1 /* $NetBSD: if_ethersubr.c,v 1.112 2003/06/23 11:02:10 martin 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 1.112 2003/06/23 11:02:10 martin 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_ipx.h" 76 #include "opt_mbuftrace.h" 77 #include "opt_ns.h" 78 #include "opt_gateway.h" 79 #include "opt_pfil_hooks.h" 80 #include "vlan.h" 81 #include "pppoe.h" 82 #include "bridge.h" 83 #include "bpfilter.h" 84 #include "arp.h" 85 86 #include <sys/param.h> 87 #include <sys/systm.h> 88 #include <sys/kernel.h> 89 #include <sys/callout.h> 90 #include <sys/malloc.h> 91 #include <sys/mbuf.h> 92 #include <sys/protosw.h> 93 #include <sys/socket.h> 94 #include <sys/ioctl.h> 95 #include <sys/errno.h> 96 #include <sys/syslog.h> 97 98 #include <machine/cpu.h> 99 100 #include <net/if.h> 101 #include <net/netisr.h> 102 #include <net/route.h> 103 #include <net/if_llc.h> 104 #include <net/if_dl.h> 105 #include <net/if_types.h> 106 107 #if NARP == 0 108 /* 109 * XXX there should really be a way to issue this warning from within config(8) 110 */ 111 #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. 112 #endif 113 114 #if NBPFILTER > 0 115 #include <net/bpf.h> 116 #endif 117 118 #include <net/if_ether.h> 119 #if NVLAN > 0 120 #include <net/if_vlanvar.h> 121 #endif 122 123 #if NPPPOE > 0 124 #include <net/if_pppoe.h> 125 #endif 126 127 #if NBRIDGE > 0 128 #include <net/if_bridgevar.h> 129 #endif 130 131 #include <netinet/in.h> 132 #ifdef INET 133 #include <netinet/in_var.h> 134 #endif 135 #include <netinet/if_inarp.h> 136 137 #ifdef INET6 138 #ifndef INET 139 #include <netinet/in.h> 140 #endif 141 #include <netinet6/in6_var.h> 142 #include <netinet6/nd6.h> 143 #endif 144 145 #ifdef NS 146 #include <netns/ns.h> 147 #include <netns/ns_if.h> 148 #endif 149 150 #ifdef IPX 151 #include <netipx/ipx.h> 152 #include <netipx/ipx_if.h> 153 #endif 154 155 #ifdef ISO 156 #include <netiso/argo_debug.h> 157 #include <netiso/iso.h> 158 #include <netiso/iso_var.h> 159 #include <netiso/iso_snpac.h> 160 #endif 161 162 #ifdef LLC 163 #include <netccitt/dll.h> 164 #include <netccitt/llc_var.h> 165 #endif 166 167 #if defined(LLC) && defined(CCITT) 168 extern struct ifqueue pkintrq; 169 #endif 170 171 #ifdef NETATALK 172 #include <netatalk/at.h> 173 #include <netatalk/at_var.h> 174 #include <netatalk/at_extern.h> 175 176 #define llc_snap_org_code llc_un.type_snap.org_code 177 #define llc_snap_ether_type llc_un.type_snap.ether_type 178 179 extern u_char at_org_code[3]; 180 extern u_char aarp_org_code[3]; 181 #endif /* NETATALK */ 182 183 u_char etherbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 184 #define senderr(e) { error = (e); goto bad;} 185 186 #define SIN(x) ((struct sockaddr_in *)x) 187 188 static int ether_output __P((struct ifnet *, struct mbuf *, 189 struct sockaddr *, struct rtentry *)); 190 static void ether_input __P((struct ifnet *, struct mbuf *)); 191 192 /* 193 * Ethernet output routine. 194 * Encapsulate a packet of type family for the local net. 195 * Assumes that ifp is actually pointer to ethercom structure. 196 */ 197 static int 198 ether_output(struct ifnet *ifp, struct mbuf *m0, struct sockaddr *dst, 199 struct rtentry *rt0) 200 { 201 u_int16_t etype = 0; 202 int s, len, error = 0, hdrcmplt = 0; 203 u_char esrc[6], edst[6]; 204 struct mbuf *m = m0; 205 struct rtentry *rt; 206 struct mbuf *mcopy = (struct mbuf *)0; 207 struct ether_header *eh; 208 ALTQ_DECL(struct altq_pktattr pktattr;) 209 #ifdef INET 210 struct arphdr *ah; 211 #endif /* INET */ 212 #ifdef NETATALK 213 struct at_ifaddr *aa; 214 #endif /* NETATALK */ 215 short mflags; 216 217 #ifdef MBUFTRACE 218 m_claim(m, ifp->if_mowner); 219 #endif 220 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 221 senderr(ENETDOWN); 222 if ((rt = rt0) != NULL) { 223 if ((rt->rt_flags & RTF_UP) == 0) { 224 if ((rt0 = rt = rtalloc1(dst, 1)) != NULL) { 225 rt->rt_refcnt--; 226 if (rt->rt_ifp != ifp) 227 return (*rt->rt_ifp->if_output) 228 (ifp, m0, dst, rt); 229 } else 230 senderr(EHOSTUNREACH); 231 } 232 if ((rt->rt_flags & RTF_GATEWAY) && dst->sa_family != AF_NS) { 233 if (rt->rt_gwroute == 0) 234 goto lookup; 235 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 236 rtfree(rt); rt = rt0; 237 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1); 238 if ((rt = rt->rt_gwroute) == 0) 239 senderr(EHOSTUNREACH); 240 /* the "G" test below also prevents rt == rt0 */ 241 if ((rt->rt_flags & RTF_GATEWAY) || 242 (rt->rt_ifp != ifp)) { 243 rt->rt_refcnt--; 244 rt0->rt_gwroute = 0; 245 senderr(EHOSTUNREACH); 246 } 247 } 248 } 249 if (rt->rt_flags & RTF_REJECT) 250 if (rt->rt_rmx.rmx_expire == 0 || 251 (u_long) time.tv_sec < rt->rt_rmx.rmx_expire) 252 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 253 } 254 255 switch (dst->sa_family) { 256 257 #ifdef INET 258 case AF_INET: 259 if (m->m_flags & M_BCAST) 260 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 261 sizeof(edst)); 262 263 else if (m->m_flags & M_MCAST) { 264 ETHER_MAP_IP_MULTICAST(&SIN(dst)->sin_addr, 265 (caddr_t)edst) 266 267 } else if (!arpresolve(ifp, rt, m, dst, edst)) 268 return (0); /* if not yet resolved */ 269 /* If broadcasting on a simplex interface, loopback a copy */ 270 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 271 mcopy = m_copy(m, 0, (int)M_COPYALL); 272 etype = htons(ETHERTYPE_IP); 273 break; 274 275 case AF_ARP: 276 ah = mtod(m, struct arphdr *); 277 if (m->m_flags & M_BCAST) 278 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 279 sizeof(edst)); 280 else 281 bcopy((caddr_t)ar_tha(ah), 282 (caddr_t)edst, sizeof(edst)); 283 284 ah->ar_hrd = htons(ARPHRD_ETHER); 285 286 switch (ntohs(ah->ar_op)) { 287 case ARPOP_REVREQUEST: 288 case ARPOP_REVREPLY: 289 etype = htons(ETHERTYPE_REVARP); 290 break; 291 292 case ARPOP_REQUEST: 293 case ARPOP_REPLY: 294 default: 295 etype = htons(ETHERTYPE_ARP); 296 } 297 298 break; 299 #endif 300 #ifdef INET6 301 case AF_INET6: 302 if (!nd6_storelladdr(ifp, rt, m, dst, (u_char *)edst)){ 303 /* something bad happened */ 304 return (0); 305 } 306 etype = htons(ETHERTYPE_IPV6); 307 break; 308 #endif 309 #ifdef NETATALK 310 case AF_APPLETALK: 311 if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) { 312 #ifdef NETATALKDEBUG 313 printf("aarpresolv failed\n"); 314 #endif /* NETATALKDEBUG */ 315 return (0); 316 } 317 /* 318 * ifaddr is the first thing in at_ifaddr 319 */ 320 aa = (struct at_ifaddr *) at_ifawithnet( 321 (struct sockaddr_at *)dst, ifp); 322 if (aa == NULL) 323 goto bad; 324 325 /* 326 * In the phase 2 case, we need to prepend an mbuf for the 327 * llc header. Since we must preserve the value of m, 328 * which is passed to us by value, we m_copy() the first 329 * mbuf, and use it for our llc header. 330 */ 331 if (aa->aa_flags & AFA_PHASE2) { 332 struct llc llc; 333 334 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 335 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 336 llc.llc_control = LLC_UI; 337 bcopy(at_org_code, llc.llc_snap_org_code, 338 sizeof(llc.llc_snap_org_code)); 339 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 340 bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc)); 341 } else { 342 etype = htons(ETHERTYPE_ATALK); 343 } 344 break; 345 #endif /* NETATALK */ 346 #ifdef NS 347 case AF_NS: 348 etype = htons(ETHERTYPE_NS); 349 bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host), 350 (caddr_t)edst, sizeof (edst)); 351 if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst))) 352 return (looutput(ifp, m, dst, rt)); 353 /* If broadcasting on a simplex interface, loopback a copy */ 354 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 355 mcopy = m_copy(m, 0, (int)M_COPYALL); 356 break; 357 #endif 358 #ifdef IPX 359 case AF_IPX: 360 etype = htons(ETHERTYPE_IPX); 361 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 362 (caddr_t)edst, sizeof (edst)); 363 /* If broadcasting on a simplex interface, loopback a copy */ 364 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 365 mcopy = m_copy(m, 0, (int)M_COPYALL); 366 break; 367 #endif 368 #ifdef ISO 369 case AF_ISO: { 370 int snpalen; 371 struct llc *l; 372 struct sockaddr_dl *sdl; 373 374 if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) && 375 sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) { 376 bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst)); 377 } else { 378 error = iso_snparesolve(ifp, (struct sockaddr_iso *)dst, 379 (char *)edst, &snpalen); 380 if (error) 381 goto bad; /* Not Resolved */ 382 } 383 /* If broadcasting on a simplex interface, loopback a copy */ 384 if (*edst & 1) 385 m->m_flags |= (M_BCAST|M_MCAST); 386 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) && 387 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 388 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 389 if (mcopy) { 390 eh = mtod(mcopy, struct ether_header *); 391 bcopy((caddr_t)edst, 392 (caddr_t)eh->ether_dhost, sizeof (edst)); 393 bcopy(LLADDR(ifp->if_sadl), 394 (caddr_t)eh->ether_shost, sizeof (edst)); 395 } 396 } 397 M_PREPEND(m, 3, M_DONTWAIT); 398 if (m == NULL) 399 return (0); 400 l = mtod(m, struct llc *); 401 l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP; 