rtsock.c revision 1.40
1 /* $NetBSD: rtsock.c,v 1.40 2000/04/15 17:51:28 simonb 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++; 307 308 switch(rtm->rtm_type) { 309 310 case RTM_GET: 311 report: 312 dst = rt_key(rt); 313 gate = rt->rt_gateway; 314 netmask = rt_mask(rt); 315 genmask = rt->rt_genmask; 316 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 317 if ((ifp = rt->rt_ifp) != NULL) { 318 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 319 ifaaddr = rt->rt_ifa->ifa_addr; 320 if (ifp->if_flags & IFF_POINTOPOINT) 321 brdaddr = rt->rt_ifa->ifa_dstaddr; 322 else 323 brdaddr = 0; 324 rtm->rtm_index = ifp->if_index; 325 } else { 326 ifpaddr = 0; 327 ifaaddr = 0; 328 } 329 } 330 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)0, 331 (struct walkarg *)0, &len); 332 if (len > rtm->rtm_msglen) { 333 struct rt_msghdr *new_rtm; 334 R_Malloc(new_rtm, struct rt_msghdr *, len); 335 if (new_rtm == 0) 336 senderr(ENOBUFS); 337 Bcopy(rtm, new_rtm, rtm->rtm_msglen); 338 Free(rtm); rtm = new_rtm; 339 } 340 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, 341 (struct walkarg *)0, 0); 342 rtm->rtm_flags = rt->rt_flags; 343 rtm->rtm_rmx = rt->rt_rmx; 344 rtm->rtm_addrs = info.rti_addrs; 345 break; 346 347 case RTM_CHANGE: 348 if (gate && rt_setgate(rt, rt_key(rt), gate)) 349 senderr(EDQUOT); 350 /* new gateway could require new ifaddr, ifp; 351 flags may also be different; ifp may be specified 352 by ll sockaddr when protocol address is ambiguous */ 353 if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) && 354 (ifp = ifa->ifa_ifp) && (ifaaddr || gate)) 355 ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate, 356 ifp); 357 else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) || 358 (gate && (ifa = ifa_ifwithroute(rt->rt_flags, 359 rt_key(rt), gate)))) 360 ifp = ifa->ifa_ifp; 361 if (ifa) { 362 struct ifaddr *oifa = rt->rt_ifa; 363 if (oifa != ifa) { 364 if (oifa && oifa->ifa_rtrequest) 365 oifa->ifa_rtrequest(RTM_DELETE, 366 rt, gate); 367 IFAFREE(rt->rt_ifa); 368 rt->rt_ifa = ifa; 369 IFAREF(rt->rt_ifa); 370 rt->rt_ifp = ifp; 371 } 372 } 373 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 374 &rt->rt_rmx); 375 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 376 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate); 377 if (genmask) 378 rt->rt_genmask = genmask; 379 /* 380 * Fall into 381 */ 382 case RTM_LOCK: 383 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 384 rt->rt_rmx.rmx_locks |= 385 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 386 break; 387 } 388 break; 389 390 default: 391 senderr(EOPNOTSUPP); 392 } 393 394 flush: 395 if (rtm) { 396 if (error) 397 rtm->rtm_errno = error; 398 else 399 rtm->rtm_flags |= RTF_DONE; 400 } 401 if (rt) 402 rtfree(rt); 403 { 404 struct rawcb *rp = 0; 405 /* 406 * Check to see if we don't want our own messages. 