1 /* 2 * Copyright (c) 1988, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)rtsock.c 8.5 (Berkeley) 11/2/94 34 * $Id: rtsock.c,v 1.14 1995/10/09 04:06:28 bde Exp $ 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/proc.h> 41 #include <sys/mbuf.h> 42 #include <sys/socket.h> 43 #include <sys/socketvar.h> 44 #include <sys/domain.h> 45 #include <sys/protosw.h> 46 47 #include <net/if.h> 48 #include <net/route.h> 49 #include <net/raw_cb.h> 50 51 struct sockaddr route_dst = { 2, PF_ROUTE, }; 52 struct sockaddr route_src = { 2, PF_ROUTE, }; 53 struct sockproto route_proto = { PF_ROUTE, }; 54 55 struct walkarg { 56 int w_op, w_arg, w_given, w_needed, w_tmemsize; 57 caddr_t w_where, w_tmem; 58 }; 59 60 static struct mbuf * 61 rt_msg1 __P((int, struct rt_addrinfo *)); 62 static int rt_msg2 __P((int, 63 struct rt_addrinfo *, caddr_t, struct walkarg *)); 64 static void rt_xaddrs __P((caddr_t, caddr_t, struct rt_addrinfo *)); 65 extern int sysctl_dumpentry __P((struct radix_node *rn, void *vw)); 66 extern int sysctl_iflist __P((int af, struct walkarg *w)); 67 extern int sysctl_rtable __P((int *name, u_int namelen, void* where, 68 size_t *given, void *new, size_t newlen)); 69 70 /* Sleazy use of local variables throughout file, warning!!!! */ 71 #define dst info.rti_info[RTAX_DST] 72 #define gate info.rti_info[RTAX_GATEWAY] 73 #define netmask info.rti_info[RTAX_NETMASK] 74 #define genmask info.rti_info[RTAX_GENMASK] 75 #define ifpaddr info.rti_info[RTAX_IFP] 76 #define ifaaddr info.rti_info[RTAX_IFA] 77 #define brdaddr info.rti_info[RTAX_BRD] 78 79 /*ARGSUSED*/ 80 int 81 route_usrreq(so, req, m, nam, control) 82 register struct socket *so; 83 int req; 84 struct mbuf *m, *nam, *control; 85 { 86 register int error = 0; 87 register struct rawcb *rp = sotorawcb(so); 88 int s; 89 90 if (req == PRU_ATTACH) { 91 MALLOC(rp, struct rawcb *, sizeof(*rp), M_PCB, M_WAITOK); 92 so->so_pcb = (caddr_t)rp; 93 if (so->so_pcb) 94 bzero(so->so_pcb, sizeof(*rp)); 95 96 } 97 if (req == PRU_DETACH && rp) { 98 int af = rp->rcb_proto.sp_protocol; 99 if (af == AF_INET) 100 route_cb.ip_count--; 101 else if (af == AF_NS) 102 route_cb.ns_count--; 103 else if (af == AF_ISO) 104 route_cb.iso_count--; 105 route_cb.any_count--; 106 } 107 s = splnet(); 108 error = raw_usrreq(so, req, m, nam, control); 109 rp = sotorawcb(so); 110 if (req == PRU_ATTACH && rp) { 111 int af = rp->rcb_proto.sp_protocol; 112 if (error) { 113 free((caddr_t)rp, M_PCB); 114 splx(s); 115 return (error); 116 } 117 if (af == AF_INET) 118 route_cb.ip_count++; 119 else if (af == AF_NS) 120 route_cb.ns_count++; 121 else if (af == AF_ISO) 122 route_cb.iso_count++; 123 rp->rcb_faddr = &route_src; 124 route_cb.any_count++; 125 soisconnected(so); 126 so->so_options |= SO_USELOOPBACK; 127 } 128 splx(s); 129 return (error); 130 } 131 132 /*ARGSUSED*/ 133 int 134 route_output(m, so) 135 register struct mbuf *m; 136 struct socket *so; 137 { 138 register struct rt_msghdr *rtm = 0; 139 register struct rtentry *rt = 0; 140 struct rtentry *saved_nrt = 0; 141 struct radix_node_head *rnh; 142 struct rt_addrinfo info; 143 int len, error = 0; 144 struct ifnet *ifp = 0; 145 struct ifaddr *ifa = 0; 146 147 #define senderr(e) { error = e; goto flush;} 148 if (m == 0 || ((m->m_len < sizeof(long)) && 149 (m = m_pullup(m, sizeof(long))) == 0)) 150 return (ENOBUFS); 151 if ((m->m_flags & M_PKTHDR) == 0) 152 panic("route_output"); 