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 #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 static char buf1[INET6_ADDRSTRLEN]; 43*0Sstevel@tonic-gate static char buf2[INET6_ADDRSTRLEN]; 44*0Sstevel@tonic-gate 45*0Sstevel@tonic-gate static void rip_input(struct sockaddr_in6 *from, int size, uint_t hopcount, 46*0Sstevel@tonic-gate struct interface *ifp); 47*0Sstevel@tonic-gate 48*0Sstevel@tonic-gate /* 49*0Sstevel@tonic-gate * Return a pointer to the specified option buffer. 50*0Sstevel@tonic-gate * If not found return NULL. 51*0Sstevel@tonic-gate */ 52*0Sstevel@tonic-gate static void * 53*0Sstevel@tonic-gate find_ancillary(struct msghdr *rmsg, int cmsg_type) 54*0Sstevel@tonic-gate { 55*0Sstevel@tonic-gate struct cmsghdr *cmsg; 56*0Sstevel@tonic-gate 57*0Sstevel@tonic-gate for (cmsg = CMSG_FIRSTHDR(rmsg); cmsg != NULL; 58*0Sstevel@tonic-gate cmsg = CMSG_NXTHDR(rmsg, cmsg)) { 59*0Sstevel@tonic-gate if (cmsg->cmsg_level == IPPROTO_IPV6 && 60*0Sstevel@tonic-gate cmsg->cmsg_type == cmsg_type) { 61*0Sstevel@tonic-gate return (CMSG_DATA(cmsg)); 62*0Sstevel@tonic-gate } 63*0Sstevel@tonic-gate } 64*0Sstevel@tonic-gate return (NULL); 65*0Sstevel@tonic-gate } 66*0Sstevel@tonic-gate 67*0Sstevel@tonic-gate /* 68*0Sstevel@tonic-gate * Read a packet and passes it to rip_input() for processing. 69*0Sstevel@tonic-gate */ 70*0Sstevel@tonic-gate void 71*0Sstevel@tonic-gate in_data(struct interface *ifp) 72*0Sstevel@tonic-gate { 73*0Sstevel@tonic-gate struct sockaddr_in6 from; 74*0Sstevel@tonic-gate int len; 75*0Sstevel@tonic-gate struct msghdr rmsg; 76*0Sstevel@tonic-gate struct iovec iov; 77*0Sstevel@tonic-gate uchar_t *hopcntopt; 78*0Sstevel@tonic-gate 79*0Sstevel@tonic-gate iov.iov_base = packet; 80*0Sstevel@tonic-gate iov.iov_len = IPV6_MAX_PACKET; 81*0Sstevel@tonic-gate rmsg.msg_name = &from; 82*0Sstevel@tonic-gate rmsg.msg_namelen = (socklen_t)sizeof (from); 83*0Sstevel@tonic-gate rmsg.msg_iov = &iov; 84*0Sstevel@tonic-gate rmsg.msg_iovlen = 1; 85*0Sstevel@tonic-gate rmsg.msg_control = control; 86*0Sstevel@tonic-gate rmsg.msg_controllen = IPV6_MAX_PACKET; 87*0Sstevel@tonic-gate 88*0Sstevel@tonic-gate if ((len = recvmsg(ifp->int_sock, &rmsg, 0)) < 0) { 89*0Sstevel@tonic-gate /* 90*0Sstevel@tonic-gate * Only syslog if a true error occurred. 91*0Sstevel@tonic-gate */ 92*0Sstevel@tonic-gate if (errno != EINTR) 93*0Sstevel@tonic-gate syslog(LOG_ERR, "in_data: recvmsg: %m"); 94*0Sstevel@tonic-gate return; 95*0Sstevel@tonic-gate } 96*0Sstevel@tonic-gate if (len == 0) 97*0Sstevel@tonic-gate return; 98*0Sstevel@tonic-gate 99*0Sstevel@tonic-gate if (tracing & INPUT_BIT) { 100*0Sstevel@tonic-gate (void) inet_ntop(from.sin6_family, &from.sin6_addr, buf1, 101*0Sstevel@tonic-gate sizeof (buf1)); 102*0Sstevel@tonic-gate } 103*0Sstevel@tonic-gate 104*0Sstevel@tonic-gate /* Ignore packets > 64k or control buffers that don't fit */ 105*0Sstevel@tonic-gate if (rmsg.msg_flags & (MSG_TRUNC | MSG_CTRUNC)) { 106*0Sstevel@tonic-gate if (tracing & INPUT_BIT) { 107*0Sstevel@tonic-gate (void) fprintf(stderr, 