407 */ 408 if ((so->so_options & SO_USELOOPBACK) == 0) { 409 if (route_cb.any_count <= 1) { 410 if (rtm) 411 Free(rtm); 412 m_freem(m); 413 return (error); 414 } 415 /* There is another listener, so construct message */ 416 rp = sotorawcb(so); 417 } 418 if (rtm) { 419 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 420 Free(rtm); 421 } 422 if (rp) 423 rp->rcb_proto.sp_family = 0; /* Avoid us */ 424 if (dst) 425 route_proto.sp_protocol = dst->sa_family; 426 raw_input(m, &route_proto, &route_src, &route_dst); 427 if (rp) 428 rp->rcb_proto.sp_family = PF_ROUTE; 429 } 430 return (error); 431 } 432 433 void 434 rt_setmetrics(which, in, out) 435 u_long which; 436 struct rt_metrics *in, *out; 437 { 438 #define metric(f, e) if (which & (f)) out->e = in->e; 439 metric(RTV_RPIPE, rmx_recvpipe); 440 metric(RTV_SPIPE, rmx_sendpipe); 441 metric(RTV_SSTHRESH, rmx_ssthresh); 442 metric(RTV_RTT, rmx_rtt); 443 metric(RTV_RTTVAR, rmx_rttvar); 444 metric(RTV_HOPCOUNT, rmx_hopcount); 445 metric(RTV_MTU, rmx_mtu); 446 metric(RTV_EXPIRE, rmx_expire); 447 #undef metric 448 } 449 450 #define ROUNDUP(a) \ 451 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 452 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 453 454 static void 455 rt_xaddrs(cp, cplim, rtinfo) 456 caddr_t cp, cplim; 457 struct rt_addrinfo *rtinfo; 458 { 459 struct sockaddr *sa; 460 int i; 461 462 bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info)); 463 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 464 if ((rtinfo->rti_addrs & (1 << i)) == 0) 465 continue; 466 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 467 ADVANCE(cp, sa); 468 } 469 } 470 471 static struct mbuf * 472 rt_msg1(type, rtinfo, data, datalen) 473 int type; 474 struct rt_addrinfo *rtinfo; 475 caddr_t data; 476 int datalen; 477 { 478 struct rt_msghdr *rtm; 479 struct mbuf *m; 480 int i; 481 struct sockaddr *sa; 482 int len, dlen; 483 484 m = m_gethdr(M_DONTWAIT, MT_DATA); 485 if (m == 0) 486 return (m); 487 switch (type) { 488 489 case RTM_DELADDR: 490 case RTM_NEWADDR: 491 len = sizeof(struct ifa_msghdr); 492 break; 493 494 #ifdef COMPAT_14 495 case RTM_OIFINFO: 496 len = sizeof(struct if_msghdr14); 497 break; 498 #endif 499 500 case RTM_IFINFO: 501 len = sizeof(struct if_msghdr); 502 break; 503 504 case RTM_IFANNOUNCE: 505 len = sizeof(struct if_announcemsghdr); 506 break; 507 508 default: 509 len = sizeof(struct rt_msghdr); 510 } 511 if (len > MHLEN + MLEN) 512 panic("rt_msg1: message too long"); 513 else if (len > MHLEN) { 514 m->m_next = m_get(M_DONTWAIT, MT_DATA); 515 if (m->m_next == NULL) { 516 m_freem(m); 517 return (NULL); 518 } 519 m->m_pkthdr.len = len; 520 m->m_len = MHLEN; 521 m->m_next->m_len = len - MHLEN; 522 } else { 523 m->m_pkthdr.len = m->m_len = len; 524 } 525 m->m_pkthdr.rcvif = 0; 526 m_copyback(m, 0, datalen, data); 527 rtm = mtod(m, struct rt_msghdr *); 528 for (i = 0; i < RTAX_MAX; i++) { 529 if ((sa = rtinfo->rti_info[i]) == NULL) 530 continue; 531 rtinfo->rti_addrs |= (1 << i); 532 dlen = ROUNDUP(sa->sa_len); 533 m_copyback(m, len, dlen, (caddr_t)sa); 534 len += dlen; 535 } 536 rtm->rtm_msglen = len; 537 rtm->rtm_version = RTM_VERSION; 538 rtm->rtm_type = type; 539 return (m); 540 } 541 542 /* 543 * rt_msg2 544 * 545 * fills 'cp' or 'w'.w_tmem with the routing socket message and 546 * returns the length of the message in 'lenp'. 