if_ethersubr.c revision 1.86
1 /* $NetBSD: if_ethersubr.c,v 1.86 2001/06/29 18:12:09 thorpej Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1982, 1989, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)if_ethersubr.c 8.2 (Berkeley) 4/4/96 65 */ 66 67 #include "opt_inet.h" 68 #include "opt_atalk.h" 69 #include "opt_ccitt.h" 70 #include "opt_llc.h" 71 #include "opt_iso.h" 72 #include "opt_ns.h" 73 #include "opt_gateway.h" 74 #include "opt_pfil_hooks.h" 75 #include "vlan.h" 76 #include "pppoe.h" 77 #include "bridge.h" 78 #include "bpfilter.h" 79 80 #include <sys/param.h> 81 #include <sys/systm.h> 82 #include <sys/kernel.h> 83 #include <sys/callout.h> 84 #include <sys/malloc.h> 85 #include <sys/mbuf.h> 86 #include <sys/protosw.h> 87 #include <sys/socket.h> 88 #include <sys/ioctl.h> 89 #include <sys/errno.h> 90 #include <sys/syslog.h> 91 92 #include <machine/cpu.h> 93 94 #include <net/if.h> 95 #include <net/netisr.h> 96 #include <net/route.h> 97 #include <net/if_llc.h> 98 #include <net/if_dl.h> 99 #include <net/if_types.h> 100 101 #if NBPFILTER > 0 102 #include <net/bpf.h> 103 #endif 104 105 #include <net/if_ether.h> 106 #if NVLAN > 0 107 #include <net/if_vlanvar.h> 108 #endif 109 110 #if NPPPOE > 0 111 #include <net/if_pppoe.h> 112 #endif 113 114 #if NBRIDGE > 0 115 #include <net/if_bridgevar.h> 116 #endif 117 118 #include <netinet/in.h> 119 #ifdef INET 120 #include <netinet/in_var.h> 121 #endif 122 #include <netinet/if_inarp.h> 123 124 #ifdef INET6 125 #ifndef INET 126 #include <netinet/in.h> 127 #endif 128 #include <netinet6/in6_var.h> 129 #include <netinet6/nd6.h> 130 #endif 131 132 #ifdef NS 133 #include <netns/ns.h> 134 #include <netns/ns_if.h> 135 #endif 136 137 #ifdef IPX 138 #include <netipx/ipx.h> 139 #include <netipx/ipx_if.h> 140 #endif 141 142 #ifdef ISO 143 #include <netiso/argo_debug.h> 144 #include <netiso/iso.h> 145 #include <netiso/iso_var.h> 146 #include <netiso/iso_snpac.h> 147 #endif 148 149 #ifdef LLC 150 #include <netccitt/dll.h> 151 #include <netccitt/llc_var.h> 152 #endif 153 154 #if defined(LLC) && defined(CCITT) 155 extern struct ifqueue pkintrq; 156 #endif 157 158 #ifdef NETATALK 159 #include <netatalk/at.h> 160 #include <netatalk/at_var.h> 161 #include <netatalk/at_extern.h> 162 163 #define llc_snap_org_code llc_un.type_snap.org_code 164 #define llc_snap_ether_type llc_un.type_snap.ether_type 165 166 extern u_char at_org_code[3]; 167 extern u_char aarp_org_code[3]; 168 #endif /* NETATALK */ 169 170 u_char etherbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 171 #define senderr(e) { error = (e); goto bad;} 172 173 #define SIN(x) ((struct sockaddr_in *)x) 174 175 static int ether_output __P((struct ifnet *, struct mbuf *, 176 struct sockaddr *, struct rtentry *)); 177 static void ether_input __P((struct ifnet *, struct mbuf *)); 178 179 /* 180 * Ethernet output routine. 181 * Encapsulate a packet of type family for the local net. 182 * Assumes that ifp is actually pointer to ethercom structure. 183 */ 184 static int 185 ether_output(struct ifnet *ifp, struct mbuf *m0, struct sockaddr *dst, 186 struct rtentry *rt0) 187 { 188 u_int16_t etype = 0; 189 int s, len, error = 0, hdrcmplt = 0; 190 u_char esrc[6], edst[6]; 191 struct mbuf *m = m0; 192 struct rtentry *rt; 193 struct mbuf *mcopy = (struct mbuf *)0; 194 struct ether_header *eh; 195 ALTQ_DECL(struct altq_pktattr pktattr;) 196 #ifdef INET 197 struct arphdr *ah; 198 #endif /* INET */ 199 #ifdef NETATALK 200 struct at_ifaddr *aa; 201 #endif /* NETATALK */ 202 short mflags; 203 204 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 205 senderr(ENETDOWN); 206 if ((rt = rt0) != NULL) { 207 if ((rt->rt_flags & RTF_UP) == 0) { 208 if ((rt0 = rt = rtalloc1(dst, 1)) != NULL) { 209 rt->rt_refcnt--; 210 if (rt->rt_ifp != ifp) 211 return (*rt->rt_ifp->if_output) 212 (ifp, m0, dst, rt); 213 } else 214 senderr(EHOSTUNREACH); 215 } 216 if ((rt->rt_flags & RTF_GATEWAY) && dst->sa_family != AF_NS) { 217 if (rt->rt_gwroute == 0) 218 goto lookup; 219 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 220 rtfree(rt); rt = rt0; 221 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1); 222 if ((rt = rt->rt_gwroute) == 0) 223 senderr(EHOSTUNREACH); 224 /* the "G" test below also prevents rt == rt0 */ 225 if ((rt->rt_flags & RTF_GATEWAY) || 226 (rt->rt_ifp != ifp)) { 227 rt->rt_refcnt--; 228 rt0->rt_gwroute = 0; 229 senderr(EHOSTUNREACH); 230 } 231 } 232 } 233 if (rt->rt_flags & RTF_REJECT) 234 if (rt->rt_rmx.rmx_expire == 0 || 235 time.tv_sec < rt->rt_rmx.rmx_expire) 236 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 237 } 238 239 switch (dst->sa_family) { 240 241 #ifdef INET 242 case AF_INET: 243 if (m->m_flags & M_BCAST) 244 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 245 sizeof(edst)); 246 247 else if (m->m_flags & M_MCAST) { 248 ETHER_MAP_IP_MULTICAST(&SIN(dst)->sin_addr, 249 (caddr_t)edst) 250 251 } else if (!arpresolve(ifp, rt, m, dst, edst)) 252 return (0); /* if not yet resolved */ 253 /* If broadcasting on a simplex interface, loopback a copy */ 254 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 255 mcopy = m_copy(m, 0, (int)M_COPYALL); 256 etype = htons(ETHERTYPE_IP); 257 break; 258 259 case AF_ARP: 260 ah = mtod(m, struct arphdr *); 261 if (m->m_flags & M_BCAST) 262 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 263 sizeof(edst)); 264 else 265 bcopy((caddr_t)ar_tha(ah), 266 (caddr_t)edst, sizeof(edst)); 267 268 ah->ar_hrd = htons(ARPHRD_ETHER); 269 270 switch(ntohs(ah->ar_op)) { 271 case ARPOP_REVREQUEST: 272 case ARPOP_REVREPLY: 273 etype = htons(ETHERTYPE_REVARP); 274 break; 275 276 case ARPOP_REQUEST: 277 case ARPOP_REPLY: 278 default: 279 etype = htons(ETHERTYPE_ARP); 280 } 281 282 break; 283 #endif 284 #ifdef INET6 285 case AF_INET6: 286 #ifdef OLDIP6OUTPUT 287 if (!nd6_resolve(ifp, rt, m, dst, (u_char *)edst)) 288 return(0); /* if not yet resolves */ 289 #else 290 if (!nd6_storelladdr(ifp, rt, m, dst, (u_char *)edst)){ 291 /* something bad happened */ 292 return(0); 293 } 294 #endif /* OLDIP6OUTPUT */ 295 etype = htons(ETHERTYPE_IPV6); 296 break; 297 #endif 298 #ifdef NETATALK 299 case AF_APPLETALK: 300 if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) { 301 #ifdef NETATALKDEBUG 302 printf("aarpresolv failed\n"); 303 #endif /* NETATALKDEBUG */ 304 return (0); 305 } 306 /* 307 * ifaddr is the first thing in at_ifaddr 308 */ 309 aa = (struct at_ifaddr *) at_ifawithnet( 310 (struct sockaddr_at *)dst, ifp); 311 if (aa == NULL) 312 goto bad; 313 314 /* 315 * In the phase 2 case, we need to prepend an mbuf for the 316 * llc header. Since we must preserve the value of m, 317 * which is passed to us by value, we m_copy() the first 318 * mbuf, and use it for our llc header. 319 */ 320 if (aa->aa_flags & AFA_PHASE2) { 321 struct llc llc; 322 323 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 324 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 325 llc.llc_control = LLC_UI; 326 bcopy(at_org_code, llc.llc_snap_org_code, 327 sizeof(llc.llc_snap_org_code)); 328 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 329 bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc)); 330 } else { 331 etype = htons(ETHERTYPE_ATALK); 332 } 333 break; 334 #endif /* NETATALK */ 335 #ifdef NS 336 case AF_NS: 337 etype = htons(ETHERTYPE_NS); 338 bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host), 339 (caddr_t)edst, sizeof (edst)); 340 if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst))) 341 return (looutput(ifp, m, dst, rt)); 342 /* If broadcasting on a simplex interface, loopback a copy */ 343 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 344 mcopy = m_copy(m, 0, (int)M_COPYALL); 345 break; 346 #endif 347 #ifdef IPX 348 case AF_IPX: 349 etype = htons(ETHERTYPE_IPX); 350 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 351 (caddr_t)edst, sizeof (edst)); 352 /* If broadcasting on a simplex interface, loopback a copy */ 353 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 354 mcopy = m_copy(m, 0, (int)M_COPYALL); 355 break; 356 #endif 357 #ifdef ISO 358 case AF_ISO: { 359 int snpalen; 360 struct llc *l; 361 struct sockaddr_dl *sdl; 362 363 if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) && 364 sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) { 365 bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst)); 366 } else { 367 error = iso_snparesolve(ifp, (struct sockaddr_iso *)dst, 368 (char *)edst, &snpalen); 369 if (error) 370 goto bad; /* Not Resolved */ 371 } 372 /* If broadcasting on a simplex interface, loopback a copy */ 373 if (*edst & 1) 374 m->m_flags |= (M_BCAST|M_MCAST); 375 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) && 376 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 377 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 378 if (mcopy) { 379 eh = mtod(mcopy, struct ether_header *); 380 bcopy((caddr_t)edst, 381 (caddr_t)eh->ether_dhost, sizeof (edst)); 382 bcopy(LLADDR(ifp->if_sadl), 383 (caddr_t)eh->ether_shost, sizeof (edst)); 384 } 385 } 386 M_PREPEND(m, 3, M_DONTWAIT); 387 if (m == NULL) 388 return (0); 389 l = mtod(m, struct llc *); 390 l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP; 391 l->llc_control = LLC_UI; 392 #ifdef ARGO_DEBUG 393 if (argo_debug[D_ETHER]) { 394 int i; 395 printf("unoutput: sending pkt to: "); 396 for (i=0; i<6; i++) 397 printf("%x ", edst[i] & 0xff); 398 printf("\n"); 399 } 400 #endif 401 } break; 402 #endif /* ISO */ 403 #ifdef LLC 404 /* case AF_NSAP: */ 405 case AF_CCITT: { 406 struct sockaddr_dl *sdl = 407 (struct sockaddr_dl *) rt -> rt_gateway; 408 409 if (sdl && sdl->sdl_family == AF_LINK 410 && sdl->sdl_alen > 0) { 411 bcopy(LLADDR(sdl), (char *)edst, 412 sizeof(edst)); 413 } else goto bad; /* Not a link interface ? Funny ... */ 414 if ((ifp->if_flags & IFF_SIMPLEX) && (*edst & 1) && 415 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 416 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 417 if (mcopy) { 418 eh = mtod(mcopy, struct ether_header *); 419 bcopy((caddr_t)edst, 420 (caddr_t)eh->ether_dhost, sizeof (edst)); 421 bcopy(LLADDR(ifp->if_sadl), 422 (caddr_t)eh->ether_shost, sizeof (edst)); 423 } 424 } 425 #ifdef LLC_DEBUG 426 { 427 int i; 428 struct llc *l = mtod(m, struct llc *); 429 430 printf("ether_output: sending LLC2 pkt to: "); 431 for (i=0; i<6; i++) 432 printf("%x ", edst[i] & 0xff); 433 printf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n", 434 m->m_pkthdr.len, l->llc_dsap & 0xff, l->llc_ssap &0xff, 435 l->llc_control & 0xff); 436 437 } 438 #endif /* LLC_DEBUG */ 439 } break; 440 #endif /* LLC */ 441 442 case pseudo_AF_HDRCMPLT: 443 hdrcmplt = 1; 444 eh = (struct ether_header *)dst->sa_data; 445 bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, sizeof (esrc)); 446 /* FALLTHROUGH */ 447 448 case AF_UNSPEC: 449 eh = (struct ether_header *)dst->sa_data; 450 bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, sizeof (edst)); 451 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 452 etype = eh->ether_type; 453 break; 454 455 default: 456 printf("%s: can't handle af%d\n", ifp->if_xname, 457 dst->sa_family); 458 senderr(EAFNOSUPPORT); 459 } 460 461 if (mcopy) 462 (void) looutput(ifp, mcopy, dst, rt); 463 464 /* If no ether type is set, this must be a 802.2 formatted packet. 465 */ 466 if (etype == 0) 467 etype = htons(m->m_pkthdr.len); 468 /* 469 * Add local net header. If no space in first mbuf, 470 * allocate another. 471 */ 472 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 473 if (m == 0) 474 senderr(ENOBUFS); 475 eh = mtod(m, struct ether_header *); 476 bcopy((caddr_t)&etype,(caddr_t)&eh->ether_type, 477 sizeof(eh->ether_type)); 478 bcopy((caddr_t)edst, (caddr_t)eh->ether_dhost, sizeof (edst)); 479 if (hdrcmplt) 480 bcopy((caddr_t)esrc, (caddr_t)eh->ether_shost, 481 sizeof(eh->ether_shost)); 482 else 483 bcopy(LLADDR(ifp->if_sadl), (caddr_t)eh->ether_shost, 484 sizeof(eh->ether_shost)); 485 486 #ifdef PFIL_HOOKS 487 if ((error = pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 488 return (error); 489 if (m == NULL) 490 return (0); 491 #endif 492 493 #if NBRIDGE > 0 494 /* 495 * Bridges require special output handling. 496 */ 497 if (ifp->if_bridge) 498 return (bridge_output(ifp, m, NULL, NULL)); 499 #endif 500 501 #ifdef ALTQ 502 /* 503 * If ALTQ is enabled on the parent interface, do 504 * classification; the queueing discipline might not 505 * require classification, but might require the 506 * address family/header pointer in the pktattr. 507 */ 508 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 509 altq_etherclassify(&ifp->if_snd, m, &pktattr); 510 #endif 511 512 mflags = m->m_flags; 513 len = m->m_pkthdr.len; 514 s = splnet(); 515 /* 516 * Queue message on interface, and start output if interface 517 * not yet active. 518 */ 519 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, error); 520 if (error) { 521 /* mbuf is already freed */ 522 splx(s); 523 return (error); 524 } 525 ifp->if_obytes += len; 526 if (mflags & M_MCAST) 527 ifp->if_omcasts++; 528 if ((ifp->if_flags & IFF_OACTIVE) == 0) 529 (*ifp->if_start)(ifp); 530 splx(s); 531 return (error); 532 533 bad: 534 if (m) 535 m_freem(m); 536 return (error); 537 } 538 539 #ifdef ALTQ 540 /* 541 * This routine is a slight hack to allow a packet to be classified 542 * if the Ethernet headers are present. It will go away when ALTQ's 543 * classification engine understands link headers. 