1 /* $NetBSD: if_ethersubr.c,v 1.207 2015/04/13 22:46:57 riastradh 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 1.207 2015/04/13 22:46:57 riastradh Exp $"); 65 66 #include "opt_inet.h" 67 #include "opt_atalk.h" 68 #include "opt_ipx.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 #include "vlan.h" 75 #include "pppoe.h" 76 #include "bridge.h" 77 #include "arp.h" 78 #include "agr.h" 79 80 #include <sys/param.h> 81 #include <sys/systm.h> 82 #include <sys/sysctl.h> 83 #include <sys/kernel.h> 84 #include <sys/callout.h> 85 #include <sys/malloc.h> 86 #include <sys/mbuf.h> 87 #include <sys/protosw.h> 88 #include <sys/socket.h> 89 #include <sys/ioctl.h> 90 #include <sys/errno.h> 91 #include <sys/syslog.h> 92 #include <sys/kauth.h> 93 #include <sys/cpu.h> 94 #include <sys/intr.h> 95 #include <sys/device.h> 96 #include <sys/rnd.h> 97 #include <sys/rndsource.h> 98 99 #include <net/if.h> 100 #include <net/netisr.h> 101 #include <net/route.h> 102 #include <net/if_llc.h> 103 #include <net/if_dl.h> 104 #include <net/if_types.h> 105 106 #include <net/if_media.h> 107 #include <dev/mii/mii.h> 108 #include <dev/mii/miivar.h> 109 110 #if NARP == 0 111 /* 112 * XXX there should really be a way to issue this warning from within config(8) 113 */ 114 #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. 115 #endif 116 117 #include <net/bpf.h> 118 119 #include <net/if_ether.h> 120 #include <net/if_vlanvar.h> 121 122 #if NPPPOE > 0 123 #include <net/if_pppoe.h> 124 #endif 125 126 #if NAGR > 0 127 #include <net/agr/ieee8023_slowprotocols.h> /* XXX */ 128 #include <net/agr/ieee8023ad.h> 129 #include <net/agr/if_agrvar.h> 130 #endif 131 132 #if NBRIDGE > 0 133 #include <net/if_bridgevar.h> 134 #endif 135 136 #include <netinet/in.h> 137 #ifdef INET 138 #include <netinet/in_var.h> 139 #endif 140 #include <netinet/if_inarp.h> 141 142 #ifdef INET6 143 #ifndef INET 144 #include <netinet/in.h> 145 #endif 146 #include <netinet6/in6_var.h> 147 #include <netinet6/nd6.h> 148 #endif 149 150 151 #include "carp.h" 152 #if NCARP > 0 153 #include <netinet/ip_carp.h> 154 #endif 155 156 #ifdef IPX 157 #include <netipx/ipx.h> 158 #include <netipx/ipx_if.h> 159 #endif 160 161 #ifdef NETATALK 162 #include <netatalk/at.h> 163 #include <netatalk/at_var.h> 164 #include <netatalk/at_extern.h> 165 166 #define llc_snap_org_code llc_un.type_snap.org_code 167 #define llc_snap_ether_type llc_un.type_snap.ether_type 168 169 extern u_char at_org_code[3]; 170 extern u_char aarp_org_code[3]; 171 #endif /* NETATALK */ 172 173 #ifdef MPLS 174 #include <netmpls/mpls.h> 175 #include <netmpls/mpls_var.h> 176 #endif 177 178 static struct timeval bigpktppslim_last; 179 static int bigpktppslim = 2; /* XXX */ 180 static int bigpktpps_count; 181 static kmutex_t bigpktpps_lock __cacheline_aligned; 182 183 184 const uint8_t etherbroadcastaddr[ETHER_ADDR_LEN] = 185 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 186 const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] = 187 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 }; 188 #define senderr(e) { error = (e); goto bad;} 189 190 static int ether_output(struct ifnet *, struct mbuf *, 191 const struct sockaddr *, struct rtentry *); 192 193 /* 194 * Ethernet output routine. 195 * Encapsulate a packet of type family for the local net. 196 * Assumes that ifp is actually pointer to ethercom structure. 197 */ 198 static int 199 ether_output(struct ifnet * const ifp0, struct mbuf * const m0, 200 const struct sockaddr * const dst, 201 struct rtentry *rt0) 202 { 203 uint16_t etype = 0; 204 int error = 0, hdrcmplt = 0; 205 uint8_t esrc[6], edst[6]; 206 struct mbuf *m = m0; 207 struct rtentry *rt; 208 struct mbuf *mcopy = NULL; 209 struct ether_header *eh; 210 struct ifnet *ifp = ifp0; 211 ALTQ_DECL(struct altq_pktattr pktattr;) 212 #ifdef INET 213 struct arphdr *ah; 214 #endif /* INET */ 215 #ifdef NETATALK 216 struct at_ifaddr *aa; 217 #endif /* NETATALK */ 218 219 #ifndef NET_MPSAFE 220 KASSERT(KERNEL_LOCKED_P()); 221 #endif 222 223 #ifdef MBUFTRACE 224 m_claimm(m, ifp->if_mowner); 225 #endif 226 227 #if NCARP > 0 228 if (ifp->if_type == IFT_CARP) { 229 struct ifaddr *ifa; 230 231 /* loop back if this is going to the carp interface */ 232 if (dst != NULL && ifp0->if_link_state == LINK_STATE_UP && 233 (ifa = ifa_ifwithaddr(dst)) != NULL && 234 ifa->ifa_ifp == ifp0) 235 return looutput(ifp0, m, dst, rt0); 236 237 ifp = ifp->if_carpdev; 238 /* ac = (struct arpcom *)ifp; */ 239 240 if ((ifp0->if_flags & (IFF_UP|IFF_RUNNING)) != 241 (IFF_UP|IFF_RUNNING)) 242 senderr(ENETDOWN); 243 } 244 #endif /* NCARP > 0 */ 245 246 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 247 senderr(ENETDOWN); 248 if ((rt = rt0) != NULL) { 249 