1 /* 2 * Copyright (c) 2004, 2005 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Jeffrey M. Hsu. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of The DragonFly Project nor the names of its 16 * contributors may be used to endorse or promote products derived 17 * from this software without specific, prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 22 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 23 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 27 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 28 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 29 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1988, 1991, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 * 61 * @(#)rtsock.c 8.7 (Berkeley) 10/12/95 62 * $FreeBSD: src/sys/net/rtsock.c,v 1.44.2.11 2002/12/04 14:05:41 ru Exp $ 63 */ 64 65 #include "opt_inet6.h" 66 67 #include <sys/param.h> 68 #include <sys/systm.h> 69 #include <sys/kernel.h> 70 #include <sys/sysctl.h> 71 #include <sys/proc.h> 72 #include <sys/caps.h> 73 #include <sys/malloc.h> 74 #include <sys/mbuf.h> 75 #include <sys/protosw.h> 76 #include <sys/socket.h> 77 #include <sys/socketvar.h> 78 #include <sys/domain.h> 79 #include <sys/jail.h> 80 81 #include <sys/thread2.h> 82 #include <sys/socketvar2.h> 83 84 #include <net/if.h> 85 #include <net/if_var.h> 86 #include <net/route.h> 87 #include <net/raw_cb.h> 88 #include <net/netmsg2.h> 89 #include <net/netisr2.h> 90 91 #ifdef INET6 92 #include <netinet/in_var.h> 93 #endif 94 95 /* sa_family is after sa_len, rest is data */ 96 #define _SA_MINSIZE (offsetof(struct sockaddr, sa_family) + \ 97 sizeof(((struct sockaddr *)0)->sa_family)) 98 99 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables"); 100 101 static struct route_cb { 102 int ip_count; 103 int ip6_count; 104 int any_count; 105 } route_cb; 106 107 static const struct sockaddr route_src = { 2, PF_ROUTE, }; 108 109 struct walkarg { 110 int w_tmemsize; 111 int w_op, w_arg; 112 void *w_tmem; 113 struct sysctl_req *w_req; 114 }; 115 116 #ifndef RTTABLE_DUMP_MSGCNT_MAX 117 /* Should be large enough for dupkeys */ 118 #define RTTABLE_DUMP_MSGCNT_MAX 64 119 #endif 120 121 struct rttable_walkarg { 122 int w_op; 123 int w_arg; 124 int w_bufsz; 125 void *w_buf; 126 127 int w_buflen; 128 129 const char *w_key; 130 const char *w_mask; 131 132 struct sockaddr_storage w_key0; 133 struct sockaddr_storage w_mask0; 134 }; 135 136 struct netmsg_rttable_walk { 137 struct netmsg_base base; 138 int af; 139 struct rttable_walkarg *w; 140 }; 141 142 struct routecb { 143 struct rawcb rocb_rcb; 144 unsigned int rocb_msgfilter; 145 char *rocb_missfilter; 146 size_t rocb_missfilterlen; 147 }; 148 #define sotoroutecb(so) ((struct routecb *)(so)->so_pcb) 149 150 static struct mbuf * 151 rt_msg_mbuf (int, struct rt_addrinfo *); 152 static void rt_msg_buffer (int, struct rt_addrinfo *, void *buf, int len); 153 static int rt_msgsize(int type, const struct rt_addrinfo *rtinfo); 154 static int rt_xaddrs (char *, char *, struct rt_addrinfo *); 155 static int sysctl_rttable(int af, struct sysctl_req *req, int op, int arg); 156 static int if_addrflags(const struct ifaddr *ifa); 157 static int sysctl_iflist (int af, struct walkarg *w); 158 static int route_output(struct mbuf *, struct socket *, ...); 159 static void rt_setmetrics (u_long, struct rt_metrics *, 160 struct rt_metrics *); 161 162 /* 163 * It really doesn't make any sense at all for this code to share much 164 * with raw_usrreq.c, since its functionality is so restricted. XXX 165 */ 166 static void 167 rts_abort(netmsg_t msg) 168 { 169 crit_enter(); 170 raw_usrreqs.pru_abort(msg); 171 /* msg invalid now */ 172 crit_exit(); 173 } 174 175 static int 176 rts_filter(struct mbuf *m, const struct sockproto *proto, 177 const struct rawcb *rp) 178 { 179 const struct routecb *rop = (const struct routecb *)rp; 180 const struct rt_msghdr *rtm; 181 182 KKASSERT(m != NULL); 183 KKASSERT(proto != NULL); 184 KKASSERT(rp != NULL); 185 186 /* Wrong family for this socket. */ 187 if (proto->sp_family != PF_ROUTE) 188 return ENOPROTOOPT; 189 190 /* If no filter set, just return. */ 191 if (rop->rocb_msgfilter == 0 && rop->rocb_missfilterlen == 0) 192 return 0; 193 194 /* Ensure we can access rtm_type */ 195 if (m->m_len < 196 offsetof(struct rt_msghdr, rtm_type) + sizeof(rtm->rtm_type)) 197 return EINVAL; 198 199 rtm = mtod(m, const struct rt_msghdr *); 200 /* If the rtm type is filtered out, return a positive. */ 201 if (rop->rocb_msgfilter != 0 && 202 !(rop->rocb_msgfilter & ROUTE_FILTER(rtm->rtm_type))) 203 return EEXIST; 204 205 if (rop->rocb_missfilterlen != 0 && rtm->rtm_type == RTM_MISS) { 206 CTASSERT(RTAX_DST == 0); 207 struct sockaddr *sa; 208 struct sockaddr_storage ss; 209 struct sockaddr *dst = (struct sockaddr *)&ss; 210 char *cp = rop->rocb_missfilter; 211 char *ep = cp + rop->rocb_missfilterlen; 212 213 /* Ensure we can access sa_len */ 214 if (m->m_pkthdr.len < sizeof(*rtm) + _SA_MINSIZE) 215 return EINVAL; 216 m_copydata(m, sizeof(*rtm) + offsetof(struct sockaddr, sa_len), 217 sizeof(ss.ss_len), (caddr_t)&ss); 218 if (ss.ss_len < _SA_MINSIZE || 219 ss.ss_len > sizeof(ss) || 220 m->m_pkthdr.len < sizeof(*rtm) + ss.ss_len) 221 return EINVAL; 222 /* Copy out the destination sockaddr */ 223 m_copydata(m, sizeof(*rtm), ss.ss_len, (caddr_t)&ss); 224 225 /* Find a matching sockaddr in the filter */ 226 while (cp < ep) { 227 sa = (struct sockaddr *)cp; 228 if (sa->sa_len == dst->sa_len && 229 memcmp(sa, dst, sa->sa_len) == 0) 230 break; 231 cp += RT_ROUNDUP(sa->sa_len); 232 } 233 if (cp == ep) 234 return EEXIST; 235 } 236 237 /* Passed the filter. */ 238 return 0; 239 } 240 241 242 /* pru_accept is EOPNOTSUPP */ 243 244 static void 245 rts_attach(netmsg_t msg) 246 { 247 struct socket *so = msg->base.nm_so; 248 struct pru_attach_info *ai = msg->attach.nm_ai; 249 struct rawcb *rp; 250 struct routecb *rop; 251 int proto = msg->attach.nm_proto; 252 int error; 253 254 crit_enter(); 255 if (sotorawcb(so) != NULL) { 256 error = EISCONN; 257 goto done; 258 } 259 260 rop = kmalloc(sizeof *rop, M_PCB, M_WAITOK | M_ZERO); 261 rp = &rop->rocb_rcb; 262 263 /* 264 * The critical section is necessary to block protocols from sending 265 * error notifications (like RTM_REDIRECT or RTM_LOSING) while 266 * this PCB is extant but incompletely initialized. 267 * Probably we should try to do more of this work beforehand and 268 * eliminate the critical section. 