if_ethersubr.c revision 1.80
1 /* $NetBSD: if_ethersubr.c,v 1.80 2001/04/27 00:14:02 marcus 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 = splnet(); 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 /* If the CRC is still on the packet, trim it off. */ 658 if (m->m_flags & M_HASFCS) { 659 m_adj(m, -ETHER_CRC_LEN); 660 m->m_flags &= ~M_HASFCS; 661 } 662 663 ifp->if_lastchange = time; 664 ifp->if_ibytes += m->m_pkthdr.len; 665 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 666 if (memcmp(etherbroadcastaddr, 667 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 668 m->m_flags |= M_BCAST; 669 else 670 m->m_flags |= M_MCAST; 671 ifp->if_imcasts++; 672 } 673 674 #if NBRIDGE > 0 675 /* 676 * Tap the packet off here for a bridge. bridge_input() 677 * will return NULL if it has consumed the packet, otherwise 678 * it gets processed as normal. Note that bridge_input() 679 * will always return the original packet if we need to 680 * process it locally. 681 */ 682 if (ifp->if_bridge) { 683 m = bridge_input(ifp, m); 684 if (m == NULL) 685 return; 686 687 /* 688 * Bridge has determined that the packet is for us. 689 * Update our interface pointer -- we may have had 690 * to "bridge" the packet locally. 691 */ 692 ifp = m->m_pkthdr.rcvif; 693 } 694 #endif /* NBRIDGE > 0 */ 695 696 /* 697 * XXX This comparison is redundant if we are a bridge 698 * XXX and processing the packet locally. 699 */ 700 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0 && 701 (ifp->if_flags & IFF_PROMISC) != 0 && 702 memcmp(LLADDR(ifp->if_sadl), eh->ether_dhost, 703 ETHER_ADDR_LEN) != 0) { 704 m_freem(m); 705 return; 706 } 707 708 #ifdef PFIL_HOOKS 709 if (pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 710 return; 711 if (m == NULL) 712 return; 713 714 eh = mtod(m, struct ether_header *); 715 etype = ntohs(eh->ether_type); 716 #endif 717 718 /* Check if the mbuf has a VLAN tag */ 719 n = m_aux_find(m, AF_LINK, ETHERTYPE_VLAN); 720 if (n) { 721 #if NVLAN > 0 722 /* 723 * vlan_input() will either recursively call ether_input() 724 * or drop the packet. 725 */ 726 if (((struct ethercom *)ifp)->ec_nvlans != 0) 727 vlan_input(ifp, m); 728 else 729 #endif 730 m_freem(m); 731 return; 732 } 733 734 /* 735 * Handle protocols that expect to have the Ethernet header 736 * (and possibly FCS) intact. 737 */ 738 switch (etype) { 739 #if NVLAN > 0 740 case ETHERTYPE_VLAN: 741 /* 742 * vlan_input() will either recursively call ether_input() 743 * or drop the packet. 744 */ 745 if (((struct ethercom *)ifp)->ec_nvlans != 0) 746 vlan_input(ifp, m); 747 else 748 m_freem(m); 749 return; 750 #endif /* NVLAN > 0 */ 751 default: 752 ; /* Nothing. */ 753 } 754 755 /* Strip off the Ethernet header. */ 756 m_adj(m, sizeof(struct ether_header)); 757 758 /* If the CRC is still on the packet, trim it off. */ 759 if (m->m_flags & M_HASFCS) { 760 m_adj(m, -ETHER_CRC_LEN); 761 m->m_flags &= ~M_HASFCS; 762 } 763 764 switch (etype) { 765 #ifdef INET 766 case ETHERTYPE_IP: 767 #ifdef GATEWAY 768 if (ipflow_fastforward(m)) 769 return; 770 #endif 771 schednetisr(NETISR_IP); 