if_fwsubr.c revision 148887
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 148887 2005-08-09 10:20:02Z 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> 40131177Spjd#include <sys/mac.h> 41130407Sdfr#include <sys/malloc.h> 42130407Sdfr#include <sys/mbuf.h> 43147256Sbrooks#include <sys/module.h> 44130407Sdfr#include <sys/socket.h> 45130407Sdfr#include <sys/sockio.h> 46130407Sdfr 47130407Sdfr#include <net/if.h> 48130407Sdfr#include <net/netisr.h> 49130407Sdfr#include <net/route.h> 50130407Sdfr#include <net/if_llc.h> 51130407Sdfr#include <net/if_dl.h> 52130407Sdfr#include <net/if_types.h> 53130407Sdfr#include <net/bpf.h> 54130407Sdfr#include <net/firewire.h> 55130407Sdfr 56130407Sdfr#if defined(INET) || defined(INET6) 57130407Sdfr#include <netinet/in.h> 58130407Sdfr#include <netinet/in_var.h> 59130407Sdfr#include <netinet/if_ether.h> 60130407Sdfr#endif 61130407Sdfr#ifdef INET6 62130407Sdfr#include <netinet6/nd6.h> 63130407Sdfr#endif 64130407Sdfr 65130407Sdfr#define IFP2FC(IFP) ((struct fw_com *)IFP) 66130407Sdfr 67147256SbrooksMALLOC_DEFINE(M_FWCOM, "fw_com", "firewire interface internals"); 68147256Sbrooks 69130407Sdfrstruct fw_hwaddr firewire_broadcastaddr = { 70130407Sdfr 0xffffffff, 71130407Sdfr 0xffffffff, 72130407Sdfr 0xff, 73130407Sdfr 0xff, 74130407Sdfr 0xffff, 75130407Sdfr 0xffffffff 76130407Sdfr}; 77130407Sdfr 78130407Sdfrstatic int 79130407Sdfrfirewire_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, 80130407Sdfr struct rtentry *rt0) 81130407Sdfr{ 82147256Sbrooks struct fw_com *fc = IFP2FC(ifp); 83130407Sdfr int error, type; 84130407Sdfr struct rtentry *rt; 85130407Sdfr struct m_tag *mtag; 86130407Sdfr union fw_encap *enc; 87130407Sdfr struct fw_hwaddr *destfw; 88130407Sdfr uint8_t speed; 89130407Sdfr uint16_t psize, fsize, dsize; 90130407Sdfr struct mbuf *mtail; 91130407Sdfr int unicast, dgl, foff; 92130407Sdfr static int next_dgl; 93130407Sdfr 94130429Sdfr#ifdef MAC 95130429Sdfr error = mac_check_ifnet_transmit(ifp, m); 96130429Sdfr if (error) 97130429Sdfr goto bad; 98130429Sdfr#endif 99130429Sdfr 100148887Srwatson if (!((ifp->if_flags & IFF_UP) && 101148887Srwatson (ifp->if_drv_flags & IFF_DRV_RUNNING))) { 102130407Sdfr error = ENETDOWN; 103130407Sdfr goto bad; 104130407Sdfr } 105130407Sdfr 106130407Sdfr error = rt_check(&rt, &rt0, dst); 107130407Sdfr if (error) 108130407Sdfr goto bad; 109148883Sglebius RT_UNLOCK(rt); 110130407Sdfr 111130407Sdfr /* 112130407Sdfr * For unicast, we make a tag to store the lladdr of the 113130407Sdfr * destination. This might not be the first time we have seen 114130407Sdfr * the packet (for instance, the arp code might be trying to 115130407Sdfr * re-send it after receiving an arp reply) so we only 116130407Sdfr * allocate a tag if there isn't one there already. For 117130407Sdfr * multicast, we will eventually use a different tag to store 118130407Sdfr * the channel number. 119130407Sdfr */ 120130407Sdfr unicast = !(m->m_flags & (M_BCAST | M_MCAST)); 121130407Sdfr if (unicast) { 122130407Sdfr mtag = m_tag_locate(m, MTAG_FIREWIRE, MTAG_FIREWIRE_HWADDR, NULL); 123130407Sdfr if (!mtag) { 124130407Sdfr mtag = m_tag_alloc(MTAG_FIREWIRE, MTAG_FIREWIRE_HWADDR, 125130407Sdfr sizeof (struct fw_hwaddr), M_NOWAIT); 126130407Sdfr if (!mtag) { 127130407Sdfr error = ENOMEM; 128130407Sdfr goto bad; 129130407Sdfr } 130130407Sdfr m_tag_prepend(m, mtag); 131130407Sdfr } 132130407Sdfr destfw = (struct fw_hwaddr *)(mtag + 1); 133130407Sdfr } else { 134130407Sdfr destfw = 0; 135130407Sdfr } 136130407Sdfr 137130407Sdfr switch (dst->sa_family) { 138130407Sdfr#ifdef AF_INET 139130407Sdfr case AF_INET: 140130407Sdfr /* 141130407Sdfr * Only bother with arp for unicast. Allocation of 142130407Sdfr * channels etc. for firewire is quite different and 143130407Sdfr * doesn't fit into the arp model. 