rtsock.c revision 1.164.2.12
1 /* $NetBSD: rtsock.c,v 1.164.2.12 2017/08/28 17:53:11 skrll 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 1.164.2.12 2017/08/28 17:53:11 skrll Exp $"); 65 66 #ifdef _KERNEL_OPT 67 #include "opt_inet.h" 68 #include "opt_mpls.h" 69 #include "opt_compat_netbsd.h" 70 #include "opt_sctp.h" 71 #include "opt_net_mpsafe.h" 72 #endif 73 74 #include <sys/param.h> 75 #include <sys/systm.h> 76 #include <sys/proc.h> 77 #include <sys/socket.h> 78 #include <sys/socketvar.h> 79 #include <sys/domain.h> 80 #include <sys/protosw.h> 81 #include <sys/sysctl.h> 82 #include <sys/kauth.h> 83 #include <sys/kmem.h> 84 #include <sys/intr.h> 85 86 #include <net/if.h> 87 #include <net/if_llatbl.h> 88 #include <net/if_types.h> 89 #include <net/route.h> 90 #include <net/raw_cb.h> 91 92 #include <netinet/in_var.h> 93 #include <netinet/if_inarp.h> 94 95 #include <netmpls/mpls.h> 96 97 #ifdef SCTP 98 extern void sctp_add_ip_address(struct ifaddr *); 99 extern void sctp_delete_ip_address(struct ifaddr *); 100 #endif 101 102 #if defined(COMPAT_14) || defined(COMPAT_50) || defined(COMPAT_70) 103 #include <compat/net/if.h> 104 #include <compat/net/route.h> 105 #endif 106 #ifdef COMPAT_RTSOCK 107 #define RTM_XVERSION RTM_OVERSION 108 #define RTM_XNEWADDR RTM_ONEWADDR 109 #define RTM_XDELADDR RTM_ODELADDR 110 #define RTM_XCHGADDR RTM_OCHGADDR 111 #define RT_XADVANCE(a,b) RT_OADVANCE(a,b) 112 #define RT_XROUNDUP(n) RT_OROUNDUP(n) 113 #define PF_XROUTE PF_OROUTE 114 #define rt_xmsghdr rt_msghdr50 115 #define if_xmsghdr if_msghdr /* if_msghdr50 is for RTM_OIFINFO */ 116 #define ifa_xmsghdr ifa_msghdr50 117 #define if_xannouncemsghdr if_announcemsghdr50 118 #define COMPATNAME(x) compat_50_ ## x 119 #define DOMAINNAME "oroute" 120 CTASSERT(sizeof(struct ifa_xmsghdr) == 20); 121 DOMAIN_DEFINE(compat_50_routedomain); /* forward declare and add to link set */ 122 #undef COMPAT_70 123 #else /* COMPAT_RTSOCK */ 124 #define RTM_XVERSION RTM_VERSION 125 #define RTM_XNEWADDR RTM_NEWADDR 126 #define RTM_XDELADDR RTM_DELADDR 127 #define RTM_XCHGADDR RTM_CHGADDR 128 #define RT_XADVANCE(a,b) RT_ADVANCE(a,b) 129 #define RT_XROUNDUP(n) RT_ROUNDUP(n) 130 #define PF_XROUTE PF_ROUTE 131 #define rt_xmsghdr rt_msghdr 132 #define if_xmsghdr if_msghdr 133 #define ifa_xmsghdr ifa_msghdr 134 #define if_xannouncemsghdr if_announcemsghdr 135 #define COMPATNAME(x) x 136 #define DOMAINNAME "route" 137 CTASSERT(sizeof(struct ifa_xmsghdr) == 32); 138 #ifdef COMPAT_50 139 #define COMPATCALL(name, args) compat_50_ ## name args 140 #endif 141 DOMAIN_DEFINE(routedomain); /* forward declare and add to link set */ 142 #undef COMPAT_50 143 #undef COMPAT_14 144 #endif /* COMPAT_RTSOCK */ 145 146 #ifndef COMPATCALL 147 #define COMPATCALL(name, args) do { } while (/*CONSTCOND*/ 0) 148 #endif 149 150 #ifdef RTSOCK_DEBUG 151 #define RT_IN_PRINT(info, b, a) (in_print((b), sizeof(b), \ 152 &((const struct sockaddr_in *)(info)->rti_info[(a)])->sin_addr), (b)) 153 #endif /* RTSOCK_DEBUG */ 154 155 struct route_info COMPATNAME(route_info) = { 156 .ri_dst = { .sa_len = 2, .sa_family = PF_XROUTE, }, 157 .ri_src = { .sa_len = 2, .sa_family = PF_XROUTE, }, 158 .ri_maxqlen = IFQ_MAXLEN, 159 }; 160 161 #define PRESERVED_RTF (RTF_UP | RTF_GATEWAY | RTF_HOST | RTF_DONE | RTF_MASK) 162 163 static void COMPATNAME(route_init)(void); 164 static int COMPATNAME(route_output)(struct mbuf *, struct socket *); 165 166 static int rt_xaddrs(u_char, const char *, const char *, struct rt_addrinfo *); 167 static struct mbuf *rt_makeifannouncemsg(struct ifnet *, int, int, 168 struct rt_addrinfo *); 169 static int rt_msg2(int, struct rt_addrinfo *, void *, struct rt_walkarg *, int *); 170 static void rt_setmetrics(int, const struct rt_xmsghdr *, struct rtentry *); 171 static void rtm_setmetrics(const struct rtentry *, struct rt_xmsghdr *); 172 static void sysctl_net_route_setup(struct sysctllog **); 173 static int sysctl_dumpentry(struct rtentry *, void *); 174 static int sysctl_iflist(int, struct rt_walkarg *, int); 175 static int sysctl_rtable(SYSCTLFN_PROTO); 176 static void rt_adjustcount(int, int); 177 178 static const struct protosw COMPATNAME(route_protosw)[]; 179 180 struct routecb { 181 struct rawcb rocb_rcb; 182 unsigned int rocb_msgfilter; 183 #define RTMSGFILTER(m) (1U << (m)) 184 }; 185 #define sotoroutecb(so) ((struct routecb *)(so)->so_pcb) 186 187 static void 188 rt_adjustcount(int af, int cnt) 189 { 190 struct route_cb * const cb = &COMPATNAME(route_info).ri_cb; 191 192 cb->any_count += cnt; 193 194 switch (af) { 195 case AF_INET: 196 cb->ip_count += cnt; 197 return; 198 #ifdef INET6 199 case AF_INET6: 200 cb->ip6_count += cnt; 201 return; 202 #endif 203 case AF_MPLS: 204 cb->mpls_count += cnt; 205 return; 206 } 207 } 208 209 static int 210 COMPATNAME(route_filter)(struct mbuf *m, struct sockproto *proto, 211 struct rawcb *rp) 212 { 213 struct routecb *rop = (struct routecb *)rp; 214 struct rt_xmsghdr *rtm; 215 216 KASSERT(m != NULL); 217 KASSERT(proto != NULL); 218 KASSERT(rp != NULL); 219 220 /* Wrong family for this socket. */ 221 if (proto->sp_family != PF_ROUTE) 222 return ENOPROTOOPT; 223 224 /* If no filter set, just return. */ 225 if (rop->rocb_msgfilter == 0) 226 return 0; 227 228 /* Ensure we can access rtm_type */ 229 if (m->m_len < 230 offsetof(struct rt_xmsghdr, rtm_type) + sizeof(rtm->rtm_type)) 231 return EINVAL; 232 233 rtm = mtod(m, struct rt_xmsghdr *); 234 /* If the rtm type is filtered out, return a positive. */ 235 if (!(rop->rocb_msgfilter & RTMSGFILTER(rtm->rtm_type))) 236 return EEXIST; 237 238 /* Passed the filter. */ 239 return 0; 240 } 241 242 static int 243 COMPATNAME(route_attach)(struct socket *so, int proto) 244 { 245 struct rawcb *rp; 246 struct routecb *rop; 247 int s, error; 248 249 KASSERT(sotorawcb(so) == NULL); 250 rop = kmem_zalloc(sizeof(*rop), KM_SLEEP); 251 rp = &rop->rocb_rcb; 252 rp->rcb_len = sizeof(*rop); 253 so->so_pcb = rp; 254 255 s = splsoftnet(); 256 if ((error = raw_attach(so, proto)) == 0) { 257 rt_adjustcount(rp->rcb_proto.sp_protocol, 1); 258 rp->rcb_laddr = &COMPATNAME(route_info).ri_src; 259 rp->rcb_faddr = &COMPATNAME(route_info).ri_dst; 260 rp->rcb_filter = COMPATNAME(route_filter); 261 } 262 splx(s); 263 264 if (error) { 265 kmem_free(rop, sizeof(*rop)); 266 so->so_pcb = NULL; 267 return error; 268 } 269 270 soisconnected(so); 271 so->so_options |= SO_USELOOPBACK; 272 KASSERT(solocked(so)); 273 274 return error; 275 } 276 277 static void 278 COMPATNAME(route_detach)(struct socket *so) 279 { 280 struct rawcb *rp = sotorawcb(so); 281 int s; 282 283 KASSERT(rp != NULL); 284 KASSERT(solocked(so)); 285 286 s = splsoftnet(); 287 rt_adjustcount(rp->rcb_proto.sp_protocol, -1); 288 raw_detach(so); 289 splx(s); 290 } 291 292 static int 293 COMPATNAME(route_accept)(struct socket *so, struct sockaddr *nam) 294 { 295 KASSERT(solocked(so)); 296 297 panic("route_accept"); 298 299 return EOPNOTSUPP; 300 } 301 302 static int 303 COMPATNAME(route_bind)(struct socket *so, struct sockaddr *nam, struct lwp *l) 304 { 305 KASSERT(solocked(so)); 306 307 return EOPNOTSUPP; 308 } 309 310 static int 311 COMPATNAME(route_listen)(struct socket *so, struct lwp *l) 312 { 313 KASSERT(solocked(so)); 314 315 return EOPNOTSUPP; 316 } 317 318 static int 319 COMPATNAME(route_connect)(struct socket *so, struct sockaddr *nam, struct lwp *l) 320 { 321 KASSERT(solocked(so)); 322 323 return EOPNOTSUPP; 324 } 325 326 static int 327 COMPATNAME(route_connect2)(struct socket *so, struct socket *so2) 328 { 329 KASSERT(solocked(so)); 330 331 return EOPNOTSUPP; 332 } 333 334 static int 335 COMPATNAME(route_disconnect)(struct socket *so) 336 { 337 struct rawcb *rp = sotorawcb(so); 338 int s; 339 340 KASSERT(solocked(so)); 341 KASSERT(rp != NULL); 342 343 s = splsoftnet(); 344 soisdisconnected(so); 345 raw_disconnect(rp); 346 splx(s); 347 348 return 0; 349 } 350 351 static int 352 COMPATNAME(route_shutdown)(struct socket *so) 353 { 354 int s; 355 356 KASSERT(solocked(so)); 357 358 /* 359 * Mark the connection as being incapable of further input. 