1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright 2003 Sun Microsystems, Inc. All rights reserved.
24*0Sstevel@tonic-gate * Use is subject to license terms.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
28*0Sstevel@tonic-gate /* All Rights Reserved */
29*0Sstevel@tonic-gate
30*0Sstevel@tonic-gate /*
31*0Sstevel@tonic-gate * Portions of this source code were derived from Berkeley 4.3 BSD
32*0Sstevel@tonic-gate * under license from the Regents of the University of California.
33*0Sstevel@tonic-gate */
34*0Sstevel@tonic-gate
35*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
36*0Sstevel@tonic-gate
37*0Sstevel@tonic-gate /*
38*0Sstevel@tonic-gate * Routing Table Management Daemon
39*0Sstevel@tonic-gate */
40*0Sstevel@tonic-gate #include "defs.h"
41*0Sstevel@tonic-gate
42*0Sstevel@tonic-gate int supplyinterval; /* current supply interval */
43*0Sstevel@tonic-gate
44*0Sstevel@tonic-gate /*
45*0Sstevel@tonic-gate * Timer routine. Performs routing information supply
46*0Sstevel@tonic-gate * duties and manages timers on routing table entries.
47*0Sstevel@tonic-gate * Management of the RTS_CHANGED bit assumes that we multicast
48*0Sstevel@tonic-gate * each time called.
49*0Sstevel@tonic-gate */
50*0Sstevel@tonic-gate void
timer(void)51*0Sstevel@tonic-gate timer(void)
52*0Sstevel@tonic-gate {
53*0Sstevel@tonic-gate struct rthash *rh;
54*0Sstevel@tonic-gate struct rt_entry *rt;
55*0Sstevel@tonic-gate boolean_t timetomulticast = _B_FALSE;
56*0Sstevel@tonic-gate int i;
57*0Sstevel@tonic-gate static int iftime; /* interface timer */
58*0Sstevel@tonic-gate static int mtime; /* periodic mcast supply timer */
59*0Sstevel@tonic-gate static int alarmtime = 0; /* time elapsed since last call */
60*0Sstevel@tonic-gate int mintime; /* tracks when next timer will expire */
61*0Sstevel@tonic-gate
62*0Sstevel@tonic-gate /*
63*0Sstevel@tonic-gate * On the initial call to timer(), the various times that are kept track
64*0Sstevel@tonic-gate * of need to be initialized. After initializing everything, "remember"
65*0Sstevel@tonic-gate * (via a static) how long until the next timer expires.
66*0Sstevel@tonic-gate */
67*0Sstevel@tonic-gate if (alarmtime == 0) {
68*0Sstevel@tonic-gate supplyinterval = GET_RANDOM(MIN_SUPPLY_TIME, MAX_SUPPLY_TIME);
69*0Sstevel@tonic-gate iftime = 0;
70*0Sstevel@tonic-gate mtime = supplyinterval;
71*0Sstevel@tonic-gate alarmtime = supplyinterval;
72*0Sstevel@tonic-gate (void) alarm(alarmtime);
73*0Sstevel@tonic-gate return;
74*0Sstevel@tonic-gate }
75*0Sstevel@tonic-gate
76*0Sstevel@tonic-gate /*
77*0Sstevel@tonic-gate * Initialize mintime to a suitable "large" value and then compare it to
78*0Sstevel@tonic-gate * other times in the future to determine which event will occur next.
79*0Sstevel@tonic-gate */
80*0Sstevel@tonic-gate mintime = INT_MAX;
81*0Sstevel@tonic-gate (void) sighold(SIGHUP);
82*0Sstevel@tonic-gate (void) sighold(SIGUSR1);
83*0Sstevel@tonic-gate (void) sighold(SIGUSR2);
84*0Sstevel@tonic-gate
85*0Sstevel@tonic-gate iftime += alarmtime;
86*0Sstevel@tonic-gate if (iftime >= CHECK_INTERVAL) {
87*0Sstevel@tonic-gate initifs();
88*0Sstevel@tonic-gate iftime = 0;
89*0Sstevel@tonic-gate }
90*0Sstevel@tonic-gate mintime = min(mintime, CHECK_INTERVAL - iftime);
91*0Sstevel@tonic-gate
92*0Sstevel@tonic-gate mtime += alarmtime;
93*0Sstevel@tonic-gate if (mtime >= supplyinterval) {
94*0Sstevel@tonic-gate if (supplier)
95*0Sstevel@tonic-gate timetomulticast = _B_TRUE;
96*0Sstevel@tonic-gate mtime = 0;
97*0Sstevel@tonic-gate supplyinterval = GET_RANDOM(MIN_SUPPLY_TIME, MAX_SUPPLY_TIME);
98*0Sstevel@tonic-gate }
99*0Sstevel@tonic-gate mintime = min(mintime, supplyinterval - mtime);
100*0Sstevel@tonic-gate
101*0Sstevel@tonic-gate for (i = IPV6_ABITS; i >= 0; i--) {
102*0Sstevel@tonic-gate if (net_hashes[i] == NULL)
103*0Sstevel@tonic-gate continue;
104*0Sstevel@tonic-gate
105*0Sstevel@tonic-gate for (rh = net_hashes[i];
106*0Sstevel@tonic-gate rh < &net_hashes[i][ROUTEHASHSIZ]; rh++) {
107*0Sstevel@tonic-gate for (rt = rh->rt_forw; rt != (struct rt_entry *)rh;
108*0Sstevel@tonic-gate rt = rt->rt_forw) {
109*0Sstevel@tonic-gate /*
110*0Sstevel@tonic-gate * We don't advance time on a routing entry for
111*0Sstevel@tonic-gate * an interface because we catch
112*0Sstevel@tonic-gate * interfaces going up and down in initifs.
