== Managing Subscribers

Subscribers are kept in a local SQLite database file and can be managed via VTY
and CTRL interfaces.

This section provides some examples; also refer to the OsmoHLR VTY reference
manual <<vty-ref-osmohlr>> as well as the Control interface described in
<<hlr-ctrl>>.

=== Example: Add/Update/Delete Subscriber via VTY

The following telnet VTY session adds a subscriber complete with GSM (2G) and
UMTS (3G and 2G) authentication tokens, and finally removes the subscriber
again; it assumes that osmo-hlr is running and listening for telnet VTY
connections on localhost:

----
$ telnet localhost 4258
include::../example_subscriber_add_update_delete.vty[]
----

[[subscriber-params]]
=== Subscriber Parameters

The following parameters are managed for each subscriber of the HLR, modelled
roughly after 3GPP TS 23.008, version 13.3.0; note that not all of these
parameters are necessarily in active use.

The `aud3g` table also applies to 2G networks: it provides UMTS AKA tokens for
Milenage authentication, which is available both on 3G and 2G networks. On 2G,
when both MS and network are R99 capable (like OsmoMSC and OsmoSGSN are), the
full UMTS AKA with Milenage keys from `aud_3g`, using AUTN and extended RES
tokens, is available. With pre-R99 MS or network configurations, the GSM AKA
compatible variant of Milenage, still using the Milenage keys from `aud_3g` but
transceiving only RAND and SRES, may be applicable. (See 3GPP TS 33.102, chapter
6.8.1, Authentication and key agreement of UMTS subscribers.)

.OsmoHLR's subscriber parameters
[options="header",width="100%",cols="20%,20%,60%"]
|===
|Name|Example|Description
|imsi|901700000014701|identity of the SIM/USIM, 3GPP TS 23.008 chapter 2.1.1.1
|msisdn|2342123|number to dial to reach this subscriber (multiple MSISDNs can be stored per subscriber), 3GPP TS 23.008 chapter 2.1.2
|imeisv|4234234234234275|identity of the mobile device and software version, 3GPP TS 23.008 chapter 2.2.3
|aud2g.algo|comp128v3|Authentication algorithm ID for GSM AKA, corresponds to enum osmo_auth_algo
|aud2g.ki||Subscriber's secret key (128bit)
|aud3g.algo|milenage|Authentication algorithm ID for UMTS AKA (applies to both 3G and 2G networks), corresponds to enum osmo_auth_algo
|aud3g.k|(32 hexadecimal digits)|Subscriber's secret key (128bit)
|aud3g.op|(32 hexadecimal digits)|Operator's secret key (128bit)
|aud3g.opc|(32 hexadecimal digits)|Secret key derived from OP and K (128bit), alternative to using OP which does not disclose OP to subscribers
|aud3g.sqn|123|Sequence number of last used key (64bit unsigned)
|aud3g.ind_bitlen|5|Nr of index bits at lower SQN end
|apn||
|vlr_number||3GPP TS 23.008 chapter 2.4.5
|hlr_number||3GPP TS 23.008 chapter 2.4.6
|sgsn_number||3GPP TS 23.008 chapter 2.4.8.1
|sgsn_address||3GPP TS 23.008 chapter 2.13.10
|ggsn_number||3GPP TS 23.008 chapter 2.4.8.2
|gmlc_number||3GPP TS 23.008 chapter 2.4.9.2
|smsc_number||3GPP TS 23.008 chapter 2.4.23
|periodic_lu_tmr||3GPP TS 23.008 chapter 2.4.24
|periodic_rau_tau_tmr||3GPP TS 23.008 chapter 2.13.115
|nam_cs|1|Enable/disable voice access (3GPP TS 23.008 chapter 2.1.1.2: network access mode)
|nam_ps|0|Enable/disable data access (3GPP TS 23.008 chapter 2.1.1.2: network access mode)
|lmsi||3GPP TS 23.008 chapter 2.1.8
|ms_purged_cs|0|3GPP TS 23.008 chapter 2.7.5
|ms_purged_ps|1|3GPP TS 23.008 chapter 2.7.6
|===