rtsock.c revision 1.25
1 /* $NetBSD: rtsock.c,v 1.25 1997/12/10 00:47:57 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1991, 1993 5 * The Regents of the University of California. 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)rtsock.c 8.6 (Berkeley) 2/11/95 36 */ 37 38 #include <sys/param.h> 39 #include <sys/systm.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 <vm/vm.h> 48 #include <sys/sysctl.h> 49 50 #include <net/if.h> 51 #include <net/route.h> 52 #include <net/raw_cb.h> 53 54 #include <machine/stdarg.h> 55 56 struct sockaddr route_dst = { 2, PF_ROUTE, }; 57 struct sockaddr route_src = { 2, PF_ROUTE, }; 58 struct sockproto route_proto = { PF_ROUTE, }; 59 60 struct walkarg { 61 int w_op, w_arg, w_given, w_needed, w_tmemsize; 62 caddr_t w_where, w_tmem; 63 }; 64 65 static struct mbuf *rt_msg1 __P((int, struct rt_addrinfo *)); 66 static int rt_msg2 __P((int, struct rt_addrinfo *, caddr_t, struct walkarg *)); 67 static void rt_xaddrs __P((caddr_t, caddr_t, struct rt_addrinfo *)); 68 69 /* Sleazy use of local variables throughout file, warning!!!! */ 70 #define dst info.rti_info[RTAX_DST] 71 #define gate info.rti_info[RTAX_GATEWAY] 72 #define netmask info.rti_info[RTAX_NETMASK] 73 #define genmask info.rti_info[RTAX_GENMASK] 74 #define ifpaddr info.rti_info[RTAX_IFP] 75 #define ifaaddr info.rti_info[RTAX_IFA] 76 #define brdaddr info.rti_info[RTAX_BRD] 77 78 /*ARGSUSED*/ 79 int 80 route_usrreq(so, req, m, nam, control, p) 81 register struct socket *so; 82 int req; 83 struct mbuf *m, *nam, *control; 84 struct proc *p; 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 if ((so->so_pcb = rp) != NULL) 93 bzero(so->so_pcb, sizeof(*rp)); 94 95 } 96 if (req == PRU_DETACH && rp) { 97 int af = rp->rcb_proto.sp_protocol; 98 if (af == AF_INET) 99 route_cb.ip_count--; 100 else if (af == AF_NS) 101 route_cb.ns_count--; 102 else if (af == AF_ISO) 103 route_cb.iso_count--; 104 route_cb.any_count--; 105 } 106 107 s = splsoftnet(); 108 109 /* 110 * Don't call raw_usrreq() in the attach case, because 111 * we want to allow non-privileged processes to listen on 112 * and send "safe" commands to the routing socket. 113 */ 114 if (req == PRU_ATTACH) { 115 if (p == 0) 116 error = EACCES; 117 else 118 error = raw_attach(so, (int)(long)nam); 119 } else 120 error = raw_usrreq(so, req, m, nam, control, p); 121 122 rp = sotorawcb(so); 123 if (req == PRU_ATTACH && rp) { 124 int af = rp->rcb_proto.sp_protocol; 125 if (error) { 126 free((caddr_t)rp, M_PCB); 127 splx(s); 128 return (error); 129 } 130 if (af == AF_INET) 131 route_cb.ip_count++; 132 else if (af == AF_NS) 133 route_cb.ns_count++; 134 else if (af == AF_ISO) 135 route_cb.iso_count++; 136 route_cb.any_count++; 137 rp->rcb_laddr = &route_src; 138 rp->rcb_faddr = &route_dst; 139 soisconnected(so); 140 so->so_options |= SO_USELOOPBACK; 141 } 142 splx(s); 143 return (error); 144 } 145 146 /*ARGSUSED*/ 147 int 148 #if __STDC__ 149 route_output(struct mbuf *m, ...) 