if_ethersubr.c revision 1.121
1 /* $NetBSD: if_ethersubr.c,v 1.121 2005/03/18 11:11:50 yamt 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 1.121 2005/03/18 11:11:50 yamt 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 #include "agr.h" 82 83 #include <sys/param.h> 84 #include <sys/systm.h> 85 #include <sys/kernel.h> 86 #include <sys/callout.h> 87 #include <sys/malloc.h> 88 #include <sys/mbuf.h> 89 #include <sys/protosw.h> 90 #include <sys/socket.h> 91 #include <sys/ioctl.h> 92 #include <sys/errno.h> 93 #include <sys/syslog.h> 94 95 #include <machine/cpu.h> 96 97 #include <net/if.h> 98 #include <net/netisr.h> 99 #include <net/route.h> 100 #include <net/if_llc.h> 101 #include <net/if_dl.h> 102 #include <net/if_types.h> 103 104 #if NARP == 0 105 /* 106 * XXX there should really be a way to issue this warning from within config(8) 107 */ 108 #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. 109 #endif 110 111 #if NBPFILTER > 0 112 #include <net/bpf.h> 113 #endif 114 115 #include <net/if_ether.h> 116 #if NVLAN > 0 117 #include <net/if_vlanvar.h> 118 #endif 119 120 #if NPPPOE > 0 121 #include <net/if_pppoe.h> 122 #endif 123 124 #if NAGR > 0 125 #include <net/agr/ieee8023_slowprotocols.h> /* XXX */ 126 #include <net/agr/ieee8023ad.h> 127 #include <net/agr/if_agrvar.h> 128 #endif 129 130 #if NBRIDGE > 0 131 #include <net/if_bridgevar.h> 132 #endif 133 134 #include <netinet/in.h> 135 #ifdef INET 136 #include <netinet/in_var.h> 137 #endif 138 #include <netinet/if_inarp.h> 139 140 #ifdef INET6 141 #ifndef INET 142 #include <netinet/in.h> 143 #endif 144 #include <netinet6/in6_var.h> 145 #include <netinet6/nd6.h> 146 #endif 147 148 #ifdef NS 149 #include <netns/ns.h> 150 #include <netns/ns_if.h> 151 #endif 152 153 #ifdef IPX 154 #include <netipx/ipx.h> 155 #include <netipx/ipx_if.h> 156 #endif 157 158 #ifdef ISO 159 #include <netiso/argo_debug.h> 160 #include <netiso/iso.h> 161 #include <netiso/iso_var.h> 162 #include <netiso/iso_snpac.h> 163 #endif 164 165 #ifdef LLC 166 #include <netccitt/dll.h> 167 #include <netccitt/llc_var.h> 168 #endif 169 170 #if defined(LLC) && defined(CCITT) 171 extern struct ifqueue pkintrq; 172 #endif 173 174 #ifdef NETATALK 175 #include <netatalk/at.h> 176 #include <netatalk/at_var.h> 177 #include <netatalk/at_extern.h> 178 179 #define llc_snap_org_code llc_un.type_snap.org_code 180 #define llc_snap_ether_type llc_un.type_snap.ether_type 181 182 extern u_char at_org_code[3]; 183 extern u_char aarp_org_code[3]; 184 #endif /* NETATALK */ 185 186 const uint8_t etherbroadcastaddr[ETHER_ADDR_LEN] = 187 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 188 const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] = 189 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 }; 190 #define senderr(e) { error = (e); goto bad;} 191 192 #define SIN(x) ((struct sockaddr_in *)x) 193 194 static int ether_output __P((struct ifnet *, struct mbuf *, 195 struct sockaddr *, struct rtentry *)); 196 static void ether_input __P((struct ifnet *, struct mbuf *)); 197 198 /* 199 * Ethernet output routine. 200 * Encapsulate a packet of type family for the local net. 201 * Assumes that ifp is actually pointer to ethercom structure. 202 */ 203 static int 204 ether_output(struct ifnet *ifp, struct mbuf *m0, struct sockaddr *dst, 205 struct rtentry *rt0) 206 { 207 u_int16_t etype = 0; 208 int s, len, error = 0, hdrcmplt = 0; 209 u_char esrc[6], edst[6]; 210 struct mbuf *m = m0; 211 struct rtentry *rt; 212 struct mbuf *mcopy = (struct mbuf *)0; 213 struct ether_header *eh; 214 ALTQ_DECL(struct altq_pktattr pktattr;) 215 #ifdef INET 216 struct arphdr *ah; 217 #endif /* INET */ 218 #ifdef NETATALK 219 struct at_ifaddr *aa; 220 #endif /* NETATALK */ 221 short mflags; 222 223 #ifdef MBUFTRACE 224 m_claimm(m, ifp->if_mowner); 225 #endif 226 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 227 senderr(ENETDOWN); 228 if ((rt = rt0) != NULL) { 229 if ((rt->rt_flags & RTF_UP) == 0) { 230 if ((rt0 = rt = rtalloc1(dst, 1)) != NULL) { 231 rt->rt_refcnt--; 232 if (rt->rt_ifp != ifp) 233 return (*rt->rt_ifp->if_output) 234 (ifp, m0, dst, rt); 235 } else 236 senderr(EHOSTUNREACH); 237 } 238 if ((rt->rt_flags & RTF_GATEWAY) && dst->sa_family != AF_NS) { 239 if (rt->rt_gwroute == 0) 240 goto lookup; 241 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 242 rtfree(rt); rt = rt0; 243 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1); 244 if ((rt = rt->rt_gwroute) == 0) 245 senderr(EHOSTUNREACH); 246 /* the "G" test below also prevents rt == rt0 */ 247 if ((rt->rt_flags & RTF_GATEWAY) || 248 (rt->rt_ifp != ifp)) { 249 rt->rt_refcnt--; 250 rt0->rt_gwroute = 0; 251 senderr(EHOSTUNREACH); 252 } 253 } 254 } 255 if (rt->rt_flags & RTF_REJECT) 256 if (rt->rt_rmx.rmx_expire == 0 || 257 (u_long) time.tv_sec < rt->rt_rmx.rmx_expire) 