57 58MALLOC_DEFINE(M_RTABLE, "routetbl", "routing tables"); 59 60static struct sockaddr route_dst = { 2, PF_ROUTE, }; 61static struct sockaddr route_src = { 2, PF_ROUTE, }; 62static struct sockaddr sa_zero = { sizeof(sa_zero), AF_INET, }; 63static struct sockproto route_proto = { PF_ROUTE, }; 64 65struct walkarg { 66 int w_tmemsize; 67 int w_op, w_arg; 68 caddr_t w_tmem; 69 struct sysctl_req *w_req; 70}; 71 72static struct mbuf * 73 rt_msg1(int, struct rt_addrinfo *); 74static int rt_msg2(int, struct rt_addrinfo *, caddr_t, struct walkarg *); 75static int rt_xaddrs(caddr_t, caddr_t, struct rt_addrinfo *); 76static int sysctl_dumpentry(struct radix_node *rn, void *vw); 77static int sysctl_iflist(int af, struct walkarg *w); 78static int route_output(struct mbuf *, struct socket *); 79static void rt_setmetrics(u_long, struct rt_metrics *, struct rt_metrics *); 80 81/* Sleazy use of local variables throughout file, warning!!!! */ 82#define dst info.rti_info[RTAX_DST] 83#define gate info.rti_info[RTAX_GATEWAY] 84#define netmask info.rti_info[RTAX_NETMASK] 85#define genmask info.rti_info[RTAX_GENMASK] 86#define ifpaddr info.rti_info[RTAX_IFP] 87#define ifaaddr info.rti_info[RTAX_IFA] 88#define brdaddr info.rti_info[RTAX_BRD] 89 90/* 91 * It really doesn't make any sense at all for this code to share much 92 * with raw_usrreq.c, since its functionality is so restricted. XXX 93 */ 94static int 95rts_abort(struct socket *so) 96{ 97 int s, error; 98 s = splnet(); 99 error = raw_usrreqs.pru_abort(so); 100 splx(s); 101 return error; 102} 103 104/* pru_accept is EOPNOTSUPP */ 105 106static int 107rts_attach(struct socket *so, int proto, struct thread *td) 108{ 109 struct rawcb *rp; 110 int s, error; 111 112 if (sotorawcb(so) != 0) 113 return EISCONN; /* XXX panic? */ 114 /* XXX */ 115 MALLOC(rp, struct rawcb *, sizeof *rp, M_PCB, M_WAITOK | M_ZERO); 116 if (rp == 0) 117 return ENOBUFS; 118 119 /* 120 * The splnet() is necessary to block protocols from sending 121 * error notifications (like RTM_REDIRECT or RTM_LOSING) while 122 * this PCB is extant but incompletely initialized. 123 * Probably we should try to do more of this work beforehand and 124 * eliminate the spl. 125 */ 126 s = splnet(); 127 so->so_pcb = (caddr_t)rp; 128 error = raw_attach(so, proto); 129 rp = sotorawcb(so); 130 if (error) { 131 splx(s); 132 so->so_pcb = NULL; 133 free(rp, M_PCB); 134 return error; 135 } 136 switch(rp->rcb_proto.sp_protocol) { 137 case AF_INET: 138 route_cb.ip_count++; 139 break; 140 case AF_INET6: 141 route_cb.ip6_count++; 142 break; 143 case AF_IPX: 144 route_cb.ipx_count++; 145 break; 146 case AF_NS: 147 route_cb.ns_count++; 148 break; 149 } 150 rp->rcb_faddr = &route_src; 151 route_cb.any_count++; 152 SIGIO_SLOCK(); 153 soisconnected_locked(so); 154 so->so_options |= SO_USELOOPBACK; 155 SIGIO_SUNLOCK(); 156 splx(s); 157 return 0; 158} 159 160static int 161rts_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 162{ 163 int s, error; 164 s = splnet(); 165 error = raw_usrreqs.pru_bind(so, nam, td); /* xxx just EINVAL */ 166 splx(s); 167 return error; 168} 169 170static int 171rts_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 172{ 173 int s, error; 174 s = splnet(); 175 error = raw_usrreqs.pru_connect(so, nam, td); /* XXX just EINVAL */ 176 splx(s); 177 return