1 /* $NetBSD: if_ethersubr.c,v 1.120 2005/02/26 22:45:09 perry 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. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)if_ethersubr.c 8.2 (Berkeley) 4/4/96 61 */ 62 63 #include <sys/cdefs.h> 64 __KERNEL_RCSID(0, "$NetBSD: if_ethersubr.c,v 1.120 2005/02/26 22:45:09 perry Exp $"); 65 66 #include "opt_inet.h" 67 #include "opt_atalk.h" 68 #include "opt_ccitt.h" 69 #include "opt_llc.h" 70 #include "opt_iso.h" 71 #include "opt_ipx.h" 72 #include "opt_mbuftrace.h" 73 #include "opt_ns.h" 74 #include "opt_gateway.h" 75 #include "opt_pfil_hooks.h" 76 #include "vlan.h" 77 #include "pppoe.h" 78 #include "bridge.h" 79 #include "bpfilter.h" 80 #include "arp.h" 81 82 #include <sys/param.h> 83 #include <sys/systm.h> 84 #include <sys/kernel.h> 85 #include <sys/callout.h> 86 #include <sys/malloc.h> 87 #include <sys/mbuf.h> 88 #include <sys/protosw.h> 89 #include <sys/socket.h> 90 #include <sys/ioctl.h> 91 #include <sys/errno.h> 92 #include <sys/syslog.h> 93 94 #include <machine/cpu.h> 95 96 #include <net/if.h> 97 #include <net/netisr.h> 98 #include <net/route.h> 99 #include <net/if_llc.h> 100 #include <net/if_dl.h> 101 #include <net/if_types.h> 102 103 #if NARP == 0 104 /* 105 * XXX there should really be a way to issue this warning from within config(8) 106 */ 107 #error You have included NETATALK or a pseudo-device in your configuration that depends on the presence of ethernet interfaces, but have no such interfaces configured. Check if you really need pseudo-device bridge, pppoe, vlan or options NETATALK. 108 #endif 109 110 #if NBPFILTER > 0 111 #include <net/bpf.h> 112 #endif 113 114 #include <net/if_ether.h> 115 #if NVLAN > 0 116 #include <net/if_vlanvar.h> 117 #endif 118 119 #if NPPPOE > 0 120 #include <net/if_pppoe.h> 121 #endif 122 123 #if NBRIDGE > 0 124 #include <net/if_bridgevar.h> 125 #endif 126 127 #include <netinet/in.h> 128 #ifdef INET 129 #include <netinet/in_var.h> 130 #endif 131 #include <netinet/if_inarp.h> 132 133 #ifdef INET6 134 #ifndef INET 135 #include <netinet/in.h> 136 #endif 137 #include <netinet6/in6_var.h> 138 #include <netinet6/nd6.h> 139 #endif 140 141 #ifdef NS 142 #include <netns/ns.h> 143 #include <netns/ns_if.h> 144 #endif 145 146 #ifdef IPX 147 #include <netipx/ipx.h> 148 #include <netipx/ipx_if.h> 149 #endif 150 151 #ifdef ISO 152 #include <netiso/argo_debug.h> 153 #include <netiso/iso.h> 154 #include <netiso/iso_var.h> 155 #include <netiso/iso_snpac.h> 156 #endif 157 158 #ifdef LLC 159 #include <netccitt/dll.h> 160 #include <netccitt/llc_var.h> 161 #endif 162 163 #if defined(LLC) && defined(CCITT) 164 extern struct ifqueue pkintrq; 165 #endif 166 167 #ifdef NETATALK 168 #include <netatalk/at.h> 169 #include <netatalk/at_var.h> 170 #include <netatalk/at_extern.h> 171 172 #define llc_snap_org_code llc_un.type_snap.org_code 173 #define llc_snap_ether_type llc_un.type_snap.ether_type 174 175 extern u_char at_org_code[3]; 176 extern u_char aarp_org_code[3]; 177 #endif /* NETATALK */ 178 179 const uint8_t etherbroadcastaddr[ETHER_ADDR_LEN] = 180 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 181 #define senderr(e) { error = (e); goto bad;} 182 183 #define SIN(x) ((struct sockaddr_in *)x) 184 185 static int ether_output __P((struct ifnet *, struct mbuf *, 186 struct sockaddr *, struct rtentry *)); 187 static void ether_input __P((struct ifnet *, struct mbuf *)); 188 189 /* 190 * Ethernet output routine. 191 * Encapsulate a packet of type family for the local net. 192 * Assumes that ifp is actually pointer to ethercom structure. 193 */ 194 static int 195 ether_output(struct ifnet *ifp, struct mbuf *m0, struct sockaddr *dst, 196 struct rtentry *rt0) 197 { 198 u_int16_t etype = 0; 199 int s, len, error = 0, hdrcmplt = 0; 200 u_char esrc[6], edst[6]; 201 struct mbuf *m = m0; 202 struct rtentry *rt; 203 struct mbuf *mcopy = (struct mbuf *)0; 204 struct ether_header *eh; 205 ALTQ_DECL(struct altq_pktattr pktattr;) 206 #ifdef INET 207 struct arphdr *ah; 208 #endif /* INET */ 209 #ifdef NETATALK 210 struct at_ifaddr *aa; 211 #endif /* NETATALK */ 212 short mflags; 213 214 #ifdef MBUFTRACE 215 m_claimm(m, ifp->if_mowner); 216 #endif 217 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 218 senderr(ENETDOWN); 219 if ((rt = rt0) != NULL) { 220 if ((rt->rt_flags & RTF_UP) == 0) { 221 if ((rt0 = rt = rtalloc1(dst, 1)) != NULL) { 222 rt->rt_refcnt--; 223 if (rt->rt_ifp != ifp) 224 return (*rt->rt_ifp->if_output) 225 (ifp, m0, dst, rt); 226 } else 227 senderr(EHOSTUNREACH); 228 } 229 if ((rt->rt_flags & RTF_GATEWAY) && dst->sa_family != AF_NS) { 230 if (rt->rt_gwroute == 0) 231 goto lookup; 232 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 233 rtfree(rt); rt = rt0; 234 