rtsock.c revision 1.191.2.4
1 /* $NetBSD: rtsock.c,v 1.191.2.4 2017/01/07 08:56:50 pgoyette 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 1.191.2.4 2017/01/07 08:56:50 pgoyette 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 #endif 72 73 #include <sys/param.h> 74 #include <sys/systm.h> 75 #include <sys/proc.h> 76 #include <sys/socket.h> 77 #include <sys/socketvar.h> 78 #include <sys/domain.h> 79 #include <sys/protosw.h> 80 #include <sys/sysctl.h> 81 #include <sys/kauth.h> 82 #include <sys/kmem.h> 83 #include <sys/intr.h> 84 85 #include <net/if.h> 86 #include <net/if_llatbl.h> 87 #include <net/if_types.h> 88 #include <net/route.h> 89 #include <net/raw_cb.h> 90 91 #include <netinet/in_var.h> 92 #include <netinet/if_inarp.h> 93 94 #include <netmpls/mpls.h> 95 96 #ifdef SCTP 97 extern void sctp_add_ip_address(struct ifaddr *); 98 extern void sctp_delete_ip_address(struct ifaddr *); 99 #endif 100 101 #if defined(COMPAT_14) || defined(COMPAT_50) || defined(COMPAT_70) 102 #include <compat/net/if.h> 103 #include <compat/net/route.h> 104 #endif 105 #ifdef COMPAT_RTSOCK 106 #define RTM_XVERSION RTM_OVERSION 107 #define RTM_XNEWADDR RTM_ONEWADDR 108 #define RTM_XDELADDR RTM_ODELADDR 109 #define RTM_XCHGADDR RTM_OCHGADDR 110 #define RT_XADVANCE(a,b) RT_OADVANCE(a,b) 111 #define RT_XROUNDUP(n) RT_OROUNDUP(n) 112 #define PF_XROUTE PF_OROUTE 113 #define rt_xmsghdr rt_msghdr50 114 #define if_xmsghdr if_msghdr /* if_msghdr50 is for RTM_OIFINFO */ 115 #define ifa_xmsghdr ifa_msghdr50 116 #define if_xannouncemsghdr if_announcemsghdr50 117 #define COMPATNAME(x) compat_50_ ## x 118 #define DOMAINNAME "oroute" 119 CTASSERT(sizeof(struct ifa_xmsghdr) == 20); 120 DOMAIN_DEFINE(compat_50_routedomain); /* forward declare and add to link set */ 121 #undef COMPAT_70 122 #else /* COMPAT_RTSOCK */ 123 #define RTM_XVERSION RTM_VERSION 124 #define RTM_XNEWADDR RTM_NEWADDR 125 #define RTM_XDELADDR RTM_DELADDR 126 #define RTM_XCHGADDR RTM_CHGADDR 127 #define RT_XADVANCE(a,b) RT_ADVANCE(a,b) 128 #define RT_XROUNDUP(n) RT_ROUNDUP(n) 129 #define PF_XROUTE PF_ROUTE 130 #define rt_xmsghdr rt_msghdr 131 #define if_xmsghdr if_msghdr 132 #define ifa_xmsghdr ifa_msghdr 133 #define if_xannouncemsghdr if_announcemsghdr 134 #define COMPATNAME(x) x 135 #define DOMAINNAME "route" 136 CTASSERT(sizeof(struct ifa_xmsghdr) == 32); 137 #ifdef COMPAT_50 138 #define COMPATCALL(name, args) compat_50_ ## name args 139 #endif 140 DOMAIN_DEFINE(routedomain); /* forward declare and add to link set */ 141 #undef COMPAT_50 142 #undef COMPAT_14 143 #endif /* COMPAT_RTSOCK */ 144 145 #ifndef COMPATCALL 146 #define COMPATCALL(name, args) do { } while (/*CONSTCOND*/ 0) 147 #endif 148 149 #ifdef RTSOCK_DEBUG 150 #define RT_IN_PRINT(info, b, a) (in_print((b), sizeof(b), \ 151 &((const struct sockaddr_in *)(info)->rti_info[(a)])->sin_addr), (b)) 152 #endif /* RTSOCK_DEBUG */ 153 154 struct route_info COMPATNAME(route_info) = { 155 .ri_dst = { .sa_len = 2, .sa_family = PF_XROUTE, }, 156 .ri_src = { .sa_len = 2, .sa_family = PF_XROUTE, }, 157 .ri_maxqlen = IFQ_MAXLEN, 158 }; 159 160 #define PRESERVED_RTF (RTF_UP | RTF_GATEWAY | RTF_HOST | RTF_DONE | RTF_MASK) 161 162 static void COMPATNAME(route_init)(void); 163 static int COMPATNAME(route_output)(struct mbuf *, struct socket *); 164 165 static int rt_xaddrs(u_char, const char *, const char *, struct rt_addrinfo *); 166 static struct mbuf *rt_makeifannouncemsg(struct ifnet *, int, int, 167 struct rt_addrinfo *); 168 static int rt_msg2(int, struct rt_addrinfo *, void *, struct rt_walkarg *, int *); 169 static void rt_setmetrics(int, const struct rt_xmsghdr *, struct rtentry *); 170 static void rtm_setmetrics(const struct rtentry *, struct rt_xmsghdr *); 171 static void sysctl_net_route_setup(struct sysctllog **); 172 static int sysctl_dumpentry(struct rtentry *, void *); 173 static int sysctl_iflist(int, struct rt_walkarg *, int); 174 static int sysctl_rtable(SYSCTLFN_PROTO); 175 static void rt_adjustcount(int, int); 176 177 static const struct protosw COMPATNAME(route_protosw)[]; 178 179 static void 180 rt_adjustcount(int af, int cnt) 181 { 182 struct route_cb * const cb = &COMPATNAME(route_info).ri_cb; 183 184 cb->any_count += cnt; 185 186 switch (af) { 187 case AF_INET: 188 cb->ip_count += cnt; 189 return; 190 #ifdef INET6 191 case AF_INET6: 192 cb->ip6_count += cnt; 193 return; 194 #endif 195 case AF_MPLS: 196 cb->mpls_count += cnt; 197 return; 198 } 199 } 200 201 static int 202 COMPATNAME(route_attach)(struct socket *so, int proto) 203 { 204 struct rawcb *rp; 205 int s, error; 206 207 KASSERT(sotorawcb(so) == NULL); 208 rp = kmem_zalloc(sizeof(*rp), KM_SLEEP); 209 rp->rcb_len = sizeof(*rp); 210 so->so_pcb = rp; 211 212 s = splsoftnet(); 213 if ((error = raw_attach(so, proto)) == 0) { 214 rt_adjustcount(rp->rcb_proto.sp_protocol, 1); 215 rp->rcb_laddr = &COMPATNAME(route_info).ri_src; 216 rp->rcb_faddr = &COMPATNAME(route_info).ri_dst; 217 } 218 splx(s); 219 220 if (error) { 221 kmem_free(rp, sizeof(*rp)); 222 so->so_pcb = NULL; 223 return error; 224 } 225 226 soisconnected(so); 227 so->so_options |= SO_USELOOPBACK; 228 KASSERT(solocked(so)); 229 230 return error; 231 } 232 233 static void 234 COMPATNAME(route_detach)(struct socket *so) 235 { 236 struct rawcb *rp = sotorawcb(so); 237 int s; 238 239 KASSERT(rp != NULL); 240 KASSERT(solocked(so)); 241 242 s = splsoftnet(); 243 rt_adjustcount(rp->rcb_proto.sp_protocol, -1); 244 raw_detach(so); 245 splx(s); 246 } 247 248 static int 249 COMPATNAME(route_accept)(struct socket *so, struct sockaddr *nam) 250 { 251 KASSERT(solocked(so)); 252 253 panic("route_accept"); 254 255 return EOPNOTSUPP; 256 } 257 258 static int 259 COMPATNAME(route_bind)(struct socket *so, struct sockaddr *nam, struct lwp *l) 260 { 261 KASSERT(solocked(so)); 262 263 return EOPNOTSUPP; 264 } 265 266 static int 267 COMPATNAME(route_listen)(struct socket *so, struct lwp *l) 268 { 269 KASSERT(solocked(so)); 270 271 return EOPNOTSUPP; 272 } 273 274 static int 275 COMPATNAME(route_connect)(struct socket *so, struct sockaddr *nam, struct lwp *l) 276 { 277 KASSERT(solocked(so)); 278 279 return EOPNOTSUPP; 280 } 281 282 static int 283 COMPATNAME(route_connect2)(struct socket *so, struct socket *so2) 284 { 285 KASSERT(solocked(so)); 286 287 return EOPNOTSUPP; 288 } 289 290 static int 291 COMPATNAME(route_disconnect)(struct socket *so) 292 { 293 struct rawcb *rp = sotorawcb(so); 294 int s; 295 296 KASSERT(solocked(so)); 297 KASSERT(rp != NULL); 298 299 s = splsoftnet(); 300 soisdisconnected(so); 301 raw_disconnect(rp); 302 splx(s); 303 304 return 0; 305 } 306 307 static int 308 COMPATNAME(route_shutdown)(struct socket *so) 309 { 310 int s; 311 312 KASSERT(solocked(so)); 313 314 /* 315 * Mark the connection as being incapable of further input. 