if_ethersubr.c revision 1.244
1 /* $NetBSD: if_ethersubr.c,v 1.244 2017/09/26 07:42:06 knakahara Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1982, 1989, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)if_ethersubr.c 8.2 (Berkeley) 4/4/96 61 */ 62 63 #include <sys/cdefs.h> 64 __KERNEL_RCSID(0, "$NetBSD: if_ethersubr.c,v 1.244 2017/09/26 07:42:06 knakahara Exp $"); 65 66 #ifdef _KERNEL_OPT 67 #include "opt_inet.h" 68 #include "opt_atalk.h" 69 #include "opt_mbuftrace.h" 70 #include "opt_mpls.h" 71 #include "opt_gateway.h" 72 #include "opt_pppoe.h" 73 #include "opt_net_mpsafe.h" 74 #endif 75 76 #include "vlan.h" 77 #include "pppoe.h" 78 #include "bridge.h" 79 #include "arp.h" 80 #include "agr.h" 81 82 #include <sys/sysctl.h> 83 #include <sys/mbuf.h> 84 #include <sys/mutex.h> 85 #include <sys/ioctl.h> 86 #include <sys/errno.h> 87 #include <sys/device.h> 88 #include <sys/rnd.h> 89 #include <sys/rndsource.h> 90 #include <sys/cpu.h> 91 #include <sys/kmem.h> 92 93 #include <net/if.h> 94 #include <net/netisr.h> 95 #include <net/route.h> 96 #include <net/if_llc.h> 97 #include <net/if_dl.h> 98 #include <net/if_types.h> 99 #include <net/pktqueue.h> 100 101 #include <net/if_media.h> 102 #include <dev/mii/mii.h> 103 #include <dev/mii/miivar.h> 104 105 #if NARP == 0 106 /* 107 * XXX there should really be a way to issue this warning from within config(8) 108 */ 109 #error You have included NETATALK or a pseudo-device in your configuration that depends on the presence of ethernet interfaces, but have no such interfaces configured. Check if you really need pseudo-device bridge, pppoe, vlan or options NETATALK. 110 #endif 111 112 #include <net/bpf.h> 113 114 #include <net/if_ether.h> 115 #include <net/if_vlanvar.h> 116 117 #if NPPPOE > 0 118 #include <net/if_pppoe.h> 119 #endif 120 121 #if NAGR > 0 122 #include <net/agr/ieee8023_slowprotocols.h> /* XXX */ 123 #include <net/agr/ieee8023ad.h> 124 #include <net/agr/if_agrvar.h> 125 #endif 126 127 #if NBRIDGE > 0 128 #include <net/if_bridgevar.h> 129 #endif 130 131 #include <netinet/in.h> 132 #ifdef INET 133 #include <netinet/in_var.h> 134 #endif 135 #include <netinet/if_inarp.h> 136 137 #ifdef INET6 138 #ifndef INET 139 #include <netinet/in.h> 140 #endif 141 #include <netinet6/in6_var.h> 142 #include <netinet6/nd6.h> 143 #endif 144 145 146 #include "carp.h" 147 #if NCARP > 0 148 #include <netinet/ip_carp.h> 149 #endif 150 151 #ifdef NETATALK 152 #include <netatalk/at.h> 153 #include <netatalk/at_var.h> 154 #include <netatalk/at_extern.h> 155 156 #define llc_snap_org_code llc_un.type_snap.org_code 157 #define llc_snap_ether_type llc_un.type_snap.ether_type 158 159 extern u_char at_org_code[3]; 160 extern u_char aarp_org_code[3]; 161 #endif /* NETATALK */ 162 163 #ifdef MPLS 164 #include <netmpls/mpls.h> 165 #include <netmpls/mpls_var.h> 166 #endif 167 168 static struct timeval bigpktppslim_last; 169 static int bigpktppslim = 2; /* XXX */ 170 static int bigpktpps_count; 171 static kmutex_t bigpktpps_lock __cacheline_aligned; 172 173 174 const uint8_t etherbroadcastaddr[ETHER_ADDR_LEN] = 175 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 176 const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] = 177 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 }; 178 #define senderr(e) { error = (e); goto bad;} 179 180 static int ether_output(struct ifnet *, struct mbuf *, 181 const struct sockaddr *, const struct rtentry *); 182 183 /* 184 * Ethernet output routine. 185 * Encapsulate a packet of type family for the local net. 186 * Assumes that ifp is actually pointer to ethercom structure. 187 */ 188 static int 189 ether_output(struct ifnet * const ifp0, struct mbuf * const m0, 190 const struct sockaddr * const dst, 191 const struct rtentry *rt) 192 { 193 uint16_t etype = 0; 194 int error = 0, hdrcmplt = 0; 195 uint8_t esrc[6], edst[6]; 196 struct mbuf *m = m0; 197 struct mbuf *mcopy = NULL; 198 struct ether_header *eh; 199 struct ifnet *ifp = ifp0; 200 #ifdef INET 201 struct arphdr *ah; 202 #endif /* INET */ 203 #ifdef NETATALK 204 struct at_ifaddr *aa; 205 #endif /* NETATALK */ 206 207 /* 208 * some paths such as carp_output() call ethr_output() with "ifp" 209 * argument as other than ether ifnet. 210 */ 211 KASSERT(ifp->if_output != ether_output 212 || ifp->if_extflags & IFEF_OUTPUT_MPSAFE); 213 214 #ifdef MBUFTRACE 215 m_claimm(m, ifp->if_mowner); 216 #endif 217 218 #if NCARP > 0 219 if (ifp->if_type == IFT_CARP) { 220 struct ifaddr *ifa; 221 int s = pserialize_read_enter(); 222 223 /* loop back if this is going to the carp interface */ 224 if (dst != NULL && ifp0->if_link_state == LINK_STATE_UP && 225 (ifa = ifa_ifwithaddr(dst)) != NULL) { 226 if (ifa->ifa_ifp == ifp0) { 227 pserialize_read_exit(s); 228 return looutput(ifp0, m, dst, rt); 229 } 230 } 231 pserialize_read_exit(s); 232 233 ifp = ifp->if_carpdev; 234 /* ac = (struct arpcom *)ifp; */ 235 236 if ((ifp0->if_flags & (IFF_UP|IFF_RUNNING)) != 237 (IFF_UP|IFF_RUNNING)) 238 senderr(ENETDOWN); 239 } 240 #endif /* NCARP > 0 */ 241 242 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 243 senderr(ENETDOWN); 244 245 switch (dst->sa_family) { 246 247 #ifdef INET 248 case AF_INET: 249 if (m->m_flags & M_BCAST) 250 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 251 else if (m->m_flags & M_MCAST) 252 ETHER_MAP_IP_MULTICAST(&satocsin(dst)->sin_addr, edst); 253 else if ((error = arpresolve(ifp, rt, m, dst, edst, 254 sizeof(edst))) != 0) { 255 return error == EWOULDBLOCK ? 