if_ethersubr.c revision 1.96
1 /* $NetBSD: if_ethersubr.c,v 1.96 2002/08/19 18:58:50 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 <sys/cdefs.h> 68 __KERNEL_RCSID(0, "$NetBSD: if_ethersubr.c,v 1.96 2002/08/19 18:58:50 thorpej Exp $"); 69 70 #include "opt_inet.h" 71 #include "opt_atalk.h" 72 #include "opt_ccitt.h" 73 #include "opt_llc.h" 74 #include "opt_iso.h" 75 #include "opt_ns.h" 76 #include "opt_gateway.h" 77 #include "opt_pfil_hooks.h" 78 #include "vlan.h" 79 #include "pppoe.h" 80 #include "bridge.h" 81 #include "bpfilter.h" 82 #include "arp.h" 83 84 #include <sys/param.h> 85 #include <sys/systm.h> 86 #include <sys/kernel.h> 87 #include <sys/callout.h> 88 #include <sys/malloc.h> 89 #include <sys/mbuf.h> 90 #include <sys/protosw.h> 91 #include <sys/socket.h> 92 #include <sys/ioctl.h> 93 #include <sys/errno.h> 94 #include <sys/syslog.h> 95 96 #include <machine/cpu.h> 97 98 #include <net/if.h> 99 #include <net/netisr.h> 100 #include <net/route.h> 101 #include <net/if_llc.h> 102 #include <net/if_dl.h> 103 #include <net/if_types.h> 104 105 #if NARP == 0 106 /* 107 * XXX there should realy be a way to issue this warning from within config(8) 108 */ 109 #error You have included a pseudo-device in your configuration that depends on the presence of ethernet interfaces, but have no such interfaces configured. Check if you realy need pseudo-device bridge, ppppoe or vlan. 110 #endif 111 112 #if NBPFILTER > 0 113 #include <net/bpf.h> 114 #endif 115 116 #include <net/if_ether.h> 117 #if NVLAN > 0 118 #include <net/if_vlanvar.h> 119 #endif 120 121 #if NPPPOE > 0 122 #include <net/if_pppoe.h> 123 #endif 124 125 #if NBRIDGE > 0 126 #include <net/if_bridgevar.h> 127 #endif 128 129 #include <netinet/in.h> 130 #ifdef INET 131 #include <netinet/in_var.h> 132 #endif 133 #include <netinet/if_inarp.h> 134 135 #ifdef INET6 136 #ifndef INET 137 #include <netinet/in.h> 138 #endif 139 #include <netinet6/in6_var.h> 140 #include <netinet6/nd6.h> 141 #endif 142 143 #ifdef NS 144 #include <netns/ns.h> 145 #include <netns/ns_if.h> 146 #endif 147 148 #ifdef IPX 149 #include <netipx/ipx.h> 150 #include <netipx/ipx_if.h> 151 #endif 152 153 #ifdef ISO 154 #include <netiso/argo_debug.h> 155 #include <netiso/iso.h> 156 #include <netiso/iso_var.h> 157 #include <netiso/iso_snpac.h> 158 #endif 159 160 #ifdef LLC 161 #include <netccitt/dll.h> 162 #include <netccitt/llc_var.h> 163 #endif 164 165 #if defined(LLC) && defined(CCITT) 166 extern struct ifqueue pkintrq; 167 #endif 168 169 #ifdef NETATALK 170 #include <netatalk/at.h> 171 #include <netatalk/at_var.h> 172 #include <netatalk/at_extern.h> 173 174 #define llc_snap_org_code llc_un.type_snap.org_code 175 #define llc_snap_ether_type llc_un.type_snap.ether_type 176 177 extern u_char at_org_code[3]; 178 extern u_char aarp_org_code[3]; 179 #endif /* NETATALK */ 180 181 u_char etherbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 182 #define senderr(e) { error = (e); goto bad;} 183 184 #define SIN(x) ((struct sockaddr_in *)x) 185 186 static int ether_output __P((struct ifnet *, struct mbuf *, 187 struct sockaddr *, struct rtentry *)); 188 static void ether_input __P((struct ifnet *, struct mbuf *)); 189 190 /* 191 * Ethernet output routine. 192 * Encapsulate a packet of type family for the local net. 193 * Assumes that ifp is actually pointer to ethercom structure. 194 */ 195 static int 196 ether_output(struct ifnet *ifp, struct mbuf *m0, struct sockaddr *dst, 197 struct rtentry *rt0) 198 { 199 u_int16_t etype = 0; 200 int s, len, error = 0, hdrcmplt = 0; 201 u_char esrc[6], edst[6]; 202 struct mbuf *m = m0; 203 struct rtentry *rt; 204 struct mbuf *mcopy = (struct mbuf *)0; 205 struct ether_header *eh; 206 ALTQ_DECL(struct altq_pktattr pktattr;) 207 #ifdef INET 208 struct arphdr *ah; 209 #endif /* INET */ 210 #ifdef NETATALK 211 struct at_ifaddr *aa; 212 #endif /* NETATALK */ 213 short mflags; 214 215 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 216 senderr(ENETDOWN); 217 if ((rt = rt0) != NULL) { 218 if ((rt->rt_flags & RTF_UP) == 0) { 219 if ((rt0 = rt = rtalloc1(dst, 1)) != NULL) { 220 rt->rt_refcnt--; 221 if (rt->rt_ifp != ifp) 222 return (*rt->rt_ifp->if_output) 223 (ifp, m0, dst, rt); 224 } else 225 senderr(EHOSTUNREACH); 226 } 227 if ((rt->rt_flags & RTF_GATEWAY) && dst->sa_family != AF_NS) { 228 if (rt->rt_gwroute == 0) 229 goto lookup; 230 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 231 rtfree(rt); rt = rt0; 232 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1); 233 if ((rt = rt->rt_gwroute) == 0) 234 