if_ethersubr.c revision 1.224
1 /* $NetBSD: if_ethersubr.c,v 1.224 2016/06/20 07:01:45 knakahara 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 1.224 2016/06/20 07:01:45 knakahara 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 KASSERT(ifp->if_extflags & IFEF_OUTPUT_MPSAFE); 208 209 #ifdef MBUFTRACE 210 m_claimm(m, ifp->if_mowner); 211 #endif 212 213 #if NCARP > 0 214 if (ifp->if_type == IFT_CARP) { 215 struct ifaddr *ifa; 216 217 /* loop back if this is going to the carp interface */ 218 if (dst != NULL && ifp0->if_link_state == LINK_STATE_UP && 219 (ifa = ifa_ifwithaddr(dst)) != NULL && 220 ifa->ifa_ifp == ifp0) 221 return looutput(ifp0, m, dst, rt); 222 223 ifp = ifp->if_carpdev; 224 /* ac = (struct arpcom *)ifp; */ 225 226 if ((ifp0->if_flags & (IFF_UP|IFF_RUNNING)) != 227 (IFF_UP|IFF_RUNNING)) 228 senderr(ENETDOWN); 229 } 230 #endif /* NCARP > 0 */ 231 232 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 233 senderr(ENETDOWN); 234 235 switch (dst->sa_family) { 236 237 #ifdef INET 238 case AF_INET: 239 KERNEL_LOCK(1, NULL); 240 if (m->m_flags & M_BCAST) 241 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 242 else if (m->m_flags & M_MCAST) 243 ETHER_MAP_IP_MULTICAST(&satocsin(dst)->sin_addr, edst); 244 else if ((error = arpresolve(ifp, rt, m, dst, edst, 245 sizeof(edst))) != 0) { 246 KERNEL_UNLOCK_ONE(NULL); 247 return error == EWOULDBLOCK ? 0 : error; 248 } 249 KERNEL_UNLOCK_ONE(NULL); 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 return 0; 266 } 267 memcpy(edst, tha, sizeof(edst)); 268 } 269 270 ah->ar_hrd = htons(ARPHRD_ETHER); 271 272 switch (ntohs(ah->ar_op)) { 273 case ARPOP_REVREQUEST: 274 case ARPOP_REVREPLY: 275 etype = htons(ETHERTYPE_REVARP); 276 break; 277 278 case ARPOP_REQUEST: 279 case ARPOP_REPLY: 280 default: 281 etype = htons(ETHERTYPE_ARP); 282 } 283 284 break; 285 #endif 286 #ifdef INET6 287 case AF_INET6: 288 if (!nd6_storelladdr(ifp, rt, m, dst, edst, sizeof(edst))){ 289 /* something bad happened */ 290 return (0); 291 } 292 etype = htons(ETHERTYPE_IPV6); 293 break; 294 #endif 295 #ifdef NETATALK 296 case AF_APPLETALK: 297 KERNEL_LOCK(1, NULL); 298 if (aarpresolve(ifp, m, (const struct sockaddr_at *)dst, edst)) { 299 #ifdef NETATALKDEBUG 300 printf("aarpresolv failed\n"); 301 #endif /* NETATALKDEBUG */ 302 KERNEL_UNLOCK_ONE(NULL); 303 return (0); 304 } 305 /* 306 * ifaddr is the first thing in at_ifaddr 307 */ 308 aa = (struct at_ifaddr *) at_ifawithnet( 309 (const struct sockaddr_at *)dst, ifp); 310 if (aa == NULL) { 311 KERNEL_UNLOCK_ONE(NULL); 312 goto bad; 313 } 314 315 /* 316 * In the phase 2 case, we need to prepend an mbuf for the 317 * llc header. Since we must preserve the value of m, 318 * which is passed to us by value, we m_copy() the first 319 * mbuf, and use it for our llc header. 320 */ 321 if (aa->aa_flags & AFA_PHASE2) { 322 struct llc llc; 323 324 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 325 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 326 llc.llc_control = LLC_UI; 327 memcpy(llc.llc_snap_org_code, at_org_code, 328 sizeof(llc.llc_snap_org_code)); 329 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 330 memcpy(mtod(m, void *), &llc, sizeof(struct llc)); 331 } else { 332 etype = htons(ETHERTYPE_ATALK); 333 } 334 KERNEL_UNLOCK_ONE(NULL); 335 break; 336 #endif /* NETATALK */ 337 case pseudo_AF_HDRCMPLT: 338 hdrcmplt = 1; 339 memcpy(esrc, 340 ((const struct ether_header *)dst->sa_data)->ether_shost, 341 sizeof(esrc)); 342 /* FALLTHROUGH */ 343 344 case AF_UNSPEC: 345 memcpy(edst, 346 ((const struct ether_header *)dst->sa_data)->ether_dhost, 347 sizeof(edst)); 348 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 349 etype = ((const struct ether_header *)dst->sa_data)->ether_type; 350 break; 351 352 default: 353 printf("%s: can't handle af%d\n", ifp->if_xname, 354 dst->sa_family); 355 senderr(EAFNOSUPPORT); 356 } 357 358 #ifdef MPLS 359 KERNEL_LOCK(1, NULL); 360 { 361 struct m_tag *mtag; 362 mtag = m_tag_find(m, PACKET_TAG_MPLS, NULL); 363 if (mtag != NULL) { 364 /* Having the tag itself indicates it's MPLS */ 365 etype = htons(ETHERTYPE_MPLS); 366 m_tag_delete(m, mtag); 367 } 368 } 369 KERNEL_UNLOCK_ONE(NULL); 370 #endif 371 372 if (mcopy) 373 (void)looutput(ifp, mcopy, dst, rt); 374 375 /* If no ether type is set, this must be a 802.2 formatted packet. 