if_ethersubr.c revision 1.95
1 /* $NetBSD: if_ethersubr.c,v 1.95 2002/05/18 22:52:44 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 <sys/cdefs.h> 68 __KERNEL_RCSID(0, "$NetBSD: if_ethersubr.c,v 1.95 2002/05/18 22:52:44 itojun 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 while (m->m_len <= hlen) { 599 hlen -= m->m_len; 600 m = m->m_next; 601 } 602 if (m->m_len < (hlen + hdrsize)) { 603 /* 604 * protocol header not in a single mbuf. 605 * We can't cope with this situation right 606 * now (but it shouldn't ever happen, really, anyhow). 607 */ 608 #ifdef DEBUG 609 printf("altq_etherclassify: headers span multiple mbufs: " 610 "%d < %d\n", m->m_len, (hlen + hdrsize)); 611 #endif 612 goto bad; 613 } 614 615 m->m_data += hlen; 616 m->m_len -= hlen; 617 618 hdr = mtod(m, caddr_t); 619 620 if (ALTQ_NEEDS_CLASSIFY(ifq)) 621 pktattr->pattr_class = 622 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 623 pktattr->pattr_af = af; 624 pktattr->pattr_hdr = hdr; 625 626 m->m_data -= hlen; 627 m->m_len += hlen; 628 629 return; 630 631 bad: 632 pktattr->pattr_class = NULL; 633 pktattr->pattr_hdr = NULL; 634 pktattr->pattr_af = AF_UNSPEC; 635 } 636 #endif /* ALTQ */ 637 638 /* 639 * Process a received Ethernet packet; 640 * the packet is in the mbuf chain m with 641 * the ether header. 642 */ 643 static void 644 ether_input(struct ifnet *ifp, struct mbuf *m) 645 { 646 struct ethercom *ec = (struct ethercom *) ifp; 647 struct ifqueue *inq; 648 u_int16_t etype; 649 int s; 650 struct ether_header *eh; 651 struct mbuf *n; 652 #if defined (ISO) || defined (LLC) || defined(NETATALK) 653 struct llc *l; 654 #endif 655 656 if ((ifp->if_flags & IFF_UP) == 0) { 657 m_freem(m); 658 return; 659 } 660 661 eh = mtod(m, struct ether_header *); 662 etype = ntohs(eh->ether_type); 663 664 /* 665 * Determine if the packet is within its size limits. 666 */ 667 if (m->m_pkthdr.len > 668 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 669 printf("%s: discarding oversize frame (len=%d)\n", 670 ifp->if_xname, m->m_pkthdr.len); 671 m_freem(m); 672 return; 673 } 674 675 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 676 /* 677 * If this is not a simplex interface, drop the packet 678 * if it came from us. 679 */ 680 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 681 memcmp(LLADDR(ifp->if_sadl), eh->ether_shost, 682 ETHER_ADDR_LEN) == 0) { 683 m_freem(m); 684 return; 685 } 686 687 if (memcmp(etherbroadcastaddr, 688 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 689 m->m_flags |= M_BCAST; 690 else 691 m->m_flags |= M_MCAST; 692 ifp->if_imcasts++; 693 } 694 695 /* If the CRC is still on the packet, trim it off. */ 696 if (m->m_flags & M_HASFCS) { 697 m_adj(m, -ETHER_CRC_LEN); 698 m->m_flags &= ~M_HASFCS; 699 } 700 701 ifp->if_ibytes += m->m_pkthdr.len; 702 703 #if NBRIDGE > 0 704 /* 705 * Tap the packet off here for a bridge. bridge_input() 706 * will return NULL if it has consumed the packet, otherwise 707 * it gets processed as normal. Note that bridge_input() 708 * will always return the original packet if we need to 709 * process it locally. 