error; 178} 179 180/* pru_connect2 is EOPNOTSUPP */ 181/* pru_control is EOPNOTSUPP */ 182 183static int 184rts_detach(struct socket *so) 185{ 186 struct rawcb *rp = sotorawcb(so); 187 int s, error; 188 189 s = splnet(); 190 if (rp != 0) { 191 switch(rp->rcb_proto.sp_protocol) { 192 case AF_INET: 193 route_cb.ip_count--; 194 break; 195 case AF_INET6: 196 route_cb.ip6_count--; 197 break; 198 case AF_IPX: 199 route_cb.ipx_count--; 200 break; 201 case AF_NS: 202 route_cb.ns_count--; 203 break; 204 } 205 route_cb.any_count--; 206 } 207 error = raw_usrreqs.pru_detach(so); 208 splx(s); 209 return error; 210} 211 212static int 213rts_disconnect(struct socket *so) 214{ 215 int s, error; 216 s = splnet(); 217 error = raw_usrreqs.pru_disconnect(so); 218 splx(s); 219 return error; 220} 221 222/* pru_listen is EOPNOTSUPP */ 223 224static int 225rts_peeraddr(struct socket *so, struct sockaddr **nam) 226{ 227 int s, error; 228 s = splnet(); 229 error = raw_usrreqs.pru_peeraddr(so, nam); 230 splx(s); 231 return error; 232} 233 234/* pru_rcvd is EOPNOTSUPP */ 235/* pru_rcvoob is EOPNOTSUPP */ 236 237static int 238rts_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam, 239 struct mbuf *control, struct thread *td) 240{ 241 int s, error; 242 s = splnet(); 243 error = raw_usrreqs.pru_send(so, flags, m, nam, control, td); 244 splx(s); 245 return error; 246} 247 248/* pru_sense is null */ 249 250static int 251rts_shutdown(struct socket *so) 252{ 253 int s, error; 254 s = splnet(); 255 error = raw_usrreqs.pru_shutdown(so); 256 splx(s); 257 return error; 258} 259 260static int 261rts_sockaddr(struct socket *so, struct sockaddr **nam) 262{ 263 int s, error; 264 s = splnet(); 265 error = raw_usrreqs.pru_sockaddr(so, nam); 266 splx(s); 267 return error; 268} 269 270static struct pr_usrreqs route_usrreqs = { 271 rts_abort, pru_accept_notsupp, rts_attach, rts_bind, rts_connect, 272 pru_connect2_notsupp, pru_control_notsupp, rts_detach, rts_disconnect, 273 pru_listen_notsupp, rts_peeraddr, pru_rcvd_notsupp, pru_rcvoob_notsupp, 274 rts_send, pru_sense_null, rts_shutdown, rts_sockaddr, 275 sosend, soreceive, sopoll 276}; 277 278/*ARGSUSED*/ 279static int 280route_output(m, so) 281 register struct mbuf *m; 282 struct socket *so; 283{ 284 register struct rt_msghdr *rtm = 0; 285 register struct rtentry *rt = 0; 286 struct rtentry *saved_nrt = 0; 287 struct radix_node_head *rnh; 288 struct rt_addrinfo info; 289 int len, error = 0; 290 struct ifnet *ifp = 0; 291 struct ifaddr *ifa = 0; 292 293#define senderr(e) { error = e; goto flush;} 294 if (m == 0 || ((m->m_len < sizeof(long)) && 295 (m = m_pullup(m, sizeof(long))) == 0)) 296 return (ENOBUFS); 297 if ((m->m_flags & M_PKTHDR) == 0) 298 panic("route_output"); 299 len = m->m_pkthdr.len; 300 if (len < sizeof(*rtm) || 301 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 302 dst = 0; 303 senderr(EINVAL); 304 } 305 R_Malloc(rtm, struct rt_msghdr *, len); 306 if (rtm == 0) { 307 dst = 0; 308 senderr(ENOBUFS); 309 } 310 m_copydata(m, 0, len, (caddr_t)rtm); 311 if (rtm->rtm_version != RTM_VERSION) { 312 dst = 0; 313 senderr(EPROTONOSUPPORT); 314 } 315 rtm->rtm_pid = curproc->p_pid; 316 bzero(&info, sizeof(info)); 317 info.rti_addrs = rtm->rtm_addrs; 318 if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) { 319 dst = 0; 320 