if_ethersubr.c revision 1.81
1 /* $NetBSD: if_ethersubr.c,v 1.81 2001/04/29 09:50:37 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 "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 ifp->if_lastchange = time; 207 if ((rt = rt0) != NULL) { 208 if ((rt->rt_flags & RTF_UP) == 0) { 209 if ((rt0 = rt = rtalloc1(dst, 1)) != NULL) { 210 rt->rt_refcnt--; 211 if (rt->rt_ifp != ifp) 212 return (*rt->rt_ifp->if_output) 213 (ifp, m0, dst, rt); 214 } else 215 senderr(EHOSTUNREACH); 216 } 217 if ((rt->rt_flags & RTF_GATEWAY) && dst->sa_family != AF_NS) { 218 if (rt->rt_gwroute == 0) 219 goto lookup; 220 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 221 rtfree(rt); rt = rt0; 222 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1); 223 if ((rt = rt->rt_gwroute) == 0) 224 senderr(EHOSTUNREACH); 225 /* the "G" test below also prevents rt == rt0 */ 226 if ((rt->rt_flags & RTF_GATEWAY) || 227 (rt->rt_ifp != ifp)) { 228 rt->rt_refcnt--; 229 rt0->rt_gwroute = 0; 230 senderr(EHOSTUNREACH); 231 } 232 } 233 } 234 if (rt->rt_flags & RTF_REJECT) 235 if (rt->rt_rmx.rmx_expire == 0 || 236 time.tv_sec < rt->rt_rmx.rmx_expire) 237 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 238 } 239 240 switch (dst->sa_family) { 241 242 #ifdef INET 243 case AF_INET: 244 if (m->m_flags & M_BCAST) 245 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 246 sizeof(edst)); 247 248 else if (m->m_flags & M_MCAST) { 249 ETHER_MAP_IP_MULTICAST(&SIN(dst)->sin_addr, 250 (caddr_t)edst) 251 252 } else if (!arpresolve(ifp, rt, m, dst, edst)) 253 return (0); /* if not yet resolved */ 254 /* If broadcasting on a simplex interface, loopback a copy */ 255 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 256 mcopy = m_copy(m, 0, (int)M_COPYALL); 257 etype = htons(ETHERTYPE_IP); 258 break; 259 260 case AF_ARP: 261 ah = mtod(m, struct arphdr *); 262 if (m->m_flags & M_BCAST) 263 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst, 264 sizeof(edst)); 265 else 266 bcopy((caddr_t)ar_tha(ah), 267 (caddr_t)edst, sizeof(edst)); 268 269 ah->ar_hrd = htons(ARPHRD_ETHER); 270 271 switch(ntohs(ah->ar_op)) { 272 case ARPOP_REVREQUEST: 273 case ARPOP_REVREPLY: 274 etype = htons(ETHERTYPE_REVARP); 275 break; 276 277 case ARPOP_REQUEST: 278 case ARPOP_REPLY: 279 default: 280 etype = htons(ETHERTYPE_ARP); 281 } 282 283 break; 284 #endif 285 #ifdef INET6 286 case AF_INET6: 287 #ifdef OLDIP6OUTPUT 288 if (!nd6_resolve(ifp, rt, m, dst, (u_char *)edst)) 289 return(0); /* if not yet resolves */ 290 #else 291 if (!nd6_storelladdr(ifp, rt, m, dst, (u_char *)edst)){ 292 /* something bad happened */ 293 return(0); 294 } 295 #endif /* OLDIP6OUTPUT */ 296 etype = htons(ETHERTYPE_IPV6); 297 break; 298 #endif 299 #ifdef NETATALK 300 case AF_APPLETALK: 301 if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) { 302 #ifdef NETATALKDEBUG 303 printf("aarpresolv failed\n"); 304 #endif /* NETATALKDEBUG */ 305 return (0); 306 } 307 /* 308 * ifaddr is the first thing in at_ifaddr 309 */ 310 aa = (struct at_ifaddr *) at_ifawithnet( 311 (struct sockaddr_at *)dst, ifp); 312 if (aa == NULL) 313 goto bad; 314 315 /* 316 * In the phase 2 case, we need to prepend an mbuf for the 317 * llc header. Since we must preserve the value of m, 318 * which is passed to us by value, we m_copy() the first 319 * mbuf, and use it for our llc header. 320 */ 321 if (aa->aa_flags & AFA_PHASE2) { 322 struct llc llc; 323 324 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 325 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 326 llc.llc_control = LLC_UI; 327 bcopy(at_org_code, llc.llc_snap_org_code, 328 sizeof(llc.llc_snap_org_code)); 329 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 330 bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc)); 331 } else { 332 etype = htons(ETHERTYPE_ATALK); 333 } 334 break; 335 #endif /* NETATALK */ 336 #ifdef NS 337 case AF_NS: 338 etype = htons(ETHERTYPE_NS); 339 bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host), 340 (caddr_t)edst, sizeof (edst)); 341 if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst))) 342 return (looutput(ifp, m, dst, rt)); 343 /* If broadcasting on a simplex interface, loopback a copy */ 344 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 345 mcopy = m_copy(m, 0, (int)M_COPYALL); 346 break; 347 #endif 348 #ifdef IPX 349 case AF_IPX: 350 etype = htons(ETHERTYPE_IPX); 351 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 352 (caddr_t)edst, sizeof (edst)); 353 /* If broadcasting on a simplex interface, loopback a copy */ 354 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 355 mcopy = m_copy(m, 0, (int)M_COPYALL); 356 break; 357 #endif 358 #ifdef ISO 359 case AF_ISO: { 360 int snpalen; 361 struct llc *l; 362 struct sockaddr_dl *sdl; 363 364 if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) && 365 sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) { 366 bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst)); 367 } else { 368 error = iso_snparesolve(ifp, (struct sockaddr_iso *)dst, 369 (char *)edst, &snpalen); 370 if (error) 371 goto bad; /* Not Resolved */ 372 } 373 /* If broadcasting on a simplex interface, loopback a copy */ 374 if (*edst & 1) 375 m->m_flags |= (M_BCAST|M_MCAST); 376 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) && 377 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 378 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 379 if (mcopy) { 380 eh = mtod(mcopy, struct ether_header *); 381 bcopy((caddr_t)edst, 382 (caddr_t)eh->ether_dhost, sizeof (edst)); 383 bcopy(LLADDR(ifp->if_sadl), 384 (caddr_t)eh->ether_shost, sizeof (edst)); 385 } 386 } 387 M_PREPEND(m, 3, M_DONTWAIT); 388 if (m == NULL) 389 return (0); 390 l = mtod(m, struct llc *); 391 l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP; 392 l->llc_control = LLC_UI; 393 #ifdef ARGO_DEBUG 394 if (argo_debug[D_ETHER]) { 395 int i; 396 printf("unoutput: sending pkt to: "); 397 for (i=0; i<6; i++) 398 printf("%x ", edst[i] & 0xff); 399 printf("\n"); 400 } 401 #endif 402 } break; 403 #endif /* ISO */ 404 #ifdef LLC 405 /* case AF_NSAP: */ 406 case AF_CCITT: { 407 struct sockaddr_dl *sdl = 408 (struct sockaddr_dl *) rt -> rt_gateway; 409 410 if (sdl && sdl->sdl_family == AF_LINK 411 && sdl->sdl_alen > 0) { 412 bcopy(LLADDR(sdl), (char *)edst, 413 sizeof(edst)); 414 } else goto bad; /* Not a link interface ? Funny ... */ 415 if ((ifp->if_flags & IFF_SIMPLEX) && (*edst & 1) && 416 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 417 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 418 if (mcopy) { 419 eh = mtod(mcopy, struct ether_header *); 420 bcopy((caddr_t)edst, 421 (caddr_t)eh->ether_dhost, sizeof (edst)); 422 bcopy(LLADDR(ifp->if_sadl), 423 (caddr_t)eh->ether_shost, sizeof (edst)); 424 } 425 } 426 #ifdef LLC_DEBUG 427 { 428 int i; 429 struct llc *l = mtod(m, struct llc *); 430 431 printf("ether_output: sending LLC2 pkt to: "); 432 for (i=0; i<6; i++) 433 printf("%x ", edst[i] & 0xff); 434 printf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n", 435 m->m_pkthdr.len, l->llc_dsap & 0xff, l->llc_ssap &0xff, 436 l->llc_control & 0xff); 437 438 } 439 #endif /* LLC_DEBUG */ 440 } break; 441 #endif /* LLC */ 442 443 case pseudo_AF_HDRCMPLT: 444 hdrcmplt = 1; 445 eh = (struct ether_header *)dst->sa_data; 446 bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, sizeof (esrc)); 447 /* FALLTHROUGH */ 448 449 case AF_UNSPEC: 450 eh = (struct ether_header *)dst->sa_data; 451 bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, sizeof (edst)); 452 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 453 etype = eh->ether_type; 454 break; 455 456 default: 457 printf("%s: can't handle af%d\n", ifp->if_xname, 458 dst->sa_family); 459 senderr(EAFNOSUPPORT); 460 } 461 462 if (mcopy) 463 (void) looutput(ifp, mcopy, dst, rt); 464 465 /* If no ether type is set, this must be a 802.2 formatted packet. 