if_ethersubr.c revision 1.204.4.1
1 /* $NetBSD: if_ethersubr.c,v 1.204.4.1 2017/02/05 19:14:01 snj 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 1.204.4.1 2017/02/05 19:14:01 snj 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 m_freem(m); 303 return 0; 304 } 305 memcpy(edst, tha, sizeof(edst)); 306 } 307 308 ah->ar_hrd = htons(ARPHRD_ETHER); 309 310 switch (ntohs(ah->ar_op)) { 311 case ARPOP_REVREQUEST: 312 case ARPOP_REVREPLY: 313 etype = htons(ETHERTYPE_REVARP); 314 break; 315 316 case ARPOP_REQUEST: 317 case ARPOP_REPLY: 318 default: 319 etype = htons(ETHERTYPE_ARP); 320 } 321 322 break; 323 #endif 324 #ifdef INET6 325 case AF_INET6: 326 if (!nd6_storelladdr(ifp, rt, m, dst, edst, sizeof(edst))){ 327 /* something bad happened */ 328 return (0); 329 } 330 etype = htons(ETHERTYPE_IPV6); 331 break; 332 #endif 333 #ifdef NETATALK 334 case AF_APPLETALK: 335 if (!aarpresolve(ifp, m, (const struct sockaddr_at *)dst, edst)) { 336 #ifdef NETATALKDEBUG 337 printf("aarpresolv failed\n"); 338 #endif /* NETATALKDEBUG */ 339 return (0); 340 } 341 /* 342 * ifaddr is the first thing in at_ifaddr 343 */ 344 aa = (struct at_ifaddr *) at_ifawithnet( 345 (const struct sockaddr_at *)dst, ifp); 346 if (aa == NULL) 347 goto bad; 348 349 /* 350 * In the phase 2 case, we need to prepend an mbuf for the 351 * llc header. Since we must preserve the value of m, 352 * which is passed to us by value, we m_copy() the first 353 * mbuf, and use it for our llc header. 354 */ 355 if (aa->aa_flags & AFA_PHASE2) { 356 struct llc llc; 357 358 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 359 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 360 llc.llc_control = LLC_UI; 361 memcpy(llc.llc_snap_org_code, at_org_code, 362 sizeof(llc.llc_snap_org_code)); 363 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 364 memcpy(mtod(m, void *), &llc, sizeof(struct llc)); 365 } else { 366 etype = htons(ETHERTYPE_ATALK); 367 } 368 break; 369 #endif /* NETATALK */ 370 #ifdef IPX 371 case AF_IPX: 372 etype = htons(ETHERTYPE_IPX); 373 memcpy(edst, 374 &(((const struct sockaddr_ipx *)dst)->sipx_addr.x_host), 375 sizeof(edst)); 376 /* If broadcasting on a simplex interface, loopback a copy */ 377 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 378 mcopy = m_copy(m, 0, (int)M_COPYALL); 379 break; 380 #endif 381 case pseudo_AF_HDRCMPLT: 382 hdrcmplt = 1; 383 memcpy(esrc, 384 ((const struct ether_header *)dst->sa_data)->ether_shost, 385 sizeof(esrc)); 386 /* FALLTHROUGH */ 387 388 case AF_UNSPEC: 389 memcpy(edst, 390 ((const struct ether_header *)dst->sa_data)->ether_dhost, 391 sizeof(edst)); 392 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 393 etype = ((const struct ether_header *)dst->sa_data)->ether_type; 394 break; 395 396 default: 397 printf("%s: can't handle af%d\n", ifp->if_xname, 398 dst->sa_family); 399 senderr(EAFNOSUPPORT); 400 } 401 402 #ifdef MPLS 403 if (rt0 != NULL && rt_gettag(rt0) != NULL && 404 rt_gettag(rt0)->sa_family == AF_MPLS && 405 (m->m_flags & (M_MCAST | M_BCAST)) == 0) { 406 union mpls_shim msh; 407 msh.s_addr = MPLS_GETSADDR(rt0); 408 if (msh.shim.label != MPLS_LABEL_IMPLNULL) 409 etype = htons(ETHERTYPE_MPLS); 410 } 411 #endif 412 413 if (mcopy) 414 (void)looutput(ifp, mcopy, dst, rt); 415 416 /* If no ether type is set, this must be a 802.2 formatted packet. 417 */ 418 if (etype == 0) 419 etype = htons(m->m_pkthdr.len); 420 /* 421 * Add local net header. If no space in first mbuf, 422 * allocate another. 423 */ 424 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 425 if (m == 0) 426 senderr(ENOBUFS); 427 eh = mtod(m, struct ether_header *); 428 /* Note: etype is already in network byte order. */ 429 (void)memcpy(&eh->ether_type, &etype, sizeof(eh->ether_type)); 430 memcpy(eh->ether_dhost, edst, sizeof(edst)); 431 if (hdrcmplt) 432 memcpy(eh->ether_shost, esrc, sizeof(eh->ether_shost)); 433 else 434 memcpy(eh->ether_shost, CLLADDR(ifp->if_sadl), 435 sizeof(eh->ether_shost)); 436 437 #if NCARP > 0 438 if (ifp0 != ifp && ifp0->if_type == IFT_CARP) { 439 memcpy(eh->ether_shost, CLLADDR(ifp0->if_sadl), 440 sizeof(eh->ether_shost)); 441 } 442 #endif /* NCARP > 0 */ 443 444 if ((error = pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 445 return (error); 446 if (m == NULL) 447 return (0); 448 449 #if NBRIDGE > 0 450 /* 451 * Bridges require special output handling. 