710 */ 711 if (ifp->if_bridge) { 712 m = bridge_input(ifp, m); 713 if (m == NULL) 714 return; 715 716 /* 717 * Bridge has determined that the packet is for us. 718 * Update our interface pointer -- we may have had 719 * to "bridge" the packet locally. 720 */ 721 ifp = m->m_pkthdr.rcvif; 722 } 723 #endif /* NBRIDGE > 0 */ 724 725 /* 726 * XXX This comparison is redundant if we are a bridge 727 * XXX and processing the packet locally. 728 */ 729 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0 && 730 (ifp->if_flags & IFF_PROMISC) != 0 && 731 memcmp(LLADDR(ifp->if_sadl), eh->ether_dhost, 732 ETHER_ADDR_LEN) != 0) { 733 m_freem(m); 734 return; 735 } 736 737 #ifdef PFIL_HOOKS 738 if (pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 739 return; 740 if (m == NULL) 741 return; 742 743 eh = mtod(m, struct ether_header *); 744 etype = ntohs(eh->ether_type); 745 #endif 746 747 /* 748 * If VLANs are configured on the interface, check to 749 * see if the device performed the decapsulation and 750 * provided us with the tag. 751 */ 752 if (ec->ec_nvlans && 753 (n = m_aux_find(m, AF_LINK, ETHERTYPE_VLAN)) != NULL) { 754 #if NVLAN > 0 755 /* 756 * vlan_input() will either recursively call ether_input() 757 * or drop the packet. 758 */ 759 vlan_input(ifp, m); 760 #else 761 m_freem(m); 762 #endif 763 return; 764 } 765 766 /* 767 * Handle protocols that expect to have the Ethernet header 768 * (and possibly FCS) intact. 769 */ 770 switch (etype) { 771 #if NVLAN > 0 772 case ETHERTYPE_VLAN: 773 /* 774 * vlan_input() will either recursively call ether_input() 775 * or drop the packet. 776 */ 777 if (((struct ethercom *)ifp)->ec_nvlans != 0) 778 vlan_input(ifp, m); 779 else 780 m_freem(m); 781 return; 782 #endif /* NVLAN > 0 */ 783 #if NPPPOE > 0 784 case ETHERTYPE_PPPOEDISC: 785 case ETHERTYPE_PPPOE: 786 if (etype == ETHERTYPE_PPPOEDISC) 787 inq = &ppoediscinq; 788 else 789 inq = &ppoeinq; 790 s = splnet(); 791 if (IF_QFULL(inq)) { 792 IF_DROP(inq); 793 m_freem(m); 794 } else 795 IF_ENQUEUE(inq, m); 796 splx(s); 797 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 798 if (!callout_active(&pppoe_softintr)) 799 callout_reset(&pppoe_softintr, 1, pppoe_softintr_handler, NULL); 800 #else 801 softintr_schedule(pppoe_softintr); 802 #endif 803 return; 804 #endif /* NPPPOE > 0 */ 805 default: 806 ; /* Nothing. */ 807 } 808 809 /* Strip off the Ethernet header. */ 810 m_adj(m, sizeof(struct ether_header)); 811 812 /* If the CRC is still on the packet, trim it off. */ 813 if (m->m_flags & M_HASFCS) { 814 m_adj(m, -ETHER_CRC_LEN); 815 m->m_flags &= ~M_HASFCS; 816 } 817 818 switch (etype) { 819 #ifdef INET 820 case ETHERTYPE_IP: 821 #ifdef GATEWAY 822 if (ipflow_fastforward(m)) 823 return; 824 #endif 825 schednetisr(NETISR_IP); 826 inq = &ipintrq; 827 break; 828 829 case ETHERTYPE_ARP: 830 schednetisr(NETISR_ARP); 831 inq = &arpintrq; 832 break; 833 834 case ETHERTYPE_REVARP: 835 revarpinput(m); /* XXX queue? */ 836 return; 837 #endif 838 #ifdef INET6 839 case ETHERTYPE_IPV6: 840 schednetisr(NETISR_IPV6); 841 inq = &ip6intrq; 842 break; 843 #endif 844 #ifdef NS 845 case