if_ethersubr.c revision 1.216
1 /* $NetBSD: if_ethersubr.c,v 1.216 2016/02/09 08:32:12 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 1.216 2016/02/09 08:32:12 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)) != 0) 247 return error == EWOULDBLOCK ? 0 : error; 248 /* If broadcasting on a simplex interface, loopback a copy */ 249 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 250 mcopy = m_copy(m, 0, (int)M_COPYALL); 251 etype = htons(ETHERTYPE_IP); 252 break; 253 254 case AF_ARP: 255 ah = mtod(m, struct arphdr *); 256 if (m->m_flags & M_BCAST) 257 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 258 else { 259 void *tha = ar_tha(ah); 260 261 if (tha == NULL) { 262 /* fake with ARPHDR_IEEE1394 */ 263 return 0; 264 } 265 memcpy(edst, tha, sizeof(edst)); 266 } 267 268 ah->ar_hrd = htons(ARPHRD_ETHER); 269 270 switch (ntohs(ah->ar_op)) { 271 case ARPOP_REVREQUEST: 272 case ARPOP_REVREPLY: 273 etype = htons(ETHERTYPE_REVARP); 274 break; 275 276 case ARPOP_REQUEST: 277 case ARPOP_REPLY: 278 default: 279 etype = htons(ETHERTYPE_ARP); 280 } 281 282 break; 283 #endif 284 #ifdef INET6 285 case AF_INET6: 286 if (!nd6_storelladdr(ifp, rt, m, dst, edst, sizeof(edst))){ 287 /* something bad happened */ 288 return (0); 289 } 290 etype = htons(ETHERTYPE_IPV6); 291 break; 292 #endif 293 #ifdef NETATALK 294 case AF_APPLETALK: 295 if (aarpresolve(ifp, m, (const struct sockaddr_at *)dst, edst)) { 296 #ifdef NETATALKDEBUG 297 printf("aarpresolv failed\n"); 298 #endif /* NETATALKDEBUG */ 299 return (0); 300 } 301 /* 302 * ifaddr is the first thing in at_ifaddr 303 */ 304 aa = (struct at_ifaddr *) at_ifawithnet( 305 (const struct sockaddr_at *)dst, ifp); 306 if (aa == NULL) 307 goto bad; 308 309 /* 310 * In the phase 2 case, we need to prepend an mbuf for the 311 * llc header. Since we must preserve the value of m, 312 * which is passed to us by value, we m_copy() the first 313 * mbuf, and use it for our llc header. 314 */ 315 if (aa->aa_flags & AFA_PHASE2) { 316 struct llc llc; 317 318 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 319 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 320 llc.llc_control = LLC_UI; 321 memcpy(llc.llc_snap_org_code, at_org_code, 322 sizeof(llc.llc_snap_org_code)); 323 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 324 memcpy(mtod(m, void *), &llc, sizeof(struct llc)); 325 } else { 326 etype = htons(ETHERTYPE_ATALK); 327 } 328 break; 329 #endif /* NETATALK */ 330 case pseudo_AF_HDRCMPLT: 331 hdrcmplt = 1; 332 memcpy(esrc, 333 ((const struct ether_header *)dst->sa_data)->ether_shost, 334 sizeof(esrc)); 335 /* FALLTHROUGH */ 336 337 case AF_UNSPEC: 338 memcpy(edst, 339 ((const struct ether_header *)dst->sa_data)->ether_dhost, 340 sizeof(edst)); 341 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 342 etype = ((const struct ether_header *)dst->sa_data)->ether_type; 343 break; 344 345 default: 346 printf("%s: can't handle af%d\n", ifp->if_xname, 347 dst->sa_family); 348 senderr(EAFNOSUPPORT); 349 } 350 351 #ifdef MPLS 352 { 353 struct m_tag *mtag; 354 mtag = m_tag_find(m, PACKET_TAG_MPLS, NULL); 355 if (mtag != NULL) { 356 /* Having the tag itself indicates it's MPLS */ 357 etype = htons(ETHERTYPE_MPLS); 358 m_tag_delete(m, mtag); 359 } 360 } 361 #endif 362 363 if (mcopy) 364 (void)looutput(ifp, mcopy, dst, rt); 365 366 /* If no ether type is set, this must be a 802.2 formatted packet. 367 */ 368 if (etype == 0) 369 etype = htons(m->m_pkthdr.len); 370 /* 371 * Add local net header. If no space in first mbuf, 372 * allocate another. 373 */ 374 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 375 if (m == 0) 376 senderr(ENOBUFS); 377 eh = mtod(m, struct ether_header *); 378 /* Note: etype is already in network byte order. */ 379 (void)memcpy(&eh->ether_type, &etype, sizeof(eh->ether_type)); 380 memcpy(eh->ether_dhost, edst, sizeof(edst)); 381 if (hdrcmplt) 382 memcpy(eh->ether_shost, esrc, sizeof(eh->ether_shost)); 383 else 384 memcpy(eh->ether_shost, CLLADDR(ifp->if_sadl), 385 sizeof(eh->ether_shost)); 386 387 #if NCARP > 0 388 if (ifp0 != ifp && ifp0->if_type == IFT_CARP) { 389 memcpy(eh->ether_shost, CLLADDR(ifp0->if_sadl), 390 sizeof(eh->ether_shost)); 391 } 392 #endif /* NCARP > 0 */ 393 394 if ((error = pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 395 return (error); 396 if (m == NULL) 397 return (0); 398 399 #if NBRIDGE > 0 400 /* 401 * Bridges require special output handling. 