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 1.44 2008/07/07 22:02:10 nant Exp $ 68 */ 69 70 #include "opt_sctp.h" 71 72 #include <sys/param.h> 73 #include <sys/systm.h> 74 #include <sys/kernel.h> 75 #include <sys/sysctl.h> 76 #include <sys/proc.h> 77 #include <sys/malloc.h> 78 #include <sys/mbuf.h> 79 #include <sys/protosw.h> 80 #include <sys/socket.h> 81 #include <sys/socketvar.h> 82 #include <sys/domain.h> 83 #include <sys/thread2.h> 84 85 #include <net/if.h> 86 #include <net/route.h> 87 #include <net/raw_cb.h> 88 #include <net/netmsg2.h> 89 90 #ifdef SCTP 91 extern void sctp_add_ip_address(struct ifaddr *ifa); 92 extern void sctp_delete_ip_address(struct ifaddr *ifa); 93 #endif /* SCTP */ 94 95 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables"); 96 97 static struct route_cb { 98 int ip_count; 99 int ip6_count; 100 int ipx_count; 101 int ns_count; 102 int any_count; 103 } route_cb; 104 105 static const struct sockaddr route_src = { 2, PF_ROUTE, }; 106 107 struct walkarg { 108 int w_tmemsize; 109 int w_op, w_arg; 110 void *w_tmem; 111 struct sysctl_req *w_req; 112 }; 113 114 static struct mbuf * 115 rt_msg_mbuf (int, struct rt_addrinfo *); 116 static void rt_msg_buffer (int, struct rt_addrinfo *, void *buf, int len); 117 static int rt_msgsize (int type, struct rt_addrinfo *rtinfo); 118 static int rt_xaddrs (char *, char *, struct rt_addrinfo *); 119 static int sysctl_dumpentry (struct radix_node *rn, void *vw); 120 static int sysctl_iflist (int af, struct walkarg *w); 121 static int route_output(struct mbuf *, struct socket *, ...); 122 static void rt_setmetrics (u_long, struct rt_metrics *, 123 struct rt_metrics *); 124 125 /* 126 * It really doesn't make any sense at all for this code to share much 127 * with raw_usrreq.c, since its functionality is so restricted. XXX 128 */ 129 static int 130 rts_abort(struct socket *so) 131 { 132 int error; 133 134 crit_enter(); 135 error = raw_usrreqs.pru_abort(so); 136 crit_exit(); 137 return error; 138 } 139 140 /* pru_accept is EOPNOTSUPP */ 141 142 static int 143 rts_attach(struct socket *so, int proto, struct pru_attach_info *ai) 144 { 145 struct rawcb *rp; 146 int error; 147 148 if (sotorawcb(so) != NULL) 149 return EISCONN; /* XXX panic? */ 150 151 rp = kmalloc(sizeof *rp, M_PCB, M_WAITOK | M_ZERO); 152 153 /* 154 * The critical section is necessary to block protocols from sending 155 * error notifications (like RTM_REDIRECT or RTM_LOSING) while 156 * this PCB is extant but incompletely initialized. 157 * Probably we should try to do more of this work beforehand and 158 * eliminate the critical section. 159 */ 160 crit_enter(); 161 so->so_pcb = rp; 162 error = raw_attach(so, proto, ai->sb_rlimit); 163 rp = sotorawcb(so); 164 if (error) { 165 crit_exit(); 166 kfree(rp, M_PCB); 167 return error; 168 } 169 switch(rp->rcb_proto.sp_protocol) { 170 case AF_INET: 171 route_cb.ip_count++; 172 break; 173 case AF_INET6: 174 route_cb.ip6_count++; 175 break; 176 case AF_IPX: 177 route_cb.ipx_count++; 178 break; 179 case AF_NS: 180 route_cb.ns_count++; 181 break; 182 } 183 rp->rcb_faddr = &route_src; 184 route_cb.any_count++; 185 soisconnected(so); 186 so->so_options |= SO_USELOOPBACK; 187 crit_exit(); 188 return 0; 189 } 190 191 static int 192 rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 193 { 194 int error; 195 196 crit_enter(); 197 error = raw_usrreqs.pru_bind(so, nam, td); /* xxx just EINVAL */ 198 crit_exit(); 199 return error; 200 } 201 202 static int 203 rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 204 { 205 int error; 206 207 crit_enter(); 208 error = raw_usrreqs.pru_connect(so, nam, td); /* XXX just EINVAL */ 209 crit_exit(); 210 return error; 211 } 212 213 /* pru_connect2 is EOPNOTSUPP */ 214 /* pru_control is EOPNOTSUPP */ 215 216 static int 217 rts_detach(struct socket *so) 218 { 219 struct rawcb *rp = sotorawcb(so); 220 int error; 221 222 crit_enter(); 223 if (rp != NULL) { 224 switch(rp->rcb_proto.sp_protocol) { 225 case AF_INET: 226 route_cb.ip_count--; 227 break; 228 case AF_INET6: 229 route_cb.ip6_count--; 230 break; 231 case AF_IPX: 232 route_cb.ipx_count--; 233 break; 234 case AF_NS: 235 route_cb.ns_count--; 236 break; 237 } 238 route_cb.any_count--; 239 } 240 error = raw_usrreqs.pru_detach(so); 241 crit_exit(); 242 return error; 243 } 244 245 static int 246 rts_disconnect(struct socket *so) 247 { 248 int error; 249 250 crit_enter(); 251 error = raw_usrreqs.pru_disconnect(so); 252 crit_exit(); 253 return error; 254 } 255 256 /* pru_listen is EOPNOTSUPP */ 257 258 static int 259 rts_peeraddr(struct socket *so, struct sockaddr **nam) 260 { 261 int error; 262 263 crit_enter(); 264 error = raw_usrreqs.pru_peeraddr(so, nam); 265 crit_exit(); 266 return error; 267 } 268 269 /* pru_rcvd is EOPNOTSUPP */ 270 /* pru_rcvoob is EOPNOTSUPP */ 271 272 static int 273 rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 274 struct mbuf *control, struct thread *td) 275 { 276 int error; 277 278 crit_enter(); 279 error = raw_usrreqs.pru_send(so, flags, m, nam, control, td); 280 crit_exit(); 281 return error; 282 } 283 284 /* pru_sense is null */ 285 286 static int 287 rts_shutdown(struct socket *so) 288 { 289 int error; 290 291 crit_enter(); 292 error = raw_usrreqs.pru_shutdown(so); 293 crit_exit(); 294 return error; 295 } 296 297 static int 298 rts_sockaddr(struct socket *so, struct sockaddr **nam) 299 { 300 int error; 301 302 crit_enter(); 303 error = raw_usrreqs.pru_sockaddr(so, nam); 304 crit_exit(); 305 return error; 306 } 307 308 static struct pr_usrreqs route_usrreqs = { 309 .pru_abort = rts_abort, 310 .pru_accept = pru_accept_notsupp, 311 .pru_attach = rts_attach, 312 .pru_bind = rts_bind, 313 .pru_connect = rts_connect, 314 .pru_connect2 = pru_connect2_notsupp, 315 .pru_control = pru_control_notsupp, 316 .pru_detach = rts_detach, 317 .pru_disconnect = rts_disconnect, 318 .pru_listen = pru_listen_notsupp, 319 .pru_peeraddr = rts_peeraddr, 320 .pru_rcvd = pru_rcvd_notsupp, 321 .pru_rcvoob = pru_rcvoob_notsupp, 322 .pru_send = rts_send, 323 .pru_sense = pru_sense_null, 324 .pru_shutdown = rts_shutdown, 325 .pru_sockaddr = rts_sockaddr, 326 .pru_sosend = sosend, 327 .pru_soreceive = soreceive, 328 .pru_sopoll = sopoll 329 }; 330 331 static __inline sa_family_t 332 familyof(struct sockaddr *sa) 333 { 334 return (sa != NULL ? sa->sa_family : 0); 335 } 336 337 /* 338 * Routing socket input function. The packet must be serialized onto cpu 0. 339 * We use the cpu0_soport() netisr processing loop to handle it. 340 * 341 * This looks messy but it means that anyone, including interrupt code, 342 * can send a message to the routing socket. 343 */ 344 static void 345 rts_input_handler(struct netmsg *msg) 346 { 347 static const struct sockaddr route_dst = { 2, PF_ROUTE, }; 348 struct sockproto route_proto; 349 struct netmsg_packet *pmsg; 350 struct mbuf *m; 351 sa_family_t family; 352 353 pmsg = (void *)msg; 354 m = pmsg->nm_packet; 355 family = pmsg->nm_netmsg.nm_lmsg.u.ms_result; 356 route_proto.sp_family = PF_ROUTE; 357 route_proto.sp_protocol = family; 358 359 raw_input(m, &route_proto, &route_src, &route_dst); 360 } 361 362 static void 363 rts_input(struct mbuf *m, sa_family_t family) 364 { 365 struct netmsg_packet *pmsg; 366 lwkt_port_t port; 367 368 port = cpu0_soport(NULL, NULL, NULL, 0); 369 pmsg = &m->m_hdr.mh_netmsg; 370 netmsg_init(&pmsg->nm_netmsg, &netisr_apanic_rport, 371 0, rts_input_handler); 372 pmsg->nm_packet = m; 373 pmsg->nm_netmsg.nm_lmsg.u.ms_result = family; 374 lwkt_sendmsg(port, &pmsg->nm_netmsg.nm_lmsg); 375 } 376 377 static void * 378 reallocbuf(void *ptr, size_t len, size_t olen) 379 { 380 void *newptr; 381 382 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 383 if (newptr == NULL) 384 return NULL; 385 bcopy(ptr, newptr, olen); 386 kfree(ptr, M_RTABLE); 387 return (newptr); 388 } 389 390 /* 391 * Internal helper routine for route_output(). 392 */ 393 static int 394 fillrtmsg(struct rt_msghdr **prtm, struct rtentry *rt, 395 struct rt_addrinfo *rtinfo) 396 { 397 int msglen; 398 struct rt_msghdr *rtm = *prtm; 399 400 /* Fill in rt_addrinfo for call to rt_msg_buffer(). */ 401 rtinfo->rti_dst = rt_key(rt); 402 rtinfo->rti_gateway = rt->rt_gateway; 403 rtinfo->rti_netmask = rt_mask(rt); /* might be NULL */ 404 rtinfo->rti_genmask = rt->rt_genmask; /* might be NULL */ 405 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 406 if (rt->rt_ifp != NULL) { 407 rtinfo->rti_ifpaddr = 408 TAILQ_FIRST(&rt->rt_ifp->if_addrheads[mycpuid]) 409 ->ifa->ifa_addr; 410 rtinfo->rti_ifaaddr = rt->rt_ifa->ifa_addr; 411 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 412 rtinfo->rti_bcastaddr = rt->rt_ifa->ifa_dstaddr; 413 rtm->rtm_index = rt->rt_ifp->if_index; 414 } else { 415 rtinfo->rti_ifpaddr = NULL; 416 rtinfo->rti_ifaaddr = NULL; 417 } 418 } 419 420 msglen = rt_msgsize(rtm->rtm_type, rtinfo); 421 if (rtm->rtm_msglen < msglen) { 422 rtm = reallocbuf(rtm, msglen, rtm->rtm_msglen); 423 if (rtm == NULL) 424 return (ENOBUFS); 425 *prtm = rtm; 426 } 427 rt_msg_buffer(rtm->rtm_type, rtinfo, rtm, msglen); 428 429 rtm->rtm_flags = rt->rt_flags; 430 rtm->rtm_rmx = rt->rt_rmx; 431 rtm->rtm_addrs = rtinfo->rti_addrs; 432 433 return (0); 434 } 435 436 static void route_output_add_callback(int, int, struct rt_addrinfo *, 437 struct rtentry *, void *); 438 static void route_output_delete_callback(int, int, struct rt_addrinfo *, 439 struct rtentry *, void *); 440 static void route_output_change_callback(int, int, struct rt_addrinfo *, 441 struct rtentry *, void *); 442 static void route_output_lock_callback(int, int, struct rt_addrinfo *, 443 struct rtentry *, void *); 444 445 /*ARGSUSED*/ 446 static int 447 route_output(struct mbuf *m, struct socket *so, ...) 448 { 449 struct rt_msghdr *rtm = NULL; 450 struct rtentry *rt; 451 struct radix_node_head *rnh; 452 struct rawcb *rp = NULL; 453 struct pr_output_info *oi; 454 struct rt_addrinfo rtinfo; 455 int len, error = 0; 456 __va_list ap; 457 458 __va_start(ap, so); 459 oi = __va_arg(ap, struct pr_output_info *); 460 __va_end(ap); 461 462 #define gotoerr(e) { error = e; goto flush;} 463 464 if (m == NULL || 465 (m->m_len < sizeof(long) && 466 (m = m_pullup(m, sizeof(long))) == NULL)) 467 return (ENOBUFS); 468 if (!(m->m_flags & M_PKTHDR)) 469 panic("route_output"); 470 len = m->m_pkthdr.len; 471 if (len < sizeof(struct rt_msghdr) || 472 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 473 rtinfo.rti_dst = NULL; 474 gotoerr(EINVAL); 475 } 476 rtm = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 477 if (rtm == NULL) { 478 rtinfo.rti_dst = NULL; 479 gotoerr(ENOBUFS); 480 } 481 m_copydata(m, 0, len, (caddr_t)rtm); 482 if (rtm->rtm_version != RTM_VERSION) { 483 rtinfo.rti_dst = NULL; 484 gotoerr(EPROTONOSUPPORT); 485 } 486 rtm->rtm_pid = oi->p_pid; 487 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 488 rtinfo.rti_addrs = rtm->rtm_addrs; 489 if (rt_xaddrs((char *)(rtm + 1), (char *)rtm + len, &rtinfo) != 0) { 490 rtinfo.rti_dst = NULL; 491 gotoerr(EINVAL); 492 } 493 rtinfo.rti_flags = rtm->rtm_flags; 494 if (rtinfo.rti_dst == NULL || rtinfo.rti_dst->sa_family >= AF_MAX || 495 (rtinfo.rti_gateway && rtinfo.rti_gateway->sa_family >= AF_MAX)) 496 gotoerr(EINVAL); 497 498 if (rtinfo.rti_genmask != NULL) { 499 struct radix_node *n; 500 501 #define clen(s) (*(u_char *)(s)) 502 n = rn_addmask((char *)rtinfo.rti_genmask, TRUE, 1); 503 if (n != NULL && 504 rtinfo.rti_genmask->sa_len >= clen(n->rn_key) && 505 bcmp((char *)rtinfo.rti_genmask + 1, 506 (char *)n->rn_key + 1, clen(n->rn_key) - 1) == 0) 507 rtinfo.rti_genmask = (struct sockaddr *)n->rn_key; 508 else 509 gotoerr(ENOBUFS); 510 } 511 512 /* 513 * Verify that the caller has the appropriate privilege; RTM_GET 514 * is the only operation the non-superuser is allowed. 515 */ 516 if (rtm->rtm_type != RTM_GET && suser_cred(so->so_cred, 0) != 0) 517 gotoerr(EPERM); 518 519 switch (rtm->rtm_type) { 520 case RTM_ADD: 521 if (rtinfo.rti_gateway == NULL) { 522 error = EINVAL; 523 } else { 524 error = rtrequest1_global(RTM_ADD, &rtinfo, 525 route_output_add_callback, rtm); 526 } 527 break; 528 case RTM_DELETE: 529 /* 530 * note: &rtm passed as argument so 'rtm' can be replaced. 531 */ 532 error = rtrequest1_global(RTM_DELETE, &rtinfo, 533 route_output_delete_callback, &rtm); 534 break; 535 case RTM_GET: 536 rnh = rt_tables[mycpuid][rtinfo.rti_dst->sa_family]; 537 if (rnh == NULL) { 538 error = EAFNOSUPPORT; 539 break; 540 } 541 rt = (struct rtentry *) 542 rnh->rnh_lookup((char *)rtinfo.rti_dst, 543 (char *)rtinfo.rti_netmask, rnh); 544 if (rt == NULL) { 545 error = ESRCH; 546 break; 547 } 548 rt->rt_refcnt++; 549 if (fillrtmsg(&rtm, rt, &rtinfo) != 0) 550 gotoerr(ENOBUFS); 551 --rt->rt_refcnt; 552 break; 553 case RTM_CHANGE: 554 error = rtrequest1_global(RTM_GET, &rtinfo, 555 route_output_change_callback, rtm); 556 break; 557 case RTM_LOCK: 558 error = rtrequest1_global(RTM_GET, &rtinfo, 559 route_output_lock_callback, rtm); 560 break; 561 default: 562 error = EOPNOTSUPP; 563 break; 564 } 565 566 flush: 567 if (rtm != NULL) { 568 if (error != 0) 569 rtm->rtm_errno = error; 570 else 571 rtm->rtm_flags |= RTF_DONE; 572 } 573 574 /* 575 * Check to see if we don't want our own messages. 576 */ 577 if (!