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 1.45 2008/10/27 02:56:30 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/priv.h> 78 #include <sys/malloc.h> 79 #include <sys/mbuf.h> 80 #include <sys/protosw.h> 81 #include <sys/socket.h> 82 #include <sys/socketvar.h> 83 #include <sys/domain.h> 84 #include <sys/thread2.h> 85 86 #include <net/if.h> 87 #include <net/route.h> 88 #include <net/raw_cb.h> 89 #include <net/netmsg2.h> 90 91 #ifdef SCTP 92 extern void sctp_add_ip_address(struct ifaddr *ifa); 93 extern void sctp_delete_ip_address(struct ifaddr *ifa); 94 #endif /* SCTP */ 95 96 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables"); 97 98 static struct route_cb { 99 int ip_count; 100 int ip6_count; 101 int ipx_count; 102 int ns_count; 103 int any_count; 104 } route_cb; 105 106 static const struct sockaddr route_src = { 2, PF_ROUTE, }; 107 108 struct walkarg { 109 int w_tmemsize; 110 int w_op, w_arg; 111 void *w_tmem; 112 struct sysctl_req *w_req; 113 }; 114 115 static struct mbuf * 116 rt_msg_mbuf (int, struct rt_addrinfo *); 117 static void rt_msg_buffer (int, struct rt_addrinfo *, void *buf, int len); 118 static int rt_msgsize (int type, struct rt_addrinfo *rtinfo); 119 static int rt_xaddrs (char *, char *, struct rt_addrinfo *); 120 static int sysctl_dumpentry (struct radix_node *rn, void *vw); 121 static int sysctl_iflist (int af, struct walkarg *w); 122 static int route_output(struct mbuf *, struct socket *, ...); 123 static void rt_setmetrics (u_long, struct rt_metrics *, 124 struct rt_metrics *); 125 126 /* 127 * It really doesn't make any sense at all for this code to share much 128 * with raw_usrreq.c, since its functionality is so restricted. XXX 129 */ 130 static int 131 rts_abort(struct socket *so) 132 { 133 int error; 134 135 crit_enter(); 136 error = raw_usrreqs.pru_abort(so); 137 crit_exit(); 138 return error; 139 } 140 141 /* pru_accept is EOPNOTSUPP */ 142 143 static int 144 rts_attach(struct socket *so, int proto, struct pru_attach_info *ai) 145 { 146 struct rawcb *rp; 147 int error; 148 149 if (sotorawcb(so) != NULL) 150 return EISCONN; /* XXX panic? */ 151 152 rp = kmalloc(sizeof *rp, M_PCB, M_WAITOK | M_ZERO); 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 .pru_abort = rts_abort, 311 .pru_accept = pru_accept_notsupp, 312 .pru_attach = rts_attach, 313 .pru_bind = rts_bind, 314 .pru_connect = rts_connect, 315 .pru_connect2 = pru_connect2_notsupp, 316 .pru_control = pru_control_notsupp, 317 .pru_detach = rts_detach, 318 .pru_disconnect = rts_disconnect, 319 .pru_listen = pru_listen_notsupp, 320 .pru_peeraddr = rts_peeraddr, 321 .pru_rcvd = pru_rcvd_notsupp, 322 .pru_rcvoob = pru_rcvoob_notsupp, 323 .pru_send = rts_send, 324 .pru_sense = pru_sense_null, 325 .pru_shutdown = rts_shutdown, 326 .pru_sockaddr = rts_sockaddr, 327 .pru_sosend = sosend, 328 .pru_soreceive = soreceive, 329 .pru_sopoll = sopoll 330 }; 331 332 static __inline sa_family_t 333 familyof(struct sockaddr *sa) 334 { 335 return (sa != NULL ? sa->sa_family : 0); 336 } 337 338 /* 339 * Routing socket input function. The packet must be serialized onto cpu 0. 340 * We use the cpu0_soport() netisr processing loop to handle it. 341 * 342 * This looks messy but it means that anyone, including interrupt code, 343 * can send a message to the routing socket. 344 */ 345 static void 346 rts_input_handler(struct netmsg *msg) 347 { 348 static const struct sockaddr route_dst = { 2, PF_ROUTE, }; 349 struct sockproto route_proto; 350 struct netmsg_packet *pmsg; 351 struct mbuf *m; 352 sa_family_t family; 353 struct rawcb *skip; 354 355 pmsg = (void *)msg; 356 family = pmsg->nm_netmsg.nm_lmsg.u.ms_result; 357 route_proto.sp_family = PF_ROUTE; 358 route_proto.sp_protocol = family; 359 360 m = pmsg->nm_packet; 361 M_ASSERTPKTHDR(m); 362 363 skip = m->m_pkthdr.header; 364 m->m_pkthdr.header = NULL; 365 366 raw_input(m, &route_proto, &route_src, &route_dst, skip); 367 } 368 369 static void 370 rts_input_skip(struct mbuf *m, sa_family_t family, struct rawcb *skip) 371 { 372 struct netmsg_packet *pmsg; 373 lwkt_port_t port; 374 375 M_ASSERTPKTHDR(m); 376 377 port = cpu0_soport(NULL, NULL, NULL, 0); 378 pmsg = &m->m_hdr.mh_netmsg; 379 netmsg_init(&pmsg->nm_netmsg, &netisr_apanic_rport, 380 0, rts_input_handler); 381 pmsg->nm_packet = m; 382 pmsg->nm_netmsg.nm_lmsg.u.ms_result = family; 383 m->m_pkthdr.header = skip; /* XXX steal field in pkthdr */ 384 lwkt_sendmsg(port, &pmsg->nm_netmsg.nm_lmsg); 385 } 386 387 static __inline void 388 rts_input(struct mbuf *m, sa_family_t family) 389 { 390 rts_input_skip(m, family, NULL); 391 } 392 393 static void * 394 reallocbuf(void *ptr, size_t len, size_t olen) 395 { 396 void *newptr; 397 398 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 399 if (newptr == NULL) 400 return NULL; 401 bcopy(ptr, newptr, olen); 402 kfree(ptr, M_RTABLE); 403 return (newptr); 404 } 405 406 /* 407 * Internal helper routine for route_output(). 408 */ 409 static int 410 fillrtmsg(struct rt_msghdr **prtm, struct rtentry *rt, 411 struct rt_addrinfo *rtinfo) 412 { 413 int msglen; 414 struct rt_msghdr *rtm = *prtm; 415 416 /* Fill in rt_addrinfo for call to rt_msg_buffer(). */ 417 rtinfo->rti_dst = rt_key(rt); 418 rtinfo->rti_gateway = rt->rt_gateway; 419 rtinfo->rti_netmask = rt_mask(rt); /* might be NULL */ 420 rtinfo->rti_genmask = rt->rt_genmask; /* might be NULL */ 421 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 422 if (rt->rt_ifp != NULL) { 423 rtinfo->rti_ifpaddr = 424 TAILQ_FIRST(&rt->rt_ifp->if_addrheads[mycpuid]) 425 ->ifa->ifa_addr; 426 rtinfo->rti_ifaaddr = rt->rt_ifa->ifa_addr; 427 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 428 rtinfo->rti_bcastaddr = rt->rt_ifa->ifa_dstaddr; 429 rtm->rtm_index = rt->rt_ifp->if_index; 430 } else { 431 rtinfo->rti_ifpaddr = NULL; 432 rtinfo->rti_ifaaddr = NULL; 433 } 434 } else if (rt->rt_ifp != NULL) { 435 rtm->rtm_index = rt->rt_ifp->if_index; 436 } 437 438 msglen = rt_msgsize(rtm->rtm_type, rtinfo); 439 if (rtm->rtm_msglen < msglen) { 440 rtm = reallocbuf(rtm, msglen, rtm->rtm_msglen); 441 if (rtm == NULL) 442 return (ENOBUFS); 443 *prtm = rtm; 444 } 445 rt_msg_buffer(rtm->rtm_type, rtinfo, rtm, msglen); 446 447 rtm->rtm_flags = rt->rt_flags; 448 rtm->rtm_rmx = rt->rt_rmx; 449 rtm->rtm_addrs = rtinfo->rti_addrs; 450 451 return (0); 452 } 453 454 static void route_output_add_callback(int, int, struct rt_addrinfo *, 455 struct rtentry *, void *); 456 static void route_output_delete_callback(int, int, struct rt_addrinfo *, 457 struct rtentry *, void *); 458 static int route_output_get_callback(int, struct rt_addrinfo *, 459 struct rtentry *, void *, int); 460 static int route_output_change_callback(int, struct rt_addrinfo *, 461 struct rtentry *, void *, int); 462 static int route_output_lock_callback(int, struct rt_addrinfo *, 463 struct rtentry *, void *, int); 464 465 /*ARGSUSED*/ 466 static int 467 route_output(struct mbuf *m, struct socket *so, ...) 468 { 469 struct rt_msghdr *rtm = NULL; 470 struct rawcb *rp = NULL; 471 struct pr_output_info *oi; 472 struct rt_addrinfo rtinfo; 473 int len, error = 0; 474 __va_list ap; 475 476 M_ASSERTPKTHDR(m); 477 478 __va_start(ap, so); 479 oi = __va_arg(ap, struct pr_output_info *); 480 __va_end(ap); 481 482 #define gotoerr(e) { error = e; goto flush;} 483 484 if (m == NULL || 485 (m->m_len < sizeof(long) && 486 (m = m_pullup(m, sizeof(long))) == NULL)) 487 return (ENOBUFS); 488 len = m->m_pkthdr.len; 489 if (len < sizeof(struct rt_msghdr) || 490 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 491 rtinfo.rti_dst = NULL; 492 gotoerr(EINVAL); 493 } 494 rtm = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 495 if (rtm == NULL) { 496 rtinfo.rti_dst = NULL; 497 gotoerr(ENOBUFS); 498 } 499 m_copydata(m, 0, len, (caddr_t)rtm); 500 if (rtm->rtm_version != RTM_VERSION) { 501 rtinfo.rti_dst = NULL; 502 gotoerr(EPROTONOSUPPORT); 503 } 504 rtm->rtm_pid = oi->p_pid; 505 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 506 rtinfo.rti_addrs = rtm->rtm_addrs; 507 if (rt_xaddrs((char *)(rtm + 1), (char *)rtm + len, &rtinfo) != 0) { 508 rtinfo.rti_dst = NULL; 509 gotoerr(EINVAL); 510 } 511 rtinfo.rti_flags = rtm->rtm_flags; 512 if (rtinfo.rti_dst == NULL || rtinfo.rti_dst->sa_family >= AF_MAX || 513 (rtinfo.rti_gateway && rtinfo.rti_gateway->sa_family >= AF_MAX)) 514 gotoerr(EINVAL); 515 516 if (rtinfo.rti_genmask != NULL) { 517 error = rtmask_add_global(rtinfo.rti_genmask); 518 if (error) 519 goto flush; 520 } 521 522 /* 523 * Verify that the caller has the appropriate privilege; RTM_GET 524 * is the only operation the non-superuser is allowed. 