rtsock.c revision 1.159
1 /* $NetBSD: rtsock.c,v 1.159 2014/07/31 03:39:35 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 1.159 2014/07/31 03:39:35 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 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 129 130 #ifndef COMPATCALL 131 #define COMPATCALL(name, args) do { } while (/*CONSTCOND*/ 0) 132 #endif 133 134 struct route_info COMPATNAME(route_info) = { 135 .ri_dst = { .sa_len = 2, .sa_family = PF_XROUTE, }, 136 .ri_src = { .sa_len = 2, .sa_family = PF_XROUTE, }, 137 .ri_maxqlen = IFQ_MAXLEN, 138 }; 139 140 #define PRESERVED_RTF (RTF_UP | RTF_GATEWAY | RTF_HOST | RTF_DONE | RTF_MASK) 141 142 static void COMPATNAME(route_init)(void); 143 static int COMPATNAME(route_output)(struct mbuf *, ...); 144 145 static int rt_msg2(int, struct rt_addrinfo *, void *, struct rt_walkarg *, int *); 146 static int rt_xaddrs(u_char, const char *, const char *, struct rt_addrinfo *); 147 static struct mbuf *rt_makeifannouncemsg(struct ifnet *, int, int, 148 struct rt_addrinfo *); 149 static void rt_setmetrics(int, const struct rt_xmsghdr *, struct rtentry *); 150 static void rtm_setmetrics(const struct rtentry *, struct rt_xmsghdr *); 151 static void sysctl_net_route_setup(struct sysctllog **); 152 static int sysctl_dumpentry(struct rtentry *, void *); 153 static int sysctl_iflist(int, struct rt_walkarg *, int); 154 static int sysctl_rtable(SYSCTLFN_PROTO); 155 static void rt_adjustcount(int, int); 156 157 static void 158 rt_adjustcount(int af, int cnt) 159 { 160 struct route_cb * const cb = &COMPATNAME(route_info).ri_cb; 161 162 cb->any_count += cnt; 163 164 switch (af) { 165 case AF_INET: 166 cb->ip_count += cnt; 167 return; 168 #ifdef INET6 169 case AF_INET6: 170 cb->ip6_count += cnt; 171 return; 172 #endif 173 case AF_MPLS: 174 cb->mpls_count += cnt; 175 return; 176 } 177 } 178 179 static int 180 COMPATNAME(route_attach)(struct socket *so, int proto) 181 { 182 struct rawcb *rp; 183 int s, error; 184 185 KASSERT(sotorawcb(so) == NULL); 186 rp = kmem_zalloc(sizeof(*rp), KM_SLEEP); 187 rp->rcb_len = sizeof(*rp); 188 so->so_pcb = rp; 189 190 s = splsoftnet(); 191 if ((error = raw_attach(so, proto)) == 0) { 192 rt_adjustcount(rp->rcb_proto.sp_protocol, 1); 193 rp->rcb_laddr = &COMPATNAME(route_info).ri_src; 194 rp->rcb_faddr = &COMPATNAME(route_info).ri_dst; 195 } 196 splx(s); 197 198 if (error) { 199 kmem_free(rp, sizeof(*rp)); 200 so->so_pcb = NULL; 201 return error; 202 } 203 204 soisconnected(so); 205 so->so_options |= SO_USELOOPBACK; 206 KASSERT(solocked(so)); 207 208 return error; 209 } 210 211 static void 212 COMPATNAME(route_detach)(struct socket *so) 213 { 214 struct rawcb *rp = sotorawcb(so); 215 int s; 216 217 KASSERT(rp != NULL); 218 KASSERT(solocked(so)); 219 220 s = splsoftnet(); 221 rt_adjustcount(rp->rcb_proto.sp_protocol, -1); 222 raw_detach(so); 223 splx(s); 224 } 225 226 static int 227 COMPATNAME(route_accept)(struct socket *so, struct mbuf *nam) 228 { 229 KASSERT(solocked(so)); 230 231 panic("route_accept"); 232 233 return EOPNOTSUPP; 234 } 235 236 static int 237 COMPATNAME(route_bind)(struct socket *so, struct mbuf *nam) 238 { 239 KASSERT(solocked(so)); 240 241 return EOPNOTSUPP; 242 } 243 244 static int 245 COMPATNAME(route_listen)(struct socket *so) 246 { 247 KASSERT(solocked(so)); 248 249 return EOPNOTSUPP; 250 } 251 252 static int 253 COMPATNAME(route_connect)(struct socket *so, struct mbuf *nam) 254 { 255 KASSERT(solocked(so)); 256 257 return EOPNOTSUPP; 258 } 259 260 static int 261 COMPATNAME(route_disconnect)(struct socket *so) 262 { 263 struct rawcb *rp = sotorawcb(so); 264 int s; 265 266 KASSERT(solocked(so)); 267 KASSERT(rp != NULL); 268 269 s = splsoftnet(); 270 soisdisconnected(so); 271 raw_disconnect(rp); 272 splx(s); 273 274 return 0; 275 } 276 277 static int 278 COMPATNAME(route_shutdown)(struct socket *so) 279 { 280 int s; 281 282 KASSERT(solocked(so)); 283 284 /* 285 * Mark the connection as being incapable of further input. 286 */ 287 s = splsoftnet(); 288 socantsendmore(so); 289 splx(s); 290 return 0; 291 } 292 293 static int 294 COMPATNAME(route_abort)(struct socket *so) 295 { 296 KASSERT(solocked(so)); 297 298 panic("route_abort"); 299 300 return EOPNOTSUPP; 301 } 302 303 static int 304 COMPATNAME(route_ioctl)(struct socket *so, u_long cmd, void *nam, 305 struct ifnet * ifp) 306 { 307 return EOPNOTSUPP; 308 } 309 310 static int 311 COMPATNAME(route_stat)(struct socket *so, struct stat *ub) 312 { 313 KASSERT(solocked(so)); 314 315 return 0; 316 } 317 318 static int 319 COMPATNAME(route_peeraddr)(struct socket *so, struct mbuf *nam) 320 { 321 struct rawcb *rp = sotorawcb(so); 322 323 KASSERT(solocked(so)); 324 KASSERT(rp != NULL); 325 KASSERT(nam != NULL); 326 327 if (rp->rcb_faddr == NULL) 328 return ENOTCONN; 329 330 raw_setpeeraddr(rp, nam); 331 return 0; 332 } 333 334 static int 335 COMPATNAME(route_sockaddr)(struct socket *so, struct mbuf *nam) 