rtsock.c revision 1.35
1 /* $NetBSD: rtsock.c,v 1.35 2000/02/17 04:28:00 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 <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 default: 498 len = sizeof(struct rt_msghdr); 499 } 500 if (len > MHLEN + MLEN) 501 panic("rt_msg1: message too long"); 502 else if (len > MHLEN) { 503 m->m_next = m_get(M_DONTWAIT, MT_DATA); 504 if (m->m_next == NULL) { 505 m_freem(m); 506 return (NULL); 507 } 508 m->m_pkthdr.len = len; 509 m->m_len = MHLEN; 510 m->m_next->m_len = len - MHLEN; 511 } else { 512 m->m_pkthdr.len = m->m_len = len; 513 } 514 m->m_pkthdr.rcvif = 0; 515 m_copyback(m, 0, datalen, data); 516 rtm = mtod(m, struct rt_msghdr *); 517 for (i = 0; i < RTAX_MAX; i++) { 518 if ((sa = rtinfo->rti_info[i]) == NULL) 519 continue; 520 rtinfo->rti_addrs |= (1 << i); 521 dlen = ROUNDUP(sa->sa_len); 522 m_copyback(m, len, dlen, (caddr_t)sa); 523 len += dlen; 524 } 525 rtm->rtm_msglen = len; 526 rtm->rtm_version = RTM_VERSION; 527 rtm->rtm_type = type; 528 return (m); 529 } 530 531 /* 532 * rt_msg2 533 * 534 * fills 'cp' or 'w'.w_tmem with the routing socket message and 535 * returns the length of the message in 'lenp'. 536 * 537 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 538 * the message 539 * otherwise walkarg's w_needed is updated and if the user buffer is 540 * specified and w_needed indicates space exists the information is copied 541 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 542 * if the allocation fails ENOBUFS is returned. 543 */ 544 static int 545 rt_msg2(type, rtinfo, cp, w, lenp) 546 int type; 547 register struct rt_addrinfo *rtinfo; 548 caddr_t cp; 549 struct walkarg *w; 550 int *lenp; 551 { 552 register int i; 553 int len, dlen, second_time = 0; 554 caddr_t cp0; 555 556 rtinfo->rti_addrs = 0; 557 again: 558 switch (type) { 559 560 case RTM_DELADDR: 561 case RTM_NEWADDR: 562 len = sizeof(struct ifa_msghdr); 563 break; 564 #ifdef COMPAT_14 565 case RTM_OIFINFO: 566 len = sizeof(struct if_msghdr14); 567 break; 568 #endif 569 570 case RTM_IFINFO: 571 len = sizeof(struct if_msghdr); 572 break; 573 574 default: 575 len = sizeof(struct rt_msghdr); 576 } 577 if ((cp0 = cp) != NULL) 578 cp += len; 579 for (i = 0; i < RTAX_MAX; i++) { 580 register struct sockaddr *sa; 581 582 if ((sa = rtinfo->rti_info[i]) == 0) 583 continue; 584 rtinfo->rti_addrs |= (1 << i); 585 dlen = ROUNDUP(sa->sa_len); 586 if (cp) { 587 bcopy(sa, cp, (unsigned)dlen); 588 cp += dlen; 589 } 590 len += dlen; 591 } 592 if (cp == 0 && w != NULL && !second_time) { 593 register struct walkarg *rw = w; 594 595 rw->w_needed += len; 596 if (rw->w_needed <= 0 && rw->w_where) { 597 if (rw->w_tmemsize < len) { 598 if (rw->w_tmem) 599 free(rw->w_tmem, M_RTABLE); 600 rw->w_tmem = (caddr_t) malloc(len, M_RTABLE, 601 M_NOWAIT); 602 if (rw->w_tmem) 603 rw->w_tmemsize = len; 604 } 605 if (rw->w_tmem) { 606 cp = rw->w_tmem; 607 second_time = 1; 608 goto again; 609 } else { 610 rw->w_tmemneeded = len; 611 return (ENOBUFS); 612 } 613 } 614 } 615 if (cp) { 616 register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 617 618 rtm->rtm_version = RTM_VERSION; 619 rtm->rtm_type = type; 620 rtm->rtm_msglen = len; 621 } 622 if (lenp) 623 *lenp = len; 624 return (0); 625 } 626 627 /* 628 * This routine is called to generate a message from the routing 629 * socket indicating that a redirect has occured, a routing lookup 630 * has failed, or that a protocol has detected timeouts to a particular 631 * destination. 