Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/net/rtsock.c
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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. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 * 61 * @(#)rtsock.c 8.7 (Berkeley) 10/12/95 62 * $FreeBSD: src/sys/net/rtsock.c,v 1.44.2.11 2002/12/04 14:05:41 ru Exp $ 63 */ 64 65 #include "opt_sctp.h" 66 67 #include <sys/param.h> 68 #include <sys/systm.h> 69 #include <sys/kernel.h> 70 #include <sys/sysctl.h> 71 #include <sys/proc.h> 72 #include <sys/priv.h> 73 #include <sys/malloc.h> 74 #include <sys/mbuf.h> 75 #include <sys/protosw.h> 76 #include <sys/socket.h> 77 #include <sys/socketvar.h> 78 #include <sys/domain.h> 79 80 #include <sys/thread2.h> 81 #include <sys/socketvar2.h> 82 83 #include <net/if.h> 84 #include <net/route.h> 85 #include <net/raw_cb.h> 86 #include <net/netmsg2.h> 87 #include <net/netisr2.h> 88 89 #ifdef SCTP 90 extern void sctp_add_ip_address(struct ifaddr *ifa); 91 extern void sctp_delete_ip_address(struct ifaddr *ifa); 92 #endif /* SCTP */ 93 94 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables"); 95 96 static struct route_cb { 97 int ip_count; 98 int ip6_count; 99 int ipx_count; 100 int ns_count; 101 int any_count; 102 } route_cb; 103 104 static const struct sockaddr route_src = { 2, PF_ROUTE, }; 105 106 struct walkarg { 107 int w_tmemsize; 108 int w_op, w_arg; 109 void *w_tmem; 110 struct sysctl_req *w_req; 111 }; 112 113 static struct mbuf * 114 rt_msg_mbuf (int, struct rt_addrinfo *); 115 static void rt_msg_buffer (int, struct rt_addrinfo *, void *buf, int len); 116 static int rt_msgsize (int type, struct rt_addrinfo *rtinfo); 117 static int rt_xaddrs (char *, char *, struct rt_addrinfo *); 118 static int sysctl_dumpentry (struct radix_node *rn, void *vw); 119 static int sysctl_iflist (int af, struct walkarg *w); 120 static int route_output(struct mbuf *, struct socket *, ...); 121 static void rt_setmetrics (u_long, struct rt_metrics *, 122 struct rt_metrics *); 123 124 /* 125 * It really doesn't make any sense at all for this code to share much 126 * with raw_usrreq.c, since its functionality is so restricted. XXX 127 */ 128 static void 129 rts_abort(netmsg_t msg) 130 { 131 crit_enter(); 132 raw_usrreqs.pru_abort(msg); 133 /* msg invalid now */ 134 crit_exit(); 135 } 136 137 /* pru_accept is EOPNOTSUPP */ 138 139 static void 140 rts_attach(netmsg_t msg) 141 { 142 struct socket *so = msg->base.nm_so; 143 struct pru_attach_info *ai = msg->attach.nm_ai; 144 struct rawcb *rp; 145 int proto = msg->attach.nm_proto; 146 int error; 147 148 crit_enter(); 149 if (sotorawcb(so) != NULL) { 150 error = EISCONN; 151 goto done; 152 } 153 154 rp = kmalloc(sizeof *rp, M_PCB, M_WAITOK | M_ZERO); 155 156 /* 157 * The critical section is necessary to block protocols from sending 158 * error notifications (like RTM_REDIRECT or RTM_LOSING) while 159 * this PCB is extant but incompletely initialized. 160 * Probably we should try to do more of this work beforehand and 161 * eliminate the critical section. 