IuPS: Change GTP-U endpoint to SGSN in PMM_IDLE and page UE when data arrives
Change-Id: I47b73a40cbdda6b7c31fb2767f74f9f93d84056b
diff --git a/openbsc/src/gprs/gprs_gmm.c b/openbsc/src/gprs/gprs_gmm.c
index cb3d4ee..3d74647 100644
--- a/openbsc/src/gprs/gprs_gmm.c
+++ b/openbsc/src/gprs/gprs_gmm.c
@@ -109,6 +109,16 @@
static int gsm48_gmm_authorize(struct sgsn_mm_ctx *ctx);
+static void mmctx_change_gtpu_endpoints_to_sgsn(struct sgsn_mm_ctx *mm_ctx)
+{
+ struct sgsn_pdp_ctx *pdp;
+ llist_for_each_entry(pdp, &mm_ctx->pdp_list, list) {
+ sgsn_pdp_upd_gtp_u(pdp,
+ &sgsn->cfg.gtp_listenaddr.sin_addr,
+ sizeof(sgsn->cfg.gtp_listenaddr.sin_addr));
+ }
+}
+
void mmctx_set_pmm_state(struct sgsn_mm_ctx *ctx, enum gprs_pmm_state state)
{
if (ctx->pmm_state == state)
@@ -120,7 +130,8 @@
{
switch (state) {
case PMM_IDLE:
- /* TODO: Change GTP-U endpoints to SGSN, start RA Upd timer */
+ /* TODO: start RA Upd timer */
+ mmctx_change_gtpu_endpoints_to_sgsn(ctx);
break;
case PMM_CONNECTED:
break;
diff --git a/openbsc/src/gprs/sgsn_libgtp.c b/openbsc/src/gprs/sgsn_libgtp.c
index 35d5dab..04bd40a 100644
--- a/openbsc/src/gprs/sgsn_libgtp.c
+++ b/openbsc/src/gprs/sgsn_libgtp.c
@@ -401,6 +401,13 @@
return EOF;
}
+void sgsn_pdp_upd_gtp_u(struct sgsn_pdp_ctx *pdp, void *addr, size_t alen)
+{
+ pdp->lib->gsnlu.l = alen;
+ memcpy(pdp->lib->gsnlu.v, addr, alen);
+ gtp_update_context(pdp->ggsn->gsn, pdp->lib, pdp, &pdp->lib->hisaddr0);
+}
+
#ifdef BUILD_IU
/* Callback for RAB assignment response */
int sgsn_ranap_rab_ass_resp(struct sgsn_mm_ctx *ctx, RANAP_RAB_SetupOrModifiedItemIEs_t *setup_ies)
@@ -621,6 +628,18 @@
return -EIO;
}
+ if (mm->ran_type == MM_CTX_T_UTRAN_Iu) {
+#ifdef BUILD_IU
+ /* Ignore the packet for now and page the UE to get the RAB
+ * reestablished */
+ iu_page_ps(mm->imsi, &mm->p_tmsi, mm->ra.lac, mm->ra.rac);
+
+ return 0;
+#else
+ return -ENOTSUP;
+#endif
+ }
+
msg = msgb_alloc_headroom(len+256, 128, "GTP->SNDCP");
ud = msgb_put(msg, len);
memcpy(ud, packet, len);