if_ethersubr.c revision 1.93
1 /* $NetBSD: if_ethersubr.c,v 1.93 2002/04/07 07:05:37 martin 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 1.93 2002/04/07 07:05:37 martin 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 realy 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 realy 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 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 216 senderr(ENETDOWN); 217 if ((rt = rt0) != NULL) { 218 if ((rt->rt_flags & RTF_UP) == 0) { 219 if ((rt0 = rt = rtalloc1(dst, 1)) != NULL) { 220 rt->rt_refcnt--; 221 if (rt->rt_ifp != ifp) 222 return (*rt->rt_ifp->if_output) 223 (ifp, m0, dst, rt); 224 } else 225 senderr(EHOSTUNREACH); 226 } 227 if ((rt->rt_flags & RTF_GATEWAY) && dst->sa_family != AF_NS) { 228 if (rt->rt_gwroute == 0) 229 goto lookup; 230 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 231 rtfree(rt); rt = rt0; 232 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1); 233 if ((rt = rt->rt_gwroute) == 0) 234 senderr(EHOSTUNREACH); 235 /* the "G" test below also prevents rt == rt0 */ 236 if ((rt->rt_flags & RTF_GATEWAY) || 237 (rt->rt_ifp != ifp)) { 238 rt->rt_refcnt--; 239 rt0->rt_gwroute = 0; 240 senderr(EHOSTUNREACH); 241 } 242 } 243 } 244 if (rt->rt_flags & RTF_REJECT) 245 if (rt->rt_rmx.rmx_expire == 0 || 246 time.tv_sec < rt->rt_rmx.rmx_expire) 247 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 248 } 249 250 switch (dst->sa_family) { 251 252 #ifdef INET 253 case AF_INET: 254 if (m->m_flags & M_BCAST) 255 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 256 sizeof(edst)); 257 258 else if (m->m_flags & M_MCAST) { 259 ETHER_MAP_IP_MULTICAST(&SIN(dst)->sin_addr, 260 (caddr_t)edst) 261 262 } else if (!arpresolve(ifp, rt, m, dst, edst)) 263 return (0); /* if not yet resolved */ 264 /* If broadcasting on a simplex interface, loopback a copy */ 265 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 266 mcopy = m_copy(m, 0, (int)M_COPYALL); 267 etype = htons(ETHERTYPE_IP); 268 break; 269 270 case AF_ARP: 271 ah = mtod(m, struct arphdr *); 272 if (m->m_flags & M_BCAST) 273 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 274 sizeof(edst)); 275 else 276 bcopy((caddr_t)ar_tha(ah), 277 (caddr_t)edst, sizeof(edst)); 278 279 ah->ar_hrd = htons(ARPHRD_ETHER); 280 281 switch(ntohs(ah->ar_op)) { 282 case ARPOP_REVREQUEST: 283 case ARPOP_REVREPLY: 284 etype = htons(ETHERTYPE_REVARP); 285 break; 286 287 case ARPOP_REQUEST: 288 case ARPOP_REPLY: 289 default: 290 etype = htons(ETHERTYPE_ARP); 291 } 292 293 break; 294 #endif 295 #ifdef INET6 296 case AF_INET6: 297 if (!nd6_storelladdr(ifp, rt, m, dst, (u_char *)edst)){ 298 /* something bad happened */ 299 return(0); 300 } 301 etype = htons(ETHERTYPE_IPV6); 302 break; 303 #endif 304 #ifdef NETATALK 305 case AF_APPLETALK: 306 if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) { 307 #ifdef NETATALKDEBUG 308 printf("aarpresolv failed\n"); 309 #endif /* NETATALKDEBUG */ 310 return (0); 311 } 312 /* 313 * ifaddr is the first thing in at_ifaddr 314 */ 315 aa = (struct at_ifaddr *) at_ifawithnet( 316 (struct sockaddr_at *)dst, ifp); 317 if (aa == NULL) 318 goto bad; 319 320 /* 321 * In the phase 2 case, we need to prepend an mbuf for the 322 * llc header. Since we must preserve the value of m, 323 * which is passed to us by value, we m_copy() the first 324 * mbuf, and use it for our llc header. 325 */ 326 if (aa->aa_flags & AFA_PHASE2) { 327 struct llc llc; 328 329 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 330 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 331 llc.llc_control = LLC_UI; 332 bcopy(at_org_code, llc.llc_snap_org_code, 333 sizeof(llc.llc_snap_org_code)); 334 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 335 bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc)); 336 } else { 337 etype = htons(ETHERTYPE_ATALK); 338 } 339 break; 340 #endif /* NETATALK */ 341 #ifdef NS 342 case AF_NS: 343 etype = htons(ETHERTYPE_NS); 344 bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host), 345 (caddr_t)edst, sizeof (edst)); 346 