269 */ 270 so->so_pcb = rp; 271 soreference(so); /* so_pcb assignment */ 272 error = raw_attach(so, proto, ai->sb_rlimit); 273 rp = sotorawcb(so); 274 if (error) { 275 kfree(rop, M_PCB); 276 goto done; 277 } 278 switch(rp->rcb_proto.sp_protocol) { 279 case AF_INET: 280 route_cb.ip_count++; 281 break; 282 case AF_INET6: 283 route_cb.ip6_count++; 284 break; 285 } 286 rp->rcb_faddr = &route_src; 287 rp->rcb_filter = rts_filter; 288 route_cb.any_count++; 289 soisconnected(so); 290 so->so_options |= SO_USELOOPBACK; 291 error = 0; 292 done: 293 crit_exit(); 294 lwkt_replymsg(&msg->lmsg, error); 295 } 296 297 static void 298 rts_bind(netmsg_t msg) 299 { 300 crit_enter(); 301 raw_usrreqs.pru_bind(msg); /* xxx just EINVAL */ 302 /* msg invalid now */ 303 crit_exit(); 304 } 305 306 static void 307 rts_connect(netmsg_t msg) 308 { 309 crit_enter(); 310 raw_usrreqs.pru_connect(msg); /* XXX just EINVAL */ 311 /* msg invalid now */ 312 crit_exit(); 313 } 314 315 /* pru_connect2 is EOPNOTSUPP */ 316 /* pru_control is EOPNOTSUPP */ 317 318 static void 319 rts_detach(netmsg_t msg) 320 { 321 struct socket *so = msg->base.nm_so; 322 struct rawcb *rp = sotorawcb(so); 323 struct routecb *rop = (struct routecb *)rp; 324 325 crit_enter(); 326 if (rop->rocb_missfilterlen != 0) 327 kfree(rop->rocb_missfilter, M_PCB); 328 if (rp != NULL) { 329 switch(rp->rcb_proto.sp_protocol) { 330 case AF_INET: 331 route_cb.ip_count--; 332 break; 333 case AF_INET6: 334 route_cb.ip6_count--; 335 break; 336 } 337 route_cb.any_count--; 338 } 339 raw_usrreqs.pru_detach(msg); 340 /* msg invalid now */ 341 crit_exit(); 342 } 343 344 static void 345 rts_disconnect(netmsg_t msg) 346 { 347 crit_enter(); 348 raw_usrreqs.pru_disconnect(msg); 349 /* msg invalid now */ 350 crit_exit(); 351 } 352 353 /* pru_listen is EOPNOTSUPP */ 354 355 static void 356 rts_peeraddr(netmsg_t msg) 357 { 358 crit_enter(); 359 raw_usrreqs.pru_peeraddr(msg); 360 /* msg invalid now */ 361 crit_exit(); 362 } 363 364 /* pru_rcvd is EOPNOTSUPP */ 365 /* pru_rcvoob is EOPNOTSUPP */ 366 367 static void 368 rts_send(netmsg_t msg) 369 { 370 crit_enter(); 371 raw_usrreqs.pru_send(msg); 372 /* msg invalid now */ 373 crit_exit(); 374 } 375 376 /* pru_sense is null */ 377 378 static void 379 rts_shutdown(netmsg_t msg) 380 { 381 crit_enter(); 382 raw_usrreqs.pru_shutdown(msg); 383 /* msg invalid now */ 384 crit_exit(); 385 } 386 387 static void 388 rts_sockaddr(netmsg_t msg) 389 { 390 crit_enter(); 391 raw_usrreqs.pru_sockaddr(msg); 392 /* msg invalid now */ 393 crit_exit(); 394 } 395 396 static struct pr_usrreqs route_usrreqs = { 397 .pru_abort = rts_abort, 398 .pru_accept = pr_generic_notsupp, 399 .pru_attach = rts_attach, 400 .pru_bind = rts_bind, 401 .pru_connect = rts_connect, 402 .pru_connect2 = pr_generic_notsupp, 403 .pru_control = pr_generic_notsupp, 404 .pru_detach = rts_detach, 405 .pru_disconnect = rts_disconnect, 406 .pru_listen = pr_generic_notsupp, 407 .pru_peeraddr = rts_peeraddr, 408 .pru_rcvd = pr_generic_notsupp, 409 .pru_rcvoob = pr_generic_notsupp, 410 .pru_send = rts_send, 411 .pru_sense = pru_sense_null, 412 .pru_shutdown = rts_shutdown, 413 .pru_sockaddr = rts_sockaddr, 414 .pru_sosend = sosend, 415 .pru_soreceive = soreceive 416 }; 417 418 static __inline sa_family_t 419 familyof(struct sockaddr *sa) 420 { 421 return (sa != NULL ? sa->sa_family : 0); 422 } 423 424 /* 425 * Routing socket input function. The packet must be serialized onto cpu 0. 426 * We use the cpu0_soport() netisr processing loop to handle it. 427 * 428 * This looks messy but it means that anyone, including interrupt code, 429 * can send a message to the routing socket. 430 */ 431 static void 432 rts_input_handler(netmsg_t msg) 433 { 434 static const struct sockaddr route_dst = { 2, PF_ROUTE, }; 435 struct sockproto route_proto; 436 struct netmsg_packet *pmsg = &msg->packet; 437 struct mbuf *m; 438 sa_family_t family; 439 struct rawcb *skip; 440 441 family = pmsg->base.lmsg.u.ms_result; 442 route_proto.sp_family = PF_ROUTE; 443 route_proto.sp_protocol = family; 444 445 m = pmsg->nm_packet; 446 M_ASSERTPKTHDR(m); 447 448 skip = m->m_pkthdr.header; 449 m->m_pkthdr.header = NULL; 450 451 raw_input(m, &route_proto, &route_src, &route_dst, skip); 452 } 453 454 static void 455 rts_input_skip(struct mbuf *m, sa_family_t family, struct rawcb *skip) 456 { 457 struct netmsg_packet *pmsg; 458 lwkt_port_t port; 459 460 M_ASSERTPKTHDR(m); 461 462 port = netisr_cpuport(0); /* XXX same as for routing socket */ 463 pmsg = &m->m_hdr.mh_netmsg; 464 netmsg_init(&pmsg->base, NULL, &netisr_apanic_rport, 465 0, rts_input_handler); 466 pmsg->nm_packet = m; 467 pmsg->base.lmsg.u.ms_result = family; 468 m->m_pkthdr.header = skip; /* XXX steal field in pkthdr */ 469 lwkt_sendmsg(port, &pmsg->base.lmsg); 470 } 471 472 static __inline void 473 rts_input(struct mbuf *m, sa_family_t family) 474 { 475 rts_input_skip(m, family, NULL); 476 } 477 478 static void 479 route_ctloutput(netmsg_t msg) 480 { 481 struct socket *so = msg->ctloutput.base.nm_so; 482 struct sockopt *sopt = msg->ctloutput.nm_sopt; 483 struct routecb *rop = sotoroutecb(so); 484 int error; 485 unsigned int msgfilter; 486 unsigned char *cp, *ep; 487 size_t len; 488 struct sockaddr *sa; 489 490 if (sopt->sopt_level != AF_ROUTE) { 491 error = EINVAL; 492 goto out; 493 } 494 495 error = 0; 496 497 switch (sopt->sopt_dir) { 498 case SOPT_SET: 499 switch (sopt->sopt_name) { 500 case ROUTE_MSGFILTER: 501 error = soopt_to_kbuf(sopt, &msgfilter, 502 sizeof(msgfilter), sizeof(msgfilter)); 503 if (error == 0) 504 rop->rocb_msgfilter = msgfilter; 505 break; 506 case RO_MISSFILTER: 507 /* Validate the data */ 508 len = 0; 509 cp = sopt->sopt_val; 510 ep = cp + sopt->sopt_valsize; 511 while (cp < ep) { 512 if (ep - cp < 513 offsetof(struct sockaddr, sa_len) + 514 sizeof(sa->sa_len)) 515 break; 516 if (++len > RO_FILTSA_MAX) { 517 error = ENOBUFS; 518 break; 519 } 520 sa = (struct sockaddr *)cp; 521 if (sa->sa_len < _SA_MINSIZE || 522 sa->sa_len > sizeof(struct sockaddr_storage)) 523 break; 524 cp += RT_ROUNDUP(sa->sa_len); 525 } 526 if (cp != ep) { 527 if (error == 0) 528 error = EINVAL; 529 break; 530 } 531 if (rop->rocb_missfilterlen != 0) 532 kfree(rop->rocb_missfilter, M_PCB); 533 if (sopt->sopt_valsize != 0) { 534 rop->rocb_missfilter = 535 kmalloc(sopt->sopt_valsize, 536 M_PCB, M_WAITOK | M_NULLOK); 537 if (rop->rocb_missfilter == NULL) { 538 rop->rocb_missfilterlen = 0; 539 error = ENOBUFS; 