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 1.43 2008/03/07 11:34:19 sephe 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); 152 153 /* 154 * The critical section is necessary to block protocols from sending 155 * error notifications (like RTM_REDIRECT or RTM_LOSING) while 156 * this PCB is extant but incompletely initialized. 157 * Probably we should try to do more of this work beforehand and 158 * eliminate the critical section. 159 */ 160 crit_enter(); 161 so->so_pcb = rp; 162 error = raw_attach(so, proto, ai->sb_rlimit); 163 rp = sotorawcb(so); 164 if (error) { 165 crit_exit(); 166 kfree(rp, M_PCB); 167 return error; 168 } 169 switch(rp->rcb_proto.sp_protocol) { 170 case AF_INET: 171 route_cb.ip_count++; 172 break; 173 case AF_INET6: 174 route_cb.ip6_count++; 175 break; 176 case AF_IPX: 177 route_cb.ipx_count++; 178 break; 179 case AF_NS: 180 route_cb.ns_count++; 181 break; 182 } 183 rp->rcb_faddr = &route_src; 184 route_cb.any_count++; 185 soisconnected(so); 186 so->so_options |= SO_USELOOPBACK; 187 crit_exit(); 188 return 0; 189 } 190 191 static int 192 rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 193 { 194 int error; 195 196 crit_enter(); 197 error = raw_usrreqs.pru_bind(so, nam, td); /* xxx just EINVAL */ 198 crit_exit(); 199 return error; 200 } 201 202 static int 203 rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 204 { 205 int error; 206 207 crit_enter(); 208 error = raw_usrreqs.pru_connect(so, nam, td); /* XXX just EINVAL */ 209 crit_exit(); 210 return error; 211 } 212 213 /* pru_connect2 is EOPNOTSUPP */ 214 /* pru_control is EOPNOTSUPP */ 215 216 static int 217 rts_detach(struct socket *so) 218 { 219 struct rawcb *rp = sotorawcb(so); 220 int error; 221 222 crit_enter(); 223 if (rp != NULL) { 224 switch(rp->rcb_proto.sp_protocol) { 225 case AF_INET: 226 route_cb.ip_count--; 227 break; 228 case AF_INET6: 229 route_cb.ip6_count--; 230 break; 231 case AF_IPX: 232 route_cb.ipx_count--; 233 break; 234 case AF_NS: 235 route_cb.ns_count--; 236 break; 237 } 238 route_cb.any_count--; 239 } 240 error = raw_usrreqs.pru_detach(so); 241 crit_exit(); 242 return error; 243 } 244 245 static int 246 rts_disconnect(struct socket *so) 247 { 248 int error; 249 250 crit_enter(); 251 error = raw_usrreqs.pru_disconnect(so); 252 crit_exit(); 253 return error; 254 } 255 256 /* pru_listen is EOPNOTSUPP */ 257 258 static int 259 rts_peeraddr(struct socket *so, struct sockaddr **nam) 260 { 261 int error; 262 263 crit_enter(); 264 error = raw_usrreqs.pru_peeraddr(so, nam); 265 crit_exit(); 266 return error; 267 } 268 269 /* pru_rcvd is EOPNOTSUPP */ 270 /* pru_rcvoob is EOPNOTSUPP */ 271 272 static int 273 rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 274 struct mbuf *control, struct thread *td) 275 { 276 int error; 277 278 crit_enter(); 279 error = raw_usrreqs.pru_send(so, flags, m, nam, control, td); 280 crit_exit(); 281 return error; 282 } 283 284 /* pru_sense is null */ 285 286 static int 287 rts_shutdown(struct socket *so) 288 { 289 int error; 290 291 crit_enter(); 292 error = raw_usrreqs.pru_shutdown(so); 293 crit_exit(); 294 return error; 295 } 296 297 static int 298 rts_sockaddr(struct socket *so, struct sockaddr **nam) 299 { 300 int error; 301 302 crit_enter(); 303 error = raw_usrreqs.pru_sockaddr(so, nam); 304 crit_exit(); 305 return error; 306 } 307 308 static struct pr_usrreqs route_usrreqs = { 309 .pru_abort = rts_abort, 310 .pru_accept = pru_accept_notsupp, 311 .pru_attach = rts_attach, 312 .pru_bind = rts_bind, 313 .pru_connect = rts_connect, 314 .pru_connect2 = pru_connect2_notsupp, 315 .pru_control = pru_control_notsupp, 316 .pru_detach = rts_detach, 317 .pru_disconnect = rts_disconnect, 318 .pru_listen = pru_listen_notsupp, 319 .pru_peeraddr = rts_peeraddr, 320 .pru_rcvd = pru_rcvd_notsupp, 321 .pru_rcvoob = pru_rcvoob_notsupp, 322 .pru_send = rts_send, 323 .pru_sense = pru_sense_null, 324 .pru_shutdown = rts_shutdown, 325 .pru_sockaddr = rts_sockaddr, 326 .pru_sosend = sosend, 327 .pru_soreceive = soreceive, 328 .pru_sopoll = sopoll 329 }; 330 331 static __inline sa_family_t 332 familyof(struct sockaddr *sa) 333 { 334 return (sa != NULL ? sa->sa_family : 0); 335 } 336 337 /* 338 * Routing socket input function. The packet must be serialized onto cpu 0. 