336 { 337 struct rawcb *rp = sotorawcb(so); 338 339 KASSERT(solocked(so)); 340 KASSERT(rp != NULL); 341 KASSERT(nam != NULL); 342 343 if (rp->rcb_faddr == NULL) 344 return ENOTCONN; 345 346 raw_setsockaddr(rp, nam); 347 return 0; 348 } 349 350 static int 351 COMPATNAME(route_recvoob)(struct socket *so, struct mbuf *m, int flags) 352 { 353 KASSERT(solocked(so)); 354 355 return EOPNOTSUPP; 356 } 357 358 static int 359 COMPATNAME(route_sendoob)(struct socket *so, struct mbuf *m, 360 struct mbuf *control) 361 { 362 KASSERT(solocked(so)); 363 364 m_freem(m); 365 m_freem(control); 366 367 return EOPNOTSUPP; 368 } 369 370 static int 371 COMPATNAME(route_usrreq)(struct socket *so, int req, struct mbuf *m, 372 struct mbuf *nam, struct mbuf *control, struct lwp *l) 373 { 374 int s, error = 0; 375 376 KASSERT(req != PRU_ATTACH); 377 KASSERT(req != PRU_DETACH); 378 KASSERT(req != PRU_ACCEPT); 379 KASSERT(req != PRU_BIND); 380 KASSERT(req != PRU_LISTEN); 381 KASSERT(req != PRU_CONNECT); 382 KASSERT(req != PRU_DISCONNECT); 383 KASSERT(req != PRU_SHUTDOWN); 384 KASSERT(req != PRU_ABORT); 385 KASSERT(req != PRU_CONTROL); 386 KASSERT(req != PRU_SENSE); 387 KASSERT(req != PRU_PEERADDR); 388 KASSERT(req != PRU_SOCKADDR); 389 KASSERT(req != PRU_RCVOOB); 390 KASSERT(req != PRU_SENDOOB); 391 392 s = splsoftnet(); 393 error = raw_usrreq(so, req, m, nam, control, l); 394 splx(s); 395 396 return error; 397 } 398 399 /*ARGSUSED*/ 400 int 401 COMPATNAME(route_output)(struct mbuf *m, ...) 402 { 403 struct sockproto proto = { .sp_family = PF_XROUTE, }; 404 struct rt_xmsghdr *rtm = NULL; 405 struct rt_xmsghdr *old_rtm = NULL; 406 struct rtentry *rt = NULL; 407 struct rtentry *saved_nrt = NULL; 408 struct rt_addrinfo info; 409 int len, error = 0; 410 struct ifnet *ifp = NULL; 411 struct ifaddr *ifa = NULL; 412 struct socket *so; 413 va_list ap; 414 sa_family_t family; 415 416 va_start(ap, m); 417 so = va_arg(ap, struct socket *); 418 va_end(ap); 419 420 #define senderr(e) do { error = e; goto flush;} while (/*CONSTCOND*/ 0) 421 if (m == NULL || ((m->m_len < sizeof(int32_t)) && 422 (m = m_pullup(m, sizeof(int32_t))) == NULL)) 423 return ENOBUFS; 424 if ((m->m_flags & M_PKTHDR) == 0) 425 panic("%s", __func__); 426 len = m->m_pkthdr.len; 427 if (len < sizeof(*rtm) || 428 len != mtod(m, struct rt_xmsghdr *)->rtm_msglen) { 429 info.rti_info[RTAX_DST] = NULL; 430 senderr(EINVAL); 431 } 432 R_Malloc(rtm, struct rt_xmsghdr *, len); 433 if (rtm == NULL) { 434 info.rti_info[RTAX_DST] = NULL; 435 senderr(ENOBUFS); 436 } 437 m_copydata(m, 0, len, rtm); 438 if (rtm->rtm_version != RTM_XVERSION) { 439 info.rti_info[RTAX_DST] = NULL; 440 senderr(EPROTONOSUPPORT); 441 } 442 rtm->rtm_pid = curproc->p_pid; 443 memset(&info, 0, sizeof(info)); 444 info.rti_addrs = rtm->rtm_addrs; 445 if (rt_xaddrs(rtm->rtm_type, (const char *)(rtm + 1), len + (char *)rtm, 446 &info)) { 447 senderr(EINVAL); 448 } 449 info.rti_flags = rtm->rtm_flags; 450 #ifdef RTSOCK_DEBUG 451 if (info.rti_info[RTAX_DST]->sa_family == AF_INET) { 452 printf("%s: extracted info.rti_info[RTAX_DST] %s\n", __func__, 453 inet_ntoa(((const struct sockaddr_in *) 454 info.rti_info[RTAX_DST])->sin_addr)); 455 } 456 #endif /* RTSOCK_DEBUG */ 457 if (info.rti_info[RTAX_DST] == NULL || 458 (info.rti_info[RTAX_DST]->sa_family >= AF_MAX)) { 459 senderr(EINVAL); 460 } 461 if (info.rti_info[RTAX_GATEWAY] != NULL && 462 (info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) { 463 senderr(EINVAL); 464 } 465 466 /* 467 * Verify that the caller has the appropriate privilege; RTM_GET 468 * is the only operation the non-superuser is allowed. 469 */ 470 if (kauth_authorize_network(curlwp->l_cred, KAUTH_NETWORK_ROUTE, 471 0, rtm, NULL, NULL) != 0) 472 senderr(EACCES); 473 474 switch (rtm->rtm_type) { 475 476 case RTM_ADD: 477 if (info.rti_info[RTAX_GATEWAY] == NULL) { 478 senderr(EINVAL); 479 } 480 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 481 if (error == 0 && saved_nrt) { 482 rt_setmetrics(rtm->rtm_inits, rtm, saved_nrt); 483 saved_nrt->rt_refcnt--; 484 } 485 break; 486 487 case RTM_DELETE: 488 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 489 if (error == 0) { 490 (rt = saved_nrt)->rt_refcnt++; 491 goto report; 492 } 493 break; 494 495 case RTM_GET: 496 case RTM_CHANGE: 497 case RTM_LOCK: 498 /* XXX This will mask info.rti_info[RTAX_DST] with 499 * info.rti_info[RTAX_NETMASK] before 500 * searching. It did not used to do that. --dyoung 501 */ 502 error = rtrequest1(RTM_GET, &info, &rt); 503 if (error != 0) 504 senderr(error); 505 if (rtm->rtm_type != RTM_GET) {/* XXX: too grotty */ 506 if (memcmp(info.rti_info[RTAX_DST], rt_getkey(rt), 507 info.rti_info[RTAX_DST]->sa_len) != 0) 508 senderr(ESRCH); 509 if (info.rti_info[RTAX_NETMASK] == NULL && 510 rt_mask(rt) != NULL) 511 senderr(ETOOMANYREFS); 512 } 513 514 switch (rtm->rtm_type) { 515 case RTM_GET: 516 report: 517 info.rti_info[RTAX_DST] = rt_getkey(rt); 518 