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 * $FreeBSD$ 35 */ 36 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/kernel.h> 41 #include <sys/sysctl.h> 42 #include <sys/proc.h> 43 #include <sys/malloc.h> 44 #include <sys/mbuf.h> 45 #include <sys/socket.h> 46 #include <sys/socketvar.h> 47 #include <sys/domain.h> 48 #include <sys/protosw.h> 49 #include <sys/jail.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 /* XXX */ 113 MALLOC(rp, struct rawcb *, sizeof *rp, M_PCB, M_WAITOK | M_ZERO); 114 if (rp == 0) 115 return ENOBUFS; 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_INET6: 138 route_cb.ip6_count++; 139 break; 140 case AF_IPX: 141 route_cb.ipx_count++; 142 break; 143 case AF_NS: 144 route_cb.ns_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_INET6: 191 route_cb.ip6_count--; 192 break; 193 case AF_IPX: 194 route_cb.ipx_count--; 195 break; 196 case AF_NS: 197 route_cb.ns_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((caddr_t *)genmask + 1, (caddr_t *)t->rn_key + 1, 323 *(u_char *)t->rn_key - 1) == 0) 324 genmask = (struct sockaddr *)(t->rn_key); 325 else 326 senderr(ENOBUFS); 327 } 328 switch (rtm->rtm_type) { 329 330 case RTM_ADD: 331 if (gate == 0) 332 senderr(EINVAL); 333 error = rtrequest(RTM_ADD, dst, gate, netmask, 334 rtm->rtm_flags, &saved_nrt); 335 if (error == 0 && saved_nrt) { 336 rt_setmetrics(rtm->rtm_inits, 337 &rtm->rtm_rmx, &saved_nrt->rt_rmx); 338 saved_nrt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 339 saved_nrt->rt_rmx.rmx_locks |= 340 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 341 saved_nrt->rt_refcnt--; 342 saved_nrt->rt_genmask = genmask; 343 } 344 break; 345 346 case RTM_DELETE: 347 error = rtrequest(RTM_DELETE, dst, gate, netmask, 348 rtm->rtm_flags, &saved_nrt); 349 if (error == 0) { 350 if ((rt = saved_nrt)) 351 rt->rt_refcnt++; 352 goto report; 353 } 354 break; 355 356 case RTM_GET: 357 case RTM_CHANGE: 358 case RTM_LOCK: 359 if ((rnh = rt_tables[dst->sa_family]) == 0) { 360 senderr(EAFNOSUPPORT); 361 } else if ((rt = (struct rtentry *) 362 rnh->rnh_lookup(dst, netmask, rnh)) != NULL) 363 rt->rt_refcnt++; 364 else 365 senderr(ESRCH); 366 switch(rtm->rtm_type) { 367 368 case RTM_GET: 369 report: 370 dst = rt_key(rt); 371 gate = rt->rt_gateway; 372 netmask = rt_mask(rt); 373 genmask = rt->rt_genmask; 374 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 375 ifp = rt->rt_ifp; 376 if (ifp) { 377 ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr; 378 ifaaddr = rt->rt_ifa->ifa_addr; 379 rtm->rtm_index = ifp->if_index; 380 } else { 381 ifpaddr = 0; 382 ifaaddr = 0; 383 } 384 } 385 len = rt_msg2(rtm->rtm_type, &info, (caddr_t)0, 386 (struct walkarg *)0); 387 if (len > rtm->rtm_msglen) { 388 struct rt_msghdr *new_rtm; 389 R_Malloc(new_rtm, struct rt_msghdr *, len); 390 if (new_rtm == 0) 391 senderr(ENOBUFS); 392 Bcopy(rtm, new_rtm, rtm->rtm_msglen); 393 Free(rtm); rtm = new_rtm; 394 } 395 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, 396 (struct walkarg *)0); 397 rtm->rtm_flags = rt->rt_flags; 398 rtm->rtm_rmx = rt->rt_rmx; 399 rtm->rtm_addrs = info.rti_addrs; 400 break; 401 402 case RTM_CHANGE: 403 if (gate && (error = rt_setgate(rt, rt_key(rt), gate))) 