if_ethersubr.c revision 1.77
1 /* $NetBSD: if_ethersubr.c,v 1.77 2001/04/10 21:47:36 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 "bpfilter.h" 77 78 #include <sys/param.h> 79 #include <sys/systm.h> 80 #include <sys/kernel.h> 81 #include <sys/malloc.h> 82 #include <sys/mbuf.h> 83 #include <sys/protosw.h> 84 #include <sys/socket.h> 85 #include <sys/ioctl.h> 86 #include <sys/errno.h> 87 #include <sys/syslog.h> 88 89 #include <machine/cpu.h> 90 91 #include <net/if.h> 92 #include <net/netisr.h> 93 #include <net/route.h> 94 #include <net/if_llc.h> 95 #include <net/if_dl.h> 96 #include <net/if_types.h> 97 98 #if NBPFILTER > 0 99 #include <net/bpf.h> 100 #endif 101 102 #include <net/if_ether.h> 103 #if NVLAN > 0 104 #include <net/if_vlanvar.h> 105 #endif 106 107 #include <netinet/in.h> 108 #ifdef INET 109 #include <netinet/in_var.h> 110 #endif 111 #include <netinet/if_inarp.h> 112 113 #ifdef INET6 114 #ifndef INET 115 #include <netinet/in.h> 116 #endif 117 #include <netinet6/in6_var.h> 118 #include <netinet6/nd6.h> 119 #endif 120 121 #ifdef NS 122 #include <netns/ns.h> 123 #include <netns/ns_if.h> 124 #endif 125 126 #ifdef IPX 127 #include <netipx/ipx.h> 128 #include <netipx/ipx_if.h> 129 #endif 130 131 #ifdef ISO 132 #include <netiso/argo_debug.h> 133 #include <netiso/iso.h> 134 #include <netiso/iso_var.h> 135 #include <netiso/iso_snpac.h> 136 #endif 137 138 #ifdef LLC 139 #include <netccitt/dll.h> 140 #include <netccitt/llc_var.h> 141 #endif 142 143 #if defined(LLC) && defined(CCITT) 144 extern struct ifqueue pkintrq; 145 #endif 146 147 #ifdef NETATALK 148 #include <netatalk/at.h> 149 #include <netatalk/at_var.h> 150 #include <netatalk/at_extern.h> 151 152 #define llc_snap_org_code llc_un.type_snap.org_code 153 #define llc_snap_ether_type llc_un.type_snap.ether_type 154 155 extern u_char at_org_code[3]; 156 extern u_char aarp_org_code[3]; 157 #endif /* NETATALK */ 158 159 u_char etherbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 160 #define senderr(e) { error = (e); goto bad;} 161 162 #define SIN(x) ((struct sockaddr_in *)x) 163 164 static int ether_output __P((struct ifnet *, struct mbuf *, 165 struct sockaddr *, struct rtentry *)); 166 static void ether_input __P((struct ifnet *, struct mbuf *)); 167 168 /* 169 * Ethernet output routine. 170 * Encapsulate a packet of type family for the local net. 171 * Assumes that ifp is actually pointer to ethercom structure. 172 */ 173 static int 174 ether_output(struct ifnet *ifp, struct mbuf *m0, struct sockaddr *dst, 175 struct rtentry *rt0) 176 { 177 u_int16_t etype = 0; 178 int s, len, error = 0, hdrcmplt = 0; 179 u_char esrc[6], edst[6]; 180 struct mbuf *m = m0; 181 struct rtentry *rt; 182 struct mbuf *mcopy = (struct mbuf *)0; 183 struct ether_header *eh; 184 ALTQ_DECL(struct altq_pktattr pktattr;) 185 #ifdef INET 186 struct arphdr *ah; 187 #endif /* INET */ 188 #ifdef NETATALK 189 struct at_ifaddr *aa; 190 #endif /* NETATALK */ 191 short mflags; 192 193 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 194 senderr(ENETDOWN); 195 ifp->if_lastchange = time; 196 if ((rt = rt0) != NULL) { 197 if ((rt->rt_flags & RTF_UP) == 0) { 198 if ((rt0 = rt = rtalloc1(dst, 1)) != NULL) { 199 rt->rt_refcnt--; 200 if (rt->rt_ifp != ifp) 201 return (*rt->rt_ifp->if_output) 202 (ifp, m0, dst, rt); 203 } else 204 senderr(EHOSTUNREACH); 205 } 206 if ((rt->rt_flags & RTF_GATEWAY) && dst->sa_family != AF_NS) { 207 if (rt->rt_gwroute == 0) 208 goto lookup; 209 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 210 rtfree(rt); rt = rt0; 211 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1); 212 if ((rt = rt->rt_gwroute) == 0) 213 senderr(EHOSTUNREACH); 214 /* the "G" test below also prevents rt == rt0 */ 215 if ((rt->rt_flags & RTF_GATEWAY) || 216 (rt->rt_ifp != ifp)) { 217 rt->rt_refcnt--; 218 rt0->rt_gwroute = 0; 219 senderr(EHOSTUNREACH); 220 } 221 } 222 } 223 if (rt->rt_flags & RTF_REJECT) 224 if (rt->rt_rmx.rmx_expire == 0 || 225 time.tv_sec < rt->rt_rmx.rmx_expire) 226 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 227 } 228 229 switch (dst->sa_family) { 230 231 #ifdef INET 232 case AF_INET: 233 if (m->m_flags & M_BCAST) 234 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 235 sizeof(edst)); 236 237 else if (m->m_flags & M_MCAST) { 238 ETHER_MAP_IP_MULTICAST(&SIN(dst)->sin_addr, 239 (caddr_t)edst) 240 241 } else if (!arpresolve(ifp, rt, m, dst, edst)) 242 return (0); /* if not yet resolved */ 243 /* If broadcasting on a simplex interface, loopback a copy */ 244 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 245 mcopy = m_copy(m, 0, (int)M_COPYALL); 246 etype = htons(ETHERTYPE_IP); 247 break; 248 249 case AF_ARP: 250 ah = mtod(m, struct arphdr *); 251 if (m->m_flags & M_BCAST) 252 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 253 sizeof(edst)); 254 else 255 bcopy((caddr_t)ar_tha(ah), 256 (caddr_t)edst, sizeof(edst)); 257 258 ah->ar_hrd = htons(ARPHRD_ETHER); 259 260 switch(ntohs(ah->ar_op)) { 261 case ARPOP_REVREQUEST: 262 case ARPOP_REVREPLY: 263 etype = htons(ETHERTYPE_REVARP); 264 break; 265 266 case ARPOP_REQUEST: 267 case ARPOP_REPLY: 268 default: 269 etype = htons(ETHERTYPE_ARP); 270 } 271 272 break; 273 #endif 274 #ifdef INET6 275 case AF_INET6: 276 #ifdef OLDIP6OUTPUT 277 if (!nd6_resolve(ifp, rt, m, dst, (u_char *)edst)) 278 return(0); /* if not yet resolves */ 279 #else 280 if (!nd6_storelladdr(ifp, rt, m, dst, (u_char *)edst)){ 281 /* something bad happened */ 282 return(0); 283 } 284 #endif /* OLDIP6OUTPUT */ 285 etype = htons(ETHERTYPE_IPV6); 286 break; 287 #endif 288 #ifdef NETATALK 289 case AF_APPLETALK: 290 if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) { 291 #ifdef NETATALKDEBUG 292 printf("aarpresolv failed\n"); 293 #endif /* NETATALKDEBUG */ 294 return (0); 295 } 296 /* 297 * ifaddr is the first thing in at_ifaddr 298 */ 299 aa = (struct at_ifaddr *) at_ifawithnet( 300 (struct sockaddr_at *)dst, ifp); 301 if (aa == NULL) 302 goto bad; 303 304 /* 305 * In the phase 2 case, we need to prepend an mbuf for the 306 * llc header. Since we must preserve the value of m, 307 * which is passed to us by value, we m_copy() the first 308 * mbuf, and use it for our llc header. 309 */ 310 if (aa->aa_flags & AFA_PHASE2) { 311 struct llc llc; 312 313 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 314 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 315 llc.llc_control = LLC_UI; 316 bcopy(at_org_code, llc.llc_snap_org_code, 317 sizeof(llc.llc_snap_org_code)); 318 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 319 bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc)); 320 } else { 321 etype = htons(ETHERTYPE_ATALK); 322 } 323 break; 324 #endif /* NETATALK */ 325 #ifdef NS 326 case AF_NS: 327 etype = htons(ETHERTYPE_NS); 328 bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host), 329 (caddr_t)edst, sizeof (edst)); 330 if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst))) 331 return (looutput(ifp, m, dst, rt)); 332 /* If broadcasting on a simplex interface, loopback a copy */ 333 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 334 mcopy = m_copy(m, 0, (int)M_COPYALL); 335 break; 336 #endif 337 #ifdef IPX 338 case AF_IPX: 339 etype = htons(ETHERTYPE_IPX); 340 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 341 (caddr_t)edst, sizeof (edst)); 342 /* If broadcasting on a simplex interface, loopback a copy */ 343 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 344 mcopy = m_copy(m, 0, (int)M_COPYALL); 345 break; 346 #endif 347 #ifdef ISO 348 case AF_ISO: { 349 int snpalen; 350 struct llc *l; 351 struct sockaddr_dl *sdl; 352 353 if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) && 354 sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) { 355 bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst)); 356 } else { 357 error = iso_snparesolve(ifp, (struct sockaddr_iso *)dst, 358 (char *)edst, &snpalen); 359 if (error) 360 goto bad; /* Not Resolved */ 361 } 362 /* If broadcasting on a simplex interface, loopback a copy */ 363 if (*edst & 1) 364 m->m_flags |= (M_BCAST|M_MCAST); 365 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) && 366 