108*0Sstevel@tonic-gate "Truncated message: msg_flags 0x%x from %s\n", 109*0Sstevel@tonic-gate rmsg.msg_flags, buf1); 110*0Sstevel@tonic-gate } 111*0Sstevel@tonic-gate return; 112*0Sstevel@tonic-gate } 113*0Sstevel@tonic-gate 114*0Sstevel@tonic-gate if ((hopcntopt = find_ancillary(&rmsg, IPV6_HOPLIMIT)) == NULL) { 115*0Sstevel@tonic-gate if (tracing & INPUT_BIT) { 116*0Sstevel@tonic-gate (void) fprintf(stderr, "Unknown hop limit from %s\n", 117*0Sstevel@tonic-gate buf1); 118*0Sstevel@tonic-gate } 119*0Sstevel@tonic-gate return; 120*0Sstevel@tonic-gate } 121*0Sstevel@tonic-gate rip_input(&from, len, *(uint_t *)hopcntopt, ifp); 122*0Sstevel@tonic-gate } 123*0Sstevel@tonic-gate 124*0Sstevel@tonic-gate /* 125*0Sstevel@tonic-gate * Process a newly received packet. 126*0Sstevel@tonic-gate */ 127*0Sstevel@tonic-gate static void 128*0Sstevel@tonic-gate rip_input(struct sockaddr_in6 *from, int size, uint_t hopcount, 129*0Sstevel@tonic-gate struct interface *ifp) 130*0Sstevel@tonic-gate { 131*0Sstevel@tonic-gate struct rt_entry *rt; 132*0Sstevel@tonic-gate struct netinfo6 *n; 133*0Sstevel@tonic-gate int newsize; 134*0Sstevel@tonic-gate boolean_t changes = _B_FALSE; 135*0Sstevel@tonic-gate int answer = supplier; 136*0Sstevel@tonic-gate struct in6_addr prefix; 137*0Sstevel@tonic-gate struct in6_addr nexthop; 138*0Sstevel@tonic-gate struct in6_addr *gate; 139*0Sstevel@tonic-gate boolean_t foundnexthop = _B_FALSE; 140*0Sstevel@tonic-gate struct sioc_addrreq sa; 141*0Sstevel@tonic-gate struct sockaddr_in6 *sin6; 142*0Sstevel@tonic-gate 143*0Sstevel@tonic-gate TRACE_INPUT(ifp, from, size); 144*0Sstevel@tonic-gate if (tracing & INPUT_BIT) { 145*0Sstevel@tonic-gate (void) inet_ntop(from->sin6_family, (void *)&from->sin6_addr, 146*0Sstevel@tonic-gate buf1, sizeof (buf1)); 147*0Sstevel@tonic-gate } 148*0Sstevel@tonic-gate 149*0Sstevel@tonic-gate /* 150*0Sstevel@tonic-gate * If the packet is recevied on an interface with IFF_NORTEXCH flag set, 151*0Sstevel@tonic-gate * we ignore the packet. 152*0Sstevel@tonic-gate */ 153*0Sstevel@tonic-gate if (ifp->int_flags & RIP6_IFF_NORTEXCH) { 154*0Sstevel@tonic-gate if (tracing & INPUT_BIT) { 155*0Sstevel@tonic-gate (void) fprintf(ftrace, 156*0Sstevel@tonic-gate "Ignore received RIPng packet on %s " 157*0Sstevel@tonic-gate "(no route exchange on interface)\n", 158*0Sstevel@tonic-gate ifp->int_name); 159*0Sstevel@tonic-gate (void) fflush(ftrace); 160*0Sstevel@tonic-gate } 161*0Sstevel@tonic-gate return; 162*0Sstevel@tonic-gate } 163*0Sstevel@tonic-gate if (msg->rip6_vers != RIPVERSION6) { 164*0Sstevel@tonic-gate if (tracing & INPUT_BIT) { 165*0Sstevel@tonic-gate (void) fprintf(ftrace, 166*0Sstevel@tonic-gate "Bad version number %d in packet from %s\n", 167*0Sstevel@tonic-gate msg->rip6_vers, buf1); 168*0Sstevel@tonic-gate (void) fflush(ftrace); 169*0Sstevel@tonic-gate } 170*0Sstevel@tonic-gate return; 171*0Sstevel@tonic-gate } 172*0Sstevel@tonic-gate if (ntohs(msg->rip6_res1) != 0) { 173*0Sstevel@tonic-gate if (tracing & INPUT_BIT) { 174*0Sstevel@tonic-gate (void) fprintf(ftrace, 175*0Sstevel@tonic-gate "Non-zero reserved octets found in packet from " 176*0Sstevel@tonic-gate "%s\n", 177*0Sstevel@tonic-gate buf1); 178*0Sstevel@tonic-gate (void) fflush(ftrace); 179*0Sstevel@tonic-gate } 180*0Sstevel@tonic-gate } 181*0Sstevel@tonic-gate 182*0Sstevel@tonic-gate switch (msg->rip6_cmd) { 183*0Sstevel@tonic-gate 184*0Sstevel@tonic-gate case RIPCMD6_REQUEST: /* multicasted request */ 185*0Sstevel@tonic-gate ifp->int_ipackets++; 186*0Sstevel@tonic-gate newsize = 0; 187*0Sstevel@tonic-gate 188*0Sstevel@tonic-gate /* 189*0Sstevel@tonic-gate * Adjust size by the length of the command, version and 190*0Sstevel@tonic-gate * reserved fields (which are in total 32-bit aligned). 191*0Sstevel@tonic-gate */ 192*0Sstevel@tonic-gate size -= sizeof (msg->rip6_cmd) + sizeof (msg->rip6_vers) + 193*0Sstevel@tonic-gate sizeof (msg->rip6_res1); 194*0Sstevel@tonic-gate 195*0Sstevel@tonic-gate /* 196*0Sstevel@tonic-gate * From section 2.4.1 of RFC 2080: 197*0Sstevel@tonic-gate * 198*0Sstevel@tonic-gate * If there is exactly one entry in the request with a 199*0Sstevel@tonic-gate * destination prefix of zero, a prefix length of zero and 200*0Sstevel@tonic-gate * an infinite metric, then supply the entire routing 201*0Sstevel@tonic-gate * table. 202*0Sstevel@tonic-gate */ 203*0Sstevel@tonic-gate n = msg->rip6_nets; 204*0Sstevel@tonic-gate if (size == sizeof (struct netinfo6) && 205*0Sstevel@tonic-gate n->rip6_prefix_length == 0 && 206*0Sstevel@tonic-gate n->rip6_metric == HOPCNT_INFINITY) { 207*0Sstevel@tonic-gate rtcreate_prefix(&n->rip6_prefix, &prefix, 208*0Sstevel@tonic-gate n->rip6_prefix_length); 209*0Sstevel@tonic-gate if (IN6_IS_ADDR_UNSPECIFIED(&prefix)) { 210*0Sstevel@tonic-gate supply(from, ifp, 0, 211*0Sstevel@tonic-gate from->sin6_port == rip6_port); 212*0Sstevel@tonic-gate return; 213*0Sstevel@tonic-gate } 214*0Sstevel@tonic-gate } 215*0Sstevel@tonic-gate for (; size >= sizeof (struct netinfo6); 216*0Sstevel@tonic-gate size -= sizeof (struct netinfo6), n++) { 217*0Sstevel@tonic-gate if (n->rip6_prefix_length > IPV6_ABITS) { 218*0Sstevel@tonic-gate if (tracing & INPUT_BIT) { 219*0Sstevel@tonic-gate (void) fprintf(ftrace, 220*0Sstevel@tonic-gate "Bad prefix length %d in request " 221*0Sstevel@tonic-gate "from %s\n", 222*0Sstevel@tonic-gate n->rip6_prefix_length, buf1); 223*0Sstevel@tonic-gate (void) fflush(ftrace); 224*0Sstevel@tonic-gate } 225*0Sstevel@tonic-gate continue; 226*0Sstevel@tonic-gate } 227*0Sstevel@tonic-gate if (IN6_IS_ADDR_LINKLOCAL(&n->rip6_prefix) || 228*0Sstevel@tonic-gate IN6_IS_ADDR_MULTICAST(&n->rip6_prefix)) { 229*0Sstevel@tonic-gate if (tracing & INPUT_BIT) { 230*0Sstevel@tonic-gate (void) fprintf(ftrace, 231*0Sstevel@tonic-gate "Bad prefix %s in request from " 232*0Sstevel@tonic-gate "%s\n", 233*0Sstevel@tonic-gate inet_ntop(AF_INET6, 234*0Sstevel@tonic-gate (void *)&n->rip6_prefix, buf2, 235*0Sstevel@tonic-gate sizeof (buf2)), 236*0Sstevel@tonic-gate buf1); 237*0Sstevel@tonic-gate (void) fflush(ftrace); 238*0Sstevel@tonic-gate } 239*0Sstevel@tonic-gate continue; 240*0Sstevel@tonic-gate } 241*0Sstevel@tonic-gate rtcreate_prefix(&n->rip6_prefix, &prefix, 242*0Sstevel@tonic-gate n->rip6_prefix_length); 243*0Sstevel@tonic-gate rt = rtlookup(&prefix, n->rip6_prefix_length); 244*0Sstevel@tonic-gate 245*0Sstevel@tonic-gate n->rip6_metric = (rt == NULL ? 