540 break; 541 } 542 } else 543 rop->rocb_missfilter = NULL; 544 rop->rocb_missfilterlen = sopt->sopt_valsize; 545 if (rop->rocb_missfilterlen != 0) 546 memcpy(rop->rocb_missfilter, sopt->sopt_val, 547 rop->rocb_missfilterlen); 548 break; 549 default: 550 error = ENOPROTOOPT; 551 break; 552 } 553 break; 554 case SOPT_GET: 555 switch (sopt->sopt_name) { 556 case ROUTE_MSGFILTER: 557 msgfilter = rop->rocb_msgfilter; 558 soopt_from_kbuf(sopt, &msgfilter, sizeof(msgfilter)); 559 break; 560 case RO_MISSFILTER: 561 soopt_from_kbuf(sopt, rop->rocb_missfilter, 562 rop->rocb_missfilterlen); 563 break; 564 default: 565 error = ENOPROTOOPT; 566 break; 567 } 568 } 569 out: 570 lwkt_replymsg(&msg->ctloutput.base.lmsg, error); 571 } 572 573 574 575 static void * 576 reallocbuf_nofree(void *ptr, size_t len, size_t olen) 577 { 578 void *newptr; 579 580 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 581 if (newptr == NULL) 582 return NULL; 583 bcopy(ptr, newptr, olen); 584 if (olen < len) 585 bzero((char *)newptr + olen, len - olen); 586 587 return (newptr); 588 } 589 590 /* 591 * Internal helper routine for route_output(). 592 */ 593 static int 594 _fillrtmsg(struct rt_msghdr **prtm, struct rtentry *rt, 595 struct rt_addrinfo *rtinfo) 596 { 597 int msglen; 598 struct rt_msghdr *rtm = *prtm; 599 600 /* Fill in rt_addrinfo for call to rt_msg_buffer(). */ 601 rtinfo->rti_dst = rt_key(rt); 602 rtinfo->rti_gateway = rt->rt_gateway; 603 rtinfo->rti_netmask = rt_mask(rt); /* might be NULL */ 604 rtinfo->rti_genmask = rt->rt_genmask; /* might be NULL */ 605 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 606 if (rt->rt_ifp != NULL) { 607 rtinfo->rti_ifpaddr = 608 TAILQ_FIRST(&rt->rt_ifp->if_addrheads[mycpuid]) 609 ->ifa->ifa_addr; 610 rtinfo->rti_ifaaddr = rt->rt_ifa->ifa_addr; 611 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 612 rtinfo->rti_bcastaddr = rt->rt_ifa->ifa_dstaddr; 613 rtm->rtm_index = rt->rt_ifp->if_index; 614 } else { 615 rtinfo->rti_ifpaddr = NULL; 616 rtinfo->rti_ifaaddr = NULL; 617 } 618 } else if (rt->rt_ifp != NULL) { 619 rtm->rtm_index = rt->rt_ifp->if_index; 620 } 621 622 msglen = rt_msgsize(rtm->rtm_type, rtinfo); 623 if (rtm->rtm_msglen < msglen) { 624 /* NOTE: Caller will free the old rtm accordingly */ 625 rtm = reallocbuf_nofree(rtm, msglen, rtm->rtm_msglen); 626 if (rtm == NULL) 627 return (ENOBUFS); 628 *prtm = rtm; 629 } 630 rt_msg_buffer(rtm->rtm_type, rtinfo, rtm, msglen); 631 632 rtm->rtm_flags = rt->rt_flags; 633 rtm->rtm_rmx = rt->rt_rmx; 634 rtm->rtm_addrs = rtinfo->rti_addrs; 635 636 return (0); 637 } 638 639 struct rtm_arg { 640 struct rt_msghdr *bak_rtm; 641 struct rt_msghdr *new_rtm; 642 }; 643 644 static int 645 fillrtmsg(struct rtm_arg *arg, struct rtentry *rt, 646 struct rt_addrinfo *rtinfo) 647 { 648 struct rt_msghdr *rtm = arg->new_rtm; 649 int error; 650 651 error = _fillrtmsg(&rtm, rt, rtinfo); 652 if (!error) { 653 if (arg->new_rtm != rtm) { 654 /* 655 * _fillrtmsg() just allocated a new rtm; 656 * if the previously allocated rtm is not 657 * the backing rtm, it should be freed. 658 */ 659 if (arg->new_rtm != arg->bak_rtm) 660 kfree(arg->new_rtm, M_RTABLE); 661 arg->new_rtm = rtm; 662 } 663 } 664 return error; 665 } 666 667 static void route_output_add_callback(int, int, struct rt_addrinfo *, 668 struct rtentry *, void *); 669 static void route_output_delete_callback(int, int, struct rt_addrinfo *, 670 struct rtentry *, void *); 671 static int route_output_get_callback(int, struct rt_addrinfo *, 672 struct rtentry *, void *, int); 673 static int route_output_change_callback(int, struct rt_addrinfo *, 674 struct rtentry *, void *, int); 675 static int route_output_lock_callback(int, struct rt_addrinfo *, 676 struct rtentry *, void *, int); 677 678 /*ARGSUSED*/ 679 static int 680 route_output(struct mbuf *m, struct socket *so, ...) 681 { 682 struct rtm_arg arg; 683 struct rt_msghdr *rtm = NULL; 684 struct rawcb *rp = NULL; 685 struct pr_output_info *oi; 686 struct rt_addrinfo rtinfo; 687 sa_family_t family; 688 int len, error = 0; 689 __va_list ap; 690 691 M_ASSERTPKTHDR(m); 692 693 __va_start(ap, so); 694 oi = __va_arg(ap, struct pr_output_info *); 695 __va_end(ap); 696 697 family = familyof(NULL); 698 699 #define gotoerr(e) { error = e; goto flush;} 700 701 if (m == NULL || 702 (m->m_len < sizeof(long) && 703 (m = m_pullup(m, sizeof(long))) == NULL)) 704 return (ENOBUFS); 705 len = m->m_pkthdr.len; 706 if (len < sizeof(struct rt_msghdr) || 707 len != mtod(m, struct rt_msghdr *)->rtm_msglen) 708 gotoerr(EINVAL); 709 710 rtm = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 711 if (rtm == NULL) 712 gotoerr(ENOBUFS); 713 714 m_copydata(m, 0, len, (caddr_t)rtm); 715 if (rtm->rtm_version != RTM_VERSION) 716 gotoerr(EPROTONOSUPPORT); 717 718 rtm->rtm_pid = oi->p_pid; 719 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 720 rtinfo.rti_addrs = rtm->rtm_addrs; 721 if (rt_xaddrs((char *)(rtm + 1), (char *)rtm + len, &rtinfo) != 0) 722 gotoerr(EINVAL); 723 724 rtinfo.rti_flags = rtm->rtm_flags; 725 if (rtinfo.rti_dst == NULL || rtinfo.rti_dst->sa_family >= AF_MAX || 726 (rtinfo.rti_gateway && rtinfo.rti_gateway->sa_family >= AF_MAX)) 727 gotoerr(EINVAL); 728 729 family = familyof(rtinfo.rti_dst); 730 731 /* 732 * Verify that the caller has the appropriate privilege; RTM_GET 733 * is the only operation the non-superuser is allowed. 734 */ 735 if (rtm->rtm_type != RTM_GET && 736 caps_priv_check(so->so_cred, SYSCAP_RESTRICTEDROOT) != 0) 737 { 738 gotoerr(EPERM); 739 } 740 741 if (rtinfo.rti_genmask != NULL) { 742 error = rtmask_add_global(rtinfo.rti_genmask, 743 rtm->rtm_type != RTM_GET ? 744 RTREQ_PRIO_HIGH : RTREQ_PRIO_NORM); 745 if (error) 746 goto flush; 747 } 748 749 switch (rtm->rtm_type) { 750 case RTM_ADD: 751 if (rtinfo.rti_gateway == NULL) { 752 error = EINVAL; 753 } else { 754 error = rtrequest1_global(RTM_ADD, &rtinfo, 755 route_output_add_callback, rtm, RTREQ_PRIO_HIGH); 756 } 757 break; 758 case RTM_DELETE: 759 /* 760 * Backing rtm (bak_rtm) could _not_ be freed during 761 * rtrequest1_global or rtsearch_global, even if the 762 * callback reallocates the rtm due to its size changes, 763 * since rtinfo points to the backing rtm's memory area. 764 * After rtrequest1_global or rtsearch_global returns, 765 * it is safe to free the backing rtm, since rtinfo will 766 * not be used anymore. 767 * 768 * new_rtm will be used to save the new rtm allocated 769 * by rtrequest1_global or rtsearch_global. 