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 /* Port State Transition state machine : 17.24 */
24*4eaa4710SRishi Srivatsavai
25*4eaa4710SRishi Srivatsavai #include "base.h"
26*4eaa4710SRishi Srivatsavai #include "stpm.h"
27*4eaa4710SRishi Srivatsavai #include "stp_to.h"
28*4eaa4710SRishi Srivatsavai
29*4eaa4710SRishi Srivatsavai #define STATES { \
30*4eaa4710SRishi Srivatsavai CHOOSE(DISCARDING), \
31*4eaa4710SRishi Srivatsavai CHOOSE(LEARNING), \
32*4eaa4710SRishi Srivatsavai CHOOSE(FORWARDING) \
33*4eaa4710SRishi Srivatsavai }
34*4eaa4710SRishi Srivatsavai
35*4eaa4710SRishi Srivatsavai #define GET_STATE_NAME STP_sttrans_get_state_name
36*4eaa4710SRishi Srivatsavai #include "choose.h"
37*4eaa4710SRishi Srivatsavai
38*4eaa4710SRishi Srivatsavai
39*4eaa4710SRishi Srivatsavai #ifdef STRONGLY_SPEC_802_1W
40*4eaa4710SRishi Srivatsavai static Bool
disableLearning(STATE_MACH_T * this)41*4eaa4710SRishi Srivatsavai disableLearning (STATE_MACH_T *this)
42*4eaa4710SRishi Srivatsavai {
43*4eaa4710SRishi Srivatsavai register PORT_T *port = this->owner.port;
44*4eaa4710SRishi Srivatsavai
45*4eaa4710SRishi Srivatsavai return STP_OUT_set_learning (port->port_index, port->owner->vlan_id, False);
46*4eaa4710SRishi Srivatsavai }
47*4eaa4710SRishi Srivatsavai
48*4eaa4710SRishi Srivatsavai static Bool
enableLearning(STATE_MACH_T * this)49*4eaa4710SRishi Srivatsavai enableLearning (STATE_MACH_T *this)
50*4eaa4710SRishi Srivatsavai {
51*4eaa4710SRishi Srivatsavai register PORT_T *port = this->owner.port;
52*4eaa4710SRishi Srivatsavai
53*4eaa4710SRishi Srivatsavai return STP_OUT_set_learning (port->port_index, port->owner->vlan_id, True);
54*4eaa4710SRishi Srivatsavai }
55*4eaa4710SRishi Srivatsavai
56*4eaa4710SRishi Srivatsavai static Bool
disableForwarding(STATE_MACH_T * this)57*4eaa4710SRishi Srivatsavai disableForwarding (STATE_MACH_T *this)
58*4eaa4710SRishi Srivatsavai {
59*4eaa4710SRishi Srivatsavai register PORT_T *port = this->owner.port;
60*4eaa4710SRishi Srivatsavai
61*4eaa4710SRishi Srivatsavai return STP_OUT_set_forwarding (port->port_index, port->owner->vlan_id, False);
62*4eaa4710SRishi Srivatsavai }
63*4eaa4710SRishi Srivatsavai
64*4eaa4710SRishi Srivatsavai static Bool
enableForwarding(STATE_MACH_T * this)65*4eaa4710SRishi Srivatsavai enableForwarding (STATE_MACH_T *this)
66*4eaa4710SRishi Srivatsavai {
67*4eaa4710SRishi Srivatsavai register PORT_T *port = this->owner.port;
68*4eaa4710SRishi Srivatsavai
69*4eaa4710SRishi Srivatsavai return STP_OUT_set_forwarding (port->port_index, port->owner->vlan_id, True);
70*4eaa4710SRishi Srivatsavai }
71*4eaa4710SRishi Srivatsavai #endif
72*4eaa4710SRishi Srivatsavai
73*4eaa4710SRishi Srivatsavai void
STP_sttrans_enter_state(STATE_MACH_T * this)74*4eaa4710SRishi Srivatsavai STP_sttrans_enter_state (STATE_MACH_T *this)
75*4eaa4710SRishi Srivatsavai {
76*4eaa4710SRishi Srivatsavai register PORT_T *port = this->owner.port;
77*4eaa4710SRishi Srivatsavai
78*4eaa4710SRishi Srivatsavai switch (this->State) {
79*4eaa4710SRishi Srivatsavai case BEGIN:
80*4eaa4710SRishi Srivatsavai case DISCARDING:
