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-rw-r--r--openbsc/include/openbsc/pcu_if.h3
-rw-r--r--openbsc/src/libbsc/bsc_api.c31
-rw-r--r--openbsc/src/libbsc/pcu_sock.c20
3 files changed, 50 insertions, 4 deletions
diff --git a/openbsc/include/openbsc/pcu_if.h b/openbsc/include/openbsc/pcu_if.h
index 1f398b4aa..2d85a88d7 100644
--- a/openbsc/include/openbsc/pcu_if.h
+++ b/openbsc/include/openbsc/pcu_if.h
@@ -26,6 +26,9 @@ int pcu_tx_imm_ass_sent(struct gsm_bts *bts, uint32_t tlli);
/* Confirm the sending of an immediate assignment to the pcu */
int pcu_tx_imm_ass_sent(struct gsm_bts *bts, uint32_t tlli);
+/* forward data from a RR GPRS SUSPEND REQ towards PCU */
+int pcu_tx_susp_req(struct gsm_lchan *lchan, uint32_t tlli, const uint8_t *ra_id, uint8_t cause);
+
/* Open connection to PCU */
int pcu_sock_init(const char *path, struct gsm_bts *bts);
diff --git a/openbsc/src/libbsc/bsc_api.c b/openbsc/src/libbsc/bsc_api.c
index 7613cac90..a7675fbab 100644
--- a/openbsc/src/libbsc/bsc_api.c
+++ b/openbsc/src/libbsc/bsc_api.c
@@ -2,7 +2,7 @@
/* (C) 2010-2011 by Holger Hans Peter Freyther
* (C) 2010-2011 by On-Waves
- * (C) 2009 by Harald Welte <laforge@gnumonks.org>
+ * (C) 2009-2017 by Harald Welte <laforge@gnumonks.org>
*
* All Rights Reserved
*
@@ -32,11 +32,13 @@
#include <openbsc/debug.h>
#include <openbsc/gsm_04_08.h>
#include <openbsc/trau_mux.h>
+#include <openbsc/pcu_if.h>
#include <osmocom/gsm/protocol/gsm_08_08.h>
#include <osmocom/gsm/gsm48.h>
#include <osmocom/core/talloc.h>
+#include <osmocom/core/byteswap.h>
#define GSM0808_T10_VALUE 6, 0
@@ -570,6 +572,30 @@ static void handle_rr_ho_fail(struct msgb *msg)
/* FIXME: release allocated new channel */
}
+/* TS 44.018 9.1.13b GPRS suspension request */
+static int handle_gprs_susp_req(struct msgb *msg)
+{
+ struct gsm48_hdr *gh = msgb_l3(msg);
+ struct gsm48_gprs_susp_req *gsr;
+ uint32_t tlli;
+ int rc;
+
+ if (!gh || msgb_l3len(msg) < sizeof(*gh)+sizeof(*gsr)) {
+ LOGP(DRSL, LOGL_NOTICE, "%s Short GPRS SUSPEND REQ received, ignoring\n", gsm_lchan_name(msg->lchan));
+ return -EINVAL;
+ }
+
+ gsr = (struct gsm48_gprs_susp_req *) gh->data;
+ tlli = osmo_ntohl(gsr->tlli);
+
+ LOGP(DRSL, LOGL_INFO, "%s Fwd GPRS SUSPEND REQ for TLLI=0x%08x to PCU\n",
+ gsm_lchan_name(msg->lchan), tlli);
+ rc = pcu_tx_susp_req(msg->lchan, tlli, gsr->ra_id, gsr->cause);
+
+ msgb_free(msg);
+
+ return rc;
+}
static void dispatch_dtap(struct gsm_subscriber_connection *conn,
uint8_t link_id, struct msgb *msg)
@@ -599,8 +625,7 @@ static void dispatch_dtap(struct gsm_subscriber_connection *conn,
case GSM48_PDISC_RR:
switch (msg_type) {
case GSM48_MT_RR_GPRS_SUSP_REQ:
- DEBUGP(DRR, "%s\n",
- gsm48_rr_msg_name(GSM48_MT_RR_GPRS_SUSP_REQ));
+ handle_gprs_susp_req(msg);
break;
case GSM48_MT_RR_STATUS:
LOGP(DRR, LOGL_NOTICE, "%s (cause: %s)\n",
diff --git a/openbsc/src/libbsc/pcu_sock.c b/openbsc/src/libbsc/pcu_sock.c
index 98e12fad4..637e4c6a3 100644
--- a/openbsc/src/libbsc/pcu_sock.c
+++ b/openbsc/src/libbsc/pcu_sock.c
@@ -1,6 +1,6 @@
/* pcu_sock.c: Connect from PCU via unix domain socket */
-/* (C) 2008-2010 by Harald Welte <laforge@gnumonks.org>
+/* (C) 2008-2017 by Harald Welte <laforge@gnumonks.org>
* (C) 2009-2012 by Andreas Eversberg <jolly@eversberg.eu>
* (C) 2012 by Holger Hans Peter Freyther
* All Rights Reserved
@@ -307,6 +307,24 @@ int pcu_tx_imm_ass_sent(struct gsm_bts *bts, uint32_t tlli)
return pcu_sock_send(bts, msg);
}
+/* forward data from a RR GPRS SUSPEND REQ towards PCU */
+int pcu_tx_susp_req(struct gsm_lchan *lchan, uint32_t tlli, const uint8_t *ra_id, uint8_t cause)
+{
+ struct gsm_bts *bts = lchan->ts->trx->bts;
+ struct msgb *msg;
+ struct gsm_pcu_if *pcu_prim;
+
+ msg = pcu_msgb_alloc(PCU_IF_MSG_SUSP_REQ, bts->nr);
+ if (!msg)
+ return -ENOMEM;
+ pcu_prim = (struct gsm_pcu_if *) msg->data;
+ pcu_prim->u.susp_req.tlli = tlli;
+ memcpy(pcu_prim->u.susp_req.ra_id, ra_id, sizeof(pcu_prim->u.susp_req.ra_id));
+ pcu_prim->u.susp_req.cause = cause;
+
+ return pcu_sock_send(bts, msg);
+}
+
/* we need to decode the raw RR paging messsage (see PCU code
* Encoding::write_paging_request) and extract the mobile identity
* (P-TMSI) from it */