if_ethersubr.c revision 1.41.6.1
1 /* $NetBSD: if_ethersubr.c,v 1.41.6.1 1999/06/28 06:36:55 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 #endif 110 111 #ifdef NS 112 #include <netns/ns.h> 113 #include <netns/ns_if.h> 114 #endif 115 116 #ifdef IPX 117 #include <netipx/ipx.h> 118 #include <netipx/ipx_if.h> 119 #endif 120 121 #ifdef ISO 122 #include <netiso/argo_debug.h> 123 #include <netiso/iso.h> 124 #include <netiso/iso_var.h> 125 #include <netiso/iso_snpac.h> 126 #endif 127 128 #ifdef LLC 129 #include <netccitt/dll.h> 130 #include <netccitt/llc_var.h> 131 #endif 132 133 #if defined(LLC) && defined(CCITT) 134 extern struct ifqueue pkintrq; 135 #endif 136 137 #ifdef NETATALK 138 #include <netatalk/at.h> 139 #include <netatalk/at_var.h> 140 #include <netatalk/at_extern.h> 141 142 #define llc_snap_org_code llc_un.type_snap.org_code 143 #define llc_snap_ether_type llc_un.type_snap.ether_type 144 145 extern u_char at_org_code[3]; 146 extern u_char aarp_org_code[3]; 147 #endif /* NETATALK */ 148 149 u_char etherbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 150 #define senderr(e) { error = (e); goto bad;} 151 152 #define SIN(x) ((struct sockaddr_in *)x) 153 154 /* 155 * Ethernet output routine. 156 * Encapsulate a packet of type family for the local net. 157 * Assumes that ifp is actually pointer to ethercom structure. 158 */ 159 int 160 ether_output(ifp, m0, dst, rt0) 161 struct ifnet *ifp; 162 struct mbuf *m0; 163 struct sockaddr *dst; 164 struct rtentry *rt0; 165 { 166 u_int16_t etype; 167 int s, error = 0, hdrcmplt = 0; 168 u_char esrc[6], edst[6]; 169 struct mbuf *m = m0; 170 struct rtentry *rt; 171 struct mbuf *mcopy = (struct mbuf *)0; 172 struct ether_header *eh; 173 #ifdef INET 174 struct arphdr *ah; 175 #endif /* INET */ 176 #ifdef NETATALK 177 struct at_ifaddr *aa; 178 #endif /* NETATALK */ 179 180 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 181 senderr(ENETDOWN); 182 ifp->if_lastchange = time; 183 if ((rt = rt0) != NULL) { 184 if ((rt->rt_flags & RTF_UP) == 0) { 185 if ((rt0 = rt = rtalloc1(dst, 1)) != NULL) { 186 rt->rt_refcnt--; 187 if (rt->rt_ifp != ifp) 188 return (*rt->rt_ifp->if_output) 189 (ifp, m0, dst, rt); 190 } else 191 senderr(EHOSTUNREACH); 192 } 193 if ((rt->rt_flags & RTF_GATEWAY) && dst->sa_family != AF_NS) { 194 if (rt->rt_gwroute == 0) 195 goto lookup; 196 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 197 rtfree(rt); rt = rt0; 198 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1); 199 if ((rt = rt->rt_gwroute) == 0) 200 senderr(EHOSTUNREACH); 201 /* the "G" test below also prevents rt == rt0 */ 202 if ((rt->rt_flags & RTF_GATEWAY) || 203 (rt->rt_ifp != ifp)) { 204 rt->rt_refcnt--; 205 rt0->rt_gwroute = 0; 206 senderr(EHOSTUNREACH); 207 } 208 } 209 } 210 if (rt->rt_flags & RTF_REJECT) 211 if (rt->rt_rmx.rmx_expire == 0 || 212 time.tv_sec < rt->rt_rmx.rmx_expire) 213 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 214 } 215 switch (dst->sa_family) { 216 217 #ifdef INET 218 case AF_INET: 219 if (m->m_flags & M_BCAST) 220 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 221 sizeof(edst)); 222 223 else if (m->m_flags & M_MCAST) { 224 ETHER_MAP_IP_MULTICAST(&SIN(dst)->sin_addr, 225 (caddr_t)edst) 226 227 } else if (!arpresolve(ifp, rt, m, dst, edst)) 228 return (0); /* if not yet resolved */ 229 /* If broadcasting on a simplex interface, loopback a copy */ 230 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 231 mcopy = m_copy(m, 0, (int)M_COPYALL); 232 etype = htons(ETHERTYPE_IP); 233 break; 234 235 case AF_ARP: 236 ah = mtod(m, struct arphdr *); 237 if (m->m_flags & M_BCAST) 238 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 239 sizeof(edst)); 240 else 241 bcopy((caddr_t)ar_tha(ah), 242 (caddr_t)edst, sizeof(edst)); 243 244 ah->ar_hrd = htons(ARPHRD_ETHER); 245 246 switch(ntohs(ah->ar_op)) { 247 case ARPOP_REVREQUEST: 248 case ARPOP_REVREPLY: 249 etype = htons(ETHERTYPE_REVARP); 250 break; 251 252 case ARPOP_REQUEST: 253 case ARPOP_REPLY: 254 default: 255 etype = htons(ETHERTYPE_ARP); 256 } 257 258 break; 259 #endif 260 #ifdef INET6 261 case AF_INET6: 262 #ifdef NEWIP6OUTPUT 263 if (!nd6_storelladdr(ifp, rt, m, dst, (u_char *)edst)) 264 return(0); /* it must be impossible, but... */ 265 #else 266 if (!nd6_resolve(ifp, rt, m, dst, (u_char *)edst)) 267 return(0); /* if not yet resolves */ 268 #endif /* NEWIP6OUTPUT */ 269 etype = htons(ETHERTYPE_IPV6); 270 break; 271 #endif 272 #ifdef NETATALK 273 case AF_APPLETALK: 274 if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) { 275 #ifdef NETATALKDEBUG 276 printf("aarpresolv failed\n"); 277 #endif /* NETATALKDEBUG */ 278 return (0); 279 } 280 /* 281 * ifaddr is the first thing in at_ifaddr 282 */ 283 aa = (struct at_ifaddr *) at_ifawithnet( 284 (struct sockaddr_at *)dst, ifp); 285 if (aa == NULL) 286 goto bad; 287 288 /* 289 * In the phase 2 case, we need to prepend an mbuf for the 290 * llc header. Since we must preserve the value of m, 291 * which is passed to us by value, we m_copy() the first 292 * mbuf, and use it for our llc header. 293 */ 294 if (aa->aa_flags & AFA_PHASE2) { 295 struct llc llc; 296 297 M_PREPEND(m, sizeof(struct llc), M_WAIT); 298 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 299 llc.llc_control = LLC_UI; 300 bcopy(at_org_code, llc.llc_snap_org_code, 301 sizeof(llc.llc_snap_org_code)); 302 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 303 bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc)); 304 etype = htons(m->m_pkthdr.len); 305 } else { 306 etype = htons(ETHERTYPE_ATALK); 307 } 308 break; 309 #endif /* NETATALK */ 310 #ifdef NS 311 case AF_NS: 312 etype = htons(ETHERTYPE_NS); 313 bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host), 314 (caddr_t)edst, sizeof (edst)); 315 if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst))) 316 return (looutput(ifp, m, dst, rt)); 317 /* If broadcasting on a simplex interface, loopback a copy */ 318 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 319 mcopy = m_copy(m, 0, (int)M_COPYALL); 320 break; 321 #endif 322 #ifdef IPX 323 case AF_IPX: 324 etype = htons(ETHERTYPE_IPX); 325 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 326 (caddr_t)edst, sizeof (edst)); 327 /* If broadcasting on a simplex interface, loopback a copy */ 328 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 329 mcopy = m_copy(m, 0, (int)M_COPYALL); 330 break; 331 #endif 332 #ifdef ISO 333 case AF_ISO: { 334 int snpalen; 335 struct llc *l; 336 struct sockaddr_dl *sdl; 337 338 