1 /* 2 * Copyright (c) 1982, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93 34 * $FreeBSD$ 35 */ 36 37 #include "opt_atalk.h" 38 #include "opt_inet.h" 39 #include "opt_inet6.h" 40 #include "opt_ipx.h" 41 #include "opt_bdg.h" 42 #include "opt_netgraph.h" 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/malloc.h> 48 #include <sys/mbuf.h> 49 #include <sys/random.h> 50 #include <sys/socket.h> 51 #include <sys/sockio.h> 52 #include <sys/sysctl.h> 53 54 #include <net/if.h> 55 #include <net/netisr.h> 56 #include <net/route.h> 57 #include <net/if_llc.h> 58 #include <net/if_dl.h> 59 #include <net/if_types.h> 60 #include <net/bpf.h> 61 #include <net/ethernet.h> 62 #include <net/bridge.h> 63 64 #if defined(INET) || defined(INET6) 65 #include <netinet/in.h> 66 #include <netinet/in_var.h> 67 #include <netinet/if_ether.h> 68 #endif 69 #ifdef INET6 70 #include <netinet6/nd6.h> 71 #endif 72 73 #ifdef IPX 74 #include <netipx/ipx.h> 75 #include <netipx/ipx_if.h> 76 int (*ef_inputp)(struct ifnet*, struct ether_header *eh, struct mbuf *m); 77 int (*ef_outputp)(struct ifnet *ifp, struct mbuf **mp, 78 struct sockaddr *dst, short *tp, int *hlen); 79 #endif 80 81 #ifdef NS 82 #include <netns/ns.h> 83 #include <netns/ns_if.h> 84 ushort ns_nettype; 85 int ether_outputdebug = 0; 86 int ether_inputdebug = 0; 87 #endif 88 89 #ifdef NETATALK 90 #include <netatalk/at.h> 91 #include <netatalk/at_var.h> 92 #include <netatalk/at_extern.h> 93 94 #define llc_snap_org_code llc_un.type_snap.org_code 95 #define llc_snap_ether_type llc_un.type_snap.ether_type 96 97 extern u_char at_org_code[3]; 98 extern u_char aarp_org_code[3]; 99 #endif /* NETATALK */ 100 101 /* netgraph node hooks for ng_ether(4) */ 102 void (*ng_ether_input_p)(struct ifnet *ifp, 103 struct mbuf **mp, struct ether_header *eh); 104 void (*ng_ether_input_orphan_p)(struct ifnet *ifp, 105 struct mbuf *m, struct ether_header *eh); 106 int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp); 107 void (*ng_ether_attach_p)(struct ifnet *ifp); 108 void (*ng_ether_detach_p)(struct ifnet *ifp); 109 110 int (*vlan_input_p)(struct ether_header *eh, struct mbuf *m); 111 int (*vlan_input_tag_p)(struct ether_header *eh, struct mbuf *m, 112 u_int16_t t); 113 114 /* bridge support */ 115 int do_bridge; 116 bridge_in_t *bridge_in_ptr; 117 bdg_forward_t *bdg_forward_ptr; 118 bdgtakeifaces_t *bdgtakeifaces_ptr; 119 struct bdg_softc *ifp2sc; 120 121 static int ether_resolvemulti(struct ifnet *, struct sockaddr **, 122 struct sockaddr *); 123 u_char etherbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 124 #define senderr(e) do { error = (e); goto bad;} while (0) 125 #define IFP2AC(IFP) ((struct arpcom *)IFP) 126 127 /* 128 * Ethernet output routine. 129 * Encapsulate a packet of type family for the local net. 130 * Use trailer local net encapsulation if enough data in first 131 * packet leaves a multiple of 512 bytes of data in remainder. 132 * Assumes that ifp is actually pointer to arpcom structure. 