rtsock.c revision 1.49
1 /* $NetBSD: rtsock.c,v 1.49 2001/07/19 00:12:09 enami Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1988, 1991, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)rtsock.c 8.7 (Berkeley) 10/12/95 65 */ 66 67 #include "opt_inet.h" 68 69 #include <sys/param.h> 70 #include <sys/systm.h> 71 #include <sys/proc.h> 72 #include <sys/mbuf.h> 73 #include <sys/socket.h> 74 #include <sys/socketvar.h> 75 #include <sys/domain.h> 76 #include <sys/protosw.h> 77 78 #include <uvm/uvm_extern.h> 79 80 #include <sys/sysctl.h> 81 82 #include <net/if.h> 83 #include <net/route.h> 84 #include <net/raw_cb.h> 85 86 #include <machine/stdarg.h> 87 88 struct sockaddr route_dst = { 2, PF_ROUTE, }; 89 struct sockaddr route_src = { 2, PF_ROUTE, }; 90 struct sockproto route_proto = { PF_ROUTE, }; 91 92 struct walkarg { 93 int w_op; 94 int w_arg; 95 int w_given; 96 int w_needed; 97 caddr_t w_where; 98 int w_tmemsize; 99 int w_tmemneeded; 100 caddr_t w_tmem; 101 }; 102 103 static struct mbuf *rt_msg1 __P((int, struct rt_addrinfo *, caddr_t, int)); 104 static int rt_msg2 __P((int, struct rt_addrinfo *, caddr_t, struct walkarg *, 105 int *)); 106 static int rt_xaddrs __P((caddr_t, caddr_t, struct rt_addrinfo *)); 107 static int sysctl_dumpentry __P((struct radix_node *, void *)); 108 static int sysctl_iflist __P((int, struct walkarg *, int)); 109 static int sysctl_rtable __P((int *, u_int, void *, size_t *, void *, size_t)); 110 static __inline void rt_adjustcount __P((int, int)); 111 112 /* Sleazy use of local variables throughout file, warning!!!! */ 113 #define dst info.rti_info[RTAX_DST] 114 #define gate info.rti_info[RTAX_GATEWAY] 115 #define netmask info.rti_info[RTAX_NETMASK] 116 #define genmask info.rti_info[RTAX_GENMASK] 117 #define ifpaddr info.rti_info[RTAX_IFP] 118 #define ifaaddr info.rti_info[RTAX_IFA] 119 #define brdaddr info.rti_info[RTAX_BRD] 120 121 static __inline void 122 rt_adjustcount(af, cnt) 123 int af, cnt; 124 { 125 route_cb.any_count += cnt; 126 switch (af) { 127 case AF_INET: 128 route_cb.ip_count += cnt; 129 return; 130 #ifdef INET6 131 case AF_INET6: 132 route_cb.ip6_count += cnt; 133 return; 134 #endif 135 case AF_IPX: 136 route_cb.ipx_count += cnt; 137 return; 138 case AF_NS: 139 route_cb.ns_count += cnt; 140 return; 141 case AF_ISO: 142 route_cb.iso_count += cnt; 143 return; 144 } 145 } 146 147 /*ARGSUSED*/ 148 int 149 route_usrreq(so, req, m, nam, control, p) 150 struct socket *so; 151 int req; 152 struct mbuf *m, *nam, *control; 153 struct proc *p; 154 { 155 int error = 0; 156 struct rawcb *rp = sotorawcb(so); 157 int s; 158 159 if (req == PRU_ATTACH) { 160 MALLOC(rp, struct rawcb *, sizeof(*rp), M_PCB, M_WAITOK); 161 if ((so->so_pcb = rp) != NULL) 162 memset(so->so_pcb, 0, sizeof(*rp)); 163 164 } 165 if (req == PRU_DETACH && rp) 166 rt_adjustcount(rp->rcb_proto.sp_protocol, -1); 167 s = splsoftnet(); 168 169 /* 170 * Don't call raw_usrreq() in the attach case, because 171 * we want to allow non-privileged processes to listen on 172 * and send "safe" commands to the routing socket. 173 */ 174 if (req == PRU_ATTACH) { 175 if (p == 0) 176 error = EACCES; 177 else 178 error = raw_attach(so, (int)(long)nam); 179 } else 180 error = raw_usrreq(so, req, m, nam, control, p); 181 182 rp = sotorawcb(so); 183 if (req == PRU_ATTACH && rp) { 184 if (error) { 185 free((caddr_t)rp, M_PCB); 186 splx(s); 187 return (error); 188 } 189 rt_adjustcount(rp->rcb_proto.sp_protocol, 1); 190 rp->rcb_laddr = &route_src; 191 rp->rcb_faddr = &route_dst; 192 soisconnected(so); 193 so->so_options |= SO_USELOOPBACK; 194 } 195 splx(s); 196 return (error); 197 } 198 199 /*ARGSUSED*/ 200 int 201 #if __STDC__ 202 route_output(struct mbuf *m, ...) 