544 */ 545 void 546 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m, 547 struct altq_pktattr *pktattr) 548 { 549 struct ether_header *eh; 550 u_int16_t ether_type; 551 int hlen, af, hdrsize; 552 caddr_t hdr; 553 554 hlen = ETHER_HDR_LEN; 555 eh = mtod(m, struct ether_header *); 556 557 ether_type = htons(eh->ether_type); 558 559 if (ether_type < ETHERMTU) { 560 /* LLC/SNAP */ 561 struct llc *llc = (struct llc *)(eh + 1); 562 hlen += 8; 563 564 if (m->m_len < hlen || 565 llc->llc_dsap != LLC_SNAP_LSAP || 566 llc->llc_ssap != LLC_SNAP_LSAP || 567 llc->llc_control != LLC_UI) { 568 /* Not SNAP. */ 569 goto bad; 570 } 571 572 ether_type = htons(llc->llc_un.type_snap.ether_type); 573 } 574 575 switch (ether_type) { 576 case ETHERTYPE_IP: 577 af = AF_INET; 578 hdrsize = 20; /* sizeof(struct ip) */ 579 break; 580 581 case ETHERTYPE_IPV6: 582 af = AF_INET6; 583 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 584 break; 585 586 default: 587 af = AF_UNSPEC; 588 hdrsize = 0; 589 break; 590 } 591 592 if (m->m_len < (hlen + hdrsize)) { 593 /* 594 * Ethernet and protocol header not in a single 595 * mbuf. We can't cope with this situation right 596 * now (but it shouldn't ever happen, really, anyhow). 597 * XXX Should use m_pulldown(). 598 */ 599 printf("altq_etherclassify: headers span multiple mbufs: " 600 "%d < %d\n", m->m_len, (hlen + hdrsize)); 601 goto bad; 602 } 603 604 m->m_data += hlen; 605 m->m_len -= hlen; 606 607 hdr = mtod(m, caddr_t); 608 609 if (ALTQ_NEEDS_CLASSIFY(ifq)) 610 pktattr->pattr_class = 611 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 612 pktattr->pattr_af = af; 613 pktattr->pattr_hdr = hdr; 614 615 m->m_data -= hlen; 616 m->m_len += hlen; 617 618 return; 619 620 bad: 621 pktattr->pattr_class = NULL; 622 pktattr->pattr_hdr = NULL; 623 pktattr->pattr_af = AF_UNSPEC; 624 } 625 #endif /* ALTQ */ 626 627 /* 628 * Process a received Ethernet packet; 629 * the packet is in the mbuf chain m with 630 * the ether header. 631 */ 632 static void 633 ether_input(struct ifnet *ifp, struct mbuf *m) 634 { 635 struct ifqueue *inq; 636 u_int16_t etype; 637 int s; 638 struct ether_header *eh; 639 struct mbuf *n; 640 #if defined (ISO) || defined (LLC) || defined(NETATALK) 641 struct llc *l; 642 #endif 643 644 if ((ifp->if_flags & IFF_UP) == 0) { 645 m_freem(m); 646 return; 647 } 648 649 eh = mtod(m, struct ether_header *); 650 etype = ntohs(eh->ether_type); 651 652 /* 653 * Determine if the packet is within its size limits. 654 */ 655 if (m->m_pkthdr.len > 656 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 657 printf("%s: discarding oversize frame (len=%d)\n", 658 ifp->if_xname, m->m_pkthdr.len); 659 m_freem(m); 660 return; 661 } 662 663 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 664 /* 665 * If this is not a simplex interface, drop the packet 666 * if it came from us. 667 */ 668 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 669 memcmp(LLADDR(ifp->if_sadl), eh->ether_shost, 670 ETHER_ADDR_LEN) == 0) { 671 m_freem(m); 672 return; 673 } 674 675 if (memcmp(etherbroadcastaddr, 676 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 677 m->m_flags |= M_BCAST; 678 else 679 m->m_flags |= M_MCAST; 680 ifp->if_imcasts++; 681 } 682 683 /* If the CRC is still on the packet, trim it off. */ 684 if (m->m_flags & M_HASFCS) { 685 m_adj(m, -ETHER_CRC_LEN); 686 m->m_flags &= ~M_HASFCS; 687 } 688 689 ifp->if_ibytes += m->m_pkthdr.len; 690 691 #if NBRIDGE > 0 692 /* 693 * Tap the packet off here for a bridge. bridge_input() 694 * will return NULL if it has consumed the packet, otherwise 695 * it gets processed as normal. Note that bridge_input() 696 * will always return the original packet if we need to 697 * process it locally. 698 */ 699 if (ifp->if_bridge) { 700 m = bridge_input(ifp, m); 701 if (m == NULL) 702 return; 703 704 /* 705 * Bridge has determined that the packet is for us. 706 * Update our interface pointer -- we may have had 707 * to "bridge" the packet locally. 708 */ 709 ifp = m->m_pkthdr.rcvif; 710 } 711 #endif /* NBRIDGE > 0 */ 712 713 /* 714 * XXX This comparison is redundant if we are a bridge 715 * XXX and processing the packet locally. 