316 */ 317 s = splsoftnet(); 318 socantsendmore(so); 319 splx(s); 320 return 0; 321 } 322 323 static int 324 COMPATNAME(route_abort)(struct socket *so) 325 { 326 KASSERT(solocked(so)); 327 328 panic("route_abort"); 329 330 return EOPNOTSUPP; 331 } 332 333 static int 334 COMPATNAME(route_ioctl)(struct socket *so, u_long cmd, void *nam, 335 struct ifnet * ifp) 336 { 337 return EOPNOTSUPP; 338 } 339 340 static int 341 COMPATNAME(route_stat)(struct socket *so, struct stat *ub) 342 { 343 KASSERT(solocked(so)); 344 345 return 0; 346 } 347 348 static int 349 COMPATNAME(route_peeraddr)(struct socket *so, struct sockaddr *nam) 350 { 351 struct rawcb *rp = sotorawcb(so); 352 353 KASSERT(solocked(so)); 354 KASSERT(rp != NULL); 355 KASSERT(nam != NULL); 356 357 if (rp->rcb_faddr == NULL) 358 return ENOTCONN; 359 360 raw_setpeeraddr(rp, nam); 361 return 0; 362 } 363 364 static int 365 COMPATNAME(route_sockaddr)(struct socket *so, struct sockaddr *nam) 366 { 367 struct rawcb *rp = sotorawcb(so); 368 369 KASSERT(solocked(so)); 370 KASSERT(rp != NULL); 371 KASSERT(nam != NULL); 372 373 if (rp->rcb_faddr == NULL) 374 return ENOTCONN; 375 376 raw_setsockaddr(rp, nam); 377 return 0; 378 } 379 380 static int 381 COMPATNAME(route_rcvd)(struct socket *so, int flags, struct lwp *l) 382 { 383 KASSERT(solocked(so)); 384 385 return EOPNOTSUPP; 386 } 387 388 static int 389 COMPATNAME(route_recvoob)(struct socket *so, struct mbuf *m, int flags) 390 { 391 KASSERT(solocked(so)); 392 393 return EOPNOTSUPP; 394 } 395 396 static int 397 COMPATNAME(route_send)(struct socket *so, struct mbuf *m, 398 struct sockaddr *nam, struct mbuf *control, struct lwp *l) 399 { 400 int error = 0; 401 int s; 402 403 KASSERT(solocked(so)); 404 KASSERT(so->so_proto == &COMPATNAME(route_protosw)[0]); 405 406 s = splsoftnet(); 407 error = raw_send(so, m, nam, control, l, &COMPATNAME(route_output)); 408 splx(s); 409 410 return error; 411 } 412 413 static int 414 COMPATNAME(route_sendoob)(struct socket *so, struct mbuf *m, 415 struct mbuf *control) 416 { 417 KASSERT(solocked(so)); 418 419 m_freem(m); 420 m_freem(control); 421 422 return EOPNOTSUPP; 423 } 424 static int 425 COMPATNAME(route_purgeif)(struct socket *so, struct ifnet *ifp) 426 { 427 428 panic("route_purgeif"); 429 430 return EOPNOTSUPP; 431 } 432 433 #ifdef INET 434 static int 435 route_get_sdl_index(struct rt_addrinfo *info, int *sdl_index) 436 { 437 struct rtentry *nrt; 438 int error; 439 440 error = rtrequest1(RTM_GET, info, &nrt); 441 if (error != 0) 442 return error; 443 /* 444 * nrt->rt_ifp->if_index may not be correct 445 * due to changing to ifplo0. 446 */ 447 *sdl_index = satosdl(nrt->rt_gateway)->sdl_index; 448 rt_unref(nrt); 449 450 return 0; 451 } 452 #endif /* INET */ 453 454 static void 455 route_get_sdl(const struct ifnet *ifp, const struct sockaddr *dst, 456 struct sockaddr_dl *sdl, int *flags) 457 { 458 struct llentry *la; 459 460 KASSERT(ifp != NULL); 461 462 IF_AFDATA_RLOCK(ifp); 463 switch (dst->sa_family) { 464 case AF_INET: 465 la = lla_lookup(LLTABLE(ifp), 0, dst); 466 break; 467 case AF_INET6: 468 la = lla_lookup(LLTABLE6(ifp), 0, dst); 469 break; 470 default: 471 la = NULL; 472 KASSERTMSG(0, "Invalid AF=%d\n", dst->sa_family); 473 break; 474 } 475 IF_AFDATA_RUNLOCK(ifp); 476 477 void *a = (LLE_IS_VALID(la) && (la->la_flags & LLE_VALID) == LLE_VALID) 478 ? &la->ll_addr : NULL; 479 480 a = sockaddr_dl_init(sdl, sizeof(*sdl), ifp->if_index, ifp->if_type, 481 NULL, 0, a, ifp->if_addrlen); 482 KASSERT(a != NULL); 483 484 if (la != NULL) { 485 *flags = la->la_flags; 486 LLE_RUNLOCK(la); 487 } 488 } 489 490 static int 491 route_output_report(struct rtentry *rt, struct rt_addrinfo *info, 492 struct rt_xmsghdr *rtm, struct rt_xmsghdr **new_rtm) 493 { 494 int len; 495 struct ifnet *ifp; 496 497 if ((rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) == 0) 498 ; 499 else if ((ifp = rt->rt_ifp) != NULL) { 500 const struct ifaddr *rtifa; 501 info->rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 502 /* rtifa used to be simply rt->rt_ifa. 503 * If rt->rt_ifa != NULL, then 504 * rt_get_ifa() != NULL. So this 505 * ought to still be safe. --dyoung 506 */ 507 rtifa = rt_get_ifa(rt); 508 info->rti_info[RTAX_IFA] = rtifa->ifa_addr; 509 #ifdef RTSOCK_DEBUG 510 if (info->rti_info[RTAX_IFA]->sa_family == AF_INET) { 511 char ibuf[INET_ADDRSTRLEN]; 512 char abuf[INET_ADDRSTRLEN]; 513 printf("%s: copying out RTAX_IFA %s " 514 "for info->rti_info[RTAX_DST] %s " 515 "ifa_getifa %p ifa_seqno %p\n", 516 __func__, 517 RT_IN_PRINT(info, ibuf, RTAX_IFA), 518 RT_IN_PRINT(info, abuf, RTAX_DST), 519 (void *)rtifa->ifa_getifa, 520 rtifa->ifa_seqno); 521 } 522 #endif /* RTSOCK_DEBUG */ 523 if (ifp->if_flags & IFF_POINTOPOINT) 524 info->rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 525 else 526 info->rti_info[RTAX_BRD] = NULL; 527 rtm->rtm_index = ifp->if_index; 528 } else { 529 info->rti_info[RTAX_IFP] = NULL; 530 info->rti_info[RTAX_IFA] = NULL; 531 } 532 (void)rt_msg2(rtm->rtm_type, info, NULL, NULL, &len); 533 if (len > rtm->rtm_msglen) { 534 struct rt_xmsghdr *old_rtm = rtm; 535 R_Malloc(*new_rtm, struct rt_xmsghdr *, len); 536 if (*new_rtm == NULL) 537 return ENOBUFS; 538 (void)memcpy(*new_rtm, old_rtm, old_rtm->rtm_msglen); 539 rtm = *new_rtm; 540 } 541 (void)rt_msg2(rtm->rtm_type, info, rtm, NULL, 0); 542 rtm->rtm_flags = rt->rt_flags; 543 rtm_setmetrics(rt, rtm); 544 rtm->rtm_addrs = info->rti_addrs; 545 546 return 0; 547 } 548 549 static struct ifaddr * 550 route_output_get_ifa(const struct rt_addrinfo info, const struct rtentry *rt, 551 struct ifnet **ifp, struct psref *psref) 552 { 553 struct ifaddr *ifa = NULL; 554 555 *ifp = NULL; 556 if (info.rti_info[RTAX_IFP] != NULL) { 557 ifa = ifa_ifwithnet_psref(info.rti_info[RTAX_IFP], psref); 558 if (ifa == NULL) 559 goto next; 560 *ifp = ifa->ifa_ifp; 561 if (info.rti_info[RTAX_IFA] == NULL && 562 info.rti_info[RTAX_GATEWAY] == NULL) 563 goto next; 564 if (info.rti_info[RTAX_IFA] == NULL) { 565 /* route change <dst> <gw> -ifp <if> */ 566 ifa = ifaof_ifpforaddr_psref(info.rti_info[RTAX_GATEWAY], 567 *ifp, psref); 568 } else { 569 /* route change <dst> -ifp <if> -ifa <addr> */ 570 ifa = ifa_ifwithaddr_psref(info.rti_info[RTAX_IFA], psref); 571 if (ifa != NULL) 572 goto out; 573 ifa = ifaof_ifpforaddr_psref(info.rti_info[RTAX_IFA], 574 *ifp, psref); 575 } 576 goto out; 577 } 578 next: 579 if (info.rti_info[RTAX_IFA] != NULL) { 580 /* route change <dst> <gw> -ifa <addr> */ 581 ifa = ifa_ifwithaddr_psref(info.rti_info[RTAX_IFA], psref); 582 if (ifa != NULL) 583 goto out; 584 } 585 if (info.rti_info[RTAX_GATEWAY] != NULL) { 586 /* route change <dst> <gw> */ 587 ifa = ifa_ifwithroute_psref(rt->rt_flags, rt_getkey(rt), 588 info.rti_info[RTAX_GATEWAY], psref); 589 } 590 out: 591 if (ifa != NULL && *ifp == NULL) 592 *ifp = ifa->ifa_ifp; 593 return ifa; 594 } 595 596 static int 597 route_output_change(struct rtentry *rt, struct rt_addrinfo *info, 598 struct rt_xmsghdr *rtm) 599 { 600 int error = 0; 601 struct ifnet *ifp, *new_ifp; 602 struct ifaddr *ifa, *new_ifa; 603 struct psref psref_ifa, psref_new_ifa, psref_ifp; 604 605 /* 606 * new gateway could require new ifaddr, ifp; 607 * flags may also be different; ifp may be specified 608 * by ll sockaddr when protocol address is ambiguous 609 */ 610 ifp = rt_getifp(info, &psref_ifp); 611 ifa = rt_getifa(info, &psref_ifa); 612 if (ifa == NULL) { 613 error = ENETUNREACH; 614 goto out; 615 } 616 if (info->rti_info[RTAX_GATEWAY]) { 617 error = rt_setgate(rt, info->rti_info[RTAX_GATEWAY]); 618 if (error != 0) 619 goto out; 620 } 621 if (info->rti_info[RTAX_TAG]) { 622 const struct sockaddr *tag; 623 tag = rt_settag(rt, info->rti_info[RTAX_TAG]); 624 if (tag == NULL) { 625 error = ENOBUFS; 626 goto out; 627 } 628 } 629 /* new gateway could require new ifaddr, ifp; 630 flags may also be different; ifp may be specified 631 by ll sockaddr when protocol address is ambiguous */ 632 new_ifa = route_output_get_ifa(*info, rt, &new_ifp, &psref_new_ifa); 633 if (new_ifa != NULL) { 634 ifa_release(ifa, &psref_ifa); 635 ifa = new_ifa; 636 } 637 if (ifa) { 638 struct ifaddr *oifa = rt->rt_ifa; 639 if (oifa != ifa && 640 !ifa_is_destroying(ifa) && !if_is_deactivated(new_ifp)) { 641 if (oifa && oifa->ifa_rtrequest) 642 oifa->ifa_rtrequest(RTM_DELETE, rt, info); 643 rt_replace_ifa(rt, ifa); 644 rt->rt_ifp = new_ifp; 645 } 646 if (new_ifa == NULL) 647 ifa_release(ifa, &psref_ifa); 648 } 649 ifa_release(new_ifa, &psref_new_ifa); 650 if (new_ifp && rt->rt_ifp != new_ifp 651 && !if_is_deactivated(new_ifp)) 652 rt->rt_ifp = new_ifp; 653 rt_setmetrics(rtm->rtm_inits, rtm, rt); 654 if (rt->rt_flags != info->rti_flags) 655 rt->rt_flags = (info->rti_flags & ~PRESERVED_RTF) 656 | (rt->rt_flags & PRESERVED_RTF); 657 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 658 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, info); 659 out: 660 if_put(ifp, &psref_ifp); 661 662 return error; 663 } 664 665 /*ARGSUSED*/ 666 int 667 COMPATNAME(route_output)(struct mbuf *m, struct socket *so) 668 { 669 struct sockproto proto = { .sp_family = PF_XROUTE, }; 670 struct rt_xmsghdr *rtm = NULL; 671 struct rt_xmsghdr *old_rtm = NULL, *new_rtm = NULL; 672 struct rtentry *rt = NULL; 673 struct rtentry *saved_nrt = NULL; 674 struct rt_addrinfo info; 675 int len, error = 0; 676 sa_family_t family; 677 struct sockaddr_dl sdl; 678 int bound = curlwp_bind(); 679 bool do_rt_free = false; 680 681 #define senderr(e) do { error = e; goto flush;} while (/*CONSTCOND*/ 0) 682 if (m == NULL || ((m->m_len < sizeof(int32_t)) && 683 (m = m_pullup(m, sizeof(int32_t))) == NULL)) { 684 error = ENOBUFS; 685 goto out; 686 } 687 if ((m->m_flags & M_PKTHDR) == 0) 688 panic("%s", __func__); 689 len = m->m_pkthdr.len; 690 if (len < sizeof(*rtm) || 691 len != mtod(m, struct rt_xmsghdr *)->rtm_msglen) { 692 info.rti_info[RTAX_DST] = NULL; 693 senderr(EINVAL); 694 } 695 R_Malloc(rtm, struct rt_xmsghdr *, len); 696 if (rtm == NULL) { 697 info.rti_info[RTAX_DST] = NULL; 698 senderr(ENOBUFS); 699 } 700 m_copydata(m, 0, len, rtm); 701 if (rtm->rtm_version != RTM_XVERSION) { 702 info.rti_info[RTAX_DST] = NULL; 703 senderr(EPROTONOSUPPORT); 704 } 705 rtm->rtm_pid = curproc->p_pid; 706 memset(&info, 0, sizeof(info)); 707 info.rti_addrs = rtm->rtm_addrs; 708 if (rt_xaddrs(rtm->rtm_type, (const char *)(rtm + 1), len + (char *)rtm, 709 &info)) { 710 senderr(EINVAL); 711 } 712 info.rti_flags = rtm->rtm_flags; 713 #ifdef RTSOCK_DEBUG 714 if (info.rti_info[RTAX_DST]->sa_family == AF_INET) { 715 char abuf[INET_ADDRSTRLEN]; 716 printf("%s: extracted info.rti_info[RTAX_DST] %s\n", __func__, 717 RT_IN_PRINT(&info, abuf, RTAX_DST)); 718 } 719 #endif /* RTSOCK_DEBUG */ 720 if (info.rti_info[RTAX_DST] == NULL || 721 (info.rti_info[RTAX_DST]->sa_family >= AF_MAX)) { 722 senderr(EINVAL); 723 } 724 if (info.rti_info[RTAX_GATEWAY] != NULL && 725 (info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) { 726 senderr(EINVAL); 727 } 728 729 /* 730 * Verify that the caller has the appropriate privilege; RTM_GET 731 * is the only operation the non-superuser is allowed. 732 */ 733 if (kauth_authorize_network(curlwp->l_cred, KAUTH_NETWORK_ROUTE, 734 0, rtm, NULL, NULL) != 0) 735 senderr(EACCES); 736 737 switch (rtm->rtm_type) { 738 739 case RTM_ADD: 740 if (info.rti_info[RTAX_GATEWAY] == NULL) { 741 senderr(EINVAL); 742 } 743 #ifdef INET 744 /* support for new ARP code with keeping backcompat */ 745 if (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) { 746 const struct sockaddr_dl *sdlp = 747 satocsdl(info.rti_info[RTAX_GATEWAY]); 748 749 /* Allow routing requests by interface index */ 750 if (sdlp->sdl_nlen == 0 && sdlp->sdl_alen == 0 751 && sdlp->sdl_slen == 0) 752 goto fallback; 753 /* 754 * Old arp binaries don't set the sdl_index 755 * so we have to complement it. 756 */ 757 int sdl_index = sdlp->sdl_index; 758 if (sdl_index == 0) { 759 error = route_get_sdl_index(&info, &sdl_index); 760 if (error != 0) 761 goto fallback; 762 } else if ( 763 info.rti_info[RTAX_DST]->sa_family == AF_INET) { 764 /* 765 * XXX workaround for SIN_PROXY case; proxy arp 766 * entry should be in an interface that has 767 * a network route including the destination, 768 * not a local (link) route that may not be a 769 * desired place, for example a tap. 770 */ 771 const struct sockaddr_inarp *sina = 772 (const struct sockaddr_inarp *) 773 info.rti_info[RTAX_DST]; 774 if (sina->sin_other & SIN_PROXY) { 775 error = route_get_sdl_index(&info, 776 &sdl_index); 777 if (error != 0) 778 goto fallback; 779 } 780 } 781 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 782 rtm->rtm_rmx.rmx_expire, &info, sdl_index); 783 break; 784 } 785 fallback: 786 #endif /* INET */ 787 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 788 if (error == 0) { 789 rt_setmetrics(rtm->rtm_inits, rtm, saved_nrt); 790 rt_unref(saved_nrt); 791 } 792 break; 793 794 case RTM_DELETE: 795 #ifdef INET 796 /* support for new ARP code */ 797 if (info.rti_info[RTAX_GATEWAY] && 798 (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) && 799 (rtm->rtm_flags & RTF_LLDATA) != 0) { 800 error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, 801 rtm->rtm_rmx.rmx_expire, &info, 0); 802 break; 803 } 804 #endif /* INET */ 805 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 806 if (error != 0) 807 break; 808 809 rt = saved_nrt; 810 do_rt_free = true; 811 info.rti_info[RTAX_DST] = rt_getkey(rt); 812 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 813 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 814 info.rti_info[RTAX_TAG] = rt_gettag(rt); 