if_ethersubr.c revision 1.104
1 /* $NetBSD: if_ethersubr.c,v 1.104 2003/02/26 06:31:12 matt Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1982, 1989, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)if_ethersubr.c 8.2 (Berkeley) 4/4/96 65 */ 66 67 #include <sys/cdefs.h> 68 __KERNEL_RCSID(0, "$NetBSD: if_ethersubr.c,v 1.104 2003/02/26 06:31:12 matt Exp $"); 69 70 #include "opt_inet.h" 71 #include "opt_atalk.h" 72 #include "opt_ccitt.h" 73 #include "opt_llc.h" 74 #include "opt_iso.h" 75 #include "opt_ns.h" 76 #include "opt_gateway.h" 77 #include "opt_pfil_hooks.h" 78 #include "vlan.h" 79 #include "pppoe.h" 80 #include "bridge.h" 81 #include "bpfilter.h" 82 #include "arp.h" 83 84 #include <sys/param.h> 85 #include <sys/systm.h> 86 #include <sys/kernel.h> 87 #include <sys/callout.h> 88 #include <sys/malloc.h> 89 #include <sys/mbuf.h> 90 #include <sys/protosw.h> 91 #include <sys/socket.h> 92 #include <sys/ioctl.h> 93 #include <sys/errno.h> 94 #include <sys/syslog.h> 95 96 #include <machine/cpu.h> 97 98 #include <net/if.h> 99 #include <net/netisr.h> 100 #include <net/route.h> 101 #include <net/if_llc.h> 102 #include <net/if_dl.h> 103 #include <net/if_types.h> 104 105 #if NARP == 0 106 /* 107 * XXX there should really be a way to issue this warning from within config(8) 108 */ 109 #error You have included 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, ppppoe or vlan. 110 #endif 111 112 #if NBPFILTER > 0 113 #include <net/bpf.h> 114 #endif 115 116 #include <net/if_ether.h> 117 #if NVLAN > 0 118 #include <net/if_vlanvar.h> 119 #endif 120 121 #if NPPPOE > 0 122 #include <net/if_pppoe.h> 123 #endif 124 125 #if NBRIDGE > 0 126 #include <net/if_bridgevar.h> 127 #endif 128 129 #include <netinet/in.h> 130 #ifdef INET 131 #include <netinet/in_var.h> 132 #endif 133 #include <netinet/if_inarp.h> 134 135 #ifdef INET6 136 #ifndef INET 137 #include <netinet/in.h> 138 #endif 139 #include <netinet6/in6_var.h> 140 #include <netinet6/nd6.h> 141 #endif 142 143 #ifdef NS 144 #include <netns/ns.h> 145 #include <netns/ns_if.h> 146 #endif 147 148 #ifdef IPX 149 #include <netipx/ipx.h> 150 #include <netipx/ipx_if.h> 151 #endif 152 153 #ifdef ISO 154 #include <netiso/argo_debug.h> 155 #include <netiso/iso.h> 156 #include <netiso/iso_var.h> 157 #include <netiso/iso_snpac.h> 158 #endif 159 160 #ifdef LLC 161 #include <netccitt/dll.h> 162 #include <netccitt/llc_var.h> 163 #endif 164 165 #if defined(LLC) && defined(CCITT) 166 extern struct ifqueue pkintrq; 167 #endif 168 169 #ifdef NETATALK 170 #include <netatalk/at.h> 171 #include <netatalk/at_var.h> 172 #include <netatalk/at_extern.h> 173 174 #define llc_snap_org_code llc_un.type_snap.org_code 175 #define llc_snap_ether_type llc_un.type_snap.ether_type 176 177 extern u_char at_org_code[3]; 178 extern u_char aarp_org_code[3]; 179 #endif /* NETATALK */ 180 181 u_char etherbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 182 #define senderr(e) { error = (e); goto bad;} 183 184 #define SIN(x) ((struct sockaddr_in *)x) 185 186 static int ether_output __P((struct ifnet *, struct mbuf *, 187 struct sockaddr *, struct rtentry *)); 188 static void ether_input __P((struct ifnet *, struct mbuf *)); 189 190 /* 191 * Ethernet output routine. 192 * Encapsulate a packet of type family for the local net. 193 * Assumes that ifp is actually pointer to ethercom structure. 194 */ 195 static int 196 ether_output(struct ifnet *ifp, struct mbuf *m0, struct sockaddr *dst, 197 struct rtentry *rt0) 198 { 199 u_int16_t etype = 0; 200 int s, len, error = 0, hdrcmplt = 0; 201 u_char esrc[6], edst[6]; 202 struct mbuf *m = m0; 203 struct rtentry *rt; 204 struct mbuf *mcopy = (struct mbuf *)0; 205 struct ether_header *eh; 206 ALTQ_DECL(struct altq_pktattr pktattr;) 207 #ifdef INET 208 struct arphdr *ah; 209 #endif /* INET */ 210 #ifdef NETATALK 211 struct at_ifaddr *aa; 212 #endif /* NETATALK */ 213 short mflags; 214 215 #ifdef MBUFTRACE 216 m_claim(m, ifp->if_mowner); 217 #endif 218 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 219 senderr(ENETDOWN); 220 if ((rt = rt0) != NULL) { 221 if ((rt->rt_flags & RTF_UP) == 0) { 222 if ((rt0 = rt = rtalloc1(dst, 1)) != NULL) { 223 rt->rt_refcnt--; 224 if (rt->rt_ifp != ifp) 225 return (*rt->rt_ifp->if_output) 226 (ifp, m0, dst, rt); 227 } else 228 senderr(EHOSTUNREACH); 229 } 230 if ((rt->rt_flags & RTF_GATEWAY) && dst->sa_family != AF_NS) { 231 if (rt->rt_gwroute == 0) 232 goto lookup; 233 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 234 rtfree(rt); rt = rt0; 235 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1); 236 if ((rt = rt->rt_gwroute) == 0) 237 senderr(EHOSTUNREACH); 