770 */ 771 arg.bak_rtm = rtm; 772 arg.new_rtm = rtm; 773 error = rtrequest1_global(RTM_DELETE, &rtinfo, 774 route_output_delete_callback, &arg, RTREQ_PRIO_HIGH); 775 rtm = arg.new_rtm; 776 if (rtm != arg.bak_rtm) 777 kfree(arg.bak_rtm, M_RTABLE); 778 break; 779 case RTM_GET: 780 /* See the comment in RTM_DELETE */ 781 arg.bak_rtm = rtm; 782 arg.new_rtm = rtm; 783 error = rtsearch_global(RTM_GET, &rtinfo, 784 route_output_get_callback, &arg, RTS_NOEXACTMATCH, 785 RTREQ_PRIO_NORM); 786 rtm = arg.new_rtm; 787 if (rtm != arg.bak_rtm) 788 kfree(arg.bak_rtm, M_RTABLE); 789 break; 790 case RTM_CHANGE: 791 error = rtsearch_global(RTM_CHANGE, &rtinfo, 792 route_output_change_callback, rtm, RTS_EXACTMATCH, 793 RTREQ_PRIO_HIGH); 794 break; 795 case RTM_LOCK: 796 error = rtsearch_global(RTM_LOCK, &rtinfo, 797 route_output_lock_callback, rtm, RTS_EXACTMATCH, 798 RTREQ_PRIO_HIGH); 799 break; 800 default: 801 error = EOPNOTSUPP; 802 break; 803 } 804 flush: 805 if (rtm != NULL) { 806 if (error != 0) 807 rtm->rtm_errno = error; 808 else 809 rtm->rtm_flags |= RTF_DONE; 810 } 811 812 /* 813 * Check to see if we don't want our own messages. 814 */ 815 if (!(so->so_options & SO_USELOOPBACK)) { 816 if (route_cb.any_count <= 1) { 817 if (rtm != NULL) 818 kfree(rtm, M_RTABLE); 819 m_freem(m); 820 return (error); 821 } 822 /* There is another listener, so construct message */ 823 rp = sotorawcb(so); 824 } 825 if (rtm != NULL) { 826 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 827 if (m->m_pkthdr.len < rtm->rtm_msglen) { 828 m_freem(m); 829 m = NULL; 830 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 831 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 832 kfree(rtm, M_RTABLE); 833 } 834 if (m != NULL) 835 rts_input_skip(m, family, rp); 836 return (error); 837 } 838 839 static void 840 route_output_add_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 841 struct rtentry *rt, void *arg) 842 { 843 struct rt_msghdr *rtm = arg; 844 845 if (error == 0 && rt != NULL) { 846 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 847 &rt->rt_rmx); 848 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 849 rt->rt_rmx.rmx_locks |= 850 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 851 if (rtinfo->rti_genmask != NULL) { 852 rt->rt_genmask = rtmask_purelookup(rtinfo->rti_genmask); 853 if (rt->rt_genmask == NULL) { 854 /* 855 * This should not happen, since we 856 * have already installed genmask 857 * on each CPU before we reach here. 858 */ 859 panic("genmask is gone!?"); 860 } 861 } else { 862 rt->rt_genmask = NULL; 863 } 864 rtm->rtm_index = rt->rt_ifp->if_index; 865 } 866 } 867 868 static void 869 route_output_delete_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 870 struct rtentry *rt, void *arg) 871 { 872 if (error == 0 && rt) { 873 ++rt->rt_refcnt; 874 if (fillrtmsg(arg, rt, rtinfo) != 0) { 875 error = ENOBUFS; 876 /* XXX no way to return the error */ 877 } 878 --rt->rt_refcnt; 879 } 880 if (rt && rt->rt_refcnt == 0) { 881 ++rt->rt_refcnt; 882 rtfree(rt); 883 } 884 } 885 886 static int 887 route_output_get_callback(int cmd, struct rt_addrinfo *rtinfo, 888 struct rtentry *rt, void *arg, int found_cnt) 889 { 890 int error, found = 0; 891 892 if (((rtinfo->rti_flags ^ rt->rt_flags) & RTF_HOST) == 0) 893 found = 1; 894 895 error = fillrtmsg(arg, rt, rtinfo); 896 if (!error && found) { 897 /* Got the exact match, we could return now! */ 898 error = EJUSTRETURN; 899 } 900 return error; 901 } 902 903 static int 904 route_output_change_callback(int cmd, struct rt_addrinfo *rtinfo, 905 struct rtentry *rt, void *arg, int found_cnt) 906 { 907 struct rt_msghdr *rtm = arg; 908 struct ifaddr *ifa; 909 int error = 0; 910 911 /* 912 * new gateway could require new ifaddr, ifp; 913 * flags may also be different; ifp may be specified 914 * by ll sockaddr when protocol address is ambiguous 915 */ 916 if (((rt->rt_flags & RTF_GATEWAY) && rtinfo->rti_gateway != NULL) || 917 rtinfo->rti_ifpaddr != NULL || 918 (rtinfo->rti_ifaaddr != NULL && 919 !sa_equal(rtinfo->rti_ifaaddr, rt->rt_ifa->ifa_addr))) { 920 error = rt_getifa(rtinfo); 921 if (error != 0) 922 goto done; 923 } 924 if (rtinfo->rti_gateway != NULL) { 925 /* 926 * We only need to generate rtmsg upon the 927 * first route to be changed. 928 */ 929 error = rt_setgate(rt, rt_key(rt), rtinfo->rti_gateway); 930 if (error != 0) 931 goto done; 932 } 933 if ((ifa = rtinfo->rti_ifa) != NULL) { 934 struct ifaddr *oifa = rt->rt_ifa; 935 936 if (oifa != ifa) { 937 if (oifa && oifa->ifa_rtrequest) 938 oifa->ifa_rtrequest(RTM_DELETE, rt); 939 IFAFREE(rt->rt_ifa); 940 IFAREF(ifa); 941 rt->rt_ifa = ifa; 942 rt->rt_ifp = rtinfo->rti_ifp; 943 } 944 } 945 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, &rt->rt_rmx); 946 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 947 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt); 948 if (rtinfo->rti_genmask != NULL) { 949 rt->rt_genmask = rtmask_purelookup(rtinfo->rti_genmask); 950 if (rt->rt_genmask == NULL) { 951 /* 952 * This should not happen, since we 953 * have already installed genmask 954 * on each CPU before we reach here. 955 */ 956 panic("genmask is gone!?"); 957 } 958 } 959 rtm->rtm_index = rt->rt_ifp->if_index; 960 if (found_cnt == 1) 961 rt_rtmsg(RTM_CHANGE, rt, rt->rt_ifp, 0); 962 done: 963 return error; 964 } 965 966 static int 967 route_output_lock_callback(int cmd, struct rt_addrinfo *rtinfo, 968 struct rtentry *rt, void *arg, 969 int found_cnt __unused) 970 { 971 struct rt_msghdr *rtm = arg; 972 973 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 974 rt->rt_rmx.rmx_locks |= 975 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 976 return 0; 977 } 978 979 static void 980 rt_setmetrics(u_long which, struct rt_metrics *in, struct rt_metrics *out) 981 { 982 #define setmetric(flag, elt) if (which & (flag)) out->elt = in->elt; 983 setmetric(RTV_RPIPE, rmx_recvpipe); 984 setmetric(RTV_SPIPE, rmx_sendpipe); 985 setmetric(RTV_SSTHRESH, rmx_ssthresh); 986 setmetric(RTV_RTT, rmx_rtt); 987 setmetric(RTV_RTTVAR, rmx_rttvar); 988 setmetric(RTV_HOPCOUNT, rmx_hopcount); 989 setmetric(RTV_MTU, rmx_mtu); 990 setmetric(RTV_EXPIRE, rmx_expire); 991 setmetric(RTV_MSL, rmx_msl); 992 setmetric(RTV_IWMAXSEGS, rmx_iwmaxsegs); 993 setmetric(RTV_IWCAPSEGS, rmx_iwcapsegs); 994 #undef setmetric 995 } 996 997 /* 998 * Extract the addresses of the passed sockaddrs. 999 * Do a little sanity checking so as to avoid bad memory references. 