if_ethersubr.c revision 1.204
1 /* $NetBSD: if_ethersubr.c,v 1.204 2014/08/10 16:44:36 tls 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 1.204 2014/08/10 16:44:36 tls 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 "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 97 #include <net/if.h> 98 #include <net/netisr.h> 99 #include <net/route.h> 100 #include <net/if_llc.h> 101 #include <net/if_dl.h> 102 #include <net/if_types.h> 103 104 #include <net/if_media.h> 105 #include <dev/mii/mii.h> 106 #include <dev/mii/miivar.h> 107 108 #if NARP == 0 109 /* 110 * XXX there should really be a way to issue this warning from within config(8) 111 */ 112 #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. 113 #endif 114 115 #include <net/bpf.h> 116 117 #include <net/if_ether.h> 118 #include <net/if_vlanvar.h> 119 120 #if NPPPOE > 0 121 #include <net/if_pppoe.h> 122 #endif 123 124 #if NAGR > 0 125 #include <net/agr/ieee8023_slowprotocols.h> /* XXX */ 126 #include <net/agr/ieee8023ad.h> 127 #include <net/agr/if_agrvar.h> 128 #endif 129 130 #if NBRIDGE > 0 131 #include <net/if_bridgevar.h> 132 #endif 133 134 #include <netinet/in.h> 135 #ifdef INET 136 #include <netinet/in_var.h> 137 #endif 138 #include <netinet/if_inarp.h> 139 140 #ifdef INET6 141 #ifndef INET 142 #include <netinet/in.h> 143 #endif 144 #include <netinet6/in6_var.h> 145 #include <netinet6/nd6.h> 146 #endif 147 148 149 #include "carp.h" 150 #if NCARP > 0 151 #include <netinet/ip_carp.h> 152 #endif 153 154 #ifdef IPX 155 #include <netipx/ipx.h> 156 #include <netipx/ipx_if.h> 157 #endif 158 159 #ifdef NETATALK 160 #include <netatalk/at.h> 161 #include <netatalk/at_var.h> 162 #include <netatalk/at_extern.h> 163 164 #define llc_snap_org_code llc_un.type_snap.org_code 165 #define llc_snap_ether_type llc_un.type_snap.ether_type 166 167 extern u_char at_org_code[3]; 168 extern u_char aarp_org_code[3]; 169 #endif /* NETATALK */ 170 171 #ifdef MPLS 172 #include <netmpls/mpls.h> 173 #include <netmpls/mpls_var.h> 174 #endif 175 176 static struct timeval bigpktppslim_last; 177 static int bigpktppslim = 2; /* XXX */ 178 static int bigpktpps_count; 179 static kmutex_t bigpktpps_lock __cacheline_aligned; 180 181 182 const uint8_t etherbroadcastaddr[ETHER_ADDR_LEN] = 183 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 184 const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] = 185 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 }; 186 #define senderr(e) { error = (e); goto bad;} 187 188 static int ether_output(struct ifnet *, struct mbuf *, 189 const struct sockaddr *, struct rtentry *); 190 191 /* 192 * Ethernet output routine. 193 * Encapsulate a packet of type family for the local net. 194 * Assumes that ifp is actually pointer to ethercom structure. 