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 8.6.1.1 (Berkeley) 02/23/95 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 void rt_xaddrs __P((caddr_t, caddr_t, struct rt_addrinfo *)); 37 void m_copyback __P((struct mbuf *, int, int, caddr_t)); 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 59 if (req == PRU_ATTACH) { 60 MALLOC(rp, struct rawcb *, sizeof(*rp), M_PCB, M_WAITOK); 61 if (so->so_pcb = (caddr_t)rp) 62 bzero(so->so_pcb, sizeof(*rp)); 63 64 } 65 if (req == PRU_DETACH && rp) { 66 int af = rp->rcb_proto.sp_protocol; 67 if (af == AF_INET) 68 route_cb.ip_count--; 69 else if (af == AF_NS) 70 route_cb.ns_count--; 71 else if (af == AF_ISO) 72 route_cb.iso_count--; 73 route_cb.any_count--; 74 } 75 s = splnet(); 76 error = raw_usrreq(so, req, m, nam, control); 77 rp = sotorawcb(so); 78 if (req == PRU_ATTACH && rp) { 79 int af = rp->rcb_proto.sp_protocol; 80 if (error) { 81 free((caddr_t)rp, M_PCB); 82 splx(s); 83 return (error); 84 } 85 if (af == AF_INET) 86 route_cb.ip_count++; 87 else if (af == AF_NS) 88 route_cb.ns_count++; 89 else if (af == AF_ISO) 90 route_cb.iso_count++; 91 rp->rcb_faddr = &route_src; 92 route_cb.any_count++; 93 soisconnected(so); 94 so->so_options |= SO_USELOOPBACK; 95 } 96 splx(s); 97 return (error); 98 } 99 100 /*ARGSUSED*/ 101 int 102 route_output(m, so) 103 register struct mbuf *m; 104 struct socket *so; 105 { 106 register struct rt_msghdr *rtm = 0; 107 register struct rtentry *rt = 0; 108 struct rtentry *saved_nrt = 0; 109 struct radix_node_head *rnh; 110 struct rt_addrinfo info; 111 int len, error = 0; 112 struct ifnet *ifp = 0; 113 struct ifaddr *ifa = 0; 114 115 #define senderr(e) { error = e; goto flush;} 116 if (m == 0 || ((m->m_len < sizeof(long)) && 117 (m = m_pullup(m, sizeof(long))) == 0)) 118 return (ENOBUFS); 119 if ((m->m_flags & M_PKTHDR) == 0) 120 panic("route_output"); 121 len = m->m_pkthdr.len; 122 if (len < sizeof(*rtm) || 123 len != mtod(m, struct rt_msghdr *)->rtm_msglen) { 124 dst = 0; 125 senderr(EINVAL); 126 } 127 R_Malloc(rtm, struct rt_msghdr *, len); 128 if (rtm == 0) { 129 dst = 0; 130 senderr(ENOBUFS); 131 } 132 m_copydata(m, 0, len, (caddr_t)rtm); 133 if (rtm->rtm_version != RTM_VERSION) { 134 dst = 0; 135 senderr(EPROTONOSUPPORT); 136 } 137 rtm->rtm_pid = curproc->p_pid; 138 info.rti_addrs = rtm->rtm_addrs; 139 rt_xaddrs((caddr_t)(rtm + 1), len + (caddr_t)rtm, &info); 140 info.rti_flags = rtm->rtm_flags; 141 if (dst == 0) 142 senderr(EINVAL); 143 if (genmask) { 144 struct radix_node *t; 145 t = rn_addmask((caddr_t)genmask, 0, 1); 146 if (t && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0) 147 genmask = (struct sockaddr *)(t->rn_key); 148 else 149 senderr(ENOBUFS); 150 } 151 switch (rtm->rtm_type) { 152 153 case RTM_ADDPKT: 154 case RTM_ADD: 155 if (gate == 0) 156 senderr(EINVAL); 157 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 158 if (error == 0 && saved_nrt) { 159 rt_setmetrics(rtm->rtm_inits, 160 &rtm->rtm_rmx, &saved_nrt->rt_rmx); 161 saved_nrt->rt_refcnt--; 162 saved_nrt->rt_genmask = genmask; 163 } 164 break; 165 166 case RTM_DELPKT: 