if_ethersubr.c revision 1.222
1 /* $NetBSD: if_ethersubr.c,v 1.222 2016/04/28 00:16:56 ozaki-r 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 1.222 2016/04/28 00:16:56 ozaki-r 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/malloc.h> 84 #include <sys/mbuf.h> 85 #include <sys/mutex.h> 86 #include <sys/ioctl.h> 87 #include <sys/errno.h> 88 #include <sys/device.h> 89 #include <sys/rnd.h> 90 #include <sys/rndsource.h> 91 #include <sys/cpu.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 #ifndef NET_MPSAFE 208 KASSERT(KERNEL_LOCKED_P()); 209 #endif 210 211 #ifdef MBUFTRACE 212 m_claimm(m, ifp->if_mowner); 213 #endif 214 215 #if NCARP > 0 216 if (ifp->if_type == IFT_CARP) { 217 struct ifaddr *ifa; 218 219 /* loop back if this is going to the carp interface */ 220 if (dst != NULL && ifp0->if_link_state == LINK_STATE_UP && 221 (ifa = ifa_ifwithaddr(dst)) != NULL && 222 ifa->ifa_ifp == ifp0) 223 return looutput(ifp0, m, dst, rt); 224 225 ifp = ifp->if_carpdev; 226 /* ac = (struct arpcom *)ifp; */ 227 228 if ((ifp0->if_flags & (IFF_UP|IFF_RUNNING)) != 229 (IFF_UP|IFF_RUNNING)) 230 senderr(ENETDOWN); 231 } 232 #endif /* NCARP > 0 */ 233 234 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 235 senderr(ENETDOWN); 236 237 switch (dst->sa_family) { 238 239 #ifdef INET 240 case AF_INET: 241 if (m->m_flags & M_BCAST) 242 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 243 else if (m->m_flags & M_MCAST) 244 ETHER_MAP_IP_MULTICAST(&satocsin(dst)->sin_addr, edst); 245 else if ((error = arpresolve(ifp, rt, m, dst, edst, 246 sizeof(edst))) != 0) 247 return error == EWOULDBLOCK ? 0 : error; 248 /* If broadcasting on a simplex interface, loopback a copy */ 249 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 250 mcopy = m_copy(m, 0, (int)M_COPYALL); 251 etype = htons(ETHERTYPE_IP); 252 break; 253 254 case AF_ARP: 255 ah = mtod(m, struct arphdr *); 256 if (m->m_flags & M_BCAST) 257 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 258 else { 259 void *tha = ar_tha(ah); 260 261 if (tha == NULL) { 262 /* fake with ARPHDR_IEEE1394 */ 263 return 0; 264 } 265 memcpy(edst, tha, sizeof(edst)); 266 } 267 268 ah->ar_hrd = htons(ARPHRD_ETHER); 269 270 switch (ntohs(ah->ar_op)) { 271 case ARPOP_REVREQUEST: 272 case ARPOP_REVREPLY: 273 etype = htons(ETHERTYPE_REVARP); 274 break; 275 276 case ARPOP_REQUEST: 277 case ARPOP_REPLY: 278 default: 279 etype = htons(ETHERTYPE_ARP); 280 } 281 282 break; 283 #endif 284 #ifdef INET6 285 case AF_INET6: 286 if (!nd6_storelladdr(ifp, rt, m, dst, edst, sizeof(edst))){ 287 /* something bad happened */ 288 return (0); 289 } 290 etype = htons(ETHERTYPE_IPV6); 291 break; 292 #endif 293 #ifdef NETATALK 294 case AF_APPLETALK: 295 if (aarpresolve(ifp, m, (const struct sockaddr_at *)dst, edst)) { 296 #ifdef NETATALKDEBUG 297 printf("aarpresolv failed\n"); 298 #endif /* NETATALKDEBUG */ 299 return (0); 300 } 301 /* 302 * ifaddr is the first thing in at_ifaddr 303 */ 304 aa = (struct at_ifaddr *) at_ifawithnet( 305 (const struct sockaddr_at *)dst, ifp); 306 if (aa == NULL) 307 goto bad; 308 309 /* 310 * In the phase 2 case, we need to prepend an mbuf for the 311 * llc header. Since we must preserve the value of m, 312 * which is passed to us by value, we m_copy() the first 313 * mbuf, and use it for our llc header. 314 */ 315 if (aa->aa_flags & AFA_PHASE2) { 316 struct llc llc; 317 318 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 319 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 320 llc.llc_control = LLC_UI; 321 memcpy(llc.llc_snap_org_code, at_org_code, 322 sizeof(llc.llc_snap_org_code)); 323 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 324 memcpy(mtod(m, void *), &llc, sizeof(struct llc)); 325 } else { 326 etype = htons(ETHERTYPE_ATALK); 327 } 328 break; 329 #endif /* NETATALK */ 330 case pseudo_AF_HDRCMPLT: 331 hdrcmplt = 1; 332 memcpy(esrc, 333 ((const struct ether_header *)dst->sa_data)->ether_shost, 334 sizeof(esrc)); 335 /* FALLTHROUGH */ 336 337 case AF_UNSPEC: 338 memcpy(edst, 339 ((const struct ether_header *)dst->sa_data)->ether_dhost, 340 sizeof(edst)); 341 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 342 etype = ((const struct ether_header *)dst->sa_data)->ether_type; 343 break; 344 345 default: 346 printf("%s: can't handle af%d\n", ifp->if_xname, 347 dst->sa_family); 348 senderr(EAFNOSUPPORT); 349 } 350 351 #ifdef MPLS 352 { 353 struct m_tag *mtag; 354 mtag = m_tag_find(m, PACKET_TAG_MPLS, NULL); 355 if (mtag != NULL) { 356 /* Having the tag itself indicates it's MPLS */ 357 etype = htons(ETHERTYPE_MPLS); 358 m_tag_delete(m, mtag); 359 } 360 } 361 #endif 362 363 if (mcopy) 364 (void)looutput(ifp, mcopy, dst, rt); 365 366 /* If no ether type is set, this must be a 802.2 formatted packet. 