547 * 548 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 549 * the message 550 * otherwise walkarg's w_needed is updated and if the user buffer is 551 * specified and w_needed indicates space exists the information is copied 552 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 553 * if the allocation fails ENOBUFS is returned. 554 */ 555 static int 556 rt_msg2(type, rtinfo, cp, w, lenp) 557 int type; 558 struct rt_addrinfo *rtinfo; 559 caddr_t cp; 560 struct walkarg *w; 561 int *lenp; 562 { 563 int i; 564 int len, dlen, second_time = 0; 565 caddr_t cp0; 566 567 rtinfo->rti_addrs = 0; 568 again: 569 switch (type) { 570 571 case RTM_DELADDR: 572 case RTM_NEWADDR: 573 len = sizeof(struct ifa_msghdr); 574 break; 575 #ifdef COMPAT_14 576 case RTM_OIFINFO: 577 len = sizeof(struct if_msghdr14); 578 break; 579 #endif 580 581 case RTM_IFINFO: 582 len = sizeof(struct if_msghdr); 583 break; 584 585 default: 586 len = sizeof(struct rt_msghdr); 587 } 588 if ((cp0 = cp) != NULL) 589 cp += len; 590 for (i = 0; i < RTAX_MAX; i++) { 591 struct sockaddr *sa; 592 593 if ((sa = rtinfo->rti_info[i]) == 0) 594 continue; 595 rtinfo->rti_addrs |= (1 << i); 596 dlen = ROUNDUP(sa->sa_len); 597 if (cp) { 598 bcopy(sa, cp, (unsigned)dlen); 599 cp += dlen; 600 } 601 len += dlen; 602 } 603 if (cp == 0 && w != NULL && !second_time) { 604 struct walkarg *rw = w; 605 606 rw->w_needed += len; 607 if (rw->w_needed <= 0 && rw->w_where) { 608 if (rw->w_tmemsize < len) { 609 if (rw->w_tmem) 610 free(rw->w_tmem, M_RTABLE); 611 rw->w_tmem = (caddr_t) malloc(len, M_RTABLE, 612 M_NOWAIT); 613 if (rw->w_tmem) 614 rw->w_tmemsize = len; 615 } 616 if (rw->w_tmem) { 617 cp = rw->w_tmem; 618 second_time = 1; 619 goto again; 620 } else { 621 rw->w_tmemneeded = len; 622 return (ENOBUFS); 623 } 624 } 625 } 626 if (cp) { 627 struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 628 629 rtm->rtm_version = RTM_VERSION; 630 rtm->rtm_type = type; 631 rtm->rtm_msglen = len; 632 } 633 if (lenp) 634 *lenp = len; 635 return (0); 636 } 637 638 /* 639 * This routine is called to generate a message from the routing 640 * socket indicating that a redirect has occured, a routing lookup 641 * has failed, or that a protocol has detected timeouts to a particular 642 * destination. 643 */ 644 void 645 rt_missmsg(type, rtinfo, flags, error) 646 int type, flags, error; 647 struct rt_addrinfo *rtinfo; 648 { 649 struct rt_msghdr rtm; 650 struct mbuf *m; 651 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 652 653 if (route_cb.any_count == 0) 654 return; 655 bzero(&rtm, sizeof(rtm)); 656 rtm.rtm_flags = RTF_DONE | flags; 657 rtm.rtm_errno = error; 658 m = rt_msg1(type, rtinfo, (caddr_t)&rtm, sizeof(rtm)); 659 if (m == 0) 660 return; 661 mtod(m, struct rt_msghdr *)->rtm_addrs = rtinfo->rti_addrs; 662 route_proto.sp_protocol = sa ? sa->sa_family : 0; 663 raw_input(m, &route_proto, &route_src, &route_dst); 664 } 665 666 /* 667 * This routine is called to generate a message from the routing 668 * socket indicating that the status of a network interface has changed. 