senderr(EINVAL); 321 } 322 info.rti_flags = rtm->rtm_flags; 323 if (dst == 0 || (dst->sa_family >= AF_MAX) 324 || (gate != 0 && (gate->sa_family >= AF_MAX))) 325 senderr(EINVAL); 326 if (genmask) { 327 struct radix_node *t; 328 t = rn_addmask((caddr_t)genmask, 0, 1); 329 if (t && Bcmp((caddr_t *)genmask + 1, (caddr_t *)t->rn_key + 1, 330 *(u_char *)t->rn_key - 1) == 0) 331 genmask = (struct sockaddr *)(t->rn_key); 332 else 333 senderr(ENOBUFS); 334 } 335 336 /* 337 * Verify that the caller has the appropriate privilege; RTM_GET 338 * is the only operation the non-superuser is allowed. 339 */ 340 if (rtm->rtm_type != RTM_GET && (error = suser(curthread)) != 0) 341 senderr(error); 342 343 switch (rtm->rtm_type) { 344 345 case RTM_ADD: 346 if (gate == 0) 347 senderr(EINVAL); 348 error = rtrequest1(RTM_ADD, &info, &saved_nrt); 349 if (error == 0 && saved_nrt) { 350 rt_setmetrics(rtm->rtm_inits, 351 &rtm->rtm_rmx, &saved_nrt->rt_rmx); 352 saved_nrt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 353 saved_nrt->rt_rmx.rmx_locks |= 354 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 355 saved_nrt->rt_refcnt--; 356 saved_nrt->rt_genmask = genmask; 357 } 358 break; 359 360 case RTM_DELETE: 361 error = rtrequest1(RTM_DELETE, &info, &saved_nrt); 362 if (error == 0) { 363 if ((rt = saved_nrt)) 364 rt->rt_refcnt++; 365 goto report; 366 } 367 break; 368 369 case RTM_GET: 370 case RTM_CHANGE: 371 case RTM_LOCK: 372 if ((rnh = rt_tables[dst->sa_family]) == 0) { 373 senderr(EAFNOSUPPORT); 374 } else if ((rt = (struct rtentry *) 375 rnh->rnh_lookup(dst, netmask, rnh)) != NULL) 376 rt->rt_refcnt++; 377 else 378 senderr(ESRCH); 379 switch(rtm->rtm_type) { 380 381 case RTM_GET: 382 report: 383 dst = rt_key(rt); 384 gate = rt->rt_gateway; 385 netmask = rt_mask(rt); 386 genmask = rt->rt_genmask; 387 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 388 ifp = rt->rt_ifp; 389 if (ifp) { 390 ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr; 391 ifaaddr = rt->rt_ifa->ifa_addr; 392 if (ifp->if_flags & IFF_POINTOPOINT) 393 brdaddr = rt->rt_ifa->ifa_dstaddr; 394 rtm->rtm_index = ifp->if_index; 395 } else { 396 ifpaddr = 0; 397 ifaaddr = 0; 398 } 399 } 400 len = rt_msg2(rtm->rtm_type, &info, (caddr_t)0, 401 (struct walkarg *)0); 402 if (len > rtm->rtm_msglen) { 403 struct rt_msghdr *new_rtm; 404 R_Malloc(new_rtm, struct rt_msghdr *, len); 405 if (new_rtm == 0) 406 senderr(ENOBUFS); 407 Bcopy(rtm, new_rtm, rtm->rtm_msglen); 408 Free(rtm); rtm = new_rtm; 409 } 410 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, 411 (struct walkarg *)0); 412 rtm->rtm_flags = rt->rt_flags; 413 rtm->rtm_rmx = rt->rt_rmx; 414 rtm->rtm_addrs = info.rti_addrs; 415 break; 416 417 case RTM_CHANGE: 418 /* new gateway could require new ifaddr, ifp; 419 flags may also be different; ifp may be specified 420 by ll sockaddr when protocol address is ambiguous */ 421#define equal(a1, a2) (bcmp((caddr_t)(a1), (caddr_t)(a2), (a1)->sa_len) == 0) 422 if ((rt->rt_flags & RTF_GATEWAY && gate != NULL) || 423 ifpaddr != NULL || 424 (ifaaddr != NULL && 425 !equal(ifaaddr, rt->rt_ifa->ifa_addr))) { 426 if ((error = rt_getifa(&info)) != 0) 427 senderr(error); 428 } 429 if (gate != NULL && 430 (error = rt_setgate(rt, rt_key(rt), gate)) != 0) 431 senderr(error); 432 if ((ifa = info.rti_ifa) != NULL) { 433 