| 1 | /* $NetBSD: rtsock.c,v 1.198 2016/10/26 06:49:10 ozaki-r 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 1.198 2016/10/26 06:49:10 ozaki-r 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 | rtfree(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 | if (oifa && oifa->ifa_rtrequest) |
| 641 | oifa->ifa_rtrequest(RTM_DELETE, rt, info); |
| 642 | rt_replace_ifa(rt, ifa); |
| 643 | rt->rt_ifp = new_ifp; |
| 644 | } |
| 645 | if (new_ifa == NULL) |
| 646 | ifa_release(ifa, &psref_ifa); |
| 647 | } |
| 648 | ifa_release(new_ifa, &psref_new_ifa); |
| 649 | if (new_ifp && rt->rt_ifp != new_ifp) |
| 650 | rt->rt_ifp = new_ifp; |
| 651 | rt_setmetrics(rtm->rtm_inits, rtm, rt); |
| 652 | if (rt->rt_flags != info->rti_flags) |
| 653 | rt->rt_flags = (info->rti_flags & ~PRESERVED_RTF) |
| 654 | | (rt->rt_flags & PRESERVED_RTF); |
| 655 | if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) |
| 656 | rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, info); |
| 657 | out: |
| 658 | if_put(ifp, &psref_ifp); |
| 659 | |
| 660 | return error; |
| 661 | } |
| 662 | |
| 663 | /*ARGSUSED*/ |
| 664 | int |
| 665 | COMPATNAME(route_output)(struct mbuf *m, struct socket *so) |
| 666 | { |
| 667 | struct sockproto proto = { .sp_family = PF_XROUTE, }; |
| 668 | struct rt_xmsghdr *rtm = NULL; |
| 669 | struct rt_xmsghdr *old_rtm = NULL, *new_rtm = NULL; |
| 670 | struct rtentry *rt = NULL; |
| 671 | struct rtentry *saved_nrt = NULL; |
| 672 | struct rt_addrinfo info; |
| 673 | int len, error = 0; |
| 674 | sa_family_t family; |
| 675 | struct sockaddr_dl sdl; |
| 676 | int bound = curlwp_bind(); |
| 677 | |
| 678 | #define senderr(e) do { error = e; goto flush;} while (/*CONSTCOND*/ 0) |
| 679 | if (m == NULL || ((m->m_len < sizeof(int32_t)) && |
| 680 | (m = m_pullup(m, sizeof(int32_t))) == NULL)) { |
| 681 | error = ENOBUFS; |
| 682 | goto out; |
| 683 | } |
| 684 | if ((m->m_flags & M_PKTHDR) == 0) |
| 685 | panic("%s" , __func__); |
| 686 | len = m->m_pkthdr.len; |
| 687 | if (len < sizeof(*rtm) || |
| 688 | len != mtod(m, struct rt_xmsghdr *)->rtm_msglen) { |
| 689 | info.rti_info[RTAX_DST] = NULL; |
| 690 | senderr(EINVAL); |
| 691 | } |
| 692 | R_Malloc(rtm, struct rt_xmsghdr *, len); |
| 693 | if (rtm == NULL) { |
| 694 | info.rti_info[RTAX_DST] = NULL; |
| 695 | senderr(ENOBUFS); |
| 696 | } |
| 697 | m_copydata(m, 0, len, rtm); |
| 698 | if (rtm->rtm_version != RTM_XVERSION) { |
| 699 | info.rti_info[RTAX_DST] = NULL; |
| 700 | senderr(EPROTONOSUPPORT); |
| 701 | } |
| 702 | rtm->rtm_pid = curproc->p_pid; |
| 703 | memset(&info, 0, sizeof(info)); |
| 704 | info.rti_addrs = rtm->rtm_addrs; |
| 705 | if (rt_xaddrs(rtm->rtm_type, (const char *)(rtm + 1), len + (char *)rtm, |
| 706 | &info)) { |
| 707 | senderr(EINVAL); |
| 708 | } |
| 709 | info.rti_flags = rtm->rtm_flags; |
| 710 | #ifdef RTSOCK_DEBUG |
| 711 | if (info.rti_info[RTAX_DST]->sa_family == AF_INET) { |
| 712 | char abuf[INET_ADDRSTRLEN]; |
| 713 | printf("%s: extracted info.rti_info[RTAX_DST] %s\n" , __func__, |
| 714 | RT_IN_PRINT(&info, abuf, RTAX_DST)); |
| 715 | } |
| 716 | #endif /* RTSOCK_DEBUG */ |
| 717 | if (info.rti_info[RTAX_DST] == NULL || |
| 718 | (info.rti_info[RTAX_DST]->sa_family >= AF_MAX)) { |
| 719 | senderr(EINVAL); |
| 720 | } |
| 721 | if (info.rti_info[RTAX_GATEWAY] != NULL && |
| 722 | (info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) { |
| 723 | senderr(EINVAL); |
| 724 | } |
| 725 | |
| 726 | /* |
| 727 | * Verify that the caller has the appropriate privilege; RTM_GET |
| 728 | * is the only operation the non-superuser is allowed. |
| 729 | */ |
| 730 | if (kauth_authorize_network(curlwp->l_cred, KAUTH_NETWORK_ROUTE, |
| 731 | 0, rtm, NULL, NULL) != 0) |
| 732 | senderr(EACCES); |
| 733 | |
| 734 | switch (rtm->rtm_type) { |
| 735 | |
| 736 | case RTM_ADD: |
| 737 | if (info.rti_info[RTAX_GATEWAY] == NULL) { |
| 738 | senderr(EINVAL); |
| 739 | } |
| 740 | #ifdef INET |
| 741 | /* support for new ARP code with keeping backcompat */ |
| 742 | if (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) { |
| 743 | const struct sockaddr_dl *sdlp = |
| 744 | satocsdl(info.rti_info[RTAX_GATEWAY]); |
| 745 | |
| 746 | /* Allow routing requests by interface index */ |
| 747 | if (sdlp->sdl_nlen == 0 && sdlp->sdl_alen == 0 |
| 748 | && sdlp->sdl_slen == 0) |
| 749 | goto fallback; |
| 750 | /* |
| 751 | * Old arp binaries don't set the sdl_index |
| 752 | * so we have to complement it. |
| 753 | */ |
| 754 | int sdl_index = sdlp->sdl_index; |
| 755 | if (sdl_index == 0) { |
| 756 | error = route_get_sdl_index(&info, &sdl_index); |
| 757 | if (error != 0) |
| 758 | goto fallback; |
| 759 | } else if ( |
| 760 | info.rti_info[RTAX_DST]->sa_family == AF_INET) { |
| 761 | /* |
| 762 | * XXX workaround for SIN_PROXY case; proxy arp |
| 763 | * entry should be in an interface that has |
| 764 | * a network route including the destination, |
| 765 | * not a local (link) route that may not be a |
| 766 | * desired place, for example a tap. |
| 767 | */ |
| 768 | const struct sockaddr_inarp *sina = |
| 769 | (const struct sockaddr_inarp *) |
| 770 | info.rti_info[RTAX_DST]; |
| 771 | if (sina->sin_other & SIN_PROXY) { |
| 772 | error = route_get_sdl_index(&info, |
| 773 | &sdl_index); |
| 774 | if (error != 0) |
| 775 | goto fallback; |
| 776 | } |
| 777 | } |
| 778 | error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, |
| 779 | rtm->rtm_rmx.rmx_expire, &info, sdl_index); |
| 780 | break; |
| 781 | } |
| 782 | fallback: |
| 783 | #endif /* INET */ |
| 784 | error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); |
| 785 | if (error == 0) { |
| 786 | rt_setmetrics(rtm->rtm_inits, rtm, saved_nrt); |