632 */ 633 void 634 rt_missmsg(type, rtinfo, flags, error) 635 int type, flags, error; 636 register struct rt_addrinfo *rtinfo; 637 { 638 struct rt_msghdr rtm; 639 register struct mbuf *m; 640 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 641 642 if (route_cb.any_count == 0) 643 return; 644 bzero(&rtm, sizeof(rtm)); 645 rtm.rtm_flags = RTF_DONE | flags; 646 rtm.rtm_errno = error; 647 m = rt_msg1(type, rtinfo, (caddr_t)&rtm, sizeof(rtm)); 648 if (m == 0) 649 return; 650 mtod(m, struct rt_msghdr *)->rtm_addrs = rtinfo->rti_addrs; 651 route_proto.sp_protocol = sa ? sa->sa_family : 0; 652 raw_input(m, &route_proto, &route_src, &route_dst); 653 } 654 655 /* 656 * This routine is called to generate a message from the routing 657 * socket indicating that the status of a network interface has changed. 658 */ 659 void 660 rt_ifmsg(ifp) 661 register struct ifnet *ifp; 662 { 663 struct if_msghdr ifm; 664 #ifdef COMPAT_14 665 struct if_msghdr14 oifm; 666 #endif 667 struct mbuf *m; 668 struct rt_addrinfo info; 669 670 if (route_cb.any_count == 0) 671 return; 672 bzero(&info, sizeof(info)); 673 bzero(&ifm, sizeof(ifm)); 674 ifm.ifm_index = ifp->if_index; 675 ifm.ifm_flags = ifp->if_flags; 676 ifm.ifm_data = ifp->if_data; 677 ifm.ifm_addrs = 0; 678 m = rt_msg1(RTM_IFINFO, &info, (caddr_t)&ifm, sizeof(ifm)); 679 if (m == 0) 680 return; 681 route_proto.sp_protocol = 0; 682 raw_input(m, &route_proto, &route_src, &route_dst); 683 #ifdef COMPAT_14 684 bzero(&info, sizeof(info)); 685 bzero(&oifm, sizeof(ifm)); 686 oifm.ifm_index = ifp->if_index; 687 oifm.ifm_flags = ifp->if_flags; 688 oifm.ifm_data.ifi_type = ifp->if_data.ifi_type; 689 oifm.ifm_data.ifi_addrlen = ifp->if_data.ifi_addrlen; 690 oifm.ifm_data.ifi_hdrlen = ifp->if_data.ifi_hdrlen; 691 oifm.ifm_data.ifi_mtu = ifp->if_data.ifi_mtu; 692 oifm.ifm_data.ifi_metric = ifp->if_data.ifi_metric; 693 oifm.ifm_data.ifi_baudrate = ifp->if_data.ifi_baudrate; 694 oifm.ifm_data.ifi_ipackets = ifp->if_data.ifi_ipackets; 695 oifm.ifm_data.ifi_ierrors = ifp->if_data.ifi_ierrors; 696 oifm.ifm_data.ifi_opackets = ifp->if_data.ifi_opackets; 697 oifm.ifm_data.ifi_oerrors = ifp->if_data.ifi_oerrors; 698 oifm.ifm_data.ifi_collisions = ifp->if_data.ifi_collisions; 699 oifm.ifm_data.ifi_ibytes = ifp->if_data.ifi_ibytes; 700 oifm.ifm_data.ifi_obytes = ifp->if_data.ifi_obytes; 701 oifm.ifm_data.ifi_imcasts = ifp->if_data.ifi_imcasts; 702 oifm.ifm_data.ifi_omcasts = ifp->if_data.ifi_omcasts; 703 oifm.ifm_data.ifi_iqdrops = ifp->if_data.ifi_iqdrops; 704 oifm.ifm_data.ifi_noproto = ifp->if_data.ifi_noproto; 705 oifm.ifm_data.ifi_lastchange = ifp->if_data.ifi_lastchange; 706 oifm.ifm_addrs = 0; 707 m = rt_msg1(RTM_OIFINFO, &info, (caddr_t)&oifm, sizeof(oifm)); 708 if (m == 0) 709 return; 710 