rtsock.c revision 1.139
1 /* $NetBSD: rtsock.c,v 1.139 2011/12/31 20:41:58 christos 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 1.139 2011/12/31 20:41:58 christos Exp $"); 65 66 #ifdef _KERNEL_OPT 67 #include "opt_inet.h" 68 #include "opt_mpls.h" 69 #include "opt_compat_netbsd.h" 70 #endif 71 72 #include <sys/param.h> 73 #include <sys/systm.h> 74 #include <sys/proc.h> 75 #include <sys/mbuf.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/intr.h> 83 #ifdef RTSOCK_DEBUG 84 #include <netinet/in.h> 85 #endif /* RTSOCK_DEBUG */ 86 87 #include <net/if.h> 88 #include <net/route.h> 89 #include <net/raw_cb.h> 90 91 #include <netmpls/mpls.h> 92 93 #if defined(COMPAT_14) || defined(COMPAT_50) 94 #include <compat/net/if.h> 95 #include <compat/net/route.h> 96 #endif 97 #ifdef COMPAT_RTSOCK 98 #define RTM_XVERSION RTM_OVERSION 99 #define RT_XADVANCE(a,b) RT_OADVANCE(a,b) 100 #define RT_XROUNDUP(n) RT_OROUNDUP(n) 101 #define PF_XROUTE PF_OROUTE 102 #define rt_xmsghdr rt_msghdr50 103 #define if_xmsghdr if_msghdr /* if_msghdr50 is for RTM_OIFINFO */ 104 #define ifa_xmsghdr ifa_msghdr50 105 #define if_xannouncemsghdr if_announcemsghdr50 106 #define COMPATNAME(x) compat_50_ ## x 107 #define DOMAINNAME "oroute" 108 CTASSERT(sizeof(struct ifa_xmsghdr) == 20); 109 DOMAIN_DEFINE(compat_50_routedomain); /* forward declare and add to link set */ 110 #else 111 #define RTM_XVERSION RTM_VERSION 112 #define RT_XADVANCE(a,b) RT_ADVANCE(a,b) 113 #define RT_XROUNDUP(n) RT_ROUNDUP(n) 114 #define PF_XROUTE PF_ROUTE 115 #define rt_xmsghdr rt_msghdr 116 #define if_xmsghdr if_msghdr 117 #define ifa_xmsghdr ifa_msghdr 118 #define if_xannouncemsghdr if_announcemsghdr 119 #define COMPATNAME(x) x 120 #define DOMAINNAME "route" 121 CTASSERT(sizeof(struct ifa_xmsghdr) == 24); 122 #ifdef COMPAT_50 123 #define COMPATCALL(name, args) compat_50_ ## name args 124 #endif 125 DOMAIN_DEFINE(routedomain); /* forward declare and add to link set */ 126 #undef COMPAT_50 127 #undef COMPAT_14 128 #endif 129 130 #ifndef COMPATCALL 131 #define COMPATCALL(name, args) do { } while (/*CONSTCOND*/ 0) 132 #endif 133 134 struct route_info COMPATNAME(route_info) = { 135 .ri_dst = { .sa_len = 2, .sa_family = PF_XROUTE, }, 136 .ri_src = { .sa_len = 2, .sa_family = PF_XROUTE, }, 137 .ri_maxqlen = IFQ_MAXLEN, 138 }; 139 140 #define PRESERVED_RTF (RTF_UP | RTF_GATEWAY | RTF_HOST | RTF_DONE | RTF_MASK) 141 142 static void COMPATNAME(route_init)(void); 143 static int COMPATNAME(route_output)(struct mbuf *, ...); 144 static int COMPATNAME(route_usrreq)(struct socket *, 145 int, struct mbuf *, struct mbuf *, struct mbuf *, struct lwp *); 146 147 static int rt_msg2(int, struct rt_addrinfo *, void *, struct rt_walkarg *, int *); 148 static int rt_xaddrs(u_char, const char *, const char *, struct rt_addrinfo *); 149 static struct mbuf *rt_makeifannouncemsg(struct ifnet *, int, int, 150 struct rt_addrinfo *); 151 static void rt_setmetrics(int, const struct rt_xmsghdr *, struct rtentry *); 152 static void rtm_setmetrics(const struct rtentry *, struct rt_xmsghdr *); 153 static void sysctl_net_route_setup(struct sysctllog **); 154 static int sysctl_dumpentry(struct rtentry *, void *); 155 static int sysctl_iflist(int, struct rt_walkarg *, int); 156 static int sysctl_rtable(SYSCTLFN_PROTO); 157 static void rt_adjustcount(int, int); 158 159 static void 160 rt_adjustcount(int af, int cnt) 161 { 162 struct route_cb * const cb = &COMPATNAME(route_info).ri_cb; 163 164 cb->any_count += cnt; 165 166 switch (af) { 167 case AF_INET: 168 cb->ip_count += cnt; 169 return; 170 #ifdef INET6 171 case AF_INET6: 172 cb->ip6_count += cnt; 173 return; 174 #endif 175 case AF_ISO: 176 cb->iso_count += cnt; 177 return; 178 case AF_MPLS: 179 cb->mpls_count += cnt; 180 return; 181 } 182 } 183 184 /*ARGSUSED*/ 185 int 186 COMPATNAME(route_usrreq)(struct socket *so, int req, struct mbuf *m, struct mbuf *nam, 187 struct mbuf *control, struct lwp *l) 188 { 189 int error = 0; 190 struct rawcb *rp = sotorawcb(so); 191 int s; 192 193 if (req == PRU_ATTACH) { 194 sosetlock(so); 195 rp = malloc(sizeof(*rp), M_PCB, M_WAITOK|M_ZERO); 196 so->so_pcb = rp; 197 } 198 if (req == PRU_DETACH && rp) 199 rt_adjustcount(rp->rcb_proto.sp_protocol, -1); 200 s = splsoftnet(); 201 202 /* 203 * Don't call raw_usrreq() in the attach case, because 204 * we want to allow non-privileged processes to listen on 205 * and send "safe" commands to the routing socket. 