167 case RTM_DELETE: 168 error = rtrequest1(rtm->rtm_type, &info, &saved_nrt); 169 if (error == 0) { 170 (rt = saved_nrt)->rt_refcnt++; 171 goto report; 172 } 173 break; 174 175 case RTM_GET: 176 case RTM_CHANGE: 177 case RTM_LOCK: 178 if ((rnh = rt_tables[dst->sa_family]) == 0) { 179 senderr(EAFNOSUPPORT); 180 } else if (rt = (struct rtentry *) 181 rnh->rnh_lookup(dst, netmask, rnh)) 182 rt->rt_refcnt++; 183 else 184 senderr(ESRCH); 185 switch(rtm->rtm_type) { 186 187 case RTM_GET: 188 report: 189 dst = rt_key(rt); 190 gate = rt->rt_gateway; 191 netmask = rt_mask(rt); 192 genmask = rt->rt_genmask; 193 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 194 if (ifp = rt->rt_ifp) { 195 ifpaddr = ifp->if_addrlist->ifa_addr; 196 ifaaddr = rt->rt_ifa->ifa_addr; 197 if (ifp->if_flags & IFF_POINTOPOINT) 198 brdaddr = rt->rt_ifa->ifa_dstaddr; 199 else 200 brdaddr = 0; 201 rtm->rtm_index = ifp->if_index; 202 } else { 203 ifpaddr = 0; 204 ifaaddr = 0; 205 } 206 } 207 len = rt_msg2(rtm->rtm_type, &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->rtm_type, &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 /* new gateway could require new ifaddr, ifp; 226 flags may also be different; ifp may be specified 227 by ll sockaddr when protocol address is ambiguous */ 228 if (error = rt_getifa(&info)) 229 senderr(error); 230 if (gate && rt_setgate(rt, rt_key(rt), gate)) 231 senderr(EDQUOT); 232 if (ifa = info.rti_ifa) { 233 register struct ifaddr *oifa = rt->rt_ifa; 234 if (oifa != ifa) { 235 if (oifa && oifa->ifa_rtrequest) 236 oifa->ifa_rtrequest(RTM_DELETE, 237 rt, &info); 238 IFAFREE(rt->rt_ifa); 239 rt->rt_ifa = ifa; 240 ifa->ifa_refcnt++; 241 rt->rt_ifp = info.rti_ifp; 242 } 243 } 244 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 245 &rt->rt_rmx); 246 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 247 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, &info); 248 if (genmask) 249 rt->rt_genmask = genmask; 250 /* 251 * Fall into 252 */ 253 case RTM_LOCK: 254 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 255 rt->rt_rmx.rmx_locks |= 256 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 257 break; 258 } 259 break; 260 261 default: 262 senderr(EOPNOTSUPP); 263 } 264 265 flush: 266 if (rtm) { 267 if (error) 268 rtm->rtm_errno = error; 269 else 270 rtm->rtm_flags |= RTF_DONE; 271 } 272 if (rt) 273 rtfree(rt); 274 { 275 register struct rawcb *rp = 0; 276 /* 277 * Check to see if we don't want our own messages. 278 */ 279 if ((so->so_options & SO_USELOOPBACK) == 0) { 280 if (route_cb.any_count <= 1) { 281 if (rtm) 282 Free(rtm); 283 m_freem(m); 284 return (error); 285 } 286 /* There is another listener, so construct message */ 287 rp = sotorawcb(so); 288 } 289 if (rtm) { 290 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 291 Free(rtm); 292 } 293 if (rp) 294 rp->rcb_proto.sp_family = 0; /* Avoid us */ 295 if (dst) 296 route_proto.sp_protocol = dst->sa_family; 297 raw_input(m, &route_proto, &route_src, &route_dst); 298 if (rp) 299 rp->rcb_proto.sp_family = PF_ROUTE; 300 } 301 return (error); 302 } 303 