rtsock.c revision 1.45.2.1
1 /* $NetBSD: rtsock.c,v 1.45.2.1 2001/03/05 22:49:55 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 bzero(so->so_pcb, 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 bzero(&info, 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 && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0) 262 genmask = (struct sockaddr *)(t->rn_key); 263 else 264 senderr(ENOBUFS); 265 } 266 267 /* 268 * Verify that the caller has the appropriate privilege; RTM_GET 269 * is the only operation the non-superuser is allowed. 270 */ 271 if (rtm->rtm_type != RTM_GET && 272 suser(curproc->l_proc->p_ucred, &curproc->l_proc->p_acflag) != 0) 273 senderr(EACCES); 274 275 switch (rtm->rtm_type) { 276 277 case RTM_ADD: 278 if (gate == 0) 279 senderr(EINVAL); 280 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 281 if (error == 0 && saved_nrt) { 282 rt_setmetrics(rtm->rtm_inits, 283 &rtm->rtm_rmx, &saved_nrt->rt_rmx); 284 saved_nrt->rt_refcnt--; 285 saved_nrt->rt_genmask = genmask; 286 } 287 break; 288 289 case RTM_DELETE: 290 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 291 if (error == 0) { 292 (rt = saved_nrt)->rt_refcnt++; 293 goto report; 294 } 295 break; 296 297 case RTM_GET: 298 case RTM_CHANGE: 299 case RTM_LOCK: 300 if ((rnh = rt_tables[dst->sa_family]) == 0) { 301 senderr(EAFNOSUPPORT); 302 } 303 rn = rnh->rnh_lookup(dst, netmask, rnh); 304 if (rn == NULL || (rn->rn_flags & RNF_ROOT) != 0) { 305 senderr(ESRCH); 306 } 307 rt = (struct rtentry *)rn; 308 rt->rt_refcnt++; 309 310 switch(rtm->rtm_type) { 311 312 case RTM_GET: 313 report: 314 dst = rt_key(rt); 315 gate = rt->rt_gateway; 316 netmask = rt_mask(rt); 317 genmask = rt->rt_genmask; 318 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 319 if ((ifp = rt->rt_ifp) != NULL) { 320 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 321 ifaaddr = rt->rt_ifa->ifa_addr; 322 if (ifp->if_flags & IFF_POINTOPOINT) 323 brdaddr = rt->rt_ifa->ifa_dstaddr; 324 else 325 brdaddr = 0; 326 rtm->rtm_index = ifp->if_index; 327 } else { 328 ifpaddr = 0; 329 ifaaddr = 0; 330 } 331 } 332 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)0, 333 (struct walkarg *)0, &len); 334 if (len > rtm->rtm_msglen) { 335 struct rt_msghdr *new_rtm; 336 R_Malloc(new_rtm, struct rt_msghdr *, len); 337 if (new_rtm == 0) 338 senderr(ENOBUFS); 339 Bcopy(rtm, new_rtm, rtm->rtm_msglen); 340 Free(rtm); rtm = new_rtm; 341 } 342 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, 343 (struct walkarg *)0, 0); 344 rtm->rtm_flags = rt->rt_flags; 345 rtm->rtm_rmx = rt->rt_rmx; 346 rtm->rtm_addrs = info.rti_addrs; 347 break; 348 349 case RTM_CHANGE: 350 /* 351 * new gateway could require new ifaddr, ifp; 352 * flags may also be different; ifp may be specified 353 * by ll sockaddr when protocol address is ambiguous 354 */ 355 if ((error = rt_getifa(&info)) != 0) 356 senderr(error); 357 if (gate && rt_setgate(rt, rt_key(rt), gate)) 