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Neels Hofmeyr nhofmeyr at sysmocom.deOn Tue, May 15, 2018 at 04:49:01PM +0300, Mykola Shchetinin wrote: > We are going to write a simple proxy which converts from GSUP to MAP > and vice versa. GSUP was/is specifically intended to be a simpler subset of MAP that should be easily compatible with MAP. An Open Source MAP proxy to SGSN exists, if that is of interest to you: https://github.com/moiji-mobile/sgsn-mapproxy Anecdotal: GSUP came about because we wanted to connect osmo-sgsn to a 3rd party MAP. I wasn't around at the time, but as far as I understand, we invented GSUP to have a less complex C implementation that talks a leaner protocol over an expensive/slow link, and to convert to MAP closer to the core network and talk to the third party HLR. It was first called "GPRS Subscriber Update Protocol". Now we've started to use the same to talk between osmo-msc and osmo-hlr, and interface osmo-sgsn directly to osmo-hlr, hence now we renamed it to "General Subscriber Update Protocol". So your plan indeed matches what above sgsn-mapproxy was intended for. I'm personally not familiar with MAP though, not sure what effort might be required to proxy for CS as well. And it's written in SmallTalk. ...just thought I'd mention this. Is your MAP proxy going to be Free Software? Since Osmocom lives from contribution, we would highly welcome you sharing your progress and code base with the Osmocom community. (It might even be hosted by osmocom.org??) ~N -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 833 bytes Desc: not available URL: <http://lists.osmocom.org/pipermail/openbsc/attachments/20180516/5f038970/attachment.bin>