rtsock.c revision 1.26.6.1
1 /* $NetBSD: rtsock.c,v 1.26.6.1 1998/12/11 04:53:06 kenh 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 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, *ifa1 = 0, *ifa2=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 || (dst->sa_family >= AF_MAX)) 198 senderr(EINVAL); 199 if (gate != 0 && (gate->sa_family >= AF_MAX)) 200 senderr(EINVAL); 201 if (genmask) { 202 struct radix_node *t; 203 t = rn_addmask((caddr_t)genmask, 0, 1); 204 if (t && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0) 205 genmask = (struct sockaddr *)(t->rn_key); 206 else 207 senderr(ENOBUFS); 208 } 209 210 /* 211 * Verify that the caller has the appropriate privilege; RTM_GET 212 * is the only operation the non-superuser is allowed. 213 */ 214 if (rtm->rtm_type != RTM_GET && 215 suser(curproc->p_ucred, &curproc->p_acflag) != 0) 216 senderr(EACCES); 217 218 switch (rtm->rtm_type) { 219 220 case RTM_ADD: 221 if (gate == 0) 222 senderr(EINVAL); 223 error = rtrequest(RTM_ADD, dst, gate, netmask, 224 rtm->rtm_flags, &saved_nrt); 225 if (error == 0 && saved_nrt) { 226 rt_setmetrics(rtm->rtm_inits, 227 &rtm->rtm_rmx, &saved_nrt->rt_rmx); 228 saved_nrt->rt_refcnt--; 229 saved_nrt->rt_genmask = genmask; 230 } 231 break; 232 233 case RTM_DELETE: 234 error = rtrequest(RTM_DELETE, dst, gate, netmask, 235 rtm->rtm_flags, &saved_nrt); 236 if (error == 0) { 237 (rt = saved_nrt)->rt_refcnt++; 238 goto report; 239 } 240 break; 241 242 case RTM_GET: 243 case RTM_CHANGE: 244 case RTM_LOCK: 245 if ((rnh = rt_tables[dst->sa_family]) == 0) { 246 senderr(EAFNOSUPPORT); 247 } else if ((rt = (struct rtentry *) 248 rnh->rnh_lookup(dst, netmask, rnh)) != NULL) 249 rt->rt_refcnt++; 250 else 251 senderr(ESRCH); 252 switch(rtm->rtm_type) { 253 254 case RTM_GET: 255 report: 256 dst = rt_key(rt); 257 gate = rt->rt_gateway; 258 netmask = rt_mask(rt); 259 genmask = rt->rt_genmask; 260 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 261 if ((ifp = rt->rt_ifp) != NULL) { 262 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 263 ifaaddr = rt->rt_ifa->ifa_addr; 264 if (ifp->if_flags & IFF_POINTOPOINT) 265 brdaddr = rt->rt_ifa->ifa_dstaddr; 266 else 267 brdaddr = 0; 268 rtm->rtm_index = ifp->if_index; 269 } else { 270 ifpaddr = 0; 271 ifaaddr = 0; 272 } 273 } 274 len = rt_msg2(rtm->rtm_type, &info, (caddr_t)0, 275 (struct walkarg *)0); 276 if (len > rtm->rtm_msglen) { 277 struct rt_msghdr *new_rtm; 278 R_Malloc(new_rtm, struct rt_msghdr *, len); 279 if (new_rtm == 0) 280 senderr(ENOBUFS); 281 Bcopy(rtm, new_rtm, rtm->rtm_msglen); 282 Free(rtm); rtm = new_rtm; 283 } 284 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, 285 (struct walkarg *)0); 286 rtm->rtm_flags = rt->rt_flags; 287 rtm->rtm_rmx = rt->rt_rmx; 288 rtm->rtm_addrs = info.rti_addrs; 289 break; 290 291 case RTM_CHANGE: 292 if (gate && rt_setgate(rt, rt_key(rt), gate)) 293 senderr(EDQUOT); 294 /* new gateway could require new ifaddr, ifp; 295 flags may also be different; ifp may be specified 296 by ll sockaddr when protocol address is ambiguous */ 297 if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) && 298 (ifp = ifa->ifa_ifp) && (ifaaddr || gate)) { 299 ifa_delref(ifa); 300 ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate, 301 ifp); 302 } 303 else if ((ifaaddr && (ifa1= ifa_ifwithaddr(ifaaddr))) || 304 (gate && (ifa2 = ifa_ifwithroute(rt->rt_flags, 305 rt_key(rt), gate)))) { 306 if (ifa) 307 ifa_delref(ifa); 308 if ((ifa1) && (ifa2)) { 309 printf("Double whammy in RTM_CHANGE\n"); 310 ifa_delref(ifa1); 311 ifa1 = 0; 312 } 313 ifa = (ifa1) ? ifa1 : ifa2; 314 ifp = ifa->ifa_ifp; 315 } 316 if (ifa) { 317 register struct ifaddr *oifa = rt->rt_ifa; 318 if (oifa != ifa) { 319 if (oifa && oifa->ifa_rtrequest) 320 oifa->ifa_rtrequest(RTM_DELETE, 321 rt, gate); 322 IFAFREE(rt->rt_ifa); 323 rt->rt_ifa = ifa; 324 ifa_addref(ifa); 325 rt->rt_ifp = ifp; 326 if_addref(ifp); 327 } 328 ifa_delref(ifa); 329 } 330 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 331 &rt->rt_rmx); 332 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 333 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate); 334 if (genmask) 335 rt->rt_genmask = genmask; 336 /* 337 * Fall into 338 */ 339 case RTM_LOCK: 340 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 341 rt->rt_rmx.rmx_locks |= 342 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 343 break; 344 } 345 break; 346 347 default: 348 senderr(EOPNOTSUPP); 349 } 350 351 flush: 352 if (rtm) { 353 if (error) 354 rtm->rtm_errno = error; 355 else 356 rtm->rtm_flags |= RTF_DONE; 357 } 358 if (rt) 359 rtfree(rt); 360 { 361 register struct rawcb *rp = 0; 362 /* 363 * Check to see if we don't want our own messages. 364 */ 365 if ((so->so_options & SO_USELOOPBACK) == 0) { 366 if (route_cb.any_count <= 1) { 367 if (rtm) 368 Free(rtm); 369 m_freem(m); 370 return (error); 371 } 372 /* There is another listener, so construct message */ 373 rp = sotorawcb(so); 374 } 375 if (rtm) { 376 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 377 Free(rtm); 378 } 379 if (rp) 380 rp->rcb_proto.sp_family = 0; /* Avoid us */ 381 if (dst) 382 route_proto.sp_protocol = dst->sa_family; 383 raw_input(m, &route_proto, &route_src, &route_dst); 384 if (rp) 385 rp->rcb_proto.sp_family = PF_ROUTE; 386 } 387 return (error); 388 } 389 390 void 391 rt_setmetrics(which, in, out) 392 u_long which; 393 register struct rt_metrics *in, *out; 394 { 395 #define metric(f, e) if (which & (f)) out->e = in->e; 396 metric(RTV_RPIPE, rmx_recvpipe); 397 metric(RTV_SPIPE, rmx_sendpipe); 398 metric(RTV_SSTHRESH, rmx_ssthresh); 399 metric(RTV_RTT, rmx_rtt); 400 metric(RTV_RTTVAR, rmx_rttvar); 401 metric(RTV_HOPCOUNT, rmx_hopcount); 402 metric(RTV_MTU, rmx_mtu); 403 metric(RTV_EXPIRE, rmx_expire); 404 #undef metric 405 } 406 407 #define ROUNDUP(a) \ 408 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 409 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 410 411 static void 412 rt_xaddrs(cp, cplim, rtinfo) 413 register caddr_t cp, cplim; 414 register struct rt_addrinfo *rtinfo; 415 { 416 register struct sockaddr *sa; 417 register int i; 418 419 bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info)); 420 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 421 if ((rtinfo->rti_addrs & (1 << i)) == 0) 422 continue; 423 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 424 ADVANCE(cp, sa); 425 } 426 } 427 428 static struct mbuf * 429 rt_msg1(type, rtinfo) 430 int type; 431 register struct rt_addrinfo *rtinfo; 432 { 433 register struct rt_msghdr *rtm; 434 register struct mbuf *m; 435 register int i; 436 register struct sockaddr *sa; 437 int len, dlen; 438 439 m = m_gethdr(M_DONTWAIT, MT_DATA); 440 if (m == 0) 441 return (m); 442 switch (type) { 443 444 case RTM_DELADDR: 445 case RTM_NEWADDR: 446 len = sizeof(struct ifa_msghdr); 447 break; 448 449 case RTM_IFINFO: 450 len = sizeof(struct if_msghdr); 451 break; 452 453 default: 