402 l->llc_control = LLC_UI; 403 #ifdef ARGO_DEBUG 404 if (argo_debug[D_ETHER]) { 405 int i; 406 printf("unoutput: sending pkt to: "); 407 for (i=0; i<6; i++) 408 printf("%x ", edst[i] & 0xff); 409 printf("\n"); 410 } 411 #endif 412 } break; 413 #endif /* ISO */ 414 #ifdef LLC 415 /* case AF_NSAP: */ 416 case AF_CCITT: { 417 struct sockaddr_dl *sdl = 418 (struct sockaddr_dl *) rt -> rt_gateway; 419 420 if (sdl && sdl->sdl_family == AF_LINK 421 && sdl->sdl_alen > 0) { 422 bcopy(LLADDR(sdl), (char *)edst, 423 sizeof(edst)); 424 } else goto bad; /* Not a link interface ? Funny ... */ 425 if ((ifp->if_flags & IFF_SIMPLEX) && (*edst & 1) && 426 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 427 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 428 if (mcopy) { 429 eh = mtod(mcopy, struct ether_header *); 430 bcopy((caddr_t)edst, 431 (caddr_t)eh->ether_dhost, sizeof (edst)); 432 bcopy(LLADDR(ifp->if_sadl), 433 (caddr_t)eh->ether_shost, sizeof (edst)); 434 } 435 } 436 #ifdef LLC_DEBUG 437 { 438 int i; 439 struct llc *l = mtod(m, struct llc *); 440 441 printf("ether_output: sending LLC2 pkt to: "); 442 for (i=0; i<6; i++) 443 printf("%x ", edst[i] & 0xff); 444 printf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n", 445 m->m_pkthdr.len, l->llc_dsap & 0xff, l->llc_ssap &0xff, 446 l->llc_control & 0xff); 447 448 } 449 #endif /* LLC_DEBUG */ 450 } break; 451 #endif /* LLC */ 452 453 case pseudo_AF_HDRCMPLT: 454 hdrcmplt = 1; 455 eh = (struct ether_header *)dst->sa_data; 456 bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, sizeof (esrc)); 457 /* FALLTHROUGH */ 458 459 case AF_UNSPEC: 460 eh = (struct ether_header *)dst->sa_data; 461 bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, sizeof (edst)); 462 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 463 etype = eh->ether_type; 464 break; 465 466 default: 467 printf("%s: can't handle af%d\n", ifp->if_xname, 468 dst->sa_family); 469 senderr(EAFNOSUPPORT); 470 } 471 472 if (mcopy) 473 (void) looutput(ifp, mcopy, dst, rt); 474 475 /* If no ether type is set, this must be a 802.2 formatted packet. 476 */ 477 if (etype == 0) 478 etype = htons(m->m_pkthdr.len); 479 /* 480 * Add local net header. If no space in first mbuf, 481 * allocate another. 482 */ 483 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 484 if (m == 0) 485 senderr(ENOBUFS); 486 eh = mtod(m, struct ether_header *); 487 /* Note: etype is already in network byte order. */ 488 #ifdef __NO_STRICT_ALIGNMENT 489 eh->ether_type = etype; 490 #else 491 { 492 uint8_t *dstp = (uint8_t *) &eh->ether_type; 493 #if BYTE_ORDER == BIG_ENDIAN 494 dstp[0] = etype >> 8; 495 dstp[1] = etype; 496 #else 497 dstp[0] = etype; 498 dstp[1] = etype >> 8; 499 #endif /* BYTE_ORDER == BIG_ENDIAN */ 500 } 501 #endif /* __NO_STRICT_ALIGNMENT */ 502 bcopy((caddr_t)edst, (caddr_t)eh->ether_dhost, sizeof (edst)); 503 if (hdrcmplt) 504 bcopy((caddr_t)esrc, (caddr_t)eh->ether_shost, 505 sizeof(eh->ether_shost)); 506 else 507 bcopy(LLADDR(ifp->if_sadl), (caddr_t)eh->ether_shost, 508 sizeof(eh->ether_shost)); 509 510 #ifdef PFIL_HOOKS 511 if ((error = pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 512 return (error); 513 if (m == NULL) 514 return (0); 515 #endif 516 517 #if NBRIDGE > 0 518 /* 519 * Bridges require special output handling. 520 */ 521 if (ifp->if_bridge) 522 return (bridge_output(ifp, m, NULL, NULL)); 523 #endif 524 525 #ifdef ALTQ 526 /* 527 * If ALTQ is enabled on the parent interface, do 528 * classification; the queueing discipline might not 529 * require classification, but might require the 530 * address family/header pointer in the pktattr. 531 */ 532 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 533 altq_etherclassify(&ifp->if_snd, m, &pktattr); 534 #endif 535 536 mflags = m->m_flags; 537 len = m->m_pkthdr.len; 538 s = splnet(); 539 /* 540 * Queue message on interface, and start output if interface 541 * not yet active. 542 */ 543 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, error); 544 if (error) { 545 /* mbuf is already freed */ 546 splx(s); 547 return (error); 548 } 549 ifp->if_obytes += len; 550 if (mflags & M_MCAST) 551 ifp->if_omcasts++; 552 if ((ifp->if_flags & IFF_OACTIVE) == 0) 553 (*ifp->if_start)(ifp); 554 splx(s); 555 return (error); 556 557 bad: 558 if (m) 559 m_freem(m); 560 return (error); 561 } 562 563 #ifdef ALTQ 564 /* 565 * This routine is a slight hack to allow a packet to be classified 566 * if the Ethernet headers are present. It will go away when ALTQ's 567 * classification engine understands link headers. 