if_ethersubr.c revision 1.197
1 /* $NetBSD: if_ethersubr.c,v 1.197 2014/05/13 19:36:16 bouyer Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1982, 1989, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)if_ethersubr.c 8.2 (Berkeley) 4/4/96 61 */ 62 63 #include <sys/cdefs.h> 64 __KERNEL_RCSID(0, "$NetBSD: if_ethersubr.c,v 1.197 2014/05/13 19:36:16 bouyer Exp $"); 65 66 #include "opt_inet.h" 67 #include "opt_atalk.h" 68 #include "opt_ipx.h" 69 #include "opt_mbuftrace.h" 70 #include "opt_mpls.h" 71 #include "opt_gateway.h" 72 #include "opt_pppoe.h" 73 #include "vlan.h" 74 #include "pppoe.h" 75 #include "bridge.h" 76 #include "arp.h" 77 #include "agr.h" 78 79 #include <sys/param.h> 80 #include <sys/systm.h> 81 #include <sys/kernel.h> 82 #include <sys/callout.h> 83 #include <sys/malloc.h> 84 #include <sys/mbuf.h> 85 #include <sys/protosw.h> 86 #include <sys/socket.h> 87 #include <sys/ioctl.h> 88 #include <sys/errno.h> 89 #include <sys/syslog.h> 90 #include <sys/kauth.h> 91 #include <sys/cpu.h> 92 #include <sys/intr.h> 93 #include <sys/device.h> 94 95 #include <net/if.h> 96 #include <net/netisr.h> 97 #include <net/route.h> 98 #include <net/if_llc.h> 99 #include <net/if_dl.h> 100 #include <net/if_types.h> 101 102 #include <net/if_media.h> 103 #include <dev/mii/mii.h> 104 #include <dev/mii/miivar.h> 105 106 #if NARP == 0 107 /* 108 * XXX there should really be a way to issue this warning from within config(8) 109 */ 110 #error You have included NETATALK or a pseudo-device in your configuration that depends on the presence of ethernet interfaces, but have no such interfaces configured. Check if you really need pseudo-device bridge, pppoe, vlan or options NETATALK. 111 #endif 112 113 #include <net/bpf.h> 114 115 #include <net/if_ether.h> 116 #include <net/if_vlanvar.h> 117 118 #if NPPPOE > 0 119 #include <net/if_pppoe.h> 120 #endif 121 122 #if NAGR > 0 123 #include <net/agr/ieee8023_slowprotocols.h> /* XXX */ 124 #include <net/agr/ieee8023ad.h> 125 #include <net/agr/if_agrvar.h> 126 #endif 127 128 #if NBRIDGE > 0 129 #include <net/if_bridgevar.h> 130 #endif 131 132 #include <netinet/in.h> 133 #ifdef INET 134 #include <netinet/in_var.h> 135 #endif 136 #include <netinet/if_inarp.h> 137 138 #ifdef INET6 139 #ifndef INET 140 #include <netinet/in.h> 141 #endif 142 #include <netinet6/in6_var.h> 143 #include <netinet6/nd6.h> 144 #endif 145 146 147 #include "carp.h" 148 #if NCARP > 0 149 #include <netinet/ip_carp.h> 150 #endif 151 152 #ifdef IPX 153 #include <netipx/ipx.h> 154 #include <netipx/ipx_if.h> 155 #endif 156 157 #ifdef NETATALK 158 #include <netatalk/at.h> 159 #include <netatalk/at_var.h> 160 #include <netatalk/at_extern.h> 161 162 #define llc_snap_org_code llc_un.type_snap.org_code 163 #define llc_snap_ether_type llc_un.type_snap.ether_type 164 165 extern u_char at_org_code[3]; 166 extern u_char aarp_org_code[3]; 167 #endif /* NETATALK */ 168 169 #ifdef MPLS 170 #include <netmpls/mpls.h> 171 #include <netmpls/mpls_var.h> 172 #endif 173 174 static struct timeval bigpktppslim_last; 175 static int bigpktppslim = 2; /* XXX */ 176 static int bigpktpps_count; 177 178 179 const uint8_t etherbroadcastaddr[ETHER_ADDR_LEN] = 180 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 181 const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] = 182 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 }; 183 #define senderr(e) { error = (e); goto bad;} 184 185 static int ether_output(struct ifnet *, struct mbuf *, 186 const struct sockaddr *, struct rtentry *); 187 188 /* 189 * Ethernet output routine. 190 * Encapsulate a packet of type family for the local net. 191 * Assumes that ifp is actually pointer to ethercom structure. 192 */ 193 static int 194 ether_output(struct ifnet * const ifp0, struct mbuf * const m0, 195 const struct sockaddr * const dst, 196 struct rtentry *rt0) 197 { 198 uint16_t etype = 0; 199 int error = 0, hdrcmplt = 0; 200 uint8_t esrc[6], edst[6]; 201 struct mbuf *m = m0; 202 struct rtentry *rt; 203 struct mbuf *mcopy = NULL; 204 struct ether_header *eh; 205 struct ifnet *ifp = ifp0; 206 ALTQ_DECL(struct altq_pktattr pktattr;) 207 #ifdef INET 208 struct arphdr *ah; 209 #endif /* INET */ 210 #ifdef NETATALK 211 struct at_ifaddr *aa; 212 #endif /* NETATALK */ 213 214 KASSERT(KERNEL_LOCKED_P()); 215 216 #ifdef MBUFTRACE 217 m_claimm(m, ifp->if_mowner); 218 #endif 219 220 #if NCARP > 0 221 if (ifp->if_type == IFT_CARP) { 222 struct ifaddr *ifa; 223 224 /* loop back if this is going to the carp interface */ 225 if (dst != NULL && ifp0->if_link_state == LINK_STATE_UP && 226 (ifa = ifa_ifwithaddr(dst)) != NULL && 227 ifa->ifa_ifp == ifp0) 228 return looutput(ifp0, m, dst, rt0); 229 230 ifp = ifp->if_carpdev; 231 /* ac = (struct arpcom *)ifp; */ 232 233 if ((ifp0->if_flags & (IFF_UP|IFF_RUNNING)) != 234 (IFF_UP|IFF_RUNNING)) 235 senderr(ENETDOWN); 236 } 237 #endif /* NCARP > 0 */ 238 239 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 240 senderr(ENETDOWN); 241 if ((rt = rt0) != NULL) { 242 if ((rt->rt_flags & RTF_UP) == 0) { 243 if ((rt0 = rt = rtalloc1(dst, 1)) != NULL) { 244 rt->rt_refcnt--; 245 if (rt->rt_ifp != ifp) 246 return (*rt->rt_ifp->if_output) 247 (ifp, m0, dst, rt); 248 } else 249 senderr(EHOSTUNREACH); 250 } 251 if ((rt->rt_flags & RTF_GATEWAY) && dst->sa_family != AF_NS) { 252 if (rt->rt_gwroute == NULL) 253 goto lookup; 254 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 255 rtfree(rt); rt = rt0; 256 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1); 257 if ((rt = rt->rt_gwroute) == NULL) 258 senderr(EHOSTUNREACH); 259 /* the "G" test below also prevents rt == rt0 */ 260 if ((rt->rt_flags & RTF_GATEWAY) || 261 (rt->rt_ifp != ifp)) { 262 rt->rt_refcnt--; 263 rt0->rt_gwroute = NULL; 264 senderr(EHOSTUNREACH); 265 } 266 } 267 } 268 if (rt->rt_flags & RTF_REJECT) 269 if (rt->rt_rmx.rmx_expire == 0 || 270 (u_long) time_second < rt->rt_rmx.rmx_expire) 271 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 272 } 273 274 switch (dst->sa_family) { 275 276 #ifdef INET 277 case AF_INET: 278 if (m->m_flags & M_BCAST) 279 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 280 else if (m->m_flags & M_MCAST) 281 ETHER_MAP_IP_MULTICAST(&satocsin(dst)->sin_addr, edst); 282 else if (!arpresolve(ifp, rt, m, dst, edst)) 283 return (0); /* if not yet resolved */ 284 /* If broadcasting on a simplex interface, loopback a copy */ 285 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 286 mcopy = m_copy(m, 0, (int)M_COPYALL); 287 etype = htons(ETHERTYPE_IP); 288 break; 289 290 case AF_ARP: 291 ah = mtod(m, struct arphdr *); 292 if (m->m_flags & M_BCAST) 293 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 294 else { 295 void *tha = ar_tha(ah); 296 297 if (tha == NULL) { 298 /* fake with ARPHDR_IEEE1394 */ 299 return 0; 300 } 301 memcpy(edst, tha, sizeof(edst)); 302 } 303 304 ah->ar_hrd = htons(ARPHRD_ETHER); 305 306 switch (ntohs(ah->ar_op)) { 307 case ARPOP_REVREQUEST: 308 case ARPOP_REVREPLY: 309 etype = htons(ETHERTYPE_REVARP); 310 break; 311 312 case ARPOP_REQUEST: 313 case ARPOP_REPLY: 314 default: 315 etype = htons(ETHERTYPE_ARP); 316 } 317 318 break; 319 #endif 320 #ifdef INET6 321 case AF_INET6: 322 if (!nd6_storelladdr(ifp, rt, m, dst, edst, sizeof(edst))){ 323 /* something bad happened */ 324 return (0); 325 } 326 etype = htons(ETHERTYPE_IPV6); 327 break; 328 #endif 329 #ifdef NETATALK 330 case AF_APPLETALK: 331 if (!aarpresolve(ifp, m, (const struct sockaddr_at *)dst, edst)) { 332 #ifdef NETATALKDEBUG 333 printf("aarpresolv failed\n"); 334 #endif /* NETATALKDEBUG */ 335 return (0); 336 } 337 /* 338 * ifaddr is the first thing in at_ifaddr 339 */ 340 aa = (struct at_ifaddr *) at_ifawithnet( 341 (const struct sockaddr_at *)dst, ifp); 342 if (aa == NULL) 343 goto bad; 344 345 /* 346 * In the phase 2 case, we need to prepend an mbuf for the 347 * llc header. Since we must preserve the value of m, 348 * which is passed to us by value, we m_copy() the first 349 * mbuf, and use it for our llc header. 350 */ 351 if (aa->aa_flags & AFA_PHASE2) { 352 struct llc llc; 353 354 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 355 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 356 llc.llc_control = LLC_UI; 357 memcpy(llc.llc_snap_org_code, at_org_code, 358 sizeof(llc.llc_snap_org_code)); 359 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 360 memcpy(mtod(m, void *), &llc, sizeof(struct llc)); 361 } else { 362 etype = htons(ETHERTYPE_ATALK); 363 } 364 break; 365 #endif /* NETATALK */ 366 #ifdef IPX 367 case AF_IPX: 368 etype = htons(ETHERTYPE_IPX); 369 memcpy(edst, 370 &(((const struct sockaddr_ipx *)dst)->sipx_addr.x_host), 371 sizeof(edst)); 372 /* If broadcasting on a simplex interface, loopback a copy */ 373 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 374 mcopy = m_copy(m, 0, (int)M_COPYALL); 375 break; 376 #endif 377 case pseudo_AF_HDRCMPLT: 378 hdrcmplt = 1; 379 memcpy(esrc, 380 ((const struct ether_header *)dst->sa_data)->ether_shost, 381 sizeof(esrc)); 382 /* FALLTHROUGH */ 383 384 case AF_UNSPEC: 385 memcpy(edst, 386 ((const struct ether_header *)dst->sa_data)->ether_dhost, 387 sizeof(edst)); 388 