404 senderr(error); 405 406 /* 407 * If they tried to change things but didn't specify 408 * the required gateway, then just use the old one. 409 * This can happen if the user tries to change the 410 * flags on the default route without changing the 411 * default gateway. Changing flags still doesn't work. 412 */ 413 if ((rt->rt_flags & RTF_GATEWAY) && !gate) 414 gate = rt->rt_gateway; 415 416 /* new gateway could require new ifaddr, ifp; 417 flags may also be different; ifp may be specified 418 by ll sockaddr when protocol address is ambiguous */ 419 if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) && 420 (ifp = ifa->ifa_ifp) && (ifaaddr || gate)) 421 ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate, 422 ifp); 423 else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) || 424 (gate && (ifa = ifa_ifwithroute(rt->rt_flags, 425 rt_key(rt), gate)))) 426 ifp = ifa->ifa_ifp; 427 if (ifa) { 428 register struct ifaddr *oifa = rt->rt_ifa; 429 if (oifa != ifa) { 430 if (oifa && oifa->ifa_rtrequest) 431 oifa->ifa_rtrequest(RTM_DELETE, 432 rt, gate); 433 IFAFREE(rt->rt_ifa); 434 rt->rt_ifa = ifa; 435 ifa->ifa_refcnt++; 436 rt->rt_ifp = ifp; 437 } 438 } 439 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 440 &rt->rt_rmx); 441 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 442 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate); 443 if (genmask) 444 rt->rt_genmask = genmask; 445 /* 446 * Fall into 447 */ 448 case RTM_LOCK: 449 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 450 rt->rt_rmx.rmx_locks |= 451 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 452 break; 453 } 454 break; 455 456 default: 457 senderr(EOPNOTSUPP); 458 } 459 460 flush: 461 if (rtm) { 462 if (error) 463 rtm->rtm_errno = error; 464 else 465 rtm->rtm_flags |= RTF_DONE; 466 } 467 if (rt) 468 rtfree(rt); 469 { 470 register struct rawcb *rp = 0; 471 /* 472 * Check to see if we don't want our own messages. 473 */ 474 if ((so->so_options & SO_USELOOPBACK) == 0) { 475 if (route_cb.any_count <= 1) { 476 if (rtm) 477 Free(rtm); 478 m_freem(m); 479 return (error); 480 } 481 /* There is another listener, so construct message */ 482 rp = sotorawcb(so); 483 } 484 if (rtm) { 485 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 486 Free(rtm); 487 } 488 if (rp) 489 rp->rcb_proto.sp_family = 0; /* Avoid us */ 490 if (dst) 491 route_proto.sp_protocol = dst->sa_family; 492 raw_input(m, &route_proto, &route_src, &route_dst); 493 if (rp) 494 rp->rcb_proto.sp_family = PF_ROUTE; 495 } 496 return (error); 497 } 498 499 static void 500 rt_setmetrics(which, in, out) 501 u_long which; 502 register struct rt_metrics *in, *out; 503 { 504 #define metric(f, e) if (which & (f)) out->e = in->e; 505 metric(RTV_RPIPE, rmx_recvpipe); 506 metric(RTV_SPIPE, rmx_sendpipe); 507 metric(RTV_SSTHRESH, rmx_ssthresh); 508 metric(RTV_RTT, rmx_rtt); 509 metric(RTV_RTTVAR, rmx_rttvar); 510 metric(RTV_HOPCOUNT, rmx_hopcount); 511 metric(RTV_MTU, rmx_mtu); 512 metric(RTV_EXPIRE, rmx_expire); 513 #undef metric 514 } 515 516 #define ROUNDUP(a) \ 517 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 518 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 519 520 521 /* 522 * Extract the addresses of the passed sockaddrs. 