rtsock.c revision 1.36
1 /* $NetBSD: rtsock.c,v 1.36 2000/03/06 20:49:00 thorpej Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1988, 1991, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)rtsock.c 8.7 (Berkeley) 10/12/95 65 */ 66 67 #include "opt_inet.h" 68 69 #include <sys/param.h> 70 #include <sys/systm.h> 71 #include <sys/proc.h> 72 #include <sys/mbuf.h> 73 #include <sys/socket.h> 74 #include <sys/socketvar.h> 75 #include <sys/domain.h> 76 #include <sys/protosw.h> 77 78 #include <vm/vm.h> 79 #include <sys/sysctl.h> 80 81 #include <net/if.h> 82 #include <net/route.h> 83 #include <net/raw_cb.h> 84 85 #include <machine/stdarg.h> 86 87 struct sockaddr route_dst = { 2, PF_ROUTE, }; 88 struct sockaddr route_src = { 2, PF_ROUTE, }; 89 struct sockproto route_proto = { PF_ROUTE, }; 90 91 struct walkarg { 92 int w_op; 93 int w_arg; 94 int w_given; 95 int w_needed; 96 caddr_t w_where; 97 int w_tmemsize; 98 int w_tmemneeded; 99 caddr_t w_tmem; 100 }; 101 102 static struct mbuf *rt_msg1 __P((int, struct rt_addrinfo *, caddr_t, int)); 103 static int rt_msg2 __P((int, struct rt_addrinfo *, caddr_t, struct walkarg *, 104 int *)); 105 static void rt_xaddrs __P((caddr_t, caddr_t, struct rt_addrinfo *)); 106 static __inline void rt_adjustcount __P((int, int)); 107 108 /* Sleazy use of local variables throughout file, warning!!!! */ 109 #define dst info.rti_info[RTAX_DST] 110 #define gate info.rti_info[RTAX_GATEWAY] 111 #define netmask info.rti_info[RTAX_NETMASK] 112 #define genmask info.rti_info[RTAX_GENMASK] 113 #define ifpaddr info.rti_info[RTAX_IFP] 114 #define ifaaddr info.rti_info[RTAX_IFA] 115 #define brdaddr info.rti_info[RTAX_BRD] 116 117 static __inline void 118 rt_adjustcount(af, cnt) 119 int af, cnt; 120 { 121 route_cb.any_count += cnt; 122 switch (af) { 123 case AF_INET: 124 route_cb.ip_count += cnt; 125 return; 126 #ifdef INET6 127 case AF_INET6: 128 route_cb.ip6_count += cnt; 129 return; 130 #endif 131 case AF_IPX: 132 route_cb.ipx_count += cnt; 133 return; 134 case AF_NS: 135 route_cb.ns_count += cnt; 136 return; 137 case AF_ISO: 138 route_cb.iso_count += cnt; 139 return; 140 } 141 } 142 143 /*ARGSUSED*/ 144 int 145 route_usrreq(so, req, m, nam, control, p) 146 register struct socket *so; 147 int req; 148 struct mbuf *m, *nam, *control; 149 struct proc *p; 150 { 151 register int error = 0; 152 register struct rawcb *rp = sotorawcb(so); 153 int s; 154 155 if (req == PRU_ATTACH) { 156 MALLOC(rp, struct rawcb *, sizeof(*rp), M_PCB, M_WAITOK); 157 if ((so->so_pcb = rp) != NULL) 158 bzero(so->so_pcb, sizeof(*rp)); 159 160 } 161 if (req == PRU_DETACH && rp) 162 rt_adjustcount(rp->rcb_proto.sp_protocol, -1); 163 s = splsoftnet(); 164 165 /* 166 * Don't call raw_usrreq() in the attach case, because 167 * we want to allow non-privileged processes to listen on 168 * and send "safe" commands to the routing socket. 169 */ 170 if (req == PRU_ATTACH) { 171 if (p == 0) 172 error = EACCES; 173 else 174 error = raw_attach(so, (int)(long)nam); 175 } else 176 error = raw_usrreq(so, req, m, nam, control, p); 177 178 rp = sotorawcb(so); 179 if (req == PRU_ATTACH && rp) { 180 if (error) { 181 free((caddr_t)rp, M_PCB); 182 splx(s); 183 return (error); 184 } 185 rt_adjustcount(rp->rcb_proto.sp_protocol, 1); 186 rp->rcb_laddr = &route_src; 187 rp->rcb_faddr = &route_dst; 188 soisconnected(so); 189 so->so_options |= SO_USELOOPBACK; 190 } 191 splx(s); 192 return (error); 193 } 194 195 /*ARGSUSED*/ 196 int 197 #if __STDC__ 198 route_output(struct mbuf *m, ...) 