sys/dev/netif/pdq_layer/pdq_ifsubr.c

   1 /*-
   2  * Copyright (c) 1995, 1996 Matt Thomas <matt@3am-software.com>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. The name of the author may not be used to endorse or promote products
  11  *    derived from this software withough specific prior written permission
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  14  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  15  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  16  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  17  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  18  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  19  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  20  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  22  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  *
  24  * $FreeBSD: src/sys/dev/pdq/pdq_ifsubr.c,v 1.11.2.1 2000/08/02 22:39:30 peter Exp $
  25  * $DragonFly: src/sys/dev/netif/pdq_layer/Attic/pdq_ifsubr.c,v 1.16 2006/11/07 06:43:23 dillon Exp $
  26  *
  27  */
  28
  29 /*
  30  * DEC PDQ FDDI Controller; code for BSD derived operating systems
  31  *
  32  *      This module provide bus independent BSD specific O/S functions.
  33  *      (ie. it provides an ifnet interface to the rest of the system)
  34  */
  35
  36
  37 #include "opt_inet.h"
  38
  39 #include <sys/param.h>
  40 #include <sys/socket.h>
  41 #include <sys/sockio.h>
  42 #include <sys/thread2.h>
  43 #if defined(__bsdi__) || defined(__NetBSD__)
  44 #include <sys/device.h>
  45 #endif
  46
  47 #include <net/if.h>
  48 #include <net/ifq_var.h>
  49 #include <net/if_dl.h>
  50
  51 #include <net/bpf.h>
  52
  53 #if defined(__DragonFly__) || defined(__FreeBSD__)
  54 #ifdef INET
  55 #include <netinet/in.h>
  56 #include <netinet/if_ether.h>
  57 #endif
  58 #include <netinet/if_fddi.h>
  59 #else
  60 #include <net/if_fddi.h>
  61 #endif
  62
  63 #if defined(__bsdi__)
  64 #include <machine_base/isa/isavar.h>
  65 #endif
  66
  67 #ifdef NS
  68 #include <netns/ns.h>
  69 #include <netns/ns_if.h>
  70 #endif
  71
  72 #if defined(__DragonFly__) || defined(__FreeBSD__)
  73 #include "pdqvar.h"
  74 #include "pdqreg.h"
  75 #else
  76 #include "pdqvar.h"
  77 #include "pdqreg.h"
  78 #endif
  79
  80 #if defined(__bsdi__) && _BSDI_VERSION < 199506 /* XXX */
  81 static void
  82 arp_ifinit(
  83     struct arpcom *ac,
  84     struct ifaddr *ifa)
  85 {
  86     sc->sc_ac.ac_ipaddr = IA_SIN(ifa)->sin_addr;
  87     arpwhohas(&sc->sc_ac, &IA_SIN(ifa)->sin_addr);
  88 #if _BSDI_VERSION >= 199401
  89     ifa->ifa_rtrequest = arp_rtrequest;
  90     ifa->ifa_flags |= RTF_CLONING;
  91 #endif
  92 }
  93 #endif
  94
  95
  96 void
  97 pdq_ifinit(
  98     pdq_softc_t *sc)
  99 {
 100     if (sc->sc_if.if_flags & IFF_UP) {
 101         sc->sc_if.if_flags |= IFF_RUNNING;
 102         if (sc->sc_if.if_flags & IFF_PROMISC) {
 103             sc->sc_pdq->pdq_flags |= PDQ_PROMISC;
 104         } else {
 105             sc->sc_pdq->pdq_flags &= ~PDQ_PROMISC;
 106         }
 107         if (sc->sc_if.if_flags & IFF_ALLMULTI) {
 108             sc->sc_pdq->pdq_flags |= PDQ_ALLMULTI;
 109         } else {
 110             sc->sc_pdq->pdq_flags &= ~PDQ_ALLMULTI;
 111         }
 112         if (sc->sc_if.if_flags & IFF_LINK1) {
 113             sc->sc_pdq->pdq_flags |= PDQ_PASS_SMT;
 114         } else {
 115             sc->sc_pdq->pdq_flags &= ~PDQ_PASS_SMT;
 116         }
 117         sc->sc_pdq->pdq_flags |= PDQ_RUNNING;
 118         pdq_run(sc->sc_pdq);
 119     } else {
 120         sc->sc_if.if_flags &= ~IFF_RUNNING;
 121         sc->sc_pdq->pdq_flags &= ~PDQ_RUNNING;
 122         pdq_stop(sc->sc_pdq);
 123     }
 124 }
 125 \f
 126 void
 127 pdq_ifwatchdog(
 128     struct ifnet *ifp)
 129 {
 130     /*
 131      * No progress was made on the transmit queue for PDQ_OS_TX_TRANSMIT
 132      * seconds.  Remove all queued packets.
