if_ethersubr.c revision 1.205.2.2
1 /* $NetBSD: if_ethersubr.c,v 1.205.2.2 2015/06/06 14:40:25 skrll 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 1.205.2.2 2015/06/06 14:40:25 skrll Exp $"); 65 66 #include "opt_inet.h" 67 #include "opt_atalk.h" 68 #include "opt_mbuftrace.h" 69 #include "opt_mpls.h" 70 #include "opt_gateway.h" 71 #include "opt_pppoe.h" 72 #include "opt_net_mpsafe.h" 73 #include "vlan.h" 74 #include "pppoe.h" 75 #include "bridge.h" 76 #include "arp.h" 77 #include "agr.h" 78 79 #include <sys/param.h> 80 #include <sys/systm.h> 81 #include <sys/sysctl.h> 82 #include <sys/kernel.h> 83 #include <sys/callout.h> 84 #include <sys/malloc.h> 85 #include <sys/mbuf.h> 86 #include <sys/protosw.h> 87 #include <sys/socket.h> 88 #include <sys/ioctl.h> 89 #include <sys/errno.h> 90 #include <sys/syslog.h> 91 #include <sys/kauth.h> 92 #include <sys/cpu.h> 93 #include <sys/intr.h> 94 #include <sys/device.h> 95 #include <sys/rnd.h> 96 #include <sys/rndsource.h> 97 98 #include <net/if.h> 99 #include <net/netisr.h> 100 #include <net/route.h> 101 #include <net/if_llc.h> 102 #include <net/if_dl.h> 103 #include <net/if_types.h> 104 105 #include <net/if_media.h> 106 #include <dev/mii/mii.h> 107 #include <dev/mii/miivar.h> 108 109 #if NARP == 0 110 /* 111 * XXX there should really be a way to issue this warning from within config(8) 112 */ 113 #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. 114 #endif 115 116 #include <net/bpf.h> 117 118 #include <net/if_ether.h> 119 #include <net/if_vlanvar.h> 120 121 #if NPPPOE > 0 122 #include <net/if_pppoe.h> 123 #endif 124 125 #if NAGR > 0 126 #include <net/agr/ieee8023_slowprotocols.h> /* XXX */ 127 #include <net/agr/ieee8023ad.h> 128 #include <net/agr/if_agrvar.h> 129 #endif 130 131 #if NBRIDGE > 0 132 #include <net/if_bridgevar.h> 133 #endif 134 135 #include <netinet/in.h> 136 #ifdef INET 137 #include <netinet/in_var.h> 138 #endif 139 #include <netinet/if_inarp.h> 140 141 #ifdef INET6 142 #ifndef INET 143 #include <netinet/in.h> 144 #endif 145 #include <netinet6/in6_var.h> 146 #include <netinet6/nd6.h> 147 #endif 148 149 150 #include "carp.h" 151 #if NCARP > 0 152 #include <netinet/ip_carp.h> 153 #endif 154 155 #ifdef NETATALK 156 #include <netatalk/at.h> 157 #include <netatalk/at_var.h> 158 #include <netatalk/at_extern.h> 159 160 #define llc_snap_org_code llc_un.type_snap.org_code 161 #define llc_snap_ether_type llc_un.type_snap.ether_type 162 163 extern u_char at_org_code[3]; 164 extern u_char aarp_org_code[3]; 165 #endif /* NETATALK */ 166 167 #ifdef MPLS 168 #include <netmpls/mpls.h> 169 #include <netmpls/mpls_var.h> 170 #endif 171 172 static struct timeval bigpktppslim_last; 173 static int bigpktppslim = 2; /* XXX */ 174 static int bigpktpps_count; 175 static kmutex_t bigpktpps_lock __cacheline_aligned; 176 177 178 const uint8_t etherbroadcastaddr[ETHER_ADDR_LEN] = 179 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 180 const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] = 181 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 }; 182 #define senderr(e) { error = (e); goto bad;} 183 184 static int ether_output(struct ifnet *, struct mbuf *, 185 const struct sockaddr *, struct rtentry *); 186 187 /* 188 * Ethernet output routine. 189 * Encapsulate a packet of type family for the local net. 190 * Assumes that ifp is actually pointer to ethercom structure. 191 */ 192 static int 193 ether_output(struct ifnet * const ifp0, struct mbuf * const m0, 194 const struct sockaddr * const dst, 195 struct rtentry *rt) 196 { 197 uint16_t etype = 0; 198 int error = 0, hdrcmplt = 0; 199 uint8_t esrc[6], edst[6]; 200 struct mbuf *m = m0; 201 struct mbuf *mcopy = NULL; 202 struct ether_header *eh; 203 struct ifnet *ifp = ifp0; 204 ALTQ_DECL(struct altq_pktattr pktattr;) 205 #ifdef INET 206 struct arphdr *ah; 207 #endif /* INET */ 208 #ifdef NETATALK 209 struct at_ifaddr *aa; 210 #endif /* NETATALK */ 211 212 #ifndef NET_MPSAFE 213 KASSERT(KERNEL_LOCKED_P()); 214 #endif 215 216 #ifdef MBUFTRACE 217 m_claimm(m, ifp->if_mowner); 218 #endif 219 220 #if NCARP > 0 221 if (ifp->if_type == IFT_CARP) { 222 struct ifaddr *ifa; 223 224 /* loop back if this is going to the carp interface */ 225 if (dst != NULL && ifp0->if_link_state == LINK_STATE_UP && 226 (ifa = ifa_ifwithaddr(dst)) != NULL && 227 ifa->ifa_ifp == ifp0) 228 return looutput(ifp0, m, dst, rt); 229 230 ifp = ifp->if_carpdev; 231 /* ac = (struct arpcom *)ifp; */ 232 233 if ((ifp0->if_flags & (IFF_UP|IFF_RUNNING)) != 234 (IFF_UP|IFF_RUNNING)) 235 senderr(ENETDOWN); 236 } 237 #endif /* NCARP > 0 */ 238 239 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 240 senderr(ENETDOWN); 241 242 switch (dst->sa_family) { 243 244 #ifdef INET 245 case AF_INET: 246 if (m->m_flags & M_BCAST) 247 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 248 else if (m->m_flags & M_MCAST) 249 ETHER_MAP_IP_MULTICAST(&satocsin(dst)->sin_addr, edst); 250 else if (!arpresolve(ifp, rt, m, dst, edst)) 251 return (0); /* if not yet resolved */ 252 /* If broadcasting on a simplex interface, loopback a copy */ 253 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 254 mcopy = m_copy(m, 0, (int)M_COPYALL); 255 etype = htons(ETHERTYPE_IP); 256 break; 257 258 case AF_ARP: 259 ah = mtod(m, struct arphdr *); 260 if (m->m_flags & M_BCAST) 261 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 262 else { 263 void *tha = ar_tha(ah); 264 265 if (tha == NULL) { 266 /* fake with ARPHDR_IEEE1394 */ 267 return 0; 268 } 269 memcpy(edst, tha, sizeof(edst)); 270 } 271 272 ah->ar_hrd = htons(ARPHRD_ETHER); 273 274 switch (ntohs(ah->ar_op)) { 275 case ARPOP_REVREQUEST: 276 case ARPOP_REVREPLY: 277 etype = htons(ETHERTYPE_REVARP); 278 break; 279 280 case ARPOP_REQUEST: 281 case ARPOP_REPLY: 282 default: 283 etype = htons(ETHERTYPE_ARP); 284 } 285 286 break; 287 #endif 288 #ifdef INET6 289 case AF_INET6: 290 if (!nd6_storelladdr(ifp, rt, m, dst, edst, sizeof(edst))){ 291 /* something bad happened */ 292 return (0); 293 } 294 etype = htons(ETHERTYPE_IPV6); 295 break; 296 #endif 297 #ifdef NETATALK 298 case AF_APPLETALK: 299 if (!aarpresolve(ifp, m, (const struct sockaddr_at *)dst, edst)) { 300 #ifdef NETATALKDEBUG 301 printf("aarpresolv failed\n"); 302 #endif /* NETATALKDEBUG */ 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 goto bad; 312 313 /* 314 * In the phase 2 case, we need to prepend an mbuf for the 315 * llc header. Since we must preserve the value of m, 316 * which is passed to us by value, we m_copy() the first 317 * mbuf, and use it for our llc header. 318 */ 319 if (aa->aa_flags & AFA_PHASE2) { 320 struct llc llc; 321 322 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 323 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 324 llc.llc_control = LLC_UI; 325 memcpy(llc.llc_snap_org_code, at_org_code, 326 sizeof(llc.llc_snap_org_code)); 327 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 328 memcpy(mtod(m, void *), &llc, sizeof(struct llc)); 329 } else { 330 etype = htons(ETHERTYPE_ATALK); 331 } 332 break; 333 #endif /* NETATALK */ 334 case pseudo_AF_HDRCMPLT: 335 hdrcmplt = 1; 336 memcpy(esrc, 337 ((const struct ether_header *)dst->sa_data)->ether_shost, 338 sizeof(esrc)); 339 /* FALLTHROUGH */ 340 341 case AF_UNSPEC: 342 memcpy(edst, 343 ((const struct ether_header *)dst->sa_data)->ether_dhost, 344 sizeof(edst)); 345 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 346 etype = ((const struct ether_header *)dst->sa_data)->ether_type; 347 break; 348 349 default: 350 printf("%s: can't handle af%d\n", ifp->if_xname, 351 dst->sa_family); 352 senderr(EAFNOSUPPORT); 353 } 354 355 #ifdef MPLS 356 { 357 struct m_tag *mtag; 358 mtag = m_tag_find(m, PACKET_TAG_MPLS, NULL); 359 if (mtag != NULL) { 360 /* Having the tag itself indicates it's MPLS */ 361 etype = htons(ETHERTYPE_MPLS); 362 m_tag_delete(m, mtag); 363 } 364 } 365 #endif 366 367 if (mcopy) 368 (void)looutput(ifp, mcopy, dst, rt); 369 370 /* If no ether type is set, this must be a 802.2 formatted packet. 371 */ 372 if (etype == 0) 373 etype = htons(m->m_pkthdr.len); 374 /* 375 * Add local net header. If no space in first mbuf, 376 * allocate another. 377 */ 378 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 379 if (m == 0) 380 senderr(ENOBUFS); 381 eh = mtod(m, struct ether_header *); 382 /* Note: etype is already in network byte order. */ 383 (void)memcpy(&eh->ether_type, &etype, sizeof(eh->ether_type)); 384 memcpy(eh->ether_dhost, edst, sizeof(edst)); 385 if (hdrcmplt) 386 memcpy(eh->ether_shost, esrc, sizeof(eh->ether_shost)); 387 else 388 memcpy(eh->ether_shost, CLLADDR(ifp->if_sadl), 389 sizeof(eh->ether_shost)); 390 391 #if NCARP > 0 392 if (ifp0 != ifp && ifp0->if_type == IFT_CARP) { 393 memcpy(eh->ether_shost, CLLADDR(ifp0->if_sadl), 394 sizeof(eh->ether_shost)); 395 } 396 #endif /* NCARP > 0 */ 397 398 if ((error = pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 399 return (error); 400 if (m == NULL) 401 return (0); 402 403 #if NBRIDGE > 0 404 /* 405 * Bridges require special output handling. 