if_fwsubr.c revision 139823
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 139823 2005-01-07 01:45:51Z imp $ 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> 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#include <netinet/ip_fw.h> 60130407Sdfr#include <netinet/ip_dummynet.h> 61130407Sdfr#endif 62130407Sdfr#ifdef INET6 63130407Sdfr#include <netinet6/nd6.h> 64130407Sdfr#endif 65130407Sdfr 66130407Sdfr#define IFP2FC(IFP) ((struct fw_com *)IFP) 67130407Sdfr 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{ 81130407Sdfr struct fw_com *fc = (struct fw_com *) ifp; 82130407Sdfr int error, type; 83130407Sdfr struct rtentry *rt; 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 94130429Sdfr error = mac_check_ifnet_transmit(ifp, m); 95130429Sdfr if (error) 96130429Sdfr goto bad; 97130429Sdfr#endif 98130429Sdfr 99130407Sdfr if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) { 100130407Sdfr error = ENETDOWN; 101130407Sdfr goto bad; 102130407Sdfr } 103130407Sdfr 104130407Sdfr error = rt_check(&rt, &rt0, dst); 105130407Sdfr if (error) 106130407Sdfr goto bad; 107130407Sdfr 108130407Sdfr /* 109130407Sdfr * For unicast, we make a tag to store the lladdr of the 110130407Sdfr * destination. This might not be the first time we have seen 111130407Sdfr * the packet (for instance, the arp code might be trying to 112130407Sdfr * re-send it after receiving an arp reply) so we only 113130407Sdfr * allocate a tag if there isn't one there already. For 114130407Sdfr * multicast, we will eventually use a different tag to store 115130407Sdfr * the channel number. 116130407Sdfr */ 117130407Sdfr unicast = !(m->m_flags & (M_BCAST | M_MCAST)); 118130407Sdfr if (unicast) { 119130407Sdfr mtag = m_tag_locate(m, MTAG_FIREWIRE, MTAG_FIREWIRE_HWADDR, NULL); 120130407Sdfr if (!mtag) { 121130407Sdfr mtag = m_tag_alloc(MTAG_FIREWIRE, MTAG_FIREWIRE_HWADDR, 122130407Sdfr sizeof (struct fw_hwaddr), M_NOWAIT); 123130407Sdfr if (!mtag) { 124130407Sdfr error = ENOMEM; 125130407Sdfr goto bad; 126130407Sdfr } 127130407Sdfr m_tag_prepend(m, mtag); 128130407Sdfr } 129130407Sdfr destfw = (struct fw_hwaddr *)(mtag + 1); 130130407Sdfr } else { 131130407Sdfr destfw = 0; 132130407Sdfr } 133130407Sdfr 134130407Sdfr switch (dst->sa_family) { 135130407Sdfr#ifdef AF_INET 136130407Sdfr case AF_INET: 137130407Sdfr /* 138130407Sdfr * Only bother with arp for unicast. Allocation of 139130407Sdfr * channels etc. for firewire is quite different and 140130407Sdfr * doesn't fit into the arp model. 141130407Sdfr */ 142130407Sdfr if (unicast) { 143130407Sdfr error = arpresolve(ifp, rt, m, dst, (u_char *) destfw); 144130407Sdfr if (error) 145130407Sdfr return (error == EWOULDBLOCK ? 