246*0Sstevel@tonic-gate HOPCNT_INFINITY : 247*0Sstevel@tonic-gate min(rt->rt_metric, HOPCNT_INFINITY)); 248*0Sstevel@tonic-gate newsize += sizeof (struct netinfo6); 249*0Sstevel@tonic-gate } 250*0Sstevel@tonic-gate if (size > 0) { 251*0Sstevel@tonic-gate if (tracing & INPUT_BIT) { 252*0Sstevel@tonic-gate (void) fprintf(ftrace, 253*0Sstevel@tonic-gate "Ignoring %d octets of trailing data in " 254*0Sstevel@tonic-gate "request from %s\n", 255*0Sstevel@tonic-gate size, buf1); 256*0Sstevel@tonic-gate (void) fflush(ftrace); 257*0Sstevel@tonic-gate } 258*0Sstevel@tonic-gate } 259*0Sstevel@tonic-gate if (answer && newsize > 0) { 260*0Sstevel@tonic-gate /* 261*0Sstevel@tonic-gate * Adjust newsize by the length of the command, version 262*0Sstevel@tonic-gate * and reserved fields (which are in total 32-bit 263*0Sstevel@tonic-gate * aligned). 264*0Sstevel@tonic-gate */ 265*0Sstevel@tonic-gate msg->rip6_cmd = RIPCMD6_RESPONSE; 266*0Sstevel@tonic-gate newsize += sizeof (msg->rip6_cmd) + 267*0Sstevel@tonic-gate sizeof (msg->rip6_vers) + sizeof (msg->rip6_res1); 268*0Sstevel@tonic-gate sendpacket(from, ifp, newsize, 0); 269*0Sstevel@tonic-gate } 270*0Sstevel@tonic-gate return; 271*0Sstevel@tonic-gate 272*0Sstevel@tonic-gate case RIPCMD6_RESPONSE: 273*0Sstevel@tonic-gate if (hopcount != IPV6_MAX_HOPS) { 274*0Sstevel@tonic-gate if (tracing & INPUT_BIT) { 275*0Sstevel@tonic-gate (void) fprintf(ftrace, 276*0Sstevel@tonic-gate "Bad hop count %d in response from %s\n", 277*0Sstevel@tonic-gate hopcount, buf1); 278*0Sstevel@tonic-gate (void) fflush(ftrace); 279*0Sstevel@tonic-gate } 280*0Sstevel@tonic-gate return; 281*0Sstevel@tonic-gate } 282*0Sstevel@tonic-gate 283*0Sstevel@tonic-gate if (from->sin6_port != rip6_port) { 284*0Sstevel@tonic-gate if (tracing & INPUT_BIT) { 285*0Sstevel@tonic-gate (void) fprintf(ftrace, 286*0Sstevel@tonic-gate "Bad source port %d in response from %s\n", 287*0Sstevel@tonic-gate from->sin6_port, buf1); 288*0Sstevel@tonic-gate (void) fflush(ftrace); 289*0Sstevel@tonic-gate } 290*0Sstevel@tonic-gate return; 291*0Sstevel@tonic-gate } 292*0Sstevel@tonic-gate 293*0Sstevel@tonic-gate if (!IN6_IS_ADDR_LINKLOCAL(&from->sin6_addr)) { 294*0Sstevel@tonic-gate if (tracing & INPUT_BIT) { 295*0Sstevel@tonic-gate (void) fprintf(ftrace, 296*0Sstevel@tonic-gate "Bad source address (not link-local) in " 297*0Sstevel@tonic-gate "response from %s\n", buf1); 298*0Sstevel@tonic-gate (void) fflush(ftrace); 299*0Sstevel@tonic-gate } 300*0Sstevel@tonic-gate return; 301*0Sstevel@tonic-gate } 302*0Sstevel@tonic-gate ifp->int_ipackets++; 303*0Sstevel@tonic-gate 304*0Sstevel@tonic-gate /* 305*0Sstevel@tonic-gate * Adjust size by the length of the command, version and 306*0Sstevel@tonic-gate * reserved fields (which are in total 32-bit aligned). 