if_ethersubr.c revision 1.173
1 /* $NetBSD: if_ethersubr.c,v 1.173 2009/11/20 02:14:56 christos 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 1.173 2009/11/20 02:14:56 christos 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 "bpfilter.h" 78 #include "arp.h" 79 #include "agr.h" 80 81 #include <sys/param.h> 82 #include <sys/systm.h> 83 #include <sys/kernel.h> 84 #include <sys/callout.h> 85 #include <sys/malloc.h> 86 #include <sys/mbuf.h> 87 #include <sys/protosw.h> 88 #include <sys/socket.h> 89 #include <sys/ioctl.h> 90 #include <sys/errno.h> 91 #include <sys/syslog.h> 92 #include <sys/kauth.h> 93 #include <sys/cpu.h> 94 #include <sys/intr.h> 95 #include <sys/device.h> 96 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 #if NBPFILTER > 0 116 #include <net/bpf.h> 117 #endif 118 119 #include <net/if_ether.h> 120 #if NVLAN > 0 121 #include <net/if_vlanvar.h> 122 #endif 123 124 #if NPPPOE > 0 125 #include <net/if_pppoe.h> 126 #endif 127 128 #if NAGR > 0 129 #include <net/agr/ieee8023_slowprotocols.h> /* XXX */ 130 #include <net/agr/ieee8023ad.h> 131 #include <net/agr/if_agrvar.h> 132 #endif 133 134 #if NBRIDGE > 0 135 #include <net/if_bridgevar.h> 136 #endif 137 138 #include <netinet/in.h> 139 #ifdef INET 140 #include <netinet/in_var.h> 141 #endif 142 #include <netinet/if_inarp.h> 143 144 #ifdef INET6 145 #ifndef INET 146 #include <netinet/in.h> 147 #endif 148 #include <netinet6/in6_var.h> 149 #include <netinet6/nd6.h> 150 #endif 151 152 153 #include "carp.h" 154 #if NCARP > 0 155 #include <netinet/ip_carp.h> 156 #endif 157 158 #ifdef IPX 159 #include <netipx/ipx.h> 160 #include <netipx/ipx_if.h> 161 #endif 162 163 #ifdef ISO 164 #include <netiso/argo_debug.h> 165 #include <netiso/iso.h> 166 #include <netiso/iso_var.h> 167 #include <netiso/iso_snpac.h> 168 #endif 169 170 171 172 #ifdef NETATALK 173 #include <netatalk/at.h> 174 #include <netatalk/at_var.h> 175 #include <netatalk/at_extern.h> 176 177 #define llc_snap_org_code llc_un.type_snap.org_code 178 #define llc_snap_ether_type llc_un.type_snap.ether_type 179 180 extern u_char at_org_code[3]; 181 extern u_char aarp_org_code[3]; 182 #endif /* NETATALK */ 183 184 static struct timeval bigpktppslim_last; 185 static int bigpktppslim = 2; /* XXX */ 186 static int bigpktpps_count; 187 188 189 const uint8_t etherbroadcastaddr[ETHER_ADDR_LEN] = 190 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 191 const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] = 192 { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 }; 193 #define senderr(e) { error = (e); goto bad;} 194 195 static int ether_output(struct ifnet *, struct mbuf *, 196 const struct sockaddr *, struct rtentry *); 197 198 /* 199 * Ethernet output routine. 200 * Encapsulate a packet of type family for the local net. 201 * Assumes that ifp is actually pointer to ethercom structure. 202 */ 203 static int 204 ether_output(struct ifnet *ifp0, struct mbuf *m0, const struct sockaddr *dst, 205 struct rtentry *rt0) 206 { 207 uint16_t etype = 0; 208 int error = 0, hdrcmplt = 0; 209 uint8_t esrc[6], edst[6]; 210 struct mbuf *m = m0; 211 struct rtentry *rt; 212 struct mbuf *mcopy = NULL; 213 struct ether_header *eh; 214 struct ifnet *ifp = ifp0; 215 ALTQ_DECL(struct altq_pktattr pktattr;) 216 #ifdef INET 217 struct arphdr *ah; 218 #endif /* INET */ 219 #ifdef NETATALK 220 struct at_ifaddr *aa; 221 #endif /* NETATALK */ 222 223 #ifdef MBUFTRACE 224 m_claimm(m, ifp->if_mowner); 225 #endif 226 227 #if NCARP > 0 228 if (ifp->if_type == IFT_CARP) { 229 struct ifaddr *ifa; 230 231 /* loop back if this is going to the carp interface */ 232 if (dst != NULL && ifp0->if_link_state == LINK_STATE_UP && 233 (ifa = ifa_ifwithaddr(dst)) != NULL && 234 ifa->ifa_ifp == ifp0) 235 return looutput(ifp0, m, dst, rt0); 236 237 ifp = ifp->if_carpdev; 238 /* ac = (struct arpcom *)ifp; */ 239 240 if ((ifp0->if_flags & (IFF_UP|IFF_RUNNING)) != 241 (IFF_UP|IFF_RUNNING)) 242 senderr(ENETDOWN); 243 } 244 #endif /* NCARP > 0 */ 245 246 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 247 senderr(ENETDOWN); 248 if ((rt = rt0) != NULL) { 249 if ((rt->rt_flags & RTF_UP) == 0) { 250 if ((rt0 = rt = rtalloc1(dst, 1)) != NULL) { 251 rt->rt_refcnt--; 252 if (rt->rt_ifp != ifp) 253 return (*rt->rt_ifp->if_output) 254 (ifp, m0, dst, rt); 255 } else 256 senderr(EHOSTUNREACH); 257 } 258 if ((rt->rt_flags & RTF_GATEWAY) && dst->sa_family != AF_NS) { 259 if (rt->rt_gwroute == NULL) 260 goto lookup; 261 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 262 rtfree(rt); rt = rt0; 263 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1); 264 if ((rt = rt->rt_gwroute) == NULL) 265 