402 */ 403 if (ifp->if_bridge) 404 return (bridge_output(ifp, m, NULL, NULL)); 405 #endif 406 407 #if NCARP > 0 408 if (ifp != ifp0) 409 ifp0->if_obytes += m->m_pkthdr.len + ETHER_HDR_LEN; 410 #endif /* NCARP > 0 */ 411 412 #ifdef ALTQ 413 /* 414 * If ALTQ is enabled on the parent interface, do 415 * classification; the queueing discipline might not 416 * require classification, but might require the 417 * address family/header pointer in the pktattr. 418 */ 419 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 420 altq_etherclassify(&ifp->if_snd, m, &pktattr); 421 #endif 422 return ifq_enqueue(ifp, m ALTQ_COMMA ALTQ_DECL(&pktattr)); 423 424 bad: 425 if (m) 426 m_freem(m); 427 return (error); 428 } 429 430 #ifdef ALTQ 431 /* 432 * This routine is a slight hack to allow a packet to be classified 433 * if the Ethernet headers are present. It will go away when ALTQ's 434 * classification engine understands link headers. 435 */ 436 void 437 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m, 438 struct altq_pktattr *pktattr) 439 { 440 struct ether_header *eh; 441 uint16_t ether_type; 442 int hlen, af, hdrsize; 443 void *hdr; 444 445 hlen = ETHER_HDR_LEN; 446 eh = mtod(m, struct ether_header *); 447 448 ether_type = htons(eh->ether_type); 449 450 if (ether_type < ETHERMTU) { 451 /* LLC/SNAP */ 452 struct llc *llc = (struct llc *)(eh + 1); 453 hlen += 8; 454 455 if (m->m_len < hlen || 456 llc->llc_dsap != LLC_SNAP_LSAP || 457 llc->llc_ssap != LLC_SNAP_LSAP || 458 llc->llc_control != LLC_UI) { 459 /* Not SNAP. */ 460 goto bad; 461 } 462 463 ether_type = htons(llc->llc_un.type_snap.ether_type); 464 } 465 466 switch (ether_type) { 467 case ETHERTYPE_IP: 468 af = AF_INET; 469 hdrsize = 20; /* sizeof(struct ip) */ 470 break; 471 472 case ETHERTYPE_IPV6: 473 af = AF_INET6; 474 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 475 break; 476 477 default: 478 af = AF_UNSPEC; 479 hdrsize = 0; 480 break; 481 } 482 483 while (m->m_len <= hlen) { 484 hlen -= m->m_len; 485 m = m->m_next; 486 } 487 if (m->m_len < (hlen + hdrsize)) { 488 /* 489 * protocol header not in a single mbuf. 490 * We can't cope with this situation right 491 * now (but it shouldn't ever happen, really, anyhow). 492 */ 493 #ifdef DEBUG 494 printf("altq_etherclassify: headers span multiple mbufs: " 495 "%d < %d\n", m->m_len, (hlen + hdrsize)); 496 #endif 497 goto bad; 498 } 499 500 m->m_data += hlen; 501 m->m_len -= hlen; 502 503 hdr = mtod(m, void *); 504 505 if (ALTQ_NEEDS_CLASSIFY(ifq)) 506 pktattr->pattr_class = 507 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 508 pktattr->pattr_af = af; 509 pktattr->pattr_hdr = hdr; 510 511 m->m_data -= hlen; 512 m->m_len += hlen; 513 514 return; 515 516 bad: 517 pktattr->pattr_class = NULL; 518 pktattr->pattr_hdr = NULL; 519 pktattr->pattr_af = AF_UNSPEC; 520 } 521 #endif /* ALTQ */ 522 523 /* 524 * Process a received Ethernet packet; 525 * the packet is in the mbuf chain m with 526 * the ether header. 527 */ 528 void 529 ether_input(struct ifnet *ifp, struct mbuf *m) 530 { 531 struct ethercom *ec = (struct ethercom *) ifp; 532 pktqueue_t *pktq = NULL; 533 struct ifqueue *inq = NULL; 534 uint16_t etype; 535 struct ether_header *eh; 536 size_t ehlen; 537 static int earlypkts; 538 int isr = 0; 539 #if defined (LLC) || defined(NETATALK) 540 struct llc *l; 541 #endif 542 543 KASSERT(!cpu_intr_p()); 544 545 if ((ifp->if_flags & IFF_UP) == 0) { 546 m_freem(m); 547 return; 548 } 549 550 #ifdef MBUFTRACE 551 m_claimm(m, &ec->ec_rx_mowner); 552 #endif 553 eh = mtod(m, struct ether_header *); 554 etype = ntohs(eh->ether_type); 555 ehlen = sizeof(*eh); 556 557 if(__predict_false(earlypkts < 100 || !rnd_initial_entropy)) { 558 rnd_add_data(NULL, eh, ehlen, 0); 559 earlypkts++; 560 } 561 562 /* 563 * Determine if the packet is within its size limits. 