0 : error); 146130407Sdfr } 147130407Sdfr type = ETHERTYPE_IP; 148130407Sdfr break; 149130407Sdfr 150130407Sdfr case AF_ARP: 151130407Sdfr { 152130407Sdfr struct arphdr *ah; 153130407Sdfr ah = mtod(m, struct arphdr *); 154130407Sdfr ah->ar_hrd = htons(ARPHRD_IEEE1394); 155130407Sdfr type = ETHERTYPE_ARP; 156130407Sdfr if (unicast) 157130407Sdfr *destfw = *(struct fw_hwaddr *) ar_tha(ah); 158130407Sdfr 159130407Sdfr /* 160130407Sdfr * The standard arp code leaves a hole for the target 161130407Sdfr * hardware address which we need to close up. 162130407Sdfr */ 163130407Sdfr bcopy(ar_tpa(ah), ar_tha(ah), ah->ar_pln); 164130407Sdfr m_adj(m, -ah->ar_hln); 165130407Sdfr break; 166130407Sdfr } 167130407Sdfr#endif 168130407Sdfr 169130407Sdfr#ifdef INET6 170130407Sdfr case AF_INET6: 171130407Sdfr if (unicast) { 172130407Sdfr error = nd6_storelladdr(&fc->fc_if, rt, m, dst, 173130407Sdfr (u_char *) destfw); 174130407Sdfr if (error) 175130407Sdfr return (error); 176130407Sdfr } 177130407Sdfr type = ETHERTYPE_IPV6; 178130407Sdfr break; 179130407Sdfr#endif 180130407Sdfr 181130407Sdfr default: 182130407Sdfr if_printf(ifp, "can't handle af%d\n", dst->sa_family); 183130407Sdfr error = EAFNOSUPPORT; 184130407Sdfr goto bad; 185130407Sdfr } 186130407Sdfr 187130407Sdfr /* 188130407Sdfr * Let BPF tap off a copy before we encapsulate. 189130407Sdfr */ 190130407Sdfr if (ifp->if_bpf) { 191130407Sdfr struct fw_bpfhdr h; 192130407Sdfr if (unicast) 193130407Sdfr bcopy(destfw, h.firewire_dhost, 8); 194130407Sdfr else 195130407Sdfr bcopy(&firewire_broadcastaddr, h.firewire_dhost, 8); 196130407Sdfr bcopy(&fc->fc_hwaddr, h.firewire_shost, 8); 197130407Sdfr h.firewire_type = htons(type); 198130407Sdfr bpf_mtap2(ifp->if_bpf, &h, sizeof(h), m); 199130407Sdfr } 200130407Sdfr 201130407Sdfr /* 202130407Sdfr * Punt on MCAP for now and send all multicast packets on the 203130407Sdfr * broadcast channel. 204130407Sdfr */ 205130407Sdfr if (m->m_flags & M_MCAST) 206130407Sdfr m->m_flags |= M_BCAST; 207130407Sdfr 208130407Sdfr /* 209130407Sdfr * Figure out what speed to use and what the largest supported 210130407Sdfr * packet size is. For unicast, this is the minimum of what we 211130407Sdfr * can speak and what they can hear. For broadcast, lets be 212130407Sdfr * conservative and use S100. We could possibly improve that 213130407Sdfr * by examining the bus manager's speed map or similar. We 214130407Sdfr * also reduce the packet size for broadcast to account for 215130407Sdfr * the GASP header. 216130407Sdfr */ 217130407Sdfr if (unicast) { 218130407Sdfr speed = min(fc->fc_speed, destfw->sspd); 219130407Sdfr psize = min(512 << speed, 2 << destfw->sender_max_rec); 220130407Sdfr } else { 221130407Sdfr speed = 0; 222130407Sdfr psize = 512 - 2*sizeof(uint32_t); 223130407Sdfr } 224130407Sdfr 225130407Sdfr /* 226130407Sdfr * Next, we encapsulate, possibly fragmenting the original 227130407Sdfr * datagram if it won't fit into a single packet. 228130407Sdfr */ 229130407Sdfr if (m->m_pkthdr.len <= psize - sizeof(uint32_t)) { 230130407Sdfr /* 231130407Sdfr * No fragmentation is necessary. 232130407Sdfr */ 233130407Sdfr M_PREPEND(m, sizeof(uint32_t), M_DONTWAIT); 234130407Sdfr if (!m) { 235130407Sdfr error = ENOBUFS; 236130407Sdfr goto bad; 237130407Sdfr } 238130407Sdfr enc = mtod(m, union fw_encap *); 239130407Sdfr enc->unfrag.ether_type = type; 240130407Sdfr enc->unfrag.lf = FW_ENCAP_UNFRAG; 241130407Sdfr 242130407Sdfr /* 243130407Sdfr * Byte swap the encapsulation header manually. 