144130407Sdfr */ 145130407Sdfr if (unicast) { 146130407Sdfr error = arpresolve(ifp, rt, m, dst, (u_char *) destfw); 147130407Sdfr if (error) 148130407Sdfr return (error == EWOULDBLOCK ? 0 : error); 149130407Sdfr } 150130407Sdfr type = ETHERTYPE_IP; 151130407Sdfr break; 152130407Sdfr 153130407Sdfr case AF_ARP: 154130407Sdfr { 155130407Sdfr struct arphdr *ah; 156130407Sdfr ah = mtod(m, struct arphdr *); 157130407Sdfr ah->ar_hrd = htons(ARPHRD_IEEE1394); 158130407Sdfr type = ETHERTYPE_ARP; 159130407Sdfr if (unicast) 160130407Sdfr *destfw = *(struct fw_hwaddr *) ar_tha(ah); 161130407Sdfr 162130407Sdfr /* 163130407Sdfr * The standard arp code leaves a hole for the target 164130407Sdfr * hardware address which we need to close up. 165130407Sdfr */ 166130407Sdfr bcopy(ar_tpa(ah), ar_tha(ah), ah->ar_pln); 167130407Sdfr m_adj(m, -ah->ar_hln); 168130407Sdfr break; 169130407Sdfr } 170130407Sdfr#endif 171130407Sdfr 172130407Sdfr#ifdef INET6 173130407Sdfr case AF_INET6: 174130407Sdfr if (unicast) { 175147256Sbrooks error = nd6_storelladdr(fc->fc_ifp, rt, m, dst, 176130407Sdfr (u_char *) destfw); 177130407Sdfr if (error) 178130407Sdfr return (error); 179130407Sdfr } 180130407Sdfr type = ETHERTYPE_IPV6; 181130407Sdfr break; 182130407Sdfr#endif 183130407Sdfr 184130407Sdfr default: 185130407Sdfr if_printf(ifp, "can't handle af%d\n", dst->sa_family); 186130407Sdfr error = EAFNOSUPPORT; 187130407Sdfr goto bad; 188130407Sdfr } 189130407Sdfr 190130407Sdfr /* 191130407Sdfr * Let BPF tap off a copy before we encapsulate. 192130407Sdfr */ 193130407Sdfr if (ifp->if_bpf) { 194130407Sdfr struct fw_bpfhdr h; 195130407Sdfr if (unicast) 196130407Sdfr bcopy(destfw, h.firewire_dhost, 8); 197130407Sdfr else 198130407Sdfr bcopy(&firewire_broadcastaddr, h.firewire_dhost, 8); 199130407Sdfr bcopy(&fc->fc_hwaddr, h.firewire_shost, 8); 200130407Sdfr h.firewire_type = htons(type); 201130407Sdfr bpf_mtap2(ifp->if_bpf, &h, sizeof(h), m); 202130407Sdfr } 203130407Sdfr 204130407Sdfr /* 205130407Sdfr * Punt on MCAP for now and send all multicast packets on the 206130407Sdfr * broadcast channel. 207130407Sdfr */ 208130407Sdfr if (m->m_flags & M_MCAST) 209130407Sdfr m->m_flags |= M_BCAST; 210130407Sdfr 211130407Sdfr /* 212130407Sdfr * Figure out what speed to use and what the largest supported 213130407Sdfr * packet size is. For unicast, this is the minimum of what we 214130407Sdfr * can speak and what they can hear. For broadcast, lets be 215130407Sdfr * conservative and use S100. We could possibly improve that 216130407Sdfr * by examining the bus manager's speed map or similar. We 217130407Sdfr * also reduce the packet size for broadcast to account for 218130407Sdfr * the GASP header. 219130407Sdfr */ 220130407Sdfr if (unicast) { 221130407Sdfr speed = min(fc->fc_speed, destfw->sspd); 222130407Sdfr psize = min(512 << speed, 2 << destfw->sender_max_rec); 223130407Sdfr } else { 224130407Sdfr speed = 0; 225130407Sdfr psize = 512 - 2*sizeof(uint32_t); 226130407Sdfr } 227130407Sdfr 228130407Sdfr /* 229130407Sdfr * Next, we encapsulate, possibly fragmenting the original 230130407Sdfr * datagram if it won't fit into a single packet. 