716 */ 717 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0 && 718 (ifp->if_flags & IFF_PROMISC) != 0 && 719 memcmp(LLADDR(ifp->if_sadl), eh->ether_dhost, 720 ETHER_ADDR_LEN) != 0) { 721 m_freem(m); 722 return; 723 } 724 725 #ifdef PFIL_HOOKS 726 if (pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 727 return; 728 if (m == NULL) 729 return; 730 731 eh = mtod(m, struct ether_header *); 732 etype = ntohs(eh->ether_type); 733 #endif 734 735 /* Check if the mbuf has a VLAN tag */ 736 n = m_aux_find(m, AF_LINK, ETHERTYPE_VLAN); 737 if (n) { 738 #if NVLAN > 0 739 /* 740 * vlan_input() will either recursively call ether_input() 741 * or drop the packet. 742 */ 743 if (((struct ethercom *)ifp)->ec_nvlans != 0) 744 vlan_input(ifp, m); 745 else 746 #endif 747 m_freem(m); 748 return; 749 } 750 751 /* 752 * Handle protocols that expect to have the Ethernet header 753 * (and possibly FCS) intact. 754 */ 755 switch (etype) { 756 #if NVLAN > 0 757 case ETHERTYPE_VLAN: 758 /* 759 * vlan_input() will either recursively call ether_input() 760 * or drop the packet. 761 */ 762 if (((struct ethercom *)ifp)->ec_nvlans != 0) 763 vlan_input(ifp, m); 764 else 765 m_freem(m); 766 return; 767 #endif /* NVLAN > 0 */ 768 #if NPPPOE > 0 769 case ETHERTYPE_PPPOEDISC: 770 case ETHERTYPE_PPPOE: 771 if (etype == ETHERTYPE_PPPOEDISC) 772 inq = &ppoediscinq; 773 else 774 inq = &ppoeinq; 775 s = splnet(); 776 if (IF_QFULL(inq)) { 777 IF_DROP(inq); 778 m_freem(m); 779 } else 780 IF_ENQUEUE(inq, m); 781 splx(s); 782 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 783 if (!callout_active(&pppoe_softintr)) 784 callout_reset(&pppoe_softintr, 1, pppoe_softintr_handler, NULL); 785 #else 786 softintr_schedule(pppoe_softintr); 787 #endif 788 return; 789 #endif /* NPPPOE > 0 */ 790 default: 791 ; /* Nothing. */ 792 } 793 794 /* Strip off the Ethernet header. */ 795 m_adj(m, sizeof(struct ether_header)); 796 797 /* If the CRC is still on the packet, trim it off. */ 798 if (m->m_flags & M_HASFCS) { 799 m_adj(m, -ETHER_CRC_LEN); 800 m->m_flags &= ~M_HASFCS; 801 } 802 803 switch (etype) { 804 #ifdef INET 805 case ETHERTYPE_IP: 806 #ifdef GATEWAY 807 if (ipflow_fastforward(m)) 808 return; 809 #endif 810 schednetisr(NETISR_IP); 811 inq = &ipintrq; 812 break; 813 814 case ETHERTYPE_ARP: 815 schednetisr(NETISR_ARP); 816 inq = &arpintrq; 817 break; 818 819 case ETHERTYPE_REVARP: 820 revarpinput(m); /* XXX queue? */ 821 return; 822 #endif 823 #ifdef INET6 824 case ETHERTYPE_IPV6: 825 schednetisr(NETISR_IPV6); 826 inq = &ip6intrq; 827 break; 828 #endif 829 #ifdef NS 830 case ETHERTYPE_NS: 831 schednetisr(NETISR_NS); 832 inq = &nsintrq; 833 break; 834 835 #endif 836 #ifdef IPX 837 case ETHERTYPE_IPX: 838 schednetisr(NETISR_IPX); 839 inq = &ipxintrq; 840 break; 841 #endif 842 #ifdef NETATALK 843 case ETHERTYPE_ATALK: 844 schednetisr(NETISR_ATALK); 845 inq = &atintrq1; 846 break; 847 case ETHERTYPE_AARP: 848 /* probably this should be done with a NETISR as well */ 849 aarpinput(ifp, m); /* XXX */ 850 return; 851 #endif /* NETATALK */ 852 default: 853 #if defined (ISO) || defined (LLC) || defined (NETATALK) 854 if (etype > ETHERMTU) 855 goto dropanyway; 856 l = mtod(m, struct llc *); 857 switch (l->llc_dsap) { 858 #ifdef NETATALK 859 case LLC_SNAP_LSAP: 860 switch (l->llc_control) { 861 case LLC_UI: 862 if (l->llc_ssap != LLC_SNAP_LSAP) { 863 goto dropanyway; 864 } 865 866 if (Bcmp(&(l->llc_snap_org_code)[0], 867 at_org_code, sizeof(at_org_code)) == 0 && 868 ntohs(l->llc_snap_ether_type) == 869 ETHERTYPE_ATALK) { 870 inq = &atintrq2; 871 m_adj(m, sizeof(struct llc)); 872 schednetisr(NETISR_ATALK); 873 break; 874 } 875 876 if (Bcmp(&(l->llc_snap_org_code)[0], 877 aarp_org_code, 878 sizeof(aarp_org_code)) == 0 && 879 ntohs(l->llc_snap_ether_type) == 880 ETHERTYPE_AARP) { 881 m_adj( m, sizeof(struct llc)); 882 aarpinput(ifp, m); /* XXX */ 883 return; 884 } 885 886 default: 887 goto dropanyway; 888 } 889 break; 890 #endif /* NETATALK */ 891 #ifdef ISO 892 case LLC_ISO_LSAP: 893 switch (l->llc_control) { 894 case LLC_UI: 895 /* LLC_UI_P forbidden in class 1 service */ 896 if ((l->llc_dsap == LLC_ISO_LSAP) && 897 (l->llc_ssap == LLC_ISO_LSAP)) { 898 /* LSAP for ISO */ 899 if (m->m_pkthdr.len > etype) 900 m_adj(m, etype - m->m_pkthdr.len); 901 m->m_data += 3; /* XXX */ 902 m->m_len -= 3; /* XXX */ 903 m->m_pkthdr.len -= 3; /* XXX */ 904 M_PREPEND(m, sizeof *eh, M_DONTWAIT); 905 if (m == 0) 906 return; 907 *mtod(m, struct ether_header *) = *eh; 908 #ifdef ARGO_DEBUG 909 if (argo_debug[D_ETHER]) 910 printf("clnp packet"); 911 #endif 912 schednetisr(NETISR_ISO); 913 inq = &clnlintrq; 914 break; 