199 #else 200 route_output(m, va_alist) 201 struct mbuf *m; 202 va_dcl 203 #endif 204 { 205 register struct rt_msghdr *rtm = 0; 206 register struct rtentry *rt = 0; 207 struct rtentry *saved_nrt = 0; 208 struct radix_node_head *rnh; 209 struct rt_addrinfo info; 210 int len, error = 0; 211 struct ifnet *ifp = 0; 212 struct ifaddr *ifa = 0; 213 struct socket *so; 214 va_list ap; 215 216 va_start(ap, m); 217 so = va_arg(ap, struct socket *); 218 va_end(ap); 219 220 221 #define senderr(e) { error = e; goto flush;} 222 if (m == 0 || ((m->m_len < sizeof(int32_t)) && 223 (m = m_pullup(m, sizeof(int32_t))) == 0)) 224 return (ENOBUFS); 225 if ((m->m_flags & M_PKTHDR) == 0) 226 panic("route_output"); 227 len = m->m_pkthdr.len; 228 if (len < sizeof(*rtm) || 229 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 230 dst = 0; 231 senderr(EINVAL); 232 } 233 R_Malloc(rtm, struct rt_msghdr *, len); 234 if (rtm == 0) { 235 dst = 0; 236 senderr(ENOBUFS); 237 } 238 m_copydata(m, 0, len, (caddr_t)rtm); 239 if (rtm->rtm_version != RTM_VERSION) { 240 dst = 0; 241 senderr(EPROTONOSUPPORT); 242 } 243 rtm->rtm_pid = curproc->p_pid; 244 info.rti_addrs = rtm->rtm_addrs; 245 rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info); 246 if (dst == 0 || (dst->sa_family >= AF_MAX)) 247 senderr(EINVAL); 248 if (gate != 0 && (gate->sa_family >= AF_MAX)) 249 senderr(EINVAL); 250 if (genmask) { 251 struct radix_node *t; 252 t = rn_addmask((caddr_t)genmask, 0, 1); 253 if (t && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0) 254 genmask = (struct sockaddr *)(t->rn_key); 255 else 256 senderr(ENOBUFS); 257 } 258 259 /* 260 * Verify that the caller has the appropriate privilege; RTM_GET 261 * is the only operation the non-superuser is allowed. 262 */ 263 if (rtm->rtm_type != RTM_GET && 264 suser(curproc->p_ucred, &curproc->p_acflag) != 0) 265 senderr(EACCES); 266 267 switch (rtm->rtm_type) { 268 269 case RTM_ADD: 270 if (gate == 0) 271 senderr(EINVAL); 272 error = rtrequest(RTM_ADD, dst, gate, netmask, 273 rtm->rtm_flags, &saved_nrt); 274 if (error == 0 && saved_nrt) { 275 rt_setmetrics(rtm->rtm_inits, 276 &rtm->rtm_rmx, &saved_nrt->rt_rmx); 277 saved_nrt->rt_refcnt--; 278 saved_nrt->rt_genmask = genmask; 279 } 280 break; 281 282 case RTM_DELETE: 283 error = rtrequest(RTM_DELETE, dst, gate, netmask, 284 rtm->rtm_flags, &saved_nrt); 285 if (error == 0) { 286 (rt = saved_nrt)->rt_refcnt++; 287 goto report; 288 } 289 break; 290 291 case RTM_GET: 292 case RTM_CHANGE: 293 case RTM_LOCK: 294 if ((rnh = rt_tables[dst->sa_family]) == 0) { 295 senderr(EAFNOSUPPORT); 296 } else if ((rt = (struct rtentry *) 297 rnh->rnh_lookup(dst, netmask, rnh)) != NULL) 298 rt->rt_refcnt++; 299 else 300 senderr(ESRCH); 301 switch(rtm->rtm_type) { 302 303 case RTM_GET: 304 report: 305 dst = rt_key(rt); 306 gate = rt->rt_gateway; 307 netmask = rt_mask(rt); 308 genmask = rt->rt_genmask; 309 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 310 if ((ifp = rt->rt_ifp) != NULL) { 311 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 312 ifaaddr = rt->rt_ifa->ifa_addr; 313 if (ifp->if_flags & IFF_POINTOPOINT) 314 brdaddr = rt->rt_ifa->ifa_dstaddr; 315 else 316 brdaddr = 0; 317 rtm->rtm_index = ifp->if_index; 318 } else { 319 ifpaddr = 0; 320 ifaaddr = 0; 321 } 322 } 323 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)0, 324 (struct walkarg *)0, &len); 325 if (len > rtm->rtm_msglen) { 326 struct rt_msghdr *new_rtm; 327 R_Malloc(new_rtm, struct rt_msghdr *, len); 328 if (new_rtm == 0) 329 senderr(ENOBUFS); 330 Bcopy(rtm, new_rtm, rtm->rtm_msglen); 331 Free(rtm); rtm = new_rtm; 332 } 333 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, 334 (struct walkarg *)0, 0); 335 rtm->rtm_flags = rt->rt_flags; 336 rtm->rtm_rmx = rt->rt_rmx; 337 rtm->rtm_addrs = info.rti_addrs; 338 break; 339 340 case RTM_CHANGE: 341 if (gate && rt_setgate(rt, rt_key(rt), gate)) 342 senderr(EDQUOT); 343 /* new gateway could require new ifaddr, ifp; 344 flags may also be different; ifp may be specified 345 by ll sockaddr when protocol address is ambiguous */ 346 if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) && 347 (ifp = ifa->ifa_ifp) && (ifaaddr || gate)) 348 ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate, 349 ifp); 350 else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) || 351 (gate && (ifa = ifa_ifwithroute(rt->rt_flags, 352 rt_key(rt), gate)))) 353 ifp = ifa->ifa_ifp; 354 if (ifa) { 355 register struct ifaddr *oifa = rt->rt_ifa; 356 if (oifa != ifa) { 357 if (oifa && oifa->ifa_rtrequest) 358 oifa->ifa_rtrequest(RTM_DELETE, 359 rt, gate); 360 IFAFREE(rt->rt_ifa); 361 rt->rt_ifa = ifa; 362 IFAREF(rt->rt_ifa); 363 rt->rt_ifp = ifp; 364 } 365 } 366 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 367 &rt->rt_rmx); 368 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 369 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate); 370 if (genmask) 371 rt->rt_genmask = genmask; 372 /* 373 * Fall into 374 */ 375 case RTM_LOCK: 376 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 377 rt->rt_rmx.rmx_locks |= 378 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 379 break; 380 } 381 break; 382 383 default: 384 senderr(EOPNOTSUPP); 385 } 386 387 flush: 388 if (rtm) { 389 if (error) 390 rtm->rtm_errno = error; 391 else 392 rtm->rtm_flags |= RTF_DONE; 393 } 394 if (rt) 395 rtfree(rt); 396 { 397 register struct rawcb *rp = 0; 398 /* 399 * Check to see if we don't want our own messages. 400 */ 401 if ((so->so_options & SO_USELOOPBACK) == 0) { 402 if (route_cb.any_count <= 1) { 403 if (rtm) 404 Free(rtm); 405 m_freem(m); 406 return (error); 407 } 408 /* There is another listener, so construct message */ 409 rp = sotorawcb(so); 410 } 411 if (rtm) { 412 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 413 Free(rtm); 414 } 415 if (rp) 416 rp->rcb_proto.sp_family = 0; /* Avoid us */ 417 if (dst) 418 route_proto.sp_protocol = dst->sa_family; 419 raw_input(m, &route_proto, &route_src, &route_dst); 420 if (rp) 421 rp->rcb_proto.sp_family = PF_ROUTE; 422 } 423 return (error); 424 } 425 426 void 427 rt_setmetrics(which, in, out) 428 u_long which; 429 register struct rt_metrics *in, *out; 430 { 431 #define metric(f, e) if (which & (f)) out->e = in->e; 432 metric(RTV_RPIPE, rmx_recvpipe); 433 metric(RTV_SPIPE, rmx_sendpipe); 434 metric(RTV_SSTHRESH, rmx_ssthresh); 435 metric(RTV_RTT, rmx_rtt); 436 metric(RTV_RTTVAR, rmx_rttvar); 437 metric(RTV_HOPCOUNT, rmx_hopcount); 438 metric(RTV_MTU, rmx_mtu); 439 metric(RTV_EXPIRE, rmx_expire); 440 #undef metric 441 } 442 443 #define ROUNDUP(a) \ 444 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 445 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 446 447 static void 448 rt_xaddrs(cp, cplim, rtinfo) 449 register caddr_t cp, cplim; 