231130407Sdfr */ 232130407Sdfr if (m->m_pkthdr.len <= psize - sizeof(uint32_t)) { 233130407Sdfr /* 234130407Sdfr * No fragmentation is necessary. 235130407Sdfr */ 236130407Sdfr M_PREPEND(m, sizeof(uint32_t), M_DONTWAIT); 237130407Sdfr if (!m) { 238130407Sdfr error = ENOBUFS; 239130407Sdfr goto bad; 240130407Sdfr } 241130407Sdfr enc = mtod(m, union fw_encap *); 242130407Sdfr enc->unfrag.ether_type = type; 243130407Sdfr enc->unfrag.lf = FW_ENCAP_UNFRAG; 244144114Sgallatin enc->unfrag.reserved = 0; 245130407Sdfr 246130407Sdfr /* 247130407Sdfr * Byte swap the encapsulation header manually. 248130407Sdfr */ 249130407Sdfr enc->ul[0] = htonl(enc->ul[0]); 250130407Sdfr 251130549Smlaier IFQ_HANDOFF(ifp, m, error); 252130549Smlaier return (error); 253130407Sdfr } else { 254130407Sdfr /* 255130407Sdfr * Fragment the datagram, making sure to leave enough 256130407Sdfr * space for the encapsulation header in each packet. 257130407Sdfr */ 258130407Sdfr fsize = psize - 2*sizeof(uint32_t); 259130407Sdfr dgl = next_dgl++; 260130407Sdfr dsize = m->m_pkthdr.len; 261130407Sdfr foff = 0; 262130407Sdfr while (m) { 263130407Sdfr if (m->m_pkthdr.len > fsize) { 264130407Sdfr /* 265130407Sdfr * Split off the tail segment from the 266130407Sdfr * datagram, copying our tags over. 267130407Sdfr */ 268130407Sdfr mtail = m_split(m, fsize, M_DONTWAIT); 269130407Sdfr m_tag_copy_chain(mtail, m, M_NOWAIT); 270130407Sdfr } else { 271130407Sdfr mtail = 0; 272130407Sdfr } 273130407Sdfr 274130407Sdfr /* 275130407Sdfr * Add our encapsulation header to this 276130407Sdfr * fragment and hand it off to the link. 277130407Sdfr */ 278130407Sdfr M_PREPEND(m, 2*sizeof(uint32_t), M_DONTWAIT); 279130407Sdfr if (!m) { 280130407Sdfr error = ENOBUFS; 281130407Sdfr goto bad; 282130407Sdfr } 283130407Sdfr enc = mtod(m, union fw_encap *); 284130407Sdfr if (foff == 0) { 285130407Sdfr enc->firstfrag.lf = FW_ENCAP_FIRST; 286144114Sgallatin enc->firstfrag.reserved1 = 0; 287144114Sgallatin enc->firstfrag.reserved2 = 0; 288130407Sdfr enc->firstfrag.datagram_size = dsize - 1; 289130407Sdfr enc->firstfrag.ether_type = type; 290130407Sdfr enc->firstfrag.dgl = dgl; 291130407Sdfr } else { 292130407Sdfr if (mtail) 293130407Sdfr enc->nextfrag.lf = FW_ENCAP_NEXT; 294130407Sdfr else 295130407Sdfr enc->nextfrag.lf = FW_ENCAP_LAST; 296144114Sgallatin enc->nextfrag.reserved1 = 0; 297144114Sgallatin enc->nextfrag.reserved2 = 0; 298144114Sgallatin enc->nextfrag.reserved3 = 0; 299130407Sdfr enc->nextfrag.datagram_size = dsize - 1; 300130407Sdfr enc->nextfrag.fragment_offset = foff; 301130407Sdfr enc->nextfrag.dgl = dgl; 302130407Sdfr } 303130407Sdfr foff += m->m_pkthdr.len - 2*sizeof(uint32_t); 304130407Sdfr 305130407Sdfr /* 306130407Sdfr * Byte swap the encapsulation header manually. 307130407Sdfr */ 308130407Sdfr enc->ul[0] = htonl(enc->ul[0]); 309130407Sdfr enc->ul[1] = htonl(enc->ul[1]); 310130407Sdfr 311130549Smlaier IFQ_HANDOFF(ifp, m, error); 312130549Smlaier if (error) { 313130407Sdfr if (mtail) 314130407Sdfr m_freem(mtail); 315130407Sdfr return (ENOBUFS); 316130407Sdfr } 317130407Sdfr 318130407Sdfr m = mtail; 319130407Sdfr } 320130407Sdfr 321130407Sdfr return (0); 322130407Sdfr } 323130407Sdfr 324130407Sdfrbad: 325130407Sdfr if (m) 326130407Sdfr m_freem(m); 327130407Sdfr return (error); 328130407Sdfr} 329130407Sdfr 330130407Sdfrstatic struct mbuf * 331130407Sdfrfirewire_input_fragment(struct fw_com *fc, struct mbuf *m, int src) 332130407Sdfr{ 333130407Sdfr union fw_encap *enc; 334130407Sdfr struct fw_reass *r; 335130407Sdfr