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 8.3 (Berkeley) 01/04/94 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 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 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 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 539 540 if (route_cb.any_count == 0) 541 return; 542 m = rt_msg1(type, rtinfo); 543 if (m == 0) 544 return; 545 rtm = mtod(m, struct rt_msghdr *); 546 rtm->rtm_flags = RTF_DONE | flags; 547 rtm->rtm_errno = error; 548 rtm->rtm_addrs = rtinfo->rti_addrs; 549 route_proto.sp_protocol = sa ? sa->sa_family : 0; 550 raw_input(m, &route_proto, &route_src, &route_dst); 551 } 552 553 /* 554 * This routine is called to generate a message from the routing 555 * socket indicating that the status of a network interface has changed. 556 */ 557 void 558 rt_ifmsg(ifp) 559 register struct ifnet *ifp; 560 { 561 register struct if_msghdr *ifm; 562 struct mbuf *m; 563 struct rt_addrinfo info; 564 565 if (route_cb.any_count == 0) 566 return; 567 bzero((caddr_t)&info, sizeof(info)); 568 m = rt_msg1(RTM_IFINFO, &info); 569 if (m == 0) 570 return; 571 ifm = mtod(m, struct if_msghdr *); 572 ifm->ifm_index = ifp->if_index; 573 ifm->ifm_flags = ifp->if_flags; 574 ifm->ifm_data = ifp->if_data; 575 ifm->ifm_addrs = 0; 576 route_proto.sp_protocol = 0; 577 raw_input(m, &route_proto, &route_src, &route_dst); 578 } 579 580 /* 581 * This is called to generate messages from the routing socket 582 * indicating a network interface has had addresses associated with it. 583 * if we ever reverse the logic and replace messages TO the routing 584 * socket indicate a request to configure interfaces, then it will 585 * be unnecessary as the routing socket will automatically generate 586 * copies of it. 587 */ 588 void 589 rt_newaddrmsg(cmd, ifa, error, rt) 590 int cmd, error; 591 register struct ifaddr *ifa; 592 register struct rtentry *rt; 593 { 594 struct rt_addrinfo info; 595 struct sockaddr *sa; 596 int pass; 597 struct mbuf *m; 598 struct ifnet *ifp = ifa->ifa_ifp; 599 600 if (route_cb.any_count == 0) 601 return; 602 for (pass = 1; pass < 3; pass++) { 603 bzero((caddr_t)&info, sizeof(info)); 604 if ((cmd == RTM_ADD && pass == 1) || 605 (cmd == RTM_DELETE && pass == 2)) { 606 register struct ifa_msghdr *ifam; 607 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 608 609 ifaaddr = sa = ifa->ifa_addr; 610 ifpaddr = ifp->if_addrlist->ifa_addr; 611 netmask = ifa->ifa_netmask; 612 brdaddr = ifa->ifa_dstaddr; 613 if ((m = rt_msg1(ncmd, &info)) == NULL) 614 continue; 615 ifam = mtod(m, struct ifa_msghdr *); 616 ifam->ifam_index = ifp->if_index; 617 ifam->ifam_metric = ifa->ifa_metric; 618 ifam->ifam_flags = ifa->ifa_flags; 619 ifam->ifam_addrs = info.rti_addrs; 620 } 621 if ((cmd == RTM_ADD && pass == 2) || 622 (cmd == RTM_DELETE && pass == 1)) { 623 register struct rt_msghdr *rtm; 624 625 if (rt == 0) 626 continue; 627 netmask = rt_mask(rt); 628 dst = sa = rt_key(rt); 629 gate = rt->rt_gateway; 630 if ((m = rt_msg1(cmd, &info)) == NULL) 631 continue; 632 rtm = mtod(m, struct rt_msghdr *); 633 rtm->rtm_index = ifp->if_index; 634 rtm->rtm_flags |= rt->rt_flags; 635 rtm->rtm_errno = error; 636 rtm->rtm_addrs = info.rti_addrs; 637 } 638 route_proto.sp_protocol = sa ? sa->sa_family : 0; 639 raw_input(m, &route_proto, &route_src, &route_dst); 640 } 641 } 642 643 /* 644 * This is used in dumping the kernel table via sysctl(). 