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-rw-r--r--src/gprs/gprs_gmm.c26
1 files changed, 25 insertions, 1 deletions
diff --git a/src/gprs/gprs_gmm.c b/src/gprs/gprs_gmm.c
index 358bff9..a18a54e 100644
--- a/src/gprs/gprs_gmm.c
+++ b/src/gprs/gprs_gmm.c
@@ -1616,6 +1616,19 @@ static void process_ms_ctx_status(struct sgsn_mm_ctx *mmctx,
}
}
+/* 3GPP TS 24.008 Section 4.7.13.4 Service request procedure not accepted by the
+ * network. Returns true if MS has active PDP contexts in pdp_status */
+bool pdp_status_has_active_nsapis(const uint8_t *pdp_status, const size_t pdp_status_len)
+{
+ size_t i;
+
+ for (i = 0; i < pdp_status_len; i++)
+ if (pdp_status[i] != 0)
+ return true;
+
+ return false;
+}
+
/* Chapter 9.4.14: Routing area update request */
static int gsm48_rx_gmm_ra_upd_req(struct sgsn_mm_ctx *mmctx, struct msgb *msg,
struct gprs_llc_llme *llme)
@@ -1896,12 +1909,23 @@ static int gsm48_rx_gmm_service_req(struct sgsn_mm_ctx *ctx, struct msgb *msg)
ctx->iu.service.type = service_type;
- /* TODO: Handle those only in case of accept? */
/* Look at PDP Context Status IE and see if MS's view of
* activated/deactivated NSAPIs agrees with our view */
if (TLVP_PRESENT(&tp, GSM48_IE_GMM_PDP_CTX_STATUS)) {
const uint8_t *pdp_status = TLVP_VAL(&tp, GSM48_IE_GMM_PDP_CTX_STATUS);
+ const size_t pdp_status_len = TLVP_LEN(&tp, GSM48_IE_GMM_PDP_CTX_STATUS);
+
process_ms_ctx_status(ctx, pdp_status);
+
+ /* 3GPP TS 24.008 Section 4.7.13.4 Service request procedure not
+ * accepted by the network. Cause #40. If MS has PDP Contexts in
+ * Active state in pdp_status but there is no PDP contexts on
+ * SGSN side then Reject with the cause will force the mobile to
+ * reset PDP contexts */
+ if (llist_empty(&ctx->pdp_list) && pdp_status_has_active_nsapis(pdp_status, pdp_status_len)) {
+ reject_cause = GMM_CAUSE_NO_PDP_ACTIVATED;
+ goto rejected;
+ }
}