if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) && 339 sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) { 340 bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst)); 341 } else { 342 error = iso_snparesolve(ifp, (struct sockaddr_iso *)dst, 343 (char *)edst, &snpalen); 344 if (error) 345 goto bad; /* Not Resolved */ 346 } 347 /* If broadcasting on a simplex interface, loopback a copy */ 348 if (*edst & 1) 349 m->m_flags |= (M_BCAST|M_MCAST); 350 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) && 351 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 352 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 353 if (mcopy) { 354 eh = mtod(mcopy, struct ether_header *); 355 bcopy((caddr_t)edst, 356 (caddr_t)eh->ether_dhost, sizeof (edst)); 357 bcopy(LLADDR(ifp->if_sadl), 358 (caddr_t)eh->ether_shost, sizeof (edst)); 359 } 360 } 361 M_PREPEND(m, 3, M_DONTWAIT); 362 if (m == NULL) 363 return (0); 364 etype = htons(m->m_pkthdr.len); 365 l = mtod(m, struct llc *); 366 l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP; 367 l->llc_control = LLC_UI; 368 #ifdef ARGO_DEBUG 369 if (argo_debug[D_ETHER]) { 370 int i; 371 printf("unoutput: sending pkt to: "); 372 for (i=0; i<6; i++) 373 printf("%x ", edst[i] & 0xff); 374 printf("\n"); 375 } 376 #endif 377 } break; 378 #endif /* ISO */ 379 #ifdef LLC 380 /* case AF_NSAP: */ 381 case AF_CCITT: { 382 struct sockaddr_dl *sdl = 383 (struct sockaddr_dl *) rt -> rt_gateway; 384 385 if (sdl && sdl->sdl_family == AF_LINK 386 && sdl->sdl_alen > 0) { 387 bcopy(LLADDR(sdl), (char *)edst, 388 sizeof(edst)); 389 } else goto bad; /* Not a link interface ? Funny ... */ 390 if ((ifp->if_flags & IFF_SIMPLEX) && (*edst & 1) && 391 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 392 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 393 if (mcopy) { 394 eh = mtod(mcopy, struct ether_header *); 395 bcopy((caddr_t)edst, 396 (caddr_t)eh->ether_dhost, sizeof (edst)); 397 bcopy(LLADDR(ifp->if_sadl), 398 (caddr_t)eh->ether_shost, sizeof (edst)); 399 } 400 } 401 etype = htons(m->m_pkthdr.len); 402 #ifdef LLC_DEBUG 403 { 404 int i; 405 struct llc *l = mtod(m, struct llc *); 406 407 printf("ether_output: sending LLC2 pkt to: "); 408 for (i=0; i<6; i++) 409 printf("%x ", edst[i] & 0xff); 410 printf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n", 411 m->m_pkthdr.len, l->llc_dsap & 0xff, l->llc_ssap &0xff, 412 l->llc_control & 0xff); 413 414 } 415 #endif /* LLC_DEBUG */ 416 } break; 417 #endif /* LLC */ 418 419 case pseudo_AF_HDRCMPLT: 420 hdrcmplt = 1; 421 eh = (struct ether_header *)dst->sa_data; 422 bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, sizeof (esrc)); 423 /* FALLTHROUGH */ 424 425 case AF_UNSPEC: 426 eh = (struct ether_header *)dst->sa_data; 427 bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, sizeof (edst)); 428 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 429 etype = eh->ether_type; 430 break; 431 432 default: 433 printf("%s: can't handle af%d\n", ifp->if_xname, 434 dst->sa_family); 435 senderr(EAFNOSUPPORT); 436 } 437 438 if (mcopy) 439 (void) looutput(ifp, mcopy, dst, rt); 440 441 /* 442 * Add local net header. If no space in first mbuf, 443 * allocate another. 