rtsock.c revision 1.45.2.3
1 /* $NetBSD: rtsock.c,v 1.45.2.3 2001/08/24 00:12:19 nathanw 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/lwp.h> 72 #include <sys/proc.h> 73 #include <sys/mbuf.h> 74 #include <sys/socket.h> 75 #include <sys/socketvar.h> 76 #include <sys/domain.h> 77 #include <sys/protosw.h> 78 79 #include <uvm/uvm_extern.h> 80 81 #include <sys/sysctl.h> 82 83 #include <net/if.h> 84 #include <net/route.h> 85 #include <net/raw_cb.h> 86 87 #include <machine/stdarg.h> 88 89 struct sockaddr route_dst = { 2, PF_ROUTE, }; 90 struct sockaddr route_src = { 2, PF_ROUTE, }; 91 struct sockproto route_proto = { PF_ROUTE, }; 92 93 struct walkarg { 94 int w_op; 95 int w_arg; 96 int w_given; 97 int w_needed; 98 caddr_t w_where; 99 int w_tmemsize; 100 int w_tmemneeded; 101 caddr_t w_tmem; 102 }; 103 104 static struct mbuf *rt_msg1 __P((int, struct rt_addrinfo *, caddr_t, int)); 105 static int rt_msg2 __P((int, struct rt_addrinfo *, caddr_t, struct walkarg *, 106 int *)); 107 static int rt_xaddrs __P((caddr_t, caddr_t, struct rt_addrinfo *)); 108 static int sysctl_dumpentry __P((struct radix_node *, void *)); 109 static int sysctl_iflist __P((int, struct walkarg *, int)); 110 static int sysctl_rtable __P((int *, u_int, void *, size_t *, void *, size_t)); 111 static __inline void rt_adjustcount __P((int, int)); 112 113 /* Sleazy use of local variables throughout file, warning!!!! */ 114 #define dst info.rti_info[RTAX_DST] 115 #define gate info.rti_info[RTAX_GATEWAY] 116 #define netmask info.rti_info[RTAX_NETMASK] 117 #define genmask info.rti_info[RTAX_GENMASK] 118 #define ifpaddr info.rti_info[RTAX_IFP] 119 #define ifaaddr info.rti_info[RTAX_IFA] 120 #define brdaddr info.rti_info[RTAX_BRD] 121 122 static __inline void 123 rt_adjustcount(af, cnt) 124 int af, cnt; 125 { 126 route_cb.any_count += cnt; 127 switch (af) { 128 case AF_INET: 129 route_cb.ip_count += cnt; 130 return; 131 #ifdef INET6 132 case AF_INET6: 133 route_cb.ip6_count += cnt; 134 return; 135 #endif 136 case AF_IPX: 137 route_cb.ipx_count += cnt; 138 return; 139 case AF_NS: 140 route_cb.ns_count += cnt; 141 return; 142 case AF_ISO: 143 route_cb.iso_count += cnt; 144 return; 145 } 146 } 147 148 /*ARGSUSED*/ 149 int 150 route_usrreq(so, req, m, nam, control, p) 151 struct socket *so; 152 int req; 153 struct mbuf *m, *nam, *control; 154 struct proc *p; 155 { 156 int error = 0; 157 struct rawcb *rp = sotorawcb(so); 158 int s; 159 160 if (req == PRU_ATTACH) { 161 MALLOC(rp, struct rawcb *, sizeof(*rp), M_PCB, M_WAITOK); 162 if ((so->so_pcb = rp) != NULL) 163 memset(so->so_pcb, 0, sizeof(*rp)); 164 165 } 166 if (req == PRU_DETACH && rp) 167 rt_adjustcount(rp->rcb_proto.sp_protocol, -1); 168 s = splsoftnet(); 169 170 /* 171 * Don't call raw_usrreq() in the attach case, because 172 * we want to allow non-privileged processes to listen on 173 * and send "safe" commands to the routing socket. 174 */ 175 if (req == PRU_ATTACH) { 176 if (p == 0) 177 error = EACCES; 178 else 179 error = raw_attach(so, (int)(long)nam); 180 } else 181 error = raw_usrreq(so, req, m, nam, control, p); 182 183 rp = sotorawcb(so); 184 if (req == PRU_ATTACH && rp) { 185 if (error) { 186 free((caddr_t)rp, M_PCB); 187 splx(s); 188 return (error); 189 } 190 rt_adjustcount(rp->rcb_proto.sp_protocol, 1); 191 rp->rcb_laddr = &route_src; 192 rp->rcb_faddr = &route_dst; 193 soisconnected(so); 194 so->so_options |= SO_USELOOPBACK; 195 } 196 splx(s); 197 return (error); 198 } 199 200 /*ARGSUSED*/ 201 int 202 #if __STDC__ 203 route_output(struct mbuf *m, ...) 