454 len = sizeof(struct rt_msghdr); 455 } 456 if (len > MHLEN) 457 panic("rt_msg1"); 458 m->m_pkthdr.len = m->m_len = len; 459 m->m_pkthdr.rcvif = 0; 460 rtm = mtod(m, struct rt_msghdr *); 461 bzero(rtm, len); 462 for (i = 0; i < RTAX_MAX; i++) { 463 if ((sa = rtinfo->rti_info[i]) == NULL) 464 continue; 465 rtinfo->rti_addrs |= (1 << i); 466 dlen = ROUNDUP(sa->sa_len); 467 m_copyback(m, len, dlen, (caddr_t)sa); 468 len += dlen; 469 } 470 if (m->m_pkthdr.len != len) { 471 m_freem(m); 472 return (NULL); 473 } 474 rtm->rtm_msglen = len; 475 rtm->rtm_version = RTM_VERSION; 476 rtm->rtm_type = type; 477 return (m); 478 } 479 480 static int 481 rt_msg2(type, rtinfo, cp, w) 482 int type; 483 register struct rt_addrinfo *rtinfo; 484 caddr_t cp; 485 struct walkarg *w; 486 { 487 register int i; 488 int len, dlen, second_time = 0; 489 caddr_t cp0; 490 491 rtinfo->rti_addrs = 0; 492 again: 493 switch (type) { 494 495 case RTM_DELADDR: 496 case RTM_NEWADDR: 497 len = sizeof(struct ifa_msghdr); 498 break; 499 500 case RTM_IFINFO: 501 len = sizeof(struct if_msghdr); 502 break; 503 504 default: 505 len = sizeof(struct rt_msghdr); 506 } 507 if ((cp0 = cp) != NULL) 508 cp += len; 509 for (i = 0; i < RTAX_MAX; i++) { 510 register struct sockaddr *sa; 511 512 if ((sa = rtinfo->rti_info[i]) == 0) 513 continue; 514 rtinfo->rti_addrs |= (1 << i); 515 dlen = ROUNDUP(sa->sa_len); 516 if (cp) { 517 bcopy(sa, cp, (unsigned)dlen); 518 cp += dlen; 519 } 520 len += dlen; 521 } 522 if (cp == 0 && w != NULL && !second_time) { 523 register struct walkarg *rw = w; 524 525 rw->w_needed += len; 526 if (rw->w_needed <= 0 && rw->w_where) { 527 if (rw->w_tmemsize < len) { 528 if (rw->w_tmem) 529 free(rw->w_tmem, M_RTABLE); 530 rw->w_tmem = (caddr_t) malloc(len, M_RTABLE, 531 M_NOWAIT); 532 if (rw->w_tmem) 533 rw->w_tmemsize = len; 534 } 535 if (rw->w_tmem) { 536 cp = rw->w_tmem; 537 second_time = 1; 538 goto again; 539 } else 540 rw->w_where = 0; 541 } 542 } 543 if (cp) { 544 register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 545 546 rtm->rtm_version = RTM_VERSION; 547 rtm->rtm_type = type; 548 rtm->rtm_msglen = len; 549 } 550 return (len); 551 } 552 553 /* 554 * This routine is called to generate a message from the routing 555 * socket indicating that a redirect has occured, a routing lookup 556 * has failed, or that a protocol has detected timeouts to a particular 557 * destination. 558 */ 559 void 560 rt_missmsg(type, rtinfo, flags, error) 561 int type, flags, error; 562 register struct rt_addrinfo *rtinfo; 563 { 564 register struct rt_msghdr *rtm; 565 register struct mbuf *m; 566 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 567 568 if (route_cb.any_count == 0) 569 return; 570 m = rt_msg1(type, rtinfo); 571 if (m == 0) 572 return; 573 rtm = mtod(m, struct rt_msghdr *); 574 rtm->rtm_flags = RTF_DONE | flags; 575 rtm->rtm_errno = error; 576 rtm->rtm_addrs = rtinfo->rti_addrs; 577 route_proto.sp_protocol = sa ? sa->sa_family : 0; 578 raw_input(m, &route_proto, &route_src, &route_dst); 579 } 580 581 /* 582 * This routine is called to generate a message from the routing 583 * socket indicating that the status of a network interface has changed. 