645 */ 646 int 647 sysctl_dumpentry(rn, w) 648 struct radix_node *rn; 649 register struct walkarg *w; 650 { 651 register struct rtentry *rt = (struct rtentry *)rn; 652 int error = 0, size; 653 struct rt_addrinfo info; 654 655 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 656 return 0; 657 bzero((caddr_t)&info, sizeof(info)); 658 dst = rt_key(rt); 659 gate = rt->rt_gateway; 660 netmask = rt_mask(rt); 661 genmask = rt->rt_genmask; 662 size = rt_msg2(RTM_GET, &info, 0, w); 663 if (w->w_where && w->w_tmem) { 664 register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 665 666 rtm->rtm_flags = rt->rt_flags; 667 rtm->rtm_use = rt->rt_use; 668 rtm->rtm_rmx = rt->rt_rmx; 669 rtm->rtm_index = rt->rt_ifp->if_index; 670 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 671 rtm->rtm_addrs = info.rti_addrs; 672 if (error = copyout((caddr_t)rtm, w->w_where, size)) 673 w->w_where = NULL; 674 else 675 w->w_where += size; 676 } 677 return (error); 678 } 679 680 int 681 sysctl_iflist(af, w) 682 int af; 683 register struct walkarg *w; 684 { 685 register struct ifnet *ifp; 686 register struct ifaddr *ifa; 687 struct rt_addrinfo info; 688 int len, error = 0; 689 690 bzero((caddr_t)&info, sizeof(info)); 691 for (ifp = ifnet; ifp; ifp = ifp->if_next) { 692 if (w->w_arg && w->w_arg != ifp->if_index) 693 continue; 694 ifa = ifp->if_addrlist; 695 ifpaddr = ifa->ifa_addr; 696 len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w); 697 ifpaddr = 0; 698 if (w->w_where && w->w_tmem) { 699 register struct if_msghdr *ifm; 700 701 ifm = (struct if_msghdr *)w->w_tmem; 702 ifm->ifm_index = ifp->if_index; 703 ifm->ifm_flags = ifp->if_flags; 704 ifm->ifm_data = ifp->if_data; 705 ifm->ifm_addrs = info.rti_addrs; 706 if (error = copyout((caddr_t)ifm, w->w_where, len)) 707 return (error); 708 w->w_where += len; 709 } 710 while (ifa = ifa->ifa_next) { 711 if (af && af != ifa->ifa_addr->sa_family) 712 continue; 713 ifaaddr = ifa->ifa_addr; 714 netmask = ifa->ifa_netmask; 715 brdaddr = ifa->ifa_dstaddr; 716 len = rt_msg2(RTM_NEWADDR, &info, 0, w); 717 if (w->w_where && w->w_tmem) { 718 register struct ifa_msghdr *ifam; 719 720 ifam = (struct ifa_msghdr *)w->w_tmem; 721 ifam->ifam_index = ifa->ifa_ifp->if_index; 722 ifam->ifam_flags = ifa->ifa_flags; 723 ifam->ifam_metric = ifa->ifa_metric; 724 ifam->ifam_addrs = info.rti_addrs; 725 if (error = copyout(w->w_tmem, w->w_where, len)) 726 return (error); 727 w->w_where += len; 728 } 729 } 730 ifaaddr = netmask = brdaddr = 0; 731 } 732 return (0); 733 } 734 735 int 736 sysctl_rtable(name, namelen, where, given, new, newlen) 737 int *name; 738 int namelen; 739 caddr_t where; 740 size_t *given; 741 caddr_t *new; 742 size_t newlen; 743 { 744 register struct radix_node_head *rnh; 745 int i, s, error = EINVAL; 746 u_char af; 747 struct walkarg w; 748 749 if (new) 750 return (EPERM); 751 if (namelen != 3) 752 return (EINVAL); 753 af = name[0]; 754 Bzero(&w, sizeof(w)); 755 w.w_where = where; 756 w.w_given = *given; 757 w.w_needed = 0 - w.w_given; 758 w.w_op = name[1]; 759 w.w_arg = name[2]; 760 761 s = splnet(); 762 switch (w.w_op) { 763 764 case NET_RT_DUMP: 765 case NET_RT_FLAGS: 766 for (i = 1; i <= AF_MAX; i++) 767 if ((rnh = rt_tables[i]) && (af == 0 || af == i) && 768 (error = rnh->rnh_walktree(rnh, 769 sysctl_dumpentry, &w))) 770 break; 771 break; 772 773 case NET_RT_IFLIST: 774 error = sysctl_iflist(af, &w); 775 } 776 splx(s); 777 if (w.w_tmem) 778 free(w.w_tmem, M_RTABLE); 779 w.w_needed += w.w_given; 780 if (where) { 781 *given = w.w_where - where; 782 if (*given < w.w_needed) 783 return (ENOMEM); 784 } else { 785 *given = (11 * w.w_needed) / 10; 786 } 787 return (error); 788 } 789 790 /* 791 * Definitions of protocols supported in the ROUTE domain. 792 */ 793 794 extern struct domain routedomain; /* or at least forward */ 795 796 struct protosw routesw[] = { 797 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 798 raw_input, route_output, raw_ctlinput, 0, 799 route_usrreq, 800 raw_init, 0, 0, 0, 801 sysctl_rtable, 802 } 803 }; 804 805 struct domain routedomain = 806 { PF_ROUTE, "route", route_init, 0, 0, 807 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 808