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 85 #include <sys/thread2.h> 86 #include <sys/socketvar2.h> 87 88 #include <net/if.h> 89 #include <net/route.h> 90 #include <net/raw_cb.h> 91 #include <net/netmsg2.h> 92 93 #ifdef SCTP 94 extern void sctp_add_ip_address(struct ifaddr *ifa); 95 extern void sctp_delete_ip_address(struct ifaddr *ifa); 96 #endif /* SCTP */ 97 98 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables"); 99 100 static struct route_cb { 101 int ip_count; 102 int ip6_count; 103 int ipx_count; 104 int ns_count; 105 int any_count; 106 } route_cb; 107 108 static const struct sockaddr route_src = { 2, PF_ROUTE, }; 109 110 struct walkarg { 111 int w_tmemsize; 112 int w_op, w_arg; 113 void *w_tmem; 114 struct sysctl_req *w_req; 115 }; 116 117 static struct mbuf * 118 rt_msg_mbuf (int, struct rt_addrinfo *); 119 static void rt_msg_buffer (int, struct rt_addrinfo *, void *buf, int len); 120 static int rt_msgsize (int type, struct rt_addrinfo *rtinfo); 121 static int rt_xaddrs (char *, char *, struct rt_addrinfo *); 122 static int sysctl_dumpentry (struct radix_node *rn, void *vw); 123 static int sysctl_iflist (int af, struct walkarg *w); 124 static int route_output(struct mbuf *, struct socket *, ...); 125 static void rt_setmetrics (u_long, struct rt_metrics *, 126 struct rt_metrics *); 127 128 /* 129 * It really doesn't make any sense at all for this code to share much 130 * with raw_usrreq.c, since its functionality is so restricted. XXX 131 */ 132 static void 133 rts_abort(netmsg_t msg) 134 { 135 crit_enter(); 136 raw_usrreqs.pru_abort(msg); 137 /* msg invalid now */ 138 crit_exit(); 139 } 140 141 /* pru_accept is EOPNOTSUPP */ 142 143 static void 144 rts_attach(netmsg_t msg) 145 { 146 struct socket *so = msg->base.nm_so; 147 struct pru_attach_info *ai = msg->attach.nm_ai; 148 struct rawcb *rp; 149 int proto = msg->attach.nm_proto; 150 int error; 151 152 crit_enter(); 153 if (sotorawcb(so) != NULL) { 154 error = EISCONN; 155 goto done; 156 } 157 158 rp = kmalloc(sizeof *rp, M_PCB, M_WAITOK | M_ZERO); 159 160 /* 161 * The critical section is necessary to block protocols from sending 162 * error notifications (like RTM_REDIRECT or RTM_LOSING) while 163 * this PCB is extant but incompletely initialized. 164 * Probably we should try to do more of this work beforehand and 165 * eliminate the critical section. 166 */ 167 so->so_pcb = rp; 168 soreference(so); /* so_pcb assignment */ 169 error = raw_attach(so, proto, ai->sb_rlimit); 170 rp = sotorawcb(so); 171 if (error) { 172 kfree(rp, M_PCB); 173 goto done; 174 } 175 switch(rp->rcb_proto.sp_protocol) { 176 case AF_INET: 177 route_cb.ip_count++; 178 break; 179 case AF_INET6: 180 route_cb.ip6_count++; 181 break; 182 case AF_IPX: 183 route_cb.ipx_count++; 184 break; 185 case AF_NS: 186 route_cb.ns_count++; 187 break; 188 } 189 rp->rcb_faddr = &route_src; 190 route_cb.any_count++; 191 soisconnected(so); 192 so->so_options |= SO_USELOOPBACK; 193 error = 0; 194 done: 195 crit_exit(); 196 lwkt_replymsg(&msg->lmsg, error); 197 } 198 199 static void 200 rts_bind(netmsg_t msg) 201 { 202 crit_enter(); 203 raw_usrreqs.pru_bind(msg); /* xxx just EINVAL */ 204 /* msg invalid now */ 205 crit_exit(); 206 } 207 208 static void 209 rts_connect(netmsg_t msg) 210 { 211 crit_enter(); 212 raw_usrreqs.pru_connect(msg); /* XXX just EINVAL */ 213 /* msg invalid now */ 214 crit_exit(); 215 } 216 217 /* pru_connect2 is EOPNOTSUPP */ 218 /* pru_control is EOPNOTSUPP */ 219 220 static void 221 rts_detach(netmsg_t msg) 222 { 223 struct socket *so = msg->base.nm_so; 224 struct rawcb *rp = sotorawcb(so); 225 226 crit_enter(); 227 if (rp != NULL) { 228 switch(rp->rcb_proto.sp_protocol) { 229 case AF_INET: 230 route_cb.ip_count--; 231 break; 232 case AF_INET6: 233 route_cb.ip6_count--; 234 break; 235 case AF_IPX: 236 route_cb.ipx_count--; 237 break; 238 case AF_NS: 239 route_cb.ns_count--; 240 break; 241 } 242 route_cb.any_count--; 243 } 244 raw_usrreqs.pru_detach(msg); 245 /* msg invalid now */ 246 crit_exit(); 247 } 248 249 static void 250 rts_disconnect(netmsg_t msg) 251 { 252 crit_enter(); 253 raw_usrreqs.pru_disconnect(msg); 254 /* msg invalid now */ 255 crit_exit(); 256 } 257 258 /* pru_listen is EOPNOTSUPP */ 259 260 static void 261 rts_peeraddr(netmsg_t msg) 262 { 263 crit_enter(); 264 raw_usrreqs.pru_peeraddr(msg); 265 /* msg invalid now */ 266 crit_exit(); 267 } 268 269 /* pru_rcvd is EOPNOTSUPP */ 270 /* pru_rcvoob is EOPNOTSUPP */ 271 272 static void 273 rts_send(netmsg_t msg) 274 { 275 crit_enter(); 276 raw_usrreqs.pru_send(msg); 277 /* msg invalid now */ 278 crit_exit(); 279 } 280 281 /* pru_sense is null */ 282 283 static void 284 rts_shutdown(netmsg_t msg) 285 { 286 crit_enter(); 287 raw_usrreqs.pru_shutdown(msg); 288 /* msg