1*4eaa4710SRishi Srivatsavai /************************************************************************
2*4eaa4710SRishi Srivatsavai * RSTP library - Rapid Spanning Tree (802.1t, 802.1w)
3*4eaa4710SRishi Srivatsavai * Copyright (C) 2001-2003 Optical Access
4*4eaa4710SRishi Srivatsavai * Author: Alex Rozin
5*4eaa4710SRishi Srivatsavai *
6*4eaa4710SRishi Srivatsavai * This file is part of RSTP library.
7*4eaa4710SRishi Srivatsavai *
8*4eaa4710SRishi Srivatsavai * RSTP library is free software; you can redistribute it and/or modify it
9*4eaa4710SRishi Srivatsavai * under the terms of the GNU Lesser General Public License as published by the
10*4eaa4710SRishi Srivatsavai * Free Software Foundation; version 2.1
11*4eaa4710SRishi Srivatsavai *
12*4eaa4710SRishi Srivatsavai * RSTP library is distributed in the hope that it will be useful, but
13*4eaa4710SRishi Srivatsavai * WITHOUT ANY WARRANTY; without even the implied warranty of
14*4eaa4710SRishi Srivatsavai * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
15*4eaa4710SRishi Srivatsavai * General Public License for more details.
16*4eaa4710SRishi Srivatsavai *
17*4eaa4710SRishi Srivatsavai * You should have received a copy of the GNU Lesser General Public License
18*4eaa4710SRishi Srivatsavai * along with RSTP library; see the file COPYING. If not, write to the Free
19*4eaa4710SRishi Srivatsavai * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
20*4eaa4710SRishi Srivatsavai * 02111-1307, USA.
21*4eaa4710SRishi Srivatsavai **********************************************************************/
22*4eaa4710SRishi Srivatsavai
23*4eaa4710SRishi Srivatsavai /* Point To Point MAC mode selection machine : 6.4.3, 6.5.1 */
24*4eaa4710SRishi Srivatsavai
25*4eaa4710SRishi Srivatsavai #include "base.h"
26*4eaa4710SRishi Srivatsavai #include "stpm.h"
27*4eaa4710SRishi Srivatsavai #include "stp_to.h" /* for STP_OUT_get_duplex */
28*4eaa4710SRishi Srivatsavai
29*4eaa4710SRishi Srivatsavai #define STATES { \
30*4eaa4710SRishi Srivatsavai CHOOSE(INIT), \
31*4eaa4710SRishi Srivatsavai CHOOSE(RECOMPUTE), \
32*4eaa4710SRishi Srivatsavai CHOOSE(STABLE) \
33*4eaa4710SRishi Srivatsavai }
34*4eaa4710SRishi Srivatsavai
35*4eaa4710SRishi Srivatsavai #define GET_STATE_NAME STP_p2p_get_state_name
36*4eaa4710SRishi Srivatsavai #include "choose.h"
37*4eaa4710SRishi Srivatsavai
38*4eaa4710SRishi Srivatsavai static Bool
computeP2P(PORT_T * port)39*4eaa4710SRishi Srivatsavai computeP2P (PORT_T *port)
40*4eaa4710SRishi Srivatsavai {
41*4eaa4710SRishi Srivatsavai switch (port->adminPointToPointMac) {
42*4eaa4710SRishi Srivatsavai case P2P_FORCE_TRUE:
43*4eaa4710SRishi Srivatsavai return True;
44*4eaa4710SRishi Srivatsavai case P2P_FORCE_FALSE:
45*4eaa4710SRishi Srivatsavai return False;
46*4eaa4710SRishi Srivatsavai default:
47*4eaa4710SRishi Srivatsavai case P2P_AUTO:
48*4eaa4710SRishi Srivatsavai return STP_OUT_get_duplex (port->port_index);
49*4eaa4710SRishi Srivatsavai }
50*4eaa4710SRishi Srivatsavai }
51*4eaa4710SRishi Srivatsavai
52*4eaa4710SRishi Srivatsavai void
STP_p2p_enter_state(STATE_MACH_T * s)53*4eaa4710SRishi Srivatsavai STP_p2p_enter_state (STATE_MACH_T* s)
54*4eaa4710SRishi Srivatsavai {
55*4eaa4710SRishi Srivatsavai register PORT_T* port = s->owner.port;
56*4eaa4710SRishi Srivatsavai
57*4eaa4710SRishi Srivatsavai switch (s->State) {
58*4eaa4710SRishi Srivatsavai case BEGIN:
59*4eaa4710SRishi Srivatsavai case INIT:
60*4eaa4710SRishi Srivatsavai port->p2p_recompute = True;
61*4eaa4710SRishi Srivatsavai break;
62*4eaa4710SRishi Srivatsavai case RECOMPUTE:
63*4eaa4710SRishi Srivatsavai port->operPointToPointMac = computeP2P (port);
64*4eaa4710SRishi Srivatsavai port->p2p_recompute = False;
65*4eaa4710SRishi Srivatsavai break;
66*4eaa4710SRishi Srivatsavai case STABLE:
67*4eaa4710SRishi Srivatsavai break;
68*4eaa4710SRishi Srivatsavai }
69*4eaa4710SRishi Srivatsavai }
70*4eaa4710SRishi Srivatsavai
71*4eaa4710SRishi Srivatsavai Bool
STP_p2p_check_conditions(STATE_MACH_T * s)72*4eaa4710SRishi Srivatsavai STP_p2p_check_conditions (STATE_MACH_T* s)
73*4eaa4710SRishi Srivatsavai {
74*4eaa4710SRishi Srivatsavai register PORT_T* port = s->owner.port;
75*4eaa4710SRishi Srivatsavai
76*4eaa4710SRishi Srivatsavai switch (s->State) {
77*4eaa4710SRishi Srivatsavai case BEGIN:
78*4eaa4710SRishi Srivatsavai case INIT:
79*4eaa4710SRishi Srivatsavai return STP_hop_2_state (s, STABLE);
80*4eaa4710SRishi Srivatsavai case RECOMPUTE:
81*4eaa4710SRishi Srivatsavai return STP_hop_2_state (s, STABLE);
82*4eaa4710SRishi Srivatsavai case STABLE:
83*4eaa4710SRishi Srivatsavai if (port->p2p_recompute) {
84*4eaa4710SRishi Srivatsavai return STP_hop_2_state (s, RECOMPUTE);
85*4eaa4710SRishi Srivatsavai }
86*4eaa4710SRishi Srivatsavai break;
87*4eaa4710SRishi Srivatsavai }
88*4eaa4710SRishi Srivatsavai return False;
89*4eaa4710SRishi Srivatsavai }
90*4eaa4710SRishi Srivatsavai
91