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. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by the University of 48 * California, Berkeley and its contributors. 49 * 4. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * @(#)rtsock.c 8.7 (Berkeley) 10/12/95 66 * $FreeBSD: src/sys/net/rtsock.c,v 1.44.2.11 2002/12/04 14:05:41 ru Exp $ 67 * $DragonFly: src/sys/net/rtsock.c,v 1.39 2007/06/24 20:00:00 dillon Exp $ 68 */ 69 70 #include "opt_sctp.h" 71 72 #include <sys/param.h> 73 #include <sys/systm.h> 74 #include <sys/kernel.h> 75 #include <sys/sysctl.h> 76 #include <sys/proc.h> 77 #include <sys/malloc.h> 78 #include <sys/mbuf.h> 79 #include <sys/protosw.h> 80 #include <sys/socket.h> 81 #include <sys/socketvar.h> 82 #include <sys/domain.h> 83 #include <sys/thread2.h> 84 85 #include <net/if.h> 86 #include <net/route.h> 87 #include <net/raw_cb.h> 88 #include <net/netmsg2.h> 89 90 #ifdef SCTP 91 extern void sctp_add_ip_address(struct ifaddr *ifa); 92 extern void sctp_delete_ip_address(struct ifaddr *ifa); 93 #endif /* SCTP */ 94 95 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables"); 96 97 static struct route_cb { 98 int ip_count; 99 int ip6_count; 100 int ipx_count; 101 int ns_count; 102 int any_count; 103 } route_cb; 104 105 static const struct sockaddr route_src = { 2, PF_ROUTE, }; 106 107 struct walkarg { 108 int w_tmemsize; 109 int w_op, w_arg; 110 void *w_tmem; 111 struct sysctl_req *w_req; 112 }; 113 114 static struct mbuf * 115 rt_msg_mbuf (int, struct rt_addrinfo *); 116 static void rt_msg_buffer (int, struct rt_addrinfo *, void *buf, int len); 117 static int rt_msgsize (int type, struct rt_addrinfo *rtinfo); 118 static int rt_xaddrs (char *, char *, struct rt_addrinfo *); 119 static int sysctl_dumpentry (struct radix_node *rn, void *vw); 120 static int sysctl_iflist (int af, struct walkarg *w); 121 static int route_output(struct mbuf *, struct socket *, ...); 122 static void rt_setmetrics (u_long, struct rt_metrics *, 123 struct rt_metrics *); 124 125 /* 126 * It really doesn't make any sense at all for this code to share much 127 * with raw_usrreq.c, since its functionality is so restricted. XXX 128 */ 129 static int 130 rts_abort(struct socket *so) 131 { 132 int error; 133 134 crit_enter(); 135 error = raw_usrreqs.pru_abort(so); 136 crit_exit(); 137 return error; 138 } 139 140 /* pru_accept is EOPNOTSUPP */ 141 142 static int 143 rts_attach(struct socket *so, int proto, struct pru_attach_info *ai) 144 { 145 struct rawcb *rp; 146 int error; 147 148 if (sotorawcb(so) != NULL) 149 return EISCONN; /* XXX panic? */ 150 151 rp = kmalloc(sizeof *rp, M_PCB, M_WAITOK | M_ZERO); 152 if (rp == NULL) 153 return ENOBUFS; 154 155 /* 156 * The critical section is necessary to block protocols from sending 157 * error notifications (like RTM_REDIRECT or RTM_LOSING) while 158 * this PCB is extant but incompletely initialized. 159 * Probably we should try to do more of this work beforehand and 160 * eliminate the critical section. 161 */ 162 crit_enter(); 163 so->so_pcb = rp; 164 error = raw_attach(so, proto, ai->sb_rlimit); 165 rp = sotorawcb(so); 166 if (error) { 167 crit_exit(); 168 kfree(rp, M_PCB); 169 return error; 170 } 171 switch(rp->rcb_proto.sp_protocol) { 172 case AF_INET: 173 route_cb.ip_count++; 174 break; 175 case AF_INET6: 176 route_cb.ip6_count++; 177 break; 178 case AF_IPX: 179 route_cb.ipx_count++; 180 break; 181 case AF_NS: 182 route_cb.ns_count++; 183 break; 184 } 185 rp->rcb_faddr = &route_src; 186 route_cb.any_count++; 187 soisconnected(so); 188 so->so_options |= SO_USELOOPBACK; 189 crit_exit(); 190 return 0; 191 } 192 193 static int 194 rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 195 { 196 int error; 197 198 crit_enter(); 199 error = raw_usrreqs.pru_bind(so, nam, td); /* xxx just EINVAL */ 200 crit_exit(); 201 return error; 202 } 203 204 static int 205 rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 206 { 207 int error; 208 209 crit_enter(); 210 error = raw_usrreqs.pru_connect(so, nam, td); /* XXX just EINVAL */ 211 crit_exit(); 212 return error; 213 } 214 215 /* pru_connect2 is EOPNOTSUPP */ 216 /* pru_control is EOPNOTSUPP */ 217 218 static int 219 rts_detach(struct socket *so) 220 { 221 struct rawcb *rp = sotorawcb(so); 222 int error; 223 224 crit_enter(); 225 if (rp != NULL) { 226 switch(rp->rcb_proto.sp_protocol) { 227 case AF_INET: 228 route_cb.ip_count--; 229 break; 230 case AF_INET6: 231 route_cb.ip6_count--; 232 break; 233 case AF_IPX: 234 