if_ethersubr.c revision 1.179
1 /* $NetBSD: if_ethersubr.c,v 1.179 2010/05/19 18:58:22 jakllsch 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 1.179 2010/05/19 18:58:22 jakllsch Exp $"); 65 66 #include "opt_inet.h" 67 #include "opt_atalk.h" 68 #include "opt_iso.h" 69 #include "opt_ipx.h" 70 #include "opt_mbuftrace.h" 71 #include "opt_gateway.h" 72 #include "opt_pfil_hooks.h" 73 #include "opt_pppoe.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/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 #if NVLAN > 0 118 #include <net/if_vlanvar.h> 119 #endif 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 ISO 161 #include <netiso/argo_debug.h> 162 #include <netiso/iso.h> 163 #include <netiso/iso_var.h> 164 #include <netiso/iso_snpac.h> 165 #endif 166 167 168 169 #ifdef NETATALK 170 #include <netatalk/at.h> 171 #include <netatalk/at_var.h> 172 #include <netatalk/at_extern.h> 173 174 #define llc_snap_org_code llc_un.type_snap.org_code 175 #define llc_snap_ether_type llc_un.type_snap.ether_type 176 177 extern u_char at_org_code[3]; 178 extern u_char aarp_org_code[3]; 179 #endif /* NETATALK */ 180 181 static struct timeval bigpktppslim_last; 182 static int bigpktppslim = 2; /* XXX */ 183 static int bigpktpps_count; 184 185 186 const uint8_t etherbroadcastaddr[ETHER_ADDR_LEN] = 187 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 188 const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] = 189 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 }; 190 #define senderr(e) { error = (e); goto bad;} 191 192 static int ether_output(struct ifnet *, struct mbuf *, 193 const struct sockaddr *, struct rtentry *); 194 195 /* 196 * Ethernet output routine. 197 * Encapsulate a packet of type family for the local net. 198 * Assumes that ifp is actually pointer to ethercom structure. 199 */ 200 static int 201 ether_output(struct ifnet * const ifp0, struct mbuf * const m0, 202 const struct sockaddr * const dst, 203 struct rtentry *rt0) 204 { 205 uint16_t etype = 0; 206 int error = 0, hdrcmplt = 0; 207 uint8_t esrc[6], edst[6]; 208 struct mbuf *m = m0; 209 struct rtentry *rt; 210 struct mbuf *mcopy = NULL; 211 struct ether_header *eh; 212 struct ifnet *ifp = ifp0; 213 ALTQ_DECL(struct altq_pktattr pktattr;) 214 #ifdef INET 215 struct arphdr *ah; 216 #endif /* INET */ 217 #ifdef NETATALK 218 struct at_ifaddr *aa; 219 #endif /* NETATALK */ 220 221 #ifdef MBUFTRACE 222 m_claimm(m, ifp->if_mowner); 223 #endif 224 225 #if NCARP > 0 226 if (ifp->if_type == IFT_CARP) { 227 struct ifaddr *ifa; 228 229 /* loop back if this is going to the carp interface */ 230 if (dst != NULL && ifp0->if_link_state == LINK_STATE_UP && 231 (ifa = ifa_ifwithaddr(dst)) != NULL && 232 ifa->ifa_ifp == ifp0) 233 return looutput(ifp0, m, dst, rt0); 234 235 ifp = ifp->if_carpdev; 236 /* ac = (struct arpcom *)ifp; */ 237 238 if ((ifp0->if_flags & (IFF_UP|IFF_RUNNING)) != 239 (IFF_UP|IFF_RUNNING)) 240 senderr(ENETDOWN); 241 } 242 #endif /* NCARP > 0 */ 243 244 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 245 senderr(ENETDOWN); 246 if ((rt = rt0) != NULL) { 247 if ((rt->rt_flags & RTF_UP) == 0) { 248 if ((rt0 = rt = rtalloc1(dst, 1)) != NULL) { 249 rt->rt_refcnt--; 250 if (rt->rt_ifp != ifp) 251 return (*rt->rt_ifp->if_output) 252 (ifp, m0, dst, rt); 253 } else 254 senderr(EHOSTUNREACH); 255 } 256 if ((rt->rt_flags & RTF_GATEWAY) && dst->sa_family != AF_NS) { 257 if (rt->rt_gwroute == NULL) 258 goto lookup; 259 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 260 rtfree(rt); rt = rt0; 261 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1); 262 if ((rt = rt->rt_gwroute) == NULL) 263 senderr(EHOSTUNREACH); 264 /* the "G" test below also prevents rt == rt0 */ 265 if ((rt->rt_flags & RTF_GATEWAY) || 266 (rt->rt_ifp != ifp)) { 267 rt->rt_refcnt--; 268 rt0->rt_gwroute = NULL; 269 senderr(EHOSTUNREACH); 270 } 271 } 272 } 273 if (rt->rt_flags & RTF_REJECT) 274 if (rt->rt_rmx.rmx_expire == 0 || 275 (u_long) time_second < rt->rt_rmx.rmx_expire) 276 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 277 } 278 279 switch (dst->sa_family) { 280 281 #ifdef INET 282 case AF_INET: 283 if (m->m_flags & M_BCAST) 284 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 285 else if (m->m_flags & M_MCAST) 286 ETHER_MAP_IP_MULTICAST(&satocsin(dst)->sin_addr, edst); 287 else if (!arpresolve(ifp, rt, m, dst, edst)) 288 return (0); /* if not yet resolved */ 289 /* If broadcasting on a simplex interface, loopback a copy */ 290 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 291 mcopy = m_copy(m, 