162 */ 163 so->so_pcb = rp; 164 soreference(so); /* so_pcb assignment */ 165 error = raw_attach(so, proto, ai->sb_rlimit); 166 rp = sotorawcb(so); 167 if (error) { 168 kfree(rp, M_PCB); 169 goto done; 170 } 171 switch(rp->rcb_proto.sp_protocol) { 172 case AF_INET: 173 route_cb.ip_count++; 174 break; 175 case AF_INET6: 176 route_cb.ip6_count++; 177 break; 178 case AF_IPX: 179 route_cb.ipx_count++; 180 break; 181 case AF_NS: 182 route_cb.ns_count++; 183 break; 184 } 185 rp->rcb_faddr = &route_src; 186 route_cb.any_count++; 187 soisconnected(so); 188 so->so_options |= SO_USELOOPBACK; 189 error = 0; 190 done: 191 crit_exit(); 192 lwkt_replymsg(&msg->lmsg, error); 193 } 194 195 static void 196 rts_bind(netmsg_t msg) 197 { 198 crit_enter(); 199 raw_usrreqs.pru_bind(msg); /* xxx just EINVAL */ 200 /* msg invalid now */ 201 crit_exit(); 202 } 203 204 static void 205 rts_connect(netmsg_t msg) 206 { 207 crit_enter(); 208 raw_usrreqs.pru_connect(msg); /* XXX just EINVAL */ 209 /* msg invalid now */ 210 crit_exit(); 211 } 212 213 /* pru_connect2 is EOPNOTSUPP */ 214 /* pru_control is EOPNOTSUPP */ 215 216 static void 217 rts_detach(netmsg_t msg) 218 { 219 struct socket *so = msg->base.nm_so; 220 struct rawcb *rp = sotorawcb(so); 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 raw_usrreqs.pru_detach(msg); 241 /* msg invalid now */ 242 crit_exit(); 243 } 244 245 static void 246 rts_disconnect(netmsg_t msg) 247 { 248 crit_enter(); 249 raw_usrreqs.pru_disconnect(msg); 250 /* msg invalid now */ 251 crit_exit(); 252 } 253 254 /* pru_listen is EOPNOTSUPP */ 255 256 static void 257 rts_peeraddr(netmsg_t msg) 258 { 259 crit_enter(); 260 raw_usrreqs.pru_peeraddr(msg); 261 /* msg invalid now */ 262 crit_exit(); 263 } 264 265 /* pru_rcvd is EOPNOTSUPP */ 266 /* pru_rcvoob is EOPNOTSUPP */ 267 268 static void 269 rts_send(netmsg_t msg) 270 { 271 crit_enter(); 272 raw_usrreqs.pru_send(msg); 273 /* msg invalid now */ 274 crit_exit(); 275 } 276 277 /* pru_sense is null */ 278 279 static void 280 rts_shutdown(netmsg_t msg) 281 { 282 crit_enter(); 283 raw_usrreqs.pru_shutdown(msg); 284 /* msg invalid now */ 285 crit_exit(); 286 } 287 288 static void 289 rts_sockaddr(netmsg_t msg) 290 { 291 crit_enter(); 292 raw_usrreqs.pru_sockaddr(msg); 293 /* msg invalid now */ 294 crit_exit(); 295 } 296 297 static struct pr_usrreqs route_usrreqs = { 298 .pru_abort = rts_abort, 299 .pru_accept = pr_generic_notsupp, 300 .pru_attach = rts_attach, 301 .pru_bind = rts_bind, 302 .pru_connect = rts_connect, 303 .pru_connect2 = pr_generic_notsupp, 304 .pru_control = pr_generic_notsupp, 305 .pru_detach = rts_detach, 306 .pru_disconnect = rts_disconnect, 307 .pru_listen = pr_generic_notsupp, 308 .pru_peeraddr = rts_peeraddr, 309 .pru_rcvd = pr_generic_notsupp, 310 .pru_rcvoob = pr_generic_notsupp, 311 .pru_send = rts_send, 312 .pru_sense = pru_sense_null, 313 .pru_shutdown = rts_shutdown, 314 .pru_sockaddr = rts_sockaddr, 315 .pru_sosend = sosend, 316 .pru_soreceive = soreceive 317 }; 318 319 static __inline sa_family_t 320 familyof(struct sockaddr *sa) 321 { 322 return (sa != NULL ? sa->sa_family : 0); 323 } 324 325 /* 326 * Routing socket input function. The packet must be serialized onto cpu 0. 