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 1999 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 #ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.1 */
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 /*
43*0Sstevel@tonic-gate * Apply the function "supply" to all active
44*0Sstevel@tonic-gate * interfaces with a link-local address.
45*0Sstevel@tonic-gate */
46*0Sstevel@tonic-gate void
supplyall(struct sockaddr_in6 * sin6,int rtstate,struct interface * skipif,boolean_t splith)47*0Sstevel@tonic-gate supplyall(struct sockaddr_in6 *sin6, int rtstate, struct interface *skipif,
48*0Sstevel@tonic-gate boolean_t splith)
49*0Sstevel@tonic-gate {
50*0Sstevel@tonic-gate struct interface *ifp;
51*0Sstevel@tonic-gate
52*0Sstevel@tonic-gate for (ifp = ifnet; ifp != NULL; ifp = ifp->int_next) {
53*0Sstevel@tonic-gate if ((ifp->int_flags & RIP6_IFF_UP) == 0)
54*0Sstevel@tonic-gate continue;
55*0Sstevel@tonic-gate if (ifp->int_flags & RIP6_IFF_NORTEXCH) {
56*0Sstevel@tonic-gate if (tracing & OUTPUT_BIT) {
57*0Sstevel@tonic-gate (void) fprintf(ftrace,
58*0Sstevel@tonic-gate "Suppress sending RIPng response packet "
59*0Sstevel@tonic-gate "on %s (no route exchange on interface)\n",
60*0Sstevel@tonic-gate ifp->int_name);
61*0Sstevel@tonic-gate (void) fflush(ftrace);
62*0Sstevel@tonic-gate }
63*0Sstevel@tonic-gate continue;
64*0Sstevel@tonic-gate }
65*0Sstevel@tonic-gate if (ifp->int_sock == -1)
66*0Sstevel@tonic-gate continue;
67*0Sstevel@tonic-gate if (ifp == skipif)
68*0Sstevel@tonic-gate continue;
69*0Sstevel@tonic-gate if (!IN6_IS_ADDR_LINKLOCAL(&ifp->int_addr))
70*0Sstevel@tonic-gate continue;
71*0Sstevel@tonic-gate supply(sin6, ifp, rtstate, splith);
72*0Sstevel@tonic-gate }
73*0Sstevel@tonic-gate }
74*0Sstevel@tonic-gate
75*0Sstevel@tonic-gate static void
solicit(struct sockaddr_in6 * sin6,struct interface * ifp)76*0Sstevel@tonic-gate solicit(struct sockaddr_in6 *sin6, struct interface *ifp)
77*0Sstevel@tonic-gate {
78*0Sstevel@tonic-gate msg->rip6_cmd = RIPCMD6_REQUEST;
79*0Sstevel@tonic-gate msg->rip6_vers = RIPVERSION6;
80*0Sstevel@tonic-gate msg->rip6_nets[0].rip6_prefix = in6addr_any;
81*0Sstevel@tonic-gate msg->rip6_nets[0].rip6_prefix_length = 0;
82*0Sstevel@tonic-gate msg->rip6_nets[0].rip6_metric = HOPCNT_INFINITY;
83*0Sstevel@tonic-gate sendpacket(sin6, ifp, sizeof (struct rip6), 0);
84*0Sstevel@tonic-gate }
85*0Sstevel@tonic-gate
86*0Sstevel@tonic-gate void
solicitall(struct sockaddr_in6 * sin6)87*0Sstevel@tonic-gate solicitall(struct sockaddr_in6 *sin6)
88*0Sstevel@tonic-gate {
89*0Sstevel@tonic-gate struct interface *ifp;
90*0Sstevel@tonic-gate
91*0Sstevel@tonic-gate for (ifp = ifnet; ifp != NULL; ifp = ifp->int_next) {
92*0Sstevel@tonic-gate if ((ifp->int_flags & RIP6_IFF_UP) == 0)
93*0Sstevel@tonic-gate continue;
94*0Sstevel@tonic-gate if (ifp->int_flags & RIP6_IFF_NORTEXCH) {
95*0Sstevel@tonic-gate if (tracing & OUTPUT_BIT) {
96*0Sstevel@tonic-gate (void) fprintf(ftrace,
97*0Sstevel@tonic-gate "Suppress sending RIPng request packet "
98*0Sstevel@tonic-gate "on %s (no route exchange on interface)\n",
99*0Sstevel@tonic-gate ifp->int_name);
100*0Sstevel@tonic-gate (void) fflush(ftrace);
101*0Sstevel@tonic-gate }
102*0Sstevel@tonic-gate continue;
103*0Sstevel@tonic-gate }
104*0Sstevel@tonic-gate if (ifp->int_sock == -1)
105*0Sstevel@tonic-gate continue;
106*0Sstevel@tonic-gate solicit(sin6, ifp);
107*0Sstevel@tonic-gate }
108*0Sstevel@tonic-gate }
109*0Sstevel@tonic-gate
110*0Sstevel@tonic-gate
111*0Sstevel@tonic-gate /*
112*0Sstevel@tonic-gate * Output a preformed packet.