450 register struct rt_addrinfo *rtinfo; 451 { 452 register struct sockaddr *sa; 453 register int i; 454 455 bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info)); 456 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 457 if ((rtinfo->rti_addrs & (1 << i)) == 0) 458 continue; 459 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 460 ADVANCE(cp, sa); 461 } 462 } 463 464 static struct mbuf * 465 rt_msg1(type, rtinfo, data, datalen) 466 int type; 467 register struct rt_addrinfo *rtinfo; 468 caddr_t data; 469 int datalen; 470 { 471 register struct rt_msghdr *rtm; 472 register struct mbuf *m; 473 register int i; 474 register struct sockaddr *sa; 475 int len, dlen; 476 477 m = m_gethdr(M_DONTWAIT, MT_DATA); 478 if (m == 0) 479 return (m); 480 switch (type) { 481 482 case RTM_DELADDR: 483 case RTM_NEWADDR: 484 len = sizeof(struct ifa_msghdr); 485 break; 486 487 #ifdef COMPAT_14 488 case RTM_OIFINFO: 489 len = sizeof(struct if_msghdr14); 490 break; 491 #endif 492 493 case RTM_IFINFO: 494 len = sizeof(struct if_msghdr); 495 break; 496 497 case RTM_IFANNOUNCE: 498 len = sizeof(struct if_announcemsghdr); 499 break; 500 501 default: 502 len = sizeof(struct rt_msghdr); 503 } 504 if (len > MHLEN + MLEN) 505 panic("rt_msg1: message too long"); 506 else if (len > MHLEN) { 507 m->m_next = m_get(M_DONTWAIT, MT_DATA); 508 if (m->m_next == NULL) { 509 m_freem(m); 510 return (NULL); 511 } 512 m->m_pkthdr.len = len; 513 m->m_len = MHLEN; 514 m->m_next->m_len = len - MHLEN; 515 } else { 516 m->m_pkthdr.len = m->m_len = len; 517 } 518 m->m_pkthdr.rcvif = 0; 519 m_copyback(m, 0, datalen, data); 520 rtm = mtod(m, struct rt_msghdr *); 521 for (i = 0; i < RTAX_MAX; i++) { 522 if ((sa = rtinfo->rti_info[i]) == NULL) 523 continue; 524 rtinfo->rti_addrs |= (1 << i); 525 dlen = ROUNDUP(sa->sa_len); 526 m_copyback(m, len, dlen, (caddr_t)sa); 527 len += dlen; 528 } 529 rtm->rtm_msglen = len; 530 rtm->rtm_version = RTM_VERSION; 531 rtm->rtm_type = type; 532 return (m); 533 } 534 535 /* 536 * rt_msg2 537 * 538 * fills 'cp' or 'w'.w_tmem with the routing socket message and 539 * returns the length of the message in 'lenp'. 540 * 541 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 542 * the message 543 * otherwise walkarg's w_needed is updated and if the user buffer is 544 * specified and w_needed indicates space exists the information is copied 545 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 546 * if the allocation fails ENOBUFS is returned. 547 */ 548 static int 549 rt_msg2(type, rtinfo, cp, w, lenp) 550 int type; 551 register struct rt_addrinfo *rtinfo; 552 caddr_t cp; 553 struct walkarg *w; 554 int *lenp; 555 { 556 register int i; 557 int len, dlen, second_time = 0; 558 caddr_t cp0; 559 560 rtinfo->rti_addrs = 0; 561 again: 562 switch (type) { 563 564 case RTM_DELADDR: 565 case RTM_NEWADDR: 566 len = sizeof(struct ifa_msghdr); 567 break; 568 #ifdef COMPAT_14 569 case RTM_OIFINFO: 570 len = sizeof(struct if_msghdr14); 571 break; 572 #endif 573 574 case RTM_IFINFO: 575 len = sizeof(struct if_msghdr); 576 break; 577 578 default: 579 len = sizeof(struct rt_msghdr); 580 } 581 if ((cp0 = cp) != NULL) 582 cp += len; 583 for (i = 0; i < RTAX_MAX; i++) { 584 register struct sockaddr *sa; 585 586 if ((sa = rtinfo->rti_info[i]) == 0) 587 continue; 588 rtinfo->rti_addrs |= (1 << i); 589 dlen = ROUNDUP(sa->sa_len); 590 if (cp) { 591 bcopy(sa, cp, (unsigned)dlen); 592 cp += dlen; 