360 */ 361 s = splsoftnet(); 362 socantsendmore(so); 363 splx(s); 364 return 0; 365 } 366 367 static int 368 COMPATNAME(route_abort)(struct socket *so) 369 { 370 KASSERT(solocked(so)); 371 372 panic("route_abort"); 373 374 return EOPNOTSUPP; 375 } 376 377 static int 378 COMPATNAME(route_ioctl)(struct socket *so, u_long cmd, void *nam, 379 struct ifnet * ifp) 380 { 381 return EOPNOTSUPP; 382 } 383 384 static int 385 COMPATNAME(route_stat)(struct socket *so, struct stat *ub) 386 { 387 KASSERT(solocked(so)); 388 389 return 0; 390 } 391 392 static int 393 COMPATNAME(route_peeraddr)(struct socket *so, struct sockaddr *nam) 394 { 395 struct rawcb *rp = sotorawcb(so); 396 397 KASSERT(solocked(so)); 398 KASSERT(rp != NULL); 399 KASSERT(nam != NULL); 400 401 if (rp->rcb_faddr == NULL) 402 return ENOTCONN; 403 404 raw_setpeeraddr(rp, nam); 405 return 0; 406 } 407 408 static int 409 COMPATNAME(route_sockaddr)(struct socket *so, struct sockaddr *nam) 410 { 411 struct rawcb *rp = sotorawcb(so); 412 413 KASSERT(solocked(so)); 414 KASSERT(rp != NULL); 415 KASSERT(nam != NULL); 416 417 if (rp->rcb_faddr == NULL) 418 return ENOTCONN; 419 420 raw_setsockaddr(rp, nam); 421 return 0; 422 } 423 424 static int 425 COMPATNAME(route_rcvd)(struct socket *so, int flags, struct lwp *l) 426 { 427 KASSERT(solocked(so)); 428 429 return EOPNOTSUPP; 430 } 431 432 static int 433 COMPATNAME(route_recvoob)(struct socket *so, struct mbuf *m, int flags) 434 { 435 KASSERT(solocked(so)); 436 437 return EOPNOTSUPP; 438 } 439 440 static int 441 COMPATNAME(route_send)(struct socket *so, struct mbuf *m, 442 struct sockaddr *nam, struct mbuf *control, struct lwp *l) 443 { 444 int error = 0; 445 int s; 446 447 KASSERT(solocked(so)); 448 KASSERT(so->so_proto == &COMPATNAME(route_protosw)[0]); 449 450 s = splsoftnet(); 451 error = raw_send(so, m, nam, control, l, &COMPATNAME(route_output)); 452 splx(s); 453 454 return error; 455 } 456 457 static int 458 COMPATNAME(route_sendoob)(struct socket *so, struct mbuf *m, 459 struct mbuf *control) 460 { 461 KASSERT(solocked(so)); 462 463 m_freem(m); 464 m_freem(control); 465 466 return EOPNOTSUPP; 467 } 468 static int 469 COMPATNAME(route_purgeif)(struct socket *so, struct ifnet *ifp) 470 { 471 472 panic("route_purgeif"); 473 474 return EOPNOTSUPP; 475 } 476 477 #if defined(INET) || defined(INET6) 478 static int 479 route_get_sdl_index(struct rt_addrinfo *info, int *sdl_index) 480 { 481 struct rtentry *nrt; 482 int error; 483 484 error = rtrequest1(RTM_GET, info, &nrt); 485 if (error != 0) 486 return error; 487 /* 488 * nrt->rt_ifp->if_index may not be correct 489 * due to changing to ifplo0. 490 */ 491 *sdl_index = satosdl(nrt->rt_gateway)->sdl_index; 492 rt_unref(nrt); 493 494 return 0; 495 } 496 #endif 497 498 static void 499 route_get_sdl(const struct ifnet *ifp, const struct sockaddr *dst, 500 struct sockaddr_dl *sdl, int *flags) 501 { 502 struct llentry *la; 503 504 KASSERT(ifp != NULL); 505 506 IF_AFDATA_RLOCK(ifp); 507 switch (dst->sa_family) { 508 case AF_INET: 509 la = lla_lookup(LLTABLE(ifp), 0, dst); 510 break; 511 case AF_INET6: 512 la = lla_lookup(LLTABLE6(ifp), 0, dst); 513 break; 514 default: 515 la = NULL; 516 KASSERTMSG(0, "Invalid AF=%d\n", dst->sa_family); 517 break; 518 } 519 IF_AFDATA_RUNLOCK(ifp); 520 521 void *a = (LLE_IS_VALID(la) && (la->la_flags & LLE_VALID) == LLE_VALID) 522 ? &la->ll_addr : NULL; 523 524 a = sockaddr_dl_init(sdl, sizeof(*sdl), ifp->if_index, ifp->if_type, 525 NULL, 0, a, ifp->if_addrlen); 526 KASSERT(a != NULL); 527 528 if (la != NULL) { 529 *flags = la->la_flags; 530 LLE_RUNLOCK(la); 531 } 532 } 533 534 static int 535 route_output_report(struct rtentry *rt, struct rt_addrinfo *info, 536 struct rt_xmsghdr *rtm, struct rt_xmsghdr **new_rtm) 537 { 538 int len; 539 540 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 541 const struct ifaddr *rtifa; 542 const struct ifnet *ifp = rt->rt_ifp; 543 544 info->rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 545 /* rtifa used to be simply rt->rt_ifa. 546 * If rt->rt_ifa != NULL, then 547 * rt_get_ifa() != NULL. So this 548 * ought to still be safe. --dyoung 549 */ 550 rtifa = rt_get_ifa(rt); 551 info->rti_info[RTAX_IFA] = rtifa->ifa_addr; 552 #ifdef RTSOCK_DEBUG 553 if (info->rti_info[RTAX_IFA]->sa_family == AF_INET) { 554 char ibuf[INET_ADDRSTRLEN]; 555 char abuf[INET_ADDRSTRLEN]; 556 printf("%s: copying out RTAX_IFA %s " 557 "for info->rti_info[RTAX_DST] %s " 558 "ifa_getifa %p ifa_seqno %p\n", 559 __func__, 560 RT_IN_PRINT(info, ibuf, RTAX_IFA), 561 RT_IN_PRINT(info, abuf, RTAX_DST), 562 (void *)rtifa->ifa_getifa, 563 rtifa->ifa_seqno); 564 } 565 #endif /* RTSOCK_DEBUG */ 566 if (ifp->if_flags & IFF_POINTOPOINT) 567 info->rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 568 else 569 info->rti_info[RTAX_BRD] = NULL; 570 rtm->rtm_index = ifp->if_index; 571 } 572 (void)rt_msg2(rtm->rtm_type, info, NULL, NULL, &len); 573 if (len > rtm->rtm_msglen) { 574 struct rt_xmsghdr *old_rtm = rtm; 575 R_Malloc(*new_rtm, struct rt_xmsghdr *, len); 576 if (*new_rtm == NULL) 577 return ENOBUFS; 578 (void)memcpy(*new_rtm, old_rtm, old_rtm->rtm_msglen); 579 rtm = *new_rtm; 580 } 581 (void)rt_msg2(rtm->rtm_type, info, rtm, NULL, 0); 582 rtm->rtm_flags = rt->rt_flags; 583 rtm_setmetrics(rt, rtm); 584 rtm->rtm_addrs = info->rti_addrs; 585 586 return 0; 587 } 588 589 static struct ifaddr * 590 route_output_get_ifa(const struct rt_addrinfo info, const struct rtentry *rt, 591 struct ifnet **ifp, struct psref *psref) 592 { 593 struct ifaddr *ifa = NULL; 594 595 *ifp = NULL; 596 if (info.rti_info[RTAX_IFP] != NULL) { 597 ifa = ifa_ifwithnet_psref(info.rti_info[RTAX_IFP], psref); 598 if (ifa == NULL) 599 goto next; 600 *ifp = ifa->ifa_ifp; 601 if (info.rti_info[RTAX_IFA] == NULL && 602 info.rti_info[RTAX_GATEWAY] == NULL) 603 goto next; 604 if (info.rti_info[RTAX_IFA] == NULL) { 605 /* route change <dst> <gw> -ifp <if> */ 606 ifa = ifaof_ifpforaddr_psref(info.rti_info[RTAX_GATEWAY], 607 *ifp, psref); 608 } else { 609 /* route change <dst> -ifp <if> -ifa <addr> */ 610 ifa = ifa_ifwithaddr_psref(info.rti_info[RTAX_IFA], psref); 611 if (ifa != NULL) 612 goto out; 613 ifa = ifaof_ifpforaddr_psref(info.rti_info[RTAX_IFA], 614 *ifp, psref); 615 } 616 goto out; 617 } 618 next: 619 if (info.rti_info[RTAX_IFA] != NULL) { 620 /* route change <dst> <gw> -ifa <addr> */ 621 ifa = ifa_ifwithaddr_psref(info.rti_info[RTAX_IFA], psref); 622 if (ifa != NULL) 623 goto out; 624 } 625 if (info.rti_info[RTAX_GATEWAY] != NULL) { 626 /* route change <dst> <gw> */ 627 ifa = ifa_ifwithroute_psref(rt->rt_flags, rt_getkey(rt), 628 info.rti_info[RTAX_GATEWAY], psref); 629 } 630 out: 631 if (ifa != NULL && *ifp == NULL) 632 *ifp = ifa->ifa_ifp; 633 return ifa; 634 } 635 636 static int 637 route_output_change(struct rtentry *rt, struct rt_addrinfo *info, 638 struct rt_xmsghdr *rtm) 639 { 640 int error = 0; 641 struct ifnet *ifp = NULL, *new_ifp; 642 struct ifaddr *ifa = NULL, *new_ifa; 643 struct psref psref_ifa, psref_new_ifa, psref_ifp; 644 bool newgw, ifp_changed = false; 645 646 /* 647 * New gateway could require new ifaddr, ifp; 648 * flags may also be different; ifp may be specified 649 * by ll sockaddr when protocol address is ambiguous 650 */ 651 newgw = info->rti_info[RTAX_GATEWAY] != NULL && 652 sockaddr_cmp(info->rti_info[RTAX_GATEWAY], rt->rt_gateway) != 0; 653 654 if (newgw || info->rti_info[RTAX_IFP] != NULL || 655 info->rti_info[RTAX_IFA] != NULL) { 656 ifp = rt_getifp(info, &psref_ifp); 657 ifa = rt_getifa(info, &psref_ifa); 658 if (ifa == NULL) { 659 error = ENETUNREACH; 660 goto out; 661 } 662 } 663 if (newgw) { 664 error = rt_setgate(rt, info->rti_info[RTAX_GATEWAY]); 665 if (error != 0) 666 goto out; 667 } 668 if (info->rti_info[RTAX_TAG]) { 669 const struct sockaddr *tag; 670 tag = rt_settag(rt, info->rti_info[RTAX_TAG]); 671 if (tag == NULL) { 672 error = ENOBUFS; 673 goto out; 674 } 675 } 676 /* 677 * New gateway could require new ifaddr, ifp; 678 * flags may also be different; ifp may be specified 679 * by ll sockaddr when protocol address is ambiguous 680 */ 681 new_ifa = route_output_get_ifa(*info, rt, &new_ifp, &psref_new_ifa); 682 if (new_ifa != NULL) { 683 ifa_release(ifa, &psref_ifa); 684 ifa = new_ifa; 685 } 686 if (ifa) { 687 struct ifaddr *oifa = rt->rt_ifa; 688 if (oifa != ifa && !ifa_is_destroying(ifa) && 689 new_ifp != NULL && !if_is_deactivated(new_ifp)) { 690 if (oifa && oifa->ifa_rtrequest) 691 oifa->ifa_rtrequest(RTM_DELETE, rt, info); 692 rt_replace_ifa(rt, ifa); 693 rt->rt_ifp = new_ifp; 694 ifp_changed = true; 695 } 696 if (new_ifa == NULL) 697 ifa_release(ifa, &psref_ifa); 698 } 699 ifa_release(new_ifa, &psref_new_ifa); 700 if (new_ifp && rt->rt_ifp != new_ifp && !if_is_deactivated(new_ifp)) { 701 rt->rt_ifp = new_ifp; 702 ifp_changed = true; 703 } 704 rt_setmetrics(rtm->rtm_inits, rtm, rt); 705 if (rt->rt_flags != info->rti_flags) { 706 rt->rt_flags = (info->rti_flags & ~PRESERVED_RTF) | 707 (rt->rt_flags & PRESERVED_RTF); 708 } 709 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 710 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, info); 711 #if defined(INET) || defined(INET6) 712 if (ifp_changed && rt_mask(rt) != NULL) 713 lltable_prefix_free(rt_getkey(rt)->sa_family, rt_getkey(rt), 714 rt_mask(rt), 0); 715 #else 716 (void)ifp_changed; /* XXX gcc */ 717 #endif 718 out: 719 if_put(ifp, &psref_ifp); 720 721 return error; 722 } 723 724 /*ARGSUSED*/ 725 int 726 COMPATNAME(route_output)(struct mbuf *m, struct socket *so) 727 { 728 struct sockproto proto = { .sp_family = PF_XROUTE, }; 729 struct rt_xmsghdr *rtm = NULL; 730 struct rt_xmsghdr *old_rtm = NULL, *new_rtm = NULL; 731 struct rtentry *rt = NULL; 732 struct rtentry *saved_nrt = NULL; 733 struct rt_addrinfo info; 734 int len, error = 0; 735 sa_family_t family; 736 struct sockaddr_dl sdl; 737 int bound = curlwp_bind(); 738 bool do_rt_free = false; 739 struct sockaddr_storage netmask; 740 741 #define senderr(e) do { error = e; goto flush;} while (/*CONSTCOND*/ 0) 742 if (m == NULL || ((m->m_len < sizeof(int32_t)) && 743 (m = m_pullup(m, sizeof(int32_t))) == NULL)) { 744 error = ENOBUFS; 745 goto out; 746 } 747 if ((m->m_flags & M_PKTHDR) == 0) 748 panic("%s", __func__); 749 len = m->m_pkthdr.len; 750 if (len < sizeof(*rtm) || 751 len != mtod(m, struct rt_xmsghdr *)->rtm_msglen) { 752 info.rti_info[RTAX_DST] = NULL; 753 senderr(EINVAL); 754 } 755 R_Malloc(rtm, struct rt_xmsghdr *, len); 756 if (rtm == NULL) { 757 info.rti_info[RTAX_DST] = NULL; 758 senderr(ENOBUFS); 759 } 760 m_copydata(m, 0, len, rtm); 761 if (rtm->rtm_version != RTM_XVERSION) { 762 info.rti_info[RTAX_DST] = NULL; 763 senderr(EPROTONOSUPPORT); 764 } 765 rtm->rtm_pid = curproc->p_pid; 766 memset(&info, 0, sizeof(info)); 767 info.rti_addrs = rtm->rtm_addrs; 768 if (rt_xaddrs(rtm->rtm_type, (const char *)(rtm + 1), len + (char *)rtm, 769 &info)) { 770 senderr(EINVAL); 771 } 772 info.rti_flags = rtm->rtm_flags; 773 #ifdef RTSOCK_DEBUG 774 if (info.rti_info[RTAX_DST]->sa_family == AF_INET) { 775 char abuf[INET_ADDRSTRLEN]; 776 printf("%s: extracted info.rti_info[RTAX_DST] %s\n", __func__, 777 RT_IN_PRINT(&info, abuf, RTAX_DST)); 778 } 779 #endif /* RTSOCK_DEBUG */ 780 if (info.rti_info[RTAX_DST] == NULL || 781 (info.rti_info[RTAX_DST]->sa_family >= AF_MAX)) { 782 senderr(EINVAL); 783 } 784 if (info.rti_info[RTAX_GATEWAY] != NULL && 785 (info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) { 786 senderr(EINVAL); 787 } 788 789 /* 790 * Verify that the caller has the appropriate privilege; RTM_GET 791 * is the only operation the non-superuser is allowed. 792 */ 793 if (kauth_authorize_network(curlwp->l_cred, KAUTH_NETWORK_ROUTE, 794 0, rtm, NULL, NULL) != 0) 795 senderr(EACCES); 796 797 /* 798 * route(8) passes a sockaddr truncated with prefixlen. 799 * The kernel doesn't expect such sockaddr and need to 800 * use a buffer that is big enough for the sockaddr expected 801 * (padded with 0's). We keep the original length of the sockaddr. 802 */ 803 if (info.rti_info[RTAX_NETMASK]) { 804 socklen_t sa_len = sockaddr_getsize_by_family( 805 info.rti_info[RTAX_NETMASK]->sa_family); 806 socklen_t masklen = sockaddr_getlen( 807 info.rti_info[RTAX_NETMASK]); 808 if (sa_len != 0 && sa_len > masklen) { 809 KASSERT(sa_len <= sizeof(netmask)); 810 memcpy(&netmask, info.rti_info[RTAX_NETMASK], masklen); 811 memset((char *)&netmask + masklen, 0, sa_len - masklen); 812 info.rti_info[RTAX_NETMASK] = sstocsa(&netmask); 813 } 814 } 815 816 switch (rtm->rtm_type) { 817 818 case RTM_ADD: 819 if (info.rti_info[RTAX_GATEWAY] == NULL) { 820 senderr(EINVAL); 821 } 822 #if defined(INET) || defined(INET6) 823 /* support for new ARP/NDP code with keeping backcompat */ 824 if (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) { 825 const struct sockaddr_dl *sdlp = 826 satocsdl(info.rti_info[RTAX_GATEWAY]); 827 828 /* Allow routing requests by interface index */ 829 if (sdlp->sdl_nlen == 0 && sdlp->sdl_alen == 0 830 && sdlp->sdl_slen == 0) 831 goto fallback; 832 /* 833 * Old arp binaries don't set the sdl_index 834 * so we have to complement it. 835 */ 836 int sdl_index = sdlp->sdl_index; 837 if (sdl_index == 0) { 838 error = route_get_sdl_index(&info, &sdl_index); 839 if (error != 0) 840 goto fallback; 841 } else if ( 842 info.rti_info[RTAX_DST]->sa_family == AF_INET) { 843 /* 844 * XXX workaround for SIN_PROXY case; proxy arp 845 * entry should be in an interface that has 846 * a network route including the destination, 847 * not a local (link) route that may not be a 848 * desired place, for example a tap. 849 */ 850 const struct sockaddr_inarp *sina = 851 (const struct sockaddr_inarp *) 852 info.rti_info[RTAX_DST]; 853 if (sina->sin_other & SIN_PROXY) { 854 error = route_get_sdl_index(&info, 855 &sdl_index); 856 if (error != 0) 857 goto fallback; 858 } 859 } 860 