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sys/net/if_ethersubr.c
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1 /* $NetBSD: if_ethersubr.c,v 1.114.2.2 2004/07/14 11:08:01 tron 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 1.114.2.2 2004/07/14 11:08:01 tron 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 u_char etherbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 180 #define senderr(e) { error = (e); goto bad;} 181 182 #define SIN(x) ((struct sockaddr_in *)x) 183 184 static int ether_output __P((struct ifnet *, struct mbuf *, 185 struct sockaddr *, struct rtentry *)); 186 static void ether_input __P((struct ifnet *, struct mbuf *)); 187 188 /* 189 * Ethernet output routine. 190 * Encapsulate a packet of type family for the local net. 191 * Assumes that ifp is actually pointer to ethercom structure. 192 */ 193 static int 194 ether_output(struct ifnet *ifp, struct mbuf *m0, struct sockaddr *dst, 195 struct rtentry *rt0) 196 { 197 u_int16_t etype = 0; 198 int s, len, error = 0, hdrcmplt = 0; 199 u_char esrc[6], edst[6]; 200 struct mbuf *m = m0; 201 struct rtentry *rt; 202 struct mbuf *mcopy = (struct mbuf *)0; 203 struct ether_header *eh; 204 ALTQ_DECL(struct altq_pktattr pktattr;) 205 #ifdef INET 206 struct arphdr *ah; 207 #endif /* INET */ 208 #ifdef NETATALK 209 struct at_ifaddr *aa; 210 #endif /* NETATALK */ 211 short mflags; 212 213 #ifdef MBUFTRACE 214 m_claimm(m, ifp->if_mowner); 215 #endif 216 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 217 senderr(ENETDOWN); 218 if ((rt = rt0) != NULL) { 219 if ((rt->rt_flags & RTF_UP) == 0) { 220 if ((rt0 = rt = rtalloc1(dst, 1)) != NULL) { 221 rt->rt_refcnt--; 222 if (rt->rt_ifp != ifp) 223 return (*rt->rt_ifp->if_output) 224 (ifp, m0, dst, rt); 225 } else 226 senderr(EHOSTUNREACH); 227 } 228 if ((rt->rt_flags & RTF_GATEWAY) && dst->sa_family != AF_NS) { 229 if (rt->rt_gwroute == 0) 230 goto lookup; 231 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 232 rtfree(rt); rt = rt0; 233 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1); 234 if ((rt = rt->rt_gwroute) == 0) 235 senderr(EHOSTUNREACH); 236 /* the "G" test below also prevents rt == rt0 */ 237 if ((rt->rt_flags & RTF_GATEWAY) || 238 (rt->rt_ifp != ifp)) { 239 rt->rt_refcnt--; 240 rt0->rt_gwroute = 0; 241 senderr(EHOSTUNREACH); 242 } 243 } 244 } 245 if (rt->rt_flags & RTF_REJECT) 246 if (rt->rt_rmx.rmx_expire == 0 || 247 (u_long) time.tv_sec < rt->rt_rmx.rmx_expire) 248 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 249 } 250 251 switch (dst->sa_family) { 252 253 #ifdef INET 254 case AF_INET: 255 if (m->m_flags & M_BCAST) 256 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 257 sizeof(edst)); 258 259 else if (m->m_flags & M_MCAST) { 260 ETHER_MAP_IP_MULTICAST(&SIN(dst)->sin_addr, 261 (caddr_t)edst) 262 263 } else if (!arpresolve(ifp, rt, m, dst, edst)) 264 return (0); /* if not yet resolved */ 265 /* If broadcasting on a simplex interface, loopback a copy */ 266 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 267 mcopy = m_copy(m, 0, (int)M_COPYALL); 268 etype = htons(ETHERTYPE_IP); 269 break; 270 271 case AF_ARP: 272 ah = mtod(m, struct arphdr *); 273 if (m->m_flags & M_BCAST) 274 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 275 sizeof(edst)); 276 else 277 bcopy((caddr_t)ar_tha(ah), 278 (caddr_t)edst, sizeof(edst)); 279 280 ah->ar_hrd = htons(ARPHRD_ETHER); 281 282 switch (ntohs(ah->ar_op)) { 283 case ARPOP_REVREQUEST: 284 case ARPOP_REVREPLY: 285 etype = htons(ETHERTYPE_REVARP); 286 break; 287 288 case ARPOP_REQUEST: 289 case ARPOP_REPLY: 290 default: 291 etype = htons(ETHERTYPE_ARP); 292 } 293 294 break; 295 #endif 296 #ifdef INET6 297 case AF_INET6: 298 if (!nd6_storelladdr(ifp, rt, m, dst, (u_char *)edst)){ 299 /* something bad happened */ 300 return (0); 301 } 302 etype = htons(ETHERTYPE_IPV6); 303 break; 304 #endif 305 #ifdef NETATALK 306 case AF_APPLETALK: 307 if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) { 308 #ifdef NETATALKDEBUG 309 printf("aarpresolv failed\n"); 310 #endif /* NETATALKDEBUG */ 311 return (0); 312 } 313 /* 314 * ifaddr is the first thing in at_ifaddr 315 */ 316 aa = (struct at_ifaddr *) at_ifawithnet( 317 (struct sockaddr_at *)dst, ifp); 318 if (aa == NULL) 319 goto bad; 320 321 /* 322 * In the phase 2 case, we need to prepend an mbuf for the 323 * llc header. Since we must preserve the value of m, 324 * which is passed to us by value, we m_copy() the first 325 * mbuf, and use it for our llc header. 