339 * We use the cpu0_soport() netisr processing loop to handle it. 340 * 341 * This looks messy but it means that anyone, including interrupt code, 342 * can send a message to the routing socket. 343 */ 344 static void 345 rts_input_handler(struct netmsg *msg) 346 { 347 static const struct sockaddr route_dst = { 2, PF_ROUTE, }; 348 struct sockproto route_proto; 349 struct netmsg_packet *pmsg; 350 struct mbuf *m; 351 sa_family_t family; 352 353 pmsg = (void *)msg; 354 m = pmsg->nm_packet; 355 family = pmsg->nm_netmsg.nm_lmsg.u.ms_result; 356 route_proto.sp_family = PF_ROUTE; 357 route_proto.sp_protocol = family; 358 359 raw_input(m, &route_proto, &route_src, &route_dst); 360 } 361 362 static void 363 rts_input(struct mbuf *m, sa_family_t family) 364 { 365 struct netmsg_packet *pmsg; 366 lwkt_port_t port; 367 368 port = cpu0_soport(NULL, NULL, NULL, 0); 369 pmsg = &m->m_hdr.mh_netmsg; 370 netmsg_init(&pmsg->nm_netmsg, &netisr_apanic_rport, 371 0, rts_input_handler); 372 pmsg->nm_packet = m; 373 pmsg->nm_netmsg.nm_lmsg.u.ms_result = family; 374 lwkt_sendmsg(port, &pmsg->nm_netmsg.nm_lmsg); 375 } 376 377 static void * 378 reallocbuf(void *ptr, size_t len, size_t olen) 379 { 380 void *newptr; 381 382 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 383 if (newptr == NULL) 384 return NULL; 385 bcopy(ptr, newptr, olen); 386 kfree(ptr, M_RTABLE); 387 return (newptr); 388 } 389 390 /* 391 * Internal helper routine for route_output(). 392 */ 393 static int 394 fillrtmsg(struct rt_msghdr **prtm, struct rtentry *rt, 395 struct rt_addrinfo *rtinfo) 396 { 397 int msglen; 398 struct rt_msghdr *rtm = *prtm; 399 400 /* Fill in rt_addrinfo for call to rt_msg_buffer(). */ 401 rtinfo->rti_dst = rt_key(rt); 402 rtinfo->rti_gateway = rt->rt_gateway; 403 rtinfo->rti_netmask = rt_mask(rt); /* might be NULL */ 404 rtinfo->rti_genmask = rt->rt_genmask; /* might be NULL */ 405 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 406 if (rt->rt_ifp != NULL) { 407 rtinfo->rti_ifpaddr = 408 TAILQ_FIRST(&rt->rt_ifp->if_addrheads[mycpuid]) 409 ->ifa->ifa_addr; 410 rtinfo->rti_ifaaddr = rt->rt_ifa->ifa_addr; 411 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 412 rtinfo->rti_bcastaddr = rt->rt_ifa->ifa_dstaddr; 413 rtm->rtm_index = rt->rt_ifp->if_index; 414 } else { 415 rtinfo->rti_ifpaddr = NULL; 416 rtinfo->rti_ifaaddr = NULL; 417 } 418 } 419 420 msglen = rt_msgsize(rtm->rtm_type, rtinfo); 421 if (rtm->rtm_msglen < msglen) { 422 rtm = reallocbuf(rtm, msglen, rtm->rtm_msglen); 423 if (rtm == NULL) 424 return (ENOBUFS); 425 *prtm = rtm; 426 } 427 rt_msg_buffer(rtm->rtm_type, rtinfo, rtm, msglen); 428 429 rtm->rtm_flags = rt->rt_flags; 430 rtm->rtm_rmx = rt->rt_rmx; 431 rtm->rtm_addrs = rtinfo->rti_addrs; 432 433 return (0); 434 } 435 436 static void route_output_add_callback(int, int, struct rt_addrinfo *, 437 struct rtentry *, void *); 438 static void route_output_delete_callback(int, int, struct rt_addrinfo *, 439 struct rtentry *, void *); 440 static void route_output_change_callback(int, int, struct rt_addrinfo *, 441 struct rtentry *, void *); 442 static void route_output_lock_callback(int, int, struct rt_addrinfo *, 443 struct rtentry *, void *); 444 445 /*ARGSUSED*/ 446 static int 447 route_output(struct mbuf *m, struct socket *so, ...) 