rtsock.c revision 1.8
1 /* 2 * Copyright (c) 1988, 1991 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: @(#)rtsock.c 7.18 (Berkeley) 6/27/91 34 * $Id: rtsock.c,v 1.8 1994/05/07 04:26:58 cgd Exp $ 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/mbuf.h> 40 #include <sys/proc.h> 41 #include <sys/socket.h> 42 #include <sys/socketvar.h> 43 #include <sys/domain.h> 44 #include <sys/protosw.h> 45 46 #include <net/if.h> 47 #include <net/route.h> 48 #include <net/raw_cb.h> 49 50 #include <machine/cpu.h> 51 52 struct sockaddr route_dst = { 2, PF_ROUTE, }; 53 struct sockaddr route_src = { 2, PF_ROUTE, }; 54 struct sockproto route_proto = { PF_ROUTE, }; 55 56 /*ARGSUSED*/ 57 route_usrreq(so, req, m, nam, control) 58 register struct socket *so; 59 int req; 60 struct mbuf *m, *nam, *control; 61 { 62 register int error = 0; 63 register struct rawcb *rp = sotorawcb(so); 64 int s; 65 if (req == PRU_ATTACH) { 66 MALLOC(rp, struct rawcb *, sizeof(*rp), M_PCB, M_WAITOK); 67 if (so->so_pcb = (caddr_t)rp) 68 bzero(so->so_pcb, sizeof(*rp)); 69 70 } 71 if (req == PRU_DETACH && rp) { 72 int af = rp->rcb_proto.sp_protocol; 73 if (af == AF_INET) 74 route_cb.ip_count--; 75 else if (af == AF_NS) 76 route_cb.ns_count--; 77 else if (af == AF_ISO) 78 route_cb.iso_count--; 79 route_cb.any_count--; 80 } 81 s = splnet(); 82 error = raw_usrreq(so, req, m, nam, control); 83 rp = sotorawcb(so); 84 if (req == PRU_ATTACH && rp) { 85 int af = rp->rcb_proto.sp_protocol; 86 if (error) { 87 free((caddr_t)rp, M_PCB); 88 splx(s); 89 return (error); 90 } 91 if (af == AF_INET) 92 route_cb.ip_count++; 93 else if (af == AF_NS) 94 route_cb.ns_count++; 95 else if (af == AF_ISO) 96 route_cb.iso_count++; 97 rp->rcb_faddr = &route_src; 98 route_cb.any_count++; 99 soisconnected(so); 100 so->so_options |= SO_USELOOPBACK; 101 } 102 splx(s); 103 return (error); 104 } 105 #define ROUNDUP(a) \ 106 ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) 107 #define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) 108 109 /*ARGSUSED*/ 110 route_output(m, so) 111 register struct mbuf *m; 112 struct socket *so; 113 { 114 register struct rt_msghdr *rtm = 0; 115 register struct rtentry *rt = 0; 116 struct rtentry *saved_nrt = 0; 117 struct sockaddr *dst = 0, *gate = 0, *netmask = 0, *genmask = 0; 118 struct sockaddr *ifpaddr = 0, *ifaaddr = 0; 119 caddr_t cp, lim; 120 int len, error = 0; 121 struct ifnet *ifp = 0; 122 struct ifaddr *ifa = 0; 123 struct ifaddr *ifaof_ifpforaddr(), *ifa_ifwithroute(); 124 125 #define senderr(e) { error = e; goto flush;} 126 if (m == 0 || m->m_len < sizeof(long)) 127 return (ENOBUFS); 128 if ((m = m_pullup(m, sizeof(long))) == 0) 129 return (ENOBUFS); 130 if ((m->m_flags & M_PKTHDR) == 0) 131 panic("route_output"); 132 len = m->m_pkthdr.len; 133 if (len < sizeof(*rtm) || 134 len != mtod(m, struct