edge.c
上传用户:allwinjm
上传日期:2021-08-29
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文件大小:3k
- /************************************************************************
- * 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 GET_STATE_NAME STP_edge_get_state_name
- #include "choose.h"
- #define DEFAULT_LINK_DELAY 3
- void
- STP_edge_enter_state (STATE_MACH_T *s)
- {
- register PORT_T *port = s->owner.port;
- switch (s->State) {
- case BEGIN:
- break;
- case DISABLED:
- port->operEdge = port->adminEdge;
- port->wasInitBpdu = False;
- port->lnkWhile = 0;
- port->portEnabled = False;
- break;
- case DETECTED:
- port->portEnabled = True;
- port->lnkWhile = port->LinkDelay;
- port->operEdge = False;
- break;
- case DELEAYED:
- break;
- case RESOLVED:
- if (! port->wasInitBpdu) {
- port->operEdge = port->adminEdge;
- }
- break;
- }
- }
- Bool
- STP_edge_check_conditions (STATE_MACH_T *s)
- {
- register PORT_T *port = s->owner.port;
- switch (s->State) {
- case BEGIN:
- return STP_hop_2_state (s, DISABLED);
- case DISABLED:
- if (port->adminEnable) {
- return STP_hop_2_state (s, DETECTED);
- }
- break;
- case DETECTED:
- 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
- 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
- return STP_hop_2_state (s, RESOLVED);
- }
- if (! port->adminEnable) {
- return STP_hop_2_state (s, DISABLED);
- }
- break;
- case RESOLVED:
- if (! port->adminEnable) {
- return STP_hop_2_state (s, DISABLED);
- }
- break;
- }
- return False;
- }