0 : error; 256 } 257 /* If broadcasting on a simplex interface, loopback a copy */ 258 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 259 mcopy = m_copy(m, 0, (int)M_COPYALL); 260 etype = htons(ETHERTYPE_IP); 261 break; 262 263 case AF_ARP: 264 ah = mtod(m, struct arphdr *); 265 if (m->m_flags & M_BCAST) 266 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 267 else { 268 void *tha = ar_tha(ah); 269 270 if (tha == NULL) { 271 /* fake with ARPHDR_IEEE1394 */ 272 m_freem(m); 273 return 0; 274 } 275 memcpy(edst, tha, sizeof(edst)); 276 } 277 278 ah->ar_hrd = htons(ARPHRD_ETHER); 279 280 switch (ntohs(ah->ar_op)) { 281 case ARPOP_REVREQUEST: 282 case ARPOP_REVREPLY: 283 etype = htons(ETHERTYPE_REVARP); 284 break; 285 286 case ARPOP_REQUEST: 287 case ARPOP_REPLY: 288 default: 289 etype = htons(ETHERTYPE_ARP); 290 } 291 292 break; 293 #endif 294 #ifdef INET6 295 case AF_INET6: 296 if (m->m_flags & M_BCAST) 297 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 298 else if (m->m_flags & M_MCAST) { 299 ETHER_MAP_IPV6_MULTICAST(&satocsin6(dst)->sin6_addr, 300 edst); 301 } else { 302 error = nd6_resolve(ifp, rt, m, dst, edst, 303 sizeof(edst)); 304 if (error != 0) 305 return error == EWOULDBLOCK ? 0 : error; 306 } 307 etype = htons(ETHERTYPE_IPV6); 308 break; 309 #endif 310 #ifdef NETATALK 311 case AF_APPLETALK: { 312 struct ifaddr *ifa; 313 int s; 314 315 KERNEL_LOCK(1, NULL); 316 if (!aarpresolve(ifp, m, (const struct sockaddr_at *)dst, edst)) { 317 #ifdef NETATALKDEBUG 318 printf("aarpresolv failed\n"); 319 #endif /* NETATALKDEBUG */ 320 KERNEL_UNLOCK_ONE(NULL); 321 return (0); 322 } 323 /* 324 * ifaddr is the first thing in at_ifaddr 325 */ 326 s = pserialize_read_enter(); 327 ifa = at_ifawithnet((const struct sockaddr_at *)dst, ifp); 328 if (ifa == NULL) { 329 pserialize_read_exit(s); 330 KERNEL_UNLOCK_ONE(NULL); 331 goto bad; 332 } 333 aa = (struct at_ifaddr *)ifa; 334 335 /* 336 * In the phase 2 case, we need to prepend an mbuf for the 337 * llc header. Since we must preserve the value of m, 338 * which is passed to us by value, we m_copy() the first 339 * mbuf, and use it for our llc header. 340 */ 341 if (aa->aa_flags & AFA_PHASE2) { 342 struct llc llc; 343 344 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 345 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 346 llc.llc_control = LLC_UI; 347 memcpy(llc.llc_snap_org_code, at_org_code, 348 sizeof(llc.llc_snap_org_code)); 349 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 350 memcpy(mtod(m, void *), &llc, sizeof(struct llc)); 351 } else { 352 etype = htons(ETHERTYPE_ATALK); 353 } 354 pserialize_read_exit(s); 355 KERNEL_UNLOCK_ONE(NULL); 356 break; 357 } 358 #endif /* NETATALK */ 359 case pseudo_AF_HDRCMPLT: 360 hdrcmplt = 1; 361 memcpy(esrc, 362 ((const struct ether_header *)dst->sa_data)->ether_shost, 363 sizeof(esrc)); 364 /* FALLTHROUGH */ 365 366 case AF_UNSPEC: 367 memcpy(edst, 368 ((const struct ether_header *)dst->sa_data)->ether_dhost, 369 sizeof(edst)); 370 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 371 etype = ((const struct ether_header *)dst->sa_data)->ether_type; 372 break; 373 374 default: 375 printf("%s: can't handle af%d\n", ifp->if_xname, 376 dst->sa_family); 377 senderr(EAFNOSUPPORT); 378 } 379 380 #ifdef MPLS 381 KERNEL_LOCK(1, NULL); 382 { 383 struct m_tag *mtag; 384 mtag = m_tag_find(m, PACKET_TAG_MPLS, NULL); 385 if (mtag != NULL) { 386 /* Having the tag itself indicates it's MPLS */ 387 etype = htons(ETHERTYPE_MPLS); 388 m_tag_delete(m, mtag); 389 } 390 } 391 KERNEL_UNLOCK_ONE(NULL); 392 #endif 393 394 if (mcopy) 395 (void)looutput(ifp, mcopy, dst, rt); 396 397 /* If no ether type is set, this must be a 802.2 formatted packet. 398 */ 399 if (etype == 0) 400 etype = htons(m->m_pkthdr.len); 401 /* 402 * Add local net header. If no space in first mbuf, 403 * allocate another. 404 */ 405 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 406 if (m == 0) 407 senderr(ENOBUFS); 408 eh = mtod(m, struct ether_header *); 409 /* Note: etype is already in network byte order. */ 410 (void)memcpy(&eh->ether_type, &etype, sizeof(eh->ether_type)); 411 memcpy(eh->ether_dhost, edst, sizeof(edst)); 412 if (hdrcmplt) 413 memcpy(eh->ether_shost, esrc, sizeof(eh->ether_shost)); 414 else 415 memcpy(eh->ether_shost, CLLADDR(ifp->if_sadl), 416 sizeof(eh->ether_shost)); 417 418 #if NCARP > 0 419 if (ifp0 != ifp && ifp0->if_type == IFT_CARP) { 420 memcpy(eh->ether_shost, CLLADDR(ifp0->if_sadl), 421 sizeof(eh->ether_shost)); 422 } 423 #endif /* NCARP > 0 */ 424 425 if ((error = pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 426 return (error); 427 if (m == NULL) 428 return (0); 429 430 #if NBRIDGE > 0 431 /* 432 * Bridges require special output handling. 