if_ethersubr.c revision 1.247
1 /* $NetBSD: if_ethersubr.c,v 1.247 2017/11/22 04:27:57 msaitoh 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 1.247 2017/11/22 04:27:57 msaitoh Exp $"); 65 66 #ifdef _KERNEL_OPT 67 #include "opt_inet.h" 68 #include "opt_atalk.h" 69 #include "opt_mbuftrace.h" 70 #include "opt_mpls.h" 71 #include "opt_gateway.h" 72 #include "opt_pppoe.h" 73 #include "opt_net_mpsafe.h" 74 #endif 75 76 #include "vlan.h" 77 #include "pppoe.h" 78 #include "bridge.h" 79 #include "arp.h" 80 #include "agr.h" 81 82 #include <sys/sysctl.h> 83 #include <sys/mbuf.h> 84 #include <sys/mutex.h> 85 #include <sys/ioctl.h> 86 #include <sys/errno.h> 87 #include <sys/device.h> 88 #include <sys/rnd.h> 89 #include <sys/rndsource.h> 90 #include <sys/cpu.h> 91 #include <sys/kmem.h> 92 93 #include <net/if.h> 94 #include <net/netisr.h> 95 #include <net/route.h> 96 #include <net/if_llc.h> 97 #include <net/if_dl.h> 98 #include <net/if_types.h> 99 #include <net/pktqueue.h> 100 101 #include <net/if_media.h> 102 #include <dev/mii/mii.h> 103 #include <dev/mii/miivar.h> 104 105 #if NARP == 0 106 /* 107 * XXX there should really be a way to issue this warning from within config(8) 108 */ 109 #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. 110 #endif 111 112 #include <net/bpf.h> 113 114 #include <net/if_ether.h> 115 #include <net/if_vlanvar.h> 116 117 #if NPPPOE > 0 118 #include <net/if_pppoe.h> 119 #endif 120 121 #if NAGR > 0 122 #include <net/agr/ieee8023_slowprotocols.h> /* XXX */ 123 #include <net/agr/ieee8023ad.h> 124 #include <net/agr/if_agrvar.h> 125 #endif 126 127 #if NBRIDGE > 0 128 #include <net/if_bridgevar.h> 129 #endif 130 131 #include <netinet/in.h> 132 #ifdef INET 133 #include <netinet/in_var.h> 134 #endif 135 #include <netinet/if_inarp.h> 136 137 #ifdef INET6 138 #ifndef INET 139 #include <netinet/in.h> 140 #endif 141 #include <netinet6/in6_var.h> 142 #include <netinet6/nd6.h> 143 #endif 144 145 146 #include "carp.h" 147 #if NCARP > 0 148 #include <netinet/ip_carp.h> 149 #endif 150 151 #ifdef NETATALK 152 #include <netatalk/at.h> 153 #include <netatalk/at_var.h> 154 #include <netatalk/at_extern.h> 155 156 #define llc_snap_org_code llc_un.type_snap.org_code 157 #define llc_snap_ether_type llc_un.type_snap.ether_type 158 159 extern u_char at_org_code[3]; 160 extern u_char aarp_org_code[3]; 161 #endif /* NETATALK */ 162 163 #ifdef MPLS 164 #include <netmpls/mpls.h> 165 #include <netmpls/mpls_var.h> 166 #endif 167 168 static struct timeval bigpktppslim_last; 169 static int bigpktppslim = 2; /* XXX */ 170 static int bigpktpps_count; 171 static kmutex_t bigpktpps_lock __cacheline_aligned; 172 173 174 const uint8_t etherbroadcastaddr[ETHER_ADDR_LEN] = 175 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 176 const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] = 177 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 }; 178 #define senderr(e) { error = (e); goto bad;} 179 180 static int ether_output(struct ifnet *, struct mbuf *, 181 const struct sockaddr *, const struct rtentry *); 182 183 /* 184 * Ethernet output routine. 185 * Encapsulate a packet of type family for the local net. 186 * Assumes that ifp is actually pointer to ethercom structure. 187 */ 188 static int 189 ether_output(struct ifnet * const ifp0, struct mbuf * const m0, 190 const struct sockaddr * const dst, 191 const struct rtentry *rt) 192 { 193 uint16_t etype = 0; 194 int error = 0, hdrcmplt = 0; 195 uint8_t esrc[6], edst[6]; 196 struct mbuf *m = m0; 197 struct mbuf *mcopy = NULL; 198 struct ether_header *eh; 199 struct ifnet *ifp = ifp0; 200 #ifdef INET 201 struct arphdr *ah; 202 #endif /* INET */ 203 #ifdef NETATALK 204 struct at_ifaddr *aa; 205 #endif /* NETATALK */ 206 207 #ifdef MBUFTRACE 208 m_claimm(m, ifp->if_mowner); 209 #endif 210 211 #if NCARP > 0 212 if (ifp->if_type == IFT_CARP) { 213 struct ifaddr *ifa; 214 int s = pserialize_read_enter(); 215 216 /* loop back if this is going to the carp interface */ 217 if (dst != NULL && ifp0->if_link_state == LINK_STATE_UP && 218 (ifa = ifa_ifwithaddr(dst)) != NULL) { 219 if (ifa->ifa_ifp == ifp0) { 220 pserialize_read_exit(s); 221 return looutput(ifp0, m, dst, rt); 222 } 223 } 224 pserialize_read_exit(s); 225 226 ifp = ifp->if_carpdev; 227 /* ac = (struct arpcom *)ifp; */ 228 229 if ((ifp0->if_flags & (IFF_UP | IFF_RUNNING)) != 230 (IFF_UP | IFF_RUNNING)) 231 senderr(ENETDOWN); 232 } 233 #endif /* NCARP > 0 */ 234 235 if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) != (IFF_UP | IFF_RUNNING)) 236 senderr(ENETDOWN); 237 238 switch (dst->sa_family) { 239 240 #ifdef INET 241 case AF_INET: 242 if (m->m_flags & M_BCAST) 243 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 244 else if (m->m_flags & M_MCAST) 245 ETHER_MAP_IP_MULTICAST(&satocsin(dst)->sin_addr, edst); 246 else if ((error = arpresolve(ifp, rt, m, dst, edst, 247 sizeof(edst))) != 0) { 248 return error == EWOULDBLOCK ? 