rtsock.c revision 1.171
1 /* $NetBSD: rtsock.c,v 1.171 2015/05/02 17:18:03 rtr Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 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 project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1988, 1991, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)rtsock.c 8.7 (Berkeley) 10/12/95 61 */ 62 63 #include <sys/cdefs.h> 64 __KERNEL_RCSID(0, "$NetBSD: rtsock.c,v 1.171 2015/05/02 17:18:03 rtr Exp $"); 65 66 #ifdef _KERNEL_OPT 67 #include "opt_inet.h" 68 #include "opt_mpls.h" 69 #include "opt_compat_netbsd.h" 70 #endif 71 72 #include <sys/param.h> 73 #include <sys/systm.h> 74 #include <sys/proc.h> 75 #include <sys/socket.h> 76 #include <sys/socketvar.h> 77 #include <sys/domain.h> 78 #include <sys/protosw.h> 79 #include <sys/sysctl.h> 80 #include <sys/kauth.h> 81 #include <sys/kmem.h> 82 #include <sys/intr.h> 83 #ifdef RTSOCK_DEBUG 84 #include <netinet/in.h> 85 #endif /* RTSOCK_DEBUG */ 86 87 #include <net/if.h> 88 #include <net/route.h> 89 #include <net/raw_cb.h> 90 91 #include <netmpls/mpls.h> 92 93 #if defined(COMPAT_14) || defined(COMPAT_50) 94 #include <compat/net/if.h> 95 #include <compat/net/route.h> 96 #endif 97 #ifdef COMPAT_RTSOCK 98 #define RTM_XVERSION RTM_OVERSION 99 #define RT_XADVANCE(a,b) RT_OADVANCE(a,b) 100 #define RT_XROUNDUP(n) RT_OROUNDUP(n) 101 #define PF_XROUTE PF_OROUTE 102 #define rt_xmsghdr rt_msghdr50 103 #define if_xmsghdr if_msghdr /* if_msghdr50 is for RTM_OIFINFO */ 104 #define ifa_xmsghdr ifa_msghdr50 105 #define if_xannouncemsghdr if_announcemsghdr50 106 #define COMPATNAME(x) compat_50_ ## x 107 #define DOMAINNAME "oroute" 108 CTASSERT(sizeof(struct ifa_xmsghdr) == 20); 109 DOMAIN_DEFINE(compat_50_routedomain); /* forward declare and add to link set */ 110 #else /* COMPAT_RTSOCK */ 111 #define RTM_XVERSION RTM_VERSION 112 #define RT_XADVANCE(a,b) RT_ADVANCE(a,b) 113 #define RT_XROUNDUP(n) RT_ROUNDUP(n) 114 #define PF_XROUTE PF_ROUTE 115 #define rt_xmsghdr rt_msghdr 116 #define if_xmsghdr if_msghdr 117 #define ifa_xmsghdr ifa_msghdr 118 #define if_xannouncemsghdr if_announcemsghdr 119 #define COMPATNAME(x) x 120 #define DOMAINNAME "route" 121 CTASSERT(sizeof(struct ifa_xmsghdr) == 24); 122 #ifdef COMPAT_50 123 #define COMPATCALL(name, args) compat_50_ ## name args 124 #endif 125 DOMAIN_DEFINE(routedomain); /* forward declare and add to link set */ 126 #undef COMPAT_50 127 #undef COMPAT_14 128 #endif /* COMPAT_RTSOCK */ 129 130 #ifndef COMPATCALL 131 #define COMPATCALL(name, args) do { } while (/*CONSTCOND*/ 0) 132 #endif 133 134 #ifdef RTSOCK_DEBUG 135 #define RT_IN_PRINT(b, a) (in_print((b), sizeof(b), \ 136 &((const struct sockaddr_in *)info.rti_info[(a)])->sin_addr), (b)) 137 #endif /* RTSOCK_DEBUG */ 138 139 struct route_info COMPATNAME(route_info) = { 140 .ri_dst = { .sa_len = 2, .sa_family = PF_XROUTE, }, 141 .ri_src = { .sa_len = 2, .sa_family = PF_XROUTE, }, 142 .ri_maxqlen = IFQ_MAXLEN, 143 }; 144 145 #define PRESERVED_RTF (RTF_UP | RTF_GATEWAY | RTF_HOST | RTF_DONE | RTF_MASK) 146 147 static void COMPATNAME(route_init)(void); 148 static int COMPATNAME(route_output)(struct mbuf *, ...); 149 150 static int rt_msg2(int, struct rt_addrinfo *, void *, struct rt_walkarg *, int *); 151 static int rt_xaddrs(u_char, const char *, const char *, struct rt_addrinfo *); 152 static struct mbuf *rt_makeifannouncemsg(struct ifnet *, int, int, 153 struct rt_addrinfo *); 154 static void rt_setmetrics(int, const struct rt_xmsghdr *, struct rtentry *); 155 static void rtm_setmetrics(const struct rtentry *, struct rt_xmsghdr *); 156 static void sysctl_net_route_setup(struct sysctllog **); 157 static int sysctl_dumpentry(struct rtentry *, void *); 158 static int sysctl_iflist(int, struct rt_walkarg *, int); 159 static int sysctl_rtable(SYSCTLFN_PROTO); 160 static void rt_adjustcount(int, int); 161 162 static void 163 rt_adjustcount(int af, int cnt) 164 { 165 struct route_cb * const cb = &COMPATNAME(route_info).ri_cb; 166 167 cb->any_count += cnt; 168 169 switch (af) { 170 case AF_INET: 171 cb->ip_count += cnt; 172 return; 173 #ifdef INET6 174 case AF_INET6: 175 cb->ip6_count += cnt; 176 return; 177 #endif 178 case AF_MPLS: 179 cb->mpls_count += cnt; 180 return; 181 } 182 } 183 184 static int 185 COMPATNAME(route_attach)(struct socket *so, int proto) 186 { 187 struct rawcb *rp; 188 int s, error; 189 190 KASSERT(sotorawcb(so) == NULL); 191 rp = kmem_zalloc(sizeof(*rp), KM_SLEEP); 192 rp->rcb_len = sizeof(*rp); 193 so->so_pcb = rp; 194 195 s = splsoftnet(); 196 if ((error = raw_attach(so, proto)) == 0) { 197 rt_adjustcount(rp->rcb_proto.sp_protocol, 1); 198 rp->rcb_laddr = &COMPATNAME(route_info).ri_src; 199 rp->rcb_faddr = &COMPATNAME(route_info).ri_dst; 200 } 201 splx(s); 202 203 if (error) { 204 kmem_free(rp, sizeof(*rp)); 205 so->so_pcb = NULL; 206 return error; 207 } 208 209 soisconnected(so); 210 so->so_options |= SO_USELOOPBACK; 211 KASSERT(solocked(so)); 212 213 return error; 214 } 215 216 static void 217 COMPATNAME(route_detach)(struct socket *so) 218 { 219 struct rawcb *rp = sotorawcb(so); 220 int s; 221 222 KASSERT(rp != NULL); 223 KASSERT(solocked(so)); 224 225 s = splsoftnet(); 226 rt_adjustcount(rp->rcb_proto.sp_protocol, -1); 227 raw_detach(so); 228 splx(s); 