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 367 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 368 if (mcopy) { 369 eh = mtod(mcopy, struct ether_header *); 370 bcopy((caddr_t)edst, 371 (caddr_t)eh->ether_dhost, sizeof (edst)); 372 bcopy(LLADDR(ifp->if_sadl), 373 (caddr_t)eh->ether_shost, sizeof (edst)); 374 } 375 } 376 M_PREPEND(m, 3, M_DONTWAIT); 377 if (m == NULL) 378 return (0); 379 l = mtod(m, struct llc *); 380 l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP; 381 l->llc_control = LLC_UI; 382 #ifdef ARGO_DEBUG 383 if (argo_debug[D_ETHER]) { 384 int i; 385 printf("unoutput: sending pkt to: "); 386 for (i=0; i<6; i++) 387 printf("%x ", edst[i] & 0xff); 388 printf("\n"); 389 } 390 #endif 391 } break; 392 #endif /* ISO */ 393 #ifdef LLC 394 /* case AF_NSAP: */ 395 case AF_CCITT: { 396 struct sockaddr_dl *sdl = 397 (struct sockaddr_dl *) rt -> rt_gateway; 398 399 if (sdl && sdl->sdl_family == AF_LINK 400 && sdl->sdl_alen > 0) { 401 bcopy(LLADDR(sdl), (char *)edst, 402 sizeof(edst)); 403 } else goto bad; /* Not a link interface ? Funny ... */ 404 if ((ifp->if_flags & IFF_SIMPLEX) && (*edst & 1) && 405 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 406 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 407 if (mcopy) { 408 eh = mtod(mcopy, struct ether_header *); 409 bcopy((caddr_t)edst, 410 (caddr_t)eh->ether_dhost, sizeof (edst)); 411 bcopy(LLADDR(ifp->if_sadl), 412 (caddr_t)eh->ether_shost, sizeof (edst)); 413 } 414 } 415 #ifdef LLC_DEBUG 416 { 417 int i; 418 struct llc *l = mtod(m, struct llc *); 419 420 printf("ether_output: sending LLC2 pkt to: "); 421 for (i=0; i<6; i++) 422 printf("%x ", edst[i] & 0xff); 423 printf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n", 424 m->m_pkthdr.len, l->llc_dsap & 0xff, l->llc_ssap &0xff, 425 l->llc_control & 0xff); 426 427 } 428 #endif /* LLC_DEBUG */ 429 } break; 430 #endif /* LLC */ 431 432 case pseudo_AF_HDRCMPLT: 433 hdrcmplt = 1; 434 eh = (struct ether_header *)dst->sa_data; 435 bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, sizeof (esrc)); 436 /* FALLTHROUGH */ 437 438 case AF_UNSPEC: 439 eh = (struct ether_header *)dst->sa_data; 440 bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, sizeof (edst)); 441 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 442 etype = eh->ether_type; 443 break; 444 445 default: 446 printf("%s: can't handle af%d\n", ifp->if_xname, 447 dst->sa_family); 448 senderr(EAFNOSUPPORT); 449 } 450 451 if (mcopy) 452 (void) looutput(ifp, mcopy, dst, rt); 453 454 /* If no ether type is set, this must be a 802.2 formatted packet. 455 */ 456 if (etype == 0) 457 etype = htons(m->m_pkthdr.len); 458 /* 459 * Add local net header. If no space in first mbuf, 460 * allocate another. 461 */ 462 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 463 if (m == 0) 464 senderr(ENOBUFS); 465 eh = mtod(m, struct ether_header *); 466 bcopy((caddr_t)&etype,(caddr_t)&eh->ether_type, 467 sizeof(eh->ether_type)); 468 bcopy((caddr_t)edst, (caddr_t)eh->ether_dhost, sizeof (edst)); 469 if (hdrcmplt) 470 bcopy((caddr_t)esrc, (caddr_t)eh->ether_shost, 471 sizeof(eh->ether_shost)); 472 else 473 bcopy(LLADDR(ifp->if_sadl), (caddr_t)eh->ether_shost, 474 sizeof(eh->ether_shost)); 475 476 #ifdef PFIL_HOOKS 477 if ((error = pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 478 return (error); 479 if (m == NULL) 480 return (0); 481 #endif 482 483 #ifdef ALTQ 484 /* 485 * If ALTQ is enabled on the parent interface, do 486 * classification; the queueing discipline might not 487 * require classification, but might require the 488 * address family/header pointer in the pktattr. 489 */ 490 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 491 altq_etherclassify(&ifp->if_snd, m, &pktattr); 492 #endif 493 494 mflags = m->m_flags; 495 len = m->m_pkthdr.len; 496 s = splimp(); 497 /* 498 * Queue message on interface, and start output if interface 499 * not yet active. 