osmo-hlr - Osmocom HLR for GSUP protocol towards OsmoSGSN and OsmoCSCN

Age	Commit message (Collapse)	Author	Files	Lines
2020-04-30	D-GSM 3/n: implement roaming by mslookup in osmo-hlr	Neels Hofmeyr	1	-0/+4
	Add mslookup client to find remote home HLRs of unknown IMSIs, and proxy/forward GSUP for those to the right remote HLR instances. Add remote_hlr.c to manage one GSUP client per remote HLR GSUP address. Add proxy.c to keep state about remotely handled IMSIs (remote GSUP address, MSISDN, and probably more in future patches). The mslookup_server that determines whether a given MSISDN is attached locally now also needs to look in the proxy record: it is always the osmo-hlr immediately peering for the MSC that should respond to mslookup service address queries like SIP and SMPP. (Only gsup.hlr service is always answered by the home HLR.) Add dgsm.c to set up an mdns mslookup client, ask for IMSI homes, and to decide which GSUP is handled locally and which needs to go to a remote HLR. Add full VTY config and VTY tests. For a detailed overview of the D-GSM and mslookup related files, please see the elaborate comment at the top of mslookup.c (already added in an earlier patch). Change-Id: I2fe453553c90e6ee527ed13a13089900efd488aa
2020-04-30	D-GSM 2/n: implement mDNS method of mslookup server	Neels Hofmeyr	1	-0/+3
	Implement the mslookup server's mDNS responder, to actually service remote mslookup requests: - VTY mslookup/server config with service names, - the mslookup_mdns_server listening for mslookup requests, For a detailed overview of the D-GSM and mslookup related files, please see the elaborate comment at the top of mslookup.c (already added in an earlier patch). Change-Id: I5cae6459090588b4dd292be90a5e8903432669d2
2020-04-30	D-GSM 1/n: add mslookup server in osmo-hlr	Neels Hofmeyr	1	-0/+65
	Implement the mslookup server to service remote mslookup requests. This patch merely adds the logic to answer incoming mslookup requests, an actual method to receive requests (mDNS) follows in a subsequent patch. - API to configure service names and addresses for the local site (per MSC). - determine whether a subscriber is on a local MSC (checking the local proxy will be added in subsequent patch that adds proxy capability). - VTY config follows in a subsequent patch. For a detailed overview of the D-GSM and mslookup related files, please see the elaborate comment at the top of mslookup.c (already added in an earlier patch). Change-Id: Ife4a61d71926d08f310a1aeed9d9f1974f64178b