1 /* 2 * Copyright (c) 1988, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)rtsock.c 8.2 (Berkeley) 11/15/93 8 */ 9 10 #include <sys/param.h> 11 #include <sys/systm.h> 12 #include <sys/proc.h> 13 #include <sys/mbuf.h> 14 #include <sys/socket.h> 15 #include <sys/socketvar.h> 16 #include <sys/domain.h> 17 #include <sys/protosw.h> 18 19 #include <net/if.h> 20 #include <net/route.h> 21 #include <net/raw_cb.h> 22 23 struct sockaddr route_dst = { 2, PF_ROUTE, }; 24 struct sockaddr route_src = { 2, PF_ROUTE, }; 25 struct sockproto route_proto = { PF_ROUTE, }; 26 27 struct walkarg { 28 int w_op, w_arg, w_given, w_needed, w_tmemsize; 29 caddr_t w_where, w_tmem; 30 }; 31 32 static struct mbuf * 33 rt_msg1 __P((int, struct rt_addrinfo *)); 34 static int rt_msg2 __P((int, 35 struct rt_addrinfo *, caddr_t, struct walkarg *)); 36 static void rt_xaddrs __P((caddr_t, caddr_t, struct rt_addrinfo *)); 37 38 /* Sleazy use of local variables throughout file, warning!!!! */ 39 #define dst info.rti_info[RTAX_DST] 40 #define gate info.rti_info[RTAX_GATEWAY] 41 #define netmask info.rti_info[RTAX_NETMASK] 42 #define genmask info.rti_info[RTAX_GENMASK] 43 #define ifpaddr info.rti_info[RTAX_IFP] 44 #define ifaaddr info.rti_info[RTAX_IFA] 45 #define brdaddr info.rti_info[RTAX_BRD] 46 47 /*ARGSUSED*/ 48 int 49 route_usrreq(so, req, m, nam, control) 50 register struct socket *so; 51 int req; 52 struct mbuf *m, *nam, *control; 53 { 54 register int error = 0; 55 register struct rawcb *rp = sotorawcb(so); 56 int s; 57 if (req == PRU_ATTACH) { 58 MALLOC(rp, struct rawcb *, sizeof(*rp), M_PCB, M_WAITOK); 59 if (so->so_pcb = (caddr_t)rp) 60 bzero(so->so_pcb, sizeof(*rp)); 61 62 } 63 if (req == PRU_DETACH && rp) { 64 int af = rp->rcb_proto.sp_protocol; 65 if (af == AF_INET) 66 route_cb.ip_count--; 67 else if (af == AF_NS) 68 route_cb.ns_count--; 69 else if (af == AF_ISO) 70 route_cb.iso_count--; 71 route_cb.any_count--; 72 } 73 s = splnet(); 74 error = raw_usrreq(so, req, m, nam, control); 75 rp = sotorawcb(so); 76 if (req == PRU_ATTACH && rp) { 77 int af = rp->rcb_proto.sp_protocol; 78 if (error) { 79 free((caddr_t)rp, M_PCB); 80 splx(s); 81 return (error); 82 } 83 if (af == AF_INET) 84 route_cb.ip_count++; 85 else if (af == AF_NS) 86 route_cb.ns_count++; 87 else if (af == AF_ISO) 88 route_cb.iso_count++; 89 rp->rcb_faddr = &route_src; 90 route_cb.any_count++; 91 soisconnected(so); 92 so->so_options |= SO_USELOOPBACK; 93 } 94 splx(s); 95 return (error); 96 } 97 98 /*ARGSUSED*/ 99 int 100 route_output(m, so) 101 register struct mbuf *m; 102 struct socket *so; 103 { 104 register struct rt_msghdr *rtm = 0; 105 register struct rtentry *rt = 0; 106 struct rtentry *saved_nrt = 0; 107 struct rt_addrinfo info; 108 int len, error = 0; 109 struct ifnet *ifp = 0; 110 struct ifaddr *ifa = 0; 111 112 #define senderr(e) { error = e; goto flush;} 113 if (m == 0 || ((m->m_len < sizeof(long)) && 114 (m = m_pullup(m, sizeof(long))) == 0)) 115 return (ENOBUFS); 116 if ((m->m_flags & M_PKTHDR) == 