500 */ 501 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, error); 502 if (error) { 503 /* mbuf is already freed */ 504 splx(s); 505 return (error); 506 } 507 ifp->if_obytes += len; 508 if (mflags & M_MCAST) 509 ifp->if_omcasts++; 510 if ((ifp->if_flags & IFF_OACTIVE) == 0) 511 (*ifp->if_start)(ifp); 512 splx(s); 513 return (error); 514 515 bad: 516 if (m) 517 m_freem(m); 518 return (error); 519 } 520 521 #ifdef ALTQ 522 /* 523 * This routine is a slight hack to allow a packet to be classified 524 * if the Ethernet headers are present. It will go away when ALTQ's 525 * classification engine understands link headers. 526 */ 527 void 528 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m, 529 struct altq_pktattr *pktattr) 530 { 531 struct ether_header *eh; 532 u_int16_t ether_type; 533 int hlen, af, hdrsize; 534 caddr_t hdr; 535 536 hlen = ETHER_HDR_LEN; 537 eh = mtod(m, struct ether_header *); 538 539 ether_type = htons(eh->ether_type); 540 541 if (ether_type < ETHERMTU) { 542 /* LLC/SNAP */ 543 struct llc *llc = (struct llc *)(eh + 1); 544 hlen += 8; 545 546 if (m->m_len < hlen || 547 llc->llc_dsap != LLC_SNAP_LSAP || 548 llc->llc_ssap != LLC_SNAP_LSAP || 549 llc->llc_control != LLC_UI) { 550 /* Not SNAP. */ 551 goto bad; 552 } 553 554 ether_type = htons(llc->llc_un.type_snap.ether_type); 555 } 556 557 switch (ether_type) { 558 case ETHERTYPE_IP: 559 af = AF_INET; 560 hdrsize = 20; /* sizeof(struct ip) */ 561 break; 562 563 case ETHERTYPE_IPV6: 564 af = AF_INET6; 565 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 566 break; 567 568 default: 569 af = AF_UNSPEC; 570 hdrsize = 0; 571 break; 572 } 573 574 if (m->m_len < (hlen + hdrsize)) { 575 /* 576 * Ethernet and protocol header not in a single 577 * mbuf. We can't cope with this situation right 578 * now (but it shouldn't ever happen, really, anyhow). 579 * XXX Should use m_pulldown(). 580 */ 581 printf("altq_etherclassify: headers span multiple mbufs\n"); 582 goto bad; 583 } 584 585 m->m_data += hlen; 586 m->m_len -= hlen; 587 588 hdr = mtod(m, caddr_t); 589 590 if (ALTQ_NEEDS_CLASSIFY(ifq)) 591 pktattr->pattr_class = 592 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 593 pktattr->pattr_af = af; 594 pktattr->pattr_hdr = hdr; 595 596 m->m_data -= hlen; 597 m->m_len += hlen; 598 599 return; 600 601 bad: 602 pktattr->pattr_class = NULL; 603 pktattr->pattr_hdr = NULL; 604 pktattr->pattr_af = AF_UNSPEC; 605 } 606 #endif /* ALTQ */ 607 608 /* 609 * Process a received Ethernet packet; 610 * the packet is in the mbuf chain m with 611 * the ether header. 612 */ 613 static void 614 ether_input(struct ifnet *ifp, struct mbuf *m) 615 { 616 struct ifqueue *inq; 617 u_int16_t etype; 618 int s; 619 struct ether_header *eh; 620 struct mbuf *n; 621 #if defined (ISO) || defined (LLC) || defined(NETATALK) 622 struct llc *l; 623 #endif 624 625 if ((ifp->if_flags & IFF_UP) == 0) { 626 m_freem(m); 627 return; 628 } 629 630 eh = mtod(m, struct ether_header *); 631 etype = ntohs(eh->ether_type); 632 633 /* 634 * Determine if the packet is within its size limits. 635 */ 636 if (m->m_pkthdr.len > ETHER_MAX_FRAME(etype, m->m_flags & M_HASFCS)) { 637 printf("%s: discarding oversize frame (len=%d)\n", 638 ifp->if_xname, m->m_pkthdr.len); 639 m_freem(m); 640 return; 641 } 642 643 #ifdef PFIL_HOOKS 644 if (pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 645 return; 646 if (m == NULL) 647 return; 648 649 eh = mtod(m, struct ether_header *); 650 etype = ntohs(eh->ether_type); 651 #endif 652 653 ifp->if_lastchange = time; 654 ifp->if_ibytes += m->m_pkthdr.len; 655 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 656 if (memcmp(etherbroadcastaddr, 657 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 658 m->m_flags |= M_BCAST; 659 else 660 m->m_flags |= M_MCAST; 661 ifp->if_imcasts++; 662 } else if ((ifp->if_flags & IFF_PROMISC) != 0 && 663 memcmp(LLADDR(ifp->if_sadl), eh->ether_dhost, 664 ETHER_ADDR_LEN) != 0) { 665 m_freem(m); 666 return; 667 } 668 669 /* Check if the mbuf has a VLAN tag */ 670 n = m_aux_find(m, AF_LINK, ETHERTYPE_VLAN); 671 if (n) { 672 #if NVLAN > 0 673 /* 674 * vlan_input() will either recursively call ether_input() 675 * or drop the packet. 