452 */ 453 if (ifp->if_bridge) 454 return (bridge_output(ifp, m, NULL, NULL)); 455 #endif 456 457 #if NCARP > 0 458 if (ifp != ifp0) 459 ifp0->if_obytes += m->m_pkthdr.len + ETHER_HDR_LEN; 460 #endif /* NCARP > 0 */ 461 462 #ifdef ALTQ 463 /* 464 * If ALTQ is enabled on the parent interface, do 465 * classification; the queueing discipline might not 466 * require classification, but might require the 467 * address family/header pointer in the pktattr. 468 */ 469 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 470 altq_etherclassify(&ifp->if_snd, m, &pktattr); 471 #endif 472 return ifq_enqueue(ifp, m ALTQ_COMMA ALTQ_DECL(&pktattr)); 473 474 bad: 475 if (m) 476 m_freem(m); 477 return (error); 478 } 479 480 #ifdef ALTQ 481 /* 482 * This routine is a slight hack to allow a packet to be classified 483 * if the Ethernet headers are present. It will go away when ALTQ's 484 * classification engine understands link headers. 485 */ 486 void 487 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m, 488 struct altq_pktattr *pktattr) 489 { 490 struct ether_header *eh; 491 uint16_t ether_type; 492 int hlen, af, hdrsize; 493 void *hdr; 494 495 hlen = ETHER_HDR_LEN; 496 eh = mtod(m, struct ether_header *); 497 498 ether_type = htons(eh->ether_type); 499 500 if (ether_type < ETHERMTU) { 501 /* LLC/SNAP */ 502 struct llc *llc = (struct llc *)(eh + 1); 503 hlen += 8; 504 505 if (m->m_len < hlen || 506 llc->llc_dsap != LLC_SNAP_LSAP || 507 llc->llc_ssap != LLC_SNAP_LSAP || 508 llc->llc_control != LLC_UI) { 509 /* Not SNAP. */ 510 goto bad; 511 } 512 513 ether_type = htons(llc->llc_un.type_snap.ether_type); 514 } 515 516 switch (ether_type) { 517 case ETHERTYPE_IP: 518 af = AF_INET; 519 hdrsize = 20; /* sizeof(struct ip) */ 520 break; 521 522 case ETHERTYPE_IPV6: 523 af = AF_INET6; 524 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 525 break; 526 527 default: 528 af = AF_UNSPEC; 529 hdrsize = 0; 530 break; 531 } 532 533 while (m->m_len <= hlen) { 534 hlen -= m->m_len; 535 m = m->m_next; 536 } 537 if (m->m_len < (hlen + hdrsize)) { 538 /* 539 * protocol header not in a single mbuf. 540 * We can't cope with this situation right 541 * now (but it shouldn't ever happen, really, anyhow). 542 */ 543 #ifdef DEBUG 544 printf("altq_etherclassify: headers span multiple mbufs: " 545 "%d < %d\n", m->m_len, (hlen + hdrsize)); 546 #endif 547 goto bad; 548 } 549 550 m->m_data += hlen; 551 m->m_len -= hlen; 552 553 hdr = mtod(m, void *); 554 555 if (ALTQ_NEEDS_CLASSIFY(ifq)) 556 pktattr->pattr_class = 557 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 558 pktattr->pattr_af = af; 559 pktattr->pattr_hdr = hdr; 560 561 m->m_data -= hlen; 562 m->m_len += hlen; 563 564 return; 565 566 bad: 567 pktattr->pattr_class = NULL; 568 pktattr->pattr_hdr = NULL; 569 pktattr->pattr_af = AF_UNSPEC; 570 } 571 #endif /* ALTQ */ 572 573 /* 574 * Process a received Ethernet packet; 575 * the packet is in the mbuf chain m with 576 * the ether header. 577 */ 578 void 579 ether_input(struct ifnet *ifp, struct mbuf *m) 580 { 581 struct ethercom *ec = (struct ethercom *) ifp; 582 pktqueue_t *pktq = NULL; 583 struct ifqueue *inq = NULL; 584 uint16_t etype; 585 struct ether_header *eh; 586 size_t ehlen; 587 static int earlypkts; 588 int isr = 0; 589 #if defined (LLC) || defined(NETATALK) 590 struct llc *l; 591 #endif 592 593 if ((ifp->if_flags & IFF_UP) == 0) { 594 m_freem(m); 595 return; 596 } 597 598 #ifdef MBUFTRACE 599 m_claimm(m, &ec->ec_rx_mowner); 600 #endif 601 eh = mtod(m, struct ether_header *); 602 etype = ntohs(eh->ether_type); 603 ehlen = sizeof(*eh); 604 605 if(__predict_false(earlypkts < 100 || !rnd_initial_entropy)) { 606 rnd_add_data(NULL, eh, ehlen, 0); 607 earlypkts++; 608 } 609 610 /* 611 * Determine if the packet is within its size limits. 