444 */ 445 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 446 if (m == 0) 447 senderr(ENOBUFS); 448 eh = mtod(m, struct ether_header *); 449 bcopy((caddr_t)&etype,(caddr_t)&eh->ether_type, 450 sizeof(eh->ether_type)); 451 bcopy((caddr_t)edst, (caddr_t)eh->ether_dhost, sizeof (edst)); 452 if (hdrcmplt) 453 bcopy((caddr_t)esrc, (caddr_t)eh->ether_shost, 454 sizeof(eh->ether_shost)); 455 else 456 bcopy(LLADDR(ifp->if_sadl), (caddr_t)eh->ether_shost, 457 sizeof(eh->ether_shost)); 458 s = splimp(); 459 /* 460 * Queue message on interface, and start output if interface 461 * not yet active. 462 */ 463 if (IF_QFULL(&ifp->if_snd)) { 464 IF_DROP(&ifp->if_snd); 465 splx(s); 466 senderr(ENOBUFS); 467 } 468 ifp->if_obytes += m->m_pkthdr.len; 469 IF_ENQUEUE(&ifp->if_snd, m); 470 if ((ifp->if_flags & IFF_OACTIVE) == 0) 471 (*ifp->if_start)(ifp); 472 splx(s); 473 if (m->m_flags & M_MCAST) 474 ifp->if_omcasts++; 475 return (error); 476 477 bad: 478 if (m) 479 m_freem(m); 480 return (error); 481 } 482 483 /* 484 * Process a received Ethernet packet; 485 * the packet is in the mbuf chain m without 486 * the ether header, which is provided separately. 487 */ 488 void 489 ether_input(ifp, eh, m) 490 struct ifnet *ifp; 491 struct ether_header *eh; 492 struct mbuf *m; 493 { 494 struct ifqueue *inq; 495 u_int16_t etype; 496 int s; 497 #if defined (ISO) || defined (LLC) || defined(NETATALK) 498 struct llc *l; 499 #endif 500 501 if ((ifp->if_flags & IFF_UP) == 0) { 502 m_freem(m); 503 return; 504 } 505 ifp->if_lastchange = time; 506 ifp->if_ibytes += m->m_pkthdr.len + sizeof (*eh); 507 if (eh->ether_dhost[0] & 1) { 508 if (bcmp((caddr_t)etherbroadcastaddr, (caddr_t)eh->ether_dhost, 509 sizeof(etherbroadcastaddr)) == 0) 510 m->m_flags |= M_BCAST; 511 else 512 m->m_flags |= M_MCAST; 513 } 514 if (m->m_flags & (M_BCAST|M_MCAST)) 515 ifp->if_imcasts++; 516 517 etype = ntohs(eh->ether_type); 518 switch (etype) { 519 #ifdef INET 520 case ETHERTYPE_IP: 521 #ifdef GATEWAY 522 if (ipflow_fastforward(m)) 523 return; 524 #endif 525 schednetisr(NETISR_IP); 526 inq = &ipintrq; 527 break; 528 529 case ETHERTYPE_ARP: 530 schednetisr(NETISR_ARP); 531 inq = &arpintrq; 532 break; 533 534 case ETHERTYPE_REVARP: 535 revarpinput(m); /* XXX queue? */ 536 return; 537 #endif 538 #ifdef INET6 539 case ETHERTYPE_IPV6: 540 schednetisr(NETISR_IPV6); 541 inq = &ip6intrq; 542 break; 543 #endif 544 #ifdef NS 545 case ETHERTYPE_NS: 546 schednetisr(NETISR_NS); 547 inq = &nsintrq; 548 break; 549 550 #endif 551 #ifdef IPX 552 case ETHERTYPE_IPX: 553 schednetisr(NETISR_IPX); 554 inq = &ipxintrq; 555 break; 556 #endif 557 #ifdef NETATALK 558 case ETHERTYPE_ATALK: 559 schednetisr(NETISR_ATALK); 560 inq = &atintrq1; 561 break; 562 case ETHERTYPE_AARP: 563 /* probably this should be done with a NETISR as well */ 564 aarpinput(ifp, m); /* XXX */ 565 return; 566 #endif /* NETATALK */ 567 default: 568 #if defined (ISO) || defined (LLC) || defined (NETATALK) 569 if (etype > ETHERMTU) 570 goto dropanyway; 571 l = mtod(m, struct llc *); 572 switch (l->llc_dsap) { 573 #ifdef NETATALK 574 case LLC_SNAP_LSAP: 575 switch (l->llc_control) { 576 case LLC_UI: 577 if (l->llc_ssap != LLC_SNAP_LSAP) { 578 goto dropanyway; 579 } 580 581 if (Bcmp(&(l->llc_snap_org_code)[0], 582 at_org_code, sizeof(at_org_code)) == 0 && 583 ntohs(l->llc_snap_ether_type) == 584 ETHERTYPE_ATALK) { 585 inq = &atintrq2; 586 m_adj(m, sizeof(struct llc)); 587 schednetisr(NETISR_ATALK); 588 break; 589 } 590 591 if (Bcmp(&(l->llc_snap_org_code)[0], 592 aarp_org_code, 593 sizeof(aarp_org_code)) == 0 && 594 ntohs(l->llc_snap_ether_type) == 595 ETHERTYPE_AARP) { 596 m_adj( m, sizeof(struct llc)); 597 aarpinput(ifp, m); /* XXX */ 598 return; 599 } 600 601 default: 602 goto dropanyway; 603 } 604 break; 605 #endif /* NETATALK */ 606 #ifdef ISO 607 case LLC_ISO_LSAP: 608 switch (l->llc_control) { 609 case LLC_UI: 610 /* LLC_UI_P forbidden in class 1 service */ 611 if ((l->llc_dsap == LLC_ISO_LSAP) && 612 (l->llc_ssap == LLC_ISO_LSAP)) { 613 /* LSAP for ISO */ 614 if (m->m_pkthdr.len > etype) 615 m_adj(m, etype - m->m_pkthdr.len); 616 m->m_data += 3; /* XXX */ 617 m->m_len -= 3; /* XXX */ 618 m->m_pkthdr.len -= 3; /* XXX */ 619 M_PREPEND(m, sizeof *eh, M_DONTWAIT); 620 if (m == 0) 621 return; 622 *mtod(m, struct ether_header *) = *eh; 623 #ifdef ARGO_DEBUG 624 if (argo_debug[D_ETHER]) 625 printf("clnp packet"); 626 #endif 627 schednetisr(NETISR_ISO); 628 inq = &clnlintrq; 629 break; 630 } 631 goto dropanyway; 632 633 case LLC_XID: 634 case LLC_XID_P: 635 if(m->m_len < 6) 636 goto dropanyway; 637 l->llc_window = 0; 638 l->llc_fid = 9; 639 l->llc_class = 1; 640 l->llc_dsap = l->llc_ssap = 0; 641 /* Fall through to */ 642 case LLC_TEST: 643 case LLC_TEST_P: 644 { 645 struct sockaddr sa; 646 struct ether_header *eh2; 647 int i; 648 u_char c = l->llc_dsap; 649 650 l->llc_dsap = l->llc_ssap; 651 l->llc_ssap = c; 652 if (m->m_flags & (M_BCAST | M_MCAST)) 653 bcopy(LLADDR(ifp->if_sadl), 654 (caddr_t)eh->ether_dhost, 6); 655 sa.sa_family = AF_UNSPEC; 656 sa.sa_len = sizeof(sa); 657 eh2 = (struct ether_header *)sa.sa_data; 658 for (i = 0; i < 6; i++) { 659 eh2->ether_shost[i] = c = 660 eh->ether_dhost[i]; 661 eh2->ether_dhost[i] = 662 eh->ether_dhost[i] = 663 eh->ether_shost[i]; 664 eh->ether_shost[i] = c; 665 } 666 ifp->if_output(ifp, m, &sa, NULL); 667 return; 668 } 669 default: 670 m_freem(m); 671 return; 672 } 673 break; 674 #endif /* ISO */ 675 #ifdef LLC 676 case LLC_X25_LSAP: 677 { 678 if (m->m_pkthdr.len > etype) 679 m_adj(m, etype - m->m_pkthdr.len); 680 M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT); 681 if (m == 0) 682 return; 683 if ( !sdl_sethdrif(ifp, eh->ether_shost, LLC_X25_LSAP, 684 eh->ether_dhost, LLC_X25_LSAP, 6, 685 mtod(m, struct sdl_hdr *))) 686 panic("ETHER cons addr failure"); 687 mtod(m, struct sdl_hdr *)->sdlhdr_len = etype; 688 #ifdef LLC_DEBUG 689 printf("llc packet\n"); 690 #endif /* LLC_DEBUG */ 691 schednetisr(NETISR_CCITT); 692 inq = &llcintrq; 693 break; 694 } 695 #endif /* LLC */ 696 dropanyway: 697 default: 698 m_freem(m); 699 return; 700 } 701 #else /* ISO || LLC || NETATALK*/ 702 m_freem(m); 703 return; 704 #endif /* ISO || LLC || NETATALK*/ 705 } 706 707 s = splimp(); 708 if (IF_QFULL(inq)) { 709 IF_DROP(inq); 710 m_freem(m); 711 } else 712 IF_ENQUEUE(inq, m); 713 splx(s); 714 } 715 716 /* 717 * Convert Ethernet address to printable (loggable) representation. 