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 1.37 2007/03/04 18:51:59 swildner 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 89 #ifdef SCTP 90 extern void sctp_add_ip_address(struct ifaddr *ifa); 91 extern void sctp_delete_ip_address(struct ifaddr *ifa); 92 #endif /* SCTP */ 93 94 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables"); 95 96 static struct route_cb { 97 int ip_count; 98 int ip6_count; 99 int ipx_count; 100 int ns_count; 101 int any_count; 102 } route_cb; 103 104 static const struct sockaddr route_src = { 2, PF_ROUTE, }; 105 106 struct walkarg { 107 int w_tmemsize; 108 int w_op, w_arg; 109 void *w_tmem; 110 struct sysctl_req *w_req; 111 }; 112 113 static struct mbuf * 114 rt_msg_mbuf (int, struct rt_addrinfo *); 115 static void rt_msg_buffer (int, struct rt_addrinfo *, void *buf, int len); 116 static int rt_msgsize (int type, struct rt_addrinfo *rtinfo); 117 static int rt_xaddrs (char *, char *, struct rt_addrinfo *); 118 static int sysctl_dumpentry (struct radix_node *rn, void *vw); 119 static int sysctl_iflist (int af, struct walkarg *w); 120 static int route_output(struct mbuf *, struct socket *, ...); 121 static void rt_setmetrics (u_long, struct rt_metrics *, 122 struct rt_metrics *); 123 124 /* 125 * It really doesn't make any sense at all for this code to share much 126 * with raw_usrreq.c, since its functionality is so restricted. XXX 127 */ 128 static int 129 rts_abort(struct socket *so) 130 { 131 int error; 132 133 crit_enter(); 134 error = raw_usrreqs.pru_abort(so); 135 crit_exit(); 136 return error; 137 } 138 139 /* pru_accept is EOPNOTSUPP */ 140 141 static int 142 rts_attach(struct socket *so, int proto, struct pru_attach_info *ai) 143 { 144 struct rawcb *rp; 145 int error; 146 147 if (sotorawcb(so) != NULL) 148 return EISCONN; /* XXX panic? */ 149 150 rp = kmalloc(sizeof *rp, M_PCB, M_WAITOK | M_ZERO); 151 if (rp == NULL) 152 return ENOBUFS; 153 154 /* 155 * The critical section is necessary to block protocols from sending 156 * error notifications (like RTM_REDIRECT or RTM_LOSING) while 157 * this PCB is extant but incompletely initialized. 158 * Probably we should try to do more of this work beforehand and 159 * eliminate the critical section. 160 */ 161 crit_enter(); 162 so->so_pcb = rp; 163 error = raw_attach(so, proto, ai->sb_rlimit); 164 rp = sotorawcb(so); 165 if (error) { 166 crit_exit(); 167 kfree(rp, M_PCB); 168 return error; 169 } 170 switch(rp->rcb_proto.sp_protocol) { 171 case AF_INET: 172 route_cb.ip_count++; 173 break; 174 case AF_INET6: 175 route_cb.ip6_count++; 176 break; 177 case AF_IPX: 178 route_cb.ipx_count++; 179 break; 180 case AF_NS: 181 route_cb.ns_count++; 182 break; 183 } 184 rp->rcb_faddr = &route_src; 185 route_cb.any_count++; 186 soisconnected(so); 187 so->so_options |= SO_USELOOPBACK; 188 crit_exit(); 189 return 0; 190 } 191 192 static int 193 rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 194 { 195 int error; 196 197 crit_enter(); 198 error = raw_usrreqs.pru_bind(so, nam, td); /* xxx just EINVAL */ 199 crit_exit(); 200 return error; 201 } 202 203 static int 204 rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 205 { 206 int error; 207 208 crit_enter(); 209 error = raw_usrreqs.pru_connect(so, nam, td); /* XXX just EINVAL */ 210 crit_exit(); 211 return error; 212 } 213 214 /* pru_connect2 is EOPNOTSUPP */ 215 /* pru_control is EOPNOTSUPP */ 216 217 static int 218 rts_detach(struct socket *so) 219 { 220 struct rawcb *rp = sotorawcb(so); 221 int error; 222 223 crit_enter(); 224 if (rp != NULL) { 225 switch(rp->rcb_proto.sp_protocol) { 226 case AF_INET: 227 route_cb.ip_count--; 228 break; 229 case AF_INET6: 230 route_cb.ip6_count--; 231 break; 232 case AF_IPX: 233 route_cb.ipx_count--; 234 break; 235 case AF_NS: 236 route_cb.ns_count--; 237 break; 238 } 239 route_cb.any_count--; 240 } 241 error = raw_usrreqs.pru_detach(so); 242 crit_exit(); 243 return error; 244 } 245 246 static int 247 rts_disconnect(struct socket *so) 248 { 249 int error; 250 251 crit_enter(); 252 error = raw_usrreqs.pru_disconnect(so); 253 crit_exit(); 254 return error; 255 } 256 257 /* pru_listen is EOPNOTSUPP */ 258 259 static int 260 rts_peeraddr(struct socket *so, struct sockaddr **nam) 261 { 262 int error; 263 264 crit_enter(); 265 error = raw_usrreqs.pru_peeraddr(so, nam); 266 crit_exit(); 267 return error; 268 } 269 270 /* pru_rcvd is EOPNOTSUPP */ 271 /* pru_rcvoob is EOPNOTSUPP */ 272 273 static int 274 rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 275 struct mbuf *control, struct thread *td) 276 { 277 int error; 278 279 crit_enter(); 280 error = raw_usrreqs.pru_send(so, flags, m, nam, control, td); 281 crit_exit(); 282 return error; 283 } 284 285 /* pru_sense is null */ 286 287 static int 288 rts_shutdown(struct socket *so) 289 { 290 int error; 291 292 crit_enter(); 293 error = raw_usrreqs.pru_shutdown(so); 294 crit_exit(); 295 return error; 296 } 297 298 static int 299 rts_sockaddr(struct socket *so, struct sockaddr **nam) 300 { 301 int error; 302 303 crit_enter(); 304 error = raw_usrreqs.pru_sockaddr(so, nam); 305 crit_exit(); 306 return error; 307 } 308 309 static struct pr_usrreqs route_usrreqs = { 310 rts_abort, pru_accept_notsupp, rts_attach, rts_bind, rts_connect, 311 pru_connect2_notsupp, pru_control_notsupp, rts_detach, rts_disconnect, 312 pru_listen_notsupp, rts_peeraddr, pru_rcvd_notsupp, pru_rcvoob_notsupp, 313 rts_send, pru_sense_null, rts_shutdown, rts_sockaddr, 314 sosend, soreceive, sopoll 315 }; 316 317 static __inline sa_family_t 318 familyof(struct sockaddr *sa) 319 { 320 return (sa != NULL ? sa->sa_family : 0); 321 } 322 323 static void 324 rts_input(struct mbuf *m, sa_family_t family) 325 { 326 static const struct sockaddr route_dst = { 2, PF_ROUTE, }; 327 struct sockproto route_proto = { PF_ROUTE, family }; 328 329 raw_input(m, &route_proto, &route_src, &route_dst); 330 } 331 332 static void * 333 reallocbuf(void *ptr, size_t len, size_t olen) 334 { 335 void *newptr; 336 337 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 338 if (newptr == NULL) 339 return NULL; 340 bcopy(ptr, newptr, olen); 341 kfree(ptr, M_RTABLE); 342 return (newptr); 343 } 344 345 /* 346 * Internal helper routine for route_output(). 347 */ 348 static int 349 fillrtmsg(struct rt_msghdr **prtm, struct rtentry *rt, 350 struct rt_addrinfo *rtinfo) 351 { 352 int msglen; 353 struct rt_msghdr *rtm = *prtm; 354 355 /* Fill in rt_addrinfo for call to rt_msg_buffer(). */ 356 rtinfo->rti_dst = rt_key(rt); 357 rtinfo->rti_gateway = rt->rt_gateway; 358 rtinfo->rti_netmask = rt_mask(rt); /* might be NULL */ 359 rtinfo->rti_genmask = rt->rt_genmask; /* might be NULL */ 360 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 361 if (rt->rt_ifp != NULL) { 362 rtinfo->rti_ifpaddr = 363 TAILQ_FIRST(&rt->rt_ifp->if_addrhead)->ifa_addr; 364 rtinfo->rti_ifaaddr = rt->rt_ifa->ifa_addr; 365 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 366 rtinfo->rti_bcastaddr = rt->rt_ifa->ifa_dstaddr; 367 rtm->rtm_index = rt->rt_ifp->if_index; 368 } else { 369 rtinfo->rti_ifpaddr = NULL; 370 rtinfo->rti_ifaaddr = NULL; 371 } 372 } 373 374 msglen = rt_msgsize(rtm->rtm_type, rtinfo); 375 if (rtm->rtm_msglen < msglen) { 376 rtm = reallocbuf(rtm, msglen, rtm->rtm_msglen); 377 if (rtm == NULL) 378 return (ENOBUFS); 379 *prtm = rtm; 380 } 381 rt_msg_buffer(rtm->rtm_type, rtinfo, rtm, msglen); 382 383 rtm->rtm_flags = rt->rt_flags; 384 rtm->rtm_rmx = rt->rt_rmx; 385 rtm->rtm_addrs = rtinfo->rti_addrs; 386 387 return (0); 388 } 389 390 static void route_output_add_callback(int, int, struct rt_addrinfo *, 391 struct rtentry *, void *); 392 static void route_output_delete_callback(int, int, struct rt_addrinfo *, 393 struct rtentry *, void *); 394 static void route_output_change_callback(int, int, struct rt_addrinfo *, 395 struct rtentry *, void *); 396 static void route_output_lock_callback(int, int, struct rt_addrinfo *, 397 struct rtentry *, void *); 398 399 /*ARGSUSED*/ 400 static int 401 route_output(struct mbuf *m, struct socket *so, ...) 402 { 403 struct rt_msghdr *rtm = NULL; 404 struct rtentry *rt; 405 struct radix_node_head *rnh; 406 struct rawcb *rp = NULL; 407 struct pr_output_info *oi; 408 struct rt_addrinfo rtinfo; 409 int len, error = 0; 410 __va_list ap; 411 412 __va_start(ap, so); 413 oi = __va_arg(ap, struct pr_output_info *); 414 __va_end(ap); 415 416 #define gotoerr(e) { error = e; goto flush;} 417 418 if (m == NULL || 419 (m->m_len < sizeof(long) && 420 (m = m_pullup(m, sizeof(long))) == NULL)) 421 return (ENOBUFS); 422 if (!