ETHERTYPE_NS: 846 schednetisr(NETISR_NS); 847 inq = &nsintrq; 848 break; 849 850 #endif 851 #ifdef IPX 852 case ETHERTYPE_IPX: 853 schednetisr(NETISR_IPX); 854 inq = &ipxintrq; 855 break; 856 #endif 857 #ifdef NETATALK 858 case ETHERTYPE_ATALK: 859 schednetisr(NETISR_ATALK); 860 inq = &atintrq1; 861 break; 862 case ETHERTYPE_AARP: 863 /* probably this should be done with a NETISR as well */ 864 aarpinput(ifp, m); /* XXX */ 865 return; 866 #endif /* NETATALK */ 867 default: 868 #if defined (ISO) || defined (LLC) || defined (NETATALK) 869 if (etype > ETHERMTU) 870 goto dropanyway; 871 l = mtod(m, struct llc *); 872 switch (l->llc_dsap) { 873 #ifdef NETATALK 874 case LLC_SNAP_LSAP: 875 switch (l->llc_control) { 876 case LLC_UI: 877 if (l->llc_ssap != LLC_SNAP_LSAP) { 878 goto dropanyway; 879 } 880 881 if (Bcmp(&(l->llc_snap_org_code)[0], 882 at_org_code, sizeof(at_org_code)) == 0 && 883 ntohs(l->llc_snap_ether_type) == 884 ETHERTYPE_ATALK) { 885 inq = &atintrq2; 886 m_adj(m, sizeof(struct llc)); 887 schednetisr(NETISR_ATALK); 888 break; 889 } 890 891 if (Bcmp(&(l->llc_snap_org_code)[0], 892 aarp_org_code, 893 sizeof(aarp_org_code)) == 0 && 894 ntohs(l->llc_snap_ether_type) == 895 ETHERTYPE_AARP) { 896 m_adj( m, sizeof(struct llc)); 897 aarpinput(ifp, m); /* XXX */ 898 return; 899 } 900 901 default: 902 goto dropanyway; 903 } 904 break; 905 #endif /* NETATALK */ 906 #ifdef ISO 907 case LLC_ISO_LSAP: 908 switch (l->llc_control) { 909 case LLC_UI: 910 /* LLC_UI_P forbidden in class 1 service */ 911 if ((l->llc_dsap == LLC_ISO_LSAP) && 912 (l->llc_ssap == LLC_ISO_LSAP)) { 913 /* LSAP for ISO */ 914 if (m->m_pkthdr.len > etype) 915 m_adj(m, etype - m->m_pkthdr.len); 916 m->m_data += 3; /* XXX */ 917 m->m_len -= 3; /* XXX */ 918 m->m_pkthdr.len -= 3; /* XXX */ 919 M_PREPEND(m, sizeof *eh, M_DONTWAIT); 920 if (m == 0) 921 return; 922 *mtod(m, struct ether_header *) = *eh; 923 #ifdef ARGO_DEBUG 924 if (argo_debug[D_ETHER]) 925 printf("clnp packet"); 926 #endif 927 schednetisr(NETISR_ISO); 928 inq = &clnlintrq; 929 break; 930 } 931 goto dropanyway; 932 933 case LLC_XID: 934 case LLC_XID_P: 935 if(m->m_len < 6) 936 goto dropanyway; 937 l->llc_window = 0; 938 l->llc_fid = 9; 939 l->llc_class = 1; 940 l->llc_dsap = l->llc_ssap = 0; 941 /* Fall through to */ 942 case LLC_TEST: 943 case LLC_TEST_P: 944 { 945 struct sockaddr sa; 946 struct ether_header *eh2; 947 int i; 948 u_char c = l->llc_dsap; 949 950 l->llc_dsap = l->llc_ssap; 951 l->llc_ssap = c; 952 if (m->m_flags & (M_BCAST | M_MCAST)) 953 bcopy(LLADDR(ifp->if_sadl), 954 (caddr_t)eh->ether_dhost, 6); 955 sa.sa_family = AF_UNSPEC; 956 sa.sa_len = sizeof(sa); 957 eh2 = (struct ether_header *)sa.sa_data; 958 for (i = 0; i < 6; i++) { 959 eh2->ether_shost[i] = c = 960 eh->ether_dhost[i]; 961 eh2->ether_dhost[i] = 962 eh->ether_dhost[i] = 963 eh->ether_shost[i]; 964 eh->ether_shost[i] = c; 965 } 966 ifp->if_output(ifp, m, &sa, NULL); 967 return; 968 } 969 default: 970 m_freem(m); 971 return; 972 } 973 break; 974 #endif /* ISO */ 975 #ifdef LLC 976 case LLC_X25_LSAP: 977 { 978 if (m->m_pkthdr.len > etype) 979 