133 */ 134 int 135 ether_output(ifp, m, dst, rt0) 136 register struct ifnet *ifp; 137 struct mbuf *m; 138 struct sockaddr *dst; 139 struct rtentry *rt0; 140 { 141 short type; 142 int error = 0, hdrcmplt = 0; 143 u_char esrc[6], edst[6]; 144 register struct rtentry *rt; 145 register struct ether_header *eh; 146 int off, loop_copy = 0; 147 int hlen; /* link layer header lenght */ 148 struct arpcom *ac = IFP2AC(ifp); 149 150 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 151 senderr(ENETDOWN); 152 rt = rt0; 153 if (rt) { 154 if ((rt->rt_flags & RTF_UP) == 0) { 155 rt0 = rt = rtalloc1(dst, 1, 0UL); 156 if (rt0) 157 rt->rt_refcnt--; 158 else 159 senderr(EHOSTUNREACH); 160 } 161 if (rt->rt_flags & RTF_GATEWAY) { 162 if (rt->rt_gwroute == 0) 163 goto lookup; 164 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 165 rtfree(rt); rt = rt0; 166 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1, 167 0UL); 168 if ((rt = rt->rt_gwroute) == 0) 169 senderr(EHOSTUNREACH); 170 } 171 } 172 if (rt->rt_flags & RTF_REJECT) 173 if (rt->rt_rmx.rmx_expire == 0 || 174 time_second < rt->rt_rmx.rmx_expire) 175 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 176 } 177 hlen = ETHER_HDR_LEN; 178 switch (dst->sa_family) { 179 #ifdef INET 180 case AF_INET: 181 if (!arpresolve(ifp, rt, m, dst, edst, rt0)) 182 return (0); /* if not yet resolved */ 183 off = m->m_pkthdr.len - m->m_len; 184 type = htons(ETHERTYPE_IP); 185 break; 186 #endif 187 #ifdef INET6 188 case AF_INET6: 189 if (!nd6_storelladdr(&ac->ac_if, rt, m, dst, (u_char *)edst)) { 190 /* Something bad happened */ 191 return(0); 192 } 193 off = m->m_pkthdr.len - m->m_len; 194 type = htons(ETHERTYPE_IPV6); 195 break; 196 #endif 197 #ifdef IPX 198 case AF_IPX: 199 if (ef_outputp) { 200 error = ef_outputp(ifp, &m, dst, &type, &hlen); 201 if (error) 202 goto bad; 203 } else 204 type = htons(ETHERTYPE_IPX); 205 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 206 (caddr_t)edst, sizeof (edst)); 207 break; 208 #endif 209 #ifdef NETATALK 210 case AF_APPLETALK: 211 { 212 struct at_ifaddr *aa; 213 214 if ((aa = at_ifawithnet((struct sockaddr_at *)dst)) == NULL) { 215 goto bad; 216 } 217 if (!aarpresolve(ac, m, (struct sockaddr_at *)dst, edst)) 218 return (0); 219 /* 220 * In the phase 2 case, need to prepend an mbuf for the llc header. 221 * Since we must preserve the value of m, which is passed to us by 222 * value, we m_copy() the first mbuf, and use it for our llc header. 223 */ 224 if ( aa->aa_flags & AFA_PHASE2 ) { 225 struct llc llc; 226 227 M_PREPEND(m, sizeof(struct llc), M_TRYWAIT); 228 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 229 llc.llc_control = LLC_UI; 230 bcopy(at_org_code, llc.llc_snap_org_code, sizeof(at_org_code)); 231 llc.llc_snap_ether_type = htons( ETHERTYPE_AT ); 232 bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc)); 233 type = htons(m->m_pkthdr.len); 234 hlen = sizeof(struct llc) + ETHER_HDR_LEN; 235 } else { 236 type = htons(ETHERTYPE_AT); 237 } 238 break; 239 } 240 #endif /* NETATALK */ 241 #ifdef NS 242 case AF_NS: 243 switch(ns_nettype){ 244 default: 245 case 0x8137: /* Novell Ethernet_II Ethernet TYPE II */ 246 type = 0x8137; 247 break; 248 case 0x0: /* Novell 802.3 */ 249 type = htons( m->m_pkthdr.len); 250 break; 251 case 0xe0e0: /* Novell 802.2 and Token-Ring */ 252 M_PREPEND(m, 3, M_TRYWAIT); 253 type = htons( m->m_pkthdr.len); 254 cp = mtod(m, u_char *); 255 *cp++ = 0xE0; 256 *cp++ = 0xE0; 257 *cp++ = 0x03; 258 break; 259 } 260 bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host), 261 (caddr_t)edst, sizeof (edst)); 262 /* 263 * XXX if ns_thishost is the same as the node's ethernet 264 * address then just the default code will catch this anyhow. 