rtsock.c revision 1.17
1 /* $NetBSD: rtsock.c,v 1.17 1996/02/13 22:00:52 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 * 66 rt_msg1 __P((int, struct rt_addrinfo *)); 67 static int rt_msg2 __P((int, 68 struct rt_addrinfo *, caddr_t, struct walkarg *)); 69 static void rt_xaddrs __P((caddr_t, caddr_t, struct rt_addrinfo *)); 70 71 /* Sleazy use of local variables throughout file, warning!!!! */ 72 #define dst info.rti_info[RTAX_DST] 73 #define gate info.rti_info[RTAX_GATEWAY] 74 #define netmask info.rti_info[RTAX_NETMASK] 75 #define genmask info.rti_info[RTAX_GENMASK] 76 #define ifpaddr info.rti_info[RTAX_IFP] 77 #define ifaaddr info.rti_info[RTAX_IFA] 78 #define brdaddr info.rti_info[RTAX_BRD] 79 80 /*ARGSUSED*/ 81 int 82 route_usrreq(so, req, m, nam, control) 83 register struct socket *so; 84 int req; 85 struct mbuf *m, *nam, *control; 86 { 87 register int error = 0; 88 register struct rawcb *rp = sotorawcb(so); 89 int s; 90 91 if (req == PRU_ATTACH) { 92 MALLOC(rp, struct rawcb *, sizeof(*rp), M_PCB, M_WAITOK); 93 if ((so->so_pcb = rp) != NULL) 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 = splsoftnet(); 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 #if __STDC__ 135 route_output(struct mbuf *m, ...) 136 #else 137 route_output(m, va_alist) 138 struct mbuf *m; 139 va_dcl 140 #endif 141 { 142 register struct rt_msghdr *rtm = 0; 143 register struct rtentry *rt = 0; 144 struct rtentry *saved_nrt = 0; 145 struct radix_node_head *rnh; 146 struct rt_addrinfo info; 147 int len, error = 0; 148 struct ifnet *ifp = 0; 149 struct ifaddr *ifa = 0; 150 struct socket *so; 151 va_list ap; 152 153 va_start(ap, m); 154 so = va_arg(ap, struct socket *); 155 va_end(ap); 156 157 158 #define senderr(e) { error = e; goto flush;} 159 if (m == 0 || ((m->m_len < sizeof(int32_t)) && 160 (m = m_pullup(m, sizeof(int32_t))) == 0)) 161 return (ENOBUFS); 162 if ((m->m_flags & M_PKTHDR) == 0) 163 panic("route_output"); 164 len = m->m_pkthdr.len; 165 if (len < sizeof(*rtm) || 166 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 167 dst = 0; 168 senderr(EINVAL); 169 } 170 R_Malloc(rtm, struct rt_msghdr *, len); 171 if (rtm == 0) { 172 dst = 0; 173 senderr(ENOBUFS); 174 } 175 m_copydata(m, 0, len, (caddr_t)rtm); 176 if (rtm->rtm_version != RTM_VERSION) { 177 dst = 0; 178 senderr(EPROTONOSUPPORT); 179 } 180 rtm->rtm_pid = curproc->p_pid; 181 info.rti_addrs = rtm->rtm_addrs; 182 rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info); 183 if (dst == 0) 184 senderr(EINVAL); 185 if (genmask) { 186 struct radix_node *t; 187 t = rn_addmask((caddr_t)genmask, 0, 1); 188 if (t && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0) 189 genmask = (struct sockaddr *)(t->rn_key); 190 else 191 senderr(ENOBUFS); 192 } 193 switch (rtm->rtm_type) { 194 195 case RTM_ADD: 196 if (gate == 0) 197 senderr(EINVAL); 198 error = rtrequest(RTM_ADD, dst, gate, netmask, 199 rtm->rtm_flags, &saved_nrt); 200 if (error == 0 && saved_nrt) { 201 rt_setmetrics(rtm->rtm_inits, 202 &rtm->rtm_rmx, &saved_nrt->rt_rmx); 203 saved_nrt->rt_refcnt--; 204 saved_nrt->rt_genmask = genmask; 205 } 206 break; 207 208 case RTM_DELETE: 209 error = rtrequest(RTM_DELETE, dst, gate, netmask, 210 rtm->rtm_flags, &saved_nrt); 211 if (error == 0) { 212 (rt = saved_nrt)->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)) != NULL) 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 if ((ifp = rt->rt_ifp) != NULL) { 237 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 238 ifaaddr = rt->rt_ifa->ifa_addr; 239 if (ifp->if_flags & IFF_POINTOPOINT) 240 brdaddr = rt->rt_ifa->ifa_dstaddr; 241 else 242 brdaddr = 0; 243 rtm->rtm_index = ifp->if_index; 244 } else { 245 ifpaddr = 0; 246 ifaaddr = 0; 247 } 248 } 249 len = rt_msg2(rtm->rtm_type, &info, (caddr_t)0, 250 (struct walkarg *)0); 251 if (len > rtm->rtm_msglen) { 252 struct rt_msghdr *new_rtm; 253 R_Malloc(new_rtm, struct rt_msghdr *, len); 254 if (new_rtm == 0) 255 senderr(ENOBUFS); 256 Bcopy(rtm, new_rtm, rtm->rtm_msglen); 257 Free(rtm); rtm = new_rtm; 258 } 259 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, 260 (struct walkarg *)0); 261 rtm->rtm_flags = rt->rt_flags; 262 rtm->rtm_rmx = rt->rt_rmx; 263 rtm->rtm_addrs = info.rti_addrs; 264 break; 265 266 case RTM_CHANGE: 267 if (gate && rt_setgate(rt, rt_key(rt), gate)) 268 senderr(EDQUOT); 269 /* new gateway could require new ifaddr, ifp; 270 flags may also be different; ifp may be specified 271 by ll sockaddr when protocol address is ambiguous */ 272 if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) && 273 (ifp = ifa->ifa_ifp)) 274 ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate, 275 ifp); 276 else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) || 277 (ifa = ifa_ifwithroute(rt->rt_flags, 278 rt_key(rt), gate))) 279 ifp = ifa->ifa_ifp; 280 if (ifa) { 281 register struct ifaddr *oifa = rt->rt_ifa; 282 if (oifa != ifa) { 283 if (oifa && oifa->ifa_rtrequest) 284 oifa->ifa_rtrequest(RTM_DELETE, 285 rt, gate); 286 IFAFREE(rt->rt_ifa); 287 rt->rt_ifa = ifa; 288 ifa->ifa_refcnt++; 289 rt->rt_ifp = ifp; 290 } 291 } 292 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 293 &rt->rt_rmx); 294 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 295 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate); 296 if (genmask) 297 rt->rt_genmask = genmask; 298 /* 299 * Fall into 300 */ 301 case RTM_LOCK: 302 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 303 rt->rt_rmx.rmx_locks |= 304 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 305 break; 306 } 307 break; 308 309 default: 310 senderr(EOPNOTSUPP); 311 } 312 313 flush: 314 if (rtm) { 315 if (error) 316 rtm->rtm_errno = error; 317 else 318 rtm->rtm_flags |= RTF_DONE; 319 } 320 if (rt) 321 rtfree(rt); 322 { 323 register struct rawcb *rp = 0; 324 /* 325 * Check to see if we don't want our own messages. 326 */ 327 if ((so->so_options & SO_USELOOPBACK) == 0) { 328 if (route_cb.any_count <= 1) { 329 if (rtm) 330 Free(rtm); 331 m_freem(m); 332 return (error); 333 } 334 /* There is another listener, so construct message */ 335 rp = sotorawcb(so); 336 } 337 if (rtm) { 338 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 339 Free(rtm); 340 } 341 if (rp) 342 rp->rcb_proto.sp_family = 0; /* Avoid us */ 343 if (dst) 344 route_proto.sp_protocol = dst->sa_family; 345 raw_input(m, &route_proto, &route_src, &route_dst); 346 if (rp) 347 rp->rcb_proto.sp_family = PF_ROUTE; 348 } 349 return (error); 350 } 351 352 void 353 rt_setmetrics(which, in, out) 354 u_long which; 355 register struct rt_metrics *in, *out; 356 { 