815 error = route_output_report(rt, &info, rtm, &new_rtm); 816 if (error) 817 senderr(error); 818 if (new_rtm != NULL) { 819 old_rtm = rtm; 820 rtm = new_rtm; 821 } 822 break; 823 824 case RTM_GET: 825 case RTM_CHANGE: 826 case RTM_LOCK: 827 /* XXX This will mask info.rti_info[RTAX_DST] with 828 * info.rti_info[RTAX_NETMASK] before 829 * searching. It did not used to do that. --dyoung 830 */ 831 rt = NULL; 832 error = rtrequest1(RTM_GET, &info, &rt); 833 if (error != 0) 834 senderr(error); 835 if (rtm->rtm_type != RTM_GET) {/* XXX: too grotty */ 836 if (memcmp(info.rti_info[RTAX_DST], rt_getkey(rt), 837 info.rti_info[RTAX_DST]->sa_len) != 0) 838 senderr(ESRCH); 839 if (info.rti_info[RTAX_NETMASK] == NULL && 840 rt_mask(rt) != NULL) 841 senderr(ETOOMANYREFS); 842 } 843 844 /* 845 * XXX if arp/ndp requests an L2 entry, we have to obtain 846 * it from lltable while for the route command we have to 847 * return a route as it is. How to distinguish them? 848 * For newer arp/ndp, RTF_LLDATA flag set by arp/ndp 849 * indicates an L2 entry is requested. For old arp/ndp 850 * binaries, we check RTF_UP flag is NOT set; it works 851 * by the fact that arp/ndp don't set it while the route 852 * command sets it. 853 */ 854 if (((rtm->rtm_flags & RTF_LLDATA) != 0 || 855 (rtm->rtm_flags & RTF_UP) == 0) && 856 rtm->rtm_type == RTM_GET && 857 sockaddr_cmp(rt_getkey(rt), info.rti_info[RTAX_DST]) != 0) { 858 int ll_flags = 0; 859 route_get_sdl(rt->rt_ifp, info.rti_info[RTAX_DST], &sdl, 860 &ll_flags); 861 info.rti_info[RTAX_GATEWAY] = sstocsa(&sdl); 862 error = route_output_report(rt, &info, rtm, &new_rtm); 863 if (error) 864 senderr(error); 865 if (new_rtm != NULL) { 866 old_rtm = rtm; 867 rtm = new_rtm; 868 } 869 rtm->rtm_flags |= RTF_LLDATA; 870 rtm->rtm_flags |= (ll_flags & LLE_STATIC) ? RTF_STATIC : 0; 871 break; 872 } 873 874 switch (rtm->rtm_type) { 875 case RTM_GET: 876 info.rti_info[RTAX_DST] = rt_getkey(rt); 877 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 878 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 879 info.rti_info[RTAX_TAG] = rt_gettag(rt); 880 error = route_output_report(rt, &info, rtm, &new_rtm); 881 if (error) 882 senderr(error); 883 if (new_rtm != NULL) { 884 old_rtm = rtm; 885 rtm = new_rtm; 886 } 887 break; 888 889 case RTM_CHANGE: 890 error = rt_update_prepare(rt); 891 if (error == 0) { 892 error = route_output_change(rt, &info, rtm); 893 rt_update_finish(rt); 894 } 895 if (error != 0) 896 goto flush; 897 /*FALLTHROUGH*/ 898 case RTM_LOCK: 899 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 900 rt->rt_rmx.rmx_locks |= 901 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 902 break; 903 } 904 break; 905 906 default: 907 senderr(EOPNOTSUPP); 908 } 909 910 flush: 911 if (rtm) { 912 if (error) 913 rtm->rtm_errno = error; 914 else 915 rtm->rtm_flags |= RTF_DONE; 916 } 917 family = info.rti_info[RTAX_DST] ? info.rti_info[RTAX_DST]->sa_family : 918 0; 919 /* We cannot free old_rtm until we have stopped using the 920 * pointers in info, some of which may point to sockaddrs 921 * in old_rtm. 922 */ 923 if (old_rtm != NULL) 924 Free(old_rtm); 925 if (rt) { 926 if (do_rt_free) 927 rt_free(rt); 928 else 929 rt_unref(rt); 930 } 931 { 932 struct rawcb *rp = NULL; 933 /* 934 * Check to see if we don't want our own messages. 935 */ 936 if ((so->so_options & SO_USELOOPBACK) == 0) { 937 if (COMPATNAME(route_info).ri_cb.any_count <= 1) { 938 if (rtm) 939 Free(rtm); 940 m_freem(m); 941 goto out; 942 } 943 /* There is another listener, so construct message */ 944 rp = sotorawcb(so); 945 } 946 if (rtm) { 947 m_copyback(m, 0, rtm->rtm_msglen, rtm); 948 if (m->m_pkthdr.len < rtm->rtm_msglen) { 949 m_freem(m); 950 m = NULL; 951 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 952 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 953 Free(rtm); 954 } 955 if (rp) 956 rp->rcb_proto.sp_family = 0; /* Avoid us */ 957 if (family) 958 proto.sp_protocol = family; 959 if (m) 960 raw_input(m, &proto, &COMPATNAME(route_info).ri_src, 961 &COMPATNAME(route_info).ri_dst); 962 if (rp) 963 rp->rcb_proto.sp_family = PF_XROUTE; 964 } 965 out: 966 curlwp_bindx(bound); 967 return error; 968 } 969 970 static void 971 rt_setmetrics(int which, const struct rt_xmsghdr *in, struct rtentry *out) 972 { 973 #define metric(f, e) if (which & (f)) out->rt_rmx.e = in->rtm_rmx.e; 974 metric(RTV_RPIPE, rmx_recvpipe); 975 metric(RTV_SPIPE, rmx_sendpipe); 976 metric(RTV_SSTHRESH, rmx_ssthresh); 977 metric(RTV_RTT, rmx_rtt); 978 metric(RTV_RTTVAR, rmx_rttvar); 979 metric(RTV_HOPCOUNT, rmx_hopcount); 980 metric(RTV_MTU, rmx_mtu); 981 #undef metric 982 if (which & RTV_EXPIRE) { 983 out->rt_rmx.rmx_expire = in->rtm_rmx.rmx_expire ? 984 time_wall_to_mono(in->rtm_rmx.rmx_expire) : 0; 985 } 986 } 987 988 static void 989 rtm_setmetrics(const struct rtentry *in, struct rt_xmsghdr *out) 990 { 991 #define metric(e) out->rtm_rmx.e = in->rt_rmx.e; 992 metric(rmx_recvpipe); 993 metric(rmx_sendpipe); 994 metric(rmx_ssthresh); 995 metric(rmx_rtt); 996 metric(rmx_rttvar); 997 metric(rmx_hopcount); 998 metric(rmx_mtu); 999 #undef metric 1000 out->rtm_rmx.rmx_expire = in->rt_rmx.rmx_expire ? 1001 time_mono_to_wall(in->rt_rmx.rmx_expire) : 0; 1002 } 1003 1004 static int 1005 rt_xaddrs(u_char rtmtype, const char *cp, const char *cplim, 1006 struct rt_addrinfo *rtinfo) 1007 { 1008 const struct sockaddr *sa = NULL; /* Quell compiler warning */ 1009 int i; 1010 1011 for (i = 0; i < RTAX_MAX && cp < cplim; i++) { 1012 if ((rtinfo->rti_addrs & (1 << i)) == 0) 1013 continue; 1014 rtinfo->rti_info[i] = sa = (const struct sockaddr *)cp; 1015 RT_XADVANCE(cp, sa); 1016 } 1017 1018 /* 1019 * Check for extra addresses specified, except RTM_GET asking 1020 * for interface info. 1021 */ 1022 if (rtmtype == RTM_GET) { 1023 if (((rtinfo->rti_addrs & 1024 (~((1 << RTAX_IFP) | (1 << RTAX_IFA)))) & (~0U << i)) != 0) 1025 return 1; 1026 } else if ((rtinfo->rti_addrs & (~0U << i)) != 0) 1027 return 1; 1028 /* Check for bad data length. */ 1029 if (cp != cplim) { 1030 if (i == RTAX_NETMASK + 1 && sa != NULL && 1031 cp - RT_XROUNDUP(sa->sa_len) + sa->sa_len == cplim) 1032 /* 1033 * The last sockaddr was info.rti_info[RTAX_NETMASK]. 1034 * We accept this for now for the sake of old 1035 * binaries or third party softwares. 