register struct ifaddr *oifa = rt->rt_ifa; 434 if (oifa != ifa) { 435 if (oifa && oifa->ifa_rtrequest) 436 oifa->ifa_rtrequest(RTM_DELETE, rt, 437 &info); 438 IFAFREE(rt->rt_ifa); 439 rt->rt_ifa = ifa; 440 ifa->ifa_refcnt++; 441 rt->rt_ifp = info.rti_ifp; 442 } 443 } 444 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 445 &rt->rt_rmx); 446 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 447 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info); 448 if (genmask) 449 rt->rt_genmask = genmask; 450 /* 451 * Fall into 452 */ 453 case RTM_LOCK: 454 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 455 rt->rt_rmx.rmx_locks |= 456 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 457 break; 458 } 459 break; 460 461 default: 462 senderr(EOPNOTSUPP); 463 } 464 465flush: 466 if (rtm) { 467 if (error) 468 rtm->rtm_errno = error; 469 else 470 rtm->rtm_flags |= RTF_DONE; 471 } 472 if (rt) 473 rtfree(rt); 474 { 475 register struct rawcb *rp = 0; 476 /* 477 * Check to see if we don't want our own messages. 478 */ 479 if ((so->so_options & SO_USELOOPBACK) == 0) { 480 if (route_cb.any_count <= 1) { 481 if (rtm) 482 Free(rtm); 483 m_freem(m); 484 return (error); 485 } 486 /* There is another listener, so construct message */ 487 rp = sotorawcb(so); 488 } 489 if (rtm) { 490 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 491 if (m->m_pkthdr.len < rtm->rtm_msglen) { 492 m_freem(m); 493 m = NULL; 494 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 495 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 496 Free(rtm); 497 } 498 if (rp) 499 rp->rcb_proto.sp_family = 0; /* Avoid us */ 500 if (dst) 501 route_proto.sp_protocol = dst->sa_family; 502 if (m) 503 raw_input(m, &route_proto, &route_src, &route_dst); 504 if (rp) 505 rp->rcb_proto.sp_family = PF_ROUTE; 506 } 507 return (error); 508} 509 510static void 511rt_setmetrics(which, in, out) 512 u_long which; 513 register struct rt_metrics *in, *out; 514{ 515#define metric(f, e) if (which & (f)) out->e = in->e; 516 metric(RTV_RPIPE, rmx_recvpipe); 517 metric(RTV_SPIPE, rmx_sendpipe); 518 metric(RTV_SSTHRESH, rmx_ssthresh); 519 metric(RTV_RTT, rmx_rtt); 520 metric(RTV_RTTVAR, rmx_rttvar); 521 metric(RTV_HOPCOUNT, rmx_hopcount); 522 metric(RTV_MTU, rmx_mtu); 523 metric(RTV_EXPIRE, rmx_expire); 524#undef metric 525} 526 527#define ROUNDUP(a) \ 528 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 529#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 530 531 532/* 533 * Extract the addresses of the passed sockaddrs. 534 * Do a little sanity checking so as to avoid bad memory references. 535 * This data is derived straight from userland. 536 */ 537static int 538rt_xaddrs(cp, cplim, rtinfo) 539 register caddr_t cp, cplim; 540 register struct rt_addrinfo *rtinfo; 541{ 542 register struct sockaddr *sa; 543 register int i; 544 545 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 546 if ((rtinfo->rti_addrs & (1 << i)) == 0) 547 continue; 548 sa = (struct sockaddr *)cp; 549 /* 550 * It won't fit. 551 */ 552 if ( (cp + sa->sa_len) > cplim ) { 553 return (EINVAL); 554 } 555 556 /* 557 * there are no more.. quit now 558 * If there are more bits, they are in error. 559 * I've seen this. route(1) can evidently generate these. 560 * This causes kernel to core dump. 561 * for compatibility, If we see this, point to a safe address. 