244130407Sdfr */ 245130407Sdfr enc->ul[0] = htonl(enc->ul[0]); 246130407Sdfr 247130549Smlaier IFQ_HANDOFF(ifp, m, error); 248130549Smlaier return (error); 249130407Sdfr } else { 250130407Sdfr /* 251130407Sdfr * Fragment the datagram, making sure to leave enough 252130407Sdfr * space for the encapsulation header in each packet. 253130407Sdfr */ 254130407Sdfr fsize = psize - 2*sizeof(uint32_t); 255130407Sdfr dgl = next_dgl++; 256130407Sdfr dsize = m->m_pkthdr.len; 257130407Sdfr foff = 0; 258130407Sdfr while (m) { 259130407Sdfr if (m->m_pkthdr.len > fsize) { 260130407Sdfr /* 261130407Sdfr * Split off the tail segment from the 262130407Sdfr * datagram, copying our tags over. 263130407Sdfr */ 264130407Sdfr mtail = m_split(m, fsize, M_DONTWAIT); 265130407Sdfr m_tag_copy_chain(mtail, m, M_NOWAIT); 266130407Sdfr } else { 267130407Sdfr mtail = 0; 268130407Sdfr } 269130407Sdfr 270130407Sdfr /* 271130407Sdfr * Add our encapsulation header to this 272130407Sdfr * fragment and hand it off to the link. 273130407Sdfr */ 274130407Sdfr M_PREPEND(m, 2*sizeof(uint32_t), M_DONTWAIT); 275130407Sdfr if (!m) { 276130407Sdfr error = ENOBUFS; 277130407Sdfr goto bad; 278130407Sdfr } 279130407Sdfr enc = mtod(m, union fw_encap *); 280130407Sdfr if (foff == 0) { 281130407Sdfr enc->firstfrag.lf = FW_ENCAP_FIRST; 282130407Sdfr enc->firstfrag.datagram_size = dsize - 1; 283130407Sdfr enc->firstfrag.ether_type = type; 284130407Sdfr enc->firstfrag.dgl = dgl; 285130407Sdfr } else { 286130407Sdfr if (mtail) 287130407Sdfr enc->nextfrag.lf = FW_ENCAP_NEXT; 288130407Sdfr else 289130407Sdfr enc->nextfrag.lf = FW_ENCAP_LAST; 290130407Sdfr enc->nextfrag.datagram_size = dsize - 1; 291130407Sdfr enc->nextfrag.fragment_offset = foff; 292130407Sdfr enc->nextfrag.dgl = dgl; 293130407Sdfr } 294130407Sdfr foff += m->m_pkthdr.len - 2*sizeof(uint32_t); 295130407Sdfr 296130407Sdfr /* 297130407Sdfr * Byte swap the encapsulation header manually. 298130407Sdfr */ 299130407Sdfr enc->ul[0] = htonl(enc->ul[0]); 300130407Sdfr enc->ul[1] = htonl(enc->ul[1]); 301130407Sdfr 302130549Smlaier IFQ_HANDOFF(ifp, m, error); 303130549Smlaier if (error) { 304130407Sdfr if (mtail) 305130407Sdfr m_freem(mtail); 306130407Sdfr return (ENOBUFS); 307130407Sdfr } 308130407Sdfr 309130407Sdfr m = mtail; 310130407Sdfr } 311130407Sdfr 312130407Sdfr return (0); 313130407Sdfr } 314130407Sdfr 315130407Sdfrbad: 316130407Sdfr if (m) 317130407Sdfr m_freem(m); 318130407Sdfr return (error); 319130407Sdfr} 320130407Sdfr 321130407Sdfrstatic struct mbuf * 322130407Sdfrfirewire_input_fragment(struct fw_com *fc, struct mbuf *m, int src) 323130407Sdfr{ 324130407Sdfr union fw_encap *enc; 325130407Sdfr struct fw_reass *r; 326130407Sdfr struct mbuf *mf, *mprev; 327130407Sdfr int dsize; 328130407Sdfr int fstart, fend, start, end, islast; 329130407Sdfr uint32_t id; 330130407Sdfr 331134246Srwatson GIANT_REQUIRED; 332134246Srwatson 333130407Sdfr /* 334130407Sdfr * Find an existing reassembly buffer or create a new one. 335130407Sdfr */ 336130407Sdfr enc = mtod(m, union fw_encap *); 337130407Sdfr id = enc->firstfrag.dgl | (src << 16); 338130407Sdfr STAILQ_FOREACH(r, &fc->fc_frags, fr_link) 