if_ethersubr.c revision 1.41.6.2
1 /* $NetBSD: if_ethersubr.c,v 1.41.6.2 1999/11/30 13:35:02 itojun 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 "opt_inet.h" 68 #include "opt_atalk.h" 69 #include "opt_ccitt.h" 70 #include "opt_llc.h" 71 #include "opt_iso.h" 72 #include "opt_ns.h" 73 #include "opt_gateway.h" 74 75 #include <sys/param.h> 76 #include <sys/systm.h> 77 #include <sys/kernel.h> 78 #include <sys/malloc.h> 79 #include <sys/mbuf.h> 80 #include <sys/protosw.h> 81 #include <sys/socket.h> 82 #include <sys/ioctl.h> 83 #include <sys/errno.h> 84 #include <sys/syslog.h> 85 86 #include <machine/cpu.h> 87 88 #include <net/if.h> 89 #include <net/netisr.h> 90 #include <net/route.h> 91 #include <net/if_llc.h> 92 #include <net/if_dl.h> 93 #include <net/if_types.h> 94 95 #include <net/if_ether.h> 96 97 #include <netinet/in.h> 98 #ifdef INET 99 #include <netinet/in_var.h> 100 #endif 101 #include <netinet/if_inarp.h> 102 103 #ifdef INET6 104 #ifndef INET 105 #include <netinet/in.h> 106 #endif 107 #include <netinet6/in6_var.h> 108 #include <netinet6/nd6.h> 109 #include <netinet6/in6_ifattach.h> 110 #endif 111 112 #ifdef NS 113 #include <netns/ns.h> 114 #include <netns/ns_if.h> 115 #endif 116 117 #ifdef IPX 118 #include <netipx/ipx.h> 119 #include <netipx/ipx_if.h> 120 #endif 121 122 #ifdef ISO 123 #include <netiso/argo_debug.h> 124 #include <netiso/iso.h> 125 #include <netiso/iso_var.h> 126 #include <netiso/iso_snpac.h> 127 #endif 128 129 #ifdef LLC 130 #include <netccitt/dll.h> 131 #include <netccitt/llc_var.h> 132 #endif 133 134 #if defined(LLC) && defined(CCITT) 135 extern struct ifqueue pkintrq; 136 #endif 137 138 #ifdef NETATALK 139 #include <netatalk/at.h> 140 #include <netatalk/at_var.h> 141 #include <netatalk/at_extern.h> 142 143 #define llc_snap_org_code llc_un.type_snap.org_code 144 #define llc_snap_ether_type llc_un.type_snap.ether_type 145 146 extern u_char at_org_code[3]; 147 extern u_char aarp_org_code[3]; 148 #endif /* NETATALK */ 149 150 u_char etherbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 151 #define senderr(e) { error = (e); goto bad;} 152 153 #define SIN(x) ((struct sockaddr_in *)x) 154 155 /* 156 * Ethernet output routine. 157 * Encapsulate a packet of type family for the local net. 158 * Assumes that ifp is actually pointer to ethercom structure. 159 */ 160 int 161 ether_output(ifp, m0, dst, rt0) 162 struct ifnet *ifp; 163 struct mbuf *m0; 164 struct sockaddr *dst; 165 struct rtentry *rt0; 166 { 167 u_int16_t etype; 168 int s, error = 0, hdrcmplt = 0; 169 u_char esrc[6], edst[6]; 170 struct mbuf *m = m0; 171 struct rtentry *rt; 172 struct mbuf *mcopy = (struct mbuf *)0; 173 struct ether_header *eh; 174 #ifdef INET 175 struct arphdr *ah; 176 #endif /* INET */ 177 #ifdef NETATALK 178 struct at_ifaddr *aa; 179 #endif /* NETATALK */ 180 #ifdef ALTQ 181 struct pr_hdr pr_hdr; 182 #endif 183 184 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 185 senderr(ENETDOWN); 186 ifp->if_lastchange = time; 187 if ((rt = rt0) != NULL) { 188 if ((rt->rt_flags & RTF_UP) == 0) { 189 if ((rt0 = rt = rtalloc1(dst, 