376 */ 377 if (etype == 0) 378 etype = htons(m->m_pkthdr.len); 379 /* 380 * Add local net header. If no space in first mbuf, 381 * allocate another. 382 */ 383 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 384 if (m == 0) 385 senderr(ENOBUFS); 386 eh = mtod(m, struct ether_header *); 387 /* Note: etype is already in network byte order. */ 388 (void)memcpy(&eh->ether_type, &etype, sizeof(eh->ether_type)); 389 memcpy(eh->ether_dhost, edst, sizeof(edst)); 390 if (hdrcmplt) 391 memcpy(eh->ether_shost, esrc, sizeof(eh->ether_shost)); 392 else 393 memcpy(eh->ether_shost, CLLADDR(ifp->if_sadl), 394 sizeof(eh->ether_shost)); 395 396 #if NCARP > 0 397 if (ifp0 != ifp && ifp0->if_type == IFT_CARP) { 398 memcpy(eh->ether_shost, CLLADDR(ifp0->if_sadl), 399 sizeof(eh->ether_shost)); 400 } 401 #endif /* NCARP > 0 */ 402 403 if ((error = pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 404 return (error); 405 if (m == NULL) 406 return (0); 407 408 #if NBRIDGE > 0 409 /* 410 * Bridges require special output handling. 411 */ 412 if (ifp->if_bridge) 413 return (bridge_output(ifp, m, NULL, NULL)); 414 #endif 415 416 #if NCARP > 0 417 if (ifp != ifp0) 418 ifp0->if_obytes += m->m_pkthdr.len + ETHER_HDR_LEN; 419 #endif /* NCARP > 0 */ 420 421 #ifdef ALTQ 422 KERNEL_LOCK(1, NULL); 423 /* 424 * If ALTQ is enabled on the parent interface, do 425 * classification; the queueing discipline might not 426 * require classification, but might require the 427 * address family/header pointer in the pktattr. 428 */ 429 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 430 altq_etherclassify(&ifp->if_snd, m); 431 KERNEL_UNLOCK_ONE(NULL); 432 #endif 433 return ifq_enqueue(ifp, m); 434 435 bad: 436 if (m) 437 m_freem(m); 438 return (error); 439 } 440 441 #ifdef ALTQ 442 /* 443 * This routine is a slight hack to allow a packet to be classified 444 * if the Ethernet headers are present. It will go away when ALTQ's 445 * classification engine understands link headers. 446 */ 447 void 448 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m) 449 { 450 struct ether_header *eh; 451 uint16_t ether_type; 452 int hlen, af, hdrsize; 453 void *hdr; 454 455 hlen = ETHER_HDR_LEN; 456 eh = mtod(m, struct ether_header *); 457 458 ether_type = htons(eh->ether_type); 459 460 if (ether_type < ETHERMTU) { 461 /* LLC/SNAP */ 462 struct llc *llc = (struct llc *)(eh + 1); 463 hlen += 8; 464 465 if (m->m_len < hlen || 466 llc->llc_dsap != LLC_SNAP_LSAP || 467 llc->llc_ssap != LLC_SNAP_LSAP || 468 llc->llc_control != LLC_UI) { 469 /* Not SNAP. */ 470 goto bad; 471 } 472 473 ether_type = htons(llc->llc_un.type_snap.ether_type); 474 } 475 476 switch (ether_type) { 477 case ETHERTYPE_IP: 478 af = AF_INET; 479 hdrsize = 20; /* sizeof(struct ip) */ 480 break; 481 482 case ETHERTYPE_IPV6: 483 af = AF_INET6; 484 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 485 break; 486 487 default: 488 af = AF_UNSPEC; 489 hdrsize = 0; 490 break; 491 } 492 493 while (m->m_len <= hlen) { 494 hlen -= m->m_len; 495 m = m->m_next; 496 } 497 if (m->m_len < (hlen + hdrsize)) { 498 /* 499 * protocol header not in a single mbuf. 500 * We can't cope with this situation right 501 * now (but it shouldn't ever happen, really, anyhow). 502 */ 503 #ifdef DEBUG 504 printf("altq_etherclassify: headers span multiple mbufs: " 505 "%d < %d\n", m->m_len, (hlen + hdrsize)); 506 #endif 507 goto bad; 508 } 509 510 m->m_data += hlen; 511 m->m_len -= hlen; 512 513 hdr = mtod(m, void *); 514 515 if (ALTQ_NEEDS_CLASSIFY(ifq)) 516 m->m_pkthdr.pattr_class = 517 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 518 m->m_pkthdr.pattr_af = af; 519 m->m_pkthdr.pattr_hdr = hdr; 520 521 m->m_data -= hlen; 522 m->m_len += hlen; 523 524 return; 525 526 bad: 527 m->m_pkthdr.pattr_class = NULL; 528 m->m_pkthdr.pattr_hdr = NULL; 529 m->m_pkthdr.pattr_af = AF_UNSPEC; 530 } 531 #endif /* ALTQ */ 532 533 /* 534 * Process a received Ethernet packet; 535 * the packet is in the mbuf chain m with 536 * the ether header. 