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 (Berkeley) 02/11/95 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 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, &saved_nrt); 167 if (error == 0) { 168 (rt = saved_nrt)->rt_refcnt++; 169 goto report; 170 } 171 break; 172 173 case RTM_GET: 174 case RTM_CHANGE: 175 case RTM_LOCK: 176 if ((rnh = rt_tables[dst->sa_family]) == 0) { 177 senderr(EAFNOSUPPORT); 178 } else if (rt = (struct rtentry *) 179 rnh->rnh_lookup(dst, netmask, rnh)) 180 rt->rt_refcnt++; 181 else 182 senderr(ESRCH); 183 switch(rtm->rtm_type) { 184 185 case RTM_GET: 186 report: 187 dst = rt_key(rt); 188 gate = rt->rt_gateway; 189 netmask = rt_mask(rt); 190 genmask = rt->rt_genmask; 191 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 192 if (ifp = rt->rt_ifp) { 193 ifpaddr = ifp->if_addrlist->ifa_addr; 194 ifaaddr = rt->rt_ifa->ifa_addr; 195 if (ifp->if_flags & IFF_POINTOPOINT) 196 brdaddr = rt->rt_ifa->ifa_dstaddr; 197 else 198 brdaddr = 0; 199 rtm->rtm_index = ifp->if_index; 200 } else { 201 ifpaddr = 0; 202 ifaaddr = 0; 203 } 204 } 205 len = rt_msg2(rtm->rtm_type, &info, (caddr_t)0, 206 (struct walkarg *)0); 207 if (len > rtm->rtm_msglen) { 208 struct rt_msghdr *new_rtm; 209 R_Malloc(new_rtm, struct rt_msghdr *, len); 210 if (new_rtm == 0) 211 senderr(ENOBUFS); 212 Bcopy(rtm, new_rtm, rtm->rtm_msglen); 213 Free(rtm); rtm = new_rtm; 214 } 215 (void)rt_msg2(rtm->rtm_type, &info, (caddr_t)rtm, 216 (struct walkarg *)0); 217 rtm->rtm_flags = rt->rt_flags; 218 rtm->rtm_rmx = rt->rt_rmx; 219 rtm->rtm_addrs = info.rti_addrs; 220 break; 221 222 case RTM_CHANGE: 223 if (gate && rt_setgate(rt, rt_key(rt), gate)) 224 senderr(EDQUOT); 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 (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) && 229 (ifp = ifa->ifa_ifp)) 230 ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate, 231 ifp); 232 else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) || 233 (ifa = ifa_ifwithroute(rt->rt_flags, 234 rt_key(rt), gate))) 235 ifp = ifa->ifa_ifp; 236 if (ifa) { 237 register struct ifaddr *oifa = rt->rt_ifa; 238 if (oifa != ifa) { 239 if (oifa && oifa->ifa_rtrequest) 240 oifa->ifa_rtrequest(RTM_DELETE, 241 rt, gate); 242 IFAFREE(rt->rt_ifa); 243 rt->rt_ifa = ifa; 244 ifa->ifa_refcnt++; 245 rt->rt_ifp = ifp; 246 } 247 } 248 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 249 &rt->rt_rmx); 250 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 251 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate); 252 if (genmask) 253 rt->rt_genmask = genmask; 254 /* 255 * Fall into 256 */ 257 case RTM_LOCK: 258 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 259 rt->rt_rmx.rmx_locks |= 260 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 261 break; 262 } 263 break; 264 265 default: 266 senderr(EOPNOTSUPP); 267 } 268 269 flush: 270 if (rtm) { 271 if (error) 272 rtm->rtm_errno = error; 273 else 274 rtm->rtm_flags |= RTF_DONE; 275 } 276 if (rt) 277 rtfree(rt); 278 { 279 register struct rawcb *rp = 0; 280 /* 281 * Check to see if we don't want our own messages. 