358 senderr(EDQUOT); 359 /* new gateway could require new ifaddr, ifp; 360 flags may also be different; ifp may be specified 361 by ll sockaddr when protocol address is ambiguous */ 362 if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) && 363 (ifp = ifa->ifa_ifp) && (ifaaddr || gate)) 364 ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate, 365 ifp); 366 else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) || 367 (gate && (ifa = ifa_ifwithroute(rt->rt_flags, 368 rt_key(rt), gate)))) 369 ifp = ifa->ifa_ifp; 370 if (ifa) { 371 struct ifaddr *oifa = rt->rt_ifa; 372 if (oifa != ifa) { 373 if (oifa && oifa->ifa_rtrequest) 374 oifa->ifa_rtrequest(RTM_DELETE, rt, 375 &info); 376 IFAFREE(rt->rt_ifa); 377 rt->rt_ifa = ifa; 378 IFAREF(rt->rt_ifa); 379 rt->rt_ifp = ifp; 380 } 381 } 382 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 383 &rt->rt_rmx); 384 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 385 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info); 386 if (genmask) 387 rt->rt_genmask = genmask; 388 /* 389 * Fall into 390 */ 391 case RTM_LOCK: 392 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 393 rt->rt_rmx.rmx_locks |= 394 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 395 break; 396 } 397 break; 398 399 default: 400 senderr(EOPNOTSUPP); 401 } 402 403 flush: 404 if (rtm) { 405 if (error) 406 rtm->rtm_errno = error; 407 else 408 rtm->rtm_flags |= RTF_DONE; 409 } 410 if (rt) 411 rtfree(rt); 412 { 413 struct rawcb *rp = 0; 414 /* 415 * Check to see if we don't want our own messages. 416 */ 417 if ((so->so_options & SO_USELOOPBACK) == 0) { 418 if (route_cb.any_count <= 1) { 419 if (rtm) 420 Free(rtm); 421 m_freem(m); 422 return (error); 423 } 424 /* There is another listener, so construct message */ 425 rp = sotorawcb(so); 426 } 427 if (rtm) { 428 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 429 Free(rtm); 430 } 431 if (rp) 432 rp->rcb_proto.sp_family = 0; /* Avoid us */ 433 if (dst) 434 route_proto.sp_protocol = dst->sa_family; 435 raw_input(m, &route_proto, &route_src, &route_dst); 436 if (rp) 437 rp->rcb_proto.sp_family = PF_ROUTE; 438 } 439 return (error); 440 } 441 442 void 443 rt_setmetrics(which, in, out) 444 u_long which; 445 struct rt_metrics *in, *out; 446 { 447 #define metric(f, e) if (which & (f)) out->e = in->e; 448 metric(RTV_RPIPE, rmx_recvpipe); 449 metric(RTV_SPIPE, rmx_sendpipe); 450 metric(RTV_SSTHRESH, rmx_ssthresh); 451 metric(RTV_RTT, rmx_rtt); 452 metric(RTV_RTTVAR, rmx_rttvar); 453 metric(RTV_HOPCOUNT, rmx_hopcount); 454 metric(RTV_MTU, rmx_mtu); 455 metric(RTV_EXPIRE, rmx_expire); 456 #undef metric 457 } 458 459 #define ROUNDUP(a) \ 460 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 461 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 462 463 static int 464 rt_xaddrs(cp, cplim, rtinfo) 465 caddr_t cp, cplim; 466 struct rt_addrinfo *rtinfo; 467 { 468 struct sockaddr *sa; 