113*0Sstevel@tonic-gate */
114*0Sstevel@tonic-gate /*ARGSUSED*/
115*0Sstevel@tonic-gate void
sendpacket(struct sockaddr_in6 * sin6,struct interface * ifp,int size,int flags)116*0Sstevel@tonic-gate sendpacket(struct sockaddr_in6 *sin6, struct interface *ifp, int size,
117*0Sstevel@tonic-gate int flags)
118*0Sstevel@tonic-gate {
119*0Sstevel@tonic-gate if (sendto(ifp->int_sock, packet, size, flags,
120*0Sstevel@tonic-gate (struct sockaddr *)sin6, sizeof (*sin6)) < 0) {
121*0Sstevel@tonic-gate syslog(LOG_ERR, "sendpacket: sendto: %m");
122*0Sstevel@tonic-gate return;
123*0Sstevel@tonic-gate }
124*0Sstevel@tonic-gate TRACE_OUTPUT(ifp, sin6, sizeof (struct rip6));
125*0Sstevel@tonic-gate ifp->int_opackets++;
126*0Sstevel@tonic-gate }
127*0Sstevel@tonic-gate
128*0Sstevel@tonic-gate /*
129*0Sstevel@tonic-gate * Supply dst with the contents of the routing tables.
130*0Sstevel@tonic-gate * If this won't fit in one packet, chop it up into several.
131*0Sstevel@tonic-gate */
132*0Sstevel@tonic-gate void
supply(struct sockaddr_in6 * sin6,struct interface * ifp,int rtstate,boolean_t splith)133*0Sstevel@tonic-gate supply(struct sockaddr_in6 *sin6, struct interface *ifp, int rtstate,
134*0Sstevel@tonic-gate boolean_t splith)
135*0Sstevel@tonic-gate {
136*0Sstevel@tonic-gate struct rt_entry *rt;
137*0Sstevel@tonic-gate struct netinfo6 *n = msg->rip6_nets;
138*0Sstevel@tonic-gate struct rthash *rh;
139*0Sstevel@tonic-gate int size, i, maxsize;
140*0Sstevel@tonic-gate uint8_t rtmetric;
141*0Sstevel@tonic-gate
142*0Sstevel@tonic-gate msg->rip6_cmd = RIPCMD6_RESPONSE;
143*0Sstevel@tonic-gate msg->rip6_vers = RIPVERSION6;
144*0Sstevel@tonic-gate
145*0Sstevel@tonic-gate /*
146*0Sstevel@tonic-gate * Initialize maxsize to the size of the largest RIPng packet supported
147*0Sstevel@tonic-gate * on the outgoing interface.