invalid now */ 289 crit_exit(); 290 } 291 292 static void 293 rts_sockaddr(netmsg_t msg) 294 { 295 crit_enter(); 296 raw_usrreqs.pru_sockaddr(msg); 297 /* msg invalid now */ 298 crit_exit(); 299 } 300 301 static struct pr_usrreqs route_usrreqs = { 302 .pru_abort = rts_abort, 303 .pru_accept = pr_generic_notsupp, 304 .pru_attach = rts_attach, 305 .pru_bind = rts_bind, 306 .pru_connect = rts_connect, 307 .pru_connect2 = pr_generic_notsupp, 308 .pru_control = pr_generic_notsupp, 309 .pru_detach = rts_detach, 310 .pru_disconnect = rts_disconnect, 311 .pru_listen = pr_generic_notsupp, 312 .pru_peeraddr = rts_peeraddr, 313 .pru_rcvd = pr_generic_notsupp, 314 .pru_rcvoob = pr_generic_notsupp, 315 .pru_send = rts_send, 316 .pru_sense = pru_sense_null, 317 .pru_shutdown = rts_shutdown, 318 .pru_sockaddr = rts_sockaddr, 319 .pru_sosend = sosend, 320 .pru_soreceive = soreceive 321 }; 322 323 static __inline sa_family_t 324 familyof(struct sockaddr *sa) 325 { 326 return (sa != NULL ? sa->sa_family : 0); 327 } 328 329 /* 330 * Routing socket input function. The packet must be serialized onto cpu 0. 331 * We use the cpu0_soport() netisr processing loop to handle it. 332 * 333 * This looks messy but it means that anyone, including interrupt code, 334 * can send a message to the routing socket. 335 */ 336 static void 337 rts_input_handler(netmsg_t msg) 338 { 339 static const struct sockaddr route_dst = { 2, PF_ROUTE, }; 340 struct sockproto route_proto; 341 struct netmsg_packet *pmsg = &msg->packet; 342 struct mbuf *m; 343 sa_family_t family; 344 struct rawcb *skip; 345 346 family = pmsg->base.lmsg.u.ms_result; 347 route_proto.sp_family = PF_ROUTE; 348 route_proto.sp_protocol = family; 349 350 m = pmsg->nm_packet; 351 M_ASSERTPKTHDR(m); 352 353 skip = m->m_pkthdr.header; 354 m->m_pkthdr.header = NULL; 355 356 raw_input(m, &route_proto, &route_src, &route_dst, skip); 357 } 358 359 static void 360 rts_input_skip(struct mbuf *m, sa_family_t family, struct rawcb *skip) 361 { 362 struct netmsg_packet *pmsg; 363 lwkt_port_t port; 364 365 M_ASSERTPKTHDR(m); 366 367 port = cpu_portfn(0); /* XXX same as for routing socket */ 368 pmsg = &m->m_hdr.mh_netmsg; 369 netmsg_init(&pmsg->base, NULL, &netisr_apanic_rport, 370 0, rts_input_handler); 371 pmsg->nm_packet = m; 372 pmsg->base.lmsg.u.ms_result = family; 373 m->m_pkthdr.header = skip; /* XXX steal field in pkthdr */ 374 lwkt_sendmsg(port, &pmsg->base.lmsg); 375 } 376 377 static __inline void 378 rts_input(struct mbuf *m, sa_family_t family) 379 { 380 rts_input_skip(m, family, NULL); 381 } 382 383 static void * 384 reallocbuf_nofree(void *ptr, size_t len, size_t olen) 385 { 386 void *newptr; 387 388 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 389 if (newptr == NULL) 390 return NULL; 391 bcopy(ptr, newptr, olen); 392 return (newptr); 393 } 394 395 /* 396 * Internal helper routine for route_output(). 397 */ 398 static int 399 _fillrtmsg(struct rt_msghdr **prtm, struct rtentry *rt, 400 struct rt_addrinfo *rtinfo) 401 { 402 int msglen; 403 struct rt_msghdr *rtm = *prtm; 404 405 /* Fill in rt_addrinfo for call to rt_msg_buffer(). */ 406 rtinfo->rti_dst = rt_key(rt); 407 rtinfo->rti_gateway = rt->rt_gateway; 408 rtinfo->rti_netmask = rt_mask(rt); /* might be NULL */ 409 rtinfo->rti_genmask = rt->rt_genmask; /* might be NULL */ 410 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 411 if (rt->rt_ifp != NULL) { 412 rtinfo->rti_ifpaddr = 413 TAILQ_FIRST(&rt->rt_ifp->if_addrheads[mycpuid]) 414 ->ifa->ifa_addr; 415 rtinfo->rti_ifaaddr = rt->rt_ifa->ifa_addr; 416 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 417 rtinfo->rti_bcastaddr = rt->rt_ifa->ifa_dstaddr; 418 rtm->rtm_index = rt->rt_ifp->if_index; 419 } else { 420 rtinfo->rti_ifpaddr = NULL; 421 rtinfo->rti_ifaaddr = NULL; 422 } 423 } else if (rt->rt_ifp != NULL) { 424 rtm->rtm_index = rt->rt_ifp->if_index; 425 } 426 427 msglen = rt_msgsize(rtm->rtm_type, rtinfo); 428 if (rtm->rtm_msglen < msglen) { 429 /* NOTE: Caller will free the old rtm accordingly */ 430 rtm = reallocbuf_nofree(rtm, msglen, rtm->rtm_msglen); 431 if (rtm == NULL) 432 return (ENOBUFS); 433 *prtm = rtm; 434 } 435 rt_msg_buffer(rtm->rtm_type, rtinfo, rtm, msglen); 436 437 rtm->rtm_flags = rt->rt_flags; 438 rtm->rtm_rmx = rt->rt_rmx; 439 rtm->rtm_addrs = rtinfo->rti_addrs; 440 441 return (0); 442 } 443 444 struct rtm_arg { 445 struct rt_msghdr *bak_rtm; 446 struct rt_msghdr *new_rtm; 447 }; 448 449 static int 450 fillrtmsg(struct rtm_arg *arg, struct rtentry *rt, 451 struct rt_addrinfo *rtinfo) 452 { 453 struct rt_msghdr *rtm = arg->new_rtm; 454 int error; 455 456 error = _fillrtmsg(&rtm, rt, rtinfo); 457 if (!error) { 458 if (arg->new_rtm != rtm) { 459 /* 460 * _fillrtmsg() just allocated a new rtm; 461 * if the previously allocated rtm is not 462 * the backing rtm, it should be freed. 