if_ethersubr.c revision 72175
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: head/sys/net/if_ethersubr.c 72175 2001-02-08 17:56:49Z archie $ 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> 74int (*ef_inputp)(struct ifnet*, struct ether_header *eh, struct mbuf *m); 75int (*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> 82ushort ns_nettype; 83int ether_outputdebug = 0; 84int 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 95extern u_char at_org_code[3]; 96extern 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) */ 109void (*ng_ether_input_p)(struct ifnet *ifp, 110 struct mbuf **mp, struct ether_header *eh); 111void (*ng_ether_input_orphan_p)(struct ifnet *ifp, 112 struct mbuf *m, struct ether_header *eh); 113int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp); 114void (*ng_ether_attach_p)(struct ifnet *ifp); 115void (*ng_ether_detach_p)(struct ifnet *ifp); 116 117static int ether_resolvemulti __P((struct ifnet *, struct sockaddr **, 118 struct sockaddr *)); 119u_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 */ 130int 131ether_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) { 339bad: 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 */ 357int 358ether_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 struct ifnet *oifp = ifp ; 368 369 m->m_pkthdr.rcvif = NULL; 370 eh = mtod(m, struct ether_header *); 371 m_adj(m, ETHER_HDR_LEN); 372 ifp = bridge_dst_lookup(eh); 373 if (ifp > BDG_FORWARD && !BDG_SAMECLUSTER(ifp, oifp)) { 374 printf("ether_out_frame: bad output if\n"); 375 } 376 m = bdg_forward(m, eh, ifp); 377 if (m != NULL) 378 m_freem(m); 379 return (0); 380 } 381#endif 382 383 /* 384 * Queue message on interface, update output statistics if 385 * successful, and start output if interface not yet active. 386 */ 387 if (! IF_HANDOFF(&ifp->if_snd, m, ifp)) 388 return (ENOBUFS); 389 return (error); 390} 391 392/* 393 * Process a received Ethernet packet; 394 * the packet is in the mbuf chain m without 395 * the ether header, which is provided separately. 396 * 397 * NOTA BENE: for many drivers "eh" is a pointer into the first mbuf or 398 * cluster, right before m_data. So be very careful when working on m, 399 * as you could destroy *eh !! 400 * A (probably) more convenient and efficient interface to ether_input 401 * is to have the whole packet (with the ethernet header) into the mbuf: 402 * modules which do not need the ethernet header can easily drop it, while 403 * others (most noticeably bridge and ng_ether) do not need to do additional 404 * work to put the ethernet header back into the mbuf. 405 * 406 * First we perform any link layer operations, then continue 407 * to the upper layers with ether_demux(). 408 */ 409void 410ether_input(ifp, eh, m) 411 struct ifnet *ifp; 412 struct ether_header *eh; 413 struct mbuf *m; 414{ 415#ifdef BRIDGE 416 struct ether_header save_eh; 417#endif 418 419 /* Check for a BPF tap */ 420 if (ifp->if_bpf != NULL) { 421 struct m_hdr mh; 422 423 /* This kludge is OK; BPF treats the "mbuf" as read-only */ 424 mh.mh_next = m; 425 mh.mh_data = (char *)eh; 426 mh.mh_len = ETHER_HDR_LEN; 427 bpf_mtap(ifp, (struct mbuf *)&mh); 428 } 429 430 /* Handle ng_ether(4) processing, if any */ 431 if (ng_ether_input_p != NULL) { 432 (*ng_ether_input_p)(ifp, &m, eh); 433 if (m == NULL) 434 return; 435 } 436 437#ifdef BRIDGE 438 /* Check for bridging mode */ 439 if (do_bridge && BDG_USED(ifp) ) { 440 struct ifnet *bif; 441 442 /* Check with bridging code */ 443 if ((bif = bridge_in(ifp, eh)) == BDG_DROP) { 444 m_freem(m); 445 return; 446 } 447 if (bif != BDG_LOCAL) { 448 struct mbuf *oldm = m ; 449 450 save_eh = *eh ; /* because it might change */ 451 m = bdg_forward(&m, eh, bif); /* needs forwarding */ 452 /* 453 * Do not continue if bdg_forward() processed our 454 * packet (and cleared the mbuf pointer m) or if 455 * it dropped (m_free'd) the packet itself. 