772 inq = &ipintrq; 773 break; 774 775 case ETHERTYPE_ARP: 776 schednetisr(NETISR_ARP); 777 inq = &arpintrq; 778 break; 779 780 case ETHERTYPE_REVARP: 781 revarpinput(m); /* XXX queue? */ 782 return; 783 #endif 784 #ifdef INET6 785 case ETHERTYPE_IPV6: 786 schednetisr(NETISR_IPV6); 787 inq = &ip6intrq; 788 break; 789 #endif 790 #ifdef NS 791 case ETHERTYPE_NS: 792 schednetisr(NETISR_NS); 793 inq = &nsintrq; 794 break; 795 796 #endif 797 #ifdef IPX 798 case ETHERTYPE_IPX: 799 schednetisr(NETISR_IPX); 800 inq = &ipxintrq; 801 break; 802 #endif 803 #ifdef NETATALK 804 case ETHERTYPE_ATALK: 805 schednetisr(NETISR_ATALK); 806 inq = &atintrq1; 807 break; 808 case ETHERTYPE_AARP: 809 /* probably this should be done with a NETISR as well */ 810 aarpinput(ifp, m); /* XXX */ 811 return; 812 #endif /* NETATALK */ 813 default: 814 #if defined (ISO) || defined (LLC) || defined (NETATALK) 815 if (etype > ETHERMTU) 816 goto dropanyway; 817 l = mtod(m, struct llc *); 818 switch (l->llc_dsap) { 819 #ifdef NETATALK 820 case LLC_SNAP_LSAP: 821 switch (l->llc_control) { 822 case LLC_UI: 823 if (l->llc_ssap != LLC_SNAP_LSAP) { 824 goto dropanyway; 825 } 826 827 if (Bcmp(&(l->llc_snap_org_code)[0], 828 at_org_code, sizeof(at_org_code)) == 0 && 829 ntohs(l->llc_snap_ether_type) == 830 ETHERTYPE_ATALK) { 831 inq = &atintrq2; 832 m_adj(m, sizeof(struct llc)); 833 schednetisr(NETISR_ATALK); 834 break; 835 } 836 837 if (Bcmp(&(l->llc_snap_org_code)[0], 838 aarp_org_code, 839 sizeof(aarp_org_code)) == 0 && 840 ntohs(l->llc_snap_ether_type) == 841 ETHERTYPE_AARP) { 842 m_adj( m, sizeof(struct llc)); 843 aarpinput(ifp, m); /* XXX */ 844 return; 845 } 846 847 default: 848 goto dropanyway; 849 } 850 break; 851 #endif /* NETATALK */ 852 #ifdef ISO 853 case LLC_ISO_LSAP: 854 switch (l->llc_control) { 855 case LLC_UI: 856 /* LLC_UI_P forbidden in class 1 service */ 857 if ((l->llc_dsap == LLC_ISO_LSAP) && 858 (l->llc_ssap == LLC_ISO_LSAP)) { 859 /* LSAP for ISO */ 860 if (m->m_pkthdr.len > etype) 861 m_adj(m, etype - m->m_pkthdr.len); 862 m->m_data += 3; /* XXX */ 863 m->m_len -= 3; /* XXX */ 864 m->m_pkthdr.len -= 3; /* XXX */ 865 M_PREPEND(m, sizeof *eh, M_DONTWAIT); 866 if (m == 0) 867 return; 868 *mtod(m, struct ether_header *) = *eh; 869 #ifdef ARGO_DEBUG 870 if (argo_debug[D_ETHER]) 871 printf("clnp packet"); 872 #endif 873 schednetisr(NETISR_ISO); 874 inq = &clnlintrq; 875 break; 876 } 877 goto dropanyway; 878 879 case LLC_XID: 880 case LLC_XID_P: 881 if(m->m_len < 6) 882 goto dropanyway; 883 l->llc_window = 0; 884 l->llc_fid = 9; 885 l->llc_class = 1; 886 l->llc_dsap = l->llc_ssap = 0; 887 /* Fall through to */ 888 case LLC_TEST: 889 case LLC_TEST_P: 890 { 891 struct sockaddr sa; 892 struct ether_header *eh2; 893 int i; 894 u_char c = l->llc_dsap; 895 896 l->llc_dsap = l->llc_ssap; 897 l->llc_ssap = c; 898 if (m->m_flags & (M_BCAST | M_MCAST)) 899 bcopy(LLADDR(ifp->if_sadl), 900 (caddr_t)eh->ether_dhost, 6); 901 sa.sa_family = AF_UNSPEC; 902 sa.sa_len = sizeof(sa); 903 eh2 = (struct ether_header *)sa.sa_data; 904 for (i = 0; i < 6; i++) { 905 