0) 117 panic("route_output"); 118 len = m->m_pkthdr.len; 119 if (len < sizeof(*rtm) || 120 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 121 dst = 0; 122 senderr(EINVAL); 123 } 124 R_Malloc(rtm, struct rt_msghdr *, len); 125 if (rtm == 0) { 126 dst = 0; 127 senderr(ENOBUFS); 128 } 129 m_copydata(m, 0, len, (caddr_t)rtm); 130 if (rtm->rtm_version != RTM_VERSION) { 131 dst = 0; 132 senderr(EPROTONOSUPPORT); 133 } 134 rtm->rtm_pid = curproc->p_pid; 135 info.rti_addrs = rtm->rtm_addrs; 136 rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info); 137 if (dst == 0) 138 senderr(EINVAL); 139 if (genmask) { 140 struct radix_node *t; 141 t = rn_addmask((caddr_t)genmask, 1, 2); 142 if (t && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0) 143 genmask = (struct sockaddr *)(t->rn_key); 144 else 145 senderr(ENOBUFS); 146 } 147 switch (rtm->rtm_type) { 148 149 case RTM_ADD: 150 if (gate == 0) 151 senderr(EINVAL); 152 error = rtrequest(RTM_ADD, dst, gate, netmask, 153 rtm->rtm_flags, &saved_nrt); 154 if (error == 0 && saved_nrt) { 155 rt_setmetrics(rtm->rtm_inits, 156 &rtm->rtm_rmx, &saved_nrt->rt_rmx); 157 saved_nrt->rt_refcnt--; 158 saved_nrt->rt_genmask = genmask; 159 } 160 break; 161 162 case RTM_DELETE: 163 error = rtrequest(RTM_DELETE, dst, gate, netmask, 164 rtm->rtm_flags, (struct rtentry **)0); 165 break; 166 167 case RTM_GET: 168 case RTM_CHANGE: 169 case RTM_LOCK: 170 rt = rtalloc1(dst, 0); 171 if (rt == 0) 172 senderr(ESRCH); 173 if (rtm->rtm_type != RTM_GET) {/* XXX: too grotty */ 174 struct radix_node *rn; 175 extern struct radix_node_head *mask_rnhead; 176 177 if (Bcmp(dst, rt_key(rt), dst->sa_len) != 0) 178 senderr(ESRCH); 179 if (netmask && (rn = rn_search(netmask, 180 mask_rnhead->rnh_treetop))) 181 netmask = (struct sockaddr *)rn->rn_key; 182 for (rn = rt->rt_nodes; rn; rn = rn->rn_dupedkey) 183 if (netmask == (struct sockaddr *)rn->rn_mask) 184 break; 185 if (rn == 0) 186 senderr(ETOOMANYREFS); 187 rt = (struct rtentry *)rn; 188 } 189 switch(rtm->rtm_type) { 190 191 case RTM_GET: 192 dst = rt_key(rt); 193 gate = rt->rt_gateway; 194 netmask = rt_mask(rt); 195 genmask = rt->rt_genmask; 196 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 197 if (ifp = rt->rt_ifp) { 198 ifpaddr = ifp->if_addrlist->ifa_addr; 199 ifaaddr = rt->rt_ifa->ifa_addr; 200 rtm->rtm_index = ifp->if_index; 201 } else { 202 ifpaddr = 0; 203 ifaaddr = 0; 204 } 205 } 206 len = rt_msg2(RTM_GET, &info, (caddr_t)0, 207 (struct walkarg *)0); 208 if (len > rtm->rtm_msglen) { 209 struct rt_msghdr *new_rtm; 210 R_Malloc(new_rtm, struct rt_msghdr *, len); 211 if (new_rtm == 0) 212 senderr(ENOBUFS); 213 Bcopy(rtm, new_rtm, rtm->rtm_msglen); 214 Free(rtm); rtm = new_rtm; 215 } 216 (void)rt_msg2(RTM_GET, &info, (caddr_t)rtm, 217 (struct walkarg *)0); 218 rtm->rtm_flags = rt->rt_flags; 219 rtm->rtm_rmx = rt->rt_rmx; 220 rtm->rtm_addrs = info.rti_addrs; 221 break; 222 223 case RTM_CHANGE: 224 if (gate && rt_setgate(rt, rt_key(rt), gate)) 225 senderr(EDQUOT); 