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 /* STP machine instance : bridge per VLAN: 17.17 */
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_flush_lt */
28*4eaa4710SRishi Srivatsavai
29*4eaa4710SRishi Srivatsavai static STPM_T *bridges = NULL;
30*4eaa4710SRishi Srivatsavai
31*4eaa4710SRishi Srivatsavai static int
_stp_stpm_init_machine(STATE_MACH_T * this)32*4eaa4710SRishi Srivatsavai _stp_stpm_init_machine (STATE_MACH_T* this)
33*4eaa4710SRishi Srivatsavai {
34*4eaa4710SRishi Srivatsavai this->State = BEGIN;
35*4eaa4710SRishi Srivatsavai (*(this->concreteEnterState)) (this);
36*4eaa4710SRishi Srivatsavai return 0;
37*4eaa4710SRishi Srivatsavai }
38*4eaa4710SRishi Srivatsavai
39*4eaa4710SRishi Srivatsavai static int
_stp_stpm_iterate_machines(STPM_T * this,int (* iter_callb)(STATE_MACH_T *),Bool exit_on_non_zero_ret)40*4eaa4710SRishi Srivatsavai _stp_stpm_iterate_machines (STPM_T* this,
41*4eaa4710SRishi Srivatsavai int (*iter_callb) (STATE_MACH_T*),
42*4eaa4710SRishi Srivatsavai Bool exit_on_non_zero_ret)
43*4eaa4710SRishi Srivatsavai {
44*4eaa4710SRishi Srivatsavai register STATE_MACH_T* stater;
45*4eaa4710SRishi Srivatsavai register PORT_T* port;
46*4eaa4710SRishi Srivatsavai int iret, mret = 0;
47*4eaa4710SRishi Srivatsavai
48*4eaa4710SRishi Srivatsavai /* state machines per bridge */
49*4eaa4710SRishi Srivatsavai for (stater = this->machines; stater; stater = stater->next) {
50*4eaa4710SRishi Srivatsavai iret = (*iter_callb) (stater);
51*4eaa4710SRishi Srivatsavai if (exit_on_non_zero_ret && iret)
52*4eaa4710SRishi Srivatsavai return iret;
53*4eaa4710SRishi Srivatsavai else
54*4eaa4710SRishi Srivatsavai mret += iret;
55*4eaa4710SRishi Srivatsavai }
56*4eaa4710SRishi Srivatsavai
57*4eaa4710SRishi Srivatsavai /* state machines per port */
58*4eaa4710SRishi Srivatsavai for (port = this->ports; port; port = port->next) {
59*4eaa4710SRishi Srivatsavai for (stater = port->machines; stater; stater = stater->next) {
60*4eaa4710SRishi Srivatsavai iret = (*iter_callb) (stater);
61*4eaa4710SRishi Srivatsavai if (exit_on_non_zero_ret && iret)
62*4eaa4710SRishi Srivatsavai return iret;
63*4eaa4710SRishi Srivatsavai else
64*4eaa4710SRishi Srivatsavai mret += iret;
65*4eaa4710SRishi Srivatsavai }
66*4eaa4710SRishi Srivatsavai }
67*4eaa4710SRishi Srivatsavai
68*4eaa4710SRishi Srivatsavai return mret;
69*4eaa4710SRishi Srivatsavai }
70*4eaa4710SRishi Srivatsavai
71*4eaa4710SRishi Srivatsavai void
_stp_stpm_init_data(STPM_T * this)72*4eaa4710SRishi Srivatsavai _stp_stpm_init_data (STPM_T* this)
73*4eaa4710SRishi Srivatsavai {
74*4eaa4710SRishi Srivatsavai STP_VECT_create (&this->rootPrio,
75*4eaa4710SRishi Srivatsavai &this->BrId,
76*4eaa4710SRishi Srivatsavai 0,
77*4eaa4710SRishi Srivatsavai &this->BrId,
78*4eaa4710SRishi Srivatsavai 0, 0);
79*4eaa4710SRishi Srivatsavai