469 int i; 470 471 bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info)); 472 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 473 if ((rtinfo->rti_addrs & (1 << i)) == 0) 474 continue; 475 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 476 ADVANCE(cp, sa); 477 } 478 479 /* Check for extra addresses specified. */ 480 if ((rtinfo->rti_addrs & (~0 << i)) != 0) 481 return (1); 482 /* Check for bad data length. */ 483 if (cp != cplim) { 484 if (i == RTAX_NETMASK + 1 && 485 cp - ROUNDUP(sa->sa_len) + sa->sa_len == cplim) 486 /* 487 * The last sockaddr was netmask. 488 * We accept this for now for the sake of old 489 * binaries or third party softwares. 490 */ 491 ; 492 else 493 return (1); 494 } 495 return (0); 496 } 497 498 static struct mbuf * 499 rt_msg1(type, rtinfo, data, datalen) 500 int type; 501 struct rt_addrinfo *rtinfo; 502 caddr_t data; 503 int datalen; 504 { 505 struct rt_msghdr *rtm; 506 struct mbuf *m; 507 int i; 508 struct sockaddr *sa; 509 int len, dlen; 510 511 m = m_gethdr(M_DONTWAIT, MT_DATA); 512 if (m == 0) 513 return (m); 514 switch (type) { 515 516 case RTM_DELADDR: 517 case RTM_NEWADDR: 518 len = sizeof(struct ifa_msghdr); 519 break; 520 521 #ifdef COMPAT_14 522 case RTM_OIFINFO: 523 len = sizeof(struct if_msghdr14); 524 break; 525 #endif 526 527 case RTM_IFINFO: 528 len = sizeof(struct if_msghdr); 529 break; 530 531 case RTM_IFANNOUNCE: 532 len = sizeof(struct if_announcemsghdr); 533 break; 534 535 default: 536 len = sizeof(struct rt_msghdr); 537 } 538 if (len > MHLEN + MLEN) 539 panic("rt_msg1: message too long"); 540 else if (len > MHLEN) { 541 m->m_next = m_get(M_DONTWAIT, MT_DATA); 542 if (m->m_next == NULL) { 543 m_freem(m); 544 return (NULL); 545 } 546 m->m_pkthdr.len = len; 547 m->m_len = MHLEN; 548 m->m_next->m_len = len - MHLEN; 549 } else { 550 m->m_pkthdr.len = m->m_len = len; 551 } 552 m->m_pkthdr.rcvif = 0; 553 m_copyback(m, 0, datalen, data); 554 rtm = mtod(m, struct rt_msghdr *); 555 for (i = 0; i < RTAX_MAX; i++) { 556 if ((sa = rtinfo->rti_info[i]) == NULL) 557 continue; 558 rtinfo->rti_addrs |= (1 << i); 559 dlen = ROUNDUP(sa->sa_len); 560 m_copyback(m, len, dlen, (caddr_t)sa); 561 len += dlen; 562 } 563 rtm->rtm_msglen = len; 564 rtm->rtm_version = RTM_VERSION; 565 rtm->rtm_type = type; 566 return (m); 567 } 568 569 /* 570 * rt_msg2 571 * 572 * fills 'cp' or 'w'.w_tmem with the routing socket message and 573 * returns the length of the message in 'lenp'. 574 * 575 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 576 * the message 577 * otherwise walkarg's w_needed is updated and if the user buffer is 578 * specified and w_needed indicates space exists the information is copied 579 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 580 * if the allocation fails ENOBUFS is returned. 