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