568 */ 569 void 570 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m, 571 struct altq_pktattr *pktattr) 572 { 573 struct ether_header *eh; 574 u_int16_t ether_type; 575 int hlen, af, hdrsize; 576 caddr_t hdr; 577 578 hlen = ETHER_HDR_LEN; 579 eh = mtod(m, struct ether_header *); 580 581 ether_type = htons(eh->ether_type); 582 583 if (ether_type < ETHERMTU) { 584 /* LLC/SNAP */ 585 struct llc *llc = (struct llc *)(eh + 1); 586 hlen += 8; 587 588 if (m->m_len < hlen || 589 llc->llc_dsap != LLC_SNAP_LSAP || 590 llc->llc_ssap != LLC_SNAP_LSAP || 591 llc->llc_control != LLC_UI) { 592 /* Not SNAP. */ 593 goto bad; 594 } 595 596 ether_type = htons(llc->llc_un.type_snap.ether_type); 597 } 598 599 switch (ether_type) { 600 case ETHERTYPE_IP: 601 af = AF_INET; 602 hdrsize = 20; /* sizeof(struct ip) */ 603 break; 604 605 case ETHERTYPE_IPV6: 606 af = AF_INET6; 607 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 608 break; 609 610 default: 611 af = AF_UNSPEC; 612 hdrsize = 0; 613 break; 614 } 615 616 while (m->m_len <= hlen) { 617 hlen -= m->m_len; 618 m = m->m_next; 619 } 620 if (m->m_len < (hlen + hdrsize)) { 621 /* 622 * protocol header not in a single mbuf. 623 * We can't cope with this situation right 624 * now (but it shouldn't ever happen, really, anyhow). 625 */ 626 #ifdef DEBUG 627 printf("altq_etherclassify: headers span multiple mbufs: " 628 "%d < %d\n", m->m_len, (hlen + hdrsize)); 629 #endif 630 goto bad; 631 } 632 633 m->m_data += hlen; 634 m->m_len -= hlen; 635 636 hdr = mtod(m, caddr_t); 637 638 if (ALTQ_NEEDS_CLASSIFY(ifq)) 639 pktattr->pattr_class = 640 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 641 pktattr->pattr_af = af; 642 pktattr->pattr_hdr = hdr; 643 644 m->m_data -= hlen; 645 m->m_len += hlen; 646 647 return; 648 649 bad: 650 pktattr->pattr_class = NULL; 651 pktattr->pattr_hdr = NULL; 652 pktattr->pattr_af = AF_UNSPEC; 653 } 654 #endif /* ALTQ */ 655 656 /* 657 * Process a received Ethernet packet; 658 * the packet is in the mbuf chain m with 659 * the ether header. 660 */ 661 static void 662 ether_input(struct ifnet *ifp, struct mbuf *m) 663 { 664 struct ethercom *ec = (struct ethercom *) ifp; 665 struct ifqueue *inq; 666 u_int16_t etype; 667 int s; 668 struct ether_header *eh; 669 struct m_tag *mtag; 670 #if defined (ISO) || defined (LLC) || defined(NETATALK) 671 struct llc *l; 672 #endif 673 674 if ((ifp->if_flags & IFF_UP) == 0) { 675 m_freem(m); 676 return; 677 } 678 679 #ifdef MBUFTRACE 680 m_claim(m, &ec->ec_rx_mowner); 681 #endif 682 eh = mtod(m, struct ether_header *); 683 etype = ntohs(eh->ether_type); 684 685 /* 686 * Determine if the packet is within its size limits. 687 */ 688 if (m->m_pkthdr.len > 689 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 690 printf("%s: discarding oversize frame (len=%d)\n", 691 ifp->if_xname, m->m_pkthdr.len); 692 m_freem(m); 693 return; 694 } 695 696 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 697 /* 698 * If this is not a simplex interface, drop the packet 699 * if it came from us. 700 */ 701 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 702 memcmp(LLADDR(ifp->if_sadl), eh->ether_shost, 703 ETHER_ADDR_LEN) == 0) { 704 m_freem(m); 705 return; 706 } 707 708 if (memcmp(etherbroadcastaddr, 709 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 710 m->m_flags |= M_BCAST; 711 else 712 m->m_flags |= M_MCAST; 713 ifp->if_imcasts++; 714 } 715 716 /* If the CRC is still on the packet, trim it off. */ 717 if (m->m_flags & M_HASFCS) { 718 m_adj(m, -ETHER_CRC_LEN); 719 m->m_flags &= ~M_HASFCS; 720 } 721 722 ifp->if_ibytes += m->m_pkthdr.len; 723 724 #if NBRIDGE > 0 725 /* 726 * Tap the packet off here for a bridge. bridge_input() 727 * will return NULL if it has consumed the packet, otherwise 728 * it gets processed as normal. Note that bridge_input() 729 * will always return the original packet if we need to 730 * process it locally. 731 */ 732 if (ifp->if_bridge) { 733 /* clear M_PROMISC, in case the packets comes from a vlan */ 734 m->m_flags &= ~M_PROMISC; 735 m = bridge_input(ifp, m); 736 if (m == NULL) 737 return; 738 739 /* 740 * Bridge has determined that the packet is for us. 741 * Update our interface pointer -- we may have had 742 * to "bridge" the packet locally. 743 */ 744 ifp = m->m_pkthdr.rcvif; 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 && 774 (mtag = m_tag_find(m, PACKET_TAG_VLAN, NULL)) != NULL) { 775 #if NVLAN > 0 776 /* 777 * vlan_input() will either recursively call ether_input() 778 * or drop the packet. 