(m->m_flags & M_PKTHDR)) 423 panic("route_output"); 424 len = m->m_pkthdr.len; 425 if (len < sizeof(struct rt_msghdr) || 426 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 427 rtinfo.rti_dst = NULL; 428 gotoerr(EINVAL); 429 } 430 rtm = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 431 if (rtm == NULL) { 432 rtinfo.rti_dst = NULL; 433 gotoerr(ENOBUFS); 434 } 435 m_copydata(m, 0, len, (caddr_t)rtm); 436 if (rtm->rtm_version != RTM_VERSION) { 437 rtinfo.rti_dst = NULL; 438 gotoerr(EPROTONOSUPPORT); 439 } 440 rtm->rtm_pid = oi->p_pid; 441 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 442 rtinfo.rti_addrs = rtm->rtm_addrs; 443 if (rt_xaddrs((char *)(rtm + 1), (char *)rtm + len, &rtinfo) != 0) { 444 rtinfo.rti_dst = NULL; 445 gotoerr(EINVAL); 446 } 447 rtinfo.rti_flags = rtm->rtm_flags; 448 if (rtinfo.rti_dst == NULL || rtinfo.rti_dst->sa_family >= AF_MAX || 449 (rtinfo.rti_gateway && rtinfo.rti_gateway->sa_family >= AF_MAX)) 450 gotoerr(EINVAL); 451 452 if (rtinfo.rti_genmask != NULL) { 453 struct radix_node *n; 454 455 #define clen(s) (*(u_char *)(s)) 456 n = rn_addmask((char *)rtinfo.rti_genmask, TRUE, 1); 457 if (n != NULL && 458 rtinfo.rti_genmask->sa_len >= clen(n->rn_key) && 459 bcmp((char *)rtinfo.rti_genmask + 1, 460 (char *)n->rn_key + 1, clen(n->rn_key) - 1) == 0) 461 rtinfo.rti_genmask = (struct sockaddr *)n->rn_key; 462 else 463 gotoerr(ENOBUFS); 464 } 465 466 /* 467 * Verify that the caller has the appropriate privilege; RTM_GET 468 * is the only operation the non-superuser is allowed. 469 */ 470 if (rtm->rtm_type != RTM_GET && suser_cred(so->so_cred, 0) != 0) 471 gotoerr(EPERM); 472 473 switch (rtm->rtm_type) { 474 case RTM_ADD: 475 if (rtinfo.rti_gateway == NULL) { 476 error = EINVAL; 477 } else { 478 error = rtrequest1_global(RTM_ADD, &rtinfo, 479 route_output_add_callback, rtm); 480 } 481 break; 482 case RTM_DELETE: 483 /* 484 * note: &rtm passed as argument so 'rtm' can be replaced. 485 */ 486 error = rtrequest1_global(RTM_DELETE, &rtinfo, 487 route_output_delete_callback, &rtm); 488 break; 489 case RTM_GET: 490 rnh = rt_tables[mycpuid][rtinfo.rti_dst->sa_family]; 491 if (rnh == NULL) { 492 error = EAFNOSUPPORT; 493 break; 494 } 495 rt = (struct rtentry *) 496 rnh->rnh_lookup((char *)rtinfo.rti_dst, 497 (char *)rtinfo.rti_netmask, rnh); 498 if (rt == NULL) { 499 error = ESRCH; 500 break; 501 } 502 rt->rt_refcnt++; 503 if (fillrtmsg(&rtm, rt, &rtinfo) != 0) 504 gotoerr(ENOBUFS); 505 --rt->rt_refcnt; 506 break; 507 case RTM_CHANGE: 508 error = rtrequest1_global(RTM_GET, &rtinfo, 509 route_output_change_callback, rtm); 510 break; 511 case RTM_LOCK: 512 error = rtrequest1_global(RTM_GET, &rtinfo, 513 route_output_lock_callback, rtm); 514 break; 515 default: 516 error = EOPNOTSUPP; 517 break; 518 } 519 520 flush: 521 if (rtm != NULL) { 522 if (error != 0) 523 rtm->rtm_errno = error; 524 else 525 rtm->rtm_flags |= RTF_DONE; 526 } 527 528 /* 529 * Check to see if we don't want our own messages. 530 */ 531 if (!(so->so_options & SO_USELOOPBACK)) { 532 if (route_cb.any_count <= 1) { 533 if (rtm != NULL) 534 kfree(rtm, M_RTABLE); 535 m_freem(m); 536 return (error); 537 } 538 /* There is another listener, so construct message */ 539 rp = sotorawcb(so); 540 } 541 if (rtm != NULL) { 542 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 543 if (m->m_pkthdr.len < rtm->rtm_msglen) { 544 m_freem(m); 545 m = NULL; 546 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 547 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 548 kfree(rtm, M_RTABLE); 549 } 550 if (rp != NULL) 551 rp->rcb_proto.sp_family = 0; /* Avoid us */ 552 if (m != NULL) 553 rts_input(m, familyof(rtinfo.rti_dst)); 554 if (rp != NULL) 555 rp->rcb_proto.sp_family = PF_ROUTE; 556 return (error); 557 } 558 559 static void 560 route_output_add_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 561 struct rtentry *rt, void *arg) 562 { 563 struct rt_msghdr *rtm = arg; 564 565 if (error == 0 && rt != NULL) { 566 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 567 &rt->rt_rmx); 568 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 569 rt->rt_rmx.rmx_locks |= 570 