282 */ 283 if ((so->so_options & SO_USELOOPBACK) == 0) { 284 if (route_cb.any_count <= 1) { 285 if (rtm) 286 Free(rtm); 287 m_freem(m); 288 return (error); 289 } 290 /* There is another listener, so construct message */ 291 rp = sotorawcb(so); 292 } 293 if (rtm) { 294 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 295 Free(rtm); 296 } 297 if (rp) 298 rp->rcb_proto.sp_family = 0; /* Avoid us */ 299 if (dst) 300 route_proto.sp_protocol = dst->sa_family; 301 raw_input(m, &route_proto, &route_src, &route_dst); 302 if (rp) 303 rp->rcb_proto.sp_family = PF_ROUTE; 304 } 305 return (error); 306 } 307 308 void 309 rt_setmetrics(which, in, out) 310 u_long which; 311 register struct rt_metrics *in, *out; 312 { 313 #define metric(f, e) if (which & (f)) out->e = in->e; 314 metric(RTV_RPIPE, rmx_recvpipe); 315 metric(RTV_SPIPE, rmx_sendpipe); 316 metric(RTV_SSTHRESH, rmx_ssthresh); 317 metric(RTV_RTT, rmx_rtt); 318 metric(RTV_RTTVAR, rmx_rttvar); 319 metric(RTV_HOPCOUNT, rmx_hopcount); 320 metric(RTV_MTU, rmx_mtu); 321 metric(RTV_EXPIRE, rmx_expire); 322 #undef metric 323 } 324 325 #define ROUNDUP(a) \ 326 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 327 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 328 329 static void 330 rt_xaddrs(cp, cplim, rtinfo) 331 register caddr_t cp, cplim; 332 register struct rt_addrinfo *rtinfo; 333 { 334 register struct sockaddr *sa; 335 register int i; 336 337 bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info)); 338 for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) { 339 if ((rtinfo->rti_addrs & (1 << i)) == 0) 340 continue; 341 rtinfo->rti_info[i] = sa = (struct sockaddr *)cp; 342 ADVANCE(cp, sa); 343 } 344 } 345 346 /* 347 * Copy data from a buffer back into the indicated mbuf chain, 348 * starting "off" bytes from the beginning, extending the mbuf 349 * chain if necessary. 350 */ 351 void 352 m_copyback(m0, off, len, cp) 353 struct mbuf *m0; 354 register int off; 355 register int len; 356 caddr_t cp; 357 { 358 register int mlen; 359 register struct mbuf *m = m0, *n; 360 int totlen = 0; 361 362 if (m0 == 0) 363 return; 364 while (off > (mlen = m->m_len)) { 365 off -= mlen; 366 totlen += mlen; 367 if (m->m_next == 0) { 368 n = m_getclr(M_DONTWAIT, m->m_type); 369 if (n == 0) 370 goto out; 371 n->m_len = min(MLEN, len + off); 372 m->m_next = n; 373 } 374 m = m->m_next; 375 } 376 while (len > 0) { 377 mlen = min (m->m_len - off, len); 378 bcopy(cp, off + mtod(m, caddr_t), (unsigned)mlen); 379 cp += mlen; 380 len -= mlen; 381 mlen += off; 382 off = 0; 383 totlen += mlen; 384 if (len == 0) 385 break; 386 if (m->m_next == 0) { 387 n = m_get(M_DONTWAIT, m->m_type); 388 if (n == 0) 389 break; 390 n->m_len = min(MLEN, len); 391 m->m_next = n; 392 } 393 m = m->m_next; 394 } 395 out: if (((m = m0)->m_flags & M_PKTHDR) && (m->m_pkthdr.len < totlen)) 396 m->m_pkthdr.len = totlen; 397 } 398 399 static struct mbuf * 400 rt_msg1(type, rtinfo) 401 int type; 402 register struct rt_addrinfo *rtinfo; 403 { 404 register struct rt_msghdr *rtm; 405 register struct mbuf *m; 406 register int i; 407 register struct sockaddr *sa; 408 int len, dlen; 409 410 m = m_gethdr(M_DONTWAIT, MT_DATA); 411 if (m == 0) 412 return (m); 413 switch (type) { 414 415 case RTM_DELADDR: 416 case RTM_NEWADDR: 417 len = sizeof(struct ifa_msghdr); 418 break; 419 420 case RTM_IFINFO: 421 len = sizeof(struct if_msghdr); 422 break; 423 424 default: 425 len = sizeof(struct rt_msghdr); 426 } 427 if (len > MHLEN) 428 panic("rt_msg1"); 429 m->m_pkthdr.len = m->m_len = len; 430 m->m_pkthdr.rcvif = 0; 431 rtm = mtod(m, struct rt_msghdr *); 432 bzero((caddr_t)rtm, len); 433 for (i = 0; i < RTAX_MAX; i++) { 434 if ((sa = rtinfo->rti_info[i]) == NULL) 435 continue; 436 rtinfo->rti_addrs |= (1 << i); 437 dlen = ROUNDUP(sa->sa_len); 438 m_copyback(m, len, dlen, (caddr_t)sa); 439 len += dlen; 440 } 441 if (m->m_pkthdr.len != len) { 442 m_freem(m); 443 return (NULL); 444 } 445 rtm->rtm_msglen = len; 446 rtm->rtm_version = RTM_VERSION; 447 rtm->rtm_type = type; 448 return (m); 449 } 450 451 static int 452 rt_msg2(type, rtinfo, cp, w) 453 int type; 454 register struct rt_addrinfo *rtinfo; 455 caddr_t cp; 456 struct walkarg *w; 457 { 458 register int i; 459 int len, dlen, second_time = 0; 460 caddr_t cp0; 461 462 rtinfo->rti_addrs = 0; 463 again: 464 switch (type) { 465 466 case RTM_DELADDR: 467 case RTM_NEWADDR: 468 len = sizeof(struct ifa_msghdr); 469 break; 470 471 case RTM_IFINFO: 472 len = sizeof(struct if_msghdr); 473 break; 474 475 default: 476 len = sizeof(struct rt_msghdr); 477 } 478 if (cp0 = cp) 479 cp += len; 480 for (i = 0; i < RTAX_MAX; i++) { 481 register struct sockaddr *sa; 482 483 if ((sa = rtinfo->rti_info[i]) == 0) 484 continue; 485 rtinfo->rti_addrs |= (1 << i); 486 dlen = ROUNDUP(sa->sa_len); 487 if (cp) { 488 bcopy((caddr_t)sa, cp, (unsigned)dlen); 489 cp += dlen; 490 } 491 len += dlen; 492 } 493 if (cp == 0 && w != NULL && !second_time) { 494 register struct walkarg *rw = w; 495 496 rw->w_needed += len; 497 if (rw->w_needed <= 0 && rw->w_where) { 498 if (rw->w_tmemsize < len) { 499 if (rw->w_tmem) 500 free(rw->w_tmem, M_RTABLE); 501 if (rw->w_tmem = (caddr_t) 502 malloc(len, M_RTABLE, M_NOWAIT)) 503 rw->w_tmemsize = len; 504 } 505 if (rw->w_tmem) { 506 cp = rw->w_tmem; 507 second_time = 1; 508 goto again; 509 } else 510 rw->w_where = 0; 511 } 512 } 513 if (cp) { 514 register struct rt_msghdr *rtm = (struct rt_msghdr *)cp0; 515 516 rtm->rtm_version = RTM_VERSION; 517 rtm->rtm_type = type; 518 rtm->rtm_msglen = len; 519 } 520 return (len); 521 } 522 523 /* 524 * This routine is called to generate a message from the routing 525 * socket indicating that a redirect has occured, a routing lookup 526 * has failed, or that a protocol has detected timeouts to a particular 527 * destination. 528 */ 529 void 530 rt_missmsg(type, rtinfo, flags, error) 531 int type, flags, error; 532 register struct rt_addrinfo *rtinfo; 533 { 534 register struct rt_msghdr *rtm; 535 register struct mbuf *m; 536 struct sockaddr *sa = rtinfo->rti_info[RTAX_DST]; 537 538 if (route_cb.any_count == 0) 539 return; 540 m = rt_msg1(type, rtinfo); 541 if (m == 0) 542 return; 543 rtm = mtod(m, struct rt_msghdr *); 544 rtm->rtm_flags = RTF_DONE | flags; 545 rtm->rtm_errno = error; 546 rtm->rtm_addrs = rtinfo->rti_addrs; 547 route_proto.sp_protocol = sa ? sa->sa_family : 0; 548 raw_input(m, &route_proto, &route_src, &route_dst); 549 } 550 551 /* 552 * This routine is called to generate a message from the routing 553 * socket indicating that the status of a network interface has changed. 554 */ 555 void 556 rt_ifmsg(ifp) 557 register struct ifnet *ifp; 558 { 559 register struct if_msghdr *ifm; 560 struct mbuf *m; 561 struct rt_addrinfo info; 562 563 if (route_cb.any_count == 0) 564 return; 565 bzero((caddr_t)&info, sizeof(info)); 566 m = rt_msg1(RTM_IFINFO, &info); 567 if (m == 0) 568 return; 569 ifm = mtod(m, struct if_msghdr *); 570 ifm->ifm_index = ifp->if_index; 571 ifm->ifm_flags = ifp->if_flags; 572 ifm->ifm_data = ifp->if_data; 573 ifm->ifm_addrs = 0; 574 route_proto.sp_protocol = 0; 575 raw_input(m, &route_proto, &route_src, &route_dst); 576 } 577 578 /* 579 * This is