463 */ 464 if (arg->new_rtm != arg->bak_rtm) 465 kfree(arg->new_rtm, M_RTABLE); 466 arg->new_rtm = rtm; 467 } 468 } 469 return error; 470 } 471 472 static void route_output_add_callback(int, int, struct rt_addrinfo *, 473 struct rtentry *, void *); 474 static void route_output_delete_callback(int, int, struct rt_addrinfo *, 475 struct rtentry *, void *); 476 static int route_output_get_callback(int, struct rt_addrinfo *, 477 struct rtentry *, void *, int); 478 static int route_output_change_callback(int, struct rt_addrinfo *, 479 struct rtentry *, void *, int); 480 static int route_output_lock_callback(int, struct rt_addrinfo *, 481 struct rtentry *, void *, int); 482 483 /*ARGSUSED*/ 484 static int 485 route_output(struct mbuf *m, struct socket *so, ...) 486 { 487 struct rtm_arg arg; 488 struct rt_msghdr *rtm = NULL; 489 struct rawcb *rp = NULL; 490 struct pr_output_info *oi; 491 struct rt_addrinfo rtinfo; 492 sa_family_t family; 493 int len, error = 0; 494 __va_list ap; 495 496 M_ASSERTPKTHDR(m); 497 498 __va_start(ap, so); 499 oi = __va_arg(ap, struct pr_output_info *); 500 __va_end(ap); 501 502 family = familyof(NULL); 503 504 #define gotoerr(e) { error = e; goto flush;} 505 506 if (m == NULL || 507 (m->m_len < sizeof(long) && 508 (m = m_pullup(m, sizeof(long))) == NULL)) 509 return (ENOBUFS); 510 len = m->m_pkthdr.len; 511 if (len < sizeof(struct rt_msghdr) || 512 len != mtod(m, struct rt_msghdr *)->rtm_msglen) 513 gotoerr(EINVAL); 514 515 rtm = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 516 if (rtm == NULL) 517 gotoerr(ENOBUFS); 518 519 m_copydata(m, 0, len, (caddr_t)rtm); 520 if (rtm->rtm_version != RTM_VERSION) 521 gotoerr(EPROTONOSUPPORT); 522 523 rtm->rtm_pid = oi->p_pid; 524 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 525 rtinfo.rti_addrs = rtm->rtm_addrs; 526 if (rt_xaddrs((char *)(rtm + 1), (char *)rtm + len, &rtinfo) != 0) 527 gotoerr(EINVAL); 528 529 rtinfo.rti_flags = rtm->rtm_flags; 530 if (rtinfo.rti_dst == NULL || rtinfo.rti_dst->sa_family >= AF_MAX || 531 (rtinfo.rti_gateway && rtinfo.rti_gateway->sa_family >= AF_MAX)) 532 gotoerr(EINVAL); 533 534 family = familyof(rtinfo.rti_dst); 535 536 if (rtinfo.rti_genmask != NULL) { 537 error = rtmask_add_global(rtinfo.rti_genmask); 538 if (error) 539 goto flush; 540 } 541 542 /* 543 * Verify that the caller has the appropriate privilege; RTM_GET 544 * is the only operation the non-superuser is allowed. 545 */ 546 if (rtm->rtm_type != RTM_GET && 547 priv_check_cred(so->so_cred, PRIV_ROOT, 0) != 0) 548 gotoerr(EPERM); 549 550 switch (rtm->rtm_type) { 551 case RTM_ADD: 552 if (rtinfo.rti_gateway == NULL) { 553 error = EINVAL; 554 } else { 555 error = rtrequest1_global(RTM_ADD, &rtinfo, 556 route_output_add_callback, rtm); 557 } 558 break; 559 case RTM_DELETE: 560 /* 561 * Backing rtm (bak_rtm) could _not_ be freed during 562 * rtrequest1_global or rtsearch_global, even if the 563 * callback reallocates the rtm due to its size changes, 564 * since rtinfo points to the backing rtm's memory area. 565 * After rtrequest1_global or rtsearch_global returns, 566 * it is safe to free the backing rtm, since rtinfo will 567 * not be used anymore. 568 * 569 * new_rtm will be used to save the new rtm allocated 570 * by rtrequest1_global or rtsearch_global. 571 */ 572 arg.bak_rtm = rtm; 573 arg.new_rtm = rtm; 574 error = rtrequest1_global(RTM_DELETE, &rtinfo, 575 route_output_delete_callback, &arg); 576 rtm = arg.new_rtm; 577 if (rtm != arg.bak_rtm) 578 kfree(arg.bak_rtm, M_RTABLE); 579 break; 580 case RTM_GET: 581 /* See the comment in RTM_DELETE */ 582 arg.bak_rtm = rtm; 583 arg.new_rtm = rtm; 584 error = rtsearch_global(RTM_GET, &rtinfo, 585 route_output_get_callback, &arg, 586 RTS_NOEXACTMATCH); 587 rtm = arg.new_rtm; 588 if (rtm != arg.bak_rtm) 589 kfree(arg.bak_rtm, M_RTABLE); 590 break; 591 case RTM_CHANGE: 592 error = rtsearch_global(RTM_CHANGE, &rtinfo, 593 route_output_change_callback, rtm, 594 RTS_EXACTMATCH); 595 break; 596 case RTM_LOCK: 597 error = rtsearch_global(RTM_LOCK, &rtinfo, 598 route_output_lock_callback, rtm, 599 RTS_EXACTMATCH); 600 break; 601 default: 602 error = EOPNOTSUPP; 603 break; 604 } 605 flush: 606 if (rtm != NULL) { 607 if (error != 0) 608 rtm->rtm_errno = error; 609 else 610 rtm->rtm_flags |= RTF_DONE; 611 } 612 613 /* 614 * Check to see if we don't want our own messages. 615 */ 616 if (!