676 */ 677 if (((struct ethercom *)ifp)->ec_nvlans != 0) 678 vlan_input(ifp, m); 679 else 680 #endif 681 m_freem(m); 682 return; 683 } 684 685 /* 686 * Handle protocols that expect to have the Ethernet header 687 * (and possibly FCS) intact. 688 */ 689 switch (etype) { 690 #if NVLAN > 0 691 case ETHERTYPE_VLAN: 692 /* 693 * vlan_input() will either recursively call ether_input() 694 * or drop the packet. 695 */ 696 if (((struct ethercom *)ifp)->ec_nvlans != 0) 697 vlan_input(ifp, m); 698 else 699 m_freem(m); 700 return; 701 #endif /* NVLAN > 0 */ 702 default: 703 /* Nothing. */ 704 } 705 706 /* Strip off the Ethernet header. */ 707 m_adj(m, sizeof(struct ether_header)); 708 709 /* If the CRC is still on the packet, trim it off. */ 710 if (m->m_flags & M_HASFCS) 711 m_adj(m, -ETHER_CRC_LEN); 712 713 switch (etype) { 714 #ifdef INET 715 case ETHERTYPE_IP: 716 #ifdef GATEWAY 717 if (ipflow_fastforward(m)) 718 return; 719 #endif 720 schednetisr(NETISR_IP); 721 inq = &ipintrq; 722 break; 723 724 case ETHERTYPE_ARP: 725 schednetisr(NETISR_ARP); 726 inq = &arpintrq; 727 break; 728 729 case ETHERTYPE_REVARP: 730 revarpinput(m); /* XXX queue? */ 731 return; 732 #endif 733 #ifdef INET6 734 case ETHERTYPE_IPV6: 735 schednetisr(NETISR_IPV6); 736 inq = &ip6intrq; 737 break; 738 #endif 739 #ifdef NS 740 case ETHERTYPE_NS: 741 schednetisr(NETISR_NS); 742 inq = &nsintrq; 743 break; 744 745 #endif 746 #ifdef IPX 747 case ETHERTYPE_IPX: 748 schednetisr(NETISR_IPX); 749 inq = &ipxintrq; 750 break; 751 #endif 752 #ifdef NETATALK 753 case ETHERTYPE_ATALK: 754 schednetisr(NETISR_ATALK); 755 inq = &atintrq1; 756 break; 757 case ETHERTYPE_AARP: 758 /* probably this should be done with a NETISR as well */ 759 aarpinput(ifp, m); /* XXX */ 760 return; 761 #endif /* NETATALK */ 762 default: 763 #if defined (ISO) || defined (LLC) || defined (NETATALK) 764 if (etype > ETHERMTU) 765 goto dropanyway; 766 l = mtod(m, struct llc *); 767 switch (l->llc_dsap) { 768 #ifdef NETATALK 769 case LLC_SNAP_LSAP: 770 switch (l->llc_control) { 771 case LLC_UI: 772 if (l->llc_ssap != LLC_SNAP_LSAP) { 773 goto dropanyway; 774 } 775 776 if (Bcmp(&(l->llc_snap_org_code)[0], 777 at_org_code, sizeof(at_org_code)) == 0 && 778 ntohs(l->llc_snap_ether_type) == 779 ETHERTYPE_ATALK) { 780 inq = &atintrq2; 781 m_adj(m, sizeof(struct llc)); 782 schednetisr(NETISR_ATALK); 783 break; 784 } 785 786 if (Bcmp(&(l->llc_snap_org_code)[0], 787 aarp_org_code, 788 sizeof(aarp_org_code)) == 0 && 789 ntohs(l->llc_snap_ether_type) == 790 ETHERTYPE_AARP) { 791 m_adj( m, sizeof(struct llc)); 792 aarpinput(ifp, m); /* XXX */ 793 return; 794 } 795 796 default: 797 goto dropanyway; 798 } 799 break; 800 #endif /* NETATALK */ 801 #ifdef ISO 802 case LLC_ISO_LSAP: 803 switch (l->llc_control) { 804 case LLC_UI: 805 /* LLC_UI_P forbidden in class 1 service */ 806 if ((l->llc_dsap == LLC_ISO_LSAP) && 807 (l->llc_ssap == LLC_ISO_LSAP)) { 808 /* LSAP for ISO */ 809 if (m->m_pkthdr.len > etype) 810 m_adj(m, etype - m->m_pkthdr.len); 811 m->m_data += 3; /* XXX */ 812 m->m_len -= 3; /* XXX */ 813 m->m_pkthdr.len -= 3; /* XXX */ 814 M_PREPEND(m, sizeof *eh, M_DONTWAIT); 815 if (m == 0) 816 return; 817 *mtod(m, struct ether_header *) = *eh; 818 #ifdef ARGO_DEBUG 819 if (argo_debug[D_ETHER]) 820 printf("clnp packet"); 821 #endif 822 schednetisr(NETISR_ISO); 823 inq = &clnlintrq; 824 break; 825 } 826 goto dropanyway; 827 828 case LLC_XID: 829 case LLC_XID_P: 830 if(m->m_len < 6) 831 goto dropanyway; 832 l->llc_window = 0; 833 l->llc_fid = 9; 834 l->llc_class = 1; 835 l->llc_dsap = l->llc_ssap = 0; 836 /* Fall through to */ 837 case LLC_TEST: 838 case LLC_TEST_P: 839 { 840 struct sockaddr sa; 841 struct ether_header *eh2; 842 int i; 843 u_char c = l->llc_dsap; 844 845 l->llc_dsap = l->llc_ssap; 846 l->llc_ssap = c; 847 if (m->m_flags & (M_BCAST | M_MCAST)) 848 bcopy(LLADDR(ifp->if_sadl), 849 (caddr_t)eh->ether_dhost, 6); 850 sa.sa_family = AF_UNSPEC; 851 sa.sa_len = sizeof(sa); 852 eh2 = (struct ether_header *)sa.sa_data; 853 for (i = 0; i < 6; i++) { 854 eh2->ether_shost[i] = c = 855 eh->ether_dhost[i]; 856 