route_cb.ipx_count--; 235 break; 236 case AF_NS: 237 route_cb.ns_count--; 238 break; 239 } 240 route_cb.any_count--; 241 } 242 error = raw_usrreqs.pru_detach(so); 243 crit_exit(); 244 return error; 245 } 246 247 static int 248 rts_disconnect(struct socket *so) 249 { 250 int error; 251 252 crit_enter(); 253 error = raw_usrreqs.pru_disconnect(so); 254 crit_exit(); 255 return error; 256 } 257 258 /* pru_listen is EOPNOTSUPP */ 259 260 static int 261 rts_peeraddr(struct socket *so, struct sockaddr **nam) 262 { 263 int error; 264 265 crit_enter(); 266 error = raw_usrreqs.pru_peeraddr(so, nam); 267 crit_exit(); 268 return error; 269 } 270 271 /* pru_rcvd is EOPNOTSUPP */ 272 /* pru_rcvoob is EOPNOTSUPP */ 273 274 static int 275 rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 276 struct mbuf *control, struct thread *td) 277 { 278 int error; 279 280 crit_enter(); 281 error = raw_usrreqs.pru_send(so, flags, m, nam, control, td); 282 crit_exit(); 283 return error; 284 } 285 286 /* pru_sense is null */ 287 288 static int 289 rts_shutdown(struct socket *so) 290 { 291 int error; 292 293 crit_enter(); 294 error = raw_usrreqs.pru_shutdown(so); 295 crit_exit(); 296 return error; 297 } 298 299 static int 300 rts_sockaddr(struct socket *so, struct sockaddr **nam) 301 { 302 int error; 303 304 crit_enter(); 305 error = raw_usrreqs.pru_sockaddr(so, nam); 306 crit_exit(); 307 return error; 308 } 309 310 static struct pr_usrreqs route_usrreqs = { 311 .pru_abort = rts_abort, 312 .pru_accept = pru_accept_notsupp, 313 .pru_attach = rts_attach, 314 .pru_bind = rts_bind, 315 .pru_connect = rts_connect, 316 .pru_connect2 = pru_connect2_notsupp, 317 .pru_control = pru_control_notsupp, 318 .pru_detach = rts_detach, 319 .pru_disconnect = rts_disconnect, 320 .pru_listen = pru_listen_notsupp, 321 .pru_peeraddr = rts_peeraddr, 322 .pru_rcvd = pru_rcvd_notsupp, 323 .pru_rcvoob = pru_rcvoob_notsupp, 324 .pru_send = rts_send, 325 .pru_sense = pru_sense_null, 326 .pru_shutdown = rts_shutdown, 327 .pru_sockaddr = rts_sockaddr, 328 .pru_sosend = sosend, 329 .pru_soreceive = soreceive, 330 .pru_sopoll = sopoll 331 }; 332 333 static __inline sa_family_t 334 familyof(struct sockaddr *sa) 335 { 336 return (sa != NULL ? sa->sa_family : 0); 337 } 338 339 /* 340 * Routing socket input function. The packet must be serialized onto cpu 0. 341 * We use the cpu0_soport() netisr processing loop to handle it. 342 * 343 * This looks messy but it means that anyone, including interrupt code, 344 * can send a message to the routing socket. 345 */ 346 static void 347 rts_input_handler(struct netmsg *msg) 348 { 349 static const struct sockaddr route_dst = { 2, PF_ROUTE, }; 350 struct sockproto route_proto; 351 struct netmsg_packet *pmsg; 352 struct mbuf *m; 353 sa_family_t family; 354 355 pmsg = (void *)msg; 356 m = pmsg->nm_packet; 357 family = pmsg->nm_netmsg.nm_lmsg.u.ms_result; 358 route_proto.sp_family = PF_ROUTE; 359 route_proto.sp_protocol = family; 360 361 raw_input(m, &route_proto, &route_src, &route_dst); 362 } 363 364 static void 365 rts_input(struct mbuf *m, sa_family_t family) 366 { 367 struct netmsg_packet *pmsg; 368 lwkt_port_t port; 369 370 port = cpu0_soport(NULL, NULL, 0); 371 pmsg = &m->m_hdr.mh_netmsg; 372 netmsg_init(&pmsg->nm_netmsg, &netisr_apanic_rport, 373 0, rts_input_handler); 374 pmsg->nm_packet = m; 375 pmsg->nm_netmsg.nm_lmsg.u.ms_result = family; 376 lwkt_sendmsg(port, &pmsg->nm_netmsg.nm_lmsg); 377 } 378 379 static void * 380 reallocbuf(void *ptr, size_t len, size_t olen) 381 { 382 void *newptr; 383 384 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 385 if (newptr == NULL) 386 return NULL; 387 bcopy(ptr, newptr, olen); 388 kfree(ptr, M_RTABLE); 389 return (newptr); 390 } 391 392 /* 393 * Internal helper routine for route_output(). 394 */ 395 static int 396 fillrtmsg(struct rt_msghdr **prtm, struct rtentry *rt, 397 struct rt_addrinfo *rtinfo) 398 { 399 int msglen; 400 struct rt_msghdr *rtm = *prtm; 401 402 /* Fill in rt_addrinfo for call to rt_msg_buffer(). */ 403 rtinfo->rti_dst = rt_key(rt); 404 rtinfo->rti_gateway = rt->rt_gateway; 405 rtinfo->rti_netmask = rt_mask(rt); /* might be NULL */ 406 rtinfo->rti_genmask = rt->rt_genmask; /* might be NULL */ 407 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 408 if (rt->rt_ifp != NULL) { 409 rtinfo->rti_ifpaddr = 410 TAILQ_FIRST(&rt->rt_ifp->if_addrhead)->ifa_addr; 411 rtinfo->rti_ifaaddr = rt->rt_ifa->ifa_addr; 412 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 413 rtinfo->rti_bcastaddr = rt->rt_ifa->ifa_dstaddr; 414 rtm->rtm_index = rt->rt_ifp->if_index; 415 } else { 416 rtinfo->rti_ifpaddr = NULL; 417 rtinfo->rti_ifaaddr = NULL; 418 } 419 } 420 421 msglen = rt_msgsize(rtm->rtm_type, rtinfo); 422 if (rtm->rtm_msglen < msglen) { 423 rtm = reallocbuf(rtm, msglen, rtm->rtm_msglen); 424 if (rtm == NULL) 425 return (ENOBUFS); 426 *prtm = rtm; 427 } 428 rt_msg_buffer(rtm->rtm_type, rtinfo, rtm, msglen); 429 430 rtm->rtm_flags = rt->rt_flags; 431 rtm->rtm_rmx = rt->rt_rmx; 432 rtm->rtm_addrs = rtinfo->rti_addrs; 433 434 return (0); 435 } 436 437 static void route_output_add_callback(int, int, struct rt_addrinfo *, 438 struct rtentry *, void *); 439 static void route_output_delete_callback(int, int, struct rt_addrinfo *, 440 struct rtentry *, void *); 441 static void route_output_change_callback(int, int, struct rt_addrinfo *, 442 struct rtentry *, void *); 443 static void route_output_lock_callback(int, int, struct rt_addrinfo *, 444 struct rtentry *, void *); 445 446 /*ARGSUSED*/ 447 static int 448 route_output(struct mbuf *m, struct socket *so, ...) 449 { 450 struct rt_msghdr *rtm = NULL; 451 struct rtentry *rt; 452 struct radix_node_head *rnh; 453 struct rawcb *rp = NULL; 454 struct pr_output_info *oi; 455 struct rt_addrinfo rtinfo; 456 int len, error = 0; 457 __va_list ap; 458 459 __va_start(ap, so); 460 oi = __va_arg(ap, struct pr_output_info *); 461 __va_end(ap); 462 463 #define gotoerr(e) { error = e; goto flush;} 464 465 if (m == NULL || 466 (m->m_len < sizeof(long) && 467 (m = m_pullup(m, sizeof(long))) == NULL)) 468 return (ENOBUFS); 469 if (!(m->m_flags & M_PKTHDR)) 470 panic("route_output"); 471 len = m->m_pkthdr.len; 472 if (len < sizeof(struct rt_msghdr) || 473 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 474 rtinfo.rti_dst = NULL; 475 gotoerr(EINVAL); 476 } 477 rtm = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 478 if (rtm == NULL) { 479 rtinfo.rti_dst = NULL; 480 gotoerr(ENOBUFS); 481 } 482 m_copydata(m, 0, len, (caddr_t)rtm); 483 if (rtm->rtm_version != RTM_VERSION) { 484 rtinfo.rti_dst = NULL; 485 gotoerr(EPROTONOSUPPORT); 486 } 487 rtm->rtm_pid = oi->p_pid; 488 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 489 rtinfo.rti_addrs = rtm->rtm_addrs; 490 if (rt_xaddrs((char *)(rtm + 1), (char *)rtm + len, &rtinfo) != 0) { 491 rtinfo.rti_dst = NULL; 492 gotoerr(EINVAL); 493 } 494 rtinfo.rti_flags = rtm->rtm_flags; 495 if (rtinfo.rti_dst == NULL || rtinfo.rti_dst->sa_family >= AF_MAX || 496 (rtinfo.rti_gateway && rtinfo.rti_gateway->sa_family >= AF_MAX)) 497 gotoerr(EINVAL); 498 499 if (rtinfo.rti_genmask != NULL) { 500 struct radix_node *n; 501 502 #define clen(s) (*(u_char *)(s)) 503 n = rn_addmask((char *)rtinfo.rti_genmask, TRUE, 1); 504 if (n != NULL && 505 rtinfo.rti_genmask->sa_len >= clen(n->rn_key) && 506 bcmp((char *)rtinfo.rti_genmask + 1, 507 (char *)n->rn_key + 1, clen(n->rn_key) - 1) == 0) 508 rtinfo.rti_genmask = (struct sockaddr *)n->rn_key; 509 else 510 gotoerr(ENOBUFS); 511 } 512 513 /* 514 * Verify that the caller has the appropriate privilege; RTM_GET 515 * is the only operation the non-superuser is allowed. 516 */ 517 if (rtm->rtm_type != RTM_GET && suser_cred(so->so_cred, 0) != 0) 518 gotoerr(EPERM); 519 520 switch (rtm->rtm_type) { 521 case RTM_ADD: 522 if (rtinfo.rti_gateway == NULL) { 523 error = EINVAL; 524 } else { 525 error = rtrequest1_global(RTM_ADD, &rtinfo, 526 route_output_add_callback, rtm); 527 } 528 break; 529 case RTM_DELETE: 530 /* 531 * note: &rtm passed as argument so 'rtm' can be replaced. 532 */ 533 error = rtrequest1_global(RTM_DELETE, &rtinfo, 534 route_output_delete_callback, &rtm); 535 break; 536 case RTM_GET: 537 rnh = rt_tables[mycpuid][rtinfo.rti_dst->sa_family]; 538 if (rnh == NULL) { 539 error = EAFNOSUPPORT; 540 break; 541 } 542 rt = (struct rtentry *) 543 rnh->rnh_lookup((char *)rtinfo.rti_dst, 544 (char *)rtinfo.rti_netmask, rnh); 545 if (rt == NULL) { 546 error = ESRCH; 547 break; 548 } 549 rt->rt_refcnt++; 550 if (fillrtmsg(&rtm, rt, &rtinfo) != 0) 551 gotoerr(ENOBUFS); 552 --rt->rt_refcnt; 553 break; 554 case RTM_CHANGE: 555 error = rtrequest1_global(RTM_GET, &rtinfo, 556 route_output_change_callback, rtm); 557 break; 558 case RTM_LOCK: 559 error = rtrequest1_global(RTM_GET, &rtinfo, 560 route_output_lock_callback, rtm); 561 break; 562 default: 563 error = EOPNOTSUPP; 564 break; 565 } 566 567 flush: 568 if (rtm != NULL) { 569 if (error != 0) 570 rtm->rtm_errno = error; 571 else 572 rtm->rtm_flags |= RTF_DONE; 573 } 574 575 /* 576 * Check to see if we don't want our own messages. 