669 */ 670 void 671 rt_ifmsg(ifp) 672 struct ifnet *ifp; 673 { 674 struct if_msghdr ifm; 675 #ifdef COMPAT_14 676 struct if_msghdr14 oifm; 677 #endif 678 struct mbuf *m; 679 struct rt_addrinfo info; 680 681 if (route_cb.any_count == 0) 682 return; 683 bzero(&info, sizeof(info)); 684 bzero(&ifm, sizeof(ifm)); 685 ifm.ifm_index = ifp->if_index; 686 ifm.ifm_flags = ifp->if_flags; 687 ifm.ifm_data = ifp->if_data; 688 ifm.ifm_addrs = 0; 689 m = rt_msg1(RTM_IFINFO, &info, (caddr_t)&ifm, sizeof(ifm)); 690 if (m == 0) 691 return; 692 route_proto.sp_protocol = 0; 693 raw_input(m, &route_proto, &route_src, &route_dst); 694 #ifdef COMPAT_14 695 bzero(&info, sizeof(info)); 696 bzero(&oifm, sizeof(ifm)); 697 oifm.ifm_index = ifp->if_index; 698 oifm.ifm_flags = ifp->if_flags; 699 oifm.ifm_data.ifi_type = ifp->if_data.ifi_type; 700 oifm.ifm_data.ifi_addrlen = ifp->if_data.ifi_addrlen; 701 oifm.ifm_data.ifi_hdrlen = ifp->if_data.ifi_hdrlen; 702 oifm.ifm_data.ifi_mtu = ifp->if_data.ifi_mtu; 703 oifm.ifm_data.ifi_metric = ifp->if_data.ifi_metric; 704 oifm.ifm_data.ifi_baudrate = ifp->if_data.ifi_baudrate; 705 oifm.ifm_data.ifi_ipackets = ifp->if_data.ifi_ipackets; 706 oifm.ifm_data.ifi_ierrors = ifp->if_data.ifi_ierrors; 707 oifm.ifm_data.ifi_opackets = ifp->if_data.ifi_opackets; 708 oifm.ifm_data.ifi_oerrors = ifp->if_data.ifi_oerrors; 709 oifm.ifm_data.ifi_collisions = ifp->if_data.ifi_collisions; 710 oifm.ifm_data.ifi_ibytes = ifp->if_data.ifi_ibytes; 711 oifm.ifm_data.ifi_obytes = ifp->if_data.ifi_obytes; 712 oifm.ifm_data.ifi_imcasts = ifp->if_data.ifi_imcasts; 713 oifm.ifm_data.ifi_omcasts = ifp->if_data.ifi_omcasts; 714 oifm.ifm_data.ifi_iqdrops = ifp->if_data.ifi_iqdrops; 715 oifm.ifm_data.ifi_noproto = ifp->if_data.ifi_noproto; 716 oifm.ifm_data.ifi_lastchange = ifp->if_data.ifi_lastchange; 717 oifm.ifm_addrs = 0; 718 m = rt_msg1(RTM_OIFINFO, &info, (caddr_t)&oifm, sizeof(oifm)); 719 if (m == 0) 720 return; 721 route_proto.sp_protocol = 0; 722 raw_input(m, &route_proto, &route_src, &route_dst); 723 #endif 724 } 725 726 /* 727 * This is called to generate messages from the routing socket 728 * indicating a network interface has had addresses associated with it. 729 * if we ever reverse the logic and replace messages TO the routing 730 * socket indicate a request to configure interfaces, then it will 731 * be unnecessary as the routing socket will automatically generate 732 * copies of it. 733 */ 734 void 735 rt_newaddrmsg(cmd, ifa, error, rt) 736 int cmd, error; 737 struct ifaddr *ifa; 738 struct rtentry *rt; 739 { 740 struct rt_addrinfo info; 741 struct sockaddr *sa = NULL; 742 int pass; 743 struct mbuf *m = NULL; 744 struct ifnet *ifp = ifa->ifa_ifp; 745 746 if (route_cb.any_count == 0) 747 return; 748 for (pass = 1; pass < 3; pass++) { 749 bzero(&info, sizeof(info)); 750 if ((cmd == RTM_ADD && pass == 1) || 751 (cmd == RTM_DELETE && pass == 2)) { 752 struct ifa_msghdr ifam; 753 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 754 755 ifaaddr = sa = ifa->ifa_addr; 756 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 757 netmask = ifa->ifa_netmask; 758 brdaddr = ifa->ifa_dstaddr; 759 bzero(&ifam, sizeof(ifam)); 760 ifam.ifam_index = ifp->if_index; 761 ifam.ifam_metric = ifa->ifa_metric; 762 ifam.ifam_flags = ifa->ifa_flags; 763 m = rt_msg1(ncmd, &info, (caddr_t)&ifam, sizeof(ifam)); 764 if (m == NULL) 765 continue; 766 mtod(m, struct ifa_msghdr *)->ifam_addrs = 767 info.rti_addrs; 768 } 769 if ((cmd == RTM_ADD && pass == 2) || 770 (cmd == RTM_DELETE && pass == 1)) { 771 struct rt_msghdr rtm; 772 773 if (rt == 0) 774 continue; 775 netmask = rt_mask(rt); 776 dst = sa = rt_key(rt); 777 gate = rt->rt_gateway; 778 bzero(&rtm, sizeof(rtm)); 779 rtm.rtm_index = ifp->if_index; 780 rtm.rtm_flags |= rt->rt_flags; 781 rtm.rtm_errno = error; 782 m = rt_msg1(cmd, &info, (caddr_t)&rtm, sizeof(rtm)); 783 if (m == NULL) 784 continue; 785 mtod(m, struct rt_msghdr *)->rtm_addrs = info.rti_addrs; 786 } 787 route_proto.sp_protocol = sa ? sa->sa_family : 0; 788 raw_input(m, &route_proto, &route_src, &route_dst); 789 } 790 } 791 792 /* 793 * This is called to generate routing socket messages indicating 794 * network interface arrival and departure. 795 */ 796 void 797 rt_ifannouncemsg(ifp, what) 798 struct ifnet *ifp; 799 int what; 800 { 801 struct if_announcemsghdr ifan; 802 struct mbuf *m; 803 struct rt_addrinfo info; 804 805 if (route_cb.any_count == 0) 806 return; 807 bzero(&info, sizeof(info)); 808 bzero(&ifan, sizeof(ifan)); 809 ifan.ifan_index = ifp->if_index; 810 strcpy(ifan.ifan_name, ifp->if_xname); 811 ifan.ifan_what = what; 812 m = rt_msg1(RTM_IFANNOUNCE, &info, (caddr_t)&ifan, sizeof(ifan)); 813 if (m == 0) 814 return; 815 route_proto.sp_protocol = 0; 816 raw_input(m, &route_proto, &route_src, &route_dst); 817 } 818 819 /* 820 * This is used in dumping the kernel table via sysctl(). 821 */ 822 static int 823 sysctl_dumpentry(rn, v) 824 struct radix_node *rn; 825 void *v; 826 { 827 struct walkarg *w = v; 828 struct rtentry *rt = (struct rtentry *)rn; 829 int error = 0, size; 830 struct rt_addrinfo info; 831 832 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 833 return 0; 834 bzero(&info, sizeof(info)); 835 dst = rt_key(rt); 836 gate = rt->rt_gateway; 837 netmask = rt_mask(rt); 838 genmask = rt->rt_genmask; 839 if (rt->rt_ifp) { 840 ifpaddr = rt->rt_ifp->if_addrlist.tqh_first->ifa_addr; 841 ifaaddr = rt->rt_ifa->ifa_addr; 842 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 843 brdaddr = rt->rt_ifa->ifa_dstaddr; 844 } 845 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 846 return (error); 847 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 848 struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 849 850 rtm->rtm_flags = rt->rt_flags; 851 rtm->rtm_use = rt->rt_use; 852 rtm->rtm_rmx = rt->rt_rmx; 853 rtm->rtm_index = rt->rt_ifp->if_index; 854 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 