367 */ 368 if (etype == 0) 369 etype = htons(m->m_pkthdr.len); 370 /* 371 * Add local net header. If no space in first mbuf, 372 * allocate another. 373 */ 374 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 375 if (m == 0) 376 senderr(ENOBUFS); 377 eh = mtod(m, struct ether_header *); 378 /* Note: etype is already in network byte order. */ 379 (void)memcpy(&eh->ether_type, &etype, sizeof(eh->ether_type)); 380 memcpy(eh->ether_dhost, edst, sizeof(edst)); 381 if (hdrcmplt) 382 memcpy(eh->ether_shost, esrc, sizeof(eh->ether_shost)); 383 else 384 memcpy(eh->ether_shost, CLLADDR(ifp->if_sadl), 385 sizeof(eh->ether_shost)); 386 387 #if NCARP > 0 388 if (ifp0 != ifp && ifp0->if_type == IFT_CARP) { 389 memcpy(eh->ether_shost, CLLADDR(ifp0->if_sadl), 390 sizeof(eh->ether_shost)); 391 } 392 #endif /* NCARP > 0 */ 393 394 if ((error = pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 395 return (error); 396 if (m == NULL) 397 return (0); 398 399 #if NBRIDGE > 0 400 /* 401 * Bridges require special output handling. 402 */ 403 if (ifp->if_bridge) 404 return (bridge_output(ifp, m, NULL, NULL)); 405 #endif 406 407 #if NCARP > 0 408 if (ifp != ifp0) 409 ifp0->if_obytes += m->m_pkthdr.len + ETHER_HDR_LEN; 410 #endif /* NCARP > 0 */ 411 412 #ifdef ALTQ 413 /* 414 * If ALTQ is enabled on the parent interface, do 415 * classification; the queueing discipline might not 416 * require classification, but might require the 417 * address family/header pointer in the pktattr. 418 */ 419 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 420 altq_etherclassify(&ifp->if_snd, m); 421 #endif 422 return ifq_enqueue(ifp, m); 423 424 bad: 425 if (m) 426 m_freem(m); 427 return (error); 428 } 429 430 #ifdef ALTQ 431 /* 432 * This routine is a slight hack to allow a packet to be classified 433 * if the Ethernet headers are present. It will go away when ALTQ's 434 * classification engine understands link headers. 435 */ 436 void 437 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m) 438 { 439 struct ether_header *eh; 440 uint16_t ether_type; 441 int hlen, af, hdrsize; 442 void *hdr; 443 444 hlen = ETHER_HDR_LEN; 445 eh = mtod(m, struct ether_header *); 446 447 ether_type = htons(eh->ether_type); 448 449 if (ether_type < ETHERMTU) { 450 /* LLC/SNAP */ 451 struct llc *llc = (struct llc *)(eh + 1); 452 hlen += 8; 453 454 if (m->m_len < hlen || 455 llc->llc_dsap != LLC_SNAP_LSAP || 456 llc->llc_ssap != LLC_SNAP_LSAP || 457 llc->llc_control != LLC_UI) { 458 /* Not SNAP. */ 459 goto bad; 460 } 461 462 ether_type = htons(llc->llc_un.type_snap.ether_type); 463 } 464 465 switch (ether_type) { 466 case ETHERTYPE_IP: 467 af = AF_INET; 468 hdrsize = 20; /* sizeof(struct ip) */ 469 break; 470 471 case ETHERTYPE_IPV6: 472 af = AF_INET6; 473 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 474 break; 475 476 default: 477 af = AF_UNSPEC; 478 hdrsize = 0; 479 break; 480 } 481 482 while (m->m_len <= hlen) { 483 hlen -= m->m_len; 484 m = m->m_next; 485 } 486 if (m->m_len < (hlen + hdrsize)) { 487 /* 488 * protocol header not in a single mbuf. 489 * We can't cope with this situation right 490 * now (but it shouldn't ever happen, really, anyhow). 491 */ 492 #ifdef DEBUG 493 printf("altq_etherclassify: headers span multiple mbufs: " 494 "%d < %d\n", m->m_len, (hlen + hdrsize)); 495 #endif 496 goto bad; 497 } 498 499 m->m_data += hlen; 500 m->m_len -= hlen; 501 502 hdr = mtod(m, void *); 503 504 if (ALTQ_NEEDS_CLASSIFY(ifq)) 505 m->m_pkthdr.pattr_class = 506 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 507 m->m_pkthdr.pattr_af = af; 508 m->m_pkthdr.pattr_hdr = hdr; 509 510 m->m_data -= hlen; 511 m->m_len += hlen; 512 513 return; 514 515 bad: 516 m->m_pkthdr.pattr_class = NULL; 517 m->m_pkthdr.pattr_hdr = NULL; 518 m->m_pkthdr.pattr_af = AF_UNSPEC; 519 } 520 #endif /* ALTQ */ 521 522 /* 523 * Process a received Ethernet packet; 524 * the packet is in the mbuf chain m with 525 * the ether header. 