if ((rt->rt_flags & RTF_UP) == 0) { 250 if ((rt0 = rt = rtalloc1(dst, 1)) != NULL) { 251 rt->rt_refcnt--; 252 if (rt->rt_ifp != ifp) 253 return (*rt->rt_ifp->if_output) 254 (ifp, m0, dst, rt); 255 } else 256 senderr(EHOSTUNREACH); 257 } 258 if ((rt->rt_flags & RTF_GATEWAY) && dst->sa_family != AF_NS) { 259 if (rt->rt_gwroute == NULL) 260 goto lookup; 261 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 262 rtfree(rt); rt = rt0; 263 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1); 264 if ((rt = rt->rt_gwroute) == NULL) 265 senderr(EHOSTUNREACH); 266 /* the "G" test below also prevents rt == rt0 */ 267 if ((rt->rt_flags & RTF_GATEWAY) || 268 (rt->rt_ifp != ifp)) { 269 rt->rt_refcnt--; 270 rt0->rt_gwroute = NULL; 271 senderr(EHOSTUNREACH); 272 } 273 } 274 } 275 if (rt->rt_flags & RTF_REJECT) 276 if (rt->rt_rmx.rmx_expire == 0 || 277 (u_long) time_second < rt->rt_rmx.rmx_expire) 278 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 279 } 280 281 switch (dst->sa_family) { 282 283 #ifdef INET 284 case AF_INET: 285 if (m->m_flags & M_BCAST) 286 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 287 else if (m->m_flags & M_MCAST) 288 ETHER_MAP_IP_MULTICAST(&satocsin(dst)->sin_addr, edst); 289 else if (!arpresolve(ifp, rt, m, dst, edst)) 290 return (0); /* if not yet resolved */ 291 /* If broadcasting on a simplex interface, loopback a copy */ 292 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 293 mcopy = m_copy(m, 0, (int)M_COPYALL); 294 etype = htons(ETHERTYPE_IP); 295 break; 296 297 case AF_ARP: 298 ah = mtod(m, struct arphdr *); 299 if (m->m_flags & M_BCAST) 300 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 301 else { 302 void *tha = ar_tha(ah); 303 304 if (tha == NULL) { 305 /* fake with ARPHDR_IEEE1394 */ 306 return 0; 307 } 308 memcpy(edst, tha, sizeof(edst)); 309 } 310 311 ah->ar_hrd = htons(ARPHRD_ETHER); 312 313 switch (ntohs(ah->ar_op)) { 314 case ARPOP_REVREQUEST: 315 case ARPOP_REVREPLY: 316 etype = htons(ETHERTYPE_REVARP); 317 break; 318 319 case ARPOP_REQUEST: 320 case ARPOP_REPLY: 321 default: 322 etype = htons(ETHERTYPE_ARP); 323 } 324 325 break; 326 #endif 327 #ifdef INET6 328 case AF_INET6: 329 if (!nd6_storelladdr(ifp, rt, m, dst, edst, sizeof(edst))){ 330 /* something bad happened */ 331 return (0); 332 } 333 etype = htons(ETHERTYPE_IPV6); 334 break; 335 #endif 336 #ifdef NETATALK 337 case AF_APPLETALK: 338 if (!aarpresolve(ifp, m, (const struct sockaddr_at *)dst, edst)) { 339 #ifdef NETATALKDEBUG 340 printf("aarpresolv failed\n"); 341 #endif /* NETATALKDEBUG */ 342 return (0); 343 } 344 /* 345 * ifaddr is the first thing in at_ifaddr 346 */ 347 aa = (struct at_ifaddr *) at_ifawithnet( 348 (const struct sockaddr_at *)dst, ifp); 349 if (aa == NULL) 350 goto bad; 351 352 /* 353 * In the phase 2 case, we need to prepend an mbuf for the 354 * llc header. Since we must preserve the value of m, 355 * which is passed to us by value, we m_copy() the first 356 * mbuf, and use it for our llc header. 357 */ 358 if (aa->aa_flags & AFA_PHASE2) { 359 struct llc llc; 360 361 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 362 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 363 llc.llc_control = LLC_UI; 364 memcpy(llc.llc_snap_org_code, at_org_code, 365 sizeof(llc.llc_snap_org_code)); 366 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 367 memcpy(mtod(m, void *), &llc, sizeof(struct llc)); 368 } else { 369 etype = htons(ETHERTYPE_ATALK); 370 } 371 break; 372 #endif /* NETATALK */ 373 #ifdef IPX 374 case AF_IPX: 375 etype = htons(ETHERTYPE_IPX); 376 memcpy(edst, 377 &(((const struct sockaddr_ipx *)dst)->sipx_addr.x_host), 378 sizeof(edst)); 379 /* If broadcasting on a simplex interface, loopback a copy */ 380 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 381 mcopy = m_copy(m, 0, (int)M_COPYALL); 382 break; 383 #endif 384 case pseudo_AF_HDRCMPLT: 385 hdrcmplt = 1; 386 memcpy(esrc, 387 ((const struct ether_header *)dst->sa_data)->ether_shost, 388 sizeof(esrc)); 389 /* FALLTHROUGH */ 390 391 case AF_UNSPEC: 392 memcpy(edst, 393 ((const struct ether_header *)dst->sa_data)->ether_dhost, 394 sizeof(edst)); 395 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 396 etype = ((const struct ether_header *)dst->sa_data)->ether_type; 397 break; 398 399 default: 400 printf("%s: can't handle af%d\n", ifp->if_xname, 401 dst->sa_family); 402 senderr(EAFNOSUPPORT); 403 } 404 405 #ifdef MPLS 406 if (rt0 != NULL && rt_gettag(rt0) != NULL && 407 rt_gettag(rt0)->sa_family == AF_MPLS && 408 (m->m_flags & (M_MCAST | M_BCAST)) == 0) { 409 union mpls_shim msh; 410 msh.s_addr = MPLS_GETSADDR(rt0); 411 if (msh.shim.label != MPLS_LABEL_IMPLNULL) 412 etype = htons(ETHERTYPE_MPLS); 413 } 414 #endif 415 416 if (mcopy) 417 (void)looutput(ifp, mcopy, dst, rt); 418 419 /* If no ether type is set, this must be a 802.2 formatted packet. 