327 * We use the cpu0_soport() netisr processing loop to handle it. 328 * 329 * This looks messy but it means that anyone, including interrupt code, 330 * can send a message to the routing socket. 331 */ 332 static void 333 rts_input_handler(netmsg_t msg) 334 { 335 static const struct sockaddr route_dst = { 2, PF_ROUTE, }; 336 struct sockproto route_proto; 337 struct netmsg_packet *pmsg = &msg->packet; 338 struct mbuf *m; 339 sa_family_t family; 340 struct rawcb *skip; 341 342 family = pmsg->base.lmsg.u.ms_result; 343 route_proto.sp_family = PF_ROUTE; 344 route_proto.sp_protocol = family; 345 346 m = pmsg->nm_packet; 347 M_ASSERTPKTHDR(m); 348 349 skip = m->m_pkthdr.header; 350 m->m_pkthdr.header = NULL; 351 352 raw_input(m, &route_proto, &route_src, &route_dst, skip); 353 } 354 355 static void 356 rts_input_skip(struct mbuf *m, sa_family_t family, struct rawcb *skip) 357 { 358 struct netmsg_packet *pmsg; 359 lwkt_port_t port; 360 361 M_ASSERTPKTHDR(m); 362 363 port = netisr_cpuport(0); /* XXX same as for routing socket */ 364 pmsg = &m->m_hdr.mh_netmsg; 365 netmsg_init(&pmsg->base, NULL, &netisr_apanic_rport, 366 0, rts_input_handler); 367 pmsg->nm_packet = m; 368 pmsg->base.lmsg.u.ms_result = family; 369 m->m_pkthdr.header = skip; /* XXX steal field in pkthdr */ 370 lwkt_sendmsg(port, &pmsg->base.lmsg); 371 } 372 373 static __inline void 374 rts_input(struct mbuf *m, sa_family_t family) 375 { 376 rts_input_skip(m, family, NULL); 377 } 378 379 static void * 380 reallocbuf_nofree(void *ptr, size_t len, size_t olen) 381 { 382 void *newptr; 383 384 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 385 if (newptr == NULL) 386 return NULL; 387 bcopy(ptr, newptr, olen); 388 return (newptr); 389 } 390 391 /* 392 * Internal helper routine for route_output(). 393 */ 394 static int 395 _fillrtmsg(struct rt_msghdr **prtm, struct rtentry *rt, 396 struct rt_addrinfo *rtinfo) 397 { 398 int msglen; 399 struct rt_msghdr *rtm = *prtm; 400 401 /* Fill in rt_addrinfo for call to rt_msg_buffer(). */ 402 rtinfo->rti_dst = rt_key(rt); 403 rtinfo->rti_gateway = rt->rt_gateway; 404 rtinfo->rti_netmask = rt_mask(rt); /* might be NULL */ 405 rtinfo->rti_genmask = rt->rt_genmask; /* might be NULL */ 406 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 407 if (rt->rt_ifp != NULL) { 408 rtinfo->rti_ifpaddr = 409 TAILQ_FIRST(&rt->rt_ifp->if_addrheads[mycpuid]) 410 ->ifa->ifa_addr; 411 rtinfo->rti_ifaaddr = rt->rt_ifa->ifa_addr; 412 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 413 rtinfo->rti_bcastaddr = rt->rt_ifa->ifa_dstaddr; 414 rtm->rtm_index = rt->rt_ifp->if_index; 415 } else { 416 rtinfo->rti_ifpaddr = NULL; 417 rtinfo->rti_ifaaddr = NULL; 418 } 419 } else if (rt->rt_ifp != NULL) { 420 rtm->rtm_index = rt->rt_ifp->if_index; 421 } 422 423 msglen = rt_msgsize(rtm->rtm_type, rtinfo); 424 if (rtm->rtm_msglen < msglen) { 425 /* NOTE: Caller will free the old rtm accordingly */ 426 rtm = reallocbuf_nofree(rtm, msglen, rtm->rtm_msglen); 427 if (rtm == NULL) 