203 #else 204 route_output(m, va_alist) 205 struct mbuf *m; 206 va_dcl 207 #endif 208 { 209 struct rt_msghdr *rtm = 0; 210 struct radix_node *rn = 0; 211 struct rtentry *rt = 0; 212 struct rtentry *saved_nrt = 0; 213 struct radix_node_head *rnh; 214 struct rt_addrinfo info; 215 int len, error = 0; 216 struct ifnet *ifp = 0; 217 struct ifaddr *ifa = 0; 218 struct socket *so; 219 va_list ap; 220 221 va_start(ap, m); 222 so = va_arg(ap, struct socket *); 223 va_end(ap); 224 225 #define senderr(e) do { error = e; goto flush;} while (0) 226 if (m == 0 || ((m->m_len < sizeof(int32_t)) && 227 (m = m_pullup(m, sizeof(int32_t))) == 0)) 228 return (ENOBUFS); 229 if ((m->m_flags & M_PKTHDR) == 0) 230 panic("route_output"); 231 len = m->m_pkthdr.len; 232 if (len < sizeof(*rtm) || 233 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 234 dst = 0; 235 senderr(EINVAL); 236 } 237 R_Malloc(rtm, struct rt_msghdr *, len); 238 if (rtm == 0) { 239 dst = 0; 240 senderr(ENOBUFS); 241 } 242 m_copydata(m, 0, len, (caddr_t)rtm); 243 if (rtm->rtm_version != RTM_VERSION) { 244 dst = 0; 245 senderr(EPROTONOSUPPORT); 246 } 247 rtm->rtm_pid = curproc->p_pid; 248 memset(&info, 0, sizeof(info)); 249 info.rti_addrs = rtm->rtm_addrs; 250 if (rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info)) 251 senderr(EINVAL); 252 info.rti_flags = rtm->rtm_flags; 253 if (dst == 0 || (dst->sa_family >= AF_MAX)) 254 senderr(EINVAL); 255 if (gate != 0 && (gate->sa_family >= AF_MAX)) 256 senderr(EINVAL); 257 if (genmask) { 258 struct radix_node *t; 259 t = rn_addmask((caddr_t)genmask, 0, 1); 260 if (t && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0) 261 genmask = (struct sockaddr *)(t->rn_key); 262 else 263 senderr(ENOBUFS); 264 } 265 266 /* 267 * Verify that the caller has the appropriate privilege; RTM_GET 268 * is the only operation the non-superuser is allowed. 269 */ 270 if (rtm->rtm_type != RTM_GET && 271 suser(curproc->p_ucred, &curproc->p_acflag) != 0) 272 senderr(EACCES); 273 274 switch (rtm->rtm_type) { 275 276 case RTM_ADD: 277 if (gate == 0) 278 senderr(EINVAL); 279 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 280 if (error == 0 && saved_nrt) { 281 rt_setmetrics(rtm->rtm_inits, 282 &rtm->rtm_rmx, &saved_nrt->rt_rmx); 283 saved_nrt->rt_refcnt--; 284 saved_nrt->rt_genmask = genmask; 285 } 286 break; 287 288 case RTM_DELETE: 289 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 290 if (error == 0) { 291 (rt = saved_nrt)->rt_refcnt++; 292 goto report; 293 } 294 break; 295 296 case RTM_GET: 297 case RTM_CHANGE: 298 case RTM_LOCK: 299 if ((rnh = rt_tables[dst->sa_family]) == 0) { 300 senderr(EAFNOSUPPORT); 301 } 302 rn = rnh->rnh_lookup(dst, netmask, rnh); 303 if (rn == NULL || (rn->rn_flags & RNF_ROOT) != 0) { 304 senderr(ESRCH); 305 } 306 rt = (struct rtentry *)rn; 307 rt->rt_refcnt++; 308 309 switch(rtm->rtm_type) { 310 311 case RTM_GET: 312 report: 313 dst = rt_key(rt); 314 gate = rt->rt_gateway; 315 netmask = rt_mask(rt); 316 genmask = rt->rt_genmask; 317 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 318 if ((ifp = rt->rt_ifp) != NULL) { 319 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 320 ifaaddr = rt->rt_ifa->ifa_addr; 321 if (ifp->if_flags & IFF_POINTOPOINT) 322 brdaddr = rt->rt_ifa->ifa_dstaddr; 323 else 324 brdaddr = 0; 325 rtm->rtm_index = ifp->if_index; 326 } else { 327 ifpaddr = 0; 328 ifaaddr = 0; 329 } 330 } 331 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)0, 332 (struct