0 : error; 249 } 250 /* If broadcasting on a simplex interface, loopback a copy */ 251 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 252 mcopy = m_copy(m, 0, (int)M_COPYALL); 253 etype = htons(ETHERTYPE_IP); 254 break; 255 256 case AF_ARP: 257 ah = mtod(m, struct arphdr *); 258 if (m->m_flags & M_BCAST) 259 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 260 else { 261 void *tha = ar_tha(ah); 262 263 if (tha == NULL) { 264 /* fake with ARPHDR_IEEE1394 */ 265 m_freem(m); 266 return 0; 267 } 268 memcpy(edst, tha, sizeof(edst)); 269 } 270 271 ah->ar_hrd = htons(ARPHRD_ETHER); 272 273 switch (ntohs(ah->ar_op)) { 274 case ARPOP_REVREQUEST: 275 case ARPOP_REVREPLY: 276 etype = htons(ETHERTYPE_REVARP); 277 break; 278 279 case ARPOP_REQUEST: 280 case ARPOP_REPLY: 281 default: 282 etype = htons(ETHERTYPE_ARP); 283 } 284 285 break; 286 #endif 287 #ifdef INET6 288 case AF_INET6: 289 if (m->m_flags & M_BCAST) 290 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 291 else if (m->m_flags & M_MCAST) { 292 ETHER_MAP_IPV6_MULTICAST(&satocsin6(dst)->sin6_addr, 293 edst); 294 } else { 295 error = nd6_resolve(ifp, rt, m, dst, edst, 296 sizeof(edst)); 297 if (error != 0) 298 return error == EWOULDBLOCK ? 0 : error; 299 } 300 etype = htons(ETHERTYPE_IPV6); 301 break; 302 #endif 303 #ifdef NETATALK 304 case AF_APPLETALK: { 305 struct ifaddr *ifa; 306 int s; 307 308 KERNEL_LOCK(1, NULL); 309 if (!aarpresolve(ifp, m, (const struct sockaddr_at *)dst, edst)) { 310 #ifdef NETATALKDEBUG 311 printf("aarpresolv failed\n"); 312 #endif /* NETATALKDEBUG */ 313 KERNEL_UNLOCK_ONE(NULL); 314 return (0); 315 } 316 /* 317 * ifaddr is the first thing in at_ifaddr 318 */ 319 s = pserialize_read_enter(); 320 ifa = at_ifawithnet((const struct sockaddr_at *)dst, ifp); 321 if (ifa == NULL) { 322 pserialize_read_exit(s); 323 KERNEL_UNLOCK_ONE(NULL); 324 goto bad; 325 } 326 aa = (struct at_ifaddr *)ifa; 327 328 /* 329 * In the phase 2 case, we need to prepend an mbuf for the 330 * llc header. Since we must preserve the value of m, 331 * which is passed to us by value, we m_copy() the first 332 * mbuf, and use it for our llc header. 333 */ 334 if (aa->aa_flags & AFA_PHASE2) { 335 struct llc llc; 336 337 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 338 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 339 llc.llc_control = LLC_UI; 340 memcpy(llc.llc_snap_org_code, at_org_code, 341 sizeof(llc.llc_snap_org_code)); 342 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 343 memcpy(mtod(m, void *), &llc, sizeof(struct llc)); 344 } else { 345 etype = htons(ETHERTYPE_ATALK); 346 } 347 pserialize_read_exit(s); 348 KERNEL_UNLOCK_ONE(NULL); 349 break; 350 } 351 #endif /* NETATALK */ 352 case pseudo_AF_HDRCMPLT: 353 hdrcmplt = 1; 354 memcpy(esrc, 355 ((const struct ether_header *)dst->sa_data)->ether_shost, 356 sizeof(esrc)); 357 /* FALLTHROUGH */ 358 359 case AF_UNSPEC: 360 memcpy(edst, 361 ((const struct ether_header *)dst->sa_data)->ether_dhost, 362 sizeof(edst)); 363 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 364 etype = ((const struct ether_header *)dst->sa_data)->ether_type; 365 break; 366 367 default: 368 printf("%s: can't handle af%d\n", ifp->if_xname, 369 dst->sa_family); 370 senderr(EAFNOSUPPORT); 371 } 372 373 #ifdef MPLS 374 KERNEL_LOCK(1, NULL); 375 { 376 struct m_tag *mtag; 377 mtag = m_tag_find(m, PACKET_TAG_MPLS, NULL); 378 if (mtag != NULL) { 379 /* Having the tag itself indicates it's MPLS */ 380 etype = htons(ETHERTYPE_MPLS); 381 m_tag_delete(m, mtag); 382 } 383 } 384 KERNEL_UNLOCK_ONE(NULL); 385 #endif 386 387 if (mcopy) 388 (void)looutput(ifp, mcopy, dst, rt); 389 390 /* If no ether type is set, this must be a 802.2 formatted packet. 391 */ 392 if (etype == 0) 393 etype = htons(m->m_pkthdr.len); 394 /* 395 * Add local net header. If no space in first mbuf, 396 * allocate another. 397 */ 398 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 399 if (m == 0) 400 senderr(ENOBUFS); 401 eh = mtod(m, struct ether_header *); 402 /* Note: etype is already in network byte order. */ 403 (void)memcpy(&eh->ether_type, &etype, sizeof(eh->ether_type)); 404 memcpy(eh->ether_dhost, edst, sizeof(edst)); 405 if (hdrcmplt) 406 memcpy(eh->ether_shost, esrc, sizeof(eh->ether_shost)); 407 else 408 memcpy(eh->ether_shost, CLLADDR(ifp->if_sadl), 409 sizeof(eh->ether_shost)); 410 411 #if NCARP > 0 412 if (ifp0 != ifp && ifp0->if_type == IFT_CARP) { 413 memcpy(eh->ether_shost, CLLADDR(ifp0->if_sadl), 414 sizeof(eh->ether_shost)); 415 } 416 #endif /* NCARP > 0 */ 417 418 if ((error = pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 419 return (error); 420 if (m == NULL) 421 return (0); 422 423 #if NBRIDGE > 0 424 /* 425 * Bridges require special output handling. 