rtsock.c revision 1.40.4.2
1 /* $NetBSD: rtsock.c,v 1.40.4.2 2003/06/25 09:26:12 msaitoh 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. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)rtsock.c 8.7 (Berkeley) 10/12/95 65 */ 66 67 #include "opt_inet.h" 68 69 #include <sys/param.h> 70 #include <sys/systm.h> 71 #include <sys/proc.h> 72 #include <sys/mbuf.h> 73 #include <sys/socket.h> 74 #include <sys/socketvar.h> 75 #include <sys/domain.h> 76 #include <sys/protosw.h> 77 78 #include <vm/vm.h> 79 #include <sys/sysctl.h> 80 81 #include <net/if.h> 82 #include <net/route.h> 83 #include <net/raw_cb.h> 84 85 #include <machine/stdarg.h> 86 87 struct sockaddr route_dst = { 2, PF_ROUTE, }; 88 struct sockaddr route_src = { 2, PF_ROUTE, }; 89 struct sockproto route_proto = { PF_ROUTE, }; 90 91 struct walkarg { 92 int w_op; 93 int w_arg; 94 int w_given; 95 int w_needed; 96 caddr_t w_where; 97 int w_tmemsize; 98 int w_tmemneeded; 99 caddr_t w_tmem; 100 }; 101 102 static struct mbuf *rt_msg1 __P((int, struct rt_addrinfo *, caddr_t, int)); 103 static int rt_msg2 __P((int, struct rt_addrinfo *, caddr_t, struct walkarg *, 104 int *)); 105 static void rt_xaddrs __P((caddr_t, caddr_t, struct rt_addrinfo *)); 106 static int sysctl_dumpentry __P((struct radix_node *, void *)); 107 static int sysctl_iflist __P((int, struct walkarg *, int)); 108 static int sysctl_rtable __P((int *, u_int, void *, size_t *, void *, size_t)); 109 static __inline void rt_adjustcount __P((int, int)); 110 111 /* Sleazy use of local variables throughout file, warning!!!! */ 112 #define dst info.rti_info[RTAX_DST] 113 #define gate info.rti_info[RTAX_GATEWAY] 114 #define netmask info.rti_info[RTAX_NETMASK] 115 #define genmask info.rti_info[RTAX_GENMASK] 116 #define ifpaddr info.rti_info[RTAX_IFP] 117 #define ifaaddr info.rti_info[RTAX_IFA] 118 #define brdaddr info.rti_info[RTAX_BRD] 119 120 static __inline void 121 rt_adjustcount(af, cnt) 122 int af, cnt; 123 { 124 route_cb.any_count += cnt; 125 switch (af) { 126 case AF_INET: 127 route_cb.ip_count += cnt; 128 return; 129 #ifdef INET6 130 case AF_INET6: 131 route_cb.ip6_count += cnt; 132 return; 133 #endif 134 case AF_IPX: 135 route_cb.ipx_count += cnt; 136 return; 137 case AF_NS: 138 route_cb.ns_count += cnt; 139 return; 140 case AF_ISO: 141 route_cb.iso_count += cnt; 142 return; 143 } 144 } 145 146 /*ARGSUSED*/ 147 int 148 route_usrreq(so, req, m, nam, control, p) 149 struct socket *so; 150 int req; 151 struct mbuf *m, *nam, *control; 152 struct proc *p; 153 { 154 int error = 0; 155 struct rawcb *rp = sotorawcb(so); 156 int s; 157 158 if (req == PRU_ATTACH) { 159 MALLOC(rp, struct rawcb *, sizeof(*rp), M_PCB, M_WAITOK); 160 if ((so->so_pcb = rp) != NULL) 161 bzero(so->so_pcb, sizeof(*rp)); 162 163 } 164 if (req == PRU_DETACH && rp) 165 rt_adjustcount(rp->rcb_proto.sp_protocol, -1); 166 s = splsoftnet(); 167 168 /* 169 * Don't call raw_usrreq() in the attach case, because 170 * we want to allow non-privileged processes to listen on 171 * and send "safe" commands to the routing socket. 172 */ 173 if (req == PRU_ATTACH) { 174 if (p == 0) 175 error = EACCES; 176 else 177 error = raw_attach(so, (int)(long)nam); 178 } else 179 error = raw_usrreq(so, req, m, nam, control, p); 180 181 rp = sotorawcb(so); 182 if (req == PRU_ATTACH && rp) { 183 if (error) { 184 free((caddr_t)rp, M_PCB); 185 splx(s); 186 return (error); 187 } 188 rt_adjustcount(rp->rcb_proto.sp_protocol, 1); 189 rp->rcb_laddr = &route_src; 190 rp->rcb_faddr = &route_dst; 191 soisconnected(so); 192 so->so_options |= SO_USELOOPBACK; 193 } 194 splx(s); 195 return (error); 196 } 197 198 /*ARGSUSED*/ 199 int 200 #if __STDC__ 201 route_output(struct mbuf *m, ...) 