150 #else 151 route_output(m, va_alist) 152 struct mbuf *m; 153 va_dcl 154 #endif 155 { 156 register struct rt_msghdr *rtm = 0; 157 register struct rtentry *rt = 0; 158 struct rtentry *saved_nrt = 0; 159 struct radix_node_head *rnh; 160 struct rt_addrinfo info; 161 int len, error = 0; 162 struct ifnet *ifp = 0; 163 struct ifaddr *ifa = 0; 164 struct socket *so; 165 va_list ap; 166 167 va_start(ap, m); 168 so = va_arg(ap, struct socket *); 169 va_end(ap); 170 171 172 #define senderr(e) { error = e; goto flush;} 173 if (m == 0 || ((m->m_len < sizeof(int32_t)) && 174 (m = m_pullup(m, sizeof(int32_t))) == 0)) 175 return (ENOBUFS); 176 if ((m->m_flags & M_PKTHDR) == 0) 177 panic("route_output"); 178 len = m->m_pkthdr.len; 179 if (len < sizeof(*rtm) || 180 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 181 dst = 0; 182 senderr(EINVAL); 183 } 184 R_Malloc(rtm, struct rt_msghdr *, len); 185 if (rtm == 0) { 186 dst = 0; 187 senderr(ENOBUFS); 188 } 189 m_copydata(m, 0, len, (caddr_t)rtm); 190 if (rtm->rtm_version != RTM_VERSION) { 191 dst = 0; 192 senderr(EPROTONOSUPPORT); 193 } 194 rtm->rtm_pid = curproc->p_pid; 195 info.rti_addrs = rtm->rtm_addrs; 196 rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info); 197 if (dst == 0) 198 senderr(EINVAL); 199 if (genmask) { 200 struct radix_node *t; 201 t = rn_addmask((caddr_t)genmask, 0, 1); 202 if (t && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0) 203 genmask = (struct sockaddr *)(t->rn_key); 204 else 205 senderr(ENOBUFS); 206 } 207 208 /* 209 * Verify that the caller has the appropriate privilege; RTM_GET 210 * is the only operation the non-superuser is allowed. 211 */ 212 if (rtm->rtm_type != RTM_GET && 213 suser(curproc->p_ucred, &curproc->p_acflag) != 0) 214 senderr(EACCES); 215 216 switch (rtm->rtm_type) { 217 218 case RTM_ADD: 219 if (gate == 0) 220 senderr(EINVAL); 221 error = rtrequest(RTM_ADD, dst, gate, netmask, 222 rtm->rtm_flags, &saved_nrt); 223 if (error == 0 && saved_nrt) { 224 rt_setmetrics(rtm->rtm_inits, 225 &rtm->rtm_rmx, &saved_nrt->rt_rmx); 226 saved_nrt->rt_refcnt--; 227 saved_nrt->rt_genmask = genmask; 228 } 229 break; 230 231 case RTM_DELETE: 232 error = rtrequest(RTM_DELETE, dst, gate, netmask, 233 rtm->rtm_flags, &saved_nrt); 234 if (error == 0) { 235 (rt = saved_nrt)->rt_refcnt++; 236 goto report; 237 } 238 break; 239 240 case RTM_GET: 241 case RTM_CHANGE: 242 case RTM_LOCK: 243 if ((rnh = rt_tables[dst->sa_family]) == 0) { 244 senderr(EAFNOSUPPORT); 245 } else if ((rt = (struct rtentry *) 246 rnh->rnh_lookup(dst, netmask, rnh)) != NULL) 247 rt->rt_refcnt++; 248 else 249 senderr(ESRCH); 250 switch(rtm->rtm_type) { 251 252 case RTM_GET: 253 report: 254 dst = rt_key(rt); 255 gate = rt->rt_gateway; 256 netmask = rt_mask(rt); 257 genmask = rt->rt_genmask; 258 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 259 if ((ifp = rt->rt_ifp) != NULL) { 260 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 261 ifaaddr = rt->rt_ifa->ifa_addr; 262 if (ifp->if_flags & IFF_POINTOPOINT) 263 brdaddr = rt->rt_ifa->ifa_dstaddr; 264 else 265 brdaddr = 0; 266 rtm->rtm_index = ifp->if_index; 267 } else { 268 ifpaddr = 0; 269 ifaaddr = 0; 270 } 271 } 272 len = rt_msg2(rtm->rtm_type, &info, (caddr_t)0, 273 (struct walkarg *)0); 274 if (len > rtm->rtm_msglen) { 275 struct rt_msghdr *new_rtm; 276 R_Malloc(new_rtm, struct rt_msghdr *, len); 277 if (new_rtm == 0) 278 senderr(ENOBUFS); 279 Bcopy(rtm, new_rtm, rtm->rtm_msglen); 280 Free(rtm); rtm = new_rtm; 281 } 282 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, 283 (struct walkarg *)0); 284 rtm->rtm_flags = rt->rt_flags; 285 rtm->rtm_rmx = rt->rt_rmx; 286 rtm->rtm_addrs = info.rti_addrs; 287 break; 288 289 case RTM_CHANGE: 290 if (gate && rt_setgate(rt, rt_key(rt), gate)) 291 senderr(EDQUOT); 292 /* new gateway could require new ifaddr, ifp; 293 flags may also be different; ifp may be specified 294 by ll sockaddr when protocol address is ambiguous */ 295 if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) && 