420 */ 421 if (etype == 0) 422 etype = htons(m->m_pkthdr.len); 423 /* 424 * Add local net header. If no space in first mbuf, 425 * allocate another. 426 */ 427 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 428 if (m == 0) 429 senderr(ENOBUFS); 430 eh = mtod(m, struct ether_header *); 431 /* Note: etype is already in network byte order. */ 432 (void)memcpy(&eh->ether_type, &etype, sizeof(eh->ether_type)); 433 memcpy(eh->ether_dhost, edst, sizeof(edst)); 434 if (hdrcmplt) 435 memcpy(eh->ether_shost, esrc, sizeof(eh->ether_shost)); 436 else 437 memcpy(eh->ether_shost, CLLADDR(ifp->if_sadl), 438 sizeof(eh->ether_shost)); 439 440 #if NCARP > 0 441 if (ifp0 != ifp && ifp0->if_type == IFT_CARP) { 442 memcpy(eh->ether_shost, CLLADDR(ifp0->if_sadl), 443 sizeof(eh->ether_shost)); 444 } 445 #endif /* NCARP > 0 */ 446 447 if ((error = pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 448 return (error); 449 if (m == NULL) 450 return (0); 451 452 #if NBRIDGE > 0 453 /* 454 * Bridges require special output handling. 455 */ 456 if (ifp->if_bridge) 457 return (bridge_output(ifp, m, NULL, NULL)); 458 #endif 459 460 #if NCARP > 0 461 if (ifp != ifp0) 462 ifp0->if_obytes += m->m_pkthdr.len + ETHER_HDR_LEN; 463 #endif /* NCARP > 0 */ 464 465 #ifdef ALTQ 466 /* 467 * If ALTQ is enabled on the parent interface, do 468 * classification; the queueing discipline might not 469 * require classification, but might require the 470 * address family/header pointer in the pktattr. 471 */ 472 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 473 altq_etherclassify(&ifp->if_snd, m, &pktattr); 474 #endif 475 return ifq_enqueue(ifp, m ALTQ_COMMA ALTQ_DECL(&pktattr)); 476 477 bad: 478 if (m) 479 m_freem(m); 480 return (error); 481 } 482 483 #ifdef ALTQ 484 /* 485 * This routine is a slight hack to allow a packet to be classified 486 * if the Ethernet headers are present. It will go away when ALTQ's 487 * classification engine understands link headers. 488 */ 489 void 490 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m, 491 struct altq_pktattr *pktattr) 492 { 493 struct ether_header *eh; 494 uint16_t ether_type; 495 int hlen, af, hdrsize; 496 void *hdr; 497 498 hlen = ETHER_HDR_LEN; 499 eh = mtod(m, struct ether_header *); 500 501 ether_type = htons(eh->ether_type); 502 503 if (ether_type < ETHERMTU) { 504 /* LLC/SNAP */ 505 struct llc *llc = (struct llc *)(eh + 1); 506 hlen += 8; 507 508 if (m->m_len < hlen || 509 llc->llc_dsap != LLC_SNAP_LSAP || 510 llc->llc_ssap != LLC_SNAP_LSAP || 511 llc->llc_control != LLC_UI) { 512 /* Not SNAP. */ 513 goto bad; 514 } 515 516 ether_type = htons(llc->llc_un.type_snap.ether_type); 517 } 518 519 switch (ether_type) { 520 case ETHERTYPE_IP: 521 af = AF_INET; 522 hdrsize = 20; /* sizeof(struct ip) */ 523 break; 524 525 case ETHERTYPE_IPV6: 526 af = AF_INET6; 527 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 528 break; 529 530 default: 531 af = AF_UNSPEC; 532 hdrsize = 0; 533 break; 534 } 535 536 while (m->m_len <= hlen) { 537 hlen -= m->m_len; 538 m = m->m_next; 539 } 540 if (m->m_len < (hlen + hdrsize)) { 541 /* 542 * protocol header not in a single mbuf. 543 * We can't cope with this situation right 544 * now (but it shouldn't ever happen, really, anyhow). 545 */ 546 #ifdef DEBUG 547 printf("altq_etherclassify: headers span multiple mbufs: " 548 "%d < %d\n", m->m_len, (hlen + hdrsize)); 549 #endif 550 goto bad; 551 } 552 553 m->m_data += hlen; 554 m->m_len -= hlen; 555 556 hdr = mtod(m, void *); 557 558 if (ALTQ_NEEDS_CLASSIFY(ifq)) 559 pktattr->pattr_class = 560 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 561 pktattr->pattr_af = af; 562 pktattr->pattr_hdr = hdr; 563 564 m->m_data -= hlen; 565 m->m_len += hlen; 566 567 return; 568 569 bad: 570 pktattr->pattr_class = NULL; 571 pktattr->pattr_hdr = NULL; 572 pktattr->pattr_af = AF_UNSPEC; 573 } 574 #endif /* ALTQ */ 575 576 /* 577 * Process a received Ethernet packet; 578 * the packet is in the mbuf chain m with 579 * the ether header. 580 */ 581 void 582 ether_input(struct ifnet *ifp, struct mbuf *m) 583 { 584 struct ethercom *ec = (struct ethercom *) ifp; 585 pktqueue_t *pktq = NULL; 586 struct ifqueue *inq = NULL; 587 uint16_t etype; 588 struct ether_header *eh; 589 size_t ehlen; 590 static int earlypkts; 591 int isr = 0; 592 #if defined (LLC) || defined(NETATALK) 593 struct llc *l; 594 #endif 595 596 if ((ifp->if_flags & IFF_UP) == 0) { 597 m_freem(m); 598 return; 599 } 600 601 #ifdef MBUFTRACE 602 m_claimm(m, &ec->ec_rx_mowner); 603 #endif 604 eh = mtod(m, struct ether_header *); 605 etype = ntohs(eh->ether_type); 606 ehlen = sizeof(*eh); 607 608 if(__predict_false(earlypkts < 100 || !rnd_initial_entropy)) { 609 rnd_add_data(NULL, eh, ehlen, 0); 610 earlypkts++; 611 } 612 613 /* 614 * Determine if the packet is within its size limits. 