357 #define metric(f, e) if (which & (f)) out->e = in->e; 358 metric(RTV_RPIPE, rmx_recvpipe); 359 metric(RTV_SPIPE, rmx_sendpipe); 360 metric(RTV_SSTHRESH, rmx_ssthresh); 361 metric(RTV_RTT, rmx_rtt); 362 metric(RTV_RTTVAR, rmx_rttvar); 363 metric(RTV_HOPCOUNT, rmx_hopcount); 364 metric(RTV_MTU, rmx_mtu); 365 metric(RTV_EXPIRE, rmx_expire); 366 #undef metric 367 } 368 369 #define ROUNDUP(a) \ 370 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(int32_t) - 1))) : sizeof(int32_t)) 371 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 372 373 static void 374 rt_xaddrs(cp, cplim, rtinfo) 375 register caddr_t cp, cplim; 376 register struct rt_addrinfo *rtinfo; 377 { 378 register struct sockaddr *sa; 379 register int i; 380 381 bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info)); 382 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 383 if ((rtinfo->rti_addrs & (1 << i)) == 0) 384 continue; 385 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 386 ADVANCE(cp, sa); 387 } 388 } 389 390 /* 391 * Copy data from a buffer back into the indicated mbuf chain, 392 * starting "off" bytes from the beginning, extending the mbuf 393 * chain if necessary. 394 */ 395 void 396 m_copyback(m0, off, len, cp) 397 struct mbuf *m0; 398 register int off; 399 register int len; 400 caddr_t cp; 401 { 402 register int mlen; 403 register struct mbuf *m = m0, *n; 404 int totlen = 0; 405 406 if (m0 == 0) 407 return; 408 while (off > (mlen = m->m_len)) { 409 off -= mlen; 410 totlen += mlen; 411 if (m->m_next == 0) { 412 n = m_getclr(M_DONTWAIT, m->m_type); 413 if (n == 0) 414 goto out; 415 n->m_len = min(MLEN, len + off); 416 m->m_next = n; 417 } 418 m = m->m_next; 419 } 420 while (len > 0) { 421 mlen = min (m->m_len - off, len); 422 bcopy(cp, off + mtod(m, caddr_t), (unsigned)mlen); 423 cp += mlen; 424 len -= mlen; 425 mlen += off; 426 off = 0; 427 totlen += mlen; 428 if (len == 0) 429 break; 430 if (m->m_next == 0) { 431 n = m_get(M_DONTWAIT, m->m_type); 432 if (n == 0) 433 break; 434 n->m_len = min(MLEN, len); 435 m->m_next = n; 436 } 437 m = m->m_next; 438 } 439 out: if (((m = m0)->m_flags & M_PKTHDR) && (m->m_pkthdr.len < totlen)) 440 m->m_pkthdr.len = totlen; 441 } 442 443 static struct mbuf * 444 rt_msg1(type, rtinfo) 445 int type; 446 register struct rt_addrinfo *rtinfo; 447 { 448 register struct rt_msghdr *rtm; 449 register struct mbuf *m; 450 register int i; 451 register struct sockaddr *sa; 452 int len, dlen; 453 454 m = m_gethdr(M_DONTWAIT, MT_DATA); 455 if (m == 0) 456 return (m); 457 switch (type) { 458 459 case RTM_DELADDR: 460 case RTM_NEWADDR: 461 len = sizeof(struct ifa_msghdr); 462 break; 463 464 case RTM_IFINFO: 465 len = sizeof(struct if_msghdr); 466 break; 467 468 default: 469 len = sizeof(struct rt_msghdr); 470 } 471 if (len > MHLEN) 472 panic("rt_msg1"); 473 m->m_pkthdr.len = m->m_len = len; 474 m->m_pkthdr.rcvif = 0; 475 rtm = mtod(m, struct rt_msghdr *); 476 bzero((caddr_t)rtm, len); 477 for (i = 0; i < RTAX_MAX; i++) { 478 if ((sa = rtinfo->rti_info[i]) == NULL) 479 continue; 480 rtinfo->rti_addrs |= (1 << i); 481 dlen = ROUNDUP(sa->sa_len); 482 m_copyback(m, len, dlen, (caddr_t)sa); 483 len += dlen; 484 } 485 if (m->m_pkthdr.len != len) { 486 m_freem(m); 487 return (NULL); 488 } 489 rtm->rtm_msglen = len; 