204 #else 205 route_output(m, va_alist) 206 struct mbuf *m; 207 va_dcl 208 #endif 209 { 210 struct rt_msghdr *rtm = 0; 211 struct radix_node *rn = 0; 212 struct rtentry *rt = 0; 213 struct rtentry *saved_nrt = 0; 214 struct radix_node_head *rnh; 215 struct rt_addrinfo info; 216 int len, error = 0; 217 struct ifnet *ifp = 0; 218 struct ifaddr *ifa = 0; 219 struct socket *so; 220 va_list ap; 221 222 va_start(ap, m); 223 so = va_arg(ap, struct socket *); 224 va_end(ap); 225 226 #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->l->proc->p_pid; 249 memset(&info, 0, sizeof(info)); 250 info.rti_addrs = rtm->rtm_addrs; 251 if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) 252 senderr(EINVAL); 253 info.rti_flags = rtm->rtm_flags; 254 if (dst == 0 || (dst->sa_family >= AF_MAX)) 255 senderr(EINVAL); 256 if (gate != 0 && (gate->sa_family >= AF_MAX)) 257 senderr(EINVAL); 258 if (genmask) { 259 struct radix_node *t; 260 t = rn_addmask((caddr_t)genmask, 0, 1); 261 if (t && genmask->sa_len >= ((struct sockaddr *)t->rn_key)->sa_len && 262 Bcmp((caddr_t *)genmask + 1, (caddr_t *)t->rn_key + 1, 263 ((struct sockaddr *)t->rn_key)->sa_len) - 1) 264 genmask = (struct sockaddr *)(t->rn_key); 265 else 266 senderr(ENOBUFS); 267 } 268 269 /* 270 * Verify that the caller has the appropriate privilege; RTM_GET 271 * is the only operation the non-superuser is allowed. 272 */ 273 if (rtm->rtm_type != RTM_GET && 274 suser(curproc->l_proc->p_ucred, &curproc->l_proc->p_acflag) != 0) 275 senderr(EACCES); 276 277 switch (rtm->rtm_type) { 278 279 case RTM_ADD: 280 if (gate == 0) 281 senderr(EINVAL); 282 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 283 if (error == 0 && saved_nrt) { 284 rt_setmetrics(rtm->rtm_inits, 285 &rtm->rtm_rmx, &saved_nrt->rt_rmx); 286 saved_nrt->rt_refcnt--; 287 saved_nrt->rt_genmask = genmask; 288 } 289 break; 290 291 case RTM_DELETE: 292 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 293 if (error == 0) { 294 (rt = saved_nrt)->rt_refcnt++; 295 goto report; 296 } 297 break; 298 299 case RTM_GET: 300 case RTM_CHANGE: 301 case RTM_LOCK: 302 if ((rnh = rt_tables[dst->sa_family]) == 0) { 303 senderr(EAFNOSUPPORT); 304 } 305 rn = rnh->rnh_lookup(dst, netmask, rnh); 306 if (rn == NULL || (rn->rn_flags & RNF_ROOT) != 0) { 307 senderr(ESRCH); 308 } 309 rt = (struct rtentry *)rn; 310 rt->rt_refcnt++; 311 312 switch(rtm->rtm_type) { 313 314 case RTM_GET: 315 report: 316 dst = rt_key(rt); 317 gate = rt->rt_gateway; 318 netmask = rt_mask(rt); 319 genmask = rt->rt_genmask; 320 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 321 if ((ifp = rt->rt_ifp) != NULL) { 322 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 323 ifaaddr = rt->rt_ifa->ifa_addr; 324 if (ifp->if_flags & IFF_POINTOPOINT) 325 brdaddr = rt->rt_ifa->ifa_dstaddr; 326 else 327 brdaddr = 0; 328 rtm->rtm_index = ifp->if_index; 329 } else { 330 ifpaddr = 0; 331 ifaaddr = 0; 332 } 333 } 334 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)0, 335 (struct walkarg *)0, &len); 336 if (len > rtm->rtm_msglen) { 337 struct rt_msghdr *new_rtm; 338 R_Malloc(new_rtm, struct rt_msghdr *, len); 339 if (new_rtm == 0) 340 senderr(ENOBUFS); 341 Bcopy(rtm, new_rtm, rtm->rtm_msglen); 342 Free(rtm); rtm = new_rtm; 343 } 344 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, 345 (struct walkarg *)0, 0); 346 rtm->rtm_flags = rt->rt_flags; 347 rtm->rtm_rmx = rt->rt_rmx; 348 rtm->rtm_addrs = info.rti_addrs; 349 break; 350 351 case