if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst))) 347 return (looutput(ifp, m, dst, rt)); 348 /* If broadcasting on a simplex interface, loopback a copy */ 349 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 350 mcopy = m_copy(m, 0, (int)M_COPYALL); 351 break; 352 #endif 353 #ifdef IPX 354 case AF_IPX: 355 etype = htons(ETHERTYPE_IPX); 356 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 357 (caddr_t)edst, sizeof (edst)); 358 /* If broadcasting on a simplex interface, loopback a copy */ 359 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 360 mcopy = m_copy(m, 0, (int)M_COPYALL); 361 break; 362 #endif 363 #ifdef ISO 364 case AF_ISO: { 365 int snpalen; 366 struct llc *l; 367 struct sockaddr_dl *sdl; 368 369 if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) && 370 sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) { 371 bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst)); 372 } else { 373 error = iso_snparesolve(ifp, (struct sockaddr_iso *)dst, 374 (char *)edst, &snpalen); 375 if (error) 376 goto bad; /* Not Resolved */ 377 } 378 /* If broadcasting on a simplex interface, loopback a copy */ 379 if (*edst & 1) 380 m->m_flags |= (M_BCAST|M_MCAST); 381 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) && 382 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 383 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 384 if (mcopy) { 385 eh = mtod(mcopy, struct ether_header *); 386 bcopy((caddr_t)edst, 387 (caddr_t)eh->ether_dhost, sizeof (edst)); 388 bcopy(LLADDR(ifp->if_sadl), 389 (caddr_t)eh->ether_shost, sizeof (edst)); 390 } 391 } 392 M_PREPEND(m, 3, M_DONTWAIT); 393 if (m == NULL) 394 return (0); 395 l = mtod(m, struct llc *); 396 l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP; 397 l->llc_control = LLC_UI; 398 #ifdef ARGO_DEBUG 399 if (argo_debug[D_ETHER]) { 400 int i; 401 printf("unoutput: sending pkt to: "); 402 for (i=0; i<6; i++) 403 printf("%x ", edst[i] & 0xff); 404 printf("\n"); 405 } 406 #endif 407 } break; 408 #endif /* ISO */ 409 #ifdef LLC 410 /* case AF_NSAP: */ 411 case AF_CCITT: { 412 struct sockaddr_dl *sdl = 413 (struct sockaddr_dl *) rt -> rt_gateway; 414 415 if (sdl && sdl->sdl_family == AF_LINK 416 && sdl->sdl_alen > 0) { 417 bcopy(LLADDR(sdl), (char *)edst, 418 sizeof(edst)); 419 } else goto bad; /* Not a link interface ? Funny ... */ 420 if ((ifp->if_flags & IFF_SIMPLEX) && (*edst & 1) && 421 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 422 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 423 if (mcopy) { 424 eh = mtod(mcopy, struct ether_header *); 425 bcopy((caddr_t)edst, 426 (caddr_t)eh->ether_dhost, sizeof (edst)); 427 bcopy(LLADDR(ifp->if_sadl), 428 (caddr_t)eh->ether_shost, sizeof (edst)); 429 } 430 } 431 #ifdef LLC_DEBUG 432 { 433 int i; 434 struct llc *l = mtod(m, struct llc *); 435 436 printf("ether_output: sending LLC2 pkt to: "); 437 for (i=0; i<6; i++) 438 printf("%x ", edst[i] & 0xff); 439 printf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n", 440 m->m_pkthdr.len, l->llc_dsap & 0xff, l->llc_ssap &0xff, 441 l->llc_control & 0xff); 442 443 } 444 #endif /* LLC_DEBUG */ 445 } break; 446 #endif /* LLC */ 447 448 case pseudo_AF_HDRCMPLT: 449 hdrcmplt = 1; 450 eh = (struct ether_header *)dst->sa_data; 451 bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, sizeof (esrc)); 452 /* FALLTHROUGH */ 453 454 case AF_UNSPEC: 455 eh = (struct ether_header *)dst->sa_data; 456 bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, sizeof (edst)); 457 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 458 etype = eh->ether_type; 459 break; 460 461 default: 462 printf("%s: can't handle af%d\n", ifp->if_xname, 463 dst->sa_family); 464 senderr(EAFNOSUPPORT); 465 } 466 467 if (mcopy) 468 (void) looutput(ifp, mcopy, dst, rt); 469 470 /* If no ether type is set, this must be a 802.2 formatted packet. 471 */ 472 if (etype == 0) 473 etype = htons(m->m_pkthdr.len); 474 /* 475 * Add local net header. If no space in first mbuf, 476 * allocate another. 