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 861 rtm->rtm_rmx.rmx_expire, &info, sdl_index); 862 break; 863 } 864 fallback: 865 #endif /* defined(INET) || defined(INET6) */ 866 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 867 if (error == 0) { 868 rt_setmetrics(rtm->rtm_inits, rtm, saved_nrt); 869 rt_unref(saved_nrt); 870 } 871 break; 872 873 case RTM_DELETE: 874 #if defined(INET) || defined(INET6) 875 /* support for new ARP/NDP code */ 876 if (info.rti_info[RTAX_GATEWAY] && 877 (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) && 878 (rtm->rtm_flags & RTF_LLDATA) != 0) { 879 const struct sockaddr_dl *sdlp = 880 satocsdl(info.rti_info[RTAX_GATEWAY]); 881 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 882 rtm->rtm_rmx.rmx_expire, &info, sdlp->sdl_index); 883 rtm->rtm_flags &= ~RTF_UP; 884 break; 885 } 886 #endif 887 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 888 if (error != 0) 889 break; 890 891 rt = saved_nrt; 892 do_rt_free = true; 893 info.rti_info[RTAX_DST] = rt_getkey(rt); 894 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 895 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 896 info.rti_info[RTAX_TAG] = rt_gettag(rt); 897 error = route_output_report(rt, &info, rtm, &new_rtm); 898 if (error) 899 senderr(error); 900 if (new_rtm != NULL) { 901 old_rtm = rtm; 902 rtm = new_rtm; 903 } 904 break; 905 906 case RTM_GET: 907 case RTM_CHANGE: 908 case RTM_LOCK: 909 /* XXX This will mask info.rti_info[RTAX_DST] with 910 * info.rti_info[RTAX_NETMASK] before 911 * searching. It did not used to do that. --dyoung 912 */ 913 rt = NULL; 914 error = rtrequest1(RTM_GET, &info, &rt); 915 if (error != 0) 916 senderr(error); 917 if (rtm->rtm_type != RTM_GET) {/* XXX: too grotty */ 918 if (memcmp(info.rti_info[RTAX_DST], rt_getkey(rt), 919 info.rti_info[RTAX_DST]->sa_len) != 0) 920 senderr(ESRCH); 921 if (info.rti_info[RTAX_NETMASK] == NULL && 922 rt_mask(rt) != NULL) 923 senderr(ETOOMANYREFS); 924 } 925 926 /* 927 * XXX if arp/ndp requests an L2 entry, we have to obtain 928 * it from lltable while for the route command we have to 929 * return a route as it is. How to distinguish them? 930 * For newer arp/ndp, RTF_LLDATA flag set by arp/ndp 931 * indicates an L2 entry is requested. For old arp/ndp 932 * binaries, we check RTF_UP flag is NOT set; it works 933 * by the fact that arp/ndp don't set it while the route 934 * command sets it. 935 */ 936 if (((rtm->rtm_flags & RTF_LLDATA) != 0 || 937 (rtm->rtm_flags & RTF_UP) == 0) && 938 rtm->rtm_type == RTM_GET && 939 sockaddr_cmp(rt_getkey(rt), info.rti_info[RTAX_DST]) != 0) { 940 int ll_flags = 0; 941 route_get_sdl(rt->rt_ifp, info.rti_info[RTAX_DST], &sdl, 942 &ll_flags); 943 info.rti_info[RTAX_GATEWAY] = sstocsa(&sdl); 944 error = route_output_report(rt, &info, rtm, &new_rtm); 945 if (error) 946 senderr(error); 947 if (new_rtm != NULL) { 948 old_rtm = rtm; 949 rtm = new_rtm; 950 } 951 rtm->rtm_flags |= RTF_LLDATA; 952 rtm->rtm_flags &= ~RTF_CONNECTED; 953 rtm->rtm_flags |= (ll_flags & LLE_STATIC) ? RTF_STATIC : 0; 954 break; 955 } 956 957 switch (rtm->rtm_type) { 958 case RTM_GET: 959 info.rti_info[RTAX_DST] = rt_getkey(rt); 960 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 961 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 962 info.rti_info[RTAX_TAG] = rt_gettag(rt); 963 error = route_output_report(rt, &info, rtm, &new_rtm); 964 if (error) 965 senderr(error); 966 if (new_rtm != NULL) { 967 old_rtm = rtm; 968 rtm = new_rtm; 969 } 970 break; 971 972 case RTM_CHANGE: 973 #ifdef NET_MPSAFE 974 error = rt_update_prepare(rt); 975 if (error == 0) { 976 error = route_output_change(rt, &info, rtm); 977 rt_update_finish(rt); 978 } 979 #else 980 error = route_output_change(rt, &info, rtm); 981 #endif 982 if (error != 0) 983 goto flush; 984 /*FALLTHROUGH*/ 985 case RTM_LOCK: 986 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 987 rt->rt_rmx.rmx_locks |= 988 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 989 break; 990 } 991 break; 992 993 default: 994 senderr(EOPNOTSUPP); 995 } 996 997 flush: 998 if (rtm) { 999 if (error) 1000 rtm->rtm_errno = error; 1001 else 1002 rtm->rtm_flags |= RTF_DONE; 1003 } 1004 family = info.rti_info[RTAX_DST] ? info.rti_info[RTAX_DST]->sa_family : 1005 0; 1006 /* We cannot free old_rtm until we have stopped using the 1007 * pointers in info, some of which may point to sockaddrs 1008 * in old_rtm. 1009 */ 1010 if (old_rtm != NULL) 1011 Free(old_rtm); 1012 if (rt) { 1013 if (do_rt_free) 1014 rt_free(rt); 1015 else 1016 rt_unref(rt); 1017 } 1018 { 1019 struct rawcb *rp = NULL; 1020 /* 1021 * Check to see if we don't want our own messages. 1022 */ 1023 if ((so->so_options & SO_USELOOPBACK) == 0) { 1024 if (COMPATNAME(route_info).ri_cb.any_count <= 1) { 1025 if (rtm) 1026 Free(rtm); 1027 m_freem(m); 1028 goto out; 1029 } 1030 /* There is another listener, so construct message */ 1031 rp = sotorawcb(so); 1032 } 1033 if (rtm) { 1034 m_copyback(m, 0, rtm->rtm_msglen, rtm); 1035 if (m->m_pkthdr.len < rtm->rtm_msglen) { 1036 m_freem(m); 1037 m = NULL; 1038 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 1039 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 1040 Free(rtm); 1041 } 1042 if (rp) 1043 rp->rcb_proto.sp_family = 0; /* Avoid us */ 1044 if (family) 1045 proto.sp_protocol = family; 1046 if (m) 1047 raw_input(m, &proto, &COMPATNAME(route_info).ri_src, 1048 &COMPATNAME(route_info).ri_dst); 1049 if (rp) 1050 rp->rcb_proto.sp_family = PF_XROUTE; 1051 } 1052 out: 1053 curlwp_bindx(bound); 1054 return error; 1055 } 1056 1057 static int 1058 route_ctloutput(int op, struct socket *so, struct sockopt *sopt) 1059 { 1060 struct routecb *rop = sotoroutecb(so); 1061 int error = 0; 1062 unsigned char *rtm_type; 1063 size_t len; 1064 unsigned int msgfilter; 1065 1066 KASSERT(solocked(so)); 1067 1068 if (sopt->sopt_level != AF_ROUTE) { 1069 error = ENOPROTOOPT; 1070 } else switch (op) { 1071 case PRCO_SETOPT: 1072 switch (sopt->sopt_name) { 1073 case RO_MSGFILTER: 1074 msgfilter = 0; 1075 for (rtm_type = sopt->sopt_data, len = sopt->sopt_size; 1076 len != 0; 1077 rtm_type++, len -= sizeof(*rtm_type)) 1078 { 1079 /* Guard against overflowing our storage. */ 1080 if (*rtm_type >= sizeof(msgfilter) * CHAR_BIT) { 1081 error = EOVERFLOW; 1082 break; 1083 } 1084 msgfilter |= RTMSGFILTER(*rtm_type); 1085 } 1086 if (error == 0) 1087 rop->rocb_msgfilter = msgfilter; 1088 break; 1089 default: 1090 error = ENOPROTOOPT; 1091 break; 1092 } 1093 break; 1094 case PRCO_GETOPT: 1095 switch (sopt->sopt_name) { 1096 case RO_MSGFILTER: 1097 error = ENOTSUP; 1098 break; 1099 default: 1100 error = ENOPROTOOPT; 1101 break; 1102 } 1103 } 1104 return error; 1105 } 1106 1107 static void 1108 rt_setmetrics(int which, const struct rt_xmsghdr *in, struct rtentry *out) 1109 { 1110 #define metric(f, e) if (which & (f)) out->rt_rmx.e = in->rtm_rmx.e; 1111 metric(RTV_RPIPE, rmx_recvpipe); 1112 metric(RTV_SPIPE, rmx_sendpipe); 1113 metric(RTV_SSTHRESH, rmx_ssthresh); 1114 metric(RTV_RTT, rmx_rtt); 1115 metric(RTV_RTTVAR, rmx_rttvar); 1116 metric(RTV_HOPCOUNT, rmx_hopcount); 1117 metric(RTV_MTU, rmx_mtu); 1118 #undef metric 1119 if (which & RTV_EXPIRE) { 1120 out->rt_rmx.rmx_expire = in->rtm_rmx.rmx_expire ? 