206 */ 207 if (req == PRU_ATTACH) { 208 if (l == NULL) 209 error = EACCES; 210 else 211 error = raw_attach(so, (int)(long)nam); 212 } else 213 error = raw_usrreq(so, req, m, nam, control, l); 214 215 rp = sotorawcb(so); 216 if (req == PRU_ATTACH && rp) { 217 if (error) { 218 free(rp, M_PCB); 219 splx(s); 220 return error; 221 } 222 rt_adjustcount(rp->rcb_proto.sp_protocol, 1); 223 rp->rcb_laddr = &COMPATNAME(route_info).ri_src; 224 rp->rcb_faddr = &COMPATNAME(route_info).ri_dst; 225 soisconnected(so); 226 so->so_options |= SO_USELOOPBACK; 227 } 228 splx(s); 229 return error; 230 } 231 232 /*ARGSUSED*/ 233 int 234 COMPATNAME(route_output)(struct mbuf *m, ...) 235 { 236 struct sockproto proto = { .sp_family = PF_XROUTE, }; 237 struct rt_xmsghdr *rtm = NULL; 238 struct rt_xmsghdr *old_rtm = NULL; 239 struct rtentry *rt = NULL; 240 struct rtentry *saved_nrt = NULL; 241 struct rt_addrinfo info; 242 int len, error = 0; 243 struct ifnet *ifp = NULL; 244 struct ifaddr *ifa = NULL; 245 struct socket *so; 246 va_list ap; 247 sa_family_t family; 248 249 va_start(ap, m); 250 so = va_arg(ap, struct socket *); 251 va_end(ap); 252 253 #define senderr(e) do { error = e; goto flush;} while (/*CONSTCOND*/ 0) 254 if (m == NULL || ((m->m_len < sizeof(int32_t)) && 255 (m = m_pullup(m, sizeof(int32_t))) == NULL)) 256 return ENOBUFS; 257 if ((m->m_flags & M_PKTHDR) == 0) 258 panic("%s", __func__); 259 len = m->m_pkthdr.len; 260 if (len < sizeof(*rtm) || 261 len != mtod(m, struct rt_xmsghdr *)->rtm_msglen) { 262 info.rti_info[RTAX_DST] = NULL; 263 senderr(EINVAL); 264 } 265 R_Malloc(rtm, struct rt_xmsghdr *, len); 266 if (rtm == NULL) { 267 info.rti_info[RTAX_DST] = NULL; 268 senderr(ENOBUFS); 269 } 270 m_copydata(m, 0, len, rtm); 271 if (rtm->rtm_version != RTM_XVERSION) { 272 info.rti_info[RTAX_DST] = NULL; 273 senderr(EPROTONOSUPPORT); 274 } 275 rtm->rtm_pid = curproc->p_pid; 276 memset(&info, 0, sizeof(info)); 277 info.rti_addrs = rtm->rtm_addrs; 278 if (rt_xaddrs(rtm->rtm_type, (const char *)(rtm + 1), len + (char *)rtm, 279 &info)) { 280 senderr(EINVAL); 281 } 282 info.rti_flags = rtm->rtm_flags; 283 #ifdef RTSOCK_DEBUG 284 if (info.rti_info[RTAX_DST]->sa_family == AF_INET) { 285 printf("%s: extracted info.rti_info[RTAX_DST] %s\n", __func__, 286 inet_ntoa(((const struct sockaddr_in *) 287 info.rti_info[RTAX_DST])->sin_addr)); 288 } 289 #endif /* RTSOCK_DEBUG */ 290 if (info.rti_info[RTAX_DST] == NULL || 291 (info.rti_info[RTAX_DST]->sa_family >= AF_MAX)) { 292 senderr(EINVAL); 293 } 294 if (info.rti_info[RTAX_GATEWAY] != NULL && 295 (info.rti_info[RTAX_GATEWAY]->sa_family >= AF_MAX)) { 296 senderr(EINVAL); 297 } 298 299 /* 300 * Verify that the caller has the appropriate privilege; RTM_GET 301 * is the only operation the non-superuser is allowed. 302 */ 303 if (kauth_authorize_network(curlwp->l_cred, KAUTH_NETWORK_ROUTE, 304 0, rtm, NULL, NULL) != 0) 305 senderr(EACCES); 306 307 switch (rtm->rtm_type) { 308 309 case RTM_ADD: 310 if (info.rti_info[RTAX_GATEWAY] == NULL) { 311 senderr(EINVAL); 312 } 313 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 314 if (error == 0 && saved_nrt) { 315 rt_setmetrics(rtm->rtm_inits, rtm, saved_nrt); 316 saved_nrt->rt_refcnt--; 317 } 318 break; 319 320 case RTM_DELETE: 321 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 322 if (error == 0) { 323 (rt = saved_nrt)->rt_refcnt++; 324 goto report; 325 } 326 break; 327 328 case RTM_GET: 329 case RTM_CHANGE: 330 case RTM_LOCK: 331 /* XXX This will mask info.rti_info[RTAX_DST] with 332 * info.rti_info[RTAX_NETMASK] before 333 * searching. It did not used to do that. --dyoung 334 */ 335 error = rtrequest1(RTM_GET, &info, &rt); 336 if (error != 0) 337 senderr(error); 338 if (rtm->rtm_type != RTM_GET) {/* XXX: too grotty */ 339 if (memcmp(info.rti_info[RTAX_DST], rt_getkey(rt), 340 info.rti_info[RTAX_DST]->sa_len) != 0) 341 senderr(ESRCH); 342 if (info.rti_info[RTAX_NETMASK] == NULL && 343 rt_mask(rt) != NULL) 344 senderr(ETOOMANYREFS); 345 } 346 347 switch (rtm->rtm_type) { 348 case RTM_GET: 349 report: 350 info.rti_info[RTAX_DST] = rt_getkey(rt); 351 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 352 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 353 info.rti_info[RTAX_TAG] = rt_gettag(rt); 354 if ((rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) == 0) 355 ; 356 else if ((ifp = rt->rt_ifp) != NULL) { 357 const struct ifaddr *rtifa; 358 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 359 /* rtifa used to be simply rt->rt_ifa. 360 * If rt->rt_ifa != NULL, then 361 * rt_get_ifa() != NULL. So this 362 * ought to still be safe. --dyoung 363 */ 364 rtifa = rt_get_ifa(rt); 365 info.rti_info[RTAX_IFA] = rtifa->ifa_addr; 366 #ifdef RTSOCK_DEBUG 367 if (info.rti_info[RTAX_IFA]->sa_family == 368 AF_INET) { 369 printf("%s: copying out RTAX_IFA %s ", 370 __func__, inet_ntoa( 371 ((const struct sockaddr_in *) 372 info.rti_info[RTAX_IFA])->sin_addr) 373 ); 374 printf("for info.rti_info[RTAX_DST] %s " 375 "ifa_getifa %p ifa_seqno %p\n", 376 inet_ntoa( 377 ((const struct sockaddr_in *) 378 info.rti_info[RTAX_DST])->sin_addr), 379 (void *)rtifa->ifa_getifa, 380 rtifa->ifa_seqno); 381 } 382 #endif /* RTSOCK_DEBUG */ 383 if (ifp->if_flags & IFF_POINTOPOINT) { 384 info.rti_info[RTAX_BRD] = 385 rtifa->ifa_dstaddr; 386 } else 387 info.rti_info[RTAX_BRD] = NULL; 388 rtm->rtm_index = ifp->if_index; 389 } else { 390 info.rti_info[RTAX_IFP] = NULL; 391 info.rti_info[RTAX_IFA] = NULL; 392 } 393 (void)rt_msg2(rtm->rtm_type, &info, NULL, NULL, &len); 394 if (len > rtm->rtm_msglen) { 395 old_rtm = rtm; 396 R_Malloc(rtm, struct rt_xmsghdr *, len); 397 if (rtm == NULL) 398 senderr(ENOBUFS); 399 (void)memcpy(rtm, old_rtm, old_rtm->rtm_msglen); 400 } 401 (void)rt_msg2(rtm->rtm_type, &info, rtm, NULL, 0); 402 rtm->rtm_flags = rt->rt_flags; 403 rtm_setmetrics(rt, rtm); 404 rtm->rtm_addrs = info.rti_addrs; 405 break; 406 407 case RTM_CHANGE: 408 /* 409 * new gateway could require new ifaddr, ifp; 410 * flags may also be different; ifp may be specified 411 * by ll sockaddr when protocol address is ambiguous 412 */ 413 if ((error = rt_getifa(&info)) != 0) 414 senderr(error); 415 if (info.rti_info[RTAX_GATEWAY] && 416 rt_setgate(rt, info.rti_info[RTAX_GATEWAY])) 417 senderr(EDQUOT); 418 if (info.rti_info[RTAX_TAG]) 419 rt_settag(rt, info.rti_info[RTAX_TAG]); 420 /* new gateway could require new ifaddr, ifp; 421 flags may also be different; ifp may be specified 422 by ll sockaddr when protocol address is ambiguous */ 423 if (info.rti_info[RTAX_IFP] && 424 (ifa = ifa_ifwithnet(info.rti_info[RTAX_IFP])) && 425 (ifp = ifa->ifa_ifp) && (info.rti_info[RTAX_IFA] || 426 info.rti_info[RTAX_GATEWAY])) { 427 if (info.rti_info[RTAX_IFA] == NULL || 428 (ifa = ifa_ifwithaddr( 429 info.rti_info[RTAX_IFA])) == NULL) 430 ifa = ifaof_ifpforaddr( 431 info.rti_info[RTAX_IFA] ? 432 info.rti_info[RTAX_IFA] : 433 info.rti_info[RTAX_GATEWAY], ifp); 434 } else if ((info.rti_info[RTAX_IFA] && 435 (ifa = ifa_ifwithaddr(info.rti_info[RTAX_IFA]))) || 436 (info.rti_info[RTAX_GATEWAY] && 437 (ifa = ifa_ifwithroute(rt->rt_flags, 438 rt_getkey(rt), info.rti_info[RTAX_GATEWAY])))) { 439 ifp = ifa->ifa_ifp; 440 } 441 if (ifa) { 442 struct ifaddr *oifa = rt->rt_ifa; 443 if (oifa != ifa) { 444 if (oifa && oifa->ifa_rtrequest) { 445 oifa->ifa_rtrequest(RTM_DELETE, 446 rt, &info); 447 } 448 rt_replace_ifa(rt, ifa); 449 rt->rt_ifp = ifp; 450 } 451 } 452 if (ifp && rt->rt_ifp != ifp) 453 rt->rt_ifp = ifp; 454 rt_setmetrics(rtm->rtm_inits, rtm, rt); 455 if (rt->rt_flags != info.rti_flags) 456 rt->rt_flags = (info.rti_flags & ~PRESERVED_RTF) 457 | (rt->rt_flags & PRESERVED_RTF); 458 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 459 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info); 460 /*FALLTHROUGH*/ 461 case RTM_LOCK: 462 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 463 rt->rt_rmx.rmx_locks |= 464 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 465 break; 466 } 467 break; 468 469 default: 470 senderr(EOPNOTSUPP); 471 } 472 473 flush: 474 if (rtm) { 475 if (error) 476 rtm->rtm_errno = error; 477 else 478 rtm->rtm_flags |= RTF_DONE; 479 } 480 family = info.rti_info[RTAX_DST] ? info.rti_info[RTAX_DST]->sa_family : 481 0; 482 /* We cannot free old_rtm until we have stopped using the 483 * pointers in info, some of which may point to sockaddrs 484 * in old_rtm. 485 */ 486 if (old_rtm != NULL) 487 Free(old_rtm); 488 if (rt) 489 rtfree(rt); 490 { 491 struct rawcb *rp = NULL; 492 /* 493 * Check to see if we don't want our own messages. 494 */ 495 if ((so->so_options & SO_USELOOPBACK) == 0) { 496 if (COMPATNAME(route_info).ri_cb.any_count <= 1) { 497 if (rtm) 498 Free(rtm); 499 m_freem(m); 500 return error; 501 } 502 /* There is another listener, so construct message */ 503 rp = sotorawcb(so); 504 } 505 if (rtm) { 506 m_copyback(m, 0, rtm->rtm_msglen, rtm); 507 if (m->m_pkthdr.len < rtm->rtm_msglen) { 508 m_freem(m); 509 m = NULL; 510 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 511 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 512 Free(rtm); 513 } 514 if (rp) 515 rp->rcb_proto.sp_family = 0; /* Avoid us */ 516 if (family) 517 proto.sp_protocol = family; 518 if (m) 519 raw_input(m, &proto, &COMPATNAME(route_info).ri_src, 520 &COMPATNAME(route_info).ri_dst); 521 if (rp) 522 rp->rcb_proto.sp_family = PF_XROUTE; 523 } 524 return error; 525 } 526 527 static void 528 