1 /* 2 * Copyright (c) 1988, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)rtsock.c 8.5 (Berkeley) 11/2/94 34 * $Id: rtsock.c,v 1.34 1997/09/14 03:10:38 peter Exp $ 35 */ 36 37 38 #include <sys/param.h> 39 #include <sys/queue.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/sysctl.h> 43 #include <sys/proc.h> 44 #include <sys/malloc.h> 45 #include <sys/mbuf.h> 46 #include <sys/socket.h> 47 #include <sys/socketvar.h> 48 #include <sys/domain.h> 49 #include <sys/protosw.h> 50 51 #include <net/if.h> 52 #include <net/route.h> 53 #include <net/raw_cb.h> 54 55 MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables"); 56 57 static struct sockaddr route_dst = { 2, PF_ROUTE, }; 58 static struct sockaddr route_src = { 2, PF_ROUTE, }; 59 static struct sockaddr sa_zero = { sizeof(sa_zero), AF_INET, }; 60 static struct sockproto route_proto = { PF_ROUTE, }; 61 62 struct walkarg { 63 int w_tmemsize; 64 int w_op, w_arg; 65 caddr_t w_tmem; 66 struct sysctl_req *w_req; 67 }; 68 69 static struct mbuf * 70 rt_msg1 __P((int, struct rt_addrinfo *)); 71 static int rt_msg2 __P((int, 72 struct rt_addrinfo *, caddr_t, struct walkarg *)); 73 static int rt_xaddrs __P((caddr_t, caddr_t, struct rt_addrinfo *)); 74 static int sysctl_dumpentry __P((struct radix_node *rn, void *vw)); 75 static int sysctl_iflist __P((int af, struct walkarg *w)); 76 static int route_output __P((struct mbuf *, struct socket *)); 77 static void rt_setmetrics __P((u_long, struct rt_metrics *, struct rt_metrics *)); 78 79 /* Sleazy use of local variables throughout file, warning!!!! */ 80 #define dst info.rti_info[RTAX_DST] 81 #define gate info.rti_info[RTAX_GATEWAY] 82 #define netmask info.rti_info[RTAX_NETMASK] 83 #define genmask info.rti_info[RTAX_GENMASK] 84 #define ifpaddr info.rti_info[RTAX_IFP] 85 #define ifaaddr info.rti_info[RTAX_IFA] 86 #define brdaddr info.rti_info[RTAX_BRD] 87 88 /* 89 * It really doesn't make any sense at all for this code to share much 90 * with raw_usrreq.c, since its functionality is so restricted. XXX 91 */ 92 static int 93 rts_abort(struct socket *so) 94 { 95 int s, error; 96 s = splnet(); 97 error = raw_usrreqs.pru_abort(so); 98 splx(s); 99 return error; 100 } 101 102 /* pru_accept is EOPNOTSUPP */ 103 104 static int 105 rts_attach(struct socket *so, int proto, struct proc *p) 106 { 107 struct rawcb *rp; 108 int s, error; 109 110 if (sotorawcb(so) != 0) 111 return EISCONN; /* XXX panic? */ 112 MALLOC(rp, struct rawcb *, sizeof *rp, M_PCB, M_WAITOK); /* XXX */ 113 if (rp == 0) 114 return ENOBUFS; 115 bzero(rp, sizeof *rp); 116 117 /* 118 * The splnet() is necessary to block protocols from sending 119 * error notifications (like RTM_REDIRECT or RTM_LOSING) while 120 * this PCB is extant but incompletely initialized. 