if_ethersubr.c revision 1.232
1 /* $NetBSD: if_ethersubr.c,v 1.232 2016/12/31 15:07:02 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 1.232 2016/12/31 15:07:02 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 #include <sys/kmem.h> 93 94 #include <net/if.h> 95 #include <net/netisr.h> 96 #include <net/route.h> 97 #include <net/if_llc.h> 98 #include <net/if_dl.h> 99 #include <net/if_types.h> 100 #include <net/pktqueue.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 NETATALK 153 #include <netatalk/at.h> 154 #include <netatalk/at_var.h> 155 #include <netatalk/at_extern.h> 156 157 #define llc_snap_org_code llc_un.type_snap.org_code 158 #define llc_snap_ether_type llc_un.type_snap.ether_type 159 160 extern u_char at_org_code[3]; 161 extern u_char aarp_org_code[3]; 162 #endif /* NETATALK */ 163 164 #ifdef MPLS 165 #include <netmpls/mpls.h> 166 #include <netmpls/mpls_var.h> 167 #endif 168 169 static struct timeval bigpktppslim_last; 170 static int bigpktppslim = 2; /* XXX */ 171 static int bigpktpps_count; 172 static kmutex_t bigpktpps_lock __cacheline_aligned; 173 174 175 const uint8_t etherbroadcastaddr[ETHER_ADDR_LEN] = 176 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 177 const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] = 178 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 }; 179 #define senderr(e) { error = (e); goto bad;} 180 181 static int ether_output(struct ifnet *, struct mbuf *, 182 const struct sockaddr *, const struct rtentry *); 183 184 /* 185 * Ethernet output routine. 186 * Encapsulate a packet of type family for the local net. 187 * Assumes that ifp is actually pointer to ethercom structure. 188 */ 189 static int 190 ether_output(struct ifnet * const ifp0, struct mbuf * const m0, 191 const struct sockaddr * const dst, 192 const struct rtentry *rt) 193 { 194 uint16_t etype = 0; 195 int error = 0, hdrcmplt = 0; 196 uint8_t esrc[6], edst[6]; 197 struct mbuf *m = m0; 198 struct mbuf *mcopy = NULL; 199 struct ether_header *eh; 200 struct ifnet *ifp = ifp0; 201 #ifdef INET 202 struct arphdr *ah; 203 #endif /* INET */ 204 #ifdef NETATALK 205 struct at_ifaddr *aa; 206 #endif /* NETATALK */ 207 208 /* 209 * some paths such as carp_output() call ethr_output() with "ifp" 210 * argument as other than ether ifnet. 211 */ 212 KASSERT(ifp->if_output != ether_output 213 || ifp->if_extflags & IFEF_OUTPUT_MPSAFE); 214 215 #ifdef MBUFTRACE 216 m_claimm(m, ifp->if_mowner); 217 #endif 218 219 #if NCARP > 0 220 if (ifp->if_type == IFT_CARP) { 221 struct ifaddr *ifa; 222 int s = pserialize_read_enter(); 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 if (ifa->ifa_ifp == ifp0) { 228 pserialize_read_exit(s); 229 return looutput(ifp0, m, dst, rt); 230 } 231 } 232 pserialize_read_exit(s); 233 234 ifp = ifp->if_carpdev; 235 /* ac = (struct arpcom *)ifp; */ 236 237 if ((ifp0->if_flags & (IFF_UP|IFF_RUNNING)) != 238 (IFF_UP|IFF_RUNNING)) 239 senderr(ENETDOWN); 240 } 241 #endif /* NCARP > 0 */ 242 243 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 244 senderr(ENETDOWN); 245 246 switch (dst->sa_family) { 247 248 #ifdef INET 249 case AF_INET: 250 #ifndef NET_MPSAFE 251 KERNEL_LOCK(1, NULL); 252 #endif 253 if (m->m_flags & M_BCAST) 254 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 255 else if (m->m_flags & M_MCAST) 256 ETHER_MAP_IP_MULTICAST(&satocsin(dst)->sin_addr, edst); 257 else if ((error = arpresolve(ifp, rt, m, dst, edst, 258 sizeof(edst))) != 0) { 259 #ifndef NET_MPSAFE 260 KERNEL_UNLOCK_ONE(NULL); 261 #endif 262 return error == EWOULDBLOCK ? 0 : error; 263 } 264 #ifndef NET_MPSAFE 265 KERNEL_UNLOCK_ONE(NULL); 266 #endif 267 /* If broadcasting on a simplex interface, loopback a copy */ 268 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 269 mcopy = m_copy(m, 0, (int)M_COPYALL); 270 etype = htons(ETHERTYPE_IP); 271 break; 272 273 case AF_ARP: 274 ah = mtod(m, struct arphdr *); 275 if (m->m_flags & M_BCAST) 276 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 277 else { 278 void *tha = ar_tha(ah); 279 280 if (tha == NULL) { 281 /* fake with ARPHDR_IEEE1394 */ 282 return 0; 283 } 284 memcpy(edst, tha, sizeof(edst)); 285 } 286 287 ah->ar_hrd = htons(ARPHRD_ETHER); 288 289 switch (ntohs(ah->ar_op)) { 290 case ARPOP_REVREQUEST: 291 case ARPOP_REVREPLY: 292 etype = htons(ETHERTYPE_REVARP); 293 break; 294 295 case ARPOP_REQUEST: 296 case ARPOP_REPLY: 297 default: 298 etype = htons(ETHERTYPE_ARP); 299 } 300 301 break; 302 #endif 303 #ifdef INET6 304 case AF_INET6: 305 if (!nd6_storelladdr(ifp, rt, m, dst, edst, sizeof(edst))){ 306 /* something bad happened */ 307 return (0); 