mirror of
https://gitea.osmocom.org/cellular-infrastructure/osmo-ggsn.git
synced 2025-10-23 00:12:08 +00:00
e99fdbf0db
Allows maintaining, via the VTY, a list of IMSI -> IPv4 address mappings to ensure the GGSN always assigns the same IP address to a UE identified by the IMSI. This is NOT an implenentation of static IP address support, it simply reserves IPs from the dynamic IP pool. No checks are done to enure that the address indeed forms part of the defined pool, this is left up to the operator to configure correctly. It may be desired to always have the same IP address assigned after a PDP context is deleted and recreated by the device, by toggling mobile data, or airplane mode. This could be useful, for example, in order to avoid having to adjust firewall or packet capture filters. One might also have a small subset of IMSIs on a network that should have a special set of firewall rules, for access to internal infrastructure or traffic shaping exemptions, as some examples. This is intented as a developer or small operator feature, but it is not the intention here that one would go about assigning 'static' IP addresses to an entire HLR of subscribers via the GGSN vty.