if_ethersubr.c revision 1.89
1 /* $NetBSD: if_ethersubr.c,v 1.89 2001/10/17 08:23:05 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 "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 if (!nd6_storelladdr(ifp, rt, m, dst, (u_char *)edst)){ 287 /* something bad happened */ 288 return(0); 289 } 290 etype = htons(ETHERTYPE_IPV6); 291 break; 292 #endif 293 #ifdef NETATALK 294 case AF_APPLETALK: 295 if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) { 296 #ifdef NETATALKDEBUG 297 printf("aarpresolv failed\n"); 298 #endif /* NETATALKDEBUG */ 299 return (0); 300 } 301 /* 302 * ifaddr is the first thing in at_ifaddr 303 */ 304 aa = (struct at_ifaddr *) at_ifawithnet( 305 (struct sockaddr_at *)dst, ifp); 306 if (aa == NULL) 307 goto bad; 308 309 /* 310 * In the phase 2 case, we need to prepend an mbuf for the 311 * llc header. Since we must preserve the value of m, 312 * which is passed to us by value, we m_copy() the first 313 * mbuf, and use it for our llc header. 314 */ 315 if (aa->aa_flags & AFA_PHASE2) { 316 struct llc llc; 317 318 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 319 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 320 llc.llc_control = LLC_UI; 321 bcopy(at_org_code, llc.llc_snap_org_code, 322 sizeof(llc.llc_snap_org_code)); 323 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 324 bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc)); 325 } else { 326 etype = htons(ETHERTYPE_ATALK); 327 } 328 break; 329 #endif /* NETATALK */ 330 #ifdef NS 331 case AF_NS: 332 etype = htons(ETHERTYPE_NS); 333 bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host), 334 (caddr_t)edst, sizeof (edst)); 335 if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst))) 336 return (looutput(ifp, m, dst, rt)); 337 /* If broadcasting on a simplex interface, loopback a copy */ 338 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 339 mcopy = m_copy(m, 0, (int)M_COPYALL); 340 break; 341 #endif 342 #ifdef IPX 343 case AF_IPX: 344 etype = htons(ETHERTYPE_IPX); 345 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 346 (caddr_t)edst, sizeof (edst)); 347 /* If broadcasting on a simplex interface, loopback a copy */ 348 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 349 mcopy = m_copy(m, 0, (int)M_COPYALL); 350 break; 351 #endif 352 #ifdef ISO 353 case AF_ISO: { 354 int snpalen; 355 struct llc *l; 356 struct sockaddr_dl *sdl; 357 358 if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) && 359 sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) { 360 bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst)); 361 } else { 362 error = iso_snparesolve(ifp, (struct sockaddr_iso *)dst, 363 (char *)edst, &snpalen); 364 if (error) 365 goto bad; /* Not Resolved */ 366 } 367 /* If broadcasting on a simplex interface, loopback a copy */ 368 if (*edst & 1) 369 m->m_flags |= (M_BCAST|M_MCAST); 370 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) && 371 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 372 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 373 if (mcopy) { 374 eh = mtod(mcopy, struct ether_header *); 375 bcopy((caddr_t)edst, 376 (caddr_t)eh->ether_dhost, sizeof (edst)); 377 bcopy(LLADDR(ifp->if_sadl), 378 (caddr_t)eh->ether_shost, sizeof (edst)); 379 } 380 } 381 M_PREPEND(m, 3, M_DONTWAIT); 382 if (m == NULL) 383 return (0); 384 l = mtod(m, struct llc *); 385 l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP; 386 l->llc_control = LLC_UI; 387 #ifdef ARGO_DEBUG 388 if (argo_debug[D_ETHER]) { 389 int i; 390 printf("unoutput: sending pkt to: "); 391 for (i=0; i<6; i++) 392 printf("%x ", edst[i] & 