| 787 | rtfree(saved_nrt); |
| 788 | } |
| 789 | break; |
| 790 | |
| 791 | case RTM_DELETE: |
| 792 | #ifdef INET |
| 793 | /* support for new ARP code */ |
| 794 | if (info.rti_info[RTAX_GATEWAY] && |
| 795 | (info.rti_info[RTAX_GATEWAY]->sa_family == AF_LINK) && |
| 796 | (rtm->rtm_flags & RTF_LLDATA) != 0) { |
| 797 | error = lla_rt_output(rtm->rtm_type, rtm->rtm_flags, |
| 798 | rtm->rtm_rmx.rmx_expire, &info, 0); |
| 799 | break; |
| 800 | } |
| 801 | #endif /* INET */ |
| 802 | error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); |
| 803 | if (error != 0) |
| 804 | break; |
| 805 | |
| 806 | rt = saved_nrt; |
| 807 | info.rti_info[RTAX_DST] = rt_getkey(rt); |
| 808 | info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; |
| 809 | info.rti_info[RTAX_NETMASK] = rt_mask(rt); |
| 810 | info.rti_info[RTAX_TAG] = rt_gettag(rt); |
| 811 | error = route_output_report(rt, &info, rtm, &new_rtm); |
| 812 | if (error) |
| 813 | senderr(error); |
| 814 | if (new_rtm != NULL) { |
| 815 | old_rtm = rtm; |
| 816 | rtm = new_rtm; |
| 817 | } |
| 818 | break; |
| 819 | |
| 820 | case RTM_GET: |
| 821 | case RTM_CHANGE: |
| 822 | case RTM_LOCK: |
| 823 | /* XXX This will mask info.rti_info[RTAX_DST] with |
| 824 | * info.rti_info[RTAX_NETMASK] before |
| 825 | * searching. It did not used to do that. --dyoung |
| 826 | */ |
| 827 | rt = NULL; |
| 828 | error = rtrequest1(RTM_GET, &info, &rt); |
| 829 | if (error != 0) |
| 830 | senderr(error); |
| 831 | if (rtm->rtm_type != RTM_GET) {/* XXX: too grotty */ |
| 832 | if (memcmp(info.rti_info[RTAX_DST], rt_getkey(rt), |
| 833 | info.rti_info[RTAX_DST]->sa_len) != 0) |
| 834 | senderr(ESRCH); |
| 835 | if (info.rti_info[RTAX_NETMASK] == NULL && |
| 836 | rt_mask(rt) != NULL) |
| 837 | senderr(ETOOMANYREFS); |
| 838 | } |
| 839 | |
| 840 | /* |
| 841 | * XXX if arp/ndp requests an L2 entry, we have to obtain |
| 842 | * it from lltable while for the route command we have to |
| 843 | * return a route as it is. How to distinguish them? |
| 844 | * For newer arp/ndp, RTF_LLDATA flag set by arp/ndp |
| 845 | * indicates an L2 entry is requested. For old arp/ndp |
| 846 | * binaries, we check RTF_UP flag is NOT set; it works |
| 847 | * by the fact that arp/ndp don't set it while the route |
| 848 | * command sets it. |
| 849 | */ |
| 850 | if (((rtm->rtm_flags & RTF_LLDATA) != 0 || |
| 851 | (rtm->rtm_flags & RTF_UP) == 0) && |
| 852 | rtm->rtm_type == RTM_GET && |
| 853 | sockaddr_cmp(rt_getkey(rt), info.rti_info[RTAX_DST]) != 0) { |
| 854 | int ll_flags = 0; |
| 855 | route_get_sdl(rt->rt_ifp, info.rti_info[RTAX_DST], &sdl, |
| 856 | &ll_flags); |
| 857 | info.rti_info[RTAX_GATEWAY] = sstocsa(&sdl); |
| 858 | error = route_output_report(rt, &info, rtm, &new_rtm); |
| 859 | if (error) |
| 860 | senderr(error); |
| 861 | if (new_rtm != NULL) { |
| 862 | old_rtm = rtm; |
| 863 | rtm = new_rtm; |
| 864 | } |
| 865 | rtm->rtm_flags |= RTF_LLDATA; |
| 866 | rtm->rtm_flags |= (ll_flags & LLE_STATIC) ? RTF_STATIC : 0; |
| 867 | break; |
| 868 | } |
| 869 | |
| 870 | switch (rtm->rtm_type) { |
| 871 | case RTM_GET: |
| 872 | info.rti_info[RTAX_DST] = rt_getkey(rt); |
| 873 | info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; |
| 874 | info.rti_info[RTAX_NETMASK] = rt_mask(rt); |
| 875 | info.rti_info[RTAX_TAG] = rt_gettag(rt); |
| 876 | error = route_output_report(rt, &info, rtm, &new_rtm); |
| 877 | if (error) |
| 878 | senderr(error); |
| 879 | if (new_rtm != NULL) { |
| 880 | old_rtm = rtm; |
| 881 | rtm = new_rtm; |
| 882 | } |
| 883 | break; |
| 884 | |
| 885 | case RTM_CHANGE: |
| 886 | error = route_output_change(rt, &info, rtm); |
| 887 | if (error != 0) |
| 888 | goto flush; |
| 889 | /*FALLTHROUGH*/ |
| 890 | case RTM_LOCK: |
| 891 | rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); |
| 892 | rt->rt_rmx.rmx_locks |= |
| 893 | (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); |
| 894 | break; |
| 895 | } |
| 896 | break; |
| 897 | |
| 898 | default: |
| 899 | senderr(EOPNOTSUPP); |
| 900 | } |
| 901 | |
| 902 | flush: |
| 903 | if (rtm) { |
| 904 | if (error) |
| 905 | rtm->rtm_errno = error; |
| 906 | else |
| 907 | rtm->rtm_flags |= RTF_DONE; |
| 908 | } |
| 909 | family = info.rti_info[RTAX_DST] ? info.rti_info[RTAX_DST]->sa_family : |
| 910 | 0; |
| 911 | /* We cannot free old_rtm until we have stopped using the |
| 912 | * pointers in info, some of which may point to sockaddrs |
| 913 | * in old_rtm. |
| 914 | */ |
| 915 | if (old_rtm != NULL) |
| 916 | Free(old_rtm); |
| 917 | if (rt) |
| 918 | rtfree(rt); |
| 919 | { |
| 920 | struct rawcb *rp = NULL; |
| 921 | /* |
| 922 | * Check to see if we don't want our own messages. |
| 923 | */ |
| 924 | if ((so->so_options & SO_USELOOPBACK) == 0) { |
| 925 | if (COMPATNAME(route_info).ri_cb.any_count <= 1) { |
| 926 | if (rtm) |
| 927 | Free(rtm); |
| 928 | m_freem(m); |
| 929 | goto out; |
| 930 | } |
| 931 | /* There is another listener, so construct message */ |
| 932 | rp = sotorawcb(so); |
| 933 | } |
| 934 | if (rtm) { |
| 935 | m_copyback(m, 0, rtm->rtm_msglen, rtm); |
| 936 | if (m->m_pkthdr.len < rtm->rtm_msglen) { |
| 937 | m_freem(m); |
| 938 | m = NULL; |
| 939 | } else if (m->m_pkthdr.len > rtm->rtm_msglen) |
| 940 | m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); |
| 941 | Free(rtm); |
| 942 | } |
| 943 | if (rp) |
| 944 | rp->rcb_proto.sp_family = 0; /* Avoid us */ |
| 945 | if (family) |
| 946 | proto.sp_protocol = family; |
| 947 | if (m) |
| 948 | raw_input(m, &proto, &COMPATNAME(route_info).ri_src, |
| 949 | &COMPATNAME(route_info).ri_dst); |
| 950 | if (rp) |
| 951 | rp->rcb_proto.sp_family = PF_XROUTE; |
| 952 | } |
| 953 | out: |
| 954 | curlwp_bindx(bound); |