121 * Probably we should try to do more of this work beforehand and 122 * eliminate the spl. 123 */ 124 s = splnet(); 125 so->so_pcb = (caddr_t)rp; 126 error = raw_usrreqs.pru_attach(so, proto, p); 127 rp = sotorawcb(so); 128 if (error) { 129 splx(s); 130 free(rp, M_PCB); 131 return error; 132 } 133 switch(rp->rcb_proto.sp_protocol) { 134 case AF_INET: 135 route_cb.ip_count++; 136 break; 137 case AF_IPX: 138 route_cb.ipx_count++; 139 break; 140 case AF_NS: 141 route_cb.ns_count++; 142 break; 143 case AF_ISO: 144 route_cb.iso_count++; 145 break; 146 } 147 rp->rcb_faddr = &route_src; 148 route_cb.any_count++; 149 soisconnected(so); 150 so->so_options |= SO_USELOOPBACK; 151 splx(s); 152 return 0; 153 } 154 155 static int 156 rts_bind(struct socket *so, struct sockaddr *nam, struct proc *p) 157 { 158 int s, error; 159 s = splnet(); 160 error = raw_usrreqs.pru_bind(so, nam, p); /* xxx just EINVAL */ 161 splx(s); 162 return error; 163 } 164 165 static int 166 rts_connect(struct socket *so, struct sockaddr *nam, struct proc *p) 167 { 168 int s, error; 169 s = splnet(); 170 error = raw_usrreqs.pru_connect(so, nam, p); /* XXX just EINVAL */ 171 splx(s); 172 return error; 173 } 174 175 /* pru_connect2 is EOPNOTSUPP */ 176 /* pru_control is EOPNOTSUPP */ 177 178 static int 179 rts_detach(struct socket *so) 180 { 181 struct rawcb *rp = sotorawcb(so); 182 int s, error; 183 184 s = splnet(); 185 if (rp != 0) { 186 switch(rp->rcb_proto.sp_protocol) { 187 case AF_INET: 188 route_cb.ip_count--; 189 break; 190 case AF_IPX: 191 route_cb.ipx_count--; 192 break; 193 case AF_NS: 194 route_cb.ns_count--; 195 break; 196 case AF_ISO: 197 route_cb.iso_count--; 198 break; 199 } 200 route_cb.any_count--; 201 } 202 error = raw_usrreqs.pru_detach(so); 203 splx(s); 204 return error; 205 } 206 207 static int 208 rts_disconnect(struct socket *so) 209 { 210 int s, error; 211 s = splnet(); 212 error = raw_usrreqs.pru_disconnect(so); 213 splx(s); 214 return error; 215 } 216 217 /* pru_listen is EOPNOTSUPP */ 218 219 static int 220 rts_peeraddr(struct socket *so, struct sockaddr **nam) 221 { 222 int s, error; 223 s = splnet(); 224 error = raw_usrreqs.pru_peeraddr(so, nam); 225 splx(s); 226 return error; 227 } 228 229 /* pru_rcvd is EOPNOTSUPP */ 230 /* pru_rcvoob is EOPNOTSUPP */ 231 232 static int 233 rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 234 struct mbuf *control, struct proc *p) 235 { 236 int s, error; 237 s = splnet(); 238 error = raw_usrreqs.pru_send(so, flags, m, nam, control, p); 239 splx(s); 240 return error; 241 } 242 243 /* pru_sense is null */ 244 245 static int 246 rts_shutdown(struct socket *so) 247 { 248 int s, error; 249 s = splnet(); 250 error = raw_usrreqs.pru_shutdown(so); 251 splx(s); 252 return error; 253 } 254 255 static int 256 rts_sockaddr(struct socket *so, struct sockaddr **nam) 257 { 258 int s, error; 259 s = splnet(); 260 error = raw_usrreqs.pru_sockaddr(so, nam); 261 splx(s); 262 return error; 263 } 264 265 static struct pr_usrreqs route_usrreqs = { 266 rts_abort, pru_accept_notsupp, rts_attach, rts_bind, rts_connect, 267 pru_connect2_notsupp, pru_control_notsupp, rts_detach, rts_disconnect, 268 pru_listen_notsupp, rts_peeraddr, pru_rcvd_notsupp, pru_rcvoob_notsupp, 269 rts_send, pru_sense_null, rts_shutdown, rts_sockaddr, 270 sosend, soreceive, sopoll 271 }; 272 273 /*ARGSUSED*/ 274 static int 275 route_output(m, so) 276 register struct mbuf *m; 277 struct socket *so; 278 { 279 register struct rt_msghdr *rtm = 0; 280 register struct rtentry *rt = 0; 281 struct rtentry *saved_nrt = 0; 282 struct radix_node_head *rnh; 283 struct rt_addrinfo info; 284 int len, error = 0; 285 struct ifnet *ifp = 0; 286 struct ifaddr *ifa = 0; 287 288 #define senderr(e) { error = e; goto flush;} 289 if (m == 0 || ((m->m_len < sizeof(long)) && 290 (m = m_pullup(m, sizeof(long))) == 0)) 291 return (ENOBUFS); 292 if ((m->m_flags & M_PKTHDR) == 0) 293 panic("route_output"); 294 len = m->m_pkthdr.len; 295 if (len < sizeof(*rtm) || 296 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 297 dst = 0; 298 senderr(EINVAL); 299 } 300 R_Malloc(rtm, struct rt_msghdr *, len); 301 if (rtm == 0) { 302 dst = 0; 303 senderr(ENOBUFS); 304 } 305 m_copydata(m, 0, len, (caddr_t)rtm); 306 if (rtm->rtm_version != RTM_VERSION) { 307 dst = 0; 308 senderr(EPROTONOSUPPORT); 309 } 310 rtm->rtm_pid = curproc->p_pid; 311 info.rti_addrs = rtm->rtm_addrs; 312 if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) { 313 dst = 0; 314 senderr(EINVAL); 315 } 316 if (dst == 0 || (dst->sa_family >= AF_MAX) 317 || (gate != 0 && (gate->sa_family >= AF_MAX))) 318 senderr(EINVAL); 319 if (genmask) { 320 struct radix_node *t; 321 t = rn_addmask((caddr_t)genmask, 0, 1); 322 if (t && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0) 323 genmask = (struct sockaddr *)(t->rn_key); 324 else 325 senderr(ENOBUFS); 326 } 327 switch (rtm->rtm_type) { 328 329 case RTM_ADD: 330 if (gate == 0) 331 senderr(EINVAL); 332 error = rtrequest(RTM_ADD, dst, gate, netmask, 333 rtm->rtm_flags, &saved_nrt); 334 if (error == 0 && saved_nrt) { 335 rt_setmetrics(rtm->rtm_inits, 336 &rtm->rtm_rmx, &saved_nrt->rt_rmx); 337 saved_nrt->rt_refcnt--; 338 saved_nrt->rt_genmask = genmask; 339 } 340 break; 341 342 case RTM_DELETE: 343 error = rtrequest(RTM_DELETE, dst, gate, netmask, 344 rtm->rtm_flags, &saved_nrt); 345 if (error == 0) { 346 if ((rt = saved_nrt)) 347 rt->rt_refcnt++; 348 goto report; 349 } 350 break; 351 352 case RTM_GET: 353 case RTM_CHANGE: 354 case RTM_LOCK: 355 if ((rnh = rt_tables[dst->sa_family]) == 0) { 356 senderr(EAFNOSUPPORT); 357 } else if (rt = (struct rtentry *) 358 rnh->rnh_lookup(dst, netmask, rnh)) 359 rt->rt_refcnt++; 360 else 361 senderr(ESRCH); 362 switch(rtm->rtm_type) { 363 364 case RTM_GET: 365 report: 366 dst = rt_key(rt); 367 gate = rt->rt_gateway; 368 netmask = rt_mask(rt); 369 genmask = rt->rt_genmask; 370 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 371 ifp = rt->rt_ifp; 372 if (ifp) { 373 ifpaddr = ifp->if_addrhead.tqh_first->ifa_addr; 374 ifaaddr = rt->rt_ifa->ifa_addr; 375 rtm->rtm_index = ifp->if_index; 376 } else { 377 ifpaddr = 0; 378 ifaaddr = 0; 379 } 380 } 381 len = rt_msg2(rtm->rtm_type, &info, (caddr_t)0, 382 (struct walkarg *)0); 383 if (len > rtm->rtm_msglen) { 384 struct rt_msghdr *new_rtm; 385 R_Malloc(new_rtm, struct rt_msghdr *, len); 386 if (new_rtm == 0) 387 senderr(ENOBUFS); 388 Bcopy(rtm, new_rtm, rtm->rtm_msglen); 389 Free(rtm); rtm = new_rtm; 390 } 391 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, 392 (struct walkarg *)0); 393 rtm->rtm_flags = rt->rt_flags; 394 rtm->rtm_rmx = rt->rt_rmx; 395 rtm->rtm_addrs = info.rti_addrs; 396 break; 397 398 case RTM_CHANGE: 399 if (gate && (error = rt_setgate(rt, rt_key(rt), gate))) 400 senderr(error); 401 402 /* 403 * If they tried to change things but didn't specify 404 * the required gateway, then just use the old one. 405 * This can happen if the user tries to change the 406 * flags on the default route without changing the 407 * default gateway. Changing flags still doesn't work. 408 */ 409 if ((rt->rt_flags & RTF_GATEWAY) && !gate) 410 gate = rt->rt_gateway; 411 412 /* new gateway could require new ifaddr, ifp; 413 flags may also be different; ifp may be specified 414 by ll sockaddr when protocol address is ambiguous */ 415 if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) && 416 (ifp = ifa->ifa_ifp) && (ifaaddr || gate)) 417 ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate, 418 ifp); 419 else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) || 420 (gate && (ifa = ifa_ifwithroute(rt->rt_flags, 421 rt_key(rt), gate)))) 422 ifp = ifa->ifa_ifp; 423 if (ifa) { 424 register struct ifaddr *oifa = rt->rt_ifa; 425 if (oifa != ifa) { 426 if (oifa && oifa->ifa_rtrequest) 427 oifa->ifa_rtrequest(RTM_DELETE, 428 rt, gate); 429 IFAFREE(rt->rt_ifa); 430 rt->rt_ifa = ifa; 431 ifa->ifa_refcnt++; 432 rt->rt_ifp = ifp; 433 } 434 } 435 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 436 &rt->rt_rmx); 437 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 438 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate); 439 if (genmask) 440 rt->rt_genmask = genmask; 441 /* 442 * Fall into 443 */ 444 case RTM_LOCK: 445 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 446 rt->rt_rmx.rmx_locks |= 447 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 448 break; 449 } 450 break; 451 452 default: 453 senderr(EOPNOTSUPP); 454 } 455 456 flush: 457 if (rtm) { 458 if (error) 459 rtm->rtm_errno = error; 460 else 461 rtm->rtm_flags |= RTF_DONE; 462 } 463 if (rt) 464 rtfree(rt); 465 { 466 register struct rawcb *rp = 0; 467 /* 468 * Check to see if we don't want our own messages. 469 */ 470 if ((so->so_options & SO_USELOOPBACK) == 0) { 471 if (route_cb.any_count <= 1) { 472 if (rtm) 473 Free(rtm); 474 m_freem(m); 475 return (error); 476 } 477 /* There is another listener, so construct message */ 478 rp = sotorawcb(so); 479 } 480 if (rtm) { 481 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 482 Free(rtm); 483 } 484 if (rp) 485 rp->rcb_proto.sp_family = 0; /* Avoid us */ 486 if (dst) 487 route_proto.sp_protocol = dst->sa_family; 488 raw_input(m, &route_proto, &route_src, &route_dst); 489 if (rp) 490 rp->rcb_proto.sp_family = PF_ROUTE; 491 } 492 return (error); 493 } 494 495 static void 496 rt_setmetrics(which, in, out) 497 u_long which; 498 register struct rt_metrics *in, *out; 499 { 500 #define metric(f, e) if (which & (f)) out->e = in->e; 501 metric(RTV_RPIPE, rmx_recvpipe); 502 metric(RTV_SPIPE, rmx_sendpipe); 503 metric(RTV_SSTHRESH, rmx_ssthresh); 504 metric(RTV_RTT, rmx_rtt); 505 metric(RTV_RTTVAR, rmx_rttvar); 506 metric(RTV_HOPCOUNT, rmx_hopcount); 507 metric(RTV_MTU, rmx_mtu); 508 metric(RTV_EXPIRE, rmx_expire); 509 #undef metric 510 } 511 512 #define ROUNDUP(a) \ 513 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 514 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 515 516 517 /* 518 * Extract the addresses of the passed sockaddrs. 