1)) != NULL) { 190 rt->rt_refcnt--; 191 if (rt->rt_ifp != ifp) 192 return (*rt->rt_ifp->if_output) 193 (ifp, m0, dst, rt); 194 } else 195 senderr(EHOSTUNREACH); 196 } 197 if ((rt->rt_flags & RTF_GATEWAY) && dst->sa_family != AF_NS) { 198 if (rt->rt_gwroute == 0) 199 goto lookup; 200 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 201 rtfree(rt); rt = rt0; 202 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1); 203 if ((rt = rt->rt_gwroute) == 0) 204 senderr(EHOSTUNREACH); 205 /* the "G" test below also prevents rt == rt0 */ 206 if ((rt->rt_flags & RTF_GATEWAY) || 207 (rt->rt_ifp != ifp)) { 208 rt->rt_refcnt--; 209 rt0->rt_gwroute = 0; 210 senderr(EHOSTUNREACH); 211 } 212 } 213 } 214 if (rt->rt_flags & RTF_REJECT) 215 if (rt->rt_rmx.rmx_expire == 0 || 216 time.tv_sec < rt->rt_rmx.rmx_expire) 217 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 218 } 219 #ifdef ALTQ 220 /* 221 * save a pointer to the protocol level header before adding 222 * link headers. 223 */ 224 pr_hdr.ph_family = dst->sa_family; 225 pr_hdr.ph_hdr = mtod(m, caddr_t); 226 #endif /* ALTQ */ 227 switch (dst->sa_family) { 228 229 #ifdef INET 230 case AF_INET: 231 if (m->m_flags & M_BCAST) 232 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 233 sizeof(edst)); 234 235 else if (m->m_flags & M_MCAST) { 236 ETHER_MAP_IP_MULTICAST(&SIN(dst)->sin_addr, 237 (caddr_t)edst) 238 239 } else if (!arpresolve(ifp, rt, m, dst, edst)) 240 return (0); /* if not yet resolved */ 241 /* If broadcasting on a simplex interface, loopback a copy */ 242 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 243 mcopy = m_copy(m, 0, (int)M_COPYALL); 244 etype = htons(ETHERTYPE_IP); 245 break; 246 247 case AF_ARP: 248 ah = mtod(m, struct arphdr *); 249 if (m->m_flags & M_BCAST) 250 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 251 sizeof(edst)); 252 else 253 bcopy((caddr_t)ar_tha(ah), 254 (caddr_t)edst, sizeof(edst)); 255 256 ah->ar_hrd = htons(ARPHRD_ETHER); 257 258 switch(ntohs(ah->ar_op)) { 259 case ARPOP_REVREQUEST: 260 case ARPOP_REVREPLY: 261 etype = htons(ETHERTYPE_REVARP); 262 break; 263 264 case ARPOP_REQUEST: 265 case ARPOP_REPLY: 266 default: 267 etype = htons(ETHERTYPE_ARP); 268 } 269 270 break; 271 #endif 272 #ifdef INET6 273 case AF_INET6: 274 #ifdef OLDIP6OUTPUT 275 if (!nd6_resolve(ifp, rt, m, dst, (u_char *)edst)) 276 return(0); /* if not yet resolves */ 277 #else 278 if (!nd6_storelladdr(ifp, rt, m, dst, (u_char *)edst)){ 279 /* this must be impossible, so we bark */ 280 printf("nd6_storelladdr failed\n"); 281 return(0); 282 } 283 #endif /* OLDIP6OUTPUT */ 284 etype = htons(ETHERTYPE_IPV6); 285 break; 286 #endif 287 #ifdef NETATALK 288 case AF_APPLETALK: 289 if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) { 290 #ifdef NETATALKDEBUG 291 printf("aarpresolv failed\n"); 292 #endif /* NETATALKDEBUG */ 293 return (0); 294 } 295 /* 296 * ifaddr is the first thing in at_ifaddr 297 */ 298 aa = (struct at_ifaddr *) at_ifawithnet( 299 (struct sockaddr_at *)dst, ifp); 300 if (aa == NULL) 301 goto bad; 302 303 /* 304 * In the phase 2 case, we need to prepend an mbuf for the 305 * llc header. Since we must preserve the value of m, 306 * which is passed to us by value, we m_copy() the first 307 * mbuf, and use it for our llc header. 