1000 * This data is derived straight from userland. 1001 */ 1002 static int 1003 rt_xaddrs(char *cp, char *cplim, struct rt_addrinfo *rtinfo) 1004 { 1005 struct sockaddr *sa; 1006 int i; 1007 1008 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 1009 if ((rtinfo->rti_addrs & (1 << i)) == 0) 1010 continue; 1011 sa = (struct sockaddr *)cp; 1012 /* 1013 * It won't fit. 1014 */ 1015 if ((cp + sa->sa_len) > cplim) { 1016 return (EINVAL); 1017 } 1018 1019 /* 1020 * There are no more... Quit now. 1021 * If there are more bits, they are in error. 1022 * I've seen this. route(1) can evidently generate these. 1023 * This causes kernel to core dump. 1024 * For compatibility, if we see this, point to a safe address. 1025 */ 1026 if (sa->sa_len == 0) { 1027 static struct sockaddr sa_zero = { 1028 sizeof sa_zero, AF_INET, 1029 }; 1030 1031 rtinfo->rti_info[i] = &sa_zero; 1032 kprintf("rtsock: received more addr bits than sockaddrs.\n"); 1033 return (0); /* should be EINVAL but for compat */ 1034 } 1035 1036 /* Accept the sockaddr. */ 1037 rtinfo->rti_info[i] = sa; 1038 cp += RT_ROUNDUP(sa->sa_len); 1039 } 1040 return (0); 1041 } 1042 1043 static int 1044 rt_msghdrsize(int type) 1045 { 1046 switch (type) { 1047 case RTM_DELADDR: 1048 case RTM_NEWADDR: 1049 return sizeof(struct ifa_msghdr); 1050 case RTM_DELMADDR: 1051 case RTM_NEWMADDR: 1052 return sizeof(struct ifma_msghdr); 1053 case RTM_IFINFO: 1054 return sizeof(struct if_msghdr); 1055 case RTM_IFANNOUNCE: 1056 case RTM_IEEE80211: 1057 return sizeof(struct if_announcemsghdr); 1058 default: 1059 return sizeof(struct rt_msghdr); 1060 } 1061 } 1062 1063 static int 1064 rt_msgsize(int type, const struct rt_addrinfo *rtinfo) 1065 { 1066 int len, i; 1067 1068 len = rt_msghdrsize(type); 1069 for (i = 0; i < RTAX_MAX; i++) { 1070 if (rtinfo->rti_info[i] != NULL) 1071 len += RT_ROUNDUP(rtinfo->rti_info[i]->sa_len); 1072 } 1073 len = ALIGN(len); 1074 return len; 1075 } 1076 1077 /* 1078 * Build a routing message in a buffer. 1079 * Copy the addresses in the rtinfo->rti_info[] sockaddr array 1080 * to the end of the buffer after the message header. 1081 * 1082 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[]. 1083 * This side-effect can be avoided if we reorder the addrs bitmask field in all 1084 * the route messages to line up so we can set it here instead of back in the 1085 * calling routine. 1086 * 1087 * NOTE! The buffer may already contain a partially filled-out rtm via 1088 * _fillrtmsg(). 1089 */ 1090 static void 1091 rt_msg_buffer(int type, struct rt_addrinfo *rtinfo, void *buf, int msglen) 1092 { 1093 struct rt_msghdr *rtm; 1094 char *cp; 1095 int dlen, i; 1096 1097 rtm = (struct rt_msghdr *) buf; 1098 rtm->rtm_version = RTM_VERSION; 1099 rtm->rtm_type = type; 1100 rtm->rtm_msglen = msglen; 1101 1102 cp = (char *)buf + rt_msghdrsize(type); 1103 rtinfo->rti_addrs = 0; 1104 for (i = 0; i < RTAX_MAX; i++) { 1105 struct sockaddr *sa; 1106 1107 if ((sa = rtinfo->rti_info[i]) == NULL) 1108 continue; 1109 rtinfo->rti_addrs |= (1 << i); 1110 dlen = RT_ROUNDUP(sa->sa_len); 1111 bcopy(sa, cp, dlen); 1112 cp += dlen; 1113 } 1114 } 1115 1116 /* 1117 * Build a routing message in a mbuf chain. 1118 * Copy the addresses in the rtinfo->rti_info[] sockaddr array 1119 * to the end of the mbuf after the message header. 1120 * 1121 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[]. 1122 * This side-effect can be avoided if we reorder the addrs bitmask field in all 1123 * the route messages to line up so we can set it here instead of back in the 1124 * calling routine. 1125 */ 1126 static struct mbuf * 1127 rt_msg_mbuf(int type, struct rt_addrinfo *rtinfo) 1128 { 1129 struct mbuf *m; 1130 struct rt_msghdr *rtm; 1131 int hlen, len; 1132 int i; 1133 1134 hlen = rt_msghdrsize(type); 1135 KASSERT(hlen <= MCLBYTES, ("rt_msg_mbuf: hlen %d doesn't fit", hlen)); 1136 1137 m = m_getl(hlen, M_NOWAIT, MT_DATA, M_PKTHDR, NULL); 1138 if (m == NULL) 1139 return (NULL); 1140 mbuftrackid(m, 32); 1141 m->m_pkthdr.len = m->m_len = hlen; 1142 m->m_pkthdr.rcvif = NULL; 1143 rtinfo->rti_addrs = 0; 1144 len = hlen; 1145 for (i = 0; i < RTAX_MAX; i++) { 1146 struct sockaddr *sa; 1147 int dlen; 1148 1149 if ((sa = rtinfo->rti_info[i]) == NULL) 1150 continue; 1151 rtinfo->rti_addrs |= (1 << i); 1152 dlen = RT_ROUNDUP(sa->sa_len); 1153 m_copyback(m, len, dlen, (caddr_t)sa); /* can grow mbuf chain */ 1154 len += dlen; 1155 } 1156 if (m->m_pkthdr.len != len) { /* one of the m_copyback() calls failed */ 1157 m_freem(m); 1158 return (NULL); 1159 } 1160 rtm = mtod(m, struct rt_msghdr *); 1161 bzero(rtm, hlen); 1162 rtm->rtm_msglen = len; 1163 rtm->rtm_version = RTM_VERSION; 1164 rtm->rtm_type = type; 1165 return (m); 1166 } 1167 1168 /* 1169 * This routine is called to generate a message from the routing 1170 * socket indicating that a redirect has occurred, a routing lookup 1171 * has failed, or that a protocol has detected timeouts to a particular 1172 * destination. 1173 */ 1174 void 1175 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error) 1176 { 1177 struct sockaddr *dst = rtinfo->rti_info[RTAX_DST]; 1178 struct rt_msghdr *rtm; 1179 struct mbuf *m; 1180 1181 if (route_cb.any_count == 0) 1182 return; 1183 m = rt_msg_mbuf(type, rtinfo); 1184 if (m == NULL) 1185 return; 1186 rtm = mtod(m, struct rt_msghdr *); 1187 rtm->rtm_flags = RTF_DONE | flags; 1188 rtm->rtm_errno = error; 1189 rtm->rtm_addrs = rtinfo->rti_addrs; 1190 rts_input(m, familyof(dst)); 1191 } 1192 1193 void 1194 rt_dstmsg(int type, struct sockaddr *dst, int error) 1195 { 1196 struct rt_msghdr *rtm; 1197 struct rt_addrinfo addrs; 1198 struct mbuf *m; 1199 1200 if (route_cb.any_count == 0) 1201 return; 1202 bzero(&addrs, sizeof(struct rt_addrinfo)); 1203 addrs.rti_info[RTAX_DST] = dst; 1204 m = rt_msg_mbuf(type, &addrs); 1205 if (m == NULL) 1206 return; 1207 rtm = mtod(m, struct rt_msghdr *); 1208 rtm->rtm_flags = RTF_DONE; 1209 rtm->rtm_errno = error; 1210 rtm->rtm_addrs = addrs.rti_addrs; 1211 rts_input(m, familyof(dst)); 1212 } 1213 1214 /* 1215 * This routine is called to generate a message from the routing 1216 * socket indicating that the status of a network interface has changed. 