564 */ 565 if (etype != ETHERTYPE_MPLS && m->m_pkthdr.len > 566 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 567 mutex_enter(&bigpktpps_lock); 568 if (ppsratecheck(&bigpktppslim_last, &bigpktpps_count, 569 bigpktppslim)) { 570 printf("%s: discarding oversize frame (len=%d)\n", 571 ifp->if_xname, m->m_pkthdr.len); 572 } 573 mutex_exit(&bigpktpps_lock); 574 m_freem(m); 575 return; 576 } 577 578 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 579 /* 580 * If this is not a simplex interface, drop the packet 581 * if it came from us. 582 */ 583 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 584 memcmp(CLLADDR(ifp->if_sadl), eh->ether_shost, 585 ETHER_ADDR_LEN) == 0) { 586 m_freem(m); 587 return; 588 } 589 590 if (memcmp(etherbroadcastaddr, 591 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 592 m->m_flags |= M_BCAST; 593 else 594 m->m_flags |= M_MCAST; 595 ifp->if_imcasts++; 596 } 597 598 /* If the CRC is still on the packet, trim it off. */ 599 if (m->m_flags & M_HASFCS) { 600 m_adj(m, -ETHER_CRC_LEN); 601 m->m_flags &= ~M_HASFCS; 602 } 603 604 ifp->if_ibytes += m->m_pkthdr.len; 605 606 #if NCARP > 0 607 if (__predict_false(ifp->if_carp && ifp->if_type != IFT_CARP)) { 608 /* 609 * clear M_PROMISC, in case the packets comes from a 610 * vlan 611 */ 612 m->m_flags &= ~M_PROMISC; 613 if (carp_input(m, (uint8_t *)&eh->ether_shost, 614 (uint8_t *)&eh->ether_dhost, eh->ether_type) == 0) 615 return; 616 } 617 #endif /* NCARP > 0 */ 618 if ((m->m_flags & (M_BCAST|M_MCAST|M_PROMISC)) == 0 && 619 (ifp->if_flags & IFF_PROMISC) != 0 && 620 memcmp(CLLADDR(ifp->if_sadl), eh->ether_dhost, 621 ETHER_ADDR_LEN) != 0) { 622 m->m_flags |= M_PROMISC; 623 } 624 625 if ((m->m_flags & M_PROMISC) == 0) { 626 if (pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 627 return; 628 if (m == NULL) 629 return; 630 631 eh = mtod(m, struct ether_header *); 632 etype = ntohs(eh->ether_type); 633 ehlen = sizeof(*eh); 634 } 635 636 #if NAGR > 0 637 if (ifp->if_agrprivate && 638 __predict_true(etype != ETHERTYPE_SLOWPROTOCOLS)) { 639 m->m_flags &= ~M_PROMISC; 640 agr_input(ifp, m); 641 return; 642 } 643 #endif /* NAGR > 0 */ 644 645 /* 646 * If VLANs are configured on the interface, check to 647 * see if the device performed the decapsulation and 648 * provided us with the tag. 649 */ 650 if (ec->ec_nvlans && m_tag_find(m, PACKET_TAG_VLAN, NULL) != NULL) { 651 #if NVLAN > 0 652 /* 653 * vlan_input() will either recursively call ether_input() 654 * or drop the packet. 655 */ 656 vlan_input(ifp, m); 657 #else 658 m_freem(m); 659 #endif 660 return; 661 } 662 663 /* 664 * Handle protocols that expect to have the Ethernet header 665 * (and possibly FCS) intact. 666 */ 667 switch (etype) { 668 case ETHERTYPE_VLAN: { 669 struct ether_vlan_header *evl = (void *)eh; 670 /* 671 * If there is a tag of 0, then the VLAN header was probably 672 * just being used to store the priority. Extract the ether 673 * type, and if IP or IPV6, let them deal with it. 674 */ 675 if (m->m_len <= sizeof(*evl) 676 && EVL_VLANOFTAG(evl->evl_tag) == 0) { 677 etype = ntohs(evl->evl_proto); 678 ehlen = sizeof(*evl); 679 if ((m->m_flags & M_PROMISC) == 0 680 && (etype == ETHERTYPE_IP 681 || etype == ETHERTYPE_IPV6)) 682 break; 683 } 684 #if NVLAN > 0 685 /* 686 * vlan_input() will either recursively call ether_input() 687 * or drop the packet. 688 */ 689 if (((struct ethercom *)ifp)->ec_nvlans != 0) 690 vlan_input(ifp, m); 691 else 692 #endif /* NVLAN > 0 */ 693 m_freem(m); 694 return; 695 } 696 #if NPPPOE > 0 697 case ETHERTYPE_PPPOEDISC: 698 case ETHERTYPE_PPPOE: 699 if (m->m_flags & M_PROMISC) { 700 m_freem(m); 701 return; 702 } 703 #ifndef PPPOE_SERVER 704 if (m->m_flags & (M_MCAST | M_BCAST)) { 705 m_freem(m); 706 return; 707 } 708 #endif 709 710 if (etype == ETHERTYPE_PPPOEDISC) 711 inq = &ppoediscinq; 712 else 713 inq = &ppoeinq; 714 if (IF_QFULL(inq)) { 715 IF_DROP(inq); 716 m_freem(m); 717 } else { 718 IF_ENQUEUE(inq, m); 719 softint_schedule(pppoe_softintr); 720 } 721 return; 722 #endif /* NPPPOE > 0 */ 723 case ETHERTYPE_SLOWPROTOCOLS: { 724 uint8_t subtype; 725 726 #if defined(DIAGNOSTIC) 727 if (m->m_pkthdr.len < sizeof(*eh) + sizeof(subtype)) { 