rt_setmetrics(int which, const struct rt_xmsghdr *in, struct rtentry *out) 529 { 530 #define metric(f, e) if (which & (f)) out->rt_rmx.e = in->rtm_rmx.e; 531 metric(RTV_RPIPE, rmx_recvpipe); 532 metric(RTV_SPIPE, rmx_sendpipe); 533 metric(RTV_SSTHRESH, rmx_ssthresh); 534 metric(RTV_RTT, rmx_rtt); 535 metric(RTV_RTTVAR, rmx_rttvar); 536 metric(RTV_HOPCOUNT, rmx_hopcount); 537 metric(RTV_MTU, rmx_mtu); 538 metric(RTV_EXPIRE, rmx_expire); 539 #undef metric 540 } 541 542 static void 543 rtm_setmetrics(const struct rtentry *in, struct rt_xmsghdr *out) 544 { 545 #define metric(e) out->rtm_rmx.e = in->rt_rmx.e; 546 metric(rmx_recvpipe); 547 metric(rmx_sendpipe); 548 metric(rmx_ssthresh); 549 metric(rmx_rtt); 550 metric(rmx_rttvar); 551 metric(rmx_hopcount); 552 metric(rmx_mtu); 553 metric(rmx_expire); 554 #undef metric 555 } 556 557 static int 558 rt_xaddrs(u_char rtmtype, const char *cp, const char *cplim, 559 struct rt_addrinfo *rtinfo) 560 { 561 const struct sockaddr *sa = NULL; /* Quell compiler warning */ 562 int i; 563 564 for (i = 0; i < RTAX_MAX && cp < cplim; i++) { 565 if ((rtinfo->rti_addrs & (1 << i)) == 0) 566 continue; 567 rtinfo->rti_info[i] = sa = (const struct sockaddr *)cp; 568 RT_XADVANCE(cp, sa); 569 } 570 571 /* 572 * Check for extra addresses specified, except RTM_GET asking 573 * for interface info. 574 */ 575 if (rtmtype == RTM_GET) { 576 if (((rtinfo->rti_addrs & 577 (~((1 << RTAX_IFP) | (1 << RTAX_IFA)))) & (~0 << i)) != 0) 578 return 1; 579 } else if ((rtinfo->rti_addrs & (~0 << i)) != 0) 580 return 1; 581 /* Check for bad data length. */ 582 if (cp != cplim) { 583 if (i == RTAX_NETMASK + 1 && sa != NULL && 584 cp - RT_XROUNDUP(sa->sa_len) + sa->sa_len == cplim) 585 /* 586 * The last sockaddr was info.rti_info[RTAX_NETMASK]. 587 * We accept this for now for the sake of old 588 * binaries or third party softwares. 589 */ 590 ; 591 else 592 return 1; 593 } 594 return 0; 595 } 596 597 static int 598 rt_getlen(int type) 599 { 600 #ifndef COMPAT_RTSOCK 601 CTASSERT(__alignof(struct ifa_msghdr) >= sizeof(uint64_t)); 602 CTASSERT(__alignof(struct if_msghdr) >= sizeof(uint64_t)); 603 CTASSERT(__alignof(struct if_announcemsghdr) >= sizeof(uint64_t)); 604 CTASSERT(__alignof(struct rt_msghdr) >= sizeof(uint64_t)); 605 #endif 606 607 switch (type) { 608 case RTM_DELADDR: 609 case RTM_NEWADDR: 610 case RTM_CHGADDR: 611 return sizeof(struct ifa_xmsghdr); 612 613 case RTM_OOIFINFO: 614 #ifdef COMPAT_14 615 return sizeof(struct if_msghdr14); 616 #else 617 #ifdef DIAGNOSTIC 618 printf("RTM_OOIFINFO\n"); 619 #endif 620 return -1; 621 #endif 622 case RTM_OIFINFO: 623 #ifdef COMPAT_50 624 return sizeof(struct if_msghdr50); 625 #else 626 #ifdef DIAGNOSTIC 627 printf("RTM_OIFINFO\n"); 628 #endif 629 return -1; 630 #endif 631 632 case RTM_IFINFO: 633 return sizeof(struct if_xmsghdr); 634 635 case RTM_IFANNOUNCE: 636 case RTM_IEEE80211: 637 return sizeof(struct if_xannouncemsghdr); 638 639 default: 640 return sizeof(struct rt_xmsghdr); 641 } 642 } 643 644 645 struct mbuf * 646 COMPATNAME(rt_msg1)(int type, struct rt_addrinfo *rtinfo, void *data, int datalen) 647 { 648 struct rt_xmsghdr *rtm; 649 struct mbuf *m; 650 int i; 651 const struct sockaddr *sa; 652 int len, dlen; 653 654 m = m_gethdr(M_DONTWAIT, MT_DATA); 655 if (m == NULL) 656 return m; 657 MCLAIM(m, &COMPATNAME(routedomain).dom_mowner); 658 659 if ((len = rt_getlen(type)) == -1) 660 goto out; 661 if (len > MHLEN + MLEN) 662 panic("%s: message too long", __func__); 663 else if (len > MHLEN) { 664 m->m_next = m_get(M_DONTWAIT, MT_DATA); 665 if (m->m_next == NULL) 666 goto out; 667 MCLAIM(m->m_next, m->m_owner); 668 m->m_pkthdr.len = len; 669 m->m_len = MHLEN; 670 m->m_next->m_len = len - MHLEN; 671 } else { 672 m->m_pkthdr.len = m->m_len = len; 673 } 674 m->m_pkthdr.rcvif = NULL; 675 m_copyback(m, 0, datalen, data); 676 if (len > datalen) 677 (void)memset(mtod(m, char *) + datalen, 0, len - datalen); 678 rtm = mtod(m, struct rt_xmsghdr *); 679 for (i = 0; i < RTAX_MAX; i++) { 680 if ((sa = rtinfo->rti_info[i]) == NULL) 681 continue; 682 rtinfo->rti_addrs |= (1 << i); 683 dlen = RT_XROUNDUP(sa->sa_len); 684 m_copyback(m, len, sa->sa_len, sa); 685 if (dlen != sa->sa_len) { 686 m_copyback(m, len + sa->sa_len, 687 dlen - sa->sa_len, "\0\0\0\0\0\0"); 688 } 689 len += dlen; 690 } 691 if (m->m_pkthdr.len != len) 692 goto out; 693 rtm->rtm_msglen = len; 694 rtm->rtm_version = RTM_XVERSION; 695 rtm->rtm_type = type; 696 return m; 697 out: 698 m_freem(m); 699 return NULL; 700 } 701 702 /* 703 * rt_msg2 704 * 705 * fills 'cp' or 'w'.w_tmem with the routing socket message and 706 * returns the length of the message in 'lenp'. 