490 rtm->rtm_version = RTM_VERSION; 491 rtm->rtm_type = type; 492 return (m); 493 } 494 495 static int 496 rt_msg2(type, rtinfo, cp, w) 497 int type; 498 register struct rt_addrinfo *rtinfo; 499 caddr_t cp; 500 struct walkarg *w; 501 { 502 register int i; 503 int len, dlen, second_time = 0; 504 caddr_t cp0; 505 506 rtinfo->rti_addrs = 0; 507 again: 508 switch (type) { 509 510 case RTM_DELADDR: 511 case RTM_NEWADDR: 512 len = sizeof(struct ifa_msghdr); 513 break; 514 515 case RTM_IFINFO: 516 len = sizeof(struct if_msghdr); 517 break; 518 519 default: 520 len = sizeof(struct rt_msghdr); 521 } 522 if ((cp0 = cp) != NULL) 523 cp += len; 524 for (i = 0; i < RTAX_MAX; i++) { 525 register struct sockaddr *sa; 526 527 if ((sa = rtinfo->rti_info[i]) == 0) 528 continue; 529 rtinfo->rti_addrs |= (1 << i); 530 dlen = ROUNDUP(sa->sa_len); 531 if (cp) { 532 bcopy((caddr_t)sa, cp, (unsigned)dlen); 533 cp += dlen; 534 } 535 len += dlen; 536 } 537 if (cp == 0 && w != NULL && !second_time) { 538 register struct walkarg *rw = w; 539 540 rw->w_needed += len; 541 if (rw->w_needed <= 0 && rw->w_where) { 542 if (rw->w_tmemsize < len) { 543 if (rw->w_tmem) 544 free(rw->w_tmem, M_RTABLE); 545 rw->w_tmem = (caddr_t) malloc(len, M_RTABLE, 546 M_NOWAIT); 547 if (rw->w_tmem) 548 rw->w_tmemsize = len; 549 } 550 if (rw->w_tmem) { 551 cp = rw->w_tmem; 552 second_time = 1; 553 goto again; 554 } else 555 rw->w_where = 0; 556 } 557 } 558 if (cp) { 559 register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 560 561 rtm->rtm_version = RTM_VERSION; 562 rtm->rtm_type = type; 563 rtm->rtm_msglen = len; 564 } 565 return (len); 566 } 567 568 /* 569 * This routine is called to generate a message from the routing 570 * socket indicating that a redirect has occured, a routing lookup 571 * has failed, or that a protocol has detected timeouts to a particular 572 * destination. 573 */ 574 void 575 rt_missmsg(type, rtinfo, flags, error) 576 int type, flags, error; 577 register struct rt_addrinfo *rtinfo; 578 { 579 register struct rt_msghdr *rtm; 580 register struct mbuf *m; 581 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 582 583 if (route_cb.any_count == 0) 584 return; 585 m = rt_msg1(type, rtinfo); 586 if (m == 0) 587 return; 588 rtm = mtod(m, struct rt_msghdr *); 589 rtm->rtm_flags = RTF_DONE | flags; 590 rtm->rtm_errno = error; 591 rtm->rtm_addrs = rtinfo->rti_addrs; 592 route_proto.sp_protocol = sa ? sa->sa_family : 0; 593 raw_input(m, &route_proto, &route_src, &route_dst); 594 } 595 596 /* 597 * This routine is called to generate a message from the routing 598 * socket indicating that the status of a network interface has changed. 599 */ 600 void 601 rt_ifmsg(ifp) 602 register struct ifnet *ifp; 603 { 604 register struct if_msghdr *ifm; 605 struct mbuf *m; 606 struct rt_addrinfo info; 607 608 if (route_cb.any_count == 0) 609 return; 610 bzero((caddr_t)&info, sizeof(info)); 611 m = rt_msg1(RTM_IFINFO, &info); 612 if (m == 0) 613 return; 614 ifm = mtod(m, struct if_msghdr *); 615 ifm->ifm_index = ifp->if_index; 616 ifm->ifm_flags = ifp->if_flags; 617 ifm->ifm_data = ifp->if_data; 618 ifm->ifm_addrs = 0; 619 route_proto.sp_protocol = 0; 620 raw_input(m, &route_proto, &route_src, &route_dst); 621 } 622 623 /* 624 * This is called to generate messages from