librstp/common/portinfo.c

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#include "base.h"
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#include "stpm.h"
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#include "stp_vectors.h"
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai/* The Port Information State Machine : 17.21 */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define STATES { \
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  CHOOSE(DISABLED), \
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  CHOOSE(ENABLED),  \
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  CHOOSE(AGED),     \
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  CHOOSE(UPDATE),   \
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  CHOOSE(CURRENT),  \
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  CHOOSE(RECEIVE),  \
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  CHOOSE(SUPERIOR), \
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  CHOOSE(REPEAT),   \
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  CHOOSE(AGREEMENT)    \
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai}
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#define GET_STATE_NAME STP_info_get_state_name
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#include "choose.h"
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#if 0 /* for debug */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavaivoid
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai_stp_dump (char* title, unsigned char* buff, int len)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai{
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  register int iii;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  stp_trace ("\n%s:", title);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  for (iii = 0; iii < len; iii++) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    if (! (iii % 24)) stp_trace ("\n%6d:", iii);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    if (! (iii % 8)) stp_trace (" ");
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    stp_trace ("%02lx", (unsigned long) buff[iii]);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  stp_trace ("\n");
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai}
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#endif
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavaistatic RCVD_MSG_T
4eaa471005973e11a6110b69fe990530b3b95a38Rishi SrivatsavaircvBpdu (STATE_MACH_T* this)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai{/* 17.19.8 */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  int   bridcmp;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  register PORT_T* port = this->owner.port;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  if (port->msgBpduType == BPDU_TOPO_CHANGE_TYPE) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#ifdef STP_DBG
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    if (this->debug) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        stp_trace ("%s", "rcvBpdu: OtherMsg:BPDU_TOPO_CHANGE_TYPE");
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#endif
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    return OtherMsg;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  port->msgPortRole = RSTP_PORT_ROLE_UNKN;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  if (BPDU_RSTP == port->msgBpduType) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    port->msgPortRole = (port->msgFlags & PORT_ROLE_MASK) >> PORT_ROLE_OFFS;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  if (RSTP_PORT_ROLE_DESGN == port->msgPortRole ||
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      BPDU_CONFIG_TYPE == port->msgBpduType) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    bridcmp = STP_VECT_compare_vector (&port->msgPrio, &port->portPrio);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    if (bridcmp < 0 ||
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        (! STP_VECT_compare_bridge_id (&port->msgPrio.design_bridge,
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai                                       &port->portPrio.design_bridge) &&
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai         port->msgPrio.design_port == port->portPrio.design_port      &&
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai         STP_compare_times (&port->msgTimes, &port->portTimes))) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#ifdef STP_DBG
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai         if (this->debug) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai           stp_trace ("rcvBpdu: SuperiorDesignateMsg:bridcmp=%d", (int) bridcmp);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai         }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#endif
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      return SuperiorDesignateMsg;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  if (BPDU_CONFIG_TYPE == port->msgBpduType ||
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      RSTP_PORT_ROLE_DESGN == port->msgPortRole) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    if (! STP_VECT_compare_vector (&port->msgPrio,
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai                                   &port->portPrio) &&
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        ! STP_compare_times (&port->msgTimes, &port->portTimes)) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#ifdef STP_DBG
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        if (this->debug) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai          stp_trace ("%s", "rcvBpdu: RepeatedDesignateMsg");
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#endif
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        return RepeatedDesignateMsg;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  if (RSTP_PORT_ROLE_ROOT == port->msgBpduType                    &&
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->operPointToPointMac                                   &&
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      ! STP_VECT_compare_bridge_id (&port->msgPrio.design_bridge,
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai                                    &port->portPrio.design_bridge) &&
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      AGREEMENT_BIT & port->msgFlags) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#ifdef STP_DBG
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    if (this->debug) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      stp_trace ("%s", "rcvBpdu: ConfirmedRootMsg");
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#endif
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    return ConfirmedRootMsg;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#ifdef STP_DBG
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    if (this->debug) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      if (RSTP_PORT_ROLE_ROOT == port->msgBpduType) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    if (!port->operPointToPointMac) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      stp_trace("rcvBpdu: OtherMsg: not point-to-point MAC");
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    } else if (STP_VECT_compare_bridge_id (&port->msgPrio.design_bridge,
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      &port->portPrio.design_bridge)) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      STP_VECT_br_id_print("rcvBpdu: OtherMsg: msgPrio", &port->msgPrio.design_bridge, True);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      STP_VECT_br_id_print("rcvBpdu:          portPrio", &port->portPrio.design_bridge, True);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    } else {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      stp_trace("rcvBpdu: OtherMsg: agreement bit not set");
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      } else {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    stp_trace ("rcvBpdu: OtherMsg: type %d", port->msgBpduType);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#endif