238 /* the "G" test below also prevents rt == rt0 */ 239 if ((rt->rt_flags & RTF_GATEWAY) || 240 (rt->rt_ifp != ifp)) { 241 rt->rt_refcnt--; 242 rt0->rt_gwroute = 0; 243 senderr(EHOSTUNREACH); 244 } 245 } 246 } 247 if (rt->rt_flags & RTF_REJECT) 248 if (rt->rt_rmx.rmx_expire == 0 || 249 (u_long) time.tv_sec < rt->rt_rmx.rmx_expire) 250 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 251 } 252 253 switch (dst->sa_family) { 254 255 #ifdef INET 256 case AF_INET: 257 if (m->m_flags & M_BCAST) 258 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 259 sizeof(edst)); 260 261 else if (m->m_flags & M_MCAST) { 262 ETHER_MAP_IP_MULTICAST(&SIN(dst)->sin_addr, 263 (caddr_t)edst) 264 265 } else if (!arpresolve(ifp, rt, m, dst, edst)) 266 return (0); /* if not yet resolved */ 267 /* If broadcasting on a simplex interface, loopback a copy */ 268 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 269 mcopy = m_copy(m, 0, (int)M_COPYALL); 270 etype = htons(ETHERTYPE_IP); 271 break; 272 273 case AF_ARP: 274 ah = mtod(m, struct arphdr *); 275 if (m->m_flags & M_BCAST) 276 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 277 sizeof(edst)); 278 else 279 bcopy((caddr_t)ar_tha(ah), 280 (caddr_t)edst, sizeof(edst)); 281 282 ah->ar_hrd = htons(ARPHRD_ETHER); 283 284 switch(ntohs(ah->ar_op)) { 285 case ARPOP_REVREQUEST: 286 case ARPOP_REVREPLY: 287 etype = htons(ETHERTYPE_REVARP); 288 break; 289 290 case ARPOP_REQUEST: 291 case ARPOP_REPLY: 292 default: 293 etype = htons(ETHERTYPE_ARP); 294 } 295 296 break; 297 #endif 298 #ifdef INET6 299 case AF_INET6: 300 if (!nd6_storelladdr(ifp, rt, m, dst, (u_char *)edst)){ 301 /* something bad happened */ 302 return (0); 303 } 304 etype = htons(ETHERTYPE_IPV6); 305 break; 306 #endif 307 #ifdef NETATALK 308 case AF_APPLETALK: 309 if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) { 310 #ifdef NETATALKDEBUG 311 printf("aarpresolv failed\n"); 312 #endif /* NETATALKDEBUG */ 313 return (0); 314 } 315 /* 316 * ifaddr is the first thing in at_ifaddr 317 */ 318 aa = (struct at_ifaddr *) at_ifawithnet( 319 (struct sockaddr_at *)dst, ifp); 320 if (aa == NULL) 321 goto bad; 322 323 /* 324 * In the phase 2 case, we need to prepend an mbuf for the 325 * llc header. Since we must preserve the value of m, 326 * which is passed to us by value, we m_copy() the first 327 * mbuf, and use it for our llc header. 328 */ 329 if (aa->aa_flags & AFA_PHASE2) { 330 struct llc llc; 331 332 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 333 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 334 llc.llc_control = LLC_UI; 335 bcopy(at_org_code, llc.llc_snap_org_code, 336 sizeof(llc.llc_snap_org_code)); 337 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 338 bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc)); 339 } else { 340 etype = htons(ETHERTYPE_ATALK); 341 } 342 break; 343 #endif /* NETATALK */ 344 #ifdef NS 345 case AF_NS: 346 etype = htons(ETHERTYPE_NS); 347 bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host), 348 (caddr_t)edst, sizeof (edst)); 349 if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst))) 350 return (looutput(ifp, m, dst, rt)); 351 /* If broadcasting on a simplex interface, loopback a copy */ 352 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 353 mcopy = m_copy(m, 0, (int)M_COPYALL); 354 break; 355 #endif 356 #ifdef IPX 357 case AF_IPX: 358 etype = htons(ETHERTYPE_IPX); 359 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 360 (caddr_t)edst, sizeof (edst)); 361 /* If broadcasting on a simplex interface, loopback a copy */ 362 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 363 mcopy = m_copy(m, 0, (int)M_COPYALL); 364 break; 365 #endif 366 #ifdef ISO 367 case AF_ISO: { 368 int snpalen; 369 struct llc *l; 370 struct sockaddr_dl *sdl; 371 372 if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) && 373 sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) { 374 bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst)); 375 } else { 376 error = iso_snparesolve(ifp, (struct sockaddr_iso *)dst, 377 (char *)edst, &snpalen); 378 if (error) 379 goto bad; /* Not Resolved */ 380 } 381 /* If broadcasting on a simplex interface, loopback a copy */ 382 if (*edst & 1) 383 m->m_flags |= (M_BCAST|M_MCAST); 384 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) && 385 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 386 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 387 if (mcopy) { 388 eh = mtod(mcopy, struct ether_header *); 389 bcopy((caddr_t)edst, 390 (caddr_t)eh->ether_dhost, sizeof (edst)); 391 bcopy(LLADDR(ifp->if_sadl), 392 (caddr_t)eh->ether_shost, sizeof (edst)); 393 } 394 } 395 M_PREPEND(m, 3, M_DONTWAIT); 396 if (m == NULL) 397 return (0); 398 l = mtod(m, struct llc *); 399 l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP; 400 l->llc_control = LLC_UI; 401 #ifdef ARGO_DEBUG 402 if (argo_debug[D_ETHER]) { 403 int i; 404 printf("unoutput: sending pkt to: "); 405 for (i=0; i<6; i++) 406 printf("%x ", edst[i] & 0xff); 407 printf("\n"); 408 } 409 #endif 410 } break; 411 #endif /* ISO */ 412 #ifdef LLC 413 /* case AF_NSAP: */ 414 case AF_CCITT: { 415 struct sockaddr_dl *sdl = 416 (struct sockaddr_dl *) rt -> rt_gateway; 417 418 if (sdl && sdl->sdl_family == AF_LINK 419 && sdl->sdl_alen > 0) { 420 bcopy(LLADDR(sdl), (char *)edst, 421 sizeof(edst)); 422 } else goto bad; /* Not a link interface ? Funny ... */ 423 if ((ifp->if_flags & IFF_SIMPLEX) && (*edst & 1) && 424 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 425 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 426 if (mcopy) { 427 eh = mtod(mcopy, struct ether_header *); 428 bcopy((caddr_t)edst, 429 (caddr_t)eh->ether_dhost, sizeof (edst)); 430 bcopy(LLADDR(ifp->if_sadl), 431 (caddr_t)eh->ether_shost, sizeof (edst)); 432 } 433 } 434 #ifdef LLC_DEBUG 435 { 436 int i; 437 struct llc *l = mtod(m, struct llc *); 438 439 printf("ether_output: sending LLC2 pkt to: "); 440 for (i=0; i<6; i++) 441 printf("%x ", edst[i] & 0xff); 442 printf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n", 443 m->m_pkthdr.len, l->llc_dsap & 0xff, l->llc_ssap &0xff, 444 l->llc_control & 0xff); 445 446 } 447 #endif /* LLC_DEBUG */ 448 } break; 449 #endif /* LLC */ 450 451 case pseudo_AF_HDRCMPLT: 452 hdrcmplt = 1; 453 eh = (struct ether_header *)dst->sa_data; 454 bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, sizeof (esrc)); 455 /* FALLTHROUGH */ 456 457 case AF_UNSPEC: 458 eh = (struct ether_header *)dst->sa_data; 459 bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, sizeof (edst)); 460 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 461 etype = eh->ether_type; 462 break; 463 464 default: 465 printf("%s: can't handle af%d\n", ifp->if_xname, 466 dst->sa_family); 467 senderr(EAFNOSUPPORT); 468 } 469 470 if (mcopy) 471 (void) looutput(ifp, mcopy, dst, rt); 472 473 /* If no ether type is set, this must be a 802.2 formatted packet. 474 */ 475 if (etype == 0) 476 etype = htons(m->m_pkthdr.len); 477 /* 478 * Add local net header. If no space in first mbuf, 479 * allocate another. 480 */ 481 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 482 if (m == 0) 483 senderr(ENOBUFS); 484 eh = mtod(m, struct ether_header *); 485 /* Note: etype is already in network byte order. */ 486 #ifdef __NO_STRICT_ALIGNMENT 487 eh->ether_type = etype; 488 #else 489 { 490 uint8_t *dstp = (uint8_t *) &eh->ether_type; 491 #if BYTE_ORDER == BIG_ENDIAN 492 dstp[0] = etype >> 8; 493 dstp[1] = etype; 494 #else 495 dstp[0] = etype; 496 dstp[1] = etype >> 8; 497 #endif /* BYTE_ORDER == BIG_ENDIAN */ 498 } 499 #endif /* __NO_STRICT_ALIGNMENT */ 500 bcopy((caddr_t)edst, (caddr_t)eh->ether_dhost, sizeof (edst)); 501 if (hdrcmplt) 502 bcopy((caddr_t)esrc, (caddr_t)eh->ether_shost, 503 sizeof(eh->ether_shost)); 504 else 505 bcopy(LLADDR(ifp->if_sadl), (caddr_t)eh->ether_shost, 506 sizeof(eh->ether_shost)); 507 508 #ifdef PFIL_HOOKS 509 if ((error = pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 510 return (error); 511 if (m == NULL) 512 return (0); 513 #endif 514 515 #if NBRIDGE > 0 516 /* 517 * Bridges require special output handling. 518 */ 519 if (ifp->if_bridge) 520 return (bridge_output(ifp, m, NULL, NULL)); 521 #endif 522 523 #ifdef ALTQ 524 /* 525 * If ALTQ is enabled on the parent interface, do 526 * classification; the queueing discipline might not 527 * require classification, but might require the 528 * address family/header pointer in the pktattr. 529 */ 530 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 531 altq_etherclassify(&ifp->if_snd, m, &pktattr); 532 #endif 533 534 mflags = m->m_flags; 535 len = m->m_pkthdr.len; 536 s = splnet(); 537 /* 538 * Queue message on interface, and start output if interface 539 * not yet active. 540 */ 541 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, error); 542 if (error) { 543 /* mbuf is already freed */ 544 splx(s); 545 return (error); 546 } 547 ifp->if_obytes += len; 548 if (mflags & M_MCAST) 549 ifp->if_omcasts++; 550 if ((ifp->if_flags & IFF_OACTIVE) == 0) 551 (*ifp->if_start)(ifp); 552 splx(s); 553 return (error); 554 555 bad: 556 if (m) 557 m_freem(m); 558 return (error); 559 } 560 561 #ifdef ALTQ 562 /* 563 * This routine is a slight hack to allow a packet to be classified 564 * if the Ethernet headers are present. It will go away when ALTQ's 565 * classification engine understands link headers. 