428 return (ENOBUFS); 429 *prtm = rtm; 430 } 431 rt_msg_buffer(rtm->rtm_type, rtinfo, rtm, msglen); 432 433 rtm->rtm_flags = rt->rt_flags; 434 rtm->rtm_rmx = rt->rt_rmx; 435 rtm->rtm_addrs = rtinfo->rti_addrs; 436 437 return (0); 438 } 439 440 struct rtm_arg { 441 struct rt_msghdr *bak_rtm; 442 struct rt_msghdr *new_rtm; 443 }; 444 445 static int 446 fillrtmsg(struct rtm_arg *arg, struct rtentry *rt, 447 struct rt_addrinfo *rtinfo) 448 { 449 struct rt_msghdr *rtm = arg->new_rtm; 450 int error; 451 452 error = _fillrtmsg(&rtm, rt, rtinfo); 453 if (!error) { 454 if (arg->new_rtm != rtm) { 455 /* 456 * _fillrtmsg() just allocated a new rtm; 457 * if the previously allocated rtm is not 458 * the backing rtm, it should be freed. 459 */ 460 if (arg->new_rtm != arg->bak_rtm) 461 kfree(arg->new_rtm, M_RTABLE); 462 arg->new_rtm = rtm; 463 } 464 } 465 return error; 466 } 467 468 static void route_output_add_callback(int, int, struct rt_addrinfo *, 469 struct rtentry *, void *); 470 static void route_output_delete_callback(int, int, struct rt_addrinfo *, 471 struct rtentry *, void *); 472 static int route_output_get_callback(int, struct rt_addrinfo *, 473 struct rtentry *, void *, int); 474 static int route_output_change_callback(int, struct rt_addrinfo *, 475 struct rtentry *, void *, int); 476 static int route_output_lock_callback(int, struct rt_addrinfo *, 477 struct rtentry *, void *, int); 478 479 /*ARGSUSED*/ 480 static int 481 route_output(struct mbuf *m, struct socket *so, ...) 482 { 483 struct rtm_arg arg; 484 struct rt_msghdr *rtm = NULL; 485 struct rawcb *rp = NULL; 486 struct pr_output_info *oi; 487 struct rt_addrinfo rtinfo; 488 sa_family_t family; 489 int len, error = 0; 490 __va_list ap; 491 492 M_ASSERTPKTHDR(m); 493 494 __va_start(ap, so); 495 oi = __va_arg(ap, struct pr_output_info *); 496 __va_end(ap); 497 498 family = familyof(NULL); 499 500 #define gotoerr(e) { error = e; goto flush;} 501 502 if (m == NULL || 503 (m->m_len < sizeof(long) && 504 (m = m_pullup(m, sizeof(long))) == NULL)) 505 return (ENOBUFS); 506 len = m->m_pkthdr.len; 507 if (len < sizeof(struct rt_msghdr) || 508 len != mtod(m, struct rt_msghdr *)->rtm_msglen) 509 gotoerr(EINVAL); 510 511 rtm = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 512 if (rtm == NULL) 513 gotoerr(ENOBUFS); 514 515 m_copydata(m, 0, len, (caddr_t)rtm); 516 if (rtm->rtm_version != RTM_VERSION) 517 gotoerr(EPROTONOSUPPORT); 518 519 rtm->rtm_pid = oi->p_pid; 520 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 521 rtinfo.rti_addrs = rtm->rtm_addrs; 522 if (rt_xaddrs((char *)(rtm + 1), (char *)rtm + len, &rtinfo) != 0) 523 gotoerr(EINVAL); 524 525 rtinfo.rti_flags = rtm->rtm_flags; 526 if (rtinfo.rti_dst == NULL || rtinfo.rti_dst->sa_family >= AF_MAX || 527 (rtinfo.rti_gateway && rtinfo.rti_gateway->sa_family >= AF_MAX)) 528 gotoerr(EINVAL); 529 530 family = familyof(rtinfo.rti_dst); 531 532 /* 533 * Verify that the caller has the appropriate privilege; RTM_GET 534 * is the only operation the non-superuser is allowed. 