walkarg *)0, &len); 333 if (len > rtm->rtm_msglen) { 334 struct rt_msghdr *new_rtm; 335 R_Malloc(new_rtm, struct rt_msghdr *, len); 336 if (new_rtm == 0) 337 senderr(ENOBUFS); 338 Bcopy(rtm, new_rtm, rtm->rtm_msglen); 339 Free(rtm); rtm = new_rtm; 340 } 341 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, 342 (struct walkarg *)0, 0); 343 rtm->rtm_flags = rt->rt_flags; 344 rtm->rtm_rmx = rt->rt_rmx; 345 rtm->rtm_addrs = info.rti_addrs; 346 break; 347 348 case RTM_CHANGE: 349 /* 350 * new gateway could require new ifaddr, ifp; 351 * flags may also be different; ifp may be specified 352 * by ll sockaddr when protocol address is ambiguous 353 */ 354 if ((error = rt_getifa(&info)) != 0) 355 senderr(error); 356 if (gate && rt_setgate(rt, rt_key(rt), gate)) 357 senderr(EDQUOT); 358 /* new gateway could require new ifaddr, ifp; 359 flags may also be different; ifp may be specified 360 by ll sockaddr when protocol address is ambiguous */ 361 if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) && 362 (ifp = ifa->ifa_ifp) && (ifaaddr || gate)) 363 ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate, 364 ifp); 365 else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) || 366 (gate && (ifa = ifa_ifwithroute(rt->rt_flags, 367 rt_key(rt), gate)))) 368 ifp = ifa->ifa_ifp; 369 if (ifa) { 370 struct ifaddr *oifa = rt->rt_ifa; 371 if (oifa != ifa) { 372 if (oifa && oifa->ifa_rtrequest) 373 oifa->ifa_rtrequest(RTM_DELETE, rt, 374 &info); 375 IFAFREE(rt->rt_ifa); 376 rt->rt_ifa = ifa; 377 IFAREF(rt->rt_ifa); 378 rt->rt_ifp = ifp; 379 } 380 } 381 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 382 &rt->rt_rmx); 383 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 384 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info); 385 if (genmask) 386 rt->rt_genmask = genmask; 387 /* 388 * Fall into 389 */ 390 case RTM_LOCK: 391 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 392 rt->rt_rmx.rmx_locks |= 393 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 394 break; 395 } 396 break; 397 398 default: 399 senderr(EOPNOTSUPP); 400 } 401 402 flush: 403 if (rtm) { 404 if (error) 405 rtm->rtm_errno = error; 406 else 407 rtm->rtm_flags |= RTF_DONE; 408 } 409 if (rt) 410 rtfree(rt); 411 { 412 struct rawcb *rp = 0; 413 /* 414 * Check to see if we don't want our own messages. 415 */ 416 if ((so->so_options & SO_USELOOPBACK) == 0) { 417 if (route_cb.any_count <= 1) { 418 if (rtm) 419 Free(rtm); 420 m_freem(m); 421 return (error); 422 } 423 /* There is another listener, so construct message */ 424 rp = sotorawcb(so); 425 } 426 if (rtm) { 427 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 428 if (m->m_pkthdr.len < rtm->rtm_msglen) { 429 m_freem(m); 430 m = NULL; 431 } else if (m->m_pkthdr.len > rtm->rtm_msglen) 432 m_adj(m, rtm->rtm_msglen - m->m_pkthdr.len); 433 Free(rtm); 434 } 435 if (rp) 436 rp->rcb_proto.sp_family = 0; /* Avoid us */ 437 if (dst) 438 route_proto.sp_protocol = dst->sa_family; 439 if (m) 440 raw_input(m, &route_proto, &route_src, &route_dst); 441 if (rp) 442 rp->rcb_proto.sp_family = PF_ROUTE; 443 } 444 return (error); 445 } 446 447 void 448 rt_setmetrics(which, in, out) 449 u_long which; 450 struct rt_metrics *in, *out; 451 { 452 #define metric(f, e) if (which & (f)) out->e = in->e; 453 metric(RTV_RPIPE, rmx_recvpipe); 454 metric(RTV_SPIPE, rmx_sendpipe); 455 metric(RTV_SSTHRESH, rmx_ssthresh); 456 metric(RTV_RTT, rmx_rtt); 457 metric(RTV_RTTVAR, rmx_rttvar); 458 metric(RTV_HOPCOUNT, rmx_hopcount); 459 metric(RTV_MTU, rmx_mtu); 460 metric(RTV_EXPIRE, rmx_expire); 461 #undef metric 462 } 