229 } 230 231 static int 232 COMPATNAME(route_accept)(struct socket *so, struct sockaddr *nam) 233 { 234 KASSERT(solocked(so)); 235 236 panic("route_accept"); 237 238 return EOPNOTSUPP; 239 } 240 241 static int 242 COMPATNAME(route_bind)(struct socket *so, struct sockaddr *nam, struct lwp *l) 243 { 244 KASSERT(solocked(so)); 245 246 return EOPNOTSUPP; 247 } 248 249 static int 250 COMPATNAME(route_listen)(struct socket *so, struct lwp *l) 251 { 252 KASSERT(solocked(so)); 253 254 return EOPNOTSUPP; 255 } 256 257 static int 258 COMPATNAME(route_connect)(struct socket *so, struct sockaddr *nam, struct lwp *l) 259 { 260 KASSERT(solocked(so)); 261 262 return EOPNOTSUPP; 263 } 264 265 static int 266 COMPATNAME(route_connect2)(struct socket *so, struct socket *so2) 267 { 268 KASSERT(solocked(so)); 269 270 return EOPNOTSUPP; 271 } 272 273 static int 274 COMPATNAME(route_disconnect)(struct socket *so) 275 { 276 struct rawcb *rp = sotorawcb(so); 277 int s; 278 279 KASSERT(solocked(so)); 280 KASSERT(rp != NULL); 281 282 s = splsoftnet(); 283 soisdisconnected(so); 284 raw_disconnect(rp); 285 splx(s); 286 287 return 0; 288 } 289 290 static int 291 COMPATNAME(route_shutdown)(struct socket *so) 292 { 293 int s; 294 295 KASSERT(solocked(so)); 296 297 /* 298 * Mark the connection as being incapable of further input. 299 */ 300 s = splsoftnet(); 301 socantsendmore(so); 302 splx(s); 303 return 0; 304 } 305 306 static int 307 COMPATNAME(route_abort)(struct socket *so) 308 { 309 KASSERT(solocked(so)); 310 311 panic("route_abort"); 312 313 return EOPNOTSUPP; 314 } 315 316 static int 317 COMPATNAME(route_ioctl)(struct socket *so, u_long cmd, void *nam, 318 struct ifnet * ifp) 319 { 320 return EOPNOTSUPP; 321 } 322 323 static int 324 COMPATNAME(route_stat)(struct socket *so, struct stat *ub) 325 { 326 KASSERT(solocked(so)); 327 328 return 0; 329 } 330 331 static int 332 COMPATNAME(route_peeraddr)(struct socket *so, struct sockaddr *nam) 333 { 334 struct rawcb *rp = sotorawcb(so); 335 336 KASSERT(solocked(so)); 337 KASSERT(rp != NULL); 338 KASSERT(nam != NULL); 339 340 if (rp->rcb_faddr == NULL) 341 return ENOTCONN; 342 343 raw_setpeeraddr(rp, nam); 344 return 0; 345 } 346 347 static int 348 COMPATNAME(route_sockaddr)(struct socket *so, struct sockaddr *nam) 349 { 350 struct rawcb *rp = sotorawcb(so); 351 352 KASSERT(solocked(so)); 353 KASSERT(rp != NULL); 354 KASSERT(nam != NULL); 355 356 if (rp->rcb_faddr == NULL) 357 return ENOTCONN; 358 359 raw_setsockaddr(rp, nam); 360 return 0; 361 } 362 363 static int 364 COMPATNAME(route_rcvd)(struct socket *so, int flags, struct lwp *l) 365 { 366 KASSERT(solocked(so)); 367 368 return EOPNOTSUPP; 369 } 370 371 static int 372 COMPATNAME(route_recvoob)(struct socket *so, struct mbuf *m, int flags) 373 { 374 KASSERT(solocked(so)); 375 376 return EOPNOTSUPP; 377 } 378 379 static int 380 COMPATNAME(route_send)(struct socket *so, struct mbuf *m, 381 struct sockaddr *nam, struct mbuf *control, struct lwp *l) 382 { 383 int error = 0; 384 int s; 385 386 KASSERT(solocked(so)); 387 388 s = splsoftnet(); 389 error = raw_send(so, m, nam, control, l); 390 splx(s); 391 392 return error; 393 } 394 395 static int 396 COMPATNAME(route_sendoob)(struct socket *so, struct mbuf *m, 397 struct mbuf *control) 398 { 399 KASSERT(solocked(so)); 400 401 m_freem(m); 402 m_freem(control); 403 404 return EOPNOTSUPP; 405 } 406 static int 407 COMPATNAME(route_purgeif)(struct socket *so, struct ifnet *ifp) 408 { 409 410 panic("route_purgeif"); 411 412 return EOPNOTSUPP; 413 } 414 415 /*ARGSUSED*/ 416 int 417 COMPATNAME(route_output)(struct mbuf *m, ...) 418 { 419 struct sockproto proto = { .sp_family = PF_XROUTE, }; 420 struct rt_xmsghdr *rtm = NULL; 421 struct rt_xmsghdr *old_rtm = NULL; 422 struct rtentry *rt = NULL; 423 struct rtentry *saved_nrt = NULL; 424 struct rt_addrinfo info; 425 int len, error = 0; 426 struct ifnet *ifp = NULL; 427 struct ifaddr *ifa = NULL; 428 struct socket *so; 429 va_list ap; 430 sa_family_t family; 431 432 va_start(ap, m); 433 so = va_arg(ap, struct socket *); 434 va_end(ap); 435 436 #define senderr(e) do { error = e; goto flush;} while (/*CONSTCOND*/ 0) 437 if (m == NULL || ((m->m_len < sizeof(int32_t)) && 438 (m = m_pullup(m, sizeof(int32_t))) == NULL)) 439 return ENOBUFS; 440 if ((m->m_flags & M_PKTHDR) == 0) 441 panic("%s", __func__); 442 len = m->m_pkthdr.len; 443 if (len < sizeof(*rtm) || 444 len != mtod(m, struct rt_xmsghdr *)->rtm_msglen) { 445 info.rti_info[RTAX_DST] = NULL; 446 senderr(EINVAL); 447 } 448 R_Malloc(rtm, struct rt_xmsghdr *, len); 449 if (rtm == NULL) { 450 info.rti_info[RTAX_DST] = NULL; 451 senderr(ENOBUFS); 452 } 453 m_copydata(m, 0, len, rtm); 454 if (rtm->rtm_version != RTM_XVERSION) { 455 info.rti_info[RTAX_DST] = NULL; 456 senderr(EPROTONOSUPPORT); 457 } 458 rtm->rtm_pid = curproc->p_pid; 459 memset(&info, 0, sizeof(info)); 460 info.rti_addrs = rtm->rtm_addrs; 461 if (rt_xaddrs(rtm->rtm_type, (const char *)(rtm + 1), len + (char *)rtm, 462 &info)) { 463 senderr(EINVAL); 464 } 465 info.rti_flags = rtm->rtm_flags; 466 #ifdef RTSOCK_DEBUG 467 if (info.rti_info[RTAX_DST]->sa_family == AF_INET) { 468 char abuf[INET_ADDRSTRLEN]; 469 printf("%s: extracted info.rti_info[RTAX_DST] %s\n", __func__, 470 RT_IN_PRINT(abuf, RTAX_DST)); 471 } 472 #endif /* RTSOCK_DEBUG */ 473 if (info.rti_info[RTAX_DST] == NULL || 474 (info.rti_info[RTAX_DST]->sa_family >= AF_MAX)) { 475 senderr(EINVAL); 476 } 477 if (info.rti_info[RTAX_GATEWAY] != NULL && 478 (info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) { 479 senderr(EINVAL); 480 } 481 482 /* 483 * Verify that the caller has the appropriate privilege; RTM_GET 484 * is the only operation the non-superuser is allowed. 