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 571 rt->rt_genmask = rtinfo->rti_genmask; 572 } 573 } 574 575 static void 576 route_output_delete_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 577 struct rtentry *rt, void *arg) 578 { 579 struct rt_msghdr **rtm = arg; 580 581 if (error == 0 && rt) { 582 ++rt->rt_refcnt; 583 if (fillrtmsg(rtm, rt, rtinfo) != 0) { 584 error = ENOBUFS; 585 /* XXX no way to return the error */ 586 } 587 --rt->rt_refcnt; 588 } 589 } 590 591 static void 592 route_output_change_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 593 struct rtentry *rt, void *arg) 594 { 595 struct rt_msghdr *rtm = arg; 596 struct ifaddr *ifa; 597 598 if (error) 599 goto done; 600 601 /* 602 * new gateway could require new ifaddr, ifp; 603 * flags may also be different; ifp may be specified 604 * by ll sockaddr when protocol address is ambiguous 605 */ 606 if (((rt->rt_flags & RTF_GATEWAY) && rtinfo->rti_gateway != NULL) || 607 rtinfo->rti_ifpaddr != NULL || (rtinfo->rti_ifaaddr != NULL && 608 sa_equal(rtinfo->rti_ifaaddr, rt->rt_ifa->ifa_addr)) 609 ) { 610 error = rt_getifa(rtinfo); 611 if (error != 0) 612 goto done; 613 } 614 if (rtinfo->rti_gateway != NULL) { 615 error = rt_setgate(rt, rt_key(rt), rtinfo->rti_gateway); 616 if (error != 0) 617 goto done; 618 } 619 if ((ifa = rtinfo->rti_ifa) != NULL) { 620 struct ifaddr *oifa = rt->rt_ifa; 621 622 if (oifa != ifa) { 623 if (oifa && oifa->ifa_rtrequest) 624 oifa->ifa_rtrequest(RTM_DELETE, rt, rtinfo); 625 IFAFREE(rt->rt_ifa); 626 IFAREF(ifa); 627 rt->rt_ifa = ifa; 628 rt->rt_ifp = rtinfo->rti_ifp; 629 } 630 } 631 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, &rt->rt_rmx); 632 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 633 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, rtinfo); 634 if (rtinfo->rti_genmask != NULL) 635 rt->rt_genmask = rtinfo->rti_genmask; 636 done: 637 /* XXX no way to return error */ 638 ; 639 } 640 641 static void 642 route_output_lock_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 643 struct rtentry *rt, void *arg) 644 { 645 struct rt_msghdr *rtm = arg; 646 647 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 648 rt->rt_rmx.rmx_locks |= 649 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 650 } 651 652 static void 653 rt_setmetrics(u_long which, struct rt_metrics *in, struct rt_metrics *out) 654 { 655 #define setmetric(flag, elt) if (which & (flag)) out->elt = in->elt; 656 setmetric(RTV_RPIPE, rmx_recvpipe); 657 setmetric(RTV_SPIPE, rmx_sendpipe); 658 setmetric(RTV_SSTHRESH, rmx_ssthresh); 659 setmetric(RTV_RTT, rmx_rtt); 660 setmetric(RTV_RTTVAR, rmx_rttvar); 661 setmetric(RTV_HOPCOUNT, rmx_hopcount); 662 setmetric(RTV_MTU, rmx_mtu); 663 setmetric(RTV_EXPIRE, rmx_expire); 664 #undef setmetric 665 } 666 667 #define ROUNDUP(a) \ 668 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 669 670 /* 671 * Extract the addresses of the passed sockaddrs. 672 * Do a little sanity checking so as to avoid bad memory references. 673 * This data is derived straight from userland. 674 */ 675 static int 676 rt_xaddrs(char *cp, char *cplim, struct rt_addrinfo *rtinfo) 677 { 678 struct sockaddr *sa; 679 int i; 680 681 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 682 if ((rtinfo->rti_addrs & (1 << i)) == 0) 683 continue; 684 sa = (struct sockaddr *)cp; 685 /* 686 * It won't fit. 687 */ 688 if ((cp + sa->sa_len) > cplim) { 689 return (EINVAL); 690 } 691 692 /* 693 * There are no more... Quit now. 694 * If there are more bits, they are in error. 695 * I've seen this. route(1) can evidently generate these. 696 * This causes kernel to core dump. 697 * For compatibility, if we see this, point to a safe address. 