if_fwsubr.c revision 172930
1139823Simp/*- 2130407Sdfr * Copyright (c) 2004 Doug Rabson 3130407Sdfr * Copyright (c) 1982, 1989, 1993 4130407Sdfr * The Regents of the University of California. All rights reserved. 5130407Sdfr * 6130407Sdfr * Redistribution and use in source and binary forms, with or without 7130407Sdfr * modification, are permitted provided that the following conditions 8130407Sdfr * are met: 9130407Sdfr * 1. Redistributions of source code must retain the above copyright 10130407Sdfr * notice, this list of conditions and the following disclaimer. 11130407Sdfr * 2. Redistributions in binary form must reproduce the above copyright 12130407Sdfr * notice, this list of conditions and the following disclaimer in the 13130407Sdfr * documentation and/or other materials provided with the distribution. 14130407Sdfr * 4. Neither the name of the University nor the names of its contributors 15130407Sdfr * may be used to endorse or promote products derived from this software 16130407Sdfr * without specific prior written permission. 17130407Sdfr * 18130407Sdfr * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19130407Sdfr * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20130407Sdfr * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21130407Sdfr * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22130407Sdfr * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23130407Sdfr * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24130407Sdfr * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25130407Sdfr * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26130407Sdfr * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27130407Sdfr * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28130407Sdfr * SUCH DAMAGE. 29130407Sdfr * 30130407Sdfr * $FreeBSD: head/sys/net/if_fwsubr.c 172930 2007-10-24 19:04:04Z rwatson $ 31130407Sdfr */ 32130407Sdfr 33130407Sdfr#include "opt_inet.h" 34130407Sdfr#include "opt_inet6.h" 35131177Spjd#include "opt_mac.h" 36130407Sdfr 37130407Sdfr#include <sys/param.h> 38130407Sdfr#include <sys/systm.h> 39130407Sdfr#include <sys/kernel.h> 40130407Sdfr#include <sys/malloc.h> 41130407Sdfr#include <sys/mbuf.h> 42147256Sbrooks#include <sys/module.h> 43130407Sdfr#include <sys/socket.h> 44130407Sdfr#include <sys/sockio.h> 45130407Sdfr 46130407Sdfr#include <net/if.h> 47130407Sdfr#include <net/netisr.h> 48130407Sdfr#include <net/route.h> 49130407Sdfr#include <net/if_llc.h> 50130407Sdfr#include <net/if_dl.h> 51130407Sdfr#include <net/if_types.h> 52130407Sdfr#include <net/bpf.h> 53130407Sdfr#include <net/firewire.h> 54130407Sdfr 55130407Sdfr#if defined(INET) || defined(INET6) 56130407Sdfr#include <netinet/in.h> 57130407Sdfr#include <netinet/in_var.h> 58130407Sdfr#include <netinet/if_ether.h> 59130407Sdfr#endif 60130407Sdfr#ifdef INET6 61130407Sdfr#include <netinet6/nd6.h> 62130407Sdfr#endif 63130407Sdfr 64163606Srwatson#include <security/mac/mac_framework.h> 65163606Srwatson 66147256SbrooksMALLOC_DEFINE(M_FWCOM, "fw_com", "firewire interface internals"); 67147256Sbrooks 68130407Sdfrstruct fw_hwaddr firewire_broadcastaddr = { 69130407Sdfr 0xffffffff, 70130407Sdfr 0xffffffff, 71130407Sdfr 0xff, 72130407Sdfr 0xff, 73130407Sdfr 0xffff, 74130407Sdfr 0xffffffff 75130407Sdfr}; 76130407Sdfr 77130407Sdfrstatic int 78130407Sdfrfirewire_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, 79130407Sdfr struct rtentry *rt0) 80130407Sdfr{ 81154209Sbrooks struct fw_com *fc = IFP2FWC(ifp); 82130407Sdfr int error, type; 83148954Sglebius struct rtentry *rt = NULL; 84130407Sdfr struct m_tag *mtag; 85130407Sdfr union fw_encap *enc; 86130407Sdfr struct fw_hwaddr *destfw; 87130407Sdfr uint8_t speed; 88130407Sdfr uint16_t psize, fsize, dsize; 89130407Sdfr struct mbuf *mtail; 90130407Sdfr int unicast, dgl, foff; 91130407Sdfr static int next_dgl; 92130407Sdfr 93130429Sdfr#ifdef MAC 94172930Srwatson error = mac_ifnet_check_transmit(ifp, m); 95130429Sdfr if (error) 96130429Sdfr goto bad; 97130429Sdfr#endif 98130429Sdfr 99148887Srwatson if (!