| 955 | return error; |
| 956 | } |
| 957 | |
| 958 | static void |
| 959 | rt_setmetrics(int which, const struct rt_xmsghdr *in, struct rtentry *out) |
| 960 | { |
| 961 | #define metric(f, e) if (which & (f)) out->rt_rmx.e = in->rtm_rmx.e; |
| 962 | metric(RTV_RPIPE, rmx_recvpipe); |
| 963 | metric(RTV_SPIPE, rmx_sendpipe); |
| 964 | metric(RTV_SSTHRESH, rmx_ssthresh); |
| 965 | metric(RTV_RTT, rmx_rtt); |
| 966 | metric(RTV_RTTVAR, rmx_rttvar); |
| 967 | metric(RTV_HOPCOUNT, rmx_hopcount); |
| 968 | metric(RTV_MTU, rmx_mtu); |
| 969 | #undef metric |
| 970 | if (which & RTV_EXPIRE) { |
| 971 | out->rt_rmx.rmx_expire = in->rtm_rmx.rmx_expire ? |
| 972 | time_wall_to_mono(in->rtm_rmx.rmx_expire) : 0; |
| 973 | } |
| 974 | } |
| 975 | |
| 976 | static void |
| 977 | rtm_setmetrics(const struct rtentry *in, struct rt_xmsghdr *out) |
| 978 | { |
| 979 | #define metric(e) out->rtm_rmx.e = in->rt_rmx.e; |
| 980 | metric(rmx_recvpipe); |
| 981 | metric(rmx_sendpipe); |
| 982 | metric(rmx_ssthresh); |
| 983 | metric(rmx_rtt); |
| 984 | metric(rmx_rttvar); |
| 985 | metric(rmx_hopcount); |
| 986 | metric(rmx_mtu); |
| 987 | #undef metric |
| 988 | out->rtm_rmx.rmx_expire = in->rt_rmx.rmx_expire ? |
| 989 | time_mono_to_wall(in->rt_rmx.rmx_expire) : 0; |
| 990 | } |
| 991 | |
| 992 | static int |
| 993 | rt_xaddrs(u_char rtmtype, const char *cp, const char *cplim, |
| 994 | struct rt_addrinfo *rtinfo) |
| 995 | { |
| 996 | const struct sockaddr *sa = NULL; /* Quell compiler warning */ |
| 997 | int i; |
| 998 | |
| 999 | for (i = 0; i < RTAX_MAX && cp < cplim; i++) { |
| 1000 | if ((rtinfo->rti_addrs & (1 << i)) == 0) |
| 1001 | continue; |
| 1002 | rtinfo->rti_info[i] = sa = (const struct sockaddr *)cp; |
| 1003 | RT_XADVANCE(cp, sa); |
| 1004 | } |
| 1005 | |
| 1006 | /* |
| 1007 | * Check for extra addresses specified, except RTM_GET asking |
| 1008 | * for interface info. |
| 1009 | */ |
| 1010 | if (rtmtype == RTM_GET) { |
| 1011 | if (((rtinfo->rti_addrs & |
| 1012 | (~((1 << RTAX_IFP) | (1 << RTAX_IFA)))) & (~0U << i)) != 0) |
| 1013 | return 1; |
| 1014 | } else if ((rtinfo->rti_addrs & (~0U << i)) != 0) |
| 1015 | return 1; |
| 1016 | /* Check for bad data length. */ |
| 1017 | if (cp != cplim) { |
| 1018 | if (i == RTAX_NETMASK + 1 && sa != NULL && |
| 1019 | cp - RT_XROUNDUP(sa->sa_len) + sa->sa_len == cplim) |
| 1020 | /* |
| 1021 | * The last sockaddr was info.rti_info[RTAX_NETMASK]. |
| 1022 | * We accept this for now for the sake of old |
| 1023 | * binaries or third party softwares. |
| 1024 | */ |
| 1025 | ; |
| 1026 | else |
| 1027 | return 1; |
| 1028 | } |
| 1029 | return 0; |
| 1030 | } |
| 1031 | |
| 1032 | static int |
| 1033 | rt_getlen(int type) |
| 1034 | { |
| 1035 | #ifndef COMPAT_RTSOCK |
| 1036 | CTASSERT(__alignof(struct ifa_msghdr) >= sizeof(uint64_t)); |
| 1037 | CTASSERT(__alignof(struct if_msghdr) >= sizeof(uint64_t)); |
| 1038 | CTASSERT(__alignof(struct if_announcemsghdr) >= sizeof(uint64_t)); |
| 1039 | CTASSERT(__alignof(struct rt_msghdr) >= sizeof(uint64_t)); |
| 1040 | #endif |
| 1041 | |
| 1042 | switch (type) { |
| 1043 | case RTM_ODELADDR: |
| 1044 | case RTM_ONEWADDR: |
| 1045 | case RTM_OCHGADDR: |
| 1046 | #ifdef COMPAT_70 |
| 1047 | return sizeof(struct ifa_msghdr70); |
| 1048 | #else |
| 1049 | #ifdef DIAGNOSTIC |
| 1050 | printf("RTM_ONEWADDR\n" ); |
| 1051 | #endif |
| 1052 | return -1; |
| 1053 | #endif |
| 1054 | case RTM_DELADDR: |
| 1055 | case RTM_NEWADDR: |
| 1056 | case RTM_CHGADDR: |
| 1057 | return sizeof(struct ifa_xmsghdr); |
| 1058 | |
| 1059 | case RTM_OOIFINFO: |
| 1060 | #ifdef COMPAT_14 |
| 1061 | return sizeof(struct if_msghdr14); |
| 1062 | #else |
| 1063 | #ifdef DIAGNOSTIC |
| 1064 | printf("RTM_OOIFINFO\n" ); |
| 1065 | #endif |
| 1066 | return -1; |
| 1067 | #endif |
| 1068 | case RTM_OIFINFO: |
| 1069 | #ifdef COMPAT_50 |
| 1070 | return sizeof(struct if_msghdr50); |
| 1071 | #else |
| 1072 | #ifdef DIAGNOSTIC |
| 1073 | printf("RTM_OIFINFO\n" ); |
| 1074 | #endif |
| 1075 | return -1; |
| 1076 | #endif |
| 1077 | |
| 1078 | case RTM_IFINFO: |
| 1079 | return sizeof(struct if_xmsghdr); |
| 1080 | |
| 1081 | case RTM_IFANNOUNCE: |
| 1082 | case RTM_IEEE80211: |
| 1083 | return sizeof(struct if_xannouncemsghdr); |
| 1084 | |
| 1085 | default: |
| 1086 | return sizeof(struct rt_xmsghdr); |
| 1087 | } |
| 1088 | } |
| 1089 | |
| 1090 | |
| 1091 | struct mbuf * |
| 1092 | COMPATNAME(rt_msg1)(int type, struct rt_addrinfo *rtinfo, void *data, int datalen) |
| 1093 | { |
| 1094 | struct rt_xmsghdr *rtm; |
| 1095 | struct mbuf *m; |
| 1096 | int i; |
| 1097 | const struct sockaddr *sa; |
| 1098 | int len, dlen; |
| 1099 | |
| 1100 | m = m_gethdr(M_DONTWAIT, MT_DATA); |
| 1101 | if (m == NULL) |
| 1102 | return m; |
| 1103 | MCLAIM(m, &COMPATNAME(routedomain).dom_mowner); |
| 1104 | |
| 1105 | if ((len = rt_getlen(type)) == -1) |
| 1106 | goto out; |
| 1107 | if (len > MHLEN + MLEN) |
| 1108 | panic("%s: message too long" , __func__); |
| 1109 | else if (len > MHLEN) { |
| 1110 | m->m_next = m_get(M_DONTWAIT, MT_DATA); |
| 1111 | if (m->m_next == NULL) |
| 1112 | goto out; |
| 1113 | MCLAIM(m->m_next, m->m_owner); |
| 1114 | m->m_pkthdr.len = len; |
| 1115 | m->m_len = MHLEN; |
| 1116 | m->m_next->m_len = len - MHLEN; |
| 1117 | } else { |
| 1118 | m->m_pkthdr.len = m->m_len = len; |
| 1119 | } |
| 1120 | m_reset_rcvif(m); |
| 1121 | m_copyback(m, 0, datalen, data); |
| 1122 | if (len > datalen) |
| 1123 | (void)memset(mtod(m, char *) + datalen, 0, len - datalen); |
| 1124 | rtm = mtod(m, struct rt_xmsghdr *); |
| 1125 | for (i = 0; i < RTAX_MAX; i++) { |
| 1126 | if ((sa = rtinfo->rti_info[i]) == NULL) |
| 1127 | continue; |