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1); 235 if ((rt = rt->rt_gwroute) == 0) 236 senderr(EHOSTUNREACH); 237 /* the "G" test below also prevents rt == rt0 */ 238 if ((rt->rt_flags & RTF_GATEWAY) || 239 (rt->rt_ifp != ifp)) { 240 rt->rt_refcnt--; 241 rt0->rt_gwroute = 0; 242 senderr(EHOSTUNREACH); 243 } 244 } 245 } 246 if (rt->rt_flags & RTF_REJECT) 247 if (rt->rt_rmx.rmx_expire == 0 || 248 (u_long) time.tv_sec < rt->rt_rmx.rmx_expire) 249 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 250 } 251 252 switch (dst->sa_family) { 253 254 #ifdef INET 255 case AF_INET: 256 if (m->m_flags & M_BCAST) 257 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 258 sizeof(edst)); 259 260 else if (m->m_flags & M_MCAST) { 261 ETHER_MAP_IP_MULTICAST(&SIN(dst)->sin_addr, 262 (caddr_t)edst) 263 264 } else if (!arpresolve(ifp, rt, m, dst, edst)) 265 return (0); /* if not yet resolved */ 266 /* If broadcasting on a simplex interface, loopback a copy */ 267 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 268 mcopy = m_copy(m, 0, (int)M_COPYALL); 269 etype = htons(ETHERTYPE_IP); 270 break; 271 272 case AF_ARP: 273 ah = mtod(m, struct arphdr *); 274 if (m->m_flags & M_BCAST) 275 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 276 sizeof(edst)); 277 else 278 bcopy((caddr_t)ar_tha(ah), 279 (caddr_t)edst, sizeof(edst)); 280 281 ah->ar_hrd = htons(ARPHRD_ETHER); 282 283 switch (ntohs(ah->ar_op)) { 284 case ARPOP_REVREQUEST: 285 case ARPOP_REVREPLY: 286 etype = htons(ETHERTYPE_REVARP); 287 break; 288 289 case ARPOP_REQUEST: 290 case ARPOP_REPLY: 291 default: 292 etype = htons(ETHERTYPE_ARP); 293 } 294 295 break; 296 #endif 297 #ifdef INET6 298 case AF_INET6: 299 if (!nd6_storelladdr(ifp, rt, m, dst, (u_char *)edst)){ 300 /* something bad happened */ 301 return (0); 302 } 303 etype = htons(ETHERTYPE_IPV6); 304 break; 305 #endif 306 #ifdef NETATALK 307 case AF_APPLETALK: 308 if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) { 309 #ifdef NETATALKDEBUG 310 printf("aarpresolv failed\n"); 311 #endif /* NETATALKDEBUG */ 312 return (0); 313 } 314 /* 315 * ifaddr is the first thing in at_ifaddr 316 */ 317 aa = (struct at_ifaddr *) at_ifawithnet( 318 (struct sockaddr_at *)dst, ifp); 319 if (aa == NULL) 320 goto bad; 321 322 /* 323 * In the phase 2 case, we need to prepend an mbuf for the 324 * llc header. Since we must preserve the value of m, 325 * which is passed to us by value, we m_copy() the first 326 * mbuf, and use it for our llc header. 327 */ 328 if (aa->aa_flags & AFA_PHASE2) { 329 struct llc llc; 330 331 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 332 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 333 llc.llc_control = LLC_UI; 334 bcopy(at_org_code, llc.llc_snap_org_code, 335 sizeof(llc.llc_snap_org_code)); 336 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 337 bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc)); 338 } else { 339 etype = htons(ETHERTYPE_ATALK); 340 } 341 break; 342 #endif /* NETATALK */ 343 #ifdef NS 344 case AF_NS: 345 etype = htons(ETHERTYPE_NS); 346 bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host), 347 (caddr_t)edst, sizeof (edst)); 348 if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst))) 349 return (looutput(ifp, m, dst, rt)); 350 /* If broadcasting on a simplex interface, loopback a copy */ 351 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 352 mcopy = m_copy(m, 0, (int)M_COPYALL); 353 break; 354 #endif 355 #ifdef IPX 356 case AF_IPX: 357 etype = htons(ETHERTYPE_IPX); 358 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 359 (caddr_t)edst, sizeof (edst)); 360 /* If broadcasting on a simplex interface, loopback a copy */ 361 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 362 mcopy = m_copy(m, 0, (int)M_COPYALL); 363 break; 364 #endif 365 #ifdef ISO 366 case AF_ISO: { 367 int snpalen; 368 struct llc *l; 369 struct sockaddr_dl *sdl; 370 371 if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) && 372 sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) { 373 bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst)); 374 } else { 375 error = iso_snparesolve(ifp, (struct sockaddr_iso *)dst, 376 (char *)edst, &snpalen); 377 if (error) 378 goto bad; /* Not Resolved */ 379 } 380 /* If broadcasting on a simplex interface, loopback a copy */ 381 if (*edst & 1) 382 m->m_flags |= (M_BCAST|M_MCAST); 383 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) && 384 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 385 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 386 if (mcopy) { 387 eh = mtod(mcopy, struct ether_header *); 388 bcopy((caddr_t)edst, 389 (caddr_t)eh->ether_dhost, sizeof (edst)); 390 bcopy(LLADDR(ifp->if_sadl), 391 (caddr_t)eh->ether_shost, sizeof (edst)); 392 } 393 } 394 M_PREPEND(m, 3, M_DONTWAIT); 395 if (m == NULL) 396 return (0); 397 l = mtod(m, struct llc *); 398 l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP; 399 l->llc_control = LLC_UI; 400 #ifdef ARGO_DEBUG 401 if (argo_debug[D_ETHER]) { 402 int i; 403 printf("unoutput: sending pkt to: "); 404 for (i=0; i<6; i++) 405 printf("%x ", edst[i] & 0xff); 406 printf("\n"); 407 } 408 #endif 409 } break; 410 #endif /* ISO */ 411 #ifdef LLC 412 /* case AF_NSAP: */ 413 case AF_CCITT: { 414 struct sockaddr_dl *sdl = 415 (struct sockaddr_dl *) rt -> rt_gateway; 416 417 if (sdl && sdl->sdl_family == AF_LINK 418 && sdl->sdl_alen > 0) { 419 bcopy(LLADDR(sdl), (char *)edst, 420 sizeof(edst)); 421 } else goto bad; /* Not a link interface ? Funny ... */ 422 if ((ifp->if_flags & IFF_SIMPLEX) && (*edst & 1) && 423 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 424 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 425 if (mcopy) { 426 eh = mtod(mcopy, struct ether_header *); 427 bcopy((caddr_t)edst, 428 (caddr_t)eh->ether_dhost, sizeof (edst)); 429 bcopy(LLADDR(ifp->if_sadl), 430 (caddr_t)eh->ether_shost, sizeof (edst)); 431 } 432 } 433 #ifdef LLC_DEBUG 434 { 435 int i; 436 struct llc *l = mtod(m, struct llc *); 437 438 printf("ether_output: sending LLC2 pkt to: "); 439 for (i=0; i<6; i++) 440 printf("%x ", edst[i] & 0xff); 441 printf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n", 442 m->m_pkthdr.len, l->llc_dsap & 0xff, l->llc_ssap &0xff, 443 l->llc_control & 0xff); 444 445 } 446 #endif /* LLC_DEBUG */ 447 } break; 448 #endif /* LLC */ 449 450 case pseudo_AF_HDRCMPLT: 451 hdrcmplt = 1; 452 eh = (struct ether_header *)dst->sa_data; 453 bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, sizeof (esrc)); 454 /* FALLTHROUGH */ 455 456 case AF_UNSPEC: 457 eh = (struct ether_header *)dst->sa_data; 458 bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, sizeof (edst)); 459 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 460 etype = eh->ether_type; 461 break; 462 463 default: 464 printf("%s: can't handle af%d\n", ifp->if_xname, 465 dst->sa_family); 466 senderr(EAFNOSUPPORT); 467 } 468 469 if (mcopy) 470 (void) looutput(ifp, mcopy, dst, rt); 471 472 /* If no ether type is set, this must be a 802.2 formatted packet. 473 */ 474 if (etype == 0) 475 etype = htons(m->m_pkthdr.len); 476 /* 477 * Add local net header. If no space in first mbuf, 478 * allocate another. 479 */ 480 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 481 if (m == 0) 482 senderr(ENOBUFS); 483 eh = mtod(m, struct ether_header *); 484 /* Note: etype is already in network byte order. */ 485 #ifdef __NO_STRICT_ALIGNMENT 486 eh->ether_type = etype; 487 #else 488 { 489 uint8_t *dstp = (uint8_t *) &eh->ether_type; 490 #if BYTE_ORDER == BIG_ENDIAN 491 dstp[0] = etype >> 8; 492 dstp[1] = etype; 493 #else 494 dstp[0] = etype; 495 dstp[1] = etype >> 8; 496 #endif /* BYTE_ORDER == BIG_ENDIAN */ 497 } 498 #endif /* __NO_STRICT_ALIGNMENT */ 499 bcopy((caddr_t)edst, (caddr_t)eh->ether_dhost, sizeof (edst)); 500 if (hdrcmplt) 501 bcopy((caddr_t)esrc, (caddr_t)eh->ether_shost, 502 sizeof(eh->ether_shost)); 503 else 504 bcopy(LLADDR(ifp->if_sadl), (caddr_t)eh->ether_shost, 505 sizeof(eh->ether_shost)); 506 507 #ifdef PFIL_HOOKS 508 if ((error = pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 509 return (error); 510 if (m == NULL) 511 return (0); 512 #endif 513 514 #if NBRIDGE > 0 515 /* 516 * Bridges require special output handling. 517 */ 518 if (ifp->if_bridge) 519 return (bridge_output(ifp, m, NULL, NULL)); 520 #endif 521 522 #ifdef ALTQ 523 /* 524 * If ALTQ is enabled on the parent interface, do 525 * classification; the queueing discipline might not 526 * require classification, but might require the 527 * address family/header pointer in the pktattr. 528 */ 529 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 530 altq_etherclassify(&ifp->if_snd, m, &pktattr); 531 #endif 532 533 mflags = m->m_flags; 534 len = m->m_pkthdr.len; 535 s = splnet(); 536 /* 537 * Queue message on interface, and start output if interface 538 * not yet active. 539 */ 540 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, error); 541 if (error) { 542 /* mbuf is already freed */ 543 splx(s); 544 return (error); 545 } 546 ifp->if_obytes += len; 547 if (mflags & M_MCAST) 548 ifp->if_omcasts++; 549 if ((ifp->if_flags & IFF_OACTIVE) == 0) 550 (*ifp->if_start)(ifp); 551 splx(s); 552 return (error); 553 554 bad: 555 if (m) 556 m_freem(m); 557 return (error); 558 } 559 560 #ifdef ALTQ 561 /* 562 * This routine is a slight hack to allow a packet to be classified 563 * if the Ethernet headers are present. It will go away when ALTQ's 564 * classification engine understands link headers. 