4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai/************************************************************************
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * RSTP library - Rapid Spanning Tree (802.1t, 802.1w)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * Copyright (C) 2001-2003 Optical Access
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * Author: Alex Rozin
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai *
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * This file is part of RSTP library.
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai *
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * RSTP library is free software; you can redistribute it and/or modify it
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * under the terms of the GNU Lesser General Public License as published by the
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * Free Software Foundation; version 2.1
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai *
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * RSTP library is distributed in the hope that it will be useful, but
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * WITHOUT ANY WARRANTY; without even the implied warranty of
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * General Public License for more details.
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai *
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * You should have received a copy of the GNU Lesser General Public License
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * along with RSTP library; see the file COPYING. If not, write to the Free
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai * 02111-1307, USA.
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai **********************************************************************/
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai/* Port Protocol Migration state machine : 17.26 */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#include "base.h"
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#include "stpm.h"
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define STATES { \
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai CHOOSE(INIT), \
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai CHOOSE(SEND_RSTP), \
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai CHOOSE(SENDING_RSTP), \
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai CHOOSE(SEND_STP), \
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai CHOOSE(SENDING_STP) \
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai}
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define GET_STATE_NAME STP_migrate_get_state_name
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#include "choose.h"
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define MigrateTime 3 /* 17,16.4 */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavaivoid
4eaa471005973e11a6110b69fe990530b3b95a38Rishi SrivatsavaiSTP_migrate_enter_state (STATE_MACH_T* this)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai{
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai register PORT_T* port = this->owner.port;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai switch (this->State) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai case BEGIN:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai case INIT:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai port->initPm = True;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai port->mcheck = False;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai case SEND_RSTP:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai port->mdelayWhile = MigrateTime;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai port->mcheck = port->initPm = False;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai port->sendRSTP = True;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai case SENDING_RSTP:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai port->rcvdRSTP = port->rcvdSTP = False;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai case SEND_STP:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai port->mdelayWhile = MigrateTime;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai port->sendRSTP = False;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai port->initPm = False;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai case SENDING_STP:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai port->rcvdRSTP = port->rcvdSTP = False;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai}
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi SrivatsavaiBool
4eaa471005973e11a6110b69fe990530b3b95a38Rishi SrivatsavaiSTP_migrate_check_conditions (STATE_MACH_T* this)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai{
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai register PORT_T* port = this->owner.port;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai if ((!port->portEnabled && !port->initPm) || BEGIN == this->State)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai return STP_hop_2_state (this, INIT);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai switch (this->State) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai case INIT:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai if (port->portEnabled) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai return STP_hop_2_state (this, (port->owner->ForceVersion >= 2) ?
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai SEND_RSTP : SEND_STP);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai case SEND_RSTP:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai return STP_hop_2_state (this, SENDING_RSTP);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai case SENDING_RSTP:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai if (port->mcheck)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai return STP_hop_2_state (this, SEND_RSTP);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai if (port->mdelayWhile &&
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai (port->rcvdSTP || port->rcvdRSTP)) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai return STP_hop_2_state (this, SENDING_RSTP);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai if (!port->mdelayWhile && port->rcvdSTP) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai return STP_hop_2_state (this, SEND_STP);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai if (port->owner->ForceVersion < 2) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai return STP_hop_2_state (this, SEND_STP);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai case SEND_STP:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai return STP_hop_2_state (this, SENDING_STP);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai case SENDING_STP:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai if (port->mcheck)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai return STP_hop_2_state (this, SEND_RSTP);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai if (port->mdelayWhile &&
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai (port->rcvdSTP || port->rcvdRSTP))
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai return STP_hop_2_state (this, SENDING_STP);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai if (!port->mdelayWhile && port->rcvdRSTP)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai return STP_hop_2_state (this, SEND_RSTP);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai return False;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai}
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai