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 1.42 2008/01/06 16:55:51 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 #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_addrhead)->ifa_addr; 409 rtinfo->rti_ifaaddr = rt->rt_ifa->ifa_addr; 410 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 411 rtinfo->rti_bcastaddr = rt->rt_ifa->ifa_dstaddr; 412 rtm->rtm_index = rt->rt_ifp->if_index; 413 } else { 414 rtinfo->rti_ifpaddr = NULL; 415 rtinfo->rti_ifaaddr = NULL; 416 } 417 } 418 419 msglen = rt_msgsize(rtm->rtm_type, rtinfo); 420 if (rtm->rtm_msglen < msglen) { 421 rtm = reallocbuf(rtm, msglen, rtm->rtm_msglen); 422 if (rtm == NULL) 423 return (ENOBUFS); 424 *prtm = rtm; 425 } 426 rt_msg_buffer(rtm->rtm_type, rtinfo, rtm, msglen); 427 428 rtm->rtm_flags = rt->rt_flags; 429 rtm->rtm_rmx = rt->rt_rmx; 430 rtm->rtm_addrs = rtinfo->rti_addrs; 431 432 return (0); 433 } 434 435 static void route_output_add_callback(int, int, struct rt_addrinfo *, 436 struct rtentry *, void *); 437 static void route_output_delete_callback(int, int, struct rt_addrinfo *, 438 struct rtentry *, void *); 439 static void route_output_change_callback(int, int, struct rt_addrinfo *, 440 struct rtentry *, void *); 441 static void route_output_lock_callback(int, int, struct rt_addrinfo *, 442 struct rtentry *, void *); 443 444 /*ARGSUSED*/ 445 static int 446 route_output(struct mbuf *m, struct socket *so, ...) 447 { 448 struct rt_msghdr *rtm = NULL; 449 struct rtentry *rt; 450 struct radix_node_head *rnh; 451 struct rawcb *rp = NULL; 452 struct pr_output_info *oi; 453 struct rt_addrinfo rtinfo; 454 int len, error = 0; 455 __va_list ap; 456 457 __va_start(ap, so); 458 oi = __va_arg(ap, struct pr_output_info *); 459 __va_end(ap); 460 461 #define gotoerr(e) { error = e; goto flush;} 462 463 if (m == NULL || 464 (m->m_len < sizeof(long) && 465 (m = m_pullup(m, sizeof(long))) == NULL)) 466 return (ENOBUFS); 467 if (!(m->m_flags & M_PKTHDR)) 468 panic("route_output"); 469 len = m->m_pkthdr.len; 470 if (len < sizeof(struct rt_msghdr) || 471 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 472 rtinfo.rti_dst = NULL; 473 gotoerr(EINVAL); 474 } 475 rtm = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 476 if (rtm == NULL) { 477 rtinfo.rti_dst = NULL; 478 gotoerr(ENOBUFS); 479 } 480 m_copydata(m, 0, len, (caddr_t)rtm); 481 if (rtm->rtm_version != RTM_VERSION) { 482 rtinfo.rti_dst = NULL; 483 gotoerr(EPROTONOSUPPORT); 484 } 485 rtm->rtm_pid = oi->p_pid; 486 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 487 rtinfo.rti_addrs = rtm->rtm_addrs; 488 if (rt_xaddrs((char *)(rtm + 1), (char *)rtm + len, &rtinfo) != 0) { 489 rtinfo.rti_dst = NULL; 490 gotoerr(EINVAL); 491 } 492 rtinfo.rti_flags = rtm->rtm_flags; 493 if (rtinfo.rti_dst == NULL || rtinfo.rti_dst->sa_family >= AF_MAX || 494 (rtinfo.rti_gateway && rtinfo.rti_gateway->sa_family >= AF_MAX)) 495 gotoerr(EINVAL); 496 497 if (rtinfo.rti_genmask != NULL) { 498 struct radix_node *n; 499 500 #define clen(s) (*(u_char *)(s)) 501 n = rn_addmask((char *)rtinfo.rti_genmask, TRUE, 1); 502 if (n != NULL && 503 rtinfo.rti_genmask->sa_len >= clen(n->rn_key) && 504 bcmp((char *)rtinfo.rti_genmask + 1, 505 (char *)n->rn_key + 1, clen(n->rn_key) - 1) == 0) 506 rtinfo.rti_genmask = (struct sockaddr *)n->rn_key; 507 else 508 gotoerr(ENOBUFS); 509 } 510 511 /* 512 * Verify that the caller has the appropriate privilege; RTM_GET 513 * is the only operation the non-superuser is allowed. 514 */ 515 if (rtm->rtm_type != RTM_GET && suser_cred(so->so_cred, 0) != 0) 516 gotoerr(EPERM); 517 518 switch (rtm->rtm_type) { 519 case RTM_ADD: 520 if (rtinfo.rti_gateway == NULL) { 521 error = EINVAL; 522 } else { 523 error = rtrequest1_global(RTM_ADD, &rtinfo, 524 route_output_add_callback, rtm); 525 } 526 break; 527 case RTM_DELETE: 528 /* 529 * note: &rtm passed as argument so 'rtm' can be replaced. 530 */ 531 error = rtrequest1_global(RTM_DELETE, &rtinfo, 532 route_output_delete_callback, &rtm); 533 break; 534 case RTM_GET: 535 rnh = rt_tables[mycpuid][rtinfo.rti_dst->sa_family]; 536 if (rnh == NULL) { 537 error = EAFNOSUPPORT; 538 break; 539 } 540 rt = (struct rtentry *) 541 rnh->rnh_lookup((char *)rtinfo.rti_dst, 542 (char *)rtinfo.rti_netmask, rnh); 543 if (rt == NULL) { 544 error = ESRCH; 545 break; 546 } 547 rt->rt_refcnt++; 548 if (fillrtmsg(&rtm, rt, &rtinfo) != 0) 549 gotoerr(ENOBUFS); 550 --rt->rt_refcnt; 551 break; 552 case RTM_CHANGE: 553 error = rtrequest1_global(RTM_GET, &rtinfo, 554 route_output_change_callback, rtm); 555 break; 556 case RTM_LOCK: 557 error = rtrequest1_global(RTM_GET, &rtinfo, 558 route_output_lock_callback, rtm); 559 break; 560 default: 561 error = EOPNOTSUPP; 562 break; 563 } 564 565 flush: 566 if (rtm != NULL) { 567 if (error != 0) 568 rtm->rtm_errno = error; 569 else 570 rtm->rtm_flags |= RTF_DONE; 571 } 572 573 /* 574 * Check to see if we don't want our own messages. 575 */ 576 if (!(so->so_options & SO_USELOOPBACK)) { 577 if (route_cb.any_count <= 1) { 578 if (rtm != NULL) 579 kfree(rtm, M_RTABLE); 580 m_freem(m); 581 return (error); 582 } 583 /* There is another listener, so construct message */ 584 rp = sotorawcb(so); 585 } 586 if (rtm != NULL) { 587 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 588 if (m->m_pkthdr.len < rtm->rtm_msglen) { 589 m_freem(m); 590 m = NULL; 591 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 592 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 593 kfree(rtm, M_RTABLE); 594 } 595 if (rp != NULL) 596 rp->rcb_proto.sp_family = 0; /* Avoid us */ 597 if (m != NULL) 598 rts_input(m, familyof(rtinfo.rti_dst)); 599 if (rp != NULL) 600 rp->rcb_proto.sp_family = PF_ROUTE; 601 return (error); 602 } 603 604 static void 605 route_output_add_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 606 struct rtentry *rt, void *arg) 607 { 608 struct rt_msghdr *rtm = arg; 609 610 if (error == 0 && rt != NULL) { 611 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 612 &rt->rt_rmx); 613 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 614 rt->rt_rmx.rmx_locks |= 615 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 616 rt->rt_genmask = rtinfo->rti_genmask; 617 } 618 } 619 620 static void 621 route_output_delete_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 622 struct rtentry *rt, void *arg) 623 { 624 struct rt_msghdr **rtm = arg; 625 626 if (error == 0 && rt) { 627 ++rt->rt_refcnt; 628 if (fillrtmsg(rtm, rt, rtinfo) != 0) { 629 error = ENOBUFS; 630 /* XXX no way to return the error */ 631 } 632 --rt->rt_refcnt; 633 } 634 } 635 636 static void 637 route_output_change_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 638 struct rtentry *rt, void *arg) 639 { 640 struct rt_msghdr *rtm = arg; 641 struct ifaddr *ifa; 642 643 if (error) 644 goto done; 645 646 /* 647 * new gateway could require new ifaddr, ifp; 648 * flags may also be different; ifp may be specified 649 * by ll sockaddr when protocol address is ambiguous 650 */ 651 if (((rt->rt_flags & RTF_GATEWAY) && rtinfo->rti_gateway != NULL) || 652 rtinfo->rti_ifpaddr != NULL || (rtinfo->rti_ifaaddr != NULL && 653 sa_equal(rtinfo->rti_ifaaddr, rt->rt_ifa->ifa_addr)) 654 ) { 655 error = rt_getifa(rtinfo); 656 if (error != 0) 657 goto done; 658 } 659 if (rtinfo->rti_gateway != NULL) { 660 error = rt_setgate(rt, rt_key(rt), rtinfo->rti_gateway); 661 if (error != 0) 662 goto done; 663 } 664 if ((ifa = rtinfo->rti_ifa) != NULL) { 665 struct ifaddr *oifa = rt->rt_ifa; 666 667 if (oifa != ifa) { 668 if (oifa && oifa->ifa_rtrequest) 669 oifa->ifa_rtrequest(RTM_DELETE, rt, rtinfo); 670 IFAFREE(rt->rt_ifa); 671 IFAREF(ifa); 672 rt->rt_ifa = ifa; 673 rt->rt_ifp = rtinfo->rti_ifp; 674 } 675 } 676 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, &rt->rt_rmx); 677 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 678 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, rtinfo); 679 if (rtinfo->rti_genmask != NULL) 680 rt->rt_genmask = rtinfo->rti_genmask; 681 done: 682 /* XXX no way to return error */ 683 ; 684 } 685 686 static void 687 route_output_lock_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 688 struct rtentry *rt, void *arg) 689 { 690 struct rt_msghdr *rtm = arg; 691 692 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 693 rt->rt_rmx.rmx_locks |= 694 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 695 } 696 697 static void 698 rt_setmetrics(u_long which, struct rt_metrics *in, struct rt_metrics *out) 699 { 700 #define setmetric(flag, elt) if (which & (flag)) out->elt = in->elt; 701 setmetric(RTV_RPIPE, rmx_recvpipe); 702 setmetric(RTV_SPIPE, rmx_sendpipe); 703 setmetric(RTV_SSTHRESH, rmx_ssthresh); 704 setmetric(RTV_RTT, rmx_rtt); 705 setmetric(RTV_RTTVAR, rmx_rttvar); 706 setmetric(RTV_HOPCOUNT, rmx_hopcount); 707 setmetric(RTV_MTU, rmx_mtu); 708 setmetric(RTV_EXPIRE, rmx_expire); 709 #undef setmetric 710 } 711 712 #define ROUNDUP(a) \ 713 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 714 715 /* 716 * Extract the addresses of the passed sockaddrs. 717 * Do a little sanity checking so as to avoid bad memory references. 718 * This data is derived straight from userland. 719 */ 720 static int 721 rt_xaddrs(char *cp, char *cplim, struct rt_addrinfo *rtinfo) 722 { 723 struct sockaddr *sa; 724 int i; 725 726 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 727 if ((rtinfo->rti_addrs & (1 << i)) == 0) 728 continue; 729 sa = (struct sockaddr *)cp; 730 /* 731 * It won't fit. 732 */ 733 if ((cp + sa->sa_len) > cplim) { 734 return (EINVAL); 735 } 736 737 /* 738 * There are no more... Quit now. 739 * If there are more bits, they are in error. 740 * I've seen this. route(1) can evidently generate these. 741 * This causes kernel to core dump. 742 * For compatibility, if we see this, point to a safe address. 743 */ 744 if (sa->sa_len == 0) { 745 static struct sockaddr sa_zero = { 746 sizeof sa_zero, AF_INET, 747 }; 748 749 rtinfo->rti_info[i] = &sa_zero; 750 return (0); /* should be EINVAL but for compat */ 751 } 752 753 /* Accept the sockaddr. */ 754 rtinfo->rti_info[i] = sa; 755 cp += ROUNDUP(sa->sa_len); 756 } 757 return (0); 758 } 759 760 static int 761 rt_msghdrsize(int type) 762 { 763 switch (type) { 764 case RTM_DELADDR: 765 case RTM_NEWADDR: 766 return sizeof(struct ifa_msghdr); 767 case RTM_DELMADDR: 768 case RTM_NEWMADDR: 769 return sizeof(struct ifma_msghdr); 770 case RTM_IFINFO: 771 return sizeof(struct if_msghdr); 772 case RTM_IFANNOUNCE: 773 case RTM_IEEE80211: 774 return sizeof(struct if_announcemsghdr); 775 default: 776 return sizeof(struct rt_msghdr); 777 } 778 } 779 780 static int 781 rt_msgsize(int type, struct rt_addrinfo *rtinfo) 782 { 783 int len, i; 784 785 len = rt_msghdrsize(type); 786 for (i = 0; i < RTAX_MAX; i++) { 787 if (rtinfo->rti_info[i] != NULL) 788 len += ROUNDUP(rtinfo->rti_info[i]->sa_len); 789 } 790 len = ALIGN(len); 791 return len; 792 } 793 794 /* 795 * Build a routing message in a buffer. 796 * Copy the addresses in the rtinfo->rti_info[] sockaddr array 797 * to the end of the buffer after the message header. 798 * 799 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[]. 800 * This side-effect can be avoided if we reorder the addrs bitmask field in all 801 * the route messages to line up so we can set it here instead of back in the 802 * calling routine. 803 */ 804 static void 805 rt_msg_buffer(int type, struct rt_addrinfo *rtinfo, void *buf, int msglen) 806 { 807 struct rt_msghdr *rtm; 808 char *cp; 809 int dlen, i; 810 811 rtm = (struct rt_msghdr *) buf; 812 rtm->rtm_version = RTM_VERSION; 813 rtm->rtm_type = type; 814 rtm->rtm_msglen = msglen; 815 816 cp = (char *)buf + rt_msghdrsize(type); 817 rtinfo->rti_addrs = 0; 818 for (i = 0; i < RTAX_MAX; i++) { 819 struct sockaddr *sa; 820 821 if ((sa = rtinfo->rti_info[i]) == NULL) 822 continue; 823 rtinfo->rti_addrs |= (1 << i); 824 dlen = ROUNDUP(sa->sa_len); 825 bcopy(sa, cp, dlen); 826 cp += dlen; 827 } 828 } 829 830 /* 831 * Build a routing message in a mbuf chain. 832 * Copy the addresses in the rtinfo->rti_info[] sockaddr array 833 * to the end of the mbuf after the message header. 834 * 835 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[]. 836 * This side-effect can be avoided if we reorder the addrs bitmask field in all 837 * the route messages to line up so we can set it here instead of back in the 838 * calling routine. 839 */ 840 static struct mbuf * 841 rt_msg_mbuf(int type, struct rt_addrinfo *rtinfo) 842 { 843 struct mbuf *m; 844 struct rt_msghdr *rtm; 845 int hlen, len; 846 int i; 847 848 hlen = rt_msghdrsize(type); 849 KASSERT(hlen <= MCLBYTES, ("rt_msg_mbuf: hlen %d doesn't fit", hlen)); 850 851 m = m_getl(hlen, MB_DONTWAIT, MT_DATA, M_PKTHDR, NULL); 852 if (m == NULL) 853 return (NULL); 854 mbuftrackid(m, 32); 855 m->m_pkthdr.len = m->m_len = hlen; 856 m->m_pkthdr.rcvif = NULL; 857 rtinfo->rti_addrs = 0; 858 len = hlen; 859 for (i = 0; i < RTAX_MAX; i++) { 860 struct sockaddr *sa; 861 int dlen; 862 863 if ((sa = rtinfo->rti_info[i]) == NULL) 864 continue; 865 rtinfo->rti_addrs |= (1 << i); 866 dlen = ROUNDUP(sa->sa_len); 867 m_copyback(m, len, dlen, (caddr_t)sa); /* can grow mbuf chain */ 868 len += dlen; 869 } 870 if (m->m_pkthdr.len != len) { /* one of the m_copyback() calls failed */ 871 m_freem(m); 872 return (NULL); 873 } 874 rtm = mtod(m, struct rt_msghdr *); 875 bzero(rtm, hlen); 876 rtm->rtm_msglen = len; 877 rtm->rtm_version = RTM_VERSION; 878 rtm->rtm_type = type; 879 return (m); 880 } 881 882 /* 883 * This routine is called to generate a message from the routing 884 * socket indicating that a redirect has occurred, a routing lookup 885 * has failed, or that a protocol has detected timeouts to a particular 886 * destination. 887 */ 888 void 889 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error) 890 { 891 struct sockaddr *dst = rtinfo->rti_info[RTAX_DST]; 892 struct rt_msghdr *rtm; 893 struct mbuf *m; 894 895 if (route_cb.any_count == 0) 896 return; 897 m = rt_msg_mbuf(type, rtinfo); 898 if (m == NULL) 899 return; 900 rtm = mtod(m, struct rt_msghdr *); 901 rtm->rtm_flags = RTF_DONE | flags; 902 rtm->rtm_errno = error; 903 rtm->rtm_addrs = rtinfo->rti_addrs; 904 rts_input(m, familyof(dst)); 905 } 906 907 void 908 rt_dstmsg(int type, struct sockaddr *dst, int error) 909 { 910 struct rt_msghdr *rtm; 911 struct rt_addrinfo addrs; 912 struct mbuf *m; 913 914 if (route_cb.any_count == 0) 915 return; 916 bzero(&addrs, sizeof(struct rt_addrinfo)); 917 addrs.rti_info[RTAX_DST] = dst; 918 m = rt_msg_mbuf(type, &addrs); 919 if (m == NULL) 920 return; 921 rtm = mtod(m, struct rt_msghdr *); 922 rtm->rtm_flags = RTF_DONE; 923 rtm->rtm_errno = error; 924 rtm->rtm_addrs = addrs.rti_addrs; 925 rts_input(m, familyof(dst)); 926 } 927 928 /* 929 * This routine is called to generate a message from the routing 930 * socket indicating that the status of a network interface has changed. 931 */ 932 void 933 rt_ifmsg(struct ifnet *ifp) 934 { 935 struct if_msghdr *ifm; 936 struct mbuf *m; 937 struct rt_addrinfo rtinfo; 938 939 if (route_cb.any_count == 0) 940 return; 941 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 942 m = rt_msg_mbuf(RTM_IFINFO, &rtinfo); 943 if (m == NULL) 944 return; 945 ifm = mtod(m, struct if_msghdr *); 946 ifm->ifm_index = ifp->if_index; 947 ifm->ifm_flags = ifp->if_flags; 948 ifm->ifm_data = ifp->if_data; 949 ifm->ifm_addrs = 0; 950 rts_input(m, 0); 951 } 952 953 static void 954 rt_ifamsg(int cmd, struct ifaddr *ifa) 955 { 956 struct ifa_msghdr *ifam; 957 struct rt_addrinfo rtinfo; 958 struct mbuf *m; 959 struct ifnet *ifp = ifa->ifa_ifp; 960 961 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 962 rtinfo.rti_ifaaddr = ifa->ifa_addr; 963 rtinfo.rti_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr; 964 rtinfo.rti_netmask = ifa->ifa_netmask; 965 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr; 966 967 m = rt_msg_mbuf(cmd, &rtinfo); 968 if (m == NULL) 969 return; 970 971 ifam = mtod(m, struct ifa_msghdr *); 972 ifam->ifam_index = ifp->if_index; 973 ifam->ifam_metric = ifa->ifa_metric; 974 ifam->ifam_flags = ifa->ifa_flags; 975 ifam->ifam_addrs = rtinfo.rti_addrs; 976 977 rts_input(m, familyof(ifa->ifa_addr)); 978 } 979 980 void 981 rt_rtmsg(int cmd, struct rtentry *rt, struct ifnet *ifp, int error) 982 { 983 struct rt_msghdr *rtm; 984 struct rt_addrinfo rtinfo; 985 struct mbuf *m; 986 struct sockaddr *dst; 987 988 if (rt == NULL) 989 return; 990 991 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 992 rtinfo.rti_dst = dst = rt_key(rt); 993 rtinfo.rti_gateway = rt->rt_gateway; 994 rtinfo.rti_netmask = rt_mask(rt); 995 if (ifp != NULL) 996 rtinfo.rti_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr; 997 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr; 998 999 m = rt_msg_mbuf(cmd, &rtinfo); 1000 if (m == NULL) 1001 return; 1002 1003 rtm = mtod(m, struct rt_msghdr *); 1004 if (ifp != NULL) 1005 rtm->rtm_index = ifp->if_index; 1006 rtm->rtm_flags |= rt->rt_flags; 1007 rtm->rtm_errno = error; 1008 rtm->rtm_addrs = rtinfo.rti_addrs; 1009 1010 rts_input(m, familyof(dst)); 1011 } 1012 1013 /* 1014 * This is called to generate messages from the routing socket 1015 * indicating a network interface has had addresses associated with it. 1016 * if we ever reverse the logic and replace messages TO the routing 1017 * socket indicate a request to configure interfaces, then it will 1018 * be unnecessary as the routing socket will automatically generate 1019 * copies of it. 1020 */ 1021 void 1022 rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt) 1023 { 1024 #ifdef SCTP 1025 /* 1026 * notify the SCTP stack 1027 * this will only get called when an address is added/deleted 1028 * XXX pass the ifaddr struct instead if ifa->ifa_addr... 1029 */ 1030 if (cmd == RTM_ADD) 1031 sctp_add_ip_address(ifa); 1032 else if (cmd == RTM_DELETE) 1033 sctp_delete_ip_address(ifa); 1034 #endif /* SCTP */ 1035 1036 if (route_cb.any_count == 0) 1037 return; 1038 1039 if (cmd == RTM_ADD) { 1040 rt_ifamsg(RTM_NEWADDR, ifa); 1041 rt_rtmsg(RTM_ADD, rt, ifa->ifa_ifp, error); 1042 } else { 1043 KASSERT((cmd == RTM_DELETE), ("unknown cmd %d", cmd)); 1044 rt_rtmsg(RTM_DELETE, rt, ifa->ifa_ifp, error); 1045 rt_ifamsg(RTM_DELADDR, ifa); 1046 } 1047 } 1048 1049 /* 1050 * This is the analogue to the rt_newaddrmsg which performs the same 1051 * function but for multicast group memberhips. This is easier since 1052 * there is no route state to worry about. 1053 */ 1054 void 1055 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma) 1056 { 1057 struct rt_addrinfo rtinfo; 1058 struct mbuf *m = NULL; 1059 struct ifnet *ifp = ifma->ifma_ifp; 1060 struct ifma_msghdr *ifmam; 1061 1062 if (route_cb.any_count == 0) 1063 return; 1064 1065 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1066 rtinfo.rti_ifaaddr = ifma->ifma_addr; 1067 if (ifp != NULL && !TAILQ_EMPTY(&ifp->if_addrhead)) 1068 rtinfo.rti_ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr; 1069 /* 1070 * If a link-layer address is present, present it as a ``gateway'' 1071 * (similarly to how ARP entries, e.g., are presented). 1072 */ 1073 rtinfo.rti_gateway = ifma->ifma_lladdr; 1074 1075 m = rt_msg_mbuf(cmd, &rtinfo); 1076 if (m == NULL) 1077 return; 1078 1079 ifmam = mtod(m, struct ifma_msghdr *); 1080 ifmam->ifmam_index = ifp->if_index; 1081 ifmam->ifmam_addrs = rtinfo.rti_addrs; 1082 1083 rts_input(m, familyof(ifma->ifma_addr)); 1084 } 1085 1086 static struct mbuf * 1087 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1088 struct rt_addrinfo *info) 1089 { 1090 struct if_announcemsghdr *ifan; 1091 struct mbuf *m; 1092 1093 if (route_cb.any_count == 0) 1094 return NULL; 1095 1096 bzero(info, sizeof(*info)); 1097 m = rt_msg_mbuf(type, info); 1098 if (m == NULL) 1099 return NULL; 1100 1101 ifan = mtod(m, struct if_announcemsghdr *); 1102 ifan->ifan_index = ifp->if_index; 1103 strlcpy(ifan->ifan_name, ifp->if_xname, sizeof ifan->ifan_name); 1104 ifan->ifan_what = what; 1105 return m; 1106 } 1107 1108 /* 1109 * This is called to generate routing socket messages indicating 1110 * IEEE80211 wireless events. 1111 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1112 */ 1113 void 1114 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len) 1115 { 1116 struct rt_addrinfo info; 1117 struct mbuf *m; 1118 1119 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1120 if (m == NULL) 1121 return; 1122 1123 /* 1124 * Append the ieee80211 data. Try to stick it in the 1125 * mbuf containing the ifannounce msg; otherwise allocate 1126 * a new mbuf and append. 1127 * 1128 * NB: we assume m is a single mbuf. 1129 */ 1130 if (data_len > M_TRAILINGSPACE(m)) { 1131 struct mbuf *n = m_get(MB_DONTWAIT, MT_DATA); 1132 if (n == NULL) { 1133 m_freem(m); 1134 return; 1135 } 1136 bcopy(data, mtod(n, void *), data_len); 1137 n->m_len = data_len; 1138 m->m_next = n; 1139 } else if (data_len > 0) { 1140 bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len); 1141 m->m_len += data_len; 1142 } 1143 mbuftrackid(m, 33); 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