eh2->ether_dhost[i] = 857 eh->ether_dhost[i] = 858 eh->ether_shost[i]; 859 eh->ether_shost[i] = c; 860 } 861 ifp->if_output(ifp, m, &sa, NULL); 862 return; 863 } 864 default: 865 m_freem(m); 866 return; 867 } 868 break; 869 #endif /* ISO */ 870 #ifdef LLC 871 case LLC_X25_LSAP: 872 { 873 if (m->m_pkthdr.len > etype) 874 m_adj(m, etype - m->m_pkthdr.len); 875 M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT); 876 if (m == 0) 877 return; 878 if ( !sdl_sethdrif(ifp, eh->ether_shost, LLC_X25_LSAP, 879 eh->ether_dhost, LLC_X25_LSAP, 6, 880 mtod(m, struct sdl_hdr *))) 881 panic("ETHER cons addr failure"); 882 mtod(m, struct sdl_hdr *)->sdlhdr_len = etype; 883 #ifdef LLC_DEBUG 884 printf("llc packet\n"); 885 #endif /* LLC_DEBUG */ 886 schednetisr(NETISR_CCITT); 887 inq = &llcintrq; 888 break; 889 } 890 #endif /* LLC */ 891 dropanyway: 892 default: 893 m_freem(m); 894 return; 895 } 896 #else /* ISO || LLC || NETATALK*/ 897 m_freem(m); 898 return; 899 #endif /* ISO || LLC || NETATALK*/ 900 } 901 902 s = splimp(); 903 if (IF_QFULL(inq)) { 904 IF_DROP(inq); 905 m_freem(m); 906 } else 907 IF_ENQUEUE(inq, m); 908 splx(s); 909 } 910 911 /* 912 * Convert Ethernet address to printable (loggable) representation. 913 */ 914 static char digits[] = "0123456789abcdef"; 915 char * 916 ether_sprintf(const u_char *ap) 917 { 918 static char etherbuf[18]; 919 char *cp = etherbuf; 920 int i; 921 922 for (i = 0; i < 6; i++) { 923 *cp++ = digits[*ap >> 4]; 924 *cp++ = digits[*ap++ & 0xf]; 925 *cp++ = ':'; 926 } 927 *--cp = 0; 928 return (etherbuf); 929 } 930 931 /* 932 * Perform common duties while attaching to interface list 933 */ 934 void 935 ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 936 { 937 938 ifp->if_type = IFT_ETHER; 939 ifp->if_addrlen = ETHER_ADDR_LEN; 940 ifp->if_hdrlen = 14; 941 ifp->if_dlt = DLT_EN10MB; 942 ifp->if_mtu = ETHERMTU; 943 ifp->if_output = ether_output; 944 ifp->if_input = ether_input; 945 if (ifp->if_baudrate == 0) 946 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 947 948 if_alloc_sadl(ifp); 949 memcpy(LLADDR(ifp->if_sadl), lla, ifp->if_addrlen); 950 951 LIST_INIT(&((struct ethercom *)ifp)->ec_multiaddrs); 952 ifp->if_broadcastaddr = etherbroadcastaddr; 953 #if NBPFILTER > 0 954 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 955 #endif 956 } 957 958 void 959 ether_ifdetach(struct ifnet *ifp) 960 { 961 struct ethercom *ec = (void *) ifp; 962 struct ether_multi *enm; 963 int s; 964 965 #if NBPFILTER > 0 966 bpfdetach(ifp); 967 #endif 968 969 #if NVLAN > 0 970 if (ec->ec_nvlans) 971 vlan_ifdetach(ifp); 972 #endif 973 974 s = splimp(); 975 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 976 LIST_REMOVE(enm, enm_list); 977 free(enm, M_IFADDR); 978 ec->ec_multicnt--; 979 } 980 splx(s); 981 982 if_free_sadl(ifp); 983 } 984 985 #if 0 986 /* 987 * This is for reference. We have a table-driven version 988 * of the little-endian crc32 generator, which is faster 989 * than the double-loop. 990 */ 991 u_int32_t 992 ether_crc32_le(const u_int8_t *buf, size_t len) 993 { 994 u_int32_t c, crc, carry; 995 size_t i, j; 996 997 crc = 0xffffffffU; /* initial value */ 998 999 for (i = 0; i < len; i++) { 1000 c = buf[i]; 1001 for (j = 0; j < 8; j++) { 1002 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1003 crc >>= 1; 1004 c >>= 1; 1005 if (carry) 1006 crc = (crc ^ ETHER_CRC_POLY_LE); 1007 } 1008 } 1009 1010 return (crc); 1011 } 1012 #else 1013 u_int32_t 1014 ether_crc32_le(const u_int8_t *buf, size_t len) 1015 { 1016 static const u_int32_t crctab[] = { 1017 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1018 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1019 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1020 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1021 }; 1022 u_int32_t crc; 1023 int i; 1024 1025 crc = 0xffffffffU; /* initial value */ 1026 1027 for (i = 0; i < len; i++) { 1028 crc ^= buf[i]; 1029 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1030 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1031 } 1032 1033 return (crc); 1034 } 