rtsock.c revision 1.27
1 /* $NetBSD: rtsock.c,v 1.27 1998/12/10 15:52:40 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 8.7 (Berkeley) 10/12/95 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 static __inline void rt_adjustcount __P((int, int)); 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 static __inline void 80 rt_adjustcount(af, cnt) 81 int af, cnt; 82 { 83 route_cb.any_count--; 84 switch (af) { 85 case AF_INET: 86 route_cb.ip_count += cnt; 87 return; 88 case AF_IPX: 89 route_cb.ipx_count += cnt; 90 return; 91 case AF_NS: 92 route_cb.ns_count += cnt; 93 return; 94 case AF_ISO: 95 route_cb.iso_count += cnt; 96 return; 97 } 98 } 99 100 /*ARGSUSED*/ 101 int 102 route_usrreq(so, req, m, nam, control, p) 103 register struct socket *so; 104 int req; 105 struct mbuf *m, *nam, *control; 106 struct proc *p; 107 { 108 register int error = 0; 109 register struct rawcb *rp = sotorawcb(so); 110 int s; 111 112 if (req == PRU_ATTACH) { 113 MALLOC(rp, struct rawcb *, sizeof(*rp), M_PCB, M_WAITOK); 114 if ((so->so_pcb = rp) != NULL) 115 bzero(so->so_pcb, sizeof(*rp)); 116 117 } 118 if (req == PRU_DETACH && rp) 119 rt_adjustcount(rp->rcb_proto.sp_protocol, -1); 120 s = splsoftnet(); 121 122 /* 123 * Don't call raw_usrreq() in the attach case, because 124 * we want to allow non-privileged processes to listen on 125 * and send "safe" commands to the routing socket. 126 */ 127 if (req == PRU_ATTACH) { 128 if (p == 0) 129 error = EACCES; 130 else 131 error = raw_attach(so, (int)(long)nam); 132 } else 133 error = raw_usrreq(so, req, m, nam, control, p); 134 135 rp = sotorawcb(so); 136 if (req == PRU_ATTACH && rp) { 137 if (error) { 138 free((caddr_t)rp, M_PCB); 139 splx(s); 140 return (error); 141 } 142 rt_adjustcount(rp->rcb_proto.sp_protocol, 1); 143 rp->rcb_laddr = &route_src; 144 rp->rcb_faddr = &route_dst; 145 soisconnected(so); 146 so->so_options |= SO_USELOOPBACK; 147 } 148 splx(s); 149 return (error); 150 } 151 152 /*ARGSUSED*/ 153 int 154 #if __STDC__ 155 route_output(struct mbuf *m, ...) 156 #else 157 route_output(m, va_alist) 158 struct mbuf *m; 159 va_dcl 160 #endif 161 { 162 register struct rt_msghdr *rtm = 0; 163 register struct rtentry *rt = 0; 164 struct rtentry *saved_nrt = 0; 165 struct radix_node_head *rnh; 166 struct rt_addrinfo info; 167 int len, error = 0; 168 struct ifnet *ifp = 0; 169 struct ifaddr *ifa = 0; 170 struct socket *so; 171 va_list ap; 172 173 va_start(ap, m); 174 so = va_arg(ap, struct socket *); 175 va_end(ap); 176 177 178 #define senderr(e) { error = e; goto flush;} 179 if (m == 0 || ((m->m_len < sizeof(int32_t)) && 180 (m = m_pullup(m, sizeof(int32_t))) == 0)) 181 return (ENOBUFS); 182 if ((m->m_flags & M_PKTHDR) == 0) 183 panic("route_output"); 184 len = m->m_pkthdr.len; 185 if (len < sizeof(*rtm) || 186 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 187 dst = 0; 188 senderr(EINVAL); 189 } 190 R_Malloc(rtm, struct rt_msghdr *, len); 191 if (rtm == 0) { 192 dst = 0; 193 senderr(ENOBUFS); 194 } 195 m_copydata(m, 0, len, (caddr_t)rtm); 196 if (rtm->rtm_version != RTM_VERSION) { 197 dst = 0; 198 senderr(EPROTONOSUPPORT); 199 } 200 rtm->rtm_pid = curproc->p_pid; 201 info.rti_addrs = rtm->rtm_addrs; 202 rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info); 203 if (dst == 0 || (dst->sa_family >= AF_MAX)) 204 senderr(EINVAL); 205 if (gate != 0 && (gate->sa_family >= AF_MAX)) 206 senderr(EINVAL); 207 if (genmask) { 208 struct radix_node *t; 209 t = rn_addmask((caddr_t)genmask, 0, 1); 210 if (t && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0) 211 genmask = (struct sockaddr *)(t->rn_key); 212 else 213 senderr(ENOBUFS); 214 } 215 216 /* 217 * Verify that the caller has the appropriate privilege; RTM_GET 218 * is the only operation the non-superuser is allowed. 