struct mbuf *mf, *mprev; 336130407Sdfr int dsize; 337130407Sdfr int fstart, fend, start, end, islast; 338130407Sdfr uint32_t id; 339130407Sdfr 340134246Srwatson GIANT_REQUIRED; 341134246Srwatson 342130407Sdfr /* 343130407Sdfr * Find an existing reassembly buffer or create a new one. 344130407Sdfr */ 345130407Sdfr enc = mtod(m, union fw_encap *); 346130407Sdfr id = enc->firstfrag.dgl | (src << 16); 347130407Sdfr STAILQ_FOREACH(r, &fc->fc_frags, fr_link) 348130407Sdfr if (r->fr_id == id) 349130407Sdfr break; 350130407Sdfr if (!r) { 351130407Sdfr r = malloc(sizeof(struct fw_reass), M_TEMP, M_NOWAIT); 352130407Sdfr if (!r) { 353130407Sdfr m_freem(m); 354130407Sdfr return 0; 355130407Sdfr } 356130407Sdfr r->fr_id = id; 357130407Sdfr r->fr_frags = 0; 358130407Sdfr STAILQ_INSERT_HEAD(&fc->fc_frags, r, fr_link); 359130407Sdfr } 360130407Sdfr 361130407Sdfr /* 362130407Sdfr * If this fragment overlaps any other fragment, we must discard 363130407Sdfr * the partial reassembly and start again. 364130407Sdfr */ 365130407Sdfr if (enc->firstfrag.lf == FW_ENCAP_FIRST) 366130407Sdfr fstart = 0; 367130407Sdfr else 368130407Sdfr fstart = enc->nextfrag.fragment_offset; 369130407Sdfr fend = fstart + m->m_pkthdr.len - 2*sizeof(uint32_t); 370130407Sdfr dsize = enc->nextfrag.datagram_size; 371130407Sdfr islast = (enc->nextfrag.lf == FW_ENCAP_LAST); 372130407Sdfr 373130407Sdfr for (mf = r->fr_frags; mf; mf = mf->m_nextpkt) { 374130407Sdfr enc = mtod(mf, union fw_encap *); 375130407Sdfr if (enc->nextfrag.datagram_size != dsize) { 376130407Sdfr /* 377130407Sdfr * This fragment must be from a different 378130407Sdfr * packet. 379130407Sdfr */ 380130407Sdfr goto bad; 381130407Sdfr } 382130407Sdfr if (enc->firstfrag.lf == FW_ENCAP_FIRST) 383130407Sdfr start = 0; 384130407Sdfr else 385130407Sdfr start = enc->nextfrag.fragment_offset; 386130407Sdfr end = start + mf->m_pkthdr.len - 2*sizeof(uint32_t); 387130407Sdfr if ((fstart < end && fend > start) || 388130407Sdfr (islast && enc->nextfrag.lf == FW_ENCAP_LAST)) { 389130407Sdfr /* 390130407Sdfr * Overlap - discard reassembly buffer and start 391130407Sdfr * again with this fragment. 392130407Sdfr */ 393130407Sdfr goto bad; 394130407Sdfr } 395130407Sdfr } 396130407Sdfr 397130407Sdfr /* 398130407Sdfr * Find where to put this fragment in the list. 399130407Sdfr */ 400130407Sdfr for (mf = r->fr_frags, mprev = NULL; mf; 401130407Sdfr mprev = mf, mf = mf->m_nextpkt) { 402130407Sdfr enc = mtod(mf, union fw_encap *); 403130407Sdfr if (enc->firstfrag.lf == FW_ENCAP_FIRST) 404130407Sdfr start = 0; 405130407Sdfr else 406130407Sdfr start = enc->nextfrag.fragment_offset; 407130407Sdfr if (start >= fend) 408130407Sdfr break; 409130407Sdfr } 410130407Sdfr 411130407Sdfr /* 412130407Sdfr * If this is a last fragment and we are not adding at the end 413130407Sdfr * of the list, discard the buffer. 414130407Sdfr */ 415130407Sdfr if (islast && mprev && mprev->m_nextpkt) 416130407Sdfr goto bad; 417130407Sdfr 418130407Sdfr if (mprev) { 419130407Sdfr m->m_nextpkt = mprev->m_nextpkt; 420130407Sdfr mprev->m_nextpkt = m; 421130407Sdfr 422130407Sdfr /* 423130407Sdfr * Coalesce forwards and see if we can make a whole 424130407Sdfr * datagram. 