433 */ 434 if (ifp->if_bridge) 435 return (bridge_output(ifp, m, NULL, NULL)); 436 #endif 437 438 #if NCARP > 0 439 if (ifp != ifp0) 440 ifp0->if_obytes += m->m_pkthdr.len + ETHER_HDR_LEN; 441 #endif /* NCARP > 0 */ 442 443 #ifdef ALTQ 444 KERNEL_LOCK(1, NULL); 445 /* 446 * If ALTQ is enabled on the parent interface, do 447 * classification; the queueing discipline might not 448 * require classification, but might require the 449 * address family/header pointer in the pktattr. 450 */ 451 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 452 altq_etherclassify(&ifp->if_snd, m); 453 KERNEL_UNLOCK_ONE(NULL); 454 #endif 455 return ifq_enqueue(ifp, m); 456 457 bad: 458 if (m) 459 m_freem(m); 460 return (error); 461 } 462 463 #ifdef ALTQ 464 /* 465 * This routine is a slight hack to allow a packet to be classified 466 * if the Ethernet headers are present. It will go away when ALTQ's 467 * classification engine understands link headers. 468 */ 469 void 470 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m) 471 { 472 struct ether_header *eh; 473 uint16_t ether_type; 474 int hlen, af, hdrsize; 475 void *hdr; 476 477 hlen = ETHER_HDR_LEN; 478 eh = mtod(m, struct ether_header *); 479 480 ether_type = htons(eh->ether_type); 481 482 if (ether_type < ETHERMTU) { 483 /* LLC/SNAP */ 484 struct llc *llc = (struct llc *)(eh + 1); 485 hlen += 8; 486 487 if (m->m_len < hlen || 488 llc->llc_dsap != LLC_SNAP_LSAP || 489 llc->llc_ssap != LLC_SNAP_LSAP || 490 llc->llc_control != LLC_UI) { 491 /* Not SNAP. */ 492 goto bad; 493 } 494 495 ether_type = htons(llc->llc_un.type_snap.ether_type); 496 } 497 498 switch (ether_type) { 499 case ETHERTYPE_IP: 500 af = AF_INET; 501 hdrsize = 20; /* sizeof(struct ip) */ 502 break; 503 504 case ETHERTYPE_IPV6: 505 af = AF_INET6; 506 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 507 break; 508 509 default: 510 af = AF_UNSPEC; 511 hdrsize = 0; 512 break; 513 } 514 515 while (m->m_len <= hlen) { 516 hlen -= m->m_len; 517 m = m->m_next; 518 } 519 if (m->m_len < (hlen + hdrsize)) { 520 /* 521 * protocol header not in a single mbuf. 522 * We can't cope with this situation right 523 * now (but it shouldn't ever happen, really, anyhow). 524 */ 525 #ifdef DEBUG 526 printf("altq_etherclassify: headers span multiple mbufs: " 527 "%d < %d\n", m->m_len, (hlen + hdrsize)); 528 #endif 529 goto bad; 530 } 531 532 m->m_data += hlen; 533 m->m_len -= hlen; 534 535 hdr = mtod(m, void *); 536 537 if (ALTQ_NEEDS_CLASSIFY(ifq)) 538 m->m_pkthdr.pattr_class = 539 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 540 m->m_pkthdr.pattr_af = af; 541 m->m_pkthdr.pattr_hdr = hdr; 542 543 m->m_data -= hlen; 544 m->m_len += hlen; 545 546 return; 547 548 bad: 549 m->m_pkthdr.pattr_class = NULL; 550 m->m_pkthdr.pattr_hdr = NULL; 551 m->m_pkthdr.pattr_af = AF_UNSPEC; 552 } 553 #endif /* ALTQ */ 554 555 /* 556 * Process a received Ethernet packet; 557 * the packet is in the mbuf chain m with 558 * the ether header. 559 */ 560 void 561 ether_input(struct ifnet *ifp, struct mbuf *m) 562 { 563 struct ethercom *ec = (struct ethercom *) ifp; 564 pktqueue_t *pktq = NULL; 565 struct ifqueue *inq = NULL; 566 uint16_t etype; 567 struct ether_header *eh; 568 size_t ehlen; 569 static int earlypkts; 570 int isr = 0; 571 #if defined (LLC) || defined(NETATALK) 572 struct llc *l; 573 #endif 574 575 KASSERT(!cpu_intr_p()); 576 577 if ((ifp->if_flags & IFF_UP) == 0) { 578 m_freem(m); 579 return; 580 } 581 582 #ifdef MBUFTRACE 583 m_claimm(m, &ec->ec_rx_mowner); 584 #endif 585 eh = mtod(m, struct ether_header *); 586 etype = ntohs(eh->ether_type); 587 ehlen = sizeof(*eh); 588 589 if(__predict_false(earlypkts < 100 || !rnd_initial_entropy)) { 590 rnd_add_data(NULL, eh, ehlen, 0); 591 earlypkts++; 592 } 593 594 /* 595 * Determine if the packet is within its size limits. 596 */ 597 if (etype != ETHERTYPE_MPLS && m->m_pkthdr.len > 598 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 599 mutex_enter(&bigpktpps_lock); 600 if (ppsratecheck(&bigpktppslim_last, &bigpktpps_count, 601 bigpktppslim)) { 602 printf("%s: discarding oversize frame (len=%d)\n", 603 ifp->if_xname, m->m_pkthdr.len); 604 } 605 mutex_exit(&bigpktpps_lock); 606 m_freem(m); 607 return; 608 } 609 610 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 611 /* 612 * If this is not a simplex interface, drop the packet 613 * if it came from us. 614 */ 615 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 616 memcmp(CLLADDR(ifp->if_sadl), eh->ether_shost, 617 ETHER_ADDR_LEN) == 0) { 618 m_freem(m); 619 return; 620 } 621 622 if (memcmp(etherbroadcastaddr, 623 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 624 m->m_flags |= M_BCAST; 625 else 626 m->m_flags |= M_MCAST; 627 ifp->if_imcasts++; 628 } 629 630 /* If the CRC is still on the packet, trim it off. */ 631 if (m->m_flags & M_HASFCS) { 632 m_adj(m, -ETHER_CRC_LEN); 