219 */ 220 if (rtm->rtm_type != RTM_GET && 221 suser(curproc->p_ucred, &curproc->p_acflag) != 0) 222 senderr(EACCES); 223 224 switch (rtm->rtm_type) { 225 226 case RTM_ADD: 227 if (gate == 0) 228 senderr(EINVAL); 229 error = rtrequest(RTM_ADD, dst, gate, netmask, 230 rtm->rtm_flags, &saved_nrt); 231 if (error == 0 && saved_nrt) { 232 rt_setmetrics(rtm->rtm_inits, 233 &rtm->rtm_rmx, &saved_nrt->rt_rmx); 234 saved_nrt->rt_refcnt--; 235 saved_nrt->rt_genmask = genmask; 236 } 237 break; 238 239 case RTM_DELETE: 240 error = rtrequest(RTM_DELETE, dst, gate, netmask, 241 rtm->rtm_flags, &saved_nrt); 242 if (error == 0) { 243 (rt = saved_nrt)->rt_refcnt++; 244 goto report; 245 } 246 break; 247 248 case RTM_GET: 249 case RTM_CHANGE: 250 case RTM_LOCK: 251 if ((rnh = rt_tables[dst->sa_family]) == 0) { 252 senderr(EAFNOSUPPORT); 253 } else if ((rt = (struct rtentry *) 254 rnh->rnh_lookup(dst, netmask, rnh)) != NULL) 255 rt->rt_refcnt++; 256 else 257 senderr(ESRCH); 258 switch(rtm->rtm_type) { 259 260 case RTM_GET: 261 report: 262 dst = rt_key(rt); 263 gate = rt->rt_gateway; 264 netmask = rt_mask(rt); 265 genmask = rt->rt_genmask; 266 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 267 if ((ifp = rt->rt_ifp) != NULL) { 268 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 269 ifaaddr = rt->rt_ifa->ifa_addr; 270 if (ifp->if_flags & IFF_POINTOPOINT) 271 brdaddr = rt->rt_ifa->ifa_dstaddr; 272 else 273 brdaddr = 0; 274 rtm->rtm_index = ifp->if_index; 275 } else { 276 ifpaddr = 0; 277 ifaaddr = 0; 278 } 279 } 280 len = rt_msg2(rtm->rtm_type, &info, (caddr_t)0, 281 (struct walkarg *)0); 282 if (len > rtm->rtm_msglen) { 283 struct rt_msghdr *new_rtm; 284 R_Malloc(new_rtm, struct rt_msghdr *, len); 285 if (new_rtm == 0) 286 senderr(ENOBUFS); 287 Bcopy(rtm, new_rtm, rtm->rtm_msglen); 288 Free(rtm); rtm = new_rtm; 289 } 290 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, 291 (struct walkarg *)0); 292 rtm->rtm_flags = rt->rt_flags; 293 rtm->rtm_rmx = rt->rt_rmx; 294 rtm->rtm_addrs = info.rti_addrs; 295 break; 296 297 case RTM_CHANGE: 298 if (gate && rt_setgate(rt, rt_key(rt), gate)) 299 senderr(EDQUOT); 300 /* new gateway could require new ifaddr, ifp; 301 flags may also be different; ifp may be specified 302 by ll sockaddr when protocol address is ambiguous */ 303 if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) && 304 (ifp = ifa->ifa_ifp) && (ifaaddr || gate)) 305 ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate, 306 ifp); 307 else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) || 308 (gate && (ifa = ifa_ifwithroute(rt->rt_flags, 309 rt_key(rt), gate)))) 310 ifp = ifa->ifa_ifp; 311 if (ifa) { 312 register struct ifaddr *oifa = rt->rt_ifa; 313 if (oifa != ifa) { 314 if (oifa && oifa->ifa_rtrequest) 315 oifa->ifa_rtrequest(RTM_DELETE, 316 rt, gate); 317 IFAFREE(rt->rt_ifa); 318 rt->rt_ifa = ifa; 319 ifa->ifa_refcnt++; 320 