1121 time_wall_to_mono(in->rtm_rmx.rmx_expire) : 0; 1122 } 1123 } 1124 1125 static void 1126 rtm_setmetrics(const struct rtentry *in, struct rt_xmsghdr *out) 1127 { 1128 #define metric(e) out->rtm_rmx.e = in->rt_rmx.e; 1129 metric(rmx_recvpipe); 1130 metric(rmx_sendpipe); 1131 metric(rmx_ssthresh); 1132 metric(rmx_rtt); 1133 metric(rmx_rttvar); 1134 metric(rmx_hopcount); 1135 metric(rmx_mtu); 1136 metric(rmx_locks); 1137 #undef metric 1138 out->rtm_rmx.rmx_expire = in->rt_rmx.rmx_expire ? 1139 time_mono_to_wall(in->rt_rmx.rmx_expire) : 0; 1140 } 1141 1142 static int 1143 rt_xaddrs(u_char rtmtype, const char *cp, const char *cplim, 1144 struct rt_addrinfo *rtinfo) 1145 { 1146 const struct sockaddr *sa = NULL; /* Quell compiler warning */ 1147 int i; 1148 1149 for (i = 0; i < RTAX_MAX && cp < cplim; i++) { 1150 if ((rtinfo->rti_addrs & (1 << i)) == 0) 1151 continue; 1152 rtinfo->rti_info[i] = sa = (const struct sockaddr *)cp; 1153 RT_XADVANCE(cp, sa); 1154 } 1155 1156 /* 1157 * Check for extra addresses specified, except RTM_GET asking 1158 * for interface info. 1159 */ 1160 if (rtmtype == RTM_GET) { 1161 if (((rtinfo->rti_addrs & 1162 (~((1 << RTAX_IFP) | (1 << RTAX_IFA)))) & (~0U << i)) != 0) 1163 return 1; 1164 } else if ((rtinfo->rti_addrs & (~0U << i)) != 0) 1165 return 1; 1166 /* Check for bad data length. */ 1167 if (cp != cplim) { 1168 if (i == RTAX_NETMASK + 1 && sa != NULL && 1169 cp - RT_XROUNDUP(sa->sa_len) + sa->sa_len == cplim) 1170 /* 1171 * The last sockaddr was info.rti_info[RTAX_NETMASK]. 1172 * We accept this for now for the sake of old 1173 * binaries or third party softwares. 1174 */ 1175 ; 1176 else 1177 return 1; 1178 } 1179 return 0; 1180 } 1181 1182 static int 1183 rt_getlen(int type) 1184 { 1185 #ifndef COMPAT_RTSOCK 1186 CTASSERT(__alignof(struct ifa_msghdr) >= sizeof(uint64_t)); 1187 CTASSERT(__alignof(struct if_msghdr) >= sizeof(uint64_t)); 1188 CTASSERT(__alignof(struct if_announcemsghdr) >= sizeof(uint64_t)); 1189 CTASSERT(__alignof(struct rt_msghdr) >= sizeof(uint64_t)); 1190 #endif 1191 1192 switch (type) { 1193 case RTM_ODELADDR: 1194 case RTM_ONEWADDR: 1195 case RTM_OCHGADDR: 1196 #ifdef COMPAT_70 1197 return sizeof(struct ifa_msghdr70); 1198 #else 1199 #ifdef RTSOCK_DEBUG 1200 printf("%s: unsupported RTM type %d\n", __func__, type); 1201 #endif 1202 return -1; 1203 #endif 1204 case RTM_DELADDR: 1205 case RTM_NEWADDR: 1206 case RTM_CHGADDR: 1207 return sizeof(struct ifa_xmsghdr); 1208 1209 case RTM_OOIFINFO: 1210 #ifdef COMPAT_14 1211 return sizeof(struct if_msghdr14); 1212 #else 1213 #ifdef RTSOCK_DEBUG 1214 printf("%s: unsupported RTM type RTM_OOIFINFO\n", __func__); 1215 #endif 1216 return -1; 1217 #endif 1218 case RTM_OIFINFO: 1219 #ifdef COMPAT_50 1220 return sizeof(struct if_msghdr50); 1221 #else 1222 #ifdef RTSOCK_DEBUG 1223 printf("%s: unsupported RTM type RTM_OIFINFO\n", __func__); 1224 #endif 1225 return -1; 1226 #endif 1227 1228 case RTM_IFINFO: 1229 return sizeof(struct if_xmsghdr); 1230 1231 case RTM_IFANNOUNCE: 1232 case RTM_IEEE80211: 1233 return sizeof(struct if_xannouncemsghdr); 1234 1235 default: 1236 return sizeof(struct rt_xmsghdr); 1237 } 1238 } 1239 1240 1241 struct mbuf * 1242 COMPATNAME(rt_msg1)(int type, struct rt_addrinfo *rtinfo, void *data, int datalen) 1243 { 1244 struct rt_xmsghdr *rtm; 1245 struct mbuf *m; 1246 int i; 1247 const struct sockaddr *sa; 1248 int len, dlen; 1249 1250 m = m_gethdr(M_DONTWAIT, MT_DATA); 1251 if (m == NULL) 1252 return m; 1253 MCLAIM(m, &COMPATNAME(routedomain).dom_mowner); 1254 1255 if ((len = rt_getlen(type)) == -1) 1256 goto out; 1257 if (len > MHLEN + MLEN) 1258 panic("%s: message too long", __func__); 1259 else if (len > MHLEN) { 1260 m->m_next = m_get(M_DONTWAIT, MT_DATA); 1261 if (m->m_next == NULL) 1262 goto out; 1263 MCLAIM(m->m_next, m->m_owner); 1264 m->m_pkthdr.len = len; 1265 m->m_len = MHLEN; 1266 m->m_next->m_len = len - MHLEN; 1267 } else { 1268 m->m_pkthdr.len = m->m_len = len; 1269 } 1270 m_reset_rcvif(m); 1271 m_copyback(m, 0, datalen, data); 1272 if (len > datalen) 1273 (void)memset(mtod(m, char *) + datalen, 0, len - datalen); 1274 rtm = mtod(m, struct rt_xmsghdr *); 1275 for (i = 0; i < RTAX_MAX; i++) { 1276 if ((sa = rtinfo->rti_info[i]) == NULL) 1277 continue; 1278 rtinfo->rti_addrs |= (1 << i); 1279 dlen = RT_XROUNDUP(sa->sa_len); 1280 m_copyback(m, len, sa->sa_len, sa); 1281 if (dlen != sa->sa_len) { 1282 /* 1283 * Up to 6 + 1 nul's since roundup is to 1284 * sizeof(uint64_t) (8 bytes) 1285 */ 1286 m_copyback(m, len + sa->sa_len, 1287 dlen - sa->sa_len, "\0\0\0\0\0\0"); 1288 } 1289 len += dlen; 1290 } 1291 if (m->m_pkthdr.len != len) 1292 goto out; 1293 rtm->rtm_msglen = len; 1294 rtm->rtm_version = RTM_XVERSION; 1295 rtm->rtm_type = type; 1296 return m; 1297 out: 1298 m_freem(m); 1299 return NULL; 1300 } 1301 1302 /* 1303 * rt_msg2 1304 * 1305 * fills 'cp' or 'w'.w_tmem with the routing socket message and 1306 * returns the length of the message in 'lenp'. 1307 * 1308 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 1309 * the message 1310 * otherwise walkarg's w_needed is updated and if the user buffer is 1311 * specified and w_needed indicates space exists the information is copied 1312 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 1313 * if the allocation fails ENOBUFS is returned. 1314 */ 1315 static int 1316 rt_msg2(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 1317 int *lenp) 1318 { 1319 int i; 1320 int len, dlen, second_time = 0; 1321 char *cp0, *cp = cpv; 1322 1323 rtinfo->rti_addrs = 0; 1324 again: 1325 if ((len = rt_getlen(type)) == -1) 1326 return EINVAL; 1327 1328 if ((cp0 = cp) != NULL) 1329 cp += len; 1330 for (i = 0; i < RTAX_MAX; i++) { 1331 const struct sockaddr *sa; 1332 1333 if ((sa = rtinfo->rti_info[i]) == NULL) 1334 continue; 1335 rtinfo->rti_addrs |= (1 << i); 1336 dlen = RT_XROUNDUP(sa->sa_len); 1337 if (cp) { 1338 int diff = dlen - sa->sa_len; 1339 (void)memcpy(cp, sa, (size_t)sa->sa_len); 1340 cp += sa->sa_len; 1341 if (diff > 0) { 1342 (void)memset(cp, 0, (size_t)diff); 1343 cp += diff; 1344 } 1345 } 1346 len += dlen; 1347 } 1348 if (cp == NULL && w != NULL && !second_time) { 1349 struct rt_walkarg *rw = w; 1350 1351 rw->w_needed += len; 1352 if (rw->w_needed <= 0 && rw->w_where) { 1353 if (rw->w_tmemsize < len) { 1354 if (rw->w_tmem) 1355 kmem_free(rw->w_tmem, rw->w_tmemsize); 1356 rw->w_tmem = kmem_alloc(len, KM_SLEEP); 1357 rw->w_tmemsize = len; 1358 } 1359 if (rw->w_tmem) { 1360 cp = rw->w_tmem; 1361 second_time = 1; 1362 goto again; 1363 } else { 1364 rw->w_tmemneeded = len; 1365 return ENOBUFS; 1366 } 1367 } 1368 } 1369 if (cp) { 1370 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)cp0; 1371 1372 rtm->rtm_version = RTM_XVERSION; 1373 rtm->rtm_type = type; 1374 rtm->rtm_msglen = len; 1375 } 1376 if (lenp) 1377 *lenp = len; 1378 return 0; 1379 } 1380 1381 #ifndef COMPAT_RTSOCK 1382 int 1383 rt_msg3(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 1384 int *lenp) 1385 { 1386 return rt_msg2(type, rtinfo, cpv, w, lenp); 1387 } 1388 #endif 1389 1390 /* 1391 * This routine is called to generate a message from the routing 1392 * socket indicating that a redirect has occurred, a routing lookup 1393 * has failed, or that a protocol has detected timeouts to a particular 1394 * destination. 