535 */ 536 if (rtm->rtm_type != RTM_GET && 537 priv_check_cred(so->so_cred, PRIV_ROOT, 0) != 0) 538 gotoerr(EPERM); 539 540 if (rtinfo.rti_genmask != NULL) { 541 error = rtmask_add_global(rtinfo.rti_genmask, 542 rtm->rtm_type != RTM_GET ? 543 RTREQ_PRIO_HIGH : RTREQ_PRIO_NORM); 544 if (error) 545 goto flush; 546 } 547 548 switch (rtm->rtm_type) { 549 case RTM_ADD: 550 if (rtinfo.rti_gateway == NULL) { 551 error = EINVAL; 552 } else { 553 error = rtrequest1_global(RTM_ADD, &rtinfo, 554 route_output_add_callback, rtm, RTREQ_PRIO_HIGH); 555 } 556 break; 557 case RTM_DELETE: 558 /* 559 * Backing rtm (bak_rtm) could _not_ be freed during 560 * rtrequest1_global or rtsearch_global, even if the 561 * callback reallocates the rtm due to its size changes, 562 * since rtinfo points to the backing rtm's memory area. 563 * After rtrequest1_global or rtsearch_global returns, 564 * it is safe to free the backing rtm, since rtinfo will 565 * not be used anymore. 566 * 567 * new_rtm will be used to save the new rtm allocated 568 * by rtrequest1_global or rtsearch_global. 569 */ 570 arg.bak_rtm = rtm; 571 arg.new_rtm = rtm; 572 error = rtrequest1_global(RTM_DELETE, &rtinfo, 573 route_output_delete_callback, &arg, RTREQ_PRIO_HIGH); 574 rtm = arg.new_rtm; 575 if (rtm != arg.bak_rtm) 576 kfree(arg.bak_rtm, M_RTABLE); 577 break; 578 case RTM_GET: 579 /* See the comment in RTM_DELETE */ 580 arg.bak_rtm = rtm; 581 arg.new_rtm = rtm; 582 error = rtsearch_global(RTM_GET, &rtinfo, 583 route_output_get_callback, &arg, RTS_NOEXACTMATCH, 584 RTREQ_PRIO_NORM); 585 rtm = arg.new_rtm; 586 if (rtm != arg.bak_rtm) 587 kfree(arg.bak_rtm, M_RTABLE); 588 break; 589 case RTM_CHANGE: 590 error = rtsearch_global(RTM_CHANGE, &rtinfo, 591 route_output_change_callback, rtm, RTS_EXACTMATCH, 592 RTREQ_PRIO_HIGH); 593 break; 594 case RTM_LOCK: 595 error = rtsearch_global(RTM_LOCK, &rtinfo, 596 route_output_lock_callback, rtm, RTS_EXACTMATCH, 597 RTREQ_PRIO_HIGH); 598 break; 599 default: 600 error = EOPNOTSUPP; 601 break; 602 } 603 flush: 604 if (rtm != NULL) { 605 if (error != 0) 606 rtm->rtm_errno = error; 607 else 608 rtm->rtm_flags |= RTF_DONE; 609 } 610 611 /* 612 * Check to see if we don't want our own messages. 613 */ 614 if (!(so->so_options & SO_USELOOPBACK)) { 615 if (route_cb.any_count <= 1) { 616 if (rtm != NULL) 617 kfree(rtm, M_RTABLE); 618 m_freem(m); 619 return (error); 620 } 621 /* There is another listener, so construct message */ 622 rp = sotorawcb(so); 623 } 624 if (rtm != NULL) { 625 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 626 if (m->m_pkthdr.len < rtm->rtm_msglen) { 627 m_freem(m); 628 m = NULL; 629 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 630 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 631 kfree(rtm, M_RTABLE); 632 } 633 if (m != NULL) 634 rts_input_skip(m, family, rp); 635 return (error); 636 } 637 638 static void 639 route_output_add_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 640 struct rtentry *rt, void *arg) 641 { 642 struct rt_msghdr *rtm = arg; 643 644 if (error == 0 && rt != NULL) { 645 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 646 &rt->rt_rmx); 