477 */ 478 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 479 if (m == 0) 480 senderr(ENOBUFS); 481 eh = mtod(m, struct ether_header *); 482 bcopy((caddr_t)&etype,(caddr_t)&eh->ether_type, 483 sizeof(eh->ether_type)); 484 bcopy((caddr_t)edst, (caddr_t)eh->ether_dhost, sizeof (edst)); 485 if (hdrcmplt) 486 bcopy((caddr_t)esrc, (caddr_t)eh->ether_shost, 487 sizeof(eh->ether_shost)); 488 else 489 bcopy(LLADDR(ifp->if_sadl), (caddr_t)eh->ether_shost, 490 sizeof(eh->ether_shost)); 491 492 #ifdef PFIL_HOOKS 493 if ((error = pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 494 return (error); 495 if (m == NULL) 496 return (0); 497 #endif 498 499 #if NBRIDGE > 0 500 /* 501 * Bridges require special output handling. 502 */ 503 if (ifp->if_bridge) 504 return (bridge_output(ifp, m, NULL, NULL)); 505 #endif 506 507 #ifdef ALTQ 508 /* 509 * If ALTQ is enabled on the parent interface, do 510 * classification; the queueing discipline might not 511 * require classification, but might require the 512 * address family/header pointer in the pktattr. 513 */ 514 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 515 altq_etherclassify(&ifp->if_snd, m, &pktattr); 516 #endif 517 518 mflags = m->m_flags; 519 len = m->m_pkthdr.len; 520 s = splnet(); 521 /* 522 * Queue message on interface, and start output if interface 523 * not yet active. 524 */ 525 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, error); 526 if (error) { 527 /* mbuf is already freed */ 528 splx(s); 529 return (error); 530 } 531 ifp->if_obytes += len; 532 if (mflags & M_MCAST) 533 ifp->if_omcasts++; 534 if ((ifp->if_flags & IFF_OACTIVE) == 0) 535 (*ifp->if_start)(ifp); 536 splx(s); 537 return (error); 538 539 bad: 540 if (m) 541 m_freem(m); 542 return (error); 543 } 544 545 #ifdef ALTQ 546 /* 547 * This routine is a slight hack to allow a packet to be classified 548 * if the Ethernet headers are present. It will go away when ALTQ's 549 * classification engine understands link headers. 550 */ 551 void 552 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m, 553 struct altq_pktattr *pktattr) 554 { 555 struct ether_header *eh; 556 u_int16_t ether_type; 557 int hlen, af, hdrsize; 558 caddr_t hdr; 559 560 hlen = ETHER_HDR_LEN; 561 eh = mtod(m, struct ether_header *); 562 563 ether_type = htons(eh->ether_type); 564 565 if (ether_type < ETHERMTU) { 566 /* LLC/SNAP */ 567 struct llc *llc = (struct llc *)(eh + 1); 568 hlen += 8; 569 570 if (m->m_len < hlen || 571 llc->llc_dsap != LLC_SNAP_LSAP || 572 llc->llc_ssap != LLC_SNAP_LSAP || 573 llc->llc_control != LLC_UI) { 574 /* Not SNAP. */ 575 goto bad; 576 } 577 578 ether_type = htons(llc->llc_un.type_snap.ether_type); 579 } 580 581 switch (ether_type) { 582 case ETHERTYPE_IP: 583 af = AF_INET; 584 hdrsize = 20; /* sizeof(struct ip) */ 585 break; 586 587 case ETHERTYPE_IPV6: 588 af = AF_INET6; 589 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 590 break; 591 592 default: 593 af = AF_UNSPEC; 594 hdrsize = 0; 595 break; 596 } 597 598 if (m->m_len < (hlen + hdrsize)) { 599 /* 600 * Ethernet and protocol header not in a single 601 * mbuf. We can't cope with this situation right 602 * now (but it shouldn't ever happen, really, anyhow). 603 * XXX Should use m_pulldown(). 604 */ 605 #ifdef DEBUG 606 printf("altq_etherclassify: headers span multiple mbufs: " 607 "%d < %d\n", m->m_len, (hlen + hdrsize)); 608 #endif 609 goto bad; 610 } 611 612 m->m_data += hlen; 613 m->m_len -= hlen; 614 615 hdr = mtod(m, caddr_t); 616 617 if (ALTQ_NEEDS_CLASSIFY(ifq)) 618 pktattr->pattr_class = 619 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 620 pktattr->pattr_af = af; 621 pktattr->pattr_hdr = hdr; 622 623 m->m_data -= hlen; 624 m->m_len += hlen; 625 626 return; 627 628 bad: 629 pktattr->pattr_class = NULL; 630 pktattr->pattr_hdr = NULL; 631 pktattr->pattr_af = AF_UNSPEC; 632 } 633 #endif /* ALTQ */ 634 635 /* 636 * Process a received Ethernet packet; 637 * the packet is in the mbuf chain m with 638 * the ether header. 