326 */ 327 if (aa->aa_flags & AFA_PHASE2) { 328 struct llc llc; 329 330 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 331 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 332 llc.llc_control = LLC_UI; 333 bcopy(at_org_code, llc.llc_snap_org_code, 334 sizeof(llc.llc_snap_org_code)); 335 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 336 bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc)); 337 } else { 338 etype = htons(ETHERTYPE_ATALK); 339 } 340 break; 341 #endif /* NETATALK */ 342 #ifdef NS 343 case AF_NS: 344 etype = htons(ETHERTYPE_NS); 345 bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host), 346 (caddr_t)edst, sizeof (edst)); 347 if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst))) 348 return (looutput(ifp, m, dst, rt)); 349 /* If broadcasting on a simplex interface, loopback a copy */ 350 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 351 mcopy = m_copy(m, 0, (int)M_COPYALL); 352 break; 353 #endif 354 #ifdef IPX 355 case AF_IPX: 356 etype = htons(ETHERTYPE_IPX); 357 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 358 (caddr_t)edst, sizeof (edst)); 359 /* If broadcasting on a simplex interface, loopback a copy */ 360 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 361 mcopy = m_copy(m, 0, (int)M_COPYALL); 362 break; 363 #endif 364 #ifdef ISO 365 case AF_ISO: { 366 int snpalen; 367 struct llc *l; 368 struct sockaddr_dl *sdl; 369 370 if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) && 371 sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) { 372 bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst)); 373 } else { 374 error = iso_snparesolve(ifp, (struct sockaddr_iso *)dst, 375 (char *)edst, &snpalen); 376 if (error) 377 goto bad; /* Not Resolved */ 378 } 379 /* If broadcasting on a simplex interface, loopback a copy */ 380 if (*edst & 1) 381 m->m_flags |= (M_BCAST|M_MCAST); 382 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) && 383 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 384 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 385 if (mcopy) { 386 eh = mtod(mcopy, struct ether_header *); 387 bcopy((caddr_t)edst, 388 (caddr_t)eh->ether_dhost, sizeof (edst)); 389 bcopy(LLADDR(ifp->if_sadl), 390 (caddr_t)eh->ether_shost, sizeof (edst)); 391 } 392 } 393 M_PREPEND(m, 3, M_DONTWAIT); 394 if (m == NULL) 395 return (0); 396 l = mtod(m, struct llc *); 397 l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP; 398 l->llc_control = LLC_UI; 399 #ifdef ARGO_DEBUG 400 if (argo_debug[D_ETHER]) { 401 int i; 402 printf("unoutput: sending pkt to: "); 403 for (i=0; i<6; i++) 404 printf("%x ", edst[i] & 0xff); 405 printf("\n"); 406 } 407 #endif 408 } break; 409 #endif /* ISO */ 410 #ifdef LLC 411 /* case AF_NSAP: */ 412 case AF_CCITT: { 413 struct sockaddr_dl *sdl = 414 (struct sockaddr_dl *) rt -> rt_gateway; 415 416 if (sdl && sdl->sdl_family == AF_LINK 417 && sdl->sdl_alen > 0) { 418 bcopy(LLADDR(sdl), (char *)edst, 419 sizeof(edst)); 420 } else goto bad; /* Not a link interface ? Funny ... */ 421 if ((ifp->if_flags & IFF_SIMPLEX) && (*edst & 1) && 422 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 423 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 424 if (mcopy) { 425 eh = mtod(mcopy, struct ether_header *); 426 bcopy((caddr_t)edst, 427 (caddr_t)eh->ether_dhost, sizeof (edst)); 428 bcopy(LLADDR(ifp->if_sadl), 429 (caddr_t)eh->ether_shost, sizeof (edst)); 430 } 431 } 432 #ifdef LLC_DEBUG 433 { 434 int i; 435 struct llc *l = mtod(m, struct llc *); 436 437 printf("ether_output: sending LLC2 pkt to: "); 438 for (i=0; i<6; i++) 439 printf("%x ", edst[i] & 0xff); 440 printf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n", 441 m->m_pkthdr.len, l->llc_dsap & 0xff, l->llc_ssap &0xff, 442 l->llc_control & 0xff); 443 444 } 445 #endif /* LLC_DEBUG */ 446 } break; 447 #endif /* LLC */ 448 449 case pseudo_AF_HDRCMPLT: 450 hdrcmplt = 1; 451 eh = (struct ether_header *)dst->sa_data; 452 bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, sizeof (esrc)); 453 /* FALLTHROUGH */ 454 455 case AF_UNSPEC: 456 eh = (struct ether_header *)dst->sa_data; 457 bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, sizeof (edst)); 458 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 459 etype = eh->ether_type; 460 break; 461 462 default: 463 printf("%s: can't handle af%d\n", ifp->if_xname, 464 dst->sa_family); 465 senderr(EAFNOSUPPORT); 466 } 467 468 if (mcopy) 469 (void) looutput(ifp, mcopy, dst, rt); 470 471 /* If no ether type is set, this must be a 802.2 formatted packet. 