 133      */
 134
 135     ifp->if_flags &= ~IFF_OACTIVE;
 136     ifp->if_timer = 0;
 137     ifq_purge(&ifp->if_snd);
 138 }
 139
 140 ifnet_ret_t
 141 pdq_ifstart(
 142     struct ifnet *ifp)
 143 {
 144     pdq_softc_t *sc = (pdq_softc_t *) ((caddr_t) ifp - offsetof(pdq_softc_t, sc_ac.ac_if));
 145     struct mbuf *m;
 146     int tx = 0;
 147
 148     if ((ifp->if_flags & IFF_RUNNING) == 0)
 149         return;
 150
 151     if (sc->sc_if.if_timer == 0)
 152         sc->sc_if.if_timer = PDQ_OS_TX_TIMEOUT;
 153
 154     if ((sc->sc_pdq->pdq_flags & PDQ_TXOK) == 0) {
 155         sc->sc_if.if_flags |= IFF_OACTIVE;
 156         return;
 157     }
 158     for (;; tx = 1) {
 159         m = ifq_poll(&ifp->if_snd);
 160         if (m == NULL)
 161             break;
 162
 163         if (pdq_queue_transmit_data(ifp, sc->sc_pdq, m) == PDQ_FALSE) {
 164             break;
 165         }
 166     }
 167     if (tx)
 168         PDQ_DO_TYPE2_PRODUCER(sc->sc_pdq);
 169 }
 170 \f
 171 void
 172 pdq_os_receive_pdu(
 173     pdq_t *pdq,
 174     struct mbuf *m,
 175     size_t pktlen)
 176 {
 177     pdq_softc_t *sc = (pdq_softc_t *) pdq->pdq_os_ctx;
 178     struct fddi_header *fh = mtod(m, struct fddi_header *);
 179
 180     sc->sc_if.if_ipackets++;
 181     BPF_MTAP(&sc->sc_if, m);
 182     if ((fh->fddi_fc & (FDDIFC_L|FDDIFC_F)) != FDDIFC_LLC_ASYNC) {
 183         m_freem(m);
 184         return;
 185     }
 186
 187     m->m_pkthdr.len = pktlen;
 188     sc->sc_if.if_input(&sc->sc_if, m);
 189 }
 190
 191 void
 192 pdq_os_restart_transmitter(
 193     pdq_t *pdq)
 194 {
 195     pdq_softc_t *sc = (pdq_softc_t *) pdq->pdq_os_ctx;
 196     sc->sc_if.if_flags &= ~IFF_OACTIVE;
 197     if (ifq_is_empty(&sc->sc_if.if_snd)) {
 198         pdq_ifstart(&sc->sc_if);
 199         sc->sc_if.if_timer = PDQ_OS_TX_TIMEOUT;
 200     } else {
 201         sc->sc_if.if_timer = 0;
 202     }
 203 }
 204
 205 void
 206 pdq_os_transmit_done(
 207     pdq_t *pdq,
 208     struct mbuf *m)
 209 {
 210     pdq_softc_t *sc = (pdq_softc_t *) pdq->pdq_os_ctx;
 211     BPF_MTAP(&sc->sc_if, m);
 212     m_freem(m);
 213     sc->sc_if.if_opackets++;
 214 }
 215 \f
 216 void
 217 pdq_os_addr_fill(
 218     pdq_t *pdq,
 219     pdq_lanaddr_t *addr,
 220     size_t num_addrs)
 221 {
 222     pdq_softc_t *sc = (pdq_softc_t *) pdq->pdq_os_ctx;
 223     struct ifmultiaddr *ifma;
 224
 225     LIST_FOREACH(ifma, &sc->sc_if.if_multiaddrs, ifma_link) {
 226             char *mcaddr;
 227             if (ifma->ifma_addr->sa_family != AF_LINK)
 228                     continue;
 229             mcaddr = LLADDR((struct sockaddr_dl *)ifma->ifma_addr);
 230             ((u_short *) addr->lanaddr_bytes)[0] = ((u_short *) mcaddr)[0];
 231             ((u_short *) addr->lanaddr_bytes)[1] = ((u_short *) mcaddr)[1];
 232             ((u_short *) addr->lanaddr_bytes)[2] = ((u_short *) mcaddr)[2];
 233             addr++;
 234             num_addrs--;
 235     }
 236 }
 237 \f
 238 int
 239 pdq_ifioctl(struct ifnet *ifp, ioctl_cmd_t cmd, caddr_t data, struct ucred *cr)
 240 {
 241     pdq_softc_t *sc = (pdq_softc_t *) ((caddr_t) ifp - offsetof(pdq_softc_t, sc_ac.ac_if));
 242     int error = 0;
 243
 244     crit_enter();
 245
 246     switch (cmd) {
 247         case SIOCSIFADDR: {
 248             struct ifaddr *ifa = (struct ifaddr *)data;
 249
 250             ifp->if_flags |= IFF_UP;
 251             switch(ifa->ifa_addr->sa_family) {
 252 #if defined(INET)
 253                 case AF_INET: {
 254                     pdq_ifinit(sc);
 255                     arp_ifinit(&sc->sc_ac.ac_if, ifa);
 256                     break;
 257                 }
 258 #endif /* INET */
 259
 260 #if defined(NS)
 261                 /* This magic copied from if_is.c; I don't use XNS,
 262                  * so I have no way of telling if this actually
 263                  * works or not.