779 */ 780 vlan_input(ifp, m); 781 #else 782 m_freem(m); 783 #endif 784 return; 785 } 786 787 /* 788 * Handle protocols that expect to have the Ethernet header 789 * (and possibly FCS) intact. 790 */ 791 switch (etype) { 792 #if NVLAN > 0 793 case ETHERTYPE_VLAN: 794 /* 795 * vlan_input() will either recursively call ether_input() 796 * or drop the packet. 797 */ 798 if (((struct ethercom *)ifp)->ec_nvlans != 0) 799 vlan_input(ifp, m); 800 else 801 m_freem(m); 802 return; 803 #endif /* NVLAN > 0 */ 804 #if NPPPOE > 0 805 case ETHERTYPE_PPPOEDISC: 806 case ETHERTYPE_PPPOE: 807 if (m->m_flags & M_PROMISC) { 808 m_freem(m); 809 return; 810 } 811 #ifndef PPPOE_SERVER 812 if (m->m_flags & (M_MCAST | M_BCAST)) { 813 m_freem(m); 814 return; 815 } 816 #endif 817 818 if (etype == ETHERTYPE_PPPOEDISC) 819 inq = &ppoediscinq; 820 else 821 inq = &ppoeinq; 822 s = splnet(); 823 if (IF_QFULL(inq)) { 824 IF_DROP(inq); 825 m_freem(m); 826 } else 827 IF_ENQUEUE(inq, m); 828 splx(s); 829 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 830 if (!callout_pending(&pppoe_softintr)) 831 callout_reset(&pppoe_softintr, 1, pppoe_softintr_handler, NULL); 832 #else 833 softintr_schedule(pppoe_softintr); 834 #endif 835 return; 836 #endif /* NPPPOE > 0 */ 837 default: 838 if (m->m_flags & M_PROMISC) { 839 m_freem(m); 840 return; 841 } 842 } 843 844 /* Strip off the Ethernet header. */ 845 m_adj(m, sizeof(struct ether_header)); 846 847 /* If the CRC is still on the packet, trim it off. */ 848 if (m->m_flags & M_HASFCS) { 849 m_adj(m, -ETHER_CRC_LEN); 850 m->m_flags &= ~M_HASFCS; 851 } 852 853 switch (etype) { 854 #ifdef INET 855 case ETHERTYPE_IP: 856 #ifdef GATEWAY 857 if (ipflow_fastforward(m)) 858 return; 859 #endif 860 schednetisr(NETISR_IP); 861 inq = &ipintrq; 862 break; 863 864 case ETHERTYPE_ARP: 865 schednetisr(NETISR_ARP); 866 inq = &arpintrq; 867 break; 868 869 case ETHERTYPE_REVARP: 870 revarpinput(m); /* XXX queue? */ 871 return; 872 #endif 873 #ifdef INET6 874 case ETHERTYPE_IPV6: 875 schednetisr(NETISR_IPV6); 876 inq = &ip6intrq; 877 break; 878 #endif 879 #ifdef NS 880 case ETHERTYPE_NS: 881 schednetisr(NETISR_NS); 882 inq = &nsintrq; 883 break; 884 885 #endif 886 #ifdef IPX 887 case ETHERTYPE_IPX: 888 schednetisr(NETISR_IPX); 889 inq = &ipxintrq; 890 break; 891 #endif 892 #ifdef NETATALK 893 case ETHERTYPE_ATALK: 894 schednetisr(NETISR_ATALK); 895 inq = &atintrq1; 896 break; 897 case ETHERTYPE_AARP: 898 /* probably this should be done with a NETISR as well */ 899 aarpinput(ifp, m); /* XXX */ 900 return; 901 #endif /* NETATALK */ 902 default: 903 #if defined (ISO) || defined (LLC) || defined (NETATALK) 904 if (etype > ETHERMTU) 905 goto dropanyway; 906 l = mtod(m, struct llc *); 907 switch (l->llc_dsap) { 908 #ifdef NETATALK 909 case LLC_SNAP_LSAP: 910 switch (l->llc_control) { 911 case LLC_UI: 912 if (l->llc_ssap != LLC_SNAP_LSAP) { 913 goto dropanyway; 914 } 915 916 if (Bcmp(&(l->llc_snap_org_code)[0], 917 at_org_code, sizeof(at_org_code)) == 0 && 918 ntohs(l->llc_snap_ether_type) == 919 ETHERTYPE_ATALK) { 920 inq = &atintrq2; 921 m_adj(m, sizeof(struct llc)); 922 schednetisr(NETISR_ATALK); 923 break; 924 } 925 926 if (Bcmp(&(l->llc_snap_org_code)[0], 927 aarp_org_code, 928 sizeof(aarp_org_code)) == 0 && 929 ntohs(l->llc_snap_ether_type) == 930 ETHERTYPE_AARP) { 931 m_adj( m, sizeof(struct llc)); 932 aarpinput(ifp, m); /* XXX */ 933 return; 934 } 935 936 default: 937 goto dropanyway; 938 } 939 break; 940 #endif /* NETATALK */ 941 #ifdef ISO 942 case LLC_ISO_LSAP: 943 switch (l->llc_control) { 944 case LLC_UI: 945 /* LLC_UI_P forbidden in class 1 service */ 946 if ((l->llc_dsap == LLC_ISO_LSAP) && 947 (l->llc_ssap == LLC_ISO_LSAP)) { 948 /* LSAP for ISO */ 949 if (m->m_pkthdr.len > etype) 950 m_adj(m, etype - m->m_pkthdr.len); 951 m->m_data += 3; /* XXX */ 952 m->m_len -= 3; /* XXX */ 953 m->m_pkthdr.len -= 3; /* XXX */ 954 M_PREPEND(m, sizeof *eh, M_DONTWAIT); 955 if (m == 0) 956 return; 957 *mtod(m, struct ether_header *) = *eh; 958 #ifdef ARGO_DEBUG 959 if (argo_debug[D_ETHER]) 960 printf("clnp packet"); 961 #endif 962 schednetisr(NETISR_ISO); 963 inq = &clnlintrq; 964 break; 965 } 966 goto dropanyway; 967 968 case LLC_XID: 969 case LLC_XID_P: 970 if(m->m_len < 6) 971 goto dropanyway; 972 l->llc_window = 0; 973 l->llc_fid = 9; 974 l->llc_class = 1; 975 l->llc_dsap = l->llc_ssap = 0; 976 /* Fall through to */ 977 case LLC_TEST: 978 case LLC_TEST_P: 979 { 980 struct sockaddr sa; 981 struct ether_header *eh2; 982 int i; 983 u_char c = l->llc_dsap; 984 985 l->llc_dsap = l->llc_ssap; 986 l->llc_ssap = c; 987 if (m->m_flags & (M_BCAST | M_MCAST)) 988 bcopy(LLADDR(ifp->if_sadl), 989 (caddr_t)eh->ether_dhost, 6); 990 sa.sa_family = AF_UNSPEC; 991 sa.sa_len = sizeof(sa); 992 eh2 = (struct ether_header *)sa.sa_data; 993 for (i = 0; i < 6; i++) { 994 eh2->ether_shost[i] = c = 995 eh->ether_dhost[i]; 996 eh2->ether_dhost[i] = 997 eh->ether_dhost[i] = 998 eh->ether_shost[i]; 999 eh->ether_shost[i] = c; 1000 } 1001 ifp->if_output(ifp, m, &sa, NULL); 1002 return; 1003 } 1004 default: 1005 m_freem(m); 1006 return; 1007 } 1008 break; 1009 #endif /* ISO */ 1010 #ifdef LLC 1011 case LLC_X25_LSAP: 1012 { 1013 if (m->m_pkthdr.len > etype) 1014 m_adj(m, etype - m->m_pkthdr.len); 1015 M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT); 1016 if (m == 0) 1017 return; 1018 if ( !sdl_sethdrif(ifp, eh->ether_shost, LLC_X25_LSAP, 1019 eh->ether_dhost, LLC_X25_LSAP, 6, 1020 mtod(m, struct sdl_hdr *))) 1021 panic("ETHER cons addr failure"); 1022 mtod(m, struct sdl_hdr *)->sdlhdr_len = etype; 1023 #ifdef LLC_DEBUG 1024 printf("llc packet\n"); 1025 #endif /* LLC_DEBUG */ 1026 schednetisr(NETISR_CCITT); 1027 inq = &llcintrq; 1028 break; 1029 } 1030 #endif /* LLC */ 1031 dropanyway: 1032 default: 1033 m_freem(m); 1034 return; 1035 } 1036 #else /* ISO || LLC || NETATALK*/ 1037 m_freem(m); 1038 return; 1039 #endif /* ISO || LLC || NETATALK*/ 1040 } 1041 1042 s = splnet(); 1043 if (IF_QFULL(inq)) { 1044 IF_DROP(inq); 1045 m_freem(m); 1046 } else 1047 IF_ENQUEUE(inq, m); 1048 splx(s); 1049 } 1050 1051 /* 1052 * Convert Ethernet address to printable (loggable) representation. 1053 */ 1054 static char digits[] = "0123456789abcdef"; 1055 char * 1056 ether_sprintf(const u_char *ap) 1057 { 1058 static char etherbuf[18]; 1059 char *cp = etherbuf; 1060 int i; 1061 1062 for (i = 0; i < 6; i++) { 1063 *cp++ = digits[*ap >> 4]; 1064 *cp++ = digits[*ap++ & 0xf]; 1065 *cp++ = ':'; 1066 } 1067 *--cp = 0; 1068 return (etherbuf); 1069 } 1070 1071 /* 1072 * Perform common duties while attaching to interface list 1073 */ 1074 void 1075 ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 1076 { 1077 struct ethercom *ec = (struct ethercom *)ifp; 1078 1079 ifp->if_type = IFT_ETHER; 1080 ifp->if_addrlen = ETHER_ADDR_LEN; 1081 ifp->if_hdrlen = ETHER_HDR_LEN; 1082 ifp->if_dlt = DLT_EN10MB; 1083 ifp->if_mtu = ETHERMTU; 1084 ifp->if_output = ether_output; 1085 ifp->if_input = ether_input; 1086 if (ifp->if_baudrate == 0) 1087 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 1088 1089 if_alloc_sadl(ifp); 1090 memcpy(LLADDR(ifp->if_sadl), lla, ifp->if_addrlen); 1091 1092 LIST_INIT(&ec->ec_multiaddrs); 1093 ifp->if_broadcastaddr = etherbroadcastaddr; 1094 #if NBPFILTER > 0 1095 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 1096 #endif 1097 #ifdef MBUFTRACE 1098 strlcpy(ec->ec_tx_mowner.mo_name, ifp->if_xname, 1099 sizeof(ec->ec_tx_mowner.mo_name)); 1100 strlcpy(ec->ec_tx_mowner.mo_descr, "tx", 1101 sizeof(ec->ec_tx_mowner.mo_descr)); 1102 strlcpy(ec->ec_rx_mowner.mo_name, ifp->if_xname, 1103 sizeof(ec->ec_rx_mowner.mo_name)); 1104 strlcpy(ec->ec_rx_mowner.mo_descr, "rx", 1105 sizeof(ec->ec_rx_mowner.mo_descr)); 1106 MOWNER_ATTACH(&ec->ec_tx_mowner); 1107 MOWNER_ATTACH(&ec->ec_rx_mowner); 1108 ifp->if_mowner = &ec->ec_tx_mowner; 1109 #endif 1110 } 1111 1112 void 1113 ether_ifdetach(struct ifnet *ifp) 1114 { 1115 struct ethercom *ec = (void *) ifp; 1116 struct ether_multi *enm; 1117 int s; 1118 1119 #if NBPFILTER > 0 1120 bpfdetach(ifp); 1121 #endif 1122 1123 #if NVLAN > 0 1124 if (ec->ec_nvlans) 1125 vlan_ifdetach(ifp); 1126 #endif 1127 1128 s = splnet(); 1129 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1130 LIST_REMOVE(enm, enm_list); 1131 free(enm, M_IFMADDR); 1132 ec->ec_multicnt--; 1133 } 1134 splx(s); 1135 1136 #if 0 /* done in if_detach() */ 1137 if_free_sadl(ifp); 1138 #endif 1139 1140 MOWNER_DETACH(&ec->ec_rx_mowner); 1141 MOWNER_DETACH(&ec->ec_tx_mowner); 1142 } 1143 1144 #if 0 1145 /* 1146 * This is for reference. We have a table-driven version 1147 * of the little-endian crc32 generator, which is faster 1148 * than the double-loop. 1149 */ 1150 u_int32_t 1151 ether_crc32_le(const u_int8_t *buf, size_t len) 1152 { 1153 u_int32_t c, crc, carry; 1154 size_t i, j; 1155 1156 crc = 0xffffffffU; /* initial value */ 1157 1158 for (i = 0; i < len; i++) { 1159 c = buf[i]; 1160 for (j = 0; j < 8; j++) { 1161 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1162 crc >>= 1; 1163 c >>= 1; 1164 if (carry) 1165 crc = (crc ^ ETHER_CRC_POLY_LE); 1166 } 1167 } 1168 1169 return (crc); 1170 } 1171 #else 1172 u_int32_t 1173 ether_crc32_le(const