915 } 916 goto dropanyway; 917 918 case LLC_XID: 919 case LLC_XID_P: 920 if(m->m_len < 6) 921 goto dropanyway; 922 l->llc_window = 0; 923 l->llc_fid = 9; 924 l->llc_class = 1; 925 l->llc_dsap = l->llc_ssap = 0; 926 /* Fall through to */ 927 case LLC_TEST: 928 case LLC_TEST_P: 929 { 930 struct sockaddr sa; 931 struct ether_header *eh2; 932 int i; 933 u_char c = l->llc_dsap; 934 935 l->llc_dsap = l->llc_ssap; 936 l->llc_ssap = c; 937 if (m->m_flags & (M_BCAST | M_MCAST)) 938 bcopy(LLADDR(ifp->if_sadl), 939 (caddr_t)eh->ether_dhost, 6); 940 sa.sa_family = AF_UNSPEC; 941 sa.sa_len = sizeof(sa); 942 eh2 = (struct ether_header *)sa.sa_data; 943 for (i = 0; i < 6; i++) { 944 eh2->ether_shost[i] = c = 945 eh->ether_dhost[i]; 946 eh2->ether_dhost[i] = 947 eh->ether_dhost[i] = 948 eh->ether_shost[i]; 949 eh->ether_shost[i] = c; 950 } 951 ifp->if_output(ifp, m, &sa, NULL); 952 return; 953 } 954 default: 955 m_freem(m); 956 return; 957 } 958 break; 959 #endif /* ISO */ 960 #ifdef LLC 961 case LLC_X25_LSAP: 962 { 963 if (m->m_pkthdr.len > etype) 964 m_adj(m, etype - m->m_pkthdr.len); 965 M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT); 966 if (m == 0) 967 return; 968 if ( !sdl_sethdrif(ifp, eh->ether_shost, LLC_X25_LSAP, 969 eh->ether_dhost, LLC_X25_LSAP, 6, 970 mtod(m, struct sdl_hdr *))) 971 panic("ETHER cons addr failure"); 972 mtod(m, struct sdl_hdr *)->sdlhdr_len = etype; 973 #ifdef LLC_DEBUG 974 printf("llc packet\n"); 975 #endif /* LLC_DEBUG */ 976 schednetisr(NETISR_CCITT); 977 inq = &llcintrq; 978 break; 979 } 980 #endif /* LLC */ 981 dropanyway: 982 default: 983 m_freem(m); 984 return; 985 } 986 #else /* ISO || LLC || NETATALK*/ 987 m_freem(m); 988 return; 989 #endif /* ISO || LLC || NETATALK*/ 990 } 991 992 s = splnet(); 993 if (IF_QFULL(inq)) { 994 IF_DROP(inq); 995 m_freem(m); 996 } else 997 IF_ENQUEUE(inq, m); 998 splx(s); 999 } 1000 1001 /* 1002 * Convert Ethernet address to printable (loggable) representation. 1003 */ 1004 static char digits[] = "0123456789abcdef"; 1005 char * 1006 ether_sprintf(const u_char *ap) 1007 { 1008 static char etherbuf[18]; 1009 char *cp = etherbuf; 1010 int i; 1011 1012 for (i = 0; i < 6; i++) { 1013 *cp++ = digits[*ap >> 4]; 1014 *cp++ = digits[*ap++ & 0xf]; 1015 *cp++ = ':'; 1016 } 1017 *--cp = 0; 1018 return (etherbuf); 1019 } 1020 1021 /* 1022 * Perform common duties while attaching to interface list 1023 */ 1024 void 1025 ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 1026 { 1027 1028 ifp->if_type = IFT_ETHER; 1029 ifp->if_addrlen = ETHER_ADDR_LEN; 1030 ifp->if_hdrlen = 14; 1031 ifp->if_dlt = DLT_EN10MB; 1032 ifp->if_mtu = ETHERMTU; 1033 ifp->if_output = ether_output; 1034 ifp->if_input = ether_input; 1035 if (ifp->if_baudrate == 0) 1036 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 1037 1038 if_alloc_sadl(ifp); 1039 memcpy(LLADDR(ifp->if_sadl), lla, ifp->if_addrlen); 1040 1041 LIST_INIT(&((struct ethercom *)ifp)->ec_multiaddrs); 1042 ifp->if_broadcastaddr = etherbroadcastaddr; 1043 #if NBPFILTER > 0 1044 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 1045 #endif 1046 } 1047 1048 void 1049 ether_ifdetach(struct ifnet *ifp) 1050 { 1051 struct ethercom *ec = (void *) ifp; 1052 struct ether_multi *enm; 1053 int s; 1054 1055 #if NBPFILTER > 0 1056 bpfdetach(ifp); 1057 #endif 1058 1059 #if NVLAN > 0 1060 if (ec->ec_nvlans) 1061 vlan_ifdetach(ifp); 1062 #endif 1063 1064 s = splnet(); 1065 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1066 LIST_REMOVE(enm, enm_list); 1067 free(enm, M_IFADDR); 1068 ec->ec_multicnt--; 1069 } 1070 splx(s); 1071 1072 if_free_sadl(ifp); 1073 } 1074 1075 #if 0 1076 /* 1077 * This is for reference. We have a table-driven version 1078 * of the little-endian crc32 generator, which is faster 1079 * than the double-loop. 1080 */ 1081 u_int32_t 1082 ether_crc32_le(const u_int8_t *buf, size_t len) 1083 { 1084 u_int32_t c, crc, carry; 1085 size_t i, j; 1086 1087 crc = 0xffffffffU; /* initial value */ 1088 1089 for (i = 0; i < len; i++) { 1090 c = buf[i]; 1091 for (j = 0; j < 8; j++) { 1092 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1093 crc >>= 1; 1094 c >>= 1; 1095 if (carry) 1096 crc = (crc ^ ETHER_CRC_POLY_LE); 1097 } 1098 } 1099 1100 return (crc); 1101 } 1102 #else 1103 u_int32_t 1104 ether_crc32_le(const u_int8_t *buf, size_t len) 1105 { 1106 static const u_int32_t crctab[] = { 1107 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1108 