565 */ 566 void 567 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m, 568 struct altq_pktattr *pktattr) 569 { 570 struct ether_header *eh; 571 u_int16_t ether_type; 572 int hlen, af, hdrsize; 573 caddr_t hdr; 574 575 hlen = ETHER_HDR_LEN; 576 eh = mtod(m, struct ether_header *); 577 578 ether_type = htons(eh->ether_type); 579 580 if (ether_type < ETHERMTU) { 581 /* LLC/SNAP */ 582 struct llc *llc = (struct llc *)(eh + 1); 583 hlen += 8; 584 585 if (m->m_len < hlen || 586 llc->llc_dsap != LLC_SNAP_LSAP || 587 llc->llc_ssap != LLC_SNAP_LSAP || 588 llc->llc_control != LLC_UI) { 589 /* Not SNAP. */ 590 goto bad; 591 } 592 593 ether_type = htons(llc->llc_un.type_snap.ether_type); 594 } 595 596 switch (ether_type) { 597 case ETHERTYPE_IP: 598 af = AF_INET; 599 hdrsize = 20; /* sizeof(struct ip) */ 600 break; 601 602 case ETHERTYPE_IPV6: 603 af = AF_INET6; 604 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 605 break; 606 607 default: 608 af = AF_UNSPEC; 609 hdrsize = 0; 610 break; 611 } 612 613 while (m->m_len <= hlen) { 614 hlen -= m->m_len; 615 m = m->m_next; 616 } 617 if (m->m_len < (hlen + hdrsize)) { 618 /* 619 * protocol header not in a single mbuf. 620 * We can't cope with this situation right 621 * now (but it shouldn't ever happen, really, anyhow). 622 */ 623 #ifdef DEBUG 624 printf("altq_etherclassify: headers span multiple mbufs: " 625 "%d < %d\n", m->m_len, (hlen + hdrsize)); 626 #endif 627 goto bad; 628 } 629 630 m->m_data += hlen; 631 m->m_len -= hlen; 632 633 hdr = mtod(m, caddr_t); 634 635 if (ALTQ_NEEDS_CLASSIFY(ifq)) 636 pktattr->pattr_class = 637 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 638 pktattr->pattr_af = af; 639 pktattr->pattr_hdr = hdr; 640 641 m->m_data -= hlen; 642 m->m_len += hlen; 643 644 return; 645 646 bad: 647 pktattr->pattr_class = NULL; 648 pktattr->pattr_hdr = NULL; 649 pktattr->pattr_af = AF_UNSPEC; 650 } 651 #endif /* ALTQ */ 652 653 /* 654 * Process a received Ethernet packet; 655 * the packet is in the mbuf chain m with 656 * the ether header. 657 */ 658 static void 659 ether_input(struct ifnet *ifp, struct mbuf *m) 660 { 661 struct ethercom *ec = (struct ethercom *) ifp; 662 struct ifqueue *inq; 663 u_int16_t etype; 664 int s; 665 struct ether_header *eh; 666 #if defined (ISO) || defined (LLC) || defined(NETATALK) 667 struct llc *l; 668 #endif 669 670 if ((ifp->if_flags & IFF_UP) == 0) { 671 m_freem(m); 672 return; 673 } 674 675 #ifdef MBUFTRACE 676 m_claimm(m, &ec->ec_rx_mowner); 677 #endif 678 eh = mtod(m, struct ether_header *); 679 etype = ntohs(eh->ether_type); 680 681 /* 682 * Determine if the packet is within its size limits. 683 */ 684 if (m->m_pkthdr.len > 685 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 686 printf("%s: discarding oversize frame (len=%d)\n", 687 ifp->if_xname, m->m_pkthdr.len); 688 m_freem(m); 689 return; 690 } 691 692 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 693 /* 694 * If this is not a simplex interface, drop the packet 695 * if it came from us. 696 */ 697 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 698 memcmp(LLADDR(ifp->if_sadl), eh->ether_shost, 699 ETHER_ADDR_LEN) == 0) { 700 m_freem(m); 701 return; 702 } 703 704 if (memcmp(etherbroadcastaddr, 705 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 706 m->m_flags |= M_BCAST; 707 else 708 m->m_flags |= M_MCAST; 709 ifp->if_imcasts++; 710 } 711 712 /* If the CRC is still on the packet, trim it off. */ 713 if (m->m_flags & M_HASFCS) { 714 m_adj(m, -ETHER_CRC_LEN); 715 m->m_flags &= ~M_HASFCS; 716 } 717 718 ifp->if_ibytes += m->m_pkthdr.len; 719 720 #if NBRIDGE > 0 721 /* 722 * Tap the packet off here for a bridge. bridge_input() 723 * will return NULL if it has consumed the packet, otherwise 724 * it gets processed as normal. Note that bridge_input() 725 * will always return the original packet if we need to 726 * process it locally. 727 */ 728 if (ifp->if_bridge) { 729 if(m->m_flags & M_PROTO1) { 730 m->m_flags &= ~M_PROTO1; 731 } else { 732 /* clear M_PROMISC, in case the packets comes from a vlan */ 733 m->m_flags &= ~M_PROMISC; 734 m = bridge_input(ifp, m); 735 if (m == NULL) 736 return; 737 738 /* 739 * Bridge has determined that the packet is for us. 740 * Update our interface pointer -- we may have had 741 * to "bridge" the packet locally. 