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 8.3.1.1 (Berkeley) 10/09/94 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 radix_node_head *rnh; 109 struct rt_addrinfo info; 110 int len, error = 0; 111 struct ifnet *ifp = 0; 112 struct ifaddr *ifa = 0; 113 114 #define senderr(e) { error = e; goto flush;} 115 if (m == 0 || ((m->m_len < sizeof(long)) && 116 (m = m_pullup(m, sizeof(long))) == 0)) 117 return (ENOBUFS); 118 if ((m->m_flags & M_PKTHDR) == 0) 119 panic("route_output"); 120 len = m->m_pkthdr.len; 121 if (len < sizeof(*rtm) || 122 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 123 dst = 0; 124 senderr(EINVAL); 125 } 126 R_Malloc(rtm, struct rt_msghdr *, len); 127 if (rtm == 0) { 128 dst = 0; 129 senderr(ENOBUFS); 130 } 131 m_copydata(m, 0, len, (caddr_t)rtm); 132 if (rtm->rtm_version != RTM_VERSION) { 133 dst = 0; 134 senderr(EPROTONOSUPPORT); 135 } 136 rtm->rtm_pid = curproc->p_pid; 137 info.rti_addrs = rtm->rtm_addrs; 138 rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info); 139 if (dst == 0) 140 senderr(EINVAL); 141 if (genmask) { 142 struct radix_node *t; 143 t = rn_addmask((caddr_t)genmask, 0, 1); 144 if (t && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0) 145 genmask = (struct sockaddr *)(t->rn_key); 146 else 147 senderr(ENOBUFS); 148 } 149 switch (rtm->rtm_type) { 150 151 case RTM_ADD: 152 if (gate == 0) 153 senderr(EINVAL); 154 error = rtrequest(RTM_ADD, dst, gate, netmask, 155 rtm->rtm_flags, &saved_nrt); 156 if (error == 0 && saved_nrt) { 157 rt_setmetrics(rtm->rtm_inits, 158 &rtm->rtm_rmx, &saved_nrt->rt_rmx); 159 saved_nrt->rt_refcnt--; 160 saved_nrt->rt_genmask = genmask; 161 } 162 break; 163 164 case RTM_DELETE: 165 error = rtrequest(RTM_DELETE, dst, gate, netmask, 166 rtm->rtm_flags, (struct rtentry **)0); 167 break; 168 169 case RTM_GET: 170 case RTM_CHANGE: 171 case RTM_LOCK: 172 if ((rnh = rt_tables[dst->sa_family]) == 0) 173 senderr(EAFNOSUPPORT); 174 else if (rt = (struct rtentry *) 175 rnh->rnh_lookup(dst, netmask, rnh)) 176 rt->rt_refcnt++; 177 else 178 senderr(ESRCH); 179 switch(rtm->rtm_type) { 180 181 case RTM_GET: 182 dst = rt_key(rt); 183 gate = rt->rt_gateway; 184 netmask = rt_mask(rt); 185 genmask = rt->rt_genmask; 186 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 187 if (ifp = rt->rt_ifp) { 188 ifpaddr = ifp->if_addrlist->ifa_addr; 189 ifaaddr = rt->rt_ifa->ifa_addr; 190 rtm->rtm_index = ifp->if_index; 191 } else { 192 ifpaddr = 0; 193 ifaaddr = 0; 194 } 195 } 196 len = rt_msg2(RTM_GET, &info, (caddr_t)0, 197 (struct walkarg *)0); 198 if (len > rtm->rtm_msglen) { 199 struct rt_msghdr *new_rtm; 200 R_Malloc(new_rtm, struct rt_msghdr *, len); 201 if (new_rtm == 0) 202 senderr(ENOBUFS); 203 Bcopy(rtm, new_rtm, rtm->rtm_msglen); 204 Free(rtm); rtm = new_rtm; 205 } 206 (void)rt_msg2(RTM_GET, &info, (caddr_t)rtm, 207 (struct walkarg *)0); 208 rtm->rtm_flags = rt->rt_flags; 209 rtm->rtm_rmx = rt->rt_rmx; 210 rtm->rtm_addrs = info.rti_addrs; 211 break; 212 213 case