456 */ 457 if (m == NULL) { 458 if (bif == BDG_BCAST || bif == BDG_MCAST) 459 printf("bdg_forward drop MULTICAST PKT\n"); 460 return; 461 } 462 if (m != oldm) /* m changed! */ 463 eh = &save_eh ; 464 } 465 if (bif == BDG_LOCAL 466 || bif == BDG_BCAST 467 || bif == BDG_MCAST) 468 goto recvLocal; /* receive locally */ 469 470 /* If not local and not multicast, just drop it */ 471 if (m != NULL) 472 m_freem(m); 473 return; 474 } 475#endif 476 477#ifdef BRIDGE 478recvLocal: 479#endif 480 /* Continue with upper layer processing */ 481 ether_demux(ifp, eh, m); 482} 483 484/* 485 * Upper layer processing for a received Ethernet packet. 486 */ 487void 488ether_demux(ifp, eh, m) 489 struct ifnet *ifp; 490 struct ether_header *eh; 491 struct mbuf *m; 492{ 493 struct ifqueue *inq; 494 u_short ether_type; 495#if defined(NETATALK) 496 register struct llc *l; 497#endif 498 499 /* Discard packet if upper layers shouldn't see it because it was 500 unicast to a different Ethernet address. If the driver is working 501 properly, then this situation can only happen when the interface 502 is in promiscuous mode. */ 503 if ((ifp->if_flags & IFF_PROMISC) != 0 504 && (eh->ether_dhost[0] & 1) == 0 505 && bcmp(eh->ether_dhost, 506 IFP2AC(ifp)->ac_enaddr, ETHER_ADDR_LEN) != 0) { 507 m_freem(m); 508 return; 509 } 510 511 /* Discard packet if interface is not up */ 512 if ((ifp->if_flags & IFF_UP) == 0) { 513 m_freem(m); 514 return; 515 } 516 ifp->if_ibytes += m->m_pkthdr.len + sizeof (*eh); 517 if (eh->ether_dhost[0] & 1) { 518 if (bcmp((caddr_t)etherbroadcastaddr, (caddr_t)eh->ether_dhost, 519 sizeof(etherbroadcastaddr)) == 0) 520 m->m_flags |= M_BCAST; 521 else 522 m->m_flags |= M_MCAST; 523 } 524 if (m->m_flags & (M_BCAST|M_MCAST)) 525 ifp->if_imcasts++; 526 527 ether_type = ntohs(eh->ether_type); 528 529#if NVLAN > 0 530 if (ether_type == vlan_proto) { 531 if (vlan_input(eh, m) < 0) 532 ifp->if_data.ifi_noproto++; 533 return; 534 } 535#endif /* NVLAN > 0 */ 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 schednetisr(NETISR_ARP); 548 inq = &arpintrq; 549 break; 550#endif 551#ifdef IPX 552 case ETHERTYPE_IPX: 553 if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 554 return; 555 schednetisr(NETISR_IPX); 556 inq = &ipxintrq; 557 break; 558#endif 559#ifdef INET6 560 case ETHERTYPE_IPV6: 561 schednetisr(NETISR_IPV6); 562 inq = &ip6intrq; 563 break; 564#endif 565#ifdef NS 566 case 0x8137: /* Novell Ethernet_II Ethernet TYPE II */ 567 schednetisr(NETISR_NS); 568 inq = &nsintrq; 569 break; 570 571#endif /* NS */ 572#ifdef NETATALK 573 case ETHERTYPE_AT: 574 schednetisr(NETISR_ATALK); 575 inq = &atintrq1; 576 break; 577 case ETHERTYPE_AARP: 578 /* probably this should be done with a NETISR as well */ 579 aarpinput(IFP2AC(ifp), m); /* XXX */ 580 return; 581#endif NETATALK 582 default: 583#ifdef IPX 584 if (ef_inputp && ef_inputp(ifp, eh, m) == 0) 585 return; 586#endif /* IPX */ 587#ifdef NS 588 checksum = mtod(m, ushort *); 589 /* Novell 802.3 */ 590 if ((ether_type <= ETHERMTU) && 591 ((*checksum == 0xffff) || (*checksum == 0xE0E0))){ 592 if(*checksum == 0xE0E0) { 593 m->m_pkthdr.len -= 3; 594 m->m_len -= 3; 595 m->m_data += 3; 596 } 597 schednetisr(NETISR_NS); 598 inq = &nsintrq; 599 break; 600 } 601#endif /* NS */ 602#if defined(NETATALK) 603 if (ether_type > ETHERMTU) 604 goto dropanyway; 605 l = mtod(m, struct llc *); 606 switch (l->llc_dsap) { 607 case LLC_SNAP_LSAP: 608 switch (l->llc_control) { 609 case LLC_UI: 610 if (l->llc_ssap != LLC_SNAP_LSAP) 611 goto dropanyway; 612 613 if (Bcmp(&(l->llc_snap_org_code)[0], at_org_code, 614 sizeof(at_org_code)) == 0 && 615 ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) { 616 inq = &atintrq2; 617 m_adj( m, sizeof( struct llc )); 618 schednetisr(NETISR_ATALK); 619 break; 620 } 621 622 if (Bcmp(&(l->llc_snap_org_code)[0], aarp_org_code, 623 sizeof(aarp_org_code)) == 0 && 624 ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) { 625 m_adj( m, sizeof( struct llc )); 626 aarpinput(IFP2AC(ifp), m); /* XXX */ 627 return; 628 } 629 630 default: 631 goto dropanyway; 632 } 633 break; 634 dropanyway: 635 default: 636 if (ng_ether_input_orphan_p != NULL) 637 (*ng_ether_input_orphan_p)(ifp, m, eh); 638 else 639 m_freem(m); 640 return; 641 } 642#else /* NETATALK */ 643 if (ng_ether_input_orphan_p != NULL) 644 (*ng_ether_input_orphan_p)(ifp, m, eh); 645 else 646 m_freem(m); 647 return; 648#endif /* NETATALK */ 649 } 650 651 (void) IF_HANDOFF(inq, m, NULL); 652} 653 654/* 655 * Perform common duties while attaching to interface list 656 */ 657void 658ether_ifattach(ifp, bpf) 659 register struct ifnet *ifp; 660 int bpf; 661{ 662 register struct ifaddr *ifa; 663 register struct sockaddr_dl *sdl; 664 665 if_attach(ifp); 666 ifp->if_type = IFT_ETHER; 667 ifp->if_addrlen = 6; 668 ifp->if_hdrlen = 14; 669 ifp->if_mtu = ETHERMTU; 670 ifp->if_resolvemulti = ether_resolvemulti; 671 if (ifp->if_baudrate == 0) 672 ifp->if_baudrate = 10000000; 673 ifa = ifnet_addrs[ifp->if_index - 1]; 674 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __FUNCTION__)); 675 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 676 sdl->sdl_type = IFT_ETHER; 677 sdl->sdl_alen = ifp->if_addrlen; 678 bcopy((IFP2AC(ifp))->ac_enaddr, LLADDR(sdl), ifp->if_addrlen); 679 if (bpf) 680 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 681 if (ng_ether_attach_p != NULL) 682 (*ng_ether_attach_p)(ifp); 683#ifdef BRIDGE 684 bdgtakeifaces(); 685#endif 686} 687 688/* 689 * Perform common duties while detaching an Ethernet interface 690 */ 691void 692ether_ifdetach(ifp, bpf) 693 struct ifnet *ifp; 694 int bpf; 695{ 696 if (ng_ether_detach_p != NULL) 697 (*ng_ether_detach_p)(ifp); 698 if (bpf) 699 bpfdetach(ifp); 700 if_detach(ifp); 701#ifdef BRIDGE 702 bdgtakeifaces(); 703#endif 704} 705 706SYSCTL_DECL(_net_link); 707SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); 708 709int 710ether_ioctl(ifp, command, data) 711 struct ifnet *ifp; 712 int command; 713 caddr_t data; 714{ 715 struct ifaddr *ifa = (struct ifaddr *) data; 716 struct ifreq *ifr = (struct ifreq *) data; 717 int error = 0; 718 719 switch (command) { 720 case SIOCSIFADDR: 721 ifp->if_flags |= IFF_UP; 722 723 switch (ifa->ifa_addr->sa_family) { 724#ifdef INET 725 case AF_INET: 726 ifp->if_init(ifp->if_softc); /* before arpwhohas */ 727 arp_ifinit(IFP2AC(ifp), ifa); 728 break; 729#endif 730#ifdef IPX 731 /* 732 * XXX - This code is probably wrong 733 */ 734 case AF_IPX: 735 { 736 register struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr); 737 struct