if_ethersubr.c revision 1.203
1 /* $NetBSD: if_ethersubr.c,v 1.203 2014/07/28 14:24:48 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 1.203 2014/07/28 14:24:48 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 "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 96 #include <net/if.h> 97 #include <net/netisr.h> 98 #include <net/route.h> 99 #include <net/if_llc.h> 100 #include <net/if_dl.h> 101 #include <net/if_types.h> 102 103 #include <net/if_media.h> 104 #include <dev/mii/mii.h> 105 #include <dev/mii/miivar.h> 106 107 #if NARP == 0 108 /* 109 * XXX there should really be a way to issue this warning from within config(8) 110 */ 111 #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. 112 #endif 113 114 #include <net/bpf.h> 115 116 #include <net/if_ether.h> 117 #include <net/if_vlanvar.h> 118 119 #if NPPPOE > 0 120 #include <net/if_pppoe.h> 121 #endif 122 123 #if NAGR > 0 124 #include <net/agr/ieee8023_slowprotocols.h> /* XXX */ 125 #include <net/agr/ieee8023ad.h> 126 #include <net/agr/if_agrvar.h> 127 #endif 128 129 #if NBRIDGE > 0 130 #include <net/if_bridgevar.h> 131 #endif 132 133 #include <netinet/in.h> 134 #ifdef INET 135 #include <netinet/in_var.h> 136 #endif 137 #include <netinet/if_inarp.h> 138 139 #ifdef INET6 140 #ifndef INET 141 #include <netinet/in.h> 142 #endif 143 #include <netinet6/in6_var.h> 144 #include <netinet6/nd6.h> 145 #endif 146 147 148 #include "carp.h" 149 #if NCARP > 0 150 #include <netinet/ip_carp.h> 151 #endif 152 153 #ifdef IPX 154 #include <netipx/ipx.h> 155 #include <netipx/ipx_if.h> 156 #endif 157 158 #ifdef NETATALK 159 #include <netatalk/at.h> 160 #include <netatalk/at_var.h> 161 #include <netatalk/at_extern.h> 162 163 #define llc_snap_org_code llc_un.type_snap.org_code 164 #define llc_snap_ether_type llc_un.type_snap.ether_type 165 166 extern u_char at_org_code[3]; 167 extern u_char aarp_org_code[3]; 168 #endif /* NETATALK */ 169 170 #ifdef MPLS 171 #include <netmpls/mpls.h> 172 #include <netmpls/mpls_var.h> 173 #endif 174 175 static struct timeval bigpktppslim_last; 176 static int bigpktppslim = 2; /* XXX */ 177 static int bigpktpps_count; 178 static kmutex_t bigpktpps_lock __cacheline_aligned; 179 180 181 const uint8_t etherbroadcastaddr[ETHER_ADDR_LEN] = 182 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 183 const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] = 184 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 }; 185 #define senderr(e) { error = (e); goto bad;} 186 187 static int ether_output(struct ifnet *, struct mbuf *, 188 const struct sockaddr *, struct rtentry *); 189 190 /* 191 * Ethernet output routine. 192 * Encapsulate a packet of type family for the local net. 193 * Assumes that ifp is actually pointer to ethercom structure. 194 */ 195 static int 196 ether_output(struct ifnet * const ifp0, struct mbuf * const m0, 197 const struct sockaddr * const dst, 198 struct rtentry *rt0) 199 { 200 uint16_t etype = 0; 201 int error = 0, hdrcmplt = 0; 202 uint8_t esrc[6], edst[6]; 203 struct mbuf *m = m0; 204 struct rtentry *rt; 205 struct mbuf *mcopy = NULL; 206 struct ether_header *eh; 207 struct ifnet *ifp = ifp0; 208 ALTQ_DECL(struct altq_pktattr pktattr;) 209 #ifdef INET 210 struct arphdr *ah; 211 #endif /* INET */ 212 #ifdef NETATALK 213 struct at_ifaddr *aa; 214 #endif /* NETATALK */ 215 216 KASSERT(KERNEL_LOCKED_P()); 217 218 #ifdef MBUFTRACE 219 m_claimm(m, ifp->if_mowner); 220 #endif 221 222 #if NCARP > 0 223 if (ifp->if_type == IFT_CARP) { 224 struct ifaddr *ifa; 225 226 /* loop back if this is going to the carp interface */ 227 if (dst != NULL && ifp0->if_link_state == LINK_STATE_UP && 228 (ifa = ifa_ifwithaddr(dst)) != NULL && 229 ifa->ifa_ifp == ifp0) 230 return looutput(ifp0, m, dst, rt0); 231 232 ifp = ifp->if_carpdev; 233 /* ac = (struct arpcom *)ifp; */ 234 235 if ((ifp0->if_flags & (IFF_UP|IFF_RUNNING)) != 236 (IFF_UP|IFF_RUNNING)) 237 senderr(ENETDOWN); 238 } 239 #endif /* NCARP > 0 */ 240 241 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 242 senderr(ENETDOWN); 243 if ((rt = rt0) != NULL) { 244 if ((rt->rt_flags & RTF_UP) == 0) { 245 if ((rt0 = rt = rtalloc1(dst, 1)) != NULL) { 246 rt->rt_refcnt--; 247 if (rt->rt_ifp != ifp) 248 return (*rt->rt_ifp->if_output) 249 (ifp, m0, dst, rt); 250 } else 251 senderr(EHOSTUNREACH); 252 } 253 if ((rt->rt_flags & RTF_GATEWAY) && dst->sa_family != AF_NS) { 254 if (rt->rt_gwroute == NULL) 255 goto lookup; 256 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 257 rtfree(rt); rt = rt0; 258 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1); 259 if ((rt = rt->rt_gwroute) == NULL) 260 senderr(EHOSTUNREACH); 