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 2004 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 boolean_t install = _B_TRUE; /* update kernel routing table */ 43*0Sstevel@tonic-gate struct rthash *net_hashes[IPV6_ABITS + 1]; 44*0Sstevel@tonic-gate 45*0Sstevel@tonic-gate /* 46*0Sstevel@tonic-gate * Size of routing socket message used by in.ripngd which includes the header, 47*0Sstevel@tonic-gate * space for the RTA_DST, RTA_GATEWAY and RTA_NETMASK (each a sockaddr_in6) 48*0Sstevel@tonic-gate * plus space for the RTA_IFP (a sockaddr_dl). 49*0Sstevel@tonic-gate */ 50*0Sstevel@tonic-gate #define RIPNG_RTM_MSGLEN sizeof (struct rt_msghdr) + \ 51*0Sstevel@tonic-gate sizeof (struct sockaddr_in6) + \ 52*0Sstevel@tonic-gate sizeof (struct sockaddr_in6) + \ 53*0Sstevel@tonic-gate sizeof (struct sockaddr_in6) + \ 54*0Sstevel@tonic-gate sizeof (struct sockaddr_dl) 55*0Sstevel@tonic-gate 56*0Sstevel@tonic-gate static int rtmseq; /* rtm_seq sequence number */ 57*0Sstevel@tonic-gate static int rtsock; /* Routing socket */ 58*0Sstevel@tonic-gate static struct rt_msghdr *rt_msg; /* Routing socket message */ 59*0Sstevel@tonic-gate static struct sockaddr_in6 *rta_dst; /* RTA_DST sockaddr */ 60*0Sstevel@tonic-gate static struct sockaddr_in6 *rta_gateway; /* RTA_GATEWAY sockaddr */ 61*0Sstevel@tonic-gate static struct sockaddr_in6 *rta_netmask; /* RTA_NETMASK sockaddr */ 62*0Sstevel@tonic-gate static struct sockaddr_dl *rta_ifp; /* RTA_IFP sockaddr */ 63*0Sstevel@tonic-gate 64*0Sstevel@tonic-gate /* simulate vax insque and remque instructions. */ 65*0Sstevel@tonic-gate 66*0Sstevel@tonic-gate typedef struct vq { 67*0Sstevel@tonic-gate caddr_t fwd, back; 68*0Sstevel@tonic-gate } vq_t; 69*0Sstevel@tonic-gate 70*0Sstevel@tonic-gate #define insque(e, p) ((vq_t *)(e))->back = (caddr_t)(p); \ 71*0Sstevel@tonic-gate ((vq_t *)(e))->fwd = \ 72*0Sstevel@tonic-gate (caddr_t)((vq_t *)((vq_t *)(p))->fwd); \ 73*0Sstevel@tonic-gate ((vq_t *)((vq_t *)(p))->fwd)->back = (caddr_t)(e); \ 74*0Sstevel@tonic-gate ((vq_t *)(p))->fwd = (caddr_t)(e); 75*0Sstevel@tonic-gate 76*0Sstevel@tonic-gate #define remque(e) ((vq_t *)((vq_t *)(e))->back)->fwd = \ 77*0Sstevel@tonic-gate (caddr_t)((vq_t *)(e))->fwd; \ 78*0Sstevel@tonic-gate ((vq_t *)((vq_t *)(e))->fwd)->back = \ 79*0Sstevel@tonic-gate (caddr_t)((vq_t *)(e))->back; \ 80*0Sstevel@tonic-gate ((vq_t *)(e))->fwd = NULL; \ 81*0Sstevel@tonic-gate ((vq_t *)(e))->back = NULL; 82*0Sstevel@tonic-gate 83*0Sstevel@tonic-gate static void 84*0Sstevel@tonic-gate log_change(int level, struct rt_entry *orig, struct rt_entry *new) 85*0Sstevel@tonic-gate { 86*0Sstevel@tonic-gate char buf1[INET6_ADDRSTRLEN]; 87*0Sstevel@tonic-gate char buf2[INET6_ADDRSTRLEN]; 88*0Sstevel@tonic-gate char buf3[INET6_ADDRSTRLEN]; 89*0Sstevel@tonic-gate 90*0Sstevel@tonic-gate (void) inet_ntop(AF_INET6, (void *) &new->rt_dst, buf1, sizeof (buf1)); 91*0Sstevel@tonic-gate (void) inet_ntop(AF_INET6, (void *) &orig->rt_router, buf2, 92*0Sstevel@tonic-gate sizeof (buf2)); 93*0Sstevel@tonic-gate (void) inet_ntop(AF_INET6, (void *) &new->rt_router, buf3, 94*0Sstevel@tonic-gate sizeof (buf3)); 95*0Sstevel@tonic-gate 96*0Sstevel@tonic-gate syslog(level, "\tdst %s from gw %s if %s to gw %s if %s metric %d", 97*0Sstevel@tonic-gate buf1, buf2, 98*0Sstevel@tonic-gate (orig->rt_ifp != NULL && orig->rt_ifp->int_name != NULL) ? 99*0Sstevel@tonic-gate orig->rt_ifp->int_name : "(noname)", 100*0Sstevel@tonic-gate buf3, 101*0Sstevel@tonic-gate (new->rt_ifp != NULL && new->rt_ifp->int_name != NULL) ? 102*0Sstevel@tonic-gate new->rt_ifp->int_name : "(noname)", new->rt_metric); 103*0Sstevel@tonic-gate } 104*0Sstevel@tonic-gate 105*0Sstevel@tonic-gate static void 106*0Sstevel@tonic-gate log_single(int level, struct rt_entry *rt) 107*0Sstevel@tonic-gate { 108*0Sstevel@tonic-gate char buf1[INET6_ADDRSTRLEN]; 109*0Sstevel@tonic-gate char buf2[INET6_ADDRSTRLEN]; 110*0Sstevel@tonic-gate 111*0Sstevel@tonic-gate (void) inet_ntop(AF_INET6, (void *)&rt->rt_dst, buf1, sizeof (buf1)); 112*0Sstevel@tonic-gate (void) inet_ntop(AF_INET6, (void *)&rt->rt_router, buf2, sizeof (buf2)); 113*0Sstevel@tonic-gate 114*0Sstevel@tonic-gate syslog(level, "\tdst %s gw %s if %s metric %d", 115*0Sstevel@tonic-gate buf1, buf2, 116*0Sstevel@tonic-gate (rt->rt_ifp != NULL && rt->rt_ifp->int_name != NULL) ? 