1036 */ 1037 ; 1038 else 1039 return 1; 1040 } 1041 return 0; 1042 } 1043 1044 static int 1045 rt_getlen(int type) 1046 { 1047 #ifndef COMPAT_RTSOCK 1048 CTASSERT(__alignof(struct ifa_msghdr) >= sizeof(uint64_t)); 1049 CTASSERT(__alignof(struct if_msghdr) >= sizeof(uint64_t)); 1050 CTASSERT(__alignof(struct if_announcemsghdr) >= sizeof(uint64_t)); 1051 CTASSERT(__alignof(struct rt_msghdr) >= sizeof(uint64_t)); 1052 #endif 1053 1054 switch (type) { 1055 case RTM_ODELADDR: 1056 case RTM_ONEWADDR: 1057 case RTM_OCHGADDR: 1058 #ifdef COMPAT_70 1059 return sizeof(struct ifa_msghdr70); 1060 #else 1061 #ifdef DIAGNOSTIC 1062 printf("RTM_ONEWADDR\n"); 1063 #endif 1064 return -1; 1065 #endif 1066 case RTM_DELADDR: 1067 case RTM_NEWADDR: 1068 case RTM_CHGADDR: 1069 return sizeof(struct ifa_xmsghdr); 1070 1071 case RTM_OOIFINFO: 1072 #ifdef COMPAT_14 1073 return sizeof(struct if_msghdr14); 1074 #else 1075 #ifdef DIAGNOSTIC 1076 printf("RTM_OOIFINFO\n"); 1077 #endif 1078 return -1; 1079 #endif 1080 case RTM_OIFINFO: 1081 #ifdef COMPAT_50 1082 return sizeof(struct if_msghdr50); 1083 #else 1084 #ifdef DIAGNOSTIC 1085 printf("RTM_OIFINFO\n"); 1086 #endif 1087 return -1; 1088 #endif 1089 1090 case RTM_IFINFO: 1091 return sizeof(struct if_xmsghdr); 1092 1093 case RTM_IFANNOUNCE: 1094 case RTM_IEEE80211: 1095 return sizeof(struct if_xannouncemsghdr); 1096 1097 default: 1098 return sizeof(struct rt_xmsghdr); 1099 } 1100 } 1101 1102 1103 struct mbuf * 1104 COMPATNAME(rt_msg1)(int type, struct rt_addrinfo *rtinfo, void *data, int datalen) 1105 { 1106 struct rt_xmsghdr *rtm; 1107 struct mbuf *m; 1108 int i; 1109 const struct sockaddr *sa; 1110 int len, dlen; 1111 1112 m = m_gethdr(M_DONTWAIT, MT_DATA); 1113 if (m == NULL) 1114 return m; 1115 MCLAIM(m, &COMPATNAME(routedomain).dom_mowner); 1116 1117 if ((len = rt_getlen(type)) == -1) 1118 goto out; 1119 if (len > MHLEN + MLEN) 1120 panic("%s: message too long", __func__); 1121 else if (len > MHLEN) { 1122 m->m_next = m_get(M_DONTWAIT, MT_DATA); 1123 if (m->m_next == NULL) 1124 goto out; 1125 MCLAIM(m->m_next, m->m_owner); 1126 m->m_pkthdr.len = len; 1127 m->m_len = MHLEN; 1128 m->m_next->m_len = len - MHLEN; 1129 } else { 1130 m->m_pkthdr.len = m->m_len = len; 1131 } 1132 m_reset_rcvif(m); 1133 m_copyback(m, 0, datalen, data); 1134 if (len > datalen) 1135 (void)memset(mtod(m, char *) + datalen, 0, len - datalen); 1136 rtm = mtod(m, struct rt_xmsghdr *); 1137 for (i = 0; i < RTAX_MAX; i++) { 1138 if ((sa = rtinfo->rti_info[i]) == NULL) 1139 continue; 1140 rtinfo->rti_addrs |= (1 << i); 1141 dlen = RT_XROUNDUP(sa->sa_len); 1142 m_copyback(m, len, sa->sa_len, sa); 1143 if (dlen != sa->sa_len) { 1144 /* 1145 * Up to 6 + 1 nul's since roundup is to 1146 * sizeof(uint64_t) (8 bytes) 1147 */ 1148 m_copyback(m, len + sa->sa_len, 1149 dlen - sa->sa_len, "\0\0\0\0\0\0"); 1150 } 1151 len += dlen; 1152 } 1153 if (m->m_pkthdr.len != len) 1154 goto out; 1155 rtm->rtm_msglen = len; 1156 rtm->rtm_version = RTM_XVERSION; 1157 rtm->rtm_type = type; 1158 return m; 1159 out: 1160 m_freem(m); 1161 return NULL; 1162 } 1163 1164 /* 1165 * rt_msg2 1166 * 1167 * fills 'cp' or 'w'.w_tmem with the routing socket message and 1168 * returns the length of the message in 'lenp'. 1169 * 1170 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 1171 * the message 1172 * otherwise walkarg's w_needed is updated and if the user buffer is 1173 * specified and w_needed indicates space exists the information is copied 1174 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 1175 * if the allocation fails ENOBUFS is returned. 1176 */ 1177 static int 1178 rt_msg2(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 1179 int *lenp) 1180 { 1181 int i; 1182 int len, dlen, second_time = 0; 1183 char *cp0, *cp = cpv; 1184 1185 rtinfo->rti_addrs = 0; 1186 again: 1187 if ((len = rt_getlen(type)) == -1) 1188 return EINVAL; 1189 1190 if ((cp0 = cp) != NULL) 1191 cp += len; 1192 for (i = 0; i < RTAX_MAX; i++) { 1193 const struct sockaddr *sa; 1194 1195 if ((sa = rtinfo->rti_info[i]) == NULL) 1196 continue; 1197 rtinfo->rti_addrs |= (1 << i); 1198 dlen = RT_XROUNDUP(sa->sa_len); 1199 if (cp) { 1200 int diff = dlen - sa->sa_len; 1201 (void)memcpy(cp, sa, (size_t)sa->sa_len); 1202 cp += sa->sa_len; 1203 if (diff > 0) { 1204 (void)memset(cp, 0, (size_t)diff); 1205 cp += diff; 1206 } 1207 } 1208 len += dlen; 1209 } 1210 if (cp == NULL && w != NULL && !second_time) { 1211 struct rt_walkarg *rw = w; 1212 1213 rw->w_needed += len; 1214 if (rw->w_needed <= 0 && rw->w_where) { 1215 if (rw->w_tmemsize < len) { 1216 if (rw->w_tmem) 1217 free(rw->w_tmem, M_RTABLE); 1218 rw->w_tmem = malloc(len, M_RTABLE, M_NOWAIT); 1219 if (rw->w_tmem) 1220 rw->w_tmemsize = len; 1221 else 1222 rw->w_tmemsize = 0; 1223 } 1224 if (rw->w_tmem) { 1225 cp = rw->w_tmem; 1226 second_time = 1; 1227 goto again; 1228 } else { 1229 rw->w_tmemneeded = len; 1230 return ENOBUFS; 1231 } 1232 } 1233 } 1234 if (cp) { 1235 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)cp0; 1236 1237 rtm->rtm_version = RTM_XVERSION; 1238 rtm->rtm_type = type; 1239 rtm->rtm_msglen = len; 1240 } 1241 if (lenp) 1242 *lenp = len; 1243 return 0; 1244 } 1245 1246 #ifndef COMPAT_RTSOCK 1247 int 1248 rt_msg3(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 1249 int *lenp) 1250 { 1251 return rt_msg2(type, rtinfo, cpv, w, lenp); 1252 } 1253 #endif 1254 1255 /* 1256 * This routine is called to generate a message from the routing 1257 * socket indicating that a redirect has occurred, a routing lookup 1258 * has failed, or that a protocol has detected timeouts to a particular 1259 * destination. 1260 */ 1261 void 1262 COMPATNAME(rt_missmsg)(int type, const struct rt_addrinfo *rtinfo, int flags, 1263 int error) 1264 { 1265 struct rt_xmsghdr rtm; 1266 struct mbuf *m; 1267 const struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 1268 struct rt_addrinfo info = *rtinfo; 1269 1270 COMPATCALL(rt_missmsg, (type, rtinfo, flags, error)); 1271 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1272 return; 1273 memset(&rtm, 0, sizeof(rtm)); 1274 rtm.rtm_pid = curproc->p_pid; 1275 rtm.rtm_flags = RTF_DONE | flags; 1276 rtm.rtm_errno = error; 1277 m = COMPATNAME(rt_msg1)(type, &info, &rtm, sizeof(rtm)); 1278 if (m == NULL) 1279 return; 1280 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1281 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1282 } 1283 1284 /* 1285 * This routine is called to generate a message from the routing 1286 * socket indicating that the status of a network interface has changed. 