senderr(EHOSTUNREACH); 235 /* the "G" test below also prevents rt == rt0 */ 236 if ((rt->rt_flags & RTF_GATEWAY) || 237 (rt->rt_ifp != ifp)) { 238 rt->rt_refcnt--; 239 rt0->rt_gwroute = 0; 240 senderr(EHOSTUNREACH); 241 } 242 } 243 } 244 if (rt->rt_flags & RTF_REJECT) 245 if (rt->rt_rmx.rmx_expire == 0 || 246 time.tv_sec < rt->rt_rmx.rmx_expire) 247 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 248 } 249 250 switch (dst->sa_family) { 251 252 #ifdef INET 253 case AF_INET: 254 if (m->m_flags & M_BCAST) 255 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 256 sizeof(edst)); 257 258 else if (m->m_flags & M_MCAST) { 259 ETHER_MAP_IP_MULTICAST(&SIN(dst)->sin_addr, 260 (caddr_t)edst) 261 262 } else if (!arpresolve(ifp, rt, m, dst, edst)) 263 return (0); /* if not yet resolved */ 264 /* If broadcasting on a simplex interface, loopback a copy */ 265 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 266 mcopy = m_copy(m, 0, (int)M_COPYALL); 267 etype = htons(ETHERTYPE_IP); 268 break; 269 270 case AF_ARP: 271 ah = mtod(m, struct arphdr *); 272 if (m->m_flags & M_BCAST) 273 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 274 sizeof(edst)); 275 else 276 bcopy((caddr_t)ar_tha(ah), 277 (caddr_t)edst, sizeof(edst)); 278 279 ah->ar_hrd = htons(ARPHRD_ETHER); 280 281 switch(ntohs(ah->ar_op)) { 282 case ARPOP_REVREQUEST: 283 case ARPOP_REVREPLY: 284 etype = htons(ETHERTYPE_REVARP); 285 break; 286 287 case ARPOP_REQUEST: 288 case ARPOP_REPLY: 289 default: 290 etype = htons(ETHERTYPE_ARP); 291 } 292 293 break; 294 #endif 295 #ifdef INET6 296 case AF_INET6: 297 if (!nd6_storelladdr(ifp, rt, m, dst, (u_char *)edst)){ 298 /* something bad happened */ 299 return(0); 300 } 301 etype = htons(ETHERTYPE_IPV6); 302 break; 303 #endif 304 #ifdef NETATALK 305 case AF_APPLETALK: 306 if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) { 307 #ifdef NETATALKDEBUG 308 printf("aarpresolv failed\n"); 309 #endif /* NETATALKDEBUG */ 310 return (0); 311 } 312 /* 313 * ifaddr is the first thing in at_ifaddr 314 */ 315 aa = (struct at_ifaddr *) at_ifawithnet( 316 (struct sockaddr_at *)dst, ifp); 317 if (aa == NULL) 318 goto bad; 319 320 /* 321 * In the phase 2 case, we need to prepend an mbuf for the 322 * llc header. Since we must preserve the value of m, 323 * which is passed to us by value, we m_copy() the first 324 * mbuf, and use it for our llc header. 325 */ 326 if (aa->aa_flags & AFA_PHASE2) { 327 struct llc llc; 328 329 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 330 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 331 llc.llc_control = LLC_UI; 332 bcopy(at_org_code, llc.llc_snap_org_code, 333 sizeof(llc.llc_snap_org_code)); 334 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 335 bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc)); 336 } else { 337 etype = htons(ETHERTYPE_ATALK); 338 } 339 break; 340 #endif /* NETATALK */ 341 #ifdef NS 342 case AF_NS: 343 etype = htons(ETHERTYPE_NS); 344 bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host), 345 (caddr_t)edst, sizeof (edst)); 346 if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst))) 347 return (looutput(ifp, m, dst, rt)); 348 /* If broadcasting on a simplex interface, loopback a copy */ 349 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 350 mcopy = m_copy(m, 0, (int)M_COPYALL); 351 break; 352 #endif 353 #ifdef IPX 354 case AF_IPX: 355 etype = htons(ETHERTYPE_IPX); 356 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 357 (caddr_t)edst, sizeof (edst)); 358 /* If broadcasting on a simplex interface, loopback a copy */ 359 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 360 mcopy = m_copy(m, 0, (int)M_COPYALL); 361 break; 362 #endif 363 #ifdef ISO 364 case AF_ISO: { 365 int snpalen; 366 struct llc *l; 367 struct sockaddr_dl *sdl; 368 369 if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) && 370 sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) { 371 bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst)); 372 } else { 373 error = iso_snparesolve(ifp, (struct sockaddr_iso *)dst, 374 (char *)edst, &snpalen); 375 if (error) 376 goto bad; /* Not Resolved */ 377 } 378 /* If broadcasting on a simplex interface, loopback a copy */ 379 if (*edst & 1) 380 m->m_flags |= (M_BCAST|M_MCAST); 381 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) && 382 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 383 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 384 if (mcopy) { 385 eh = mtod(mcopy, struct ether_header *); 386 bcopy((caddr_t)edst, 387 (caddr_t)eh->ether_dhost, sizeof (edst)); 388 bcopy(LLADDR(ifp->if_sadl), 389 (caddr_t)eh->ether_shost, sizeof (edst)); 390 } 391 } 392 M_PREPEND(m, 3, M_DONTWAIT); 393 if (m == NULL) 394 return (0); 395 l = mtod(m, struct llc *); 396 l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP; 397 l->llc_control = LLC_UI; 398 #ifdef ARGO_DEBUG 399 if (argo_debug[D_ETHER]) { 400 int i; 401 printf("unoutput: sending pkt to: "); 402 for (i=0; i<6; i++) 403 printf("%x ", edst[i] & 0xff); 404 printf("\n"); 405 } 406 #endif 407 } break; 408 #endif /* ISO */ 409 #ifdef LLC 410 /* case AF_NSAP: */ 411 case AF_CCITT: { 412 struct sockaddr_dl *sdl = 413 (struct sockaddr_dl *) rt -> rt_gateway; 414 415 if (sdl && sdl->sdl_family == AF_LINK 416 && sdl->sdl_alen > 0) { 417 bcopy(LLADDR(sdl), (char *)edst, 418 sizeof(edst)); 419 } else goto bad; /* Not a link interface ? Funny ... */ 420 if ((ifp->if_flags & IFF_SIMPLEX) && (*edst & 1) && 421 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 422 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 423 if (mcopy) { 424 eh = mtod(mcopy, struct ether_header *); 425 bcopy((caddr_t)edst, 426 (caddr_t)eh->ether_dhost, sizeof (edst)); 427 bcopy(LLADDR(ifp->if_sadl), 428 (caddr_t)eh->ether_shost, sizeof (edst)); 429 } 430 } 431 #ifdef LLC_DEBUG 432 { 433 int i; 434 struct llc *l = mtod(m, struct llc *); 435 436 printf("ether_output: sending LLC2 pkt to: "); 437 for (i=0; i<6; i++) 438 printf("%x ", edst[i] & 0xff); 439 printf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n", 440 m->m_pkthdr.len, l->llc_dsap & 0xff, l->llc_ssap &0xff, 441 l->llc_control & 0xff); 442 443 } 444 #endif /* LLC_DEBUG */ 445 } break; 446 #endif /* LLC */ 447 448 case pseudo_AF_HDRCMPLT: 449 hdrcmplt = 1; 450 eh = (struct ether_header *)dst->sa_data; 451 bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, sizeof (esrc)); 452 /* FALLTHROUGH */ 453 454 case AF_UNSPEC: 455 eh = (struct ether_header *)dst->sa_data; 456 bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, sizeof (edst)); 457 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 458 etype = eh->ether_type; 459 break; 460 461 default: 462 printf("%s: can't handle af%d\n", ifp->if_xname, 463 dst->sa_family); 464 senderr(EAFNOSUPPORT); 465 } 466 467 if (mcopy) 468 (void) looutput(ifp, mcopy, dst, rt); 469 470 /* If no ether type is set, this must be a 802.2 formatted packet. 471 */ 472 if (etype == 0) 473 etype = htons(m->m_pkthdr.len); 474 /* 475 * Add local net header. If no space in first mbuf, 476 * allocate another. 477 */ 478 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 479 if (m == 0) 480 senderr(ENOBUFS); 481 eh = mtod(m, struct ether_header *); 482 /* Note: etype is already in network byte order. */ 483 #ifdef __NO_STRICT_ALIGNMENT 484 eh->ether_type = type; 485 #else 486 { 487 uint8_t *dstp = (uint8_t *) &eh->ether_type; 488 #if BYTE_ORDER == BIG_ENDIAN 489 dstp[0] = etype >> 8; 490 dstp[1] = etype; 491 #else 492 dstp[0] = etype; 493 dstp[1] = etype >> 8; 494 #endif /* BYTE_ORDER == BIG_ENDIAN */ 495 } 496 #endif /* __NO_STRICT_ALIGNMENT */ 497 bcopy((caddr_t)edst, (caddr_t)eh->ether_dhost, sizeof (edst)); 498 if (hdrcmplt) 499 bcopy((caddr_t)esrc, (caddr_t)eh->ether_shost, 500 sizeof(eh->ether_shost)); 501 else 502 bcopy(LLADDR(ifp->if_sadl), (caddr_t)eh->ether_shost, 503 sizeof(eh->ether_shost)); 504 505 #ifdef PFIL_HOOKS 506 if ((error = pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 507 return (error); 508 if (m == NULL) 509 return (0); 510 #endif 511 512 #if NBRIDGE > 0 513 /* 514 * Bridges require special output handling. 515 */ 516 if (ifp->if_bridge) 517 return (bridge_output(ifp, m, NULL, NULL)); 518 #endif 519 520 #ifdef ALTQ 521 /* 522 * If ALTQ is enabled on the parent interface, do 523 * classification; the queueing discipline might not 524 * require classification, but might require the 525 * address family/header pointer in the pktattr. 526 */ 527 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 528 altq_etherclassify(&ifp->if_snd, m, &pktattr); 529 #endif 530 531 mflags = m->m_flags; 532 len = m->m_pkthdr.len; 533 s = splnet(); 534 /* 535 * Queue message on interface, and start output if interface 536 * not yet active. 537 */ 538 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, error); 539 if (error) { 540 /* mbuf is already freed */ 541 splx(s); 542 return (error); 543 } 544 ifp->if_obytes += len; 545 if (mflags & M_MCAST) 546 ifp->if_omcasts++; 547 if ((ifp->if_flags & IFF_OACTIVE) == 0) 548 (*ifp->if_start)(ifp); 549 splx(s); 550 return (error); 551 552 bad: 553 if (m) 554 m_freem(m); 555 return (error); 556 } 557 558 #ifdef ALTQ 559 /* 560 * This routine is a slight hack to allow a packet to be classified 561 * if the Ethernet headers are present. It will go away when ALTQ's 562 * classification engine understands link headers. 