339130407Sdfr if (r->fr_id == id) 340130407Sdfr break; 341130407Sdfr if (!r) { 342130407Sdfr r = malloc(sizeof(struct fw_reass), M_TEMP, M_NOWAIT); 343130407Sdfr if (!r) { 344130407Sdfr m_freem(m); 345130407Sdfr return 0; 346130407Sdfr } 347130407Sdfr r->fr_id = id; 348130407Sdfr r->fr_frags = 0; 349130407Sdfr STAILQ_INSERT_HEAD(&fc->fc_frags, r, fr_link); 350130407Sdfr } 351130407Sdfr 352130407Sdfr /* 353130407Sdfr * If this fragment overlaps any other fragment, we must discard 354130407Sdfr * the partial reassembly and start again. 355130407Sdfr */ 356130407Sdfr if (enc->firstfrag.lf == FW_ENCAP_FIRST) 357130407Sdfr fstart = 0; 358130407Sdfr else 359130407Sdfr fstart = enc->nextfrag.fragment_offset; 360130407Sdfr fend = fstart + m->m_pkthdr.len - 2*sizeof(uint32_t); 361130407Sdfr dsize = enc->nextfrag.datagram_size; 362130407Sdfr islast = (enc->nextfrag.lf == FW_ENCAP_LAST); 363130407Sdfr 364130407Sdfr for (mf = r->fr_frags; mf; mf = mf->m_nextpkt) { 365130407Sdfr enc = mtod(mf, union fw_encap *); 366130407Sdfr if (enc->nextfrag.datagram_size != dsize) { 367130407Sdfr /* 368130407Sdfr * This fragment must be from a different 369130407Sdfr * packet. 370130407Sdfr */ 371130407Sdfr goto bad; 372130407Sdfr } 373130407Sdfr if (enc->firstfrag.lf == FW_ENCAP_FIRST) 374130407Sdfr start = 0; 375130407Sdfr else 376130407Sdfr start = enc->nextfrag.fragment_offset; 377130407Sdfr end = start + mf->m_pkthdr.len - 2*sizeof(uint32_t); 378130407Sdfr if ((fstart < end && fend > start) || 379130407Sdfr (islast && enc->nextfrag.lf == FW_ENCAP_LAST)) { 380130407Sdfr /* 381130407Sdfr * Overlap - discard reassembly buffer and start 382130407Sdfr * again with this fragment. 383130407Sdfr */ 384130407Sdfr goto bad; 385130407Sdfr } 386130407Sdfr } 387130407Sdfr 388130407Sdfr /* 389130407Sdfr * Find where to put this fragment in the list. 390130407Sdfr */ 391130407Sdfr for (mf = r->fr_frags, mprev = NULL; mf; 392130407Sdfr mprev = mf, mf = mf->m_nextpkt) { 393130407Sdfr enc = mtod(mf, union fw_encap *); 394130407Sdfr if (enc->firstfrag.lf == FW_ENCAP_FIRST) 395130407Sdfr start = 0; 396130407Sdfr else 397130407Sdfr start = enc->nextfrag.fragment_offset; 398130407Sdfr if (start >= fend) 399130407Sdfr break; 400130407Sdfr } 401130407Sdfr 402130407Sdfr /* 403130407Sdfr * If this is a last fragment and we are not adding at the end 404130407Sdfr * of the list, discard the buffer. 405130407Sdfr */ 406130407Sdfr if (islast && mprev && mprev->m_nextpkt) 407130407Sdfr goto bad; 408130407Sdfr 409130407Sdfr if (mprev) { 410130407Sdfr m->m_nextpkt = mprev->m_nextpkt; 411130407Sdfr mprev->m_nextpkt = m; 412130407Sdfr 413130407Sdfr /* 414130407Sdfr * Coalesce forwards and see if we can make a whole 415130407Sdfr * datagram. 