307*0Sstevel@tonic-gate */ 308*0Sstevel@tonic-gate size -= sizeof (msg->rip6_cmd) + sizeof (msg->rip6_vers) + 309*0Sstevel@tonic-gate sizeof (msg->rip6_res1); 310*0Sstevel@tonic-gate for (n = msg->rip6_nets; 311*0Sstevel@tonic-gate supplier && size >= sizeof (struct netinfo6); 312*0Sstevel@tonic-gate size -= sizeof (struct netinfo6), n++) { 313*0Sstevel@tonic-gate /* 314*0Sstevel@tonic-gate * From section 2.1.1 of RFC 2080: 315*0Sstevel@tonic-gate * 316*0Sstevel@tonic-gate * This is a next hop RTE if n->rip6_metric is set to 317*0Sstevel@tonic-gate * HOPCNT_NEXTHOP. If the next hop address (which is 318*0Sstevel@tonic-gate * placed in the prefix field of this special RTE) is 319*0Sstevel@tonic-gate * unspecified or is not a link-local address, then use 320*0Sstevel@tonic-gate * the originator's address instead (effectively turning 321*0Sstevel@tonic-gate * off next hop RTE processing.) 322*0Sstevel@tonic-gate */ 323*0Sstevel@tonic-gate if (n->rip6_metric == HOPCNT_NEXTHOP) { 324*0Sstevel@tonic-gate /* 325*0Sstevel@tonic-gate * First check to see if the unspecified address 326*0Sstevel@tonic-gate * was given as the next hop address. This is 327*0Sstevel@tonic-gate * the correct way of specifying the end of use 328*0Sstevel@tonic-gate * of a next hop address. 329*0Sstevel@tonic-gate */ 330*0Sstevel@tonic-gate if (IN6_IS_ADDR_UNSPECIFIED(&n->rip6_prefix)) { 331*0Sstevel@tonic-gate foundnexthop = _B_FALSE; 332*0Sstevel@tonic-gate continue; 333*0Sstevel@tonic-gate } 334*0Sstevel@tonic-gate /* 335*0Sstevel@tonic-gate * A next hop address that is not a link-local 336*0Sstevel@tonic-gate * address is treated as the unspecified one. 337*0Sstevel@tonic-gate * Trace this event if input tracing is enabled. 338*0Sstevel@tonic-gate */ 339*0Sstevel@tonic-gate if (!IN6_IS_ADDR_LINKLOCAL(&n->rip6_prefix)) { 340*0Sstevel@tonic-gate foundnexthop = _B_FALSE; 341*0Sstevel@tonic-gate if (tracing & INPUT_BIT) { 342*0Sstevel@tonic-gate (void) fprintf(ftrace, 343*0Sstevel@tonic-gate "Bad next hop %s in " 344*0Sstevel@tonic-gate "response from %s\n", 345*0Sstevel@tonic-gate inet_ntop(AF_INET6, 346*0Sstevel@tonic-gate (void *)&n->rip6_prefix, 347*0Sstevel@tonic-gate buf2, sizeof (buf2)), 348*0Sstevel@tonic-gate buf1); 349*0Sstevel@tonic-gate } 350*0Sstevel@tonic-gate continue; 351*0Sstevel@tonic-gate } 352*0Sstevel@tonic-gate /* 353*0Sstevel@tonic-gate * Verify that the next hop address is not one 354*0Sstevel@tonic-gate * of our own. 355*0Sstevel@tonic-gate */ 356*0Sstevel@tonic-gate sin6 = (struct sockaddr_in6 *)&sa.sa_addr; 357*0Sstevel@tonic-gate sin6->sin6_family = AF_INET6; 358*0Sstevel@tonic-gate sin6->sin6_addr = n->rip6_prefix; 359*0Sstevel@tonic-gate if (ioctl(iocsoc, SIOCTMYADDR, 360*0Sstevel@tonic-gate (char *)&sa) < 0) { 361*0Sstevel@tonic-gate syslog(LOG_ERR, 362*0Sstevel@tonic-gate "rip_input: " 363*0Sstevel@tonic-gate "ioctl (verify my address): %m"); 364*0Sstevel@tonic-gate return; 365*0Sstevel@tonic-gate } 