526 */ 527 void 528 ether_input(struct ifnet *ifp, struct mbuf *m) 529 { 530 struct ethercom *ec = (struct ethercom *) ifp; 531 pktqueue_t *pktq = NULL; 532 struct ifqueue *inq = NULL; 533 uint16_t etype; 534 struct ether_header *eh; 535 size_t ehlen; 536 static int earlypkts; 537 int isr = 0; 538 #if defined (LLC) || defined(NETATALK) 539 struct llc *l; 540 #endif 541 542 KASSERT(!cpu_intr_p()); 543 544 if ((ifp->if_flags & IFF_UP) == 0) { 545 m_freem(m); 546 return; 547 } 548 549 #ifdef MBUFTRACE 550 m_claimm(m, &ec->ec_rx_mowner); 551 #endif 552 eh = mtod(m, struct ether_header *); 553 etype = ntohs(eh->ether_type); 554 ehlen = sizeof(*eh); 555 556 if(__predict_false(earlypkts < 100 || !rnd_initial_entropy)) { 557 rnd_add_data(NULL, eh, ehlen, 0); 558 earlypkts++; 559 } 560 561 /* 562 * Determine if the packet is within its size limits. 563 */ 564 if (etype != ETHERTYPE_MPLS && m->m_pkthdr.len > 565 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 566 mutex_enter(&bigpktpps_lock); 567 if (ppsratecheck(&bigpktppslim_last, &bigpktpps_count, 568 bigpktppslim)) { 569 printf("%s: discarding oversize frame (len=%d)\n", 570 ifp->if_xname, m->m_pkthdr.len); 571 } 572 mutex_exit(&bigpktpps_lock); 573 m_freem(m); 574 return; 575 } 576 577 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 578 /* 579 * If this is not a simplex interface, drop the packet 580 * if it came from us. 581 */ 582 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 583 memcmp(CLLADDR(ifp->if_sadl), eh->ether_shost, 584 ETHER_ADDR_LEN) == 0) { 585 m_freem(m); 586 return; 587 } 588 589 if (memcmp(etherbroadcastaddr, 590 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 591 m->m_flags |= M_BCAST; 592 else 593 m->m_flags |= M_MCAST; 594 ifp->if_imcasts++; 595 } 596 597 /* If the CRC is still on the packet, trim it off. */ 598 if (m->m_flags & M_HASFCS) { 599 m_adj(m, -ETHER_CRC_LEN); 600 m->m_flags &= ~M_HASFCS; 601 } 602 603 ifp->if_ibytes += m->m_pkthdr.len; 604 605 #if NCARP > 0 606 if (__predict_false(ifp->if_carp && ifp->if_type != IFT_CARP)) { 607 /* 608 * clear M_PROMISC, in case the packets comes from a 609 * vlan 610 */ 611 m->m_flags &= ~M_PROMISC; 612 if (carp_input(m, (uint8_t *)&eh->ether_shost, 613 (uint8_t *)&eh->ether_dhost, eh->ether_type) == 0) 614 return; 615 } 616 #endif /* NCARP > 0 */ 617 if ((m->m_flags & (M_BCAST|M_MCAST|M_PROMISC)) == 0 && 618 (ifp->if_flags & IFF_PROMISC) != 0 && 619 memcmp(CLLADDR(ifp->if_sadl), eh->ether_dhost, 620 ETHER_ADDR_LEN) != 0) { 621 m->m_flags |= M_PROMISC; 622 } 623 624 if ((m->m_flags & M_PROMISC) == 0) { 625 if (pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 626 return; 627 if (m == NULL) 628 return; 629 630 eh = mtod(m, struct ether_header *); 631 etype = ntohs(eh->ether_type); 632 ehlen = sizeof(*eh); 633 } 634 635 #if NAGR > 0 636 if (ifp->if_agrprivate && 637 __predict_true(etype != ETHERTYPE_SLOWPROTOCOLS)) { 638 m->m_flags &= ~M_PROMISC; 639 agr_input(ifp, m); 640 return; 641 } 642 #endif /* NAGR > 0 */ 643 644 /* 645 * If VLANs are configured on the interface, check to 646 * see if the device performed the decapsulation and 647 * provided us with the tag. 648 */ 649 if (ec->ec_nvlans && m_tag_find(m, PACKET_TAG_VLAN, NULL) != NULL) { 650 #if NVLAN > 0 651 /* 652 * vlan_input() will either recursively call ether_input() 653 * or drop the packet. 654 */ 655 vlan_input(ifp, m); 656 #else 657 m_freem(m); 658 #endif 659 return; 660 } 661 662 /* 663 * Handle protocols that expect to have the Ethernet header 664 * (and possibly FCS) intact. 665 */ 666 switch (etype) { 667 case ETHERTYPE_VLAN: { 668 struct ether_vlan_header *evl = (void *)eh; 669 /* 670 * If there is a tag of 0, then the VLAN header was probably 671 * just being used to store the priority. Extract the ether 672 * type, and if IP or IPV6, let them deal with it. 673 */ 674 if (m->m_len <= sizeof(*evl) 675 && EVL_VLANOFTAG(evl->evl_tag) == 0) { 676 etype = ntohs(evl->evl_proto); 677 ehlen = sizeof(*evl); 678 if ((m->m_flags & M_PROMISC) == 0 679 && (etype == ETHERTYPE_IP 680 || etype == ETHERTYPE_IPV6)) 681 break; 682 } 683 #if NVLAN > 0 684 /* 685 * vlan_input() will either recursively call ether_input() 686 * or drop the packet. 