466 */ 467 if (etype == 0) 468 etype = htons(m->m_pkthdr.len); 469 /* 470 * Add local net header. If no space in first mbuf, 471 * allocate another. 472 */ 473 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 474 if (m == 0) 475 senderr(ENOBUFS); 476 eh = mtod(m, struct ether_header *); 477 bcopy((caddr_t)&etype,(caddr_t)&eh->ether_type, 478 sizeof(eh->ether_type)); 479 bcopy((caddr_t)edst, (caddr_t)eh->ether_dhost, sizeof (edst)); 480 if (hdrcmplt) 481 bcopy((caddr_t)esrc, (caddr_t)eh->ether_shost, 482 sizeof(eh->ether_shost)); 483 else 484 bcopy(LLADDR(ifp->if_sadl), (caddr_t)eh->ether_shost, 485 sizeof(eh->ether_shost)); 486 487 #ifdef PFIL_HOOKS 488 if ((error = pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 489 return (error); 490 if (m == NULL) 491 return (0); 492 #endif 493 494 #if NBRIDGE > 0 495 /* 496 * Bridges require special output handling. 497 */ 498 if (ifp->if_bridge) 499 return (bridge_output(ifp, m, NULL, NULL)); 500 #endif 501 502 #ifdef ALTQ 503 /* 504 * If ALTQ is enabled on the parent interface, do 505 * classification; the queueing discipline might not 506 * require classification, but might require the 507 * address family/header pointer in the pktattr. 508 */ 509 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 510 altq_etherclassify(&ifp->if_snd, m, &pktattr); 511 #endif 512 513 mflags = m->m_flags; 514 len = m->m_pkthdr.len; 515 s = splnet(); 516 /* 517 * Queue message on interface, and start output if interface 518 * not yet active. 519 */ 520 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, error); 521 if (error) { 522 /* mbuf is already freed */ 523 splx(s); 524 return (error); 525 } 526 ifp->if_obytes += len; 527 if (mflags & M_MCAST) 528 ifp->if_omcasts++; 529 if ((ifp->if_flags & IFF_OACTIVE) == 0) 530 (*ifp->if_start)(ifp); 531 splx(s); 532 return (error); 533 534 bad: 535 if (m) 536 m_freem(m); 537 return (error); 538 } 539 540 #ifdef ALTQ 541 /* 542 * This routine is a slight hack to allow a packet to be classified 543 * if the Ethernet headers are present. It will go away when ALTQ's 544 * classification engine understands link headers. 545 */ 546 void 547 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m, 548 struct altq_pktattr *pktattr) 549 { 550 struct ether_header *eh; 551 u_int16_t ether_type; 552 int hlen, af, hdrsize; 553 caddr_t hdr; 554 555 hlen = ETHER_HDR_LEN; 556 eh = mtod(m, struct ether_header *); 557 558 ether_type = htons(eh->ether_type); 559 560 if (ether_type < ETHERMTU) { 561 /* LLC/SNAP */ 562 struct llc *llc = (struct llc *)(eh + 1); 563 hlen += 8; 564 565 if (m->m_len < hlen || 566 llc->llc_dsap != LLC_SNAP_LSAP || 567 llc->llc_ssap != LLC_SNAP_LSAP || 568 llc->llc_control != LLC_UI) { 569 /* Not SNAP. */ 570 goto bad; 571 } 572 573 ether_type = htons(llc->llc_un.type_snap.ether_type); 574 } 575 576 switch (ether_type) { 577 case ETHERTYPE_IP: 578 af = AF_INET; 579 hdrsize = 20; /* sizeof(struct ip) */ 580 break; 581 582 case ETHERTYPE_IPV6: 583 af = AF_INET6; 584 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 585 break; 586 587 default: 588 af = AF_UNSPEC; 589 hdrsize = 0; 590 break; 591 } 592 593 if (m->m_len < (hlen + hdrsize)) { 594 /* 595 * Ethernet and protocol header not in a single 596 * mbuf. We can't cope with this situation right 597 * now (but it shouldn't ever happen, really, anyhow). 598 * XXX Should use m_pulldown(). 599 */ 600 printf("altq_etherclassify: headers span multiple mbufs: " 601 "%d < %d\n", m->m_len, (hlen + hdrsize)); 602 goto bad; 603 } 604 605 m->m_data += hlen; 606 m->m_len -= hlen; 607 608 hdr = mtod(m, caddr_t); 609 610 if (ALTQ_NEEDS_CLASSIFY(ifq)) 611 pktattr->pattr_class = 612 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 613 pktattr->pattr_af = af; 614 pktattr->pattr_hdr = hdr; 615 616 m->m_data -= hlen; 617 m->m_len += hlen; 618 619 return; 620 621 bad: 622 pktattr->pattr_class = NULL; 623 pktattr->pattr_hdr = NULL; 624 pktattr->pattr_af = AF_UNSPEC; 625 } 626 #endif /* ALTQ */ 627 628 /* 629 * Process a received Ethernet packet; 630 * the packet is in the mbuf chain m with 631 * the ether header. 