566 */ 567 void 568 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m, 569 struct altq_pktattr *pktattr) 570 { 571 struct ether_header *eh; 572 u_int16_t ether_type; 573 int hlen, af, hdrsize; 574 caddr_t hdr; 575 576 hlen = ETHER_HDR_LEN; 577 eh = mtod(m, struct ether_header *); 578 579 ether_type = htons(eh->ether_type); 580 581 if (ether_type < ETHERMTU) { 582 /* LLC/SNAP */ 583 struct llc *llc = (struct llc *)(eh + 1); 584 hlen += 8; 585 586 if (m->m_len < hlen || 587 llc->llc_dsap != LLC_SNAP_LSAP || 588 llc->llc_ssap != LLC_SNAP_LSAP || 589 llc->llc_control != LLC_UI) { 590 /* Not SNAP. */ 591 goto bad; 592 } 593 594 ether_type = htons(llc->llc_un.type_snap.ether_type); 595 } 596 597 switch (ether_type) { 598 case ETHERTYPE_IP: 599 af = AF_INET; 600 hdrsize = 20; /* sizeof(struct ip) */ 601 break; 602 603 case ETHERTYPE_IPV6: 604 af = AF_INET6; 605 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 606 break; 607 608 default: 609 af = AF_UNSPEC; 610 hdrsize = 0; 611 break; 612 } 613 614 while (m->m_len <= hlen) { 615 hlen -= m->m_len; 616 m = m->m_next; 617 } 618 if (m->m_len < (hlen + hdrsize)) { 619 /* 620 * protocol header not in a single mbuf. 621 * We can't cope with this situation right 622 * now (but it shouldn't ever happen, really, anyhow). 623 */ 624 #ifdef DEBUG 625 printf("altq_etherclassify: headers span multiple mbufs: " 626 "%d < %d\n", m->m_len, (hlen + hdrsize)); 627 #endif 628 goto bad; 629 } 630 631 m->m_data += hlen; 632 m->m_len -= hlen; 633 634 hdr = mtod(m, caddr_t); 635 636 if (ALTQ_NEEDS_CLASSIFY(ifq)) 637 pktattr->pattr_class = 638 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 639 pktattr->pattr_af = af; 640 pktattr->pattr_hdr = hdr; 641 642 m->m_data -= hlen; 643 m->m_len += hlen; 644 645 return; 646 647 bad: 648 pktattr->pattr_class = NULL; 649 pktattr->pattr_hdr = NULL; 650 pktattr->pattr_af = AF_UNSPEC; 651 } 652 #endif /* ALTQ */ 653 654 /* 655 * Process a received Ethernet packet; 656 * the packet is in the mbuf chain m with 657 * the ether header. 658 */ 659 static void 660 ether_input(struct ifnet *ifp, struct mbuf *m) 661 { 662 struct ethercom *ec = (struct ethercom *) ifp; 663 struct ifqueue *inq; 664 u_int16_t etype; 665 int s; 666 struct ether_header *eh; 667 struct m_tag *mtag; 668 #if defined (ISO) || defined (LLC) || defined(NETATALK) 669 struct llc *l; 670 #endif 671 672 if ((ifp->if_flags & IFF_UP) == 0) { 673 m_freem(m); 674 return; 675 } 676 677 #ifdef MBUFTRACE 678 m_claim(m, &ec->ec_rx_mowner); 679 #endif 680 eh = mtod(m, struct ether_header *); 681 etype = ntohs(eh->ether_type); 682 683 /* 684 * Determine if the packet is within its size limits. 685 */ 686 if (m->m_pkthdr.len > 687 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 688 printf("%s: discarding oversize frame (len=%d)\n", 689 ifp->if_xname, m->m_pkthdr.len); 690 m_freem(m); 691 return; 692 } 693 694 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 695 /* 696 * If this is not a simplex interface, drop the packet 697 * if it came from us. 698 */ 699 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 700 memcmp(LLADDR(ifp->if_sadl), eh->ether_shost, 701 ETHER_ADDR_LEN) == 0) { 702 m_freem(m); 703 return; 704 } 705 706 if (memcmp(etherbroadcastaddr, 707 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 708 m->m_flags |= M_BCAST; 709 else 710 m->m_flags |= M_MCAST; 711 ifp->if_imcasts++; 712 } 713 714 /* If the CRC is still on the packet, trim it off. */ 715 if (m->m_flags & M_HASFCS) { 716 m_adj(m, -ETHER_CRC_LEN); 717 m->m_flags &= ~M_HASFCS; 718 } 719 720 ifp->if_ibytes += m->m_pkthdr.len; 721 722 #if NBRIDGE > 0 723 /* 724 * Tap the packet off here for a bridge. bridge_input() 725 * will return NULL if it has consumed the packet, otherwise 726 * it gets processed as normal. Note that bridge_input() 727 * will always return the original packet if we need to 728 * process it locally. 729 */ 730 if (ifp->if_bridge) { 731 m = bridge_input(ifp, m); 732 if (m == NULL) 733 return; 734 735 /* 736 * Bridge has determined that the packet is for us. 737 * Update our interface pointer -- we may have had 738 * to "bridge" the packet locally. 739 */ 740 ifp = m->m_pkthdr.rcvif; 741 } 742 #endif /* NBRIDGE > 0 */ 743 744 /* 745 * XXX This comparison is redundant if we are a bridge 746 * XXX and processing the packet locally. 