195 */ 196 static int 197 ether_output(struct ifnet * const ifp0, struct mbuf * const m0, 198 const struct sockaddr * const dst, 199 struct rtentry *rt0) 200 { 201 uint16_t etype = 0; 202 int error = 0, hdrcmplt = 0; 203 uint8_t esrc[6], edst[6]; 204 struct mbuf *m = m0; 205 struct rtentry *rt; 206 struct mbuf *mcopy = NULL; 207 struct ether_header *eh; 208 struct ifnet *ifp = ifp0; 209 ALTQ_DECL(struct altq_pktattr pktattr;) 210 #ifdef INET 211 struct arphdr *ah; 212 #endif /* INET */ 213 #ifdef NETATALK 214 struct at_ifaddr *aa; 215 #endif /* NETATALK */ 216 217 KASSERT(KERNEL_LOCKED_P()); 218 219 #ifdef MBUFTRACE 220 m_claimm(m, ifp->if_mowner); 221 #endif 222 223 #if NCARP > 0 224 if (ifp->if_type == IFT_CARP) { 225 struct ifaddr *ifa; 226 227 /* loop back if this is going to the carp interface */ 228 if (dst != NULL && ifp0->if_link_state == LINK_STATE_UP && 229 (ifa = ifa_ifwithaddr(dst)) != NULL && 230 ifa->ifa_ifp == ifp0) 231 return looutput(ifp0, m, dst, rt0); 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 if ((rt = rt0) != NULL) { 245 if ((rt->rt_flags & RTF_UP) == 0) { 246 if ((rt0 = rt = rtalloc1(dst, 1)) != NULL) { 247 rt->rt_refcnt--; 248 if (rt->rt_ifp != ifp) 249 return (*rt->rt_ifp->if_output) 250 (ifp, m0, dst, rt); 251 } else 252 senderr(EHOSTUNREACH); 253 } 254 if ((rt->rt_flags & RTF_GATEWAY) && dst->sa_family != AF_NS) { 255 if (rt->rt_gwroute == NULL) 256 goto lookup; 257 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 258 rtfree(rt); rt = rt0; 259 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1); 260 if ((rt = rt->rt_gwroute) == NULL) 261 senderr(EHOSTUNREACH); 262 /* the "G" test below also prevents rt == rt0 */ 263 if ((rt->rt_flags & RTF_GATEWAY) || 264 (rt->rt_ifp != ifp)) { 265 rt->rt_refcnt--; 266 rt0->rt_gwroute = NULL; 267 senderr(EHOSTUNREACH); 268 } 269 } 270 } 271 if (rt->rt_flags & RTF_REJECT) 272 if (rt->rt_rmx.rmx_expire == 0 || 273 (u_long) time_second < rt->rt_rmx.rmx_expire) 274 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 275 } 276 277 switch (dst->sa_family) { 278 279 #ifdef INET 280 case AF_INET: 281 if (m->m_flags & M_BCAST) 282 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 283 else if (m->m_flags & M_MCAST) 284 ETHER_MAP_IP_MULTICAST(&satocsin(dst)->sin_addr, edst); 285 else if (!arpresolve(ifp, rt, m, dst, edst)) 286 return (0); /* if not yet resolved */ 287 /* If broadcasting on a simplex interface, loopback a copy */ 288 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 289 mcopy = m_copy(m, 0, (int)M_COPYALL); 290 etype = htons(ETHERTYPE_IP); 291 break; 292 293 case AF_ARP: 294 ah = mtod(m, struct arphdr *); 295 if (m->m_flags & M_BCAST) 296 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 297 else { 298 void *tha = ar_tha(ah); 299 300 if (tha == NULL) { 301 /* fake with ARPHDR_IEEE1394 */ 302 return 0; 303 } 304 memcpy(edst, tha, sizeof(edst)); 305 } 306 307 ah->ar_hrd = htons(ARPHRD_ETHER); 308 309 switch (ntohs(ah->ar_op)) { 310 case ARPOP_REVREQUEST: 311 case ARPOP_REVREPLY: 312 etype = htons(ETHERTYPE_REVARP); 313 break; 314 315 case ARPOP_REQUEST: 316 case ARPOP_REPLY: 317 default: 318 etype = htons(ETHERTYPE_ARP); 319 } 320 321 break; 322 #endif 323 #ifdef INET6 324 case AF_INET6: 325 if (!nd6_storelladdr(ifp, rt, m, dst, edst, sizeof(edst))){ 326 /* something bad happened */ 327 return (0); 328 } 329 etype = htons(ETHERTYPE_IPV6); 330 break; 331 #endif 332 #ifdef NETATALK 333 case AF_APPLETALK: 334 if (!aarpresolve(ifp, m, (const struct sockaddr_at *)dst, edst)) { 335 #ifdef NETATALKDEBUG 336 printf("aarpresolv failed\n"); 337 #endif /* NETATALKDEBUG */ 338 return (0); 339 } 340 /* 341 * ifaddr is the first thing in at_ifaddr 342 */ 343 aa = (struct at_ifaddr *) at_ifawithnet( 344 (const struct sockaddr_at *)dst, ifp); 345 if (aa == NULL) 346 goto bad; 347 348 /* 349 * In the phase 2 case, we need to prepend an mbuf for the 350 * llc header. Since we must preserve the value of m, 351 * which is passed to us by value, we m_copy() the first 352 * mbuf, and use it for our llc header. 353 */ 354 if (aa->aa_flags & AFA_PHASE2) { 355 struct llc llc; 356 357 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 358 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 359 llc.llc_control = LLC_UI; 360 memcpy(llc.llc_snap_org_code, at_org_code, 361 sizeof(llc.llc_snap_org_code)); 362 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 363 memcpy(mtod(m, void *), &llc, sizeof(struct llc)); 364 } else { 365 etype = htons(ETHERTYPE_ATALK); 366 } 367 break; 368 #endif /* NETATALK */ 369 #ifdef IPX 370 case AF_IPX: 371 etype = htons(ETHERTYPE_IPX); 372 memcpy(edst, 373 &(((const struct sockaddr_ipx *)dst)->sipx_addr.x_host), 374 sizeof(edst)); 375 /* If broadcasting on a simplex interface, loopback a copy */ 376 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 377 mcopy = m_copy(m, 0, (int)M_COPYALL); 378 break; 379 #endif 380 case pseudo_AF_HDRCMPLT: 381 hdrcmplt = 1; 382 memcpy(esrc, 383 ((const struct ether_header *)dst->sa_data)->ether_shost, 384 sizeof(esrc)); 385 /* FALLTHROUGH */ 386 387 case AF_UNSPEC: 388 memcpy(edst, 389 ((const struct ether_header *)dst->sa_data)->ether_dhost, 390 sizeof(edst)); 391 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 392 etype = ((const struct ether_header *)dst->sa_data)->ether_type; 393 break; 394 395 default: 396 printf("%s: can't handle af%d\n", ifp->if_xname, 397 dst->sa_family); 398 senderr(EAFNOSUPPORT); 399 } 400 401 #ifdef MPLS 402 if (rt0 != NULL && rt_gettag(rt0) != NULL && 403 rt_gettag(rt0)->sa_family == AF_MPLS && 404 (m->m_flags & (M_MCAST | M_BCAST)) == 0) { 405 union mpls_shim msh; 406 msh.s_addr = MPLS_GETSADDR(rt0); 407 if (msh.shim.label != MPLS_LABEL_IMPLNULL) 408 etype = htons(ETHERTYPE_MPLS); 409 } 410 #endif 411 412 if (mcopy) 413 (void)looutput(ifp, mcopy, dst, rt); 414 415 /* If no ether type is set, this must be a 802.2 formatted packet. 416 */ 417 if (etype == 0) 418 etype = htons(m->m_pkthdr.len); 419 /* 420 * Add local net header. If no space in first mbuf, 421 * allocate another. 