((ifp->if_flags & IFF_UP) && 100148887Srwatson (ifp->if_drv_flags & IFF_DRV_RUNNING))) { 101130407Sdfr error = ENETDOWN; 102130407Sdfr goto bad; 103130407Sdfr } 104130407Sdfr 105148954Sglebius if (rt0 != NULL) { 106148954Sglebius error = rt_check(&rt, &rt0, dst); 107148954Sglebius if (error) 108148954Sglebius goto bad; 109148954Sglebius RT_UNLOCK(rt); 110148954Sglebius } 111130407Sdfr 112130407Sdfr /* 113130407Sdfr * For unicast, we make a tag to store the lladdr of the 114130407Sdfr * destination. This might not be the first time we have seen 115130407Sdfr * the packet (for instance, the arp code might be trying to 116130407Sdfr * re-send it after receiving an arp reply) so we only 117130407Sdfr * allocate a tag if there isn't one there already. For 118130407Sdfr * multicast, we will eventually use a different tag to store 119130407Sdfr * the channel number. 120130407Sdfr */ 121130407Sdfr unicast = !(m->m_flags & (M_BCAST | M_MCAST)); 122130407Sdfr if (unicast) { 123130407Sdfr mtag = m_tag_locate(m, MTAG_FIREWIRE, MTAG_FIREWIRE_HWADDR, NULL); 124130407Sdfr if (!mtag) { 125130407Sdfr mtag = m_tag_alloc(MTAG_FIREWIRE, MTAG_FIREWIRE_HWADDR, 126130407Sdfr sizeof (struct fw_hwaddr), M_NOWAIT); 127130407Sdfr if (!mtag) { 128130407Sdfr error = ENOMEM; 129130407Sdfr goto bad; 130130407Sdfr } 131130407Sdfr m_tag_prepend(m, mtag); 132130407Sdfr } 133130407Sdfr destfw = (struct fw_hwaddr *)(mtag + 1); 134130407Sdfr } else { 135130407Sdfr destfw = 0; 136130407Sdfr } 137130407Sdfr 138130407Sdfr switch (dst->sa_family) { 139130407Sdfr#ifdef AF_INET 140130407Sdfr case AF_INET: 141130407Sdfr /* 142130407Sdfr * Only bother with arp for unicast. Allocation of 143130407Sdfr * channels etc. for firewire is quite different and 144130407Sdfr * doesn't fit into the arp model. 145130407Sdfr */ 146130407Sdfr if (unicast) { 147130407Sdfr error = arpresolve(ifp, rt, m, dst, (u_char *) destfw); 148130407Sdfr if (error) 149130407Sdfr return (error == EWOULDBLOCK ? 0 : error); 150130407Sdfr } 151130407Sdfr type = ETHERTYPE_IP; 152130407Sdfr break; 153130407Sdfr 154130407Sdfr case AF_ARP: 155130407Sdfr { 156130407Sdfr struct arphdr *ah; 157130407Sdfr ah = mtod(m, struct arphdr *); 158130407Sdfr ah->ar_hrd = htons(ARPHRD_IEEE1394); 159130407Sdfr type = ETHERTYPE_ARP; 160130407Sdfr if (unicast) 161130407Sdfr *destfw = *(struct fw_hwaddr *) ar_tha(ah); 162130407Sdfr 163130407Sdfr /* 164130407Sdfr * The standard arp code leaves a hole for the target 165130407Sdfr * hardware address which we need to close up. 166130407Sdfr */ 167130407Sdfr bcopy(ar_tpa(ah), ar_tha(ah), ah->ar_pln); 168130407Sdfr m_adj(m, -ah->ar_hln); 169130407Sdfr break; 170130407Sdfr } 171130407Sdfr#endif 172130407Sdfr 173130407Sdfr#ifdef INET6 174130407Sdfr case AF_INET6: 175130407Sdfr if (unicast) { 176147256Sbrooks error = nd6_storelladdr(fc->fc_ifp, rt, m, dst, 177130407Sdfr (u_char *) destfw); 178130407Sdfr if (error) 179130407Sdfr return (error); 180130407Sdfr } 181130407Sdfr type = ETHERTYPE_IPV6; 182130407Sdfr break; 183130407Sdfr#endif 184130407Sdfr 185130407Sdfr default: 186130407Sdfr if_printf(ifp, "can't handle af%d\n", dst->sa_family); 187130407Sdfr error = EAFNOSUPPORT; 188130407Sdfr goto bad; 189130407Sdfr } 190130407Sdfr 191130407Sdfr /* 192130407Sdfr * Let BPF tap off a copy before we encapsulate. 