698 */ 699 if (sa->sa_len == 0) { 700 static struct sockaddr sa_zero = { 701 sizeof sa_zero, AF_INET, 702 }; 703 704 rtinfo->rti_info[i] = &sa_zero; 705 return (0); /* should be EINVAL but for compat */ 706 } 707 708 /* Accept the sockaddr. */ 709 rtinfo->rti_info[i] = sa; 710 cp += ROUNDUP(sa->sa_len); 711 } 712 return (0); 713 } 714 715 static int 716 rt_msghdrsize(int type) 717 { 718 switch (type) { 719 case RTM_DELADDR: 720 case RTM_NEWADDR: 721 return sizeof(struct ifa_msghdr); 722 case RTM_DELMADDR: 723 case RTM_NEWMADDR: 724 return sizeof(struct ifma_msghdr); 725 case RTM_IFINFO: 726 return sizeof(struct if_msghdr); 727 case RTM_IFANNOUNCE: 728 case RTM_IEEE80211: 729 return sizeof(struct if_announcemsghdr); 730 default: 731 return sizeof(struct rt_msghdr); 732 } 733 } 734 735 static int 736 rt_msgsize(int type, struct rt_addrinfo *rtinfo) 737 { 738 int len, i; 739 740 len = rt_msghdrsize(type); 741 for (i = 0; i < RTAX_MAX; i++) { 742 if (rtinfo->rti_info[i] != NULL) 743 len += ROUNDUP(rtinfo->rti_info[i]->sa_len); 744 } 745 len = ALIGN(len); 746 return len; 747 } 748 749 /* 750 * Build a routing message in a buffer. 751 * Copy the addresses in the rtinfo->rti_info[] sockaddr array 752 * to the end of the buffer after the message header. 753 * 754 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[]. 755 * This side-effect can be avoided if we reorder the addrs bitmask field in all 756 * the route messages to line up so we can set it here instead of back in the 757 * calling routine. 758 */ 759 static void 760 rt_msg_buffer(int type, struct rt_addrinfo *rtinfo, void *buf, int msglen) 761 { 762 struct rt_msghdr *rtm; 763 char *cp; 764 int dlen, i; 765 766 rtm = (struct rt_msghdr *) buf; 767 rtm->rtm_version = RTM_VERSION; 768 rtm->rtm_type = type; 769 rtm->rtm_msglen = msglen; 770 771 cp = (char *)buf + rt_msghdrsize(type); 772 rtinfo->rti_addrs = 0; 773 for (i = 0; i < RTAX_MAX; i++) { 774 struct sockaddr *sa; 775 776 if ((sa = rtinfo->rti_info[i]) == NULL) 777 continue; 778 rtinfo->rti_addrs |= (1 << i); 779 dlen = ROUNDUP(sa->sa_len); 780 bcopy(sa, cp, dlen); 781 cp += dlen; 782 } 783 } 784 785 /* 786 * Build a routing message in a mbuf chain. 787 * Copy the addresses in the rtinfo->rti_info[] sockaddr array 788 * to the end of the mbuf after the message header. 789 * 790 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[]. 791 * This side-effect can be avoided if we reorder the addrs bitmask field in all 792 * the route messages to line up so we can set it here instead of back in the 793 * calling routine. 794 */ 795 static struct mbuf * 796 rt_msg_mbuf(int type, struct rt_addrinfo *rtinfo) 797 { 798 struct mbuf *m; 799 struct rt_msghdr *rtm; 800 int hlen, len; 801 int i; 802 803 hlen = rt_msghdrsize(type); 804 KASSERT(hlen <= MCLBYTES, ("rt_msg_mbuf: hlen %d doesn't fit", hlen)); 805 806 m = m_getl(hlen, MB_DONTWAIT, MT_DATA, M_PKTHDR, NULL); 807 if (m == NULL) 808 return (NULL); 809 m->m_pkthdr.len = m->m_len = hlen; 810 m->m_pkthdr.rcvif = NULL; 811 rtinfo->rti_addrs = 0; 812 len = hlen; 813 for (i = 0; i < RTAX_MAX; i++) { 814 struct sockaddr *sa; 815 int dlen; 816 817 if ((sa = rtinfo->rti_info[i]) == NULL) 818 continue; 819 rtinfo->rti_addrs |= (1 << i); 820 dlen = ROUNDUP(sa->sa_len); 821 m_copyback(m, len, dlen, (caddr_t)sa); /* can grow mbuf chain */ 822 len += dlen; 823 } 824 if (m->m_pkthdr.len != len) { /* one of the m_copyback() calls failed */ 825 m_freem(m); 826 return (NULL); 827 } 828 rtm = mtod(m, struct rt_msghdr *); 829 bzero(rtm, hlen); 830 rtm->rtm_msglen = len; 831 rtm->rtm_version = RTM_VERSION; 832 rtm->rtm_type = type; 833 return (m); 834 } 835 836 /* 837 * This routine is called to generate a message from the routing 838 * socket indicating that a redirect has occurred, a routing lookup 839 * has failed, or that a protocol has detected timeouts to a particular 840 * destination. 841 */ 842 void 843 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error) 844 { 845 struct sockaddr *dst = rtinfo->rti_info[RTAX_DST]; 846 struct rt_msghdr *rtm; 847 struct mbuf *m; 848 849 if (route_cb.any_count == 0) 850 return; 851 m = rt_msg_mbuf(type, rtinfo); 852 if (m == NULL) 853 return; 854 rtm = mtod(m, struct rt_msghdr *); 855 rtm->rtm_flags = RTF_DONE | flags; 856 rtm->rtm_errno = error; 857 rtm->rtm_addrs = rtinfo->rti_addrs; 858 rts_input(m, familyof(dst)); 859 } 860 861 void 862 rt_dstmsg(int type, struct sockaddr *dst, int error) 863 { 864 struct rt_msghdr *rtm; 865 struct rt_addrinfo addrs; 866 struct mbuf *m; 867 868 if (route_cb.any_count == 0) 869 return; 870 bzero(&addrs, sizeof(struct rt_addrinfo)); 871 addrs.rti_info[RTAX_DST] = dst; 872 m = rt_msg_mbuf(type, &addrs); 873 if (m == NULL) 874 return; 875 rtm = mtod(m, struct rt_msghdr *); 876 rtm->rtm_flags = RTF_DONE; 877 rtm->rtm_errno = error; 878 rtm->rtm_addrs = addrs.rti_addrs; 879 rts_input(m, familyof(dst)); 880 } 881 882 /* 883 * This routine is called to generate a message from the routing 884 * socket indicating that the status of a network interface has changed. 