615 */ 616 if (etype != ETHERTYPE_MPLS && m->m_pkthdr.len > 617 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 618 mutex_enter(&bigpktpps_lock); 619 if (ppsratecheck(&bigpktppslim_last, &bigpktpps_count, 620 bigpktppslim)) { 621 printf("%s: discarding oversize frame (len=%d)\n", 622 ifp->if_xname, m->m_pkthdr.len); 623 } 624 mutex_exit(&bigpktpps_lock); 625 m_freem(m); 626 return; 627 } 628 629 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 630 /* 631 * If this is not a simplex interface, drop the packet 632 * if it came from us. 633 */ 634 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 635 memcmp(CLLADDR(ifp->if_sadl), eh->ether_shost, 636 ETHER_ADDR_LEN) == 0) { 637 m_freem(m); 638 return; 639 } 640 641 if (memcmp(etherbroadcastaddr, 642 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 643 m->m_flags |= M_BCAST; 644 else 645 m->m_flags |= M_MCAST; 646 ifp->if_imcasts++; 647 } 648 649 /* If the CRC is still on the packet, trim it off. */ 650 if (m->m_flags & M_HASFCS) { 651 m_adj(m, -ETHER_CRC_LEN); 652 m->m_flags &= ~M_HASFCS; 653 } 654 655 ifp->if_ibytes += m->m_pkthdr.len; 656 657 #if NCARP > 0 658 if (__predict_false(ifp->if_carp && ifp->if_type != IFT_CARP)) { 659 /* 660 * clear M_PROMISC, in case the packets comes from a 661 * vlan 662 */ 663 m->m_flags &= ~M_PROMISC; 664 if (carp_input(m, (uint8_t *)&eh->ether_shost, 665 (uint8_t *)&eh->ether_dhost, eh->ether_type) == 0) 666 return; 667 } 668 #endif /* NCARP > 0 */ 669 if ((m->m_flags & (M_BCAST|M_MCAST|M_PROMISC)) == 0 && 670 (ifp->if_flags & IFF_PROMISC) != 0 && 671 memcmp(CLLADDR(ifp->if_sadl), eh->ether_dhost, 672 ETHER_ADDR_LEN) != 0) { 673 m->m_flags |= M_PROMISC; 674 } 675 676 if ((m->m_flags & M_PROMISC) == 0) { 677 if (pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 678 return; 679 if (m == NULL) 680 return; 681 682 eh = mtod(m, struct ether_header *); 683 etype = ntohs(eh->ether_type); 684 ehlen = sizeof(*eh); 685 } 686 687 #if NAGR > 0 688 if (ifp->if_agrprivate && 689 __predict_true(etype != ETHERTYPE_SLOWPROTOCOLS)) { 690 m->m_flags &= ~M_PROMISC; 691 agr_input(ifp, m); 692 return; 693 } 694 #endif /* NAGR > 0 */ 695 696 /* 697 * If VLANs are configured on the interface, check to 698 * see if the device performed the decapsulation and 699 * provided us with the tag. 700 */ 701 if (ec->ec_nvlans && m_tag_find(m, PACKET_TAG_VLAN, NULL) != NULL) { 702 #if NVLAN > 0 703 /* 704 * vlan_input() will either recursively call ether_input() 705 * or drop the packet. 706 */ 707 vlan_input(ifp, m); 708 #else 709 m_freem(m); 710 #endif 711 return; 712 } 713 714 /* 715 * Handle protocols that expect to have the Ethernet header 716 * (and possibly FCS) intact. 717 */ 718 switch (etype) { 719 case ETHERTYPE_VLAN: { 720 struct ether_vlan_header *evl = (void *)eh; 721 /* 722 * If there is a tag of 0, then the VLAN header was probably 723 * just being used to store the priority. Extract the ether 724 * type, and if IP or IPV6, let them deal with it. 725 */ 726 if (m->m_len <= sizeof(*evl) 727 && EVL_VLANOFTAG(evl->evl_tag) == 0) { 728 etype = ntohs(evl->evl_proto); 729 ehlen = sizeof(*evl); 730 if ((m->m_flags & M_PROMISC) == 0 731 && (etype == ETHERTYPE_IP 732 || etype == ETHERTYPE_IPV6)) 733 break; 734 } 735 #if NVLAN > 0 736 /* 737 * vlan_input() will either recursively call ether_input() 738 * or drop the packet. 739 */ 740 if (((struct ethercom *)ifp)->ec_nvlans != 0) 741 vlan_input(ifp, m); 742 else 743 #endif /* NVLAN > 0 */ 744 m_freem(m); 745 return; 746 } 747 #if NPPPOE > 0 748 case ETHERTYPE_PPPOEDISC: 749 case ETHERTYPE_PPPOE: 750 if (m->m_flags & M_PROMISC) { 751 m_freem(m); 752 return; 753 } 754 #ifndef PPPOE_SERVER 755 if (m->m_flags & (M_MCAST | M_BCAST)) { 756 m_freem(m); 757 return; 758 } 759 #endif 760 761 if (etype == ETHERTYPE_PPPOEDISC) 762 inq = &ppoediscinq; 763 else 764 inq = &ppoeinq; 765 if (IF_QFULL(inq)) { 766 IF_DROP(inq); 767 m_freem(m); 768 } else { 769 IF_ENQUEUE(inq, m); 770 softint_schedule(pppoe_softintr); 771 } 772 return; 773 #endif /* NPPPOE > 0 */ 774 case ETHERTYPE_SLOWPROTOCOLS: { 775 uint8_t subtype; 776 777 #if defined(DIAGNOSTIC) 778 if (m->m_pkthdr.len < sizeof(*eh) + sizeof(subtype)) { 779 panic("ether_input: too short slow protocol packet"); 780 } 781 #endif 782 m_copydata(m, sizeof(*eh), sizeof(subtype), &subtype); 783 switch (subtype) { 784 #if NAGR > 0 785 case SLOWPROTOCOLS_SUBTYPE_LACP: 786 if (ifp->if_agrprivate) { 787 ieee8023ad_lacp_input(ifp, m); 