258 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 259 } 260 261 switch (dst->sa_family) { 262 263 #ifdef INET 264 case AF_INET: 265 if (m->m_flags & M_BCAST) 266 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 267 sizeof(edst)); 268 269 else if (m->m_flags & M_MCAST) { 270 ETHER_MAP_IP_MULTICAST(&SIN(dst)->sin_addr, 271 (caddr_t)edst) 272 273 } else if (!arpresolve(ifp, rt, m, dst, edst)) 274 return (0); /* if not yet resolved */ 275 /* If broadcasting on a simplex interface, loopback a copy */ 276 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 277 mcopy = m_copy(m, 0, (int)M_COPYALL); 278 etype = htons(ETHERTYPE_IP); 279 break; 280 281 case AF_ARP: 282 ah = mtod(m, struct arphdr *); 283 if (m->m_flags & M_BCAST) 284 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 285 sizeof(edst)); 286 else 287 bcopy((caddr_t)ar_tha(ah), 288 (caddr_t)edst, sizeof(edst)); 289 290 ah->ar_hrd = htons(ARPHRD_ETHER); 291 292 switch (ntohs(ah->ar_op)) { 293 case ARPOP_REVREQUEST: 294 case ARPOP_REVREPLY: 295 etype = htons(ETHERTYPE_REVARP); 296 break; 297 298 case ARPOP_REQUEST: 299 case ARPOP_REPLY: 300 default: 301 etype = htons(ETHERTYPE_ARP); 302 } 303 304 break; 305 #endif 306 #ifdef INET6 307 case AF_INET6: 308 if (!nd6_storelladdr(ifp, rt, m, dst, (u_char *)edst)){ 309 /* something bad happened */ 310 return (0); 311 } 312 etype = htons(ETHERTYPE_IPV6); 313 break; 314 #endif 315 #ifdef NETATALK 316 case AF_APPLETALK: 317 if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) { 318 #ifdef NETATALKDEBUG 319 printf("aarpresolv failed\n"); 320 #endif /* NETATALKDEBUG */ 321 return (0); 322 } 323 /* 324 * ifaddr is the first thing in at_ifaddr 325 */ 326 aa = (struct at_ifaddr *) at_ifawithnet( 327 (struct sockaddr_at *)dst, ifp); 328 if (aa == NULL) 329 goto bad; 330 331 /* 332 * In the phase 2 case, we need to prepend an mbuf for the 333 * llc header. Since we must preserve the value of m, 334 * which is passed to us by value, we m_copy() the first 335 * mbuf, and use it for our llc header. 336 */ 337 if (aa->aa_flags & AFA_PHASE2) { 338 struct llc llc; 339 340 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 341 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 342 llc.llc_control = LLC_UI; 343 bcopy(at_org_code, llc.llc_snap_org_code, 344 sizeof(llc.llc_snap_org_code)); 345 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 346 bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc)); 347 } else { 348 etype = htons(ETHERTYPE_ATALK); 349 } 350 break; 351 #endif /* NETATALK */ 352 #ifdef NS 353 case AF_NS: 354 etype = htons(ETHERTYPE_NS); 355 bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host), 356 (caddr_t)edst, sizeof (edst)); 357 if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst))) 358 return (looutput(ifp, m, dst, rt)); 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 IPX 365 case AF_IPX: 366 etype = htons(ETHERTYPE_IPX); 367 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 368 (caddr_t)edst, sizeof (edst)); 369 /* If broadcasting on a simplex interface, loopback a copy */ 370 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 371 mcopy = m_copy(m, 0, (int)M_COPYALL); 372 break; 373 #endif 374 #ifdef ISO 375 case AF_ISO: { 376 int snpalen; 377 struct llc *l; 378 struct sockaddr_dl *sdl; 379 380 if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) && 381 sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) { 382 bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst)); 383 } else { 384 error = iso_snparesolve(ifp, (struct sockaddr_iso *)dst, 385 (char *)edst, &snpalen); 386 if (error) 387 goto bad; /* Not Resolved */ 388 } 389 /* If broadcasting on a simplex interface, loopback a copy */ 390 if (*edst & 1) 391 m->m_flags |= (M_BCAST|M_MCAST); 392 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) && 393 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 394 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 395 if (mcopy) { 396 eh = mtod(mcopy, struct ether_header *); 397 bcopy((caddr_t)edst, 398 (caddr_t)eh->ether_dhost, sizeof (edst)); 399 bcopy(LLADDR(ifp->if_sadl), 400 (caddr_t)eh->ether_shost, sizeof (edst)); 401 } 402 } 403 M_PREPEND(m, 3, M_DONTWAIT); 404 if (m == NULL) 405 return (0); 406 l = mtod(m, struct llc *); 407 l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP; 408 l->llc_control = LLC_UI; 409 #ifdef ARGO_DEBUG 410 if (argo_debug[D_ETHER]) { 411 int i; 412 printf("unoutput: sending pkt to: "); 413 for (i=0; i<6; i++) 414 printf("%x ", edst[i] & 0xff); 415 printf("\n"); 416 } 417 #endif 418 } break; 419 #endif /* ISO */ 420 #ifdef LLC 421 /* case AF_NSAP: */ 422 case AF_CCITT: { 423 struct sockaddr_dl *sdl = 424 (struct sockaddr_dl *) rt -> rt_gateway; 425 426 if (sdl && sdl->sdl_family == AF_LINK 427 && sdl->sdl_alen > 0) { 