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 1.21 1996/12/11 20:38:16 wollman Exp $ 35 */ 36 37 #include <sys/param.h> 38 #include <sys/queue.h> 39 #include <sys/systm.h> 40 #include <sys/kernel.h> 41 #include <sys/sysctl.h> 42 #include <sys/proc.h> 43 #include <sys/mbuf.h> 44 #include <sys/socket.h> 45 #include <sys/socketvar.h> 46 #include <sys/domain.h> 47 #include <sys/protosw.h> 48 49 #include <net/if.h> 50 #include <net/route.h> 51 #include <net/raw_cb.h> 52 53 static struct sockaddr route_dst = { 2, PF_ROUTE, }; 54 static struct sockaddr route_src = { 2, PF_ROUTE, }; 55 static struct sockproto route_proto = { PF_ROUTE, }; 56 57 struct walkarg { 58 int w_tmemsize; 59 int w_op, w_arg; 60 caddr_t w_tmem; 61 struct sysctl_req *w_req; 62 }; 63 64 static struct mbuf * 65 rt_msg1 __P((int, struct rt_addrinfo *)); 66 static int rt_msg2 __P((int, 67 struct rt_addrinfo *, caddr_t, struct walkarg *)); 68 static void rt_xaddrs __P((caddr_t, caddr_t, struct rt_addrinfo *)); 69 static int sysctl_dumpentry __P((struct radix_node *rn, void *vw)); 70 static int sysctl_iflist __P((int af, struct walkarg *w)); 71 static int route_output __P((struct mbuf *, struct socket *)); 72 static int route_usrreq __P((struct socket *, 73 int, struct mbuf *, struct mbuf *, struct mbuf *)); 74 static void rt_setmetrics __P((u_long, struct rt_metrics *, struct rt_metrics *)); 75 76 /* Sleazy use of local variables throughout file, warning!!!! */ 77 #define dst info.rti_info[RTAX_DST] 78 #define gate info.rti_info[RTAX_GATEWAY] 79 #define netmask info.rti_info[RTAX_NETMASK] 80 #define genmask info.rti_info[RTAX_GENMASK] 81 #define ifpaddr info.rti_info[RTAX_IFP] 82 #define ifaaddr info.rti_info[RTAX_IFA] 83 #define brdaddr info.rti_info[RTAX_BRD] 84 85 /*ARGSUSED*/ 86 static int 87 route_usrreq(so, req, m, nam, control) 88 register struct socket *so; 89 int req; 90 struct mbuf *m, *nam, *control; 91 { 92 register int error = 0; 93 register struct rawcb *rp = sotorawcb(so); 94 int s; 95 96 if (req == PRU_ATTACH) { 97 MALLOC(rp, struct rawcb *, sizeof(*rp), M_PCB, M_WAITOK); 98 so->so_pcb = (caddr_t)rp; 99 if (so->so_pcb) 100 bzero(so->so_pcb, sizeof(*rp)); 101 } 102 if (req == PRU_DETACH && rp) { 103 int af = rp->rcb_proto.sp_protocol; 104 if (af == AF_INET) 105 route_cb.ip_count--; 106 else if (af == AF_IPX) 107 route_cb.ipx_count--; 108 else if (af == AF_NS) 109 route_cb.ns_count--; 110 else if (af == AF_ISO) 111 route_cb.iso_count--; 112 route_cb.any_count--; 113 } 114 s = splnet(); 115 error = raw_usrreq(so, req, m, nam, control); 116 rp = sotorawcb(so); 117 if (req == PRU_ATTACH && rp) { 118 int af = rp->rcb_proto.sp_protocol; 119 if (error) { 120 free((caddr_t)rp, M_PCB); 121 splx(s); 122 return (error); 123 } 124 if (af == AF_INET) 125 route_cb.ip_count++; 126 else if (af == AF_IPX) 127 route_cb.ipx_count++; 128 else if (af == AF_NS) 129 route_cb.ns_count++; 130 else if (af == AF_ISO) 131 route_cb.iso_count++; 132 rp->rcb_faddr = &route_src; 133 route_cb.any_count++; 134 soisconnected(so); 135 so->so_options |= SO_USELOOPBACK; 136 } 137 splx(s); 138 return (error); 139 } 140 141 /*ARGSUSED*/ 142 static int 143 route_output(m, so) 144 register struct mbuf *m; 145 struct socket *so; 146 { 147 register struct rt_msghdr *rtm = 0; 148 register struct rtentry *rt = 0; 149 struct rtentry *saved_nrt = 0; 150 struct radix_node_head *rnh; 151 struct rt_addrinfo