| 1128 | rtinfo->rti_addrs |= (1 << i); |
| 1129 | dlen = RT_XROUNDUP(sa->sa_len); |
| 1130 | m_copyback(m, len, sa->sa_len, sa); |
| 1131 | if (dlen != sa->sa_len) { |
| 1132 | /* |
| 1133 | * Up to 6 + 1 nul's since roundup is to |
| 1134 | * sizeof(uint64_t) (8 bytes) |
| 1135 | */ |
| 1136 | m_copyback(m, len + sa->sa_len, |
| 1137 | dlen - sa->sa_len, "\0\0\0\0\0\0" ); |
| 1138 | } |
| 1139 | len += dlen; |
| 1140 | } |
| 1141 | if (m->m_pkthdr.len != len) |
| 1142 | goto out; |
| 1143 | rtm->rtm_msglen = len; |
| 1144 | rtm->rtm_version = RTM_XVERSION; |
| 1145 | rtm->rtm_type = type; |
| 1146 | return m; |
| 1147 | out: |
| 1148 | m_freem(m); |
| 1149 | return NULL; |
| 1150 | } |
| 1151 | |
| 1152 | /* |
| 1153 | * rt_msg2 |
| 1154 | * |
| 1155 | * fills 'cp' or 'w'.w_tmem with the routing socket message and |
| 1156 | * returns the length of the message in 'lenp'. |
| 1157 | * |
| 1158 | * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold |
| 1159 | * the message |
| 1160 | * otherwise walkarg's w_needed is updated and if the user buffer is |
| 1161 | * specified and w_needed indicates space exists the information is copied |
| 1162 | * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, |
| 1163 | * if the allocation fails ENOBUFS is returned. |
| 1164 | */ |
| 1165 | static int |
| 1166 | rt_msg2(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, |
| 1167 | int *lenp) |
| 1168 | { |
| 1169 | int i; |
| 1170 | int len, dlen, second_time = 0; |
| 1171 | char *cp0, *cp = cpv; |
| 1172 | |
| 1173 | rtinfo->rti_addrs = 0; |
| 1174 | again: |
| 1175 | if ((len = rt_getlen(type)) == -1) |
| 1176 | return EINVAL; |
| 1177 | |
| 1178 | if ((cp0 = cp) != NULL) |
| 1179 | cp += len; |
| 1180 | for (i = 0; i < RTAX_MAX; i++) { |
| 1181 | const struct sockaddr *sa; |
| 1182 | |
| 1183 | if ((sa = rtinfo->rti_info[i]) == NULL) |
| 1184 | continue; |
| 1185 | rtinfo->rti_addrs |= (1 << i); |
| 1186 | dlen = RT_XROUNDUP(sa->sa_len); |
| 1187 | if (cp) { |
| 1188 | int diff = dlen - sa->sa_len; |
| 1189 | (void)memcpy(cp, sa, (size_t)sa->sa_len); |
| 1190 | cp += sa->sa_len; |
| 1191 | if (diff > 0) { |
| 1192 | (void)memset(cp, 0, (size_t)diff); |
| 1193 | cp += diff; |
| 1194 | } |
| 1195 | } |
| 1196 | len += dlen; |
| 1197 | } |
| 1198 | if (cp == NULL && w != NULL && !second_time) { |
| 1199 | struct rt_walkarg *rw = w; |
| 1200 | |
| 1201 | rw->w_needed += len; |
| 1202 | if (rw->w_needed <= 0 && rw->w_where) { |
| 1203 | if (rw->w_tmemsize < len) { |
| 1204 | if (rw->w_tmem) |
| 1205 | free(rw->w_tmem, M_RTABLE); |
| 1206 | rw->w_tmem = malloc(len, M_RTABLE, M_NOWAIT); |
| 1207 | if (rw->w_tmem) |
| 1208 | rw->w_tmemsize = len; |
| 1209 | else |
| 1210 | rw->w_tmemsize = 0; |
| 1211 | } |
| 1212 | if (rw->w_tmem) { |
| 1213 | cp = rw->w_tmem; |
| 1214 | second_time = 1; |
| 1215 | goto again; |
| 1216 | } else { |
| 1217 | rw->w_tmemneeded = len; |
| 1218 | return ENOBUFS; |
| 1219 | } |
| 1220 | } |
| 1221 | } |
| 1222 | if (cp) { |
| 1223 | struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)cp0; |
| 1224 | |
| 1225 | rtm->rtm_version = RTM_XVERSION; |
| 1226 | rtm->rtm_type = type; |
| 1227 | rtm->rtm_msglen = len; |
| 1228 | } |
| 1229 | if (lenp) |
| 1230 | *lenp = len; |
| 1231 | return 0; |
| 1232 | } |
| 1233 | |
| 1234 | #ifndef COMPAT_RTSOCK |
| 1235 | int |
| 1236 | rt_msg3(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, |
| 1237 | int *lenp) |
| 1238 | { |
| 1239 | return rt_msg2(type, rtinfo, cpv, w, lenp); |
| 1240 | } |
| 1241 | #endif |
| 1242 | |
| 1243 | /* |
| 1244 | * This routine is called to generate a message from the routing |
| 1245 | * socket indicating that a redirect has occurred, a routing lookup |
| 1246 | * has failed, or that a protocol has detected timeouts to a particular |
| 1247 | * destination. |
| 1248 | */ |
| 1249 | void |
| 1250 | COMPATNAME(rt_missmsg)(int type, const struct rt_addrinfo *rtinfo, int flags, |
| 1251 | int error) |
| 1252 | { |
| 1253 | struct rt_xmsghdr rtm; |
| 1254 | struct mbuf *m; |
| 1255 | const struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; |
| 1256 | struct rt_addrinfo info = *rtinfo; |
| 1257 | |
| 1258 | COMPATCALL(rt_missmsg, (type, rtinfo, flags, error)); |
| 1259 | if (COMPATNAME(route_info).ri_cb.any_count == 0) |
| 1260 | return; |
| 1261 | memset(&rtm, 0, sizeof(rtm)); |
| 1262 | rtm.rtm_pid = curproc->p_pid; |
| 1263 | rtm.rtm_flags = RTF_DONE | flags; |
| 1264 | rtm.rtm_errno = error; |
| 1265 | m = COMPATNAME(rt_msg1)(type, &info, &rtm, sizeof(rtm)); |
| 1266 | if (m == NULL) |
| 1267 | return; |
| 1268 | mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; |
| 1269 | COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); |
| 1270 | } |
| 1271 | |
| 1272 | /* |
| 1273 | * This routine is called to generate a message from the routing |
| 1274 | * socket indicating that the status of a network interface has changed. |
| 1275 | */ |
| 1276 | void |
| 1277 | COMPATNAME(rt_ifmsg)(struct ifnet *ifp) |
| 1278 | { |
| 1279 | struct if_xmsghdr ifm; |
| 1280 | struct mbuf *m; |
| 1281 | struct rt_addrinfo info; |
| 1282 | |
| 1283 | COMPATCALL(rt_ifmsg, (ifp)); |
| 1284 | if (COMPATNAME(route_info).ri_cb.any_count == 0) |
| 1285 | return; |
| 1286 | (void)memset(&info, 0, sizeof(info)); |
| 1287 | (void)memset(&ifm, 0, sizeof(ifm)); |
| 1288 | ifm.ifm_index = ifp->if_index; |
| 1289 | ifm.ifm_flags = ifp->if_flags; |
| 1290 | ifm.ifm_data = ifp->if_data; |
| 1291 | ifm.ifm_addrs = 0; |
| 1292 | m = COMPATNAME(rt_msg1)(RTM_IFINFO, &info, &ifm, sizeof(ifm)); |
| 1293 | if (m == NULL) |
| 1294 | return; |
| 1295 | COMPATNAME(route_enqueue)(m, 0); |
| 1296 | #ifdef COMPAT_14 |
| 1297 | compat_14_rt_oifmsg(ifp); |