308 } 309 etype = htons(ETHERTYPE_IPV6); 310 break; 311 #endif 312 #ifdef NETATALK 313 case AF_APPLETALK: { 314 struct ifaddr *ifa; 315 int s; 316 317 KERNEL_LOCK(1, NULL); 318 if (!aarpresolve(ifp, m, (const struct sockaddr_at *)dst, edst)) { 319 #ifdef NETATALKDEBUG 320 printf("aarpresolv failed\n"); 321 #endif /* NETATALKDEBUG */ 322 KERNEL_UNLOCK_ONE(NULL); 323 return (0); 324 } 325 /* 326 * ifaddr is the first thing in at_ifaddr 327 */ 328 s = pserialize_read_enter(); 329 ifa = at_ifawithnet((const struct sockaddr_at *)dst, ifp); 330 if (ifa == NULL) { 331 pserialize_read_exit(s); 332 KERNEL_UNLOCK_ONE(NULL); 333 goto bad; 334 } 335 aa = (struct at_ifaddr *)ifa; 336 337 /* 338 * In the phase 2 case, we need to prepend an mbuf for the 339 * llc header. Since we must preserve the value of m, 340 * which is passed to us by value, we m_copy() the first 341 * mbuf, and use it for our llc header. 342 */ 343 if (aa->aa_flags & AFA_PHASE2) { 344 struct llc llc; 345 346 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 347 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 348 llc.llc_control = LLC_UI; 349 memcpy(llc.llc_snap_org_code, at_org_code, 350 sizeof(llc.llc_snap_org_code)); 351 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 352 memcpy(mtod(m, void *), &llc, sizeof(struct llc)); 353 } else { 354 etype = htons(ETHERTYPE_ATALK); 355 } 356 pserialize_read_exit(s); 357 KERNEL_UNLOCK_ONE(NULL); 358 break; 359 } 360 #endif /* NETATALK */ 361 case pseudo_AF_HDRCMPLT: 362 hdrcmplt = 1; 363 memcpy(esrc, 364 ((const struct ether_header *)dst->sa_data)->ether_shost, 365 sizeof(esrc)); 366 /* FALLTHROUGH */ 367 368 case AF_UNSPEC: 369 memcpy(edst, 370 ((const struct ether_header *)dst->sa_data)->ether_dhost, 371 sizeof(edst)); 372 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 373 etype = ((const struct ether_header *)dst->sa_data)->ether_type; 374 break; 375 376 default: 377 printf("%s: can't handle af%d\n", ifp->if_xname, 378 dst->sa_family); 379 senderr(EAFNOSUPPORT); 380 } 381 382 #ifdef MPLS 383 KERNEL_LOCK(1, NULL); 384 { 385 struct m_tag *mtag; 386 mtag = m_tag_find(m, PACKET_TAG_MPLS, NULL); 387 if (mtag != NULL) { 388 /* Having the tag itself indicates it's MPLS */ 389 etype = htons(ETHERTYPE_MPLS); 390 m_tag_delete(m, mtag); 391 } 392 } 393 KERNEL_UNLOCK_ONE(NULL); 394 #endif 395 396 if (mcopy) 397 (void)looutput(ifp, mcopy, dst, rt); 398 399 /* If no ether type is set, this must be a 802.2 formatted packet. 400 */ 401 if (etype == 0) 402 etype = htons(m->m_pkthdr.len); 403 /* 404 * Add local net header. If no space in first mbuf, 405 * allocate another. 406 */ 407 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 408 if (m == 0) 409 senderr(ENOBUFS); 410 eh = mtod(m, struct ether_header *); 411 /* Note: etype is already in network byte order. */ 412 (void)memcpy(&eh->ether_type, &etype, sizeof(eh->ether_type)); 413 memcpy(eh->ether_dhost, edst, sizeof(edst)); 414 if (hdrcmplt) 415 memcpy(eh->ether_shost, esrc, sizeof(eh->ether_shost)); 416 else 417 memcpy(eh->ether_shost, CLLADDR(ifp->if_sadl), 418 sizeof(eh->ether_shost)); 419 420 #if NCARP > 0 421 if (ifp0 != ifp && ifp0->if_type == IFT_CARP) { 422 memcpy(eh->ether_shost, CLLADDR(ifp0->if_sadl), 423 sizeof(eh->ether_shost)); 424 } 425 #endif /* NCARP > 0 */ 426 427 if ((error = pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 428 return (error); 429 if (m == NULL) 430 return (0); 431 432 #if NBRIDGE > 0 433 /* 434 * Bridges require special output handling. 435 */ 436 if (ifp->if_bridge) 437 return (bridge_output(ifp, m, NULL, NULL)); 438 #endif 439 440 #if NCARP > 0 441 if (ifp != ifp0) 442 ifp0->if_obytes += m->m_pkthdr.len + ETHER_HDR_LEN; 443 #endif /* NCARP > 0 */ 444 445 #ifdef ALTQ 446 KERNEL_LOCK(1, NULL); 447 /* 448 * If ALTQ is enabled on the parent interface, do 449 * classification; the queueing discipline might not 450 * require classification, but might require the 451 * address family/header pointer in the pktattr. 452 */ 453 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 454 altq_etherclassify(&ifp->if_snd, m); 455 KERNEL_UNLOCK_ONE(NULL); 456 #endif 457 return ifq_enqueue(ifp, m); 458 459 bad: 460 if (m) 461 m_freem(m); 462 return (error); 463 } 464 465 #ifdef ALTQ 466 /* 467 * This routine is a slight hack to allow a packet to be classified 468 * if the Ethernet headers are present. It will go away when ALTQ's 469 * classification engine understands link headers. 