(so->so_options & SO_USELOOPBACK)) { 617 if (route_cb.any_count <= 1) { 618 if (rtm != NULL) 619 kfree(rtm, M_RTABLE); 620 m_freem(m); 621 return (error); 622 } 623 /* There is another listener, so construct message */ 624 rp = sotorawcb(so); 625 } 626 if (rtm != NULL) { 627 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 628 if (m->m_pkthdr.len < rtm->rtm_msglen) { 629 m_freem(m); 630 m = NULL; 631 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 632 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 633 kfree(rtm, M_RTABLE); 634 } 635 if (m != NULL) 636 rts_input_skip(m, family, rp); 637 return (error); 638 } 639 640 static void 641 route_output_add_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 642 struct rtentry *rt, void *arg) 643 { 644 struct rt_msghdr *rtm = arg; 645 646 if (error == 0 && rt != NULL) { 647 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 648 &rt->rt_rmx); 649 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 650 rt->rt_rmx.rmx_locks |= 651 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 652 if (rtinfo->rti_genmask != NULL) { 653 rt->rt_genmask = rtmask_purelookup(rtinfo->rti_genmask); 654 if (rt->rt_genmask == NULL) { 655 /* 656 * This should not happen, since we 657 * have already installed genmask 658 * on each CPU before we reach here. 659 */ 660 panic("genmask is gone!?"); 661 } 662 } else { 663 rt->rt_genmask = NULL; 664 } 665 rtm->rtm_index = rt->rt_ifp->if_index; 666 } 667 } 668 669 static void 670 route_output_delete_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 671 struct rtentry *rt, void *arg) 672 { 673 if (error == 0 && rt) { 674 ++rt->rt_refcnt; 675 if (fillrtmsg(arg, rt, rtinfo) != 0) { 676 error = ENOBUFS; 677 /* XXX no way to return the error */ 678 } 679 --rt->rt_refcnt; 680 } 681 if (rt && rt->rt_refcnt == 0) { 682 ++rt->rt_refcnt; 683 rtfree(rt); 684 } 685 } 686 687 static int 688 route_output_get_callback(int cmd, struct rt_addrinfo *rtinfo, 689 struct rtentry *rt, void *arg, int found_cnt) 690 { 691 int error, found = 0; 692 693 if (((rtinfo->rti_flags ^ rt->rt_flags) & RTF_HOST) == 0) 694 found = 1; 695 696 error = fillrtmsg(arg, rt, rtinfo); 697 if (!error && found) { 698 /* Got the exact match, we could return now! */ 699 error = EJUSTRETURN; 700 } 701 return error; 702 } 703 704 static int 705 route_output_change_callback(int cmd, struct rt_addrinfo *rtinfo, 706 struct rtentry *rt, void *arg, int found_cnt) 707 { 708 struct rt_msghdr *rtm = arg; 709 struct ifaddr *ifa; 710 int error = 0; 711 712 /* 713 * new gateway could require new ifaddr, ifp; 714 * flags may also be different; ifp may be specified 715 * by ll sockaddr when protocol address is ambiguous 716 */ 717 if (((rt->rt_flags & RTF_GATEWAY) && rtinfo->rti_gateway != NULL) || 718 rtinfo->rti_ifpaddr != NULL || 719 (rtinfo->rti_ifaaddr != NULL && 720 !sa_equal(rtinfo->rti_ifaaddr, rt->rt_ifa->ifa_addr))) { 721 error = rt_getifa(rtinfo); 722 if (error != 0) 723 goto done; 724 } 725 if (rtinfo->rti_gateway != NULL) { 726 /* 727 * We only need to generate rtmsg upon the 728 * first route to be changed. 729 */ 730 error = rt_setgate(rt, rt_key(rt), rtinfo->rti_gateway, 731 found_cnt == 1 ? RTL_REPORTMSG : RTL_DONTREPORT); 732 if (error != 0) 733 goto done; 734 } 735 if ((ifa = rtinfo->rti_ifa) != NULL) { 736 struct ifaddr *oifa = rt->rt_ifa; 737 738 if (oifa != ifa) { 739 if (oifa && oifa->ifa_rtrequest) 740 oifa->ifa_rtrequest(RTM_DELETE, rt, rtinfo); 741 IFAFREE(rt->rt_ifa); 742 IFAREF(ifa); 743 rt->rt_ifa = ifa; 744 rt->rt_ifp = rtinfo->rti_ifp; 745 } 746 } 747 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, &rt->rt_rmx); 748 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 749 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, rtinfo); 750 if (rtinfo->rti_genmask != NULL) { 751 rt->rt_genmask = rtmask_purelookup(rtinfo->rti_genmask); 752 if (rt->rt_genmask == NULL) { 753 /* 754 * This should not happen, since we 755 * have already installed genmask 756 * on each CPU before we reach here. 757 */ 758 panic("genmask is gone!?\n"); 759 } 760 } 761 rtm->rtm_index = rt->rt_ifp->if_index; 762 done: 763 return error; 764 } 765 766 static int 767 route_output_lock_callback(int cmd, struct rt_addrinfo *rtinfo, 768 struct rtentry *rt, void *arg, 769 int found_cnt __unused) 770 { 771 struct rt_msghdr *rtm = arg; 772 773 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 774 rt->rt_rmx.rmx_locks |= 775 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 776 return 0; 777 } 778 779 static void 780 rt_setmetrics(u_long which, struct rt_metrics *in, struct rt_metrics *out) 781 { 782 #define setmetric(flag, elt) if (which & (flag)) out->elt = in->elt; 783 setmetric(RTV_RPIPE, rmx_recvpipe); 784 setmetric(RTV_SPIPE, rmx_sendpipe); 785 setmetric(RTV_SSTHRESH, rmx_ssthresh); 786 setmetric(RTV_RTT, rmx_rtt); 787 setmetric(RTV_RTTVAR, rmx_rttvar); 788 setmetric(RTV_HOPCOUNT, rmx_hopcount); 789 setmetric(RTV_MTU, rmx_mtu); 790 setmetric(RTV_EXPIRE, rmx_expire); 791 setmetric(RTV_MSL, rmx_msl); 792 #undef setmetric 793 } 794 795 #define ROUNDUP(a) \ 796 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 797 798 /* 799 * Extract the addresses of the passed sockaddrs. 