rt_msghdr *)->rtm_msglen) 135 senderr(EINVAL); 136 R_Malloc(rtm, struct rt_msghdr *, len); 137 if (rtm == 0) 138 senderr(ENOBUFS); 139 m_copydata(m, 0, len, (caddr_t)rtm); 140 if (rtm->rtm_version != RTM_VERSION) 141 senderr(EPROTONOSUPPORT); 142 rtm->rtm_pid = curproc->p_pid; 143 lim = len + (caddr_t) rtm; 144 cp = (caddr_t) (rtm + 1); 145 if (rtm->rtm_addrs & RTA_DST) { 146 dst = (struct sockaddr *)cp; 147 ADVANCE(cp, dst); 148 } else 149 senderr(EINVAL); 150 if ((rtm->rtm_addrs & RTA_GATEWAY) && cp < lim) { 151 gate = (struct sockaddr *)cp; 152 ADVANCE(cp, gate); 153 } 154 if ((rtm->rtm_addrs & RTA_NETMASK) && cp < lim) { 155 netmask = (struct sockaddr *)cp; 156 ADVANCE(cp, netmask); 157 } 158 if ((rtm->rtm_addrs & RTA_GENMASK) && cp < lim) { 159 struct radix_node *t, *rn_addmask(); 160 genmask = (struct sockaddr *)cp; 161 ADVANCE(cp, genmask); 162 t = rn_addmask(genmask, 1, 2); 163 if (t && Bcmp(genmask, t->rn_key, *(u_char *)genmask) == 0) 164 genmask = (struct sockaddr *)(t->rn_key); 165 else 166 senderr(ENOBUFS); 167 } 168 if ((rtm->rtm_addrs & RTA_IFP) && cp < lim) { 169 ifpaddr = (struct sockaddr *)cp; 170 ADVANCE(cp, ifpaddr); 171 } 172 if ((rtm->rtm_addrs & RTA_IFA) && cp < lim) { 173 ifaaddr = (struct sockaddr *)cp; 174 } 175 switch (rtm->rtm_type) { 176 case RTM_ADD: 177 if (gate == 0) 178 senderr(EINVAL); 179 error = rtrequest(RTM_ADD, dst, gate, netmask, 180 rtm->rtm_flags, &saved_nrt); 181 if (error == 0 && saved_nrt) { 182 rt_setmetrics(rtm->rtm_inits, 183 &rtm->rtm_rmx, &saved_nrt->rt_rmx); 184 saved_nrt->rt_refcnt--; 185 saved_nrt->rt_genmask = genmask; 186 } 187 break; 188 189 case RTM_DELETE: 190 error = rtrequest(RTM_DELETE, dst, gate, netmask, 191 rtm->rtm_flags, (struct rtentry **)0); 192 break; 193 194 case RTM_GET: 195 case RTM_CHANGE: 196 case RTM_LOCK: 197 rt = rtalloc1(dst, 0); 198 if (rt == 0) 199 senderr(ESRCH); 200 if (rtm->rtm_type != RTM_GET) { 201 if (Bcmp(dst, rt_key(rt), dst->sa_len) != 0) 202 senderr(ESRCH); 203 if (rt->rt_nodes->rn_dupedkey && 204 (netmask == 0 || 205 Bcmp(netmask, rt_mask(rt), netmask->sa_len))) 206 senderr(ETOOMANYREFS); 207 } 208 switch(rtm->rtm_type) { 209 210 case RTM_GET: 211 dst = rt_key(rt); len = sizeof(*rtm); 212 ADVANCE(len, dst); 213 rtm->rtm_addrs |= RTA_DST; 214 if (gate = rt->rt_gateway) { 215 ADVANCE(len, gate); 216 rtm->rtm_addrs |= RTA_GATEWAY; 217 } else 218 rtm->rtm_addrs &= ~RTA_GATEWAY; 219 if (netmask = rt_mask(rt)) { 220 ADVANCE(len, netmask); 221 rtm->rtm_addrs |= RTA_NETMASK; 222 } else 223 rtm->rtm_addrs &= ~RTA_NETMASK; 224 if (genmask = rt->rt_genmask) { 225 ADVANCE(len, genmask); 226 rtm->rtm_addrs |= RTA_GENMASK; 227 } else 228 rtm->rtm_addrs &= ~RTA_GENMASK; 229 if (rtm->rtm_addrs & (RTA_IFP | RTA_IFA)) { 230 if (rt->rt_ifp == 0) 231 goto badif; 232 for (ifa = rt->rt_ifp->if_addrlist; 