202 #else 203 route_output(m, va_alist) 204 struct mbuf *m; 205 va_dcl 206 #endif 207 { 208 struct rt_msghdr *rtm = 0; 209 struct radix_node *rn = 0; 210 struct rtentry *rt = 0; 211 struct rtentry *saved_nrt = 0; 212 struct radix_node_head *rnh; 213 struct rt_addrinfo info; 214 int len, error = 0; 215 struct ifnet *ifp = 0; 216 struct ifaddr *ifa = 0; 217 struct socket *so; 218 va_list ap; 219 220 va_start(ap, m); 221 so = va_arg(ap, struct socket *); 222 va_end(ap); 223 224 bzero(&info, sizeof(info)); 225 #define senderr(e) do { error = e; goto flush;} while (0) 226 if (m == 0 || ((m->m_len < sizeof(int32_t)) && 227 (m = m_pullup(m, sizeof(int32_t))) == 0)) 228 return (ENOBUFS); 229 if ((m->m_flags & M_PKTHDR) == 0) 230 panic("route_output"); 231 len = m->m_pkthdr.len; 232 if (len < sizeof(*rtm) || 233 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 234 dst = 0; 235 senderr(EINVAL); 236 } 237 R_Malloc(rtm, struct rt_msghdr *, len); 238 if (rtm == 0) { 239 dst = 0; 240 senderr(ENOBUFS); 241 } 242 m_copydata(m, 0, len, (caddr_t)rtm); 243 if (rtm->rtm_version != RTM_VERSION) { 244 dst = 0; 245 senderr(EPROTONOSUPPORT); 246 } 247 rtm->rtm_pid = curproc->p_pid; 248 info.rti_addrs = rtm->rtm_addrs; 249 rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info); 250 if (dst == 0 || (dst->sa_family >= AF_MAX)) 251 senderr(EINVAL); 252 if (gate != 0 && (gate->sa_family >= AF_MAX)) 253 senderr(EINVAL); 254 if (genmask) { 255 struct radix_node *t; 256 t = rn_addmask((caddr_t)genmask, 0, 1); 257 if (t && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0) 258 genmask = (struct sockaddr *)(t->rn_key); 259 else 260 senderr(ENOBUFS); 261 } 262 263 /* 264 * Verify that the caller has the appropriate privilege; RTM_GET 265 * is the only operation the non-superuser is allowed. 266 */ 267 if (rtm->rtm_type != RTM_GET && 268 suser(curproc->p_ucred, &curproc->p_acflag) != 0) 269 senderr(EACCES); 270 271 switch (rtm->rtm_type) { 272 273 case RTM_ADD: 274 if (gate == 0) 275 senderr(EINVAL); 276 error = rtrequest(RTM_ADD, dst, gate, netmask, 277 rtm->rtm_flags, &saved_nrt); 278 if (error == 0 && saved_nrt) { 279 rt_setmetrics(rtm->rtm_inits, 280 &rtm->rtm_rmx, &saved_nrt->rt_rmx); 281 saved_nrt->rt_refcnt--; 282 saved_nrt->rt_genmask = genmask; 283 } 284 break; 285 286 case RTM_DELETE: 287 error = rtrequest(RTM_DELETE, dst, gate, netmask, 288 rtm->rtm_flags, &saved_nrt); 289 if (error == 0) { 290 (rt = saved_nrt)->rt_refcnt++; 291 goto report; 292 } 293 break; 294 295 case RTM_GET: 296 case RTM_CHANGE: 297 case RTM_LOCK: 298 if ((rnh = rt_tables[dst->sa_family]) == 0) { 299 senderr(EAFNOSUPPORT); 300 } 301 rn = rnh->rnh_lookup(dst, netmask, rnh); 302 if (rn == NULL || (rn->rn_flags & RNF_ROOT) != 0) { 303 senderr(ESRCH); 304 } 305 rt = (struct rtentry *)rn; 306 rt->rt_refcnt++; 307 if (rtm->rtm_type != RTM_GET) {/* XXX: too grotty */ 308 struct radix_node *rn; 309 extern struct radix_node_head *mask_rnhead; 310 311 if (Bcmp(dst, rt_key(rt), dst->sa_len) != 0) 312 senderr(ESRCH); 313 if (netmask && (rn = rn_search(netmask, 314 mask_rnhead->rnh_treetop))) 315 netmask = (struct sockaddr *)rn->rn_key; 316 for (rn = rt->rt_nodes; rn; rn = rn->rn_dupedkey) 317 if (netmask == (struct sockaddr *)rn->rn_mask) 318 break; 319 if (rn == 0) 320 senderr(ETOOMANYREFS); 321 rt = (struct rtentry *)rn; 322 } 323 324 