if_ethersubr.c revision 1.218
1 /* $NetBSD: if_ethersubr.c,v 1.218 2016/04/15 01:31:29 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 1.218 2016/04/15 01:31:29 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 *, 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 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 ALTQ_DECL(struct altq_pktattr pktattr;) 201 #ifdef INET 202 struct arphdr *ah; 203 #endif /* INET */ 204 #ifdef NETATALK 205 struct at_ifaddr *aa; 206 #endif /* NETATALK */ 207 208 #ifndef NET_MPSAFE 209 KASSERT(KERNEL_LOCKED_P()); 210 #endif 211 212 #ifdef MBUFTRACE 213 m_claimm(m, ifp->if_mowner); 214 #endif 215 216 #if NCARP > 0 217 if (ifp->if_type == IFT_CARP) { 218 struct ifaddr *ifa; 219 220 /* loop back if this is going to the carp interface */ 221 if (dst != NULL && ifp0->if_link_state == LINK_STATE_UP && 222 (ifa = ifa_ifwithaddr(dst)) != NULL && 223 ifa->ifa_ifp == ifp0) 224 return looutput(ifp0, m, dst, rt); 225 226 ifp = ifp->if_carpdev; 227 /* ac = (struct arpcom *)ifp; */ 228 229 if ((ifp0->if_flags & (IFF_UP|IFF_RUNNING)) != 230 (IFF_UP|IFF_RUNNING)) 231 senderr(ENETDOWN); 232 } 233 #endif /* NCARP > 0 */ 234 235 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 236 senderr(ENETDOWN); 237 238 switch (dst->sa_family) { 239 240 #ifdef INET 241 case AF_INET: 242 if (m->m_flags & M_BCAST) 243 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 244 else if (m->m_flags & M_MCAST) 245 ETHER_MAP_IP_MULTICAST(&satocsin(dst)->sin_addr, edst); 246 else if ((error = arpresolve(ifp, rt, m, dst, edst, 247 sizeof(edst))) != 0) 248 return error == EWOULDBLOCK ? 0 : error; 249 /* If broadcasting on a simplex interface, loopback a copy */ 250 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 251 mcopy = m_copy(m, 0, (int)M_COPYALL); 252 etype = htons(ETHERTYPE_IP); 253 break; 254 255 case AF_ARP: 256 ah = mtod(m, struct arphdr *); 257 if (m->m_flags & M_BCAST) 258 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 259 else { 260 void *tha = ar_tha(ah); 261 262 if (tha == NULL) { 263 /* fake with ARPHDR_IEEE1394 */ 264 return 0; 265 } 266 memcpy(edst, tha, sizeof(edst)); 267 } 268 269 ah->ar_hrd = htons(ARPHRD_ETHER); 270 271 switch (ntohs(ah->ar_op)) { 272 case ARPOP_REVREQUEST: 273 case ARPOP_REVREPLY: 274 etype = htons(ETHERTYPE_REVARP); 275 break; 276 277 case ARPOP_REQUEST: 278 case ARPOP_REPLY: 279 default: 280 etype = htons(ETHERTYPE_ARP); 281 } 282 283 break; 284 #endif 285 #ifdef INET6 286 case AF_INET6: 287 if (!nd6_storelladdr(ifp, rt, m, dst, edst, sizeof(edst))){ 288 /* something bad happened */ 289 return (0); 290 } 291 etype = htons(ETHERTYPE_IPV6); 292 break; 293 #endif 294 #ifdef NETATALK 295 case AF_APPLETALK: 296 if (aarpresolve(ifp, m, (const struct sockaddr_at *)dst, edst)) { 297 #ifdef NETATALKDEBUG 298 printf("aarpresolv failed\n"); 299 #endif /* NETATALKDEBUG */ 300 return (0); 301 } 302 /* 303 * ifaddr is the first thing in at_ifaddr 304 */ 305 aa = (struct at_ifaddr *) at_ifawithnet( 306 (const struct sockaddr_at *)dst, ifp); 307 if (aa == NULL) 308 goto bad; 309 310 /* 311 * In the phase 2 case, we need to prepend an mbuf for the 312 * llc header. Since we must preserve the value of m, 313 * which is passed to us by value, we m_copy() the first 314 * mbuf, and use it for our llc header. 315 */ 316 if (aa->aa_flags & AFA_PHASE2) { 317 struct llc llc; 318 319 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 320 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 321 llc.llc_control = LLC_UI; 322 memcpy(llc.llc_snap_org_code, at_org_code, 323 sizeof(llc.llc_snap_org_code)); 324 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 325 memcpy(mtod(m, void *), &llc, sizeof(struct llc)); 326 } else { 327 etype = htons(ETHERTYPE_ATALK); 328 } 329 break; 330 #endif /* NETATALK */ 331 case pseudo_AF_HDRCMPLT: 332 hdrcmplt = 1; 333 memcpy(esrc, 334 ((const struct ether_header *)dst->sa_data)->ether_shost, 335 sizeof(esrc)); 336 /* FALLTHROUGH */ 337 338 case AF_UNSPEC: 339 memcpy(edst, 340 ((const struct ether_header *)dst->sa_data)->ether_dhost, 341 sizeof(edst)); 342 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 343 etype = ((const struct ether_header *)dst->sa_data)->ether_type; 344 break; 345 346 default: 347 printf("%s: can't handle af%d\n", ifp->if_xname, 348 dst->sa_family); 349 senderr(EAFNOSUPPORT); 350 } 351 352 #ifdef MPLS 353 { 354 struct m_tag *mtag; 355 mtag = m_tag_find(m, PACKET_TAG_MPLS, NULL); 356 if (mtag != NULL) { 357 /* Having the tag itself indicates it's MPLS */ 358 etype = htons(ETHERTYPE_MPLS); 359 m_tag_delete(m, mtag); 360 } 361 } 362 #endif 363 364 if (mcopy) 365 (void)looutput(ifp, mcopy, dst, rt); 366 367 /* If no ether type is set, this must be a 802.2 formatted packet. 