261 /* the "G" test below also prevents rt == rt0 */ 262 if ((rt->rt_flags & RTF_GATEWAY) || 263 (rt->rt_ifp != ifp)) { 264 rt->rt_refcnt--; 265 rt0->rt_gwroute = NULL; 266 senderr(EHOSTUNREACH); 267 } 268 } 269 } 270 if (rt->rt_flags & RTF_REJECT) 271 if (rt->rt_rmx.rmx_expire == 0 || 272 (u_long) time_second < rt->rt_rmx.rmx_expire) 273 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 274 } 275 276 switch (dst->sa_family) { 277 278 #ifdef INET 279 case AF_INET: 280 if (m->m_flags & M_BCAST) 281 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 282 else if (m->m_flags & M_MCAST) 283 ETHER_MAP_IP_MULTICAST(&satocsin(dst)->sin_addr, edst); 284 else if (!arpresolve(ifp, rt, m, dst, edst)) 285 return (0); /* if not yet resolved */ 286 /* If broadcasting on a simplex interface, loopback a copy */ 287 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 288 mcopy = m_copy(m, 0, (int)M_COPYALL); 289 etype = htons(ETHERTYPE_IP); 290 break; 291 292 case AF_ARP: 293 ah = mtod(m, struct arphdr *); 294 if (m->m_flags & M_BCAST) 295 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 296 else { 297 void *tha = ar_tha(ah); 298 299 if (tha == NULL) { 300 /* fake with ARPHDR_IEEE1394 */ 301 return 0; 302 } 303 memcpy(edst, tha, sizeof(edst)); 304 } 305 306 ah->ar_hrd = htons(ARPHRD_ETHER); 307 308 switch (ntohs(ah->ar_op)) { 309 case ARPOP_REVREQUEST: 310 case ARPOP_REVREPLY: 311 etype = htons(ETHERTYPE_REVARP); 312 break; 313 314 case ARPOP_REQUEST: 315 case ARPOP_REPLY: 316 default: 317 etype = htons(ETHERTYPE_ARP); 318 } 319 320 break; 321 #endif 322 #ifdef INET6 323 case AF_INET6: 324 if (!nd6_storelladdr(ifp, rt, m, dst, edst, sizeof(edst))){ 325 /* something bad happened */ 326 return (0); 327 } 328 etype = htons(ETHERTYPE_IPV6); 329 break; 330 #endif 331 #ifdef NETATALK 332 case AF_APPLETALK: 333 if (!aarpresolve(ifp, m, (const struct sockaddr_at *)dst, edst)) { 334 #ifdef NETATALKDEBUG 335 printf("aarpresolv failed\n"); 336 #endif /* NETATALKDEBUG */ 337 return (0); 338 } 339 /* 340 * ifaddr is the first thing in at_ifaddr 341 */ 342 aa = (struct at_ifaddr *) at_ifawithnet( 343 (const struct sockaddr_at *)dst, ifp); 344 if (aa == NULL) 345 goto bad; 346 347 /* 348 * In the phase 2 case, we need to prepend an mbuf for the 349 * llc header. Since we must preserve the value of m, 350 * which is passed to us by value, we m_copy() the first 351 * mbuf, and use it for our llc header. 352 */ 353 if (aa->aa_flags & AFA_PHASE2) { 354 struct llc llc; 355 356 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 357 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 358 llc.llc_control = LLC_UI; 359 memcpy(llc.llc_snap_org_code, at_org_code, 360 sizeof(llc.llc_snap_org_code)); 361 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 362 memcpy(mtod(m, void *), &llc, sizeof(struct llc)); 363 } else { 364 etype = htons(ETHERTYPE_ATALK); 365 } 366 break; 367 #endif /* NETATALK */ 368 #ifdef IPX 369 case AF_IPX: 370 etype = htons(ETHERTYPE_IPX); 371 memcpy(edst, 372 &(((const struct sockaddr_ipx *)dst)->sipx_addr.x_host), 373 sizeof(edst)); 374 /* If broadcasting on a simplex interface, loopback a copy */ 375 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 376 mcopy = m_copy(m, 0, (int)M_COPYALL); 377 break; 378 #endif 379 case pseudo_AF_HDRCMPLT: 380 hdrcmplt = 1; 381 memcpy(esrc, 382 ((const struct ether_header *)dst->sa_data)->ether_shost, 383 sizeof(esrc)); 384 /* FALLTHROUGH */ 385 386 case AF_UNSPEC: 387 memcpy(edst, 388 ((const struct ether_header *)dst->sa_data)->ether_dhost, 389 sizeof(edst)); 390 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 391 etype = ((const struct ether_header *)dst->sa_data)->ether_type; 392 break; 393 394 default: 395 printf("%s: can't handle af%d\n", ifp->if_xname, 396 dst->sa_family); 397 senderr(EAFNOSUPPORT); 398 } 399 400 #ifdef MPLS 401 if (rt0 != NULL && rt_gettag(rt0) != NULL && 402 rt_gettag(rt0)->sa_family == AF_MPLS && 403 (m->m_flags & (M_MCAST | M_BCAST)) == 0) { 404 union mpls_shim msh; 405 msh.s_addr = MPLS_GETSADDR(rt0); 406 if (msh.shim.label != MPLS_LABEL_IMPLNULL) 407 etype = htons(ETHERTYPE_MPLS); 408 } 409 #endif 410 411 if (mcopy) 412 (void)looutput(ifp, mcopy, dst, rt); 413 414 /* If no ether type is set, this must be a 802.2 formatted packet. 415 */ 416 if (etype == 0) 417 etype = htons(m->m_pkthdr.len); 418 /* 419 * Add local net header. If no space in first mbuf, 420 * allocate another. 