584 */ 585 void 586 rt_ifmsg(ifp) 587 register struct ifnet *ifp; 588 { 589 register struct if_msghdr *ifm; 590 struct mbuf *m; 591 struct rt_addrinfo info; 592 593 if (route_cb.any_count == 0) 594 return; 595 bzero(&info, sizeof(info)); 596 m = rt_msg1(RTM_IFINFO, &info); 597 if (m == 0) 598 return; 599 ifm = mtod(m, struct if_msghdr *); 600 ifm->ifm_index = ifp->if_index; 601 ifm->ifm_flags = ifp->if_flags; 602 ifm->ifm_data = ifp->if_data; 603 ifm->ifm_addrs = 0; 604 route_proto.sp_protocol = 0; 605 raw_input(m, &route_proto, &route_src, &route_dst); 606 } 607 608 /* 609 * This is called to generate messages from the routing socket 610 * indicating a network interface has had addresses associated with it. 611 * if we ever reverse the logic and replace messages TO the routing 612 * socket indicate a request to configure interfaces, then it will 613 * be unnecessary as the routing socket will automatically generate 614 * copies of it. 615 */ 616 void 617 rt_newaddrmsg(cmd, ifa, error, rt) 618 int cmd, error; 619 register struct ifaddr *ifa; 620 register struct rtentry *rt; 621 { 622 struct rt_addrinfo info; 623 struct sockaddr *sa = NULL; 624 int pass; 625 struct mbuf *m = NULL; 626 struct ifnet *ifp = ifa->ifa_ifp; 627 628 if (route_cb.any_count == 0) 629 return; 630 for (pass = 1; pass < 3; pass++) { 631 bzero(&info, sizeof(info)); 632 if ((cmd == RTM_ADD && pass == 1) || 633 (cmd == RTM_DELETE && pass == 2)) { 634 register struct ifa_msghdr *ifam; 635 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 636 637 ifaaddr = sa = ifa->ifa_addr; 638 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 639 netmask = ifa->ifa_netmask; 640 brdaddr = ifa->ifa_dstaddr; 641 if ((m = rt_msg1(ncmd, &info)) == NULL) 642 continue; 643 ifam = mtod(m, struct ifa_msghdr *); 644 ifam->ifam_index = ifp->if_index; 645 ifam->ifam_metric = ifa->ifa_metric; 646 ifam->ifam_flags = ifa->ifa_flags; 647 ifam->ifam_addrs = info.rti_addrs; 648 } 649 if ((cmd == RTM_ADD && pass == 2) || 650 (cmd == RTM_DELETE && pass == 1)) { 651 register struct rt_msghdr *rtm; 652 653 if (rt == 0) 654 continue; 655 netmask = rt_mask(rt); 656 dst = sa = rt_key(rt); 657 gate = rt->rt_gateway; 658 if ((m = rt_msg1(cmd, &info)) == NULL) 659 continue; 660 rtm = mtod(m, struct rt_msghdr *); 661 rtm->rtm_index = ifp->if_index; 662 rtm->rtm_flags |= rt->rt_flags; 663 rtm->rtm_errno = error; 664 rtm->rtm_addrs = info.rti_addrs; 665 } 666 route_proto.sp_protocol = sa ? sa->sa_family : 0; 667 raw_input(m, &route_proto, &route_src, &route_dst); 668 } 669 } 670 671 /* 672 * This is used in dumping the kernel table via sysctl(). 673 */ 674 int 675 sysctl_dumpentry(rn, v) 676 struct radix_node *rn; 677 register void *v; 678 { 679 register struct walkarg *w = v; 680 register struct rtentry *rt = (struct rtentry *)rn; 681 int error = 0, size; 682 struct rt_addrinfo info; 683 684 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 685 return 0; 686 bzero(&info, sizeof(info)); 687 dst = rt_key(rt); 688 gate = rt->rt_gateway; 689 netmask = rt_mask(rt); 690 genmask = rt->rt_genmask; 691 if (rt->rt_ifp) { 692 ifpaddr = rt->rt_ifp->if_addrlist.tqh_first->ifa_addr; 693 ifaaddr = rt->rt_ifa->ifa_addr; 694 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 695 brdaddr = rt->rt_ifa->ifa_dstaddr; 696 } 697 size = rt_msg2(RTM_GET, &info, 0, w); 698 if (w->w_where && w->w_tmem) { 699 register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 700 701 rtm->rtm_flags = rt->rt_flags; 702 rtm->rtm_use = rt->rt_use; 703 rtm->rtm_rmx = rt->rt_rmx; 704 rtm->rtm_index = rt->rt_ifp->if_index; 705 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 706 rtm->rtm_addrs = info.rti_addrs; 707 if ((error = copyout(rtm, w->w_where, size)) != 0) 708 