463 464 #define ROUNDUP(a) \ 465 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 466 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 467 468 static int 469 rt_xaddrs(cp, cplim, rtinfo) 470 caddr_t cp, cplim; 471 struct rt_addrinfo *rtinfo; 472 { 473 struct sockaddr *sa; 474 int i; 475 476 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 477 if ((rtinfo->rti_addrs & (1 << i)) == 0) 478 continue; 479 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 480 ADVANCE(cp, sa); 481 } 482 483 /* Check for extra addresses specified. */ 484 if ((rtinfo->rti_addrs & (~0 << i)) != 0) 485 return (1); 486 /* Check for bad data length. */ 487 if (cp != cplim) { 488 if (i == RTAX_NETMASK + 1 && 489 cp - ROUNDUP(sa->sa_len) + sa->sa_len == cplim) 490 /* 491 * The last sockaddr was netmask. 492 * We accept this for now for the sake of old 493 * binaries or third party softwares. 494 */ 495 ; 496 else 497 return (1); 498 } 499 return (0); 500 } 501 502 static struct mbuf * 503 rt_msg1(type, rtinfo, data, datalen) 504 int type; 505 struct rt_addrinfo *rtinfo; 506 caddr_t data; 507 int datalen; 508 { 509 struct rt_msghdr *rtm; 510 struct mbuf *m; 511 int i; 512 struct sockaddr *sa; 513 int len, dlen; 514 515 m = m_gethdr(M_DONTWAIT, MT_DATA); 516 if (m == 0) 517 return (m); 518 switch (type) { 519 520 case RTM_DELADDR: 521 case RTM_NEWADDR: 522 len = sizeof(struct ifa_msghdr); 523 break; 524 525 #ifdef COMPAT_14 526 case RTM_OIFINFO: 527 len = sizeof(struct if_msghdr14); 528 break; 529 #endif 530 531 case RTM_IFINFO: 532 len = sizeof(struct if_msghdr); 533 break; 534 535 case RTM_IFANNOUNCE: 536 len = sizeof(struct if_announcemsghdr); 537 break; 538 539 default: 540 len = sizeof(struct rt_msghdr); 541 } 542 if (len > MHLEN + MLEN) 543 panic("rt_msg1: message too long"); 544 else if (len > MHLEN) { 545 m->m_next = m_get(M_DONTWAIT, MT_DATA); 546 if (m->m_next == NULL) { 547 m_freem(m); 548 return (NULL); 549 } 550 m->m_pkthdr.len = len; 551 m->m_len = MHLEN; 552 m->m_next->m_len = len - MHLEN; 553 } else { 554 m->m_pkthdr.len = m->m_len = len; 555 } 556 m->m_pkthdr.rcvif = 0; 557 m_copyback(m, 0, datalen, data); 558 rtm = mtod(m, struct rt_msghdr *); 559 for (i = 0; i < RTAX_MAX; i++) { 560 if ((sa = rtinfo->rti_info[i]) == NULL) 561 continue; 562 rtinfo->rti_addrs |= (1 << i); 563 dlen = ROUNDUP(sa->sa_len); 564 m_copyback(m, len, dlen, (caddr_t)sa); 565 len += dlen; 566 } 567 if (m->m_pkthdr.len != len) { 568 m_freem(m); 569 return (NULL); 570 } 571 rtm->rtm_msglen = len; 572 rtm->rtm_version = RTM_VERSION; 573 rtm->rtm_type = type; 574 return (m); 575 } 576 577 /* 578 * rt_msg2 579 * 580 * fills 'cp' or 'w'.w_tmem with the routing socket message and 581 * returns the length of the message in 'lenp'. 582 * 583 * if walkarg is 0, cp is expected to be 0 or a buffer large enough to hold 584 * the message 585 * otherwise walkarg's w_needed is updated and if the user buffer is 586 * specified and w_needed indicates space exists the information is copied 587 * into the temp space (w_tmem). w_tmem is [re]allocated if necessary, 588 * if the allocation fails ENOBUFS is returned. 