472 */ 473 if (etype == 0) 474 etype = htons(m->m_pkthdr.len); 475 /* 476 * Add local net header. If no space in first mbuf, 477 * allocate another. 478 */ 479 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 480 if (m == 0) 481 senderr(ENOBUFS); 482 eh = mtod(m, struct ether_header *); 483 /* Note: etype is already in network byte order. */ 484 #ifdef __NO_STRICT_ALIGNMENT 485 eh->ether_type = etype; 486 #else 487 { 488 uint8_t *dstp = (uint8_t *) &eh->ether_type; 489 #if BYTE_ORDER == BIG_ENDIAN 490 dstp[0] = etype >> 8; 491 dstp[1] = etype; 492 #else 493 dstp[0] = etype; 494 dstp[1] = etype >> 8; 495 #endif /* BYTE_ORDER == BIG_ENDIAN */ 496 } 497 #endif /* __NO_STRICT_ALIGNMENT */ 498 bcopy((caddr_t)edst, (caddr_t)eh->ether_dhost, sizeof (edst)); 499 if (hdrcmplt) 500 bcopy((caddr_t)esrc, (caddr_t)eh->ether_shost, 501 sizeof(eh->ether_shost)); 502 else 503 bcopy(LLADDR(ifp->if_sadl), (caddr_t)eh->ether_shost, 504 sizeof(eh->ether_shost)); 505 506 #ifdef PFIL_HOOKS 507 if ((error = pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 508 return (error); 509 if (m == NULL) 510 return (0); 511 #endif 512 513 #if NBRIDGE > 0 514 /* 515 * Bridges require special output handling. 516 */ 517 if (ifp->if_bridge) 518 return (bridge_output(ifp, m, NULL, NULL)); 519 #endif 520 521 #ifdef ALTQ 522 /* 523 * If ALTQ is enabled on the parent interface, do 524 * classification; the queueing discipline might not 525 * require classification, but might require the 526 * address family/header pointer in the pktattr. 527 */ 528 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 529 altq_etherclassify(&ifp->if_snd, m, &pktattr); 530 #endif 531 532 mflags = m->m_flags; 533 len = m->m_pkthdr.len; 534 s = splnet(); 535 /* 536 * Queue message on interface, and start output if interface 537 * not yet active. 538 */ 539 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, error); 540 if (error) { 541 /* mbuf is already freed */ 542 splx(s); 543 return (error); 544 } 545 ifp->if_obytes += len; 546 if (mflags & M_MCAST) 547 ifp->if_omcasts++; 548 if ((ifp->if_flags & IFF_OACTIVE) == 0) 549 (*ifp->if_start)(ifp); 550 splx(s); 551 return (error); 552 553 bad: 554 if (m) 555 m_freem(m); 556 return (error); 557 } 558 559 #ifdef ALTQ 560 /* 561 * This routine is a slight hack to allow a packet to be classified 562 * if the Ethernet headers are present. It will go away when ALTQ's 563 * classification engine understands link headers. 564 */ 565 void 566 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m, 567 struct altq_pktattr *pktattr) 568 { 569 struct ether_header *eh; 570 u_int16_t ether_type; 571 int hlen, af, hdrsize; 572 caddr_t hdr; 573 574 hlen = ETHER_HDR_LEN; 575 eh = mtod(m, struct ether_header *); 576 577 ether_type = htons(eh->ether_type); 578 579 if (ether_type < ETHERMTU) { 580 /* LLC/SNAP */ 581 struct llc *llc = (struct llc *)(eh + 1); 582 hlen += 8; 583 584 if (m->m_len < hlen || 585 llc->llc_dsap != LLC_SNAP_LSAP || 586 llc->llc_ssap != LLC_SNAP_LSAP || 587 llc->llc_control != LLC_UI) { 588 /* Not SNAP. */ 589 goto bad; 590 } 591 592 ether_type = htons(llc->llc_un.type_snap.ether_type); 593 } 594 595 switch (ether_type) { 596 case ETHERTYPE_IP: 597 af = AF_INET; 598 hdrsize = 20; /* sizeof(struct ip) */ 599 break; 600 601 case ETHERTYPE_IPV6: 602 af = AF_INET6; 603 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 604 break; 605 606 default: 607 af = AF_UNSPEC; 608 hdrsize = 0; 609 break; 610 } 611 612 while (m->m_len <= hlen) { 613 hlen -= m->m_len; 614 m = m->m_next; 615 } 616 if (m->m_len < (hlen + hdrsize)) { 617 /* 618 * protocol header not in a single mbuf. 619 * We can't cope with this situation right 620 * now (but it shouldn't ever happen, really, anyhow). 