265 * So I'm not sure if this next clause should be here at all? 266 * [JRE] 267 */ 268 if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst))){ 269 m->m_pkthdr.rcvif = ifp; 270 inq = &nsintrq; 271 if (IF_HANDOFF(inq, m, NULL)) 272 schednetisr(NETISR_NS); 273 return (error); 274 } 275 if (!bcmp((caddr_t)edst, (caddr_t)&ns_broadhost, sizeof(edst))){ 276 m->m_flags |= M_BCAST; 277 } 278 break; 279 #endif /* NS */ 280 281 case pseudo_AF_HDRCMPLT: 282 hdrcmplt = 1; 283 eh = (struct ether_header *)dst->sa_data; 284 (void)memcpy(esrc, eh->ether_shost, sizeof (esrc)); 285 /* FALLTHROUGH */ 286 287 case AF_UNSPEC: 288 loop_copy = -1; /* if this is for us, don't do it */ 289 eh = (struct ether_header *)dst->sa_data; 290 (void)memcpy(edst, eh->ether_dhost, sizeof (edst)); 291 type = eh->ether_type; 292 break; 293 294 default: 295 printf("%s%d: can't handle af%d\n", ifp->if_name, ifp->if_unit, 296 dst->sa_family); 297 senderr(EAFNOSUPPORT); 298 } 299 300 /* 301 * Add local net header. If no space in first mbuf, 302 * allocate another. 303 */ 304 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 305 if (m == 0) 306 senderr(ENOBUFS); 307 eh = mtod(m, struct ether_header *); 308 (void)memcpy(&eh->ether_type, &type, 309 sizeof(eh->ether_type)); 310 (void)memcpy(eh->ether_dhost, edst, sizeof (edst)); 311 if (hdrcmplt) 312 (void)memcpy(eh->ether_shost, esrc, 313 sizeof(eh->ether_shost)); 314 else 315 (void)memcpy(eh->ether_shost, ac->ac_enaddr, 316 sizeof(eh->ether_shost)); 317 318 /* 319 * If a simplex interface, and the packet is being sent to our 320 * Ethernet address or a broadcast address, loopback a copy. 321 * XXX To make a simplex device behave exactly like a duplex 322 * device, we should copy in the case of sending to our own 323 * ethernet address (thus letting the original actually appear 324 * on the wire). However, we don't do that here for security 325 * reasons and compatibility with the original behavior. 326 */ 327 if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) { 328 int csum_flags = 0; 329 330 if (m->m_pkthdr.csum_flags & CSUM_IP) 331 csum_flags |= (CSUM_IP_CHECKED|CSUM_IP_VALID); 332 if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) 333 csum_flags |= (CSUM_DATA_VALID|CSUM_PSEUDO_HDR); 334 if ((m->m_flags & M_BCAST) || (loop_copy > 0)) { 335 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 336 337 n->m_pkthdr.csum_flags |= csum_flags; 338 if (csum_flags & CSUM_DATA_VALID) 339 n->m_pkthdr.csum_data = 0xffff; 340 341 (void) if_simloop(ifp, n, dst->sa_family, hlen); 342 } else if (bcmp(eh->ether_dhost, 343 eh->ether_shost, ETHER_ADDR_LEN) == 0) { 344 m->m_pkthdr.csum_flags |= csum_flags; 345 if (csum_flags & CSUM_DATA_VALID) 346 m->m_pkthdr.csum_data = 0xffff; 347 (void) if_simloop(ifp, m, dst->sa_family, hlen); 348 return (0); /* XXX */ 349 } 350 } 351 352 /* Handle ng_ether(4) processing, if any */ 353 if (ng_ether_output_p != NULL) { 354 if ((error = (*ng_ether_output_p)(ifp, &m)) != 0) { 355 bad: if (m != NULL) 356 m_freem(m); 357 return (error); 358 } 359 if (m == NULL) 360 return (0); 361 } 362 363 /* Continue with link-layer output */ 364 return ether_output_frame(ifp, m); 365 } 366 367 /* 368 * Ethernet link layer output routine to send a raw frame to the device. 