593 } 594 len += dlen; 595 } 596 if (cp == 0 && w != NULL && !second_time) { 597 register struct walkarg *rw = w; 598 599 rw->w_needed += len; 600 if (rw->w_needed <= 0 && rw->w_where) { 601 if (rw->w_tmemsize < len) { 602 if (rw->w_tmem) 603 free(rw->w_tmem, M_RTABLE); 604 rw->w_tmem = (caddr_t) malloc(len, M_RTABLE, 605 M_NOWAIT); 606 if (rw->w_tmem) 607 rw->w_tmemsize = len; 608 } 609 if (rw->w_tmem) { 610 cp = rw->w_tmem; 611 second_time = 1; 612 goto again; 613 } else { 614 rw->w_tmemneeded = len; 615 return (ENOBUFS); 616 } 617 } 618 } 619 if (cp) { 620 register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 621 622 rtm->rtm_version = RTM_VERSION; 623 rtm->rtm_type = type; 624 rtm->rtm_msglen = len; 625 } 626 if (lenp) 627 *lenp = len; 628 return (0); 629 } 630 631 /* 632 * This routine is called to generate a message from the routing 633 * socket indicating that a redirect has occured, a routing lookup 634 * has failed, or that a protocol has detected timeouts to a particular 635 * destination. 636 */ 637 void 638 rt_missmsg(type, rtinfo, flags, error) 639 int type, flags, error; 640 register struct rt_addrinfo *rtinfo; 641 { 642 struct rt_msghdr rtm; 643 register struct mbuf *m; 644 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 645 646 if (route_cb.any_count == 0) 647 return; 648 bzero(&rtm, sizeof(rtm)); 649 rtm.rtm_flags = RTF_DONE | flags; 650 rtm.rtm_errno = error; 651 m = rt_msg1(type, rtinfo, (caddr_t)&rtm, sizeof(rtm)); 652 if (m == 0) 653 return; 654 mtod(m, struct rt_msghdr *)->rtm_addrs = rtinfo->rti_addrs; 655 route_proto.sp_protocol = sa ? sa->sa_family : 0; 656 raw_input(m, &route_proto, &route_src, &route_dst); 657 } 658 659 /* 660 * This routine is called to generate a message from the routing 661 * socket indicating that the status of a network interface has changed. 662 */ 663 void 664 rt_ifmsg(ifp) 665 register struct ifnet *ifp; 666 { 667 struct if_msghdr ifm; 668 #ifdef COMPAT_14 669 struct if_msghdr14 oifm; 670 #endif 671 struct mbuf *m; 672 struct rt_addrinfo info; 673 674 if (route_cb.any_count == 0) 675 return; 676 bzero(&info, sizeof(info)); 677 bzero(&ifm, sizeof(ifm)); 678 ifm.ifm_index = ifp->if_index; 679 ifm.ifm_flags = ifp->if_flags; 680 ifm.ifm_data = ifp->if_data; 681 ifm.ifm_addrs = 0; 682 m = rt_msg1(RTM_IFINFO, &info, (caddr_t)&ifm, sizeof(ifm)); 683 if (m == 0) 684 return; 685 route_proto.sp_protocol = 0; 686 raw_input(m, &route_proto, &route_src, &route_dst); 687 #ifdef COMPAT_14 688 bzero(&info, sizeof(info)); 689 bzero(&oifm, sizeof(ifm)); 690 oifm.ifm_index = ifp->if_index; 691 oifm.ifm_flags = ifp->if_flags; 692 oifm.ifm_data.ifi_type = ifp->if_data.ifi_type; 693 oifm.ifm_data.ifi_addrlen = ifp->if_data.ifi_addrlen; 694 oifm.ifm_data.ifi_hdrlen = ifp->if_data.ifi_hdrlen; 695 oifm.ifm_data.ifi_mtu = ifp->if_data.ifi_mtu; 696 oifm.ifm_data.ifi_metric = ifp->if_data.ifi_metric; 697 oifm.ifm_data.ifi_baudrate = ifp->if_data.ifi_baudrate; 698 oifm.ifm_data.ifi_ipackets = ifp->if_data.ifi_ipackets; 699 oifm.ifm_data.ifi_ierrors = ifp->if_data.ifi_ierrors; 700 oifm.ifm_data.ifi_opackets = ifp->if_data.ifi_opackets; 701 oifm.ifm_data.ifi_oerrors = ifp->if_data.ifi_oerrors; 702 oifm.ifm_data.ifi_collisions = ifp->if_data.ifi_collisions; 703 oifm.ifm_data.ifi_ibytes = ifp->if_data.ifi_ibytes; 704 oifm.ifm_data.ifi_obytes = ifp->if_data.ifi_obytes; 705 oifm.ifm_data.ifi_imcasts = ifp->if_data.ifi_imcasts; 