1217 */ 1218 void 1219 rt_ifmsg(struct ifnet *ifp) 1220 { 1221 struct if_msghdr *ifm; 1222 struct mbuf *m; 1223 struct rt_addrinfo rtinfo; 1224 1225 if (route_cb.any_count == 0) 1226 return; 1227 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1228 m = rt_msg_mbuf(RTM_IFINFO, &rtinfo); 1229 if (m == NULL) 1230 return; 1231 ifm = mtod(m, struct if_msghdr *); 1232 ifm->ifm_index = ifp->if_index; 1233 ifm->ifm_flags = ifp->if_flags; 1234 ifm->ifm_data = ifp->if_data; 1235 ifm->ifm_addrs = 0; 1236 rts_input(m, 0); 1237 } 1238 1239 static void 1240 rt_ifamsg(int cmd, struct ifaddr *ifa) 1241 { 1242 struct ifa_msghdr *ifam; 1243 struct rt_addrinfo rtinfo; 1244 struct mbuf *m; 1245 struct ifnet *ifp = ifa->ifa_ifp; 1246 1247 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1248 rtinfo.rti_ifaaddr = ifa->ifa_addr; 1249 rtinfo.rti_ifpaddr = 1250 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr; 1251 rtinfo.rti_netmask = ifa->ifa_netmask; 1252 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr; 1253 1254 m = rt_msg_mbuf(cmd, &rtinfo); 1255 if (m == NULL) 1256 return; 1257 1258 ifam = mtod(m, struct ifa_msghdr *); 1259 ifam->ifam_index = ifp->if_index; 1260 ifam->ifam_flags = ifa->ifa_flags; 1261 ifam->ifam_addrs = rtinfo.rti_addrs; 1262 ifam->ifam_addrflags = if_addrflags(ifa); 1263 ifam->ifam_metric = ifa->ifa_metric; 1264 1265 rts_input(m, familyof(ifa->ifa_addr)); 1266 } 1267 1268 void 1269 rt_rtmsg(int cmd, struct rtentry *rt, struct ifnet *ifp, int error) 1270 { 1271 struct rt_msghdr *rtm; 1272 struct rt_addrinfo rtinfo; 1273 struct mbuf *m; 1274 struct sockaddr *dst; 1275 1276 if (rt == NULL) 1277 return; 1278 1279 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1280 rtinfo.rti_dst = dst = rt_key(rt); 1281 rtinfo.rti_gateway = rt->rt_gateway; 1282 rtinfo.rti_netmask = rt_mask(rt); 1283 if (ifp != NULL) { 1284 rtinfo.rti_ifpaddr = 1285 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr; 1286 } 1287 if (rt->rt_ifa != NULL) 1288 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr; 1289 1290 m = rt_msg_mbuf(cmd, &rtinfo); 1291 if (m == NULL) 1292 return; 1293 1294 rtm = mtod(m, struct rt_msghdr *); 1295 if (ifp != NULL) 1296 rtm->rtm_index = ifp->if_index; 1297 rtm->rtm_flags |= rt->rt_flags; 1298 rtm->rtm_errno = error; 1299 rtm->rtm_addrs = rtinfo.rti_addrs; 1300 1301 rts_input(m, familyof(dst)); 1302 } 1303 1304 /* 1305 * This is called to generate messages from the routing socket 1306 * indicating a network interface has had addresses associated with it. 1307 * if we ever reverse the logic and replace messages TO the routing 1308 * socket indicate a request to configure interfaces, then it will 1309 * be unnecessary as the routing socket will automatically generate 1310 * copies of it. 1311 */ 1312 void 1313 rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt) 1314 { 1315 if (route_cb.any_count == 0) 1316 return; 1317 1318 if (cmd == RTM_ADD) { 1319 rt_ifamsg(RTM_NEWADDR, ifa); 1320 rt_rtmsg(RTM_ADD, rt, ifa->ifa_ifp, error); 1321 } else { 1322 KASSERT((cmd == RTM_DELETE), ("unknown cmd %d", cmd)); 1323 rt_rtmsg(RTM_DELETE, rt, ifa->ifa_ifp, error); 1324 rt_ifamsg(RTM_DELADDR, ifa); 1325 } 1326 } 1327 1328 /* 1329 * This is the analogue to the rt_newaddrmsg which performs the same 1330 * function but for multicast group memberhips. This is easier since 1331 * there is no route state to worry about. 1332 */ 1333 void 1334 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma) 1335 { 1336 struct rt_addrinfo rtinfo; 1337 struct mbuf *m = NULL; 1338 struct ifnet *ifp = ifma->ifma_ifp; 1339 struct ifma_msghdr *ifmam; 1340 1341 if (route_cb.any_count == 0) 1342 return; 1343 1344 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1345 rtinfo.rti_ifaaddr = ifma->ifma_addr; 1346 if (ifp != NULL && !TAILQ_EMPTY(&ifp->if_addrheads[mycpuid])) { 1347 rtinfo.rti_ifpaddr = 1348 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr; 1349 } 1350 /* 1351 * If a link-layer address is present, present it as a ``gateway'' 1352 * (similarly to how ARP entries, e.g., are presented). 1353 */ 1354 rtinfo.rti_gateway = ifma->ifma_lladdr; 1355 1356 m = rt_msg_mbuf(cmd, &rtinfo); 1357 if (m == NULL) 1358 return; 1359 1360 ifmam = mtod(m, struct ifma_msghdr *); 1361 ifmam->ifmam_index = ifp->if_index; 1362 ifmam->ifmam_addrs = rtinfo.rti_addrs; 1363 1364 rts_input(m, familyof(ifma->ifma_addr)); 1365 } 1366 1367 static struct mbuf * 1368 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1369 struct rt_addrinfo *info) 1370 { 1371 struct if_announcemsghdr *ifan; 1372 struct mbuf *m; 1373 1374 if (route_cb.any_count == 0) 1375 return NULL; 1376 1377 bzero(info, sizeof(*info)); 1378 m = rt_msg_mbuf(type, info); 1379 if (m == NULL) 1380 return NULL; 1381 1382 ifan = mtod(m, struct if_announcemsghdr *); 1383 ifan->ifan_index = ifp->if_index; 1384 strlcpy(ifan->ifan_name, ifp->if_xname, sizeof ifan->ifan_name); 1385 ifan->ifan_what = what; 1386 return m; 1387 } 1388 1389 /* 1390 * This is called to generate routing socket messages indicating 1391 * IEEE80211 wireless events. 1392 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1393 */ 1394 void 1395 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len) 1396 { 1397 struct rt_addrinfo info; 1398 struct mbuf *m; 1399 1400 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1401 if (m == NULL) 1402 return; 1403 1404 /* 1405 * Append the ieee80211 data. Try to stick it in the 1406 * mbuf containing the ifannounce msg; otherwise allocate 1407 * a new mbuf and append. 1408 * 1409 * NB: we assume m is a single mbuf. 1410 */ 1411 if (data_len > M_TRAILINGSPACE(m)) { 1412 /* XXX use m_getb(data_len, M_NOWAIT, MT_DATA, 0); */ 1413 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 1414 if (n == NULL) { 1415 m_freem(m); 1416 return; 1417 } 1418 KKASSERT(data_len <= M_TRAILINGSPACE(n)); 1419 bcopy(data, mtod(n, void *), data_len); 1420 n->m_len = data_len; 1421 m->m_next = n; 1422 } else if (data_len > 0) { 1423 bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len); 1424 m->m_len += data_len; 1425 } 1426 mbuftrackid(m, 33); 1427 if (m->m_flags & M_PKTHDR) 1428 m->m_pkthdr.len += data_len; 1429 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len; 1430 rts_input(m, 0); 1431 } 1432 1433 /* 1434 * This is called to generate routing socket messages indicating 1435 * network interface arrival and departure. 