728 panic("ether_input: too short slow protocol packet"); 729 } 730 #endif 731 m_copydata(m, sizeof(*eh), sizeof(subtype), &subtype); 732 switch (subtype) { 733 #if NAGR > 0 734 case SLOWPROTOCOLS_SUBTYPE_LACP: 735 if (ifp->if_agrprivate) { 736 ieee8023ad_lacp_input(ifp, m); 737 return; 738 } 739 break; 740 741 case SLOWPROTOCOLS_SUBTYPE_MARKER: 742 if (ifp->if_agrprivate) { 743 ieee8023ad_marker_input(ifp, m); 744 return; 745 } 746 break; 747 #endif /* NAGR > 0 */ 748 default: 749 if (subtype == 0 || subtype > 10) { 750 /* illegal value */ 751 m_freem(m); 752 return; 753 } 754 /* unknown subtype */ 755 break; 756 } 757 /* FALLTHROUGH */ 758 } 759 default: 760 if (m->m_flags & M_PROMISC) { 761 m_freem(m); 762 return; 763 } 764 } 765 766 /* If the CRC is still on the packet, trim it off. */ 767 if (m->m_flags & M_HASFCS) { 768 m_adj(m, -ETHER_CRC_LEN); 769 m->m_flags &= ~M_HASFCS; 770 } 771 772 if (etype > ETHERMTU + sizeof (struct ether_header)) { 773 /* Strip off the Ethernet header. */ 774 m_adj(m, ehlen); 775 776 switch (etype) { 777 #ifdef INET 778 case ETHERTYPE_IP: 779 #ifdef GATEWAY 780 if (ipflow_fastforward(m)) 781 return; 782 #endif 783 pktq = ip_pktq; 784 break; 785 786 case ETHERTYPE_ARP: 787 isr = NETISR_ARP; 788 inq = &arpintrq; 789 break; 790 791 case ETHERTYPE_REVARP: 792 revarpinput(m); /* XXX queue? */ 793 return; 794 #endif 795 #ifdef INET6 796 case ETHERTYPE_IPV6: 797 if (__predict_false(!in6_present)) { 798 m_freem(m); 799 return; 800 } 801 #ifdef GATEWAY 802 if (ip6flow_fastforward(&m)) 803 return; 804 #endif 805 pktq = ip6_pktq; 806 break; 807 #endif 808 #ifdef NETATALK 809 case ETHERTYPE_ATALK: 810 isr = NETISR_ATALK; 811 inq = &atintrq1; 812 break; 813 case ETHERTYPE_AARP: 814 /* probably this should be done with a NETISR as well */ 815 aarpinput(ifp, m); /* XXX */ 816 return; 817 #endif /* NETATALK */ 818 #ifdef MPLS 819 case ETHERTYPE_MPLS: 820 isr = NETISR_MPLS; 821 inq = &mplsintrq; 822 break; 823 #endif 824 default: 825 m_freem(m); 826 return; 827 } 828 } else { 829 #if defined (LLC) || defined (NETATALK) 830 l = (struct llc *)(eh+1); 831 switch (l->llc_dsap) { 832 #ifdef NETATALK 833 case LLC_SNAP_LSAP: 834 switch (l->llc_control) { 835 case LLC_UI: 836 if (l->llc_ssap != LLC_SNAP_LSAP) { 837 goto dropanyway; 838 } 839 840 if (memcmp(&(l->llc_snap_org_code)[0], 841 at_org_code, sizeof(at_org_code)) == 0 && 842 ntohs(l->llc_snap_ether_type) == 843 ETHERTYPE_ATALK) { 844 inq = &atintrq2; 845 m_adj(m, sizeof(struct ether_header) 846 + sizeof(struct llc)); 847 isr = NETISR_ATALK; 848 break; 849 } 850 851 if (memcmp(&(l->llc_snap_org_code)[0], 852 aarp_org_code, 853 sizeof(aarp_org_code)) == 0 && 854 ntohs(l->llc_snap_ether_type) == 855 ETHERTYPE_AARP) { 856 m_adj( m, sizeof(struct ether_header) 857 + sizeof(struct llc)); 858 aarpinput(ifp, m); /* XXX */ 859 return; 860 } 861 862 default: 863 goto dropanyway; 864 } 865 break; 866 dropanyway: 867 #endif 868 default: 869 m_freem(m); 870 return; 871 } 872 #else /* ISO || LLC || NETATALK*/ 873 m_freem(m); 874 return; 875 #endif /* ISO || LLC || NETATALK*/ 876 } 877 878 if (__predict_true(pktq)) { 879 const uint32_t h = pktq_rps_hash(m); 880 if (__predict_false(!pktq_enqueue(pktq, m, h))) { 881 m_freem(m); 882 } 883 return; 884 } 885 886 if (__predict_false(!inq)) { 887 /* Should not happen. */ 888 m_freem(m); 889 return; 890 } 891 if (IF_QFULL(inq)) { 892 IF_DROP(inq); 893 m_freem(m); 894 } else { 895 IF_ENQUEUE(inq, m); 896 schednetisr(isr); 897 } 898 } 899 900 /* 901 * Convert Ethernet address to printable (loggable) representation. 