| 1298 | #endif |
| 1299 | #ifdef COMPAT_50 |
| 1300 | compat_50_rt_oifmsg(ifp); |
| 1301 | #endif |
| 1302 | } |
| 1303 | |
| 1304 | #ifndef COMPAT_RTSOCK |
| 1305 | static int |
| 1306 | if_addrflags(struct ifaddr *ifa) |
| 1307 | { |
| 1308 | |
| 1309 | switch (ifa->ifa_addr->sa_family) { |
| 1310 | #ifdef INET |
| 1311 | case AF_INET: |
| 1312 | return ((struct in_ifaddr *)ifa)->ia4_flags; |
| 1313 | #endif |
| 1314 | #ifdef INET6 |
| 1315 | case AF_INET6: |
| 1316 | return ((struct in6_ifaddr *)ifa)->ia6_flags; |
| 1317 | #endif |
| 1318 | default: |
| 1319 | return 0; |
| 1320 | } |
| 1321 | } |
| 1322 | #endif |
| 1323 | |
| 1324 | /* |
| 1325 | * This is called to generate messages from the routing socket |
| 1326 | * indicating a network interface has had addresses associated with it. |
| 1327 | * if we ever reverse the logic and replace messages TO the routing |
| 1328 | * socket indicate a request to configure interfaces, then it will |
| 1329 | * be unnecessary as the routing socket will automatically generate |
| 1330 | * copies of it. |
| 1331 | */ |
| 1332 | void |
| 1333 | COMPATNAME(rt_newaddrmsg)(int cmd, struct ifaddr *ifa, int error, |
| 1334 | struct rtentry *rt) |
| 1335 | { |
| 1336 | #define cmdpass(__cmd, __pass) (((__cmd) << 2) | (__pass)) |
| 1337 | struct rt_addrinfo info; |
| 1338 | const struct sockaddr *sa; |
| 1339 | int pass; |
| 1340 | struct mbuf *m; |
| 1341 | struct ifnet *ifp; |
| 1342 | struct rt_xmsghdr rtm; |
| 1343 | struct ifa_xmsghdr ifam; |
| 1344 | int ncmd; |
| 1345 | |
| 1346 | KASSERT(ifa != NULL); |
| 1347 | KASSERT(ifa->ifa_addr != NULL); |
| 1348 | ifp = ifa->ifa_ifp; |
| 1349 | #ifdef SCTP |
| 1350 | if (cmd == RTM_ADD) { |
| 1351 | sctp_add_ip_address(ifa); |
| 1352 | } else if (cmd == RTM_DELETE) { |
| 1353 | sctp_delete_ip_address(ifa); |
| 1354 | } |
| 1355 | #endif |
| 1356 | |
| 1357 | COMPATCALL(rt_newaddrmsg, (cmd, ifa, error, rt)); |
| 1358 | if (COMPATNAME(route_info).ri_cb.any_count == 0) |
| 1359 | return; |
| 1360 | for (pass = 1; pass < 3; pass++) { |
| 1361 | memset(&info, 0, sizeof(info)); |
| 1362 | switch (cmdpass(cmd, pass)) { |
| 1363 | case cmdpass(RTM_ADD, 1): |
| 1364 | case cmdpass(RTM_CHANGE, 1): |
| 1365 | case cmdpass(RTM_DELETE, 2): |
| 1366 | case cmdpass(RTM_NEWADDR, 1): |
| 1367 | case cmdpass(RTM_DELADDR, 1): |
| 1368 | case cmdpass(RTM_CHGADDR, 1): |
| 1369 | switch (cmd) { |
| 1370 | case RTM_ADD: |
| 1371 | ncmd = RTM_XNEWADDR; |
| 1372 | break; |
| 1373 | case RTM_DELETE: |
| 1374 | ncmd = RTM_XDELADDR; |
| 1375 | break; |
| 1376 | case RTM_CHANGE: |
| 1377 | ncmd = RTM_XCHGADDR; |
| 1378 | break; |
| 1379 | case RTM_NEWADDR: |
| 1380 | ncmd = RTM_XNEWADDR; |
| 1381 | break; |
| 1382 | case RTM_DELADDR: |
| 1383 | ncmd = RTM_XDELADDR; |
| 1384 | break; |
| 1385 | case RTM_CHGADDR: |
| 1386 | ncmd = RTM_XCHGADDR; |
| 1387 | break; |
| 1388 | default: |
| 1389 | panic("%s: unknown command %d" , __func__, cmd); |
| 1390 | } |
| 1391 | #ifdef COMPAT_70 |
| 1392 | compat_70_rt_newaddrmsg1(ncmd, ifa); |
| 1393 | #endif |
| 1394 | info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; |
| 1395 | KASSERT(ifp->if_dl != NULL); |
| 1396 | info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; |
| 1397 | info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; |
| 1398 | info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; |
| 1399 | memset(&ifam, 0, sizeof(ifam)); |
| 1400 | ifam.ifam_index = ifp->if_index; |
| 1401 | ifam.ifam_metric = ifa->ifa_metric; |
| 1402 | ifam.ifam_flags = ifa->ifa_flags; |
| 1403 | #ifndef COMPAT_RTSOCK |
| 1404 | ifam.ifam_pid = curproc->p_pid; |
| 1405 | ifam.ifam_addrflags = if_addrflags(ifa); |
| 1406 | #endif |
| 1407 | m = COMPATNAME(rt_msg1)(ncmd, &info, &ifam, sizeof(ifam)); |
| 1408 | if (m == NULL) |
| 1409 | continue; |
| 1410 | mtod(m, struct ifa_xmsghdr *)->ifam_addrs = |
| 1411 | info.rti_addrs; |
| 1412 | break; |
| 1413 | case cmdpass(RTM_ADD, 2): |
| 1414 | case cmdpass(RTM_CHANGE, 2): |
| 1415 | case cmdpass(RTM_DELETE, 1): |
| 1416 | if (rt == NULL) |
| 1417 | continue; |
| 1418 | info.rti_info[RTAX_NETMASK] = rt_mask(rt); |
| 1419 | info.rti_info[RTAX_DST] = sa = rt_getkey(rt); |
| 1420 | info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; |
| 1421 | memset(&rtm, 0, sizeof(rtm)); |
| 1422 | rtm.rtm_pid = curproc->p_pid; |
| 1423 | rtm.rtm_index = ifp->if_index; |
| 1424 | rtm.rtm_flags |= rt->rt_flags; |
| 1425 | rtm.rtm_errno = error; |
| 1426 | m = COMPATNAME(rt_msg1)(cmd, &info, &rtm, sizeof(rtm)); |
| 1427 | if (m == NULL) |
| 1428 | continue; |
| 1429 | mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; |
| 1430 | break; |
| 1431 | default: |
| 1432 | continue; |
| 1433 | } |
| 1434 | #ifdef DIAGNOSTIC |
| 1435 | if (m == NULL) |
| 1436 | panic("%s: called with wrong command" , __func__); |
| 1437 | #endif |
| 1438 | COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); |
| 1439 | } |
| 1440 | #undef cmdpass |
| 1441 | |
| 1442 | } |
| 1443 | |
| 1444 | static struct mbuf * |
| 1445 | rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, |
| 1446 | struct rt_addrinfo *info) |
| 1447 | { |
| 1448 | struct if_xannouncemsghdr ifan; |
| 1449 | |
| 1450 | memset(info, 0, sizeof(*info)); |
| 1451 | memset(&ifan, 0, sizeof(ifan)); |
| 1452 | ifan.ifan_index = ifp->if_index; |
| 1453 | strlcpy(ifan.ifan_name, ifp->if_xname, sizeof(ifan.ifan_name)); |
| 1454 | ifan.ifan_what = what; |
| 1455 | return COMPATNAME(rt_msg1)(type, info, &ifan, sizeof(ifan)); |
| 1456 | } |
| 1457 | |
| 1458 | /* |
| 1459 | * This is called to generate routing socket messages indicating |
| 1460 | * network interface arrival and departure. |
| 1461 | */ |
