1*10491SRishi.Srivatsavai@Sun.COM /************************************************************************
2*10491SRishi.Srivatsavai@Sun.COM * RSTP library - Rapid Spanning Tree (802.1t, 802.1w)
3*10491SRishi.Srivatsavai@Sun.COM * Copyright (C) 2001-2003 Optical Access
4*10491SRishi.Srivatsavai@Sun.COM * Author: Alex Rozin
5*10491SRishi.Srivatsavai@Sun.COM *
6*10491SRishi.Srivatsavai@Sun.COM * This file is part of RSTP library.
7*10491SRishi.Srivatsavai@Sun.COM *
8*10491SRishi.Srivatsavai@Sun.COM * RSTP library is free software; you can redistribute it and/or modify it
9*10491SRishi.Srivatsavai@Sun.COM * under the terms of the GNU Lesser General Public License as published by the
10*10491SRishi.Srivatsavai@Sun.COM * Free Software Foundation; version 2.1
11*10491SRishi.Srivatsavai@Sun.COM *
12*10491SRishi.Srivatsavai@Sun.COM * RSTP library is distributed in the hope that it will be useful, but
13*10491SRishi.Srivatsavai@Sun.COM * WITHOUT ANY WARRANTY; without even the implied warranty of
14*10491SRishi.Srivatsavai@Sun.COM * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
15*10491SRishi.Srivatsavai@Sun.COM * General Public License for more details.
16*10491SRishi.Srivatsavai@Sun.COM *
17*10491SRishi.Srivatsavai@Sun.COM * You should have received a copy of the GNU Lesser General Public License
18*10491SRishi.Srivatsavai@Sun.COM * along with RSTP library; see the file COPYING. If not, write to the Free
19*10491SRishi.Srivatsavai@Sun.COM * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
20*10491SRishi.Srivatsavai@Sun.COM * 02111-1307, USA.
21*10491SRishi.Srivatsavai@Sun.COM **********************************************************************/
22*10491SRishi.Srivatsavai@Sun.COM
23*10491SRishi.Srivatsavai@Sun.COM /* "Times" API : bridgeTime, rootTimes, portTimes, designatedTimes, msgTimes */
24*10491SRishi.Srivatsavai@Sun.COM
25*10491SRishi.Srivatsavai@Sun.COM #include "base.h"
26*10491SRishi.Srivatsavai@Sun.COM
27*10491SRishi.Srivatsavai@Sun.COM int
STP_compare_times(IN TIMEVALUES_T * t1,IN TIMEVALUES_T * t2)28*10491SRishi.Srivatsavai@Sun.COM STP_compare_times (IN TIMEVALUES_T *t1, IN TIMEVALUES_T *t2)
29*10491SRishi.Srivatsavai@Sun.COM {
30*10491SRishi.Srivatsavai@Sun.COM if (t1->MessageAge < t2->MessageAge) return -1;
31*10491SRishi.Srivatsavai@Sun.COM if (t1->MessageAge > t2->MessageAge) return 1;
32*10491SRishi.Srivatsavai@Sun.COM
33*10491SRishi.Srivatsavai@Sun.COM if (t1->MaxAge < t2->MaxAge) return -2;
34*10491SRishi.Srivatsavai@Sun.COM if (t1->MaxAge > t2->MaxAge) return 2;
35*10491SRishi.Srivatsavai@Sun.COM
36*10491SRishi.Srivatsavai@Sun.COM if (t1->ForwardDelay < t2->ForwardDelay) return -3;
37*10491SRishi.Srivatsavai@Sun.COM if (t1->ForwardDelay > t2->ForwardDelay) return 3;