0xff); 393 printf("\n"); 394 } 395 #endif 396 } break; 397 #endif /* ISO */ 398 #ifdef LLC 399 /* case AF_NSAP: */ 400 case AF_CCITT: { 401 struct sockaddr_dl *sdl = 402 (struct sockaddr_dl *) rt -> rt_gateway; 403 404 if (sdl && sdl->sdl_family == AF_LINK 405 && sdl->sdl_alen > 0) { 406 bcopy(LLADDR(sdl), (char *)edst, 407 sizeof(edst)); 408 } else goto bad; /* Not a link interface ? Funny ... */ 409 if ((ifp->if_flags & IFF_SIMPLEX) && (*edst & 1) && 410 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 411 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 412 if (mcopy) { 413 eh = mtod(mcopy, struct ether_header *); 414 bcopy((caddr_t)edst, 415 (caddr_t)eh->ether_dhost, sizeof (edst)); 416 bcopy(LLADDR(ifp->if_sadl), 417 (caddr_t)eh->ether_shost, sizeof (edst)); 418 } 419 } 420 #ifdef LLC_DEBUG 421 { 422 int i; 423 struct llc *l = mtod(m, struct llc *); 424 425 printf("ether_output: sending LLC2 pkt to: "); 426 for (i=0; i<6; i++) 427 printf("%x ", edst[i] & 0xff); 428 printf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n", 429 m->m_pkthdr.len, l->llc_dsap & 0xff, l->llc_ssap &0xff, 430 l->llc_control & 0xff); 431 432 } 433 #endif /* LLC_DEBUG */ 434 } break; 435 #endif /* LLC */ 436 437 case pseudo_AF_HDRCMPLT: 438 hdrcmplt = 1; 439 eh = (struct ether_header *)dst->sa_data; 440 bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, sizeof (esrc)); 441 /* FALLTHROUGH */ 442 443 case AF_UNSPEC: 444 eh = (struct ether_header *)dst->sa_data; 445 bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, sizeof (edst)); 446 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 447 etype = eh->ether_type; 448 break; 449 450 default: 451 printf("%s: can't handle af%d\n", ifp->if_xname, 452 dst->sa_family); 453 senderr(EAFNOSUPPORT); 454 } 455 456 if (mcopy) 457 (void) looutput(ifp, mcopy, dst, rt); 458 459 /* If no ether type is set, this must be a 802.2 formatted packet. 460 */ 461 if (etype == 0) 462 etype = htons(m->m_pkthdr.len); 463 /* 464 * Add local net header. If no space in first mbuf, 465 * allocate another. 466 */ 467 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 468 if (m == 0) 469 senderr(ENOBUFS); 470 eh = mtod(m, struct ether_header *); 471 bcopy((caddr_t)&etype,(caddr_t)&eh->ether_type, 472 sizeof(eh->ether_type)); 473 bcopy((caddr_t)edst, (caddr_t)eh->ether_dhost, sizeof (edst)); 474 if (hdrcmplt) 475 bcopy((caddr_t)esrc, (caddr_t)eh->ether_shost, 476 sizeof(eh->ether_shost)); 477 else 478 bcopy(LLADDR(ifp->if_sadl), (caddr_t)eh->ether_shost, 479 sizeof(eh->ether_shost)); 480 481 #ifdef PFIL_HOOKS 482 if ((error = pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 483 return (error); 484 if (m == NULL) 485 return (0); 486 #endif 487 488 #if NBRIDGE > 0 489 /* 490 * Bridges require special output handling. 491 */ 492 if (ifp->if_bridge) 493 return (bridge_output(ifp, m, NULL, NULL)); 494 #endif 495 496 #ifdef ALTQ 497 /* 498 * If ALTQ is enabled on the parent interface, do 499 * classification; the queueing discipline might not 500 * require classification, but might require the 501 * address family/header pointer in the pktattr. 502 */ 503 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 504 altq_etherclassify(&ifp->if_snd, m, &pktattr); 505 #endif 506 507 mflags = m->m_flags; 508 len = m->m_pkthdr.len; 509 s = splnet(); 510 /* 511 * Queue message on interface, and start output if interface 512 * not yet active. 