eh2->ether_shost[i] = c = 906 eh->ether_dhost[i]; 907 eh2->ether_dhost[i] = 908 eh->ether_dhost[i] = 909 eh->ether_shost[i]; 910 eh->ether_shost[i] = c; 911 } 912 ifp->if_output(ifp, m, &sa, NULL); 913 return; 914 } 915 default: 916 m_freem(m); 917 return; 918 } 919 break; 920 #endif /* ISO */ 921 #ifdef LLC 922 case LLC_X25_LSAP: 923 { 924 if (m->m_pkthdr.len > etype) 925 m_adj(m, etype - m->m_pkthdr.len); 926 M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT); 927 if (m == 0) 928 return; 929 if ( !sdl_sethdrif(ifp, eh->ether_shost, LLC_X25_LSAP, 930 eh->ether_dhost, LLC_X25_LSAP, 6, 931 mtod(m, struct sdl_hdr *))) 932 panic("ETHER cons addr failure"); 933 mtod(m, struct sdl_hdr *)->sdlhdr_len = etype; 934 #ifdef LLC_DEBUG 935 printf("llc packet\n"); 936 #endif /* LLC_DEBUG */ 937 schednetisr(NETISR_CCITT); 938 inq = &llcintrq; 939 break; 940 } 941 #endif /* LLC */ 942 dropanyway: 943 default: 944 m_freem(m); 945 return; 946 } 947 #else /* ISO || LLC || NETATALK*/ 948 m_freem(m); 949 return; 950 #endif /* ISO || LLC || NETATALK*/ 951 } 952 953 s = splnet(); 954 if (IF_QFULL(inq)) { 955 IF_DROP(inq); 956 m_freem(m); 957 } else 958 IF_ENQUEUE(inq, m); 959 splx(s); 960 } 961 962 /* 963 * Convert Ethernet address to printable (loggable) representation. 964 */ 965 static char digits[] = "0123456789abcdef"; 966 char * 967 ether_sprintf(const u_char *ap) 968 { 969 static char etherbuf[18]; 970 char *cp = etherbuf; 971 int i; 972 973 for (i = 0; i < 6; i++) { 974 *cp++ = digits[*ap >> 4]; 975 *cp++ = digits[*ap++ & 0xf]; 976 *cp++ = ':'; 977 } 978 *--cp = 0; 979 return (etherbuf); 980 } 981 982 /* 983 * Perform common duties while attaching to interface list 984 */ 985 void 986 ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 987 { 988 989 ifp->if_type = IFT_ETHER; 990 ifp->if_addrlen = ETHER_ADDR_LEN; 991 ifp->if_hdrlen = 14; 992 ifp->if_dlt = DLT_EN10MB; 993 ifp->if_mtu = ETHERMTU; 994 ifp->if_output = ether_output; 995 ifp->if_input = ether_input; 996 if (ifp->if_baudrate == 0) 997 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 998 999 if_alloc_sadl(ifp); 1000 memcpy(LLADDR(ifp->if_sadl), lla, ifp->if_addrlen); 1001 1002 LIST_INIT(&((struct ethercom *)ifp)->ec_multiaddrs); 1003 ifp->if_broadcastaddr = etherbroadcastaddr; 1004 #if NBPFILTER > 0 1005 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 1006 #endif 1007 } 1008 1009 void 1010 ether_ifdetach(struct ifnet *ifp) 1011 { 1012 struct ethercom *ec = (void *) ifp; 1013 struct ether_multi *enm; 1014 int s; 1015 1016 #if NBPFILTER > 0 1017 bpfdetach(ifp); 1018 #endif 1019 1020 #if NVLAN > 0 1021 if (ec->ec_nvlans) 1022 vlan_ifdetach(ifp); 1023 #endif 1024 1025 s = splnet(); 1026 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1027 LIST_REMOVE(enm, enm_list); 1028 free(enm, M_IFADDR); 1029 ec->ec_multicnt--; 1030 } 1031 splx(s); 1032 1033 if_free_sadl(ifp); 1034 } 1035 1036 #if 0 1037 /* 1038 * This is for reference. We have a table-driven version 1039 * of the little-endian crc32 generator, which is faster 1040 * than the double-loop. 1041 */ 1042 