if_ethersubr.c revision 1.78
1 /* $NetBSD: if_ethersubr.c,v 1.78 2001/04/11 03:47:24 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) 1982, 1989, 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_ethersubr.c 8.2 (Berkeley) 4/4/96 65 */ 66 67 #include "opt_inet.h" 68 #include "opt_atalk.h" 69 #include "opt_ccitt.h" 70 #include "opt_llc.h" 71 #include "opt_iso.h" 72 #include "opt_ns.h" 73 #include "opt_gateway.h" 74 #include "opt_pfil_hooks.h" 75 #include "vlan.h" 76 #include "bridge.h" 77 #include "bpfilter.h" 78 79 #include <sys/param.h> 80 #include <sys/systm.h> 81 #include <sys/kernel.h> 82 #include <sys/malloc.h> 83 #include <sys/mbuf.h> 84 #include <sys/protosw.h> 85 #include <sys/socket.h> 86 #include <sys/ioctl.h> 87 #include <sys/errno.h> 88 #include <sys/syslog.h> 89 90 #include <machine/cpu.h> 91 92 #include <net/if.h> 93 #include <net/netisr.h> 94 #include <net/route.h> 95 #include <net/if_llc.h> 96 #include <net/if_dl.h> 97 #include <net/if_types.h> 98 99 #if NBPFILTER > 0 100 #include <net/bpf.h> 101 #endif 102 103 #include <net/if_ether.h> 104 #if NVLAN > 0 105 #include <net/if_vlanvar.h> 106 #endif 107 108 #if NBRIDGE > 0 109 #include <net/if_bridgevar.h> 110 #endif 111 112 #include <netinet/in.h> 113 #ifdef INET 114 #include <netinet/in_var.h> 115 #endif 116 #include <netinet/if_inarp.h> 117 118 #ifdef INET6 119 #ifndef INET 120 #include <netinet/in.h> 121 #endif 122 #include <netinet6/in6_var.h> 123 #include <netinet6/nd6.h> 124 #endif 125 126 #ifdef NS 127 #include <netns/ns.h> 128 #include <netns/ns_if.h> 129 #endif 130 131 #ifdef IPX 132 #include <netipx/ipx.h> 133 #include <netipx/ipx_if.h> 134 #endif 135 136 #ifdef ISO 137 #include <netiso/argo_debug.h> 138 #include <netiso/iso.h> 139 #include <netiso/iso_var.h> 140 #include <netiso/iso_snpac.h> 141 #endif 142 143 #ifdef LLC 144 #include <netccitt/dll.h> 145 #include <netccitt/llc_var.h> 146 #endif 147 148 #if defined(LLC) && defined(CCITT) 149 extern struct ifqueue pkintrq; 150 #endif 151 152 #ifdef NETATALK 153 #include <netatalk/at.h> 154 #include <netatalk/at_var.h> 155 #include <netatalk/at_extern.h> 156 157 #define llc_snap_org_code llc_un.type_snap.org_code 158 #define llc_snap_ether_type llc_un.type_snap.ether_type 159 160 extern u_char at_org_code[3]; 161 extern u_char aarp_org_code[3]; 162 #endif /* NETATALK */ 163 164 u_char etherbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 165 #define senderr(e) { error = (e); goto bad;} 166 167 #define SIN(x) ((struct sockaddr_in *)x) 168 169 static int ether_output __P((struct ifnet *, struct mbuf *, 170 struct sockaddr *, struct rtentry *)); 171 static void ether_input __P((struct ifnet *, struct mbuf *)); 172 173 /* 174 * Ethernet output routine. 175 * Encapsulate a packet of type family for the local net. 176 * Assumes that ifp is actually pointer to ethercom structure. 177 */ 178 static int 179 ether_output(struct ifnet *ifp, struct mbuf *m0, struct sockaddr *dst, 180 struct rtentry *rt0) 181 { 182 u_int16_t etype = 0; 183 int s, len, error = 0, hdrcmplt = 0; 184 u_char esrc[6], edst[6]; 185 struct mbuf *m = m0; 186 struct rtentry *rt; 187 struct mbuf *mcopy = (struct mbuf *)0; 188 struct ether_header *eh; 189 ALTQ_DECL(struct altq_pktattr pktattr;) 190 #ifdef INET 191 struct arphdr *ah; 192 #endif /* INET */ 193 #ifdef NETATALK 194 struct at_ifaddr *aa; 195 #endif /* NETATALK */ 196 short mflags; 197 198 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 199 senderr(ENETDOWN); 200 ifp->if_lastchange = time; 201 if ((rt = rt0) != NULL) { 202 if ((rt->rt_flags & RTF_UP) == 0) { 203 if ((rt0 = rt = rtalloc1(dst, 1)) != NULL) { 204 rt->rt_refcnt--; 205 if (rt->rt_ifp != ifp) 206 return (*rt->rt_ifp->if_output) 207 (ifp, m0, dst, rt); 208 } else 209 senderr(EHOSTUNREACH); 210 } 211 if ((rt->rt_flags & RTF_GATEWAY) && dst->sa_family != AF_NS) { 212 if (rt->rt_gwroute == 0) 213 goto lookup; 214 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 215 rtfree(rt); rt = rt0; 216 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1); 217 if ((rt = rt->rt_gwroute) == 0) 218 senderr(EHOSTUNREACH); 219 /* the "G" test below also prevents rt == rt0 */ 220 if ((rt->rt_flags & RTF_GATEWAY) || 221 (rt->rt_ifp != ifp)) { 222 rt->rt_refcnt--; 223 