707 * 708 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 709 * the message 710 * otherwise walkarg's w_needed is updated and if the user buffer is 711 * specified and w_needed indicates space exists the information is copied 712 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 713 * if the allocation fails ENOBUFS is returned. 714 */ 715 static int 716 rt_msg2(int type, struct rt_addrinfo *rtinfo, void *cpv, struct rt_walkarg *w, 717 int *lenp) 718 { 719 int i; 720 int len, dlen, second_time = 0; 721 char *cp0, *cp = cpv; 722 723 rtinfo->rti_addrs = 0; 724 again: 725 if ((len = rt_getlen(type)) == -1) 726 return EINVAL; 727 728 if ((cp0 = cp) != NULL) 729 cp += len; 730 for (i = 0; i < RTAX_MAX; i++) { 731 const struct sockaddr *sa; 732 733 if ((sa = rtinfo->rti_info[i]) == NULL) 734 continue; 735 rtinfo->rti_addrs |= (1 << i); 736 dlen = RT_XROUNDUP(sa->sa_len); 737 if (cp) { 738 (void)memcpy(cp, sa, (size_t)dlen); 739 cp += dlen; 740 } 741 len += dlen; 742 } 743 if (cp == NULL && w != NULL && !second_time) { 744 struct rt_walkarg *rw = w; 745 746 rw->w_needed += len; 747 if (rw->w_needed <= 0 && rw->w_where) { 748 if (rw->w_tmemsize < len) { 749 if (rw->w_tmem) 750 free(rw->w_tmem, M_RTABLE); 751 rw->w_tmem = malloc(len, M_RTABLE, M_NOWAIT); 752 if (rw->w_tmem) 753 rw->w_tmemsize = len; 754 else 755 rw->w_tmemsize = 0; 756 } 757 if (rw->w_tmem) { 758 cp = rw->w_tmem; 759 second_time = 1; 760 goto again; 761 } else { 762 rw->w_tmemneeded = len; 763 return ENOBUFS; 764 } 765 } 766 } 767 if (cp) { 768 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)cp0; 769 770 rtm->rtm_version = RTM_XVERSION; 771 rtm->rtm_type = type; 772 rtm->rtm_msglen = len; 773 } 774 if (lenp) 775 *lenp = len; 776 return 0; 777 } 778 779 /* 780 * This routine is called to generate a message from the routing 781 * socket indicating that a redirect has occurred, a routing lookup 782 * has failed, or that a protocol has detected timeouts to a particular 783 * destination. 784 */ 785 void 786 COMPATNAME(rt_missmsg)(int type, const struct rt_addrinfo *rtinfo, int flags, 787 int error) 788 { 789 struct rt_xmsghdr rtm; 790 struct mbuf *m; 791 const struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 792 struct rt_addrinfo info = *rtinfo; 793 794 COMPATCALL(rt_missmsg, (type, rtinfo, flags, error)); 795 if (COMPATNAME(route_info).ri_cb.any_count == 0) 796 return; 797 memset(&rtm, 0, sizeof(rtm)); 798 rtm.rtm_flags = RTF_DONE | flags; 799 rtm.rtm_errno = error; 800 m = COMPATNAME(rt_msg1)(type, &info, &rtm, sizeof(rtm)); 801 if (m == NULL) 802 return; 803 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 804 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 805 } 806 807 /* 808 * This routine is called to generate a message from the routing 809 * socket indicating that the status of a network interface has changed. 810 */ 811 void 812 COMPATNAME(rt_ifmsg)(struct ifnet *ifp) 813 { 814 struct if_xmsghdr ifm; 815 struct mbuf *m; 816 struct rt_addrinfo info; 817 818 COMPATCALL(rt_ifmsg, (ifp)); 819 if (COMPATNAME(route_info).ri_cb.any_count == 0) 820 return; 821 (void)memset(&info, 0, sizeof(info)); 822 (void)memset(&ifm, 0, sizeof(ifm)); 823 ifm.ifm_index = ifp->if_index; 824 ifm.ifm_flags = ifp->if_flags; 825 ifm.ifm_data = ifp->if_data; 826 ifm.ifm_addrs = 0; 827 m = COMPATNAME(rt_msg1)(RTM_IFINFO, &info, &ifm, sizeof(ifm)); 828 if (m == NULL) 829 return; 830 COMPATNAME(route_enqueue)(m, 0); 831 #ifdef COMPAT_14 832 compat_14_rt_oifmsg(ifp); 833 #endif 834 #ifdef COMPAT_50 835 compat_50_rt_oifmsg(ifp); 836 #endif 837 } 838 839 840 /* 841 * This is called to generate messages from the routing socket 842 * indicating a network interface has had addresses associated with it. 843 * if we ever reverse the logic and replace messages TO the routing 844 * socket indicate a request to configure interfaces, then it will 845 * be unnecessary as the routing socket will automatically generate 846 * copies of it. 847 */ 848 void 849 COMPATNAME(rt_newaddrmsg)(int cmd, struct ifaddr *ifa, int error, 850 struct rtentry *rt) 851 { 852 #define cmdpass(__cmd, __pass) (((__cmd) << 2) | (__pass)) 853 struct rt_addrinfo info; 854 const struct sockaddr *sa; 855 int pass; 856 struct mbuf *m; 857 struct ifnet *ifp; 858 struct rt_xmsghdr rtm; 859 struct ifa_xmsghdr ifam; 860 int ncmd; 861 862 KASSERT(ifa != NULL); 863 ifp = ifa->ifa_ifp; 864 COMPATCALL(rt_newaddrmsg, (cmd, ifa, error, rt)); 865 if (COMPATNAME(route_info).ri_cb.any_count == 0) 866 return; 867 for (pass = 1; pass < 3; pass++) { 868 memset(&info, 