Add function to update TRAU muxer after assignment or handover

E1 based BTS use TRAU muxer to decode TRAU frames. After changing
channel from one timeslot to another (due to handover or assignment),
the TRAU muxer must be updated. The call reference of the call is
disconnected from the old channel and connected to the new channel.

2 files changed, 17 insertions, 0 deletions

diff --git a/openbsc/include/openbsc/gsm_data.h b/openbsc/include/openbsc/gsm_data.h
index 7c3ca8497..41fe3281f 100644
--- a/openbsc/include/openbsc/gsm_data.h
+++ b/openbsc/include/openbsc/gsm_data.h
@@ -382,6 +382,20 @@ static inline int is_nokia_bts(struct gsm_bts *bts)
 	return 0;
 }
 
+static inline int is_e1_bts(struct gsm_bts *bts)
+{
+	switch (bts->type) {
+	case GSM_BTS_TYPE_BS11:
+	case GSM_BTS_TYPE_RBS2000:
+	case GSM_BTS_TYPE_NOKIA_SITE:
+		return 1;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
 enum gsm_auth_policy gsm_auth_policy_parse(const char *arg);
 const char *gsm_auth_policy_name(enum gsm_auth_policy policy);
 
diff --git a/openbsc/include/openbsc/trau_mux.h b/openbsc/include/openbsc/trau_mux.h
index 3de50f772..d211d8d74 100644
--- a/openbsc/include/openbsc/trau_mux.h
+++ b/openbsc/include/openbsc/trau_mux.h
@@ -51,6 +51,9 @@ int trau_recv_lchan(struct gsm_lchan *lchan, uint32_t callref);
 /* send trau from application */
 int trau_send_frame(struct gsm_lchan *lchan, struct gsm_data_frame *frame);
 
+/* switch trau muxer to new lchan */
+int switch_trau_mux(struct gsm_lchan *old_lchan, struct gsm_lchan *new_lchan);
+
 /* callback invoked if we receive TRAU frames */
 int subch_cb(struct subch_demux *dmx, int ch, uint8_t *data, int len, void *_priv);