1287 */ 1288 void 1289 COMPATNAME(rt_ifmsg)(struct ifnet *ifp) 1290 { 1291 struct if_xmsghdr ifm; 1292 struct mbuf *m; 1293 struct rt_addrinfo info; 1294 1295 COMPATCALL(rt_ifmsg, (ifp)); 1296 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1297 return; 1298 (void)memset(&info, 0, sizeof(info)); 1299 (void)memset(&ifm, 0, sizeof(ifm)); 1300 ifm.ifm_index = ifp->if_index; 1301 ifm.ifm_flags = ifp->if_flags; 1302 ifm.ifm_data = ifp->if_data; 1303 ifm.ifm_addrs = 0; 1304 m = COMPATNAME(rt_msg1)(RTM_IFINFO, &info, &ifm, sizeof(ifm)); 1305 if (m == NULL) 1306 return; 1307 COMPATNAME(route_enqueue)(m, 0); 1308 #ifdef COMPAT_14 1309 compat_14_rt_oifmsg(ifp); 1310 #endif 1311 #ifdef COMPAT_50 1312 compat_50_rt_oifmsg(ifp); 1313 #endif 1314 } 1315 1316 #ifndef COMPAT_RTSOCK 1317 static int 1318 if_addrflags(struct ifaddr *ifa) 1319 { 1320 1321 switch (ifa->ifa_addr->sa_family) { 1322 #ifdef INET 1323 case AF_INET: 1324 return ((struct in_ifaddr *)ifa)->ia4_flags; 1325 #endif 1326 #ifdef INET6 1327 case AF_INET6: 1328 return ((struct in6_ifaddr *)ifa)->ia6_flags; 1329 #endif 1330 default: 1331 return 0; 1332 } 1333 } 1334 #endif 1335 1336 /* 1337 * This is called to generate messages from the routing socket 1338 * indicating a network interface has had addresses associated with it. 1339 * if we ever reverse the logic and replace messages TO the routing 1340 * socket indicate a request to configure interfaces, then it will 1341 * be unnecessary as the routing socket will automatically generate 1342 * copies of it. 1343 */ 1344 void 1345 COMPATNAME(rt_newaddrmsg)(int cmd, struct ifaddr *ifa, int error, 1346 struct rtentry *rt) 1347 { 1348 #define cmdpass(__cmd, __pass) (((__cmd) << 2) | (__pass)) 1349 struct rt_addrinfo info; 1350 const struct sockaddr *sa; 1351 int pass; 1352 struct mbuf *m; 1353 struct ifnet *ifp; 1354 struct rt_xmsghdr rtm; 1355 struct ifa_xmsghdr ifam; 1356 int ncmd; 1357 1358 KASSERT(ifa != NULL); 1359 KASSERT(ifa->ifa_addr != NULL); 1360 ifp = ifa->ifa_ifp; 1361 #ifdef SCTP 1362 if (cmd == RTM_ADD) { 1363 sctp_add_ip_address(ifa); 1364 } else if (cmd == RTM_DELETE) { 1365 sctp_delete_ip_address(ifa); 1366 } 1367 #endif 1368 1369 COMPATCALL(rt_newaddrmsg, (cmd, ifa, error, rt)); 1370 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1371 return; 1372 for (pass = 1; pass < 3; pass++) { 1373 memset(&info, 0, sizeof(info)); 1374 switch (cmdpass(cmd, pass)) { 1375 case cmdpass(RTM_ADD, 1): 1376 case cmdpass(RTM_CHANGE, 1): 1377 case cmdpass(RTM_DELETE, 2): 1378 case cmdpass(RTM_NEWADDR, 1): 1379 case cmdpass(RTM_DELADDR, 1): 1380 case cmdpass(RTM_CHGADDR, 1): 1381 switch (cmd) { 1382 case RTM_ADD: 1383 ncmd = RTM_XNEWADDR; 1384 break; 1385 case RTM_DELETE: 1386 ncmd = RTM_XDELADDR; 1387 break; 1388 case RTM_CHANGE: 1389 ncmd = RTM_XCHGADDR; 1390 break; 1391 case RTM_NEWADDR: 1392 ncmd = RTM_XNEWADDR; 1393 break; 1394 case RTM_DELADDR: 1395 ncmd = RTM_XDELADDR; 1396 break; 1397 case RTM_CHGADDR: 1398 ncmd = RTM_XCHGADDR; 1399 break; 1400 default: 1401 panic("%s: unknown command %d", __func__, cmd); 1402 } 1403 #ifdef COMPAT_70 1404 compat_70_rt_newaddrmsg1(ncmd, ifa); 1405 #endif 1406 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; 1407 KASSERT(ifp->if_dl != NULL); 1408 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1409 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1410 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1411 memset(&ifam, 0, sizeof(ifam)); 1412 ifam.ifam_index = ifp->if_index; 1413 ifam.ifam_metric = ifa->ifa_metric; 1414 ifam.ifam_flags = ifa->ifa_flags; 1415 #ifndef COMPAT_RTSOCK 1416 ifam.ifam_pid = curproc->p_pid; 1417 ifam.ifam_addrflags = if_addrflags(ifa); 1418 #endif 1419 m = COMPATNAME(rt_msg1)(ncmd, &info, &ifam, sizeof(ifam)); 1420 if (m == NULL) 1421 continue; 1422 mtod(m, struct ifa_xmsghdr *)->ifam_addrs = 1423 info.rti_addrs; 1424 break; 1425 case cmdpass(RTM_ADD, 2): 1426 case cmdpass(RTM_CHANGE, 2): 1427 case cmdpass(RTM_DELETE, 1): 1428 if (rt == NULL) 1429 continue; 1430 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1431 info.rti_info[RTAX_DST] = sa = rt_getkey(rt); 1432 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1433 memset(&rtm, 0, sizeof(rtm)); 1434 rtm.rtm_pid = curproc->p_pid; 1435 rtm.rtm_index = ifp->if_index; 1436 rtm.rtm_flags |= rt->rt_flags; 1437 rtm.rtm_errno = error; 1438 m = COMPATNAME(rt_msg1)(cmd, &info, &rtm, sizeof(rtm)); 1439 if (m == NULL) 1440 continue; 1441 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 1442 break; 1443 default: 1444 continue; 1445 } 1446 #ifdef DIAGNOSTIC 1447 if (m == NULL) 1448 panic("%s: called with wrong command", __func__); 1449 #endif 1450 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 1451 } 1452 #undef cmdpass 1453 1454 } 1455 1456 static struct mbuf * 1457 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 1458 struct rt_addrinfo *info) 1459 { 1460 struct if_xannouncemsghdr ifan; 1461 1462 memset(info, 0, sizeof(*info)); 1463 memset(&ifan, 0, sizeof(ifan)); 1464 ifan.ifan_index = ifp->if_index; 1465 strlcpy(ifan.ifan_name, ifp->if_xname, sizeof(ifan.ifan_name)); 1466 ifan.ifan_what = what; 1467 return COMPATNAME(rt_msg1)(type, info, &ifan, sizeof(ifan)); 1468 } 1469 1470 /* 1471 * This is called to generate routing socket messages indicating 1472 * network interface arrival and departure. 1473 */ 1474 void 1475 COMPATNAME(rt_ifannouncemsg)(struct ifnet *ifp, int what) 1476 { 1477 struct mbuf *m; 1478 struct rt_addrinfo info; 1479 1480 COMPATCALL(rt_ifannouncemsg, (ifp, what)); 1481 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1482 return; 1483 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); 1484 if (m == NULL) 1485 return; 1486 COMPATNAME(route_enqueue)(m, 0); 1487 } 1488 1489 /* 1490 * This is called to generate routing socket messages indicating 1491 * IEEE80211 wireless events. 1492 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 1493 */ 1494 void 1495 COMPATNAME(rt_ieee80211msg)(struct ifnet *ifp, int what, void *data, 1496 size_t data_len) 1497 { 1498 struct mbuf *m; 1499 struct rt_addrinfo info; 1500 1501 COMPATCALL(rt_ieee80211msg, (ifp, what, data, data_len)); 1502 if (COMPATNAME(route_info).ri_cb.any_count == 0) 1503 return; 1504 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 1505 if (m == NULL) 1506 return; 1507 /* 1508 * Append the ieee80211 data. Try to stick it in the 1509 * mbuf containing the ifannounce msg; otherwise allocate 1510 * a new mbuf and append. 1511 * 1512 * NB: we assume m is a single mbuf. 1513 */ 1514 if (data_len > M_TRAILINGSPACE(m)) { 1515 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 1516 if (n == NULL) { 1517 m_freem(m); 1518 return; 1519 } 1520 (void)memcpy(mtod(n, void *), data, data_len); 1521 n->m_len = data_len; 1522 m->m_next = n; 1523 } else if (data_len > 0) { 1524 (void)memcpy(mtod(m, uint8_t *) + m->m_len, data, data_len); 1525 m->m_len += data_len; 1526 } 1527 if (m->m_flags & M_PKTHDR) 1528 m->m_pkthdr.len += data_len; 1529 mtod(m, struct if_xannouncemsghdr *)->ifan_msglen += data_len; 1530 COMPATNAME(route_enqueue)(m, 0); 1531 } 1532 1533 /* 1534 * This is used in dumping the kernel table via sysctl(). 