tree e911fae9a0ac8b1f950d0f211e0020b72e2db833
parent 643d5228edd71f50a2ebb27854a4d5f3ff3b2835
author Jacob Erlbeck <jerlbeck@sysmocom.de> 1407777144 +0200
committer Holger Hans Peter Freyther <holger@moiji-mobile.com> 1408889800 +0200

gbproxy: Use different TLLI/P-TMSI for BSS and SGSN

This patch modifies gbprox_make_bss_ptmsi() to generate a new P-TMSI
when patch_ptmsi is set in the configuration instead of using the
P-TMSI assigned by the SGSN. It modifies gbprox_make_sgsn_tlli() to
either use a foreign TLLI based on the SGSN side P-TMSI or (if there
is none) generate a random TLLI if patch_ptmsi is set. Otherwise, the
TLLI used by the BSS is used.

The seeds for the pseudo-random sequences sre set based on time
initially. Note that these are neither cryptographically safe nor
protected against collisions.

Ticket: OW#1259
Sponsored-by: On-Waves ehf