117*0Sstevel@tonic-gate rt->rt_ifp->int_name : "(noname)", 118*0Sstevel@tonic-gate rt->rt_metric); 119*0Sstevel@tonic-gate } 120*0Sstevel@tonic-gate 121*0Sstevel@tonic-gate /* 122*0Sstevel@tonic-gate * Computes a hash by XOR-ing the (up to sixteen) octets that make up an IPv6 123*0Sstevel@tonic-gate * address. This function assumes that that there are no one-bits in the 124*0Sstevel@tonic-gate * address beyond the prefix length. 125*0Sstevel@tonic-gate */ 126*0Sstevel@tonic-gate static uint8_t 127*0Sstevel@tonic-gate rthash(struct in6_addr *dst, int prefix_length) 128*0Sstevel@tonic-gate { 129*0Sstevel@tonic-gate uint8_t val = 0; 130*0Sstevel@tonic-gate int i; 131*0Sstevel@tonic-gate 132*0Sstevel@tonic-gate for (i = 0; prefix_length > 0; prefix_length -= 8, i++) 133*0Sstevel@tonic-gate val ^= dst->s6_addr[i]; 134*0Sstevel@tonic-gate return (val); 135*0Sstevel@tonic-gate } 136*0Sstevel@tonic-gate 137*0Sstevel@tonic-gate /* 138*0Sstevel@tonic-gate * Given a prefix length, fill in the struct in6_addr representing an IPv6 139*0Sstevel@tonic-gate * netmask. 140*0Sstevel@tonic-gate */ 141*0Sstevel@tonic-gate static void 142*0Sstevel@tonic-gate rtmask_to_bits(uint_t prefix_length, struct in6_addr *prefix) 143*0Sstevel@tonic-gate { 144*0Sstevel@tonic-gate uint_t mask = 0xff; 145*0Sstevel@tonic-gate int i; 146*0Sstevel@tonic-gate 147*0Sstevel@tonic-gate bzero((caddr_t)prefix, sizeof (struct in6_addr)); 148*0Sstevel@tonic-gate for (i = 0; prefix_length >= 8; prefix_length -= 8, i++) 149*0Sstevel@tonic-gate prefix->s6_addr[i] = 0xff; 150*0Sstevel@tonic-gate mask = (mask << (8 - prefix_length)); 151*0Sstevel@tonic-gate if (mask != 0) 152*0Sstevel@tonic-gate prefix->s6_addr[i] = mask; 153*0Sstevel@tonic-gate } 154*0Sstevel@tonic-gate 155*0Sstevel@tonic-gate void 156*0Sstevel@tonic-gate rtcreate_prefix(struct in6_addr *p1, struct in6_addr *dst, int bits) 157*0Sstevel@tonic-gate { 158*0Sstevel@tonic-gate uchar_t mask; 159*0Sstevel@tonic-gate int j; 160*0Sstevel@tonic-gate 161*0Sstevel@tonic-gate for (j = 0; bits >= 8; bits -= 8, j++) 162*0Sstevel@tonic-gate dst->s6_addr[j] = p1->s6_addr[j]; 163*0Sstevel@tonic-gate 164*0Sstevel@tonic-gate if (bits != 0) { 165*0Sstevel@tonic-gate mask = 0xff << (8 - bits); 166*0Sstevel@tonic-gate dst->s6_addr[j] = p1->s6_addr[j] & mask; 167*0Sstevel@tonic-gate j++; 168*0Sstevel@tonic-gate } 169*0Sstevel@tonic-gate 170*0Sstevel@tonic-gate for (; j < 16; j++) 171*0Sstevel@tonic-gate dst->s6_addr[j] = 0; 172*0Sstevel@tonic-gate } 173*0Sstevel@tonic-gate 174*0Sstevel@tonic-gate /* 175*0Sstevel@tonic-gate * Lookup dst in the tables for an exact match. 176*0Sstevel@tonic-gate */ 177*0Sstevel@tonic-gate struct rt_entry * 178*0Sstevel@tonic-gate rtlookup(struct in6_addr *dst, int prefix_length) 179*0Sstevel@tonic-gate { 180*0Sstevel@tonic-gate struct rt_entry *rt; 181*0Sstevel@tonic-gate struct rthash *rh; 182*0Sstevel@tonic-gate uint_t hash; 183*0Sstevel@tonic-gate 184*0Sstevel@tonic-gate if (net_hashes[prefix_length] == NULL) 185*0Sstevel@tonic-gate return (NULL); 186*0Sstevel@tonic-gate 187*0Sstevel@tonic-gate hash = rthash(dst, prefix_length); 188*0Sstevel@tonic-gate 189*0Sstevel@tonic-gate rh = &net_hashes[prefix_length][hash & ROUTEHASHMASK]; 190*0Sstevel@tonic-gate 191*0Sstevel@tonic-gate for (rt = rh->rt_forw; rt != (struct rt_entry *)rh; rt = rt->rt_forw) { 192*0Sstevel@tonic-gate if (rt->rt_hash != hash) 193*0Sstevel@tonic-gate continue; 194*0Sstevel@tonic-gate if (IN6_ARE_ADDR_EQUAL(&rt->rt_dst, dst) && 195*0Sstevel@tonic-gate rt->rt_prefix_length == prefix_length) 196*0Sstevel@tonic-gate return (rt); 197*0Sstevel@tonic-gate } 198*0Sstevel@tonic-gate return (NULL); 199*0Sstevel@tonic-gate } 200*0Sstevel@tonic-gate 201*0Sstevel@tonic-gate /* 202*0Sstevel@tonic-gate * Given an IPv6 prefix (destination and prefix length), a gateway, an 203*0Sstevel@tonic-gate * interface name and route flags, send down the requested command returning 204*0Sstevel@tonic-gate * the return value and errno (in the case of error) from the write() on the 205*0Sstevel@tonic-gate * routing socket. 