632 */ 633 static void 634 ether_input(struct ifnet *ifp, struct mbuf *m) 635 { 636 struct ifqueue *inq; 637 u_int16_t etype; 638 int s; 639 struct ether_header *eh; 640 struct mbuf *n; 641 #if defined (ISO) || defined (LLC) || defined(NETATALK) 642 struct llc *l; 643 #endif 644 645 if ((ifp->if_flags & IFF_UP) == 0) { 646 m_freem(m); 647 return; 648 } 649 650 eh = mtod(m, struct ether_header *); 651 etype = ntohs(eh->ether_type); 652 653 /* 654 * Determine if the packet is within its size limits. 655 */ 656 if (m->m_pkthdr.len > ETHER_MAX_FRAME(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 the CRC is still on the packet, trim it off. */ 664 if (m->m_flags & M_HASFCS) { 665 m_adj(m, -ETHER_CRC_LEN); 666 m->m_flags &= ~M_HASFCS; 667 } 668 669 ifp->if_lastchange = time; 670 ifp->if_ibytes += m->m_pkthdr.len; 671 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 672 if (memcmp(etherbroadcastaddr, 673 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 674 m->m_flags |= M_BCAST; 675 else 676 m->m_flags |= M_MCAST; 677 ifp->if_imcasts++; 678 } 679 680 #if NBRIDGE > 0 681 /* 682 * Tap the packet off here for a bridge. bridge_input() 683 * will return NULL if it has consumed the packet, otherwise 684 * it gets processed as normal. Note that bridge_input() 685 * will always return the original packet if we need to 686 * process it locally. 687 */ 688 if (ifp->if_bridge) { 689 m = bridge_input(ifp, m); 690 if (m == NULL) 691 return; 692 693 /* 694 * Bridge has determined that the packet is for us. 695 * Update our interface pointer -- we may have had 696 * to "bridge" the packet locally. 697 */ 698 ifp = m->m_pkthdr.rcvif; 699 } 700 #endif /* NBRIDGE > 0 */ 701 702 /* 703 * XXX This comparison is redundant if we are a bridge 704 * XXX and processing the packet locally. 705 */ 706 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0 && 707 (ifp->if_flags & IFF_PROMISC) != 0 && 708 memcmp(LLADDR(ifp->if_sadl), eh->ether_dhost, 709 ETHER_ADDR_LEN) != 0) { 710 m_freem(m); 711 return; 712 } 713 714 #ifdef PFIL_HOOKS 715 if (pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 716 return; 717 if (m == NULL) 718 return; 719 720 eh = mtod(m, struct ether_header *); 721 etype = ntohs(eh->ether_type); 722 #endif 723 724 /* Check if the mbuf has a VLAN tag */ 725 n = m_aux_find(m, AF_LINK, ETHERTYPE_VLAN); 726 if (n) { 727 #if NVLAN > 0 728 /* 729 * vlan_input() will either recursively call ether_input() 730 * or drop the packet. 731 */ 732 if (((struct ethercom *)ifp)->ec_nvlans != 0) 733 vlan_input(ifp, m); 734 else 735 #endif 736 m_freem(m); 737 return; 738 } 739 740 /* 741 * Handle protocols that expect to have the Ethernet header 742 * (and possibly FCS) intact. 743 */ 744 switch (etype) { 745 #if NVLAN > 0 746 case ETHERTYPE_VLAN: 747 /* 748 * vlan_input() will either recursively call ether_input() 749 * or drop the packet. 750 */ 751 if (((struct ethercom *)ifp)->ec_nvlans != 0) 752 vlan_input(ifp, m); 753 else 754 m_freem(m); 755 return; 756 #endif /* NVLAN > 0 */ 757 #if NPPPOE > 0 758 case ETHERTYPE_PPPOEDISC: 759 case ETHERTYPE_PPPOE: 760 if (etype == ETHERTYPE_PPPOEDISC) 761 inq = &ppoediscinq; 762 else 763 inq = &ppoeinq; 764 s = splnet(); 765 if (IF_QFULL(inq)) { 766 IF_DROP(inq); 767 m_freem(m); 768 } else 769 IF_ENQUEUE(inq, m); 770 splx(s); 771 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 772 if (!callout_active(&pppoe_softintr)) 773 callout_reset(&pppoe_softintr, 1, pppoe_softintr_handler, NULL); 774 #else 775 softintr_schedule(pppoe_softintr); 776 #endif 777 return; 778 #endif /* NPPPOE > 0 */ 779 default: 780 ; /* Nothing. */ 781 } 782 783 /* Strip off the Ethernet header. */ 784 m_adj(m, sizeof(struct ether_header)); 785 786 /* If the