1 files changed, 38 insertions, 0 deletions
diff --git a/isisd/isis_csm.h b/isisd/isis_csm.h
new file mode 100644
index 0000000..80e02b8
--- /dev/null
+++ b/isisd/isis_csm.h
@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * IS-IS Rout(e)ing protocol - isis_csm.h
+ *                             IS-IS circuit state machine
+ *
+ * Copyright (C) 2001,2002   Sampo Saaristo
+ *                           Tampere University of Technology
+ *                           Institute of Communications Engineering
+ *
+ */
+#ifndef _ZEBRA_ISIS_CSM_H
+#define _ZEBRA_ISIS_CSM_H
+
+/*
+ * Circuit states
+ */
+enum isis_circuit_state {
+	C_STATE_NA,
+	C_STATE_INIT, /* Connected to interface */
+	C_STATE_CONF, /* Configured for ISIS    */
+	C_STATE_UP,   /* CONN | CONF            */
+};
+
+/*
+ * Circuit events
+ */
+enum isis_circuit_event {
+	ISIS_ENABLE = 1,
+	IF_UP_FROM_Z,
+	ISIS_DISABLE,
+	IF_DOWN_FROM_Z,
+};
+
+struct isis_circuit *isis_csm_state_change(enum isis_circuit_event event,
+					   struct isis_circuit *circuit,
+					   void *arg);
+
+#endif /* _ZEBRA_ISIS_CSM_H */