info; 152 int len, error = 0; 153 struct ifnet *ifp = 0; 154 struct ifaddr *ifa = 0; 155 156 #define senderr(e) { error = e; goto flush;} 157 if (m == 0 || ((m->m_len < sizeof(long)) && 158 (m = m_pullup(m, sizeof(long))) == 0)) 159 return (ENOBUFS); 160 if ((m->m_flags & M_PKTHDR) == 0) 161 panic("route_output"); 162 len = m->m_pkthdr.len; 163 if (len < sizeof(*rtm) || 164 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 165 dst = 0; 166 senderr(EINVAL); 167 } 168 R_Malloc(rtm, struct rt_msghdr *, len); 169 if (rtm == 0) { 170 dst = 0; 171 senderr(ENOBUFS); 172 } 173 m_copydata(m, 0, len, (caddr_t)rtm); 174 if (rtm->rtm_version != RTM_VERSION) { 175 dst = 0; 176 senderr(EPROTONOSUPPORT); 177 } 178 rtm->rtm_pid = curproc->p_pid; 179 info.rti_addrs = rtm->rtm_addrs; 180 rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info); 181 if (dst == 0 || (dst->sa_family >= AF_MAX) 182 || (gate != 0 && (gate->sa_family >= AF_MAX))) 183 senderr(EINVAL); 184 if (genmask) { 185 struct radix_node *t; 186 t = rn_addmask((caddr_t)genmask, 0, 1); 187 if (t && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0) 188 genmask = (struct sockaddr *)(t->rn_key); 189 else 190 senderr(ENOBUFS); 191 } 192 switch (rtm->rtm_type) { 193 194 case RTM_ADD: 195 if (gate == 0) 196 senderr(EINVAL); 197 error = rtrequest(RTM_ADD, dst, gate, netmask, 198 rtm->rtm_flags, &saved_nrt); 199 if (error == 0 && saved_nrt) { 200 rt_setmetrics(rtm->rtm_inits, 201 &rtm->rtm_rmx, &saved_nrt->rt_rmx); 202 saved_nrt->rt_refcnt--; 203 saved_nrt->rt_genmask = genmask; 204 } 205 break; 206 207 case RTM_DELETE: 208 error = rtrequest(RTM_DELETE, dst, gate, netmask, 209 rtm->rtm_flags, &saved_nrt); 210 if (error == 0) { 211 if ((rt = saved_nrt)) 212 rt->rt_refcnt++; 213 goto report; 214 } 215 break; 216 217 case RTM_GET: 218 case RTM_CHANGE: 219 case RTM_LOCK: 220 if ((rnh = rt_tables[dst->sa_family]) == 0) { 221 senderr(EAFNOSUPPORT); 222 } else if (rt = (struct rtentry *) 223 rnh->rnh_lookup(dst, netmask, rnh)) 224 rt->rt_refcnt++; 225 else 226 senderr(ESRCH); 227 switch(rtm->rtm_type) { 228 229 case RTM_GET: 230 report: 231 dst = rt_key(rt); 232 gate = rt->rt_gateway; 233 netmask = rt_mask(rt); 234 genmask = rt->rt_genmask; 235 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 236 ifp = rt->rt_ifp; 237 if (ifp) { 238 ifpaddr = ifp->if_addrhead.tqh_first->ifa_addr; 239 ifaaddr = rt->rt_ifa->ifa_addr; 240 rtm->rtm_index = ifp->if_index; 241 } else { 242 ifpaddr = 0; 243 ifaaddr = 0; 244 } 245 } 246 len = rt_msg2(rtm->rtm_type, &info, (caddr_t)0, 247 (struct walkarg *)0); 248 if (len > rtm->rtm_msglen) { 249 struct rt_msghdr *new_rtm; 250 R_Malloc(new_rtm, struct rt_msghdr *, len); 251 if (new_rtm == 0) 252 senderr(ENOBUFS); 253 Bcopy(rtm, new_rtm, rtm->rtm_msglen); 254 Free(rtm); rtm = new_rtm; 255 } 256 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, 257 (struct walkarg *)0); 258 rtm->rtm_flags = rt->rt_flags; 259 rtm->rtm_rmx = rt->rt_rmx; 260 rtm->rtm_addrs = info.rti_addrs; 261 break; 262 263 case RTM_CHANGE: 264 if (gate && (error = rt_setgate(rt, rt_key(rt), gate))) 265 senderr(error); 266 267 /* 268 * If they tried to change things but didn't specify 269 * the required gateway, then just use the old one. 270 * This can happen if the user tries to change the 271 * flags on the default route without changing the 272 * default gateway. Changing flags still doesn't