612 */ 613 if (etype != ETHERTYPE_MPLS && m->m_pkthdr.len > 614 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 615 mutex_enter(&bigpktpps_lock); 616 if (ppsratecheck(&bigpktppslim_last, &bigpktpps_count, 617 bigpktppslim)) { 618 printf("%s: discarding oversize frame (len=%d)\n", 619 ifp->if_xname, m->m_pkthdr.len); 620 } 621 mutex_exit(&bigpktpps_lock); 622 m_freem(m); 623 return; 624 } 625 626 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 627 /* 628 * If this is not a simplex interface, drop the packet 629 * if it came from us. 630 */ 631 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 632 memcmp(CLLADDR(ifp->if_sadl), eh->ether_shost, 633 ETHER_ADDR_LEN) == 0) { 634 m_freem(m); 635 return; 636 } 637 638 if (memcmp(etherbroadcastaddr, 639 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 640 m->m_flags |= M_BCAST; 641 else 642 m->m_flags |= M_MCAST; 643 ifp->if_imcasts++; 644 } 645 646 /* If the CRC is still on the packet, trim it off. */ 647 if (m->m_flags & M_HASFCS) { 648 m_adj(m, -ETHER_CRC_LEN); 649 m->m_flags &= ~M_HASFCS; 650 } 651 652 ifp->if_ibytes += m->m_pkthdr.len; 653 654 #if NCARP > 0 655 if (__predict_false(ifp->if_carp && ifp->if_type != IFT_CARP)) { 656 /* 657 * clear M_PROMISC, in case the packets comes from a 658 * vlan 659 */ 660 m->m_flags &= ~M_PROMISC; 661 if (carp_input(m, (uint8_t *)&eh->ether_shost, 662 (uint8_t *)&eh->ether_dhost, eh->ether_type) == 0) 663 return; 664 } 665 #endif /* NCARP > 0 */ 666 if ((m->m_flags & (M_BCAST|M_MCAST|M_PROMISC)) == 0 && 667 (ifp->if_flags & IFF_PROMISC) != 0 && 668 memcmp(CLLADDR(ifp->if_sadl), eh->ether_dhost, 669 ETHER_ADDR_LEN) != 0) { 670 m->m_flags |= M_PROMISC; 671 } 672 673 if ((m->m_flags & M_PROMISC) == 0) { 674 if (pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 675 return; 676 if (m == NULL) 677 return; 678 679 eh = mtod(m, struct ether_header *); 680 etype = ntohs(eh->ether_type); 681 ehlen = sizeof(*eh); 682 } 683 684 #if NAGR > 0 685 if (ifp->if_agrprivate && 686 __predict_true(etype != ETHERTYPE_SLOWPROTOCOLS)) { 687 m->m_flags &= ~M_PROMISC; 688 agr_input(ifp, m); 689 return; 690 } 691 #endif /* NAGR > 0 */ 692 693 /* 694 * If VLANs are configured on the interface, check to 695 * see if the device performed the decapsulation and 696 * provided us with the tag. 697 */ 698 if (ec->ec_nvlans && m_tag_find(m, PACKET_TAG_VLAN, NULL) != NULL) { 699 #if NVLAN > 0 700 /* 701 * vlan_input() will either recursively call ether_input() 702 * or drop the packet. 703 */ 704 vlan_input(ifp, m); 705 #else 706 m_freem(m); 707 #endif 708 return; 709 } 710 711 /* 712 * Handle protocols that expect to have the Ethernet header 713 * (and possibly FCS) intact. 714 */ 715 switch (etype) { 716 case ETHERTYPE_VLAN: { 717 struct ether_vlan_header *evl = (void *)eh; 718 /* 719 * If there is a tag of 0, then the VLAN header was probably 720 * just being used to store the priority. Extract the ether 721 * type, and if IP or IPV6, let them deal with it. 722 */ 723 if (m->m_len <= sizeof(*evl) 724 && EVL_VLANOFTAG(evl->evl_tag) == 0) { 725 etype = ntohs(evl->evl_proto); 726 ehlen = sizeof(*evl); 727 if ((m->m_flags & M_PROMISC) == 0 728 && (etype == ETHERTYPE_IP 729 || etype == ETHERTYPE_IPV6)) 730 break; 731 } 732 #if NVLAN > 0 733 /* 734 * vlan_input() will either recursively call ether_input() 735 * or drop the packet. 