if.c revision 1.50
1 /* $NetBSD: if.c,v 1.50 1999/07/09 23:41:16 thorpej Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1980, 1986, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)if.c 8.5 (Berkeley) 1/9/95 65 */ 66 67 #include "opt_inet.h" 68 69 #include "opt_compat_linux.h" 70 #include "opt_compat_svr4.h" 71 #include "opt_compat_43.h" 72 73 #include <sys/param.h> 74 #include <sys/mbuf.h> 75 #include <sys/systm.h> 76 #include <sys/proc.h> 77 #include <sys/socket.h> 78 #include <sys/socketvar.h> 79 #include <sys/protosw.h> 80 #include <sys/kernel.h> 81 #include <sys/ioctl.h> 82 83 #include <net/if.h> 84 #include <net/if_dl.h> 85 #include <net/if_types.h> 86 #include <net/radix.h> 87 88 #ifdef INET6 89 /*XXX*/ 90 #include <netinet/in.h> 91 #endif 92 93 int ifqmaxlen = IFQ_MAXLEN; 94 void if_slowtimo __P((void *arg)); 95 96 #ifdef INET6 97 /* 98 * XXX: declare here to avoid to include many inet6 related files.. 99 * should be more generalized? 100 */ 101 extern void nd6_setmtu __P((struct ifnet *)); 102 #endif 103 104 /* 105 * Network interface utility routines. 106 * 107 * Routines with ifa_ifwith* names take sockaddr *'s as 108 * parameters. 109 */ 110 void 111 ifinit() 112 { 113 114 if_slowtimo(NULL); 115 } 116 117 int if_index = 0; 118 struct ifaddr **ifnet_addrs = NULL; 119 struct ifnet **ifindex2ifnet = NULL; 120 121 /* 122 * Attach an interface to the 123 * list of "active" interfaces. 124 */ 125 void 126 if_attach(ifp) 127 struct ifnet *ifp; 128 { 129 unsigned socksize, ifasize; 130 int namelen, masklen; 131 register struct sockaddr_dl *sdl; 132 register struct ifaddr *ifa; 133 static size_t if_indexlim = 8; 134 135 if (if_index == 0) 136 TAILQ_INIT(&ifnet); 137 TAILQ_INIT(&ifp->if_addrlist); 138 TAILQ_INSERT_TAIL(&ifnet, ifp, if_list); 139 ifp->if_index = ++if_index; 140 141 /* 142 * We have some arrays that should be indexed by if_index. 143 * since if_index will grow dynamically, they should grow too. 144 * struct ifadd **ifnet_addrs 145 * struct ifnet **ifindex2ifnet 146 */ 147 if (ifnet_addrs == 0 || ifindex2ifnet == 0 || if_index >= if_indexlim) { 148 size_t n; 149 caddr_t q; 150 151 while (if_index >= if_indexlim) 152 if_indexlim <<= 1; 153 154 /* grow ifnet_addrs */ 155 n = if_indexlim * sizeof(ifa); 156 q = (caddr_t)malloc(n, M_IFADDR, M_WAITOK); 157 bzero(q, n); 158 if (ifnet_addrs) { 159 bcopy((caddr_t)ifnet_addrs, q, n/2); 160 free((caddr_t)ifnet_addrs, M_IFADDR); 161 } 162 ifnet_addrs = (struct ifaddr **)q; 163 164 /* grow ifindex2ifnet */ 165 n = if_indexlim * sizeof(struct ifnet *); 166 q = (caddr_t)malloc(n, M_IFADDR, M_WAITOK); 167 bzero(q, n); 168 if (ifindex2ifnet) { 169 bcopy((caddr_t)ifindex2ifnet, q, n/2); 170 free((caddr_t)ifindex2ifnet, M_IFADDR); 171 } 172 ifindex2ifnet = (struct ifnet **)q; 173 } 174 175 ifindex2ifnet[if_index] = ifp; 176 177 /* 178 * create a Link Level name for this device 179 */ 180 namelen = strlen(ifp->if_xname); 181 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + namelen; 182 socksize = masklen + ifp->if_addrlen; 183 #define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1))) 184 