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  return OtherMsg;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai}
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai/* ARGSUSED */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavaistatic Bool
4eaa471005973e11a6110b69fe990530b3b95a38Rishi SrivatsavairecordProposed (STATE_MACH_T* this, char* reason)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai{/* 17.19.9 */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  register PORT_T* port = this->owner.port;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  if (RSTP_PORT_ROLE_DESGN == port->msgPortRole &&
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      (PROPOSAL_BIT & port->msgFlags)           &&
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->operPointToPointMac) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    return True;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  return False;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai}
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavaistatic void
4eaa471005973e11a6110b69fe990530b3b95a38Rishi SrivatsavaisetTcFlags (STATE_MACH_T* this)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai{/* 17.19.13 */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  register PORT_T* port = this->owner.port;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  if (BPDU_TOPO_CHANGE_TYPE == port->msgBpduType) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#ifdef STP_DBG
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      if (this->debug) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        stp_trace ("port %s rx rcvdTcn", port->port_name);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#endif
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    port->rcvdTcn = True;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  } else {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    if (TOPOLOGY_CHANGE_BIT & port->msgFlags) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#ifdef STP_DBG
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      if (this->debug) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        stp_trace ("(%s-%s) rx rcvdTc 0X%lx",
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            port->owner->name, port->port_name,
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            (unsigned long) port->msgFlags);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#endif
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->rcvdTc = True;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    if (TOPOLOGY_CHANGE_ACK_BIT & port->msgFlags) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#ifdef STP_DBG
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      if (this->debug) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        stp_trace ("port %s rx rcvdTcAck 0X%lx",
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            port->port_name,
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            (unsigned long) port->msgFlags);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#endif
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->rcvdTcAck = True;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai}
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavaistatic void
4eaa471005973e11a6110b69fe990530b3b95a38Rishi SrivatsavaiupdtBPDUVersion (STATE_MACH_T* this)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai{/* 17.19.18 */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  register PORT_T* port = this->owner.port;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  if (BPDU_TOPO_CHANGE_TYPE == port->msgBpduType) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    port->rcvdSTP = True;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  if (port->msgBpduVersion < 2) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    port->rcvdSTP = True;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  if (BPDU_RSTP == port->msgBpduType) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    /* port->port->owner->ForceVersion >= NORMAL_RSTP
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai       we have checked in STP_info_rx_bpdu */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    port->rcvdRSTP = True;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai}
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavaistatic void
4eaa471005973e11a6110b69fe990530b3b95a38Rishi SrivatsavaiupdtRcvdInfoWhile (STATE_MACH_T* this)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai{/* 17.19.19 */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  register int eff_age, dm, dt;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  register int hello3;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  register PORT_T* port = this->owner.port;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  eff_age = ( + port->portTimes.MaxAge) / 16;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  if (eff_age < 1) eff_age = 1;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  eff_age += port->portTimes.MessageAge;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  if (eff_age <= port->portTimes.MaxAge) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    hello3 = 3 *  port->portTimes.HelloTime;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    dm = port->portTimes.MaxAge - eff_age;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    if (dm > hello3)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      dt = hello3;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    else
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      dt = dm;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    port->rcvdInfoWhile = dt;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai/****
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    stp_trace ("ma=%d eff_age=%d dm=%d dt=%d p=%s",
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai               (int) port->portTimes.MessageAge,
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai               (int) eff_age, (int) dm, (int) dt, port->port_name);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai****/
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  } else {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    port->rcvdInfoWhile = 0;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai/****/
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#ifdef STP_DBG
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    /*if (this->debug) */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      stp_trace ("port %s: MaxAge=%d MessageAge=%d HelloTime=%d rcvdInfoWhile=null !",
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            port->port_name,
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai                (int) port->portTimes.MaxAge,
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai                (int) port->portTimes.MessageAge,
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai                (int) port->portTimes.HelloTime);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#endif
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai/****/
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai}
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai/* ARGSUSED */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavaivoid
4eaa471005973e11a6110b69fe990530b3b95a38Rishi SrivatsavaiSTP_info_rx_bpdu (PORT_T* port, struct stp_bpdu_t* bpdu, size_t len)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai{
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#if 0
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  _stp_dump ("\nall BPDU", ((unsigned char*) bpdu) - 12, len + 12);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  _stp_dump ("ETH_HEADER", (unsigned char*) &bpdu->eth, 5);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  _stp_dump ("BPDU_HEADER", (unsigned char*) &bpdu->hdr, 4);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  stp_trace ("protocol=%02x%02x version=%02x bpdu_type=%02x\n",