513 */ 514 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, error); 515 if (error) { 516 /* mbuf is already freed */ 517 splx(s); 518 return (error); 519 } 520 ifp->if_obytes += len; 521 if (mflags & M_MCAST) 522 ifp->if_omcasts++; 523 if ((ifp->if_flags & IFF_OACTIVE) == 0) 524 (*ifp->if_start)(ifp); 525 splx(s); 526 return (error); 527 528 bad: 529 if (m) 530 m_freem(m); 531 return (error); 532 } 533 534 #ifdef ALTQ 535 /* 536 * This routine is a slight hack to allow a packet to be classified 537 * if the Ethernet headers are present. It will go away when ALTQ's 538 * classification engine understands link headers. 539 */ 540 void 541 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m, 542 struct altq_pktattr *pktattr) 543 { 544 struct ether_header *eh; 545 u_int16_t ether_type; 546 int hlen, af, hdrsize; 547 caddr_t hdr; 548 549 hlen = ETHER_HDR_LEN; 550 eh = mtod(m, struct ether_header *); 551 552 ether_type = htons(eh->ether_type); 553 554 if (ether_type < ETHERMTU) { 555 /* LLC/SNAP */ 556 struct llc *llc = (struct llc *)(eh + 1); 557 hlen += 8; 558 559 if (m->m_len < hlen || 560 llc->llc_dsap != LLC_SNAP_LSAP || 561 llc->llc_ssap != LLC_SNAP_LSAP || 562 llc->llc_control != LLC_UI) { 563 /* Not SNAP. */ 564 goto bad; 565 } 566 567 ether_type = htons(llc->llc_un.type_snap.ether_type); 568 } 569 570 switch (ether_type) { 571 case ETHERTYPE_IP: 572 af = AF_INET; 573 hdrsize = 20; /* sizeof(struct ip) */ 574 break; 575 576 case ETHERTYPE_IPV6: 577 af = AF_INET6; 578 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 579 break; 580 581 default: 582 af = AF_UNSPEC; 583 hdrsize = 0; 584 break; 585 } 586 587 if (m->m_len < (hlen + hdrsize)) { 588 /* 589 * Ethernet and protocol header not in a single 590 * mbuf. We can't cope with this situation right 591 * now (but it shouldn't ever happen, really, anyhow). 592 * XXX Should use m_pulldown(). 593 */ 594 printf("altq_etherclassify: headers span multiple mbufs: " 595 "%d < %d\n", m->m_len, (hlen + hdrsize)); 596 goto bad; 597 } 598 599 m->m_data += hlen; 600 m->m_len -= hlen; 601 602 hdr = mtod(m, caddr_t); 603 604 if (ALTQ_NEEDS_CLASSIFY(ifq)) 605 pktattr->pattr_class = 606 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 607 pktattr->pattr_af = af; 608 pktattr->pattr_hdr = hdr; 609 610 m->m_data -= hlen; 611 m->m_len += hlen; 612 613 return; 614 615 bad: 616 pktattr->pattr_class = NULL; 617 pktattr->pattr_hdr = NULL; 618 pktattr->pattr_af = AF_UNSPEC; 619 } 620 #endif /* ALTQ */ 621 622 /* 623 * Process a received Ethernet packet; 624 * the packet is in the mbuf chain m with 625 * the ether header. 626 */ 627 static void 628 ether_input(struct ifnet *ifp, struct mbuf *m) 629 { 630 struct ifqueue *inq; 631 u_int16_t etype; 632 int s; 633 struct ether_header *eh; 634 struct mbuf *n; 635 #if defined (ISO) || defined (LLC) || defined(NETATALK) 636 struct llc *l; 637 #endif 638 639 if ((ifp->if_flags & IFF_UP) == 0) { 640 m_freem(m); 641 return; 642 } 643 644 eh = mtod(m, struct ether_header *); 645 etype = ntohs(eh->ether_type); 646 647 /* 648 * Determine if the packet is within its size limits. 649 */ 650 if (m->m_pkthdr.len > 651 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 652 printf("%s: discarding oversize frame (len=%d)\n", 653 ifp->if_xname, m->m_pkthdr.len); 654 m_freem(m); 655 return; 656 } 657 658 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 659 /* 660 * If this is not a simplex interface, drop the packet 661 * if it came from us. 662 */ 663 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 664 memcmp(LLADDR(ifp->if_sadl), eh->ether_shost, 665 ETHER_ADDR_LEN) == 0) { 666 m_freem(m); 667 return; 668 } 669 670 if (memcmp(etherbroadcastaddr, 671 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 672 m->m_flags |= M_BCAST; 673 else 674 m->m_flags |= M_MCAST; 675 ifp->if_imcasts++; 676 } 677 678 /* If the CRC is still on the packet, trim it off. */ 679 if (m->m_flags & M_HASFCS) { 680 m_adj(m, -ETHER_CRC_LEN); 681 m->m_flags &= ~M_HASFCS; 682 } 683 684 ifp->if_ibytes += m->m_pkthdr.len; 685 686 #if NBRIDGE > 0 687 /* 688 * Tap the packet off here for a bridge. bridge_input() 689 * will return NULL if it has consumed the packet, otherwise 690 * it gets processed as normal. Note that bridge_input() 691 * will always return the original packet if we need to 692 * process it locally. 