senderr(EHOSTUNREACH); 266 /* the "G" test below also prevents rt == rt0 */ 267 if ((rt->rt_flags & RTF_GATEWAY) || 268 (rt->rt_ifp != ifp)) { 269 rt->rt_refcnt--; 270 rt0->rt_gwroute = NULL; 271 senderr(EHOSTUNREACH); 272 } 273 } 274 } 275 if (rt->rt_flags & RTF_REJECT) 276 if (rt->rt_rmx.rmx_expire == 0 || 277 (u_long) time_second < rt->rt_rmx.rmx_expire) 278 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 279 } 280 281 switch (dst->sa_family) { 282 283 #ifdef INET 284 case AF_INET: 285 if (m->m_flags & M_BCAST) 286 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 287 else if (m->m_flags & M_MCAST) 288 ETHER_MAP_IP_MULTICAST(&satocsin(dst)->sin_addr, edst); 289 else if (!arpresolve(ifp, rt, m, dst, edst)) 290 return (0); /* if not yet resolved */ 291 /* If broadcasting on a simplex interface, loopback a copy */ 292 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 293 mcopy = m_copy(m, 0, (int)M_COPYALL); 294 etype = htons(ETHERTYPE_IP); 295 break; 296 297 case AF_ARP: 298 ah = mtod(m, struct arphdr *); 299 if (m->m_flags & M_BCAST) 300 (void)memcpy(edst, etherbroadcastaddr, sizeof(edst)); 301 else { 302 void *tha = ar_tha(ah); 303 304 if (tha == NULL) { 305 /* fake with ARPHDR_IEEE1394 */ 306 return 0; 307 } 308 memcpy(edst, tha, sizeof(edst)); 309 } 310 311 ah->ar_hrd = htons(ARPHRD_ETHER); 312 313 switch (ntohs(ah->ar_op)) { 314 case ARPOP_REVREQUEST: 315 case ARPOP_REVREPLY: 316 etype = htons(ETHERTYPE_REVARP); 317 break; 318 319 case ARPOP_REQUEST: 320 case ARPOP_REPLY: 321 default: 322 etype = htons(ETHERTYPE_ARP); 323 } 324 325 break; 326 #endif 327 #ifdef INET6 328 case AF_INET6: 329 if (!nd6_storelladdr(ifp, rt, m, dst, edst, sizeof(edst))){ 330 /* something bad happened */ 331 return (0); 332 } 333 etype = htons(ETHERTYPE_IPV6); 334 break; 335 #endif 336 #ifdef NETATALK 337 case AF_APPLETALK: 338 if (!aarpresolve(ifp, m, (const struct sockaddr_at *)dst, edst)) { 339 #ifdef NETATALKDEBUG 340 printf("aarpresolv failed\n"); 341 #endif /* NETATALKDEBUG */ 342 return (0); 343 } 344 /* 345 * ifaddr is the first thing in at_ifaddr 346 */ 347 aa = (struct at_ifaddr *) at_ifawithnet( 348 (const struct sockaddr_at *)dst, ifp); 349 if (aa == NULL) 350 goto bad; 351 352 /* 353 * In the phase 2 case, we need to prepend an mbuf for the 354 * llc header. Since we must preserve the value of m, 355 * which is passed to us by value, we m_copy() the first 356 * mbuf, and use it for our llc header. 357 */ 358 if (aa->aa_flags & AFA_PHASE2) { 359 struct llc llc; 360 361 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT); 362 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 363 llc.llc_control = LLC_UI; 364 memcpy(llc.llc_snap_org_code, at_org_code, 365 sizeof(llc.llc_snap_org_code)); 366 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK); 367 memcpy(mtod(m, void *), &llc, sizeof(struct llc)); 368 } else { 369 etype = htons(ETHERTYPE_ATALK); 370 } 371 break; 372 #endif /* NETATALK */ 373 #ifdef IPX 374 case AF_IPX: 375 etype = htons(ETHERTYPE_IPX); 376 memcpy(edst, 377 &(((const struct sockaddr_ipx *)dst)->sipx_addr.x_host), 378 sizeof(edst)); 379 /* If broadcasting on a simplex interface, loopback a copy */ 380 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) 381 mcopy = m_copy(m, 0, (int)M_COPYALL); 382 break; 383 #endif 384 #ifdef ISO 385 case AF_ISO: { 386 int snpalen; 387 struct llc *l; 388 const struct sockaddr_dl *sdl; 389 390 if (rt && (sdl = satocsdl(rt->rt_gateway)) && 391 sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) { 392 memcpy(edst, CLLADDR(sdl), sizeof(edst)); 393 } else { 394 error = iso_snparesolve(ifp, 395 (const struct sockaddr_iso *)dst, 396 (char *)edst, &snpalen); 397 if (error) 398 goto bad; /* Not Resolved */ 399 } 400 /* If broadcasting on a simplex interface, loopback a copy */ 401 if (*edst & 1) 402 m->m_flags |= (M_BCAST|M_MCAST); 403 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) && 404 (mcopy = m_copy(m, 0, (int)M_COPYALL))) { 405 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT); 406 if (mcopy) { 407 eh = mtod(mcopy, struct ether_header *); 408 memcpy(eh->ether_dhost, edst, sizeof(edst)); 409 memcpy(eh->ether_shost, CLLADDR(ifp->if_sadl), 410 sizeof(edst)); 411 } 412 } 413 M_PREPEND(m, 3, M_DONTWAIT); 414 if (m == NULL) 415 return (0); 416 l = mtod(m, struct llc *); 417 l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP; 418 l->llc_control = LLC_UI; 419 #ifdef ARGO_DEBUG 420 if (argo_debug[D_ETHER]) { 421 int i; 422 printf("unoutput: sending pkt to: "); 423 for (i=0; i<6; i++) 424 printf("%x ", edst[i] & 0xff); 425 printf("\n"); 426 } 427 #endif 428 } break; 429 #endif /* ISO */ 430 431 case pseudo_AF_HDRCMPLT: 432 hdrcmplt = 1; 433 memcpy(esrc, 434 ((const struct ether_header *)dst->sa_data)->ether_shost, 435 sizeof(esrc)); 436 /* FALLTHROUGH */ 437 438 case AF_UNSPEC: 439 memcpy(edst, 440 ((const struct ether_header *)dst->sa_data)->ether_dhost, 441 sizeof(edst)); 442 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */ 443 etype = ((const struct ether_header *)dst->sa_data)->ether_type; 444 break; 445 446 default: 447 printf("%s: can't handle af%d\n", ifp->if_xname, 448 dst->sa_family); 449 senderr(EAFNOSUPPORT); 450 } 451 452 if (mcopy) 453 (void)looutput(ifp, mcopy, dst, rt); 454 455 /* If no ether type is set, this must be a 802.2 formatted packet. 