368 */ 369 if (etype == 0) 370 etype = htons(m->m_pkthdr.len); 371 /* 372 * Add local net header. If no space in first mbuf, 373 * allocate another. 374 */ 375 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 376 if (m == 0) 377 senderr(ENOBUFS); 378 eh = mtod(m, struct ether_header *); 379 /* Note: etype is already in network byte order. */ 380 (void)memcpy(&eh->ether_type, &etype, sizeof(eh->ether_type)); 381 memcpy(eh->ether_dhost, edst, sizeof(edst)); 382 if (hdrcmplt) 383 memcpy(eh->ether_shost, esrc, sizeof(eh->ether_shost)); 384 else 385 memcpy(eh->ether_shost, CLLADDR(ifp->if_sadl), 386 sizeof(eh->ether_shost)); 387 388 #if NCARP > 0 389 if (ifp0 != ifp && ifp0->if_type == IFT_CARP) { 390 memcpy(eh->ether_shost, CLLADDR(ifp0->if_sadl), 391 sizeof(eh->ether_shost)); 392 } 393 #endif /* NCARP > 0 */ 394 395 if ((error = pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 396 return (error); 397 if (m == NULL) 398 return (0); 399 400 #if NBRIDGE > 0 401 /* 402 * Bridges require special output handling. 403 */ 404 if (ifp->if_bridge) 405 return (bridge_output(ifp, m, NULL, NULL)); 406 #endif 407 408 #if NCARP > 0 409 if (ifp != ifp0) 410 ifp0->if_obytes += m->m_pkthdr.len + ETHER_HDR_LEN; 411 #endif /* NCARP > 0 */ 412 413 #ifdef ALTQ 414 /* 415 * If ALTQ is enabled on the parent interface, do 416 * classification; the queueing discipline might not 417 * require classification, but might require the 418 * address family/header pointer in the pktattr. 419 */ 420 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 421 altq_etherclassify(&ifp->if_snd, m, &pktattr); 422 #endif 423 return ifq_enqueue(ifp, m ALTQ_COMMA ALTQ_DECL(&pktattr)); 424 425 bad: 426 if (m) 427 m_freem(m); 428 return (error); 429 } 430 431 #ifdef ALTQ 432 /* 433 * This routine is a slight hack to allow a packet to be classified 434 * if the Ethernet headers are present. It will go away when ALTQ's 435 * classification engine understands link headers. 436 */ 437 void 438 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m, 439 struct altq_pktattr *pktattr) 440 { 441 struct ether_header *eh; 442 uint16_t ether_type; 443 int hlen, af, hdrsize; 444 void *hdr; 445 446 hlen = ETHER_HDR_LEN; 447 eh = mtod(m, struct ether_header *); 448 449 ether_type = htons(eh->ether_type); 450 451 if (ether_type < ETHERMTU) { 452 /* LLC/SNAP */ 453 struct llc *llc = (struct llc *)(eh + 1); 454 hlen += 8; 455 456 if (m->m_len < hlen || 457 llc->llc_dsap != LLC_SNAP_LSAP || 458 llc->llc_ssap != LLC_SNAP_LSAP || 459 llc->llc_control != LLC_UI) { 460 /* Not SNAP. */ 461 goto bad; 462 } 463 464 ether_type = htons(llc->llc_un.type_snap.ether_type); 465 } 466 467 switch (ether_type) { 468 case ETHERTYPE_IP: 469 af = AF_INET; 470 hdrsize = 20; /* sizeof(struct ip) */ 471 break; 472 473 case ETHERTYPE_IPV6: 474 af = AF_INET6; 475 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 476 break; 477 478 default: 479 af = AF_UNSPEC; 480 hdrsize = 0; 481 break; 482 } 483 484 while (m->m_len <= hlen) { 485 hlen -= m->m_len; 486 m = m->m_next; 487 } 488 if (m->m_len < (hlen + hdrsize)) { 489 /* 490 * protocol header not in a single mbuf. 491 * We can't cope with this situation right 492 * now (but it shouldn't ever happen, really, anyhow). 493 */ 494 #ifdef DEBUG 495 printf("altq_etherclassify: headers span multiple mbufs: " 496 "%d < %d\n", m->m_len, (hlen + hdrsize)); 497 #endif 498 goto bad; 499 } 500 501 m->m_data += hlen; 502 m->m_len -= hlen; 503 504 hdr = mtod(m, void *); 505 506 if (ALTQ_NEEDS_CLASSIFY(ifq)) 507 pktattr->pattr_class = 508 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 509 pktattr->pattr_af = af; 510 pktattr->pattr_hdr = hdr; 511 512 m->m_data -= hlen; 513 m->m_len += hlen; 514 515 return; 516 517 bad: 518 pktattr->pattr_class = NULL; 519 pktattr->pattr_hdr = NULL; 520 pktattr->pattr_af = AF_UNSPEC; 521 } 522 #endif /* ALTQ */ 523 524 /* 525 * Process a received Ethernet packet; 526 * the packet is in the mbuf chain m with 527 * the ether header. 