206*0Sstevel@tonic-gate */ 207*0Sstevel@tonic-gate static int 208*0Sstevel@tonic-gate rtcmd(uchar_t type, struct in6_addr *dst, struct in6_addr *gateway, 209*0Sstevel@tonic-gate uint_t prefix_length, char *name, int flags) 210*0Sstevel@tonic-gate { 211*0Sstevel@tonic-gate int rlen; 212*0Sstevel@tonic-gate 213*0Sstevel@tonic-gate rta_ifp->sdl_index = if_nametoindex(name); 214*0Sstevel@tonic-gate if (rta_ifp->sdl_index == 0) 215*0Sstevel@tonic-gate return (-1); 216*0Sstevel@tonic-gate 217*0Sstevel@tonic-gate rta_dst->sin6_addr = *dst; 218*0Sstevel@tonic-gate rta_gateway->sin6_addr = *gateway; 219*0Sstevel@tonic-gate rtmask_to_bits(prefix_length, &rta_netmask->sin6_addr); 220*0Sstevel@tonic-gate 221*0Sstevel@tonic-gate rt_msg->rtm_type = type; 222*0Sstevel@tonic-gate rt_msg->rtm_flags = flags; 223*0Sstevel@tonic-gate rt_msg->rtm_seq = ++rtmseq; 224*0Sstevel@tonic-gate rlen = write(rtsock, rt_msg, RIPNG_RTM_MSGLEN); 225*0Sstevel@tonic-gate if (rlen >= 0 && rlen < RIPNG_RTM_MSGLEN) { 226*0Sstevel@tonic-gate syslog(LOG_ERR, 227*0Sstevel@tonic-gate "rtcmd: write to routing socket got only %d for rlen\n", 228*0Sstevel@tonic-gate rlen); 229*0Sstevel@tonic-gate } 230*0Sstevel@tonic-gate return (rlen); 231*0Sstevel@tonic-gate } 232*0Sstevel@tonic-gate 233*0Sstevel@tonic-gate void 234*0Sstevel@tonic-gate rtadd(struct in6_addr *dst, struct in6_addr *gate, int prefix_length, 235*0Sstevel@tonic-gate int metric, int tag, boolean_t ifroute, struct interface *ifp) 236*0Sstevel@tonic-gate { 237*0Sstevel@tonic-gate struct rt_entry *rt; 238*0Sstevel@tonic-gate struct rthash *rh; 239*0Sstevel@tonic-gate uint_t hash; 240*0Sstevel@tonic-gate struct in6_addr pdst; 241*0Sstevel@tonic-gate int rlen; 242*0Sstevel@tonic-gate 243*0Sstevel@tonic-gate if (metric >= HOPCNT_INFINITY) 244*0Sstevel@tonic-gate return; 245*0Sstevel@tonic-gate 246*0Sstevel@tonic-gate if (net_hashes[prefix_length] == NULL) { 247*0Sstevel@tonic-gate struct rthash *trh; 248*0Sstevel@tonic-gate 249*0Sstevel@tonic-gate rh = (struct rthash *) 250*0Sstevel@tonic-gate calloc(ROUTEHASHSIZ, sizeof (struct rt_entry)); 251*0Sstevel@tonic-gate if (rh == NULL) 252*0Sstevel@tonic-gate return; 253*0Sstevel@tonic-gate for (trh = rh; trh < &rh[ROUTEHASHSIZ]; trh++) 254*0Sstevel@tonic-gate trh->rt_forw = trh->rt_back = (struct rt_entry *)trh; 255*0Sstevel@tonic-gate net_hashes[prefix_length] = rh; 256*0Sstevel@tonic-gate } 257*0Sstevel@tonic-gate rtcreate_prefix(dst, &pdst, prefix_length); 258*0Sstevel@tonic-gate 259*0Sstevel@tonic-gate hash = rthash(&pdst, prefix_length); 260*0Sstevel@tonic-gate rh = &net_hashes[prefix_length][hash & ROUTEHASHMASK]; 261*0Sstevel@tonic-gate rt = (struct rt_entry *)malloc(sizeof (*rt)); 262*0Sstevel@tonic-gate if (rt == NULL) { 263*0Sstevel@tonic-gate /* 264*0Sstevel@tonic-gate * In the event of an allocation failure, log the error and 265*0Sstevel@tonic-gate * continue since on the next update another attempt will be 266*0Sstevel@tonic-gate * made. 267*0Sstevel@tonic-gate */ 268*0Sstevel@tonic-gate syslog(LOG_ERR, "rtadd: malloc: %m"); 269*0Sstevel@tonic-gate return; 270*0Sstevel@tonic-gate } 271*0Sstevel@tonic-gate rt->rt_hash = hash; 272*0Sstevel@tonic-gate rt->rt_dst = pdst; 273*0Sstevel@tonic-gate rt->rt_prefix_length = prefix_length; 274*0Sstevel@tonic-gate rt->rt_router = *gate; 275*0Sstevel@tonic-gate rt->rt_metric = metric; 276*0Sstevel@tonic-gate rt->rt_tag = tag; 277*0Sstevel@tonic-gate rt->rt_timer = 0; 278*0Sstevel@tonic-gate rt->rt_flags = RTF_UP; 279*0Sstevel@tonic-gate if (prefix_length == IPV6_ABITS) 280*0Sstevel@tonic-gate rt->rt_flags |= RTF_HOST; 281*0Sstevel@tonic-gate rt->rt_state = RTS_CHANGED; 282*0Sstevel@tonic-gate if (ifroute) { 283*0Sstevel@tonic-gate rt->rt_state |= RTS_INTERFACE; 284*0Sstevel@tonic-gate if (ifp->int_flags & RIP6_IFF_PRIVATE) 285*0Sstevel@tonic-gate rt->rt_state |= RTS_PRIVATE; 286*0Sstevel@tonic-gate } else { 287*0Sstevel@tonic-gate rt->rt_flags |= RTF_GATEWAY; 288*0Sstevel@tonic-gate } 289*0Sstevel@tonic-gate rt->rt_ifp = ifp; 290*0Sstevel@tonic-gate 291*0Sstevel@tonic-gate insque(rt, rh); 292*0Sstevel@tonic-gate TRACE_ACTION("ADD", rt); 293*0Sstevel@tonic-gate /* 294*0Sstevel@tonic-gate * If the RTM_ADD fails because the gateway is unreachable 295*0Sstevel@tonic-gate * from this host, discard the entry. This should never 296*0Sstevel@tonic-gate * happen. 297*0Sstevel@tonic-gate */ 298*0Sstevel@tonic-gate if (install && (rt->rt_state & RTS_INTERFACE) == 0) { 299*0Sstevel@tonic-gate rlen = rtcmd(RTM_ADD, &rt->rt_dst, &rt->rt_router, 300*0Sstevel@tonic-gate prefix_length, ifp->int_name, rt->rt_flags); 301*0Sstevel@tonic-gate if (rlen < 0) { 302*0Sstevel@tonic-gate if (errno != EEXIST) { 303*0Sstevel@tonic-gate syslog(LOG_ERR, "rtadd: RTM_ADD: %m"); 304*0Sstevel@tonic-gate log_single(LOG_ERR, rt); 305*0Sstevel@tonic-gate } 306*0Sstevel@tonic-gate if (errno == ENETUNREACH) { 307*0Sstevel@tonic-gate TRACE_ACTION("DELETE", rt); 308*0Sstevel@tonic-gate remque(rt); 309*0Sstevel@tonic-gate free((char *)rt); 310*0Sstevel@tonic-gate } 311*0Sstevel@tonic-gate } else if (rlen < RIPNG_RTM_MSGLEN) { 312*0Sstevel@tonic-gate log_single(LOG_ERR, rt); 313*0Sstevel@tonic-gate } 314*0Sstevel@tonic-gate } 315*0Sstevel@tonic-gate } 316*0Sstevel@tonic-gate 317*0Sstevel@tonic-gate /* 318*0Sstevel@tonic-gate * Handle the case when the metric changes but the gateway is the same (or the 319*0Sstevel@tonic-gate * interface index associated with the gateway changes), or when both gateway 320*0Sstevel@tonic-gate * and metric changes, or when only the gateway changes but the existing route 321*0Sstevel@tonic-gate * is more than one-half of EXPIRE_TIME in age. Note that routes with metric >= 322*0Sstevel@tonic-gate * HOPCNT_INFINITY are not in the kernel. 323*0Sstevel@tonic-gate */ 324*0Sstevel@tonic-gate void 325*0Sstevel@tonic-gate rtchange(struct rt_entry *rt, struct in6_addr *gate, short metric, 326*0Sstevel@tonic-gate struct interface *ifp) 327*0Sstevel@tonic-gate { 328*0Sstevel@tonic-gate boolean_t dokern = _B_FALSE; 329*0Sstevel@tonic-gate boolean_t dokerndelete; 330*0Sstevel@tonic-gate boolean_t metricchanged = _B_FALSE; 331*0Sstevel@tonic-gate int oldmetric; 332*0Sstevel@tonic-gate struct rt_entry oldroute; 333*0Sstevel@tonic-gate int rlen; 334*0Sstevel@tonic-gate 335*0Sstevel@tonic-gate if (metric >= HOPCNT_INFINITY) { 336*0Sstevel@tonic-gate rtdown(rt); 337*0Sstevel@tonic-gate return; 338*0Sstevel@tonic-gate } 339*0Sstevel@tonic-gate 340*0Sstevel@tonic-gate if (!IN6_ARE_ADDR_EQUAL(&rt->rt_router, gate) || rt->rt_ifp != ifp) 341*0Sstevel@tonic-gate dokern = _B_TRUE; 342*0Sstevel@tonic-gate oldmetric = rt->rt_metric; 343*0Sstevel@tonic-gate if (oldmetric >= HOPCNT_INFINITY) 344*0Sstevel@tonic-gate dokerndelete = _B_FALSE; 345*0Sstevel@tonic-gate else 346*0Sstevel@tonic-gate dokerndelete = dokern; 347*0Sstevel@tonic-gate if (metric != rt->rt_metric) 348*0Sstevel@tonic-gate metricchanged = _B_TRUE; 349*0Sstevel@tonic-gate rt->rt_timer = 0; 350*0Sstevel@tonic-gate if (dokern || metricchanged) { 351*0Sstevel@tonic-gate TRACE_ACTION("CHANGE FROM", rt); 352*0Sstevel@tonic-gate if ((rt->rt_state & RTS_INTERFACE) && metric != 0) { 353*0Sstevel@tonic-gate rt->rt_state &= ~RTS_INTERFACE; 354*0Sstevel@tonic-gate if (rt->rt_ifp != NULL) { 355*0Sstevel@tonic-gate syslog(LOG_ERR, 356*0Sstevel@tonic-gate "rtchange: changing route from " 357*0Sstevel@tonic-gate "interface %s (timed out)", 358*0Sstevel@tonic-gate (rt->rt_ifp->int_name != NULL) ? 