519 * Do a little sanity checking so as to avoid bad memory references. 520 * This data is derived straight from userland. 521 */ 522 static int 523 rt_xaddrs(cp, cplim, rtinfo) 524 register caddr_t cp, cplim; 525 register struct rt_addrinfo *rtinfo; 526 { 527 register struct sockaddr *sa; 528 register int i; 529 530 bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info)); 531 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 532 if ((rtinfo->rti_addrs & (1 << i)) == 0) 533 continue; 534 sa = (struct sockaddr *)cp; 535 /* 536 * It won't fit. 537 */ 538 if ( (cp + sa->sa_len) > cplim ) { 539 return (EINVAL); 540 } 541 542 /* 543 * there are no more.. quit now 544 * If there are more bits, they are in error. 545 * I've seen this. route(1) can evidently generate these. 546 * This causes kernel to core dump. 547 * for compatibility, If we see this, point to a safe address. 548 */ 549 if (sa->sa_len == 0) { 550 rtinfo->rti_info[i] = &sa_zero; 551 return (0); /* should be EINVAL but for compat */ 552 } 553 554 /* accept it */ 555 rtinfo->rti_info[i] = sa; 556 ADVANCE(cp, sa); 557 } 558 return (0); 559 } 560 561 static struct mbuf * 562 rt_msg1(type, rtinfo) 563 int type; 564 register struct rt_addrinfo *rtinfo; 565 { 566 register struct rt_msghdr *rtm; 567 register struct mbuf *m; 568 register int i; 569 register struct sockaddr *sa; 570 int len, dlen; 571 572 m = m_gethdr(M_DONTWAIT, MT_DATA); 573 if (m == 0) 574 return (m); 575 switch (type) { 576 577 case RTM_DELADDR: 578 case RTM_NEWADDR: 579 len = sizeof(struct ifa_msghdr); 580 break; 581 582 case RTM_DELMADDR: 583 case RTM_NEWMADDR: 584 len = sizeof(struct ifma_msghdr); 585 break; 586 587 case RTM_IFINFO: 588 len = sizeof(struct if_msghdr); 589 break; 590 591 default: 592 len = sizeof(struct rt_msghdr); 593 } 594 if (len > MHLEN) 595 panic("rt_msg1"); 596 m->m_pkthdr.len = m->m_len = len; 597 m->m_pkthdr.rcvif = 0; 598 rtm = mtod(m, struct rt_msghdr *); 599 bzero((caddr_t)rtm, len); 600 for (i = 0; i < RTAX_MAX; i++) { 601 if ((sa = rtinfo->rti_info[i]) == NULL) 602 continue; 603 rtinfo->rti_addrs |= (1 << i); 604 dlen = ROUNDUP(sa->sa_len); 605 m_copyback(m, len, dlen, (caddr_t)sa); 606 len += dlen; 607 } 608 if (m->m_pkthdr.len != len) { 609 m_freem(m); 610 return (NULL); 611 } 612 rtm->rtm_msglen = len; 613 rtm->rtm_version = RTM_VERSION; 614 rtm->rtm_type = type; 615 return (m); 616 } 617 618 static int 619 rt_msg2(type, rtinfo, cp, w) 620 int type; 621 register struct rt_addrinfo *rtinfo; 622 caddr_t cp; 623 struct walkarg *w; 624 { 625 register int i; 626 int len, dlen, second_time = 0; 627 caddr_t cp0; 628 629 rtinfo->rti_addrs = 0; 630 again: 631 switch (type) { 632 633 case RTM_DELADDR: 634 case RTM_NEWADDR: 635 len = sizeof(struct ifa_msghdr); 636 break; 637 638 case RTM_IFINFO: 639 len = sizeof(struct if_msghdr); 640 break; 641 642 default: 643 len = sizeof(struct rt_msghdr); 644 } 645 cp0 = cp; 646 if (cp0) 647 cp += len; 648 for (i = 0; i < RTAX_MAX; i++) { 649 register struct sockaddr *sa; 