747 */ 748 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0 && 749 (ifp->if_flags & IFF_PROMISC) != 0 && 750 memcmp(LLADDR(ifp->if_sadl), eh->ether_dhost, 751 ETHER_ADDR_LEN) != 0) { 752 m_freem(m); 753 return; 754 } 755 756 #ifdef PFIL_HOOKS 757 if (pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 758 return; 759 if (m == NULL) 760 return; 761 762 eh = mtod(m, struct ether_header *); 763 etype = ntohs(eh->ether_type); 764 #endif 765 766 /* 767 * If VLANs are configured on the interface, check to 768 * see if the device performed the decapsulation and 769 * provided us with the tag. 770 */ 771 if (ec->ec_nvlans && 772 (mtag = m_tag_find(m, PACKET_TAG_VLAN, NULL)) != NULL) { 773 #if NVLAN > 0 774 /* 775 * vlan_input() will either recursively call ether_input() 776 * or drop the packet. 777 */ 778 vlan_input(ifp, m); 779 #else 780 m_freem(m); 781 #endif 782 return; 783 } 784 785 /* 786 * Handle protocols that expect to have the Ethernet header 787 * (and possibly FCS) intact. 788 */ 789 switch (etype) { 790 #if NVLAN > 0 791 case ETHERTYPE_VLAN: 792 /* 793 * vlan_input() will either recursively call ether_input() 794 * or drop the packet. 795 */ 796 if (((struct ethercom *)ifp)->ec_nvlans != 0) 797 vlan_input(ifp, m); 798 else 799 m_freem(m); 800 return; 801 #endif /* NVLAN > 0 */ 802 #if NPPPOE > 0 803 case ETHERTYPE_PPPOEDISC: 804 case ETHERTYPE_PPPOE: 805 if (etype == ETHERTYPE_PPPOEDISC) 806 inq = &ppoediscinq; 807 else 808 inq = &ppoeinq; 809 s = splnet(); 810 if (IF_QFULL(inq)) { 811 IF_DROP(inq); 812 m_freem(m); 813 } else 814 IF_ENQUEUE(inq, m); 815 splx(s); 816 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 817 if (!callout_pending(&pppoe_softintr)) 818 callout_reset(&pppoe_softintr, 1, pppoe_softintr_handler, NULL); 819 #else 820 softintr_schedule(pppoe_softintr); 821 #endif 822 return; 823 #endif /* NPPPOE > 0 */ 824 default: 825 ; /* Nothing. */ 826 } 827 828 /* Strip off the Ethernet header. */ 829 m_adj(m, sizeof(struct ether_header)); 830 831 /* If the CRC is still on the packet, trim it off. */ 832 if (m->m_flags & M_HASFCS) { 833 m_adj(m, -ETHER_CRC_LEN); 834 m->m_flags &= ~M_HASFCS; 835 } 836 837 switch (etype) { 838 #ifdef INET 839 case ETHERTYPE_IP: 840 #ifdef GATEWAY 841 if (ipflow_fastforward(m)) 842 return; 843 #endif 844 schednetisr(NETISR_IP); 845 inq = &ipintrq; 846 break; 847 848 case ETHERTYPE_ARP: 849 schednetisr(NETISR_ARP); 850 inq = &arpintrq; 851 break; 852 853 case ETHERTYPE_REVARP: 854 revarpinput(m); /* XXX queue? */ 855 return; 856 #endif 857 #ifdef INET6 858 case ETHERTYPE_IPV6: 859 schednetisr(NETISR_IPV6); 860 inq = &ip6intrq; 861 break; 862 #endif 863 #ifdef NS 864 case ETHERTYPE_NS: 865 schednetisr(NETISR_NS); 866 inq = &nsintrq; 867 break; 868 869 #endif 870 #ifdef IPX 871 case ETHERTYPE_IPX: 872 schednetisr(NETISR_IPX); 873 inq = &ipxintrq; 874 break; 875 #endif 876 #ifdef NETATALK 877 case ETHERTYPE_ATALK: 878 schednetisr(NETISR_ATALK); 879 inq = &atintrq1; 880 break; 881 case ETHERTYPE_AARP: 882 /* probably this should be done with a NETISR as well */ 883 aarpinput(ifp, m); /* XXX */ 884 return; 885 #endif /* NETATALK */ 886 default: 887 #if defined (ISO) || defined (LLC) || defined (NETATALK) 888 if (etype > ETHERMTU) 889 goto dropanyway; 890 l = mtod(m, struct llc *); 891 switch (l->llc_dsap) { 892 #ifdef NETATALK 893 case LLC_SNAP_LSAP: 894 switch (l->llc_control) { 895 case LLC_UI: 896 if (l->llc_ssap != LLC_SNAP_LSAP) { 897 goto dropanyway; 898 } 899 900 if (Bcmp(&(l->llc_snap_org_code)[0], 901 at_org_code, sizeof(at_org_code)) == 0 && 902 ntohs(l->llc_snap_ether_type) == 903 ETHERTYPE_ATALK) { 904 inq = &atintrq2; 905 m_adj(m, sizeof(struct llc)); 906 schednetisr(NETISR_ATALK); 907 break; 908 } 909 910 if (Bcmp(&(l->llc_snap_org_code)[0], 911 aarp_org_code, 912 sizeof(aarp_org_code)) == 0 && 913 ntohs(l->llc_snap_ether_type) == 914 ETHERTYPE_AARP) { 915 m_adj( m, sizeof(struct llc)); 916 aarpinput(ifp, m); /* XXX */ 917 return; 918 } 919 920 default: 921 goto dropanyway; 922 } 923 break; 924 #endif /* NETATALK */ 925 #ifdef ISO 926 case LLC_ISO_LSAP: 927 switch (l->llc_control) { 928 case LLC_UI: 929 /* LLC_UI_P forbidden in class 1 service */ 930 if ((l->llc_dsap == LLC_ISO_LSAP) && 931 (l->llc_ssap == LLC_ISO_LSAP)) { 932 /* LSAP for ISO */ 933 if (m->m_pkthdr.len > etype) 934 m_adj(m, etype - m->m_pkthdr.len); 935 m->m_data += 3; /* XXX */ 936 m->m_len -= 3; /* XXX */ 937 m->m_pkthdr.len -= 3; /* XXX */ 938 M_PREPEND(m, sizeof *eh, M_DONTWAIT); 939 if (m == 0) 940 return; 941 *mtod(m, struct ether_header *) = *eh; 942 #ifdef ARGO_DEBUG 943 if (argo_debug[D_ETHER]) 944 printf("clnp packet"); 945 #endif 946 schednetisr(NETISR_ISO); 947 inq = &clnlintrq; 948 break; 949 } 950 goto dropanyway; 951 952 case LLC_XID: 953 case LLC_XID_P: 954 