470 */ 471 void 472 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m) 473 { 474 struct ether_header *eh; 475 uint16_t ether_type; 476 int hlen, af, hdrsize; 477 void *hdr; 478 479 hlen = ETHER_HDR_LEN; 480 eh = mtod(m, struct ether_header *); 481 482 ether_type = htons(eh->ether_type); 483 484 if (ether_type < ETHERMTU) { 485 /* LLC/SNAP */ 486 struct llc *llc = (struct llc *)(eh + 1); 487 hlen += 8; 488 489 if (m->m_len < hlen || 490 llc->llc_dsap != LLC_SNAP_LSAP || 491 llc->llc_ssap != LLC_SNAP_LSAP || 492 llc->llc_control != LLC_UI) { 493 /* Not SNAP. */ 494 goto bad; 495 } 496 497 ether_type = htons(llc->llc_un.type_snap.ether_type); 498 } 499 500 switch (ether_type) { 501 case ETHERTYPE_IP: 502 af = AF_INET; 503 hdrsize = 20; /* sizeof(struct ip) */ 504 break; 505 506 case ETHERTYPE_IPV6: 507 af = AF_INET6; 508 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 509 break; 510 511 default: 512 af = AF_UNSPEC; 513 hdrsize = 0; 514 break; 515 } 516 517 while (m->m_len <= hlen) { 518 hlen -= m->m_len; 519 m = m->m_next; 520 } 521 if (m->m_len < (hlen + hdrsize)) { 522 /* 523 * protocol header not in a single mbuf. 524 * We can't cope with this situation right 525 * now (but it shouldn't ever happen, really, anyhow). 526 */ 527 #ifdef DEBUG 528 printf("altq_etherclassify: headers span multiple mbufs: " 529 "%d < %d\n", m->m_len, (hlen + hdrsize)); 530 #endif 531 goto bad; 532 } 533 534 m->m_data += hlen; 535 m->m_len -= hlen; 536 537 hdr = mtod(m, void *); 538 539 if (ALTQ_NEEDS_CLASSIFY(ifq)) 540 m->m_pkthdr.pattr_class = 541 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 542 m->m_pkthdr.pattr_af = af; 543 m->m_pkthdr.pattr_hdr = hdr; 544 545 m->m_data -= hlen; 546 m->m_len += hlen; 547 548 return; 549 550 bad: 551 m->m_pkthdr.pattr_class = NULL; 552 m->m_pkthdr.pattr_hdr = NULL; 553 m->m_pkthdr.pattr_af = AF_UNSPEC; 554 } 555 #endif /* ALTQ */ 556 557 /* 558 * Process a received Ethernet packet; 559 * the packet is in the mbuf chain m with 560 * the ether header. 561 */ 562 void 563 ether_input(struct ifnet *ifp, struct mbuf *m) 564 { 565 struct ethercom *ec = (struct ethercom *) ifp; 566 pktqueue_t *pktq = NULL; 567 struct ifqueue *inq = NULL; 568 uint16_t etype; 569 struct ether_header *eh; 570 size_t ehlen; 571 static int earlypkts; 572 int isr = 0; 573 #if defined (LLC) || defined(NETATALK) 574 struct llc *l; 575 #endif 576 577 KASSERT(!cpu_intr_p()); 578 579 if ((ifp->if_flags & IFF_UP) == 0) { 580 m_freem(m); 581 return; 582 } 583 584 #ifdef MBUFTRACE 585 m_claimm(m, &ec->ec_rx_mowner); 586 #endif 587 eh = mtod(m, struct ether_header *); 588 etype = ntohs(eh->ether_type); 589 ehlen = sizeof(*eh); 590 591 if(__predict_false(earlypkts < 100 || !rnd_initial_entropy)) { 592 rnd_add_data(NULL, eh, ehlen, 0); 593 earlypkts++; 594 } 595 596 /* 597 * Determine if the packet is within its size limits. 598 */ 599 if (etype != ETHERTYPE_MPLS && m->m_pkthdr.len > 600 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 601 mutex_enter(&bigpktpps_lock); 602 if (ppsratecheck(&bigpktppslim_last, &bigpktpps_count, 603 bigpktppslim)) { 604 printf("%s: discarding oversize frame (len=%d)\n", 605 ifp->if_xname, m->m_pkthdr.len); 606 } 607 mutex_exit(&bigpktpps_lock); 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 NCARP > 0 641 if (__predict_false(ifp->if_carp && ifp->if_type != IFT_CARP)) { 642 /* 643 * clear M_PROMISC, in case the packets comes from a 644 * vlan 645 */ 646 m->m_flags &= ~M_PROMISC; 647 if (carp_input(m, (uint8_t *)&eh->ether_shost, 648 (uint8_t *)&eh->ether_dhost, eh->ether_type) == 0) 649 return; 650 } 651 #endif /* NCARP > 0 */ 652 if ((m->m_flags & (M_BCAST|M_MCAST|M_PROMISC)) == 0 && 653 (ifp->if_flags & IFF_PROMISC) != 0 && 654 memcmp(CLLADDR(ifp->if_sadl), eh->ether_dhost, 655 ETHER_ADDR_LEN) != 0) { 656 m->m_flags |= M_PROMISC; 657 } 658 659 if ((m->m_flags & M_PROMISC) == 0) { 660 if (pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 661 return; 662 if (m == NULL) 663 return; 664 665 eh = mtod(m, struct ether_header *); 666 etype = ntohs(eh->ether_type); 667 ehlen = sizeof(*eh); 668 } 669 670 #if NAGR > 0 671 if (ifp->if_agrprivate && 672 __predict_true(etype != ETHERTYPE_SLOWPROTOCOLS)) { 673 m->m_flags &= ~M_PROMISC; 674 agr_input(ifp, m); 675 return; 676 } 677 #endif /* NAGR > 0 */ 678 679 /* 680 * If VLANs are configured on the interface, check to 681 * see if the device performed the decapsulation and 682 * provided us with the tag. 683 */ 684 if (ec->ec_nvlans && m_tag_find(m, PACKET_TAG_VLAN, NULL) != NULL) { 685 #if NVLAN > 0 686 /* 687 * vlan_input() will either recursively call ether_input() 688 * or drop the packet. 689 */ 690 vlan_input(ifp, m); 691 #else 692 m_freem(m); 693 #endif 694 return; 695 } 696 697 /* 698 * Handle protocols that expect to have the Ethernet header 699 * (and possibly FCS) intact. 