rtsock.c revision 1.155
1 /* $NetBSD: rtsock.c,v 1.155 2014/07/09 14:41:42 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 1.155 2014/07/09 14:41:42 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 /* NOT REACHED */ 233 return EOPNOTSUPP; 234 } 235 236 static int 237 COMPATNAME(route_ioctl)(struct socket *so, u_long cmd, void *nam, 238 struct ifnet * ifp) 239 { 240 return EOPNOTSUPP; 241 } 242 243 static int 244 COMPATNAME(route_stat)(struct socket *so, struct stat *ub) 245 { 246 KASSERT(solocked(so)); 247 248 return 0; 249 } 250 251 static int 252 COMPATNAME(route_peeraddr)(struct socket *so, struct mbuf *nam) 253 { 254 struct rawcb *rp = sotorawcb(so); 255 256 KASSERT(solocked(so)); 257 KASSERT(rp != NULL); 258 KASSERT(nam != NULL); 259 260 if (rp->rcb_faddr == NULL) 261 return ENOTCONN; 262 263 raw_setpeeraddr(rp, nam); 264 return 0; 265 } 266 267 static int 268 COMPATNAME(route_sockaddr)(struct socket *so, struct mbuf *nam) 269 { 270 struct rawcb *rp = sotorawcb(so); 271 272 KASSERT(solocked(so)); 273 KASSERT(rp != NULL); 274 KASSERT(nam != NULL); 275 276 if (rp->rcb_faddr == NULL) 277 return ENOTCONN; 278 279 raw_setsockaddr(rp, nam); 280 return 0; 281 } 282 283 static int 284 COMPATNAME(route_usrreq)(struct socket *so, int req, struct mbuf *m, 285 struct mbuf *nam, struct mbuf *control, struct lwp *l) 286 { 287 int s, error = 0; 288 289 KASSERT(req != PRU_ATTACH); 290 KASSERT(req != PRU_DETACH); 291 KASSERT(req != PRU_ACCEPT); 292 KASSERT(req != PRU_CONTROL); 293 KASSERT(req != PRU_SENSE); 294 KASSERT(req != PRU_PEERADDR); 295 KASSERT(req != PRU_SOCKADDR); 296 297 s = splsoftnet(); 298 error = raw_usrreq(so, req, m, nam, control, l); 299 splx(s); 300 301 return error; 302 } 303 304 /*ARGSUSED*/ 305 int 306 COMPATNAME(route_output)(struct mbuf *m, ...) 307 { 308 struct sockproto proto = { .sp_family = PF_XROUTE, }; 309 struct rt_xmsghdr *rtm = NULL; 310 struct rt_xmsghdr *old_rtm = NULL; 311 struct rtentry *rt = NULL; 312 struct rtentry *saved_nrt = NULL; 313 struct rt_addrinfo info; 314 int len, error = 0; 315 struct ifnet *ifp = NULL; 316 struct ifaddr *ifa = NULL; 317 struct socket *so; 318 va_list ap; 319 sa_family_t family; 320 321 va_start(ap, m); 322 so = va_arg(ap, struct socket *); 323 va_end(ap); 324 325 #define senderr(e) do { error = e; goto flush;} while (/*CONSTCOND*/ 0) 326 if (m == NULL || ((m->m_len < sizeof(int32_t)) && 327 (m = m_pullup(m, sizeof(int32_t))) == NULL)) 328 return ENOBUFS; 329 if ((m->m_flags & M_PKTHDR) == 0) 330 panic("%s", __func__); 331 len = m->m_pkthdr.len; 332 if (len < sizeof(*rtm) || 333 len != mtod(m, struct rt_xmsghdr *)->rtm_msglen) { 334 info.rti_info[RTAX_DST] = NULL; 335 senderr(EINVAL); 336 } 337 R_Malloc(rtm, struct rt_xmsghdr *, len); 338 if (rtm == NULL) { 339 info.rti_info[RTAX_DST] = NULL; 340 senderr(ENOBUFS); 341 } 342 m_copydata(m, 0, len, rtm); 343 if (rtm->rtm_version != RTM_XVERSION) { 344 info.rti_info[RTAX_DST] = NULL; 345 senderr(EPROTONOSUPPORT); 346 } 347 rtm->rtm_pid = curproc->p_pid; 348 memset(&info, 0, sizeof(info)); 349 info.rti_addrs = rtm->rtm_addrs; 350 if (rt_xaddrs(rtm->rtm_type, (const char *)(rtm + 1), len + (char *)rtm, 351 &info)) { 352 senderr(EINVAL); 353 } 354 info.rti_flags = rtm->rtm_flags; 355 #ifdef RTSOCK_DEBUG 356 if (info.rti_info[RTAX_DST]->sa_family == AF_INET) { 357 printf("%s: extracted info.rti_info[RTAX_DST] %s\n", __func__, 358 inet_ntoa(((const struct sockaddr_in *) 359 info.rti_info[RTAX_DST])->sin_addr)); 360 } 361 #endif /* RTSOCK_DEBUG */ 362 if (info.rti_info[RTAX_DST] == NULL || 363 (info.rti_info[RTAX_DST]->sa_family >= AF_MAX)) { 364 senderr(EINVAL); 365 } 366 if (info.rti_info[RTAX_GATEWAY] != NULL && 367 (info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) { 368 senderr(EINVAL); 369 } 370 371 /* 372 * Verify that the caller has the appropriate privilege; RTM_GET 373 * is the only operation the non-superuser is allowed. 