639 */ 640 static void 641 ether_input(struct ifnet *ifp, struct mbuf *m) 642 { 643 struct ethercom *ec = (struct ethercom *) ifp; 644 struct ifqueue *inq; 645 u_int16_t etype; 646 int s; 647 struct ether_header *eh; 648 struct mbuf *n; 649 #if defined (ISO) || defined (LLC) || defined(NETATALK) 650 struct llc *l; 651 #endif 652 653 if ((ifp->if_flags & IFF_UP) == 0) { 654 m_freem(m); 655 return; 656 } 657 658 eh = mtod(m, struct ether_header *); 659 etype = ntohs(eh->ether_type); 660 661 /* 662 * Determine if the packet is within its size limits. 663 */ 664 if (m->m_pkthdr.len > 665 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 666 printf("%s: discarding oversize frame (len=%d)\n", 667 ifp->if_xname, m->m_pkthdr.len); 668 m_freem(m); 669 return; 670 } 671 672 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 673 /* 674 * If this is not a simplex interface, drop the packet 675 * if it came from us. 676 */ 677 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 678 memcmp(LLADDR(ifp->if_sadl), eh->ether_shost, 679 ETHER_ADDR_LEN) == 0) { 680 m_freem(m); 681 return; 682 } 683 684 if (memcmp(etherbroadcastaddr, 685 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 686 m->m_flags |= M_BCAST; 687 else 688 m->m_flags |= M_MCAST; 689 ifp->if_imcasts++; 690 } 691 692 /* If the CRC is still on the packet, trim it off. */ 693 if (m->m_flags & M_HASFCS) { 694 m_adj(m, -ETHER_CRC_LEN); 695 m->m_flags &= ~M_HASFCS; 696 } 697 698 ifp->if_ibytes += m->m_pkthdr.len; 699 700 #if NBRIDGE > 0 701 /* 702 * Tap the packet off here for a bridge. bridge_input() 703 * will return NULL if it has consumed the packet, otherwise 704 * it gets processed as normal. Note that bridge_input() 705 * will always return the original packet if we need to 706 * process it locally. 707 */ 708 if (ifp->if_bridge) { 709 m = bridge_input(ifp, m); 710 if (m == NULL) 711 return; 712 713 /* 714 * Bridge has determined that the packet is for us. 715 * Update our interface pointer -- we may have had 716 * to "bridge" the packet locally. 717 */ 718 ifp = m->m_pkthdr.rcvif; 719 } 720 #endif /* NBRIDGE > 0 */ 721 722 /* 723 * XXX This comparison is redundant if we are a bridge 724 * XXX and processing the packet locally. 725 */ 726 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0 && 727 (ifp->if_flags & IFF_PROMISC) != 0 && 728 memcmp(LLADDR(ifp->if_sadl), eh->ether_dhost, 729 ETHER_ADDR_LEN) != 0) { 730 m_freem(m); 731 return; 732 } 733 734 #ifdef PFIL_HOOKS 735 if (pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 736 return; 737 if (m == NULL) 738 return; 739 740 eh = mtod(m, struct ether_header *); 741 etype = ntohs(eh->ether_type); 742 #endif 743 744 /* 745 * If VLANs are configured on the interface, check to 746 * see if the device performed the decapsulation and 747 * provided us with the tag. 748 */ 749 if (ec->ec_nvlans && 750 (n = m_aux_find(m, AF_LINK, ETHERTYPE_VLAN)) != NULL) { 751 #if NVLAN > 0 752 /* 753 * vlan_input() will either recursively call ether_input() 754 * or drop the packet. 755 */ 756 vlan_input(ifp, m); 757 #else 758 m_freem(m); 759 #endif 760 return; 761 } 762 763 /* 764 * Handle protocols that expect to have the Ethernet header 765 * (and possibly FCS) intact. 766 */ 767 switch (etype) { 768 #if NVLAN > 0 769 case ETHERTYPE_VLAN: 770 /* 771 * vlan_input() will either recursively call ether_input() 772 * or drop the packet. 773 */ 774 if (((struct ethercom *)ifp)->ec_nvlans != 0) 775 vlan_input(ifp, m); 776 else 777 m_freem(m); 778 return; 779 #endif /* NVLAN > 0 */ 780 #if NPPPOE > 0 781 case ETHERTYPE_PPPOEDISC: 782 case ETHERTYPE_PPPOE: 783 if (etype == ETHERTYPE_PPPOEDISC) 784 inq = &ppoediscinq; 785 else 786 inq = &ppoeinq; 787 s = splnet(); 788 if (IF_QFULL(inq)) { 789 IF_DROP(inq); 790 m_freem(m); 791 } else 792 IF_ENQUEUE(inq, m); 793 splx(s); 794 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 795 if (!callout_active(&pppoe_softintr)) 796 callout_reset(&pppoe_softintr, 1, pppoe_softintr_handler, NULL); 797 #else 798 softintr_schedule(pppoe_softintr); 799 #endif 800 return; 801 #endif /* NPPPOE > 0 */ 802 default: 803 ; /* Nothing. */ 804 } 805 806 /* Strip off the Ethernet