428 bcopy(LLADDR(sdl), (char *)edst, 429 sizeof(edst)); 430 } else goto bad; /* Not a link interface ? Funny ... */ 431 if ((ifp->if_flags & IFF_SIMPLEX) && (*edst & 1) && 432 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 433 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 434 if (mcopy) { 435 eh = mtod(mcopy, struct ether_header *); 436 bcopy((caddr_t)edst, 437 (caddr_t)eh->ether_dhost, sizeof (edst)); 438 bcopy(LLADDR(ifp->if_sadl), 439 (caddr_t)eh->ether_shost, sizeof (edst)); 440 } 441 } 442 #ifdef LLC_DEBUG 443 { 444 int i; 445 struct llc *l = mtod(m, struct llc *); 446 447 printf("ether_output: sending LLC2 pkt to: "); 448 for (i=0; i<6; i++) 449 printf("%x ", edst[i] & 0xff); 450 printf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n", 451 m->m_pkthdr.len, l->llc_dsap & 0xff, l->llc_ssap &0xff, 452 l->llc_control & 0xff); 453 454 } 455 #endif /* LLC_DEBUG */ 456 } break; 457 #endif /* LLC */ 458 459 case pseudo_AF_HDRCMPLT: 460 hdrcmplt = 1; 461 eh = (struct ether_header *)dst->sa_data; 462 bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, sizeof (esrc)); 463 /* FALLTHROUGH */ 464 465 case AF_UNSPEC: 466 eh = (struct ether_header *)dst->sa_data; 467 bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, sizeof (edst)); 468 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 469 etype = eh->ether_type; 470 break; 471 472 default: 473 printf("%s: can't handle af%d\n", ifp->if_xname, 474 dst->sa_family); 475 senderr(EAFNOSUPPORT); 476 } 477 478 if (mcopy) 479 (void) looutput(ifp, mcopy, dst, rt); 480 481 /* If no ether type is set, this must be a 802.2 formatted packet. 482 */ 483 if (etype == 0) 484 etype = htons(m->m_pkthdr.len); 485 /* 486 * Add local net header. If no space in first mbuf, 487 * allocate another. 488 */ 489 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 490 if (m == 0) 491 senderr(ENOBUFS); 492 eh = mtod(m, struct ether_header *); 493 /* Note: etype is already in network byte order. */ 494 #ifdef __NO_STRICT_ALIGNMENT 495 eh->ether_type = etype; 496 #else 497 { 498 uint8_t *dstp = (uint8_t *) &eh->ether_type; 499 #if BYTE_ORDER == BIG_ENDIAN 500 dstp[0] = etype >> 8; 501 dstp[1] = etype; 502 #else 503 dstp[0] = etype; 504 dstp[1] = etype >> 8; 505 #endif /* BYTE_ORDER == BIG_ENDIAN */ 506 } 507 #endif /* __NO_STRICT_ALIGNMENT */ 508 bcopy((caddr_t)edst, (caddr_t)eh->ether_dhost, sizeof (edst)); 509 if (hdrcmplt) 510 bcopy((caddr_t)esrc, (caddr_t)eh->ether_shost, 511 sizeof(eh->ether_shost)); 512 else 513 bcopy(LLADDR(ifp->if_sadl), (caddr_t)eh->ether_shost, 514 sizeof(eh->ether_shost)); 515 516 #ifdef PFIL_HOOKS 517 if ((error = pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 518 return (error); 519 if (m == NULL) 520 return (0); 521 #endif 522 523 #if NBRIDGE > 0 524 /* 525 * Bridges require special output handling. 526 */ 527 if (ifp->if_bridge) 528 return (bridge_output(ifp, m, NULL, NULL)); 529 #endif 530 531 #ifdef ALTQ 532 /* 533 * If ALTQ is enabled on the parent interface, do 534 * classification; the queueing discipline might not 535 * require classification, but might require the 536 * address family/header pointer in the pktattr. 537 */ 538 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 539 altq_etherclassify(&ifp->if_snd, m, &pktattr); 540 #endif 541 542 mflags = m->m_flags; 543 len = m->m_pkthdr.len; 544 s = splnet(); 545 /* 546 * Queue message on interface, and start output if interface 547 * not yet active. 548 */ 549 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, error); 550 if (error) { 551 /* mbuf is already freed */ 552 splx(s); 553 return (error); 554 } 555 ifp->if_obytes += len; 556 if (mflags & M_MCAST) 557 ifp->if_omcasts++; 558 if ((ifp->if_flags & IFF_OACTIVE) == 0) 559 (*ifp->if_start)(ifp); 560 splx(s); 561 return (error); 562 563 bad: 564 if (m) 565 m_freem(m); 566 return (error); 567 } 568 569 #ifdef ALTQ 570 /* 571 * This routine is a slight hack to allow a packet to be classified 572 * if the Ethernet headers are present. It will go away when ALTQ's 573 * classification engine understands link headers. 574 */ 575 void 576 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m, 577 struct altq_pktattr *pktattr) 578 { 579 struct ether_header *eh; 580 u_int16_t ether_type; 581 int hlen, af, hdrsize; 582 caddr_t hdr; 583 584 hlen = ETHER_HDR_LEN; 585 eh = mtod(m, struct ether_header *); 586 587 ether_type = htons(eh->ether_type); 588 589 if (ether_type < ETHERMTU) { 590 /* LLC/SNAP */ 591 struct llc *llc = (struct llc *)(eh + 1); 592 hlen += 8; 593 594 if (m->m_len < hlen || 595 llc->llc_dsap != LLC_SNAP_LSAP || 596 llc->llc_ssap != LLC_SNAP_LSAP || 597 llc->llc_control != LLC_UI) { 598 /* Not SNAP. */ 599 goto bad; 600 } 601 602 ether_type = htons(llc->llc_un.type_snap.ether_type); 603 } 604 605 switch (ether_type) { 606 case ETHERTYPE_IP: 607 af = AF_INET; 608 hdrsize = 20; /* sizeof(struct ip) */ 609 break; 610 611 case ETHERTYPE_IPV6: 612 af = AF_INET6; 613 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 614 break; 615 616 default: 617 af = AF_UNSPEC; 618 hdrsize = 0; 619 break; 620 } 621 622 while (m->m_len <= hlen) { 623 hlen -= m->m_len; 624 m = m->m_next; 625 } 626 if (m->m_len < (hlen + hdrsize)) { 627 /* 628 * protocol header not in a single mbuf. 629 * We can't cope with this situation right 630 * now (but it shouldn't ever happen, really, anyhow). 