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai     bpdu->hdr.protocol[0], bpdu->hdr.protocol[1],
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai     bpdu->hdr.version, bpdu->hdr.bpdu_type);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  _stp_dump ("\nBPDU_BODY", (unsigned char*) &bpdu->body, sizeof (BPDU_BODY_T) + 2);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  stp_trace ("flags=%02x\n", bpdu->body.flags);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  _stp_dump ("root_id", bpdu->body.root_id, 8);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  _stp_dump ("root_path_cost", bpdu->body.root_path_cost, 4);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  _stp_dump ("bridge_id", bpdu->body.bridge_id, 8);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  _stp_dump ("port_id", bpdu->body.port_id, 2);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  _stp_dump ("message_age", bpdu->body.message_age, 2);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  _stp_dump ("max_age", bpdu->body.max_age, 2);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  _stp_dump ("hello_time", bpdu->body.hello_time, 2);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  _stp_dump ("forward_delay", bpdu->body.forward_delay, 2);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  _stp_dump ("ver_1_len", bpdu->ver_1_len, 2);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#endif
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  /* check bpdu type */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  switch (bpdu->hdr.bpdu_type) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case BPDU_CONFIG_TYPE:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->rx_cfg_bpdu_cnt++;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#ifdef STP_DBG
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      if (port->info->debug)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        stp_trace ("CfgBpdu on port %s", port->port_name);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#endif
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      if (port->admin_non_stp) return;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->rcvdBpdu = True;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case BPDU_TOPO_CHANGE_TYPE:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->rx_tcn_bpdu_cnt++;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#ifdef STP_DBG
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      if (port->info->debug)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        stp_trace ("TcnBpdu on port %s", port->port_name);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#endif
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      if (port->admin_non_stp) return;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->rcvdBpdu = True;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->msgBpduVersion = bpdu->hdr.version;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->msgBpduType = bpdu->hdr.bpdu_type;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      return;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    default:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      stp_trace ("RX undef bpdu type=%d", (int) bpdu->hdr.bpdu_type);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      return;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case BPDU_RSTP:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->rx_rstp_bpdu_cnt++;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      if (port->admin_non_stp) return;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      if (port->owner->ForceVersion >= NORMAL_RSTP) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        port->rcvdBpdu = True;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      } else {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        return;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#ifdef STP_DBG
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      if (port->info->debug)
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        stp_trace ("BPDU_RSTP on port %s", port->port_name);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#endif
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  port->msgBpduVersion = bpdu->hdr.version;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  port->msgBpduType =    bpdu->hdr.bpdu_type;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  port->msgFlags =       bpdu->body.flags;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  /* 17.18.11 */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  STP_VECT_get_vector (&bpdu->body, &port->msgPrio);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  port->msgPrio.bridge_port = port->port_id;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  /* 17.18.12 */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  STP_get_times (&bpdu->body, &port->msgTimes);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  /* 17.18.25, 17.18.26 : see setTcFlags() */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai}
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavaivoid STP_info_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      port->rcvdMsg = OtherMsg;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->msgBpduType = (unsigned char)-1;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->msgPortRole = RSTP_PORT_ROLE_UNKN;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->msgFlags = 0;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      /* clear port statistics */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->rx_cfg_bpdu_cnt =
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->rx_rstp_bpdu_cnt =
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->rx_tcn_bpdu_cnt = 0;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      /* FALLTHRU */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case DISABLED:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->rcvdBpdu = port->rcvdRSTP = port->rcvdSTP = False;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->updtInfo = port->proposing = False; /* In DISABLED */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->agreed = port->proposed = False;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->rcvdInfoWhile = 0;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->infoIs = Disabled;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->reselect = True;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->selected = False;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case ENABLED: /* IEEE 802.1y, 17.21, Z.14 */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      STP_VECT_copy (&port->portPrio, &port->designPrio);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      STP_copy_times (&port->portTimes, &port->designTimes);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case AGED:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->infoIs = Aged;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->reselect = True;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->selected = False;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case UPDATE:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      STP_VECT_copy (&port->portPrio, &port->designPrio);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      STP_copy_times (&port->portTimes, &port->designTimes);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->updtInfo = False;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->agreed = port->synced = False; /* In UPDATE */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->proposed = port->proposing = False; /* in UPDATE */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->infoIs = Mine;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->newInfo = True;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#ifdef STP_DBG