308 */ 309 if (aa->aa_flags & AFA_PHASE2) { 310 struct llc llc; 311 312 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 313 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 314 llc.llc_control = LLC_UI; 315 bcopy(at_org_code, llc.llc_snap_org_code, 316 sizeof(llc.llc_snap_org_code)); 317 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 318 bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc)); 319 etype = htons(m->m_pkthdr.len); 320 } else { 321 etype = htons(ETHERTYPE_ATALK); 322 } 323 break; 324 #endif /* NETATALK */ 325 #ifdef NS 326 case AF_NS: 327 etype = htons(ETHERTYPE_NS); 328 bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host), 329 (caddr_t)edst, sizeof (edst)); 330 if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst))) 331 return (looutput(ifp, m, dst, rt)); 332 /* If broadcasting on a simplex interface, loopback a copy */ 333 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 334 mcopy = m_copy(m, 0, (int)M_COPYALL); 335 break; 336 #endif 337 #ifdef IPX 338 case AF_IPX: 339 etype = htons(ETHERTYPE_IPX); 340 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 341 (caddr_t)edst, sizeof (edst)); 342 /* If broadcasting on a simplex interface, loopback a copy */ 343 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 344 mcopy = m_copy(m, 0, (int)M_COPYALL); 345 break; 346 #endif 347 #ifdef ISO 348 case AF_ISO: { 349 int snpalen; 350 struct llc *l; 351 struct sockaddr_dl *sdl; 352 353 if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) && 354 sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) { 355 bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst)); 356 } else { 357 error = iso_snparesolve(ifp, (struct sockaddr_iso *)dst, 358 (char *)edst, &snpalen); 359 if (error) 360 goto bad; /* Not Resolved */ 361 } 362 /* If broadcasting on a simplex interface, loopback a copy */ 363 if (*edst & 1) 364 m->m_flags |= (M_BCAST|M_MCAST); 365 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) && 366 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 367 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 368 if (mcopy) { 369 eh = mtod(mcopy, struct ether_header *); 370 bcopy((caddr_t)edst, 371 (caddr_t)eh->ether_dhost, sizeof (edst)); 372 bcopy(LLADDR(ifp->if_sadl), 373 (caddr_t)eh->ether_shost, sizeof (edst)); 374 } 375 } 376 M_PREPEND(m, 3, M_DONTWAIT); 377 if (m == NULL) 378 return (0); 379 etype = htons(m->m_pkthdr.len); 380 l = mtod(m, struct llc *); 381 l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP; 382 l->llc_control = LLC_UI; 383 #ifdef ARGO_DEBUG 384 if (argo_debug[D_ETHER]) { 385 int i; 386 printf("unoutput: sending pkt to: "); 387 for (i=0; i<6; i++) 388 printf("%x ", edst[i] & 0xff); 389 printf("\n"); 390 } 391 #endif 392 } break; 393 #endif /* ISO */ 394 #ifdef LLC 395 /* case AF_NSAP: */ 396 case AF_CCITT: { 397 struct sockaddr_dl *sdl = 398 (struct sockaddr_dl *) rt -> rt_gateway; 