736 */ 737 if (((struct ethercom *)ifp)->ec_nvlans != 0) 738 vlan_input(ifp, m); 739 else 740 #endif /* NVLAN > 0 */ 741 m_freem(m); 742 return; 743 } 744 #if NPPPOE > 0 745 case ETHERTYPE_PPPOEDISC: 746 case ETHERTYPE_PPPOE: 747 if (m->m_flags & M_PROMISC) { 748 m_freem(m); 749 return; 750 } 751 #ifndef PPPOE_SERVER 752 if (m->m_flags & (M_MCAST | M_BCAST)) { 753 m_freem(m); 754 return; 755 } 756 #endif 757 758 if (etype == ETHERTYPE_PPPOEDISC) 759 inq = &ppoediscinq; 760 else 761 inq = &ppoeinq; 762 if (IF_QFULL(inq)) { 763 IF_DROP(inq); 764 m_freem(m); 765 } else { 766 IF_ENQUEUE(inq, m); 767 softint_schedule(pppoe_softintr); 768 } 769 return; 770 #endif /* NPPPOE > 0 */ 771 case ETHERTYPE_SLOWPROTOCOLS: { 772 uint8_t subtype; 773 774 #if defined(DIAGNOSTIC) 775 if (m->m_pkthdr.len < sizeof(*eh) + sizeof(subtype)) { 776 panic("ether_input: too short slow protocol packet"); 777 } 778 #endif 779 m_copydata(m, sizeof(*eh), sizeof(subtype), &subtype); 780 switch (subtype) { 781 #if NAGR > 0 782 case SLOWPROTOCOLS_SUBTYPE_LACP: 783 if (ifp->if_agrprivate) { 784 ieee8023ad_lacp_input(ifp, m); 785 return; 786 } 787 break; 788 789 case SLOWPROTOCOLS_SUBTYPE_MARKER: 790 if (ifp->if_agrprivate) { 791 ieee8023ad_marker_input(ifp, m); 792 return; 793 } 794 break; 795 #endif /* NAGR > 0 */ 796 default: 797 if (subtype == 0 || subtype > 10) { 798 /* illegal value */ 799 m_freem(m); 800 return; 801 } 802 /* unknown subtype */ 803 break; 804 } 805 /* FALLTHROUGH */ 806 } 807 default: 808 if (m->m_flags & M_PROMISC) { 809 m_freem(m); 810 return; 811 } 812 } 813 814 /* If the CRC is still on the packet, trim it off. */ 815 if (m->m_flags & M_HASFCS) { 816 m_adj(m, -ETHER_CRC_LEN); 817 m->m_flags &= ~M_HASFCS; 818 } 819 820 if (etype > ETHERMTU + sizeof (struct ether_header)) { 821 /* Strip off the Ethernet header. */ 822 m_adj(m, ehlen); 823 824 switch (etype) { 825 #ifdef INET 826 case ETHERTYPE_IP: 827 #ifdef GATEWAY 828 if (ipflow_fastforward(m)) 829 return; 830 #endif 831 pktq = ip_pktq; 832 break; 833 834 case ETHERTYPE_ARP: 835 isr = NETISR_ARP; 836 inq = &arpintrq; 837 break; 838 839 case ETHERTYPE_REVARP: 840 revarpinput(m); /* XXX queue? */ 841 return; 842 #endif 843 #ifdef INET6 844 case ETHERTYPE_IPV6: 845 if (__predict_false(!in6_present)) { 846 m_freem(m); 847 return; 848 } 849 #ifdef GATEWAY 850 if (ip6flow_fastforward(&m)) 851 return; 852 #endif 853 pktq = ip6_pktq; 854 break; 855 #endif 856 #ifdef IPX 857 case ETHERTYPE_IPX: 858 isr = NETISR_IPX; 859 inq = &ipxintrq; 860 break; 861 #endif 862 #ifdef NETATALK 863 case ETHERTYPE_ATALK: 864 isr = NETISR_ATALK; 865 inq = &atintrq1; 866 break; 867 case ETHERTYPE_AARP: 868 /* probably this should be done with a NETISR as well */ 869 aarpinput(ifp, m); /* XXX */ 870 return; 871 #endif /* NETATALK */ 872 #ifdef MPLS 873 case ETHERTYPE_MPLS: 874 isr = NETISR_MPLS; 875 inq = &mplsintrq; 876 break; 877 #endif 878 default: 879 m_freem(m); 880 return; 881 } 882 } else { 883 #if defined (LLC) || defined (NETATALK) 884 l = (struct llc *)(eh+1); 885 switch (l->llc_dsap) { 886 #ifdef NETATALK 887 case LLC_SNAP_LSAP: 888 switch (l->llc_control) { 889 case LLC_UI: 890 if (l->llc_ssap != LLC_SNAP_LSAP) { 891 goto dropanyway; 892 } 893 894 if (memcmp(&(l->llc_snap_org_code)[0], 895 at_org_code, sizeof(at_org_code)) == 0 && 896 ntohs(l->llc_snap_ether_type) == 897 ETHERTYPE_ATALK) { 898 inq = &atintrq2; 899 m_adj(m, sizeof(struct ether_header) 900 + sizeof(struct llc)); 901 isr = NETISR_ATALK; 902 break; 903 } 904 905 if (memcmp(&(l->llc_snap_org_code)[0], 906 aarp_org_code, 907 sizeof(aarp_org_code)) == 0 && 908 ntohs(l->llc_snap_ether_type) == 909 ETHERTYPE_AARP) { 910 m_adj( m, sizeof(struct ether_header) 911 + sizeof(struct llc)); 912 aarpinput(ifp, m); /* XXX */ 913 return; 914 } 915 916 default: 917 goto dropanyway; 918 } 919 break; 920 dropanyway: 921 #endif 922 default: 923 m_freem(m); 924 return; 925 } 926 #else /* ISO || LLC || NETATALK*/ 927 m_freem(m); 928 return; 929 #endif /* ISO || LLC || NETATALK*/ 930 } 931 932 if (__predict_true(pktq)) { 933 const uint32_t h = pktq_rps_hash(m); 934 if (__predict_false(!pktq_enqueue(pktq, m, h))) { 935 m_freem(m); 936 } 937 return; 938 } 939 940 if (__predict_false(!inq)) { 941 /* Should not happen. */ 942 m_freem(m); 943 return; 944 } 945 if (IF_QFULL(inq)) { 946 IF_DROP(inq); 947 m_freem(m); 948 } else { 949 IF_ENQUEUE(inq, m); 950 schednetisr(isr); 951 } 952 } 953 954 /* 955 * Convert Ethernet address to printable (loggable) representation. 956 */ 957 char * 958 ether_sprintf(const u_char *ap) 959 { 960 static char etherbuf[3 * ETHER_ADDR_LEN]; 961 return ether_snprintf(etherbuf, sizeof(etherbuf), ap); 962 } 963 964 char * 965 ether_snprintf(char *buf, size_t len, const u_char *ap) 966 { 967 char *cp = buf; 968 size_t i; 969 970 for (i = 0; i < len / 3; i++) { 971 *cp++ = hexdigits[*ap >> 4]; 972 *cp++ = hexdigits[*ap++ & 0xf]; 973 *cp++ = ':'; 974 } 975 *--cp = '\0'; 976 return buf; 977 } 978 979 /* 980 * Perform common duties while attaching to interface list 981 */ 982 void 983 ether_ifattach(struct ifnet *ifp, const uint8_t *lla) 984 { 985 struct ethercom *ec = (struct ethercom *)ifp; 986 987 ifp->if_type = IFT_ETHER; 988 ifp->if_hdrlen = ETHER_HDR_LEN; 989 ifp->if_dlt = DLT_EN10MB; 990 ifp->if_mtu = ETHERMTU; 991 ifp->if_output = ether_output; 992 ifp->if_input = ether_input; 993 if (ifp->if_baudrate == 0) 994 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 995 996 if_set_sadl(ifp, lla, ETHER_ADDR_LEN, !ETHER_IS_LOCAL(lla)); 997 998 LIST_INIT(&ec->ec_multiaddrs); 999 ifp->if_broadcastaddr = etherbroadcastaddr; 1000 bpf_attach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 1001 #ifdef MBUFTRACE 1002 strlcpy(ec->ec_tx_mowner.mo_name, ifp->if_xname, 1003 sizeof(ec->ec_tx_mowner.mo_name)); 1004 strlcpy(ec->ec_tx_mowner.mo_descr, "tx", 1005 sizeof(ec->ec_tx_mowner.mo_descr)); 1006 strlcpy(ec->ec_rx_mowner.mo_name, ifp->if_xname, 1007 sizeof(ec->ec_rx_mowner.mo_name)); 1008 strlcpy(ec->ec_rx_mowner.mo_descr, "rx", 1009 sizeof(ec->ec_rx_mowner.mo_descr)); 1010 MOWNER_ATTACH(&ec->ec_tx_mowner); 1011 MOWNER_ATTACH(&ec->ec_rx_mowner); 1012 ifp->if_mowner = &ec->ec_tx_mowner; 1013 #endif 1014 } 1015 1016 void 1017 ether_ifdetach(struct ifnet *ifp) 1018 { 1019 struct ethercom *ec = (void *) ifp; 1020 struct ether_multi *enm; 1021 int s; 1022 1023 /* 1024 * Prevent further calls to ioctl (for example turning off 1025 * promiscuous mode from the bridge code), which eventually can 1026 * call if_init() which can cause panics because the interface 1027 * is in the process of being detached. Return device not configured 1028 * instead. 1029 */ 1030 ifp->if_ioctl = (int (*)(struct ifnet *, u_long, void *))enxio; 1031 1032 #if NBRIDGE > 0 1033 if (ifp->if_bridge) 1034 bridge_ifdetach(ifp); 1035 #endif 1036 1037 bpf_detach(ifp); 1038 1039 #if NVLAN > 0 1040 if (ec->ec_nvlans) 1041 vlan_ifdetach(ifp); 1042 #endif 1043 1044 s = splnet(); 1045 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1046 LIST_REMOVE(enm, enm_list); 1047 free(enm, M_IFMADDR); 1048 ec->ec_multicnt--; 1049 } 1050 splx(s); 1051 1052 #if 0 /* done in if_detach() */ 1053 if_free_sadl(ifp); 1054 #endif 1055 1056 ifp->if_mowner = NULL; 1057 MOWNER_DETACH(&ec->ec_rx_mowner); 1058 MOWNER_DETACH(&ec->ec_tx_mowner); 1059 } 1060 1061 #if 0 1062 /* 1063 * This is for reference. We have a table-driven version 1064 * of the little-endian crc32 generator, which is faster 1065 * than the double-loop. 1066 */ 1067 uint32_t 1068 ether_crc32_le(const uint8_t *buf, size_t len) 1069 { 1070 uint32_t c, crc, carry; 1071 size_t i, j; 1072 1073 crc = 0xffffffffU; /* initial value */ 1074 1075 for (i = 0; i < len; i++) { 1076 c = buf[i]; 1077 for (j = 0; j < 8; j++) { 1078 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1079 crc >>= 1; 1080 c >>= 1; 1081 if (carry) 1082 crc = (crc ^ ETHER_CRC_POLY_LE); 1083 } 1084 } 1085 1086 return (crc); 1087 } 1088 #else 1089 uint32_t 1090 ether_crc32_le(const uint8_t *buf, size_t len) 1091 { 1092 static const uint32_t crctab[] = { 1093 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1094 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1095 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1096 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1097 }; 1098 uint32_t crc; 1099 size_t i; 1100 1101 crc = 0xffffffffU; /* initial value */ 1102 1103 for (i = 0; i < len; i++) { 1104 crc ^= buf[i]; 1105 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1106 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1107 } 1108 1109 return (crc); 1110 } 1111 #endif 1112 1113 uint32_t 1114 ether_crc32_be(const uint8_t *buf, size_t len) 1115 { 1116 uint32_t c, crc, carry; 1117 size_t i, j; 1118 1119 crc = 0xffffffffU; /* initial value */ 1120 1121 for (i = 0; i < len; i++) { 1122 c = buf[i]; 1123 for (j = 0; j < 8; j++) { 1124 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1125 crc <<= 1; 1126 c >>= 1; 1127 if (carry) 1128 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1129 } 1130 } 1131 1132 return (crc); 1133 } 1134 1135 #ifdef INET 1136 const uint8_t ether_ipmulticast_min[ETHER_ADDR_LEN] = 1137 { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1138 const uint8_t ether_ipmulticast_max[ETHER_ADDR_LEN] = 1139 { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1140 #endif 1141 #ifdef INET6 1142 const uint8_t ether_ip6multicast_min[ETHER_ADDR_LEN] = 1143 { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1144 const uint8_t ether_ip6multicast_max[ETHER_ADDR_LEN] = 1145 { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1146 #endif 1147 1148 /* 1149 * ether_aton implementation, not using a static buffer. 1150 */ 1151 int 1152 ether_aton_r(u_char *dest, size_t len, const char *str) 1153 { 1154 const u_char *cp = (const void *)str; 1155 u_char *ep; 1156 1157 #define atox(c) (((c) <= '9') ? ((c) - '0') : ((toupper(c) - 'A') + 10)) 1158 1159 if (len < ETHER_ADDR_LEN) 1160 return ENOSPC; 1161 1162 ep = dest + ETHER_ADDR_LEN; 1163 1164 while (*cp) { 1165 if (!isxdigit(*cp)) 1166 return EINVAL; 1167 *dest = atox(*cp); 1168 cp++; 1169 if (isxdigit(*cp)) { 1170 *dest = (*dest << 4) | atox(*cp); 1171 dest++; 1172 cp++; 1173 } else 1174 dest++; 1175 if (dest == ep) 1176 return *cp == '\0' ? 0 : ENAMETOOLONG; 1177 switch (*cp) { 1178 case ':': 1179 case '-': 1180 case '.': 1181 cp++; 1182 break; 1183 } 1184 } 1185 return ENOBUFS; 1186 } 1187 1188 /* 1189 * Convert a sockaddr into an Ethernet address or range of Ethernet 1190 * addresses. 1191 */ 1192 int 1193 ether_multiaddr(const struct sockaddr *sa, uint8_t addrlo[ETHER_ADDR_LEN], 1194 uint8_t addrhi[ETHER_ADDR_LEN]) 1195 { 1196 #ifdef INET 1197 const struct sockaddr_in *sin; 1198 #endif /* INET */ 1199 #ifdef INET6 1200 const struct sockaddr_in6 *sin6; 1201 #endif /* INET6 */ 1202 1203 switch (sa->sa_family) { 1204 1205 case AF_UNSPEC: 1206 memcpy(addrlo, sa->sa_data, ETHER_ADDR_LEN); 1207 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1208 break; 1209 1210 #ifdef INET 1211 case AF_INET: 1212 sin = satocsin(sa); 1213 if (sin->sin_addr.s_addr == INADDR_ANY) { 1214 /* 1215 * An IP address of INADDR_ANY means listen to 1216 * or stop listening to all of the Ethernet 1217 * multicast addresses used for IP. 1218 * (This is for the sake of IP multicast routers.) 1219 */ 1220 memcpy(addrlo, ether_ipmulticast_min, ETHER_ADDR_LEN); 1221 memcpy(addrhi, ether_ipmulticast_max, ETHER_ADDR_LEN); 1222 } 1223 else { 1224 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1225 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1226 } 1227 break; 1228 #endif 1229 #ifdef INET6 1230 case AF_INET6: 1231 sin6 = satocsin6(sa); 1232 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1233 /* 1234 * An IP6 address of 0 means listen to or stop 1235 * listening to all of the Ethernet multicast 1236 * address used for IP6. 1237 * (This is used for multicast routers.) 1238 */ 1239 memcpy(addrlo, ether_ip6multicast_min, ETHER_ADDR_LEN); 1240 memcpy(addrhi, ether_ip6multicast_max, ETHER_ADDR_LEN); 1241 } else { 1242 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1243 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1244 } 1245 break; 1246 #endif 1247 1248 default: 1249 return EAFNOSUPPORT; 1250 } 1251 return 0; 1252 } 1253 1254 /* 1255 * Add an Ethernet multicast address or range of addresses to the list for a 1256 * given interface. 