1 /* 2 * Copyright (c) 1988, 1991 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)rtsock.c 7.38 (Berkeley) 06/04/93 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/af.h> 20 #include <net/if.h> 21 #include <net/route.h> 22 #include <net/raw_cb.h> 23 24 struct sockaddr route_dst = { 2, PF_ROUTE, }; 25 struct sockaddr route_src = { 2, PF_ROUTE, }; 26 struct sockproto route_proto = { PF_ROUTE, }; 27 28 struct walkarg { 29 int w_op, w_arg, w_given, w_needed, w_tmemsize; 30 caddr_t w_where, w_tmem; 31 }; 32 33 static struct mbuf * 34 rt_msg1 __P((int, struct rt_addrinfo *)); 35 static int rt_msg2 __P((int, 36 struct rt_addrinfo *, caddr_t, struct walkarg *)); 37 static void rt_xaddrs __P((caddr_t, caddr_t, struct rt_addrinfo *)); 38 39 /* Sleazy use of local variables throughout file, warning!!!! */ 40 #define dst info.rti_info[RTAX_DST] 41 #define gate info.rti_info[RTAX_GATEWAY] 42 #define netmask info.rti_info[RTAX_NETMASK] 43 #define genmask info.rti_info[RTAX_GENMASK] 44 #define ifpaddr info.rti_info[RTAX_IFP] 45 #define ifaaddr info.rti_info[RTAX_IFA] 46 #define brdaddr info.rti_info[RTAX_BRD] 47 48 /*ARGSUSED*/ 49 int 50 route_usrreq(so, req, m, nam, control) 51 register struct socket *so; 52 int req; 53 struct mbuf *m, *nam, *control; 54 { 55 register int error = 0; 56 register struct rawcb *rp = sotorawcb(so); 57 int s; 58 if (req == PRU_ATTACH) { 59 MALLOC(rp, struct rawcb *, sizeof(*rp), M_PCB, M_WAITOK); 60 if (so->so_pcb = (caddr_t)rp) 61 bzero(so->so_pcb, sizeof(*rp)); 62 63 } 64 if (req == PRU_DETACH && rp) { 65 int af = rp->rcb_proto.sp_protocol; 66 if (af == AF_INET) 67 route_cb.ip_count--; 68 else if (af == AF_NS) 69 route_cb.ns_count--; 70 else if (af == AF_ISO) 71 route_cb.iso_count--; 72 route_cb.any_count--; 73 } 74 s = splnet(); 75 error = raw_usrreq(so, req, m, nam, control); 76 rp = sotorawcb(so); 77 if (req == PRU_ATTACH && rp) { 78 int af = rp->rcb_proto.sp_protocol; 79 if (error) { 80 free((caddr_t)rp, M_PCB); 81 splx(s); 82 return (error); 83 } 84 if (af == AF_INET) 85 route_cb.ip_count++; 86 else if (af == AF_NS) 87 route_cb.ns_count++; 88 else if (af == AF_ISO) 89 route_cb.iso_count++; 90 rp->rcb_faddr = &route_src; 91 route_cb.any_count++; 92 soisconnected(so); 93 so->so_options |= SO_USELOOPBACK; 94 } 95 splx(s); 96 return (error); 97 } 98 99 /*ARGSUSED*/ 100 int 101 route_output(m, so) 102 register struct mbuf *m; 103 struct socket *so; 104 { 105 register struct rt_msghdr *rtm = 0; 106 register struct rtentry *rt = 0; 107 struct rtentry *saved_nrt = 0; 108 struct rt_addrinfo info; 109 int len, error = 0; 110 struct ifnet *ifp = 0; 111 struct ifaddr *ifa = 0; 112 113 #define senderr(e) { error = e; goto flush;} 114 if (m == 0 || ((m->m_len < sizeof(long)) && 115 (m = m_pullup(m, sizeof(long))) == 0)) 116 return (ENOBUFS); 117 if ((m->m_flags & M_PKTHDR) == 0) 118 panic("route_output"); 119 len = m->m_pkthdr.len; 120 if (len < sizeof(*rtm) || 121 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 