if(m->m_len < 6) 955 goto dropanyway; 956 l->llc_window = 0; 957 l->llc_fid = 9; 958 l->llc_class = 1; 959 l->llc_dsap = l->llc_ssap = 0; 960 /* Fall through to */ 961 case LLC_TEST: 962 case LLC_TEST_P: 963 { 964 struct sockaddr sa; 965 struct ether_header *eh2; 966 int i; 967 u_char c = l->llc_dsap; 968 969 l->llc_dsap = l->llc_ssap; 970 l->llc_ssap = c; 971 if (m->m_flags & (M_BCAST | M_MCAST)) 972 bcopy(LLADDR(ifp->if_sadl), 973 (caddr_t)eh->ether_dhost, 6); 974 sa.sa_family = AF_UNSPEC; 975 sa.sa_len = sizeof(sa); 976 eh2 = (struct ether_header *)sa.sa_data; 977 for (i = 0; i < 6; i++) { 978 eh2->ether_shost[i] = c = 979 eh->ether_dhost[i]; 980 eh2->ether_dhost[i] = 981 eh->ether_dhost[i] = 982 eh->ether_shost[i]; 983 eh->ether_shost[i] = c; 984 } 985 ifp->if_output(ifp, m, &sa, NULL); 986 return; 987 } 988 default: 989 m_freem(m); 990 return; 991 } 992 break; 993 #endif /* ISO */ 994 #ifdef LLC 995 case LLC_X25_LSAP: 996 { 997 if (m->m_pkthdr.len > etype) 998 m_adj(m, etype - m->m_pkthdr.len); 999 M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT); 1000 if (m == 0) 1001 return; 1002 if ( !sdl_sethdrif(ifp, eh->ether_shost, LLC_X25_LSAP, 1003 eh->ether_dhost, LLC_X25_LSAP, 6, 1004 mtod(m, struct sdl_hdr *))) 1005 panic("ETHER cons addr failure"); 1006 mtod(m, struct sdl_hdr *)->sdlhdr_len = etype; 1007 #ifdef LLC_DEBUG 1008 printf("llc packet\n"); 1009 #endif /* LLC_DEBUG */ 1010 schednetisr(NETISR_CCITT); 1011 inq = &llcintrq; 1012 break; 1013 } 1014 #endif /* LLC */ 1015 dropanyway: 1016 default: 1017 m_freem(m); 1018 return; 1019 } 1020 #else /* ISO || LLC || NETATALK*/ 1021 m_freem(m); 1022 return; 1023 #endif /* ISO || LLC || NETATALK*/ 1024 } 1025 1026 s = splnet(); 1027 if (IF_QFULL(inq)) { 1028 IF_DROP(inq); 1029 m_freem(m); 1030 } else 1031 IF_ENQUEUE(inq, m); 1032 splx(s); 1033 } 1034 1035 /* 1036 * Convert Ethernet address to printable (loggable) representation. 1037 */ 1038 static char digits[] = "0123456789abcdef"; 1039 char * 1040 ether_sprintf(const u_char *ap) 1041 { 1042 static char etherbuf[18]; 1043 char *cp = etherbuf; 1044 int i; 1045 1046 for (i = 0; i < 6; i++) { 1047 *cp++ = digits[*ap >> 4]; 1048 *cp++ = digits[*ap++ & 0xf]; 1049 *cp++ = ':'; 1050 } 1051 *--cp = 0; 1052 return (etherbuf); 1053 } 1054 1055 /* 1056 * Perform common duties while attaching to interface list 1057 */ 1058 void 1059 ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 1060 { 1061 struct ethercom *ec = (struct ethercom *)ifp; 1062 1063 ifp->if_type = IFT_ETHER; 1064 ifp->if_addrlen = ETHER_ADDR_LEN; 1065 ifp->if_hdrlen = ETHER_HDR_LEN; 1066 ifp->if_dlt = DLT_EN10MB; 1067 ifp->if_mtu = ETHERMTU; 1068 ifp->if_output = ether_output; 1069 ifp->if_input = ether_input; 1070 if (ifp->if_baudrate == 0) 1071 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 1072 1073 if_alloc_sadl(ifp); 1074 memcpy(LLADDR(ifp->if_sadl), lla, ifp->if_addrlen); 1075 1076 LIST_INIT(&ec->ec_multiaddrs); 1077 ifp->if_broadcastaddr = etherbroadcastaddr; 1078 #if NBPFILTER > 0 1079 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 1080 #endif 1081 #ifdef MBUFTRACE 1082 strcpy(ec->ec_tx_mowner.mo_name, ifp->if_xname); 1083 strcpy(ec->ec_tx_mowner.mo_descr, "tx"); 1084 strcpy(ec->ec_rx_mowner.mo_name, ifp->if_xname); 1085 strcpy(ec->ec_rx_mowner.mo_descr, "rx"); 1086 MOWNER_ATTACH(&ec->ec_tx_mowner); 1087 MOWNER_ATTACH(&ec->ec_rx_mowner); 1088 ifp->if_mowner = &ec->ec_tx_mowner; 1089 #endif 1090 } 1091 1092 void 1093 ether_ifdetach(struct ifnet *ifp) 1094 { 1095 struct ethercom *ec = (void *) ifp; 1096 struct ether_multi *enm; 1097 int s; 1098 1099 #if NBPFILTER > 0 1100 bpfdetach(ifp); 1101 #endif 1102 1103 #if NVLAN > 0 1104 if (ec->ec_nvlans) 1105 vlan_ifdetach(ifp); 1106 #endif 1107 1108 s = splnet(); 1109 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1110 LIST_REMOVE(enm, enm_list); 1111 free(enm, M_IFMADDR); 1112 ec->ec_multicnt--; 1113 } 1114 splx(s); 1115 1116 if_free_sadl(ifp); 1117 1118 MOWNER_DETACH(&ec->ec_rx_mowner); 1119 MOWNER_DETACH(&ec->ec_tx_mowner); 1120 } 1121 1122 #if 0 1123 /* 1124 * This is for reference. We have a table-driven version 1125 * of the little-endian crc32 generator, which is faster 1126 * than the double-loop. 1127 */ 1128 u_int32_t 1129 ether_crc32_le(const u_int8_t *buf, size_t len) 1130 { 1131 u_int32_t c, crc, carry; 1132 size_t i, j; 1133 1134 crc = 0xffffffffU; /* initial value */ 1135 1136 for (i = 0; i < len; i++) { 1137 c = buf[i]; 1138 for (j = 0; j < 8; j++) { 1139 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1140 crc >>= 1; 1141 c >>= 1; 1142 if (carry) 1143 crc = (crc ^ ETHER_CRC_POLY_LE); 1144 } 