369 * 370 * This assumes that the 14 byte Ethernet header is present and contiguous 371 * in the first mbuf (if BRIDGE'ing). 372 */ 373 int 374 ether_output_frame(ifp, m) 375 struct ifnet *ifp; 376 struct mbuf *m; 377 { 378 int error = 0; 379 380 if (BDG_ACTIVE(ifp) ) { 381 struct ether_header *eh; /* a ptr suffices */ 382 383 m->m_pkthdr.rcvif = NULL; 384 eh = mtod(m, struct ether_header *); 385 m_adj(m, ETHER_HDR_LEN); 386 m = bdg_forward_ptr(m, eh, ifp); 387 if (m != NULL) 388 m_freem(m); 389 return (0); 390 } 391 392 /* 393 * Queue message on interface, update output statistics if 394 * successful, and start output if interface not yet active. 395 */ 396 if (! IF_HANDOFF(&ifp->if_snd, m, ifp)) 397 return (ENOBUFS); 398 return (error); 399 } 400 401 /* 402 * Process a received Ethernet packet; 403 * the packet is in the mbuf chain m without 404 * the ether header, which is provided separately. 405 * 406 * NOTA BENE: for many drivers "eh" is a pointer into the first mbuf or 407 * cluster, right before m_data. So be very careful when working on m, 408 * as you could destroy *eh !! 409 * A (probably) more convenient and efficient interface to ether_input 410 * is to have the whole packet (with the ethernet header) into the mbuf: 411 * modules which do not need the ethernet header can easily drop it, while 412 * others (most noticeably bridge and ng_ether) do not need to do additional 413 * work to put the ethernet header back into the mbuf. 414 * 415 * First we perform any link layer operations, then continue 416 * to the upper layers with ether_demux(). 417 */ 418 void 419 ether_input(ifp, eh, m) 420 struct ifnet *ifp; 421 struct ether_header *eh; 422 struct mbuf *m; 423 { 424 struct ether_header save_eh; 425 426 /* Check for a BPF tap */ 427 if (ifp->if_bpf != NULL) { 428 struct m_hdr mh; 429 430 /* This kludge is OK; BPF treats the "mbuf" as read-only */ 431 mh.mh_next = m; 432 mh.mh_data = (char *)eh; 433 mh.mh_len = ETHER_HDR_LEN; 434 bpf_mtap(ifp, (struct mbuf *)&mh); 435 } 436 437 ifp->if_ibytes += m->m_pkthdr.len + sizeof (*eh); 438 439 /* Handle ng_ether(4) processing, if any */ 440 if (ng_ether_input_p != NULL) { 441 (*ng_ether_input_p)(ifp, &m, eh); 442 if (m == NULL) 443 return; 444 } 445 446 /* Check for bridging mode */ 447 if (BDG_ACTIVE(ifp) ) { 448 struct ifnet *bif; 449 450 /* Check with bridging code */ 451 if ((bif = bridge_in_ptr(ifp, eh)) == BDG_DROP) { 452 m_freem(m); 453 return; 454 } 455 if (bif != BDG_LOCAL) { 456 struct mbuf *oldm = m ; 457 458 save_eh = *eh ; /* because it might change */ 459 m = bdg_forward_ptr(m, eh, bif); /* needs forwarding */ 460 /* 461 * Do not continue if bdg_forward_ptr() processed our 462 * packet (and cleared the mbuf pointer m) or if 463 * it dropped (m_free'd) the packet itself. 464 */ 465 if (m == NULL) { 466 if (bif == BDG_BCAST || bif == BDG_MCAST) 467 printf("bdg_forward drop MULTICAST PKT\n"); 468 return; 469 } 470 if (m != oldm) /* m changed! */ 471 eh = &save_eh ; 472 } 473 if (bif == BDG_LOCAL 474 || bif == BDG_BCAST 475 || bif == BDG_MCAST) 476 goto recvLocal; /* receive locally */ 477 478 /* If not local and not multicast, just drop it */ 479 if (m != NULL) 480 m_freem(m); 481 return; 482 } 483 484 recvLocal: 485 /* Continue with upper layer processing */ 486 ether_demux(ifp, eh, m); 487 /* First chunk of an mbuf contains good junk */ 488 if (harvest.ethernet) 489 random_harvest(m, 16, 3, 0, RANDOM_NET); 490 } 491 492 /* 493 * Upper layer processing for a received Ethernet packet. 