rt->rt_ifp = ifp; 321 } 322 } 323 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 324 &rt->rt_rmx); 325 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 326 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate); 327 if (genmask) 328 rt->rt_genmask = genmask; 329 /* 330 * Fall into 331 */ 332 case RTM_LOCK: 333 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 334 rt->rt_rmx.rmx_locks |= 335 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 336 break; 337 } 338 break; 339 340 default: 341 senderr(EOPNOTSUPP); 342 } 343 344 flush: 345 if (rtm) { 346 if (error) 347 rtm->rtm_errno = error; 348 else 349 rtm->rtm_flags |= RTF_DONE; 350 } 351 if (rt) 352 rtfree(rt); 353 { 354 register struct rawcb *rp = 0; 355 /* 356 * Check to see if we don't want our own messages. 357 */ 358 if ((so->so_options & SO_USELOOPBACK) == 0) { 359 if (route_cb.any_count <= 1) { 360 if (rtm) 361 Free(rtm); 362 m_freem(m); 363 return (error); 364 } 365 /* There is another listener, so construct message */ 366 rp = sotorawcb(so); 367 } 368 if (rtm) { 369 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 370 Free(rtm); 371 } 372 if (rp) 373 rp->rcb_proto.sp_family = 0; /* Avoid us */ 374 if (dst) 375 route_proto.sp_protocol = dst->sa_family; 376 raw_input(m, &route_proto, &route_src, &route_dst); 377 if (rp) 378 rp->rcb_proto.sp_family = PF_ROUTE; 379 } 380 return (error); 381 } 382 383 void 384 rt_setmetrics(which, in, out) 385 u_long which; 386 register struct rt_metrics *in, *out; 387 { 388 #define metric(f, e) if (which & (f)) out->e = in->e; 389 metric(RTV_RPIPE, rmx_recvpipe); 390 metric(RTV_SPIPE, rmx_sendpipe); 391 metric(RTV_SSTHRESH, rmx_ssthresh); 392 metric(RTV_RTT, rmx_rtt); 393 metric(RTV_RTTVAR, rmx_rttvar); 394 metric(RTV_HOPCOUNT, rmx_hopcount); 395 metric(RTV_MTU, rmx_mtu); 396 metric(RTV_EXPIRE, rmx_expire); 397 #undef metric 398 } 399 400 #define ROUNDUP(a) \ 401 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 402 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 403 404 static void 405 rt_xaddrs(cp, cplim, rtinfo) 406 register caddr_t cp, cplim; 407 register struct rt_addrinfo *rtinfo; 408 { 409 register struct sockaddr *sa; 410 register int i; 411 412 bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info)); 413 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 414 if ((rtinfo->rti_addrs & (1 << i)) == 0) 415 continue; 416 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 417 ADVANCE(cp, sa); 418 } 419 } 420 421 static struct mbuf * 422 rt_msg1(type, rtinfo) 423 int type; 424 register struct rt_addrinfo *rtinfo; 425 { 426 register struct rt_msghdr *rtm; 427 register struct mbuf *m; 428 register int i; 429 register struct sockaddr *sa; 430 int len, dlen; 431 432 m = m_gethdr(M_DONTWAIT, MT_DATA); 433 if (m == 0) 434 return (m); 435 switch (type) { 436 437 case RTM_DELADDR: 438 case RTM_NEWADDR: 439 len = sizeof(struct ifa_msghdr); 440 break; 441 442 case RTM_IFINFO: 443 len = sizeof(struct if_msghdr); 444 break; 445 446 default: 447 len = sizeof(struct rt_msghdr); 448 } 449 if (len > MHLEN) 450 panic("rt_msg1"); 451 m->m_pkthdr.len = m->m_len = len; 452 m->m_pkthdr.rcvif = 0; 453 rtm = mtod(m, struct rt_msghdr *); 454 bzero(rtm, len); 455 for (i = 0; i < RTAX_MAX; i++) { 456 if ((sa = rtinfo->rti_info[i]) == NULL) 457 continue; 458 