421 */ 422 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 423 if (m == 0) 424 senderr(ENOBUFS); 425 eh = mtod(m, struct ether_header *); 426 /* Note: etype is already in network byte order. */ 427 (void)memcpy(&eh->ether_type, &etype, sizeof(eh->ether_type)); 428 memcpy(eh->ether_dhost, edst, sizeof(edst)); 429 if (hdrcmplt) 430 memcpy(eh->ether_shost, esrc, sizeof(eh->ether_shost)); 431 else 432 memcpy(eh->ether_shost, CLLADDR(ifp->if_sadl), 433 sizeof(eh->ether_shost)); 434 435 #if NCARP > 0 436 if (ifp0 != ifp && ifp0->if_type == IFT_CARP) { 437 memcpy(eh->ether_shost, CLLADDR(ifp0->if_sadl), 438 sizeof(eh->ether_shost)); 439 } 440 #endif /* NCARP > 0 */ 441 442 if ((error = pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 443 return (error); 444 if (m == NULL) 445 return (0); 446 447 #if NBRIDGE > 0 448 /* 449 * Bridges require special output handling. 450 */ 451 if (ifp->if_bridge) 452 return (bridge_output(ifp, m, NULL, NULL)); 453 #endif 454 455 #if NCARP > 0 456 if (ifp != ifp0) 457 ifp0->if_obytes += m->m_pkthdr.len + ETHER_HDR_LEN; 458 #endif /* NCARP > 0 */ 459 460 #ifdef ALTQ 461 /* 462 * If ALTQ is enabled on the parent interface, do 463 * classification; the queueing discipline might not 464 * require classification, but might require the 465 * address family/header pointer in the pktattr. 466 */ 467 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 468 altq_etherclassify(&ifp->if_snd, m, &pktattr); 469 #endif 470 return ifq_enqueue(ifp, m ALTQ_COMMA ALTQ_DECL(&pktattr)); 471 472 bad: 473 if (m) 474 m_freem(m); 475 return (error); 476 } 477 478 #ifdef ALTQ 479 /* 480 * This routine is a slight hack to allow a packet to be classified 481 * if the Ethernet headers are present. It will go away when ALTQ's 482 * classification engine understands link headers. 483 */ 484 void 485 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m, 486 struct altq_pktattr *pktattr) 487 { 488 struct ether_header *eh; 489 uint16_t ether_type; 490 int hlen, af, hdrsize; 491 void *hdr; 492 493 hlen = ETHER_HDR_LEN; 494 eh = mtod(m, struct ether_header *); 495 496 ether_type = htons(eh->ether_type); 497 498 if (ether_type < ETHERMTU) { 499 /* LLC/SNAP */ 500 struct llc *llc = (struct llc *)(eh + 1); 501 hlen += 8; 502 503 if (m->m_len < hlen || 504 llc->llc_dsap != LLC_SNAP_LSAP || 505 llc->llc_ssap != LLC_SNAP_LSAP || 506 llc->llc_control != LLC_UI) { 507 /* Not SNAP. */ 508 goto bad; 509 } 510 511 ether_type = htons(llc->llc_un.type_snap.ether_type); 512 } 513 514 switch (ether_type) { 515 case ETHERTYPE_IP: 516 af = AF_INET; 517 hdrsize = 20; /* sizeof(struct ip) */ 518 break; 519 520 case ETHERTYPE_IPV6: 521 af = AF_INET6; 522 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 523 break; 524 525 default: 526 af = AF_UNSPEC; 527 hdrsize = 0; 528 break; 529 } 530 531 while (m->m_len <= hlen) { 532 hlen -= m->m_len; 533 m = m->m_next; 534 } 535 if (m->m_len < (hlen + hdrsize)) { 536 /* 537 * protocol header not in a single mbuf. 538 * We can't cope with this situation right 539 * now (but it shouldn't ever happen, really, anyhow). 540 */ 541 #ifdef DEBUG 542 printf("altq_etherclassify: headers span multiple mbufs: " 543 "%d < %d\n", m->m_len, (hlen + hdrsize)); 544 #endif 545 goto bad; 546 } 547 548 m->m_data += hlen; 549 m->m_len -= hlen; 550 551 hdr = mtod(m, void *); 552 553 if (ALTQ_NEEDS_CLASSIFY(ifq)) 554 pktattr->pattr_class = 555 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 556 pktattr->pattr_af = af; 557 pktattr->pattr_hdr = hdr; 558 559 m->m_data -= hlen; 560 m->m_len += hlen; 561 562 return; 563 564 bad: 565 pktattr->pattr_class = NULL; 566 pktattr->pattr_hdr = NULL; 567 pktattr->pattr_af = AF_UNSPEC; 568 } 569 #endif /* ALTQ */ 570 571 /* 572 * Process a received Ethernet packet; 573 * the packet is in the mbuf chain m with 574 * the ether header. 575 */ 576 void 577 ether_input(struct ifnet *ifp, struct mbuf *m) 578 { 579 struct ethercom *ec = (struct ethercom *) ifp; 580 pktqueue_t *pktq = NULL; 581 struct ifqueue *inq = NULL; 582 uint16_t etype; 583 struct ether_header *eh; 584 size_t ehlen; 585 int isr = 0; 586 #if defined (LLC) || defined(NETATALK) 587 struct llc *l; 588 #endif 589 590 if ((ifp->if_flags & IFF_UP) == 0) { 591 m_freem(m); 592 return; 593 } 594 595 #ifdef MBUFTRACE 596 m_claimm(m, &ec->ec_rx_mowner); 597 #endif 598 eh = mtod(m, struct ether_header *); 599 etype = ntohs(eh->ether_type); 600 ehlen = sizeof(*eh); 601 602 /* 603 * Determine if the packet is within its size limits. 