693 */ 694 if (ifp->if_bridge) { 695 m = bridge_input(ifp, m); 696 if (m == NULL) 697 return; 698 699 /* 700 * Bridge has determined that the packet is for us. 701 * Update our interface pointer -- we may have had 702 * to "bridge" the packet locally. 703 */ 704 ifp = m->m_pkthdr.rcvif; 705 } 706 #endif /* NBRIDGE > 0 */ 707 708 /* 709 * XXX This comparison is redundant if we are a bridge 710 * XXX and processing the packet locally. 711 */ 712 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0 && 713 (ifp->if_flags & IFF_PROMISC) != 0 && 714 memcmp(LLADDR(ifp->if_sadl), eh->ether_dhost, 715 ETHER_ADDR_LEN) != 0) { 716 m_freem(m); 717 return; 718 } 719 720 #ifdef PFIL_HOOKS 721 if (pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 722 return; 723 if (m == NULL) 724 return; 725 726 eh = mtod(m, struct ether_header *); 727 etype = ntohs(eh->ether_type); 728 #endif 729 730 /* Check if the mbuf has a VLAN tag */ 731 n = m_aux_find(m, AF_LINK, ETHERTYPE_VLAN); 732 if (n) { 733 #if NVLAN > 0 734 /* 735 * vlan_input() will either recursively call ether_input() 736 * or drop the packet. 737 */ 738 if (((struct ethercom *)ifp)->ec_nvlans != 0) 739 vlan_input(ifp, m); 740 else 741 #endif 742 m_freem(m); 743 return; 744 } 745 746 /* 747 * Handle protocols that expect to have the Ethernet header 748 * (and possibly FCS) intact. 749 */ 750 switch (etype) { 751 #if NVLAN > 0 752 case ETHERTYPE_VLAN: 753 /* 754 * vlan_input() will either recursively call ether_input() 755 * or drop the packet. 756 */ 757 if (((struct ethercom *)ifp)->ec_nvlans != 0) 758 vlan_input(ifp, m); 759 else 760 m_freem(m); 761 return; 762 #endif /* NVLAN > 0 */ 763 #if NPPPOE > 0 764 case ETHERTYPE_PPPOEDISC: 765 case ETHERTYPE_PPPOE: 766 if (etype == ETHERTYPE_PPPOEDISC) 767 inq = &ppoediscinq; 768 else 769 inq = &ppoeinq; 770 s = splnet(); 771 if (IF_QFULL(inq)) { 772 IF_DROP(inq); 773 m_freem(m); 774 } else 775 IF_ENQUEUE(inq, m); 776 splx(s); 777 #ifndef __HAVE_GENERIC_SOFT_INTERRUPTS 778 if (!callout_active(&pppoe_softintr)) 779 callout_reset(&pppoe_softintr, 1, pppoe_softintr_handler, NULL); 780 #else 781 softintr_schedule(pppoe_softintr); 782 #endif 783 return; 784 #endif /* NPPPOE > 0 */ 785 default: 786 ; /* Nothing. */ 787 } 788 789 /* Strip off the Ethernet header. */ 790 m_adj(m, sizeof(struct ether_header)); 791 792 /* If the CRC is still on the packet, trim it off. */ 793 if (m->m_flags & M_HASFCS) { 794 m_adj(m, -ETHER_CRC_LEN); 795 m->m_flags &= ~M_HASFCS; 796 } 797 798 switch (etype) { 799 #ifdef INET 800 case ETHERTYPE_IP: 801 #ifdef GATEWAY 802 if (ipflow_fastforward(m)) 803 return; 804 #endif 805 schednetisr(NETISR_IP); 806 inq = &ipintrq; 807 break; 808 809 case ETHERTYPE_ARP: 810 schednetisr(NETISR_ARP); 811 inq = &arpintrq; 812 break; 813 814 case ETHERTYPE_REVARP: 815 revarpinput(m); /* XXX queue? */ 816 return; 817 #endif 818 #ifdef INET6 819 case ETHERTYPE_IPV6: 820 schednetisr(NETISR_IPV6); 821 inq = &ip6intrq; 822 break; 823 #endif 824 #ifdef NS 825 case ETHERTYPE_NS: 826 schednetisr(NETISR_NS); 827 inq = &nsintrq; 828 break; 829 830 #endif 831 #ifdef IPX 832 case ETHERTYPE_IPX: 833 schednetisr(NETISR_IPX); 834 inq = &ipxintrq; 835 break; 836 #endif 837 #ifdef NETATALK 838 case ETHERTYPE_ATALK: 839 schednetisr(NETISR_ATALK); 840 inq = &atintrq1; 841 break; 842 case ETHERTYPE_AARP: 843 /* probably this should be done with a NETISR as well */ 844 aarpinput(ifp, m); /* XXX */ 845 return; 846 #endif /* NETATALK */ 847 default: 848 #if defined (ISO) || defined (LLC) || defined (NETATALK) 849 if (etype > ETHERMTU) 850 goto dropanyway; 851 l = mtod(m, struct llc *); 852 switch (l->llc_dsap) { 853 #ifdef NETATALK 854 case LLC_SNAP_LSAP: 855 switch (l->llc_control) { 856 case LLC_UI: 857 if (l->llc_ssap != LLC_SNAP_LSAP) { 858 goto dropanyway; 859 } 860 861 if (Bcmp(&(l->llc_snap_org_code)[0], 862 at_org_code, sizeof(at_org_code)) == 0 && 863 ntohs(l->llc_snap_ether_type) == 864 ETHERTYPE_ATALK) { 865 inq = &atintrq2; 866 m_adj(m, sizeof(struct llc)); 867 schednetisr(NETISR_ATALK); 868 break; 869 } 870 871 if (Bcmp(&(l->llc_snap_org_code)[0], 872 aarp_org_code, 873 sizeof(aarp_org_code)) == 0 && 874 ntohs(l->llc_snap_ether_type) == 875 ETHERTYPE_AARP) { 876 m_adj( m, sizeof(struct llc)); 877 aarpinput(ifp, m); /* XXX */ 878 return; 879 } 880 881 default: 882 goto dropanyway; 883 } 884 break; 885 #endif /* NETATALK */ 886 #ifdef ISO 887 case LLC_ISO_LSAP: 888 switch (l->llc_control) { 889 case LLC_UI: 890 /* LLC_UI_P forbidden in class 1 service */ 891 if ((l->llc_dsap == LLC_ISO_LSAP) && 892 (l->llc_ssap == LLC_ISO_LSAP)) { 893 /* LSAP for ISO */ 894 if (m->m_pkthdr.len > etype) 895 m_adj(m, etype - m->m_pkthdr.len); 896 m->m_data += 3; /* XXX */ 897 m->m_len -= 3; /* XXX */ 898 m->m_pkthdr.len -= 3; /* XXX */ 899 M_PREPEND(m, sizeof *eh, M_DONTWAIT); 900 if (m == 0) 901 return; 902 *mtod(m, struct ether_header *) = *eh; 903 #ifdef ARGO_DEBUG 904 if (argo_debug[D_ETHER]) 905 printf("clnp packet"); 906 #endif 907 schednetisr(NETISR_ISO); 908 inq = &clnlintrq; 909 break; 910 } 911 goto dropanyway; 912 913 case LLC_XID: 914 case LLC_XID_P: 915 if(m->m_len < 6) 916 goto dropanyway; 917 l->llc_window = 0; 918 l->llc_fid = 9; 919 l->llc_class = 1; 920 l->llc_dsap = l->llc_ssap = 0; 921 /* Fall through to */ 922 case LLC_TEST: 923 case LLC_TEST_P: 924 { 925 struct sockaddr sa; 926 struct ether_header *eh2; 927 int i; 928 u_char c = l->llc_dsap; 929 930 l->llc_dsap = l->llc_ssap; 931 l->llc_ssap = c; 932 if (m->m_flags & (M_BCAST | M_MCAST)) 933 bcopy(LLADDR(ifp->if_sadl), 934 (caddr_t)eh->ether_dhost, 6); 935 sa.sa_family = AF_UNSPEC; 936 sa.sa_len = sizeof(sa); 937 eh2 = (struct ether_header *)sa.sa_data; 938 for (i = 0; i < 6; i++) { 939 eh2->ether_shost[i] = c = 940 eh->ether_dhost[i]; 941 eh2->ether_dhost[i] = 942 eh->ether_dhost[i] = 943 eh->ether_shost[i]; 944 eh->ether_shost[i] = c; 945 } 946 ifp->if_output(ifp, m, &sa, NULL); 947 return; 948 } 949 default: 950 m_freem(m); 951 return; 952 } 953 break; 954 #endif /* ISO */ 955 #ifdef LLC 956 case LLC_X25_LSAP: 957 { 958 if (m->m_pkthdr.len > etype) 959 m_adj(m, etype - m->m_pkthdr.len); 960 M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT); 961 if (m == 0) 962 return; 963 if ( !sdl_sethdrif(ifp, eh->ether_shost, LLC_X25_LSAP, 964 eh->ether_dhost, LLC_X25_LSAP, 6, 965 mtod(m, struct sdl_hdr *))) 966 panic("ETHER cons addr failure"); 967 mtod(m, struct sdl_hdr *)->sdlhdr_len = etype; 968 #ifdef LLC_DEBUG 969 printf("llc packet\n"); 970 #endif /* LLC_DEBUG */ 971 schednetisr(NETISR_CCITT); 972 inq = &llcintrq; 973 break; 974 } 975 #endif /* LLC */ 976 dropanyway: 977 default: 978 m_freem(m); 979 return; 980 } 981 #else /* ISO || LLC || NETATALK*/ 982 m_freem(m); 983 return; 984 #endif /* ISO || LLC || NETATALK*/ 985 } 986 987 s = splnet(); 988 if (IF_QFULL(inq)) { 989 IF_DROP(inq); 990 m_freem(m); 991 } else 992 IF_ENQUEUE(inq, m); 993 splx(s); 994 } 995 996 /* 997 * Convert Ethernet address to printable (loggable) representation. 