581 */ 582 static int 583 rt_msg2(type, rtinfo, cp, w, lenp) 584 int type; 585 struct rt_addrinfo *rtinfo; 586 caddr_t cp; 587 struct walkarg *w; 588 int *lenp; 589 { 590 int i; 591 int len, dlen, second_time = 0; 592 caddr_t cp0; 593 594 rtinfo->rti_addrs = 0; 595 again: 596 switch (type) { 597 598 case RTM_DELADDR: 599 case RTM_NEWADDR: 600 len = sizeof(struct ifa_msghdr); 601 break; 602 #ifdef COMPAT_14 603 case RTM_OIFINFO: 604 len = sizeof(struct if_msghdr14); 605 break; 606 #endif 607 608 case RTM_IFINFO: 609 len = sizeof(struct if_msghdr); 610 break; 611 612 default: 613 len = sizeof(struct rt_msghdr); 614 } 615 if ((cp0 = cp) != NULL) 616 cp += len; 617 for (i = 0; i < RTAX_MAX; i++) { 618 struct sockaddr *sa; 619 620 if ((sa = rtinfo->rti_info[i]) == 0) 621 continue; 622 rtinfo->rti_addrs |= (1 << i); 623 dlen = ROUNDUP(sa->sa_len); 624 if (cp) { 625 bcopy(sa, cp, (unsigned)dlen); 626 cp += dlen; 627 } 628 len += dlen; 629 } 630 if (cp == 0 && w != NULL && !second_time) { 631 struct walkarg *rw = w; 632 633 rw->w_needed += len; 634 if (rw->w_needed <= 0 && rw->w_where) { 635 if (rw->w_tmemsize < len) { 636 if (rw->w_tmem) 637 free(rw->w_tmem, M_RTABLE); 638 rw->w_tmem = (caddr_t) malloc(len, M_RTABLE, 639 M_NOWAIT); 640 if (rw->w_tmem) 641 rw->w_tmemsize = len; 642 } 643 if (rw->w_tmem) { 644 cp = rw->w_tmem; 645 second_time = 1; 646 goto again; 647 } else { 648 rw->w_tmemneeded = len; 649 return (ENOBUFS); 650 } 651 } 652 } 653 if (cp) { 654 struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 655 656 rtm->rtm_version = RTM_VERSION; 657 rtm->rtm_type = type; 658 rtm->rtm_msglen = len; 659 } 660 if (lenp) 661 *lenp = len; 662 return (0); 663 } 664 665 /* 666 * This routine is called to generate a message from the routing 667 * socket indicating that a redirect has occured, a routing lookup 668 * has failed, or that a protocol has detected timeouts to a particular 669 * destination. 670 */ 671 void 672 rt_missmsg(type, rtinfo, flags, error) 673 int type, flags, error; 674 struct rt_addrinfo *rtinfo; 675 { 676 struct rt_msghdr rtm; 677 struct mbuf *m; 678 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 679 680 if (route_cb.any_count == 0) 681 return; 682 bzero(&rtm, sizeof(rtm)); 683 rtm.rtm_flags = RTF_DONE | flags; 684 rtm.rtm_errno = error; 685 m = rt_msg1(type, rtinfo, (caddr_t)&rtm, sizeof(rtm)); 686 if (m == 0) 687 return; 688 mtod(m, struct rt_msghdr *)->rtm_addrs = rtinfo->rti_addrs; 689 route_proto.sp_protocol = sa ? sa->sa_family : 0; 690 raw_input(m, &route_proto, &route_src, &route_dst); 691 } 692 693 /* 694 * This routine is called to generate a message from the routing 695 * socket indicating that the status of a network interface has changed. 