(so->so_options & SO_USELOOPBACK)) { 578 if (route_cb.any_count <= 1) { 579 if (rtm != NULL) 580 kfree(rtm, M_RTABLE); 581 m_freem(m); 582 return (error); 583 } 584 /* There is another listener, so construct message */ 585 rp = sotorawcb(so); 586 } 587 if (rtm != NULL) { 588 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 589 if (m->m_pkthdr.len < rtm->rtm_msglen) { 590 m_freem(m); 591 m = NULL; 592 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 593 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 594 kfree(rtm, M_RTABLE); 595 } 596 if (rp != NULL) 597 rp->rcb_proto.sp_family = 0; /* Avoid us */ 598 if (m != NULL) 599 rts_input(m, familyof(rtinfo.rti_dst)); 600 if (rp != NULL) 601 rp->rcb_proto.sp_family = PF_ROUTE; 602 return (error); 603 } 604 605 static void 606 route_output_add_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 607 struct rtentry *rt, void *arg) 608 { 609 struct rt_msghdr *rtm = arg; 610 611 if (error == 0 && rt != NULL) { 612 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 613 &rt->rt_rmx); 614 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 615 rt->rt_rmx.rmx_locks |= 616 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 617 rt->rt_genmask = rtinfo->rti_genmask; 618 } 619 } 620 621 static void 622 route_output_delete_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 623 struct rtentry *rt, void *arg) 624 { 625 struct rt_msghdr **rtm = arg; 626 627 if (error == 0 && rt) { 628 ++rt->rt_refcnt; 629 if (fillrtmsg(rtm, rt, rtinfo) != 0) { 630 error = ENOBUFS; 631 /* XXX no way to return the error */ 632 } 633 --rt->rt_refcnt; 634 } 635 } 636 637 static void 638 route_output_change_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 639 struct rtentry *rt, void *arg) 640 { 641 struct rt_msghdr *rtm = arg; 642 struct ifaddr *ifa; 643 644 if (error) 645 goto done; 646 647 /* 648 * new gateway could require new ifaddr, ifp; 649 * flags may also be different; ifp may be specified 650 * by ll sockaddr when protocol address is ambiguous 651 */ 652 if (((rt->rt_flags & RTF_GATEWAY) && rtinfo->rti_gateway != NULL) || 653 rtinfo->rti_ifpaddr != NULL || (rtinfo->rti_ifaaddr != NULL && 654 sa_equal(rtinfo->rti_ifaaddr, rt->rt_ifa->ifa_addr)) 655 ) { 656 error = rt_getifa(rtinfo); 657 if (error != 0) 658 goto done; 659 } 660 if (rtinfo->rti_gateway != NULL) { 661 error = rt_setgate(rt, rt_key(rt), rtinfo->rti_gateway); 662 if (error != 0) 663 goto done; 664 } 665 if ((ifa = rtinfo->rti_ifa) != NULL) { 666 struct ifaddr *oifa = rt->rt_ifa; 667 668 if (oifa != ifa) { 669 if (oifa && oifa->ifa_rtrequest) 670 oifa->ifa_rtrequest(RTM_DELETE, rt, rtinfo); 671 IFAFREE(rt->rt_ifa); 672 IFAREF(ifa); 673 rt->rt_ifa = ifa; 674 rt->rt_ifp = rtinfo->rti_ifp; 675 } 676 } 677 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, &rt->rt_rmx); 678 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 679 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, rtinfo); 680 if (rtinfo->rti_genmask != NULL) 681 rt->rt_genmask = rtinfo->rti_genmask; 682 done: 683 /* XXX no way to return error */ 684 ; 685 } 686 687 static void 688 route_output_lock_callback(int cmd, int error, struct rt_addrinfo *rtinfo, 689 struct rtentry *rt, void *arg) 690 { 691 struct rt_msghdr *rtm = arg; 692 693 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 694 rt->rt_rmx.rmx_locks |= 695 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 696 } 697 698 static void 699 rt_setmetrics(u_long which, struct rt_metrics *in, struct rt_metrics *out) 700 { 701 #define setmetric(flag, elt) if (which & (flag)) out->elt = in->elt; 702 setmetric(RTV_RPIPE, rmx_recvpipe); 703 setmetric(RTV_SPIPE, rmx_sendpipe); 704 setmetric(RTV_SSTHRESH, rmx_ssthresh); 705 setmetric(RTV_RTT, rmx_rtt); 706 setmetric(RTV_RTTVAR, rmx_rttvar); 707 setmetric(RTV_HOPCOUNT, rmx_hopcount); 708 setmetric(RTV_MTU, rmx_mtu); 709 setmetric(RTV_EXPIRE, rmx_expire); 710 #undef setmetric 711 } 712 713 #define ROUNDUP(a) \ 714 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 715 716 /* 717 * Extract the addresses of the passed sockaddrs. 718 * Do a little sanity checking so as to avoid bad memory references. 719 * This data is derived straight from userland. 720 */ 721 static int 722 rt_xaddrs(char *cp, char *cplim, struct rt_addrinfo *rtinfo) 723 { 724 struct sockaddr *sa; 725 int i; 726 727 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 728 if ((rtinfo->rti_addrs & (1 << i)) == 0) 729 continue; 730 sa = (struct sockaddr *)cp; 731 /* 732 * It won't fit. 733 */ 734 if ((cp + sa->sa_len) > cplim) { 735 return (EINVAL); 736 } 737 738 /* 739 * There are no more... Quit now. 740 * If there are more bits, they are in error. 741 * I've seen this. route(1) can evidently generate these. 