u_int32_t 1043 ether_crc32_le(const u_int8_t *buf, size_t len) 1044 { 1045 u_int32_t c, crc, carry; 1046 size_t i, j; 1047 1048 crc = 0xffffffffU; /* initial value */ 1049 1050 for (i = 0; i < len; i++) { 1051 c = buf[i]; 1052 for (j = 0; j < 8; j++) { 1053 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1054 crc >>= 1; 1055 c >>= 1; 1056 if (carry) 1057 crc = (crc ^ ETHER_CRC_POLY_LE); 1058 } 1059 } 1060 1061 return (crc); 1062 } 1063 #else 1064 u_int32_t 1065 ether_crc32_le(const u_int8_t *buf, size_t len) 1066 { 1067 static const u_int32_t crctab[] = { 1068 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1069 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1070 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1071 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1072 }; 1073 u_int32_t crc; 1074 int i; 1075 1076 crc = 0xffffffffU; /* initial value */ 1077 1078 for (i = 0; i < len; i++) { 1079 crc ^= buf[i]; 1080 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1081 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1082 } 1083 1084 return (crc); 1085 } 1086 #endif 1087 1088 u_int32_t 1089 ether_crc32_be(const u_int8_t *buf, size_t len) 1090 { 1091 u_int32_t c, crc, carry; 1092 size_t i, j; 1093 1094 crc = 0xffffffffU; /* initial value */ 1095 1096 for (i = 0; i < len; i++) { 1097 c = buf[i]; 1098 for (j = 0; j < 8; j++) { 1099 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1100 crc <<= 1; 1101 c >>= 1; 1102 if (carry) 1103 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1104 } 1105 } 1106 1107 return (crc); 1108 } 1109 1110 #ifdef INET 1111 u_char ether_ipmulticast_min[6] = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1112 u_char ether_ipmulticast_max[6] = { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1113 #endif 1114 #ifdef INET6 1115 u_char ether_ip6multicast_min[6] = { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1116 u_char ether_ip6multicast_max[6] = { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1117 #endif 1118 1119 /* 1120 * Convert a sockaddr into an Ethernet address or range of Ethernet 1121 * addresses. 1122 */ 1123 int 1124 ether_multiaddr(struct sockaddr *sa, u_int8_t addrlo[ETHER_ADDR_LEN], 1125 u_int8_t addrhi[ETHER_ADDR_LEN]) 1126 { 1127 #ifdef INET 1128 struct sockaddr_in *sin; 1129 #endif /* INET */ 1130 #ifdef INET6 1131 struct sockaddr_in6 *sin6; 1132 #endif /* INET6 */ 1133 1134 switch (sa->sa_family) { 1135 1136 case AF_UNSPEC: 1137 bcopy(sa->sa_data, addrlo, ETHER_ADDR_LEN); 1138 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1139 break; 1140 1141 #ifdef INET 1142 case AF_INET: 1143 sin = satosin(sa); 1144 if (sin->sin_addr.s_addr == INADDR_ANY) { 1145 /* 1146 * An IP address of INADDR_ANY means listen to 1147 * or stop listening to all of the Ethernet 1148 * multicast addresses used for IP. 1149 * (This is for the sake of IP multicast routers.) 