621 */ 622 #ifdef DEBUG 623 printf("altq_etherclassify: headers span multiple mbufs: " 624 "%d < %d\n", m->m_len, (hlen + hdrsize)); 625 #endif 626 goto bad; 627 } 628 629 m->m_data += hlen; 630 m->m_len -= hlen; 631 632 hdr = mtod(m, caddr_t); 633 634 if (ALTQ_NEEDS_CLASSIFY(ifq)) 635 pktattr->pattr_class = 636 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 637 pktattr->pattr_af = af; 638 pktattr->pattr_hdr = hdr; 639 640 m->m_data -= hlen; 641 m->m_len += hlen; 642 643 return; 644 645 bad: 646 pktattr->pattr_class = NULL; 647 pktattr->pattr_hdr = NULL; 648 pktattr->pattr_af = AF_UNSPEC; 649 } 650 #endif /* ALTQ */ 651 652 /* 653 * Process a received Ethernet packet; 654 * the packet is in the mbuf chain m with 655 * the ether header. 656 */ 657 static void 658 ether_input(struct ifnet *ifp, struct mbuf *m) 659 { 660 struct ethercom *ec = (struct ethercom *) ifp; 661 struct ifqueue *inq; 662 u_int16_t etype; 663 int s; 664 struct ether_header *eh; 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 #ifdef MBUFTRACE 675 m_claimm(m, &ec->ec_rx_mowner); 676 #endif 677 eh = mtod(m, struct ether_header *); 678 etype = ntohs(eh->ether_type); 679 680 /* 681 * Determine if the packet is within its size limits. 682 */ 683 if (m->m_pkthdr.len > 684 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 685 printf("%s: discarding oversize frame (len=%d)\n", 686 ifp->if_xname, m->m_pkthdr.len); 687 m_freem(m); 688 return; 689 } 690 691 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 692 /* 693 * If this is not a simplex interface, drop the packet 694 * if it came from us. 695 */ 696 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 697 memcmp(LLADDR(ifp->if_sadl), eh->ether_shost, 698 ETHER_ADDR_LEN) == 0) { 699 m_freem(m); 700 return; 701 } 702 703 if (memcmp(etherbroadcastaddr, 704 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 705 m->m_flags |= M_BCAST; 706 else 707 m->m_flags |= M_MCAST; 708 ifp->if_imcasts++; 709 } 710 711 /* If the CRC is still on the packet, trim it off. */ 712 if (m->m_flags & M_HASFCS) { 713 m_adj(m, -ETHER_CRC_LEN); 714 m->m_flags &= ~M_HASFCS; 715 } 716 717 ifp->if_ibytes += m->m_pkthdr.len; 718 719 #if NBRIDGE > 0 720 /* 721 * Tap the packet off here for a bridge. bridge_input() 722 * will return NULL if it has consumed the packet, otherwise 723 * it gets processed as normal. Note that bridge_input() 724 * will always return the original packet if we need to 725 * process it locally. 726 */ 727 if (ifp->if_bridge) { 728 /* clear M_PROMISC, in case the packets comes from a vlan */ 729 m->m_flags &= ~M_PROMISC; 730 m = bridge_input(ifp, m); 731 if (m == NULL) 732 return; 733 734 /* 735 * Bridge has determined that the packet is for us. 736 * Update our interface pointer -- we may have had 737 * to "bridge" the packet locally. 738 */ 739 ifp = m->m_pkthdr.rcvif; 740 } else 741 #endif /* NBRIDGE > 0 */ 742 { 743 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0 && 744 (ifp->if_flags & IFF_PROMISC) != 0 && 745 memcmp(LLADDR(ifp->if_sadl), eh->ether_dhost, 746 ETHER_ADDR_LEN) != 0) { 747 m->m_flags |= M_PROMISC; 748 } 749 } 750 751 #ifdef PFIL_HOOKS 752 if ((m->m_flags & M_PROMISC) == 0) { 753 if (pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 754 return; 755 if (m == NULL) 756 return; 757 758 eh = mtod(m, struct ether_header *); 759 etype = ntohs(eh->ether_type); 760 } 761 #endif 762 763 /* 764 * If VLANs are configured on the interface, check to 765 * see if the device performed the decapsulation and 766 * provided us with the tag. 767 */ 768 if (ec->ec_nvlans && m_tag_find(m, PACKET_TAG_VLAN, NULL) != NULL) { 769 #if NVLAN > 0 770 /* 771 * vlan_input() will either recursively call ether_input() 772 * or drop the packet. 773 */ 774 vlan_input(ifp, m); 775 #else 776 m_freem(m); 777 #endif 778 return; 779 } 780 781 /* 782 * Handle protocols that expect to have the Ethernet header 783 * (and possibly FCS) intact. 784 */ 785 switch (etype) { 786 #if NVLAN > 0 787 case ETHERTYPE_VLAN: 788 /* 789 * vlan_input() will either recursively call ether_input() 790 * or drop the packet. 