525 */ 526 if (rtm->rtm_type != RTM_GET && 527 priv_check_cred(so->so_cred, PRIV_ROOT, 0) != 0) 528 gotoerr(EPERM); 529 530 switch (rtm->rtm_type) { 531 case RTM_ADD: 532 if (rtinfo.rti_gateway == NULL) { 533 error = EINVAL; 534 } else { 535 error = rtrequest1_global(RTM_ADD, &rtinfo, 536 route_output_add_callback, rtm); 537 } 538 break; 539 case RTM_DELETE: 540 /* 541 * note: &rtm passed as argument so 'rtm' can be replaced. 542 */ 543 error = rtrequest1_global(RTM_DELETE, &rtinfo, 544 route_output_delete_callback, &rtm); 545 break; 546 case RTM_GET: 547 /* 548 * note: &rtm passed as argument so 'rtm' can be replaced. 549 */ 550 error = rtsearch_global(RTM_GET, &rtinfo, 551 route_output_get_callback, &rtm, 552 RTS_NOEXACTMATCH); 553 break; 554 case RTM_CHANGE: 555 error = rtsearch_global(RTM_CHANGE, &rtinfo, 556 route_output_change_callback, rtm, 557 RTS_EXACTMATCH); 558 break; 559 case RTM_LOCK: 560 error = rtsearch_global(RTM_LOCK, &rtinfo, 561 route_output_lock_callback, rtm, 562 RTS_EXACTMATCH); 563 break; 564 default: 565 error = EOPNOTSUPP; 566 break; 567 } 568 569 flush: 570 if (rtm != NULL) { 571 if (error != 0) 572 rtm->rtm_errno = error; 573 else 574 rtm->rtm_flags |= RTF_DONE; 575 } 576 577 /* 578 * Check to see if we don't want our own messages. 579 */ 580 if (!(so->so_options & SO_USELOOPBACK)) { 581 if (route_cb.any_count <= 1) { 582 if (rtm != NULL) 583 kfree(rtm, M_RTABLE); 584 m_freem(m); 585 return (error); 586 } 587 /* There is another listener, so construct message */ 588 rp = sotorawcb(so); 589 } 590 if (rtm != NULL) { 591 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 592 if (m->m_pkthdr.len < rtm->rtm_msglen) { 593 m_freem(m); 594 m = NULL; 595 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 596 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 597 kfree(rtm, M_RTABLE); 598 } 599 if (m != NULL) 600 rts_input_skip(m, familyof(rtinfo.rti_dst), rp); 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 if (rtinfo->rti_genmask != NULL) { 617 rt->rt_genmask = rtmask_purelookup(rtinfo->rti_genmask); 618 if (rt->rt_genmask == NULL) { 619 /* 620 * This should not happen, since we 621 * have already installed genmask 622 * on each CPU before we reach here. 623 */ 624 panic("genmask is gone!?"); 625 } 626 } else { 627 rt->rt_genmask = NULL; 628 } 629 rtm->rtm_index = rt->rt_ifp->if_index; 630 } 631 } 632 633 static void 634 route_output_delete_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 635 struct rtentry *rt, void *arg) 636 { 637 struct rt_msghdr **rtm = arg; 638 639 if (error == 0 && rt) { 640 ++rt->rt_refcnt; 641 if (fillrtmsg(rtm, rt, rtinfo) != 0) { 642 error = ENOBUFS; 643 /* XXX no way to return the error */ 644 } 645 --rt->rt_refcnt; 646 } 647 } 648 649 static int 650 route_output_get_callback(int cmd, struct rt_addrinfo *rtinfo, 651 struct rtentry *rt, void *arg, int found_cnt) 652 { 653 struct rt_msghdr **rtm = arg; 654 int error, found = 0; 655 656 if (((rtinfo->rti_flags ^ rt->rt_flags) & RTF_HOST) == 0) 657 found = 1; 658 659 error = fillrtmsg(rtm, rt, rtinfo); 660 if (!error && found) { 661 /* Got the exact match, we could return now! */ 662 error = EJUSTRETURN; 663 } 664 return error; 665 } 666 667 static int 668 route_output_change_callback(int cmd, struct rt_addrinfo *rtinfo, 669 struct rtentry *rt, void *arg, int found_cnt) 670 { 671 struct rt_msghdr *rtm = arg; 672 struct ifaddr *ifa; 673 int error = 0; 674 675 /* 676 * new gateway could require new ifaddr, ifp; 677 * flags may also be different; ifp may be specified 678 * by ll sockaddr when protocol address is ambiguous 679 */ 680 if (((rt->rt_flags & RTF_GATEWAY) && rtinfo->rti_gateway != NULL) || 681 rtinfo->rti_ifpaddr != NULL || 682 (rtinfo->rti_ifaaddr != NULL && 683 !sa_equal(rtinfo->rti_ifaaddr, rt->rt_ifa->ifa_addr))) { 684 error = rt_getifa(rtinfo); 685 if (error != 0) 686 goto done; 687 } 688 if (rtinfo->rti_gateway != NULL) { 689 /* 690 * We only need to generate rtmsg upon the 691 * first route to be changed. 