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 389 etype = ((const struct ether_header *)dst->sa_data)->ether_type; 390 break; 391 392 default: 393 printf("%s: can't handle af%d\n", ifp->if_xname, 394 dst->sa_family); 395 senderr(EAFNOSUPPORT); 396 } 397 398 #ifdef MPLS 399 if (rt0 != NULL && rt_gettag(rt0) != NULL && 400 rt_gettag(rt0)->sa_family == AF_MPLS && 401 (m->m_flags & (M_MCAST | M_BCAST)) == 0) { 402 union mpls_shim msh; 403 msh.s_addr = MPLS_GETSADDR(rt0); 404 if (msh.shim.label != MPLS_LABEL_IMPLNULL) 405 etype = htons(ETHERTYPE_MPLS); 406 } 407 #endif 408 409 if (mcopy) 410 (void)looutput(ifp, mcopy, dst, rt); 411 412 /* If no ether type is set, this must be a 802.2 formatted packet. 413 */ 414 if (etype == 0) 415 etype = htons(m->m_pkthdr.len); 416 /* 417 * Add local net header. If no space in first mbuf, 418 * allocate another. 419 */ 420 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 421 if (m == 0) 422 senderr(ENOBUFS); 423 eh = mtod(m, struct ether_header *); 424 /* Note: etype is already in network byte order. */ 425 (void)memcpy(&eh->ether_type, &etype, sizeof(eh->ether_type)); 426 memcpy(eh->ether_dhost, edst, sizeof(edst)); 427 if (hdrcmplt) 428 memcpy(eh->ether_shost, esrc, sizeof(eh->ether_shost)); 429 else 430 memcpy(eh->ether_shost, CLLADDR(ifp->if_sadl), 431 sizeof(eh->ether_shost)); 432 433 #if NCARP > 0 434 if (ifp0 != ifp && ifp0->if_type == IFT_CARP) { 435 memcpy(eh->ether_shost, CLLADDR(ifp0->if_sadl), 436 sizeof(eh->ether_shost)); 437 } 438 #endif /* NCARP > 0 */ 439 440 if ((error = pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 441 return (error); 442 if (m == NULL) 443 return (0); 444 445 #if NBRIDGE > 0 446 /* 447 * Bridges require special output handling. 448 */ 449 if (ifp->if_bridge) 450 return (bridge_output(ifp, m, NULL, NULL)); 451 #endif 452 453 #if NCARP > 0 454 if (ifp != ifp0) 455 ifp0->if_obytes += m->m_pkthdr.len + ETHER_HDR_LEN; 456 #endif /* NCARP > 0 */ 457 458 #ifdef ALTQ 459 /* 460 * If ALTQ is enabled on the parent interface, do 461 * classification; the queueing discipline might not 462 * require classification, but might require the 463 * address family/header pointer in the pktattr. 464 */ 465 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 466 altq_etherclassify(&ifp->if_snd, m, &pktattr); 467 #endif 468 return ifq_enqueue(ifp, m ALTQ_COMMA ALTQ_DECL(&pktattr)); 469 470 bad: 471 if (m) 472 m_freem(m); 473 return (error); 474 } 475 476 #ifdef ALTQ 477 /* 478 * This routine is a slight hack to allow a packet to be classified 479 * if the Ethernet headers are present. It will go away when ALTQ's 480 * classification engine understands link headers. 481 */ 482 void 483 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m, 484 struct altq_pktattr *pktattr) 485 { 486 struct ether_header *eh; 487 uint16_t ether_type; 488 int hlen, af, hdrsize; 489 void *hdr; 490 491 hlen = ETHER_HDR_LEN; 492 eh = mtod(m, struct ether_header *); 493 494 ether_type = htons(eh->ether_type); 495 496 if (ether_type < ETHERMTU) { 497 /* LLC/SNAP */ 498 struct llc *llc = (struct llc *)(eh + 1); 499 hlen += 8; 500 501 if (m->m_len < hlen || 502 llc->llc_dsap != LLC_SNAP_LSAP || 503 llc->llc_ssap != LLC_SNAP_LSAP || 504 llc->llc_control != LLC_UI) { 505 /* Not SNAP. */ 506 goto bad; 507 } 508 509 ether_type = htons(llc->llc_un.type_snap.ether_type); 510 } 511 512 switch (ether_type) { 513 case ETHERTYPE_IP: 514 af = AF_INET; 515 hdrsize = 20; /* sizeof(struct ip) */ 516 break; 517 518 case ETHERTYPE_IPV6: 519 af = AF_INET6; 520 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 521 break; 522 523 default: 524 af = AF_UNSPEC; 525 hdrsize = 0; 526 break; 527 } 528 529 while (m->m_len <= hlen) { 530 hlen -= m->m_len; 531 m = m->m_next; 532 } 533 if (m->m_len < (hlen + hdrsize)) { 534 /* 535 * protocol header not in a single mbuf. 536 * We can't cope with this situation right 537 * now (but it shouldn't ever happen, really, anyhow). 538 */ 539 #ifdef DEBUG 540 printf("altq_etherclassify: headers span multiple mbufs: " 541 "%d < %d\n", m->m_len, (hlen + hdrsize)); 542 #endif 543 goto bad; 544 } 545 546 m->m_data += hlen; 547 m->m_len -= hlen; 548 549 hdr = mtod(m, void *); 550 551 if (ALTQ_NEEDS_CLASSIFY(ifq)) 552 pktattr->pattr_class = 553 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 554 pktattr->pattr_af = af; 555 pktattr->pattr_hdr = hdr; 556 557 m->m_data -= hlen; 558 m->m_len += hlen; 559 560 return; 561 562 bad: 563 pktattr->pattr_class = NULL; 564 pktattr->pattr_hdr = NULL; 565 pktattr->pattr_af = AF_UNSPEC; 566 } 567 #endif /* ALTQ */ 568 569 /* 570 * Process a received Ethernet packet; 571 * the packet is in the mbuf chain m with 572 * the ether header. 