855 rtm->rtm_addrs = info.rti_addrs; 856 if ((error = copyout(rtm, w->w_where, size)) != 0) 857 w->w_where = NULL; 858 else 859 w->w_where += size; 860 } 861 return (error); 862 } 863 864 static int 865 sysctl_iflist(af, w, type) 866 int af; 867 struct walkarg *w; 868 int type; 869 { 870 struct ifnet *ifp; 871 struct ifaddr *ifa; 872 struct rt_addrinfo info; 873 int len, error = 0; 874 875 bzero(&info, sizeof(info)); 876 for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) { 877 if (w->w_arg && w->w_arg != ifp->if_index) 878 continue; 879 ifa = ifp->if_addrlist.tqh_first; 880 ifpaddr = ifa->ifa_addr; 881 switch(type) { 882 case NET_RT_IFLIST: 883 error = 884 rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w, &len); 885 break; 886 #ifdef COMPAT_14 887 case NET_RT_OIFLIST: 888 error = 889 rt_msg2(RTM_OIFINFO, &info, (caddr_t)0, w, &len); 890 break; 891 #endif 892 default: 893 panic("sysctl_iflist(1)"); 894 } 895 if (error) 896 return (error); 897 ifpaddr = 0; 898 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 899 switch(type) { 900 case NET_RT_IFLIST: { 901 struct if_msghdr *ifm; 902 903 ifm = (struct if_msghdr *)w->w_tmem; 904 ifm->ifm_index = ifp->if_index; 905 ifm->ifm_flags = ifp->if_flags; 906 ifm->ifm_data = ifp->if_data; 907 ifm->ifm_addrs = info.rti_addrs; 908 error = copyout(ifm, w->w_where, len); 909 if (error) 910 return (error); 911 w->w_where += len; 912 break; 913 } 914 915 #ifdef COMPAT_14 916 case NET_RT_OIFLIST: { 917 struct if_msghdr14 *ifm; 918 919 ifm = (struct if_msghdr14 *)w->w_tmem; 920 ifm->ifm_index = ifp->if_index; 921 ifm->ifm_flags = ifp->if_flags; 922 ifm->ifm_data.ifi_type = ifp->if_data.ifi_type; 923 ifm->ifm_data.ifi_addrlen = 924 ifp->if_data.ifi_addrlen; 925 ifm->ifm_data.ifi_hdrlen = 926 ifp->if_data.ifi_hdrlen; 927 ifm->ifm_data.ifi_mtu = ifp->if_data.ifi_mtu; 928 ifm->ifm_data.ifi_metric = 929 ifp->if_data.ifi_metric; 930 ifm->ifm_data.ifi_baudrate = 931 ifp->if_data.ifi_baudrate; 932 ifm->ifm_data.ifi_ipackets = 933 ifp->if_data.ifi_ipackets; 934 ifm->ifm_data.ifi_ierrors = 935 ifp->if_data.ifi_ierrors; 936 ifm->ifm_data.ifi_opackets = 937 ifp->if_data.ifi_opackets; 938 ifm->ifm_data.ifi_oerrors = 939 ifp->if_data.ifi_oerrors; 940 ifm->ifm_data.ifi_collisions = 941 ifp->if_data.ifi_collisions; 942 ifm->ifm_data.ifi_ibytes = 943 ifp->if_data.ifi_ibytes; 944 ifm->ifm_data.ifi_obytes = 945 ifp->if_data.ifi_obytes; 946 ifm->ifm_data.ifi_imcasts = 947 ifp->if_data.ifi_imcasts; 948 ifm->ifm_data.ifi_omcasts = 949 ifp->if_data.ifi_omcasts; 950 ifm->ifm_data.ifi_iqdrops = 951 ifp->if_data.ifi_iqdrops; 952 ifm->ifm_data.ifi_noproto = 953 ifp->if_data.ifi_noproto; 954 ifm->ifm_data.ifi_lastchange = 955 ifp->if_data.ifi_lastchange; 956 ifm->ifm_addrs = info.rti_addrs; 957 error = copyout(ifm, w->w_where, len); 958 if (error) 959 return (error); 960 w->w_where += len; 961 break; 962 } 963 #endif 964 default: 965 panic("sysctl_iflist(2)"); 966 } 967 } 968 while ((ifa = ifa->ifa_list.tqe_next) != NULL) { 969 if (af && af != ifa->ifa_addr->sa_family) 970 continue; 971 ifaaddr = ifa->ifa_addr; 972 netmask = ifa->ifa_netmask; 973 brdaddr = ifa->ifa_dstaddr; 974 if ((error = rt_msg2(RTM_NEWADDR, &info, 0, w, &len))) 975 return (error); 976 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 977 struct ifa_msghdr *ifam; 978 979 ifam = (struct ifa_msghdr *)w->w_tmem; 980 ifam->ifam_index = ifa->ifa_ifp->if_index; 981 ifam->ifam_flags = ifa->ifa_flags; 982 ifam->ifam_metric = ifa->ifa_metric; 983 ifam->ifam_addrs = info.rti_addrs; 984 error = copyout(w->w_tmem, w->w_where, len); 985 if (error) 986 return (error); 987 w->w_where += len; 988 } 989 } 990 ifaaddr = netmask = brdaddr = 0; 991 } 992 return (0); 993 } 994 995 static int 996 sysctl_rtable(name, namelen, where, given, new, newlen) 997 int *name; 998 u_int namelen; 999 void *where; 1000 size_t *given; 1001 void *new; 1002 size_t newlen; 1003 { 1004 struct radix_node_head *rnh; 1005 int i, s, error = EINVAL; 1006 u_char af; 1007 struct walkarg w; 1008 1009 if (new) 1010 return (EPERM); 1011 if (namelen != 3) 1012 return (EINVAL); 1013 af = name[0]; 1014 w.w_tmemneeded = 0; 1015 w.w_tmemsize = 0; 1016 w.w_tmem = NULL; 1017 again: 1018 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 1019 if (w.w_tmemneeded) { 1020 w.w_tmem = (caddr_t) malloc(w.w_tmemneeded, M_RTABLE, M_WAITOK); 1021 w.w_tmemsize = w.w_tmemneeded; 1022 w.w_tmemneeded = 0; 1023 } 1024 w.w_op = name[1]; 1025 w.w_arg = name[2]; 1026 w.w_given = *given; 1027 w.w_needed = 0 - w.w_given; 1028 w.w_where = where; 1029 1030 s = splsoftnet(); 1031 switch (w.w_op) { 1032 1033 case NET_RT_DUMP: 1034 case NET_RT_FLAGS: 1035 for (i = 1; i <= AF_MAX; i++) 1036 if ((rnh = rt_tables[i]) && (af == 0 || af == i) && 1037 (error = (*rnh->rnh_walktree)(rnh, 1038 sysctl_dumpentry, &w))) 1039 break; 1040 break; 1041 1042 #ifdef COMPAT_14 1043 case NET_RT_OIFLIST: 1044 error = sysctl_iflist(af, &w, w.w_op); 1045 break; 1046 #endif 1047 1048 case NET_RT_IFLIST: 1049 error = sysctl_iflist(af, &w, w.w_op); 1050 } 1051 splx(s); 1052 1053 /* check to see if we couldn't allocate memory with NOWAIT */ 1054 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 1055 goto again; 1056 1057 if (w.w_tmem) 1058 free(w.w_tmem, M_RTABLE); 1059 w.w_needed += w.w_given; 1060 if (where) { 1061 *given = w.w_where - (caddr_t) where; 1062 if (*given < w.w_needed) 1063 return (ENOMEM); 1064 } else { 1065 *given = (11 * w.w_needed) / 10; 1066 } 1067 return (error); 1068 } 1069 1070 /* 1071 * Definitions of protocols supported in the ROUTE domain. 1072 */ 1073 1074 extern struct domain routedomain; /* or at least forward */ 1075 1076 struct protosw routesw[] = { 1077 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 1078 raw_input, route_output, raw_ctlinput, 0, 1079 route_usrreq, 1080 raw_init, 0, 0, 0, 1081 sysctl_rtable, 1082 } 1083 }; 1084 1085 struct domain routedomain = 1086 { PF_ROUTE, "route", route_init, 0, 0, 1087 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 1088
Indexes created Tue Sep 23 14:10:03 GMT 2025