226 /* new gateway could require new ifaddr, ifp; 227 flags may also be different; ifp may be specified 228 by ll sockaddr when protocol address is ambiguous */ 229 if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) && 230 (ifp = ifa->ifa_ifp)) 231 ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate, 232 ifp); 233 else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) || 234 (ifa = ifa_ifwithroute(rt->rt_flags, 235 rt_key(rt), gate))) 236 ifp = ifa->ifa_ifp; 237 if (ifa) { 238 register struct ifaddr *oifa = rt->rt_ifa; 239 if (oifa != ifa) { 240 if (oifa && oifa->ifa_rtrequest) 241 oifa->ifa_rtrequest(RTM_DELETE, 242 rt, gate); 243 IFAFREE(rt->rt_ifa); 244 rt->rt_ifa = ifa; 245 ifa->ifa_refcnt++; 246 rt->rt_ifp = ifp; 247 } 248 } 249 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 250 &rt->rt_rmx); 251 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 252 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate); 253 if (genmask) 254 rt->rt_genmask = genmask; 255 /* 256 * Fall into 257 */ 258 case RTM_LOCK: 259 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 260 rt->rt_rmx.rmx_locks |= 261 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 262 break; 263 } 264 break; 265 266 default: 267 senderr(EOPNOTSUPP); 268 } 269 270 flush: 271 if (rtm) { 272 if (error) 273 rtm->rtm_errno = error; 274 else 275 rtm->rtm_flags |= RTF_DONE; 276 } 277 cleanup: 278 if (rt) 279 rtfree(rt); 280 { 281 register struct rawcb *rp = 0; 282 /* 283 * Check to see if we don't want our own messages. 284 */ 285 if ((so->so_options & SO_USELOOPBACK) == 0) { 286 if (route_cb.any_count <= 1) { 287 if (rtm) 288 Free(rtm); 289 m_freem(m); 290 return (error); 291 } 292 /* There is another listener, so construct message */ 293 rp = sotorawcb(so); 294 } 295 if (rtm) { 296 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 297 Free(rtm); 298 } 299 if (rp) 300 rp->rcb_proto.sp_family = 0; /* Avoid us */ 301 if (dst) 302 route_proto.sp_protocol = dst->sa_family; 303 raw_input(m, &route_proto, &route_src, &route_dst); 304 if (rp) 305 rp->rcb_proto.sp_family = PF_ROUTE; 306 } 307 return (error); 308 } 309 310 void 311 rt_setmetrics(which, in, out) 312 u_long which; 313 register struct rt_metrics *in, *out; 314 { 315 #define metric(f, e) if (which & (f)) out->e = in->e; 316 metric(RTV_RPIPE, rmx_recvpipe); 317 metric(RTV_SPIPE, rmx_sendpipe); 318 metric(RTV_SSTHRESH, rmx_ssthresh); 319 metric(RTV_RTT, rmx_rtt); 320 metric(RTV_RTTVAR, rmx_rttvar); 321 metric(RTV_HOPCOUNT, rmx_hopcount); 322 metric(RTV_MTU, rmx_mtu); 323 metric(RTV_EXPIRE, rmx_expire); 324 #undef metric 325 } 326 327 #define ROUNDUP(a) \ 328 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 329 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 330 331 static void 332 rt_xaddrs(cp, cplim, rtinfo) 333 register caddr_t cp, cplim; 334 register struct rt_addrinfo *rtinfo; 335 { 336 register struct sockaddr *sa; 337 register int i; 338 339 bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info)); 340 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 341 if ((rtinfo->rti_addrs & (1 << i)) == 0) 342 continue; 343 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 344 ADVANCE(cp, sa); 345 } 346 } 347 348 /* 349 * Copy data from a buffer back into the indicated mbuf chain, 350 * starting "off" bytes from the beginning, extending the mbuf 351 * chain if necessary. 