rtinfo->rti_addrs |= (1 << i); 459 dlen = ROUNDUP(sa->sa_len); 460 m_copyback(m, len, dlen, (caddr_t)sa); 461 len += dlen; 462 } 463 if (m->m_pkthdr.len != len) { 464 m_freem(m); 465 return (NULL); 466 } 467 rtm->rtm_msglen = len; 468 rtm->rtm_version = RTM_VERSION; 469 rtm->rtm_type = type; 470 return (m); 471 } 472 473 static int 474 rt_msg2(type, rtinfo, cp, w) 475 int type; 476 register struct rt_addrinfo *rtinfo; 477 caddr_t cp; 478 struct walkarg *w; 479 { 480 register int i; 481 int len, dlen, second_time = 0; 482 caddr_t cp0; 483 484 rtinfo->rti_addrs = 0; 485 again: 486 switch (type) { 487 488 case RTM_DELADDR: 489 case RTM_NEWADDR: 490 len = sizeof(struct ifa_msghdr); 491 break; 492 493 case RTM_IFINFO: 494 len = sizeof(struct if_msghdr); 495 break; 496 497 default: 498 len = sizeof(struct rt_msghdr); 499 } 500 if ((cp0 = cp) != NULL) 501 cp += len; 502 for (i = 0; i < RTAX_MAX; i++) { 503 register struct sockaddr *sa; 504 505 if ((sa = rtinfo->rti_info[i]) == 0) 506 continue; 507 rtinfo->rti_addrs |= (1 << i); 508 dlen = ROUNDUP(sa->sa_len); 509 if (cp) { 510 bcopy(sa, cp, (unsigned)dlen); 511 cp += dlen; 512 } 513 len += dlen; 514 } 515 if (cp == 0 && w != NULL && !second_time) { 516 register struct walkarg *rw = w; 517 518 rw->w_needed += len; 519 if (rw->w_needed <= 0 && rw->w_where) { 520 if (rw->w_tmemsize < len) { 521 if (rw->w_tmem) 522 free(rw->w_tmem, M_RTABLE); 523 rw->w_tmem = (caddr_t) malloc(len, M_RTABLE, 524 M_NOWAIT); 525 if (rw->w_tmem) 526 rw->w_tmemsize = len; 527 } 528 if (rw->w_tmem) { 529 cp = rw->w_tmem; 530 second_time = 1; 531 goto again; 532 } else 533 rw->w_where = 0; 534 } 535 } 536 if (cp) { 537 register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 538 539 rtm->rtm_version = RTM_VERSION; 540 rtm->rtm_type = type; 541 rtm->rtm_msglen = len; 542 } 543 return (len); 544 } 545 546 /* 547 * This routine is called to generate a message from the routing 548 * socket indicating that a redirect has occured, a routing lookup 549 * has failed, or that a protocol has detected timeouts to a particular 550 * destination. 551 */ 552 void 553 rt_missmsg(type, rtinfo, flags, error) 554 int type, flags, error; 555 register struct rt_addrinfo *rtinfo; 556 { 557 register struct rt_msghdr *rtm; 558 register struct mbuf *m; 559 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 560 561 if (route_cb.any_count == 0) 562 return; 563 m = rt_msg1(type, rtinfo); 564 if (m == 0) 565 return; 566 rtm = mtod(m, struct rt_msghdr *); 567 rtm->rtm_flags = RTF_DONE | flags; 568 rtm->rtm_errno = error; 569 rtm->rtm_addrs = rtinfo->rti_addrs; 570 route_proto.sp_protocol = sa ? sa->sa_family : 0; 571 raw_input(m, &route_proto, &route_src, &route_dst); 572 } 573 574 /* 575 * This routine is called to generate a message from the routing 576 * socket indicating that the status of a network interface has changed. 