406 */ 407 if (ifp->if_bridge) 408 return (bridge_output(ifp, m, NULL, NULL)); 409 #endif 410 411 #if NCARP > 0 412 if (ifp != ifp0) 413 ifp0->if_obytes += m->m_pkthdr.len + ETHER_HDR_LEN; 414 #endif /* NCARP > 0 */ 415 416 #ifdef ALTQ 417 /* 418 * If ALTQ is enabled on the parent interface, do 419 * classification; the queueing discipline might not 420 * require classification, but might require the 421 * address family/header pointer in the pktattr. 422 */ 423 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 424 altq_etherclassify(&ifp->if_snd, m, &pktattr); 425 #endif 426 return ifq_enqueue(ifp, m ALTQ_COMMA ALTQ_DECL(&pktattr)); 427 428 bad: 429 if (m) 430 m_freem(m); 431 return (error); 432 } 433 434 #ifdef ALTQ 435 /* 436 * This routine is a slight hack to allow a packet to be classified 437 * if the Ethernet headers are present. It will go away when ALTQ's 438 * classification engine understands link headers. 439 */ 440 void 441 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m, 442 struct altq_pktattr *pktattr) 443 { 444 struct ether_header *eh; 445 uint16_t ether_type; 446 int hlen, af, hdrsize; 447 void *hdr; 448 449 hlen = ETHER_HDR_LEN; 450 eh = mtod(m, struct ether_header *); 451 452 ether_type = htons(eh->ether_type); 453 454 if (ether_type < ETHERMTU) { 455 /* LLC/SNAP */ 456 struct llc *llc = (struct llc *)(eh + 1); 457 hlen += 8; 458 459 if (m->m_len < hlen || 460 llc->llc_dsap != LLC_SNAP_LSAP || 461 llc->llc_ssap != LLC_SNAP_LSAP || 462 llc->llc_control != LLC_UI) { 463 /* Not SNAP. */ 464 goto bad; 465 } 466 467 ether_type = htons(llc->llc_un.type_snap.ether_type); 468 } 469 470 switch (ether_type) { 471 case ETHERTYPE_IP: 472 af = AF_INET; 473 hdrsize = 20; /* sizeof(struct ip) */ 474 break; 475 476 case ETHERTYPE_IPV6: 477 af = AF_INET6; 478 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 479 break; 480 481 default: 482 af = AF_UNSPEC; 483 hdrsize = 0; 484 break; 485 } 486 487 while (m->m_len <= hlen) { 488 hlen -= m->m_len; 489 m = m->m_next; 490 } 491 if (m->m_len < (hlen + hdrsize)) { 492 /* 493 * protocol header not in a single mbuf. 494 * We can't cope with this situation right 495 * now (but it shouldn't ever happen, really, anyhow). 496 */ 497 #ifdef DEBUG 498 printf("altq_etherclassify: headers span multiple mbufs: " 499 "%d < %d\n", m->m_len, (hlen + hdrsize)); 500 #endif 501 goto bad; 502 } 503 504 m->m_data += hlen; 505 m->m_len -= hlen; 506 507 hdr = mtod(m, void *); 508 509 if (ALTQ_NEEDS_CLASSIFY(ifq)) 510 pktattr->pattr_class = 511 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 512 pktattr->pattr_af = af; 513 pktattr->pattr_hdr = hdr; 514 515 m->m_data -= hlen; 516 m->m_len += hlen; 517 518 return; 519 520 bad: 521 pktattr->pattr_class = NULL; 522 pktattr->pattr_hdr = NULL; 523 pktattr->pattr_af = AF_UNSPEC; 524 } 525 #endif /* ALTQ */ 526 527 /* 528 * Process a received Ethernet packet; 529 * the packet is in the mbuf chain m with 530 * the ether header. 531 */ 532 void 533 ether_input(struct ifnet *ifp, struct mbuf *m) 534 { 535 struct ethercom *ec = (struct ethercom *) ifp; 536 pktqueue_t *pktq = NULL; 537 struct ifqueue *inq = NULL; 538 uint16_t etype; 539 struct ether_header *eh; 540 size_t ehlen; 541 static int earlypkts; 542 int isr = 0; 543 #if defined (LLC) || defined(NETATALK) 544 struct llc *l; 545 #endif 546 547 if ((ifp->if_flags & IFF_UP) == 0) { 548 m_freem(m); 549 return; 550 } 551 552 #ifdef MBUFTRACE 553 m_claimm(m, &ec->ec_rx_mowner); 554 #endif 555 eh = mtod(m, struct ether_header *); 556 etype = ntohs(eh->ether_type); 557 ehlen = sizeof(*eh); 558 559 if(__predict_false(earlypkts < 100 || !rnd_initial_entropy)) { 560 rnd_add_data(NULL, eh, ehlen, 0); 561 earlypkts++; 562 } 563 564 /* 565 * Determine if the packet is within its size limits. 566 */ 567 if (etype != ETHERTYPE_MPLS && m->m_pkthdr.len > 568 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 569 mutex_enter(&bigpktpps_lock); 570 if (ppsratecheck(&bigpktppslim_last, &bigpktpps_count, 571 bigpktppslim)) { 572 printf("%s: discarding oversize frame (len=%d)\n", 573 ifp->if_xname, m->m_pkthdr.len); 574 } 575 mutex_exit(&bigpktpps_lock); 576 m_freem(m); 577 return; 578 } 579 580 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 581 /* 582 * If this is not a simplex interface, drop the packet 583 * if it came from us. 584 */ 585 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 586 memcmp(CLLADDR(ifp->if_sadl), eh->ether_shost, 587 ETHER_ADDR_LEN) == 0) { 