604 */ 605 if (etype != ETHERTYPE_MPLS && m->m_pkthdr.len > 606 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 607 mutex_enter(&bigpktpps_lock); 608 if (ppsratecheck(&bigpktppslim_last, &bigpktpps_count, 609 bigpktppslim)) { 610 printf("%s: discarding oversize frame (len=%d)\n", 611 ifp->if_xname, m->m_pkthdr.len); 612 } 613 mutex_exit(&bigpktpps_lock); 614 m_freem(m); 615 return; 616 } 617 618 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 619 /* 620 * If this is not a simplex interface, drop the packet 621 * if it came from us. 622 */ 623 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 624 memcmp(CLLADDR(ifp->if_sadl), eh->ether_shost, 625 ETHER_ADDR_LEN) == 0) { 626 m_freem(m); 627 return; 628 } 629 630 if (memcmp(etherbroadcastaddr, 631 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 632 m->m_flags |= M_BCAST; 633 else 634 m->m_flags |= M_MCAST; 635 ifp->if_imcasts++; 636 } 637 638 /* If the CRC is still on the packet, trim it off. */ 639 if (m->m_flags & M_HASFCS) { 640 m_adj(m, -ETHER_CRC_LEN); 641 m->m_flags &= ~M_HASFCS; 642 } 643 644 ifp->if_ibytes += m->m_pkthdr.len; 645 646 #if NCARP > 0 647 if (__predict_false(ifp->if_carp && ifp->if_type != IFT_CARP)) { 648 /* 649 * clear M_PROMISC, in case the packets comes from a 650 * vlan 651 */ 652 m->m_flags &= ~M_PROMISC; 653 if (carp_input(m, (uint8_t *)&eh->ether_shost, 654 (uint8_t *)&eh->ether_dhost, eh->ether_type) == 0) 655 return; 656 } 657 #endif /* NCARP > 0 */ 658 if ((m->m_flags & (M_BCAST|M_MCAST|M_PROMISC)) == 0 && 659 (ifp->if_flags & IFF_PROMISC) != 0 && 660 memcmp(CLLADDR(ifp->if_sadl), eh->ether_dhost, 661 ETHER_ADDR_LEN) != 0) { 662 m->m_flags |= M_PROMISC; 663 } 664 665 if ((m->m_flags & M_PROMISC) == 0) { 666 if (pfil_run_hooks(ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 667 return; 668 if (m == NULL) 669 return; 670 671 eh = mtod(m, struct ether_header *); 672 etype = ntohs(eh->ether_type); 673 ehlen = sizeof(*eh); 674 } 675 676 #if NAGR > 0 677 if (ifp->if_agrprivate && 678 __predict_true(etype != ETHERTYPE_SLOWPROTOCOLS)) { 679 m->m_flags &= ~M_PROMISC; 680 agr_input(ifp, m); 681 return; 682 } 683 #endif /* NAGR > 0 */ 684 685 /* 686 * If VLANs are configured on the interface, check to 687 * see if the device performed the decapsulation and 688 * provided us with the tag. 689 */ 690 if (ec->ec_nvlans && m_tag_find(m, PACKET_TAG_VLAN, NULL) != NULL) { 691 #if NVLAN > 0 692 /* 693 * vlan_input() will either recursively call ether_input() 694 * or drop the packet. 695 */ 696 vlan_input(ifp, m); 697 #else 698 m_freem(m); 699 #endif 700 return; 701 } 702 703 /* 704 * Handle protocols that expect to have the Ethernet header 705 * (and possibly FCS) intact. 706 */ 707 switch (etype) { 708 case ETHERTYPE_VLAN: { 709 struct ether_vlan_header *evl = (void *)eh; 710 /* 711 * If there is a tag of 0, then the VLAN header was probably 712 * just being used to store the priority. Extract the ether 713 * type, and if IP or IPV6, let them deal with it. 714 */ 715 if (m->m_len <= sizeof(*evl) 716 && EVL_VLANOFTAG(evl->evl_tag) == 0) { 717 etype = ntohs(evl->evl_proto); 718 ehlen = sizeof(*evl); 719 if ((m->m_flags & M_PROMISC) == 0 720 && (etype == ETHERTYPE_IP 721 || etype == ETHERTYPE_IPV6)) 722 break; 723 } 724 #if NVLAN > 0 725 /* 726 * vlan_input() will either recursively call ether_input() 727 * or drop the packet. 728 */ 729 if (((struct ethercom *)ifp)->ec_nvlans != 0) 730 vlan_input(ifp, m); 731 else 732 #endif /* NVLAN > 0 */ 733 m_freem(m); 734 return; 735 } 736 #if NPPPOE > 0 737 case ETHERTYPE_PPPOEDISC: 738 case ETHERTYPE_PPPOE: 739 if (m->m_flags & M_PROMISC) { 740 m_freem(m); 741 return; 742 } 743 #ifndef PPPOE_SERVER 744 if (m->m_flags & (M_MCAST | M_BCAST)) { 745 m_freem(m); 746 return; 747 } 748 #endif 749 750 if (etype == ETHERTYPE_PPPOEDISC) 751 inq = &ppoediscinq; 752 else 753 inq = &ppoeinq; 754 if (IF_QFULL(inq)) { 755 IF_DROP(inq); 756 m_freem(m); 757 } else { 758 IF_ENQUEUE(inq, m); 759 softint_schedule(pppoe_softintr); 760 } 761 return; 762 #endif /* NPPPOE > 0 */ 763 case ETHERTYPE_SLOWPROTOCOLS: { 764 uint8_t subtype; 765 766 #if defined(DIAGNOSTIC) 767 if (m->m_pkthdr.len < sizeof(*eh) + sizeof(subtype)) { 768 panic("ether_input: too short slow protocol packet"); 769 } 770 #endif 771 m_copydata(m, sizeof(*eh), sizeof(subtype), &subtype); 772 switch (subtype) { 773 #if NAGR > 0 774 case SLOWPROTOCOLS_SUBTYPE_LACP: 775 if (ifp->if_agrprivate) { 776 ieee8023ad_lacp_input(ifp, m); 777 return; 778 } 779 break; 780 781 case SLOWPROTOCOLS_SUBTYPE_MARKER: 782 if (ifp->if_agrprivate) { 783 ieee8023ad_marker_input(ifp, m); 784 return; 785 } 786 break; 787 #endif /* NAGR > 0 */ 788 default: 789 if (subtype == 0 || subtype > 10) { 790 /* illegal value */ 791 m_freem(m); 792 return; 793 } 794 /* unknown subtype */ 795 break; 796 } 797 /* FALLTHROUGH */ 798 } 799 default: 800 if (m->m_flags & M_PROMISC) { 801 m_freem(m); 802 return; 