647 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 648 rt->rt_rmx.rmx_locks |= 649 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 650 if (rtinfo->rti_genmask != NULL) { 651 rt->rt_genmask = rtmask_purelookup(rtinfo->rti_genmask); 652 if (rt->rt_genmask == NULL) { 653 /* 654 * This should not happen, since we 655 * have already installed genmask 656 * on each CPU before we reach here. 657 */ 658 panic("genmask is gone!?"); 659 } 660 } else { 661 rt->rt_genmask = NULL; 662 } 663 rtm->rtm_index = rt->rt_ifp->if_index; 664 } 665 } 666 667 static void 668 route_output_delete_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 669 struct rtentry *rt, void *arg) 670 { 671 if (error == 0 && rt) { 672 ++rt->rt_refcnt; 673 if (fillrtmsg(arg, rt, rtinfo) != 0) { 674 error = ENOBUFS; 675 /* XXX no way to return the error */ 676 } 677 --rt->rt_refcnt; 678 } 679 if (rt && rt->rt_refcnt == 0) { 680 ++rt->rt_refcnt; 681 rtfree(rt); 682 } 683 } 684 685 static int 686 route_output_get_callback(int cmd, struct rt_addrinfo *rtinfo, 687 struct rtentry *rt, void *arg, int found_cnt) 688 { 689 int error, found = 0; 690 691 if (((rtinfo->rti_flags ^ rt->rt_flags) & RTF_HOST) == 0) 692 found = 1; 693 694 error = fillrtmsg(arg, rt, rtinfo); 695 if (!error && found) { 696 /* Got the exact match, we could return now! */ 697 error = EJUSTRETURN; 698 } 699 return error; 700 } 701 702 static int 703 route_output_change_callback(int cmd, struct rt_addrinfo *rtinfo, 704 struct rtentry *rt, void *arg, int found_cnt) 705 { 706 struct rt_msghdr *rtm = arg; 707 struct ifaddr *ifa; 708 int error = 0; 709 710 /* 711 * new gateway could require new ifaddr, ifp; 712 * flags may also be different; ifp may be specified 713 * by ll sockaddr when protocol address is ambiguous 714 */ 715 if (((rt->rt_flags & RTF_GATEWAY) && rtinfo->rti_gateway != NULL) || 716 rtinfo->rti_ifpaddr != NULL || 717 (rtinfo->rti_ifaaddr != NULL && 718 !sa_equal(rtinfo->rti_ifaaddr, rt->rt_ifa->ifa_addr))) { 719 error = rt_getifa(rtinfo); 720 if (error != 0) 721 goto done; 722 } 723 if (rtinfo->rti_gateway != NULL) { 724 /* 725 * We only need to generate rtmsg upon the 726 * first route to be changed. 727 */ 728 error = rt_setgate(rt, rt_key(rt), rtinfo->rti_gateway, 729 found_cnt == 1 ? RTL_REPORTMSG : RTL_DONTREPORT); 730 if (error != 0) 731 goto done; 732 } 733 if ((ifa = rtinfo->rti_ifa) != NULL) { 734 struct ifaddr *oifa = rt->rt_ifa; 735 736 if (oifa != ifa) { 737 if (oifa && oifa->ifa_rtrequest) 738 oifa->ifa_rtrequest(RTM_DELETE, rt); 739 IFAFREE(rt->rt_ifa); 740 IFAREF(ifa); 741 rt->rt_ifa = ifa; 742 rt->rt_ifp = rtinfo->rti_ifp; 743 } 744 } 745 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, &rt->rt_rmx); 746 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 747 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt); 748 if (rtinfo->rti_genmask != NULL) { 749 rt->rt_genmask = rtmask_purelookup(rtinfo->rti_genmask); 750 if (rt->rt_genmask == NULL) { 751 /* 752 * This should not happen, since we 753 * have already installed genmask 754 * on each CPU before we