562 */ 563 if (sa->sa_len == 0) { 564 rtinfo->rti_info[i] = &sa_zero; 565 return (0); /* should be EINVAL but for compat */ 566 } 567 568 /* accept it */ 569 rtinfo->rti_info[i] = sa; 570 ADVANCE(cp, sa); 571 } 572 return (0); 573} 574 575static struct mbuf * 576rt_msg1(type, rtinfo) 577 int type; 578 register struct rt_addrinfo *rtinfo; 579{ 580 register struct rt_msghdr *rtm; 581 register struct mbuf *m; 582 register int i; 583 register struct sockaddr *sa; 584 int len, dlen; 585 586 switch (type) { 587 588 case RTM_DELADDR: 589 case RTM_NEWADDR: 590 len = sizeof(struct ifa_msghdr); 591 break; 592 593 case RTM_DELMADDR: 594 case RTM_NEWMADDR: 595 len = sizeof(struct ifma_msghdr); 596 break; 597 598 case RTM_IFINFO: 599 len = sizeof(struct if_msghdr); 600 break; 601 602 case RTM_IFANNOUNCE: 603 len = sizeof(struct if_announcemsghdr); 604 break; 605 606 default: 607 len = sizeof(struct rt_msghdr); 608 } 609 if (len > MCLBYTES) 610 panic("rt_msg1"); 611 m = m_gethdr(M_DONTWAIT, MT_DATA); 612 if (m && len > MHLEN) { 613 MCLGET(m, M_DONTWAIT); 614 if ((m->m_flags & M_EXT) == 0) { 615 m_free(m); 616 m = NULL; 617 } 618 } 619 if (m == 0) 620 return (m); 621 m->m_pkthdr.len = m->m_len = len; 622 m->m_pkthdr.rcvif = 0; 623 rtm = mtod(m, struct rt_msghdr *); 624 bzero((caddr_t)rtm, len); 625 for (i = 0; i < RTAX_MAX; i++) { 626 if ((sa = rtinfo->rti_info[i]) == NULL) 627 continue; 628 rtinfo->rti_addrs |= (1 << i); 629 dlen = ROUNDUP(sa->sa_len); 630 m_copyback(m, len, dlen, (caddr_t)sa); 631 len += dlen; 632 } 633 if (m->m_pkthdr.len != len) { 634 m_freem(m); 635 return (NULL); 636 } 637 rtm->rtm_msglen = len; 638 rtm->rtm_version = RTM_VERSION; 639 rtm->rtm_type = type; 640 return (m); 641} 642 643static int 644rt_msg2(type, rtinfo, cp, w) 645 int type; 646 register struct rt_addrinfo *rtinfo; 647 caddr_t cp; 648 struct walkarg *w; 649{ 650 register int i; 651 int len, dlen, second_time = 0; 652 caddr_t cp0; 653 654 rtinfo->rti_addrs = 0; 655again: 656 switch (type) { 657 658 case RTM_DELADDR: 659 case RTM_NEWADDR: 660 len = sizeof(struct ifa_msghdr); 661 break; 662 663 case RTM_IFINFO: 664 len = sizeof(struct if_msghdr); 665 break; 666 667 default: 668 len = sizeof(struct rt_msghdr); 669 } 670 cp0 = cp; 671 if (cp0) 672 cp += len; 673 for (i = 0; i < RTAX_MAX; i++) { 674 register struct sockaddr *sa; 675 676 if ((sa = rtinfo->rti_info[i]) == 0) 677 continue; 678 rtinfo->rti_addrs |= (1 << i); 679 dlen = ROUNDUP(sa->sa_len); 680 if (cp) { 681 bcopy((caddr_t)sa, cp, (unsigned)dlen); 682 cp += dlen; 683 } 684 len += dlen; 685 } 686 len = ALIGN(len); 687 if (cp == 0 && w != NULL && !second_time) { 688 register struct walkarg *rw = w; 689 690 if (rw->w_req) { 691 if (rw->w_tmemsize < len) { 692 if (rw->w_tmem) 693 free(rw->w_tmem, M_RTABLE); 694 rw->w_tmem = (caddr_t) 695 malloc(len, M_RTABLE, M_NOWAIT); 696 if (rw->w_tmem) 697 rw->w_tmemsize = len; 698 } 699 if (rw->w_tmem) { 700 cp = rw->w_tmem; 701 second_time = 1; 702 goto again; 703 } 704 } 705 } 706 if (cp) { 707 register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 708 709 rtm->rtm_version = RTM_VERSION; 710 rtm->rtm_type = type; 711 rtm->rtm_msglen = len; 712 } 713 return (len); 714} 715 716/* 717 * This routine is called to generate a message from the routing 718 * socket indicating that a redirect has occured, a routing lookup 719 * has failed, or that a protocol has detected timeouts to a particular 720 * destination. 