573 */ 574 void 575 ether_input(struct ifnet *ifp, struct mbuf *m) 576 { 577 struct ethercom *ec = (struct ethercom *) ifp; 578 struct ifqueue *inq; 579 uint16_t etype; 580 struct ether_header *eh; 581 size_t ehlen; 582 #if defined (LLC) || defined(NETATALK) 583 struct llc *l; 584 #endif 585 586 if ((ifp->if_flags & IFF_UP) == 0) { 587 m_freem(m); 588 return; 589 } 590 591 #ifdef MBUFTRACE 592 m_claimm(m, &ec->ec_rx_mowner); 593 #endif 594 eh = mtod(m, struct ether_header *); 595 etype = ntohs(eh->ether_type); 596 ehlen = sizeof(*eh); 597 598 /* 599 * Determine if the packet is within its size limits. 600 */ 601 if (etype != ETHERTYPE_MPLS && m->m_pkthdr.len > 602 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 603 if (ppsratecheck(&bigpktppslim_last, &bigpktpps_count, 604 bigpktppslim)) { 605 printf("%s: discarding oversize frame (len=%d)\n", 606 ifp->if_xname, m->m_pkthdr.len); 607 } 608 m_freem(m); 609 return; 610 } 611 612 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 613 /* 614 * If this is not a simplex interface, drop the packet 615 * if it came from us. 616 */ 617 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 618 memcmp(CLLADDR(ifp->if_sadl), eh->ether_shost, 619 ETHER_ADDR_LEN) == 0) { 620 m_freem(m); 621 return; 622 } 623 624 if (memcmp(etherbroadcastaddr, 625 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 626 m->m_flags |= M_BCAST; 627 else 628 m->m_flags |= M_MCAST; 629 ifp->if_imcasts++; 630 } 631 632 /* If the CRC is still on the packet, trim it off. */ 633 if (m->m_flags & M_HASFCS) { 634 m_adj(m, -ETHER_CRC_LEN); 635 m->m_flags &= ~M_HASFCS; 636 } 637 638 ifp->if_ibytes += m->m_pkthdr.len; 639 640 #if NBRIDGE > 0 641 /* 642 * Tap the packet off here for a bridge. bridge_input() 643 * will return NULL if it has consumed the packet, otherwise 644 * it gets processed as normal. Note that bridge_input() 645 * will always return the original packet if we need to 646 * process it locally. 647 */ 648 if (ifp->if_bridge) { 649 /* clear M_PROMISC, in case the packets comes from a vlan */ 650 m->m_flags &= ~M_PROMISC; 651 m = bridge_input(ifp, m); 652 if (m == NULL) 653 return; 654 655 /* 656 * Bridge has determined that the packet is for us. 657 * Update our interface pointer -- we may have had 658 * to "bridge" the packet locally. 659 */ 660 ifp = m->m_pkthdr.rcvif; 661 } else 662 #endif /* NBRIDGE > 0 */ 663 { 664 665 #if NCARP > 0 666 if (__predict_false(ifp->if_carp && ifp->if_type != IFT_CARP)) { 667 /* 668 * clear M_PROMISC, in case the packets comes from a 669 * vlan 670 */ 671 m->m_flags &= ~M_PROMISC; 672 if (carp_input(m, (uint8_t *)&eh->ether_shost, 673 (uint8_t *)&eh->ether_dhost, eh->ether_type) == 0) 674 return; 675 } 676 #endif /* NCARP > 0 */ 677 if ((m->m_flags & (M_BCAST|M_MCAST|M_PROMISC)) == 0 && 678 (ifp->if_flags & IFF_PROMISC) != 0 && 679 memcmp(CLLADDR(ifp->if_sadl), eh->ether_dhost, 680 ETHER_ADDR_LEN) != 0) { 681 m->m_flags |= M_PROMISC; 682 } 683 } 684 685 if ((m->m_flags & M_PROMISC) == 0) { 686 if (pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 687 return; 688 if (m == NULL) 689 return; 690 691 eh = mtod(m, struct ether_header *); 692 etype = ntohs(eh->ether_type); 693 ehlen = sizeof(*eh); 694 } 695 696 #if NAGR > 0 697 if (ifp->if_agrprivate && 698 __predict_true(etype != ETHERTYPE_SLOWPROTOCOLS)) { 699 m->m_flags &= ~M_PROMISC; 700 agr_input(ifp, m); 701 return; 702 } 703 #endif /* NAGR > 0 */ 704 705 /* 706 * If VLANs are configured on the interface, check to 707 * see if the device performed the decapsulation and 708 * provided us with the tag. 709 */ 710 if (ec->ec_nvlans && m_tag_find(m, PACKET_TAG_VLAN, NULL) != NULL) { 711 #if NVLAN > 0 712 /* 713 * vlan_input() will either recursively call ether_input() 714 * or drop the packet. 715 */ 716 vlan_input(ifp, m); 717 #else 718 m_freem(m); 719 #endif 720 return; 721 } 722 723 /* 724 * Handle protocols that expect to have the Ethernet header 725 * (and possibly FCS) intact. 726 */ 727 switch (etype) { 728 case ETHERTYPE_VLAN: { 729 struct ether_vlan_header *evl = (void *)eh; 730 /* 731 * If there is a tag of 0, then the VLAN header was probably 732 * just being used to store the priority. Extract the ether 733 * type, and if IP or IPV6, let them deal with it. 734 */ 735 if (m->m_len <= sizeof(*evl) 736 && EVL_VLANOFTAG(evl->evl_tag) == 0) { 737 etype = ntohs(evl->evl_proto); 738 ehlen = sizeof(*evl); 739 if ((m->m_flags & M_PROMISC) == 0 740 && (etype == ETHERTYPE_IP 741 || etype == ETHERTYPE_IPV6)) 742 break; 743 } 744 #if NVLAN > 0 745 /* 746 * vlan_input() will either recursively call ether_input() 747 * or drop the packet. 