803 } 804 } 805 806 /* If the CRC is still on the packet, trim it off. */ 807 if (m->m_flags & M_HASFCS) { 808 m_adj(m, -ETHER_CRC_LEN); 809 m->m_flags &= ~M_HASFCS; 810 } 811 812 if (etype > ETHERMTU + sizeof (struct ether_header)) { 813 /* Strip off the Ethernet header. */ 814 m_adj(m, ehlen); 815 816 switch (etype) { 817 #ifdef INET 818 case ETHERTYPE_IP: 819 #ifdef GATEWAY 820 if (ipflow_fastforward(m)) 821 return; 822 #endif 823 pktq = ip_pktq; 824 break; 825 826 case ETHERTYPE_ARP: 827 isr = NETISR_ARP; 828 inq = &arpintrq; 829 break; 830 831 case ETHERTYPE_REVARP: 832 revarpinput(m); /* XXX queue? */ 833 return; 834 #endif 835 #ifdef INET6 836 case ETHERTYPE_IPV6: 837 if (__predict_false(!in6_present)) { 838 m_freem(m); 839 return; 840 } 841 #ifdef GATEWAY 842 if (ip6flow_fastforward(&m)) 843 return; 844 #endif 845 pktq = ip6_pktq; 846 break; 847 #endif 848 #ifdef IPX 849 case ETHERTYPE_IPX: 850 isr = NETISR_IPX; 851 inq = &ipxintrq; 852 break; 853 #endif 854 #ifdef NETATALK 855 case ETHERTYPE_ATALK: 856 isr = NETISR_ATALK; 857 inq = &atintrq1; 858 break; 859 case ETHERTYPE_AARP: 860 /* probably this should be done with a NETISR as well */ 861 aarpinput(ifp, m); /* XXX */ 862 return; 863 #endif /* NETATALK */ 864 #ifdef MPLS 865 case ETHERTYPE_MPLS: 866 isr = NETISR_MPLS; 867 inq = &mplsintrq; 868 break; 869 #endif 870 default: 871 m_freem(m); 872 return; 873 } 874 } else { 875 #if defined (LLC) || defined (NETATALK) 876 l = (struct llc *)(eh+1); 877 switch (l->llc_dsap) { 878 #ifdef NETATALK 879 case LLC_SNAP_LSAP: 880 switch (l->llc_control) { 881 case LLC_UI: 882 if (l->llc_ssap != LLC_SNAP_LSAP) { 883 goto dropanyway; 884 } 885 886 if (memcmp(&(l->llc_snap_org_code)[0], 887 at_org_code, sizeof(at_org_code)) == 0 && 888 ntohs(l->llc_snap_ether_type) == 889 ETHERTYPE_ATALK) { 890 inq = &atintrq2; 891 m_adj(m, sizeof(struct ether_header) 892 + sizeof(struct llc)); 893 isr = NETISR_ATALK; 894 break; 895 } 896 897 if (memcmp(&(l->llc_snap_org_code)[0], 898 aarp_org_code, 899 sizeof(aarp_org_code)) == 0 && 900 ntohs(l->llc_snap_ether_type) == 901 ETHERTYPE_AARP) { 902 m_adj( m, sizeof(struct ether_header) 903 + sizeof(struct llc)); 904 aarpinput(ifp, m); /* XXX */ 905 return; 906 } 907 908 default: 909 goto dropanyway; 910 } 911 break; 912 dropanyway: 913 #endif 914 default: 915 m_freem(m); 916 return; 917 } 918 #else /* ISO || LLC || NETATALK*/ 919 m_freem(m); 920 return; 921 #endif /* ISO || LLC || NETATALK*/ 922 } 923 924 if (__predict_true(pktq)) { 925 const uint32_t h = pktq_rps_hash(m); 926 if (__predict_false(!pktq_enqueue(pktq, m, h))) { 927 m_freem(m); 928 } 929 return; 930 } 931 932 if (__predict_false(!inq)) { 933 /* Should not happen. */ 934 m_freem(m); 935 return; 936 } 937 if (IF_QFULL(inq)) { 938 IF_DROP(inq); 939 m_freem(m); 940 } else { 941 IF_ENQUEUE(inq, m); 942 schednetisr(isr); 943 } 944 } 945 946 /* 947 * Convert Ethernet address to printable (loggable) representation. 948 */ 949 char * 950 ether_sprintf(const u_char *ap) 951 { 952 static char etherbuf[3 * ETHER_ADDR_LEN]; 953 return ether_snprintf(etherbuf, sizeof(etherbuf), ap); 954 } 955 956 char * 957 ether_snprintf(char *buf, size_t len, const u_char *ap) 958 { 959 char *cp = buf; 960 size_t i; 961 962 for (i = 0; i < len / 3; i++) { 963 *cp++ = hexdigits[*ap >> 4]; 964 *cp++ = hexdigits[*ap++ & 0xf]; 965 *cp++ = ':'; 966 } 967 *--cp = '\0'; 968 return buf; 969 } 970 971 /* 972 * Perform common duties while attaching to interface list 973 */ 974 void 975 ether_ifattach(struct ifnet *ifp, const uint8_t *lla) 976 { 977 struct ethercom *ec = (struct ethercom *)ifp; 978 979 ifp->if_type = IFT_ETHER; 980 ifp->if_hdrlen = ETHER_HDR_LEN; 981 ifp->if_dlt = DLT_EN10MB; 982 ifp->if_mtu = ETHERMTU; 983 ifp->if_output = ether_output; 984 ifp->if_input = ether_input; 985 if (ifp->if_baudrate == 0) 986 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 987 988 if_set_sadl(ifp, lla, ETHER_ADDR_LEN, !ETHER_IS_LOCAL(lla)); 989 990 LIST_INIT(&ec->ec_multiaddrs); 991 ifp->if_broadcastaddr = etherbroadcastaddr; 992 bpf_attach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 993 #ifdef MBUFTRACE 994 strlcpy(ec->ec_tx_mowner.mo_name, ifp->if_xname, 995 sizeof(ec->ec_tx_mowner.mo_name)); 996 strlcpy(ec->ec_tx_mowner.mo_descr, "tx", 997 sizeof(ec->ec_tx_mowner.mo_descr)); 998 strlcpy(ec->ec_rx_mowner.mo_name, ifp->if_xname, 999 sizeof(ec->ec_rx_mowner.mo_name)); 1000 strlcpy(ec->ec_rx_mowner.mo_descr, "rx", 1001 sizeof(ec->ec_rx_mowner.mo_descr)); 1002 MOWNER_ATTACH(&ec->ec_tx_mowner); 1003 MOWNER_ATTACH(&ec->ec_rx_mowner); 1004 ifp->if_mowner = &ec->ec_tx_mowner; 1005 #endif 1006 } 1007 1008 void 1009 ether_ifdetach(struct ifnet *ifp) 1010 { 1011 struct ethercom *ec = (void *) ifp; 1012 struct ether_multi *enm; 1013 int s; 1014 1015 /* 1016 * Prevent further calls to ioctl (for example turning off 1017 * promiscuous mode from the bridge code), which eventually can 1018 * call if_init() which can cause panics because the interface 1019 * is in the process of being detached. Return device not configured 1020 * instead. 