CRC is still on the packet, trim it off. */ 787 if (m->m_flags & M_HASFCS) { 788 m_adj(m, -ETHER_CRC_LEN); 789 m->m_flags &= ~M_HASFCS; 790 } 791 792 switch (etype) { 793 #ifdef INET 794 case ETHERTYPE_IP: 795 #ifdef GATEWAY 796 if (ipflow_fastforward(m)) 797 return; 798 #endif 799 schednetisr(NETISR_IP); 800 inq = &ipintrq; 801 break; 802 803 case ETHERTYPE_ARP: 804 schednetisr(NETISR_ARP); 805 inq = &arpintrq; 806 break; 807 808 case ETHERTYPE_REVARP: 809 revarpinput(m); /* XXX queue? */ 810 return; 811 #endif 812 #ifdef INET6 813 case ETHERTYPE_IPV6: 814 schednetisr(NETISR_IPV6); 815 inq = &ip6intrq; 816 break; 817 #endif 818 #ifdef NS 819 case ETHERTYPE_NS: 820 schednetisr(NETISR_NS); 821 inq = &nsintrq; 822 break; 823 824 #endif 825 #ifdef IPX 826 case ETHERTYPE_IPX: 827 schednetisr(NETISR_IPX); 828 inq = &ipxintrq; 829 break; 830 #endif 831 #ifdef NETATALK 832 case ETHERTYPE_ATALK: 833 schednetisr(NETISR_ATALK); 834 inq = &atintrq1; 835 break; 836 case ETHERTYPE_AARP: 837 /* probably this should be done with a NETISR as well */ 838 aarpinput(ifp, m); /* XXX */ 839 return; 840 #endif /* NETATALK */ 841 default: 842 #if defined (ISO) || defined (LLC) || defined (NETATALK) 843 if (etype > ETHERMTU) 844 goto dropanyway; 845 l = mtod(m, struct llc *); 846 switch (l->llc_dsap) { 847 #ifdef NETATALK 848 case LLC_SNAP_LSAP: 849 switch (l->llc_control) { 850 case LLC_UI: 851 if (l->llc_ssap != LLC_SNAP_LSAP) { 852 goto dropanyway; 853 } 854 855 if (Bcmp(&(l->llc_snap_org_code)[0], 856 at_org_code, sizeof(at_org_code)) == 0 && 857 ntohs(l->llc_snap_ether_type) == 858 ETHERTYPE_ATALK) { 859 inq = &atintrq2; 860 m_adj(m, sizeof(struct llc)); 861 schednetisr(NETISR_ATALK); 862 break; 863 } 864 865 if (Bcmp(&(l->llc_snap_org_code)[0], 866 aarp_org_code, 867 sizeof(aarp_org_code)) == 0 && 868 ntohs(l->llc_snap_ether_type) == 869 ETHERTYPE_AARP) { 870 m_adj( m, sizeof(struct llc)); 871 aarpinput(ifp, m); /* XXX */ 872 return; 873 } 874 875 default: 876 goto dropanyway; 877 } 878 break; 879 #endif /* NETATALK */ 880 #ifdef ISO 881 case LLC_ISO_LSAP: 882 switch (l->llc_control) { 883 case LLC_UI: 884 /* LLC_UI_P forbidden in class 1 service */ 885 if ((l->llc_dsap == LLC_ISO_LSAP) && 886 (l->llc_ssap == LLC_ISO_LSAP)) { 887 /* LSAP for ISO */ 888 if (m->m_pkthdr.len > etype) 889 m_adj(m, etype - m->m_pkthdr.len); 890 m->m_data += 3; /* XXX */ 891 m->m_len -= 3; /* XXX */ 892 m->m_pkthdr.len -= 3; /* XXX */ 893 M_PREPEND(m, sizeof *eh, M_DONTWAIT); 894 if (m == 0) 895 return; 896 *mtod(m, struct ether_header *) = *eh; 897 #ifdef ARGO_DEBUG 898 if (argo_debug[D_ETHER]) 899 printf("clnp packet"); 900 #endif 901 schednetisr(NETISR_ISO); 902 inq = &clnlintrq; 903 break; 904 } 905 goto dropanyway; 906 907 case LLC_XID: 908 case LLC_XID_P: 909 if(m->m_len < 6) 910 goto dropanyway; 911 l->llc_window = 0; 912 l->llc_fid = 9; 913 l->llc_class = 1; 914 l->llc_dsap = l->llc_ssap = 0; 915 /* Fall through to */ 916 case LLC_TEST: 917 case LLC_TEST_P: 918 { 919 struct sockaddr sa; 920 struct ether_header *eh2; 921 int i; 922 u_char c = l->llc_dsap; 923 924 l->llc_dsap = l->llc_ssap; 925 l->llc_ssap = c; 926 if (m->m_flags & (M_BCAST | M_MCAST)) 927 bcopy(LLADDR(ifp->if_sadl), 928 (caddr_t)eh->ether_dhost, 6); 929 sa.sa_family = AF_UNSPEC; 930 sa.sa_len = sizeof(sa); 931 eh2 = (struct ether_header *)sa.sa_data; 932 for (i = 0; i < 6; i++) { 933 eh2->ether_shost[i] = c = 934 eh->ether_dhost[i]; 935 eh2->ether_dhost[i] = 936 eh->ether_dhost[i] = 937 eh->ether_shost[i]; 938 eh->ether_shost[i] = c; 939 } 940 ifp->if_output(ifp, m, &sa, NULL); 941 return; 942 } 943 default: 944 m_freem(m); 945 return; 946 } 947 break; 948 #endif /* ISO */ 949 #ifdef LLC 950 case LLC_X25_LSAP: 951 { 952 if (m->m_pkthdr.len > etype) 953 m_adj(m, etype - m->m_pkthdr.len); 954 M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT); 955 if (m == 0) 956 return; 957 if ( !sdl_sethdrif(ifp, eh->ether_shost, LLC_X25_LSAP, 