426 */ 427 if (ifp->if_bridge) 428 return (bridge_output(ifp, m, NULL, NULL)); 429 #endif 430 431 #if NCARP > 0 432 if (ifp != ifp0) 433 ifp0->if_obytes += m->m_pkthdr.len + ETHER_HDR_LEN; 434 #endif /* NCARP > 0 */ 435 436 #ifdef ALTQ 437 KERNEL_LOCK(1, NULL); 438 /* 439 * If ALTQ is enabled on the parent interface, do 440 * classification; the queueing discipline might not 441 * require classification, but might require the 442 * address family/header pointer in the pktattr. 443 */ 444 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 445 altq_etherclassify(&ifp->if_snd, m); 446 KERNEL_UNLOCK_ONE(NULL); 447 #endif 448 return ifq_enqueue(ifp, m); 449 450 bad: 451 if (m) 452 m_freem(m); 453 return (error); 454 } 455 456 #ifdef ALTQ 457 /* 458 * This routine is a slight hack to allow a packet to be classified 459 * if the Ethernet headers are present. It will go away when ALTQ's 460 * classification engine understands link headers. 461 */ 462 void 463 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m) 464 { 465 struct ether_header *eh; 466 uint16_t ether_type; 467 int hlen, af, hdrsize; 468 void *hdr; 469 470 hlen = ETHER_HDR_LEN; 471 eh = mtod(m, struct ether_header *); 472 473 ether_type = htons(eh->ether_type); 474 475 if (ether_type < ETHERMTU) { 476 /* LLC/SNAP */ 477 struct llc *llc = (struct llc *)(eh + 1); 478 hlen += 8; 479 480 if (m->m_len < hlen || 481 llc->llc_dsap != LLC_SNAP_LSAP || 482 llc->llc_ssap != LLC_SNAP_LSAP || 483 llc->llc_control != LLC_UI) { 484 /* Not SNAP. */ 485 goto bad; 486 } 487 488 ether_type = htons(llc->llc_un.type_snap.ether_type); 489 } 490 491 switch (ether_type) { 492 case ETHERTYPE_IP: 493 af = AF_INET; 494 hdrsize = 20; /* sizeof(struct ip) */ 495 break; 496 497 case ETHERTYPE_IPV6: 498 af = AF_INET6; 499 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 500 break; 501 502 default: 503 af = AF_UNSPEC; 504 hdrsize = 0; 505 break; 506 } 507 508 while (m->m_len <= hlen) { 509 hlen -= m->m_len; 510 m = m->m_next; 511 } 512 if (m->m_len < (hlen + hdrsize)) { 513 /* 514 * protocol header not in a single mbuf. 515 * We can't cope with this situation right 516 * now (but it shouldn't ever happen, really, anyhow). 517 */ 518 #ifdef DEBUG 519 printf("altq_etherclassify: headers span multiple mbufs: " 520 "%d < %d\n", m->m_len, (hlen + hdrsize)); 521 #endif 522 goto bad; 523 } 524 525 m->m_data += hlen; 526 m->m_len -= hlen; 527 528 hdr = mtod(m, void *); 529 530 if (ALTQ_NEEDS_CLASSIFY(ifq)) 531 m->m_pkthdr.pattr_class = 532 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 533 m->m_pkthdr.pattr_af = af; 534 m->m_pkthdr.pattr_hdr = hdr; 535 536 m->m_data -= hlen; 537 m->m_len += hlen; 538 539 return; 540 541 bad: 542 m->m_pkthdr.pattr_class = NULL; 543 m->m_pkthdr.pattr_hdr = NULL; 544 m->m_pkthdr.pattr_af = AF_UNSPEC; 545 } 546 #endif /* ALTQ */ 547 548 /* 549 * Process a received Ethernet packet; 550 * the packet is in the mbuf chain m with 551 * the ether header. 552 */ 553 void 554 ether_input(struct ifnet *ifp, struct mbuf *m) 555 { 556 struct ethercom *ec = (struct ethercom *) ifp; 557 pktqueue_t *pktq = NULL; 558 struct ifqueue *inq = NULL; 559 uint16_t etype; 560 struct ether_header *eh; 561 size_t ehlen; 562 static int earlypkts; 563 int isr = 0; 564 #if defined (LLC) || defined(NETATALK) 565 struct llc *l; 566 #endif 567 568 KASSERT(!cpu_intr_p()); 569 570 if ((ifp->if_flags & IFF_UP) == 0) { 571 m_freem(m); 572 return; 573 } 574 575 #ifdef MBUFTRACE 576 m_claimm(m, &ec->ec_rx_mowner); 577 #endif 578 eh = mtod(m, struct ether_header *); 579 etype = ntohs(eh->ether_type); 580 ehlen = sizeof(*eh); 581 582 if(__predict_false(earlypkts < 100 || !rnd_initial_entropy)) { 583 rnd_add_data(NULL, eh, ehlen, 0); 584 earlypkts++; 585 } 586 587 /* 588 * Determine if the packet is within its size limits. 589 */ 590 if (etype != ETHERTYPE_MPLS && m->m_pkthdr.len > 591 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 592 mutex_enter(&bigpktpps_lock); 593 if (ppsratecheck(&bigpktppslim_last, &bigpktpps_count, 594 bigpktppslim)) { 595 printf("%s: discarding oversize frame (len=%d)\n", 596 ifp->if_xname, m->m_pkthdr.len); 597 } 598 mutex_exit(&bigpktpps_lock); 599 m_freem(m); 600 return; 601 } 602 603 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 604 /* 605 * If this is not a simplex interface, drop the packet 606 * if it came from us. 607 */ 608 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 609 memcmp(CLLADDR(ifp->if_sadl), eh->ether_shost, 610 ETHER_ADDR_LEN) == 0) { 611 m_freem(m); 612 return; 613 } 614 615 if (memcmp(etherbroadcastaddr, 616 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 617 m->m_flags |= M_BCAST; 618 else 619 m->m_flags |= M_MCAST; 620 ifp->if_imcasts++; 621 } 622 623 /* If the CRC is still on the packet, trim it off. */ 624 if (m->m_flags & M_HASFCS) { 625 m_adj(m, -ETHER_CRC_LEN); 626 m->m_flags &= ~M_HASFCS; 627 } 628 629 ifp->if_ibytes += m->m_pkthdr.len; 630 631 #if NCARP > 0 632 if (__predict_false(ifp->if_carp && ifp->if_type != IFT_CARP)) { 633 /* 634 * clear M_PROMISC, in case the packets comes from a 635 * vlan 636 */ 637 m->m_flags &= ~M_PROMISC; 638 if (carp_input(m, (uint8_t *)&eh->ether_shost, 639 (uint8_t *)&eh->ether_dhost, eh->ether_type) == 0) 640 return; 641 } 642 #endif /* NCARP > 0 */ 643 if ((m->m_flags & (M_BCAST | M_MCAST | M_PROMISC)) == 0 && 644 (ifp->if_flags & IFF_PROMISC) != 0 && 645 memcmp(CLLADDR(ifp->if_sadl), eh->ether_dhost, 646 ETHER_ADDR_LEN) != 0) { 647 m->m_flags |= M_PROMISC; 648 } 649 650 if ((m->m_flags & M_PROMISC) == 0) { 651 if (pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 652 return; 653 if (m == NULL) 654 return; 655 656 eh = mtod(m, struct ether_header *); 657 etype = ntohs(eh->ether_type); 658 ehlen = sizeof(*eh); 659 } 660 661 #if NAGR > 0 662 if (ifp->if_agrprivate && 663 __predict_true(etype != ETHERTYPE_SLOWPROTOCOLS)) { 664 m->m_flags &= ~M_PROMISC; 665 agr_input(ifp, m); 666 return; 667 } 668 #endif /* NAGR > 0 */ 669 670 /* 671 * If VLANs are configured on the interface, check to 672 * see if the device performed the decapsulation and 673 * provided us with the tag. 674 */ 675 if (ec->ec_nvlans && vlan_has_tag(m)) { 676 #if NVLAN > 0 677 /* 678 * vlan_input() will either recursively call ether_input() 679 * or drop the packet. 680 */ 681 vlan_input(ifp, m); 682 #else 683 m_freem(m); 684 #endif 685 return; 686 } 687 688 /* 689 * Handle protocols that expect to have the Ethernet header 690 * (and possibly FCS) intact. 691 */ 692 switch (etype) { 693 case ETHERTYPE_VLAN: { 694 struct ether_vlan_header *evl = (void *)eh; 695 /* 696 * If there is a tag of 0, then the VLAN header was probably 697 * just being used to store the priority. Extract the ether 698 * type, and if IP or IPV6, let them deal with it. 699 */ 700 if (m->m_len <= sizeof(*evl) 701 && EVL_VLANOFTAG(evl->evl_tag) == 0) { 702 etype = ntohs(evl->evl_proto); 703 ehlen = sizeof(*evl); 704 if ((m->m_flags & M_PROMISC) == 0 705 && (etype == ETHERTYPE_IP 706 || etype == ETHERTYPE_IPV6)) 707 break; 708 } 709 #if NVLAN > 0 710 /* 711 * vlan_input() will either recursively call ether_input() 712 * or drop the packet. 713 */ 714 if (((struct ethercom *)ifp)->ec_nvlans != 0) 715 vlan_input(ifp, m); 716 else 717 #endif /* NVLAN > 0 */ 718 m_freem(m); 719 return; 720 } 721 #if NPPPOE > 0 722 case ETHERTYPE_PPPOEDISC: 723 pppoedisc_input(ifp, m); 724 return; 725 case ETHERTYPE_PPPOE: 726 pppoe_input(ifp, m); 727 return; 728 #endif /* NPPPOE > 0 */ 729 case ETHERTYPE_SLOWPROTOCOLS: { 730 uint8_t subtype; 731 732 #if defined(DIAGNOSTIC) 733 if (m->m_pkthdr.len < sizeof(*eh) + sizeof(subtype)) { 734 panic("ether_input: too short slow protocol packet"); 735 } 736 #endif 737 m_copydata(m, sizeof(*eh), sizeof(subtype), &subtype); 738 switch (subtype) { 739 #if NAGR > 0 740 case SLOWPROTOCOLS_SUBTYPE_LACP: 741 if (ifp->if_agrprivate) { 742 ieee8023ad_lacp_input(ifp, m); 743 return; 744 } 745 break; 746 747 case SLOWPROTOCOLS_SUBTYPE_MARKER: 748 if (ifp->if_agrprivate) { 749 ieee8023ad_marker_input(ifp, m); 750 return; 751 } 752 break; 753 #endif /* NAGR > 0 */ 754 default: 755 if (subtype == 0 || subtype > 10) { 756 /* illegal value */ 757 m_freem(m); 758 return; 759 } 760 /* unknown subtype */ 761 break; 762 } 763 /* FALLTHROUGH */ 764 } 765 default: 766 if (m->m_flags & M_PROMISC) { 767 m_freem(m); 768 return; 769 } 770 } 771 772 /* If the CRC is still on the packet, trim it off. */ 773 if (m->m_flags & M_HASFCS) { 774 m_adj(m, -ETHER_CRC_LEN); 775 m->m_flags &= ~M_HASFCS; 776 } 777 778 if (etype > ETHERMTU + sizeof (struct ether_header)) { 779 /* Strip off the Ethernet header. */ 780 m_adj(m, ehlen); 781 782 switch (etype) { 783 #ifdef INET 784 case ETHERTYPE_IP: 785 #ifdef GATEWAY 786 if (ipflow_fastforward(m)) 787 return; 788 #endif 789 pktq = ip_pktq; 790 break; 791 792 case ETHERTYPE_ARP: 793 isr = NETISR_ARP; 794 inq = &arpintrq; 795 break; 796 797 case ETHERTYPE_REVARP: 798 revarpinput(m); /* XXX queue? */ 799 return; 800 #endif 801 #ifdef INET6 802 case ETHERTYPE_IPV6: 803 if (__predict_false(!in6_present)) { 804 m_freem(m); 805 return; 806 } 807 #ifdef GATEWAY 808 if (ip6flow_fastforward(&m)) 809 return; 810 #endif 811 pktq = ip6_pktq; 812 break; 813 #endif 814 #ifdef NETATALK 815 case ETHERTYPE_ATALK: 816 isr = NETISR_ATALK; 817 inq = &atintrq1; 818 break; 819 case ETHERTYPE_AARP: 820 /* probably this should be done with a NETISR as well */ 821 aarpinput(ifp, m); /* XXX */ 822 return; 823 #endif /* NETATALK */ 824 #ifdef MPLS 825 case ETHERTYPE_MPLS: 826 isr = NETISR_MPLS; 827 inq = &mplsintrq; 828 break; 829 #endif 830 default: 831 m_freem(m); 832 return; 833 } 834 } else { 835 #if defined (LLC) || defined (NETATALK) 836 l = (struct llc *)(eh+1); 837 switch (l->llc_dsap) { 838 #ifdef NETATALK 839 case LLC_SNAP_LSAP: 840 switch (l->llc_control) { 841 case LLC_UI: 842 if (l->llc_ssap != LLC_SNAP_LSAP) { 843 goto dropanyway; 844 } 845 846 if (memcmp(&(l->llc_snap_org_code)[0], 847 at_org_code, sizeof(at_org_code)) == 0 && 848 ntohs(l->llc_snap_ether_type) == 849 ETHERTYPE_ATALK) { 850 inq = &atintrq2; 851 m_adj(m, sizeof(struct