0, (int)M_COPYALL); 292 etype = htons(ETHERTYPE_IP); 293 break; 294 295 case AF_ARP: 296 ah = mtod(m, struct arphdr *); 297 if (m->m_flags & M_BCAST) 298 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 299 else { 300 void *tha = ar_tha(ah); 301 302 if (tha == NULL) { 303 /* fake with ARPHDR_IEEE1394 */ 304 return 0; 305 } 306 memcpy(edst, tha, sizeof(edst)); 307 } 308 309 ah->ar_hrd = htons(ARPHRD_ETHER); 310 311 switch (ntohs(ah->ar_op)) { 312 case ARPOP_REVREQUEST: 313 case ARPOP_REVREPLY: 314 etype = htons(ETHERTYPE_REVARP); 315 break; 316 317 case ARPOP_REQUEST: 318 case ARPOP_REPLY: 319 default: 320 etype = htons(ETHERTYPE_ARP); 321 } 322 323 break; 324 #endif 325 #ifdef INET6 326 case AF_INET6: 327 if (!nd6_storelladdr(ifp, rt, m, dst, edst, sizeof(edst))){ 328 /* something bad happened */ 329 return (0); 330 } 331 etype = htons(ETHERTYPE_IPV6); 332 break; 333 #endif 334 #ifdef NETATALK 335 case AF_APPLETALK: 336 if (!aarpresolve(ifp, m, (const struct sockaddr_at *)dst, edst)) { 337 #ifdef NETATALKDEBUG 338 printf("aarpresolv failed\n"); 339 #endif /* NETATALKDEBUG */ 340 return (0); 341 } 342 /* 343 * ifaddr is the first thing in at_ifaddr 344 */ 345 aa = (struct at_ifaddr *) at_ifawithnet( 346 (const struct sockaddr_at *)dst, ifp); 347 if (aa == NULL) 348 goto bad; 349 350 /* 351 * In the phase 2 case, we need to prepend an mbuf for the 352 * llc header. Since we must preserve the value of m, 353 * which is passed to us by value, we m_copy() the first 354 * mbuf, and use it for our llc header. 355 */ 356 if (aa->aa_flags & AFA_PHASE2) { 357 struct llc llc; 358 359 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 360 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 361 llc.llc_control = LLC_UI; 362 memcpy(llc.llc_snap_org_code, at_org_code, 363 sizeof(llc.llc_snap_org_code)); 364 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 365 memcpy(mtod(m, void *), &llc, sizeof(struct llc)); 366 } else { 367 etype = htons(ETHERTYPE_ATALK); 368 } 369 break; 370 #endif /* NETATALK */ 371 #ifdef IPX 372 case AF_IPX: 373 etype = htons(ETHERTYPE_IPX); 374 memcpy(edst, 375 &(((const struct sockaddr_ipx *)dst)->sipx_addr.x_host), 376 sizeof(edst)); 377 /* If broadcasting on a simplex interface, loopback a copy */ 378 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 379 mcopy = m_copy(m, 0, (int)M_COPYALL); 380 break; 381 #endif 382 #ifdef ISO 383 case AF_ISO: { 384 int snpalen; 385 struct llc *l; 386 const struct sockaddr_dl *sdl; 387 388 if (rt && (sdl = satocsdl(rt->rt_gateway)) && 389 sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) { 390 memcpy(edst, CLLADDR(sdl), sizeof(edst)); 391 } else { 392 error = iso_snparesolve(ifp, 393 (const struct sockaddr_iso *)dst, 394 (char *)edst, &snpalen); 395 if (error) 396 goto bad; /* Not Resolved */ 397 } 398 /* If broadcasting on a simplex interface, loopback a copy */ 399 if (*edst & 1) 400 m->m_flags |= (M_BCAST|M_MCAST); 401 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) && 402 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 403 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 404 if (mcopy) { 405 eh = mtod(mcopy, struct ether_header *); 406 memcpy(eh->ether_dhost, edst, sizeof(edst)); 407 memcpy(eh->ether_shost, CLLADDR(ifp->if_sadl), 408 sizeof(edst)); 409 } 410 } 411 M_PREPEND(m, 3, M_DONTWAIT); 412 if (m == NULL) 413 return (0); 414 l = mtod(m, struct llc *); 415 l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP; 416 l->llc_control = LLC_UI; 417 #ifdef ARGO_DEBUG 418 if (argo_debug[D_ETHER]) { 419 int i; 420 printf("unoutput: sending pkt to: "); 421 for (i=0; i<6; i++) 422 printf("%x ", edst[i] & 0xff); 423 printf("\n"); 424 } 425 #endif 426 } break; 427 #endif /* ISO */ 428 429 case pseudo_AF_HDRCMPLT: 430 hdrcmplt = 1; 431 memcpy(esrc, 432 ((const struct ether_header *)dst->sa_data)->ether_shost, 433 sizeof(esrc)); 434 /* FALLTHROUGH */ 435 436 case AF_UNSPEC: 437 memcpy(edst, 438 ((const struct ether_header *)dst->sa_data)->ether_dhost, 439 sizeof(edst)); 440 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 441 etype = ((const struct ether_header *)dst->sa_data)->ether_type; 442 break; 443 444 default: 445 printf("%s: can't handle af%d\n", ifp->if_xname, 446 dst->sa_family); 447 senderr(EAFNOSUPPORT); 448 } 449 450 if (mcopy) 451 (void)looutput(ifp, mcopy, dst, rt); 452 453 /* If no ether type is set, this must be a 802.2 formatted packet. 454 */ 455 if (etype == 0) 456 etype = htons(m->m_pkthdr.len); 457 /* 458 * Add local net header. If no space in first mbuf, 459 * allocate another. 