rtsock.c revision 1.43
1 /* $NetBSD: rtsock.c,v 1.43 2000/10/19 01:07:42 itojun 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 <uvm/uvm_extern.h> 79 80 #include <sys/sysctl.h> 81 82 #include <net/if.h> 83 #include <net/route.h> 84 #include <net/raw_cb.h> 85 86 #include <machine/stdarg.h> 87 88 struct sockaddr route_dst = { 2, PF_ROUTE, }; 89 struct sockaddr route_src = { 2, PF_ROUTE, }; 90 struct sockproto route_proto = { PF_ROUTE, }; 91 92 struct walkarg { 93 int w_op; 94 int w_arg; 95 int w_given; 96 int w_needed; 97 caddr_t w_where; 98 int w_tmemsize; 99 int w_tmemneeded; 100 caddr_t w_tmem; 101 }; 102 103 static struct mbuf *rt_msg1 __P((int, struct rt_addrinfo *, caddr_t, int)); 104 static int rt_msg2 __P((int, struct rt_addrinfo *, caddr_t, struct walkarg *, 105 int *)); 106 static int rt_xaddrs __P((caddr_t, caddr_t, struct rt_addrinfo *)); 107 static int sysctl_dumpentry __P((struct radix_node *, void *)); 108 static int sysctl_iflist __P((int, struct walkarg *, int)); 109 static int sysctl_rtable __P((int *, u_int, void *, size_t *, void *, size_t)); 110 static __inline void rt_adjustcount __P((int, int)); 111 112 /* Sleazy use of local variables throughout file, warning!!!! */ 113 #define dst info.rti_info[RTAX_DST] 114 #define gate info.rti_info[RTAX_GATEWAY] 115 #define netmask info.rti_info[RTAX_NETMASK] 116 #define genmask info.rti_info[RTAX_GENMASK] 117 #define ifpaddr info.rti_info[RTAX_IFP] 118 #define ifaaddr info.rti_info[RTAX_IFA] 119 #define brdaddr info.rti_info[RTAX_BRD] 120 121 static __inline void 122 rt_adjustcount(af, cnt) 123 int af, cnt; 124 { 125 route_cb.any_count += cnt; 126 switch (af) { 127 case AF_INET: 128 route_cb.ip_count += cnt; 129 return; 130 #ifdef INET6 131 case AF_INET6: 132 route_cb.ip6_count += cnt; 133 return; 134 #endif 135 case AF_IPX: 136 route_cb.ipx_count += cnt; 137 return; 138 case AF_NS: 139 route_cb.ns_count += cnt; 140 return; 141 case AF_ISO: 142 route_cb.iso_count += cnt; 143 return; 144 } 145 } 146 147 /*ARGSUSED*/ 148 int 149 route_usrreq(so, req, m, nam, control, p) 150 struct socket *so; 151 int req; 152 struct mbuf *m, *nam, *control; 153 struct proc *p; 154 { 155 int error = 0; 156 struct rawcb *rp = sotorawcb(so); 157 int s; 158 159 if (req == PRU_ATTACH) { 160 MALLOC(rp, struct rawcb *, sizeof(*rp), M_PCB, M_WAITOK); 161 if ((so->so_pcb = rp) != NULL) 162 bzero(so->so_pcb, sizeof(*rp)); 163 164 } 165 if (req == PRU_DETACH && rp) 166 rt_adjustcount(rp->rcb_proto.sp_protocol, -1); 167 s = splsoftnet(); 168 169 /* 170 * Don't call raw_usrreq() in the attach case, because 171 * we want to allow non-privileged processes to listen on 172 * and send "safe" commands to the routing socket. 173 */ 174 if (req == PRU_ATTACH) { 175 if (p == 0) 176 error = EACCES; 177 else 178 error = raw_attach(so, (int)(long)nam); 179 } else 180 error = raw_usrreq(so, req, m, nam, control, p); 181 182 rp = sotorawcb(so); 183 if (req == PRU_ATTACH && rp) { 184 if (error) { 185 free((caddr_t)rp, M_PCB); 186 splx(s); 187 return (error); 188 } 189 rt_adjustcount(rp->rcb_proto.sp_protocol, 1); 190 rp->rcb_laddr = &route_src; 191 rp->rcb_faddr = &route_dst; 192 soisconnected(so); 193 so->so_options |= SO_USELOOPBACK; 194 } 195 splx(s); 196 return (error); 197 } 198 199 /*ARGSUSED*/ 200 int 201 #if __STDC__ 202 route_output(struct mbuf *m, ...) 