577 */ 578 void 579 rt_ifmsg(ifp) 580 register struct ifnet *ifp; 581 { 582 register struct if_msghdr *ifm; 583 struct mbuf *m; 584 struct rt_addrinfo info; 585 586 if (route_cb.any_count == 0) 587 return; 588 bzero(&info, sizeof(info)); 589 m = rt_msg1(RTM_IFINFO, &info); 590 if (m == 0) 591 return; 592 ifm = mtod(m, struct if_msghdr *); 593 ifm->ifm_index = ifp->if_index; 594 ifm->ifm_flags = ifp->if_flags; 595 ifm->ifm_data = ifp->if_data; 596 ifm->ifm_addrs = 0; 597 route_proto.sp_protocol = 0; 598 raw_input(m, &route_proto, &route_src, &route_dst); 599 } 600 601 /* 602 * This is called to generate messages from the routing socket 603 * indicating a network interface has had addresses associated with it. 604 * if we ever reverse the logic and replace messages TO the routing 605 * socket indicate a request to configure interfaces, then it will 606 * be unnecessary as the routing socket will automatically generate 607 * copies of it. 608 */ 609 void 610 rt_newaddrmsg(cmd, ifa, error, rt) 611 int cmd, error; 612 register struct ifaddr *ifa; 613 register struct rtentry *rt; 614 { 615 struct rt_addrinfo info; 616 struct sockaddr *sa = NULL; 617 int pass; 618 struct mbuf *m = NULL; 619 struct ifnet *ifp = ifa->ifa_ifp; 620 621 if (route_cb.any_count == 0) 622 return; 623 for (pass = 1; pass < 3; pass++) { 624 bzero(&info, sizeof(info)); 625 if ((cmd == RTM_ADD && pass == 1) || 626 (cmd == RTM_DELETE && pass == 2)) { 627 register struct ifa_msghdr *ifam; 628 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 629 630 ifaaddr = sa = ifa->ifa_addr; 631 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 632 netmask = ifa->ifa_netmask; 633 brdaddr = ifa->ifa_dstaddr; 634 if ((m = rt_msg1(ncmd, &info)) == NULL) 635 continue; 636 ifam = mtod(m, struct ifa_msghdr *); 637 ifam->ifam_index = ifp->if_index; 638 ifam->ifam_metric = ifa->ifa_metric; 639 ifam->ifam_flags = ifa->ifa_flags; 640 ifam->ifam_addrs = info.rti_addrs; 641 } 642 if ((cmd == RTM_ADD && pass == 2) || 643 (cmd == RTM_DELETE && pass == 1)) { 644 register struct rt_msghdr *rtm; 645 646 if (rt == 0) 647 continue; 648 netmask = rt_mask(rt); 649 dst = sa = rt_key(rt); 650 gate = rt->rt_gateway; 651 if ((m = rt_msg1(cmd, &info)) == NULL) 652 continue; 653 rtm = mtod(m, struct rt_msghdr *); 654 rtm->rtm_index = ifp->if_index; 655 rtm->rtm_flags |= rt->rt_flags; 656 rtm->rtm_errno = error; 657 rtm->rtm_addrs = info.rti_addrs; 658 } 659 route_proto.sp_protocol = sa ? sa->sa_family : 0; 660 raw_input(m, &route_proto, &route_src, &route_dst); 661 } 662 } 663 664 /* 665 * This is used in dumping the kernel table via sysctl(). 666 */ 667 int 668 sysctl_dumpentry(rn, v) 669 struct radix_node *rn; 670 register void *v; 671 { 672 register struct walkarg *w = v; 673 register struct rtentry *rt = (struct rtentry *)rn; 674 int error = 0, size; 675 struct rt_addrinfo info; 676 677 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 678 return 0; 679 bzero(&info, sizeof(info)); 680 dst = rt_key(rt); 681 gate = rt->rt_gateway; 682 netmask = rt_mask(rt); 683 genmask = rt->rt_genmask; 684 if (rt->rt_ifp) { 685 ifpaddr = rt->rt_ifp->if_addrlist.tqh_first->ifa_addr; 686 ifaaddr = rt->rt_ifa->ifa_addr; 687 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 688 brdaddr = rt->rt_ifa->ifa_dstaddr; 689 } 690 size = rt_msg2(RTM_GET, &info, 0, w); 691 if (w->w_where && w->w_tmem) { 692 register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 693 694 rtm->rtm_flags = rt->rt_flags; 695 rtm->rtm_use = rt->rt_use; 696 rtm->rtm_rmx = rt->rt_rmx; 697 rtm->rtm_index = rt->rt_ifp->if_index; 698 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 699 rtm->rtm_addrs = info.rti_addrs; 700 if ((error = copyout(rtm, w->w_where, size)) != 0) 701 w->w_where = NULL; 702 else 703 w->w_where += size; 704 } 705 