rt0->rt_gwroute = 0; 224 senderr(EHOSTUNREACH); 225 } 226 } 227 } 228 if (rt->rt_flags & RTF_REJECT) 229 if (rt->rt_rmx.rmx_expire == 0 || 230 time.tv_sec < rt->rt_rmx.rmx_expire) 231 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 232 } 233 234 switch (dst->sa_family) { 235 236 #ifdef INET 237 case AF_INET: 238 if (m->m_flags & M_BCAST) 239 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 240 sizeof(edst)); 241 242 else if (m->m_flags & M_MCAST) { 243 ETHER_MAP_IP_MULTICAST(&SIN(dst)->sin_addr, 244 (caddr_t)edst) 245 246 } else if (!arpresolve(ifp, rt, m, dst, edst)) 247 return (0); /* if not yet resolved */ 248 /* If broadcasting on a simplex interface, loopback a copy */ 249 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 250 mcopy = m_copy(m, 0, (int)M_COPYALL); 251 etype = htons(ETHERTYPE_IP); 252 break; 253 254 case AF_ARP: 255 ah = mtod(m, struct arphdr *); 256 if (m->m_flags & M_BCAST) 257 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 258 sizeof(edst)); 259 else 260 bcopy((caddr_t)ar_tha(ah), 261 (caddr_t)edst, sizeof(edst)); 262 263 ah->ar_hrd = htons(ARPHRD_ETHER); 264 265 switch(ntohs(ah->ar_op)) { 266 case ARPOP_REVREQUEST: 267 case ARPOP_REVREPLY: 268 etype = htons(ETHERTYPE_REVARP); 269 break; 270 271 case ARPOP_REQUEST: 272 case ARPOP_REPLY: 273 default: 274 etype = htons(ETHERTYPE_ARP); 275 } 276 277 break; 278 #endif 279 #ifdef INET6 280 case AF_INET6: 281 #ifdef OLDIP6OUTPUT 282 if (!nd6_resolve(ifp, rt, m, dst, (u_char *)edst)) 283 return(0); /* if not yet resolves */ 284 #else 285 if (!nd6_storelladdr(ifp, rt, m, dst, (u_char *)edst)){ 286 /* something bad happened */ 287 return(0); 288 } 289 #endif /* OLDIP6OUTPUT */ 290 etype = htons(ETHERTYPE_IPV6); 291 break; 292 #endif 293 #ifdef NETATALK 294 case AF_APPLETALK: 295 if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) { 296 #ifdef NETATALKDEBUG 297 printf("aarpresolv failed\n"); 298 #endif /* NETATALKDEBUG */ 299 return (0); 300 } 301 /* 302 * ifaddr is the first thing in at_ifaddr 303 */ 304 aa = (struct at_ifaddr *) at_ifawithnet( 305 (struct sockaddr_at *)dst, ifp); 306 if (aa == NULL) 307 goto bad; 308 309 /* 310 * In the phase 2 case, we need to prepend an mbuf for the 311 * llc header. Since we must preserve the value of m, 312 * which is passed to us by value, we m_copy() the first 313 * mbuf, and use it for our llc header. 314 */ 315 if (aa->aa_flags & AFA_PHASE2) { 316 struct llc llc; 317 318 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 319 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 320 llc.llc_control = LLC_UI; 321 bcopy(at_org_code, llc.llc_snap_org_code, 322 sizeof(llc.llc_snap_org_code)); 323 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 324 bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc)); 325 } else { 326 etype = htons(ETHERTYPE_ATALK); 327 } 328 break; 329 #endif /* NETATALK */ 330 #ifdef NS 331 case AF_NS: 332 etype = htons(ETHERTYPE_NS); 333 bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host), 334 (caddr_t)edst, sizeof (edst)); 335 if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst))) 336 return (looutput(ifp, m, dst, rt)); 337 /* If broadcasting on a simplex interface, loopback a copy */ 338 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 339 mcopy = m_copy(m, 0, (int)M_COPYALL); 340 break; 341 #endif 342 #ifdef IPX 343 case AF_IPX: 344 etype = htons(ETHERTYPE_IPX); 345 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 346 (caddr_t)edst, sizeof (edst)); 347 /* If broadcasting on a simplex interface, loopback a copy */ 348 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 349 mcopy = m_copy(m, 0, (int)M_COPYALL); 350 break; 351 #endif 352 #ifdef ISO 353 case AF_ISO: { 354 int snpalen; 355 struct llc *l; 356 struct sockaddr_dl *sdl; 357 358 if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) && 359 sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) { 360 bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst)); 361 } else { 362 error = iso_snparesolve(ifp, (struct sockaddr_iso *)dst, 363 (char *)edst, &snpalen); 364 if (error) 365 goto bad; /* Not Resolved */ 366 } 367 /* If broadcasting on a simplex interface, loopback a copy */ 368 if (*edst & 1) 369 m->m_flags |= (M_BCAST|M_MCAST); 370 