687 */ 688 if (((struct ethercom *)ifp)->ec_nvlans != 0) 689 vlan_input(ifp, m); 690 else 691 #endif /* NVLAN > 0 */ 692 m_freem(m); 693 return; 694 } 695 #if NPPPOE > 0 696 case ETHERTYPE_PPPOEDISC: 697 pppoedisc_input(ifp, m); 698 return; 699 case ETHERTYPE_PPPOE: 700 pppoe_input(ifp, m); 701 return; 702 #endif /* NPPPOE > 0 */ 703 case ETHERTYPE_SLOWPROTOCOLS: { 704 uint8_t subtype; 705 706 #if defined(DIAGNOSTIC) 707 if (m->m_pkthdr.len < sizeof(*eh) + sizeof(subtype)) { 708 panic("ether_input: too short slow protocol packet"); 709 } 710 #endif 711 m_copydata(m, sizeof(*eh), sizeof(subtype), &subtype); 712 switch (subtype) { 713 #if NAGR > 0 714 case SLOWPROTOCOLS_SUBTYPE_LACP: 715 if (ifp->if_agrprivate) { 716 ieee8023ad_lacp_input(ifp, m); 717 return; 718 } 719 break; 720 721 case SLOWPROTOCOLS_SUBTYPE_MARKER: 722 if (ifp->if_agrprivate) { 723 ieee8023ad_marker_input(ifp, m); 724 return; 725 } 726 break; 727 #endif /* NAGR > 0 */ 728 default: 729 if (subtype == 0 || subtype > 10) { 730 /* illegal value */ 731 m_freem(m); 732 return; 733 } 734 /* unknown subtype */ 735 break; 736 } 737 /* FALLTHROUGH */ 738 } 739 default: 740 if (m->m_flags & M_PROMISC) { 741 m_freem(m); 742 return; 743 } 744 } 745 746 /* If the CRC is still on the packet, trim it off. */ 747 if (m->m_flags & M_HASFCS) { 748 m_adj(m, -ETHER_CRC_LEN); 749 m->m_flags &= ~M_HASFCS; 750 } 751 752 if (etype > ETHERMTU + sizeof (struct ether_header)) { 753 /* Strip off the Ethernet header. */ 754 m_adj(m, ehlen); 755 756 switch (etype) { 757 #ifdef INET 758 case ETHERTYPE_IP: 759 #ifdef GATEWAY 760 if (ipflow_fastforward(m)) 761 return; 762 #endif 763 pktq = ip_pktq; 764 break; 765 766 case ETHERTYPE_ARP: 767 isr = NETISR_ARP; 768 inq = &arpintrq; 769 break; 770 771 case ETHERTYPE_REVARP: 772 revarpinput(m); /* XXX queue? */ 773 return; 774 #endif 775 #ifdef INET6 776 case ETHERTYPE_IPV6: 777 if (__predict_false(!in6_present)) { 778 m_freem(m); 779 return; 780 } 781 #ifdef GATEWAY 782 if (ip6flow_fastforward(&m)) 783 return; 784 #endif 785 pktq = ip6_pktq; 786 break; 787 #endif 788 #ifdef NETATALK 789 case ETHERTYPE_ATALK: 790 isr = NETISR_ATALK; 791 inq = &atintrq1; 792 break; 793 case ETHERTYPE_AARP: 794 /* probably this should be done with a NETISR as well */ 795 aarpinput(ifp, m); /* XXX */ 796 return; 797 #endif /* NETATALK */ 798 #ifdef MPLS 799 case ETHERTYPE_MPLS: 800 isr = NETISR_MPLS; 801 inq = &mplsintrq; 802 break; 803 #endif 804 default: 805 m_freem(m); 806 return; 807 } 808 } else { 809 #if defined (LLC) || defined (NETATALK) 810 l = (struct llc *)(eh+1); 811 switch (l->llc_dsap) { 812 #ifdef NETATALK 813 case LLC_SNAP_LSAP: 814 switch (l->llc_control) { 815 case LLC_UI: 816 if (l->llc_ssap != LLC_SNAP_LSAP) { 817 goto dropanyway; 818 } 819 820 if (memcmp(&(l->llc_snap_org_code)[0], 821 at_org_code, sizeof(at_org_code)) == 0 && 822 ntohs(l->llc_snap_ether_type) == 823 ETHERTYPE_ATALK) { 824 inq = &atintrq2; 825 m_adj(m, sizeof(struct ether_header) 826 + sizeof(struct llc)); 827 isr = NETISR_ATALK; 828 break; 829 } 830 831 if (memcmp(&(l->llc_snap_org_code)[0], 832 aarp_org_code, 833 sizeof(aarp_org_code)) == 0 && 834 ntohs(l->llc_snap_ether_type) == 835 ETHERTYPE_AARP) { 836 m_adj( m, sizeof(struct ether_header) 837 + sizeof(struct llc)); 838 aarpinput(ifp, m); /* XXX */ 839 return; 840 } 841 842 default: 843 goto dropanyway; 844 } 845 break; 846 dropanyway: 847 #endif 848 default: 849 m_freem(m); 850 return; 851 } 852 #else /* ISO || LLC || NETATALK*/ 853 m_freem(m); 854 return; 855 #endif /* ISO || LLC || NETATALK*/ 856 } 857 858 if (__predict_true(pktq)) { 859 const uint32_t h = pktq_rps_hash(m); 860 if (__predict_false(!pktq_enqueue(pktq, m, h))) { 861 m_freem(m); 862 } 863 return; 864 } 865 866 if (__predict_false(!inq)) { 867 /* Should not happen. */ 868 m_freem(m); 869 return; 870 } 871 if (IF_QFULL(inq)) { 872 IF_DROP(inq); 873 m_freem(m); 874 } else { 875 IF_ENQUEUE(inq, m); 876 schednetisr(isr); 877 } 878 } 879 880 /* 881 * Convert Ethernet address to printable (loggable) representation. 