u_int8_t *buf, size_t len) 1174 { 1175 static const u_int32_t crctab[] = { 1176 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1177 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1178 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1179 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1180 }; 1181 u_int32_t crc; 1182 size_t i; 1183 1184 crc = 0xffffffffU; /* initial value */ 1185 1186 for (i = 0; i < len; i++) { 1187 crc ^= buf[i]; 1188 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1189 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1190 } 1191 1192 return (crc); 1193 } 1194 #endif 1195 1196 u_int32_t 1197 ether_crc32_be(const u_int8_t *buf, size_t len) 1198 { 1199 u_int32_t c, crc, carry; 1200 size_t i, j; 1201 1202 crc = 0xffffffffU; /* initial value */ 1203 1204 for (i = 0; i < len; i++) { 1205 c = buf[i]; 1206 for (j = 0; j < 8; j++) { 1207 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1208 crc <<= 1; 1209 c >>= 1; 1210 if (carry) 1211 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1212 } 1213 } 1214 1215 return (crc); 1216 } 1217 1218 #ifdef INET 1219 u_char ether_ipmulticast_min[6] = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1220 u_char ether_ipmulticast_max[6] = { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1221 #endif 1222 #ifdef INET6 1223 u_char ether_ip6multicast_min[6] = { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1224 u_char ether_ip6multicast_max[6] = { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1225 #endif 1226 1227 /* 1228 * Convert a sockaddr into an Ethernet address or range of Ethernet 1229 * addresses. 1230 */ 1231 int 1232 ether_multiaddr(struct sockaddr *sa, u_int8_t addrlo[ETHER_ADDR_LEN], 1233 u_int8_t addrhi[ETHER_ADDR_LEN]) 1234 { 1235 #ifdef INET 1236 struct sockaddr_in *sin; 1237 #endif /* INET */ 1238 #ifdef INET6 1239 struct sockaddr_in6 *sin6; 1240 #endif /* INET6 */ 1241 1242 switch (sa->sa_family) { 1243 1244 case AF_UNSPEC: 1245 bcopy(sa->sa_data, addrlo, ETHER_ADDR_LEN); 1246 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1247 break; 1248 1249 #ifdef INET 1250 case AF_INET: 1251 sin = satosin(sa); 1252 if (sin->sin_addr.s_addr == INADDR_ANY) { 1253 /* 1254 * An IP address of INADDR_ANY means listen to 1255 * or stop listening to all of the Ethernet 1256 * multicast addresses used for IP. 1257 * (This is for the sake of IP multicast routers.) 1258 */ 1259 bcopy(ether_ipmulticast_min, addrlo, ETHER_ADDR_LEN); 1260 bcopy(ether_ipmulticast_max, addrhi, ETHER_ADDR_LEN); 1261 } 1262 else { 1263 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1264 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1265 } 1266 break; 1267 #endif 1268 #ifdef INET6 1269 case AF_INET6: 1270 sin6 = satosin6(sa); 1271 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1272 /* 1273 * An IP6 address of 0 means listen to or stop 1274 * listening to all of the Ethernet multicast 1275 * address used for IP6. 1276 * (This is used for multicast routers.) 1277 */ 1278 bcopy(ether_ip6multicast_min, addrlo, ETHER_ADDR_LEN); 1279 bcopy(ether_ip6multicast_max, addrhi, ETHER_ADDR_LEN); 1280 } else { 1281 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1282 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1283 } 1284 break; 1285 #endif 1286 1287 default: 1288 return (EAFNOSUPPORT); 1289 } 1290 return (0); 1291 } 1292 1293 /* 1294 * Add an Ethernet multicast address or range of addresses to the list for a 1295 * given interface. 1296 */ 1297 int 1298 ether_addmulti(struct ifreq *ifr, struct ethercom *ec) 1299 { 1300 struct ether_multi *enm; 1301 u_char addrlo[ETHER_ADDR_LEN]; 1302 u_char addrhi[ETHER_ADDR_LEN]; 1303 int s = splnet(), error; 1304 1305 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1306 if (error != 0) { 1307 splx(s); 1308 return (error); 1309 } 1310 1311 /* 1312 * Verify that we have valid Ethernet multicast addresses. 1313 */ 1314 if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) { 1315 splx(s); 1316 return (EINVAL); 1317 } 1318 /* 1319 * See if the address range is already in the list. 1320 */ 1321 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1322 if (enm != NULL) { 1323 /* 1324 * Found it; just increment the reference count. 