rtsock.c revision 1.154
1 /* $NetBSD: rtsock.c,v 1.154 2014/07/09 04:54:03 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 1.154 2014/07/09 04:54:03 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 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_ioctl)(struct socket *so, u_long cmd, void *nam, 228 struct ifnet * ifp) 229 { 230 return EOPNOTSUPP; 231 } 232 233 static int 234 COMPATNAME(route_stat)(struct socket *so, struct stat *ub) 235 { 236 KASSERT(solocked(so)); 237 238 return 0; 239 } 240 241 static int 242 COMPATNAME(route_peeraddr)(struct socket *so, struct mbuf *nam) 243 { 244 struct rawcb *rp = sotorawcb(so); 245 246 KASSERT(solocked(so)); 247 KASSERT(rp != NULL); 248 KASSERT(nam != NULL); 249 250 if (rp->rcb_faddr == NULL) 251 return ENOTCONN; 252 253 raw_setpeeraddr(rp, nam); 254 return 0; 255 } 256 257 static int 258 COMPATNAME(route_sockaddr)(struct socket *so, struct mbuf *nam) 259 { 260 struct rawcb *rp = sotorawcb(so); 261 262 KASSERT(solocked(so)); 263 KASSERT(rp != NULL); 264 KASSERT(nam != NULL); 265 266 if (rp->rcb_faddr == NULL) 267 return ENOTCONN; 268 269 raw_setsockaddr(rp, nam); 270 return 0; 271 } 272 273 static int 274 COMPATNAME(route_usrreq)(struct socket *so, int req, struct mbuf *m, 275 struct mbuf *nam, struct mbuf *control, struct lwp *l) 276 { 277 int s, error = 0; 278 279 KASSERT(req != PRU_ATTACH); 280 KASSERT(req != PRU_DETACH); 281 KASSERT(req != PRU_CONTROL); 282 KASSERT(req != PRU_SENSE); 283 KASSERT(req != PRU_PEERADDR); 284 KASSERT(req != PRU_SOCKADDR); 285 286 s = splsoftnet(); 287 error = raw_usrreq(so, req, m, nam, control, l); 288 splx(s); 289 290 return error; 291 } 292 293 /*ARGSUSED*/ 294 int 295 COMPATNAME(route_output)(struct mbuf *m, ...) 296 { 297 struct sockproto proto = { .sp_family = PF_XROUTE, }; 298 struct rt_xmsghdr *rtm = NULL; 299 struct rt_xmsghdr *old_rtm = NULL; 300 struct rtentry *rt = NULL; 301 struct rtentry *saved_nrt = NULL; 302 struct rt_addrinfo info; 303 int len, error = 0; 304 struct ifnet *ifp = NULL; 305 struct ifaddr *ifa = NULL; 306 struct socket *so; 307 va_list ap; 308 sa_family_t family; 309 310 va_start(ap, m); 311 so = va_arg(ap, struct socket *); 312 va_end(ap); 313 314 #define senderr(e) do { error = e; goto flush;} while (/*CONSTCOND*/ 0) 315 if (m == NULL || ((m->m_len < sizeof(int32_t)) && 316 (m = m_pullup(m, sizeof(int32_t))) == NULL)) 317 return ENOBUFS; 318 if ((m->m_flags & M_PKTHDR) == 0) 319 panic("%s", __func__); 320 len = m->m_pkthdr.len; 321 if (len < sizeof(*rtm) || 322 len != mtod(m, struct rt_xmsghdr *)->rtm_msglen) { 323 info.rti_info[RTAX_DST] = NULL; 324 senderr(EINVAL); 325 } 326 R_Malloc(rtm, struct rt_xmsghdr *, len); 327 if (rtm == NULL) { 328 info.rti_info[RTAX_DST] = NULL; 329 senderr(ENOBUFS); 330 } 331 m_copydata(m, 0, len, rtm); 332 if (rtm->rtm_version != RTM_XVERSION) { 333 info.rti_info[RTAX_DST] = NULL; 334 senderr(EPROTONOSUPPORT); 335 } 336 rtm->rtm_pid = curproc->p_pid; 337 memset(&info, 0, sizeof(info)); 338 info.rti_addrs = rtm->rtm_addrs; 339 if (rt_xaddrs(rtm->rtm_type, (const char *)(rtm + 1), len + (char *)rtm, 340 &info)) { 341 senderr(EINVAL); 342 } 343 info.rti_flags = rtm->rtm_flags; 344 #ifdef RTSOCK_DEBUG 345 if (info.rti_info[RTAX_DST]->sa_family == AF_INET) { 346 printf("%s: extracted info.rti_info[RTAX_DST] %s\n", __func__, 347 inet_ntoa(((const struct sockaddr_in *) 348 info.rti_info[RTAX_DST])->sin_addr)); 349 } 350 #endif /* RTSOCK_DEBUG */ 351 if (info.rti_info[RTAX_DST] == NULL || 352 (info.rti_info[RTAX_DST]->sa_family >= AF_MAX)) { 353 senderr(EINVAL); 354 } 355 if (info.rti_info[RTAX_GATEWAY] != NULL && 356 (info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) { 357 senderr(EINVAL); 358 } 359 360 /* 361 * Verify that the caller has the appropriate privilege; RTM_GET 362 * is the only operation the non-superuser is allowed. 