1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START
3*7c478bd9Sstevel@tonic-gate *
4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*7c478bd9Sstevel@tonic-gate * with the License.
8*7c478bd9Sstevel@tonic-gate *
9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions
12*7c478bd9Sstevel@tonic-gate * and limitations under the License.
13*7c478bd9Sstevel@tonic-gate *
14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*7c478bd9Sstevel@tonic-gate *
20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate */
22*7c478bd9Sstevel@tonic-gate /*
23*7c478bd9Sstevel@tonic-gate * Copyright 2003 Sun Microsystems, Inc. All rights reserved.
24*7c478bd9Sstevel@tonic-gate * Use is subject to license terms.
25*7c478bd9Sstevel@tonic-gate */
26*7c478bd9Sstevel@tonic-gate
27*7c478bd9Sstevel@tonic-gate /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
28*7c478bd9Sstevel@tonic-gate /* All Rights Reserved */
29*7c478bd9Sstevel@tonic-gate
30*7c478bd9Sstevel@tonic-gate /*
31*7c478bd9Sstevel@tonic-gate * Portions of this source code were derived from Berkeley 4.3 BSD
32*7c478bd9Sstevel@tonic-gate * under license from the Regents of the University of California.
33*7c478bd9Sstevel@tonic-gate */
34*7c478bd9Sstevel@tonic-gate
35*7c478bd9Sstevel@tonic-gate /*
36*7c478bd9Sstevel@tonic-gate * Routing Table Management Daemon
37*7c478bd9Sstevel@tonic-gate */
38*7c478bd9Sstevel@tonic-gate #include "defs.h"
39*7c478bd9Sstevel@tonic-gate
40*7c478bd9Sstevel@tonic-gate int supplyinterval; /* current supply interval */
41*7c478bd9Sstevel@tonic-gate
42*7c478bd9Sstevel@tonic-gate /*
43*7c478bd9Sstevel@tonic-gate * Timer routine. Performs routing information supply
44*7c478bd9Sstevel@tonic-gate * duties and manages timers on routing table entries.
45*7c478bd9Sstevel@tonic-gate * Management of the RTS_CHANGED bit assumes that we multicast
46*7c478bd9Sstevel@tonic-gate * each time called.
47*7c478bd9Sstevel@tonic-gate */
48*7c478bd9Sstevel@tonic-gate void
timer(void)49*7c478bd9Sstevel@tonic-gate timer(void)
50*7c478bd9Sstevel@tonic-gate {
51*7c478bd9Sstevel@tonic-gate struct rthash *rh;
52*7c478bd9Sstevel@tonic-gate struct rt_entry *rt;
53*7c478bd9Sstevel@tonic-gate boolean_t timetomulticast = _B_FALSE;
54*7c478bd9Sstevel@tonic-gate int i;
55*7c478bd9Sstevel@tonic-gate static int iftime; /* interface timer */
56*7c478bd9Sstevel@tonic-gate static int mtime; /* periodic mcast supply timer */
57*7c478bd9Sstevel@tonic-gate static int alarmtime = 0; /* time elapsed since last call */
58*7c478bd9Sstevel@tonic-gate int mintime; /* tracks when next timer will expire */
59*7c478bd9Sstevel@tonic-gate
60*7c478bd9Sstevel@tonic-gate /*
61*7c478bd9Sstevel@tonic-gate * On the initial call to timer(), the various times that are kept track
62*7c478bd9Sstevel@tonic-gate * of need to be initialized. After initializing everything, "remember"
63*7c478bd9Sstevel@tonic-gate * (via a static) how long until the next timer expires.
64*7c478bd9Sstevel@tonic-gate */
65*7c478bd9Sstevel@tonic-gate if (alarmtime == 0) {
66*7c478bd9Sstevel@tonic-gate supplyinterval = GET_RANDOM(MIN_SUPPLY_TIME, MAX_SUPPLY_TIME);
67*7c478bd9Sstevel@tonic-gate iftime = 0;
68*7c478bd9Sstevel@tonic-gate mtime = supplyinterval;
69*7c478bd9Sstevel@tonic-gate alarmtime = supplyinterval;
70*7c478bd9Sstevel@tonic-gate (void) alarm(alarmtime);
71*7c478bd9Sstevel@tonic-gate return;
72*7c478bd9Sstevel@tonic-gate }
73*7c478bd9Sstevel@tonic-gate
74*7c478bd9Sstevel@tonic-gate /*
75*7c478bd9Sstevel@tonic-gate * Initialize mintime to a suitable "large" value and then compare it to
76*7c478bd9Sstevel@tonic-gate * other times in the future to determine which event will occur next.