537 */ 538 void 539 ether_input(struct ifnet *ifp, struct mbuf *m) 540 { 541 struct ethercom *ec = (struct ethercom *) ifp; 542 pktqueue_t *pktq = NULL; 543 struct ifqueue *inq = NULL; 544 uint16_t etype; 545 struct ether_header *eh; 546 size_t ehlen; 547 static int earlypkts; 548 int isr = 0; 549 #if defined (LLC) || defined(NETATALK) 550 struct llc *l; 551 #endif 552 553 KASSERT(!cpu_intr_p()); 554 555 if ((ifp->if_flags & IFF_UP) == 0) { 556 m_freem(m); 557 return; 558 } 559 560 #ifdef MBUFTRACE 561 m_claimm(m, &ec->ec_rx_mowner); 562 #endif 563 eh = mtod(m, struct ether_header *); 564 etype = ntohs(eh->ether_type); 565 ehlen = sizeof(*eh); 566 567 if(__predict_false(earlypkts < 100 || !rnd_initial_entropy)) { 568 rnd_add_data(NULL, eh, ehlen, 0); 569 earlypkts++; 570 } 571 572 /* 573 * Determine if the packet is within its size limits. 574 */ 575 if (etype != ETHERTYPE_MPLS && m->m_pkthdr.len > 576 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 577 mutex_enter(&bigpktpps_lock); 578 if (ppsratecheck(&bigpktppslim_last, &bigpktpps_count, 579 bigpktppslim)) { 580 printf("%s: discarding oversize frame (len=%d)\n", 581 ifp->if_xname, m->m_pkthdr.len); 582 } 583 mutex_exit(&bigpktpps_lock); 584 m_freem(m); 585 return; 586 } 587 588 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 589 /* 590 * If this is not a simplex interface, drop the packet 591 * if it came from us. 592 */ 593 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 594 memcmp(CLLADDR(ifp->if_sadl), eh->ether_shost, 595 ETHER_ADDR_LEN) == 0) { 596 m_freem(m); 597 return; 598 } 599 600 if (memcmp(etherbroadcastaddr, 601 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 602 m->m_flags |= M_BCAST; 603 else 604 m->m_flags |= M_MCAST; 605 ifp->if_imcasts++; 606 } 607 608 /* If the CRC is still on the packet, trim it off. */ 609 if (m->m_flags & M_HASFCS) { 610 m_adj(m, -ETHER_CRC_LEN); 611 m->m_flags &= ~M_HASFCS; 612 } 613 614 ifp->if_ibytes += m->m_pkthdr.len; 615 616 #if NCARP > 0 617 if (__predict_false(ifp->if_carp && ifp->if_type != IFT_CARP)) { 618 /* 619 * clear M_PROMISC, in case the packets comes from a 620 * vlan 621 */ 622 m->m_flags &= ~M_PROMISC; 623 if (carp_input(m, (uint8_t *)&eh->ether_shost, 624 (uint8_t *)&eh->ether_dhost, eh->ether_type) == 0) 625 return; 626 } 627 #endif /* NCARP > 0 */ 628 if ((m->m_flags & (M_BCAST|M_MCAST|M_PROMISC)) == 0 && 629 (ifp->if_flags & IFF_PROMISC) != 0 && 630 memcmp(CLLADDR(ifp->if_sadl), eh->ether_dhost, 631 ETHER_ADDR_LEN) != 0) { 632 m->m_flags |= M_PROMISC; 633 } 634 635 if ((m->m_flags & M_PROMISC) == 0) { 636 if (pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 637 return; 638 if (m == NULL) 639 return; 640 641 eh = mtod(m, struct ether_header *); 642 etype = ntohs(eh->ether_type); 643 ehlen = sizeof(*eh); 644 } 645 646 #if NAGR > 0 647 if (ifp->if_agrprivate && 648 __predict_true(etype != ETHERTYPE_SLOWPROTOCOLS)) { 649 m->m_flags &= ~M_PROMISC; 650 agr_input(ifp, m); 651 return; 652 } 653 #endif /* NAGR > 0 */ 654 655 /* 656 * If VLANs are configured on the interface, check to 657 * see if the device performed the decapsulation and 658 * provided us with the tag. 659 */ 660 if (ec->ec_nvlans && m_tag_find(m, PACKET_TAG_VLAN, NULL) != NULL) { 661 #if NVLAN > 0 662 /* 663 * vlan_input() will either recursively call ether_input() 664 * or drop the packet. 665 */ 666 vlan_input(ifp, m); 667 #else 668 m_freem(m); 669 #endif 670 return; 671 } 672 673 /* 674 * Handle protocols that expect to have the Ethernet header 675 * (and possibly FCS) intact. 676 */ 677 switch (etype) { 678 case ETHERTYPE_VLAN: { 679 struct ether_vlan_header *evl = (void *)eh; 680 /* 681 * If there is a tag of 0, then the VLAN header was probably 682 * just being used to store the priority. Extract the ether 683 * type, and if IP or IPV6, let them deal with it. 684 */ 685 if (m->m_len <= sizeof(*evl) 686 && EVL_VLANOFTAG(evl->evl_tag) == 0) { 687 etype = ntohs(evl->evl_proto); 688 ehlen = sizeof(*evl); 689 if ((m->m_flags & M_PROMISC) == 0 690 && (etype == ETHERTYPE_IP 691 || etype == ETHERTYPE_IPV6)) 692 break; 693 } 694 #if NVLAN > 0 695 /* 696 * vlan_input() will either recursively call ether_input() 697 * or drop the packet. 