edge.c

rstp for switch in vxworks

/************************************************************************ 
 * 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. 
 **********************************************************************/

/* Note: this state mashine distinkts from described in P802.1t Clause 18. */
/* I am ready to discuss it                                                */

#include "base.h"
#include "stpm.h"



#define STATES {        \
  CHOOSE(DISABLED),         \
  CHOOSE(DETECTED),     \
  CHOOSE(DELEAYED),     \
  CHOOSE(RESOLVED),     \
}


#define DISABLED   2
#define DETECTED   3
#define DELEAYED   4
#define RESOLVED   5

#define GET_STATE_NAME STP_edge_get_state_name
#include "choose.h"

#define DEFAULT_LINK_DELAY  3


/**********************************************************************************
	函数名称:  STP_edge_check_conditions 
	功能描述:  edge状态机的转换，状态函数
	输入参数:
	输出参数:
	返回值:
	日期:
	作者:
	备注:
***********************************************************************************/

void STP_edge_enter_state (STATE_MACH_T * s)
{
	register struct net_bridge_port *port = s->owner.port;

	switch (s->State)
	{
		case BEGIN:
#ifdef _EDGE_DEBUG
		mn_fd_printf(cl_serv_console_fd, "edge: Enter  BEGIN\r\n");
		#endif

			break;
		case DISABLED:
#ifdef _EDGE_DEBUG
		mn_fd_printf(cl_serv_console_fd, "edge: Enter  DISABLED\r\n");
		#endif


			port->operEdge = port->adminEdge;
			port->wasInitBpdu = False;
			port->lnkWhile = 0;
			port->portEnabled = False;
			break;
		case DETECTED:
		#ifdef _EDGE_DEBUG
		mn_fd_printf(cl_serv_console_fd, "edge: Enter  DETECTED\r\n");
		#endif
	

			port->portEnabled = True;
			port->lnkWhile = port->LinkDelay;
			port->operEdge = False;
			break;
		case DELEAYED:
		#ifdef _EDGE_DEBUG
		mn_fd_printf(cl_serv_console_fd, "edge: Enter  DELEAYED\r\n");
		#endif
		

			break;
		case RESOLVED:
		#ifdef _EDGE_DEBUG
		mn_fd_printf(cl_serv_console_fd, "edge: Enter  RESOLVED\r\n");
		#endif
		

			if (!port->wasInitBpdu)
			{
				port->operEdge = port->adminEdge;
			}
			break;
		default:
			break;
	}
}



/**********************************************************************************
	函数名称:  STP_edge_check_conditions 
	功能描述:  检查edge
	输入参数:
	输出参数:
	返回值:
	日期:
	作者:
	备注:
***********************************************************************************/

Bool STP_edge_check_conditions (STATE_MACH_T * s)
{
	register struct net_bridge_port *port = s->owner.port;

	switch (s->State)
	{
		case BEGIN:
		#ifdef _EDGE_DEBUG
		mn_fd_printf(cl_serv_console_fd, "edge: BEGIN  TO DISABLE \r\n");
		#endif
	

			return STP_hop_2_state (s, DISABLED);
		case DISABLED:
			if (port->adminEnable)
			{
	#ifdef _EDGE_DEBUG
		mn_fd_printf(cl_serv_console_fd, "edge: DISABLE  TO DETECTED \r\n");
		#endif
	

				return STP_hop_2_state (s, DETECTED);
			}
			break;
		case DETECTED:
	#ifdef _EDGE_DEBUG
		mn_fd_printf(cl_serv_console_fd, "edge: DETECTED  TO DELEAYED \r\n");
		#endif
	

			return STP_hop_2_state (s, DELEAYED);
		case DELEAYED:
			if (port->wasInitBpdu)
			{
#ifdef STP_DBG
				if (s->debug)
					stp_trace ("port %s 'edge' resolved by BPDU",
						port->port_name);
#endif
#ifdef _EDGE_DEBUG
		mn_fd_printf(cl_serv_console_fd, "edge: DELEAYED TO RESOLVED \r\n");
		#endif


				return STP_hop_2_state (s, RESOLVED);
			}

			if (!port->lnkWhile)
			{
#ifdef STP_DBG
				if (s->debug)
					stp_trace ("port %s 'edge' resolved by timer",
						port->port_name);
#endif
#ifdef _EDGE_DEBUG
		mn_fd_printf(cl_serv_console_fd, "edge: DELEAYED  TO RESOLVED \r\n");
		#endif
	

				return STP_hop_2_state (s, RESOLVED);
			}

			if (!port->adminEnable)
			{
				#ifdef _EDGE_DEBUG
		mn_fd_printf(cl_serv_console_fd, "edge: DELEAYED  TO DISABLED \r\n");
		#endif


				return STP_hop_2_state (s, DISABLED);
			}
			break;
		case RESOLVED:
			if (!port->adminEnable)
			{
				#ifdef _EDGE_DEBUG
		mn_fd_printf(cl_serv_console_fd, "edge: RESOLVED  TO DISABLED \r\n");
		#endif

				return STP_hop_2_state (s, DISABLED);
			}
			break;
	}
	return False;
}