399 400 if (sdl && sdl->sdl_family == AF_LINK 401 && sdl->sdl_alen > 0) { 402 bcopy(LLADDR(sdl), (char *)edst, 403 sizeof(edst)); 404 } else goto bad; /* Not a link interface ? Funny ... */ 405 if ((ifp->if_flags & IFF_SIMPLEX) && (*edst & 1) && 406 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 407 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 408 if (mcopy) { 409 eh = mtod(mcopy, struct ether_header *); 410 bcopy((caddr_t)edst, 411 (caddr_t)eh->ether_dhost, sizeof (edst)); 412 bcopy(LLADDR(ifp->if_sadl), 413 (caddr_t)eh->ether_shost, sizeof (edst)); 414 } 415 } 416 etype = htons(m->m_pkthdr.len); 417 #ifdef LLC_DEBUG 418 { 419 int i; 420 struct llc *l = mtod(m, struct llc *); 421 422 printf("ether_output: sending LLC2 pkt to: "); 423 for (i=0; i<6; i++) 424 printf("%x ", edst[i] & 0xff); 425 printf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n", 426 m->m_pkthdr.len, l->llc_dsap & 0xff, l->llc_ssap &0xff, 427 l->llc_control & 0xff); 428 429 } 430 #endif /* LLC_DEBUG */ 431 } break; 432 #endif /* LLC */ 433 434 case pseudo_AF_HDRCMPLT: 435 hdrcmplt = 1; 436 eh = (struct ether_header *)dst->sa_data; 437 bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, sizeof (esrc)); 438 /* FALLTHROUGH */ 439 440 case AF_UNSPEC: 441 eh = (struct ether_header *)dst->sa_data; 442 bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, sizeof (edst)); 443 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 444 etype = eh->ether_type; 445 break; 446 447 default: 448 printf("%s: can't handle af%d\n", ifp->if_xname, 449 dst->sa_family); 450 senderr(EAFNOSUPPORT); 451 } 452 453 if (mcopy) 454 (void) looutput(ifp, mcopy, dst, rt); 455 456 /* 457 * Add local net header. If no space in first mbuf, 458 * allocate another. 459 */ 460 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 461 if (m == 0) 462 senderr(ENOBUFS); 463 eh = mtod(m, struct ether_header *); 464 bcopy((caddr_t)&etype,(caddr_t)&eh->ether_type, 465 sizeof(eh->ether_type)); 466 bcopy((caddr_t)edst, (caddr_t)eh->ether_dhost, sizeof (edst)); 467 if (hdrcmplt) 468 bcopy((caddr_t)esrc, (caddr_t)eh->ether_shost, 469 sizeof(eh->ether_shost)); 470 else 471 bcopy(LLADDR(ifp->if_sadl), (caddr_t)eh->ether_shost, 472 sizeof(eh->ether_shost)); 473 #ifdef ALTQ 474 if (ALTQ_IS_ON(ifp)) { 475 s = splimp(); 476 error = (*ifp->if_altqenqueue)(ifp, m, &pr_hdr, ALTEQ_NORMAL); 477 splx(s); 478 if (error) { 479 IF_DROP(&ifp->if_snd); 480 } 481 else { 482 ifp->if_obytes += m->m_pkthdr.len; 483 if (m->m_flags & M_MCAST) 484 ifp->if_omcasts++; 485 } 486 return (error); 487 } 488 #endif /* ALTQ */ 489 s = splimp(); 490 /* 491 * Queue message on interface, and start output if interface 492 * not yet active. 493 */ 494 if (IF_QFULL(&ifp->if_snd)) { 495 IF_DROP(&ifp->if_snd); 496 #ifdef ALTQ_ACCOUNT 497 ALTQ_ACCOUNTING(ifp, m, &pr_hdr, ALTEQ_ACCDROP); 498 #endif 499 splx(s); 500 senderr(ENOBUFS); 501 } 502 ifp->if_obytes += m->m_pkthdr.len; 503 IF_ENQUEUE(&ifp->if_snd, m); 504 #ifdef ALTQ_ACCOUNT 505 ALTQ_ACCOUNTING(ifp, m, &pr_hdr, ALTEQ_ACCOK); 506 #endif 507 if ((ifp->if_flags & IFF_OACTIVE) == 0) 508 (*ifp->if_start)(ifp); 509 splx(s); 510 if (m->m_flags & M_MCAST) 511 ifp->if_omcasts++; 512 return (error); 513 514 bad: 515 if (m) 516 m_freem(m); 517 return (error); 518 } 519 520 /* 521 * Process a received Ethernet packet; 522 * the packet is in the mbuf chain m without 523 * the ether header, which is provided separately. 