460 */ 461 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 462 if (m == 0) 463 senderr(ENOBUFS); 464 eh = mtod(m, struct ether_header *); 465 /* Note: etype is already in network byte order. */ 466 (void)memcpy(&eh->ether_type, &etype, sizeof(eh->ether_type)); 467 memcpy(eh->ether_dhost, edst, sizeof(edst)); 468 if (hdrcmplt) 469 memcpy(eh->ether_shost, esrc, sizeof(eh->ether_shost)); 470 else 471 memcpy(eh->ether_shost, CLLADDR(ifp->if_sadl), 472 sizeof(eh->ether_shost)); 473 474 #if NCARP > 0 475 if (ifp0 != ifp && ifp0->if_type == IFT_CARP) { 476 memcpy(eh->ether_shost, CLLADDR(ifp0->if_sadl), 477 sizeof(eh->ether_shost)); 478 } 479 #endif /* NCARP > 0 */ 480 481 #ifdef PFIL_HOOKS 482 if ((error = pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 483 return (error); 484 if (m == NULL) 485 return (0); 486 #endif 487 488 #if NBRIDGE > 0 489 /* 490 * Bridges require special output handling. 491 */ 492 if (ifp->if_bridge) 493 return (bridge_output(ifp, m, NULL, NULL)); 494 #endif 495 496 #if NCARP > 0 497 if (ifp != ifp0) 498 ifp0->if_obytes += m->m_pkthdr.len + ETHER_HDR_LEN; 499 #endif /* NCARP > 0 */ 500 501 #ifdef ALTQ 502 /* 503 * If ALTQ is enabled on the parent interface, do 504 * classification; the queueing discipline might not 505 * require classification, but might require the 506 * address family/header pointer in the pktattr. 507 */ 508 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 509 altq_etherclassify(&ifp->if_snd, m, &pktattr); 510 #endif 511 512 return ifq_enqueue(ifp, m ALTQ_COMMA ALTQ_DECL(&pktattr)); 513 514 bad: 515 if (m) 516 m_freem(m); 517 return (error); 518 } 519 520 #ifdef ALTQ 521 /* 522 * This routine is a slight hack to allow a packet to be classified 523 * if the Ethernet headers are present. It will go away when ALTQ's 524 * classification engine understands link headers. 525 */ 526 void 527 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m, 528 struct altq_pktattr *pktattr) 529 { 530 struct ether_header *eh; 531 uint16_t ether_type; 532 int hlen, af, hdrsize; 533 void *hdr; 534 535 hlen = ETHER_HDR_LEN; 536 eh = mtod(m, struct ether_header *); 537 538 ether_type = htons(eh->ether_type); 539 540 if (ether_type < ETHERMTU) { 541 /* LLC/SNAP */ 542 struct llc *llc = (struct llc *)(eh + 1); 543 hlen += 8; 544 545 if (m->m_len < hlen || 546 llc->llc_dsap != LLC_SNAP_LSAP || 547 llc->llc_ssap != LLC_SNAP_LSAP || 548 llc->llc_control != LLC_UI) { 549 /* Not SNAP. */ 550 goto bad; 551 } 552 553 ether_type = htons(llc->llc_un.type_snap.ether_type); 554 } 555 556 switch (ether_type) { 557 case ETHERTYPE_IP: 558 af = AF_INET; 559 hdrsize = 20; /* sizeof(struct ip) */ 560 break; 561 562 case ETHERTYPE_IPV6: 563 af = AF_INET6; 564 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 565 break; 566 567 default: 568 af = AF_UNSPEC; 569 hdrsize = 0; 570 break; 571 } 572 573 while (m->m_len <= hlen) { 574 hlen -= m->m_len; 575 m = m->m_next; 576 } 577 if (m->m_len < (hlen + hdrsize)) { 578 /* 579 * protocol header not in a single mbuf. 580 * We can't cope with this situation right 581 * now (but it shouldn't ever happen, really, anyhow). 582 */ 583 #ifdef DEBUG 584 printf("altq_etherclassify: headers span multiple mbufs: " 585 "%d < %d\n", m->m_len, (hlen + hdrsize)); 586 #endif 587 goto bad; 588 } 589 590 m->m_data += hlen; 591 m->m_len -= hlen; 592 593 hdr = mtod(m, void *); 594 595 if (ALTQ_NEEDS_CLASSIFY(ifq)) 596 pktattr->pattr_class = 597 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 598 pktattr->pattr_af = af; 599 pktattr->pattr_hdr = hdr; 600 601 m->m_data -= hlen; 602 m->m_len += hlen; 603 604 return; 605 606 bad: 607 pktattr->pattr_class = NULL; 608 pktattr->pattr_hdr = NULL; 609 pktattr->pattr_af = AF_UNSPEC; 610 } 611 #endif /* ALTQ */ 612 613 /* 614 * Process a received Ethernet packet; 615 * the packet is in the mbuf chain m with 616 * the ether header. 617 */ 618 void 619 ether_input(struct ifnet *ifp, struct mbuf *m) 620 { 621 struct ethercom *ec = (struct ethercom *) ifp; 622 struct ifqueue *inq; 623 uint16_t etype; 624 struct ether_header *eh; 625 #if defined (ISO) || defined (LLC) || defined(NETATALK) 626 struct llc *l; 627 #endif 628 629 if ((ifp->if_flags & IFF_UP) == 0) { 630 m_freem(m); 631 return; 632 } 633 634 #ifdef MBUFTRACE 635 m_claimm(m, &ec->ec_rx_mowner); 636 #endif 637 eh = mtod(m, struct ether_header *); 638 etype = ntohs(eh->ether_type); 639 640 /* 641 * Determine if the packet is within its size limits. 