80*4eaa4710SRishi Srivatsavai this->BrTimes.MessageAge = 0;
81*4eaa4710SRishi Srivatsavai
82*4eaa4710SRishi Srivatsavai STP_copy_times (&this->rootTimes, &this->BrTimes);
83*4eaa4710SRishi Srivatsavai }
84*4eaa4710SRishi Srivatsavai
85*4eaa4710SRishi Srivatsavai static unsigned char
_check_topoch(STPM_T * this)86*4eaa4710SRishi Srivatsavai _check_topoch (STPM_T* this)
87*4eaa4710SRishi Srivatsavai {
88*4eaa4710SRishi Srivatsavai register PORT_T* port;
89*4eaa4710SRishi Srivatsavai
90*4eaa4710SRishi Srivatsavai for (port = this->ports; port; port = port->next) {
91*4eaa4710SRishi Srivatsavai if (port->tcWhile) {
92*4eaa4710SRishi Srivatsavai return 1;
93*4eaa4710SRishi Srivatsavai }
94*4eaa4710SRishi Srivatsavai }
95*4eaa4710SRishi Srivatsavai return 0;
96*4eaa4710SRishi Srivatsavai }
97*4eaa4710SRishi Srivatsavai
98*4eaa4710SRishi Srivatsavai void
STP_stpm_one_second(STPM_T * param)99*4eaa4710SRishi Srivatsavai STP_stpm_one_second (STPM_T* param)
100*4eaa4710SRishi Srivatsavai {
101*4eaa4710SRishi Srivatsavai STPM_T* this = (STPM_T*) param;
102*4eaa4710SRishi Srivatsavai register PORT_T* port;
103*4eaa4710SRishi Srivatsavai register int iii;
104*4eaa4710SRishi Srivatsavai
105*4eaa4710SRishi Srivatsavai if (STP_ENABLED != this->admin_state) return;
106*4eaa4710SRishi Srivatsavai
107*4eaa4710SRishi Srivatsavai for (port = this->ports; port; port = port->next) {
108*4eaa4710SRishi Srivatsavai for (iii = 0; iii < TIMERS_NUMBER; iii++) {
109*4eaa4710SRishi Srivatsavai if (*(port->timers[iii]) > 0) {
110*4eaa4710SRishi Srivatsavai (*port->timers[iii])--;
111*4eaa4710SRishi Srivatsavai }
112*4eaa4710SRishi Srivatsavai }
113*4eaa4710SRishi Srivatsavai port->uptime++;
114*4eaa4710SRishi Srivatsavai }
115*4eaa4710SRishi Srivatsavai
116*4eaa4710SRishi Srivatsavai (void) STP_stpm_update (this);
117*4eaa4710SRishi Srivatsavai this->Topo_Change = _check_topoch (this);
118*4eaa4710SRishi Srivatsavai if (this->Topo_Change) {
119*4eaa4710SRishi Srivatsavai this->Topo_Change_Count++;
120*4eaa4710SRishi Srivatsavai this->timeSince_Topo_Change = 0;
121*4eaa4710SRishi Srivatsavai } else {
122*4eaa4710SRishi Srivatsavai this->Topo_Change_Count = 0;
123*4eaa4710SRishi Srivatsavai this->timeSince_Topo_Change++;
124*4eaa4710SRishi Srivatsavai }
125*4eaa4710SRishi Srivatsavai }
126*4eaa4710SRishi Srivatsavai
127*4eaa4710SRishi Srivatsavai STPM_T*
STP_stpm_create(int vlan_id,char * name)128*4eaa4710SRishi Srivatsavai STP_stpm_create (int vlan_id, char* name)
129*4eaa4710SRishi Srivatsavai {
130*4eaa4710SRishi Srivatsavai STPM_T* this;
131*4eaa4710SRishi Srivatsavai
132*4eaa4710SRishi Srivatsavai STP_NEW_IN_LIST(this, STPM_T, bridges, "stp instance");
133*4eaa4710SRishi Srivatsavai
134*4eaa4710SRishi Srivatsavai this->admin_state = STP_DISABLED;
135*4eaa4710SRishi Srivatsavai
136*4eaa4710SRishi Srivatsavai this->vlan_id = vlan_id;
137*4eaa4710SRishi Srivatsavai if (name) {