788 return; 789 } 790 break; 791 792 case SLOWPROTOCOLS_SUBTYPE_MARKER: 793 if (ifp->if_agrprivate) { 794 ieee8023ad_marker_input(ifp, m); 795 return; 796 } 797 break; 798 #endif /* NAGR > 0 */ 799 default: 800 if (subtype == 0 || subtype > 10) { 801 /* illegal value */ 802 m_freem(m); 803 return; 804 } 805 /* unknown subtype */ 806 break; 807 } 808 /* FALLTHROUGH */ 809 } 810 default: 811 if (m->m_flags & M_PROMISC) { 812 m_freem(m); 813 return; 814 } 815 } 816 817 /* If the CRC is still on the packet, trim it off. */ 818 if (m->m_flags & M_HASFCS) { 819 m_adj(m, -ETHER_CRC_LEN); 820 m->m_flags &= ~M_HASFCS; 821 } 822 823 if (etype > ETHERMTU + sizeof (struct ether_header)) { 824 /* Strip off the Ethernet header. */ 825 m_adj(m, ehlen); 826 827 switch (etype) { 828 #ifdef INET 829 case ETHERTYPE_IP: 830 #ifdef GATEWAY 831 if (ipflow_fastforward(m)) 832 return; 833 #endif 834 pktq = ip_pktq; 835 break; 836 837 case ETHERTYPE_ARP: 838 isr = NETISR_ARP; 839 inq = &arpintrq; 840 break; 841 842 case ETHERTYPE_REVARP: 843 revarpinput(m); /* XXX queue? */ 844 return; 845 #endif 846 #ifdef INET6 847 case ETHERTYPE_IPV6: 848 if (__predict_false(!in6_present)) { 849 m_freem(m); 850 return; 851 } 852 #ifdef GATEWAY 853 if (ip6flow_fastforward(&m)) 854 return; 855 #endif 856 pktq = ip6_pktq; 857 break; 858 #endif 859 #ifdef IPX 860 case ETHERTYPE_IPX: 861 isr = NETISR_IPX; 862 inq = &ipxintrq; 863 break; 864 #endif 865 #ifdef NETATALK 866 case ETHERTYPE_ATALK: 867 isr = NETISR_ATALK; 868 inq = &atintrq1; 869 break; 870 case ETHERTYPE_AARP: 871 /* probably this should be done with a NETISR as well */ 872 aarpinput(ifp, m); /* XXX */ 873 return; 874 #endif /* NETATALK */ 875 #ifdef MPLS 876 case ETHERTYPE_MPLS: 877 isr = NETISR_MPLS; 878 inq = &mplsintrq; 879 break; 880 #endif 881 default: 882 m_freem(m); 883 return; 884 } 885 } else { 886 #if defined (LLC) || defined (NETATALK) 887 l = (struct llc *)(eh+1); 888 switch (l->llc_dsap) { 889 #ifdef NETATALK 890 case LLC_SNAP_LSAP: 891 switch (l->llc_control) { 892 case LLC_UI: 893 if (l->llc_ssap != LLC_SNAP_LSAP) { 894 goto dropanyway; 895 } 896 897 if (memcmp(&(l->llc_snap_org_code)[0], 898 at_org_code, sizeof(at_org_code)) == 0 && 899 ntohs(l->llc_snap_ether_type) == 900 ETHERTYPE_ATALK) { 901 inq = &atintrq2; 902 m_adj(m, sizeof(struct ether_header) 903 + sizeof(struct llc)); 904 isr = NETISR_ATALK; 905 break; 906 } 907 908 if (memcmp(&(l->llc_snap_org_code)[0], 909 aarp_org_code, 910 sizeof(aarp_org_code)) == 0 && 911 ntohs(l->llc_snap_ether_type) == 912 ETHERTYPE_AARP) { 913 m_adj( m, sizeof(struct ether_header) 914 + sizeof(struct llc)); 915 aarpinput(ifp, m); /* XXX */ 916 return; 917 } 918 919 default: 920 goto dropanyway; 921 } 922 break; 923 dropanyway: 924 #endif 925 default: 926 m_freem(m); 927 return; 928 } 929 #else /* ISO || LLC || NETATALK*/ 930 m_freem(m); 931 return; 932 #endif /* ISO || LLC || NETATALK*/ 933 } 934 935 if (__predict_true(pktq)) { 936 const uint32_t h = pktq_rps_hash(m); 937 if (__predict_false(!pktq_enqueue(pktq, m, h))) { 938 m_freem(m); 939 } 940 return; 941 } 942 943 if (__predict_false(!inq)) { 944 /* Should not happen. */ 945 m_freem(m); 946 return; 947 } 948 if (IF_QFULL(inq)) { 949 IF_DROP(inq); 950 m_freem(m); 951 } else { 952 IF_ENQUEUE(inq, m); 953 schednetisr(isr); 954 } 955 } 956 957 /* 958 * Convert Ethernet address to printable (loggable) representation. 959 */ 960 char * 961 ether_sprintf(const u_char *ap) 962 { 963 static char etherbuf[3 * ETHER_ADDR_LEN]; 964 return ether_snprintf(etherbuf, sizeof(etherbuf), ap); 965 } 966 967 char * 968 ether_snprintf(char *buf, size_t len, const u_char *ap) 969 { 970 char *cp = buf; 971 size_t i; 972 973 for (i = 0; i < len / 3; i++) { 974 *cp++ = hexdigits[*ap >> 4]; 975 *cp++ = hexdigits[*ap++ & 0xf]; 976 *cp++ = ':'; 977 } 978 *--cp = '\0'; 979 return buf; 980 } 981 982 /* 983 * Perform common duties while attaching to interface list 984 */ 985 void 986 ether_ifattach(struct ifnet *ifp, const uint8_t *lla) 987 { 988 struct ethercom *ec = (struct ethercom *)ifp; 989 990 ifp->if_type = IFT_ETHER; 991 ifp->if_hdrlen = ETHER_HDR_LEN; 992 ifp->if_dlt = DLT_EN10MB; 993 ifp->if_mtu = ETHERMTU; 994 ifp->if_output = ether_output; 995 ifp->if_input = ether_input; 996 if (ifp->if_baudrate == 0) 997 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 998 999 if_set_sadl(ifp, lla, ETHER_ADDR_LEN, !ETHER_IS_LOCAL(lla)); 1000 1001 LIST_INIT(&ec->ec_multiaddrs); 1002 ifp->if_broadcastaddr = etherbroadcastaddr; 1003 bpf_attach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 1004 #ifdef MBUFTRACE 1005 strlcpy(ec->ec_tx_mowner.mo_name, ifp->if_xname, 1006 sizeof(ec->ec_tx_mowner.mo_name)); 1007 