switch(rtm->rtm_type) { 325 326 case RTM_GET: 327 report: 328 dst = rt_key(rt); 329 gate = rt->rt_gateway; 330 netmask = rt_mask(rt); 331 genmask = rt->rt_genmask; 332 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 333 if ((ifp = rt->rt_ifp) != NULL) { 334 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 335 ifaaddr = rt->rt_ifa->ifa_addr; 336 if (ifp->if_flags & IFF_POINTOPOINT) 337 brdaddr = rt->rt_ifa->ifa_dstaddr; 338 else 339 brdaddr = 0; 340 rtm->rtm_index = ifp->if_index; 341 } else { 342 ifpaddr = 0; 343 ifaaddr = 0; 344 } 345 } 346 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)0, 347 (struct walkarg *)0, &len); 348 if (len > rtm->rtm_msglen) { 349 struct rt_msghdr *new_rtm; 350 R_Malloc(new_rtm, struct rt_msghdr *, len); 351 if (new_rtm == 0) 352 senderr(ENOBUFS); 353 Bcopy(rtm, new_rtm, rtm->rtm_msglen); 354 Free(rtm); rtm = new_rtm; 355 } 356 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, 357 (struct walkarg *)0, 0); 358 rtm->rtm_flags = rt->rt_flags; 359 rtm->rtm_rmx = rt->rt_rmx; 360 rtm->rtm_addrs = info.rti_addrs; 361 break; 362 363 case RTM_CHANGE: 364 if (gate && rt_setgate(rt, rt_key(rt), gate)) 365 senderr(EDQUOT); 366 /* new gateway could require new ifaddr, ifp; 367 flags may also be different; ifp may be specified 368 by ll sockaddr when protocol address is ambiguous */ 369 if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) && 370 (ifp = ifa->ifa_ifp) && (ifaaddr || gate)) 371 ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate, 372 ifp); 373 else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) || 374 (gate && (ifa = ifa_ifwithroute(rt->rt_flags, 375 rt_key(rt), gate)))) 376 ifp = ifa->ifa_ifp; 377 if (ifa) { 378 struct ifaddr *oifa = rt->rt_ifa; 379 if (oifa != ifa) { 380 if (oifa && oifa->ifa_rtrequest) 381 oifa->ifa_rtrequest(RTM_DELETE, 382 rt, gate); 383 IFAFREE(rt->rt_ifa); 384 rt->rt_ifa = ifa; 385 IFAREF(rt->rt_ifa); 386 rt->rt_ifp = ifp; 387 } 388 } 389 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 390 &rt->rt_rmx); 391 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 392 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate); 393 if (genmask) 394 rt->rt_genmask = genmask; 395 /* 396 * Fall into 397 */ 398 case RTM_LOCK: 399 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 400 rt->rt_rmx.rmx_locks |= 401 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 402 break; 403 } 404 break; 405 406 default: 407 senderr(EOPNOTSUPP); 408 } 409 410 flush: 411 if (rtm) { 412 if (error) 413 rtm->rtm_errno = error; 414 else 415 rtm->rtm_flags |= RTF_DONE; 416 } 417 if (rt) 418 rtfree(rt); 419 { 420 struct rawcb *rp = 0; 421 /* 422 * Check to see if we don't want our own messages. 423 */ 424 if ((so->so_options & SO_USELOOPBACK) == 0) { 425 if (route_cb.any_count <= 1) { 426 if (rtm) 427 Free(rtm); 428 m_freem(m); 429 return (error); 430 } 431 /* There is another listener, so construct message */ 432 rp = sotorawcb(so); 433 } 434 if (rtm) { 435 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 436 Free(rtm); 437 } 438 if (rp) 439 rp->rcb_proto.sp_family = 0; /* Avoid us */ 440 if (dst) 441 route_proto.sp_protocol = dst->sa_family; 442 raw_input(m, &route_proto, &route_src, &route_dst); 443 if (rp) 444 rp->rcb_proto.sp_family = PF_ROUTE; 445 } 446 return (error); 447 } 448 449 void 450 rt_setmetrics(which, in, out) 451 u_long which; 452 struct rt_metrics *in, *out; 453 { 454 #define metric(f, e) if (which & (f)) out->e = in->e; 455 metric(RTV_RPIPE, rmx_recvpipe); 456 