rtsock.c revision 1.26
1 /* $NetBSD: rtsock.c,v 1.26 1998/03/01 02:25:05 fvdl 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; 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 = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate, 300 ifp); 301 else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) || 302 (gate && (ifa = ifa_ifwithroute(rt->rt_flags, 303 rt_key(rt), gate)))) 304 ifp = ifa->ifa_ifp; 305 if (ifa) { 306 register struct ifaddr *oifa = rt->rt_ifa; 307 if (oifa != ifa) { 308 if (oifa && oifa->ifa_rtrequest) 309 oifa->ifa_rtrequest(RTM_DELETE, 310 rt, gate); 311 IFAFREE(rt->rt_ifa); 312 rt->rt_ifa = ifa; 313 ifa->ifa_refcnt++; 314 rt->rt_ifp = ifp; 315 } 316 } 317 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 318 &rt->rt_rmx); 319 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 320 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate); 321 if (genmask) 322 rt->rt_genmask = genmask; 323 /* 324 * Fall into 325 */ 326 case RTM_LOCK: 327 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 328 rt->rt_rmx.rmx_locks |= 329 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 330 break; 331 } 332 break; 333 334 default: 335 senderr(EOPNOTSUPP); 336 } 337 338 flush: 339 if (rtm) { 340 if (error) 341 rtm->rtm_errno = error; 342 else 343 rtm->rtm_flags |= RTF_DONE; 344 } 345 if (rt) 346 rtfree(rt); 347 { 348 register struct rawcb *rp = 0; 349 /* 350 * Check to see if we don't want our own messages. 351 */ 352 if ((so->so_options & SO_USELOOPBACK) == 0) { 353 if (route_cb.any_count <= 1) { 354 if (rtm) 355 Free(rtm); 356 m_freem(m); 357 return (error); 358 } 359 /* There is another listener, so construct message */ 360 rp = sotorawcb(so); 361 } 362 if (rtm) { 363 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 364 Free(rtm); 365 } 366 if (rp) 367 rp->rcb_proto.sp_family = 0; /* Avoid us */ 368 if (dst) 369 route_proto.sp_protocol = dst->sa_family; 370 raw_input(m, &route_proto, &route_src, &route_dst); 371 if (rp) 372 rp->rcb_proto.sp_family = PF_ROUTE; 373 } 374 return (error); 375 } 376 377 void 378 rt_setmetrics(which, in, out) 379 u_long which; 380 register struct rt_metrics *in, *out; 381 { 382 #define metric(f, e) if (which & (f)) out->e = in->e; 383 metric(RTV_RPIPE, rmx_recvpipe); 384 metric(RTV_SPIPE, rmx_sendpipe); 385 metric(RTV_SSTHRESH, rmx_ssthresh); 386 metric(RTV_RTT, rmx_rtt); 387 metric(RTV_RTTVAR, rmx_rttvar); 388 metric(RTV_HOPCOUNT, rmx_hopcount); 389 metric(RTV_MTU, rmx_mtu); 390 metric(RTV_EXPIRE, rmx_expire); 391 #undef metric 392 } 393 394 #define ROUNDUP(a) \ 395 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 396 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 397 398 static void 399 rt_xaddrs(cp, cplim, rtinfo) 400 register caddr_t cp, cplim; 401 register struct rt_addrinfo *rtinfo; 402 { 403 register struct sockaddr *sa; 404 register int i; 405 406 bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info)); 407 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 408 if ((rtinfo->rti_addrs & (1 << i)) == 0) 409 continue; 410 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 411 ADVANCE(cp, sa); 412 } 413 } 414 415 static struct mbuf * 416 rt_msg1(type, rtinfo) 417 int type; 418 register struct rt_addrinfo *rtinfo; 419 { 420 register struct rt_msghdr *rtm; 421 register struct mbuf *m; 422 register int i; 423 register struct sockaddr *sa; 424 int len, dlen; 425 426 m = m_gethdr(M_DONTWAIT, MT_DATA); 