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 519 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 520 info.rti_info[RTAX_TAG] = rt_gettag(rt); 521 if ((rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) == 0) 522 ; 523 else if ((ifp = rt->rt_ifp) != NULL) { 524 const struct ifaddr *rtifa; 525 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 526 /* rtifa used to be simply rt->rt_ifa. 527 * If rt->rt_ifa != NULL, then 528 * rt_get_ifa() != NULL. So this 529 * ought to still be safe. --dyoung 530 */ 531 rtifa = rt_get_ifa(rt); 532 info.rti_info[RTAX_IFA] = rtifa->ifa_addr; 533 #ifdef RTSOCK_DEBUG 534 if (info.rti_info[RTAX_IFA]->sa_family == 535 AF_INET) { 536 printf("%s: copying out RTAX_IFA %s ", 537 __func__, inet_ntoa( 538 ((const struct sockaddr_in *) 539 info.rti_info[RTAX_IFA])->sin_addr) 540 ); 541 printf("for info.rti_info[RTAX_DST] %s " 542 "ifa_getifa %p ifa_seqno %p\n", 543 inet_ntoa( 544 ((const struct sockaddr_in *) 545 info.rti_info[RTAX_DST])->sin_addr), 546 (void *)rtifa->ifa_getifa, 547 rtifa->ifa_seqno); 548 } 549 #endif /* RTSOCK_DEBUG */ 550 if (ifp->if_flags & IFF_POINTOPOINT) { 551 info.rti_info[RTAX_BRD] = 552 rtifa->ifa_dstaddr; 553 } else 554 info.rti_info[RTAX_BRD] = NULL; 555 rtm->rtm_index = ifp->if_index; 556 } else { 557 info.rti_info[RTAX_IFP] = NULL; 558 info.rti_info[RTAX_IFA] = NULL; 559 } 560 (void)rt_msg2(rtm->rtm_type, &info, NULL, NULL, &len); 561 if (len > rtm->rtm_msglen) { 562 old_rtm = rtm; 563 R_Malloc(rtm, struct rt_xmsghdr *, len); 564 if (rtm == NULL) 565 senderr(ENOBUFS); 566 (void)memcpy(rtm, old_rtm, old_rtm->rtm_msglen); 567 } 568 (void)rt_msg2(rtm->rtm_type, &info, rtm, NULL, 0); 569 rtm->rtm_flags = rt->rt_flags; 570 rtm_setmetrics(rt, rtm); 571 rtm->rtm_addrs = info.rti_addrs; 572 break; 573 574 case RTM_CHANGE: 575 /* 576 * new gateway could require new ifaddr, ifp; 577 * flags may also be different; ifp may be specified 578 * by ll sockaddr when protocol address is ambiguous 579 */ 580 if ((error = rt_getifa(&info)) != 0) 581 senderr(error); 582 if (info.rti_info[RTAX_GATEWAY] && 583 rt_setgate(rt, info.rti_info[RTAX_GATEWAY])) 584 senderr(EDQUOT); 585 if (info.rti_info[RTAX_TAG]) 586 rt_settag(rt, info.rti_info[RTAX_TAG]); 587 /* new gateway could require new ifaddr, ifp; 588 flags may also be different; ifp may be specified 589 by ll sockaddr when protocol address is ambiguous */ 590 if (info.rti_info[RTAX_IFP] && 591 (ifa = ifa_ifwithnet(info.rti_info[RTAX_IFP])) && 592 (ifp = ifa->ifa_ifp) && (info.rti_info[RTAX_IFA] || 593 info.rti_info[RTAX_GATEWAY])) { 594 if (info.rti_info[RTAX_IFA] == NULL || 595 (ifa = ifa_ifwithaddr( 596 info.rti_info[RTAX_IFA])) == NULL) 597 ifa = ifaof_ifpforaddr( 598 info.rti_info[RTAX_IFA] ? 599 info.rti_info[RTAX_IFA] : 600 info.rti_info[RTAX_GATEWAY], ifp); 601 } else if ((info.rti_info[RTAX_IFA] && 602 (ifa = ifa_ifwithaddr(info.rti_info[RTAX_IFA]))) || 603 (info.rti_info[RTAX_GATEWAY] && 604 (ifa = ifa_ifwithroute(rt->rt_flags, 605 rt_getkey(rt), info.rti_info[RTAX_GATEWAY])))) { 606 ifp = ifa->ifa_ifp; 607 } 608 if (ifa) { 609 struct ifaddr *oifa = rt->rt_ifa; 610 if (oifa != ifa) { 611 if (oifa && oifa->ifa_rtrequest) { 612 oifa->ifa_rtrequest(RTM_DELETE, 613 rt, &info); 614 } 615 rt_replace_ifa(rt, ifa); 616 rt->rt_ifp = ifp; 617 } 618 } 619 if (ifp && rt->rt_ifp != ifp) 620 rt->rt_ifp = ifp; 621 rt_setmetrics(rtm->rtm_inits, rtm, rt); 622 if (rt->rt_flags != info.rti_flags) 623 rt->rt_flags = (info.rti_flags & ~PRESERVED_RTF) 624 | (rt->rt_flags & PRESERVED_RTF); 625 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 626 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info); 627 /*FALLTHROUGH*/ 628 case RTM_LOCK: 629 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 630 rt->rt_rmx.rmx_locks |= 631 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 632 break; 633 } 634 break; 635 636 default: 637 senderr(EOPNOTSUPP); 638 } 639 640 flush: 641 if (rtm) { 642 if (error) 643 rtm->rtm_errno = error; 644 else 645 rtm->rtm_flags |= RTF_DONE; 646 } 647 family = info.rti_info[RTAX_DST] ? info.rti_info[RTAX_DST]->sa_family : 648 0; 649 /* We cannot free old_rtm until we have stopped using the 650 * pointers in info, some of which may point to sockaddrs 651 * in old_rtm. 652 */ 653 if (old_rtm != NULL) 654 Free(old_rtm); 655 if (rt) 656 rtfree(rt); 657 { 658 struct rawcb *rp = NULL; 659 /* 660 * Check to see if we don't want our own messages. 