359*0Sstevel@tonic-gate rt->rt_ifp->int_name : "(noname)"); 360*0Sstevel@tonic-gate } else { 361*0Sstevel@tonic-gate syslog(LOG_ERR, 362*0Sstevel@tonic-gate "rtchange: " 363*0Sstevel@tonic-gate "changing route no interface for route"); 364*0Sstevel@tonic-gate } 365*0Sstevel@tonic-gate } 366*0Sstevel@tonic-gate if (dokern) { 367*0Sstevel@tonic-gate oldroute = *rt; 368*0Sstevel@tonic-gate rt->rt_router = *gate; 369*0Sstevel@tonic-gate rt->rt_ifp = ifp; 370*0Sstevel@tonic-gate } 371*0Sstevel@tonic-gate rt->rt_metric = metric; 372*0Sstevel@tonic-gate if (!(rt->rt_state & RTS_INTERFACE)) 373*0Sstevel@tonic-gate rt->rt_flags |= RTF_GATEWAY; 374*0Sstevel@tonic-gate else 375*0Sstevel@tonic-gate rt->rt_flags &= ~RTF_GATEWAY; 376*0Sstevel@tonic-gate rt->rt_state |= RTS_CHANGED; 377*0Sstevel@tonic-gate TRACE_ACTION("CHANGE TO", rt); 378*0Sstevel@tonic-gate } 379*0Sstevel@tonic-gate if (install && (rt->rt_state & RTS_INTERFACE) == 0) { 380*0Sstevel@tonic-gate if (dokerndelete) { 381*0Sstevel@tonic-gate rlen = rtcmd(RTM_ADD, &rt->rt_dst, &rt->rt_router, 382*0Sstevel@tonic-gate rt->rt_prefix_length, rt->rt_ifp->int_name, 383*0Sstevel@tonic-gate rt->rt_flags); 384*0Sstevel@tonic-gate if (rlen < 0) { 385*0Sstevel@tonic-gate if (errno != EEXIST) { 386*0Sstevel@tonic-gate syslog(LOG_ERR, 387*0Sstevel@tonic-gate "rtchange: RTM_ADD: %m"); 388*0Sstevel@tonic-gate log_change(LOG_ERR, rt, 389*0Sstevel@tonic-gate (struct rt_entry *)&oldroute); 390*0Sstevel@tonic-gate } 391*0Sstevel@tonic-gate } else if (rlen < RIPNG_RTM_MSGLEN) { 392*0Sstevel@tonic-gate log_change(LOG_ERR, rt, 393*0Sstevel@tonic-gate (struct rt_entry *)&oldroute); 394*0Sstevel@tonic-gate } 395*0Sstevel@tonic-gate 396*0Sstevel@tonic-gate rlen = rtcmd(RTM_DELETE, &oldroute.rt_dst, 397*0Sstevel@tonic-gate &oldroute.rt_router, oldroute.rt_prefix_length, 398*0Sstevel@tonic-gate oldroute.rt_ifp->int_name, oldroute.rt_flags); 399*0Sstevel@tonic-gate if (rlen < 0) { 400*0Sstevel@tonic-gate syslog(LOG_ERR, "rtchange: RTM_DELETE: %m"); 401*0Sstevel@tonic-gate log_change(LOG_ERR, rt, 402*0Sstevel@tonic-gate (struct rt_entry *)&oldroute); 403*0Sstevel@tonic-gate } else if (rlen < RIPNG_RTM_MSGLEN) { 404*0Sstevel@tonic-gate log_change(LOG_ERR, rt, 405*0Sstevel@tonic-gate (struct rt_entry *)&oldroute); 406*0Sstevel@tonic-gate } 407*0Sstevel@tonic-gate } else if (dokern || oldmetric >= HOPCNT_INFINITY) { 408*0Sstevel@tonic-gate rlen = rtcmd(RTM_ADD, &rt->rt_dst, &rt->rt_router, 409*0Sstevel@tonic-gate rt->rt_prefix_length, ifp->int_name, rt->rt_flags); 410*0Sstevel@tonic-gate if (rlen < 0 && errno != EEXIST) { 411*0Sstevel@tonic-gate syslog(LOG_ERR, "rtchange: RTM_ADD: %m"); 412*0Sstevel@tonic-gate log_change(LOG_ERR, rt, 413*0Sstevel@tonic-gate (struct rt_entry *)&oldroute); 414*0Sstevel@tonic-gate } else if (rlen < RIPNG_RTM_MSGLEN) { 415*0Sstevel@tonic-gate log_change(LOG_ERR, rt, 416*0Sstevel@tonic-gate (struct rt_entry *)&oldroute); 417*0Sstevel@tonic-gate } 418*0Sstevel@tonic-gate } 419*0Sstevel@tonic-gate } 420*0Sstevel@tonic-gate } 421*0Sstevel@tonic-gate 422*0Sstevel@tonic-gate void 423*0Sstevel@tonic-gate rtdown(struct rt_entry *rt) 424*0Sstevel@tonic-gate { 425*0Sstevel@tonic-gate int rlen; 426*0Sstevel@tonic-gate 427*0Sstevel@tonic-gate if (rt->rt_metric != HOPCNT_INFINITY) { 428*0Sstevel@tonic-gate TRACE_ACTION("DELETE", rt); 429*0Sstevel@tonic-gate if (install && (rt->rt_state & RTS_INTERFACE) == 0) { 430*0Sstevel@tonic-gate rlen = rtcmd(RTM_DELETE, &rt->rt_dst, 431*0Sstevel@tonic-gate &rt->rt_router, rt->rt_prefix_length, 432*0Sstevel@tonic-gate rt->rt_ifp->int_name, rt->rt_flags); 433*0Sstevel@tonic-gate if (rlen < 0) { 434*0Sstevel@tonic-gate syslog(LOG_ERR, "rtdown: RTM_DELETE: %m"); 435*0Sstevel@tonic-gate log_single(LOG_ERR, rt); 436*0Sstevel@tonic-gate } else if (rlen < RIPNG_RTM_MSGLEN) { 437*0Sstevel@tonic-gate log_single(LOG_ERR, rt); 438*0Sstevel@tonic-gate } 439*0Sstevel@tonic-gate } 440*0Sstevel@tonic-gate rt->rt_metric = HOPCNT_INFINITY; 441*0Sstevel@tonic-gate rt->rt_state |= RTS_CHANGED; 442*0Sstevel@tonic-gate } 443*0Sstevel@tonic-gate if (rt->rt_timer < EXPIRE_TIME) 444*0Sstevel@tonic-gate rt->rt_timer = EXPIRE_TIME; 445*0Sstevel@tonic-gate } 446*0Sstevel@tonic-gate 447*0Sstevel@tonic-gate void 448*0Sstevel@tonic-gate rtdelete(struct rt_entry *rt) 449*0Sstevel@tonic-gate { 450*0Sstevel@tonic-gate 451*0Sstevel@tonic-gate if (rt->rt_state & RTS_INTERFACE) { 452*0Sstevel@tonic-gate if (rt->rt_ifp != NULL) { 453*0Sstevel@tonic-gate syslog(LOG_ERR, 454*0Sstevel@tonic-gate "rtdelete: " 455*0Sstevel@tonic-gate "deleting route to interface %s (timed out)", 456*0Sstevel@tonic-gate (rt->rt_ifp->int_name != NULL) ? 457*0Sstevel@tonic-gate rt->rt_ifp->int_name : "(noname)"); 458*0Sstevel@tonic-gate log_single(LOG_ERR, rt); 459*0Sstevel@tonic-gate } 460*0Sstevel@tonic-gate } 461*0Sstevel@tonic-gate rtdown(rt); 462*0Sstevel@tonic-gate remque(rt); 463*0Sstevel@tonic-gate free((char *)rt); 464*0Sstevel@tonic-gate } 465*0Sstevel@tonic-gate 466*0Sstevel@tonic-gate /* 467*0Sstevel@tonic-gate * Mark all the routes heard off a particular interface "down". Unlike the 468*0Sstevel@tonic-gate * routes managed by in.routed, all of these routes have an interface associated 469*0Sstevel@tonic-gate * with them. 470*0Sstevel@tonic-gate */ 471*0Sstevel@tonic-gate void 472*0Sstevel@tonic-gate rtpurgeif(struct interface *ifp) 473*0Sstevel@tonic-gate { 474*0Sstevel@tonic-gate struct rthash *rh; 475*0Sstevel@tonic-gate struct rt_entry *rt; 476*0Sstevel@tonic-gate int i; 477*0Sstevel@tonic-gate 478*0Sstevel@tonic-gate for (i = IPV6_ABITS; i >= 0; i--) { 479*0Sstevel@tonic-gate if (net_hashes[i] == NULL) 480*0Sstevel@tonic-gate continue; 481*0Sstevel@tonic-gate 482*0Sstevel@tonic-gate for (rh = net_hashes[i]; 483*0Sstevel@tonic-gate rh < &net_hashes[i][ROUTEHASHSIZ]; rh++) { 484*0Sstevel@tonic-gate for (rt = rh->rt_forw; rt != (struct rt_entry *)rh; 485*0Sstevel@tonic-gate rt = rt->rt_forw) { 486*0Sstevel@tonic-gate if (rt->rt_ifp == ifp) { 487*0Sstevel@tonic-gate rtdown(rt); 488*0Sstevel@tonic-gate rt->rt_ifp = NULL; 489*0Sstevel@tonic-gate rt->rt_state &= ~RTS_INTERFACE; 490*0Sstevel@tonic-gate } 491*0Sstevel@tonic-gate } 492*0Sstevel@tonic-gate } 493*0Sstevel@tonic-gate } 494*0Sstevel@tonic-gate } 495*0Sstevel@tonic-gate 496*0Sstevel@tonic-gate /* 497*0Sstevel@tonic-gate * Called when the subnetmask has changed on one or more interfaces. 498*0Sstevel@tonic-gate * Re-evaluates all non-interface routes by doing a rtchange so that 499*0Sstevel@tonic-gate * routes that were believed to be host routes before the netmask change 500*0Sstevel@tonic-gate * can be converted to network routes and vice versa. 501*0Sstevel@tonic-gate */ 502*0Sstevel@tonic-gate void 503*0Sstevel@tonic-gate rtchangeall(void) 504*0Sstevel@tonic-gate { 505*0Sstevel@tonic-gate struct rthash *rh; 506*0Sstevel@tonic-gate struct rt_entry *rt; 507*0Sstevel@tonic-gate int i; 508*0Sstevel@tonic-gate 509*0Sstevel@tonic-gate for (i = IPV6_ABITS; i >= 0; i--) { 510*0Sstevel@tonic-gate if (net_hashes[i] == NULL) 511*0Sstevel@tonic-gate continue; 512*0Sstevel@tonic-gate 513*0Sstevel@tonic-gate for (rh = net_hashes[i]; 514*0Sstevel@tonic-gate rh < &net_hashes[i][ROUTEHASHSIZ]; rh++) { 515*0Sstevel@tonic-gate for (rt = rh->rt_forw; rt != (struct rt_entry *)rh; 516*0Sstevel@tonic-gate rt = rt->rt_forw) { 517*0Sstevel@tonic-gate if ((rt->rt_state & RTS_INTERFACE) == 0) { 518*0Sstevel@tonic-gate rtchange(rt, &rt->rt_router, 519*0Sstevel@tonic-gate rt->rt_metric, rt->rt_ifp); 520*0Sstevel@tonic-gate } 521*0Sstevel@tonic-gate } 522*0Sstevel@tonic-gate } 523*0Sstevel@tonic-gate } 524*0Sstevel@tonic-gate } 525*0Sstevel@tonic-gate 526*0Sstevel@tonic-gate static void 527*0Sstevel@tonic-gate