1021 */ 1022 ifp->if_ioctl = (int (*)(struct ifnet *, u_long, void *))enxio; 1023 1024 #if NBRIDGE > 0 1025 if (ifp->if_bridge) 1026 bridge_ifdetach(ifp); 1027 #endif 1028 1029 bpf_detach(ifp); 1030 1031 #if NVLAN > 0 1032 if (ec->ec_nvlans) 1033 vlan_ifdetach(ifp); 1034 #endif 1035 1036 s = splnet(); 1037 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1038 LIST_REMOVE(enm, enm_list); 1039 free(enm, M_IFMADDR); 1040 ec->ec_multicnt--; 1041 } 1042 splx(s); 1043 1044 #if 0 /* done in if_detach() */ 1045 if_free_sadl(ifp); 1046 #endif 1047 1048 ifp->if_mowner = NULL; 1049 MOWNER_DETACH(&ec->ec_rx_mowner); 1050 MOWNER_DETACH(&ec->ec_tx_mowner); 1051 } 1052 1053 #if 0 1054 /* 1055 * This is for reference. We have a table-driven version 1056 * of the little-endian crc32 generator, which is faster 1057 * than the double-loop. 1058 */ 1059 uint32_t 1060 ether_crc32_le(const uint8_t *buf, size_t len) 1061 { 1062 uint32_t c, crc, carry; 1063 size_t i, j; 1064 1065 crc = 0xffffffffU; /* initial value */ 1066 1067 for (i = 0; i < len; i++) { 1068 c = buf[i]; 1069 for (j = 0; j < 8; j++) { 1070 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1071 crc >>= 1; 1072 c >>= 1; 1073 if (carry) 1074 crc = (crc ^ ETHER_CRC_POLY_LE); 1075 } 1076 } 1077 1078 return (crc); 1079 } 1080 #else 1081 uint32_t 1082 ether_crc32_le(const uint8_t *buf, size_t len) 1083 { 1084 static const uint32_t crctab[] = { 1085 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1086 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1087 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1088 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1089 }; 1090 uint32_t crc; 1091 size_t i; 1092 1093 crc = 0xffffffffU; /* initial value */ 1094 1095 for (i = 0; i < len; i++) { 1096 crc ^= buf[i]; 1097 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1098 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1099 } 1100 1101 return (crc); 1102 } 1103 #endif 1104 1105 uint32_t 1106 ether_crc32_be(const uint8_t *buf, size_t len) 1107 { 1108 uint32_t c, crc, carry; 1109 size_t i, j; 1110 1111 crc = 0xffffffffU; /* initial value */ 1112 1113 for (i = 0; i < len; i++) { 1114 c = buf[i]; 1115 for (j = 0; j < 8; j++) { 1116 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1117 crc <<= 1; 1118 c >>= 1; 1119 if (carry) 1120 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1121 } 1122 } 1123 1124 return (crc); 1125 } 1126 1127 #ifdef INET 1128 const uint8_t ether_ipmulticast_min[ETHER_ADDR_LEN] = 1129 { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1130 const uint8_t ether_ipmulticast_max[ETHER_ADDR_LEN] = 1131 { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1132 #endif 1133 #ifdef INET6 1134 const uint8_t ether_ip6multicast_min[ETHER_ADDR_LEN] = 1135 { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1136 const uint8_t ether_ip6multicast_max[ETHER_ADDR_LEN] = 1137 { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1138 #endif 1139 1140 /* 1141 * ether_aton implementation, not using a static buffer. 1142 */ 1143 int 1144 ether_aton_r(u_char *dest, size_t len, const char *str) 1145 { 1146 const u_char *cp = (const void *)str; 1147 u_char *ep; 1148 1149 #define atox(c) (((c) <= '9') ? ((c) - '0') : ((toupper(c) - 'A') + 10)) 1150 1151 if (len < ETHER_ADDR_LEN) 1152 return ENOSPC; 1153 1154 ep = dest + ETHER_ADDR_LEN; 1155 1156 while (*cp) { 1157 if (!isxdigit(*cp)) 1158 return EINVAL; 1159 *dest = atox(*cp); 1160 cp++; 1161 if (isxdigit(*cp)) { 1162 *dest = (*dest << 4) | atox(*cp); 1163 dest++; 1164 cp++; 1165 } else 1166 dest++; 1167 if (dest == ep) 1168 return *cp == '\0' ? 0 : ENAMETOOLONG; 1169 switch (*cp) { 1170 case ':': 1171 case '-': 1172 case '.': 1173 cp++; 1174 break; 1175 } 1176 } 1177 return ENOBUFS; 1178 } 1179 1180 /* 1181 * Convert a sockaddr into an Ethernet address or range of Ethernet 1182 * addresses. 