698 */ 699 if (((struct ethercom *)ifp)->ec_nvlans != 0) 700 vlan_input(ifp, m); 701 else 702 #endif /* NVLAN > 0 */ 703 m_freem(m); 704 return; 705 } 706 #if NPPPOE > 0 707 case ETHERTYPE_PPPOEDISC: 708 pppoedisc_input(ifp, m); 709 return; 710 case ETHERTYPE_PPPOE: 711 pppoe_input(ifp, m); 712 return; 713 #endif /* NPPPOE > 0 */ 714 case ETHERTYPE_SLOWPROTOCOLS: { 715 uint8_t subtype; 716 717 #if defined(DIAGNOSTIC) 718 if (m->m_pkthdr.len < sizeof(*eh) + sizeof(subtype)) { 719 panic("ether_input: too short slow protocol packet"); 720 } 721 #endif 722 m_copydata(m, sizeof(*eh), sizeof(subtype), &subtype); 723 switch (subtype) { 724 #if NAGR > 0 725 case SLOWPROTOCOLS_SUBTYPE_LACP: 726 if (ifp->if_agrprivate) { 727 ieee8023ad_lacp_input(ifp, m); 728 return; 729 } 730 break; 731 732 case SLOWPROTOCOLS_SUBTYPE_MARKER: 733 if (ifp->if_agrprivate) { 734 ieee8023ad_marker_input(ifp, m); 735 return; 736 } 737 break; 738 #endif /* NAGR > 0 */ 739 default: 740 if (subtype == 0 || subtype > 10) { 741 /* illegal value */ 742 m_freem(m); 743 return; 744 } 745 /* unknown subtype */ 746 break; 747 } 748 /* FALLTHROUGH */ 749 } 750 default: 751 if (m->m_flags & M_PROMISC) { 752 m_freem(m); 753 return; 754 } 755 } 756 757 /* If the CRC is still on the packet, trim it off. */ 758 if (m->m_flags & M_HASFCS) { 759 m_adj(m, -ETHER_CRC_LEN); 760 m->m_flags &= ~M_HASFCS; 761 } 762 763 if (etype > ETHERMTU + sizeof (struct ether_header)) { 764 /* Strip off the Ethernet header. */ 765 m_adj(m, ehlen); 766 767 switch (etype) { 768 #ifdef INET 769 case ETHERTYPE_IP: 770 #ifdef GATEWAY 771 if (ipflow_fastforward(m)) 772 return; 773 #endif 774 pktq = ip_pktq; 775 break; 776 777 case ETHERTYPE_ARP: 778 isr = NETISR_ARP; 779 inq = &arpintrq; 780 break; 781 782 case ETHERTYPE_REVARP: 783 revarpinput(m); /* XXX queue? */ 784 return; 785 #endif 786 #ifdef INET6 787 case ETHERTYPE_IPV6: 788 if (__predict_false(!in6_present)) { 789 m_freem(m); 790 return; 791 } 792 #ifdef GATEWAY 793 if (ip6flow_fastforward(&m)) 794 return; 795 #endif 796 pktq = ip6_pktq; 797 break; 798 #endif 799 #ifdef NETATALK 800 case ETHERTYPE_ATALK: 801 isr = NETISR_ATALK; 802 inq = &atintrq1; 803 break; 804 case ETHERTYPE_AARP: 805 /* probably this should be done with a NETISR as well */ 806 aarpinput(ifp, m); /* XXX */ 807 return; 808 #endif /* NETATALK */ 809 #ifdef MPLS 810 case ETHERTYPE_MPLS: 811 isr = NETISR_MPLS; 812 inq = &mplsintrq; 813 break; 814 #endif 815 default: 816 m_freem(m); 817 return; 818 } 819 } else { 820 #if defined (LLC) || defined (NETATALK) 821 l = (struct llc *)(eh+1); 822 switch (l->llc_dsap) { 823 #ifdef NETATALK 824 case LLC_SNAP_LSAP: 825 switch (l->llc_control) { 826 case LLC_UI: 827 if (l->llc_ssap != LLC_SNAP_LSAP) { 828 goto dropanyway; 829 } 830 831 if (memcmp(&(l->llc_snap_org_code)[0], 832 at_org_code, sizeof(at_org_code)) == 0 && 833 ntohs(l->llc_snap_ether_type) == 834 ETHERTYPE_ATALK) { 835 inq = &atintrq2; 836 m_adj(m, sizeof(struct ether_header) 837 + sizeof(struct llc)); 838 isr = NETISR_ATALK; 839 break; 840 } 841 842 if (memcmp(&(l->llc_snap_org_code)[0], 843 aarp_org_code, 844 sizeof(aarp_org_code)) == 0 && 845 ntohs(l->llc_snap_ether_type) == 846 ETHERTYPE_AARP) { 847 m_adj( m, sizeof(struct ether_header) 848 + sizeof(struct llc)); 849 aarpinput(ifp, m); /* XXX */ 850 return; 851 } 852 853 default: 854 goto dropanyway; 855 } 856 break; 857 dropanyway: 858 #endif 859 default: 860 m_freem(m); 861 return; 862 } 863 #else /* ISO || LLC || NETATALK*/ 864 m_freem(m); 865 return; 866 #endif /* ISO || LLC || NETATALK*/ 867 } 868 869 if (__predict_true(pktq)) { 870 const uint32_t h = pktq_rps_hash(m); 871 if (__predict_false(!pktq_enqueue(pktq, m, h))) { 872 m_freem(m); 873 } 874 return; 875 } 876 877 if (__predict_false(!inq)) { 878 /* Should not happen. */ 879 m_freem(m); 880 return; 881 } 882 if (IF_QFULL(inq)) { 883 IF_DROP(inq); 884 m_freem(m); 885 } else { 886 IF_ENQUEUE(inq, m); 887 schednetisr(isr); 888 } 889 } 890 891 /* 892 * Convert Ethernet address to printable (loggable) representation. 