1 /*- 2 * Copyright (c) 1988, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)rtsock.c 8.7 (Berkeley) 10/12/95 30 * $FreeBSD$ 31 */ 32 #include "opt_sctp.h" 33 #include "opt_mpath.h" 34 35 #include <sys/param.h> 36 #include <sys/domain.h> 37 #include <sys/kernel.h> 38 #include <sys/jail.h> 39 #include <sys/malloc.h> 40 #include <sys/mbuf.h> 41 #include <sys/priv.h> 42 #include <sys/proc.h> 43 #include <sys/protosw.h> 44 #include <sys/signalvar.h> 45 #include <sys/socket.h> 46 #include <sys/socketvar.h> 47 #include <sys/sysctl.h> 48 #include <sys/systm.h> 49 50 #include <net/if.h> 51 #include <net/netisr.h> 52 #include <net/raw_cb.h> 53 #include <net/route.h> 54 55 #include <netinet/in.h> 56 57 #ifdef SCTP 58 extern void sctp_addr_change(struct ifaddr *ifa, int cmd); 59 #endif /* SCTP */ 60 61 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables"); 62 63 /* NB: these are not modified */ 64 static struct sockaddr route_dst = { 2, PF_ROUTE, }; 65 static struct sockaddr route_src = { 2, PF_ROUTE, }; 66 static struct sockaddr sa_zero = { sizeof(sa_zero), AF_INET, }; 67 68 static struct { 69 int ip_count; /* attached w/ AF_INET */ 70 int ip6_count; /* attached w/ AF_INET6 */ 71 int ipx_count; /* attached w/ AF_IPX */ 72 int any_count; /* total attached */ 73 } route_cb; 74 75 struct mtx rtsock_mtx; 76 MTX_SYSINIT(rtsock, &rtsock_mtx, "rtsock route_cb lock", MTX_DEF); 77 78 #define RTSOCK_LOCK() mtx_lock(&rtsock_mtx) 79 #define RTSOCK_UNLOCK() mtx_unlock(&rtsock_mtx) 80 #define RTSOCK_LOCK_ASSERT() mtx_assert(&rtsock_mtx, MA_OWNED) 81 82 static struct ifqueue rtsintrq; 83 84 SYSCTL_NODE(_net, OID_AUTO, route, CTLFLAG_RD, 0, ""); 85 SYSCTL_INT(_net_route, OID_AUTO, netisr_maxqlen, CTLFLAG_RW, 86 &rtsintrq.ifq_maxlen, 0, "maximum routing socket dispatch queue length"); 87 88 struct walkarg { 89 int w_tmemsize; 90 int w_op, w_arg; 91 caddr_t w_tmem; 92 struct sysctl_req *w_req; 93 }; 94 95 static void rts_input(struct mbuf *m); 96 static struct mbuf *rt_msg1(int type, struct rt_addrinfo *rtinfo); 97 static int rt_msg2(int type, struct rt_addrinfo *rtinfo, 98 caddr_t cp, struct walkarg *w); 99 static int rt_xaddrs(caddr_t cp, caddr_t cplim, 100 struct rt_addrinfo *rtinfo); 101 static int sysctl_dumpentry(struct radix_node *rn, void *vw); 102 static int sysctl_iflist(int af, struct walkarg *w); 103 static int sysctl_ifmalist(int af, struct walkarg *w); 104 static int route_output(struct mbuf *m, struct socket *so); 105 static void rt_setmetrics(u_long which, const struct rt_metrics *in, 106 struct rt_metrics_lite *out); 107 static void rt_getmetrics(const struct rt_metrics_lite *in, 108 struct rt_metrics *out); 109 static void rt_dispatch(struct mbuf *, const struct sockaddr *); 110 111 static void 112 rts_init(void) 113 { 114 int tmp; 115 116 rtsintrq.ifq_maxlen = 256; 117 if (TUNABLE_INT_FETCH("net.route.netisr_maxqlen", &tmp)) 118 rtsintrq.ifq_maxlen = tmp; 119 mtx_init(&rtsintrq.ifq_mtx, "rts_inq", NULL, MTX_DEF); 120 netisr_register(NETISR_ROUTE, rts_input, &rtsintrq, NETISR_MPSAFE); 121 } 122 SYSINIT(rtsock, SI_SUB_PROTO_DOMAIN, SI_ORDER_THIRD, rts_init, 0); 123 124 static void 125 rts_input(struct mbuf *m) 126 { 127 struct sockproto route_proto; 128 unsigned short *family; 129 struct m_tag *tag; 130 131 route_proto.sp_family = PF_ROUTE; 132 tag = m_tag_find(m, PACKET_TAG_RTSOCKFAM, NULL); 133 if (tag != NULL) { 134 family = (unsigned short *)(tag + 1); 135 route_proto.sp_protocol = *family; 136 m_tag_delete(m, tag); 137 } else 138 route_proto.sp_protocol = 0; 139 140 raw_input(m, &route_proto, &route_src, &route_dst); 141 } 142 143 /* 144 * It really doesn't make any sense at all for this code to share much 145 * with raw_usrreq.c, since its functionality is so restricted. XXX 146 */ 147 static void 148 rts_abort(struct socket *so) 149 { 150 151 raw_usrreqs.pru_abort(so); 152 } 153 154 static void 155 rts_close(struct socket *so) 156 { 157 158 raw_usrreqs.pru_close(so); 159 } 160 161 /* pru_accept is EOPNOTSUPP */ 162 163 static int 164 rts_attach(struct socket *so, int proto, struct thread *td) 165 { 166 struct rawcb *rp; 167 int s, error; 168 169 KASSERT(so->so_pcb == NULL, ("rts_attach: so_pcb != NULL")); 170 171 /* XXX */ 172 MALLOC(rp, struct rawcb *, sizeof *rp, M_PCB, M_WAITOK | M_ZERO); 173 if (rp == NULL) 174 return ENOBUFS; 175 176 /* 177 * The splnet() is necessary to block protocols from sending 178 * error notifications (like RTM_REDIRECT or RTM_LOSING) while 179 * this PCB is extant but incompletely initialized. 