524 */ 525 void 526 ether_input(ifp, eh, m) 527 struct ifnet *ifp; 528 struct ether_header *eh; 529 struct mbuf *m; 530 { 531 struct ifqueue *inq; 532 u_int16_t etype; 533 int s; 534 #if defined (ISO) || defined (LLC) || defined(NETATALK) 535 struct llc *l; 536 #endif 537 538 if ((ifp->if_flags & IFF_UP) == 0) { 539 m_freem(m); 540 return; 541 } 542 ifp->if_lastchange = time; 543 ifp->if_ibytes += m->m_pkthdr.len + sizeof (*eh); 544 if (eh->ether_dhost[0] & 1) { 545 if (bcmp((caddr_t)etherbroadcastaddr, (caddr_t)eh->ether_dhost, 546 sizeof(etherbroadcastaddr)) == 0) 547 m->m_flags |= M_BCAST; 548 else 549 m->m_flags |= M_MCAST; 550 } 551 if (m->m_flags & (M_BCAST|M_MCAST)) 552 ifp->if_imcasts++; 553 554 etype = ntohs(eh->ether_type); 555 switch (etype) { 556 #ifdef INET 557 case ETHERTYPE_IP: 558 #ifdef GATEWAY 559 if (ipflow_fastforward(m)) 560 return; 561 #endif 562 schednetisr(NETISR_IP); 563 inq = &ipintrq; 564 break; 565 566 case ETHERTYPE_ARP: 567 schednetisr(NETISR_ARP); 568 inq = &arpintrq; 569 break; 570 571 case ETHERTYPE_REVARP: 572 revarpinput(m); /* XXX queue? */ 573 return; 574 #endif 575 #ifdef INET6 576 case ETHERTYPE_IPV6: 577 schednetisr(NETISR_IPV6); 578 inq = &ip6intrq; 579 break; 580 #endif 581 #ifdef NS 582 case ETHERTYPE_NS: 583 schednetisr(NETISR_NS); 584 inq = &nsintrq; 585 break; 586 587 #endif 588 #ifdef IPX 589 case ETHERTYPE_IPX: 590 schednetisr(NETISR_IPX); 591 inq = &ipxintrq; 592 break; 593 #endif 594 #ifdef NETATALK 595 case ETHERTYPE_ATALK: 596 schednetisr(NETISR_ATALK); 597 inq = &atintrq1; 598 break; 599 case ETHERTYPE_AARP: 600 /* probably this should be done with a NETISR as well */ 601 aarpinput(ifp, m); /* XXX */ 602 return; 603 #endif /* NETATALK */ 604 default: 605 #if defined (ISO) || defined (LLC) || defined (NETATALK) 606 if (etype > ETHERMTU) 607 goto dropanyway; 608 l = mtod(m, struct llc *); 609 switch (l->llc_dsap) { 610 #ifdef NETATALK 611 case LLC_SNAP_LSAP: 612 switch (l->llc_control) { 613 case LLC_UI: 614 if (l->llc_ssap != LLC_SNAP_LSAP) { 615 goto dropanyway; 616 } 617 618 if (Bcmp(&(l->llc_snap_org_code)[0], 619 at_org_code, sizeof(at_org_code)) == 0 && 620 ntohs(l->llc_snap_ether_type) == 621 ETHERTYPE_ATALK) { 622 inq = &atintrq2; 623 m_adj(m, sizeof(struct llc)); 624 schednetisr(NETISR_ATALK); 625 break; 626 } 627 628 if (Bcmp(&(l->llc_snap_org_code)[0], 629 aarp_org_code, 630 sizeof(aarp_org_code)) == 0 && 631 ntohs(l->llc_snap_ether_type) == 632 ETHERTYPE_AARP) { 633 m_adj( m, sizeof(struct llc)); 634 aarpinput(ifp, m); /* XXX */ 635 return; 636 } 637 638 default: 639 goto dropanyway; 640 } 641 break; 642 #endif /* NETATALK */ 643 #ifdef ISO 644 case LLC_ISO_LSAP: 645 switch (l->llc_control) { 646 case LLC_UI: 647 /* LLC_UI_P forbidden