893 */ 894 char * 895 ether_sprintf(const u_char *ap) 896 { 897 static char etherbuf[3 * ETHER_ADDR_LEN]; 898 return ether_snprintf(etherbuf, sizeof(etherbuf), ap); 899 } 900 901 char * 902 ether_snprintf(char *buf, size_t len, const u_char *ap) 903 { 904 char *cp = buf; 905 size_t i; 906 907 for (i = 0; i < len / 3; i++) { 908 *cp++ = hexdigits[*ap >> 4]; 909 *cp++ = hexdigits[*ap++ & 0xf]; 910 *cp++ = ':'; 911 } 912 *--cp = '\0'; 913 return buf; 914 } 915 916 /* 917 * Perform common duties while attaching to interface list 918 */ 919 void 920 ether_ifattach(struct ifnet *ifp, const uint8_t *lla) 921 { 922 struct ethercom *ec = (struct ethercom *)ifp; 923 924 ifp->if_extflags |= IFEF_OUTPUT_MPSAFE; 925 ifp->if_type = IFT_ETHER; 926 ifp->if_hdrlen = ETHER_HDR_LEN; 927 ifp->if_dlt = DLT_EN10MB; 928 ifp->if_mtu = ETHERMTU; 929 ifp->if_output = ether_output; 930 ifp->_if_input = ether_input; 931 if (ifp->if_baudrate == 0) 932 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 933 934 if_set_sadl(ifp, lla, ETHER_ADDR_LEN, !ETHER_IS_LOCAL(lla)); 935 936 LIST_INIT(&ec->ec_multiaddrs); 937 ifp->if_broadcastaddr = etherbroadcastaddr; 938 bpf_attach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 939 #ifdef MBUFTRACE 940 strlcpy(ec->ec_tx_mowner.mo_name, ifp->if_xname, 941 sizeof(ec->ec_tx_mowner.mo_name)); 942 strlcpy(ec->ec_tx_mowner.mo_descr, "tx", 943 sizeof(ec->ec_tx_mowner.mo_descr)); 944 strlcpy(ec->ec_rx_mowner.mo_name, ifp->if_xname, 945 sizeof(ec->ec_rx_mowner.mo_name)); 946 strlcpy(ec->ec_rx_mowner.mo_descr, "rx", 947 sizeof(ec->ec_rx_mowner.mo_descr)); 948 MOWNER_ATTACH(&ec->ec_tx_mowner); 949 MOWNER_ATTACH(&ec->ec_rx_mowner); 950 ifp->if_mowner = &ec->ec_tx_mowner; 951 #endif 952 } 953 954 void 955 ether_ifdetach(struct ifnet *ifp) 956 { 957 struct ethercom *ec = (void *) ifp; 958 struct ether_multi *enm; 959 int s; 960 961 /* 962 * Prevent further calls to ioctl (for example turning off 963 * promiscuous mode from the bridge code), which eventually can 964 * call if_init() which can cause panics because the interface 965 * is in the process of being detached. Return device not configured 966 * instead. 967 */ 968 ifp->if_ioctl = (int (*)(struct ifnet *, u_long, void *))enxio; 969 970 #if NBRIDGE > 0 971 if (ifp->if_bridge) 972 bridge_ifdetach(ifp); 973 #endif 974 975 bpf_detach(ifp); 976 977 #if NVLAN > 0 978 if (ec->ec_nvlans) 979 vlan_ifdetach(ifp); 980 #endif 981 982 s = splnet(); 983 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 984 LIST_REMOVE(enm, enm_list); 985 free(enm, M_IFMADDR); 986 ec->ec_multicnt--; 987 } 988 splx(s); 989 990 ifp->if_mowner = NULL; 991 MOWNER_DETACH(&ec->ec_rx_mowner); 992 MOWNER_DETACH(&ec->ec_tx_mowner); 993 } 994 995 #if 0 996 /* 997 * This is for reference. We have a table-driven version 998 * of the little-endian crc32 generator, which is faster 999 * than the double-loop. 1000 */ 1001 uint32_t 1002 ether_crc32_le(const uint8_t *buf, size_t len) 1003 { 1004 uint32_t c, crc, carry; 1005 size_t i, j; 1006 1007 crc = 0xffffffffU; /* initial value */ 1008 1009 for (i = 0; i < len; i++) { 1010 c = buf[i]; 1011 for (j = 0; j < 8; j++) { 1012 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1013 crc >>= 1; 1014 c >>= 1; 1015 if (carry) 1016 crc = (crc ^ ETHER_CRC_POLY_LE); 1017 } 1018 } 1019 1020 return (crc); 1021 } 1022 #else 1023 uint32_t 1024 ether_crc32_le(const uint8_t *buf, size_t len) 1025 { 1026 static const uint32_t crctab[] = { 1027 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1028 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1029 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1030 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1031 }; 1032 uint32_t crc; 1033 size_t i; 1034 1035 crc = 0xffffffffU; /* initial value */ 1036 1037 for (i = 0; i < len; i++) { 1038 crc ^= buf[i]; 1039 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1040 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1041 } 1042 1043 return (crc); 1044 } 1045 #endif 1046 1047 uint32_t 1048 ether_crc32_be(const uint8_t *buf, size_t len) 1049 { 1050 uint32_t c, crc, carry; 1051 size_t i, j; 1052 1053 crc = 0xffffffffU; /* initial value */ 1054 1055 for (i = 0; i < len; i++) { 1056 c = buf[i]; 1057 for (j = 0; j < 8; j++) { 1058 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1059 crc <<= 1; 1060 c >>= 1; 1061 if (carry) 1062 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1063 } 1064 } 1065 1066 return (crc); 1067 } 1068 1069 #ifdef INET 1070 const uint8_t ether_ipmulticast_min[ETHER_ADDR_LEN] = 1071 { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1072 const uint8_t ether_ipmulticast_max[ETHER_ADDR_LEN] = 1073 { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1074 #endif 1075 #ifdef INET6 1076 const uint8_t ether_ip6multicast_min[ETHER_ADDR_LEN] = 1077 { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1078 const uint8_t ether_ip6multicast_max[ETHER_ADDR_LEN] = 1079 { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1080 #endif 1081 1082 /* 1083 * ether_aton implementation, not using a static buffer. 