706 oifm.ifm_data.ifi_omcasts = ifp->if_data.ifi_omcasts; 707 oifm.ifm_data.ifi_iqdrops = ifp->if_data.ifi_iqdrops; 708 oifm.ifm_data.ifi_noproto = ifp->if_data.ifi_noproto; 709 oifm.ifm_data.ifi_lastchange = ifp->if_data.ifi_lastchange; 710 oifm.ifm_addrs = 0; 711 m = rt_msg1(RTM_OIFINFO, &info, (caddr_t)&oifm, sizeof(oifm)); 712 if (m == 0) 713 return; 714 route_proto.sp_protocol = 0; 715 raw_input(m, &route_proto, &route_src, &route_dst); 716 #endif 717 } 718 719 /* 720 * This is called to generate messages from the routing socket 721 * indicating a network interface has had addresses associated with it. 722 * if we ever reverse the logic and replace messages TO the routing 723 * socket indicate a request to configure interfaces, then it will 724 * be unnecessary as the routing socket will automatically generate 725 * copies of it. 726 */ 727 void 728 rt_newaddrmsg(cmd, ifa, error, rt) 729 int cmd, error; 730 register struct ifaddr *ifa; 731 register struct rtentry *rt; 732 { 733 struct rt_addrinfo info; 734 struct sockaddr *sa = NULL; 735 int pass; 736 struct mbuf *m = NULL; 737 struct ifnet *ifp = ifa->ifa_ifp; 738 739 if (route_cb.any_count == 0) 740 return; 741 for (pass = 1; pass < 3; pass++) { 742 bzero(&info, sizeof(info)); 743 if ((cmd == RTM_ADD && pass == 1) || 744 (cmd == RTM_DELETE && pass == 2)) { 745 struct ifa_msghdr ifam; 746 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 747 748 ifaaddr = sa = ifa->ifa_addr; 749 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 750 netmask = ifa->ifa_netmask; 751 brdaddr = ifa->ifa_dstaddr; 752 bzero(&ifam, sizeof(ifam)); 753 ifam.ifam_index = ifp->if_index; 754 ifam.ifam_metric = ifa->ifa_metric; 755 ifam.ifam_flags = ifa->ifa_flags; 756 m = rt_msg1(ncmd, &info, (caddr_t)&ifam, sizeof(ifam)); 757 if (m == NULL) 758 continue; 759 mtod(m, struct ifa_msghdr *)->ifam_addrs = 760 info.rti_addrs; 761 } 762 if ((cmd == RTM_ADD && pass == 2) || 763 (cmd == RTM_DELETE && pass == 1)) { 764 struct rt_msghdr rtm; 765 766 if (rt == 0) 767 continue; 768 netmask = rt_mask(rt); 769 dst = sa = rt_key(rt); 770 gate = rt->rt_gateway; 771 bzero(&rtm, sizeof(rtm)); 772 rtm.rtm_index = ifp->if_index; 773 rtm.rtm_flags |= rt->rt_flags; 774 rtm.rtm_errno = error; 775 m = rt_msg1(cmd, &info, (caddr_t)&rtm, sizeof(rtm)); 776 if (m == NULL) 777 continue; 778 mtod(m, struct rt_msghdr *)->rtm_addrs = info.rti_addrs; 779 } 780 route_proto.sp_protocol = sa ? sa->sa_family : 0; 781 raw_input(m, &route_proto, &route_src, &route_dst); 782 } 783 } 784 785 /* 786 * This is called to generate routing socket messages indicating 787 * network interface arrival and departure. 788 */ 789 void 790 rt_ifannouncemsg(ifp, what) 791 struct ifnet *ifp; 792 int what; 793 { 794 struct if_announcemsghdr ifan; 795 struct mbuf *m; 796 struct rt_addrinfo info; 797 798 if (route_cb.any_count == 0) 799 return; 800 bzero(&info, sizeof(info)); 801 bzero(&ifan, sizeof(ifan)); 802 ifan.ifan_index = ifp->if_index; 803 strcpy(ifan.ifan_name, ifp->if_xname); 804 ifan.ifan_what = what; 805 m = rt_msg1(RTM_IFANNOUNCE, &info, (caddr_t)&ifan, sizeof(ifan)); 806 if (m == 0) 807 return; 808 route_proto.sp_protocol = 0; 809 raw_input(m, &route_proto, &route_src, &route_dst); 810 } 811 812 /* 813 * This is used in dumping the kernel table via sysctl(). 