takes a bit more time than writing something into the docu.

[PeterKietzmann]

It's documented here in the ccn-lite FAQ. @Citrullin, @cgundogan would you provide that information in the RIOT doc? I'm adding the Hack'n'ACK label for that.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. If you want me to ignore this issue, please mark it with the "State: don't stale" label. Thank you for your contributions.

[miri64]

Ping @Citrullin @cgundogan?

[Citrullin]

@miri64 I don't really care about this. Looks like the general interest is not really high.

[cgundogan]

see cn-uofbasel/ccn-lite#363. Once merged, this issue should resolve.

[miri64]

Merged, so I guess all we need now is a version bump of CCN-lite to close this issue ;-).

[miri64]

Afair, last time this broke a few things with the shell commands. But I might be wrong.

For this we have testing.

[cgundogan]

@Citrullin just out of curiosity: which AVR board did you use to compile ccn-lite?

[Citrullin]

@Citrullin just out of curiosity: which AVR board did you use to compile ccn-lite?

Some Arduino clone as I remember. Some ATMEGA328P.