1084 */ 1085 int 1086 ether_aton_r(u_char *dest, size_t len, const char *str) 1087 { 1088 const u_char *cp = (const void *)str; 1089 u_char *ep; 1090 1091 #define atox(c) (((c) <= '9') ? ((c) - '0') : ((toupper(c) - 'A') + 10)) 1092 1093 if (len < ETHER_ADDR_LEN) 1094 return ENOSPC; 1095 1096 ep = dest + ETHER_ADDR_LEN; 1097 1098 while (*cp) { 1099 if (!isxdigit(*cp)) 1100 return EINVAL; 1101 *dest = atox(*cp); 1102 cp++; 1103 if (isxdigit(*cp)) { 1104 *dest = (*dest << 4) | atox(*cp); 1105 dest++; 1106 cp++; 1107 } else 1108 dest++; 1109 if (dest == ep) 1110 return *cp == '\0' ? 0 : ENAMETOOLONG; 1111 switch (*cp) { 1112 case ':': 1113 case '-': 1114 case '.': 1115 cp++; 1116 break; 1117 } 1118 } 1119 return ENOBUFS; 1120 } 1121 1122 /* 1123 * Convert a sockaddr into an Ethernet address or range of Ethernet 1124 * addresses. 1125 */ 1126 int 1127 ether_multiaddr(const struct sockaddr *sa, uint8_t addrlo[ETHER_ADDR_LEN], 1128 uint8_t addrhi[ETHER_ADDR_LEN]) 1129 { 1130 #ifdef INET 1131 const struct sockaddr_in *sin; 1132 #endif /* INET */ 1133 #ifdef INET6 1134 const struct sockaddr_in6 *sin6; 1135 #endif /* INET6 */ 1136 1137 switch (sa->sa_family) { 1138 1139 case AF_UNSPEC: 1140 memcpy(addrlo, sa->sa_data, ETHER_ADDR_LEN); 1141 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1142 break; 1143 1144 #ifdef INET 1145 case AF_INET: 1146 sin = satocsin(sa); 1147 if (sin->sin_addr.s_addr == INADDR_ANY) { 1148 /* 1149 * An IP address of INADDR_ANY means listen to 1150 * or stop listening to all of the Ethernet 1151 * multicast addresses used for IP. 1152 * (This is for the sake of IP multicast routers.) 1153 */ 1154 memcpy(addrlo, ether_ipmulticast_min, ETHER_ADDR_LEN); 1155 memcpy(addrhi, ether_ipmulticast_max, ETHER_ADDR_LEN); 1156 } 1157 else { 1158 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1159 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1160 } 1161 break; 1162 #endif 1163 #ifdef INET6 1164 case AF_INET6: 1165 sin6 = satocsin6(sa); 1166 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1167 /* 1168 * An IP6 address of 0 means listen to or stop 1169 * listening to all of the Ethernet multicast 1170 * address used for IP6. 1171 * (This is used for multicast routers.) 1172 */ 1173 memcpy(addrlo, ether_ip6multicast_min, ETHER_ADDR_LEN); 1174 memcpy(addrhi, ether_ip6multicast_max, ETHER_ADDR_LEN); 1175 } else { 1176 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1177 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1178 } 1179 break; 1180 #endif 1181 1182 default: 1183 return EAFNOSUPPORT; 1184 } 1185 return 0; 1186 } 1187 1188 /* 1189 * Add an Ethernet multicast address or range of addresses to the list for a 1190 * given interface. 1191 */ 1192 int 1193 ether_addmulti(const struct sockaddr *sa, struct ethercom *ec) 1194 { 1195 struct ether_multi *enm; 1196 u_char addrlo[ETHER_ADDR_LEN]; 1197 u_char addrhi[ETHER_ADDR_LEN]; 1198 int s = splnet(), error; 1199 1200 error = ether_multiaddr(sa, addrlo, addrhi); 1201 if (error != 0) { 1202 splx(s); 1203 return error; 1204 } 1205 1206 /* 1207 * Verify that we have valid Ethernet multicast addresses. 1208 */ 1209 if (!ETHER_IS_MULTICAST(addrlo) || !ETHER_IS_MULTICAST(addrhi)) { 1210 splx(s); 1211 return EINVAL; 1212 } 1213 /* 1214 * See if the address range is already in the list. 1215 */ 1216 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1217 if (enm != NULL) { 1218 /* 1219 * Found it; just increment the reference count. 1220 */ 1221 ++enm->enm_refcount; 1222 splx(s); 1223 return 0; 1224 } 1225 /* 1226 * New address or range; malloc a new multicast record 1227 * and link it into the interface's multicast list. 1228 */ 1229 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1230 if (enm == NULL) { 1231 splx(s); 1232 return ENOBUFS; 1233 } 1234 memcpy(enm->enm_addrlo, addrlo, 6); 1235 memcpy(enm->enm_addrhi, addrhi, 6); 1236 enm->enm_refcount = 1; 1237 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1238 ec->ec_multicnt++; 1239 splx(s); 1240 /* 1241 * Return ENETRESET to inform the driver that the list has changed 1242 * and its reception filter should be adjusted accordingly. 