122 dst = 0; 123 senderr(EINVAL); 124 } 125 R_Malloc(rtm, struct rt_msghdr *, len); 126 if (rtm == 0) { 127 dst = 0; 128 senderr(ENOBUFS); 129 } 130 m_copydata(m, 0, len, (caddr_t)rtm); 131 if (rtm->rtm_version != RTM_VERSION) { 132 dst = 0; 133 senderr(EPROTONOSUPPORT); 134 } 135 rtm->rtm_pid = curproc->p_pid; 136 info.rti_addrs = rtm->rtm_addrs; 137 rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info); 138 if (dst == 0) 139 senderr(EINVAL); 140 if (genmask) { 141 struct radix_node *t; 142 t = rn_addmask((caddr_t)genmask, 1, 2); 143 if (t && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0) 144 genmask = (struct sockaddr *)(t->rn_key); 145 else 146 senderr(ENOBUFS); 147 } 148 switch (rtm->rtm_type) { 149 150 case RTM_ADD: 151 if (gate == 0) 152 senderr(EINVAL); 153 error = rtrequest(RTM_ADD, dst, gate, netmask, 154 rtm->rtm_flags, &saved_nrt); 155 if (error == 0 && saved_nrt) { 156 rt_setmetrics(rtm->rtm_inits, 157 &rtm->rtm_rmx, &saved_nrt->rt_rmx); 158 saved_nrt->rt_refcnt--; 159 saved_nrt->rt_genmask = genmask; 160 } 161 break; 162 163 case RTM_DELETE: 164 error = rtrequest(RTM_DELETE, dst, gate, netmask, 165 rtm->rtm_flags, (struct rtentry **)0); 166 break; 167 168 case RTM_GET: 169 case RTM_CHANGE: 170 case RTM_LOCK: 171 rt = rtalloc1(dst, 0); 172 if (rt == 0) 173 senderr(ESRCH); 174 if (rtm->rtm_type != RTM_GET) {/* XXX: too grotty */ 175 struct radix_node *rn; 176 extern struct radix_node_head *mask_rnhead; 177 178 if (Bcmp(dst, rt_key(rt), dst->sa_len) != 0) 179 senderr(ESRCH); 180 if (netmask && (rn = rn_search(netmask, 181 mask_rnhead->rnh_treetop))) 182 netmask = (struct sockaddr *)rn->rn_key; 183 for (rn = rt->rt_nodes; rn; rn = rn->rn_dupedkey) 184 if (netmask == (struct sockaddr *)rn->rn_mask) 185 break; 186 if (rn == 0) 187 senderr(ETOOMANYREFS); 188 rt = (struct rtentry *)rn; 189 } 190 switch(rtm->rtm_type) { 191 192 case RTM_GET: 193 dst = rt_key(rt); 194 gate = rt->rt_gateway; 195 netmask = rt_mask(rt); 196 genmask = rt->rt_genmask; 197 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 198 if (ifp = rt->rt_ifp) { 199 ifpaddr = ifp->if_addrlist->ifa_addr; 200 ifaaddr = rt->rt_ifa->ifa_addr; 201 rtm->rtm_index = ifp->if_index; 202 } else { 203 ifpaddr = 0; 204 ifaaddr = 0; 205 } 206 } 207 len = rt_msg2(RTM_GET, &info, (caddr_t)0, 208 (struct walkarg *)0); 209 if (len > rtm->rtm_msglen) { 210 struct rt_msghdr *new_rtm; 211 R_Malloc(new_rtm, struct rt_msghdr *, len); 212 if (new_rtm == 0) 213 senderr(ENOBUFS); 214 Bcopy(rtm, new_rtm, rtm->rtm_msglen); 215 Free(rtm); rtm = new_rtm; 216 } 217 (void)rt_msg2(RTM_GET, &info, (caddr_t)rtm, 218 (struct walkarg *)0); 219 rtm->rtm_flags = rt->rt_flags; 220 rtm->rtm_rmx = rt->rt_rmx; 221 rtm->rtm_addrs = info.rti_addrs; 222 break; 223 224 case RTM_CHANGE: 225 if (gate && rt_setgate(rt, rt_key(rt), gate)) 226 senderr(EDQUOT); 227 /* new gateway could require new ifaddr, ifp; 228 flags may also be different; ifp may be specified 229 by