363 */ 364 if (kauth_authorize_network(curlwp->l_cred, KAUTH_NETWORK_ROUTE, 365 0, rtm, NULL, NULL) != 0) 366 senderr(EACCES); 367 368 switch (rtm->rtm_type) { 369 370 case RTM_ADD: 371 if (info.rti_info[RTAX_GATEWAY] == NULL) { 372 senderr(EINVAL); 373 } 374 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 375 if (error == 0 && saved_nrt) { 376 rt_setmetrics(rtm->rtm_inits, rtm, saved_nrt); 377 saved_nrt->rt_refcnt--; 378 } 379 break; 380 381 case RTM_DELETE: 382 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 383 if (error == 0) { 384 (rt = saved_nrt)->rt_refcnt++; 385 goto report; 386 } 387 break; 388 389 case RTM_GET: 390 case RTM_CHANGE: 391 case RTM_LOCK: 392 /* XXX This will mask info.rti_info[RTAX_DST] with 393 * info.rti_info[RTAX_NETMASK] before 394 * searching. It did not used to do that. --dyoung 395 */ 396 error = rtrequest1(RTM_GET, &info, &rt); 397 if (error != 0) 398 senderr(error); 399 if (rtm->rtm_type != RTM_GET) {/* XXX: too grotty */ 400 if (memcmp(info.rti_info[RTAX_DST], rt_getkey(rt), 401 info.rti_info[RTAX_DST]->sa_len) != 0) 402 senderr(ESRCH); 403 if (info.rti_info[RTAX_NETMASK] == NULL && 404 rt_mask(rt) != NULL) 405 senderr(ETOOMANYREFS); 406 } 407 408 switch (rtm->rtm_type) { 409 case RTM_GET: 410 report: 411 info.rti_info[RTAX_DST] = rt_getkey(rt); 412 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 413 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 414 info.rti_info[RTAX_TAG] = rt_gettag(rt); 415 if ((rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) == 0) 416 ; 417 else if ((ifp = rt->rt_ifp) != NULL) { 418 const struct ifaddr *rtifa; 419 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 420 /* rtifa used to be simply rt->rt_ifa. 421 * If rt->rt_ifa != NULL, then 422 * rt_get_ifa() != NULL. So this 423 * ought to still be safe. --dyoung 424 */ 425 rtifa = rt_get_ifa(rt); 426 info.rti_info[RTAX_IFA] = rtifa->ifa_addr; 427 #ifdef RTSOCK_DEBUG 428 if (info.rti_info[RTAX_IFA]->sa_family == 429 AF_INET) { 430 printf("%s: copying out RTAX_IFA %s ", 431 __func__, inet_ntoa( 432 ((const struct sockaddr_in *) 433 info.rti_info[RTAX_IFA])->sin_addr) 434 ); 435 printf("for info.rti_info[RTAX_DST] %s " 436 "ifa_getifa %p ifa_seqno %p\n", 437 inet_ntoa( 438 ((const struct sockaddr_in *) 439 info.rti_info[RTAX_DST])->sin_addr), 440 (void *)rtifa->ifa_getifa, 441 rtifa->ifa_seqno); 442 } 443 #endif /* RTSOCK_DEBUG */ 444 if (ifp->if_flags & IFF_POINTOPOINT) { 445 info.rti_info[RTAX_BRD] = 446 rtifa->ifa_dstaddr; 447 } else 448 info.rti_info[RTAX_BRD] = NULL; 449 rtm->rtm_index = ifp->if_index; 450 } else { 451 info.rti_info[RTAX_IFP] = NULL; 452 info.rti_info[RTAX_IFA] = NULL; 453 } 454 (void)rt_msg2(rtm->rtm_type, &info, NULL, NULL, &len); 455 if (len > rtm->rtm_msglen) { 456 old_rtm = rtm; 457 R_Malloc(rtm, struct rt_xmsghdr *, len); 458 if (rtm == NULL) 459 senderr(ENOBUFS); 460 (void)memcpy(rtm, old_rtm, old_rtm->rtm_msglen); 461 } 462 (void)rt_msg2(rtm->rtm_type, &info, rtm, NULL, 0); 463 rtm->rtm_flags = rt->rt_flags; 464 rtm_setmetrics(rt, rtm); 465 rtm->rtm_addrs = info.rti_addrs; 466 break; 467 468 case RTM_CHANGE: 469 /* 470 * new gateway could require new ifaddr, ifp; 471 * flags may also be different; ifp may be specified 472 * by ll sockaddr when protocol address is ambiguous 473 */ 474 if ((error = rt_getifa(&info)) != 0) 475 senderr(error); 476 if (info.rti_info[RTAX_GATEWAY] && 477 rt_setgate(rt, info.rti_info[RTAX_GATEWAY])) 478 senderr(EDQUOT); 479 if (info.rti_info[RTAX_TAG]) 480 rt_settag(rt, info.rti_info[RTAX_TAG]); 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 if (info.rti_info[RTAX_IFP] && 485 (ifa = ifa_ifwithnet(info.rti_info[RTAX_IFP])) && 486 (ifp = ifa->ifa_ifp) && (info.rti_info[RTAX_IFA] || 487 info.rti_info[RTAX_GATEWAY])) { 488 if (info.rti_info[RTAX_IFA] == NULL || 489 (ifa = ifa_ifwithaddr( 490 info.rti_info[RTAX_IFA])) == NULL) 491 ifa = ifaof_ifpforaddr( 492 info.rti_info[RTAX_IFA] ? 493 info.rti_info[RTAX_IFA] : 494 info.rti_info[RTAX_GATEWAY], ifp); 495 } else if ((info.rti_info[RTAX_IFA] && 496 (ifa = ifa_ifwithaddr(info.rti_info[RTAX_IFA]))) || 497 (info.rti_info[RTAX_GATEWAY] && 498 (ifa = ifa_ifwithroute(rt->rt_flags, 499 rt_getkey(rt), info.rti_info[RTAX_GATEWAY])))) { 500 ifp = ifa->ifa_ifp; 501 } 502 if (ifa) { 503 struct ifaddr *oifa = rt->rt_ifa; 504 if (oifa != ifa) { 505 if (oifa && oifa->ifa_rtrequest) { 506 oifa->ifa_rtrequest(RTM_DELETE, 507 rt, &info); 508 } 509 rt_replace_ifa(rt, ifa); 510 rt->rt_ifp = ifp; 511 } 512 } 513 if (ifp && rt->rt_ifp != ifp) 514 rt->rt_ifp = ifp; 515 rt_setmetrics(rtm->rtm_inits, rtm, rt); 516 if (rt->rt_flags != info.rti_flags) 