588 m_freem(m); 589 return; 590 } 591 592 if (memcmp(etherbroadcastaddr, 593 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 594 m->m_flags |= M_BCAST; 595 else 596 m->m_flags |= M_MCAST; 597 ifp->if_imcasts++; 598 } 599 600 /* If the CRC is still on the packet, trim it off. */ 601 if (m->m_flags & M_HASFCS) { 602 m_adj(m, -ETHER_CRC_LEN); 603 m->m_flags &= ~M_HASFCS; 604 } 605 606 ifp->if_ibytes += m->m_pkthdr.len; 607 608 #if NCARP > 0 609 if (__predict_false(ifp->if_carp && ifp->if_type != IFT_CARP)) { 610 /* 611 * clear M_PROMISC, in case the packets comes from a 612 * vlan 613 */ 614 m->m_flags &= ~M_PROMISC; 615 if (carp_input(m, (uint8_t *)&eh->ether_shost, 616 (uint8_t *)&eh->ether_dhost, eh->ether_type) == 0) 617 return; 618 } 619 #endif /* NCARP > 0 */ 620 if ((m->m_flags & (M_BCAST|M_MCAST|M_PROMISC)) == 0 && 621 (ifp->if_flags & IFF_PROMISC) != 0 && 622 memcmp(CLLADDR(ifp->if_sadl), eh->ether_dhost, 623 ETHER_ADDR_LEN) != 0) { 624 m->m_flags |= M_PROMISC; 625 } 626 627 if ((m->m_flags & M_PROMISC) == 0) { 628 if (pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 629 return; 630 if (m == NULL) 631 return; 632 633 eh = mtod(m, struct ether_header *); 634 etype = ntohs(eh->ether_type); 635 ehlen = sizeof(*eh); 636 } 637 638 #if NAGR > 0 639 if (ifp->if_agrprivate && 640 __predict_true(etype != ETHERTYPE_SLOWPROTOCOLS)) { 641 m->m_flags &= ~M_PROMISC; 642 agr_input(ifp, m); 643 return; 644 } 645 #endif /* NAGR > 0 */ 646 647 /* 648 * If VLANs are configured on the interface, check to 649 * see if the device performed the decapsulation and 650 * provided us with the tag. 651 */ 652 if (ec->ec_nvlans && m_tag_find(m, PACKET_TAG_VLAN, NULL) != NULL) { 653 #if NVLAN > 0 654 /* 655 * vlan_input() will either recursively call ether_input() 656 * or drop the packet. 657 */ 658 vlan_input(ifp, m); 659 #else 660 m_freem(m); 661 #endif 662 return; 663 } 664 665 /* 666 * Handle protocols that expect to have the Ethernet header 667 * (and possibly FCS) intact. 668 */ 669 switch (etype) { 670 case ETHERTYPE_VLAN: { 671 struct ether_vlan_header *evl = (void *)eh; 672 /* 673 * If there is a tag of 0, then the VLAN header was probably 674 * just being used to store the priority. Extract the ether 675 * type, and if IP or IPV6, let them deal with it. 676 */ 677 if (m->m_len <= sizeof(*evl) 678 && EVL_VLANOFTAG(evl->evl_tag) == 0) { 679 etype = ntohs(evl->evl_proto); 680 ehlen = sizeof(*evl); 681 if ((m->m_flags & M_PROMISC) == 0 682 && (etype == ETHERTYPE_IP 683 || etype == ETHERTYPE_IPV6)) 684 break; 685 } 686 #if NVLAN > 0 687 /* 688 * vlan_input() will either recursively call ether_input() 689 * or drop the packet. 690 */ 691 if (((struct ethercom *)ifp)->ec_nvlans != 0) 692 vlan_input(ifp, m); 693 else 694 #endif /* NVLAN > 0 */ 695 m_freem(m); 696 return; 697 } 698 #if NPPPOE > 0 699 case ETHERTYPE_PPPOEDISC: 700 case ETHERTYPE_PPPOE: 701 if (m->m_flags & M_PROMISC) { 702 m_freem(m); 703 return; 704 } 705 #ifndef PPPOE_SERVER 706 if (m->m_flags & (M_MCAST | M_BCAST)) { 707 m_freem(m); 708 return; 709 } 710 #endif 711 712 if (etype == ETHERTYPE_PPPOEDISC) 713 inq = &ppoediscinq; 714 else 715 inq = &ppoeinq; 716 if (IF_QFULL(inq)) { 717 IF_DROP(inq); 718 m_freem(m); 719 } else { 720 IF_ENQUEUE(inq, m); 721 softint_schedule(pppoe_softintr); 722 } 723 return; 724 #endif /* NPPPOE > 0 */ 725 case ETHERTYPE_SLOWPROTOCOLS: { 726 uint8_t subtype; 727 728 #if defined(DIAGNOSTIC) 729 if (m->m_pkthdr.len < sizeof(*eh) + sizeof(subtype)) { 730 panic("ether_input: too short slow protocol packet"); 731 } 732 #endif 733 m_copydata(m, sizeof(*eh), sizeof(subtype), &subtype); 734 switch (subtype) { 735 #if NAGR > 0 736 case SLOWPROTOCOLS_SUBTYPE_LACP: 737 if (ifp->if_agrprivate) { 738 ieee8023ad_lacp_input(ifp, m); 739 return; 740 } 741 break; 742 743 case SLOWPROTOCOLS_SUBTYPE_MARKER: 744 if (ifp->if_agrprivate) { 745 ieee8023ad_marker_input(ifp, m); 746 return; 747 } 748 break; 749 #endif /* NAGR > 0 */ 750 default: 751 if (subtype == 0 || subtype > 10) { 752 /* illegal value */ 753 m_freem(m); 754 return; 755 } 756 /* unknown subtype */ 757 break; 758 } 759 /* FALLTHROUGH */ 760 } 761 default: 762 if (m->m_flags & M_PROMISC) { 763 m_freem(m); 764 return; 765 } 766 } 767 768 /* If the CRC is still on the packet, trim it off. */ 769 if (m->m_flags & M_HASFCS) { 770 m_adj(m, -ETHER_CRC_LEN); 771 m->m_flags &= ~M_HASFCS; 772 } 773 774 if (etype > ETHERMTU + sizeof (struct ether_header)) { 775 /* Strip off the Ethernet header. */ 