203 #else 204 route_output(m, va_alist) 205 struct mbuf *m; 206 va_dcl 207 #endif 208 { 209 struct rt_msghdr *rtm = 0; 210 struct radix_node *rn = 0; 211 struct rtentry *rt = 0; 212 struct rtentry *saved_nrt = 0; 213 struct radix_node_head *rnh; 214 struct rt_addrinfo info; 215 int len, error = 0; 216 struct ifnet *ifp = 0; 217 struct ifaddr *ifa = 0; 218 struct socket *so; 219 va_list ap; 220 221 va_start(ap, m); 222 so = va_arg(ap, struct socket *); 223 va_end(ap); 224 225 bzero(&info, sizeof(info)); 226 #define senderr(e) do { error = e; goto flush;} while (0) 227 if (m == 0 || ((m->m_len < sizeof(int32_t)) && 228 (m = m_pullup(m, sizeof(int32_t))) == 0)) 229 return (ENOBUFS); 230 if ((m->m_flags & M_PKTHDR) == 0) 231 panic("route_output"); 232 len = m->m_pkthdr.len; 233 if (len < sizeof(*rtm) || 234 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 235 dst = 0; 236 senderr(EINVAL); 237 } 238 R_Malloc(rtm, struct rt_msghdr *, len); 239 if (rtm == 0) { 240 dst = 0; 241 senderr(ENOBUFS); 242 } 243 m_copydata(m, 0, len, (caddr_t)rtm); 244 if (rtm->rtm_version != RTM_VERSION) { 245 dst = 0; 246 senderr(EPROTONOSUPPORT); 247 } 248 rtm->rtm_pid = curproc->p_pid; 249 info.rti_addrs = rtm->rtm_addrs; 250 if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) 251 senderr(EINVAL); 252 if (dst == 0 || (dst->sa_family >= AF_MAX)) 253 senderr(EINVAL); 254 if (gate != 0 && (gate->sa_family >= AF_MAX)) 255 senderr(EINVAL); 256 if (genmask) { 257 struct radix_node *t; 258 t = rn_addmask((caddr_t)genmask, 0, 1); 259 if (t && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0) 260 genmask = (struct sockaddr *)(t->rn_key); 261 else 262 senderr(ENOBUFS); 263 } 264 265 /* 266 * Verify that the caller has the appropriate privilege; RTM_GET 267 * is the only operation the non-superuser is allowed. 268 */ 269 if (rtm->rtm_type != RTM_GET && 270 suser(curproc->p_ucred, &curproc->p_acflag) != 0) 271 senderr(EACCES); 272 273 switch (rtm->rtm_type) { 274 275 case RTM_ADD: 276 if (gate == 0) 277 senderr(EINVAL); 278 error = rtrequest(RTM_ADD, dst, gate, netmask, 279 rtm->rtm_flags, &saved_nrt); 280 if (error == 0 && saved_nrt) { 281 rt_setmetrics(rtm->rtm_inits, 282 &rtm->rtm_rmx, &saved_nrt->rt_rmx); 283 saved_nrt->rt_refcnt--; 284 saved_nrt->rt_genmask = genmask; 285 } 286 break; 287 288 case RTM_DELETE: 289 error = rtrequest(RTM_DELETE, dst, gate, netmask, 290 rtm->rtm_flags, &saved_nrt); 291 if (error == 0) { 292 (rt = saved_nrt)->rt_refcnt++; 293 goto report; 294 } 295 break; 296 297 case RTM_GET: 298 case RTM_CHANGE: 299 case RTM_LOCK: 300 if ((rnh = rt_tables[dst->sa_family]) == 0) { 301 senderr(EAFNOSUPPORT); 302 } 303 rn = rnh->rnh_lookup(dst, netmask, rnh); 304 if (rn == NULL || (rn->rn_flags & RNF_ROOT) != 0) { 305 senderr(ESRCH); 306 } 307 rt = (struct rtentry *)rn; 308 rt->rt_refcnt++; 309 310 switch(rtm->rtm_type) { 311 312 case RTM_GET: 313 report: 314 dst = rt_key(rt); 315 gate = rt->rt_gateway; 316 netmask = rt_mask(rt); 317 genmask = rt->rt_genmask; 318 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 319 if ((ifp = rt->rt_ifp) != NULL) { 320 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 321 ifaaddr = rt->rt_ifa->ifa_addr; 322 if (ifp->if_flags & IFF_POINTOPOINT) 323 brdaddr = rt->rt_ifa->ifa_dstaddr; 324 else 325 brdaddr = 0; 326 rtm->rtm_index = ifp->if_index; 327 } else { 328 ifpaddr = 0; 329 ifaaddr = 0; 330 } 331 } 332 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)0, 