m_adj(m, etype - m->m_pkthdr.len); 980 M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT); 981 if (m == 0) 982 return; 983 if ( !sdl_sethdrif(ifp, eh->ether_shost, LLC_X25_LSAP, 984 eh->ether_dhost, LLC_X25_LSAP, 6, 985 mtod(m, struct sdl_hdr *))) 986 panic("ETHER cons addr failure"); 987 mtod(m, struct sdl_hdr *)->sdlhdr_len = etype; 988 #ifdef LLC_DEBUG 989 printf("llc packet\n"); 990 #endif /* LLC_DEBUG */ 991 schednetisr(NETISR_CCITT); 992 inq = &llcintrq; 993 break; 994 } 995 #endif /* LLC */ 996 dropanyway: 997 default: 998 m_freem(m); 999 return; 1000 } 1001 #else /* ISO || LLC || NETATALK*/ 1002 m_freem(m); 1003 return; 1004 #endif /* ISO || LLC || NETATALK*/ 1005 } 1006 1007 s = splnet(); 1008 if (IF_QFULL(inq)) { 1009 IF_DROP(inq); 1010 m_freem(m); 1011 } else 1012 IF_ENQUEUE(inq, m); 1013 splx(s); 1014 } 1015 1016 /* 1017 * Convert Ethernet address to printable (loggable) representation. 1018 */ 1019 static char digits[] = "0123456789abcdef"; 1020 char * 1021 ether_sprintf(const u_char *ap) 1022 { 1023 static char etherbuf[18]; 1024 char *cp = etherbuf; 1025 int i; 1026 1027 for (i = 0; i < 6; i++) { 1028 *cp++ = digits[*ap >> 4]; 1029 *cp++ = digits[*ap++ & 0xf]; 1030 *cp++ = ':'; 1031 } 1032 *--cp = 0; 1033 return (etherbuf); 1034 } 1035 1036 /* 1037 * Perform common duties while attaching to interface list 1038 */ 1039 void 1040 ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 1041 { 1042 1043 ifp->if_type = IFT_ETHER; 1044 ifp->if_addrlen = ETHER_ADDR_LEN; 1045 ifp->if_hdrlen = ETHER_HDR_LEN; 1046 ifp->if_dlt = DLT_EN10MB; 1047 ifp->if_mtu = ETHERMTU; 1048 ifp->if_output = ether_output; 1049 ifp->if_input = ether_input; 1050 if (ifp->if_baudrate == 0) 1051 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 1052 1053 if_alloc_sadl(ifp); 1054 memcpy(LLADDR(ifp->if_sadl), lla, ifp->if_addrlen); 1055 1056 LIST_INIT(&((struct ethercom *)ifp)->ec_multiaddrs); 1057 ifp->if_broadcastaddr = etherbroadcastaddr; 1058 #if NBPFILTER > 0 1059 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 1060 #endif 1061 } 1062 1063 void 1064 ether_ifdetach(struct ifnet *ifp) 1065 { 1066 struct ethercom *ec = (void *) ifp; 1067 struct ether_multi *enm; 1068 int s; 1069 1070 #if NBPFILTER > 0 1071 bpfdetach(ifp); 1072 #endif 1073 1074 #if NVLAN > 0 1075 if (ec->ec_nvlans) 1076 vlan_ifdetach(ifp); 1077 #endif 1078 1079 s = splnet(); 1080 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1081 LIST_REMOVE(enm, enm_list); 1082 free(enm, M_IFADDR); 1083 ec->ec_multicnt--; 1084 } 1085 splx(s); 1086 1087 if_free_sadl(ifp); 1088 } 1089 1090 #if 0 1091 /* 1092 * This is for reference. We have a table-driven version 1093 * of the little-endian crc32 generator, which is faster 1094 * than the double-loop. 1095 */ 1096 u_int32_t 1097 ether_crc32_le(const u_int8_t *buf, size_t len) 1098 { 1099 u_int32_t c, crc, carry; 1100 size_t i, j; 1101 1102 crc = 0xffffffffU; /* initial value */ 1103 1104 for (i = 0; i < len; i++) { 1105 c = buf[i]; 1106 for (j = 0; j < 8; j++) { 1107 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1108 crc >>= 1; 1109 c >>= 1; 1110 