1535 */ 1536 static int 1537 sysctl_dumpentry(struct rtentry *rt, void *v) 1538 { 1539 struct rt_walkarg *w = v; 1540 int error = 0, size; 1541 struct rt_addrinfo info; 1542 1543 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1544 return 0; 1545 memset(&info, 0, sizeof(info)); 1546 info.rti_info[RTAX_DST] = rt_getkey(rt); 1547 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1548 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1549 info.rti_info[RTAX_TAG] = rt_gettag(rt); 1550 if (rt->rt_ifp) { 1551 const struct ifaddr *rtifa; 1552 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_dl->ifa_addr; 1553 /* rtifa used to be simply rt->rt_ifa. If rt->rt_ifa != NULL, 1554 * then rt_get_ifa() != NULL. So this ought to still be safe. 1555 * --dyoung 1556 */ 1557 rtifa = rt_get_ifa(rt); 1558 info.rti_info[RTAX_IFA] = rtifa->ifa_addr; 1559 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1560 info.rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 1561 } 1562 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 1563 return error; 1564 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1565 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)w->w_tmem; 1566 1567 rtm->rtm_flags = rt->rt_flags; 1568 rtm->rtm_use = rt->rt_use; 1569 rtm_setmetrics(rt, rtm); 1570 KASSERT(rt->rt_ifp != NULL); 1571 rtm->rtm_index = rt->rt_ifp->if_index; 1572 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1573 rtm->rtm_addrs = info.rti_addrs; 1574 if ((error = copyout(rtm, w->w_where, size)) != 0) 1575 w->w_where = NULL; 1576 else 1577 w->w_where = (char *)w->w_where + size; 1578 } 1579 return error; 1580 } 1581 1582 static int 1583 sysctl_iflist_if(struct ifnet *ifp, struct rt_walkarg *w, 1584 struct rt_addrinfo *info, size_t len) 1585 { 1586 struct if_xmsghdr *ifm; 1587 int error; 1588 1589 ifm = (struct if_xmsghdr *)w->w_tmem; 1590 ifm->ifm_index = ifp->if_index; 1591 ifm->ifm_flags = ifp->if_flags; 1592 ifm->ifm_data = ifp->if_data; 1593 ifm->ifm_addrs = info->rti_addrs; 1594 if ((error = copyout(ifm, w->w_where, len)) == 0) 1595 w->w_where = (char *)w->w_where + len; 1596 return error; 1597 } 1598 1599 static int 1600 sysctl_iflist_addr(struct rt_walkarg *w, struct ifaddr *ifa, 1601 struct rt_addrinfo *info) 1602 { 1603 int len, error; 1604 1605 if ((error = rt_msg2(RTM_XNEWADDR, info, 0, w, &len))) 1606 return error; 1607 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1608 struct ifa_xmsghdr *ifam; 1609 1610 ifam = (struct ifa_xmsghdr *)w->w_tmem; 1611 ifam->ifam_index = ifa->ifa_ifp->if_index; 1612 ifam->ifam_flags = ifa->ifa_flags; 1613 ifam->ifam_metric = ifa->ifa_metric; 1614 ifam->ifam_addrs = info->rti_addrs; 1615 #ifndef COMPAT_RTSOCK 1616 ifam->ifam_pid = 0; 1617 ifam->ifam_addrflags = if_addrflags(ifa); 1618 #endif 1619 if ((error = copyout(w->w_tmem, w->w_where, len)) == 0) 1620 w->w_where = (char *)w->w_where + len; 1621 } 1622 return error; 1623 } 1624 1625 static int 1626 sysctl_iflist(int af, struct rt_walkarg *w, int type) 1627 { 1628 struct ifnet *ifp; 1629 struct ifaddr *ifa; 1630 struct rt_addrinfo info; 1631 int cmd, len, error = 0; 1632 int (*iflist_if)(struct ifnet *, struct rt_walkarg *, 1633 struct rt_addrinfo *, size_t); 1634 int (*iflist_addr)(struct rt_walkarg *, struct ifaddr *, 1635 struct rt_addrinfo *); 1636 int s; 1637 struct psref psref; 1638 int bound = curlwp_bind(); 1639 1640 switch (type) { 1641 case NET_RT_IFLIST: 1642 cmd = RTM_IFINFO; 1643 iflist_if = sysctl_iflist_if; 1644 iflist_addr = sysctl_iflist_addr; 1645 break; 1646 #ifdef COMPAT_14 1647 case NET_RT_OOOIFLIST: 1648 cmd = RTM_OOIFINFO; 1649 iflist_if = compat_14_iflist; 1650 iflist_addr = compat_70_iflist_addr; 1651 break; 1652 #endif 1653 #ifdef COMPAT_50 1654 case NET_RT_OOIFLIST: 1655 cmd = RTM_OIFINFO; 1656 iflist_if = compat_50_iflist; 1657 iflist_addr = compat_70_iflist_addr; 1658 break; 1659 #endif 1660 #ifdef COMPAT_70 1661 case NET_RT_OIFLIST: 1662 cmd = RTM_IFINFO; 1663 iflist_if = sysctl_iflist_if; 1664 iflist_addr = compat_70_iflist_addr; 1665 break; 1666 #endif 1667 default: 1668 #ifdef DIAGNOSTIC 1669 printf("sysctl_iflist\n"); 1670 #endif 1671 return EINVAL; 1672 } 1673 1674 memset(&info, 0, sizeof(info)); 1675 1676 s = pserialize_read_enter(); 1677 IFNET_READER_FOREACH(ifp) { 1678 if (w->w_arg && w->w_arg != ifp->if_index) 1679 continue; 1680 if (IFADDR_READER_EMPTY(ifp)) 1681 continue; 1682 1683 psref_acquire(&psref, &ifp->if_psref, ifnet_psref_class); 1684 pserialize_read_exit(s); 1685 1686 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1687 switch (type) { 1688 case NET_RT_IFLIST: 1689 error = rt_msg2(RTM_IFINFO, &info, NULL, w, &len); 1690 break; 1691 #ifdef COMPAT_14 1692 case NET_RT_OOIFLIST: 1693 error = rt_msg2(RTM_OOIFINFO, &info, NULL, w, &len); 1694 break; 1695 #endif 1696 #ifdef COMPAT_50 1697 case NET_RT_OIFLIST: 1698 error = rt_msg2(RTM_OIFINFO, &info, NULL, w, &len); 1699 break; 1700 #endif 1701 default: 1702 panic("sysctl_iflist(1)"); 1703 } 1704 if (error) 1705 goto release_exit; 1706 info.rti_info[RTAX_IFP] = NULL; 1707 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1708 switch (type) { 1709 case NET_RT_IFLIST: { 1710 struct if_xmsghdr *ifm; 1711 1712 ifm = (struct if_xmsghdr *)w->w_tmem; 1713 ifm->ifm_index = ifp->if_index; 1714 ifm->ifm_flags = ifp->if_flags; 1715 ifm->ifm_data = ifp->if_data; 1716 ifm->ifm_addrs = info.rti_addrs; 1717 error = copyout(ifm, w->w_where, len); 1718 if (error) 1719 goto release_exit; 1720 w->w_where = (char *)w->w_where + len; 1721 break; 1722 } 1723 1724 #ifdef COMPAT_14 1725 case NET_RT_OOIFLIST: 1726 error = compat_14_iflist(ifp, w, &info, len); 1727 if (error) 1728 goto release_exit; 1729 break; 1730 #endif 1731 #ifdef COMPAT_50 1732 case NET_RT_OIFLIST: 1733 error = compat_50_iflist(ifp, w, &info, len); 1734 if (error) 1735 goto release_exit; 1736 break; 1737 #endif 1738 default: 1739 panic("sysctl_iflist(2)"); 1740 } 1741 } 1742 IFADDR_READER_FOREACH(ifa, ifp) { 1743 if (af && af != ifa->ifa_addr->sa_family) 1744 continue; 1745 info.rti_info[RTAX_IFA] = ifa->ifa_addr; 1746 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1747 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1748 if ((error = iflist_addr(w, ifa, &info)) != 0) 1749 goto release_exit; 1750 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1751 struct ifa_xmsghdr *ifam; 1752 1753 ifam = (struct ifa_xmsghdr *)w->w_tmem; 1754 ifam->ifam_index = ifa->ifa_ifp->if_index; 1755 ifam->ifam_flags = ifa->ifa_flags; 1756 ifam->ifam_metric = ifa->ifa_metric; 1757 ifam->ifam_addrs = info.rti_addrs; 1758 error = copyout(w->w_tmem, w->w_where, len); 1759 if (error) 1760 goto release_exit; 1761 w->w_where = (char *)w->w_where + len; 1762 } 1763 } 1764 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] = 1765 info.rti_info[RTAX_BRD] = NULL; 1766 1767 s = pserialize_read_enter(); 1768 psref_release(&psref, &ifp->if_psref, ifnet_psref_class); 1769 } 1770 pserialize_read_exit(s); 1771 curlwp_bindx(bound); 1772 1773 return 0; 1774 1775 release_exit: 1776 psref_release(&psref, &ifp->if_psref, ifnet_psref_class); 1777 curlwp_bindx(bound); 1778 return