791 */ 792 if (((struct ethercom *)ifp)->ec_nvlans != 0) 793 vlan_input(ifp, m); 794 else 795 m_freem(m); 796 return; 797 #endif /* NVLAN > 0 */ 798 #if NPPPOE > 0 799 case ETHERTYPE_PPPOEDISC: 800 case ETHERTYPE_PPPOE: 801 if (m->m_flags & M_PROMISC) { 802 m_freem(m); 803 return; 804 } 805 #ifndef PPPOE_SERVER 806 if (m->m_flags & (M_MCAST | M_BCAST)) { 807 m_freem(m); 808 return; 809 } 810 #endif 811 812 if (etype == ETHERTYPE_PPPOEDISC) 813 inq = &ppoediscinq; 814 else 815 inq = &ppoeinq; 816 s = splnet(); 817 if (IF_QFULL(inq)) { 818 IF_DROP(inq); 819 m_freem(m); 820 } else 821 IF_ENQUEUE(inq, m); 822 splx(s); 823 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 824 if (!callout_pending(&pppoe_softintr)) 825 callout_reset(&pppoe_softintr, 1, pppoe_softintr_handler, NULL); 826 #else 827 softintr_schedule(pppoe_softintr); 828 #endif 829 return; 830 #endif /* NPPPOE > 0 */ 831 default: 832 if (m->m_flags & M_PROMISC) { 833 m_freem(m); 834 return; 835 } 836 } 837 838 /* Strip off the Ethernet header. */ 839 m_adj(m, sizeof(struct ether_header)); 840 841 /* If the CRC is still on the packet, trim it off. */ 842 if (m->m_flags & M_HASFCS) { 843 m_adj(m, -ETHER_CRC_LEN); 844 m->m_flags &= ~M_HASFCS; 845 } 846 847 switch (etype) { 848 #ifdef INET 849 case ETHERTYPE_IP: 850 #ifdef GATEWAY 851 if (ipflow_fastforward(m)) 852 return; 853 #endif 854 schednetisr(NETISR_IP); 855 inq = &ipintrq; 856 break; 857 858 case ETHERTYPE_ARP: 859 schednetisr(NETISR_ARP); 860 inq = &arpintrq; 861 break; 862 863 case ETHERTYPE_REVARP: 864 revarpinput(m); /* XXX queue? */ 865 return; 866 #endif 867 #ifdef INET6 868 case ETHERTYPE_IPV6: 869 schednetisr(NETISR_IPV6); 870 inq = &ip6intrq; 871 break; 872 #endif 873 #ifdef NS 874 case ETHERTYPE_NS: 875 schednetisr(NETISR_NS); 876 inq = &nsintrq; 877 break; 878 879 #endif 880 #ifdef IPX 881 case ETHERTYPE_IPX: 882 schednetisr(NETISR_IPX); 883 inq = &ipxintrq; 884 break; 885 #endif 886 #ifdef NETATALK 887 case ETHERTYPE_ATALK: 888 schednetisr(NETISR_ATALK); 889 inq = &atintrq1; 890 break; 891 case ETHERTYPE_AARP: 892 /* probably this should be done with a NETISR as well */ 893 aarpinput(ifp, m); /* XXX */ 894 return; 895 #endif /* NETATALK */ 896 default: 897 #if defined (ISO) || defined (LLC) || defined (NETATALK) 898 if (etype > ETHERMTU) 899 goto dropanyway; 900 l = mtod(m, struct llc *); 901 switch (l->llc_dsap) { 902 #ifdef NETATALK 903 case LLC_SNAP_LSAP: 904 switch (l->llc_control) { 905 case LLC_UI: 906 if (l->llc_ssap != LLC_SNAP_LSAP) { 907 goto dropanyway; 908 } 909 910 if (Bcmp(&(l->llc_snap_org_code)[0], 911 at_org_code, sizeof(at_org_code)) == 0 && 912 ntohs(l->llc_snap_ether_type) == 913 ETHERTYPE_ATALK) { 914 inq = &atintrq2; 915 m_adj(m, sizeof(struct llc)); 916 schednetisr(NETISR_ATALK); 917 break; 918 } 919 920 if (Bcmp(&(l->llc_snap_org_code)[0], 921 aarp_org_code, 922 sizeof(aarp_org_code)) == 0 && 923 ntohs(l->llc_snap_ether_type) == 924 ETHERTYPE_AARP) { 925 m_adj( m, sizeof(struct llc)); 926 aarpinput(ifp, m); /* XXX */ 927 return; 928 } 929 930 default: 931 goto dropanyway; 932 } 933 break; 934 #endif /* NETATALK */ 935 #ifdef ISO 936 case LLC_ISO_LSAP: 937 switch (l->llc_control) { 938 case LLC_UI: 939 /* LLC_UI_P forbidden in class 1 service */ 940 if ((l->llc_dsap == LLC_ISO_LSAP) && 941 (l->llc_ssap == LLC_ISO_LSAP)) { 942 /* LSAP for ISO */ 943 if (m->m_pkthdr.len > etype) 944 m_adj(m, etype - m->m_pkthdr.len); 945 m->m_data += 3; /* XXX */ 946 m->m_len -= 3; /* XXX */ 947 m->m_pkthdr.len -= 3; /* XXX */ 948 M_PREPEND(m, sizeof *eh, M_DONTWAIT); 949 if (m == 0) 950 return; 951 *mtod(m, struct ether_header *) = *eh; 952 #ifdef ARGO_DEBUG 953 if (argo_debug[D_ETHER]) 954 printf("clnp packet"); 955 #endif 956 schednetisr(NETISR_ISO); 957 inq = &clnlintrq; 958 break; 959 } 960 goto dropanyway; 961 962 case LLC_XID: 963 case LLC_XID_P: 964 if(m->m_len < 6) 965 goto dropanyway; 966 l->llc_window = 0; 967 l->llc_fid = 9; 968 l->llc_class = 1; 969 l->llc_dsap = l->llc_ssap = 0; 970 /* Fall through to */ 971 case LLC_TEST: 972 case LLC_TEST_P: 973 { 974 struct sockaddr sa; 975 struct ether_header *eh2; 976 int i; 977 u_char c = l->llc_dsap; 978 979 l->llc_dsap = l->llc_ssap; 980 l->llc_ssap = c; 981 if (m->m_flags & (M_BCAST | M_MCAST)) 982 bcopy(LLADDR(ifp->if_sadl), 983 (caddr_t)eh->ether_dhost, 6); 984 sa.sa_family = AF_UNSPEC; 985 sa.sa_len = sizeof(sa); 986 eh2 = (struct ether_header *)sa.sa_data; 987 for (i = 0; i < 6; i++) { 988 eh2->ether_shost[i] = c = 989 eh->ether_dhost[i]; 990 eh2->ether_dhost[i] = 991 eh->ether_dhost[i] = 992 eh->ether_shost[i]; 993 eh->ether_shost[i] = c; 994 } 995 ifp->if_output(ifp, m, &sa, NULL); 996 return; 997 } 998 default: 999 m_freem(m); 1000 return; 1001 } 1002 break; 1003 #endif /* ISO */ 1004 #ifdef LLC 1005 case LLC_X25_LSAP: 1006 { 1007 if (m->m_pkthdr.len > etype) 1008 m_adj(m, etype - m->m_pkthdr.len); 1009 M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT); 1010 if (m == 0) 1011 return; 1012 if ( !sdl_sethdrif(ifp, eh->ether_shost, LLC_X25_LSAP, 1013 eh->ether_dhost, LLC_X25_LSAP, 6, 1014 mtod(m, struct sdl_hdr *))) 1015 panic("ETHER cons addr failure"); 1016 mtod(m, struct sdl_hdr *)->sdlhdr_len = etype; 1017 #ifdef LLC_DEBUG 1018 printf("llc packet\n"); 1019 #endif /* LLC_DEBUG */ 1020 schednetisr(NETISR_CCITT); 1021 inq = &llcintrq; 1022 break; 1023 } 1024 #endif /* LLC */ 1025 dropanyway: 1026 default: 1027 m_freem(m); 1028 return; 1029 } 1030 #else /* ISO || LLC || NETATALK*/ 1031 m_freem(m); 1032 return; 1033 #endif /* ISO || LLC || NETATALK*/ 1034 } 1035 1036 s = splnet(); 1037 if (IF_QFULL(inq)) { 1038 IF_DROP(inq); 1039 m_freem(m); 1040 } else 1041 IF_ENQUEUE(inq, m); 1042 splx(s); 1043 } 1044 1045 /* 1046 * Convert Ethernet address to printable (loggable) representation. 1047 */ 1048 static char digits[] = "0123456789abcdef"; 1049 char * 1050 ether_sprintf(const u_char *ap) 1051 { 1052 static char etherbuf[18]; 1053 char *cp = etherbuf; 1054 int i; 1055 1056 for (i = 0; i < 6; i++) { 1057 *cp++ = digits[*ap >> 4]; 1058 *cp++ = digits[*ap++ & 0xf]; 1059 *cp++ = ':'; 1060 } 1061 *--cp = 0; 1062 return (etherbuf); 1063 } 1064 1065 /* 1066 * Perform common duties while attaching to interface list 1067 */ 1068 void 1069 ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 1070 { 1071 struct ethercom *ec = (struct ethercom *)ifp; 1072 1073 ifp->if_type = IFT_ETHER; 1074 ifp->if_addrlen = ETHER_ADDR_LEN; 1075 ifp->if_hdrlen = ETHER_HDR_LEN; 1076 ifp->if_dlt = DLT_EN10MB; 1077 ifp->if_mtu = ETHERMTU; 1078 ifp->if_output = ether_output; 1079 ifp->if_input = ether_input; 1080 if (ifp->if_baudrate == 0) 1081 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 1082 1083 if_alloc_sadl(ifp); 1084 memcpy(LLADDR(ifp->if_sadl), lla, ifp->if_addrlen); 1085 1086 LIST_INIT(&ec->ec_multiaddrs); 1087 ifp->if_broadcastaddr = etherbroadcastaddr; 1088 #if NBPFILTER > 0 1089 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 1090 #endif 1091 #ifdef MBUFTRACE 1092 strlcpy(ec->ec_tx_mowner.mo_name, ifp->if_xname, 1093 sizeof(ec->ec_tx_mowner.mo_name)); 1094 strlcpy(ec->ec_tx_mowner.mo_descr, "tx", 1095 sizeof(ec->ec_tx_mowner.mo_descr)); 1096 strlcpy(ec->ec_rx_mowner.mo_name, ifp->if_xname, 1097 sizeof(ec->ec_rx_mowner.mo_name)); 1098 strlcpy(ec->ec_rx_mowner.mo_descr, "rx", 1099 sizeof(ec->ec_rx_mowner.mo_descr)); 1100 MOWNER_ATTACH(&ec->ec_tx_mowner); 1101 MOWNER_ATTACH(&ec->ec_rx_mowner); 1102 ifp->if_mowner = &ec->ec_tx_mowner; 1103 #endif 1104 } 1105 1106 void 1107 ether_ifdetach(struct ifnet *ifp) 1108 { 1109 struct ethercom *ec = (void *) ifp; 1110 struct ether_multi *enm; 1111 int s; 1112 1113 #if NBRIDGE > 0 1114 if (ifp->if_bridge) 1115 bridge_ifdetach(ifp); 1116 #endif 1117 1118 #if NBPFILTER > 0 1119 bpfdetach(ifp); 1120 #endif 1121 1122 #if NVLAN > 0 1123 if (ec->ec_nvlans) 1124 vlan_ifdetach(ifp); 1125 #endif 1126 1127 s = splnet(); 1128 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1129 LIST_REMOVE(enm, enm_list); 1130 free(enm, M_IFMADDR); 1131 ec->ec_multicnt--; 1132 } 1133 splx(s); 1134 1135 #if 0 /* done in if_detach() */ 1136 if_free_sadl(ifp); 1137 #endif 1138 1139 MOWNER_DETACH(&ec->ec_rx_mowner); 1140 MOWNER_DETACH(&ec->ec_tx_mowner); 1141 } 1142 1143 #if 0 1144 /* 1145 * This is for reference. We have a table-driven version 1146 * of the little-endian crc32 generator, which is faster 1147 * than the double-loop. 1148 */ 1149 u_int32_t 1150 ether_crc32_le(const u_int8_t *buf, size_t len) 1151 { 1152 u_int32_t c, crc, carry; 1153 size_t i, j; 1154 1155 crc = 0xffffffffU; /* initial value */ 1156 1157 for (i = 0; i < len; i++) { 1158 c = buf[i]; 1159 for (j = 0; j < 8; j++) { 1160 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1161 crc >>= 1; 1162 c >>= 1; 1163 if (carry) 1164 crc = (crc ^ ETHER_CRC_POLY_LE); 1165 } 1166 } 1167 1168 return (crc); 1169 } 1170 #else 1171 u_int32_t 1172 ether_crc32_le(const u_int8_t *buf, size_t len) 1173 { 1174 static const u_int32_t crctab[] = { 1175 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1176 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1177 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1178 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1179 }; 1180 u_int32_t crc; 1181 size_t i; 1182 1183 crc = 0xffffffffU; /* initial value */ 1184 1185 for (i = 0; i < len; i++) { 