523 * Do a little sanity checking so as to avoid bad memory references. 524 * This data is derived straight from userland. 525 */ 526 static int 527 rt_xaddrs(cp, cplim, rtinfo) 528 register caddr_t cp, cplim; 529 register struct rt_addrinfo *rtinfo; 530 { 531 register struct sockaddr *sa; 532 register int i; 533 534 bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info)); 535 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 536 if ((rtinfo->rti_addrs & (1 << i)) == 0) 537 continue; 538 sa = (struct sockaddr *)cp; 539 /* 540 * It won't fit. 541 */ 542 if ( (cp + sa->sa_len) > cplim ) { 543 return (EINVAL); 544 } 545 546 /* 547 * there are no more.. quit now 548 * If there are more bits, they are in error. 549 * I've seen this. route(1) can evidently generate these. 550 * This causes kernel to core dump. 551 * for compatibility, If we see this, point to a safe address. 552 */ 553 if (sa->sa_len == 0) { 554 rtinfo->rti_info[i] = &sa_zero; 555 return (0); /* should be EINVAL but for compat */ 556 } 557 558 /* accept it */ 559 rtinfo->rti_info[i] = sa; 560 ADVANCE(cp, sa); 561 } 562 return (0); 563 } 564 565 static struct mbuf * 566 rt_msg1(type, rtinfo) 567 int type; 568 register struct rt_addrinfo *rtinfo; 569 { 570 register struct rt_msghdr *rtm; 571 register struct mbuf *m; 572 register int i; 573 register struct sockaddr *sa; 574 int len, dlen; 575 576 m = m_gethdr(M_DONTWAIT, MT_DATA); 577 if (m == 0) 578 return (m); 579 switch (type) { 580 581 case RTM_DELADDR: 582 case RTM_NEWADDR: 583 len = sizeof(struct ifa_msghdr); 584 break; 585 586 case RTM_DELMADDR: 587 case RTM_NEWMADDR: 588 len = sizeof(struct ifma_msghdr); 589 break; 590 591 case RTM_IFINFO: 592 len = sizeof(struct if_msghdr); 593 break; 594 595 default: 596 len = sizeof(struct rt_msghdr); 597 } 598 if (len > MHLEN) 599 panic("rt_msg1"); 600 m->m_pkthdr.len = m->m_len = len; 601 m->m_pkthdr.rcvif = 0; 602 rtm = mtod(m, struct rt_msghdr *); 603 bzero((caddr_t)rtm, len); 604 for (i = 0; i < RTAX_MAX; i++) { 605 if ((sa = rtinfo->rti_info[i]) == NULL) 606 continue; 607 rtinfo->rti_addrs |= (1 << i); 608 dlen = ROUNDUP(sa->sa_len); 609 m_copyback(m, len, dlen, (caddr_t)sa); 610 len += dlen; 611 } 612 if (m->m_pkthdr.len != len) { 613 m_freem(m); 614 return (NULL); 615 } 616 rtm->rtm_msglen = len; 617 rtm->rtm_version = RTM_VERSION; 618 rtm->rtm_type = type; 619 return (m); 620 } 621 622 static int 623 rt_msg2(type, rtinfo, cp, w) 624 int type; 625 register struct rt_addrinfo *rtinfo; 626 caddr_t cp; 627 struct walkarg *w; 628 { 629 register int i; 630 int len, dlen, second_time = 0; 631 caddr_t cp0; 632 633 rtinfo->rti_addrs = 0; 634 again: 635 switch (type) { 636 637 case RTM_DELADDR: 638 case RTM_NEWADDR: 639 len = sizeof(struct ifa_msghdr); 640 break; 641 642 case RTM_IFINFO: 643 len = sizeof(struct if_msghdr); 644 break; 645 646 default: 647 len = sizeof(struct rt_msghdr); 648 } 649 cp0 = cp; 650 if (cp0) 651 cp += len; 652 for (i = 0; i < RTAX_MAX; i++) { 653 register struct sockaddr *sa; 654 655 if ((sa = rtinfo->rti_info[i]) == 0) 656 continue; 657 rtinfo->rti_addrs |= (1 << i); 658 dlen = ROUNDUP(sa->sa_len); 659 if (cp) { 