882 */ 883 char * 884 ether_sprintf(const u_char *ap) 885 { 886 static char etherbuf[3 * ETHER_ADDR_LEN]; 887 return ether_snprintf(etherbuf, sizeof(etherbuf), ap); 888 } 889 890 char * 891 ether_snprintf(char *buf, size_t len, const u_char *ap) 892 { 893 char *cp = buf; 894 size_t i; 895 896 for (i = 0; i < len / 3; i++) { 897 *cp++ = hexdigits[*ap >> 4]; 898 *cp++ = hexdigits[*ap++ & 0xf]; 899 *cp++ = ':'; 900 } 901 *--cp = '\0'; 902 return buf; 903 } 904 905 /* 906 * Perform common duties while attaching to interface list 907 */ 908 void 909 ether_ifattach(struct ifnet *ifp, const uint8_t *lla) 910 { 911 struct ethercom *ec = (struct ethercom *)ifp; 912 913 ifp->if_type = IFT_ETHER; 914 ifp->if_hdrlen = ETHER_HDR_LEN; 915 ifp->if_dlt = DLT_EN10MB; 916 ifp->if_mtu = ETHERMTU; 917 ifp->if_output = ether_output; 918 ifp->_if_input = ether_input; 919 if (ifp->if_baudrate == 0) 920 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 921 922 if_set_sadl(ifp, lla, ETHER_ADDR_LEN, !ETHER_IS_LOCAL(lla)); 923 924 LIST_INIT(&ec->ec_multiaddrs); 925 ifp->if_broadcastaddr = etherbroadcastaddr; 926 bpf_attach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 927 #ifdef MBUFTRACE 928 strlcpy(ec->ec_tx_mowner.mo_name, ifp->if_xname, 929 sizeof(ec->ec_tx_mowner.mo_name)); 930 strlcpy(ec->ec_tx_mowner.mo_descr, "tx", 931 sizeof(ec->ec_tx_mowner.mo_descr)); 932 strlcpy(ec->ec_rx_mowner.mo_name, ifp->if_xname, 933 sizeof(ec->ec_rx_mowner.mo_name)); 934 strlcpy(ec->ec_rx_mowner.mo_descr, "rx", 935 sizeof(ec->ec_rx_mowner.mo_descr)); 936 MOWNER_ATTACH(&ec->ec_tx_mowner); 937 MOWNER_ATTACH(&ec->ec_rx_mowner); 938 ifp->if_mowner = &ec->ec_tx_mowner; 939 #endif 940 } 941 942 void 943 ether_ifdetach(struct ifnet *ifp) 944 { 945 struct ethercom *ec = (void *) ifp; 946 struct ether_multi *enm; 947 int s; 948 949 /* 950 * Prevent further calls to ioctl (for example turning off 951 * promiscuous mode from the bridge code), which eventually can 952 * call if_init() which can cause panics because the interface 953 * is in the process of being detached. Return device not configured 954 * instead. 955 */ 956 ifp->if_ioctl = (int (*)(struct ifnet *, u_long, void *))enxio; 957 958 #if NBRIDGE > 0 959 if (ifp->if_bridge) 960 bridge_ifdetach(ifp); 961 #endif 962 963 bpf_detach(ifp); 964 965 #if NVLAN > 0 966 if (ec->ec_nvlans) 967 vlan_ifdetach(ifp); 968 #endif 969 970 s = splnet(); 971 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 972 LIST_REMOVE(enm, enm_list); 973 free(enm, M_IFMADDR); 974 ec->ec_multicnt--; 975 } 976 splx(s); 977 978 ifp->if_mowner = NULL; 979 MOWNER_DETACH(&ec->ec_rx_mowner); 980 MOWNER_DETACH(&ec->ec_tx_mowner); 981 } 982 983 #if 0 984 /* 985 * This is for reference. We have a table-driven version 986 * of the little-endian crc32 generator, which is faster 987 * than the double-loop. 988 */ 989 uint32_t 990 ether_crc32_le(const uint8_t *buf, size_t len) 991 { 992 uint32_t c, crc, carry; 993 size_t i, j; 994 995 crc = 0xffffffffU; /* initial value */ 996 997 for (i = 0; i < len; i++) { 998 c = buf[i]; 999 for (j = 0; j < 8; j++) { 1000 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1001 crc >>= 1; 1002 c >>= 1; 1003 if (carry) 1004 crc = (crc ^ ETHER_CRC_POLY_LE); 1005 } 1006 } 1007 1008 return (crc); 1009 } 1010 #else 1011 uint32_t 1012 ether_crc32_le(const uint8_t *buf, size_t len) 1013 { 1014 static const uint32_t crctab[] = { 1015 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1016 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1017 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1018 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1019 }; 1020 uint32_t crc; 1021 size_t i; 1022 1023 crc = 0xffffffffU; /* initial value */ 1024 1025 for (i = 0; i < len; i++) { 1026 crc ^= buf[i]; 1027 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1028 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1029 } 1030 1031 return (crc); 1032 } 1033 #endif 1034 1035 uint32_t 1036 ether_crc32_be(const uint8_t *buf, size_t len) 1037 { 1038 uint32_t c, crc, carry; 1039 size_t i, j; 1040 1041 crc = 0xffffffffU; /* initial value */ 1042 1043 for (i = 0; i < len; i++) { 1044 c = buf[i]; 1045 for (j = 0; j < 8; j++) { 1046 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1047 crc <<= 1; 1048 c >>= 1; 1049 if (carry) 1050 