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) && 371 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 372 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 373 if (mcopy) { 374 eh = mtod(mcopy, struct ether_header *); 375 bcopy((caddr_t)edst, 376 (caddr_t)eh->ether_dhost, sizeof (edst)); 377 bcopy(LLADDR(ifp->if_sadl), 378 (caddr_t)eh->ether_shost, sizeof (edst)); 379 } 380 } 381 M_PREPEND(m, 3, M_DONTWAIT); 382 if (m == NULL) 383 return (0); 384 l = mtod(m, struct llc *); 385 l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP; 386 l->llc_control = LLC_UI; 387 #ifdef ARGO_DEBUG 388 if (argo_debug[D_ETHER]) { 389 int i; 390 printf("unoutput: sending pkt to: "); 391 for (i=0; i<6; i++) 392 printf("%x ", edst[i] & 0xff); 393 printf("\n"); 394 } 395 #endif 396 } break; 397 #endif /* ISO */ 398 #ifdef LLC 399 /* case AF_NSAP: */ 400 case AF_CCITT: { 401 struct sockaddr_dl *sdl = 402 (struct sockaddr_dl *) rt -> rt_gateway; 403 404 if (sdl && sdl->sdl_family == AF_LINK 405 && sdl->sdl_alen > 0) { 406 bcopy(LLADDR(sdl), (char *)edst, 407 sizeof(edst)); 408 } else goto bad; /* Not a link interface ? Funny ... */ 409 if ((ifp->if_flags & IFF_SIMPLEX) && (*edst & 1) && 410 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 411 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 412 if (mcopy) { 413 eh = mtod(mcopy, struct ether_header *); 414 bcopy((caddr_t)edst, 415 (caddr_t)eh->ether_dhost, sizeof (edst)); 416 bcopy(LLADDR(ifp->if_sadl), 417 (caddr_t)eh->ether_shost, sizeof (edst)); 418 } 419 } 420 #ifdef LLC_DEBUG 421 { 422 int i; 423 struct llc *l = mtod(m, struct llc *); 424 425 printf("ether_output: sending LLC2 pkt to: "); 426 for (i=0; i<6; i++) 427 printf("%x ", edst[i] & 0xff); 428 printf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n", 429 m->m_pkthdr.len, l->llc_dsap & 0xff, l->llc_ssap &0xff, 430 l->llc_control & 0xff); 431 432 } 433 #endif /* LLC_DEBUG */ 434 } break; 435 #endif /* LLC */ 436 437 case pseudo_AF_HDRCMPLT: 438 hdrcmplt = 1; 439 eh = (struct ether_header *)dst->sa_data; 440 bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, sizeof (esrc)); 441 /* FALLTHROUGH */ 442 443 case AF_UNSPEC: 444 eh = (struct ether_header *)dst->sa_data; 445 bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, sizeof (edst)); 446 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 447 etype = eh->ether_type; 448 break; 449 450 default: 451 printf("%s: can't handle af%d\n", ifp->if_xname, 452 dst->sa_family); 453 senderr(EAFNOSUPPORT); 454 } 455 456 if (mcopy) 457 (void) looutput(ifp, mcopy, dst, rt); 458 459 /* If no ether type is set, this must be a 802.2 formatted packet. 460 */ 461 if (etype == 0) 462 etype = htons(m->m_pkthdr.len); 463 /* 464 * Add local net header. If no space in first mbuf, 465 * allocate another. 466 */ 467 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 468 if (m == 0) 469 senderr(ENOBUFS); 470 eh = mtod(m, struct ether_header *); 471 bcopy((caddr_t)&etype,(caddr_t)&eh->ether_type, 472 sizeof(eh->ether_type)); 473 bcopy((caddr_t)edst, (caddr_t)eh->ether_dhost, sizeof (edst)); 474 if (hdrcmplt) 475 bcopy((caddr_t)esrc, (caddr_t)eh->ether_shost, 476 sizeof(eh->ether_shost)); 477 else 478 bcopy(LLADDR(ifp->if_sadl), (caddr_t)eh->ether_shost, 479 sizeof(eh->ether_shost)); 480 481 #ifdef PFIL_HOOKS 482 if ((error = pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 483 return (error); 484 if (m == NULL) 485 return (0); 486 #endif 487 488 #if NBRIDGE > 0 489 /* 490 * Bridges require special output handling. 491 */ 492 if (ifp->if_bridge) 493 return (bridge_output(ifp, m, NULL, NULL)); 494 #endif 495 496 #ifdef ALTQ 497 /* 498 * If ALTQ is enabled on the parent interface, do 499 * classification; the queueing discipline might not 500 * require classification, but might require the 501 * address family/header pointer in the pktattr. 502 */ 503 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 504 altq_etherclassify(&ifp->if_snd, m, &pktattr); 505 #endif 506 507 mflags = m->m_flags; 508 len = m->m_pkthdr.len; 509 s = splimp(); 510 /* 511 * Queue message on interface, and start output if interface 512 * not yet active. 