422 */ 423 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 424 if (m == 0) 425 senderr(ENOBUFS); 426 eh = mtod(m, struct ether_header *); 427 /* Note: etype is already in network byte order. */ 428 (void)memcpy(&eh->ether_type, &etype, sizeof(eh->ether_type)); 429 memcpy(eh->ether_dhost, edst, sizeof(edst)); 430 if (hdrcmplt) 431 memcpy(eh->ether_shost, esrc, sizeof(eh->ether_shost)); 432 else 433 memcpy(eh->ether_shost, CLLADDR(ifp->if_sadl), 434 sizeof(eh->ether_shost)); 435 436 #if NCARP > 0 437 if (ifp0 != ifp && ifp0->if_type == IFT_CARP) { 438 memcpy(eh->ether_shost, CLLADDR(ifp0->if_sadl), 439 sizeof(eh->ether_shost)); 440 } 441 #endif /* NCARP > 0 */ 442 443 if ((error = pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 444 return (error); 445 if (m == NULL) 446 return (0); 447 448 #if NBRIDGE > 0 449 /* 450 * Bridges require special output handling. 451 */ 452 if (ifp->if_bridge) 453 return (bridge_output(ifp, m, NULL, NULL)); 454 #endif 455 456 #if NCARP > 0 457 if (ifp != ifp0) 458 ifp0->if_obytes += m->m_pkthdr.len + ETHER_HDR_LEN; 459 #endif /* NCARP > 0 */ 460 461 #ifdef ALTQ 462 /* 463 * If ALTQ is enabled on the parent interface, do 464 * classification; the queueing discipline might not 465 * require classification, but might require the 466 * address family/header pointer in the pktattr. 467 */ 468 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 469 altq_etherclassify(&ifp->if_snd, m, &pktattr); 470 #endif 471 return ifq_enqueue(ifp, m ALTQ_COMMA ALTQ_DECL(&pktattr)); 472 473 bad: 474 if (m) 475 m_freem(m); 476 return (error); 477 } 478 479 #ifdef ALTQ 480 /* 481 * This routine is a slight hack to allow a packet to be classified 482 * if the Ethernet headers are present. It will go away when ALTQ's 483 * classification engine understands link headers. 484 */ 485 void 486 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m, 487 struct altq_pktattr *pktattr) 488 { 489 struct ether_header *eh; 490 uint16_t ether_type; 491 int hlen, af, hdrsize; 492 void *hdr; 493 494 hlen = ETHER_HDR_LEN; 495 eh = mtod(m, struct ether_header *); 496 497 ether_type = htons(eh->ether_type); 498 499 if (ether_type < ETHERMTU) { 500 /* LLC/SNAP */ 501 struct llc *llc = (struct llc *)(eh + 1); 502 hlen += 8; 503 504 if (m->m_len < hlen || 505 llc->llc_dsap != LLC_SNAP_LSAP || 506 llc->llc_ssap != LLC_SNAP_LSAP || 507 llc->llc_control != LLC_UI) { 508 /* Not SNAP. */ 509 goto bad; 510 } 511 512 ether_type = htons(llc->llc_un.type_snap.ether_type); 513 } 514 515 switch (ether_type) { 516 case ETHERTYPE_IP: 517 af = AF_INET; 518 hdrsize = 20; /* sizeof(struct ip) */ 519 break; 520 521 case ETHERTYPE_IPV6: 522 af = AF_INET6; 523 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 524 break; 525 526 default: 527 af = AF_UNSPEC; 528 hdrsize = 0; 529 break; 530 } 531 532 while (m->m_len <= hlen) { 533 hlen -= m->m_len; 534 m = m->m_next; 535 } 536 if (m->m_len < (hlen + hdrsize)) { 537 /* 538 * protocol header not in a single mbuf. 539 * We can't cope with this situation right 540 * now (but it shouldn't ever happen, really, anyhow). 