448 { 449 struct rt_msghdr *rtm = NULL; 450 struct rtentry *rt; 451 struct radix_node_head *rnh; 452 struct rawcb *rp = NULL; 453 struct pr_output_info *oi; 454 struct rt_addrinfo rtinfo; 455 int len, error = 0; 456 __va_list ap; 457 458 __va_start(ap, so); 459 oi = __va_arg(ap, struct pr_output_info *); 460 __va_end(ap); 461 462 #define gotoerr(e) { error = e; goto flush;} 463 464 if (m == NULL || 465 (m->m_len < sizeof(long) && 466 (m = m_pullup(m, sizeof(long))) == NULL)) 467 return (ENOBUFS); 468 if (!(m->m_flags & M_PKTHDR)) 469 panic("route_output"); 470 len = m->m_pkthdr.len; 471 if (len < sizeof(struct rt_msghdr) || 472 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 473 rtinfo.rti_dst = NULL; 474 gotoerr(EINVAL); 475 } 476 rtm = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 477 if (rtm == NULL) { 478 rtinfo.rti_dst = NULL; 479 gotoerr(ENOBUFS); 480 } 481 m_copydata(m, 0, len, (caddr_t)rtm); 482 if (rtm->rtm_version != RTM_VERSION) { 483 rtinfo.rti_dst = NULL; 484 gotoerr(EPROTONOSUPPORT); 485 } 486 rtm->rtm_pid = oi->p_pid; 487 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 488 rtinfo.rti_addrs = rtm->rtm_addrs; 489 if (rt_xaddrs((char *)(rtm + 1), (char *)rtm + len, &rtinfo) != 0) { 490 rtinfo.rti_dst = NULL; 491 gotoerr(EINVAL); 492 } 493 rtinfo.rti_flags = rtm->rtm_flags; 494 if (rtinfo.rti_dst == NULL || rtinfo.rti_dst->sa_family >= AF_MAX || 495 (rtinfo.rti_gateway && rtinfo.rti_gateway->sa_family >= AF_MAX)) 496 gotoerr(EINVAL); 497 498 if (rtinfo.rti_genmask != NULL) { 499 struct radix_node *n; 500 501 #define clen(s) (*(u_char *)(s)) 502 n = rn_addmask((char *)rtinfo.rti_genmask, TRUE, 1); 503 if (n != NULL && 504 rtinfo.rti_genmask->sa_len >= clen(n->rn_key) && 505 bcmp((char *)rtinfo.rti_genmask + 1, 506 (char *)n->rn_key + 1, clen(n->rn_key) - 1) == 0) 507 rtinfo.rti_genmask = (struct sockaddr *)n->rn_key; 508 else 509 gotoerr(ENOBUFS); 510 } 511 512 /* 513 * Verify that the caller has the appropriate privilege; RTM_GET 514 * is the only operation the non-superuser is allowed. 515 */ 516 if (rtm->rtm_type != RTM_GET && suser_cred(so->so_cred, 0) != 0) 517 gotoerr(EPERM); 518 519 switch (rtm->rtm_type) { 520 case RTM_ADD: 521 if (rtinfo.rti_gateway == NULL) { 522 error = EINVAL; 523 } else { 524 error = rtrequest1_global(RTM_ADD, &rtinfo, 525 route_output_add_callback, rtm); 526 } 527 break; 528 case RTM_DELETE: 529 /* 530 * note: &rtm passed as argument so 'rtm' can be replaced. 531 */ 532 error = rtrequest1_global(RTM_DELETE, &rtinfo, 533 route_output_delete_callback, &rtm); 534 break; 535 case RTM_GET: 536 rnh = rt_tables[mycpuid][rtinfo.rti_dst->sa_family]; 537 if (rnh == NULL) { 538 error = EAFNOSUPPORT; 539 break; 540 } 541 rt = (struct rtentry *) 542 rnh->rnh_lookup((char *)rtinfo.rti_dst, 543 (char *)rtinfo.rti_netmask, rnh); 544 if (rt == NULL) { 545 error = ESRCH; 546 break; 547 } 548 rt->rt_refcnt++; 549 if (fillrtmsg(&rtm, rt, &rtinfo) != 0) 550 gotoerr(ENOBUFS); 551 --rt->rt_refcnt; 552 break; 553 case RTM_CHANGE: 554 error = rtrequest1_global(RTM_GET, &rtinfo, 555 route_output_change_callback, rtm); 556 break; 557 case RTM_LOCK: 558 error = rtrequest1_global(RTM_GET, &rtinfo, 559 route_output_lock_callback, rtm); 560 break; 561 default: 562 error = EOPNOTSUPP; 563 break; 564 } 565 566 flush: 567 if (rtm != NULL) { 568 if (error != 0) 569 rtm->rtm_errno = error; 570 else 571 rtm->rtm_flags |= RTF_DONE; 572 } 573 574 /* 575 * Check to see if we don't want our own messages. 576 */ 577 if (!