513 */ 514 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, error); 515 if (error) { 516 /* mbuf is already freed */ 517 splx(s); 518 return (error); 519 } 520 ifp->if_obytes += len; 521 if (mflags & M_MCAST) 522 ifp->if_omcasts++; 523 if ((ifp->if_flags & IFF_OACTIVE) == 0) 524 (*ifp->if_start)(ifp); 525 splx(s); 526 return (error); 527 528 bad: 529 if (m) 530 m_freem(m); 531 return (error); 532 } 533 534 #ifdef ALTQ 535 /* 536 * This routine is a slight hack to allow a packet to be classified 537 * if the Ethernet headers are present. It will go away when ALTQ's 538 * classification engine understands link headers. 539 */ 540 void 541 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m, 542 struct altq_pktattr *pktattr) 543 { 544 struct ether_header *eh; 545 u_int16_t ether_type; 546 int hlen, af, hdrsize; 547 caddr_t hdr; 548 549 hlen = ETHER_HDR_LEN; 550 eh = mtod(m, struct ether_header *); 551 552 ether_type = htons(eh->ether_type); 553 554 if (ether_type < ETHERMTU) { 555 /* LLC/SNAP */ 556 struct llc *llc = (struct llc *)(eh + 1); 557 hlen += 8; 558 559 if (m->m_len < hlen || 560 llc->llc_dsap != LLC_SNAP_LSAP || 561 llc->llc_ssap != LLC_SNAP_LSAP || 562 llc->llc_control != LLC_UI) { 563 /* Not SNAP. */ 564 goto bad; 565 } 566 567 ether_type = htons(llc->llc_un.type_snap.ether_type); 568 } 569 570 switch (ether_type) { 571 case ETHERTYPE_IP: 572 af = AF_INET; 573 hdrsize = 20; /* sizeof(struct ip) */ 574 break; 575 576 case ETHERTYPE_IPV6: 577 af = AF_INET6; 578 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 579 break; 580 581 default: 582 af = AF_UNSPEC; 583 hdrsize = 0; 584 break; 585 } 586 587 if (m->m_len < (hlen + hdrsize)) { 588 /* 589 * Ethernet and protocol header not in a single 590 * mbuf. We can't cope with this situation right 591 * now (but it shouldn't ever happen, really, anyhow). 592 * XXX Should use m_pulldown(). 593 */ 594 printf("altq_etherclassify: headers span multiple mbufs: " 595 "%d < %d\n", m->m_len, (hlen + hdrsize)); 596 goto bad; 597 } 598 599 m->m_data += hlen; 600 m->m_len -= hlen; 601 602 hdr = mtod(m, caddr_t); 603 604 if (ALTQ_NEEDS_CLASSIFY(ifq)) 605 pktattr->pattr_class = 606 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 607 pktattr->pattr_af = af; 608 pktattr->pattr_hdr = hdr; 609 610 m->m_data -= hlen; 611 m->m_len += hlen; 612 613 return; 614 615 bad: 616 pktattr->pattr_class = NULL; 617 pktattr->pattr_hdr = NULL; 618 pktattr->pattr_af = AF_UNSPEC; 619 } 620 #endif /* ALTQ */ 621 622 /* 623 * Process a received Ethernet packet; 624 * the packet is in the mbuf chain m with 625 * the ether header. 626 */ 627 static void 628 ether_input(struct ifnet *ifp, struct mbuf *m) 629 { 630 struct ifqueue *inq; 631 u_int16_t etype; 632 int s; 633 struct ether_header *eh; 634 struct mbuf *n; 635 #if defined (ISO) || defined (LLC) || defined(NETATALK) 636 struct llc *l; 637 #endif 638 639 if ((ifp->if_flags & IFF_UP) == 0) { 640 m_freem(m); 641 return; 642 } 643 644 eh = mtod(m, struct ether_header *); 645 etype = ntohs(eh->ether_type); 646 647 /* 648 * Determine if the packet is within its size limits. 649 */ 650 if (m->m_pkthdr.len > ETHER_MAX_FRAME(etype, m->m_flags & M_HASFCS)) { 651 printf("%s: discarding oversize frame (len=%d)\n", 652 ifp->if_xname, m->m_pkthdr.len); 653 m_freem(m); 654 return; 655 } 656 657 ifp->if_lastchange = time; 658 ifp->if_ibytes += m->m_pkthdr.len; 659 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 660 if (memcmp(etherbroadcastaddr, 661 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 662 m->m_flags |= M_BCAST; 663 else 664 m->m_flags |= M_MCAST; 665 ifp->if_imcasts++; 666 } 667 668 #if NBRIDGE > 0 669 /* 670 * Tap the packet off here for a bridge. bridge_input() 671 * will return NULL if it has consumed the packet, otherwise 672 * it gets processed as normal. Note that bridge_input() 673 * will always return the original packet if we need to 674 * process it locally. 675 */ 676 if (ifp->if_bridge) { 677 m = bridge_input(ifp, m); 678 if (m == NULL) 679 return; 680 681 /* 682 * Bridge has determined that the packet is for us. 683 * Update our interface pointer -- we may have had 684 * to "bridge" the packet locally. 685 */ 686 ifp = m->m_pkthdr.rcvif; 687 } 688 #endif /* NBRIDGE > 0 */ 689 690 /* 691 * XXX This comparison is redundant if we are a bridge 692 * XXX and processing the packet locally. 