589 */ 590 static int 591 rt_msg2(type, rtinfo, cp, w, lenp) 592 int type; 593 struct rt_addrinfo *rtinfo; 594 caddr_t cp; 595 struct walkarg *w; 596 int *lenp; 597 { 598 int i; 599 int len, dlen, second_time = 0; 600 caddr_t cp0; 601 602 rtinfo->rti_addrs = 0; 603 again: 604 switch (type) { 605 606 case RTM_DELADDR: 607 case RTM_NEWADDR: 608 len = sizeof(struct ifa_msghdr); 609 break; 610 #ifdef COMPAT_14 611 case RTM_OIFINFO: 612 len = sizeof(struct if_msghdr14); 613 break; 614 #endif 615 616 case RTM_IFINFO: 617 len = sizeof(struct if_msghdr); 618 break; 619 620 default: 621 len = sizeof(struct rt_msghdr); 622 } 623 if ((cp0 = cp) != NULL) 624 cp += len; 625 for (i = 0; i < RTAX_MAX; i++) { 626 struct sockaddr *sa; 627 628 if ((sa = rtinfo->rti_info[i]) == 0) 629 continue; 630 rtinfo->rti_addrs |= (1 << i); 631 dlen = ROUNDUP(sa->sa_len); 632 if (cp) { 633 bcopy(sa, cp, (unsigned)dlen); 634 cp += dlen; 635 } 636 len += dlen; 637 } 638 if (cp == 0 && w != NULL && !second_time) { 639 struct walkarg *rw = w; 640 641 rw->w_needed += len; 642 if (rw->w_needed <= 0 && rw->w_where) { 643 if (rw->w_tmemsize < len) { 644 if (rw->w_tmem) 645 free(rw->w_tmem, M_RTABLE); 646 rw->w_tmem = (caddr_t) malloc(len, M_RTABLE, 647 M_NOWAIT); 648 if (rw->w_tmem) 649 rw->w_tmemsize = len; 650 } 651 if (rw->w_tmem) { 652 cp = rw->w_tmem; 653 second_time = 1; 654 goto again; 655 } else { 656 rw->w_tmemneeded = len; 657 return (ENOBUFS); 658 } 659 } 660 } 661 if (cp) { 662 struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 663 664 rtm->rtm_version = RTM_VERSION; 665 rtm->rtm_type = type; 666 rtm->rtm_msglen = len; 667 } 668 if (lenp) 669 *lenp = len; 670 return (0); 671 } 672 673 /* 674 * This routine is called to generate a message from the routing 675 * socket indicating that a redirect has occured, a routing lookup 676 * has failed, or that a protocol has detected timeouts to a particular 677 * destination. 678 */ 679 void 680 rt_missmsg(type, rtinfo, flags, error) 681 int type, flags, error; 682 struct rt_addrinfo *rtinfo; 683 { 684 struct rt_msghdr rtm; 685 struct mbuf *m; 686 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 687 688 if (route_cb.any_count == 0) 689 return; 690 memset(&rtm, 0, sizeof(rtm)); 691 rtm.rtm_flags = RTF_DONE | flags; 692 rtm.rtm_errno = error; 693 m = rt_msg1(type, rtinfo, (caddr_t)&rtm, sizeof(rtm)); 694 if (m == 0) 695 return; 696 mtod(m, struct rt_msghdr *)->rtm_addrs = rtinfo->rti_addrs; 697 route_proto.sp_protocol = sa ? sa->sa_family : 0; 698 raw_input(m, &route_proto, &route_src, &route_dst); 699 } 700 701 /* 702 * This routine is called to generate a message from the routing 703 * socket indicating that the status of a network interface has changed. 704 */ 705 void 706 rt_ifmsg(ifp) 707 struct ifnet *ifp; 708 { 709 struct if_msghdr ifm; 710 #ifdef COMPAT_14 711 struct if_msghdr14 oifm; 712 #endif 713 struct mbuf *m; 714 struct rt_addrinfo info; 715 716 if (route_cb.any_count == 0) 717 return; 718 memset(&info, 0, sizeof(info)); 719 memset(&ifm, 0, sizeof(ifm)); 720 ifm.ifm_index = ifp->if_index; 721 ifm.ifm_flags = ifp->if_flags; 722 ifm.ifm_data = ifp->if_data; 723 ifm.ifm_addrs = 0; 724 m = rt_msg1(RTM_IFINFO, &info, (caddr_t)&ifm, sizeof(ifm)); 725 if (m == 0) 726 return; 727 route_proto.sp_protocol = 0; 728 raw_input(m, &route_proto, &route_src, &route_dst); 729 #ifdef COMPAT_14 730 memset(&info, 0, sizeof(info)); 731 memset(&oifm, 0, sizeof(oifm)); 732 oifm.ifm_index = ifp->if_index; 733 oifm.ifm_flags = ifp->if_flags; 734 oifm.ifm_data.ifi_type = ifp->if_data.ifi_type; 735 oifm.ifm_data.ifi_addrlen = ifp->if_data.ifi_addrlen; 736 oifm.ifm_data.ifi_hdrlen = ifp->if_data.ifi_hdrlen; 737 oifm.ifm_data.ifi_mtu = ifp->if_data.ifi_mtu; 738 oifm.ifm_data.ifi_metric = ifp->if_data.ifi_metric; 739 oifm.ifm_data.ifi_baudrate = ifp->if_data.ifi_baudrate; 740 oifm.ifm_data.ifi_ipackets = ifp->if_data.ifi_ipackets; 741 oifm.ifm_data.ifi_ierrors = ifp->if_data.ifi_ierrors; 742 oifm.ifm_data.ifi_opackets = ifp->if_data.ifi_opackets; 743 oifm.ifm_data.ifi_oerrors = ifp->if_data.ifi_oerrors; 744 oifm.ifm_data.ifi_collisions = ifp->if_data.ifi_collisions; 745 oifm.ifm_data.ifi_ibytes = ifp->if_data.ifi_ibytes; 746 oifm.ifm_data.ifi_obytes = ifp->if_data.ifi_obytes; 747 oifm.ifm_data.ifi_imcasts = ifp->if_data.ifi_imcasts; 748 oifm.ifm_data.ifi_omcasts = ifp->if_data.ifi_omcasts; 749 oifm.ifm_data.ifi_iqdrops = ifp->if_data.ifi_iqdrops; 750 oifm.ifm_data.ifi_noproto = ifp->if_data.ifi_noproto; 751 oifm.ifm_data.ifi_lastchange = ifp->if_data.ifi_lastchange; 752 oifm.ifm_addrs = 0; 753 m = rt_msg1(RTM_OIFINFO, &info, (caddr_t)&oifm, sizeof(oifm)); 754 if (m == 0) 755 return; 756 route_proto.sp_protocol = 0; 757 raw_input(m, &route_proto, &route_src, &route_dst); 758 #endif 759 } 760 761 /* 762 * This is called to generate messages from the routing socket 763 * indicating a network interface has had addresses associated with it. 764 * if we ever reverse the logic and replace messages TO the routing 765 * socket indicate a request to configure interfaces, then it will 766 * be unnecessary as the routing socket will automatically generate 767 * copies of it. 768 */ 769 void 770 rt_newaddrmsg(cmd, ifa, error, rt) 771 int cmd, error; 772 struct ifaddr *ifa; 773 struct rtentry *rt; 774 { 775 struct rt_addrinfo info; 776 struct sockaddr *sa = NULL; 777 int pass; 778 struct mbuf *m = NULL; 779 struct ifnet *ifp = ifa->ifa_ifp; 780 781 if (route_cb.any_count == 0) 782 return; 783 for (pass = 1; pass < 3; pass++) { 784 memset(&info, 0, sizeof(info)); 785 if ((cmd == RTM_ADD && pass == 1) || 786 (cmd == RTM_DELETE && pass == 2)) { 787 struct ifa_msghdr ifam; 788 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 789 790 ifaaddr = sa = ifa->ifa_addr; 791 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 792 netmask = ifa->ifa_netmask; 793 brdaddr = ifa->ifa_dstaddr; 794 memset(&ifam, 0, sizeof(ifam)); 795 ifam.ifam_index = ifp->if_index; 796 ifam.ifam_metric = ifa->ifa_metric; 797 ifam.ifam_flags = ifa->ifa_flags; 798 m = rt_msg1(ncmd, &info, (caddr_t)&ifam, sizeof(ifam)); 799 if (m == NULL) 800 continue; 801 mtod(m, struct ifa_msghdr *)->ifam_addrs = 802 info.rti_addrs; 803 } 804 if ((cmd == RTM_ADD && pass == 2) || 805 (cmd == RTM_DELETE && pass == 1)) { 806 struct rt_msghdr rtm; 807 808 if (rt == 0) 809 continue; 810 netmask = rt_mask(rt); 811 dst = sa = rt_key(rt); 812 gate = rt->rt_gateway; 813 memset(&rtm, 0, sizeof(rtm)); 814 rtm.rtm_index = ifp->if_index; 815 rtm.rtm_flags |= rt->rt_flags; 816 rtm.rtm_errno = error; 817 m = rt_msg1(cmd, &info, (caddr_t)&rtm, sizeof(rtm)); 818 if (m == NULL) 819 continue; 820 mtod(m, struct rt_msghdr *)->rtm_addrs = info.rti_addrs; 821 } 822 route_proto.sp_protocol = sa ? sa->sa_family : 0; 823 raw_input(m, &route_proto, &route_src, &route_dst); 824 } 825 } 826 827 /* 828 * This is called to generate routing socket messages indicating 829 * network interface arrival and departure. 830 */ 831 void 832 rt_ifannouncemsg(ifp, what) 833 struct ifnet *ifp; 834 int what; 835 { 836 struct if_announcemsghdr ifan; 837 struct mbuf *m; 838 struct rt_addrinfo info; 839 840 if (route_cb.any_count == 0) 841 return; 842 memset(&info, 0, sizeof(info)); 843 memset(&ifan, 0, sizeof(ifan)); 844 ifan.ifan_index = ifp->if_index; 845 strcpy(ifan.ifan_name, ifp->if_xname); 846 ifan.ifan_what = what; 847 m = rt_msg1(RTM_IFANNOUNCE, &info, (caddr_t)&ifan, sizeof(ifan)); 848 if (m == 0) 849 return; 850 route_proto.sp_protocol = 0; 851 raw_input(m, &route_proto, &route_src, &route_dst); 852 } 853 854 /* 855 * This is used in dumping the kernel table via sysctl(). 