reach here. 755 */ 756 panic("genmask is gone!?"); 757 } 758 } 759 rtm->rtm_index = rt->rt_ifp->if_index; 760 done: 761 return error; 762 } 763 764 static int 765 route_output_lock_callback(int cmd, struct rt_addrinfo *rtinfo, 766 struct rtentry *rt, void *arg, 767 int found_cnt __unused) 768 { 769 struct rt_msghdr *rtm = arg; 770 771 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 772 rt->rt_rmx.rmx_locks |= 773 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 774 return 0; 775 } 776 777 static void 778 rt_setmetrics(u_long which, struct rt_metrics *in, struct rt_metrics *out) 779 { 780 #define setmetric(flag, elt) if (which & (flag)) out->elt = in->elt; 781 setmetric(RTV_RPIPE, rmx_recvpipe); 782 setmetric(RTV_SPIPE, rmx_sendpipe); 783 setmetric(RTV_SSTHRESH, rmx_ssthresh); 784 setmetric(RTV_RTT, rmx_rtt); 785 setmetric(RTV_RTTVAR, rmx_rttvar); 786 setmetric(RTV_HOPCOUNT, rmx_hopcount); 787 setmetric(RTV_MTU, rmx_mtu); 788 setmetric(RTV_EXPIRE, rmx_expire); 789 setmetric(RTV_MSL, rmx_msl); 790 setmetric(RTV_IWMAXSEGS, rmx_iwmaxsegs); 791 setmetric(RTV_IWCAPSEGS, rmx_iwcapsegs); 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 void 1317 ifnet_compute_stats(struct ifnet *ifp) 1318 { 1319 IFNET_STAT_GET(ifp, ipackets, ifp->if_ipackets); 1320 IFNET_STAT_GET(ifp, ierrors, ifp->if_ierrors); 1321 IFNET_STAT_GET(ifp, opackets, ifp->if_opackets); 1322 IFNET_STAT_GET(ifp, collisions, ifp->if_collisions); 1323 IFNET_STAT_GET(ifp, ibytes, ifp->if_ibytes); 1324 IFNET_STAT_GET(ifp, obytes, ifp->if_obytes); 1325 IFNET_STAT_GET(ifp, imcasts, ifp->if_imcasts); 1326 IFNET_STAT_GET(ifp, omcasts, ifp->if_omcasts); 1327 IFNET_STAT_GET(ifp, iqdrops, ifp->if_iqdrops); 1328 IFNET_STAT_GET(ifp, noproto, ifp->if_noproto); 1329 } 1330 1331 static int 1332 sysctl_iflist(int af, struct walkarg *w) 1333 { 1334 struct ifnet *ifp; 1335 struct rt_addrinfo rtinfo; 1336 int msglen, error; 1337 1338 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1339 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1340 struct ifaddr_container *ifac; 1341 struct ifaddr *ifa; 1342 1343 if (w->w_arg && w->w_arg != ifp->if_index) 1344 continue; 1345 ifac = TAILQ_FIRST(&ifp->if_addrheads[mycpuid]); 1346 ifa = ifac->ifa; 1347 rtinfo.rti_ifpaddr = ifa->ifa_addr; 1348 msglen = rt_msgsize(RTM_IFINFO, &rtinfo); 1349 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0) 1350 return (ENOMEM); 1351 rt_msg_buffer(RTM_IFINFO, &rtinfo, w->w_tmem, msglen); 1352 rtinfo.rti_ifpaddr = NULL; 1353 if (w->w_req != NULL && w->w_tmem != NULL) { 1354 struct if_msghdr *ifm = w->w_tmem; 1355 1356 ifm->ifm_index = ifp->if_index; 1357 ifm->ifm_flags = ifp->if_flags; 1358 ifnet_compute_stats(ifp); 1359 ifm->ifm_data = ifp->if_data; 1360 ifm->ifm_addrs = rtinfo.rti_addrs; 1361 error = SYSCTL_OUT(w->w_req, ifm, msglen); 1362 if (error) 1363 return (error); 1364 } 1365 while ((ifac = TAILQ_NEXT(ifac, ifa_link)) != NULL) { 1366 ifa = ifac->ifa; 1367 1368 if (af && af != ifa->ifa_addr->sa_family) 1369 continue; 1370 if (curproc->p_ucred->cr_prison && 1371 prison_if(curproc->p_ucred, ifa->ifa_addr)) 