660 bcopy((caddr_t)sa, cp, (unsigned)dlen); 661 cp += dlen; 662 } 663 len += dlen; 664 } 665 if (cp == 0 && w != NULL && !second_time) { 666 register struct walkarg *rw = w; 667 668 if (rw->w_req) { 669 if (rw->w_tmemsize < len) { 670 if (rw->w_tmem) 671 free(rw->w_tmem, M_RTABLE); 672 rw->w_tmem = (caddr_t) 673 malloc(len, M_RTABLE, M_NOWAIT); 674 if (rw->w_tmem) 675 rw->w_tmemsize = len; 676 } 677 if (rw->w_tmem) { 678 cp = rw->w_tmem; 679 second_time = 1; 680 goto again; 681 } 682 } 683 } 684 if (cp) { 685 register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 686 687 rtm->rtm_version = RTM_VERSION; 688 rtm->rtm_type = type; 689 rtm->rtm_msglen = len; 690 } 691 return (len); 692 } 693 694 /* 695 * This routine is called to generate a message from the routing 696 * socket indicating that a redirect has occured, a routing lookup 697 * has failed, or that a protocol has detected timeouts to a particular 698 * destination. 699 */ 700 void 701 rt_missmsg(type, rtinfo, flags, error) 702 int type, flags, error; 703 register struct rt_addrinfo *rtinfo; 704 { 705 register struct rt_msghdr *rtm; 706 register struct mbuf *m; 707 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 708 709 if (route_cb.any_count == 0) 710 return; 711 m = rt_msg1(type, rtinfo); 712 if (m == 0) 713 return; 714 rtm = mtod(m, struct rt_msghdr *); 715 rtm->rtm_flags = RTF_DONE | flags; 716 rtm->rtm_errno = error; 717 rtm->rtm_addrs = rtinfo->rti_addrs; 718 route_proto.sp_protocol = sa ? sa->sa_family : 0; 719 raw_input(m, &route_proto, &route_src, &route_dst); 720 } 721 722 /* 723 * This routine is called to generate a message from the routing 724 * socket indicating that the status of a network interface has changed. 725 */ 726 void 727 rt_ifmsg(ifp) 728 register struct ifnet *ifp; 729 { 730 register struct if_msghdr *ifm; 731 struct mbuf *m; 732 struct rt_addrinfo info; 733 734 if (route_cb.any_count == 0) 735 return; 736 bzero((caddr_t)&info, sizeof(info)); 737 m = rt_msg1(RTM_IFINFO, &info); 738 if (m == 0) 739 return; 740 ifm = mtod(m, struct if_msghdr *); 741 ifm->ifm_index = ifp->if_index; 742 ifm->ifm_flags = (u_short)ifp->if_flags; 743 ifm->ifm_data = ifp->if_data; 744 ifm->ifm_addrs = 0; 745 route_proto.sp_protocol = 0; 746 raw_input(m, &route_proto, &route_src, &route_dst); 747 } 748 749 /* 750 * This is called to generate messages from the routing socket 751 * indicating a network interface has had addresses associated with it. 752 * if we ever reverse the logic and replace messages TO the routing 753 * socket indicate a request to configure interfaces, then it will 754 * be unnecessary as the routing socket will automatically generate 755 * copies of it. 756 */ 757 void 758 rt_newaddrmsg(cmd, ifa, error, rt) 759 int cmd, error; 760 register struct ifaddr *ifa; 761 register struct rtentry *rt; 762 { 763 struct rt_addrinfo info; 764 struct sockaddr *sa = 0; 765 int pass; 766 struct mbuf *m = 0; 767 struct ifnet *ifp = ifa->ifa_ifp; 768 769 if (route_cb.any_count == 0) 770 return; 771 for (pass = 1; pass < 3; pass++) { 772 bzero((caddr_t)&info, sizeof(info)); 773 if ((cmd == RTM_ADD && pass == 1) || 774 (cmd == RTM_DELETE && pass == 2)) { 775 register struct