 264                  */
 265                 case AF_NS: {
 266                     struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr);
 267                     if (ns_nullhost(*ina)) {
 268                         ina->x_host = *(union ns_host *)(sc->sc_ac.ac_enaddr);
 269                     } else {
 270                         ifp->if_flags &= ~IFF_RUNNING;
 271                         bcopy((caddr_t)ina->x_host.c_host,
 272                               (caddr_t)sc->sc_ac.ac_enaddr,
 273                               sizeof sc->sc_ac.ac_enaddr);
 274                     }
 275
 276                     pdq_ifinit(sc);
 277                     break;
 278                 }
 279 #endif /* NS */
 280
 281                 default: {
 282                     pdq_ifinit(sc);
 283                     break;
 284                 }
 285             }
 286             break;
 287         }
 288         case SIOCGIFADDR: {
 289             struct ifreq *ifr = (struct ifreq *)data;
 290             bcopy((caddr_t) sc->sc_ac.ac_enaddr,
 291                   (caddr_t) ((struct sockaddr *)&ifr->ifr_data)->sa_data,
 292                   6);
 293             break;
 294         }
 295
 296         case SIOCSIFFLAGS: {
 297             pdq_ifinit(sc);
 298             break;
 299         }
 300
 301         case SIOCADDMULTI:
 302         case SIOCDELMULTI:
 303                 /*
 304                  * Update multicast listeners
 305                  */
 306                 if (sc->sc_if.if_flags & IFF_RUNNING)
 307                         pdq_run(sc->sc_pdq);
 308                 error = 0;
 309                 break;
 310
 311 #if defined(SIOCSIFMTU)
 312 #if !defined(ifr_mtu)
 313 #define ifr_mtu ifr_metric
 314 #endif
 315         case SIOCSIFMTU: {
 316             struct ifreq *ifr = (struct ifreq *)data;
 317             /*
 318              * Set the interface MTU.
 319              */
 320             if (ifr->ifr_mtu > FDDIMTU) {
 321                 error = EINVAL;
 322                 break;
 323             }
 324             ifp->if_mtu = ifr->ifr_mtu;
 325             break;
 326         }
 327 #endif /* SIOCSIFMTU */
 328
 329         default: {
 330             error = EINVAL;
 331             break;
 332         }
 333     }
 334
 335     crit_exit();
 336
 337     return error;
 338 }
 339 \f
 340 #ifndef IFF_NOTRAILERS
 341 #define IFF_NOTRAILERS  0
 342 #endif
 343
 344 void
 345 pdq_ifattach(
 346     pdq_softc_t *sc,
 347     ifnet_ret_t (*ifwatchdog)(int unit))
 348 {
 349     struct ifnet *ifp = &sc->sc_if;
 350
 351     ifp->if_flags = IFF_BROADCAST|IFF_SIMPLEX|IFF_NOTRAILERS|IFF_MULTICAST;
 352
 353 #if defined(__DragonFly__) || (defined(__FreeBSD__) && BSD >= 199506) || defined(__NetBSD__)
 354     ifp->if_watchdog = pdq_ifwatchdog;
 355 #else
 356     ifp->if_watchdog = ifwatchdog;
 357 #endif
 358
 359     ifp->if_ioctl = pdq_ifioctl;
 360     ifp->if_start = pdq_ifstart;
 361     ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
 362     ifq_set_ready(&ifp->if_snd);
 363
 364     fddi_ifattach(ifp, NULL);
 365 }