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 /* "Times" API : bridgeTime, rootTimes, portTimes, designatedTimes, msgTimes */
24*55fea89dSDan Cross
254eaa4710SRishi Srivatsavai #include "base.h"
264eaa4710SRishi Srivatsavai
274eaa4710SRishi Srivatsavai int
STP_compare_times(IN TIMEVALUES_T * t1,IN TIMEVALUES_T * t2)284eaa4710SRishi Srivatsavai STP_compare_times (IN TIMEVALUES_T *t1, IN TIMEVALUES_T *t2)
294eaa4710SRishi Srivatsavai {
304eaa4710SRishi Srivatsavai if (t1->MessageAge < t2->MessageAge) return -1;
314eaa4710SRishi Srivatsavai if (t1->MessageAge > t2->MessageAge) return 1;
324eaa4710SRishi Srivatsavai
334eaa4710SRishi Srivatsavai if (t1->MaxAge < t2->MaxAge) return -2;
344eaa4710SRishi Srivatsavai if (t1->MaxAge > t2->MaxAge) return 2;
354eaa4710SRishi Srivatsavai
364eaa4710SRishi Srivatsavai if (t1->ForwardDelay < t2->ForwardDelay) return -3;
374eaa4710SRishi Srivatsavai if (t1->ForwardDelay > t2->ForwardDelay) return 3;
384eaa4710SRishi Srivatsavai
394eaa4710SRishi Srivatsavai if (t1->HelloTime < t2->HelloTime) return -4;
404eaa4710SRishi Srivatsavai if (t1->HelloTime > t2->HelloTime) return 4;
414eaa4710SRishi Srivatsavai
424eaa4710SRishi Srivatsavai return 0;
434eaa4710SRishi Srivatsavai }
444eaa4710SRishi Srivatsavai
454eaa4710SRishi Srivatsavai void
STP_get_times(IN BPDU_BODY_T * b,OUT TIMEVALUES_T * v)464eaa4710SRishi Srivatsavai STP_get_times (IN BPDU_BODY_T *b, OUT TIMEVALUES_T *v)
474eaa4710SRishi Srivatsavai {
484eaa4710SRishi Srivatsavai /* LINTED: alignment */
494eaa4710SRishi Srivatsavai v->MessageAge = ntohs (*((unsigned short*) b->message_age)) >> 8;
504eaa4710SRishi Srivatsavai /* LINTED: alignment */
514eaa4710SRishi Srivatsavai v->MaxAge = ntohs (*((unsigned short*) b->max_age)) >> 8;
524eaa4710SRishi Srivatsavai /* LINTED: alignment */
534eaa4710SRishi Srivatsavai v->ForwardDelay = ntohs (*((unsigned short*) b->forward_delay)) >> 8;
544eaa4710SRishi Srivatsavai /* LINTED: alignment */
554eaa4710SRishi Srivatsavai v->HelloTime = ntohs (*((unsigned short*) b->hello_time)) >> 8;
564eaa4710SRishi Srivatsavai }
574eaa4710SRishi Srivatsavai
584eaa4710SRishi Srivatsavai void
STP_set_times(IN TIMEVALUES_T * v,OUT BPDU_BODY_T * b)594eaa4710SRishi Srivatsavai STP_set_times (IN TIMEVALUES_T *v, OUT BPDU_BODY_T *b)
604eaa4710SRishi Srivatsavai {
614eaa4710SRishi Srivatsavai unsigned short mt;
624eaa4710SRishi Srivatsavai #define STP_SET_TIME(f, t) \
634eaa4710SRishi Srivatsavai mt = htons (f << 8); \
64*55fea89dSDan Cross (void) memcpy (t, &mt, 2);
65*55fea89dSDan Cross
664eaa4710SRishi Srivatsavai STP_SET_TIME(v->MessageAge, b->message_age);
674eaa4710SRishi Srivatsavai STP_SET_TIME(v->MaxAge, b->max_age);
684eaa4710SRishi Srivatsavai STP_SET_TIME(v->ForwardDelay, b->forward_delay);
694eaa4710SRishi Srivatsavai STP_SET_TIME(v->HelloTime, b->hello_time);
704eaa4710SRishi Srivatsavai }
714eaa4710SRishi Srivatsavai
72*55fea89dSDan Cross void
STP_copy_times(OUT TIMEVALUES_T * t,IN TIMEVALUES_T * f)734eaa4710SRishi Srivatsavai STP_copy_times (OUT TIMEVALUES_T *t, IN TIMEVALUES_T *f)
744eaa4710SRishi Srivatsavai {
754eaa4710SRishi Srivatsavai t->MessageAge = f->MessageAge;
764eaa4710SRishi Srivatsavai t->MaxAge = f->MaxAge;
774eaa4710SRishi Srivatsavai t->ForwardDelay = f->ForwardDelay;
784eaa4710SRishi Srivatsavai t->HelloTime = f->HelloTime;
794eaa4710SRishi Srivatsavai }
804eaa4710SRishi Srivatsavai
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