(so->so_options & SO_USELOOPBACK)) { 578 if (route_cb.any_count <= 1) { 579 if (rtm != NULL) 580 kfree(rtm, M_RTABLE); 581 m_freem(m); 582 return (error); 583 } 584 /* There is another listener, so construct message */ 585 rp = sotorawcb(so); 586 } 587 if (rtm != NULL) { 588 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 589 if (m->m_pkthdr.len < rtm->rtm_msglen) { 590 m_freem(m); 591 m = NULL; 592 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 593 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 594 kfree(rtm, M_RTABLE); 595 } 596 if (rp != NULL) 597 rp->rcb_proto.sp_family = 0; /* Avoid us */ 598 if (m != NULL) 599 rts_input(m, familyof(rtinfo.rti_dst)); 600 if (rp != NULL) 601 rp->rcb_proto.sp_family = PF_ROUTE; 602 return (error); 603 } 604 605 static void 606 route_output_add_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 607 struct rtentry *rt, void *arg) 608 { 609 struct rt_msghdr *rtm = arg; 610 611 if (error == 0 && rt != NULL) { 612 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 613 &rt->rt_rmx); 614 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 615 rt->rt_rmx.rmx_locks |= 616 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 617 rt->rt_genmask = rtinfo->rti_genmask; 618 } 619 } 620 621 static void 622 route_output_delete_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 623 struct rtentry *rt, void *arg) 624 { 625 struct rt_msghdr **rtm = arg; 626 627 if (error == 0 && rt) { 628 ++rt->rt_refcnt; 629 if (fillrtmsg(rtm, rt, rtinfo) != 0) { 630 error = ENOBUFS; 631 /* XXX no way to return the error */ 632 } 633 --rt->rt_refcnt; 634 } 635 } 636 637 static void 638 route_output_change_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 639 struct rtentry *rt, void *arg) 640 { 641 struct rt_msghdr *rtm = arg; 642 struct ifaddr *ifa; 643 644 if (error) 645 goto done; 646 647 /* 648 * new gateway could require new ifaddr, ifp; 649 * flags may also be different; ifp may be specified 650 * by ll sockaddr when protocol address is ambiguous 651 */ 652 if (((rt->rt_flags & RTF_GATEWAY) && rtinfo->rti_gateway != NULL) || 653 rtinfo->rti_ifpaddr != NULL || (rtinfo->rti_ifaaddr != NULL && 654 sa_equal(rtinfo->rti_ifaaddr, rt->rt_ifa->ifa_addr)) 655 ) { 656 error = rt_getifa(rtinfo); 657 if (error != 0) 658 goto done; 659 } 660 if (rtinfo->rti_gateway != NULL) { 661 error = rt_setgate(rt, rt_key(rt), rtinfo->rti_gateway); 662 if (error != 0) 663 goto done; 664 } 665 if ((ifa = rtinfo->rti_ifa) != NULL) { 666 struct ifaddr *oifa = rt->rt_ifa; 667 668 if (oifa != ifa) { 669 if (oifa && oifa->ifa_rtrequest) 670 oifa->ifa_rtrequest(RTM_DELETE, rt, rtinfo); 671 IFAFREE(rt->rt_ifa); 672 IFAREF(ifa); 673 rt->rt_ifa = ifa; 674 rt->rt_ifp = rtinfo->rti_ifp; 675 } 676 } 677 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, &rt->rt_rmx); 678 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 679 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, rtinfo); 680 if (rtinfo->rti_genmask != NULL) 681 rt->rt_genmask = rtinfo->rti_genmask; 682 done: 683 /* XXX no way to return error */ 684 ; 685 } 686 687 static void 688 route_output_lock_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 689 struct rtentry *rt, void *arg) 690 { 691 struct rt_msghdr *rtm = arg; 692 693 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 694 rt->rt_rmx.rmx_locks |= 695 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 696 } 697 698 static void 699 rt_setmetrics(u_long which, struct rt_metrics *in, struct rt_metrics *out) 700 { 701 #define setmetric(flag, elt) if (which & (flag)) out->elt = in->elt; 702 setmetric(RTV_RPIPE, rmx_recvpipe); 703 setmetric(RTV_SPIPE, rmx_sendpipe); 704 setmetric(RTV_SSTHRESH, rmx_ssthresh); 705 setmetric(RTV_RTT, rmx_rtt); 706 setmetric(RTV_RTTVAR, rmx_rttvar); 707 setmetric(RTV_HOPCOUNT, rmx_hopcount); 708 setmetric(RTV_MTU, rmx_mtu); 709 setmetric(RTV_EXPIRE, rmx_expire); 710 #undef setmetric 711 } 712 713 #define ROUNDUP(a) \ 714 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 715 716 /* 717 * Extract the addresses of the passed sockaddrs. 718 * Do a little sanity checking so as to avoid bad memory references. 719 * This data is derived straight from userland. 