rtsock.c revision 1.23
1 /* $NetBSD: rtsock.c,v 1.23 1997/02/22 03:47:01 thorpej 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)) 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 /* 414 * Copy data from a buffer back into the indicated mbuf chain, 415 * starting "off" bytes from the beginning, extending the mbuf 416 * chain if necessary. 417 */ 418 void 419 m_copyback(m0, off, len, cp) 420 struct mbuf *m0; 421 register int off; 422 register int len; 423 caddr_t cp; 424 { 425 register int mlen; 426 register struct mbuf *m = m0, *n; 427 int totlen = 0; 428 429 if (m0 == 0) 430 return; 431 while (off > (mlen = m->m_len)) { 432 off -= mlen; 433 totlen += mlen; 434 if (m->m_next == 0) { 435 n = m_getclr(M_DONTWAIT, m->m_type); 436 if (n == 0) 437 goto out; 438 n->m_len = min(MLEN, len + off); 439 m->m_next = n; 440 } 441 m = m->m_next; 442 } 443 while (len > 0) { 444 mlen = min (m->m_len - off, len); 445 bcopy(cp, off + mtod(m, caddr_t), (unsigned)mlen); 446 cp += mlen; 447 len -= mlen; 448 mlen += off; 449 off = 0; 450 totlen += mlen; 451 if (len == 0) 452 break; 453 if (m->m_next == 0) { 454 n = m_get(M_DONTWAIT, m->m_type); 455 if (n == 0) 456 break; 457 n->m_len = min(MLEN, len); 458 m->m_next = n; 459 } 460 m = m->m_next; 461 } 462 out: if (((m = m0)->m_flags & M_PKTHDR) && (m->m_pkthdr.len < totlen)) 463 m->m_pkthdr.len = totlen; 464 } 465 466 static struct mbuf * 467 rt_msg1(type, rtinfo) 468 int type; 469 register struct rt_addrinfo *rtinfo; 470 { 471 register struct rt_msghdr *rtm; 472 register struct mbuf *m; 473 register int i; 474 register struct sockaddr *sa; 475 int len, dlen; 476 477 m = m_gethdr(M_DONTWAIT, MT_DATA); 478 if (m == 0) 479 return (m); 480 switch (type) { 481 482 case RTM_DELADDR: 483 case RTM_NEWADDR: 484 len = sizeof(struct ifa_msghdr); 485 break; 486 487 case RTM_IFINFO: 488 len = sizeof(struct if_msghdr); 489 break; 490 491 default: 492 len = sizeof(struct rt_msghdr); 493 } 494 if (len > MHLEN) 495 panic("rt_msg1"); 496 m->m_pkthdr.len = m->m_len = len; 497 m->m_pkthdr.rcvif = 0; 498 rtm = mtod(m, struct rt_msghdr *); 499 bzero(rtm, len); 500 for (i = 0; i < RTAX_MAX; i++) { 501 if ((sa = rtinfo->rti_info[i]) == NULL) 502 continue; 503 rtinfo->rti_addrs |= (1 << i); 504 dlen = ROUNDUP(sa->sa_len); 505 m_copyback(m, len, dlen, (caddr_t)sa); 506 len += dlen; 507 } 508 if (m->m_pkthdr.len != len) { 509 m_freem(m); 510 return (NULL); 511 } 512 rtm->rtm_msglen = len; 513 rtm->rtm_version = RTM_VERSION; 514 rtm->rtm_type = type; 515 return (m); 516 } 517 518 static int 519 rt_msg2(type, rtinfo, cp, w) 520 int type; 521 register struct rt_addrinfo *rtinfo; 522 caddr_t cp; 523 struct walkarg *w; 524 { 525 register int i; 526 int len, dlen, second_time = 0; 527 caddr_t cp0; 528 529 rtinfo->rti_addrs = 0; 530 again: 531 switch (type) { 532 533 case RTM_DELADDR: 534 case RTM_NEWADDR: 535 len = sizeof(struct ifa_msghdr); 536 break; 537 538 case RTM_IFINFO: 539 len = sizeof(struct if_msghdr); 540 break; 541 542 default: 543 len = sizeof(struct rt_msghdr); 544 } 545 if ((cp0 = cp) != NULL) 546 cp += len; 547 for (i = 0; i < RTAX_MAX; i++) { 548 register struct sockaddr *sa; 549 550 if ((sa = rtinfo->rti_info[i]) == 0) 551 continue; 552 rtinfo->rti_addrs |= (1 << i); 553 dlen = ROUNDUP(sa->sa_len); 554 if (cp) { 555 bcopy(sa, cp, (unsigned)dlen); 556 cp += dlen; 557 } 558 len += dlen; 559 } 560 if (cp == 0 && w != NULL && !second_time) { 561 register struct walkarg *rw = w; 562 563 rw->w_needed += len; 564 if (rw->w_needed <= 0 && rw->w_where) { 565 if (rw->w_tmemsize < len) { 566 if (rw->w_tmem) 567 free(rw->w_tmem, M_RTABLE); 568 rw->w_tmem = (caddr_t) malloc(len, M_RTABLE, 569 M_NOWAIT); 570 if (rw->w_tmem) 571 rw->w_tmemsize = len; 572 } 573 if (rw->w_tmem) { 574 cp = rw->w_tmem; 575 second_time = 1; 576 goto again; 577 } else 578 rw->w_where = 0; 579 } 580 } 581 if (cp) { 582 register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 583 584 rtm->rtm_version = RTM_VERSION; 585 rtm->rtm_type = type; 586 rtm->rtm_msglen = len; 587 } 588 return (len); 589 } 590 591 /* 592 * This routine is called to generate a message from the routing 593 * socket indicating that a redirect has occured, a routing lookup 594 * has failed, or that a protocol has detected timeouts to a particular 595 * destination. 596 */ 597 void 598 rt_missmsg(type, rtinfo, flags, error) 599 int type, flags, error; 600 register struct rt_addrinfo *rtinfo; 601 { 602 register struct rt_msghdr *rtm; 603 register struct mbuf *m; 604 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 605 606 if (route_cb.any_count == 0) 607 return; 608 m = rt_msg1(type, rtinfo); 609 if (m == 0) 610 return; 611 rtm = mtod(m, struct rt_msghdr *); 612 rtm->rtm_flags = RTF_DONE | flags; 613 rtm->rtm_errno = error; 614 rtm->rtm_addrs = rtinfo->rti_addrs; 615 route_proto.sp_protocol = sa ? sa->sa_family : 0; 616 raw_input(m, &route_proto, &route_src, &route_dst); 617 } 618 619 /* 620 * This routine is called to generate a message from the routing 621 * socket indicating that the status of a network interface has changed. 622 */ 623 void 624 rt_ifmsg(ifp) 625 register struct ifnet *ifp; 626 { 627 register struct if_msghdr *ifm; 628 struct mbuf *m; 629 struct rt_addrinfo info; 630 631 if (route_cb.any_count == 0) 632 return; 633 bzero(&info, sizeof(info)); 634 m = rt_msg1(RTM_IFINFO, &info); 635 if (m == 0) 636 return; 637 ifm = mtod(m, struct if_msghdr *); 638 ifm->ifm_index = ifp->if_index; 639 ifm->ifm_flags = ifp->if_flags; 640 ifm->ifm_data = ifp->if_data; 641 ifm->ifm_addrs = 0; 642 route_proto.sp_protocol = 0; 643 raw_input(m, &route_proto, &route_src, &route_dst); 644 } 645 646 /* 647 * This is called to generate messages from the routing socket 648 * indicating a network interface has had addresses associated with it. 649 * if we ever reverse the logic and replace messages TO the routing 650 * socket indicate a request to configure interfaces, then it will 651 * be unnecessary as the routing socket will automatically generate 652 * copies of it. 653 */ 654 void 655 rt_newaddrmsg(cmd, ifa, error, rt) 656 int cmd, error; 