rtdumpentry(FILE *fp, struct rt_entry *rt) 528*0Sstevel@tonic-gate { 529*0Sstevel@tonic-gate char buf1[INET6_ADDRSTRLEN]; 530*0Sstevel@tonic-gate static struct bits { 531*0Sstevel@tonic-gate ulong_t t_bits; 532*0Sstevel@tonic-gate char *t_name; 533*0Sstevel@tonic-gate } flagbits[] = { 534*0Sstevel@tonic-gate /* BEGIN CSTYLED */ 535*0Sstevel@tonic-gate { RTF_UP, "UP" }, 536*0Sstevel@tonic-gate { RTF_GATEWAY, "GATEWAY" }, 537*0Sstevel@tonic-gate { RTF_HOST, "HOST" }, 538*0Sstevel@tonic-gate { 0, NULL } 539*0Sstevel@tonic-gate /* END CSTYLED */ 540*0Sstevel@tonic-gate }, statebits[] = { 541*0Sstevel@tonic-gate /* BEGIN CSTYLED */ 542*0Sstevel@tonic-gate { RTS_INTERFACE, "INTERFACE" }, 543*0Sstevel@tonic-gate { RTS_CHANGED, "CHANGED" }, 544*0Sstevel@tonic-gate { RTS_PRIVATE, "PRIVATE" }, 545*0Sstevel@tonic-gate { 0, NULL } 546*0Sstevel@tonic-gate /* END CSTYLED */ 547*0Sstevel@tonic-gate }; 548*0Sstevel@tonic-gate struct bits *p; 549*0Sstevel@tonic-gate boolean_t first; 550*0Sstevel@tonic-gate char c; 551*0Sstevel@tonic-gate 552*0Sstevel@tonic-gate (void) fprintf(fp, "prefix %s/%d ", 553*0Sstevel@tonic-gate inet_ntop(AF_INET6, (void *)&rt->rt_dst, buf1, sizeof (buf1)), 554*0Sstevel@tonic-gate rt->rt_prefix_length); 555*0Sstevel@tonic-gate (void) fprintf(fp, "via %s metric %d timer %d", 556*0Sstevel@tonic-gate inet_ntop(AF_INET6, (void *)&rt->rt_router, buf1, sizeof (buf1)), 557*0Sstevel@tonic-gate rt->rt_metric, rt->rt_timer); 558*0Sstevel@tonic-gate if (rt->rt_ifp != NULL) { 559*0Sstevel@tonic-gate (void) fprintf(fp, " if %s", 560*0Sstevel@tonic-gate (rt->rt_ifp->int_name != NULL) ? 561*0Sstevel@tonic-gate rt->rt_ifp->int_name : "(noname)"); 562*0Sstevel@tonic-gate } 563*0Sstevel@tonic-gate (void) fprintf(fp, " state"); 564*0Sstevel@tonic-gate c = ' '; 565*0Sstevel@tonic-gate for (first = _B_TRUE, p = statebits; p->t_bits > 0; p++) { 566*0Sstevel@tonic-gate if ((rt->rt_state & p->t_bits) == 0) 567*0Sstevel@tonic-gate continue; 568*0Sstevel@tonic-gate (void) fprintf(fp, "%c%s", c, p->t_name); 569*0Sstevel@tonic-gate if (first) { 570*0Sstevel@tonic-gate c = '|'; 571*0Sstevel@tonic-gate first = _B_FALSE; 572*0Sstevel@tonic-gate } 573*0Sstevel@tonic-gate } 574*0Sstevel@tonic-gate if (first) 575*0Sstevel@tonic-gate (void) fprintf(fp, " 0"); 576*0Sstevel@tonic-gate if (rt->rt_flags & (RTF_UP | RTF_GATEWAY)) { 577*0Sstevel@tonic-gate c = ' '; 578*0Sstevel@tonic-gate for (first = _B_TRUE, p = flagbits; p->t_bits > 0; p++) { 579*0Sstevel@tonic-gate if ((rt->rt_flags & p->t_bits) == 0) 580*0Sstevel@tonic-gate continue; 581*0Sstevel@tonic-gate (void) fprintf(fp, "%c%s", c, p->t_name); 582*0Sstevel@tonic-gate if (first) { 583*0Sstevel@tonic-gate c = '|'; 584*0Sstevel@tonic-gate first = _B_FALSE; 585*0Sstevel@tonic-gate } 586*0Sstevel@tonic-gate } 587*0Sstevel@tonic-gate } 588*0Sstevel@tonic-gate (void) putc('\n', fp); 589*0Sstevel@tonic-gate (void) fflush(fp); 590*0Sstevel@tonic-gate } 591*0Sstevel@tonic-gate 592*0Sstevel@tonic-gate static void 593*0Sstevel@tonic-gate rtdump2(FILE *fp) 594*0Sstevel@tonic-gate { 595*0Sstevel@tonic-gate struct rthash *rh; 596*0Sstevel@tonic-gate struct rt_entry *rt; 597*0Sstevel@tonic-gate int i; 598*0Sstevel@tonic-gate 599*0Sstevel@tonic-gate for (i = IPV6_ABITS; i >= 0; i--) { 600*0Sstevel@tonic-gate if (net_hashes[i] == NULL) 601*0Sstevel@tonic-gate continue; 602*0Sstevel@tonic-gate 603*0Sstevel@tonic-gate for (rh = net_hashes[i]; 604*0Sstevel@tonic-gate rh < &net_hashes[i][ROUTEHASHSIZ]; rh++) { 605*0Sstevel@tonic-gate for (rt = rh->rt_forw; rt != (struct rt_entry *)rh; 606*0Sstevel@tonic-gate rt = rt->rt_forw) { 607*0Sstevel@tonic-gate rtdumpentry(fp, rt); 608*0Sstevel@tonic-gate } 609*0Sstevel@tonic-gate } 610*0Sstevel@tonic-gate } 611*0Sstevel@tonic-gate } 612*0Sstevel@tonic-gate 613*0Sstevel@tonic-gate void 614*0Sstevel@tonic-gate rtdump(void) 615*0Sstevel@tonic-gate { 616*0Sstevel@tonic-gate if (ftrace != NULL) 617*0Sstevel@tonic-gate rtdump2(ftrace); 618*0Sstevel@tonic-gate else 619*0Sstevel@tonic-gate rtdump2(stderr); 620*0Sstevel@tonic-gate } 621*0Sstevel@tonic-gate 622*0Sstevel@tonic-gate /* 623*0Sstevel@tonic-gate * Create a routing socket for sending RTM_ADD and RTM_DELETE messages and 624*0Sstevel@tonic-gate * initialize the routing socket message header and as much of the sockaddrs 625*0Sstevel@tonic-gate * as possible. 