998 */ 999 static char digits[] = "0123456789abcdef"; 1000 char * 1001 ether_sprintf(const u_char *ap) 1002 { 1003 static char etherbuf[18]; 1004 char *cp = etherbuf; 1005 int i; 1006 1007 for (i = 0; i < 6; i++) { 1008 *cp++ = digits[*ap >> 4]; 1009 *cp++ = digits[*ap++ & 0xf]; 1010 *cp++ = ':'; 1011 } 1012 *--cp = 0; 1013 return (etherbuf); 1014 } 1015 1016 /* 1017 * Perform common duties while attaching to interface list 1018 */ 1019 void 1020 ether_ifattach(struct ifnet *ifp, const u_int8_t *lla) 1021 { 1022 1023 ifp->if_type = IFT_ETHER; 1024 ifp->if_addrlen = ETHER_ADDR_LEN; 1025 ifp->if_hdrlen = 14; 1026 ifp->if_dlt = DLT_EN10MB; 1027 ifp->if_mtu = ETHERMTU; 1028 ifp->if_output = ether_output; 1029 ifp->if_input = ether_input; 1030 if (ifp->if_baudrate == 0) 1031 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 1032 1033 if_alloc_sadl(ifp); 1034 memcpy(LLADDR(ifp->if_sadl), lla, ifp->if_addrlen); 1035 1036 LIST_INIT(&((struct ethercom *)ifp)->ec_multiaddrs); 1037 ifp->if_broadcastaddr = etherbroadcastaddr; 1038 #if NBPFILTER > 0 1039 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 1040 #endif 1041 } 1042 1043 void 1044 ether_ifdetach(struct ifnet *ifp) 1045 { 1046 struct ethercom *ec = (void *) ifp; 1047 struct ether_multi *enm; 1048 int s; 1049 1050 #if NBPFILTER > 0 1051 bpfdetach(ifp); 1052 #endif 1053 1054 #if NVLAN > 0 1055 if (ec->ec_nvlans) 1056 vlan_ifdetach(ifp); 1057 #endif 1058 1059 s = splnet(); 1060 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1061 LIST_REMOVE(enm, enm_list); 1062 free(enm, M_IFADDR); 1063 ec->ec_multicnt--; 1064 } 1065 splx(s); 1066 1067 if_free_sadl(ifp); 1068 } 1069 1070 #if 0 1071 /* 1072 * This is for reference. We have a table-driven version 1073 * of the little-endian crc32 generator, which is faster 1074 * than the double-loop. 1075 */ 1076 u_int32_t 1077 ether_crc32_le(const u_int8_t *buf, size_t len) 1078 { 1079 u_int32_t c, crc, carry; 1080 size_t i, j; 1081 1082 crc = 0xffffffffU; /* initial value */ 1083 1084 for (i = 0; i < len; i++) { 1085 c = buf[i]; 1086 for (j = 0; j < 8; j++) { 1087 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1088 crc >>= 1; 1089 c >>= 1; 1090 if (carry) 1091 crc = (crc ^ ETHER_CRC_POLY_LE); 1092 } 1093 } 1094 1095 return (crc); 1096 } 1097 #else 1098 u_int32_t 1099 ether_crc32_le(const u_int8_t *buf, size_t len) 1100 { 1101 static const u_int32_t crctab[] = { 1102 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1103 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1104 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1105 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1106 }; 1107 u_int32_t crc; 1108 int i; 1109 1110 crc = 0xffffffffU; /* initial value */ 1111 1112 for (i = 0; i < len; i++) { 1113 crc ^= buf[i]; 1114 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1115 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1116 } 1117 1118 return (crc); 1119 } 1120 #endif 1121 1122 u_int32_t 1123 ether_crc32_be(const u_int8_t *buf, size_t len) 1124 { 1125 u_int32_t c, crc, carry; 1126 size_t i, j; 1127 1128 crc = 0xffffffffU; /* initial value */ 1129 1130 for (i = 0; i < len; i++) { 1131 c = buf[i]; 1132 for (j = 0; j < 8; j++) { 1133 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1134 crc <<= 1; 1135 c >>= 1; 1136 if (carry) 1137 