366*0Sstevel@tonic-gate if (sa.sa_res != 0) { 367*0Sstevel@tonic-gate foundnexthop = _B_FALSE; 368*0Sstevel@tonic-gate if (tracing & INPUT_BIT) { 369*0Sstevel@tonic-gate (void) fprintf(ftrace, 370*0Sstevel@tonic-gate "Bad next hop %s is self " 371*0Sstevel@tonic-gate "in response from %s\n", 372*0Sstevel@tonic-gate inet_ntop(AF_INET6, 373*0Sstevel@tonic-gate (void *)&n->rip6_prefix, 374*0Sstevel@tonic-gate buf2, sizeof (buf2)), 375*0Sstevel@tonic-gate buf1); 376*0Sstevel@tonic-gate } 377*0Sstevel@tonic-gate continue; 378*0Sstevel@tonic-gate } 379*0Sstevel@tonic-gate foundnexthop = _B_TRUE; 380*0Sstevel@tonic-gate nexthop = n->rip6_prefix; 381*0Sstevel@tonic-gate continue; 382*0Sstevel@tonic-gate } 383*0Sstevel@tonic-gate if (foundnexthop) 384*0Sstevel@tonic-gate gate = &nexthop; 385*0Sstevel@tonic-gate else 386*0Sstevel@tonic-gate gate = &from->sin6_addr; 387*0Sstevel@tonic-gate 388*0Sstevel@tonic-gate if (n->rip6_metric > HOPCNT_INFINITY || 389*0Sstevel@tonic-gate n->rip6_metric < 1) { 390*0Sstevel@tonic-gate if (tracing & INPUT_BIT) { 391*0Sstevel@tonic-gate (void) fprintf(ftrace, 392*0Sstevel@tonic-gate "Bad metric %d in response from " 393*0Sstevel@tonic-gate "%s\n", 394*0Sstevel@tonic-gate n->rip6_metric, buf1); 395*0Sstevel@tonic-gate (void) fflush(ftrace); 396*0Sstevel@tonic-gate } 397*0Sstevel@tonic-gate continue; 398*0Sstevel@tonic-gate } 399*0Sstevel@tonic-gate if (n->rip6_prefix_length > IPV6_ABITS) { 400*0Sstevel@tonic-gate if (tracing & INPUT_BIT) { 401*0Sstevel@tonic-gate (void) fprintf(ftrace, 402*0Sstevel@tonic-gate "Bad prefix length %d in response " 403*0Sstevel@tonic-gate "from %s\n", 404*0Sstevel@tonic-gate n->rip6_prefix_length, buf1); 405*0Sstevel@tonic-gate (void) fflush(ftrace); 406*0Sstevel@tonic-gate } 407*0Sstevel@tonic-gate continue; 408*0Sstevel@tonic-gate } 409*0Sstevel@tonic-gate 410*0Sstevel@tonic-gate if (IN6_IS_ADDR_LINKLOCAL(&n->rip6_prefix) || 411*0Sstevel@tonic-gate IN6_IS_ADDR_MULTICAST(&n->rip6_prefix)) { 412*0Sstevel@tonic-gate if (tracing & INPUT_BIT) { 413*0Sstevel@tonic-gate 414*0Sstevel@tonic-gate (void) fprintf(ftrace, 415*0Sstevel@tonic-gate "Bad prefix %s in response from " 416*0Sstevel@tonic-gate "%s\n", 417*0Sstevel@tonic-gate inet_ntop(AF_INET6, 418*0Sstevel@tonic-gate (void *)&n->rip6_prefix, buf2, 419*0Sstevel@tonic-gate sizeof (buf2)), 420*0Sstevel@tonic-gate buf1); 421*0Sstevel@tonic-gate (void) fflush(ftrace); 422*0Sstevel@tonic-gate } 423*0Sstevel@tonic-gate continue; 424*0Sstevel@tonic-gate } 425*0Sstevel@tonic-gate /* Include metric for incoming interface */ 426*0Sstevel@tonic-gate n->rip6_metric += IFMETRIC(ifp); 427*0Sstevel@tonic-gate 428*0Sstevel@tonic-gate rtcreate_prefix(&n->rip6_prefix, &prefix, 429*0Sstevel@tonic-gate n->rip6_prefix_length); 430*0Sstevel@tonic-gate rt = rtlookup(&prefix, n->rip6_prefix_length); 431*0Sstevel@tonic-gate if (rt == NULL) { 432*0Sstevel@tonic-gate if (n->rip6_metric < HOPCNT_INFINITY) { 433*0Sstevel@tonic-gate rtadd(&prefix, 434*0Sstevel@tonic-gate gate, n->rip6_prefix_length, 435*0Sstevel@tonic-gate