577 */ 578 if (!(so->so_options & SO_USELOOPBACK)) { 579 if (route_cb.any_count <= 1) { 580 if (rtm != NULL) 581 kfree(rtm, M_RTABLE); 582 m_freem(m); 583 return (error); 584 } 585 /* There is another listener, so construct message */ 586 rp = sotorawcb(so); 587 } 588 if (rtm != NULL) { 589 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 590 if (m->m_pkthdr.len < rtm->rtm_msglen) { 591 m_freem(m); 592 m = NULL; 593 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 594 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 595 kfree(rtm, M_RTABLE); 596 } 597 if (rp != NULL) 598 rp->rcb_proto.sp_family = 0; /* Avoid us */ 599 if (m != NULL) 600 rts_input(m, familyof(rtinfo.rti_dst)); 601 if (rp != NULL) 602 rp->rcb_proto.sp_family = PF_ROUTE; 603 return (error); 604 } 605 606 static void 607 route_output_add_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 608 struct rtentry *rt, void *arg) 609 { 610 struct rt_msghdr *rtm = arg; 611 612 if (error == 0 && rt != NULL) { 613 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 614 &rt->rt_rmx); 615 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 616 rt->rt_rmx.rmx_locks |= 617 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 618 rt->rt_genmask = rtinfo->rti_genmask; 619 } 620 } 621 622 static void 623 route_output_delete_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 624 struct rtentry *rt, void *arg) 625 { 626 struct rt_msghdr **rtm = arg; 627 628 if (error == 0 && rt) { 629 ++rt->rt_refcnt; 630 if (fillrtmsg(rtm, rt, rtinfo) != 0) { 631 error = ENOBUFS; 632 /* XXX no way to return the error */ 633 } 634 --rt->rt_refcnt; 635 } 636 } 637 638 static void 639 route_output_change_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 640 struct rtentry *rt, void *arg) 641 { 642 struct rt_msghdr *rtm = arg; 643 struct ifaddr *ifa; 644 645 if (error) 646 goto done; 647 648 /* 649 * new gateway could require new ifaddr, ifp; 650 * flags may also be different; ifp may be specified 651 * by ll sockaddr when protocol address is ambiguous 652 */ 653 if (((rt->rt_flags & RTF_GATEWAY) && rtinfo->rti_gateway != NULL) || 654 rtinfo->rti_ifpaddr != NULL || (rtinfo->rti_ifaaddr != NULL && 655 sa_equal(rtinfo->rti_ifaaddr, rt->rt_ifa->ifa_addr)) 656 ) { 657 error = rt_getifa(rtinfo); 658 if (error != 0) 659 goto done; 660 } 661 if (rtinfo->rti_gateway != NULL) { 662 error = rt_setgate(rt, rt_key(rt), rtinfo->rti_gateway); 663 if (error != 0) 664 goto done; 665 } 666 if ((ifa = rtinfo->rti_ifa) != NULL) { 667 struct ifaddr *oifa = rt->rt_ifa; 668 669 if (oifa != ifa) { 670 if (oifa && oifa->ifa_rtrequest) 671 oifa->ifa_rtrequest(RTM_DELETE, rt, rtinfo); 672 IFAFREE(rt->rt_ifa); 673 IFAREF(ifa); 674 rt->rt_ifa = ifa; 675 rt->rt_ifp = rtinfo->rti_ifp; 676 } 677 } 678 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, &rt->rt_rmx); 679 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 680 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, rtinfo); 681 if (rtinfo->rti_genmask != NULL) 682 rt->rt_genmask = rtinfo->rti_genmask; 683 done: 684 /* XXX no way to return error */ 685 ; 686 } 687 688 static void 689 route_output_lock_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 690 struct rtentry *rt, void *arg) 691 { 692 struct rt_msghdr *rtm = arg; 693 694 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 695 rt->rt_rmx.rmx_locks |= 696 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 697 } 698 699 static void 700 rt_setmetrics(u_long which, struct rt_metrics *in, struct rt_metrics *out) 701 { 702 #define setmetric(flag, elt) if (which & (flag)) out->elt = in->elt; 703 setmetric(RTV_RPIPE, rmx_recvpipe); 704 setmetric(RTV_SPIPE, rmx_sendpipe); 705 setmetric(RTV_SSTHRESH, rmx_ssthresh); 706 setmetric(RTV_RTT, rmx_rtt); 707 setmetric(RTV_RTTVAR, rmx_rttvar); 708 setmetric(RTV_HOPCOUNT, rmx_hopcount); 709 setmetric(RTV_MTU, rmx_mtu); 710 setmetric(RTV_EXPIRE, rmx_expire); 711 #undef setmetric 712 } 713 714 #define ROUNDUP(a) \ 715 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 716 717 /* 718 * Extract the addresses of the passed sockaddrs. 719 * Do a little sanity checking so as to avoid bad memory references. 720 * This data is derived straight from userland. 