tree 701860e1b223a27b1f4f0b887889932751d66823
parent cf02eb1b207a742a55bbd1182e33892626c7b65c
author Jacob Erlbeck <jerlbeck@sysmocom.de> 1401191344 +0200
committer Holger Hans Peter Freyther <holger@moiji-mobile.com> 1406040821 +0200

gprs: Store gbproxy patching state per peer

Currently, all patching state is stored globally in the gbproxy. Thus
the feature cannot be used safely with a concentrating gbproxy (NAT).

This patch moves the state and relevant counters to the gbprox_peer
structure. It adds code to resolve the corresponding peer when
packets are received by looking at BVCI, NSEI, and BSSGP IEs (BVCI,
RAI/LAI/LAC) when the peer is not passed to the
gbprox_patch_bssgp_message() function.

Test cases are also added for the SGSN->BSS case including test cases
with invalid identifiers.

Note that this patch should make it possible to use RAI patching at a
NAT gbproxy as long as the messages are not encrypted.

Ticket: OW#1185
Sponsored-by: On-Waves ehf