| 1462 | void |
| 1463 | COMPATNAME(rt_ifannouncemsg)(struct ifnet *ifp, int what) |
| 1464 | { |
| 1465 | struct mbuf *m; |
| 1466 | struct rt_addrinfo info; |
| 1467 | |
| 1468 | COMPATCALL(rt_ifannouncemsg, (ifp, what)); |
| 1469 | if (COMPATNAME(route_info).ri_cb.any_count == 0) |
| 1470 | return; |
| 1471 | m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); |
| 1472 | if (m == NULL) |
| 1473 | return; |
| 1474 | COMPATNAME(route_enqueue)(m, 0); |
| 1475 | } |
| 1476 | |
| 1477 | /* |
| 1478 | * This is called to generate routing socket messages indicating |
| 1479 | * IEEE80211 wireless events. |
| 1480 | * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. |
| 1481 | */ |
| 1482 | void |
| 1483 | COMPATNAME(rt_ieee80211msg)(struct ifnet *ifp, int what, void *data, |
| 1484 | size_t data_len) |
| 1485 | { |
| 1486 | struct mbuf *m; |
| 1487 | struct rt_addrinfo info; |
| 1488 | |
| 1489 | COMPATCALL(rt_ieee80211msg, (ifp, what, data, data_len)); |
| 1490 | if (COMPATNAME(route_info).ri_cb.any_count == 0) |
| 1491 | return; |
| 1492 | m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); |
| 1493 | if (m == NULL) |
| 1494 | return; |
| 1495 | /* |
| 1496 | * Append the ieee80211 data. Try to stick it in the |
| 1497 | * mbuf containing the ifannounce msg; otherwise allocate |
| 1498 | * a new mbuf and append. |
| 1499 | * |
| 1500 | * NB: we assume m is a single mbuf. |
| 1501 | */ |
| 1502 | if (data_len > M_TRAILINGSPACE(m)) { |
| 1503 | struct mbuf *n = m_get(M_NOWAIT, MT_DATA); |
| 1504 | if (n == NULL) { |
| 1505 | m_freem(m); |
| 1506 | return; |
| 1507 | } |
| 1508 | (void)memcpy(mtod(n, void *), data, data_len); |
| 1509 | n->m_len = data_len; |
| 1510 | m->m_next = n; |
| 1511 | } else if (data_len > 0) { |
| 1512 | (void)memcpy(mtod(m, uint8_t *) + m->m_len, data, data_len); |
| 1513 | m->m_len += data_len; |
| 1514 | } |
| 1515 | if (m->m_flags & M_PKTHDR) |
| 1516 | m->m_pkthdr.len += data_len; |
| 1517 | mtod(m, struct if_xannouncemsghdr *)->ifan_msglen += data_len; |
| 1518 | COMPATNAME(route_enqueue)(m, 0); |
| 1519 | } |
| 1520 | |
| 1521 | /* |
| 1522 | * This is used in dumping the kernel table via sysctl(). |
| 1523 | */ |
| 1524 | static int |
| 1525 | sysctl_dumpentry(struct rtentry *rt, void *v) |
| 1526 | { |
| 1527 | struct rt_walkarg *w = v; |
| 1528 | int error = 0, size; |
| 1529 | struct rt_addrinfo info; |
| 1530 | |
| 1531 | if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) |
| 1532 | return 0; |
| 1533 | memset(&info, 0, sizeof(info)); |
| 1534 | info.rti_info[RTAX_DST] = rt_getkey(rt); |
| 1535 | info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; |
| 1536 | info.rti_info[RTAX_NETMASK] = rt_mask(rt); |
| 1537 | info.rti_info[RTAX_TAG] = rt_gettag(rt); |
| 1538 | if (rt->rt_ifp) { |
| 1539 | const struct ifaddr *rtifa; |
| 1540 | info.rti_info[RTAX_IFP] = rt->rt_ifp->if_dl->ifa_addr; |
| 1541 | /* rtifa used to be simply rt->rt_ifa. If rt->rt_ifa != NULL, |
| 1542 | * then rt_get_ifa() != NULL. So this ought to still be safe. |
| 1543 | * --dyoung |
| 1544 | */ |
| 1545 | rtifa = rt_get_ifa(rt); |
| 1546 | info.rti_info[RTAX_IFA] = rtifa->ifa_addr; |
| 1547 | if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) |
| 1548 | info.rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; |
| 1549 | } |
| 1550 | if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) |
| 1551 | return error; |
| 1552 | if (w->w_where && w->w_tmem && w->w_needed <= 0) { |
| 1553 | struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)w->w_tmem; |
| 1554 | |
| 1555 | rtm->rtm_flags = rt->rt_flags; |
| 1556 | rtm->rtm_use = rt->rt_use; |
| 1557 | rtm_setmetrics(rt, rtm); |
| 1558 | KASSERT(rt->rt_ifp != NULL); |
| 1559 | rtm->rtm_index = rt->rt_ifp->if_index; |
| 1560 | rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; |
| 1561 | rtm->rtm_addrs = info.rti_addrs; |
| 1562 | if ((error = copyout(rtm, w->w_where, size)) != 0) |
| 1563 | w->w_where = NULL; |
| 1564 | else |
| 1565 | w->w_where = (char *)w->w_where + size; |
| 1566 | } |
| 1567 | return error; |
| 1568 | } |
| 1569 | |
| 1570 | static int |
| 1571 | sysctl_iflist_if(struct ifnet *ifp, struct rt_walkarg *w, |
| 1572 | struct rt_addrinfo *info, size_t len) |
| 1573 | { |
| 1574 | struct if_xmsghdr *ifm; |
| 1575 | int error; |
| 1576 | |
| 1577 | ifm = (struct if_xmsghdr *)w->w_tmem; |
| 1578 | ifm->ifm_index = ifp->if_index; |
| 1579 | ifm->ifm_flags = ifp->if_flags; |
| 1580 | ifm->ifm_data = ifp->if_data; |
| 1581 | ifm->ifm_addrs = info->rti_addrs; |
| 1582 | if ((error = copyout(ifm, w->w_where, len)) == 0) |
| 1583 | w->w_where = (char *)w->w_where + len; |
| 1584 | return error; |
| 1585 | } |
| 1586 | |
| 1587 | static int |
| 1588 | sysctl_iflist_addr(struct rt_walkarg *w, struct ifaddr *ifa, |
| 1589 | struct rt_addrinfo *info) |
| 1590 | { |
| 1591 | int len, error; |
| 1592 | |
| 1593 | if ((error = rt_msg2(RTM_XNEWADDR, info, 0, w, &len))) |
| 1594 | return error; |
| 1595 | if (w->w_where && w->w_tmem && w->w_needed <= 0) { |
| 1596 | struct ifa_xmsghdr *ifam; |
| 1597 | |
| 1598 | ifam = (struct ifa_xmsghdr *)w->w_tmem; |
| 1599 | ifam->ifam_index = ifa->ifa_ifp->if_index; |
| 1600 | ifam->ifam_flags = ifa->ifa_flags; |
| 1601 | ifam->ifam_metric = ifa->ifa_metric; |
| 1602 | ifam->ifam_addrs = info->rti_addrs; |
| 1603 | #ifndef COMPAT_RTSOCK |
| 1604 | ifam->ifam_pid = 0; |
| 1605 | ifam->ifam_addrflags = if_addrflags(ifa); |
| 1606 | #endif |
| 1607 | if ((error = copyout(w->w_tmem, w->w_where, len)) == 0) |
| 1608 | w->w_where = (char *)w->w_where + len; |
| 1609 | } |
| 1610 | return error; |
| 1611 | } |
| 1612 | |
| 1613 | static int |