ifa_msghdr *ifam; 776 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 777 778 ifaaddr = sa = ifa->ifa_addr; 779 ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr; 780 netmask = ifa->ifa_netmask; 781 brdaddr = ifa->ifa_dstaddr; 782 if ((m = rt_msg1(ncmd, &info)) == NULL) 783 continue; 784 ifam = mtod(m, struct ifa_msghdr *); 785 ifam->ifam_index = ifp->if_index; 786 ifam->ifam_metric = ifa->ifa_metric; 787 ifam->ifam_flags = ifa->ifa_flags; 788 ifam->ifam_addrs = info.rti_addrs; 789 } 790 if ((cmd == RTM_ADD && pass == 2) || 791 (cmd == RTM_DELETE && pass == 1)) { 792 register struct rt_msghdr *rtm; 793 794 if (rt == 0) 795 continue; 796 netmask = rt_mask(rt); 797 dst = sa = rt_key(rt); 798 gate = rt->rt_gateway; 799 if ((m = rt_msg1(cmd, &info)) == NULL) 800 continue; 801 rtm = mtod(m, struct rt_msghdr *); 802 rtm->rtm_index = ifp->if_index; 803 rtm->rtm_flags |= rt->rt_flags; 804 rtm->rtm_errno = error; 805 rtm->rtm_addrs = info.rti_addrs; 806 } 807 route_proto.sp_protocol = sa ? sa->sa_family : 0; 808 raw_input(m, &route_proto, &route_src, &route_dst); 809 } 810 } 811 812 /* 813 * This is the analogue to the rt_newaddrmsg which performs the same 814 * function but for multicast group memberhips. This is easier since 815 * there is no route state to worry about. 816 */ 817 void 818 rt_newmaddrmsg(cmd, ifma) 819 int cmd; 820 struct ifmultiaddr *ifma; 821 { 822 struct rt_addrinfo info; 823 struct mbuf *m = 0; 824 struct ifnet *ifp = ifma->ifma_ifp; 825 struct ifma_msghdr *ifmam; 826 827 if (route_cb.any_count == 0) 828 return; 829 830 bzero((caddr_t)&info, sizeof(info)); 831 ifaaddr = ifma->ifma_addr; 832 if (ifp && TAILQ_FIRST(&ifp->if_addrhead)) 833 ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr; 834 else 835 ifpaddr = NULL; 836 /* 837 * If a link-layer address is present, present it as a ``gateway'' 838 * (similarly to how ARP entries, e.g., are presented). 839 */ 840 gate = ifma->ifma_lladdr; 841 if ((m = rt_msg1(cmd, &info)) == NULL) 842 return; 843 ifmam = mtod(m, struct ifma_msghdr *); 844 ifmam->ifmam_index = ifp->if_index; 845 ifmam->ifmam_addrs = info.rti_addrs; 846 route_proto.sp_protocol = ifma->ifma_addr->sa_family; 847 raw_input(m, &route_proto, &route_src, &route_dst); 848 } 849 850 /* 851 * This is used in dumping the kernel table via sysctl(). 852 */ 853 int 854 sysctl_dumpentry(rn, vw) 855 struct radix_node *rn; 856 void *vw; 857 { 858 register struct walkarg *w = vw; 859 register struct rtentry *rt = (struct rtentry *)rn; 860 int error = 0, size; 861 struct rt_addrinfo info; 862 863 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 864 return 0; 865 bzero((caddr_t)&info, sizeof(info)); 866 dst = rt_key(rt); 867 gate = rt->rt_gateway; 868 netmask = rt_mask(rt); 869 genmask = rt->rt_genmask; 870 size = rt_msg2(RTM_GET, &info, 0, w); 871 if (w->w_req && w->w_tmem) { 872 register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 873 874 rtm->rtm_flags = rt->rt_flags; 875 rtm->rtm_use = rt->rt_use; 876 rtm->rtm_rmx = rt->rt_rmx; 877 rtm->rtm_index = rt->rt_ifp->if_index; 878 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 879 rtm->rtm_addrs = info.rti_addrs; 880 error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size); 