arpcom *ac = IFP2AC(ifp); 738 739 if (ipx_nullhost(*ina)) 740 ina->x_host = 741 *(union ipx_host *) 742 ac->ac_enaddr; 743 else { 744 bcopy((caddr_t) ina->x_host.c_host, 745 (caddr_t) ac->ac_enaddr, 746 sizeof(ac->ac_enaddr)); 747 } 748 749 /* 750 * Set new address 751 */ 752 ifp->if_init(ifp->if_softc); 753 break; 754 } 755#endif 756#ifdef NS 757 /* 758 * XXX - This code is probably wrong 759 */ 760 case AF_NS: 761 { 762 register struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr); 763 struct arpcom *ac = IFP2AC(ifp); 764 765 if (ns_nullhost(*ina)) 766 ina->x_host = 767 *(union ns_host *) (ac->ac_enaddr); 768 else { 769 bcopy((caddr_t) ina->x_host.c_host, 770 (caddr_t) ac->ac_enaddr, 771 sizeof(ac->ac_enaddr)); 772 } 773 774 /* 775 * Set new address 776 */ 777 ifp->if_init(ifp->if_softc); 778 break; 779 } 780#endif 781 default: 782 ifp->if_init(ifp->if_softc); 783 break; 784 } 785 break; 786 787 case SIOCGIFADDR: 788 { 789 struct sockaddr *sa; 790 791 sa = (struct sockaddr *) & ifr->ifr_data; 792 bcopy(IFP2AC(ifp)->ac_enaddr, 793 (caddr_t) sa->sa_data, ETHER_ADDR_LEN); 794 } 795 break; 796 797 case SIOCSIFMTU: 798 /* 799 * Set the interface MTU. 800 */ 801 if (ifr->ifr_mtu > ETHERMTU) { 802 error = EINVAL; 803 } else { 804 ifp->if_mtu = ifr->ifr_mtu; 805 } 806 break; 807 } 808 return (error); 809} 810 811int 812ether_resolvemulti(ifp, llsa, sa) 813 struct ifnet *ifp; 814 struct sockaddr **llsa; 815 struct sockaddr *sa; 816{ 817 struct sockaddr_dl *sdl; 818 struct sockaddr_in *sin; 819#ifdef INET6 820 struct sockaddr_in6 *sin6; 821#endif 822 u_char *e_addr; 823 824 switch(sa->sa_family) { 825 case AF_LINK: 826 /* 827 * No mapping needed. Just check that it's a valid MC address. 828 */ 829 sdl = (struct sockaddr_dl *)sa; 830 e_addr = LLADDR(sdl); 831 if ((e_addr[0] & 1) != 1) 832 return EADDRNOTAVAIL; 833 *llsa = 0; 834 return 0; 835 836#ifdef INET 837 case AF_INET: 838 sin = (struct sockaddr_in *)sa; 839 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 840 return EADDRNOTAVAIL; 841 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 842 M_WAITOK); 843 sdl->sdl_len = sizeof *sdl; 844 sdl->sdl_family = AF_LINK; 845 sdl->sdl_index = ifp->if_index; 846 sdl->sdl_type = IFT_ETHER; 847 sdl->sdl_nlen = 0; 848 sdl->sdl_alen = ETHER_ADDR_LEN; 849 sdl->sdl_slen = 0; 850 e_addr = LLADDR(sdl); 851 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 852 *llsa = (struct sockaddr *)sdl; 853 return 0; 854#endif 855#ifdef INET6 856 case AF_INET6: 857 sin6 = (struct sockaddr_in6 *)sa; 858 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 859 /* 860 * An IP6 address of 0 means listen to all 861 * of the Ethernet multicast address used for IP6. 862 * (This is used for multicast routers.) 863 */ 864 ifp->if_flags |= IFF_ALLMULTI; 865 *llsa = 0; 866 return 0; 867 } 868 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 869 return EADDRNOTAVAIL; 870 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 871 M_WAITOK); 872 sdl->sdl_len = sizeof *sdl; 873 sdl->sdl_family = AF_LINK; 874 sdl->sdl_index = ifp->if_index; 875 sdl->sdl_type = IFT_ETHER; 876 sdl->sdl_nlen = 0; 877 sdl->sdl_alen = ETHER_ADDR_LEN; 878 sdl->sdl_slen = 0; 879 e_addr = LLADDR(sdl); 880 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 881 *llsa = (struct sockaddr *)sdl; 882 return 0; 883#endif 884 885 default: 886 /* 887 * Well, the text isn't quite right, but it's the name 888 * that counts... 889 */ 890 return EAFNOSUPPORT; 891 } 892} 893 894