696 */ 697 void 698 rt_ifmsg(ifp) 699 struct ifnet *ifp; 700 { 701 struct if_msghdr ifm; 702 #ifdef COMPAT_14 703 struct if_msghdr14 oifm; 704 #endif 705 struct mbuf *m; 706 struct rt_addrinfo info; 707 708 if (route_cb.any_count == 0) 709 return; 710 bzero(&info, sizeof(info)); 711 bzero(&ifm, sizeof(ifm)); 712 ifm.ifm_index = ifp->if_index; 713 ifm.ifm_flags = ifp->if_flags; 714 ifm.ifm_data = ifp->if_data; 715 ifm.ifm_addrs = 0; 716 m = rt_msg1(RTM_IFINFO, &info, (caddr_t)&ifm, sizeof(ifm)); 717 if (m == 0) 718 return; 719 route_proto.sp_protocol = 0; 720 raw_input(m, &route_proto, &route_src, &route_dst); 721 #ifdef COMPAT_14 722 bzero(&info, sizeof(info)); 723 bzero(&oifm, sizeof(oifm)); 724 oifm.ifm_index = ifp->if_index; 725 oifm.ifm_flags = ifp->if_flags; 726 oifm.ifm_data.ifi_type = ifp->if_data.ifi_type; 727 oifm.ifm_data.ifi_addrlen = ifp->if_data.ifi_addrlen; 728 oifm.ifm_data.ifi_hdrlen = ifp->if_data.ifi_hdrlen; 729 oifm.ifm_data.ifi_mtu = ifp->if_data.ifi_mtu; 730 oifm.ifm_data.ifi_metric = ifp->if_data.ifi_metric; 731 oifm.ifm_data.ifi_baudrate = ifp->if_data.ifi_baudrate; 732 oifm.ifm_data.ifi_ipackets = ifp->if_data.ifi_ipackets; 733 oifm.ifm_data.ifi_ierrors = ifp->if_data.ifi_ierrors; 734 oifm.ifm_data.ifi_opackets = ifp->if_data.ifi_opackets; 735 oifm.ifm_data.ifi_oerrors = ifp->if_data.ifi_oerrors; 736 oifm.ifm_data.ifi_collisions = ifp->if_data.ifi_collisions; 737 oifm.ifm_data.ifi_ibytes = ifp->if_data.ifi_ibytes; 738 oifm.ifm_data.ifi_obytes = ifp->if_data.ifi_obytes; 739 oifm.ifm_data.ifi_imcasts = ifp->if_data.ifi_imcasts; 740 oifm.ifm_data.ifi_omcasts = ifp->if_data.ifi_omcasts; 741 oifm.ifm_data.ifi_iqdrops = ifp->if_data.ifi_iqdrops; 742 oifm.ifm_data.ifi_noproto = ifp->if_data.ifi_noproto; 743 oifm.ifm_data.ifi_lastchange = ifp->if_data.ifi_lastchange; 744 oifm.ifm_addrs = 0; 745 m = rt_msg1(RTM_OIFINFO, &info, (caddr_t)&oifm, sizeof(oifm)); 746 if (m == 0) 747 return; 748 route_proto.sp_protocol = 0; 749 raw_input(m, &route_proto, &route_src, &route_dst); 750 #endif 751 } 752 753 /* 754 * This is called to generate messages from the routing socket 755 * indicating a network interface has had addresses associated with it. 756 * if we ever reverse the logic and replace messages TO the routing 757 * socket indicate a request to configure interfaces, then it will 758 * be unnecessary as the routing socket will automatically generate 759 * copies of it. 760 */ 761 void 762 rt_newaddrmsg(cmd, ifa, error, rt) 763 int cmd, error; 764 struct ifaddr *ifa; 765 struct rtentry *rt; 766 { 767 struct rt_addrinfo info; 768 struct sockaddr *sa = NULL; 769 int pass; 770 struct mbuf *m = NULL; 771 struct ifnet *ifp = ifa->ifa_ifp; 772 773 if (route_cb.any_count == 0) 774 return; 775 for (pass = 1; pass < 3; pass++) { 776 bzero(&info, sizeof(info)); 777 if ((cmd == RTM_ADD && pass == 1) || 778 (cmd == RTM_DELETE && pass == 2)) { 779 struct ifa_msghdr ifam; 780 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 781 782 ifaaddr = sa = ifa->ifa_addr; 783 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 784 netmask = ifa->ifa_netmask; 785 brdaddr = ifa->ifa_dstaddr; 786 bzero(&ifam, sizeof(ifam)); 787 ifam.ifam_index = ifp->if_index; 788 ifam.ifam_metric = ifa->ifa_metric; 