| 1614 | sysctl_iflist(int af, struct rt_walkarg *w, int type) |
| 1615 | { |
| 1616 | struct ifnet *ifp; |
| 1617 | struct ifaddr *ifa; |
| 1618 | struct rt_addrinfo info; |
| 1619 | int cmd, len, error = 0; |
| 1620 | int (*iflist_if)(struct ifnet *, struct rt_walkarg *, |
| 1621 | struct rt_addrinfo *, size_t); |
| 1622 | int (*iflist_addr)(struct rt_walkarg *, struct ifaddr *, |
| 1623 | struct rt_addrinfo *); |
| 1624 | int s; |
| 1625 | struct psref psref; |
| 1626 | int bound = curlwp_bind(); |
| 1627 | |
| 1628 | switch (type) { |
| 1629 | case NET_RT_IFLIST: |
| 1630 | cmd = RTM_IFINFO; |
| 1631 | iflist_if = sysctl_iflist_if; |
| 1632 | iflist_addr = sysctl_iflist_addr; |
| 1633 | break; |
| 1634 | #ifdef COMPAT_14 |
| 1635 | case NET_RT_OOOIFLIST: |
| 1636 | cmd = RTM_OOIFINFO; |
| 1637 | iflist_if = compat_14_iflist; |
| 1638 | iflist_addr = compat_70_iflist_addr; |
| 1639 | break; |
| 1640 | #endif |
| 1641 | #ifdef COMPAT_50 |
| 1642 | case NET_RT_OOIFLIST: |
| 1643 | cmd = RTM_OIFINFO; |
| 1644 | iflist_if = compat_50_iflist; |
| 1645 | iflist_addr = compat_70_iflist_addr; |
| 1646 | break; |
| 1647 | #endif |
| 1648 | #ifdef COMPAT_70 |
| 1649 | case NET_RT_OIFLIST: |
| 1650 | cmd = RTM_IFINFO; |
| 1651 | iflist_if = sysctl_iflist_if; |
| 1652 | iflist_addr = compat_70_iflist_addr; |
| 1653 | break; |
| 1654 | #endif |
| 1655 | default: |
| 1656 | #ifdef DIAGNOSTIC |
| 1657 | printf("sysctl_iflist\n" ); |
| 1658 | #endif |
| 1659 | return EINVAL; |
| 1660 | } |
| 1661 | |
| 1662 | memset(&info, 0, sizeof(info)); |
| 1663 | |
| 1664 | s = pserialize_read_enter(); |
| 1665 | IFNET_READER_FOREACH(ifp) { |
| 1666 | if (w->w_arg && w->w_arg != ifp->if_index) |
| 1667 | continue; |
| 1668 | if (IFADDR_READER_EMPTY(ifp)) |
| 1669 | continue; |
| 1670 | |
| 1671 | psref_acquire(&psref, &ifp->if_psref, ifnet_psref_class); |
| 1672 | pserialize_read_exit(s); |
| 1673 | |
| 1674 | info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; |
| 1675 | if ((error = rt_msg2(cmd, &info, NULL, w, &len)) != 0) |
| 1676 | goto release_exit; |
| 1677 | info.rti_info[RTAX_IFP] = NULL; |
| 1678 | if (w->w_where && w->w_tmem && w->w_needed <= 0) { |
| 1679 | if ((error = iflist_if(ifp, w, &info, len)) != 0) |
| 1680 | goto release_exit; |
| 1681 | } |
| 1682 | IFADDR_READER_FOREACH(ifa, ifp) { |
| 1683 | if (af && af != ifa->ifa_addr->sa_family) |
| 1684 | continue; |
| 1685 | info.rti_info[RTAX_IFA] = ifa->ifa_addr; |
| 1686 | info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; |
| 1687 | info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; |
| 1688 | if ((error = iflist_addr(w, ifa, &info)) != 0) |
| 1689 | goto release_exit; |
| 1690 | } |
| 1691 | info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] = |
| 1692 | info.rti_info[RTAX_BRD] = NULL; |
| 1693 | |
| 1694 | s = pserialize_read_enter(); |
| 1695 | psref_release(&psref, &ifp->if_psref, ifnet_psref_class); |
| 1696 | } |
| 1697 | pserialize_read_exit(s); |
| 1698 | curlwp_bindx(bound); |
| 1699 | |
| 1700 | return 0; |
| 1701 | |
| 1702 | release_exit: |
| 1703 | psref_release(&psref, &ifp->if_psref, ifnet_psref_class); |
| 1704 | curlwp_bindx(bound); |
| 1705 | return error; |
| 1706 | } |
| 1707 | |
| 1708 | static int |
| 1709 | sysctl_rtable(SYSCTLFN_ARGS) |
| 1710 | { |
| 1711 | void *where = oldp; |
| 1712 | size_t *given = oldlenp; |
| 1713 | int i, s, error = EINVAL; |
| 1714 | u_char af; |
| 1715 | struct rt_walkarg w; |
| 1716 | |
| 1717 | if (namelen == 1 && name[0] == CTL_QUERY) |
| 1718 | return sysctl_query(SYSCTLFN_CALL(rnode)); |
| 1719 | |
| 1720 | if (newp) |
| 1721 | return EPERM; |
| 1722 | if (namelen != 3) |
| 1723 | return EINVAL; |
| 1724 | af = name[0]; |
| 1725 | w.w_tmemneeded = 0; |
| 1726 | w.w_tmemsize = 0; |
| 1727 | w.w_tmem = NULL; |
| 1728 | again: |
| 1729 | /* we may return here if a later [re]alloc of the t_mem buffer fails */ |
| 1730 | if (w.w_tmemneeded) { |
| 1731 | w.w_tmem = malloc(w.w_tmemneeded, M_RTABLE, M_WAITOK); |
| 1732 | w.w_tmemsize = w.w_tmemneeded; |
| 1733 | w.w_tmemneeded = 0; |
| 1734 | } |
| 1735 | w.w_op = name[1]; |
| 1736 | w.w_arg = name[2]; |
| 1737 | w.w_given = *given; |
| 1738 | w.w_needed = 0 - w.w_given; |
| 1739 | w.w_where = where; |
| 1740 | |
| 1741 | s = splsoftnet(); |
| 1742 | switch (w.w_op) { |
| 1743 | |
| 1744 | case NET_RT_DUMP: |
| 1745 | case NET_RT_FLAGS: |
| 1746 | #ifdef INET |
| 1747 | /* |
| 1748 | * take care of llinfo entries, the caller must |
| 1749 | * specify an AF |
| 1750 | */ |
| 1751 | if (w.w_op == NET_RT_FLAGS && |
| 1752 | (w.w_arg == 0 || w.w_arg & RTF_LLDATA)) { |
| 1753 | if (af != 0) |
| 1754 | error = lltable_sysctl_dumparp(af, &w); |
| 1755 | else |
| 1756 | error = EINVAL; |
| 1757 | break; |
| 1758 | } |
| 1759 | #endif /* INET */ |
| 1760 | |
| 1761 | for (i = 1; i <= AF_MAX; i++) |
| 1762 | if ((af == 0 || af == i) && |
| 1763 | (error = rt_walktree(i, sysctl_dumpentry, &w))) |
| 1764 | break; |
| 1765 | break; |
| 1766 | |
| 1767 | #ifdef COMPAT_14 |
| 1768 | case NET_RT_OOOIFLIST: |
| 1769 | error = sysctl_iflist(af, &w, w.w_op); |
| 1770 | break; |
| 1771 | #endif |
| 1772 | #ifdef COMPAT_50 |
| 1773 | case NET_RT_OOIFLIST: |
| 1774 | error = sysctl_iflist(af, &w, w.w_op); |
| 1775 | break; |
| 1776 | #endif |
| 1777 | #ifdef COMPAT_70 |
| 1778 | case NET_RT_OIFLIST: |
| 1779 | error = sysctl_iflist(af, &w, w.w_op); |
| 1780 | break; |
| 1781 | #endif |
| 1782 | case NET_RT_IFLIST: |
| 1783 | error = sysctl_iflist(af, &w, w.w_op); |
| 1784 | break; |
| 1785 | } |
| 1786 | splx(s); |
| 1787 | |
| 1788 | /* check to see if we couldn't allocate memory with NOWAIT */ |
| 1789 | if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) |
| 1790 | goto again; |