RTM_CHANGE: 214 if (gate && rt_setgate(rt, rt_key(rt), gate)) 215 senderr(EDQUOT); 216 /* new gateway could require new ifaddr, ifp; 217 flags may also be different; ifp may be specified 218 by ll sockaddr when protocol address is ambiguous */ 219 if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) && 220 (ifp = ifa->ifa_ifp)) 221 ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate, 222 ifp); 223 else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) || 224 (ifa = ifa_ifwithroute(rt->rt_flags, 225 rt_key(rt), gate))) 226 ifp = ifa->ifa_ifp; 227 if (ifa) { 228 register struct ifaddr *oifa = rt->rt_ifa; 229 if (oifa != ifa) { 230 if (oifa && oifa->ifa_rtrequest) 231 oifa->ifa_rtrequest(RTM_DELETE, 232 rt, gate); 233 IFAFREE(rt->rt_ifa); 234 rt->rt_ifa = ifa; 235 ifa->ifa_refcnt++; 236 rt->rt_ifp = ifp; 237 } 238 } 239 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 240 &rt->rt_rmx); 241 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 242 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate); 243 if (genmask) 244 rt->rt_genmask = genmask; 245 /* 246 * Fall into 247 */ 248 case RTM_LOCK: 249 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 250 rt->rt_rmx.rmx_locks |= 251 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 252 break; 253 } 254 break; 255 256 default: 257 senderr(EOPNOTSUPP); 258 } 259 260 flush: 261 if (rtm) { 262 if (error) 263 rtm->rtm_errno = error; 264 else 265 rtm->rtm_flags |= RTF_DONE; 266 } 267 if (rt) 268 rtfree(rt); 269 { 270 register struct rawcb *rp = 0; 271 /* 272 * Check to see if we don't want our own messages. 273 */ 274 if ((so->so_options & SO_USELOOPBACK) == 0) { 275 if (route_cb.any_count <= 1) { 276 if (rtm) 277 Free(rtm); 278 m_freem(m); 279 return (error); 280 } 281 /* There is another listener, so construct message */ 282 rp = sotorawcb(so); 283 } 284 if (rtm) { 285 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 286 Free(rtm); 287 } 288 if (rp) 289 rp->rcb_proto.sp_family = 0; /* Avoid us */ 290 if (dst) 291 route_proto.sp_protocol = dst->sa_family; 292 raw_input(m, &route_proto, &route_src, &route_dst); 293 if (rp) 294 rp->rcb_proto.sp_family = PF_ROUTE; 295 } 296 return (error); 297 } 298 299 void 300 rt_setmetrics(which, in, out) 301 u_long which; 302 register struct rt_metrics *in, *out; 303 { 304 #define metric(f, e) if (which & (f)) out->e = in->e; 305 metric(RTV_RPIPE, rmx_recvpipe); 306 metric(RTV_SPIPE, rmx_sendpipe); 307 metric(RTV_SSTHRESH, rmx_ssthresh); 308 metric(RTV_RTT, rmx_rtt); 309 metric(RTV_RTTVAR, rmx_rttvar); 310 metric(RTV_HOPCOUNT, rmx_hopcount); 311 metric(RTV_MTU, rmx_mtu); 312 metric(RTV_EXPIRE, rmx_expire); 313 #undef metric 314 } 315 316 #define ROUNDUP(a) \ 317 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 318 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 319 320 static void 321 rt_xaddrs(cp, cplim, rtinfo) 322 register caddr_t cp, cplim; 323 register struct rt_addrinfo *rtinfo; 324 { 325 register struct sockaddr *sa; 