631 */ 632 #ifdef DEBUG 633 printf("altq_etherclassify: headers span multiple mbufs: " 634 "%d < %d\n", m->m_len, (hlen + hdrsize)); 635 #endif 636 goto bad; 637 } 638 639 m->m_data += hlen; 640 m->m_len -= hlen; 641 642 hdr = mtod(m, caddr_t); 643 644 if (ALTQ_NEEDS_CLASSIFY(ifq)) 645 pktattr->pattr_class = 646 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 647 pktattr->pattr_af = af; 648 pktattr->pattr_hdr = hdr; 649 650 m->m_data -= hlen; 651 m->m_len += hlen; 652 653 return; 654 655 bad: 656 pktattr->pattr_class = NULL; 657 pktattr->pattr_hdr = NULL; 658 pktattr->pattr_af = AF_UNSPEC; 659 } 660 #endif /* ALTQ */ 661 662 /* 663 * Process a received Ethernet packet; 664 * the packet is in the mbuf chain m with 665 * the ether header. 666 */ 667 static void 668 ether_input(struct ifnet *ifp, struct mbuf *m) 669 { 670 struct ethercom *ec = (struct ethercom *) ifp; 671 struct ifqueue *inq; 672 u_int16_t etype; 673 int s; 674 struct ether_header *eh; 675 #if defined (ISO) || defined (LLC) || defined(NETATALK) 676 struct llc *l; 677 #endif 678 679 if ((ifp->if_flags & IFF_UP) == 0) { 680 m_freem(m); 681 return; 682 } 683 684 #ifdef MBUFTRACE 685 m_claimm(m, &ec->ec_rx_mowner); 686 #endif 687 eh = mtod(m, struct ether_header *); 688 etype = ntohs(eh->ether_type); 689 690 /* 691 * Determine if the packet is within its size limits. 692 */ 693 if (m->m_pkthdr.len > 694 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 695 printf("%s: discarding oversize frame (len=%d)\n", 696 ifp->if_xname, m->m_pkthdr.len); 697 m_freem(m); 698 return; 699 } 700 701 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 702 /* 703 * If this is not a simplex interface, drop the packet 704 * if it came from us. 705 */ 706 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 707 memcmp(LLADDR(ifp->if_sadl), eh->ether_shost, 708 ETHER_ADDR_LEN) == 0) { 709 m_freem(m); 710 return; 711 } 712 713 if (memcmp(etherbroadcastaddr, 714 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 715 m->m_flags |= M_BCAST; 716 else 717 m->m_flags |= M_MCAST; 718 ifp->if_imcasts++; 719 } 720 721 /* If the CRC is still on the packet, trim it off. */ 722 if (m->m_flags & M_HASFCS) { 723 m_adj(m, -ETHER_CRC_LEN); 724 m->m_flags &= ~M_HASFCS; 725 } 726 727 ifp->if_ibytes += m->m_pkthdr.len; 728 729 #if NBRIDGE > 0 730 /* 731 * Tap the packet off here for a bridge. bridge_input() 732 * will return NULL if it has consumed the packet, otherwise 733 * it gets processed as normal. Note that bridge_input() 734 * will always return the original packet if we need to 735 * process it locally. 736 */ 737 if (ifp->if_bridge) { 738 if(m->m_flags & M_PROTO1) { 739 m->m_flags &= ~M_PROTO1; 740 } else { 741 /* clear M_PROMISC, in case the packets comes from a vlan */ 742 m->m_flags &= ~M_PROMISC; 743 m = bridge_input(ifp, m); 744 if (m == NULL) 745 return; 746 747 /* 748 * Bridge has determined that the packet is for us. 749 * Update our interface pointer -- we may have had 750 * to "bridge" the packet locally. 751 */ 752 ifp = m->m_pkthdr.rcvif; 753 } 754 } else 755 #endif /* NBRIDGE > 0 */ 756 { 757 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0 && 758 (ifp->if_flags & IFF_PROMISC) != 0 && 759 memcmp(LLADDR(ifp->if_sadl), eh->ether_dhost, 760 ETHER_ADDR_LEN) != 0) { 761 m->m_flags |= M_PROMISC; 762 } 763 } 764 765 #ifdef PFIL_HOOKS 766 if ((m->m_flags & M_PROMISC) == 0) { 767 if (pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 768 return; 769 if (m == NULL) 770 return; 771 772 eh = mtod(m, struct ether_header *); 773 etype = ntohs(eh->ether_type); 774 } 775 #endif 776 777 /* 778 * If VLANs are configured on the interface, check to 779 * see if the device performed the decapsulation and 780 * provided us with the tag. 781 */ 782 if (ec->ec_nvlans && m_tag_find(m, PACKET_TAG_VLAN, NULL) != NULL) { 783 #if NVLAN > 0 784 /* 785 * vlan_input() will either recursively call ether_input() 786 * or drop the packet. 787 */ 788 vlan_input(ifp, m); 789 #else 790 m_freem(m); 791 #endif 792 return; 793 } 794 795 #if NAGR > 0 796 if (ifp->if_agrprivate && 797 __predict_true(etype != ETHERTYPE_SLOWPROTOCOLS)) { 798 m->m_flags &= ~M_PROMISC; 799 agr_input(ifp, m); 800 return; 801 } 802 #endif /* NAGR > 0 */ 803 804 /* 805 * Handle protocols that expect to have the Ethernet header 806 * (and possibly FCS) intact. 