strlcpy(ec->ec_tx_mowner.mo_descr, "tx", 1008 sizeof(ec->ec_tx_mowner.mo_descr)); 1009 strlcpy(ec->ec_rx_mowner.mo_name, ifp->if_xname, 1010 sizeof(ec->ec_rx_mowner.mo_name)); 1011 strlcpy(ec->ec_rx_mowner.mo_descr, "rx", 1012 sizeof(ec->ec_rx_mowner.mo_descr)); 1013 MOWNER_ATTACH(&ec->ec_tx_mowner); 1014 MOWNER_ATTACH(&ec->ec_rx_mowner); 1015 ifp->if_mowner = &ec->ec_tx_mowner; 1016 #endif 1017 } 1018 1019 void 1020 ether_ifdetach(struct ifnet *ifp) 1021 { 1022 struct ethercom *ec = (void *) ifp; 1023 struct ether_multi *enm; 1024 int s; 1025 1026 /* 1027 * Prevent further calls to ioctl (for example turning off 1028 * promiscuous mode from the bridge code), which eventually can 1029 * call if_init() which can cause panics because the interface 1030 * is in the process of being detached. Return device not configured 1031 * instead. 1032 */ 1033 ifp->if_ioctl = (int (*)(struct ifnet *, u_long, void *))enxio; 1034 1035 #if NBRIDGE > 0 1036 if (ifp->if_bridge) 1037 bridge_ifdetach(ifp); 1038 #endif 1039 1040 bpf_detach(ifp); 1041 1042 #if NVLAN > 0 1043 if (ec->ec_nvlans) 1044 vlan_ifdetach(ifp); 1045 #endif 1046 1047 s = splnet(); 1048 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1049 LIST_REMOVE(enm, enm_list); 1050 free(enm, M_IFMADDR); 1051 ec->ec_multicnt--; 1052 } 1053 splx(s); 1054 1055 ifp->if_mowner = NULL; 1056 MOWNER_DETACH(&ec->ec_rx_mowner); 1057 MOWNER_DETACH(&ec->ec_tx_mowner); 1058 } 1059 1060 #if 0 1061 /* 1062 * This is for reference. We have a table-driven version 1063 * of the little-endian crc32 generator, which is faster 1064 * than the double-loop. 1065 */ 1066 uint32_t 1067 ether_crc32_le(const uint8_t *buf, size_t len) 1068 { 1069 uint32_t c, crc, carry; 1070 size_t i, j; 1071 1072 crc = 0xffffffffU; /* initial value */ 1073 1074 for (i = 0; i < len; i++) { 1075 c = buf[i]; 1076 for (j = 0; j < 8; j++) { 1077 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1078 crc >>= 1; 1079 c >>= 1; 1080 if (carry) 1081 crc = (crc ^ ETHER_CRC_POLY_LE); 1082 } 1083 } 1084 1085 return (crc); 1086 } 1087 #else 1088 uint32_t 1089 ether_crc32_le(const uint8_t *buf, size_t len) 1090 { 1091 static const uint32_t crctab[] = { 1092 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1093 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1094 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1095 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1096 }; 1097 uint32_t crc; 1098 size_t i; 1099 1100 crc = 0xffffffffU; /* initial value */ 1101 1102 for (i = 0; i < len; i++) { 1103 crc ^= buf[i]; 1104 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1105 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1106 } 1107 1108 return (crc); 1109 } 1110 #endif 1111 1112 uint32_t 1113 ether_crc32_be(const uint8_t *buf, size_t len) 1114 { 1115 uint32_t c, crc, carry; 1116 size_t i, j; 1117 1118 crc = 0xffffffffU; /* initial value */ 1119 1120 for (i = 0; i < len; i++) { 1121 c = buf[i]; 1122 for (j = 0; j < 8; j++) { 1123 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1124 crc <<= 1; 1125 c >>= 1; 1126 if (carry) 1127 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1128 } 1129 } 1130 1131 return (crc); 1132 } 1133 1134 #ifdef INET 1135 const uint8_t ether_ipmulticast_min[ETHER_ADDR_LEN] = 1136 { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1137 const uint8_t ether_ipmulticast_max[ETHER_ADDR_LEN] = 1138 { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1139 #endif 1140 #ifdef INET6 1141 const uint8_t ether_ip6multicast_min[ETHER_ADDR_LEN] = 1142 { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1143 const uint8_t ether_ip6multicast_max[ETHER_ADDR_LEN] = 1144 { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1145 #endif 1146 1147 /* 1148 * ether_aton implementation, not using a static buffer. 1149 */ 1150 int 1151 ether_aton_r(u_char *dest, size_t len, const char *str) 1152 { 1153 const u_char *cp = (const void *)str; 1154 u_char *ep; 1155 1156 #define atox(c) (((c) <= '9') ? ((c) - '0') : ((toupper(c) - 'A') + 10)) 1157 1158 if (len < ETHER_ADDR_LEN) 1159 return ENOSPC; 1160 1161 ep = dest + ETHER_ADDR_LEN; 1162 1163 while (*cp) { 1164 if (!isxdigit(*cp)) 1165 return EINVAL; 1166 *dest = atox(*cp); 1167 cp++; 1168 if (isxdigit(*cp)) { 1169 *dest = (*dest << 4) | atox(*cp); 1170 dest++; 1171 cp++; 1172 } else 1173 dest++; 1174 if (dest == ep) 1175 return *cp == '\0' ? 0 : ENAMETOOLONG; 1176 switch (*cp) { 1177 case ':': 1178 case '-': 1179 case '.': 1180 cp++; 1181 break; 1182 } 1183 } 1184 return ENOBUFS; 1185 } 1186 1187 /* 1188 * Convert a sockaddr into an Ethernet address or range of Ethernet 1189 * addresses. 