header. */ 807 m_adj(m, sizeof(struct ether_header)); 808 809 /* If the CRC is still on the packet, trim it off. */ 810 if (m->m_flags & M_HASFCS) { 811 m_adj(m, -ETHER_CRC_LEN); 812 m->m_flags &= ~M_HASFCS; 813 } 814 815 switch (etype) { 816 #ifdef INET 817 case ETHERTYPE_IP: 818 #ifdef GATEWAY 819 if (ipflow_fastforward(m)) 820 return; 821 #endif 822 schednetisr(NETISR_IP); 823 inq = &ipintrq; 824 break; 825 826 case ETHERTYPE_ARP: 827 schednetisr(NETISR_ARP); 828 inq = &arpintrq; 829 break; 830 831 case ETHERTYPE_REVARP: 832 revarpinput(m); /* XXX queue? */ 833 return; 834 #endif 835 #ifdef INET6 836 case ETHERTYPE_IPV6: 837 schednetisr(NETISR_IPV6); 838 inq = &ip6intrq; 839 break; 840 #endif 841 #ifdef NS 842 case ETHERTYPE_NS: 843 schednetisr(NETISR_NS); 844 inq = &nsintrq; 845 break; 846 847 #endif 848 #ifdef IPX 849 case ETHERTYPE_IPX: 850 schednetisr(NETISR_IPX); 851 inq = &ipxintrq; 852 break; 853 #endif 854 #ifdef NETATALK 855 case ETHERTYPE_ATALK: 856 schednetisr(NETISR_ATALK); 857 inq = &atintrq1; 858 break; 859 case ETHERTYPE_AARP: 860 /* probably this should be done with a NETISR as well */ 861 aarpinput(ifp, m); /* XXX */ 862 return; 863 #endif /* NETATALK */ 864 default: 865 #if defined (ISO) || defined (LLC) || defined (NETATALK) 866 if (etype > ETHERMTU) 867 goto dropanyway; 868 l = mtod(m, struct llc *); 869 switch (l->llc_dsap) { 870 #ifdef NETATALK 871 case LLC_SNAP_LSAP: 872 switch (l->llc_control) { 873 case LLC_UI: 874 if (l->llc_ssap != LLC_SNAP_LSAP) { 875 goto dropanyway; 876 } 877 878 if (Bcmp(&(l->llc_snap_org_code)[0], 879 at_org_code, sizeof(at_org_code)) == 0 && 880 ntohs(l->llc_snap_ether_type) == 881 ETHERTYPE_ATALK) { 882 inq = &atintrq2; 883 m_adj(m, sizeof(struct llc)); 884 schednetisr(NETISR_ATALK); 885 break; 886 } 887 888 if (Bcmp(&(l->llc_snap_org_code)[0], 889 aarp_org_code, 890 sizeof(aarp_org_code)) == 0 && 891 ntohs(l->llc_snap_ether_type) == 892 ETHERTYPE_AARP) { 893 m_adj( m, sizeof(struct llc)); 894 aarpinput(ifp, m); /* XXX */ 895 return; 896 } 897 898 default: 899 goto dropanyway; 900 } 901 break; 902 #endif /* NETATALK */ 903 #ifdef ISO 904 case LLC_ISO_LSAP: 905 switch (l->llc_control) { 906 case LLC_UI: 907 /* LLC_UI_P forbidden in class 1 service */ 908 if ((l->llc_dsap == LLC_ISO_LSAP) && 909 (l->llc_ssap == LLC_ISO_LSAP)) { 910 /* LSAP for ISO */ 911 if (m->m_pkthdr.len > etype) 912 m_adj(m, etype - m->m_pkthdr.len); 913 m->m_data += 3; /* XXX */ 914 m->m_len -= 3; /* XXX */ 915 m->m_pkthdr.len -= 3; /* XXX */ 916 M_PREPEND(m, sizeof *eh, M_DONTWAIT); 917 if (m == 0) 918 return; 919 *mtod(m, struct ether_header *) = *eh; 920 #ifdef ARGO_DEBUG 921 if (argo_debug[D_ETHER]) 922 printf("clnp packet"); 923 #endif 924 schednetisr(NETISR_ISO); 925 inq = &clnlintrq; 926 break; 927 } 928 goto dropanyway; 929 930 case LLC_XID: 931 case LLC_XID_P: 932 if(m->m_len < 6) 933 goto dropanyway; 934 l->llc_window = 0; 935 l->llc_fid = 9; 936 l->llc_class = 1; 937 l->llc_dsap = l->llc_ssap = 0; 938 /* Fall through to */ 939 case LLC_TEST: 940 case LLC_TEST_P: 941 { 942 struct sockaddr sa; 943 struct ether_header *eh2; 944 int i; 945 u_char c = l->llc_dsap; 946 947 l->llc_dsap = l->llc_ssap; 948 l->llc_ssap = c; 949 if (m->m_flags & (M_BCAST | M_MCAST)) 950 bcopy(LLADDR(ifp->if_sadl), 951 (caddr_t)eh->ether_dhost, 6); 952 sa.sa_family = AF_UNSPEC; 953 sa.sa_len = sizeof(sa); 954 eh2 = (struct ether_header *)sa.sa_data; 955 for (i = 0; i < 6; i++) { 956 eh2->ether_shost[i] = c = 957 eh->ether_dhost[i]; 958 eh2->ether_dhost[i] = 959 eh->ether_dhost[i] = 960 eh->ether_shost[i]; 961 eh->ether_shost[i] = c; 962 } 963 ifp->if_output(ifp, m, &sa, NULL); 964 return; 965 } 966 default: 967 m_freem(m); 968 return; 969 } 970 break; 971 #endif /* ISO */ 972 #ifdef LLC 973 case LLC_X25_LSAP: 974 { 975 if (m->m_pkthdr.len > etype) 976 m_adj(m, etype - m->m_pkthdr.len); 977 M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT); 978 if (m == 0) 979 return; 980 if ( !sdl_sethdrif(ifp, eh->ether_shost, LLC_X25_LSAP, 981 eh->ether_dhost, LLC_X25_LSAP, 6, 982 