885 */ 886 void 887 rt_ifmsg(struct ifnet *ifp) 888 { 889 struct if_msghdr *ifm; 890 struct mbuf *m; 891 struct rt_addrinfo rtinfo; 892 893 if (route_cb.any_count == 0) 894 return; 895 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 896 m = rt_msg_mbuf(RTM_IFINFO, &rtinfo); 897 if (m == NULL) 898 return; 899 ifm = mtod(m, struct if_msghdr *); 900 ifm->ifm_index = ifp->if_index; 901 ifm->ifm_flags = ifp->if_flags; 902 ifm->ifm_data = ifp->if_data; 903 ifm->ifm_addrs = 0; 904 rts_input(m, 0); 905 } 906 907 static void 908 rt_ifamsg(int cmd, struct ifaddr *ifa) 909 { 910 struct ifa_msghdr *ifam; 911 struct rt_addrinfo rtinfo; 912 struct mbuf *m; 913 struct ifnet *ifp = ifa->ifa_ifp; 914 915 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 916 rtinfo.rti_ifaaddr = ifa->ifa_addr; 917 rtinfo.rti_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr; 918 rtinfo.rti_netmask = ifa->ifa_netmask; 919 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr; 920 921 m = rt_msg_mbuf(cmd, &rtinfo); 922 if (m == NULL) 923 return; 924 925 ifam = mtod(m, struct ifa_msghdr *); 926 ifam->ifam_index = ifp->if_index; 927 ifam->ifam_metric = ifa->ifa_metric; 928 ifam->ifam_flags = ifa->ifa_flags; 929 ifam->ifam_addrs = rtinfo.rti_addrs; 930 931 rts_input(m, familyof(ifa->ifa_addr)); 932 } 933 934 void 935 rt_rtmsg(int cmd, struct rtentry *rt, struct ifnet *ifp, int error) 936 { 937 struct rt_msghdr *rtm; 938 struct rt_addrinfo rtinfo; 939 struct mbuf *m; 940 struct sockaddr *dst; 941 942 if (rt == NULL) 943 return; 944 945 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 946 rtinfo.rti_dst = dst = rt_key(rt); 947 rtinfo.rti_gateway = rt->rt_gateway; 948 rtinfo.rti_netmask = rt_mask(rt); 949 if (ifp != NULL) 950 rtinfo.rti_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr; 951 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr; 952 953 m = rt_msg_mbuf(cmd, &rtinfo); 954 if (m == NULL) 955 return; 956 957 rtm = mtod(m, struct rt_msghdr *); 958 if (ifp != NULL) 959 rtm->rtm_index = ifp->if_index; 960 rtm->rtm_flags |= rt->rt_flags; 961 rtm->rtm_errno = error; 962 rtm->rtm_addrs = rtinfo.rti_addrs; 963 964 rts_input(m, familyof(dst)); 965 } 966 967 /* 968 * This is called to generate messages from the routing socket 969 * indicating a network interface has had addresses associated with it. 970 * if we ever reverse the logic and replace messages TO the routing 971 * socket indicate a request to configure interfaces, then it will 972 * be unnecessary as the routing socket will automatically generate 973 * copies of it. 974 */ 975 void 976 rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt) 977 { 978 #ifdef SCTP 979 /* 980 * notify the SCTP stack 981 * this will only get called when an address is added/deleted 982 * XXX pass the ifaddr struct instead if ifa->ifa_addr... 983 */ 984 if (cmd == RTM_ADD) 985 sctp_add_ip_address(ifa); 986 else if (cmd == RTM_DELETE) 987 sctp_delete_ip_address(ifa); 988 #endif /* SCTP */ 989 990 if (route_cb.any_count == 0) 991 return; 992 993 if (cmd == RTM_ADD) { 994 rt_ifamsg(RTM_NEWADDR, ifa); 995 rt_rtmsg(RTM_ADD, rt, ifa->ifa_ifp, error); 996 } else { 997 KASSERT((cmd == RTM_DELETE), ("unknown cmd %d", cmd)); 998 rt_rtmsg(RTM_DELETE, rt, ifa->ifa_ifp, error); 999 rt_ifamsg(RTM_DELADDR, ifa); 1000 } 1001 } 1002 1003 /* 1004 * This is the analogue to the rt_newaddrmsg which performs the same 1005 * function but for multicast group memberhips. This is easier since 1006 * there is no route state to worry about. 1007 */ 1008 void 1009 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma) 1010 { 1011 struct rt_addrinfo rtinfo; 1012 struct mbuf *m = NULL; 1013 struct ifnet *ifp = ifma->ifma_ifp; 1014 struct ifma_msghdr *ifmam; 1015 1016 if (route_cb.any_count == 0) 1017 return; 1018 1019 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1020 rtinfo.rti_ifaaddr = ifma->ifma_addr; 1021 if (ifp != NULL && !TAILQ_EMPTY(&ifp->if_addrhead)) 1022 rtinfo.rti_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr; 1023 /* 1024 * If a link-layer address is present, present it as a ``gateway'' 1025 * (similarly to how ARP entries, e.g., are presented). 