721 */ 722 static int 723 rt_xaddrs(char *cp, char *cplim, struct rt_addrinfo *rtinfo) 724 { 725 struct sockaddr *sa; 726 int i; 727 728 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 729 if ((rtinfo->rti_addrs & (1 << i)) == 0) 730 continue; 731 sa = (struct sockaddr *)cp; 732 /* 733 * It won't fit. 734 */ 735 if ((cp + sa->sa_len) > cplim) { 736 return (EINVAL); 737 } 738 739 /* 740 * There are no more... Quit now. 741 * If there are more bits, they are in error. 742 * I've seen this. route(1) can evidently generate these. 743 * This causes kernel to core dump. 744 * For compatibility, if we see this, point to a safe address. 745 */ 746 if (sa->sa_len == 0) { 747 static struct sockaddr sa_zero = { 748 sizeof sa_zero, AF_INET, 749 }; 750 751 rtinfo->rti_info[i] = &sa_zero; 752 return (0); /* should be EINVAL but for compat */ 753 } 754 755 /* Accept the sockaddr. */ 756 rtinfo->rti_info[i] = sa; 757 cp += ROUNDUP(sa->sa_len); 758 } 759 return (0); 760 } 761 762 static int 763 rt_msghdrsize(int type) 764 { 765 switch (type) { 766 case RTM_DELADDR: 767 case RTM_NEWADDR: 768 return sizeof(struct ifa_msghdr); 769 case RTM_DELMADDR: 770 case RTM_NEWMADDR: 771 return sizeof(struct ifma_msghdr); 772 case RTM_IFINFO: 773 return sizeof(struct if_msghdr); 774 case RTM_IFANNOUNCE: 775 case RTM_IEEE80211: 776 return sizeof(struct if_announcemsghdr); 777 default: 778 return sizeof(struct rt_msghdr); 779 } 780 } 781 782 static int 783 rt_msgsize(int type, struct rt_addrinfo *rtinfo) 784 { 785 int len, i; 786 787 len = rt_msghdrsize(type); 788 for (i = 0; i < RTAX_MAX; i++) { 789 if (rtinfo->rti_info[i] != NULL) 790 len += ROUNDUP(rtinfo->rti_info[i]->sa_len); 791 } 792 len = ALIGN(len); 793 return len; 794 } 795 796 /* 797 * Build a routing message in a buffer. 798 * Copy the addresses in the rtinfo->rti_info[] sockaddr array 799 * to the end of the buffer after the message header. 800 * 801 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[]. 802 * This side-effect can be avoided if we reorder the addrs bitmask field in all 803 * the route messages to line up so we can set it here instead of back in the 804 * calling routine. 805 */ 806 static void 807 rt_msg_buffer(int type, struct rt_addrinfo *rtinfo, void *buf, int msglen) 808 { 809 struct rt_msghdr *rtm; 810 char *cp; 811 int dlen, i; 812 813 rtm = (struct rt_msghdr *) buf; 814 rtm->rtm_version = RTM_VERSION; 815 rtm->rtm_type = type; 816 rtm->rtm_msglen = msglen; 817 818 cp = (char *)buf + rt_msghdrsize(type); 819 rtinfo->rti_addrs = 0; 820 for (i = 0; i < RTAX_MAX; i++) { 821 struct sockaddr *sa; 822 823 if ((sa = rtinfo->rti_info[i]) == NULL) 824 continue; 825 rtinfo->rti_addrs |= (1 << i); 826 dlen = ROUNDUP(sa->sa_len); 827 bcopy(sa, cp, dlen); 828 cp += dlen; 829 } 830 } 831 832 /* 833 * Build a routing message in a mbuf chain. 834 * Copy the addresses in the rtinfo->rti_info[] sockaddr array 835 * to the end of the mbuf after the message header. 836 * 837 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[]. 838 * This side-effect can be avoided if we reorder the addrs bitmask field in all 839 * the route messages to line up so we can set it here instead of back in the 840 * calling routine. 841 */ 842 static struct mbuf * 843 rt_msg_mbuf(int type, struct rt_addrinfo *rtinfo) 844 { 845 struct mbuf *m; 846 struct rt_msghdr *rtm; 847 int hlen, len; 848 int i; 849 850 hlen = rt_msghdrsize(type); 851 KASSERT(hlen <= MCLBYTES, ("rt_msg_mbuf: hlen %d doesn't fit", hlen)); 852 853 m = m_getl(hlen, MB_DONTWAIT, MT_DATA, M_PKTHDR, NULL); 854 if (m == NULL) 855 return (NULL); 856 m->m_pkthdr.len = m->m_len = hlen; 857 m->m_pkthdr.rcvif = NULL; 858 rtinfo->rti_addrs = 0; 859 len = hlen; 860 for (i = 0; i < RTAX_MAX; i++) { 861 struct sockaddr *sa; 862 int dlen; 863 864 if ((sa = rtinfo->rti_info[i]) == NULL) 865 continue; 866 rtinfo->rti_addrs |= (1 << i); 867 dlen = ROUNDUP(sa->sa_len); 868 m_copyback(m, len, dlen, (caddr_t)sa); /* can grow mbuf chain */ 869 len += dlen; 870 } 871 if (m->m_pkthdr.len != len) { /* one of the m_copyback() calls failed */ 872 m_freem(m); 873 return (NULL); 874 } 875 rtm = mtod(m, struct rt_msghdr *); 876 bzero(rtm, hlen); 877 rtm->rtm_msglen = len; 878 rtm->rtm_version = RTM_VERSION; 879 rtm->rtm_type = type; 880 return (m); 881 } 882 883 /* 884 * This routine is called to generate a message from the routing 885 * socket indicating that a redirect has occurred, a routing lookup 886 * has failed, or that a protocol has detected timeouts to a particular 887 * destination. 