742 */ 743 ifp = m->m_pkthdr.rcvif; 744 } 745 } else 746 #endif /* NBRIDGE > 0 */ 747 { 748 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0 && 749 (ifp->if_flags & IFF_PROMISC) != 0 && 750 memcmp(LLADDR(ifp->if_sadl), eh->ether_dhost, 751 ETHER_ADDR_LEN) != 0) { 752 m->m_flags |= M_PROMISC; 753 } 754 } 755 756 #ifdef PFIL_HOOKS 757 if ((m->m_flags & M_PROMISC) == 0) { 758 if (pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 759 return; 760 if (m == NULL) 761 return; 762 763 eh = mtod(m, struct ether_header *); 764 etype = ntohs(eh->ether_type); 765 } 766 #endif 767 768 /* 769 * If VLANs are configured on the interface, check to 770 * see if the device performed the decapsulation and 771 * provided us with the tag. 772 */ 773 if (ec->ec_nvlans && m_tag_find(m, PACKET_TAG_VLAN, NULL) != NULL) { 774 #if NVLAN > 0 775 /* 776 * vlan_input() will either recursively call ether_input() 777 * or drop the packet. 778 */ 779 vlan_input(ifp, m); 780 #else 781 m_freem(m); 782 #endif 783 return; 784 } 785 786 /* 787 * Handle protocols that expect to have the Ethernet header 788 * (and possibly FCS) intact. 789 */ 790 switch (etype) { 791 #if NVLAN > 0 792 case ETHERTYPE_VLAN: 793 /* 794 * vlan_input() will either recursively call ether_input() 795 * or drop the packet. 796 */ 797 if (((struct ethercom *)ifp)->ec_nvlans != 0) 798 vlan_input(ifp, m); 799 else 800 m_freem(m); 801 return; 802 #endif /* NVLAN > 0 */ 803 #if NPPPOE > 0 804 case ETHERTYPE_PPPOEDISC: 805 case ETHERTYPE_PPPOE: 806 if (m->m_flags & M_PROMISC) { 807 m_freem(m); 808 return; 809 } 810 #ifndef PPPOE_SERVER 811 if (m->m_flags & (M_MCAST | M_BCAST)) { 812 m_freem(m); 813 return; 814 } 815 #endif 816 817 if (etype == ETHERTYPE_PPPOEDISC) 818 inq = &ppoediscinq; 819 else 820 inq = &ppoeinq; 821 s = splnet(); 822 if (IF_QFULL(inq)) { 823 IF_DROP(inq); 824 m_freem(m); 825 } else 826 IF_ENQUEUE(inq, m); 827 splx(s); 828 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 829 if (!callout_pending(&pppoe_softintr)) 830 callout_reset(&pppoe_softintr, 1, pppoe_softintr_handler, NULL); 831 #else 832 softintr_schedule(pppoe_softintr); 833 #endif 834 return; 835 #endif /* NPPPOE > 0 */ 836 default: 837 if (m->m_flags & M_PROMISC) { 838 m_freem(m); 839 return; 840 } 841 } 842 843 /* Strip off the Ethernet header. */ 844 m_adj(m, sizeof(struct ether_header)); 845 846 /* If the CRC is still on the packet, trim it off. */ 847 if (m->m_flags & M_HASFCS) { 848 m_adj(m, -ETHER_CRC_LEN); 849 m->m_flags &= ~M_HASFCS; 850 } 851 852 switch (etype) { 853 #ifdef INET 854 case ETHERTYPE_IP: 855 #ifdef GATEWAY 856 if (ipflow_fastforward(m)) 857 return; 858 #endif 859 schednetisr(NETISR_IP); 860 inq = &ipintrq; 861 break; 862 863 case ETHERTYPE_ARP: 864 schednetisr(NETISR_ARP); 865 inq = &arpintrq; 866 break; 867 868 case ETHERTYPE_REVARP: 869 revarpinput(m); /* XXX queue? */ 870 return; 871 #endif 872 #ifdef INET6 873 case ETHERTYPE_IPV6: 874 schednetisr(NETISR_IPV6); 875 inq = &ip6intrq; 876 break; 877 #endif 878 #ifdef NS 879 case ETHERTYPE_NS: 880 schednetisr(NETISR_NS); 881 inq = &nsintrq; 882 break; 883 884 #endif 885 #ifdef IPX 886 case ETHERTYPE_IPX: 887 schednetisr(NETISR_IPX); 888 inq = &ipxintrq; 889 break; 890 #endif 891 #ifdef NETATALK 892 case ETHERTYPE_ATALK: 893 schednetisr(NETISR_ATALK); 894 inq = &atintrq1; 895 break; 896 case ETHERTYPE_AARP: 897 /* probably this should be done with a NETISR as well */ 898 aarpinput(ifp, m); /* XXX */ 899 return; 900 #endif /* NETATALK */ 901 default: 902 #if defined (ISO) || defined (LLC) || defined (NETATALK) 903 if (etype > ETHERMTU) 904 goto dropanyway; 905 l = mtod(m, struct llc *); 906 switch (l->llc_dsap) { 907 #ifdef NETATALK 908 case LLC_SNAP_LSAP: 909 switch (l->llc_control) { 910 case LLC_UI: 911 if (l->llc_ssap != LLC_SNAP_LSAP) { 912 goto dropanyway; 913 } 914 915 if (Bcmp(&(l->llc_snap_org_code)[0], 916 at_org_code, sizeof(at_org_code)) == 0 && 917 ntohs(l->llc_snap_ether_type) == 918 ETHERTYPE_ATALK) { 919 inq = &atintrq2; 920 m_adj(m, sizeof(struct llc)); 921 schednetisr(NETISR_ATALK); 922 break; 923 } 924 925 if (Bcmp(&(l->llc_snap_org_code)[0], 926 aarp_org_code, 927 sizeof(aarp_org_code)) == 0 && 928 ntohs(l->llc_snap_ether_type) == 929 ETHERTYPE_AARP) { 930 m_adj( m, sizeof(struct llc)); 931 aarpinput(ifp, m); /* XXX */ 932 return; 933 } 934 935 default: 936 goto dropanyway; 937 } 938 break; 939 #endif /* NETATALK */ 940 #ifdef ISO 941 case LLC_ISO_LSAP: 942 switch (l->llc_control) { 943 case LLC_UI: 944 /* LLC_UI_P forbidden in class 1 service */ 945 if ((l->llc_dsap == LLC_ISO_LSAP) && 946 (l->llc_ssap == LLC_ISO_LSAP)) { 947 /* LSAP for ISO */ 948 if (m->m_pkthdr.len > etype) 949 m_adj(m, etype - m->m_pkthdr.len); 950 m->m_data += 3; /* XXX */ 951 m->m_len -= 3; /* XXX */ 952 m->m_pkthdr.len -= 3; /* XXX */ 953 M_PREPEND(m, sizeof *eh, M_DONTWAIT); 954 if (m == 0) 955 return; 956 *mtod(m, struct ether_header *) = *eh; 957 #ifdef ARGO_DEBUG 958 if (argo_debug[D_ETHER]) 959 printf("clnp packet"); 960 #endif 961 schednetisr(NETISR_ISO); 962 inq = &clnlintrq; 963 break; 964 } 965 goto dropanyway; 966 967 case LLC_XID: 968 case LLC_XID_P: 969 if(m->m_len < 6) 970 goto