138*4eaa4710SRishi Srivatsavai STP_STRDUP(this->name, name, "stp bridge name");
139*4eaa4710SRishi Srivatsavai }
140*4eaa4710SRishi Srivatsavai
141*4eaa4710SRishi Srivatsavai this->machines = NULL;
142*4eaa4710SRishi Srivatsavai this->ports = NULL;
143*4eaa4710SRishi Srivatsavai
144*4eaa4710SRishi Srivatsavai STP_STATE_MACH_IN_LIST(rolesel);
145*4eaa4710SRishi Srivatsavai
146*4eaa4710SRishi Srivatsavai #ifdef STP_DBG
147*4eaa4710SRishi Srivatsavai /* this->rolesel->debug = 2; */
148*4eaa4710SRishi Srivatsavai #endif
149*4eaa4710SRishi Srivatsavai
150*4eaa4710SRishi Srivatsavai return this;
151*4eaa4710SRishi Srivatsavai }
152*4eaa4710SRishi Srivatsavai
153*4eaa4710SRishi Srivatsavai int
STP_stpm_enable(STPM_T * this,UID_STP_MODE_T admin_state)154*4eaa4710SRishi Srivatsavai STP_stpm_enable (STPM_T* this, UID_STP_MODE_T admin_state)
155*4eaa4710SRishi Srivatsavai {
156*4eaa4710SRishi Srivatsavai int rc = 0;
157*4eaa4710SRishi Srivatsavai
158*4eaa4710SRishi Srivatsavai if (admin_state == this->admin_state) {
159*4eaa4710SRishi Srivatsavai /* nothing to do :) */
160*4eaa4710SRishi Srivatsavai return 0;
161*4eaa4710SRishi Srivatsavai }
162*4eaa4710SRishi Srivatsavai
163*4eaa4710SRishi Srivatsavai if (STP_ENABLED == admin_state) {
164*4eaa4710SRishi Srivatsavai if (this->ports)
165*4eaa4710SRishi Srivatsavai rc = STP_stpm_start (this);
166*4eaa4710SRishi Srivatsavai this->admin_state = admin_state;
167*4eaa4710SRishi Srivatsavai } else {
168*4eaa4710SRishi Srivatsavai this->admin_state = admin_state;
169*4eaa4710SRishi Srivatsavai STP_stpm_stop (this);
170*4eaa4710SRishi Srivatsavai }
171*4eaa4710SRishi Srivatsavai
172*4eaa4710SRishi Srivatsavai return rc;
173*4eaa4710SRishi Srivatsavai }
174*4eaa4710SRishi Srivatsavai
175*4eaa4710SRishi Srivatsavai void
STP_stpm_delete(STPM_T * this)176*4eaa4710SRishi Srivatsavai STP_stpm_delete (STPM_T* this)
177*4eaa4710SRishi Srivatsavai {
178*4eaa4710SRishi Srivatsavai register STPM_T* tmp;
179*4eaa4710SRishi Srivatsavai register STPM_T* prev;
180*4eaa4710SRishi Srivatsavai register STATE_MACH_T* stater;
181*4eaa4710SRishi Srivatsavai register PORT_T* port;
182*4eaa4710SRishi Srivatsavai register void* pv;
183*4eaa4710SRishi Srivatsavai
184*4eaa4710SRishi Srivatsavai (void) STP_stpm_enable (this, STP_DISABLED);
185*4eaa4710SRishi Srivatsavai
186*4eaa4710SRishi Srivatsavai for (stater = this->machines; stater; ) {
187*4eaa4710SRishi Srivatsavai pv = (void*) stater->next;
188*4eaa4710SRishi Srivatsavai STP_state_mach_delete (stater);
189*4eaa4710SRishi Srivatsavai this->machines = stater = (STATE_MACH_T*) pv;
190*4eaa4710SRishi Srivatsavai }
191*4eaa4710SRishi Srivatsavai
192*4eaa4710SRishi Srivatsavai for (port = this->ports; port; ) {
193*4eaa4710SRishi Srivatsavai pv = (void*) port->next;
194*4eaa4710SRishi Srivatsavai STP_port_delete (port);