193130407Sdfr */ 194159183Ssam if (bpf_peers_present(ifp->if_bpf)) { 195130407Sdfr struct fw_bpfhdr h; 196130407Sdfr if (unicast) 197130407Sdfr bcopy(destfw, h.firewire_dhost, 8); 198130407Sdfr else 199130407Sdfr bcopy(&firewire_broadcastaddr, h.firewire_dhost, 8); 200130407Sdfr bcopy(&fc->fc_hwaddr, h.firewire_shost, 8); 201130407Sdfr h.firewire_type = htons(type); 202130407Sdfr bpf_mtap2(ifp->if_bpf, &h, sizeof(h), m); 203130407Sdfr } 204130407Sdfr 205130407Sdfr /* 206130407Sdfr * Punt on MCAP for now and send all multicast packets on the 207130407Sdfr * broadcast channel. 208130407Sdfr */ 209130407Sdfr if (m->m_flags & M_MCAST) 210130407Sdfr m->m_flags |= M_BCAST; 211130407Sdfr 212130407Sdfr /* 213130407Sdfr * Figure out what speed to use and what the largest supported 214130407Sdfr * packet size is. For unicast, this is the minimum of what we 215130407Sdfr * can speak and what they can hear. For broadcast, lets be 216130407Sdfr * conservative and use S100. We could possibly improve that 217130407Sdfr * by examining the bus manager's speed map or similar. We 218130407Sdfr * also reduce the packet size for broadcast to account for 219130407Sdfr * the GASP header. 220130407Sdfr */ 221130407Sdfr if (unicast) { 222130407Sdfr speed = min(fc->fc_speed, destfw->sspd); 223130407Sdfr psize = min(512 << speed, 2 << destfw->sender_max_rec); 224130407Sdfr } else { 225130407Sdfr speed = 0; 226130407Sdfr psize = 512 - 2*sizeof(uint32_t); 227130407Sdfr } 228130407Sdfr 229130407Sdfr /* 230130407Sdfr * Next, we encapsulate, possibly fragmenting the original 231130407Sdfr * datagram if it won't fit into a single packet. 232130407Sdfr */ 233130407Sdfr if (m->m_pkthdr.len <= psize - sizeof(uint32_t)) { 234130407Sdfr /* 235130407Sdfr * No fragmentation is necessary. 236130407Sdfr */ 237130407Sdfr M_PREPEND(m, sizeof(uint32_t), M_DONTWAIT); 238130407Sdfr if (!m) { 239130407Sdfr error = ENOBUFS; 240130407Sdfr goto bad; 241130407Sdfr } 242130407Sdfr enc = mtod(m, union fw_encap *); 243130407Sdfr enc->unfrag.ether_type = type; 244130407Sdfr enc->unfrag.lf = FW_ENCAP_UNFRAG; 245144114Sgallatin enc->unfrag.reserved = 0; 246130407Sdfr 247130407Sdfr /* 248130407Sdfr * Byte swap the encapsulation header manually. 249130407Sdfr */ 250130407Sdfr enc->ul[0] = htonl(enc->ul[0]); 251130407Sdfr 252130549Smlaier IFQ_HANDOFF(ifp, m, error); 253130549Smlaier return (error); 254130407Sdfr } else { 255130407Sdfr /* 256130407Sdfr * Fragment the datagram, making sure to leave enough 257130407Sdfr * space for the encapsulation header in each packet. 258130407Sdfr */ 259130407Sdfr fsize = psize - 2*sizeof(uint32_t); 260130407Sdfr dgl = next_dgl++; 261130407Sdfr dsize = m->m_pkthdr.len; 262130407Sdfr foff = 0; 263130407Sdfr while (m) { 264130407Sdfr if (m->m_pkthdr.len > fsize) { 265130407Sdfr /* 266130407Sdfr * Split off the tail segment from the 267130407Sdfr * datagram, copying our tags over. 268130407Sdfr */ 269130407Sdfr mtail = m_split(m, fsize, M_DONTWAIT); 270130407Sdfr m_tag_copy_chain(mtail, m, M_NOWAIT); 271130407Sdfr } else { 272130407Sdfr mtail = 0; 273130407Sdfr } 274130407Sdfr 275130407Sdfr /* 276130407Sdfr * Add our encapsulation header to this 277130407Sdfr * fragment and hand it off to the link. 278130407Sdfr */ 279130407Sdfr M_PREPEND(m, 2*sizeof(uint32_t), M_DONTWAIT); 280130407Sdfr if (!m) { 281130407Sdfr error = ENOBUFS; 282130407Sdfr goto bad; 283130407Sdfr } 284130407Sdfr enc = mtod(m, union fw_encap *); 285130407Sdfr if (foff == 0) { 286130407Sdfr enc->firstfrag.lf = FW_ENCAP_FIRST; 287144114Sgallatin enc->firstfrag.reserved1 = 0; 288144114Sgallatin enc->firstfrag.reserved2 = 0; 289130407Sdfr enc->firstfrag.datagram_size = dsize - 1; 290130407Sdfr enc->firstfrag.ether_type = type; 291130407Sdfr enc->firstfrag.dgl = dgl; 292130407Sdfr } else { 293130407Sdfr if (mtail) 294130407Sdfr enc->nextfrag.lf = FW_ENCAP_NEXT; 295130407Sdfr else 296130407Sdfr enc->nextfrag.lf = FW_ENCAP_LAST; 297144114Sgallatin enc->nextfrag.reserved1 = 0; 298144114Sgallatin enc->nextfrag.reserved2 = 0; 299144114Sgallatin enc->nextfrag.reserved3 = 0; 300130407Sdfr enc->nextfrag.datagram_size = dsize - 1; 301130407Sdfr enc->nextfrag.fragment_offset = foff; 302130407Sdfr enc->nextfrag.dgl = dgl; 303130407Sdfr } 304130407Sdfr foff += m->m_pkthdr.len - 2*sizeof(uint32_t); 305130407Sdfr 306130407Sdfr /* 307130407Sdfr * Byte swap the encapsulation header manually. 