633 m->m_flags &= ~M_HASFCS; 634 } 635 636 ifp->if_ibytes += m->m_pkthdr.len; 637 638 #if NCARP > 0 639 if (__predict_false(ifp->if_carp && ifp->if_type != IFT_CARP)) { 640 /* 641 * clear M_PROMISC, in case the packets comes from a 642 * vlan 643 */ 644 m->m_flags &= ~M_PROMISC; 645 if (carp_input(m, (uint8_t *)&eh->ether_shost, 646 (uint8_t *)&eh->ether_dhost, eh->ether_type) == 0) 647 return; 648 } 649 #endif /* NCARP > 0 */ 650 if ((m->m_flags & (M_BCAST|M_MCAST|M_PROMISC)) == 0 && 651 (ifp->if_flags & IFF_PROMISC) != 0 && 652 memcmp(CLLADDR(ifp->if_sadl), eh->ether_dhost, 653 ETHER_ADDR_LEN) != 0) { 654 m->m_flags |= M_PROMISC; 655 } 656 657 if ((m->m_flags & M_PROMISC) == 0) { 658 if (pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 659 return; 660 if (m == NULL) 661 return; 662 663 eh = mtod(m, struct ether_header *); 664 etype = ntohs(eh->ether_type); 665 ehlen = sizeof(*eh); 666 } 667 668 #if NAGR > 0 669 if (ifp->if_agrprivate && 670 __predict_true(etype != ETHERTYPE_SLOWPROTOCOLS)) { 671 m->m_flags &= ~M_PROMISC; 672 agr_input(ifp, m); 673 return; 674 } 675 #endif /* NAGR > 0 */ 676 677 /* 678 * If VLANs are configured on the interface, check to 679 * see if the device performed the decapsulation and 680 * provided us with the tag. 681 */ 682 if (ec->ec_nvlans && vlan_has_tag(m)) { 683 #if NVLAN > 0 684 /* 685 * vlan_input() will either recursively call ether_input() 686 * or drop the packet. 687 */ 688 vlan_input(ifp, m); 689 #else 690 m_freem(m); 691 #endif 692 return; 693 } 694 695 /* 696 * Handle protocols that expect to have the Ethernet header 697 * (and possibly FCS) intact. 698 */ 699 switch (etype) { 700 case ETHERTYPE_VLAN: { 701 struct ether_vlan_header *evl = (void *)eh; 702 /* 703 * If there is a tag of 0, then the VLAN header was probably 704 * just being used to store the priority. Extract the ether 705 * type, and if IP or IPV6, let them deal with it. 706 */ 707 if (m->m_len <= sizeof(*evl) 708 && EVL_VLANOFTAG(evl->evl_tag) == 0) { 709 etype = ntohs(evl->evl_proto); 710 ehlen = sizeof(*evl); 711 if ((m->m_flags & M_PROMISC) == 0 712 && (etype == ETHERTYPE_IP 713 || etype == ETHERTYPE_IPV6)) 714 break; 715 } 716 #if NVLAN > 0 717 /* 718 * vlan_input() will either recursively call ether_input() 719 * or drop the packet. 720 */ 721 if (((struct ethercom *)ifp)->ec_nvlans != 0) 722 vlan_input(ifp, m); 723 else 724 #endif /* NVLAN > 0 */ 725 m_freem(m); 726 return; 727 } 728 #if NPPPOE > 0 729 case ETHERTYPE_PPPOEDISC: 730 pppoedisc_input(ifp, m); 731 return; 732 case ETHERTYPE_PPPOE: 733 pppoe_input(ifp, m); 734 return; 735 #endif /* NPPPOE > 0 */ 736 case ETHERTYPE_SLOWPROTOCOLS: { 737 uint8_t subtype; 738 739 #if defined(DIAGNOSTIC) 740 if (m->m_pkthdr.len < sizeof(*eh) + sizeof(subtype)) { 741 panic("ether_input: too short slow protocol packet"); 742 } 743 #endif 744 m_copydata(m, sizeof(*eh), sizeof(subtype), &subtype); 745 switch (subtype) { 746 #if NAGR > 0 747 case SLOWPROTOCOLS_SUBTYPE_LACP: 748 if (ifp->if_agrprivate) { 749 ieee8023ad_lacp_input(ifp, m); 750 return; 751 } 752 break; 753 754 case SLOWPROTOCOLS_SUBTYPE_MARKER: 755 if (ifp->if_agrprivate) { 756 ieee8023ad_marker_input(ifp, m); 757 return; 758 } 759 break; 760 #endif /* NAGR > 0 */ 761 default: 762 if (subtype == 0 || subtype > 10) { 763 /* illegal value */ 764 m_freem(m); 765 return; 766 } 767 /* unknown subtype */ 768 break; 769 } 770 /* FALLTHROUGH */ 771 } 772 default: 773 if (m->m_flags & M_PROMISC) { 774 m_freem(m); 775 return; 776 } 777 } 778 779 /* If the CRC is still on the packet, trim it off. */ 780 if (m->m_flags & M_HASFCS) { 781 m_adj(m, -ETHER_CRC_LEN); 782 m->m_flags &= ~M_HASFCS; 783 } 784 785 if (etype > ETHERMTU + sizeof (struct ether_header)) { 786 /* Strip off the Ethernet header. */ 787 m_adj(m, ehlen); 788 789 switch (etype) { 790 #ifdef INET 791 case ETHERTYPE_IP: 792 #ifdef GATEWAY 793 if (ipflow_fastforward(m)) 794 return; 795 #endif 796 pktq = ip_pktq; 797 break; 798 799 case ETHERTYPE_ARP: 800 isr = NETISR_ARP; 801 inq = &arpintrq; 802 break; 803 804 case ETHERTYPE_REVARP: 805 revarpinput(m); /* XXX queue? */ 806 return; 807 #endif 808 #ifdef INET6 809 case ETHERTYPE_IPV6: 810 if (__predict_false(!in6_present)) { 811 m_freem(m); 812 return; 813 } 814 #ifdef GATEWAY 815 if (ip6flow_fastforward(&m)) 816 return; 817 #endif 818 pktq = ip6_pktq; 819 break; 820 #endif 821 #ifdef NETATALK 822 case ETHERTYPE_ATALK: 823 isr = NETISR_ATALK; 824 inq = &atintrq1; 825 break; 826 case ETHERTYPE_AARP: 827 /* probably this should be done with a NETISR as well */ 828 aarpinput(ifp, m); /* XXX */ 829 return; 830 #endif /* NETATALK */ 831 #ifdef MPLS 832 case ETHERTYPE_MPLS: 833 isr = NETISR_MPLS; 834 inq = &mplsintrq; 835 break; 836 #endif 837 default: 838 m_freem(m); 839 return; 840 } 841 } else { 842 #if defined (LLC) || defined (NETATALK) 843 l = (struct llc *)(eh+1); 844 switch (l->llc_dsap) { 845 #ifdef NETATALK 846 case LLC_SNAP_LSAP: 847 switch (l->llc_control) { 848 case LLC_UI: 849 if (l->llc_ssap != LLC_SNAP_LSAP) { 850 goto dropanyway; 851 } 852 853 if (memcmp(&(l->llc_snap_org_code)[0], 854 at_org_code, sizeof(at_org_code)) == 0 && 855 ntohs(l->llc_snap_ether_type) == 856 ETHERTYPE_ATALK) { 857 inq = &atintrq2; 858 m_adj(m, sizeof(struct ether_header) 859 + sizeof(struct llc)); 860 isr = NETISR_ATALK; 861 break; 862 } 863 864 if (memcmp(&(l->llc_snap_org_code)[0], 865 aarp_org_code, 866 sizeof(aarp_org_code)) == 0 && 867 ntohs(l->llc_snap_ether_type) == 868 ETHERTYPE_AARP) { 869 m_adj( m, sizeof(struct ether_header) 870 + sizeof(struct llc)); 871 aarpinput(ifp, m); /* XXX */ 872 return; 873 } 874 875 default: 876 goto dropanyway; 877 } 878 break; 879 dropanyway: 880 #endif 881 default: 882 m_freem(m); 883 return; 884 } 885 #else /* ISO || LLC || NETATALK*/ 886 m_freem(m); 887 return; 888 #endif /* ISO || LLC || NETATALK*/ 889 } 890 891 if (__predict_true(pktq)) { 892 #ifdef NET_MPSAFE 893 const u_int h = curcpu()->ci_index; 894 #else 895 const uint32_t h = pktq_rps_hash(m); 896 #endif 897 if (__predict_false(!pktq_enqueue(pktq, m, h))) { 898 m_freem(m); 899 } 900 return; 901 } 902 903 if (__predict_false(!inq)) { 904 /* Should not happen. */ 905 m_freem(m); 906 return; 907 } 908 909 IFQ_LOCK(inq); 910 if (IF_QFULL(inq)) { 911 IF_DROP(inq); 912 IFQ_UNLOCK(inq); 913 m_freem(m); 914 } else { 915 IF_ENQUEUE(inq, m); 916 IFQ_UNLOCK(inq); 917 schednetisr(isr); 918 } 919 } 920 921 /* 922 * Convert Ethernet address to printable (loggable) representation. 923 */ 924 char * 925 ether_sprintf(const u_char *ap) 926 { 927 static char etherbuf[3 * ETHER_ADDR_LEN]; 928 return ether_snprintf(etherbuf, sizeof(etherbuf), ap); 929 } 930 931 char * 932 ether_snprintf(char *buf, size_t len, const u_char *ap) 933 { 934 char *cp = buf; 935 size_t i; 936 937 for (i = 0; i < len / 3; i++) { 938 *cp++ = hexdigits[*ap >> 4]; 939 *cp++ = hexdigits[*ap++ & 0xf]; 940 *cp++ = ':'; 941 } 942 *--cp = '\0'; 943 return buf; 944 } 945 946 /* 947 * Perform common duties while attaching to interface list 948 */ 949 void 950 ether_ifattach(struct ifnet *ifp, const uint8_t *lla) 951 { 952 struct ethercom *ec = (struct ethercom *)ifp; 953 954 ifp->if_extflags |= IFEF_OUTPUT_MPSAFE; 955 ifp->if_type = IFT_ETHER; 956 ifp->if_hdrlen = ETHER_HDR_LEN; 957 ifp->if_dlt = DLT_EN10MB; 958 ifp->if_mtu = ETHERMTU; 959 ifp->if_output = ether_output; 960 ifp->_if_input = ether_input; 961 if (ifp->if_baudrate == 0) 962 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 963 964 if (lla != NULL) 965 if_set_sadl(ifp, lla, ETHER_ADDR_LEN, !ETHER_IS_LOCAL(lla)); 966 967 LIST_INIT(&ec->ec_multiaddrs); 968 ec->ec_lock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_NET); 969 ifp->if_broadcastaddr = etherbroadcastaddr; 970 bpf_attach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 971 #ifdef MBUFTRACE 972 strlcpy(ec->ec_tx_mowner.mo_name, ifp->if_xname, 973 sizeof(ec->ec_tx_mowner.mo_name)); 974 strlcpy(ec->ec_tx_mowner.mo_descr, "tx", 975 sizeof(ec->ec_tx_mowner.mo_descr)); 976 strlcpy(ec->ec_rx_mowner.mo_name, ifp->if_xname, 977 sizeof(ec->ec_rx_mowner.mo_name)); 978 strlcpy(ec->ec_rx_mowner.mo_descr, "rx", 979 sizeof(ec->ec_rx_mowner.mo_descr)); 980 MOWNER_ATTACH(&ec->ec_tx_mowner); 981 MOWNER_ATTACH(&ec->ec_rx_mowner); 982 ifp->if_mowner = &ec->ec_tx_mowner; 983 #endif 984 } 985 986 void 987 ether_ifdetach(struct ifnet *ifp) 988 { 989 struct ethercom *ec = (void *) ifp; 990 struct ether_multi *enm; 991 992 /* 993 * Prevent further calls to ioctl (for example turning off 994 * promiscuous mode from the bridge code), which eventually can 995 * call if_init() which can cause panics because the interface 996 * is in the process of being detached. Return device not configured 997 * instead. 998 */ 999 ifp->if_ioctl = (int (*)(struct ifnet *, u_long, void *))enxio; 1000 1001 #if NBRIDGE > 0 1002 if (ifp->if_bridge) 1003 bridge_ifdetach(ifp); 1004 #endif 1005 1006 bpf_detach(ifp); 1007 1008 #if NVLAN > 0 1009 if (ec->ec_nvlans) 1010 vlan_ifdetach(ifp); 1011 #endif 1012 1013 mutex_enter(ec->ec_lock); 1014 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1015 LIST_REMOVE(enm, enm_list); 1016 kmem_intr_free(enm, sizeof(*enm)); 1017 ec->ec_multicnt--; 1018 } 1019 mutex_exit(ec->ec_lock); 1020 1021 mutex_destroy(ec->ec_lock); 1022 1023 ifp->if_mowner = NULL; 1024 MOWNER_DETACH(&ec->ec_rx_mowner); 1025 MOWNER_DETACH(&ec->ec_tx_mowner); 1026 } 1027 1028 #if 0 1029 /* 1030 * This is for reference. We have a table-driven version 1031 * of the little-endian crc32 generator, which is faster 1032 * than the double-loop. 1033 */ 1034 uint32_t 1035 ether_crc32_le(const uint8_t *buf, size_t len) 1036 { 1037 uint32_t c, crc, carry; 1038 size_t i, j; 1039 1040 crc = 0xffffffffU; /* initial value */ 1041 1042 for (i = 0; i < len; i++) { 1043 c = buf[i]; 1044 for (j = 0; j < 8; j++) { 1045 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1046 crc >>= 1; 1047 c >>= 1; 1048 if (carry) 1049 crc = (crc ^ ETHER_CRC_POLY_LE); 1050 } 1051 } 1052 1053 return (crc); 1054 } 1055 #else 1056 uint32_t 