333 (struct walkarg *)0, &len); 334 if (len > rtm->rtm_msglen) { 335 struct rt_msghdr *new_rtm; 336 R_Malloc(new_rtm, struct rt_msghdr *, len); 337 if (new_rtm == 0) 338 senderr(ENOBUFS); 339 Bcopy(rtm, new_rtm, rtm->rtm_msglen); 340 Free(rtm); rtm = new_rtm; 341 } 342 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, 343 (struct walkarg *)0, 0); 344 rtm->rtm_flags = rt->rt_flags; 345 rtm->rtm_rmx = rt->rt_rmx; 346 rtm->rtm_addrs = info.rti_addrs; 347 break; 348 349 case RTM_CHANGE: 350 if (gate && rt_setgate(rt, rt_key(rt), gate)) 351 senderr(EDQUOT); 352 /* new gateway could require new ifaddr, ifp; 353 flags may also be different; ifp may be specified 354 by ll sockaddr when protocol address is ambiguous */ 355 if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) && 356 (ifp = ifa->ifa_ifp) && (ifaaddr || gate)) 357 ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate, 358 ifp); 359 else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) || 360 (gate && (ifa = ifa_ifwithroute(rt->rt_flags, 361 rt_key(rt), gate)))) 362 ifp = ifa->ifa_ifp; 363 if (ifa) { 364 struct ifaddr *oifa = rt->rt_ifa; 365 if (oifa != ifa) { 366 if (oifa && oifa->ifa_rtrequest) 367 oifa->ifa_rtrequest(RTM_DELETE, 368 rt, gate); 369 IFAFREE(rt->rt_ifa); 370 rt->rt_ifa = ifa; 371 IFAREF(rt->rt_ifa); 372 rt->rt_ifp = ifp; 373 } 374 } 375 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 376 &rt->rt_rmx); 377 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 378 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate); 379 if (genmask) 380 rt->rt_genmask = genmask; 381 /* 382 * Fall into 383 */ 384 case RTM_LOCK: 385 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 386 rt->rt_rmx.rmx_locks |= 387 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 388 break; 389 } 390 break; 391 392 default: 393 senderr(EOPNOTSUPP); 394 } 395 396 flush: 397 if (rtm) { 398 if (error) 399 rtm->rtm_errno = error; 400 else 401 rtm->rtm_flags |= RTF_DONE; 402 } 403 if (rt) 404 rtfree(rt); 405 { 406 struct rawcb *rp = 0; 407 /* 408 * Check to see if we don't want our own messages. 409 */ 410 if ((so->so_options & SO_USELOOPBACK) == 0) { 411 if (route_cb.any_count <= 1) { 412 if (rtm) 413 Free(rtm); 414 m_freem(m); 415 return (error); 416 } 417 /* There is another listener, so construct message */ 418 rp = sotorawcb(so); 419 } 420 if (rtm) { 421 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 422 Free(rtm); 423 } 424 if (rp) 425 rp->rcb_proto.sp_family = 0; /* Avoid us */ 426 if (dst) 427 route_proto.sp_protocol = dst->sa_family; 428 raw_input(m, &route_proto, &route_src, &route_dst); 429 if (rp) 430 rp->rcb_proto.sp_family = PF_ROUTE; 431 } 432 return (error); 433 } 434 435 void 436 rt_setmetrics(which, in, out) 437 u_long which; 438 struct rt_metrics *in, *out; 439 { 440 #define metric(f, e) if (which & (f)) out->e = in->e; 441 metric(RTV_RPIPE, rmx_recvpipe); 442 metric(RTV_SPIPE, rmx_sendpipe); 443 metric(RTV_SSTHRESH, rmx_ssthresh); 444 metric(RTV_RTT, rmx_rtt); 445 metric(RTV_RTTVAR, rmx_rttvar); 446 metric(RTV_HOPCOUNT, rmx_hopcount); 447 metric(RTV_MTU, rmx_mtu); 448 metric(RTV_EXPIRE, rmx_expire); 449 #undef metric 450 } 451 452 #define ROUNDUP(a) \ 453 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 454 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 455 456 static int 457 rt_xaddrs(cp, cplim, rtinfo) 458 caddr_t cp, cplim; 459 