153 len = m->m_pkthdr.len; 154 if (len < sizeof(*rtm) || 155 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 156 dst = 0; 157 senderr(EINVAL); 158 } 159 R_Malloc(rtm, struct rt_msghdr *, len); 160 if (rtm == 0) { 161 dst = 0; 162 senderr(ENOBUFS); 163 } 164 m_copydata(m, 0, len, (caddr_t)rtm); 165 if (rtm->rtm_version != RTM_VERSION) { 166 dst = 0; 167 senderr(EPROTONOSUPPORT); 168 } 169 rtm->rtm_pid = curproc->p_pid; 170 info.rti_addrs = rtm->rtm_addrs; 171 rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info); 172 if (dst == 0 || (dst->sa_family >= AF_MAX) 173 || (gate != 0 && (gate->sa_family >= AF_MAX))) 174 senderr(EINVAL); 175 if (genmask) { 176 struct radix_node *t; 177 t = rn_addmask((caddr_t)genmask, 0, 1); 178 if (t && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0) 179 genmask = (struct sockaddr *)(t->rn_key); 180 else 181 senderr(ENOBUFS); 182 } 183 switch (rtm->rtm_type) { 184 185 case RTM_ADD: 186 if (gate == 0) 187 senderr(EINVAL); 188 error = rtrequest(RTM_ADD, dst, gate, netmask, 189 rtm->rtm_flags, &saved_nrt); 190 if (error == 0 && saved_nrt) { 191 rt_setmetrics(rtm->rtm_inits, 192 &rtm->rtm_rmx, &saved_nrt->rt_rmx); 193 saved_nrt->rt_refcnt--; 194 saved_nrt->rt_genmask = genmask; 195 } 196 break; 197 198 case RTM_DELETE: 199 error = rtrequest(RTM_DELETE, dst, gate, netmask, 200 rtm->rtm_flags, &saved_nrt); 201 if (error == 0) { 202 if ((rt = saved_nrt)) 203 rt->rt_refcnt++; 204 goto report; 205 } 206 break; 207 208 case RTM_GET: 209 case RTM_CHANGE: 210 case RTM_LOCK: 211 if ((rnh = rt_tables[dst->sa_family]) == 0) { 212 senderr(EAFNOSUPPORT); 213 } else if (rt = (struct rtentry *) 214 rnh->rnh_lookup(dst, netmask, rnh)) 215 rt->rt_refcnt++; 216 else 217 senderr(ESRCH); 218 switch(rtm->rtm_type) { 219 220 case RTM_GET: 221 report: 222 dst = rt_key(rt); 223 gate = rt->rt_gateway; 224 netmask = rt_mask(rt); 225 genmask = rt->rt_genmask; 226 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 227 ifp = rt->rt_ifp; 228 if (ifp) { 229 ifpaddr = ifp->if_addrlist->ifa_addr; 230 ifaaddr = rt->rt_ifa->ifa_addr; 231 rtm->rtm_index = ifp->if_index; 232 } else { 233 ifpaddr = 0; 234 ifaaddr = 0; 235 } 236 } 237 len = rt_msg2(rtm->rtm_type, &info, (caddr_t)0, 238 (struct walkarg *)0); 239 if (len > rtm->rtm_msglen) { 240 struct rt_msghdr *new_rtm; 241 R_Malloc(new_rtm, struct rt_msghdr *, len); 242 if (new_rtm == 0) 243 senderr(ENOBUFS); 244 Bcopy(rtm, new_rtm, rtm->rtm_msglen); 245 Free(rtm); rtm = new_rtm; 246 } 247 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, 248 (struct walkarg *)0); 249 rtm->rtm_flags = rt->rt_flags; 250 rtm->rtm_rmx = rt->rt_rmx; 251 rtm->rtm_addrs = info.rti_addrs; 252 break; 253 254 case RTM_CHANGE: 255 if (gate && rt_setgate(rt, rt_key(rt), gate)) 256 senderr(EDQUOT); 257 258 /* 259 * If they tried to change things but didn't specify 260 * the required gateway, then just use the old one. 261 * This can happen if the user tries to change the 262 * flags on the default route without changing the 263 * default gateway. Changing flags still doesn't work. 264 */ 265 if ((rt->rt_flags & RTF_GATEWAY) && !gate) 266 gate = rt->rt_gateway; 267 268 /* new gateway could require new ifaddr, ifp; 269 flags may also be different; ifp may be specified 270 by ll sockaddr when protocol address is ambiguous */ 271 if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) && 272 (ifp = ifa->ifa_ifp)) 