1145 } 1146 1147 return (crc); 1148 } 1149 #else 1150 u_int32_t 1151 ether_crc32_le(const u_int8_t *buf, size_t len) 1152 { 1153 static const u_int32_t crctab[] = { 1154 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1155 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1156 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1157 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1158 }; 1159 u_int32_t crc; 1160 size_t i; 1161 1162 crc = 0xffffffffU; /* initial value */ 1163 1164 for (i = 0; i < len; i++) { 1165 crc ^= buf[i]; 1166 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1167 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1168 } 1169 1170 return (crc); 1171 } 1172 #endif 1173 1174 u_int32_t 1175 ether_crc32_be(const u_int8_t *buf, size_t len) 1176 { 1177 u_int32_t c, crc, carry; 1178 size_t i, j; 1179 1180 crc = 0xffffffffU; /* initial value */ 1181 1182 for (i = 0; i < len; i++) { 1183 c = buf[i]; 1184 for (j = 0; j < 8; j++) { 1185 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1186 crc <<= 1; 1187 c >>= 1; 1188 if (carry) 1189 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1190 } 1191 } 1192 1193 return (crc); 1194 } 1195 1196 #ifdef INET 1197 u_char ether_ipmulticast_min[6] = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1198 u_char ether_ipmulticast_max[6] = { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1199 #endif 1200 #ifdef INET6 1201 u_char ether_ip6multicast_min[6] = { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1202 u_char ether_ip6multicast_max[6] = { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1203 #endif 1204 1205 /* 1206 * Convert a sockaddr into an Ethernet address or range of Ethernet 1207 * addresses. 1208 */ 1209 int 1210 ether_multiaddr(struct sockaddr *sa, u_int8_t addrlo[ETHER_ADDR_LEN], 1211 u_int8_t addrhi[ETHER_ADDR_LEN]) 1212 { 1213 #ifdef INET 1214 struct sockaddr_in *sin; 1215 #endif /* INET */ 1216 #ifdef INET6 1217 struct sockaddr_in6 *sin6; 1218 #endif /* INET6 */ 1219 1220 switch (sa->sa_family) { 1221 1222 case AF_UNSPEC: 1223 bcopy(sa->sa_data, addrlo, ETHER_ADDR_LEN); 1224 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1225 break; 1226 1227 #ifdef INET 1228 case AF_INET: 1229 sin = satosin(sa); 1230 if (sin->sin_addr.s_addr == INADDR_ANY) { 1231 /* 1232 * An IP address of INADDR_ANY means listen to 1233 * or stop listening to all of the Ethernet 1234 * multicast addresses used for IP. 1235 * (This is for the sake of IP multicast routers.) 1236 */ 1237 bcopy(ether_ipmulticast_min, addrlo, ETHER_ADDR_LEN); 1238 bcopy(ether_ipmulticast_max, addrhi, ETHER_ADDR_LEN); 1239 } 1240 else { 1241 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1242 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1243 } 1244 break; 1245 #endif 1246 #ifdef INET6 1247 case AF_INET6: 1248 sin6 = satosin6(sa); 1249 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1250 /* 1251 * An IP6 address of 0 means listen to or stop 1252 * listening to all of the Ethernet multicast 1253 * address used for IP6. 1254 * (This is used for multicast routers.) 1255 */ 1256 bcopy(ether_ip6multicast_min, addrlo, ETHER_ADDR_LEN); 1257 bcopy(ether_ip6multicast_max, addrhi, ETHER_ADDR_LEN); 1258 } else { 1259 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1260 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1261 } 1262 break; 1263 #endif 1264 1265 default: 1266 return (EAFNOSUPPORT); 1267 } 1268 return (0); 1269 } 1270 1271 /* 1272 * Add an Ethernet multicast address or range of addresses to the list for a 1273 * given interface. 1274 */ 1275 int 1276 ether_addmulti(struct ifreq *ifr, struct ethercom *ec) 1277 { 1278 struct ether_multi *enm; 1279 u_char addrlo[ETHER_ADDR_LEN]; 1280 u_char addrhi[ETHER_ADDR_LEN]; 1281 int s = splnet(), error; 1282 1283 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1284 if (error != 0) { 1285 splx(s); 1286 return (error); 1287 } 1288 1289 /* 1290 * Verify that we have valid Ethernet multicast addresses. 1291 */ 1292 if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) { 1293 splx(s); 1294 return (EINVAL); 1295 } 1296 /* 1297 * See if the address range is already in the list. 1298 */ 1299 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1300 if (enm != NULL) { 1301 /* 1302 * Found it; just increment the reference count. 