296 (ifp = ifa->ifa_ifp) && (ifaaddr || gate)) 297 ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate, 298 ifp); 299 else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) || 300 (gate && (ifa = ifa_ifwithroute(rt->rt_flags, 301 rt_key(rt), gate)))) 302 ifp = ifa->ifa_ifp; 303 if (ifa) { 304 register struct ifaddr *oifa = rt->rt_ifa; 305 if (oifa != ifa) { 306 if (oifa && oifa->ifa_rtrequest) 307 oifa->ifa_rtrequest(RTM_DELETE, 308 rt, gate); 309 IFAFREE(rt->rt_ifa); 310 rt->rt_ifa = ifa; 311 ifa->ifa_refcnt++; 312 rt->rt_ifp = ifp; 313 } 314 } 315 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 316 &rt->rt_rmx); 317 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 318 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate); 319 if (genmask) 320 rt->rt_genmask = genmask; 321 /* 322 * Fall into 323 */ 324 case RTM_LOCK: 325 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 326 rt->rt_rmx.rmx_locks |= 327 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 328 break; 329 } 330 break; 331 332 default: 333 senderr(EOPNOTSUPP); 334 } 335 336 flush: 337 if (rtm) { 338 if (error) 339 rtm->rtm_errno = error; 340 else 341 rtm->rtm_flags |= RTF_DONE; 342 } 343 if (rt) 344 rtfree(rt); 345 { 346 register struct rawcb *rp = 0; 347 /* 348 * Check to see if we don't want our own messages. 349 */ 350 if ((so->so_options & SO_USELOOPBACK) == 0) { 351 if (route_cb.any_count <= 1) { 352 if (rtm) 353 Free(rtm); 354 m_freem(m); 355 return (error); 356 } 357 /* There is another listener, so construct message */ 358 rp = sotorawcb(so); 359 } 360 if (rtm) { 361 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 362 Free(rtm); 363 } 364 if (rp) 365 rp->rcb_proto.sp_family = 0; /* Avoid us */ 366 if (dst) 367 route_proto.sp_protocol = dst->sa_family; 368 raw_input(m, &route_proto, &route_src, &route_dst); 369 if (rp) 370 rp->rcb_proto.sp_family = PF_ROUTE; 371 } 372 return (error); 373 } 374 375 void 376 rt_setmetrics(which, in, out) 377 u_long which; 378 register struct rt_metrics *in, *out; 379 { 380 #define metric(f, e) if (which & (f)) out->e = in->e; 381 metric(RTV_RPIPE, rmx_recvpipe); 382 metric(RTV_SPIPE, rmx_sendpipe); 383 metric(RTV_SSTHRESH, rmx_ssthresh); 384 metric(RTV_RTT, rmx_rtt); 385 metric(RTV_RTTVAR, rmx_rttvar); 386 metric(RTV_HOPCOUNT, rmx_hopcount); 387 metric(RTV_MTU, rmx_mtu); 388 metric(RTV_EXPIRE, rmx_expire); 389 #undef metric 390 } 391 392 #define ROUNDUP(a) \ 393 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 394 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 395 396 static void 397 rt_xaddrs(cp, cplim, rtinfo) 398 register caddr_t cp, cplim; 399 register struct rt_addrinfo *rtinfo; 400 { 401 register struct sockaddr *sa; 402 register int i; 403 404 bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info)); 405 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 406 if ((rtinfo->rti_addrs & (1 << i)) == 0) 407 continue; 408 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 409 ADVANCE(cp, sa); 410 } 411 } 412 413 static struct mbuf * 414 rt_msg1(type, rtinfo) 415 int type; 416 register struct rt_addrinfo *rtinfo; 417 { 418 register struct rt_msghdr *rtm; 419 register struct mbuf *m; 420 register int i; 421 register struct sockaddr *sa; 422 int len, dlen; 423 424 m = m_gethdr(M_DONTWAIT, MT_DATA); 425 if (m == 0) 426 return (m); 427 switch (type) { 428 429 case RTM_DELADDR: 430 case RTM_NEWADDR: 431 len = sizeof(struct ifa_msghdr); 