mtod(m, struct sdl_hdr *))) 983 panic("ETHER cons addr failure"); 984 mtod(m, struct sdl_hdr *)->sdlhdr_len = etype; 985 #ifdef LLC_DEBUG 986 printf("llc packet\n"); 987 #endif /* LLC_DEBUG */ 988 schednetisr(NETISR_CCITT); 989 inq = &llcintrq; 990 break; 991 } 992 #endif /* LLC */ 993 dropanyway: 994 default: 995 m_freem(m); 996 return; 997 } 998 #else /* ISO || LLC || NETATALK*/ 999 m_freem(m); 1000 return; 1001 #endif /* ISO || LLC || NETATALK*/ 1002 } 1003 1004 s = splnet(); 1005 if (IF_QFULL(inq)) { 1006 IF_DROP(inq); 1007 m_freem(m); 1008 } else 1009 IF_ENQUEUE(inq, m); 1010 splx(s); 1011 } 1012 1013 /* 1014 * Convert Ethernet address to printable (loggable) representation. 1015 */ 1016 static char digits[] = "0123456789abcdef"; 1017 char * 1018 ether_sprintf(const u_char *ap) 1019 { 1020 static char etherbuf[18]; 1021 char *cp = etherbuf; 1022 int i; 1023 1024 for (i = 0; i < 6; i++) { 1025 *cp++ = digits[*ap >> 4]; 1026 *cp++ = digits[*ap++ & 0xf]; 1027 *cp++ = ':'; 1028 } 1029 *--cp = 0; 1030 return (etherbuf); 1031 } 1032 1033 /* 1034 * Perform common duties while attaching to interface list 1035 */ 1036 void 1037 ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 1038 { 1039 1040 ifp->if_type = IFT_ETHER; 1041 ifp->if_addrlen = ETHER_ADDR_LEN; 1042 ifp->if_hdrlen = 14; 1043 ifp->if_dlt = DLT_EN10MB; 1044 ifp->if_mtu = ETHERMTU; 1045 ifp->if_output = ether_output; 1046 ifp->if_input = ether_input; 1047 if (ifp->if_baudrate == 0) 1048 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 1049 1050 if_alloc_sadl(ifp); 1051 memcpy(LLADDR(ifp->if_sadl), lla, ifp->if_addrlen); 1052 1053 LIST_INIT(&((struct ethercom *)ifp)->ec_multiaddrs); 1054 ifp->if_broadcastaddr = etherbroadcastaddr; 1055 #if NBPFILTER > 0 1056 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 1057 #endif 1058 } 1059 1060 void 1061 ether_ifdetach(struct ifnet *ifp) 1062 { 1063 struct ethercom *ec = (void *) ifp; 1064 struct ether_multi *enm; 1065 int s; 1066 1067 #if NBPFILTER > 0 1068 bpfdetach(ifp); 1069 #endif 1070 1071 #if NVLAN > 0 1072 if (ec->ec_nvlans) 1073 vlan_ifdetach(ifp); 1074 #endif 1075 1076 s = splnet(); 1077 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1078 LIST_REMOVE(enm, enm_list); 1079 free(enm, M_IFADDR); 1080 ec->ec_multicnt--; 1081 } 1082 splx(s); 1083 1084 if_free_sadl(ifp); 1085 } 1086 1087 #if 0 1088 /* 1089 * This is for reference. We have a table-driven version 1090 * of the little-endian crc32 generator, which is faster 1091 * than the double-loop. 1092 */ 1093 u_int32_t 1094 ether_crc32_le(const u_int8_t *buf, size_t len) 1095 { 1096 u_int32_t c, crc, carry; 1097 size_t i, j; 1098 1099 crc = 0xffffffffU; /* initial value */ 1100 1101 for (i = 0; i < len; i++) { 1102 c = buf[i]; 1103 for (j = 0; j < 8; j++) { 1104 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1105 crc >>= 1; 1106 c >>= 1; 1107 if (carry) 1108 crc = (crc ^ ETHER_CRC_POLY_LE); 1109 } 1110 } 1111 1112 return (crc); 1113 } 1114 #else 1115 u_int32_t 1116 ether_crc32_le(const u_int8_t *buf, size_t len) 1117 { 1118 static const u_int32_t crctab[] = { 1119 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1120 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1121 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1122 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1123 }; 1124 u_int32_t crc; 1125 int i; 1126 1127 crc = 0xffffffffU; /* initial value */ 1128 1129 for (i = 0; i < len; i++) { 1130 crc ^= buf[i]; 1131 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1132 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1133 } 1134 1135 return (crc); 1136 } 1137 #endif 1138 1139 u_int32_t 1140 ether_crc32_be(const u_int8_t *buf, size_t len) 1141 { 1142 u_int32_t c, crc, carry; 1143 size_t i, j; 1144 1145 crc = 0xffffffffU; /* initial value */ 1146 1147 for (i = 0; i < len; i++) { 1148 c = buf[i]; 1149 for (j = 0; j < 8; j++) { 1150 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1151 crc <<= 1; 1152 c >>= 1; 1153 if (carry) 1154 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1155 } 1156 } 1157 1158 return (crc); 1159 } 1160 1161 #ifdef INET 1162 u_char ether_ipmulticast_min[6] = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1163 u_char ether_ipmulticast_max[6] = { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1164 #endif 1165 #ifdef INET6 1166 u_char ether_ip6multicast_min[6] = { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1167 u_char ether_ip6multicast_max[6] = { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1168 #endif 1169 1170 /* 1171 * Convert a sockaddr into an Ethernet address or range of Ethernet 1172 * addresses. 