if (socksize < sizeof(*sdl)) 185 socksize = sizeof(*sdl); 186 socksize = ROUNDUP(socksize); 187 ifasize = sizeof(*ifa) + 2 * socksize; 188 ifa = (struct ifaddr *)malloc(ifasize, M_IFADDR, M_WAITOK); 189 bzero((caddr_t)ifa, ifasize); 190 sdl = (struct sockaddr_dl *)(ifa + 1); 191 sdl->sdl_len = socksize; 192 sdl->sdl_family = AF_LINK; 193 bcopy(ifp->if_xname, sdl->sdl_data, namelen); 194 sdl->sdl_nlen = namelen; 195 sdl->sdl_index = ifp->if_index; 196 sdl->sdl_type = ifp->if_type; 197 ifnet_addrs[if_index] = ifa; 198 ifa->ifa_ifp = ifp; 199 ifa->ifa_rtrequest = link_rtrequest; 200 TAILQ_INSERT_HEAD(&ifp->if_addrlist, ifa, ifa_list); 201 ifa->ifa_addr = (struct sockaddr *)sdl; 202 ifp->if_sadl = sdl; 203 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl); 204 ifa->ifa_netmask = (struct sockaddr *)sdl; 205 sdl->sdl_len = masklen; 206 while (namelen != 0) 207 sdl->sdl_data[--namelen] = 0xff; 208 if (ifp->if_snd.ifq_maxlen == 0) 209 ifp->if_snd.ifq_maxlen = ifqmaxlen; 210 ifp->if_broadcastaddr = 0; /* reliably crash if used uninitialized */ 211 } 212 /* 213 * Locate an interface based on a complete address. 214 */ 215 /*ARGSUSED*/ 216 struct ifaddr * 217 ifa_ifwithaddr(addr) 218 register struct sockaddr *addr; 219 { 220 register struct ifnet *ifp; 221 register struct ifaddr *ifa; 222 223 #define equal(a1, a2) \ 224 (bcmp((caddr_t)(a1), (caddr_t)(a2), ((struct sockaddr *)(a1))->sa_len) == 0) 225 for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) 226 for (ifa = ifp->if_addrlist.tqh_first; ifa != 0; ifa = ifa->ifa_list.tqe_next) { 227 if (ifa->ifa_addr->sa_family != addr->sa_family) 228 continue; 229 if (equal(addr, ifa->ifa_addr)) 230 return (ifa); 231 if ((ifp->if_flags & IFF_BROADCAST) && ifa->ifa_broadaddr && 232 /* IP6 doesn't have broadcast */ 233 ifa->ifa_broadaddr->sa_len != 0 && 234 equal(ifa->ifa_broadaddr, addr)) 235 return (ifa); 236 } 237 return ((struct ifaddr *)0); 238 } 239 240 /* 241 * Locate the point to point interface with a given destination address. 242 */ 243 /*ARGSUSED*/ 244 struct ifaddr * 245 ifa_ifwithdstaddr(addr) 246 register struct sockaddr *addr; 247 { 248 register struct ifnet *ifp; 249 register struct ifaddr *ifa; 250 251 for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) 252 if (ifp->if_flags & IFF_POINTOPOINT) 253 for (ifa = ifp->if_addrlist.tqh_first; ifa != 0; ifa = ifa->ifa_list.tqe_next) { 254 if (ifa->ifa_addr->sa_family != addr->sa_family || 255 ifa->ifa_dstaddr == NULL) 256 continue; 257 if (equal(addr, ifa->ifa_dstaddr)) 258 return (ifa); 259 } 260 return ((struct ifaddr *)0); 261 } 262 263 /* 264 * Find an interface on a specific network. If many, choice 265 * is most specific found. 