800 * Do a little sanity checking so as to avoid bad memory references. 801 * This data is derived straight from userland. 802 */ 803 static int 804 rt_xaddrs(char *cp, char *cplim, struct rt_addrinfo *rtinfo) 805 { 806 struct sockaddr *sa; 807 int i; 808 809 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 810 if ((rtinfo->rti_addrs & (1 << i)) == 0) 811 continue; 812 sa = (struct sockaddr *)cp; 813 /* 814 * It won't fit. 815 */ 816 if ((cp + sa->sa_len) > cplim) { 817 return (EINVAL); 818 } 819 820 /* 821 * There are no more... Quit now. 822 * If there are more bits, they are in error. 823 * I've seen this. route(1) can evidently generate these. 824 * This causes kernel to core dump. 825 * For compatibility, if we see this, point to a safe address. 826 */ 827 if (sa->sa_len == 0) { 828 static struct sockaddr sa_zero = { 829 sizeof sa_zero, AF_INET, 830 }; 831 832 rtinfo->rti_info[i] = &sa_zero; 833 kprintf("rtsock: received more addr bits than sockaddrs.\n"); 834 return (0); /* should be EINVAL but for compat */ 835 } 836 837 /* Accept the sockaddr. */ 838 rtinfo->rti_info[i] = sa; 839 cp += ROUNDUP(sa->sa_len); 840 } 841 return (0); 842 } 843 844 static int 845 rt_msghdrsize(int type) 846 { 847 switch (type) { 848 case RTM_DELADDR: 849 case RTM_NEWADDR: 850 return sizeof(struct ifa_msghdr); 851 case RTM_DELMADDR: 852 case RTM_NEWMADDR: 853 return sizeof(struct ifma_msghdr); 854 case RTM_IFINFO: 855 return sizeof(struct if_msghdr); 856 case RTM_IFANNOUNCE: 857 case RTM_IEEE80211: 858 return sizeof(struct if_announcemsghdr); 859 default: 860 return sizeof(struct rt_msghdr); 861 } 862 } 863 864 static int 865 rt_msgsize(int type, struct rt_addrinfo *rtinfo) 866 { 867 int len, i; 868 869 len = rt_msghdrsize(type); 870 for (i = 0; i < RTAX_MAX; i++) { 871 if (rtinfo->rti_info[i] != NULL) 872 len += ROUNDUP(rtinfo->rti_info[i]->sa_len); 873 } 874 len = ALIGN(len); 875 return len; 876 } 877 878 /* 879 * Build a routing message in a buffer. 880 * Copy the addresses in the rtinfo->rti_info[] sockaddr array 881 * to the end of the buffer after the message header. 882 * 883 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[]. 884 * This side-effect can be avoided if we reorder the addrs bitmask field in all 885 * the route messages to line up so we can set it here instead of back in the 886 * calling routine. 887 */ 888 static void 889 rt_msg_buffer(int type, struct rt_addrinfo *rtinfo, void *buf, int msglen) 890 { 891 struct rt_msghdr *rtm; 892 char *cp; 893 int dlen, i; 894 895 rtm = (struct rt_msghdr *) buf; 896 rtm->rtm_version = RTM_VERSION; 897 rtm->rtm_type = type; 898 rtm->rtm_msglen = msglen; 899 900 cp = (char *)buf + rt_msghdrsize(type); 901 rtinfo->rti_addrs = 0; 902 for (i = 0; i < RTAX_MAX; i++) { 903 struct sockaddr *sa; 904 905 if ((sa = rtinfo->rti_info[i]) == NULL) 906 continue; 907 rtinfo->rti_addrs |= (1 << i); 908 dlen = ROUNDUP(sa->sa_len); 909 bcopy(sa, cp, dlen); 910 cp += dlen; 911 } 912 } 913 914 /* 915 * Build a routing message in a mbuf chain. 916 * Copy the addresses in the rtinfo->rti_info[] sockaddr array 917 * to the end of the mbuf after the message header. 918 * 919 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[]. 920 * This side-effect can be avoided if we reorder the addrs bitmask field in all 921 * the route messages to line up so we can set it here instead of back in the 922 * calling routine. 923 */ 924 static struct mbuf * 925 rt_msg_mbuf(int type, struct rt_addrinfo *rtinfo) 926 { 927 struct mbuf *m; 928 struct rt_msghdr *rtm; 929 int hlen, len; 930 int i; 931 932 hlen = rt_msghdrsize(type); 933 KASSERT(hlen <= MCLBYTES, ("rt_msg_mbuf: hlen %d doesn't fit", hlen)); 934 935 m = m_getl(hlen, MB_DONTWAIT, MT_DATA, M_PKTHDR, NULL); 936 if (m == NULL) 937 return (NULL); 938 mbuftrackid(m, 32); 939 m->m_pkthdr.len = m->m_len = hlen; 940 m->m_pkthdr.rcvif = NULL; 941 rtinfo->rti_addrs = 0; 942 len = hlen; 943 for (i = 0; i < RTAX_MAX; i++) { 944 struct sockaddr *sa; 945 int dlen; 946 947 if ((sa = rtinfo->rti_info[i]) == NULL) 948 continue; 949 rtinfo->rti_addrs |= (1 << i); 950 dlen = ROUNDUP(sa->sa_len); 951 m_copyback(m, len, dlen, (caddr_t)sa); /* can grow mbuf chain */ 952 len += dlen; 953 } 954 if (m->m_pkthdr.len != len) { /* one of the m_copyback() calls failed */ 955 m_freem(m); 956 return (NULL); 957 } 958 rtm = mtod(m, struct rt_msghdr *); 959 bzero(rtm, hlen); 960 rtm->rtm_msglen = len; 961 rtm->rtm_version = RTM_VERSION; 962 rtm->rtm_type = type; 963 return (m); 964 } 965 966 /* 967 * This routine is called to generate a message from the routing 968 * socket indicating that a redirect has occurred, a routing lookup 969 * has failed, or that a protocol has detected timeouts to a particular 970 * destination. 