Question #229419 on rohc changed:
https://answers.launchpad.net/rohc/+question/229419
Status: Solved => Open
Wei Wang is still having a problem:
Hi Didier,
I got another problem in real communication. Now I'm applying
comp/decomp on a pair of devices that communicate with each other over
the air. To be simple, let's say, device A and device B. The
decompressed packet size of the first received packet is -1. I checked
the reason is that the return size of function d_decode_header(...) is
-1.
if(profile == NULL)
{
rohc_debugf(0, "failed to find profile identified by
0x%04x\n",
profile_id);
return ROHC_ERROR_NO_CONTEXT;
}
The difference between the example and this real application is the
definition of compressor and decompressor. Here is how decompressor is
defined on the receiver(RX) side:
decompressor = rohc_alloc_decompressor(compressor);
It depends on the compressor. However, this compressor should be the one
that is defined on the transmitter(TX) side. Looks like the RX needs the
compressor data from TX. I think some info like profile should be synced
up between two sides. Am I right?
Thanks.
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