563 */ 564 void 565 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m, 566 struct altq_pktattr *pktattr) 567 { 568 struct ether_header *eh; 569 u_int16_t ether_type; 570 int hlen, af, hdrsize; 571 caddr_t hdr; 572 573 hlen = ETHER_HDR_LEN; 574 eh = mtod(m, struct ether_header *); 575 576 ether_type = htons(eh->ether_type); 577 578 if (ether_type < ETHERMTU) { 579 /* LLC/SNAP */ 580 struct llc *llc = (struct llc *)(eh + 1); 581 hlen += 8; 582 583 if (m->m_len < hlen || 584 llc->llc_dsap != LLC_SNAP_LSAP || 585 llc->llc_ssap != LLC_SNAP_LSAP || 586 llc->llc_control != LLC_UI) { 587 /* Not SNAP. */ 588 goto bad; 589 } 590 591 ether_type = htons(llc->llc_un.type_snap.ether_type); 592 } 593 594 switch (ether_type) { 595 case ETHERTYPE_IP: 596 af = AF_INET; 597 hdrsize = 20; /* sizeof(struct ip) */ 598 break; 599 600 case ETHERTYPE_IPV6: 601 af = AF_INET6; 602 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 603 break; 604 605 default: 606 af = AF_UNSPEC; 607 hdrsize = 0; 608 break; 609 } 610 611 while (m->m_len <= hlen) { 612 hlen -= m->m_len; 613 m = m->m_next; 614 } 615 if (m->m_len < (hlen + hdrsize)) { 616 /* 617 * protocol header not in a single mbuf. 618 * We can't cope with this situation right 619 * now (but it shouldn't ever happen, really, anyhow). 620 */ 621 #ifdef DEBUG 622 printf("altq_etherclassify: headers span multiple mbufs: " 623 "%d < %d\n", m->m_len, (hlen + hdrsize)); 624 #endif 625 goto bad; 626 } 627 628 m->m_data += hlen; 629 m->m_len -= hlen; 630 631 hdr = mtod(m, caddr_t); 632 633 if (ALTQ_NEEDS_CLASSIFY(ifq)) 634 pktattr->pattr_class = 635 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 636 pktattr->pattr_af = af; 637 pktattr->pattr_hdr = hdr; 638 639 m->m_data -= hlen; 640 m->m_len += hlen; 641 642 return; 643 644 bad: 645 pktattr->pattr_class = NULL; 646 pktattr->pattr_hdr = NULL; 647 pktattr->pattr_af = AF_UNSPEC; 648 } 649 #endif /* ALTQ */ 650 651 /* 652 * Process a received Ethernet packet; 653 * the packet is in the mbuf chain m with 654 * the ether header. 655 */ 656 static void 657 ether_input(struct ifnet *ifp, struct mbuf *m) 658 { 659 struct ethercom *ec = (struct ethercom *) ifp; 660 struct ifqueue *inq; 661 u_int16_t etype; 662 int s; 663 struct ether_header *eh; 664 struct mbuf *n; 665 #if defined (ISO) || defined (LLC) || defined(NETATALK) 666 struct llc *l; 667 #endif 668 669 if ((ifp->if_flags & IFF_UP) == 0) { 670 m_freem(m); 671 return; 672 } 673 674 eh = mtod(m, struct ether_header *); 675 etype = ntohs(eh->ether_type); 676 677 /* 678 * Determine if the packet is within its size limits. 679 */ 680 if (m->m_pkthdr.len > 681 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 682 printf("%s: discarding oversize frame (len=%d)\n", 683 ifp->if_xname, m->m_pkthdr.len); 684 m_freem(m); 685 return; 686 } 687 688 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 689 /* 690 * If this is not a simplex interface, drop the packet 691 * if it came from us. 692 */ 693 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 694 memcmp(LLADDR(ifp->if_sadl), eh->ether_shost, 695 ETHER_ADDR_LEN) == 0) { 696 m_freem(m); 697 return; 698 } 699 700 if (memcmp(etherbroadcastaddr, 701 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 702 m->m_flags |= M_BCAST; 703 else 704 m->m_flags |= M_MCAST; 705 ifp->if_imcasts++; 706 } 707 708 /* If the CRC is still on the packet, trim it off. */ 709 if (m->m_flags & M_HASFCS) { 710 m_adj(m, -ETHER_CRC_LEN); 711 m->m_flags &= ~M_HASFCS; 712 } 713 714 ifp->if_ibytes += m->m_pkthdr.len; 715 716 #if NBRIDGE > 0 717 /* 718 * Tap the packet off here for a bridge. bridge_input() 719 * will return NULL if it has consumed the packet, otherwise 720 * it gets processed as normal. Note that bridge_input() 721 * will always return the original packet if we need to 722 * process it locally. 723 */ 724 if (ifp->if_bridge) { 725 m = bridge_input(ifp, m); 726 if (m == NULL) 727 return; 728 729 /* 730 * Bridge has determined that the packet is for us. 731 * Update our interface pointer -- we may have had 732 * to "bridge" the packet locally. 733 */ 734 ifp = m->m_pkthdr.rcvif; 735 } 736 #endif /* NBRIDGE > 0 */ 737 738 /* 739 * XXX This comparison is redundant if we are a bridge 740 * XXX and processing the packet locally. 