308130407Sdfr */ 309130407Sdfr enc->ul[0] = htonl(enc->ul[0]); 310130407Sdfr enc->ul[1] = htonl(enc->ul[1]); 311130407Sdfr 312130549Smlaier IFQ_HANDOFF(ifp, m, error); 313130549Smlaier if (error) { 314130407Sdfr if (mtail) 315130407Sdfr m_freem(mtail); 316130407Sdfr return (ENOBUFS); 317130407Sdfr } 318130407Sdfr 319130407Sdfr m = mtail; 320130407Sdfr } 321130407Sdfr 322130407Sdfr return (0); 323130407Sdfr } 324130407Sdfr 325130407Sdfrbad: 326130407Sdfr if (m) 327130407Sdfr m_freem(m); 328130407Sdfr return (error); 329130407Sdfr} 330130407Sdfr 331130407Sdfrstatic struct mbuf * 332130407Sdfrfirewire_input_fragment(struct fw_com *fc, struct mbuf *m, int src) 333130407Sdfr{ 334130407Sdfr union fw_encap *enc; 335130407Sdfr struct fw_reass *r; 336130407Sdfr struct mbuf *mf, *mprev; 337130407Sdfr int dsize; 338130407Sdfr int fstart, fend, start, end, islast; 339130407Sdfr uint32_t id; 340130407Sdfr 341130407Sdfr /* 342130407Sdfr * Find an existing reassembly buffer or create a new one. 343130407Sdfr */ 344130407Sdfr enc = mtod(m, union fw_encap *); 345130407Sdfr id = enc->firstfrag.dgl | (src << 16); 346130407Sdfr STAILQ_FOREACH(r, &fc->fc_frags, fr_link) 347130407Sdfr if (r->fr_id == id) 348130407Sdfr break; 349130407Sdfr if (!r) { 350130407Sdfr r = malloc(sizeof(struct fw_reass), M_TEMP, M_NOWAIT); 351130407Sdfr if (!r) { 352130407Sdfr m_freem(m); 353130407Sdfr return 0; 354130407Sdfr } 355130407Sdfr r->fr_id = id; 356130407Sdfr r->fr_frags = 0; 357130407Sdfr STAILQ_INSERT_HEAD(&fc->fc_frags, r, fr_link); 358130407Sdfr } 359130407Sdfr 360130407Sdfr /* 361130407Sdfr * If this fragment overlaps any other fragment, we must discard 362130407Sdfr * the partial reassembly and start again. 363130407Sdfr */ 364130407Sdfr if (enc->firstfrag.lf == FW_ENCAP_FIRST) 365130407Sdfr fstart = 0; 366130407Sdfr else 367130407Sdfr fstart = enc->nextfrag.fragment_offset; 368130407Sdfr fend = fstart + m->m_pkthdr.len - 2*sizeof(uint32_t); 369130407Sdfr dsize = enc->nextfrag.datagram_size; 370130407Sdfr islast = (enc->nextfrag.lf == FW_ENCAP_LAST); 371130407Sdfr 372130407Sdfr for (mf = r->fr_frags; mf; mf = mf->m_nextpkt) { 373130407Sdfr enc = mtod(mf, union fw_encap *); 374130407Sdfr if (enc->nextfrag.datagram_size != dsize) { 375130407Sdfr /* 376130407Sdfr * This fragment must be from a different 377130407Sdfr * packet. 378130407Sdfr */ 379130407Sdfr goto bad; 380130407Sdfr } 381130407Sdfr if (enc->firstfrag.lf == FW_ENCAP_FIRST) 382130407Sdfr start = 0; 383130407Sdfr else 384130407Sdfr start = enc->nextfrag.fragment_offset; 385130407Sdfr end = start + mf->m_pkthdr.len - 2*sizeof(uint32_t); 386130407Sdfr if ((fstart < end && fend > start) || 387130407Sdfr (islast && enc->nextfrag.lf == FW_ENCAP_LAST)) { 388130407Sdfr /* 389130407Sdfr * Overlap - discard reassembly buffer and start 390130407Sdfr * again with this fragment. 391130407Sdfr */ 392130407Sdfr goto bad; 393130407Sdfr } 394130407Sdfr } 395130407Sdfr 396130407Sdfr /* 397130407Sdfr * Find where to put this fragment in the list. 398130407Sdfr */ 399130407Sdfr for (mf = r->fr_frags, mprev = NULL; mf; 400130407Sdfr mprev = mf, mf = mf->m_nextpkt) { 401130407Sdfr enc = mtod(mf, union fw_encap *); 402130407Sdfr if (enc->firstfrag.lf == FW_ENCAP_FIRST) 403130407Sdfr start = 0; 404130407Sdfr else 405130407Sdfr start = enc->nextfrag.fragment_offset; 406130407Sdfr if (start >= fend) 407130407Sdfr break; 408130407Sdfr } 409130407Sdfr 410130407Sdfr /* 411130407Sdfr * If this is a last fragment and we are not adding at the end 412130407Sdfr * of the list, discard the buffer. 