1190 */ 1191 int 1192 ether_multiaddr(const struct sockaddr *sa, uint8_t addrlo[ETHER_ADDR_LEN], 1193 uint8_t addrhi[ETHER_ADDR_LEN]) 1194 { 1195 #ifdef INET 1196 const struct sockaddr_in *sin; 1197 #endif /* INET */ 1198 #ifdef INET6 1199 const struct sockaddr_in6 *sin6; 1200 #endif /* INET6 */ 1201 1202 switch (sa->sa_family) { 1203 1204 case AF_UNSPEC: 1205 memcpy(addrlo, sa->sa_data, ETHER_ADDR_LEN); 1206 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1207 break; 1208 1209 #ifdef INET 1210 case AF_INET: 1211 sin = satocsin(sa); 1212 if (sin->sin_addr.s_addr == INADDR_ANY) { 1213 /* 1214 * An IP address of INADDR_ANY means listen to 1215 * or stop listening to all of the Ethernet 1216 * multicast addresses used for IP. 1217 * (This is for the sake of IP multicast routers.) 1218 */ 1219 memcpy(addrlo, ether_ipmulticast_min, ETHER_ADDR_LEN); 1220 memcpy(addrhi, ether_ipmulticast_max, ETHER_ADDR_LEN); 1221 } 1222 else { 1223 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1224 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1225 } 1226 break; 1227 #endif 1228 #ifdef INET6 1229 case AF_INET6: 1230 sin6 = satocsin6(sa); 1231 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1232 /* 1233 * An IP6 address of 0 means listen to or stop 1234 * listening to all of the Ethernet multicast 1235 * address used for IP6. 1236 * (This is used for multicast routers.) 1237 */ 1238 memcpy(addrlo, ether_ip6multicast_min, ETHER_ADDR_LEN); 1239 memcpy(addrhi, ether_ip6multicast_max, ETHER_ADDR_LEN); 1240 } else { 1241 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1242 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1243 } 1244 break; 1245 #endif 1246 1247 default: 1248 return EAFNOSUPPORT; 1249 } 1250 return 0; 1251 } 1252 1253 /* 1254 * Add an Ethernet multicast address or range of addresses to the list for a 1255 * given interface. 1256 */ 1257 int 1258 ether_addmulti(const struct sockaddr *sa, struct ethercom *ec) 1259 { 1260 struct ether_multi *enm; 1261 u_char addrlo[ETHER_ADDR_LEN]; 1262 u_char addrhi[ETHER_ADDR_LEN]; 1263 int s = splnet(), error; 1264 1265 error = ether_multiaddr(sa, addrlo, addrhi); 1266 if (error != 0) { 1267 splx(s); 1268 return error; 1269 } 1270 1271 /* 1272 * Verify that we have valid Ethernet multicast addresses. 1273 */ 1274 if (!ETHER_IS_MULTICAST(addrlo) || !ETHER_IS_MULTICAST(addrhi)) { 1275 splx(s); 1276 return EINVAL; 1277 } 1278 /* 1279 * See if the address range is already in the list. 1280 */ 1281 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1282 if (enm != NULL) { 1283 /* 1284 * Found it; just increment the reference count. 1285 */ 1286 ++enm->enm_refcount; 1287 splx(s); 1288 return 0; 1289 } 1290 /* 1291 * New address or range; malloc a new multicast record 1292 * and link it into the interface's multicast list. 1293 */ 1294 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1295 if (enm == NULL) { 1296 splx(s); 1297 return ENOBUFS; 1298 } 1299 memcpy(enm->enm_addrlo, addrlo, 6); 1300 memcpy(enm->enm_addrhi, addrhi, 6); 1301 enm->enm_refcount = 1; 1302 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1303 ec->ec_multicnt++; 1304 splx(s); 1305 /* 1306 * Return ENETRESET to inform the driver that the list has changed 1307 * and its reception filter should be adjusted accordingly. 1308 */ 1309 return ENETRESET; 1310 } 1311 1312 /* 1313 * Delete a multicast address record. 1314 */ 1315 int 1316 ether_delmulti(const struct sockaddr *sa, struct ethercom *ec) 1317 { 1318 struct ether_multi *enm; 1319 u_char addrlo[ETHER_ADDR_LEN]; 1320 u_char addrhi[ETHER_ADDR_LEN]; 1321 int s = splnet(), error; 1322 1323 error = ether_multiaddr(sa, addrlo, addrhi); 1324 if (error != 0) { 1325 splx(s); 1326 return (error); 1327 } 1328 1329 /* 1330 * Look ur the address in our list. 1331 */ 1332 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1333 if (enm == NULL) { 1334 splx(s); 1335 return (ENXIO); 1336 } 1337 if (--enm->enm_refcount != 0) { 1338 /* 1339 * Still some claims to this record. 1340 */ 1341 splx(s); 1342 return (0); 1343 } 1344 /* 1345 * No remaining claims to this record; unlink and free it. 1346 */ 1347 LIST_REMOVE(enm, enm_list); 1348 free(enm, M_IFMADDR); 1349 ec->ec_multicnt--; 1350 splx(s); 1351 /* 1352 * Return ENETRESET to inform the driver that the list has changed 1353 * and its reception filter should be adjusted accordingly. 1354 */ 1355 return (ENETRESET); 1356 } 1357 1358 void 1359 ether_set_ifflags_cb(struct ethercom *ec, ether_cb_t cb) 1360 { 1361 ec->ec_ifflags_cb = cb; 1362 } 1363 1364 /* 1365 * Common ioctls for Ethernet interfaces. Note, we must be 1366 * called at splnet(). 