902 */ 903 char * 904 ether_sprintf(const u_char *ap) 905 { 906 static char etherbuf[3 * ETHER_ADDR_LEN]; 907 return ether_snprintf(etherbuf, sizeof(etherbuf), ap); 908 } 909 910 char * 911 ether_snprintf(char *buf, size_t len, const u_char *ap) 912 { 913 char *cp = buf; 914 size_t i; 915 916 for (i = 0; i < len / 3; i++) { 917 *cp++ = hexdigits[*ap >> 4]; 918 *cp++ = hexdigits[*ap++ & 0xf]; 919 *cp++ = ':'; 920 } 921 *--cp = '\0'; 922 return buf; 923 } 924 925 /* 926 * Perform common duties while attaching to interface list 927 */ 928 void 929 ether_ifattach(struct ifnet *ifp, const uint8_t *lla) 930 { 931 struct ethercom *ec = (struct ethercom *)ifp; 932 933 ifp->if_type = IFT_ETHER; 934 ifp->if_hdrlen = ETHER_HDR_LEN; 935 ifp->if_dlt = DLT_EN10MB; 936 ifp->if_mtu = ETHERMTU; 937 ifp->if_output = ether_output; 938 ifp->_if_input = ether_input; 939 if (ifp->if_baudrate == 0) 940 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 941 942 if_set_sadl(ifp, lla, ETHER_ADDR_LEN, !ETHER_IS_LOCAL(lla)); 943 944 LIST_INIT(&ec->ec_multiaddrs); 945 ifp->if_broadcastaddr = etherbroadcastaddr; 946 bpf_attach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 947 #ifdef MBUFTRACE 948 strlcpy(ec->ec_tx_mowner.mo_name, ifp->if_xname, 949 sizeof(ec->ec_tx_mowner.mo_name)); 950 strlcpy(ec->ec_tx_mowner.mo_descr, "tx", 951 sizeof(ec->ec_tx_mowner.mo_descr)); 952 strlcpy(ec->ec_rx_mowner.mo_name, ifp->if_xname, 953 sizeof(ec->ec_rx_mowner.mo_name)); 954 strlcpy(ec->ec_rx_mowner.mo_descr, "rx", 955 sizeof(ec->ec_rx_mowner.mo_descr)); 956 MOWNER_ATTACH(&ec->ec_tx_mowner); 957 MOWNER_ATTACH(&ec->ec_rx_mowner); 958 ifp->if_mowner = &ec->ec_tx_mowner; 959 #endif 960 } 961 962 void 963 ether_ifdetach(struct ifnet *ifp) 964 { 965 struct ethercom *ec = (void *) ifp; 966 struct ether_multi *enm; 967 int s; 968 969 /* 970 * Prevent further calls to ioctl (for example turning off 971 * promiscuous mode from the bridge code), which eventually can 972 * call if_init() which can cause panics because the interface 973 * is in the process of being detached. Return device not configured 974 * instead. 975 */ 976 ifp->if_ioctl = (int (*)(struct ifnet *, u_long, void *))enxio; 977 978 #if NBRIDGE > 0 979 if (ifp->if_bridge) 980 bridge_ifdetach(ifp); 981 #endif 982 983 bpf_detach(ifp); 984 985 #if NVLAN > 0 986 if (ec->ec_nvlans) 987 vlan_ifdetach(ifp); 988 #endif 989 990 s = splnet(); 991 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 992 LIST_REMOVE(enm, enm_list); 993 free(enm, M_IFMADDR); 994 ec->ec_multicnt--; 995 } 996 splx(s); 997 998 ifp->if_mowner = NULL; 999 MOWNER_DETACH(&ec->ec_rx_mowner); 1000 MOWNER_DETACH(&ec->ec_tx_mowner); 1001 } 1002 1003 #if 0 1004 /* 1005 * This is for reference. We have a table-driven version 1006 * of the little-endian crc32 generator, which is faster 1007 * than the double-loop. 1008 */ 1009 uint32_t 1010 ether_crc32_le(const uint8_t *buf, size_t len) 1011 { 1012 uint32_t c, crc, carry; 1013 size_t i, j; 1014 1015 crc = 0xffffffffU; /* initial value */ 1016 1017 for (i = 0; i < len; i++) { 1018 c = buf[i]; 1019 for (j = 0; j < 8; j++) { 1020 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1021 crc >>= 1; 1022 c >>= 1; 1023 if (carry) 1024 crc = (crc ^ ETHER_CRC_POLY_LE); 1025 } 1026 } 1027 1028 return (crc); 1029 } 1030 #else 1031 uint32_t 1032 ether_crc32_le(const uint8_t *buf, size_t len) 1033 { 1034 static const uint32_t crctab[] = { 1035 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1036 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1037 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1038 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1039 }; 1040 uint32_t crc; 1041 size_t i; 1042 1043 crc = 0xffffffffU; /* initial value */ 1044 1045 for (i = 0; i < len; i++) { 1046 crc ^= buf[i]; 1047 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1048 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1049 } 1050 1051 return (crc); 1052 } 1053 #endif 1054 1055 uint32_t 1056 ether_crc32_be(const uint8_t *buf, size_t len) 1057 { 1058 uint32_t c, crc, carry; 1059 size_t i, j; 1060 1061 crc = 0xffffffffU; /* initial value */ 1062 1063 for (i = 0; i < len; i++) { 1064 c = buf[i]; 1065 for (j = 0; j < 8; j++) { 1066 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1067 crc <<= 1; 1068 c >>= 1; 1069 if (carry) 1070 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1071 } 1072 } 1073 1074 return (crc); 1075 } 1076 1077 #ifdef INET 1078 const uint8_t ether_ipmulticast_min[ETHER_ADDR_LEN] = 1079 { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1080 const uint8_t ether_ipmulticast_max[ETHER_ADDR_LEN] = 1081 { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1082 #endif 1083 #ifdef INET6 1084 const uint8_t ether_ip6multicast_min[ETHER_ADDR_LEN] = 1085 { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1086 const uint8_t ether_ip6multicast_max[ETHER_ADDR_LEN] = 1087 { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1088 #endif 1089 1090 /* 1091 * ether_aton implementation, not using a static buffer. 