374 */ 375 if (kauth_authorize_network(curlwp->l_cred, KAUTH_NETWORK_ROUTE, 376 0, rtm, NULL, NULL) != 0) 377 senderr(EACCES); 378 379 switch (rtm->rtm_type) { 380 381 case RTM_ADD: 382 if (info.rti_info[RTAX_GATEWAY] == NULL) { 383 senderr(EINVAL); 384 } 385 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 386 if (error == 0 && saved_nrt) { 387 rt_setmetrics(rtm->rtm_inits, rtm, saved_nrt); 388 saved_nrt->rt_refcnt--; 389 } 390 break; 391 392 case RTM_DELETE: 393 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 394 if (error == 0) { 395 (rt = saved_nrt)->rt_refcnt++; 396 goto report; 397 } 398 break; 399 400 case RTM_GET: 401 case RTM_CHANGE: 402 case RTM_LOCK: 403 /* XXX This will mask info.rti_info[RTAX_DST] with 404 * info.rti_info[RTAX_NETMASK] before 405 * searching. It did not used to do that. --dyoung 406 */ 407 error = rtrequest1(RTM_GET, &info, &rt); 408 if (error != 0) 409 senderr(error); 410 if (rtm->rtm_type != RTM_GET) {/* XXX: too grotty */ 411 if (memcmp(info.rti_info[RTAX_DST], rt_getkey(rt), 412 info.rti_info[RTAX_DST]->sa_len) != 0) 413 senderr(ESRCH); 414 if (info.rti_info[RTAX_NETMASK] == NULL && 415 rt_mask(rt) != NULL) 416 senderr(ETOOMANYREFS); 417 } 418 419 switch (rtm->rtm_type) { 420 case RTM_GET: 421 report: 422 info.rti_info[RTAX_DST] = rt_getkey(rt); 423 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 424 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 425 info.rti_info[RTAX_TAG] = rt_gettag(rt); 426 if ((rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) == 0) 427 ; 428 else if ((ifp = rt->rt_ifp) != NULL) { 429 const struct ifaddr *rtifa; 430 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 431 /* rtifa used to be simply rt->rt_ifa. 432 * If rt->rt_ifa != NULL, then 433 * rt_get_ifa() != NULL. So this 434 * ought to still be safe. --dyoung 435 */ 436 rtifa = rt_get_ifa(rt); 437 info.rti_info[RTAX_IFA] = rtifa->ifa_addr; 438 #ifdef RTSOCK_DEBUG 439 if (info.rti_info[RTAX_IFA]->sa_family == 440 AF_INET) { 441 printf("%s: copying out RTAX_IFA %s ", 442 __func__, inet_ntoa( 443 ((const struct sockaddr_in *) 444 info.rti_info[RTAX_IFA])->sin_addr) 445 ); 446 printf("for info.rti_info[RTAX_DST] %s " 447 "ifa_getifa %p ifa_seqno %p\n", 448 inet_ntoa( 449 ((const struct sockaddr_in *) 450 info.rti_info[RTAX_DST])->sin_addr), 451 (void *)rtifa->ifa_getifa, 452 rtifa->ifa_seqno); 453 } 454 #endif /* RTSOCK_DEBUG */ 455 if (ifp->if_flags & IFF_POINTOPOINT) { 456 info.rti_info[RTAX_BRD] = 457 rtifa->ifa_dstaddr; 458 } else 459 info.rti_info[RTAX_BRD] = NULL; 460 rtm->rtm_index = ifp->if_index; 461 } else { 462 info.rti_info[RTAX_IFP] = NULL; 463 info.rti_info[RTAX_IFA] = NULL; 464 } 465 (void)rt_msg2(rtm->rtm_type, &info, NULL, NULL, &len); 466 if (len > rtm->rtm_msglen) { 467 old_rtm = rtm; 468 R_Malloc(rtm, struct rt_xmsghdr *, len); 469 if (rtm == NULL) 470 senderr(ENOBUFS); 471 (void)memcpy(rtm, old_rtm, old_rtm->rtm_msglen); 472 } 473 (void)rt_msg2(rtm->rtm_type, &info, rtm, NULL, 0); 474 rtm->rtm_flags = rt->rt_flags; 475 rtm_setmetrics(rt, rtm); 476 rtm->rtm_addrs = info.rti_addrs; 477 break; 478 479 case RTM_CHANGE: 480 /* 481 * new gateway could require new ifaddr, ifp; 482 * flags may also be different; ifp may be specified 483 * by ll sockaddr when protocol address is ambiguous 484 */ 485 if ((error = rt_getifa(&info)) != 0) 486 senderr(error); 487 if (info.rti_info[RTAX_GATEWAY] && 488 rt_setgate(rt, info.rti_info[RTAX_GATEWAY])) 489 senderr(EDQUOT); 490 if (info.rti_info[RTAX_TAG]) 491 rt_settag(rt, info.rti_info[RTAX_TAG]); 492 /* new gateway could require new ifaddr, ifp; 493 flags may also be different; ifp may be specified 494 by ll sockaddr when protocol address is ambiguous */ 495 if (info.rti_info[RTAX_IFP] && 496 (ifa = ifa_ifwithnet(info.rti_info[RTAX_IFP])) && 497 (ifp = ifa->ifa_ifp) && (info.rti_info[RTAX_IFA] || 498 info.rti_info[RTAX_GATEWAY])) { 499 if (info.rti_info[RTAX_IFA] == NULL || 500 (ifa = ifa_ifwithaddr( 501 info.rti_info[RTAX_IFA])) == NULL) 502 ifa = ifaof_ifpforaddr( 503 info.rti_info[RTAX_IFA] ? 