416130407Sdfr */ 417130407Sdfr enc = mtod(mprev, union fw_encap *); 418130407Sdfr if (enc->firstfrag.lf == FW_ENCAP_FIRST) 419130407Sdfr start = 0; 420130407Sdfr else 421130407Sdfr start = enc->nextfrag.fragment_offset; 422130407Sdfr end = start + mprev->m_pkthdr.len - 2*sizeof(uint32_t); 423130407Sdfr while (end == fstart) { 424130407Sdfr /* 425130407Sdfr * Strip off the encap header from m and 426130407Sdfr * append it to mprev, freeing m. 427130407Sdfr */ 428130407Sdfr m_adj(m, 2*sizeof(uint32_t)); 429130407Sdfr mprev->m_nextpkt = m->m_nextpkt; 430130407Sdfr mprev->m_pkthdr.len += m->m_pkthdr.len; 431130407Sdfr m_cat(mprev, m); 432130407Sdfr 433130407Sdfr if (mprev->m_pkthdr.len == dsize + 1 + 2*sizeof(uint32_t)) { 434130407Sdfr /* 435130407Sdfr * We have assembled a complete packet 436130407Sdfr * we must be finished. Make sure we have 437130407Sdfr * merged the whole chain. 438130407Sdfr */ 439130407Sdfr STAILQ_REMOVE(&fc->fc_frags, r, fw_reass, fr_link); 440130407Sdfr free(r, M_TEMP); 441130407Sdfr m = mprev->m_nextpkt; 442130407Sdfr while (m) { 443130407Sdfr mf = m->m_nextpkt; 444130407Sdfr m_freem(m); 445130407Sdfr m = mf; 446130407Sdfr } 447130407Sdfr mprev->m_nextpkt = NULL; 448130407Sdfr 449130407Sdfr return (mprev); 450130407Sdfr } 451130407Sdfr 452130407Sdfr /* 453130407Sdfr * See if we can continue merging forwards. 454130407Sdfr */ 455130407Sdfr end = fend; 456130407Sdfr m = mprev->m_nextpkt; 457130407Sdfr if (m) { 458130407Sdfr enc = mtod(m, union fw_encap *); 459130407Sdfr if (enc->firstfrag.lf == FW_ENCAP_FIRST) 460130407Sdfr fstart = 0; 461130407Sdfr else 462130407Sdfr fstart = enc->nextfrag.fragment_offset; 463130407Sdfr fend = fstart + m->m_pkthdr.len 464130407Sdfr - 2*sizeof(uint32_t); 465130407Sdfr } else { 466130407Sdfr break; 467130407Sdfr } 468130407Sdfr } 469130407Sdfr } else { 470130407Sdfr m->m_nextpkt = 0; 471130407Sdfr r->fr_frags = m; 472130407Sdfr } 473130407Sdfr 474130407Sdfr return (0); 475130407Sdfr 476130407Sdfrbad: 477130407Sdfr while (r->fr_frags) { 478130407Sdfr mf = r->fr_frags; 479130407Sdfr r->fr_frags = mf->m_nextpkt; 480130407Sdfr m_freem(mf); 481130407Sdfr } 482130407Sdfr m->m_nextpkt = 0; 483130407Sdfr r->fr_frags = m; 484130407Sdfr 485130407Sdfr return (0); 486130407Sdfr} 487130407Sdfr 488130407Sdfrvoid 489130407Sdfrfirewire_input(struct ifnet *ifp, struct mbuf *m, uint16_t src) 490130407Sdfr{ 491130407Sdfr struct fw_com *fc = (struct fw_com *) ifp; 492130407Sdfr union fw_encap *enc; 493130407Sdfr int type, isr; 494130407Sdfr 495130407Sdfr GIANT_REQUIRED; 496130407Sdfr 497130407Sdfr /* 498130407Sdfr * The caller has already stripped off the packet header 499130407Sdfr * (stream or wreqb) and marked the mbuf's M_BCAST flag 500130407Sdfr * appropriately. We de-encapsulate the IP packet and pass it 501130407Sdfr * up the line after handling link-level fragmentation. 502130407Sdfr */ 503130407Sdfr if (m->m_pkthdr.len < sizeof(uint32_t)) { 504130407Sdfr if_printf(ifp, "discarding frame without " 505130407Sdfr "encapsulation header (len %u pkt len %u)\n", 506130407Sdfr m->m_len, m->m_pkthdr.len); 507130407Sdfr } 508130407Sdfr 509130407Sdfr m = m_pullup(m, sizeof(uint32_t)); 510130407Sdfr enc = mtod(m, union fw_encap *); 511130407Sdfr 512130407Sdfr /* 513130407Sdfr * Byte swap the encapsulation header manually. 