626*0Sstevel@tonic-gate */ 627*0Sstevel@tonic-gate void 628*0Sstevel@tonic-gate setup_rtsock(void) 629*0Sstevel@tonic-gate { 630*0Sstevel@tonic-gate char *cp; 631*0Sstevel@tonic-gate int off = 0; 632*0Sstevel@tonic-gate 633*0Sstevel@tonic-gate rtsock = socket(PF_ROUTE, SOCK_RAW, AF_INET6); 634*0Sstevel@tonic-gate if (rtsock < 0) { 635*0Sstevel@tonic-gate syslog(LOG_ERR, "setup_rtsock: socket: %m"); 636*0Sstevel@tonic-gate exit(EXIT_FAILURE); 637*0Sstevel@tonic-gate } 638*0Sstevel@tonic-gate 639*0Sstevel@tonic-gate /* We don't want to listen to our own messages */ 640*0Sstevel@tonic-gate if (setsockopt(rtsock, SOL_SOCKET, SO_USELOOPBACK, (char *)&off, 641*0Sstevel@tonic-gate sizeof (off)) < 0) { 642*0Sstevel@tonic-gate syslog(LOG_ERR, "setup_rtsock: setsockopt: SO_USELOOPBACK: %m"); 643*0Sstevel@tonic-gate exit(EXIT_FAILURE); 644*0Sstevel@tonic-gate } 645*0Sstevel@tonic-gate 646*0Sstevel@tonic-gate /* 647*0Sstevel@tonic-gate * Allocate storage for the routing socket message. 648*0Sstevel@tonic-gate */ 649*0Sstevel@tonic-gate rt_msg = (struct rt_msghdr *)malloc(RIPNG_RTM_MSGLEN); 650*0Sstevel@tonic-gate if (rt_msg == NULL) { 651*0Sstevel@tonic-gate syslog(LOG_ERR, "setup_rtsock: malloc: %m"); 652*0Sstevel@tonic-gate exit(EXIT_FAILURE); 653*0Sstevel@tonic-gate } 654*0Sstevel@tonic-gate 655*0Sstevel@tonic-gate /* 656*0Sstevel@tonic-gate * Initialize the routing socket message by zero-filling it and then 657*0Sstevel@tonic-gate * setting the fields where are constant through the lifetime of the 658*0Sstevel@tonic-gate * process. 659*0Sstevel@tonic-gate */ 660*0Sstevel@tonic-gate bzero(rt_msg, RIPNG_RTM_MSGLEN); 661*0Sstevel@tonic-gate rt_msg->rtm_msglen = RIPNG_RTM_MSGLEN; 662*0Sstevel@tonic-gate rt_msg->rtm_version = RTM_VERSION; 663*0Sstevel@tonic-gate rt_msg->rtm_addrs = RTA_DST | RTA_GATEWAY | RTA_NETMASK | RTA_IFP; 664*0Sstevel@tonic-gate rt_msg->rtm_pid = getpid(); 665*0Sstevel@tonic-gate if (rt_msg->rtm_pid < 0) { 666*0Sstevel@tonic-gate syslog(LOG_ERR, "setup_rtsock: getpid: %m"); 667*0Sstevel@tonic-gate exit(EXIT_FAILURE); 668*0Sstevel@tonic-gate } 669*0Sstevel@tonic-gate 670*0Sstevel@tonic-gate /* 671*0Sstevel@tonic-gate * Initialize the constant portion of the RTA_DST sockaddr. 672*0Sstevel@tonic-gate */ 673*0Sstevel@tonic-gate cp = (char *)rt_msg + sizeof (struct rt_msghdr); 674*0Sstevel@tonic-gate rta_dst = (struct sockaddr_in6 *)cp; 675*0Sstevel@tonic-gate rta_dst->sin6_family = AF_INET6; 676*0Sstevel@tonic-gate 677*0Sstevel@tonic-gate /* 678*0Sstevel@tonic-gate * Initialize the constant portion of the RTA_GATEWAY sockaddr. 679*0Sstevel@tonic-gate */ 680*0Sstevel@tonic-gate cp += sizeof (struct sockaddr_in6); 681*0Sstevel@tonic-gate rta_gateway = (struct sockaddr_in6 *)cp; 682*0Sstevel@tonic-gate rta_gateway->sin6_family = AF_INET6; 683*0Sstevel@tonic-gate 684*0Sstevel@tonic-gate /* 685*0Sstevel@tonic-gate * Initialize the constant portion of the RTA_NETMASK sockaddr. 686*0Sstevel@tonic-gate */ 687*0Sstevel@tonic-gate cp += sizeof (struct sockaddr_in6); 688*0Sstevel@tonic-gate rta_netmask = (struct sockaddr_in6 *)cp; 689*0Sstevel@tonic-gate rta_netmask->sin6_family = AF_INET6; 690*0Sstevel@tonic-gate 691*0Sstevel@tonic-gate /* 692*0Sstevel@tonic-gate * Initialize the constant portion of the RTA_IFP sockaddr. 693*0Sstevel@tonic-gate */ 694*0Sstevel@tonic-gate cp += sizeof (struct sockaddr_in6); 695*0Sstevel@tonic-gate rta_ifp = (struct sockaddr_dl *)cp; 696*0Sstevel@tonic-gate rta_ifp->sdl_family = AF_LINK; 697*0Sstevel@tonic-gate } 698