ether_header) 852 + sizeof(struct llc)); 853 isr = NETISR_ATALK; 854 break; 855 } 856 857 if (memcmp(&(l->llc_snap_org_code)[0], 858 aarp_org_code, 859 sizeof(aarp_org_code)) == 0 && 860 ntohs(l->llc_snap_ether_type) == 861 ETHERTYPE_AARP) { 862 m_adj( m, sizeof(struct ether_header) 863 + sizeof(struct llc)); 864 aarpinput(ifp, m); /* XXX */ 865 return; 866 } 867 868 default: 869 goto dropanyway; 870 } 871 break; 872 dropanyway: 873 #endif 874 default: 875 m_freem(m); 876 return; 877 } 878 #else /* ISO || LLC || NETATALK*/ 879 m_freem(m); 880 return; 881 #endif /* ISO || LLC || NETATALK*/ 882 } 883 884 if (__predict_true(pktq)) { 885 #ifdef NET_MPSAFE 886 const u_int h = curcpu()->ci_index; 887 #else 888 const uint32_t h = pktq_rps_hash(m); 889 #endif 890 if (__predict_false(!pktq_enqueue(pktq, m, h))) { 891 m_freem(m); 892 } 893 return; 894 } 895 896 if (__predict_false(!inq)) { 897 /* Should not happen. */ 898 m_freem(m); 899 return; 900 } 901 902 IFQ_LOCK(inq); 903 if (IF_QFULL(inq)) { 904 IF_DROP(inq); 905 IFQ_UNLOCK(inq); 906 m_freem(m); 907 } else { 908 IF_ENQUEUE(inq, m); 909 IFQ_UNLOCK(inq); 910 schednetisr(isr); 911 } 912 } 913 914 /* 915 * Convert Ethernet address to printable (loggable) representation. 916 */ 917 char * 918 ether_sprintf(const u_char *ap) 919 { 920 static char etherbuf[3 * ETHER_ADDR_LEN]; 921 return ether_snprintf(etherbuf, sizeof(etherbuf), ap); 922 } 923 924 char * 925 ether_snprintf(char *buf, size_t len, const u_char *ap) 926 { 927 char *cp = buf; 928 size_t i; 929 930 for (i = 0; i < len / 3; i++) { 931 *cp++ = hexdigits[*ap >> 4]; 932 *cp++ = hexdigits[*ap++ & 0xf]; 933 *cp++ = ':'; 934 } 935 *--cp = '\0'; 936 return buf; 937 } 938 939 /* 940 * Perform common duties while attaching to interface list 941 */ 942 void 943 ether_ifattach(struct ifnet *ifp, const uint8_t *lla) 944 { 945 struct ethercom *ec = (struct ethercom *)ifp; 946 947 ifp->if_type = IFT_ETHER; 948 ifp->if_hdrlen = ETHER_HDR_LEN; 949 ifp->if_dlt = DLT_EN10MB; 950 ifp->if_mtu = ETHERMTU; 951 ifp->if_output = ether_output; 952 ifp->_if_input = ether_input; 953 if (ifp->if_baudrate == 0) 954 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 955 956 if (lla != NULL) 957 if_set_sadl(ifp, lla, ETHER_ADDR_LEN, !ETHER_IS_LOCAL(lla)); 958 959 LIST_INIT(&ec->ec_multiaddrs); 960 ec->ec_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_NET); 961 ifp->if_broadcastaddr = etherbroadcastaddr; 962 bpf_attach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 963 #ifdef MBUFTRACE 964 strlcpy(ec->ec_tx_mowner.mo_name, ifp->if_xname, 965 sizeof(ec->ec_tx_mowner.mo_name)); 966 strlcpy(ec->ec_tx_mowner.mo_descr, "tx", 967 sizeof(ec->ec_tx_mowner.mo_descr)); 968 strlcpy(ec->ec_rx_mowner.mo_name, ifp->if_xname, 969 sizeof(ec->ec_rx_mowner.mo_name)); 970 strlcpy(ec->ec_rx_mowner.mo_descr, "rx", 971 sizeof(ec->ec_rx_mowner.mo_descr)); 972 MOWNER_ATTACH(&ec->ec_tx_mowner); 973 MOWNER_ATTACH(&ec->ec_rx_mowner); 974 ifp->if_mowner = &ec->ec_tx_mowner; 975 #endif 976 } 977 978 void 979 ether_ifdetach(struct ifnet *ifp) 980 { 981 struct ethercom *ec = (void *) ifp; 982 struct ether_multi *enm; 983 984 /* 985 * Prevent further calls to ioctl (for example turning off 986 * promiscuous mode from the bridge code), which eventually can 987 * call if_init() which can cause panics because the interface 988 * is in the process of being detached. Return device not configured 989 * instead. 990 */ 991 ifp->if_ioctl = (int (*)(struct ifnet *, u_long, void *))enxio; 992 993 #if NBRIDGE > 0 994 if (ifp->if_bridge) 995 bridge_ifdetach(ifp); 996 #endif 997 998 bpf_detach(ifp); 999 1000 #if NVLAN > 0 1001 if (ec->ec_nvlans) 1002 vlan_ifdetach(ifp); 1003 #endif 1004 1005 ETHER_LOCK(ec); 1006 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1007 LIST_REMOVE(enm, enm_list); 1008 kmem_intr_free(enm, sizeof(*enm)); 1009 ec->ec_multicnt--; 1010 } 1011 ETHER_UNLOCK(ec); 1012 1013 mutex_destroy(ec->ec_lock); 1014 1015 ifp->if_mowner = NULL; 1016 MOWNER_DETACH(&ec->ec_rx_mowner); 1017 MOWNER_DETACH(&ec->ec_tx_mowner); 1018 } 1019 1020 #if 0 1021 /* 1022 * This is for reference. We have a table-driven version 1023 * of the little-endian crc32 generator, which is faster 1024 * than the double-loop. 1025 */ 1026 uint32_t 1027 ether_crc32_le(const uint8_t *buf, size_t len) 1028 { 1029 uint32_t c, crc, carry; 1030 size_t i, j; 1031 1032 crc = 0xffffffffU; /* initial value */ 1033 1034 for (i = 0; i < len; i++) { 1035 c = buf[i]; 1036 for (j = 0; j < 8; j++) { 1037 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1038 crc >>= 1; 1039 c >>= 1; 1040 if (carry) 1041 crc = (crc ^ ETHER_CRC_POLY_LE); 1042 } 1043 } 1044 1045 return (crc); 1046 } 1047 #else 1048 uint32_t 1049 ether_crc32_le(const uint8_t *buf, size_t len) 1050 { 1051 static const uint32_t crctab[] = { 1052 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1053 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1054 