1092 */ 1093 int 1094 ether_aton_r(u_char *dest, size_t len, const char *str) 1095 { 1096 const u_char *cp = (const void *)str; 1097 u_char *ep; 1098 1099 #define atox(c) (((c) <= '9') ? ((c) - '0') : ((toupper(c) - 'A') + 10)) 1100 1101 if (len < ETHER_ADDR_LEN) 1102 return ENOSPC; 1103 1104 ep = dest + ETHER_ADDR_LEN; 1105 1106 while (*cp) { 1107 if (!isxdigit(*cp)) 1108 return EINVAL; 1109 *dest = atox(*cp); 1110 cp++; 1111 if (isxdigit(*cp)) { 1112 *dest = (*dest << 4) | atox(*cp); 1113 dest++; 1114 cp++; 1115 } else 1116 dest++; 1117 if (dest == ep) 1118 return *cp == '\0' ? 0 : ENAMETOOLONG; 1119 switch (*cp) { 1120 case ':': 1121 case '-': 1122 case '.': 1123 cp++; 1124 break; 1125 } 1126 } 1127 return ENOBUFS; 1128 } 1129 1130 /* 1131 * Convert a sockaddr into an Ethernet address or range of Ethernet 1132 * addresses. 1133 */ 1134 int 1135 ether_multiaddr(const struct sockaddr *sa, uint8_t addrlo[ETHER_ADDR_LEN], 1136 uint8_t addrhi[ETHER_ADDR_LEN]) 1137 { 1138 #ifdef INET 1139 const struct sockaddr_in *sin; 1140 #endif /* INET */ 1141 #ifdef INET6 1142 const struct sockaddr_in6 *sin6; 1143 #endif /* INET6 */ 1144 1145 switch (sa->sa_family) { 1146 1147 case AF_UNSPEC: 1148 memcpy(addrlo, sa->sa_data, ETHER_ADDR_LEN); 1149 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1150 break; 1151 1152 #ifdef INET 1153 case AF_INET: 1154 sin = satocsin(sa); 1155 if (sin->sin_addr.s_addr == INADDR_ANY) { 1156 /* 1157 * An IP address of INADDR_ANY means listen to 1158 * or stop listening to all of the Ethernet 1159 * multicast addresses used for IP. 1160 * (This is for the sake of IP multicast routers.) 1161 */ 1162 memcpy(addrlo, ether_ipmulticast_min, ETHER_ADDR_LEN); 1163 memcpy(addrhi, ether_ipmulticast_max, ETHER_ADDR_LEN); 1164 } 1165 else { 1166 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1167 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1168 } 1169 break; 1170 #endif 1171 #ifdef INET6 1172 case AF_INET6: 1173 sin6 = satocsin6(sa); 1174 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1175 /* 1176 * An IP6 address of 0 means listen to or stop 1177 * listening to all of the Ethernet multicast 1178 * address used for IP6. 1179 * (This is used for multicast routers.) 1180 */ 1181 memcpy(addrlo, ether_ip6multicast_min, ETHER_ADDR_LEN); 1182 memcpy(addrhi, ether_ip6multicast_max, ETHER_ADDR_LEN); 1183 } else { 1184 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1185 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1186 } 1187 break; 1188 #endif 1189 1190 default: 1191 return EAFNOSUPPORT; 1192 } 1193 return 0; 1194 } 1195 1196 /* 1197 * Add an Ethernet multicast address or range of addresses to the list for a 1198 * given interface. 1199 */ 1200 int 1201 ether_addmulti(const struct sockaddr *sa, struct ethercom *ec) 1202 { 1203 struct ether_multi *enm; 1204 u_char addrlo[ETHER_ADDR_LEN]; 1205 u_char addrhi[ETHER_ADDR_LEN]; 1206 int s = splnet(), error; 1207 1208 error = ether_multiaddr(sa, addrlo, addrhi); 1209 if (error != 0) { 1210 splx(s); 1211 return error; 1212 } 1213 1214 /* 1215 * Verify that we have valid Ethernet multicast addresses. 1216 */ 1217 if (!ETHER_IS_MULTICAST(addrlo) || !ETHER_IS_MULTICAST(addrhi)) { 1218 splx(s); 1219 return EINVAL; 1220 } 1221 /* 1222 * See if the address range is already in the list. 1223 */ 1224 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1225 if (enm != NULL) { 1226 /* 1227 * Found it; just increment the reference count. 1228 */ 1229 ++enm->enm_refcount; 1230 splx(s); 1231 return 0; 1232 } 1233 /* 1234 * New address or range; malloc a new multicast record 1235 * and link it into the interface's multicast list. 1236 */ 1237 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1238 if (enm == NULL) { 1239 splx(s); 1240 return ENOBUFS; 1241 } 1242 memcpy(enm->enm_addrlo, addrlo, 6); 1243 memcpy(enm->enm_addrhi, addrhi, 6); 1244 enm->enm_refcount = 1; 1245 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1246 ec->ec_multicnt++; 1247 splx(s); 1248 /* 1249 * Return ENETRESET to inform the driver that the list has changed 1250 * and its reception filter should be adjusted accordingly. 