485 */ 486 if (kauth_authorize_network(curlwp->l_cred, KAUTH_NETWORK_ROUTE, 487 0, rtm, NULL, NULL) != 0) 488 senderr(EACCES); 489 490 switch (rtm->rtm_type) { 491 492 case RTM_ADD: 493 if (info.rti_info[RTAX_GATEWAY] == NULL) { 494 senderr(EINVAL); 495 } 496 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 497 if (error == 0 && saved_nrt) { 498 rt_setmetrics(rtm->rtm_inits, rtm, saved_nrt); 499 saved_nrt->rt_refcnt--; 500 } 501 break; 502 503 case RTM_DELETE: 504 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 505 if (error == 0) { 506 (rt = saved_nrt)->rt_refcnt++; 507 goto report; 508 } 509 break; 510 511 case RTM_GET: 512 case RTM_CHANGE: 513 case RTM_LOCK: 514 /* XXX This will mask info.rti_info[RTAX_DST] with 515 * info.rti_info[RTAX_NETMASK] before 516 * searching. It did not used to do that. --dyoung 517 */ 518 error = rtrequest1(RTM_GET, &info, &rt); 519 if (error != 0) 520 senderr(error); 521 if (rtm->rtm_type != RTM_GET) {/* XXX: too grotty */ 522 if (memcmp(info.rti_info[RTAX_DST], rt_getkey(rt), 523 info.rti_info[RTAX_DST]->sa_len) != 0) 524 senderr(ESRCH); 525 if (info.rti_info[RTAX_NETMASK] == NULL && 526 rt_mask(rt) != NULL) 527 senderr(ETOOMANYREFS); 528 } 529 530 switch (rtm->rtm_type) { 531 case RTM_GET: 532 report: 533 info.rti_info[RTAX_DST] = rt_getkey(rt); 534 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 535 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 536 info.rti_info[RTAX_TAG] = rt_gettag(rt); 537 if ((rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) == 0) 538 ; 539 else if ((ifp = rt->rt_ifp) != NULL) { 540 const struct ifaddr *rtifa; 541 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 542 /* rtifa used to be simply rt->rt_ifa. 543 * If rt->rt_ifa != NULL, then 544 * rt_get_ifa() != NULL. So this 545 * ought to still be safe. --dyoung 546 */ 547 rtifa = rt_get_ifa(rt); 548 info.rti_info[RTAX_IFA] = rtifa->ifa_addr; 549 #ifdef RTSOCK_DEBUG 550 if (info.rti_info[RTAX_IFA]->sa_family == 551 AF_INET) { 552 char ibuf[INET_ADDRSTRLEN]; 553 char abuf[INET_ADDRSTRLEN]; 554 printf("%s: copying out RTAX_IFA %s " 555 "for info.rti_info[RTAX_DST] %s " 556 "ifa_getifa %p ifa_seqno %p\n", 557 __func__, 558 RT_IN_PRINT(ibuf, RTAX_IFA), 559 RT_IN_PRINT(abuf, RTAX_DST), 560 (void *)rtifa->ifa_getifa, 561 rtifa->ifa_seqno); 562 } 563 #endif /* RTSOCK_DEBUG */ 564 if (ifp->if_flags & IFF_POINTOPOINT) { 565 info.rti_info[RTAX_BRD] = 566 rtifa->ifa_dstaddr; 567 } else 568 info.rti_info[RTAX_BRD] = NULL; 569 rtm->rtm_index = ifp->if_index; 570 } else { 571 info.rti_info[RTAX_IFP] = NULL; 572 info.rti_info[RTAX_IFA] = NULL; 573 } 574 (void)rt_msg2(rtm->rtm_type, &info, NULL, NULL, &len); 575 if (len > rtm->rtm_msglen) { 576 old_rtm = rtm; 577 R_Malloc(rtm, struct rt_xmsghdr *, len); 578 if (rtm == NULL) 579 senderr(ENOBUFS); 580 (void)memcpy(rtm, old_rtm, old_rtm->rtm_msglen); 581 } 582 (void)rt_msg2(rtm->rtm_type, &info, rtm, NULL, 0); 583 rtm->rtm_flags = rt->rt_flags; 584 rtm_setmetrics(rt, rtm); 585 rtm->rtm_addrs = info.rti_addrs; 586 break; 587 588 case RTM_CHANGE: 589 /* 590 * new gateway could require new ifaddr, ifp; 591 * flags may also be different; ifp may be specified 592 * by ll sockaddr when protocol address is ambiguous 593 */ 594 if ((error = rt_getifa(&info)) != 0) 595 senderr(error); 596 if (info.rti_info[RTAX_GATEWAY] && 597 rt_setgate(rt, info.rti_info[RTAX_GATEWAY])) 598 senderr(EDQUOT); 599 if (info.rti_info[RTAX_TAG]) 600 rt_settag(rt, info.rti_info[RTAX_TAG]); 601 /* new gateway could require new ifaddr, ifp; 602 flags may also be different; ifp may be specified 603 by ll sockaddr when protocol address is ambiguous */ 604 if (info.rti_info[RTAX_IFP] && 605 (ifa = ifa_ifwithnet(info.rti_info[RTAX_IFP])) && 606 (ifp = ifa->ifa_ifp) && (info.rti_info[RTAX_IFA] || 607 info.rti_info[RTAX_GATEWAY])) { 608 if (info.rti_info[RTAX_IFA] == NULL || 609 (ifa = ifa_ifwithaddr( 610 info.rti_info[RTAX_IFA])) == NULL) 611 ifa = ifaof_ifpforaddr( 612 info.rti_info[RTAX_IFA] ? 