1186 crc ^= buf[i]; 1187 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1188 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1189 } 1190 1191 return (crc); 1192 } 1193 #endif 1194 1195 u_int32_t 1196 ether_crc32_be(const u_int8_t *buf, size_t len) 1197 { 1198 u_int32_t c, crc, carry; 1199 size_t i, j; 1200 1201 crc = 0xffffffffU; /* initial value */ 1202 1203 for (i = 0; i < len; i++) { 1204 c = buf[i]; 1205 for (j = 0; j < 8; j++) { 1206 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1207 crc <<= 1; 1208 c >>= 1; 1209 if (carry) 1210 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1211 } 1212 } 1213 1214 return (crc); 1215 } 1216 1217 #ifdef INET 1218 u_char ether_ipmulticast_min[6] = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1219 u_char ether_ipmulticast_max[6] = { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1220 #endif 1221 #ifdef INET6 1222 u_char ether_ip6multicast_min[6] = { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1223 u_char ether_ip6multicast_max[6] = { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1224 #endif 1225 1226 /* 1227 * Convert a sockaddr into an Ethernet address or range of Ethernet 1228 * addresses. 1229 */ 1230 int 1231 ether_multiaddr(struct sockaddr *sa, u_int8_t addrlo[ETHER_ADDR_LEN], 1232 u_int8_t addrhi[ETHER_ADDR_LEN]) 1233 { 1234 #ifdef INET 1235 struct sockaddr_in *sin; 1236 #endif /* INET */ 1237 #ifdef INET6 1238 struct sockaddr_in6 *sin6; 1239 #endif /* INET6 */ 1240 1241 switch (sa->sa_family) { 1242 1243 case AF_UNSPEC: 1244 bcopy(sa->sa_data, addrlo, ETHER_ADDR_LEN); 1245 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1246 break; 1247 1248 #ifdef INET 1249 case AF_INET: 1250 sin = satosin(sa); 1251 if (sin->sin_addr.s_addr == INADDR_ANY) { 1252 /* 1253 * An IP address of INADDR_ANY means listen to 1254 * or stop listening to all of the Ethernet 1255 * multicast addresses used for IP. 1256 * (This is for the sake of IP multicast routers.) 1257 */ 1258 bcopy(ether_ipmulticast_min, addrlo, ETHER_ADDR_LEN); 1259 bcopy(ether_ipmulticast_max, addrhi, ETHER_ADDR_LEN); 1260 } 1261 else { 1262 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1263 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1264 } 1265 break; 1266 #endif 1267 #ifdef INET6 1268 case AF_INET6: 1269 sin6 = satosin6(sa); 1270 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1271 /* 1272 * An IP6 address of 0 means listen to or stop 1273 * listening to all of the Ethernet multicast 1274 * address used for IP6. 1275 * (This is used for multicast routers.) 1276 */ 1277 bcopy(ether_ip6multicast_min, addrlo, ETHER_ADDR_LEN); 1278 bcopy(ether_ip6multicast_max, addrhi, ETHER_ADDR_LEN); 1279 } else { 1280 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1281 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1282 } 1283 break; 1284 #endif 1285 1286 default: 1287 return (EAFNOSUPPORT); 1288 } 1289 return (0); 1290 } 1291 1292 /* 1293 * Add an Ethernet multicast address or range of addresses to the list for a 1294 * given interface. 1295 */ 1296 int 1297 ether_addmulti(struct ifreq *ifr, struct ethercom *ec) 1298 { 1299 struct ether_multi *enm; 1300 u_char addrlo[ETHER_ADDR_LEN]; 1301 u_char addrhi[ETHER_ADDR_LEN]; 1302 int s = splnet(), error; 1303 1304 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1305 if (error != 0) { 1306 splx(s); 1307 return (error); 1308 } 1309 1310 /* 1311 * Verify that we have valid Ethernet multicast addresses. 1312 */ 1313 if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) { 1314 splx(s); 1315 return (EINVAL); 1316 } 1317 /* 1318 * See if the address range is already in the list. 1319 */ 1320 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1321 if (enm != NULL) { 1322 /* 1323 * Found it; just increment the reference count. 1324 */ 1325 ++enm->enm_refcount; 1326 splx(s); 1327 return (0); 1328 } 1329 /* 1330 * New address or range; malloc a new multicast record 1331 * and link it into the interface's multicast list. 1332 */ 1333 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1334 if (enm == NULL) { 1335 splx(s); 1336 return (ENOBUFS); 1337 } 1338 bcopy(addrlo, enm->enm_addrlo, 6); 1339 bcopy(addrhi, enm->enm_addrhi, 6); 1340 enm->enm_ec = ec; 1341 enm->enm_refcount = 1; 1342 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1343 ec->ec_multicnt++; 1344 splx(s); 1345 /* 1346 * Return ENETRESET to inform the driver that the list has changed 1347 * and its reception filter should be adjusted accordingly. 