From e8296d285b34c4397eb0136f97453af44dfc59d4 Mon Sep 17 00:00:00 2001 From: Philipp Maier Date: Thu, 16 Jul 2020 17:02:54 +0200 Subject: gsm_04_08_rr: block EMERGENCY SETUP when EMERGENCY CALLS are denied If the BSC configuration is set up to deny emergency calls, make sure that an EMERGENCY SETUP will not be passed to the MSC, instead ensure that the call is released. Change-Id: Ia6eb38370ce4165d221d2ffbe1cd105c0628313c Related: OS#4548 --- src/osmo-bsc/gsm_04_08_rr.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'src/osmo-bsc/gsm_04_08_rr.c') diff --git a/src/osmo-bsc/gsm_04_08_rr.c b/src/osmo-bsc/gsm_04_08_rr.c index e54a93719..8bf4b2aad 100644 --- a/src/osmo-bsc/gsm_04_08_rr.c +++ b/src/osmo-bsc/gsm_04_08_rr.c @@ -43,6 +43,7 @@ #include #include #include +#include #include #include @@ -988,6 +989,24 @@ static void dispatch_dtap(struct gsm_subscriber_connection *conn, break; } break; + case GSM48_PDISC_CC: + /* Make sure that EMERGENCY CALLS can not be made if the + * VTY configuration does not permit. */ + if (msg_type == GSM48_MT_CC_EMERG_SETUP) { + if (msg->lchan->ts->trx->bts->si_common.rach_control.t2 & 0x4) { + LOG_LCHAN(msg->lchan, LOGL_NOTICE, "MS attempts EMERGENCY SETUP although EMERGENCY CALLS" + " are not allowed in sysinfo (spec violation by MS!)\n"); + lchan_release(msg->lchan, true, true, GSM48_RR_CAUSE_PREMPTIVE_REL); + break; + } + if (!conn->sccp.msc->allow_emerg) { + LOG_LCHAN(msg->lchan, LOGL_NOTICE, "MS attempts EMERGENCY SETUP, but EMERGENCY CALLS are" + " denied on this BSC (check BTS config!)\n"); + lchan_release(msg->lchan, true, true, GSM48_RR_CAUSE_PREMPTIVE_REL); + break; + } + } + /* fall through */ default: bsc_dtap(conn, link_id, msg); break; -- cgit v1.2.3