From 95543427f9c5a5769f2cd2e7a9dbddb8fb95496a Mon Sep 17 00:00:00 2001
From: Stefan Sperling <ssperling@sysmocom.de>
Date: Thu, 11 Jan 2018 17:49:02 +0100
Subject: [PATCH] Implement support for paging based on LAC and CI.

This is a simple combination of the LAC and CI cases which have
already been implemented.

The BSC_Tests.TC_paging_imsi_nochan_lac_ci ttcn3 test passes.

The switch statement in bssmap_handle_paging() is getting a bit large,
and scoping of local variables could be improved. I will focus on
cleaning this up later once paging functionality is complete.

Change-Id: If7f596663a97a1db1a00f115a366f4a5a271c127
Depends: Id83f8b3b1ce80a39417176d99fd09f3b394fd19c
Related: OS#2752
---
 src/osmo-bsc/osmo_bsc_bssap.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/src/osmo-bsc/osmo_bsc_bssap.c b/src/osmo-bsc/osmo_bsc_bssap.c
index 04541c296..189456105 100644
--- a/src/osmo-bsc/osmo_bsc_bssap.c
+++ b/src/osmo-bsc/osmo_bsc_bssap.c
@@ -395,6 +395,30 @@ static int bssmap_handle_paging(struct bsc_msc_data *msc,
 		}
 	}
 
+	case CELL_IDENT_LAC_AND_CI: {
+		uint16_t ci, *ci_be;
+		lacp_be = (uint16_t *)(&data[1]);
+		ci_be = (uint16_t *)(&data[3]);
+		while (remain >= sizeof(*lacp_be) + sizeof(*ci_be)) {
+			lac = osmo_load16be(lacp_be);
+			ci = osmo_load16be(ci_be);
+
+			llist_for_each_entry(bts, &msc->network->bts_list, list) {
+				if (bts->location_area_code != lac)
+					continue;
+				if (bts->cell_identity != ci)
+					continue;
+				if (page_subscriber(msc, bts, tmsi, lac, mi_string, chan_needed) < 0)
+					break;
+			}
+
+			remain -= sizeof(*lacp_be) + sizeof(*ci_be);
+			lacp_be++;
+			ci_be++;
+		}
+		break;
+	}
+
 	case CELL_IDENT_CI: {
 		uint16_t *ci_be = (uint16_t *)(&data[1]);
 		while (remain >= sizeof(*ci_be)) {