352 */ 353 void 354 m_copyback(m0, off, len, cp) 355 struct mbuf *m0; 356 register int off; 357 register int len; 358 caddr_t cp; 359 { 360 register int mlen; 361 register struct mbuf *m = m0, *n; 362 int totlen = 0; 363 364 if (m0 == 0) 365 return; 366 while (off > (mlen = m->m_len)) { 367 off -= mlen; 368 totlen += mlen; 369 if (m->m_next == 0) { 370 n = m_getclr(M_DONTWAIT, m->m_type); 371 if (n == 0) 372 goto out; 373 n->m_len = min(MLEN, len + off); 374 m->m_next = n; 375 } 376 m = m->m_next; 377 } 378 while (len > 0) { 379 mlen = min (m->m_len - off, len); 380 bcopy(cp, off + mtod(m, caddr_t), (unsigned)mlen); 381 cp += mlen; 382 len -= mlen; 383 mlen += off; 384 off = 0; 385 totlen += mlen; 386 if (len == 0) 387 break; 388 if (m->m_next == 0) { 389 n = m_get(M_DONTWAIT, m->m_type); 390 if (n == 0) 391 break; 392 n->m_len = min(MLEN, len); 393 m->m_next = n; 394 } 395 m = m->m_next; 396 } 397 out: if (((m = m0)->m_flags & M_PKTHDR) && (m->m_pkthdr.len < totlen)) 398 m->m_pkthdr.len = totlen; 399 } 400 401 static struct mbuf * 402 rt_msg1(type, rtinfo) 403 int type; 404 register struct rt_addrinfo *rtinfo; 405 { 406 register struct rt_msghdr *rtm; 407 register struct mbuf *m; 408 register int i; 409 register struct sockaddr *sa; 410 int len, dlen; 411 412 m = m_gethdr(M_DONTWAIT, MT_DATA); 413 if (m == 0) 414 return (m); 415 switch (type) { 416 417 case RTM_DELADDR: 418 case RTM_NEWADDR: 419 len = sizeof(struct ifa_msghdr); 420 break; 421 422 case RTM_IFINFO: 423 len = sizeof(struct if_msghdr); 424 break; 425 426 default: 427 len = sizeof(struct rt_msghdr); 428 } 429 if (len > MHLEN) 430 panic("rt_msg1"); 431 m->m_pkthdr.len = m->m_len = len; 432 m->m_pkthdr.rcvif = 0; 433 rtm = mtod(m, struct rt_msghdr *); 434 bzero((caddr_t)rtm, len); 435 for (i = 0; i < RTAX_MAX; i++) { 436 if ((sa = rtinfo->rti_info[i]) == NULL) 437 continue; 438 rtinfo->rti_addrs |= (1 << i); 439 dlen = ROUNDUP(sa->sa_len); 440 m_copyback(m, len, dlen, (caddr_t)sa); 441 len += dlen; 442 } 443 if (m->m_pkthdr.len != len) { 444 m_freem(m); 445 return (NULL); 446 } 447 rtm->rtm_msglen = len; 448 rtm->rtm_version = RTM_VERSION; 449 rtm->rtm_type = type; 450 return (m); 451 } 452 453 static int 454 rt_msg2(type, rtinfo, cp, w) 455 int type; 456 register struct rt_addrinfo *rtinfo; 457 caddr_t cp; 458 struct walkarg *w; 459 { 460 register int i; 461 int len, dlen, second_time = 0; 462 caddr_t cp0; 463 464 rtinfo->rti_addrs = 0; 465 again: 466 switch (type) { 467 468 case RTM_DELADDR: 469 case RTM_NEWADDR: 470 len = sizeof(struct ifa_msghdr); 471 break; 472 473 case RTM_IFINFO: 474 len = sizeof(struct if_msghdr); 475 break; 476 477 default: 478 len = sizeof(struct rt_msghdr); 479 } 480 if (cp0 = cp) 481 cp += len; 482 for (i = 0; i < RTAX_MAX; i++) { 483 register struct sockaddr *sa; 484 485 if ((sa = rtinfo->rti_info[i]) == 0) 486 continue; 487 rtinfo->rti_addrs |= (1 << i); 488 dlen = ROUNDUP(sa->sa_len); 489 if (cp) { 490 bcopy((caddr_t)sa, cp, (unsigned)dlen); 491 cp += dlen; 492 } 493 len += dlen; 494 } 495 if (cp == 0 && w != NULL && !second_time) { 496 register struct walkarg *rw = w; 497 498 rw->w_needed += len; 499 if (rw->w_needed <= 0 && rw->w_where) { 500 if (rw->w_tmemsize < len) { 501 if (rw->w_tmem) 502 free(rw->w_tmem, M_RTABLE); 503 if (rw->w_tmem = (caddr_t) 504 malloc(len, M_RTABLE, M_NOWAIT)) 505 rw->w_tmemsize = len; 506 } 507 if (rw->w_tmem) { 508 cp = rw->w_tmem; 509 second_time = 1; 510 goto again; 511 } else 512 rw->w_where = 0; 513 } 514 } 515 if (cp) { 516 register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 517 518 rtm->rtm_version = RTM_VERSION; 519 rtm->rtm_type = type; 520 rtm->rtm_msglen = len; 521 } 522 return (len); 523 } 524 525 /* 526 * This routine is called to generate a message from the routing 527 * socket indicating that a redirect has occured, a routing lookup 528 * has failed, or that a protocol has detected timeouts to a particular 529 * destination. 530 */ 531 void 532 rt_missmsg(type, rtinfo, flags, error) 533 int type, flags, error; 534 register struct rt_addrinfo *rtinfo; 535 { 536 register struct rt_msghdr *rtm; 537 register struct mbuf *m; 538 register int i; 539 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 540 541 if (route_cb.any_count == 0) 542 return; 543 m = rt_msg1(type, rtinfo); 544 if (m == 0) 545 return; 546 rtm = mtod(m, struct rt_msghdr *); 547 rtm->rtm_flags = RTF_DONE | flags; 548 rtm->rtm_errno = error; 549 rtm->rtm_addrs = rtinfo->rti_addrs; 550 route_proto.sp_protocol = sa ? sa->sa_family : 0; 551 raw_input(m, &route_proto, &route_src, &route_dst); 552 } 553 554 /* 555 * This routine is called to generate a message from the routing 556 * socket indicating that the status of a network interface has changed. 557 */ 558 void 559 rt_ifmsg(ifp) 560 register struct ifnet *ifp; 561 { 562 register struct if_msghdr *ifm; 563 struct mbuf *m; 564 struct rt_addrinfo info; 565 566 if (route_cb.any_count == 0) 567 return; 568 bzero((caddr_t)&info, sizeof(info)); 569 m = rt_msg1(RTM_IFINFO, &info); 570 if (m == 0) 571 return; 572 ifm = mtod(m, struct if_msghdr *); 573 ifm->ifm_index = ifp->if_index; 574 ifm->ifm_flags = ifp->if_flags; 575 ifm->ifm_data = ifp->if_data; 576 ifm->ifm_addrs = 0; 577 route_proto.sp_protocol = 0; 578 raw_input(m, &route_proto, &route_src, &route_dst); 579 } 580 581 /* 582 * This is called to generate messages from the routing socket 583 * indicating a network interface has had addresses associated with it. 584 * if we ever reverse the logic and replace messages TO the routing 585 * socket indicate a request to configure interfaces, then