1057 ether_crc32_le(const uint8_t *buf, size_t len) 1058 { 1059 static const uint32_t crctab[] = { 1060 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1061 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1062 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1063 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1064 }; 1065 uint32_t crc; 1066 size_t i; 1067 1068 crc = 0xffffffffU; /* initial value */ 1069 1070 for (i = 0; i < len; i++) { 1071 crc ^= buf[i]; 1072 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1073 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1074 } 1075 1076 return (crc); 1077 } 1078 #endif 1079 1080 uint32_t 1081 ether_crc32_be(const uint8_t *buf, size_t len) 1082 { 1083 uint32_t c, crc, carry; 1084 size_t i, j; 1085 1086 crc = 0xffffffffU; /* initial value */ 1087 1088 for (i = 0; i < len; i++) { 1089 c = buf[i]; 1090 for (j = 0; j < 8; j++) { 1091 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1092 crc <<= 1; 1093 c >>= 1; 1094 if (carry) 1095 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1096 } 1097 } 1098 1099 return (crc); 1100 } 1101 1102 #ifdef INET 1103 const uint8_t ether_ipmulticast_min[ETHER_ADDR_LEN] = 1104 { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1105 const uint8_t ether_ipmulticast_max[ETHER_ADDR_LEN] = 1106 { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1107 #endif 1108 #ifdef INET6 1109 const uint8_t ether_ip6multicast_min[ETHER_ADDR_LEN] = 1110 { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1111 const uint8_t ether_ip6multicast_max[ETHER_ADDR_LEN] = 1112 { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1113 #endif 1114 1115 /* 1116 * ether_aton implementation, not using a static buffer. 1117 */ 1118 int 1119 ether_aton_r(u_char *dest, size_t len, const char *str) 1120 { 1121 const u_char *cp = (const void *)str; 1122 u_char *ep; 1123 1124 #define atox(c) (((c) <= '9') ? ((c) - '0') : ((toupper(c) - 'A') + 10)) 1125 1126 if (len < ETHER_ADDR_LEN) 1127 return ENOSPC; 1128 1129 ep = dest + ETHER_ADDR_LEN; 1130 1131 while (*cp) { 1132 if (!isxdigit(*cp)) 1133 return EINVAL; 1134 *dest = atox(*cp); 1135 cp++; 1136 if (isxdigit(*cp)) { 1137 *dest = (*dest << 4) | atox(*cp); 1138 dest++; 1139 cp++; 1140 } else 1141 dest++; 1142 if (dest == ep) 1143 return *cp == '\0' ? 0 : ENAMETOOLONG; 1144 switch (*cp) { 1145 case ':': 1146 case '-': 1147 case '.': 1148 cp++; 1149 break; 1150 } 1151 } 1152 return ENOBUFS; 1153 } 1154 1155 /* 1156 * Convert a sockaddr into an Ethernet address or range of Ethernet 1157 * addresses. 1158 */ 1159 int 1160 ether_multiaddr(const struct sockaddr *sa, uint8_t addrlo[ETHER_ADDR_LEN], 1161 uint8_t addrhi[ETHER_ADDR_LEN]) 1162 { 1163 #ifdef INET 1164 const struct sockaddr_in *sin; 1165 #endif /* INET */ 1166 #ifdef INET6 1167 const struct sockaddr_in6 *sin6; 1168 #endif /* INET6 */ 1169 1170 switch (sa->sa_family) { 1171 1172 case AF_UNSPEC: 1173 memcpy(addrlo, sa->sa_data, ETHER_ADDR_LEN); 1174 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1175 break; 1176 1177 #ifdef INET 1178 case AF_INET: 1179 sin = satocsin(sa); 1180 if (sin->sin_addr.s_addr == INADDR_ANY) { 1181 /* 1182 * An IP address of INADDR_ANY means listen to 1183 * or stop listening to all of the Ethernet 1184 * multicast addresses used for IP. 1185 * (This is for the sake of IP multicast routers.) 1186 */ 1187 memcpy(addrlo, ether_ipmulticast_min, ETHER_ADDR_LEN); 1188 memcpy(addrhi, ether_ipmulticast_max, ETHER_ADDR_LEN); 1189 } 1190 else { 1191 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1192 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1193 } 1194 break; 1195 #endif 1196 #ifdef INET6 1197 case AF_INET6: 1198 sin6 = satocsin6(sa); 1199 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1200 /* 1201 * An IP6 address of 0 means listen to or stop 1202 * listening to all of the Ethernet multicast 1203 * address used for IP6. 1204 * (This is used for multicast routers.) 1205 */ 1206 memcpy(addrlo, ether_ip6multicast_min, ETHER_ADDR_LEN); 1207 memcpy(addrhi, ether_ip6multicast_max, ETHER_ADDR_LEN); 1208 } else { 1209 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1210 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1211 } 1212 break; 1213 #endif 1214 1215 default: 1216 return EAFNOSUPPORT; 1217 } 1218 return 0; 1219 } 1220 1221 /* 1222 * Add an Ethernet multicast address or range of addresses to the list for a 1223 * given interface. 1224 */ 1225 int 1226 ether_addmulti(const struct sockaddr *sa, struct ethercom *ec) 1227 { 1228 struct ether_multi *enm, *_enm; 1229 u_char addrlo[ETHER_ADDR_LEN]; 1230 u_char addrhi[ETHER_ADDR_LEN]; 1231 int error = 0; 1232 1233 /* Allocate out of lock */ 1234 /* XXX still can be called in softint */ 1235 enm = kmem_intr_alloc(sizeof(*enm), KM_SLEEP); 1236 if (enm == NULL) 1237 return ENOBUFS; 1238 1239 mutex_enter(ec->ec_lock); 1240 error = ether_multiaddr(sa, addrlo, addrhi); 1241 if (error != 0) 1242 goto out; 1243 1244 /* 1245 * Verify that we have valid Ethernet multicast addresses. 