if (carry) 1111 crc = (crc ^ ETHER_CRC_POLY_LE); 1112 } 1113 } 1114 1115 return (crc); 1116 } 1117 #else 1118 u_int32_t 1119 ether_crc32_le(const u_int8_t *buf, size_t len) 1120 { 1121 static const u_int32_t crctab[] = { 1122 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1123 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1124 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1125 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1126 }; 1127 u_int32_t crc; 1128 int i; 1129 1130 crc = 0xffffffffU; /* initial value */ 1131 1132 for (i = 0; i < len; i++) { 1133 crc ^= buf[i]; 1134 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1135 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1136 } 1137 1138 return (crc); 1139 } 1140 #endif 1141 1142 u_int32_t 1143 ether_crc32_be(const u_int8_t *buf, size_t len) 1144 { 1145 u_int32_t c, crc, carry; 1146 size_t i, j; 1147 1148 crc = 0xffffffffU; /* initial value */ 1149 1150 for (i = 0; i < len; i++) { 1151 c = buf[i]; 1152 for (j = 0; j < 8; j++) { 1153 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1154 crc <<= 1; 1155 c >>= 1; 1156 if (carry) 1157 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1158 } 1159 } 1160 1161 return (crc); 1162 } 1163 1164 #ifdef INET 1165 u_char ether_ipmulticast_min[6] = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1166 u_char ether_ipmulticast_max[6] = { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1167 #endif 1168 #ifdef INET6 1169 u_char ether_ip6multicast_min[6] = { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1170 u_char ether_ip6multicast_max[6] = { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1171 #endif 1172 1173 /* 1174 * Convert a sockaddr into an Ethernet address or range of Ethernet 1175 * addresses. 1176 */ 1177 int 1178 ether_multiaddr(struct sockaddr *sa, u_int8_t addrlo[ETHER_ADDR_LEN], 1179 u_int8_t addrhi[ETHER_ADDR_LEN]) 1180 { 1181 #ifdef INET 1182 struct sockaddr_in *sin; 1183 #endif /* INET */ 1184 #ifdef INET6 1185 struct sockaddr_in6 *sin6; 1186 #endif /* INET6 */ 1187 1188 switch (sa->sa_family) { 1189 1190 case AF_UNSPEC: 1191 bcopy(sa->sa_data, addrlo, ETHER_ADDR_LEN); 1192 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1193 break; 1194 1195 #ifdef INET 1196 case AF_INET: 1197 sin = satosin(sa); 1198 if (sin->sin_addr.s_addr == INADDR_ANY) { 1199 /* 1200 * An IP address of INADDR_ANY means listen to 1201 * or stop listening to all of the Ethernet 1202 * multicast addresses used for IP. 1203 * (This is for the sake of IP multicast routers.) 1204 */ 1205 bcopy(ether_ipmulticast_min, addrlo, ETHER_ADDR_LEN); 1206 bcopy(ether_ipmulticast_max, addrhi, ETHER_ADDR_LEN); 1207 } 1208 else { 1209 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1210 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1211 } 1212 break; 1213 #endif 1214 #ifdef INET6 1215 case AF_INET6: 1216 sin6 = satosin6(sa); 1217 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1218 /* 1219 * An IP6 address of 0 means listen to or stop 1220 * listening to all of the Ethernet multicast 1221 * address used for IP6. 