ms: Get the set of slots currently active

This commits adds methods to GprsMs and gprs_rlcmac_tbf to retrieve
the slots that are actively used.

Sponsored-by: On-Waves ehf

src/gprs_ms.cpp

@@ -538,6 +538,32 @@ int GprsMs::first_common_ts() const
 	return -1;
 }
 
+uint8_t GprsMs::dl_slots() const
+{
+	uint8_t slots = 0;
+
+	if (m_dl_tbf)
+		slots |= m_dl_tbf->dl_slots();
+
+	if (m_ul_tbf)
+		slots |= m_ul_tbf->dl_slots();
+
+	return slots;
+}
+
+uint8_t GprsMs::ul_slots() const
+{
+	uint8_t slots = 0;
+
+	if (m_dl_tbf)
+		slots |= m_dl_tbf->ul_slots();
+
+	if (m_ul_tbf)
+		slots |= m_ul_tbf->ul_slots();
+
+	return slots;
+}
+
 void GprsMs::set_reserved_slots(gprs_rlcmac_trx *trx,
 	uint8_t ul_slots, uint8_t dl_slots)
 {

src/gprs_ms.h

@@ -80,6 +80,8 @@ public:
 	uint8_t current_cs_dl() const;
 
 	int first_common_ts() const;
+	uint8_t dl_slots() const;
+	uint8_t ul_slots() const;
 	uint8_t reserved_dl_slots() const;
 	uint8_t reserved_ul_slots() const;
 	gprs_rlcmac_trx *current_trx() const;

src/tbf.cpp

@@ -935,6 +935,42 @@ uint8_t gprs_rlcmac_tbf::tsc() const
 	return trx->pdch[first_ts].tsc;
 }
 
+uint8_t gprs_rlcmac_tbf::dl_slots() const
+{
+	uint8_t slots = 0;
+	size_t i;
+
+	if (direction == GPRS_RLCMAC_UL_TBF)
+		return 0;
+
+	for (i = 0; i < ARRAY_SIZE(pdch); i += 1)
+		if (pdch[i])
+			slots |= 1 << i;
+
+	return slots;
+}
+
+uint8_t gprs_rlcmac_tbf::ul_slots() const
+{
+	uint8_t slots = 0;
+	size_t i;
+
+	if (direction == GPRS_RLCMAC_DL_TBF) {
+		if (control_ts < 8)
+			slots |= 1 << control_ts;
+		if (first_common_ts < 8)
+			slots |= 1 << first_common_ts;
+
+		return slots;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(pdch); i += 1)
+		if (pdch[i])
+			slots |= 1 << i;
+
+	return slots;
+}
+
 void tbf_print_vty_info(struct vty *vty, struct llist_head *ltbf)
 {
 	gprs_rlcmac_tbf *tbf = llist_pods_entry(ltbf, gprs_rlcmac_tbf);

src/tbf.h

@@ -158,6 +158,8 @@ struct gprs_rlcmac_tbf {
 	const gprs_llc_queue *llc_queue() const;
 
 	time_t created_ts() const;
+	uint8_t dl_slots() const;
+	uint8_t ul_slots() const;
 
 	/* attempt to make things a bit more fair */
 	void rotate_in_list();