661 */ 662 if ((so->so_options & SO_USELOOPBACK) == 0) { 663 if (COMPATNAME(route_info).ri_cb.any_count <= 1) { 664 if (rtm) 665 Free(rtm); 666 m_freem(m); 667 return error; 668 } 669 /* There is another listener, so construct message */ 670 rp = sotorawcb(so); 671 } 672 if (rtm) { 673 m_copyback(m, 0, rtm->rtm_msglen, rtm); 674 if (m->m_pkthdr.len < rtm->rtm_msglen) { 675 m_freem(m); 676 m = NULL; 677 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 678 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 679 Free(rtm); 680 } 681 if (rp) 682 rp->rcb_proto.sp_family = 0; /* Avoid us */ 683 if (family) 684 proto.sp_protocol = family; 685 if (m) 686 raw_input(m, &proto, &COMPATNAME(route_info).ri_src, 687 &COMPATNAME(route_info).ri_dst); 688 if (rp) 689 rp->rcb_proto.sp_family = PF_XROUTE; 690 } 691 return error; 692 } 693 694 static void 695 rt_setmetrics(int which, const struct rt_xmsghdr *in, struct rtentry *out) 696 { 697 #define metric(f, e) if (which & (f)) out->rt_rmx.e = in->rtm_rmx.e; 698 metric(RTV_RPIPE, rmx_recvpipe); 699 metric(RTV_SPIPE, rmx_sendpipe); 700 metric(RTV_SSTHRESH, rmx_ssthresh); 701 metric(RTV_RTT, rmx_rtt); 702 metric(RTV_RTTVAR, rmx_rttvar); 703 metric(RTV_HOPCOUNT, rmx_hopcount); 704 metric(RTV_MTU, rmx_mtu); 705 metric(RTV_EXPIRE, rmx_expire); 706 #undef metric 707 } 708 709 static void 710 rtm_setmetrics(const struct rtentry *in, struct rt_xmsghdr *out) 711 { 712 #define metric(e) out->rtm_rmx.e = in->rt_rmx.e; 713 metric(rmx_recvpipe); 714 metric(rmx_sendpipe); 715 metric(rmx_ssthresh); 716 metric(rmx_rtt); 717 metric(rmx_rttvar); 718 metric(rmx_hopcount); 719 metric(rmx_mtu); 720 metric(rmx_expire); 721 #undef metric 722 } 723 724 static int 725 rt_xaddrs(u_char rtmtype, const char *cp, const char *cplim, 726 struct rt_addrinfo *rtinfo) 727 { 728 const struct sockaddr *sa = NULL; /* Quell compiler warning */ 729 int i; 730 731 for (i = 0; i < RTAX_MAX && cp < cplim; i++) { 732 if ((rtinfo->rti_addrs & (1 << i)) == 0) 733 continue; 734 rtinfo->rti_info[i] = sa = (const struct sockaddr *)cp; 735 RT_XADVANCE(cp, sa); 736 } 737 738 /* 739 * Check for extra addresses specified, except RTM_GET asking 740 * for interface info. 741 */ 742 if (rtmtype == RTM_GET) { 743 if (((rtinfo->rti_addrs & 744 (~((1 << RTAX_IFP) | (1 << RTAX_IFA)))) & (~0 << i)) != 0) 745 return 1; 746 } else if ((rtinfo->rti_addrs & (~0 << i)) != 0) 747 return 1; 748 /* Check for bad data length. */ 749 if (cp != cplim) { 750 if (i == RTAX_NETMASK + 1 && sa != NULL && 751 cp - RT_XROUNDUP(sa->sa_len) + sa->sa_len == cplim) 752 /* 753 * The last sockaddr was info.rti_info[RTAX_NETMASK]. 754 * We accept this for now for the sake of old 755 * binaries or third party softwares. 756 */ 757 ; 758 else 759 return 1; 760 } 761 return 0; 762 } 763 764 static int 765 rt_getlen(int type) 766 { 767 #ifndef COMPAT_RTSOCK 768 CTASSERT(__alignof(struct ifa_msghdr) >= sizeof(uint64_t)); 769 CTASSERT(__alignof(struct if_msghdr) >= sizeof(uint64_t)); 770 CTASSERT(__alignof(struct if_announcemsghdr) >= sizeof(uint64_t)); 771 CTASSERT(__alignof(struct rt_msghdr) >= sizeof(uint64_t)); 772 #endif 773 774 switch (type) { 775 case RTM_DELADDR: 776 case RTM_NEWADDR: 777 case RTM_CHGADDR: 778 return sizeof(struct ifa_xmsghdr); 779 780 case RTM_OOIFINFO: 781 #ifdef COMPAT_14 782 return sizeof(struct if_msghdr14); 783 #else 784 #ifdef DIAGNOSTIC 785 printf("RTM_OOIFINFO\n"); 786 #endif 787 return -1; 788 #endif 789 case RTM_OIFINFO: 790 #ifdef COMPAT_50 791 return sizeof(struct if_msghdr50); 792 #else 793 #ifdef DIAGNOSTIC 794 printf("RTM_OIFINFO\n"); 795 #endif 796 return -1; 797 #endif 798 799 case RTM_IFINFO: 800 return sizeof(struct if_xmsghdr); 801 802 case RTM_IFANNOUNCE: 803 case RTM_IEEE80211: 804 return sizeof(struct if_xannouncemsghdr); 805 806 default: 807 return sizeof(struct rt_xmsghdr); 808 } 809 } 810 811 812 struct mbuf * 813 COMPATNAME(rt_msg1)(int type, struct rt_addrinfo *rtinfo, void *data, int datalen) 814 { 815 struct rt_xmsghdr *rtm; 816 struct mbuf *m; 817 int i; 818 const struct sockaddr *sa; 819 int len, dlen; 820 821 m = m_gethdr(M_DONTWAIT, MT_DATA); 822 if (m == NULL) 823 return m; 824 MCLAIM(m, &COMPATNAME(routedomain).dom_mowner); 825 826 if ((len = rt_getlen(type)) == -1) 827 goto out; 828 if (len > MHLEN + MLEN) 829 panic("%s: message too long", __func__); 830 else if (len > MHLEN) { 831 m->m_next = m_get(M_DONTWAIT, MT_DATA); 832 if (m->m_next == NULL) 833 goto out; 834 MCLAIM(m->m_next, m->m_owner); 835 m->m_pkthdr.len = len; 836 m->m_len = MHLEN; 837 m->m_next->m_len = len - MHLEN; 838 } else { 839 m->m_pkthdr.len = m->m_len = len; 840 } 841 m->m_pkthdr.rcvif = NULL; 842 m_copyback(m, 0, datalen, data); 843 if (len > datalen) 844 (void)memset(mtod(m, char *) + datalen, 0, len - datalen); 845 rtm = mtod(m, struct rt_xmsghdr *); 846 for (i = 0; i < RTAX_MAX; i++) { 847 if ((sa = rtinfo->rti_info[i]) == NULL) 848 continue; 849 rtinfo->rti_addrs |= (1 << i); 850 dlen = RT_XROUNDUP(sa->sa_len); 851 m_copyback(m, len, sa->sa_len, sa); 852 if (dlen != sa->sa_len) { 853 /* 854 * Up to 6 + 1 nul's since roundup is to 855 * sizeof(uint64_t) (8 bytes) 856 */ 857 m_copyback(m, len + sa->sa_len, 858 dlen - sa->sa_len, "\0\0\0\0\0\0"); 859 } 860 len += dlen; 861 } 862 if (m->m_pkthdr.len != len) 863 goto out; 864 rtm->rtm_msglen = len; 865 rtm->rtm_version = RTM_XVERSION; 866 rtm->rtm_type = type; 867 return m; 868 out: 869 m_freem(m); 870 return NULL; 871 } 872 873 /* 874 * rt_msg2 875 * 876 * fills 'cp' or 'w'.w_tmem with the routing socket message and 877 * returns the length of the message in 'lenp'. 