514130407Sdfr */ 515130407Sdfr enc->ul[0] = htonl(enc->ul[0]); 516130407Sdfr 517130407Sdfr if (enc->unfrag.lf != 0) { 518130407Sdfr m = m_pullup(m, 2*sizeof(uint32_t)); 519130407Sdfr if (!m) 520130407Sdfr return; 521130407Sdfr enc = mtod(m, union fw_encap *); 522130407Sdfr enc->ul[1] = htonl(enc->ul[1]); 523130407Sdfr m = firewire_input_fragment(fc, m, src); 524130407Sdfr if (!m) 525130407Sdfr return; 526130407Sdfr enc = mtod(m, union fw_encap *); 527130407Sdfr type = enc->firstfrag.ether_type; 528130407Sdfr m_adj(m, 2*sizeof(uint32_t)); 529130407Sdfr } else { 530130407Sdfr type = enc->unfrag.ether_type; 531130407Sdfr m_adj(m, sizeof(uint32_t)); 532130407Sdfr } 533130407Sdfr 534130407Sdfr if (m->m_pkthdr.rcvif == NULL) { 535130407Sdfr if_printf(ifp, "discard frame w/o interface pointer\n"); 536130407Sdfr ifp->if_ierrors++; 537130407Sdfr m_freem(m); 538130407Sdfr return; 539130407Sdfr } 540130407Sdfr#ifdef DIAGNOSTIC 541130407Sdfr if (m->m_pkthdr.rcvif != ifp) { 542130407Sdfr if_printf(ifp, "Warning, frame marked as received on %s\n", 543130407Sdfr m->m_pkthdr.rcvif->if_xname); 544130407Sdfr } 545130407Sdfr#endif 546130407Sdfr 547130407Sdfr#ifdef MAC 548130407Sdfr /* 549130407Sdfr * Tag the mbuf with an appropriate MAC label before any other 550130407Sdfr * consumers can get to it. 551130407Sdfr */ 552130407Sdfr mac_create_mbuf_from_ifnet(ifp, m); 553130407Sdfr#endif 554130407Sdfr 555130407Sdfr /* 556130407Sdfr * Give bpf a chance at the packet. The link-level driver 557130407Sdfr * should have left us a tag with the EUID of the sender. 558130407Sdfr */ 559130407Sdfr if (ifp->if_bpf) { 560130407Sdfr struct fw_bpfhdr h; 561130407Sdfr struct m_tag *mtag; 562130407Sdfr 563130407Sdfr mtag = m_tag_locate(m, MTAG_FIREWIRE, MTAG_FIREWIRE_SENDER_EUID, 0); 564130407Sdfr if (mtag) 565130407Sdfr bcopy(mtag + 1, h.firewire_shost, 8); 566130407Sdfr else 567130407Sdfr bcopy(&firewire_broadcastaddr, h.firewire_dhost, 8); 568130407Sdfr bcopy(&fc->fc_hwaddr, h.firewire_dhost, 8); 569130407Sdfr h.firewire_type = htons(type); 570130407Sdfr bpf_mtap2(ifp->if_bpf, &h, sizeof(h), m); 571130407Sdfr } 572130407Sdfr 573130407Sdfr if (ifp->if_flags & IFF_MONITOR) { 574130407Sdfr /* 575130407Sdfr * Interface marked for monitoring; discard packet. 576130407Sdfr */ 577130407Sdfr m_freem(m); 578130407Sdfr return; 579130407Sdfr } 580130407Sdfr 581130407Sdfr ifp->if_ibytes += m->m_pkthdr.len; 582130407Sdfr 583130407Sdfr /* Discard packet if interface is not up */ 584130407Sdfr if ((ifp->if_flags & IFF_UP) == 0) { 585130407Sdfr m_freem(m); 586130407Sdfr return; 587130407Sdfr } 588130407Sdfr 589130407Sdfr if (m->m_flags & (M_BCAST|M_MCAST)) 590130407Sdfr ifp->if_imcasts++; 591130407Sdfr 592130407Sdfr switch (type) { 593130407Sdfr#ifdef INET 594130407Sdfr case ETHERTYPE_IP: 595130407Sdfr if (ip_fastforward(m)) 596130407Sdfr return; 597130407Sdfr isr = NETISR_IP; 598130407Sdfr break; 599130407Sdfr 600130407Sdfr case ETHERTYPE_ARP: 601130407Sdfr { 602130407Sdfr struct arphdr *ah; 603130407Sdfr ah = mtod(m, struct arphdr *); 604130407Sdfr 605130407Sdfr /* 606130407Sdfr * Adjust the arp packet to insert an empty tha slot. 607130407Sdfr */ 608130407Sdfr m->m_len += ah->ar_hln; 609130407Sdfr m->m_pkthdr.len += ah->ar_hln; 610130407Sdfr bcopy(ar_tha(ah), ar_tpa(ah), ah->ar_pln); 