n->rip6_metric, n->rip6_route_tag, 436*0Sstevel@tonic-gate _B_FALSE, ifp); 437*0Sstevel@tonic-gate changes = _B_TRUE; 438*0Sstevel@tonic-gate } 439*0Sstevel@tonic-gate continue; 440*0Sstevel@tonic-gate } 441*0Sstevel@tonic-gate 442*0Sstevel@tonic-gate /* 443*0Sstevel@tonic-gate * If the supplied metric is at least HOPCNT_INFINITY 444*0Sstevel@tonic-gate * and the current metric of the route is 445*0Sstevel@tonic-gate * HOPCNT_INFINITY, then this particular RTE is ignored. 446*0Sstevel@tonic-gate */ 447*0Sstevel@tonic-gate if (n->rip6_metric >= HOPCNT_INFINITY && 448*0Sstevel@tonic-gate rt->rt_metric == HOPCNT_INFINITY) 449*0Sstevel@tonic-gate continue; 450*0Sstevel@tonic-gate 451*0Sstevel@tonic-gate /* 452*0Sstevel@tonic-gate * From section 2.4.2 of RFC 2080: 453*0Sstevel@tonic-gate * 454*0Sstevel@tonic-gate * Update if any one of the following is true 455*0Sstevel@tonic-gate * 456*0Sstevel@tonic-gate * 1) From current gateway and a different metric. 457*0Sstevel@tonic-gate * 2) From current gateway and a different index. 458*0Sstevel@tonic-gate * 3) A shorter (smaller) metric. 459*0Sstevel@tonic-gate * 4) Equivalent metric and an age at least 460*0Sstevel@tonic-gate * one-half of EXPIRE_TIME. 461*0Sstevel@tonic-gate * 462*0Sstevel@tonic-gate * Otherwise, update timer for the interface on which 463*0Sstevel@tonic-gate * the packet arrived. 464*0Sstevel@tonic-gate */ 465*0Sstevel@tonic-gate if (IN6_ARE_ADDR_EQUAL(gate, &rt->rt_router)) { 466*0Sstevel@tonic-gate if (n->rip6_metric != rt->rt_metric || 467*0Sstevel@tonic-gate rt->rt_ifp != ifp) { 468*0Sstevel@tonic-gate rtchange(rt, gate, n->rip6_metric, ifp); 469*0Sstevel@tonic-gate changes = _B_TRUE; 470*0Sstevel@tonic-gate } else if (n->rip6_metric < HOPCNT_INFINITY) { 471*0Sstevel@tonic-gate rt->rt_timer = 0; 472*0Sstevel@tonic-gate } 473*0Sstevel@tonic-gate } else if (n->rip6_metric < rt->rt_metric || 474*0Sstevel@tonic-gate (rt->rt_timer > (EXPIRE_TIME / 2) && 475*0Sstevel@tonic-gate rt->rt_metric == n->rip6_metric)) { 476*0Sstevel@tonic-gate rtchange(rt, gate, n->rip6_metric, ifp); 477*0Sstevel@tonic-gate changes = _B_TRUE; 478*0Sstevel@tonic-gate } 479*0Sstevel@tonic-gate } 480*0Sstevel@tonic-gate if (changes && supplier) 481*0Sstevel@tonic-gate dynamic_update(ifp); 482*0Sstevel@tonic-gate return; 483*0Sstevel@tonic-gate 484*0Sstevel@tonic-gate default: 485*0Sstevel@tonic-gate if (tracing & INPUT_BIT) { 486*0Sstevel@tonic-gate (void) fprintf(ftrace, 487*0Sstevel@tonic-gate "Bad command %d in packet from %s\n", 488*0Sstevel@tonic-gate msg->rip6_cmd, buf1); 489*0Sstevel@tonic-gate (void) fflush(ftrace); 490*0Sstevel@tonic-gate } 491*0Sstevel@tonic-gate return; 492*0Sstevel@tonic-gate } 493*0Sstevel@tonic-gate } 494*0Sstevel@tonic-gate 495*0Sstevel@tonic-gate /* 496*0Sstevel@tonic-gate * If changes have occurred, and if we have not sent a multicast 497*0Sstevel@tonic-gate * recently, send a dynamic update. This update is sent only 498*0Sstevel@tonic-gate * on interfaces other than the one on which we received notice 499*0Sstevel@tonic-gate * of the change. If we are within MIN_WAIT_TIME of a full update, 500*0Sstevel@tonic-gate * don't bother sending; if we just sent a dynamic update 501*0Sstevel@tonic-gate * and set a timer (nextmcast), delay until that time. 502*0Sstevel@tonic-gate * If we just sent a full update, delay the dynamic update. 