971 */ 972 void 973 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error) 974 { 975 struct sockaddr *dst = rtinfo->rti_info[RTAX_DST]; 976 struct rt_msghdr *rtm; 977 struct mbuf *m; 978 979 if (route_cb.any_count == 0) 980 return; 981 m = rt_msg_mbuf(type, rtinfo); 982 if (m == NULL) 983 return; 984 rtm = mtod(m, struct rt_msghdr *); 985 rtm->rtm_flags = RTF_DONE | flags; 986 rtm->rtm_errno = error; 987 rtm->rtm_addrs = rtinfo->rti_addrs; 988 rts_input(m, familyof(dst)); 989 } 990 991 void 992 rt_dstmsg(int type, struct sockaddr *dst, int error) 993 { 994 struct rt_msghdr *rtm; 995 struct rt_addrinfo addrs; 996 struct mbuf *m; 997 998 if (route_cb.any_count == 0) 999 return; 1000 bzero(&addrs, sizeof(struct rt_addrinfo)); 1001 addrs.rti_info[RTAX_DST] = dst; 1002 m = rt_msg_mbuf(type, &addrs); 1003 if (m == NULL) 1004 return; 1005 rtm = mtod(m, struct rt_msghdr *); 1006 rtm->rtm_flags = RTF_DONE; 1007 rtm->rtm_errno = error; 1008 rtm->rtm_addrs = addrs.rti_addrs; 1009 rts_input(m, familyof(dst)); 1010 } 1011 1012 /* 1013 * This routine is called to generate a message from the routing 1014 * socket indicating that the status of a network interface has changed. 1015 */ 1016 void 1017 rt_ifmsg(struct ifnet *ifp) 1018 { 1019 struct if_msghdr *ifm; 1020 struct mbuf *m; 1021 struct rt_addrinfo rtinfo; 1022 1023 if (route_cb.any_count == 0) 1024 return; 1025 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1026 m = rt_msg_mbuf(RTM_IFINFO, &rtinfo); 1027 if (m == NULL) 1028 return; 1029 ifm = mtod(m, struct if_msghdr *); 1030 ifm->ifm_index = ifp->if_index; 1031 ifm->ifm_flags = ifp->if_flags; 1032 ifm->ifm_data = ifp->if_data; 1033 ifm->ifm_addrs = 0; 1034 rts_input(m, 0); 1035 } 1036 1037 static void 1038 rt_ifamsg(int cmd, struct ifaddr *ifa) 1039 { 1040 struct ifa_msghdr *ifam; 1041 struct rt_addrinfo rtinfo; 1042 struct mbuf *m; 1043 struct ifnet *ifp = ifa->ifa_ifp; 1044 1045 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1046 rtinfo.rti_ifaaddr = ifa->ifa_addr; 1047 rtinfo.rti_ifpaddr = 1048 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr; 1049 rtinfo.rti_netmask = ifa->ifa_netmask; 1050 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr; 1051 1052 m = rt_msg_mbuf(cmd, &rtinfo); 1053 if (m == NULL) 1054 return; 1055 1056 ifam = mtod(m, struct ifa_msghdr *); 1057 ifam->ifam_index = ifp->if_index; 1058 ifam->ifam_metric = ifa->ifa_metric; 1059 ifam->ifam_flags = ifa->ifa_flags; 1060 ifam->ifam_addrs = rtinfo.rti_addrs; 1061 1062 rts_input(m, familyof(ifa->ifa_addr)); 1063 } 1064 1065 void 1066 rt_rtmsg(int cmd, struct rtentry *rt, struct ifnet *ifp, int error) 1067 { 1068 struct rt_msghdr *rtm; 1069 struct rt_addrinfo rtinfo; 1070 struct mbuf *m; 1071 struct sockaddr *dst; 1072 1073 if (rt == NULL) 1074 return; 1075 1076 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1077 rtinfo.rti_dst = dst = rt_key(rt); 1078 rtinfo.rti_gateway = rt->rt_gateway; 1079 rtinfo.rti_netmask = rt_mask(rt); 1080 if (ifp != NULL) { 1081 rtinfo.rti_ifpaddr = 1082 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr; 1083 } 1084 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr; 1085 1086 m = rt_msg_mbuf(cmd, &rtinfo); 1087 if (m == NULL) 1088 return; 1089 1090 rtm = mtod(m, struct rt_msghdr *); 1091 if (ifp != NULL) 1092 rtm->rtm_index = ifp->if_index; 1093 rtm->rtm_flags |= rt->rt_flags; 1094 rtm->rtm_errno = error; 1095 rtm->rtm_addrs = rtinfo.rti_addrs; 1096 1097 rts_input(m, familyof(dst)); 1098 } 1099 1100 /* 1101 * This is called to generate messages from the routing socket 1102 * indicating a network interface has had addresses associated with it. 1103 * if we ever reverse the logic and replace messages TO the routing 1104 * socket indicate a request to configure interfaces, then it will 1105 * be unnecessary as the routing socket will automatically generate 1106 * copies of it. 1107 */ 1108 void 1109 rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt) 1110 { 1111 #ifdef SCTP 1112 /* 1113 * notify the SCTP stack 1114 * this will only get called when an address is added/deleted 1115 * XXX pass the ifaddr struct instead if ifa->ifa_addr... 1116 */ 1117 if (cmd == RTM_ADD) 1118 sctp_add_ip_address(ifa); 1119 else if (cmd == RTM_DELETE) 1120 sctp_delete_ip_address(ifa); 1121 #endif /* SCTP */ 1122 1123 if (route_cb.any_count == 0) 1124 return; 1125 1126 if (cmd == RTM_ADD) { 1127 rt_ifamsg(RTM_NEWADDR, ifa); 1128 rt_rtmsg(RTM_ADD, rt, ifa->ifa_ifp, error); 1129 } else { 1130 KASSERT((cmd == RTM_DELETE), ("unknown cmd %d", cmd)); 1131 rt_rtmsg(RTM_DELETE, rt, ifa->ifa_ifp, error); 1132 rt_ifamsg(RTM_DELADDR, ifa); 1133 } 1134 } 1135 1136 /* 1137 * This is the analogue to the rt_newaddrmsg which performs the same 1138 * function but for multicast group memberhips. This is easier since 1139 * there is no route state to worry about. 