693 */ 694 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0 && 695 (ifp->if_flags & IFF_PROMISC) != 0 && 696 memcmp(LLADDR(ifp->if_sadl), eh->ether_dhost, 697 ETHER_ADDR_LEN) != 0) { 698 m_freem(m); 699 return; 700 } 701 702 #ifdef PFIL_HOOKS 703 if (pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 704 return; 705 if (m == NULL) 706 return; 707 708 eh = mtod(m, struct ether_header *); 709 etype = ntohs(eh->ether_type); 710 #endif 711 712 /* Check if the mbuf has a VLAN tag */ 713 n = m_aux_find(m, AF_LINK, ETHERTYPE_VLAN); 714 if (n) { 715 #if NVLAN > 0 716 /* 717 * vlan_input() will either recursively call ether_input() 718 * or drop the packet. 719 */ 720 if (((struct ethercom *)ifp)->ec_nvlans != 0) 721 vlan_input(ifp, m); 722 else 723 #endif 724 m_freem(m); 725 return; 726 } 727 728 /* 729 * Handle protocols that expect to have the Ethernet header 730 * (and possibly FCS) intact. 731 */ 732 switch (etype) { 733 #if NVLAN > 0 734 case ETHERTYPE_VLAN: 735 /* 736 * vlan_input() will either recursively call ether_input() 737 * or drop the packet. 738 */ 739 if (((struct ethercom *)ifp)->ec_nvlans != 0) 740 vlan_input(ifp, m); 741 else 742 m_freem(m); 743 return; 744 #endif /* NVLAN > 0 */ 745 default: 746 /* Nothing. */ 747 } 748 749 /* Strip off the Ethernet header. */ 750 m_adj(m, sizeof(struct ether_header)); 751 752 /* If the CRC is still on the packet, trim it off. */ 753 if (m->m_flags & M_HASFCS) 754 m_adj(m, -ETHER_CRC_LEN); 755 756 switch (etype) { 757 #ifdef INET 758 case ETHERTYPE_IP: 759 #ifdef GATEWAY 760 if (ipflow_fastforward(m)) 761 return; 762 #endif 763 schednetisr(NETISR_IP); 764 inq = &ipintrq; 765 break; 766 767 case ETHERTYPE_ARP: 768 schednetisr(NETISR_ARP); 769 inq = &arpintrq; 770 break; 771 772 case ETHERTYPE_REVARP: 773 revarpinput(m); /* XXX queue? */ 774 return; 775 #endif 776 #ifdef INET6 777 case ETHERTYPE_IPV6: 778 schednetisr(NETISR_IPV6); 779 inq = &ip6intrq; 780 break; 781 #endif 782 #ifdef NS 783 case ETHERTYPE_NS: 784 schednetisr(NETISR_NS); 785 inq = &nsintrq; 786 break; 787 788 #endif 789 #ifdef IPX 790 case ETHERTYPE_IPX: 791 schednetisr(NETISR_IPX); 792 inq = &ipxintrq; 793 break; 794 #endif 795 #ifdef NETATALK 796 case ETHERTYPE_ATALK: 797 schednetisr(NETISR_ATALK); 798 inq = &atintrq1; 799 break; 800 case ETHERTYPE_AARP: 801 /* probably this should be done with a NETISR as well */ 802 aarpinput(ifp, m); /* XXX */ 803 return; 804 #endif /* NETATALK */ 805 default: 806 #if defined (ISO) || defined (LLC) || defined (NETATALK) 807 if (etype > ETHERMTU) 808 goto dropanyway; 809 l = mtod(m, struct llc *); 810 switch (l->llc_dsap) { 811 #ifdef NETATALK 812 case LLC_SNAP_LSAP: 813 switch (l->llc_control) { 814 case LLC_UI: 815 if (l->llc_ssap != LLC_SNAP_LSAP) { 816 goto dropanyway; 817 } 818 819 if (Bcmp(&(l->llc_snap_org_code)[0], 820 at_org_code, sizeof(at_org_code)) == 0 && 821 ntohs(l->llc_snap_ether_type) == 822 ETHERTYPE_ATALK) { 823 inq = &atintrq2; 824 m_adj(m, sizeof(struct llc)); 825 schednetisr(NETISR_ATALK); 826 break; 827 } 828 829 if (Bcmp(&(l->llc_snap_org_code)[0], 830 aarp_org_code, 831 sizeof(aarp_org_code)) == 0 && 832 ntohs(l->llc_snap_ether_type) == 833 ETHERTYPE_AARP) { 834 m_adj( m, sizeof(struct llc)); 835 aarpinput(ifp, m); /* XXX */ 836 return; 837 } 838 839 default: 840 goto dropanyway; 841 } 842 break; 843 #endif /* NETATALK */ 844 #ifdef ISO 845 case LLC_ISO_LSAP: 846 switch (l->llc_control) { 847 case LLC_UI: 848 /* LLC_UI_P forbidden in class 1 service */ 849 if ((l->llc_dsap == LLC_ISO_LSAP) && 850 (l->llc_ssap == LLC_ISO_LSAP)) { 851 /* LSAP for ISO */ 852 if (m->m_pkthdr.len > etype) 853 m_adj(m, etype - m->m_pkthdr.len); 854 m->m_data += 3; /* XXX */ 855 m->m_len -= 3; /* XXX */ 856 m->m_pkthdr.len -= 3; /* XXX */ 857 M_PREPEND(m, sizeof *eh, M_DONTWAIT); 858 if (m == 0) 859 return; 860 *mtod(m, struct ether_header *) = *eh; 861 #ifdef ARGO_DEBUG 862 if (argo_debug[D_ETHER]) 863 printf("clnp packet"); 864 #endif 865 schednetisr(NETISR_ISO); 866 inq = &clnlintrq; 867 break; 868 } 869 goto dropanyway; 870 871 case LLC_XID: 872 case LLC_XID_P: 873 if(m->m_len < 6) 874 goto dropanyway; 875 l->llc_window = 0; 876 l->llc_fid = 9; 877 l->llc_class = 1; 878 l->llc_dsap = l->llc_ssap = 0; 