1035 #endif 1036 1037 u_int32_t 1038 ether_crc32_be(const u_int8_t *buf, size_t len) 1039 { 1040 u_int32_t c, crc, carry; 1041 size_t i, j; 1042 1043 crc = 0xffffffffU; /* initial value */ 1044 1045 for (i = 0; i < len; i++) { 1046 c = buf[i]; 1047 for (j = 0; j < 8; j++) { 1048 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1049 crc <<= 1; 1050 c >>= 1; 1051 if (carry) 1052 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1053 } 1054 } 1055 1056 return (crc); 1057 } 1058 1059 #ifdef INET 1060 u_char ether_ipmulticast_min[6] = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1061 u_char ether_ipmulticast_max[6] = { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1062 #endif 1063 #ifdef INET6 1064 u_char ether_ip6multicast_min[6] = { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1065 u_char ether_ip6multicast_max[6] = { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1066 #endif 1067 1068 /* 1069 * Convert a sockaddr into an Ethernet address or range of Ethernet 1070 * addresses. 1071 */ 1072 int 1073 ether_multiaddr(struct sockaddr *sa, u_int8_t addrlo[ETHER_ADDR_LEN], 1074 u_int8_t addrhi[ETHER_ADDR_LEN]) 1075 { 1076 #ifdef INET 1077 struct sockaddr_in *sin; 1078 #endif /* INET */ 1079 #ifdef INET6 1080 struct sockaddr_in6 *sin6; 1081 #endif /* INET6 */ 1082 1083 switch (sa->sa_family) { 1084 1085 case AF_UNSPEC: 1086 bcopy(sa->sa_data, addrlo, ETHER_ADDR_LEN); 1087 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1088 break; 1089 1090 #ifdef INET 1091 case AF_INET: 1092 sin = satosin(sa); 1093 if (sin->sin_addr.s_addr == INADDR_ANY) { 1094 /* 1095 * An IP address of INADDR_ANY means listen to 1096 * or stop listening to all of the Ethernet 1097 * multicast addresses used for IP. 1098 * (This is for the sake of IP multicast routers.) 1099 */ 1100 bcopy(ether_ipmulticast_min, addrlo, ETHER_ADDR_LEN); 1101 bcopy(ether_ipmulticast_max, addrhi, ETHER_ADDR_LEN); 1102 } 1103 else { 1104 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1105 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1106 } 1107 break; 1108 #endif 1109 #ifdef INET6 1110 case AF_INET6: 1111 sin6 = satosin6(sa); 1112 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1113 /* 1114 * An IP6 address of 0 means listen to or stop 1115 * listening to all of the Ethernet multicast 1116 * address used for IP6. 1117 * (This is used for multicast routers.) 1118 */ 1119 bcopy(ether_ip6multicast_min, addrlo, ETHER_ADDR_LEN); 1120 bcopy(ether_ip6multicast_max, addrhi, ETHER_ADDR_LEN); 1121 } else { 1122 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1123 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1124 } 1125 break; 1126 #endif 1127 1128 default: 1129 return (EAFNOSUPPORT); 1130 } 1131 return (0); 1132 } 1133 1134 /* 1135 * Add an Ethernet multicast address or range of addresses to the list for a 1136 * given interface. 1137 */ 1138 int 1139 ether_addmulti(struct ifreq *ifr, struct ethercom *ec) 1140 { 1141 struct ether_multi *enm; 1142 u_char addrlo[ETHER_ADDR_LEN]; 1143 u_char addrhi[ETHER_ADDR_LEN]; 1144 int s = splimp(), error; 1145 1146 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1147 if (error != 0) { 1148 splx(s); 1149 return (error); 1150 } 1151 1152 /* 1153 * Verify that we have valid Ethernet multicast addresses. 1154 */ 1155 if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) { 1156 splx(s); 1157 return (EINVAL); 1158 } 1159 /* 1160 * See if the address range is already in the list. 1161 */ 1162 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1163 if (enm != NULL) { 1164 /* 1165 * Found it; just increment the reference count. 1166 */ 1167 ++enm->enm_refcount; 1168 splx(s); 1169 return (0); 1170 } 1171 /* 1172 * New address or range; malloc a new multicast record 1173 * and link it into the interface's multicast list. 1174 */ 1175 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1176 if (enm == NULL) { 1177 splx(s); 1178 return (ENOBUFS); 1179 } 1180 bcopy(addrlo, enm->enm_addrlo, 6); 1181 bcopy(addrhi, enm->enm_addrhi, 6); 1182 enm->enm_ec = ec; 1183 enm->enm_refcount = 1; 1184 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1185 ec->ec_multicnt++; 1186 splx(s); 1187 /* 1188 * Return ENETRESET to inform the driver that the list has changed 1189 * and its reception filter should be adjusted accordingly. 