720 */ 721 static int 722 rt_xaddrs(char *cp, char *cplim, struct rt_addrinfo *rtinfo) 723 { 724 struct sockaddr *sa; 725 int i; 726 727 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 728 if ((rtinfo->rti_addrs & (1 << i)) == 0) 729 continue; 730 sa = (struct sockaddr *)cp; 731 /* 732 * It won't fit. 733 */ 734 if ((cp + sa->sa_len) > cplim) { 735 return (EINVAL); 736 } 737 738 /* 739 * There are no more... Quit now. 740 * If there are more bits, they are in error. 741 * I've seen this. route(1) can evidently generate these. 742 * This causes kernel to core dump. 743 * For compatibility, if we see this, point to a safe address. 744 */ 745 if (sa->sa_len == 0) { 746 static struct sockaddr sa_zero = { 747 sizeof sa_zero, AF_INET, 748 }; 749 750 rtinfo->rti_info[i] = &sa_zero; 751 return (0); /* should be EINVAL but for compat */ 752 } 753 754 /* Accept the sockaddr. */ 755 rtinfo->rti_info[i] = sa; 756 cp += ROUNDUP(sa->sa_len); 757 } 758 return (0); 759 } 760 761 static int 762 rt_msghdrsize(int type) 763 { 764 switch (type) { 765 case RTM_DELADDR: 766 case RTM_NEWADDR: 767 return sizeof(struct ifa_msghdr); 768 case RTM_DELMADDR: 769 case RTM_NEWMADDR: 770 return sizeof(struct ifma_msghdr); 771 case RTM_IFINFO: 772 return sizeof(struct if_msghdr); 773 case RTM_IFANNOUNCE: 774 case RTM_IEEE80211: 775 return sizeof(struct if_announcemsghdr); 776 default: 777 return sizeof(struct rt_msghdr); 778 } 779 } 780 781 static int 782 rt_msgsize(int type, struct rt_addrinfo *rtinfo) 783 { 784 int len, i; 785 786 len = rt_msghdrsize(type); 787 for (i = 0; i < RTAX_MAX; i++) { 788 if (rtinfo->rti_info[i] != NULL) 789 len += ROUNDUP(rtinfo->rti_info[i]->sa_len); 790 } 791 len = ALIGN(len); 792 return len; 793 } 794 795 /* 796 * Build a routing message in a buffer. 797 * Copy the addresses in the rtinfo->rti_info[] sockaddr array 798 * to the end of the buffer after the message header. 799 * 800 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[]. 801 * This side-effect can be avoided if we reorder the addrs bitmask field in all 802 * the route messages to line up so we can set it here instead of back in the 803 * calling routine. 804 */ 805 static void 806 rt_msg_buffer(int type, struct rt_addrinfo *rtinfo, void *buf, int msglen) 807 { 808 struct rt_msghdr *rtm; 809 char *cp; 810 int dlen, i; 811 812 rtm = (struct rt_msghdr *) buf; 813 rtm->rtm_version = RTM_VERSION; 814 rtm->rtm_type = type; 815 rtm->rtm_msglen = msglen; 816 817 cp = (char *)buf + rt_msghdrsize(type); 818 rtinfo->rti_addrs = 0; 819 for (i = 0; i < RTAX_MAX; i++) { 820 struct sockaddr *sa; 821 822 if ((sa = rtinfo->rti_info[i]) == NULL) 823 continue; 824 rtinfo->rti_addrs |= (1 << i); 825 dlen = ROUNDUP(sa->sa_len); 826 bcopy(sa, cp, dlen); 827 cp += dlen; 828 } 829 } 830 831 /* 832 * Build a routing message in a mbuf chain. 833 * Copy the addresses in the rtinfo->rti_info[] sockaddr array 834 * to the end of the mbuf after the message header. 835 * 836 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[]. 837 * This side-effect can be avoided if we reorder the addrs bitmask field in all 838 * the route messages to line up so we can set it here instead of back in the 839 * calling routine. 840 */ 841 static struct mbuf * 842 rt_msg_mbuf(int type, struct rt_addrinfo *rtinfo) 843 { 844 struct mbuf *m; 845 struct rt_msghdr *rtm; 846 int hlen, len; 847 int i; 848 849 hlen = rt_msghdrsize(type); 850 KASSERT(hlen <= MCLBYTES, ("rt_msg_mbuf: hlen %d doesn't fit", hlen)); 851 852 m = m_getl(hlen, MB_DONTWAIT, MT_DATA, M_PKTHDR, NULL); 853 if (m == NULL) 854 return (NULL); 855 mbuftrackid(m, 32); 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 = 965 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr; 966 rtinfo.rti_netmask = ifa->ifa_netmask; 967 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr; 968 969 m = rt_msg_mbuf(cmd, &rtinfo); 970 if (m == NULL) 971 return; 972 973 ifam = mtod(m, struct ifa_msghdr *); 974 ifam->ifam_index = ifp->if_index; 975 ifam->ifam_metric = ifa->ifa_metric; 976 ifam->ifam_flags = ifa->ifa_flags; 977 ifam->ifam_addrs = rtinfo.rti_addrs; 978 979 rts_input(m, familyof(ifa->ifa_addr)); 980 } 981 982 void 983 rt_rtmsg(int cmd, struct rtentry *rt, struct ifnet *ifp, int error) 984 { 985 struct rt_msghdr *rtm; 986 struct rt_addrinfo rtinfo; 987 struct mbuf *m; 988 struct sockaddr *dst; 989 990 if (rt == NULL) 991 return; 992 993 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 994 rtinfo.rti_dst = dst = rt_key(rt); 995 rtinfo.rti_gateway = rt->rt_gateway; 996 rtinfo.rti_netmask = rt_mask(rt); 997 if (ifp != NULL) { 998 rtinfo.rti_ifpaddr = 999 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr; 1000 } 1001 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr; 1002 1003 m = rt_msg_mbuf(cmd, &rtinfo); 1004 if (m == NULL) 1005 return; 1006 1007 rtm = mtod(m, struct rt_msghdr *); 1008 if (ifp != NULL) 1009 rtm->rtm_index = ifp->if_index; 1010 rtm->rtm_flags |= rt->rt_flags; 1011 rtm->rtm_errno = error; 1012 rtm->rtm_addrs = rtinfo.rti_addrs; 1013 1014 rts_input(m, familyof(dst)); 1015 } 1016 1017 /* 1018 * This is called to generate messages from the routing socket 1019 * indicating a network interface has had addresses associated with it. 1020 * if we ever reverse the logic and replace messages TO the routing 1021 * socket indicate a request to configure interfaces, then it will 1022 * be unnecessary as the routing socket will automatically generate 1023 * copies of it. 1024 */ 1025 void 1026 rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt) 1027 { 1028 #ifdef SCTP 1029 /* 1030 * notify the SCTP stack 1031 * this will only get called when an address is added/deleted 1032 * XXX pass the ifaddr struct instead if ifa->ifa_addr... 1033 */ 1034 if (cmd == RTM_ADD) 1035 sctp_add_ip_address(ifa); 1036 else if (cmd == RTM_DELETE) 1037 sctp_delete_ip_address(ifa); 1038 #endif /* SCTP */ 1039 1040 if (route_cb.any_count == 0) 1041 return; 1042 1043 if (cmd == RTM_ADD) { 1044 rt_ifamsg(RTM_NEWADDR, ifa); 1045 rt_rtmsg(RTM_ADD, rt, ifa->ifa_ifp, error); 1046 } else { 1047 KASSERT((cmd == RTM_DELETE), ("unknown cmd %d", cmd)); 1048 rt_rtmsg(RTM_DELETE, rt, ifa->ifa_ifp, error); 1049 rt_ifamsg(RTM_DELADDR, ifa); 1050 } 1051 } 1052 1053 /* 1054 * This is the analogue to the rt_newaddrmsg which performs the same 1055 * function but for multicast group memberhips. This is easier since 1056 * there is no route state to worry about. 1057 */ 1058 void 1059 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma) 1060 { 1061 struct rt_addrinfo rtinfo; 1062 struct mbuf *m = NULL; 1063 struct ifnet *ifp = ifma->ifma_ifp; 1064 struct ifma_msghdr *ifmam; 1065 1066 if (route_cb.any_count == 0) 1067 return; 1068 1069 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1070 rtinfo.rti_ifaaddr = ifma->ifma_addr; 1071 if (ifp != NULL && !TAILQ_EMPTY(&ifp->if_addrheads[mycpuid])) { 1072 rtinfo.rti_ifpaddr = 1073 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr; 1074 } 1075 /* 1076 * If a link-layer address is present, present it as a ``gateway'' 1077 * (similarly to how ARP entries, e.g., are presented). 1078 */ 1079 rtinfo.rti_gateway = ifma->ifma_lladdr; 1080 1081 m = rt_msg_mbuf(cmd, &rtinfo); 1082 if (m == NULL) 1083 return; 1084 1085 ifmam = mtod(m, struct ifma_msghdr *); 1086 ifmam->ifmam_index = ifp->if_index; 1087 ifmam->ifmam_addrs = rtinfo.rti_addrs; 1088 1089 rts_input(m, familyof(ifma->ifma_addr)); 1090 } 1091 1092 static struct mbuf * 1093 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1094 struct rt_addrinfo *info) 1095 { 1096 struct if_announcemsghdr *ifan; 1097 struct mbuf *m; 1098 1099 if (route_cb.any_count == 0) 1100 return NULL; 1101 1102 bzero(info, sizeof(*info)); 1103 m = rt_msg_mbuf(type, info); 1104 if (m == NULL) 1105 return NULL; 1106 1107 ifan = mtod(m, struct if_announcemsghdr *); 1108 ifan->ifan_index = ifp->if_index; 1109 strlcpy(ifan->ifan_name, ifp->if_xname, sizeof ifan->ifan_name); 1110 ifan->ifan_what = what; 1111 return m; 1112 } 1113 1114 /* 1115 * This is called to generate routing socket messages indicating 1116 * IEEE80211 wireless events. 