958 eh->ether_dhost, LLC_X25_LSAP, 6, 959 mtod(m, struct sdl_hdr *))) 960 panic("ETHER cons addr failure"); 961 mtod(m, struct sdl_hdr *)->sdlhdr_len = etype; 962 #ifdef LLC_DEBUG 963 printf("llc packet\n"); 964 #endif /* LLC_DEBUG */ 965 schednetisr(NETISR_CCITT); 966 inq = &llcintrq; 967 break; 968 } 969 #endif /* LLC */ 970 dropanyway: 971 default: 972 m_freem(m); 973 return; 974 } 975 #else /* ISO || LLC || NETATALK*/ 976 m_freem(m); 977 return; 978 #endif /* ISO || LLC || NETATALK*/ 979 } 980 981 s = splnet(); 982 if (IF_QFULL(inq)) { 983 IF_DROP(inq); 984 m_freem(m); 985 } else 986 IF_ENQUEUE(inq, m); 987 splx(s); 988 } 989 990 /* 991 * Convert Ethernet address to printable (loggable) representation. 992 */ 993 static char digits[] = "0123456789abcdef"; 994 char * 995 ether_sprintf(const u_char *ap) 996 { 997 static char etherbuf[18]; 998 char *cp = etherbuf; 999 int i; 1000 1001 for (i = 0; i < 6; i++) { 1002 *cp++ = digits[*ap >> 4]; 1003 *cp++ = digits[*ap++ & 0xf]; 1004 *cp++ = ':'; 1005 } 1006 *--cp = 0; 1007 return (etherbuf); 1008 } 1009 1010 /* 1011 * Perform common duties while attaching to interface list 1012 */ 1013 void 1014 ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 1015 { 1016 1017 ifp->if_type = IFT_ETHER; 1018 ifp->if_addrlen = ETHER_ADDR_LEN; 1019 ifp->if_hdrlen = 14; 1020 ifp->if_dlt = DLT_EN10MB; 1021 ifp->if_mtu = ETHERMTU; 1022 ifp->if_output = ether_output; 1023 ifp->if_input = ether_input; 1024 if (ifp->if_baudrate == 0) 1025 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 1026 1027 if_alloc_sadl(ifp); 1028 memcpy(LLADDR(ifp->if_sadl), lla, ifp->if_addrlen); 1029 1030 LIST_INIT(&((struct ethercom *)ifp)->ec_multiaddrs); 1031 ifp->if_broadcastaddr = etherbroadcastaddr; 1032 #if NBPFILTER > 0 1033 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 1034 #endif 1035 } 1036 1037 void 1038 ether_ifdetach(struct ifnet *ifp) 1039 { 1040 struct ethercom *ec = (void *) ifp; 1041 struct ether_multi *enm; 1042 int s; 1043 1044 #if NBPFILTER > 0 1045 bpfdetach(ifp); 1046 #endif 1047 1048 #if NVLAN > 0 1049 if (ec->ec_nvlans) 1050 vlan_ifdetach(ifp); 1051 #endif 1052 1053 s = splnet(); 1054 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1055 LIST_REMOVE(enm, enm_list); 1056 free(enm, M_IFADDR); 1057 ec->ec_multicnt--; 1058 } 1059 splx(s); 1060 1061 if_free_sadl(ifp); 1062 } 1063 1064 #if 0 1065 /* 1066 * This is for reference. We have a table-driven version 1067 * of the little-endian crc32 generator, which is faster 1068 * than the double-loop. 1069 */ 1070 u_int32_t 1071 ether_crc32_le(const u_int8_t *buf, size_t len) 1072 { 1073 u_int32_t c, crc, carry; 1074 size_t i, j; 1075 1076 crc = 0xffffffffU; /* initial value */ 1077 1078 for (i = 0; i < len; i++) { 1079 c = buf[i]; 1080 for (j = 0; j < 8; j++) { 1081 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1082 crc >>= 1; 1083 c >>= 1; 1084 if (carry) 1085 crc = (crc ^ ETHER_CRC_POLY_LE); 1086 } 1087 } 1088 1089 return (crc); 1090 } 1091 #else 1092 u_int32_t 1093 ether_crc32_le(const u_int8_t *buf, size_t len) 1094 { 1095 static const u_int32_t crctab[] = { 1096 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1097 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1098 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1099 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1100 }; 1101 u_int32_t crc; 1102 int i; 1103 1104 crc = 0xffffffffU; /* initial value */ 1105 1106 for (i = 0; i < len; i++) { 1107 crc ^= buf[i]; 1108 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1109 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1110 } 1111 1112 return (crc); 1113 } 1114 #endif 1115 1116 u_int32_t 1117 ether_crc32_be(const u_int8_t *buf, size_t len) 1118 { 1119 u_int32_t c, crc, carry; 1120 size_t i, j; 1121 1122 crc = 0xffffffffU; /* initial value */ 1123 1124 for (i = 0; i < len; i++) { 1125 c = buf[i]; 1126 for (j = 0; j < 8; j++) { 1127 