77*7c478bd9Sstevel@tonic-gate */
78*7c478bd9Sstevel@tonic-gate mintime = INT_MAX;
79*7c478bd9Sstevel@tonic-gate (void) sighold(SIGHUP);
80*7c478bd9Sstevel@tonic-gate (void) sighold(SIGUSR1);
81*7c478bd9Sstevel@tonic-gate (void) sighold(SIGUSR2);
82*7c478bd9Sstevel@tonic-gate
83*7c478bd9Sstevel@tonic-gate iftime += alarmtime;
84*7c478bd9Sstevel@tonic-gate if (iftime >= CHECK_INTERVAL) {
85*7c478bd9Sstevel@tonic-gate initifs();
86*7c478bd9Sstevel@tonic-gate iftime = 0;
87*7c478bd9Sstevel@tonic-gate }
88*7c478bd9Sstevel@tonic-gate mintime = min(mintime, CHECK_INTERVAL - iftime);
89*7c478bd9Sstevel@tonic-gate
90*7c478bd9Sstevel@tonic-gate mtime += alarmtime;
91*7c478bd9Sstevel@tonic-gate if (mtime >= supplyinterval) {
92*7c478bd9Sstevel@tonic-gate if (supplier)
93*7c478bd9Sstevel@tonic-gate timetomulticast = _B_TRUE;
94*7c478bd9Sstevel@tonic-gate mtime = 0;
95*7c478bd9Sstevel@tonic-gate supplyinterval = GET_RANDOM(MIN_SUPPLY_TIME, MAX_SUPPLY_TIME);
96*7c478bd9Sstevel@tonic-gate }
97*7c478bd9Sstevel@tonic-gate mintime = min(mintime, supplyinterval - mtime);
98*7c478bd9Sstevel@tonic-gate
99*7c478bd9Sstevel@tonic-gate for (i = IPV6_ABITS; i >= 0; i--) {
100*7c478bd9Sstevel@tonic-gate if (net_hashes[i] == NULL)
101*7c478bd9Sstevel@tonic-gate continue;
102*7c478bd9Sstevel@tonic-gate
103*7c478bd9Sstevel@tonic-gate for (rh = net_hashes[i];
104*7c478bd9Sstevel@tonic-gate rh < &net_hashes[i][ROUTEHASHSIZ]; rh++) {
105*7c478bd9Sstevel@tonic-gate for (rt = rh->rt_forw; rt != (struct rt_entry *)rh;
106*7c478bd9Sstevel@tonic-gate rt = rt->rt_forw) {
107*7c478bd9Sstevel@tonic-gate /*
108*7c478bd9Sstevel@tonic-gate * We don't advance time on a routing entry for
109*7c478bd9Sstevel@tonic-gate * an interface because we catch
110*7c478bd9Sstevel@tonic-gate * interfaces going up and down in initifs.