878 * 879 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 880 * the message 881 * otherwise walkarg's w_needed is updated and if the user buffer is 882 * specified and w_needed indicates space exists the information is copied 883 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 884 * if the allocation fails ENOBUFS is returned. 885 */ 886 static int 887 rt_msg2(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 888 int *lenp) 889 { 890 int i; 891 int len, dlen, second_time = 0; 892 char *cp0, *cp = cpv; 893 894 rtinfo->rti_addrs = 0; 895 again: 896 if ((len = rt_getlen(type)) == -1) 897 return EINVAL; 898 899 if ((cp0 = cp) != NULL) 900 cp += len; 901 for (i = 0; i < RTAX_MAX; i++) { 902 const struct sockaddr *sa; 903 904 if ((sa = rtinfo->rti_info[i]) == NULL) 905 continue; 906 rtinfo->rti_addrs |= (1 << i); 907 dlen = RT_XROUNDUP(sa->sa_len); 908 if (cp) { 909 int diff = dlen - sa->sa_len; 910 (void)memcpy(cp, sa, (size_t)sa->sa_len); 911 cp += sa->sa_len; 912 if (diff > 0) { 913 (void)memset(cp, 0, (size_t)diff); 914 cp += diff; 915 } 916 } 917 len += dlen; 918 } 919 if (cp == NULL && w != NULL && !second_time) { 920 struct rt_walkarg *rw = w; 921 922 rw->w_needed += len; 923 if (rw->w_needed <= 0 && rw->w_where) { 924 if (rw->w_tmemsize < len) { 925 if (rw->w_tmem) 926 free(rw->w_tmem, M_RTABLE); 927 rw->w_tmem = malloc(len, M_RTABLE, M_NOWAIT); 928 if (rw->w_tmem) 929 rw->w_tmemsize = len; 930 else 931 rw->w_tmemsize = 0; 932 } 933 if (rw->w_tmem) { 934 cp = rw->w_tmem; 935 second_time = 1; 936 goto again; 937 } else { 938 rw->w_tmemneeded = len; 939 return ENOBUFS; 940 } 941 } 942 } 943 if (cp) { 944 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)cp0; 945 946 rtm->rtm_version = RTM_XVERSION; 947 rtm->rtm_type = type; 948 rtm->rtm_msglen = len; 949 } 950 if (lenp) 951 *lenp = len; 952 return 0; 953 } 954 955 /* 956 * This routine is called to generate a message from the routing 957 * socket indicating that a redirect has occurred, a routing lookup 958 * has failed, or that a protocol has detected timeouts to a particular 959 * destination. 960 */ 961 void 962 COMPATNAME(rt_missmsg)(int type, const struct rt_addrinfo *rtinfo, int flags, 963 int error) 964 { 965 struct rt_xmsghdr rtm; 966 struct mbuf *m; 967 const struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 968 struct rt_addrinfo info = *rtinfo; 969 970 COMPATCALL(rt_missmsg, (type, rtinfo, flags, error)); 971 if (COMPATNAME(route_info).ri_cb.any_count == 0) 972 return; 973 memset(&rtm, 0, sizeof(rtm)); 974 rtm.rtm_flags = RTF_DONE | flags; 975 rtm.rtm_errno = error; 976 m = COMPATNAME(rt_msg1)(type, &info, &rtm, sizeof(rtm)); 977 if (m == NULL) 978 return; 979 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 980 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 981 } 982 983 /* 984 * This routine is called to generate a message from the routing 985 * socket indicating that the status of a network interface has changed. 986 */ 987 void 988 COMPATNAME(rt_ifmsg)(struct ifnet *ifp) 989 { 990 struct if_xmsghdr ifm; 991 struct mbuf *m; 992 struct rt_addrinfo info; 993 994 COMPATCALL(rt_ifmsg, (ifp)); 995 if (COMPATNAME(route_info).ri_cb.any_count == 0) 996 return; 997 (void)memset(&info, 0, sizeof(info)); 998 (void)memset(&ifm, 0, sizeof(ifm)); 999 ifm.ifm_index = ifp->if_index; 1000 ifm.ifm_flags = ifp->if_flags; 1001 ifm.ifm_data = ifp->if_data; 1002 ifm.ifm_addrs = 0; 1003 m = COMPATNAME(rt_msg1)(RTM_IFINFO, &info, &ifm, sizeof(ifm)); 1004 if (m == NULL) 1005 return; 1006 COMPATNAME(route_enqueue)(m, 0); 1007 #ifdef COMPAT_14 1008 compat_14_rt_oifmsg(ifp); 1009 #endif 1010 #ifdef COMPAT_50 1011 compat_50_rt_oifmsg(ifp); 1012 #endif 1013 } 1014 1015 1016 /* 1017 * This is called to generate messages from the routing socket 1018 * indicating a network interface has had addresses associated with it. 1019 * if we ever reverse the logic and replace messages TO the routing 1020 * socket indicate a request to configure interfaces, then it will 1021 * be unnecessary as the routing socket will automatically generate 1022 * copies of it. 1023 */ 1024 void 1025 COMPATNAME(rt_newaddrmsg)(int cmd, struct ifaddr *ifa, int error, 1026 struct rtentry *rt) 1027 { 1028 #define cmdpass(__cmd, __pass) (((__cmd) << 2) | (__pass)) 1029 struct rt_addrinfo info; 1030 const struct sockaddr *sa; 1031 int pass; 1032 struct mbuf *m; 1033 struct ifnet *ifp; 1034 struct rt_xmsghdr rtm; 1035 struct ifa_xmsghdr ifam; 1036 int ncmd; 1037 1038 KASSERT(ifa != NULL); 1039 ifp = ifa->ifa_ifp; 1040 COMPATCALL(rt_newaddrmsg, (cmd, ifa, error, rt)); 1041 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1042 return; 1043 for (pass = 1; pass < 3; pass++) { 1044 memset(&info, 