413130407Sdfr */ 414130407Sdfr if (islast && mprev && mprev->m_nextpkt) 415130407Sdfr goto bad; 416130407Sdfr 417130407Sdfr if (mprev) { 418130407Sdfr m->m_nextpkt = mprev->m_nextpkt; 419130407Sdfr mprev->m_nextpkt = m; 420130407Sdfr 421130407Sdfr /* 422130407Sdfr * Coalesce forwards and see if we can make a whole 423130407Sdfr * datagram. 424130407Sdfr */ 425130407Sdfr enc = mtod(mprev, union fw_encap *); 426130407Sdfr if (enc->firstfrag.lf == FW_ENCAP_FIRST) 427130407Sdfr start = 0; 428130407Sdfr else 429130407Sdfr start = enc->nextfrag.fragment_offset; 430130407Sdfr end = start + mprev->m_pkthdr.len - 2*sizeof(uint32_t); 431130407Sdfr while (end == fstart) { 432130407Sdfr /* 433130407Sdfr * Strip off the encap header from m and 434130407Sdfr * append it to mprev, freeing m. 435130407Sdfr */ 436130407Sdfr m_adj(m, 2*sizeof(uint32_t)); 437130407Sdfr mprev->m_nextpkt = m->m_nextpkt; 438130407Sdfr mprev->m_pkthdr.len += m->m_pkthdr.len; 439130407Sdfr m_cat(mprev, m); 440130407Sdfr 441130407Sdfr if (mprev->m_pkthdr.len == dsize + 1 + 2*sizeof(uint32_t)) { 442130407Sdfr /* 443130407Sdfr * We have assembled a complete packet 444130407Sdfr * we must be finished. Make sure we have 445130407Sdfr * merged the whole chain. 446130407Sdfr */ 447130407Sdfr STAILQ_REMOVE(&fc->fc_frags, r, fw_reass, fr_link); 448130407Sdfr free(r, M_TEMP); 449130407Sdfr m = mprev->m_nextpkt; 450130407Sdfr while (m) { 451130407Sdfr mf = m->m_nextpkt; 452130407Sdfr m_freem(m); 453130407Sdfr m = mf; 454130407Sdfr } 455130407Sdfr mprev->m_nextpkt = NULL; 456130407Sdfr 457130407Sdfr return (mprev); 458130407Sdfr } 459130407Sdfr 460130407Sdfr /* 461130407Sdfr * See if we can continue merging forwards. 462130407Sdfr */ 463130407Sdfr end = fend; 464130407Sdfr m = mprev->m_nextpkt; 465130407Sdfr if (m) { 466130407Sdfr enc = mtod(m, union fw_encap *); 467130407Sdfr if (enc->firstfrag.lf == FW_ENCAP_FIRST) 468130407Sdfr fstart = 0; 469130407Sdfr else 470130407Sdfr fstart = enc->nextfrag.fragment_offset; 471130407Sdfr fend = fstart + m->m_pkthdr.len 472130407Sdfr - 2*sizeof(uint32_t); 473130407Sdfr } else { 474130407Sdfr break; 475130407Sdfr } 476130407Sdfr } 477130407Sdfr } else { 478130407Sdfr m->m_nextpkt = 0; 479130407Sdfr r->fr_frags = m; 480130407Sdfr } 481130407Sdfr 482130407Sdfr return (0); 483130407Sdfr 484130407Sdfrbad: 485130407Sdfr while (r->fr_frags) { 486130407Sdfr mf = r->fr_frags; 487130407Sdfr r->fr_frags = mf->m_nextpkt; 488130407Sdfr m_freem(mf); 489130407Sdfr } 490130407Sdfr m->m_nextpkt = 0; 491130407Sdfr r->fr_frags = m; 492130407Sdfr 493130407Sdfr return (0); 494130407Sdfr} 495130407Sdfr 496130407Sdfrvoid 497130407Sdfrfirewire_input(struct ifnet *ifp, struct mbuf *m, uint16_t src) 498130407Sdfr{ 499154209Sbrooks struct fw_com *fc = IFP2FWC(ifp); 500130407Sdfr union fw_encap *enc; 501130407Sdfr int type, isr; 502130407Sdfr 503130407Sdfr /* 504130407Sdfr * The caller has already stripped off the packet header 505130407Sdfr * (stream or wreqb) and marked the mbuf's M_BCAST flag 506130407Sdfr * appropriately. We de-encapsulate the IP packet and pass it 507130407Sdfr * up the line after handling link-level fragmentation. 