RTM_CHANGE: 352 /* 353 * new gateway could require new ifaddr, ifp; 354 * flags may also be different; ifp may be specified 355 * by ll sockaddr when protocol address is ambiguous 356 */ 357 if ((error = rt_getifa(&info)) != 0) 358 senderr(error); 359 if (gate && rt_setgate(rt, rt_key(rt), gate)) 360 senderr(EDQUOT); 361 /* new gateway could require new ifaddr, ifp; 362 flags may also be different; ifp may be specified 363 by ll sockaddr when protocol address is ambiguous */ 364 if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) && 365 (ifp = ifa->ifa_ifp) && (ifaaddr || gate)) 366 ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate, 367 ifp); 368 else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) || 369 (gate && (ifa = ifa_ifwithroute(rt->rt_flags, 370 rt_key(rt), gate)))) 371 ifp = ifa->ifa_ifp; 372 if (ifa) { 373 struct ifaddr *oifa = rt->rt_ifa; 374 if (oifa != ifa) { 375 if (oifa && oifa->ifa_rtrequest) 376 oifa->ifa_rtrequest(RTM_DELETE, rt, 377 &info); 378 IFAFREE(rt->rt_ifa); 379 rt->rt_ifa = ifa; 380 IFAREF(rt->rt_ifa); 381 rt->rt_ifp = ifp; 382 } 383 } 384 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 385 &rt->rt_rmx); 386 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 387 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info); 388 if (genmask) 389 rt->rt_genmask = genmask; 390 /* 391 * Fall into 392 */ 393 case RTM_LOCK: 394 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 395 rt->rt_rmx.rmx_locks |= 396 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 397 break; 398 } 399 break; 400 401 default: 402 senderr(EOPNOTSUPP); 403 } 404 405 flush: 406 if (rtm) { 407 if (error) 408 rtm->rtm_errno = error; 409 else 410 rtm->rtm_flags |= RTF_DONE; 411 } 412 if (rt) 413 rtfree(rt); 414 { 415 struct rawcb *rp = 0; 416 /* 417 * Check to see if we don't want our own messages. 418 */ 419 if ((so->so_options & SO_USELOOPBACK) == 0) { 420 if (route_cb.any_count <= 1) { 421 if (rtm) 422 Free(rtm); 423 m_freem(m); 424 return (error); 425 } 426 /* There is another listener, so construct message */ 427 rp = sotorawcb(so); 428 } 429 if (rtm) { 430 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 431 if (m->m_pkthdr.len < rtm->rtm_msglen) { 432 m_freem(m); 433 m = NULL; 434 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 435 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 436 Free(rtm); 437 } 438 if (rp) 439 rp->rcb_proto.sp_family = 0; /* Avoid us */ 440 if (dst) 441 route_proto.sp_protocol = dst->sa_family; 442 if (m) 443 raw_input(m, &route_proto, &route_src, &route_dst); 444 if (rp) 445 rp->rcb_proto.sp_family = PF_ROUTE; 446 } 447 return (error); 448 } 449 450 void 451 rt_setmetrics(which, in, out) 452 u_long which; 453 struct rt_metrics *in, *out; 454 { 455 #define metric(f, e) if (which & (f)) out->e = in->e; 456 metric(RTV_RPIPE, rmx_recvpipe); 457 metric(RTV_SPIPE, rmx_sendpipe); 458 metric(RTV_SSTHRESH, rmx_ssthresh); 459 metric(RTV_RTT, rmx_rtt); 460 metric(RTV_RTTVAR, rmx_rttvar); 461 metric(RTV_HOPCOUNT, rmx_hopcount); 462 metric(RTV_MTU, rmx_mtu); 463 metric(RTV_EXPIRE, rmx_expire); 464 #undef metric 465 } 466 467 #define ROUNDUP(a) \ 468 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 469 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 470 471 static int 472 rt_xaddrs(cp, cplim, rtinfo) 473 caddr_t cp, cplim; 474 struct rt_addrinfo *rtinfo; 475 { 476 struct sockaddr *sa; 477 int i; 478 479 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 480 if ((rtinfo->rti_addrs & (1 << i)) == 0) 481 continue; 482 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 483 ADVANCE(cp, sa); 484 } 485 486 /* Check for extra addresses specified. */ 487 if ((rtinfo->rti_addrs & (~0 << i)) != 0) 488 return (1); 489 /* Check for bad data length. */ 490 if (cp != cplim) { 491 if (i == RTAX_NETMASK + 1 && 492 cp - ROUNDUP(sa->sa_len) + sa->sa_len == cplim) 493 /* 494 * The last sockaddr was netmask. 