0, sizeof(info)); 1045 switch (cmdpass(cmd, pass)) { 1046 case cmdpass(RTM_ADD, 1): 1047 case cmdpass(RTM_CHANGE, 1): 1048 case cmdpass(RTM_DELETE, 2): 1049 case cmdpass(RTM_NEWADDR, 1): 1050 case cmdpass(RTM_DELADDR, 1): 1051 case cmdpass(RTM_CHGADDR, 1): 1052 switch (cmd) { 1053 case RTM_ADD: 1054 ncmd = RTM_NEWADDR; 1055 break; 1056 case RTM_DELETE: 1057 ncmd = RTM_DELADDR; 1058 break; 1059 case RTM_CHANGE: 1060 ncmd = RTM_CHGADDR; 1061 break; 1062 default: 1063 ncmd = cmd; 1064 } 1065 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; 1066 KASSERT(ifp->if_dl != NULL); 1067 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1068 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1069 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1070 memset(&ifam, 0, sizeof(ifam)); 1071 ifam.ifam_index = ifp->if_index; 1072 ifam.ifam_metric = ifa->ifa_metric; 1073 ifam.ifam_flags = ifa->ifa_flags; 1074 m = COMPATNAME(rt_msg1)(ncmd, &info, &ifam, sizeof(ifam)); 1075 if (m == NULL) 1076 continue; 1077 mtod(m, struct ifa_xmsghdr *)->ifam_addrs = 1078 info.rti_addrs; 1079 break; 1080 case cmdpass(RTM_ADD, 2): 1081 case cmdpass(RTM_CHANGE, 2): 1082 case cmdpass(RTM_DELETE, 1): 1083 if (rt == NULL) 1084 continue; 1085 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1086 info.rti_info[RTAX_DST] = sa = rt_getkey(rt); 1087 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1088 memset(&rtm, 0, sizeof(rtm)); 1089 rtm.rtm_index = ifp->if_index; 1090 rtm.rtm_flags |= rt->rt_flags; 1091 rtm.rtm_errno = error; 1092 m = COMPATNAME(rt_msg1)(cmd, &info, &rtm, sizeof(rtm)); 1093 if (m == NULL) 1094 continue; 1095 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1096 break; 1097 default: 1098 continue; 1099 } 1100 #ifdef DIAGNOSTIC 1101 if (m == NULL) 1102 panic("%s: called with wrong command", __func__); 1103 #endif 1104 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1105 } 1106 #undef cmdpass 1107 } 1108 1109 static struct mbuf * 1110 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1111 struct rt_addrinfo *info) 1112 { 1113 struct if_xannouncemsghdr ifan; 1114 1115 memset(info, 0, sizeof(*info)); 1116 memset(&ifan, 0, sizeof(ifan)); 1117 ifan.ifan_index = ifp->if_index; 1118 strlcpy(ifan.ifan_name, ifp->if_xname, sizeof(ifan.ifan_name)); 1119 ifan.ifan_what = what; 1120 return COMPATNAME(rt_msg1)(type, info, &ifan, sizeof(ifan)); 1121 } 1122 1123 /* 1124 * This is called to generate routing socket messages indicating 1125 * network interface arrival and departure. 1126 */ 1127 void 1128 COMPATNAME(rt_ifannouncemsg)(struct ifnet *ifp, int what) 1129 { 1130 struct mbuf *m; 1131 struct rt_addrinfo info; 1132 1133 COMPATCALL(rt_ifannouncemsg, (ifp, what)); 1134 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1135 return; 1136 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); 1137 if (m == NULL) 1138 return; 1139 COMPATNAME(route_enqueue)(m, 0); 1140 } 1141 1142 /* 1143 * This is called to generate routing socket messages indicating 1144 * IEEE80211 wireless events. 1145 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1146 */ 1147 void 1148 COMPATNAME(rt_ieee80211msg)(struct ifnet *ifp, int what, void *data, 1149 size_t data_len) 1150 { 1151 struct mbuf *m; 1152 struct rt_addrinfo info; 1153 1154 COMPATCALL(rt_ieee80211msg, (ifp, what, data, data_len)); 1155 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1156 return; 1157 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1158 if (m == NULL) 1159 return; 1160 /* 1161 * Append the ieee80211 data. Try to stick it in the 1162 * mbuf containing the ifannounce msg; otherwise allocate 1163 * a new mbuf and append. 1164 * 1165 * NB: we assume m is a single mbuf. 1166 */ 1167 if (data_len > M_TRAILINGSPACE(m)) { 1168 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 1169 if (n == NULL) { 1170 m_freem(m); 1171 return; 1172 } 1173 (void)memcpy(mtod(n, void *), data, data_len); 1174 n->m_len = data_len; 1175 m->m_next = n; 1176 } else if (data_len > 0) { 1177 (void)memcpy(mtod(m, uint8_t *) + m->m_len, data, data_len); 1178 m->m_len += data_len; 1179 } 1180 if (m->m_flags & M_PKTHDR) 1181 m->m_pkthdr.len += data_len; 1182 mtod(m, struct if_xannouncemsghdr *)->ifan_msglen += data_len; 1183 COMPATNAME(route_enqueue)(m, 0); 1184 } 1185 1186 /* 1187 * This is used in dumping the kernel table via sysctl(). 