148*0Sstevel@tonic-gate */
149*0Sstevel@tonic-gate maxsize = ifp->int_mtu - sizeof (ip6_t) - sizeof (struct udphdr);
150*0Sstevel@tonic-gate
151*0Sstevel@tonic-gate for (i = IPV6_ABITS; i >= 0; i--) {
152*0Sstevel@tonic-gate if (net_hashes[i] == NULL)
153*0Sstevel@tonic-gate continue;
154*0Sstevel@tonic-gate
155*0Sstevel@tonic-gate for (rh = net_hashes[i]; rh < &net_hashes[i][ROUTEHASHSIZ];
156*0Sstevel@tonic-gate rh++) {
157*0Sstevel@tonic-gate for (rt = rh->rt_forw; rt != (struct rt_entry *)rh;
158*0Sstevel@tonic-gate rt = rt->rt_forw) {
159*0Sstevel@tonic-gate
160*0Sstevel@tonic-gate if (IN6_IS_ADDR_LINKLOCAL(&rt->rt_dst))
161*0Sstevel@tonic-gate continue;
162*0Sstevel@tonic-gate if (IN6_IS_ADDR_UNSPECIFIED(&rt->rt_dst))
163*0Sstevel@tonic-gate continue;
164*0Sstevel@tonic-gate
165*0Sstevel@tonic-gate /* do not send if private */
166*0Sstevel@tonic-gate if (rt->rt_state & RTS_PRIVATE)
167*0Sstevel@tonic-gate continue;
168*0Sstevel@tonic-gate
169*0Sstevel@tonic-gate /*
170*0Sstevel@tonic-gate * Don't resend the information
171*0Sstevel@tonic-gate * on the network from which it was received.
172*0Sstevel@tonic-gate */
173*0Sstevel@tonic-gate if (splith && rt->rt_ifp != NULL &&
174*0Sstevel@tonic-gate strcmp(ifp->int_ifbase,
175*0Sstevel@tonic-gate rt->rt_ifp->int_ifbase) == 0) {
176*0Sstevel@tonic-gate if (dopoison)
177*0Sstevel@tonic-gate rtmetric = HOPCNT_INFINITY;
178*0Sstevel@tonic-gate else
179*0Sstevel@tonic-gate continue;
180*0Sstevel@tonic-gate } else {
181*0Sstevel@tonic-gate rtmetric = rt->rt_metric;
182*0Sstevel@tonic-gate }
183*0Sstevel@tonic-gate
184*0Sstevel@tonic-gate /*
185*0Sstevel@tonic-gate * For dynamic updates, limit update to routes
186*0Sstevel@tonic-gate * with the specified state.
187*0Sstevel@tonic-gate */
188*0Sstevel@tonic-gate if (rtstate != 0 &&
189*0Sstevel@tonic-gate (rt->rt_state & rtstate) == 0)
190*0Sstevel@tonic-gate continue;
191*0Sstevel@tonic-gate
192*0Sstevel@tonic-gate /*
193*0Sstevel@tonic-gate * Check if there is space for another RTE. If
194*0Sstevel@tonic-gate * not, send the packet built up and reset n for
195*0Sstevel@tonic-gate * the remaining RTEs.
196*0Sstevel@tonic-gate */
197*0Sstevel@tonic-gate size = (char *)n - packet;
198*0Sstevel@tonic-gate if (size > maxsize - sizeof (struct netinfo6)) {
199*0Sstevel@tonic-gate sendpacket(sin6, ifp, size, 0);
200*0Sstevel@tonic-gate TRACE_OUTPUT(ifp, sin6, size);
201*0Sstevel@tonic-gate n = msg->rip6_nets;
202*0Sstevel@tonic-gate }
203*0Sstevel@tonic-gate n->rip6_prefix = rt->rt_dst;
204*0Sstevel@tonic-gate n->rip6_route_tag = rt->rt_tag;
205*0Sstevel@tonic-gate n->rip6_prefix_length = rt->rt_prefix_length;
206*0Sstevel@tonic-gate n->rip6_metric = min(rtmetric, HOPCNT_INFINITY);
207*0Sstevel@tonic-gate n++;
208*0Sstevel@tonic-gate } /* end of hash chain */
209*0Sstevel@tonic-gate } /* end of particular prefix length */
210*0Sstevel@tonic-gate } /* end of all prefix lengths */
211*0Sstevel@tonic-gate if (n != msg->rip6_nets) {
212*0Sstevel@tonic-gate size = (char *)n - packet;
213*0Sstevel@tonic-gate sendpacket(sin6, ifp, size, 0);
214*0Sstevel@tonic-gate TRACE_OUTPUT(ifp, sin6, size);
215*0Sstevel@tonic-gate }
216*0Sstevel@tonic-gate }
217