the routing socket 625 * indicating a network interface has had addresses associated with it. 626 * if we ever reverse the logic and replace messages TO the routing 627 * socket indicate a request to configure interfaces, then it will 628 * be unnecessary as the routing socket will automatically generate 629 * copies of it. 630 */ 631 void 632 rt_newaddrmsg(cmd, ifa, error, rt) 633 int cmd, error; 634 register struct ifaddr *ifa; 635 register struct rtentry *rt; 636 { 637 struct rt_addrinfo info; 638 struct sockaddr *sa = NULL; 639 int pass; 640 struct mbuf *m = NULL; 641 struct ifnet *ifp = ifa->ifa_ifp; 642 643 if (route_cb.any_count == 0) 644 return; 645 for (pass = 1; pass < 3; pass++) { 646 bzero((caddr_t)&info, sizeof(info)); 647 if ((cmd == RTM_ADD && pass == 1) || 648 (cmd == RTM_DELETE && pass == 2)) { 649 register struct ifa_msghdr *ifam; 650 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 651 652 ifaaddr = sa = ifa->ifa_addr; 653 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 654 netmask = ifa->ifa_netmask; 655 brdaddr = ifa->ifa_dstaddr; 656 if ((m = rt_msg1(ncmd, &info)) == NULL) 657 continue; 658 ifam = mtod(m, struct ifa_msghdr *); 659 ifam->ifam_index = ifp->if_index; 660 ifam->ifam_metric = ifa->ifa_metric; 661 ifam->ifam_flags = ifa->ifa_flags; 662 ifam->ifam_addrs = info.rti_addrs; 663 } 664 if ((cmd == RTM_ADD && pass == 2) || 665 (cmd == RTM_DELETE && pass == 1)) { 666 register struct rt_msghdr *rtm; 667 668 if (rt == 0) 669 continue; 670 netmask = rt_mask(rt); 671 dst = sa = rt_key(rt); 672 gate = rt->rt_gateway; 673 if ((m = rt_msg1(cmd, &info)) == NULL) 674 continue; 675 rtm = mtod(m, struct rt_msghdr *); 676 rtm->rtm_index = ifp->if_index; 677 rtm->rtm_flags |= rt->rt_flags; 678 rtm->rtm_errno = error; 679 rtm->rtm_addrs = info.rti_addrs; 680 } 681 route_proto.sp_protocol = sa ? sa->sa_family : 0; 682 raw_input(m, &route_proto, &route_src, &route_dst); 683 } 684 } 685 686 /* 687 * This is used in dumping the kernel table via sysctl(). 688 */ 689 int 690 sysctl_dumpentry(rn, v) 691 struct radix_node *rn; 692 register void *v; 693 { 694 register struct walkarg *w = v; 695 register struct rtentry *rt = (struct rtentry *)rn; 696 int error = 0, size; 697 struct rt_addrinfo info; 698 699 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 700 return 0; 701 bzero((caddr_t)&info, sizeof(info)); 702 dst = rt_key(rt); 703 gate = rt->rt_gateway; 704 netmask = rt_mask(rt); 705 genmask = rt->rt_genmask; 706 if (rt->rt_ifp) { 707 ifpaddr = rt->rt_ifp->if_addrlist.tqh_first->ifa_addr; 708 ifaaddr = rt->rt_ifa->ifa_addr; 709 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 710 brdaddr = rt->rt_ifa->ifa_dstaddr; 711 } 712 size = rt_msg2(RTM_GET, &info, 0, w); 713 if (w->w_where && w->w_tmem) { 714 register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 715 716 rtm->rtm_flags = rt->rt_flags; 717 rtm->rtm_use = rt->rt_use; 718 rtm->rtm_rmx = rt->rt_rmx; 719 rtm->rtm_index = rt->rt_ifp->if_index; 720 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 721 rtm->rtm_addrs = info.rti_addrs; 722 if ((error = copyout((caddr_t)rtm, w->w_where, size)) != 0) 723 w->w_where = NULL; 724 else 725 w->w_where += size; 726 } 727 return (error); 728 } 729 730 int 731 sysctl_iflist(af, w) 732 int af; 733 