111*7c478bd9Sstevel@tonic-gate */
112*7c478bd9Sstevel@tonic-gate rt->rt_state &= ~RTS_CHANGED;
113*7c478bd9Sstevel@tonic-gate if ((rt->rt_state & RTS_INTERFACE) != 0)
114*7c478bd9Sstevel@tonic-gate continue;
115*7c478bd9Sstevel@tonic-gate rt->rt_timer += alarmtime;
116*7c478bd9Sstevel@tonic-gate if (rt->rt_timer >= GARBAGE_TIME) {
117*7c478bd9Sstevel@tonic-gate rt = rt->rt_back;
118*7c478bd9Sstevel@tonic-gate rtdelete(rt->rt_forw);
119*7c478bd9Sstevel@tonic-gate continue;
120*7c478bd9Sstevel@tonic-gate }
121*7c478bd9Sstevel@tonic-gate if (rt->rt_timer >= EXPIRE_TIME) {
122*7c478bd9Sstevel@tonic-gate rtdown(rt);
123*7c478bd9Sstevel@tonic-gate mintime = min(mintime,
124*7c478bd9Sstevel@tonic-gate GARBAGE_TIME - rt->rt_timer);
125*7c478bd9Sstevel@tonic-gate } else {
126*7c478bd9Sstevel@tonic-gate mintime = min(mintime,
127*7c478bd9Sstevel@tonic-gate EXPIRE_TIME - rt->rt_timer);
128*7c478bd9Sstevel@tonic-gate }
129*7c478bd9Sstevel@tonic-gate }
130*7c478bd9Sstevel@tonic-gate }
131*7c478bd9Sstevel@tonic-gate }
132*7c478bd9Sstevel@tonic-gate
133*7c478bd9Sstevel@tonic-gate if (timetomulticast) {
134*7c478bd9Sstevel@tonic-gate supplyall(&allrouters, 0, (struct interface *)NULL, _B_TRUE);
135*7c478bd9Sstevel@tonic-gate (void) gettimeofday(&now, (struct timezone *)NULL);
136*7c478bd9Sstevel@tonic-gate lastmcast = now;
137*7c478bd9Sstevel@tonic-gate lastfullupdate = now;
138*7c478bd9Sstevel@tonic-gate needupdate = _B_FALSE; /* cancel any pending dynamic update */
139*7c478bd9Sstevel@tonic-gate nextmcast.tv_sec = 0;
140*7c478bd9Sstevel@tonic-gate }
141*7c478bd9Sstevel@tonic-gate (void) sigrelse(SIGUSR2);
142*7c478bd9Sstevel@tonic-gate (void) sigrelse(SIGUSR1);
143*7c478bd9Sstevel@tonic-gate (void) sigrelse(SIGHUP);
144*7c478bd9Sstevel@tonic-gate
145*7c478bd9Sstevel@tonic-gate /*
146*7c478bd9Sstevel@tonic-gate * "Remember" (via a static) how long until the next timer expires.
147*7c478bd9Sstevel@tonic-gate */
148*7c478bd9Sstevel@tonic-gate alarmtime = mintime;
149*7c478bd9Sstevel@tonic-gate (void) alarm(alarmtime);
150*7c478bd9Sstevel@tonic-gate }
151*7c478bd9Sstevel@tonic-gate
152*7c478bd9Sstevel@tonic-gate /*
153*7c478bd9Sstevel@tonic-gate * On SIGTERM, let everyone know we're going away.
154*7c478bd9Sstevel@tonic-gate */
155*7c478bd9Sstevel@tonic-gate void
term(void)156*7c478bd9Sstevel@tonic-gate term(void)
157*7c478bd9Sstevel@tonic-gate {
158*7c478bd9Sstevel@tonic-gate struct rthash *rh;
159*7c478bd9Sstevel@tonic-gate struct rt_entry *rt;
160*7c478bd9Sstevel@tonic-gate int i;
161*7c478bd9Sstevel@tonic-gate
162*7c478bd9Sstevel@tonic-gate if (!supplier)
163*7c478bd9Sstevel@tonic-gate exit(EXIT_SUCCESS);
164*7c478bd9Sstevel@tonic-gate for (i = IPV6_ABITS; i >= 0; i--) {
165*7c478bd9Sstevel@tonic-gate if (net_hashes[i] == NULL)
166*7c478bd9Sstevel@tonic-gate continue;
167*7c478bd9Sstevel@tonic-gate
168*7c478bd9Sstevel@tonic-gate for (rh = net_hashes[i]; rh < &net_hashes[i][ROUTEHASHSIZ];
169*7c478bd9Sstevel@tonic-gate rh++) {
170*7c478bd9Sstevel@tonic-gate for (rt = rh->rt_forw; rt != (struct rt_entry *)rh;
171*7c478bd9Sstevel@tonic-gate rt = rt->rt_forw) {
172*7c478bd9Sstevel@tonic-gate rt->rt_metric = HOPCNT_INFINITY;
173*7c478bd9Sstevel@tonic-gate }
174*7c478bd9Sstevel@tonic-gate }
175*7c478bd9Sstevel@tonic-gate }
176*7c478bd9Sstevel@tonic-gate supplyall(&allrouters, 0, (struct interface *)NULL, _B_TRUE);
177*7c478bd9Sstevel@tonic-gate (void) unlink(PATH_PID);
178*7c478bd9Sstevel@tonic-gate exit(EXIT_SUCCESS);
179*7c478bd9Sstevel@tonic-gate }
180