741 */ 742 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0 && 743 (ifp->if_flags & IFF_PROMISC) != 0 && 744 memcmp(LLADDR(ifp->if_sadl), eh->ether_dhost, 745 ETHER_ADDR_LEN) != 0) { 746 m_freem(m); 747 return; 748 } 749 750 #ifdef PFIL_HOOKS 751 if (pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 752 return; 753 if (m == NULL) 754 return; 755 756 eh = mtod(m, struct ether_header *); 757 etype = ntohs(eh->ether_type); 758 #endif 759 760 /* 761 * If VLANs are configured on the interface, check to 762 * see if the device performed the decapsulation and 763 * provided us with the tag. 764 */ 765 if (ec->ec_nvlans && 766 (n = m_aux_find(m, AF_LINK, ETHERTYPE_VLAN)) != NULL) { 767 #if NVLAN > 0 768 /* 769 * vlan_input() will either recursively call ether_input() 770 * or drop the packet. 771 */ 772 vlan_input(ifp, m); 773 #else 774 m_freem(m); 775 #endif 776 return; 777 } 778 779 /* 780 * Handle protocols that expect to have the Ethernet header 781 * (and possibly FCS) intact. 782 */ 783 switch (etype) { 784 #if NVLAN > 0 785 case ETHERTYPE_VLAN: 786 /* 787 * vlan_input() will either recursively call ether_input() 788 * or drop the packet. 789 */ 790 if (((struct ethercom *)ifp)->ec_nvlans != 0) 791 vlan_input(ifp, m); 792 else 793 m_freem(m); 794 return; 795 #endif /* NVLAN > 0 */ 796 #if NPPPOE > 0 797 case ETHERTYPE_PPPOEDISC: 798 case ETHERTYPE_PPPOE: 799 if (etype == ETHERTYPE_PPPOEDISC) 800 inq = &ppoediscinq; 801 else 802 inq = &ppoeinq; 803 s = splnet(); 804 if (IF_QFULL(inq)) { 805 IF_DROP(inq); 806 m_freem(m); 807 } else 808 IF_ENQUEUE(inq, m); 809 splx(s); 810 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 811 if (!callout_active(&pppoe_softintr)) 812 callout_reset(&pppoe_softintr, 1, pppoe_softintr_handler, NULL); 813 #else 814 softintr_schedule(pppoe_softintr); 815 #endif 816 return; 817 #endif /* NPPPOE > 0 */ 818 default: 819 ; /* Nothing. */ 820 } 821 822 /* Strip off the Ethernet header. */ 823 m_adj(m, sizeof(struct ether_header)); 824 825 /* If the CRC is still on the packet, trim it off. */ 826 if (m->m_flags & M_HASFCS) { 827 m_adj(m, -ETHER_CRC_LEN); 828 m->m_flags &= ~M_HASFCS; 829 } 830 831 switch (etype) { 832 #ifdef INET 833 case ETHERTYPE_IP: 834 #ifdef GATEWAY 835 if (ipflow_fastforward(m)) 836 return; 837 #endif 838 schednetisr(NETISR_IP); 839 inq = &ipintrq; 840 break; 841 842 case ETHERTYPE_ARP: 843 schednetisr(NETISR_ARP); 844 inq = &arpintrq; 845 break; 846 847 case ETHERTYPE_REVARP: 848 revarpinput(m); /* XXX queue? */ 849 return; 850 #endif 851 #ifdef INET6 852 case ETHERTYPE_IPV6: 853 schednetisr(NETISR_IPV6); 854 inq = &ip6intrq; 855 break; 856 #endif 857 #ifdef NS 858 case ETHERTYPE_NS: 859 schednetisr(NETISR_NS); 860 inq = &nsintrq; 861 break; 862 863 #endif 864 #ifdef IPX 865 case ETHERTYPE_IPX: 866 schednetisr(NETISR_IPX); 867 inq = &ipxintrq; 868 break; 869 #endif 870 #ifdef NETATALK 871 case ETHERTYPE_ATALK: 872 schednetisr(NETISR_ATALK); 873 inq = &atintrq1; 874 break; 875 case ETHERTYPE_AARP: 876 /* probably this should be done with a NETISR as well */ 877 aarpinput(ifp, m); /* XXX */ 878 return; 879 #endif /* NETATALK */ 880 default: 881 #if defined (ISO) || defined (LLC) || defined (NETATALK) 882 if (etype > ETHERMTU) 883 goto dropanyway; 884 l = mtod(m, struct llc *); 885 switch (l->llc_dsap) { 886 #ifdef NETATALK 887 case LLC_SNAP_LSAP: 888 switch (l->llc_control) { 889 case LLC_UI: 890 if (l->llc_ssap != LLC_SNAP_LSAP) { 891 goto dropanyway; 892 } 893 894 if (Bcmp(&(l->llc_snap_org_code)[0], 895 at_org_code, sizeof(at_org_code)) == 0 && 896 ntohs(l->llc_snap_ether_type) == 897 ETHERTYPE_ATALK) { 898 inq = &atintrq2; 899 m_adj(m, sizeof(struct llc)); 900 schednetisr(NETISR_ATALK); 901 break; 902 } 903 904 if (Bcmp(&(l->llc_snap_org_code)[0], 905 aarp_org_code, 906 sizeof(aarp_org_code)) == 0 && 907 ntohs(l->llc_snap_ether_type) == 908 ETHERTYPE_AARP) { 909 m_adj( m, sizeof(struct llc)); 910 aarpinput(ifp, m); /* XXX */ 911 return; 912 } 913 914 default: 915 goto dropanyway; 916 } 917 break; 918 #endif /* NETATALK */ 919 #ifdef ISO 920 case LLC_ISO_LSAP: 921 switch (l->llc_control) { 922 case LLC_UI: 923 /* LLC_UI_P forbidden in class 1 service */ 924 if ((l->llc_dsap == LLC_ISO_LSAP) && 925 (l->llc_ssap == LLC_ISO_LSAP)) { 926 /* LSAP for ISO */ 927 if (m->m_pkthdr.len > etype) 928 m_adj(m, etype - m->m_pkthdr.len); 929 m->m_data += 3; /* XXX */ 930 m->m_len -= 3; /* XXX */ 931 m->m_pkthdr.len -= 3; /* XXX */ 932 M_PREPEND(m, sizeof *eh, M_DONTWAIT); 933 if (m == 0) 934 return; 935 *mtod(m, struct ether_header *) = *eh; 936 #ifdef ARGO_DEBUG 937 if (argo_debug[D_ETHER]) 938 printf("clnp packet"); 939 #endif 940 schednetisr(NETISR_ISO); 941 inq = &clnlintrq; 942 break; 943 } 944 goto dropanyway; 945 946 case LLC_XID: 947 case LLC_XID_P: 948 if(m->m_len < 6) 949 goto dropanyway; 950 l->llc_window = 0; 951 l->llc_fid = 9; 952 l->llc_class = 1; 953 l->llc_dsap = l->llc_ssap = 0; 954 /* Fall through to */ 955 case LLC_TEST: 956 case LLC_TEST_P: 957 { 958 struct sockaddr sa; 959 struct ether_header *eh2; 960 int i; 961 u_char c = l->llc_dsap; 962 963 l->llc_dsap = l->llc_ssap; 964 l->llc_ssap = c; 965 if (m->m_flags & (M_BCAST | M_MCAST)) 966 bcopy(LLADDR(ifp->if_sadl), 967 (caddr_t)eh->ether_dhost, 6); 968 sa.sa_family = AF_UNSPEC; 969 sa.sa_len = sizeof(sa); 970 eh2 = (struct ether_header *)sa.sa_data; 971 for (i = 0; i < 6; i++) { 972 eh2->ether_shost[i] = c = 973 eh->ether_dhost[i]; 974 eh2->ether_dhost[i] = 975 eh->ether_dhost[i] = 976 eh->ether_shost[i]; 977 eh->ether_shost[i] = c; 978 } 979 ifp->if_output(ifp, m, &sa, NULL); 980 return; 981 } 982 default: 983 m_freem(m); 984 return; 985 } 986 break; 987 #endif /* ISO */ 988 #ifdef LLC 989 case LLC_X25_LSAP: 990 { 991 if (m->m_pkthdr.len > etype) 992 m_adj(m, etype - m->m_pkthdr.len); 993 M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT); 994 if (m == 0) 995 return; 996 if ( !sdl_sethdrif(ifp, eh->ether_shost, LLC_X25_LSAP, 997 eh->ether_dhost, LLC_X25_LSAP, 6, 998 mtod(m, struct sdl_hdr *))) 999 panic("ETHER cons addr failure"); 1000 mtod(m, struct sdl_hdr *)->sdlhdr_len = etype; 1001 #ifdef LLC_DEBUG 1002 printf("llc packet\n"); 1003 #endif /* LLC_DEBUG */ 1004 schednetisr(NETISR_CCITT); 1005 inq = &llcintrq; 1006 break; 1007 } 1008 #endif /* LLC */ 1009 dropanyway: 1010 default: 1011 m_freem(m); 1012 return; 1013 } 1014 #else /* ISO || LLC || NETATALK*/ 1015 m_freem(m); 1016 return; 1017 #endif /* ISO || LLC || NETATALK*/ 1018 } 1019 1020 s = splnet(); 1021 if (IF_QFULL(inq)) { 1022 IF_DROP(inq); 1023 m_freem(m); 1024 } else 1025 IF_ENQUEUE(inq, m); 1026 splx(s); 1027 } 1028 1029 /* 1030 * Convert Ethernet address to printable (loggable) representation. 1031 */ 1032 static char digits[] = "0123456789abcdef"; 1033 char * 1034 ether_sprintf(const u_char *ap) 1035 { 1036 static char etherbuf[18]; 1037 char *cp = etherbuf; 1038 int i; 1039 1040 for (i = 0; i < 6; i++) { 1041 *cp++ = digits[*ap >> 4]; 1042 *cp++ = digits[*ap++ & 0xf]; 1043 *cp++ = ':'; 1044 } 1045 *--cp = 0; 1046 return (etherbuf); 1047 } 1048 1049 /* 1050 * Perform common duties while attaching to interface list 1051 */ 1052 void 1053 ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 1054 { 1055 1056 ifp->if_type = IFT_ETHER; 1057 ifp->if_addrlen = ETHER_ADDR_LEN; 1058 ifp->if_hdrlen = ETHER_HDR_LEN; 1059 ifp->if_dlt = DLT_EN10MB; 1060 ifp->if_mtu = ETHERMTU; 1061 ifp->if_output = ether_output; 1062 ifp->if_input = ether_input; 1063 if (ifp->if_baudrate == 0) 1064 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 1065 1066 if_alloc_sadl(ifp); 1067 memcpy(LLADDR(ifp->if_sadl), lla, ifp->if_addrlen); 1068 1069 LIST_INIT(&((struct ethercom *)ifp)->ec_multiaddrs); 1070 ifp->if_broadcastaddr = etherbroadcastaddr; 1071 #if NBPFILTER > 0 1072 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 1073 #endif 1074 } 1075 1076 void 1077 ether_ifdetach(struct ifnet *ifp) 1078 { 1079 struct ethercom *ec = (void *) ifp; 1080 struct ether_multi *enm; 1081 int s; 1082 1083 #if NBPFILTER > 0 1084 bpfdetach(ifp); 1085 #endif 1086 1087 #if NVLAN > 0 1088 if (ec->ec_nvlans) 1089 vlan_ifdetach(ifp); 1090 #endif 1091 1092 s = splnet(); 1093 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1094 LIST_REMOVE(enm, enm_list); 1095 free(enm, M_IFADDR); 1096 ec->ec_multicnt--; 1097 } 1098 splx(s); 1099 1100 if_free_sadl(ifp); 1101 } 1102 1103 #if 0 1104 /* 1105 * This is for reference. We have a table-driven version 1106 * of the little-endian crc32 generator, which is faster 1107 * than the double-loop. 1108 */ 1109 u_int32_t 1110 ether_crc32_le(const u_int8_t *buf, size_t len) 1111 { 1112 u_int32_t c, crc, carry; 1113 size_t i, j; 1114 1115 crc = 0xffffffffU; /* initial value */ 1116 1117 for (i = 0; i < len; i++) { 1118 c = buf[i]; 1119 for (j = 0; j < 8; j++) { 1120 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1121 crc >>= 1; 1122 c >>= 1; 1123 if (carry) 1124 crc = (crc ^ ETHER_CRC_POLY_LE); 1125 } 1126 } 1127 1128 return (crc); 1129 } 1130 #else 1131 u_int32_t 1132 ether_crc32_le(const u_int8_t *buf, size_t len) 1133 { 1134 static const u_int32_t