692 */ 693 error = rt_setgate(rt, rt_key(rt), rtinfo->rti_gateway, 694 found_cnt == 1 ? RTL_REPORTMSG : RTL_DONTREPORT); 695 if (error != 0) 696 goto done; 697 } 698 if ((ifa = rtinfo->rti_ifa) != NULL) { 699 struct ifaddr *oifa = rt->rt_ifa; 700 701 if (oifa != ifa) { 702 if (oifa && oifa->ifa_rtrequest) 703 oifa->ifa_rtrequest(RTM_DELETE, rt, rtinfo); 704 IFAFREE(rt->rt_ifa); 705 IFAREF(ifa); 706 rt->rt_ifa = ifa; 707 rt->rt_ifp = rtinfo->rti_ifp; 708 } 709 } 710 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, &rt->rt_rmx); 711 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 712 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, rtinfo); 713 if (rtinfo->rti_genmask != NULL) { 714 rt->rt_genmask = rtmask_purelookup(rtinfo->rti_genmask); 715 if (rt->rt_genmask == NULL) { 716 /* 717 * This should not happen, since we 718 * have already installed genmask 719 * on each CPU before we reach here. 720 */ 721 panic("genmask is gone!?\n"); 722 } 723 } 724 rtm->rtm_index = rt->rt_ifp->if_index; 725 done: 726 return error; 727 } 728 729 static int 730 route_output_lock_callback(int cmd, struct rt_addrinfo *rtinfo, 731 struct rtentry *rt, void *arg, 732 int found_cnt __unused) 733 { 734 struct rt_msghdr *rtm = arg; 735 736 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 737 rt->rt_rmx.rmx_locks |= 738 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 739 return 0; 740 } 741 742 static void 743 rt_setmetrics(u_long which, struct rt_metrics *in, struct rt_metrics *out) 744 { 745 #define setmetric(flag, elt) if (which & (flag)) out->elt = in->elt; 746 setmetric(RTV_RPIPE, rmx_recvpipe); 747 setmetric(RTV_SPIPE, rmx_sendpipe); 748 setmetric(RTV_SSTHRESH, rmx_ssthresh); 749 setmetric(RTV_RTT, rmx_rtt); 750 setmetric(RTV_RTTVAR, rmx_rttvar); 751 setmetric(RTV_HOPCOUNT, rmx_hopcount); 752 setmetric(RTV_MTU, rmx_mtu); 753 setmetric(RTV_EXPIRE, rmx_expire); 754 #undef setmetric 755 } 756 757 #define ROUNDUP(a) \ 758 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 759 760 /* 761 * Extract the addresses of the passed sockaddrs. 762 * Do a little sanity checking so as to avoid bad memory references. 763 * This data is derived straight from userland. 764 */ 765 static int 766 rt_xaddrs(char *cp, char *cplim, struct rt_addrinfo *rtinfo) 767 { 768 struct sockaddr *sa; 769 int i; 770 771 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 772 if ((rtinfo->rti_addrs & (1 << i)) == 0) 773 continue; 774 sa = (struct sockaddr *)cp; 775 /* 776 * It won't fit. 777 */ 778 if ((cp + sa->sa_len) > cplim) { 779 return (EINVAL); 780 } 781 782 /* 783 * There are no more... Quit now. 784 * If there are more bits, they are in error. 785 * I've seen this. route(1) can evidently generate these. 786 * This causes kernel to core dump. 787 * For compatibility, if we see this, point to a safe address. 788 */ 789 if (sa->sa_len == 0) { 790 static struct sockaddr sa_zero = { 791 sizeof sa_zero, AF_INET, 792 }; 793 794 rtinfo->rti_info[i] = &sa_zero; 795 kprintf("rtsock: received more addr bits than sockaddrs.\n"); 796 return (0); /* should be EINVAL but for compat */ 797 } 798 799 /* Accept the sockaddr. */ 800 rtinfo->rti_info[i] = sa; 801 cp += ROUNDUP(sa->sa_len); 802 } 803 return (0); 804 } 805 806 static int 807 rt_msghdrsize(int type) 808 { 809 switch (type) { 810 case RTM_DELADDR: 811 case RTM_NEWADDR: 812 return sizeof(struct ifa_msghdr); 813 case RTM_DELMADDR: 814 case RTM_NEWMADDR: 815 return sizeof(struct ifma_msghdr); 816 case RTM_IFINFO: 817 return sizeof(struct if_msghdr); 818 case RTM_IFANNOUNCE: 819 case RTM_IEEE80211: 820 return sizeof(struct if_announcemsghdr); 821 default: 822 return sizeof(struct rt_msghdr); 823 } 824 } 825 826 static int 827 rt_msgsize(int type, struct rt_addrinfo *rtinfo) 828 { 829 int len, i; 830 831 len = rt_msghdrsize(type); 832 for (i = 0; i < RTAX_MAX; i++) { 833 if (rtinfo->rti_info[i] != NULL) 834 len += ROUNDUP(rtinfo->rti_info[i]->sa_len); 835 } 836 len = ALIGN(len); 837 return len; 838 } 839 840 /* 841 * Build a routing message in a buffer. 