1190 */ 1191 return (ENETRESET); 1192 } 1193 1194 /* 1195 * Delete a multicast address record. 1196 */ 1197 int 1198 ether_delmulti(struct ifreq *ifr, struct ethercom *ec) 1199 { 1200 struct ether_multi *enm; 1201 u_char addrlo[ETHER_ADDR_LEN]; 1202 u_char addrhi[ETHER_ADDR_LEN]; 1203 int s = splimp(), error; 1204 1205 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1206 if (error != 0) { 1207 splx(s); 1208 return (error); 1209 } 1210 1211 /* 1212 * Look ur the address in our list. 1213 */ 1214 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1215 if (enm == NULL) { 1216 splx(s); 1217 return (ENXIO); 1218 } 1219 if (--enm->enm_refcount != 0) { 1220 /* 1221 * Still some claims to this record. 1222 */ 1223 splx(s); 1224 return (0); 1225 } 1226 /* 1227 * No remaining claims to this record; unlink and free it. 1228 */ 1229 LIST_REMOVE(enm, enm_list); 1230 free(enm, M_IFMADDR); 1231 ec->ec_multicnt--; 1232 splx(s); 1233 /* 1234 * Return ENETRESET to inform the driver that the list has changed 1235 * and its reception filter should be adjusted accordingly. 1236 */ 1237 return (ENETRESET); 1238 } 1239 1240 /* 1241 * Common ioctls for Ethernet interfaces. Note, we must be 1242 * called at splnet(). 1243 */ 1244 int 1245 ether_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1246 { 1247 struct ethercom *ec = (void *) ifp; 1248 struct ifreq *ifr = (struct ifreq *)data; 1249 struct ifaddr *ifa = (struct ifaddr *)data; 1250 int error = 0; 1251 1252 switch (cmd) { 1253 case SIOCSIFADDR: 1254 ifp->if_flags |= IFF_UP; 1255 switch (ifa->ifa_addr->sa_family) { 1256 case AF_LINK: 1257 { 1258 struct sockaddr_dl *sdl = 1259 (struct sockaddr_dl *) ifa->ifa_addr; 1260 1261 if (sdl->sdl_type != IFT_ETHER || 1262 sdl->sdl_alen != ifp->if_addrlen) { 1263 error = EINVAL; 1264 break; 1265 } 1266 1267 memcpy(LLADDR(ifp->if_sadl), LLADDR(sdl), 1268 ifp->if_addrlen); 1269 1270 /* Set new address. */ 1271 error = (*ifp->if_init)(ifp); 1272 break; 1273 } 1274 #ifdef INET 1275 case AF_INET: 1276 if ((error = (*ifp->if_init)(ifp)) != 0) 1277 break; 1278 arp_ifinit(ifp, ifa); 1279 break; 1280 #endif /* INET */ 1281 #ifdef NS 1282 case AF_NS: 1283 { 1284 struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; 1285 1286 if (ns_nullhost(*ina)) 1287 ina->x_host = *(union ns_host *) 1288 LLADDR(ifp->if_sadl); 1289 else 1290 memcpy(LLADDR(ifp->if_sadl), 1291 ina->x_host.c_host, ifp->if_addrlen); 1292 /* Set new address. */ 1293 error = (*ifp->if_init)(ifp); 1294 break; 1295 } 1296 #endif /* NS */ 1297 default: 1298 error = (*ifp->if_init)(ifp); 1299 break; 1300 } 1301 break; 1302 1303 case SIOCGIFADDR: 1304 memcpy(((struct sockaddr *)&ifr->ifr_data)->sa_data, 1305 LLADDR(ifp->if_sadl), ETHER_ADDR_LEN); 1306 break; 1307 1308 case SIOCSIFMTU: 1309 if (ifr->ifr_mtu > ETHERMTU) 1310 error = EINVAL; 1311 else 1312 ifp->if_mtu = ifr->ifr_mtu; 1313 break; 1314 1315 case SIOCSIFFLAGS: 1316 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_RUNNING) { 1317 /* 1318 * If interface is marked down and it is running, 1319 * then stop and disable it. 1320 */ 1321 (*ifp->if_stop)(ifp, 1); 1322 } else if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_UP) { 1323 /* 1324 * If interface is marked up and it is stopped, then 1325 * start it. 1326 */ 1327 error = (*ifp->if_init)(ifp); 1328 } else if ((ifp->if_flags & IFF_UP) != 0) { 1329 /* 1330 * Reset the interface to pick up changes in any other 1331 * flags that affect the hardware state. 1332 */ 1333 error = (*ifp->if_init)(ifp); 1334 } 1335 break; 1336 1337 case SIOCADDMULTI: 1338 error = ether_addmulti(ifr, ec); 1339 break; 1340 1341 case SIOCDELMULTI: 1342 error = ether_delmulti(ifr, ec); 1343 break; 1344 1345 default: 1346 error = ENOTTY; 1347 } 1348 1349 return (error); 1350 } 1351
Indexes created Tue Sep 23 02:09:52 GMT 2025