528 */ 529 void 530 ether_input(struct ifnet *ifp, struct mbuf *m) 531 { 532 struct ethercom *ec = (struct ethercom *) ifp; 533 pktqueue_t *pktq = NULL; 534 struct ifqueue *inq = NULL; 535 uint16_t etype; 536 struct ether_header *eh; 537 size_t ehlen; 538 static int earlypkts; 539 int isr = 0; 540 #if defined (LLC) || defined(NETATALK) 541 struct llc *l; 542 #endif 543 544 KASSERT(!cpu_intr_p()); 545 546 if ((ifp->if_flags & IFF_UP) == 0) { 547 m_freem(m); 548 return; 549 } 550 551 #ifdef MBUFTRACE 552 m_claimm(m, &ec->ec_rx_mowner); 553 #endif 554 eh = mtod(m, struct ether_header *); 555 etype = ntohs(eh->ether_type); 556 ehlen = sizeof(*eh); 557 558 if(__predict_false(earlypkts < 100 || !rnd_initial_entropy)) { 559 rnd_add_data(NULL, eh, ehlen, 0); 560 earlypkts++; 561 } 562 563 /* 564 * Determine if the packet is within its size limits. 565 */ 566 if (etype != ETHERTYPE_MPLS && m->m_pkthdr.len > 567 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 568 mutex_enter(&bigpktpps_lock); 569 if (ppsratecheck(&bigpktppslim_last, &bigpktpps_count, 570 bigpktppslim)) { 571 printf("%s: discarding oversize frame (len=%d)\n", 572 ifp->if_xname, m->m_pkthdr.len); 573 } 574 mutex_exit(&bigpktpps_lock); 575 m_freem(m); 576 return; 577 } 578 579 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 580 /* 581 * If this is not a simplex interface, drop the packet 582 * if it came from us. 583 */ 584 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 585 memcmp(CLLADDR(ifp->if_sadl), eh->ether_shost, 586 ETHER_ADDR_LEN) == 0) { 587 m_freem(m); 588 return; 589 } 590 591 if (memcmp(etherbroadcastaddr, 592 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 593 m->m_flags |= M_BCAST; 594 else 595 m->m_flags |= M_MCAST; 596 ifp->if_imcasts++; 597 } 598 599 /* If the CRC is still on the packet, trim it off. */ 600 if (m->m_flags & M_HASFCS) { 601 m_adj(m, -ETHER_CRC_LEN); 602 m->m_flags &= ~M_HASFCS; 603 } 604 605 ifp->if_ibytes += m->m_pkthdr.len; 606 607 #if NCARP > 0 608 if (__predict_false(ifp->if_carp && ifp->if_type != IFT_CARP)) { 609 /* 610 * clear M_PROMISC, in case the packets comes from a 611 * vlan 612 */ 613 m->m_flags &= ~M_PROMISC; 614 if (carp_input(m, (uint8_t *)&eh->ether_shost, 615 (uint8_t *)&eh->ether_dhost, eh->ether_type) == 0) 616 return; 617 } 618 #endif /* NCARP > 0 */ 619 if ((m->m_flags & (M_BCAST|M_MCAST|M_PROMISC)) == 0 && 620 (ifp->if_flags & IFF_PROMISC) != 0 && 621 memcmp(CLLADDR(ifp->if_sadl), eh->ether_dhost, 622 ETHER_ADDR_LEN) != 0) { 623 m->m_flags |= M_PROMISC; 624 } 625 626 if ((m->m_flags & M_PROMISC) == 0) { 627 if (pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 628 return; 629 if (m == NULL) 630 return; 631 632 eh = mtod(m, struct ether_header *); 633 etype = ntohs(eh->ether_type); 634 ehlen = sizeof(*eh); 635 } 636 637 #if NAGR > 0 638 if (ifp->if_agrprivate && 639 __predict_true(etype != ETHERTYPE_SLOWPROTOCOLS)) { 640 m->m_flags &= ~M_PROMISC; 641 agr_input(ifp, m); 642 return; 643 } 644 #endif /* NAGR > 0 */ 645 646 /* 647 * If VLANs are configured on the interface, check to 648 * see if the device performed the decapsulation and 649 * provided us with the tag. 650 */ 651 if (ec->ec_nvlans && m_tag_find(m, PACKET_TAG_VLAN, NULL) != NULL) { 652 #if NVLAN > 0 653 /* 654 * vlan_input() will either recursively call ether_input() 655 * or drop the packet. 656 */ 657 vlan_input(ifp, m); 658 #else 659 m_freem(m); 660 #endif 661 return; 662 } 663 664 /* 665 * Handle protocols that expect to have the Ethernet header 666 * (and possibly FCS) intact. 667 */ 668 switch (etype) { 669 case ETHERTYPE_VLAN: { 670 struct ether_vlan_header *evl = (void *)eh; 671 /* 672 * If there is a tag of 0, then the VLAN header was probably 673 * just being used to store the priority. Extract the ether 674 * type, and if IP or IPV6, let them deal with it. 675 */ 676 if (m->m_len <= sizeof(*evl) 677 && EVL_VLANOFTAG(evl->evl_tag) == 0) { 678 etype = ntohs(evl->evl_proto); 679 ehlen = sizeof(*evl); 680 if ((m->m_flags & M_PROMISC) == 0 681 && (etype == ETHERTYPE_IP 682 || etype == ETHERTYPE_IPV6)) 683 break; 684 } 685 #if NVLAN > 0 686 /* 687 * vlan_input() will either recursively call ether_input() 688 * or drop the packet. 