233 ifa && ifa->ifa_addr->sa_family != AF_LINK; 234 ifa = ifa->ifa_next){} 235 if (ifa && rt->rt_ifa) { 236 ifpaddr = ifa->ifa_addr; 237 ADVANCE(len, ifpaddr); 238 ifaaddr = rt->rt_ifa->ifa_addr; 239 ADVANCE(len, ifaaddr); 240 rtm->rtm_addrs |= RTA_IFP | RTA_IFA; 241 } else { 242 badif: ifpaddr = 0; 243 rtm->rtm_addrs &= ~(RTA_IFP | RTA_IFA); 244 } 245 } 246 if (len > rtm->rtm_msglen) { 247 struct rt_msghdr *new_rtm; 248 R_Malloc(new_rtm, struct rt_msghdr *, len); 249 if (new_rtm == 0) 250 senderr(ENOBUFS); 251 Bcopy(rtm, new_rtm, rtm->rtm_msglen); 252 Free(rtm); rtm = new_rtm; 253 } 254 rtm->rtm_msglen = len; 255 rtm->rtm_flags = rt->rt_flags; 256 rtm->rtm_rmx = rt->rt_rmx; 257 cp = (caddr_t) (1 + rtm); 258 len = ROUNDUP(dst->sa_len); 259 Bcopy(dst, cp, len); cp += len; 260 if (gate) { 261 len = ROUNDUP(gate->sa_len); 262 Bcopy(gate, cp, len); cp += len; 263 } 264 if (netmask) { 265 len = ROUNDUP(netmask->sa_len); 266 Bcopy(netmask, cp, len); cp += len; 267 } 268 if (genmask) { 269 len = ROUNDUP(genmask->sa_len); 270 Bcopy(genmask, cp, len); cp += len; 271 } 272 if (ifpaddr) { 273 len = ROUNDUP(ifpaddr->sa_len); 274 Bcopy(ifpaddr, cp, len); cp += len; 275 len = ROUNDUP(ifaaddr->sa_len); 276 Bcopy(ifaaddr, cp, len); cp += len; 277 } 278 break; 279 280 case RTM_CHANGE: 281 if (gate && 282 (gate->sa_len > (len = rt->rt_gateway->sa_len))) 283 senderr(EDQUOT); 284 /* new gateway could require new ifaddr, ifp; 285 flags may also be different; ifp may be specified 286 by ll sockaddr when protocol address is ambiguous */ 287 if (ifpaddr && (ifa = ifa_ifwithnet(ifpaddr)) && 288 (ifp = ifa->ifa_ifp)) 289 ifa = ifaof_ifpforaddr(ifaaddr ? ifaaddr : gate, 290 ifp); 291 else if ((ifaaddr && (ifa = ifa_ifwithaddr(ifaaddr))) || 292 (ifa = ifa_ifwithroute(rt->rt_flags, 293 rt_key(rt), gate))) 294 ifp = ifa->ifa_ifp; 295 if (ifa) { 296 register struct ifaddr *oifa = rt->rt_ifa; 297 if (oifa != ifa) { 298 if (oifa && oifa->ifa_rtrequest) 299 oifa->ifa_rtrequest(RTM_DELETE, 300 rt, gate); 301 rt->rt_ifa = ifa; 302 rt->rt_ifp = ifp; 303 } 304 } 305 if (gate) 306 Bcopy(gate, rt->rt_gateway, len); 307 rt_setmetrics(rtm->rtm_inits, &rtm->rtm_rmx, 308 &rt->rt_rmx); 309 if (rt->rt_ifa && rt->rt_ifa->ifa_rtrequest) 310 rt->rt_ifa->ifa_rtrequest(RTM_ADD, rt, gate); 311 if (genmask) 312 rt->rt_genmask = genmask; 313 /* 314 * Fall into 315 */ 316 case RTM_LOCK: 317 rt->rt_rmx.rmx_locks |= 318 (rtm->rtm_inits & rtm->rtm_rmx.rmx_locks); 319 rt->rt_rmx.rmx_locks &= ~(rtm->rtm_inits); 320 break; 321 } 322 goto cleanup; 323 324 default: 325 senderr(EOPNOTSUPP); 326 } 327 328 flush: 329 if (rtm) { 330 if (error) 331 rtm->rtm_errno = error; 332 else 333 rtm->rtm_flags |= RTF_DONE; 334 } 335 cleanup: 336 if (rt) 337 rtfree(rt); 338 { 339 register struct rawcb *rp = 0; 340 /* 341 * Check to see if we don't want our own messages. 