gbproxy: Parse RA_UPD_REJ and invalidate TLLI
Since this message puts the MS into DEREGISTERED state (like a detach
procedure), this message is parsed and the invalidate_tlli field is
set accordingly.
Sponsored-by: On-Waves ehf
diff --git a/openbsc/src/gprs/gprs_gb_parse.c b/openbsc/src/gprs/gprs_gb_parse.c
index adc07ff..2baaa06 100644
--- a/openbsc/src/gprs/gprs_gb_parse.c
+++ b/openbsc/src/gprs/gprs_gb_parse.c
@@ -279,6 +279,36 @@
return 1;
}
+static int gprs_gb_parse_gmm_ra_upd_rej(uint8_t *data, size_t data_len,
+ struct gprs_gb_parse_context *parse_ctx)
+{
+ uint8_t *value;
+ uint8_t cause;
+ int force_standby;
+
+ parse_ctx->llc_msg_name = "RA_UPD_REJ";
+
+ /* GMM cause */
+ if (v_fixed_shift(&data, &data_len, 1, &value) <= 0)
+ return 0;
+
+ cause = value[0];
+
+ /* Force to standby, 1/2 */
+ /* spare bits, 1/2 */
+ if (v_fixed_shift(&data, &data_len, 1, &value) <= 0)
+ return 0;
+
+ force_standby = (value[0] & 0x07) == 0x01;
+
+ if (cause == GMM_CAUSE_IMPL_DETACHED && !force_standby)
+ parse_ctx->await_reattach = 1;
+
+ parse_ctx->invalidate_tlli = 1;
+
+ return 1;
+}
+
static int gprs_gb_parse_gmm_ra_upd_ack(uint8_t *data, size_t data_len,
struct gprs_gb_parse_context *parse_ctx)
{
@@ -418,6 +448,9 @@
case GSM48_MT_GMM_RA_UPD_REQ:
return gprs_gb_parse_gmm_ra_upd_req(data, data_len, parse_ctx);
+ case GSM48_MT_GMM_RA_UPD_REJ:
+ return gprs_gb_parse_gmm_ra_upd_rej(data, data_len, parse_ctx);
+
case GSM48_MT_GMM_RA_UPD_ACK:
return gprs_gb_parse_gmm_ra_upd_ack(data, data_len, parse_ctx);