508130407Sdfr */ 509130407Sdfr if (m->m_pkthdr.len < sizeof(uint32_t)) { 510130407Sdfr if_printf(ifp, "discarding frame without " 511130407Sdfr "encapsulation header (len %u pkt len %u)\n", 512130407Sdfr m->m_len, m->m_pkthdr.len); 513130407Sdfr } 514130407Sdfr 515130407Sdfr m = m_pullup(m, sizeof(uint32_t)); 516169735Srwatson if (m == NULL) 517169735Srwatson return; 518130407Sdfr enc = mtod(m, union fw_encap *); 519130407Sdfr 520130407Sdfr /* 521130407Sdfr * Byte swap the encapsulation header manually. 522130407Sdfr */ 523151265Simp enc->ul[0] = ntohl(enc->ul[0]); 524130407Sdfr 525130407Sdfr if (enc->unfrag.lf != 0) { 526130407Sdfr m = m_pullup(m, 2*sizeof(uint32_t)); 527130407Sdfr if (!m) 528130407Sdfr return; 529130407Sdfr enc = mtod(m, union fw_encap *); 530151265Simp enc->ul[1] = ntohl(enc->ul[1]); 531130407Sdfr m = firewire_input_fragment(fc, m, src); 532130407Sdfr if (!m) 533130407Sdfr return; 534130407Sdfr enc = mtod(m, union fw_encap *); 535130407Sdfr type = enc->firstfrag.ether_type; 536130407Sdfr m_adj(m, 2*sizeof(uint32_t)); 537130407Sdfr } else { 538130407Sdfr type = enc->unfrag.ether_type; 539130407Sdfr m_adj(m, sizeof(uint32_t)); 540130407Sdfr } 541130407Sdfr 542130407Sdfr if (m->m_pkthdr.rcvif == NULL) { 543130407Sdfr if_printf(ifp, "discard frame w/o interface pointer\n"); 544130407Sdfr ifp->if_ierrors++; 545130407Sdfr m_freem(m); 546130407Sdfr return; 547130407Sdfr } 548130407Sdfr#ifdef DIAGNOSTIC 549130407Sdfr if (m->m_pkthdr.rcvif != ifp) { 550130407Sdfr if_printf(ifp, "Warning, frame marked as received on %s\n", 551130407Sdfr m->m_pkthdr.rcvif->if_xname); 552130407Sdfr } 553130407Sdfr#endif 554130407Sdfr 555130407Sdfr#ifdef MAC 556130407Sdfr /* 557130407Sdfr * Tag the mbuf with an appropriate MAC label before any other 558130407Sdfr * consumers can get to it. 559130407Sdfr */ 560172930Srwatson mac_ifnet_create_mbuf(ifp, m); 561130407Sdfr#endif 562130407Sdfr 563130407Sdfr /* 564130407Sdfr * Give bpf a chance at the packet. The link-level driver 565130407Sdfr * should have left us a tag with the EUID of the sender. 566130407Sdfr */ 567159183Ssam if (bpf_peers_present(ifp->if_bpf)) { 568130407Sdfr struct fw_bpfhdr h; 569130407Sdfr struct m_tag *mtag; 570130407Sdfr 571130407Sdfr mtag = m_tag_locate(m, MTAG_FIREWIRE, MTAG_FIREWIRE_SENDER_EUID, 0); 572130407Sdfr if (mtag) 573130407Sdfr bcopy(mtag + 1, h.firewire_shost, 8); 574130407Sdfr else 575130407Sdfr bcopy(&firewire_broadcastaddr, h.firewire_dhost, 8); 576130407Sdfr bcopy(&fc->fc_hwaddr, h.firewire_dhost, 8); 577130407Sdfr h.firewire_type = htons(type); 578130407Sdfr bpf_mtap2(ifp->if_bpf, &h, sizeof(h), m); 579130407Sdfr } 580130407Sdfr 581130407Sdfr if (ifp->if_flags & IFF_MONITOR) { 582130407Sdfr /* 583130407Sdfr * Interface marked for monitoring; discard packet. 584130407Sdfr */ 585130407Sdfr m_freem(m); 586130407Sdfr return; 587130407Sdfr } 588130407Sdfr 589130407Sdfr ifp->if_ibytes += m->m_pkthdr.len; 590130407Sdfr 591130407Sdfr /* Discard packet if interface is not up */ 592130407Sdfr if ((ifp->if_flags & IFF_UP) == 0) { 593130407Sdfr m_freem(m); 594130407Sdfr return; 595130407Sdfr } 596130407Sdfr 597130407Sdfr if (m->m_flags & (M_BCAST|M_MCAST)) 598130407Sdfr ifp->if_imcasts++; 599130407Sdfr 600130407Sdfr switch (type) { 601130407Sdfr#ifdef INET 602130407Sdfr case ETHERTYPE_IP: 603154518Sandre if ((m = ip_fastforward(m)) == NULL) 604130407Sdfr return; 605130407Sdfr isr = NETISR_IP; 606130407Sdfr break; 607130407Sdfr 608130407Sdfr case ETHERTYPE_ARP: 609130407Sdfr { 610130407Sdfr struct arphdr *ah; 611130407Sdfr ah = mtod(m, struct arphdr *); 612130407Sdfr 613130407Sdfr /* 614130407Sdfr * Adjust the arp packet to insert an empty tha slot. 615130407Sdfr */ 616130407Sdfr m->m_len += ah->ar_hln; 617130407Sdfr m->m_pkthdr.len += ah->ar_hln; 618130407Sdfr bcopy(ar_tha(ah), ar_tpa(ah), ah->ar_pln); 619130407Sdfr isr = NETISR_ARP; 620130407Sdfr break; 621130407Sdfr } 622130407Sdfr#endif 623130407Sdfr 624130407Sdfr#ifdef INET6 625130407Sdfr case