1188 */ 1189 static int 1190 sysctl_dumpentry(struct rtentry *rt, void *v) 1191 { 1192 struct rt_walkarg *w = v; 1193 int error = 0, size; 1194 struct rt_addrinfo info; 1195 1196 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1197 return 0; 1198 memset(&info, 0, sizeof(info)); 1199 info.rti_info[RTAX_DST] = rt_getkey(rt); 1200 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1201 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1202 info.rti_info[RTAX_TAG] = rt_gettag(rt); 1203 if (rt->rt_ifp) { 1204 const struct ifaddr *rtifa; 1205 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_dl->ifa_addr; 1206 /* rtifa used to be simply rt->rt_ifa. If rt->rt_ifa != NULL, 1207 * then rt_get_ifa() != NULL. So this ought to still be safe. 1208 * --dyoung 1209 */ 1210 rtifa = rt_get_ifa(rt); 1211 info.rti_info[RTAX_IFA] = rtifa->ifa_addr; 1212 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1213 info.rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 1214 } 1215 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 1216 return error; 1217 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1218 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)w->w_tmem; 1219 1220 rtm->rtm_flags = rt->rt_flags; 1221 rtm->rtm_use = rt->rt_use; 1222 rtm_setmetrics(rt, rtm); 1223 KASSERT(rt->rt_ifp != NULL); 1224 rtm->rtm_index = rt->rt_ifp->if_index; 1225 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1226 rtm->rtm_addrs = info.rti_addrs; 1227 if ((error = copyout(rtm, w->w_where, size)) != 0) 1228 w->w_where = NULL; 1229 else 1230 w->w_where = (char *)w->w_where + size; 1231 } 1232 return error; 1233 } 1234 1235 static int 1236 sysctl_iflist(int af, struct rt_walkarg *w, int type) 1237 { 1238 struct ifnet *ifp; 1239 struct ifaddr *ifa; 1240 struct rt_addrinfo info; 1241 int len, error = 0; 1242 1243 memset(&info, 0, sizeof(info)); 1244 IFNET_FOREACH(ifp) { 1245 if (w->w_arg && w->w_arg != ifp->if_index) 1246 continue; 1247 if (IFADDR_EMPTY(ifp)) 1248 continue; 1249 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1250 switch (type) { 1251 case NET_RT_IFLIST: 1252 error = rt_msg2(RTM_IFINFO, &info, NULL, w, &len); 1253 break; 1254 #ifdef COMPAT_14 1255 case NET_RT_OOIFLIST: 1256 error = rt_msg2(RTM_OOIFINFO, &info, NULL, w, &len); 1257 break; 1258 #endif 1259 #ifdef COMPAT_50 1260 case NET_RT_OIFLIST: 1261 error = rt_msg2(RTM_OIFINFO, &info, NULL, w, &len); 1262 break; 1263 #endif 1264 default: 1265 panic("sysctl_iflist(1)"); 1266 } 1267 if (error) 1268 return error; 1269 info.rti_info[RTAX_IFP] = NULL; 1270 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1271 switch (type) { 1272 case NET_RT_IFLIST: { 1273 struct if_xmsghdr *ifm; 1274 1275 ifm = (struct if_xmsghdr *)w->w_tmem; 1276 ifm->ifm_index = ifp->if_index; 1277 ifm->ifm_flags = ifp->if_flags; 1278 ifm->ifm_data = ifp->if_data; 1279 ifm->ifm_addrs = info.rti_addrs; 1280 error = copyout(ifm, w->w_where, len); 1281 if (error) 1282 return error; 1283 w->w_where = (char *)w->w_where + len; 1284 break; 1285 } 1286 1287 #ifdef COMPAT_14 1288 case NET_RT_OOIFLIST: 1289 error = compat_14_iflist(ifp, w, &info, len); 1290 if (error) 1291 return error; 1292 break; 1293 #endif 1294 #ifdef COMPAT_50 1295 case NET_RT_OIFLIST: 1296 error = compat_50_iflist(ifp, w, &info, len); 1297 if (error) 1298 return error; 1299 break; 1300 #endif 1301 default: 1302 panic("sysctl_iflist(2)"); 1303 } 1304 } 1305 IFADDR_FOREACH(ifa, ifp) { 1306 if (af && af != ifa->ifa_addr->sa_family) 1307 continue; 1308 info.rti_info[RTAX_IFA] = ifa->ifa_addr; 1309 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1310 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1311 if ((error = rt_msg2(RTM_NEWADDR, &info, 0, w, &len))) 1312 return error; 1313 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1314 struct ifa_xmsghdr *ifam; 1315 1316 ifam = (struct ifa_xmsghdr *)w->w_tmem; 1317 ifam->ifam_index = ifa->ifa_ifp->if_index; 1318 ifam->ifam_flags = ifa->ifa_flags; 1319 ifam->ifam_metric = ifa->ifa_metric; 1320 ifam->ifam_addrs = info.rti_addrs; 1321 error = copyout(w->w_tmem, w->w_where, len); 1322 if (error) 1323 return error; 1324 w->w_where = (char *)w->w_where + len; 1325 } 1326 } 1327 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] = 1328 info.rti_info[RTAX_BRD] = NULL; 1329 } 1330 return 0; 1331 } 1332 1333 static int 1334 sysctl_rtable(SYSCTLFN_ARGS) 1335 { 1336 void *where = oldp; 1337 size_t *given = oldlenp; 1338 const void *new = newp; 1339 int i, s, error = EINVAL; 1340 u_char af; 1341 struct rt_walkarg w; 1342 1343 if (namelen == 1 && name[0] == CTL_QUERY) 1344 return sysctl_query(SYSCTLFN_CALL(rnode)); 1345 1346 if (new) 1347 return EPERM; 1348 if (namelen != 3) 1349 return EINVAL; 1350 af = name[0]; 1351 w.w_tmemneeded = 0; 1352 w.w_tmemsize = 0; 1353 w.w_tmem = NULL; 1354 again: 1355 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 1356 if (w.w_tmemneeded) { 1357 w.w_tmem = malloc(w.w_tmemneeded, M_RTABLE, M_WAITOK); 1358 w.w_tmemsize = w.w_tmemneeded; 1359 w.w_tmemneeded = 0; 1360 } 1361 w.w_op = name[1]; 1362 w.w_arg = name[2]; 1363 w.w_given = *given; 1364 w.w_needed = 0 - w.w_given; 1365 w.w_where = where; 1366 1367 s = splsoftnet(); 1368 switch (w.w_op) { 1369 1370 case NET_RT_DUMP: 1371 case NET_RT_FLAGS: 1372 for (i = 1; i <= AF_MAX; i++) 1373 if ((af == 0 || af == i) && 1374 (error = rt_walktree(i, sysctl_dumpentry, &w))) 1375 break; 1376 break; 1377 1378 #ifdef COMPAT_14 1379 case NET_RT_OOIFLIST: 1380 error = sysctl_iflist(af, &w, w.w_op); 