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1055 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1056 }; 1057 uint32_t crc; 1058 size_t i; 1059 1060 crc = 0xffffffffU; /* initial value */ 1061 1062 for (i = 0; i < len; i++) { 1063 crc ^= buf[i]; 1064 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1065 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1066 } 1067 1068 return (crc); 1069 } 1070 #endif 1071 1072 uint32_t 1073 ether_crc32_be(const uint8_t *buf, size_t len) 1074 { 1075 uint32_t c, crc, carry; 1076 size_t i, j; 1077 1078 crc = 0xffffffffU; /* initial value */ 1079 1080 for (i = 0; i < len; i++) { 1081 c = buf[i]; 1082 for (j = 0; j < 8; j++) { 1083 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1084 crc <<= 1; 1085 c >>= 1; 1086 if (carry) 1087 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1088 } 1089 } 1090 1091 return (crc); 1092 } 1093 1094 #ifdef INET 1095 const uint8_t ether_ipmulticast_min[ETHER_ADDR_LEN] = 1096 { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1097 const uint8_t ether_ipmulticast_max[ETHER_ADDR_LEN] = 1098 { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1099 #endif 1100 #ifdef INET6 1101 const uint8_t ether_ip6multicast_min[ETHER_ADDR_LEN] = 1102 { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1103 const uint8_t ether_ip6multicast_max[ETHER_ADDR_LEN] = 1104 { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1105 #endif 1106 1107 /* 1108 * ether_aton implementation, not using a static buffer. 1109 */ 1110 int 1111 ether_aton_r(u_char *dest, size_t len, const char *str) 1112 { 1113 const u_char *cp = (const void *)str; 1114 u_char *ep; 1115 1116 #define atox(c) (((c) <= '9') ? ((c) - '0') : ((toupper(c) - 'A') + 10)) 1117 1118 if (len < ETHER_ADDR_LEN) 1119 return ENOSPC; 1120 1121 ep = dest + ETHER_ADDR_LEN; 1122 1123 while (*cp) { 1124 if (!isxdigit(*cp)) 1125 return EINVAL; 1126 *dest = atox(*cp); 1127 cp++; 1128 if (isxdigit(*cp)) { 1129 *dest = (*dest << 4) | atox(*cp); 1130 dest++; 1131 cp++; 1132 } else 1133 dest++; 1134 if (dest == ep) 1135 return *cp == '\0' ? 0 : ENAMETOOLONG; 1136 switch (*cp) { 1137 case ':': 1138 case '-': 1139 case '.': 1140 cp++; 1141 break; 1142 } 1143 } 1144 return ENOBUFS; 1145 } 1146 1147 /* 1148 * Convert a sockaddr into an Ethernet address or range of Ethernet 1149 * addresses. 1150 */ 1151 int 1152 ether_multiaddr(const struct sockaddr *sa, uint8_t addrlo[ETHER_ADDR_LEN], 1153 uint8_t addrhi[ETHER_ADDR_LEN]) 1154 { 1155 #ifdef INET 1156 const struct sockaddr_in *sin; 1157 #endif /* INET */ 1158 #ifdef INET6 1159 const struct sockaddr_in6 *sin6; 1160 #endif /* INET6 */ 1161 1162 switch (sa->sa_family) { 1163 1164 case AF_UNSPEC: 1165 memcpy(addrlo, sa->sa_data, ETHER_ADDR_LEN); 1166 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1167 break; 1168 1169 #ifdef INET 1170 case AF_INET: 1171 sin = satocsin(sa); 1172 if (sin->sin_addr.s_addr == INADDR_ANY) { 1173 /* 1174 * An IP address of INADDR_ANY means listen to 1175 * or stop listening to all of the Ethernet 1176 * multicast addresses used for IP. 1177 * (This is for the sake of IP multicast routers.) 1178 */ 1179 memcpy(addrlo, ether_ipmulticast_min, ETHER_ADDR_LEN); 1180 memcpy(addrhi, ether_ipmulticast_max, ETHER_ADDR_LEN); 1181 } 1182 else { 1183 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1184 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1185 } 1186 break; 1187 #endif 1188 #ifdef INET6 1189 case AF_INET6: 1190 sin6 = satocsin6(sa); 1191 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1192 /* 1193 * An IP6 address of 0 means listen to or stop 1194 * listening to all of the Ethernet multicast 1195 * address used for IP6. 1196 * (This is used for multicast routers.) 1197 */ 1198 memcpy(addrlo, ether_ip6multicast_min, ETHER_ADDR_LEN); 1199 memcpy(addrhi, ether_ip6multicast_max, ETHER_ADDR_LEN); 1200 } else { 1201 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1202 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1203 } 1204 break; 1205 #endif 1206 1207 default: 1208 return EAFNOSUPPORT; 1209 } 1210 return 0; 1211 } 1212 1213 /* 1214 * Add an Ethernet multicast address or range of addresses to the list for a 1215 * given interface. 1216 */ 1217 int 1218 ether_addmulti(const struct sockaddr *sa, struct ethercom *ec) 1219 { 1220 struct ether_multi *enm, *_enm; 1221 u_char addrlo[ETHER_ADDR_LEN]; 1222 u_char addrhi[ETHER_ADDR_LEN]; 1223 int error = 0; 1224 1225 /* Allocate out of lock */ 1226 /* XXX still can be called in softint */ 1227 enm = kmem_intr_alloc(sizeof(*enm), KM_SLEEP); 1228 if (enm == NULL) 1229 return ENOBUFS; 1230 1231 ETHER_LOCK(ec); 1232 error = ether_multiaddr(sa, addrlo, addrhi); 1233 if (error != 0) 1234 goto out; 1235 1236 /* 1237 * Verify that we have valid Ethernet multicast addresses. 