ETHERTYPE_IPV6: 626130407Sdfr isr = NETISR_IPV6; 627130407Sdfr break; 628130407Sdfr#endif 629130407Sdfr 630130407Sdfr default: 631130407Sdfr m_freem(m); 632130407Sdfr return; 633130407Sdfr } 634130407Sdfr 635130407Sdfr netisr_dispatch(isr, m); 636130407Sdfr} 637130407Sdfr 638130407Sdfrint 639130407Sdfrfirewire_ioctl(struct ifnet *ifp, int command, caddr_t data) 640130407Sdfr{ 641130407Sdfr struct ifaddr *ifa = (struct ifaddr *) data; 642130407Sdfr struct ifreq *ifr = (struct ifreq *) data; 643130407Sdfr int error = 0; 644130407Sdfr 645130407Sdfr switch (command) { 646130407Sdfr case SIOCSIFADDR: 647130407Sdfr ifp->if_flags |= IFF_UP; 648130407Sdfr 649130407Sdfr switch (ifa->ifa_addr->sa_family) { 650130407Sdfr#ifdef INET 651130407Sdfr case AF_INET: 652130407Sdfr ifp->if_init(ifp->if_softc); /* before arpwhohas */ 653130407Sdfr arp_ifinit(ifp, ifa); 654130407Sdfr break; 655130407Sdfr#endif 656130407Sdfr default: 657130407Sdfr ifp->if_init(ifp->if_softc); 658130407Sdfr break; 659130407Sdfr } 660130407Sdfr break; 661130407Sdfr 662130407Sdfr case SIOCGIFADDR: 663130407Sdfr { 664130407Sdfr struct sockaddr *sa; 665130407Sdfr 666130407Sdfr sa = (struct sockaddr *) & ifr->ifr_data; 667154209Sbrooks bcopy(&IFP2FWC(ifp)->fc_hwaddr, 668130407Sdfr (caddr_t) sa->sa_data, sizeof(struct fw_hwaddr)); 669130407Sdfr } 670130407Sdfr break; 671130407Sdfr 672130407Sdfr case SIOCSIFMTU: 673130407Sdfr /* 674130407Sdfr * Set the interface MTU. 675130407Sdfr */ 676130407Sdfr if (ifr->ifr_mtu > 1500) { 677130407Sdfr error = EINVAL; 678130407Sdfr } else { 679130407Sdfr ifp->if_mtu = ifr->ifr_mtu; 680130407Sdfr } 681130407Sdfr break; 682130407Sdfr default: 683130407Sdfr error = EINVAL; /* XXX netbsd has ENOTTY??? */ 684130407Sdfr break; 685130407Sdfr } 686130407Sdfr return (error); 687130407Sdfr} 688130407Sdfr 689130407Sdfrstatic int 690130407Sdfrfirewire_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 691130407Sdfr struct sockaddr *sa) 692130407Sdfr{ 693130407Sdfr#ifdef INET 694130407Sdfr struct sockaddr_in *sin; 695130407Sdfr#endif 696130407Sdfr#ifdef INET6 697130407Sdfr struct sockaddr_in6 *sin6; 698130407Sdfr#endif 699130407Sdfr 700130407Sdfr switch(sa->sa_family) { 701130407Sdfr case AF_LINK: 702130407Sdfr /* 703130407Sdfr * No mapping needed. 704130407Sdfr */ 705130407Sdfr *llsa = 0; 706130407Sdfr return 0; 707130407Sdfr 708130407Sdfr#ifdef INET 709130407Sdfr case AF_INET: 710130407Sdfr sin = (struct sockaddr_in *)sa; 711130407Sdfr if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 712130407Sdfr return EADDRNOTAVAIL; 713130407Sdfr *llsa = 0; 714130407Sdfr return 0; 715130407Sdfr#endif 716130407Sdfr#ifdef INET6 717130407Sdfr case AF_INET6: 718130407Sdfr sin6 = (struct sockaddr_in6 *)sa; 719130407Sdfr if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 720130407Sdfr /* 721130407Sdfr * An IP6 address of 0 means listen to all 722130407Sdfr * of the Ethernet multicast address used for IP6. 723130407Sdfr * (This is used for multicast routers.) 724130407Sdfr */ 725130407Sdfr ifp->if_flags |= IFF_ALLMULTI; 726130407Sdfr *llsa = 0; 727130407Sdfr return 0; 728130407Sdfr } 729130407Sdfr if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 730130407Sdfr return EADDRNOTAVAIL; 731130407Sdfr *llsa = 0; 732130407Sdfr return 0; 733130407Sdfr#endif 734130407Sdfr 735130407Sdfr default: 736130407Sdfr /* 737130407Sdfr * Well, the text isn't quite right, but it's the name 738130407Sdfr * that counts... 