1436 */ 1437 void 1438 rt_ifannouncemsg(struct ifnet *ifp, int what) 1439 { 1440 struct rt_addrinfo addrinfo; 1441 struct mbuf *m; 1442 1443 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &addrinfo); 1444 if (m != NULL) 1445 rts_input(m, 0); 1446 } 1447 1448 static int 1449 resizewalkarg(struct walkarg *w, int len) 1450 { 1451 void *newptr; 1452 1453 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 1454 if (newptr == NULL) 1455 return (ENOMEM); 1456 if (w->w_tmem != NULL) 1457 kfree(w->w_tmem, M_RTABLE); 1458 w->w_tmem = newptr; 1459 w->w_tmemsize = len; 1460 bzero(newptr, len); 1461 1462 return (0); 1463 } 1464 1465 static void 1466 ifnet_compute_stats(struct ifnet *ifp) 1467 { 1468 IFNET_STAT_GET(ifp, ipackets, ifp->if_ipackets); 1469 IFNET_STAT_GET(ifp, ierrors, ifp->if_ierrors); 1470 IFNET_STAT_GET(ifp, opackets, ifp->if_opackets); 1471 IFNET_STAT_GET(ifp, collisions, ifp->if_collisions); 1472 IFNET_STAT_GET(ifp, ibytes, ifp->if_ibytes); 1473 IFNET_STAT_GET(ifp, obytes, ifp->if_obytes); 1474 IFNET_STAT_GET(ifp, imcasts, ifp->if_imcasts); 1475 IFNET_STAT_GET(ifp, omcasts, ifp->if_omcasts); 1476 IFNET_STAT_GET(ifp, iqdrops, ifp->if_iqdrops); 1477 IFNET_STAT_GET(ifp, noproto, ifp->if_noproto); 1478 IFNET_STAT_GET(ifp, oqdrops, ifp->if_oqdrops); 1479 } 1480 1481 static int 1482 if_addrflags(const struct ifaddr *ifa) 1483 { 1484 switch (ifa->ifa_addr->sa_family) { 1485 #ifdef INET6 1486 case AF_INET6: 1487 return ((const struct in6_ifaddr *)ifa)->ia6_flags; 1488 #endif 1489 default: 1490 return 0; 1491 } 1492 } 1493 1494 static int 1495 sysctl_iflist(int af, struct walkarg *w) 1496 { 1497 struct ifnet *ifp; 1498 struct rt_addrinfo rtinfo; 1499 int msglen, error; 1500 1501 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1502 1503 ifnet_lock(); 1504 TAILQ_FOREACH(ifp, &ifnetlist, if_link) { 1505 struct ifaddr_container *ifac, *ifac_mark; 1506 struct ifaddr_marker mark; 1507 struct ifaddrhead *head; 1508 struct ifaddr *ifa; 1509 1510 if (w->w_arg && w->w_arg != ifp->if_index) 1511 continue; 1512 head = &ifp->if_addrheads[mycpuid]; 1513 /* 1514 * There is no need to reference the first ifaddr 1515 * even if the following resizewalkarg() blocks, 1516 * since the first ifaddr will not be destroyed 1517 * when the ifnet lock is held. 1518 */ 1519 ifac = TAILQ_FIRST(head); 1520 ifa = ifac->ifa; 1521 rtinfo.rti_ifpaddr = ifa->ifa_addr; 1522 msglen = rt_msgsize(RTM_IFINFO, &rtinfo); 1523 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0) { 1524 ifnet_unlock(); 1525 return (ENOMEM); 1526 } 1527 rt_msg_buffer(RTM_IFINFO, &rtinfo, w->w_tmem, msglen); 1528 rtinfo.rti_ifpaddr = NULL; 1529 if (w->w_req != NULL && w->w_tmem != NULL) { 1530 struct if_msghdr *ifm = w->w_tmem; 1531 1532 ifm->ifm_index = ifp->if_index; 1533 ifm->ifm_flags = ifp->if_flags; 1534 ifnet_compute_stats(ifp); 1535 ifm->ifm_data = ifp->if_data; 1536 ifm->ifm_addrs = rtinfo.rti_addrs; 1537 error = SYSCTL_OUT(w->w_req, ifm, msglen); 1538 if (error) { 1539 ifnet_unlock(); 1540 return (error); 1541 } 1542 } 1543 /* 1544 * Add a marker, since SYSCTL_OUT() could block and during 1545 * that period the list could be changed. 1546 */ 1547 ifa_marker_init(&mark, ifp); 1548 ifac_mark = &mark.ifac; 1549 TAILQ_INSERT_AFTER(head, ifac, ifac_mark, ifa_link); 1550 while ((ifac = TAILQ_NEXT(ifac_mark, ifa_link)) != NULL) { 1551 TAILQ_REMOVE(head, ifac_mark, ifa_link); 1552 TAILQ_INSERT_AFTER(head, ifac, ifac_mark, ifa_link); 1553 1554 ifa = ifac->ifa; 1555 1556 /* Ignore marker */ 1557 if (ifa->ifa_addr->sa_family == AF_UNSPEC) 1558 continue; 1559 1560 if (af && af != ifa->ifa_addr->sa_family) 1561 continue; 1562 if (curproc->p_ucred->cr_prison && 1563 prison_if(curproc->p_ucred, ifa->ifa_addr)) 1564 continue; 1565 rtinfo.rti_ifaaddr = ifa->ifa_addr; 1566 rtinfo.rti_netmask = ifa->ifa_netmask; 1567 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr; 1568 msglen = rt_msgsize(RTM_NEWADDR, &rtinfo); 1569 /* 1570 * Keep a reference on this ifaddr, so that it will 1571 * not be destroyed if the following resizewalkarg() 1572 * blocks. 1573 */ 1574 IFAREF(ifa); 1575 if (w->w_tmemsize < msglen && 1576 resizewalkarg(w, msglen) != 0) { 1577 IFAFREE(ifa); 1578 TAILQ_REMOVE(head, ifac_mark, ifa_link); 1579 ifnet_unlock(); 1580 return (ENOMEM); 1581 } 1582 rt_msg_buffer(RTM_NEWADDR, &rtinfo, w->w_tmem, msglen); 1583 if (w->w_req != NULL) { 1584 struct ifa_msghdr *ifam = w->w_tmem; 1585 1586 ifam->ifam_index = ifa->ifa_ifp->if_index; 1587 ifam->ifam_flags = ifa->ifa_flags; 1588 ifam->ifam_addrs = rtinfo.rti_addrs; 1589 ifam->ifam_addrflags = if_addrflags(ifa); 1590 ifam->ifam_metric = ifa->ifa_metric; 1591 error = SYSCTL_OUT(w->w_req, w->w_tmem, msglen); 1592 if (error) { 1593 IFAFREE(ifa); 1594 TAILQ_REMOVE(head, ifac_mark, ifa_link); 1595 ifnet_unlock(); 1596 return (error); 1597 } 1598 } 1599 IFAFREE(ifa); 1600 } 1601 TAILQ_REMOVE(head, ifac_mark, ifa_link); 1602 rtinfo.rti_netmask = NULL; 1603 rtinfo.rti_ifaaddr = NULL; 1604 rtinfo.rti_bcastaddr = NULL; 1605 } 1606 ifnet_unlock(); 1607 return (0); 1608 } 1609 1610 static int 1611 rttable_walkarg_create(struct rttable_walkarg *w, int op, int arg) 1612 { 1613 struct rt_addrinfo rtinfo; 1614 struct sockaddr_storage ss; 1615 int i, msglen; 1616 1617 memset(w, 0, sizeof(*w)); 1618 w->w_op = op; 1619 w->w_arg = arg; 1620 1621 memset(&ss, 0, sizeof(ss)); 1622 ss.ss_len = sizeof(ss); 1623 1624 memset(&rtinfo, 0, sizeof(rtinfo)); 1625 for (i = 0; i < RTAX_MAX; ++i) 1626 rtinfo.rti_info[i] = (struct sockaddr *)&ss; 1627 msglen = rt_msgsize(RTM_GET, &rtinfo); 1628 1629 w->w_bufsz = msglen * RTTABLE_DUMP_MSGCNT_MAX; 1630 w->w_buf = kmalloc(w->w_bufsz, M_TEMP, M_WAITOK | M_NULLOK); 1631 if (w->w_buf == NULL) 1632 return ENOMEM; 1633 return 0; 1634 } 1635 1636 static void 1637 rttable_walkarg_destroy(struct rttable_walkarg *w) 1638 { 1639 kfree(w->w_buf, M_TEMP); 1640 } 1641 1642 static void 1643 rttable_entry_rtinfo(struct rt_addrinfo *rtinfo, struct radix_node *rn) 1644 { 1645 struct rtentry *rt = (struct rtentry *)rn; 1646 1647 bzero(rtinfo, sizeof(*rtinfo)); 1648 rtinfo->rti_dst = rt_key(rt); 1649 rtinfo->rti_gateway = rt->rt_gateway; 1650 rtinfo->rti_netmask = rt_mask(rt); 1651 rtinfo->rti_genmask = rt->rt_genmask; 1652 if (rt->rt_ifp != NULL) { 1653 rtinfo->rti_ifpaddr = 1654 TAILQ_FIRST(&rt->rt_ifp->if_addrheads[mycpuid])->ifa->ifa_addr; 1655 rtinfo->rti_ifaaddr = rt->rt_ifa->ifa_addr; 1656 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1657 rtinfo->rti_bcastaddr = rt->rt_ifa->ifa_dstaddr; 1658 } 1659 } 1660 1661 static int 1662 rttable_walk_entry(struct radix_node *rn, void *xw) 1663 { 1664 struct rttable_walkarg *w = xw; 1665 struct rtentry *rt = (struct rtentry *)rn; 1666 struct rt_addrinfo rtinfo; 1667 struct rt_msghdr *rtm; 1668 boolean_t save = FALSE; 1669 int msglen, w_bufleft; 1670 void *ptr; 1671 1672 rttable_entry_rtinfo(&rtinfo, rn); 1673 msglen = rt_msgsize(RTM_GET, &rtinfo); 1674 1675 w_bufleft = w->w_bufsz - w->w_buflen; 1676 1677 if (rn->rn_dupedkey != NULL) { 1678 struct radix_node *rn1 = rn; 1679 int total_msglen = msglen; 1680 1681 /* 1682 * Make sure that we have enough space left for all 1683 * dupedkeys, since rn_walktree_at always starts 1684 * from the first dupedkey. 