work. 273 */ 274 if ((rt->rt_flags & RTF_GATEWAY) && !gate) 275 gate = rt->rt_gateway; 276 277 /* new gateway could require new ifaddr, ifp; 278 flags may also be different; ifp may be specified 279 by ll sockaddr when protocol address is ambiguous */ 280 if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) && 281 (ifp = ifa->ifa_ifp)) 282 ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate, 283 ifp); 284 else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) || 285 (ifa = ifa_ifwithroute(rt->rt_flags, 286 rt_key(rt), gate))) 287 ifp = ifa->ifa_ifp; 288 if (ifa) { 289 register struct ifaddr *oifa = rt->rt_ifa; 290 if (oifa != ifa) { 291 if (oifa && oifa->ifa_rtrequest) 292 oifa->ifa_rtrequest(RTM_DELETE, 293 rt, gate); 294 IFAFREE(rt->rt_ifa); 295 rt->rt_ifa = ifa; 296 ifa->ifa_refcnt++; 297 rt->rt_ifp = ifp; 298 } 299 } 300 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 301 &rt->rt_rmx); 302 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 303 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate); 304 if (genmask) 305 rt->rt_genmask = genmask; 306 /* 307 * Fall into 308 */ 309 case RTM_LOCK: 310 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 311 rt->rt_rmx.rmx_locks |= 312 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 313 break; 314 } 315 break; 316 317 default: 318 senderr(EOPNOTSUPP); 319 } 320 321 flush: 322 if (rtm) { 323 if (error) 324 rtm->rtm_errno = error; 325 else 326 rtm->rtm_flags |= RTF_DONE; 327 } 328 if (rt) 329 rtfree(rt); 330 { 331 register struct rawcb *rp = 0; 332 /* 333 * Check to see if we don't want our own messages. 334 */ 335 if ((so->so_options & SO_USELOOPBACK) == 0) { 336 if (route_cb.any_count <= 1) { 337 if (rtm) 338 Free(rtm); 339 m_freem(m); 340 return (error); 341 } 342 /* There is another listener, so construct message */ 343 rp = sotorawcb(so); 344 } 345 if (rtm) { 346 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 347 Free(rtm); 348 } 349 if (rp) 350 rp->rcb_proto.sp_family = 0; /* Avoid us */ 351 if (dst) 352 route_proto.sp_protocol = dst->sa_family; 353 raw_input(m, &route_proto, &route_src, &route_dst); 354 if (rp) 355 rp->rcb_proto.sp_family = PF_ROUTE; 356 } 357 return (error); 358 } 359 360 static void 361 rt_setmetrics(which, in, out) 362 u_long which; 363 register struct rt_metrics *in, *out; 364 { 365 #define metric(f, e) if (which & (f)) out->e = in->e; 366 metric(RTV_RPIPE, rmx_recvpipe); 367 metric(RTV_SPIPE, rmx_sendpipe); 368 metric(RTV_SSTHRESH, rmx_ssthresh); 369 metric(RTV_RTT, rmx_rtt); 370 metric(RTV_RTTVAR, rmx_rttvar); 371 metric(RTV_HOPCOUNT, rmx_hopcount); 372 metric(RTV_MTU, rmx_mtu); 373 metric(RTV_EXPIRE, rmx_expire); 374 #undef metric 375 } 376 377 #define ROUNDUP(a) \ 378 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 379 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 380 381 static void 382 rt_xaddrs(cp, cplim, rtinfo) 383 register caddr_t cp, cplim; 384 register struct rt_addrinfo *rtinfo; 385 { 386 register struct sockaddr *sa; 387 register int i; 388 389 bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info)); 390 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 391 if ((rtinfo->rti_addrs & (1 << i)) == 0) 392 continue; 393 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 394 ADVANCE(cp, sa); 395 } 396 } 397 398 static struct mbuf * 399 rt_msg1(type, rtinfo) 400 int type; 401 register struct