it will 586 * be unnecessary as the routing socket will automatically generate 587 * copies of it. 588 */ 589 void 590 rt_newaddrmsg(cmd, ifa, error, rt) 591 int cmd, error; 592 register struct ifaddr *ifa; 593 register struct rtentry *rt; 594 { 595 struct rt_addrinfo info; 596 struct sockaddr *sa; 597 int pass; 598 struct mbuf *m; 599 struct ifnet *ifp = ifa->ifa_ifp; 600 601 if (route_cb.any_count == 0) 602 return; 603 for (pass = 1; pass < 3; pass++) { 604 bzero((caddr_t)&info, sizeof(info)); 605 if ((cmd == RTM_ADD && pass == 1) || 606 (cmd == RTM_DELETE && pass == 2)) { 607 register struct ifa_msghdr *ifam; 608 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 609 610 ifaaddr = sa = ifa->ifa_addr; 611 ifpaddr = ifp->if_addrlist->ifa_addr; 612 netmask = ifa->ifa_netmask; 613 brdaddr = ifa->ifa_dstaddr; 614 if ((m = rt_msg1(ncmd, &info)) == NULL) 615 continue; 616 ifam = mtod(m, struct ifa_msghdr *); 617 ifam->ifam_index = ifp->if_index; 618 ifam->ifam_metric = ifa->ifa_metric; 619 ifam->ifam_flags = ifa->ifa_flags; 620 ifam->ifam_addrs = info.rti_addrs; 621 } 622 if ((cmd == RTM_ADD && pass == 2) || 623 (cmd == RTM_DELETE && pass == 1)) { 624 register struct rt_msghdr *rtm; 625 626 if (rt == 0) 627 continue; 628 netmask = rt_mask(rt); 629 dst = sa = rt_key(rt); 630 gate = rt->rt_gateway; 631 if ((m = rt_msg1(cmd, &info)) == NULL) 632 continue; 633 rtm = mtod(m, struct rt_msghdr *); 634 rtm->rtm_index = ifp->if_index; 635 rtm->rtm_flags |= rt->rt_flags; 636 rtm->rtm_errno = error; 637 rtm->rtm_addrs = info.rti_addrs; 638 } 639 route_proto.sp_protocol = sa ? sa->sa_family : 0; 640 raw_input(m, &route_proto, &route_src, &route_dst); 641 } 642 } 643 644 /* 645 * This is used in dumping the kernel table via sysctl(). 646 */ 647 int 648 sysctl_dumpentry(rn, w) 649 struct radix_node *rn; 650 register struct walkarg *w; 651 { 652 register struct sockaddr *sa; 653 register struct rtentry *rt = (struct rtentry *)rn; 654 int n, error = 0, size; 655 struct rt_addrinfo info; 656 657 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 658 return 0; 659 bzero((caddr_t)&info, sizeof(info)); 660 dst = rt_key(rt); 661 gate = rt->rt_gateway; 662 netmask = rt_mask(rt); 663 genmask = rt->rt_genmask; 664 size = rt_msg2(RTM_GET, &info, 0, w); 665 if (w->w_where && w->w_tmem) { 666 register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 667 668 rtm->rtm_flags = rt->rt_flags; 669 rtm->rtm_use = rt->rt_use; 670 rtm->rtm_rmx = rt->rt_rmx; 671 rtm->rtm_index = rt->rt_ifp->if_index; 672 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 673 rtm->rtm_addrs = info.rti_addrs; 674 if (error = copyout((caddr_t)rtm, w->w_where, size)) 675 w->w_where = NULL; 676 else 677 w->w_where += size; 678 } 679 return (error); 680 } 681 682 int 683 sysctl_iflist(af, w) 684 int af; 685 register struct walkarg *w; 686 { 687 register struct ifnet *ifp; 688 register struct ifaddr *ifa; 689 struct rt_addrinfo info; 690 struct sockaddr *sa; 691 int len, error = 0; 692 