273 ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate, 274 ifp); 275 else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) || 276 (ifa = ifa_ifwithroute(rt->rt_flags, 277 rt_key(rt), gate))) 278 ifp = ifa->ifa_ifp; 279 if (ifa) { 280 register struct ifaddr *oifa = rt->rt_ifa; 281 if (oifa != ifa) { 282 if (oifa && oifa->ifa_rtrequest) 283 oifa->ifa_rtrequest(RTM_DELETE, 284 rt, gate); 285 IFAFREE(rt->rt_ifa); 286 rt->rt_ifa = ifa; 287 ifa->ifa_refcnt++; 288 rt->rt_ifp = ifp; 289 } 290 } 291 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 292 &rt->rt_rmx); 293 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 294 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate); 295 if (genmask) 296 rt->rt_genmask = genmask; 297 /* 298 * Fall into 299 */ 300 case RTM_LOCK: 301 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 302 rt->rt_rmx.rmx_locks |= 303 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 304 break; 305 } 306 break; 307 308 default: 309 senderr(EOPNOTSUPP); 310 } 311 312 flush: 313 if (rtm) { 314 if (error) 315 rtm->rtm_errno = error; 316 else 317 rtm->rtm_flags |= RTF_DONE; 318 } 319 if (rt) 320 rtfree(rt); 321 { 322 register struct rawcb *rp = 0; 323 /* 324 * Check to see if we don't want our own messages. 325 */ 326 if ((so->so_options & SO_USELOOPBACK) == 0) { 327 if (route_cb.any_count <= 1) { 328 if (rtm) 329 Free(rtm); 330 m_freem(m); 331 return (error); 332 } 333 /* There is another listener, so construct message */ 334 rp = sotorawcb(so); 335 } 336 if (rtm) { 337 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 338 Free(rtm); 339 } 340 if (rp) 341 rp->rcb_proto.sp_family = 0; /* Avoid us */ 342 if (dst) 343 route_proto.sp_protocol = dst->sa_family; 344 raw_input(m, &route_proto, &route_src, &route_dst); 345 if (rp) 346 rp->rcb_proto.sp_family = PF_ROUTE; 347 } 348 return (error); 349 } 350 351 void 352 rt_setmetrics(which, in, out) 353 u_long which; 354 register struct rt_metrics *in, *out; 355 { 356 #define metric(f, e) if (which & (f)) out->e = in->e; 357 metric(RTV_RPIPE, rmx_recvpipe); 358 metric(RTV_SPIPE, rmx_sendpipe); 359 metric(RTV_SSTHRESH, rmx_ssthresh); 360 metric(RTV_RTT, rmx_rtt); 361 metric(RTV_RTTVAR, rmx_rttvar); 362 metric(RTV_HOPCOUNT, rmx_hopcount); 363 metric(RTV_MTU, rmx_mtu); 364 metric(RTV_EXPIRE, rmx_expire); 365 #undef metric 366 } 367 368 #define ROUNDUP(a) \ 369 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 370 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 371 372 static void 373 rt_xaddrs(cp, cplim, rtinfo) 374 register caddr_t cp, cplim; 375 register struct rt_addrinfo *rtinfo; 376 { 377 register struct sockaddr *sa; 378 register int i; 379 380 bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info)); 381 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 382 if ((rtinfo->rti_addrs & (1 << i)) == 0) 383 continue; 384 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 385 ADVANCE(cp, sa); 386 } 387 } 388 389 static struct mbuf * 390 rt_msg1(type, rtinfo) 391 int type; 392 register struct rt_addrinfo *rtinfo; 393 { 394 register struct rt_msghdr *rtm; 395 register struct mbuf *m; 396 register int i; 397 register struct sockaddr *sa; 398 int len, dlen; 399 400 m = m_gethdr(M_DONTWAIT, MT_DATA); 401 if (m == 0) 402 return (m); 403 switch (type) { 404 405 case RTM_DELADDR: 406 case RTM_NEWADDR: 407 len = sizeof(struct ifa_msghdr); 