route_proto.sp_protocol = 0; 711 raw_input(m, &route_proto, &route_src, &route_dst); 712 #endif 713 } 714 715 /* 716 * This is called to generate messages from the routing socket 717 * indicating a network interface has had addresses associated with it. 718 * if we ever reverse the logic and replace messages TO the routing 719 * socket indicate a request to configure interfaces, then it will 720 * be unnecessary as the routing socket will automatically generate 721 * copies of it. 722 */ 723 void 724 rt_newaddrmsg(cmd, ifa, error, rt) 725 int cmd, error; 726 register struct ifaddr *ifa; 727 register struct rtentry *rt; 728 { 729 struct rt_addrinfo info; 730 struct sockaddr *sa = NULL; 731 int pass; 732 struct mbuf *m = NULL; 733 struct ifnet *ifp = ifa->ifa_ifp; 734 735 if (route_cb.any_count == 0) 736 return; 737 for (pass = 1; pass < 3; pass++) { 738 bzero(&info, sizeof(info)); 739 if ((cmd == RTM_ADD && pass == 1) || 740 (cmd == RTM_DELETE && pass == 2)) { 741 struct ifa_msghdr ifam; 742 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 743 744 ifaaddr = sa = ifa->ifa_addr; 745 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 746 netmask = ifa->ifa_netmask; 747 brdaddr = ifa->ifa_dstaddr; 748 bzero(&ifam, sizeof(ifam)); 749 ifam.ifam_index = ifp->if_index; 750 ifam.ifam_metric = ifa->ifa_metric; 751 ifam.ifam_flags = ifa->ifa_flags; 752 m = rt_msg1(ncmd, &info, (caddr_t)&ifam, sizeof(ifam)); 753 if (m == NULL) 754 continue; 755 mtod(m, struct ifa_msghdr *)->ifam_addrs = 756 info.rti_addrs; 757 } 758 if ((cmd == RTM_ADD && pass == 2) || 759 (cmd == RTM_DELETE && pass == 1)) { 760 struct rt_msghdr rtm; 761 762 if (rt == 0) 763 continue; 764 netmask = rt_mask(rt); 765 dst = sa = rt_key(rt); 766 gate = rt->rt_gateway; 767 bzero(&rtm, sizeof(rtm)); 768 rtm.rtm_index = ifp->if_index; 769 rtm.rtm_flags |= rt->rt_flags; 770 rtm.rtm_errno = error; 771 m = rt_msg1(cmd, &info, (caddr_t)&rtm, sizeof(rtm)); 772 if (m == NULL) 773 continue; 774 mtod(m, struct rt_msghdr *)->rtm_addrs = info.rti_addrs; 775 } 776 route_proto.sp_protocol = sa ? sa->sa_family : 0; 777 raw_input(m, &route_proto, &route_src, &route_dst); 778 } 779 } 780 781 /* 782 * This is used in dumping the kernel table via sysctl(). 783 */ 784 int 785 sysctl_dumpentry(rn, v) 786 struct radix_node *rn; 787 register void *v; 788 { 789 register struct walkarg *w = v; 790 register struct rtentry *rt = (struct rtentry *)rn; 791 int error = 0, size; 792 struct rt_addrinfo info; 793 794 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 795 return 0; 796 bzero(&info, sizeof(info)); 797 dst = rt_key(rt); 798 gate = rt->rt_gateway; 799 netmask = rt_mask(rt); 800 genmask = rt->rt_genmask; 801 if (rt->rt_ifp) { 802 ifpaddr = rt->rt_ifp->if_addrlist.tqh_first->ifa_addr; 803 ifaaddr = rt->rt_ifa->ifa_addr; 804 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 805 brdaddr = rt->rt_ifa->ifa_dstaddr; 806 } 807 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 808 return (error); 809 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 810 register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 811 812 rtm->rtm_flags = rt->rt_flags; 813 rtm->rtm_use = rt->rt_use; 814 rtm->rtm_rmx = rt->rt_rmx; 815 rtm->rtm_index = rt->rt_ifp->if_index; 816 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 817 rtm->rtm_addrs = info.rti_addrs; 818 if ((error = copyout(rtm, w->w_where, size)) != 0) 819 w->w_where = NULL; 820 else 821 w->w_where += size; 822 } 823 return (error); 824 } 825 826 int 827 sysctl_iflist(af, w, type) 828 int af; 829 register struct walkarg *w; 830 int type; 831 { 832 register struct ifnet *ifp; 833 register struct ifaddr *ifa; 834 struct rt_addrinfo info; 835 int len, error = 0; 836 837 bzero(&info, sizeof(info)); 838 for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) { 839 if (w->w_arg && w->w_arg != ifp->if_index) 840 continue; 841 ifa = ifp->if_addrlist.tqh_first; 842 ifpaddr = ifa->ifa_addr; 843 switch(type) { 844 case NET_RT_IFLIST: 845 error = 846 rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w, &len); 847 break; 848 #ifdef COMPAT_14 849 case NET_RT_OIFLIST: 850 error = 851 rt_msg2(RTM_OIFINFO, &info, (caddr_t)0, w, &len); 852 break; 853 #endif 854 default: 855 panic("sysctl_iflist(1)"); 856 } 857 if (error) 858 return (error); 859 ifpaddr = 0; 860 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 861 switch(type) { 862 case NET_RT_IFLIST: { 863 register struct if_msghdr *ifm; 864 865 ifm = (struct if_msghdr *)w->w_tmem; 866 ifm->ifm_index = ifp->if_index; 867 ifm->ifm_flags = ifp->if_flags; 868 ifm->ifm_data = ifp->if_data; 869 ifm->ifm_addrs = info.rti_addrs; 870 error = copyout(ifm, w->w_where, len); 871 if (error) 872 return (error); 873 w->w_where += len; 874 break; 875 } 876 877 #ifdef COMPAT_14 878 case NET_RT_OIFLIST: { 879 register struct if_msghdr14 *ifm; 880 881 ifm = (struct if_msghdr14 *)w->w_tmem; 882 ifm->ifm_index = ifp->if_index; 883 ifm->ifm_flags = ifp->if_flags; 884 ifm->ifm_data.ifi_type = ifp->if_data.ifi_type; 885 ifm->ifm_data.ifi_addrlen = 886 ifp->if_data.ifi_addrlen; 887 ifm->ifm_data.ifi_hdrlen = 888 ifp->if_data.ifi_hdrlen; 889 ifm->ifm_data.ifi_mtu = ifp->if_data.ifi_mtu; 890 ifm->ifm_data.ifi_metric = 891 ifp->if_data.ifi_metric; 892 ifm->ifm_data.ifi_baudrate = 893 ifp->if_data.ifi_baudrate; 894 ifm->ifm_data.ifi_ipackets = 895 ifp->if_data.ifi_ipackets; 896 ifm->ifm_data.ifi_ierrors = 897 ifp->if_data.ifi_ierrors; 898 ifm->ifm_data.ifi_opackets = 899 ifp->if_data.ifi_opackets; 900 ifm->ifm_data.ifi_oerrors = 901 ifp->if_data.ifi_oerrors; 902 ifm->ifm_data.ifi_collisions = 903 ifp->if_data.ifi_collisions; 904 ifm->ifm_data.ifi_ibytes = 905 ifp->if_data.ifi_ibytes; 906 ifm->ifm_data.ifi_obytes = 907 ifp->if_data.ifi_obytes; 908 ifm->ifm_data.ifi_imcasts = 909 ifp->if_data.ifi_imcasts; 910 ifm->ifm_data.ifi_omcasts = 911 ifp->if_data.ifi_omcasts; 912 ifm->ifm_data.ifi_iqdrops = 913 ifp->if_data.ifi_iqdrops; 914 ifm->ifm_data.ifi_noproto = 915 ifp->if_data.ifi_noproto; 916 ifm->ifm_data.ifi_lastchange = 917 ifp->if_data.ifi_lastchange; 918 ifm->ifm_addrs = info.rti_addrs; 919 error = copyout(ifm, w->w_where, len); 920 if (error) 921 return (error); 922 w->w_where += len; 923 break; 924 } 925 #endif 926 default: 