1243 */ 1244 return ENETRESET; 1245 } 1246 1247 /* 1248 * Delete a multicast address record. 1249 */ 1250 int 1251 ether_delmulti(const struct sockaddr *sa, struct ethercom *ec) 1252 { 1253 struct ether_multi *enm; 1254 u_char addrlo[ETHER_ADDR_LEN]; 1255 u_char addrhi[ETHER_ADDR_LEN]; 1256 int s = splnet(), error; 1257 1258 error = ether_multiaddr(sa, addrlo, addrhi); 1259 if (error != 0) { 1260 splx(s); 1261 return (error); 1262 } 1263 1264 /* 1265 * Look ur the address in our list. 1266 */ 1267 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1268 if (enm == NULL) { 1269 splx(s); 1270 return (ENXIO); 1271 } 1272 if (--enm->enm_refcount != 0) { 1273 /* 1274 * Still some claims to this record. 1275 */ 1276 splx(s); 1277 return (0); 1278 } 1279 /* 1280 * No remaining claims to this record; unlink and free it. 1281 */ 1282 LIST_REMOVE(enm, enm_list); 1283 free(enm, M_IFMADDR); 1284 ec->ec_multicnt--; 1285 splx(s); 1286 /* 1287 * Return ENETRESET to inform the driver that the list has changed 1288 * and its reception filter should be adjusted accordingly. 1289 */ 1290 return (ENETRESET); 1291 } 1292 1293 void 1294 ether_set_ifflags_cb(struct ethercom *ec, ether_cb_t cb) 1295 { 1296 ec->ec_ifflags_cb = cb; 1297 } 1298 1299 /* 1300 * Common ioctls for Ethernet interfaces. Note, we must be 1301 * called at splnet(). 1302 */ 1303 int 1304 ether_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1305 { 1306 struct ethercom *ec = (void *) ifp; 1307 struct eccapreq *eccr; 1308 struct ifreq *ifr = (struct ifreq *)data; 1309 struct if_laddrreq *iflr = data; 1310 const struct sockaddr_dl *sdl; 1311 static const uint8_t zero[ETHER_ADDR_LEN]; 1312 int error; 1313 1314 switch (cmd) { 1315 case SIOCINITIFADDR: 1316 { 1317 struct ifaddr *ifa = (struct ifaddr *)data; 1318 if (ifa->ifa_addr->sa_family != AF_LINK 1319 && (ifp->if_flags & (IFF_UP|IFF_RUNNING)) != 1320 (IFF_UP|IFF_RUNNING)) { 1321 ifp->if_flags |= IFF_UP; 1322 if ((error = (*ifp->if_init)(ifp)) != 0) 1323 return error; 1324 } 1325 #ifdef INET 1326 if (ifa->ifa_addr->sa_family == AF_INET) 1327 arp_ifinit(ifp, ifa); 1328 #endif /* INET */ 1329 return 0; 1330 } 1331 1332 case SIOCSIFMTU: 1333 { 1334 int maxmtu; 1335 1336 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1337 maxmtu = ETHERMTU_JUMBO; 1338 else 1339 maxmtu = ETHERMTU; 1340 1341 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1342 return EINVAL; 1343 else if ((error = ifioctl_common(ifp, cmd, data)) != ENETRESET) 1344 return error; 1345 else if (ifp->if_flags & IFF_UP) { 1346 /* Make sure the device notices the MTU change. */ 1347 return (*ifp->if_init)(ifp); 1348 } else 1349 return 0; 1350 } 1351 1352 case SIOCSIFFLAGS: 1353 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1354 return error; 1355 switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) { 1356 case IFF_RUNNING: 1357 /* 1358 * If interface is marked down and it is running, 1359 * then stop and disable it. 1360 */ 1361 (*ifp->if_stop)(ifp, 1); 1362 break; 1363 case IFF_UP: 1364 /* 1365 * If interface is marked up and it is stopped, then 1366 * start it. 1367 */ 1368 return (*ifp->if_init)(ifp); 1369 case IFF_UP|IFF_RUNNING: 1370 error = 0; 1371 if (ec->ec_ifflags_cb == NULL || 1372 (error = (*ec->ec_ifflags_cb)(ec)) == ENETRESET) { 1373 /* 1374 * Reset the interface to pick up 1375 * changes in any other flags that 1376 * affect the hardware state. 