541 */ 542 #ifdef DEBUG 543 printf("altq_etherclassify: headers span multiple mbufs: " 544 "%d < %d\n", m->m_len, (hlen + hdrsize)); 545 #endif 546 goto bad; 547 } 548 549 m->m_data += hlen; 550 m->m_len -= hlen; 551 552 hdr = mtod(m, void *); 553 554 if (ALTQ_NEEDS_CLASSIFY(ifq)) 555 pktattr->pattr_class = 556 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 557 pktattr->pattr_af = af; 558 pktattr->pattr_hdr = hdr; 559 560 m->m_data -= hlen; 561 m->m_len += hlen; 562 563 return; 564 565 bad: 566 pktattr->pattr_class = NULL; 567 pktattr->pattr_hdr = NULL; 568 pktattr->pattr_af = AF_UNSPEC; 569 } 570 #endif /* ALTQ */ 571 572 /* 573 * Process a received Ethernet packet; 574 * the packet is in the mbuf chain m with 575 * the ether header. 576 */ 577 void 578 ether_input(struct ifnet *ifp, struct mbuf *m) 579 { 580 struct ethercom *ec = (struct ethercom *) ifp; 581 pktqueue_t *pktq = NULL; 582 struct ifqueue *inq = NULL; 583 uint16_t etype; 584 struct ether_header *eh; 585 size_t ehlen; 586 static int earlypkts; 587 int isr = 0; 588 #if defined (LLC) || defined(NETATALK) 589 struct llc *l; 590 #endif 591 592 if ((ifp->if_flags & IFF_UP) == 0) { 593 m_freem(m); 594 return; 595 } 596 597 #ifdef MBUFTRACE 598 m_claimm(m, &ec->ec_rx_mowner); 599 #endif 600 eh = mtod(m, struct ether_header *); 601 etype = ntohs(eh->ether_type); 602 ehlen = sizeof(*eh); 603 604 if(__predict_false(earlypkts < 100 || !rnd_initial_entropy)) { 605 rnd_add_data(NULL, eh, ehlen, 0); 606 earlypkts++; 607 } 608 609 /* 610 * Determine if the packet is within its size limits. 611 */ 612 if (etype != ETHERTYPE_MPLS && m->m_pkthdr.len > 613 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 614 mutex_enter(&bigpktpps_lock); 615 if (ppsratecheck(&bigpktppslim_last, &bigpktpps_count, 616 bigpktppslim)) { 617 printf("%s: discarding oversize frame (len=%d)\n", 618 ifp->if_xname, m->m_pkthdr.len); 619 } 620 mutex_exit(&bigpktpps_lock); 621 m_freem(m); 622 return; 623 } 624 625 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 626 /* 627 * If this is not a simplex interface, drop the packet 628 * if it came from us. 629 */ 630 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 631 memcmp(CLLADDR(ifp->if_sadl), eh->ether_shost, 632 ETHER_ADDR_LEN) == 0) { 633 m_freem(m); 634 return; 635 } 636 637 if (memcmp(etherbroadcastaddr, 638 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 639 m->m_flags |= M_BCAST; 640 else 641 m->m_flags |= M_MCAST; 642 ifp->if_imcasts++; 643 } 644 645 /* If the CRC is still on the packet, trim it off. */ 646 if (m->m_flags & M_HASFCS) { 647 m_adj(m, -ETHER_CRC_LEN); 648 m->m_flags &= ~M_HASFCS; 649 } 650 651 ifp->if_ibytes += m->m_pkthdr.len; 652 653 #if NCARP > 0 654 if (__predict_false(ifp->if_carp && ifp->if_type != IFT_CARP)) { 655 /* 656 * clear M_PROMISC, in case the packets comes from a 657 * vlan 658 */ 659 m->m_flags &= ~M_PROMISC; 660 if (carp_input(m, (uint8_t *)&eh->ether_shost, 661 (uint8_t *)&eh->ether_dhost, eh->ether_type) == 0) 662 return; 663 } 664 #endif /* NCARP > 0 */ 665 if ((m->m_flags & (M_BCAST|M_MCAST|M_PROMISC)) == 0 && 666 (ifp->if_flags & IFF_PROMISC) != 0 && 667 