ll sockaddr when protocol address is ambiguous */ 230 if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) && 231 (ifp = ifa->ifa_ifp)) 232 ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate, 233 ifp); 234 else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) || 235 (ifa = ifa_ifwithroute(rt->rt_flags, 236 rt_key(rt), gate))) 237 ifp = ifa->ifa_ifp; 238 if (ifa) { 239 register struct ifaddr *oifa = rt->rt_ifa; 240 if (oifa != ifa) { 241 if (oifa && oifa->ifa_rtrequest) 242 oifa->ifa_rtrequest(RTM_DELETE, 243 rt, gate); 244 IFAFREE(rt->rt_ifa); 245 rt->rt_ifa = ifa; 246 ifa->ifa_refcnt++; 247 rt->rt_ifp = ifp; 248 } 249 } 250 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 251 &rt->rt_rmx); 252 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 253 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate); 254 if (genmask) 255 rt->rt_genmask = genmask; 256 /* 257 * Fall into 258 */ 259 case RTM_LOCK: 260 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 261 rt->rt_rmx.rmx_locks |= 262 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 263 break; 264 } 265 break; 266 267 default: 268 senderr(EOPNOTSUPP); 269 } 270 271 flush: 272 if (rtm) { 273 if (error) 274 rtm->rtm_errno = error; 275 else 276 rtm->rtm_flags |= RTF_DONE; 277 } 278 cleanup: 279 if (rt) 280 rtfree(rt); 281 { 282 register struct rawcb *rp = 0; 283 /* 284 * Check to see if we don't want our own messages. 285 */ 286 if ((so->so_options & SO_USELOOPBACK) == 0) { 287 if (route_cb.any_count <= 1) { 288 if (rtm) 289 Free(rtm); 290 m_freem(m); 291 return (error); 292 } 293 /* There is another listener, so construct message */ 294 rp = sotorawcb(so); 295 } 296 if (rtm) { 297 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 298 Free(rtm); 299 } 300 if (rp) 301 rp->rcb_proto.sp_family = 0; /* Avoid us */ 302 if (dst) 303 route_proto.sp_protocol = dst->sa_family; 304 raw_input(m, &route_proto, &route_src, &route_dst); 305 if (rp) 306 rp->rcb_proto.sp_family = PF_ROUTE; 307 } 308 return (error); 309 } 310 311 void 312 rt_setmetrics(which, in, out) 313 u_long which; 314 register struct rt_metrics *in, *out; 315 { 316 #define metric(f, e) if (which & (f)) out->e = in->e; 317 metric(RTV_RPIPE, rmx_recvpipe); 318 metric(RTV_SPIPE, rmx_sendpipe); 319 metric(RTV_SSTHRESH, rmx_ssthresh); 320 metric(RTV_RTT, rmx_rtt); 321 metric(RTV_RTTVAR, rmx_rttvar); 322 metric(RTV_HOPCOUNT, rmx_hopcount); 323 metric(RTV_MTU, rmx_mtu); 324 metric(RTV_EXPIRE, rmx_expire); 325 #undef metric 326 } 327 328 #define ROUNDUP(a) \ 329 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 330 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 331 332 static void 333 rt_xaddrs(cp, cplim, rtinfo) 334 register caddr_t cp, cplim; 335 register struct rt_addrinfo *rtinfo; 336 { 337 register struct sockaddr *sa; 338 register int i; 339 340 bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info)); 341 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 342 if ((rtinfo->rti_addrs & (1 << i)) == 0) 343 continue; 344 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 345 ADVANCE(cp, sa); 346 } 347 } 348 349 /* 350 * Copy data from a buffer back into the indicated mbuf chain, 351 * starting "off" bytes from the beginning, extending the mbuf 352 * chain if necessary. 