1246 */ 1247 if (!ETHER_IS_MULTICAST(addrlo) || !ETHER_IS_MULTICAST(addrhi)) { 1248 error = EINVAL; 1249 goto out; 1250 } 1251 /* 1252 * See if the address range is already in the list. 1253 */ 1254 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, _enm); 1255 if (_enm != NULL) { 1256 /* 1257 * Found it; just increment the reference count. 1258 */ 1259 ++_enm->enm_refcount; 1260 error = 0; 1261 goto out; 1262 } 1263 /* 1264 * Link a new multicast record into the interface's multicast list. 1265 */ 1266 memcpy(enm->enm_addrlo, addrlo, 6); 1267 memcpy(enm->enm_addrhi, addrhi, 6); 1268 enm->enm_refcount = 1; 1269 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1270 ec->ec_multicnt++; 1271 /* 1272 * Return ENETRESET to inform the driver that the list has changed 1273 * and its reception filter should be adjusted accordingly. 1274 */ 1275 error = ENETRESET; 1276 enm = NULL; 1277 out: 1278 mutex_exit(ec->ec_lock); 1279 if (enm != NULL) 1280 kmem_intr_free(enm, sizeof(*enm)); 1281 return error; 1282 } 1283 1284 /* 1285 * Delete a multicast address record. 1286 */ 1287 int 1288 ether_delmulti(const struct sockaddr *sa, struct ethercom *ec) 1289 { 1290 struct ether_multi *enm; 1291 u_char addrlo[ETHER_ADDR_LEN]; 1292 u_char addrhi[ETHER_ADDR_LEN]; 1293 int error; 1294 1295 mutex_enter(ec->ec_lock); 1296 error = ether_multiaddr(sa, addrlo, addrhi); 1297 if (error != 0) 1298 goto error; 1299 1300 /* 1301 * Look ur the address in our list. 1302 */ 1303 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1304 if (enm == NULL) { 1305 error = ENXIO; 1306 goto error; 1307 } 1308 if (--enm->enm_refcount != 0) { 1309 /* 1310 * Still some claims to this record. 1311 */ 1312 error = 0; 1313 goto error; 1314 } 1315 /* 1316 * No remaining claims to this record; unlink and free it. 1317 */ 1318 LIST_REMOVE(enm, enm_list); 1319 ec->ec_multicnt--; 1320 mutex_exit(ec->ec_lock); 1321 1322 kmem_intr_free(enm, sizeof(*enm)); 1323 /* 1324 * Return ENETRESET to inform the driver that the list has changed 1325 * and its reception filter should be adjusted accordingly. 1326 */ 1327 return ENETRESET; 1328 error: 1329 mutex_exit(ec->ec_lock); 1330 return error; 1331 } 1332 1333 void 1334 ether_set_ifflags_cb(struct ethercom *ec, ether_cb_t cb) 1335 { 1336 ec->ec_ifflags_cb = cb; 1337 } 1338 1339 /* 1340 * Common ioctls for Ethernet interfaces. Note, we must be 1341 * called at splnet(). 1342 */ 1343 int 1344 ether_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1345 { 1346 struct ethercom *ec = (void *) ifp; 1347 struct eccapreq *eccr; 1348 struct ifreq *ifr = (struct ifreq *)data; 1349 struct if_laddrreq *iflr = data; 1350 const struct sockaddr_dl *sdl; 1351 static const uint8_t zero[ETHER_ADDR_LEN]; 1352 int error; 1353 1354 switch (cmd) { 1355 case SIOCINITIFADDR: 1356 { 1357 struct ifaddr *ifa = (struct ifaddr *)data; 1358 if (ifa->ifa_addr->sa_family != AF_LINK 1359 && (ifp->if_flags & (IFF_UP|IFF_RUNNING)) != 1360 (IFF_UP|IFF_RUNNING)) { 1361 ifp->if_flags |= IFF_UP; 1362 if ((error = (*ifp->if_init)(ifp)) != 0) 1363 return error; 1364 } 1365 #ifdef INET 1366 if (ifa->ifa_addr->sa_family == AF_INET) 1367 arp_ifinit(ifp, ifa); 1368 #endif /* INET */ 1369 return 0; 1370 } 1371 1372 case SIOCSIFMTU: 1373 { 1374 int maxmtu; 1375 1376 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1377 maxmtu = ETHERMTU_JUMBO; 1378 else 1379 maxmtu = ETHERMTU; 1380 1381 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1382 return EINVAL; 1383 else if ((error = ifioctl_common(ifp, cmd, data)) != ENETRESET) 1384 return error; 1385 else if (ifp->if_flags & IFF_UP) { 1386 /* Make sure the device notices the MTU change. */ 1387 return (*ifp->if_init)(ifp); 1388 } else 1389 return 0; 1390 } 1391 1392 case SIOCSIFFLAGS: 1393 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1394 return error; 1395 switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) { 1396 case IFF_RUNNING: 1397 /* 1398 * If interface is marked down and it is running, 1399 * then stop and disable it. 1400 */ 1401 (*ifp->if_stop)(ifp, 1); 1402 break; 1403 case IFF_UP: 1404 /* 1405 * If interface is marked up and it is stopped, then 1406 * start it. 1407 */ 1408 return (*ifp->if_init)(ifp); 1409 case IFF_UP|IFF_RUNNING: 1410 error = 0; 1411 if (ec->ec_ifflags_cb == NULL || 1412 (error = (*ec->ec_ifflags_cb)(ec)) == ENETRESET) { 1413 /* 1414 * Reset the interface to pick up 1415 * changes in any other flags that 1416 * affect the hardware state. 