1222 * (This is used for multicast routers.) 1223 */ 1224 bcopy(ether_ip6multicast_min, addrlo, ETHER_ADDR_LEN); 1225 bcopy(ether_ip6multicast_max, addrhi, ETHER_ADDR_LEN); 1226 } else { 1227 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1228 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1229 } 1230 break; 1231 #endif 1232 1233 default: 1234 return (EAFNOSUPPORT); 1235 } 1236 return (0); 1237 } 1238 1239 /* 1240 * Add an Ethernet multicast address or range of addresses to the list for a 1241 * given interface. 1242 */ 1243 int 1244 ether_addmulti(struct ifreq *ifr, struct ethercom *ec) 1245 { 1246 struct ether_multi *enm; 1247 u_char addrlo[ETHER_ADDR_LEN]; 1248 u_char addrhi[ETHER_ADDR_LEN]; 1249 int s = splnet(), error; 1250 1251 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1252 if (error != 0) { 1253 splx(s); 1254 return (error); 1255 } 1256 1257 /* 1258 * Verify that we have valid Ethernet multicast addresses. 1259 */ 1260 if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) { 1261 splx(s); 1262 return (EINVAL); 1263 } 1264 /* 1265 * See if the address range is already in the list. 1266 */ 1267 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1268 if (enm != NULL) { 1269 /* 1270 * Found it; just increment the reference count. 1271 */ 1272 ++enm->enm_refcount; 1273 splx(s); 1274 return (0); 1275 } 1276 /* 1277 * New address or range; malloc a new multicast record 1278 * and link it into the interface's multicast list. 1279 */ 1280 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1281 if (enm == NULL) { 1282 splx(s); 1283 return (ENOBUFS); 1284 } 1285 bcopy(addrlo, enm->enm_addrlo, 6); 1286 bcopy(addrhi, enm->enm_addrhi, 6); 1287 enm->enm_ec = ec; 1288 enm->enm_refcount = 1; 1289 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1290 ec->ec_multicnt++; 1291 splx(s); 1292 /* 1293 * Return ENETRESET to inform the driver that the list has changed 1294 * and its reception filter should be adjusted accordingly. 1295 */ 1296 return (ENETRESET); 1297 } 1298 1299 /* 1300 * Delete a multicast address record. 1301 */ 1302 int 1303 ether_delmulti(struct ifreq *ifr, struct ethercom *ec) 1304 { 1305 struct ether_multi *enm; 1306 u_char addrlo[ETHER_ADDR_LEN]; 1307 u_char addrhi[ETHER_ADDR_LEN]; 1308 int s = splnet(), error; 1309 1310 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1311 if (error != 0) { 1312 splx(s); 1313 return (error); 1314 } 1315 1316 /* 1317 * Look ur the address in our list. 1318 */ 1319 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1320 if (enm == NULL) { 1321 splx(s); 1322 return (ENXIO); 1323 } 1324 if (--enm->enm_refcount != 0) { 1325 /* 1326 * Still some claims to this record. 1327 */ 1328 splx(s); 1329 return (0); 1330 } 1331 /* 1332 * No remaining claims to this record; unlink and free it. 1333 */ 1334 LIST_REMOVE(enm, enm_list); 1335 free(enm, M_IFMADDR); 1336 ec->ec_multicnt--; 1337 splx(s); 1338 /* 1339 * Return ENETRESET to inform the driver that the list has changed 1340 * and its reception filter should be adjusted accordingly. 