326 register int i; 327 328 bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info)); 329 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 330 if ((rtinfo->rti_addrs & (1 << i)) == 0) 331 continue; 332 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 333 ADVANCE(cp, sa); 334 } 335 } 336 337 /* 338 * Copy data from a buffer back into the indicated mbuf chain, 339 * starting "off" bytes from the beginning, extending the mbuf 340 * chain if necessary. 341 */ 342 void 343 m_copyback(m0, off, len, cp) 344 struct mbuf *m0; 345 register int off; 346 register int len; 347 caddr_t cp; 348 { 349 register int mlen; 350 register struct mbuf *m = m0, *n; 351 int totlen = 0; 352 353 if (m0 == 0) 354 return; 355 while (off > (mlen = m->m_len)) { 356 off -= mlen; 357 totlen += mlen; 358 if (m->m_next == 0) { 359 n = m_getclr(M_DONTWAIT, m->m_type); 360 if (n == 0) 361 goto out; 362 n->m_len = min(MLEN, len + off); 363 m->m_next = n; 364 } 365 m = m->m_next; 366 } 367 while (len > 0) { 368 mlen = min (m->m_len - off, len); 369 bcopy(cp, off + mtod(m, caddr_t), (unsigned)mlen); 370 cp += mlen; 371 len -= mlen; 372 mlen += off; 373 off = 0; 374 totlen += mlen; 375 if (len == 0) 376 break; 377 if (m->m_next == 0) { 378 n = m_get(M_DONTWAIT, m->m_type); 379 if (n == 0) 380 break; 381 n->m_len = min(MLEN, len); 382 m->m_next = n; 383 } 384 m = m->m_next; 385 } 386 out: if (((m = m0)->m_flags & M_PKTHDR) && (m->m_pkthdr.len < totlen)) 387 m->m_pkthdr.len = totlen; 388 } 389 390 static struct mbuf * 391 rt_msg1(type, rtinfo) 392 int type; 393 register struct rt_addrinfo *rtinfo; 394 { 395 register struct rt_msghdr *rtm; 396 register struct mbuf *m; 397 register int i; 398 register struct sockaddr *sa; 399 int len, dlen; 400 401 m = m_gethdr(M_DONTWAIT, MT_DATA); 402 if (m == 0) 403 return (m); 404 switch (type) { 405 406 case RTM_DELADDR: 407 case RTM_NEWADDR: 408 len = sizeof(struct ifa_msghdr); 409 break; 410 411 case RTM_IFINFO: 412 len = sizeof(struct if_msghdr); 413 break; 414 415 default: 416 len = sizeof(struct rt_msghdr); 417 } 418 if (len > MHLEN) 419 panic("rt_msg1"); 420 m->m_pkthdr.len = m->m_len = len; 421 m->m_pkthdr.rcvif = 0; 422 rtm = mtod(m, struct rt_msghdr *); 423 bzero((caddr_t)rtm, len); 424 for (i = 0; i < RTAX_MAX; i++) { 425 if ((sa = rtinfo->rti_info[i]) == NULL) 426 continue; 427 rtinfo->rti_addrs |= (1 << i); 428 dlen = ROUNDUP(sa->sa_len); 429 m_copyback(m, len, dlen, (caddr_t)sa); 430 len += dlen; 431 } 432 if (m->m_pkthdr.len != len) { 433 m_freem(m); 434 return (NULL); 435 } 436 rtm->rtm_msglen = len; 437 rtm->rtm_version = RTM_VERSION; 438 rtm->rtm_type = type; 439 return (m); 440 } 441 442 static int 443 rt_msg2(type, rtinfo, cp, w) 444 int type; 445 register struct rt_addrinfo *rtinfo; 446 caddr_t cp; 447 struct walkarg *w; 448 { 449 register int i; 450 int len, dlen, second_time = 0; 451 caddr_t cp0; 452 453 rtinfo->rti_addrs = 0; 454 again: 455 switch (type) { 456 457 case RTM_DELADDR: 458 case RTM_NEWADDR: 459 len = sizeof(struct ifa_msghdr); 460 break; 461 462 case RTM_IFINFO: 463 len = sizeof(struct if_msghdr); 464 break; 465 466 default: 467 len = sizeof(struct rt_msghdr); 468 } 469 if (cp0 = cp) 470 cp += len; 471 for (i = 0; i < RTAX_MAX; i++) { 472 register struct sockaddr *sa; 473 474 if ((sa = rtinfo->rti_info[i]) == 0) 475 continue; 476 rtinfo->rti_addrs |= (1 << i); 477 dlen = ROUNDUP(sa->sa_len); 478 if (cp) { 479 bcopy((caddr_t)sa, cp, (unsigned)dlen); 480 cp += dlen; 481 } 482 len += dlen; 483 } 484 if (cp == 0 && w != NULL && !second_time) { 485 register struct walkarg *rw = w; 486 487 rw->w_needed += len; 488 if (rw->w_needed <= 0 && rw->w_where) { 489 if (rw->w_tmemsize < len) { 490 if (rw->w_tmem) 491 free(rw->w_tmem, M_RTABLE); 492 if (rw->w_tmem = (caddr_t) 493 malloc(len, M_RTABLE, M_NOWAIT)) 494 rw->w_tmemsize = len; 495 } 496 if (rw->w_tmem) { 497 cp = rw->w_tmem; 498 second_time = 1; 499 goto again; 500 } else 501 rw->w_where = 0; 502 } 503 } 504 if (cp) { 505 register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 506 507 rtm->rtm_version = RTM_VERSION; 508 rtm->rtm_type = type; 509 rtm->rtm_msglen = len; 510 } 511 return (len); 512 } 513 514 /* 515 * This routine is called to generate a message from the routing 516 * socket indicating that a redirect has occured, a routing lookup 517 * has failed, or that a protocol has detected timeouts to a particular 518 * destination. 519 */ 520 void 521 rt_missmsg(type, rtinfo, flags, error) 522 int type, flags, error; 523 register struct rt_addrinfo *rtinfo; 524 { 525 register struct rt_msghdr *rtm; 526 register struct mbuf *m; 527 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 528 529 if (route_cb.any_count == 0) 530 return; 531 m = rt_msg1(type, rtinfo); 532 if (m == 0) 533 return; 534 rtm = mtod(m, struct rt_msghdr *); 535 rtm->rtm_flags = RTF_DONE | flags; 536 rtm->rtm_errno = error; 537 rtm->rtm_addrs = rtinfo->rti_addrs; 538 route_proto.sp_protocol = sa ? sa->sa_family : 0; 539 raw_input(m, &route_proto, &route_src, &route_dst); 540 } 541 542 /* 543 * This routine is called to generate a message from the routing 544 * socket indicating that the status of a network interface has changed. 545 */ 546 void 547 rt_ifmsg(ifp) 548 register struct ifnet *ifp; 549 { 550 register struct if_msghdr *ifm; 551 struct mbuf *m; 552 struct rt_addrinfo info; 553 554 if (route_cb.any_count == 0) 555 return; 556 bzero((caddr_t)&info, sizeof(info)); 557 m = rt_msg1(RTM_IFINFO, &info); 558 if (m == 0) 559 return; 560 ifm = mtod(m, struct if_msghdr *); 561 ifm->ifm_index = ifp->if_index; 562 ifm->ifm_flags = ifp->if_flags; 563 ifm->ifm_data = ifp->if_data; 564 ifm->ifm_addrs = 0; 565 route_proto.sp_protocol = 0; 566 raw_input(m, &route_proto, &route_src, &route_dst); 567 } 568 569 /* 570 * This is called to generate messages from the routing socket 571 * indicating a network interface has had addresses associated with it. 572 * if we ever reverse the logic and replace messages TO the routing 