266 */ 267 struct ifaddr * 268 ifa_ifwithnet(addr) 269 struct sockaddr *addr; 270 { 271 register struct ifnet *ifp; 272 register struct ifaddr *ifa; 273 struct ifaddr *ifa_maybe = 0; 274 u_int af = addr->sa_family; 275 char *addr_data = addr->sa_data, *cplim; 276 277 if (af == AF_LINK) { 278 register struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr; 279 if (sdl->sdl_index && sdl->sdl_index <= if_index) 280 return (ifnet_addrs[sdl->sdl_index]); 281 } 282 for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) 283 for (ifa = ifp->if_addrlist.tqh_first; ifa != 0; ifa = ifa->ifa_list.tqe_next) { 284 register char *cp, *cp2, *cp3; 285 286 if (ifa->ifa_addr->sa_family != af || 287 ifa->ifa_netmask == 0) 288 next: continue; 289 cp = addr_data; 290 cp2 = ifa->ifa_addr->sa_data; 291 cp3 = ifa->ifa_netmask->sa_data; 292 cplim = (char *)ifa->ifa_netmask + 293 ifa->ifa_netmask->sa_len; 294 while (cp3 < cplim) 295 if ((*cp++ ^ *cp2++) & *cp3++) 296 /* want to continue for() loop */ 297 goto next; 298 if (ifa_maybe == 0 || 299 rn_refines((caddr_t)ifa->ifa_netmask, 300 (caddr_t)ifa_maybe->ifa_netmask)) 301 ifa_maybe = ifa; 302 } 303 return (ifa_maybe); 304 } 305 /* 306 * Find the interface of the addresss. 307 */ 308 struct ifaddr * 309 ifa_ifwithladdr(addr) 310 struct sockaddr *addr; 311 { 312 struct ifaddr *ia; 313 314 if ((ia = ifa_ifwithaddr(addr)) || (ia = ifa_ifwithdstaddr(addr)) 315 || (ia = ifa_ifwithnet(addr))) 316 return (ia); 317 return (NULL); 318 } 319 320 /* 321 * Find an interface using a specific address family 322 */ 323 struct ifaddr * 324 ifa_ifwithaf(af) 325 register int af; 326 { 327 register struct ifnet *ifp; 328 register struct ifaddr *ifa; 329 330 for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) 331 for (ifa = ifp->if_addrlist.tqh_first; ifa != 0; ifa = ifa->ifa_list.tqe_next) 332 if (ifa->ifa_addr->sa_family == af) 333 return (ifa); 334 return ((struct ifaddr *)0); 335 } 336 337 /* 338 * Find an interface address specific to an interface best matching 339 * a given address. 340 */ 341 struct ifaddr * 342 ifaof_ifpforaddr(addr, ifp) 343 struct sockaddr *addr; 344 register struct ifnet *ifp; 345 { 346 register struct ifaddr *ifa; 347 register char *cp, *cp2, *cp3; 348 register char *cplim; 349 struct ifaddr *ifa_maybe = 0; 350 u_int af = addr->sa_family; 351 352 if (af >= AF_MAX) 353 return (0); 354 for (ifa = ifp->if_addrlist.tqh_first; ifa != 0; ifa = ifa->ifa_list.tqe_next) { 355 if (ifa->ifa_addr->sa_family != af) 356 continue; 357 ifa_maybe = ifa; 358 if (ifa->ifa_netmask == 0) { 359 if (equal(addr, ifa->ifa_addr) || 360 (ifa->ifa_dstaddr && equal(addr, ifa->ifa_dstaddr))) 361 return (ifa); 362 continue; 363 } 364 cp = addr->sa_data; 365 cp2 = ifa->ifa_addr->sa_data; 366 cp3 = ifa->ifa_netmask->sa_data; 367 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 368 for (; cp3 < cplim; cp3++) 369 if ((*cp++ ^ *cp2++) & *cp3) 370 break; 371 if (cp3 == cplim) 372 return (ifa); 373 } 374 return (ifa_maybe); 375 } 376 377 #include <net/route.h> 378 379 /* 380 * Default action when installing a route with a Link Level gateway. 381 * Lookup an appropriate real ifa to point to. 382 * This should be moved to /sys/net/link.c eventually. 