842 * Copy the addresses in the rtinfo->rti_info[] sockaddr array 843 * to the end of the buffer after the message header. 844 * 845 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[]. 846 * This side-effect can be avoided if we reorder the addrs bitmask field in all 847 * the route messages to line up so we can set it here instead of back in the 848 * calling routine. 849 */ 850 static void 851 rt_msg_buffer(int type, struct rt_addrinfo *rtinfo, void *buf, int msglen) 852 { 853 struct rt_msghdr *rtm; 854 char *cp; 855 int dlen, i; 856 857 rtm = (struct rt_msghdr *) buf; 858 rtm->rtm_version = RTM_VERSION; 859 rtm->rtm_type = type; 860 rtm->rtm_msglen = msglen; 861 862 cp = (char *)buf + rt_msghdrsize(type); 863 rtinfo->rti_addrs = 0; 864 for (i = 0; i < RTAX_MAX; i++) { 865 struct sockaddr *sa; 866 867 if ((sa = rtinfo->rti_info[i]) == NULL) 868 continue; 869 rtinfo->rti_addrs |= (1 << i); 870 dlen = ROUNDUP(sa->sa_len); 871 bcopy(sa, cp, dlen); 872 cp += dlen; 873 } 874 } 875 876 /* 877 * Build a routing message in a mbuf chain. 878 * Copy the addresses in the rtinfo->rti_info[] sockaddr array 879 * to the end of the mbuf after the message header. 880 * 881 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[]. 882 * This side-effect can be avoided if we reorder the addrs bitmask field in all 883 * the route messages to line up so we can set it here instead of back in the 884 * calling routine. 885 */ 886 static struct mbuf * 887 rt_msg_mbuf(int type, struct rt_addrinfo *rtinfo) 888 { 889 struct mbuf *m; 890 struct rt_msghdr *rtm; 891 int hlen, len; 892 int i; 893 894 hlen = rt_msghdrsize(type); 895 KASSERT(hlen <= MCLBYTES, ("rt_msg_mbuf: hlen %d doesn't fit", hlen)); 896 897 m = m_getl(hlen, MB_DONTWAIT, MT_DATA, M_PKTHDR, NULL); 898 if (m == NULL) 899 return (NULL); 900 mbuftrackid(m, 32); 901 m->m_pkthdr.len = m->m_len = hlen; 902 m->m_pkthdr.rcvif = NULL; 903 rtinfo->rti_addrs = 0; 904 len = hlen; 905 for (i = 0; i < RTAX_MAX; i++) { 906 struct sockaddr *sa; 907 int dlen; 908 909 if ((sa = rtinfo->rti_info[i]) == NULL) 910 continue; 911 rtinfo->rti_addrs |= (1 << i); 912 dlen = ROUNDUP(sa->sa_len); 913 m_copyback(m, len, dlen, (caddr_t)sa); /* can grow mbuf chain */ 914 len += dlen; 915 } 916 if (m->m_pkthdr.len != len) { /* one of the m_copyback() calls failed */ 917 m_freem(m); 918 return (NULL); 919 } 920 rtm = mtod(m, struct rt_msghdr *); 921 bzero(rtm, hlen); 922 rtm->rtm_msglen = len; 923 rtm->rtm_version = RTM_VERSION; 924 rtm->rtm_type = type; 925 return (m); 926 } 927 928 /* 929 * This routine is called to generate a message from the routing 930 * socket indicating that a redirect has occurred, a routing lookup 931 * has failed, or that a protocol has detected timeouts to a particular 932 * destination. 933 */ 934 void 935 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error) 936 { 937 struct sockaddr *dst = rtinfo->rti_info[RTAX_DST]; 938 struct rt_msghdr *rtm; 939 struct mbuf *m; 940 941 if (route_cb.any_count == 0) 942 return; 943 m = rt_msg_mbuf(type, rtinfo); 944 if (m == NULL) 945 return; 946 rtm = mtod(m, struct rt_msghdr *); 947 rtm->rtm_flags = RTF_DONE | flags; 948 rtm->rtm_errno = error; 949 rtm->rtm_addrs = rtinfo->rti_addrs; 950 rts_input(m, familyof(dst)); 951 } 952 953 void 954 rt_dstmsg(int type, struct sockaddr *dst, int error) 955 { 956 struct rt_msghdr *rtm; 957 struct rt_addrinfo addrs; 958 struct mbuf *m; 959 960 if (route_cb.any_count == 0) 961 return; 962 bzero(&addrs, sizeof(struct rt_addrinfo)); 963 addrs.rti_info[RTAX_DST] = dst; 964 m = rt_msg_mbuf(type, &addrs); 965 if (m == NULL) 966 return; 967 rtm = mtod(m, struct rt_msghdr *); 968 rtm->rtm_flags = RTF_DONE; 969 rtm->rtm_errno = error; 970 rtm->rtm_addrs = addrs.rti_addrs; 971 rts_input(m, familyof(dst)); 972 } 973 974 /* 975 * This routine is called to generate a message from the routing 976 * socket indicating that the status of a network interface has changed. 