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1051 } 1052 } 1053 1054 return (crc); 1055 } 1056 1057 #ifdef INET 1058 const uint8_t ether_ipmulticast_min[ETHER_ADDR_LEN] = 1059 { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1060 const uint8_t ether_ipmulticast_max[ETHER_ADDR_LEN] = 1061 { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1062 #endif 1063 #ifdef INET6 1064 const uint8_t ether_ip6multicast_min[ETHER_ADDR_LEN] = 1065 { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1066 const uint8_t ether_ip6multicast_max[ETHER_ADDR_LEN] = 1067 { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1068 #endif 1069 1070 /* 1071 * ether_aton implementation, not using a static buffer. 1072 */ 1073 int 1074 ether_aton_r(u_char *dest, size_t len, const char *str) 1075 { 1076 const u_char *cp = (const void *)str; 1077 u_char *ep; 1078 1079 #define atox(c) (((c) <= '9') ? ((c) - '0') : ((toupper(c) - 'A') + 10)) 1080 1081 if (len < ETHER_ADDR_LEN) 1082 return ENOSPC; 1083 1084 ep = dest + ETHER_ADDR_LEN; 1085 1086 while (*cp) { 1087 if (!isxdigit(*cp)) 1088 return EINVAL; 1089 *dest = atox(*cp); 1090 cp++; 1091 if (isxdigit(*cp)) { 1092 *dest = (*dest << 4) | atox(*cp); 1093 dest++; 1094 cp++; 1095 } else 1096 dest++; 1097 if (dest == ep) 1098 return *cp == '\0' ? 0 : ENAMETOOLONG; 1099 switch (*cp) { 1100 case ':': 1101 case '-': 1102 case '.': 1103 cp++; 1104 break; 1105 } 1106 } 1107 return ENOBUFS; 1108 } 1109 1110 /* 1111 * Convert a sockaddr into an Ethernet address or range of Ethernet 1112 * addresses. 1113 */ 1114 int 1115 ether_multiaddr(const struct sockaddr *sa, uint8_t addrlo[ETHER_ADDR_LEN], 1116 uint8_t addrhi[ETHER_ADDR_LEN]) 1117 { 1118 #ifdef INET 1119 const struct sockaddr_in *sin; 1120 #endif /* INET */ 1121 #ifdef INET6 1122 const struct sockaddr_in6 *sin6; 1123 #endif /* INET6 */ 1124 1125 switch (sa->sa_family) { 1126 1127 case AF_UNSPEC: 1128 memcpy(addrlo, sa->sa_data, ETHER_ADDR_LEN); 1129 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1130 break; 1131 1132 #ifdef INET 1133 case AF_INET: 1134 sin = satocsin(sa); 1135 if (sin->sin_addr.s_addr == INADDR_ANY) { 1136 /* 1137 * An IP address of INADDR_ANY means listen to 1138 * or stop listening to all of the Ethernet 1139 * multicast addresses used for IP. 1140 * (This is for the sake of IP multicast routers.) 1141 */ 1142 memcpy(addrlo, ether_ipmulticast_min, ETHER_ADDR_LEN); 1143 memcpy(addrhi, ether_ipmulticast_max, ETHER_ADDR_LEN); 1144 } 1145 else { 1146 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1147 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1148 } 1149 break; 1150 #endif 1151 #ifdef INET6 1152 case AF_INET6: 1153 sin6 = satocsin6(sa); 1154 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1155 /* 1156 * An IP6 address of 0 means listen to or stop 1157 * listening to all of the Ethernet multicast 1158 * address used for IP6. 1159 * (This is used for multicast routers.) 1160 */ 1161 memcpy(addrlo, ether_ip6multicast_min, ETHER_ADDR_LEN); 1162 memcpy(addrhi, ether_ip6multicast_max, ETHER_ADDR_LEN); 1163 } else { 1164 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1165 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1166 } 1167 break; 1168 #endif 1169 1170 default: 1171 return EAFNOSUPPORT; 1172 } 1173 return 0; 1174 } 1175 1176 /* 1177 * Add an Ethernet multicast address or range of addresses to the list for a 1178 * given interface. 1179 */ 1180 int 1181 ether_addmulti(const struct sockaddr *sa, struct ethercom *ec) 1182 { 1183 struct ether_multi *enm; 1184 u_char addrlo[ETHER_ADDR_LEN]; 1185 u_char addrhi[ETHER_ADDR_LEN]; 1186 int s = splnet(), error; 1187 1188 error = ether_multiaddr(sa, addrlo, addrhi); 1189 if (error != 0) { 1190 splx(s); 1191 return error; 1192 } 1193 1194 /* 1195 * Verify that we have valid Ethernet multicast addresses. 1196 */ 1197 if (!ETHER_IS_MULTICAST(addrlo) || !ETHER_IS_MULTICAST(addrhi)) { 1198 splx(s); 1199 return EINVAL; 1200 } 1201 /* 1202 * See if the address range is already in the list. 1203 */ 1204 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1205 if (enm != NULL) { 1206 /* 1207 * Found it; just increment the reference count. 