807 */ 808 switch (etype) { 809 #if NVLAN > 0 810 case ETHERTYPE_VLAN: 811 /* 812 * vlan_input() will either recursively call ether_input() 813 * or drop the packet. 814 */ 815 if (((struct ethercom *)ifp)->ec_nvlans != 0) 816 vlan_input(ifp, m); 817 else 818 m_freem(m); 819 return; 820 #endif /* NVLAN > 0 */ 821 #if NPPPOE > 0 822 case ETHERTYPE_PPPOEDISC: 823 case ETHERTYPE_PPPOE: 824 if (m->m_flags & M_PROMISC) { 825 m_freem(m); 826 return; 827 } 828 #ifndef PPPOE_SERVER 829 if (m->m_flags & (M_MCAST | M_BCAST)) { 830 m_freem(m); 831 return; 832 } 833 #endif 834 835 if (etype == ETHERTYPE_PPPOEDISC) 836 inq = &ppoediscinq; 837 else 838 inq = &ppoeinq; 839 s = splnet(); 840 if (IF_QFULL(inq)) { 841 IF_DROP(inq); 842 m_freem(m); 843 } else 844 IF_ENQUEUE(inq, m); 845 splx(s); 846 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 847 if (!callout_pending(&pppoe_softintr)) 848 callout_reset(&pppoe_softintr, 1, pppoe_softintr_handler, NULL); 849 #else 850 softintr_schedule(pppoe_softintr); 851 #endif 852 return; 853 #endif /* NPPPOE > 0 */ 854 case ETHERTYPE_SLOWPROTOCOLS: { 855 uint8_t subtype; 856 857 #if defined(DIAGNOSTIC) 858 if (m->m_pkthdr.len < sizeof(*eh) + sizeof(subtype)) { 859 panic("ether_input: too short slow protocol packet"); 860 } 861 #endif 862 m_copydata(m, sizeof(*eh), sizeof(subtype), &subtype); 863 switch (subtype) { 864 #if NAGR > 0 865 case SLOWPROTOCOLS_SUBTYPE_LACP: 866 if (ifp->if_agrprivate) { 867 ieee8023ad_lacp_input(ifp, m); 868 return; 869 } 870 break; 871 872 case SLOWPROTOCOLS_SUBTYPE_MARKER: 873 if (ifp->if_agrprivate) { 874 ieee8023ad_marker_input(ifp, m); 875 return; 876 } 877 break; 878 #endif /* NAGR > 0 */ 879 default: 880 if (subtype == 0 || subtype > 10) { 881 /* illegal value */ 882 m_freem(m); 883 return; 884 } 885 /* unknown subtype */ 886 break; 887 } 888 /* FALLTHROUGH */ 889 } 890 default: 891 if (m->m_flags & M_PROMISC) { 892 m_freem(m); 893 return; 894 } 895 } 896 897 /* Strip off the Ethernet header. */ 898 m_adj(m, sizeof(struct ether_header)); 899 900 /* If the CRC is still on the packet, trim it off. */ 901 if (m->m_flags & M_HASFCS) { 902 m_adj(m, -ETHER_CRC_LEN); 903 m->m_flags &= ~M_HASFCS; 904 } 905 906 switch (etype) { 907 #ifdef INET 908 case ETHERTYPE_IP: 909 #ifdef GATEWAY 910 if (ipflow_fastforward(m)) 911 return; 912 #endif 913 schednetisr(NETISR_IP); 914 inq = &ipintrq; 915 break; 916 917 case ETHERTYPE_ARP: 918 schednetisr(NETISR_ARP); 919 inq = &arpintrq; 920 break; 921 922 case ETHERTYPE_REVARP: 923 revarpinput(m); /* XXX queue? */ 924 return; 925 #endif 926 #ifdef INET6 927 case ETHERTYPE_IPV6: 928 schednetisr(NETISR_IPV6); 929 inq = &ip6intrq; 930 break; 931 #endif 932 #ifdef NS 933 case ETHERTYPE_NS: 934 schednetisr(NETISR_NS); 935 inq = &nsintrq; 936 break; 937 938 #endif 939 #ifdef IPX 940 case ETHERTYPE_IPX: 941 schednetisr(NETISR_IPX); 942 inq = &ipxintrq; 943 break; 944 #endif 945 #ifdef NETATALK 946 case ETHERTYPE_ATALK: 947 schednetisr(NETISR_ATALK); 948 inq = &atintrq1; 949 break; 950 case ETHERTYPE_AARP: 951 /* probably this should be done with a NETISR as well */ 952 aarpinput(ifp, m); /* XXX */ 953 return; 954 #endif /* NETATALK */ 955 default: 956 #if defined (ISO) || defined (LLC) || defined (NETATALK) 957 if (etype > ETHERMTU) 958 goto dropanyway; 959 l = mtod(m, struct llc *); 960 switch (l->llc_dsap) { 961 #ifdef NETATALK 962 case LLC_SNAP_LSAP: 963 switch (l->llc_control) { 964 case LLC_UI: 965 if (l->llc_ssap != LLC_SNAP_LSAP) { 966 goto dropanyway; 967 } 968 969 if (Bcmp(&(l->llc_snap_org_code)[0], 970 at_org_code, sizeof(at_org_code)) == 0 && 971 ntohs(l->llc_snap_ether_type) == 972 ETHERTYPE_ATALK) { 973 inq = &atintrq2; 974 m_adj(m, sizeof(struct llc)); 975 schednetisr(NETISR_ATALK); 976 break; 977 } 978 979 if (Bcmp(&(l->llc_snap_org_code)[0], 980 aarp_org_code, 981 sizeof(aarp_org_code)) == 0 && 982 ntohs(l->llc_snap_ether_type) == 983 ETHERTYPE_AARP) { 984 m_adj( m, sizeof(struct llc)); 985 aarpinput(ifp, m); /* XXX */ 986 return; 987 } 988 989 default: 990 goto dropanyway; 991 } 992 break; 993 #endif /* NETATALK */ 994 #ifdef ISO 995 case LLC_ISO_LSAP: 996 switch (l->llc_control) { 997 case LLC_UI: 998 /* LLC_UI_P forbidden in class 1 service */ 999 if ((l->llc_dsap == LLC_ISO_LSAP) && 1000 (l->llc_ssap == LLC_ISO_LSAP)) { 1001 /* LSAP for ISO */ 1002 if (m->m_pkthdr.len > etype) 1003 m_adj(m, etype - m->m_pkthdr.len); 1004 m->m_data += 3; /* XXX */ 1005 m->m_len -= 3; /* XXX */ 1006 m->m_pkthdr.len -= 3; /* XXX */ 1007 M_PREPEND(m, sizeof *eh, M_DONTWAIT); 1008 if (m == 0) 1009 return; 1010 *mtod(m, struct ether_header *) = *eh; 1011 #ifdef ARGO_DEBUG 1012 if (argo_debug[D_ETHER]) 1013 printf("clnp packet"); 1014 #endif 1015 schednetisr(NETISR_ISO); 