689 */ 690 if (((struct ethercom *)ifp)->ec_nvlans != 0) 691 vlan_input(ifp, m); 692 else 693 #endif /* NVLAN > 0 */ 694 m_freem(m); 695 return; 696 } 697 #if NPPPOE > 0 698 case ETHERTYPE_PPPOEDISC: 699 pppoedisc_input(ifp, m); 700 return; 701 case ETHERTYPE_PPPOE: 702 pppoe_input(ifp, m); 703 return; 704 #endif /* NPPPOE > 0 */ 705 case ETHERTYPE_SLOWPROTOCOLS: { 706 uint8_t subtype; 707 708 #if defined(DIAGNOSTIC) 709 if (m->m_pkthdr.len < sizeof(*eh) + sizeof(subtype)) { 710 panic("ether_input: too short slow protocol packet"); 711 } 712 #endif 713 m_copydata(m, sizeof(*eh), sizeof(subtype), &subtype); 714 switch (subtype) { 715 #if NAGR > 0 716 case SLOWPROTOCOLS_SUBTYPE_LACP: 717 if (ifp->if_agrprivate) { 718 ieee8023ad_lacp_input(ifp, m); 719 return; 720 } 721 break; 722 723 case SLOWPROTOCOLS_SUBTYPE_MARKER: 724 if (ifp->if_agrprivate) { 725 ieee8023ad_marker_input(ifp, m); 726 return; 727 } 728 break; 729 #endif /* NAGR > 0 */ 730 default: 731 if (subtype == 0 || subtype > 10) { 732 /* illegal value */ 733 m_freem(m); 734 return; 735 } 736 /* unknown subtype */ 737 break; 738 } 739 /* FALLTHROUGH */ 740 } 741 default: 742 if (m->m_flags & M_PROMISC) { 743 m_freem(m); 744 return; 745 } 746 } 747 748 /* If the CRC is still on the packet, trim it off. */ 749 if (m->m_flags & M_HASFCS) { 750 m_adj(m, -ETHER_CRC_LEN); 751 m->m_flags &= ~M_HASFCS; 752 } 753 754 if (etype > ETHERMTU + sizeof (struct ether_header)) { 755 /* Strip off the Ethernet header. */ 756 m_adj(m, ehlen); 757 758 switch (etype) { 759 #ifdef INET 760 case ETHERTYPE_IP: 761 #ifdef GATEWAY 762 if (ipflow_fastforward(m)) 763 return; 764 #endif 765 pktq = ip_pktq; 766 break; 767 768 case ETHERTYPE_ARP: 769 isr = NETISR_ARP; 770 inq = &arpintrq; 771 break; 772 773 case ETHERTYPE_REVARP: 774 revarpinput(m); /* XXX queue? */ 775 return; 776 #endif 777 #ifdef INET6 778 case ETHERTYPE_IPV6: 779 if (__predict_false(!in6_present)) { 780 m_freem(m); 781 return; 782 } 783 #ifdef GATEWAY 784 if (ip6flow_fastforward(&m)) 785 return; 786 #endif 787 pktq = ip6_pktq; 788 break; 789 #endif 790 #ifdef NETATALK 791 case ETHERTYPE_ATALK: 792 isr = NETISR_ATALK; 793 inq = &atintrq1; 794 break; 795 case ETHERTYPE_AARP: 796 /* probably this should be done with a NETISR as well */ 797 aarpinput(ifp, m); /* XXX */ 798 return; 799 #endif /* NETATALK */ 800 #ifdef MPLS 801 case ETHERTYPE_MPLS: 802 isr = NETISR_MPLS; 803 inq = &mplsintrq; 804 break; 805 #endif 806 default: 807 m_freem(m); 808 return; 809 } 810 } else { 811 #if defined (LLC) || defined (NETATALK) 812 l = (struct llc *)(eh+1); 813 switch (l->llc_dsap) { 814 #ifdef NETATALK 815 case LLC_SNAP_LSAP: 816 switch (l->llc_control) { 817 case LLC_UI: 818 if (l->llc_ssap != LLC_SNAP_LSAP) { 819 goto dropanyway; 820 } 821 822 if (memcmp(&(l->llc_snap_org_code)[0], 823 at_org_code, sizeof(at_org_code)) == 0 && 824 ntohs(l->llc_snap_ether_type) == 825 ETHERTYPE_ATALK) { 826 inq = &atintrq2; 827 m_adj(m, sizeof(struct ether_header) 828 + sizeof(struct llc)); 829 isr = NETISR_ATALK; 830 break; 831 } 832 833 if (memcmp(&(l->llc_snap_org_code)[0], 834 aarp_org_code, 835 sizeof(aarp_org_code)) == 0 && 836 ntohs(l->llc_snap_ether_type) == 837 ETHERTYPE_AARP) { 838 m_adj( m, sizeof(struct ether_header) 839 + sizeof(struct llc)); 840 aarpinput(ifp, m); /* XXX */ 841 return; 842 } 843 844 default: 845 goto dropanyway; 846 } 847 break; 848 dropanyway: 849 #endif 850 default: 851 m_freem(m); 852 return; 853 } 854 #else /* ISO || LLC || NETATALK*/ 855 m_freem(m); 856 return; 857 #endif /* ISO || LLC || NETATALK*/ 858 } 859 860 if (__predict_true(pktq)) { 861 const uint32_t h = pktq_rps_hash(m); 862 if (__predict_false(!pktq_enqueue(pktq, m, h))) { 863 m_freem(m); 864 } 865 return; 866 } 867 868 if (__predict_false(!inq)) { 869 /* Should not happen. */ 870 m_freem(m); 871 return; 872 } 873 if (IF_QFULL(inq)) { 874 IF_DROP(inq); 875 m_freem(m); 876 } else { 877 IF_ENQUEUE(inq, m); 878 schednetisr(isr); 879 } 880 } 881 882 /* 883 * Convert Ethernet address to printable (loggable) representation. 