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      if (this->debug) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        STP_VECT_br_id_print ("updated: portPrio.design_bridge",
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai                            &port->portPrio.design_bridge, True);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        STP_VECT_br_id_print ("updated:   portPrio.root_bridge",
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai                            &port->portPrio.root_bridge, True);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#endif
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case CURRENT:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case RECEIVE:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->rcvdMsg = rcvBpdu (this);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      updtBPDUVersion (this);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      setTcFlags (this);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->rcvdBpdu = False;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case SUPERIOR:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      STP_VECT_copy (&port->portPrio, &port->msgPrio);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      STP_copy_times (&port->portTimes, &port->msgTimes);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      updtRcvdInfoWhile (this);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#if 1 /* due 802.1y, Z.7 */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->agreed = False; /* deleted due 802.y in SUPERIOR */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->synced = False; /* due 802.y deleted in SUPERIOR */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#endif
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->proposing = False; /* in SUPERIOR */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->proposed = recordProposed (this, "SUPERIOR");
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->infoIs = Received;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->reselect = True;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->selected = False;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#ifdef STP_DBG
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      if (this->debug) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        STP_VECT_br_id_print ("stored: portPrio.design_bridge",
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai                            &port->portPrio.design_bridge, True);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        STP_VECT_br_id_print ("stored:   portPrio.root_bridge",
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai                            &port->portPrio.root_bridge, True);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        stp_trace ("proposed=%d on port %s",
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai                   (int) port->proposed, port->port_name);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#endif
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case REPEAT:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->proposed = recordProposed (this, "REPEAT");
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      updtRcvdInfoWhile (this);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  case AGREEMENT:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#ifdef STP_DBG
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      if (port->roletrns->debug) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        stp_trace ("(%s-%s) rx AGREEMENT flag !",
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai            port->owner->name, port->port_name);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai#endif
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->agreed = True;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      port->proposing = False; /* In AGREEMENT */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai}
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi SrivatsavaiBool STP_info_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->infoIs != Disabled) || BEGIN == this->State) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    return STP_hop_2_state (this, DISABLED);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  switch (this->State) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case DISABLED:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      if (port->updtInfo) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        return STP_hop_2_state (this, DISABLED);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      if (port->portEnabled && port->selected) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        return STP_hop_2_state (this, ENABLED);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      if (port->rcvdBpdu) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        return STP_hop_2_state (this, DISABLED);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case ENABLED: /* IEEE 802.1y, 17.21, Z.14 */
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      return STP_hop_2_state (this, AGED);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case AGED:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      if (port->selected && port->updtInfo) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        return STP_hop_2_state (this, UPDATE);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case UPDATE:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      return STP_hop_2_state (this, CURRENT);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case CURRENT:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      if (port->selected && port->updtInfo) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        return STP_hop_2_state (this, UPDATE);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      if (Received == port->infoIs       &&
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai          ! port->rcvdInfoWhile &&
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai          ! port->updtInfo               &&
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai          ! port->rcvdBpdu) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        return STP_hop_2_state (this, AGED);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      if (port->rcvdBpdu && !port->updtInfo) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        return STP_hop_2_state (this, RECEIVE);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      break;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case RECEIVE:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      switch (port->rcvdMsg) {
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        case SuperiorDesignateMsg:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai          return STP_hop_2_state (this, SUPERIOR);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        case RepeatedDesignateMsg:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai          return STP_hop_2_state (this, REPEAT);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        case ConfirmedRootMsg:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai          return STP_hop_2_state (this, AGREEMENT);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai        default:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai          return STP_hop_2_state (this, CURRENT);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case SUPERIOR:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      return STP_hop_2_state (this, CURRENT);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case REPEAT:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      return STP_hop_2_state (this, CURRENT);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai    case AGREEMENT:
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai      return STP_hop_2_state (this, CURRENT);
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  }
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai  return False;
4eaa471005973e11a6110b69fe990530b3b95a38Rishi Srivatsavai}