718 */ 719 static char digits[] = "0123456789abcdef"; 720 char * 721 ether_sprintf(ap) 722 const u_char *ap; 723 { 724 static char etherbuf[18]; 725 char *cp = etherbuf; 726 int i; 727 728 for (i = 0; i < 6; i++) { 729 *cp++ = digits[*ap >> 4]; 730 *cp++ = digits[*ap++ & 0xf]; 731 *cp++ = ':'; 732 } 733 *--cp = 0; 734 return (etherbuf); 735 } 736 737 /* 738 * Perform common duties while attaching to interface list 739 */ 740 void 741 ether_ifattach(ifp, lla) 742 struct ifnet *ifp; 743 const u_int8_t *lla; 744 { 745 struct sockaddr_dl *sdl; 746 747 ifp->if_type = IFT_ETHER; 748 ifp->if_addrlen = 6; 749 ifp->if_hdrlen = 14; 750 ifp->if_mtu = ETHERMTU; 751 ifp->if_output = ether_output; 752 if ((sdl = ifp->if_sadl) && 753 sdl->sdl_family == AF_LINK) { 754 sdl->sdl_type = IFT_ETHER; 755 sdl->sdl_alen = ifp->if_addrlen; 756 bcopy(lla, LLADDR(sdl), ifp->if_addrlen); 757 } 758 LIST_INIT(&((struct ethercom *)ifp)->ec_multiaddrs); 759 ifp->if_broadcastaddr = etherbroadcastaddr; 760 } 761 762 u_char ether_ipmulticast_min[6] = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 763 u_char ether_ipmulticast_max[6] = { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 764 #ifdef INET6 765 u_char ether_ip6multicast_min[6] = { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 766 u_char ether_ip6multicast_max[6] = { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 767 #endif 768 /* 769 * Add an Ethernet multicast address or range of addresses to the list for a 770 * given interface. 771 */ 772 int 773 ether_addmulti(ifr, ec) 774 struct ifreq *ifr; 775 struct ethercom *ec; 776 { 777 struct ether_multi *enm; 778 #ifdef INET 779 struct sockaddr_in *sin; 780 #endif /* INET */ 781 #ifdef INET6 782 struct sockaddr_in6 *sin6; 783 #endif /* INET6 */ 784 u_char addrlo[6]; 785 u_char addrhi[6]; 786 int s = splimp(); 787 788 switch (ifr->ifr_addr.sa_family) { 789 790 case AF_UNSPEC: 791 bcopy(ifr->ifr_addr.sa_data, addrlo, 6); 792 bcopy(addrlo, addrhi, 6); 793 break; 794 795 #ifdef INET 796 case AF_INET: 797 sin = (struct sockaddr_in *)&(ifr->ifr_addr); 798 if (sin->sin_addr.s_addr == INADDR_ANY) { 799 /* 800 * An IP address of INADDR_ANY means listen to all 801 * of the Ethernet multicast addresses used for IP. 802 * (This is for the sake of IP multicast routers.) 803 */ 804 bcopy(ether_ipmulticast_min, addrlo, 6); 805 bcopy(ether_ipmulticast_max, addrhi, 6); 806 } 807 else { 808 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 809 bcopy(addrlo, addrhi, 6); 810 } 811 break; 812 #endif 813 #ifdef INET6 814 case AF_INET6: 815 sin6 = (struct sockaddr_in6 *) 816 &(((struct in6_ifreq *)ifr)->ifr_addr); 817 if (IN6_IS_ADDR_ANY(&sin6->sin6_addr)) { 818 /* 819 * An IP6 address of 0 means listen to all 820 * of the Ethernet multicast address used for IP6. 821 * (This is used for multicast routers.) 822 */ 823 bcopy(ether_ip6multicast_min, addrlo, ETHER_ADDR_LEN); 824 bcopy(ether_ip6multicast_max, addrhi, ETHER_ADDR_LEN); 825 #if 0 826 set_allmulti = 1; 827 #endif 828 } else { 829 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 830 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 831 } 832 break; 833 #endif 834 835 default: 836 splx(s); 837 return (EAFNOSUPPORT); 838 } 839 840 /* 841 * Verify that we have valid Ethernet multicast addresses. 