721 */ 722void 723rt_missmsg(type, rtinfo, flags, error) 724 int type, flags, error; 725 register struct rt_addrinfo *rtinfo; 726{ 727 register struct rt_msghdr *rtm; 728 register struct mbuf *m; 729 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 730 731 if (route_cb.any_count == 0) 732 return; 733 m = rt_msg1(type, rtinfo); 734 if (m == 0) 735 return; 736 rtm = mtod(m, struct rt_msghdr *); 737 rtm->rtm_flags = RTF_DONE | flags; 738 rtm->rtm_errno = error; 739 rtm->rtm_addrs = rtinfo->rti_addrs; 740 route_proto.sp_protocol = sa ? sa->sa_family : 0; 741 raw_input(m, &route_proto, &route_src, &route_dst); 742} 743 744/* 745 * This routine is called to generate a message from the routing 746 * socket indicating that the status of a network interface has changed. 747 */ 748void 749rt_ifmsg(ifp) 750 register struct ifnet *ifp; 751{ 752 register struct if_msghdr *ifm; 753 struct mbuf *m; 754 struct rt_addrinfo info; 755 756 if (route_cb.any_count == 0) 757 return; 758 bzero((caddr_t)&info, sizeof(info)); 759 m = rt_msg1(RTM_IFINFO, &info); 760 if (m == 0) 761 return; 762 ifm = mtod(m, struct if_msghdr *); 763 ifm->ifm_index = ifp->if_index; 764 ifm->ifm_flags = (u_short)ifp->if_flags; 765 ifm->ifm_data = ifp->if_data; 766 ifm->ifm_addrs = 0; 767 route_proto.sp_protocol = 0; 768 raw_input(m, &route_proto, &route_src, &route_dst); 769} 770 771/* 772 * This is called to generate messages from the routing socket 773 * indicating a network interface has had addresses associated with it. 774 * if we ever reverse the logic and replace messages TO the routing 775 * socket indicate a request to configure interfaces, then it will 776 * be unnecessary as the routing socket will automatically generate 777 * copies of it. 778 */ 779void 780rt_newaddrmsg(cmd, ifa, error, rt) 781 int cmd, error; 782 register struct ifaddr *ifa; 783 register struct rtentry *rt; 784{ 785 struct rt_addrinfo info; 786 struct sockaddr *sa = 0; 787 int pass; 788 struct mbuf *m = 0; 789 struct ifnet *ifp = ifa->ifa_ifp; 790 791 if (route_cb.any_count == 0) 792 return; 793 for (pass = 1; pass < 3; pass++) { 794 bzero((caddr_t)&info, sizeof(info)); 795 if ((cmd == RTM_ADD && pass == 1) || 796 (cmd == RTM_DELETE && pass == 2)) { 797 register struct ifa_msghdr *ifam; 798 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 799 800 ifaaddr = sa = ifa->ifa_addr; 801 ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr; 802 netmask = ifa->ifa_netmask; 803 brdaddr = ifa->ifa_dstaddr; 804 if ((m = rt_msg1(ncmd, &info)) == NULL) 805 continue; 806 ifam = mtod(m, struct ifa_msghdr *); 807 ifam->ifam_index = ifp->if_index; 808 ifam->ifam_metric = ifa->ifa_metric; 809 ifam->ifam_flags = ifa->ifa_flags; 810 ifam->ifam_addrs = info.rti_addrs; 811 } 812 if ((cmd == RTM_ADD && pass == 2) || 813 (cmd == RTM_DELETE && pass == 1)) { 814 register struct rt_msghdr *rtm; 815 816 if (rt == 0) 817 continue; 818 netmask = rt_mask(rt); 819 dst = sa = rt_key(rt); 820 gate = rt->rt_gateway; 821 if ((m = rt_msg1(cmd, &info)) == NULL) 822 continue; 823 rtm = mtod(m, struct rt_msghdr *); 824 rtm->rtm_index = ifp->if_index; 825 rtm->rtm_flags |= rt->rt_flags; 826 rtm->rtm_errno = error; 827 rtm->rtm_addrs = info.rti_addrs; 828 } 829 route_proto.sp_protocol = sa ? sa->sa_family : 0; 830 raw_input(m, &route_proto, &route_src, &route_dst); 831 } 832} 833 834/* 835 * This is the analogue to the rt_newaddrmsg which performs the same 836 * function but for multicast group memberhips. This is easier since 837 * there is no route state to worry about. 