650 651 if ((sa = rtinfo->rti_info[i]) == 0) 652 continue; 653 rtinfo->rti_addrs |= (1 << i); 654 dlen = ROUNDUP(sa->sa_len); 655 if (cp) { 656 bcopy((caddr_t)sa, cp, (unsigned)dlen); 657 cp += dlen; 658 } 659 len += dlen; 660 } 661 if (cp == 0 && w != NULL && !second_time) { 662 register struct walkarg *rw = w; 663 664 if (rw->w_req) { 665 if (rw->w_tmemsize < len) { 666 if (rw->w_tmem) 667 free(rw->w_tmem, M_RTABLE); 668 rw->w_tmem = (caddr_t) 669 malloc(len, M_RTABLE, M_NOWAIT); 670 if (rw->w_tmem) 671 rw->w_tmemsize = len; 672 } 673 if (rw->w_tmem) { 674 cp = rw->w_tmem; 675 second_time = 1; 676 goto again; 677 } 678 } 679 } 680 if (cp) { 681 register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 682 683 rtm->rtm_version = RTM_VERSION; 684 rtm->rtm_type = type; 685 rtm->rtm_msglen = len; 686 } 687 return (len); 688 } 689 690 /* 691 * This routine is called to generate a message from the routing 692 * socket indicating that a redirect has occured, a routing lookup 693 * has failed, or that a protocol has detected timeouts to a particular 694 * destination. 695 */ 696 void 697 rt_missmsg(type, rtinfo, flags, error) 698 int type, flags, error; 699 register struct rt_addrinfo *rtinfo; 700 { 701 register struct rt_msghdr *rtm; 702 register struct mbuf *m; 703 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 704 705 if (route_cb.any_count == 0) 706 return; 707 m = rt_msg1(type, rtinfo); 708 if (m == 0) 709 return; 710 rtm = mtod(m, struct rt_msghdr *); 711 rtm->rtm_flags = RTF_DONE | flags; 712 rtm->rtm_errno = error; 713 rtm->rtm_addrs = rtinfo->rti_addrs; 714 route_proto.sp_protocol = sa ? sa->sa_family : 0; 715 raw_input(m, &route_proto, &route_src, &route_dst); 716 } 717 718 /* 719 * This routine is called to generate a message from the routing 720 * socket indicating that the status of a network interface has changed. 721 */ 722 void 723 rt_ifmsg(ifp) 724 register struct ifnet *ifp; 725 { 726 register struct if_msghdr *ifm; 727 struct mbuf *m; 728 struct rt_addrinfo info; 729 730 if (route_cb.any_count == 0) 731 return; 732 bzero((caddr_t)&info, sizeof(info)); 733 m = rt_msg1(RTM_IFINFO, &info); 734 if (m == 0) 735 return; 736 ifm = mtod(m, struct if_msghdr *); 737 ifm->ifm_index = ifp->if_index; 738 ifm->ifm_flags = (u_short)ifp->if_flags; 739 ifm->ifm_data = ifp->if_data; 740 ifm->ifm_addrs = 0; 741 route_proto.sp_protocol = 0; 742 raw_input(m, &route_proto, &route_src, &route_dst); 743 } 744 745 /* 746 * This is called to generate messages from the routing socket 747 * indicating a network interface has had addresses associated with it. 748 * if we ever reverse the logic and replace messages TO the routing 749 * socket indicate a request to configure interfaces, then it will 750 * be unnecessary as the routing socket will automatically generate 751 * copies of it. 752 */ 753 void 754 rt_newaddrmsg(cmd, ifa, error, rt) 755 int cmd, error; 756 register struct ifaddr *ifa; 757 register struct rtentry *rt; 758 { 759 struct rt_addrinfo info; 760 struct sockaddr *sa = 0; 761 int pass; 762 struct mbuf *m = 0; 763 struct ifnet *ifp = ifa->ifa_ifp; 764 765 if (route_cb.any_count == 0) 766 