573 * socket indicate a request to configure interfaces, then it will 574 * be unnecessary as the routing socket will automatically generate 575 * copies of it. 576 */ 577 void 578 rt_newaddrmsg(cmd, ifa, error, rt) 579 int cmd, error; 580 register struct ifaddr *ifa; 581 register struct rtentry *rt; 582 { 583 struct rt_addrinfo info; 584 struct sockaddr *sa; 585 int pass; 586 struct mbuf *m; 587 struct ifnet *ifp = ifa->ifa_ifp; 588 589 if (route_cb.any_count == 0) 590 return; 591 for (pass = 1; pass < 3; pass++) { 592 bzero((caddr_t)&info, sizeof(info)); 593 if ((cmd == RTM_ADD && pass == 1) || 594 (cmd == RTM_DELETE && pass == 2)) { 595 register struct ifa_msghdr *ifam; 596 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 597 598 ifaaddr = sa = ifa->ifa_addr; 599 ifpaddr = ifp->if_addrlist->ifa_addr; 600 netmask = ifa->ifa_netmask; 601 brdaddr = ifa->ifa_dstaddr; 602 if ((m = rt_msg1(ncmd, &info)) == NULL) 603 continue; 604 ifam = mtod(m, struct ifa_msghdr *); 605 ifam->ifam_index = ifp->if_index; 606 ifam->ifam_metric = ifa->ifa_metric; 607 ifam->ifam_flags = ifa->ifa_flags; 608 ifam->ifam_addrs = info.rti_addrs; 609 } 610 if ((cmd == RTM_ADD && pass == 2) || 611 (cmd == RTM_DELETE && pass == 1)) { 612 register struct rt_msghdr *rtm; 613 614 if (rt == 0) 615 continue; 616 netmask = rt_mask(rt); 617 dst = sa = rt_key(rt); 618 gate = rt->rt_gateway; 619 if ((m = rt_msg1(cmd, &info)) == NULL) 620 continue; 621 rtm = mtod(m, struct rt_msghdr *); 622 rtm->rtm_index = ifp->if_index; 623 rtm->rtm_flags |= rt->rt_flags; 624 rtm->rtm_errno = error; 625 rtm->rtm_addrs = info.rti_addrs; 626 } 627 route_proto.sp_protocol = sa ? sa->sa_family : 0; 628 raw_input(m, &route_proto, &route_src, &route_dst); 629 } 630 } 631 632 /* 633 * This is used in dumping the kernel table via sysctl(). 634 */ 635 int 636 sysctl_dumpentry(rn, w) 637 struct radix_node *rn; 638 register struct walkarg *w; 639 { 640 register struct rtentry *rt = (struct rtentry *)rn; 641 int error = 0, size; 642 struct rt_addrinfo info; 643 644 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 645 return 0; 646 bzero((caddr_t)&info, sizeof(info)); 647 dst = rt_key(rt); 648 gate = rt->rt_gateway; 649 netmask = rt_mask(rt); 650 genmask = rt->rt_genmask; 651 size = rt_msg2(RTM_GET, &info, 0, w); 652 if (w->w_where && w->w_tmem) { 653 register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 654 655 rtm->rtm_flags = rt->rt_flags; 656 rtm->rtm_use = rt->rt_use; 657 rtm->rtm_rmx = rt->rt_rmx; 658 rtm->rtm_index = rt->rt_ifp->if_index; 659 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 660 rtm->rtm_addrs = info.rti_addrs; 661 if (error = copyout((caddr_t)rtm, w->w_where, size)) 662 w->w_where = NULL; 663 else 664 w->w_where += size; 665 } 666 return (error); 667 } 668 669 int 670 sysctl_iflist(af, w) 671 int af; 672 register struct walkarg *w; 673 { 674 register struct ifnet *ifp; 675 register struct ifaddr *ifa; 676 struct rt_addrinfo info; 677 int len, error = 0; 678 679 