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1128 crc <<= 1; 1129 c >>= 1; 1130 if (carry) 1131 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1132 } 1133 } 1134 1135 return (crc); 1136 } 1137 1138 #ifdef INET 1139 u_char ether_ipmulticast_min[6] = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1140 u_char ether_ipmulticast_max[6] = { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1141 #endif 1142 #ifdef INET6 1143 u_char ether_ip6multicast_min[6] = { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1144 u_char ether_ip6multicast_max[6] = { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1145 #endif 1146 1147 /* 1148 * Convert a sockaddr into an Ethernet address or range of Ethernet 1149 * addresses. 1150 */ 1151 int 1152 ether_multiaddr(struct sockaddr *sa, u_int8_t addrlo[ETHER_ADDR_LEN], 1153 u_int8_t addrhi[ETHER_ADDR_LEN]) 1154 { 1155 #ifdef INET 1156 struct sockaddr_in *sin; 1157 #endif /* INET */ 1158 #ifdef INET6 1159 struct sockaddr_in6 *sin6; 1160 #endif /* INET6 */ 1161 1162 switch (sa->sa_family) { 1163 1164 case AF_UNSPEC: 1165 bcopy(sa->sa_data, addrlo, ETHER_ADDR_LEN); 1166 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1167 break; 1168 1169 #ifdef INET 1170 case AF_INET: 1171 sin = satosin(sa); 1172 if (sin->sin_addr.s_addr == INADDR_ANY) { 1173 /* 1174 * An IP address of INADDR_ANY means listen to 1175 * or stop listening to all of the Ethernet 1176 * multicast addresses used for IP. 1177 * (This is for the sake of IP multicast routers.) 1178 */ 1179 bcopy(ether_ipmulticast_min, addrlo, ETHER_ADDR_LEN); 1180 bcopy(ether_ipmulticast_max, addrhi, ETHER_ADDR_LEN); 1181 } 1182 else { 1183 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1184 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1185 } 1186 break; 1187 #endif 1188 #ifdef INET6 1189 case AF_INET6: 1190 sin6 = satosin6(sa); 1191 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1192 /* 1193 * An IP6 address of 0 means listen to or stop 1194 * listening to all of the Ethernet multicast 1195 * address used for IP6. 1196 * (This is used for multicast routers.) 1197 */ 1198 bcopy(ether_ip6multicast_min, addrlo, ETHER_ADDR_LEN); 1199 bcopy(ether_ip6multicast_max, addrhi, ETHER_ADDR_LEN); 1200 } else { 1201 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1202 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1203 } 1204 break; 1205 #endif 1206 1207 default: 1208 return (EAFNOSUPPORT); 1209 } 1210 return (0); 1211 } 1212 1213 /* 1214 * Add an Ethernet multicast address or range of addresses to the list for a 1215 * given interface. 1216 */ 1217 int 1218 ether_addmulti(struct ifreq *ifr, struct ethercom *ec) 1219 { 1220 struct ether_multi *enm; 1221 u_char addrlo[ETHER_ADDR_LEN]; 1222 u_char addrhi[ETHER_ADDR_LEN]; 1223 int s = splnet(), error; 1224 1225 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1226 if (error != 0) { 1227 splx(s); 1228 return (error); 1229 } 1230 1231 /* 1232 * Verify that we have valid Ethernet multicast addresses. 1233 */ 1234 if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) { 1235 splx(s); 1236 return (EINVAL); 1237 } 1238 /* 1239 * See if the address range is already in the list. 1240 */ 1241 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1242 if (enm != NULL) { 1243 /* 1244 * Found it; just increment the reference count. 1245 */ 1246 ++enm->enm_refcount; 1247 splx(s); 1248 return (0); 1249 } 1250 /* 1251 * New address or range; malloc a new multicast record 1252 * and link it into the interface's multicast list. 1253 */ 1254 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1255 if (enm == NULL) { 1256 splx(s); 1257 return (ENOBUFS); 1258 } 1259 bcopy(addrlo, enm->enm_addrlo, 6); 1260 bcopy(addrhi, enm->enm_addrhi, 6); 1261 enm->enm_ec = ec; 1262 enm->enm_refcount = 1; 1263 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1264 ec->ec_multicnt++; 1265 splx(s); 1266 /* 1267 * Return ENETRESET to inform the driver that the list has changed 1268 * and its reception filter should be adjusted accordingly. 