1395 */ 1396 void 1397 COMPATNAME(rt_missmsg)(int type, const struct rt_addrinfo *rtinfo, int flags, 1398 int error) 1399 { 1400 struct rt_xmsghdr rtm; 1401 struct mbuf *m; 1402 const struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 1403 struct rt_addrinfo info = *rtinfo; 1404 1405 COMPATCALL(rt_missmsg, (type, rtinfo, flags, error)); 1406 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1407 return; 1408 memset(&rtm, 0, sizeof(rtm)); 1409 rtm.rtm_pid = curproc->p_pid; 1410 rtm.rtm_flags = RTF_DONE | flags; 1411 rtm.rtm_errno = error; 1412 m = COMPATNAME(rt_msg1)(type, &info, &rtm, sizeof(rtm)); 1413 if (m == NULL) 1414 return; 1415 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1416 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1417 } 1418 1419 /* 1420 * This routine is called to generate a message from the routing 1421 * socket indicating that the status of a network interface has changed. 1422 */ 1423 void 1424 COMPATNAME(rt_ifmsg)(struct ifnet *ifp) 1425 { 1426 struct if_xmsghdr ifm; 1427 struct mbuf *m; 1428 struct rt_addrinfo info; 1429 1430 COMPATCALL(rt_ifmsg, (ifp)); 1431 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1432 return; 1433 (void)memset(&info, 0, sizeof(info)); 1434 (void)memset(&ifm, 0, sizeof(ifm)); 1435 ifm.ifm_index = ifp->if_index; 1436 ifm.ifm_flags = ifp->if_flags; 1437 ifm.ifm_data = ifp->if_data; 1438 ifm.ifm_addrs = 0; 1439 m = COMPATNAME(rt_msg1)(RTM_IFINFO, &info, &ifm, sizeof(ifm)); 1440 if (m == NULL) 1441 return; 1442 COMPATNAME(route_enqueue)(m, 0); 1443 #ifdef COMPAT_14 1444 compat_14_rt_oifmsg(ifp); 1445 #endif 1446 #ifdef COMPAT_50 1447 compat_50_rt_oifmsg(ifp); 1448 #endif 1449 } 1450 1451 #ifndef COMPAT_RTSOCK 1452 static int 1453 if_addrflags(struct ifaddr *ifa) 1454 { 1455 1456 switch (ifa->ifa_addr->sa_family) { 1457 #ifdef INET 1458 case AF_INET: 1459 return ((struct in_ifaddr *)ifa)->ia4_flags; 1460 #endif 1461 #ifdef INET6 1462 case AF_INET6: 1463 return ((struct in6_ifaddr *)ifa)->ia6_flags; 1464 #endif 1465 default: 1466 return 0; 1467 } 1468 } 1469 #endif 1470 1471 /* 1472 * This is called to generate messages from the routing socket 1473 * indicating a network interface has had addresses associated with it. 1474 * if we ever reverse the logic and replace messages TO the routing 1475 * socket indicate a request to configure interfaces, then it will 1476 * be unnecessary as the routing socket will automatically generate 1477 * copies of it. 1478 */ 1479 void 1480 COMPATNAME(rt_newaddrmsg)(int cmd, struct ifaddr *ifa, int error, 1481 struct rtentry *rt) 1482 { 1483 #define cmdpass(__cmd, __pass) (((__cmd) << 2) | (__pass)) 1484 struct rt_addrinfo info; 1485 const struct sockaddr *sa; 1486 int pass; 1487 struct mbuf *m; 1488 struct ifnet *ifp; 1489 struct rt_xmsghdr rtm; 1490 struct ifa_xmsghdr ifam; 1491 int ncmd; 1492 1493 KASSERT(ifa != NULL); 1494 KASSERT(ifa->ifa_addr != NULL); 1495 ifp = ifa->ifa_ifp; 1496 #ifdef SCTP 1497 if (cmd == RTM_ADD) { 1498 sctp_add_ip_address(ifa); 1499 } else if (cmd == RTM_DELETE) { 1500 sctp_delete_ip_address(ifa); 1501 } 1502 #endif 1503 1504 COMPATCALL(rt_newaddrmsg, (cmd, ifa, error, rt)); 1505 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1506 return; 1507 for (pass = 1; pass < 3; pass++) { 1508 memset(&info, 0, sizeof(info)); 1509 switch (cmdpass(cmd, pass)) { 1510 case cmdpass(RTM_ADD, 1): 1511 case cmdpass(RTM_CHANGE, 1): 1512 case cmdpass(RTM_DELETE, 2): 1513 case cmdpass(RTM_NEWADDR, 1): 1514 case cmdpass(RTM_DELADDR, 1): 1515 case cmdpass(RTM_CHGADDR, 1): 1516 switch (cmd) { 1517 case RTM_ADD: 1518 ncmd = RTM_XNEWADDR; 1519 break; 1520 case RTM_DELETE: 1521 ncmd = RTM_XDELADDR; 1522 break; 1523 case RTM_CHANGE: 1524 ncmd = RTM_XCHGADDR; 1525 break; 1526 case RTM_NEWADDR: 1527 ncmd = RTM_XNEWADDR; 1528 break; 1529 case RTM_DELADDR: 1530 ncmd = RTM_XDELADDR; 1531 break; 1532 case RTM_CHGADDR: 1533 ncmd = RTM_XCHGADDR; 1534 break; 1535 default: 1536 panic("%s: unknown command %d", __func__, cmd); 1537 } 1538 #ifdef COMPAT_70 1539 compat_70_rt_newaddrmsg1(ncmd, ifa); 1540 #endif 1541 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; 1542 KASSERT(ifp->if_dl != NULL); 1543 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1544 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1545 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1546 memset(&ifam, 0, sizeof(ifam)); 1547 ifam.ifam_index = ifp->if_index; 1548 ifam.ifam_metric = ifa->ifa_metric; 1549 ifam.ifam_flags = ifa->ifa_flags; 1550 #ifndef COMPAT_RTSOCK 1551 ifam.ifam_pid = curproc->p_pid; 1552 ifam.ifam_addrflags = if_addrflags(ifa); 1553 #endif 1554 m = COMPATNAME(rt_msg1)(ncmd, &info, &ifam, sizeof(ifam)); 1555 if (m == NULL) 1556 continue; 1557 mtod(m, struct ifa_xmsghdr *)->ifam_addrs = 1558 info.rti_addrs; 1559 break; 1560 case cmdpass(RTM_ADD, 2): 1561 case cmdpass(RTM_CHANGE, 2): 1562 case cmdpass(RTM_DELETE, 1): 1563 if (rt == NULL) 1564 continue; 1565 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1566 info.rti_info[RTAX_DST] = sa = rt_getkey(rt); 1567 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1568 memset(&rtm, 0, sizeof(rtm)); 1569 rtm.rtm_pid = curproc->p_pid; 1570 rtm.rtm_index = ifp->if_index; 1571 rtm.rtm_flags |= rt->rt_flags; 1572 rtm.rtm_errno = error; 1573 m = COMPATNAME(rt_msg1)(cmd, &info, &rtm, sizeof(rtm)); 1574 if (m == NULL) 1575 continue; 1576 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1577 break; 1578 default: 1579 continue; 1580 } 1581 KASSERTMSG(m != NULL, "called with wrong command"); 1582 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1583 } 1584 #undef cmdpass 1585 1586 } 1587 1588 static struct mbuf * 1589 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1590 struct rt_addrinfo *info) 1591 { 1592 struct if_xannouncemsghdr ifan; 1593 1594 memset(info, 0, sizeof(*info)); 1595 memset(&ifan, 0, sizeof(ifan)); 1596 ifan.ifan_index = ifp->if_index; 1597 strlcpy(ifan.ifan_name, ifp->if_xname, sizeof(ifan.ifan_name)); 1598 ifan.ifan_what = what; 1599 return COMPATNAME(rt_msg1)(type, info, &ifan, sizeof(ifan)); 1600 } 1601 1602 /* 1603 * This is called to generate routing socket messages indicating 1604 * network interface arrival and departure. 1605 */ 1606 void 1607 COMPATNAME(rt_ifannouncemsg)(struct ifnet *ifp, int what) 1608 { 1609 struct mbuf *m; 1610 struct rt_addrinfo info; 1611 1612 COMPATCALL(rt_ifannouncemsg, (ifp, what)); 1613 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1614 return; 1615 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); 1616 if (m == NULL) 1617 return; 1618 COMPATNAME(route_enqueue)(m, 0); 1619 } 1620 1621 /* 1622 * This is called to generate routing socket messages indicating 1623 * IEEE80211 wireless events. 1624 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1625 */ 1626 void 1627 COMPATNAME(rt_ieee80211msg)(struct ifnet *ifp, int what, void *data, 1628 size_t data_len) 1629 { 1630 struct mbuf *m; 1631 struct rt_addrinfo info; 1632 1633 COMPATCALL(rt_ieee80211msg, (ifp, what, data, data_len)); 1634 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1635 return; 1636 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1637 if (m == NULL) 1638 return; 1639 /* 1640 * Append the ieee80211 data. Try to stick it in the 1641 * mbuf containing the ifannounce msg; otherwise allocate 1642 * a new mbuf and append. 