1150 */ 1151 bcopy(ether_ipmulticast_min, addrlo, ETHER_ADDR_LEN); 1152 bcopy(ether_ipmulticast_max, addrhi, ETHER_ADDR_LEN); 1153 } 1154 else { 1155 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1156 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1157 } 1158 break; 1159 #endif 1160 #ifdef INET6 1161 case AF_INET6: 1162 sin6 = satosin6(sa); 1163 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1164 /* 1165 * An IP6 address of 0 means listen to or stop 1166 * listening to all of the Ethernet multicast 1167 * address used for IP6. 1168 * (This is used for multicast routers.) 1169 */ 1170 bcopy(ether_ip6multicast_min, addrlo, ETHER_ADDR_LEN); 1171 bcopy(ether_ip6multicast_max, addrhi, ETHER_ADDR_LEN); 1172 } else { 1173 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1174 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1175 } 1176 break; 1177 #endif 1178 1179 default: 1180 return (EAFNOSUPPORT); 1181 } 1182 return (0); 1183 } 1184 1185 /* 1186 * Add an Ethernet multicast address or range of addresses to the list for a 1187 * given interface. 1188 */ 1189 int 1190 ether_addmulti(struct ifreq *ifr, struct ethercom *ec) 1191 { 1192 struct ether_multi *enm; 1193 u_char addrlo[ETHER_ADDR_LEN]; 1194 u_char addrhi[ETHER_ADDR_LEN]; 1195 int s = splnet(), error; 1196 1197 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1198 if (error != 0) { 1199 splx(s); 1200 return (error); 1201 } 1202 1203 /* 1204 * Verify that we have valid Ethernet multicast addresses. 1205 */ 1206 if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) { 1207 splx(s); 1208 return (EINVAL); 1209 } 1210 /* 1211 * See if the address range is already in the list. 1212 */ 1213 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1214 if (enm != NULL) { 1215 /* 1216 * Found it; just increment the reference count. 1217 */ 1218 ++enm->enm_refcount; 1219 splx(s); 1220 return (0); 1221 } 1222 /* 1223 * New address or range; malloc a new multicast record 1224 * and link it into the interface's multicast list. 1225 */ 1226 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1227 if (enm == NULL) { 1228 splx(s); 1229 return (ENOBUFS); 1230 } 1231 bcopy(addrlo, enm->enm_addrlo, 6); 1232 bcopy(addrhi, enm->enm_addrhi, 6); 1233 enm->enm_ec = ec; 1234 enm->enm_refcount = 1; 1235 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1236 ec->ec_multicnt++; 1237 splx(s); 1238 /* 1239 * Return ENETRESET to inform the driver that the list has changed 1240 * and its reception filter should be adjusted accordingly. 1241 */ 1242 return (ENETRESET); 1243 } 1244 1245 /* 1246 * Delete a multicast address record. 1247 */ 1248 int 1249 ether_delmulti(struct ifreq *ifr, struct ethercom *ec) 1250 { 1251 struct ether_multi *enm; 1252 u_char addrlo[ETHER_ADDR_LEN]; 1253 u_char addrhi[ETHER_ADDR_LEN]; 1254 int s = splnet(), error; 1255 1256 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1257 if (error != 0) { 1258 splx(s); 1259 return (error); 1260 } 1261 1262 /* 1263 * Look ur the address in our list. 1264 */ 1265 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1266 if (enm == NULL) { 1267 splx(s); 1268 return (ENXIO); 1269 } 1270 if (--enm->enm_refcount != 0) { 1271 /* 1272 * Still some claims to this record. 