rt_addrinfo *rtinfo; 402 { 403 register struct rt_msghdr *rtm; 404 register struct mbuf *m; 405 register int i; 406 register struct sockaddr *sa; 407 int len, dlen; 408 409 m = m_gethdr(M_DONTWAIT, MT_DATA); 410 if (m == 0) 411 return (m); 412 switch (type) { 413 414 case RTM_DELADDR: 415 case RTM_NEWADDR: 416 len = sizeof(struct ifa_msghdr); 417 break; 418 419 case RTM_IFINFO: 420 len = sizeof(struct if_msghdr); 421 break; 422 423 default: 424 len = sizeof(struct rt_msghdr); 425 } 426 if (len > MHLEN) 427 panic("rt_msg1"); 428 m->m_pkthdr.len = m->m_len = len; 429 m->m_pkthdr.rcvif = 0; 430 rtm = mtod(m, struct rt_msghdr *); 431 bzero((caddr_t)rtm, len); 432 for (i = 0; i < RTAX_MAX; i++) { 433 if ((sa = rtinfo->rti_info[i]) == NULL) 434 continue; 435 rtinfo->rti_addrs |= (1 << i); 436 dlen = ROUNDUP(sa->sa_len); 437 m_copyback(m, len, dlen, (caddr_t)sa); 438 len += dlen; 439 } 440 if (m->m_pkthdr.len != len) { 441 m_freem(m); 442 return (NULL); 443 } 444 rtm->rtm_msglen = len; 445 rtm->rtm_version = RTM_VERSION; 446 rtm->rtm_type = type; 447 return (m); 448 } 449 450 static int 451 rt_msg2(type, rtinfo, cp, w) 452 int type; 453 register struct rt_addrinfo *rtinfo; 454 caddr_t cp; 455 struct walkarg *w; 456 { 457 register int i; 458 int len, dlen, second_time = 0; 459 caddr_t cp0; 460 461 rtinfo->rti_addrs = 0; 462 again: 463 switch (type) { 464 465 case RTM_DELADDR: 466 case RTM_NEWADDR: 467 len = sizeof(struct ifa_msghdr); 468 break; 469 470 case RTM_IFINFO: 471 len = sizeof(struct if_msghdr); 472 break; 473 474 default: 475 len = sizeof(struct rt_msghdr); 476 } 477 cp0 = cp; 478 if (cp0) 479 cp += len; 480 for (i = 0; i < RTAX_MAX; i++) { 481 register struct sockaddr *sa; 482 483 if ((sa = rtinfo->rti_info[i]) == 0) 484 continue; 485 rtinfo->rti_addrs |= (1 << i); 486 dlen = ROUNDUP(sa->sa_len); 487 if (cp) { 488 bcopy((caddr_t)sa, cp, (unsigned)dlen); 489 cp += dlen; 490 } 491 len += dlen; 492 } 493 if (cp == 0 && w != NULL && !second_time) { 494 register struct walkarg *rw = w; 495 496 if (rw->w_req) { 497 if (rw->w_tmemsize < len) { 498 if (rw->w_tmem) 499 free(rw->w_tmem, M_RTABLE); 500 rw->w_tmem = (caddr_t) 501 malloc(len, M_RTABLE, M_NOWAIT); 502 if (rw->w_tmem) 503 rw->w_tmemsize = len; 504 } 505 if (rw->w_tmem) { 506 cp = rw->w_tmem; 507 second_time = 1; 508 goto again; 509 } 510 } 511 } 512 if (cp) { 513 register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 514 515 rtm->rtm_version = RTM_VERSION; 516 rtm->rtm_type = type; 517 rtm->rtm_msglen = len; 518 } 519 return (len); 520 } 521 522 /* 523 * This routine is called to generate a message from the routing 524 * socket indicating that a redirect has occured, a routing lookup 525 * has failed, or that a protocol has detected timeouts to a particular 526 * destination. 527 */ 528 void 529 rt_missmsg(type, rtinfo, flags, error) 530 int type, flags, error; 531 register struct rt_addrinfo *rtinfo; 532 { 533 register struct rt_msghdr *rtm; 534 register struct mbuf *m; 535 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 536 537 if (route_cb.any_count == 0) 538 return; 539 m = rt_msg1(type, rtinfo); 540 if (m == 0) 541 return; 542 rtm = mtod(m, struct rt_msghdr *); 543 rtm->rtm_flags = RTF_DONE | flags; 544 rtm->rtm_errno = error; 545 rtm->rtm_addrs = rtinfo->rti_addrs; 546 route_proto.sp_protocol = sa ? sa->sa_family : 0; 547 raw_input(m, &route_proto, &route_src, &route_dst); 548 } 549 550 /* 551 * This routine is called to generate a message from the routing 552 * socket indicating that the status of a network interface has changed. 