408 break; 409 410 case RTM_IFINFO: 411 len = sizeof(struct if_msghdr); 412 break; 413 414 default: 415 len = sizeof(struct rt_msghdr); 416 } 417 if (len > MHLEN) 418 panic("rt_msg1"); 419 m->m_pkthdr.len = m->m_len = len; 420 m->m_pkthdr.rcvif = 0; 421 rtm = mtod(m, struct rt_msghdr *); 422 bzero((caddr_t)rtm, len); 423 for (i = 0; i < RTAX_MAX; i++) { 424 if ((sa = rtinfo->rti_info[i]) == NULL) 425 continue; 426 rtinfo->rti_addrs |= (1 << i); 427 dlen = ROUNDUP(sa->sa_len); 428 m_copyback(m, len, dlen, (caddr_t)sa); 429 len += dlen; 430 } 431 if (m->m_pkthdr.len != len) { 432 m_freem(m); 433 return (NULL); 434 } 435 rtm->rtm_msglen = len; 436 rtm->rtm_version = RTM_VERSION; 437 rtm->rtm_type = type; 438 return (m); 439 } 440 441 static int 442 rt_msg2(type, rtinfo, cp, w) 443 int type; 444 register struct rt_addrinfo *rtinfo; 445 caddr_t cp; 446 struct walkarg *w; 447 { 448 register int i; 449 int len, dlen, second_time = 0; 450 caddr_t cp0; 451 452 rtinfo->rti_addrs = 0; 453 again: 454 switch (type) { 455 456 case RTM_DELADDR: 457 case RTM_NEWADDR: 458 len = sizeof(struct ifa_msghdr); 459 break; 460 461 case RTM_IFINFO: 462 len = sizeof(struct if_msghdr); 463 break; 464 465 default: 466 len = sizeof(struct rt_msghdr); 467 } 468 cp0 = cp; 469 if (cp0) 470 cp += len; 471 for (i = 0; i < RTAX_MAX; i++) { 472 register struct sockaddr *sa; 473 474 if ((sa = rtinfo->rti_info[i]) == 0) 475 continue; 476 rtinfo->rti_addrs |= (1 << i); 477 dlen = ROUNDUP(sa->sa_len); 478 if (cp) { 479 bcopy((caddr_t)sa, cp, (unsigned)dlen); 480 cp += dlen; 481 } 482 len += dlen; 483 } 484 if (cp == 0 && w != NULL && !second_time) { 485 register struct walkarg *rw = w; 486 487 rw->w_needed += len; 488 if (rw->w_needed <= 0 && rw->w_where) { 489 if (rw->w_tmemsize < len) { 490 if (rw->w_tmem) 491 free(rw->w_tmem, M_RTABLE); 492 rw->w_tmem = (caddr_t) 493 malloc(len, M_RTABLE, M_NOWAIT); 494 if (rw->w_tmem) 495 rw->w_tmemsize = len; 496 } 497 if (rw->w_tmem) { 498 cp = rw->w_tmem; 499 second_time = 1; 500 goto again; 501 } else 502 rw->w_where = 0; 503 } 504 } 505 if (cp) { 506 register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 507 508 rtm->rtm_version = RTM_VERSION; 509 rtm->rtm_type = type; 510 rtm->rtm_msglen = len; 511 } 512 return (len); 513 } 514 515 /* 516 * This routine is called to generate a message from the routing 517 * socket indicating that a redirect has occured, a routing lookup 518 * has failed, or that a protocol has detected timeouts to a particular 519 * destination. 520 */ 521 void 522 rt_missmsg(type, rtinfo, flags, error) 523 int type, flags, error; 524 register struct rt_addrinfo *rtinfo; 525 { 526 register struct rt_msghdr *rtm; 527 register struct mbuf *m; 528 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 529 530 if (route_cb.any_count == 0) 531 return; 532 m = rt_msg1(type, rtinfo); 533 if (m == 0) 534 return; 535 rtm = mtod(m, struct rt_msghdr *); 536 rtm->rtm_flags = RTF_DONE | flags; 537 rtm->rtm_errno = error; 538 rtm->rtm_addrs = rtinfo->rti_addrs; 539 route_proto.sp_protocol = sa ? sa->sa_family : 0; 540 raw_input(m, &route_proto, &route_src, &route_dst); 541 } 542 543 /* 544 * This routine is called to generate a message from the routing 545 * socket indicating that the status of a network interface has changed. 