1273 */ 1274 splx(s); 1275 return (0); 1276 } 1277 /* 1278 * No remaining claims to this record; unlink and free it. 1279 */ 1280 LIST_REMOVE(enm, enm_list); 1281 free(enm, M_IFMADDR); 1282 ec->ec_multicnt--; 1283 splx(s); 1284 /* 1285 * Return ENETRESET to inform the driver that the list has changed 1286 * and its reception filter should be adjusted accordingly. 1287 */ 1288 return (ENETRESET); 1289 } 1290 1291 /* 1292 * Common ioctls for Ethernet interfaces. Note, we must be 1293 * called at splnet(). 1294 */ 1295 int 1296 ether_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1297 { 1298 struct ethercom *ec = (void *) ifp; 1299 struct ifreq *ifr = (struct ifreq *)data; 1300 struct ifaddr *ifa = (struct ifaddr *)data; 1301 int error = 0; 1302 1303 switch (cmd) { 1304 case SIOCSIFADDR: 1305 ifp->if_flags |= IFF_UP; 1306 switch (ifa->ifa_addr->sa_family) { 1307 case AF_LINK: 1308 { 1309 struct sockaddr_dl *sdl = 1310 (struct sockaddr_dl *) ifa->ifa_addr; 1311 1312 if (sdl->sdl_type != IFT_ETHER || 1313 sdl->sdl_alen != ifp->if_addrlen) { 1314 error = EINVAL; 1315 break; 1316 } 1317 1318 memcpy(LLADDR(ifp->if_sadl), LLADDR(sdl), 1319 ifp->if_addrlen); 1320 1321 /* Set new address. */ 1322 error = (*ifp->if_init)(ifp); 1323 break; 1324 } 1325 #ifdef INET 1326 case AF_INET: 1327 if ((error = (*ifp->if_init)(ifp)) != 0) 1328 break; 1329 arp_ifinit(ifp, ifa); 1330 break; 1331 #endif /* INET */ 1332 #ifdef NS 1333 case AF_NS: 1334 { 1335 struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; 1336 1337 if (ns_nullhost(*ina)) 1338 ina->x_host = *(union ns_host *) 1339 LLADDR(ifp->if_sadl); 1340 else 1341 memcpy(LLADDR(ifp->if_sadl), 1342 ina->x_host.c_host, ifp->if_addrlen); 1343 /* Set new address. */ 1344 error = (*ifp->if_init)(ifp); 1345 break; 1346 } 1347 #endif /* NS */ 1348 default: 1349 error = (*ifp->if_init)(ifp); 1350 break; 1351 } 1352 break; 1353 1354 case SIOCGIFADDR: 1355 memcpy(((struct sockaddr *)&ifr->ifr_data)->sa_data, 1356 LLADDR(ifp->if_sadl), ETHER_ADDR_LEN); 1357 break; 1358 1359 case SIOCSIFMTU: 1360 if (ifr->ifr_mtu > ETHERMTU) 1361 error = EINVAL; 1362 else 1363 ifp->if_mtu = ifr->ifr_mtu; 1364 break; 1365 1366 case SIOCSIFFLAGS: 1367 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_RUNNING) { 1368 /* 1369 * If interface is marked down and it is running, 1370 * then stop and disable it. 1371 */ 1372 (*ifp->if_stop)(ifp, 1); 1373 } else if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_UP) { 1374 /* 1375 * If interface is marked up and it is stopped, then 1376 * start it. 1377 */ 1378 error = (*ifp->if_init)(ifp); 1379 } else if ((ifp->if_flags & IFF_UP) != 0) { 1380 /* 1381 * Reset the interface to pick up changes in any other 1382 * flags that affect the hardware state. 1383 */ 1384 error = (*ifp->if_init)(ifp); 1385 } 1386 break; 1387 1388 case SIOCADDMULTI: 1389 error = ether_addmulti(ifr, ec); 1390 break; 1391 1392 case SIOCDELMULTI: 1393 error = ether_delmulti(ifr, ec); 1394 break; 1395 1396 default: 1397 error = ENOTTY; 1398 } 1399 1400 return (error); 1401 } 1402
Indexes created Tue Sep 23 14:10:03 GMT 2025