748 */ 749 if (((struct ethercom *)ifp)->ec_nvlans != 0) 750 vlan_input(ifp, m); 751 else 752 #endif /* NVLAN > 0 */ 753 m_freem(m); 754 return; 755 } 756 #if NPPPOE > 0 757 case ETHERTYPE_PPPOEDISC: 758 case ETHERTYPE_PPPOE: 759 if (m->m_flags & M_PROMISC) { 760 m_freem(m); 761 return; 762 } 763 #ifndef PPPOE_SERVER 764 if (m->m_flags & (M_MCAST | M_BCAST)) { 765 m_freem(m); 766 return; 767 } 768 #endif 769 770 if (etype == ETHERTYPE_PPPOEDISC) 771 inq = &ppoediscinq; 772 else 773 inq = &ppoeinq; 774 if (IF_QFULL(inq)) { 775 IF_DROP(inq); 776 m_freem(m); 777 } else 778 IF_ENQUEUE(inq, m); 779 softint_schedule(pppoe_softintr); 780 return; 781 #endif /* NPPPOE > 0 */ 782 case ETHERTYPE_SLOWPROTOCOLS: { 783 uint8_t subtype; 784 785 #if defined(DIAGNOSTIC) 786 if (m->m_pkthdr.len < sizeof(*eh) + sizeof(subtype)) { 787 panic("ether_input: too short slow protocol packet"); 788 } 789 #endif 790 m_copydata(m, sizeof(*eh), sizeof(subtype), &subtype); 791 switch (subtype) { 792 #if NAGR > 0 793 case SLOWPROTOCOLS_SUBTYPE_LACP: 794 if (ifp->if_agrprivate) { 795 ieee8023ad_lacp_input(ifp, m); 796 return; 797 } 798 break; 799 800 case SLOWPROTOCOLS_SUBTYPE_MARKER: 801 if (ifp->if_agrprivate) { 802 ieee8023ad_marker_input(ifp, m); 803 return; 804 } 805 break; 806 #endif /* NAGR > 0 */ 807 default: 808 if (subtype == 0 || subtype > 10) { 809 /* illegal value */ 810 m_freem(m); 811 return; 812 } 813 /* unknown subtype */ 814 break; 815 } 816 /* FALLTHROUGH */ 817 } 818 default: 819 if (m->m_flags & M_PROMISC) { 820 m_freem(m); 821 return; 822 } 823 } 824 825 /* If the CRC is still on the packet, trim it off. */ 826 if (m->m_flags & M_HASFCS) { 827 m_adj(m, -ETHER_CRC_LEN); 828 m->m_flags &= ~M_HASFCS; 829 } 830 831 if (etype > ETHERMTU + sizeof (struct ether_header)) { 832 /* Strip off the Ethernet header. */ 833 m_adj(m, ehlen); 834 835 switch (etype) { 836 #ifdef INET 837 case ETHERTYPE_IP: 838 #ifdef GATEWAY 839 if (ipflow_fastforward(m)) 840 return; 841 #endif 842 schednetisr(NETISR_IP); 843 inq = &ipintrq; 844 break; 845 846 case ETHERTYPE_ARP: 847 schednetisr(NETISR_ARP); 848 inq = &arpintrq; 849 break; 850 851 case ETHERTYPE_REVARP: 852 revarpinput(m); /* XXX queue? */ 853 return; 854 #endif 855 #ifdef INET6 856 case ETHERTYPE_IPV6: 857 if (__predict_false(!in6_present)) { 858 m_freem(m); 859 return; 860 } 861 #ifdef GATEWAY 862 if (ip6flow_fastforward(&m)) 863 return; 864 #endif 865 schednetisr(NETISR_IPV6); 866 inq = &ip6intrq; 867 break; 868 #endif 869 #ifdef IPX 870 case ETHERTYPE_IPX: 871 schednetisr(NETISR_IPX); 872 inq = &ipxintrq; 873 break; 874 #endif 875 #ifdef NETATALK 876 case ETHERTYPE_ATALK: 877 schednetisr(NETISR_ATALK); 878 inq = &atintrq1; 879 break; 880 case ETHERTYPE_AARP: 881 /* probably this should be done with a NETISR as well */ 882 aarpinput(ifp, m); /* XXX */ 883 return; 884 #endif /* NETATALK */ 885 #ifdef MPLS 886 case ETHERTYPE_MPLS: 887 schednetisr(NETISR_MPLS); 888 inq = &mplsintrq; 889 break; 890 #endif 891 default: 892 m_freem(m); 893 return; 894 } 895 } else { 896 #if defined (LLC) || defined (NETATALK) 897 l = (struct llc *)(eh+1); 898 switch (l->llc_dsap) { 899 #ifdef NETATALK 900 case LLC_SNAP_LSAP: 901 switch (l->llc_control) { 902 case LLC_UI: 903 if (l->llc_ssap != LLC_SNAP_LSAP) { 904 goto dropanyway; 905 } 906 907 if (memcmp(&(l->llc_snap_org_code)[0], 908 at_org_code, sizeof(at_org_code)) == 0 && 909 ntohs(l->llc_snap_ether_type) == 910 ETHERTYPE_ATALK) { 911 inq = &atintrq2; 912 m_adj(m, sizeof(struct ether_header) 913 + sizeof(struct llc)); 914 schednetisr(NETISR_ATALK); 915 break; 916 } 917 918 if (memcmp(&(l->llc_snap_org_code)[0], 919 aarp_org_code, 920 sizeof(aarp_org_code)) == 0 && 921 ntohs(l->llc_snap_ether_type) == 922 ETHERTYPE_AARP) { 923 m_adj( m, sizeof(struct ether_header) 924 + sizeof(struct llc)); 925 aarpinput(ifp, m); /* XXX */ 926 return; 927 } 928 929 default: 930 goto dropanyway; 931 } 932 break; 933 dropanyway: 934 #endif 935 default: 936 m_freem(m); 937 return; 938 } 939 #else /* ISO || LLC || NETATALK*/ 940 m_freem(m); 941 return; 942 #endif /* ISO || LLC || NETATALK*/ 943 } 944 945 if (IF_QFULL(inq)) { 946 IF_DROP(inq); 947 m_freem(m); 948 } else 949 IF_ENQUEUE(inq, m); 950 } 951 952 /* 953 * Convert Ethernet address to printable (loggable) representation. 