884 */ 885 char * 886 ether_sprintf(const u_char *ap) 887 { 888 static char etherbuf[3 * ETHER_ADDR_LEN]; 889 return ether_snprintf(etherbuf, sizeof(etherbuf), ap); 890 } 891 892 char * 893 ether_snprintf(char *buf, size_t len, const u_char *ap) 894 { 895 char *cp = buf; 896 size_t i; 897 898 for (i = 0; i < len / 3; i++) { 899 *cp++ = hexdigits[*ap >> 4]; 900 *cp++ = hexdigits[*ap++ & 0xf]; 901 *cp++ = ':'; 902 } 903 *--cp = '\0'; 904 return buf; 905 } 906 907 /* 908 * Perform common duties while attaching to interface list 909 */ 910 void 911 ether_ifattach(struct ifnet *ifp, const uint8_t *lla) 912 { 913 struct ethercom *ec = (struct ethercom *)ifp; 914 915 ifp->if_type = IFT_ETHER; 916 ifp->if_hdrlen = ETHER_HDR_LEN; 917 ifp->if_dlt = DLT_EN10MB; 918 ifp->if_mtu = ETHERMTU; 919 ifp->if_output = ether_output; 920 ifp->_if_input = ether_input; 921 if (ifp->if_baudrate == 0) 922 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 923 924 if_set_sadl(ifp, lla, ETHER_ADDR_LEN, !ETHER_IS_LOCAL(lla)); 925 926 LIST_INIT(&ec->ec_multiaddrs); 927 ifp->if_broadcastaddr = etherbroadcastaddr; 928 bpf_attach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 929 #ifdef MBUFTRACE 930 strlcpy(ec->ec_tx_mowner.mo_name, ifp->if_xname, 931 sizeof(ec->ec_tx_mowner.mo_name)); 932 strlcpy(ec->ec_tx_mowner.mo_descr, "tx", 933 sizeof(ec->ec_tx_mowner.mo_descr)); 934 strlcpy(ec->ec_rx_mowner.mo_name, ifp->if_xname, 935 sizeof(ec->ec_rx_mowner.mo_name)); 936 strlcpy(ec->ec_rx_mowner.mo_descr, "rx", 937 sizeof(ec->ec_rx_mowner.mo_descr)); 938 MOWNER_ATTACH(&ec->ec_tx_mowner); 939 MOWNER_ATTACH(&ec->ec_rx_mowner); 940 ifp->if_mowner = &ec->ec_tx_mowner; 941 #endif 942 } 943 944 void 945 ether_ifdetach(struct ifnet *ifp) 946 { 947 struct ethercom *ec = (void *) ifp; 948 struct ether_multi *enm; 949 int s; 950 951 /* 952 * Prevent further calls to ioctl (for example turning off 953 * promiscuous mode from the bridge code), which eventually can 954 * call if_init() which can cause panics because the interface 955 * is in the process of being detached. Return device not configured 956 * instead. 957 */ 958 ifp->if_ioctl = (int (*)(struct ifnet *, u_long, void *))enxio; 959 960 #if NBRIDGE > 0 961 if (ifp->if_bridge) 962 bridge_ifdetach(ifp); 963 #endif 964 965 bpf_detach(ifp); 966 967 #if NVLAN > 0 968 if (ec->ec_nvlans) 969 vlan_ifdetach(ifp); 970 #endif 971 972 s = splnet(); 973 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 974 LIST_REMOVE(enm, enm_list); 975 free(enm, M_IFMADDR); 976 ec->ec_multicnt--; 977 } 978 splx(s); 979 980 ifp->if_mowner = NULL; 981 MOWNER_DETACH(&ec->ec_rx_mowner); 982 MOWNER_DETACH(&ec->ec_tx_mowner); 983 } 984 985 #if 0 986 /* 987 * This is for reference. We have a table-driven version 988 * of the little-endian crc32 generator, which is faster 989 * than the double-loop. 990 */ 991 uint32_t 992 ether_crc32_le(const uint8_t *buf, size_t len) 993 { 994 uint32_t c, crc, carry; 995 size_t i, j; 996 997 crc = 0xffffffffU; /* initial value */ 998 999 for (i = 0; i < len; i++) { 1000 c = buf[i]; 1001 for (j = 0; j < 8; j++) { 1002 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1003 crc >>= 1; 1004 c >>= 1; 1005 if (carry) 1006 crc = (crc ^ ETHER_CRC_POLY_LE); 1007 } 1008 } 1009 1010 return (crc); 1011 } 1012 #else 1013 uint32_t 1014 ether_crc32_le(const uint8_t *buf, size_t len) 1015 { 1016 static const uint32_t crctab[] = { 1017 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1018 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1019 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1020 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1021 }; 1022 uint32_t crc; 1023 size_t i; 1024 1025 crc = 0xffffffffU; /* initial value */ 1026 1027 for (i = 0; i < len; i++) { 1028 crc ^= buf[i]; 1029 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1030 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1031 } 1032 1033 return (crc); 1034 } 1035 #endif 1036 1037 uint32_t 1038 ether_crc32_be(const uint8_t *buf, size_t len) 1039 { 1040 uint32_t c, crc, carry; 1041 size_t i, j; 1042 1043 crc = 0xffffffffU; /* initial value */ 1044 1045 for (i = 0; i < len; i++) { 1046 c = buf[i]; 1047 for (j = 0; j < 8; j++) { 1048 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1049 crc <<= 1; 1050 c >>= 1; 1051 if (carry) 1052 