881 return (error); 882 } 883 return (error); 884 } 885 886 int 887 sysctl_iflist(af, w) 888 int af; 889 register struct walkarg *w; 890 { 891 register struct ifnet *ifp; 892 register struct ifaddr *ifa; 893 struct rt_addrinfo info; 894 int len, error = 0; 895 896 bzero((caddr_t)&info, sizeof(info)); 897 TAILQ_FOREACH(ifp, &ifnet, if_link) { 898 if (w->w_arg && w->w_arg != ifp->if_index) 899 continue; 900 ifa = TAILQ_FIRST(&ifp->if_addrhead); 901 ifpaddr = ifa->ifa_addr; 902 len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w); 903 ifpaddr = 0; 904 if (w->w_req && w->w_tmem) { 905 register struct if_msghdr *ifm; 906 907 ifm = (struct if_msghdr *)w->w_tmem; 908 ifm->ifm_index = ifp->if_index; 909 ifm->ifm_flags = (u_short)ifp->if_flags; 910 ifm->ifm_data = ifp->if_data; 911 ifm->ifm_addrs = info.rti_addrs; 912 error = SYSCTL_OUT(w->w_req,(caddr_t)ifm, len); 913 if (error) 914 return (error); 915 } 916 while ((ifa = TAILQ_NEXT(ifa, ifa_link)) != 0) { 917 if (af && af != ifa->ifa_addr->sa_family) 918 continue; 919 if (jailed(curproc->p_ucred) && 920 prison_if(curproc->p_ucred, ifa->ifa_addr)) 921 continue; 922 ifaaddr = ifa->ifa_addr; 923 netmask = ifa->ifa_netmask; 924 brdaddr = ifa->ifa_dstaddr; 925 len = rt_msg2(RTM_NEWADDR, &info, 0, w); 926 if (w->w_req && w->w_tmem) { 927 register struct ifa_msghdr *ifam; 928 929 ifam = (struct ifa_msghdr *)w->w_tmem; 930 ifam->ifam_index = ifa->ifa_ifp->if_index; 931 ifam->ifam_flags = ifa->ifa_flags; 932 ifam->ifam_metric = ifa->ifa_metric; 933 ifam->ifam_addrs = info.rti_addrs; 934 error = SYSCTL_OUT(w->w_req, w->w_tmem, len); 935 if (error) 936 return (error); 937 } 938 } 939 ifaaddr = netmask = brdaddr = 0; 940 } 941 return (0); 942 } 943 944 static int 945 sysctl_rtsock(SYSCTL_HANDLER_ARGS) 946 { 947 int *name = (int *)arg1; 948 u_int namelen = arg2; 949 register struct radix_node_head *rnh; 950 int i, s, error = EINVAL; 951 u_char af; 952 struct walkarg w; 953 954 name ++; 955 namelen--; 956 if (req->newptr) 957 return (EPERM); 958 if (namelen != 3) 959 return (EINVAL); 960 af = name[0]; 961 Bzero(&w, sizeof(w)); 962 w.w_op = name[1]; 963 w.w_arg = name[2]; 964 w.w_req = req; 965 966 s = splnet(); 967 switch (w.w_op) { 968 969 case NET_RT_DUMP: 970 case NET_RT_FLAGS: 971 for (i = 1; i <= AF_MAX; i++) 972 if ((rnh = rt_tables[i]) && (af == 0 || af == i) && 973 (error = rnh->rnh_walktree(rnh, 974 sysctl_dumpentry, &w))) 975 break; 976 break; 977 978 case NET_RT_IFLIST: 979 error = sysctl_iflist(af, &w); 980 } 981 splx(s); 982 if (w.w_tmem) 983 free(w.w_tmem, M_RTABLE); 984 return (error); 985 } 986 987 SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, ""); 988 989 /* 990 * Definitions of protocols supported in the ROUTE domain. 991 */ 992 993 extern struct domain routedomain; /* or at least forward */ 994 995 static struct protosw routesw[] = { 996 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 997 0, route_output, raw_ctlinput, 0, 998 0, 999 raw_init, 0, 0, 0, 1000 &route_usrreqs 1001 } 1002 }; 1003 1004 static struct domain routedomain = 1005 { PF_ROUTE, "route", 0, 0, 0, 1006 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 1007 1008 DOMAIN_SET(route); 1009