1257 */ 1258 int 1259 ether_addmulti(const struct sockaddr *sa, struct ethercom *ec) 1260 { 1261 struct ether_multi *enm; 1262 u_char addrlo[ETHER_ADDR_LEN]; 1263 u_char addrhi[ETHER_ADDR_LEN]; 1264 int s = splnet(), error; 1265 1266 error = ether_multiaddr(sa, addrlo, addrhi); 1267 if (error != 0) { 1268 splx(s); 1269 return error; 1270 } 1271 1272 /* 1273 * Verify that we have valid Ethernet multicast addresses. 1274 */ 1275 if (!ETHER_IS_MULTICAST(addrlo) || !ETHER_IS_MULTICAST(addrhi)) { 1276 splx(s); 1277 return EINVAL; 1278 } 1279 /* 1280 * See if the address range is already in the list. 1281 */ 1282 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1283 if (enm != NULL) { 1284 /* 1285 * Found it; just increment the reference count. 1286 */ 1287 ++enm->enm_refcount; 1288 splx(s); 1289 return 0; 1290 } 1291 /* 1292 * New address or range; malloc a new multicast record 1293 * and link it into the interface's multicast list. 1294 */ 1295 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1296 if (enm == NULL) { 1297 splx(s); 1298 return ENOBUFS; 1299 } 1300 memcpy(enm->enm_addrlo, addrlo, 6); 1301 memcpy(enm->enm_addrhi, addrhi, 6); 1302 enm->enm_refcount = 1; 1303 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1304 ec->ec_multicnt++; 1305 splx(s); 1306 /* 1307 * Return ENETRESET to inform the driver that the list has changed 1308 * and its reception filter should be adjusted accordingly. 1309 */ 1310 return ENETRESET; 1311 } 1312 1313 /* 1314 * Delete a multicast address record. 1315 */ 1316 int 1317 ether_delmulti(const struct sockaddr *sa, struct ethercom *ec) 1318 { 1319 struct ether_multi *enm; 1320 u_char addrlo[ETHER_ADDR_LEN]; 1321 u_char addrhi[ETHER_ADDR_LEN]; 1322 int s = splnet(), error; 1323 1324 error = ether_multiaddr(sa, addrlo, addrhi); 1325 if (error != 0) { 1326 splx(s); 1327 return (error); 1328 } 1329 1330 /* 1331 * Look ur the address in our list. 1332 */ 1333 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1334 if (enm == NULL) { 1335 splx(s); 1336 return (ENXIO); 1337 } 1338 if (--enm->enm_refcount != 0) { 1339 /* 1340 * Still some claims to this record. 1341 */ 1342 splx(s); 1343 return (0); 1344 } 1345 /* 1346 * No remaining claims to this record; unlink and free it. 1347 */ 1348 LIST_REMOVE(enm, enm_list); 1349 free(enm, M_IFMADDR); 1350 ec->ec_multicnt--; 1351 splx(s); 1352 /* 1353 * Return ENETRESET to inform the driver that the list has changed 1354 * and its reception filter should be adjusted accordingly. 1355 */ 1356 return (ENETRESET); 1357 } 1358 1359 void 1360 ether_set_ifflags_cb(struct ethercom *ec, ether_cb_t cb) 1361 { 1362 ec->ec_ifflags_cb = cb; 1363 } 1364 1365 /* 1366 * Common ioctls for Ethernet interfaces. Note, we must be 1367 * called at splnet(). 1368 */ 1369 int 1370 ether_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1371 { 1372 struct ethercom *ec = (void *) ifp; 1373 struct eccapreq *eccr; 1374 struct ifreq *ifr = (struct ifreq *)data; 1375 struct if_laddrreq *iflr = data; 1376 const struct sockaddr_dl *sdl; 1377 static const uint8_t zero[ETHER_ADDR_LEN]; 1378 int error; 1379 1380 switch (cmd) { 1381 case SIOCINITIFADDR: 1382 { 1383 struct ifaddr *ifa = (struct ifaddr *)data; 1384 if (ifa->ifa_addr->sa_family != AF_LINK 1385 && (ifp->if_flags & (IFF_UP|IFF_RUNNING)) != 1386 (IFF_UP|IFF_RUNNING)) { 1387 ifp->if_flags |= IFF_UP; 1388 if ((error = (*ifp->if_init)(ifp)) != 0) 1389 return error; 1390 } 1391 #ifdef INET 1392 if (ifa->ifa_addr->sa_family == AF_INET) 1393 arp_ifinit(ifp, ifa); 1394 #endif /* INET */ 1395 return 0; 1396 } 1397 1398 case SIOCSIFMTU: 1399 { 1400 int maxmtu; 1401 1402 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1403 maxmtu = ETHERMTU_JUMBO; 1404 else 1405 