456 */ 457 if (etype == 0) 458 etype = htons(m->m_pkthdr.len); 459 /* 460 * Add local net header. If no space in first mbuf, 461 * allocate another. 462 */ 463 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT); 464 if (m == 0) 465 senderr(ENOBUFS); 466 eh = mtod(m, struct ether_header *); 467 /* Note: etype is already in network byte order. */ 468 (void)memcpy(&eh->ether_type, &etype, sizeof(eh->ether_type)); 469 memcpy(eh->ether_dhost, edst, sizeof(edst)); 470 if (hdrcmplt) 471 memcpy(eh->ether_shost, esrc, sizeof(eh->ether_shost)); 472 else 473 memcpy(eh->ether_shost, CLLADDR(ifp->if_sadl), 474 sizeof(eh->ether_shost)); 475 476 #if NCARP > 0 477 if (ifp0 != ifp && ifp0->if_type == IFT_CARP) { 478 memcpy(eh->ether_shost, CLLADDR(ifp0->if_sadl), 479 sizeof(eh->ether_shost)); 480 } 481 #endif /* NCARP > 0 */ 482 483 #ifdef PFIL_HOOKS 484 if ((error = pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0) 485 return (error); 486 if (m == NULL) 487 return (0); 488 #endif 489 490 #if NBRIDGE > 0 491 /* 492 * Bridges require special output handling. 493 */ 494 if (ifp->if_bridge) 495 return (bridge_output(ifp, m, NULL, NULL)); 496 #endif 497 498 #if NCARP > 0 499 if (ifp != ifp0) 500 ifp0->if_obytes += m->m_pkthdr.len + ETHER_HDR_LEN; 501 #endif /* NCARP > 0 */ 502 503 #ifdef ALTQ 504 /* 505 * If ALTQ is enabled on the parent interface, do 506 * classification; the queueing discipline might not 507 * require classification, but might require the 508 * address family/header pointer in the pktattr. 509 */ 510 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 511 altq_etherclassify(&ifp->if_snd, m, &pktattr); 512 #endif 513 514 return ifq_enqueue(ifp, m ALTQ_COMMA ALTQ_DECL(&pktattr)); 515 516 bad: 517 if (m) 518 m_freem(m); 519 return (error); 520 } 521 522 #ifdef ALTQ 523 /* 524 * This routine is a slight hack to allow a packet to be classified 525 * if the Ethernet headers are present. It will go away when ALTQ's 526 * classification engine understands link headers. 527 */ 528 void 529 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m, 530 struct altq_pktattr *pktattr) 531 { 532 struct ether_header *eh; 533 uint16_t ether_type; 534 int hlen, af, hdrsize; 535 void *hdr; 536 537 hlen = ETHER_HDR_LEN; 538 eh = mtod(m, struct ether_header *); 539 540 ether_type = htons(eh->ether_type); 541 542 if (ether_type < ETHERMTU) { 543 /* LLC/SNAP */ 544 struct llc *llc = (struct llc *)(eh + 1); 545 hlen += 8; 546 547 if (m->m_len < hlen || 548 llc->llc_dsap != LLC_SNAP_LSAP || 549 llc->llc_ssap != LLC_SNAP_LSAP || 550 llc->llc_control != LLC_UI) { 551 /* Not SNAP. */ 552 goto bad; 553 } 554 555 ether_type = htons(llc->llc_un.type_snap.ether_type); 556 } 557 558 switch (ether_type) { 559 case ETHERTYPE_IP: 560 af = AF_INET; 561 hdrsize = 20; /* sizeof(struct ip) */ 562 break; 563 564 case ETHERTYPE_IPV6: 565 af = AF_INET6; 566 hdrsize = 40; /* sizeof(struct ip6_hdr) */ 567 break; 568 569 default: 570 af = AF_UNSPEC; 571 hdrsize = 0; 572 break; 573 } 574 575 while (m->m_len <= hlen) { 576 hlen -= m->m_len; 577 m = m->m_next; 578 } 579 if (m->m_len < (hlen + hdrsize)) { 580 /* 581 * protocol header not in a single mbuf. 582 * We can't cope with this situation right 583 * now (but it shouldn't ever happen, really, anyhow). 584 */ 585 #ifdef DEBUG 586 printf("altq_etherclassify: headers span multiple mbufs: " 587 "%d < %d\n", m->m_len, (hlen + hdrsize)); 588 #endif 589 goto bad; 590 } 591 592 m->m_data += hlen; 593 m->m_len -= hlen; 594 595 hdr = mtod(m, void *); 596 597 if (ALTQ_NEEDS_CLASSIFY(ifq)) 598 pktattr->pattr_class = 599 (*ifq->altq_classify)(ifq->altq_clfier, m, af); 600 pktattr->pattr_af = af; 601 pktattr->pattr_hdr = hdr; 602 603 m->m_data -= hlen; 604 m->m_len += hlen; 605 606 return; 607 608 bad: 609 pktattr->pattr_class = NULL; 610 pktattr->pattr_hdr = NULL; 611 pktattr->pattr_af = AF_UNSPEC; 612 } 613 #endif /* ALTQ */ 614 615 /* 616 * Process a received Ethernet packet; 617 * the packet is in the mbuf chain m with 618 * the ether header. 