1026 */ 1027 rtinfo.rti_gateway = ifma->ifma_lladdr; 1028 1029 m = rt_msg_mbuf(cmd, &rtinfo); 1030 if (m == NULL) 1031 return; 1032 1033 ifmam = mtod(m, struct ifma_msghdr *); 1034 ifmam->ifmam_index = ifp->if_index; 1035 ifmam->ifmam_addrs = rtinfo.rti_addrs; 1036 1037 rts_input(m, familyof(ifma->ifma_addr)); 1038 } 1039 1040 static struct mbuf * 1041 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1042 struct rt_addrinfo *info) 1043 { 1044 struct if_announcemsghdr *ifan; 1045 struct mbuf *m; 1046 1047 if (route_cb.any_count == 0) 1048 return NULL; 1049 1050 bzero(info, sizeof(*info)); 1051 m = rt_msg_mbuf(type, info); 1052 if (m == NULL) 1053 return NULL; 1054 1055 ifan = mtod(m, struct if_announcemsghdr *); 1056 ifan->ifan_index = ifp->if_index; 1057 strlcpy(ifan->ifan_name, ifp->if_xname, sizeof ifan->ifan_name); 1058 ifan->ifan_what = what; 1059 return m; 1060 } 1061 1062 /* 1063 * This is called to generate routing socket messages indicating 1064 * IEEE80211 wireless events. 1065 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1066 */ 1067 void 1068 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len) 1069 { 1070 struct rt_addrinfo info; 1071 struct mbuf *m; 1072 1073 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1074 if (m == NULL) 1075 return; 1076 1077 /* 1078 * Append the ieee80211 data. Try to stick it in the 1079 * mbuf containing the ifannounce msg; otherwise allocate 1080 * a new mbuf and append. 1081 * 1082 * NB: we assume m is a single mbuf. 1083 */ 1084 if (data_len > M_TRAILINGSPACE(m)) { 1085 struct mbuf *n = m_get(MB_DONTWAIT, MT_DATA); 1086 if (n == NULL) { 1087 m_freem(m); 1088 return; 1089 } 1090 bcopy(data, mtod(n, void *), data_len); 1091 n->m_len = data_len; 1092 m->m_next = n; 1093 } else if (data_len > 0) { 1094 bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len); 1095 m->m_len += data_len; 1096 } 1097 if (m->m_flags & M_PKTHDR) 1098 m->m_pkthdr.len += data_len; 1099 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len; 1100 rts_input(m, 0); 1101 } 1102 1103 /* 1104 * This is called to generate routing socket messages indicating 1105 * network interface arrival and departure. 1106 */ 1107 void 1108 rt_ifannouncemsg(struct ifnet *ifp, int what) 1109 { 1110 struct rt_addrinfo addrinfo; 1111 struct mbuf *m; 1112 1113 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &addrinfo); 1114 if (m != NULL) 1115 rts_input(m, 0); 1116 } 1117 1118 static int 1119 resizewalkarg(struct walkarg *w, int len) 1120 { 1121 void *newptr; 1122 1123 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 1124 if (newptr == NULL) 1125 return (ENOMEM); 1126 if (w->w_tmem != NULL) 1127 kfree(w->w_tmem, M_RTABLE); 1128 w->w_tmem = newptr; 1129 w->w_tmemsize = len; 1130 return (0); 1131 } 1132 1133 /* 1134 * This is used in dumping the kernel table via sysctl(). 1135 */ 1136 int 1137 sysctl_dumpentry(struct radix_node *rn, void *vw) 1138 { 1139 struct walkarg *w = vw; 1140 struct rtentry *rt = (struct rtentry *)rn; 1141 struct rt_addrinfo rtinfo; 1142 int error, msglen; 1143 1144 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1145 return 0; 1146 1147 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1148 rtinfo.rti_dst = rt_key(rt); 1149 rtinfo.rti_gateway = rt->rt_gateway; 1150 rtinfo.rti_netmask = rt_mask(rt); 1151 rtinfo.rti_genmask = rt->rt_genmask; 1152 if (rt->rt_ifp != NULL) { 1153 rtinfo.rti_ifpaddr = 1154 TAILQ_FIRST(&rt->rt_ifp->if_addrhead)->ifa_addr; 1155 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr; 1156 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1157 rtinfo.rti_bcastaddr = rt->rt_ifa->ifa_dstaddr; 1158 } 1159 msglen = rt_msgsize(RTM_GET, &rtinfo); 1160 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0) 1161 return (ENOMEM); 1162 rt_msg_buffer(RTM_GET, &rtinfo, w->w_tmem, msglen); 1163 if (w->w_req != NULL) { 1164 struct rt_msghdr *rtm = w->w_tmem; 1165 1166 rtm->rtm_flags = rt->rt_flags; 1167 rtm->rtm_use = rt->rt_use; 1168 rtm->rtm_rmx = rt->rt_rmx; 1169 rtm->rtm_index = rt->rt_ifp->if_index; 1170 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1171 rtm->rtm_addrs = rtinfo.rti_addrs; 1172 error = SYSCTL_OUT(w->w_req, rtm, msglen); 1173 return (error); 1174 } 1175 return (0); 1176 } 1177 1178 static int 1179 sysctl_iflist(int af, struct walkarg *w) 1180 { 1181 struct ifnet *ifp; 1182 struct ifaddr *ifa; 1183 struct rt_addrinfo rtinfo; 1184 int msglen, error; 1185 1186 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1187 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1188 if (w->w_arg && w->w_arg != ifp->if_index) 1189 continue; 1190 ifa = TAILQ_FIRST(&ifp->if_addrhead); 1191 rtinfo.rti_ifpaddr = ifa->ifa_addr; 1192 msglen = rt_msgsize(RTM_IFINFO, &rtinfo); 1193 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0) 1194 return (ENOMEM); 1195 rt_msg_buffer(RTM_IFINFO, &rtinfo, w->w_tmem, msglen); 1196 rtinfo.rti_ifpaddr = NULL; 1197 if (w->w_req != NULL && w->w_tmem != NULL) { 1198 struct if_msghdr *ifm = w->w_tmem; 1199 1200 ifm->ifm_index = ifp->if_index; 1201 ifm->ifm_flags = ifp->if_flags; 1202 ifm->ifm_data = ifp->if_data; 1203 ifm->ifm_addrs = rtinfo.rti_addrs; 1204 error = SYSCTL_OUT(w->w_req, ifm, msglen); 1205 if (error) 1206 return (error); 1207 } 1208 while ((ifa = TAILQ_NEXT(ifa, ifa_link)) != NULL) { 1209 if (af && af != ifa->ifa_addr->sa_family) 1210 continue; 1211 if (curproc->p_ucred->cr_prison && 1212 prison_if(curproc->p_ucred, ifa->ifa_addr)) 1213 continue; 1214 rtinfo.rti_ifaaddr = ifa->ifa_addr; 1215 rtinfo.rti_netmask = ifa->ifa_netmask; 1216 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr; 1217 msglen = rt_msgsize(RTM_NEWADDR, &rtinfo); 1218 if (w->w_tmemsize < msglen && 1219 resizewalkarg(w, msglen) != 0) 1220 return (ENOMEM); 1221 rt_msg_buffer(RTM_NEWADDR, &rtinfo, w->w_tmem, msglen); 1222 if (w->w_req != NULL) { 1223 struct ifa_msghdr *ifam = w->w_tmem; 1224 1225 ifam->ifam_index = ifa->ifa_ifp->if_index; 1226 ifam->ifam_flags = ifa->ifa_flags; 1227 ifam->ifam_metric = ifa->ifa_metric; 1228 ifam->ifam_addrs = rtinfo.rti_addrs; 1229 error = SYSCTL_OUT(w->w_req, w->w_tmem, msglen); 1230 if (error) 1231 return (error); 1232 } 1233 } 1234 rtinfo.rti_netmask = NULL; 1235 rtinfo.rti_ifaaddr = NULL; 1236 rtinfo.rti_bcastaddr = NULL; 1237 } 1238 return (0); 1239 } 1240 1241 static int 1242 sysctl_rtsock(SYSCTL_HANDLER_ARGS) 1243 { 1244 int *name = (int *)arg1; 1245 u_int namelen = arg2; 1246 struct radix_node_head *rnh; 1247 int i, error = EINVAL; 1248 int origcpu; 1249 u_char af; 1250 struct walkarg w; 1251 1252 name ++; 1253 namelen--; 1254 if (req->newptr) 1255 return (EPERM); 1256 if (namelen != 3 && namelen != 4) 1257 return (EINVAL); 1258 af = name[0]; 1259 bzero(&w, sizeof w); 1260 w.w_op = name[1]; 1261 w.w_arg = name[2]; 1262 w.w_req = req; 1263 1264 /* 1265 * Optional third argument specifies cpu, used primarily for 1266 * debugging the route table. 1267 */ 1268 if (namelen == 4) { 1269 if (name[3] < 0 || name[3] >= ncpus) 1270 return (EINVAL); 1271 origcpu = mycpuid; 1272 lwkt_migratecpu(name[3]); 1273 } else { 1274 origcpu = -1; 1275 } 1276 crit_enter(); 1277 switch (w.w_op) { 1278 case NET_RT_DUMP: 1279 case NET_RT_FLAGS: 1280 for (i = 1; i <= AF_MAX; i++) 1281 if ((rnh = rt_tables[mycpuid][i]) && 1282 (af == 0 || af == i) && 1283 (error = rnh->rnh_walktree(rnh, 1284 sysctl_dumpentry, &w))) 1285 break; 1286 break; 1287 1288 case NET_RT_IFLIST: 1289 error = sysctl_iflist(af, &w); 1290 } 1291 crit_exit(); 1292 if (w.w_tmem != NULL) 1293 kfree(w.w_tmem, M_RTABLE); 1294 if (origcpu >= 0) 1295 lwkt_migratecpu(origcpu); 1296 return (error); 1297 } 1298 1299 SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, ""); 1300 1301 /* 1302 * Definitions of protocols supported in the ROUTE domain. 1303 */ 1304 1305 static struct domain routedomain; /* or at least forward */ 1306 1307 static struct protosw routesw[] = { 1308 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 1309 0, route_output, raw_ctlinput, 0, 1310 cpu0_soport, 1311 raw_init, 0, 0, 0, 1312 &route_usrreqs 1313 } 1314 }; 1315 1316 static struct domain routedomain = { 1317 PF_ROUTE, "route", NULL, NULL, NULL, 1318 routesw, &routesw[(sizeof routesw)/(sizeof routesw[0])], 1319 }; 1320 1321 DOMAIN_SET(route); 1322