814 */ 815 int 816 sysctl_dumpentry(rn, v) 817 struct radix_node *rn; 818 register void *v; 819 { 820 register struct walkarg *w = v; 821 register struct rtentry *rt = (struct rtentry *)rn; 822 int error = 0, size; 823 struct rt_addrinfo info; 824 825 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 826 return 0; 827 bzero(&info, sizeof(info)); 828 dst = rt_key(rt); 829 gate = rt->rt_gateway; 830 netmask = rt_mask(rt); 831 genmask = rt->rt_genmask; 832 if (rt->rt_ifp) { 833 ifpaddr = rt->rt_ifp->if_addrlist.tqh_first->ifa_addr; 834 ifaaddr = rt->rt_ifa->ifa_addr; 835 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 836 brdaddr = rt->rt_ifa->ifa_dstaddr; 837 } 838 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 839 return (error); 840 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 841 register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 842 843 rtm->rtm_flags = rt->rt_flags; 844 rtm->rtm_use = rt->rt_use; 845 rtm->rtm_rmx = rt->rt_rmx; 846 rtm->rtm_index = rt->rt_ifp->if_index; 847 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 848 rtm->rtm_addrs = info.rti_addrs; 849 if ((error = copyout(rtm, w->w_where, size)) != 0) 850 w->w_where = NULL; 851 else 852 w->w_where += size; 853 } 854 return (error); 855 } 856 857 int 858 sysctl_iflist(af, w, type) 859 int af; 860 register struct walkarg *w; 861 int type; 862 { 863 register struct ifnet *ifp; 864 register struct ifaddr *ifa; 865 struct rt_addrinfo info; 866 int len, error = 0; 867 868 bzero(&info, sizeof(info)); 869 for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) { 870 if (w->w_arg && w->w_arg != ifp->if_index) 871 continue; 872 ifa = ifp->if_addrlist.tqh_first; 873 ifpaddr = ifa->ifa_addr; 874 switch(type) { 875 case NET_RT_IFLIST: 876 error = 877 rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w, &len); 878 break; 879 #ifdef COMPAT_14 880 case NET_RT_OIFLIST: 881 error = 882 rt_msg2(RTM_OIFINFO, &info, (caddr_t)0, w, &len); 883 break; 884 #endif 885 default: 886 panic("sysctl_iflist(1)"); 887 } 888 if (error) 889 return (error); 890 ifpaddr = 0; 891 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 892 switch(type) { 893 case NET_RT_IFLIST: { 894 register struct if_msghdr *ifm; 895 896 ifm = (struct if_msghdr *)w->w_tmem; 897 ifm->ifm_index = ifp->if_index; 898 ifm->ifm_flags = ifp->if_flags; 899 ifm->ifm_data = ifp->if_data; 900 ifm->ifm_addrs = info.rti_addrs; 901 error = copyout(ifm, w->w_where, len); 902 if (error) 903 return (error); 904 w->w_where += len; 905 break; 906 } 907 908 #ifdef COMPAT_14 909 case NET_RT_OIFLIST: { 910 register struct if_msghdr14 *ifm; 911 912 ifm = (struct if_msghdr14 *)w->w_tmem; 913 ifm->ifm_index = ifp->if_index; 914 ifm->ifm_flags = ifp->if_flags; 915 ifm->ifm_data.ifi_type = ifp->if_data.ifi_type; 916 ifm->ifm_data.ifi_addrlen = 917 ifp->if_data.ifi_addrlen; 918 ifm->ifm_data.ifi_hdrlen = 919 ifp->if_data.ifi_hdrlen; 920 ifm->ifm_data.ifi_mtu = ifp->if_data.ifi_mtu; 921 ifm->ifm_data.ifi_metric = 922 ifp->if_data.ifi_metric; 923 ifm->ifm_data.ifi_baudrate = 924 ifp->if_data.ifi_baudrate; 925 ifm->ifm_data.ifi_ipackets = 926 ifp->if_data.ifi_ipackets; 927 ifm->ifm_data.ifi_ierrors = 928 ifp->if_data.ifi_ierrors; 929 ifm->ifm_data.ifi_opackets = 930 ifp->if_data.ifi_opackets; 931 ifm->ifm_data.ifi_oerrors = 932 ifp->if_data.ifi_oerrors; 933 ifm->ifm_data.ifi_collisions = 934 ifp->if_data.ifi_collisions; 935 ifm->ifm_data.ifi_ibytes = 936 ifp->if_data.ifi_ibytes; 937 ifm->ifm_data.ifi_obytes = 938 ifp->if_data.ifi_obytes; 939 