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