954 */ 955 char * 956 ether_sprintf(const u_char *ap) 957 { 958 static char etherbuf[3 * ETHER_ADDR_LEN]; 959 return ether_snprintf(etherbuf, sizeof(etherbuf), ap); 960 } 961 962 char * 963 ether_snprintf(char *buf, size_t len, const u_char *ap) 964 { 965 char *cp = buf; 966 size_t i; 967 968 for (i = 0; i < len / 3; i++) { 969 *cp++ = hexdigits[*ap >> 4]; 970 *cp++ = hexdigits[*ap++ & 0xf]; 971 *cp++ = ':'; 972 } 973 *--cp = '\0'; 974 return buf; 975 } 976 977 /* 978 * Perform common duties while attaching to interface list 979 */ 980 void 981 ether_ifattach(struct ifnet *ifp, const uint8_t *lla) 982 { 983 struct ethercom *ec = (struct ethercom *)ifp; 984 985 ifp->if_type = IFT_ETHER; 986 ifp->if_hdrlen = ETHER_HDR_LEN; 987 ifp->if_dlt = DLT_EN10MB; 988 ifp->if_mtu = ETHERMTU; 989 ifp->if_output = ether_output; 990 ifp->if_input = ether_input; 991 if (ifp->if_baudrate == 0) 992 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 993 994 if_set_sadl(ifp, lla, ETHER_ADDR_LEN, !ETHER_IS_LOCAL(lla)); 995 996 LIST_INIT(&ec->ec_multiaddrs); 997 ifp->if_broadcastaddr = etherbroadcastaddr; 998 bpf_attach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 999 #ifdef MBUFTRACE 1000 strlcpy(ec->ec_tx_mowner.mo_name, ifp->if_xname, 1001 sizeof(ec->ec_tx_mowner.mo_name)); 1002 strlcpy(ec->ec_tx_mowner.mo_descr, "tx", 1003 sizeof(ec->ec_tx_mowner.mo_descr)); 1004 strlcpy(ec->ec_rx_mowner.mo_name, ifp->if_xname, 1005 sizeof(ec->ec_rx_mowner.mo_name)); 1006 strlcpy(ec->ec_rx_mowner.mo_descr, "rx", 1007 sizeof(ec->ec_rx_mowner.mo_descr)); 1008 MOWNER_ATTACH(&ec->ec_tx_mowner); 1009 MOWNER_ATTACH(&ec->ec_rx_mowner); 1010 ifp->if_mowner = &ec->ec_tx_mowner; 1011 #endif 1012 } 1013 1014 void 1015 ether_ifdetach(struct ifnet *ifp) 1016 { 1017 struct ethercom *ec = (void *) ifp; 1018 struct ether_multi *enm; 1019 int s; 1020 1021 /* 1022 * Prevent further calls to ioctl (for example turning off 1023 * promiscuous mode from the bridge code), which eventually can 1024 * call if_init() which can cause panics because the interface 1025 * is in the process of being detached. Return device not configured 1026 * instead. 1027 */ 1028 ifp->if_ioctl = (int (*)(struct ifnet *, u_long, void *))enxio; 1029 1030 #if NBRIDGE > 0 1031 if (ifp->if_bridge) 1032 bridge_ifdetach(ifp); 1033 #endif 1034 1035 bpf_detach(ifp); 1036 1037 #if NVLAN > 0 1038 if (ec->ec_nvlans) 1039 vlan_ifdetach(ifp); 1040 #endif 1041 1042 s = splnet(); 1043 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1044 LIST_REMOVE(enm, enm_list); 1045 free(enm, M_IFMADDR); 1046 ec->ec_multicnt--; 1047 } 1048 splx(s); 1049 1050 #if 0 /* done in if_detach() */ 1051 if_free_sadl(ifp); 1052 #endif 1053 1054 ifp->if_mowner = NULL; 1055 MOWNER_DETACH(&ec->ec_rx_mowner); 1056 MOWNER_DETACH(&ec->ec_tx_mowner); 1057 } 1058 1059 #if 0 1060 /* 1061 * This is for reference. We have a table-driven version 1062 * of the little-endian crc32 generator, which is faster 1063 * than the double-loop. 1064 */ 1065 uint32_t 1066 ether_crc32_le(const uint8_t *buf, size_t len) 1067 { 1068 uint32_t c, crc, carry; 1069 size_t i, j; 1070 1071 crc = 0xffffffffU; /* initial value */ 1072 1073 for (i = 0; i < len; i++) { 1074 c = buf[i]; 1075 for (j = 0; j < 8; j++) { 1076 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1077 crc >>= 1; 1078 c >>= 1; 1079 if (carry) 1080 crc = (crc ^ ETHER_CRC_POLY_LE); 1081 } 1082 } 1083 1084 return (crc); 1085 } 1086 #else 1087 uint32_t 1088 ether_crc32_le(const uint8_t *buf, size_t len) 1089 { 1090 static const uint32_t crctab[] = { 1091 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1092 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1093 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1094 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1095 }; 1096 uint32_t crc; 1097 size_t i; 1098 1099 crc = 0xffffffffU; /* initial value */ 1100 1101 for (i = 0; i < len; i++) { 1102 crc ^= buf[i]; 1103 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1104 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1105 } 1106 1107 return (crc); 1108 } 1109 #endif 1110 1111 uint32_t 1112 ether_crc32_be(const uint8_t *buf, size_t len) 1113 { 1114 uint32_t c, crc, carry; 1115 size_t i, j; 1116 1117 crc = 0xffffffffU; /* initial value */ 1118 1119 for (i = 0; i < len; i++) { 1120 c = buf[i]; 1121 for (j = 0; j < 8; j++) { 1122 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1123 crc <<= 1; 1124 c >>= 1; 1125 if (carry) 1126 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1127 } 1128 } 1129 1130 return (crc); 1131 } 1132 1133 #ifdef INET 1134 const uint8_t ether_ipmulticast_min[ETHER_ADDR_LEN] = 1135 { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1136 const uint8_t ether_ipmulticast_max[ETHER_ADDR_LEN] = 1137 { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1138 #endif 1139 #ifdef INET6 1140 const uint8_t ether_ip6multicast_min[ETHER_ADDR_LEN] = 1141 { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1142 const uint8_t ether_ip6multicast_max[ETHER_ADDR_LEN] = 1143 { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1144 #endif 1145 1146 /* 1147 * ether_aton implementation, not using a static buffer. 