1183 */ 1184 int 1185 ether_multiaddr(const struct sockaddr *sa, uint8_t addrlo[ETHER_ADDR_LEN], 1186 uint8_t addrhi[ETHER_ADDR_LEN]) 1187 { 1188 #ifdef INET 1189 const struct sockaddr_in *sin; 1190 #endif /* INET */ 1191 #ifdef INET6 1192 const struct sockaddr_in6 *sin6; 1193 #endif /* INET6 */ 1194 1195 switch (sa->sa_family) { 1196 1197 case AF_UNSPEC: 1198 memcpy(addrlo, sa->sa_data, ETHER_ADDR_LEN); 1199 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1200 break; 1201 1202 #ifdef INET 1203 case AF_INET: 1204 sin = satocsin(sa); 1205 if (sin->sin_addr.s_addr == INADDR_ANY) { 1206 /* 1207 * An IP address of INADDR_ANY means listen to 1208 * or stop listening to all of the Ethernet 1209 * multicast addresses used for IP. 1210 * (This is for the sake of IP multicast routers.) 1211 */ 1212 memcpy(addrlo, ether_ipmulticast_min, ETHER_ADDR_LEN); 1213 memcpy(addrhi, ether_ipmulticast_max, ETHER_ADDR_LEN); 1214 } 1215 else { 1216 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1217 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1218 } 1219 break; 1220 #endif 1221 #ifdef INET6 1222 case AF_INET6: 1223 sin6 = satocsin6(sa); 1224 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1225 /* 1226 * An IP6 address of 0 means listen to or stop 1227 * listening to all of the Ethernet multicast 1228 * address used for IP6. 1229 * (This is used for multicast routers.) 1230 */ 1231 memcpy(addrlo, ether_ip6multicast_min, ETHER_ADDR_LEN); 1232 memcpy(addrhi, ether_ip6multicast_max, ETHER_ADDR_LEN); 1233 } else { 1234 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1235 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1236 } 1237 break; 1238 #endif 1239 1240 default: 1241 return EAFNOSUPPORT; 1242 } 1243 return 0; 1244 } 1245 1246 /* 1247 * Add an Ethernet multicast address or range of addresses to the list for a 1248 * given interface. 1249 */ 1250 int 1251 ether_addmulti(const struct sockaddr *sa, struct ethercom *ec) 1252 { 1253 struct ether_multi *enm; 1254 u_char addrlo[ETHER_ADDR_LEN]; 1255 u_char addrhi[ETHER_ADDR_LEN]; 1256 int s = splnet(), error; 1257 1258 error = ether_multiaddr(sa, addrlo, addrhi); 1259 if (error != 0) { 1260 splx(s); 1261 return error; 1262 } 1263 1264 /* 1265 * Verify that we have valid Ethernet multicast addresses. 1266 */ 1267 if (!ETHER_IS_MULTICAST(addrlo) || !ETHER_IS_MULTICAST(addrhi)) { 1268 splx(s); 1269 return EINVAL; 1270 } 1271 /* 1272 * See if the address range is already in the list. 1273 */ 1274 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1275 if (enm != NULL) { 1276 /* 1277 * Found it; just increment the reference count. 1278 */ 1279 ++enm->enm_refcount; 1280 splx(s); 1281 return 0; 1282 } 1283 /* 1284 * New address or range; malloc a new multicast record 1285 * and link it into the interface's multicast list. 1286 */ 1287 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1288 if (enm == NULL) { 1289 splx(s); 1290 return ENOBUFS; 1291 } 1292 memcpy(enm->enm_addrlo, addrlo, 6); 1293 memcpy(enm->enm_addrhi, addrhi, 6); 1294 enm->enm_refcount = 1; 1295 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1296 ec->ec_multicnt++; 1297 splx(s); 1298 /* 1299 * Return ENETRESET to inform the driver that the list has changed 1300 * and its reception filter should be adjusted accordingly. 1301 */ 1302 return ENETRESET; 1303 } 1304 1305 /* 1306 * Delete a multicast address record. 1307 */ 1308 int 1309 ether_delmulti(const struct sockaddr *sa, struct ethercom *ec) 1310 { 1311 struct ether_multi *enm; 1312 u_char addrlo[ETHER_ADDR_LEN]; 1313 u_char addrhi[ETHER_ADDR_LEN]; 1314 int s = splnet(), error; 1315 1316 error = ether_multiaddr(sa, addrlo, addrhi); 1317 if (error != 0) { 1318 splx(s); 1319 return (error); 1320 } 1321 1322 /* 1323 * Look ur the address in our list. 1324 */ 1325 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1326 if (enm == NULL) { 1327 splx(s); 1328 return (ENXIO); 1329 } 1330 if (--enm->enm_refcount != 0) { 1331 /* 1332 * Still some claims to this record. 1333 */ 1334 splx(s); 1335 return (0); 1336 } 1337 /* 1338 * No remaining claims to this record; unlink and free it. 1339 */ 1340 LIST_REMOVE(enm, enm_list); 1341 free(enm, M_IFMADDR); 1342 ec->ec_multicnt--; 1343 splx(s); 1344 /* 1345 * Return ENETRESET to inform the driver that the list has changed 1346 * and its reception filter should be adjusted accordingly. 1347 */ 1348 return (ENETRESET); 1349 } 1350 1351 void 1352 ether_set_ifflags_cb(struct ethercom *ec, ether_cb_t cb) 1353 { 1354 ec->ec_ifflags_cb = cb; 1355 } 1356 1357 /* 1358 * Common ioctls for Ethernet interfaces. Note, we must be 1359 * called at splnet(). 