504 info.rti_info[RTAX_IFA] : 505 info.rti_info[RTAX_GATEWAY], ifp); 506 } else if ((info.rti_info[RTAX_IFA] && 507 (ifa = ifa_ifwithaddr(info.rti_info[RTAX_IFA]))) || 508 (info.rti_info[RTAX_GATEWAY] && 509 (ifa = ifa_ifwithroute(rt->rt_flags, 510 rt_getkey(rt), info.rti_info[RTAX_GATEWAY])))) { 511 ifp = ifa->ifa_ifp; 512 } 513 if (ifa) { 514 struct ifaddr *oifa = rt->rt_ifa; 515 if (oifa != ifa) { 516 if (oifa && oifa->ifa_rtrequest) { 517 oifa->ifa_rtrequest(RTM_DELETE, 518 rt, &info); 519 } 520 rt_replace_ifa(rt, ifa); 521 rt->rt_ifp = ifp; 522 } 523 } 524 if (ifp && rt->rt_ifp != ifp) 525 rt->rt_ifp = ifp; 526 rt_setmetrics(rtm->rtm_inits, rtm, rt); 527 if (rt->rt_flags != info.rti_flags) 528 rt->rt_flags = (info.rti_flags & ~PRESERVED_RTF) 529 | (rt->rt_flags & PRESERVED_RTF); 530 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 531 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info); 532 /*FALLTHROUGH*/ 533 case RTM_LOCK: 534 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 535 rt->rt_rmx.rmx_locks |= 536 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 537 break; 538 } 539 break; 540 541 default: 542 senderr(EOPNOTSUPP); 543 } 544 545 flush: 546 if (rtm) { 547 if (error) 548 rtm->rtm_errno = error; 549 else 550 rtm->rtm_flags |= RTF_DONE; 551 } 552 family = info.rti_info[RTAX_DST] ? info.rti_info[RTAX_DST]->sa_family : 553 0; 554 /* We cannot free old_rtm until we have stopped using the 555 * pointers in info, some of which may point to sockaddrs 556 * in old_rtm. 557 */ 558 if (old_rtm != NULL) 559 Free(old_rtm); 560 if (rt) 561 rtfree(rt); 562 { 563 struct rawcb *rp = NULL; 564 /* 565 * Check to see if we don't want our own messages. 566 */ 567 if ((so->so_options & SO_USELOOPBACK) == 0) { 568 if (COMPATNAME(route_info).ri_cb.any_count <= 1) { 569 if (rtm) 570 Free(rtm); 571 m_freem(m); 572 return error; 573 } 574 /* There is another listener, so construct message */ 575 rp = sotorawcb(so); 576 } 577 if (rtm) { 578 m_copyback(m, 0, rtm->rtm_msglen, rtm); 579 if (m->m_pkthdr.len < rtm->rtm_msglen) { 580 m_freem(m); 581 m = NULL; 582 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 583 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 584 Free(rtm); 585 } 586 if (rp) 587 rp->rcb_proto.sp_family = 0; /* Avoid us */ 588 if (family) 589 proto.sp_protocol = family; 590 if (m) 591 raw_input(m, &proto, &COMPATNAME(route_info).ri_src, 592 &COMPATNAME(route_info).ri_dst); 593 if (rp) 594 rp->rcb_proto.sp_family = PF_XROUTE; 595 } 596 return error; 597 } 598 599 static void 600 rt_setmetrics(int which, const struct rt_xmsghdr *in, struct rtentry *out) 601 { 602 #define metric(f, e) if (which & (f)) out->rt_rmx.e = in->rtm_rmx.e; 603 metric(RTV_RPIPE, rmx_recvpipe); 604 metric(RTV_SPIPE, rmx_sendpipe); 605 metric(RTV_SSTHRESH, rmx_ssthresh); 606 metric(RTV_RTT, rmx_rtt); 607 metric(RTV_RTTVAR, rmx_rttvar); 608 metric(RTV_HOPCOUNT, rmx_hopcount); 609 metric(RTV_MTU, rmx_mtu); 610 metric(RTV_EXPIRE, rmx_expire); 611 #undef metric 612 } 613 614 static void 615 rtm_setmetrics(const struct rtentry *in, struct rt_xmsghdr *out) 616 { 617 #define metric(e) out->rtm_rmx.e = in->rt_rmx.e; 618 metric(rmx_recvpipe); 619 metric(rmx_sendpipe); 620 metric(rmx_ssthresh); 621 metric(rmx_rtt); 622 metric(rmx_rttvar); 623 metric(rmx_hopcount); 624 metric(rmx_mtu); 625 metric(rmx_expire); 626 #undef metric 627 } 628 629 static int 630 rt_xaddrs(u_char rtmtype, const char *cp, const char *cplim, 631 struct rt_addrinfo *rtinfo) 632 { 633 const struct sockaddr *sa = NULL; /* Quell compiler warning */ 634 int i; 635 636 for (i = 0; i < RTAX_MAX && cp < cplim; i++) { 637 if ((rtinfo->rti_addrs & (1 << i)) == 0) 638 continue; 639 rtinfo->rti_info[i] = sa = (const struct sockaddr *)cp; 640 RT_XADVANCE(cp, sa); 641 } 642 643 /* 644 * Check for extra addresses specified, except RTM_GET asking 645 * for interface info. 646 */ 647 if (rtmtype == RTM_GET) { 648 if (((rtinfo->rti_addrs & 649 (~((1 << RTAX_IFP) | (1 << RTAX_IFA)))) & (~0 << i)) != 0) 650 return 1; 651 } else if ((rtinfo->rti_addrs & (~0 << i)) != 0) 652 return 1; 653 /* Check for bad data length. */ 654 if (cp != cplim) { 655 if (i == RTAX_NETMASK + 1 && sa != NULL && 656 cp - RT_XROUNDUP(sa->sa_len) + sa->sa_len == cplim) 657 /* 658 * The last sockaddr was info.rti_info[RTAX_NETMASK]. 659 * We accept this for now for the sake of old 660 * binaries or third party softwares. 