495 * We accept this for now for the sake of old 496 * binaries or third party softwares. 497 */ 498 ; 499 else 500 return (1); 501 } 502 return (0); 503 } 504 505 static struct mbuf * 506 rt_msg1(type, rtinfo, data, datalen) 507 int type; 508 struct rt_addrinfo *rtinfo; 509 caddr_t data; 510 int datalen; 511 { 512 struct rt_msghdr *rtm; 513 struct mbuf *m; 514 int i; 515 struct sockaddr *sa; 516 int len, dlen; 517 518 m = m_gethdr(M_DONTWAIT, MT_DATA); 519 if (m == 0) 520 return (m); 521 switch (type) { 522 523 case RTM_DELADDR: 524 case RTM_NEWADDR: 525 len = sizeof(struct ifa_msghdr); 526 break; 527 528 #ifdef COMPAT_14 529 case RTM_OIFINFO: 530 len = sizeof(struct if_msghdr14); 531 break; 532 #endif 533 534 case RTM_IFINFO: 535 len = sizeof(struct if_msghdr); 536 break; 537 538 case RTM_IFANNOUNCE: 539 len = sizeof(struct if_announcemsghdr); 540 break; 541 542 default: 543 len = sizeof(struct rt_msghdr); 544 } 545 if (len > MHLEN + MLEN) 546 panic("rt_msg1: message too long"); 547 else if (len > MHLEN) { 548 m->m_next = m_get(M_DONTWAIT, MT_DATA); 549 if (m->m_next == NULL) { 550 m_freem(m); 551 return (NULL); 552 } 553 m->m_pkthdr.len = len; 554 m->m_len = MHLEN; 555 m->m_next->m_len = len - MHLEN; 556 } else { 557 m->m_pkthdr.len = m->m_len = len; 558 } 559 m->m_pkthdr.rcvif = 0; 560 m_copyback(m, 0, datalen, data); 561 rtm = mtod(m, struct rt_msghdr *); 562 for (i = 0; i < RTAX_MAX; i++) { 563 if ((sa = rtinfo->rti_info[i]) == NULL) 564 continue; 565 rtinfo->rti_addrs |= (1 << i); 566 dlen = ROUNDUP(sa->sa_len); 567 m_copyback(m, len, dlen, (caddr_t)sa); 568 len += dlen; 569 } 570 if (m->m_pkthdr.len != len) { 571 m_freem(m); 572 return (NULL); 573 } 574 rtm->rtm_msglen = len; 575 rtm->rtm_version = RTM_VERSION; 576 rtm->rtm_type = type; 577 return (m); 578 } 579 580 /* 581 * rt_msg2 582 * 583 * fills 'cp' or 'w'.w_tmem with the routing socket message and 584 * returns the length of the message in 'lenp'. 585 * 586 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 587 * the message 588 * otherwise walkarg's w_needed is updated and if the user buffer is 589 * specified and w_needed indicates space exists the information is copied 590 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 591 * if the allocation fails ENOBUFS is returned. 592 */ 593 static int 594 rt_msg2(type, rtinfo, cp, w, lenp) 595 int type; 596 struct rt_addrinfo *rtinfo; 597 caddr_t cp; 598 struct walkarg *w; 599 int *lenp; 600 { 601 int i; 602 int len, dlen, second_time = 0; 603 caddr_t cp0; 604 605 rtinfo->rti_addrs = 0; 606 again: 607 switch (type) { 608 609 case RTM_DELADDR: 610 case RTM_NEWADDR: 611 len = sizeof(struct ifa_msghdr); 612 break; 613 #ifdef COMPAT_14 614 case RTM_OIFINFO: 615 len = sizeof(struct if_msghdr14); 616 break; 617 #endif 618 619 case RTM_IFINFO: 620 len = sizeof(struct if_msghdr); 621 break; 622 623 default: 624 len = sizeof(struct rt_msghdr); 625 } 626 if ((cp0 = cp) != NULL) 627 cp += len; 628 for (i = 0; i < RTAX_MAX; i++) { 629 struct sockaddr *sa; 630 631 if ((sa = rtinfo->rti_info[i]) == 0) 632 continue; 