427 if (m == 0) 428 return (m); 429 switch (type) { 430 431 case RTM_DELADDR: 432 case RTM_NEWADDR: 433 len = sizeof(struct ifa_msghdr); 434 break; 435 436 case RTM_IFINFO: 437 len = sizeof(struct if_msghdr); 438 break; 439 440 default: 441 len = sizeof(struct rt_msghdr); 442 } 443 if (len > MHLEN) 444 panic("rt_msg1"); 445 m->m_pkthdr.len = m->m_len = len; 446 m->m_pkthdr.rcvif = 0; 447 rtm = mtod(m, struct rt_msghdr *); 448 bzero(rtm, len); 449 for (i = 0; i < RTAX_MAX; i++) { 450 if ((sa = rtinfo->rti_info[i]) == NULL) 451 continue; 452 rtinfo->rti_addrs |= (1 << i); 453 dlen = ROUNDUP(sa->sa_len); 454 m_copyback(m, len, dlen, (caddr_t)sa); 455 len += dlen; 456 } 457 if (m->m_pkthdr.len != len) { 458 m_freem(m); 459 return (NULL); 460 } 461 rtm->rtm_msglen = len; 462 rtm->rtm_version = RTM_VERSION; 463 rtm->rtm_type = type; 464 return (m); 465 } 466 467 static int 468 rt_msg2(type, rtinfo, cp, w) 469 int type; 470 register struct rt_addrinfo *rtinfo; 471 caddr_t cp; 472 struct walkarg *w; 473 { 474 register int i; 475 int len, dlen, second_time = 0; 476 caddr_t cp0; 477 478 rtinfo->rti_addrs = 0; 479 again: 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 ((cp0 = cp) != NULL) 495 cp += len; 496 for (i = 0; i < RTAX_MAX; i++) { 497 register struct sockaddr *sa; 498 499 if ((sa = rtinfo->rti_info[i]) == 0) 500 continue; 501 rtinfo->rti_addrs |= (1 << i); 502 dlen = ROUNDUP(sa->sa_len); 503 if (cp) { 504 bcopy(sa, cp, (unsigned)dlen); 505 cp += dlen; 506 } 507 len += dlen; 508 } 509 if (cp == 0 && w != NULL && !second_time) { 510 register struct walkarg *rw = w; 511 512 rw->w_needed += len; 513 if (rw->w_needed <= 0 && rw->w_where) { 514 if (rw->w_tmemsize < len) { 515 if (rw->w_tmem) 516 free(rw->w_tmem, M_RTABLE); 517 rw->w_tmem = (caddr_t) malloc(len, M_RTABLE, 518 M_NOWAIT); 519 if (rw->w_tmem) 520 rw->w_tmemsize = len; 521 } 522 if (rw->w_tmem) { 523 cp = rw->w_tmem; 524 second_time = 1; 525 goto again; 526 } else 527 rw->w_where = 0; 528 } 529 } 530 if (cp) { 531 register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 532 533 rtm->rtm_version = RTM_VERSION; 534 rtm->rtm_type = type; 535 rtm->rtm_msglen = len; 536 } 537 return (len); 538 } 539 540 /* 541 * This routine is called to generate a message from the routing 542 * socket indicating that a redirect has occured, a routing lookup 543 * has failed, or that a protocol has detected timeouts to a particular 544 * destination. 545 */ 546 void 547 rt_missmsg(type, rtinfo, flags, error) 548 int type, flags, error; 549 register struct rt_addrinfo *rtinfo; 550 { 551 register struct rt_msghdr *rtm; 552 register struct mbuf *m; 553 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 554 555 if (route_cb.any_count == 0) 556 return; 557 m = rt_msg1(type, rtinfo); 558 if (m == 0) 559 return; 560 rtm = mtod(m, struct rt_msghdr *); 561 rtm->rtm_flags = RTF_DONE | flags; 562 rtm->rtm_errno = error; 563 rtm->rtm_addrs = rtinfo->rti_addrs; 564 route_proto.sp_protocol = sa ? sa->sa_family : 0; 565 raw_input(m, &route_proto, &route_src, &route_dst); 566 } 567 568 /* 569 * This routine is called to generate a message from the routing 570 * socket indicating that the status of a network interface has changed. 