1377 */ 1378 return (*ifp->if_init)(ifp); 1379 } else 1380 return error; 1381 case 0: 1382 break; 1383 } 1384 return 0; 1385 case SIOCGETHERCAP: 1386 eccr = (struct eccapreq *)data; 1387 eccr->eccr_capabilities = ec->ec_capabilities; 1388 eccr->eccr_capenable = ec->ec_capenable; 1389 return 0; 1390 case SIOCADDMULTI: 1391 return ether_addmulti(ifreq_getaddr(cmd, ifr), ec); 1392 case SIOCDELMULTI: 1393 return ether_delmulti(ifreq_getaddr(cmd, ifr), ec); 1394 case SIOCSIFMEDIA: 1395 case SIOCGIFMEDIA: 1396 if (ec->ec_mii == NULL) 1397 return ENOTTY; 1398 return ifmedia_ioctl(ifp, ifr, &ec->ec_mii->mii_media, cmd); 1399 case SIOCALIFADDR: 1400 sdl = satocsdl(sstocsa(&iflr->addr)); 1401 if (sdl->sdl_family != AF_LINK) 1402 ; 1403 else if (ETHER_IS_MULTICAST(CLLADDR(sdl))) 1404 return EINVAL; 1405 else if (memcmp(zero, CLLADDR(sdl), sizeof(zero)) == 0) 1406 return EINVAL; 1407 /*FALLTHROUGH*/ 1408 default: 1409 return ifioctl_common(ifp, cmd, data); 1410 } 1411 return 0; 1412 } 1413 1414 /* 1415 * Enable/disable passing VLAN packets if the parent interface supports it. 1416 * Return: 1417 * 0: Ok 1418 * -1: Parent interface does not support vlans 1419 * >0: Error 1420 */ 1421 int 1422 ether_enable_vlan_mtu(struct ifnet *ifp) 1423 { 1424 int error; 1425 struct ethercom *ec = (void *)ifp; 1426 1427 /* Already have VLAN's do nothing. */ 1428 if (ec->ec_nvlans != 0) 1429 return 0; 1430 1431 /* Parent does not support VLAN's */ 1432 if ((ec->ec_capabilities & ETHERCAP_VLAN_MTU) == 0) 1433 return -1; 1434 1435 /* 1436 * Parent supports the VLAN_MTU capability, 1437 * i.e. can Tx/Rx larger than ETHER_MAX_LEN frames; 1438 * enable it. 1439 */ 1440 ec->ec_capenable |= ETHERCAP_VLAN_MTU; 1441 1442 /* Interface is down, defer for later */ 1443 if ((ifp->if_flags & IFF_UP) == 0) 1444 return 0; 1445 1446 if ((error = if_flags_set(ifp, ifp->if_flags)) == 0) 1447 return 0; 1448 1449 ec->ec_capenable &= ~ETHERCAP_VLAN_MTU; 1450 return error; 1451 } 1452 1453 int 1454 ether_disable_vlan_mtu(struct ifnet *ifp) 1455 { 1456 int error; 1457 struct ethercom *ec = (void *)ifp; 1458 1459 /* We still have VLAN's, defer for later */ 1460 if (ec->ec_nvlans != 0) 1461 return 0; 1462 1463 /* Parent does not support VLAB's, nothing to do. */ 1464 if ((ec->ec_capenable & ETHERCAP_VLAN_MTU) == 0) 1465 return -1; 1466 1467 /* 1468 * Disable Tx/Rx of VLAN-sized frames. 1469 */ 1470 ec->ec_capenable &= ~ETHERCAP_VLAN_MTU; 1471 1472 /* Interface is down, defer for later */ 1473 if ((ifp->if_flags & IFF_UP) == 0) 1474 return 0; 1475 1476 if ((error = if_flags_set(ifp, ifp->if_flags)) == 0) 1477 return 0; 1478 1479 ec->ec_capenable |= ETHERCAP_VLAN_MTU; 1480 return error; 1481 } 1482 1483 static int 1484 ether_multicast_sysctl(SYSCTLFN_ARGS) 1485 { 1486 struct ether_multi *enm; 1487 struct ether_multi_sysctl addr; 1488 struct ifnet *ifp; 1489 struct ethercom *ec; 1490 int error = 0; 1491 size_t written; 1492 struct psref psref; 1493 int bound; 1494 1495 if (namelen != 1) 1496 return EINVAL; 1497 1498 bound = curlwp_bind(); 1499 ifp = if_get_byindex(name[0], &psref); 1500 if (ifp == NULL) { 1501 error = ENODEV; 1502 goto out; 1503 } 1504 if (ifp->if_type != IFT_ETHER) { 1505 if_put(ifp, &psref); 1506 *oldlenp = 0; 1507 goto out; 1508 } 1509 ec = (struct ethercom *)ifp; 1510 1511 if (oldp == NULL) { 1512 if_put(ifp, &psref); 1513 *oldlenp = ec->ec_multicnt * sizeof(addr); 1514 goto out; 1515 } 1516 1517 memset(&addr, 0, sizeof(addr)); 1518 error = 0; 1519 written = 0; 1520 1521 LIST_FOREACH(enm, &ec->ec_multiaddrs, enm_list) { 1522 if (written + sizeof(addr) > *oldlenp) 1523 break; 1524 addr.enm_refcount = enm->enm_refcount; 1525 memcpy(addr.enm_addrlo, enm->enm_addrlo, ETHER_ADDR_LEN); 1526 memcpy(addr.enm_addrhi, enm->enm_addrhi, ETHER_ADDR_LEN); 1527 error = sysctl_copyout(l, &addr, oldp, sizeof(addr)); 1528 if (error) 1529 break; 1530 written += sizeof(addr); 1531 oldp = (char *)oldp + sizeof(addr); 1532 } 1533 if_put(ifp, &psref); 1534 1535 *oldlenp = written; 1536 out: 1537 curlwp_bindx(bound); 1538 return error; 1539 } 1540 1541 SYSCTL_SETUP(sysctl_net_ether_setup, "sysctl net.ether subtree setup") 1542 { 1543 const struct sysctlnode *rnode = NULL; 1544 1545 sysctl_createv(clog, 0, NULL, &rnode, 1546 CTLFLAG_PERMANENT, 1547 CTLTYPE_NODE, "ether", 1548 SYSCTL_DESCR("Ethernet-specific information"), 1549 NULL, 0, NULL, 0, 1550 CTL_NET, CTL_CREATE, CTL_EOL); 1551 1552 sysctl_createv(clog, 0, &rnode, NULL, 1553 CTLFLAG_PERMANENT, 1554 CTLTYPE_NODE, "multicast", 1555 SYSCTL_DESCR("multicast addresses"), 1556 ether_multicast_sysctl, 0, NULL, 0, 1557 CTL_CREATE, CTL_EOL); 1558 } 1559 1560 void 1561 etherinit(void) 1562 { 1563 mutex_init(&bigpktpps_lock, MUTEX_DEFAULT, IPL_NET); 1564 } 1565
Indexes created Tue Sep 30 06:09:59 GMT 2025