1643 * 1644 * NB: we assume m is a single mbuf. 1645 */ 1646 if (data_len > M_TRAILINGSPACE(m)) { 1647 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 1648 if (n == NULL) { 1649 m_freem(m); 1650 return; 1651 } 1652 (void)memcpy(mtod(n, void *), data, data_len); 1653 n->m_len = data_len; 1654 m->m_next = n; 1655 } else if (data_len > 0) { 1656 (void)memcpy(mtod(m, uint8_t *) + m->m_len, data, data_len); 1657 m->m_len += data_len; 1658 } 1659 if (m->m_flags & M_PKTHDR) 1660 m->m_pkthdr.len += data_len; 1661 mtod(m, struct if_xannouncemsghdr *)->ifan_msglen += data_len; 1662 COMPATNAME(route_enqueue)(m, 0); 1663 } 1664 1665 #ifndef COMPAT_RTSOCK 1666 /* 1667 * Send a routing message as mimicing that a cloned route is added. 1668 */ 1669 void 1670 rt_clonedmsg(const struct sockaddr *dst, const struct ifnet *ifp, 1671 const struct rtentry *rt) 1672 { 1673 struct rt_addrinfo info; 1674 /* Mimic flags exactly */ 1675 #define RTF_LLINFO 0x400 1676 #define RTF_CLONED 0x2000 1677 int flags = RTF_UP | RTF_HOST | RTF_DONE | RTF_LLINFO | RTF_CLONED; 1678 union { 1679 struct sockaddr sa; 1680 struct sockaddr_storage ss; 1681 struct sockaddr_dl sdl; 1682 } u; 1683 uint8_t namelen = strlen(ifp->if_xname); 1684 uint8_t addrlen = ifp->if_addrlen; 1685 1686 if (rt == NULL) 1687 return; /* XXX */ 1688 1689 memset(&info, 0, sizeof(info)); 1690 info.rti_info[RTAX_DST] = dst; 1691 sockaddr_dl_init(&u.sdl, sizeof(u.ss), ifp->if_index, ifp->if_type, 1692 NULL, namelen, NULL, addrlen); 1693 info.rti_info[RTAX_GATEWAY] = &u.sa; 1694 1695 rt_missmsg(RTM_ADD, &info, flags, 0); 1696 #undef RTF_LLINFO 1697 #undef RTF_CLONED 1698 } 1699 #endif /* COMPAT_RTSOCK */ 1700 1701 /* 1702 * This is used in dumping the kernel table via sysctl(). 1703 */ 1704 static int 1705 sysctl_dumpentry(struct rtentry *rt, void *v) 1706 { 1707 struct rt_walkarg *w = v; 1708 int error = 0, size; 1709 struct rt_addrinfo info; 1710 1711 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1712 return 0; 1713 memset(&info, 0, sizeof(info)); 1714 info.rti_info[RTAX_DST] = rt_getkey(rt); 1715 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1716 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1717 info.rti_info[RTAX_TAG] = rt_gettag(rt); 1718 if (rt->rt_ifp) { 1719 const struct ifaddr *rtifa; 1720 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_dl->ifa_addr; 1721 /* rtifa used to be simply rt->rt_ifa. If rt->rt_ifa != NULL, 1722 * then rt_get_ifa() != NULL. So this ought to still be safe. 1723 * --dyoung 1724 */ 1725 rtifa = rt_get_ifa(rt); 1726 info.rti_info[RTAX_IFA] = rtifa->ifa_addr; 1727 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1728 info.rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 1729 } 1730 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 1731 return error; 1732 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1733 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)w->w_tmem; 1734 1735 rtm->rtm_flags = rt->rt_flags; 1736 rtm->rtm_use = rt->rt_use; 1737 rtm_setmetrics(rt, rtm); 1738 KASSERT(rt->rt_ifp != NULL); 1739 rtm->rtm_index = rt->rt_ifp->if_index; 1740 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1741 rtm->rtm_addrs = info.rti_addrs; 1742 if ((error = copyout(rtm, w->w_where, size)) != 0) 1743 w->w_where = NULL; 1744 else 1745 w->w_where = (char *)w->w_where + size; 1746 } 1747 return error; 1748 } 1749 1750 static int 1751 sysctl_iflist_if(struct ifnet *ifp, struct rt_walkarg *w, 1752 struct rt_addrinfo *info, size_t len) 1753 { 1754 struct if_xmsghdr *ifm; 1755 int error; 1756 1757 ifm = (struct if_xmsghdr *)w->w_tmem; 1758 ifm->ifm_index = ifp->if_index; 1759 ifm->ifm_flags = ifp->if_flags; 1760 ifm->ifm_data = ifp->if_data; 1761 ifm->ifm_addrs = info->rti_addrs; 1762 if ((error = copyout(ifm, w->w_where, len)) == 0) 1763 w->w_where = (char *)w->w_where + len; 1764 return error; 1765 } 1766 1767 static int 1768 sysctl_iflist_addr(struct rt_walkarg *w, struct ifaddr *ifa, 1769 struct rt_addrinfo *info) 1770 { 1771 int len, error; 1772 1773 if ((error = rt_msg2(RTM_XNEWADDR, info, 0, w, &len))) 1774 return error; 1775 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1776 struct ifa_xmsghdr *ifam; 1777 1778 ifam = (struct ifa_xmsghdr *)w->w_tmem; 1779 ifam->ifam_index = ifa->ifa_ifp->if_index; 1780 ifam->ifam_flags = ifa->ifa_flags; 1781 ifam->ifam_metric = ifa->ifa_metric; 1782 ifam->ifam_addrs = info->rti_addrs; 1783 #ifndef COMPAT_RTSOCK 1784 ifam->ifam_pid = 0; 1785 ifam->ifam_addrflags = if_addrflags(ifa); 1786 #endif 1787 if ((error = copyout(w->w_tmem, w->w_where, len)) == 0) 1788 w->w_where = (char *)w->w_where + len; 1789 } 1790 return error; 1791 } 1792 1793 static int 1794 sysctl_iflist(int af, struct rt_walkarg *w, int type) 1795 { 1796 struct ifnet *ifp; 1797 struct ifaddr *ifa; 1798 struct rt_addrinfo info; 1799 int cmd, len, error = 0; 1800 int (*iflist_if)(struct ifnet *, struct rt_walkarg *, 1801 struct rt_addrinfo *, size_t); 1802 int (*iflist_addr)(struct rt_walkarg *, struct ifaddr *, 1803 struct rt_addrinfo *); 1804 int s; 1805 struct psref psref; 1806 int bound; 1807 1808 switch (type) { 1809 case NET_RT_IFLIST: 1810 cmd = RTM_IFINFO; 1811 iflist_if = sysctl_iflist_if; 1812 iflist_addr = sysctl_iflist_addr; 1813 break; 1814 #ifdef COMPAT_14 1815 case NET_RT_OOOIFLIST: 1816 cmd = RTM_OOIFINFO; 1817 iflist_if = compat_14_iflist; 1818 iflist_addr = compat_70_iflist_addr; 1819 break; 1820 #endif 1821 #ifdef COMPAT_50 1822 case NET_RT_OOIFLIST: 1823 cmd = RTM_OIFINFO; 1824 iflist_if = compat_50_iflist; 1825 iflist_addr = compat_70_iflist_addr; 1826 break; 1827 #endif 1828 #ifdef COMPAT_70 1829 case NET_RT_OIFLIST: 1830 cmd = RTM_IFINFO; 1831 iflist_if = sysctl_iflist_if; 1832 iflist_addr = compat_70_iflist_addr; 1833 break; 1834 #endif 1835 default: 1836 #ifdef RTSOCK_DEBUG 1837 printf("%s: unsupported IFLIST type %d\n", __func__, type); 1838 #endif 1839 return EINVAL; 1840 } 1841 1842 memset(&info, 0, sizeof(info)); 1843 1844 bound = curlwp_bind(); 1845 s = pserialize_read_enter(); 1846 IFNET_READER_FOREACH(ifp) { 1847 int _s; 1848 if (w->w_arg && w->w_arg != ifp->if_index) 1849 continue; 1850 if (IFADDR_READER_EMPTY(ifp)) 1851 continue; 1852 1853 if_acquire(ifp, &psref); 1854 pserialize_read_exit(s); 1855 1856 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1857 if ((error = rt_msg2(cmd, &info, NULL, w, &len)) != 0) 1858 goto release_exit; 1859 info.rti_info[RTAX_IFP] = NULL; 1860 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1861 if ((error = iflist_if(ifp, w, &info, len)) != 0) 1862 goto release_exit; 1863 } 1864 _s = pserialize_read_enter(); 1865 IFADDR_READER_FOREACH(ifa, ifp) { 1866 struct psref _psref; 1867 if (af && af != ifa->ifa_addr->sa_family) 1868 continue; 1869 ifa_acquire(ifa, &_psref); 1870 pserialize_read_exit(_s); 1871 1872 info.rti_info[RTAX_IFA] = ifa->ifa_addr; 1873 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1874 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1875 error = iflist_addr(w, ifa, &info); 1876 1877 _s = pserialize_read_enter(); 1878 ifa_release(ifa, &_psref); 1879 if (error != 0) { 1880 pserialize_read_exit(_s); 1881 goto release_exit; 1882 } 1883 } 1884 pserialize_read_exit(_s); 1885 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] = 1886 info.rti_info[RTAX_BRD] = NULL; 1887 1888 s = pserialize_read_enter(); 