776 m_adj(m, ehlen); 777 778 switch (etype) { 779 #ifdef INET 780 case ETHERTYPE_IP: 781 #ifdef GATEWAY 782 if (ipflow_fastforward(m)) 783 return; 784 #endif 785 pktq = ip_pktq; 786 break; 787 788 case ETHERTYPE_ARP: 789 isr = NETISR_ARP; 790 inq = &arpintrq; 791 break; 792 793 case ETHERTYPE_REVARP: 794 revarpinput(m); /* XXX queue? */ 795 return; 796 #endif 797 #ifdef INET6 798 case ETHERTYPE_IPV6: 799 if (__predict_false(!in6_present)) { 800 m_freem(m); 801 return; 802 } 803 #ifdef GATEWAY 804 if (ip6flow_fastforward(&m)) 805 return; 806 #endif 807 pktq = ip6_pktq; 808 break; 809 #endif 810 #ifdef NETATALK 811 case ETHERTYPE_ATALK: 812 isr = NETISR_ATALK; 813 inq = &atintrq1; 814 break; 815 case ETHERTYPE_AARP: 816 /* probably this should be done with a NETISR as well */ 817 aarpinput(ifp, m); /* XXX */ 818 return; 819 #endif /* NETATALK */ 820 #ifdef MPLS 821 case ETHERTYPE_MPLS: 822 isr = NETISR_MPLS; 823 inq = &mplsintrq; 824 break; 825 #endif 826 default: 827 m_freem(m); 828 return; 829 } 830 } else { 831 #if defined (LLC) || defined (NETATALK) 832 l = (struct llc *)(eh+1); 833 switch (l->llc_dsap) { 834 #ifdef NETATALK 835 case LLC_SNAP_LSAP: 836 switch (l->llc_control) { 837 case LLC_UI: 838 if (l->llc_ssap != LLC_SNAP_LSAP) { 839 goto dropanyway; 840 } 841 842 if (memcmp(&(l->llc_snap_org_code)[0], 843 at_org_code, sizeof(at_org_code)) == 0 && 844 ntohs(l->llc_snap_ether_type) == 845 ETHERTYPE_ATALK) { 846 inq = &atintrq2; 847 m_adj(m, sizeof(struct ether_header) 848 + sizeof(struct llc)); 849 isr = NETISR_ATALK; 850 break; 851 } 852 853 if (memcmp(&(l->llc_snap_org_code)[0], 854 aarp_org_code, 855 sizeof(aarp_org_code)) == 0 && 856 ntohs(l->llc_snap_ether_type) == 857 ETHERTYPE_AARP) { 858 m_adj( m, sizeof(struct ether_header) 859 + sizeof(struct llc)); 860 aarpinput(ifp, m); /* XXX */ 861 return; 862 } 863 864 default: 865 goto dropanyway; 866 } 867 break; 868 dropanyway: 869 #endif 870 default: 871 m_freem(m); 872 return; 873 } 874 #else /* ISO || LLC || NETATALK*/ 875 m_freem(m); 876 return; 877 #endif /* ISO || LLC || NETATALK*/ 878 } 879 880 if (__predict_true(pktq)) { 881 const uint32_t h = pktq_rps_hash(m); 882 if (__predict_false(!pktq_enqueue(pktq, m, h))) { 883 m_freem(m); 884 } 885 return; 886 } 887 888 if (__predict_false(!inq)) { 889 /* Should not happen. */ 890 m_freem(m); 891 return; 892 } 893 if (IF_QFULL(inq)) { 894 IF_DROP(inq); 895 m_freem(m); 896 } else { 897 IF_ENQUEUE(inq, m); 898 schednetisr(isr); 899 } 900 } 901 902 /* 903 * Convert Ethernet address to printable (loggable) representation. 904 */ 905 char * 906 ether_sprintf(const u_char *ap) 907 { 908 static char etherbuf[3 * ETHER_ADDR_LEN]; 909 return ether_snprintf(etherbuf, sizeof(etherbuf), ap); 910 } 911 912 char * 913 ether_snprintf(char *buf, size_t len, const u_char *ap) 914 { 915 char *cp = buf; 916 size_t i; 917 918 for (i = 0; i < len / 3; i++) { 919 *cp++ = hexdigits[*ap >> 4]; 920 *cp++ = hexdigits[*ap++ & 0xf]; 921 *cp++ = ':'; 922 } 923 *--cp = '\0'; 924 return buf; 925 } 926 927 /* 928 * Perform common duties while attaching to interface list 929 */ 930 void 931 ether_ifattach(struct ifnet *ifp, const uint8_t *lla) 932 { 933 struct ethercom *ec = (struct ethercom *)ifp; 934 935 ifp->if_type = IFT_ETHER; 936 ifp->if_hdrlen = ETHER_HDR_LEN; 937 ifp->if_dlt = DLT_EN10MB; 938 ifp->if_mtu = ETHERMTU; 939 ifp->if_output = ether_output; 940 ifp->if_input = ether_input; 941 if (ifp->if_baudrate == 0) 942 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 943 944 if_set_sadl(ifp, lla, ETHER_ADDR_LEN, !ETHER_IS_LOCAL(lla)); 945 946 LIST_INIT(&ec->ec_multiaddrs); 947 ifp->if_broadcastaddr = etherbroadcastaddr; 948 bpf_attach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 949 #ifdef MBUFTRACE 950 strlcpy(ec->ec_tx_mowner.mo_name, ifp->if_xname, 951 sizeof(ec->ec_tx_mowner.mo_name)); 952 strlcpy(ec->ec_tx_mowner.mo_descr, "tx", 953 sizeof(ec->ec_tx_mowner.mo_descr)); 954 strlcpy(ec->ec_rx_mowner.mo_name, ifp->if_xname, 955 sizeof(ec->ec_rx_mowner.mo_name)); 956 strlcpy(ec->ec_rx_mowner.mo_descr, "rx", 957 sizeof(ec->ec_rx_mowner.mo_descr)); 958 MOWNER_ATTACH(&ec->ec_tx_mowner); 959 MOWNER_ATTACH(&ec->ec_rx_mowner); 960 ifp->if_mowner = &ec->ec_tx_mowner; 961 #endif 962 } 963 964 void 965 ether_ifdetach(struct ifnet *ifp) 966 { 967 struct ethercom *ec = (void *) ifp; 968 struct ether_multi *enm; 969 int s; 970 971 /* 972 * Prevent further calls to ioctl (for example turning off 973 * promiscuous mode from the bridge code), which eventually can 974 * call if_init() which can cause panics because the interface 975 * is in the process of being detached. Return device not configured 976 * instead. 