1238 */ 1239 if (!ETHER_IS_MULTICAST(addrlo) || !ETHER_IS_MULTICAST(addrhi)) { 1240 error = EINVAL; 1241 goto out; 1242 } 1243 /* 1244 * See if the address range is already in the list. 1245 */ 1246 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, _enm); 1247 if (_enm != NULL) { 1248 /* 1249 * Found it; just increment the reference count. 1250 */ 1251 ++_enm->enm_refcount; 1252 error = 0; 1253 goto out; 1254 } 1255 /* 1256 * Link a new multicast record into the interface's multicast list. 1257 */ 1258 memcpy(enm->enm_addrlo, addrlo, 6); 1259 memcpy(enm->enm_addrhi, addrhi, 6); 1260 enm->enm_refcount = 1; 1261 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1262 ec->ec_multicnt++; 1263 /* 1264 * Return ENETRESET to inform the driver that the list has changed 1265 * and its reception filter should be adjusted accordingly. 1266 */ 1267 error = ENETRESET; 1268 enm = NULL; 1269 out: 1270 ETHER_UNLOCK(ec); 1271 if (enm != NULL) 1272 kmem_intr_free(enm, sizeof(*enm)); 1273 return error; 1274 } 1275 1276 /* 1277 * Delete a multicast address record. 1278 */ 1279 int 1280 ether_delmulti(const struct sockaddr *sa, struct ethercom *ec) 1281 { 1282 struct ether_multi *enm; 1283 u_char addrlo[ETHER_ADDR_LEN]; 1284 u_char addrhi[ETHER_ADDR_LEN]; 1285 int error; 1286 1287 ETHER_LOCK(ec); 1288 error = ether_multiaddr(sa, addrlo, addrhi); 1289 if (error != 0) 1290 goto error; 1291 1292 /* 1293 * Look ur the address in our list. 1294 */ 1295 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1296 if (enm == NULL) { 1297 error = ENXIO; 1298 goto error; 1299 } 1300 if (--enm->enm_refcount != 0) { 1301 /* 1302 * Still some claims to this record. 1303 */ 1304 error = 0; 1305 goto error; 1306 } 1307 /* 1308 * No remaining claims to this record; unlink and free it. 1309 */ 1310 LIST_REMOVE(enm, enm_list); 1311 ec->ec_multicnt--; 1312 ETHER_UNLOCK(ec); 1313 1314 kmem_intr_free(enm, sizeof(*enm)); 1315 /* 1316 * Return ENETRESET to inform the driver that the list has changed 1317 * and its reception filter should be adjusted accordingly. 1318 */ 1319 return ENETRESET; 1320 error: 1321 ETHER_UNLOCK(ec); 1322 return error; 1323 } 1324 1325 void 1326 ether_set_ifflags_cb(struct ethercom *ec, ether_cb_t cb) 1327 { 1328 ec->ec_ifflags_cb = cb; 1329 } 1330 1331 /* 1332 * Common ioctls for Ethernet interfaces. Note, we must be 1333 * called at splnet(). 1334 */ 1335 int 1336 ether_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1337 { 1338 struct ethercom *ec = (void *) ifp; 1339 struct eccapreq *eccr; 1340 struct ifreq *ifr = (struct ifreq *)data; 1341 struct if_laddrreq *iflr = data; 1342 const struct sockaddr_dl *sdl; 1343 static const uint8_t zero[ETHER_ADDR_LEN]; 1344 int error; 1345 1346 switch (cmd) { 1347 case SIOCINITIFADDR: 1348 { 1349 struct ifaddr *ifa = (struct ifaddr *)data; 1350 if (ifa->ifa_addr->sa_family != AF_LINK 1351 && (ifp->if_flags & (IFF_UP | IFF_RUNNING)) != 1352 (IFF_UP | IFF_RUNNING)) { 1353 ifp->if_flags |= IFF_UP; 1354 if ((error = (*ifp->if_init)(ifp)) != 0) 1355 return error; 1356 } 1357 #ifdef INET 1358 if (ifa->ifa_addr->sa_family == AF_INET) 1359 arp_ifinit(ifp, ifa); 1360 #endif /* INET */ 1361 return 0; 1362 } 1363 1364 case SIOCSIFMTU: 1365 { 1366 int maxmtu; 1367 1368 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1369 maxmtu = ETHERMTU_JUMBO; 1370 else 1371 maxmtu = ETHERMTU; 1372 1373 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1374 return EINVAL; 1375 else if ((error = ifioctl_common(ifp, cmd, data)) != ENETRESET) 1376 return error; 1377 else if (ifp->if_flags & IFF_UP) { 1378 /* Make sure the device notices the MTU change. */ 1379 return (*ifp->if_init)(ifp); 1380 } else 1381 return 0; 1382 } 1383 1384 case SIOCSIFFLAGS: 1385 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1386 return error; 1387 switch (ifp->if_flags & (IFF_UP | IFF_RUNNING)) { 1388 case IFF_RUNNING: 1389 /* 1390 * If interface is marked down and it is running, 1391 * then stop and disable it. 1392 */ 1393 (*ifp->if_stop)(ifp, 1); 1394 break; 1395 case IFF_UP: 1396 /* 1397 * If interface is marked up and it is stopped, then 1398 * start it. 1399 */ 1400 return (*ifp->if_init)(ifp); 1401 case IFF_UP | IFF_RUNNING: 1402 error = 0; 1403 if (ec->ec_ifflags_cb != NULL) { 1404 error = (*ec->ec_ifflags_cb)(ec); 1405 if (error == ENETRESET) { 1406 /* 1407 * Reset the interface to pick up 1408 * changes in any other flags that 1409 * affect the hardware state. 