1367 */ 1368 int 1369 ether_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1370 { 1371 struct ethercom *ec = (void *) ifp; 1372 struct eccapreq *eccr; 1373 struct ifreq *ifr = (struct ifreq *)data; 1374 struct if_laddrreq *iflr = data; 1375 const struct sockaddr_dl *sdl; 1376 static const uint8_t zero[ETHER_ADDR_LEN]; 1377 int error; 1378 1379 switch (cmd) { 1380 case SIOCINITIFADDR: 1381 { 1382 struct ifaddr *ifa = (struct ifaddr *)data; 1383 if (ifa->ifa_addr->sa_family != AF_LINK 1384 && (ifp->if_flags & (IFF_UP|IFF_RUNNING)) != 1385 (IFF_UP|IFF_RUNNING)) { 1386 ifp->if_flags |= IFF_UP; 1387 if ((error = (*ifp->if_init)(ifp)) != 0) 1388 return error; 1389 } 1390 #ifdef INET 1391 if (ifa->ifa_addr->sa_family == AF_INET) 1392 arp_ifinit(ifp, ifa); 1393 #endif /* INET */ 1394 return 0; 1395 } 1396 1397 case SIOCSIFMTU: 1398 { 1399 int maxmtu; 1400 1401 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1402 maxmtu = ETHERMTU_JUMBO; 1403 else 1404 maxmtu = ETHERMTU; 1405 1406 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1407 return EINVAL; 1408 else if ((error = ifioctl_common(ifp, cmd, data)) != ENETRESET) 1409 return error; 1410 else if (ifp->if_flags & IFF_UP) { 1411 /* Make sure the device notices the MTU change. */ 1412 return (*ifp->if_init)(ifp); 1413 } else 1414 return 0; 1415 } 1416 1417 case SIOCSIFFLAGS: 1418 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1419 return error; 1420 switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) { 1421 case IFF_RUNNING: 1422 /* 1423 * If interface is marked down and it is running, 1424 * then stop and disable it. 1425 */ 1426 (*ifp->if_stop)(ifp, 1); 1427 break; 1428 case IFF_UP: 1429 /* 1430 * If interface is marked up and it is stopped, then 1431 * start it. 1432 */ 1433 return (*ifp->if_init)(ifp); 1434 case IFF_UP|IFF_RUNNING: 1435 error = 0; 1436 if (ec->ec_ifflags_cb == NULL || 1437 (error = (*ec->ec_ifflags_cb)(ec)) == ENETRESET) { 1438 /* 1439 * Reset the interface to pick up 1440 * changes in any other flags that 1441 * affect the hardware state. 1442 */ 1443 return (*ifp->if_init)(ifp); 1444 } else 1445 return error; 1446 case 0: 1447 break; 1448 } 1449 return 0; 1450 case SIOCGETHERCAP: 1451 eccr = (struct eccapreq *)data; 1452 eccr->eccr_capabilities = ec->ec_capabilities; 1453 eccr->eccr_capenable = ec->ec_capenable; 1454 return 0; 1455 case SIOCADDMULTI: 1456 return ether_addmulti(ifreq_getaddr(cmd, ifr), ec); 1457 case SIOCDELMULTI: 1458 return ether_delmulti(ifreq_getaddr(cmd, ifr), ec); 1459 case SIOCSIFMEDIA: 1460 case SIOCGIFMEDIA: 1461 if (ec->ec_mii == NULL) 1462 return ENOTTY; 1463 return ifmedia_ioctl(ifp, ifr, &ec->ec_mii->mii_media, cmd); 1464 case SIOCALIFADDR: 1465 sdl = satocsdl(sstocsa(&iflr->addr)); 1466 if (sdl->sdl_family != AF_LINK) 1467 ; 1468 else if (ETHER_IS_MULTICAST(CLLADDR(sdl))) 1469 return EINVAL; 1470 else if (memcmp(zero, CLLADDR(sdl), sizeof(zero)) == 0) 1471 return EINVAL; 1472 /*FALLTHROUGH*/ 1473 default: 1474 return ifioctl_common(ifp, cmd, data); 1475 } 1476 return 0; 1477 } 1478 1479 static int 1480 ether_multicast_sysctl(SYSCTLFN_ARGS) 1481 { 1482 struct ether_multi *enm; 1483 struct ether_multi_sysctl addr; 1484 struct ifnet *ifp; 1485 struct ethercom *ec; 1486 int error; 1487 size_t written; 1488 1489 if (namelen != 1) 1490 return EINVAL; 1491 1492 ifp = if_byindex(name[0]); 1493 if (ifp == NULL) 1494 return ENODEV; 1495 if (ifp->if_type != IFT_ETHER) { 1496 *oldlenp = 0; 1497 return 0; 1498 } 1499 ec = (struct ethercom *)ifp; 1500 1501 if (oldp == NULL) { 1502 *oldlenp = ec->ec_multicnt * sizeof(addr); 1503 return 0; 1504 } 1505 1506 memset(&addr, 0, sizeof(addr)); 1507 error = 0; 1508 written = 0; 1509 1510 LIST_FOREACH(enm, &ec->ec_multiaddrs, enm_list) { 1511 if (written + sizeof(addr) > *oldlenp) 1512 break; 1513 addr.enm_refcount = enm->enm_refcount; 1514 memcpy(addr.enm_addrlo, enm->enm_addrlo, ETHER_ADDR_LEN); 1515 memcpy(addr.enm_addrhi, enm->enm_addrhi, ETHER_ADDR_LEN); 1516 error = sysctl_copyout(l, &addr, oldp, sizeof(addr)); 1517 if (error) 1518 break; 1519 written += sizeof(addr); 1520 oldp = (char *)oldp + sizeof(addr); 1521 } 1522 1523 *oldlenp = written; 1524 return error; 1525 } 1526 1527 SYSCTL_SETUP(sysctl_net_ether_setup, "sysctl net.ether subtree setup") 1528 { 1529 const struct sysctlnode *rnode = NULL; 1530 1531 sysctl_createv(clog, 0, NULL, &rnode, 1532 CTLFLAG_PERMANENT, 1533 CTLTYPE_NODE, "ether", 1534 SYSCTL_DESCR("Ethernet-specific information"), 1535 NULL, 0, NULL, 0, 1536 CTL_NET, CTL_CREATE, CTL_EOL); 1537 1538 sysctl_createv(clog, 0, &rnode, NULL, 1539 CTLFLAG_PERMANENT, 1540 CTLTYPE_NODE, "multicast", 1541 SYSCTL_DESCR("multicast addresses"), 1542 ether_multicast_sysctl, 0, NULL, 0, 1543 CTL_CREATE, CTL_EOL); 1544 } 1545 1546 void 1547 etherinit(void) 1548 { 1549 mutex_init(&bigpktpps_lock, MUTEX_DEFAULT, IPL_NET); 1550 } 1551