memcmp(CLLADDR(ifp->if_sadl), eh->ether_dhost, 668 ETHER_ADDR_LEN) != 0) { 669 m->m_flags |= M_PROMISC; 670 } 671 672 if ((m->m_flags & M_PROMISC) == 0) { 673 if (pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 674 return; 675 if (m == NULL) 676 return; 677 678 eh = mtod(m, struct ether_header *); 679 etype = ntohs(eh->ether_type); 680 ehlen = sizeof(*eh); 681 } 682 683 #if NAGR > 0 684 if (ifp->if_agrprivate && 685 __predict_true(etype != ETHERTYPE_SLOWPROTOCOLS)) { 686 m->m_flags &= ~M_PROMISC; 687 agr_input(ifp, m); 688 return; 689 } 690 #endif /* NAGR > 0 */ 691 692 /* 693 * If VLANs are configured on the interface, check to 694 * see if the device performed the decapsulation and 695 * provided us with the tag. 696 */ 697 if (ec->ec_nvlans && m_tag_find(m, PACKET_TAG_VLAN, NULL) != NULL) { 698 #if NVLAN > 0 699 /* 700 * vlan_input() will either recursively call ether_input() 701 * or drop the packet. 702 */ 703 vlan_input(ifp, m); 704 #else 705 m_freem(m); 706 #endif 707 return; 708 } 709 710 /* 711 * Handle protocols that expect to have the Ethernet header 712 * (and possibly FCS) intact. 713 */ 714 switch (etype) { 715 case ETHERTYPE_VLAN: { 716 struct ether_vlan_header *evl = (void *)eh; 717 /* 718 * If there is a tag of 0, then the VLAN header was probably 719 * just being used to store the priority. Extract the ether 720 * type, and if IP or IPV6, let them deal with it. 721 */ 722 if (m->m_len <= sizeof(*evl) 723 && EVL_VLANOFTAG(evl->evl_tag) == 0) { 724 etype = ntohs(evl->evl_proto); 725 ehlen = sizeof(*evl); 726 if ((m->m_flags & M_PROMISC) == 0 727 && (etype == ETHERTYPE_IP 728 || etype == ETHERTYPE_IPV6)) 729 break; 730 } 731 #if NVLAN > 0 732 /* 733 * vlan_input() will either recursively call ether_input() 734 * or drop the packet. 735 */ 736 if (((struct ethercom *)ifp)->ec_nvlans != 0) 737 vlan_input(ifp, m); 738 else 739 #endif /* NVLAN > 0 */ 740 m_freem(m); 741 return; 742 } 743 #if NPPPOE > 0 744 case ETHERTYPE_PPPOEDISC: 745 case ETHERTYPE_PPPOE: 746 if (m->m_flags & M_PROMISC) { 747 m_freem(m); 748 return; 749 } 750 #ifndef PPPOE_SERVER 751 if (m->m_flags & (M_MCAST | M_BCAST)) { 752 m_freem(m); 753 return; 754 } 755 #endif 756 757 if (etype == ETHERTYPE_PPPOEDISC) 758 inq = &ppoediscinq; 759 else 760 inq = &ppoeinq; 761 if (IF_QFULL(inq)) { 762 IF_DROP(inq); 763 m_freem(m); 764 } else { 765 IF_ENQUEUE(inq, m); 766 softint_schedule(pppoe_softintr); 767 } 768 return; 769 #endif /* NPPPOE > 0 */ 770 case ETHERTYPE_SLOWPROTOCOLS: { 771 uint8_t subtype; 772 773 #if defined(DIAGNOSTIC) 774 if (m->m_pkthdr.len < sizeof(*eh) + sizeof(subtype)) { 775 panic("ether_input: too short slow protocol packet"); 776 } 777 #endif 778 m_copydata(m, sizeof(*eh), sizeof(subtype), &subtype); 779 switch (subtype) { 780 #if NAGR > 0 781 case SLOWPROTOCOLS_SUBTYPE_LACP: 782 if (ifp->if_agrprivate) { 783 ieee8023ad_lacp_input(ifp, m); 784 return; 785 } 786 break; 787 788 case SLOWPROTOCOLS_SUBTYPE_MARKER: 789 if (ifp->if_agrprivate) { 790 ieee8023ad_marker_input(ifp, m); 