425130407Sdfr */ 426130407Sdfr enc = mtod(mprev, union fw_encap *); 427130407Sdfr if (enc->firstfrag.lf == FW_ENCAP_FIRST) 428130407Sdfr start = 0; 429130407Sdfr else 430130407Sdfr start = enc->nextfrag.fragment_offset; 431130407Sdfr end = start + mprev->m_pkthdr.len - 2*sizeof(uint32_t); 432130407Sdfr while (end == fstart) { 433130407Sdfr /* 434130407Sdfr * Strip off the encap header from m and 435130407Sdfr * append it to mprev, freeing m. 436130407Sdfr */ 437130407Sdfr m_adj(m, 2*sizeof(uint32_t)); 438130407Sdfr mprev->m_nextpkt = m->m_nextpkt; 439130407Sdfr mprev->m_pkthdr.len += m->m_pkthdr.len; 440130407Sdfr m_cat(mprev, m); 441130407Sdfr 442130407Sdfr if (mprev->m_pkthdr.len == dsize + 1 + 2*sizeof(uint32_t)) { 443130407Sdfr /* 444130407Sdfr * We have assembled a complete packet 445130407Sdfr * we must be finished. Make sure we have 446130407Sdfr * merged the whole chain. 447130407Sdfr */ 448130407Sdfr STAILQ_REMOVE(&fc->fc_frags, r, fw_reass, fr_link); 449130407Sdfr free(r, M_TEMP); 450130407Sdfr m = mprev->m_nextpkt; 451130407Sdfr while (m) { 452130407Sdfr mf = m->m_nextpkt; 453130407Sdfr m_freem(m); 454130407Sdfr m = mf; 455130407Sdfr } 456130407Sdfr mprev->m_nextpkt = NULL; 457130407Sdfr 458130407Sdfr return (mprev); 459130407Sdfr } 460130407Sdfr 461130407Sdfr /* 462130407Sdfr * See if we can continue merging forwards. 463130407Sdfr */ 464130407Sdfr end = fend; 465130407Sdfr m = mprev->m_nextpkt; 466130407Sdfr if (m) { 467130407Sdfr enc = mtod(m, union fw_encap *); 468130407Sdfr if (enc->firstfrag.lf == FW_ENCAP_FIRST) 469130407Sdfr fstart = 0; 470130407Sdfr else 471130407Sdfr fstart = enc->nextfrag.fragment_offset; 472130407Sdfr fend = fstart + m->m_pkthdr.len 473130407Sdfr - 2*sizeof(uint32_t); 474130407Sdfr } else { 475130407Sdfr break; 476130407Sdfr } 477130407Sdfr } 478130407Sdfr } else { 479130407Sdfr m->m_nextpkt = 0; 480130407Sdfr r->fr_frags = m; 481130407Sdfr } 482130407Sdfr 483130407Sdfr return (0); 484130407Sdfr 485130407Sdfrbad: 486130407Sdfr while (r->fr_frags) { 487130407Sdfr mf = r->fr_frags; 488130407Sdfr r->fr_frags = mf->m_nextpkt; 489130407Sdfr m_freem(mf); 490130407Sdfr } 491130407Sdfr m->m_nextpkt = 0; 492130407Sdfr r->fr_frags = m; 493130407Sdfr 494130407Sdfr return (0); 495130407Sdfr} 496130407Sdfr 497130407Sdfrvoid 498130407Sdfrfirewire_input(struct ifnet *ifp, struct mbuf *m, uint16_t src) 499130407Sdfr{ 500147256Sbrooks struct fw_com *fc = IFP2FC(ifp); 501130407Sdfr union fw_encap *enc; 502130407Sdfr int type, isr; 503130407Sdfr 504130407Sdfr GIANT_REQUIRED; 505130407Sdfr 506130407Sdfr /* 507130407Sdfr * The caller has already stripped off the packet header 508130407Sdfr * (stream or wreqb) and marked the mbuf's M_BCAST flag 509130407Sdfr * appropriately. We de-encapsulate the IP packet and pass it 510130407Sdfr * up the line after handling link-level fragmentation. 511130407Sdfr */ 512130407Sdfr if (m->m_pkthdr.len < sizeof(uint32_t)) { 513130407Sdfr if_printf(ifp, "discarding frame without " 514130407Sdfr "encapsulation header (len %u pkt len %u)\n", 515130407Sdfr m->m_len, m->m_pkthdr.len); 516130407Sdfr } 517130407Sdfr 518130407Sdfr m = m_pullup(m, sizeof(uint32_t)); 519130407Sdfr enc = mtod(m, union fw_encap *); 520130407Sdfr 521130407Sdfr /* 522130407Sdfr * Byte swap the encapsulation header manually. 