1889 if_release(ifp, &psref); 1890 } 1891 pserialize_read_exit(s); 1892 curlwp_bindx(bound); 1893 1894 return 0; 1895 1896 release_exit: 1897 if_release(ifp, &psref); 1898 curlwp_bindx(bound); 1899 return error; 1900 } 1901 1902 static int 1903 sysctl_rtable(SYSCTLFN_ARGS) 1904 { 1905 void *where = oldp; 1906 size_t *given = oldlenp; 1907 int i, s, error = EINVAL; 1908 u_char af; 1909 struct rt_walkarg w; 1910 1911 if (namelen == 1 && name[0] == CTL_QUERY) 1912 return sysctl_query(SYSCTLFN_CALL(rnode)); 1913 1914 if (newp) 1915 return EPERM; 1916 if (namelen != 3) 1917 return EINVAL; 1918 af = name[0]; 1919 w.w_tmemneeded = 0; 1920 w.w_tmemsize = 0; 1921 w.w_tmem = NULL; 1922 again: 1923 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 1924 if (w.w_tmemneeded) { 1925 w.w_tmem = kmem_alloc(w.w_tmemneeded, KM_SLEEP); 1926 w.w_tmemsize = w.w_tmemneeded; 1927 w.w_tmemneeded = 0; 1928 } 1929 w.w_op = name[1]; 1930 w.w_arg = name[2]; 1931 w.w_given = *given; 1932 w.w_needed = 0 - w.w_given; 1933 w.w_where = where; 1934 1935 s = splsoftnet(); 1936 switch (w.w_op) { 1937 1938 case NET_RT_DUMP: 1939 case NET_RT_FLAGS: 1940 #if defined(INET) || defined(INET6) 1941 /* 1942 * take care of llinfo entries, the caller must 1943 * specify an AF 1944 */ 1945 if (w.w_op == NET_RT_FLAGS && 1946 (w.w_arg == 0 || w.w_arg & RTF_LLDATA)) { 1947 if (af != 0) 1948 error = lltable_sysctl_dump(af, &w); 1949 else 1950 error = EINVAL; 1951 break; 1952 } 1953 #endif 1954 1955 for (i = 1; i <= AF_MAX; i++) { 1956 if (af == 0 || af == i) { 1957 error = rt_walktree(i, sysctl_dumpentry, &w); 1958 if (error != 0) 1959 break; 1960 #if defined(INET) || defined(INET6) 1961 /* 1962 * Return ARP/NDP entries too for 1963 * backward compatibility. 1964 */ 1965 error = lltable_sysctl_dump(i, &w); 1966 if (error != 0) 1967 break; 1968 #endif 1969 } 1970 } 1971 break; 1972 1973 #ifdef COMPAT_14 1974 case NET_RT_OOOIFLIST: 1975 error = sysctl_iflist(af, &w, w.w_op); 1976 break; 1977 #endif 1978 #ifdef COMPAT_50 1979 case NET_RT_OOIFLIST: 1980 error = sysctl_iflist(af, &w, w.w_op); 1981 break; 1982 #endif 1983 #ifdef COMPAT_70 1984 case NET_RT_OIFLIST: 1985 error = sysctl_iflist(af, &w, w.w_op); 1986 break; 1987 #endif 1988 case NET_RT_IFLIST: 1989 error = sysctl_iflist(af, &w, w.w_op); 1990 break; 1991 } 1992 splx(s); 1993 1994 /* check to see if we couldn't allocate memory with NOWAIT */ 1995 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 1996 goto again; 1997 1998 if (w.w_tmem) 1999 kmem_free(w.w_tmem, w.w_tmemsize); 2000 w.w_needed += w.w_given; 2001 if (where) { 2002 *given = (char *)w.w_where - (char *)where; 2003 if (*given < w.w_needed) 2004 return ENOMEM; 2005 } else { 2006 *given = (11 * w.w_needed) / 10; 2007 } 2008 return error; 2009 } 2010 2011 /* 2012 * Routing message software interrupt routine 2013 */ 2014 static void 2015 COMPATNAME(route_intr)(void *cookie) 2016 { 2017 struct sockproto proto = { .sp_family = PF_XROUTE, }; 2018 struct route_info * const ri = &COMPATNAME(route_info); 2019 struct mbuf *m; 2020 2021 mutex_enter(softnet_lock); 2022 KERNEL_LOCK(1, NULL); 2023 for (;;) { 2024 IFQ_LOCK(&ri->ri_intrq); 2025 IF_DEQUEUE(&ri->ri_intrq, m); 2026 IFQ_UNLOCK(&ri->ri_intrq); 2027 if (m == NULL) 2028 break; 2029 proto.sp_protocol = M_GETCTX(m, uintptr_t); 2030 raw_input(m, &proto, &ri->ri_src, &ri->ri_dst); 2031 } 2032 KERNEL_UNLOCK_ONE(NULL); 2033 mutex_exit(softnet_lock); 2034 } 2035 2036 /* 2037 * Enqueue a message to the software interrupt routine. 2038 */ 2039 void 2040 COMPATNAME(route_enqueue)(struct mbuf *m, int family) 2041 { 2042 struct route_info * const ri = &COMPATNAME(route_info); 2043 int wasempty; 2044 2045 IFQ_LOCK(&ri->ri_intrq); 2046 if (IF_QFULL(&ri->ri_intrq)) { 2047 IF_DROP(&ri->ri_intrq); 2048 IFQ_UNLOCK(&ri->ri_intrq); 2049 m_freem(m); 2050 } else { 2051 wasempty = IF_IS_EMPTY(&ri->ri_intrq); 2052 M_SETCTX(m, (uintptr_t)family); 2053 IF_ENQUEUE(&ri->ri_intrq, m); 2054 IFQ_UNLOCK(&ri->ri_intrq); 2055 if (wasempty) { 2056 kpreempt_disable(); 2057 softint_schedule(ri->ri_sih); 2058 kpreempt_enable(); 2059 } 2060 } 2061 } 2062 2063 static void 2064 COMPATNAME(route_init)(void) 2065 { 2066 struct route_info * const ri = &COMPATNAME(route_info); 2067 2068 #ifndef COMPAT_RTSOCK 2069 rt_init(); 2070 #endif 2071 2072 sysctl_net_route_setup(NULL); 2073 ri->ri_intrq.ifq_maxlen = ri->ri_maxqlen; 2074 ri->ri_sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 2075 COMPATNAME(route_intr), NULL); 2076 IFQ_LOCK_INIT(&ri->ri_intrq); 2077 } 2078 2079 /* 2080 * Definitions of protocols supported in the ROUTE domain. 2081 */ 2082 #ifndef COMPAT_RTSOCK 2083 PR_WRAP_USRREQS(route); 2084 #else 2085 PR_WRAP_USRREQS(compat_50_route); 2086 #endif 2087 2088 static const struct pr_usrreqs route_usrreqs = { 2089 .pr_attach = COMPATNAME(route_attach_wrapper), 2090 .pr_detach = COMPATNAME(route_detach_wrapper), 2091 .pr_accept = COMPATNAME(route_accept_wrapper), 2092 .pr_bind = COMPATNAME(route_bind_wrapper), 2093 .pr_listen = COMPATNAME(route_listen_wrapper), 2094 .pr_connect = COMPATNAME(route_connect_wrapper), 2095 .pr_connect2 = COMPATNAME(route_connect2_wrapper), 2096 .pr_disconnect = COMPATNAME(route_disconnect_wrapper), 2097 .pr_shutdown = COMPATNAME(route_shutdown_wrapper), 2098 .pr_abort = COMPATNAME(route_abort_wrapper), 2099 .pr_ioctl = COMPATNAME(route_ioctl_wrapper), 2100 .pr_stat = COMPATNAME(route_stat_wrapper), 2101 .pr_peeraddr = COMPATNAME(route_peeraddr_wrapper), 2102 .pr_sockaddr = COMPATNAME(route_sockaddr_wrapper), 2103 .pr_rcvd = COMPATNAME(route_rcvd_wrapper), 2104 .pr_recvoob = COMPATNAME(route_recvoob_wrapper), 2105 .pr_send = COMPATNAME(route_send_wrapper), 2106 .pr_sendoob = COMPATNAME(route_sendoob_wrapper), 2107 .pr_purgeif = COMPATNAME(route_purgeif_wrapper), 2108 }; 2109 2110 static const struct protosw COMPATNAME(route_protosw)[] = { 2111 { 2112 .pr_type = SOCK_RAW, 2113 .pr_domain = &COMPATNAME(routedomain), 2114 .pr_flags = PR_ATOMIC|PR_ADDR, 2115 .pr_input = raw_input, 2116 .pr_ctlinput = raw_ctlinput, 2117 .pr_ctloutput = route_ctloutput, 2118 .pr_usrreqs = &route_usrreqs, 2119 .pr_init = raw_init, 2120 }, 2121 }; 2122 2123 struct domain COMPATNAME(routedomain) = { 2124 .dom_family = PF_XROUTE, 2125 .dom_name = DOMAINNAME, 2126 .dom_init = COMPATNAME(route_init), 2127 .dom_protosw = COMPATNAME(route_protosw), 2128 .dom_protoswNPROTOSW = 2129 &COMPATNAME(route_protosw)[__arraycount(COMPATNAME(route_protosw))], 2130 }; 2131 2132 static void 2133 sysctl_net_route_setup(struct sysctllog **clog) 2134 { 2135 const struct sysctlnode *rnode = NULL; 2136 2137 sysctl_createv(clog, 0, NULL, &rnode, 2138 CTLFLAG_PERMANENT, 2139 CTLTYPE_NODE, DOMAINNAME, 2140 SYSCTL_DESCR("PF_ROUTE information"), 2141 NULL, 0, NULL, 0, 2142 CTL_NET, PF_XROUTE, CTL_EOL); 2143 2144 sysctl_createv(clog, 0, NULL, NULL, 2145 CTLFLAG_PERMANENT, 2146 CTLTYPE_NODE, "rtable", 2147 SYSCTL_DESCR("Routing table information"), 2148 sysctl_rtable, 0, NULL, 0, 2149 CTL_NET, PF_XROUTE, 0 /* any protocol */, CTL_EOL); 2150 2151 sysctl_createv(clog, 0, &rnode, NULL, 2152 CTLFLAG_PERMANENT, 2153 CTLTYPE_STRUCT, "stats", 2154 SYSCTL_DESCR("Routing statistics"), 2155 NULL, 0, &rtstat, sizeof(rtstat), 2156 CTL_CREATE, CTL_EOL); 2157 } 2158
Indexes created Fri Oct 03 02:09:57 GMT 2025