1016 inq = &clnlintrq; 1017 break; 1018 } 1019 goto dropanyway; 1020 1021 case LLC_XID: 1022 case LLC_XID_P: 1023 if(m->m_len < 6) 1024 goto dropanyway; 1025 l->llc_window = 0; 1026 l->llc_fid = 9; 1027 l->llc_class = 1; 1028 l->llc_dsap = l->llc_ssap = 0; 1029 /* Fall through to */ 1030 case LLC_TEST: 1031 case LLC_TEST_P: 1032 { 1033 struct sockaddr sa; 1034 struct ether_header *eh2; 1035 int i; 1036 u_char c = l->llc_dsap; 1037 1038 l->llc_dsap = l->llc_ssap; 1039 l->llc_ssap = c; 1040 if (m->m_flags & (M_BCAST | M_MCAST)) 1041 bcopy(LLADDR(ifp->if_sadl), 1042 (caddr_t)eh->ether_dhost, 6); 1043 sa.sa_family = AF_UNSPEC; 1044 sa.sa_len = sizeof(sa); 1045 eh2 = (struct ether_header *)sa.sa_data; 1046 for (i = 0; i < 6; i++) { 1047 eh2->ether_shost[i] = c = 1048 eh->ether_dhost[i]; 1049 eh2->ether_dhost[i] = 1050 eh->ether_dhost[i] = 1051 eh->ether_shost[i]; 1052 eh->ether_shost[i] = c; 1053 } 1054 ifp->if_output(ifp, m, &sa, NULL); 1055 return; 1056 } 1057 default: 1058 m_freem(m); 1059 return; 1060 } 1061 break; 1062 #endif /* ISO */ 1063 #ifdef LLC 1064 case LLC_X25_LSAP: 1065 { 1066 if (m->m_pkthdr.len > etype) 1067 m_adj(m, etype - m->m_pkthdr.len); 1068 M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT); 1069 if (m == 0) 1070 return; 1071 if ( !sdl_sethdrif(ifp, eh->ether_shost, LLC_X25_LSAP, 1072 eh->ether_dhost, LLC_X25_LSAP, 6, 1073 mtod(m, struct sdl_hdr *))) 1074 panic("ETHER cons addr failure"); 1075 mtod(m, struct sdl_hdr *)->sdlhdr_len = etype; 1076 #ifdef LLC_DEBUG 1077 printf("llc packet\n"); 1078 #endif /* LLC_DEBUG */ 1079 schednetisr(NETISR_CCITT); 1080 inq = &llcintrq; 1081 break; 1082 } 1083 #endif /* LLC */ 1084 dropanyway: 1085 default: 1086 m_freem(m); 1087 return; 1088 } 1089 #else /* ISO || LLC || NETATALK*/ 1090 m_freem(m); 1091 return; 1092 #endif /* ISO || LLC || NETATALK*/ 1093 } 1094 1095 s = splnet(); 1096 if (IF_QFULL(inq)) { 1097 IF_DROP(inq); 1098 m_freem(m); 1099 } else 1100 IF_ENQUEUE(inq, m); 1101 splx(s); 1102 } 1103 1104 /* 1105 * Convert Ethernet address to printable (loggable) representation. 1106 */ 1107 static char digits[] = "0123456789abcdef"; 1108 char * 1109 ether_sprintf(const u_char *ap) 1110 { 1111 static char etherbuf[18]; 1112 char *cp = etherbuf; 1113 int i; 1114 1115 for (i = 0; i < 6; i++) { 1116 *cp++ = digits[*ap >> 4]; 1117 *cp++ = digits[*ap++ & 0xf]; 1118 *cp++ = ':'; 1119 } 1120 *--cp = 0; 1121 return (etherbuf); 1122 } 1123 1124 /* 1125 * Perform common duties while attaching to interface list 1126 */ 1127 void 1128 ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 1129 { 1130 struct ethercom *ec = (struct ethercom *)ifp; 1131 1132 ifp->if_type = IFT_ETHER; 1133 ifp->if_addrlen = ETHER_ADDR_LEN; 1134 ifp->if_hdrlen = ETHER_HDR_LEN; 1135 ifp->if_dlt = DLT_EN10MB; 1136 ifp->if_mtu = ETHERMTU; 1137 ifp->if_output = ether_output; 1138 ifp->if_input = ether_input; 1139 if (ifp->if_baudrate == 0) 1140 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 1141 1142 if_alloc_sadl(ifp); 1143 memcpy(LLADDR(ifp->if_sadl), lla, ifp->if_addrlen); 1144 1145 LIST_INIT(&ec->ec_multiaddrs); 1146 ifp->if_broadcastaddr = etherbroadcastaddr; 1147 #if NBPFILTER > 0 1148 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 1149 #endif 1150 #ifdef MBUFTRACE 1151 strlcpy(ec->ec_tx_mowner.mo_name, ifp->if_xname, 1152 sizeof(ec->ec_tx_mowner.mo_name)); 1153 strlcpy(ec->ec_tx_mowner.mo_descr, "tx", 1154 sizeof(ec->ec_tx_mowner.mo_descr)); 1155 strlcpy(ec->ec_rx_mowner.mo_name, ifp->if_xname, 1156 sizeof(ec->ec_rx_mowner.mo_name)); 1157 strlcpy(ec->ec_rx_mowner.mo_descr, "rx", 1158 sizeof(ec->ec_rx_mowner.mo_descr)); 1159 MOWNER_ATTACH(&ec->ec_tx_mowner); 1160 MOWNER_ATTACH(&ec->ec_rx_mowner); 1161 ifp->if_mowner = &ec->ec_tx_mowner; 1162 #endif 1163 } 1164 1165 void 1166 ether_ifdetach(struct ifnet *ifp) 1167 { 1168 struct ethercom *ec = (void *) ifp; 1169 struct ether_multi *enm; 1170 int s; 1171 1172 #if NBRIDGE > 0 1173 if (ifp->if_bridge) 1174 bridge_ifdetach(ifp); 1175 #endif 1176 1177 #if NBPFILTER > 0 1178 bpfdetach(ifp); 1179 #endif 1180 1181 #if NVLAN > 0 1182 if (ec->ec_nvlans) 1183 vlan_ifdetach(ifp); 1184 #endif 1185 1186 s = splnet(); 1187 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1188 LIST_REMOVE(enm, enm_list); 1189 free(enm, M_IFMADDR); 1190 ec->ec_multicnt--; 1191 } 1192 splx(s); 1193 1194 #if 0 /* done in if_detach() */ 1195 if_free_sadl(ifp); 1196 #endif 1197 1198 MOWNER_DETACH(&ec->ec_rx_mowner); 1199 MOWNER_DETACH(&ec->ec_tx_mowner); 1200 } 1201 1202 #if 0 1203 /* 1204 * This is for reference. We have a table-driven version 1205 * of the little-endian crc32 generator, which is faster 1206 * than the double-loop. 1207 */ 1208 u_int32_t 1209 ether_crc32_le(const u_int8_t *buf, size_t len) 1210 { 1211 u_int32_t c, crc, carry; 1212 size_t