523130407Sdfr */ 524130407Sdfr enc->ul[0] = htonl(enc->ul[0]); 525130407Sdfr 526130407Sdfr if (enc->unfrag.lf != 0) { 527130407Sdfr m = m_pullup(m, 2*sizeof(uint32_t)); 528130407Sdfr if (!m) 529130407Sdfr return; 530130407Sdfr enc = mtod(m, union fw_encap *); 531130407Sdfr enc->ul[1] = htonl(enc->ul[1]); 532130407Sdfr m = firewire_input_fragment(fc, m, src); 533130407Sdfr if (!m) 534130407Sdfr return; 535130407Sdfr enc = mtod(m, union fw_encap *); 536130407Sdfr type = enc->firstfrag.ether_type; 537130407Sdfr m_adj(m, 2*sizeof(uint32_t)); 538130407Sdfr } else { 539130407Sdfr type = enc->unfrag.ether_type; 540130407Sdfr m_adj(m, sizeof(uint32_t)); 541130407Sdfr } 542130407Sdfr 543130407Sdfr if (m->m_pkthdr.rcvif == NULL) { 544130407Sdfr if_printf(ifp, "discard frame w/o interface pointer\n"); 545130407Sdfr ifp->if_ierrors++; 546130407Sdfr m_freem(m); 547130407Sdfr return; 548130407Sdfr } 549130407Sdfr#ifdef DIAGNOSTIC 550130407Sdfr if (m->m_pkthdr.rcvif != ifp) { 551130407Sdfr if_printf(ifp, "Warning, frame marked as received on %s\n", 552130407Sdfr m->m_pkthdr.rcvif->if_xname); 553130407Sdfr } 554130407Sdfr#endif 555130407Sdfr 556130407Sdfr#ifdef MAC 557130407Sdfr /* 558130407Sdfr * Tag the mbuf with an appropriate MAC label before any other 559130407Sdfr * consumers can get to it. 560130407Sdfr */ 561130407Sdfr mac_create_mbuf_from_ifnet(ifp, m); 562130407Sdfr#endif 563130407Sdfr 564130407Sdfr /* 565130407Sdfr * Give bpf a chance at the packet. The link-level driver 566130407Sdfr * should have left us a tag with the EUID of the sender. 567130407Sdfr */ 568130407Sdfr if (ifp->if_bpf) { 569130407Sdfr struct fw_bpfhdr h; 570130407Sdfr struct m_tag *mtag; 571130407Sdfr 572130407Sdfr mtag = m_tag_locate(m, MTAG_FIREWIRE, MTAG_FIREWIRE_SENDER_EUID, 0); 573130407Sdfr if (mtag) 574130407Sdfr bcopy(mtag + 1, h.firewire_shost, 8); 575130407Sdfr else 576130407Sdfr bcopy(&firewire_broadcastaddr, h.firewire_dhost, 8); 577130407Sdfr bcopy(&fc->fc_hwaddr, h.firewire_dhost, 8); 578130407Sdfr h.firewire_type = htons(type); 579130407Sdfr bpf_mtap2(ifp->if_bpf, &h, sizeof(h), m); 580130407Sdfr } 581130407Sdfr 582130407Sdfr if (ifp->if_flags & IFF_MONITOR) { 583130407Sdfr /* 584130407Sdfr * Interface marked for monitoring; discard packet. 585130407Sdfr */ 586130407Sdfr m_freem(m); 587130407Sdfr return; 588130407Sdfr } 589130407Sdfr 590130407Sdfr ifp->if_ibytes += m->m_pkthdr.len; 591130407Sdfr 592130407Sdfr /* Discard packet if interface is not up */ 593130407Sdfr if ((ifp->if_flags & IFF_UP) == 0) { 594130407Sdfr m_freem(m); 595130407Sdfr return; 596130407Sdfr } 597130407Sdfr 598130407Sdfr if (m->m_flags & (M_BCAST|M_MCAST)) 599130407Sdfr ifp->if_imcasts++; 600130407Sdfr 601130407Sdfr switch (type) { 602130407Sdfr#ifdef INET 603130407Sdfr case ETHERTYPE_IP: 604130407Sdfr if (ip_fastforward(m)) 605130407Sdfr return; 606130407Sdfr isr = NETISR_IP; 607130407Sdfr break; 608130407Sdfr 609130407Sdfr case ETHERTYPE_ARP: 610130407Sdfr { 611130407Sdfr struct arphdr *ah; 612130407Sdfr ah = mtod(m, struct arphdr *); 613130407Sdfr 614130407Sdfr /* 615130407Sdfr * Adjust the arp packet to insert an empty tha slot. 616130407Sdfr */ 617130407Sdfr m->m_len += ah->ar_hln; 618130407Sdfr m->m_pkthdr.len += ah->ar_hln; 619130407Sdfr bcopy(ar_tha(ah), ar_tpa(ah), ah->ar_pln); 620130407Sdfr isr = NETISR_ARP; 621130407Sdfr break; 622130407Sdfr } 623130407Sdfr#endif 624130407Sdfr 625130407Sdfr#ifdef INET6 626130407Sdfr case ETHERTYPE_IPV6: 627130407Sdfr isr = NETISR_IPV6; 628130407Sdfr break; 629130407Sdfr#endif 630130407Sdfr 631130407Sdfr default: 632130407Sdfr m_freem(m); 633130407Sdfr return; 634130407Sdfr } 635130407Sdfr 636130407Sdfr netisr_dispatch(isr, m); 637130407Sdfr} 638130407Sdfr 639130407Sdfrint 640130407Sdfrfirewire_ioctl(struct ifnet *ifp, int command, caddr_t data) 641130407Sdfr{ 642130407Sdfr struct ifaddr *ifa = (struct ifaddr *) data; 643130407Sdfr struct ifreq *ifr = (struct ifreq *) data; 644130407Sdfr