661 */ 662 ; 663 else 664 return 1; 665 } 666 return 0; 667 } 668 669 static int 670 rt_getlen(int type) 671 { 672 #ifndef COMPAT_RTSOCK 673 CTASSERT(__alignof(struct ifa_msghdr) >= sizeof(uint64_t)); 674 CTASSERT(__alignof(struct if_msghdr) >= sizeof(uint64_t)); 675 CTASSERT(__alignof(struct if_announcemsghdr) >= sizeof(uint64_t)); 676 CTASSERT(__alignof(struct rt_msghdr) >= sizeof(uint64_t)); 677 #endif 678 679 switch (type) { 680 case RTM_DELADDR: 681 case RTM_NEWADDR: 682 case RTM_CHGADDR: 683 return sizeof(struct ifa_xmsghdr); 684 685 case RTM_OOIFINFO: 686 #ifdef COMPAT_14 687 return sizeof(struct if_msghdr14); 688 #else 689 #ifdef DIAGNOSTIC 690 printf("RTM_OOIFINFO\n"); 691 #endif 692 return -1; 693 #endif 694 case RTM_OIFINFO: 695 #ifdef COMPAT_50 696 return sizeof(struct if_msghdr50); 697 #else 698 #ifdef DIAGNOSTIC 699 printf("RTM_OIFINFO\n"); 700 #endif 701 return -1; 702 #endif 703 704 case RTM_IFINFO: 705 return sizeof(struct if_xmsghdr); 706 707 case RTM_IFANNOUNCE: 708 case RTM_IEEE80211: 709 return sizeof(struct if_xannouncemsghdr); 710 711 default: 712 return sizeof(struct rt_xmsghdr); 713 } 714 } 715 716 717 struct mbuf * 718 COMPATNAME(rt_msg1)(int type, struct rt_addrinfo *rtinfo, void *data, int datalen) 719 { 720 struct rt_xmsghdr *rtm; 721 struct mbuf *m; 722 int i; 723 const struct sockaddr *sa; 724 int len, dlen; 725 726 m = m_gethdr(M_DONTWAIT, MT_DATA); 727 if (m == NULL) 728 return m; 729 MCLAIM(m, &COMPATNAME(routedomain).dom_mowner); 730 731 if ((len = rt_getlen(type)) == -1) 732 goto out; 733 if (len > MHLEN + MLEN) 734 panic("%s: message too long", __func__); 735 else if (len > MHLEN) { 736 m->m_next = m_get(M_DONTWAIT, MT_DATA); 737 if (m->m_next == NULL) 738 goto out; 739 MCLAIM(m->m_next, m->m_owner); 740 m->m_pkthdr.len = len; 741 m->m_len = MHLEN; 742 m->m_next->m_len = len - MHLEN; 743 } else { 744 m->m_pkthdr.len = m->m_len = len; 745 } 746 m->m_pkthdr.rcvif = NULL; 747 m_copyback(m, 0, datalen, data); 748 if (len > datalen) 749 (void)memset(mtod(m, char *) + datalen, 0, len - datalen); 750 rtm = mtod(m, struct rt_xmsghdr *); 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 = RT_XROUNDUP(sa->sa_len); 756 m_copyback(m, len, sa->sa_len, sa); 757 if (dlen != sa->sa_len) { 758 /* 759 * Up to 6 + 1 nul's since roundup is to 760 * sizeof(uint64_t) (8 bytes) 761 */ 762 m_copyback(m, len + sa->sa_len, 763 dlen - sa->sa_len, "\0\0\0\0\0\0"); 764 } 765 len += dlen; 766 } 767 if (m->m_pkthdr.len != len) 768 goto out; 769 rtm->rtm_msglen = len; 770 rtm->rtm_version = RTM_XVERSION; 771 rtm->rtm_type = type; 772 return m; 773 out: 774 m_freem(m); 775 return NULL; 776 } 777 778 /* 779 * rt_msg2 780 * 781 * fills 'cp' or 'w'.w_tmem with the routing socket message and 782 * returns the length of the message in 'lenp'. 783 * 784 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 785 * the message 786 * otherwise walkarg's w_needed is updated and if the user buffer is 787 * specified and w_needed indicates space exists the information is copied 788 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 789 * if the allocation fails ENOBUFS is returned. 790 */ 791 static int 792 rt_msg2(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 793 int *lenp) 794 { 795 int i; 796 int len, dlen, second_time = 0; 797 char *cp0, *cp = cpv; 798 799 rtinfo->rti_addrs = 0; 800 again: 801 if ((len = rt_getlen(type)) == -1) 802 return EINVAL; 803 804 if ((cp0 = cp) != NULL) 805 cp += len; 806 for (i = 0; i < RTAX_MAX; i++) { 807 const struct sockaddr *sa; 808 809 if ((sa = rtinfo->rti_info[i]) == NULL) 810 continue; 811 rtinfo->rti_addrs |= (1 << i); 812 dlen = RT_XROUNDUP(sa->sa_len); 813 if (cp) { 814 int diff = dlen - sa->sa_len; 815 (void)memcpy(cp, sa, (size_t)sa->sa_len); 816 cp += sa->sa_len; 817 if (diff > 0) { 818 (void)memset(cp, 0, (size_t)diff); 819 cp += diff; 820 } 821 } 822 len += dlen; 823 } 824 if (cp == NULL && w != NULL && !second_time) { 825 struct rt_walkarg *rw = w; 826 827 rw->w_needed += len; 828 if (rw->w_needed <= 0 && rw->w_where) { 829 if (rw->w_tmemsize < len) { 830 if (rw->w_tmem) 831 free(rw->w_tmem, M_RTABLE); 832 rw->w_tmem = malloc(len, M_RTABLE, M_NOWAIT); 833 if (rw->w_tmem) 834 rw->w_tmemsize = len; 835 else 836 rw->w_tmemsize = 0; 837 } 838 if (rw->w_tmem) { 839 cp = rw->w_tmem; 840 second_time = 1; 841 goto again; 842 } else { 843 rw->w_tmemneeded = len; 844 return ENOBUFS; 845 } 846 } 847 } 848 if (cp) { 849 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)cp0; 850 851 rtm->rtm_version = RTM_XVERSION; 852 rtm->rtm_type = type; 853 rtm->rtm_msglen = len; 854 } 855 if (lenp) 856 *lenp = len; 857 return 0; 858 } 859 860 /* 861 * This routine is called to generate a message from the routing 862 * socket indicating that a redirect has occurred, a routing lookup 863 * has failed, or that a protocol has detected timeouts to a particular 864 * destination. 