38*10491SRishi.Srivatsavai@Sun.COM
39*10491SRishi.Srivatsavai@Sun.COM if (t1->HelloTime < t2->HelloTime) return -4;
40*10491SRishi.Srivatsavai@Sun.COM if (t1->HelloTime > t2->HelloTime) return 4;
41*10491SRishi.Srivatsavai@Sun.COM
42*10491SRishi.Srivatsavai@Sun.COM return 0;
43*10491SRishi.Srivatsavai@Sun.COM }
44*10491SRishi.Srivatsavai@Sun.COM
45*10491SRishi.Srivatsavai@Sun.COM void
STP_get_times(IN BPDU_BODY_T * b,OUT TIMEVALUES_T * v)46*10491SRishi.Srivatsavai@Sun.COM STP_get_times (IN BPDU_BODY_T *b, OUT TIMEVALUES_T *v)
47*10491SRishi.Srivatsavai@Sun.COM {
48*10491SRishi.Srivatsavai@Sun.COM /* LINTED: alignment */
49*10491SRishi.Srivatsavai@Sun.COM v->MessageAge = ntohs (*((unsigned short*) b->message_age)) >> 8;
50*10491SRishi.Srivatsavai@Sun.COM /* LINTED: alignment */
51*10491SRishi.Srivatsavai@Sun.COM v->MaxAge = ntohs (*((unsigned short*) b->max_age)) >> 8;
52*10491SRishi.Srivatsavai@Sun.COM /* LINTED: alignment */
53*10491SRishi.Srivatsavai@Sun.COM v->ForwardDelay = ntohs (*((unsigned short*) b->forward_delay)) >> 8;
54*10491SRishi.Srivatsavai@Sun.COM /* LINTED: alignment */
55*10491SRishi.Srivatsavai@Sun.COM v->HelloTime = ntohs (*((unsigned short*) b->hello_time)) >> 8;
56*10491SRishi.Srivatsavai@Sun.COM }
57*10491SRishi.Srivatsavai@Sun.COM
58*10491SRishi.Srivatsavai@Sun.COM void
STP_set_times(IN TIMEVALUES_T * v,OUT BPDU_BODY_T * b)59*10491SRishi.Srivatsavai@Sun.COM STP_set_times (IN TIMEVALUES_T *v, OUT BPDU_BODY_T *b)
60*10491SRishi.Srivatsavai@Sun.COM {
61*10491SRishi.Srivatsavai@Sun.COM unsigned short mt;
62*10491SRishi.Srivatsavai@Sun.COM #define STP_SET_TIME(f, t) \
63*10491SRishi.Srivatsavai@Sun.COM mt = htons (f << 8); \
64*10491SRishi.Srivatsavai@Sun.COM (void) memcpy (t, &mt, 2);
65*10491SRishi.Srivatsavai@Sun.COM
66*10491SRishi.Srivatsavai@Sun.COM STP_SET_TIME(v->MessageAge, b->message_age);
67*10491SRishi.Srivatsavai@Sun.COM STP_SET_TIME(v->MaxAge, b->max_age);
68*10491SRishi.Srivatsavai@Sun.COM STP_SET_TIME(v->ForwardDelay, b->forward_delay);
69*10491SRishi.Srivatsavai@Sun.COM STP_SET_TIME(v->HelloTime, b->hello_time);
70*10491SRishi.Srivatsavai@Sun.COM }
71*10491SRishi.Srivatsavai@Sun.COM
72*10491SRishi.Srivatsavai@Sun.COM void
STP_copy_times(OUT TIMEVALUES_T * t,IN TIMEVALUES_T * f)73*10491SRishi.Srivatsavai@Sun.COM STP_copy_times (OUT TIMEVALUES_T *t, IN TIMEVALUES_T *f)
74*10491SRishi.Srivatsavai@Sun.COM {
75*10491SRishi.Srivatsavai@Sun.COM t->MessageAge = f->MessageAge;
76*10491SRishi.Srivatsavai@Sun.COM t->MaxAge = f->MaxAge;
77*10491SRishi.Srivatsavai@Sun.COM t->ForwardDelay = f->ForwardDelay;
78*10491SRishi.Srivatsavai@Sun.COM t->HelloTime = f->HelloTime;
79*10491SRishi.Srivatsavai@Sun.COM }
80*10491SRishi.Srivatsavai@Sun.COM
81