739130407Sdfr */ 740130407Sdfr return EAFNOSUPPORT; 741130407Sdfr } 742130407Sdfr} 743130407Sdfr 744130407Sdfrvoid 745130407Sdfrfirewire_ifattach(struct ifnet *ifp, struct fw_hwaddr *llc) 746130407Sdfr{ 747154209Sbrooks struct fw_com *fc = IFP2FWC(ifp); 748130407Sdfr struct ifaddr *ifa; 749130407Sdfr struct sockaddr_dl *sdl; 750130407Sdfr static const char* speeds[] = { 751130407Sdfr "S100", "S200", "S400", "S800", 752130407Sdfr "S1600", "S3200" 753130407Sdfr }; 754130407Sdfr 755130407Sdfr fc->fc_speed = llc->sspd; 756130407Sdfr STAILQ_INIT(&fc->fc_frags); 757130407Sdfr 758130407Sdfr ifp->if_addrlen = sizeof(struct fw_hwaddr); 759130407Sdfr ifp->if_hdrlen = 0; 760130407Sdfr if_attach(ifp); 761130407Sdfr ifp->if_mtu = 1500; /* XXX */ 762130407Sdfr ifp->if_output = firewire_output; 763130407Sdfr ifp->if_resolvemulti = firewire_resolvemulti; 764130407Sdfr ifp->if_broadcastaddr = (u_char *) &firewire_broadcastaddr; 765130407Sdfr 766152315Sru ifa = ifp->if_addr; 767130407Sdfr KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 768130407Sdfr sdl = (struct sockaddr_dl *)ifa->ifa_addr; 769130407Sdfr sdl->sdl_type = IFT_IEEE1394; 770130407Sdfr sdl->sdl_alen = ifp->if_addrlen; 771130407Sdfr bcopy(llc, LLADDR(sdl), ifp->if_addrlen); 772130407Sdfr 773130407Sdfr bpfattach(ifp, DLT_APPLE_IP_OVER_IEEE1394, 774130407Sdfr sizeof(struct fw_hwaddr)); 775130407Sdfr 776130407Sdfr if_printf(ifp, "Firewire address: %8D @ 0x%04x%08x, %s, maxrec %d\n", 777130407Sdfr (uint8_t *) &llc->sender_unique_ID_hi, ":", 778130407Sdfr ntohs(llc->sender_unicast_FIFO_hi), 779130407Sdfr ntohl(llc->sender_unicast_FIFO_lo), 780130407Sdfr speeds[llc->sspd], 781130407Sdfr (2 << llc->sender_max_rec)); 782130407Sdfr} 783130407Sdfr 784130407Sdfrvoid 785130407Sdfrfirewire_ifdetach(struct ifnet *ifp) 786130407Sdfr{ 787130407Sdfr bpfdetach(ifp); 788130407Sdfr if_detach(ifp); 789130407Sdfr} 790130407Sdfr 791130407Sdfrvoid 792130407Sdfrfirewire_busreset(struct ifnet *ifp) 793130407Sdfr{ 794154209Sbrooks struct fw_com *fc = IFP2FWC(ifp); 795130407Sdfr struct fw_reass *r; 796130407Sdfr struct mbuf *m; 797130407Sdfr 798130407Sdfr /* 799130407Sdfr * Discard any partial datagrams since the host ids may have changed. 800130407Sdfr */ 801130407Sdfr while ((r = STAILQ_FIRST(&fc->fc_frags))) { 802130407Sdfr STAILQ_REMOVE_HEAD(&fc->fc_frags, fr_link); 803130407Sdfr while (r->fr_frags) { 804130407Sdfr m = r->fr_frags; 805130407Sdfr r->fr_frags = m->m_nextpkt; 806130407Sdfr m_freem(m); 807130407Sdfr } 808130407Sdfr free(r, M_TEMP); 809130407Sdfr } 810130407Sdfr} 811147256Sbrooks 812147256Sbrooksstatic void * 813147256Sbrooksfirewire_alloc(u_char type, struct ifnet *ifp) 814147256Sbrooks{ 815147256Sbrooks struct fw_com *fc; 816147256Sbrooks 817147256Sbrooks fc = malloc(sizeof(struct fw_com), M_FWCOM, M_WAITOK | M_ZERO); 818147256Sbrooks fc->fc_ifp = ifp; 819147256Sbrooks 820147256Sbrooks return (fc); 821147256Sbrooks} 822147256Sbrooks 823147256Sbrooksstatic void 824147256Sbrooksfirewire_free(void *com, u_char type) 825147256Sbrooks{ 826147256Sbrooks 827147256Sbrooks free(com, M_FWCOM); 828147256Sbrooks} 829147256Sbrooks 830147256Sbrooksstatic int 831147256Sbrooksfirewire_modevent(module_t mod, int type, void *data) 832147256Sbrooks{ 833147256Sbrooks 834147256Sbrooks switch (type) { 835147256Sbrooks case MOD_LOAD: 836147256Sbrooks if_register_com_alloc(IFT_IEEE1394, 837147256Sbrooks firewire_alloc, firewire_free); 838147256Sbrooks break; 839147256Sbrooks case MOD_UNLOAD: 840147256Sbrooks if_deregister_com_alloc(IFT_IEEE1394); 841147256Sbrooks break; 842147256Sbrooks default: 843147256Sbrooks return (EOPNOTSUPP); 844147256Sbrooks } 845147256Sbrooks 846147256Sbrooks return (0); 847147256Sbrooks} 848147256Sbrooks 849147256Sbrooksstatic moduledata_t firewire_mod = { 850150988Savatar "if_firewire", 851147256Sbrooks firewire_modevent, 852147256Sbrooks 0 853147256Sbrooks}; 854147256Sbrooks 855150988SavatarDECLARE_MODULE(if_firewire, firewire_mod, SI_SUB_INIT_IF, SI_ORDER_ANY); 856150988SavatarMODULE_VERSION(if_firewire, 1); 857