642 */ 643 if (m->m_pkthdr.len > 644 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 645 if (ppsratecheck(&bigpktppslim_last, &bigpktpps_count, 646 bigpktppslim)) { 647 printf("%s: discarding oversize frame (len=%d)\n", 648 ifp->if_xname, m->m_pkthdr.len); 649 } 650 m_freem(m); 651 return; 652 } 653 654 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 655 /* 656 * If this is not a simplex interface, drop the packet 657 * if it came from us. 658 */ 659 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 660 memcmp(CLLADDR(ifp->if_sadl), eh->ether_shost, 661 ETHER_ADDR_LEN) == 0) { 662 m_freem(m); 663 return; 664 } 665 666 if (memcmp(etherbroadcastaddr, 667 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 668 m->m_flags |= M_BCAST; 669 else 670 m->m_flags |= M_MCAST; 671 ifp->if_imcasts++; 672 } 673 674 /* If the CRC is still on the packet, trim it off. */ 675 if (m->m_flags & M_HASFCS) { 676 m_adj(m, -ETHER_CRC_LEN); 677 m->m_flags &= ~M_HASFCS; 678 } 679 680 ifp->if_ibytes += m->m_pkthdr.len; 681 682 #if NBRIDGE > 0 683 /* 684 * Tap the packet off here for a bridge. bridge_input() 685 * will return NULL if it has consumed the packet, otherwise 686 * it gets processed as normal. Note that bridge_input() 687 * will always return the original packet if we need to 688 * process it locally. 689 */ 690 if (ifp->if_bridge) { 691 /* clear M_PROMISC, in case the packets comes from a vlan */ 692 m->m_flags &= ~M_PROMISC; 693 m = bridge_input(ifp, m); 694 if (m == NULL) 695 return; 696 697 /* 698 * Bridge has determined that the packet is for us. 699 * Update our interface pointer -- we may have had 700 * to "bridge" the packet locally. 701 */ 702 ifp = m->m_pkthdr.rcvif; 703 } else 704 #endif /* NBRIDGE > 0 */ 705 { 706 707 #if NCARP > 0 708 if (__predict_false(ifp->if_carp && ifp->if_type != IFT_CARP)) { 709 /* 710 * clear M_PROMISC, in case the packets comes from a 711 * vlan 712 */ 713 m->m_flags &= ~M_PROMISC; 714 if (carp_input(m, (uint8_t *)&eh->ether_shost, 715 (uint8_t *)&eh->ether_dhost, eh->ether_type) == 0) 716 return; 717 } 718 #endif /* NCARP > 0 */ 719 if ((m->m_flags & (M_BCAST|M_MCAST|M_PROMISC)) == 0 && 720 (ifp->if_flags & IFF_PROMISC) != 0 && 721 memcmp(CLLADDR(ifp->if_sadl), eh->ether_dhost, 722 ETHER_ADDR_LEN) != 0) { 723 m->m_flags |= M_PROMISC; 724 } 725 } 726 727 #ifdef PFIL_HOOKS 728 if ((m->m_flags & M_PROMISC) == 0) { 729 if (pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 730 return; 731 if (m == NULL) 732 return; 733 734 eh = mtod(m, struct ether_header *); 735 etype = ntohs(eh->ether_type); 736 } 737 #endif 738 739 #if NAGR > 0 740 if (ifp->if_agrprivate && 741 __predict_true(etype != ETHERTYPE_SLOWPROTOCOLS)) { 742 m->m_flags &= ~M_PROMISC; 743 agr_input(ifp, m); 744 return; 745 } 746 #endif /* NAGR > 0 */ 747 748 /* 749 * If VLANs are configured on the interface, check to 750 * see if the device performed the decapsulation and 751 * provided us with the tag. 752 */ 753 if (ec->ec_nvlans && m_tag_find(m, PACKET_TAG_VLAN, NULL) != NULL) { 754 #if NVLAN > 0 755 /* 756 * vlan_input() will either recursively call ether_input() 757 * or drop the packet. 758 */ 759 vlan_input(ifp, m); 760 #else 761 m_freem(m); 762 #endif 763 return; 764 } 765 766 /* 767 * Handle protocols that expect to have the Ethernet header 768 * (and possibly FCS) intact. 769 */ 770 switch (etype) { 771 #if NVLAN > 0 772 case ETHERTYPE_VLAN: 773 /* 774 * vlan_input() will either recursively call ether_input() 775 * or drop the packet. 776 */ 777 if (((struct ethercom *)ifp)->ec_nvlans != 0) 778 vlan_input(ifp, m); 779 else 780 m_freem(m); 781 return; 782 #endif /* NVLAN > 0 */ 783 #if NPPPOE > 0 784 case ETHERTYPE_PPPOEDISC: 785 case ETHERTYPE_PPPOE: 786 if (m->m_flags & M_PROMISC) { 787 m_freem(m); 788 return; 789 } 790 #ifndef PPPOE_SERVER 791 if (m->m_flags & (M_MCAST | M_BCAST)) { 792 m_freem(m); 793 return; 794 } 795 #endif 796 797 if (etype == ETHERTYPE_PPPOEDISC) 798 inq = &ppoediscinq; 799 else 800 inq = &ppoeinq; 801 if (IF_QFULL(inq)) { 802 IF_DROP(inq); 803 m_freem(m); 804 } else 805 IF_ENQUEUE(inq, m); 806 softint_schedule(pppoe_softintr); 807 return; 808 #endif /* NPPPOE > 0 */ 809 case ETHERTYPE_SLOWPROTOCOLS: { 810 uint8_t subtype; 811 812 #if defined(DIAGNOSTIC) 813 if (m->m_pkthdr.len < sizeof(*eh) + sizeof(subtype)) { 814 panic("ether_input: too short slow protocol packet"); 815 } 816 #endif 817 m_copydata(m, sizeof(*eh), sizeof(subtype), &subtype); 818 switch (subtype) { 819 #if NAGR > 0 820 case SLOWPROTOCOLS_SUBTYPE_LACP: 821 if (ifp->if_agrprivate) { 822 ieee8023ad_lacp_input(ifp, m); 