791 return; 792 } 793 break; 794 #endif /* NAGR > 0 */ 795 default: 796 if (subtype == 0 || subtype > 10) { 797 /* illegal value */ 798 m_freem(m); 799 return; 800 } 801 /* unknown subtype */ 802 break; 803 } 804 /* FALLTHROUGH */ 805 } 806 default: 807 if (m->m_flags & M_PROMISC) { 808 m_freem(m); 809 return; 810 } 811 } 812 813 /* If the CRC is still on the packet, trim it off. */ 814 if (m->m_flags & M_HASFCS) { 815 m_adj(m, -ETHER_CRC_LEN); 816 m->m_flags &= ~M_HASFCS; 817 } 818 819 if (etype > ETHERMTU + sizeof (struct ether_header)) { 820 /* Strip off the Ethernet header. */ 821 m_adj(m, ehlen); 822 823 switch (etype) { 824 #ifdef INET 825 case ETHERTYPE_IP: 826 #ifdef GATEWAY 827 if (ipflow_fastforward(m)) 828 return; 829 #endif 830 pktq = ip_pktq; 831 break; 832 833 case ETHERTYPE_ARP: 834 isr = NETISR_ARP; 835 inq = &arpintrq; 836 break; 837 838 case ETHERTYPE_REVARP: 839 revarpinput(m); /* XXX queue? */ 840 return; 841 #endif 842 #ifdef INET6 843 case ETHERTYPE_IPV6: 844 if (__predict_false(!in6_present)) { 845 m_freem(m); 846 return; 847 } 848 #ifdef GATEWAY 849 if (ip6flow_fastforward(&m)) 850 return; 851 #endif 852 pktq = ip6_pktq; 853 break; 854 #endif 855 #ifdef IPX 856 case ETHERTYPE_IPX: 857 isr = NETISR_IPX; 858 inq = &ipxintrq; 859 break; 860 #endif 861 #ifdef NETATALK 862 case ETHERTYPE_ATALK: 863 isr = NETISR_ATALK; 864 inq = &atintrq1; 865 break; 866 case ETHERTYPE_AARP: 867 /* probably this should be done with a NETISR as well */ 868 aarpinput(ifp, m); /* XXX */ 869 return; 870 #endif /* NETATALK */ 871 #ifdef MPLS 872 case ETHERTYPE_MPLS: 873 isr = NETISR_MPLS; 874 inq = &mplsintrq; 875 break; 876 #endif 877 default: 878 m_freem(m); 879 return; 880 } 881 } else { 882 #if defined (LLC) || defined (NETATALK) 883 l = (struct llc *)(eh+1); 884 switch (l->llc_dsap) { 885 #ifdef NETATALK 886 case LLC_SNAP_LSAP: 887 switch (l->llc_control) { 888 case LLC_UI: 889 if (l->llc_ssap != LLC_SNAP_LSAP) { 890 goto dropanyway; 891 } 892 893 if (memcmp(&(l->llc_snap_org_code)[0], 894 at_org_code, sizeof(at_org_code)) == 0 && 895 ntohs(l->llc_snap_ether_type) == 896 ETHERTYPE_ATALK) { 897 inq = &atintrq2; 898 m_adj(m, sizeof(struct ether_header) 899 + sizeof(struct llc)); 900 isr = NETISR_ATALK; 901 break; 902 } 903 904 if (memcmp(&(l->llc_snap_org_code)[0], 905 aarp_org_code, 906 sizeof(aarp_org_code)) == 0 && 907 ntohs(l->llc_snap_ether_type) == 908 ETHERTYPE_AARP) { 909 m_adj( m, sizeof(struct ether_header) 910 + sizeof(struct llc)); 911 aarpinput(ifp, m); /* XXX */ 912 return; 913 } 914 915 default: 916 goto dropanyway; 917 } 918 break; 919 dropanyway: 920 #endif 921 default: 922 m_freem(m); 923 return; 924 } 925 #else /* ISO || LLC || NETATALK*/ 926 m_freem(m); 927 return; 928 #endif /* ISO || LLC || NETATALK*/ 929 } 930 931 if (__predict_true(pktq)) { 932 const uint32_t h = pktq_rps_hash(m); 933 if (__predict_false(!pktq_enqueue(pktq, m, h))) { 934 m_freem(m); 935 } 936 return; 937 } 938 939 if (__predict_false(!inq)) { 940 /* Should not happen. */ 941 m_freem(m); 942 return; 943 } 944 if (IF_QFULL(inq)) { 945 IF_DROP(inq); 946 m_freem(m); 947 } else { 948 IF_ENQUEUE(inq, m); 949 schednetisr(isr); 950 } 951 } 952 953 /* 954 * Convert Ethernet address to printable (loggable) representation. 