ifm->ifm_data.ifi_imcasts = 940 ifp->if_data.ifi_imcasts; 941 ifm->ifm_data.ifi_omcasts = 942 ifp->if_data.ifi_omcasts; 943 ifm->ifm_data.ifi_iqdrops = 944 ifp->if_data.ifi_iqdrops; 945 ifm->ifm_data.ifi_noproto = 946 ifp->if_data.ifi_noproto; 947 ifm->ifm_data.ifi_lastchange = 948 ifp->if_data.ifi_lastchange; 949 ifm->ifm_addrs = info.rti_addrs; 950 error = copyout(ifm, w->w_where, len); 951 if (error) 952 return (error); 953 w->w_where += len; 954 break; 955 } 956 #endif 957 default: 958 panic("sysctl_iflist(2)"); 959 } 960 } 961 while ((ifa = ifa->ifa_list.tqe_next) != NULL) { 962 if (af && af != ifa->ifa_addr->sa_family) 963 continue; 964 ifaaddr = ifa->ifa_addr; 965 netmask = ifa->ifa_netmask; 966 brdaddr = ifa->ifa_dstaddr; 967 if ((error = rt_msg2(RTM_NEWADDR, &info, 0, w, &len))) 968 return (error); 969 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 970 register struct ifa_msghdr *ifam; 971 972 ifam = (struct ifa_msghdr *)w->w_tmem; 973 ifam->ifam_index = ifa->ifa_ifp->if_index; 974 ifam->ifam_flags = ifa->ifa_flags; 975 ifam->ifam_metric = ifa->ifa_metric; 976 ifam->ifam_addrs = info.rti_addrs; 977 error = copyout(w->w_tmem, w->w_where, len); 978 if (error) 979 return (error); 980 w->w_where += len; 981 } 982 } 983 ifaaddr = netmask = brdaddr = 0; 984 } 985 return (0); 986 } 987 988 int 989 sysctl_rtable(name, namelen, where, given, new, newlen) 990 int *name; 991 u_int namelen; 992 void *where; 993 size_t *given; 994 void *new; 995 size_t newlen; 996 { 997 register struct radix_node_head *rnh; 998 int i, s, error = EINVAL; 999 u_char af; 1000 struct walkarg w; 1001 1002 if (new) 1003 return (EPERM); 1004 if (namelen != 3) 1005 return (EINVAL); 1006 af = name[0]; 1007 w.w_tmemneeded = 0; 1008 w.w_tmemsize = 0; 1009 w.w_tmem = NULL; 1010 again: 1011 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 1012 if (w.w_tmemneeded) { 1013 w.w_tmem = (caddr_t) malloc(w.w_tmemneeded, M_RTABLE, M_WAITOK); 1014 w.w_tmemsize = w.w_tmemneeded; 1015 w.w_tmemneeded = 0; 1016 } 1017 w.w_op = name[1]; 1018 w.w_arg = name[2]; 1019 w.w_given = *given; 1020 w.w_needed = 0 - w.w_given; 1021 w.w_where = where; 1022 1023 s = splsoftnet(); 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 #ifdef COMPAT_14 1036 case NET_RT_OIFLIST: 1037 error = sysctl_iflist(af, &w, w.w_op); 1038 break; 1039 #endif 1040 1041 case NET_RT_IFLIST: 1042 error = sysctl_iflist(af, &w, w.w_op); 1043 } 1044 splx(s); 1045 1046 /* check to see if we couldn't allocate memory with NOWAIT */ 1047 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 1048 goto again; 1049 1050 if (w.w_tmem) 1051 free(w.w_tmem, M_RTABLE); 1052 w.w_needed += w.w_given; 1053 if (where) { 1054 *given = w.w_where - (caddr_t) where; 1055 if (*given < w.w_needed) 1056 return (ENOMEM); 1057 } else { 1058 *given = (11 * w.w_needed) / 10; 1059 } 1060 return (error); 1061 } 1062 1063 /* 1064 * Definitions of protocols supported in the ROUTE domain. 1065 */ 1066 1067 extern struct domain routedomain; /* or at least forward */ 1068 1069 struct protosw routesw[] = { 1070 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 1071 raw_input, route_output, raw_ctlinput, 0, 1072 route_usrreq, 1073 raw_init, 0, 0, 0, 1074 sysctl_rtable, 1075 } 1076 }; 1077 1078 struct domain routedomain = 1079 { PF_ROUTE, "route", route_init, 0, 0, 1080 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 1081
Indexes created Fri Oct 03 02:09:57 GMT 2025