1269 */ 1270 return (ENETRESET); 1271 } 1272 1273 /* 1274 * Delete a multicast address record. 1275 */ 1276 int 1277 ether_delmulti(struct ifreq *ifr, struct ethercom *ec) 1278 { 1279 struct ether_multi *enm; 1280 u_char addrlo[ETHER_ADDR_LEN]; 1281 u_char addrhi[ETHER_ADDR_LEN]; 1282 int s = splnet(), error; 1283 1284 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1285 if (error != 0) { 1286 splx(s); 1287 return (error); 1288 } 1289 1290 /* 1291 * Look ur the address in our list. 1292 */ 1293 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1294 if (enm == NULL) { 1295 splx(s); 1296 return (ENXIO); 1297 } 1298 if (--enm->enm_refcount != 0) { 1299 /* 1300 * Still some claims to this record. 1301 */ 1302 splx(s); 1303 return (0); 1304 } 1305 /* 1306 * No remaining claims to this record; unlink and free it. 1307 */ 1308 LIST_REMOVE(enm, enm_list); 1309 free(enm, M_IFMADDR); 1310 ec->ec_multicnt--; 1311 splx(s); 1312 /* 1313 * Return ENETRESET to inform the driver that the list has changed 1314 * and its reception filter should be adjusted accordingly. 1315 */ 1316 return (ENETRESET); 1317 } 1318 1319 /* 1320 * Common ioctls for Ethernet interfaces. Note, we must be 1321 * called at splnet(). 1322 */ 1323 int 1324 ether_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1325 { 1326 struct ethercom *ec = (void *) ifp; 1327 struct ifreq *ifr = (struct ifreq *)data; 1328 struct ifaddr *ifa = (struct ifaddr *)data; 1329 int error = 0; 1330 1331 switch (cmd) { 1332 case SIOCSIFADDR: 1333 ifp->if_flags |= IFF_UP; 1334 switch (ifa->ifa_addr->sa_family) { 1335 case AF_LINK: 1336 { 1337 struct sockaddr_dl *sdl = 1338 (struct sockaddr_dl *) ifa->ifa_addr; 1339 1340 if (sdl->sdl_type != IFT_ETHER || 1341 sdl->sdl_alen != ifp->if_addrlen) { 1342 error = EINVAL; 1343 break; 1344 } 1345 1346 memcpy(LLADDR(ifp->if_sadl), LLADDR(sdl), 1347 ifp->if_addrlen); 1348 1349 /* Set new address. */ 1350 error = (*ifp->if_init)(ifp); 1351 break; 1352 } 1353 #ifdef INET 1354 case AF_INET: 1355 if ((error = (*ifp->if_init)(ifp)) != 0) 1356 break; 1357 arp_ifinit(ifp, ifa); 1358 break; 1359 #endif /* INET */ 1360 #ifdef NS 1361 case AF_NS: 1362 { 1363 struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; 1364 1365 if (ns_nullhost(*ina)) 1366 ina->x_host = *(union ns_host *) 1367 LLADDR(ifp->if_sadl); 1368 else 1369 memcpy(LLADDR(ifp->if_sadl), 1370 ina->x_host.c_host, ifp->if_addrlen); 1371 /* Set new address. */ 1372 error = (*ifp->if_init)(ifp); 1373 break; 1374 } 1375 #endif /* NS */ 1376 default: 1377 error = (*ifp->if_init)(ifp); 1378 break; 1379 } 1380 break; 1381 1382 case SIOCGIFADDR: 1383 memcpy(((struct sockaddr *)&ifr->ifr_data)->sa_data, 1384 LLADDR(ifp->if_sadl), ETHER_ADDR_LEN); 1385 break; 1386 1387 case SIOCSIFMTU: 1388 if (ifr->ifr_mtu > ETHERMTU) 1389 error = EINVAL; 1390 else 1391 ifp->if_mtu = ifr->ifr_mtu; 1392 break; 1393 1394 case SIOCSIFFLAGS: 1395 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_RUNNING) { 1396 /* 1397 * If interface is marked down and it is running, 1398 * then stop and disable it. 1399 */ 1400 (*ifp->if_stop)(ifp, 1); 1401 } else if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_UP) { 1402 /* 1403 * If interface is marked up and it is stopped, then 1404 * start it. 1405 */ 1406 error = (*ifp->if_init)(ifp); 1407 } else if ((ifp->if_flags & IFF_UP) != 0) { 1408 /* 1409 * Reset the interface to pick up changes in any other 1410 * flags that affect the hardware state. 1411 */ 1412 error = (*ifp->if_init)(ifp); 1413 } 1414 break; 1415 1416 case SIOCADDMULTI: 1417 error = ether_addmulti(ifr, ec); 1418 break; 1419 1420 case SIOCDELMULTI: 1421 error = ether_delmulti(ifr, ec); 1422 break; 1423 1424 default: 1425 error = ENOTTY; 1426 } 1427 1428 return (error); 1429 } 1430
Indexes created Tue Sep 23 07:09:52 GMT 2025