struct rt_addrinfo *rtinfo; 460 { 461 struct sockaddr *sa; 462 int i; 463 464 bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info)); 465 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 466 if ((rtinfo->rti_addrs & (1 << i)) == 0) 467 continue; 468 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 469 ADVANCE(cp, sa); 470 } 471 /* Check for bad data length, or extra addresses specified */ 472 if ( (cp != cplim) || (rtinfo->rti_addrs & (~0 << i)) ) 473 return 1; 474 return 0; 475 } 476 477 static struct mbuf * 478 rt_msg1(type, rtinfo, data, datalen) 479 int type; 480 struct rt_addrinfo *rtinfo; 481 caddr_t data; 482 int datalen; 483 { 484 struct rt_msghdr *rtm; 485 struct mbuf *m; 486 int i; 487 struct sockaddr *sa; 488 int len, dlen; 489 490 m = m_gethdr(M_DONTWAIT, MT_DATA); 491 if (m == 0) 492 return (m); 493 switch (type) { 494 495 case RTM_DELADDR: 496 case RTM_NEWADDR: 497 len = sizeof(struct ifa_msghdr); 498 break; 499 500 #ifdef COMPAT_14 501 case RTM_OIFINFO: 502 len = sizeof(struct if_msghdr14); 503 break; 504 #endif 505 506 case RTM_IFINFO: 507 len = sizeof(struct if_msghdr); 508 break; 509 510 case RTM_IFANNOUNCE: 511 len = sizeof(struct if_announcemsghdr); 512 break; 513 514 default: 515 len = sizeof(struct rt_msghdr); 516 } 517 if (len > MHLEN + MLEN) 518 panic("rt_msg1: message too long"); 519 else if (len > MHLEN) { 520 m->m_next = m_get(M_DONTWAIT, MT_DATA); 521 if (m->m_next == NULL) { 522 m_freem(m); 523 return (NULL); 524 } 525 m->m_pkthdr.len = len; 526 m->m_len = MHLEN; 527 m->m_next->m_len = len - MHLEN; 528 } else { 529 m->m_pkthdr.len = m->m_len = len; 530 } 531 m->m_pkthdr.rcvif = 0; 532 m_copyback(m, 0, datalen, data); 533 rtm = mtod(m, struct rt_msghdr *); 534 for (i = 0; i < RTAX_MAX; i++) { 535 if ((sa = rtinfo->rti_info[i]) == NULL) 536 continue; 537 rtinfo->rti_addrs |= (1 << i); 538 dlen = ROUNDUP(sa->sa_len); 539 m_copyback(m, len, dlen, (caddr_t)sa); 540 len += dlen; 541 } 542 rtm->rtm_msglen = len; 543 rtm->rtm_version = RTM_VERSION; 544 rtm->rtm_type = type; 545 return (m); 546 } 547 548 /* 549 * rt_msg2 550 * 551 * fills 'cp' or 'w'.w_tmem with the routing socket message and 552 * returns the length of the message in 'lenp'. 553 * 554 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 555 * the message 556 * otherwise walkarg's w_needed is updated and if the user buffer is 557 * specified and w_needed indicates space exists the information is copied 558 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 559 * if the allocation fails ENOBUFS is returned. 560 */ 561 static int 562 rt_msg2(type, rtinfo, cp, w, lenp) 563 int type; 564 struct rt_addrinfo *rtinfo; 565 caddr_t cp; 566 struct walkarg *w; 567 int *lenp; 568 { 569 int i; 570 int len, dlen, second_time = 0; 571 caddr_t cp0; 572 573 rtinfo->rti_addrs = 0; 574 again: 575 switch (type) { 576 577 case RTM_DELADDR: 578 case RTM_NEWADDR: 579 len = sizeof(struct ifa_msghdr); 580 break; 581 #ifdef COMPAT_14 582 case RTM_OIFINFO: 583 len = sizeof(struct if_msghdr14); 584 break; 585 #endif 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 ((cp0 = cp) != NULL) 595 cp += len; 596 for (i = 0; i < RTAX_MAX; i++) { 597 struct sockaddr *sa; 598 599 if ((sa = rtinfo->rti_info[i]) == 0) 600 continue; 601 rtinfo->rti_addrs |= (1 << i); 602 dlen = ROUNDUP(sa->sa_len); 603 if (cp) { 604 bcopy(sa, cp, (unsigned)dlen); 605 cp += dlen; 606 } 607 len += dlen; 608 } 609 if (cp == 0 && w != NULL && !second_time) { 610 struct walkarg *rw = w; 611 612 rw->w_needed += len; 613 if (rw->w_needed <= 0 && rw->w_where) { 614 if (rw->w_tmemsize < len) { 615 if (rw->w_tmem) 616 free(rw->w_tmem, M_RTABLE); 617 rw->w_tmem = (caddr_t) malloc(len, M_RTABLE, 618 M_NOWAIT); 619 if (rw->w_tmem) 620 rw->w_tmemsize = len; 621 } 622 if (rw->w_tmem) { 623 cp = rw->w_tmem; 624 second_time = 1; 625 goto again; 626 } else { 627 rw->w_tmemneeded = len; 628 return (ENOBUFS); 629 } 630 } 631 } 632 if (cp) { 633 struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 634 635 rtm->rtm_version = RTM_VERSION; 636 rtm->rtm_type = type; 637 rtm->rtm_msglen = len; 638 } 639 if (lenp) 640 *lenp = len; 641 return (0); 642 } 643 644 /* 645 * This routine is called to generate a message from the routing 646 * socket indicating that a redirect has occured, a routing lookup 647 * has failed, or that a protocol has detected timeouts to a particular 648 * destination. 649 */ 650 void 651 rt_missmsg(type, rtinfo, flags, error) 652 int type, flags, error; 653 struct rt_addrinfo *rtinfo; 654 { 655 struct rt_msghdr rtm; 656 struct mbuf *m; 657 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 658 659 if (route_cb.any_count == 0) 660 return; 661 bzero(&rtm, sizeof(rtm)); 662 rtm.rtm_flags = RTF_DONE | flags; 663 rtm.rtm_errno = error; 664 m = rt_msg1(type, rtinfo, (caddr_t)&rtm, sizeof(rtm)); 665 if (m == 0) 666 return; 667 mtod(m, struct rt_msghdr *)->rtm_addrs = rtinfo->rti_addrs; 668 route_proto.sp_protocol = sa ? sa->sa_family : 0; 669 raw_input(m, &route_proto, &route_src, &route_dst); 670 } 671 672 /* 673 * This routine is called to generate a message from the routing 674 * socket indicating that the status of a network interface has changed. 675 */ 676 void 677 rt_ifmsg(ifp) 678 struct ifnet *ifp; 679 { 680 struct if_msghdr ifm; 681 #ifdef COMPAT_14 682 struct if_msghdr14 oifm; 683 #endif 684 struct mbuf *m; 685 struct rt_addrinfo info; 686 687 if (route_cb.any_count == 0) 688 return; 689 bzero(&info, sizeof(info)); 690 bzero(&ifm, sizeof(ifm)); 691 ifm.ifm_index = ifp->if_index; 692 ifm.ifm_flags = ifp->if_flags; 693 ifm.ifm_data = ifp->if_data; 694 ifm.ifm_addrs = 0; 695 m = rt_msg1(RTM_IFINFO, &info, (caddr_t)&ifm, sizeof(ifm)); 696 if (m == 0) 697 return; 698 route_proto.sp_protocol = 0; 699 raw_input(m, &route_proto, &route_src, &route_dst); 700 #ifdef COMPAT_14 701 bzero(&info, sizeof(info)); 702 bzero(&oifm, sizeof(oifm)); 703 oifm.ifm_index = ifp->if_index; 704 oifm.ifm_flags = ifp->if_flags; 705 oifm.ifm_data.ifi_type = ifp->if_data.ifi_type; 706 oifm.ifm_data.ifi_addrlen = ifp->if_data.ifi_addrlen; 707 oifm.ifm_data.ifi_hdrlen = ifp->if_data.ifi_hdrlen; 708 oifm.ifm_data.ifi_mtu = ifp->if_data.ifi_mtu; 709 oifm.ifm_data.ifi_metric = ifp->if_data.ifi_metric; 710 oifm.ifm_data.ifi_baudrate = ifp->if_data.ifi_baudrate; 711 oifm.ifm_data.ifi_ipackets = ifp->if_data.ifi_ipackets; 712 oifm.ifm_data.ifi_ierrors = ifp->if_data.ifi_ierrors; 713 oifm.ifm_data.ifi_opackets = ifp->if_data.ifi_opackets; 714 oifm.ifm_data.ifi_oerrors = ifp->if_data.ifi_oerrors; 715 oifm.ifm_data.ifi_collisions = ifp->if_data.ifi_collisions; 716 oifm.ifm_data.ifi_ibytes = ifp->if_data.ifi_ibytes; 717 oifm.ifm_data.ifi_obytes = ifp->if_data.ifi_obytes; 718 oifm.ifm_data.ifi_imcasts = ifp->if_data.ifi_imcasts; 719 oifm.ifm_data.ifi_omcasts = ifp->if_data.ifi_omcasts; 720 oifm.ifm_data.ifi_iqdrops = ifp->if_data.ifi_iqdrops; 721 oifm.ifm_data.ifi_noproto = ifp->if_data.ifi_noproto; 722 oifm.ifm_data.ifi_lastchange = ifp->if_data.ifi_lastchange; 723 oifm.ifm_addrs = 0; 724 m = rt_msg1(RTM_OIFINFO, &info, (caddr_t)&oifm, sizeof(oifm)); 725 if (m == 0) 726 return; 727 route_proto.sp_protocol = 0; 728 raw_input(m, &route_proto, &route_src, &route_dst); 729 #endif 730 } 731 732 /* 733 * This is called to generate messages from the routing socket 734 * indicating a network interface has had addresses associated with it. 735 * if we ever reverse the logic and replace messages TO the routing 736 * socket indicate a request to configure interfaces, then it will 737 * be unnecessary as the routing socket will automatically generate 738 * copies of it. 739 */ 740 void 741 rt_newaddrmsg(cmd, ifa, error, rt) 742 int cmd, error; 743 struct ifaddr *ifa; 744 struct rtentry *rt; 745 { 746 struct rt_addrinfo info; 747 struct sockaddr *sa = NULL; 748 int pass; 749 struct mbuf *m = NULL; 750 struct ifnet *ifp = ifa->ifa_ifp; 751 752 if (route_cb.any_count == 0) 753 return; 754 for (pass = 1; pass < 3; pass++) { 755 bzero(&info, sizeof(info)); 756 if ((cmd == RTM_ADD && pass == 1) || 757 (cmd == RTM_DELETE && pass == 2)) { 758 struct ifa_msghdr ifam; 759 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 760 761 ifaaddr = sa = ifa->ifa_addr; 762 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 763 netmask = ifa->ifa_netmask; 764 brdaddr = ifa->ifa_dstaddr; 765 bzero(&ifam, sizeof(ifam)); 766 ifam.ifam_index = ifp->if_index; 767 ifam.ifam_metric = ifa->ifa_metric; 768 ifam.ifam_flags = ifa->ifa_flags; 769 m = rt_msg1(ncmd, &info, (caddr_t)&ifam, sizeof(ifam)); 770 if (m == NULL) 771 continue; 772 mtod(m, struct ifa_msghdr *)->ifam_addrs = 773 info.rti_addrs; 774 } 775 if ((cmd == RTM_ADD && pass == 2) || 776 (cmd == RTM_DELETE && pass == 1)) { 777 struct rt_msghdr rtm; 778 779 if (rt == 0) 780 continue; 781 netmask = rt_mask(rt); 782 dst = sa = rt_key(rt); 783 gate = rt->rt_gateway; 784 bzero(&rtm, sizeof(rtm)); 785 rtm.rtm_index = ifp->if_index; 786 rtm.rtm_flags |= rt->rt_flags; 787 rtm.rtm_errno = error; 788 m = rt_msg1(cmd, &info, (caddr_t)&rtm, sizeof(rtm)); 789 if (m == NULL) 790 continue; 791 mtod(m, struct rt_msghdr *)->rtm_addrs = info.rti_addrs; 792 } 793 route_proto.sp_protocol = sa ? sa->sa_family : 0; 794 raw_input(m, &route_proto, &route_src, &route_dst); 795 } 796 } 797 798 /* 799 * This is called to generate routing socket messages indicating 800 * network interface arrival and departure. 801 */ 802 void 803 rt_ifannouncemsg(ifp, what) 804 struct ifnet *ifp; 805 int what; 806 { 807 struct if_announcemsghdr ifan; 808 struct mbuf *m; 809 struct rt_addrinfo info; 810 811 if (route_cb.any_count == 0) 812 return; 813 bzero(&info, sizeof(info)); 814 bzero(&ifan, sizeof(ifan)); 815 ifan.ifan_index = ifp->if_index; 816 strcpy(ifan.ifan_name, ifp->if_xname); 817 ifan.ifan_what = what; 818 m = rt_msg1(RTM_IFANNOUNCE, &info, (caddr_t)&ifan, sizeof(ifan)); 819 if (m == 0) 820 return; 821 route_proto.sp_protocol = 0; 822 raw_input(m, &route_proto, &route_src, &route_dst); 823 } 824 825 /* 826 * This is used in dumping the kernel table via sysctl(). 