494 */ 495 void 496 ether_demux(ifp, eh, m) 497 struct ifnet *ifp; 498 struct ether_header *eh; 499 struct mbuf *m; 500 { 501 struct ifqueue *inq; 502 u_short ether_type; 503 #if defined(NETATALK) 504 register struct llc *l; 505 #endif 506 507 if (! (BDG_ACTIVE(ifp) ) ) 508 /* Discard packet if upper layers shouldn't see it because it was 509 unicast to a different Ethernet address. If the driver is working 510 properly, then this situation can only happen when the interface 511 is in promiscuous mode. */ 512 if ((ifp->if_flags & IFF_PROMISC) != 0 513 && (eh->ether_dhost[0] & 1) == 0 514 && bcmp(eh->ether_dhost, 515 IFP2AC(ifp)->ac_enaddr, ETHER_ADDR_LEN) != 0) { 516 m_freem(m); 517 return; 518 } 519 520 /* Discard packet if interface is not up */ 521 if ((ifp->if_flags & IFF_UP) == 0) { 522 m_freem(m); 523 return; 524 } 525 if (eh->ether_dhost[0] & 1) { 526 if (bcmp((caddr_t)etherbroadcastaddr, (caddr_t)eh->ether_dhost, 527 sizeof(etherbroadcastaddr)) == 0) 528 m->m_flags |= M_BCAST; 529 else 530 m->m_flags |= M_MCAST; 531 } 532 if (m->m_flags & (M_BCAST|M_MCAST)) 533 ifp->if_imcasts++; 534 535 ether_type = ntohs(eh->ether_type); 536 537 switch (ether_type) { 538 #ifdef INET 539 case ETHERTYPE_IP: 540 if (ipflow_fastforward(m)) 541 return; 542 schednetisr(NETISR_IP); 543 inq = &ipintrq; 544 break; 545 546 case ETHERTYPE_ARP: 547 if (ifp->if_flags & IFF_NOARP) { 548 /* Discard packet if ARP is disabled on interface */ 549 m_freem(m); 550 return; 551 } 552 schednetisr(NETISR_ARP); 553 inq = &arpintrq; 554 break; 555 #endif 556 #ifdef IPX 557 case ETHERTYPE_IPX: 558 if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 559 return; 560 schednetisr(NETISR_IPX); 561 inq = &ipxintrq; 562 break; 563 #endif 564 #ifdef INET6 565 case ETHERTYPE_IPV6: 566 schednetisr(NETISR_IPV6); 567 inq = &ip6intrq; 568 break; 569 #endif 570 #ifdef NS 571 case 0x8137: /* Novell Ethernet_II Ethernet TYPE II */ 572 schednetisr(NETISR_NS); 573 inq = &nsintrq; 574 break; 575 576 #endif /* NS */ 577 #ifdef NETATALK 578 case ETHERTYPE_AT: 579 schednetisr(NETISR_ATALK); 580 inq = &atintrq1; 581 break; 582 case ETHERTYPE_AARP: 583 /* probably this should be done with a NETISR as well */ 584 aarpinput(IFP2AC(ifp), m); /* XXX */ 585 return; 586 #endif /* NETATALK */ 587 case ETHERTYPE_VLAN: 588 /* XXX lock ? */ 589 if (vlan_input_p != NULL) 590 (*vlan_input_p)(eh, m); 591 else { 592 m->m_pkthdr.rcvif->if_noproto++; 593 m_freem(m); 594 } 595 /* XXX unlock ? */ 596 return; 597 default: 598 #ifdef IPX 599 if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 600 return; 601 #endif /* IPX */ 602 #ifdef NS 603 checksum = mtod(m, ushort *); 604 /* Novell 802.3 */ 605 if ((ether_type <= ETHERMTU) && 606 ((*checksum == 0xffff) || (*checksum == 0xE0E0))){ 607 if(*checksum == 0xE0E0) { 608 m->m_pkthdr.len -= 3; 609 m->m_len -= 3; 610 m->m_data += 3; 611 } 612 schednetisr(NETISR_NS); 613 inq = &nsintrq; 614 break; 615 } 616 #endif /* NS */ 617 #if defined(NETATALK) 618 if (ether_type > ETHERMTU) 619 goto dropanyway; 620 l = mtod(m, struct llc *); 621 switch (l->llc_dsap) { 622 case LLC_SNAP_LSAP: 623 switch (l->llc_control) { 624 case LLC_UI: 625 if (l->llc_ssap != LLC_SNAP_LSAP) 626 goto dropanyway; 627 628 if (Bcmp(&(l->llc_snap_org_code)[0], at_org_code, 629 sizeof(at_org_code)) == 0 && 630 ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) { 631 inq = &atintrq2; 632 m_adj( m, sizeof( struct llc )); 633 schednetisr(NETISR_ATALK); 634 break; 635 } 636 637 if (Bcmp(&(l->llc_snap_org_code)[0], aarp_org_code, 638 sizeof(aarp_org_code)) == 0 && 639 ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) { 640 m_adj( m, sizeof( struct llc )); 641 aarpinput(IFP2AC(ifp), m); /* XXX */ 642 return; 643 } 644 645 default: 646 goto dropanyway; 647 } 648 break; 649 dropanyway: 650 default: 651 if (ng_ether_input_orphan_p != NULL) 652 (*ng_ether_input_orphan_p)(ifp, m, eh); 653 else 654 m_freem(m); 655 return; 656 } 657 #else /* NETATALK */ 658 if (ng_ether_input_orphan_p != NULL) 659 (*ng_ether_input_orphan_p)(ifp, m, eh); 660 else 661 m_freem(m); 662 return; 663 #endif /* NETATALK */ 664 } 665 666 (void) IF_HANDOFF(inq, m, NULL); 667 } 668 669 /* 670 * Perform common duties while attaching to interface list 671 */ 672 void 673 ether_ifattach(ifp, bpf) 674 register struct ifnet *ifp; 675 int bpf; 676 { 677 register struct ifaddr *ifa; 678 register struct sockaddr_dl *sdl; 679 680 ifp->if_type = IFT_ETHER; 681 ifp->if_addrlen = 6; 682 ifp->if_hdrlen = 14; 683 if_attach(ifp); 684 ifp->if_mtu = ETHERMTU; 685 ifp->if_resolvemulti = ether_resolvemulti; 686 if (ifp->if_baudrate == 0) 687 ifp->if_baudrate = 10000000; 688 ifp->if_broadcastaddr = etherbroadcastaddr; 689 ifa = ifaddr_byindex(ifp->if_index); 690 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 691 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 692 sdl->sdl_type = IFT_ETHER; 693 sdl->sdl_alen = ifp->if_addrlen; 694 bcopy((IFP2AC(ifp))->ac_enaddr, LLADDR(sdl), ifp->if_addrlen); 695 if (bpf) 696 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 697 if (ng_ether_attach_p != NULL) 698 (*ng_ether_attach_p)(ifp); 699 if (BDG_LOADED) 700 bdgtakeifaces_ptr(); 701 } 702 703 /* 704 * Perform common duties while detaching an Ethernet interface 705 */ 706 void 707 ether_ifdetach(ifp, bpf) 708 struct ifnet *ifp; 709 int bpf; 710 { 711 if (ng_ether_detach_p != NULL) 712 (*ng_ether_detach_p)(ifp); 713 if (bpf) 714 bpfdetach(ifp); 715 if_detach(ifp); 716 if (BDG_LOADED) 717 bdgtakeifaces_ptr(); 718 } 719 720 SYSCTL_DECL(_net_link); 721 SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); 722 723 int 724 ether_ioctl(ifp, command, data) 725 struct ifnet *ifp; 726 int command; 727 caddr_t data; 728 { 729 struct ifaddr *ifa = (struct ifaddr *) data; 730 struct ifreq *ifr = (struct ifreq *) data; 731 int error = 0; 732 733 switch (command) { 734 case SIOCSIFADDR: 735 ifp->if_flags |= IFF_UP; 736 737 switch (ifa->ifa_addr->sa_family) { 738 #ifdef INET 739 case AF_INET: 740 ifp->if_init(ifp->if_softc); /* before arpwhohas */ 741 arp_ifinit(ifp, ifa); 742 break; 743 #endif 744 #ifdef IPX 745 /* 746 * XXX - This code is probably wrong 747 */ 748 case AF_IPX: 749 { 750 register struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr); 751 struct arpcom *ac = IFP2AC(ifp); 752 753 if (ipx_nullhost(*ina)) 754 ina->x_host = 755 *(union ipx_host *) 756 ac->ac_enaddr; 