metric(RTV_SPIPE, rmx_sendpipe); 457 metric(RTV_SSTHRESH, rmx_ssthresh); 458 metric(RTV_RTT, rmx_rtt); 459 metric(RTV_RTTVAR, rmx_rttvar); 460 metric(RTV_HOPCOUNT, rmx_hopcount); 461 metric(RTV_MTU, rmx_mtu); 462 metric(RTV_EXPIRE, rmx_expire); 463 #undef metric 464 } 465 466 #define ROUNDUP(a) \ 467 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 468 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 469 470 static void 471 rt_xaddrs(cp, cplim, rtinfo) 472 caddr_t cp, cplim; 473 struct rt_addrinfo *rtinfo; 474 { 475 struct sockaddr *sa; 476 int i; 477 478 bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info)); 479 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 480 if ((rtinfo->rti_addrs & (1 << i)) == 0) 481 continue; 482 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 483 ADVANCE(cp, sa); 484 } 485 } 486 487 static struct mbuf * 488 rt_msg1(type, rtinfo, data, datalen) 489 int type; 490 struct rt_addrinfo *rtinfo; 491 caddr_t data; 492 int datalen; 493 { 494 struct rt_msghdr *rtm; 495 struct mbuf *m; 496 int i; 497 struct sockaddr *sa; 498 int len, dlen; 499 500 m = m_gethdr(M_DONTWAIT, MT_DATA); 501 if (m == 0) 502 return (m); 503 switch (type) { 504 505 case RTM_DELADDR: 506 case RTM_NEWADDR: 507 len = sizeof(struct ifa_msghdr); 508 break; 509 510 #ifdef COMPAT_14 511 case RTM_OIFINFO: 512 len = sizeof(struct if_msghdr14); 513 break; 514 #endif 515 516 case RTM_IFINFO: 517 len = sizeof(struct if_msghdr); 518 break; 519 520 case RTM_IFANNOUNCE: 521 len = sizeof(struct if_announcemsghdr); 522 break; 523 524 default: 525 len = sizeof(struct rt_msghdr); 526 } 527 if (len > MHLEN + MLEN) 528 panic("rt_msg1: message too long"); 529 else if (len > MHLEN) { 530 m->m_next = m_get(M_DONTWAIT, MT_DATA); 531 if (m->m_next == NULL) { 532 m_freem(m); 533 return (NULL); 534 } 535 m->m_pkthdr.len = len; 536 m->m_len = MHLEN; 537 m->m_next->m_len = len - MHLEN; 538 } else { 539 m->m_pkthdr.len = m->m_len = len; 540 } 541 m->m_pkthdr.rcvif = 0; 542 m_copyback(m, 0, datalen, data); 543 rtm = mtod(m, struct rt_msghdr *); 544 for (i = 0; i < RTAX_MAX; i++) { 545 if ((sa = rtinfo->rti_info[i]) == NULL) 546 continue; 547 rtinfo->rti_addrs |= (1 << i); 548 dlen = ROUNDUP(sa->sa_len); 549 m_copyback(m, len, dlen, (caddr_t)sa); 550 len += dlen; 551 } 552 rtm->rtm_msglen = len; 553 rtm->rtm_version = RTM_VERSION; 554 rtm->rtm_type = type; 555 return (m); 556 } 557 558 /* 559 * rt_msg2 560 * 561 * fills 'cp' or 'w'.w_tmem with the routing socket message and 562 * returns the length of the message in 'lenp'. 563 * 564 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 565 * the message 566 * otherwise walkarg's w_needed is updated and if the user buffer is 567 * specified and w_needed indicates space exists the information is copied 568 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 569 * if the allocation fails ENOBUFS is returned. 570 */ 571 static int 572 rt_msg2(type, rtinfo, cp, w, lenp) 573 int type; 574 struct rt_addrinfo *rtinfo; 575 caddr_t cp; 576 struct walkarg *w; 577 int *lenp; 578 { 579 int i; 580 int len, dlen, second_time = 0; 581 caddr_t cp0; 582 583 rtinfo->rti_addrs = 0; 584 again: 585 switch (type) { 586 587 case RTM_DELADDR: 588 case RTM_NEWADDR: 589 len = sizeof(struct ifa_msghdr); 590 break; 591 #ifdef COMPAT_14 592 case RTM_OIFINFO: 593 len = sizeof(struct if_msghdr14); 594 break; 595 #endif 596 597 case RTM_IFINFO: 598 len = sizeof(struct if_msghdr); 599 break; 600 601 default: 602 len = sizeof(struct rt_msghdr); 603 } 604 if ((cp0 = cp) != NULL) 605 cp += len; 606 for (i = 0; i < RTAX_MAX; i++) { 607 struct sockaddr *sa; 608 609 if ((sa = rtinfo->rti_info[i]) == 0) 610 continue; 611 rtinfo->rti_addrs |= (1 << i); 612 dlen = ROUNDUP(sa->sa_len); 613 if (cp) { 614 bcopy(sa, cp, (unsigned)dlen); 615 cp += dlen; 616 } 617 len += dlen; 618 } 619 if (cp == 0 && w != NULL && !second_time) { 620 struct walkarg *rw = w; 621 622 rw->w_needed += len; 623 if (rw->w_needed <= 0 && rw->w_where) { 624 if (rw->w_tmemsize < len) { 625 if (rw->w_tmem) 626 free(rw->w_tmem, M_RTABLE); 627 rw->w_tmem = (caddr_t) malloc(len, M_RTABLE, 628 M_NOWAIT); 629 if (rw->w_tmem) 630 rw->w_tmemsize = len; 631 } 632 if (rw->w_tmem) { 633 cp = rw->w_tmem; 634 second_time = 1; 635 goto again; 636 } else { 637 rw->w_tmemneeded = len; 638 return (ENOBUFS); 639 } 640 } 641 } 642 if (cp) { 643 struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 644 645 rtm->rtm_version = RTM_VERSION; 646 rtm->rtm_type = type; 647 rtm->rtm_msglen = len; 648 } 649 if (lenp) 650 *lenp = len; 651 return (0); 652 } 653 654 /* 655 * This routine is called to generate a message from the routing 656 * socket indicating that a redirect has occured, a routing lookup 657 * has failed, or that a protocol has detected timeouts to a particular 658 * destination. 659 */ 660 void 661 rt_missmsg(type, rtinfo, flags, error) 662 int type, flags, error; 663 struct rt_addrinfo *rtinfo; 664 { 665 struct rt_msghdr rtm; 666 struct mbuf *m; 667 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 668 669 if (route_cb.any_count == 0) 670 return; 671 bzero(&rtm, sizeof(rtm)); 672 rtm.rtm_flags = RTF_DONE | flags; 673 rtm.rtm_errno = error; 674 m = rt_msg1(type, rtinfo, (caddr_t)&rtm, sizeof(rtm)); 675 if (m == 0) 676 return; 677 mtod(m, struct rt_msghdr *)->rtm_addrs = rtinfo->rti_addrs; 678 route_proto.sp_protocol = sa ? sa->sa_family : 0; 679 raw_input(m, &route_proto, &route_src, &route_dst); 680 } 681 682 /* 683 * This routine is called to generate a message from the routing 684 * socket indicating that the status of a network interface has changed. 685 */ 686 void 687 rt_ifmsg(ifp) 688 struct ifnet *ifp; 689 { 690 struct if_msghdr ifm; 691 #ifdef COMPAT_14 692 struct if_msghdr14 oifm; 693 #endif 694 struct mbuf *m; 695 struct rt_addrinfo info; 696 697 if (route_cb.any_count == 0) 698 return; 699 bzero(&info, sizeof(info)); 700 bzero(&ifm, sizeof(ifm)); 701 ifm.ifm_index = ifp->if_index; 702 ifm.ifm_flags = ifp->if_flags; 703 ifm.ifm_data = ifp->if_data; 704 ifm.ifm_addrs = 0; 705 m = rt_msg1(RTM_IFINFO, &info, (caddr_t)&ifm, sizeof(ifm)); 706 if (m == 0) 707 return; 708 route_proto.sp_protocol = 0; 709 raw_input(m, &route_proto, &route_src, &route_dst); 710 #ifdef COMPAT_14 711 bzero(&info, sizeof(info)); 712 bzero(&oifm, sizeof(oifm)); 713 oifm.ifm_index = ifp->if_index; 714 oifm.ifm_flags = ifp->if_flags; 715 oifm.ifm_data.ifi_type = ifp->if_data.ifi_type; 716 oifm.ifm_data.ifi_addrlen = ifp->if_data.ifi_addrlen; 717 oifm.ifm_data.ifi_hdrlen = ifp->if_data.ifi_hdrlen; 718 oifm.ifm_data.ifi_mtu = ifp->if_data.ifi_mtu; 719 oifm.ifm_data.ifi_metric = ifp->if_data.ifi_metric; 720 oifm.ifm_data.ifi_baudrate = ifp->if_data.ifi_baudrate; 721 oifm.ifm_data.ifi_ipackets = ifp->if_data.ifi_ipackets; 722 oifm.ifm_data.ifi_ierrors = ifp->if_data.ifi_ierrors; 723 oifm.ifm_data.ifi_opackets = ifp->if_data.ifi_opackets; 724 oifm.ifm_data.ifi_oerrors = ifp->if_data.ifi_oerrors; 725 oifm.ifm_data.ifi_collisions = ifp->if_data.ifi_collisions; 726 oifm.ifm_data.ifi_ibytes = ifp->if_data.ifi_ibytes; 727 oifm.ifm_data.ifi_obytes = ifp->if_data.ifi_obytes; 728 oifm.ifm_data.ifi_imcasts = ifp->if_data.ifi_imcasts; 729 oifm.ifm_data.ifi_omcasts = ifp->if_data.ifi_omcasts; 730 oifm.ifm_data.ifi_iqdrops = ifp->if_data.ifi_iqdrops; 731 oifm.ifm_data.ifi_noproto = ifp->if_data.ifi_noproto; 732 oifm.ifm_data.ifi_lastchange = ifp->if_data.ifi_lastchange; 733 oifm.ifm_addrs = 0; 734 m = rt_msg1(RTM_OIFINFO, &info, (caddr_t)&oifm, sizeof(oifm)); 735 if (m == 0) 736 return; 737 route_proto.sp_protocol = 0; 738 raw_input(m, &route_proto, &route_src, &route_dst); 739 #endif 740 } 741 742 /* 743 * This is called to generate messages from the routing socket 744 * indicating a network interface has had addresses associated with it. 745 * if we ever reverse the logic and replace messages TO the routing 746 * socket indicate a request to configure interfaces, then it will 747 * be unnecessary as the routing socket will automatically generate 748 * copies of it. 749 */ 750 void 751 rt_newaddrmsg(cmd, ifa, error, rt) 752 int cmd, error; 753 struct ifaddr *ifa; 754 struct rtentry *rt; 755 { 756 struct rt_addrinfo info; 757 struct sockaddr *sa = NULL; 758 int pass; 759 struct mbuf *m = NULL; 760 struct ifnet *ifp = ifa->ifa_ifp; 761 762 if (route_cb.any_count == 0) 763 return; 764 for (pass = 1; pass < 3; pass++) { 765 bzero(&info, sizeof(info)); 766 if ((cmd == RTM_ADD && pass == 1) || 767 (cmd == RTM_DELETE && pass == 2)) { 768 struct ifa_msghdr ifam; 769 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 770 771 ifaaddr = sa = ifa->ifa_addr; 772 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 773 netmask = ifa->ifa_netmask; 774 brdaddr = ifa->ifa_dstaddr; 775 bzero(&ifam, sizeof(ifam)); 776 ifam.ifam_index = ifp->if_index; 777 ifam.ifam_metric = ifa->ifa_metric; 778 ifam.ifam_flags = ifa->ifa_flags; 779 m = rt_msg1(ncmd, &info, (caddr_t)&ifam, sizeof(ifam)); 780 if (m == NULL) 781 continue; 782 mtod(m, struct ifa_msghdr *)->ifam_addrs = 783 info.rti_addrs; 784 } 785 if ((cmd == RTM_ADD && pass == 2) || 786 (cmd == RTM_DELETE && pass == 1)) { 787 struct rt_msghdr rtm; 788 789 if (rt == 0) 790 continue; 791 netmask = rt_mask(rt); 792 dst = sa = rt_key(rt); 793 gate = rt->rt_gateway; 794 bzero(&rtm, sizeof(rtm)); 795 rtm.rtm_index = ifp->if_index; 796 rtm.rtm_flags |= rt->rt_flags; 797 rtm.rtm_errno = error; 798 m = rt_msg1(cmd, &info, (caddr_t)&rtm, sizeof(rtm)); 799 if (m == NULL) 800 continue; 801 mtod(m, struct rt_msghdr *)->rtm_addrs = info.rti_addrs; 802 } 803 route_proto.sp_protocol = sa ? sa->sa_family : 0; 804 raw_input(m, &route_proto, &route_src, &route_dst); 805 } 806 } 807 808 /* 809 * This is called to generate routing socket messages indicating 810 * network interface arrival and departure. 811 */ 812 void 813 rt_ifannouncemsg(ifp, what) 814 struct ifnet *ifp; 815 int what; 816 { 817 struct if_announcemsghdr ifan; 818 struct mbuf *m; 819 struct rt_addrinfo info; 820 821 if (route_cb.any_count == 0) 822 return; 823 bzero(&info, sizeof(info)); 824 bzero(&ifan, sizeof(ifan)); 825 ifan.ifan_index = ifp->if_index; 826 strcpy(ifan.ifan_name, ifp->if_xname); 827 ifan.ifan_what = what; 828 m = rt_msg1(RTM_IFANNOUNCE, &info, (caddr_t)&ifan, sizeof(ifan)); 829 if (m == 0) 830 return; 831 route_proto.sp_protocol = 0; 832 raw_input(m, &route_proto, &route_src, &route_dst); 833 } 834 835 /* 836 * This is used in dumping the kernel table via sysctl(). 