Change in ...osmo-sgsn[master]: sgsn: when receiving data PDU notify the Gb GMM fsm

[lynxis lazus]

lynxis lazus has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-sgsn/+/15535


Change subject: sgsn: when receiving data PDU notify the Gb GMM fsm
......................................................................

sgsn: when receiving data PDU notify the Gb GMM fsm

When receiving a PDU, the GMM fsm will change to state MM_READY
and will re-arm the T3314

Change-Id: I78f40762fb17bbd4a6f35608a793f8e5271e9b86
---
M include/osmocom/sgsn/gprs_gb.h
M src/sgsn/gprs_gb.c
M src/sgsn/gprs_sndcp.c
3 files changed, 16 insertions(+), 2 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-sgsn refs/changes/35/15535/1

diff --git a/include/osmocom/sgsn/gprs_gb.h b/include/osmocom/sgsn/gprs_gb.h
index 3bc3676..47f2a31 100644
--- a/include/osmocom/sgsn/gprs_gb.h
+++ b/include/osmocom/sgsn/gprs_gb.h
@@ -3,7 +3,9 @@
 #include <stdbool.h>
 
 #include <osmocom/core/msgb.h>
-#include <osmocom/sgsn/gprs_rllc.h>
+#include <osmocom/sgsn/gprs_llc.h>
 
 int gsm0408_gprs_rcvmsg_gb(struct msgb *msg, struct gprs_llc_llme *llme,
 			   bool drop_cipherable);
+/* Has to be called whenever any PDU (signaling, data, ...) has been received */
+void gprs_gb_recv_pdu(struct sgsn_mm_ctx *mmctx);
diff --git a/src/sgsn/gprs_gb.c b/src/sgsn/gprs_gb.c
index 2d9c25a..a0c6fc3 100644
--- a/src/sgsn/gprs_gb.c
+++ b/src/sgsn/gprs_gb.c
@@ -34,6 +34,11 @@
 #include <osmocom/sgsn/gprs_sm.h>
 #include <osmocom/sgsn/debug.h>
 
+void gprs_gb_recv_pdu(struct sgsn_mm_ctx *mmctx) {
+	if (mmctx->gb.llme)
+		osmo_fsm_inst_dispatch(mmctx->gb.mm_state_fsm, E_MM_PDU_RECEPTION, NULL);
+}
+
 /* Main entry point for incoming 04.08 GPRS messages from Gb */
 int gsm0408_gprs_rcvmsg_gb(struct msgb *msg, struct gprs_llc_llme *llme,
 			   bool drop_cipherable)
@@ -50,7 +55,7 @@
 		msgid2mmctx(mmctx, msg);
 		rate_ctr_inc(&mmctx->ctrg->ctr[GMM_CTR_PKTS_SIG_IN]);
 		mmctx->gb.llme = llme;
-		osmo_fsm_inst_dispatch(mmctx->gb.mm_state_fsm, E_MM_PDU_RECEPTION, NULL);
+		gprs_gb_recv_pdu(mmctx);
 	}
 
 	/* MMCTX can be NULL */
diff --git a/src/sgsn/gprs_sndcp.c b/src/sgsn/gprs_sndcp.c
index d9aa1e5..5ef7a12 100644
--- a/src/sgsn/gprs_sndcp.c
+++ b/src/sgsn/gprs_sndcp.c
@@ -31,6 +31,7 @@
 #include <osmocom/gprs/gprs_bssgp.h>
 
 #include <osmocom/sgsn/debug.h>
+#include <osmocom/sgsn/gprs_gb.h>
 #include <osmocom/sgsn/gprs_llc.h>
 #include <osmocom/sgsn/sgsn.h>
 #include <osmocom/sgsn/gprs_sndcp.h>
@@ -745,6 +746,7 @@
 	struct sndcp_common_hdr *sch = (struct sndcp_common_hdr *)hdr;
 	struct sndcp_comp_hdr *scomph = NULL;
 	struct sndcp_udata_hdr *suh;
+	struct sgsn_mm_ctx *mmctx;
 	uint8_t *npdu;
 	uint16_t npdu_num __attribute__((unused));
 	int npdu_len;
@@ -778,6 +780,11 @@
 	/* FIXME: move this RA_ID up to the LLME or even higher */
 	bssgp_parse_cell_id(&sne->ra_id, msgb_bcid(msg));
 
+	/* We should only receive data packages for a valid MM */
+	mmctx = sgsn_mm_ctx_by_tlli(msgb_tlli(msg), &sne->ra_id);
+	OSMO_ASSERT(mmctx);
+	gprs_gb_recv_pdu(mmctx);
+
 	if (scomph) {
 		sne->defrag.pcomp = scomph->pcomp;
 		sne->defrag.dcomp = scomph->dcomp;

-- 
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Gerrit-Project: osmo-sgsn
Gerrit-Branch: master
Gerrit-Change-Id: I78f40762fb17bbd4a6f35608a793f8e5271e9b86
Gerrit-Change-Number: 15535
Gerrit-PatchSet: 1
Gerrit-Owner: lynxis lazus <lynxis at fe80.eu>
Gerrit-MessageType: newchange
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