dropanyway; 971 l->llc_window = 0; 972 l->llc_fid = 9; 973 l->llc_class = 1; 974 l->llc_dsap = l->llc_ssap = 0; 975 /* Fall through to */ 976 case LLC_TEST: 977 case LLC_TEST_P: 978 { 979 struct sockaddr sa; 980 struct ether_header *eh2; 981 int i; 982 u_char c = l->llc_dsap; 983 984 l->llc_dsap = l->llc_ssap; 985 l->llc_ssap = c; 986 if (m->m_flags & (M_BCAST | M_MCAST)) 987 bcopy(LLADDR(ifp->if_sadl), 988 (caddr_t)eh->ether_dhost, 6); 989 sa.sa_family = AF_UNSPEC; 990 sa.sa_len = sizeof(sa); 991 eh2 = (struct ether_header *)sa.sa_data; 992 for (i = 0; i < 6; i++) { 993 eh2->ether_shost[i] = c = 994 eh->ether_dhost[i]; 995 eh2->ether_dhost[i] = 996 eh->ether_dhost[i] = 997 eh->ether_shost[i]; 998 eh->ether_shost[i] = c; 999 } 1000 ifp->if_output(ifp, m, &sa, NULL); 1001 return; 1002 } 1003 default: 1004 m_freem(m); 1005 return; 1006 } 1007 break; 1008 #endif /* ISO */ 1009 #ifdef LLC 1010 case LLC_X25_LSAP: 1011 { 1012 if (m->m_pkthdr.len > etype) 1013 m_adj(m, etype - m->m_pkthdr.len); 1014 M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT); 1015 if (m == 0) 1016 return; 1017 if ( !sdl_sethdrif(ifp, eh->ether_shost, LLC_X25_LSAP, 1018 eh->ether_dhost, LLC_X25_LSAP, 6, 1019 mtod(m, struct sdl_hdr *))) 1020 panic("ETHER cons addr failure"); 1021 mtod(m, struct sdl_hdr *)->sdlhdr_len = etype; 1022 #ifdef LLC_DEBUG 1023 printf("llc packet\n"); 1024 #endif /* LLC_DEBUG */ 1025 schednetisr(NETISR_CCITT); 1026 inq = &llcintrq; 1027 break; 1028 } 1029 #endif /* LLC */ 1030 dropanyway: 1031 default: 1032 m_freem(m); 1033 return; 1034 } 1035 #else /* ISO || LLC || NETATALK*/ 1036 m_freem(m); 1037 return; 1038 #endif /* ISO || LLC || NETATALK*/ 1039 } 1040 1041 s = splnet(); 1042 if (IF_QFULL(inq)) { 1043 IF_DROP(inq); 1044 m_freem(m); 1045 } else 1046 IF_ENQUEUE(inq, m); 1047 splx(s); 1048 } 1049 1050 /* 1051 * Convert Ethernet address to printable (loggable) representation. 1052 */ 1053 static char digits[] = "0123456789abcdef"; 1054 char * 1055 ether_sprintf(const u_char *ap) 1056 { 1057 static char etherbuf[18]; 1058 char *cp = etherbuf; 1059 int i; 1060 1061 for (i = 0; i < 6; i++) { 1062 *cp++ = digits[*ap >> 4]; 1063 *cp++ = digits[*ap++ & 0xf]; 1064 *cp++ = ':'; 1065 } 1066 *--cp = 0; 1067 return (etherbuf); 1068 } 1069 1070 /* 1071 * Perform common duties while attaching to interface list 1072 */ 1073 void 1074 ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 1075 { 1076 struct ethercom *ec = (struct ethercom *)ifp; 1077 1078 ifp->if_type = IFT_ETHER; 1079 ifp->if_addrlen = ETHER_ADDR_LEN; 1080 ifp->if_hdrlen = ETHER_HDR_LEN; 1081 ifp->if_dlt = DLT_EN10MB; 1082 ifp->if_mtu = ETHERMTU; 1083 ifp->if_output = ether_output; 1084 ifp->if_input = ether_input; 1085 if (ifp->if_baudrate == 0) 1086 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 1087 1088 if_alloc_sadl(ifp); 1089 memcpy(LLADDR(ifp->if_sadl), lla, ifp->if_addrlen); 1090 1091 LIST_INIT(&ec->ec_multiaddrs); 1092 ifp->if_broadcastaddr = etherbroadcastaddr; 1093 #if NBPFILTER > 0 1094 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 1095 #endif 1096 #ifdef MBUFTRACE 1097 strlcpy(ec->ec_tx_mowner.mo_name, ifp->if_xname, 1098 sizeof(ec->ec_tx_mowner.mo_name)); 1099 strlcpy(ec->ec_tx_mowner.mo_descr, "tx", 1100 sizeof(ec->ec_tx_mowner.mo_descr)); 1101 strlcpy(ec->ec_rx_mowner.mo_name, ifp->if_xname, 1102 sizeof(ec->ec_rx_mowner.mo_name)); 1103 strlcpy(ec->ec_rx_mowner.mo_descr, "rx", 1104 sizeof(ec->ec_rx_mowner.mo_descr)); 1105 MOWNER_ATTACH(&ec->ec_tx_mowner); 1106 MOWNER_ATTACH(&ec->ec_rx_mowner); 1107 ifp->if_mowner = &ec->ec_tx_mowner; 1108 #endif 1109 } 1110 1111 void 1112 ether_ifdetach(struct ifnet *ifp) 1113 { 1114 struct ethercom *ec = (void *) ifp; 1115 struct ether_multi *enm; 1116 int s; 1117 1118 #if NBRIDGE > 0 1119 if (ifp->if_bridge) 1120 bridge_ifdetach(ifp); 1121 #endif 1122 1123 #if NBPFILTER > 0 1124 bpfdetach(ifp); 1125 #endif 1126 1127 #if NVLAN > 0 1128 if (ec->ec_nvlans) 1129 vlan_ifdetach(ifp); 1130 #endif 1131 1132 s = splnet(); 1133 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1134 LIST_REMOVE(enm, enm_list); 1135 free(enm, M_IFMADDR); 1136 ec->ec_multicnt--; 1137 } 1138 splx(s); 1139 1140 #if 0 /* done in if_detach() */ 1141 if_free_sadl(ifp); 1142 #endif 1143 1144 MOWNER_DETACH(&ec->ec_rx_mowner); 1145 MOWNER_DETACH(&ec->ec_tx_mowner); 1146 } 1147 1148 #if 0 1149 /* 1150 * This is for reference. We have a table-driven version 1151 * of the little-endian crc32 generator, which is faster 1152 * than the double-loop. 1153 */ 1154 u_int32_t 1155 ether_crc32_le(const u_int8_t *buf, size_t len) 1156 { 1157 u_int32_t c, crc, carry; 1158 size_t i, j; 1159 1160 crc = 0xffffffffU; /* initial value */ 1161 1162 for (i = 0; i < len; i++) { 1163 c = buf[i]; 1164 for (j = 0; j < 8; j++) { 1165 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1166 crc >>= 1; 1167 c >>= 1; 1168 if (carry) 1169 crc = (crc ^ ETHER_CRC_POLY_LE); 1170 } 1171 } 1172 1173 return (crc); 1174 } 1175 #else 1176 u_int32_t 1177 ether_crc32_le(const u_int8_t *buf, size_t len) 1178 { 1179 static const u_int32_t crctab[] = { 1180 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1181 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1182 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1183 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1184 }; 1185 u_int32_t crc; 1186 size_t i; 1187 1188 crc = 0xffffffffU; /* initial value */ 1189 1190 for (i = 0; i < len; i++) { 1191 crc ^= buf[i]; 1192 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1193 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1194 } 1195 1196 return (crc); 1197 } 1198 #endif 1199 1200 u_int32_t 1201 ether_crc32_be(const u_int8_t *buf, size_t len) 1202 { 1203 u_int32_t c, crc, carry; 1204 size_t i, j; 1205 1206 crc = 0xffffffffU; /* initial value */ 1207 1208 for (i = 0; i < len; i++) { 1209 c = buf[i]; 1210 for (j = 0; j < 8; j++) { 1211 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1212 crc <<= 1; 1213 c >>= 1; 1214 if (carry) 1215 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1216 } 1217 } 1218 1219 return (crc); 1220 } 1221 1222 #ifdef INET 1223 const uint8_t ether_ipmulticast_min[ETHER_ADDR_LEN] = 1224 { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1225 const uint8_t ether_ipmulticast_max[ETHER_ADDR_LEN] = 1226 { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1227 #endif 1228 #ifdef INET6 1229 const uint8_t ether_ip6multicast_min[ETHER_ADDR_LEN] = 1230 { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1231 const uint8_t ether_ip6multicast_max[ETHER_ADDR_LEN] = 1232 { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1233 #endif 1234 1235 /* 1236 * Convert a sockaddr into an Ethernet address or range of Ethernet 1237 * addresses. 1238 */ 1239 int 1240 ether_multiaddr(struct sockaddr *sa, u_int8_t addrlo[ETHER_ADDR_LEN], 1241 u_int8_t addrhi[ETHER_ADDR_LEN]) 1242 { 1243 #ifdef INET 1244 struct sockaddr_in *sin; 1245 #endif /* INET */ 1246 #ifdef INET6 1247 struct sockaddr_in6 *sin6; 1248 #endif /* INET6 */ 1249 1250 switch (sa->sa_family) { 1251 1252 case AF_UNSPEC: 1253 bcopy(sa->sa_data, addrlo, ETHER_ADDR_LEN); 1254 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1255 break; 1256 1257 #ifdef INET 1258 case AF_INET: 1259 sin = satosin(sa); 1260 if (sin->sin_addr.s_addr == INADDR_ANY) { 1261 /* 1262 * An IP address of INADDR_ANY means listen to 1263 * or stop listening to all of the Ethernet 1264 * multicast addresses used for IP. 1265 * (This is for the sake of IP multicast routers.) 1266 */ 1267 bcopy(ether_ipmulticast_min, addrlo, ETHER_ADDR_LEN); 1268 bcopy(ether_ipmulticast_max, addrhi, ETHER_ADDR_LEN); 1269 } 1270 else { 1271 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1272 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1273 } 1274 break; 1275 #endif 1276 #ifdef INET6 1277 case AF_INET6: 1278 sin6 = satosin6(sa); 1279 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1280 /* 1281 * An IP6 address of 0 means listen to or stop 1282 * listening to all of the Ethernet multicast 1283 * address used for IP6. 1284 * (This is used for multicast routers.) 1285 */ 1286 bcopy(ether_ip6multicast_min, addrlo, ETHER_ADDR_LEN); 1287 bcopy(ether_ip6multicast_max, addrhi, ETHER_ADDR_LEN); 1288 } else { 1289 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1290 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1291 } 1292 break; 1293 #endif 1294 1295 default: 1296 return (EAFNOSUPPORT); 1297 } 1298 return (0); 1299 } 1300 1301 /* 1302 * Add an Ethernet multicast address or range of addresses to the list for a 1303 * given interface. 1304 */ 1305 int 1306 ether_addmulti(struct ifreq *ifr, struct ethercom *ec) 1307 { 1308 struct ether_multi *enm; 1309 u_char addrlo[ETHER_ADDR_LEN]; 1310 u_char addrhi[ETHER_ADDR_LEN]; 1311 int s = splnet(), error; 1312 1313 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1314 if (error != 0) { 1315 splx(s); 1316 return (error); 1317 } 1318 1319 /* 1320 * Verify that we have valid Ethernet multicast addresses. 1321 */ 1322 if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) { 1323 splx(s); 1324 return (EINVAL); 1325 } 1326 /* 1327 * See if the address range is already in the list. 1328 */ 1329 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1330 if (enm != NULL) { 1331 /* 1332 * Found it; just increment the reference count. 