304 void 305 rt_setmetrics(which, in, out) 306 u_long which; 307 register struct rt_metrics *in, *out; 308 { 309 #define metric(f, e) if (which & (f)) out->e = in->e; 310 metric(RTV_RPIPE, rmx_recvpipe); 311 metric(RTV_SPIPE, rmx_sendpipe); 312 metric(RTV_SSTHRESH, rmx_ssthresh); 313 metric(RTV_RTT, rmx_rtt); 314 metric(RTV_RTTVAR, rmx_rttvar); 315 metric(RTV_HOPCOUNT, rmx_hopcount); 316 metric(RTV_MTU, rmx_mtu); 317 metric(RTV_EXPIRE, rmx_expire); 318 #undef metric 319 } 320 321 #define ROUNDUP(a) \ 322 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 323 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 324 325 void 326 rt_xaddrs(cp, cplim, rtinfo) 327 register caddr_t cp, cplim; 328 register struct rt_addrinfo *rtinfo; 329 { 330 register struct sockaddr *sa; 331 register int i, addrs = rtinfo->rti_addrs; 332 333 bzero(rtinfo, sizeof(*rtinfo)); 334 rtinfo->rti_addrs = addrs; 335 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 336 if ((addrs & (1 << i)) == 0) 337 continue; 338 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 339 ADVANCE(cp, sa); 340 } 341 rtinfo->rti_pkthdr = cp; 342 } 343 344 /* 345 * Copy data from a buffer back into the indicated mbuf chain, 346 * starting "off" bytes from the beginning, extending the mbuf 347 * chain if necessary. 348 */ 349 void 350 m_copyback(m0, off, len, cp) 351 struct mbuf *m0; 352 register int off; 353 register int len; 354 caddr_t cp; 355 { 356 register int mlen; 357 register struct mbuf *m = m0, *n; 358 int totlen = 0; 359 360 if (m0 == 0) 361 return; 362 while (off > (mlen = m->m_len)) { 363 off -= mlen; 364 totlen += mlen; 365 if (m->m_next == 0) { 366 n = m_getclr(M_DONTWAIT, m->m_type); 367 if (n == 0) 368 goto out; 369 n->m_len = min(MLEN, len + off); 370 m->m_next = n; 371 } 372 m = m->m_next; 373 } 374 while (len > 0) { 375 mlen = min (m->m_len - off, len); 376 bcopy(cp, off + mtod(m, caddr_t), (unsigned)mlen); 377 cp += mlen; 378 len -= mlen; 379 mlen += off; 380 off = 0; 381 totlen += mlen; 382 if (len == 0) 383 break; 384 if (m->m_next == 0) { 385 n = m_get(M_DONTWAIT, m->m_type); 386 if (n == 0) 387 break; 388 n->m_len = min(MLEN, len); 389 m->m_next = n; 390 } 391 m = m->m_next; 392 } 393 out: if (((m = m0)->m_flags & M_PKTHDR) && (m->m_pkthdr.len < totlen)) 394 m->m_pkthdr.len = totlen; 395 } 396 397 static struct mbuf * 398 rt_msg1(type, rtinfo) 399 int type; 400 register struct rt_addrinfo *rtinfo; 401 { 402 register struct rt_msghdr *rtm; 403 register struct mbuf *m; 404 register int i; 405 register struct sockaddr *sa; 406 int len, dlen; 407 408 m = m_gethdr(M_DONTWAIT, MT_DATA); 409 if (m == 0) 410 return (m); 411 switch (type) { 412 413 case RTM_DELADDR: 414 case RTM_NEWADDR: 415 len = sizeof(struct ifa_msghdr); 416 break; 417 418 case RTM_IFINFO: 419 len = sizeof(struct if_msghdr); 420 break; 421 422 default: 423 len = sizeof(struct rt_msghdr); 424 } 425 if (len > MHLEN) 426 panic("rt_msg1"); 427 m->m_pkthdr.len = m->m_len = len; 428 m->m_pkthdr.rcvif = 0; 429 rtm = mtod(m, struct rt_msghdr *); 430 bzero((caddr_t)rtm, len); 431 for (i = 0; i < RTAX_MAX; i++) { 432 if ((sa = rtinfo->rti_info[i]) == NULL) 433 continue; 434 rtinfo->rti_addrs |= (1 << i); 435 dlen = ROUNDUP(sa->sa_len); 436 m_copyback(m, len, dlen, (caddr_t)sa); 437 len += dlen; 438 } 439 if (m->m_pkthdr.len != len) { 440 m_freem(m); 441 return (NULL); 442 } 443 rtm->rtm_msglen = len; 444 rtm->rtm_version = RTM_VERSION; 445 rtm->rtm_type = type; 446 return (m); 447 } 448 449 static int 450 rt_msg2(type, rtinfo, cp, w) 451 int type; 452 register struct rt_addrinfo *rtinfo; 453 caddr_t cp; 454 struct walkarg *w; 455 { 456 register int i; 457 int len, dlen, second_time = 0; 458 caddr_t cp0; 459 460 rtinfo->rti_addrs = 0; 461 again: 462 switch (type) { 463 464 case RTM_DELADDR: 465 case RTM_NEWADDR: 466 len = sizeof(struct ifa_msghdr); 467 break; 468 469 case RTM_IFINFO: 470 len = sizeof(struct if_msghdr); 471 break; 472 473 default: 474 len = sizeof(struct rt_msghdr); 475 } 476 if (cp0 = cp) 477 cp += len; 478 for (i = 0; i < RTAX_MAX; i++) { 479 register struct sockaddr *sa; 480 481 if ((sa = rtinfo->rti_info[i]) == 0) 482 continue; 483 rtinfo->rti_addrs |= (1 << i); 484 dlen = ROUNDUP(sa->sa_len); 485 if (cp) { 486 bcopy((caddr_t)sa, cp, (unsigned)dlen); 487 cp += dlen; 488 } 489 len += dlen; 490 } 491 if (cp == 0 && w != NULL && !second_time) { 492 register struct walkarg *rw = w; 493 494 rw->w_needed += len; 495 if (rw->w_needed <= 0 && rw->w_where) { 496 if (rw->w_tmemsize < len) { 497 if (rw->w_tmem) 498 free(rw->w_tmem, M_RTABLE); 499 if (rw->w_tmem = (caddr_t) 500 malloc(len, M_RTABLE, M_NOWAIT)) 501 rw->w_tmemsize = len; 502 } 503 if (rw->w_tmem) { 504 cp = rw->w_tmem; 505 second_time = 1; 506 goto again; 507 } else 508 rw->w_where = 0; 509 } 510 } 511 if (cp) { 512 register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 513 514 rtm->rtm_version = RTM_VERSION; 515 rtm->rtm_type = type; 516 rtm->rtm_msglen = len; 517 } 518 return (len); 519 } 520 521 /* 522 * This routine is called to generate a message from the routing 523 * socket indicating that a redirect has occured, a routing lookup 524 * has failed, or that a protocol has detected timeouts to a particular 525 * destination. 526 */ 527 void 528 rt_missmsg(type, rtinfo, flags, error) 529 int type, flags, error; 530 register struct rt_addrinfo *rtinfo; 531 { 532 register struct rt_msghdr *rtm; 533 register struct mbuf *m; 534 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 535 536 if (route_cb.any_count == 0) 537 return; 538 m = rt_msg1(type, rtinfo); 539 if (m == 0) 540 return; 541 rtm = mtod(m, struct rt_msghdr *); 542 rtm->rtm_flags = RTF_DONE | flags; 543 rtm->rtm_errno = error; 544 rtm->rtm_addrs = rtinfo->rti_addrs; 545 route_proto.sp_protocol = sa ? sa->sa_family : 0; 546 raw_input(m, &route_proto, &route_src, &route_dst); 547 } 548 549 /* 550 * This routine is called to generate a message from the routing 551 * socket indicating that the status of a network interface has changed. 