342 */ 343 if ((so->so_options & SO_USELOOPBACK) == 0) { 344 if (route_cb.any_count <= 1) { 345 if (rtm) 346 Free(rtm); 347 m_freem(m); 348 return (error); 349 } 350 /* There is another listener, so construct message */ 351 rp = sotorawcb(so); 352 } 353 if (rtm) { 354 m_copyback(m, 0, rtm->rtm_msglen, (caddr_t)rtm); 355 Free(rtm); 356 } 357 if (rp) 358 rp->rcb_proto.sp_family = 0; /* Avoid us */ 359 if (dst) 360 route_proto.sp_protocol = dst->sa_family; 361 raw_input(m, &route_proto, &route_src, &route_dst); 362 if (rp) 363 rp->rcb_proto.sp_family = PF_ROUTE; 364 } 365 return (error); 366 } 367 368 rt_setmetrics(which, in, out) 369 u_long which; 370 register struct rt_metrics *in, *out; 371 { 372 #define metric(f, e) if (which & (f)) out->e = in->e; 373 metric(RTV_RPIPE, rmx_recvpipe); 374 metric(RTV_SPIPE, rmx_sendpipe); 375 metric(RTV_SSTHRESH, rmx_ssthresh); 376 metric(RTV_RTT, rmx_rtt); 377 metric(RTV_RTTVAR, rmx_rttvar); 378 metric(RTV_HOPCOUNT, rmx_hopcount); 379 metric(RTV_MTU, rmx_mtu); 380 metric(RTV_EXPIRE, rmx_expire); 381 #undef metric 382 } 383 384 /* 385 * Copy data from a buffer back into the indicated mbuf chain, 386 * starting "off" bytes from the beginning, extending the mbuf 387 * chain if necessary. 388 */ 389 m_copyback(m0, off, len, cp) 390 struct mbuf *m0; 391 register int off; 392 register int len; 393 caddr_t cp; 394 395 { 396 register int mlen; 397 register struct mbuf *m = m0, *n; 398 int totlen = 0; 399 400 if (m0 == 0) 401 return; 402 while (off > (mlen = m->m_len)) { 403 off -= mlen; 404 totlen += mlen; 405 if (m->m_next == 0) { 406 n = m_getclr(M_DONTWAIT, m->m_type); 407 if (n == 0) 408 goto out; 409 n->m_len = min(MLEN, len + off); 410 m->m_next = n; 411 } 412 m = m->m_next; 413 } 414 while (len > 0) { 415 mlen = min (m->m_len - off, len); 416 bcopy(cp, off + mtod(m, caddr_t), (unsigned)mlen); 417 cp += mlen; 418 len -= mlen; 419 mlen += off; 420 off = 0; 421 totlen += mlen; 422 if (len == 0) 423 break; 424 if (m->m_next == 0) { 425 n = m_get(M_DONTWAIT, m->m_type); 426 if (n == 0) 427 break; 428 n->m_len = min(MLEN, len); 429 m->m_next = n; 430 } 431 m = m->m_next; 432 } 433 out: if (((m = m0)->m_flags & M_PKTHDR) && (m->m_pkthdr.len < totlen)) 434 m->m_pkthdr.len = totlen; 435 } 436 437 /* 438 * The miss message and losing message are very similar. 439 */ 440 441 rt_missmsg(type, dst, gate, mask, src, flags, error) 442 register struct sockaddr *dst; 443 struct sockaddr *gate, *mask, *src; 444 { 445 register struct rt_msghdr *rtm; 446 register struct mbuf *m; 447 int dlen = ROUNDUP(dst->sa_len); 448 int len = dlen + sizeof(*rtm); 449 450 if (route_cb.any_count == 0) 451 return; 452 m = m_gethdr(M_DONTWAIT, MT_DATA); 453 if (m == 0) 454 return; 455 m->m_pkthdr.len = m->m_len = min(len, MHLEN); 456 