977 */ 978 ifp->if_ioctl = (int (*)(struct ifnet *, u_long, void *))enxio; 979 980 #if NBRIDGE > 0 981 if (ifp->if_bridge) 982 bridge_ifdetach(ifp); 983 #endif 984 985 bpf_detach(ifp); 986 987 #if NVLAN > 0 988 if (ec->ec_nvlans) 989 vlan_ifdetach(ifp); 990 #endif 991 992 s = splnet(); 993 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 994 LIST_REMOVE(enm, enm_list); 995 free(enm, M_IFMADDR); 996 ec->ec_multicnt--; 997 } 998 splx(s); 999 1000 ifp->if_mowner = NULL; 1001 MOWNER_DETACH(&ec->ec_rx_mowner); 1002 MOWNER_DETACH(&ec->ec_tx_mowner); 1003 } 1004 1005 #if 0 1006 /* 1007 * This is for reference. We have a table-driven version 1008 * of the little-endian crc32 generator, which is faster 1009 * than the double-loop. 1010 */ 1011 uint32_t 1012 ether_crc32_le(const uint8_t *buf, size_t len) 1013 { 1014 uint32_t c, crc, carry; 1015 size_t i, j; 1016 1017 crc = 0xffffffffU; /* initial value */ 1018 1019 for (i = 0; i < len; i++) { 1020 c = buf[i]; 1021 for (j = 0; j < 8; j++) { 1022 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1023 crc >>= 1; 1024 c >>= 1; 1025 if (carry) 1026 crc = (crc ^ ETHER_CRC_POLY_LE); 1027 } 1028 } 1029 1030 return (crc); 1031 } 1032 #else 1033 uint32_t 1034 ether_crc32_le(const uint8_t *buf, size_t len) 1035 { 1036 static const uint32_t crctab[] = { 1037 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1038 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1039 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1040 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1041 }; 1042 uint32_t crc; 1043 size_t i; 1044 1045 crc = 0xffffffffU; /* initial value */ 1046 1047 for (i = 0; i < len; i++) { 1048 crc ^= buf[i]; 1049 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1050 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1051 } 1052 1053 return (crc); 1054 } 1055 #endif 1056 1057 uint32_t 1058 ether_crc32_be(const uint8_t *buf, size_t len) 1059 { 1060 uint32_t c, crc, carry; 1061 size_t i, j; 1062 1063 crc = 0xffffffffU; /* initial value */ 1064 1065 for (i = 0; i < len; i++) { 1066 c = buf[i]; 1067 for (j = 0; j < 8; j++) { 1068 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1069 crc <<= 1; 1070 c >>= 1; 1071 if (carry) 1072 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1073 } 1074 } 1075 1076 return (crc); 1077 } 1078 1079 #ifdef INET 1080 const uint8_t ether_ipmulticast_min[ETHER_ADDR_LEN] = 1081 { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1082 const uint8_t ether_ipmulticast_max[ETHER_ADDR_LEN] = 1083 { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1084 #endif 1085 #ifdef INET6 1086 const uint8_t ether_ip6multicast_min[ETHER_ADDR_LEN] = 1087 { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1088 const uint8_t ether_ip6multicast_max[ETHER_ADDR_LEN] = 1089 { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1090 #endif 1091 1092 /* 1093 * ether_aton implementation, not using a static buffer. 1094 */ 1095 int 1096 ether_aton_r(u_char *dest, size_t len, const char *str) 1097 { 1098 const u_char *cp = (const void *)str; 1099 u_char *ep; 1100 1101 #define atox(c) (((c) <= '9') ? ((c) - '0') : ((toupper(c) - 'A') + 10)) 1102 1103 if (len < ETHER_ADDR_LEN) 1104 return ENOSPC; 1105 1106 ep = dest + ETHER_ADDR_LEN; 1107 1108 while (*cp) { 1109 if (!isxdigit(*cp)) 1110 return EINVAL; 1111 *dest = atox(*cp); 1112 cp++; 1113 if (isxdigit(*cp)) { 1114 *dest = (*dest << 4) | atox(*cp); 1115 dest++; 1116 cp++; 1117 } else 1118 dest++; 1119 if (dest == ep) 1120 return *cp == '\0' ? 0 : ENAMETOOLONG; 1121 switch (*cp) { 1122 case ':': 1123 case '-': 1124 case '.': 1125 cp++; 1126 break; 1127 } 1128 } 1129 return ENOBUFS; 1130 } 1131 1132 /* 1133 * Convert a sockaddr into an Ethernet address or range of Ethernet 1134 * addresses. 1135 */ 1136 int 1137 ether_multiaddr(const struct sockaddr *sa, uint8_t addrlo[ETHER_ADDR_LEN], 1138 uint8_t addrhi[ETHER_ADDR_LEN]) 1139 { 1140 #ifdef INET 1141 const struct sockaddr_in *sin; 1142 #endif /* INET */ 1143 #ifdef INET6 1144 const struct sockaddr_in6 *sin6; 1145 #endif /* INET6 */ 1146 1147 switch (sa->sa_family) { 1148 1149 case AF_UNSPEC: 1150 memcpy(addrlo, sa->sa_data, ETHER_ADDR_LEN); 1151 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1152 break; 1153 1154 #ifdef INET 1155 case AF_INET: 1156 sin = satocsin(sa); 1157 if (sin->sin_addr.s_addr == INADDR_ANY) { 1158 /* 1159 * An IP address of INADDR_ANY means listen to 1160 * or stop listening to all of the Ethernet 1161 * multicast addresses used for IP. 1162 * (This is for the sake of IP multicast routers.) 