1251 */ 1252 return ENETRESET; 1253 } 1254 1255 /* 1256 * Delete a multicast address record. 1257 */ 1258 int 1259 ether_delmulti(const struct sockaddr *sa, struct ethercom *ec) 1260 { 1261 struct ether_multi *enm; 1262 u_char addrlo[ETHER_ADDR_LEN]; 1263 u_char addrhi[ETHER_ADDR_LEN]; 1264 int s = splnet(), error; 1265 1266 error = ether_multiaddr(sa, addrlo, addrhi); 1267 if (error != 0) { 1268 splx(s); 1269 return (error); 1270 } 1271 1272 /* 1273 * Look ur the address in our list. 1274 */ 1275 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1276 if (enm == NULL) { 1277 splx(s); 1278 return (ENXIO); 1279 } 1280 if (--enm->enm_refcount != 0) { 1281 /* 1282 * Still some claims to this record. 1283 */ 1284 splx(s); 1285 return (0); 1286 } 1287 /* 1288 * No remaining claims to this record; unlink and free it. 1289 */ 1290 LIST_REMOVE(enm, enm_list); 1291 free(enm, M_IFMADDR); 1292 ec->ec_multicnt--; 1293 splx(s); 1294 /* 1295 * Return ENETRESET to inform the driver that the list has changed 1296 * and its reception filter should be adjusted accordingly. 1297 */ 1298 return (ENETRESET); 1299 } 1300 1301 void 1302 ether_set_ifflags_cb(struct ethercom *ec, ether_cb_t cb) 1303 { 1304 ec->ec_ifflags_cb = cb; 1305 } 1306 1307 /* 1308 * Common ioctls for Ethernet interfaces. Note, we must be 1309 * called at splnet(). 1310 */ 1311 int 1312 ether_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1313 { 1314 struct ethercom *ec = (void *) ifp; 1315 struct eccapreq *eccr; 1316 struct ifreq *ifr = (struct ifreq *)data; 1317 struct if_laddrreq *iflr = data; 1318 const struct sockaddr_dl *sdl; 1319 static const uint8_t zero[ETHER_ADDR_LEN]; 1320 int error; 1321 1322 switch (cmd) { 1323 case SIOCINITIFADDR: 1324 { 1325 struct ifaddr *ifa = (struct ifaddr *)data; 1326 if (ifa->ifa_addr->sa_family != AF_LINK 1327 && (ifp->if_flags & (IFF_UP|IFF_RUNNING)) != 1328 (IFF_UP|IFF_RUNNING)) { 1329 ifp->if_flags |= IFF_UP; 1330 if ((error = (*ifp->if_init)(ifp)) != 0) 1331 return error; 1332 } 1333 #ifdef INET 1334 if (ifa->ifa_addr->sa_family == AF_INET) 1335 arp_ifinit(ifp, ifa); 1336 #endif /* INET */ 1337 return 0; 1338 } 1339 1340 case SIOCSIFMTU: 1341 { 1342 int maxmtu; 1343 1344 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1345 maxmtu = ETHERMTU_JUMBO; 1346 else 1347 maxmtu = ETHERMTU; 1348 1349 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1350 return EINVAL; 1351 else if ((error = ifioctl_common(ifp, cmd, data)) != ENETRESET) 1352 return error; 1353 else if (ifp->if_flags & IFF_UP) { 1354 /* Make sure the device notices the MTU change. */ 1355 return (*ifp->if_init)(ifp); 1356 } else 1357 return 0; 1358 } 1359 1360 case SIOCSIFFLAGS: 1361 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1362 return error; 1363 switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) { 1364 case IFF_RUNNING: 1365 /* 1366 * If interface is marked down and it is running, 1367 * then stop and disable it. 1368 */ 1369 (*ifp->if_stop)(ifp, 1); 1370 break; 1371 case IFF_UP: 1372 /* 1373 * If interface is marked up and it is stopped, then 1374 * start it. 1375 */ 1376 return (*ifp->if_init)(ifp); 1377 case IFF_UP|IFF_RUNNING: 1378 error = 0; 1379 if (ec->ec_ifflags_cb == NULL || 1380 (error = (*ec->ec_ifflags_cb)(ec)) == ENETRESET) { 1381 /* 1382 * Reset the interface to pick up 1383 * changes in any other flags that 1384 * affect the hardware state. 