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1109 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1110 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1111 }; 1112 u_int32_t crc; 1113 int i; 1114 1115 crc = 0xffffffffU; /* initial value */ 1116 1117 for (i = 0; i < len; i++) { 1118 crc ^= buf[i]; 1119 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1120 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1121 } 1122 1123 return (crc); 1124 } 1125 #endif 1126 1127 u_int32_t 1128 ether_crc32_be(const u_int8_t *buf, size_t len) 1129 { 1130 u_int32_t c, crc, carry; 1131 size_t i, j; 1132 1133 crc = 0xffffffffU; /* initial value */ 1134 1135 for (i = 0; i < len; i++) { 1136 c = buf[i]; 1137 for (j = 0; j < 8; j++) { 1138 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1139 crc <<= 1; 1140 c >>= 1; 1141 if (carry) 1142 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1143 } 1144 } 1145 1146 return (crc); 1147 } 1148 1149 #ifdef INET 1150 u_char ether_ipmulticast_min[6] = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1151 u_char ether_ipmulticast_max[6] = { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1152 #endif 1153 #ifdef INET6 1154 u_char ether_ip6multicast_min[6] = { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1155 u_char ether_ip6multicast_max[6] = { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1156 #endif 1157 1158 /* 1159 * Convert a sockaddr into an Ethernet address or range of Ethernet 1160 * addresses. 1161 */ 1162 int 1163 ether_multiaddr(struct sockaddr *sa, u_int8_t addrlo[ETHER_ADDR_LEN], 1164 u_int8_t addrhi[ETHER_ADDR_LEN]) 1165 { 1166 #ifdef INET 1167 struct sockaddr_in *sin; 1168 #endif /* INET */ 1169 #ifdef INET6 1170 struct sockaddr_in6 *sin6; 1171 #endif /* INET6 */ 1172 1173 switch (sa->sa_family) { 1174 1175 case AF_UNSPEC: 1176 bcopy(sa->sa_data, addrlo, ETHER_ADDR_LEN); 1177 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1178 break; 1179 1180 #ifdef INET 1181 case AF_INET: 1182 sin = satosin(sa); 1183 if (sin->sin_addr.s_addr == INADDR_ANY) { 1184 /* 1185 * An IP address of INADDR_ANY means listen to 1186 * or stop listening to all of the Ethernet 1187 * multicast addresses used for IP. 1188 * (This is for the sake of IP multicast routers.) 1189 */ 1190 bcopy(ether_ipmulticast_min, addrlo, ETHER_ADDR_LEN); 1191 bcopy(ether_ipmulticast_max, addrhi, ETHER_ADDR_LEN); 1192 } 1193 else { 1194 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1195 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1196 } 1197 break; 1198 #endif 1199 #ifdef INET6 1200 case AF_INET6: 1201 sin6 = satosin6(sa); 1202 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1203 /* 1204 * An IP6 address of 0 means listen to or stop 1205 * listening to all of the Ethernet multicast 1206 * address used for IP6. 1207 * (This is used for multicast routers.) 1208 */ 1209 bcopy(ether_ip6multicast_min, addrlo, ETHER_ADDR_LEN); 1210 bcopy(ether_ip6multicast_max, addrhi, ETHER_ADDR_LEN); 1211 } else { 1212 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1213 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1214 } 1215 break; 1216 #endif 1217 1218 default: 1219 return (EAFNOSUPPORT); 1220 } 1221 return (0); 1222 } 1223 1224 /* 1225 * Add an Ethernet multicast address or range of addresses to the list for a 1226 * given interface. 1227 */ 1228 int 1229 ether_addmulti(struct ifreq *ifr, struct ethercom *ec) 1230 { 1231 struct ether_multi *enm; 1232 u_char addrlo[ETHER_ADDR_LEN]; 1233 u_char addrhi[ETHER_ADDR_LEN]; 1234 int s = splnet(), error; 1235 1236 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1237 if (error != 0) { 1238 splx(s); 1239 return (error); 1240 } 1241 1242 /* 1243 * Verify that we have valid Ethernet multicast addresses. 1244 */ 1245 if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) { 1246 splx(s); 1247 return (EINVAL); 1248 } 1249 /* 1250 * See if the address range is already in the list. 1251 */ 1252 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1253 if (enm != NULL) { 1254 /* 1255 * Found it; just increment the reference count. 1256 */ 1257 ++enm->enm_refcount; 1258 splx(s); 1259 return (0); 1260 } 1261 /* 1262 * New address or range; malloc a new multicast record 1263 * and link it into the interface's multicast list. 1264 */ 1265 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1266 if (enm == NULL) { 1267 splx(s); 1268 return (ENOBUFS); 1269 } 1270 bcopy(addrlo, enm->enm_addrlo, 6); 1271 bcopy(addrhi, enm->enm_addrhi, 6); 1272 enm->enm_ec = ec; 1273 enm->enm_refcount = 1; 1274 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1275 ec->ec_multicnt++; 1276 splx(s); 1277 /* 1278 * Return ENETRESET to inform the driver that the list has changed 1279 * and its reception filter should be adjusted accordingly. 