1303 */ 1304 ++enm->enm_refcount; 1305 splx(s); 1306 return (0); 1307 } 1308 /* 1309 * New address or range; malloc a new multicast record 1310 * and link it into the interface's multicast list. 1311 */ 1312 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1313 if (enm == NULL) { 1314 splx(s); 1315 return (ENOBUFS); 1316 } 1317 bcopy(addrlo, enm->enm_addrlo, 6); 1318 bcopy(addrhi, enm->enm_addrhi, 6); 1319 enm->enm_ec = ec; 1320 enm->enm_refcount = 1; 1321 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1322 ec->ec_multicnt++; 1323 splx(s); 1324 /* 1325 * Return ENETRESET to inform the driver that the list has changed 1326 * and its reception filter should be adjusted accordingly. 1327 */ 1328 return (ENETRESET); 1329 } 1330 1331 /* 1332 * Delete a multicast address record. 1333 */ 1334 int 1335 ether_delmulti(struct ifreq *ifr, struct ethercom *ec) 1336 { 1337 struct ether_multi *enm; 1338 u_char addrlo[ETHER_ADDR_LEN]; 1339 u_char addrhi[ETHER_ADDR_LEN]; 1340 int s = splnet(), error; 1341 1342 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1343 if (error != 0) { 1344 splx(s); 1345 return (error); 1346 } 1347 1348 /* 1349 * Look ur the address in our list. 1350 */ 1351 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1352 if (enm == NULL) { 1353 splx(s); 1354 return (ENXIO); 1355 } 1356 if (--enm->enm_refcount != 0) { 1357 /* 1358 * Still some claims to this record. 1359 */ 1360 splx(s); 1361 return (0); 1362 } 1363 /* 1364 * No remaining claims to this record; unlink and free it. 1365 */ 1366 LIST_REMOVE(enm, enm_list); 1367 free(enm, M_IFMADDR); 1368 ec->ec_multicnt--; 1369 splx(s); 1370 /* 1371 * Return ENETRESET to inform the driver that the list has changed 1372 * and its reception filter should be adjusted accordingly. 1373 */ 1374 return (ENETRESET); 1375 } 1376 1377 /* 1378 * Common ioctls for Ethernet interfaces. Note, we must be 1379 * called at splnet(). 1380 */ 1381 int 1382 ether_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1383 { 1384 struct ethercom *ec = (void *) ifp; 1385 struct ifreq *ifr = (struct ifreq *)data; 1386 struct ifaddr *ifa = (struct ifaddr *)data; 1387 int error = 0; 1388 1389 switch (cmd) { 1390 case SIOCSIFADDR: 1391 ifp->if_flags |= IFF_UP; 1392 switch (ifa->ifa_addr->sa_family) { 1393 case AF_LINK: 1394 { 1395 struct sockaddr_dl *sdl = 1396 (struct sockaddr_dl *) ifa->ifa_addr; 1397 1398 if (sdl->sdl_type != IFT_ETHER || 1399 sdl->sdl_alen != ifp->if_addrlen) { 1400 error = EINVAL; 1401 break; 1402 } 1403 1404 memcpy(LLADDR(ifp->if_sadl), LLADDR(sdl), 1405 ifp->if_addrlen); 1406 1407 /* Set new address. */ 1408 error = (*ifp->if_init)(ifp); 1409 break; 1410 } 1411 #ifdef INET 1412 case AF_INET: 1413 if ((ifp->if_flags & IFF_RUNNING) == 0 && 1414 (error = (*ifp->if_init)(ifp)) != 0) 1415 break; 1416 arp_ifinit(ifp, ifa); 1417 break; 1418 #endif /* INET */ 1419 #ifdef NS 1420 case AF_NS: 1421 { 1422 struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; 1423 1424 if (ns_nullhost(*ina)) 1425 ina->x_host = *(union ns_host *) 1426 LLADDR(ifp->if_sadl); 1427 else 1428 memcpy(LLADDR(ifp->if_sadl), 1429 ina->x_host.c_host, ifp->if_addrlen); 1430 /* Set new address. */ 1431 error = (*ifp->if_init)(ifp); 1432 break; 1433 } 1434 #endif /* NS */ 1435 default: 1436 if ((ifp->if_flags & IFF_RUNNING) == 0) 1437 error = (*ifp->if_init)(ifp); 1438 break; 1439 } 1440 break; 1441 1442 case SIOCGIFADDR: 1443 memcpy(((struct sockaddr *)&ifr->ifr_data)->sa_data, 1444 LLADDR(ifp->if_sadl), ETHER_ADDR_LEN); 1445 break; 1446 1447 case SIOCSIFMTU: 1448 { 1449 int maxmtu; 1450 1451 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1452 maxmtu = ETHERMTU_JUMBO; 1453 else 1454 maxmtu = ETHERMTU; 1455 1456 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1457 error = EINVAL; 1458 else { 1459 ifp->if_mtu = ifr->ifr_mtu; 1460 1461 /* Make sure the device notices the MTU change. */ 1462 if (ifp->if_flags & IFF_UP) 1463 error = (*ifp->if_init)(ifp); 1464 } 1465 break; 1466 } 1467 1468 case SIOCSIFFLAGS: 1469 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_RUNNING) { 1470 /* 1471 * If interface is marked down and it is running, 1472 * then stop and disable it. 1473 */ 1474 (*ifp->if_stop)(ifp, 1); 1475 } else if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_UP) { 1476 /* 1477 * If interface is marked up and it is stopped, then 1478 * start it. 1479 */ 1480 error = (*ifp->if_init)(ifp); 1481 } else if ((ifp->if_flags & IFF_UP) != 0) { 1482 /* 1483 * Reset the interface to pick up changes in any other 1484 * flags that affect the hardware state. 1485 */ 1486 error = (*ifp->if_init)(ifp); 1487 } 1488 break; 1489 1490 case SIOCADDMULTI: 1491 error = ether_addmulti(ifr, ec); 1492 break; 1493 1494 case SIOCDELMULTI: 1495 error = ether_delmulti(ifr, ec); 1496 break; 1497 1498 default: 1499 error = ENOTTY; 1500 } 1501 1502 return (error); 1503 } 1504
Indexes created Mon Sep 22 13:09:51 GMT 2025