return; 767 for (pass = 1; pass < 3; pass++) { 768 bzero((caddr_t)&info, sizeof(info)); 769 if ((cmd == RTM_ADD && pass == 1) || 770 (cmd == RTM_DELETE && pass == 2)) { 771 register struct ifa_msghdr *ifam; 772 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 773 774 ifaaddr = sa = ifa->ifa_addr; 775 ifpaddr = ifp->if_addrhead.tqh_first->ifa_addr; 776 netmask = ifa->ifa_netmask; 777 brdaddr = ifa->ifa_dstaddr; 778 if ((m = rt_msg1(ncmd, &info)) == NULL) 779 continue; 780 ifam = mtod(m, struct ifa_msghdr *); 781 ifam->ifam_index = ifp->if_index; 782 ifam->ifam_metric = ifa->ifa_metric; 783 ifam->ifam_flags = ifa->ifa_flags; 784 ifam->ifam_addrs = info.rti_addrs; 785 } 786 if ((cmd == RTM_ADD && pass == 2) || 787 (cmd == RTM_DELETE && pass == 1)) { 788 register struct rt_msghdr *rtm; 789 790 if (rt == 0) 791 continue; 792 netmask = rt_mask(rt); 793 dst = sa = rt_key(rt); 794 gate = rt->rt_gateway; 795 if ((m = rt_msg1(cmd, &info)) == NULL) 796 continue; 797 rtm = mtod(m, struct rt_msghdr *); 798 rtm->rtm_index = ifp->if_index; 799 rtm->rtm_flags |= rt->rt_flags; 800 rtm->rtm_errno = error; 801 rtm->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 the analogue to the rt_newaddrmsg which performs the same 810 * function but for multicast group memberhips. This is easier since 811 * there is no route state to worry about. 812 */ 813 void 814 rt_newmaddrmsg(cmd, ifma) 815 int cmd; 816 struct ifmultiaddr *ifma; 817 { 818 struct rt_addrinfo info; 819 struct mbuf *m = 0; 820 struct ifnet *ifp = ifma->ifma_ifp; 821 struct ifma_msghdr *ifmam; 822 823 if (route_cb.any_count == 0) 824 return; 825 826 bzero((caddr_t)&info, sizeof(info)); 827 ifaaddr = ifma->ifma_addr; 828 ifpaddr = ifp->if_addrhead.tqh_first->ifa_addr; 829 /* 830 * If a link-layer address is present, present it as a ``gateway'' 831 * (similarly to how ARP entries, e.g., are presented). 832 */ 833 gate = ifma->ifma_lladdr; 834 if ((m = rt_msg1(cmd, &info)) == NULL) 835 return; 836 ifmam = mtod(m, struct ifma_msghdr *); 837 ifmam->ifmam_index = ifp->if_index; 838 ifmam->ifmam_addrs = info.rti_addrs; 839 route_proto.sp_protocol = ifma->ifma_addr->sa_family; 840 raw_input(m, &route_proto, &route_src, &route_dst); 841 } 842 843 /* 844 * This is used in dumping the kernel table via sysctl(). 845 */ 846 int 847 sysctl_dumpentry(rn, vw) 848 struct radix_node *rn; 849 void *vw; 850 { 851 register struct walkarg *w = vw; 852 register struct rtentry *rt = (struct rtentry *)rn; 853 int error = 0, size; 854 struct rt_addrinfo info; 855 856 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 857 return 0; 858 bzero((caddr_t)&info, sizeof(info)); 859 dst = rt_key(rt); 860 gate = rt->rt_gateway; 861 netmask = rt_mask(rt); 862 genmask = rt->rt_genmask; 863 size = rt_msg2(RTM_GET, &info, 0, w); 864 if (w->w_req && w->w_tmem) { 865 register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 866 867 rtm->rtm_flags = rt->rt_flags; 868 rtm->rtm_use = rt->rt_use; 869 rtm->rtm_rmx = rt->rt_rmx; 870 rtm->rtm_index = rt->rt_ifp->if_index; 871 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 872 rtm->rtm_addrs = info.rti_addrs; 873 