113*0Sstevel@tonic-gate */
114*0Sstevel@tonic-gate rt->rt_state &= ~RTS_CHANGED;
115*0Sstevel@tonic-gate if ((rt->rt_state & RTS_INTERFACE) != 0)
116*0Sstevel@tonic-gate continue;
117*0Sstevel@tonic-gate rt->rt_timer += alarmtime;
118*0Sstevel@tonic-gate if (rt->rt_timer >= GARBAGE_TIME) {
119*0Sstevel@tonic-gate rt = rt->rt_back;
120*0Sstevel@tonic-gate rtdelete(rt->rt_forw);
121*0Sstevel@tonic-gate continue;
122*0Sstevel@tonic-gate }
123*0Sstevel@tonic-gate if (rt->rt_timer >= EXPIRE_TIME) {
124*0Sstevel@tonic-gate rtdown(rt);
125*0Sstevel@tonic-gate mintime = min(mintime,
126*0Sstevel@tonic-gate GARBAGE_TIME - rt->rt_timer);
127*0Sstevel@tonic-gate } else {
128*0Sstevel@tonic-gate mintime = min(mintime,
129*0Sstevel@tonic-gate EXPIRE_TIME - rt->rt_timer);
130*0Sstevel@tonic-gate }
131*0Sstevel@tonic-gate }
132*0Sstevel@tonic-gate }
133*0Sstevel@tonic-gate }
134*0Sstevel@tonic-gate
135*0Sstevel@tonic-gate if (timetomulticast) {
136*0Sstevel@tonic-gate supplyall(&allrouters, 0, (struct interface *)NULL, _B_TRUE);
137*0Sstevel@tonic-gate (void) gettimeofday(&now, (struct timezone *)NULL);
138*0Sstevel@tonic-gate lastmcast = now;
139*0Sstevel@tonic-gate lastfullupdate = now;
140*0Sstevel@tonic-gate needupdate = _B_FALSE; /* cancel any pending dynamic update */
141*0Sstevel@tonic-gate nextmcast.tv_sec = 0;
142*0Sstevel@tonic-gate }
143*0Sstevel@tonic-gate (void) sigrelse(SIGUSR2);
144*0Sstevel@tonic-gate (void) sigrelse(SIGUSR1);
145*0Sstevel@tonic-gate (void) sigrelse(SIGHUP);
146*0Sstevel@tonic-gate
147*0Sstevel@tonic-gate /*
148*0Sstevel@tonic-gate * "Remember" (via a static) how long until the next timer expires.
149*0Sstevel@tonic-gate */
150*0Sstevel@tonic-gate alarmtime = mintime;
151*0Sstevel@tonic-gate (void) alarm(alarmtime);
152*0Sstevel@tonic-gate }
153*0Sstevel@tonic-gate
154*0Sstevel@tonic-gate /*
155*0Sstevel@tonic-gate * On SIGTERM, let everyone know we're going away.
156*0Sstevel@tonic-gate */
157*0Sstevel@tonic-gate void
term(void)158*0Sstevel@tonic-gate term(void)
159*0Sstevel@tonic-gate {
160*0Sstevel@tonic-gate struct rthash *rh;
161*0Sstevel@tonic-gate struct rt_entry *rt;
162*0Sstevel@tonic-gate int i;
163*0Sstevel@tonic-gate
164*0Sstevel@tonic-gate if (!supplier)
165*0Sstevel@tonic-gate exit(EXIT_SUCCESS);
166*0Sstevel@tonic-gate for (i = IPV6_ABITS; i >= 0; i--) {
167*0Sstevel@tonic-gate if (net_hashes[i] == NULL)
168*0Sstevel@tonic-gate continue;
169*0Sstevel@tonic-gate
170*0Sstevel@tonic-gate for (rh = net_hashes[i]; rh < &net_hashes[i][ROUTEHASHSIZ];
171*0Sstevel@tonic-gate rh++) {
172*0Sstevel@tonic-gate for (rt = rh->rt_forw; rt != (struct rt_entry *)rh;
173*0Sstevel@tonic-gate rt = rt->rt_forw) {
174*0Sstevel@tonic-gate rt->rt_metric = HOPCNT_INFINITY;
175*0Sstevel@tonic-gate }
176*0Sstevel@tonic-gate }
177*0Sstevel@tonic-gate }
178*0Sstevel@tonic-gate supplyall(&allrouters, 0, (struct interface *)NULL, _B_TRUE);
179*0Sstevel@tonic-gate (void) unlink(PATH_PID);
180*0Sstevel@tonic-gate exit(EXIT_SUCCESS);
181*0Sstevel@tonic-gate }
182