in class 1 service */ 648 if ((l->llc_dsap == LLC_ISO_LSAP) && 649 (l->llc_ssap == LLC_ISO_LSAP)) { 650 /* LSAP for ISO */ 651 if (m->m_pkthdr.len > etype) 652 m_adj(m, etype - m->m_pkthdr.len); 653 m->m_data += 3; /* XXX */ 654 m->m_len -= 3; /* XXX */ 655 m->m_pkthdr.len -= 3; /* XXX */ 656 M_PREPEND(m, sizeof *eh, M_DONTWAIT); 657 if (m == 0) 658 return; 659 *mtod(m, struct ether_header *) = *eh; 660 #ifdef ARGO_DEBUG 661 if (argo_debug[D_ETHER]) 662 printf("clnp packet"); 663 #endif 664 schednetisr(NETISR_ISO); 665 inq = &clnlintrq; 666 break; 667 } 668 goto dropanyway; 669 670 case LLC_XID: 671 case LLC_XID_P: 672 if(m->m_len < 6) 673 goto dropanyway; 674 l->llc_window = 0; 675 l->llc_fid = 9; 676 l->llc_class = 1; 677 l->llc_dsap = l->llc_ssap = 0; 678 /* Fall through to */ 679 case LLC_TEST: 680 case LLC_TEST_P: 681 { 682 struct sockaddr sa; 683 struct ether_header *eh2; 684 int i; 685 u_char c = l->llc_dsap; 686 687 l->llc_dsap = l->llc_ssap; 688 l->llc_ssap = c; 689 if (m->m_flags & (M_BCAST | M_MCAST)) 690 bcopy(LLADDR(ifp->if_sadl), 691 (caddr_t)eh->ether_dhost, 6); 692 sa.sa_family = AF_UNSPEC; 693 sa.sa_len = sizeof(sa); 694 eh2 = (struct ether_header *)sa.sa_data; 695 for (i = 0; i < 6; i++) { 696 eh2->ether_shost[i] = c = 697 eh->ether_dhost[i]; 698 eh2->ether_dhost[i] = 699 eh->ether_dhost[i] = 700 eh->ether_shost[i]; 701 eh->ether_shost[i] = c; 702 } 703 ifp->if_output(ifp, m, &sa, NULL); 704 return; 705 } 706 default: 707 m_freem(m); 708 return; 709 } 710 break; 711 #endif /* ISO */ 712 #ifdef LLC 713 case LLC_X25_LSAP: 714 { 715 if (m->m_pkthdr.len > etype) 716 m_adj(m, etype - m->m_pkthdr.len); 717 M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT); 718 if (m == 0) 719 return; 720 if ( !sdl_sethdrif(ifp, eh->ether_shost, LLC_X25_LSAP, 721 eh->ether_dhost, LLC_X25_LSAP, 6, 722 mtod(m, struct sdl_hdr *))) 723 panic("ETHER cons addr failure"); 724 mtod(m, struct sdl_hdr *)->sdlhdr_len = etype; 725 #ifdef LLC_DEBUG 726 printf("llc packet\n"); 727 #endif /* LLC_DEBUG */ 728 schednetisr(NETISR_CCITT); 729 inq = &llcintrq; 730 break; 731 } 732 #endif /* LLC */ 733 dropanyway: 734 default: 735 m_freem(m); 736 return; 737 } 738 #else /* ISO || LLC || NETATALK*/ 739 m_freem(m); 740 return; 741 #endif /* ISO || LLC || NETATALK*/ 742 } 743 744 s = splimp(); 745 if (IF_QFULL(inq)) { 746 IF_DROP(inq); 747 m_freem(m); 748 } else 749 IF_ENQUEUE(inq, m); 750 splx(s); 751 } 752 753 /* 754 * Convert Ethernet address to printable (loggable) representation. 755 */ 756 static char digits[] = "0123456789abcdef"; 757 char * 758 ether_sprintf(ap) 759 const u_char *ap; 760 { 761 static char etherbuf[18]; 762 char *cp = etherbuf; 763 int i; 764 765 for (i = 0; i < 6; i++) { 766 *cp++ = digits[*ap >> 4]; 767 *cp++ = digits[*ap++ & 0xf]; 768 *cp++ = ':'; 769 } 770 *--cp = 0; 771 return (etherbuf); 772 } 773 774 /* 775 * Perform common duties while attaching to interface list 776 */ 777 void 778 ether_ifattach(ifp, lla) 779 struct ifnet *ifp; 780 const u_int8_t *lla; 781 { 782 struct sockaddr_dl *sdl; 783 784 ifp->if_type = IFT_ETHER; 785 