crctab[] = { 1135 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1136 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1137 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1138 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1139 }; 1140 u_int32_t crc; 1141 int i; 1142 1143 crc = 0xffffffffU; /* initial value */ 1144 1145 for (i = 0; i < len; i++) { 1146 crc ^= buf[i]; 1147 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1148 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1149 } 1150 1151 return (crc); 1152 } 1153 #endif 1154 1155 u_int32_t 1156 ether_crc32_be(const u_int8_t *buf, size_t len) 1157 { 1158 u_int32_t c, crc, carry; 1159 size_t i, j; 1160 1161 crc = 0xffffffffU; /* initial value */ 1162 1163 for (i = 0; i < len; i++) { 1164 c = buf[i]; 1165 for (j = 0; j < 8; j++) { 1166 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1167 crc <<= 1; 1168 c >>= 1; 1169 if (carry) 1170 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1171 } 1172 } 1173 1174 return (crc); 1175 } 1176 1177 #ifdef INET 1178 u_char ether_ipmulticast_min[6] = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1179 u_char ether_ipmulticast_max[6] = { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1180 #endif 1181 #ifdef INET6 1182 u_char ether_ip6multicast_min[6] = { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1183 u_char ether_ip6multicast_max[6] = { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1184 #endif 1185 1186 /* 1187 * Convert a sockaddr into an Ethernet address or range of Ethernet 1188 * addresses. 1189 */ 1190 int 1191 ether_multiaddr(struct sockaddr *sa, u_int8_t addrlo[ETHER_ADDR_LEN], 1192 u_int8_t addrhi[ETHER_ADDR_LEN]) 1193 { 1194 #ifdef INET 1195 struct sockaddr_in *sin; 1196 #endif /* INET */ 1197 #ifdef INET6 1198 struct sockaddr_in6 *sin6; 1199 #endif /* INET6 */ 1200 1201 switch (sa->sa_family) { 1202 1203 case AF_UNSPEC: 1204 bcopy(sa->sa_data, addrlo, ETHER_ADDR_LEN); 1205 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1206 break; 1207 1208 #ifdef INET 1209 case AF_INET: 1210 sin = satosin(sa); 1211 if (sin->sin_addr.s_addr == INADDR_ANY) { 1212 /* 1213 * An IP address of INADDR_ANY means listen to 1214 * or stop listening to all of the Ethernet 1215 * multicast addresses used for IP. 1216 * (This is for the sake of IP multicast routers.) 1217 */ 1218 bcopy(ether_ipmulticast_min, addrlo, ETHER_ADDR_LEN); 1219 bcopy(ether_ipmulticast_max, addrhi, ETHER_ADDR_LEN); 1220 } 1221 else { 1222 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1223 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1224 } 1225 break; 1226 #endif 1227 #ifdef INET6 1228 case AF_INET6: 1229 sin6 = satosin6(sa); 1230 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1231 /* 1232 * An IP6 address of 0 means listen to or stop 1233 * listening to all of the Ethernet multicast 1234 * address used for IP6. 1235 * (This is used for multicast routers.) 1236 */ 1237 bcopy(ether_ip6multicast_min, addrlo, ETHER_ADDR_LEN); 1238 bcopy(ether_ip6multicast_max, addrhi, ETHER_ADDR_LEN); 1239 } else { 1240 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1241 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1242 } 1243 break; 1244 #endif 1245 1246 default: 1247 return (EAFNOSUPPORT); 1248 } 1249 return (0); 1250 } 1251 1252 /* 1253 * Add an Ethernet multicast address or range of addresses to the list for a 1254 * given interface. 1255 */ 1256 int 1257 ether_addmulti(struct ifreq *ifr, struct ethercom *ec) 1258 { 1259 struct ether_multi *enm; 1260 u_char addrlo[ETHER_ADDR_LEN]; 1261 u_char addrhi[ETHER_ADDR_LEN]; 1262 int s = splnet(), error; 1263 1264 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1265 if (error != 0) { 1266 splx(s); 1267 return (error); 1268 } 1269 1270 /* 1271 * Verify that we have valid Ethernet multicast addresses. 1272 */ 1273 if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) { 1274 splx(s); 1275 return (EINVAL); 1276 } 1277 /* 1278 * See if the address range is already in the list. 1279 */ 1280 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1281 if (enm != NULL) { 1282 /* 1283 * Found it; just increment the reference count. 1284 */ 1285 ++enm->enm_refcount; 1286 splx(s); 1287 return (0); 1288 } 1289 /* 1290 * New address or range; malloc a new multicast record 1291 * and link it into the interface's multicast list. 1292 */ 1293 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1294 if (enm == NULL) { 1295 splx(s); 1296 return (ENOBUFS); 1297 } 1298 bcopy(addrlo, enm->enm_addrlo, 6); 1299 bcopy(addrhi, enm->enm_addrhi, 6); 1300 enm->enm_ec = ec; 1301 enm->enm_refcount = 1; 1302 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1303 ec->ec_multicnt++; 1304 splx(s); 1305 /* 1306 * Return ENETRESET to inform the driver that the list has changed 1307 * and its reception filter should be adjusted accordingly. 