353 */ 354 void 355 m_copyback(m0, off, len, cp) 356 struct mbuf *m0; 357 register int off; 358 register int len; 359 caddr_t cp; 360 { 361 register int mlen; 362 register struct mbuf *m = m0, *n; 363 int totlen = 0; 364 365 if (m0 == 0) 366 return; 367 while (off > (mlen = m->m_len)) { 368 off -= mlen; 369 totlen += mlen; 370 if (m->m_next == 0) { 371 n = m_getclr(M_DONTWAIT, m->m_type); 372 if (n == 0) 373 goto out; 374 n->m_len = min(MLEN, len + off); 375 m->m_next = n; 376 } 377 m = m->m_next; 378 } 379 while (len > 0) { 380 mlen = min (m->m_len - off, len); 381 bcopy(cp, off + mtod(m, caddr_t), (unsigned)mlen); 382 cp += mlen; 383 len -= mlen; 384 mlen += off; 385 off = 0; 386 totlen += mlen; 387 if (len == 0) 388 break; 389 if (m->m_next == 0) { 390 n = m_get(M_DONTWAIT, m->m_type); 391 if (n == 0) 392 break; 393 n->m_len = min(MLEN, len); 394 m->m_next = n; 395 } 396 m = m->m_next; 397 } 398 out: if (((m = m0)->m_flags & M_PKTHDR) && (m->m_pkthdr.len < totlen)) 399 m->m_pkthdr.len = totlen; 400 } 401 402 static struct mbuf * 403 rt_msg1(type, rtinfo) 404 int type; 405 register struct rt_addrinfo *rtinfo; 406 { 407 register struct rt_msghdr *rtm; 408 register struct mbuf *m; 409 register int i; 410 register struct sockaddr *sa; 411 int len, dlen; 412 413 m = m_gethdr(M_DONTWAIT, MT_DATA); 414 if (m == 0) 415 return (m); 416 switch (type) { 417 418 case RTM_DELADDR: 419 case RTM_NEWADDR: 420 len = sizeof(struct ifa_msghdr); 421 break; 422 423 case RTM_IFINFO: 424 len = sizeof(struct if_msghdr); 425 break; 426 427 default: 428 len = sizeof(struct rt_msghdr); 429 } 430 if (len > MHLEN) 431 panic("rt_msg1"); 432 m->m_pkthdr.len = m->m_len = len; 433 m->m_pkthdr.rcvif = 0; 434 rtm = mtod(m, struct rt_msghdr *); 435 bzero((caddr_t)rtm, len); 436 for (i = 0; i < RTAX_MAX; i++) { 437 if ((sa = rtinfo->rti_info[i]) == NULL) 438 continue; 439 rtinfo->rti_addrs |= (1 << i); 440 dlen = ROUNDUP(sa->sa_len); 441 m_copyback(m, len, dlen, (caddr_t)sa); 442 len += dlen; 443 } 444 if (m->m_pkthdr.len != len) { 445 m_freem(m); 446 return (NULL); 447 } 448 rtm->rtm_msglen = len; 449 rtm->rtm_version = RTM_VERSION; 450 rtm->rtm_type = type; 451 return (m); 452 } 453 454 static int 455 rt_msg2(type, rtinfo, cp, w) 456 int type; 457 register struct rt_addrinfo *rtinfo; 458 caddr_t cp; 459 struct walkarg *w; 460 { 461 register int i; 462 int len, dlen, second_time = 0; 463 caddr_t cp0; 464 465 rtinfo->rti_addrs = 0; 466 again: 467 switch (type) { 468 469 case RTM_DELADDR: 470 case RTM_NEWADDR: 471 len = sizeof(struct ifa_msghdr); 472 break; 473 474 case RTM_IFINFO: 475 len = sizeof(struct if_msghdr); 476 break; 477 478 default: 479 len = sizeof(struct rt_msghdr); 480 } 481 if (cp0 = cp) 482 cp += len; 483 for (i = 0; i < RTAX_MAX; i++) { 484 register struct sockaddr *sa; 485 486 if ((sa = rtinfo->rti_info[i]) == 0) 487 continue; 488 rtinfo->rti_addrs |= (1 << i); 489 dlen = ROUNDUP(sa->sa_len); 490 if (cp) { 491 bcopy((caddr_t)sa, cp, (unsigned)dlen); 492 cp += dlen; 493 } 494 len += dlen; 495 } 496 if (cp == 0 && w != NULL && !second_time) { 497 register struct walkarg *rw = w; 498 499 rw->w_needed += len; 500 if (rw->w_needed <= 0 && rw->w_where) { 501 if (rw->w_tmemsize < len) { 502 if (rw->w_tmem) 503 free(rw->w_tmem, M_RTABLE); 504 if (rw->w_tmem = (caddr_t) 505 malloc(len, M_RTABLE, M_NOWAIT)) 506 rw->w_tmemsize = len; 507 } 508 if (rw->w_tmem) { 509 cp = rw->w_tmem; 510 second_time = 1; 511 goto again; 512 } else 513 rw->w_where = 0; 514 } 515 } 516 if (cp) { 517 register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 518 519 rtm->rtm_version = RTM_VERSION; 520 rtm->rtm_type = type; 521 rtm->rtm_msglen = len; 522 } 523 return (len); 524 } 525 526 /* 527 * This routine is called to generate a message from the routing 528 * socket indicating that a redirect has occured, a routing lookup 529 * has failed, or that a protocol has detected timeouts to a particular 530 * destination. 531 */ 532 void 533 rt_missmsg(type, rtinfo, flags, error) 534 int type, flags, error; 535 register struct rt_addrinfo *rtinfo; 536 { 537 register struct rt_msghdr *rtm; 538 register struct mbuf *m; 539 register int i; 540 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 541 542 if (route_cb.any_count == 0) 543 return; 544 m = rt_msg1(type, rtinfo); 545 if (m == 0) 546 return; 547 rtm = mtod(m, struct rt_msghdr *); 548 rtm->rtm_flags = RTF_DONE | flags; 549 rtm->rtm_errno = error; 550 rtm->rtm_addrs = rtinfo->rti_addrs; 551 route_proto.sp_protocol = sa ? sa->sa_family : 0; 552 raw_input(m, &route_proto, &route_src, &route_dst); 553 } 554 555 /* 556 * This routine is called to generate a message from the routing 557 * socket indicating that the status of a network interface has changed. 558 */ 559 void 560 rt_ifmsg(ifp) 561 register struct ifnet *ifp; 562 { 563 register struct if_msghdr *ifm; 564 struct mbuf *m; 565 struct rt_addrinfo info; 566 567 if (route_cb.any_count == 0) 568 return; 569 bzero((caddr_t)&info, sizeof(info)); 570 m = rt_msg1(RTM_IFINFO, &info); 571 if (m == 0) 572 return; 573 ifm = mtod(m, struct if_msghdr *); 574 ifm->ifm_index = ifp->if_index; 575 ifm->ifm_flags = ifp->if_flags; 576 ifm->ifm_data = ifp->if_data; 577 ifm->ifm_addrs = 0; 578 route_proto.sp_protocol = 0; 579 raw_input(m, &route_proto, &route_src, &route_dst); 580 } 581 582 /* 583 * This is called to generate messages from the routing socket 584 * indicating a network interface has had addresses associated with it. 585 * if we ever reverse the logic and replace messages TO the routing 586 * socket indicate a request to configure interfaces, then it will 587 * be unnecessary as the