789 ifam.ifam_flags = ifa->ifa_flags; 790 m = rt_msg1(ncmd, &info, (caddr_t)&ifam, sizeof(ifam)); 791 if (m == NULL) 792 continue; 793 mtod(m, struct ifa_msghdr *)->ifam_addrs = 794 info.rti_addrs; 795 } 796 if ((cmd == RTM_ADD && pass == 2) || 797 (cmd == RTM_DELETE && pass == 1)) { 798 struct rt_msghdr rtm; 799 800 if (rt == 0) 801 continue; 802 netmask = rt_mask(rt); 803 dst = sa = rt_key(rt); 804 gate = rt->rt_gateway; 805 bzero(&rtm, sizeof(rtm)); 806 rtm.rtm_index = ifp->if_index; 807 rtm.rtm_flags |= rt->rt_flags; 808 rtm.rtm_errno = error; 809 m = rt_msg1(cmd, &info, (caddr_t)&rtm, sizeof(rtm)); 810 if (m == NULL) 811 continue; 812 mtod(m, struct rt_msghdr *)->rtm_addrs = info.rti_addrs; 813 } 814 route_proto.sp_protocol = sa ? sa->sa_family : 0; 815 raw_input(m, &route_proto, &route_src, &route_dst); 816 } 817 } 818 819 /* 820 * This is called to generate routing socket messages indicating 821 * network interface arrival and departure. 822 */ 823 void 824 rt_ifannouncemsg(ifp, what) 825 struct ifnet *ifp; 826 int what; 827 { 828 struct if_announcemsghdr ifan; 829 struct mbuf *m; 830 struct rt_addrinfo info; 831 832 if (route_cb.any_count == 0) 833 return; 834 bzero(&info, sizeof(info)); 835 bzero(&ifan, sizeof(ifan)); 836 ifan.ifan_index = ifp->if_index; 837 strcpy(ifan.ifan_name, ifp->if_xname); 838 ifan.ifan_what = what; 839 m = rt_msg1(RTM_IFANNOUNCE, &info, (caddr_t)&ifan, sizeof(ifan)); 840 if (m == 0) 841 return; 842 route_proto.sp_protocol = 0; 843 raw_input(m, &route_proto, &route_src, &route_dst); 844 } 845 846 /* 847 * This is used in dumping the kernel table via sysctl(). 848 */ 849 static int 850 sysctl_dumpentry(rn, v) 851 struct radix_node *rn; 852 void *v; 853 { 854 struct walkarg *w = v; 855 struct rtentry *rt = (struct rtentry *)rn; 856 int error = 0, size; 857 struct rt_addrinfo info; 858 859 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 860 return 0; 861 bzero(&info, sizeof(info)); 862 dst = rt_key(rt); 863 gate = rt->rt_gateway; 864 netmask = rt_mask(rt); 865 genmask = rt->rt_genmask; 866 if (rt->rt_ifp) { 867 ifpaddr = rt->rt_ifp->if_addrlist.tqh_first->ifa_addr; 868 ifaaddr = rt->rt_ifa->ifa_addr; 869 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 870 brdaddr = rt->rt_ifa->ifa_dstaddr; 871 } 872 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 873 return (error); 874 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 875 struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 876 877 rtm->rtm_flags = rt->rt_flags; 878 rtm->rtm_use = rt->rt_use; 879 rtm->rtm_rmx = rt->rt_rmx; 880 rtm->rtm_index = rt->rt_ifp->if_index; 881 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 882 rtm->rtm_addrs = info.rti_addrs; 883 if ((error = copyout(rtm, w->w_where, size)) != 0) 884 w->w_where = NULL; 885 else 886 w->w_where += size; 887 } 888 return (error); 889 } 890 891 static int 892 sysctl_iflist(af, w, type) 893 int