823 return; 824 } 825 break; 826 827 case SLOWPROTOCOLS_SUBTYPE_MARKER: 828 if (ifp->if_agrprivate) { 829 ieee8023ad_marker_input(ifp, m); 830 return; 831 } 832 break; 833 #endif /* NAGR > 0 */ 834 default: 835 if (subtype == 0 || subtype > 10) { 836 /* illegal value */ 837 m_freem(m); 838 return; 839 } 840 /* unknown subtype */ 841 break; 842 } 843 /* FALLTHROUGH */ 844 } 845 default: 846 if (m->m_flags & M_PROMISC) { 847 m_freem(m); 848 return; 849 } 850 } 851 852 /* If the CRC is still on the packet, trim it off. */ 853 if (m->m_flags & M_HASFCS) { 854 m_adj(m, -ETHER_CRC_LEN); 855 m->m_flags &= ~M_HASFCS; 856 } 857 858 if (etype > ETHERMTU + sizeof (struct ether_header)) { 859 /* Strip off the Ethernet header. */ 860 m_adj(m, sizeof(struct ether_header)); 861 862 switch (etype) { 863 #ifdef INET 864 case ETHERTYPE_IP: 865 #ifdef GATEWAY 866 if (ipflow_fastforward(m)) 867 return; 868 #endif 869 schednetisr(NETISR_IP); 870 inq = &ipintrq; 871 break; 872 873 case ETHERTYPE_ARP: 874 schednetisr(NETISR_ARP); 875 inq = &arpintrq; 876 break; 877 878 case ETHERTYPE_REVARP: 879 revarpinput(m); /* XXX queue? */ 880 return; 881 #endif 882 #ifdef INET6 883 case ETHERTYPE_IPV6: 884 #ifdef GATEWAY 885 if (ip6flow_fastforward(m)) 886 return; 887 #endif 888 schednetisr(NETISR_IPV6); 889 inq = &ip6intrq; 890 break; 891 #endif 892 #ifdef IPX 893 case ETHERTYPE_IPX: 894 schednetisr(NETISR_IPX); 895 inq = &ipxintrq; 896 break; 897 #endif 898 #ifdef NETATALK 899 case ETHERTYPE_ATALK: 900 schednetisr(NETISR_ATALK); 901 inq = &atintrq1; 902 break; 903 case ETHERTYPE_AARP: 904 /* probably this should be done with a NETISR as well */ 905 aarpinput(ifp, m); /* XXX */ 906 return; 907 #endif /* NETATALK */ 908 default: 909 m_freem(m); 910 return; 911 } 912 } else { 913 #if defined (ISO) || defined (LLC) || defined (NETATALK) 914 l = (struct llc *)(eh+1); 915 switch (l->llc_dsap) { 916 #ifdef NETATALK 917 case LLC_SNAP_LSAP: 918 switch (l->llc_control) { 919 case LLC_UI: 920 if (l->llc_ssap != LLC_SNAP_LSAP) { 921 goto dropanyway; 922 } 923 924 if (memcmp(&(l->llc_snap_org_code)[0], 925 at_org_code, sizeof(at_org_code)) == 0 && 926 ntohs(l->llc_snap_ether_type) == 927 ETHERTYPE_ATALK) { 928 inq = &atintrq2; 929 m_adj(m, sizeof(struct ether_header) 930 + sizeof(struct llc)); 931 schednetisr(NETISR_ATALK); 932 break; 933 } 934 935 if (memcmp(&(l->llc_snap_org_code)[0], 936 aarp_org_code, 937 sizeof(aarp_org_code)) == 0 && 938 ntohs(l->llc_snap_ether_type) == 939 ETHERTYPE_AARP) { 940 m_adj( m, sizeof(struct ether_header) 941 + sizeof(struct llc)); 942 aarpinput(ifp, m); /* XXX */ 943 return; 944 } 945 946 default: 947 goto dropanyway; 948 } 949 break; 950 #endif /* NETATALK */ 951 #ifdef ISO 952 case LLC_ISO_LSAP: 953 switch (l->llc_control) { 954 case LLC_UI: 955 /* LLC_UI_P forbidden in class 1 service */ 956 if ((l->llc_dsap == LLC_ISO_LSAP) && /* XXX? case tested */ 957 (l->llc_ssap == LLC_ISO_LSAP)) { 958 /* LSAP for ISO */ 959 /* XXX length computation?? */ 960 if (m->m_pkthdr.len > etype + sizeof(struct ether_header)) 961 m_adj(m, etype - m->m_pkthdr.len); 962 963 #ifdef ARGO_DEBUG 964 if (argo_debug[D_ETHER]) 965 printf("clnp packet"); 966 #endif 967 schednetisr(NETISR_ISO); 968 inq = &clnlintrq; 969 break; 970 } 971 goto dropanyway; 972 973 case LLC_XID: 974 case LLC_XID_P: 975 if(m->m_len < LLC_XID_BASIC_MINLEN + sizeof(struct ether_header)) 976 /* XXX m_pullup? */ 977 goto dropanyway; 978 l->llc_window = 0; 979 l->llc_fid = LLC_XID_FORMAT_BASIC; 980 l->llc_class = LLC_XID_CLASS_I; 981 l->llc_dsap = l->llc_ssap = 0; 982 /* Fall through to */ 983 case LLC_TEST: 984 case LLC_TEST_P: 985 { 986 struct sockaddr sa; 987 struct ether_header *eh2; 988 int i; 989 u_char c = l->llc_dsap; 990 991 l->llc_dsap = l->llc_ssap; 992 l->llc_ssap = c; 993 m_adj(m, sizeof(struct ether_header)); 994 /* XXX we can optimize here? */ 995 if (m->m_flags & (M_BCAST | M_MCAST)) 996 memcpy(eh->ether_dhost, 997 CLLADDR(ifp->if_sadl), 998 ETHER_ADDR_LEN); 999 sa.sa_family = AF_UNSPEC; 1000 sa.sa_len = sizeof(sa); 1001 eh2 = (struct ether_header *)sa.sa_data; 1002 for (i = 0; i < 6; i++) { 1003 eh2->ether_shost[i] = c = 1004 eh->ether_dhost[i]; 1005 eh2->ether_dhost[i] = 1006 eh->ether_dhost[i] = 1007 eh->ether_shost[i]; 1008 eh->ether_shost[i] = c; 1009 } 1010 ifp->if_output(ifp, m, &sa, NULL); 1011 return; 1012 } 1013 default: 1014 m_freem(m); 1015 return; 1016 } 1017 break; 1018 #endif /* ISO */ 1019 #if defined (ISO) || defined (NETATALK) 1020 dropanyway: 1021 #endif 1022 default: 1023 m_freem(m); 1024 return; 1025 } 1026 #else /* ISO || LLC || NETATALK*/ 1027 m_freem(m); 1028 return; 1029 #endif /* ISO || LLC || NETATALK*/ 1030 } 1031 1032 if (IF_QFULL(inq)) { 1033 IF_DROP(inq); 1034 m_freem(m); 1035 } else 1036 IF_ENQUEUE(inq, m); 1037 } 1038 1039 /* 1040 * Convert Ethernet address to printable (loggable) representation. 