int error = 0; 645130407Sdfr 646130407Sdfr switch (command) { 647130407Sdfr case SIOCSIFADDR: 648130407Sdfr ifp->if_flags |= IFF_UP; 649130407Sdfr 650130407Sdfr switch (ifa->ifa_addr->sa_family) { 651130407Sdfr#ifdef INET 652130407Sdfr case AF_INET: 653130407Sdfr ifp->if_init(ifp->if_softc); /* before arpwhohas */ 654130407Sdfr arp_ifinit(ifp, ifa); 655130407Sdfr break; 656130407Sdfr#endif 657130407Sdfr default: 658130407Sdfr ifp->if_init(ifp->if_softc); 659130407Sdfr break; 660130407Sdfr } 661130407Sdfr break; 662130407Sdfr 663130407Sdfr case SIOCGIFADDR: 664130407Sdfr { 665130407Sdfr struct sockaddr *sa; 666130407Sdfr 667130407Sdfr sa = (struct sockaddr *) & ifr->ifr_data; 668130407Sdfr bcopy(&IFP2FC(ifp)->fc_hwaddr, 669130407Sdfr (caddr_t) sa->sa_data, sizeof(struct fw_hwaddr)); 670130407Sdfr } 671130407Sdfr break; 672130407Sdfr 673130407Sdfr case SIOCSIFMTU: 674130407Sdfr /* 675130407Sdfr * Set the interface MTU. 676130407Sdfr */ 677130407Sdfr if (ifr->ifr_mtu > 1500) { 678130407Sdfr error = EINVAL; 679130407Sdfr } else { 680130407Sdfr ifp->if_mtu = ifr->ifr_mtu; 681130407Sdfr } 682130407Sdfr break; 683130407Sdfr default: 684130407Sdfr error = EINVAL; /* XXX netbsd has ENOTTY??? */ 685130407Sdfr break; 686130407Sdfr } 687130407Sdfr return (error); 688130407Sdfr} 689130407Sdfr 690130407Sdfrstatic int 691130407Sdfrfirewire_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 692130407Sdfr struct sockaddr *sa) 693130407Sdfr{ 694130407Sdfr#ifdef INET 695130407Sdfr struct sockaddr_in *sin; 696130407Sdfr#endif 697130407Sdfr#ifdef INET6 698130407Sdfr struct sockaddr_in6 *sin6; 699130407Sdfr#endif 700130407Sdfr 701130407Sdfr switch(sa->sa_family) { 702130407Sdfr case AF_LINK: 703130407Sdfr /* 704130407Sdfr * No mapping needed. 705130407Sdfr */ 706130407Sdfr *llsa = 0; 707130407Sdfr return 0; 708130407Sdfr 709130407Sdfr#ifdef INET 710130407Sdfr case AF_INET: 711130407Sdfr sin = (struct sockaddr_in *)sa; 712130407Sdfr if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 713130407Sdfr return EADDRNOTAVAIL; 714130407Sdfr *llsa = 0; 715130407Sdfr return 0; 716130407Sdfr#endif 717130407Sdfr#ifdef INET6 718130407Sdfr case AF_INET6: 719130407Sdfr sin6 = (struct sockaddr_in6 *)sa; 720130407Sdfr if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 721130407Sdfr /* 722130407Sdfr * An IP6 address of 0 means listen to all 723130407Sdfr * of the Ethernet multicast address used for IP6. 724130407Sdfr * (This is used for multicast routers.) 725130407Sdfr */ 726130407Sdfr ifp->if_flags |= IFF_ALLMULTI; 727130407Sdfr *llsa = 0; 728130407Sdfr return 0; 729130407Sdfr } 730130407Sdfr if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 731130407Sdfr return EADDRNOTAVAIL; 732130407Sdfr *llsa = 0; 733130407Sdfr return 0; 734130407Sdfr#endif 735130407Sdfr 736130407Sdfr default: 737130407Sdfr /* 738130407Sdfr * Well, the text isn't quite right, but it's the name 739130407Sdfr * that counts... 740130407Sdfr */ 741130407Sdfr return EAFNOSUPPORT; 742130407Sdfr } 743130407Sdfr} 744130407Sdfr 745130407Sdfrvoid 746130407Sdfrfirewire_ifattach(struct ifnet *ifp, struct fw_hwaddr *llc) 747130407Sdfr{ 748147256Sbrooks struct fw_com *fc = IFP2FC(ifp); 749130407Sdfr struct ifaddr *ifa; 750130407Sdfr struct sockaddr_dl *sdl; 751130407Sdfr static const char* speeds[] = { 752130407Sdfr "S100", "S200", "S400", "S800", 753130407Sdfr "S1600", "S3200" 754130407Sdfr }; 755130407Sdfr 756130407Sdfr fc->fc_speed = llc->sspd; 757130407Sdfr STAILQ_INIT(&fc->fc_frags); 