1381 break; 1382 #endif 1383 #ifdef COMPAT_50 1384 case NET_RT_OIFLIST: 1385 error = sysctl_iflist(af, &w, w.w_op); 1386 break; 1387 #endif 1388 case NET_RT_IFLIST: 1389 error = sysctl_iflist(af, &w, w.w_op); 1390 break; 1391 } 1392 splx(s); 1393 1394 /* check to see if we couldn't allocate memory with NOWAIT */ 1395 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 1396 goto again; 1397 1398 if (w.w_tmem) 1399 free(w.w_tmem, M_RTABLE); 1400 w.w_needed += w.w_given; 1401 if (where) { 1402 *given = (char *)w.w_where - (char *)where; 1403 if (*given < w.w_needed) 1404 return ENOMEM; 1405 } else { 1406 *given = (11 * w.w_needed) / 10; 1407 } 1408 return error; 1409 } 1410 1411 /* 1412 * Routing message software interrupt routine 1413 */ 1414 static void 1415 COMPATNAME(route_intr)(void *cookie) 1416 { 1417 struct sockproto proto = { .sp_family = PF_XROUTE, }; 1418 struct route_info * const ri = &COMPATNAME(route_info); 1419 struct mbuf *m; 1420 int s; 1421 1422 mutex_enter(softnet_lock); 1423 KERNEL_LOCK(1, NULL); 1424 while (!IF_IS_EMPTY(&ri->ri_intrq)) { 1425 s = splnet(); 1426 IF_DEQUEUE(&ri->ri_intrq, m); 1427 splx(s); 1428 if (m == NULL) 1429 break; 1430 proto.sp_protocol = M_GETCTX(m, uintptr_t); 1431 raw_input(m, &proto, &ri->ri_src, &ri->ri_dst); 1432 } 1433 KERNEL_UNLOCK_ONE(NULL); 1434 mutex_exit(softnet_lock); 1435 } 1436 1437 /* 1438 * Enqueue a message to the software interrupt routine. 1439 */ 1440 void 1441 COMPATNAME(route_enqueue)(struct mbuf *m, int family) 1442 { 1443 struct route_info * const ri = &COMPATNAME(route_info); 1444 int s, wasempty; 1445 1446 s = splnet(); 1447 if (IF_QFULL(&ri->ri_intrq)) { 1448 IF_DROP(&ri->ri_intrq); 1449 m_freem(m); 1450 } else { 1451 wasempty = IF_IS_EMPTY(&ri->ri_intrq); 1452 M_SETCTX(m, (uintptr_t)family); 1453 IF_ENQUEUE(&ri->ri_intrq, m); 1454 if (wasempty) 1455 softint_schedule(ri->ri_sih); 1456 } 1457 splx(s); 1458 } 1459 1460 static void 1461 COMPATNAME(route_init)(void) 1462 { 1463 struct route_info * const ri = &COMPATNAME(route_info); 1464 1465 #ifndef COMPAT_RTSOCK 1466 rt_init(); 1467 #endif 1468 1469 sysctl_net_route_setup(NULL); 1470 ri->ri_intrq.ifq_maxlen = ri->ri_maxqlen; 1471 ri->ri_sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 1472 COMPATNAME(route_intr), NULL); 1473 } 1474 1475 /* 1476 * Definitions of protocols supported in the ROUTE domain. 1477 */ 1478 #ifndef COMPAT_RTSOCK 1479 PR_WRAP_USRREQS(route); 1480 #else 1481 PR_WRAP_USRREQS(compat_50_route); 1482 #endif 1483 1484 static const struct pr_usrreqs route_usrreqs = { 1485 .pr_attach = COMPATNAME(route_attach_wrapper), 1486 .pr_detach = COMPATNAME(route_detach_wrapper), 1487 .pr_accept = COMPATNAME(route_accept_wrapper), 1488 .pr_bind = COMPATNAME(route_bind_wrapper), 1489 .pr_listen = COMPATNAME(route_listen_wrapper), 1490 .pr_connect = COMPATNAME(route_connect_wrapper), 1491 .pr_disconnect = COMPATNAME(route_disconnect_wrapper), 1492 .pr_shutdown = COMPATNAME(route_shutdown_wrapper), 1493 .pr_abort = COMPATNAME(route_abort_wrapper), 1494 .pr_ioctl = COMPATNAME(route_ioctl_wrapper), 1495 .pr_stat = COMPATNAME(route_stat_wrapper), 1496 .pr_peeraddr = COMPATNAME(route_peeraddr_wrapper), 1497 .pr_sockaddr = COMPATNAME(route_sockaddr_wrapper), 1498 .pr_recvoob = COMPATNAME(route_recvoob_wrapper), 1499 .pr_sendoob = COMPATNAME(route_sendoob_wrapper), 1500 .pr_generic = COMPATNAME(route_usrreq_wrapper), 1501 }; 1502 1503 static const struct protosw COMPATNAME(route_protosw)[] = { 1504 { 1505 .pr_type = SOCK_RAW, 1506 .pr_domain = &COMPATNAME(routedomain), 1507 .pr_flags = PR_ATOMIC|PR_ADDR, 1508 .pr_input = raw_input, 1509 .pr_output = COMPATNAME(route_output), 1510 .pr_ctlinput = raw_ctlinput, 1511 .pr_usrreqs = &route_usrreqs, 1512 .pr_init = raw_init, 1513 }, 1514 }; 1515 1516 struct domain COMPATNAME(routedomain) = { 1517 .dom_family = PF_XROUTE, 1518 .dom_name = DOMAINNAME, 1519 .dom_init = COMPATNAME(route_init), 1520 .dom_protosw = COMPATNAME(route_protosw), 1521 .dom_protoswNPROTOSW = 1522 &COMPATNAME(route_protosw)[__arraycount(COMPATNAME(route_protosw))], 1523 }; 1524 1525 static void 1526 sysctl_net_route_setup(struct sysctllog **clog) 1527 { 1528 const struct sysctlnode *rnode = NULL; 1529 1530 sysctl_createv(clog, 0, NULL, &rnode, 1531 CTLFLAG_PERMANENT, 1532 CTLTYPE_NODE, DOMAINNAME, 1533 SYSCTL_DESCR("PF_ROUTE information"), 1534 NULL, 0, NULL, 0, 1535 CTL_NET, PF_XROUTE, CTL_EOL); 1536 1537 sysctl_createv(clog, 0, NULL, NULL, 1538 CTLFLAG_PERMANENT, 1539 CTLTYPE_NODE, "rtable", 1540 SYSCTL_DESCR("Routing table information"), 1541 sysctl_rtable, 0, NULL, 0, 1542 CTL_NET, PF_XROUTE, 0 /* any protocol */, CTL_EOL); 1543 1544 sysctl_createv(clog, 0, &rnode, NULL, 1545 CTLFLAG_PERMANENT, 1546 CTLTYPE_STRUCT, "stats", 1547 SYSCTL_DESCR("Routing statistics"), 1548 NULL, 0, &rtstat, sizeof(rtstat), 1549 CTL_CREATE, CTL_EOL); 1550 } 1551
Indexes created Mon Sep 22 10:09:38 GMT 2025