700 */ 701 switch (etype) { 702 case ETHERTYPE_VLAN: { 703 struct ether_vlan_header *evl = (void *)eh; 704 /* 705 * If there is a tag of 0, then the VLAN header was probably 706 * just being used to store the priority. Extract the ether 707 * type, and if IP or IPV6, let them deal with it. 708 */ 709 if (m->m_len <= sizeof(*evl) 710 && EVL_VLANOFTAG(evl->evl_tag) == 0) { 711 etype = ntohs(evl->evl_proto); 712 ehlen = sizeof(*evl); 713 if ((m->m_flags & M_PROMISC) == 0 714 && (etype == ETHERTYPE_IP 715 || etype == ETHERTYPE_IPV6)) 716 break; 717 } 718 #if NVLAN > 0 719 /* 720 * vlan_input() will either recursively call ether_input() 721 * or drop the packet. 722 */ 723 if (((struct ethercom *)ifp)->ec_nvlans != 0) 724 vlan_input(ifp, m); 725 else 726 #endif /* NVLAN > 0 */ 727 m_freem(m); 728 return; 729 } 730 #if NPPPOE > 0 731 case ETHERTYPE_PPPOEDISC: 732 pppoedisc_input(ifp, m); 733 return; 734 case ETHERTYPE_PPPOE: 735 pppoe_input(ifp, m); 736 return; 737 #endif /* NPPPOE > 0 */ 738 case ETHERTYPE_SLOWPROTOCOLS: { 739 uint8_t subtype; 740 741 #if defined(DIAGNOSTIC) 742 if (m->m_pkthdr.len < sizeof(*eh) + sizeof(subtype)) { 743 panic("ether_input: too short slow protocol packet"); 744 } 745 #endif 746 m_copydata(m, sizeof(*eh), sizeof(subtype), &subtype); 747 switch (subtype) { 748 #if NAGR > 0 749 case SLOWPROTOCOLS_SUBTYPE_LACP: 750 if (ifp->if_agrprivate) { 751 ieee8023ad_lacp_input(ifp, m); 752 return; 753 } 754 break; 755 756 case SLOWPROTOCOLS_SUBTYPE_MARKER: 757 if (ifp->if_agrprivate) { 758 ieee8023ad_marker_input(ifp, m); 759 return; 760 } 761 break; 762 #endif /* NAGR > 0 */ 763 default: 764 if (subtype == 0 || subtype > 10) { 765 /* illegal value */ 766 m_freem(m); 767 return; 768 } 769 /* unknown subtype */ 770 break; 771 } 772 /* FALLTHROUGH */ 773 } 774 default: 775 if (m->m_flags & M_PROMISC) { 776 m_freem(m); 777 return; 778 } 779 } 780 781 /* If the CRC is still on the packet, trim it off. */ 782 if (m->m_flags & M_HASFCS) { 783 m_adj(m, -ETHER_CRC_LEN); 784 m->m_flags &= ~M_HASFCS; 785 } 786 787 if (etype > ETHERMTU + sizeof (struct ether_header)) { 788 /* Strip off the Ethernet header. */ 789 m_adj(m, ehlen); 790 791 switch (etype) { 792 #ifdef INET 793 case ETHERTYPE_IP: 794 #ifdef GATEWAY 795 if (ipflow_fastforward(m)) 796 return; 797 #endif 798 pktq = ip_pktq; 799 break; 800 801 case ETHERTYPE_ARP: 802 isr = NETISR_ARP; 803 inq = &arpintrq; 804 break; 805 806 case ETHERTYPE_REVARP: 807 revarpinput(m); /* XXX queue? */ 808 return; 809 #endif 810 #ifdef INET6 811 case ETHERTYPE_IPV6: 812 if (__predict_false(!in6_present)) { 813 m_freem(m); 814 return; 815 } 816 #ifdef GATEWAY 817 if (ip6flow_fastforward(&m)) 818 return; 819 #endif 820 pktq = ip6_pktq; 821 break; 822 #endif 823 #ifdef NETATALK 824 case ETHERTYPE_ATALK: 825 isr = NETISR_ATALK; 826 inq = &atintrq1; 827 break; 828 case ETHERTYPE_AARP: 829 /* probably this should be done with a NETISR as well */ 830 aarpinput(ifp, m); /* XXX */ 831 return; 832 #endif /* NETATALK */ 833 #ifdef MPLS 834 case ETHERTYPE_MPLS: 835 isr = NETISR_MPLS; 836 inq = &mplsintrq; 837 break; 838 #endif 839 default: 840 m_freem(m); 841 return; 842 } 843 } else { 844 #if defined (LLC) || defined (NETATALK) 845 l = (struct llc *)(eh+1); 846 switch (l->llc_dsap) { 847 #ifdef NETATALK 848 case LLC_SNAP_LSAP: 849 switch (l->llc_control) { 850 case LLC_UI: 851 if (l->llc_ssap != LLC_SNAP_LSAP) { 852 goto dropanyway; 853 } 854 855 if (memcmp(&(l->llc_snap_org_code)[0], 856 at_org_code, sizeof(at_org_code)) == 0 && 857 ntohs(l->llc_snap_ether_type) == 858 ETHERTYPE_ATALK) { 859 inq = &atintrq2; 860 m_adj(m, sizeof(struct ether_header) 861 + sizeof(struct llc)); 862 isr = NETISR_ATALK; 863 break; 864 } 865 866 if (memcmp(&(l->llc_snap_org_code)[0], 867 aarp_org_code, 868 sizeof(aarp_org_code)) == 0 && 869 ntohs(l->llc_snap_ether_type) == 870 ETHERTYPE_AARP) { 871 m_adj( m, sizeof(struct ether_header) 872 + sizeof(struct llc)); 873 aarpinput(ifp, m); /* XXX */ 874 return; 875 } 876 877 default: 878 goto dropanyway; 879 } 880 break; 881 dropanyway: 882 #endif 883 default: 884 m_freem(m); 885 return; 886 } 887 #else /* ISO || LLC || NETATALK*/ 888 m_freem(m); 889 return; 890 #endif /* ISO || LLC || NETATALK*/ 891 } 892 893 if (__predict_true(pktq)) { 894 #ifdef NET_MPSAFE 895 const u_int h = curcpu()->ci_index; 896 #else 897 const uint32_t h = pktq_rps_hash(m); 898 #endif 899 if (__predict_false(!pktq_enqueue(pktq, m, h))) { 900 m_freem(m); 901 } 902 return; 903 } 904 905 if (__predict_false(!inq)) { 906 /* Should not happen. */ 907 m_freem(m); 908 return; 909 } 910 911 IFQ_LOCK(inq); 912 if (IF_QFULL(inq)) { 913 IF_DROP(inq); 914 IFQ_UNLOCK(inq); 915 m_freem(m); 916 } else { 917 IF_ENQUEUE(inq, m); 918 IFQ_UNLOCK(inq); 919 schednetisr(isr); 920 } 921 } 922 923 /* 924 * Convert Ethernet address to printable (loggable) representation. 