842 */ 843 if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) { 844 splx(s); 845 return (EINVAL); 846 } 847 /* 848 * See if the address range is already in the list. 849 */ 850 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 851 if (enm != NULL) { 852 /* 853 * Found it; just increment the reference count. 854 */ 855 ++enm->enm_refcount; 856 splx(s); 857 return (0); 858 } 859 /* 860 * New address or range; malloc a new multicast record 861 * and link it into the interface's multicast list. 862 */ 863 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 864 if (enm == NULL) { 865 splx(s); 866 return (ENOBUFS); 867 } 868 bcopy(addrlo, enm->enm_addrlo, 6); 869 bcopy(addrhi, enm->enm_addrhi, 6); 870 enm->enm_ec = ec; 871 enm->enm_refcount = 1; 872 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 873 ec->ec_multicnt++; 874 splx(s); 875 /* 876 * Return ENETRESET to inform the driver that the list has changed 877 * and its reception filter should be adjusted accordingly. 878 */ 879 return (ENETRESET); 880 } 881 882 /* 883 * Delete a multicast address record. 884 */ 885 int 886 ether_delmulti(ifr, ec) 887 struct ifreq *ifr; 888 struct ethercom *ec; 889 { 890 struct ether_multi *enm; 891 #ifdef INET 892 struct sockaddr_in *sin; 893 #endif /* INET */ 894 #ifdef INET6 895 struct sockaddr_in6 *sin6; 896 #endif /* INET6 */ 897 u_char addrlo[6]; 898 u_char addrhi[6]; 899 int s = splimp(); 900 901 switch (ifr->ifr_addr.sa_family) { 902 903 case AF_UNSPEC: 904 bcopy(ifr->ifr_addr.sa_data, addrlo, 6); 905 bcopy(addrlo, addrhi, 6); 906 break; 907 908 #ifdef INET 909 case AF_INET: 910 sin = (struct sockaddr_in *)&(ifr->ifr_addr); 911 if (sin->sin_addr.s_addr == INADDR_ANY) { 912 /* 913 * An IP address of INADDR_ANY means stop listening 914 * to the range of Ethernet multicast addresses used 915 * for IP. 916 */ 917 bcopy(ether_ipmulticast_min, addrlo, 6); 918 bcopy(ether_ipmulticast_max, addrhi, 6); 919 } 920 else { 921 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 922 bcopy(addrlo, addrhi, 6); 923 } 924 break; 925 #endif 926 #ifdef INET6 927 case AF_INET6: 928 sin6 = (struct sockaddr_in6 *)&(ifr->ifr_addr); 929 if (IN6_IS_ADDR_ANY(&sin6->sin6_addr)) { 930 /* 931 * An IP6 address of all 0 means stop listening 932 * to the range of Ethernet multicast addresses used 933 * for IP6 934 */ 935 bcopy(ether_ip6multicast_min, addrlo, ETHER_ADDR_LEN); 936 bcopy(ether_ip6multicast_max, addrhi, ETHER_ADDR_LEN); 937 } else { 938 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 939 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 940 } 941 break; 942 #endif 943 944 default: 945 splx(s); 946 return (EAFNOSUPPORT); 947 } 948 949 /* 950 * Look up the address in our list. 951 */ 952 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 953 if (enm == NULL) { 954 splx(s); 955 return (ENXIO); 956 } 957 if (--enm->enm_refcount != 0) { 958 /* 959 * Still some claims to this record. 960 */ 961 splx(s); 962 return (0); 963 } 964 /* 965 * No remaining claims to this record; unlink and free it. 966 */ 967 LIST_REMOVE(enm, enm_list); 968 free(enm, M_IFMADDR); 969 ec->ec_multicnt--; 970 splx(s); 971 /* 972 * Return ENETRESET to inform the driver that the list has changed 973 * and its reception filter should be adjusted accordingly. 974 */ 975 return (ENETRESET); 976 } 977
Indexes created Tue Sep 30 10:09:55 GMT 2025