613 info.rti_info[RTAX_IFA] : 614 info.rti_info[RTAX_GATEWAY], ifp); 615 } else if ((info.rti_info[RTAX_IFA] && 616 (ifa = ifa_ifwithaddr(info.rti_info[RTAX_IFA]))) || 617 (info.rti_info[RTAX_GATEWAY] && 618 (ifa = ifa_ifwithroute(rt->rt_flags, 619 rt_getkey(rt), info.rti_info[RTAX_GATEWAY])))) { 620 ifp = ifa->ifa_ifp; 621 } 622 if (ifa) { 623 struct ifaddr *oifa = rt->rt_ifa; 624 if (oifa != ifa) { 625 if (oifa && oifa->ifa_rtrequest) { 626 oifa->ifa_rtrequest(RTM_DELETE, 627 rt, &info); 628 } 629 rt_replace_ifa(rt, ifa); 630 rt->rt_ifp = ifp; 631 } 632 } 633 if (ifp && rt->rt_ifp != ifp) 634 rt->rt_ifp = ifp; 635 rt_setmetrics(rtm->rtm_inits, rtm, rt); 636 if (rt->rt_flags != info.rti_flags) 637 rt->rt_flags = (info.rti_flags & ~PRESERVED_RTF) 638 | (rt->rt_flags & PRESERVED_RTF); 639 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 640 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info); 641 /*FALLTHROUGH*/ 642 case RTM_LOCK: 643 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 644 rt->rt_rmx.rmx_locks |= 645 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 646 break; 647 } 648 break; 649 650 default: 651 senderr(EOPNOTSUPP); 652 } 653 654 flush: 655 if (rtm) { 656 if (error) 657 rtm->rtm_errno = error; 658 else 659 rtm->rtm_flags |= RTF_DONE; 660 } 661 family = info.rti_info[RTAX_DST] ? info.rti_info[RTAX_DST]->sa_family : 662 0; 663 /* We cannot free old_rtm until we have stopped using the 664 * pointers in info, some of which may point to sockaddrs 665 * in old_rtm. 666 */ 667 if (old_rtm != NULL) 668 Free(old_rtm); 669 if (rt) 670 rtfree(rt); 671 { 672 struct rawcb *rp = NULL; 673 /* 674 * Check to see if we don't want our own messages. 675 */ 676 if ((so->so_options & SO_USELOOPBACK) == 0) { 677 if (COMPATNAME(route_info).ri_cb.any_count <= 1) { 678 if (rtm) 679 Free(rtm); 680 m_freem(m); 681 return error; 682 } 683 /* There is another listener, so construct message */ 684 rp = sotorawcb(so); 685 } 686 if (rtm) { 687 m_copyback(m, 0, rtm->rtm_msglen, rtm); 688 if (m->m_pkthdr.len < rtm->rtm_msglen) { 689 m_freem(m); 690 m = NULL; 691 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 692 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 693 Free(rtm); 694 } 695 if (rp) 696 rp->rcb_proto.sp_family = 0; /* Avoid us */ 697 if (family) 698 proto.sp_protocol = family; 699 if (m) 700 raw_input(m, &proto, &COMPATNAME(route_info).ri_src, 701 &COMPATNAME(route_info).ri_dst); 702 if (rp) 703 rp->rcb_proto.sp_family = PF_XROUTE; 704 } 705 return error; 706 } 707 708 static void 709 rt_setmetrics(int which, const struct rt_xmsghdr *in, struct rtentry *out) 710 { 711 #define metric(f, e) if (which & (f)) out->rt_rmx.e = in->rtm_rmx.e; 712 metric(RTV_RPIPE, rmx_recvpipe); 713 metric(RTV_SPIPE, rmx_sendpipe); 714 metric(RTV_SSTHRESH, rmx_ssthresh); 715 metric(RTV_RTT, rmx_rtt); 716 metric(RTV_RTTVAR, rmx_rttvar); 717 metric(RTV_HOPCOUNT, rmx_hopcount); 718 metric(RTV_MTU, rmx_mtu); 719 metric(RTV_EXPIRE, rmx_expire); 720 #undef metric 721 } 722 723 static void 724 rtm_setmetrics(const struct rtentry *in, struct rt_xmsghdr *out) 725 { 726 #define metric(e) out->rtm_rmx.e = in->rt_rmx.e; 727 metric(rmx_recvpipe); 728 metric(rmx_sendpipe); 729 metric(rmx_ssthresh); 730 metric(rmx_rtt); 731 metric(rmx_rttvar); 732 metric(rmx_hopcount); 733 metric(rmx_mtu); 734 metric(rmx_expire); 735 #undef metric 736 } 737 738 static int 739 rt_xaddrs(u_char rtmtype, const char *cp, const char *cplim, 740 struct rt_addrinfo *rtinfo) 741 { 742 const struct sockaddr *sa = NULL; /* Quell compiler warning */ 743 int i; 744 745 for (i = 0; i < RTAX_MAX && cp < cplim; i++) { 746 if ((rtinfo->rti_addrs & (1 << i)) == 0) 747 continue; 748 rtinfo->rti_info[i] = sa = (const struct sockaddr *)cp; 749 RT_XADVANCE(cp, sa); 750 } 751 752 /* 753 * Check for extra addresses specified, except RTM_GET asking 754 * for interface info. 755 */ 756 if (rtmtype == RTM_GET) { 757 if (((rtinfo->rti_addrs & 758 (~((1 << RTAX_IFP) | (1 << RTAX_IFA)))) & (~0 << i)) != 0) 759 return 1; 760 } else if ((rtinfo->rti_addrs & (~0 << i)) != 0) 761 return 1; 762 /* Check for bad data length. */ 763 if (cp != cplim) { 764 if (i == RTAX_NETMASK + 1 && sa != NULL && 765 cp - RT_XROUNDUP(sa->sa_len) + sa->sa_len == cplim) 766 /* 767 * The last sockaddr was info.rti_info[RTAX_NETMASK]. 768 * We accept this for now for the sake of old 769 * binaries or third party softwares. 770 */ 771 ; 772 else 773 return 1; 774 } 775 return 0; 776 } 777 778 static int 779 rt_getlen(int type) 780 { 781 #ifndef COMPAT_RTSOCK 782 CTASSERT(__alignof(struct ifa_msghdr) >= sizeof(uint64_t)); 783 CTASSERT(__alignof(struct if_msghdr) >= sizeof(uint64_t)); 784 CTASSERT(__alignof(struct if_announcemsghdr) >= sizeof(uint64_t)); 785 CTASSERT(__alignof(struct rt_msghdr) >= sizeof(uint64_t)); 786 #endif 787 788 switch (type) { 789 case RTM_DELADDR: 790 case RTM_NEWADDR: 791 case RTM_CHGADDR: 792 return sizeof(struct ifa_xmsghdr); 793 794 case RTM_OOIFINFO: 795 #ifdef COMPAT_14 796 return sizeof(struct if_msghdr14); 797 #else 798 #ifdef DIAGNOSTIC 799 printf("RTM_OOIFINFO\n"); 800 #endif 801 return -1; 802 #endif 803 case RTM_OIFINFO: 804 #ifdef COMPAT_50 805 return sizeof(struct if_msghdr50); 806 #else 807 #ifdef DIAGNOSTIC 808 printf("RTM_OIFINFO\n"); 809 #endif 810 return -1; 811 #endif 812 813 case RTM_IFINFO: 814 return sizeof(struct if_xmsghdr); 815 816 case RTM_IFANNOUNCE: 817 case RTM_IEEE80211: 818 return sizeof(struct if_xannouncemsghdr); 819 820 default: 821 return sizeof(struct rt_xmsghdr); 822 } 823 } 824 825 826 struct mbuf * 827 COMPATNAME(rt_msg1)(int type, struct rt_addrinfo *rtinfo, void *data, int datalen) 828 { 829 struct rt_xmsghdr *rtm; 830 struct mbuf *m; 831 int i; 832 const struct sockaddr *sa; 833 int len, dlen; 834 835 m = m_gethdr(M_DONTWAIT, MT_DATA); 836 if (m == NULL) 837 return m; 838 MCLAIM(m, &COMPATNAME(routedomain).dom_mowner); 839 840 if ((len = rt_getlen(type)) == -1) 841 goto out; 842 if (len > MHLEN + MLEN) 843 