1410 */ 1411 return (*ifp->if_init)(ifp); 1412 } 1413 } else 1414 error = (*ifp->if_init)(ifp); 1415 return error; 1416 case 0: 1417 break; 1418 } 1419 return 0; 1420 case SIOCGETHERCAP: 1421 eccr = (struct eccapreq *)data; 1422 eccr->eccr_capabilities = ec->ec_capabilities; 1423 eccr->eccr_capenable = ec->ec_capenable; 1424 return 0; 1425 case SIOCADDMULTI: 1426 return ether_addmulti(ifreq_getaddr(cmd, ifr), ec); 1427 case SIOCDELMULTI: 1428 return ether_delmulti(ifreq_getaddr(cmd, ifr), ec); 1429 case SIOCSIFMEDIA: 1430 case SIOCGIFMEDIA: 1431 if (ec->ec_mii == NULL) 1432 return ENOTTY; 1433 return ifmedia_ioctl(ifp, ifr, &ec->ec_mii->mii_media, cmd); 1434 case SIOCALIFADDR: 1435 sdl = satocsdl(sstocsa(&iflr->addr)); 1436 if (sdl->sdl_family != AF_LINK) 1437 ; 1438 else if (ETHER_IS_MULTICAST(CLLADDR(sdl))) 1439 return EINVAL; 1440 else if (memcmp(zero, CLLADDR(sdl), sizeof(zero)) == 0) 1441 return EINVAL; 1442 /*FALLTHROUGH*/ 1443 default: 1444 return ifioctl_common(ifp, cmd, data); 1445 } 1446 return 0; 1447 } 1448 1449 /* 1450 * Enable/disable passing VLAN packets if the parent interface supports it. 1451 * Return: 1452 * 0: Ok 1453 * -1: Parent interface does not support vlans 1454 * >0: Error 1455 */ 1456 int 1457 ether_enable_vlan_mtu(struct ifnet *ifp) 1458 { 1459 int error; 1460 struct ethercom *ec = (void *)ifp; 1461 1462 /* Parent does not support VLAN's */ 1463 if ((ec->ec_capabilities & ETHERCAP_VLAN_MTU) == 0) 1464 return -1; 1465 1466 /* 1467 * Parent supports the VLAN_MTU capability, 1468 * i.e. can Tx/Rx larger than ETHER_MAX_LEN frames; 1469 * enable it. 1470 */ 1471 ec->ec_capenable |= ETHERCAP_VLAN_MTU; 1472 1473 /* Interface is down, defer for later */ 1474 if ((ifp->if_flags & IFF_UP) == 0) 1475 return 0; 1476 1477 if ((error = if_flags_set(ifp, ifp->if_flags)) == 0) 1478 return 0; 1479 1480 ec->ec_capenable &= ~ETHERCAP_VLAN_MTU; 1481 return error; 1482 } 1483 1484 int 1485 ether_disable_vlan_mtu(struct ifnet *ifp) 1486 { 1487 int error; 1488 struct ethercom *ec = (void *)ifp; 1489 1490 /* We still have VLAN's, defer for later */ 1491 if (ec->ec_nvlans != 0) 1492 return 0; 1493 1494 /* Parent does not support VLAB's, nothing to do. */ 1495 if ((ec->ec_capenable & ETHERCAP_VLAN_MTU) == 0) 1496 return -1; 1497 1498 /* 1499 * Disable Tx/Rx of VLAN-sized frames. 1500 */ 1501 ec->ec_capenable &= ~ETHERCAP_VLAN_MTU; 1502 1503 /* Interface is down, defer for later */ 1504 if ((ifp->if_flags & IFF_UP) == 0) 1505 return 0; 1506 1507 if ((error = if_flags_set(ifp, ifp->if_flags)) == 0) 1508 return 0; 1509 1510 ec->ec_capenable |= ETHERCAP_VLAN_MTU; 1511 return error; 1512 } 1513 1514 static int 1515 ether_multicast_sysctl(SYSCTLFN_ARGS) 1516 { 1517 struct ether_multi *enm; 1518 struct ifnet *ifp; 1519 struct ethercom *ec; 1520 int error = 0; 1521 size_t written; 1522 struct psref psref; 1523 int bound; 1524 unsigned int multicnt; 1525 struct ether_multi_sysctl *addrs; 1526 int i; 1527 1528 if (namelen != 1) 1529 return EINVAL; 1530 1531 bound = curlwp_bind(); 1532 ifp = if_get_byindex(name[0], &psref); 1533 if (ifp == NULL) { 1534 error = ENODEV; 1535 goto out; 1536 } 1537 if (ifp->if_type != IFT_ETHER) { 1538 if_put(ifp, &psref); 1539 *oldlenp = 0; 1540 goto out; 1541 } 1542 ec = (struct ethercom *)ifp; 1543 1544 if (oldp == NULL) { 1545 if_put(ifp, &psref); 1546 *oldlenp = ec->ec_multicnt * sizeof(*addrs); 1547 goto out; 1548 } 1549 1550 /* 1551 * ec->ec_lock is a spin mutex so we cannot call sysctl_copyout, which 1552 * is sleepable, with holding it. Copy data to a local buffer first 1553 * with holding it and then call sysctl_copyout without holding it. 1554 */ 1555 retry: 1556 multicnt = ec->ec_multicnt; 1557 addrs = kmem_alloc(sizeof(*addrs) * multicnt, KM_SLEEP); 1558 1559 ETHER_LOCK(ec); 1560 if (multicnt < ec->ec_multicnt) { 1561 /* The number of multicast addresses have increased */ 1562 ETHER_UNLOCK(ec); 1563 kmem_free(addrs, sizeof(*addrs) * multicnt); 1564 goto retry; 1565 } 1566 1567 i = 0; 1568 LIST_FOREACH(enm, &ec->ec_multiaddrs, enm_list) { 1569 struct ether_multi_sysctl *addr = &addrs[i]; 1570 addr->enm_refcount = enm->enm_refcount; 1571 memcpy(addr->enm_addrlo, enm->enm_addrlo, ETHER_ADDR_LEN); 1572 memcpy(addr->enm_addrhi, enm->enm_addrhi, ETHER_ADDR_LEN); 1573 i++; 1574 } 1575 ETHER_UNLOCK(ec); 1576 1577 error = 0; 1578 written = 0; 1579 for (i = 0; i < multicnt; i++) { 1580 struct ether_multi_sysctl *addr = &addrs[i]; 1581 1582 if (written + sizeof(*addr) > *oldlenp) 1583 break; 1584 error = sysctl_copyout(l, addr, oldp, sizeof(*addr)); 1585 if (error) 1586 break; 1587 written += sizeof(*addr); 1588 oldp = (char *)oldp + sizeof(*addr); 1589 } 1590 kmem_free(addrs, sizeof(*addrs) * multicnt); 1591 1592 if_put(ifp, &psref); 1593 1594 *oldlenp = written; 1595 out: 1596 curlwp_bindx(bound); 1597 return error; 1598 } 1599 1600 static void 1601 ether_sysctl_setup(struct sysctllog **clog) 1602 { 1603 const struct sysctlnode *rnode = NULL; 1604 1605 sysctl_createv(clog, 0, NULL, &rnode, 1606 CTLFLAG_PERMANENT, 1607 CTLTYPE_NODE, "ether", 1608 SYSCTL_DESCR("Ethernet-specific information"), 1609 NULL, 0, NULL, 0, 1610 CTL_NET, CTL_CREATE, CTL_EOL); 1611 1612 sysctl_createv(clog, 0, &rnode, NULL, 1613 CTLFLAG_PERMANENT, 1614 CTLTYPE_NODE, "multicast", 1615 SYSCTL_DESCR("multicast addresses"), 1616 ether_multicast_sysctl, 0, NULL, 0, 1617 CTL_CREATE, CTL_EOL); 1618 } 1619 1620 void 1621 etherinit(void) 1622 { 1623 1624 mutex_init(&bigpktpps_lock, MUTEX_DEFAULT, IPL_NET); 1625 ether_sysctl_setup(NULL); 1626 } 1627
Indexes created Mon Sep 22 10:09:38 GMT 2025