432 break; 433 434 case RTM_IFINFO: 435 len = sizeof(struct if_msghdr); 436 break; 437 438 default: 439 len = sizeof(struct rt_msghdr); 440 } 441 if (len > MHLEN) 442 panic("rt_msg1"); 443 m->m_pkthdr.len = m->m_len = len; 444 m->m_pkthdr.rcvif = 0; 445 rtm = mtod(m, struct rt_msghdr *); 446 bzero(rtm, len); 447 for (i = 0; i < RTAX_MAX; i++) { 448 if ((sa = rtinfo->rti_info[i]) == NULL) 449 continue; 450 rtinfo->rti_addrs |= (1 << i); 451 dlen = ROUNDUP(sa->sa_len); 452 m_copyback(m, len, dlen, (caddr_t)sa); 453 len += dlen; 454 } 455 if (m->m_pkthdr.len != len) { 456 m_freem(m); 457 return (NULL); 458 } 459 rtm->rtm_msglen = len; 460 rtm->rtm_version = RTM_VERSION; 461 rtm->rtm_type = type; 462 return (m); 463 } 464 465 static int 466 rt_msg2(type, rtinfo, cp, w) 467 int type; 468 register struct rt_addrinfo *rtinfo; 469 caddr_t cp; 470 struct walkarg *w; 471 { 472 register int i; 473 int len, dlen, second_time = 0; 474 caddr_t cp0; 475 476 rtinfo->rti_addrs = 0; 477 again: 478 switch (type) { 479 480 case RTM_DELADDR: 481 case RTM_NEWADDR: 482 len = sizeof(struct ifa_msghdr); 483 break; 484 485 case RTM_IFINFO: 486 len = sizeof(struct if_msghdr); 487 break; 488 489 default: 490 len = sizeof(struct rt_msghdr); 491 } 492 if ((cp0 = cp) != NULL) 493 cp += len; 494 for (i = 0; i < RTAX_MAX; i++) { 495 register struct sockaddr *sa; 496 497 if ((sa = rtinfo->rti_info[i]) == 0) 498 continue; 499 rtinfo->rti_addrs |= (1 << i); 500 dlen = ROUNDUP(sa->sa_len); 501 if (cp) { 502 bcopy(sa, cp, (unsigned)dlen); 503 cp += dlen; 504 } 505 len += dlen; 506 } 507 if (cp == 0 && w != NULL && !second_time) { 508 register struct walkarg *rw = w; 509 510 rw->w_needed += len; 511 if (rw->w_needed <= 0 && rw->w_where) { 512 if (rw->w_tmemsize < len) { 513 if (rw->w_tmem) 514 free(rw->w_tmem, M_RTABLE); 515 rw->w_tmem = (caddr_t) malloc(len, M_RTABLE, 516 M_NOWAIT); 517 if (rw->w_tmem) 518 rw->w_tmemsize = len; 519 } 520 if (rw->w_tmem) { 521 cp = rw->w_tmem; 522 second_time = 1; 523 goto again; 524 } else 525 rw->w_where = 0; 526 } 527 } 528 if (cp) { 529 register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 530 531 rtm->rtm_version = RTM_VERSION; 532 rtm->rtm_type = type; 533 rtm->rtm_msglen = len; 534 } 535 return (len); 536 } 537 538 /* 539 * This routine is called to generate a message from the routing 540 * socket indicating that a redirect has occured, a routing lookup 541 * has failed, or that a protocol has detected timeouts to a particular 542 * destination. 543 */ 544 void 545 rt_missmsg(type, rtinfo, flags, error) 546 int type, flags, error; 547 register struct rt_addrinfo *rtinfo; 548 { 549 register struct rt_msghdr *rtm; 550 register struct mbuf *m; 551 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 552 553 if (route_cb.any_count == 0) 554 return; 555 m = rt_msg1(type, rtinfo); 556 if (m == 0) 557 return; 558 rtm = mtod(m, struct rt_msghdr *); 559 rtm->rtm_flags = RTF_DONE | flags; 560 rtm->rtm_errno = error; 561 rtm->rtm_addrs = rtinfo->rti_addrs; 562 route_proto.sp_protocol = sa ? sa->sa_family : 0; 563 raw_input(m, &route_proto, &route_src, &route_dst); 564 } 565 566 /* 567 * This routine is called to generate a message from the routing 568 * socket indicating that the status of a network interface has changed. 