619 */ 620 void 621 ether_input(struct ifnet *ifp, struct mbuf *m) 622 { 623 struct ethercom *ec = (struct ethercom *) ifp; 624 struct ifqueue *inq; 625 uint16_t etype; 626 struct ether_header *eh; 627 #if defined (ISO) || defined (LLC) || defined(NETATALK) 628 struct llc *l; 629 #endif 630 631 if ((ifp->if_flags & IFF_UP) == 0) { 632 m_freem(m); 633 return; 634 } 635 636 #ifdef MBUFTRACE 637 m_claimm(m, &ec->ec_rx_mowner); 638 #endif 639 eh = mtod(m, struct ether_header *); 640 etype = ntohs(eh->ether_type); 641 642 /* 643 * Determine if the packet is within its size limits. 644 */ 645 if (m->m_pkthdr.len > 646 ETHER_MAX_FRAME(ifp, etype, m->m_flags & M_HASFCS)) { 647 if (ppsratecheck(&bigpktppslim_last, &bigpktpps_count, 648 bigpktppslim)) { 649 printf("%s: discarding oversize frame (len=%d)\n", 650 ifp->if_xname, m->m_pkthdr.len); 651 } 652 m_freem(m); 653 return; 654 } 655 656 if (ETHER_IS_MULTICAST(eh->ether_dhost)) { 657 /* 658 * If this is not a simplex interface, drop the packet 659 * if it came from us. 660 */ 661 if ((ifp->if_flags & IFF_SIMPLEX) == 0 && 662 memcmp(CLLADDR(ifp->if_sadl), eh->ether_shost, 663 ETHER_ADDR_LEN) == 0) { 664 m_freem(m); 665 return; 666 } 667 668 if (memcmp(etherbroadcastaddr, 669 eh->ether_dhost, ETHER_ADDR_LEN) == 0) 670 m->m_flags |= M_BCAST; 671 else 672 m->m_flags |= M_MCAST; 673 ifp->if_imcasts++; 674 } 675 676 /* If the CRC is still on the packet, trim it off. */ 677 if (m->m_flags & M_HASFCS) { 678 m_adj(m, -ETHER_CRC_LEN); 679 m->m_flags &= ~M_HASFCS; 680 } 681 682 ifp->if_ibytes += m->m_pkthdr.len; 683 684 #if NBRIDGE > 0 685 /* 686 * Tap the packet off here for a bridge. bridge_input() 687 * will return NULL if it has consumed the packet, otherwise 688 * it gets processed as normal. Note that bridge_input() 689 * will always return the original packet if we need to 690 * process it locally. 691 */ 692 if (ifp->if_bridge) { 693 /* clear M_PROMISC, in case the packets comes from a vlan */ 694 m->m_flags &= ~M_PROMISC; 695 m = bridge_input(ifp, m); 696 if (m == NULL) 697 return; 698 699 /* 700 * Bridge has determined that the packet is for us. 701 * Update our interface pointer -- we may have had 702 * to "bridge" the packet locally. 703 */ 704 ifp = m->m_pkthdr.rcvif; 705 } else 706 #endif /* NBRIDGE > 0 */ 707 { 708 709 #if NCARP > 0 710 if (__predict_false(ifp->if_carp && ifp->if_type != IFT_CARP)) { 711 /* 712 * clear M_PROMISC, in case the packets comes from a 713 * vlan 714 */ 715 m->m_flags &= ~M_PROMISC; 716 if (carp_input(m, (uint8_t *)&eh->ether_shost, 717 (uint8_t *)&eh->ether_dhost, eh->ether_type) == 0) 718 return; 719 } 720 #endif /* NCARP > 0 */ 721 if ((m->m_flags & (M_BCAST|M_MCAST|M_PROMISC)) == 0 && 722 (ifp->if_flags & IFF_PROMISC) != 0 && 723 memcmp(CLLADDR(ifp->if_sadl), eh->ether_dhost, 724 ETHER_ADDR_LEN) != 0) { 725 m->m_flags |= M_PROMISC; 726 } 727 } 728 729 #ifdef PFIL_HOOKS 730 if ((m->m_flags & M_PROMISC) == 0) { 731 if (pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_IN) != 0) 732 return; 733 if (m == NULL) 734 return; 735 736 eh = mtod(m, struct ether_header *); 737 etype = ntohs(eh->ether_type); 738 } 739 #endif 740 741 #if NAGR > 0 742 if (ifp->if_agrprivate && 743 __predict_true(etype != ETHERTYPE_SLOWPROTOCOLS)) { 744 m->m_flags &= ~M_PROMISC; 745 agr_input(ifp, m); 746 return; 747 } 748 #endif /* NAGR > 0 */ 749 750 /* 751 * If VLANs are configured on the interface, check to 752 * see if the device performed the decapsulation and 753 * provided us with the tag. 754 */ 755 if (ec->ec_nvlans && m_tag_find(m, PACKET_TAG_VLAN, NULL) != NULL) { 756 #if NVLAN > 0 757 /* 758 * vlan_input() will either recursively call ether_input() 759 * or drop the packet. 760 */ 761 vlan_input(ifp, m); 762 #else 763 m_freem(m); 764 #endif 765 return; 766 } 767 768 /* 769 * Handle protocols that expect to have the Ethernet header 770 * (and possibly FCS) intact. 771 */ 772 switch (etype) { 773 #if NVLAN > 0 774 case ETHERTYPE_VLAN: 775 /* 776 * vlan_input() will either recursively call ether_input() 777 * or drop the packet. 