977 */ 978 void 979 rt_ifmsg(struct ifnet *ifp) 980 { 981 struct if_msghdr *ifm; 982 struct mbuf *m; 983 struct rt_addrinfo rtinfo; 984 985 if (route_cb.any_count == 0) 986 return; 987 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 988 m = rt_msg_mbuf(RTM_IFINFO, &rtinfo); 989 if (m == NULL) 990 return; 991 ifm = mtod(m, struct if_msghdr *); 992 ifm->ifm_index = ifp->if_index; 993 ifm->ifm_flags = ifp->if_flags; 994 ifm->ifm_data = ifp->if_data; 995 ifm->ifm_addrs = 0; 996 rts_input(m, 0); 997 } 998 999 static void 1000 rt_ifamsg(int cmd, struct ifaddr *ifa) 1001 { 1002 struct ifa_msghdr *ifam; 1003 struct rt_addrinfo rtinfo; 1004 struct mbuf *m; 1005 struct ifnet *ifp = ifa->ifa_ifp; 1006 1007 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1008 rtinfo.rti_ifaaddr = ifa->ifa_addr; 1009 rtinfo.rti_ifpaddr = 1010 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr; 1011 rtinfo.rti_netmask = ifa->ifa_netmask; 1012 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr; 1013 1014 m = rt_msg_mbuf(cmd, &rtinfo); 1015 if (m == NULL) 1016 return; 1017 1018 ifam = mtod(m, struct ifa_msghdr *); 1019 ifam->ifam_index = ifp->if_index; 1020 ifam->ifam_metric = ifa->ifa_metric; 1021 ifam->ifam_flags = ifa->ifa_flags; 1022 ifam->ifam_addrs = rtinfo.rti_addrs; 1023 1024 rts_input(m, familyof(ifa->ifa_addr)); 1025 } 1026 1027 void 1028 rt_rtmsg(int cmd, struct rtentry *rt, struct ifnet *ifp, int error) 1029 { 1030 struct rt_msghdr *rtm; 1031 struct rt_addrinfo rtinfo; 1032 struct mbuf *m; 1033 struct sockaddr *dst; 1034 1035 if (rt == NULL) 1036 return; 1037 1038 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1039 rtinfo.rti_dst = dst = rt_key(rt); 1040 rtinfo.rti_gateway = rt->rt_gateway; 1041 rtinfo.rti_netmask = rt_mask(rt); 1042 if (ifp != NULL) { 1043 rtinfo.rti_ifpaddr = 1044 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr; 1045 } 1046 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr; 1047 1048 m = rt_msg_mbuf(cmd, &rtinfo); 1049 if (m == NULL) 1050 return; 1051 1052 rtm = mtod(m, struct rt_msghdr *); 1053 if (ifp != NULL) 1054 rtm->rtm_index = ifp->if_index; 1055 rtm->rtm_flags |= rt->rt_flags; 1056 rtm->rtm_errno = error; 1057 rtm->rtm_addrs = rtinfo.rti_addrs; 1058 1059 rts_input(m, familyof(dst)); 1060 } 1061 1062 /* 1063 * This is called to generate messages from the routing socket 1064 * indicating a network interface has had addresses associated with it. 1065 * if we ever reverse the logic and replace messages TO the routing 1066 * socket indicate a request to configure interfaces, then it will 1067 * be unnecessary as the routing socket will automatically generate 1068 * copies of it. 1069 */ 1070 void 1071 rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt) 1072 { 1073 #ifdef SCTP 1074 /* 1075 * notify the SCTP stack 1076 * this will only get called when an address is added/deleted 1077 * XXX pass the ifaddr struct instead if ifa->ifa_addr... 1078 */ 1079 if (cmd == RTM_ADD) 1080 sctp_add_ip_address(ifa); 1081 else if (cmd == RTM_DELETE) 1082 sctp_delete_ip_address(ifa); 1083 #endif /* SCTP */ 1084 1085 if (route_cb.any_count == 0) 1086 return; 1087 1088 if (cmd == RTM_ADD) { 1089 rt_ifamsg(RTM_NEWADDR, ifa); 1090 rt_rtmsg(RTM_ADD, rt, ifa->ifa_ifp, error); 1091 } else { 1092 KASSERT((cmd == RTM_DELETE), ("unknown cmd %d", cmd)); 1093 rt_rtmsg(RTM_DELETE, rt, ifa->ifa_ifp, error); 1094 rt_ifamsg(RTM_DELADDR, ifa); 1095 } 1096 } 1097 1098 /* 1099 * This is the analogue to the rt_newaddrmsg which performs the same 1100 * function but for multicast group memberhips. This is easier since 1101 * there is no route state to worry about. 1102 */ 1103 void 1104 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma) 1105 { 1106 struct rt_addrinfo rtinfo; 1107 struct mbuf *m = NULL; 1108 struct ifnet *ifp = ifma->ifma_ifp; 1109 struct ifma_msghdr *ifmam; 1110 1111 if (route_cb.any_count == 0) 1112 return; 1113 1114 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1115 rtinfo.rti_ifaaddr = ifma->ifma_addr; 1116 if (ifp != NULL && !TAILQ_EMPTY(&ifp->if_addrheads[mycpuid])) { 1117 rtinfo.rti_ifpaddr = 1118 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr; 1119 } 1120 /* 1121 * If a link-layer address is present, present it as a ``gateway'' 1122 * (similarly to how ARP entries, e.g., are presented). 