569 */ 570 void 571 rt_ifmsg(ifp) 572 register struct ifnet *ifp; 573 { 574 register struct if_msghdr *ifm; 575 struct mbuf *m; 576 struct rt_addrinfo info; 577 578 if (route_cb.any_count == 0) 579 return; 580 bzero(&info, sizeof(info)); 581 m = rt_msg1(RTM_IFINFO, &info); 582 if (m == 0) 583 return; 584 ifm = mtod(m, struct if_msghdr *); 585 ifm->ifm_index = ifp->if_index; 586 ifm->ifm_flags = ifp->if_flags; 587 ifm->ifm_data = ifp->if_data; 588 ifm->ifm_addrs = 0; 589 route_proto.sp_protocol = 0; 590 raw_input(m, &route_proto, &route_src, &route_dst); 591 } 592 593 /* 594 * This is called to generate messages from the routing socket 595 * indicating a network interface has had addresses associated with it. 596 * if we ever reverse the logic and replace messages TO the routing 597 * socket indicate a request to configure interfaces, then it will 598 * be unnecessary as the routing socket will automatically generate 599 * copies of it. 600 */ 601 void 602 rt_newaddrmsg(cmd, ifa, error, rt) 603 int cmd, error; 604 register struct ifaddr *ifa; 605 register struct rtentry *rt; 606 { 607 struct rt_addrinfo info; 608 struct sockaddr *sa = NULL; 609 int pass; 610 struct mbuf *m = NULL; 611 struct ifnet *ifp = ifa->ifa_ifp; 612 613 if (route_cb.any_count == 0) 614 return; 615 for (pass = 1; pass < 3; pass++) { 616 bzero(&info, sizeof(info)); 617 if ((cmd == RTM_ADD && pass == 1) || 618 (cmd == RTM_DELETE && pass == 2)) { 619 register struct ifa_msghdr *ifam; 620 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 621 622 ifaaddr = sa = ifa->ifa_addr; 623 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 624 netmask = ifa->ifa_netmask; 625 brdaddr = ifa->ifa_dstaddr; 626 if ((m = rt_msg1(ncmd, &info)) == NULL) 627 continue; 628 ifam = mtod(m, struct ifa_msghdr *); 629 ifam->ifam_index = ifp->if_index; 630 ifam->ifam_metric = ifa->ifa_metric; 631 ifam->ifam_flags = ifa->ifa_flags; 632 ifam->ifam_addrs = info.rti_addrs; 633 } 634 if ((cmd == RTM_ADD && pass == 2) || 635 (cmd == RTM_DELETE && pass == 1)) { 636 register struct rt_msghdr *rtm; 637 638 if (rt == 0) 639 continue; 640 netmask = rt_mask(rt); 641 dst = sa = rt_key(rt); 642 gate = rt->rt_gateway; 643 if ((m = rt_msg1(cmd, &info)) == NULL) 644 continue; 645 rtm = mtod(m, struct rt_msghdr *); 646 rtm->rtm_index = ifp->if_index; 647 rtm->rtm_flags |= rt->rt_flags; 648 rtm->rtm_errno = error; 649 rtm->rtm_addrs = info.rti_addrs; 650 } 651 route_proto.sp_protocol = sa ? sa->sa_family : 0; 652 raw_input(m, &route_proto, &route_src, &route_dst); 653 } 654 } 655 656 /* 657 * This is used in dumping the kernel table via sysctl(). 658 */ 659 int 660 sysctl_dumpentry(rn, v) 661 struct radix_node *rn; 662 register void *v; 663 { 664 register struct walkarg *w = v; 665 register struct rtentry *rt = (struct rtentry *)rn; 666 int error = 0, size; 667 struct rt_addrinfo info; 668 669 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 670 return 0; 671 bzero(&info, sizeof(info)); 672 dst = rt_key(rt); 673 gate = rt->rt_gateway; 674 netmask = rt_mask(rt); 675 genmask = rt->rt_genmask; 676 if (rt->rt_ifp) { 677 ifpaddr = rt->rt_ifp->if_addrlist.tqh_first->ifa_addr; 678 ifaaddr = rt->rt_ifa->ifa_addr; 679 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 680 brdaddr = rt->rt_ifa->ifa_dstaddr; 681 } 682 size = rt_msg2(RTM_GET, &info, 0, w); 683 if (w->w_where && w->w_tmem) { 684 register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 685 686 rtm->rtm_flags = rt->rt_flags; 687 rtm->rtm_use = rt->rt_use; 688 rtm->rtm_rmx = rt->rt_rmx; 689 rtm->rtm_index = rt->rt_ifp->if_index; 690 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 691 rtm->rtm_addrs = info.rti_addrs; 692 if ((error = copyout(rtm, w->w_where, size)) != 0) 693 w->w_where = NULL; 694 else 695 w->w_where += size; 696 } 697 return (error); 698 } 699 700 int 701 sysctl_iflist(af, w) 702 int af; 703 register struct walkarg *w; 704 { 705 register struct ifnet *ifp; 706 register struct ifaddr *ifa; 707 struct rt_addrinfo info; 708 int len, error = 0; 709 710 bzero(&info, sizeof(info)); 711 for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) { 712 if (w->w_arg && w->w_arg != ifp->if_index) 713 continue; 714 ifa = ifp->if_addrlist.tqh_first; 715 ifpaddr = ifa->ifa_addr; 716 len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w); 717 ifpaddr = 0; 718 if (w->w_where && w->w_tmem) { 719 register struct if_msghdr *ifm; 720 721 ifm = (struct if_msghdr *)w->w_tmem; 722 ifm->ifm_index = ifp->if_index; 723 ifm->ifm_flags = ifp->if_flags; 724 ifm->ifm_data = ifp->if_data; 725 ifm->ifm_addrs = info.rti_addrs; 726 error = copyout(ifm, w->w_where, len); 727 if (error) 728 return (error); 729 w->w_where += len; 730 } 731 while ((ifa = ifa->ifa_list.tqe_next) != NULL) { 732 if (af && af != ifa->ifa_addr->sa_family) 733 continue; 734 ifaaddr = ifa->ifa_addr; 735 netmask = ifa->ifa_netmask; 736 brdaddr = ifa->ifa_dstaddr; 737 len = rt_msg2(RTM_NEWADDR, &info, 0, w); 738 if (w->w_where && w->w_tmem) { 739 register struct ifa_msghdr *ifam; 740 741 ifam = (struct ifa_msghdr *)w->w_tmem; 742 ifam->ifam_index = ifa->ifa_ifp->if_index; 743 ifam->ifam_flags = ifa->ifa_flags; 744 ifam->ifam_metric = ifa->ifa_metric; 745 ifam->ifam_addrs = info.rti_addrs; 746 error = copyout(w->w_tmem, w->w_where, len); 747 if (error) 748 return (error); 749 w->w_where += len; 750 } 751 } 752 ifaaddr = netmask = brdaddr = 0; 753 } 754 return (0); 755 } 756 757 int 758 sysctl_rtable(name, namelen, where, given, new, newlen) 759 int *name; 760 u_int namelen; 761 void *where; 762 size_t *given; 763 void *new; 764 size_t newlen; 765 { 766 register struct radix_node_head *rnh; 767 int i, s, error = EINVAL; 768 u_char af; 769 struct walkarg w; 770 771 if (new) 772 return (EPERM); 773 if (namelen != 3) 774 return (EINVAL); 775 af = name[0]; 776 Bzero(&w, sizeof(w)); 777 w.w_where = where; 778 w.w_given = *given; 779 w.w_needed = 0 - w.w_given; 780 w.w_op = name[1]; 781 w.w_arg = name[2]; 782 783 s = splsoftnet(); 784 switch (w.w_op) { 785 786 case NET_RT_DUMP: 787 case NET_RT_FLAGS: 788 for (i = 1; i <= AF_MAX; i++) 789 if ((rnh = rt_tables[i]) && (af == 0 || af == i) && 790 (error = (*rnh->rnh_walktree)(rnh, 791 sysctl_dumpentry, &w))) 792 break; 793 break; 794 795 case NET_RT_IFLIST: 796 error = sysctl_iflist(af, &w); 797 } 798 splx(s); 799 if (w.w_tmem) 800 free(w.w_tmem, M_RTABLE); 801 w.w_needed += w.w_given; 802 if (where) { 803 *given = w.w_where - (caddr_t) where; 804 if (*given < w.w_needed) 805 return (ENOMEM); 806 } else { 807 *given = (11 * w.w_needed) / 10; 808 } 809 return (error); 810 } 811 812 /* 813 * Definitions of protocols supported in the ROUTE domain. 814 */ 815 816 extern struct domain routedomain; /* or at least forward */ 817 818 struct protosw routesw[] = { 819 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 820 raw_input, route_output, raw_ctlinput, 0, 821 route_usrreq, 822 raw_init, 0, 0, 0, 823 sysctl_rtable, 824 } 825 }; 826 827 struct domain routedomain = 828 { PF_ROUTE, "route", route_init, 0, 0, 829 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 830
Indexes created Mon Sep 22 10:09:38 GMT 2025