742 * This causes kernel to core dump. 743 * For compatibility, if we see this, point to a safe address. 744 */ 745 if (sa->sa_len == 0) { 746 static struct sockaddr sa_zero = { 747 sizeof sa_zero, AF_INET, 748 }; 749 750 rtinfo->rti_info[i] = &sa_zero; 751 kprintf("rtsock: received more addr bits than sockaddrs.\n"); 752 return (0); /* should be EINVAL but for compat */ 753 } 754 755 /* Accept the sockaddr. */ 756 rtinfo->rti_info[i] = sa; 757 cp += ROUNDUP(sa->sa_len); 758 } 759 return (0); 760 } 761 762 static int 763 rt_msghdrsize(int type) 764 { 765 switch (type) { 766 case RTM_DELADDR: 767 case RTM_NEWADDR: 768 return sizeof(struct ifa_msghdr); 769 case RTM_DELMADDR: 770 case RTM_NEWMADDR: 771 return sizeof(struct ifma_msghdr); 772 case RTM_IFINFO: 773 return sizeof(struct if_msghdr); 774 case RTM_IFANNOUNCE: 775 case RTM_IEEE80211: 776 return sizeof(struct if_announcemsghdr); 777 default: 778 return sizeof(struct rt_msghdr); 779 } 780 } 781 782 static int 783 rt_msgsize(int type, struct rt_addrinfo *rtinfo) 784 { 785 int len, i; 786 787 len = rt_msghdrsize(type); 788 for (i = 0; i < RTAX_MAX; i++) { 789 if (rtinfo->rti_info[i] != NULL) 790 len += ROUNDUP(rtinfo->rti_info[i]->sa_len); 791 } 792 len = ALIGN(len); 793 return len; 794 } 795 796 /* 797 * Build a routing message in a buffer. 798 * Copy the addresses in the rtinfo->rti_info[] sockaddr array 799 * to the end of the buffer after the message header. 800 * 801 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[]. 802 * This side-effect can be avoided if we reorder the addrs bitmask field in all 803 * the route messages to line up so we can set it here instead of back in the 804 * calling routine. 805 */ 806 static void 807 rt_msg_buffer(int type, struct rt_addrinfo *rtinfo, void *buf, int msglen) 808 { 809 struct rt_msghdr *rtm; 810 char *cp; 811 int dlen, i; 812 813 rtm = (struct rt_msghdr *) buf; 814 rtm->rtm_version = RTM_VERSION; 815 rtm->rtm_type = type; 816 rtm->rtm_msglen = msglen; 817 818 cp = (char *)buf + rt_msghdrsize(type); 819 rtinfo->rti_addrs = 0; 820 for (i = 0; i < RTAX_MAX; i++) { 821 struct sockaddr *sa; 822 823 if ((sa = rtinfo->rti_info[i]) == NULL) 824 continue; 825 rtinfo->rti_addrs |= (1 << i); 826 dlen = ROUNDUP(sa->sa_len); 827 bcopy(sa, cp, dlen); 828 cp += dlen; 829 } 830 } 831 832 /* 833 * Build a routing message in a mbuf chain. 834 * Copy the addresses in the rtinfo->rti_info[] sockaddr array 835 * to the end of the mbuf after the message header. 836 * 837 * Set the rtinfo->rti_addrs bitmask of addresses present in rtinfo->rti_info[]. 838 * This side-effect can be avoided if we reorder the addrs bitmask field in all 839 * the route messages to line up so we can set it here instead of back in the 840 * calling routine. 841 */ 842 static struct mbuf * 843 rt_msg_mbuf(int type, struct rt_addrinfo *rtinfo) 844 { 845 struct mbuf *m; 846 struct rt_msghdr *rtm; 847 int hlen, len; 848 int i; 849 850 hlen = rt_msghdrsize(type); 851 KASSERT(hlen <= MCLBYTES, ("rt_msg_mbuf: hlen %d doesn't fit", hlen)); 852 853 m = m_getl(hlen, MB_DONTWAIT, MT_DATA, M_PKTHDR, NULL); 854 if (m == NULL) 855 return (NULL); 856 mbuftrackid(m, 32); 857 m->m_pkthdr.len = m->m_len = hlen; 858 m->m_pkthdr.rcvif = NULL; 859 rtinfo->rti_addrs = 0; 860 len = hlen; 861 for (i = 0; i < RTAX_MAX; i++) { 862 struct sockaddr *sa; 863 int dlen; 864 865 if ((sa = rtinfo->rti_info[i]) == NULL) 866 continue; 867 rtinfo->rti_addrs |= (1 << i); 868 dlen = ROUNDUP(sa->sa_len); 869 m_copyback(m, len, dlen, (caddr_t)sa); /* can grow mbuf chain */ 870 len += dlen; 871 } 872 if (m->m_pkthdr.len != len) { /* one of the m_copyback() calls failed */ 873 m_freem(m); 874 return (NULL); 875 } 876 rtm = mtod(m, struct rt_msghdr *); 877 bzero(rtm, hlen); 878 rtm->rtm_msglen = len; 879 rtm->rtm_version = RTM_VERSION; 880 rtm->rtm_type = type; 881 return (m); 882 } 883 884 /* 885 * This routine is called to generate a message from the routing 886 * socket indicating that a redirect has occurred, a routing lookup 887 * has failed, or that a protocol has detected timeouts to a particular 888 * destination. 