180 * Probably we should try to do more of this work beforehand and 181 * eliminate the spl. 182 */ 183 s = splnet(); 184 so->so_pcb = (caddr_t)rp; 185 error = raw_attach(so, proto); 186 rp = sotorawcb(so); 187 if (error) { 188 splx(s); 189 so->so_pcb = NULL; 190 free(rp, M_PCB); 191 return error; 192 } 193 RTSOCK_LOCK(); 194 switch(rp->rcb_proto.sp_protocol) { 195 case AF_INET: 196 route_cb.ip_count++; 197 break; 198 case AF_INET6: 199 route_cb.ip6_count++; 200 break; 201 case AF_IPX: 202 route_cb.ipx_count++; 203 break; 204 } 205 rp->rcb_faddr = &route_src; 206 route_cb.any_count++; 207 RTSOCK_UNLOCK(); 208 soisconnected(so); 209 so->so_options |= SO_USELOOPBACK; 210 splx(s); 211 return 0; 212 } 213 214 static int 215 rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 216 { 217 218 return (raw_usrreqs.pru_bind(so, nam, td)); /* xxx just EINVAL */ 219 } 220 221 static int 222 rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 223 { 224 225 return (raw_usrreqs.pru_connect(so, nam, td)); /* XXX just EINVAL */ 226 } 227 228 /* pru_connect2 is EOPNOTSUPP */ 229 /* pru_control is EOPNOTSUPP */ 230 231 static void 232 rts_detach(struct socket *so) 233 { 234 struct rawcb *rp = sotorawcb(so); 235 236 KASSERT(rp != NULL, ("rts_detach: rp == NULL")); 237 238 RTSOCK_LOCK(); 239 switch(rp->rcb_proto.sp_protocol) { 240 case AF_INET: 241 route_cb.ip_count--; 242 break; 243 case AF_INET6: 244 route_cb.ip6_count--; 245 break; 246 case AF_IPX: 247 route_cb.ipx_count--; 248 break; 249 } 250 route_cb.any_count--; 251 RTSOCK_UNLOCK(); 252 raw_usrreqs.pru_detach(so); 253 } 254 255 static int 256 rts_disconnect(struct socket *so) 257 { 258 259 return (raw_usrreqs.pru_disconnect(so)); 260 } 261 262 /* pru_listen is EOPNOTSUPP */ 263 264 static int 265 rts_peeraddr(struct socket *so, struct sockaddr **nam) 266 { 267 268 return (raw_usrreqs.pru_peeraddr(so, nam)); 269 } 270 271 /* pru_rcvd is EOPNOTSUPP */ 272 /* pru_rcvoob is EOPNOTSUPP */ 273 274 static int 275 rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 276 struct mbuf *control, struct thread *td) 277 { 278 279 return (raw_usrreqs.pru_send(so, flags, m, nam, control, td)); 280 } 281 282 /* pru_sense is null */ 283 284 static int 285 rts_shutdown(struct socket *so) 286 { 287 288 return (raw_usrreqs.pru_shutdown(so)); 289 } 290 291 static int 292 rts_sockaddr(struct socket *so, struct sockaddr **nam) 293 { 294 295 return (raw_usrreqs.pru_sockaddr(so, nam)); 296 } 297 298 static struct pr_usrreqs route_usrreqs = { 299 .pru_abort = rts_abort, 300 .pru_attach = rts_attach, 301 .pru_bind = rts_bind, 302 .pru_connect = rts_connect, 303 .pru_detach = rts_detach, 304 .pru_disconnect = rts_disconnect, 305 .pru_peeraddr = rts_peeraddr, 306 .pru_send = rts_send, 307 .pru_shutdown = rts_shutdown, 308 .pru_sockaddr = rts_sockaddr, 309 .pru_close = rts_close, 310 }; 311 312 /*ARGSUSED*/ 313 static int 314 route_output(struct mbuf *m, struct socket *so) 315 { 316 #define sa_equal(a1, a2) (bcmp((a1), (a2), (a1)->sa_len) == 0) 317 struct rt_msghdr *rtm = NULL; 318 struct rtentry *rt = NULL; 319 struct radix_node_head *rnh; 320 struct rt_addrinfo info; 321 int len, error = 0; 322 struct ifnet *ifp = NULL; 323 struct sockaddr_in jail; 324 325 #define senderr(e) { error = e; goto flush;} 326 if (m == NULL || ((m->m_len < sizeof(long)) && 327 (m = m_pullup(m, sizeof(long))) == NULL)) 328 return (ENOBUFS); 329 if ((m->m_flags & M_PKTHDR) == 0) 330 panic("route_output"); 331 len = m->m_pkthdr.len; 332 if (len < sizeof(*rtm) || 333 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 334 info.rti_info[RTAX_DST] = NULL; 335 senderr(EINVAL); 336 } 337 R_Malloc(rtm, struct rt_msghdr *, len); 338 if (rtm == NULL) { 339 info.rti_info[RTAX_DST] = NULL; 340 senderr(ENOBUFS); 341 } 342 m_copydata(m, 0, len, (caddr_t)rtm); 343 if (rtm->rtm_version != RTM_VERSION) { 344 info.rti_info[RTAX_DST] = NULL; 345 senderr(EPROTONOSUPPORT); 346 } 347 rtm->rtm_pid = curproc->p_pid; 348 bzero(&info, sizeof(info)); 349 info.rti_addrs = rtm->rtm_addrs; 350 if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) { 351 info.rti_info[RTAX_DST] = NULL; 352 senderr(EINVAL); 353 } 354 info.rti_flags = rtm->rtm_flags; 355 if (info.rti_info[RTAX_DST] == NULL || 356 info.rti_info[RTAX_DST]->sa_family >= AF_MAX || 357 (info.rti_info[RTAX_GATEWAY] != NULL && 358 info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) 359 senderr(EINVAL); 360 if (info.rti_info[RTAX_GENMASK]) { 361 struct radix_node *t; 362 t = rn_addmask((caddr_t) info.rti_info[RTAX_GENMASK], 0, 1); 363 if (t != NULL && 364 bcmp((char *)(void *)info.rti_info[RTAX_GENMASK] + 1, 365 (char *)(void *)t->rn_key + 1, 366 ((struct sockaddr *)t->rn_key)->sa_len - 1) == 0) 367 info.rti_info[RTAX_GENMASK] = 368 (struct sockaddr *)t->rn_key; 369 else 370 senderr(ENOBUFS); 371 } 372 373 /* 374 * Verify that the caller has the appropriate privilege; RTM_GET 375 * is the only operation the non-superuser is allowed. 