1173 */ 1174 int 1175 ether_multiaddr(struct sockaddr *sa, u_int8_t addrlo[ETHER_ADDR_LEN], 1176 u_int8_t addrhi[ETHER_ADDR_LEN]) 1177 { 1178 #ifdef INET 1179 struct sockaddr_in *sin; 1180 #endif /* INET */ 1181 #ifdef INET6 1182 struct sockaddr_in6 *sin6; 1183 #endif /* INET6 */ 1184 1185 switch (sa->sa_family) { 1186 1187 case AF_UNSPEC: 1188 bcopy(sa->sa_data, addrlo, ETHER_ADDR_LEN); 1189 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1190 break; 1191 1192 #ifdef INET 1193 case AF_INET: 1194 sin = satosin(sa); 1195 if (sin->sin_addr.s_addr == INADDR_ANY) { 1196 /* 1197 * An IP address of INADDR_ANY means listen to 1198 * or stop listening to all of the Ethernet 1199 * multicast addresses used for IP. 1200 * (This is for the sake of IP multicast routers.) 1201 */ 1202 bcopy(ether_ipmulticast_min, addrlo, ETHER_ADDR_LEN); 1203 bcopy(ether_ipmulticast_max, addrhi, ETHER_ADDR_LEN); 1204 } 1205 else { 1206 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1207 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1208 } 1209 break; 1210 #endif 1211 #ifdef INET6 1212 case AF_INET6: 1213 sin6 = satosin6(sa); 1214 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1215 /* 1216 * An IP6 address of 0 means listen to or stop 1217 * listening to all of the Ethernet multicast 1218 * address used for IP6. 1219 * (This is used for multicast routers.) 1220 */ 1221 bcopy(ether_ip6multicast_min, addrlo, ETHER_ADDR_LEN); 1222 bcopy(ether_ip6multicast_max, addrhi, ETHER_ADDR_LEN); 1223 } else { 1224 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1225 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1226 } 1227 break; 1228 #endif 1229 1230 default: 1231 return (EAFNOSUPPORT); 1232 } 1233 return (0); 1234 } 1235 1236 /* 1237 * Add an Ethernet multicast address or range of addresses to the list for a 1238 * given interface. 1239 */ 1240 int 1241 ether_addmulti(struct ifreq *ifr, struct ethercom *ec) 1242 { 1243 struct ether_multi *enm; 1244 u_char addrlo[ETHER_ADDR_LEN]; 1245 u_char addrhi[ETHER_ADDR_LEN]; 1246 int s = splnet(), error; 1247 1248 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1249 if (error != 0) { 1250 splx(s); 1251 return (error); 1252 } 1253 1254 /* 1255 * Verify that we have valid Ethernet multicast addresses. 1256 */ 1257 if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) { 1258 splx(s); 1259 return (EINVAL); 1260 } 1261 /* 1262 * See if the address range is already in the list. 1263 */ 1264 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1265 if (enm != NULL) { 1266 /* 1267 * Found it; just increment the reference count. 1268 */ 1269 ++enm->enm_refcount; 1270 splx(s); 1271 return (0); 1272 } 1273 /* 1274 * New address or range; malloc a new multicast record 1275 * and link it into the interface's multicast list. 1276 */ 1277 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1278 if (enm == NULL) { 1279 splx(s); 1280 return (ENOBUFS); 1281 } 1282 bcopy(addrlo, enm->enm_addrlo, 6); 1283 bcopy(addrhi, enm->enm_addrhi, 6); 1284 enm->enm_ec = ec; 1285 enm->enm_refcount = 1; 1286 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1287 ec->ec_multicnt++; 1288 splx(s); 1289 /* 1290 * Return ENETRESET to inform the driver that the list has changed 1291 * and its reception filter should be adjusted accordingly. 1292 */ 1293 return (ENETRESET); 1294 } 1295 1296 /* 1297 * Delete a multicast address record. 