1341 */ 1342 return (ENETRESET); 1343 } 1344 1345 /* 1346 * Common ioctls for Ethernet interfaces. Note, we must be 1347 * called at splnet(). 1348 */ 1349 int 1350 ether_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1351 { 1352 struct ethercom *ec = (void *) ifp; 1353 struct ifreq *ifr = (struct ifreq *)data; 1354 struct ifaddr *ifa = (struct ifaddr *)data; 1355 int error = 0; 1356 1357 switch (cmd) { 1358 case SIOCSIFADDR: 1359 ifp->if_flags |= IFF_UP; 1360 switch (ifa->ifa_addr->sa_family) { 1361 case AF_LINK: 1362 { 1363 struct sockaddr_dl *sdl = 1364 (struct sockaddr_dl *) ifa->ifa_addr; 1365 1366 if (sdl->sdl_type != IFT_ETHER || 1367 sdl->sdl_alen != ifp->if_addrlen) { 1368 error = EINVAL; 1369 break; 1370 } 1371 1372 memcpy(LLADDR(ifp->if_sadl), LLADDR(sdl), 1373 ifp->if_addrlen); 1374 1375 /* Set new address. */ 1376 error = (*ifp->if_init)(ifp); 1377 break; 1378 } 1379 #ifdef INET 1380 case AF_INET: 1381 if ((ifp->if_flags & IFF_RUNNING) == 0 && 1382 (error = (*ifp->if_init)(ifp)) != 0) 1383 break; 1384 arp_ifinit(ifp, ifa); 1385 break; 1386 #endif /* INET */ 1387 #ifdef NS 1388 case AF_NS: 1389 { 1390 struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; 1391 1392 if (ns_nullhost(*ina)) 1393 ina->x_host = *(union ns_host *) 1394 LLADDR(ifp->if_sadl); 1395 else 1396 memcpy(LLADDR(ifp->if_sadl), 1397 ina->x_host.c_host, ifp->if_addrlen); 1398 /* Set new address. */ 1399 error = (*ifp->if_init)(ifp); 1400 break; 1401 } 1402 #endif /* NS */ 1403 default: 1404 if ((ifp->if_flags & IFF_RUNNING) == 0) 1405 error = (*ifp->if_init)(ifp); 1406 break; 1407 } 1408 break; 1409 1410 case SIOCGIFADDR: 1411 memcpy(((struct sockaddr *)&ifr->ifr_data)->sa_data, 1412 LLADDR(ifp->if_sadl), ETHER_ADDR_LEN); 1413 break; 1414 1415 case SIOCSIFMTU: 1416 { 1417 int maxmtu; 1418 1419 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1420 maxmtu = ETHERMTU_JUMBO; 1421 else 1422 maxmtu = ETHERMTU; 1423 1424 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1425 error = EINVAL; 1426 else { 1427 ifp->if_mtu = ifr->ifr_mtu; 1428 1429 /* Make sure the device notices the MTU change. */ 1430 if (ifp->if_flags & IFF_UP) 1431 error = (*ifp->if_init)(ifp); 1432 } 1433 break; 1434 } 1435 1436 case SIOCSIFFLAGS: 1437 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_RUNNING) { 1438 /* 1439 * If interface is marked down and it is running, 1440 * then stop and disable it. 1441 */ 1442 (*ifp->if_stop)(ifp, 1); 1443 } else if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_UP) { 1444 /* 1445 * If interface is marked up and it is stopped, then 1446 * start it. 1447 */ 1448 error = (*ifp->if_init)(ifp); 1449 } else if ((ifp->if_flags & IFF_UP) != 0) { 1450 /* 1451 * Reset the interface to pick up changes in any other 1452 * flags that affect the hardware state. 1453 */ 1454 error = (*ifp->if_init)(ifp); 1455 } 1456 break; 1457 1458 case SIOCADDMULTI: 1459 error = ether_addmulti(ifr, ec); 1460 break; 1461 1462 case SIOCDELMULTI: 1463 error = ether_delmulti(ifr, ec); 1464 break; 1465 1466 default: 1467 error = ENOTTY; 1468 } 1469 1470 return (error); 1471 } 1472
Indexes created Tue Sep 23 02:09:52 GMT 2025