517 rt->rt_flags = (info.rti_flags & ~PRESERVED_RTF) 518 | (rt->rt_flags & PRESERVED_RTF); 519 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 520 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info); 521 /*FALLTHROUGH*/ 522 case RTM_LOCK: 523 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 524 rt->rt_rmx.rmx_locks |= 525 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 526 break; 527 } 528 break; 529 530 default: 531 senderr(EOPNOTSUPP); 532 } 533 534 flush: 535 if (rtm) { 536 if (error) 537 rtm->rtm_errno = error; 538 else 539 rtm->rtm_flags |= RTF_DONE; 540 } 541 family = info.rti_info[RTAX_DST] ? info.rti_info[RTAX_DST]->sa_family : 542 0; 543 /* We cannot free old_rtm until we have stopped using the 544 * pointers in info, some of which may point to sockaddrs 545 * in old_rtm. 546 */ 547 if (old_rtm != NULL) 548 Free(old_rtm); 549 if (rt) 550 rtfree(rt); 551 { 552 struct rawcb *rp = NULL; 553 /* 554 * Check to see if we don't want our own messages. 555 */ 556 if ((so->so_options & SO_USELOOPBACK) == 0) { 557 if (COMPATNAME(route_info).ri_cb.any_count <= 1) { 558 if (rtm) 559 Free(rtm); 560 m_freem(m); 561 return error; 562 } 563 /* There is another listener, so construct message */ 564 rp = sotorawcb(so); 565 } 566 if (rtm) { 567 m_copyback(m, 0, rtm->rtm_msglen, rtm); 568 if (m->m_pkthdr.len < rtm->rtm_msglen) { 569 m_freem(m); 570 m = NULL; 571 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 572 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 573 Free(rtm); 574 } 575 if (rp) 576 rp->rcb_proto.sp_family = 0; /* Avoid us */ 577 if (family) 578 proto.sp_protocol = family; 579 if (m) 580 raw_input(m, &proto, &COMPATNAME(route_info).ri_src, 581 &COMPATNAME(route_info).ri_dst); 582 if (rp) 583 rp->rcb_proto.sp_family = PF_XROUTE; 584 } 585 return error; 586 } 587 588 static void 589 rt_setmetrics(int which, const struct rt_xmsghdr *in, struct rtentry *out) 590 { 591 #define metric(f, e) if (which & (f)) out->rt_rmx.e = in->rtm_rmx.e; 592 metric(RTV_RPIPE, rmx_recvpipe); 593 metric(RTV_SPIPE, rmx_sendpipe); 594 metric(RTV_SSTHRESH, rmx_ssthresh); 595 metric(RTV_RTT, rmx_rtt); 596 metric(RTV_RTTVAR, rmx_rttvar); 597 metric(RTV_HOPCOUNT, rmx_hopcount); 598 metric(RTV_MTU, rmx_mtu); 599 metric(RTV_EXPIRE, rmx_expire); 600 #undef metric 601 } 602 603 static void 604 rtm_setmetrics(const struct rtentry *in, struct rt_xmsghdr *out) 605 { 606 #define metric(e) out->rtm_rmx.e = in->rt_rmx.e; 607 metric(rmx_recvpipe); 608 metric(rmx_sendpipe); 609 metric(rmx_ssthresh); 610 metric(rmx_rtt); 611 metric(rmx_rttvar); 612 metric(rmx_hopcount); 613 metric(rmx_mtu); 614 metric(rmx_expire); 615 #undef metric 616 } 617 618 static int 619 rt_xaddrs(u_char rtmtype, const char *cp, const char *cplim, 620 struct rt_addrinfo *rtinfo) 621 { 622 const struct sockaddr *sa = NULL; /* Quell compiler warning */ 623 int i; 624 625 for (i = 0; i < RTAX_MAX && cp < cplim; i++) { 626 if ((rtinfo->rti_addrs & (1 << i)) == 0) 627 continue; 628 rtinfo->rti_info[i] = sa = (const struct sockaddr *)cp; 629 RT_XADVANCE(cp, sa); 630 } 631 632 /* 633 * Check for extra addresses specified, except RTM_GET asking 634 * for interface info. 635 */ 636 if (rtmtype == RTM_GET) { 637 if (((rtinfo->rti_addrs & 638 (~((1 << RTAX_IFP) | (1 << RTAX_IFA)))) & (~0 << i)) != 0) 639 return 1; 640 } else if ((rtinfo->rti_addrs & (~0 << i)) != 0) 641 return 1; 642 /* Check for bad data length. */ 643 if (cp != cplim) { 644 if (i == RTAX_NETMASK + 1 && sa != NULL && 645 cp - RT_XROUNDUP(sa->sa_len) + sa->sa_len == cplim) 646 /* 647 * The last sockaddr was info.rti_info[RTAX_NETMASK]. 648 * We accept this for now for the sake of old 649 * binaries or third party softwares. 