633 rtinfo->rti_addrs |= (1 << i); 634 dlen = ROUNDUP(sa->sa_len); 635 if (cp) { 636 bcopy(sa, cp, (unsigned)dlen); 637 cp += dlen; 638 } 639 len += dlen; 640 } 641 if (cp == 0 && w != NULL && !second_time) { 642 struct walkarg *rw = w; 643 644 rw->w_needed += len; 645 if (rw->w_needed <= 0 && rw->w_where) { 646 if (rw->w_tmemsize < len) { 647 if (rw->w_tmem) 648 free(rw->w_tmem, M_RTABLE); 649 rw->w_tmem = (caddr_t) malloc(len, M_RTABLE, 650 M_NOWAIT); 651 if (rw->w_tmem) 652 rw->w_tmemsize = len; 653 } 654 if (rw->w_tmem) { 655 cp = rw->w_tmem; 656 second_time = 1; 657 goto again; 658 } else { 659 rw->w_tmemneeded = len; 660 return (ENOBUFS); 661 } 662 } 663 } 664 if (cp) { 665 struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 666 667 rtm->rtm_version = RTM_VERSION; 668 rtm->rtm_type = type; 669 rtm->rtm_msglen = len; 670 } 671 if (lenp) 672 *lenp = len; 673 return (0); 674 } 675 676 /* 677 * This routine is called to generate a message from the routing 678 * socket indicating that a redirect has occured, a routing lookup 679 * has failed, or that a protocol has detected timeouts to a particular 680 * destination. 681 */ 682 void 683 rt_missmsg(type, rtinfo, flags, error) 684 int type, flags, error; 685 struct rt_addrinfo *rtinfo; 686 { 687 struct rt_msghdr rtm; 688 struct mbuf *m; 689 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 690 691 if (route_cb.any_count == 0) 692 return; 693 memset(&rtm, 0, sizeof(rtm)); 694 rtm.rtm_flags = RTF_DONE | flags; 695 rtm.rtm_errno = error; 696 m = rt_msg1(type, rtinfo, (caddr_t)&rtm, sizeof(rtm)); 697 if (m == 0) 698 return; 699 mtod(m, struct rt_msghdr *)->rtm_addrs = rtinfo->rti_addrs; 700 route_proto.sp_protocol = sa ? sa->sa_family : 0; 701 raw_input(m, &route_proto, &route_src, &route_dst); 702 } 703 704 /* 705 * This routine is called to generate a message from the routing 706 * socket indicating that the status of a network interface has changed. 707 */ 708 void 709 rt_ifmsg(ifp) 710 struct ifnet *ifp; 711 { 712 struct if_msghdr ifm; 713 #ifdef COMPAT_14 714 struct if_msghdr14 oifm; 715 #endif 716 struct mbuf *m; 717 struct rt_addrinfo info; 718 719 if (route_cb.any_count == 0) 720 return; 721 memset(&info, 0, sizeof(info)); 722 memset(&ifm, 0, sizeof(ifm)); 723 ifm.ifm_index = ifp->if_index; 724 ifm.ifm_flags = ifp->if_flags; 725 ifm.ifm_data = ifp->if_data; 726 ifm.ifm_addrs = 0; 727 m = rt_msg1(RTM_IFINFO, &info, (caddr_t)&ifm, sizeof(ifm)); 728 if (m == 0) 729 return; 730 route_proto.sp_protocol = 0; 731 raw_input(m, &route_proto, &route_src, &route_dst); 732 #ifdef COMPAT_14 733 memset(&info, 0, sizeof(info)); 734 memset(&oifm, 0, sizeof(oifm)); 735 oifm.ifm_index = ifp->if_index; 736 oifm.ifm_flags = ifp->if_flags; 737 oifm.ifm_data.ifi_type = ifp->if_data.ifi_type; 738 oifm.ifm_data.ifi_addrlen = ifp->if_data.ifi_addrlen; 739 oifm.ifm_data.ifi_hdrlen = ifp->if_data.ifi_hdrlen; 740 oifm.ifm_data.ifi_mtu = ifp->if_data.ifi_mtu; 741 oifm.ifm_data.ifi_metric = ifp->if_data.ifi_metric; 742 oifm.ifm_data.ifi_baudrate = ifp->if_data.ifi_baudrate; 743 oifm.ifm_data.ifi_ipackets = ifp->if_data.ifi_ipackets; 744 oifm.ifm_data.ifi_ierrors = ifp->if_data.ifi_ierrors; 745 oifm.ifm_data.ifi_opackets = ifp->if_data.ifi_opackets; 746 oifm.ifm_data.ifi_oerrors = ifp->if_data.ifi_oerrors; 747 oifm.ifm_data.ifi_collisions = ifp->if_data.ifi_collisions; 748 oifm.ifm_data.ifi_ibytes = ifp->if_data.ifi_ibytes; 749 oifm.ifm_data.ifi_obytes = ifp->if_data.ifi_obytes; 750 oifm.ifm_data.ifi_imcasts = ifp->if_data.ifi_imcasts; 751 oifm.ifm_data.ifi_omcasts = ifp->if_data.ifi_omcasts; 752 oifm.ifm_data.ifi_iqdrops = ifp->if_data.ifi_iqdrops; 753 oifm.ifm_data.ifi_noproto = ifp->if_data.ifi_noproto; 754 oifm.ifm_data.ifi_lastchange = ifp->if_data.ifi_lastchange; 755 oifm.ifm_addrs = 0; 756 m = rt_msg1(RTM_OIFINFO, &info, (caddr_t)&oifm, sizeof(oifm)); 757 if (m == 0) 758 return; 759 route_proto.sp_protocol = 0; 760 raw_input(m, &route_proto, &route_src, &route_dst); 761 #endif 762 } 763 764 /* 765 * This is called to generate messages from the routing socket 766 * indicating a network interface has had addresses associated with it. 767 * if we ever reverse the logic and replace messages TO the routing 768 * socket indicate a request to configure interfaces, then it will 769 * be unnecessary as the routing socket will automatically generate 770 * copies of it. 771 */ 772 void 773 rt_newaddrmsg(cmd, ifa, error, rt) 774 int cmd, error; 775 struct ifaddr *ifa; 776 struct rtentry *rt; 777 { 778 struct rt_addrinfo info; 779 struct sockaddr *sa = NULL; 780 int pass; 781 struct mbuf *m = NULL; 782 struct ifnet *ifp = ifa->ifa_ifp; 783 784 if (route_cb.any_count == 0) 785 return; 786 for (pass = 1; pass < 3; pass++) { 787 memset(&info, 0, sizeof(info)); 788 if ((cmd == RTM_ADD && pass == 1) || 789 (cmd == RTM_DELETE && pass == 2)) { 790 struct ifa_msghdr ifam; 791 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 792 793 ifaaddr = sa = ifa->ifa_addr; 794 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 795 netmask = ifa->ifa_netmask; 796 brdaddr = ifa->ifa_dstaddr; 797 memset(&ifam, 0, sizeof(ifam)); 798 ifam.ifam_index = ifp->if_index; 799 ifam.ifam_metric = ifa->ifa_metric; 800 ifam.ifam_flags = ifa->ifa_flags; 801 m = rt_msg1(ncmd, &info, (caddr_t)&ifam, sizeof(ifam)); 802 if (m == NULL) 803 continue; 804 mtod(m, struct ifa_msghdr *)->ifam_addrs = 805 info.rti_addrs; 806 } 807 if ((cmd == RTM_ADD && pass == 2) || 808 (cmd == RTM_DELETE && pass == 1)) { 809 struct rt_msghdr rtm; 810 811 if (rt == 0) 812 continue; 813 netmask = rt_mask(rt); 814 dst = sa = rt_key(rt); 815 gate = rt->rt_gateway; 816 memset(&rtm, 0, sizeof(rtm)); 817 rtm.rtm_index = ifp->if_index; 818 rtm.rtm_flags |= rt->rt_flags; 819 rtm.rtm_errno = error; 820 m = rt_msg1(cmd, &info, (caddr_t)&rtm, sizeof(rtm)); 821 if (m == NULL) 822 continue; 823 mtod(m, struct rt_msghdr *)->rtm_addrs = info.rti_addrs; 824 } 825 route_proto.sp_protocol = sa ? sa->sa_family : 0; 826 raw_input(m, &route_proto, &route_src, &route_dst); 827 } 828 } 829 830 /* 831 * This is called to generate routing socket messages indicating 832 * network interface arrival and departure. 833 */ 834 void 835 rt_ifannouncemsg(ifp, what) 836 struct ifnet *ifp; 837 int what; 838 { 839 struct if_announcemsghdr ifan; 840 struct mbuf *m; 841 struct rt_addrinfo info; 842 843 if (route_cb.any_count == 0) 844 return; 845 memset(&info, 0, sizeof(info)); 846 memset(&ifan, 0, sizeof(ifan)); 847 ifan.ifan_index = ifp->if_index; 848 strcpy(ifan.ifan_name, ifp->if_xname); 849 ifan.ifan_what = what; 850 m = rt_msg1(RTM_IFANNOUNCE, &info, (caddr_t)&ifan, sizeof(ifan)); 851 if (m == 0) 852 return; 853 route_proto.sp_protocol = 0; 854 raw_input(m, &route_proto, &route_src, &route_dst); 855 } 856 857 /* 858 * This is used in dumping the kernel table via sysctl(). 