889 */ 890 void 891 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error) 892 { 893 struct sockaddr *dst = rtinfo->rti_info[RTAX_DST]; 894 struct rt_msghdr *rtm; 895 struct mbuf *m; 896 897 if (route_cb.any_count == 0) 898 return; 899 m = rt_msg_mbuf(type, rtinfo); 900 if (m == NULL) 901 return; 902 rtm = mtod(m, struct rt_msghdr *); 903 rtm->rtm_flags = RTF_DONE | flags; 904 rtm->rtm_errno = error; 905 rtm->rtm_addrs = rtinfo->rti_addrs; 906 rts_input(m, familyof(dst)); 907 } 908 909 void 910 rt_dstmsg(int type, struct sockaddr *dst, int error) 911 { 912 struct rt_msghdr *rtm; 913 struct rt_addrinfo addrs; 914 struct mbuf *m; 915 916 if (route_cb.any_count == 0) 917 return; 918 bzero(&addrs, sizeof(struct rt_addrinfo)); 919 addrs.rti_info[RTAX_DST] = dst; 920 m = rt_msg_mbuf(type, &addrs); 921 if (m == NULL) 922 return; 923 rtm = mtod(m, struct rt_msghdr *); 924 rtm->rtm_flags = RTF_DONE; 925 rtm->rtm_errno = error; 926 rtm->rtm_addrs = addrs.rti_addrs; 927 rts_input(m, familyof(dst)); 928 } 929 930 /* 931 * This routine is called to generate a message from the routing 932 * socket indicating that the status of a network interface has changed. 933 */ 934 void 935 rt_ifmsg(struct ifnet *ifp) 936 { 937 struct if_msghdr *ifm; 938 struct mbuf *m; 939 struct rt_addrinfo rtinfo; 940 941 if (route_cb.any_count == 0) 942 return; 943 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 944 m = rt_msg_mbuf(RTM_IFINFO, &rtinfo); 945 if (m == NULL) 946 return; 947 ifm = mtod(m, struct if_msghdr *); 948 ifm->ifm_index = ifp->if_index; 949 ifm->ifm_flags = ifp->if_flags; 950 ifm->ifm_data = ifp->if_data; 951 ifm->ifm_addrs = 0; 952 rts_input(m, 0); 953 } 954 955 static void 956 rt_ifamsg(int cmd, struct ifaddr *ifa) 957 { 958 struct ifa_msghdr *ifam; 959 struct rt_addrinfo rtinfo; 960 struct mbuf *m; 961 struct ifnet *ifp = ifa->ifa_ifp; 962 963 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 964 rtinfo.rti_ifaaddr = ifa->ifa_addr; 965 rtinfo.rti_ifpaddr = 966 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr; 967 rtinfo.rti_netmask = ifa->ifa_netmask; 968 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr; 969 970 m = rt_msg_mbuf(cmd, &rtinfo); 971 if (m == NULL) 972 return; 973 974 ifam = mtod(m, struct ifa_msghdr *); 975 ifam->ifam_index = ifp->if_index; 976 ifam->ifam_metric = ifa->ifa_metric; 977 ifam->ifam_flags = ifa->ifa_flags; 978 ifam->ifam_addrs = rtinfo.rti_addrs; 979 980 rts_input(m, familyof(ifa->ifa_addr)); 981 } 982 983 void 984 rt_rtmsg(int cmd, struct rtentry *rt, struct ifnet *ifp, int error) 985 { 986 struct rt_msghdr *rtm; 987 struct rt_addrinfo rtinfo; 988 struct mbuf *m; 989 struct sockaddr *dst; 990 991 if (rt == NULL) 992 return; 993 994 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 995 rtinfo.rti_dst = dst = rt_key(rt); 996 rtinfo.rti_gateway = rt->rt_gateway; 997 rtinfo.rti_netmask = rt_mask(rt); 998 if (ifp != NULL) { 999 rtinfo.rti_ifpaddr = 1000 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr; 1001 } 1002 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr; 1003 1004 m = rt_msg_mbuf(cmd, &rtinfo); 1005 if (m == NULL) 1006 return; 1007 1008 rtm = mtod(m, struct rt_msghdr *); 1009 if (ifp != NULL) 1010 rtm->rtm_index = ifp->if_index; 1011 rtm->rtm_flags |= rt->rt_flags; 1012 rtm->rtm_errno = error; 1013 rtm->rtm_addrs = rtinfo.rti_addrs; 1014 1015 rts_input(m, familyof(dst)); 1016 } 1017 1018 /* 1019 * This is called to generate messages from the routing socket 1020 * indicating a network interface has had addresses associated with it. 1021 * if we ever reverse the logic and replace messages TO the routing 1022 * socket indicate a request to configure interfaces, then it will 1023 * be unnecessary as the routing socket will automatically generate 1024 * copies of it. 1025 */ 1026 void 1027 rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt) 1028 { 1029 #ifdef SCTP 1030 /* 1031 * notify the SCTP stack 1032 * this will only get called when an address is added/deleted 1033 * XXX pass the ifaddr struct instead if ifa->ifa_addr... 1034 */ 1035 if (cmd == RTM_ADD) 1036 sctp_add_ip_address(ifa); 1037 else if (cmd == RTM_DELETE) 1038 sctp_delete_ip_address(ifa); 1039 #endif /* SCTP */ 1040 1041 if (route_cb.any_count == 0) 1042 return; 1043 1044 if (cmd == RTM_ADD) { 1045 rt_ifamsg(RTM_NEWADDR, ifa); 1046 rt_rtmsg(RTM_ADD, rt, ifa->ifa_ifp, error); 1047 } else { 1048 KASSERT((cmd == RTM_DELETE), ("unknown cmd %d", cmd)); 1049 rt_rtmsg(RTM_DELETE, rt, ifa->ifa_ifp, error); 1050 rt_ifamsg(RTM_DELADDR, ifa); 1051 } 1052 } 1053 1054 /* 1055 * This is the analogue to the rt_newaddrmsg which performs the same 1056 * function but for multicast group memberhips. This is easier since 1057 * there is no route state to worry about. 