i, j; 1213 1214 crc = 0xffffffffU; /* initial value */ 1215 1216 for (i = 0; i < len; i++) { 1217 c = buf[i]; 1218 for (j = 0; j < 8; j++) { 1219 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1220 crc >>= 1; 1221 c >>= 1; 1222 if (carry) 1223 crc = (crc ^ ETHER_CRC_POLY_LE); 1224 } 1225 } 1226 1227 return (crc); 1228 } 1229 #else 1230 u_int32_t 1231 ether_crc32_le(const u_int8_t *buf, size_t len) 1232 { 1233 static const u_int32_t crctab[] = { 1234 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1235 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1236 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1237 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1238 }; 1239 u_int32_t crc; 1240 size_t i; 1241 1242 crc = 0xffffffffU; /* initial value */ 1243 1244 for (i = 0; i < len; i++) { 1245 crc ^= buf[i]; 1246 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1247 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1248 } 1249 1250 return (crc); 1251 } 1252 #endif 1253 1254 u_int32_t 1255 ether_crc32_be(const u_int8_t *buf, size_t len) 1256 { 1257 u_int32_t c, crc, carry; 1258 size_t i, j; 1259 1260 crc = 0xffffffffU; /* initial value */ 1261 1262 for (i = 0; i < len; i++) { 1263 c = buf[i]; 1264 for (j = 0; j < 8; j++) { 1265 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1266 crc <<= 1; 1267 c >>= 1; 1268 if (carry) 1269 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1270 } 1271 } 1272 1273 return (crc); 1274 } 1275 1276 #ifdef INET 1277 const uint8_t ether_ipmulticast_min[ETHER_ADDR_LEN] = 1278 { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1279 const uint8_t ether_ipmulticast_max[ETHER_ADDR_LEN] = 1280 { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1281 #endif 1282 #ifdef INET6 1283 const uint8_t ether_ip6multicast_min[ETHER_ADDR_LEN] = 1284 { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1285 const uint8_t ether_ip6multicast_max[ETHER_ADDR_LEN] = 1286 { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1287 #endif 1288 1289 /* 1290 * Convert a sockaddr into an Ethernet address or range of Ethernet 1291 * addresses. 1292 */ 1293 int 1294 ether_multiaddr(struct sockaddr *sa, u_int8_t addrlo[ETHER_ADDR_LEN], 1295 u_int8_t addrhi[ETHER_ADDR_LEN]) 1296 { 1297 #ifdef INET 1298 struct sockaddr_in *sin; 1299 #endif /* INET */ 1300 #ifdef INET6 1301 struct sockaddr_in6 *sin6; 1302 #endif /* INET6 */ 1303 1304 switch (sa->sa_family) { 1305 1306 case AF_UNSPEC: 1307 bcopy(sa->sa_data, addrlo, ETHER_ADDR_LEN); 1308 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1309 break; 1310 1311 #ifdef INET 1312 case AF_INET: 1313 sin = satosin(sa); 1314 if (sin->sin_addr.s_addr == INADDR_ANY) { 1315 /* 1316 * An IP address of INADDR_ANY means listen to 1317 * or stop listening to all of the Ethernet 1318 * multicast addresses used for IP. 1319 * (This is for the sake of IP multicast routers.) 1320 */ 1321 bcopy(ether_ipmulticast_min, addrlo, ETHER_ADDR_LEN); 1322 bcopy(ether_ipmulticast_max, addrhi, ETHER_ADDR_LEN); 1323 } 1324 else { 1325 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1326 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1327 } 1328 break; 1329 #endif 1330 #ifdef INET6 1331 case AF_INET6: 1332 sin6 = satosin6(sa); 1333 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1334 /* 1335 * An IP6 address of 0 means listen to or stop 1336 * listening to all of the Ethernet multicast 1337 * address used for IP6. 1338 * (This is used for multicast routers.) 1339 */ 1340 bcopy(ether_ip6multicast_min, addrlo, ETHER_ADDR_LEN); 1341 bcopy(ether_ip6multicast_max, addrhi, ETHER_ADDR_LEN); 1342 } else { 1343 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1344 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1345 } 1346 break; 1347 #endif 1348 1349 default: 1350 return (EAFNOSUPPORT); 1351 } 1352 return (0); 1353 } 1354 1355 /* 1356 * Add an Ethernet multicast address or range of addresses to the list for a 1357 * given interface. 1358 */ 1359 int 1360 ether_addmulti(struct ifreq *ifr, struct ethercom *ec) 1361 { 1362 struct ether_multi *enm; 1363 u_char addrlo[ETHER_ADDR_LEN]; 1364 u_char addrhi[ETHER_ADDR_LEN]; 1365 int s = splnet(), error; 1366 1367 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1368 if (error != 0) { 1369 splx(s); 1370 return (error); 1371 } 1372 1373 /* 1374 * Verify that we have valid Ethernet multicast addresses. 1375 */ 1376 if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) { 1377 splx(s); 1378 return (EINVAL); 1379 } 1380 /* 1381 * See if the address range is already in the list. 1382 */ 1383 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1384 if (enm != NULL) { 1385 /* 1386 * Found it; just increment the reference count. 