650 */ 651 ; 652 else 653 return 1; 654 } 655 return 0; 656 } 657 658 static int 659 rt_getlen(int type) 660 { 661 #ifndef COMPAT_RTSOCK 662 CTASSERT(__alignof(struct ifa_msghdr) >= sizeof(uint64_t)); 663 CTASSERT(__alignof(struct if_msghdr) >= sizeof(uint64_t)); 664 CTASSERT(__alignof(struct if_announcemsghdr) >= sizeof(uint64_t)); 665 CTASSERT(__alignof(struct rt_msghdr) >= sizeof(uint64_t)); 666 #endif 667 668 switch (type) { 669 case RTM_DELADDR: 670 case RTM_NEWADDR: 671 case RTM_CHGADDR: 672 return sizeof(struct ifa_xmsghdr); 673 674 case RTM_OOIFINFO: 675 #ifdef COMPAT_14 676 return sizeof(struct if_msghdr14); 677 #else 678 #ifdef DIAGNOSTIC 679 printf("RTM_OOIFINFO\n"); 680 #endif 681 return -1; 682 #endif 683 case RTM_OIFINFO: 684 #ifdef COMPAT_50 685 return sizeof(struct if_msghdr50); 686 #else 687 #ifdef DIAGNOSTIC 688 printf("RTM_OIFINFO\n"); 689 #endif 690 return -1; 691 #endif 692 693 case RTM_IFINFO: 694 return sizeof(struct if_xmsghdr); 695 696 case RTM_IFANNOUNCE: 697 case RTM_IEEE80211: 698 return sizeof(struct if_xannouncemsghdr); 699 700 default: 701 return sizeof(struct rt_xmsghdr); 702 } 703 } 704 705 706 struct mbuf * 707 COMPATNAME(rt_msg1)(int type, struct rt_addrinfo *rtinfo, void *data, int datalen) 708 { 709 struct rt_xmsghdr *rtm; 710 struct mbuf *m; 711 int i; 712 const struct sockaddr *sa; 713 int len, dlen; 714 715 m = m_gethdr(M_DONTWAIT, MT_DATA); 716 if (m == NULL) 717 return m; 718 MCLAIM(m, &COMPATNAME(routedomain).dom_mowner); 719 720 if ((len = rt_getlen(type)) == -1) 721 goto out; 722 if (len > MHLEN + MLEN) 723 panic("%s: message too long", __func__); 724 else if (len > MHLEN) { 725 m->m_next = m_get(M_DONTWAIT, MT_DATA); 726 if (m->m_next == NULL) 727 goto out; 728 MCLAIM(m->m_next, m->m_owner); 729 m->m_pkthdr.len = len; 730 m->m_len = MHLEN; 731 m->m_next->m_len = len - MHLEN; 732 } else { 733 m->m_pkthdr.len = m->m_len = len; 734 } 735 m->m_pkthdr.rcvif = NULL; 736 m_copyback(m, 0, datalen, data); 737 if (len > datalen) 738 (void)memset(mtod(m, char *) + datalen, 0, len - datalen); 739 rtm = mtod(m, struct rt_xmsghdr *); 740 for (i = 0; i < RTAX_MAX; i++) { 741 if ((sa = rtinfo->rti_info[i]) == NULL) 742 continue; 743 rtinfo->rti_addrs |= (1 << i); 744 dlen = RT_XROUNDUP(sa->sa_len); 745 m_copyback(m, len, sa->sa_len, sa); 746 if (dlen != sa->sa_len) { 747 /* 748 * Up to 6 + 1 nul's since roundup is to 749 * sizeof(uint64_t) (8 bytes) 750 */ 751 m_copyback(m, len + sa->sa_len, 752 dlen - sa->sa_len, "\0\0\0\0\0\0"); 753 } 754 len += dlen; 755 } 756 if (m->m_pkthdr.len != len) 757 goto out; 758 rtm->rtm_msglen = len; 759 rtm->rtm_version = RTM_XVERSION; 760 rtm->rtm_type = type; 761 return m; 762 out: 763 m_freem(m); 764 return NULL; 765 } 766 767 /* 768 * rt_msg2 769 * 770 * fills 'cp' or 'w'.w_tmem with the routing socket message and 771 * returns the length of the message in 'lenp'. 772 * 773 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 774 * the message 775 * otherwise walkarg's w_needed is updated and if the user buffer is 776 * specified and w_needed indicates space exists the information is copied 777 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 778 * if the allocation fails ENOBUFS is returned. 779 */ 780 static int 781 rt_msg2(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 782 int *lenp) 783 { 784 int i; 785 int len, dlen, second_time = 0; 786 char *cp0, *cp = cpv; 787 788 rtinfo->rti_addrs = 0; 789 again: 790 if ((len = rt_getlen(type)) == -1) 791 return EINVAL; 792 793 if ((cp0 = cp) != NULL) 794 cp += len; 795 for (i = 0; i < RTAX_MAX; i++) { 796 const struct sockaddr *sa; 797 798 if ((sa = rtinfo->rti_info[i]) == NULL) 799 continue; 800 rtinfo->rti_addrs |= (1 << i); 801 dlen = RT_XROUNDUP(sa->sa_len); 802 if (cp) { 803 int diff = dlen - sa->sa_len; 804 (void)memcpy(cp, sa, (size_t)sa->sa_len); 805 cp += sa->sa_len; 806 if (diff > 0) { 807 (void)memset(cp, 0, (size_t)diff); 808 cp += diff; 809 } 810 } 811 len += dlen; 812 } 813 if (cp == NULL && w != NULL && !second_time) { 814 struct rt_walkarg *rw = w; 815 816 rw->w_needed += len; 817 if (rw->w_needed <= 0 && rw->w_where) { 818 if (rw->w_tmemsize < len) { 819 if (rw->w_tmem) 820 free(rw->w_tmem, M_RTABLE); 821 rw->w_tmem = malloc(len, M_RTABLE, M_NOWAIT); 822 if (rw->w_tmem) 823 rw->w_tmemsize = len; 824 else 825 rw->w_tmemsize = 0; 826 } 827 if (rw->w_tmem) { 828 cp = rw->w_tmem; 829 second_time = 1; 830 goto again; 831 } else { 832 rw->w_tmemneeded = len; 833 return ENOBUFS; 834 } 835 } 836 } 837 if (cp) { 838 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)cp0; 839 840 rtm->rtm_version = RTM_XVERSION; 841 rtm->rtm_type = type; 842 rtm->rtm_msglen = len; 843 } 844 if (lenp) 845 *lenp = len; 846 return 0; 847 } 848 849 /* 850 * This routine is called to generate a message from the routing 851 * socket indicating that a redirect has occurred, a routing lookup 852 * has failed, or that a protocol has detected timeouts to a particular 853 * destination. 