ifp->if_addrlen = 6; 786 ifp->if_hdrlen = 14; 787 ifp->if_mtu = ETHERMTU; 788 ifp->if_output = ether_output; 789 if ((sdl = ifp->if_sadl) && 790 sdl->sdl_family == AF_LINK) { 791 sdl->sdl_type = IFT_ETHER; 792 sdl->sdl_alen = ifp->if_addrlen; 793 bcopy(lla, LLADDR(sdl), ifp->if_addrlen); 794 } 795 LIST_INIT(&((struct ethercom *)ifp)->ec_multiaddrs); 796 ifp->if_broadcastaddr = etherbroadcastaddr; 797 #ifdef INET6 798 in6_ifattach_getifid(ifp); 799 #endif 800 } 801 802 u_char ether_ipmulticast_min[6] = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 803 u_char ether_ipmulticast_max[6] = { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 804 #ifdef INET6 805 u_char ether_ip6multicast_min[6] = { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 806 u_char ether_ip6multicast_max[6] = { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 807 #endif 808 /* 809 * Add an Ethernet multicast address or range of addresses to the list for a 810 * given interface. 811 */ 812 int 813 ether_addmulti(ifr, ec) 814 struct ifreq *ifr; 815 struct ethercom *ec; 816 { 817 struct ether_multi *enm; 818 #ifdef INET 819 struct sockaddr_in *sin; 820 #endif /* INET */ 821 #ifdef INET6 822 struct sockaddr_in6 *sin6; 823 #endif /* INET6 */ 824 u_char addrlo[6]; 825 u_char addrhi[6]; 826 int s = splimp(); 827 828 switch (ifr->ifr_addr.sa_family) { 829 830 case AF_UNSPEC: 831 bcopy(ifr->ifr_addr.sa_data, addrlo, 6); 832 bcopy(addrlo, addrhi, 6); 833 break; 834 835 #ifdef INET 836 case AF_INET: 837 sin = (struct sockaddr_in *)&(ifr->ifr_addr); 838 if (sin->sin_addr.s_addr == INADDR_ANY) { 839 /* 840 * An IP address of INADDR_ANY means listen to all 841 * of the Ethernet multicast addresses used for IP. 842 * (This is for the sake of IP multicast routers.) 843 */ 844 bcopy(ether_ipmulticast_min, addrlo, 6); 845 bcopy(ether_ipmulticast_max, addrhi, 6); 846 } 847 else { 848 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 849 bcopy(addrlo, addrhi, 6); 850 } 851 break; 852 #endif 853 #ifdef INET6 854 case AF_INET6: 855 sin6 = (struct sockaddr_in6 *) 856 &(((struct in6_ifreq *)ifr)->ifr_addr); 857 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 858 /* 859 * An IP6 address of 0 means listen to all 860 * of the Ethernet multicast address used for IP6. 861 * (This is used for multicast routers.) 862 */ 863 bcopy(ether_ip6multicast_min, addrlo, ETHER_ADDR_LEN); 864 bcopy(ether_ip6multicast_max, addrhi, ETHER_ADDR_LEN); 865 #if 0 866 set_allmulti = 1; 867 #endif 868 } else { 869 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 870 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 871 } 872 break; 873 #endif 874 875 default: 876 splx(s); 877 return (EAFNOSUPPORT); 878 } 879 880 /* 881 * Verify that we have valid Ethernet multicast addresses. 882 */ 883 if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) { 884 splx(s); 885 return (EINVAL); 886 } 887 /* 888 * See if the address range is already in the list. 889 */ 890 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 891 if (enm != NULL) { 892 /* 893 * Found it; just increment the reference count. 