w->w_where = NULL; 709 else 710 w->w_where += size; 711 } 712 return (error); 713 } 714 715 int 716 sysctl_iflist(af, w) 717 int af; 718 register struct walkarg *w; 719 { 720 register struct ifnet *ifp; 721 register struct ifaddr *ifa; 722 struct rt_addrinfo info; 723 int len, error = 0, s = splimp(); 724 725 bzero(&info, sizeof(info)); 726 for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) { 727 if (w->w_arg && w->w_arg != ifp->if_index) 728 continue; 729 ifa = ifp->if_addrlist.tqh_first; 730 ifpaddr = ifa->ifa_addr; 731 len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w); 732 ifpaddr = 0; 733 if (w->w_where && w->w_tmem) { 734 register struct if_msghdr *ifm; 735 736 ifm = (struct if_msghdr *)w->w_tmem; 737 ifm->ifm_index = ifp->if_index; 738 ifm->ifm_flags = ifp->if_flags; 739 ifm->ifm_data = ifp->if_data; 740 ifm->ifm_addrs = info.rti_addrs; 741 error = copyout(ifm, w->w_where, len); 742 if (error) { 743 splx(s); 744 return (error); 745 } 746 w->w_where += len; 747 } 748 while ((ifa = ifa->ifa_list.tqe_next) != NULL) { 749 if (af && af != ifa->ifa_addr->sa_family) 750 continue; 751 ifaaddr = ifa->ifa_addr; 752 netmask = ifa->ifa_netmask; 753 brdaddr = ifa->ifa_dstaddr; 754 len = rt_msg2(RTM_NEWADDR, &info, 0, w); 755 if (w->w_where && w->w_tmem) { 756 register struct ifa_msghdr *ifam; 757 758 ifam = (struct ifa_msghdr *)w->w_tmem; 759 ifam->ifam_index = ifa->ifa_ifp->if_index; 760 ifam->ifam_flags = ifa->ifa_flags; 761 ifam->ifam_metric = ifa->ifa_metric; 762 ifam->ifam_addrs = info.rti_addrs; 763 error = copyout(w->w_tmem, w->w_where, len); 764 if (error) { 765 splx(s); 766 return (error); 767 } 768 w->w_where += len; 769 } 770 } 771 ifaaddr = netmask = brdaddr = 0; 772 } 773 splx(s); 774 return (0); 775 } 776 777 int 778 sysctl_rtable(name, namelen, where, given, new, newlen) 779 int *name; 780 u_int namelen; 781 void *where; 782 size_t *given; 783 void *new; 784 size_t newlen; 785 { 786 register struct radix_node_head *rnh; 787 int i, s, error = EINVAL; 788 u_char af; 789 struct walkarg w; 790 791 if (new) 792 return (EPERM); 793 if (namelen != 3) 794 return (EINVAL); 795 af = name[0]; 796 Bzero(&w, sizeof(w)); 797 w.w_where = where; 798 w.w_given = *given; 799 w.w_needed = 0 - w.w_given; 800 w.w_op = name[1]; 801 w.w_arg = name[2]; 802 803 s = splsoftnet(); 804 switch (w.w_op) { 805 806 case NET_RT_DUMP: 807 case NET_RT_FLAGS: 808 for (i = 1; i <= AF_MAX; i++) 809 if ((rnh = rt_tables[i]) && (af == 0 || af == i) && 810 (error = (*rnh->rnh_walktree)(rnh, 811 sysctl_dumpentry, &w))) 812 break; 813 break; 814 815 case NET_RT_IFLIST: 816 error = sysctl_iflist(af, &w); 817 } 818 splx(s); 819 if (w.w_tmem) 820 free(w.w_tmem, M_RTABLE); 821 w.w_needed += w.w_given; 822 if (where) { 823 *given = w.w_where - (caddr_t) where; 824 if (*given < w.w_needed) 825 return (ENOMEM); 826 } else { 827 *given = (11 * w.w_needed) / 10; 828 } 829 return (error); 830 } 831 832 /* 833 * Definitions of protocols supported in the ROUTE domain. 834 */ 835 836 extern struct domain routedomain; /* or at least forward */ 837 838 struct protosw routesw[] = { 839 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 840 raw_input, route_output, raw_ctlinput, 0, 841 route_usrreq, 842 raw_init, 0, 0, 0, 843 sysctl_rtable, 844 } 845 }; 846 847 struct domain routedomain = 848 { PF_ROUTE, "route", route_init, 0, 0, 849 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 850
Indexes created Fri Oct 03 02:09:57 GMT 2025