925 */ 926 char * 927 ether_sprintf(const u_char *ap) 928 { 929 static char etherbuf[3 * ETHER_ADDR_LEN]; 930 return ether_snprintf(etherbuf, sizeof(etherbuf), ap); 931 } 932 933 char * 934 ether_snprintf(char *buf, size_t len, const u_char *ap) 935 { 936 char *cp = buf; 937 size_t i; 938 939 for (i = 0; i < len / 3; i++) { 940 *cp++ = hexdigits[*ap >> 4]; 941 *cp++ = hexdigits[*ap++ & 0xf]; 942 *cp++ = ':'; 943 } 944 *--cp = '\0'; 945 return buf; 946 } 947 948 /* 949 * Perform common duties while attaching to interface list 950 */ 951 void 952 ether_ifattach(struct ifnet *ifp, const uint8_t *lla) 953 { 954 struct ethercom *ec = (struct ethercom *)ifp; 955 956 ifp->if_extflags |= IFEF_OUTPUT_MPSAFE; 957 ifp->if_type = IFT_ETHER; 958 ifp->if_hdrlen = ETHER_HDR_LEN; 959 ifp->if_dlt = DLT_EN10MB; 960 ifp->if_mtu = ETHERMTU; 961 ifp->if_output = ether_output; 962 ifp->_if_input = ether_input; 963 if (ifp->if_baudrate == 0) 964 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 965 966 if (lla != NULL) 967 if_set_sadl(ifp, lla, ETHER_ADDR_LEN, !ETHER_IS_LOCAL(lla)); 968 969 LIST_INIT(&ec->ec_multiaddrs); 970 ec->ec_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_NONE); 971 ifp->if_broadcastaddr = etherbroadcastaddr; 972 bpf_attach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 973 #ifdef MBUFTRACE 974 strlcpy(ec->ec_tx_mowner.mo_name, ifp->if_xname, 975 sizeof(ec->ec_tx_mowner.mo_name)); 976 strlcpy(ec->ec_tx_mowner.mo_descr, "tx", 977 sizeof(ec->ec_tx_mowner.mo_descr)); 978 strlcpy(ec->ec_rx_mowner.mo_name, ifp->if_xname, 979 sizeof(ec->ec_rx_mowner.mo_name)); 980 strlcpy(ec->ec_rx_mowner.mo_descr, "rx", 981 sizeof(ec->ec_rx_mowner.mo_descr)); 982 MOWNER_ATTACH(&ec->ec_tx_mowner); 983 MOWNER_ATTACH(&ec->ec_rx_mowner); 984 ifp->if_mowner = &ec->ec_tx_mowner; 985 #endif 986 } 987 988 void 989 ether_ifdetach(struct ifnet *ifp) 990 { 991 struct ethercom *ec = (void *) ifp; 992 struct ether_multi *enm; 993 int s; 994 995 /* 996 * Prevent further calls to ioctl (for example turning off 997 * promiscuous mode from the bridge code), which eventually can 998 * call if_init() which can cause panics because the interface 999 * is in the process of being detached. Return device not configured 1000 * instead. 1001 */ 1002 ifp->if_ioctl = (int (*)(struct ifnet *, u_long, void *))enxio; 1003 1004 #if NBRIDGE > 0 1005 if (ifp->if_bridge) 1006 bridge_ifdetach(ifp); 1007 #endif 1008 1009 bpf_detach(ifp); 1010 1011 #if NVLAN > 0 1012 if (ec->ec_nvlans) 1013 vlan_ifdetach(ifp); 1014 #endif 1015 1016 s = splnet(); 1017 mutex_enter(ec->ec_lock); 1018 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1019 LIST_REMOVE(enm, enm_list); 1020 kmem_free(enm, sizeof(*enm)); 1021 ec->ec_multicnt--; 1022 } 1023 mutex_exit(ec->ec_lock); 1024 splx(s); 1025 1026 mutex_destroy(ec->ec_lock); 1027 1028 ifp->if_mowner = NULL; 1029 MOWNER_DETACH(&ec->ec_rx_mowner); 1030 MOWNER_DETACH(&ec->ec_tx_mowner); 1031 } 1032 1033 #if 0 1034 /* 1035 * This is for reference. We have a table-driven version 1036 * of the little-endian crc32 generator, which is faster 1037 * than the double-loop. 1038 */ 1039 uint32_t 1040 ether_crc32_le(const uint8_t *buf, size_t len) 1041 { 1042 uint32_t c, crc, carry; 1043 size_t i, j; 1044 1045 crc = 0xffffffffU; /* initial value */ 1046 1047 for (i = 0; i < len; i++) { 1048 c = buf[i]; 1049 for (j = 0; j < 8; j++) { 1050 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1051 crc >>= 1; 1052 c >>= 1; 1053 if (carry) 1054 crc = (crc ^ ETHER_CRC_POLY_LE); 1055 } 1056 } 1057 1058 return (crc); 1059 } 1060 #else 1061 uint32_t 1062 ether_crc32_le(const uint8_t *buf, size_t len) 1063 { 1064 static const uint32_t crctab[] = { 1065 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1066 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1067 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1068 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1069 }; 1070 uint32_t crc; 1071 size_t i; 1072 1073 crc = 0xffffffffU; /* initial value */ 1074 1075 for (i = 0; i < len; i++) { 1076 crc ^= buf[i]; 1077 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1078 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1079 } 1080 1081 return (crc); 1082 } 1083 #endif 1084 1085 uint32_t 1086 