758130407Sdfr 759130407Sdfr ifp->if_addrlen = sizeof(struct fw_hwaddr); 760130407Sdfr ifp->if_hdrlen = 0; 761130407Sdfr if_attach(ifp); 762130407Sdfr ifp->if_mtu = 1500; /* XXX */ 763130407Sdfr ifp->if_output = firewire_output; 764130407Sdfr ifp->if_resolvemulti = firewire_resolvemulti; 765130407Sdfr ifp->if_broadcastaddr = (u_char *) &firewire_broadcastaddr; 766130407Sdfr 767130407Sdfr ifa = ifaddr_byindex(ifp->if_index); 768130407Sdfr KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 769130407Sdfr sdl = (struct sockaddr_dl *)ifa->ifa_addr; 770130407Sdfr sdl->sdl_type = IFT_IEEE1394; 771130407Sdfr sdl->sdl_alen = ifp->if_addrlen; 772130407Sdfr bcopy(llc, LLADDR(sdl), ifp->if_addrlen); 773130407Sdfr 774130407Sdfr bpfattach(ifp, DLT_APPLE_IP_OVER_IEEE1394, 775130407Sdfr sizeof(struct fw_hwaddr)); 776130407Sdfr 777130407Sdfr if_printf(ifp, "Firewire address: %8D @ 0x%04x%08x, %s, maxrec %d\n", 778130407Sdfr (uint8_t *) &llc->sender_unique_ID_hi, ":", 779130407Sdfr ntohs(llc->sender_unicast_FIFO_hi), 780130407Sdfr ntohl(llc->sender_unicast_FIFO_lo), 781130407Sdfr speeds[llc->sspd], 782130407Sdfr (2 << llc->sender_max_rec)); 783130407Sdfr} 784130407Sdfr 785130407Sdfrvoid 786130407Sdfrfirewire_ifdetach(struct ifnet *ifp) 787130407Sdfr{ 788130407Sdfr bpfdetach(ifp); 789130407Sdfr if_detach(ifp); 790130407Sdfr} 791130407Sdfr 792130407Sdfrvoid 793130407Sdfrfirewire_busreset(struct ifnet *ifp) 794130407Sdfr{ 795147256Sbrooks struct fw_com *fc = IFP2FC(ifp); 796130407Sdfr struct fw_reass *r; 797130407Sdfr struct mbuf *m; 798130407Sdfr 799130407Sdfr /* 800130407Sdfr * Discard any partial datagrams since the host ids may have changed. 801130407Sdfr */ 802130407Sdfr while ((r = STAILQ_FIRST(&fc->fc_frags))) { 803130407Sdfr STAILQ_REMOVE_HEAD(&fc->fc_frags, fr_link); 804130407Sdfr while (r->fr_frags) { 805130407Sdfr m = r->fr_frags; 806130407Sdfr r->fr_frags = m->m_nextpkt; 807130407Sdfr m_freem(m); 808130407Sdfr } 809130407Sdfr free(r, M_TEMP); 810130407Sdfr } 811130407Sdfr} 812147256Sbrooks 813147256Sbrooksstatic void * 814147256Sbrooksfirewire_alloc(u_char type, struct ifnet *ifp) 815147256Sbrooks{ 816147256Sbrooks struct fw_com *fc; 817147256Sbrooks 818147256Sbrooks fc = malloc(sizeof(struct fw_com), M_FWCOM, M_WAITOK | M_ZERO); 819147256Sbrooks fc->fc_ifp = ifp; 820147256Sbrooks 821147256Sbrooks return (fc); 822147256Sbrooks} 823147256Sbrooks 824147256Sbrooksstatic void 825147256Sbrooksfirewire_free(void *com, u_char type) 826147256Sbrooks{ 827147256Sbrooks 828147256Sbrooks free(com, M_FWCOM); 829147256Sbrooks} 830147256Sbrooks 831147256Sbrooksstatic int 832147256Sbrooksfirewire_modevent(module_t mod, int type, void *data) 833147256Sbrooks{ 834147256Sbrooks 835147256Sbrooks switch (type) { 836147256Sbrooks case MOD_LOAD: 837147256Sbrooks if_register_com_alloc(IFT_IEEE1394, 838147256Sbrooks firewire_alloc, firewire_free); 839147256Sbrooks break; 840147256Sbrooks case MOD_UNLOAD: 841147256Sbrooks if_deregister_com_alloc(IFT_IEEE1394); 842147256Sbrooks break; 843147256Sbrooks default: 844147256Sbrooks return (EOPNOTSUPP); 845147256Sbrooks } 846147256Sbrooks 847147256Sbrooks return (0); 848147256Sbrooks} 849147256Sbrooks 850147256Sbrooksstatic moduledata_t firewire_mod = { 851147256Sbrooks "firewire", 852147256Sbrooks firewire_modevent, 853147256Sbrooks 0 854147256Sbrooks}; 855147256Sbrooks 856147256SbrooksDECLARE_MODULE(firewire, firewire_mod, SI_SUB_INIT_IF, SI_ORDER_ANY); 857147256SbrooksMODULE_VERSION(firewire, 1); 858