1041 */ 1042 char * 1043 ether_sprintf(const u_char *ap) 1044 { 1045 static char etherbuf[3 * ETHER_ADDR_LEN]; 1046 return ether_snprintf(etherbuf, sizeof(etherbuf), ap); 1047 } 1048 1049 char * 1050 ether_snprintf(char *buf, size_t len, const u_char *ap) 1051 { 1052 char *cp = buf; 1053 size_t i; 1054 1055 for (i = 0; i < len / 3; i++) { 1056 *cp++ = hexdigits[*ap >> 4]; 1057 *cp++ = hexdigits[*ap++ & 0xf]; 1058 *cp++ = ':'; 1059 } 1060 *--cp = '\0'; 1061 return buf; 1062 } 1063 1064 /* 1065 * Perform common duties while attaching to interface list 1066 */ 1067 void 1068 ether_ifattach(struct ifnet *ifp, const uint8_t *lla) 1069 { 1070 struct ethercom *ec = (struct ethercom *)ifp; 1071 1072 ifp->if_type = IFT_ETHER; 1073 ifp->if_hdrlen = ETHER_HDR_LEN; 1074 ifp->if_dlt = DLT_EN10MB; 1075 ifp->if_mtu = ETHERMTU; 1076 ifp->if_output = ether_output; 1077 ifp->if_input = ether_input; 1078 if (ifp->if_baudrate == 0) 1079 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 1080 1081 if_set_sadl(ifp, lla, ETHER_ADDR_LEN, !ETHER_IS_LOCAL(lla)); 1082 1083 LIST_INIT(&ec->ec_multiaddrs); 1084 ifp->if_broadcastaddr = etherbroadcastaddr; 1085 bpf_attach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 1086 #ifdef MBUFTRACE 1087 strlcpy(ec->ec_tx_mowner.mo_name, ifp->if_xname, 1088 sizeof(ec->ec_tx_mowner.mo_name)); 1089 strlcpy(ec->ec_tx_mowner.mo_descr, "tx", 1090 sizeof(ec->ec_tx_mowner.mo_descr)); 1091 strlcpy(ec->ec_rx_mowner.mo_name, ifp->if_xname, 1092 sizeof(ec->ec_rx_mowner.mo_name)); 1093 strlcpy(ec->ec_rx_mowner.mo_descr, "rx", 1094 sizeof(ec->ec_rx_mowner.mo_descr)); 1095 MOWNER_ATTACH(&ec->ec_tx_mowner); 1096 MOWNER_ATTACH(&ec->ec_rx_mowner); 1097 ifp->if_mowner = &ec->ec_tx_mowner; 1098 #endif 1099 } 1100 1101 void 1102 ether_ifdetach(struct ifnet *ifp) 1103 { 1104 struct ethercom *ec = (void *) ifp; 1105 struct ether_multi *enm; 1106 int s; 1107 1108 #if NBRIDGE > 0 1109 if (ifp->if_bridge) 1110 bridge_ifdetach(ifp); 1111 #endif 1112 1113 bpf_detach(ifp); 1114 1115 #if NVLAN > 0 1116 if (ec->ec_nvlans) 1117 vlan_ifdetach(ifp); 1118 #endif 1119 1120 s = splnet(); 1121 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1122 LIST_REMOVE(enm, enm_list); 1123 free(enm, M_IFMADDR); 1124 ec->ec_multicnt--; 1125 } 1126 splx(s); 1127 1128 #if 0 /* done in if_detach() */ 1129 if_free_sadl(ifp); 1130 #endif 1131 1132 MOWNER_DETACH(&ec->ec_rx_mowner); 1133 MOWNER_DETACH(&ec->ec_tx_mowner); 1134 } 1135 1136 #if 0 1137 /* 1138 * This is for reference. We have a table-driven version 1139 * of the little-endian crc32 generator, which is faster 1140 * than the double-loop. 1141 */ 1142 uint32_t 1143 ether_crc32_le(const uint8_t *buf, size_t len) 1144 { 1145 uint32_t c, crc, carry; 1146 size_t i, j; 1147 1148 crc = 0xffffffffU; /* initial value */ 1149 1150 for (i = 0; i < len; i++) { 1151 c = buf[i]; 1152 for (j = 0; j < 8; j++) { 1153 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1154 crc >>= 1; 1155 c >>= 1; 1156 if (carry) 1157 crc = (crc ^ ETHER_CRC_POLY_LE); 1158 } 1159 } 1160 1161 return (crc); 1162 } 1163 #else 1164 uint32_t 1165 ether_crc32_le(const uint8_t *buf, size_t len) 1166 { 1167 static const uint32_t crctab[] = { 1168 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1169 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1170 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1171 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1172 }; 1173 uint32_t crc; 1174 size_t i; 1175 1176 crc = 0xffffffffU; /* initial value */ 1177 1178 for (i = 0; i < len; i++) { 1179 crc ^= buf[i]; 1180 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1181 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1182 } 1183 1184 return (crc); 1185 } 1186 #endif 1187 1188 uint32_t 1189 ether_crc32_be(const uint8_t *buf, size_t len) 1190 { 1191 uint32_t c, crc, carry; 1192 size_t i, j; 1193 1194 crc = 0xffffffffU; /* initial value */ 1195 1196 for (i = 0; i < len; i++) { 1197 c = buf[i]; 1198 for (j = 0; j < 8; j++) { 1199 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1200 crc <<= 1; 1201 c >>= 1; 1202 if (carry) 1203 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1204 } 1205 } 1206 1207 return (crc); 1208 } 1209 1210 #ifdef INET 1211 const uint8_t ether_ipmulticast_min[ETHER_ADDR_LEN] = 1212 { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1213 const uint8_t ether_ipmulticast_max[ETHER_ADDR_LEN] = 1214 { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1215 #endif 1216 #ifdef INET6 1217 const uint8_t ether_ip6multicast_min[ETHER_ADDR_LEN] = 1218 { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1219 const uint8_t ether_ip6multicast_max[ETHER_ADDR_LEN] = 1220 { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1221 #endif 1222 1223 /* 1224 * ether_aton implementation, not using a static buffer. 