1123 */ 1124 rtinfo.rti_gateway = ifma->ifma_lladdr; 1125 1126 m = rt_msg_mbuf(cmd, &rtinfo); 1127 if (m == NULL) 1128 return; 1129 1130 ifmam = mtod(m, struct ifma_msghdr *); 1131 ifmam->ifmam_index = ifp->if_index; 1132 ifmam->ifmam_addrs = rtinfo.rti_addrs; 1133 1134 rts_input(m, familyof(ifma->ifma_addr)); 1135 } 1136 1137 static struct mbuf * 1138 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1139 struct rt_addrinfo *info) 1140 { 1141 struct if_announcemsghdr *ifan; 1142 struct mbuf *m; 1143 1144 if (route_cb.any_count == 0) 1145 return NULL; 1146 1147 bzero(info, sizeof(*info)); 1148 m = rt_msg_mbuf(type, info); 1149 if (m == NULL) 1150 return NULL; 1151 1152 ifan = mtod(m, struct if_announcemsghdr *); 1153 ifan->ifan_index = ifp->if_index; 1154 strlcpy(ifan->ifan_name, ifp->if_xname, sizeof ifan->ifan_name); 1155 ifan->ifan_what = what; 1156 return m; 1157 } 1158 1159 /* 1160 * This is called to generate routing socket messages indicating 1161 * IEEE80211 wireless events. 1162 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1163 */ 1164 void 1165 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len) 1166 { 1167 struct rt_addrinfo info; 1168 struct mbuf *m; 1169 1170 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1171 if (m == NULL) 1172 return; 1173 1174 /* 1175 * Append the ieee80211 data. Try to stick it in the 1176 * mbuf containing the ifannounce msg; otherwise allocate 1177 * a new mbuf and append. 1178 * 1179 * NB: we assume m is a single mbuf. 1180 */ 1181 if (data_len > M_TRAILINGSPACE(m)) { 1182 struct mbuf *n = m_get(MB_DONTWAIT, MT_DATA); 1183 if (n == NULL) { 1184 m_freem(m); 1185 return; 1186 } 1187 bcopy(data, mtod(n, void *), data_len); 1188 n->m_len = data_len; 1189 m->m_next = n; 1190 } else if (data_len > 0) { 1191 bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len); 1192 m->m_len += data_len; 1193 } 1194 mbuftrackid(m, 33); 1195 if (m->m_flags & M_PKTHDR) 1196 m->m_pkthdr.len += data_len; 1197 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len; 1198 rts_input(m, 0); 1199 } 1200 1201 /* 1202 * This is called to generate routing socket messages indicating 1203 * network interface arrival and departure. 1204 */ 1205 void 1206 rt_ifannouncemsg(struct ifnet *ifp, int what) 1207 { 1208 struct rt_addrinfo addrinfo; 1209 struct mbuf *m; 1210 1211 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &addrinfo); 1212 if (m != NULL) 1213 rts_input(m, 0); 1214 } 1215 1216 static int 1217 resizewalkarg(struct walkarg *w, int len) 1218 { 1219 void *newptr; 1220 1221 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 1222 if (newptr == NULL) 1223 return (ENOMEM); 1224 if (w->w_tmem != NULL) 1225 kfree(w->w_tmem, M_RTABLE); 1226 w->w_tmem = newptr; 1227 w->w_tmemsize = len; 1228 return (0); 1229 } 1230 1231 /* 1232 * This is used in dumping the kernel table via sysctl(). 1233 */ 1234 int 1235 sysctl_dumpentry(struct radix_node *rn, void *vw) 1236 { 1237 struct walkarg *w = vw; 1238 struct rtentry *rt = (struct rtentry *)rn; 1239 struct rt_addrinfo rtinfo; 1240 int error, msglen; 1241 1242 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1243 return 0; 1244 1245 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1246 rtinfo.rti_dst = rt_key(rt); 1247 rtinfo.rti_gateway = rt->rt_gateway; 1248 rtinfo.rti_netmask = rt_mask(rt); 1249 rtinfo.rti_genmask = rt->rt_genmask; 1250 if (rt->rt_ifp != NULL) { 1251 rtinfo.rti_ifpaddr = 1252 TAILQ_FIRST(&rt->rt_ifp->if_addrheads[mycpuid])->ifa->ifa_addr; 1253 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr; 1254 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1255 rtinfo.rti_bcastaddr = rt->rt_ifa->ifa_dstaddr; 1256 } 1257 msglen = rt_msgsize(RTM_GET, &rtinfo); 1258 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0) 1259 return (ENOMEM); 1260 rt_msg_buffer(RTM_GET, &rtinfo, w->w_tmem, msglen); 1261 if (w->w_req != NULL) { 1262 struct rt_msghdr *rtm = w->w_tmem; 1263 1264 rtm->rtm_flags = rt->rt_flags; 1265 rtm->rtm_use = rt->rt_use; 1266 rtm->rtm_rmx = rt->rt_rmx; 1267 rtm->rtm_index = rt->rt_ifp->if_index; 1268 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1269 rtm->rtm_addrs = rtinfo.rti_addrs; 1270 error = SYSCTL_OUT(w->w_req, rtm, msglen); 1271 return (error); 