546 */ 547 void 548 rt_ifmsg(ifp) 549 register struct ifnet *ifp; 550 { 551 register struct if_msghdr *ifm; 552 struct mbuf *m; 553 struct rt_addrinfo info; 554 555 if (route_cb.any_count == 0) 556 return; 557 bzero((caddr_t)&info, sizeof(info)); 558 m = rt_msg1(RTM_IFINFO, &info); 559 if (m == 0) 560 return; 561 ifm = mtod(m, struct if_msghdr *); 562 ifm->ifm_index = ifp->if_index; 563 ifm->ifm_flags = (u_short)ifp->if_flags; 564 ifm->ifm_data = ifp->if_data; 565 ifm->ifm_addrs = 0; 566 route_proto.sp_protocol = 0; 567 raw_input(m, &route_proto, &route_src, &route_dst); 568 } 569 570 /* 571 * This is called to generate messages from the routing socket 572 * indicating a network interface has had addresses associated with it. 573 * if we ever reverse the logic and replace messages TO the routing 574 * socket indicate a request to configure interfaces, then it will 575 * be unnecessary as the routing socket will automatically generate 576 * copies of it. 577 */ 578 void 579 rt_newaddrmsg(cmd, ifa, error, rt) 580 int cmd, error; 581 register struct ifaddr *ifa; 582 register struct rtentry *rt; 583 { 584 struct rt_addrinfo info; 585 struct sockaddr *sa = 0; 586 int pass; 587 struct mbuf *m = 0; 588 struct ifnet *ifp = ifa->ifa_ifp; 589 590 if (route_cb.any_count == 0) 591 return; 592 for (pass = 1; pass < 3; pass++) { 593 bzero((caddr_t)&info, sizeof(info)); 594 if ((cmd == RTM_ADD && pass == 1) || 595 (cmd == RTM_DELETE && pass == 2)) { 596 register struct ifa_msghdr *ifam; 597 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 598 599 ifaaddr = sa = ifa->ifa_addr; 600 ifpaddr = ifp->if_addrlist->ifa_addr; 601 netmask = ifa->ifa_netmask; 602 brdaddr = ifa->ifa_dstaddr; 603 if ((m = rt_msg1(ncmd, &info)) == NULL) 604 continue; 605 ifam = mtod(m, struct ifa_msghdr *); 606 ifam->ifam_index = ifp->if_index; 607 ifam->ifam_metric = ifa->ifa_metric; 608 ifam->ifam_flags = ifa->ifa_flags; 609 ifam->ifam_addrs = info.rti_addrs; 610 } 611 if ((cmd == RTM_ADD && pass == 2) || 612 (cmd == RTM_DELETE && pass == 1)) { 613 register struct rt_msghdr *rtm; 614 615 if (rt == 0) 616 continue; 617 netmask = rt_mask(rt); 618 dst = sa = rt_key(rt); 619 gate = rt->rt_gateway; 620 if ((m = rt_msg1(cmd, &info)) == NULL) 621 continue; 622 rtm = mtod(m, struct rt_msghdr *); 623 rtm->rtm_index = ifp->if_index; 624 rtm->rtm_flags |= rt->rt_flags; 625 rtm->rtm_errno = error; 626 rtm->rtm_addrs = info.rti_addrs; 627 } 628 route_proto.sp_protocol = sa ? sa->sa_family : 0; 629 raw_input(m, &route_proto, &route_src, &route_dst); 630 } 631 } 632 633 /* 634 * This is used in dumping the kernel table via sysctl(). 635 */ 636 int 637 sysctl_dumpentry(rn, vw) 638 struct radix_node *rn; 639 void *vw; 640 { 641 register struct walkarg *w = vw; 642 register struct rtentry *rt = (struct rtentry *)rn; 643 int error = 0, size; 644 struct rt_addrinfo info; 645 646 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 647 return 0; 648 bzero((caddr_t)&info, sizeof(info)); 649 dst = rt_key(rt); 650 gate = rt->rt_gateway; 651 netmask = rt_mask(rt); 652 genmask = rt->rt_genmask; 653 size = rt_msg2(RTM_GET, &info, 0, w); 654 if (w->w_where && w->w_tmem) { 655 register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 656 657 rtm->rtm_flags = rt->rt_flags; 658 rtm->rtm_use = rt->rt_use; 659 rtm->rtm_rmx = rt->rt_rmx; 660 rtm->rtm_index = rt->rt_ifp->if_index; 661 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 662 rtm->rtm_addrs = info.rti_addrs; 663 error = copyout((caddr_t)rtm, w->w_where, size); 