571 */ 572 void 573 rt_ifmsg(ifp) 574 register struct ifnet *ifp; 575 { 576 register struct if_msghdr *ifm; 577 struct mbuf *m; 578 struct rt_addrinfo info; 579 580 if (route_cb.any_count == 0) 581 return; 582 bzero(&info, sizeof(info)); 583 m = rt_msg1(RTM_IFINFO, &info); 584 if (m == 0) 585 return; 586 ifm = mtod(m, struct if_msghdr *); 587 ifm->ifm_index = ifp->if_index; 588 ifm->ifm_flags = ifp->if_flags; 589 ifm->ifm_data = ifp->if_data; 590 ifm->ifm_addrs = 0; 591 route_proto.sp_protocol = 0; 592 raw_input(m, &route_proto, &route_src, &route_dst); 593 } 594 595 /* 596 * This is called to generate messages from the routing socket 597 * indicating a network interface has had addresses associated with it. 598 * if we ever reverse the logic and replace messages TO the routing 599 * socket indicate a request to configure interfaces, then it will 600 * be unnecessary as the routing socket will automatically generate 601 * copies of it. 602 */ 603 void 604 rt_newaddrmsg(cmd, ifa, error, rt) 605 int cmd, error; 606 register struct ifaddr *ifa; 607 register struct rtentry *rt; 608 { 609 struct rt_addrinfo info; 610 struct sockaddr *sa = NULL; 611 int pass; 612 struct mbuf *m = NULL; 613 struct ifnet *ifp = ifa->ifa_ifp; 614 615 if (route_cb.any_count == 0) 616 return; 617 for (pass = 1; pass < 3; pass++) { 618 bzero(&info, sizeof(info)); 619 if ((cmd == RTM_ADD && pass == 1) || 620 (cmd == RTM_DELETE && pass == 2)) { 621 register struct ifa_msghdr *ifam; 622 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 623 624 ifaaddr = sa = ifa->ifa_addr; 625 ifpaddr = ifp->if_addrlist.tqh_first->ifa_addr; 626 netmask = ifa->ifa_netmask; 627 brdaddr = ifa->ifa_dstaddr; 628 if ((m = rt_msg1(ncmd, &info)) == NULL) 629 continue; 630 ifam = mtod(m, struct ifa_msghdr *); 631 ifam->ifam_index = ifp->if_index; 632 ifam->ifam_metric = ifa->ifa_metric; 633 ifam->ifam_flags = ifa->ifa_flags; 634 ifam->ifam_addrs = info.rti_addrs; 635 } 636 if ((cmd == RTM_ADD && pass == 2) || 637 (cmd == RTM_DELETE && pass == 1)) { 638 register struct rt_msghdr *rtm; 639 640 if (rt == 0) 641 continue; 642 netmask = rt_mask(rt); 643 dst = sa = rt_key(rt); 644 gate = rt->rt_gateway; 645 if ((m = rt_msg1(cmd, &info)) == NULL) 646 continue; 647 rtm = mtod(m, struct rt_msghdr *); 648 rtm->rtm_index = ifp->if_index; 649 rtm->rtm_flags |= rt->rt_flags; 650 rtm->rtm_errno = error; 651 rtm->rtm_addrs = info.rti_addrs; 652 } 653 route_proto.sp_protocol = sa ? sa->sa_family : 0; 654 raw_input(m, &route_proto, &route_src, &route_dst); 655 } 656 } 657 658 /* 659 * This is used in dumping the kernel table via sysctl(). 660 */ 661 int 662 sysctl_dumpentry(rn, v) 663 struct radix_node *rn; 664 register void *v; 665 { 666 register struct walkarg *w = v; 667 register struct rtentry *rt = (struct rtentry *)rn; 668 int error = 0, size; 669 struct rt_addrinfo info; 670 671 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 672 return 0; 673 bzero(&info, sizeof(info)); 674 dst = rt_key(rt); 675 gate = rt->rt_gateway; 676 netmask = rt_mask(rt); 677 genmask = rt->rt_genmask; 678 if (rt->rt_ifp) { 679 ifpaddr = rt->rt_ifp->if_addrlist.tqh_first->ifa_addr; 680 ifaaddr = rt->rt_ifa->ifa_addr; 681 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 682 brdaddr = rt->rt_ifa->ifa_dstaddr; 683 } 684 size = rt_msg2(RTM_GET, &info, 0, w); 685 if (w->w_where && w->w_tmem) { 686 register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 687 688 rtm->rtm_flags = rt->rt_flags; 689 rtm->rtm_use = rt->rt_use; 690 rtm->rtm_rmx = rt->rt_rmx; 691 rtm->rtm_index = rt->rt_ifp->if_index; 692 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 693 rtm->rtm_addrs = info.rti_addrs; 694 