838 */ 839void 840rt_newmaddrmsg(cmd, ifma) 841 int cmd; 842 struct ifmultiaddr *ifma; 843{ 844 struct rt_addrinfo info; 845 struct mbuf *m = 0; 846 struct ifnet *ifp = ifma->ifma_ifp; 847 struct ifma_msghdr *ifmam; 848 849 if (route_cb.any_count == 0) 850 return; 851 852 bzero((caddr_t)&info, sizeof(info)); 853 ifaaddr = ifma->ifma_addr; 854 if (ifp && TAILQ_FIRST(&ifp->if_addrhead)) 855 ifpaddr = TAILQ_FIRST(&ifp->if_addrhead)->ifa_addr; 856 else 857 ifpaddr = NULL; 858 /* 859 * If a link-layer address is present, present it as a ``gateway'' 860 * (similarly to how ARP entries, e.g., are presented). 861 */ 862 gate = ifma->ifma_lladdr; 863 if ((m = rt_msg1(cmd, &info)) == NULL) 864 return; 865 ifmam = mtod(m, struct ifma_msghdr *); 866 ifmam->ifmam_index = ifp->if_index; 867 ifmam->ifmam_addrs = info.rti_addrs; 868 route_proto.sp_protocol = ifma->ifma_addr->sa_family; 869 raw_input(m, &route_proto, &route_src, &route_dst); 870} 871 872/* 873 * This is called to generate routing socket messages indicating 874 * network interface arrival and departure. 875 */ 876void 877rt_ifannouncemsg(ifp, what) 878 struct ifnet *ifp; 879 int what; 880{ 881 struct if_announcemsghdr *ifan; 882 struct mbuf *m; 883 struct rt_addrinfo info; 884 885 if (route_cb.any_count == 0) 886 return; 887 bzero((caddr_t)&info, sizeof(info)); 888 m = rt_msg1(RTM_IFANNOUNCE, &info); 889 if (m == NULL) 890 return; 891 ifan = mtod(m, struct if_announcemsghdr *); 892 ifan->ifan_index = ifp->if_index; 893 snprintf(ifan->ifan_name, sizeof(ifan->ifan_name), 894 "%s%d", ifp->if_name, ifp->if_unit); 895 ifan->ifan_what = what; 896 route_proto.sp_protocol = 0; 897 raw_input(m, &route_proto, &route_src, &route_dst); 898 } 899 900/* 901 * This is used in dumping the kernel table via sysctl(). 902 */ 903int 904sysctl_dumpentry(rn, vw) 905 struct radix_node *rn; 906 void *vw; 907{ 908 register struct walkarg *w = vw; 909 register struct rtentry *rt = (struct rtentry *)rn; 910 int error = 0, size; 911 struct rt_addrinfo info; 912 913 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 914 return 0; 915 bzero((caddr_t)&info, sizeof(info)); 916 dst = rt_key(rt); 917 gate = rt->rt_gateway; 918 netmask = rt_mask(rt); 919 genmask = rt->rt_genmask; 920 if (rt->rt_ifp) { 921 ifpaddr = TAILQ_FIRST(&rt->rt_ifp->if_addrhead)->ifa_addr; 922 ifaaddr = rt->rt_ifa->ifa_addr; 923 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 924 brdaddr = rt->rt_ifa->ifa_dstaddr; 925 } 926 size = rt_msg2(RTM_GET, &info, 0, w); 927 if (w->w_req && w->w_tmem) { 928 register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 929 930 rtm->rtm_flags = rt->rt_flags; 931 rtm->rtm_use = rt->rt_use; 932 rtm->rtm_rmx = rt->rt_rmx; 933 rtm->rtm_index = rt->rt_ifp->if_index; 934 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 935 rtm->rtm_addrs = info.rti_addrs; 936 error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size); 