maxmtu = ETHERMTU; 1406 1407 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1408 return EINVAL; 1409 else if ((error = ifioctl_common(ifp, cmd, data)) != ENETRESET) 1410 return error; 1411 else if (ifp->if_flags & IFF_UP) { 1412 /* Make sure the device notices the MTU change. */ 1413 return (*ifp->if_init)(ifp); 1414 } else 1415 return 0; 1416 } 1417 1418 case SIOCSIFFLAGS: 1419 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1420 return error; 1421 switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) { 1422 case IFF_RUNNING: 1423 /* 1424 * If interface is marked down and it is running, 1425 * then stop and disable it. 1426 */ 1427 (*ifp->if_stop)(ifp, 1); 1428 break; 1429 case IFF_UP: 1430 /* 1431 * If interface is marked up and it is stopped, then 1432 * start it. 1433 */ 1434 return (*ifp->if_init)(ifp); 1435 case IFF_UP|IFF_RUNNING: 1436 error = 0; 1437 if (ec->ec_ifflags_cb == NULL || 1438 (error = (*ec->ec_ifflags_cb)(ec)) == ENETRESET) { 1439 /* 1440 * Reset the interface to pick up 1441 * changes in any other flags that 1442 * affect the hardware state. 1443 */ 1444 return (*ifp->if_init)(ifp); 1445 } else 1446 return error; 1447 case 0: 1448 break; 1449 } 1450 return 0; 1451 case SIOCGETHERCAP: 1452 eccr = (struct eccapreq *)data; 1453 eccr->eccr_capabilities = ec->ec_capabilities; 1454 eccr->eccr_capenable = ec->ec_capenable; 1455 return 0; 1456 case SIOCADDMULTI: 1457 return ether_addmulti(ifreq_getaddr(cmd, ifr), ec); 1458 case SIOCDELMULTI: 1459 return ether_delmulti(ifreq_getaddr(cmd, ifr), ec); 1460 case SIOCSIFMEDIA: 1461 case SIOCGIFMEDIA: 1462 if (ec->ec_mii == NULL) 1463 return ENOTTY; 1464 return ifmedia_ioctl(ifp, ifr, &ec->ec_mii->mii_media, cmd); 1465 case SIOCALIFADDR: 1466 sdl = satocsdl(sstocsa(&iflr->addr)); 1467 if (sdl->sdl_family != AF_LINK) 1468 ; 1469 else if (ETHER_IS_MULTICAST(CLLADDR(sdl))) 1470 return EINVAL; 1471 else if (memcmp(zero, CLLADDR(sdl), sizeof(zero)) == 0) 1472 return EINVAL; 1473 /*FALLTHROUGH*/ 1474 default: 1475 return ifioctl_common(ifp, cmd, data); 1476 } 1477 return 0; 1478 } 1479 1480 static int 1481 ether_multicast_sysctl(SYSCTLFN_ARGS) 1482 { 1483 struct ether_multi *enm; 1484 struct ether_multi_sysctl addr; 1485 struct ifnet *ifp; 1486 struct ethercom *ec; 1487 int error; 1488 size_t written; 1489 1490 if (namelen != 1) 1491 return EINVAL; 1492 1493 ifp = if_byindex(name[0]); 1494 if (ifp == NULL) 1495 return ENODEV; 1496 if (ifp->if_type != IFT_ETHER) { 1497 *oldlenp = 0; 1498 return 0; 1499 } 1500 ec = (struct ethercom *)ifp; 1501 1502 if (oldp == NULL) { 1503 *oldlenp = ec->ec_multicnt * sizeof(addr); 1504 return 0; 1505 } 1506 1507 memset(&addr, 0, sizeof(addr)); 1508 error = 0; 1509 written = 0; 1510 1511 LIST_FOREACH(enm, &ec->ec_multiaddrs, enm_list) { 1512 if (written + sizeof(addr) > *oldlenp) 1513 break; 1514 addr.enm_refcount = enm->enm_refcount; 1515 memcpy(addr.enm_addrlo, enm->enm_addrlo, ETHER_ADDR_LEN); 1516 memcpy(addr.enm_addrhi, enm->enm_addrhi, ETHER_ADDR_LEN); 1517 error = sysctl_copyout(l, &addr, oldp, sizeof(addr)); 1518 if (error) 1519 break; 1520 written += sizeof(addr); 1521 oldp = (char *)oldp + sizeof(addr); 1522 } 1523 1524 *oldlenp = written; 1525 return error; 1526 } 1527 1528 SYSCTL_SETUP(sysctl_net_ether_setup, "sysctl net.ether subtree setup") 1529 { 1530 const struct sysctlnode *rnode = NULL; 1531 1532 sysctl_createv(clog, 0, NULL, &rnode, 1533 CTLFLAG_PERMANENT, 1534 CTLTYPE_NODE, "ether", 1535 SYSCTL_DESCR("Ethernet-specific information"), 1536 NULL, 0, NULL, 0, 1537 CTL_NET, CTL_CREATE, CTL_EOL); 1538 1539 sysctl_createv(clog, 0, &rnode, NULL, 1540 CTLFLAG_PERMANENT, 1541 CTLTYPE_NODE, "multicast", 1542 SYSCTL_DESCR("multicast addresses"), 1543 ether_multicast_sysctl, 0, NULL, 0, 1544 CTL_CREATE, CTL_EOL); 1545 } 1546 1547 void 1548 etherinit(void) 1549 { 1550 mutex_init(&bigpktpps_lock, MUTEX_DEFAULT, IPL_NET); 1551 } 1552
Indexes created Tue Sep 30 10:09:55 GMT 2025