1308 */ 1309 return (ENETRESET); 1310 } 1311 1312 /* 1313 * Delete a multicast address record. 1314 */ 1315 int 1316 ether_delmulti(struct ifreq *ifr, struct ethercom *ec) 1317 { 1318 struct ether_multi *enm; 1319 u_char addrlo[ETHER_ADDR_LEN]; 1320 u_char addrhi[ETHER_ADDR_LEN]; 1321 int s = splnet(), error; 1322 1323 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1324 if (error != 0) { 1325 splx(s); 1326 return (error); 1327 } 1328 1329 /* 1330 * Look ur the address in our list. 1331 */ 1332 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1333 if (enm == NULL) { 1334 splx(s); 1335 return (ENXIO); 1336 } 1337 if (--enm->enm_refcount != 0) { 1338 /* 1339 * Still some claims to this record. 1340 */ 1341 splx(s); 1342 return (0); 1343 } 1344 /* 1345 * No remaining claims to this record; unlink and free it. 1346 */ 1347 LIST_REMOVE(enm, enm_list); 1348 free(enm, M_IFMADDR); 1349 ec->ec_multicnt--; 1350 splx(s); 1351 /* 1352 * Return ENETRESET to inform the driver that the list has changed 1353 * and its reception filter should be adjusted accordingly. 1354 */ 1355 return (ENETRESET); 1356 } 1357 1358 /* 1359 * Common ioctls for Ethernet interfaces. Note, we must be 1360 * called at splnet(). 1361 */ 1362 int 1363 ether_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1364 { 1365 struct ethercom *ec = (void *) ifp; 1366 struct ifreq *ifr = (struct ifreq *)data; 1367 struct ifaddr *ifa = (struct ifaddr *)data; 1368 int error = 0; 1369 1370 switch (cmd) { 1371 case SIOCSIFADDR: 1372 ifp->if_flags |= IFF_UP; 1373 switch (ifa->ifa_addr->sa_family) { 1374 case AF_LINK: 1375 { 1376 struct sockaddr_dl *sdl = 1377 (struct sockaddr_dl *) ifa->ifa_addr; 1378 1379 if (sdl->sdl_type != IFT_ETHER || 1380 sdl->sdl_alen != ifp->if_addrlen) { 1381 error = EINVAL; 1382 break; 1383 } 1384 1385 memcpy(LLADDR(ifp->if_sadl), LLADDR(sdl), 1386 ifp->if_addrlen); 1387 1388 /* Set new address. */ 1389 error = (*ifp->if_init)(ifp); 1390 break; 1391 } 1392 #ifdef INET 1393 case AF_INET: 1394 if ((ifp->if_flags & IFF_RUNNING) == 0 && 1395 (error = (*ifp->if_init)(ifp)) != 0) 1396 break; 1397 arp_ifinit(ifp, ifa); 1398 break; 1399 #endif /* INET */ 1400 #ifdef NS 1401 case AF_NS: 1402 { 1403 struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; 1404 1405 if (ns_nullhost(*ina)) 1406 ina->x_host = *(union ns_host *) 1407 LLADDR(ifp->if_sadl); 1408 else 1409 memcpy(LLADDR(ifp->if_sadl), 1410 ina->x_host.c_host, ifp->if_addrlen); 1411 /* Set new address. */ 1412 error = (*ifp->if_init)(ifp); 1413 break; 1414 } 1415 #endif /* NS */ 1416 default: 1417 if ((ifp->if_flags & IFF_RUNNING) == 0) 1418 error = (*ifp->if_init)(ifp); 1419 break; 1420 } 1421 break; 1422 1423 case SIOCGIFADDR: 1424 memcpy(((struct sockaddr *)&ifr->ifr_data)->sa_data, 1425 LLADDR(ifp->if_sadl), ETHER_ADDR_LEN); 1426 break; 1427 1428 case SIOCSIFMTU: 1429 { 1430 int maxmtu; 1431 1432 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1433 maxmtu = ETHERMTU_JUMBO; 1434 else 1435 maxmtu = ETHERMTU; 1436 1437 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1438 error = EINVAL; 1439 else { 1440 ifp->if_mtu = ifr->ifr_mtu; 1441 1442 /* Make sure the device notices the MTU change. */ 1443 if (ifp->if_flags & IFF_UP) 1444 error = (*ifp->if_init)(ifp); 1445 } 1446 break; 1447 } 1448 1449 case SIOCSIFFLAGS: 1450 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_RUNNING) { 1451 /* 1452 * If interface is marked down and it is running, 1453 * then stop and disable it. 1454 */ 1455 (*ifp->if_stop)(ifp, 1); 1456 } else if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_UP) { 1457 /* 1458 * If interface is marked up and it is stopped, then 1459 * start it. 1460 */ 1461 error = (*ifp->if_init)(ifp); 1462 } else if ((ifp->if_flags & IFF_UP) != 0) { 1463 /* 1464 * Reset the interface to pick up changes in any other 1465 * flags that affect the hardware state. 1466 */ 1467 error = (*ifp->if_init)(ifp); 1468 } 1469 break; 1470 1471 case SIOCADDMULTI: 1472 error = ether_addmulti(ifr, ec); 1473 break; 1474 1475 case SIOCDELMULTI: 1476 error = ether_delmulti(ifr, ec); 1477 break; 1478 1479 default: 1480 error = ENOTTY; 1481 } 1482 1483 return (error); 1484 } 1485
Indexes created Sun Sep 21 20:09:37 GMT 2025