376 */ 377 if (rtm->rtm_type != RTM_GET) { 378 error = priv_check(curthread, PRIV_NET_ROUTE); 379 if (error) 380 senderr(error); 381 } 382 383 switch (rtm->rtm_type) { 384 struct rtentry *saved_nrt; 385 386 case RTM_ADD: 387 if (info.rti_info[RTAX_GATEWAY] == NULL) 388 senderr(EINVAL); 389 saved_nrt = NULL; 390 error = rtrequest1(RTM_ADD, &info, &saved_nrt); 391 if (error == 0 && saved_nrt) { 392 RT_LOCK(saved_nrt); 393 rt_setmetrics(rtm->rtm_inits, 394 &rtm->rtm_rmx, &saved_nrt->rt_rmx); 395 rtm->rtm_index = saved_nrt->rt_ifp->if_index; 396 RT_REMREF(saved_nrt); 397 saved_nrt->rt_genmask = info.rti_info[RTAX_GENMASK]; 398 RT_UNLOCK(saved_nrt); 399 } 400 break; 401 402 case RTM_DELETE: 403 saved_nrt = NULL; 404 error = rtrequest1(RTM_DELETE, &info, &saved_nrt); 405 if (error == 0) { 406 RT_LOCK(saved_nrt); 407 rt = saved_nrt; 408 goto report; 409 } 410 break; 411 412 case RTM_GET: 413 case RTM_CHANGE: 414 case RTM_LOCK: 415 rnh = rt_tables[info.rti_info[RTAX_DST]->sa_family]; 416 if (rnh == NULL) 417 senderr(EAFNOSUPPORT); 418 RADIX_NODE_HEAD_LOCK(rnh); 419 rt = (struct rtentry *) rnh->rnh_lookup(info.rti_info[RTAX_DST], 420 info.rti_info[RTAX_NETMASK], rnh); 421 if (rt == NULL) { /* XXX looks bogus */ 422 RADIX_NODE_HEAD_UNLOCK(rnh); 423 senderr(ESRCH); 424 } 425 #ifdef RADIX_MPATH 426 /* 427 * for RTM_CHANGE/LOCK, if we got multipath routes, 428 * we require users to specify a matching RTAX_GATEWAY. 429 * 430 * for RTM_GET, gate is optional even with multipath. 431 * if gate == NULL the first match is returned. 432 * (no need to call rt_mpath_matchgate if gate == NULL) 433 */ 434 if (rn_mpath_capable(rnh) && 435 (rtm->rtm_type != RTM_GET || info.rti_info[RTAX_GATEWAY])) { 436 rt = rt_mpath_matchgate(rt, info.rti_info[RTAX_GATEWAY]); 437 if (!rt) { 438 RADIX_NODE_HEAD_UNLOCK(rnh); 439 senderr(ESRCH); 440 } 441 } 442 #endif 443 RT_LOCK(rt); 444 RT_ADDREF(rt); 445 RADIX_NODE_HEAD_UNLOCK(rnh); 446 447 /* 448 * Fix for PR: 82974 449 * 450 * RTM_CHANGE/LOCK need a perfect match, rn_lookup() 451 * returns a perfect match in case a netmask is 452 * specified. For host routes only a longest prefix 453 * match is returned so it is necessary to compare the 454 * existence of the netmask. If both have a netmask 455 * rnh_lookup() did a perfect match and if none of them 456 * have a netmask both are host routes which is also a 457 * perfect match. 458 */ 459 460 if (rtm->rtm_type != RTM_GET && 461 (!rt_mask(rt) != !info.rti_info[RTAX_NETMASK])) { 462 RT_UNLOCK(rt); 463 senderr(ESRCH); 464 } 465 466 switch(rtm->rtm_type) { 467 468 case RTM_GET: 469 report: 470 RT_LOCK_ASSERT(rt); 471 info.rti_info[RTAX_DST] = rt_key(rt); 472 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 473 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 474 info.rti_info[RTAX_GENMASK] = rt->rt_genmask; 475 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 476 ifp = rt->rt_ifp; 477 if (ifp) { 478 info.rti_info[RTAX_IFP] = 479 ifp->if_addr->ifa_addr; 480 if (jailed(so->so_cred)) { 481 bzero(&jail, sizeof(jail)); 482 jail.sin_family = PF_INET; 483 jail.sin_len = sizeof(jail); 484 jail.sin_addr.s_addr = 485 htonl(prison_getip(so->so_cred)); 486 info.rti_info[RTAX_IFA] = 487 (struct sockaddr *)&jail; 488 } else 489 info.rti_info[RTAX_IFA] = 490 rt->rt_ifa->ifa_addr; 491 if (ifp->if_flags & IFF_POINTOPOINT) 492 info.rti_info[RTAX_BRD] = 493 rt->rt_ifa->ifa_dstaddr; 494 rtm->rtm_index = ifp->if_index; 495 } else { 496 info.rti_info[RTAX_IFP] = NULL; 497 info.rti_info[RTAX_IFA] = NULL; 498 } 499 } else if ((ifp = rt->rt_ifp) != NULL) { 500 rtm->rtm_index = ifp->if_index; 501 } 502 len = rt_msg2(rtm->rtm_type, &info, NULL, NULL); 503 if (len > rtm->rtm_msglen) { 504 struct rt_msghdr *new_rtm; 505 R_Malloc(new_rtm, struct rt_msghdr *, len); 506 if (new_rtm == NULL) { 507 RT_UNLOCK(rt); 508 senderr(ENOBUFS); 509 } 510 bcopy(rtm, new_rtm, rtm->rtm_msglen); 511 Free(rtm); rtm = new_rtm; 512 } 513 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, NULL); 514 