611130407Sdfr isr = NETISR_ARP; 612130407Sdfr break; 613130407Sdfr } 614130407Sdfr#endif 615130407Sdfr 616130407Sdfr#ifdef INET6 617130407Sdfr case ETHERTYPE_IPV6: 618130407Sdfr isr = NETISR_IPV6; 619130407Sdfr break; 620130407Sdfr#endif 621130407Sdfr 622130407Sdfr default: 623130407Sdfr m_freem(m); 624130407Sdfr return; 625130407Sdfr } 626130407Sdfr 627130407Sdfr netisr_dispatch(isr, m); 628130407Sdfr} 629130407Sdfr 630130407Sdfrint 631130407Sdfrfirewire_ioctl(struct ifnet *ifp, int command, caddr_t data) 632130407Sdfr{ 633130407Sdfr struct ifaddr *ifa = (struct ifaddr *) data; 634130407Sdfr struct ifreq *ifr = (struct ifreq *) data; 635130407Sdfr int error = 0; 636130407Sdfr 637130407Sdfr switch (command) { 638130407Sdfr case SIOCSIFADDR: 639130407Sdfr ifp->if_flags |= IFF_UP; 640130407Sdfr 641130407Sdfr switch (ifa->ifa_addr->sa_family) { 642130407Sdfr#ifdef INET 643130407Sdfr case AF_INET: 644130407Sdfr ifp->if_init(ifp->if_softc); /* before arpwhohas */ 645130407Sdfr arp_ifinit(ifp, ifa); 646130407Sdfr break; 647130407Sdfr#endif 648130407Sdfr default: 649130407Sdfr ifp->if_init(ifp->if_softc); 650130407Sdfr break; 651130407Sdfr } 652130407Sdfr break; 653130407Sdfr 654130407Sdfr case SIOCGIFADDR: 655130407Sdfr { 656130407Sdfr struct sockaddr *sa; 657130407Sdfr 658130407Sdfr sa = (struct sockaddr *) & ifr->ifr_data; 659130407Sdfr bcopy(&IFP2FC(ifp)->fc_hwaddr, 660130407Sdfr (caddr_t) sa->sa_data, sizeof(struct fw_hwaddr)); 661130407Sdfr } 662130407Sdfr break; 663130407Sdfr 664130407Sdfr case SIOCSIFMTU: 665130407Sdfr /* 666130407Sdfr * Set the interface MTU. 667130407Sdfr */ 668130407Sdfr if (ifr->ifr_mtu > 1500) { 669130407Sdfr error = EINVAL; 670130407Sdfr } else { 671130407Sdfr ifp->if_mtu = ifr->ifr_mtu; 672130407Sdfr } 673130407Sdfr break; 674130407Sdfr default: 675130407Sdfr error = EINVAL; /* XXX netbsd has ENOTTY??? */ 676130407Sdfr break; 677130407Sdfr } 678130407Sdfr return (error); 679130407Sdfr} 680130407Sdfr 681130407Sdfrstatic int 682130407Sdfrfirewire_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 683130407Sdfr struct sockaddr *sa) 684130407Sdfr{ 685130407Sdfr#ifdef INET 686130407Sdfr struct sockaddr_in *sin; 687130407Sdfr#endif 688130407Sdfr#ifdef INET6 689130407Sdfr struct sockaddr_in6 *sin6; 690130407Sdfr#endif 691130407Sdfr 692130407Sdfr switch(sa->sa_family) { 693130407Sdfr case AF_LINK: 694130407Sdfr /* 695130407Sdfr * No mapping needed. 696130407Sdfr */ 697130407Sdfr *llsa = 0; 698130407Sdfr return 0; 699130407Sdfr 700130407Sdfr#ifdef INET 701130407Sdfr case AF_INET: 702130407Sdfr sin = (struct sockaddr_in *)sa; 703130407Sdfr if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 704130407Sdfr return EADDRNOTAVAIL; 705130407Sdfr *llsa = 0; 706130407Sdfr return 0; 707130407Sdfr#endif 708130407Sdfr#ifdef INET6 709130407Sdfr case AF_INET6: 710130407Sdfr sin6 = (struct sockaddr_in6 *)sa; 711130407Sdfr if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 712130407Sdfr /* 713130407Sdfr * An IP6 address of 0 means listen to all 714130407Sdfr * of the Ethernet multicast address used for IP6. 