1325 */ 1326 ++enm->enm_refcount; 1327 splx(s); 1328 return (0); 1329 } 1330 /* 1331 * New address or range; malloc a new multicast record 1332 * and link it into the interface's multicast list. 1333 */ 1334 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1335 if (enm == NULL) { 1336 splx(s); 1337 return (ENOBUFS); 1338 } 1339 bcopy(addrlo, enm->enm_addrlo, 6); 1340 bcopy(addrhi, enm->enm_addrhi, 6); 1341 enm->enm_ec = ec; 1342 enm->enm_refcount = 1; 1343 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1344 ec->ec_multicnt++; 1345 splx(s); 1346 /* 1347 * Return ENETRESET to inform the driver that the list has changed 1348 * and its reception filter should be adjusted accordingly. 1349 */ 1350 return (ENETRESET); 1351 } 1352 1353 /* 1354 * Delete a multicast address record. 1355 */ 1356 int 1357 ether_delmulti(struct ifreq *ifr, struct ethercom *ec) 1358 { 1359 struct ether_multi *enm; 1360 u_char addrlo[ETHER_ADDR_LEN]; 1361 u_char addrhi[ETHER_ADDR_LEN]; 1362 int s = splnet(), error; 1363 1364 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1365 if (error != 0) { 1366 splx(s); 1367 return (error); 1368 } 1369 1370 /* 1371 * Look ur the address in our list. 1372 */ 1373 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1374 if (enm == NULL) { 1375 splx(s); 1376 return (ENXIO); 1377 } 1378 if (--enm->enm_refcount != 0) { 1379 /* 1380 * Still some claims to this record. 1381 */ 1382 splx(s); 1383 return (0); 1384 } 1385 /* 1386 * No remaining claims to this record; unlink and free it. 1387 */ 1388 LIST_REMOVE(enm, enm_list); 1389 free(enm, M_IFMADDR); 1390 ec->ec_multicnt--; 1391 splx(s); 1392 /* 1393 * Return ENETRESET to inform the driver that the list has changed 1394 * and its reception filter should be adjusted accordingly. 1395 */ 1396 return (ENETRESET); 1397 } 1398 1399 /* 1400 * Common ioctls for Ethernet interfaces. Note, we must be 1401 * called at splnet(). 1402 */ 1403 int 1404 ether_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1405 { 1406 struct ethercom *ec = (void *) ifp; 1407 struct ifreq *ifr = (struct ifreq *)data; 1408 struct ifaddr *ifa = (struct ifaddr *)data; 1409 int error = 0; 1410 1411 switch (cmd) { 1412 case SIOCSIFADDR: 1413 ifp->if_flags |= IFF_UP; 1414 switch (ifa->ifa_addr->sa_family) { 1415 case AF_LINK: 1416 { 1417 struct sockaddr_dl *sdl = 1418 (struct sockaddr_dl *) ifa->ifa_addr; 1419 1420 if (sdl->sdl_type != IFT_ETHER || 1421 sdl->sdl_alen != ifp->if_addrlen) { 1422 error = EINVAL; 1423 break; 1424 } 1425 1426 memcpy(LLADDR(ifp->if_sadl), LLADDR(sdl), 1427 ifp->if_addrlen); 1428 1429 /* Set new address. */ 1430 error = (*ifp->if_init)(ifp); 1431 break; 1432 } 1433 #ifdef INET 1434 case AF_INET: 1435 if ((ifp->if_flags & IFF_RUNNING) == 0 && 1436 (error = (*ifp->if_init)(ifp)) != 0) 1437 break; 1438 arp_ifinit(ifp, ifa); 1439 break; 1440 #endif /* INET */ 1441 #ifdef NS 1442 case AF_NS: 1443 { 1444 struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; 1445 1446 if (ns_nullhost(*ina)) 1447 ina->x_host = *(union ns_host *) 1448 LLADDR(ifp->if_sadl); 1449 else 1450 memcpy(LLADDR(ifp->if_sadl), 1451 ina->x_host.c_host, ifp->if_addrlen); 1452 /* Set new address. */ 1453 error = (*ifp->if_init)(ifp); 1454 break; 1455 } 1456 #endif /* NS */ 1457 default: 1458 if ((ifp->if_flags & IFF_RUNNING) == 0) 1459 error = (*ifp->if_init)(ifp); 1460 break; 1461 } 1462 break; 1463 1464 case SIOCGIFADDR: 1465 memcpy(((struct sockaddr *)&ifr->ifr_data)->sa_data, 1466 LLADDR(ifp->if_sadl), ETHER_ADDR_LEN); 1467 break; 1468 1469 case SIOCSIFMTU: 1470 { 1471 int maxmtu; 1472 1473 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1474 maxmtu = ETHERMTU_JUMBO; 1475 else 1476 maxmtu = ETHERMTU; 1477 1478 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1479 error = EINVAL; 1480 else { 1481 ifp->if_mtu = ifr->ifr_mtu; 1482 1483 /* Make sure the device notices the MTU change. */ 1484 if (ifp->if_flags & IFF_UP) 1485 error = (*ifp->if_init)(ifp); 1486 } 1487 break; 1488 } 1489 1490 case SIOCSIFFLAGS: 1491 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_RUNNING) { 1492 /* 1493 * If interface is marked down and it is running, 1494 * then stop and disable it. 1495 */ 1496 (*ifp->if_stop)(ifp, 1); 1497 } else if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_UP) { 1498 /* 1499 * If interface is marked up and it is stopped, then 1500 * start it. 1501 */ 1502 error = (*ifp->if_init)(ifp); 1503 } else if ((ifp->if_flags & IFF_UP) != 0) { 1504 /* 1505 * Reset the interface to pick up changes in any other 1506 * flags that affect the hardware state. 1507 */ 1508 error = (*ifp->if_init)(ifp); 1509 } 1510 break; 1511 1512 case SIOCADDMULTI: 1513 error = ether_addmulti(ifr, ec); 1514 break; 1515 1516 case SIOCDELMULTI: 1517 error = ether_delmulti(ifr, ec); 1518 break; 1519 1520 default: 1521 error = ENOTTY; 1522 } 1523 1524 return (error); 1525 } 1526