panic("%s: message too long", __func__); 844 else if (len > MHLEN) { 845 m->m_next = m_get(M_DONTWAIT, MT_DATA); 846 if (m->m_next == NULL) 847 goto out; 848 MCLAIM(m->m_next, m->m_owner); 849 m->m_pkthdr.len = len; 850 m->m_len = MHLEN; 851 m->m_next->m_len = len - MHLEN; 852 } else { 853 m->m_pkthdr.len = m->m_len = len; 854 } 855 m->m_pkthdr.rcvif = NULL; 856 m_copyback(m, 0, datalen, data); 857 if (len > datalen) 858 (void)memset(mtod(m, char *) + datalen, 0, len - datalen); 859 rtm = mtod(m, struct rt_xmsghdr *); 860 for (i = 0; i < RTAX_MAX; i++) { 861 if ((sa = rtinfo->rti_info[i]) == NULL) 862 continue; 863 rtinfo->rti_addrs |= (1 << i); 864 dlen = RT_XROUNDUP(sa->sa_len); 865 m_copyback(m, len, sa->sa_len, sa); 866 if (dlen != sa->sa_len) { 867 /* 868 * Up to 6 + 1 nul's since roundup is to 869 * sizeof(uint64_t) (8 bytes) 870 */ 871 m_copyback(m, len + sa->sa_len, 872 dlen - sa->sa_len, "\0\0\0\0\0\0"); 873 } 874 len += dlen; 875 } 876 if (m->m_pkthdr.len != len) 877 goto out; 878 rtm->rtm_msglen = len; 879 rtm->rtm_version = RTM_XVERSION; 880 rtm->rtm_type = type; 881 return m; 882 out: 883 m_freem(m); 884 return NULL; 885 } 886 887 /* 888 * rt_msg2 889 * 890 * fills 'cp' or 'w'.w_tmem with the routing socket message and 891 * returns the length of the message in 'lenp'. 892 * 893 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 894 * the message 895 * otherwise walkarg's w_needed is updated and if the user buffer is 896 * specified and w_needed indicates space exists the information is copied 897 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 898 * if the allocation fails ENOBUFS is returned. 899 */ 900 static int 901 rt_msg2(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 902 int *lenp) 903 { 904 int i; 905 int len, dlen, second_time = 0; 906 char *cp0, *cp = cpv; 907 908 rtinfo->rti_addrs = 0; 909 again: 910 if ((len = rt_getlen(type)) == -1) 911 return EINVAL; 912 913 if ((cp0 = cp) != NULL) 914 cp += len; 915 for (i = 0; i < RTAX_MAX; i++) { 916 const struct sockaddr *sa; 917 918 if ((sa = rtinfo->rti_info[i]) == NULL) 919 continue; 920 rtinfo->rti_addrs |= (1 << i); 921 dlen = RT_XROUNDUP(sa->sa_len); 922 if (cp) { 923 int diff = dlen - sa->sa_len; 924 (void)memcpy(cp, sa, (size_t)sa->sa_len); 925 cp += sa->sa_len; 926 if (diff > 0) { 927 (void)memset(cp, 0, (size_t)diff); 928 cp += diff; 929 } 930 } 931 len += dlen; 932 } 933 if (cp == NULL && w != NULL && !second_time) { 934 struct rt_walkarg *rw = w; 935 936 rw->w_needed += len; 937 if (rw->w_needed <= 0 && rw->w_where) { 938 if (rw->w_tmemsize < len) { 939 if (rw->w_tmem) 940 free(rw->w_tmem, M_RTABLE); 941 rw->w_tmem = malloc(len, M_RTABLE, M_NOWAIT); 942 if (rw->w_tmem) 943 rw->w_tmemsize = len; 944 else 945 rw->w_tmemsize = 0; 946 } 947 if (rw->w_tmem) { 948 cp = rw->w_tmem; 949 second_time = 1; 950 goto again; 951 } else { 952 rw->w_tmemneeded = len; 953 return ENOBUFS; 954 } 955 } 956 } 957 if (cp) { 958 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)cp0; 959 960 rtm->rtm_version = RTM_XVERSION; 961 rtm->rtm_type = type; 962 rtm->rtm_msglen = len; 963 } 964 if (lenp) 965 *lenp = len; 966 return 0; 967 } 968 969 /* 970 * This routine is called to generate a message from the routing 971 * socket indicating that a redirect has occurred, a routing lookup 972 * has failed, or that a protocol has detected timeouts to a particular 973 * destination. 974 */ 975 void 976 COMPATNAME(rt_missmsg)(int type, const struct rt_addrinfo *rtinfo, int flags, 977 int error) 978 { 979 struct rt_xmsghdr rtm; 980 struct mbuf *m; 981 const struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 982 struct rt_addrinfo info = *rtinfo; 983 984 COMPATCALL(rt_missmsg, (type, rtinfo, flags, error)); 985 if (COMPATNAME(route_info).ri_cb.any_count == 0) 986 return; 987 memset(&rtm, 0, sizeof(rtm)); 988 rtm.rtm_flags = RTF_DONE | flags; 989 rtm.rtm_errno = error; 990 m = COMPATNAME(rt_msg1)(type, &info, &rtm, sizeof(rtm)); 991 if (m == NULL) 992 return; 993 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 994 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 995 } 996 997 /* 998 * This routine is called to generate a message from the routing 999 * socket indicating that the status of a network interface has changed. 1000 */ 1001 void 1002 COMPATNAME(rt_ifmsg)(struct ifnet *ifp) 1003 { 1004 struct if_xmsghdr ifm; 1005 struct mbuf *m; 1006 struct rt_addrinfo info; 1007 1008 COMPATCALL(rt_ifmsg, (ifp)); 1009 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1010 return; 1011 (void)memset(&info, 0, sizeof(info)); 1012 (void)memset(&ifm, 0, sizeof(ifm)); 1013 ifm.ifm_index = ifp->if_index; 1014 ifm.ifm_flags = ifp->if_flags; 1015 ifm.ifm_data = ifp->if_data; 1016 ifm.ifm_addrs = 0; 1017 m = COMPATNAME(rt_msg1)(RTM_IFINFO, &info, &ifm, sizeof(ifm)); 1018 if (m == NULL) 1019 return; 1020 COMPATNAME(route_enqueue)(m, 0); 1021 #ifdef COMPAT_14 1022 compat_14_rt_oifmsg(ifp); 1023 #endif 1024 #ifdef COMPAT_50 1025 compat_50_rt_oifmsg(ifp); 1026 #endif 1027 } 1028 1029 1030 /* 1031 * This is called to generate messages from the routing socket 1032 * indicating a network interface has had addresses associated with it. 1033 * if we ever reverse the logic and replace messages