bzero((caddr_t)&info, sizeof(info)); 680 for (ifp = ifnet; ifp; ifp = ifp->if_next) { 681 if (w->w_arg && w->w_arg != ifp->if_index) 682 continue; 683 ifa = ifp->if_addrlist; 684 ifpaddr = ifa->ifa_addr; 685 len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w); 686 ifpaddr = 0; 687 if (w->w_where && w->w_tmem) { 688 register struct if_msghdr *ifm; 689 690 ifm = (struct if_msghdr *)w->w_tmem; 691 ifm->ifm_index = ifp->if_index; 692 ifm->ifm_flags = ifp->if_flags; 693 ifm->ifm_data = ifp->if_data; 694 ifm->ifm_addrs = info.rti_addrs; 695 if (error = copyout((caddr_t)ifm, w->w_where, len)) 696 return (error); 697 w->w_where += len; 698 } 699 while (ifa = ifa->ifa_next) { 700 if (af && af != ifa->ifa_addr->sa_family) 701 continue; 702 ifaaddr = ifa->ifa_addr; 703 netmask = ifa->ifa_netmask; 704 brdaddr = ifa->ifa_dstaddr; 705 len = rt_msg2(RTM_NEWADDR, &info, 0, w); 706 if (w->w_where && w->w_tmem) { 707 register struct ifa_msghdr *ifam; 708 709 ifam = (struct ifa_msghdr *)w->w_tmem; 710 ifam->ifam_index = ifa->ifa_ifp->if_index; 711 ifam->ifam_flags = ifa->ifa_flags; 712 ifam->ifam_metric = ifa->ifa_metric; 713 ifam->ifam_addrs = info.rti_addrs; 714 if (error = copyout(w->w_tmem, w->w_where, len)) 715 return (error); 716 w->w_where += len; 717 } 718 } 719 ifaaddr = netmask = brdaddr = 0; 720 } 721 return (0); 722 } 723 724 int 725 sysctl_rtable(name, namelen, where, given, new, newlen) 726 int *name; 727 int namelen; 728 caddr_t where; 729 size_t *given; 730 caddr_t *new; 731 size_t newlen; 732 { 733 register struct radix_node_head *rnh; 734 int i, s, error = EINVAL; 735 u_char af; 736 struct walkarg w; 737 738 if (new) 739 return (EPERM); 740 if (namelen != 3) 741 return (EINVAL); 742 af = name[0]; 743 Bzero(&w, sizeof(w)); 744 w.w_where = where; 745 w.w_given = *given; 746 w.w_needed = 0 - w.w_given; 747 w.w_op = name[1]; 748 w.w_arg = name[2]; 749 750 s = splnet(); 751 switch (w.w_op) { 752 753 case NET_RT_DUMP: 754 case NET_RT_FLAGS: 755 for (i = 1; i <= AF_MAX; i++) 756 if ((rnh = rt_tables[i]) && (af == 0 || af == i) && 757 (error = rnh->rnh_walktree(rnh, 758 sysctl_dumpentry, &w))) 759 break; 760 break; 761 762 case NET_RT_IFLIST: 763 error = sysctl_iflist(af, &w); 764 } 765 splx(s); 766 if (w.w_tmem) 767 free(w.w_tmem, M_RTABLE); 768 w.w_needed += w.w_given; 769 if (where) { 770 *given = w.w_where - where; 771 if (*given < w.w_needed) 772 return (ENOMEM); 773 } else { 774 *given = (11 * w.w_needed) / 10; 775 } 776 return (error); 777 } 778 779 /* 780 * Definitions of protocols supported in the ROUTE domain. 781 */ 782 783 extern struct domain routedomain; /* or at least forward */ 784 785 struct protosw routesw[] = { 786 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 787 raw_input, route_output, raw_ctlinput, 0, 788 route_usrreq, 789 raw_init, 0, 0, 0, 790 sysctl_rtable, 791 } 792 }; 793 794 struct domain routedomain = 795 { PF_ROUTE, "route", route_init, 0, 0, 796 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 797