1333 */ 1334 ++enm->enm_refcount; 1335 splx(s); 1336 return (0); 1337 } 1338 /* 1339 * New address or range; malloc a new multicast record 1340 * and link it into the interface's multicast list. 1341 */ 1342 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1343 if (enm == NULL) { 1344 splx(s); 1345 return (ENOBUFS); 1346 } 1347 bcopy(addrlo, enm->enm_addrlo, 6); 1348 bcopy(addrhi, enm->enm_addrhi, 6); 1349 enm->enm_refcount = 1; 1350 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1351 ec->ec_multicnt++; 1352 splx(s); 1353 /* 1354 * Return ENETRESET to inform the driver that the list has changed 1355 * and its reception filter should be adjusted accordingly. 1356 */ 1357 return (ENETRESET); 1358 } 1359 1360 /* 1361 * Delete a multicast address record. 1362 */ 1363 int 1364 ether_delmulti(struct ifreq *ifr, struct ethercom *ec) 1365 { 1366 struct ether_multi *enm; 1367 u_char addrlo[ETHER_ADDR_LEN]; 1368 u_char addrhi[ETHER_ADDR_LEN]; 1369 int s = splnet(), error; 1370 1371 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1372 if (error != 0) { 1373 splx(s); 1374 return (error); 1375 } 1376 1377 /* 1378 * Look ur the address in our list. 1379 */ 1380 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1381 if (enm == NULL) { 1382 splx(s); 1383 return (ENXIO); 1384 } 1385 if (--enm->enm_refcount != 0) { 1386 /* 1387 * Still some claims to this record. 1388 */ 1389 splx(s); 1390 return (0); 1391 } 1392 /* 1393 * No remaining claims to this record; unlink and free it. 1394 */ 1395 LIST_REMOVE(enm, enm_list); 1396 free(enm, M_IFMADDR); 1397 ec->ec_multicnt--; 1398 splx(s); 1399 /* 1400 * Return ENETRESET to inform the driver that the list has changed 1401 * and its reception filter should be adjusted accordingly. 1402 */ 1403 return (ENETRESET); 1404 } 1405 1406 /* 1407 * Common ioctls for Ethernet interfaces. Note, we must be 1408 * called at splnet(). 1409 */ 1410 int 1411 ether_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1412 { 1413 struct ethercom *ec = (void *) ifp; 1414 struct ifreq *ifr = (struct ifreq *)data; 1415 struct ifaddr *ifa = (struct ifaddr *)data; 1416 int error = 0; 1417 1418 switch (cmd) { 1419 case SIOCSIFADDR: 1420 ifp->if_flags |= IFF_UP; 1421 switch (ifa->ifa_addr->sa_family) { 1422 case AF_LINK: 1423 { 1424 struct sockaddr_dl *sdl = 1425 (struct sockaddr_dl *) ifa->ifa_addr; 1426 1427 if (sdl->sdl_type != IFT_ETHER || 1428 sdl->sdl_alen != ifp->if_addrlen) { 1429 error = EINVAL; 1430 break; 1431 } 1432 1433 memcpy(LLADDR(ifp->if_sadl), LLADDR(sdl), 1434 ifp->if_addrlen); 1435 1436 /* Set new address. */ 1437 error = (*ifp->if_init)(ifp); 1438 break; 1439 } 1440 #ifdef INET 1441 case AF_INET: 1442 if ((ifp->if_flags & IFF_RUNNING) == 0 && 1443 (error = (*ifp->if_init)(ifp)) != 0) 1444 break; 1445 arp_ifinit(ifp, ifa); 1446 break; 1447 #endif /* INET */ 1448 #ifdef NS 1449 case AF_NS: 1450 { 1451 struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; 1452 1453 if (ns_nullhost(*ina)) 1454 ina->x_host = *(union ns_host *) 1455 LLADDR(ifp->if_sadl); 1456 else 1457 memcpy(LLADDR(ifp->if_sadl), 1458 ina->x_host.c_host, ifp->if_addrlen); 1459 /* Set new address. */ 1460 error = (*ifp->if_init)(ifp); 1461 break; 1462 } 1463 #endif /* NS */ 1464 default: 1465 if ((ifp->if_flags & IFF_RUNNING) == 0) 1466 error = (*ifp->if_init)(ifp); 1467 break; 1468 } 1469 break; 1470 1471 case SIOCGIFADDR: 1472 memcpy(((struct sockaddr *)&ifr->ifr_data)->sa_data, 1473 LLADDR(ifp->if_sadl), ETHER_ADDR_LEN); 1474 break; 1475 1476 case SIOCSIFMTU: 1477 { 1478 int maxmtu; 1479 1480 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1481 maxmtu = ETHERMTU_JUMBO; 1482 else 1483 maxmtu = ETHERMTU; 1484 1485 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1486 error = EINVAL; 1487 else { 1488 ifp->if_mtu = ifr->ifr_mtu; 1489 1490 /* Make sure the device notices the MTU change. */ 1491 if (ifp->if_flags & IFF_UP) 1492 error = (*ifp->if_init)(ifp); 1493 } 1494 break; 1495 } 1496 1497 case SIOCSIFFLAGS: 1498 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_RUNNING) { 1499 /* 1500 * If interface is marked down and it is running, 1501 * then stop and disable it. 1502 */ 1503 (*ifp->if_stop)(ifp, 1); 1504 } else if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_UP) { 1505 /* 1506 * If interface is marked up and it is stopped, then 1507 * start it. 1508 */ 1509 error = (*ifp->if_init)(ifp); 1510 } else if ((ifp->if_flags & IFF_UP) != 0) { 1511 /* 1512 * Reset the interface to pick up changes in any other 1513 * flags that affect the hardware state. 1514 */ 1515 error = (*ifp->if_init)(ifp); 1516 } 1517 break; 1518 1519 case SIOCADDMULTI: 1520 error = ether_addmulti(ifr, ec); 1521 break; 1522 1523 case SIOCDELMULTI: 1524 error = ether_delmulti(ifr, ec); 1525 break; 1526 1527 default: 1528 error = ENOTTY; 1529 } 1530 1531 return (error); 1532 } 1533