865 */ 866 void 867 COMPATNAME(rt_missmsg)(int type, const struct rt_addrinfo *rtinfo, int flags, 868 int error) 869 { 870 struct rt_xmsghdr rtm; 871 struct mbuf *m; 872 const struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 873 struct rt_addrinfo info = *rtinfo; 874 875 COMPATCALL(rt_missmsg, (type, rtinfo, flags, error)); 876 if (COMPATNAME(route_info).ri_cb.any_count == 0) 877 return; 878 memset(&rtm, 0, sizeof(rtm)); 879 rtm.rtm_flags = RTF_DONE | flags; 880 rtm.rtm_errno = error; 881 m = COMPATNAME(rt_msg1)(type, &info, &rtm, sizeof(rtm)); 882 if (m == NULL) 883 return; 884 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 885 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 886 } 887 888 /* 889 * This routine is called to generate a message from the routing 890 * socket indicating that the status of a network interface has changed. 891 */ 892 void 893 COMPATNAME(rt_ifmsg)(struct ifnet *ifp) 894 { 895 struct if_xmsghdr ifm; 896 struct mbuf *m; 897 struct rt_addrinfo info; 898 899 COMPATCALL(rt_ifmsg, (ifp)); 900 if (COMPATNAME(route_info).ri_cb.any_count == 0) 901 return; 902 (void)memset(&info, 0, sizeof(info)); 903 (void)memset(&ifm, 0, sizeof(ifm)); 904 ifm.ifm_index = ifp->if_index; 905 ifm.ifm_flags = ifp->if_flags; 906 ifm.ifm_data = ifp->if_data; 907 ifm.ifm_addrs = 0; 908 m = COMPATNAME(rt_msg1)(RTM_IFINFO, &info, &ifm, sizeof(ifm)); 909 if (m == NULL) 910 return; 911 COMPATNAME(route_enqueue)(m, 0); 912 #ifdef COMPAT_14 913 compat_14_rt_oifmsg(ifp); 914 #endif 915 #ifdef COMPAT_50 916 compat_50_rt_oifmsg(ifp); 917 #endif 918 } 919 920 921 /* 922 * This is called to generate messages from the routing socket 923 * indicating a network interface has had addresses associated with it. 924 * if we ever reverse the logic and replace messages TO the routing 925 * socket indicate a request to configure interfaces, then it will 926 * be unnecessary as the routing socket will automatically generate 927 * copies of it. 928 */ 929 void 930 COMPATNAME(rt_newaddrmsg)(int cmd, struct ifaddr *ifa, int error, 931 struct rtentry *rt) 932 { 933 #define cmdpass(__cmd, __pass) (((__cmd) << 2) | (__pass)) 934 struct rt_addrinfo info; 935 const struct sockaddr *sa; 936 int pass; 937 struct mbuf *m; 938 struct ifnet *ifp; 939 struct rt_xmsghdr rtm; 940 struct ifa_xmsghdr ifam; 941 int ncmd; 942 943 KASSERT(ifa != NULL); 944 ifp = ifa->ifa_ifp; 945 COMPATCALL(rt_newaddrmsg, (cmd, ifa, error, rt)); 946 if (COMPATNAME(route_info).ri_cb.any_count == 0) 947 return; 948 for (pass = 1; pass < 3; pass++) { 949 memset(&info, 0, sizeof(info)); 950 switch (cmdpass(cmd, pass)) { 951 case cmdpass(RTM_ADD, 1): 952 case cmdpass(RTM_CHANGE, 1): 953 case cmdpass(RTM_DELETE, 2): 954 case cmdpass(RTM_NEWADDR, 1): 955 case cmdpass(RTM_DELADDR, 1): 956 case cmdpass(RTM_CHGADDR, 1): 957 switch (cmd) { 958 case RTM_ADD: 959 ncmd = RTM_NEWADDR; 960 break; 961 case RTM_DELETE: 962 ncmd = RTM_DELADDR; 963 break; 964 case RTM_CHANGE: 965 ncmd = RTM_CHGADDR; 966 break; 967 default: 968 ncmd = cmd; 969 } 970 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; 971 KASSERT(ifp->if_dl != NULL); 972 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 973 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 974 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 975 memset(&ifam, 0, sizeof(ifam)); 976 ifam.ifam_index = ifp->if_index; 977 ifam.ifam_metric = ifa->ifa_metric; 978 ifam.ifam_flags = ifa->ifa_flags; 979 m = COMPATNAME(rt_msg1)(ncmd, &info, &ifam, sizeof(ifam)); 980 if (m == NULL) 981 continue; 982 mtod(m, struct ifa_xmsghdr *)->ifam_addrs = 983 info.rti_addrs; 984 break; 985 case cmdpass(RTM_ADD, 2): 986 case cmdpass(RTM_CHANGE, 2): 987 case cmdpass(RTM_DELETE, 1): 988 if (rt == NULL) 989 continue; 990 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 991 info.rti_info[RTAX_DST] = sa = rt_getkey(rt); 992 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 993 memset(&rtm, 0, sizeof(rtm)); 994 rtm.rtm_index = ifp->if_index; 995 rtm.rtm_flags |= rt->rt_flags; 996 rtm.rtm_errno = error; 997 