81*4eaa4710SRishi Srivatsavai port->learning = False;
82*4eaa4710SRishi Srivatsavai port->forwarding = False;
83*4eaa4710SRishi Srivatsavai #ifdef STRONGLY_SPEC_802_1W
84*4eaa4710SRishi Srivatsavai disableLearning (this);
85*4eaa4710SRishi Srivatsavai disableForwarding (this);
86*4eaa4710SRishi Srivatsavai #else
87*4eaa4710SRishi Srivatsavai STP_OUT_set_port_state (port->port_index, port->owner->vlan_id, UID_PORT_DISCARDING);
88*4eaa4710SRishi Srivatsavai #endif
89*4eaa4710SRishi Srivatsavai break;
90*4eaa4710SRishi Srivatsavai case LEARNING:
91*4eaa4710SRishi Srivatsavai port->learning = True;
92*4eaa4710SRishi Srivatsavai #ifdef STRONGLY_SPEC_802_1W
93*4eaa4710SRishi Srivatsavai enableLearning (this);
94*4eaa4710SRishi Srivatsavai #else
95*4eaa4710SRishi Srivatsavai STP_OUT_set_port_state (port->port_index, port->owner->vlan_id, UID_PORT_LEARNING);
96*4eaa4710SRishi Srivatsavai #endif
97*4eaa4710SRishi Srivatsavai break;
98*4eaa4710SRishi Srivatsavai case FORWARDING:
99*4eaa4710SRishi Srivatsavai port->tc = !port->operEdge;
100*4eaa4710SRishi Srivatsavai port->forwarding = True;
101*4eaa4710SRishi Srivatsavai #ifdef STRONGLY_SPEC_802_1W
102*4eaa4710SRishi Srivatsavai enableForwarding (this);
103*4eaa4710SRishi Srivatsavai #else
104*4eaa4710SRishi Srivatsavai STP_OUT_set_port_state (port->port_index, port->owner->vlan_id, UID_PORT_FORWARDING);
105*4eaa4710SRishi Srivatsavai #endif
106*4eaa4710SRishi Srivatsavai break;
107*4eaa4710SRishi Srivatsavai }
108*4eaa4710SRishi Srivatsavai
109*4eaa4710SRishi Srivatsavai }
110*4eaa4710SRishi Srivatsavai
111*4eaa4710SRishi Srivatsavai Bool
STP_sttrans_check_conditions(STATE_MACH_T * this)112*4eaa4710SRishi Srivatsavai STP_sttrans_check_conditions (STATE_MACH_T *this)
113*4eaa4710SRishi Srivatsavai {
114*4eaa4710SRishi Srivatsavai register PORT_T *port = this->owner.port;
115*4eaa4710SRishi Srivatsavai
116*4eaa4710SRishi Srivatsavai switch (this->State) {
117*4eaa4710SRishi Srivatsavai case BEGIN:
118*4eaa4710SRishi Srivatsavai return STP_hop_2_state (this, DISCARDING);
119*4eaa4710SRishi Srivatsavai case DISCARDING:
120*4eaa4710SRishi Srivatsavai if (port->learn) {
121*4eaa4710SRishi Srivatsavai return STP_hop_2_state (this, LEARNING);
122*4eaa4710SRishi Srivatsavai }
123*4eaa4710SRishi Srivatsavai break;
124*4eaa4710SRishi Srivatsavai case LEARNING:
125*4eaa4710SRishi Srivatsavai if (port->forward) {
126*4eaa4710SRishi Srivatsavai return STP_hop_2_state (this, FORWARDING);
127*4eaa4710SRishi Srivatsavai }
128*4eaa4710SRishi Srivatsavai if (!port->learn) {
129*4eaa4710SRishi Srivatsavai return STP_hop_2_state (this, DISCARDING);
130*4eaa4710SRishi Srivatsavai }
131*4eaa4710SRishi Srivatsavai break;
132*4eaa4710SRishi Srivatsavai case FORWARDING:
133*4eaa4710SRishi Srivatsavai if (!port->forward) {
134*4eaa4710SRishi Srivatsavai return STP_hop_2_state (this, DISCARDING);
135*4eaa4710SRishi Srivatsavai }
136*4eaa4710SRishi Srivatsavai break;
137*4eaa4710SRishi Srivatsavai }
138*4eaa4710SRishi Srivatsavai
139*4eaa4710SRishi Srivatsavai return False;
140*4eaa4710SRishi Srivatsavai }
141