called to generate messages from the routing socket 580 * indicating a network interface has had addresses associated with it. 581 * if we ever reverse the logic and replace messages TO the routing 582 * socket indicate a request to configure interfaces, then it will 583 * be unnecessary as the routing socket will automatically generate 584 * copies of it. 585 */ 586 void 587 rt_newaddrmsg(cmd, ifa, error, rt) 588 int cmd, error; 589 register struct ifaddr *ifa; 590 register struct rtentry *rt; 591 { 592 struct rt_addrinfo info; 593 struct sockaddr *sa; 594 int pass; 595 struct mbuf *m; 596 struct ifnet *ifp = ifa->ifa_ifp; 597 598 if (route_cb.any_count == 0) 599 return; 600 for (pass = 1; pass < 3; pass++) { 601 bzero((caddr_t)&info, sizeof(info)); 602 if ((cmd == RTM_ADD && pass == 1) || 603 (cmd == RTM_DELETE && pass == 2)) { 604 register struct ifa_msghdr *ifam; 605 int ncmd = cmd == RTM_ADD ? RTM_NEWADDR : RTM_DELADDR; 606 607 ifaaddr = sa = ifa->ifa_addr; 608 ifpaddr = ifp->if_addrlist->ifa_addr; 609 netmask = ifa->ifa_netmask; 610 brdaddr = ifa->ifa_dstaddr; 611 if ((m = rt_msg1(ncmd, &info)) == NULL) 612 continue; 613 ifam = mtod(m, struct ifa_msghdr *); 614 ifam->ifam_index = ifp->if_index; 615 ifam->ifam_metric = ifa->ifa_metric; 616 ifam->ifam_flags = ifa->ifa_flags; 617 ifam->ifam_addrs = info.rti_addrs; 618 } 619 if ((cmd == RTM_ADD && pass == 2) || 620 (cmd == RTM_DELETE && pass == 1)) { 621 register struct rt_msghdr *rtm; 622 623 if (rt == 0) 624 continue; 625 netmask = rt_mask(rt); 626 dst = sa = rt_key(rt); 627 gate = rt->rt_gateway; 628 if ((m = rt_msg1(cmd, &info)) == NULL) 629 continue; 630 rtm = mtod(m, struct rt_msghdr *); 631 rtm->rtm_index = ifp->if_index; 632 rtm->rtm_flags |= rt->rt_flags; 633 rtm->rtm_errno = error; 634 rtm->rtm_addrs = info.rti_addrs; 635 } 636 route_proto.sp_protocol = sa ? sa->sa_family : 0; 637 raw_input(m, &route_proto, &route_src, &route_dst); 638 } 639 } 640 641 /* 642 * This is used in dumping the kernel table via sysctl(). 643 */ 644 int 645 sysctl_dumpentry(rn, w) 646 struct radix_node *rn; 647 register struct walkarg *w; 648 { 649 register struct rtentry *rt = (struct rtentry *)rn; 650 int error = 0, size; 651 struct rt_addrinfo info; 652 653 if (w->w_op == NET_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 654 return 0; 655 bzero((caddr_t)&info, sizeof(info)); 656 dst = rt_key(rt); 657 gate = rt->rt_gateway; 658 netmask = rt_mask(rt); 659 genmask = rt->rt_genmask; 660 if (rt->rt_ifp) { 661 ifpaddr = rt->rt_ifp->if_addrlist->ifa_addr; 662 ifaaddr = rt->rt_ifa->ifa_addr; 663 if (rt->rt_ifp->if_flags & IFF_POINTOPOINT) 664 brdaddr = rt->rt_ifa->ifa_dstaddr; 665 } 666 size = rt_msg2(RTM_GET, &info, 0, w); 667 if (w->w_where && w->w_tmem) { 668 register struct rt_msghdr *rtm = (struct rt_msghdr *)w->w_tmem; 669 670 rtm->rtm_flags = rt->rt_flags; 671 rtm->rtm_use = rt->rt_use; 672 rtm->rtm_rmx = rt->rt_rmx; 673 rtm->rtm_index = rt->rt_ifp->if_index; 674 rtm->rtm_errno = rtm->rtm_pid = rtm->rtm_seq = 0; 675 rtm->rtm_addrs = info.rti_addrs; 676 if (error = copyout((caddr_t)rtm, w->w_where, size)) 677 w->w_where = NULL; 678 else 679 w->w_where += size; 680 } 681 return (error); 682 } 683 684 int 685 sysctl_iflist(af, w) 686 int af; 687 register struct walkarg *w; 688 { 689 register struct ifnet *ifp; 690 register struct ifaddr *ifa; 691 struct rt_addrinfo info; 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