657 register struct ifaddr *ifa; 658 register struct rtentry *rt; 659 { 660 struct rt_addrinfo info; 661 struct sockaddr *sa = NULL; 662 int pass; 663 struct mbuf *m = NULL; 664 struct ifnet *ifp = ifa->ifa_ifp; 665 666 if (route_cb.any_count == 0) 667 return; 668 for (pass = 1; pass < 3; pass++) { 669 bzero(&info, sizeof(info)); 670 if ((cmd == RTM_ADD && pass == 1) || 671 (cmd == RTM_DELETE && pass == 2)) { 672 register struct ifa_msghdr *ifam; 673 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 674 675 ifaaddr = sa = ifa->ifa_addr; 676 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 677 netmask = ifa->ifa_netmask; 678 brdaddr = ifa->ifa_dstaddr; 679 if ((m = rt_msg1(ncmd, &info)) == NULL) 680 continue; 681 ifam = mtod(m, struct ifa_msghdr *); 682 ifam->ifam_index = ifp->if_index; 683 ifam->ifam_metric = ifa->ifa_metric; 684 ifam->ifam_flags = ifa->ifa_flags; 685 ifam->ifam_addrs = info.rti_addrs; 686 } 687 if ((cmd == RTM_ADD && pass == 2) || 688 (cmd == RTM_DELETE && pass == 1)) { 689 register struct rt_msghdr *rtm; 690 691 if (rt == 0) 692 continue; 693 netmask = rt_mask(rt); 694 dst = sa = rt_key(rt); 695 gate = rt->rt_gateway; 696 if ((m = rt_msg1(cmd, &info)) == NULL) 697 continue; 698 rtm = mtod(m, struct rt_msghdr *); 699 rtm->rtm_index = ifp->if_index; 700 rtm->rtm_flags |= rt->rt_flags; 701 rtm->rtm_errno = error; 702 rtm->rtm_addrs = info.rti_addrs; 703 } 704 route_proto.sp_protocol = sa ? sa->sa_family : 0; 705 raw_input(m, &route_proto, &route_src, &route_dst); 706 } 707 } 708 709 /* 710 * This is used in dumping the kernel table via sysctl(). 711 */ 712 int 713 sysctl_dumpentry(rn, v) 714 struct radix_node *rn; 715 register void *v; 716 { 717 register struct walkarg *w = v; 718 register struct rtentry *rt = (struct rtentry *)rn; 719 int error = 0, size; 720 struct rt_addrinfo info; 721 722 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 723 return 0; 724 bzero(&info, sizeof(info)); 725 dst = rt_key(rt); 726 gate = rt->rt_gateway; 727 netmask = rt_mask(rt); 728 genmask = rt->rt_genmask; 729 if (rt->rt_ifp) { 730 ifpaddr = rt->rt_ifp->if_addrlist.tqh_first->ifa_addr; 731 ifaaddr = rt->rt_ifa->ifa_addr; 732 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 733 brdaddr = rt->rt_ifa->ifa_dstaddr; 734 } 735 size = rt_msg2(RTM_GET, &info, 0, w); 736 if (w->w_where && w->w_tmem) { 737 register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 738 739 rtm->rtm_flags = rt->rt_flags; 740 rtm->rtm_use = rt->rt_use; 741 rtm->rtm_rmx = rt->rt_rmx; 742 rtm->rtm_index = rt->rt_ifp->if_index; 743 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 744 rtm->rtm_addrs = info.rti_addrs; 745 if ((error = copyout(rtm, w->w_where, size)) != 0) 746 w->w_where = NULL; 747 else 748 w->w_where += size; 749 } 750 return (error); 751 } 752 753 int 754 sysctl_iflist(af, w) 755 int af; 756 register struct walkarg *w; 757 { 758 register struct ifnet *ifp; 759 register struct ifaddr *ifa; 760 struct rt_addrinfo info; 761 int len, error = 0; 762 763 bzero(&info, sizeof(info)); 764 