1148 */ 1149 int 1150 ether_aton_r(u_char *dest, size_t len, const char *str) 1151 { 1152 const u_char *cp = (const void *)str; 1153 u_char *ep; 1154 1155 #define atox(c) (((c) <= '9') ? ((c) - '0') : ((toupper(c) - 'A') + 10)) 1156 1157 if (len < ETHER_ADDR_LEN) 1158 return ENOSPC; 1159 1160 ep = dest + ETHER_ADDR_LEN; 1161 1162 while (*cp) { 1163 if (!isxdigit(*cp)) 1164 return EINVAL; 1165 *dest = atox(*cp); 1166 cp++; 1167 if (isxdigit(*cp)) { 1168 *dest = (*dest << 4) | atox(*cp); 1169 dest++; 1170 cp++; 1171 } else 1172 dest++; 1173 if (dest == ep) 1174 return *cp == '\0' ? 0 : ENAMETOOLONG; 1175 switch (*cp) { 1176 case ':': 1177 case '-': 1178 case '.': 1179 cp++; 1180 break; 1181 } 1182 } 1183 return ENOBUFS; 1184 } 1185 1186 /* 1187 * Convert a sockaddr into an Ethernet address or range of Ethernet 1188 * addresses. 1189 */ 1190 int 1191 ether_multiaddr(const struct sockaddr *sa, uint8_t addrlo[ETHER_ADDR_LEN], 1192 uint8_t addrhi[ETHER_ADDR_LEN]) 1193 { 1194 #ifdef INET 1195 const struct sockaddr_in *sin; 1196 #endif /* INET */ 1197 #ifdef INET6 1198 const struct sockaddr_in6 *sin6; 1199 #endif /* INET6 */ 1200 1201 switch (sa->sa_family) { 1202 1203 case AF_UNSPEC: 1204 memcpy(addrlo, sa->sa_data, ETHER_ADDR_LEN); 1205 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1206 break; 1207 1208 #ifdef INET 1209 case AF_INET: 1210 sin = satocsin(sa); 1211 if (sin->sin_addr.s_addr == INADDR_ANY) { 1212 /* 1213 * An IP address of INADDR_ANY means listen to 1214 * or stop listening to all of the Ethernet 1215 * multicast addresses used for IP. 1216 * (This is for the sake of IP multicast routers.) 1217 */ 1218 memcpy(addrlo, ether_ipmulticast_min, ETHER_ADDR_LEN); 1219 memcpy(addrhi, ether_ipmulticast_max, ETHER_ADDR_LEN); 1220 } 1221 else { 1222 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1223 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1224 } 1225 break; 1226 #endif 1227 #ifdef INET6 1228 case AF_INET6: 1229 sin6 = satocsin6(sa); 1230 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1231 /* 1232 * An IP6 address of 0 means listen to or stop 1233 * listening to all of the Ethernet multicast 1234 * address used for IP6. 1235 * (This is used for multicast routers.) 1236 */ 1237 memcpy(addrlo, ether_ip6multicast_min, ETHER_ADDR_LEN); 1238 memcpy(addrhi, ether_ip6multicast_max, ETHER_ADDR_LEN); 1239 } else { 1240 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1241 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1242 } 1243 break; 1244 #endif 1245 1246 default: 1247 return EAFNOSUPPORT; 1248 } 1249 return 0; 1250 } 1251 1252 /* 1253 * Add an Ethernet multicast address or range of addresses to the list for a 1254 * given interface. 1255 */ 1256 int 1257 ether_addmulti(const struct sockaddr *sa, struct ethercom *ec) 1258 { 1259 struct ether_multi *enm; 1260 u_char addrlo[ETHER_ADDR_LEN]; 1261 u_char addrhi[ETHER_ADDR_LEN]; 1262 int s = splnet(), error; 1263 1264 error = ether_multiaddr(sa, addrlo, addrhi); 1265 if (error != 0) { 1266 splx(s); 1267 return error; 1268 } 1269 1270 /* 1271 * Verify that we have valid Ethernet multicast addresses. 1272 */ 1273 if (!ETHER_IS_MULTICAST(addrlo) || !ETHER_IS_MULTICAST(addrhi)) { 1274 splx(s); 1275 return EINVAL; 1276 } 1277 /* 1278 * See if the address range is already in the list. 1279 */ 1280 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1281 if (enm != NULL) { 1282 /* 1283 * Found it; just increment the reference count. 1284 */ 1285 ++enm->enm_refcount; 1286 splx(s); 1287 return 0; 1288 } 1289 /* 1290 * New address or range; malloc a new multicast record 1291 * and link it into the interface's multicast list. 1292 */ 1293 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1294 if (enm == NULL) { 1295 splx(s); 1296 return ENOBUFS; 1297 } 1298 memcpy(enm->enm_addrlo, addrlo, 6); 1299 memcpy(enm->enm_addrhi, addrhi, 6); 1300 enm->enm_refcount = 1; 1301 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1302 ec->ec_multicnt++; 1303 splx(s); 1304 /* 1305 * Return ENETRESET to inform the driver that the list has changed 1306 * and its reception filter should be adjusted accordingly. 