837 */ 838 static int 839 sysctl_dumpentry(rn, v) 840 struct radix_node *rn; 841 void *v; 842 { 843 struct walkarg *w = v; 844 struct rtentry *rt = (struct rtentry *)rn; 845 int error = 0, size; 846 struct rt_addrinfo info; 847 848 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 849 return 0; 850 bzero(&info, sizeof(info)); 851 dst = rt_key(rt); 852 gate = rt->rt_gateway; 853 netmask = rt_mask(rt); 854 genmask = rt->rt_genmask; 855 if (rt->rt_ifp) { 856 ifpaddr = rt->rt_ifp->if_addrlist.tqh_first->ifa_addr; 857 ifaaddr = rt->rt_ifa->ifa_addr; 858 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 859 brdaddr = rt->rt_ifa->ifa_dstaddr; 860 } 861 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 862 return (error); 863 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 864 struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 865 866 rtm->rtm_flags = rt->rt_flags; 867 rtm->rtm_use = rt->rt_use; 868 rtm->rtm_rmx = rt->rt_rmx; 869 rtm->rtm_index = rt->rt_ifp->if_index; 870 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 871 rtm->rtm_addrs = info.rti_addrs; 872 if ((error = copyout(rtm, w->w_where, size)) != 0) 873 w->w_where = NULL; 874 else 875 w->w_where += size; 876 } 877 return (error); 878 } 879 880 static int 881 sysctl_iflist(af, w, type) 882 int af; 883 struct walkarg *w; 884 int type; 885 { 886 struct ifnet *ifp; 887 struct ifaddr *ifa; 888 struct rt_addrinfo info; 889 int len, error = 0; 890 891 bzero(&info, sizeof(info)); 892 for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) { 893 if (w->w_arg && w->w_arg != ifp->if_index) 894 continue; 895 ifa = ifp->if_addrlist.tqh_first; 896 ifpaddr = ifa->ifa_addr; 897 switch(type) { 898 case NET_RT_IFLIST: 899 error = 900 rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w, &len); 901 break; 902 #ifdef COMPAT_14 903 case NET_RT_OIFLIST: 904 error = 905 rt_msg2(RTM_OIFINFO, &info, (caddr_t)0, w, &len); 906 break; 907 #endif 908 default: 909 panic("sysctl_iflist(1)"); 910 } 911 if (error) 912 return (error); 913 ifpaddr = 0; 914 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 915 switch(type) { 916 case NET_RT_IFLIST: { 917 struct if_msghdr *ifm; 918 919 ifm = (struct if_msghdr *)w->w_tmem; 920 ifm->ifm_index = ifp->if_index; 921 ifm->ifm_flags = ifp->if_flags; 922 ifm->ifm_data = ifp->if_data; 923 ifm->ifm_addrs = info.rti_addrs; 924 error = copyout(ifm, w->w_where, len); 925 if (error) 926 return (error); 927 w->w_where += len; 928 break; 929 } 930 931 #ifdef COMPAT_14 932 case NET_RT_OIFLIST: { 933 struct if_msghdr14 *ifm; 934 935 ifm = (struct if_msghdr14 *)w->w_tmem; 936 ifm->ifm_index = ifp->if_index; 937 ifm->ifm_flags = ifp->if_flags; 938 ifm->ifm_data.ifi_type = ifp->if_data.ifi_type; 939 ifm->ifm_data.ifi_addrlen = 940 ifp->if_data.ifi_addrlen; 941 ifm->ifm_data.ifi_hdrlen = 942 ifp->if_data.ifi_hdrlen; 943 ifm->ifm_data.ifi_mtu = ifp->if_data.ifi_mtu; 944 ifm->ifm_data.ifi_metric = 945 ifp->if_data.ifi_metric; 946 ifm->ifm_data.ifi_baudrate = 947 ifp->if_data.ifi_baudrate; 948 ifm->ifm_data.ifi_ipackets = 949 ifp->if_data.ifi_ipackets; 950 ifm->ifm_data.ifi_ierrors = 951 ifp->if_data.ifi_ierrors; 952 ifm->ifm_data.ifi_opackets = 953 ifp->if_data.ifi_opackets; 954 ifm->ifm_data.ifi_oerrors = 955 ifp->if_data.ifi_oerrors; 956 ifm->ifm_data.ifi_collisions = 957 ifp->if_data.ifi_collisions; 958 ifm->ifm_data.ifi_ibytes = 959 ifp->if_data.ifi_ibytes; 960 ifm->ifm_data.ifi_obytes = 961 ifp->if_data.ifi_obytes; 962 ifm->ifm_data.ifi_imcasts = 963 ifp->if_data.ifi_imcasts; 964 ifm->ifm_data.ifi_omcasts = 965 ifp->if_data.ifi_omcasts; 966 