664 if (error) 665 w->w_where = NULL; 666 else 667 w->w_where += size; 668 } 669 return (error); 670 } 671 672 int 673 sysctl_iflist(af, w) 674 int af; 675 register struct walkarg *w; 676 { 677 register struct ifnet *ifp; 678 register struct ifaddr *ifa; 679 struct rt_addrinfo info; 680 int len, error = 0; 681 682 bzero((caddr_t)&info, sizeof(info)); 683 for (ifp = ifnet; ifp; ifp = ifp->if_next) { 684 if (w->w_arg && w->w_arg != ifp->if_index) 685 continue; 686 ifa = ifp->if_addrlist; 687 ifpaddr = ifa->ifa_addr; 688 len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w); 689 ifpaddr = 0; 690 if (w->w_where && w->w_tmem) { 691 register struct if_msghdr *ifm; 692 693 ifm = (struct if_msghdr *)w->w_tmem; 694 ifm->ifm_index = ifp->if_index; 695 ifm->ifm_flags = (u_short)ifp->if_flags; 696 ifm->ifm_data = ifp->if_data; 697 ifm->ifm_addrs = info.rti_addrs; 698 error = copyout((caddr_t)ifm, w->w_where, len); 699 if (error) 700 return (error); 701 w->w_where += len; 702 } 703 while ((ifa = ifa->ifa_next) != 0) { 704 if (af && af != ifa->ifa_addr->sa_family) 705 continue; 706 ifaaddr = ifa->ifa_addr; 707 netmask = ifa->ifa_netmask; 708 brdaddr = ifa->ifa_dstaddr; 709 len = rt_msg2(RTM_NEWADDR, &info, 0, w); 710 if (w->w_where && w->w_tmem) { 711 register struct ifa_msghdr *ifam; 712 713 ifam = (struct ifa_msghdr *)w->w_tmem; 714 ifam->ifam_index = ifa->ifa_ifp->if_index; 715 ifam->ifam_flags = ifa->ifa_flags; 716 ifam->ifam_metric = ifa->ifa_metric; 717 ifam->ifam_addrs = info.rti_addrs; 718 error = copyout(w->w_tmem, w->w_where, len); 719 if (error) 720 return (error); 721 w->w_where += len; 722 } 723 } 724 ifaaddr = netmask = brdaddr = 0; 725 } 726 return (0); 727 } 728 729 int 730 sysctl_rtable(name, namelen, where, given, new, newlen) 731 int *name; 732 u_int namelen; 733 void *where; 734 size_t *given; 735 void *new; 736 size_t newlen; 737 { 738 register struct radix_node_head *rnh; 739 int i, s, error = EINVAL; 740 u_char af; 741 struct walkarg w; 742 743 if (new) 744 return (EPERM); 745 if (namelen != 3) 746 return (EINVAL); 747 af = name[0]; 748 Bzero(&w, sizeof(w)); 749 w.w_where = where; 750 w.w_given = *given; 751 w.w_needed = 0 - w.w_given; 752 w.w_op = name[1]; 753 w.w_arg = name[2]; 754 755 s = splnet(); 756 switch (w.w_op) { 757 758 case NET_RT_DUMP: 759 case NET_RT_FLAGS: 760 for (i = 1; i <= AF_MAX; i++) 761 if ((rnh = rt_tables[i]) && (af == 0 || af == i) && 762 (error = rnh->rnh_walktree(rnh, 763 sysctl_dumpentry, &w))) 764 break; 765 break; 766 767 case NET_RT_IFLIST: 768 error = sysctl_iflist(af, &w); 769 } 770 splx(s); 771 if (w.w_tmem) 772 free(w.w_tmem, M_RTABLE); 773 w.w_needed += w.w_given; 774 if (where) { 775 *given = w.w_where - (caddr_t)where; 776 if (*given < w.w_needed) 777 return (ENOMEM); 778 } else { 779 *given = (11 * w.w_needed) / 10; 780 } 781 return (error); 782 } 783 784 /* 785 * Definitions of protocols supported in the ROUTE domain. 786 */ 787 788 extern struct domain routedomain; /* or at least forward */ 789 790 struct protosw routesw[] = { 791 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 792 raw_input, route_output, raw_ctlinput, 0, 793 route_usrreq, 794 raw_init, 0, 0, 0, 795 sysctl_rtable, 796 } 797 }; 798 799 struct domain routedomain = 800 { PF_ROUTE, "route", route_init, 0, 0, 801 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 802 803 DOMAIN_SET(route); 804