693 bzero((caddr_t)&info, sizeof(info)); 694 for (ifp = ifnet; ifp; ifp = ifp->if_next) { 695 if (w->w_arg && w->w_arg != ifp->if_index) 696 continue; 697 ifa = ifp->if_addrlist; 698 ifpaddr = ifa->ifa_addr; 699 len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w); 700 ifpaddr = 0; 701 if (w->w_where && w->w_tmem) { 702 register struct if_msghdr *ifm; 703 704 ifm = (struct if_msghdr *)w->w_tmem; 705 ifm->ifm_index = ifp->if_index; 706 ifm->ifm_flags = ifp->if_flags; 707 ifm->ifm_data = ifp->if_data; 708 ifm->ifm_addrs = info.rti_addrs; 709 if (error = copyout((caddr_t)ifm, w->w_where, len)) 710 return (error); 711 w->w_where += len; 712 } 713 while (ifa = ifa->ifa_next) { 714 if (af && af != ifa->ifa_addr->sa_family) 715 continue; 716 ifaaddr = ifa->ifa_addr; 717 netmask = ifa->ifa_netmask; 718 brdaddr = ifa->ifa_dstaddr; 719 len = rt_msg2(RTM_NEWADDR, &info, 0, w); 720 if (w->w_where && w->w_tmem) { 721 register struct ifa_msghdr *ifam; 722 723 ifam = (struct ifa_msghdr *)w->w_tmem; 724 ifam->ifam_index = ifa->ifa_ifp->if_index; 725 ifam->ifam_flags = ifa->ifa_flags; 726 ifam->ifam_metric = ifa->ifa_metric; 727 ifam->ifam_addrs = info.rti_addrs; 728 if (error = copyout(w->w_tmem, w->w_where, len)) 729 return (error); 730 w->w_where += len; 731 } 732 } 733 ifaaddr = netmask = brdaddr = 0; 734 } 735 return (0); 736 } 737 738 int 739 sysctl_rtable(name, namelen, where, given, new, newlen) 740 int *name; 741 int namelen; 742 caddr_t where; 743 size_t *given; 744 caddr_t *new; 745 size_t newlen; 746 { 747 register struct radix_node_head *rnh; 748 int i, s, error = EINVAL; 749 u_char af; 750 struct walkarg w; 751 752 if (new) 753 return (EPERM); 754 if (namelen != 3) 755 return (EINVAL); 756 af = name[0]; 757 Bzero(&w, sizeof(w)); 758 w.w_where = where; 759 w.w_given = *given; 760 w.w_needed = 0 - w.w_given; 761 w.w_op = name[1]; 762 w.w_arg = name[2]; 763 764 s = splnet(); 765 switch (w.w_op) { 766 767 case NET_RT_DUMP: 768 case NET_RT_FLAGS: 769 for (i = 1; i <= AF_MAX; i++) 770 if ((rnh = rt_tables[i]) && (af == 0 || af == i) && 771 (error = rnh->rnh_walktree(rnh, 772 sysctl_dumpentry, &w))) 773 break; 774 break; 775 776 case NET_RT_IFLIST: 777 error = sysctl_iflist(af, &w); 778 } 779 splx(s); 780 if (w.w_tmem) 781 free(w.w_tmem, M_RTABLE); 782 w.w_needed += w.w_given; 783 if (where) { 784 *given = w.w_where - where; 785 if (*given < w.w_needed) 786 return (ENOMEM); 787 } else { 788 *given = (11 * w.w_needed) / 10; 789 } 790 return (error); 791 } 792 793 /* 794 * Definitions of protocols supported in the ROUTE domain. 795 */ 796 797 extern struct domain routedomain; /* or at least forward */ 798 799 struct protosw routesw[] = { 800 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 801 raw_input, route_output, raw_ctlinput, 0, 802 route_usrreq, 803 raw_init, 0, 0, 0, 804 sysctl_rtable, 805 } 806 }; 807 808 struct domain routedomain = 809 { PF_ROUTE, "route", route_init, 0, 0, 810 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 811