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Harald Welte laforge at gnumonks.orgHi Sylvain, On Mon, Apr 18, 2011 at 02:19:18PM +0200, Sylvain Munaut wrote: > To add support for traffic extraction, it's necessary to introduce > some nothing of "state" in the MAC layer (since the DL_USAGE must be > 'remembered' to know how to interpret further data) ... > > Any suggestion how to achieve that as cleanly as possible ? > > Having a global doesn't sound that nice, but passing a struct around either. > Maybe introduce a pointer to a 'tetra_state' in the primitive struct ? I have been thinking about the same issue while working on the LLC reassembly, which obviously also needs state. I guess in the end we will have something like a global 'tetra_carrier_state' struct, which then has sub-structs for the logical channels that we see. And as I've now extended the primitive to use a msgb for storing the actual unpacked type-1 bits, I guess we could simply use something out of msgb->cb to point to the 'lchan' (in OpenBSC terminology). Cheers, Harald -- - Harald Welte <laforge at gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)