routing socket will automatically generate 588 * copies of it. 589 */ 590 void 591 rt_newaddrmsg(cmd, ifa, error, rt) 592 int cmd, error; 593 register struct ifaddr *ifa; 594 register struct rtentry *rt; 595 { 596 struct rt_addrinfo info; 597 struct sockaddr *sa; 598 int pass; 599 struct mbuf *m; 600 struct ifnet *ifp = ifa->ifa_ifp; 601 602 if (route_cb.any_count == 0) 603 return; 604 for (pass = 1; pass < 3; pass++) { 605 bzero((caddr_t)&info, sizeof(info)); 606 if ((cmd == RTM_ADD && pass == 1) || 607 (cmd == RTM_DELETE && pass == 2)) { 608 register struct ifa_msghdr *ifam; 609 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 610 611 ifaaddr = sa = ifa->ifa_addr; 612 ifpaddr = ifp->if_addrlist->ifa_addr; 613 netmask = ifa->ifa_netmask; 614 brdaddr = ifa->ifa_dstaddr; 615 if ((m = rt_msg1(ncmd, &info)) == NULL) 616 continue; 617 ifam = mtod(m, struct ifa_msghdr *); 618 ifam->ifam_index = ifp->if_index; 619 ifam->ifam_metric = ifa->ifa_metric; 620 ifam->ifam_flags = ifa->ifa_flags; 621 ifam->ifam_addrs = info.rti_addrs; 622 } 623 if ((cmd == RTM_ADD && pass == 2) || 624 (cmd == RTM_DELETE && pass == 1)) { 625 register struct rt_msghdr *rtm; 626 627 if (rt == 0) 628 continue; 629 netmask = rt_mask(rt); 630 dst = sa = rt_key(rt); 631 gate = rt->rt_gateway; 632 if ((m = rt_msg1(cmd, &info)) == NULL) 633 continue; 634 rtm = mtod(m, struct rt_msghdr *); 635 rtm->rtm_index = ifp->if_index; 636 rtm->rtm_flags |= rt->rt_flags; 637 rtm->rtm_errno = error; 638 rtm->rtm_addrs = info.rti_addrs; 639 } 640 route_proto.sp_protocol = sa ? sa->sa_family : 0; 641 raw_input(m, &route_proto, &route_src, &route_dst); 642 } 643 } 644 645 /* 646 * This is used in dumping the kernel table via sysctl(). 647 */ 648 int 649 sysctl_dumpentry(rn, w) 650 struct radix_node *rn; 651 register struct walkarg *w; 652 { 653 register struct sockaddr *sa; 654 register struct rtentry *rt = (struct rtentry *)rn; 655 int n, error = 0, size; 656 struct rt_addrinfo info; 657 658 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 659 return 0; 660 bzero((caddr_t)&info, sizeof(info)); 661 dst = rt_key(rt); 662 gate = rt->rt_gateway; 663 netmask = rt_mask(rt); 664 genmask = rt->rt_genmask; 665 size = rt_msg2(RTM_GET, &info, 0, w); 666 if (w->w_where && w->w_tmem) { 667 register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 668 669 rtm->rtm_flags = rt->rt_flags; 670 rtm->rtm_use = rt->rt_use; 671 rtm->rtm_rmx = rt->rt_rmx; 672 rtm->rtm_index = rt->rt_ifp->if_index; 673 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 674 rtm->rtm_addrs = info.rti_addrs; 675 if (error = copyout((caddr_t)rtm, w->w_where, size)) 676 w->w_where = NULL; 677 else 678 w->w_where += size; 679 } 680 return (error); 681 } 682 683 int 684 sysctl_iflist(af, w) 685 int af; 686 register struct walkarg *w; 687 { 688 register struct ifnet *ifp; 689 register struct ifaddr *ifa; 690 struct rt_addrinfo info; 691 struct sockaddr *sa; 692 int len, error = 0; 693 694 