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1138 } 1139 } 1140 1141 return (crc); 1142 } 1143 1144 #ifdef INET 1145 u_char ether_ipmulticast_min[6] = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1146 u_char ether_ipmulticast_max[6] = { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1147 #endif 1148 #ifdef INET6 1149 u_char ether_ip6multicast_min[6] = { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1150 u_char ether_ip6multicast_max[6] = { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1151 #endif 1152 1153 /* 1154 * Convert a sockaddr into an Ethernet address or range of Ethernet 1155 * addresses. 1156 */ 1157 int 1158 ether_multiaddr(struct sockaddr *sa, u_int8_t addrlo[ETHER_ADDR_LEN], 1159 u_int8_t addrhi[ETHER_ADDR_LEN]) 1160 { 1161 #ifdef INET 1162 struct sockaddr_in *sin; 1163 #endif /* INET */ 1164 #ifdef INET6 1165 struct sockaddr_in6 *sin6; 1166 #endif /* INET6 */ 1167 1168 switch (sa->sa_family) { 1169 1170 case AF_UNSPEC: 1171 bcopy(sa->sa_data, addrlo, ETHER_ADDR_LEN); 1172 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1173 break; 1174 1175 #ifdef INET 1176 case AF_INET: 1177 sin = satosin(sa); 1178 if (sin->sin_addr.s_addr == INADDR_ANY) { 1179 /* 1180 * An IP address of INADDR_ANY means listen to 1181 * or stop listening to all of the Ethernet 1182 * multicast addresses used for IP. 1183 * (This is for the sake of IP multicast routers.) 1184 */ 1185 bcopy(ether_ipmulticast_min, addrlo, ETHER_ADDR_LEN); 1186 bcopy(ether_ipmulticast_max, addrhi, ETHER_ADDR_LEN); 1187 } 1188 else { 1189 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1190 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1191 } 1192 break; 1193 #endif 1194 #ifdef INET6 1195 case AF_INET6: 1196 sin6 = satosin6(sa); 1197 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1198 /* 1199 * An IP6 address of 0 means listen to or stop 1200 * listening to all of the Ethernet multicast 1201 * address used for IP6. 1202 * (This is used for multicast routers.) 1203 */ 1204 bcopy(ether_ip6multicast_min, addrlo, ETHER_ADDR_LEN); 1205 bcopy(ether_ip6multicast_max, addrhi, ETHER_ADDR_LEN); 1206 } else { 1207 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1208 bcopy(addrlo, addrhi, ETHER_ADDR_LEN); 1209 } 1210 break; 1211 #endif 1212 1213 default: 1214 return (EAFNOSUPPORT); 1215 } 1216 return (0); 1217 } 1218 1219 /* 1220 * Add an Ethernet multicast address or range of addresses to the list for a 1221 * given interface. 1222 */ 1223 int 1224 ether_addmulti(struct ifreq *ifr, struct ethercom *ec) 1225 { 1226 struct ether_multi *enm; 1227 u_char addrlo[ETHER_ADDR_LEN]; 1228 u_char addrhi[ETHER_ADDR_LEN]; 1229 int s = splnet(), error; 1230 1231 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1232 if (error != 0) { 1233 splx(s); 1234 return (error); 1235 } 1236 1237 /* 1238 * Verify that we have valid Ethernet multicast addresses. 1239 */ 1240 if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) { 1241 splx(s); 1242 return (EINVAL); 1243 } 1244 /* 1245 * See if the address range is already in the list. 1246 */ 1247 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1248 if (enm != NULL) { 1249 /* 1250 * Found it; just increment the reference count. 1251 */ 1252 ++enm->enm_refcount; 1253 splx(s); 1254 return (0); 1255 } 1256 /* 1257 * New address or range; malloc a new multicast record 1258 * and link it into the interface's multicast list. 1259 */ 1260 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1261 if (enm == NULL) { 1262 splx(s); 1263 return (ENOBUFS); 1264 } 1265 bcopy(addrlo, enm->enm_addrlo, 6); 1266 bcopy(addrhi, enm->enm_addrhi, 6); 1267 enm->enm_ec = ec; 1268 enm->enm_refcount = 1; 1269 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1270 ec->ec_multicnt++; 1271 splx(s); 1272 /* 1273 * Return ENETRESET to inform the driver that the list has changed 1274 * and its reception filter should be adjusted accordingly. 