m = COMPATNAME(rt_msg1)(cmd, &info, &rtm, sizeof(rtm)); 998 if (m == NULL) 999 continue; 1000 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1001 break; 1002 default: 1003 continue; 1004 } 1005 #ifdef DIAGNOSTIC 1006 if (m == NULL) 1007 panic("%s: called with wrong command", __func__); 1008 #endif 1009 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1010 } 1011 #undef cmdpass 1012 } 1013 1014 static struct mbuf * 1015 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1016 struct rt_addrinfo *info) 1017 { 1018 struct if_xannouncemsghdr ifan; 1019 1020 memset(info, 0, sizeof(*info)); 1021 memset(&ifan, 0, sizeof(ifan)); 1022 ifan.ifan_index = ifp->if_index; 1023 strlcpy(ifan.ifan_name, ifp->if_xname, sizeof(ifan.ifan_name)); 1024 ifan.ifan_what = what; 1025 return COMPATNAME(rt_msg1)(type, info, &ifan, sizeof(ifan)); 1026 } 1027 1028 /* 1029 * This is called to generate routing socket messages indicating 1030 * network interface arrival and departure. 1031 */ 1032 void 1033 COMPATNAME(rt_ifannouncemsg)(struct ifnet *ifp, int what) 1034 { 1035 struct mbuf *m; 1036 struct rt_addrinfo info; 1037 1038 COMPATCALL(rt_ifannouncemsg, (ifp, what)); 1039 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1040 return; 1041 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); 1042 if (m == NULL) 1043 return; 1044 COMPATNAME(route_enqueue)(m, 0); 1045 } 1046 1047 /* 1048 * This is called to generate routing socket messages indicating 1049 * IEEE80211 wireless events. 1050 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1051 */ 1052 void 1053 COMPATNAME(rt_ieee80211msg)(struct ifnet *ifp, int what, void *data, 1054 size_t data_len) 1055 { 1056 struct mbuf *m; 1057 struct rt_addrinfo info; 1058 1059 COMPATCALL(rt_ieee80211msg, (ifp, what, data, data_len)); 1060 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1061 return; 1062 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1063 if (m == NULL) 1064 return; 1065 /* 1066 * Append the ieee80211 data. Try to stick it in the 1067 * mbuf containing the ifannounce msg; otherwise allocate 1068 * a new mbuf and append. 1069 * 1070 * NB: we assume m is a single mbuf. 1071 */ 1072 if (data_len > M_TRAILINGSPACE(m)) { 1073 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 1074 if (n == NULL) { 1075 m_freem(m); 1076 return; 1077 } 1078 (void)memcpy(mtod(n, void *), data, data_len); 1079 n->m_len = data_len; 1080 m->m_next = n; 1081 } else if (data_len > 0) { 1082 (void)memcpy(mtod(m, uint8_t *) + m->m_len, data, data_len); 1083 m->m_len += data_len; 1084 } 1085 if (m->m_flags & M_PKTHDR) 1086 m->m_pkthdr.len += data_len; 1087 mtod(m, struct if_xannouncemsghdr *)->ifan_msglen += data_len; 1088 COMPATNAME(route_enqueue)(m, 0); 1089 } 1090 1091 /* 1092 * This is used in dumping the kernel table via sysctl(). 1093 */ 1094 static int 1095 sysctl_dumpentry(struct rtentry *rt, void *v) 1096 { 1097 struct rt_walkarg *w = v; 1098 int error = 0, size; 1099 struct rt_addrinfo info; 1100 1101 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1102 return 0; 1103 memset(&info, 0, sizeof(info)); 1104 info.rti_info[RTAX_DST] = rt_getkey(rt); 1105 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1106 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1107 info.rti_info[RTAX_TAG] = rt_gettag(rt); 1108 if (rt->rt_ifp) { 1109 const struct ifaddr *rtifa; 1110 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_dl->ifa_addr; 1111 /* rtifa used to be simply rt->rt_ifa. If rt->rt_ifa != NULL, 1112 * then rt_get_ifa() != NULL. So this ought to still be safe. 1113 * --dyoung 1114 */ 1115 rtifa = rt_get_ifa(rt); 1116 info.rti_info[RTAX_IFA] = rtifa->ifa_addr; 1117 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1118 info.rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 1119 } 1120 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 1121 return error; 1122 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1123 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)w->w_tmem; 1124 1125 rtm->rtm_flags = rt->rt_flags; 1126 rtm->rtm_use = rt->rt_use; 1127 rtm_setmetrics(rt, rtm); 1128 KASSERT(rt->rt_ifp != NULL); 1129 rtm->rtm_index = rt->rt_ifp->if_index; 1130 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1131 rtm->rtm_addrs = info.rti_addrs; 1132 if ((error = copyout(rtm, w->w_where, size)) != 0) 1133 w->w_where = NULL; 1134 else 1135 w->w_where = (char *)w->w_where + size; 1136 } 1137 return error; 1138 } 1139 1140 static int 1141 sysctl_iflist(int af, struct rt_walkarg *w, int type) 1142 { 1143 struct ifnet *ifp; 1144 struct ifaddr *ifa; 1145 struct rt_addrinfo info; 1146 int len, error = 0; 1147 1148 memset(&info, 0, sizeof(info)); 1149 IFNET_FOREACH(ifp) { 1150 if (w->w_arg && w->w_arg != ifp->if_index) 1151 continue; 1152 if (IFADDR_EMPTY(ifp)) 1153 continue; 1154 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1155 switch (type) { 1156 case NET_RT_IFLIST: 1157 error = rt_msg2(RTM_IFINFO, &info, NULL, w, &len); 1158 break; 1159 #ifdef COMPAT_14 1160 case NET_RT_OOIFLIST: 1161 error = rt_msg2(RTM_OOIFINFO, &info, NULL, w, &len); 1162 break; 1163 #endif 1164 #ifdef COMPAT_50 1165 case NET_RT_OIFLIST: 1166 error = rt_msg2(RTM_OIFINFO, &info, NULL, w, &len); 1167 break; 1168 #endif 1169 default: 1170 panic("sysctl_iflist(1)"); 1171 } 1172 if (error) 1173 return error; 1174 info.rti_info[RTAX_IFP] = NULL; 1175 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1176 switch (type) { 1177 case NET_RT_IFLIST: { 1178 struct if_xmsghdr *ifm; 1179 1180 ifm = (struct if_xmsghdr *)w->w_tmem; 1181 ifm->ifm_index = ifp->if_index; 1182 ifm->ifm_flags = ifp->if_flags; 1183 ifm->ifm_data = ifp->if_data; 1184 ifm->ifm_addrs = info.rti_addrs; 1185 error = copyout(ifm, w->w_where, len); 1186 if (error) 1187 return error; 1188 w->w_where = (char *)w->w_where + len; 1189 break; 1190 } 1191 1192 #ifdef COMPAT_14 1193 case NET_RT_OOIFLIST: 1194 error = compat_14_iflist(ifp, w, &info, len); 1195 if (error) 1196 return error; 1197 break; 1198 #endif 1199 #ifdef COMPAT_50 1200 case NET_RT_OIFLIST: 1201 error = compat_50_iflist(ifp, w, &info, len); 1202 if (error) 1203 return error; 1204 break; 1205 #endif 1206 default: 1207 panic("sysctl_iflist(2)"); 1208 } 1209 } 1210 IFADDR_FOREACH(ifa, ifp) { 1211 if (af && af != ifa->ifa_addr->sa_family) 1212 continue; 1213 info.rti_info[RTAX_IFA] = ifa->ifa_addr; 1214 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1215 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1216 if ((error = rt_msg2(RTM_NEWADDR, &info, 0, w, &len))) 1217 return error; 1218 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1219 struct ifa_xmsghdr *ifam; 1220 1221 ifam = (struct ifa_xmsghdr *)w->w_tmem; 1222 ifam->ifam_index = ifa->ifa_ifp->if_index; 1223 ifam->ifam_flags = ifa->ifa_flags; 1224 ifam->ifam_metric = ifa->ifa_metric; 1225 ifam->ifam_addrs = info.rti_addrs; 1226 error = copyout(w->w_tmem, w->w_where, len); 1227 if (error) 1228 return error; 1229 w->w_where = (char *)w->w_where + len; 1230 } 1231 } 1232 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] = 1233 info.rti_info[RTAX_BRD] = NULL; 1234 } 1235 return 0; 1236 } 1237 1238 static int 1239 sysctl_rtable(SYSCTLFN_ARGS) 1240 { 1241 void *where = oldp; 1242 size_t *given = oldlenp; 1243 const void *new = newp; 1244 int i, s, error = EINVAL; 1245 u_char af; 1246 struct rt_walkarg w; 1247 1248 if (namelen == 1 && name[0] == CTL_QUERY) 1249 return sysctl_query(SYSCTLFN_CALL(rnode)); 1250 1251 if (new) 1252 return EPERM; 1253 if (namelen != 3) 1254 return EINVAL; 1255 af = name[0]; 1256 w.w_tmemneeded = 0; 1257 w.w_tmemsize = 0; 1258 w.w_tmem = NULL; 1259 again: 1260 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 1261 if (w.w_tmemneeded) { 1262 w.w_tmem = malloc(w.w_tmemneeded, M_RTABLE, M_WAITOK); 1263 w.w_tmemsize = w.w_tmemneeded; 1264 w.w_tmemneeded = 0; 1265 } 1266 w.w_op = name[1]; 1267 w.w_arg = name[2]; 1268 w.w_given = *given; 1269 w.w_needed = 0 - w.w_given; 1270 w.w_where = where; 1271 1272 s = splsoftnet(); 1273 switch (w.w_op) { 1274 1275 case NET_RT_DUMP: 1276 case NET_RT_FLAGS: 1277 for (i = 1; i <= AF_MAX; i++) 1278 if ((af == 0 || af == i) && 1279 (error = rt_walktree(i, sysctl_dumpentry, &w))) 1280 break; 1281 break; 1282 1283 #ifdef COMPAT_14 1284 case NET_RT_OOIFLIST: 1285 error = sysctl_iflist(af, &w, w.w_op); 1286 break; 1287 #endif 1288 #ifdef COMPAT_50 1289 case NET_RT_OIFLIST: 1290 error = sysctl_iflist(af, &w, w.w_op); 1291 break; 1292 #endif 1293 case NET_RT_IFLIST: 1294 error = sysctl_iflist(af, &w, w.w_op); 1295 