introduce trans_lchan_change() to update transaction about lchan change

2 files changed, 24 insertions, 0 deletions

diff --git a/openbsc/include/openbsc/transaction.h b/openbsc/include/openbsc/transaction.h
index 961a64923..6314f987f 100644
--- a/openbsc/include/openbsc/transaction.h
+++ b/openbsc/include/openbsc/transaction.h
@@ -65,4 +65,9 @@ void trans_free(struct gsm_trans *trans);
 
 int trans_assign_trans_id(struct gsm_subscriber *subscr,
 			  u_int8_t protocol, u_int8_t ti_flag);
+
+/* update all transactions to use a different LCHAN, e.g.
+ * after handover has succeeded */
+int trans_lchan_change(struct gsm_lchan *lchan_old,
+		       struct gsm_lchan *lchan_new);
 #endif
diff --git a/openbsc/src/transaction.c b/openbsc/src/transaction.c
index 04eaa3c99..9f1bbf36d 100644
--- a/openbsc/src/transaction.c
+++ b/openbsc/src/transaction.c
@@ -140,3 +140,22 @@ int trans_assign_trans_id(struct gsm_subscriber *subscr,
 
 	return -1;
 }
+
+/* update all transactions to use a different LCHAN, e.g.
+ * after handover has succeeded */
+int trans_lchan_change(struct gsm_lchan *lchan_old,
+		       struct gsm_lchan *lchan_new)
+{
+	struct gsm_network *net = lchan_old->ts->trx->bts->network;
+	struct gsm_trans *trans;
+	int num = 0;
+
+	llist_for_each_entry(trans, &net->trans_list, entry) {
+		if (trans->lchan == lchan_old) {
+			trans->lchan = lchan_new;
+			num++;
+		}
+	}
+
+	return num;
+}