rtm->rtm_flags = rt->rt_flags; 515 rtm->rtm_use = 0; 516 rt_getmetrics(&rt->rt_rmx, &rtm->rtm_rmx); 517 rtm->rtm_addrs = info.rti_addrs; 518 break; 519 520 case RTM_CHANGE: 521 /* 522 * New gateway could require new ifaddr, ifp; 523 * flags may also be different; ifp may be specified 524 * by ll sockaddr when protocol address is ambiguous 525 */ 526 if (((rt->rt_flags & RTF_GATEWAY) && 527 info.rti_info[RTAX_GATEWAY] != NULL) || 528 info.rti_info[RTAX_IFP] != NULL || 529 (info.rti_info[RTAX_IFA] != NULL && 530 !sa_equal(info.rti_info[RTAX_IFA], 531 rt->rt_ifa->ifa_addr))) { 532 RT_UNLOCK(rt); 533 if ((error = rt_getifa(&info)) != 0) 534 senderr(error); 535 RT_LOCK(rt); 536 } 537 if (info.rti_ifa != NULL && 538 info.rti_ifa != rt->rt_ifa && 539 rt->rt_ifa != NULL && 540 rt->rt_ifa->ifa_rtrequest != NULL) { 541 rt->rt_ifa->ifa_rtrequest(RTM_DELETE, rt, 542 &info); 543 IFAFREE(rt->rt_ifa); 544 } 545 if (info.rti_info[RTAX_GATEWAY] != NULL) { 546 if ((error = rt_setgate(rt, rt_key(rt), 547 info.rti_info[RTAX_GATEWAY])) != 0) { 548 RT_UNLOCK(rt); 549 senderr(error); 550 } 551 if (!(rt->rt_flags & RTF_LLINFO)) 552 rt->rt_flags |= RTF_GATEWAY; 553 } 554 if (info.rti_ifa != NULL && 555 info.rti_ifa != rt->rt_ifa) { 556 IFAREF(info.rti_ifa); 557 rt->rt_ifa = info.rti_ifa; 558 rt->rt_ifp = info.rti_ifp; 559 } 560 /* Allow some flags to be toggled on change. */ 561 if (rtm->rtm_fmask & RTF_FMASK) 562 rt->rt_flags = (rt->rt_flags & 563 ~rtm->rtm_fmask) | 564 (rtm->rtm_flags & rtm->rtm_fmask); 565 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 566 &rt->rt_rmx); 567 rtm->rtm_index = rt->rt_ifp->if_index; 568 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 569 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info); 570 if (info.rti_info[RTAX_GENMASK]) 571 rt->rt_genmask = info.rti_info[RTAX_GENMASK]; 572 /* FALLTHROUGH */ 573 case RTM_LOCK: 574 /* We don't support locks anymore */ 575 break; 576 } 577 RT_UNLOCK(rt); 578 break; 579 580 default: 581 senderr(EOPNOTSUPP); 582 } 583 584 flush: 585 if (rtm) { 586 if (error) 587 rtm->rtm_errno = error; 588 else 589 rtm->rtm_flags |= RTF_DONE; 590 } 591 if (rt) /* XXX can this be true? */ 592 RTFREE(rt); 593 { 594 struct rawcb *rp = NULL; 595 /* 596 * Check to see if we don't want our own messages. 597 */ 598 if ((so->so_options & SO_USELOOPBACK) == 0) { 599 if (route_cb.any_count <= 1) { 600 if (rtm) 601 Free(rtm); 602 m_freem(m); 603 return (error); 604 } 605 /* There is another listener, so construct message */ 606 rp = sotorawcb(so); 607 } 608 if (rtm) { 609 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 610 if (m->m_pkthdr.len < rtm->rtm_msglen) { 611 m_freem(m); 612 m = NULL; 613 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 614 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 615 Free(rtm); 616 } 617 if (m) { 618 if (rp) { 619 /* 620 * XXX insure we don't get a copy by 621 * invalidating our protocol 622 */ 623 unsigned short family = rp->rcb_proto.sp_family; 624 rp->rcb_proto.sp_family = 0; 625 rt_dispatch(m, info.rti_info[RTAX_DST]); 626 rp->rcb_proto.sp_family = family; 627 } else 628 rt_dispatch(m, info.rti_info[RTAX_DST]); 629 } 630 } 631 return (error); 632 #undef sa_equal 633 } 634 635 static void 636 rt_setmetrics(u_long which, const struct rt_metrics *in, 637 struct rt_metrics_lite *out) 638 { 639 #define metric(f, e) if (which & (f)) out->e = in->e; 640 /* 641 * Only these are stored in the routing entry since introduction 642 * of tcp hostcache. The rest is ignored. 643 */ 644 metric(RTV_MTU, rmx_mtu); 645 /* Userland -> kernel timebase conversion. */ 646 if (which & RTV_EXPIRE) 647 out->rmx_expire = in->rmx_expire ? 648 in->rmx_expire - time_second + time_uptime : 0; 649 #undef metric 650 } 651 652 static void 653 rt_getmetrics(const struct rt_metrics_lite *in, struct rt_metrics *out) 654 { 655 #define metric(e) out->e = in->e; 656 bzero(out, sizeof(*out)); 657 metric(rmx_mtu); 658 /* Kernel -> userland timebase conversion. */ 659 out->rmx_expire = in->rmx_expire ? 660 in->rmx_expire - time_uptime + time_second : 0; 661 #undef metric 662 } 663 664 /* 665 * Extract the addresses of the passed sockaddrs. 666 * Do a little sanity checking so as to avoid bad memory references. 667 * This data is derived straight from userland. 