if ((error = copyout(rtm, w->w_where, size)) != 0) 695 w->w_where = NULL; 696 else 697 w->w_where += size; 698 } 699 return (error); 700 } 701 702 int 703 sysctl_iflist(af, w) 704 int af; 705 register struct walkarg *w; 706 { 707 register struct ifnet *ifp; 708 register struct ifaddr *ifa; 709 struct rt_addrinfo info; 710 int len, error = 0; 711 712 bzero(&info, sizeof(info)); 713 for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) { 714 if (w->w_arg && w->w_arg != ifp->if_index) 715 continue; 716 ifa = ifp->if_addrlist.tqh_first; 717 ifpaddr = ifa->ifa_addr; 718 len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w); 719 ifpaddr = 0; 720 if (w->w_where && w->w_tmem) { 721 register struct if_msghdr *ifm; 722 723 ifm = (struct if_msghdr *)w->w_tmem; 724 ifm->ifm_index = ifp->if_index; 725 ifm->ifm_flags = ifp->if_flags; 726 ifm->ifm_data = ifp->if_data; 727 ifm->ifm_addrs = info.rti_addrs; 728 error = copyout(ifm, w->w_where, len); 729 if (error) 730 return (error); 731 w->w_where += len; 732 } 733 while ((ifa = ifa->ifa_list.tqe_next) != NULL) { 734 if (af && af != ifa->ifa_addr->sa_family) 735 continue; 736 ifaaddr = ifa->ifa_addr; 737 netmask = ifa->ifa_netmask; 738 brdaddr = ifa->ifa_dstaddr; 739 len = rt_msg2(RTM_NEWADDR, &info, 0, w); 740 if (w->w_where && w->w_tmem) { 741 register struct ifa_msghdr *ifam; 742 743 ifam = (struct ifa_msghdr *)w->w_tmem; 744 ifam->ifam_index = ifa->ifa_ifp->if_index; 745 ifam->ifam_flags = ifa->ifa_flags; 746 ifam->ifam_metric = ifa->ifa_metric; 747 ifam->ifam_addrs = info.rti_addrs; 748 error = copyout(w->w_tmem, w->w_where, len); 749 if (error) 750 return (error); 751 w->w_where += len; 752 } 753 } 754 ifaaddr = netmask = brdaddr = 0; 755 } 756 return (0); 757 } 758 759 int 760 sysctl_rtable(name, namelen, where, given, new, newlen) 761 int *name; 762 u_int namelen; 763 void *where; 764 size_t *given; 765 void *new; 766 size_t newlen; 767 { 768 register struct radix_node_head *rnh; 769 int i, s, error = EINVAL; 770 u_char af; 771 struct walkarg w; 772 773 if (new) 774 return (EPERM); 775 if (namelen != 3) 776 return (EINVAL); 777 af = name[0]; 778 Bzero(&w, sizeof(w)); 779 w.w_where = where; 780 w.w_given = *given; 781 w.w_needed = 0 - w.w_given; 782 w.w_op = name[1]; 783 w.w_arg = name[2]; 784 785 s = splsoftnet(); 786 switch (w.w_op) { 787 788 case NET_RT_DUMP: 789 case NET_RT_FLAGS: 790 for (i = 1; i <= AF_MAX; i++) 791 if ((rnh = rt_tables[i]) && (af == 0 || af == i) && 792 (error = (*rnh->rnh_walktree)(rnh, 793 sysctl_dumpentry, &w))) 794 break; 795 break; 796 797 case NET_RT_IFLIST: 798 error = sysctl_iflist(af, &w); 799 } 800 splx(s); 801 if (w.w_tmem) 802 free(w.w_tmem, M_RTABLE); 803 w.w_needed += w.w_given; 804 if (where) { 805 *given = w.w_where - (caddr_t) where; 806 if (*given < w.w_needed) 807 return (ENOMEM); 808 } else { 809 *given = (11 * w.w_needed) / 10; 810 } 811 return (error); 812 } 813 814 /* 815 * Definitions of protocols supported in the ROUTE domain. 816 */ 817 818 extern struct domain routedomain; /* or at least forward */ 819 820 struct protosw routesw[] = { 821 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 822 raw_input, route_output, raw_ctlinput, 0, 823 route_usrreq, 824 raw_init, 0, 0, 0, 825 sysctl_rtable, 826 } 827 }; 828 829 struct domain routedomain = 830 { PF_ROUTE, "route", route_init, 0, 0, 831 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 832
Indexes created Fri Oct 03 02:09:57 GMT 2025