383 */ 384 void 385 link_rtrequest(cmd, rt, sa) 386 int cmd; 387 register struct rtentry *rt; 388 struct sockaddr *sa; 389 { 390 register struct ifaddr *ifa; 391 struct sockaddr *dst; 392 struct ifnet *ifp; 393 394 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) || 395 ((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0)) 396 return; 397 if ((ifa = ifaof_ifpforaddr(dst, ifp)) != NULL) { 398 IFAFREE(rt->rt_ifa); 399 rt->rt_ifa = ifa; 400 ifa->ifa_refcnt++; 401 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 402 ifa->ifa_rtrequest(cmd, rt, sa); 403 } 404 } 405 406 /* 407 * Mark an interface down and notify protocols of 408 * the transition. 409 * NOTE: must be called at splsoftnet or equivalent. 410 */ 411 void 412 if_down(ifp) 413 register struct ifnet *ifp; 414 { 415 register struct ifaddr *ifa; 416 417 ifp->if_flags &= ~IFF_UP; 418 for (ifa = ifp->if_addrlist.tqh_first; ifa != 0; ifa = ifa->ifa_list.tqe_next) 419 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 420 if_qflush(&ifp->if_snd); 421 rt_ifmsg(ifp); 422 } 423 424 /* 425 * Mark an interface up and notify protocols of 426 * the transition. 427 * NOTE: must be called at splsoftnet or equivalent. 428 */ 429 void 430 if_up(ifp) 431 register struct ifnet *ifp; 432 { 433 #ifdef notyet 434 register struct ifaddr *ifa; 435 #endif 436 437 ifp->if_flags |= IFF_UP; 438 #ifdef notyet 439 /* this has no effect on IP, and will kill all ISO connections XXX */ 440 for (ifa = ifp->if_addrlist.tqh_first; ifa != 0; 441 ifa = ifa->ifa_list.tqe_next) 442 pfctlinput(PRC_IFUP, ifa->ifa_addr); 443 #endif 444 rt_ifmsg(ifp); 445 #ifdef INET6 446 in6_if_up(ifp); 447 #endif 448 } 449 450 /* 451 * Flush an interface queue. 452 */ 453 void 454 if_qflush(ifq) 455 register struct ifqueue *ifq; 456 { 457 register struct mbuf *m, *n; 458 459 n = ifq->ifq_head; 460 while ((m = n) != NULL) { 461 n = m->m_act; 462 m_freem(m); 463 } 464 ifq->ifq_head = 0; 465 ifq->ifq_tail = 0; 466 ifq->ifq_len = 0; 467 } 468 469 /* 470 * Handle interface watchdog timer routines. Called 471 * from softclock, we decrement timers (if set) and 472 * call the appropriate interface routine on expiration. 473 */ 474 void 475 if_slowtimo(arg) 476 void *arg; 477 { 478 register struct ifnet *ifp; 479 int s = splimp(); 480 481 for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) { 482 if (ifp->if_timer == 0 || --ifp->if_timer) 483 continue; 484 if (ifp->if_watchdog) 485 (*ifp->if_watchdog)(ifp); 486 } 487 splx(s); 488 timeout(if_slowtimo, NULL, hz / IFNET_SLOWHZ); 489 } 490 491 /* 492 * Map interface name to 493 * interface structure pointer. 494 */ 495 struct ifnet * 496 ifunit(name) 497 register char *name; 498 { 499 register struct ifnet *ifp; 500 501 for (ifp = ifnet.tqh_first; ifp != 0; ifp = ifp->if_list.tqe_next) 502 if (strcmp(ifp->if_xname, name) == 0) 503 return (ifp); 504 505 return (NULL); 506 } 507 508 509 /* 510 * Map interface name in a sockaddr_dl to 511 * interface structure pointer. 512 */ 513 struct ifnet * 514 if_withname(sa) 515 struct sockaddr *sa; 516 { 517 char ifname[IFNAMSIZ+1]; 518 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; 519 520 if ( (sa->sa_family != AF_LINK) || (sdl->sdl_nlen == 0) || 521 (sdl->sdl_nlen > IFNAMSIZ) ) 522 return NULL; 523 524 /* 525 * ifunit wants a null-terminated name. It may not be null-terminated 526 * in the sockaddr. We don't want to change the caller's sockaddr, 527 * and there might not be room to put the trailing null anyway, so we 528 * make a local copy that we know we can null terminate safely. 