195*4eaa4710SRishi Srivatsavai this->ports = port = (PORT_T*) pv;
196*4eaa4710SRishi Srivatsavai }
197*4eaa4710SRishi Srivatsavai
198*4eaa4710SRishi Srivatsavai prev = NULL;
199*4eaa4710SRishi Srivatsavai for (tmp = bridges; tmp; tmp = tmp->next) {
200*4eaa4710SRishi Srivatsavai if (tmp->vlan_id == this->vlan_id) {
201*4eaa4710SRishi Srivatsavai if (prev) {
202*4eaa4710SRishi Srivatsavai prev->next = this->next;
203*4eaa4710SRishi Srivatsavai } else {
204*4eaa4710SRishi Srivatsavai bridges = this->next;
205*4eaa4710SRishi Srivatsavai }
206*4eaa4710SRishi Srivatsavai
207*4eaa4710SRishi Srivatsavai if (this->name)
208*4eaa4710SRishi Srivatsavai STP_FREE(this->name, "stp bridge name");
209*4eaa4710SRishi Srivatsavai STP_FREE(this, "stp instance");
210*4eaa4710SRishi Srivatsavai break;
211*4eaa4710SRishi Srivatsavai }
212*4eaa4710SRishi Srivatsavai prev = tmp;
213*4eaa4710SRishi Srivatsavai }
214*4eaa4710SRishi Srivatsavai }
215*4eaa4710SRishi Srivatsavai
216*4eaa4710SRishi Srivatsavai int
STP_stpm_start(STPM_T * this)217*4eaa4710SRishi Srivatsavai STP_stpm_start (STPM_T* this)
218*4eaa4710SRishi Srivatsavai {
219*4eaa4710SRishi Srivatsavai register PORT_T* port;
220*4eaa4710SRishi Srivatsavai
221*4eaa4710SRishi Srivatsavai if (! this->ports) { /* there are not any ports :( */
222*4eaa4710SRishi Srivatsavai return STP_There_Are_No_Ports;
223*4eaa4710SRishi Srivatsavai }
224*4eaa4710SRishi Srivatsavai
225*4eaa4710SRishi Srivatsavai if (! STP_compute_bridge_id (this)) {/* can't compute bridge id ? :( */
226*4eaa4710SRishi Srivatsavai return STP_Cannot_Compute_Bridge_Prio;
227*4eaa4710SRishi Srivatsavai }
228*4eaa4710SRishi Srivatsavai
229*4eaa4710SRishi Srivatsavai /* check, that the stpm has unique bridge Id */
230*4eaa4710SRishi Srivatsavai if (0 != STP_stpm_check_bridge_priority (this)) {
231*4eaa4710SRishi Srivatsavai /* there is an enabled bridge with same ID :( */
232*4eaa4710SRishi Srivatsavai return STP_Invalid_Bridge_Priority;
233*4eaa4710SRishi Srivatsavai }
234*4eaa4710SRishi Srivatsavai
235*4eaa4710SRishi Srivatsavai _stp_stpm_init_data (this);
236*4eaa4710SRishi Srivatsavai
237*4eaa4710SRishi Srivatsavai for (port = this->ports; port; port = port->next) {
238*4eaa4710SRishi Srivatsavai STP_port_init (port, this, True);
239*4eaa4710SRishi Srivatsavai }
240*4eaa4710SRishi Srivatsavai
241*4eaa4710SRishi Srivatsavai #ifndef STRONGLY_SPEC_802_1W
242*4eaa4710SRishi Srivatsavai /* A. see comment near STRONGLY_SPEC_802_1W in topoch.c */
243*4eaa4710SRishi Srivatsavai /* B. port=0 here means: delete for all ports */
244*4eaa4710SRishi Srivatsavai #ifdef STP_DBG
245*4eaa4710SRishi Srivatsavai stp_trace("%s (all, start stpm)",
246*4eaa4710SRishi Srivatsavai "clearFDB");
247*4eaa4710SRishi Srivatsavai #endif
248*4eaa4710SRishi Srivatsavai
249*4eaa4710SRishi Srivatsavai STP_OUT_flush_lt (0, this->vlan_id, LT_FLASH_ONLY_THE_PORT, "start stpm");
