[PATCH 1/2] GSM 04.08 message types: apply bitmask makros

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Harald Welte laforge at gnumonks.org
Fri Mar 11 15:24:27 UTC 2016


On Thu, Mar 10, 2016 at 11:22:19PM +0100, Neels Hofmeyr wrote:
> -	msg_type = hdr48->msg_type & 0xbf;
> +	proto = hdr48->proto_discr & GSM48_PDISC_MASK;
> +	msg_type = hdr48->msg_type & GSM48_MT_MM_MSG_TYPE_MASK;

maybe it is a good idea to provide an (inline?) function for this,
which determines the mask based on the rules of TS 24.007 (see my other
mail).

Something like

	msg_type = gsm48hdr_get_msgtype(hdr48);

which would then use the proper mask based on hdr48->proto_discr and the
rules from 24.007.  This way the user (developer) cannot really do
anything wrong and the correct mask is chosen.  Similarly,
gsm48hdr_get_proto(hdr48) could be used for the proto_discr.

Regards,
	Harald
-- 
- Harald Welte <laforge at gnumonks.org>           http://laforge.gnumonks.org/
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