error; 1779 } 1780 1781 static int 1782 sysctl_rtable(SYSCTLFN_ARGS) 1783 { 1784 void *where = oldp; 1785 size_t *given = oldlenp; 1786 int i, s, error = EINVAL; 1787 u_char af; 1788 struct rt_walkarg w; 1789 1790 if (namelen == 1 && name[0] == CTL_QUERY) 1791 return sysctl_query(SYSCTLFN_CALL(rnode)); 1792 1793 if (newp) 1794 return EPERM; 1795 if (namelen != 3) 1796 return EINVAL; 1797 af = name[0]; 1798 w.w_tmemneeded = 0; 1799 w.w_tmemsize = 0; 1800 w.w_tmem = NULL; 1801 again: 1802 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 1803 if (w.w_tmemneeded) { 1804 w.w_tmem = malloc(w.w_tmemneeded, M_RTABLE, M_WAITOK); 1805 w.w_tmemsize = w.w_tmemneeded; 1806 w.w_tmemneeded = 0; 1807 } 1808 w.w_op = name[1]; 1809 w.w_arg = name[2]; 1810 w.w_given = *given; 1811 w.w_needed = 0 - w.w_given; 1812 w.w_where = where; 1813 1814 s = splsoftnet(); 1815 switch (w.w_op) { 1816 1817 case NET_RT_DUMP: 1818 case NET_RT_FLAGS: 1819 #ifdef INET 1820 /* 1821 * take care of llinfo entries, the caller must 1822 * specify an AF 1823 */ 1824 if (w.w_op == NET_RT_FLAGS && 1825 (w.w_arg == 0 || w.w_arg & RTF_LLDATA)) { 1826 if (af != 0) 1827 error = lltable_sysctl_dumparp(af, &w); 1828 else 1829 error = EINVAL; 1830 break; 1831 } 1832 #endif /* INET */ 1833 1834 for (i = 1; i <= AF_MAX; i++) 1835 if ((af == 0 || af == i) && 1836 (error = rt_walktree(i, sysctl_dumpentry, &w))) 1837 break; 1838 break; 1839 1840 #ifdef COMPAT_14 1841 case NET_RT_OOOIFLIST: 1842 error = sysctl_iflist(af, &w, w.w_op); 1843 break; 1844 #endif 1845 #ifdef COMPAT_50 1846 case NET_RT_OOIFLIST: 1847 error = sysctl_iflist(af, &w, w.w_op); 1848 break; 1849 #endif 1850 #ifdef COMPAT_70 1851 case NET_RT_OIFLIST: 1852 error = sysctl_iflist(af, &w, w.w_op); 1853 break; 1854 #endif 1855 case NET_RT_IFLIST: 1856 error = sysctl_iflist(af, &w, w.w_op); 1857 break; 1858 } 1859 splx(s); 1860 1861 /* check to see if we couldn't allocate memory with NOWAIT */ 1862 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 1863 goto again; 1864 1865 if (w.w_tmem) 1866 free(w.w_tmem, M_RTABLE); 1867 w.w_needed += w.w_given; 1868 if (where) { 1869 *given = (char *)w.w_where - (char *)where; 1870 if (*given < w.w_needed) 1871 return ENOMEM; 1872 } else { 1873 *given = (11 * w.w_needed) / 10; 1874 } 1875 return error; 1876 } 1877 1878 /* 1879 * Routing message software interrupt routine 1880 */ 1881 static void 1882 COMPATNAME(route_intr)(void *cookie) 1883 { 1884 struct sockproto proto = { .sp_family = PF_XROUTE, }; 1885 struct route_info * const ri = &COMPATNAME(route_info); 1886 struct mbuf *m; 1887 1888 mutex_enter(softnet_lock); 1889 KERNEL_LOCK(1, NULL); 1890 for (;;) { 1891 IFQ_LOCK(&ri->ri_intrq); 1892 IF_DEQUEUE(&ri->ri_intrq, m); 1893 IFQ_UNLOCK(&ri->ri_intrq); 1894 if (m == NULL) 1895 break; 1896 proto.sp_protocol = M_GETCTX(m, uintptr_t); 1897 raw_input(m, &proto, &ri->ri_src, &ri->ri_dst); 1898 } 1899 KERNEL_UNLOCK_ONE(NULL); 1900 mutex_exit(softnet_lock); 1901 } 1902 1903 /* 1904 * Enqueue a message to the software interrupt routine. 1905 */ 1906 void 1907 COMPATNAME(route_enqueue)(struct mbuf *m, int family) 1908 { 1909 struct route_info * const ri = &COMPATNAME(route_info); 1910 int wasempty; 1911 1912 IFQ_LOCK(&ri->ri_intrq); 1913 if (IF_QFULL(&ri->ri_intrq)) { 1914 IF_DROP(&ri->ri_intrq); 1915 IFQ_UNLOCK(&ri->ri_intrq); 1916 m_freem(m); 1917 } else { 1918 wasempty = IF_IS_EMPTY(&ri->ri_intrq); 1919 M_SETCTX(m, (uintptr_t)family); 1920 IF_ENQUEUE(&ri->ri_intrq, m); 1921 IFQ_UNLOCK(&ri->ri_intrq); 1922 if (wasempty) { 1923 kpreempt_disable(); 1924 softint_schedule(ri->ri_sih); 1925 kpreempt_enable(); 1926 } 1927 } 1928 } 1929 1930 static void 1931 COMPATNAME(route_init)(void) 1932 { 1933 struct route_info * const ri = &COMPATNAME(route_info); 1934 1935 #ifndef COMPAT_RTSOCK 1936 rt_init(); 1937 #endif 1938 1939 sysctl_net_route_setup(NULL); 1940 ri->ri_intrq.ifq_maxlen = ri->ri_maxqlen; 1941 ri->ri_sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 1942 COMPATNAME(route_intr), NULL); 1943 IFQ_LOCK_INIT(&ri->ri_intrq); 1944 } 1945 1946 /* 1947 * Definitions of protocols supported in the ROUTE domain. 1948 */ 1949 #ifndef COMPAT_RTSOCK 1950 PR_WRAP_USRREQS(route); 1951 #else 1952 PR_WRAP_USRREQS(compat_50_route); 1953 #endif 1954 1955 static const struct pr_usrreqs route_usrreqs = { 1956 .pr_attach = COMPATNAME(route_attach_wrapper), 1957 .pr_detach = COMPATNAME(route_detach_wrapper), 1958 .pr_accept = COMPATNAME(route_accept_wrapper), 1959 .pr_bind = COMPATNAME(route_bind_wrapper), 1960 .pr_listen = COMPATNAME(route_listen_wrapper), 1961 .pr_connect = COMPATNAME(route_connect_wrapper), 1962 .pr_connect2 = COMPATNAME(route_connect2_wrapper), 1963 .pr_disconnect = COMPATNAME(route_disconnect_wrapper), 1964 .pr_shutdown = COMPATNAME(route_shutdown_wrapper), 1965 .pr_abort = COMPATNAME(route_abort_wrapper), 1966 .pr_ioctl = COMPATNAME(route_ioctl_wrapper), 1967 .pr_stat = COMPATNAME(route_stat_wrapper), 1968 .pr_peeraddr = COMPATNAME(route_peeraddr_wrapper), 1969 .pr_sockaddr = COMPATNAME(route_sockaddr_wrapper), 1970 .pr_rcvd = COMPATNAME(route_rcvd_wrapper), 1971 .pr_recvoob = COMPATNAME(route_recvoob_wrapper), 1972 .pr_send = COMPATNAME(route_send_wrapper), 1973 .pr_sendoob = COMPATNAME(route_sendoob_wrapper), 1974 .pr_purgeif = COMPATNAME(route_purgeif_wrapper), 1975 }; 1976 1977 static const struct protosw COMPATNAME(route_protosw)[] = { 1978 { 1979 .pr_type = SOCK_RAW, 1980 .pr_domain = &COMPATNAME(routedomain), 1981 .pr_flags = PR_ATOMIC|PR_ADDR, 1982 .pr_input = raw_input, 1983 .pr_ctlinput = raw_ctlinput, 1984 .pr_usrreqs = &route_usrreqs, 1985 .pr_init = raw_init, 1986 }, 1987 }; 1988 1989 struct domain COMPATNAME(routedomain) = { 1990 .dom_family = PF_XROUTE, 1991 .dom_name = DOMAINNAME, 1992 .dom_init = COMPATNAME(route_init), 1993 .dom_protosw = COMPATNAME(route_protosw), 1994 .dom_protoswNPROTOSW = 1995 &COMPATNAME(route_protosw)[__arraycount(COMPATNAME(route_protosw))], 1996 }; 1997 1998 static void 1999 sysctl_net_route_setup(struct sysctllog **clog) 2000 { 2001 const struct sysctlnode *rnode = NULL; 2002 2003 sysctl_createv(clog, 0, NULL, &rnode, 2004 CTLFLAG_PERMANENT, 2005 CTLTYPE_NODE, DOMAINNAME, 2006 SYSCTL_DESCR("PF_ROUTE information"), 2007 NULL, 0, NULL, 0, 2008 CTL_NET, PF_XROUTE, CTL_EOL); 2009 2010 sysctl_createv(clog, 0, NULL, NULL, 2011 CTLFLAG_PERMANENT, 2012 CTLTYPE_NODE, "rtable", 2013 SYSCTL_DESCR("Routing table information"), 2014 sysctl_rtable, 0, NULL, 0, 2015 CTL_NET, PF_XROUTE, 0 /* any protocol */, CTL_EOL); 2016 2017 sysctl_createv(clog, 0, &rnode, NULL, 2018 CTLFLAG_PERMANENT, 2019 CTLTYPE_STRUCT, "stats", 2020 SYSCTL_DESCR("Routing statistics"), 2021 NULL, 0, &rtstat, sizeof(rtstat), 2022 CTL_CREATE, CTL_EOL); 2023 } 2024
Indexes created Fri Oct 03 02:09:57 GMT 2025