888 */ 889 void 890 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error) 891 { 892 struct sockaddr *dst = rtinfo->rti_info[RTAX_DST]; 893 struct rt_msghdr *rtm; 894 struct mbuf *m; 895 896 if (route_cb.any_count == 0) 897 return; 898 m = rt_msg_mbuf(type, rtinfo); 899 if (m == NULL) 900 return; 901 rtm = mtod(m, struct rt_msghdr *); 902 rtm->rtm_flags = RTF_DONE | flags; 903 rtm->rtm_errno = error; 904 rtm->rtm_addrs = rtinfo->rti_addrs; 905 rts_input(m, familyof(dst)); 906 } 907 908 void 909 rt_dstmsg(int type, struct sockaddr *dst, int error) 910 { 911 struct rt_msghdr *rtm; 912 struct rt_addrinfo addrs; 913 struct mbuf *m; 914 915 if (route_cb.any_count == 0) 916 return; 917 bzero(&addrs, sizeof(struct rt_addrinfo)); 918 addrs.rti_info[RTAX_DST] = dst; 919 m = rt_msg_mbuf(type, &addrs); 920 if (m == NULL) 921 return; 922 rtm = mtod(m, struct rt_msghdr *); 923 rtm->rtm_flags = RTF_DONE; 924 rtm->rtm_errno = error; 925 rtm->rtm_addrs = addrs.rti_addrs; 926 rts_input(m, familyof(dst)); 927 } 928 929 /* 930 * This routine is called to generate a message from the routing 931 * socket indicating that the status of a network interface has changed. 932 */ 933 void 934 rt_ifmsg(struct ifnet *ifp) 935 { 936 struct if_msghdr *ifm; 937 struct mbuf *m; 938 struct rt_addrinfo rtinfo; 939 940 if (route_cb.any_count == 0) 941 return; 942 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 943 m = rt_msg_mbuf(RTM_IFINFO, &rtinfo); 944 if (m == NULL) 945 return; 946 ifm = mtod(m, struct if_msghdr *); 947 ifm->ifm_index = ifp->if_index; 948 ifm->ifm_flags = ifp->if_flags; 949 ifm->ifm_data = ifp->if_data; 950 ifm->ifm_addrs = 0; 951 rts_input(m, 0); 952 } 953 954 static void 955 rt_ifamsg(int cmd, struct ifaddr *ifa) 956 { 957 struct ifa_msghdr *ifam; 958 struct rt_addrinfo rtinfo; 959 struct mbuf *m; 960 struct ifnet *ifp = ifa->ifa_ifp; 961 962 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 963 rtinfo.rti_ifaaddr = ifa->ifa_addr; 964 rtinfo.rti_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr; 965 rtinfo.rti_netmask = ifa->ifa_netmask; 966 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr; 967 968 m = rt_msg_mbuf(cmd, &rtinfo); 969 if (m == NULL) 970 return; 971 972 ifam = mtod(m, struct ifa_msghdr *); 973 ifam->ifam_index = ifp->if_index; 974 ifam->ifam_metric = ifa->ifa_metric; 975 ifam->ifam_flags = ifa->ifa_flags; 976 ifam->ifam_addrs = rtinfo.rti_addrs; 977 978 rts_input(m, familyof(ifa->ifa_addr)); 979 } 980 981 void 982 rt_rtmsg(int cmd, struct rtentry *rt, struct ifnet *ifp, int error) 983 { 984 struct rt_msghdr *rtm; 985 struct rt_addrinfo rtinfo; 986 struct mbuf *m; 987 struct sockaddr *dst; 988 989 if (rt == NULL) 990 return; 991 992 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 993 rtinfo.rti_dst = dst = rt_key(rt); 994 rtinfo.rti_gateway = rt->rt_gateway; 995 rtinfo.rti_netmask = rt_mask(rt); 996 if (ifp != NULL) 997 rtinfo.rti_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr; 998 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr; 999 1000 m = rt_msg_mbuf(cmd, &rtinfo); 1001 if (m == NULL) 1002 return; 1003 1004 rtm = mtod(m, struct rt_msghdr *); 1005 if (ifp != NULL) 1006 rtm->rtm_index = ifp->if_index; 1007 rtm->rtm_flags |= rt->rt_flags; 1008 rtm->rtm_errno = error; 1009 rtm->rtm_addrs = rtinfo.rti_addrs; 1010 1011 rts_input(m, familyof(dst)); 1012 } 1013 1014 /* 1015 * This is called to generate messages from the routing socket 1016 * indicating a network interface has had addresses associated with it. 1017 * if we ever reverse the logic and replace messages TO the routing 1018 * socket indicate a request to configure interfaces, then it will 1019 * be unnecessary as the routing socket will automatically generate 1020 * copies of it. 1021 */ 1022 void 1023 rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt) 1024 { 1025 #ifdef SCTP 1026 /* 1027 * notify the SCTP stack 1028 * this will only get called when an address is added/deleted 1029 * XXX pass the ifaddr struct instead if ifa->ifa_addr... 1030 */ 1031 if (cmd == RTM_ADD) 1032 sctp_add_ip_address(ifa); 1033 else if (cmd == RTM_DELETE) 1034 sctp_delete_ip_address(ifa); 1035 #endif /* SCTP */ 1036 1037 if (route_cb.any_count == 0) 1038 return; 1039 1040 if (cmd == RTM_ADD) { 1041 rt_ifamsg(RTM_NEWADDR, ifa); 1042 rt_rtmsg(RTM_ADD, rt, ifa->ifa_ifp, error); 1043 } else { 1044 KASSERT((cmd == RTM_DELETE), ("unknown cmd %d", cmd)); 1045 rt_rtmsg(RTM_DELETE, rt, ifa->ifa_ifp, error); 1046 rt_ifamsg(RTM_DELADDR, ifa); 1047 } 1048 } 1049 1050 /* 1051 * This is the analogue to the rt_newaddrmsg which performs the same 1052 * function but for multicast group memberhips. This is easier since 1053 * there is no route state to worry about. 