854 */ 855 void 856 COMPATNAME(rt_missmsg)(int type, const struct rt_addrinfo *rtinfo, int flags, 857 int error) 858 { 859 struct rt_xmsghdr rtm; 860 struct mbuf *m; 861 const struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 862 struct rt_addrinfo info = *rtinfo; 863 864 COMPATCALL(rt_missmsg, (type, rtinfo, flags, error)); 865 if (COMPATNAME(route_info).ri_cb.any_count == 0) 866 return; 867 memset(&rtm, 0, sizeof(rtm)); 868 rtm.rtm_flags = RTF_DONE | flags; 869 rtm.rtm_errno = error; 870 m = COMPATNAME(rt_msg1)(type, &info, &rtm, sizeof(rtm)); 871 if (m == NULL) 872 return; 873 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 874 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 875 } 876 877 /* 878 * This routine is called to generate a message from the routing 879 * socket indicating that the status of a network interface has changed. 880 */ 881 void 882 COMPATNAME(rt_ifmsg)(struct ifnet *ifp) 883 { 884 struct if_xmsghdr ifm; 885 struct mbuf *m; 886 struct rt_addrinfo info; 887 888 COMPATCALL(rt_ifmsg, (ifp)); 889 if (COMPATNAME(route_info).ri_cb.any_count == 0) 890 return; 891 (void)memset(&info, 0, sizeof(info)); 892 (void)memset(&ifm, 0, sizeof(ifm)); 893 ifm.ifm_index = ifp->if_index; 894 ifm.ifm_flags = ifp->if_flags; 895 ifm.ifm_data = ifp->if_data; 896 ifm.ifm_addrs = 0; 897 m = COMPATNAME(rt_msg1)(RTM_IFINFO, &info, &ifm, sizeof(ifm)); 898 if (m == NULL) 899 return; 900 COMPATNAME(route_enqueue)(m, 0); 901 #ifdef COMPAT_14 902 compat_14_rt_oifmsg(ifp); 903 #endif 904 #ifdef COMPAT_50 905 compat_50_rt_oifmsg(ifp); 906 #endif 907 } 908 909 910 /* 911 * This is called to generate messages from the routing socket 912 * indicating a network interface has had addresses associated with it. 913 * if we ever reverse the logic and replace messages TO the routing 914 * socket indicate a request to configure interfaces, then it will 915 * be unnecessary as the routing socket will automatically generate 916 * copies of it. 917 */ 918 void 919 COMPATNAME(rt_newaddrmsg)(int cmd, struct ifaddr *ifa, int error, 920 struct rtentry *rt) 921 { 922 #define cmdpass(__cmd, __pass) (((__cmd) << 2) | (__pass)) 923 struct rt_addrinfo info; 924 const struct sockaddr *sa; 925 int pass; 926 struct mbuf *m; 927 struct ifnet *ifp; 928 struct rt_xmsghdr rtm; 929 struct ifa_xmsghdr ifam; 930 int ncmd; 931 932 KASSERT(ifa != NULL); 933 ifp = ifa->ifa_ifp; 934 COMPATCALL(rt_newaddrmsg, (cmd, ifa, error, rt)); 935 if (COMPATNAME(route_info).ri_cb.any_count == 0) 936 return; 937 for (pass = 1; pass < 3; pass++) { 938 memset(&info, 0, sizeof(info)); 939 switch (cmdpass(cmd, pass)) { 940 case cmdpass(RTM_ADD, 1): 941 case cmdpass(RTM_CHANGE, 1): 942 case cmdpass(RTM_DELETE, 2): 943 case cmdpass(RTM_NEWADDR, 1): 944 case cmdpass(RTM_DELADDR, 1): 945 case cmdpass(RTM_CHGADDR, 1): 946 switch (cmd) { 947 case RTM_ADD: 948 ncmd = RTM_NEWADDR; 949 break; 950 case RTM_DELETE: 951 ncmd = RTM_DELADDR; 952 break; 953 case RTM_CHANGE: 954 ncmd = RTM_CHGADDR; 955 break; 956 default: 957 ncmd = cmd; 958 } 959 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; 960 KASSERT(ifp->if_dl != NULL); 961 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 962 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 963 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 964 memset(&ifam, 0, sizeof(ifam)); 965 ifam.ifam_index = ifp->if_index; 966 ifam.ifam_metric = ifa->ifa_metric; 967 ifam.ifam_flags = ifa->ifa_flags; 968 m = COMPATNAME(rt_msg1)(ncmd, &info, &ifam, sizeof(ifam)); 969 if (m == NULL) 970 continue; 971 mtod(m, struct ifa_xmsghdr *)->ifam_addrs = 972 info.rti_addrs; 973 break; 974 case cmdpass(RTM_ADD, 2): 975 case cmdpass(RTM_CHANGE, 2): 976 case cmdpass(RTM_DELETE, 1): 977 if (rt == NULL) 978 continue; 979 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 980 info.rti_info[RTAX_DST] = sa = rt_getkey(rt); 981 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 982 memset(&rtm, 0, sizeof(rtm)); 983 rtm.rtm_index = ifp->if_index; 984 rtm.rtm_flags |= rt->rt_flags; 985 rtm.rtm_errno = error; 