1385 */ 1386 return (*ifp->if_init)(ifp); 1387 } else 1388 return error; 1389 case 0: 1390 break; 1391 } 1392 return 0; 1393 case SIOCGETHERCAP: 1394 eccr = (struct eccapreq *)data; 1395 eccr->eccr_capabilities = ec->ec_capabilities; 1396 eccr->eccr_capenable = ec->ec_capenable; 1397 return 0; 1398 case SIOCADDMULTI: 1399 return ether_addmulti(ifreq_getaddr(cmd, ifr), ec); 1400 case SIOCDELMULTI: 1401 return ether_delmulti(ifreq_getaddr(cmd, ifr), ec); 1402 case SIOCSIFMEDIA: 1403 case SIOCGIFMEDIA: 1404 if (ec->ec_mii == NULL) 1405 return ENOTTY; 1406 return ifmedia_ioctl(ifp, ifr, &ec->ec_mii->mii_media, cmd); 1407 case SIOCALIFADDR: 1408 sdl = satocsdl(sstocsa(&iflr->addr)); 1409 if (sdl->sdl_family != AF_LINK) 1410 ; 1411 else if (ETHER_IS_MULTICAST(CLLADDR(sdl))) 1412 return EINVAL; 1413 else if (memcmp(zero, CLLADDR(sdl), sizeof(zero)) == 0) 1414 return EINVAL; 1415 /*FALLTHROUGH*/ 1416 default: 1417 return ifioctl_common(ifp, cmd, data); 1418 } 1419 return 0; 1420 } 1421 1422 /* 1423 * Enable/disable passing VLAN packets if the parent interface supports it. 1424 * Return: 1425 * 0: Ok 1426 * -1: Parent interface does not support vlans 1427 * >0: Error 1428 */ 1429 int 1430 ether_enable_vlan_mtu(struct ifnet *ifp) 1431 { 1432 int error; 1433 struct ethercom *ec = (void *)ifp; 1434 1435 /* Already have VLAN's do nothing. */ 1436 if (ec->ec_nvlans != 0) 1437 return 0; 1438 1439 /* Parent does not support VLAN's */ 1440 if ((ec->ec_capabilities & ETHERCAP_VLAN_MTU) == 0) 1441 return -1; 1442 1443 /* 1444 * Parent supports the VLAN_MTU capability, 1445 * i.e. can Tx/Rx larger than ETHER_MAX_LEN frames; 1446 * enable it. 1447 */ 1448 ec->ec_capenable |= ETHERCAP_VLAN_MTU; 1449 1450 /* Interface is down, defer for later */ 1451 if ((ifp->if_flags & IFF_UP) == 0) 1452 return 0; 1453 1454 if ((error = if_flags_set(ifp, ifp->if_flags)) == 0) 1455 return 0; 1456 1457 ec->ec_capenable &= ~ETHERCAP_VLAN_MTU; 1458 return error; 1459 } 1460 1461 int 1462 ether_disable_vlan_mtu(struct ifnet *ifp) 1463 { 1464 int error; 1465 struct ethercom *ec = (void *)ifp; 1466 1467 /* We still have VLAN's, defer for later */ 1468 if (ec->ec_nvlans != 0) 1469 return 0; 1470 1471 /* Parent does not support VLAB's, nothing to do. */ 1472 if ((ec->ec_capenable & ETHERCAP_VLAN_MTU) == 0) 1473 return -1; 1474 1475 /* 1476 * Disable Tx/Rx of VLAN-sized frames. 1477 */ 1478 ec->ec_capenable &= ~ETHERCAP_VLAN_MTU; 1479 1480 /* Interface is down, defer for later */ 1481 if ((ifp->if_flags & IFF_UP) == 0) 1482 return 0; 1483 1484 if ((error = if_flags_set(ifp, ifp->if_flags)) == 0) 1485 return 0; 1486 1487 ec->ec_capenable |= ETHERCAP_VLAN_MTU; 1488 return error; 1489 } 1490 1491 static int 1492 ether_multicast_sysctl(SYSCTLFN_ARGS) 1493 { 1494 struct ether_multi *enm; 1495 struct ether_multi_sysctl addr; 1496 struct ifnet *ifp; 1497 struct ethercom *ec; 1498 int error; 1499 size_t written; 1500 1501 if (namelen != 1) 1502 return EINVAL; 1503 1504 ifp = if_byindex(name[0]); 1505 if (ifp == NULL) 1506 return ENODEV; 1507 if (ifp->if_type != IFT_ETHER) { 1508 *oldlenp = 0; 1509 return 0; 1510 } 1511 ec = (struct ethercom *)ifp; 1512 1513 if (oldp == NULL) { 1514 *oldlenp = ec->ec_multicnt * sizeof(addr); 1515 return 0; 1516 } 1517 1518 memset(&addr, 0, sizeof(addr)); 1519 error = 0; 1520 written = 0; 1521 1522 LIST_FOREACH(enm, &ec->ec_multiaddrs, enm_list) { 1523 if (written + sizeof(addr) > *oldlenp) 1524 break; 1525 addr.enm_refcount = enm->enm_refcount; 1526 memcpy(addr.enm_addrlo, enm->enm_addrlo, ETHER_ADDR_LEN); 1527 memcpy(addr.enm_addrhi, enm->enm_addrhi, ETHER_ADDR_LEN); 1528 error = sysctl_copyout(l, &addr, oldp, sizeof(addr)); 1529 if (error) 1530 break; 1531 written += sizeof(addr); 1532 oldp = (char *)oldp + sizeof(addr); 1533 } 1534 1535 *oldlenp = written; 1536 return error; 1537 } 1538 1539 SYSCTL_SETUP(sysctl_net_ether_setup, "sysctl net.ether subtree setup") 1540 { 1541 const struct sysctlnode *rnode = NULL; 1542 1543 sysctl_createv(clog, 0, NULL, &rnode, 1544 CTLFLAG_PERMANENT, 1545 CTLTYPE_NODE, "ether", 1546 SYSCTL_DESCR("Ethernet-specific information"), 1547 NULL, 0, NULL, 0, 1548 CTL_NET, CTL_CREATE, CTL_EOL); 1549 1550 sysctl_createv(clog, 0, &rnode, NULL, 1551 CTLFLAG_PERMANENT, 1552 CTLTYPE_NODE, "multicast", 1553 SYSCTL_DESCR("multicast addresses"), 1554 ether_multicast_sysctl, 0, NULL, 0, 1555 CTL_CREATE, CTL_EOL); 1556 } 1557 1558 void 1559 etherinit(void) 1560 { 1561 mutex_init(&bigpktpps_lock, MUTEX_DEFAULT, IPL_NET); 1562 } 1563
Indexes created Tue Sep 23 02:09:52 GMT 2025