1685 */ 1686 while ((rn1 = rn1->rn_dupedkey) != NULL) { 1687 struct rt_addrinfo rtinfo1; 1688 int msglen1; 1689 1690 if (rn1->rn_flags & RNF_ROOT) 1691 continue; 1692 1693 rttable_entry_rtinfo(&rtinfo1, rn1); 1694 msglen1 = rt_msgsize(RTM_GET, &rtinfo1); 1695 total_msglen += msglen1; 1696 } 1697 1698 if (total_msglen > w_bufleft) { 1699 if (total_msglen > w->w_bufsz) { 1700 static int logged = 0; 1701 1702 if (!logged) { 1703 kprintf("buffer is too small for " 1704 "all dupedkeys, increase " 1705 "RTTABLE_DUMP_MSGCNT_MAX\n"); 1706 logged = 1; 1707 } 1708 return ENOMEM; 1709 } 1710 save = TRUE; 1711 } 1712 } else if (msglen > w_bufleft) { 1713 save = TRUE; 1714 } 1715 1716 if (save) { 1717 /* 1718 * Not enough buffer left; remember the position 1719 * to start from upon next round. 1720 */ 1721 KASSERT(msglen <= w->w_bufsz, ("msg too long %d", msglen)); 1722 1723 KASSERT(rtinfo.rti_dst->sa_len <= sizeof(w->w_key0), 1724 ("key too long %d", rtinfo.rti_dst->sa_len)); 1725 memset(&w->w_key0, 0, sizeof(w->w_key0)); 1726 memcpy(&w->w_key0, rtinfo.rti_dst, rtinfo.rti_dst->sa_len); 1727 w->w_key = (const char *)&w->w_key0; 1728 1729 if (rtinfo.rti_netmask != NULL) { 1730 KASSERT( 1731 rtinfo.rti_netmask->sa_len <= sizeof(w->w_mask0), 1732 ("mask too long %d", rtinfo.rti_netmask->sa_len)); 1733 memset(&w->w_mask0, 0, sizeof(w->w_mask0)); 1734 memcpy(&w->w_mask0, rtinfo.rti_netmask, 1735 rtinfo.rti_netmask->sa_len); 1736 w->w_mask = (const char *)&w->w_mask0; 1737 } else { 1738 w->w_mask = NULL; 1739 } 1740 return EJUSTRETURN; 1741 } 1742 1743 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1744 return 0; 1745 1746 ptr = ((uint8_t *)w->w_buf) + w->w_buflen; 1747 rt_msg_buffer(RTM_GET, &rtinfo, ptr, msglen); 1748 1749 rtm = (struct rt_msghdr *)ptr; 1750 rtm->rtm_flags = rt->rt_flags; 1751 rtm->rtm_use = rt->rt_use; 1752 rtm->rtm_rmx = rt->rt_rmx; 1753 rtm->rtm_index = rt->rt_ifp->if_index; 1754 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1755 rtm->rtm_addrs = rtinfo.rti_addrs; 1756 1757 w->w_buflen += msglen; 1758 1759 return 0; 1760 } 1761 1762 static void 1763 rttable_walk_dispatch(netmsg_t msg) 1764 { 1765 struct netmsg_rttable_walk *nmsg = (struct netmsg_rttable_walk *)msg; 1766 struct radix_node_head *rnh = rt_tables[mycpuid][nmsg->af]; 1767 struct rttable_walkarg *w = nmsg->w; 1768 int error; 1769 1770 error = rnh->rnh_walktree_at(rnh, w->w_key, w->w_mask, 1771 rttable_walk_entry, w); 1772 lwkt_replymsg(&nmsg->base.lmsg, error); 1773 } 1774 1775 static int 1776 sysctl_rttable(int af, struct sysctl_req *req, int op, int arg) 1777 { 1778 struct rttable_walkarg w; 1779 int error, i; 1780 1781 error = rttable_walkarg_create(&w, op, arg); 1782 if (error) 1783 return error; 1784 1785 error = EINVAL; 1786 for (i = 1; i <= AF_MAX; i++) { 1787 if (rt_tables[mycpuid][i] != NULL && (af == 0 || af == i)) { 1788 w.w_key = NULL; 1789 w.w_mask = NULL; 1790 for (;;) { 1791 struct netmsg_rttable_walk nmsg; 1792 1793 netmsg_init(&nmsg.base, NULL, 1794 &curthread->td_msgport, 0, 1795 rttable_walk_dispatch); 1796 nmsg.af = i; 1797 nmsg.w = &w; 1798 1799 w.w_buflen = 0; 1800 1801 error = lwkt_domsg(netisr_cpuport(mycpuid), 1802 &nmsg.base.lmsg, 0); 1803 if (error && error != EJUSTRETURN) 1804 goto done; 1805 1806 if (req != NULL && w.w_buflen > 0) { 1807 int error1; 1808 1809 error1 = SYSCTL_OUT(req, w.w_buf, 1810 w.w_buflen); 1811 if (error1) { 1812 error = error1; 1813 goto done; 1814 } 1815 } 1816 if (error == 0) /* done */ 1817 break; 1818 } 1819 } 1820 } 1821 done: 1822 rttable_walkarg_destroy(&w); 1823 return error; 1824 } 1825 1826 static int 1827 sysctl_rtsock(SYSCTL_HANDLER_ARGS) 1828 { 1829 int *name = (int *)arg1; 1830 u_int namelen = arg2; 1831 int error = EINVAL; 1832 int origcpu, cpu; 1833 u_char af; 1834 struct walkarg w; 1835 1836 name ++; 1837 namelen--; 1838 if (req->newptr) 1839 return (EPERM); 1840 if (namelen != 3 && namelen != 4) 1841 return (EINVAL); 1842 af = name[0]; 1843 bzero(&w, sizeof w); 1844 w.w_op = name[1]; 1845 w.w_arg = name[2]; 1846 w.w_req = req; 1847 1848 /* 1849 * Optional third argument specifies cpu, used primarily for 1850 * debugging the route table. 1851 */ 1852 if (namelen == 4) { 1853 if (name[3] < 0 || name[3] >= netisr_ncpus) 1854 return (EINVAL); 1855 cpu = name[3]; 1856 } else { 1857 /* 1858 * Target cpu is not specified, use cpu0 then, so that 1859 * the result set will be relatively stable. 1860 */ 1861 cpu = 0; 1862 } 1863 origcpu = mycpuid; 1864 lwkt_migratecpu(cpu); 1865 1866 switch (w.w_op) { 1867 case NET_RT_DUMP: 1868 case NET_RT_FLAGS: 1869 error = sysctl_rttable(af, w.w_req, w.w_op, w.w_arg); 1870 break; 1871 1872 case NET_RT_IFLIST: 1873 error = sysctl_iflist(af, &w); 1874 break; 1875 } 1876 if (w.w_tmem != NULL) 1877 kfree(w.w_tmem, M_RTABLE); 1878 1879 lwkt_migratecpu(origcpu); 1880 return (error); 1881 } 1882 1883 SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, ""); 1884 1885 /* 1886 * Definitions of protocols supported in the ROUTE domain. 1887 */ 1888 1889 static struct domain routedomain; /* or at least forward */ 1890 1891 static struct protosw routesw[] = { 1892 { 1893 .pr_type = SOCK_RAW, 1894 .pr_domain = &routedomain, 1895 .pr_protocol = 0, 1896 .pr_flags = PR_ATOMIC|PR_ADDR, 1897 .pr_input = NULL, 1898 .pr_output = route_output, 1899 .pr_ctlinput = raw_ctlinput, 1900 .pr_ctloutput = route_ctloutput, 1901 .pr_ctlport = cpu0_ctlport, 1902 1903 .pr_init = raw_init, 1904 .pr_usrreqs = &route_usrreqs 1905 } 1906 }; 1907 1908 static struct domain routedomain = { 1909 .dom_family = AF_ROUTE, 1910 .dom_name = "route", 1911 .dom_init = NULL, 1912 .dom_externalize = NULL, 1913 .dom_dispose = NULL, 1914 .dom_protosw = routesw, 1915 .dom_protoswNPROTOSW = &routesw[NELEM(routesw)], 1916 .dom_next = SLIST_ENTRY_INITIALIZER, 1917 .dom_rtattach = NULL, 1918 .dom_rtoffset = 0, 1919 .dom_maxrtkey = 0, 1920 .dom_ifattach = NULL, 1921 .dom_ifdetach = NULL 1922 }; 1923 1924 DOMAIN_SET(route); 1925 1926