879 /* Fall through to */ 880 case LLC_TEST: 881 case LLC_TEST_P: 882 { 883 struct sockaddr sa; 884 struct ether_header *eh2; 885 int i; 886 u_char c = l->llc_dsap; 887 888 l->llc_dsap = l->llc_ssap; 889 l->llc_ssap = c; 890 if (m->m_flags & (M_BCAST | M_MCAST)) 891 bcopy(LLADDR(ifp->if_sadl), 892 (caddr_t)eh->ether_dhost, 6); 893 sa.sa_family = AF_UNSPEC; 894 sa.sa_len = sizeof(sa); 895 eh2 = (struct ether_header *)sa.sa_data; 896 for (i = 0; i < 6; i++) { 897 eh2->ether_shost[i] = c = 898 eh->ether_dhost[i]; 899 eh2->ether_dhost[i] = 900 eh->ether_dhost[i] = 901 eh->ether_shost[i]; 902 eh->ether_shost[i] = c; 903 } 904 ifp->if_output(ifp, m, &sa, NULL); 905 return; 906 } 907 default: 908 m_freem(m); 909 return; 910 } 911 break; 912 #endif /* ISO */ 913 #ifdef LLC 914 case LLC_X25_LSAP: 915 { 916 if (m->m_pkthdr.len > etype) 917 m_adj(m, etype - m->m_pkthdr.len); 918 M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT); 919 if (m == 0) 920 return; 921 if ( !sdl_sethdrif(ifp, eh->ether_shost, LLC_X25_LSAP, 922 eh->ether_dhost, LLC_X25_LSAP, 6, 923 mtod(m, struct sdl_hdr *))) 924 panic("ETHER cons addr failure"); 925 mtod(m, struct sdl_hdr *)->sdlhdr_len = etype; 926 #ifdef LLC_DEBUG 927 printf("llc packet\n"); 928 #endif /* LLC_DEBUG */ 929 schednetisr(NETISR_CCITT); 930 inq = &llcintrq; 931 break; 932 } 933 #endif /* LLC */ 934 dropanyway: 935 default: 936 m_freem(m); 937 return; 938 } 939 #else /* ISO || LLC || NETATALK*/ 940 m_freem(m); 941 return; 942 #endif /* ISO || LLC || NETATALK*/ 943 } 944 945 s = splimp(); 946 if (IF_QFULL(inq)) { 947 IF_DROP(inq); 948 m_freem(m); 949 } else 950 IF_ENQUEUE(inq, m); 951 splx(s); 952 } 953 954 /* 955 * Convert Ethernet address to printable (loggable) representation. 956 */ 957 static char digits[] = "0123456789abcdef"; 958 char * 959 ether_sprintf(const u_char *ap) 960 { 961 static char etherbuf[18]; 962 char *cp = etherbuf; 963 int i; 964 965 for (i = 0; i < 6; i++) { 966 *cp++ = digits[*ap >> 4]; 967 *cp++ = digits[*ap++ & 0xf]; 968 *cp++ = ':'; 969 } 970 *--cp = 0; 971 return (etherbuf); 972 } 973 974 /* 975 * Perform common duties while attaching to interface list 976 */ 977 void 978 ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 979 { 980 981 ifp->if_type = IFT_ETHER; 982 ifp->if_addrlen = ETHER_ADDR_LEN; 983 ifp->if_hdrlen = 14; 984 ifp->if_dlt = DLT_EN10MB; 985 ifp->if_mtu = ETHERMTU; 986 ifp->if_output = ether_output; 987 ifp->if_input = ether_input; 988 if (ifp->if_baudrate == 0) 989 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 990 991 if_alloc_sadl(ifp); 992 memcpy(LLADDR(ifp->if_sadl), lla, ifp->if_addrlen); 993 994 LIST_INIT(&((struct ethercom *)ifp)->ec_multiaddrs); 995 ifp->if_broadcastaddr = etherbroadcastaddr; 996 #if NBPFILTER > 0 997 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 998 #endif 999 } 1000 1001 void 1002 ether_ifdetach(struct ifnet *ifp) 1003 { 1004 struct ethercom *ec = (void *) ifp; 1005 struct ether_multi *enm; 1006 int s; 1007 1008 #if NBPFILTER > 0 1009 bpfdetach(ifp); 1010 #endif 1011 1012 #if NVLAN > 0 1013 if (ec->ec_nvlans) 1014 vlan_ifdetach(ifp); 1015 #endif 1016 1017 s = splimp(); 1018 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1019 LIST_REMOVE(enm, enm_list); 1020 free(enm, M_IFADDR); 1021 ec->ec_multicnt--; 1022 } 1023 splx(s); 1024 1025 if_free_sadl(ifp); 1026 } 1027 1028 #if 0 1029 /* 1030 * This is for reference. We have a table-driven version 1031 * of the little-endian crc32 generator, which is faster 1032 * than the double-loop. 1033 */ 1034 u_int32_t 1035 ether_crc32_le(const u_int8_t *buf, size_t len) 1036 { 1037 u_int32_t c, crc, carry; 1038 size_t i, j; 1039 1040 crc = 0xffffffffU; /* initial value */ 1041 1042 for (i = 0; i < len; i++) { 1043 c = buf[i]; 1044 for (j = 0; j < 8; j++) { 1045 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1046 crc >>= 1; 1047 c >>= 1; 1048 if (carry) 1049 crc = (crc ^ ETHER_CRC_POLY_LE); 1050 } 1051 } 1052 1053 return (crc); 1054 } 1055 #else 1056 u_int32_t 1057 ether_crc32_le(const u_int8_t *buf, size_t len) 1058 { 1059 static const u_int32_t crctab[] = { 1060 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1061 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1062 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1063 