1372 continue; 1373 rtinfo.rti_ifaaddr = ifa->ifa_addr; 1374 rtinfo.rti_netmask = ifa->ifa_netmask; 1375 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr; 1376 msglen = rt_msgsize(RTM_NEWADDR, &rtinfo); 1377 if (w->w_tmemsize < msglen && 1378 resizewalkarg(w, msglen) != 0) 1379 return (ENOMEM); 1380 rt_msg_buffer(RTM_NEWADDR, &rtinfo, w->w_tmem, msglen); 1381 if (w->w_req != NULL) { 1382 struct ifa_msghdr *ifam = w->w_tmem; 1383 1384 ifam->ifam_index = ifa->ifa_ifp->if_index; 1385 ifam->ifam_flags = ifa->ifa_flags; 1386 ifam->ifam_metric = ifa->ifa_metric; 1387 ifam->ifam_addrs = rtinfo.rti_addrs; 1388 error = SYSCTL_OUT(w->w_req, w->w_tmem, msglen); 1389 if (error) 1390 return (error); 1391 } 1392 } 1393 rtinfo.rti_netmask = NULL; 1394 rtinfo.rti_ifaaddr = NULL; 1395 rtinfo.rti_bcastaddr = NULL; 1396 } 1397 return (0); 1398 } 1399 1400 static int 1401 sysctl_rtsock(SYSCTL_HANDLER_ARGS) 1402 { 1403 int *name = (int *)arg1; 1404 u_int namelen = arg2; 1405 struct radix_node_head *rnh; 1406 int i, error = EINVAL; 1407 int origcpu; 1408 u_char af; 1409 struct walkarg w; 1410 1411 name ++; 1412 namelen--; 1413 if (req->newptr) 1414 return (EPERM); 1415 if (namelen != 3 && namelen != 4) 1416 return (EINVAL); 1417 af = name[0]; 1418 bzero(&w, sizeof w); 1419 w.w_op = name[1]; 1420 w.w_arg = name[2]; 1421 w.w_req = req; 1422 1423 /* 1424 * Optional third argument specifies cpu, used primarily for 1425 * debugging the route table. 1426 */ 1427 if (namelen == 4) { 1428 if (name[3] < 0 || name[3] >= ncpus) 1429 return (EINVAL); 1430 origcpu = mycpuid; 1431 lwkt_migratecpu(name[3]); 1432 } else { 1433 origcpu = -1; 1434 } 1435 crit_enter(); 1436 switch (w.w_op) { 1437 case NET_RT_DUMP: 1438 case NET_RT_FLAGS: 1439 for (i = 1; i <= AF_MAX; i++) 1440 if ((rnh = rt_tables[mycpuid][i]) && 1441 (af == 0 || af == i) && 1442 (error = rnh->rnh_walktree(rnh, 1443 sysctl_dumpentry, &w))) 1444 break; 1445 break; 1446 1447 case NET_RT_IFLIST: 1448 error = sysctl_iflist(af, &w); 1449 } 1450 crit_exit(); 1451 if (w.w_tmem != NULL) 1452 kfree(w.w_tmem, M_RTABLE); 1453 if (origcpu >= 0) 1454 lwkt_migratecpu(origcpu); 1455 return (error); 1456 } 1457 1458 SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, ""); 1459 1460 /* 1461 * Definitions of protocols supported in the ROUTE domain. 1462 */ 1463 1464 static struct domain routedomain; /* or at least forward */ 1465 1466 static struct protosw routesw[] = { 1467 { 1468 .pr_type = SOCK_RAW, 1469 .pr_domain = &routedomain, 1470 .pr_protocol = 0, 1471 .pr_flags = PR_ATOMIC|PR_ADDR, 1472 .pr_input = NULL, 1473 .pr_output = route_output, 1474 .pr_ctlinput = raw_ctlinput, 1475 .pr_ctloutput = NULL, 1476 .pr_ctlport = cpu0_ctlport, 1477 1478 .pr_init = raw_init, 1479 .pr_usrreqs = &route_usrreqs 1480 } 1481 }; 1482 1483 static struct domain routedomain = { 1484 PF_ROUTE, "route", NULL, NULL, NULL, 1485 routesw, &routesw[(sizeof routesw)/(sizeof routesw[0])], 1486 }; 1487 1488 DOMAIN_SET(route); 1489
Cache object: caf78eb668ef473f37767c0e41f69613
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