778 */ 779 if (((struct ethercom *)ifp)->ec_nvlans != 0) 780 vlan_input(ifp, m); 781 else 782 m_freem(m); 783 return; 784 #endif /* NVLAN > 0 */ 785 #if NPPPOE > 0 786 case ETHERTYPE_PPPOEDISC: 787 case ETHERTYPE_PPPOE: 788 if (m->m_flags & M_PROMISC) { 789 m_freem(m); 790 return; 791 } 792 #ifndef PPPOE_SERVER 793 if (m->m_flags & (M_MCAST | M_BCAST)) { 794 m_freem(m); 795 return; 796 } 797 #endif 798 799 if (etype == ETHERTYPE_PPPOEDISC) 800 inq = &ppoediscinq; 801 else 802 inq = &ppoeinq; 803 if (IF_QFULL(inq)) { 804 IF_DROP(inq); 805 m_freem(m); 806 } else 807 IF_ENQUEUE(inq, m); 808 softint_schedule(pppoe_softintr); 809 return; 810 #endif /* NPPPOE > 0 */ 811 case ETHERTYPE_SLOWPROTOCOLS: { 812 uint8_t subtype; 813 814 #if defined(DIAGNOSTIC) 815 if (m->m_pkthdr.len < sizeof(*eh) + sizeof(subtype)) { 816 panic("ether_input: too short slow protocol packet"); 817 } 818 #endif 819 m_copydata(m, sizeof(*eh), sizeof(subtype), &subtype); 820 switch (subtype) { 821 #if NAGR > 0 822 case SLOWPROTOCOLS_SUBTYPE_LACP: 823 if (ifp->if_agrprivate) { 824 ieee8023ad_lacp_input(ifp, m); 825 return; 826 } 827 break; 828 829 case SLOWPROTOCOLS_SUBTYPE_MARKER: 830 if (ifp->if_agrprivate) { 831 ieee8023ad_marker_input(ifp, m); 832 return; 833 } 834 break; 835 #endif /* NAGR > 0 */ 836 default: 837 if (subtype == 0 || subtype > 10) { 838 /* illegal value */ 839 m_freem(m); 840 return; 841 } 842 /* unknown subtype */ 843 break; 844 } 845 /* FALLTHROUGH */ 846 } 847 default: 848 if (m->m_flags & M_PROMISC) { 849 m_freem(m); 850 return; 851 } 852 } 853 854 /* If the CRC is still on the packet, trim it off. */ 855 if (m->m_flags & M_HASFCS) { 856 m_adj(m, -ETHER_CRC_LEN); 857 m->m_flags &= ~M_HASFCS; 858 } 859 860 if (etype > ETHERMTU + sizeof (struct ether_header)) { 861 /* Strip off the Ethernet header. */ 862 m_adj(m, sizeof(struct ether_header)); 863 864 switch (etype) { 865 #ifdef INET 866 case ETHERTYPE_IP: 867 #ifdef GATEWAY 868 if (ipflow_fastforward(m)) 869 return; 870 #endif 871 schednetisr(NETISR_IP); 872 inq = &ipintrq; 873 break; 874 875 case ETHERTYPE_ARP: 876 schednetisr(NETISR_ARP); 877 inq = &arpintrq; 878 break; 879 880 case ETHERTYPE_REVARP: 881 revarpinput(m); /* XXX queue? */ 882 return; 883 #endif 884 #ifdef INET6 885 case ETHERTYPE_IPV6: 886 #ifdef GATEWAY 887 if (ip6flow_fastforward(m)) 888 return; 889 #endif 890 schednetisr(NETISR_IPV6); 891 inq = &ip6intrq; 892 break; 893 #endif 894 #ifdef IPX 895 case ETHERTYPE_IPX: 896 schednetisr(NETISR_IPX); 897 inq = &ipxintrq; 898 break; 899 #endif 900 #ifdef NETATALK 901 case ETHERTYPE_ATALK: 902 schednetisr(NETISR_ATALK); 903 inq = &atintrq1; 904 break; 905 case ETHERTYPE_AARP: 906 /* probably this should be done with a NETISR as well */ 907 aarpinput(ifp, m); /* XXX */ 908 return; 909 #endif /* NETATALK */ 910 default: 911 m_freem(m); 912 return; 913 } 914 } else { 915 #if defined (ISO) || defined (LLC) || defined (NETATALK) 916 l = (struct llc *)(eh+1); 917 switch (l->llc_dsap) { 918 #ifdef NETATALK 919 case LLC_SNAP_LSAP: 920 switch (l->llc_control) { 921 case LLC_UI: 922 if (l->llc_ssap != LLC_SNAP_LSAP) { 923 goto dropanyway; 924 } 925 926 if (memcmp(&(l->llc_snap_org_code)[0], 927 at_org_code, sizeof(at_org_code)) == 0 && 928 ntohs(l->llc_snap_ether_type) == 929 ETHERTYPE_ATALK) { 930 inq = &atintrq2; 931 m_adj(m, sizeof(struct ether_header) 932 + sizeof(struct llc)); 933 schednetisr(NETISR_ATALK); 934 break; 935 } 936 937 if (memcmp(&(l->llc_snap_org_code)[0], 938 aarp_org_code, 939 sizeof(aarp_org_code)) == 0 && 940 ntohs(l->llc_snap_ether_type) == 941 ETHERTYPE_AARP) { 942 m_adj( m, sizeof(struct ether_header) 943 + sizeof(struct llc)); 944 aarpinput(ifp, m); /* XXX */ 945 return; 946 } 947 948 default: 949 goto dropanyway; 950 } 951 break; 952 #endif /* NETATALK */ 953 #ifdef ISO 954 case LLC_ISO_LSAP: 955 switch (l->llc_control) { 956 case LLC_UI: 957 /* LLC_UI_P forbidden in class 1 service */ 958 if ((l->llc_dsap == LLC_ISO_LSAP) && /* XXX? case tested */ 959 (l->llc_ssap == LLC_ISO_LSAP)) { 960 /* LSAP for ISO */ 961 /* XXX length computation?? */ 962 if (m->m_pkthdr.len > etype + sizeof(struct ether_header)) 963 m_adj(m, etype - m->m_pkthdr.len); 964 965 #ifdef ARGO_DEBUG 966 if (argo_debug[D_ETHER]) 967 printf("clnp packet"); 968 #endif 969 schednetisr(NETISR_ISO); 970 inq = &clnlintrq; 971 break; 972 } 973 goto dropanyway; 974 975 case LLC_XID: 976 case LLC_XID_P: 977 if(m->m_len < LLC_XID_BASIC_MINLEN + sizeof(struct ether_header)) 978 /* XXX m_pullup? */ 979 goto dropanyway; 980 l->llc_window = 0; 981 l->llc_fid = LLC_XID_FORMAT_BASIC; 982 l->llc_class = LLC_XID_CLASS_I; 983 l->llc_dsap = l->llc_ssap = 0; 984 /* Fall through to */ 985 case LLC_TEST: 986 case LLC_TEST_P: 987 { 988 struct sockaddr sa; 989 struct ether_header *eh2; 990 int i; 991 u_char c = l->llc_dsap; 992 993 l->llc_dsap = l->llc_ssap; 994 l->llc_ssap = c; 995 m_adj(m, sizeof(struct ether_header)); 996 /* XXX we can optimize here? */ 997 if (m->m_flags & (M_BCAST | M_MCAST)) 998 memcpy(eh->ether_dhost, 999 CLLADDR(ifp->if_sadl), 1000 ETHER_ADDR_LEN); 1001 sa.sa_family = AF_UNSPEC; 1002 sa.sa_len = sizeof(sa); 1003 eh2 = (struct