TO the routing 1034 * socket indicate a request to configure interfaces, then it will 1035 * be unnecessary as the routing socket will automatically generate 1036 * copies of it. 1037 */ 1038 void 1039 COMPATNAME(rt_newaddrmsg)(int cmd, struct ifaddr *ifa, int error, 1040 struct rtentry *rt) 1041 { 1042 #define cmdpass(__cmd, __pass) (((__cmd) << 2) | (__pass)) 1043 struct rt_addrinfo info; 1044 const struct sockaddr *sa; 1045 int pass; 1046 struct mbuf *m; 1047 struct ifnet *ifp; 1048 struct rt_xmsghdr rtm; 1049 struct ifa_xmsghdr ifam; 1050 int ncmd; 1051 1052 KASSERT(ifa != NULL); 1053 ifp = ifa->ifa_ifp; 1054 COMPATCALL(rt_newaddrmsg, (cmd, ifa, error, rt)); 1055 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1056 return; 1057 for (pass = 1; pass < 3; pass++) { 1058 memset(&info, 0, sizeof(info)); 1059 switch (cmdpass(cmd, pass)) { 1060 case cmdpass(RTM_ADD, 1): 1061 case cmdpass(RTM_CHANGE, 1): 1062 case cmdpass(RTM_DELETE, 2): 1063 case cmdpass(RTM_NEWADDR, 1): 1064 case cmdpass(RTM_DELADDR, 1): 1065 case cmdpass(RTM_CHGADDR, 1): 1066 switch (cmd) { 1067 case RTM_ADD: 1068 ncmd = RTM_NEWADDR; 1069 break; 1070 case RTM_DELETE: 1071 ncmd = RTM_DELADDR; 1072 break; 1073 case RTM_CHANGE: 1074 ncmd = RTM_CHGADDR; 1075 break; 1076 default: 1077 ncmd = cmd; 1078 } 1079 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; 1080 KASSERT(ifp->if_dl != NULL); 1081 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1082 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1083 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1084 memset(&ifam, 0, sizeof(ifam)); 1085 ifam.ifam_index = ifp->if_index; 1086 ifam.ifam_metric = ifa->ifa_metric; 1087 ifam.ifam_flags = ifa->ifa_flags; 1088 m = COMPATNAME(rt_msg1)(ncmd, &info, &ifam, sizeof(ifam)); 1089 if (m == NULL) 1090 continue; 1091 mtod(m, struct ifa_xmsghdr *)->ifam_addrs = 1092 info.rti_addrs; 1093 break; 1094 case cmdpass(RTM_ADD, 2): 1095 case cmdpass(RTM_CHANGE, 2): 1096 case cmdpass(RTM_DELETE, 1): 1097 if (rt == NULL) 1098 continue; 1099 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1100 info.rti_info[RTAX_DST] = sa = rt_getkey(rt); 1101 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1102 memset(&rtm, 0, sizeof(rtm)); 1103 rtm.rtm_index = ifp->if_index; 1104 rtm.rtm_flags |= rt->rt_flags; 1105 rtm.rtm_errno = error; 1106 m = COMPATNAME(rt_msg1)(cmd, &info, &rtm, sizeof(rtm)); 1107 if (m == NULL) 1108 continue; 1109 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1110 break; 1111 default: 1112 continue; 1113 } 1114 #ifdef DIAGNOSTIC 1115 if (m == NULL) 1116 panic("%s: called with wrong command", __func__); 1117 #endif 1118 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1119 } 1120 #undef cmdpass 1121 } 1122 1123 static struct mbuf * 1124 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1125 struct rt_addrinfo *info) 1126 { 1127 struct if_xannouncemsghdr ifan; 1128 1129 memset(info, 0, sizeof(*info)); 1130 memset(&ifan, 0, sizeof(ifan)); 1131 ifan.ifan_index = ifp->if_index; 1132 strlcpy(ifan.ifan_name, ifp->if_xname, sizeof(ifan.ifan_name)); 1133 ifan.ifan_what = what; 1134 return COMPATNAME(rt_msg1)(type, info, &ifan, sizeof(ifan)); 1135 } 1136 1137 /* 1138 * This is called to generate routing socket messages indicating 1139 * network interface arrival and departure. 1140 */ 1141 void 1142 COMPATNAME(rt_ifannouncemsg)(struct ifnet *ifp, int what) 1143 { 1144 struct mbuf *m; 1145 struct rt_addrinfo info; 1146 1147 COMPATCALL(rt_ifannouncemsg, (ifp, what)); 1148 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1149 return; 1150 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); 1151 if (m == NULL) 1152 return; 1153 COMPATNAME(route_enqueue)(m, 0); 1154 } 1155 1156 /* 1157 * This is called to generate routing socket messages indicating 1158 * IEEE80211 wireless events. 1159 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1160 */ 1161 void 1162 COMPATNAME(rt_ieee80211msg)(struct ifnet *ifp, int what, void *data, 1163 size_t data_len) 1164 { 1165 struct mbuf *m; 1166 struct rt_addrinfo info; 1167 1168 COMPATCALL(rt_ieee80211msg, (ifp, what, data, data_len)); 1169 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1170 return; 1171 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1172 if (m == NULL) 1173 return; 1174 /* 1175 * Append the ieee80211 data. Try to stick it in the 1176 * mbuf containing the ifannounce msg; otherwise allocate 1177 * a new mbuf and append. 1178 * 1179 * NB: we assume m is a single mbuf. 1180 */ 1181 if (data_len > M_TRAILINGSPACE(m)) { 1182 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 1183 if (n == NULL) { 1184 m_freem(m); 1185 return; 1186 } 1187 (void)memcpy(mtod(n, void *), data, data_len); 1188 n->m_len = data_len; 1189 m->m_next = n; 1190 } else if (data_len > 0) { 1191 (void)memcpy(mtod(m, uint8_t *) + m->m_len, data, data_len); 1192 m->m_len += data_len; 1193 } 1194 if (m->m_flags & M_PKTHDR) 1195 m->m_pkthdr.len += data_len; 1196 mtod(m, struct if_xannouncemsghdr *)->ifan_msglen += data_len; 1197 COMPATNAME(route_enqueue)(m, 0); 1198 } 1199 1200 /* 1201 * This is used in dumping the kernel table via sysctl(). 