1054 */ 1055 void 1056 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma) 1057 { 1058 struct rt_addrinfo rtinfo; 1059 struct mbuf *m = NULL; 1060 struct ifnet *ifp = ifma->ifma_ifp; 1061 struct ifma_msghdr *ifmam; 1062 1063 if (route_cb.any_count == 0) 1064 return; 1065 1066 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1067 rtinfo.rti_ifaaddr = ifma->ifma_addr; 1068 if (ifp != NULL && !TAILQ_EMPTY(&ifp->if_addrhead)) 1069 rtinfo.rti_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr; 1070 /* 1071 * If a link-layer address is present, present it as a ``gateway'' 1072 * (similarly to how ARP entries, e.g., are presented). 1073 */ 1074 rtinfo.rti_gateway = ifma->ifma_lladdr; 1075 1076 m = rt_msg_mbuf(cmd, &rtinfo); 1077 if (m == NULL) 1078 return; 1079 1080 ifmam = mtod(m, struct ifma_msghdr *); 1081 ifmam->ifmam_index = ifp->if_index; 1082 ifmam->ifmam_addrs = rtinfo.rti_addrs; 1083 1084 rts_input(m, familyof(ifma->ifma_addr)); 1085 } 1086 1087 static struct mbuf * 1088 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1089 struct rt_addrinfo *info) 1090 { 1091 struct if_announcemsghdr *ifan; 1092 struct mbuf *m; 1093 1094 if (route_cb.any_count == 0) 1095 return NULL; 1096 1097 bzero(info, sizeof(*info)); 1098 m = rt_msg_mbuf(type, info); 1099 if (m == NULL) 1100 return NULL; 1101 1102 ifan = mtod(m, struct if_announcemsghdr *); 1103 ifan->ifan_index = ifp->if_index; 1104 strlcpy(ifan->ifan_name, ifp->if_xname, sizeof ifan->ifan_name); 1105 ifan->ifan_what = what; 1106 return m; 1107 } 1108 1109 /* 1110 * This is called to generate routing socket messages indicating 1111 * IEEE80211 wireless events. 1112 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1113 */ 1114 void 1115 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len) 1116 { 1117 struct rt_addrinfo info; 1118 struct mbuf *m; 1119 1120 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1121 if (m == NULL) 1122 return; 1123 1124 /* 1125 * Append the ieee80211 data. Try to stick it in the 1126 * mbuf containing the ifannounce msg; otherwise allocate 1127 * a new mbuf and append. 1128 * 1129 * NB: we assume m is a single mbuf. 1130 */ 1131 if (data_len > M_TRAILINGSPACE(m)) { 1132 struct mbuf *n = m_get(MB_DONTWAIT, MT_DATA); 1133 if (n == NULL) { 1134 m_freem(m); 1135 return; 1136 } 1137 bcopy(data, mtod(n, void *), data_len); 1138 n->m_len = data_len; 1139 m->m_next = n; 1140 } else if (data_len > 0) { 1141 bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len); 1142 m->m_len += data_len; 1143 } 1144 if (m->m_flags & M_PKTHDR) 1145 m->m_pkthdr.len += data_len; 1146 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len; 1147 rts_input(m, 0); 1148 } 1149 1150 /* 1151 * This is called to generate routing socket messages indicating 1152 * network interface arrival and departure. 1153 */ 1154 void 1155 rt_ifannouncemsg(struct ifnet *ifp, int what) 1156 { 1157 struct rt_addrinfo addrinfo; 1158 struct mbuf *m; 1159 1160 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &addrinfo); 1161 if (m != NULL) 1162 rts_input(m, 0); 1163 } 1164 1165 static int 1166 resizewalkarg(struct walkarg *w, int len) 1167 { 1168 void *newptr; 1169 1170 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 1171 if (newptr == NULL) 1172 return (ENOMEM); 1173 if (w->w_tmem != NULL) 1174 kfree(w->w_tmem, M_RTABLE); 1175 w->w_tmem = newptr; 1176 w->w_tmemsize = len; 1177 return (0); 1178 } 1179 1180 /* 1181 * This is used in dumping the kernel table via sysctl(). 1182 */ 1183 int 1184 sysctl_dumpentry(struct radix_node *rn, void *vw) 1185 { 1186 struct walkarg *w = vw; 1187 struct rtentry *rt = (struct rtentry *)rn; 1188 struct rt_addrinfo rtinfo; 1189 int error, msglen; 1190 1191 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1192 return 0; 1193 1194 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1195 rtinfo.rti_dst = rt_key(rt); 1196 rtinfo.rti_gateway = rt->rt_gateway; 1197 rtinfo.rti_netmask = rt_mask(rt); 1198 rtinfo.rti_genmask = rt->rt_genmask; 1199 if (rt->rt_ifp != NULL) { 1200 rtinfo.rti_ifpaddr = 1201 TAILQ_FIRST(&rt->rt_ifp->if_addrhead)->ifa_addr; 1202 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr; 1203 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1204 rtinfo.rti_bcastaddr = rt->rt_ifa->ifa_dstaddr; 1205 } 1206 msglen = rt_msgsize(RTM_GET, &rtinfo); 1207 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0) 1208 return (ENOMEM); 