1348 */ 1349 return (ENETRESET); 1350 } 1351 1352 /* 1353 * Delete a multicast address record. 1354 */ 1355 int 1356 ether_delmulti(struct ifreq *ifr, struct ethercom *ec) 1357 { 1358 struct ether_multi *enm; 1359 u_char addrlo[ETHER_ADDR_LEN]; 1360 u_char addrhi[ETHER_ADDR_LEN]; 1361 int s = splnet(), error; 1362 1363 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1364 if (error != 0) { 1365 splx(s); 1366 return (error); 1367 } 1368 1369 /* 1370 * Look ur the address in our list. 1371 */ 1372 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1373 if (enm == NULL) { 1374 splx(s); 1375 return (ENXIO); 1376 } 1377 if (--enm->enm_refcount != 0) { 1378 /* 1379 * Still some claims to this record. 1380 */ 1381 splx(s); 1382 return (0); 1383 } 1384 /* 1385 * No remaining claims to this record; unlink and free it. 1386 */ 1387 LIST_REMOVE(enm, enm_list); 1388 free(enm, M_IFMADDR); 1389 ec->ec_multicnt--; 1390 splx(s); 1391 /* 1392 * Return ENETRESET to inform the driver that the list has changed 1393 * and its reception filter should be adjusted accordingly. 1394 */ 1395 return (ENETRESET); 1396 } 1397 1398 /* 1399 * Common ioctls for Ethernet interfaces. Note, we must be 1400 * called at splnet(). 1401 */ 1402 int 1403 ether_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1404 { 1405 struct ethercom *ec = (void *) ifp; 1406 struct ifreq *ifr = (struct ifreq *)data; 1407 struct ifaddr *ifa = (struct ifaddr *)data; 1408 int error = 0; 1409 1410 switch (cmd) { 1411 case SIOCSIFADDR: 1412 ifp->if_flags |= IFF_UP; 1413 switch (ifa->ifa_addr->sa_family) { 1414 case AF_LINK: 1415 { 1416 struct sockaddr_dl *sdl = 1417 (struct sockaddr_dl *) ifa->ifa_addr; 1418 1419 if (sdl->sdl_type != IFT_ETHER || 1420 sdl->sdl_alen != ifp->if_addrlen) { 1421 error = EINVAL; 1422 break; 1423 } 1424 1425 memcpy(LLADDR(ifp->if_sadl), LLADDR(sdl), 1426 ifp->if_addrlen); 1427 1428 /* Set new address. */ 1429 error = (*ifp->if_init)(ifp); 1430 break; 1431 } 1432 #ifdef INET 1433 case AF_INET: 1434 if ((ifp->if_flags & IFF_RUNNING) == 0 && 1435 (error = (*ifp->if_init)(ifp)) != 0) 1436 break; 1437 arp_ifinit(ifp, ifa); 1438 break; 1439 #endif /* INET */ 1440 #ifdef NS 1441 case AF_NS: 1442 { 1443 struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; 1444 1445 if (ns_nullhost(*ina)) 1446 ina->x_host = *(union ns_host *) 1447 LLADDR(ifp->if_sadl); 1448 else 1449 memcpy(LLADDR(ifp->if_sadl), 1450 ina->x_host.c_host, ifp->if_addrlen); 1451 /* Set new address. */ 1452 error = (*ifp->if_init)(ifp); 1453 break; 1454 } 1455 #endif /* NS */ 1456 default: 1457 if ((ifp->if_flags & IFF_RUNNING) == 0) 1458 error = (*ifp->if_init)(ifp); 1459 break; 1460 } 1461 break; 1462 1463 case SIOCGIFADDR: 1464 memcpy(((struct sockaddr *)&ifr->ifr_data)->sa_data, 1465 LLADDR(ifp->if_sadl), ETHER_ADDR_LEN); 1466 break; 1467 1468 case SIOCSIFMTU: 1469 { 1470 int maxmtu; 1471 1472 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1473 maxmtu = ETHERMTU_JUMBO; 1474 else 1475 maxmtu = ETHERMTU; 1476 1477 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1478 error = EINVAL; 1479 else { 1480 ifp->if_mtu = ifr->ifr_mtu; 1481 1482 /* Make sure the device notices the MTU change. */ 1483 if (ifp->if_flags & IFF_UP) 1484 error = (*ifp->if_init)(ifp); 1485 } 1486 break; 1487 } 1488 1489 case SIOCSIFFLAGS: 1490 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_RUNNING) { 1491 /* 1492 * If interface is marked down and it is running, 1493 * then stop and disable it. 1494 */ 1495 (*ifp->if_stop)(ifp, 1); 1496 } else if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_UP) { 1497 /* 1498 * If interface is marked up and it is stopped, then 1499 * start it. 1500 */ 1501 error = (*ifp->if_init)(ifp); 1502 } else if ((ifp->if_flags & IFF_UP) != 0) { 1503 /* 1504 * Reset the interface to pick up changes in any other 1505 * flags that affect the hardware state. 1506 */ 1507 error = (*ifp->if_init)(ifp); 1508 } 1509 break; 1510 1511 case SIOCADDMULTI: 1512 error = ether_addmulti(ifr, ec); 1513 break; 1514 1515 case SIOCDELMULTI: 1516 error = ether_delmulti(ifr, ec); 1517 break; 1518 1519 default: 1520 error = ENOTTY; 1521 } 1522 1523 return (error); 1524 }
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