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1064 }; 1065 u_int32_t crc; 1066 int i; 1067 1068 crc = 0xffffffffU; /* initial value */ 1069 1070 for (i = 0; i < len; i++) { 1071 crc ^= buf[i]; 1072 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1073 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1074 } 1075 1076 return (crc); 1077 } 1078 #endif 1079 1080 u_int32_t 1081 ether_crc32_be(const u_int8_t *buf, size_t len) 1082 { 1083 u_int32_t c, crc, carry; 1084 size_t i, j; 1085 1086 crc = 0xffffffffU; /* initial value */ 1087 1088 for (i = 0; i < len; i++) { 1089 c = buf[i]; 1090 for (j = 0; j < 8; j++) { 1091 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1092 crc <<= 1; 1093 c >>= 1; 1094 if (carry) 1095 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1096 } 1097 } 1098 1099 return (crc); 1100 } 1101 1102 #ifdef INET 1103 u_char ether_ipmulticast_min[6] = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1104 u_char ether_ipmulticast_max[6] = { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1105 #endif 1106 #ifdef INET6 1107 u_char ether_ip6multicast_min[6] = { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1108 u_char ether_ip6multicast_max[6] = { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1109 #endif 1110 1111 /* 1112 * Convert a sockaddr into an Ethernet address or range of Ethernet 1113 * addresses. 1114 */ 1115 int 1116 ether_multiaddr(struct sockaddr *sa, u_int8_t addrlo[ETHER_ADDR_LEN], 1117 u_int8_t addrhi[ETHER_ADDR_LEN]) 1118 { 1119 #ifdef INET 1120 struct sockaddr_in *sin; 1121 #endif /* INET */ 1122 #ifdef INET6 1123 struct sockaddr_in6 *sin6; 1124 #endif /* INET6 */ 1125 1126 switch (sa->sa_family) { 1127 1128 case AF_UNSPEC: 1129 bcopy(sa->sa_data, addrlo, ETHER_ADDR_LEN); 1130 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1131 break; 1132 1133 #ifdef INET 1134 case AF_INET: 1135 sin = satosin(sa); 1136 if (sin->sin_addr.s_addr == INADDR_ANY) { 1137 /* 1138 * An IP address of INADDR_ANY means listen to 1139 * or stop listening to all of the Ethernet 1140 * multicast addresses used for IP. 1141 * (This is for the sake of IP multicast routers.) 1142 */ 1143 bcopy(ether_ipmulticast_min, addrlo, ETHER_ADDR_LEN); 1144 bcopy(ether_ipmulticast_max, addrhi, ETHER_ADDR_LEN); 1145 } 1146 else { 1147 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1148 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1149 } 1150 break; 1151 #endif 1152 #ifdef INET6 1153 case AF_INET6: 1154 sin6 = satosin6(sa); 1155 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1156 /* 1157 * An IP6 address of 0 means listen to or stop 1158 * listening to all of the Ethernet multicast 1159 * address used for IP6. 1160 * (This is used for multicast routers.) 1161 */ 1162 bcopy(ether_ip6multicast_min, addrlo, ETHER_ADDR_LEN); 1163 bcopy(ether_ip6multicast_max, addrhi, ETHER_ADDR_LEN); 1164 } else { 1165 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1166 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1167 } 1168 break; 1169 #endif 1170 1171 default: 1172 return (EAFNOSUPPORT); 1173 } 1174 return (0); 1175 } 1176 1177 /* 1178 * Add an Ethernet multicast address or range of addresses to the list for a 1179 * given interface. 1180 */ 1181 int 1182 ether_addmulti(struct ifreq *ifr, struct ethercom *ec) 1183 { 1184 struct ether_multi *enm; 1185 u_char addrlo[ETHER_ADDR_LEN]; 1186 u_char addrhi[ETHER_ADDR_LEN]; 1187 int s = splimp(), error; 1188 1189 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1190 if (error != 0) { 1191 splx(s); 1192 return (error); 1193 } 1194 1195 /* 1196 * Verify that we have valid Ethernet multicast addresses. 1197 */ 1198 if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) { 1199 splx(s); 1200 return (EINVAL); 1201 } 1202 /* 1203 * See if the address range is already in the list. 1204 */ 1205 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1206 if (enm != NULL) { 1207 /* 1208 * Found it; just increment the reference count. 