856 */ 857 static int 858 sysctl_dumpentry(rn, v) 859 struct radix_node *rn; 860 void *v; 861 { 862 struct walkarg *w = v; 863 struct rtentry *rt = (struct rtentry *)rn; 864 int error = 0, size; 865 struct rt_addrinfo info; 866 867 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 868 return 0; 869 memset(&info, 0, sizeof(info)); 870 dst = rt_key(rt); 871 gate = rt->rt_gateway; 872 netmask = rt_mask(rt); 873 genmask = rt->rt_genmask; 874 if (rt->rt_ifp) { 875 ifpaddr = rt->rt_ifp->if_addrlist.tqh_first->ifa_addr; 876 ifaaddr = rt->rt_ifa->ifa_addr; 877 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 878 brdaddr = rt->rt_ifa->ifa_dstaddr; 879 } 880 if ((error = rt_msg2(RTM_GET, &info, 0, w, &size))) 881 return (error); 882 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 883 struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 884 885 rtm->rtm_flags = rt->rt_flags; 886 rtm->rtm_use = rt->rt_use; 887 rtm->rtm_rmx = rt->rt_rmx; 888 rtm->rtm_index = rt->rt_ifp->if_index; 889 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 890 rtm->rtm_addrs = info.rti_addrs; 891 if ((error = copyout(rtm, w->w_where, size)) != 0) 892 w->w_where = NULL; 893 else 894 w->w_where += size; 895 } 896 return (error); 897 } 898 899 static int 900 sysctl_iflist(af, w, type) 901 int af; 902 struct walkarg *w; 903 int type; 904 { 905 struct ifnet *ifp; 906 struct ifaddr *ifa; 907 struct rt_addrinfo info; 908 int len, error = 0; 909 910 memset(&info, 0, sizeof(info)); 911 for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) { 912 if (w->w_arg && w->w_arg != ifp->if_index) 913 continue; 914 ifa = ifp->if_addrlist.tqh_first; 915 ifpaddr = ifa->ifa_addr; 916 switch(type) { 917 case NET_RT_IFLIST: 918 error = 919 rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w, &len); 920 break; 921 #ifdef COMPAT_14 922 case NET_RT_OIFLIST: 923 error = 924 rt_msg2(RTM_OIFINFO, &info, (caddr_t)0, w, &len); 925 break; 926 #endif 927 default: 928 panic("sysctl_iflist(1)"); 929 } 930 if (error) 931 return (error); 932 ifpaddr = 0; 933 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 934 switch(type) { 935 case NET_RT_IFLIST: { 936 struct if_msghdr *ifm; 937 938 ifm = (struct if_msghdr *)w->w_tmem; 939 ifm->ifm_index = ifp->if_index; 940 ifm->ifm_flags = ifp->if_flags; 941 ifm->ifm_data = ifp->if_data; 942 ifm->ifm_addrs = info.rti_addrs; 943 error = copyout(ifm, w->w_where, len); 944 if (error) 945 return (error); 946 w->w_where += len; 947 break; 948 } 949 950 #ifdef COMPAT_14 951 case NET_RT_OIFLIST: { 952 struct if_msghdr14 *ifm; 953 954 ifm = (struct if_msghdr14 *)w->w_tmem; 955 ifm->ifm_index = ifp->if_index; 956 ifm->ifm_flags = ifp->if_flags; 957 ifm->ifm_data.ifi_type = ifp->if_data.ifi_type; 958 ifm->ifm_data.ifi_addrlen = 959 ifp->if_data.ifi_addrlen; 960 ifm->ifm_data.ifi_hdrlen = 961 ifp->if_data.ifi_hdrlen; 962 ifm->ifm_data.ifi_mtu = ifp->if_data.ifi_mtu; 963 ifm->ifm_data.ifi_metric = 964 ifp->if_data.ifi_metric; 965 ifm->ifm_data.ifi_baudrate = 966 ifp->if_data.ifi_baudrate; 967 ifm->ifm_data.ifi_ipackets = 968 ifp->if_data.ifi_ipackets; 969 ifm->ifm_data.ifi_ierrors = 970 ifp->if_data.ifi_ierrors; 971 ifm->ifm_data.ifi_opackets = 972 ifp->if_data.ifi_opackets; 973 ifm->ifm_data.ifi_oerrors = 974 ifp->if_data.ifi_oerrors; 975 ifm->ifm_data.ifi_collisions = 976 ifp->if_data.ifi_collisions; 977 ifm->ifm_data.ifi_ibytes = 978 ifp->if_data.ifi_ibytes; 979 ifm->ifm_data.ifi_obytes = 980 ifp->if_data.ifi_obytes; 981 ifm->ifm_data.ifi_imcasts = 982 ifp->if_data.ifi_imcasts; 983 ifm->ifm_data.ifi_omcasts = 984 ifp->if_data.ifi_omcasts; 