859 */ 860 static int 861 sysctl_dumpentry(rn, v) 862 struct radix_node *rn; 863 void *v; 864 { 865 struct walkarg *w = v; 866 struct rtentry *rt = (struct rtentry *)rn; 867 int error = 0, size; 868 struct rt_addrinfo info; 869 870 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 871 return 0; 872 memset(&info, 0, sizeof(info)); 873 dst = rt_key(rt); 874 gate = rt->rt_gateway; 875 netmask = rt_mask(rt); 876 genmask = rt->rt_genmask; 877 if (rt->rt_ifp) { 878 ifpaddr = rt->rt_ifp->if_addrlist.tqh_first->ifa_addr; 879 ifaaddr = rt->rt_ifa->ifa_addr; 880 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 881 brdaddr = rt->rt_ifa->ifa_dstaddr; 882 } 883 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 884 return (error); 885 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 886 struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 887 888 rtm->rtm_flags = rt->rt_flags; 889 rtm->rtm_use = rt->rt_use; 890 rtm->rtm_rmx = rt->rt_rmx; 891 rtm->rtm_index = rt->rt_ifp->if_index; 892 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 893 rtm->rtm_addrs = info.rti_addrs; 894 if ((error = copyout(rtm, w->w_where, size)) != 0) 895 w->w_where = NULL; 896 else 897 w->w_where += size; 898 } 899 return (error); 900 } 901 902 static int 903 sysctl_iflist(af, w, type) 904 int af; 905 struct walkarg *w; 906 int type; 907 { 908 struct ifnet *ifp; 909 struct ifaddr *ifa; 910 struct rt_addrinfo info; 911 int len, error = 0; 912 913 memset(&info, 0, sizeof(info)); 914 for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) { 915 if (w->w_arg && w->w_arg != ifp->if_index) 916 continue; 917 ifa = ifp->if_addrlist.tqh_first; 918 ifpaddr = ifa->ifa_addr; 919 switch(type) { 920 case NET_RT_IFLIST: 921 error = 922 rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w, &len); 923 break; 924 #ifdef COMPAT_14 925 case NET_RT_OIFLIST: 926 error = 927 rt_msg2(RTM_OIFINFO, &info, (caddr_t)0, w, &len); 928 break; 929 #endif 930 default: 931 panic("sysctl_iflist(1)"); 932 } 933 if (error) 934 return (error); 935 ifpaddr = 0; 936 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 937 switch(type) { 938 case NET_RT_IFLIST: { 939 struct if_msghdr *ifm; 940 941 ifm = (struct if_msghdr *)w->w_tmem; 942 ifm->ifm_index = ifp->if_index; 943 ifm->ifm_flags = ifp->if_flags; 944 ifm->ifm_data = ifp->if_data; 945 ifm->ifm_addrs = info.rti_addrs; 946 error = copyout(ifm, w->w_where, len); 947 if (error) 948 return (error); 949 w->w_where += len; 950 break; 951 } 952 953 #ifdef COMPAT_14 954 case NET_RT_OIFLIST: { 955 struct if_msghdr14 *ifm; 956 957 ifm = (struct if_msghdr14 *)w->w_tmem; 958 ifm->ifm_index = ifp->if_index; 959 ifm->ifm_flags = ifp->if_flags; 960 ifm->ifm_data.ifi_type = ifp->if_data.ifi_type; 961 ifm->ifm_data.ifi_addrlen = 962 ifp->if_data.ifi_addrlen; 963 ifm->ifm_data.ifi_hdrlen = 964 ifp->if_data.ifi_hdrlen; 965 ifm->ifm_data.ifi_mtu = ifp->if_data.ifi_mtu; 966 ifm->ifm_data.ifi_metric = 967 ifp->if_data.ifi_metric; 968 ifm->ifm_data.ifi_baudrate = 969 ifp->if_data.ifi_baudrate; 970 ifm->ifm_data.ifi_ipackets = 971 ifp->if_data.ifi_ipackets; 972 ifm->ifm_data.ifi_ierrors = 973 ifp->if_data.ifi_ierrors; 974 ifm->ifm_data.ifi_opackets = 975 ifp->if_data.ifi_opackets; 976 ifm->ifm_data.ifi_oerrors = 977 ifp->if_data.ifi_oerrors; 978 ifm->ifm_data.ifi_collisions = 979 ifp->if_data.ifi_collisions; 980 ifm->ifm_data.ifi_ibytes = 981 ifp->if_data.ifi_ibytes; 982 ifm->ifm_data.ifi_obytes = 983 ifp->if_data.ifi_obytes; 984 ifm->ifm_data.ifi_imcasts = 985 ifp->if_data.ifi_imcasts; 986 ifm->ifm_data.ifi_omcasts = 987 ifp->if_data.ifi_omcasts; 988 ifm->ifm_data.ifi_iqdrops = 989 ifp->if_data.ifi_iqdrops; 