986 m = COMPATNAME(rt_msg1)(cmd, &info, &rtm, sizeof(rtm)); 987 if (m == NULL) 988 continue; 989 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 990 break; 991 default: 992 continue; 993 } 994 #ifdef DIAGNOSTIC 995 if (m == NULL) 996 panic("%s: called with wrong command", __func__); 997 #endif 998 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 999 } 1000 #undef cmdpass 1001 } 1002 1003 static struct mbuf * 1004 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1005 struct rt_addrinfo *info) 1006 { 1007 struct if_xannouncemsghdr ifan; 1008 1009 memset(info, 0, sizeof(*info)); 1010 memset(&ifan, 0, sizeof(ifan)); 1011 ifan.ifan_index = ifp->if_index; 1012 strlcpy(ifan.ifan_name, ifp->if_xname, sizeof(ifan.ifan_name)); 1013 ifan.ifan_what = what; 1014 return COMPATNAME(rt_msg1)(type, info, &ifan, sizeof(ifan)); 1015 } 1016 1017 /* 1018 * This is called to generate routing socket messages indicating 1019 * network interface arrival and departure. 1020 */ 1021 void 1022 COMPATNAME(rt_ifannouncemsg)(struct ifnet *ifp, int what) 1023 { 1024 struct mbuf *m; 1025 struct rt_addrinfo info; 1026 1027 COMPATCALL(rt_ifannouncemsg, (ifp, what)); 1028 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1029 return; 1030 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); 1031 if (m == NULL) 1032 return; 1033 COMPATNAME(route_enqueue)(m, 0); 1034 } 1035 1036 /* 1037 * This is called to generate routing socket messages indicating 1038 * IEEE80211 wireless events. 1039 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1040 */ 1041 void 1042 COMPATNAME(rt_ieee80211msg)(struct ifnet *ifp, int what, void *data, 1043 size_t data_len) 1044 { 1045 struct mbuf *m; 1046 struct rt_addrinfo info; 1047 1048 COMPATCALL(rt_ieee80211msg, (ifp, what, data, data_len)); 1049 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1050 return; 1051 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1052 if (m == NULL) 1053 return; 1054 /* 1055 * Append the ieee80211 data. Try to stick it in the 1056 * mbuf containing the ifannounce msg; otherwise allocate 1057 * a new mbuf and append. 1058 * 1059 * NB: we assume m is a single mbuf. 1060 */ 1061 if (data_len > M_TRAILINGSPACE(m)) { 1062 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 1063 if (n == NULL) { 1064 m_freem(m); 1065 return; 1066 } 1067 (void)memcpy(mtod(n, void *), data, data_len); 1068 n->m_len = data_len; 1069 m->m_next = n; 1070 } else if (data_len > 0) { 1071 (void)memcpy(mtod(m, uint8_t *) + m->m_len, data, data_len); 1072 m->m_len += data_len; 1073 } 1074 if (m->m_flags & M_PKTHDR) 1075 m->m_pkthdr.len += data_len; 1076 mtod(m, struct if_xannouncemsghdr *)->ifan_msglen += data_len; 1077 COMPATNAME(route_enqueue)(m, 0); 1078 } 1079 1080 /* 1081 * This is used in dumping the kernel table via sysctl(). 1082 */ 1083 static int 1084 sysctl_dumpentry(struct rtentry *rt, void *v) 1085 { 1086 struct rt_walkarg *w = v; 1087 int error = 0, size; 1088 struct rt_addrinfo info; 1089 1090 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1091 return 0; 1092 memset(&info, 0, sizeof(info)); 1093 info.rti_info[RTAX_DST] = rt_getkey(rt); 1094 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1095 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1096 info.rti_info[RTAX_TAG] = rt_gettag(rt); 1097 if (rt->rt_ifp) { 1098 const struct ifaddr *rtifa; 1099 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_dl->ifa_addr; 1100 /* rtifa used to be simply rt->rt_ifa. If rt->rt_ifa != NULL, 1101 * then rt_get_ifa() != NULL. So this ought to still be safe. 1102 * --dyoung 1103 */ 1104 rtifa = rt_get_ifa(rt); 1105 info.rti_info[RTAX_IFA] = rtifa->ifa_addr; 1106 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1107 info.rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 1108 } 1109 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 1110 return error; 1111 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1112 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)w->w_tmem; 1113 1114 rtm->rtm_flags = rt->rt_flags; 1115 rtm->rtm_use = rt->rt_use; 1116 rtm_setmetrics(rt, rtm); 1117 KASSERT(rt->rt_ifp != NULL); 1118 rtm->rtm_index = rt->rt_ifp->if_index; 1119 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1120 rtm->rtm_addrs = info.rti_addrs; 1121 if ((error = copyout(rtm, w->w_where, size)) != 0) 1122 w->w_where = NULL; 1123 else 1124 w->w_where = (char *)w->w_where + size; 1125 } 1126 return error; 1127 } 1128 1129 static int 1130 sysctl_iflist(int af, struct rt_walkarg *w, int type) 1131 { 1132 struct ifnet *ifp; 1133 struct ifaddr *ifa; 1134 struct rt_addrinfo info; 1135 int len, error = 0; 1136 1137 memset(&info, 0, sizeof(info)); 1138 IFNET_FOREACH(ifp) { 1139 if (w->w_arg && w->w_arg != ifp->if_index) 1140 continue; 1141 if (IFADDR_EMPTY(ifp)) 1142 continue; 1143 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1144 switch (type) { 1145 case NET_RT_IFLIST: 1146 error = rt_msg2(RTM_IFINFO, &info, NULL, w, &len); 1147 break; 1148 #ifdef COMPAT_14 1149 case NET_RT_OOIFLIST: 1150 error = rt_msg2(RTM_OOIFINFO, &info, NULL, w, &len); 1151 break; 1152 #endif 1153 #ifdef COMPAT_50 1154 case NET_RT_OIFLIST: 1155 error = rt_msg2(RTM_OIFINFO, &info, NULL, w, &len); 1156 break; 1157 #endif 1158 default: 1159 panic("sysctl_iflist(1)"); 1160 } 1161 if (error) 1162 return error; 1163 info.rti_info[RTAX_IFP] = NULL; 1164 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1165 switch (type) { 1166 case NET_RT_IFLIST: { 1167 struct if_xmsghdr *ifm; 1168 1169 ifm = (struct if_xmsghdr *)w->w_tmem; 1170 ifm->ifm_index = ifp->if_index; 1171 ifm->ifm_flags = ifp->if_flags; 1172 ifm->ifm_data = ifp->if_data; 1173 ifm->ifm_addrs = info.rti_addrs; 1174 error = copyout(ifm, w->w_where, len); 1175 if (error) 1176 return error; 1177 w->w_where = (char *)w->w_where + len; 1178 break; 1179 } 1180 1181 #ifdef COMPAT_14 1182 case NET_RT_OOIFLIST: 1183 error = compat_14_iflist(ifp, w, &info, len); 1184 if (error) 1185 return error; 1186 break; 1187 #endif 1188 #ifdef COMPAT_50 1189 case NET_RT_OIFLIST: 1190 error = compat_50_iflist(ifp, w, &info, len); 1191 if (error) 1192 return error; 1193 break; 1194 #endif 1195 default: 1196 panic("sysctl_iflist(2)"); 1197 } 1198 } 1199 IFADDR_FOREACH(ifa, ifp) { 1200 if (af && af != ifa->ifa_addr->sa_family) 1201 continue; 1202 info.rti_info[RTAX_IFA] = ifa->ifa_addr; 1203 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1204 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1205 if ((error = rt_msg2(RTM_NEWADDR, &info, 0, w, &len))) 1206 return error; 1207 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1208 struct ifa_xmsghdr *ifam; 1209 1210 ifam = (struct ifa_xmsghdr *)w->w_tmem; 1211 ifam->ifam_index = ifa->ifa_ifp->if_index; 1212 ifam->ifam_flags = ifa->ifa_flags; 1213 ifam->ifam_metric = ifa->ifa_metric; 1214 ifam->ifam_addrs = info.rti_addrs; 1215 error = copyout(w->w_tmem, w->w_where, len); 1216 if (error) 1217 return error; 1218 w->w_where = (char *)w->w_where + len; 1219 } 1220 } 1221 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] = 1222 info.rti_info[RTAX_BRD] = NULL; 1223 } 1224 return 0; 1225 } 1226 1227 static int 1228 sysctl_rtable(SYSCTLFN_ARGS) 1229 { 1230 void *where = oldp; 1231 size_t *given = oldlenp; 1232 const void *new = newp; 1233 int i, s, error = EINVAL; 1234 u_char af; 1235 struct rt_walkarg w; 1236 1237 if (namelen == 1 && name[0] == CTL_QUERY) 1238 return sysctl_query(SYSCTLFN_CALL(rnode)); 1239 1240 if (new) 1241 return EPERM; 1242 if (namelen != 3) 1243 return EINVAL; 1244 af = name[0]; 1245 w.w_tmemneeded = 0; 1246 w.w_tmemsize = 0; 1247 w.w_tmem = NULL; 1248 again: 1249 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 1250 if (w.w_tmemneeded) { 1251 w.w_tmem = malloc(w.w_tmemneeded, M_RTABLE, M_WAITOK); 1252 w.w_tmemsize = w.w_tmemneeded; 1253 w.w_tmemneeded = 0; 1254 } 1255 w.w_op = name[1]; 1256 w.w_arg = name[2]; 1257 w.w_given = *given; 1258 w.w_needed = 0 - w.w_given; 1259 w.w_where = where; 1260 1261 s = splsoftnet(); 1262 switch (w.w_op) { 1263 1264 case NET_RT_DUMP: 1265 case NET_RT_FLAGS: 1266 for (i = 1; i <= AF_MAX; i++) 1267 if ((af == 0 || af == i) && 1268 (error = rt_walktree(i, sysctl_dumpentry, &w))) 1269 break; 1270 break; 1271 1272 #ifdef COMPAT_14 1273 case NET_RT_OOIFLIST: 1274 error = sysctl_iflist(af, &w, w.w_op); 1275 break; 1276 #endif 1277 #ifdef COMPAT_50 1278 case NET_RT_OIFLIST: 1279 error = sysctl_iflist(af, &w, w.w_op); 1280 break; 1281 #endif 1282 case NET_RT_IFLIST: 1283 error = sysctl_iflist(af, &w, w.w_op); 1284 break; 1285 } 1286 splx(s); 1287 1288 /* check to see if we couldn't allocate memory with NOWAIT */ 1289 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 1290 goto again; 1291 1292 if (w.w_tmem) 1293 free(w.w_tmem, M_RTABLE); 1294 w.w_needed += w.w_given; 1295 if (where) { 1296 *given = (char *)w.w_where - (char *)where; 1297 if (*given < w.w_needed) 1298 return ENOMEM; 1299 } else { 1300 *given = (11 * w.w_needed) / 10; 1301 } 1302 return error; 1303 } 1304 1305 /* 1306 * Routing message software interrupt routine 1307 */ 1308 static void 1309 COMPATNAME(route_intr)(void *cookie) 1310 { 1311 struct sockproto proto = { .sp_family = PF_XROUTE, }; 1312 struct route_info * const ri = &COMPATNAME(route_info); 1313 struct mbuf *m; 1314 int s; 1315 1316 mutex_enter(softnet_lock); 1317 KERNEL_LOCK(1, NULL); 1318 while (!IF_IS_EMPTY(&ri->ri_intrq)) { 1319 s = splnet(); 1320 IF_DEQUEUE(&ri->ri_intrq, m); 1321 splx(s); 1322 if (m == NULL) 1323 break; 1324 proto.sp_protocol = M_GETCTX(m, uintptr_t); 1325 raw_input(m, &proto, &ri->ri_src, &ri->ri_dst); 1326 } 1327 KERNEL_UNLOCK_ONE(NULL); 1328 mutex_exit(softnet_lock); 1329 } 1330 1331 /* 1332 * Enqueue a message to the software interrupt routine. 1333 */ 1334 void 1335 COMPATNAME(route_enqueue)(struct mbuf *m, int family) 1336 { 1337 struct route_info * const ri = &COMPATNAME(route_info); 1338 int s, wasempty; 1339 1340 s = splnet(); 1341 if (IF_QFULL(&ri->ri_intrq)) { 1342 IF_DROP(&ri->ri_intrq); 1343 m_freem(m); 1344 } else { 1345 wasempty = IF_IS_EMPTY(&ri->ri_intrq); 1346 M_SETCTX(m, (uintptr_t)family); 1347 IF_ENQUEUE(&ri->ri_intrq, m); 1348 if (wasempty) 1349 softint_schedule(ri->ri_sih); 1350 } 1351 splx(s); 1352 } 1353 1354 static void 1355 COMPATNAME(route_init)(void) 1356 { 1357 struct route_info * const ri = &COMPATNAME(route_info); 1358 1359 #ifndef COMPAT_RTSOCK 1360 rt_init(); 1361 #endif 1362 1363 sysctl_net_route_setup(NULL); 1364 ri->ri_intrq.ifq_maxlen = ri->ri_maxqlen; 1365 ri->ri_sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 1366 COMPATNAME(route_intr), NULL); 1367 } 1368 1369 /* 1370 * Definitions of protocols supported in the ROUTE domain. 1371 */ 1372 #ifndef COMPAT_RTSOCK 1373 PR_WRAP_USRREQS(route); 1374 #else 1375 PR_WRAP_USRREQS(compat_50_route); 1376 #endif 1377 1378 static const struct pr_usrreqs route_usrreqs = { 1379 .pr_attach = COMPATNAME(route_attach_wrapper), 1380 .pr_detach = COMPATNAME(route_detach_wrapper), 1381 .pr_ioctl = COMPATNAME(route_ioctl_wrapper), 1382 .pr_stat = COMPATNAME(route_stat_wrapper), 1383 .pr_peeraddr = COMPATNAME(route_peeraddr_wrapper), 1384 .pr_sockaddr = COMPATNAME(route_sockaddr_wrapper), 1385 .pr_generic = COMPATNAME(route_usrreq_wrapper), 1386 }; 1387 1388 static const struct protosw COMPATNAME(route_protosw)[] = { 1389 { 1390 .pr_type = SOCK_RAW, 1391 .pr_domain = &COMPATNAME(routedomain), 1392 .pr_flags = PR_ATOMIC|PR_ADDR, 1393 .pr_input = raw_input, 1394 .pr_output = COMPATNAME(route_output), 1395 .pr_ctlinput = raw_ctlinput, 1396 .pr_usrreqs = &route_usrreqs, 1397 .pr_init = raw_init, 1398 }, 1399 }; 1400 1401 struct domain COMPATNAME(routedomain) = { 1402 .dom_family = PF_XROUTE, 1403 .dom_name = DOMAINNAME, 1404 .dom_init = COMPATNAME(route_init), 1405 .dom_protosw = COMPATNAME(route_protosw), 1406 .dom_protoswNPROTOSW = 1407 &COMPATNAME(route_protosw)[__arraycount(COMPATNAME(route_protosw))], 1408 }; 1409 1410 static void 1411 sysctl_net_route_setup(struct sysctllog **clog) 1412 { 1413 const struct sysctlnode *rnode = NULL; 1414 1415 sysctl_createv(clog, 0, NULL, &rnode, 1416 CTLFLAG_PERMANENT, 1417 CTLTYPE_NODE, DOMAINNAME, 1418 SYSCTL_DESCR("PF_ROUTE information"), 1419 NULL, 0, NULL, 0, 1420 CTL_NET, PF_XROUTE, CTL_EOL); 1421 1422 sysctl_createv(clog, 0, NULL, NULL, 1423 CTLFLAG_PERMANENT, 1424 CTLTYPE_NODE, "rtable", 1425 SYSCTL_DESCR("Routing table information"), 1426 sysctl_rtable, 0, NULL, 0, 1427 CTL_NET, PF_XROUTE, 0 /* any protocol */, CTL_EOL); 1428 1429 sysctl_createv(clog, 0, &rnode, NULL, 1430 CTLFLAG_PERMANENT, 1431 CTLTYPE_STRUCT, "stats", 1432 SYSCTL_DESCR("Routing statistics"), 1433 NULL, 0, &rtstat, sizeof(rtstat), 1434 CTL_CREATE, CTL_EOL); 1435 } 1436
Indexes created Tue Sep 23 21:09:50 GMT 2025