for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) { 765 if (w->w_arg && w->w_arg != ifp->if_index) 766 continue; 767 ifa = ifp->if_addrlist.tqh_first; 768 ifpaddr = ifa->ifa_addr; 769 len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w); 770 ifpaddr = 0; 771 if (w->w_where && w->w_tmem) { 772 register struct if_msghdr *ifm; 773 774 ifm = (struct if_msghdr *)w->w_tmem; 775 ifm->ifm_index = ifp->if_index; 776 ifm->ifm_flags = ifp->if_flags; 777 ifm->ifm_data = ifp->if_data; 778 ifm->ifm_addrs = info.rti_addrs; 779 error = copyout(ifm, w->w_where, len); 780 if (error) 781 return (error); 782 w->w_where += len; 783 } 784 while ((ifa = ifa->ifa_list.tqe_next) != NULL) { 785 if (af && af != ifa->ifa_addr->sa_family) 786 continue; 787 ifaaddr = ifa->ifa_addr; 788 netmask = ifa->ifa_netmask; 789 brdaddr = ifa->ifa_dstaddr; 790 len = rt_msg2(RTM_NEWADDR, &info, 0, w); 791 if (w->w_where && w->w_tmem) { 792 register struct ifa_msghdr *ifam; 793 794 ifam = (struct ifa_msghdr *)w->w_tmem; 795 ifam->ifam_index = ifa->ifa_ifp->if_index; 796 ifam->ifam_flags = ifa->ifa_flags; 797 ifam->ifam_metric = ifa->ifa_metric; 798 ifam->ifam_addrs = info.rti_addrs; 799 error = copyout(w->w_tmem, w->w_where, len); 800 if (error) 801 return (error); 802 w->w_where += len; 803 } 804 } 805 ifaaddr = netmask = brdaddr = 0; 806 } 807 return (0); 808 } 809 810 int 811 sysctl_rtable(name, namelen, where, given, new, newlen) 812 int *name; 813 u_int namelen; 814 void *where; 815 size_t *given; 816 void *new; 817 size_t newlen; 818 { 819 register struct radix_node_head *rnh; 820 int i, s, error = EINVAL; 821 u_char af; 822 struct walkarg w; 823 824 if (new) 825 return (EPERM); 826 if (namelen != 3) 827 return (EINVAL); 828 af = name[0]; 829 Bzero(&w, sizeof(w)); 830 w.w_where = where; 831 w.w_given = *given; 832 w.w_needed = 0 - w.w_given; 833 w.w_op = name[1]; 834 w.w_arg = name[2]; 835 836 s = splsoftnet(); 837 switch (w.w_op) { 838 839 case NET_RT_DUMP: 840 case NET_RT_FLAGS: 841 for (i = 1; i <= AF_MAX; i++) 842 if ((rnh = rt_tables[i]) && (af == 0 || af == i) && 843 (error = (*rnh->rnh_walktree)(rnh, 844 sysctl_dumpentry, &w))) 845 break; 846 break; 847 848 case NET_RT_IFLIST: 849 error = sysctl_iflist(af, &w); 850 } 851 splx(s); 852 if (w.w_tmem) 853 free(w.w_tmem, M_RTABLE); 854 w.w_needed += w.w_given; 855 if (where) { 856 *given = w.w_where - (caddr_t) where; 857 if (*given < w.w_needed) 858 return (ENOMEM); 859 } else { 860 *given = (11 * w.w_needed) / 10; 861 } 862 return (error); 863 } 864 865 /* 866 * Definitions of protocols supported in the ROUTE domain. 867 */ 868 869 extern struct domain routedomain; /* or at least forward */ 870 871 struct protosw routesw[] = { 872 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 873 raw_input, route_output, raw_ctlinput, 0, 874 route_usrreq, 875 raw_init, 0, 0, 0, 876 sysctl_rtable, 877 } 878 }; 879 880 struct domain routedomain = 881 { PF_ROUTE, "route", route_init, 0, 0, 882 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 883
Indexes created Fri Oct 03 02:09:57 GMT 2025