1387 */ 1388 ++enm->enm_refcount; 1389 splx(s); 1390 return (0); 1391 } 1392 /* 1393 * New address or range; malloc a new multicast record 1394 * and link it into the interface's multicast list. 1395 */ 1396 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1397 if (enm == NULL) { 1398 splx(s); 1399 return (ENOBUFS); 1400 } 1401 bcopy(addrlo, enm->enm_addrlo, 6); 1402 bcopy(addrhi, enm->enm_addrhi, 6); 1403 enm->enm_refcount = 1; 1404 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1405 ec->ec_multicnt++; 1406 splx(s); 1407 /* 1408 * Return ENETRESET to inform the driver that the list has changed 1409 * and its reception filter should be adjusted accordingly. 1410 */ 1411 return (ENETRESET); 1412 } 1413 1414 /* 1415 * Delete a multicast address record. 1416 */ 1417 int 1418 ether_delmulti(struct ifreq *ifr, struct ethercom *ec) 1419 { 1420 struct ether_multi *enm; 1421 u_char addrlo[ETHER_ADDR_LEN]; 1422 u_char addrhi[ETHER_ADDR_LEN]; 1423 int s = splnet(), error; 1424 1425 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1426 if (error != 0) { 1427 splx(s); 1428 return (error); 1429 } 1430 1431 /* 1432 * Look ur the address in our list. 1433 */ 1434 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1435 if (enm == NULL) { 1436 splx(s); 1437 return (ENXIO); 1438 } 1439 if (--enm->enm_refcount != 0) { 1440 /* 1441 * Still some claims to this record. 1442 */ 1443 splx(s); 1444 return (0); 1445 } 1446 /* 1447 * No remaining claims to this record; unlink and free it. 1448 */ 1449 LIST_REMOVE(enm, enm_list); 1450 free(enm, M_IFMADDR); 1451 ec->ec_multicnt--; 1452 splx(s); 1453 /* 1454 * Return ENETRESET to inform the driver that the list has changed 1455 * and its reception filter should be adjusted accordingly. 1456 */ 1457 return (ENETRESET); 1458 } 1459 1460 /* 1461 * Common ioctls for Ethernet interfaces. Note, we must be 1462 * called at splnet(). 1463 */ 1464 int 1465 ether_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1466 { 1467 struct ethercom *ec = (void *) ifp; 1468 struct ifreq *ifr = (struct ifreq *)data; 1469 struct ifaddr *ifa = (struct ifaddr *)data; 1470 int error = 0; 1471 1472 switch (cmd) { 1473 case SIOCSIFADDR: 1474 ifp->if_flags |= IFF_UP; 1475 switch (ifa->ifa_addr->sa_family) { 1476 case AF_LINK: 1477 { 1478 struct sockaddr_dl *sdl = 1479 (struct sockaddr_dl *) ifa->ifa_addr; 1480 1481 if (sdl->sdl_type != IFT_ETHER || 1482 sdl->sdl_alen != ifp->if_addrlen) { 1483 error = EINVAL; 1484 break; 1485 } 1486 1487 memcpy(LLADDR(ifp->if_sadl), LLADDR(sdl), 1488 ifp->if_addrlen); 1489 1490 /* Set new address. */ 1491 error = (*ifp->if_init)(ifp); 1492 break; 1493 } 1494 #ifdef INET 1495 case AF_INET: 1496 if ((ifp->if_flags & IFF_RUNNING) == 0 && 1497 (error = (*ifp->if_init)(ifp)) != 0) 1498 break; 1499 arp_ifinit(ifp, ifa); 1500 break; 1501 #endif /* INET */ 1502 #ifdef NS 1503 case AF_NS: 1504 { 1505 struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; 1506 1507 if (ns_nullhost(*ina)) 1508 ina->x_host = *(union ns_host *) 1509 LLADDR(ifp->if_sadl); 1510 else 1511 memcpy(LLADDR(ifp->if_sadl), 1512 ina->x_host.c_host, ifp->if_addrlen); 1513 /* Set new address. */ 1514 error = (*ifp->if_init)(ifp); 1515 break; 1516 } 1517 #endif /* NS */ 1518 default: 1519 if ((ifp->if_flags & IFF_RUNNING) == 0) 1520 error = (*ifp->if_init)(ifp); 1521 break; 1522 } 1523 break; 1524 1525 case SIOCGIFADDR: 1526 memcpy(((struct sockaddr *)&ifr->ifr_data)->sa_data, 1527 LLADDR(ifp->if_sadl), ETHER_ADDR_LEN); 1528 break; 1529 1530 case SIOCSIFMTU: 1531 { 1532 int maxmtu; 1533 1534 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1535 maxmtu = ETHERMTU_JUMBO; 1536 else 1537 maxmtu = ETHERMTU; 1538 1539 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1540 error = EINVAL; 1541 else { 1542 ifp->if_mtu = ifr->ifr_mtu; 1543 1544 /* Make sure the device notices the MTU change. */ 1545 if (ifp->if_flags & IFF_UP) 1546 error = (*ifp->if_init)(ifp); 1547 } 1548 break; 1549 } 1550 1551 case SIOCSIFFLAGS: 1552 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_RUNNING) { 1553 /* 1554 * If interface is marked down and it is running, 1555 * then stop and disable it. 1556 */ 1557 (*ifp->if_stop)(ifp, 1); 1558 } else if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_UP) { 1559 /* 1560 * If interface is marked up and it is stopped, then 1561 * start it. 1562 */ 1563 error = (*ifp->if_init)(ifp); 1564 } else if ((ifp->if_flags & IFF_UP) != 0) { 1565 /* 1566 * Reset the interface to pick up changes in any other 1567 * flags that affect the hardware state. 1568 */ 1569 error = (*ifp->if_init)(ifp); 1570 } 1571 break; 1572 1573 case SIOCADDMULTI: 1574 error = ether_addmulti(ifr, ec); 1575 break; 1576 1577 case SIOCDELMULTI: 1578 error = ether_delmulti(ifr, ec); 1579 break; 1580 1581 default: 1582 error = ENOTTY; 1583 } 1584 1585 return (error); 1586 } 1587
Indexes created Wed Sep 24 05:09:52 GMT 2025