From 83cf10c8a61e96294692ce253098cd65cedda8ba Mon Sep 17 00:00:00 2001
From: Neels Hofmeyr <neels@hofmeyr.de>
Date: Wed, 24 Jun 2020 14:23:26 +0200
Subject: [PATCH] propagate Compl L3 Info Cell ID to the VLR subscriber record

As soon as the subscriber is authenticated, update the VLR entry with the
MSC-A's full CGI, including the Cell Id received from the Complete Layer 3
Information.

Thus the Cell Id will be shown by vty 'show subscriber cache' and 'show
connection'.

This is tested by osmo-ttcn3-hacks Ie410714a96353f74a52a104c56fa0a08683e0004.

Related: OS#4627
Change-Id: Iee1781985fb25b21ce27526c6a3768bf70d4dc9a
---
 src/libmsc/msc_a.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/libmsc/msc_a.c b/src/libmsc/msc_a.c
index fd66ad3fd..76c0f0194 100644
--- a/src/libmsc/msc_a.c
+++ b/src/libmsc/msc_a.c
@@ -138,6 +138,12 @@ static void evaluate_acceptance_outcome(struct osmo_fsm_inst *fi, bool conn_acce
 
 	update_counters(fi, conn_accepted);
 
+	if (conn_accepted) {
+		/* Record the Cell ID seen in Complete Layer 3 Information in the VLR, so that it also shows in vty
+		 * 'show' output. */
+		vsub->cgi = msc_a->via_cell;
+	}
+
 	/* Trigger transactions that we paged for */
 	if (msc_a->complete_layer3_type == COMPLETE_LAYER3_PAGING_RESP) {
 		if (conn_accepted)