1209 rt_msg_buffer(RTM_GET, &rtinfo, w->w_tmem, msglen); 1210 if (w->w_req != NULL) { 1211 struct rt_msghdr *rtm = w->w_tmem; 1212 1213 rtm->rtm_flags = rt->rt_flags; 1214 rtm->rtm_use = rt->rt_use; 1215 rtm->rtm_rmx = rt->rt_rmx; 1216 rtm->rtm_index = rt->rt_ifp->if_index; 1217 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1218 rtm->rtm_addrs = rtinfo.rti_addrs; 1219 error = SYSCTL_OUT(w->w_req, rtm, msglen); 1220 return (error); 1221 } 1222 return (0); 1223 } 1224 1225 static int 1226 sysctl_iflist(int af, struct walkarg *w) 1227 { 1228 struct ifnet *ifp; 1229 struct ifaddr *ifa; 1230 struct rt_addrinfo rtinfo; 1231 int msglen, error; 1232 1233 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1234 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1235 if (w->w_arg && w->w_arg != ifp->if_index) 1236 continue; 1237 ifa = TAILQ_FIRST(&ifp->if_addrhead); 1238 rtinfo.rti_ifpaddr = ifa->ifa_addr; 1239 msglen = rt_msgsize(RTM_IFINFO, &rtinfo); 1240 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0) 1241 return (ENOMEM); 1242 rt_msg_buffer(RTM_IFINFO, &rtinfo, w->w_tmem, msglen); 1243 rtinfo.rti_ifpaddr = NULL; 1244 if (w->w_req != NULL && w->w_tmem != NULL) { 1245 struct if_msghdr *ifm = w->w_tmem; 1246 1247 ifm->ifm_index = ifp->if_index; 1248 ifm->ifm_flags = ifp->if_flags; 1249 ifm->ifm_data = ifp->if_data; 1250 ifm->ifm_addrs = rtinfo.rti_addrs; 1251 error = SYSCTL_OUT(w->w_req, ifm, msglen); 1252 if (error) 1253 return (error); 1254 } 1255 while ((ifa = TAILQ_NEXT(ifa, ifa_link)) != NULL) { 1256 if (af && af != ifa->ifa_addr->sa_family) 1257 continue; 1258 if (curproc->p_ucred->cr_prison && 1259 prison_if(curproc->p_ucred, ifa->ifa_addr)) 1260 continue; 1261 rtinfo.rti_ifaaddr = ifa->ifa_addr; 1262 rtinfo.rti_netmask = ifa->ifa_netmask; 1263 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr; 1264 msglen = rt_msgsize(RTM_NEWADDR, &rtinfo); 1265 if (w->w_tmemsize < msglen && 1266 resizewalkarg(w, msglen) != 0) 1267 return (ENOMEM); 1268 rt_msg_buffer(RTM_NEWADDR, &rtinfo, w->w_tmem, msglen); 1269 if (w->w_req != NULL) { 1270 struct ifa_msghdr *ifam = w->w_tmem; 1271 1272 ifam->ifam_index = ifa->ifa_ifp->if_index; 1273 ifam->ifam_flags = ifa->ifa_flags; 1274 ifam->ifam_metric = ifa->ifa_metric; 1275 ifam->ifam_addrs = rtinfo.rti_addrs; 1276 error = SYSCTL_OUT(w->w_req, w->w_tmem, msglen); 1277 if (error) 1278 return (error); 1279 } 1280 } 1281 rtinfo.rti_netmask = NULL; 1282 rtinfo.rti_ifaaddr = NULL; 1283 rtinfo.rti_bcastaddr = NULL; 1284 } 1285 return (0); 1286 } 1287 1288 static int 1289 sysctl_rtsock(SYSCTL_HANDLER_ARGS) 1290 { 1291 int *name = (int *)arg1; 1292 u_int namelen = arg2; 1293 struct radix_node_head *rnh; 1294 int i, error = EINVAL; 1295 int origcpu; 1296 u_char af; 1297 struct walkarg w; 1298 1299 name ++; 1300 namelen--; 1301 if (req->newptr) 1302 return (EPERM); 1303 if (namelen != 3 && namelen != 4) 1304 return (EINVAL); 1305 af = name[0]; 1306 bzero(&w, sizeof w); 1307 w.w_op = name[1]; 1308 w.w_arg = name[2]; 1309 w.w_req = req; 1310 1311 /* 1312 * Optional third argument specifies cpu, used primarily for 1313 * debugging the route table. 1314 */ 1315 if (namelen == 4) { 1316 if (name[3] < 0 || name[3] >= ncpus) 1317 return (EINVAL); 1318 origcpu = mycpuid; 1319 lwkt_migratecpu(name[3]); 1320 } else { 1321 origcpu = -1; 1322 } 1323 crit_enter(); 1324 switch (w.w_op) { 1325 case NET_RT_DUMP: 1326 case NET_RT_FLAGS: 1327 for (i = 1; i <= AF_MAX; i++) 1328 if ((rnh = rt_tables[mycpuid][i]) && 1329 (af == 0 || af == i) && 1330 (error = rnh->rnh_walktree(rnh, 1331 sysctl_dumpentry, &w))) 1332 break; 1333 break; 1334 1335 case NET_RT_IFLIST: 1336 error = sysctl_iflist(af, &w); 1337 } 1338 crit_exit(); 1339 if (w.w_tmem != NULL) 1340 kfree(w.w_tmem, M_RTABLE); 1341 if (origcpu >= 0) 1342 lwkt_migratecpu(origcpu); 1343 return (error); 1344 } 1345 1346 SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, ""); 1347 1348 /* 1349 * Definitions of protocols supported in the ROUTE domain. 1350 */ 1351 1352 static struct domain routedomain; /* or at least forward */ 1353 1354 static struct protosw routesw[] = { 1355 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 1356 0, route_output, raw_ctlinput, 0, 1357 cpu0_soport, 1358 raw_init, 0, 0, 0, 1359 &route_usrreqs 1360 } 1361 }; 1362 1363 static struct domain routedomain = { 1364 PF_ROUTE, "route", NULL, NULL, NULL, 1365 routesw, &routesw[(sizeof routesw)/(sizeof routesw[0])], 1366 }; 1367 1368 DOMAIN_SET(route); 1369 1370