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Holger Freyther holger at freyther.de
> On 15 Apr 2016, at 12:16, Max <msuraev at sysmocom.de> wrote:
>
> Hi.
>
> How to properly use range_enc_arfcns() and range_enc_range*() from
> arfcn_range_decode.h? There're not many comments around the code. From
> function signature it seems like range_enc_arfcns() will put results
> into w parameter but in system_information.c after that there's also
> call to one of range_enc_range*().
>
> I've tried to feed output to wireshark but it decode some unexpected
> stuff. So, if I have a sequence of ints which I'd like to run through
> range512 for example - ho do I get the output?
1st Determine which range to use
2nd filter out ARFCNs, e.g. if ARFCN 0 is included in the set or not
3rd encode according to the range
does this already help?
range = range_enc_determine_range(arfcns, arfcns_used, &f0);
if (range == ARFCN_RANGE_INVALID)
return -2;
/*
* Manipulate the ARFCN list according to the rules in J4 depending
* on the selected range.
*/
arfcns_used = range_enc_filter_arfcns(arfcns, arfcns_used,
f0, &f0_included);
memset(w, 0, sizeof(w));
rc = range_enc_arfcns(range, arfcns, arfcns_used, w, 0);
if (rc != 0)
...
switch (range) {
case ARFCN_RANGE_128:
return range_enc_range128(chan_list, f0, w);
break;
case ARFCN_RANGE_256: