if_ethersubr.c revision 1.206
1 /* $NetBSD: if_ethersubr.c,v 1.206 2015/04/03 07:55:18 ozaki-r Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1982, 1989, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)if_ethersubr.c 8.2 (Berkeley) 4/4/96 61 */ 62 63 #include <sys/cdefs.h> 64 __KERNEL_RCSID(0, "$NetBSD: if_ethersubr.c,v 1.206 2015/04/03 07:55:18 ozaki-r 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 98 #include <net/if.h> 99 #include <net/netisr.h> 100 #include <net/route.h> 101 #include <net/if_llc.h> 102 #include <net/if_dl.h> 103 #include <net/if_types.h> 104 105 #include <net/if_media.h> 106 #include <dev/mii/mii.h> 107 #include <dev/mii/miivar.h> 108 109 #if NARP == 0 110 /* 111 * XXX there should really be a way to issue this warning from within config(8) 112 */ 113 #error You have included NETATALK or a pseudo-device in your configuration that depends on the presence of ethernet interfaces, but have no such interfaces configured. Check if you really need pseudo-device bridge, pppoe, vlan or options NETATALK. 114 #endif 115 116 #include <net/bpf.h> 117 118 #include <net/if_ether.h> 119 #include <net/if_vlanvar.h> 120 121 #if NPPPOE > 0 122 #include <net/if_pppoe.h> 123 #endif 124 125 #if NAGR > 0 126 #include <net/agr/ieee8023_slowprotocols.h> /* XXX */ 127 #include <net/agr/ieee8023ad.h> 128 #include <net/agr/if_agrvar.h> 129 #endif 130 131 #if NBRIDGE > 0 132 #include <net/if_bridgevar.h> 133 #endif 134 135 #include <netinet/in.h> 136 #ifdef INET 137 #include <netinet/in_var.h> 138 #endif 139 #include <netinet/if_inarp.h> 140 141 #ifdef INET6 142 #ifndef INET 143 #include <netinet/in.h> 144 #endif 145 #include <netinet6/in6_var.h> 146 #include <netinet6/nd6.h> 147 #endif 148 149 150 #include "carp.h" 151 #if NCARP > 0 152 #include <netinet/ip_carp.h> 153 #endif 154 155 #ifdef IPX 156 #include <netipx/ipx.h> 157 #include <netipx/ipx_if.h> 158 #endif 159 160 #ifdef NETATALK 161 #include <netatalk/at.h> 162 #include <netatalk/at_var.h> 163 #include <netatalk/at_extern.h> 164 165 #define llc_snap_org_code llc_un.type_snap.org_code 166 #define llc_snap_ether_type llc_un.type_snap.ether_type 167 168 extern u_char at_org_code[3]; 169 extern u_char aarp_org_code[3]; 170 #endif /* NETATALK */ 171 172 #ifdef MPLS 173 #include <netmpls/mpls.h> 174 #include <netmpls/mpls_var.h> 175 #endif 176 177 static struct timeval bigpktppslim_last; 178 static int bigpktppslim = 2; /* XXX */ 179 static int bigpktpps_count; 180 static kmutex_t bigpktpps_lock __cacheline_aligned; 181 182 183 const uint8_t etherbroadcastaddr[ETHER_ADDR_LEN] = 184 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 185 const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] = 186 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 }; 187 #define senderr(e) { error = (e); goto bad;} 188 189 static int ether_output(struct ifnet *, struct mbuf *, 190 const struct sockaddr *, struct rtentry *); 191 192 /* 193 * Ethernet output routine. 194 * Encapsulate a packet of type family for the local net. 195 * Assumes that ifp is actually pointer to ethercom structure. 196 */ 197 static int 198 ether_output(struct ifnet * const ifp0, struct mbuf * const m0, 199 const struct sockaddr * const dst, 200 struct rtentry *rt0) 201 { 202 uint16_t etype = 0; 203 int error = 0, hdrcmplt = 0; 204 uint8_t esrc[6], edst[6]; 205 struct mbuf *m = m0; 206 struct rtentry *rt; 207 struct mbuf *mcopy = NULL; 208 struct ether_header *eh; 209 struct ifnet *ifp = ifp0; 210 ALTQ_DECL(struct altq_pktattr pktattr;) 211 #ifdef INET 212 struct arphdr *ah; 213 #endif /* INET */ 214 #ifdef NETATALK 215 struct at_ifaddr *aa; 216 #endif /* NETATALK */ 217 218 #ifndef NET_MPSAFE 219 KASSERT(KERNEL_LOCKED_P()); 220 #endif 221 222 #ifdef MBUFTRACE 223 m_claimm(m, ifp->if_mowner); 224 #endif 225 226 #if NCARP > 0 227 if (ifp->if_type == IFT_CARP) { 228 struct ifaddr *ifa; 229 230 /* loop back if this is going to the carp interface */ 231 if (dst != NULL && ifp0->if_link_state == LINK_STATE_UP && 232 (ifa = ifa_ifwithaddr(dst)) != NULL && 233 ifa->ifa_ifp == ifp0) 234 return looutput(ifp0, m, dst, rt0); 235 236 ifp = ifp->if_carpdev; 237 /* ac = (struct arpcom *)ifp; */ 238 239 if ((ifp0->if_flags & (IFF_UP|IFF_RUNNING)) != 240 (IFF_UP|IFF_RUNNING)) 241 senderr(ENETDOWN); 242 } 243 #endif /* NCARP > 0 */ 244 245 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 246 senderr(ENETDOWN); 247 if ((rt = rt0) != NULL) { 248 if ((rt->rt_flags & RTF_UP) == 0) { 249 if ((rt0 = rt = rtalloc1(dst, 1)) != NULL) { 250 rt->rt_refcnt--; 251 if (rt->rt_ifp != ifp) 252 return (*rt->rt_ifp->if_output) 253 (ifp, m0, dst, rt); 254 } else 255 senderr(EHOSTUNREACH); 256 } 257 if ((rt->rt_flags & RTF_GATEWAY) && dst->sa_family != AF_NS) { 258 if (rt->rt_gwroute == NULL) 259 goto lookup; 260 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 261 rtfree(rt); rt = rt0; 262 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1); 263 if ((rt = rt->rt_gwroute) == NULL) 264 senderr(EHOSTUNREACH); 265 /* the "G" test below also prevents rt == rt0 */ 266 if ((rt->rt_flags & RTF_GATEWAY) || 267 (rt->rt_ifp != ifp)) { 268 rt->rt_refcnt--; 269 rt0->rt_gwroute = NULL; 270 senderr(EHOSTUNREACH); 271 } 272 } 273 } 274 if (rt->rt_flags & RTF_REJECT) 275 if (rt->rt_rmx.rmx_expire == 0 || 276 (u_long) time_second < rt->rt_rmx.rmx_expire) 277 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 278 } 279 280 switch (dst->sa_family) { 281 282 #ifdef INET 283 case AF_INET: 284 if (m->m_flags & M_BCAST) 285 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 286 else if (m->m_flags & M_MCAST) 287 ETHER_MAP_IP_MULTICAST(&satocsin(dst)->sin_addr, edst); 288 else if (!arpresolve(ifp, rt, m, dst, edst)) 289 return (0); /* if not yet resolved */ 290 /* If broadcasting on a simplex interface, loopback a copy */ 291 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 292 mcopy = m_copy(m, 0, (int)M_COPYALL); 293 etype = htons(ETHERTYPE_IP); 294 break; 295 296 case AF_ARP: 297 ah = mtod(m, struct arphdr *); 298 if (m->m_flags & M_BCAST) 299 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 300 else { 301 void *tha = ar_tha(ah); 302 303 if (tha == NULL) { 304 /* fake with ARPHDR_IEEE1394 */ 305 return 0; 306 } 307 memcpy(edst, tha, sizeof(edst)); 308 } 309 310 ah->ar_hrd = htons(ARPHRD_ETHER); 311 312 switch (ntohs(ah->ar_op)) { 313 case ARPOP_REVREQUEST: 314 case ARPOP_REVREPLY: 315 etype = htons(ETHERTYPE_REVARP); 316 break; 317 318 case ARPOP_REQUEST: 319 case ARPOP_REPLY: 320 default: 321 etype = htons(ETHERTYPE_ARP); 322 } 323 324 break; 325 #endif 326 #ifdef INET6 327 case AF_INET6: 328 if (!nd6_storelladdr(ifp, rt, m, dst, edst, sizeof(edst))){ 329 /* something bad happened */ 330 return (0); 331 } 332 etype = htons(ETHERTYPE_IPV6); 333 break; 334 #endif 335 #ifdef NETATALK 336 case AF_APPLETALK: 337 if (!aarpresolve(ifp, m, (const struct sockaddr_at *)dst, edst)) { 338 #ifdef NETATALKDEBUG 339 printf("aarpresolv failed\n"); 340 #endif /* NETATALKDEBUG */ 341 return (0); 342 } 343 /* 344 * ifaddr is the first thing in at_ifaddr 345 */ 346 aa = (struct at_ifaddr *) at_ifawithnet( 347 (const struct sockaddr_at *)dst, ifp); 348 if (aa == NULL) 349 goto bad; 350 351 /* 352 * In the phase 2 case, we need to prepend an mbuf for the 353 * llc header. Since we must preserve the value of m, 354 * which is passed to us by value, we m_copy() the first 355 * mbuf, and use it for our llc header. 356 */ 357 if (aa->aa_flags & AFA_PHASE2) { 358 struct llc llc; 359 360 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 361 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 362 llc.llc_control = LLC_UI; 363 memcpy(llc.llc_snap_org_code, at_org_code, 364 sizeof(llc.llc_snap_org_code)); 365 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 366 memcpy(mtod(m, void *), &llc, sizeof(struct llc)); 367 } else { 368 etype = htons(ETHERTYPE_ATALK); 369 } 370 break; 371 #endif /* NETATALK */ 372 #ifdef IPX 373 case AF_IPX: 374 etype = htons(ETHERTYPE_IPX); 375 memcpy(edst, 376 &(((const struct sockaddr_ipx *)dst)->sipx_addr.x_host), 377 sizeof(edst)); 378 /* If broadcasting on a simplex interface, loopback a copy */ 379 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 380 mcopy = m_copy(m, 0, (int)M_COPYALL); 381 break; 382 #endif 383 case pseudo_AF_HDRCMPLT: 384 hdrcmplt = 1; 385 memcpy(esrc, 386 ((const struct ether_header *)dst->sa_data)->ether_shost, 387 sizeof(esrc)); 388 /* FALLTHROUGH */ 389 390 case AF_UNSPEC: 391 memcpy(edst, 392 ((const struct ether_header *)dst->sa_data)->ether_dhost, 393 sizeof(edst)); 394 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 395 etype = ((const struct ether_header *)dst->sa_data)->ether_type; 396 break; 397 398 default: 399 printf("%s: can't handle af%d\n", ifp->if_xname, 400 dst->sa_family); 401 senderr(EAFNOSUPPORT); 402 } 403 404 #ifdef MPLS 405 if (rt0 != NULL && rt_gettag(rt0) != NULL && 406 rt_gettag(rt0)->sa_family == AF_MPLS && 407 (m->m_flags & (M_MCAST | M_BCAST)) == 0) { 408 union mpls_shim msh; 409 msh.s_addr = MPLS_GETSADDR(rt0); 410 if (msh.shim.label != MPLS_LABEL_IMPLNULL) 411 etype = htons(ETHERTYPE_MPLS); 412 } 413 #endif 414 415 if (mcopy) 416 (void)looutput(ifp, mcopy, dst, rt); 417 418 /* If no ether type is set, this must be a 802.2 formatted packet. 419 */ 420 if (etype == 0) 421 etype = htons(m->m_pkthdr.len); 422 /* 423 * Add local net header. If no space in first mbuf, 424 * allocate another. 425 */ 426 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 427 if (m == 0) 428 senderr(ENOBUFS); 429 eh = mtod(m, struct ether_header *); 430 /* Note: etype is already in network byte order. */ 431 (void)memcpy(&eh->ether_type, &etype, sizeof(eh->ether_type)); 432 memcpy(eh->ether_dhost, edst, sizeof(edst)); 433 if (hdrcmplt) 434 memcpy(eh->ether_shost, esrc, sizeof(eh->ether_shost)); 435 else 436 memcpy(eh->ether_shost, CLLADDR(ifp->if_sadl), 437 sizeof(eh->ether_shost)); 438 439 #if NCARP > 0 440 if (ifp0 != ifp && ifp0->if_type == IFT_CARP) { 441 memcpy(eh->ether_shost, CLLADDR(ifp0->if_sadl), 442 sizeof(eh->ether_shost)); 443 } 444 #endif /* NCARP > 0 */ 445 446 if ((error = pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 447 return (error); 448 if (m == NULL) 449 return (0); 450 451 #if NBRIDGE > 0 452 /* 453 * Bridges require special output handling. 454 */ 455 if (ifp->if_bridge) 456 return (bridge_output(ifp, m, NULL, NULL)); 457 #endif 458 459 #if NCARP > 0 460 if (ifp != ifp0) 461 ifp0->if_obytes += m->m_pkthdr.len + ETHER_HDR_LEN; 462 #endif /* NCARP > 0 */ 463 464 #ifdef ALTQ 465 /* 466 * If ALTQ is enabled on the parent interface, do 467 * classification; the queueing discipline might not 468 * require classification, but might require the 469 * address family/header pointer in the pktattr. 470 */ 471 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 472 altq_etherclassify(&ifp->if_snd, m, &pktattr); 473 #endif 474 return ifq_enqueue(ifp, m ALTQ_COMMA ALTQ_DECL(&pktattr)); 475 476 bad: 477 if (m) 478 m_freem(m); 479 return (error); 480 } 481 482 #ifdef ALTQ 483 /* 484 * This routine is a slight hack to allow a packet to be classified 485 * if the Ethernet headers are present. It will go away when ALTQ's 486 * classification engine understands link headers. 487 */ 488 void 489 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m, 490 struct altq_pktattr *pktattr) 491 { 492 struct ether_header *eh; 493 uint16_t ether_type; 494 int hlen, af, hdrsize; 495 void *hdr; 496 497 hlen = ETHER_HDR_LEN; 498 eh = mtod(m, struct ether_header *); 499 500 ether_type = htons(eh->ether_type); 501 502 if (ether_type < ETHERMTU) { 503 /* LLC/SNAP */ 504 struct llc *llc = (struct llc *)(eh + 1); 505 hlen += 8; 506 507 if (m->m_len < hlen || 508 llc->llc_dsap != LLC_SNAP_LSAP || 509 llc->llc_ssap != LLC_SNAP_LSAP || 510 llc->llc_control != LLC_UI) { 511 /* Not SNAP. */ 512 goto bad; 513 } 514 515 ether_type = htons(llc->llc_un.type_snap.ether_type); 516 } 517 518 switch (ether_type) { 519 case ETHERTYPE_IP: 520 af = AF_INET; 521 hdrsize = 20; /* sizeof(struct ip) */ 522 break; 523 524 case ETHERTYPE_IPV6: 525 af = AF_INET6; 526 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 527 break; 528 529 default: 530 af = AF_UNSPEC; 531 hdrsize = 0; 532 break; 533 } 534 535 while (m->m_len <= hlen) { 536 hlen -= m->m_len; 537 m = m->m_next; 538 } 539 if (m->m_len < (hlen + hdrsize)) { 540 /* 541 * protocol header not in a single mbuf. 542 * We can't cope with this situation right 543 * now (but it shouldn't ever happen, really, anyhow). 544 */ 545 #ifdef DEBUG 546 printf("altq_etherclassify: headers span multiple mbufs: " 547 "%d < %d\n", m->m_len, (hlen + hdrsize)); 548 #endif 549 goto bad; 550 } 551 552 m->m_data += hlen; 553 m->m_len -= hlen; 554 555 hdr = mtod(m, void *); 556 557 if (ALTQ_NEEDS_CLASSIFY(ifq)) 558 pktattr->pattr_class = 559 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 560 pktattr->pattr_af = af; 561 pktattr->pattr_hdr = hdr; 562 563 m->m_data -= hlen; 564 m->m_len += hlen; 565 566 return; 567 568 bad: 569 pktattr->pattr_class = NULL; 570 pktattr->pattr_hdr = NULL; 571 pktattr->pattr_af = AF_UNSPEC; 572 } 573 #endif /* ALTQ */ 574 575 /* 576 * Process a received Ethernet packet; 577 * the packet is in the mbuf chain m with 578 * the ether header. 579 */ 580 void 581 ether_input(struct ifnet *ifp, struct mbuf *m) 582 { 583 struct ethercom *ec = (struct ethercom *) ifp; 584 pktqueue_t *pktq = NULL; 585 struct ifqueue *inq = NULL; 586 uint16_t etype; 587 struct ether_header *eh; 588 size_t ehlen; 589 static int earlypkts; 590 int isr = 0; 591 #if defined (LLC) || defined(NETATALK) 592 struct llc *l; 593 #endif 594 595 if ((ifp->if_flags & IFF_UP) == 0) { 596 m_freem(m); 597 return; 598 } 599 600 #ifdef MBUFTRACE 601 m_claimm(m, &ec->ec_rx_mowner); 602 #endif 603 eh = mtod(m, struct ether_header *); 604 etype = ntohs(eh->ether_type); 605 ehlen = sizeof(*eh); 606 607 if(__predict_false(earlypkts < 100 || !rnd_initial_entropy)) { 608 rnd_add_data(NULL, eh, ehlen, 0); 609 earlypkts++; 610 } 611 612 /* 613 * Determine if the packet is within its size limits. 614 */ 615 if (etype != ETHERTYPE_MPLS && m->m_pkthdr.len > 616 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 617 mutex_enter(&bigpktpps_lock); 618 if (ppsratecheck(&bigpktppslim_last, &bigpktpps_count, 619 bigpktppslim)) { 620 printf("%s: discarding oversize frame (len=%d)\n", 621 ifp->if_xname, m->m_pkthdr.len); 622 } 623 mutex_exit(&bigpktpps_lock); 624 m_freem(m); 625 return; 626 } 627 628 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 629 /* 630 * If this is not a simplex interface, drop the packet 631 * if it came from us. 632 */ 633 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 634 memcmp(CLLADDR(ifp->if_sadl), eh->ether_shost, 635 ETHER_ADDR_LEN) == 0) { 636 m_freem(m); 637 return; 638 } 639 640 if (memcmp(etherbroadcastaddr, 641 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 642 m->m_flags |= M_BCAST; 643 else 644 m->m_flags |= M_MCAST; 645 ifp->if_imcasts++; 646 } 647 648 /* If the CRC is still on the packet, trim it off. */ 649 if (m->m_flags & M_HASFCS) { 650 m_adj(m, -ETHER_CRC_LEN); 651 m->m_flags &= ~M_HASFCS; 652 } 653 654 ifp->if_ibytes += m->m_pkthdr.len; 655 656 #if NCARP > 0 657 if (__predict_false(ifp->if_carp && ifp->if_type != IFT_CARP)) { 658 /* 659 * clear M_PROMISC, in case the packets comes from a 660 * vlan 661 */ 662 m->m_flags &= ~M_PROMISC; 663 if (carp_input(m, (uint8_t *)&eh->ether_shost, 664 (uint8_t *)&eh->ether_dhost, eh->ether_type) == 0) 665 return; 666 } 667 #endif /* NCARP > 0 */ 668 if ((m->m_flags & (M_BCAST|M_MCAST|M_PROMISC)) == 0 && 669 (ifp->if_flags & IFF_PROMISC) != 0 && 670 memcmp(CLLADDR(ifp->if_sadl), eh->ether_dhost, 671 ETHER_ADDR_LEN) != 0) { 672 m->m_flags |= M_PROMISC; 673 } 674 675 if ((m->m_flags & M_PROMISC) == 0) { 676 if (pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 677 return; 678 if (m == NULL) 679 return; 680 681 eh = mtod(m, struct ether_header *); 682 etype = ntohs(eh->ether_type); 683 ehlen = sizeof(*eh); 684 } 685 686 #if NAGR > 0 687 if (ifp->if_agrprivate && 688 __predict_true(etype != ETHERTYPE_SLOWPROTOCOLS)) { 689 m->m_flags &= ~M_PROMISC; 690 agr_input(ifp, m); 691 return; 692 } 693 #endif /* NAGR > 0 */ 694 695 /* 696 * If VLANs are configured on the interface, check to 697 * see if the device performed the decapsulation and 698 * provided us with the tag. 699 */ 700 if (ec->ec_nvlans && m_tag_find(m, PACKET_TAG_VLAN, NULL) != NULL) { 701 #if NVLAN > 0 702 /* 703 * vlan_input() will either recursively call ether_input() 704 * or drop the packet. 705 */ 706 vlan_input(ifp, m); 707 #else 708 m_freem(m); 709 #endif 710 return; 711 } 712 713 /* 714 * Handle protocols that expect to have the Ethernet header 715 * (and possibly FCS) intact. 716 */ 717 switch (etype) { 718 case ETHERTYPE_VLAN: { 719 struct ether_vlan_header *evl = (void *)eh; 720 /* 721 * If there is a tag of 0, then the VLAN header was probably 722 * just being used to store the priority. Extract the ether 723 * type, and if IP or IPV6, let them deal with it. 724 */ 725 if (m->m_len <= sizeof(*evl) 726 && EVL_VLANOFTAG(evl->evl_tag) == 0) { 727 etype = ntohs(evl->evl_proto); 728 ehlen = sizeof(*evl); 729 if ((m->m_flags & M_PROMISC) == 0 730 && (etype == ETHERTYPE_IP 731 || etype == ETHERTYPE_IPV6)) 732 break; 733 } 734 #if NVLAN > 0 735 /* 736 * vlan_input() will either recursively call ether_input() 737 * or drop the packet. 738 */ 739 if (((struct ethercom *)ifp)->ec_nvlans != 0) 740 vlan_input(ifp, m); 741 else 742 #endif /* NVLAN > 0 */ 743 m_freem(m); 744 return; 745 } 746 #if NPPPOE > 0 747 case ETHERTYPE_PPPOEDISC: 748 case ETHERTYPE_PPPOE: 749 if (m->m_flags & M_PROMISC) { 750 m_freem(m); 751 return; 752 } 753 #ifndef PPPOE_SERVER 754 if (m->m_flags & (M_MCAST | M_BCAST)) { 755 m_freem(m); 756 return; 757 } 758 #endif 759 760 if (etype == ETHERTYPE_PPPOEDISC) 761 inq = &ppoediscinq; 762 else 763 inq = &ppoeinq; 764 if (IF_QFULL(inq)) { 765 IF_DROP(inq); 766 m_freem(m); 767 } else { 768 IF_ENQUEUE(inq, m); 769 softint_schedule(pppoe_softintr); 770 } 771 return; 772 #endif /* NPPPOE > 0 */ 773 case ETHERTYPE_SLOWPROTOCOLS: { 774 uint8_t subtype; 775 776 #if defined(DIAGNOSTIC) 777 if (m->m_pkthdr.len < sizeof(*eh) + sizeof(subtype)) { 778 panic("ether_input: too short slow protocol packet"); 779 } 780 #endif 781 m_copydata(m, sizeof(*eh), sizeof(subtype), &subtype); 782 switch (subtype) { 783 #if NAGR > 0 784 case SLOWPROTOCOLS_SUBTYPE_LACP: 785 if (ifp->if_agrprivate) { 786 ieee8023ad_lacp_input(ifp, m); 787 return; 788 } 789 break; 790 791 case SLOWPROTOCOLS_SUBTYPE_MARKER: 792 if (ifp->if_agrprivate) { 793 ieee8023ad_marker_input(ifp, m); 794 return; 795 } 796 break; 797 #endif /* NAGR > 0 */ 798 default: 799 if (subtype == 0 || subtype > 10) { 800 /* illegal value */ 801 m_freem(m); 802 return; 803 } 804 /* unknown subtype */ 805 break; 806 } 807 /* FALLTHROUGH */ 808 } 809 default: 810 if (m->m_flags & M_PROMISC) { 811 m_freem(m); 812 return; 813 } 814 } 815 816 /* If the CRC is still on the packet, trim it off. */ 817 if (m->m_flags & M_HASFCS) { 818 m_adj(m, -ETHER_CRC_LEN); 819 m->m_flags &= ~M_HASFCS; 820 } 821 822 if (etype > ETHERMTU + sizeof (struct ether_header)) { 823 /* Strip off the Ethernet header. */ 824 m_adj(m, ehlen); 825 826 switch (etype) { 827 #ifdef INET 828 case ETHERTYPE_IP: 829 #ifdef GATEWAY 830 if (ipflow_fastforward(m)) 831 return; 832 #endif 833 pktq = ip_pktq; 834 break; 835 836 case ETHERTYPE_ARP: 837 isr = NETISR_ARP; 838 inq = &arpintrq; 839 break; 840 841 case ETHERTYPE_REVARP: 842 revarpinput(m); /* XXX queue? */ 843 return; 844 #endif 845 #ifdef INET6 846 case ETHERTYPE_IPV6: 847 if (__predict_false(!in6_present)) { 848 m_freem(m); 849 return; 850 } 851 #ifdef GATEWAY 852 if (ip6flow_fastforward(&m)) 853 return; 854 #endif 855 pktq = ip6_pktq; 856 break; 857 #endif 858 #ifdef IPX 859 case ETHERTYPE_IPX: 860 isr = NETISR_IPX; 861 inq = &ipxintrq; 862 break; 863 #endif 864 #ifdef NETATALK 865 case ETHERTYPE_ATALK: 866 isr = NETISR_ATALK; 867 inq = &atintrq1; 868 break; 869 case ETHERTYPE_AARP: 870 /* probably this should be done with a NETISR as well */ 871 aarpinput(ifp, m); /* XXX */ 872 return; 873 #endif /* NETATALK */ 874 #ifdef MPLS 875 case ETHERTYPE_MPLS: 876 isr = NETISR_MPLS; 877 inq = &mplsintrq; 878 break; 879 #endif 880 default: 881 m_freem(m); 882 return; 883 } 884 } else { 885 #if defined (LLC) || defined (NETATALK) 886 l = (struct llc *)(eh+1); 887 switch (l->llc_dsap) { 888 #ifdef NETATALK 889 case LLC_SNAP_LSAP: 890 switch (l->llc_control) { 891 case LLC_UI: 892 if (l->llc_ssap != LLC_SNAP_LSAP) { 893 goto dropanyway; 894 } 895 896 if (memcmp(&(l->llc_snap_org_code)[0], 897 at_org_code, sizeof(at_org_code)) == 0 && 898 ntohs(l->llc_snap_ether_type) == 899 ETHERTYPE_ATALK) { 900 inq = &atintrq2; 901 m_adj(m, sizeof(struct ether_header) 902 + sizeof(struct llc)); 903 isr = NETISR_ATALK; 904 break; 905 } 906 907 if (memcmp(&(l->llc_snap_org_code)[0], 908 aarp_org_code, 909 sizeof(aarp_org_code)) == 0 && 910 ntohs(l->llc_snap_ether_type) == 911 ETHERTYPE_AARP) { 912 m_adj( m, sizeof(struct ether_header) 913 + sizeof(struct llc)); 914 aarpinput(ifp, m); /* XXX */ 915 return; 916 } 917 918 default: 919 goto dropanyway; 920 } 921 break; 922 dropanyway: 923 #endif 924 default: 925 m_freem(m); 926 return; 927 } 928 #else /* ISO || LLC || NETATALK*/ 929 m_freem(m); 930 return; 931 #endif /* ISO || LLC || NETATALK*/ 932 } 933 934 if (__predict_true(pktq)) { 935 const uint32_t h = pktq_rps_hash(m); 936 if (__predict_false(!pktq_enqueue(pktq, m, h))) { 937 m_freem(m); 938 } 939 return; 940 } 941 942 if (__predict_false(!inq)) { 943 /* Should not happen. */ 944 m_freem(m); 945 return; 946 } 947 if (IF_QFULL(inq)) { 948 IF_DROP(inq); 949 m_freem(m); 950 } else { 951 IF_ENQUEUE(inq, m); 952 schednetisr(isr); 953 } 954 } 955 956 /* 957 * Convert Ethernet address to printable (loggable) representation. 958 */ 959 char * 960 ether_sprintf(const u_char *ap) 961 { 962 static char etherbuf[3 * ETHER_ADDR_LEN]; 963 return ether_snprintf(etherbuf, sizeof(etherbuf), ap); 964 } 965 966 char * 967 ether_snprintf(char *buf, size_t len, const u_char *ap) 968 { 969 char *cp = buf; 970 size_t i; 971 972 for (i = 0; i < len / 3; i++) { 973 *cp++ = hexdigits[*ap >> 4]; 974 *cp++ = hexdigits[*ap++ & 0xf]; 975 *cp++ = ':'; 976 } 977 *--cp = '\0'; 978 return buf; 979 } 980 981 /* 982 * Perform common duties while attaching to interface list 983 */ 984 void 985 ether_ifattach(struct ifnet *ifp, const uint8_t *lla) 986 { 987 struct ethercom *ec = (struct ethercom *)ifp; 988 989 ifp->if_type = IFT_ETHER; 990 ifp->if_hdrlen = ETHER_HDR_LEN; 991 ifp->if_dlt = DLT_EN10MB; 992 ifp->if_mtu = ETHERMTU; 993 ifp->if_output = ether_output; 994 ifp->if_input = ether_input; 995 if (ifp->if_baudrate == 0) 996 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 997 998 if_set_sadl(ifp, lla, ETHER_ADDR_LEN, !ETHER_IS_LOCAL(lla)); 999 1000 LIST_INIT(&ec->ec_multiaddrs); 1001 ifp->if_broadcastaddr = etherbroadcastaddr; 1002 bpf_attach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 1003 #ifdef MBUFTRACE 1004 strlcpy(ec->ec_tx_mowner.mo_name, ifp->if_xname, 1005 sizeof(ec->ec_tx_mowner.mo_name)); 1006 strlcpy(ec->ec_tx_mowner.mo_descr, "tx", 1007 sizeof(ec->ec_tx_mowner.mo_descr)); 1008 strlcpy(ec->ec_rx_mowner.mo_name, ifp->if_xname, 1009 sizeof(ec->ec_rx_mowner.mo_name)); 1010 strlcpy(ec->ec_rx_mowner.mo_descr, "rx", 1011 sizeof(ec->ec_rx_mowner.mo_descr)); 1012 MOWNER_ATTACH(&ec->ec_tx_mowner); 1013 MOWNER_ATTACH(&ec->ec_rx_mowner); 1014 ifp->if_mowner = &ec->ec_tx_mowner; 1015 #endif 1016 } 1017 1018 void 1019 ether_ifdetach(struct ifnet *ifp) 1020 { 1021 struct ethercom *ec = (void *) ifp; 1022 struct ether_multi *enm; 1023 int s; 1024 1025 /* 1026 * Prevent further calls to ioctl (for example turning off 1027 * promiscuous mode from the bridge code), which eventually can 1028 * call if_init() which can cause panics because the interface 1029 * is in the process of being detached. Return device not configured 1030 * instead. 1031 */ 1032 ifp->if_ioctl = (int (*)(struct ifnet *, u_long, void *))enxio; 1033 1034 #if NBRIDGE > 0 1035 if (ifp->if_bridge) 1036 bridge_ifdetach(ifp); 1037 #endif 1038 1039 bpf_detach(ifp); 1040 1041 #if NVLAN > 0 1042 if (ec->ec_nvlans) 1043 vlan_ifdetach(ifp); 1044 #endif 1045 1046 s = splnet(); 1047 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1048 LIST_REMOVE(enm, enm_list); 1049 free(enm, M_IFMADDR); 1050 ec->ec_multicnt--; 1051 } 1052 splx(s); 1053 1054 ifp->if_mowner = NULL; 1055 MOWNER_DETACH(&ec->ec_rx_mowner); 1056 MOWNER_DETACH(&ec->ec_tx_mowner); 1057 } 1058 1059 #if 0 1060 /* 1061 * This is for reference. We have a table-driven version 1062 * of the little-endian crc32 generator, which is faster 1063 * than the double-loop. 1064 */ 1065 uint32_t 1066 ether_crc32_le(const uint8_t *buf, size_t len) 1067 { 1068 uint32_t c, crc, carry; 1069 size_t i, j; 1070 1071 crc = 0xffffffffU; /* initial value */ 1072 1073 for (i = 0; i < len; i++) { 1074 c = buf[i]; 1075 for (j = 0; j < 8; j++) { 1076 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1077 crc >>= 1; 1078 c >>= 1; 1079 if (carry) 1080 crc = (crc ^ ETHER_CRC_POLY_LE); 1081 } 1082 } 1083 1084 return (crc); 1085 } 1086 #else 1087 uint32_t 1088 ether_crc32_le(const uint8_t *buf, size_t len) 1089 { 1090 static const uint32_t crctab[] = { 1091 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1092 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1093 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1094 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1095 }; 1096 uint32_t crc; 1097 size_t i; 1098 1099 crc = 0xffffffffU; /* initial value */ 1100 1101 for (i = 0; i < len; i++) { 1102 crc ^= buf[i]; 1103 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1104 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1105 } 1106 1107 return (crc); 1108 } 1109 #endif 1110 1111 uint32_t 1112 ether_crc32_be(const uint8_t *buf, size_t len) 1113 { 1114 uint32_t c, crc, carry; 1115 size_t i, j; 1116 1117 crc = 0xffffffffU; /* initial value */ 1118 1119 for (i = 0; i < len; i++) { 1120 c = buf[i]; 1121 for (j = 0; j < 8; j++) { 1122 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1123 crc <<= 1; 1124 c >>= 1; 1125 if (carry) 1126 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1127 } 1128 } 1129 1130 return (crc); 1131 } 1132 1133 #ifdef INET 1134 const uint8_t ether_ipmulticast_min[ETHER_ADDR_LEN] = 1135 { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1136 const uint8_t ether_ipmulticast_max[ETHER_ADDR_LEN] = 1137 { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1138 #endif 1139 #ifdef INET6 1140 const uint8_t ether_ip6multicast_min[ETHER_ADDR_LEN] = 1141 { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1142 const uint8_t ether_ip6multicast_max[ETHER_ADDR_LEN] = 1143 { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1144 #endif 1145 1146 /* 1147 * ether_aton implementation, not using a static buffer. 1148 */ 1149 int 1150 ether_aton_r(u_char *dest, size_t len, const char *str) 1151 { 1152 const u_char *cp = (const void *)str; 1153 u_char *ep; 1154 1155 #define atox(c) (((c) <= '9') ? ((c) - '0') : ((toupper(c) - 'A') + 10)) 1156 1157 if (len < ETHER_ADDR_LEN) 1158 return ENOSPC; 1159 1160 ep = dest + ETHER_ADDR_LEN; 1161 1162 while (*cp) { 1163 if (!isxdigit(*cp)) 1164 return EINVAL; 1165 *dest = atox(*cp); 1166 cp++; 1167 if (isxdigit(*cp)) { 1168 *dest = (*dest << 4) | atox(*cp); 1169 dest++; 1170 cp++; 1171 } else 1172 dest++; 1173 if (dest == ep) 1174 return *cp == '\0' ? 0 : ENAMETOOLONG; 1175 switch (*cp) { 1176 case ':': 1177 case '-': 1178 case '.': 1179 cp++; 1180 break; 1181 } 1182 } 1183 return ENOBUFS; 1184 } 1185 1186 /* 1187 * Convert a sockaddr into an Ethernet address or range of Ethernet 1188 * addresses. 1189 */ 1190 int 1191 ether_multiaddr(const struct sockaddr *sa, uint8_t addrlo[ETHER_ADDR_LEN], 1192 uint8_t addrhi[ETHER_ADDR_LEN]) 1193 { 1194 #ifdef INET 1195 const struct sockaddr_in *sin; 1196 #endif /* INET */ 1197 #ifdef INET6 1198 const struct sockaddr_in6 *sin6; 1199 #endif /* INET6 */ 1200 1201 switch (sa->sa_family) { 1202 1203 case AF_UNSPEC: 1204 memcpy(addrlo, sa->sa_data, ETHER_ADDR_LEN); 1205 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1206 break; 1207 1208 #ifdef INET 1209 case AF_INET: 1210 sin = satocsin(sa); 1211 if (sin->sin_addr.s_addr == INADDR_ANY) { 1212 /* 1213 * An IP address of INADDR_ANY means listen to 1214 * or stop listening to all of the Ethernet 1215 * multicast addresses used for IP. 1216 * (This is for the sake of IP multicast routers.) 1217 */ 1218 memcpy(addrlo, ether_ipmulticast_min, ETHER_ADDR_LEN); 1219 memcpy(addrhi, ether_ipmulticast_max, ETHER_ADDR_LEN); 1220 } 1221 else { 1222 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1223 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1224 } 1225 break; 1226 #endif 1227 #ifdef INET6 1228 case AF_INET6: 1229 sin6 = satocsin6(sa); 1230 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1231 /* 1232 * An IP6 address of 0 means listen to or stop 1233 * listening to all of the Ethernet multicast 1234 * address used for IP6. 1235 * (This is used for multicast routers.) 1236 */ 1237 memcpy(addrlo, ether_ip6multicast_min, ETHER_ADDR_LEN); 1238 memcpy(addrhi, ether_ip6multicast_max, ETHER_ADDR_LEN); 1239 } else { 1240 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1241 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1242 } 1243 break; 1244 #endif 1245 1246 default: 1247 return EAFNOSUPPORT; 1248 } 1249 return 0; 1250 } 1251 1252 /* 1253 * Add an Ethernet multicast address or range of addresses to the list for a 1254 * given interface. 1255 */ 1256 int 1257 ether_addmulti(const struct sockaddr *sa, struct ethercom *ec) 1258 { 1259 struct ether_multi *enm; 1260 u_char addrlo[ETHER_ADDR_LEN]; 1261 u_char addrhi[ETHER_ADDR_LEN]; 1262 int s = splnet(), error; 1263 1264 error = ether_multiaddr(sa, addrlo, addrhi); 1265 if (error != 0) { 1266 splx(s); 1267 return error; 1268 } 1269 1270 /* 1271 * Verify that we have valid Ethernet multicast addresses. 1272 */ 1273 if (!ETHER_IS_MULTICAST(addrlo) || !ETHER_IS_MULTICAST(addrhi)) { 1274 splx(s); 1275 return EINVAL; 1276 } 1277 /* 1278 * See if the address range is already in the list. 1279 */ 1280 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1281 if (enm != NULL) { 1282 /* 1283 * Found it; just increment the reference count. 1284 */ 1285 ++enm->enm_refcount; 1286 splx(s); 1287 return 0; 1288 } 1289 /* 1290 * New address or range; malloc a new multicast record 1291 * and link it into the interface's multicast list. 1292 */ 1293 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1294 if (enm == NULL) { 1295 splx(s); 1296 return ENOBUFS; 1297 } 1298 memcpy(enm->enm_addrlo, addrlo, 6); 1299 memcpy(enm->enm_addrhi, addrhi, 6); 1300 enm->enm_refcount = 1; 1301 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1302 ec->ec_multicnt++; 1303 splx(s); 1304 /* 1305 * Return ENETRESET to inform the driver that the list has changed 1306 * and its reception filter should be adjusted accordingly. 1307 */ 1308 return ENETRESET; 1309 } 1310 1311 /* 1312 * Delete a multicast address record. 1313 */ 1314 int 1315 ether_delmulti(const struct sockaddr *sa, struct ethercom *ec) 1316 { 1317 struct ether_multi *enm; 1318 u_char addrlo[ETHER_ADDR_LEN]; 1319 u_char addrhi[ETHER_ADDR_LEN]; 1320 int s = splnet(), error; 1321 1322 error = ether_multiaddr(sa, addrlo, addrhi); 1323 if (error != 0) { 1324 splx(s); 1325 return (error); 1326 } 1327 1328 /* 1329 * Look ur the address in our list. 1330 */ 1331 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1332 if (enm == NULL) { 1333 splx(s); 1334 return (ENXIO); 1335 } 1336 if (--enm->enm_refcount != 0) { 1337 /* 1338 * Still some claims to this record. 1339 */ 1340 splx(s); 1341 return (0); 1342 } 1343 /* 1344 * No remaining claims to this record; unlink and free it. 1345 */ 1346 LIST_REMOVE(enm, enm_list); 1347 free(enm, M_IFMADDR); 1348 ec->ec_multicnt--; 1349 splx(s); 1350 /* 1351 * Return ENETRESET to inform the driver that the list has changed 1352 * and its reception filter should be adjusted accordingly. 1353 */ 1354 return (ENETRESET); 1355 } 1356 1357 void 1358 ether_set_ifflags_cb(struct ethercom *ec, ether_cb_t cb) 1359 { 1360 ec->ec_ifflags_cb = cb; 1361 } 1362 1363 /* 1364 * Common ioctls for Ethernet interfaces. Note, we must be 1365 * called at splnet(). 1366 */ 1367 int 1368 ether_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1369 { 1370 struct ethercom *ec = (void *) ifp; 1371 struct eccapreq *eccr; 1372 struct ifreq *ifr = (struct ifreq *)data; 1373 struct if_laddrreq *iflr = data; 1374 const struct sockaddr_dl *sdl; 1375 static const uint8_t zero[ETHER_ADDR_LEN]; 1376 int error; 1377 1378 switch (cmd) { 1379 case SIOCINITIFADDR: 1380 { 1381 struct ifaddr *ifa = (struct ifaddr *)data; 1382 if (ifa->ifa_addr->sa_family != AF_LINK 1383 && (ifp->if_flags & (IFF_UP|IFF_RUNNING)) != 1384 (IFF_UP|IFF_RUNNING)) { 1385 ifp->if_flags |= IFF_UP; 1386 if ((error = (*ifp->if_init)(ifp)) != 0) 1387 return error; 1388 } 1389 #ifdef INET 1390 if (ifa->ifa_addr->sa_family == AF_INET) 1391 arp_ifinit(ifp, ifa); 1392 #endif /* INET */ 1393 return 0; 1394 } 1395 1396 case SIOCSIFMTU: 1397 { 1398 int maxmtu; 1399 1400 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1401 maxmtu = ETHERMTU_JUMBO; 1402 else 1403 maxmtu = ETHERMTU; 1404 1405 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1406 return EINVAL; 1407 else if ((error = ifioctl_common(ifp, cmd, data)) != ENETRESET) 1408 return error; 1409 else if (ifp->if_flags & IFF_UP) { 1410 /* Make sure the device notices the MTU change. */ 1411 return (*ifp->if_init)(ifp); 1412 } else 1413 return 0; 1414 } 1415 1416 case SIOCSIFFLAGS: 1417 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1418 return error; 1419 switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) { 1420 case IFF_RUNNING: 1421 /* 1422 * If interface is marked down and it is running, 1423 * then stop and disable it. 1424 */ 1425 (*ifp->if_stop)(ifp, 1); 1426 break; 1427 case IFF_UP: 1428 /* 1429 * If interface is marked up and it is stopped, then 1430 * start it. 1431 */ 1432 return (*ifp->if_init)(ifp); 1433 case IFF_UP|IFF_RUNNING: 1434 error = 0; 1435 if (ec->ec_ifflags_cb == NULL || 1436 (error = (*ec->ec_ifflags_cb)(ec)) == ENETRESET) { 1437 /* 1438 * Reset the interface to pick up 1439 * changes in any other flags that 1440 * affect the hardware state. 1441 */ 1442 return (*ifp->if_init)(ifp); 1443 } else 1444 return error; 1445 case 0: 1446 break; 1447 } 1448 return 0; 1449 case SIOCGETHERCAP: 1450 eccr = (struct eccapreq *)data; 1451 eccr->eccr_capabilities = ec->ec_capabilities; 1452 eccr->eccr_capenable = ec->ec_capenable; 1453 return 0; 1454 case SIOCADDMULTI: 1455 return ether_addmulti(ifreq_getaddr(cmd, ifr), ec); 1456 case SIOCDELMULTI: 1457 return ether_delmulti(ifreq_getaddr(cmd, ifr), ec); 1458 case SIOCSIFMEDIA: 1459 case SIOCGIFMEDIA: 1460 if (ec->ec_mii == NULL) 1461 return ENOTTY; 1462 return ifmedia_ioctl(ifp, ifr, &ec->ec_mii->mii_media, cmd); 1463 case SIOCALIFADDR: 1464 sdl = satocsdl(sstocsa(&iflr->addr)); 1465 if (sdl->sdl_family != AF_LINK) 1466 ; 1467 else if (ETHER_IS_MULTICAST(CLLADDR(sdl))) 1468 return EINVAL; 1469 else if (memcmp(zero, CLLADDR(sdl), sizeof(zero)) == 0) 1470 return EINVAL; 1471 /*FALLTHROUGH*/ 1472 default: 1473 return ifioctl_common(ifp, cmd, data); 1474 } 1475 return 0; 1476 } 1477 1478 static int 1479 ether_multicast_sysctl(SYSCTLFN_ARGS) 1480 { 1481 struct ether_multi *enm; 1482 struct ether_multi_sysctl addr; 1483 struct ifnet *ifp; 1484 struct ethercom *ec; 1485 int error; 1486 size_t written; 1487 1488 if (namelen != 1) 1489 return EINVAL; 1490 1491 ifp = if_byindex(name[0]); 1492 if (ifp == NULL) 1493 return ENODEV; 1494 if (ifp->if_type != IFT_ETHER) { 1495 *oldlenp = 0; 1496 return 0; 1497 } 1498 ec = (struct ethercom *)ifp; 1499 1500 if (oldp == NULL) { 1501 *oldlenp = ec->ec_multicnt * sizeof(addr); 1502 return 0; 1503 } 1504 1505 memset(&addr, 0, sizeof(addr)); 1506 error = 0; 1507 written = 0; 1508 1509 LIST_FOREACH(enm, &ec->ec_multiaddrs, enm_list) { 1510 if (written + sizeof(addr) > *oldlenp) 1511 break; 1512 addr.enm_refcount = enm->enm_refcount; 1513 memcpy(addr.enm_addrlo, enm->enm_addrlo, ETHER_ADDR_LEN); 1514 memcpy(addr.enm_addrhi, enm->enm_addrhi, ETHER_ADDR_LEN); 1515 error = sysctl_copyout(l, &addr, oldp, sizeof(addr)); 1516 if (error) 1517 break; 1518 written += sizeof(addr); 1519 oldp = (char *)oldp + sizeof(addr); 1520 } 1521 1522 *oldlenp = written; 1523 return error; 1524 } 1525 1526 SYSCTL_SETUP(sysctl_net_ether_setup, "sysctl net.ether subtree setup") 1527 { 1528 const struct sysctlnode *rnode = NULL; 1529 1530 sysctl_createv(clog, 0, NULL, &rnode, 1531 CTLFLAG_PERMANENT, 1532 CTLTYPE_NODE, "ether", 1533 SYSCTL_DESCR("Ethernet-specific information"), 1534 NULL, 0, NULL, 0, 1535 CTL_NET, CTL_CREATE, CTL_EOL); 1536 1537 sysctl_createv(clog, 0, &rnode, NULL, 1538 CTLFLAG_PERMANENT, 1539 CTLTYPE_NODE, "multicast", 1540 SYSCTL_DESCR("multicast addresses"), 1541 ether_multicast_sysctl, 0, NULL, 0, 1542 CTL_CREATE, CTL_EOL); 1543 } 1544 1545 void 1546 etherinit(void) 1547 { 1548 mutex_init(&bigpktpps_lock, MUTEX_DEFAULT, IPL_NET); 1549 } 1550
Indexes created Sun Sep 21 20:09:37 GMT 2025