1058 */ 1059 void 1060 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma) 1061 { 1062 struct rt_addrinfo rtinfo; 1063 struct mbuf *m = NULL; 1064 struct ifnet *ifp = ifma->ifma_ifp; 1065 struct ifma_msghdr *ifmam; 1066 1067 if (route_cb.any_count == 0) 1068 return; 1069 1070 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1071 rtinfo.rti_ifaaddr = ifma->ifma_addr; 1072 if (ifp != NULL && !TAILQ_EMPTY(&ifp->if_addrheads[mycpuid])) { 1073 rtinfo.rti_ifpaddr = 1074 TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa->ifa_addr; 1075 } 1076 /* 1077 * If a link-layer address is present, present it as a ``gateway'' 1078 * (similarly to how ARP entries, e.g., are presented). 1079 */ 1080 rtinfo.rti_gateway = ifma->ifma_lladdr; 1081 1082 m = rt_msg_mbuf(cmd, &rtinfo); 1083 if (m == NULL) 1084 return; 1085 1086 ifmam = mtod(m, struct ifma_msghdr *); 1087 ifmam->ifmam_index = ifp->if_index; 1088 ifmam->ifmam_addrs = rtinfo.rti_addrs; 1089 1090 rts_input(m, familyof(ifma->ifma_addr)); 1091 } 1092 1093 static struct mbuf * 1094 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1095 struct rt_addrinfo *info) 1096 { 1097 struct if_announcemsghdr *ifan; 1098 struct mbuf *m; 1099 1100 if (route_cb.any_count == 0) 1101 return NULL; 1102 1103 bzero(info, sizeof(*info)); 1104 m = rt_msg_mbuf(type, info); 1105 if (m == NULL) 1106 return NULL; 1107 1108 ifan = mtod(m, struct if_announcemsghdr *); 1109 ifan->ifan_index = ifp->if_index; 1110 strlcpy(ifan->ifan_name, ifp->if_xname, sizeof ifan->ifan_name); 1111 ifan->ifan_what = what; 1112 return m; 1113 } 1114 1115 /* 1116 * This is called to generate routing socket messages indicating 1117 * IEEE80211 wireless events. 1118 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1119 */ 1120 void 1121 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len) 1122 { 1123 struct rt_addrinfo info; 1124 struct mbuf *m; 1125 1126 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1127 if (m == NULL) 1128 return; 1129 1130 /* 1131 * Append the ieee80211 data. Try to stick it in the 1132 * mbuf containing the ifannounce msg; otherwise allocate 1133 * a new mbuf and append. 1134 * 1135 * NB: we assume m is a single mbuf. 1136 */ 1137 if (data_len > M_TRAILINGSPACE(m)) { 1138 struct mbuf *n = m_get(MB_DONTWAIT, MT_DATA); 1139 if (n == NULL) { 1140 m_freem(m); 1141 return; 1142 } 1143 bcopy(data, mtod(n, void *), data_len); 1144 n->m_len = data_len; 1145 m->m_next = n; 1146 } else if (data_len > 0) { 1147 bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len); 1148 m->m_len += data_len; 1149 } 1150 mbuftrackid(m, 33); 1151 if (m->m_flags & M_PKTHDR) 1152 m->m_pkthdr.len += data_len; 1153 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len; 1154 rts_input(m, 0); 1155 } 1156 1157 /* 1158 * This is called to generate routing socket messages indicating 1159 * network interface arrival and departure. 1160 */ 1161 void 1162 rt_ifannouncemsg(struct ifnet *ifp, int what) 1163 { 1164 struct rt_addrinfo addrinfo; 1165 struct mbuf *m; 1166 1167 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &addrinfo); 1168 if (m != NULL) 1169 rts_input(m, 0); 1170 } 1171 1172 static int 1173 resizewalkarg(struct walkarg *w, int len) 1174 { 1175 void *newptr; 1176 1177 newptr = kmalloc(len, M_RTABLE, M_INTWAIT | M_NULLOK); 1178 if (newptr == NULL) 1179 return (ENOMEM); 1180 if (w->w_tmem != NULL) 1181 kfree(w->w_tmem, M_RTABLE); 1182 w->w_tmem = newptr; 1183 w->w_tmemsize = len; 1184 return (0); 1185 } 1186 1187 /* 1188 * This is used in dumping the kernel table via sysctl(). 1189 */ 1190 int 1191 sysctl_dumpentry(struct radix_node *rn, void *vw) 1192 { 1193 struct walkarg *w = vw; 1194 struct rtentry *rt = (struct rtentry *)rn; 1195 struct rt_addrinfo rtinfo; 1196 int error, msglen; 1197 1198 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1199 return 0; 1200 1201 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1202 rtinfo.rti_dst = rt_key(rt); 1203 rtinfo.rti_gateway = rt->rt_gateway; 1204 rtinfo.rti_netmask = rt_mask(rt); 1205 rtinfo.rti_genmask = rt->rt_genmask; 1206 if (rt->rt_ifp != NULL) { 1207 rtinfo.rti_ifpaddr = 1208 TAILQ_FIRST(&rt->rt_ifp->if_addrheads[mycpuid])->ifa->ifa_addr; 1209 rtinfo.rti_ifaaddr = rt->rt_ifa->ifa_addr; 1210 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1211 rtinfo.rti_bcastaddr = rt->rt_ifa->ifa_dstaddr; 1212 } 1213 msglen = rt_msgsize(RTM_GET, &rtinfo); 1214 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0) 1215 return (ENOMEM); 1216 rt_msg_buffer(RTM_GET, &rtinfo, w->w_tmem, msglen); 1217 if (w->w_req != NULL) { 