return (error); 706 } 707 708 int 709 sysctl_iflist(af, w) 710 int af; 711 register struct walkarg *w; 712 { 713 register struct ifnet *ifp; 714 register struct ifaddr *ifa; 715 struct rt_addrinfo info; 716 int len, error = 0; 717 718 bzero(&info, sizeof(info)); 719 for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) { 720 if (w->w_arg && w->w_arg != ifp->if_index) 721 continue; 722 ifa = ifp->if_addrlist.tqh_first; 723 ifpaddr = ifa->ifa_addr; 724 len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w); 725 ifpaddr = 0; 726 if (w->w_where && w->w_tmem) { 727 register struct if_msghdr *ifm; 728 729 ifm = (struct if_msghdr *)w->w_tmem; 730 ifm->ifm_index = ifp->if_index; 731 ifm->ifm_flags = ifp->if_flags; 732 ifm->ifm_data = ifp->if_data; 733 ifm->ifm_addrs = info.rti_addrs; 734 error = copyout(ifm, w->w_where, len); 735 if (error) 736 return (error); 737 w->w_where += len; 738 } 739 while ((ifa = ifa->ifa_list.tqe_next) != NULL) { 740 if (af && af != ifa->ifa_addr->sa_family) 741 continue; 742 ifaaddr = ifa->ifa_addr; 743 netmask = ifa->ifa_netmask; 744 brdaddr = ifa->ifa_dstaddr; 745 len = rt_msg2(RTM_NEWADDR, &info, 0, w); 746 if (w->w_where && w->w_tmem) { 747 register struct ifa_msghdr *ifam; 748 749 ifam = (struct ifa_msghdr *)w->w_tmem; 750 ifam->ifam_index = ifa->ifa_ifp->if_index; 751 ifam->ifam_flags = ifa->ifa_flags; 752 ifam->ifam_metric = ifa->ifa_metric; 753 ifam->ifam_addrs = info.rti_addrs; 754 error = copyout(w->w_tmem, w->w_where, len); 755 if (error) 756 return (error); 757 w->w_where += len; 758 } 759 } 760 ifaaddr = netmask = brdaddr = 0; 761 } 762 return (0); 763 } 764 765 int 766 sysctl_rtable(name, namelen, where, given, new, newlen) 767 int *name; 768 u_int namelen; 769 void *where; 770 size_t *given; 771 void *new; 772 size_t newlen; 773 { 774 register struct radix_node_head *rnh; 775 int i, s, error = EINVAL; 776 u_char af; 777 struct walkarg w; 778 779 if (new) 780 return (EPERM); 781 if (namelen != 3) 782 return (EINVAL); 783 af = name[0]; 784 Bzero(&w, sizeof(w)); 785 w.w_where = where; 786 w.w_given = *given; 787 w.w_needed = 0 - w.w_given; 788 w.w_op = name[1]; 789 w.w_arg = name[2]; 790 791 s = splsoftnet(); 792 switch (w.w_op) { 793 794 case NET_RT_DUMP: 795 case NET_RT_FLAGS: 796 for (i = 1; i <= AF_MAX; i++) 797 if ((rnh = rt_tables[i]) && (af == 0 || af == i) && 798 (error = (*rnh->rnh_walktree)(rnh, 799 sysctl_dumpentry, &w))) 800 break; 801 break; 802 803 case NET_RT_IFLIST: 804 error = sysctl_iflist(af, &w); 805 } 806 splx(s); 807 if (w.w_tmem) 808 free(w.w_tmem, M_RTABLE); 809 w.w_needed += w.w_given; 810 if (where) { 811 *given = w.w_where - (caddr_t) where; 812 if (*given < w.w_needed) 813 return (ENOMEM); 814 } else { 815 *given = (11 * w.w_needed) / 10; 816 } 817 return (error); 818 } 819 820 /* 821 * Definitions of protocols supported in the ROUTE domain. 822 */ 823 824 extern struct domain routedomain; /* or at least forward */ 825 826 struct protosw routesw[] = { 827 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 828 raw_input, route_output, raw_ctlinput, 0, 829 route_usrreq, 830 raw_init, 0, 0, 0, 831 sysctl_rtable, 832 } 833 }; 834 835 struct domain routedomain = 836 { PF_ROUTE, "route", route_init, 0, 0, 837 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 838
Indexes created Fri Oct 03 02:09:57 GMT 2025