1*55fea89dSDan Cross /************************************************************************
2*55fea89dSDan Cross * RSTP library - Rapid Spanning Tree (802.1t, 802.1w)
3*55fea89dSDan Cross * Copyright (C) 2001-2003 Optical Access
4*55fea89dSDan Cross * Author: Alex Rozin
5*55fea89dSDan Cross *
6*55fea89dSDan Cross * This file is part of RSTP library.
7*55fea89dSDan Cross *
8*55fea89dSDan Cross * RSTP library is free software; you can redistribute it and/or modify it
9*55fea89dSDan Cross * under the terms of the GNU Lesser General Public License as published by the
10*55fea89dSDan Cross * Free Software Foundation; version 2.1
11*55fea89dSDan Cross *
12*55fea89dSDan Cross * RSTP library is distributed in the hope that it will be useful, but
13*55fea89dSDan Cross * WITHOUT ANY WARRANTY; without even the implied warranty of
14*55fea89dSDan Cross * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
15*55fea89dSDan Cross * General Public License for more details.
16*55fea89dSDan Cross *
17*55fea89dSDan Cross * You should have received a copy of the GNU Lesser General Public License
18*55fea89dSDan Cross * along with RSTP library; see the file COPYING. If not, write to the Free
19*55fea89dSDan Cross * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
20*55fea89dSDan Cross * 02111-1307, USA.
214eaa4710SRishi Srivatsavai **********************************************************************/
224eaa4710SRishi Srivatsavai
234eaa4710SRishi Srivatsavai /* Point To Point MAC mode selection machine : 6.4.3, 6.5.1 */
24*55fea89dSDan Cross
254eaa4710SRishi Srivatsavai #include "base.h"
264eaa4710SRishi Srivatsavai #include "stpm.h"
274eaa4710SRishi Srivatsavai #include "stp_to.h" /* for STP_OUT_get_duplex */
284eaa4710SRishi Srivatsavai
294eaa4710SRishi Srivatsavai #define STATES { \
304eaa4710SRishi Srivatsavai CHOOSE(INIT), \
314eaa4710SRishi Srivatsavai CHOOSE(RECOMPUTE), \
324eaa4710SRishi Srivatsavai CHOOSE(STABLE) \
334eaa4710SRishi Srivatsavai }
344eaa4710SRishi Srivatsavai
354eaa4710SRishi Srivatsavai #define GET_STATE_NAME STP_p2p_get_state_name
364eaa4710SRishi Srivatsavai #include "choose.h"
374eaa4710SRishi Srivatsavai
384eaa4710SRishi Srivatsavai static Bool
computeP2P(PORT_T * port)394eaa4710SRishi Srivatsavai computeP2P (PORT_T *port)
404eaa4710SRishi Srivatsavai {
414eaa4710SRishi Srivatsavai switch (port->adminPointToPointMac) {
424eaa4710SRishi Srivatsavai case P2P_FORCE_TRUE:
434eaa4710SRishi Srivatsavai return True;
444eaa4710SRishi Srivatsavai case P2P_FORCE_FALSE:
454eaa4710SRishi Srivatsavai return False;
464eaa4710SRishi Srivatsavai default:
474eaa4710SRishi Srivatsavai case P2P_AUTO:
484eaa4710SRishi Srivatsavai return STP_OUT_get_duplex (port->port_index);
494eaa4710SRishi Srivatsavai }
504eaa4710SRishi Srivatsavai }
514eaa4710SRishi Srivatsavai
524eaa4710SRishi Srivatsavai void
STP_p2p_enter_state(STATE_MACH_T * s)534eaa4710SRishi Srivatsavai STP_p2p_enter_state (STATE_MACH_T* s)
544eaa4710SRishi Srivatsavai {
554eaa4710SRishi Srivatsavai register PORT_T* port = s->owner.port;
564eaa4710SRishi Srivatsavai
574eaa4710SRishi Srivatsavai switch (s->State) {
584eaa4710SRishi Srivatsavai case BEGIN:
594eaa4710SRishi Srivatsavai case INIT:
604eaa4710SRishi Srivatsavai port->p2p_recompute = True;
614eaa4710SRishi Srivatsavai break;
624eaa4710SRishi Srivatsavai case RECOMPUTE:
634eaa4710SRishi Srivatsavai port->operPointToPointMac = computeP2P (port);
644eaa4710SRishi Srivatsavai port->p2p_recompute = False;
654eaa4710SRishi Srivatsavai break;
664eaa4710SRishi Srivatsavai case STABLE:
674eaa4710SRishi Srivatsavai break;
684eaa4710SRishi Srivatsavai }
694eaa4710SRishi Srivatsavai }
704eaa4710SRishi Srivatsavai
714eaa4710SRishi Srivatsavai Bool
STP_p2p_check_conditions(STATE_MACH_T * s)724eaa4710SRishi Srivatsavai STP_p2p_check_conditions (STATE_MACH_T* s)
734eaa4710SRishi Srivatsavai {
744eaa4710SRishi Srivatsavai register PORT_T* port = s->owner.port;
754eaa4710SRishi Srivatsavai
764eaa4710SRishi Srivatsavai switch (s->State) {
774eaa4710SRishi Srivatsavai case BEGIN:
784eaa4710SRishi Srivatsavai case INIT:
794eaa4710SRishi Srivatsavai return STP_hop_2_state (s, STABLE);
804eaa4710SRishi Srivatsavai case RECOMPUTE:
814eaa4710SRishi Srivatsavai return STP_hop_2_state (s, STABLE);
824eaa4710SRishi Srivatsavai case STABLE:
834eaa4710SRishi Srivatsavai if (port->p2p_recompute) {
844eaa4710SRishi Srivatsavai return STP_hop_2_state (s, RECOMPUTE);
854eaa4710SRishi Srivatsavai }
864eaa4710SRishi Srivatsavai break;
874eaa4710SRishi Srivatsavai }
884eaa4710SRishi Srivatsavai return False;
894eaa4710SRishi Srivatsavai }
904eaa4710SRishi Srivatsavai
91