m->m_pkthdr.rcvif = 0; 457 rtm = mtod(m, struct rt_msghdr *); 458 bzero((caddr_t)rtm, sizeof(*rtm)); /*XXX assumes sizeof(*rtm) < MHLEN*/ 459 rtm->rtm_flags = RTF_DONE | flags; 460 rtm->rtm_msglen = len; 461 rtm->rtm_version = RTM_VERSION; 462 rtm->rtm_type = type; 463 rtm->rtm_addrs = RTA_DST; 464 if (type == RTM_OLDADD || type == RTM_OLDDEL) { 465 rtm->rtm_pid = curproc->p_pid; 466 } 467 m_copyback(m, sizeof (*rtm), dlen, (caddr_t)dst); 468 if (gate) { 469 dlen = ROUNDUP(gate->sa_len); 470 m_copyback(m, len , dlen, (caddr_t)gate); 471 len += dlen; 472 rtm->rtm_addrs |= RTA_GATEWAY; 473 } 474 if (mask) { 475 dlen = ROUNDUP(mask->sa_len); 476 m_copyback(m, len , dlen, (caddr_t)mask); 477 len += dlen; 478 rtm->rtm_addrs |= RTA_NETMASK; 479 } 480 if (src) { 481 dlen = ROUNDUP(src->sa_len); 482 m_copyback(m, len , dlen, (caddr_t)src); 483 len += dlen; 484 rtm->rtm_addrs |= RTA_AUTHOR; 485 } 486 if (m->m_pkthdr.len != len) { 487 m_freem(m); 488 return; 489 } 490 rtm->rtm_errno = error; 491 rtm->rtm_msglen = len; 492 route_proto.sp_protocol = dst->sa_family; 493 raw_input(m, &route_proto, &route_src, &route_dst); 494 } 495 496 #ifdef notdef 497 #include <sys/kinfo.h> 498 struct walkarg { 499 int w_op, w_arg; 500 int w_given, w_needed; 501 caddr_t w_where; 502 struct { 503 struct rt_msghdr m_rtm; 504 char m_sabuf[128]; 505 } w_m; 506 #define w_rtm w_m.m_rtm 507 }; 508 /* 509 * This is used in dumping the kernel table via getkinfo(). 510 */ 511 rt_dumpentry(rn, w) 512 struct radix_node *rn; 513 register struct walkarg *w; 514 { 515 register struct sockaddr *sa; 516 int n, error; 517 518 for (; rn; rn = rn->rn_dupedkey) { 519 int count = 0, size = sizeof(w->w_rtm); 520 register struct rtentry *rt = (struct rtentry *)rn; 521 522 if (rn->rn_flags & RNF_ROOT) 523 continue; 524 if (w->w_op == KINFO_RT_FLAGS && !(rt->rt_flags & w->w_arg)) 525 continue; 526 #define next(a, l) {size += (l); w->w_rtm.rtm_addrs |= (a); } 527 w->w_rtm.rtm_addrs = 0; 528 if (sa = rt_key(rt)) 529 next(RTA_DST, ROUNDUP(sa->sa_len)); 530 if (sa = rt->rt_gateway) 531 next(RTA_GATEWAY, ROUNDUP(sa->sa_len)); 532 if (sa = rt_mask(rt)) 533 next(RTA_NETMASK, ROUNDUP(sa->sa_len)); 534 if (sa = rt->rt_genmask) 535 next(RTA_GENMASK, ROUNDUP(sa->sa_len)); 536 w->w_needed += size; 537 if (w->w_where == NULL || w->w_needed > 0) 538 continue; 539 w->w_rtm.rtm_msglen = size; 540 w->w_rtm.rtm_flags = rt->rt_flags; 541 w->w_rtm.rtm_use = rt->rt_use; 542 w->w_rtm.rtm_rmx = rt->rt_rmx; 543 w->w_rtm.rtm_index = rt->rt_ifp->if_index; 544 #undef next 545 #define next(l) {n = (l); Bcopy(sa, cp, n); cp += n;} 546 if (size <= sizeof(w->w_m)) { 547 register caddr_t cp = (caddr_t)(w->w_m.m_sabuf); 548 if (sa = rt_key(rt)) 549 next(ROUNDUP(sa->sa_len)); 550 if (sa = rt->rt_gateway) 551 next(ROUNDUP(sa->sa_len)); 552 if (sa = rt_mask(rt)) 