827 */ 828 static int 829 sysctl_dumpentry(rn, v) 830 struct radix_node *rn; 831 void *v; 832 { 833 struct walkarg *w = v; 834 struct rtentry *rt = (struct rtentry *)rn; 835 int error = 0, size; 836 struct rt_addrinfo info; 837 838 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 839 return 0; 840 bzero(&info, sizeof(info)); 841 dst = rt_key(rt); 842 gate = rt->rt_gateway; 843 netmask = rt_mask(rt); 844 genmask = rt->rt_genmask; 845 if (rt->rt_ifp) { 846 ifpaddr = rt->rt_ifp->if_addrlist.tqh_first->ifa_addr; 847 ifaaddr = rt->rt_ifa->ifa_addr; 848 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 849 brdaddr = rt->rt_ifa->ifa_dstaddr; 850 } 851 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 852 return (error); 853 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 854 struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 855 856 rtm->rtm_flags = rt->rt_flags; 857 rtm->rtm_use = rt->rt_use; 858 rtm->rtm_rmx = rt->rt_rmx; 859 rtm->rtm_index = rt->rt_ifp->if_index; 860 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 861 rtm->rtm_addrs = info.rti_addrs; 862 if ((error = copyout(rtm, w->w_where, size)) != 0) 863 w->w_where = NULL; 864 else 865 w->w_where += size; 866 } 867 return (error); 868 } 869 870 static int 871 sysctl_iflist(af, w, type) 872 int af; 873 struct walkarg *w; 874 int type; 875 { 876 struct ifnet *ifp; 877 struct ifaddr *ifa; 878 struct rt_addrinfo info; 879 int len, error = 0; 880 881 bzero(&info, sizeof(info)); 882 for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) { 883 if (w->w_arg && w->w_arg != ifp->if_index) 884 continue; 885 ifa = ifp->if_addrlist.tqh_first; 886 ifpaddr = ifa->ifa_addr; 887 switch(type) { 888 case NET_RT_IFLIST: 889 error = 890 rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w, &len); 891 break; 892 #ifdef COMPAT_14 893 case NET_RT_OIFLIST: 894 error = 895 rt_msg2(RTM_OIFINFO, &info, (caddr_t)0, w, &len); 896 break; 897 #endif 898 default: 899 panic("sysctl_iflist(1)"); 900 } 901 if (error) 902 return (error); 903 ifpaddr = 0; 904 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 905 switch(type) { 906 case NET_RT_IFLIST: { 907 struct if_msghdr *ifm; 908 909 ifm = (struct if_msghdr *)w->w_tmem; 910 ifm->ifm_index = ifp->if_index; 911 ifm->ifm_flags = ifp->if_flags; 912 ifm->ifm_data = ifp->if_data; 913 ifm->ifm_addrs = info.rti_addrs; 914 error = copyout(ifm, w->w_where, len); 915 if (error) 916 return (error); 917 w->w_where += len; 918 break; 919 } 920 921 #ifdef COMPAT_14 922 case NET_RT_OIFLIST: { 923 struct if_msghdr14 *ifm; 924 925 ifm = (struct if_msghdr14 *)w->w_tmem; 926 ifm->ifm_index = ifp->if_index; 927 ifm->ifm_flags = ifp->if_flags; 928 ifm->ifm_data.ifi_type = ifp->if_data.ifi_type; 929 ifm->ifm_data.ifi_addrlen = 930 ifp->if_data.ifi_addrlen; 931 ifm->ifm_data.ifi_hdrlen = 932 ifp->if_data.ifi_hdrlen; 933 ifm->ifm_data.ifi_mtu = ifp->if_data.ifi_mtu; 934 ifm->ifm_data.ifi_metric = 935 ifp->if_data.ifi_metric; 936 ifm->ifm_data.ifi_baudrate = 937 ifp->if_data.ifi_baudrate; 938 ifm->ifm_data.ifi_ipackets = 939 ifp->if_data.ifi_ipackets; 940 ifm->ifm_data.ifi_ierrors = 941 ifp->if_data.ifi_ierrors; 942 ifm->ifm_data.ifi_opackets = 943 ifp->if_data.ifi_opackets; 944 ifm->ifm_data.ifi_oerrors = 945 ifp->if_data.ifi_oerrors; 946 ifm->ifm_data.ifi_collisions = 947 ifp->if_data.ifi_collisions; 948 ifm->ifm_data.ifi_ibytes = 949 ifp->if_data.ifi_ibytes; 950 ifm->ifm_data.ifi_obytes = 951 ifp->if_data.ifi_obytes; 952 ifm->ifm_data.ifi_imcasts = 953 ifp->if_data.ifi_imcasts; 