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1053 } 1054 } 1055 1056 return (crc); 1057 } 1058 1059 #ifdef INET 1060 const uint8_t ether_ipmulticast_min[ETHER_ADDR_LEN] = 1061 { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1062 const uint8_t ether_ipmulticast_max[ETHER_ADDR_LEN] = 1063 { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1064 #endif 1065 #ifdef INET6 1066 const uint8_t ether_ip6multicast_min[ETHER_ADDR_LEN] = 1067 { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1068 const uint8_t ether_ip6multicast_max[ETHER_ADDR_LEN] = 1069 { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1070 #endif 1071 1072 /* 1073 * ether_aton implementation, not using a static buffer. 1074 */ 1075 int 1076 ether_aton_r(u_char *dest, size_t len, const char *str) 1077 { 1078 const u_char *cp = (const void *)str; 1079 u_char *ep; 1080 1081 #define atox(c) (((c) <= '9') ? ((c) - '0') : ((toupper(c) - 'A') + 10)) 1082 1083 if (len < ETHER_ADDR_LEN) 1084 return ENOSPC; 1085 1086 ep = dest + ETHER_ADDR_LEN; 1087 1088 while (*cp) { 1089 if (!isxdigit(*cp)) 1090 return EINVAL; 1091 *dest = atox(*cp); 1092 cp++; 1093 if (isxdigit(*cp)) { 1094 *dest = (*dest << 4) | atox(*cp); 1095 dest++; 1096 cp++; 1097 } else 1098 dest++; 1099 if (dest == ep) 1100 return *cp == '\0' ? 0 : ENAMETOOLONG; 1101 switch (*cp) { 1102 case ':': 1103 case '-': 1104 case '.': 1105 cp++; 1106 break; 1107 } 1108 } 1109 return ENOBUFS; 1110 } 1111 1112 /* 1113 * Convert a sockaddr into an Ethernet address or range of Ethernet 1114 * addresses. 1115 */ 1116 int 1117 ether_multiaddr(const struct sockaddr *sa, uint8_t addrlo[ETHER_ADDR_LEN], 1118 uint8_t addrhi[ETHER_ADDR_LEN]) 1119 { 1120 #ifdef INET 1121 const struct sockaddr_in *sin; 1122 #endif /* INET */ 1123 #ifdef INET6 1124 const struct sockaddr_in6 *sin6; 1125 #endif /* INET6 */ 1126 1127 switch (sa->sa_family) { 1128 1129 case AF_UNSPEC: 1130 memcpy(addrlo, sa->sa_data, ETHER_ADDR_LEN); 1131 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1132 break; 1133 1134 #ifdef INET 1135 case AF_INET: 1136 sin = satocsin(sa); 1137 if (sin->sin_addr.s_addr == INADDR_ANY) { 1138 /* 1139 * An IP address of INADDR_ANY means listen to 1140 * or stop listening to all of the Ethernet 1141 * multicast addresses used for IP. 1142 * (This is for the sake of IP multicast routers.) 1143 */ 1144 memcpy(addrlo, ether_ipmulticast_min, ETHER_ADDR_LEN); 1145 memcpy(addrhi, ether_ipmulticast_max, ETHER_ADDR_LEN); 1146 } 1147 else { 1148 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1149 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1150 } 1151 break; 1152 #endif 1153 #ifdef INET6 1154 case AF_INET6: 1155 sin6 = satocsin6(sa); 1156 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1157 /* 1158 * An IP6 address of 0 means listen to or stop 1159 * listening to all of the Ethernet multicast 1160 * address used for IP6. 1161 * (This is used for multicast routers.) 1162 */ 1163 memcpy(addrlo, ether_ip6multicast_min, ETHER_ADDR_LEN); 1164 memcpy(addrhi, ether_ip6multicast_max, ETHER_ADDR_LEN); 1165 } else { 1166 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1167 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1168 } 1169 break; 1170 #endif 1171 1172 default: 1173 return EAFNOSUPPORT; 1174 } 1175 return 0; 1176 } 1177 1178 /* 1179 * Add an Ethernet multicast address or range of addresses to the list for a 1180 * given interface. 1181 */ 1182 int 1183 ether_addmulti(const struct sockaddr *sa, struct ethercom *ec) 1184 { 1185 struct ether_multi *enm; 1186 u_char addrlo[ETHER_ADDR_LEN]; 1187 u_char addrhi[ETHER_ADDR_LEN]; 1188 int s = splnet(), error; 1189 1190 error = ether_multiaddr(sa, addrlo, addrhi); 1191 if (error != 0) { 1192 splx(s); 1193 return error; 1194 } 1195 1196 /* 1197 * Verify that we have valid Ethernet multicast addresses. 1198 */ 1199 if (!ETHER_IS_MULTICAST(addrlo) || !ETHER_IS_MULTICAST(addrhi)) { 1200 splx(s); 1201 return EINVAL; 1202 } 1203 /* 1204 * See if the address range is already in the list. 1205 */ 1206 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1207 if (enm != NULL) { 1208 /* 1209 * Found it; just increment the reference count. 