1163 */ 1164 memcpy(addrlo, ether_ipmulticast_min, ETHER_ADDR_LEN); 1165 memcpy(addrhi, ether_ipmulticast_max, ETHER_ADDR_LEN); 1166 } 1167 else { 1168 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1169 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1170 } 1171 break; 1172 #endif 1173 #ifdef INET6 1174 case AF_INET6: 1175 sin6 = satocsin6(sa); 1176 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1177 /* 1178 * An IP6 address of 0 means listen to or stop 1179 * listening to all of the Ethernet multicast 1180 * address used for IP6. 1181 * (This is used for multicast routers.) 1182 */ 1183 memcpy(addrlo, ether_ip6multicast_min, ETHER_ADDR_LEN); 1184 memcpy(addrhi, ether_ip6multicast_max, ETHER_ADDR_LEN); 1185 } else { 1186 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1187 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1188 } 1189 break; 1190 #endif 1191 1192 default: 1193 return EAFNOSUPPORT; 1194 } 1195 return 0; 1196 } 1197 1198 /* 1199 * Add an Ethernet multicast address or range of addresses to the list for a 1200 * given interface. 1201 */ 1202 int 1203 ether_addmulti(const struct sockaddr *sa, struct ethercom *ec) 1204 { 1205 struct ether_multi *enm; 1206 u_char addrlo[ETHER_ADDR_LEN]; 1207 u_char addrhi[ETHER_ADDR_LEN]; 1208 int s = splnet(), error; 1209 1210 error = ether_multiaddr(sa, addrlo, addrhi); 1211 if (error != 0) { 1212 splx(s); 1213 return error; 1214 } 1215 1216 /* 1217 * Verify that we have valid Ethernet multicast addresses. 1218 */ 1219 if (!ETHER_IS_MULTICAST(addrlo) || !ETHER_IS_MULTICAST(addrhi)) { 1220 splx(s); 1221 return EINVAL; 1222 } 1223 /* 1224 * See if the address range is already in the list. 1225 */ 1226 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1227 if (enm != NULL) { 1228 /* 1229 * Found it; just increment the reference count. 1230 */ 1231 ++enm->enm_refcount; 1232 splx(s); 1233 return 0; 1234 } 1235 /* 1236 * New address or range; malloc a new multicast record 1237 * and link it into the interface's multicast list. 1238 */ 1239 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1240 if (enm == NULL) { 1241 splx(s); 1242 return ENOBUFS; 1243 } 1244 memcpy(enm->enm_addrlo, addrlo, 6); 1245 memcpy(enm->enm_addrhi, addrhi, 6); 1246 enm->enm_refcount = 1; 1247 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1248 ec->ec_multicnt++; 1249 splx(s); 1250 /* 1251 * Return ENETRESET to inform the driver that the list has changed 1252 * and its reception filter should be adjusted accordingly. 1253 */ 1254 return ENETRESET; 1255 } 1256 1257 /* 1258 * Delete a multicast address record. 1259 */ 1260 int 1261 ether_delmulti(const struct sockaddr *sa, struct ethercom *ec) 1262 { 1263 struct ether_multi *enm; 1264 u_char addrlo[ETHER_ADDR_LEN]; 1265 u_char addrhi[ETHER_ADDR_LEN]; 1266 int s = splnet(), error; 1267 1268 error = ether_multiaddr(sa, addrlo, addrhi); 1269 if (error != 0) { 1270 splx(s); 1271 return (error); 1272 } 1273 1274 /* 1275 * Look ur the address in our list. 1276 */ 1277 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1278 if (enm == NULL) { 1279 splx(s); 1280 return (ENXIO); 1281 } 1282 if (--enm->enm_refcount != 0) { 1283 /* 1284 * Still some claims to this record. 1285 */ 1286 splx(s); 1287 return (0); 1288 } 1289 /* 1290 * No remaining claims to this record; unlink and free it. 1291 */ 1292 LIST_REMOVE(enm, enm_list); 1293 free(enm, M_IFMADDR); 1294 ec->ec_multicnt--; 1295 splx(s); 1296 /* 1297 * Return ENETRESET to inform the driver that the list has changed 1298 * and its reception filter should be adjusted accordingly. 1299 */ 1300 return (ENETRESET); 1301 } 1302 1303 void 1304 ether_set_ifflags_cb(struct ethercom *ec, ether_cb_t cb) 1305 { 1306 ec->ec_ifflags_cb = cb; 1307 } 1308 1309 /* 1310 * Common ioctls for Ethernet interfaces. Note, we must be 1311 * called at splnet(). 