ether_crc32_be(const uint8_t *buf, size_t len) 1087 { 1088 uint32_t c, crc, carry; 1089 size_t i, j; 1090 1091 crc = 0xffffffffU; /* initial value */ 1092 1093 for (i = 0; i < len; i++) { 1094 c = buf[i]; 1095 for (j = 0; j < 8; j++) { 1096 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1097 crc <<= 1; 1098 c >>= 1; 1099 if (carry) 1100 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1101 } 1102 } 1103 1104 return (crc); 1105 } 1106 1107 #ifdef INET 1108 const uint8_t ether_ipmulticast_min[ETHER_ADDR_LEN] = 1109 { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1110 const uint8_t ether_ipmulticast_max[ETHER_ADDR_LEN] = 1111 { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1112 #endif 1113 #ifdef INET6 1114 const uint8_t ether_ip6multicast_min[ETHER_ADDR_LEN] = 1115 { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1116 const uint8_t ether_ip6multicast_max[ETHER_ADDR_LEN] = 1117 { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1118 #endif 1119 1120 /* 1121 * ether_aton implementation, not using a static buffer. 1122 */ 1123 int 1124 ether_aton_r(u_char *dest, size_t len, const char *str) 1125 { 1126 const u_char *cp = (const void *)str; 1127 u_char *ep; 1128 1129 #define atox(c) (((c) <= '9') ? ((c) - '0') : ((toupper(c) - 'A') + 10)) 1130 1131 if (len < ETHER_ADDR_LEN) 1132 return ENOSPC; 1133 1134 ep = dest + ETHER_ADDR_LEN; 1135 1136 while (*cp) { 1137 if (!isxdigit(*cp)) 1138 return EINVAL; 1139 *dest = atox(*cp); 1140 cp++; 1141 if (isxdigit(*cp)) { 1142 *dest = (*dest << 4) | atox(*cp); 1143 dest++; 1144 cp++; 1145 } else 1146 dest++; 1147 if (dest == ep) 1148 return *cp == '\0' ? 0 : ENAMETOOLONG; 1149 switch (*cp) { 1150 case ':': 1151 case '-': 1152 case '.': 1153 cp++; 1154 break; 1155 } 1156 } 1157 return ENOBUFS; 1158 } 1159 1160 /* 1161 * Convert a sockaddr into an Ethernet address or range of Ethernet 1162 * addresses. 1163 */ 1164 int 1165 ether_multiaddr(const struct sockaddr *sa, uint8_t addrlo[ETHER_ADDR_LEN], 1166 uint8_t addrhi[ETHER_ADDR_LEN]) 1167 { 1168 #ifdef INET 1169 const struct sockaddr_in *sin; 1170 #endif /* INET */ 1171 #ifdef INET6 1172 const struct sockaddr_in6 *sin6; 1173 #endif /* INET6 */ 1174 1175 switch (sa->sa_family) { 1176 1177 case AF_UNSPEC: 1178 memcpy(addrlo, sa->sa_data, ETHER_ADDR_LEN); 1179 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1180 break; 1181 1182 #ifdef INET 1183 case AF_INET: 1184 sin = satocsin(sa); 1185 if (sin->sin_addr.s_addr == INADDR_ANY) { 1186 /* 1187 * An IP address of INADDR_ANY means listen to 1188 * or stop listening to all of the Ethernet 1189 * multicast addresses used for IP. 1190 * (This is for the sake of IP multicast routers.) 1191 */ 1192 memcpy(addrlo, ether_ipmulticast_min, ETHER_ADDR_LEN); 1193 memcpy(addrhi, ether_ipmulticast_max, ETHER_ADDR_LEN); 1194 } 1195 else { 1196 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1197 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1198 } 1199 break; 1200 #endif 1201 #ifdef INET6 1202 case AF_INET6: 1203 sin6 = satocsin6(sa); 1204 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1205 /* 1206 * An IP6 address of 0 means listen to or stop 1207 * listening to all of the Ethernet multicast 1208 * address used for IP6. 1209 * (This is used for multicast routers.) 1210 */ 1211 memcpy(addrlo, ether_ip6multicast_min, ETHER_ADDR_LEN); 1212 memcpy(addrhi, ether_ip6multicast_max, ETHER_ADDR_LEN); 1213 } else { 1214 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1215 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1216 } 1217 break; 1218 #endif 1219 1220 default: 1221 return EAFNOSUPPORT; 1222 } 1223 return 0; 1224 } 1225 1226 /* 1227 * Add an Ethernet multicast address or range of addresses to the list for a 1228 * given interface. 1229 */ 1230 int 1231 ether_addmulti(const struct sockaddr *sa, struct ethercom *ec) 1232 { 1233 struct ether_multi *enm, *_enm; 1234 u_char addrlo[ETHER_ADDR_LEN]; 1235 u_char addrhi[ETHER_ADDR_LEN]; 1236 int s, error = 0; 1237 1238 /* Allocate out of lock */ 1239 /* XXX still can be called in softint */ 1240 enm = kmem_intr_alloc(sizeof(*enm), KM_SLEEP); 1241 if (enm == NULL) 1242 return ENOBUFS; 1243 1244 s = splnet(); 1245 mutex_enter(ec->ec_lock); 1246 error = ether_multiaddr(sa, addrlo, addrhi); 1247 if (error != 0) 1248 goto out; 1249 1250 /* 1251 * Verify that we have valid Ethernet multicast addresses. 1252 */ 1253 if (!ETHER_IS_MULTICAST(addrlo) || !ETHER_IS_MULTICAST(addrhi)) { 1254 error = EINVAL; 1255 goto out; 1256 } 1257 /* 1258 * See if the address range is already in the list. 1259 */ 1260 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, _enm); 1261 if (_enm != NULL) { 1262 /* 1263 * Found it; just increment the reference count. 