1218 struct rt_msghdr *rtm = w->w_tmem; 1219 1220 rtm->rtm_flags = rt->rt_flags; 1221 rtm->rtm_use = rt->rt_use; 1222 rtm->rtm_rmx = rt->rt_rmx; 1223 rtm->rtm_index = rt->rt_ifp->if_index; 1224 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1225 rtm->rtm_addrs = rtinfo.rti_addrs; 1226 error = SYSCTL_OUT(w->w_req, rtm, msglen); 1227 return (error); 1228 } 1229 return (0); 1230 } 1231 1232 static int 1233 sysctl_iflist(int af, struct walkarg *w) 1234 { 1235 struct ifnet *ifp; 1236 struct rt_addrinfo rtinfo; 1237 int msglen, error; 1238 1239 bzero(&rtinfo, sizeof(struct rt_addrinfo)); 1240 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1241 struct ifaddr_container *ifac; 1242 struct ifaddr *ifa; 1243 1244 if (w->w_arg && w->w_arg != ifp->if_index) 1245 continue; 1246 ifac = TAILQ_FIRST(&ifp->if_addrheads[mycpuid]); 1247 ifa = ifac->ifa; 1248 rtinfo.rti_ifpaddr = ifa->ifa_addr; 1249 msglen = rt_msgsize(RTM_IFINFO, &rtinfo); 1250 if (w->w_tmemsize < msglen && resizewalkarg(w, msglen) != 0) 1251 return (ENOMEM); 1252 rt_msg_buffer(RTM_IFINFO, &rtinfo, w->w_tmem, msglen); 1253 rtinfo.rti_ifpaddr = NULL; 1254 if (w->w_req != NULL && w->w_tmem != NULL) { 1255 struct if_msghdr *ifm = w->w_tmem; 1256 1257 ifm->ifm_index = ifp->if_index; 1258 ifm->ifm_flags = ifp->if_flags; 1259 ifm->ifm_data = ifp->if_data; 1260 ifm->ifm_addrs = rtinfo.rti_addrs; 1261 error = SYSCTL_OUT(w->w_req, ifm, msglen); 1262 if (error) 1263 return (error); 1264 } 1265 while ((ifac = TAILQ_NEXT(ifac, ifa_link)) != NULL) { 1266 ifa = ifac->ifa; 1267 1268 if (af && af != ifa->ifa_addr->sa_family) 1269 continue; 1270 if (curproc->p_ucred->cr_prison && 1271 prison_if(curproc->p_ucred, ifa->ifa_addr)) 1272 continue; 1273 rtinfo.rti_ifaaddr = ifa->ifa_addr; 1274 rtinfo.rti_netmask = ifa->ifa_netmask; 1275 rtinfo.rti_bcastaddr = ifa->ifa_dstaddr; 1276 msglen = rt_msgsize(RTM_NEWADDR, &rtinfo); 1277 if (w->w_tmemsize < msglen && 1278 resizewalkarg(w, msglen) != 0) 1279 return (ENOMEM); 1280 rt_msg_buffer(RTM_NEWADDR, &rtinfo, w->w_tmem, msglen); 1281 if (w->w_req != NULL) { 1282 struct ifa_msghdr *ifam = w->w_tmem; 1283 1284 ifam->ifam_index = ifa->ifa_ifp->if_index; 1285 ifam->ifam_flags = ifa->ifa_flags; 1286 ifam->ifam_metric = ifa->ifa_metric; 1287 ifam->ifam_addrs = rtinfo.rti_addrs; 1288 error = SYSCTL_OUT(w->w_req, w->w_tmem, msglen); 1289 if (error) 1290 return (error); 1291 } 1292 } 1293 rtinfo.rti_netmask = NULL; 1294 rtinfo.rti_ifaaddr = NULL; 1295 rtinfo.rti_bcastaddr = NULL; 1296 } 1297 return (0); 1298 } 1299 1300 static int 1301 sysctl_rtsock(SYSCTL_HANDLER_ARGS) 1302 { 1303 int *name = (int *)arg1; 1304 u_int namelen = arg2; 1305 struct radix_node_head *rnh; 1306 int i, error = EINVAL; 1307 int origcpu; 1308 u_char af; 1309 struct walkarg w; 1310 1311 name ++; 1312 namelen--; 1313 if (req->newptr) 1314 return (EPERM); 1315 if (namelen != 3 && namelen != 4) 1316 return (EINVAL); 1317 af = name[0]; 1318 bzero(&w, sizeof w); 1319 w.w_op = name[1]; 1320 w.w_arg = name[2]; 1321 w.w_req = req; 1322 1323 /* 1324 * Optional third argument specifies cpu, used primarily for 1325 * debugging the route table. 1326 */ 1327 if (namelen == 4) { 1328 if (name[3] < 0 || name[3] >= ncpus) 1329 return (EINVAL); 1330 origcpu = mycpuid; 1331 lwkt_migratecpu(name[3]); 1332 } else { 1333 origcpu = -1; 1334 } 1335 crit_enter(); 1336 switch (w.w_op) { 1337 case NET_RT_DUMP: 1338 case NET_RT_FLAGS: 1339 for (i = 1; i <= AF_MAX; i++) 1340 if ((rnh = rt_tables[mycpuid][i]) && 1341 (af == 0 || af == i) && 1342 (error = rnh->rnh_walktree(rnh, 1343 sysctl_dumpentry, &w))) 1344 break; 1345 break; 1346 1347 case NET_RT_IFLIST: 1348 error = sysctl_iflist(af, &w); 1349 } 1350 crit_exit(); 1351 if (w.w_tmem != NULL) 1352 kfree(w.w_tmem, M_RTABLE); 1353 if (origcpu >= 0) 1354 lwkt_migratecpu(origcpu); 1355 return (error); 1356 } 1357 1358 SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, ""); 1359 1360 /* 1361 * Definitions of protocols supported in the ROUTE domain. 1362 */ 1363 1364 static struct domain routedomain; /* or at least forward */ 1365 1366 static struct protosw routesw[] = { 1367 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 1368 0, route_output, raw_ctlinput, 0, 1369 cpu0_soport, 1370 raw_init, 0, 0, 0, 1371 &route_usrreqs 1372 } 1373 }; 1374 1375 static struct domain routedomain = { 1376 PF_ROUTE, "route", NULL, NULL, NULL, 1377 routesw, &routesw[(sizeof routesw)/(sizeof routesw[0])], 1378 }; 1379 1380 DOMAIN_SET(route); 1381 1382