1202 */ 1203 static int 1204 sysctl_dumpentry(struct rtentry *rt, void *v) 1205 { 1206 struct rt_walkarg *w = v; 1207 int error = 0, size; 1208 struct rt_addrinfo info; 1209 1210 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1211 return 0; 1212 memset(&info, 0, sizeof(info)); 1213 info.rti_info[RTAX_DST] = rt_getkey(rt); 1214 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1215 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1216 info.rti_info[RTAX_TAG] = rt_gettag(rt); 1217 if (rt->rt_ifp) { 1218 const struct ifaddr *rtifa; 1219 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_dl->ifa_addr; 1220 /* rtifa used to be simply rt->rt_ifa. If rt->rt_ifa != NULL, 1221 * then rt_get_ifa() != NULL. So this ought to still be safe. 1222 * --dyoung 1223 */ 1224 rtifa = rt_get_ifa(rt); 1225 info.rti_info[RTAX_IFA] = rtifa->ifa_addr; 1226 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1227 info.rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 1228 } 1229 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 1230 return error; 1231 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1232 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)w->w_tmem; 1233 1234 rtm->rtm_flags = rt->rt_flags; 1235 rtm->rtm_use = rt->rt_use; 1236 rtm_setmetrics(rt, rtm); 1237 KASSERT(rt->rt_ifp != NULL); 1238 rtm->rtm_index = rt->rt_ifp->if_index; 1239 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1240 rtm->rtm_addrs = info.rti_addrs; 1241 if ((error = copyout(rtm, w->w_where, size)) != 0) 1242 w->w_where = NULL; 1243 else 1244 w->w_where = (char *)w->w_where + size; 1245 } 1246 return error; 1247 } 1248 1249 static int 1250 sysctl_iflist(int af, struct rt_walkarg *w, int type) 1251 { 1252 struct ifnet *ifp; 1253 struct ifaddr *ifa; 1254 struct rt_addrinfo info; 1255 int len, error = 0; 1256 1257 memset(&info, 0, sizeof(info)); 1258 IFNET_FOREACH(ifp) { 1259 if (w->w_arg && w->w_arg != ifp->if_index) 1260 continue; 1261 if (IFADDR_EMPTY(ifp)) 1262 continue; 1263 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1264 switch (type) { 1265 case NET_RT_IFLIST: 1266 error = rt_msg2(RTM_IFINFO, &info, NULL, w, &len); 1267 break; 1268 #ifdef COMPAT_14 1269 case NET_RT_OOIFLIST: 1270 error = rt_msg2(RTM_OOIFINFO, &info, NULL, w, &len); 1271 break; 1272 #endif 1273 #ifdef COMPAT_50 1274 case NET_RT_OIFLIST: 1275 error = rt_msg2(RTM_OIFINFO, &info, NULL, w, &len); 1276 break; 1277 #endif 1278 default: 1279 panic("sysctl_iflist(1)"); 1280 } 1281 if (error) 1282 return error; 1283 info.rti_info[RTAX_IFP] = NULL; 1284 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1285 switch (type) { 1286 case NET_RT_IFLIST: { 1287 struct if_xmsghdr *ifm; 1288 1289 ifm = (struct if_xmsghdr *)w->w_tmem; 1290 ifm->ifm_index = ifp->if_index; 1291 ifm->ifm_flags = ifp->if_flags; 1292 ifm->ifm_data = ifp->if_data; 1293 ifm->ifm_addrs = info.rti_addrs; 1294 error = copyout(ifm, w->w_where, len); 1295 if (error) 1296 return error; 1297 w->w_where = (char *)w->w_where + len; 1298 break; 1299 } 1300 1301 #ifdef COMPAT_14 1302 case NET_RT_OOIFLIST: 1303 error = compat_14_iflist(ifp, w, &info, len); 1304 if (error) 1305 return error; 1306 break; 1307 #endif 1308 #ifdef COMPAT_50 1309 case NET_RT_OIFLIST: 1310 error = compat_50_iflist(ifp, w, &info, len); 1311 if (error) 1312 return error; 1313 break; 1314 #endif 1315 default: 1316 panic("sysctl_iflist(2)"); 1317 } 1318 } 1319 IFADDR_FOREACH(ifa, ifp) { 1320 if (af && af != ifa->ifa_addr->sa_family) 1321 continue; 1322 info.rti_info[RTAX_IFA] = ifa->ifa_addr; 1323 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1324 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1325 if ((error = rt_msg2(RTM_NEWADDR, &info, 0, w, &len))) 1326 return error; 1327 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1328 struct ifa_xmsghdr *ifam; 1329 1330 ifam = (struct ifa_xmsghdr *)w->w_tmem; 1331 ifam->ifam_index = ifa->ifa_ifp->if_index; 1332 ifam->ifam_flags = ifa->ifa_flags; 1333 ifam->ifam_metric = ifa->ifa_metric; 1334 ifam->ifam_addrs = info.rti_addrs; 1335 error = copyout(w->w_tmem, w->w_where, len); 1336 if (error) 1337 return error; 1338 w->w_where = (char *)w->w_where + len; 1339 } 1340 } 1341 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] = 1342 info.rti_info[RTAX_BRD] = NULL; 1343 } 1344 return 0; 1345 } 1346 1347 static int 1348 sysctl_rtable(SYSCTLFN_ARGS) 1349 { 1350 void *where = oldp; 1351 size_t *given = oldlenp; 1352 int i, s, error = EINVAL; 1353 u_char af; 1354 struct rt_walkarg w; 1355 1356 if (namelen == 1 && name[0] == CTL_QUERY) 1357 return sysctl_query(SYSCTLFN_CALL(rnode)); 1358 1359 if (newp) 1360 return EPERM; 1361 if (namelen != 3) 1362 return EINVAL; 1363 af = name[0]; 1364 w.w_tmemneeded = 0; 1365 w.w_tmemsize = 0; 1366 w.w_tmem = NULL; 1367 again: 1368 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 1369 if (w.w_tmemneeded) { 1370 w.w_tmem = malloc(w.w_tmemneeded, M_RTABLE, M_WAITOK); 1371 w.w_tmemsize = w.w_tmemneeded; 1372 w.w_tmemneeded = 0; 1373 } 1374 w.w_op = name[1]; 1375 w.w_arg = name[2]; 1376 w.w_given = *given; 1377 w.w_needed = 0 - w.w_given; 1378 w.w_where = where; 1379 1380 s = splsoftnet(); 1381 switch (w.w_op) { 1382 1383 case NET_RT_DUMP: 1384 case NET_RT_FLAGS: 1385 for (i = 1; i <= AF_MAX; i++) 1386 if ((af == 0 || af == i) && 1387 (error = rt_walktree(i, sysctl_dumpentry, &w))) 1388 break; 1389 break; 1390 1391 #ifdef COMPAT_14 1392 case NET_RT_OOIFLIST: 1393 error = sysctl_iflist(af, &w, w.w_op); 1394 break; 1395 #endif 1396 #ifdef COMPAT_50 1397 case NET_RT_OIFLIST: 1398 error = sysctl_iflist(af, &w, w.w_op); 1399 break; 1400 #endif 1401 case NET_RT_IFLIST: 1402 error = sysctl_iflist(af, &w, w.w_op); 1403 break; 1404 } 1405 splx(s); 1406 1407 /* check to see if we couldn't allocate memory with NOWAIT */ 1408 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 1409 goto again; 1410 1411 if (w.w_tmem) 1412 free(w.w_tmem, M_RTABLE); 1413 w.w_needed += w.w_given; 1414 if (where) { 1415 *given = (char *)w.w_where - (char *)where; 1416 if (*given < w.w_needed) 1417 return ENOMEM; 1418 } else { 1419 *given = (11 * w.w_needed) / 10; 1420 } 1421 return error; 1422 } 1423 1424 /* 1425 * Routing message software interrupt routine 1426 */ 1427 static void 1428 COMPATNAME(route_intr)(void *cookie) 1429 { 1430 struct sockproto proto = { .sp_family = PF_XROUTE, }; 1431 struct route_info * const ri = &COMPATNAME(route_info); 1432 struct mbuf *m; 1433 int s; 1434 1435 mutex_enter(softnet_lock); 1436 KERNEL_LOCK(1, NULL); 1437 while (!IF_IS_EMPTY(&ri->ri_intrq)) { 1438 s = splnet(); 1439 IF_DEQUEUE(&ri->ri_intrq, m); 1440 splx(s); 1441 if (m == NULL) 1442 break; 1443 proto.sp_protocol = M_GETCTX(m, uintptr_t); 1444 raw_input(m, &proto, &ri->ri_src, &ri->ri_dst); 1445 } 1446 KERNEL_UNLOCK_ONE(NULL); 1447 mutex_exit(softnet_lock); 1448 } 1449 1450 /* 1451 * Enqueue a message to the software interrupt routine. 1452 */ 1453 void 1454 COMPATNAME(route_enqueue)(struct mbuf *m, int family) 1455 { 1456 struct route_info * const ri = &COMPATNAME(route_info); 1457 int s, wasempty; 1458 1459 s = splnet(); 1460 if (IF_QFULL(&ri->ri_intrq)) { 1461 IF_DROP(&ri->ri_intrq); 1462 m_freem(m); 1463 } else { 1464 wasempty = IF_IS_EMPTY(&ri->ri_intrq); 1465 M_SETCTX(m, (uintptr_t)family); 1466 IF_ENQUEUE(&ri->ri_intrq, m); 1467 if (wasempty) 1468 softint_schedule(ri->ri_sih); 1469 } 1470 splx(s); 1471 } 1472 1473 static void 1474 COMPATNAME(route_init)(void) 1475 { 1476 struct route_info * const ri = &COMPATNAME(route_info); 1477 1478 #ifndef COMPAT_RTSOCK 1479 rt_init(); 1480 #endif 1481 1482 sysctl_net_route_setup(NULL); 1483 ri->ri_intrq.ifq_maxlen = ri->ri_maxqlen; 1484 ri->ri_sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 1485 COMPATNAME(route_intr), NULL); 1486 } 1487 1488 /* 1489 * Definitions of protocols supported in the ROUTE domain. 1490 */ 1491 #ifndef COMPAT_RTSOCK 1492 PR_WRAP_USRREQS(route); 1493 #else 1494 PR_WRAP_USRREQS(compat_50_route); 1495 #endif 1496 1497 static const struct pr_usrreqs route_usrreqs = { 1498 .pr_attach = COMPATNAME(route_attach_wrapper), 1499 .pr_detach = COMPATNAME(route_detach_wrapper), 1500 .pr_accept = COMPATNAME(route_accept_wrapper), 1501 .pr_bind = COMPATNAME(route_bind_wrapper), 1502 .pr_listen = COMPATNAME(route_listen_wrapper), 1503 .pr_connect = COMPATNAME(route_connect_wrapper), 1504 .pr_connect2 = COMPATNAME(route_connect2_wrapper), 1505 .pr_disconnect = COMPATNAME(route_disconnect_wrapper), 1506 .pr_shutdown = COMPATNAME(route_shutdown_wrapper), 1507 .pr_abort = COMPATNAME(route_abort_wrapper), 1508 .pr_ioctl = COMPATNAME(route_ioctl_wrapper), 1509 .pr_stat = COMPATNAME(route_stat_wrapper), 1510 .pr_peeraddr = COMPATNAME(route_peeraddr_wrapper), 1511 .pr_sockaddr = COMPATNAME(route_sockaddr_wrapper), 1512 .pr_rcvd = COMPATNAME(route_rcvd_wrapper), 1513 .pr_recvoob = COMPATNAME(route_recvoob_wrapper), 1514 .pr_send = COMPATNAME(route_send_wrapper), 1515 .pr_sendoob = COMPATNAME(route_sendoob_wrapper), 1516 .pr_purgeif = COMPATNAME(route_purgeif_wrapper), 1517 }; 1518 1519 static const struct protosw COMPATNAME(route_protosw)[] = { 1520 { 1521 .pr_type = SOCK_RAW, 1522 .pr_domain = &COMPATNAME(routedomain), 1523 .pr_flags = PR_ATOMIC|PR_ADDR, 1524 .pr_input = raw_input, 1525 .pr_output = COMPATNAME(route_output), 1526 .pr_ctlinput = raw_ctlinput, 1527 .pr_usrreqs = &route_usrreqs, 1528 .pr_init = raw_init, 1529 }, 1530 }; 1531 1532 struct domain COMPATNAME(routedomain) = { 1533 .dom_family = PF_XROUTE, 1534 .dom_name = DOMAINNAME, 1535 .dom_init = COMPATNAME(route_init), 1536 .dom_protosw = COMPATNAME(route_protosw), 1537 .dom_protoswNPROTOSW = 1538 &COMPATNAME(route_protosw)[__arraycount(COMPATNAME(route_protosw))], 1539 }; 1540 1541 static void 1542 sysctl_net_route_setup(struct sysctllog **clog) 1543 { 1544 const struct sysctlnode *rnode = NULL; 1545 1546 sysctl_createv(clog, 0, NULL, &rnode, 1547 CTLFLAG_PERMANENT, 1548 CTLTYPE_NODE, DOMAINNAME, 1549 SYSCTL_DESCR("PF_ROUTE information"), 1550 NULL, 0, NULL, 0, 1551 CTL_NET, PF_XROUTE, CTL_EOL); 1552 1553 sysctl_createv(clog, 0, NULL, NULL, 1554 CTLFLAG_PERMANENT, 1555 CTLTYPE_NODE, "rtable", 1556 SYSCTL_DESCR("Routing table information"), 1557 sysctl_rtable, 0, NULL, 0, 1558 CTL_NET, PF_XROUTE, 0 /* any protocol */, CTL_EOL); 1559 1560 sysctl_createv(clog, 0, &rnode, NULL, 1561 CTLFLAG_PERMANENT, 1562 CTLTYPE_STRUCT, "stats", 1563 SYSCTL_DESCR("Routing statistics"), 1564 NULL, 0, &rtstat, sizeof(rtstat), 1565 CTL_CREATE, CTL_EOL); 1566 } 1567
Indexes created Mon Sep 22 21:09:42 GMT 2025