1208 */ 1209 ++enm->enm_refcount; 1210 splx(s); 1211 return 0; 1212 } 1213 /* 1214 * New address or range; malloc a new multicast record 1215 * and link it into the interface's multicast list. 1216 */ 1217 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1218 if (enm == NULL) { 1219 splx(s); 1220 return ENOBUFS; 1221 } 1222 memcpy(enm->enm_addrlo, addrlo, 6); 1223 memcpy(enm->enm_addrhi, addrhi, 6); 1224 enm->enm_refcount = 1; 1225 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1226 ec->ec_multicnt++; 1227 splx(s); 1228 /* 1229 * Return ENETRESET to inform the driver that the list has changed 1230 * and its reception filter should be adjusted accordingly. 1231 */ 1232 return ENETRESET; 1233 } 1234 1235 /* 1236 * Delete a multicast address record. 1237 */ 1238 int 1239 ether_delmulti(const struct sockaddr *sa, struct ethercom *ec) 1240 { 1241 struct ether_multi *enm; 1242 u_char addrlo[ETHER_ADDR_LEN]; 1243 u_char addrhi[ETHER_ADDR_LEN]; 1244 int s = splnet(), error; 1245 1246 error = ether_multiaddr(sa, addrlo, addrhi); 1247 if (error != 0) { 1248 splx(s); 1249 return (error); 1250 } 1251 1252 /* 1253 * Look ur the address in our list. 1254 */ 1255 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1256 if (enm == NULL) { 1257 splx(s); 1258 return (ENXIO); 1259 } 1260 if (--enm->enm_refcount != 0) { 1261 /* 1262 * Still some claims to this record. 1263 */ 1264 splx(s); 1265 return (0); 1266 } 1267 /* 1268 * No remaining claims to this record; unlink and free it. 1269 */ 1270 LIST_REMOVE(enm, enm_list); 1271 free(enm, M_IFMADDR); 1272 ec->ec_multicnt--; 1273 splx(s); 1274 /* 1275 * Return ENETRESET to inform the driver that the list has changed 1276 * and its reception filter should be adjusted accordingly. 1277 */ 1278 return (ENETRESET); 1279 } 1280 1281 void 1282 ether_set_ifflags_cb(struct ethercom *ec, ether_cb_t cb) 1283 { 1284 ec->ec_ifflags_cb = cb; 1285 } 1286 1287 /* 1288 * Common ioctls for Ethernet interfaces. Note, we must be 1289 * called at splnet(). 1290 */ 1291 int 1292 ether_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1293 { 1294 struct ethercom *ec = (void *) ifp; 1295 struct eccapreq *eccr; 1296 struct ifreq *ifr = (struct ifreq *)data; 1297 struct if_laddrreq *iflr = data; 1298 const struct sockaddr_dl *sdl; 1299 static const uint8_t zero[ETHER_ADDR_LEN]; 1300 int error; 1301 1302 switch (cmd) { 1303 case SIOCINITIFADDR: 1304 { 1305 struct ifaddr *ifa = (struct ifaddr *)data; 1306 if (ifa->ifa_addr->sa_family != AF_LINK 1307 && (ifp->if_flags & (IFF_UP|IFF_RUNNING)) != 1308 (IFF_UP|IFF_RUNNING)) { 1309 ifp->if_flags |= IFF_UP; 1310 if ((error = (*ifp->if_init)(ifp)) != 0) 1311 return error; 1312 } 1313 #ifdef INET 1314 if (ifa->ifa_addr->sa_family == AF_INET) 1315 arp_ifinit(ifp, ifa); 1316 #endif /* INET */ 1317 return 0; 1318 } 1319 1320 case SIOCSIFMTU: 1321 { 1322 int maxmtu; 1323 1324 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1325 maxmtu = ETHERMTU_JUMBO; 1326 else 1327 maxmtu = ETHERMTU; 1328 1329 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1330 return EINVAL; 1331 else if ((error = ifioctl_common(ifp, cmd, data)) != ENETRESET) 1332 return error; 1333 else if (ifp->if_flags & IFF_UP) { 1334 /* Make sure the device notices the MTU change. */ 1335 return (*ifp->if_init)(ifp); 1336 } else 1337 return 0; 1338 } 1339 1340 case SIOCSIFFLAGS: 1341 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1342 return error; 1343 switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) { 1344 case IFF_RUNNING: 1345 /* 1346 * If interface is marked down and it is running, 1347 * then stop and disable it. 1348 */ 1349 (*ifp->if_stop)(ifp, 1); 1350 break; 1351 case IFF_UP: 1352 /* 1353 * If interface is marked up and it is stopped, then 1354 * start it. 1355 */ 1356 return (*ifp->if_init)(ifp); 1357 case IFF_UP|IFF_RUNNING: 1358 error = 0; 1359 if (ec->ec_ifflags_cb == NULL || 1360 (error = (*ec->ec_ifflags_cb)(ec)) == ENETRESET) { 1361 /* 1362 * Reset the interface to pick up 1363 * changes in any other flags that 1364 * affect the hardware state. 