1307 */ 1308 return ENETRESET; 1309 } 1310 1311 /* 1312 * Delete a multicast address record. 1313 */ 1314 int 1315 ether_delmulti(const struct sockaddr *sa, struct ethercom *ec) 1316 { 1317 struct ether_multi *enm; 1318 u_char addrlo[ETHER_ADDR_LEN]; 1319 u_char addrhi[ETHER_ADDR_LEN]; 1320 int s = splnet(), error; 1321 1322 error = ether_multiaddr(sa, addrlo, addrhi); 1323 if (error != 0) { 1324 splx(s); 1325 return (error); 1326 } 1327 1328 /* 1329 * Look ur the address in our list. 1330 */ 1331 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1332 if (enm == NULL) { 1333 splx(s); 1334 return (ENXIO); 1335 } 1336 if (--enm->enm_refcount != 0) { 1337 /* 1338 * Still some claims to this record. 1339 */ 1340 splx(s); 1341 return (0); 1342 } 1343 /* 1344 * No remaining claims to this record; unlink and free it. 1345 */ 1346 LIST_REMOVE(enm, enm_list); 1347 free(enm, M_IFMADDR); 1348 ec->ec_multicnt--; 1349 splx(s); 1350 /* 1351 * Return ENETRESET to inform the driver that the list has changed 1352 * and its reception filter should be adjusted accordingly. 1353 */ 1354 return (ENETRESET); 1355 } 1356 1357 void 1358 ether_set_ifflags_cb(struct ethercom *ec, ether_cb_t cb) 1359 { 1360 ec->ec_ifflags_cb = cb; 1361 } 1362 1363 /* 1364 * Common ioctls for Ethernet interfaces. Note, we must be 1365 * called at splnet(). 1366 */ 1367 int 1368 ether_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1369 { 1370 struct ethercom *ec = (void *) ifp; 1371 struct eccapreq *eccr; 1372 struct ifreq *ifr = (struct ifreq *)data; 1373 struct if_laddrreq *iflr = data; 1374 const struct sockaddr_dl *sdl; 1375 static const uint8_t zero[ETHER_ADDR_LEN]; 1376 int error; 1377 1378 switch (cmd) { 1379 case SIOCINITIFADDR: 1380 { 1381 struct ifaddr *ifa = (struct ifaddr *)data; 1382 if (ifa->ifa_addr->sa_family != AF_LINK 1383 && (ifp->if_flags & (IFF_UP|IFF_RUNNING)) != 1384 (IFF_UP|IFF_RUNNING)) { 1385 ifp->if_flags |= IFF_UP; 1386 if ((error = (*ifp->if_init)(ifp)) != 0) 1387 return error; 1388 } 1389 #ifdef INET 1390 if (ifa->ifa_addr->sa_family == AF_INET) 1391 arp_ifinit(ifp, ifa); 1392 #endif /* INET */ 1393 return 0; 1394 } 1395 1396 case SIOCSIFMTU: 1397 { 1398 int maxmtu; 1399 1400 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1401 maxmtu = ETHERMTU_JUMBO; 1402 else 1403 maxmtu = ETHERMTU; 1404 1405 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1406 return EINVAL; 1407 else if ((error = ifioctl_common(ifp, cmd, data)) != ENETRESET) 1408 return error; 1409 else if (ifp->if_flags & IFF_UP) { 1410 /* Make sure the device notices the MTU change. */ 1411 return (*ifp->if_init)(ifp); 1412 } else 1413 return 0; 1414 } 1415 1416 case SIOCSIFFLAGS: 1417 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1418 return error; 1419 switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) { 1420 case IFF_RUNNING: 1421 /* 1422 * If interface is marked down and it is running, 1423 * then stop and disable it. 1424 */ 1425 (*ifp->if_stop)(ifp, 1); 1426 break; 1427 case IFF_UP: 1428 /* 1429 * If interface is marked up and it is stopped, then 1430 * start it. 1431 */ 1432 return (*ifp->if_init)(ifp); 1433 case IFF_UP|IFF_RUNNING: 1434 error = 0; 1435 if (ec->ec_ifflags_cb == NULL || 1436 (error = (*ec->ec_ifflags_cb)(ec)) == ENETRESET) { 1437 /* 1438 * Reset the interface to pick up 1439 * changes in any other flags that 1440 * affect the hardware state. 1441 */ 1442 return (*ifp->if_init)(ifp); 1443 } else 1444 return error; 1445 case 0: 1446 break; 1447 } 1448 return 0; 1449 case SIOCGETHERCAP: 1450 eccr = (struct eccapreq *)data; 1451 eccr->eccr_capabilities = ec->ec_capabilities; 1452 eccr->eccr_capenable = ec->ec_capenable; 1453 return 0; 1454 case SIOCADDMULTI: 1455 return ether_addmulti(ifreq_getaddr(cmd, ifr), ec); 1456 case SIOCDELMULTI: 1457 return ether_delmulti(ifreq_getaddr(cmd, ifr), ec); 1458 case SIOCSIFMEDIA: 1459 case SIOCGIFMEDIA: 1460 if (ec->ec_mii == NULL) 1461 return ENOTTY; 1462 return ifmedia_ioctl(ifp, ifr, &ec->ec_mii->mii_media, cmd); 1463 case SIOCALIFADDR: 1464 sdl = satocsdl(sstocsa(&iflr->addr)); 1465 if (sdl->sdl_family != AF_LINK) 1466 ; 1467 else if (ETHER_IS_MULTICAST(CLLADDR(sdl))) 1468 return EINVAL; 1469 else if (memcmp(zero, CLLADDR(sdl), sizeof(zero)) == 0) 1470 return EINVAL; 1471 /*FALLTHROUGH*/ 1472 default: 1473 return ifioctl_common(ifp, cmd, data); 1474 } 1475 return 0; 1476 } 1477
Indexes created Mon Sep 22 05:09:51 GMT 2025