927 panic("sysctl_iflist(2)"); 928 } 929 } 930 while ((ifa = ifa->ifa_list.tqe_next) != NULL) { 931 if (af && af != ifa->ifa_addr->sa_family) 932 continue; 933 ifaaddr = ifa->ifa_addr; 934 netmask = ifa->ifa_netmask; 935 brdaddr = ifa->ifa_dstaddr; 936 if ((error = rt_msg2(RTM_NEWADDR, &info, 0, w, &len))) 937 return (error); 938 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 939 register struct ifa_msghdr *ifam; 940 941 ifam = (struct ifa_msghdr *)w->w_tmem; 942 ifam->ifam_index = ifa->ifa_ifp->if_index; 943 ifam->ifam_flags = ifa->ifa_flags; 944 ifam->ifam_metric = ifa->ifa_metric; 945 ifam->ifam_addrs = info.rti_addrs; 946 error = copyout(w->w_tmem, w->w_where, len); 947 if (error) 948 return (error); 949 w->w_where += len; 950 } 951 } 952 ifaaddr = netmask = brdaddr = 0; 953 } 954 return (0); 955 } 956 957 int 958 sysctl_rtable(name, namelen, where, given, new, newlen) 959 int *name; 960 u_int namelen; 961 void *where; 962 size_t *given; 963 void *new; 964 size_t newlen; 965 { 966 register struct radix_node_head *rnh; 967 int i, s, error = EINVAL; 968 u_char af; 969 struct walkarg w; 970 971 if (new) 972 return (EPERM); 973 if (namelen != 3) 974 return (EINVAL); 975 af = name[0]; 976 w.w_tmemneeded = 0; 977 w.w_tmemsize = 0; 978 w.w_tmem = NULL; 979 again: 980 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 981 if (w.w_tmemneeded) { 982 w.w_tmem = (caddr_t) malloc(w.w_tmemneeded, M_RTABLE, M_WAITOK); 983 w.w_tmemsize = w.w_tmemneeded; 984 w.w_tmemneeded = 0; 985 } 986 w.w_op = name[1]; 987 w.w_arg = name[2]; 988 w.w_given = *given; 989 w.w_needed = 0 - w.w_given; 990 w.w_where = where; 991 992 s = splsoftnet(); 993 switch (w.w_op) { 994 995 case NET_RT_DUMP: 996 case NET_RT_FLAGS: 997 for (i = 1; i <= AF_MAX; i++) 998 if ((rnh = rt_tables[i]) && (af == 0 || af == i) && 999 (error = (*rnh->rnh_walktree)(rnh, 1000 sysctl_dumpentry, &w))) 1001 break; 1002 break; 1003 1004 #ifdef COMPAT_14 1005 case NET_RT_OIFLIST: 1006 error = sysctl_iflist(af, &w, w.w_op); 1007 break; 1008 #endif 1009 1010 case NET_RT_IFLIST: 1011 error = sysctl_iflist(af, &w, w.w_op); 1012 } 1013 splx(s); 1014 1015 /* check to see if we couldn't allocate memory with NOWAIT */ 1016 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 1017 goto again; 1018 1019 if (w.w_tmem) 1020 free(w.w_tmem, M_RTABLE); 1021 w.w_needed += w.w_given; 1022 if (where) { 1023 *given = w.w_where - (caddr_t) where; 1024 if (*given < w.w_needed) 1025 return (ENOMEM); 1026 } else { 1027 *given = (11 * w.w_needed) / 10; 1028 } 1029 return (error); 1030 } 1031 1032 /* 1033 * Definitions of protocols supported in the ROUTE domain. 1034 */ 1035 1036 extern struct domain routedomain; /* or at least forward */ 1037 1038 struct protosw routesw[] = { 1039 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 1040 raw_input, route_output, raw_ctlinput, 0, 1041 route_usrreq, 1042 raw_init, 0, 0, 0, 1043 sysctl_rtable, 1044 } 1045 }; 1046 1047 struct domain routedomain = 1048 { PF_ROUTE, "route", route_init, 0, 0, 1049 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 1050
Indexes created Fri Oct 03 02:09:57 GMT 2025