1365 */ 1366 return (*ifp->if_init)(ifp); 1367 } else 1368 return error; 1369 case 0: 1370 break; 1371 } 1372 return 0; 1373 case SIOCGETHERCAP: 1374 eccr = (struct eccapreq *)data; 1375 eccr->eccr_capabilities = ec->ec_capabilities; 1376 eccr->eccr_capenable = ec->ec_capenable; 1377 return 0; 1378 case SIOCADDMULTI: 1379 return ether_addmulti(ifreq_getaddr(cmd, ifr), ec); 1380 case SIOCDELMULTI: 1381 return ether_delmulti(ifreq_getaddr(cmd, ifr), ec); 1382 case SIOCSIFMEDIA: 1383 case SIOCGIFMEDIA: 1384 if (ec->ec_mii == NULL) 1385 return ENOTTY; 1386 return ifmedia_ioctl(ifp, ifr, &ec->ec_mii->mii_media, cmd); 1387 case SIOCALIFADDR: 1388 sdl = satocsdl(sstocsa(&iflr->addr)); 1389 if (sdl->sdl_family != AF_LINK) 1390 ; 1391 else if (ETHER_IS_MULTICAST(CLLADDR(sdl))) 1392 return EINVAL; 1393 else if (memcmp(zero, CLLADDR(sdl), sizeof(zero)) == 0) 1394 return EINVAL; 1395 /*FALLTHROUGH*/ 1396 default: 1397 return ifioctl_common(ifp, cmd, data); 1398 } 1399 return 0; 1400 } 1401 1402 /* 1403 * Enable/disable passing VLAN packets if the parent interface supports it. 1404 * Return: 1405 * 0: Ok 1406 * -1: Parent interface does not support vlans 1407 * >0: Error 1408 */ 1409 int 1410 ether_enable_vlan_mtu(struct ifnet *ifp) 1411 { 1412 int error; 1413 struct ethercom *ec = (void *)ifp; 1414 1415 /* Already have VLAN's do nothing. */ 1416 if (ec->ec_nvlans != 0) 1417 return 0; 1418 1419 /* Parent does not support VLAN's */ 1420 if ((ec->ec_capabilities & ETHERCAP_VLAN_MTU) == 0) 1421 return -1; 1422 1423 /* 1424 * Parent supports the VLAN_MTU capability, 1425 * i.e. can Tx/Rx larger than ETHER_MAX_LEN frames; 1426 * enable it. 1427 */ 1428 ec->ec_capenable |= ETHERCAP_VLAN_MTU; 1429 1430 /* Interface is down, defer for later */ 1431 if ((ifp->if_flags & IFF_UP) == 0) 1432 return 0; 1433 1434 if ((error = if_flags_set(ifp, ifp->if_flags)) == 0) 1435 return 0; 1436 1437 ec->ec_capenable &= ~ETHERCAP_VLAN_MTU; 1438 return error; 1439 } 1440 1441 int 1442 ether_disable_vlan_mtu(struct ifnet *ifp) 1443 { 1444 int error; 1445 struct ethercom *ec = (void *)ifp; 1446 1447 /* We still have VLAN's, defer for later */ 1448 if (ec->ec_nvlans != 0) 1449 return 0; 1450 1451 /* Parent does not support VLAB's, nothing to do. */ 1452 if ((ec->ec_capenable & ETHERCAP_VLAN_MTU) == 0) 1453 return -1; 1454 1455 /* 1456 * Disable Tx/Rx of VLAN-sized frames. 1457 */ 1458 ec->ec_capenable &= ~ETHERCAP_VLAN_MTU; 1459 1460 /* Interface is down, defer for later */ 1461 if ((ifp->if_flags & IFF_UP) == 0) 1462 return 0; 1463 1464 if ((error = if_flags_set(ifp, ifp->if_flags)) == 0) 1465 return 0; 1466 1467 ec->ec_capenable |= ETHERCAP_VLAN_MTU; 1468 return error; 1469 } 1470 1471 static int 1472 ether_multicast_sysctl(SYSCTLFN_ARGS) 1473 { 1474 struct ether_multi *enm; 1475 struct ether_multi_sysctl addr; 1476 struct ifnet *ifp; 1477 struct ethercom *ec; 1478 int error; 1479 size_t written; 1480 1481 if (namelen != 1) 1482 return EINVAL; 1483 1484 ifp = if_byindex(name[0]); 1485 if (ifp == NULL) 1486 return ENODEV; 1487 if (ifp->if_type != IFT_ETHER) { 1488 *oldlenp = 0; 1489 return 0; 1490 } 1491 ec = (struct ethercom *)ifp; 1492 1493 if (oldp == NULL) { 1494 *oldlenp = ec->ec_multicnt * sizeof(addr); 1495 return 0; 1496 } 1497 1498 memset(&addr, 0, sizeof(addr)); 1499 error = 0; 1500 written = 0; 1501 1502 LIST_FOREACH(enm, &ec->ec_multiaddrs, enm_list) { 1503 if (written + sizeof(addr) > *oldlenp) 1504 break; 1505 addr.enm_refcount = enm->enm_refcount; 1506 memcpy(addr.enm_addrlo, enm->enm_addrlo, ETHER_ADDR_LEN); 1507 memcpy(addr.enm_addrhi, enm->enm_addrhi, ETHER_ADDR_LEN); 1508 error = sysctl_copyout(l, &addr, oldp, sizeof(addr)); 1509 if (error) 1510 break; 1511 written += sizeof(addr); 1512 oldp = (char *)oldp + sizeof(addr); 1513 } 1514 1515 *oldlenp = written; 1516 return error; 1517 } 1518 1519 SYSCTL_SETUP(sysctl_net_ether_setup, "sysctl net.ether subtree setup") 1520 { 1521 const struct sysctlnode *rnode = NULL; 1522 1523 sysctl_createv(clog, 0, NULL, &rnode, 1524 CTLFLAG_PERMANENT, 1525 CTLTYPE_NODE, "ether", 1526 SYSCTL_DESCR("Ethernet-specific information"), 1527 NULL, 0, NULL, 0, 1528 CTL_NET, CTL_CREATE, CTL_EOL); 1529 1530 sysctl_createv(clog, 0, &rnode, NULL, 1531 CTLFLAG_PERMANENT, 1532 CTLTYPE_NODE, "multicast", 1533 SYSCTL_DESCR("multicast addresses"), 1534 ether_multicast_sysctl, 0, NULL, 0, 1535 CTL_CREATE, CTL_EOL); 1536 } 1537 1538 void 1539 etherinit(void) 1540 { 1541 mutex_init(&bigpktpps_lock, MUTEX_DEFAULT, IPL_NET); 1542 } 1543
Indexes created Sun Sep 21 20:09:37 GMT 2025