1210 */ 1211 ++enm->enm_refcount; 1212 splx(s); 1213 return 0; 1214 } 1215 /* 1216 * New address or range; malloc a new multicast record 1217 * and link it into the interface's multicast list. 1218 */ 1219 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1220 if (enm == NULL) { 1221 splx(s); 1222 return ENOBUFS; 1223 } 1224 memcpy(enm->enm_addrlo, addrlo, 6); 1225 memcpy(enm->enm_addrhi, addrhi, 6); 1226 enm->enm_refcount = 1; 1227 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1228 ec->ec_multicnt++; 1229 splx(s); 1230 /* 1231 * Return ENETRESET to inform the driver that the list has changed 1232 * and its reception filter should be adjusted accordingly. 1233 */ 1234 return ENETRESET; 1235 } 1236 1237 /* 1238 * Delete a multicast address record. 1239 */ 1240 int 1241 ether_delmulti(const struct sockaddr *sa, struct ethercom *ec) 1242 { 1243 struct ether_multi *enm; 1244 u_char addrlo[ETHER_ADDR_LEN]; 1245 u_char addrhi[ETHER_ADDR_LEN]; 1246 int s = splnet(), error; 1247 1248 error = ether_multiaddr(sa, addrlo, addrhi); 1249 if (error != 0) { 1250 splx(s); 1251 return (error); 1252 } 1253 1254 /* 1255 * Look ur the address in our list. 1256 */ 1257 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1258 if (enm == NULL) { 1259 splx(s); 1260 return (ENXIO); 1261 } 1262 if (--enm->enm_refcount != 0) { 1263 /* 1264 * Still some claims to this record. 1265 */ 1266 splx(s); 1267 return (0); 1268 } 1269 /* 1270 * No remaining claims to this record; unlink and free it. 1271 */ 1272 LIST_REMOVE(enm, enm_list); 1273 free(enm, M_IFMADDR); 1274 ec->ec_multicnt--; 1275 splx(s); 1276 /* 1277 * Return ENETRESET to inform the driver that the list has changed 1278 * and its reception filter should be adjusted accordingly. 1279 */ 1280 return (ENETRESET); 1281 } 1282 1283 void 1284 ether_set_ifflags_cb(struct ethercom *ec, ether_cb_t cb) 1285 { 1286 ec->ec_ifflags_cb = cb; 1287 } 1288 1289 /* 1290 * Common ioctls for Ethernet interfaces. Note, we must be 1291 * called at splnet(). 1292 */ 1293 int 1294 ether_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1295 { 1296 struct ethercom *ec = (void *) ifp; 1297 struct eccapreq *eccr; 1298 struct ifreq *ifr = (struct ifreq *)data; 1299 struct if_laddrreq *iflr = data; 1300 const struct sockaddr_dl *sdl; 1301 static const uint8_t zero[ETHER_ADDR_LEN]; 1302 int error; 1303 1304 switch (cmd) { 1305 case SIOCINITIFADDR: 1306 { 1307 struct ifaddr *ifa = (struct ifaddr *)data; 1308 if (ifa->ifa_addr->sa_family != AF_LINK 1309 && (ifp->if_flags & (IFF_UP|IFF_RUNNING)) != 1310 (IFF_UP|IFF_RUNNING)) { 1311 ifp->if_flags |= IFF_UP; 1312 if ((error = (*ifp->if_init)(ifp)) != 0) 1313 return error; 1314 } 1315 #ifdef INET 1316 if (ifa->ifa_addr->sa_family == AF_INET) 1317 arp_ifinit(ifp, ifa); 1318 #endif /* INET */ 1319 return 0; 1320 } 1321 1322 case SIOCSIFMTU: 1323 { 1324 int maxmtu; 1325 1326 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1327 maxmtu = ETHERMTU_JUMBO; 1328 else 1329 maxmtu = ETHERMTU; 1330 1331 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1332 return EINVAL; 1333 else if ((error = ifioctl_common(ifp, cmd, data)) != ENETRESET) 1334 return error; 1335 else if (ifp->if_flags & IFF_UP) { 1336 /* Make sure the device notices the MTU change. */ 1337 return (*ifp->if_init)(ifp); 1338 } else 1339 return 0; 1340 } 1341 1342 case SIOCSIFFLAGS: 1343 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1344 return error; 1345 switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) { 1346 case IFF_RUNNING: 1347 /* 1348 * If interface is marked down and it is running, 1349 * then stop and disable it. 1350 */ 1351 (*ifp->if_stop)(ifp, 1); 1352 break; 1353 case IFF_UP: 1354 /* 1355 * If interface is marked up and it is stopped, then 1356 * start it. 1357 */ 1358 return (*ifp->if_init)(ifp); 1359 case IFF_UP|IFF_RUNNING: 1360 error = 0; 1361 if (ec->ec_ifflags_cb == NULL || 1362 (error = (*ec->ec_ifflags_cb)(ec)) == ENETRESET) { 1363 /* 1364 * Reset the interface to pick up 1365 * changes in any other flags that 1366 * affect the hardware state. 