| 1791 | |
| 1792 | if (w.w_tmem) |
| 1793 | free(w.w_tmem, M_RTABLE); |
| 1794 | w.w_needed += w.w_given; |
| 1795 | if (where) { |
| 1796 | *given = (char *)w.w_where - (char *)where; |
| 1797 | if (*given < w.w_needed) |
| 1798 | return ENOMEM; |
| 1799 | } else { |
| 1800 | *given = (11 * w.w_needed) / 10; |
| 1801 | } |
| 1802 | return error; |
| 1803 | } |
| 1804 | |
| 1805 | /* |
| 1806 | * Routing message software interrupt routine |
| 1807 | */ |
| 1808 | static void |
| 1809 | COMPATNAME(route_intr)(void *cookie) |
| 1810 | { |
| 1811 | struct sockproto proto = { .sp_family = PF_XROUTE, }; |
| 1812 | struct route_info * const ri = &COMPATNAME(route_info); |
| 1813 | struct mbuf *m; |
| 1814 | |
| 1815 | mutex_enter(softnet_lock); |
| 1816 | KERNEL_LOCK(1, NULL); |
| 1817 | for (;;) { |
| 1818 | IFQ_LOCK(&ri->ri_intrq); |
| 1819 | IF_DEQUEUE(&ri->ri_intrq, m); |
| 1820 | IFQ_UNLOCK(&ri->ri_intrq); |
| 1821 | if (m == NULL) |
| 1822 | break; |
| 1823 | proto.sp_protocol = M_GETCTX(m, uintptr_t); |
| 1824 | raw_input(m, &proto, &ri->ri_src, &ri->ri_dst); |
| 1825 | } |
| 1826 | KERNEL_UNLOCK_ONE(NULL); |
| 1827 | mutex_exit(softnet_lock); |
| 1828 | } |
| 1829 | |
| 1830 | /* |
| 1831 | * Enqueue a message to the software interrupt routine. |
| 1832 | */ |
| 1833 | void |
| 1834 | COMPATNAME(route_enqueue)(struct mbuf *m, int family) |
| 1835 | { |
| 1836 | struct route_info * const ri = &COMPATNAME(route_info); |
| 1837 | int wasempty; |
| 1838 | |
| 1839 | IFQ_LOCK(&ri->ri_intrq); |
| 1840 | if (IF_QFULL(&ri->ri_intrq)) { |
| 1841 | IF_DROP(&ri->ri_intrq); |
| 1842 | IFQ_UNLOCK(&ri->ri_intrq); |
| 1843 | m_freem(m); |
| 1844 | } else { |
| 1845 | wasempty = IF_IS_EMPTY(&ri->ri_intrq); |
| 1846 | M_SETCTX(m, (uintptr_t)family); |
| 1847 | IF_ENQUEUE(&ri->ri_intrq, m); |
| 1848 | IFQ_UNLOCK(&ri->ri_intrq); |
| 1849 | if (wasempty) { |
| 1850 | kpreempt_disable(); |
| 1851 | softint_schedule(ri->ri_sih); |
| 1852 | kpreempt_enable(); |
| 1853 | } |
| 1854 | } |
| 1855 | } |
| 1856 | |
| 1857 | static void |
| 1858 | COMPATNAME(route_init)(void) |
| 1859 | { |
| 1860 | struct route_info * const ri = &COMPATNAME(route_info); |
| 1861 | |
| 1862 | #ifndef COMPAT_RTSOCK |
| 1863 | rt_init(); |
| 1864 | #endif |
| 1865 | |
| 1866 | sysctl_net_route_setup(NULL); |
| 1867 | ri->ri_intrq.ifq_maxlen = ri->ri_maxqlen; |
| 1868 | ri->ri_sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, |
| 1869 | COMPATNAME(route_intr), NULL); |
| 1870 | IFQ_LOCK_INIT(&ri->ri_intrq); |
| 1871 | } |
| 1872 | |
| 1873 | /* |
| 1874 | * Definitions of protocols supported in the ROUTE domain. |
| 1875 | */ |
| 1876 | #ifndef COMPAT_RTSOCK |
| 1877 | PR_WRAP_USRREQS(route); |
| 1878 | #else |
| 1879 | PR_WRAP_USRREQS(compat_50_route); |
| 1880 | #endif |
| 1881 | |
| 1882 | static const struct pr_usrreqs route_usrreqs = { |
| 1883 | .pr_attach = COMPATNAME(route_attach_wrapper), |
| 1884 | .pr_detach = COMPATNAME(route_detach_wrapper), |
| 1885 | .pr_accept = COMPATNAME(route_accept_wrapper), |
| 1886 | .pr_bind = COMPATNAME(route_bind_wrapper), |
| 1887 | .pr_listen = COMPATNAME(route_listen_wrapper), |
| 1888 | .pr_connect = COMPATNAME(route_connect_wrapper), |
| 1889 | .pr_connect2 = COMPATNAME(route_connect2_wrapper), |
| 1890 | .pr_disconnect = COMPATNAME(route_disconnect_wrapper), |
| 1891 | .pr_shutdown = COMPATNAME(route_shutdown_wrapper), |
| 1892 | .pr_abort = COMPATNAME(route_abort_wrapper), |
| 1893 | .pr_ioctl = COMPATNAME(route_ioctl_wrapper), |
| 1894 | .pr_stat = COMPATNAME(route_stat_wrapper), |
| 1895 | .pr_peeraddr = COMPATNAME(route_peeraddr_wrapper), |
| 1896 | .pr_sockaddr = COMPATNAME(route_sockaddr_wrapper), |
| 1897 | .pr_rcvd = COMPATNAME(route_rcvd_wrapper), |
| 1898 | .pr_recvoob = COMPATNAME(route_recvoob_wrapper), |
| 1899 | .pr_send = COMPATNAME(route_send_wrapper), |
| 1900 | .pr_sendoob = COMPATNAME(route_sendoob_wrapper), |
| 1901 | .pr_purgeif = COMPATNAME(route_purgeif_wrapper), |
| 1902 | }; |
| 1903 | |
| 1904 | static const struct protosw COMPATNAME(route_protosw)[] = { |
| 1905 | { |
| 1906 | .pr_type = SOCK_RAW, |
| 1907 | .pr_domain = &COMPATNAME(routedomain), |
| 1908 | .pr_flags = PR_ATOMIC|PR_ADDR, |
| 1909 | .pr_input = raw_input, |
| 1910 | .pr_ctlinput = raw_ctlinput, |
| 1911 | .pr_usrreqs = &route_usrreqs, |
| 1912 | .pr_init = raw_init, |
| 1913 | }, |
| 1914 | }; |
| 1915 | |
| 1916 | struct domain COMPATNAME(routedomain) = { |
| 1917 | .dom_family = PF_XROUTE, |
| 1918 | .dom_name = DOMAINNAME, |
| 1919 | .dom_init = COMPATNAME(route_init), |
| 1920 | .dom_protosw = COMPATNAME(route_protosw), |
| 1921 | .dom_protoswNPROTOSW = |
| 1922 | &COMPATNAME(route_protosw)[__arraycount(COMPATNAME(route_protosw))], |
| 1923 | }; |
| 1924 | |
| 1925 | static void |
| 1926 | sysctl_net_route_setup(struct sysctllog **clog) |
| 1927 | { |
| 1928 | const struct sysctlnode *rnode = NULL; |
| 1929 | |
| 1930 | sysctl_createv(clog, 0, NULL, &rnode, |
| 1931 | CTLFLAG_PERMANENT, |
| 1932 | CTLTYPE_NODE, DOMAINNAME, |
| 1933 | SYSCTL_DESCR("PF_ROUTE information" ), |
| 1934 | NULL, 0, NULL, 0, |
| 1935 | CTL_NET, PF_XROUTE, CTL_EOL); |
| 1936 | |
| 1937 | sysctl_createv(clog, 0, NULL, NULL, |
| 1938 | CTLFLAG_PERMANENT, |
| 1939 | CTLTYPE_NODE, "rtable" , |
| 1940 | SYSCTL_DESCR("Routing table information" ), |
| 1941 | sysctl_rtable, 0, NULL, 0, |
| 1942 | CTL_NET, PF_XROUTE, 0 /* any protocol */, CTL_EOL); |
| 1943 | |
| 1944 | sysctl_createv(clog, 0, &rnode, NULL, |
| 1945 | CTLFLAG_PERMANENT, |
| 1946 | CTLTYPE_STRUCT, "stats" , |
| 1947 | SYSCTL_DESCR("Routing statistics" ), |
| 1948 | NULL, 0, &rtstat, sizeof(rtstat), |
| 1949 | CTL_CREATE, CTL_EOL); |
| 1950 | } |
| 1951 | |