668 */ 669 static int 670 rt_xaddrs(caddr_t cp, caddr_t cplim, struct rt_addrinfo *rtinfo) 671 { 672 struct sockaddr *sa; 673 int i; 674 675 for (i = 0; i < RTAX_MAX && cp < cplim; i++) { 676 if ((rtinfo->rti_addrs & (1 << i)) == 0) 677 continue; 678 sa = (struct sockaddr *)cp; 679 /* 680 * It won't fit. 681 */ 682 if (cp + sa->sa_len > cplim) 683 return (EINVAL); 684 /* 685 * there are no more.. quit now 686 * If there are more bits, they are in error. 687 * I've seen this. route(1) can evidently generate these. 688 * This causes kernel to core dump. 689 * for compatibility, If we see this, point to a safe address. 690 */ 691 if (sa->sa_len == 0) { 692 rtinfo->rti_info[i] = &sa_zero; 693 return (0); /* should be EINVAL but for compat */ 694 } 695 /* accept it */ 696 rtinfo->rti_info[i] = sa; 697 cp += SA_SIZE(sa); 698 } 699 return (0); 700 } 701 702 static struct mbuf * 703 rt_msg1(int type, struct rt_addrinfo *rtinfo) 704 { 705 struct rt_msghdr *rtm; 706 struct mbuf *m; 707 int i; 708 struct sockaddr *sa; 709 int len, dlen; 710 711 switch (type) { 712 713 case RTM_DELADDR: 714 case RTM_NEWADDR: 715 len = sizeof(struct ifa_msghdr); 716 break; 717 718 case RTM_DELMADDR: 719 case RTM_NEWMADDR: 720 len = sizeof(struct ifma_msghdr); 721 break; 722 723 case RTM_IFINFO: 724 len = sizeof(struct if_msghdr); 725 break; 726 727 case RTM_IFANNOUNCE: 728 case RTM_IEEE80211: 729 len = sizeof(struct if_announcemsghdr); 730 break; 731 732 default: 733 len = sizeof(struct rt_msghdr); 734 } 735 if (len > MCLBYTES) 736 panic("rt_msg1"); 737 m = m_gethdr(M_DONTWAIT, MT_DATA); 738 if (m && len > MHLEN) { 739 MCLGET(m, M_DONTWAIT); 740 if ((m->m_flags & M_EXT) == 0) { 741 m_free(m); 742 m = NULL; 743 } 744 } 745 if (m == NULL) 746 return (m); 747 m->m_pkthdr.len = m->m_len = len; 748 m->m_pkthdr.rcvif = NULL; 749 rtm = mtod(m, struct rt_msghdr *); 750 bzero((caddr_t)rtm, len); 751 for (i = 0; i < RTAX_MAX; i++) { 752 if ((sa = rtinfo->rti_info[i]) == NULL) 753 continue; 754 rtinfo->rti_addrs |= (1 << i); 755 dlen = SA_SIZE(sa); 756 m_copyback(m, len, dlen, (caddr_t)sa); 757 len += dlen; 758 } 759 if (m->m_pkthdr.len != len) { 760 m_freem(m); 761 return (NULL); 762 } 763 rtm->rtm_msglen = len; 764 rtm->rtm_version = RTM_VERSION; 765 rtm->rtm_type = type; 766 return (m); 767 } 768 769 static int 770 rt_msg2(int type, struct rt_addrinfo *rtinfo, caddr_t cp, struct walkarg *w) 771 { 772 int i; 773 int len, dlen, second_time = 0; 774 caddr_t cp0; 775 776 rtinfo->rti_addrs = 0; 777 again: 778 switch (type) { 779 780 case RTM_DELADDR: 781 case RTM_NEWADDR: 782 len = sizeof(struct ifa_msghdr); 783 break; 784 785 case RTM_IFINFO: 786 len = sizeof(struct if_msghdr); 787 break; 788 789 case RTM_NEWMADDR: 790 len = sizeof(struct ifma_msghdr); 791 break; 792 793 default: 794 len = sizeof(struct rt_msghdr); 795 } 796 cp0 = cp; 797 if (cp0) 798 cp += len; 799 for (i = 0; i < RTAX_MAX; i++) { 800 struct sockaddr *sa; 801 802 if ((sa = rtinfo->rti_info[i]) == NULL) 803 continue; 804 rtinfo->rti_addrs |= (1 << i); 805 dlen = SA_SIZE(sa); 806 if (cp) { 807 bcopy((caddr_t)sa, cp, (unsigned)dlen); 808 cp += dlen; 809 } 810 len += dlen; 811 } 812 len = ALIGN(len); 813 if (cp == NULL && w != NULL && !second_time) { 814 struct walkarg *rw = w; 815 816 if (rw->w_req) { 817 if (rw->w_tmemsize < len) { 818 if (rw->w_tmem) 819 free(rw->w_tmem, M_RTABLE); 820 rw->w_tmem = (caddr_t) 821 malloc(len, M_RTABLE, M_NOWAIT); 822 if (rw->w_tmem) 823 rw->w_tmemsize = len; 824 } 825 if (rw->w_tmem) { 826 cp = rw->w_tmem; 827 second_time = 1; 828 goto again; 829 } 830 } 831 } 832 if (cp) { 833 struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 834 835 rtm->rtm_version = RTM_VERSION; 836 rtm->rtm_type = type; 837 rtm->rtm_msglen = len; 838 } 839 return (len); 840 } 841 842 /* 843 * This routine is called to generate a message from the routing 844 * socket indicating that a redirect has occured, a routing lookup 845 * has failed, or that a protocol has detected timeouts to a particular 846 * destination. 847 */ 848 void 849 rt_missmsg(int type, struct rt_addrinfo *rtinfo, int flags, int error) 850 { 851 struct rt_msghdr *rtm; 852 struct mbuf *m; 853 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 854 855 if (route_cb.any_count == 0) 856 return; 857 m = rt_msg1(type, rtinfo); 858 if (m == NULL) 859 return; 860 rtm = mtod(m, struct rt_msghdr *); 861 rtm->rtm_flags = RTF_DONE | flags; 862 rtm->rtm_errno = error; 863 rtm->rtm_addrs = rtinfo->rti_addrs; 864 rt_dispatch(m, sa); 865 } 866 867 /* 868 * This routine is called to generate a message from the routing 869 * socket indicating that the status of a network interface has changed. 