1275 */ 1276 return (ENETRESET); 1277 } 1278 1279 /* 1280 * Delete a multicast address record. 1281 */ 1282 int 1283 ether_delmulti(struct ifreq *ifr, struct ethercom *ec) 1284 { 1285 struct ether_multi *enm; 1286 u_char addrlo[ETHER_ADDR_LEN]; 1287 u_char addrhi[ETHER_ADDR_LEN]; 1288 int s = splnet(), error; 1289 1290 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); 1291 if (error != 0) { 1292 splx(s); 1293 return (error); 1294 } 1295 1296 /* 1297 * Look ur the address in our list. 1298 */ 1299 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1300 if (enm == NULL) { 1301 splx(s); 1302 return (ENXIO); 1303 } 1304 if (--enm->enm_refcount != 0) { 1305 /* 1306 * Still some claims to this record. 1307 */ 1308 splx(s); 1309 return (0); 1310 } 1311 /* 1312 * No remaining claims to this record; unlink and free it. 1313 */ 1314 LIST_REMOVE(enm, enm_list); 1315 free(enm, M_IFMADDR); 1316 ec->ec_multicnt--; 1317 splx(s); 1318 /* 1319 * Return ENETRESET to inform the driver that the list has changed 1320 * and its reception filter should be adjusted accordingly. 1321 */ 1322 return (ENETRESET); 1323 } 1324 1325 /* 1326 * Common ioctls for Ethernet interfaces. Note, we must be 1327 * called at splnet(). 1328 */ 1329 int 1330 ether_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) 1331 { 1332 struct ethercom *ec = (void *) ifp; 1333 struct ifreq *ifr = (struct ifreq *)data; 1334 struct ifaddr *ifa = (struct ifaddr *)data; 1335 int error = 0; 1336 1337 switch (cmd) { 1338 case SIOCSIFADDR: 1339 ifp->if_flags |= IFF_UP; 1340 switch (ifa->ifa_addr->sa_family) { 1341 case AF_LINK: 1342 { 1343 struct sockaddr_dl *sdl = 1344 (struct sockaddr_dl *) ifa->ifa_addr; 1345 1346 if (sdl->sdl_type != IFT_ETHER || 1347 sdl->sdl_alen != ifp->if_addrlen) { 1348 error = EINVAL; 1349 break; 1350 } 1351 1352 memcpy(LLADDR(ifp->if_sadl), LLADDR(sdl), 1353 ifp->if_addrlen); 1354 1355 /* Set new address. */ 1356 error = (*ifp->if_init)(ifp); 1357 break; 1358 } 1359 #ifdef INET 1360 case AF_INET: 1361 if ((ifp->if_flags & IFF_RUNNING) == 0 && 1362 (error = (*ifp->if_init)(ifp)) != 0) 1363 break; 1364 arp_ifinit(ifp, ifa); 1365 break; 1366 #endif /* INET */ 1367 #ifdef NS 1368 case AF_NS: 1369 { 1370 struct ns_addr *ina = &IA_SNS(ifa)->sns_addr; 1371 1372 if (ns_nullhost(*ina)) 1373 ina->x_host = *(union ns_host *) 1374 LLADDR(ifp->if_sadl); 1375 else 1376 memcpy(LLADDR(ifp->if_sadl), 1377 ina->x_host.c_host, ifp->if_addrlen); 1378 /* Set new address. */ 1379 error = (*ifp->if_init)(ifp); 1380 break; 1381 } 1382 #endif /* NS */ 1383 default: 1384 if ((ifp->if_flags & IFF_RUNNING) == 0) 1385 error = (*ifp->if_init)(ifp); 1386 break; 1387 } 1388 break; 1389 1390 case SIOCGIFADDR: 1391 memcpy(((struct sockaddr *)&ifr->ifr_data)->sa_data, 1392 LLADDR(ifp->if_sadl), ETHER_ADDR_LEN); 1393 break; 1394 1395 case SIOCSIFMTU: 1396 { 1397 int maxmtu; 1398 1399 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1400 maxmtu = ETHERMTU_JUMBO; 1401 else 1402 maxmtu = ETHERMTU; 1403 1404 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1405 error = EINVAL; 1406 else { 1407 ifp->if_mtu = ifr->ifr_mtu; 1408 1409 /* Make sure the device notices the MTU change. */ 1410 if (ifp->if_flags & IFF_UP) 1411 error = (*ifp->if_init)(ifp); 1412 } 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 30 10:09:55 GMT 2025