552 */ 553 void 554 rt_ifmsg(ifp) 555 register struct ifnet *ifp; 556 { 557 register struct if_msghdr *ifm; 558 struct mbuf *m; 559 struct rt_addrinfo info; 560 561 if (route_cb.any_count == 0) 562 return; 563 bzero((caddr_t)&info, sizeof(info)); 564 m = rt_msg1(RTM_IFINFO, &info); 565 if (m == 0) 566 return; 567 ifm = mtod(m, struct if_msghdr *); 568 ifm->ifm_index = ifp->if_index; 569 ifm->ifm_flags = ifp->if_flags; 570 ifm->ifm_data = ifp->if_data; 571 ifm->ifm_addrs = 0; 572 route_proto.sp_protocol = 0; 573 raw_input(m, &route_proto, &route_src, &route_dst); 574 } 575 576 /* 577 * This is called to generate messages from the routing socket 578 * indicating a network interface has had addresses associated with it. 579 * if we ever reverse the logic and replace messages TO the routing 580 * socket indicate a request to configure interfaces, then it will 581 * be unnecessary as the routing socket will automatically generate 582 * copies of it. 583 */ 584 void 585 rt_newaddrmsg(cmd, ifa, error, rt) 586 int cmd, error; 587 register struct ifaddr *ifa; 588 register struct rtentry *rt; 589 { 590 struct rt_addrinfo info; 591 struct sockaddr *sa; 592 int pass; 593 struct mbuf *m; 594 struct ifnet *ifp = ifa->ifa_ifp; 595 596 if (route_cb.any_count == 0) 597 return; 598 for (pass = 1; pass < 3; pass++) { 599 bzero((caddr_t)&info, sizeof(info)); 600 if ((cmd == RTM_ADD && pass == 1) || 601 (cmd == RTM_DELETE && pass == 2)) { 602 register struct ifa_msghdr *ifam; 603 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 604 605 ifaaddr = sa = ifa->ifa_addr; 606 ifpaddr = ifp->if_addrlist->ifa_addr; 607 netmask = ifa->ifa_netmask; 608 brdaddr = ifa->ifa_dstaddr; 609 if ((m = rt_msg1(ncmd, &info)) == NULL) 610 continue; 611 ifam = mtod(m, struct ifa_msghdr *); 612 ifam->ifam_index = ifp->if_index; 613 ifam->ifam_metric = ifa->ifa_metric; 614 ifam->ifam_flags = ifa->ifa_flags; 615 ifam->ifam_addrs = info.rti_addrs; 616 } 617 if ((cmd == RTM_ADD && pass == 2) || 618 (cmd == RTM_DELETE && pass == 1)) { 619 register struct rt_msghdr *rtm; 620 621 if (rt == 0) 622 continue; 623 netmask = rt_mask(rt); 624 dst = sa = rt_key(rt); 625 gate = rt->rt_gateway; 626 if ((m = rt_msg1(cmd, &info)) == NULL) 627 continue; 628 rtm = mtod(m, struct rt_msghdr *); 629 rtm->rtm_index = ifp->if_index; 630 rtm->rtm_flags |= rt->rt_flags; 631 rtm->rtm_errno = error; 632 rtm->rtm_addrs = info.rti_addrs; 633 } 634 route_proto.sp_protocol = sa ? sa->sa_family : 0; 635 raw_input(m, &route_proto, &route_src, &route_dst); 636 } 637 } 638 639 /* 640 * This is used in dumping the kernel table via sysctl(). 641 */ 642 int 643 sysctl_dumpentry(rn, w) 644 struct radix_node *rn; 645 register struct walkarg *w; 646 { 647 register struct rtentry *rt = (struct rtentry *)rn; 648 int error = 0, size; 649 struct rt_addrinfo info; 650 651 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 652 return 0; 653 bzero((caddr_t)&info, sizeof(info)); 654 dst = rt_key(rt); 655 gate = rt->rt_gateway; 656 netmask = rt_mask(rt); 657 genmask = rt->rt_genmask; 658 if (rt->rt_ifp) { 659 ifpaddr = rt->rt_ifp->if_addrlist->ifa_addr; 660 ifaaddr = rt->rt_ifa->ifa_addr; 661 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 662 brdaddr = rt->rt_ifa->ifa_dstaddr; 663 } 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 int len, error = 0; 691 692 bzero((caddr_t)&info, sizeof(info)); 693 for (ifp = ifnet; ifp; ifp = ifp->if_next) { 694 if (w->w_arg && w->w_arg != ifp->if_index) 695 continue; 696 ifa = ifp->if_addrlist; 697 ifpaddr = ifa->ifa_addr; 698 len = rt_msg2(RTM_IFINFO, &info, (caddr_t)0, w); 699 ifpaddr = 0; 700 if (w->w_where && w->w_tmem) { 701 register struct if_msghdr *ifm; 702 703 ifm = (struct if_msghdr *)w->w_tmem; 704 ifm->ifm_index = ifp->if_index; 705 ifm->ifm_flags = ifp->if_flags; 706 ifm->ifm_data = ifp->if_data; 707 ifm->ifm_addrs = info.rti_addrs; 708 if (error = copyout((caddr_t)ifm, w->w_where, len)) 709 return (error); 710 w->w_where += len; 711 } 712 while (ifa = ifa->ifa_next) { 713 if (af && af != ifa->ifa_addr->sa_family) 714 continue; 715 ifaaddr = ifa->ifa_addr; 716 netmask = ifa->ifa_netmask; 717 brdaddr = ifa->ifa_dstaddr; 718 len = rt_msg2(RTM_NEWADDR, &info, 0, w); 719 if (w->w_where && w->w_tmem) { 720 register struct ifa_msghdr *ifam; 721 722 ifam = (struct ifa_msghdr *)w->w_tmem; 723 ifam->ifam_index = ifa->ifa_ifp->if_index; 724 ifam->ifam_flags = ifa->ifa_flags; 725 ifam->ifam_metric = ifa->ifa_metric; 726 ifam->ifam_addrs = info.rti_addrs; 727 if (error = copyout(w->w_tmem, w->w_where, len)) 728 return (error); 729 w->w_where += len; 730 } 731 } 732 ifaaddr = netmask = brdaddr = 0; 733 } 734 return (0); 735 } 736 737 int 738 sysctl_rtable(name, namelen, where, given, new, newlen) 739 int *name; 740 int namelen; 741 caddr_t where; 742 size_t *given; 743 caddr_t *new; 744 size_t newlen; 745 { 746 register struct radix_node_head *rnh; 747 int i, s, error = EINVAL; 748 u_char af; 749 struct walkarg w; 750 751 if (new) 752 return (EPERM); 753 if (namelen != 3) 754 return (EINVAL); 755 af = name[0]; 756 Bzero(&w, sizeof(w)); 757 w.w_where = where; 758 w.w_given = *given; 759 w.w_needed = 0 - w.w_given; 760 w.w_op = name[1]; 761 w.w_arg = name[2]; 762 763 s = splnet(); 764 switch (w.w_op) { 765 766 case NET_RT_DUMP: 767 case NET_RT_FLAGS: 768 for (i = 1; i <= AF_MAX; i++) 769 if ((rnh = rt_tables[i]) && (af == 0 || af == i) && 770 (error = rnh->rnh_walktree(rnh, 771 sysctl_dumpentry, &w))) 772 break; 773 break; 774 775 case NET_RT_IFLIST: 776 error = sysctl_iflist(af, &w); 777 } 778 splx(s); 779 if (w.w_tmem) 780 free(w.w_tmem, M_RTABLE); 781 w.w_needed += w.w_given; 782 if (where) { 783 *given = w.w_where - where; 784 if (*given < w.w_needed) 785 return (ENOMEM); 786 } else { 787 *given = (11 * w.w_needed) / 10; 788 } 789 return (error); 790 } 791 792 /* 793 * Definitions of protocols supported in the ROUTE domain. 794 */ 795 796 extern struct domain routedomain; /* or at least forward */ 797 798 struct protosw routesw[] = { 799 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 800 raw_input, route_output, raw_ctlinput, 0, 801 route_usrreq, 802 raw_init, 0, 0, 0, 803 sysctl_rtable, 804 } 805 }; 806 807 struct domain routedomain = 808 { PF_ROUTE, "route", route_init, 0, 0, 809 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 810