937 return (error); 938 } 939 return (error); 940} 941 942int 943sysctl_iflist(af, w) 944 int af; 945 register struct walkarg *w; 946{ 947 register struct ifnet *ifp; 948 register struct ifaddr *ifa; 949 struct rt_addrinfo info; 950 int len, error = 0; 951 952 bzero((caddr_t)&info, sizeof(info)); 953 TAILQ_FOREACH(ifp, &ifnet, if_link) { 954 if (w->w_arg && w->w_arg != ifp->if_index) 955 continue; 956 ifa = TAILQ_FIRST(&ifp->if_addrhead); 957 ifpaddr = ifa->ifa_addr; 958 len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w); 959 ifpaddr = 0; 960 if (w->w_req && w->w_tmem) { 961 register struct if_msghdr *ifm; 962 963 ifm = (struct if_msghdr *)w->w_tmem; 964 ifm->ifm_index = ifp->if_index; 965 ifm->ifm_flags = (u_short)ifp->if_flags; 966 ifm->ifm_data = ifp->if_data; 967 ifm->ifm_addrs = info.rti_addrs; 968 error = SYSCTL_OUT(w->w_req,(caddr_t)ifm, len); 969 if (error) 970 goto done; 971 } 972 while ((ifa = TAILQ_NEXT(ifa, ifa_link)) != 0) { 973 if (af && af != ifa->ifa_addr->sa_family) 974 continue; 975 if (jailed(curthread->td_ucred) && 976 prison_if(curthread->td_ucred, ifa->ifa_addr)) 977 continue; 978 ifaaddr = ifa->ifa_addr; 979 netmask = ifa->ifa_netmask; 980 brdaddr = ifa->ifa_dstaddr; 981 len = rt_msg2(RTM_NEWADDR, &info, 0, w); 982 if (w->w_req && w->w_tmem) { 983 register struct ifa_msghdr *ifam; 984 985 ifam = (struct ifa_msghdr *)w->w_tmem; 986 ifam->ifam_index = ifa->ifa_ifp->if_index; 987 ifam->ifam_flags = ifa->ifa_flags; 988 ifam->ifam_metric = ifa->ifa_metric; 989 ifam->ifam_addrs = info.rti_addrs; 990 error = SYSCTL_OUT(w->w_req, w->w_tmem, len); 991 if (error) 992 goto done; 993 } 994 } 995 ifaaddr = netmask = brdaddr = 0; 996 } 997done: 998 return (error); 999} 1000 1001static int 1002sysctl_rtsock(SYSCTL_HANDLER_ARGS) 1003{ 1004 int *name = (int *)arg1; 1005 u_int namelen = arg2; 1006 register struct radix_node_head *rnh; 1007 int i, s, error = EINVAL; 1008 u_char af; 1009 struct walkarg w; 1010 1011 name ++; 1012 namelen--; 1013 if (req->newptr) 1014 return (EPERM); 1015 if (namelen != 3) 1016 return ((namelen < 3) ? EISDIR : ENOTDIR); 1017 af = name[0]; 1018 Bzero(&w, sizeof(w)); 1019 w.w_op = name[1]; 1020 w.w_arg = name[2]; 1021 w.w_req = req; 1022 1023 s = splnet(); 1024 switch (w.w_op) { 1025 1026 case NET_RT_DUMP: 1027 case NET_RT_FLAGS: 1028 for (i = 1; i <= AF_MAX; i++) 1029 if ((rnh = rt_tables[i]) && (af == 0 || af == i) && 1030 (error = rnh->rnh_walktree(rnh, 1031 sysctl_dumpentry, &w))) 1032 break; 1033 break; 1034 1035 case NET_RT_IFLIST: 1036 error = sysctl_iflist(af, &w); 1037 } 1038 splx(s); 1039 if (w.w_tmem) 1040 free(w.w_tmem, M_RTABLE); 1041 return (error); 1042} 1043 1044SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock, ""); 1045 1046/* 1047 * Definitions of protocols supported in the ROUTE domain. 1048 */ 1049 1050extern struct domain routedomain; /* or at least forward */ 1051 1052static struct protosw routesw[] = { 1053{ SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 1054 0, route_output, raw_ctlinput, 0, 1055 0, 1056 raw_init, 0, 0, 0, 1057 &route_usrreqs 1058} 1059}; 1060 1061static struct domain routedomain = 1062 { PF_ROUTE, "route", 0, 0, 0, 1063 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 1064 1065DOMAIN_SET(route);
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