0, sizeof(info)); 869 switch (cmdpass(cmd, pass)) { 870 case cmdpass(RTM_ADD, 1): 871 case cmdpass(RTM_CHANGE, 1): 872 case cmdpass(RTM_DELETE, 2): 873 case cmdpass(RTM_NEWADDR, 1): 874 case cmdpass(RTM_DELADDR, 1): 875 case cmdpass(RTM_CHGADDR, 1): 876 switch (cmd) { 877 case RTM_ADD: 878 ncmd = RTM_NEWADDR; 879 break; 880 case RTM_DELETE: 881 ncmd = RTM_DELADDR; 882 break; 883 case RTM_CHANGE: 884 ncmd = RTM_CHGADDR; 885 break; 886 default: 887 ncmd = cmd; 888 } 889 info.rti_info[RTAX_IFA] = sa = ifa->ifa_addr; 890 KASSERT(ifp->if_dl != NULL); 891 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 892 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 893 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 894 memset(&ifam, 0, sizeof(ifam)); 895 ifam.ifam_index = ifp->if_index; 896 ifam.ifam_metric = ifa->ifa_metric; 897 ifam.ifam_flags = ifa->ifa_flags; 898 m = COMPATNAME(rt_msg1)(ncmd, &info, &ifam, sizeof(ifam)); 899 if (m == NULL) 900 continue; 901 mtod(m, struct ifa_xmsghdr *)->ifam_addrs = 902 info.rti_addrs; 903 break; 904 case cmdpass(RTM_ADD, 2): 905 case cmdpass(RTM_CHANGE, 2): 906 case cmdpass(RTM_DELETE, 1): 907 if (rt == NULL) 908 continue; 909 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 910 info.rti_info[RTAX_DST] = sa = rt_getkey(rt); 911 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 912 memset(&rtm, 0, sizeof(rtm)); 913 rtm.rtm_index = ifp->if_index; 914 rtm.rtm_flags |= rt->rt_flags; 915 rtm.rtm_errno = error; 916 m = COMPATNAME(rt_msg1)(cmd, &info, &rtm, sizeof(rtm)); 917 if (m == NULL) 918 continue; 919 mtod(m, struct rt_xmsghdr *)->rtm_addrs = info.rti_addrs; 920 break; 921 default: 922 continue; 923 } 924 #ifdef DIAGNOSTIC 925 if (m == NULL) 926 panic("%s: called with wrong command", __func__); 927 #endif 928 COMPATNAME(route_enqueue)(m, sa ? sa->sa_family : 0); 929 } 930 #undef cmdpass 931 } 932 933 static struct mbuf * 934 rt_makeifannouncemsg(struct ifnet *ifp, int type, int what, 935 struct rt_addrinfo *info) 936 { 937 struct if_xannouncemsghdr ifan; 938 939 memset(info, 0, sizeof(*info)); 940 memset(&ifan, 0, sizeof(ifan)); 941 ifan.ifan_index = ifp->if_index; 942 strlcpy(ifan.ifan_name, ifp->if_xname, sizeof(ifan.ifan_name)); 943 ifan.ifan_what = what; 944 return COMPATNAME(rt_msg1)(type, info, &ifan, sizeof(ifan)); 945 } 946 947 /* 948 * This is called to generate routing socket messages indicating 949 * network interface arrival and departure. 950 */ 951 void 952 COMPATNAME(rt_ifannouncemsg)(struct ifnet *ifp, int what) 953 { 954 struct mbuf *m; 955 struct rt_addrinfo info; 956 957 COMPATCALL(rt_ifannouncemsg, (ifp, what)); 958 if (COMPATNAME(route_info).ri_cb.any_count == 0) 959 return; 960 m = rt_makeifannouncemsg(ifp, RTM_IFANNOUNCE, what, &info); 961 if (m == NULL) 962 return; 963 COMPATNAME(route_enqueue)(m, 0); 964 } 965 966 /* 967 * This is called to generate routing socket messages indicating 968 * IEEE80211 wireless events. 969 * XXX we piggyback on the RTM_IFANNOUNCE msg format in a clumsy way. 970 */ 971 void 972 COMPATNAME(rt_ieee80211msg)(struct ifnet *ifp, int what, void *data, 973 size_t data_len) 974 { 975 struct mbuf *m; 976 struct rt_addrinfo info; 977 978 COMPATCALL(rt_ieee80211msg, (ifp, what, data, data_len)); 979 if (COMPATNAME(route_info).ri_cb.any_count == 0) 980 return; 981 m = rt_makeifannouncemsg(ifp, RTM_IEEE80211, what, &info); 982 if (m == NULL) 983 return; 984 /* 985 * Append the ieee80211 data. Try to stick it in the 986 * mbuf containing the ifannounce msg; otherwise allocate 987 * a new mbuf and append. 988 * 989 * NB: we assume m is a single mbuf. 990 */ 991 if (data_len > M_TRAILINGSPACE(m)) { 992 struct mbuf *n = m_get(M_NOWAIT, MT_DATA); 993 if (n == NULL) { 994 m_freem(m); 995 return; 996 } 997 (void)memcpy(mtod(n, void *), data, data_len); 998 n->m_len = data_len; 999 m->m_next = n; 1000 } else if (data_len > 0) { 1001 (void)memcpy(mtod(m, uint8_t *) + m->m_len, data, data_len); 1002 m->m_len += data_len; 1003 } 1004 if (m->m_flags & M_PKTHDR) 1005 m->m_pkthdr.len += data_len; 1006 mtod(m, struct if_xannouncemsghdr *)->ifan_msglen += data_len; 1007 COMPATNAME(route_enqueue)(m, 0); 1008 } 1009 1010 /* 1011 * This is used in dumping the kernel table via sysctl(). 