ether_header *)sa.sa_data; 1004 for (i = 0; i < 6; i++) { 1005 eh2->ether_shost[i] = c = 1006 eh->ether_dhost[i]; 1007 eh2->ether_dhost[i] = 1008 eh->ether_dhost[i] = 1009 eh->ether_shost[i]; 1010 eh->ether_shost[i] = c; 1011 } 1012 ifp->if_output(ifp, m, &sa, NULL); 1013 return; 1014 } 1015 default: 1016 m_freem(m); 1017 return; 1018 } 1019 break; 1020 #endif /* ISO */ 1021 #if defined (ISO) || defined (NETATALK) 1022 dropanyway: 1023 #endif 1024 default: 1025 m_freem(m); 1026 return; 1027 } 1028 #else /* ISO || LLC || NETATALK*/ 1029 m_freem(m); 1030 return; 1031 #endif /* ISO || LLC || NETATALK*/ 1032 } 1033 1034 if (IF_QFULL(inq)) { 1035 IF_DROP(inq); 1036 m_freem(m); 1037 } else 1038 IF_ENQUEUE(inq, m); 1039 } 1040 1041 /* 1042 * Convert Ethernet address to printable (loggable) representation. 1043 */ 1044 char * 1045 ether_sprintf(const u_char *ap) 1046 { 1047 static char etherbuf[3 * ETHER_ADDR_LEN]; 1048 return ether_snprintf(etherbuf, sizeof(etherbuf), ap); 1049 } 1050 1051 char * 1052 ether_snprintf(char *buf, size_t len, const u_char *ap) 1053 { 1054 char *cp = buf; 1055 size_t i; 1056 1057 for (i = 0; i < len / 3; i++) { 1058 *cp++ = hexdigits[*ap >> 4]; 1059 *cp++ = hexdigits[*ap++ & 0xf]; 1060 *cp++ = ':'; 1061 } 1062 *--cp = '\0'; 1063 return buf; 1064 } 1065 1066 /* 1067 * Perform common duties while attaching to interface list 1068 */ 1069 void 1070 ether_ifattach(struct ifnet *ifp, const uint8_t *lla) 1071 { 1072 struct ethercom *ec = (struct ethercom *)ifp; 1073 1074 ifp->if_type = IFT_ETHER; 1075 ifp->if_hdrlen = ETHER_HDR_LEN; 1076 ifp->if_dlt = DLT_EN10MB; 1077 ifp->if_mtu = ETHERMTU; 1078 ifp->if_output = ether_output; 1079 ifp->if_input = ether_input; 1080 if (ifp->if_baudrate == 0) 1081 ifp->if_baudrate = IF_Mbps(10); /* just a default */ 1082 1083 if_set_sadl(ifp, lla, ETHER_ADDR_LEN, !ETHER_IS_LOCAL(lla)); 1084 1085 LIST_INIT(&ec->ec_multiaddrs); 1086 ifp->if_broadcastaddr = etherbroadcastaddr; 1087 #if NBPFILTER > 0 1088 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header)); 1089 #endif 1090 #ifdef MBUFTRACE 1091 strlcpy(ec->ec_tx_mowner.mo_name, ifp->if_xname, 1092 sizeof(ec->ec_tx_mowner.mo_name)); 1093 strlcpy(ec->ec_tx_mowner.mo_descr, "tx", 1094 sizeof(ec->ec_tx_mowner.mo_descr)); 1095 strlcpy(ec->ec_rx_mowner.mo_name, ifp->if_xname, 1096 sizeof(ec->ec_rx_mowner.mo_name)); 1097 strlcpy(ec->ec_rx_mowner.mo_descr, "rx", 1098 sizeof(ec->ec_rx_mowner.mo_descr)); 1099 MOWNER_ATTACH(&ec->ec_tx_mowner); 1100 MOWNER_ATTACH(&ec->ec_rx_mowner); 1101 ifp->if_mowner = &ec->ec_tx_mowner; 1102 #endif 1103 } 1104 1105 void 1106 ether_ifdetach(struct ifnet *ifp) 1107 { 1108 struct ethercom *ec = (void *) ifp; 1109 struct ether_multi *enm; 1110 int s; 1111 1112 #if NBRIDGE > 0 1113 if (ifp->if_bridge) 1114 bridge_ifdetach(ifp); 1115 #endif 1116 1117 #if NBPFILTER > 0 1118 bpfdetach(ifp); 1119 #endif 1120 1121 #if NVLAN > 0 1122 if (ec->ec_nvlans) 1123 vlan_ifdetach(ifp); 1124 #endif 1125 1126 s = splnet(); 1127 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) { 1128 LIST_REMOVE(enm, enm_list); 1129 free(enm, M_IFMADDR); 1130 ec->ec_multicnt--; 1131 } 1132 splx(s); 1133 1134 #if 0 /* done in if_detach() */ 1135 if_free_sadl(ifp); 1136 #endif 1137 1138 MOWNER_DETACH(&ec->ec_rx_mowner); 1139 MOWNER_DETACH(&ec->ec_tx_mowner); 1140 } 1141 1142 #if 0 1143 /* 1144 * This is for reference. We have a table-driven version 1145 * of the little-endian crc32 generator, which is faster 1146 * than the double-loop. 1147 */ 1148 uint32_t 1149 ether_crc32_le(const uint8_t *buf, size_t len) 1150 { 1151 uint32_t c, crc, carry; 1152 size_t i, j; 1153 1154 crc = 0xffffffffU; /* initial value */ 1155 1156 for (i = 0; i < len; i++) { 1157 c = buf[i]; 1158 for (j = 0; j < 8; j++) { 1159 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01); 1160 crc >>= 1; 1161 c >>= 1; 1162 if (carry) 1163 crc = (crc ^ ETHER_CRC_POLY_LE); 1164 } 1165 } 1166 1167 return (crc); 1168 } 1169 #else 1170 uint32_t 1171 ether_crc32_le(const uint8_t *buf, size_t len) 1172 { 1173 static const uint32_t crctab[] = { 1174 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 1175 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c, 1176 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 1177 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c 1178 }; 1179 uint32_t crc; 1180 size_t i; 1181 1182 crc = 0xffffffffU; /* initial value */ 1183 1184 for (i = 0; i < len; i++) { 1185 crc ^= buf[i]; 1186 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1187 crc = (crc >> 4) ^ crctab[crc & 0xf]; 1188 } 1189 1190 return (crc); 1191 } 1192 #endif 1193 1194 uint32_t 1195 ether_crc32_be(const