553 */ 554 void 555 rt_ifmsg(ifp) 556 register struct ifnet *ifp; 557 { 558 register struct if_msghdr *ifm; 559 struct mbuf *m; 560 struct rt_addrinfo info; 561 562 if (route_cb.any_count == 0) 563 return; 564 bzero((caddr_t)&info, sizeof(info)); 565 m = rt_msg1(RTM_IFINFO, &info); 566 if (m == 0) 567 return; 568 ifm = mtod(m, struct if_msghdr *); 569 ifm->ifm_index = ifp->if_index; 570 ifm->ifm_flags = (u_short)ifp->if_flags; 571 ifm->ifm_data = ifp->if_data; 572 ifm->ifm_addrs = 0; 573 route_proto.sp_protocol = 0; 574 raw_input(m, &route_proto, &route_src, &route_dst); 575 } 576 577 /* 578 * This is called to generate messages from the routing socket 579 * indicating a network interface has had addresses associated with it. 580 * if we ever reverse the logic and replace messages TO the routing 581 * socket indicate a request to configure interfaces, then it will 582 * be unnecessary as the routing socket will automatically generate 583 * copies of it. 584 */ 585 void 586 rt_newaddrmsg(cmd, ifa, error, rt) 587 int cmd, error; 588 register struct ifaddr *ifa; 589 register struct rtentry *rt; 590 { 591 struct rt_addrinfo info; 592 struct sockaddr *sa = 0; 593 int pass; 594 struct mbuf *m = 0; 595 struct ifnet *ifp = ifa->ifa_ifp; 596 597 if (route_cb.any_count == 0) 598 return; 599 for (pass = 1; pass < 3; pass++) { 600 bzero((caddr_t)&info, sizeof(info)); 601 if ((cmd == RTM_ADD && pass == 1) || 602 (cmd == RTM_DELETE && pass == 2)) { 603 register struct ifa_msghdr *ifam; 604 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 605 606 ifaaddr = sa = ifa->ifa_addr; 607 ifpaddr = ifp->if_addrhead.tqh_first->ifa_addr; 608 netmask = ifa->ifa_netmask; 609 brdaddr = ifa->ifa_dstaddr; 610 if ((m = rt_msg1(ncmd, &info)) == NULL) 611 continue; 612 ifam = mtod(m, struct ifa_msghdr *); 613 ifam->ifam_index = ifp->if_index; 614 ifam->ifam_metric = ifa->ifa_metric; 615 ifam->ifam_flags = ifa->ifa_flags; 616 ifam->ifam_addrs = info.rti_addrs; 617 } 618 if ((cmd == RTM_ADD && pass == 2) || 619 (cmd == RTM_DELETE && pass == 1)) { 620 register struct rt_msghdr *rtm; 621 622 if (rt == 0) 623 continue; 624 netmask = rt_mask(rt); 625 dst = sa = rt_key(rt); 626 gate = rt->rt_gateway; 627 if ((m = rt_msg1(cmd, &info)) == NULL) 628 continue; 629 rtm = mtod(m, struct rt_msghdr *); 630 rtm->rtm_index = ifp->if_index; 631 rtm->rtm_flags |= rt->rt_flags; 632 rtm->rtm_errno = error; 633 rtm->rtm_addrs = info.rti_addrs; 634 } 635 route_proto.sp_protocol = sa ? sa->sa_family : 0; 636 raw_input(m, &route_proto, &route_src, &route_dst); 637 } 638 } 639 640 641 /* 642 * This is used in dumping the kernel table via sysctl(). 643 */ 644 int 645 sysctl_dumpentry(rn, vw) 646 struct radix_node *rn; 647 void *vw; 648 { 649 register struct walkarg *w = vw; 650 register struct rtentry *rt = (struct rtentry *)rn; 651 int error = 0, size; 652 struct rt_addrinfo info; 653 654 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 655 return 0; 656 bzero((caddr_t)&info, sizeof(info)); 657 dst = rt_key(rt); 658 gate = rt->rt_gateway; 659 netmask = rt_mask(rt); 660 genmask = rt->rt_genmask; 661 size = rt_msg2(RTM_GET, &info, 0, w); 662 if (w->w_req && w->w_tmem) { 663 register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 