1360 */ 1361 int 1362 ether_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1363 { 1364 struct ethercom *ec = (void *) ifp; 1365 struct eccapreq *eccr; 1366 struct ifreq *ifr = (struct ifreq *)data; 1367 struct if_laddrreq *iflr = data; 1368 const struct sockaddr_dl *sdl; 1369 static const uint8_t zero[ETHER_ADDR_LEN]; 1370 int error; 1371 1372 switch (cmd) { 1373 case SIOCINITIFADDR: 1374 { 1375 struct ifaddr *ifa = (struct ifaddr *)data; 1376 if (ifa->ifa_addr->sa_family != AF_LINK 1377 && (ifp->if_flags & (IFF_UP|IFF_RUNNING)) != 1378 (IFF_UP|IFF_RUNNING)) { 1379 ifp->if_flags |= IFF_UP; 1380 if ((error = (*ifp->if_init)(ifp)) != 0) 1381 return error; 1382 } 1383 #ifdef INET 1384 if (ifa->ifa_addr->sa_family == AF_INET) 1385 arp_ifinit(ifp, ifa); 1386 #endif /* INET */ 1387 return 0; 1388 } 1389 1390 case SIOCSIFMTU: 1391 { 1392 int maxmtu; 1393 1394 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1395 maxmtu = ETHERMTU_JUMBO; 1396 else 1397 maxmtu = ETHERMTU; 1398 1399 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1400 return EINVAL; 1401 else if ((error = ifioctl_common(ifp, cmd, data)) != ENETRESET) 1402 return error; 1403 else if (ifp->if_flags & IFF_UP) { 1404 /* Make sure the device notices the MTU change. */ 1405 return (*ifp->if_init)(ifp); 1406 } else 1407 return 0; 1408 } 1409 1410 case SIOCSIFFLAGS: 1411 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1412 return error; 1413 switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) { 1414 case IFF_RUNNING: 1415 /* 1416 * If interface is marked down and it is running, 1417 * then stop and disable it. 1418 */ 1419 (*ifp->if_stop)(ifp, 1); 1420 break; 1421 case IFF_UP: 1422 /* 1423 * If interface is marked up and it is stopped, then 1424 * start it. 1425 */ 1426 return (*ifp->if_init)(ifp); 1427 case IFF_UP|IFF_RUNNING: 1428 error = 0; 1429 if (ec->ec_ifflags_cb == NULL || 1430 (error = (*ec->ec_ifflags_cb)(ec)) == ENETRESET) { 1431 /* 1432 * Reset the interface to pick up 1433 * changes in any other flags that 1434 * affect the hardware state. 1435 */ 1436 return (*ifp->if_init)(ifp); 1437 } else 1438 return error; 1439 case 0: 1440 break; 1441 } 1442 return 0; 1443 case SIOCGETHERCAP: 1444 eccr = (struct eccapreq *)data; 1445 eccr->eccr_capabilities = ec->ec_capabilities; 1446 eccr->eccr_capenable = ec->ec_capenable; 1447 return 0; 1448 case SIOCADDMULTI: 1449 return ether_addmulti(ifreq_getaddr(cmd, ifr), ec); 1450 case SIOCDELMULTI: 1451 return ether_delmulti(ifreq_getaddr(cmd, ifr), ec); 1452 case SIOCSIFMEDIA: 1453 case SIOCGIFMEDIA: 1454 if (ec->ec_mii == NULL) 1455 return ENOTTY; 1456 return ifmedia_ioctl(ifp, ifr, &ec->ec_mii->mii_media, cmd); 1457 case SIOCALIFADDR: 1458 sdl = satocsdl(sstocsa(&iflr->addr)); 1459 if (sdl->sdl_family != AF_LINK) 1460 ; 1461 else if (ETHER_IS_MULTICAST(CLLADDR(sdl))) 1462 return EINVAL; 1463 else if (memcmp(zero, CLLADDR(sdl), sizeof(zero)) == 0) 1464 return EINVAL; 1465 /*FALLTHROUGH*/ 1466 default: 1467 return ifioctl_common(ifp, cmd, data); 1468 } 1469 return 0; 1470 } 1471 1472 static int 1473 ether_multicast_sysctl(SYSCTLFN_ARGS) 1474 { 1475 struct ether_multi *enm; 1476 struct ether_multi_sysctl addr; 1477 struct ifnet *ifp; 1478 struct ethercom *ec; 1479 int error; 1480 size_t written; 1481 1482 if (namelen != 1) 1483 return EINVAL; 1484 1485 ifp = if_byindex(name[0]); 1486 if (ifp == NULL) 1487 return ENODEV; 1488 if (ifp->if_type != IFT_ETHER) { 1489 *oldlenp = 0; 1490 return 0; 1491 } 1492 ec = (struct ethercom *)ifp; 1493 1494 if (oldp == NULL) { 1495 *oldlenp = ec->ec_multicnt * sizeof(addr); 1496 return 0; 1497 } 1498 1499 memset(&addr, 0, sizeof(addr)); 1500 error = 0; 1501 written = 0; 1502 1503 LIST_FOREACH(enm, &ec->ec_multiaddrs, enm_list) { 1504 if (written + sizeof(addr) > *oldlenp) 1505 break; 1506 addr.enm_refcount = enm->enm_refcount; 1507 memcpy(addr.enm_addrlo, enm->enm_addrlo, ETHER_ADDR_LEN); 1508 memcpy(addr.enm_addrhi, enm->enm_addrhi, ETHER_ADDR_LEN); 1509 error = sysctl_copyout(l, &addr, oldp, sizeof(addr)); 1510 if (error) 1511 break; 1512 written += sizeof(addr); 1513 oldp = (char *)oldp + sizeof(addr); 1514 } 1515 1516 *oldlenp = written; 1517 return error; 1518 } 1519 1520 SYSCTL_SETUP(sysctl_net_ether_setup, "sysctl net.ether subtree setup") 1521 { 1522 const struct sysctlnode *rnode = NULL; 1523 1524 sysctl_createv(clog, 0, NULL, &rnode, 1525 CTLFLAG_PERMANENT, 1526 CTLTYPE_NODE, "ether", 1527 SYSCTL_DESCR("Ethernet-specific information"), 1528 NULL, 0, NULL, 0, 1529 CTL_NET, CTL_CREATE, CTL_EOL); 1530 1531 sysctl_createv(clog, 0, &rnode, NULL, 1532 CTLFLAG_PERMANENT, 1533 CTLTYPE_NODE, "multicast", 1534 SYSCTL_DESCR("multicast addresses"), 1535 ether_multicast_sysctl, 0, NULL, 0, 1536 CTL_CREATE, CTL_EOL); 1537 } 1538 1539 void 1540 etherinit(void) 1541 { 1542 mutex_init(&bigpktpps_lock, MUTEX_DEFAULT, IPL_NET); 1543 } 1544
Indexes created Mon Sep 22 10:09:38 GMT 2025