1140 */ 1141 void 1142 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma) 1143 { 1144 struct rt_addrinfo rtinfo; 1145 struct mbuf *m = NULL; 1146 struct ifnet *ifp = ifma->ifma_ifp; 1147 struct ifma_msghdr *ifmam; 1148 1149 if (route_cb.any_count == 0) 1150 return; 1151 1152 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1153 rtinfo.rti_ifaaddr = ifma->ifma_addr; 1154 if (ifp != NULL && !TAILQ_EMPTY(&ifp->if_addrheads[mycpuid])) { 1155 rtinfo.rti_ifpaddr = 1156 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr; 1157 } 1158 /* 1159 * If a link-layer address is present, present it as a ``gateway'' 1160 * (similarly to how ARP entries, e.g., are presented). 1161 */ 1162 rtinfo.rti_gateway = ifma->ifma_lladdr; 1163 1164 m = rt_msg_mbuf(cmd, &rtinfo); 1165 if (m == NULL) 1166 return; 1167 1168 ifmam = mtod(m, struct ifma_msghdr *); 1169 ifmam->ifmam_index = ifp->if_index; 1170 ifmam->ifmam_addrs = rtinfo.rti_addrs; 1171 1172 rts_input(m, familyof(ifma->ifma_addr)); 1173 } 1174 1175 static struct mbuf * 1176 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1177 struct rt_addrinfo *info) 1178 { 1179 struct if_announcemsghdr *ifan; 1180 struct mbuf *m; 1181 1182 if (route_cb.any_count == 0) 1183 return NULL; 1184 1185 bzero(info, sizeof(*info)); 1186 m = rt_msg_mbuf(type, info); 1187 if (m == NULL) 1188 return NULL; 1189 1190 ifan = mtod(m, struct if_announcemsghdr *); 1191 ifan->ifan_index = ifp->if_index; 1192 strlcpy(ifan->ifan_name, ifp->if_xname, sizeof ifan->ifan_name); 1193 ifan->ifan_what = what; 1194 return m; 1195 } 1196 1197 /* 1198 * This is called to generate routing socket messages indicating 1199 * IEEE80211 wireless events. 1200 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1201 */ 1202 void 1203 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len) 1204 { 1205 struct rt_addrinfo info; 1206 struct mbuf *m; 1207 1208 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1209 if (m == NULL) 1210 return; 1211 1212 /* 1213 * Append the ieee80211 data. Try to stick it in the 1214 * mbuf containing the ifannounce msg; otherwise allocate 1215 * a new mbuf and append. 1216 * 1217 * NB: we assume m is a single mbuf. 1218 */ 1219 if (data_len > M_TRAILINGSPACE(m)) { 1220 /* XXX use m_getb(data_len, MB_DONTWAIT, MT_DATA, 0); */ 1221 struct mbuf *n = m_get(MB_DONTWAIT, MT_DATA); 1222 if (n == NULL) { 1223 m_freem(m); 1224 return; 1225 } 1226 KKASSERT(data_len <= M_TRAILINGSPACE(n)); 1227 bcopy(data, mtod(n, void *), data_len); 1228 n->m_len = data_len; 1229 m->m_next = n; 1230 } else if (data_len > 0) { 1231 bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len); 1232 m->m_len += data_len; 1233 } 1234 mbuftrackid(m, 33); 1235 if (m->m_flags & M_PKTHDR) 1236 m->m_pkthdr.len += data_len; 1237 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len; 1238 rts_input(m, 0); 1239 } 1240 1241 /* 1242 * This is called to generate routing socket messages indicating 1243 * network interface arrival and departure. 1244 */ 1245 void 1246 rt_ifannouncemsg(struct ifnet *ifp, int what) 1247 { 1248 struct rt_addrinfo addrinfo; 1249 struct mbuf *m; 1250 1251 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &addrinfo); 1252 if (m != NULL) 1253 rts_input(m, 0); 1254 } 1255 1256 static int 1257 resizewalkarg(struct walkarg *w, int len) 1258 { 1259 void *newptr; 1260 1261 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 1262 if (newptr == NULL) 1263 return (ENOMEM); 1264 if (w->w_tmem != NULL) 1265 kfree(w->w_tmem, M_RTABLE); 1266 w->w_tmem = newptr; 1267 w->w_tmemsize = len; 1268 return (0); 1269 } 1270 1271 /* 1272 * This is used in dumping the kernel table via sysctl(). 1273 */ 1274 int 1275 sysctl_dumpentry(struct radix_node *rn, void *vw) 1276 { 1277 struct walkarg *w = vw; 1278 struct rtentry *rt = (struct rtentry *)rn; 1279 struct rt_addrinfo rtinfo; 1280 int error, msglen; 1281 1282 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1283 return 0; 1284 1285 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1286 rtinfo.rti_dst = rt_key(rt); 1287 rtinfo.rti_gateway = rt->rt_gateway; 1288 rtinfo.rti_netmask = rt_mask(rt); 1289 rtinfo.rti_genmask = rt->rt_genmask; 1290 if (rt->rt_ifp != NULL) { 1291 rtinfo.rti_ifpaddr = 1292 TAILQ_FIRST(&rt->rt_ifp->if_addrheads[mycpuid])->ifa->ifa_addr; 1293 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr; 1294 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1295 rtinfo.rti_bcastaddr = rt->rt_ifa->ifa_dstaddr; 1296 } 1297 msglen = rt_msgsize(RTM_GET, &rtinfo); 1298 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0) 1299 return (ENOMEM); 1300 