870 */ 871 void 872 rt_ifmsg(struct ifnet *ifp) 873 { 874 struct if_msghdr *ifm; 875 struct mbuf *m; 876 struct rt_addrinfo info; 877 878 if (route_cb.any_count == 0) 879 return; 880 bzero((caddr_t)&info, sizeof(info)); 881 m = rt_msg1(RTM_IFINFO, &info); 882 if (m == NULL) 883 return; 884 ifm = mtod(m, struct if_msghdr *); 885 ifm->ifm_index = ifp->if_index; 886 ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags; 887 ifm->ifm_data = ifp->if_data; 888 ifm->ifm_addrs = 0; 889 rt_dispatch(m, NULL); 890 } 891 892 /* 893 * This is called to generate messages from the routing socket 894 * indicating a network interface has had addresses associated with it. 895 * if we ever reverse the logic and replace messages TO the routing 896 * socket indicate a request to configure interfaces, then it will 897 * be unnecessary as the routing socket will automatically generate 898 * copies of it. 899 */ 900 void 901 rt_newaddrmsg(int cmd, struct ifaddr *ifa, int error, struct rtentry *rt) 902 { 903 struct rt_addrinfo info; 904 struct sockaddr *sa = NULL; 905 int pass; 906 struct mbuf *m = NULL; 907 struct ifnet *ifp = ifa->ifa_ifp; 908 909 KASSERT(cmd == RTM_ADD || cmd == RTM_DELETE, 910 ("unexpected cmd %u", cmd)); 911 #ifdef SCTP 912 /* 913 * notify the SCTP stack 914 * this will only get called when an address is added/deleted 915 * XXX pass the ifaddr struct instead if ifa->ifa_addr... 916 */ 917 sctp_addr_change(ifa, cmd); 918 #endif /* SCTP */ 919 if (route_cb.any_count == 0) 920 return; 921 for (pass = 1; pass < 3; pass++) { 922 bzero((caddr_t)&info, sizeof(info)); 923 if ((cmd == RTM_ADD && pass == 1) || 924 (cmd == RTM_DELETE && pass == 2)) { 925 struct ifa_msghdr *ifam; 926 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 927 928 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; 929 info.rti_info[RTAX_IFP] = ifp->if_addr->ifa_addr; 930 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 931 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 932 if ((m = rt_msg1(ncmd, &info)) == NULL) 933 continue; 934 ifam = mtod(m, struct ifa_msghdr *); 935 ifam->ifam_index = ifp->if_index; 936 ifam->ifam_metric = ifa->ifa_metric; 937 ifam->ifam_flags = ifa->ifa_flags; 938 ifam->ifam_addrs = info.rti_addrs; 939 } 940 if ((cmd == RTM_ADD && pass == 2) || 941 (cmd == RTM_DELETE && pass == 1)) { 942 struct rt_msghdr *rtm; 943 944 if (rt == NULL) 945 continue; 946 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 947 info.rti_info[RTAX_DST] = sa = rt_key(rt); 948 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 949 if ((m = rt_msg1(cmd, &info)) == NULL) 950 continue; 951 rtm = mtod(m, struct rt_msghdr *); 952 rtm->rtm_index = ifp->if_index; 953 rtm->rtm_flags |= rt->rt_flags; 954 rtm->rtm_errno = error; 955 rtm->rtm_addrs = info.rti_addrs; 956 } 957 rt_dispatch(m, sa); 958 } 959 } 960 961 /* 962 * This is the analogue to the rt_newaddrmsg which performs the same 963 * function but for multicast group memberhips. This is easier since 964 * there is no route state to worry about. 965 */ 966 void 967 rt_newmaddrmsg(int cmd, struct ifmultiaddr *ifma) 968 { 969 struct rt_addrinfo info; 970 struct mbuf *m = NULL; 971 struct ifnet *ifp = ifma->ifma_ifp; 972 struct ifma_msghdr *ifmam; 973 974 if (route_cb.any_count == 0) 975 return; 976 977 bzero((caddr_t)&info, sizeof(info)); 978 info.rti_info[RTAX_IFA] = ifma->ifma_addr; 979 info.rti_info[RTAX_IFP] = ifp ? ifp->if_addr->ifa_addr : NULL; 980 /* 981 * If a link-layer address is present, present it as a ``gateway'' 982 * (similarly to how ARP entries, e.g., are presented). 983 */ 984 info.rti_info[RTAX_GATEWAY] = ifma->ifma_lladdr; 985 m = rt_msg1(cmd, &info); 986 if (m == NULL) 987 return; 988 ifmam = mtod(m, struct ifma_msghdr *); 989 KASSERT(ifp != NULL, ("%s: link-layer multicast address w/o ifp\n", 990 __func__)); 991 ifmam->ifmam_index = ifp->if_index; 992 ifmam->ifmam_addrs = info.rti_addrs; 993 rt_dispatch(m, ifma->ifma_addr); 994 } 995 996 static struct mbuf * 997 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 998 struct rt_addrinfo *info) 999 { 1000 struct if_announcemsghdr *ifan; 1001 struct mbuf *m; 1002 1003 if (route_cb.any_count == 0) 1004 return NULL; 1005 bzero((caddr_t)info, sizeof(*info)); 1006 m = rt_msg1(type, info); 1007 if (m != NULL) { 1008 ifan = mtod(m, struct if_announcemsghdr *); 1009 ifan->ifan_index = ifp->if_index; 1010 strlcpy(ifan->ifan_name, ifp->if_xname, 1011 sizeof(ifan->ifan_name)); 1012 ifan->ifan_what = what; 1013 } 1014 return m; 1015 } 1016 1017 /* 1018 * This is called to generate routing socket messages indicating 1019 * IEEE80211 wireless events. 