757 else { 758 bcopy((caddr_t) ina->x_host.c_host, 759 (caddr_t) ac->ac_enaddr, 760 sizeof(ac->ac_enaddr)); 761 } 762 763 /* 764 * Set new address 765 */ 766 ifp->if_init(ifp->if_softc); 767 break; 768 } 769 #endif 770 #ifdef NS 771 /* 772 * XXX - This code is probably wrong 773 */ 774 case AF_NS: 775 { 776 register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr); 777 struct arpcom *ac = IFP2AC(ifp); 778 779 if (ns_nullhost(*ina)) 780 ina->x_host = 781 *(union ns_host *) (ac->ac_enaddr); 782 else { 783 bcopy((caddr_t) ina->x_host.c_host, 784 (caddr_t) ac->ac_enaddr, 785 sizeof(ac->ac_enaddr)); 786 } 787 788 /* 789 * Set new address 790 */ 791 ifp->if_init(ifp->if_softc); 792 break; 793 } 794 #endif 795 default: 796 ifp->if_init(ifp->if_softc); 797 break; 798 } 799 break; 800 801 case SIOCGIFADDR: 802 { 803 struct sockaddr *sa; 804 805 sa = (struct sockaddr *) & ifr->ifr_data; 806 bcopy(IFP2AC(ifp)->ac_enaddr, 807 (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 808 } 809 break; 810 811 case SIOCSIFMTU: 812 /* 813 * Set the interface MTU. 814 */ 815 if (ifr->ifr_mtu > ETHERMTU) { 816 error = EINVAL; 817 } else { 818 ifp->if_mtu = ifr->ifr_mtu; 819 } 820 break; 821 } 822 return (error); 823 } 824 825 int 826 ether_resolvemulti(ifp, llsa, sa) 827 struct ifnet *ifp; 828 struct sockaddr **llsa; 829 struct sockaddr *sa; 830 { 831 struct sockaddr_dl *sdl; 832 struct sockaddr_in *sin; 833 #ifdef INET6 834 struct sockaddr_in6 *sin6; 835 #endif 836 u_char *e_addr; 837 838 switch(sa->sa_family) { 839 case AF_LINK: 840 /* 841 * No mapping needed. Just check that it's a valid MC address. 842 */ 843 sdl = (struct sockaddr_dl *)sa; 844 e_addr = LLADDR(sdl); 845 if ((e_addr[0] & 1) != 1) 846 return EADDRNOTAVAIL; 847 *llsa = 0; 848 return 0; 849 850 #ifdef INET 851 case AF_INET: 852 sin = (struct sockaddr_in *)sa; 853 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 854 return EADDRNOTAVAIL; 855 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 856 M_WAITOK|M_ZERO); 857 sdl->sdl_len = sizeof *sdl; 858 sdl->sdl_family = AF_LINK; 859 sdl->sdl_index = ifp->if_index; 860 sdl->sdl_type = IFT_ETHER; 861 sdl->sdl_alen = ETHER_ADDR_LEN; 862 e_addr = LLADDR(sdl); 863 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 864 *llsa = (struct sockaddr *)sdl; 865 return 0; 866 #endif 867 #ifdef INET6 868 case AF_INET6: 869 sin6 = (struct sockaddr_in6 *)sa; 870 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 871 /* 872 * An IP6 address of 0 means listen to all 873 * of the Ethernet multicast address used for IP6. 874 * (This is used for multicast routers.) 875 */ 876 ifp->if_flags |= IFF_ALLMULTI; 877 *llsa = 0; 878 return 0; 879 } 880 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 881 return EADDRNOTAVAIL; 882 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 883 M_WAITOK|M_ZERO); 884 sdl->sdl_len = sizeof *sdl; 885 sdl->sdl_family = AF_LINK; 886 sdl->sdl_index = ifp->if_index; 887 sdl->sdl_type = IFT_ETHER; 888 sdl->sdl_alen = ETHER_ADDR_LEN; 889 e_addr = LLADDR(sdl); 890 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 891 *llsa = (struct sockaddr *)sdl; 892 return 0; 893 #endif 894 895 default: 896 /* 897 * Well, the text isn't quite right, but it's the name 898 * that counts... 899 */ 900 return EAFNOSUPPORT; 901 } 902 } 903 904