uint8_t *buf, size_t len) 1196 { 1197 uint32_t c, crc, carry; 1198 size_t i, j; 1199 1200 crc = 0xffffffffU; /* initial value */ 1201 1202 for (i = 0; i < len; i++) { 1203 c = buf[i]; 1204 for (j = 0; j < 8; j++) { 1205 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01); 1206 crc <<= 1; 1207 c >>= 1; 1208 if (carry) 1209 crc = (crc ^ ETHER_CRC_POLY_BE) | carry; 1210 } 1211 } 1212 1213 return (crc); 1214 } 1215 1216 #ifdef INET 1217 const uint8_t ether_ipmulticast_min[ETHER_ADDR_LEN] = 1218 { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; 1219 const uint8_t ether_ipmulticast_max[ETHER_ADDR_LEN] = 1220 { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; 1221 #endif 1222 #ifdef INET6 1223 const uint8_t ether_ip6multicast_min[ETHER_ADDR_LEN] = 1224 { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 }; 1225 const uint8_t ether_ip6multicast_max[ETHER_ADDR_LEN] = 1226 { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff }; 1227 #endif 1228 1229 /* 1230 * ether_aton implementation, not using a static buffer. 1231 */ 1232 int 1233 ether_nonstatic_aton(u_char *dest, char *str) 1234 { 1235 int i; 1236 char *cp = str; 1237 u_char val[6]; 1238 1239 #define set_value \ 1240 if (*cp > '9' && *cp < 'a') \ 1241 *cp -= 'A' - 10; \ 1242 else if (*cp > '9') \ 1243 *cp -= 'a' - 10; \ 1244 else \ 1245 *cp -= '0' 1246 1247 for (i = 0; i < 6; i++, cp++) { 1248 if (!isxdigit(*cp)) 1249 return (1); 1250 set_value; 1251 val[i] = *cp++; 1252 if (isxdigit(*cp)) { 1253 set_value; 1254 val[i] *= 16; 1255 val[i] += *cp++; 1256 } 1257 if (*cp == ':' || i == 5) 1258 continue; 1259 else 1260 return 1; 1261 } 1262 memcpy(dest, val, 6); 1263 1264 return 0; 1265 } 1266 1267 1268 /* 1269 * Convert a sockaddr into an Ethernet address or range of Ethernet 1270 * addresses. 1271 */ 1272 int 1273 ether_multiaddr(const struct sockaddr *sa, uint8_t addrlo[ETHER_ADDR_LEN], 1274 uint8_t addrhi[ETHER_ADDR_LEN]) 1275 { 1276 #ifdef INET 1277 const struct sockaddr_in *sin; 1278 #endif /* INET */ 1279 #ifdef INET6 1280 const struct sockaddr_in6 *sin6; 1281 #endif /* INET6 */ 1282 1283 switch (sa->sa_family) { 1284 1285 case AF_UNSPEC: 1286 memcpy(addrlo, sa->sa_data, ETHER_ADDR_LEN); 1287 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1288 break; 1289 1290 #ifdef INET 1291 case AF_INET: 1292 sin = satocsin(sa); 1293 if (sin->sin_addr.s_addr == INADDR_ANY) { 1294 /* 1295 * An IP address of INADDR_ANY means listen to 1296 * or stop listening to all of the Ethernet 1297 * multicast addresses used for IP. 1298 * (This is for the sake of IP multicast routers.) 1299 */ 1300 memcpy(addrlo, ether_ipmulticast_min, ETHER_ADDR_LEN); 1301 memcpy(addrhi, ether_ipmulticast_max, ETHER_ADDR_LEN); 1302 } 1303 else { 1304 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); 1305 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1306 } 1307 break; 1308 #endif 1309 #ifdef INET6 1310 case AF_INET6: 1311 sin6 = satocsin6(sa); 1312 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 1313 /* 1314 * An IP6 address of 0 means listen to or stop 1315 * listening to all of the Ethernet multicast 1316 * address used for IP6. 1317 * (This is used for multicast routers.) 1318 */ 1319 memcpy(addrlo, ether_ip6multicast_min, ETHER_ADDR_LEN); 1320 memcpy(addrhi, ether_ip6multicast_max, ETHER_ADDR_LEN); 1321 } else { 1322 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo); 1323 memcpy(addrhi, addrlo, ETHER_ADDR_LEN); 1324 } 1325 break; 1326 #endif 1327 1328 default: 1329 return EAFNOSUPPORT; 1330 } 1331 return 0; 1332 } 1333 1334 /* 1335 * Add an Ethernet multicast address or range of addresses to the list for a 1336 * given interface. 1337 */ 1338 int 1339 ether_addmulti(const struct sockaddr *sa, struct ethercom *ec) 1340 { 1341 struct ether_multi *enm; 1342 u_char addrlo[ETHER_ADDR_LEN]; 1343 u_char addrhi[ETHER_ADDR_LEN]; 1344 int s = splnet(), error; 1345 1346 error = ether_multiaddr(sa, addrlo, addrhi); 1347 if (error != 0) { 1348 splx(s); 1349 return error; 1350 } 1351 1352 /* 1353 * Verify that we have valid Ethernet multicast addresses. 1354 */ 1355 if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) { 1356 splx(s); 1357 return EINVAL; 1358 } 1359 /* 1360 * See if the address range is already in the list. 1361 */ 1362 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1363 if (enm != NULL) { 1364 /* 1365 * Found it; just increment the reference count. 