1020 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1021 */ 1022 void 1023 rt_ieee80211msg(struct ifnet *ifp, int what, void *data, size_t data_len) 1024 { 1025 struct mbuf *m; 1026 struct rt_addrinfo info; 1027 1028 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1029 if (m != NULL) { 1030 /* 1031 * Append the ieee80211 data. Try to stick it in the 1032 * mbuf containing the ifannounce msg; otherwise allocate 1033 * a new mbuf and append. 1034 * 1035 * NB: we assume m is a single mbuf. 1036 */ 1037 if (data_len > M_TRAILINGSPACE(m)) { 1038 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 1039 if (n == NULL) { 1040 m_freem(m); 1041 return; 1042 } 1043 bcopy(data, mtod(n, void *), data_len); 1044 n->m_len = data_len; 1045 m->m_next = n; 1046 } else if (data_len > 0) { 1047 bcopy(data, mtod(m, u_int8_t *) + m->m_len, data_len); 1048 m->m_len += data_len; 1049 } 1050 if (m->m_flags & M_PKTHDR) 1051 m->m_pkthdr.len += data_len; 1052 mtod(m, struct if_announcemsghdr *)->ifan_msglen += data_len; 1053 rt_dispatch(m, NULL); 1054 } 1055 } 1056 1057 /* 1058 * This is called to generate routing socket messages indicating 1059 * network interface arrival and departure. 1060 */ 1061 void 1062 rt_ifannouncemsg(struct ifnet *ifp, int what) 1063 { 1064 struct mbuf *m; 1065 struct rt_addrinfo info; 1066 1067 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); 1068 if (m != NULL) 1069 rt_dispatch(m, NULL); 1070 } 1071 1072 static void 1073 rt_dispatch(struct mbuf *m, const struct sockaddr *sa) 1074 { 1075 struct m_tag *tag; 1076 1077 /* 1078 * Preserve the family from the sockaddr, if any, in an m_tag for 1079 * use when injecting the mbuf into the routing socket buffer from 1080 * the netisr. 1081 */ 1082 if (sa != NULL) { 1083 tag = m_tag_get(PACKET_TAG_RTSOCKFAM, sizeof(unsigned short), 1084 M_NOWAIT); 1085 if (tag == NULL) { 1086 m_freem(m); 1087 return; 1088 } 1089 *(unsigned short *)(tag + 1) = sa->sa_family; 1090 m_tag_prepend(m, tag); 1091 } 1092 netisr_queue(NETISR_ROUTE, m); /* mbuf is free'd on failure. */ 1093 } 1094 1095 /* 1096 * This is used in dumping the kernel table via sysctl(). 1097 */ 1098 static int 1099 sysctl_dumpentry(struct radix_node *rn, void *vw) 1100 { 1101 struct walkarg *w = vw; 1102 struct rtentry *rt = (struct rtentry *)rn; 1103 int error = 0, size; 1104 struct rt_addrinfo info; 1105 1106 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1107 return 0; 1108 bzero((caddr_t)&info, sizeof(info)); 1109 info.rti_info[RTAX_DST] = rt_key(rt); 1110 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1111 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1112 info.rti_info[RTAX_GENMASK] = rt->rt_genmask; 1113 if (rt->rt_ifp) { 1114 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_addr->ifa_addr; 1115 info.rti_info[RTAX_IFA] = rt->rt_ifa->ifa_addr; 1116 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1117 info.rti_info[RTAX_BRD] = rt->rt_ifa->ifa_dstaddr; 1118 } 1119 size = rt_msg2(RTM_GET, &info, NULL, w); 1120 if (w->w_req && w->w_tmem) { 1121 struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 1122 1123 rtm->rtm_flags = rt->rt_flags; 1124 rtm->rtm_use = rt->rt_rmx.rmx_pksent; 1125 rt_getmetrics(&rt->rt_rmx, &rtm->rtm_rmx); 1126 rtm->rtm_index = rt->rt_ifp->if_index; 1127 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1128 rtm->rtm_addrs = info.rti_addrs; 1129 error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size); 1130 return (error); 1131 } 1132 return (error); 1133 } 1134 1135 static int 1136 sysctl_iflist(int af, struct walkarg *w) 1137 { 1138 struct ifnet *ifp; 1139 struct ifaddr *ifa; 1140 struct rt_addrinfo info; 1141 int len, error = 0; 1142 1143 bzero((caddr_t)&info, sizeof(info)); 1144 IFNET_RLOCK(); 1145 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1146 if (w->w_arg && w->w_arg != ifp->if_index) 1147 continue; 1148 ifa = ifp->if_addr; 1149 info.rti_info[RTAX_IFP] = ifa->ifa_addr; 1150 len = rt_msg2(RTM_IFINFO, &info, NULL, w); 1151 info.rti_info[RTAX_IFP] = NULL; 1152 if (w->w_req && w->w_tmem) { 1153 struct if_msghdr *ifm; 1154 1155 ifm = (struct if_msghdr *)w->w_tmem; 1156 ifm->ifm_index = ifp->if_index; 1157 ifm->ifm_flags = ifp->if_flags | ifp->if_drv_flags; 1158 ifm->ifm_data = ifp->if_data; 1159 ifm->ifm_addrs = info.rti_addrs; 1160 error = SYSCTL_OUT(w->w_req,(caddr_t)ifm, len); 1161 if (error) 1162 goto done; 1163 } 1164 while ((ifa = TAILQ_NEXT(ifa, ifa_link)) != NULL) { 1165 if (af && af != ifa->ifa_addr->sa_family) 1166 continue; 1167 if (jailed(curthread->td_ucred) && 1168 prison_if(curthread->td_ucred, ifa->ifa_addr)) 1169 continue; 1170 info.rti_info[RTAX_IFA] = ifa->ifa_addr; 1171 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1172 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1173 len = rt_msg2(RTM_NEWADDR, &info, NULL, w); 1174 if (w->w_req && w->w_tmem) { 1175 struct ifa_msghdr *ifam; 1176 1177 ifam = (struct ifa_msghdr *)w->w_tmem; 1178 ifam->ifam_index = ifa->ifa_ifp->if_index; 1179 ifam->ifam_flags = ifa->ifa_flags; 1180 ifam->ifam_metric = ifa->ifa_metric; 1181 ifam->ifam_addrs = info.rti_addrs; 1182 error = SYSCTL_OUT(w->w_req, w->w_tmem, len); 1183 if (error) 1184 goto done; 1185 } 1186 } 1187 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] = 1188 info.rti_info[RTAX_BRD] = NULL; 1189 } 1190 done: 1191 IFNET_RUNLOCK(); 1192 return (error); 1193 } 1194 1195 int 1196 sysctl_ifmalist(int af, struct walkarg *w) 1197 { 1198 struct ifnet *ifp; 1199 struct ifmultiaddr *ifma; 1200 struct rt_addrinfo info; 1201 int len, error = 0; 1202 struct ifaddr *ifa; 1203 1204 bzero((caddr_t)&info, sizeof(info)); 1205 IFNET_RLOCK(); 1206 TAILQ_FOREACH(ifp, &ifnet, if_link) { 1207 if (w->w_arg && w->w_arg != ifp->if_index) 1208 continue; 1209 ifa = ifp->if_addr; 1210 info.rti_info[RTAX_IFP] = ifa ? ifa->ifa_addr : NULL; 1211 IF_ADDR_LOCK(ifp); 1212 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 1213 if (af && af != ifma->ifma_addr->sa_family) 1214 continue; 1215 if (jailed(curproc->p_ucred) && 1216 prison_if(curproc->p_ucred, ifma->ifma_addr)) 1217 continue; 1218 info.rti_info[RTAX_IFA] = ifma->ifma_addr; 1219 info.rti_info[RTAX_GATEWAY] = 1220 (ifma->ifma_addr->sa_family != AF_LINK) ? 1221 ifma->ifma_lladdr : NULL; 1222 len = rt_msg2(RTM_NEWMADDR, &info, NULL, w); 1223 if (w->w_req && w->w_tmem) { 1224 struct ifma_msghdr *ifmam; 1225 1226 ifmam = (struct ifma_msghdr *)w->w_tmem; 1227 ifmam->ifmam_index = ifma->ifma_ifp->if_index; 1228 ifmam->ifmam_flags = 0; 1229 ifmam->ifmam_addrs = info.rti_addrs; 1230 error = SYSCTL_OUT(w->w_req, w->w_tmem, len); 1231 if (error) { 1232 IF_ADDR_UNLOCK(ifp); 1233 goto done; 1234 } 1235 } 1236 } 1237 IF_ADDR_UNLOCK(ifp); 1238 } 1239 done: 1240 IFNET_RUNLOCK(); 1241 return (error); 1242 } 1243 1244 static int 1245 sysctl_rtsock(SYSCTL_HANDLER_ARGS) 1246 { 1247 int *name = (int *)arg1; 1248 u_int namelen = arg2; 1249 struct radix_node_head *rnh; 1250 int i, lim, error = EINVAL; 1251 u_char af; 1252 struct walkarg w; 1253 1254 name ++; 1255 namelen--; 1256 if (req->newptr) 1257 return (EPERM); 1258 if (namelen != 3) 1259 return ((namelen < 3) ? EISDIR : ENOTDIR); 1260 af = name[0]; 1261 if (af > AF_MAX) 1262 return (EINVAL); 1263 bzero(&w, sizeof(w)); 1264 w.w_op = name[1]; 1265 w.w_arg = name[2]; 1266 w.w_req = req; 1267 1268 error = sysctl_wire_old_buffer(req, 0); 1269 if (error) 1270 return (error); 1271 switch (w.w_op) { 1272 1273 case NET_RT_DUMP: 1274 case NET_RT_FLAGS: 1275 if (af == 0) { /* dump all tables */ 1276 i = 1; 1277 lim = AF_MAX; 1278 } else /* dump only one table */ 1279 i = lim = af; 1280 for (error = 0; error == 0 && i <= lim; i++) 1281 if ((rnh = rt_tables[i]) != NULL) { 1282 RADIX_NODE_HEAD_LOCK(rnh); 1283 error = rnh->rnh_walktree(rnh, 1284 sysctl_dumpentry, &w); 1285 RADIX_NODE_HEAD_UNLOCK(rnh); 1286 } else if (af != 0) 1287 error = EAFNOSUPPORT; 1288 break; 1289 1290 case NET_RT_IFLIST: 1291 error = sysctl_iflist(af, &w); 1292 break; 1293 1294 case NET_RT_IFMALIST: 1295 error = sysctl_ifmalist(af, &w); 1296 break; 1297 } 1298 if (w.w_tmem) 1299 free(w.w_tmem, M_RTABLE); 1300 return (error); 1301 } 1302 1303 SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, ""); 1304 1305 /* 1306 * Definitions of protocols supported in the ROUTE domain. 1307 */ 1308 1309 static struct domain routedomain; /* or at least forward */ 1310 1311 static struct protosw routesw[] = { 1312 { 1313 .pr_type = SOCK_RAW, 1314 .pr_domain = &routedomain, 1315 .pr_flags = PR_ATOMIC|PR_ADDR, 1316 .pr_output = route_output, 1317 .pr_ctlinput = raw_ctlinput, 1318 .pr_init = raw_init, 1319 .pr_usrreqs = &route_usrreqs 1320 } 1321 }; 1322 1323 static struct domain routedomain = { 1324 .dom_family = PF_ROUTE, 1325 .dom_name = "route", 1326 .dom_protosw = routesw, 1327 .dom_protoswNPROTOSW = &routesw[sizeof(routesw)/sizeof(routesw[0])] 1328 }; 1329 1330 DOMAIN_SET(route); 1331