529 */ 530 531 bcopy(sdl->sdl_data, ifname, sdl->sdl_nlen); 532 ifname[sdl->sdl_nlen] = '\0'; 533 return ifunit(ifname); 534 } 535 536 537 /* 538 * Interface ioctls. 539 */ 540 int 541 ifioctl(so, cmd, data, p) 542 struct socket *so; 543 u_long cmd; 544 caddr_t data; 545 struct proc *p; 546 { 547 register struct ifnet *ifp; 548 register struct ifreq *ifr; 549 int error = 0; 550 short oif_flags; 551 552 switch (cmd) { 553 554 case SIOCGIFCONF: 555 case OSIOCGIFCONF: 556 return (ifconf(cmd, data)); 557 } 558 ifr = (struct ifreq *)data; 559 ifp = ifunit(ifr->ifr_name); 560 if (ifp == 0) 561 return (ENXIO); 562 oif_flags = ifp->if_flags; 563 switch (cmd) { 564 565 case SIOCGIFFLAGS: 566 ifr->ifr_flags = ifp->if_flags; 567 break; 568 569 case SIOCGIFMETRIC: 570 ifr->ifr_metric = ifp->if_metric; 571 break; 572 573 case SIOCGIFMTU: 574 ifr->ifr_mtu = ifp->if_mtu; 575 break; 576 577 case SIOCSIFFLAGS: 578 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 579 return (error); 580 if (ifp->if_flags & IFF_UP && (ifr->ifr_flags & IFF_UP) == 0) { 581 int s = splimp(); 582 if_down(ifp); 583 splx(s); 584 } 585 if (ifr->ifr_flags & IFF_UP && (ifp->if_flags & IFF_UP) == 0) { 586 int s = splimp(); 587 if_up(ifp); 588 splx(s); 589 } 590 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 591 (ifr->ifr_flags &~ IFF_CANTCHANGE); 592 if (ifp->if_ioctl) 593 (void) (*ifp->if_ioctl)(ifp, cmd, data); 594 break; 595 596 case SIOCSIFMETRIC: 597 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 598 return (error); 599 ifp->if_metric = ifr->ifr_metric; 600 break; 601 602 case SIOCSIFMTU: 603 { 604 u_long oldmtu = ifp->if_mtu; 605 606 error = suser(p->p_ucred, &p->p_acflag); 607 if (error) 608 return (error); 609 if (ifp->if_ioctl == NULL) 610 return (EOPNOTSUPP); 611 error = (*ifp->if_ioctl)(ifp, cmd, data); 612 613 /* 614 * If the link MTU changed, do network layer specific procedure. 615 */ 616 if (ifp->if_mtu != oldmtu) { 617 #ifdef INET6 618 nd6_setmtu(ifp); 619 #endif 620 } 621 break; 622 } 623 case SIOCADDMULTI: 624 case SIOCDELMULTI: 625 case SIOCSIFMEDIA: 626 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 627 return (error); 628 /* FALLTHROUGH */ 629 case SIOCGIFMEDIA: 630 if (ifp->if_ioctl == 0) 631 return (EOPNOTSUPP); 632 error = (*ifp->if_ioctl)(ifp, cmd, data); 633 break; 634 635 case SIOCSDRVSPEC: 636 /* XXX: need to pass proc pointer through to driver... */ 637 if ((error = suser(p->p_ucred, &p->p_acflag)) != 0) 638 return (error); 639 /* FALLTHROUGH */ 640 default: 641 if (so->so_proto == 0) 642 return (EOPNOTSUPP); 643 #if !defined(COMPAT_43) && !defined(COMPAT_LINUX) && !defined(COMPAT_SVR4) 644 error = ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 645 (struct mbuf *)cmd, (struct mbuf *)data, 646 (struct mbuf *)ifp, p)); 647 #else 648 { 649 int ocmd = cmd; 650 651 switch (cmd) { 652 653 case SIOCSIFADDR: 654 case SIOCSIFDSTADDR: 655 case SIOCSIFBRDADDR: 656 case SIOCSIFNETMASK: 657 #if BYTE_ORDER != BIG_ENDIAN 658 if (ifr->ifr_addr.sa_family == 0 && 659 ifr->ifr_addr.sa_len < 16) { 660 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len; 661 ifr->ifr_addr.sa_len = 16; 662 } 663 #else 664 if (ifr->ifr_addr.sa_len == 0) 665 ifr->ifr_addr.sa_len = 16; 666 #endif 667 break; 668 669 case OSIOCGIFADDR: 670 cmd = SIOCGIFADDR; 671 break; 672 673 case OSIOCGIFDSTADDR: 674 cmd = SIOCGIFDSTADDR; 675 break; 676 677 case OSIOCGIFBRDADDR: 678 cmd = SIOCGIFBRDADDR; 679 break; 680 681 case OSIOCGIFNETMASK: 682 cmd = SIOCGIFNETMASK; 683 } 684 685 error = ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 686 (struct mbuf *)cmd, (struct mbuf *)data, 687 (struct mbuf *)ifp, p)); 688 689 switch (ocmd) { 690 case OSIOCGIFADDR: 691 case OSIOCGIFDSTADDR: 692 case OSIOCGIFBRDADDR: 693 case OSIOCGIFNETMASK: 694 *(u_int16_t *)&ifr->ifr_addr = ifr->ifr_addr.sa_family; 695 } 696 } 697 #endif /* COMPAT_43 */ 698 break; 699 } 700 701 if (((oif_flags ^ ifp->if_flags) & IFF_UP) != 0) { 702 #ifdef INET6 703 if ((ifp->if_flags & IFF_UP) != 0) { 704 int s = splimp(); 705 in6_if_up(ifp); 706 splx(s); 707 } 708 #endif 709 } 710 711 return (error); 712 } 713 714 /* 715 * Return interface configuration 716 * of system. List may be used 717 * in later ioctl's (above) to get 718 * other information. 719 */ 720 /*ARGSUSED*/ 721 int 722 ifconf(cmd, data) 723 u_long cmd; 724 caddr_t data; 725 { 726 register struct ifconf *ifc = (struct ifconf *)data; 727 register struct ifnet *ifp; 728 register struct ifaddr *ifa; 729 struct ifreq ifr, *ifrp; 730 int space = ifc->ifc_len, error = 0; 731 732 ifrp = ifc->ifc_req; 733 for (ifp = ifnet.tqh_first; 734 space >= sizeof (ifr) && ifp != 0; ifp = ifp->if_list.tqe_next) { 735 bcopy(ifp->if_xname, ifr.ifr_name, IFNAMSIZ); 736 if ((ifa = ifp->if_addrlist.tqh_first) == 0) { 737 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr)); 738 error = copyout((caddr_t)&ifr, (caddr_t)ifrp, 739 sizeof(ifr)); 740 if (error) 741 break; 742 space -= sizeof (ifr), ifrp++; 743 } else 744 for (; space >= sizeof (ifr) && ifa != 0; ifa = ifa->ifa_list.tqe_next) { 745 register struct sockaddr *sa = ifa->ifa_addr; 746 #if defined(COMPAT_43) || defined(COMPAT_LINUX) || defined(COMPAT_SVR4) 747 if (cmd == OSIOCGIFCONF) { 748 struct osockaddr *osa = 749 (struct osockaddr *)&ifr.ifr_addr; 750 ifr.ifr_addr = *sa; 751 osa->sa_family = sa->sa_family; 752 error = copyout((caddr_t)&ifr, (caddr_t)ifrp, 753 sizeof (ifr)); 754 ifrp++; 755 } else 756 #endif 757 if (sa->sa_len <= sizeof(*sa)) { 758 ifr.ifr_addr = *sa; 759 error = copyout((caddr_t)&ifr, (caddr_t)ifrp, 760 sizeof (ifr)); 761 ifrp++; 762 } else { 763 space -= sa->sa_len - sizeof(*sa); 764 if (space < sizeof (ifr)) 765 break; 766 error = copyout((caddr_t)&ifr, (caddr_t)ifrp, 767 sizeof (ifr.ifr_name)); 768 if (error == 0) 769 error = copyout((caddr_t)sa, 770 (caddr_t)&ifrp->ifr_addr, sa->sa_len); 771 ifrp = (struct ifreq *) 772 (sa->sa_len + (caddr_t)&ifrp->ifr_addr); 773 } 774 if (error) 775 break; 776 space -= sizeof (ifr); 777 } 778 } 779 ifc->ifc_len -= space; 780 return (error); 781 } 782
Indexes created Mon Sep 22 21:09:42 GMT 2025