ifm->ifm_data.ifi_iqdrops = 967 ifp->if_data.ifi_iqdrops; 968 ifm->ifm_data.ifi_noproto = 969 ifp->if_data.ifi_noproto; 970 ifm->ifm_data.ifi_lastchange = 971 ifp->if_data.ifi_lastchange; 972 ifm->ifm_addrs = info.rti_addrs; 973 error = copyout(ifm, w->w_where, len); 974 if (error) 975 return (error); 976 w->w_where += len; 977 break; 978 } 979 #endif 980 default: 981 panic("sysctl_iflist(2)"); 982 } 983 } 984 while ((ifa = ifa->ifa_list.tqe_next) != NULL) { 985 if (af && af != ifa->ifa_addr->sa_family) 986 continue; 987 ifaaddr = ifa->ifa_addr; 988 netmask = ifa->ifa_netmask; 989 brdaddr = ifa->ifa_dstaddr; 990 if ((error = rt_msg2(RTM_NEWADDR, &info, 0, w, &len))) 991 return (error); 992 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 993 struct ifa_msghdr *ifam; 994 995 ifam = (struct ifa_msghdr *)w->w_tmem; 996 ifam->ifam_index = ifa->ifa_ifp->if_index; 997 ifam->ifam_flags = ifa->ifa_flags; 998 ifam->ifam_metric = ifa->ifa_metric; 999 ifam->ifam_addrs = info.rti_addrs; 1000 error = copyout(w->w_tmem, w->w_where, len); 1001 if (error) 1002 return (error); 1003 w->w_where += len; 1004 } 1005 } 1006 ifaaddr = netmask = brdaddr = 0; 1007 } 1008 return (0); 1009 } 1010 1011 static int 1012 sysctl_rtable(name, namelen, where, given, new, newlen) 1013 int *name; 1014 u_int namelen; 1015 void *where; 1016 size_t *given; 1017 void *new; 1018 size_t newlen; 1019 { 1020 struct radix_node_head *rnh; 1021 int i, s, error = EINVAL; 1022 u_char af; 1023 struct walkarg w; 1024 1025 if (new) 1026 return (EPERM); 1027 if (namelen != 3) 1028 return (EINVAL); 1029 af = name[0]; 1030 w.w_tmemneeded = 0; 1031 w.w_tmemsize = 0; 1032 w.w_tmem = NULL; 1033 again: 1034 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 1035 if (w.w_tmemneeded) { 1036 w.w_tmem = (caddr_t) malloc(w.w_tmemneeded, M_RTABLE, M_WAITOK); 1037 w.w_tmemsize = w.w_tmemneeded; 1038 w.w_tmemneeded = 0; 1039 } 1040 w.w_op = name[1]; 1041 w.w_arg = name[2]; 1042 w.w_given = *given; 1043 w.w_needed = 0 - w.w_given; 1044 w.w_where = where; 1045 1046 s = splsoftnet(); 1047 switch (w.w_op) { 1048 1049 case NET_RT_DUMP: 1050 case NET_RT_FLAGS: 1051 for (i = 1; i <= AF_MAX; i++) 1052 if ((rnh = rt_tables[i]) && (af == 0 || af == i) && 1053 (error = (*rnh->rnh_walktree)(rnh, 1054 sysctl_dumpentry, &w))) 1055 break; 1056 break; 1057 1058 #ifdef COMPAT_14 1059 case NET_RT_OIFLIST: 1060 error = sysctl_iflist(af, &w, w.w_op); 1061 break; 1062 #endif 1063 1064 case NET_RT_IFLIST: 1065 error = sysctl_iflist(af, &w, w.w_op); 1066 } 1067 splx(s); 1068 1069 /* check to see if we couldn't allocate memory with NOWAIT */ 1070 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 1071 goto again; 1072 1073 if (w.w_tmem) 1074 free(w.w_tmem, M_RTABLE); 1075 w.w_needed += w.w_given; 1076 if (where) { 1077 *given = w.w_where - (caddr_t) where; 1078 if (*given < w.w_needed) 1079 return (ENOMEM); 1080 } else { 1081 *given = (11 * w.w_needed) / 10; 1082 } 1083 return (error); 1084 } 1085 1086 /* 1087 * Definitions of protocols supported in the ROUTE domain. 1088 */ 1089 1090 extern struct domain routedomain; /* or at least forward */ 1091 1092 struct protosw routesw[] = { 1093 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 1094 raw_input, route_output, raw_ctlinput, 0, 1095 route_usrreq, 1096 raw_init, 0, 0, 0, 1097 sysctl_rtable, 1098 } 1099 }; 1100 1101 struct domain routedomain = 1102 { PF_ROUTE, "route", route_init, 0, 0, 1103 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 1104
Indexes created Fri Oct 03 02:09:57 GMT 2025