1298 */ 1299 int 1300 ether_delmulti(struct ifreq *ifr, struct ethercom *ec) 1301 { 1302 struct ether_multi *enm; 1303 u_char addrlo[ETHER_ADDR_LEN]; 1304 u_char addrhi[ETHER_ADDR_LEN]; 1305 int s = splnet(), error; 1306 1307 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1308 if (error != 0) { 1309 splx(s); 1310 return (error); 1311 } 1312 1313 /* 1314 * Look ur the address in our list. 1315 */ 1316 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1317 if (enm == NULL) { 1318 splx(s); 1319 return (ENXIO); 1320 } 1321 if (--enm->enm_refcount != 0) { 1322 /* 1323 * Still some claims to this record. 1324 */ 1325 splx(s); 1326 return (0); 1327 } 1328 /* 1329 * No remaining claims to this record; unlink and free it. 1330 */ 1331 LIST_REMOVE(enm, enm_list); 1332 free(enm, M_IFMADDR); 1333 ec->ec_multicnt--; 1334 splx(s); 1335 /* 1336 * Return ENETRESET to inform the driver that the list has changed 1337 * and its reception filter should be adjusted accordingly. 1338 */ 1339 return (ENETRESET); 1340 } 1341 1342 /* 1343 * Common ioctls for Ethernet interfaces. Note, we must be 1344 * called at splnet(). 1345 */ 1346 int 1347 ether_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1348 { 1349 struct ethercom *ec = (void *) ifp; 1350 struct ifreq *ifr = (struct ifreq *)data; 1351 struct ifaddr *ifa = (struct ifaddr *)data; 1352 int error = 0; 1353 1354 switch (cmd) { 1355 case SIOCSIFADDR: 1356 ifp->if_flags |= IFF_UP; 1357 switch (ifa->ifa_addr->sa_family) { 1358 case AF_LINK: 1359 { 1360 struct sockaddr_dl *sdl = 1361 (struct sockaddr_dl *) ifa->ifa_addr; 1362 1363 if (sdl->sdl_type != IFT_ETHER || 1364 sdl->sdl_alen != ifp->if_addrlen) { 1365 error = EINVAL; 1366 break; 1367 } 1368 1369 memcpy(LLADDR(ifp->if_sadl), LLADDR(sdl), 1370 ifp->if_addrlen); 1371 1372 /* Set new address. */ 1373 error = (*ifp->if_init)(ifp); 1374 break; 1375 } 1376 #ifdef INET 1377 case AF_INET: 1378 if ((ifp->if_flags & IFF_RUNNING) == 0 && 1379 (error = (*ifp->if_init)(ifp)) != 0) 1380 break; 1381 arp_ifinit(ifp, ifa); 1382 break; 1383 #endif /* INET */ 1384 #ifdef NS 1385 case AF_NS: 1386 { 1387 struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; 1388 1389 if (ns_nullhost(*ina)) 1390 ina->x_host = *(union ns_host *) 1391 LLADDR(ifp->if_sadl); 1392 else 1393 memcpy(LLADDR(ifp->if_sadl), 1394 ina->x_host.c_host, ifp->if_addrlen); 1395 /* Set new address. */ 1396 error = (*ifp->if_init)(ifp); 1397 break; 1398 } 1399 #endif /* NS */ 1400 default: 1401 if ((ifp->if_flags & IFF_RUNNING) == 0) 1402 error = (*ifp->if_init)(ifp); 1403 break; 1404 } 1405 break; 1406 1407 case SIOCGIFADDR: 1408 memcpy(((struct sockaddr *)&ifr->ifr_data)->sa_data, 1409 LLADDR(ifp->if_sadl), ETHER_ADDR_LEN); 1410 break; 1411 1412 case SIOCSIFMTU: 1413 { 1414 int maxmtu; 1415 1416 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1417 maxmtu = ETHERMTU_JUMBO; 1418 else 1419 maxmtu = ETHERMTU; 1420 1421 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1422 error = EINVAL; 1423 else { 1424 ifp->if_mtu = ifr->ifr_mtu; 1425 1426 /* Make sure the device notices the MTU change. */ 1427 if (ifp->if_flags & IFF_UP) 1428 error = (*ifp->if_init)(ifp); 1429 } 1430 break; 1431 } 1432 1433 case SIOCSIFFLAGS: 1434 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_RUNNING) { 1435 /* 1436 * If interface is marked down and it is running, 1437 * then stop and disable it. 1438 */ 1439 (*ifp->if_stop)(ifp, 1); 1440 } else if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_UP) { 1441 /* 1442 * If interface is marked up and it is stopped, then 1443 * start it. 1444 */ 1445 error = (*ifp->if_init)(ifp); 1446 } else if ((ifp->if_flags & IFF_UP) != 0) { 1447 /* 1448 * Reset the interface to pick up changes in any other 1449 * flags that affect the hardware state. 1450 */ 1451 error = (*ifp->if_init)(ifp); 1452 } 1453 break; 1454 1455 case SIOCADDMULTI: 1456 error = ether_addmulti(ifr, ec); 1457 break; 1458 1459 case SIOCDELMULTI: 1460 error = ether_delmulti(ifr, ec); 1461 break; 1462 1463 default: 1464 error = ENOTTY; 1465 } 1466 1467 return (error); 1468 } 1469
Indexes created Mon Sep 22 05:09:51 GMT 2025