1 files changed, 140 insertions, 0 deletions
diff --git a/usr/src/lib/librstp/common/sttrans.c b/usr/src/lib/librstp/common/sttrans.c
new file mode 100644
index 0000000000..e1754b2b8e
--- /dev/null
+++ b/usr/src/lib/librstp/common/sttrans.c
@@ -0,0 +1,140 @@
+/************************************************************************ 
+ * RSTP library - Rapid Spanning Tree (802.1t, 802.1w) 
+ * Copyright (C) 2001-2003 Optical Access 
+ * Author: Alex Rozin 
+ * 
+ * This file is part of RSTP library. 
+ * 
+ * RSTP library is free software; you can redistribute it and/or modify it 
+ * under the terms of the GNU Lesser General Public License as published by the 
+ * Free Software Foundation; version 2.1 
+ * 
+ * RSTP library is distributed in the hope that it will be useful, but 
+ * WITHOUT ANY WARRANTY; without even the implied warranty of 
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser 
+ * General Public License for more details. 
+ * 
+ * You should have received a copy of the GNU Lesser General Public License 
+ * along with RSTP library; see the file COPYING.  If not, write to the Free 
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 
+ * 02111-1307, USA. 
+ **********************************************************************/
+
+/* Port State Transition state machine : 17.24 */
+    
+#include "base.h"
+#include "stpm.h"
+#include "stp_to.h"
+
+#define STATES { \
+  CHOOSE(DISCARDING),   \
+  CHOOSE(LEARNING), \
+  CHOOSE(FORWARDING)   \
+}
+
+#define GET_STATE_NAME STP_sttrans_get_state_name
+#include "choose.h"
+
+
+#ifdef STRONGLY_SPEC_802_1W
+static Bool
+disableLearning (STATE_MACH_T *this)
+{
+  register PORT_T *port = this->owner.port;
+
+  return STP_OUT_set_learning (port->port_index, port->owner->vlan_id, False);
+}
+
+static Bool
+enableLearning (STATE_MACH_T *this)
+{
+  register PORT_T *port = this->owner.port;
+
+  return STP_OUT_set_learning (port->port_index, port->owner->vlan_id, True);
+}
+
+static Bool
+disableForwarding (STATE_MACH_T *this)
+{
+  register PORT_T *port = this->owner.port;
+
+  return STP_OUT_set_forwarding (port->port_index, port->owner->vlan_id, False);
+}
+
+static Bool
+enableForwarding (STATE_MACH_T *this)
+{
+  register PORT_T *port = this->owner.port;
+
+  return STP_OUT_set_forwarding (port->port_index, port->owner->vlan_id, True);
+}
+#endif
+
+void
+STP_sttrans_enter_state (STATE_MACH_T *this)
+{
+  register PORT_T    *port = this->owner.port;
+
+  switch (this->State) {
+    case BEGIN:
+    case DISCARDING:
+      port->learning = False;
+      port->forwarding = False;
+#ifdef STRONGLY_SPEC_802_1W
+      disableLearning (this);
+      disableForwarding (this);
+#else
+      STP_OUT_set_port_state (port->port_index, port->owner->vlan_id, UID_PORT_DISCARDING);
+#endif
+      break;
+    case LEARNING:
+      port->learning = True;
+#ifdef STRONGLY_SPEC_802_1W
+      enableLearning (this);
+#else
+      STP_OUT_set_port_state (port->port_index, port->owner->vlan_id, UID_PORT_LEARNING);
+#endif
+      break;
+    case FORWARDING:
+      port->tc = !port->operEdge;
+      port->forwarding = True;
+#ifdef STRONGLY_SPEC_802_1W
+      enableForwarding (this);
+#else
+      STP_OUT_set_port_state (port->port_index, port->owner->vlan_id, UID_PORT_FORWARDING);
+#endif
+      break;
+  }
+
+}
+
+Bool
+STP_sttrans_check_conditions (STATE_MACH_T *this)
+{
+  register PORT_T       *port = this->owner.port;
+
+  switch (this->State) {
+    case BEGIN:
+      return STP_hop_2_state (this, DISCARDING);
+    case DISCARDING:
+      if (port->learn) {
+        return STP_hop_2_state (this, LEARNING);
+      }
+      break;
+    case LEARNING:
+      if (port->forward) {
+        return STP_hop_2_state (this, FORWARDING);
+      }
+      if (!port->learn) {
+        return STP_hop_2_state (this, DISCARDING);
+      }
+      break;
+    case FORWARDING:
+      if (!port->forward) {
+        return STP_hop_2_state (this, DISCARDING);
+      }
+      break;
+  }
+
+  return False;
+}