1280 */ 1281 return (ENETRESET); 1282 } 1283 1284 /* 1285 * Delete a multicast address record. 1286 */ 1287 int 1288 ether_delmulti(struct ifreq *ifr, struct ethercom *ec) 1289 { 1290 struct ether_multi *enm; 1291 u_char addrlo[ETHER_ADDR_LEN]; 1292 u_char addrhi[ETHER_ADDR_LEN]; 1293 int s = splnet(), error; 1294 1295 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1296 if (error != 0) { 1297 splx(s); 1298 return (error); 1299 } 1300 1301 /* 1302 * Look ur the address in our list. 1303 */ 1304 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1305 if (enm == NULL) { 1306 splx(s); 1307 return (ENXIO); 1308 } 1309 if (--enm->enm_refcount != 0) { 1310 /* 1311 * Still some claims to this record. 1312 */ 1313 splx(s); 1314 return (0); 1315 } 1316 /* 1317 * No remaining claims to this record; unlink and free it. 1318 */ 1319 LIST_REMOVE(enm, enm_list); 1320 free(enm, M_IFMADDR); 1321 ec->ec_multicnt--; 1322 splx(s); 1323 /* 1324 * Return ENETRESET to inform the driver that the list has changed 1325 * and its reception filter should be adjusted accordingly. 1326 */ 1327 return (ENETRESET); 1328 } 1329 1330 /* 1331 * Common ioctls for Ethernet interfaces. Note, we must be 1332 * called at splnet(). 1333 */ 1334 int 1335 ether_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1336 { 1337 struct ethercom *ec = (void *) ifp; 1338 struct ifreq *ifr = (struct ifreq *)data; 1339 struct ifaddr *ifa = (struct ifaddr *)data; 1340 int error = 0; 1341 1342 switch (cmd) { 1343 case SIOCSIFADDR: 1344 ifp->if_flags |= IFF_UP; 1345 switch (ifa->ifa_addr->sa_family) { 1346 case AF_LINK: 1347 { 1348 struct sockaddr_dl *sdl = 1349 (struct sockaddr_dl *) ifa->ifa_addr; 1350 1351 if (sdl->sdl_type != IFT_ETHER || 1352 sdl->sdl_alen != ifp->if_addrlen) { 1353 error = EINVAL; 1354 break; 1355 } 1356 1357 memcpy(LLADDR(ifp->if_sadl), LLADDR(sdl), 1358 ifp->if_addrlen); 1359 1360 /* Set new address. */ 1361 error = (*ifp->if_init)(ifp); 1362 break; 1363 } 1364 #ifdef INET 1365 case AF_INET: 1366 if ((ifp->if_flags & IFF_RUNNING) == 0 && 1367 (error = (*ifp->if_init)(ifp)) != 0) 1368 break; 1369 arp_ifinit(ifp, ifa); 1370 break; 1371 #endif /* INET */ 1372 #ifdef NS 1373 case AF_NS: 1374 { 1375 struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; 1376 1377 if (ns_nullhost(*ina)) 1378 ina->x_host = *(union ns_host *) 1379 LLADDR(ifp->if_sadl); 1380 else 1381 memcpy(LLADDR(ifp->if_sadl), 1382 ina->x_host.c_host, ifp->if_addrlen); 1383 /* Set new address. */ 1384 error = (*ifp->if_init)(ifp); 1385 break; 1386 } 1387 #endif /* NS */ 1388 default: 1389 if ((ifp->if_flags & IFF_RUNNING) == 0) 1390 error = (*ifp->if_init)(ifp); 1391 break; 1392 } 1393 break; 1394 1395 case SIOCGIFADDR: 1396 memcpy(((struct sockaddr *)&ifr->ifr_data)->sa_data, 1397 LLADDR(ifp->if_sadl), ETHER_ADDR_LEN); 1398 break; 1399 1400 case SIOCSIFMTU: 1401 { 1402 int maxmtu; 1403 1404 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1405 maxmtu = ETHERMTU_JUMBO; 1406 else 1407 maxmtu = ETHERMTU; 1408 1409 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1410 error = EINVAL; 1411 else 1412 ifp->if_mtu = ifr->ifr_mtu; 1413 break; 1414 } 1415 1416 case SIOCSIFFLAGS: 1417 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_RUNNING) { 1418 /* 1419 * If interface is marked down and it is running, 1420 * then stop and disable it. 1421 */ 1422 (*ifp->if_stop)(ifp, 1); 1423 } else if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_UP) { 1424 /* 1425 * If interface is marked up and it is stopped, then 1426 * start it. 1427 */ 1428 error = (*ifp->if_init)(ifp); 1429 } else if ((ifp->if_flags & IFF_UP) != 0) { 1430 /* 1431 * Reset the interface to pick up changes in any other 1432 * flags that affect the hardware state. 1433 */ 1434 error = (*ifp->if_init)(ifp); 1435 } 1436 break; 1437 1438 case SIOCADDMULTI: 1439 error = ether_addmulti(ifr, ec); 1440 break; 1441 1442 case SIOCDELMULTI: 1443 error = ether_delmulti(ifr, ec); 1444 break; 1445 1446 default: 1447 error = ENOTTY; 1448 } 1449 1450 return (error); 1451 } 1452
Indexes created Tue Sep 23 02:09:52 GMT 2025