1225 */ 1226 int 1227 ether_nonstatic_aton(u_char *dest, const char *src) 1228 { 1229 int i; 1230 char str[3 * ETHER_ADDR_LEN + 2]; 1231 u_char val[ETHER_ADDR_LEN]; 1232 char *cp; 1233 1234 #define set_value \ 1235 if (*cp > '9' && *cp < 'a') \ 1236 *cp -= 'A' - 10; \ 1237 else if (*cp > '9') \ 1238 *cp -= 'a' - 10; \ 1239 else \ 1240 *cp -= '0' 1241 1242 strlcpy(str, src, sizeof(str)); 1243 1244 cp = str; 1245 1246 for (i = 0; i < ETHER_ADDR_LEN; i++) { 1247 if (!isxdigit(*cp)) 1248 return 1; 1249 set_value; 1250 val[i] = *cp++; 1251 if (isxdigit(*cp)) { 1252 set_value; 1253 val[i] <<= 4; 1254 val[i] += *cp++; 1255 } 1256 if (*cp == ':' || *cp == '-' || *cp == '.' || *cp == ' ') { 1257 cp++; 1258 continue; 1259 } 1260 if (isxdigit(*cp) || i == (ETHER_ADDR_LEN - 1)) 1261 continue; 1262 return 1; 1263 } 1264 memcpy(dest, val, ETHER_ADDR_LEN); 1265 1266 return 0; 1267 #undef set_value 1268 } 1269 1270 1271 /* 1272 * Convert a sockaddr into an Ethernet address or range of Ethernet 1273 * addresses. 1274 */ 1275 int 1276 ether_multiaddr(const struct sockaddr *sa, uint8_t addrlo[ETHER_ADDR_LEN], 1277 uint8_t addrhi[ETHER_ADDR_LEN]) 1278 { 1279 #ifdef INET 1280 const struct sockaddr_in *sin; 1281 #endif /* INET */ 1282 #ifdef INET6 1283 const struct sockaddr_in6 *sin6; 1284 #endif /* INET6 */ 1285 1286 switch (sa->sa_family) { 1287 1288 case AF_UNSPEC: 1289 memcpy(addrlo, sa->sa_data, ETHER_ADDR_LEN); 1290 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1291 break; 1292 1293 #ifdef INET 1294 case AF_INET: 1295 sin = satocsin(sa); 1296 if (sin->sin_addr.s_addr == INADDR_ANY) { 1297 /* 1298 * An IP address of INADDR_ANY means listen to 1299 * or stop listening to all of the Ethernet 1300 * multicast addresses used for IP. 1301 * (This is for the sake of IP multicast routers.) 1302 */ 1303 memcpy(addrlo, ether_ipmulticast_min, ETHER_ADDR_LEN); 1304 memcpy(addrhi, ether_ipmulticast_max, ETHER_ADDR_LEN); 1305 } 1306 else { 1307 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1308 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1309 } 1310 break; 1311 #endif 1312 #ifdef INET6 1313 case AF_INET6: 1314 sin6 = satocsin6(sa); 1315 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1316 /* 1317 * An IP6 address of 0 means listen to or stop 1318 * listening to all of the Ethernet multicast 1319 * address used for IP6. 1320 * (This is used for multicast routers.) 1321 */ 1322 memcpy(addrlo, ether_ip6multicast_min, ETHER_ADDR_LEN); 1323 memcpy(addrhi, ether_ip6multicast_max, ETHER_ADDR_LEN); 1324 } else { 1325 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1326 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1327 } 1328 break; 1329 #endif 1330 1331 default: 1332 return EAFNOSUPPORT; 1333 } 1334 return 0; 1335 } 1336 1337 /* 1338 * Add an Ethernet multicast address or range of addresses to the list for a 1339 * given interface. 1340 */ 1341 int 1342 ether_addmulti(const struct sockaddr *sa, struct ethercom *ec) 1343 { 1344 struct ether_multi *enm; 1345 u_char addrlo[ETHER_ADDR_LEN]; 1346 u_char addrhi[ETHER_ADDR_LEN]; 1347 int s = splnet(), error; 1348 1349 error = ether_multiaddr(sa, addrlo, addrhi); 1350 if (error != 0) { 1351 splx(s); 1352 return error; 1353 } 1354 1355 /* 1356 * Verify that we have valid Ethernet multicast addresses. 1357 */ 1358 if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) { 1359 splx(s); 1360 return EINVAL; 1361 } 1362 /* 1363 * See if the address range is already in the list. 1364 */ 1365 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1366 if (enm != NULL) { 1367 /* 1368 * Found it; just increment the reference count. 