985 ifm->ifm_data.ifi_iqdrops = 986 ifp->if_data.ifi_iqdrops; 987 ifm->ifm_data.ifi_noproto = 988 ifp->if_data.ifi_noproto; 989 ifm->ifm_data.ifi_lastchange = 990 ifp->if_data.ifi_lastchange; 991 ifm->ifm_addrs = info.rti_addrs; 992 error = copyout(ifm, w->w_where, len); 993 if (error) 994 return (error); 995 w->w_where += len; 996 break; 997 } 998 #endif 999 default: 1000 panic("sysctl_iflist(2)"); 1001 } 1002 } 1003 while ((ifa = ifa->ifa_list.tqe_next) != NULL) { 1004 if (af && af != ifa->ifa_addr->sa_family) 1005 continue; 1006 ifaaddr = ifa->ifa_addr; 1007 netmask = ifa->ifa_netmask; 1008 brdaddr = ifa->ifa_dstaddr; 1009 if ((error = rt_msg2(RTM_NEWADDR, &info, 0, w, &len))) 1010 return (error); 1011 if (w->w_where && w->w_tmem && w->w_needed <= 0) { 1012 struct ifa_msghdr *ifam; 1013 1014 ifam = (struct ifa_msghdr *)w->w_tmem; 1015 ifam->ifam_index = ifa->ifa_ifp->if_index; 1016 ifam->ifam_flags = ifa->ifa_flags; 1017 ifam->ifam_metric = ifa->ifa_metric; 1018 ifam->ifam_addrs = info.rti_addrs; 1019 error = copyout(w->w_tmem, w->w_where, len); 1020 if (error) 1021 return (error); 1022 w->w_where += len; 1023 } 1024 } 1025 ifaaddr = netmask = brdaddr = 0; 1026 } 1027 return (0); 1028 } 1029 1030 static int 1031 sysctl_rtable(name, namelen, where, given, new, newlen) 1032 int *name; 1033 u_int namelen; 1034 void *where; 1035 size_t *given; 1036 void *new; 1037 size_t newlen; 1038 { 1039 struct radix_node_head *rnh; 1040 int i, s, error = EINVAL; 1041 u_char af; 1042 struct walkarg w; 1043 1044 if (new) 1045 return (EPERM); 1046 if (namelen != 3) 1047 return (EINVAL); 1048 af = name[0]; 1049 w.w_tmemneeded = 0; 1050 w.w_tmemsize = 0; 1051 w.w_tmem = NULL; 1052 again: 1053 /* we may return here if a later [re]alloc of the t_mem buffer fails */ 1054 if (w.w_tmemneeded) { 1055 w.w_tmem = (caddr_t) malloc(w.w_tmemneeded, M_RTABLE, M_WAITOK); 1056 w.w_tmemsize = w.w_tmemneeded; 1057 w.w_tmemneeded = 0; 1058 } 1059 w.w_op = name[1]; 1060 w.w_arg = name[2]; 1061 w.w_given = *given; 1062 w.w_needed = 0 - w.w_given; 1063 w.w_where = where; 1064 1065 s = splsoftnet(); 1066 switch (w.w_op) { 1067 1068 case NET_RT_DUMP: 1069 case NET_RT_FLAGS: 1070 for (i = 1; i <= AF_MAX; i++) 1071 if ((rnh = rt_tables[i]) && (af == 0 || af == i) && 1072 (error = (*rnh->rnh_walktree)(rnh, 1073 sysctl_dumpentry, &w))) 1074 break; 1075 break; 1076 1077 #ifdef COMPAT_14 1078 case NET_RT_OIFLIST: 1079 error = sysctl_iflist(af, &w, w.w_op); 1080 break; 1081 #endif 1082 1083 case NET_RT_IFLIST: 1084 error = sysctl_iflist(af, &w, w.w_op); 1085 } 1086 splx(s); 1087 1088 /* check to see if we couldn't allocate memory with NOWAIT */ 1089 if (error == ENOBUFS && w.w_tmem == 0 && w.w_tmemneeded) 1090 goto again; 1091 1092 if (w.w_tmem) 1093 free(w.w_tmem, M_RTABLE); 1094 w.w_needed += w.w_given; 1095 if (where) { 1096 *given = w.w_where - (caddr_t) where; 1097 if (*given < w.w_needed) 1098 return (ENOMEM); 1099 } else { 1100 *given = (11 * w.w_needed) / 10; 1101 } 1102 return (error); 1103 } 1104 1105 /* 1106 * Definitions of protocols supported in the ROUTE domain. 1107 */ 1108 1109 extern struct domain routedomain; /* or at least forward */ 1110 1111 struct protosw routesw[] = { 1112 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 1113 raw_input, route_output, raw_ctlinput, 0, 1114 route_usrreq, 1115 raw_init, 0, 0, 0, 1116 sysctl_rtable, 1117 } 1118 }; 1119 1120 struct domain routedomain = 1121 { PF_ROUTE, "route", route_init, 0, 0, 1122 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 1123
Indexes created Fri Oct 03 02:09:57 GMT 2025