250*4eaa4710SRishi Srivatsavai #endif
251*4eaa4710SRishi Srivatsavai
252*4eaa4710SRishi Srivatsavai (void) _stp_stpm_iterate_machines (this, _stp_stpm_init_machine, False);
253*4eaa4710SRishi Srivatsavai (void) STP_stpm_update (this);
254*4eaa4710SRishi Srivatsavai
255*4eaa4710SRishi Srivatsavai return 0;
256*4eaa4710SRishi Srivatsavai }
257*4eaa4710SRishi Srivatsavai
258*4eaa4710SRishi Srivatsavai /* ARGSUSED */
259*4eaa4710SRishi Srivatsavai void
STP_stpm_stop(STPM_T * this)260*4eaa4710SRishi Srivatsavai STP_stpm_stop (STPM_T* this)
261*4eaa4710SRishi Srivatsavai {
262*4eaa4710SRishi Srivatsavai }
263*4eaa4710SRishi Srivatsavai
264*4eaa4710SRishi Srivatsavai int
STP_stpm_update(STPM_T * this)265*4eaa4710SRishi Srivatsavai STP_stpm_update (STPM_T* this) /* returns number of loops */
266*4eaa4710SRishi Srivatsavai {
267*4eaa4710SRishi Srivatsavai register Bool need_state_change;
268*4eaa4710SRishi Srivatsavai register int number_of_loops = 0;
269*4eaa4710SRishi Srivatsavai
270*4eaa4710SRishi Srivatsavai need_state_change = False;
271*4eaa4710SRishi Srivatsavai
272*4eaa4710SRishi Srivatsavai for (;;) {/* loop until not need changes */
273*4eaa4710SRishi Srivatsavai need_state_change = _stp_stpm_iterate_machines (this,
274*4eaa4710SRishi Srivatsavai STP_check_condition,
275*4eaa4710SRishi Srivatsavai True);
276*4eaa4710SRishi Srivatsavai if (! need_state_change) break;
277*4eaa4710SRishi Srivatsavai
278*4eaa4710SRishi Srivatsavai number_of_loops++;
279*4eaa4710SRishi Srivatsavai /* here we know, that at least one stater must be
280*4eaa4710SRishi Srivatsavai updated (it has changed state) */
281*4eaa4710SRishi Srivatsavai number_of_loops += _stp_stpm_iterate_machines (this,
282*4eaa4710SRishi Srivatsavai STP_change_state,
283*4eaa4710SRishi Srivatsavai False);
284*4eaa4710SRishi Srivatsavai
285*4eaa4710SRishi Srivatsavai }
286*4eaa4710SRishi Srivatsavai
287*4eaa4710SRishi Srivatsavai return number_of_loops;
288*4eaa4710SRishi Srivatsavai }
289*4eaa4710SRishi Srivatsavai
290*4eaa4710SRishi Srivatsavai BRIDGE_ID *
STP_compute_bridge_id(STPM_T * this)291*4eaa4710SRishi Srivatsavai STP_compute_bridge_id (STPM_T* this)
292*4eaa4710SRishi Srivatsavai {
293*4eaa4710SRishi Srivatsavai register PORT_T* port;
294*4eaa4710SRishi Srivatsavai register PORT_T* min_num_port = NULL;
295*4eaa4710SRishi Srivatsavai int port_index = 0;
296*4eaa4710SRishi Srivatsavai
297*4eaa4710SRishi Srivatsavai for (port = this->ports; port; port = port->next) {
298*4eaa4710SRishi Srivatsavai if (! port_index || port->port_index < port_index) {
299*4eaa4710SRishi Srivatsavai min_num_port = port;
300*4eaa4710SRishi Srivatsavai port_index = port->port_index;
301*4eaa4710SRishi Srivatsavai }
302*4eaa4710SRishi Srivatsavai }
303*4eaa4710SRishi Srivatsavai
304*4eaa4710SRishi Srivatsavai if (! min_num_port) return NULL; /* IMHO, it may not be */