register struct walkarg *w; 734 { 735 register struct ifnet *ifp; 736 register struct ifaddr *ifa; 737 struct rt_addrinfo info; 738 int len, error = 0; 739 740 bzero((caddr_t)&info, sizeof(info)); 741 for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) { 742 if (w->w_arg && w->w_arg != ifp->if_index) 743 continue; 744 ifa = ifp->if_addrlist.tqh_first; 745 ifpaddr = ifa->ifa_addr; 746 len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w); 747 ifpaddr = 0; 748 if (w->w_where && w->w_tmem) { 749 register struct if_msghdr *ifm; 750 751 ifm = (struct if_msghdr *)w->w_tmem; 752 ifm->ifm_index = ifp->if_index; 753 ifm->ifm_flags = ifp->if_flags; 754 ifm->ifm_data = ifp->if_data; 755 ifm->ifm_addrs = info.rti_addrs; 756 error = copyout((caddr_t)ifm, w->w_where, len); 757 if (error) 758 return (error); 759 w->w_where += len; 760 } 761 while ((ifa = ifa->ifa_list.tqe_next) != NULL) { 762 if (af && af != ifa->ifa_addr->sa_family) 763 continue; 764 ifaaddr = ifa->ifa_addr; 765 netmask = ifa->ifa_netmask; 766 brdaddr = ifa->ifa_dstaddr; 767 len = rt_msg2(RTM_NEWADDR, &info, 0, w); 768 if (w->w_where && w->w_tmem) { 769 register struct ifa_msghdr *ifam; 770 771 ifam = (struct ifa_msghdr *)w->w_tmem; 772 ifam->ifam_index = ifa->ifa_ifp->if_index; 773 ifam->ifam_flags = ifa->ifa_flags; 774 ifam->ifam_metric = ifa->ifa_metric; 775 ifam->ifam_addrs = info.rti_addrs; 776 error = copyout(w->w_tmem, w->w_where, len); 777 if (error) 778 return (error); 779 w->w_where += len; 780 } 781 } 782 ifaaddr = netmask = brdaddr = 0; 783 } 784 return (0); 785 } 786 787 int 788 sysctl_rtable(name, namelen, where, given, new, newlen) 789 int *name; 790 u_int namelen; 791 void *where; 792 size_t *given; 793 void *new; 794 size_t newlen; 795 { 796 register struct radix_node_head *rnh; 797 int i, s, error = EINVAL; 798 u_char af; 799 struct walkarg w; 800 801 if (new) 802 return (EPERM); 803 if (namelen != 3) 804 return (EINVAL); 805 af = name[0]; 806 Bzero(&w, sizeof(w)); 807 w.w_where = where; 808 w.w_given = *given; 809 w.w_needed = 0 - w.w_given; 810 w.w_op = name[1]; 811 w.w_arg = name[2]; 812 813 s = splsoftnet(); 814 switch (w.w_op) { 815 816 case NET_RT_DUMP: 817 case NET_RT_FLAGS: 818 for (i = 1; i <= AF_MAX; i++) 819 if ((rnh = rt_tables[i]) && (af == 0 || af == i) && 820 (error = (*rnh->rnh_walktree)(rnh, 821 sysctl_dumpentry, 822 &w))) 823 break; 824 break; 825 826 case NET_RT_IFLIST: 827 error = sysctl_iflist(af, &w); 828 } 829 splx(s); 830 if (w.w_tmem) 831 free(w.w_tmem, M_RTABLE); 832 w.w_needed += w.w_given; 833 if (where) { 834 *given = w.w_where - (caddr_t) where; 835 if (*given < w.w_needed) 836 return (ENOMEM); 837 } else { 838 *given = (11 * w.w_needed) / 10; 839 } 840 return (error); 841 } 842 843 /* 844 * Definitions of protocols supported in the ROUTE domain. 845 */ 846 847 extern struct domain routedomain; /* or at least forward */ 848 849 struct protosw routesw[] = { 850 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 851 raw_input, route_output, raw_ctlinput, 0, 852 route_usrreq, 853 raw_init, 0, 0, 0, 854 sysctl_rtable, 855 } 856 }; 857 858 struct domain routedomain = 859 { PF_ROUTE, "route", route_init, 0, 0, 860 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 861
Indexes created Mon Sep 22 21:09:42 GMT 2025