1117 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1118 */ 1119 void 1120 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len) 1121 { 1122 struct rt_addrinfo info; 1123 struct mbuf *m; 1124 1125 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1126 if (m == NULL) 1127 return; 1128 1129 /* 1130 * Append the ieee80211 data. Try to stick it in the 1131 * mbuf containing the ifannounce msg; otherwise allocate 1132 * a new mbuf and append. 1133 * 1134 * NB: we assume m is a single mbuf. 1135 */ 1136 if (data_len > M_TRAILINGSPACE(m)) { 1137 struct mbuf *n = m_get(MB_DONTWAIT, MT_DATA); 1138 if (n == NULL) { 1139 m_freem(m); 1140 return; 1141 } 1142 bcopy(data, mtod(n, void *), data_len); 1143 n->m_len = data_len; 1144 m->m_next = n; 1145 } else if (data_len > 0) { 1146 bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len); 1147 m->m_len += data_len; 1148 } 1149 mbuftrackid(m, 33); 1150 if (m->m_flags & M_PKTHDR) 1151 m->m_pkthdr.len += data_len; 1152 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len; 1153 rts_input(m, 0); 1154 } 1155 1156 /* 1157 * This is called to generate routing socket messages indicating 1158 * network interface arrival and departure. 1159 */ 1160 void 1161 rt_ifannouncemsg(struct ifnet *ifp, int what) 1162 { 1163 struct rt_addrinfo addrinfo; 1164 struct mbuf *m; 1165 1166 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &addrinfo); 1167 if (m != NULL) 1168 rts_input(m, 0); 1169 } 1170 1171 static int 1172 resizewalkarg(struct walkarg *w, int len) 1173 { 1174 void *newptr; 1175 1176 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 1177 if (newptr == NULL) 1178 return (ENOMEM); 1179 if (w->w_tmem != NULL) 1180 kfree(w->w_tmem, M_RTABLE); 1181 w->w_tmem = newptr; 1182 w->w_tmemsize = len; 1183 return (0); 1184 } 1185 1186 /* 1187 * This is used in dumping the kernel table via sysctl(). 1188 */ 1189 int 1190 sysctl_dumpentry(struct radix_node *rn, void *vw) 1191 { 1192 struct walkarg *w = vw; 1193 struct rtentry *rt = (struct rtentry *)rn; 1194 struct rt_addrinfo rtinfo; 1195 int error, msglen; 1196 1197 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1198 return 0; 1199 1200 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1201 rtinfo.rti_dst = rt_key(rt); 1202 rtinfo.rti_gateway = rt->rt_gateway; 1203 rtinfo.rti_netmask = rt_mask(rt); 1204 rtinfo.rti_genmask = rt->rt_genmask; 1205 if (rt->rt_ifp != NULL) { 1206 rtinfo.rti_ifpaddr = 1207 TAILQ_FIRST(&rt->rt_ifp->if_addrheads[mycpuid])->ifa->ifa_addr; 1208 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr; 1209 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1210 rtinfo.rti_bcastaddr = rt->rt_ifa->ifa_dstaddr; 1211 } 1212 msglen = rt_msgsize(RTM_GET, &rtinfo); 1213 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0) 1214 return (ENOMEM); 1215 rt_msg_buffer(RTM_GET, &rtinfo, w->w_tmem, msglen); 1216 if (w->w_req != NULL) { 1217 struct rt_msghdr *rtm = w->w_tmem; 1218 1219 rtm->rtm_flags = rt->rt_flags; 1220 rtm->rtm_use = rt->rt_use; 1221 rtm->rtm_rmx = rt->rt_rmx; 1222 rtm->rtm_index = rt->rt_ifp->if_index; 1223 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1224 rtm->rtm_addrs = rtinfo.rti_addrs; 1225 error = SYSCTL_OUT(w->w_req, rtm, msglen); 1226 return (error); 1227 } 1228 return (0); 1229 } 1230 1231 static int 1232 sysctl_iflist(int af, struct walkarg *w) 1233 { 1234 struct ifnet *ifp; 1235 struct rt_addrinfo rtinfo; 1236 int msglen, error; 1237 1238 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1239 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1240 