error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size); 874 return (error); 875 } 876 return (error); 877 } 878 879 int 880 sysctl_iflist(af, w) 881 int af; 882 register struct walkarg *w; 883 { 884 register struct ifnet *ifp; 885 register struct ifaddr *ifa; 886 struct rt_addrinfo info; 887 int len, error = 0; 888 889 bzero((caddr_t)&info, sizeof(info)); 890 for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_link.tqe_next) { 891 if (w->w_arg && w->w_arg != ifp->if_index) 892 continue; 893 ifa = ifp->if_addrhead.tqh_first; 894 ifpaddr = ifa->ifa_addr; 895 len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w); 896 ifpaddr = 0; 897 if (w->w_req && w->w_tmem) { 898 register struct if_msghdr *ifm; 899 900 ifm = (struct if_msghdr *)w->w_tmem; 901 ifm->ifm_index = ifp->if_index; 902 ifm->ifm_flags = (u_short)ifp->if_flags; 903 ifm->ifm_data = ifp->if_data; 904 ifm->ifm_addrs = info.rti_addrs; 905 error = SYSCTL_OUT(w->w_req,(caddr_t)ifm, len); 906 if (error) 907 return (error); 908 } 909 while ((ifa = ifa->ifa_link.tqe_next) != 0) { 910 if (af && af != ifa->ifa_addr->sa_family) 911 continue; 912 ifaaddr = ifa->ifa_addr; 913 netmask = ifa->ifa_netmask; 914 brdaddr = ifa->ifa_dstaddr; 915 len = rt_msg2(RTM_NEWADDR, &info, 0, w); 916 if (w->w_req && w->w_tmem) { 917 register struct ifa_msghdr *ifam; 918 919 ifam = (struct ifa_msghdr *)w->w_tmem; 920 ifam->ifam_index = ifa->ifa_ifp->if_index; 921 ifam->ifam_flags = ifa->ifa_flags; 922 ifam->ifam_metric = ifa->ifa_metric; 923 ifam->ifam_addrs = info.rti_addrs; 924 error = SYSCTL_OUT(w->w_req, w->w_tmem, len); 925 if (error) 926 return (error); 927 } 928 } 929 ifaaddr = netmask = brdaddr = 0; 930 } 931 return (0); 932 } 933 934 static int 935 sysctl_rtsock SYSCTL_HANDLER_ARGS 936 { 937 int *name = (int *)arg1; 938 u_int namelen = arg2; 939 register struct radix_node_head *rnh; 940 int i, s, error = EINVAL; 941 u_char af; 942 struct walkarg w; 943 944 name ++; 945 namelen--; 946 if (req->newptr) 947 return (EPERM); 948 if (namelen != 3) 949 return (EINVAL); 950 af = name[0]; 951 Bzero(&w, sizeof(w)); 952 w.w_op = name[1]; 953 w.w_arg = name[2]; 954 w.w_req = req; 955 956 s = splnet(); 957 switch (w.w_op) { 958 959 case NET_RT_DUMP: 960 case NET_RT_FLAGS: 961 for (i = 1; i <= AF_MAX; i++) 962 if ((rnh = rt_tables[i]) && (af == 0 || af == i) && 963 (error = rnh->rnh_walktree(rnh, 964 sysctl_dumpentry, &w))) 965 break; 966 break; 967 968 case NET_RT_IFLIST: 969 error = sysctl_iflist(af, &w); 970 } 971 splx(s); 972 if (w.w_tmem) 973 free(w.w_tmem, M_RTABLE); 974 return (error); 975 } 976 977 SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, ""); 978 979 /* 980 * Definitions of protocols supported in the ROUTE domain. 981 */ 982 983 extern struct domain routedomain; /* or at least forward */ 984 985 static struct protosw routesw[] = { 986 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 987 0, route_output, raw_ctlinput, 0, 988 0, 989 raw_init, 0, 0, 0, 990 &route_usrreqs 991 } 992 }; 993 994 static struct domain routedomain = 995 { PF_ROUTE, "route", route_init, 0, 0, 996 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 997 998 DOMAIN_SET(route); 999