955 */ 956 char * 957 ether_sprintf(const u_char *ap) 958 { 959 static char etherbuf[3 * ETHER_ADDR_LEN]; 960 return ether_snprintf(etherbuf, sizeof(etherbuf), ap); 961 } 962 963 char * 964 ether_snprintf(char *buf, size_t len, const u_char *ap) 965 { 966 char *cp = buf; 967 size_t i; 968 969 for (i = 0; i < len / 3; i++) { 970 *cp++ = hexdigits[*ap >> 4]; 971 *cp++ = hexdigits[*ap++ & 0xf]; 972 *cp++ = ':'; 973 } 974 *--cp = '\0'; 975 return buf; 976 } 977 978 /* 979 * Perform common duties while attaching to interface list 980 */ 981 void 982 ether_ifattach(struct ifnet *ifp, const uint8_t *lla) 983 { 984 struct ethercom *ec = (struct ethercom *)ifp; 985 986 ifp->if_type = IFT_ETHER; 987 ifp->if_hdrlen = ETHER_HDR_LEN; 988 ifp->if_dlt = DLT_EN10MB; 989 ifp->if_mtu = ETHERMTU; 990 ifp->if_output = ether_output; 991 ifp->if_input = ether_input; 992 if (ifp->if_baudrate == 0) 993 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 994 995 if_set_sadl(ifp, lla, ETHER_ADDR_LEN, !ETHER_IS_LOCAL(lla)); 996 997 LIST_INIT(&ec->ec_multiaddrs); 998 ifp->if_broadcastaddr = etherbroadcastaddr; 999 bpf_attach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 1000 #ifdef MBUFTRACE 1001 strlcpy(ec->ec_tx_mowner.mo_name, ifp->if_xname, 1002 sizeof(ec->ec_tx_mowner.mo_name)); 1003 strlcpy(ec->ec_tx_mowner.mo_descr, "tx", 1004 sizeof(ec->ec_tx_mowner.mo_descr)); 1005 strlcpy(ec->ec_rx_mowner.mo_name, ifp->if_xname, 1006 sizeof(ec->ec_rx_mowner.mo_name)); 1007 strlcpy(ec->ec_rx_mowner.mo_descr, "rx", 1008 sizeof(ec->ec_rx_mowner.mo_descr)); 1009 MOWNER_ATTACH(&ec->ec_tx_mowner); 1010 MOWNER_ATTACH(&ec->ec_rx_mowner); 1011 ifp->if_mowner = &ec->ec_tx_mowner; 1012 #endif 1013 } 1014 1015 void 1016 ether_ifdetach(struct ifnet *ifp) 1017 { 1018 struct ethercom *ec = (void *) ifp; 1019 struct ether_multi *enm; 1020 int s; 1021 1022 /* 1023 * Prevent further calls to ioctl (for example turning off 1024 * promiscuous mode from the bridge code), which eventually can 1025 * call if_init() which can cause panics because the interface 1026 * is in the process of being detached. Return device not configured 1027 * instead. 1028 */ 1029 ifp->if_ioctl = (int (*)(struct ifnet *, u_long, void *))enxio; 1030 1031 #if NBRIDGE > 0 1032 if (ifp->if_bridge) 1033 bridge_ifdetach(ifp); 1034 #endif 1035 1036 bpf_detach(ifp); 1037 1038 #if NVLAN > 0 1039 if (ec->ec_nvlans) 1040 vlan_ifdetach(ifp); 1041 #endif 1042 1043 s = splnet(); 1044 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1045 LIST_REMOVE(enm, enm_list); 1046 free(enm, M_IFMADDR); 1047 ec->ec_multicnt--; 1048 } 1049 splx(s); 1050 1051 #if 0 /* done in if_detach() */ 1052 if_free_sadl(ifp); 1053 #endif 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
Indexes created Mon Sep 22 13:09:51 GMT 2025