1369 */ 1370 ++enm->enm_refcount; 1371 splx(s); 1372 return 0; 1373 } 1374 /* 1375 * New address or range; malloc a new multicast record 1376 * and link it into the interface's multicast list. 1377 */ 1378 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1379 if (enm == NULL) { 1380 splx(s); 1381 return ENOBUFS; 1382 } 1383 memcpy(enm->enm_addrlo, addrlo, 6); 1384 memcpy(enm->enm_addrhi, addrhi, 6); 1385 enm->enm_refcount = 1; 1386 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1387 ec->ec_multicnt++; 1388 splx(s); 1389 /* 1390 * Return ENETRESET to inform the driver that the list has changed 1391 * and its reception filter should be adjusted accordingly. 1392 */ 1393 return ENETRESET; 1394 } 1395 1396 /* 1397 * Delete a multicast address record. 1398 */ 1399 int 1400 ether_delmulti(const struct sockaddr *sa, struct ethercom *ec) 1401 { 1402 struct ether_multi *enm; 1403 u_char addrlo[ETHER_ADDR_LEN]; 1404 u_char addrhi[ETHER_ADDR_LEN]; 1405 int s = splnet(), error; 1406 1407 error = ether_multiaddr(sa, addrlo, addrhi); 1408 if (error != 0) { 1409 splx(s); 1410 return (error); 1411 } 1412 1413 /* 1414 * Look ur the address in our list. 1415 */ 1416 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1417 if (enm == NULL) { 1418 splx(s); 1419 return (ENXIO); 1420 } 1421 if (--enm->enm_refcount != 0) { 1422 /* 1423 * Still some claims to this record. 1424 */ 1425 splx(s); 1426 return (0); 1427 } 1428 /* 1429 * No remaining claims to this record; unlink and free it. 1430 */ 1431 LIST_REMOVE(enm, enm_list); 1432 free(enm, M_IFMADDR); 1433 ec->ec_multicnt--; 1434 splx(s); 1435 /* 1436 * Return ENETRESET to inform the driver that the list has changed 1437 * and its reception filter should be adjusted accordingly. 1438 */ 1439 return (ENETRESET); 1440 } 1441 1442 void 1443 ether_set_ifflags_cb(struct ethercom *ec, ether_cb_t cb) 1444 { 1445 ec->ec_ifflags_cb = cb; 1446 } 1447 1448 /* 1449 * Common ioctls for Ethernet interfaces. Note, we must be 1450 * called at splnet(). 1451 */ 1452 int 1453 ether_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1454 { 1455 struct ethercom *ec = (void *) ifp; 1456 struct ifreq *ifr = (struct ifreq *)data; 1457 struct if_laddrreq *iflr = data; 1458 const struct sockaddr_dl *sdl; 1459 static const uint8_t zero[ETHER_ADDR_LEN]; 1460 int error; 1461 1462 switch (cmd) { 1463 case SIOCINITIFADDR: 1464 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != 1465 (IFF_UP|IFF_RUNNING)) { 1466 ifp->if_flags |= IFF_UP; 1467 if ((error = (*ifp->if_init)(ifp)) != 0) 1468 return error; 1469 } 1470 #ifdef INET 1471 { 1472 struct ifaddr *ifa = (struct ifaddr *)data; 1473 1474 if (ifa->ifa_addr->sa_family == AF_INET) 1475 arp_ifinit(ifp, ifa); 1476 } 1477 #endif /* INET */ 1478 return 0; 1479 1480 case SIOCSIFMTU: 1481 { 1482 int maxmtu; 1483 1484 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1485 maxmtu = ETHERMTU_JUMBO; 1486 else 1487 maxmtu = ETHERMTU; 1488 1489 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1490 return EINVAL; 1491 else if ((error = ifioctl_common(ifp, cmd, data)) != ENETRESET) 1492 return error; 1493 else if (ifp->if_flags & IFF_UP) { 1494 /* Make sure the device notices the MTU change. */ 1495 return (*ifp->if_init)(ifp); 1496 } else 1497 return 0; 1498 } 1499 1500 case SIOCSIFFLAGS: 1501 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1502 return error; 1503 switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) { 1504 case IFF_RUNNING: 1505 /* 1506 * If interface is marked down and it is running, 1507 * then stop and disable it. 1508 */ 1509 (*ifp->if_stop)(ifp, 1); 1510 break; 1511 case IFF_UP: 1512 /* 1513 * If interface is marked up and it is stopped, then 1514 * start it. 1515 */ 1516 return (*ifp->if_init)(ifp); 1517 case IFF_UP|IFF_RUNNING: 1518 error = 0; 1519 if (ec->ec_ifflags_cb == NULL || 1520 (error = (*ec->ec_ifflags_cb)(ec)) == ENETRESET) { 1521 /* 1522 * Reset the interface to pick up 1523 * changes in any other flags that 1524 * affect the hardware state. 1525 */ 1526 return (*ifp->if_init)(ifp); 1527 } else 1528 return error; 1529 case 0: 1530 break; 1531 } 1532 return 0; 1533 case SIOCADDMULTI: 1534 return ether_addmulti(ifreq_getaddr(cmd, ifr), ec); 1535 case SIOCDELMULTI: 1536 return ether_delmulti(ifreq_getaddr(cmd, ifr), ec); 1537 case SIOCSIFMEDIA: 1538 case SIOCGIFMEDIA: 1539 if (ec->ec_mii == NULL) 1540 return ENOTTY; 1541 return ifmedia_ioctl(ifp, ifr, &ec->ec_mii->mii_media, cmd); 1542 case SIOCALIFADDR: 1543 sdl = satocsdl(sstocsa(&iflr->addr)); 1544 if (sdl->sdl_family != AF_LINK) 1545 ; 1546 else if (ETHER_IS_MULTICAST(CLLADDR(sdl))) 1547 return EINVAL; 1548 else if (memcmp(zero, CLLADDR(sdl), sizeof(zero)) == 0) 1549 return EINVAL; 1550 /*FALLTHROUGH*/ 1551 default: 1552 return ifioctl_common(ifp, cmd, data); 1553 } 1554 return 0; 1555 } 1556
Indexes created Sun Sep 21 20:09:37 GMT 2025