715130407Sdfr * (This is used for multicast routers.) 716130407Sdfr */ 717130407Sdfr ifp->if_flags |= IFF_ALLMULTI; 718130407Sdfr *llsa = 0; 719130407Sdfr return 0; 720130407Sdfr } 721130407Sdfr if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 722130407Sdfr return EADDRNOTAVAIL; 723130407Sdfr *llsa = 0; 724130407Sdfr return 0; 725130407Sdfr#endif 726130407Sdfr 727130407Sdfr default: 728130407Sdfr /* 729130407Sdfr * Well, the text isn't quite right, but it's the name 730130407Sdfr * that counts... 731130407Sdfr */ 732130407Sdfr return EAFNOSUPPORT; 733130407Sdfr } 734130407Sdfr} 735130407Sdfr 736130407Sdfrvoid 737130407Sdfrfirewire_ifattach(struct ifnet *ifp, struct fw_hwaddr *llc) 738130407Sdfr{ 739130407Sdfr struct fw_com *fc = (struct fw_com *) ifp; 740130407Sdfr struct ifaddr *ifa; 741130407Sdfr struct sockaddr_dl *sdl; 742130407Sdfr static const char* speeds[] = { 743130407Sdfr "S100", "S200", "S400", "S800", 744130407Sdfr "S1600", "S3200" 745130407Sdfr }; 746130407Sdfr 747130407Sdfr fc->fc_speed = llc->sspd; 748130407Sdfr STAILQ_INIT(&fc->fc_frags); 749130407Sdfr 750130407Sdfr ifp->if_type = IFT_IEEE1394; 751130407Sdfr ifp->if_addrlen = sizeof(struct fw_hwaddr); 752130407Sdfr ifp->if_hdrlen = 0; 753130407Sdfr if_attach(ifp); 754130407Sdfr ifp->if_mtu = 1500; /* XXX */ 755130407Sdfr ifp->if_output = firewire_output; 756130407Sdfr ifp->if_resolvemulti = firewire_resolvemulti; 757130407Sdfr ifp->if_broadcastaddr = (u_char *) &firewire_broadcastaddr; 758130407Sdfr 759130407Sdfr ifa = ifaddr_byindex(ifp->if_index); 760130407Sdfr KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 761130407Sdfr sdl = (struct sockaddr_dl *)ifa->ifa_addr; 762130407Sdfr sdl->sdl_type = IFT_IEEE1394; 763130407Sdfr sdl->sdl_alen = ifp->if_addrlen; 764130407Sdfr bcopy(llc, LLADDR(sdl), ifp->if_addrlen); 765130407Sdfr 766130407Sdfr bpfattach(ifp, DLT_APPLE_IP_OVER_IEEE1394, 767130407Sdfr sizeof(struct fw_hwaddr)); 768130407Sdfr 769130407Sdfr if_printf(ifp, "Firewire address: %8D @ 0x%04x%08x, %s, maxrec %d\n", 770130407Sdfr (uint8_t *) &llc->sender_unique_ID_hi, ":", 771130407Sdfr ntohs(llc->sender_unicast_FIFO_hi), 772130407Sdfr ntohl(llc->sender_unicast_FIFO_lo), 773130407Sdfr speeds[llc->sspd], 774130407Sdfr (2 << llc->sender_max_rec)); 775130407Sdfr} 776130407Sdfr 777130407Sdfrvoid 778130407Sdfrfirewire_ifdetach(struct ifnet *ifp) 779130407Sdfr{ 780130407Sdfr bpfdetach(ifp); 781130407Sdfr if_detach(ifp); 782130407Sdfr} 783130407Sdfr 784130407Sdfrvoid 785130407Sdfrfirewire_busreset(struct ifnet *ifp) 786130407Sdfr{ 787130407Sdfr struct fw_com *fc = (struct fw_com *) ifp; 788130407Sdfr struct fw_reass *r; 789130407Sdfr struct mbuf *m; 790130407Sdfr 791130407Sdfr /* 792130407Sdfr * Discard any partial datagrams since the host ids may have changed. 793130407Sdfr */ 794130407Sdfr while ((r = STAILQ_FIRST(&fc->fc_frags))) { 795130407Sdfr STAILQ_REMOVE_HEAD(&fc->fc_frags, fr_link); 796130407Sdfr while (r->fr_frags) { 797130407Sdfr m = r->fr_frags; 798130407Sdfr r->fr_frags = m->m_nextpkt; 799130407Sdfr m_freem(m); 800130407Sdfr } 801130407Sdfr free(r, M_TEMP); 802130407Sdfr } 803130407Sdfr} 804