954 ifm->ifm_data.ifi_omcasts = 955 ifp->if_data.ifi_omcasts; 956 ifm->ifm_data.ifi_iqdrops = 957 ifp->if_data.ifi_iqdrops; 958 ifm->ifm_data.ifi_noproto = 959 ifp->if_data.ifi_noproto; 960 ifm->ifm_data.ifi_lastchange = 961 ifp->if_data.ifi_lastchange; 962 ifm->ifm_addrs = info.rti_addrs; 963 error = copyout(ifm, w->w_where, len); 964 if (error) 965 return (error); 966 w->w_where += len; 967 break; 968 } 969 #endif 970 default: 971 panic("sysctl_iflist(2)"); 972 } 973 } 974 while ((ifa = ifa->ifa_list.tqe_next) != NULL) { 975 if (af && af != ifa->ifa_addr->sa_family) 976 continue; 977 ifaaddr = ifa->ifa_addr; 978 netmask = ifa->ifa_netmask; 979 brdaddr = ifa->ifa_dstaddr; 980 if ((error = rt_msg2(RTM_NEWADDR, &info, 0, w, &len))) 981 return (error); 982 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 983 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 = copyout(w->w_tmem, w->w_where, len); 991 if (error) 992 return (error); 993 w->w_where += len; 994 } 995 } 996 ifaaddr = netmask = brdaddr = 0; 997 } 998 return (0); 999 } 1000 1001 static int 1002 sysctl_rtable(name, namelen, where, given, new, newlen) 1003 int *name; 1004 u_int namelen; 1005 void *where; 1006 size_t *given; 1007 void *new; 1008 size_t newlen; 1009 { 1010 struct radix_node_head *rnh; 1011 int i, s, error = EINVAL; 1012 u_char af; 1013 struct walkarg w; 1014 1015 if (new) 1016 return (EPERM); 1017 if (namelen != 3) 1018 return (EINVAL); 1019 af = name[0]; 1020 w.w_tmemneeded = 0; 1021 w.w_tmemsize = 0; 1022 w.w_tmem = NULL; 1023 again: 1024 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 1025 if (w.w_tmemneeded) { 1026 w.w_tmem = (caddr_t) malloc(w.w_tmemneeded, M_RTABLE, M_WAITOK); 1027 w.w_tmemsize = w.w_tmemneeded; 1028 w.w_tmemneeded = 0; 1029 } 1030 w.w_op = name[1]; 1031 w.w_arg = name[2]; 1032 w.w_given = *given; 1033 w.w_needed = 0 - w.w_given; 1034 w.w_where = where; 1035 1036 s = splsoftnet(); 1037 switch (w.w_op) { 1038 1039 case NET_RT_DUMP: 1040 case NET_RT_FLAGS: 1041 for (i = 1; i <= AF_MAX; i++) 1042 if ((rnh = rt_tables[i]) && (af == 0 || af == i) && 1043 (error = (*rnh->rnh_walktree)(rnh, 1044 sysctl_dumpentry, &w))) 1045 break; 1046 break; 1047 1048 #ifdef COMPAT_14 1049 case NET_RT_OIFLIST: 1050 error = sysctl_iflist(af, &w, w.w_op); 1051 break; 1052 #endif 1053 1054 case NET_RT_IFLIST: 1055 error = sysctl_iflist(af, &w, w.w_op); 1056 } 1057 splx(s); 1058 1059 /* check to see if we couldn't allocate memory with NOWAIT */ 1060 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 1061 goto again; 1062 1063 if (w.w_tmem) 1064 free(w.w_tmem, M_RTABLE); 1065 w.w_needed += w.w_given; 1066 if (where) { 1067 *given = w.w_where - (caddr_t) where; 1068 if (*given < w.w_needed) 1069 return (ENOMEM); 1070 } else { 1071 *given = (11 * w.w_needed) / 10; 1072 } 1073 return (error); 1074 } 1075 1076 /* 1077 * Definitions of protocols supported in the ROUTE domain. 1078 */ 1079 1080 extern struct domain routedomain; /* or at least forward */ 1081 1082 struct protosw routesw[] = { 1083 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 1084 raw_input, route_output, raw_ctlinput, 0, 1085 route_usrreq, 1086 raw_init, 0, 0, 0, 1087 sysctl_rtable, 1088 } 1089 }; 1090 1091 struct domain routedomain = 1092 { PF_ROUTE, "route", route_init, 0, 0, 1093 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 1094
Indexes created Tue Sep 23 22:09:46 GMT 2025