1417 */ 1418 return (*ifp->if_init)(ifp); 1419 } else 1420 return error; 1421 case 0: 1422 break; 1423 } 1424 return 0; 1425 case SIOCGETHERCAP: 1426 eccr = (struct eccapreq *)data; 1427 eccr->eccr_capabilities = ec->ec_capabilities; 1428 eccr->eccr_capenable = ec->ec_capenable; 1429 return 0; 1430 case SIOCADDMULTI: 1431 return ether_addmulti(ifreq_getaddr(cmd, ifr), ec); 1432 case SIOCDELMULTI: 1433 return ether_delmulti(ifreq_getaddr(cmd, ifr), ec); 1434 case SIOCSIFMEDIA: 1435 case SIOCGIFMEDIA: 1436 if (ec->ec_mii == NULL) 1437 return ENOTTY; 1438 return ifmedia_ioctl(ifp, ifr, &ec->ec_mii->mii_media, cmd); 1439 case SIOCALIFADDR: 1440 sdl = satocsdl(sstocsa(&iflr->addr)); 1441 if (sdl->sdl_family != AF_LINK) 1442 ; 1443 else if (ETHER_IS_MULTICAST(CLLADDR(sdl))) 1444 return EINVAL; 1445 else if (memcmp(zero, CLLADDR(sdl), sizeof(zero)) == 0) 1446 return EINVAL; 1447 /*FALLTHROUGH*/ 1448 default: 1449 return ifioctl_common(ifp, cmd, data); 1450 } 1451 return 0; 1452 } 1453 1454 /* 1455 * Enable/disable passing VLAN packets if the parent interface supports it. 1456 * Return: 1457 * 0: Ok 1458 * -1: Parent interface does not support vlans 1459 * >0: Error 1460 */ 1461 int 1462 ether_enable_vlan_mtu(struct ifnet *ifp) 1463 { 1464 int error; 1465 struct ethercom *ec = (void *)ifp; 1466 1467 /* Parent does not support VLAN's */ 1468 if ((ec->ec_capabilities & ETHERCAP_VLAN_MTU) == 0) 1469 return -1; 1470 1471 /* 1472 * Parent supports the VLAN_MTU capability, 1473 * i.e. can Tx/Rx larger than ETHER_MAX_LEN frames; 1474 * enable it. 1475 */ 1476 ec->ec_capenable |= ETHERCAP_VLAN_MTU; 1477 1478 /* Interface is down, defer for later */ 1479 if ((ifp->if_flags & IFF_UP) == 0) 1480 return 0; 1481 1482 if ((error = if_flags_set(ifp, ifp->if_flags)) == 0) 1483 return 0; 1484 1485 ec->ec_capenable &= ~ETHERCAP_VLAN_MTU; 1486 return error; 1487 } 1488 1489 int 1490 ether_disable_vlan_mtu(struct ifnet *ifp) 1491 { 1492 int error; 1493 struct ethercom *ec = (void *)ifp; 1494 1495 /* We still have VLAN's, defer for later */ 1496 if (ec->ec_nvlans != 0) 1497 return 0; 1498 1499 /* Parent does not support VLAB's, nothing to do. */ 1500 if ((ec->ec_capenable & ETHERCAP_VLAN_MTU) == 0) 1501 return -1; 1502 1503 /* 1504 * Disable Tx/Rx of VLAN-sized frames. 1505 */ 1506 ec->ec_capenable &= ~ETHERCAP_VLAN_MTU; 1507 1508 /* Interface is down, defer for later */ 1509 if ((ifp->if_flags & IFF_UP) == 0) 1510 return 0; 1511 1512 if ((error = if_flags_set(ifp, ifp->if_flags)) == 0) 1513 return 0; 1514 1515 ec->ec_capenable |= ETHERCAP_VLAN_MTU; 1516 return error; 1517 } 1518 1519 static int 1520 ether_multicast_sysctl(SYSCTLFN_ARGS) 1521 { 1522 struct ether_multi *enm; 1523 struct ifnet *ifp; 1524 struct ethercom *ec; 1525 int error = 0; 1526 size_t written; 1527 struct psref psref; 1528 int bound; 1529 unsigned int multicnt; 1530 struct ether_multi_sysctl *addrs; 1531 int i; 1532 1533 if (namelen != 1) 1534 return EINVAL; 1535 1536 bound = curlwp_bind(); 1537 ifp = if_get_byindex(name[0], &psref); 1538 if (ifp == NULL) { 1539 error = ENODEV; 1540 goto out; 1541 } 1542 if (ifp->if_type != IFT_ETHER) { 1543 if_put(ifp, &psref); 1544 *oldlenp = 0; 1545 goto out; 1546 } 1547 ec = (struct ethercom *)ifp; 1548 1549 if (oldp == NULL) { 1550 if_put(ifp, &psref); 1551 *oldlenp = ec->ec_multicnt * sizeof(*addrs); 1552 goto out; 1553 } 1554 1555 /* 1556 * ec->ec_lock is a spin mutex so we cannot call sysctl_copyout, which 1557 * is sleepable, with holding it. Copy data to a local buffer first 1558 * with holding it and then call sysctl_copyout without holding it. 1559 */ 1560 retry: 1561 multicnt = ec->ec_multicnt; 1562 addrs = kmem_alloc(sizeof(*addrs) * multicnt, KM_SLEEP); 1563 1564 mutex_enter(ec->ec_lock); 1565 if (multicnt < ec->ec_multicnt) { 1566 /* The number of multicast addresses have increased */ 1567 mutex_exit(ec->ec_lock); 1568 kmem_free(addrs, sizeof(*addrs) * multicnt); 1569 goto retry; 1570 } 1571 1572 i = 0; 1573 LIST_FOREACH(enm, &ec->ec_multiaddrs, enm_list) { 1574 struct ether_multi_sysctl *addr = &addrs[i]; 1575 addr->enm_refcount = enm->enm_refcount; 1576 memcpy(addr->enm_addrlo, enm->enm_addrlo, ETHER_ADDR_LEN); 1577 memcpy(addr->enm_addrhi, enm->enm_addrhi, ETHER_ADDR_LEN); 1578 i++; 1579 } 1580 mutex_exit(ec->ec_lock); 1581 1582 error = 0; 1583 written = 0; 1584 for (i = 0; i < multicnt; i++) { 1585 struct ether_multi_sysctl *addr = &addrs[i]; 1586 1587 if (written + sizeof(*addr) > *oldlenp) 1588 break; 1589 error = sysctl_copyout(l, addr, oldp, sizeof(*addr)); 1590 if (error) 1591 break; 1592 written += sizeof(*addr); 1593 oldp = (char *)oldp + sizeof(*addr); 1594 } 1595 kmem_free(addrs, sizeof(*addrs) * multicnt); 1596 1597 if_put(ifp, &psref); 1598 1599 *oldlenp = written; 1600 out: 1601 curlwp_bindx(bound); 1602 return error; 1603 } 1604 1605 static void 1606 ether_sysctl_setup(struct sysctllog **clog) 1607 { 1608 const struct sysctlnode *rnode = NULL; 1609 1610 sysctl_createv(clog, 0, NULL, &rnode, 1611 CTLFLAG_PERMANENT, 1612 CTLTYPE_NODE, "ether", 1613 SYSCTL_DESCR("Ethernet-specific information"), 1614 NULL, 0, NULL, 0, 1615 CTL_NET, CTL_CREATE, CTL_EOL); 1616 1617 sysctl_createv(clog, 0, &rnode, NULL, 1618 CTLFLAG_PERMANENT, 1619 CTLTYPE_NODE, "multicast", 1620 SYSCTL_DESCR("multicast addresses"), 1621 ether_multicast_sysctl, 0, NULL, 0, 1622 CTL_CREATE, CTL_EOL); 1623 } 1624 1625 void 1626 etherinit(void) 1627 { 1628 1629 mutex_init(&bigpktpps_lock, MUTEX_DEFAULT, IPL_NET); 1630 ether_sysctl_setup(NULL); 1631 } 1632
Indexes created Mon Sep 22 05:09:51 GMT 2025