664 665 rtm->rtm_flags = rt->rt_flags; 666 rtm->rtm_use = rt->rt_use; 667 rtm->rtm_rmx = rt->rt_rmx; 668 rtm->rtm_index = rt->rt_ifp->if_index; 669 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 670 rtm->rtm_addrs = info.rti_addrs; 671 error = SYSCTL_OUT(w->w_req, (caddr_t)rtm, size); 672 return (error); 673 } 674 return (error); 675 } 676 677 int 678 sysctl_iflist(af, w) 679 int af; 680 register struct walkarg *w; 681 { 682 register struct ifnet *ifp; 683 register struct ifaddr *ifa; 684 struct rt_addrinfo info; 685 int len, error = 0; 686 687 bzero((caddr_t)&info, sizeof(info)); 688 for (ifp = ifnet.tqh_first; ifp; ifp = ifp->if_link.tqe_next) { 689 if (w->w_arg && w->w_arg != ifp->if_index) 690 continue; 691 ifa = ifp->if_addrhead.tqh_first; 692 ifpaddr = ifa->ifa_addr; 693 len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w); 694 ifpaddr = 0; 695 if (w->w_req && w->w_tmem) { 696 register struct if_msghdr *ifm; 697 698 ifm = (struct if_msghdr *)w->w_tmem; 699 ifm->ifm_index = ifp->if_index; 700 ifm->ifm_flags = (u_short)ifp->if_flags; 701 ifm->ifm_data = ifp->if_data; 702 ifm->ifm_addrs = info.rti_addrs; 703 error = SYSCTL_OUT(w->w_req,(caddr_t)ifm, len); 704 if (error) 705 return (error); 706 } 707 while ((ifa = ifa->ifa_link.tqe_next) != 0) { 708 if (af && af != ifa->ifa_addr->sa_family) 709 continue; 710 ifaaddr = ifa->ifa_addr; 711 netmask = ifa->ifa_netmask; 712 brdaddr = ifa->ifa_dstaddr; 713 len = rt_msg2(RTM_NEWADDR, &info, 0, w); 714 if (w->w_req && w->w_tmem) { 715 register struct ifa_msghdr *ifam; 716 717 ifam = (struct ifa_msghdr *)w->w_tmem; 718 ifam->ifam_index = ifa->ifa_ifp->if_index; 719 ifam->ifam_flags = ifa->ifa_flags; 720 ifam->ifam_metric = ifa->ifa_metric; 721 ifam->ifam_addrs = info.rti_addrs; 722 error = SYSCTL_OUT(w->w_req, w->w_tmem, len); 723 if (error) 724 return (error); 725 } 726 } 727 ifaaddr = netmask = brdaddr = 0; 728 } 729 return (0); 730 } 731 732 static int 733 sysctl_rtsock SYSCTL_HANDLER_ARGS 734 { 735 int *name = (int *)arg1; 736 u_int namelen = arg2; 737 register struct radix_node_head *rnh; 738 int i, s, error = EINVAL; 739 u_char af; 740 struct walkarg w; 741 742 name ++; 743 namelen--; 744 if (req->newptr) 745 return (EPERM); 746 if (namelen != 3) 747 return (EINVAL); 748 af = name[0]; 749 Bzero(&w, sizeof(w)); 750 w.w_op = name[1]; 751 w.w_arg = name[2]; 752 w.w_req = req; 753 754 s = splnet(); 755 switch (w.w_op) { 756 757 case NET_RT_DUMP: 758 case NET_RT_FLAGS: 759 for (i = 1; i <= AF_MAX; i++) 760 if ((rnh = rt_tables[i]) && (af == 0 || af == i) && 761 (error = rnh->rnh_walktree(rnh, 762 sysctl_dumpentry, &w))) 763 break; 764 break; 765 766 case NET_RT_IFLIST: 767 error = sysctl_iflist(af, &w); 768 } 769 splx(s); 770 if (w.w_tmem) 771 free(w.w_tmem, M_RTABLE); 772 return (error); 773 } 774 775 SYSCTL_NODE(_net, PF_ROUTE, routetable, CTLFLAG_RD, sysctl_rtsock,""); 776 777 /* 778 * Definitions of protocols supported in the ROUTE domain. 779 */ 780 781 extern struct domain routedomain; /* or at least forward */ 782 783 static struct protosw routesw[] = { 784 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 785 0, route_output, raw_ctlinput, 0, 786 route_usrreq, 787 raw_init 788 } 789 }; 790 791 static struct domain routedomain = 792 { PF_ROUTE, "route", route_init, 0, 0, 793 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 794 795 DOMAIN_SET(route); 796