14 Mar
2016
14 Mar
'16
2:05 a.m.
On Fri, Mar 11, 2016 at 10:18:57PM +0700, Harald Welte wrote:
Please see 11.2.3.2.1 and 11.2.3.2.2 of 3GPP TS
24.007, e.g. the latest
version 12.0.0 Release 12 as available from
http://www.etsi.org/deliver/etsi_ts/124000_124099/124007/12.00.00_60/ts_124…
There you can see that in Release99 and later networks, the message type
for MM, CC and SS is defined as having the upper two bits as "N (SD)",
whereas other protocols have other definitions for those bits.
"N (SD)" is described in 11.2.3.2.3 of the same spec
Ah, interesting!
I'm not entirely sure how we want to handle whether we're Release99 or not
... is all our code Release99 per se (that's 17 years ago, right!?), or
should that be decided at compile or run time?
Here, I'd use the 0x3f mask for MM and CC, period; particularly because
none of our message type definitions use bit 8 anyway. Opinions?
~Neels
--
- Neels Hofmeyr <nhofmeyr(a)sysmocom.de> http://www.sysmocom.de/
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