503*0Sstevel@tonic-gate * Set a timer for a randomized value to suppress additional 504*0Sstevel@tonic-gate * dynamic updates until it expires; if we delayed sending 505*0Sstevel@tonic-gate * the current changes, set needupdate. 506*0Sstevel@tonic-gate */ 507*0Sstevel@tonic-gate void 508*0Sstevel@tonic-gate dynamic_update(struct interface *ifp) 509*0Sstevel@tonic-gate { 510*0Sstevel@tonic-gate int delay; 511*0Sstevel@tonic-gate 512*0Sstevel@tonic-gate if (now.tv_sec - lastfullupdate.tv_sec >= 513*0Sstevel@tonic-gate supplyinterval - MIN_WAIT_TIME) 514*0Sstevel@tonic-gate return; 515*0Sstevel@tonic-gate 516*0Sstevel@tonic-gate if (now.tv_sec - lastmcast.tv_sec >= MIN_WAIT_TIME && 517*0Sstevel@tonic-gate /* BEGIN CSTYLED */ 518*0Sstevel@tonic-gate timercmp(&nextmcast, &now, <)) { 519*0Sstevel@tonic-gate /* END CSTYLED */ 520*0Sstevel@tonic-gate TRACE_ACTION("send dynamic update", 521*0Sstevel@tonic-gate (struct rt_entry *)NULL); 522*0Sstevel@tonic-gate supplyall(&allrouters, RTS_CHANGED, ifp, _B_TRUE); 523*0Sstevel@tonic-gate lastmcast = now; 524*0Sstevel@tonic-gate needupdate = _B_FALSE; 525*0Sstevel@tonic-gate nextmcast.tv_sec = 0; 526*0Sstevel@tonic-gate } else { 527*0Sstevel@tonic-gate needupdate = _B_TRUE; 528*0Sstevel@tonic-gate TRACE_ACTION("delay dynamic update", 529*0Sstevel@tonic-gate (struct rt_entry *)NULL); 530*0Sstevel@tonic-gate } 531*0Sstevel@tonic-gate 532*0Sstevel@tonic-gate if (nextmcast.tv_sec == 0) { 533*0Sstevel@tonic-gate delay = GET_RANDOM(MIN_WAIT_TIME * 1000000, 534*0Sstevel@tonic-gate MAX_WAIT_TIME * 1000000); 535*0Sstevel@tonic-gate if (tracing & ACTION_BIT) { 536*0Sstevel@tonic-gate (void) fprintf(ftrace, 537*0Sstevel@tonic-gate "inhibit dynamic update for %d msec\n", 538*0Sstevel@tonic-gate delay / 1000); 539*0Sstevel@tonic-gate (void) fflush(ftrace); 540*0Sstevel@tonic-gate } 541*0Sstevel@tonic-gate nextmcast.tv_sec = delay / 1000000; 542*0Sstevel@tonic-gate nextmcast.tv_usec = delay % 1000000; 543*0Sstevel@tonic-gate timevaladd(&nextmcast, &now); 544*0Sstevel@tonic-gate /* 545*0Sstevel@tonic-gate * If the next possibly dynamic update 546*0Sstevel@tonic-gate * is within MIN_WAIT_TIME of the next full 547*0Sstevel@tonic-gate * update, force the delay past the full 548*0Sstevel@tonic-gate * update, or we might send a dynamic update 549*0Sstevel@tonic-gate * just before the full update. 550*0Sstevel@tonic-gate */ 551*0Sstevel@tonic-gate if (nextmcast.tv_sec > 552*0Sstevel@tonic-gate lastfullupdate.tv_sec + supplyinterval - MIN_WAIT_TIME) { 553*0Sstevel@tonic-gate nextmcast.tv_sec = 554*0Sstevel@tonic-gate lastfullupdate.tv_sec + supplyinterval + 1; 555*0Sstevel@tonic-gate } 556*0Sstevel@tonic-gate } 557*0Sstevel@tonic-gate } 558