tree c9044a4bf3ce649f54ca196029a93a9921808646
parent d038361e95f5247d10f14d4337f1fb001a247bb6
author Vadim Yanitskiy <vyanitskiy@sysmocom.de> 1602284405 +0700
committer Vadim Yanitskiy <vyanitskiy@sysmocom.de> 1602285371 +0700

gprs_bssgp_pcu: fix: do not crash on receipt of subsequent INFO.ind

It's expected to receive subsequent INFO.ind messages at run-time,
e.g. when a dynamic TCH/F_TCH/H_PDCH timeslot is switched from
PDCH to TCH/F or TCH/H, osmo-bts would send us INFO.ind with the
updated PDCH slot-mask indicating that this timeslot is disabled.

In gprs_nsvc_create_and_connect(), do not bind() on the received
NSVC address unconditionally - we may already be bound to it.
Instead, return early and keep everything unchanged.

I don't know how the PCU is supposed to handle NSVC address change,
at least the new NS2 library does not handle this internally, nor
it provides any API for that.  Let's leave it for later.

Change-Id: I159138e41e147cd30212da548b0ccd3f81d61b4e
Related: I4c3bc883d795e5d1ee5ab175ac03684924692a7c
Fixes: Ib389925cf5c9f18951af6242c31ea70476218e9a
Related: SYS#5108