1272 } 1273 return (0); 1274 } 1275 1276 static int 1277 sysctl_iflist(int af, struct walkarg *w) 1278 { 1279 struct ifnet *ifp; 1280 struct rt_addrinfo rtinfo; 1281 int msglen, error; 1282 1283 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1284 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1285 struct ifaddr_container *ifac; 1286 struct ifaddr *ifa; 1287 1288 if (w->w_arg && w->w_arg != ifp->if_index) 1289 continue; 1290 ifac = TAILQ_FIRST(&ifp->if_addrheads[mycpuid]); 1291 ifa = ifac->ifa; 1292 rtinfo.rti_ifpaddr = ifa->ifa_addr; 1293 msglen = rt_msgsize(RTM_IFINFO, &rtinfo); 1294 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0) 1295 return (ENOMEM); 1296 rt_msg_buffer(RTM_IFINFO, &rtinfo, w->w_tmem, msglen); 1297 rtinfo.rti_ifpaddr = NULL; 1298 if (w->w_req != NULL && w->w_tmem != NULL) { 1299 struct if_msghdr *ifm = w->w_tmem; 1300 1301 ifm->ifm_index = ifp->if_index; 1302 ifm->ifm_flags = ifp->if_flags; 1303 ifm->ifm_data = ifp->if_data; 1304 ifm->ifm_addrs = rtinfo.rti_addrs; 1305 error = SYSCTL_OUT(w->w_req, ifm, msglen); 1306 if (error) 1307 return (error); 1308 } 1309 while ((ifac = TAILQ_NEXT(ifac, ifa_link)) != NULL) { 1310 ifa = ifac->ifa; 1311 1312 if (af && af != ifa->ifa_addr->sa_family) 1313 continue; 1314 if (curproc->p_ucred->cr_prison && 1315 prison_if(curproc->p_ucred, ifa->ifa_addr)) 1316 continue; 1317 rtinfo.rti_ifaaddr = ifa->ifa_addr; 1318 rtinfo.rti_netmask = ifa->ifa_netmask; 1319 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr; 1320 msglen = rt_msgsize(RTM_NEWADDR, &rtinfo); 1321 if (w->w_tmemsize < msglen && 1322 resizewalkarg(w, msglen) != 0) 1323 return (ENOMEM); 1324 rt_msg_buffer(RTM_NEWADDR, &rtinfo, w->w_tmem, msglen); 1325 if (w->w_req != NULL) { 1326 struct ifa_msghdr *ifam = w->w_tmem; 1327 1328 ifam->ifam_index = ifa->ifa_ifp->if_index; 1329 ifam->ifam_flags = ifa->ifa_flags; 1330 ifam->ifam_metric = ifa->ifa_metric; 1331 ifam->ifam_addrs = rtinfo.rti_addrs; 1332 error = SYSCTL_OUT(w->w_req, w->w_tmem, msglen); 1333 if (error) 1334 return (error); 1335 } 1336 } 1337 rtinfo.rti_netmask = NULL; 1338 rtinfo.rti_ifaaddr = NULL; 1339 rtinfo.rti_bcastaddr = NULL; 1340 } 1341 return (0); 1342 } 1343 1344 static int 1345 sysctl_rtsock(SYSCTL_HANDLER_ARGS) 1346 { 1347 int *name = (int *)arg1; 1348 u_int namelen = arg2; 1349 struct radix_node_head *rnh; 1350 int i, error = EINVAL; 1351 int origcpu; 1352 u_char af; 1353 struct walkarg w; 1354 1355 name ++; 1356 namelen--; 1357 if (req->newptr) 1358 return (EPERM); 1359 if (namelen != 3 && namelen != 4) 1360 return (EINVAL); 1361 af = name[0]; 1362 bzero(&w, sizeof w); 1363 w.w_op = name[1]; 1364 w.w_arg = name[2]; 1365 w.w_req = req; 1366 1367 /* 1368 * Optional third argument specifies cpu, used primarily for 1369 * debugging the route table. 1370 */ 1371 if (namelen == 4) { 1372 if (name[3] < 0 || name[3] >= ncpus) 1373 return (EINVAL); 1374 origcpu = mycpuid; 1375 lwkt_migratecpu(name[3]); 1376 } else { 1377 origcpu = -1; 1378 } 1379 crit_enter(); 1380 switch (w.w_op) { 1381 case NET_RT_DUMP: 1382 case NET_RT_FLAGS: 1383 for (i = 1; i <= AF_MAX; i++) 1384 if ((rnh = rt_tables[mycpuid][i]) && 1385 (af == 0 || af == i) && 1386 (error = rnh->rnh_walktree(rnh, 1387 sysctl_dumpentry, &w))) 1388 break; 1389 break; 1390 1391 case NET_RT_IFLIST: 1392 error = sysctl_iflist(af, &w); 1393 } 1394 crit_exit(); 1395 if (w.w_tmem != NULL) 1396 kfree(w.w_tmem, M_RTABLE); 1397 if (origcpu >= 0) 1398 lwkt_migratecpu(origcpu); 1399 return (error); 1400 } 1401 1402 SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, ""); 1403 1404 /* 1405 * Definitions of protocols supported in the ROUTE domain. 1406 */ 1407 1408 static struct domain routedomain; /* or at least forward */ 1409 1410 static struct protosw routesw[] = { 1411 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 1412 0, route_output, raw_ctlinput, 0, 1413 cpu0_soport, cpu0_ctlport, 1414 raw_init, 0, 0, 0, 1415 &route_usrreqs 1416 } 1417 }; 1418 1419 static struct domain routedomain = { 1420 PF_ROUTE, "route", NULL, NULL, NULL, 1421 routesw, &routesw[(sizeof routesw)/(sizeof routesw[0])], 1422 }; 1423 1424 DOMAIN_SET(route); 1425 1426