1264 */ 1265 ++_enm->enm_refcount; 1266 error = 0; 1267 goto out; 1268 } 1269 /* 1270 * New address or range; malloc a new multicast record 1271 * and link it into the interface's multicast list. 1272 */ 1273 memcpy(enm->enm_addrlo, addrlo, 6); 1274 memcpy(enm->enm_addrhi, addrhi, 6); 1275 enm->enm_refcount = 1; 1276 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1277 ec->ec_multicnt++; 1278 /* 1279 * Return ENETRESET to inform the driver that the list has changed 1280 * and its reception filter should be adjusted accordingly. 1281 */ 1282 error = ENETRESET; 1283 enm = NULL; 1284 out: 1285 mutex_exit(ec->ec_lock); 1286 splx(s); 1287 if (enm != NULL) 1288 kmem_free(enm, sizeof(*enm)); 1289 return error; 1290 } 1291 1292 /* 1293 * Delete a multicast address record. 1294 */ 1295 int 1296 ether_delmulti(const struct sockaddr *sa, struct ethercom *ec) 1297 { 1298 struct ether_multi *enm; 1299 u_char addrlo[ETHER_ADDR_LEN]; 1300 u_char addrhi[ETHER_ADDR_LEN]; 1301 int s, error; 1302 1303 s = splnet(); 1304 mutex_enter(ec->ec_lock); 1305 error = ether_multiaddr(sa, addrlo, addrhi); 1306 if (error != 0) 1307 goto error; 1308 1309 /* 1310 * Look ur the address in our list. 1311 */ 1312 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1313 if (enm == NULL) { 1314 error = ENXIO; 1315 goto error; 1316 } 1317 if (--enm->enm_refcount != 0) { 1318 /* 1319 * Still some claims to this record. 1320 */ 1321 error = 0; 1322 goto error; 1323 } 1324 /* 1325 * No remaining claims to this record; unlink and free it. 1326 */ 1327 LIST_REMOVE(enm, enm_list); 1328 ec->ec_multicnt--; 1329 mutex_exit(ec->ec_lock); 1330 splx(s); 1331 1332 kmem_free(enm, sizeof(*enm)); 1333 /* 1334 * Return ENETRESET to inform the driver that the list has changed 1335 * and its reception filter should be adjusted accordingly. 1336 */ 1337 return ENETRESET; 1338 error: 1339 mutex_exit(ec->ec_lock); 1340 splx(s); 1341 return error; 1342 } 1343 1344 void 1345 ether_set_ifflags_cb(struct ethercom *ec, ether_cb_t cb) 1346 { 1347 ec->ec_ifflags_cb = cb; 1348 } 1349 1350 /* 1351 * Common ioctls for Ethernet interfaces. Note, we must be 1352 * called at splnet(). 1353 */ 1354 int 1355 ether_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1356 { 1357 struct ethercom *ec = (void *) ifp; 1358 struct eccapreq *eccr; 1359 struct ifreq *ifr = (struct ifreq *)data; 1360 struct if_laddrreq *iflr = data; 1361 const struct sockaddr_dl *sdl; 1362 static const uint8_t zero[ETHER_ADDR_LEN]; 1363 int error; 1364 1365 switch (cmd) { 1366 case SIOCINITIFADDR: 1367 { 1368 struct ifaddr *ifa = (struct ifaddr *)data; 1369 if (ifa->ifa_addr->sa_family != AF_LINK 1370 && (ifp->if_flags & (IFF_UP|IFF_RUNNING)) != 1371 (IFF_UP|IFF_RUNNING)) { 1372 ifp->if_flags |= IFF_UP; 1373 if ((error = (*ifp->if_init)(ifp)) != 0) 1374 return error; 1375 } 1376 #ifdef INET 1377 if (ifa->ifa_addr->sa_family == AF_INET) 1378 arp_ifinit(ifp, ifa); 1379 #endif /* INET */ 1380 return 0; 1381 } 1382 1383 case SIOCSIFMTU: 1384 { 1385 int maxmtu; 1386 1387 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1388 maxmtu = ETHERMTU_JUMBO; 1389 else 1390 maxmtu = ETHERMTU; 1391 1392 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1393 return EINVAL; 1394 else if ((error = ifioctl_common(ifp, cmd, data)) != ENETRESET) 1395 return error; 1396 else if (ifp->if_flags & IFF_UP) { 1397 /* Make sure the device notices the MTU change. */ 1398 return (*ifp->if_init)(ifp); 1399 } else 1400 return 0; 1401 } 1402 1403 case SIOCSIFFLAGS: 1404 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1405 return error; 1406 switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) { 1407 case IFF_RUNNING: 1408 /* 1409 * If interface is marked down and it is running, 1410 * then stop and disable it. 1411 */ 1412 (*ifp->if_stop)(ifp, 1); 1413 break; 1414 case IFF_UP: 1415 /* 1416 * If interface is marked up and it is stopped, then 1417 * start it. 1418 */ 1419 return (*ifp->if_init)(ifp); 1420 case IFF_UP|IFF_RUNNING: 1421 error = 0; 1422 if (ec->ec_ifflags_cb == NULL || 1423 (error = (*ec->ec_ifflags_cb)(ec)) == ENETRESET) { 1424 /* 1425 * Reset the interface to pick up 1426 * changes in any other flags that 1427 * affect the hardware state. 