struct ifaddr_container *ifac; 1241 struct ifaddr *ifa; 1242 1243 if (w->w_arg && w->w_arg != ifp->if_index) 1244 continue; 1245 ifac = TAILQ_FIRST(&ifp->if_addrheads[mycpuid]); 1246 ifa = ifac->ifa; 1247 rtinfo.rti_ifpaddr = ifa->ifa_addr; 1248 msglen = rt_msgsize(RTM_IFINFO, &rtinfo); 1249 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0) 1250 return (ENOMEM); 1251 rt_msg_buffer(RTM_IFINFO, &rtinfo, w->w_tmem, msglen); 1252 rtinfo.rti_ifpaddr = NULL; 1253 if (w->w_req != NULL && w->w_tmem != NULL) { 1254 struct if_msghdr *ifm = w->w_tmem; 1255 1256 ifm->ifm_index = ifp->if_index; 1257 ifm->ifm_flags = ifp->if_flags; 1258 ifm->ifm_data = ifp->if_data; 1259 ifm->ifm_addrs = rtinfo.rti_addrs; 1260 error = SYSCTL_OUT(w->w_req, ifm, msglen); 1261 if (error) 1262 return (error); 1263 } 1264 while ((ifac = TAILQ_NEXT(ifac, ifa_link)) != NULL) { 1265 ifa = ifac->ifa; 1266 1267 if (af && af != ifa->ifa_addr->sa_family) 1268 continue; 1269 if (curproc->p_ucred->cr_prison && 1270 prison_if(curproc->p_ucred, ifa->ifa_addr)) 1271 continue; 1272 rtinfo.rti_ifaaddr = ifa->ifa_addr; 1273 rtinfo.rti_netmask = ifa->ifa_netmask; 1274 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr; 1275 msglen = rt_msgsize(RTM_NEWADDR, &rtinfo); 1276 if (w->w_tmemsize < msglen && 1277 resizewalkarg(w, msglen) != 0) 1278 return (ENOMEM); 1279 rt_msg_buffer(RTM_NEWADDR, &rtinfo, w->w_tmem, msglen); 1280 if (w->w_req != NULL) { 1281 struct ifa_msghdr *ifam = w->w_tmem; 1282 1283 ifam->ifam_index = ifa->ifa_ifp->if_index; 1284 ifam->ifam_flags = ifa->ifa_flags; 1285 ifam->ifam_metric = ifa->ifa_metric; 1286 ifam->ifam_addrs = rtinfo.rti_addrs; 1287 error = SYSCTL_OUT(w->w_req, w->w_tmem, msglen); 1288 if (error) 1289 return (error); 1290 } 1291 } 1292 rtinfo.rti_netmask = NULL; 1293 rtinfo.rti_ifaaddr = NULL; 1294 rtinfo.rti_bcastaddr = NULL; 1295 } 1296 return (0); 1297 } 1298 1299 static int 1300 sysctl_rtsock(SYSCTL_HANDLER_ARGS) 1301 { 1302 int *name = (int *)arg1; 1303 u_int namelen = arg2; 1304 struct radix_node_head *rnh; 1305 int i, error = EINVAL; 1306 int origcpu; 1307 u_char af; 1308 struct walkarg w; 1309 1310 name ++; 1311 namelen--; 1312 if (req->newptr) 1313 return (EPERM); 1314 if (namelen != 3 && namelen != 4) 1315 return (EINVAL); 1316 af = name[0]; 1317 bzero(&w, sizeof w); 1318 w.w_op = name[1]; 1319 w.w_arg = name[2]; 1320 w.w_req = req; 1321 1322 /* 1323 * Optional third argument specifies cpu, used primarily for 1324 * debugging the route table. 1325 */ 1326 if (namelen == 4) { 1327 if (name[3] < 0 || name[3] >= ncpus) 1328 return (EINVAL); 1329 origcpu = mycpuid; 1330 lwkt_migratecpu(name[3]); 1331 } else { 1332 origcpu = -1; 1333 } 1334 crit_enter(); 1335 switch (w.w_op) { 1336 case NET_RT_DUMP: 1337 case NET_RT_FLAGS: 1338 for (i = 1; i <= AF_MAX; i++) 1339 if ((rnh = rt_tables[mycpuid][i]) && 1340 (af == 0 || af == i) && 1341 (error = rnh->rnh_walktree(rnh, 1342 sysctl_dumpentry, &w))) 1343 break; 1344 break; 1345 1346 case NET_RT_IFLIST: 1347 error = sysctl_iflist(af, &w); 1348 } 1349 crit_exit(); 1350 if (w.w_tmem != NULL) 1351 kfree(w.w_tmem, M_RTABLE); 1352 if (origcpu >= 0) 1353 lwkt_migratecpu(origcpu); 1354 return (error); 1355 } 1356 1357 SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, ""); 1358 1359 /* 1360 * Definitions of protocols supported in the ROUTE domain. 1361 */ 1362 1363 static struct domain routedomain; /* or at least forward */ 1364 1365 static struct protosw routesw[] = { 1366 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 1367 0, route_output, raw_ctlinput, 0, 1368 cpu0_soport, 1369 raw_init, 0, 0, 0, 1370 &route_usrreqs 1371 } 1372 }; 1373 1374 static struct domain routedomain = { 1375 PF_ROUTE, "route", NULL, NULL, NULL, 1376 routesw, &routesw[(sizeof routesw)/(sizeof routesw[0])], 1377 }; 1378 1379 DOMAIN_SET(route); 1380 1381