894 */ 895 ++enm->enm_refcount; 896 splx(s); 897 return (0); 898 } 899 /* 900 * New address or range; malloc a new multicast record 901 * and link it into the interface's multicast list. 902 */ 903 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 904 if (enm == NULL) { 905 splx(s); 906 return (ENOBUFS); 907 } 908 bcopy(addrlo, enm->enm_addrlo, 6); 909 bcopy(addrhi, enm->enm_addrhi, 6); 910 enm->enm_ec = ec; 911 enm->enm_refcount = 1; 912 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 913 ec->ec_multicnt++; 914 splx(s); 915 /* 916 * Return ENETRESET to inform the driver that the list has changed 917 * and its reception filter should be adjusted accordingly. 918 */ 919 return (ENETRESET); 920 } 921 922 /* 923 * Delete a multicast address record. 924 */ 925 int 926 ether_delmulti(ifr, ec) 927 struct ifreq *ifr; 928 struct ethercom *ec; 929 { 930 struct ether_multi *enm; 931 #ifdef INET 932 struct sockaddr_in *sin; 933 #endif /* INET */ 934 #ifdef INET6 935 struct sockaddr_in6 *sin6; 936 #endif /* INET6 */ 937 u_char addrlo[6]; 938 u_char addrhi[6]; 939 int s = splimp(); 940 941 switch (ifr->ifr_addr.sa_family) { 942 943 case AF_UNSPEC: 944 bcopy(ifr->ifr_addr.sa_data, addrlo, 6); 945 bcopy(addrlo, addrhi, 6); 946 break; 947 948 #ifdef INET 949 case AF_INET: 950 sin = (struct sockaddr_in *)&(ifr->ifr_addr); 951 if (sin->sin_addr.s_addr == INADDR_ANY) { 952 /* 953 * An IP address of INADDR_ANY means stop listening 954 * to the range of Ethernet multicast addresses used 955 * for IP. 956 */ 957 bcopy(ether_ipmulticast_min, addrlo, 6); 958 bcopy(ether_ipmulticast_max, addrhi, 6); 959 } 960 else { 961 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 962 bcopy(addrlo, addrhi, 6); 963 } 964 break; 965 #endif 966 #ifdef INET6 967 case AF_INET6: 968 sin6 = (struct sockaddr_in6 *)&(ifr->ifr_addr); 969 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 970 /* 971 * An IP6 address of all 0 means stop listening 972 * to the range of Ethernet multicast addresses used 973 * for IP6 974 */ 975 bcopy(ether_ip6multicast_min, addrlo, ETHER_ADDR_LEN); 976 bcopy(ether_ip6multicast_max, addrhi, ETHER_ADDR_LEN); 977 } else { 978 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 979 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 980 } 981 break; 982 #endif 983 984 default: 985 splx(s); 986 return (EAFNOSUPPORT); 987 } 988 989 /* 990 * Look up the address in our list. 991 */ 992 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 993 if (enm == NULL) { 994 splx(s); 995 return (ENXIO); 996 } 997 if (--enm->enm_refcount != 0) { 998 /* 999 * Still some claims to this record. 1000 */ 1001 splx(s); 1002 return (0); 1003 } 1004 /* 1005 * No remaining claims to this record; unlink and free it. 1006 */ 1007 LIST_REMOVE(enm, enm_list); 1008 free(enm, M_IFMADDR); 1009 ec->ec_multicnt--; 1010 splx(s); 1011 /* 1012 * Return ENETRESET to inform the driver that the list has changed 1013 * and its reception filter should be adjusted accordingly. 1014 */ 1015 return (ENETRESET); 1016 } 1017
Indexes created Tue Sep 30 10:09:55 GMT 2025