bzero((caddr_t)&info, sizeof(info)); 695 for (ifp = ifnet; ifp; ifp = ifp->if_next) { 696 if (w->w_arg && w->w_arg != ifp->if_index) 697 continue; 698 ifa = ifp->if_addrlist; 699 ifpaddr = ifa->ifa_addr; 700 len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w); 701 ifpaddr = 0; 702 if (w->w_where && w->w_tmem) { 703 register struct if_msghdr *ifm; 704 705 ifm = (struct if_msghdr *)w->w_tmem; 706 ifm->ifm_index = ifp->if_index; 707 ifm->ifm_flags = ifp->if_flags; 708 ifm->ifm_data = ifp->if_data; 709 ifm->ifm_addrs = info.rti_addrs; 710 if (error = copyout((caddr_t)ifm, w->w_where, len)) 711 return (error); 712 w->w_where += len; 713 } 714 while (ifa = ifa->ifa_next) { 715 if (af && af != ifa->ifa_addr->sa_family) 716 continue; 717 ifaaddr = ifa->ifa_addr; 718 netmask = ifa->ifa_netmask; 719 brdaddr = ifa->ifa_dstaddr; 720 len = rt_msg2(RTM_NEWADDR, &info, 0, w); 721 if (w->w_where && w->w_tmem) { 722 register struct ifa_msghdr *ifam; 723 724 ifam = (struct ifa_msghdr *)w->w_tmem; 725 ifam->ifam_index = ifa->ifa_ifp->if_index; 726 ifam->ifam_flags = ifa->ifa_flags; 727 ifam->ifam_metric = ifa->ifa_metric; 728 ifam->ifam_addrs = info.rti_addrs; 729 if (error = copyout(w->w_tmem, w->w_where, len)) 730 return (error); 731 w->w_where += len; 732 } 733 } 734 ifaaddr = netmask = brdaddr = 0; 735 } 736 return (0); 737 } 738 739 int 740 sysctl_rtable(name, namelen, where, given, new, newlen) 741 int *name; 742 int namelen; 743 caddr_t where; 744 size_t *given; 745 caddr_t *new; 746 size_t newlen; 747 { 748 register struct radix_node_head *rnh; 749 int i, s, error = EINVAL; 750 u_char af; 751 struct walkarg w; 752 753 if (new) 754 return (EPERM); 755 if (namelen != 3) 756 return (EINVAL); 757 af = name[0]; 758 Bzero(&w, sizeof(w)); 759 w.w_where = where; 760 w.w_given = *given; 761 w.w_needed = 0 - w.w_given; 762 w.w_op = name[1]; 763 w.w_arg = name[2]; 764 765 s = splnet(); 766 switch (w.w_op) { 767 768 case NET_RT_DUMP: 769 case NET_RT_FLAGS: 770 for (i = 1; i <= AF_MAX; i++) 771 if ((rnh = rt_tables[i]) && (af == 0 || af == i) && 772 (error = rnh->rnh_walktree(rnh, 773 sysctl_dumpentry, &w))) 774 break; 775 break; 776 777 case NET_RT_IFLIST: 778 error = sysctl_iflist(af, &w); 779 } 780 splx(s); 781 if (w.w_tmem) 782 free(w.w_tmem, M_RTABLE); 783 w.w_needed += w.w_given; 784 if (where) { 785 *given = w.w_where - where; 786 if (*given < w.w_needed) 787 return (ENOMEM); 788 } else { 789 *given = (11 * w.w_needed) / 10; 790 } 791 return (error); 792 } 793 794 /* 795 * Definitions of protocols supported in the ROUTE domain. 796 */ 797 798 extern struct domain routedomain; /* or at least forward */ 799 800 struct protosw routesw[] = { 801 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 802 raw_input, route_output, raw_ctlinput, 0, 803 route_usrreq, 804 raw_init, 0, 0, 0, 805 sysctl_rtable, 806 } 807 }; 808 809 struct domain routedomain = 810 { PF_ROUTE, "route", route_init, 0, 0, 811 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 812