rt_msg_buffer(RTM_GET, &rtinfo, w->w_tmem, msglen); 1301 if (w->w_req != NULL) { 1302 struct rt_msghdr *rtm = w->w_tmem; 1303 1304 rtm->rtm_flags = rt->rt_flags; 1305 rtm->rtm_use = rt->rt_use; 1306 rtm->rtm_rmx = rt->rt_rmx; 1307 rtm->rtm_index = rt->rt_ifp->if_index; 1308 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1309 rtm->rtm_addrs = rtinfo.rti_addrs; 1310 error = SYSCTL_OUT(w->w_req, rtm, msglen); 1311 return (error); 1312 } 1313 return (0); 1314 } 1315 1316 static int 1317 sysctl_iflist(int af, struct walkarg *w) 1318 { 1319 struct ifnet *ifp; 1320 struct rt_addrinfo rtinfo; 1321 int msglen, error; 1322 1323 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1324 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1325 struct ifaddr_container *ifac; 1326 struct ifaddr *ifa; 1327 1328 if (w->w_arg && w->w_arg != ifp->if_index) 1329 continue; 1330 ifac = TAILQ_FIRST(&ifp->if_addrheads[mycpuid]); 1331 ifa = ifac->ifa; 1332 rtinfo.rti_ifpaddr = ifa->ifa_addr; 1333 msglen = rt_msgsize(RTM_IFINFO, &rtinfo); 1334 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0) 1335 return (ENOMEM); 1336 rt_msg_buffer(RTM_IFINFO, &rtinfo, w->w_tmem, msglen); 1337 rtinfo.rti_ifpaddr = NULL; 1338 if (w->w_req != NULL && w->w_tmem != NULL) { 1339 struct if_msghdr *ifm = w->w_tmem; 1340 1341 ifm->ifm_index = ifp->if_index; 1342 ifm->ifm_flags = ifp->if_flags; 1343 ifm->ifm_data = ifp->if_data; 1344 ifm->ifm_addrs = rtinfo.rti_addrs; 1345 error = SYSCTL_OUT(w->w_req, ifm, msglen); 1346 if (error) 1347 return (error); 1348 } 1349 while ((ifac = TAILQ_NEXT(ifac, ifa_link)) != NULL) { 1350 ifa = ifac->ifa; 1351 1352 if (af && af != ifa->ifa_addr->sa_family) 1353 continue; 1354 if (curproc->p_ucred->cr_prison && 1355 prison_if(curproc->p_ucred, ifa->ifa_addr)) 1356 continue; 1357 rtinfo.rti_ifaaddr = ifa->ifa_addr; 1358 rtinfo.rti_netmask = ifa->ifa_netmask; 1359 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr; 1360 msglen = rt_msgsize(RTM_NEWADDR, &rtinfo); 1361 if (w->w_tmemsize < msglen && 1362 resizewalkarg(w, msglen) != 0) 1363 return (ENOMEM); 1364 rt_msg_buffer(RTM_NEWADDR, &rtinfo, w->w_tmem, msglen); 1365 if (w->w_req != NULL) { 1366 struct ifa_msghdr *ifam = w->w_tmem; 1367 1368 ifam->ifam_index = ifa->ifa_ifp->if_index; 1369 ifam->ifam_flags = ifa->ifa_flags; 1370 ifam->ifam_metric = ifa->ifa_metric; 1371 ifam->ifam_addrs = rtinfo.rti_addrs; 1372 error = SYSCTL_OUT(w->w_req, w->w_tmem, msglen); 1373 if (error) 1374 return (error); 1375 } 1376 } 1377 rtinfo.rti_netmask = NULL; 1378 rtinfo.rti_ifaaddr = NULL; 1379 rtinfo.rti_bcastaddr = NULL; 1380 } 1381 return (0); 1382 } 1383 1384 static int 1385 sysctl_rtsock(SYSCTL_HANDLER_ARGS) 1386 { 1387 int *name = (int *)arg1; 1388 u_int namelen = arg2; 1389 struct radix_node_head *rnh; 1390 int i, error = EINVAL; 1391 int origcpu; 1392 u_char af; 1393 struct walkarg w; 1394 1395 name ++; 1396 namelen--; 1397 if (req->newptr) 1398 return (EPERM); 1399 if (namelen != 3 && namelen != 4) 1400 return (EINVAL); 1401 af = name[0]; 1402 bzero(&w, sizeof w); 1403 w.w_op = name[1]; 1404 w.w_arg = name[2]; 1405 w.w_req = req; 1406 1407 /* 1408 * Optional third argument specifies cpu, used primarily for 1409 * debugging the route table. 1410 */ 1411 if (namelen == 4) { 1412 if (name[3] < 0 || name[3] >= ncpus) 1413 return (EINVAL); 1414 origcpu = mycpuid; 1415 lwkt_migratecpu(name[3]); 1416 } else { 1417 origcpu = -1; 1418 } 1419 crit_enter(); 1420 switch (w.w_op) { 1421 case NET_RT_DUMP: 1422 case NET_RT_FLAGS: 1423 for (i = 1; i <= AF_MAX; i++) 1424 if ((rnh = rt_tables[mycpuid][i]) && 1425 (af == 0 || af == i) && 1426 (error = rnh->rnh_walktree(rnh, 1427 sysctl_dumpentry, &w))) 1428 break; 1429 break; 1430 1431 case NET_RT_IFLIST: 1432 error = sysctl_iflist(af, &w); 1433 } 1434 crit_exit(); 1435 if (w.w_tmem != NULL) 1436 kfree(w.w_tmem, M_RTABLE); 1437 if (origcpu >= 0) 1438 lwkt_migratecpu(origcpu); 1439 return (error); 1440 } 1441 1442 SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, ""); 1443 1444 /* 1445 * Definitions of protocols supported in the ROUTE domain. 1446 */ 1447 1448 static struct domain routedomain; /* or at least forward */ 1449 1450 static struct protosw routesw[] = { 1451 { 1452 .pr_type = SOCK_RAW, 1453 .pr_domain = &routedomain, 1454 .pr_protocol = 0, 1455 .pr_flags = PR_ATOMIC|PR_ADDR, 1456 .pr_input = NULL, 1457 .pr_output = route_output, 1458 .pr_ctlinput = raw_ctlinput, 1459 .pr_ctloutput = NULL, 1460 .pr_ctlport = cpu0_ctlport, 1461 1462 .pr_init = raw_init, 1463 .pr_usrreqs = &route_usrreqs 1464 } 1465 }; 1466 1467 static struct domain routedomain = { 1468 PF_ROUTE, "route", NULL, NULL, NULL, 1469 routesw, &routesw[(sizeof routesw)/(sizeof routesw[0])], 1470 }; 1471 1472 DOMAIN_SET(route); 1473 1474