af; 894 struct walkarg *w; 895 int type; 896 { 897 struct ifnet *ifp; 898 struct ifaddr *ifa; 899 struct rt_addrinfo info; 900 int len, error = 0; 901 902 bzero(&info, sizeof(info)); 903 for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) { 904 if (w->w_arg && w->w_arg != ifp->if_index) 905 continue; 906 ifa = ifp->if_addrlist.tqh_first; 907 ifpaddr = ifa->ifa_addr; 908 switch(type) { 909 case NET_RT_IFLIST: 910 error = 911 rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w, &len); 912 break; 913 #ifdef COMPAT_14 914 case NET_RT_OIFLIST: 915 error = 916 rt_msg2(RTM_OIFINFO, &info, (caddr_t)0, w, &len); 917 break; 918 #endif 919 default: 920 panic("sysctl_iflist(1)"); 921 } 922 if (error) 923 return (error); 924 ifpaddr = 0; 925 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 926 switch(type) { 927 case NET_RT_IFLIST: { 928 struct if_msghdr *ifm; 929 930 ifm = (struct if_msghdr *)w->w_tmem; 931 ifm->ifm_index = ifp->if_index; 932 ifm->ifm_flags = ifp->if_flags; 933 ifm->ifm_data = ifp->if_data; 934 ifm->ifm_addrs = info.rti_addrs; 935 error = copyout(ifm, w->w_where, len); 936 if (error) 937 return (error); 938 w->w_where += len; 939 break; 940 } 941 942 #ifdef COMPAT_14 943 case NET_RT_OIFLIST: { 944 struct if_msghdr14 *ifm; 945 946 ifm = (struct if_msghdr14 *)w->w_tmem; 947 ifm->ifm_index = ifp->if_index; 948 ifm->ifm_flags = ifp->if_flags; 949 ifm->ifm_data.ifi_type = ifp->if_data.ifi_type; 950 ifm->ifm_data.ifi_addrlen = 951 ifp->if_data.ifi_addrlen; 952 ifm->ifm_data.ifi_hdrlen = 953 ifp->if_data.ifi_hdrlen; 954 ifm->ifm_data.ifi_mtu = ifp->if_data.ifi_mtu; 955 ifm->ifm_data.ifi_metric = 956 ifp->if_data.ifi_metric; 957 ifm->ifm_data.ifi_baudrate = 958 ifp->if_data.ifi_baudrate; 959 ifm->ifm_data.ifi_ipackets = 960 ifp->if_data.ifi_ipackets; 961 ifm->ifm_data.ifi_ierrors = 962 ifp->if_data.ifi_ierrors; 963 ifm->ifm_data.ifi_opackets = 964 ifp->if_data.ifi_opackets; 965 ifm->ifm_data.ifi_oerrors = 966 ifp->if_data.ifi_oerrors; 967 ifm->ifm_data.ifi_collisions = 968 ifp->if_data.ifi_collisions; 969 ifm->ifm_data.ifi_ibytes = 970 ifp->if_data.ifi_ibytes; 971 ifm->ifm_data.ifi_obytes = 972 ifp->if_data.ifi_obytes; 973 ifm->ifm_data.ifi_imcasts = 974 ifp->if_data.ifi_imcasts; 975 ifm->ifm_data.ifi_omcasts = 976 ifp->if_data.ifi_omcasts; 977 ifm->ifm_data.ifi_iqdrops = 978 ifp->if_data.ifi_iqdrops; 979 ifm->ifm_data.ifi_noproto = 980 ifp->if_data.ifi_noproto; 981 ifm->ifm_data.ifi_lastchange = 982 ifp->if_data.ifi_lastchange; 983 ifm->ifm_addrs = info.rti_addrs; 984 error = copyout(ifm, w->w_where, len); 985 if (error) 986 return (error); 987 w->w_where += len; 988 break; 989 } 990 #endif 991 default: 992 panic("sysctl_iflist(2)"); 993 } 994 } 995 while ((ifa = ifa->ifa_list.tqe_next) != NULL) { 996 if (af && af != ifa->ifa_addr->sa_family) 997 continue; 998 ifaaddr = ifa->ifa_addr; 999 netmask = ifa->ifa_netmask; 1000 brdaddr = ifa->ifa_dstaddr; 1001 if ((error = rt_msg2(RTM_NEWADDR, &info, 0, w, &len))) 1002 return (error); 1003 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1004 struct ifa_msghdr *ifam; 1005 1006 ifam = (struct ifa_msghdr *)w->w_tmem; 1007 ifam->ifam_index = ifa->ifa_ifp->if_index; 1008 ifam->ifam_flags = ifa->ifa_flags; 1009 ifam->ifam_metric = ifa->ifa_metric; 1010 ifam->ifam_addrs = info.rti_addrs; 1011 error = copyout(w->w_tmem, w->w_where, len); 1012 if (error) 1013 return (error); 1014 w->w_where += len; 1015 } 1016 } 1017 ifaaddr = netmask = brdaddr = 0; 1018 } 1019 return (0); 1020 } 1021 1022 static int 1023 sysctl_rtable(name, namelen, where, given, new, newlen) 1024 int *name; 1025 u_int namelen; 1026 void *where; 1027 size_t *given; 1028 void *new; 1029 size_t newlen; 1030 { 1031 struct radix_node_head *rnh; 1032 int i, s, error = EINVAL; 1033 u_char af; 1034 struct walkarg w; 1035 1036 if (new) 1037 return (EPERM); 1038 if (namelen != 3) 1039 return (EINVAL); 1040 af = name[0]; 1041 w.w_tmemneeded = 0; 1042 w.w_tmemsize = 0; 1043 w.w_tmem = NULL; 1044 again: 1045 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 1046 if (w.w_tmemneeded) { 1047 w.w_tmem = (caddr_t) malloc(w.w_tmemneeded, M_RTABLE, M_WAITOK); 1048 w.w_tmemsize = w.w_tmemneeded; 1049 w.w_tmemneeded = 0; 1050 } 1051 w.w_op = name[1]; 1052 w.w_arg = name[2]; 1053 w.w_given = *given; 1054 w.w_needed = 0 - w.w_given; 1055 w.w_where = where; 1056 1057 s = splsoftnet(); 1058 switch (w.w_op) { 1059 1060 case NET_RT_DUMP: 1061 case NET_RT_FLAGS: 1062 for (i = 1; i <= AF_MAX; i++) 1063 if ((rnh = rt_tables[i]) && (af == 0 || af == i) && 1064 (error = (*rnh->rnh_walktree)(rnh, 1065 sysctl_dumpentry, &w))) 1066 break; 1067 break; 1068 1069 #ifdef COMPAT_14 1070 case NET_RT_OIFLIST: 1071 error = sysctl_iflist(af, &w, w.w_op); 1072 break; 1073 #endif 1074 1075 case NET_RT_IFLIST: 1076 error = sysctl_iflist(af, &w, w.w_op); 1077 } 1078 splx(s); 1079 1080 /* check to see if we couldn't allocate memory with NOWAIT */ 1081 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 1082 goto again; 1083 1084 if (w.w_tmem) 1085 free(w.w_tmem, M_RTABLE); 1086 w.w_needed += w.w_given; 1087 if (where) { 1088 *given = w.w_where - (caddr_t) where; 1089 if (*given < w.w_needed) 1090 return (ENOMEM); 1091 } else { 1092 *given = (11 * w.w_needed) / 10; 1093 } 1094 return (error); 1095 } 1096 1097 /* 1098 * Definitions of protocols supported in the ROUTE domain. 1099 */ 1100 1101 extern struct domain routedomain; /* or at least forward */ 1102 1103 struct protosw routesw[] = { 1104 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 1105 raw_input, route_output, raw_ctlinput, 0, 1106 route_usrreq, 1107 raw_init, 0, 0, 0, 1108 sysctl_rtable, 1109 } 1110 }; 1111 1112 struct domain routedomain = 1113 { PF_ROUTE, "route", route_init, 0, 0, 1114 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 1115
Indexes created Fri Oct 03 02:09:57 GMT 2025