1312 */ 1313 int 1314 ether_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1315 { 1316 struct ethercom *ec = (void *) ifp; 1317 struct eccapreq *eccr; 1318 struct ifreq *ifr = (struct ifreq *)data; 1319 struct if_laddrreq *iflr = data; 1320 const struct sockaddr_dl *sdl; 1321 static const uint8_t zero[ETHER_ADDR_LEN]; 1322 int error; 1323 1324 switch (cmd) { 1325 case SIOCINITIFADDR: 1326 { 1327 struct ifaddr *ifa = (struct ifaddr *)data; 1328 if (ifa->ifa_addr->sa_family != AF_LINK 1329 && (ifp->if_flags & (IFF_UP|IFF_RUNNING)) != 1330 (IFF_UP|IFF_RUNNING)) { 1331 ifp->if_flags |= IFF_UP; 1332 if ((error = (*ifp->if_init)(ifp)) != 0) 1333 return error; 1334 } 1335 #ifdef INET 1336 if (ifa->ifa_addr->sa_family == AF_INET) 1337 arp_ifinit(ifp, ifa); 1338 #endif /* INET */ 1339 return 0; 1340 } 1341 1342 case SIOCSIFMTU: 1343 { 1344 int maxmtu; 1345 1346 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1347 maxmtu = ETHERMTU_JUMBO; 1348 else 1349 maxmtu = ETHERMTU; 1350 1351 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1352 return EINVAL; 1353 else if ((error = ifioctl_common(ifp, cmd, data)) != ENETRESET) 1354 return error; 1355 else if (ifp->if_flags & IFF_UP) { 1356 /* Make sure the device notices the MTU change. */ 1357 return (*ifp->if_init)(ifp); 1358 } else 1359 return 0; 1360 } 1361 1362 case SIOCSIFFLAGS: 1363 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1364 return error; 1365 switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) { 1366 case IFF_RUNNING: 1367 /* 1368 * If interface is marked down and it is running, 1369 * then stop and disable it. 1370 */ 1371 (*ifp->if_stop)(ifp, 1); 1372 break; 1373 case IFF_UP: 1374 /* 1375 * If interface is marked up and it is stopped, then 1376 * start it. 1377 */ 1378 return (*ifp->if_init)(ifp); 1379 case IFF_UP|IFF_RUNNING: 1380 error = 0; 1381 if (ec->ec_ifflags_cb == NULL || 1382 (error = (*ec->ec_ifflags_cb)(ec)) == ENETRESET) { 1383 /* 1384 * Reset the interface to pick up 1385 * changes in any other flags that 1386 * affect the hardware state. 1387 */ 1388 return (*ifp->if_init)(ifp); 1389 } else 1390 return error; 1391 case 0: 1392 break; 1393 } 1394 return 0; 1395 case SIOCGETHERCAP: 1396 eccr = (struct eccapreq *)data; 1397 eccr->eccr_capabilities = ec->ec_capabilities; 1398 eccr->eccr_capenable = ec->ec_capenable; 1399 return 0; 1400 case SIOCADDMULTI: 1401 return ether_addmulti(ifreq_getaddr(cmd, ifr), ec); 1402 case SIOCDELMULTI: 1403 return ether_delmulti(ifreq_getaddr(cmd, ifr), ec); 1404 case SIOCSIFMEDIA: 1405 case SIOCGIFMEDIA: 1406 if (ec->ec_mii == NULL) 1407 return ENOTTY; 1408 return ifmedia_ioctl(ifp, ifr, &ec->ec_mii->mii_media, cmd); 1409 case SIOCALIFADDR: 1410 sdl = satocsdl(sstocsa(&iflr->addr)); 1411 if (sdl->sdl_family != AF_LINK) 1412 ; 1413 else if (ETHER_IS_MULTICAST(CLLADDR(sdl))) 1414 return EINVAL; 1415 else if (memcmp(zero, CLLADDR(sdl), sizeof(zero)) == 0) 1416 return EINVAL; 1417 /*FALLTHROUGH*/ 1418 default: 1419 return ifioctl_common(ifp, cmd, data); 1420 } 1421 return 0; 1422 } 1423 1424 static int 1425 ether_multicast_sysctl(SYSCTLFN_ARGS) 1426 { 1427 struct ether_multi *enm; 1428 struct ether_multi_sysctl addr; 1429 struct ifnet *ifp; 1430 struct ethercom *ec; 1431 int error; 1432 size_t written; 1433 1434 if (namelen != 1) 1435 return EINVAL; 1436 1437 ifp = if_byindex(name[0]); 1438 if (ifp == NULL) 1439 return ENODEV; 1440 if (ifp->if_type != IFT_ETHER) { 1441 *oldlenp = 0; 1442 return 0; 1443 } 1444 ec = (struct ethercom *)ifp; 1445 1446 if (oldp == NULL) { 1447 *oldlenp = ec->ec_multicnt * sizeof(addr); 1448 return 0; 1449 } 1450 1451 memset(&addr, 0, sizeof(addr)); 1452 error = 0; 1453 written = 0; 1454 1455 LIST_FOREACH(enm, &ec->ec_multiaddrs, enm_list) { 1456 if (written + sizeof(addr) > *oldlenp) 1457 break; 1458 addr.enm_refcount = enm->enm_refcount; 1459 memcpy(addr.enm_addrlo, enm->enm_addrlo, ETHER_ADDR_LEN); 1460 memcpy(addr.enm_addrhi, enm->enm_addrhi, ETHER_ADDR_LEN); 1461 error = sysctl_copyout(l, &addr, oldp, sizeof(addr)); 1462 if (error) 1463 break; 1464 written += sizeof(addr); 1465 oldp = (char *)oldp + sizeof(addr); 1466 } 1467 1468 *oldlenp = written; 1469 return error; 1470 } 1471 1472 SYSCTL_SETUP(sysctl_net_ether_setup, "sysctl net.ether subtree setup") 1473 { 1474 const struct sysctlnode *rnode = NULL; 1475 1476 sysctl_createv(clog, 0, NULL, &rnode, 1477 CTLFLAG_PERMANENT, 1478 CTLTYPE_NODE, "ether", 1479 SYSCTL_DESCR("Ethernet-specific information"), 1480 NULL, 0, NULL, 0, 1481 CTL_NET, CTL_CREATE, CTL_EOL); 1482 1483 sysctl_createv(clog, 0, &rnode, NULL, 1484 CTLFLAG_PERMANENT, 1485 CTLTYPE_NODE, "multicast", 1486 SYSCTL_DESCR("multicast addresses"), 1487 ether_multicast_sysctl, 0, NULL, 0, 1488 CTL_CREATE, CTL_EOL); 1489 } 1490 1491 void 1492 etherinit(void) 1493 { 1494 mutex_init(&bigpktpps_lock, MUTEX_DEFAULT, IPL_NET); 1495 } 1496
Indexes created Tue Sep 30 10:09:55 GMT 2025