1428 */ 1429 return (*ifp->if_init)(ifp); 1430 } else 1431 return error; 1432 case 0: 1433 break; 1434 } 1435 return 0; 1436 case SIOCGETHERCAP: 1437 eccr = (struct eccapreq *)data; 1438 eccr->eccr_capabilities = ec->ec_capabilities; 1439 eccr->eccr_capenable = ec->ec_capenable; 1440 return 0; 1441 case SIOCADDMULTI: 1442 return ether_addmulti(ifreq_getaddr(cmd, ifr), ec); 1443 case SIOCDELMULTI: 1444 return ether_delmulti(ifreq_getaddr(cmd, ifr), ec); 1445 case SIOCSIFMEDIA: 1446 case SIOCGIFMEDIA: 1447 if (ec->ec_mii == NULL) 1448 return ENOTTY; 1449 return ifmedia_ioctl(ifp, ifr, &ec->ec_mii->mii_media, cmd); 1450 case SIOCALIFADDR: 1451 sdl = satocsdl(sstocsa(&iflr->addr)); 1452 if (sdl->sdl_family != AF_LINK) 1453 ; 1454 else if (ETHER_IS_MULTICAST(CLLADDR(sdl))) 1455 return EINVAL; 1456 else if (memcmp(zero, CLLADDR(sdl), sizeof(zero)) == 0) 1457 return EINVAL; 1458 /*FALLTHROUGH*/ 1459 default: 1460 return ifioctl_common(ifp, cmd, data); 1461 } 1462 return 0; 1463 } 1464 1465 /* 1466 * Enable/disable passing VLAN packets if the parent interface supports it. 1467 * Return: 1468 * 0: Ok 1469 * -1: Parent interface does not support vlans 1470 * >0: Error 1471 */ 1472 int 1473 ether_enable_vlan_mtu(struct ifnet *ifp) 1474 { 1475 int error; 1476 struct ethercom *ec = (void *)ifp; 1477 1478 /* Already have VLAN's do nothing. */ 1479 if (ec->ec_nvlans != 0) 1480 return 0; 1481 1482 /* Parent does not support VLAN's */ 1483 if ((ec->ec_capabilities & ETHERCAP_VLAN_MTU) == 0) 1484 return -1; 1485 1486 /* 1487 * Parent supports the VLAN_MTU capability, 1488 * i.e. can Tx/Rx larger than ETHER_MAX_LEN frames; 1489 * enable it. 1490 */ 1491 ec->ec_capenable |= ETHERCAP_VLAN_MTU; 1492 1493 /* Interface is down, defer for later */ 1494 if ((ifp->if_flags & IFF_UP) == 0) 1495 return 0; 1496 1497 if ((error = if_flags_set(ifp, ifp->if_flags)) == 0) 1498 return 0; 1499 1500 ec->ec_capenable &= ~ETHERCAP_VLAN_MTU; 1501 return error; 1502 } 1503 1504 int 1505 ether_disable_vlan_mtu(struct ifnet *ifp) 1506 { 1507 int error; 1508 struct ethercom *ec = (void *)ifp; 1509 1510 /* We still have VLAN's, defer for later */ 1511 if (ec->ec_nvlans != 0) 1512 return 0; 1513 1514 /* Parent does not support VLAB's, nothing to do. */ 1515 if ((ec->ec_capenable & ETHERCAP_VLAN_MTU) == 0) 1516 return -1; 1517 1518 /* 1519 * Disable Tx/Rx of VLAN-sized frames. 1520 */ 1521 ec->ec_capenable &= ~ETHERCAP_VLAN_MTU; 1522 1523 /* Interface is down, defer for later */ 1524 if ((ifp->if_flags & IFF_UP) == 0) 1525 return 0; 1526 1527 if ((error = if_flags_set(ifp, ifp->if_flags)) == 0) 1528 return 0; 1529 1530 ec->ec_capenable |= ETHERCAP_VLAN_MTU; 1531 return error; 1532 } 1533 1534 static int 1535 ether_multicast_sysctl(SYSCTLFN_ARGS) 1536 { 1537 struct ether_multi *enm; 1538 struct ether_multi_sysctl addr; 1539 struct ifnet *ifp; 1540 struct ethercom *ec; 1541 int error = 0; 1542 size_t written; 1543 struct psref psref; 1544 int bound, s; 1545 1546 if (namelen != 1) 1547 return EINVAL; 1548 1549 bound = curlwp_bind(); 1550 ifp = if_get_byindex(name[0], &psref); 1551 if (ifp == NULL) { 1552 error = ENODEV; 1553 goto out; 1554 } 1555 if (ifp->if_type != IFT_ETHER) { 1556 if_put(ifp, &psref); 1557 *oldlenp = 0; 1558 goto out; 1559 } 1560 ec = (struct ethercom *)ifp; 1561 1562 if (oldp == NULL) { 1563 if_put(ifp, &psref); 1564 *oldlenp = ec->ec_multicnt * sizeof(addr); 1565 goto out; 1566 } 1567 1568 memset(&addr, 0, sizeof(addr)); 1569 error = 0; 1570 written = 0; 1571 1572 s = splnet(); 1573 mutex_enter(ec->ec_lock); 1574 LIST_FOREACH(enm, &ec->ec_multiaddrs, enm_list) { 1575 if (written + sizeof(addr) > *oldlenp) 1576 break; 1577 addr.enm_refcount = enm->enm_refcount; 1578 memcpy(addr.enm_addrlo, enm->enm_addrlo, ETHER_ADDR_LEN); 1579 memcpy(addr.enm_addrhi, enm->enm_addrhi, ETHER_ADDR_LEN); 1580 error = sysctl_copyout(l, &addr, oldp, sizeof(addr)); 1581 if (error) 1582 break; 1583 written += sizeof(addr); 1584 oldp = (char *)oldp + sizeof(addr); 1585 } 1586 mutex_exit(ec->ec_lock); 1587 splx(s); 1588 if_put(ifp, &psref); 1589 1590 *oldlenp = written; 1591 out: 1592 curlwp_bindx(bound); 1593 return error; 1594 } 1595 1596 SYSCTL_SETUP(sysctl_net_ether_setup, "sysctl net.ether subtree setup") 1597 { 1598 const struct sysctlnode *rnode = NULL; 1599 1600 sysctl_createv(clog, 0, NULL, &rnode, 1601 CTLFLAG_PERMANENT, 1602 CTLTYPE_NODE, "ether", 1603 SYSCTL_DESCR("Ethernet-specific information"), 1604 NULL, 0, NULL, 0, 1605 CTL_NET, CTL_CREATE, CTL_EOL); 1606 1607 sysctl_createv(clog, 0, &rnode, NULL, 1608 CTLFLAG_PERMANENT, 1609 CTLTYPE_NODE, "multicast", 1610 SYSCTL_DESCR("multicast addresses"), 1611 ether_multicast_sysctl, 0, NULL, 0, 1612 CTL_CREATE, CTL_EOL); 1613 } 1614 1615 void 1616 etherinit(void) 1617 { 1618 mutex_init(&bigpktpps_lock, MUTEX_DEFAULT, IPL_NET); 1619 } 1620
Indexes created Sun Sep 21 18:09:52 GMT 2025