305*4eaa4710SRishi Srivatsavai
306*4eaa4710SRishi Srivatsavai STP_OUT_get_port_mac (min_num_port->port_index, this->BrId.addr);
307*4eaa4710SRishi Srivatsavai
308*4eaa4710SRishi Srivatsavai return &this->BrId;
309*4eaa4710SRishi Srivatsavai }
310*4eaa4710SRishi Srivatsavai
311*4eaa4710SRishi Srivatsavai STPM_T*
STP_stpm_get_the_list(void)312*4eaa4710SRishi Srivatsavai STP_stpm_get_the_list (void)
313*4eaa4710SRishi Srivatsavai {
314*4eaa4710SRishi Srivatsavai return bridges;
315*4eaa4710SRishi Srivatsavai }
316*4eaa4710SRishi Srivatsavai
317*4eaa4710SRishi Srivatsavai void
STP_stpm_update_after_bridge_management(STPM_T * this)318*4eaa4710SRishi Srivatsavai STP_stpm_update_after_bridge_management (STPM_T* this)
319*4eaa4710SRishi Srivatsavai {
320*4eaa4710SRishi Srivatsavai register PORT_T* port;
321*4eaa4710SRishi Srivatsavai
322*4eaa4710SRishi Srivatsavai for (port = this->ports; port; port = port->next) {
323*4eaa4710SRishi Srivatsavai port->reselect = True;
324*4eaa4710SRishi Srivatsavai port->selected = False;
325*4eaa4710SRishi Srivatsavai }
326*4eaa4710SRishi Srivatsavai }
327*4eaa4710SRishi Srivatsavai
328*4eaa4710SRishi Srivatsavai int
STP_stpm_check_bridge_priority(STPM_T * this)329*4eaa4710SRishi Srivatsavai STP_stpm_check_bridge_priority (STPM_T* this)
330*4eaa4710SRishi Srivatsavai {
331*4eaa4710SRishi Srivatsavai register STPM_T* oth;
332*4eaa4710SRishi Srivatsavai
333*4eaa4710SRishi Srivatsavai for (oth = bridges; oth; oth = oth->next) {
334*4eaa4710SRishi Srivatsavai if (STP_ENABLED == oth->admin_state && oth != this &&
335*4eaa4710SRishi Srivatsavai ! STP_VECT_compare_bridge_id (&this->BrId, &oth->BrId)) {
336*4eaa4710SRishi Srivatsavai return STP_Invalid_Bridge_Priority;
337*4eaa4710SRishi Srivatsavai }
338*4eaa4710SRishi Srivatsavai }
339*4eaa4710SRishi Srivatsavai
340*4eaa4710SRishi Srivatsavai return 0;
341*4eaa4710SRishi Srivatsavai }
342*4eaa4710SRishi Srivatsavai
343*4eaa4710SRishi Srivatsavai const char*
STP_stpm_get_port_name_by_id(STPM_T * this,PORT_ID port_id)344*4eaa4710SRishi Srivatsavai STP_stpm_get_port_name_by_id (STPM_T* this, PORT_ID port_id)
345*4eaa4710SRishi Srivatsavai {
346*4eaa4710SRishi Srivatsavai register PORT_T* port;
347*4eaa4710SRishi Srivatsavai
348*4eaa4710SRishi Srivatsavai for (port = this->ports; port; port = port->next) {
349*4eaa4710SRishi Srivatsavai if (port_id == port->port_id) {
350*4eaa4710SRishi Srivatsavai return port->port_name;
351*4eaa4710SRishi Srivatsavai }
352*4eaa4710SRishi Srivatsavai }
353*4eaa4710SRishi Srivatsavai
354*4eaa4710SRishi Srivatsavai return "Undef?";
355*4eaa4710SRishi Srivatsavai }
356*4eaa4710SRishi Srivatsavai
357*4eaa4710SRishi Srivatsavai
358*4eaa4710SRishi Srivatsavai
359*4eaa4710SRishi Srivatsavai
360*4eaa4710SRishi Srivatsavai
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