1012 */ 1013 static int 1014 sysctl_dumpentry(struct rtentry *rt, void *v) 1015 { 1016 struct rt_walkarg *w = v; 1017 int error = 0, size; 1018 struct rt_addrinfo info; 1019 1020 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 1021 return 0; 1022 memset(&info, 0, sizeof(info)); 1023 info.rti_info[RTAX_DST] = rt_getkey(rt); 1024 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 1025 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 1026 if (rt->rt_ifp) { 1027 const struct ifaddr *rtifa; 1028 info.rti_info[RTAX_IFP] = rt->rt_ifp->if_dl->ifa_addr; 1029 /* rtifa used to be simply rt->rt_ifa. If rt->rt_ifa != NULL, 1030 * then rt_get_ifa() != NULL. So this ought to still be safe. 1031 * --dyoung 1032 */ 1033 rtifa = rt_get_ifa(rt); 1034 info.rti_info[RTAX_IFA] = rtifa->ifa_addr; 1035 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 1036 info.rti_info[RTAX_BRD] = rtifa->ifa_dstaddr; 1037 } 1038 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 1039 return error; 1040 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1041 struct rt_xmsghdr *rtm = (struct rt_xmsghdr *)w->w_tmem; 1042 1043 rtm->rtm_flags = rt->rt_flags; 1044 rtm->rtm_use = rt->rt_use; 1045 rtm_setmetrics(rt, rtm); 1046 KASSERT(rt->rt_ifp != NULL); 1047 rtm->rtm_index = rt->rt_ifp->if_index; 1048 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 1049 rtm->rtm_addrs = info.rti_addrs; 1050 if ((error = copyout(rtm, w->w_where, size)) != 0) 1051 w->w_where = NULL; 1052 else 1053 w->w_where = (char *)w->w_where + size; 1054 } 1055 return error; 1056 } 1057 1058 static int 1059 sysctl_iflist(int af, struct rt_walkarg *w, int type) 1060 { 1061 struct ifnet *ifp; 1062 struct ifaddr *ifa; 1063 struct rt_addrinfo info; 1064 int len, error = 0; 1065 1066 memset(&info, 0, sizeof(info)); 1067 IFNET_FOREACH(ifp) { 1068 if (w->w_arg && w->w_arg != ifp->if_index) 1069 continue; 1070 if (IFADDR_EMPTY(ifp)) 1071 continue; 1072 info.rti_info[RTAX_IFP] = ifp->if_dl->ifa_addr; 1073 switch (type) { 1074 case NET_RT_IFLIST: 1075 error = rt_msg2(RTM_IFINFO, &info, NULL, w, &len); 1076 break; 1077 #ifdef COMPAT_14 1078 case NET_RT_OOIFLIST: 1079 error = rt_msg2(RTM_OOIFINFO, &info, NULL, w, &len); 1080 break; 1081 #endif 1082 #ifdef COMPAT_50 1083 case NET_RT_OIFLIST: 1084 error = rt_msg2(RTM_OIFINFO, &info, NULL, w, &len); 1085 break; 1086 #endif 1087 default: 1088 panic("sysctl_iflist(1)"); 1089 } 1090 if (error) 1091 return error; 1092 info.rti_info[RTAX_IFP] = NULL; 1093 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1094 switch (type) { 1095 case NET_RT_IFLIST: { 1096 struct if_xmsghdr *ifm; 1097 1098 ifm = (struct if_xmsghdr *)w->w_tmem; 1099 ifm->ifm_index = ifp->if_index; 1100 ifm->ifm_flags = ifp->if_flags; 1101 ifm->ifm_data = ifp->if_data; 1102 ifm->ifm_addrs = info.rti_addrs; 1103 error = copyout(ifm, w->w_where, len); 1104 if (error) 1105 return error; 1106 w->w_where = (char *)w->w_where + len; 1107 break; 1108 } 1109 1110 #ifdef COMPAT_14 1111 case NET_RT_OOIFLIST: 1112 error = compat_14_iflist(ifp, w, &info, len); 1113 if (error) 1114 return error; 1115 break; 1116 #endif 1117 #ifdef COMPAT_50 1118 case NET_RT_OIFLIST: 1119 error = compat_50_iflist(ifp, w, &info, len); 1120 if (error) 1121 return error; 1122 break; 1123 #endif 1124 default: 1125 panic("sysctl_iflist(2)"); 1126 } 1127 } 1128 IFADDR_FOREACH(ifa, ifp) { 1129 if (af && af != ifa->ifa_addr->sa_family) 1130 continue; 1131 info.rti_info[RTAX_IFA] = ifa->ifa_addr; 1132 info.rti_info[RTAX_NETMASK] = ifa->ifa_netmask; 1133 info.rti_info[RTAX_BRD] = ifa->ifa_dstaddr; 1134 if ((error = rt_msg2(RTM_NEWADDR, &info, 0, w, &len))) 1135 return error; 1136 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1137 struct ifa_xmsghdr *ifam; 1138 1139 ifam = (struct ifa_xmsghdr *)w->w_tmem; 1140 ifam->ifam_index = ifa->ifa_ifp->if_index; 1141 ifam->ifam_flags = ifa->ifa_flags; 1142 ifam->ifam_metric = ifa->ifa_metric; 1143 ifam->ifam_addrs = info.rti_addrs; 1144 error = copyout(w->w_tmem, w->w_where, len); 1145 if (error) 1146 return error; 1147 w->w_where = (char *)w->w_where + len; 1148 } 1149 } 1150 info.rti_info[RTAX_IFA] = info.rti_info[RTAX_NETMASK] = 1151 info.rti_info[RTAX_BRD] = NULL; 1152 } 1153 return 0; 1154 } 1155 1156 static int 1157 sysctl_rtable(SYSCTLFN_ARGS) 1158 { 1159 void *where = oldp; 1160 size_t *given = oldlenp; 1161 const void *new = newp; 1162 int i, s, error = EINVAL; 1163 u_char af; 1164 struct rt_walkarg w; 1165 1166 if (namelen == 1 && name[0] == CTL_QUERY) 1167 return sysctl_query(SYSCTLFN_CALL(rnode)); 1168 1169 if (new) 1170 return EPERM; 1171 if (namelen != 3) 1172 return EINVAL; 1173 af = name[0]; 1174 w.w_tmemneeded = 0; 1175 w.w_tmemsize = 0; 1176 w.w_tmem = NULL; 1177 again: 1178 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 1179 if (w.w_tmemneeded) { 1180 w.w_tmem = malloc(w.w_tmemneeded, M_RTABLE, M_WAITOK); 1181 w.w_tmemsize = w.w_tmemneeded; 1182 w.w_tmemneeded = 0; 1183 } 1184 w.w_op = name[1]; 1185 w.w_arg = name[2]; 1186 w.w_given = *given; 1187 w.w_needed = 0 - w.w_given; 1188 w.w_where = where; 1189 1190 s = splsoftnet(); 1191 switch (w.w_op) { 1192 1193 case NET_RT_DUMP: 1194 case NET_RT_FLAGS: 1195 for (i = 1; i <= AF_MAX; i++) 1196 if ((af == 0 || af == i) && 1197 (error = rt_walktree(i, sysctl_dumpentry, &w))) 1198 break; 1199 break; 1200 1201 #ifdef COMPAT_14 1202 case NET_RT_OOIFLIST: 1203 error = sysctl_iflist(af, &w, w.w_op); 1204 break; 1205 #endif 1206 #ifdef COMPAT_50 1207 case NET_RT_OIFLIST: 1208 error = sysctl_iflist(af, &w, w.w_op); 1209 break; 1210 #endif 1211 case NET_RT_IFLIST: 1212 error = sysctl_iflist(af, &w, w.w_op); 1213 break; 1214 } 1215 splx(s); 1216 1217 /* check to see if we couldn't allocate memory with NOWAIT */ 1218 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 1219 goto again; 1220 1221 if (w.w_tmem) 1222 free(w.w_tmem, M_RTABLE); 1223 w.w_needed += w.w_given; 1224 if (where) { 1225 *given = (char *)w.w_where - (char *)where; 1226 if (*given < w.w_needed) 1227 return ENOMEM; 1228 } else { 1229 *given = (11 * w.w_needed) / 10; 1230 } 1231 return error; 1232 } 1233 1234 /* 1235 * Routing message software interrupt routine 1236 */ 1237 static void 1238 COMPATNAME(route_intr)(void *cookie) 1239 { 1240 struct sockproto proto = { .sp_family = PF_XROUTE, }; 1241 struct route_info * const ri = &COMPATNAME(route_info); 1242 struct mbuf *m; 1243 int s; 1244 1245 mutex_enter(softnet_lock); 1246 KERNEL_LOCK(1, NULL); 1247 while (!IF_IS_EMPTY(&ri->ri_intrq)) { 1248 s = splnet(); 1249 IF_DEQUEUE(&ri->ri_intrq, m); 1250 splx(s); 1251 if (m == NULL) 1252 break; 1253 proto.sp_protocol = M_GETCTX(m, uintptr_t); 1254 raw_input(m, &proto, &ri->ri_src, &ri->ri_dst); 1255 } 1256 KERNEL_UNLOCK_ONE(NULL); 1257 mutex_exit(softnet_lock); 1258 } 1259 1260 /* 1261 * Enqueue a message to the software interrupt routine. 1262 */ 1263 void 1264 COMPATNAME(route_enqueue)(struct mbuf *m, int family) 1265 { 1266 struct route_info * const ri = &COMPATNAME(route_info); 1267 int s, wasempty; 1268 1269 s = splnet(); 1270 if (IF_QFULL(&ri->ri_intrq)) { 1271 IF_DROP(&ri->ri_intrq); 1272 m_freem(m); 1273 } else { 1274 wasempty = IF_IS_EMPTY(&ri->ri_intrq); 1275 M_SETCTX(m, (uintptr_t)family); 1276 IF_ENQUEUE(&ri->ri_intrq, m); 1277 if (wasempty) 1278 softint_schedule(ri->ri_sih); 1279 } 1280 splx(s); 1281 } 1282 1283 static void 1284 COMPATNAME(route_init)(void) 1285 { 1286 struct route_info * const ri = &COMPATNAME(route_info); 1287 1288 #ifndef COMPAT_RTSOCK 1289 rt_init(); 1290 #endif 1291 1292 sysctl_net_route_setup(NULL); 1293 ri->ri_intrq.ifq_maxlen = ri->ri_maxqlen; 1294 ri->ri_sih = softint_establish(SOFTINT_NET | SOFTINT_MPSAFE, 1295 COMPATNAME(route_intr), NULL); 1296 } 1297 1298 /* 1299 * Definitions of protocols supported in the ROUTE domain. 1300 */ 1301 #ifndef COMPAT_RTSOCK 1302 PR_WRAP_USRREQ(route_usrreq); 1303 #else 1304 PR_WRAP_USRREQ(compat_50_route_usrreq); 1305 #endif 1306 1307 static const struct protosw COMPATNAME(route_protosw)[] = { 1308 { 1309 .pr_type = SOCK_RAW, 1310 .pr_domain = &COMPATNAME(routedomain), 1311 .pr_flags = PR_ATOMIC|PR_ADDR, 1312 .pr_input = raw_input, 1313 .pr_output = COMPATNAME(route_output), 1314 .pr_ctlinput = raw_ctlinput, 1315 .pr_usrreq = COMPATNAME(route_usrreq_wrapper), 1316 .pr_init = raw_init, 1317 }, 1318 }; 1319 1320 struct domain COMPATNAME(routedomain) = { 1321 .dom_family = PF_XROUTE, 1322 .dom_name = DOMAINNAME, 1323 .dom_init = COMPATNAME(route_init), 1324 .dom_protosw = COMPATNAME(route_protosw), 1325 .dom_protoswNPROTOSW = 1326 &COMPATNAME(route_protosw)[__arraycount(COMPATNAME(route_protosw))], 1327 }; 1328 1329 static void 1330 sysctl_net_route_setup(struct sysctllog **clog) 1331 { 1332 const struct sysctlnode *rnode = NULL; 1333 1334 sysctl_createv(clog, 0, NULL, NULL, 1335 CTLFLAG_PERMANENT, 1336 CTLTYPE_NODE, "net", NULL, 1337 NULL, 0, NULL, 0, 1338 CTL_NET, CTL_EOL); 1339 1340 sysctl_createv(clog, 0, NULL, &rnode, 1341 CTLFLAG_PERMANENT, 1342 CTLTYPE_NODE, DOMAINNAME, 1343 SYSCTL_DESCR("PF_ROUTE information"), 1344 NULL, 0, NULL, 0, 1345 CTL_NET, PF_XROUTE, CTL_EOL); 1346 1347 sysctl_createv(clog, 0, NULL, NULL, 1348 CTLFLAG_PERMANENT, 1349 CTLTYPE_NODE, "rtable", 1350 SYSCTL_DESCR("Routing table information"), 1351 sysctl_rtable, 0, NULL, 0, 1352 CTL_NET, PF_XROUTE, 0 /* any protocol */, CTL_EOL); 1353 1354 sysctl_createv(clog, 0, &rnode, NULL, 1355 CTLFLAG_PERMANENT, 1356 CTLTYPE_STRUCT, "stats", 1357 SYSCTL_DESCR("Routing statistics"), 1358 NULL, 0, &rtstat, sizeof(rtstat), 1359 CTL_CREATE, CTL_EOL); 1360 } 1361
Indexes created Fri Oct 03 02:09:57 GMT 2025