1367 */ 1368 return (*ifp->if_init)(ifp); 1369 } else 1370 return error; 1371 case 0: 1372 break; 1373 } 1374 return 0; 1375 case SIOCGETHERCAP: 1376 eccr = (struct eccapreq *)data; 1377 eccr->eccr_capabilities = ec->ec_capabilities; 1378 eccr->eccr_capenable = ec->ec_capenable; 1379 return 0; 1380 case SIOCADDMULTI: 1381 return ether_addmulti(ifreq_getaddr(cmd, ifr), ec); 1382 case SIOCDELMULTI: 1383 return ether_delmulti(ifreq_getaddr(cmd, ifr), ec); 1384 case SIOCSIFMEDIA: 1385 case SIOCGIFMEDIA: 1386 if (ec->ec_mii == NULL) 1387 return ENOTTY; 1388 return ifmedia_ioctl(ifp, ifr, &ec->ec_mii->mii_media, cmd); 1389 case SIOCALIFADDR: 1390 sdl = satocsdl(sstocsa(&iflr->addr)); 1391 if (sdl->sdl_family != AF_LINK) 1392 ; 1393 else if (ETHER_IS_MULTICAST(CLLADDR(sdl))) 1394 return EINVAL; 1395 else if (memcmp(zero, CLLADDR(sdl), sizeof(zero)) == 0) 1396 return EINVAL; 1397 /*FALLTHROUGH*/ 1398 default: 1399 return ifioctl_common(ifp, cmd, data); 1400 } 1401 return 0; 1402 } 1403 1404 /* 1405 * Enable/disable passing VLAN packets if the parent interface supports it. 1406 * Return: 1407 * 0: Ok 1408 * -1: Parent interface does not support vlans 1409 * >0: Error 1410 */ 1411 int 1412 ether_enable_vlan_mtu(struct ifnet *ifp) 1413 { 1414 int error; 1415 struct ethercom *ec = (void *)ifp; 1416 1417 /* Already have VLAN's do nothing. */ 1418 if (ec->ec_nvlans != 0) 1419 return 0; 1420 1421 /* Parent does not support VLAN's */ 1422 if ((ec->ec_capabilities & ETHERCAP_VLAN_MTU) == 0) 1423 return -1; 1424 1425 /* 1426 * Parent supports the VLAN_MTU capability, 1427 * i.e. can Tx/Rx larger than ETHER_MAX_LEN frames; 1428 * enable it. 1429 */ 1430 ec->ec_capenable |= ETHERCAP_VLAN_MTU; 1431 1432 /* Interface is down, defer for later */ 1433 if ((ifp->if_flags & IFF_UP) == 0) 1434 return 0; 1435 1436 if ((error = if_flags_set(ifp, ifp->if_flags)) == 0) 1437 return 0; 1438 1439 ec->ec_capenable &= ~ETHERCAP_VLAN_MTU; 1440 return error; 1441 } 1442 1443 int 1444 ether_disable_vlan_mtu(struct ifnet *ifp) 1445 { 1446 int error; 1447 struct ethercom *ec = (void *)ifp; 1448 1449 /* We still have VLAN's, defer for later */ 1450 if (ec->ec_nvlans != 0) 1451 return 0; 1452 1453 /* Parent does not support VLAB's, nothing to do. */ 1454 if ((ec->ec_capenable & ETHERCAP_VLAN_MTU) == 0) 1455 return -1; 1456 1457 /* 1458 * Disable Tx/Rx of VLAN-sized frames. 1459 */ 1460 ec->ec_capenable &= ~ETHERCAP_VLAN_MTU; 1461 1462 /* Interface is down, defer for later */ 1463 if ((ifp->if_flags & IFF_UP) == 0) 1464 return 0; 1465 1466 if ((error = if_flags_set(ifp, ifp->if_flags)) == 0) 1467 return 0; 1468 1469 ec->ec_capenable |= ETHERCAP_VLAN_MTU; 1470 return error; 1471 } 1472 1473 static int 1474 ether_multicast_sysctl(SYSCTLFN_ARGS) 1475 { 1476 struct ether_multi *enm; 1477 struct ether_multi_sysctl addr; 1478 struct ifnet *ifp; 1479 struct ethercom *ec; 1480 int error; 1481 size_t written; 1482 1483 if (namelen != 1) 1484 return EINVAL; 1485 1486 ifp = if_byindex(name[0]); 1487 if (ifp == NULL) 1488 return ENODEV; 1489 if (ifp->if_type != IFT_ETHER) { 1490 *oldlenp = 0; 1491 return 0; 1492 } 1493 ec = (struct ethercom *)ifp; 1494 1495 if (oldp == NULL) { 1496 *oldlenp = ec->ec_multicnt * sizeof(addr); 1497 return 0; 1498 } 1499 1500 memset(&addr, 0, sizeof(addr)); 1501 error = 0; 1502 written = 0; 1503 1504 LIST_FOREACH(enm, &ec->ec_multiaddrs, enm_list) { 1505 if (written + sizeof(addr) > *oldlenp) 1506 break; 1507 addr.enm_refcount = enm->enm_refcount; 1508 memcpy(addr.enm_addrlo, enm->enm_addrlo, ETHER_ADDR_LEN); 1509 memcpy(addr.enm_addrhi, enm->enm_addrhi, ETHER_ADDR_LEN); 1510 error = sysctl_copyout(l, &addr, oldp, sizeof(addr)); 1511 if (error) 1512 break; 1513 written += sizeof(addr); 1514 oldp = (char *)oldp + sizeof(addr); 1515 } 1516 1517 *oldlenp = written; 1518 return error; 1519 } 1520 1521 SYSCTL_SETUP(sysctl_net_ether_setup, "sysctl net.ether subtree setup") 1522 { 1523 const struct sysctlnode *rnode = NULL; 1524 1525 sysctl_createv(clog, 0, NULL, &rnode, 1526 CTLFLAG_PERMANENT, 1527 CTLTYPE_NODE, "ether", 1528 SYSCTL_DESCR("Ethernet-specific information"), 1529 NULL, 0, NULL, 0, 1530 CTL_NET, CTL_CREATE, CTL_EOL); 1531 1532 sysctl_createv(clog, 0, &rnode, NULL, 1533 CTLFLAG_PERMANENT, 1534 CTLTYPE_NODE, "multicast", 1535 SYSCTL_DESCR("multicast addresses"), 1536 ether_multicast_sysctl, 0, NULL, 0, 1537 CTL_CREATE, CTL_EOL); 1538 } 1539 1540 void 1541 etherinit(void) 1542 { 1543 mutex_init(&bigpktpps_lock, MUTEX_DEFAULT, IPL_NET); 1544 } 1545
Indexes created Tue Sep 23 22:09:46 GMT 2025