1209 */ 1210 ++enm->enm_refcount; 1211 splx(s); 1212 return (0); 1213 } 1214 /* 1215 * New address or range; malloc a new multicast record 1216 * and link it into the interface's multicast list. 1217 */ 1218 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1219 if (enm == NULL) { 1220 splx(s); 1221 return (ENOBUFS); 1222 } 1223 bcopy(addrlo, enm->enm_addrlo, 6); 1224 bcopy(addrhi, enm->enm_addrhi, 6); 1225 enm->enm_ec = ec; 1226 enm->enm_refcount = 1; 1227 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1228 ec->ec_multicnt++; 1229 splx(s); 1230 /* 1231 * Return ENETRESET to inform the driver that the list has changed 1232 * and its reception filter should be adjusted accordingly. 1233 */ 1234 return (ENETRESET); 1235 } 1236 1237 /* 1238 * Delete a multicast address record. 1239 */ 1240 int 1241 ether_delmulti(struct ifreq *ifr, struct ethercom *ec) 1242 { 1243 struct ether_multi *enm; 1244 u_char addrlo[ETHER_ADDR_LEN]; 1245 u_char addrhi[ETHER_ADDR_LEN]; 1246 int s = splimp(), error; 1247 1248 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1249 if (error != 0) { 1250 splx(s); 1251 return (error); 1252 } 1253 1254 /* 1255 * Look ur the address in our list. 1256 */ 1257 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1258 if (enm == NULL) { 1259 splx(s); 1260 return (ENXIO); 1261 } 1262 if (--enm->enm_refcount != 0) { 1263 /* 1264 * Still some claims to this record. 1265 */ 1266 splx(s); 1267 return (0); 1268 } 1269 /* 1270 * No remaining claims to this record; unlink and free it. 1271 */ 1272 LIST_REMOVE(enm, enm_list); 1273 free(enm, M_IFMADDR); 1274 ec->ec_multicnt--; 1275 splx(s); 1276 /* 1277 * Return ENETRESET to inform the driver that the list has changed 1278 * and its reception filter should be adjusted accordingly. 1279 */ 1280 return (ENETRESET); 1281 } 1282 1283 /* 1284 * Common ioctls for Ethernet interfaces. Note, we must be 1285 * called at splnet(). 1286 */ 1287 int 1288 ether_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1289 { 1290 struct ethercom *ec = (void *) ifp; 1291 struct ifreq *ifr = (struct ifreq *)data; 1292 struct ifaddr *ifa = (struct ifaddr *)data; 1293 int error = 0; 1294 1295 switch (cmd) { 1296 case SIOCSIFADDR: 1297 ifp->if_flags |= IFF_UP; 1298 switch (ifa->ifa_addr->sa_family) { 1299 case AF_LINK: 1300 { 1301 struct sockaddr_dl *sdl = 1302 (struct sockaddr_dl *) ifa->ifa_addr; 1303 1304 if (sdl->sdl_type != IFT_ETHER || 1305 sdl->sdl_alen != ifp->if_addrlen) { 1306 error = EINVAL; 1307 break; 1308 } 1309 1310 memcpy(LLADDR(ifp->if_sadl), LLADDR(sdl), 1311 ifp->if_addrlen); 1312 1313 /* Set new address. */ 1314 error = (*ifp->if_init)(ifp); 1315 break; 1316 } 1317 #ifdef INET 1318 case AF_INET: 1319 if ((error = (*ifp->if_init)(ifp)) != 0) 1320 break; 1321 arp_ifinit(ifp, ifa); 1322 break; 1323 #endif /* INET */ 1324 #ifdef NS 1325 case AF_NS: 1326 { 1327 struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; 1328 1329 if (ns_nullhost(*ina)) 1330 ina->x_host = *(union ns_host *) 1331 LLADDR(ifp->if_sadl); 1332 else 1333 memcpy(LLADDR(ifp->if_sadl), 1334 ina->x_host.c_host, ifp->if_addrlen); 1335 /* Set new address. */ 1336 error = (*ifp->if_init)(ifp); 1337 break; 1338 } 1339 #endif /* NS */ 1340 default: 1341 error = (*ifp->if_init)(ifp); 1342 break; 1343 } 1344 break; 1345 1346 case SIOCGIFADDR: 1347 memcpy(((struct sockaddr *)&ifr->ifr_data)->sa_data, 1348 LLADDR(ifp->if_sadl), ETHER_ADDR_LEN); 1349 break; 1350 1351 case SIOCSIFMTU: 1352 if (ifr->ifr_mtu > ETHERMTU) 1353 error = EINVAL; 1354 else 1355 ifp->if_mtu = ifr->ifr_mtu; 1356 break; 1357 1358 case SIOCSIFFLAGS: 1359 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_RUNNING) { 1360 /* 1361 * If interface is marked down and it is running, 1362 * then stop and disable it. 1363 */ 1364 (*ifp->if_stop)(ifp, 1); 1365 } else if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_UP) { 1366 /* 1367 * If interface is marked up and it is stopped, then 1368 * start it. 1369 */ 1370 error = (*ifp->if_init)(ifp); 1371 } else if ((ifp->if_flags & IFF_UP) != 0) { 1372 /* 1373 * Reset the interface to pick up changes in any other 1374 * flags that affect the hardware state. 1375 */ 1376 error = (*ifp->if_init)(ifp); 1377 } 1378 break; 1379 1380 case SIOCADDMULTI: 1381 error = ether_addmulti(ifr, ec); 1382 break; 1383 1384 case SIOCDELMULTI: 1385 error = ether_delmulti(ifr, ec); 1386 break; 1387 1388 default: 1389 error = ENOTTY; 1390 } 1391 1392 return (error); 1393 } 1394
Indexes created Tue Sep 23 02:09:52 GMT 2025