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authorHarald Welte <laforge@gnumonks.org>2017-07-11 00:06:38 +0200
committerHarald Welte <laforge@gnumonks.org>2019-01-21 18:58:12 +0100
commitf9cb6d713a0de22814630be2fdea20dc64049695 (patch)
treeb3c3e779687299180b208baca53ebcec917796bc
parent5b521891baa7752b99fc630fdd19a694dd91aab8 (diff)
Forward GPRS SUSPEND REQ from BTS to SGSN using BSSGPlaforge/gprs-suspend
As specified in 3GPP TS 03.60 Section 16.2.1 and 44.018 Section 3.4.15, a Class B MS is sending a "RR GPRS SUSPEND REQ" via a DCCH to the BTS if it wants to suspend GPRS services. As of Change-Id I3c1af662c8f0d3d22da200638480f6ef05c3ed1f, OsmoBTS forwards this via the PCU socket, so we need to pick it up and send it via BSSGP to the SGSN. Change-Id: I7b4beb413a6f974373a404b5a11c44d86ba695d3 Closes: OS#2249
-rw-r--r--include/osmocom/pcu/pcuif_proto.h9
-rw-r--r--src/pcu_l1_if.cpp18
2 files changed, 27 insertions, 0 deletions
diff --git a/include/osmocom/pcu/pcuif_proto.h b/include/osmocom/pcu/pcuif_proto.h
index b06077c..144fba6 100644
--- a/include/osmocom/pcu/pcuif_proto.h
+++ b/include/osmocom/pcu/pcuif_proto.h
@@ -12,6 +12,7 @@
#define PCU_IF_MSG_DATA_REQ 0x00 /* send data to given channel */
#define PCU_IF_MSG_DATA_CNF 0x01 /* confirm (e.g. transmission on PCH) */
#define PCU_IF_MSG_DATA_IND 0x02 /* receive data from given channel */
+#define PCU_IF_MSG_SUSP_REQ 0x03 /* BTS forwards GPRS SUSP REQ to PCU */
#define PCU_IF_MSG_RTS_REQ 0x10 /* ready to send request */
#define PCU_IF_MSG_DATA_CNF_DT 0x11 /* confirm (with direct tlli) */
#define PCU_IF_MSG_RACH_IND 0x22 /* receive RACH */
@@ -171,6 +172,13 @@ struct gsm_pcu_if_pag_req {
uint8_t identity_lv[9];
} __attribute__ ((packed));
+/* BTS tells PCU about a GPRS SUSPENSION REQUEST received on DCCH */
+struct gsm_pcu_if_susp_req {
+ uint32_t tlli;
+ uint8_t ra_id[6];
+ uint8_t cause;
+} __attribute__ ((packed));
+
struct gsm_pcu_if {
/* context based information */
uint8_t msg_type; /* message type */
@@ -182,6 +190,7 @@ struct gsm_pcu_if {
struct gsm_pcu_if_data data_cnf;
struct gsm_pcu_if_data_cnf_dt data_cnf_dt;
struct gsm_pcu_if_data data_ind;
+ struct gsm_pcu_if_susp_req susp_req;
struct gsm_pcu_if_rts_req rts_req;
struct gsm_pcu_if_rach_ind rach_ind;
struct gsm_pcu_if_txt_ind txt_ind;
diff --git a/src/pcu_l1_if.cpp b/src/pcu_l1_if.cpp
index 27e86dd..90429ac 100644
--- a/src/pcu_l1_if.cpp
+++ b/src/pcu_l1_if.cpp
@@ -605,6 +605,21 @@ static int pcu_rx_pag_req(struct gsm_pcu_if_pag_req *pag_req)
pag_req->identity_lv);
}
+static int pcu_rx_susp_req(struct gsm_pcu_if_susp_req *susp_req)
+{
+ struct bssgp_bvc_ctx *bctx = gprs_bssgp_pcu_current_bctx();
+ struct gprs_ra_id ra_id;
+
+ gsm48_parse_ra(&ra_id, susp_req->ra_id);
+
+ LOGP(DL1IF, LOGL_DEBUG, "GPRS Suspent request received: tlli=0x%08x\n", susp_req->tlli);
+
+ if (!bctx)
+ return -1;
+
+ return bssgp_tx_suspend(bctx->nsei, susp_req->tlli, &ra_id);
+}
+
int pcu_rx(uint8_t msg_type, struct gsm_pcu_if *pcu_prim)
{
int rc = 0;
@@ -631,6 +646,9 @@ int pcu_rx(uint8_t msg_type, struct gsm_pcu_if *pcu_prim)
case PCU_IF_MSG_PAG_REQ:
rc = pcu_rx_pag_req(&pcu_prim->u.pag_req);
break;
+ case PCU_IF_MSG_SUSP_REQ:
+ rc = pcu_rx_susp_req(&pcu_prim->u.susp_req);
+ break;
default:
LOGP(DL1IF, LOGL_ERROR, "Received unknwon PCU msg type %d\n",
msg_type);