990 ifm->ifm_data.ifi_noproto = 991 ifp->if_data.ifi_noproto; 992 ifm->ifm_data.ifi_lastchange = 993 ifp->if_data.ifi_lastchange; 994 ifm->ifm_addrs = info.rti_addrs; 995 error = copyout(ifm, w->w_where, len); 996 if (error) 997 return (error); 998 w->w_where += len; 999 break; 1000 } 1001 #endif 1002 default: 1003 panic("sysctl_iflist(2)"); 1004 } 1005 } 1006 while ((ifa = ifa->ifa_list.tqe_next) != NULL) { 1007 if (af && af != ifa->ifa_addr->sa_family) 1008 continue; 1009 ifaaddr = ifa->ifa_addr; 1010 netmask = ifa->ifa_netmask; 1011 brdaddr = ifa->ifa_dstaddr; 1012 if ((error = rt_msg2(RTM_NEWADDR, &info, 0, w, &len))) 1013 return (error); 1014 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1015 struct ifa_msghdr *ifam; 1016 1017 ifam = (struct ifa_msghdr *)w->w_tmem; 1018 ifam->ifam_index = ifa->ifa_ifp->if_index; 1019 ifam->ifam_flags = ifa->ifa_flags; 1020 ifam->ifam_metric = ifa->ifa_metric; 1021 ifam->ifam_addrs = info.rti_addrs; 1022 error = copyout(w->w_tmem, w->w_where, len); 1023 if (error) 1024 return (error); 1025 w->w_where += len; 1026 } 1027 } 1028 ifaaddr = netmask = brdaddr = 0; 1029 } 1030 return (0); 1031 } 1032 1033 static int 1034 sysctl_rtable(name, namelen, where, given, new, newlen) 1035 int *name; 1036 u_int namelen; 1037 void *where; 1038 size_t *given; 1039 void *new; 1040 size_t newlen; 1041 { 1042 struct radix_node_head *rnh; 1043 int i, s, error = EINVAL; 1044 u_char af; 1045 struct walkarg w; 1046 1047 if (new) 1048 return (EPERM); 1049 if (namelen != 3) 1050 return (EINVAL); 1051 af = name[0]; 1052 w.w_tmemneeded = 0; 1053 w.w_tmemsize = 0; 1054 w.w_tmem = NULL; 1055 again: 1056 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 1057 if (w.w_tmemneeded) { 1058 w.w_tmem = (caddr_t) malloc(w.w_tmemneeded, M_RTABLE, M_WAITOK); 1059 w.w_tmemsize = w.w_tmemneeded; 1060 w.w_tmemneeded = 0; 1061 } 1062 w.w_op = name[1]; 1063 w.w_arg = name[2]; 1064 w.w_given = *given; 1065 w.w_needed = 0 - w.w_given; 1066 w.w_where = where; 1067 1068 s = splsoftnet(); 1069 switch (w.w_op) { 1070 1071 case NET_RT_DUMP: 1072 case NET_RT_FLAGS: 1073 for (i = 1; i <= AF_MAX; i++) 1074 if ((rnh = rt_tables[i]) && (af == 0 || af == i) && 1075 (error = (*rnh->rnh_walktree)(rnh, 1076 sysctl_dumpentry, &w))) 1077 break; 1078 break; 1079 1080 #ifdef COMPAT_14 1081 case NET_RT_OIFLIST: 1082 error = sysctl_iflist(af, &w, w.w_op); 1083 break; 1084 #endif 1085 1086 case NET_RT_IFLIST: 1087 error = sysctl_iflist(af, &w, w.w_op); 1088 } 1089 splx(s); 1090 1091 /* check to see if we couldn't allocate memory with NOWAIT */ 1092 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 1093 goto again; 1094 1095 if (w.w_tmem) 1096 free(w.w_tmem, M_RTABLE); 1097 w.w_needed += w.w_given; 1098 if (where) { 1099 *given = w.w_where - (caddr_t) where; 1100 if (*given < w.w_needed) 1101 return (ENOMEM); 1102 } else { 1103 *given = (11 * w.w_needed) / 10; 1104 } 1105 return (error); 1106 } 1107 1108 /* 1109 * Definitions of protocols supported in the ROUTE domain. 1110 */ 1111 1112 extern struct domain routedomain; /* or at least forward */ 1113 1114 struct protosw routesw[] = { 1115 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 1116 raw_input, route_output, raw_ctlinput, 0, 1117 route_usrreq, 1118 raw_init, 0, 0, 0, 1119 sysctl_rtable, 1120 } 1121 }; 1122 1123 struct domain routedomain = 1124 { PF_ROUTE, "route", route_init, 0, 0, 1125 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 1126
Indexes created Fri Oct 03 02:09:57 GMT 2025