break; 1296 } 1297 splx(s); 1298 1299 /* check to see if we couldn't allocate memory with NOWAIT */ 1300 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 1301 goto again; 1302 1303 if (w.w_tmem) 1304 free(w.w_tmem, M_RTABLE); 1305 w.w_needed += w.w_given; 1306 if (where) { 1307 *given = (char *)w.w_where - (char *)where; 1308 if (*given < w.w_needed) 1309 return ENOMEM; 1310 } else { 1311 *given = (11 * w.w_needed) / 10; 1312 } 1313 return error; 1314 } 1315 1316 /* 1317 * Routing message software interrupt routine 1318 */ 1319 static void 1320 COMPATNAME(route_intr)(void *cookie) 1321 { 1322 struct sockproto proto = { .sp_family = PF_XROUTE, }; 1323 struct route_info * const ri = &COMPATNAME(route_info); 1324 struct mbuf *m; 1325 int s; 1326 1327 mutex_enter(softnet_lock); 1328 KERNEL_LOCK(1, NULL); 1329 while (!IF_IS_EMPTY(&ri->ri_intrq)) { 1330 s = splnet(); 1331 IF_DEQUEUE(&ri->ri_intrq, m); 1332 splx(s); 1333 if (m == NULL) 1334 break; 1335 proto.sp_protocol = M_GETCTX(m, uintptr_t); 1336 raw_input(m, &proto, &ri->ri_src, &ri->ri_dst); 1337 } 1338 KERNEL_UNLOCK_ONE(NULL); 1339 mutex_exit(softnet_lock); 1340 } 1341 1342 /* 1343 * Enqueue a message to the software interrupt routine. 1344 */ 1345 void 1346 COMPATNAME(route_enqueue)(struct mbuf *m, int family) 1347 { 1348 struct route_info * const ri = &COMPATNAME(route_info); 1349 int s, wasempty; 1350 1351 s = splnet(); 1352 if (IF_QFULL(&ri->ri_intrq)) { 1353 IF_DROP(&ri->ri_intrq); 1354 m_freem(m); 1355 } else { 1356 wasempty = IF_IS_EMPTY(&ri->ri_intrq); 1357 M_SETCTX(m, (uintptr_t)family); 1358 IF_ENQUEUE(&ri->ri_intrq, m); 1359 if (wasempty) 1360 softint_schedule(ri->ri_sih); 1361 } 1362 splx(s); 1363 } 1364 1365 static void 1366 COMPATNAME(route_init)(void) 1367 { 1368 struct route_info * const ri = &COMPATNAME(route_info); 1369 1370 #ifndef COMPAT_RTSOCK 1371 rt_init(); 1372 #endif 1373 1374 sysctl_net_route_setup(NULL); 1375 ri->ri_intrq.ifq_maxlen = ri->ri_maxqlen; 1376 ri->ri_sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 1377 COMPATNAME(route_intr), NULL); 1378 } 1379 1380 /* 1381 * Definitions of protocols supported in the ROUTE domain. 1382 */ 1383 #ifndef COMPAT_RTSOCK 1384 PR_WRAP_USRREQS(route); 1385 #else 1386 PR_WRAP_USRREQS(compat_50_route); 1387 #endif 1388 1389 static const struct pr_usrreqs route_usrreqs = { 1390 .pr_attach = COMPATNAME(route_attach_wrapper), 1391 .pr_detach = COMPATNAME(route_detach_wrapper), 1392 .pr_accept = COMPATNAME(route_accept_wrapper), 1393 .pr_ioctl = COMPATNAME(route_ioctl_wrapper), 1394 .pr_stat = COMPATNAME(route_stat_wrapper), 1395 .pr_peeraddr = COMPATNAME(route_peeraddr_wrapper), 1396 .pr_sockaddr = COMPATNAME(route_sockaddr_wrapper), 1397 .pr_generic = COMPATNAME(route_usrreq_wrapper), 1398 }; 1399 1400 static const struct protosw COMPATNAME(route_protosw)[] = { 1401 { 1402 .pr_type = SOCK_RAW, 1403 .pr_domain = &COMPATNAME(routedomain), 1404 .pr_flags = PR_ATOMIC|PR_ADDR, 1405 .pr_input = raw_input, 1406 .pr_output = COMPATNAME(route_output), 1407 .pr_ctlinput = raw_ctlinput, 1408 .pr_usrreqs = &route_usrreqs, 1409 .pr_init = raw_init, 1410 }, 1411 }; 1412 1413 struct domain COMPATNAME(routedomain) = { 1414 .dom_family = PF_XROUTE, 1415 .dom_name = DOMAINNAME, 1416 .dom_init = COMPATNAME(route_init), 1417 .dom_protosw = COMPATNAME(route_protosw), 1418 .dom_protoswNPROTOSW = 1419 &COMPATNAME(route_protosw)[__arraycount(COMPATNAME(route_protosw))], 1420 }; 1421 1422 static void 1423 sysctl_net_route_setup(struct sysctllog **clog) 1424 { 1425 const struct sysctlnode *rnode = NULL; 1426 1427 sysctl_createv(clog, 0, NULL, &rnode, 1428 CTLFLAG_PERMANENT, 1429 CTLTYPE_NODE, DOMAINNAME, 1430 SYSCTL_DESCR("PF_ROUTE information"), 1431 NULL, 0, NULL, 0, 1432 CTL_NET, PF_XROUTE, CTL_EOL); 1433 1434 sysctl_createv(clog, 0, NULL, NULL, 1435 CTLFLAG_PERMANENT, 1436 CTLTYPE_NODE, "rtable", 1437 SYSCTL_DESCR("Routing table information"), 1438 sysctl_rtable, 0, NULL, 0, 1439 CTL_NET, PF_XROUTE, 0 /* any protocol */, CTL_EOL); 1440 1441 sysctl_createv(clog, 0, &rnode, NULL, 1442 CTLFLAG_PERMANENT, 1443 CTLTYPE_STRUCT, "stats", 1444 SYSCTL_DESCR("Routing statistics"), 1445 NULL, 0, &rtstat, sizeof(rtstat), 1446 CTL_CREATE, CTL_EOL); 1447 } 1448
Indexes created Tue Sep 23 14:10:03 GMT 2025