1366 */ 1367 ++enm->enm_refcount; 1368 splx(s); 1369 return 0; 1370 } 1371 /* 1372 * New address or range; malloc a new multicast record 1373 * and link it into the interface's multicast list. 1374 */ 1375 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT); 1376 if (enm == NULL) { 1377 splx(s); 1378 return ENOBUFS; 1379 } 1380 memcpy(enm->enm_addrlo, addrlo, 6); 1381 memcpy(enm->enm_addrhi, addrhi, 6); 1382 enm->enm_refcount = 1; 1383 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list); 1384 ec->ec_multicnt++; 1385 splx(s); 1386 /* 1387 * Return ENETRESET to inform the driver that the list has changed 1388 * and its reception filter should be adjusted accordingly. 1389 */ 1390 return ENETRESET; 1391 } 1392 1393 /* 1394 * Delete a multicast address record. 1395 */ 1396 int 1397 ether_delmulti(const struct sockaddr *sa, struct ethercom *ec) 1398 { 1399 struct ether_multi *enm; 1400 u_char addrlo[ETHER_ADDR_LEN]; 1401 u_char addrhi[ETHER_ADDR_LEN]; 1402 int s = splnet(), error; 1403 1404 error = ether_multiaddr(sa, addrlo, addrhi); 1405 if (error != 0) { 1406 splx(s); 1407 return (error); 1408 } 1409 1410 /* 1411 * Look ur the address in our list. 1412 */ 1413 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm); 1414 if (enm == NULL) { 1415 splx(s); 1416 return (ENXIO); 1417 } 1418 if (--enm->enm_refcount != 0) { 1419 /* 1420 * Still some claims to this record. 1421 */ 1422 splx(s); 1423 return (0); 1424 } 1425 /* 1426 * No remaining claims to this record; unlink and free it. 1427 */ 1428 LIST_REMOVE(enm, enm_list); 1429 free(enm, M_IFMADDR); 1430 ec->ec_multicnt--; 1431 splx(s); 1432 /* 1433 * Return ENETRESET to inform the driver that the list has changed 1434 * and its reception filter should be adjusted accordingly. 1435 */ 1436 return (ENETRESET); 1437 } 1438 1439 void 1440 ether_set_ifflags_cb(struct ethercom *ec, ether_cb_t cb) 1441 { 1442 ec->ec_ifflags_cb = cb; 1443 } 1444 1445 /* 1446 * Common ioctls for Ethernet interfaces. Note, we must be 1447 * called at splnet(). 1448 */ 1449 int 1450 ether_ioctl(struct ifnet *ifp, u_long cmd, void *data) 1451 { 1452 struct ethercom *ec = (void *) ifp; 1453 struct ifreq *ifr = (struct ifreq *)data; 1454 struct if_laddrreq *iflr = data; 1455 const struct sockaddr_dl *sdl; 1456 static const uint8_t zero[ETHER_ADDR_LEN]; 1457 int error; 1458 1459 switch (cmd) { 1460 case SIOCINITIFADDR: 1461 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != 1462 (IFF_UP|IFF_RUNNING)) { 1463 ifp->if_flags |= IFF_UP; 1464 if ((error = (*ifp->if_init)(ifp)) != 0) 1465 return error; 1466 } 1467 #ifdef INET 1468 { 1469 struct ifaddr *ifa = (struct ifaddr *)data; 1470 1471 if (ifa->ifa_addr->sa_family == AF_INET) 1472 arp_ifinit(ifp, ifa); 1473 } 1474 #endif /* INET */ 1475 return 0; 1476 1477 case SIOCSIFMTU: 1478 { 1479 int maxmtu; 1480 1481 if (ec->ec_capabilities & ETHERCAP_JUMBO_MTU) 1482 maxmtu = ETHERMTU_JUMBO; 1483 else 1484 maxmtu = ETHERMTU; 1485 1486 if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > maxmtu) 1487 return EINVAL; 1488 else if ((error = ifioctl_common(ifp, cmd, data)) != ENETRESET) 1489 return error; 1490 else if (ifp->if_flags & IFF_UP) { 1491 /* Make sure the device notices the MTU change. */ 1492 return (*ifp->if_init)(ifp); 1493 } else 1494 return 0; 1495 } 1496 1497 case SIOCSIFFLAGS: 1498 if ((error = ifioctl_common(ifp, cmd, data)) != 0) 1499 return error; 1500 switch (ifp->if_flags & (IFF_UP|IFF_RUNNING)) { 1501 case IFF_RUNNING: 1502 /* 1503 * If interface is marked down and it is running, 1504 * then stop and disable it. 1505 */ 1506 (*ifp->if_stop)(ifp, 1); 1507 break; 1508 case IFF_UP: 1509 /* 1510 * If interface is marked up and it is stopped, then 1511 * start it. 1512 */ 1513 return (*ifp->if_init)(ifp); 1514 case IFF_UP|IFF_RUNNING: 1515 error = 0; 1516 if (ec->ec_ifflags_cb == NULL || 1517 (error = (*ec->ec_ifflags_cb)(ec)) == ENETRESET) { 1518 /* 1519 * Reset the interface to pick up 1520 * changes in any other flags that 1521 * affect the hardware state. 1522 */ 1523 return (*ifp->if_init)(ifp); 1524 } else 1525 return error; 1526 case 0: 1527 break; 1528 } 1529 return 0; 1530 case SIOCADDMULTI: 1531 return ether_addmulti(ifreq_getaddr(cmd, ifr), ec); 1532 case SIOCDELMULTI: 1533 return ether_delmulti(ifreq_getaddr(cmd, ifr), ec); 1534 case SIOCSIFMEDIA: 1535 case SIOCGIFMEDIA: 1536 if (ec->ec_mii == NULL) 1537 return ENOTTY; 1538 return ifmedia_ioctl(ifp, ifr, &ec->ec_mii->mii_media, cmd); 1539 case SIOCALIFADDR: 1540 sdl = satocsdl(sstocsa(&iflr->addr)); 1541 if (sdl->sdl_family != AF_LINK) 1542 ; 1543 else if (ETHER_IS_MULTICAST(CLLADDR(sdl))) 1544 return EINVAL; 1545 else if (memcmp(zero, CLLADDR(sdl), sizeof(zero)) == 0) 1546 return EINVAL; 1547 /*FALLTHROUGH*/ 1548 default: 1549 return ifioctl_common(ifp, cmd, data); 1550 } 1551 return 0; 1552 } 1553
Indexes created Mon Sep 22 13:09:51 GMT 2025