553 next(ROUNDUP(sa->sa_len)); 554 if (sa = rt->rt_genmask) 555 next(ROUNDUP(sa->sa_len)); 556 #undef next 557 #define next(s, l) {n = (l); \ 558 if (error = copyout((caddr_t)(s), w->w_where, n)) return (error); \ 559 w->w_where += n;} 560 561 next(&w->w_m, size); /* Copy rtmsg and sockaddrs back */ 562 continue; 563 } 564 next(&w->w_rtm, sizeof(w->w_rtm)); 565 if (sa = rt_key(rt)) 566 next(sa, ROUNDUP(sa->sa_len)); 567 if (sa = rt->rt_gateway) 568 next(sa, ROUNDUP(sa->sa_len)); 569 if (sa = rt_mask(rt)) 570 next(sa, ROUNDUP(sa->sa_len)); 571 if (sa = rt->rt_genmask) 572 next(sa, ROUNDUP(sa->sa_len)); 573 } 574 return (0); 575 #undef next 576 } 577 578 kinfo_rtable(op, where, given, arg, needed) 579 int op, arg; 580 caddr_t where; 581 int *given, *needed; 582 { 583 register struct radix_node_head *rnh; 584 int s, error = 0; 585 u_char af = ki_af(op); 586 struct walkarg w; 587 588 op &= 0xffff; 589 if (op != KINFO_RT_DUMP && op != KINFO_RT_FLAGS) 590 return (EINVAL); 591 592 Bzero(&w, sizeof(w)); 593 if ((w.w_where = where) && given) 594 w.w_given = *given; 595 w.w_needed = 0 - w.w_given; 596 w.w_arg = arg; 597 w.w_op = op; 598 w.w_rtm.rtm_version = RTM_VERSION; 599 w.w_rtm.rtm_type = RTM_GET; 600 601 s = splnet(); 602 for (rnh = radix_node_head; rnh; rnh = rnh->rnh_next) { 603 if (rnh->rnh_af == 0) 604 continue; 605 if (af && af != rnh->rnh_af) 606 continue; 607 error = rt_walk(rnh->rnh_treetop, rt_dumpentry, &w); 608 if (error) 609 break; 610 } 611 w.w_needed += w.w_given; 612 if (where && given) 613 *given = w.w_where - where; 614 else 615 w.w_needed = (11 * w.w_needed) / 10; 616 *needed = w.w_needed; 617 splx(s); 618 return (error); 619 } 620 621 rt_walk(rn, f, w) 622 register struct radix_node *rn; 623 register int (*f)(); 624 struct walkarg *w; 625 { 626 int error; 627 for (;;) { 628 while (rn->rn_b >= 0) 629 rn = rn->rn_l; /* First time through node, go left */ 630 if (error = (*f)(rn, w)) 631 return (error); /* Process Leaf */ 632 while (rn->rn_p->rn_r == rn) { /* if coming back from right */ 633 rn = rn->rn_p; /* go back up */ 634 if (rn->rn_flags & RNF_ROOT) 635 return 0; 636 } 637 rn = rn->rn_p->rn_r; /* otherwise, go right*/ 638 } 639 } 640 #endif 641 642 /* 643 * Definitions of protocols supported in the ROUTE domain. 644 */ 645 646 int raw_init(),raw_usrreq(),raw_input(),raw_ctlinput(); 647 extern struct domain routedomain; /* or at least forward */ 648 649 struct protosw routesw[] = { 650 { SOCK_RAW, &routedomain, 0, PR_ATOMIC|PR_ADDR, 651 raw_input, route_output, raw_ctlinput, 0, 652 route_usrreq, 653 raw_init, 0, 0, 0, 654 } 655 }; 656 657 int unp_externalize(), unp_dispose(); 658 659 struct domain routedomain = 660 { PF_ROUTE, "route", 0, 0, 0, 661 routesw, &routesw[sizeof(routesw)/sizeof(routesw[0])] }; 662
Indexes created Fri Oct 03 02:09:57 GMT 2025