sys/net/i4b/driver/i4b_isppp.c

   1 /*
   2  *   Copyright (c) 1997 Joerg Wunsch. All rights reserved.
   3  *
   4  *   Copyright (c) 1997, 2000 Hellmuth Michaelis. All rights reserved.
   5  *
   6  *   Redistribution and use in source and binary forms, with or without
   7  *   modification, are permitted provided that the following conditions
   8  *   are met:
   9  *
  10  *   1. Redistributions of source code must retain the above copyright
  11  *      notice, this list of conditions and the following disclaimer.
  12  *   2. Redistributions in binary form must reproduce the above copyright
  13  *      notice, this list of conditions and the following disclaimer in the
  14  *      documentation and/or other materials provided with the distribution.
  15  *
  16  *   THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  *   ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  *   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  *   ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  *   FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  *   OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  *   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  *   LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  *   OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  *   SUCH DAMAGE.
  27  *
  28  *---------------------------------------------------------------------------
  29  *
  30  *      i4b_isppp.c - isdn4bsd kernel SyncPPP driver
  31  *      --------------------------------------------
  32  *
  33  *      Uses Serge Vakulenko's sppp backend (originally contributed with
  34  *      the "cx" driver for Cronyx's HDLC-in-hardware device).  This driver
  35  *      is only the glue between sppp and i4b.
  36  *
  37  *      $Id: i4b_isppp.c,v 1.44 2000/08/31 07:07:26 hm Exp $
  38  *
  39  * $FreeBSD: src/sys/i4b/driver/i4b_isppp.c,v 1.7.2.3 2003/02/06 14:50:53 gj Exp $
  40  * $DragonFly: src/sys/net/i4b/driver/i4b_isppp.c,v 1.3 2003/08/07 21:17:25 dillon Exp $
  41  *
  42  *      last edit-date: [Thu Aug 31 09:02:27 2000]
  43  *
  44  *---------------------------------------------------------------------------*/
  45
  46
  47 #ifndef __NetBSD__
  48 #endif
  49 #include "use_i4bisppp.h"
  50
  51 #ifndef __NetBSD__
  52 #if NI4BISPPP == 0
  53 # error "You need to define `device sppp <N>' with options ISPPP"
  54 #endif
  55 #endif
  56
  57 #include <sys/param.h>
  58 #include <sys/systm.h>
  59 #include <sys/mbuf.h>
  60 #include <sys/socket.h>
  61 #include <sys/errno.h>
  62 #include <sys/ioccom.h>
  63 #include <sys/sockio.h>
  64 #include <sys/kernel.h>
  65
  66 #include <net/if.h>
  67 #include <net/if_types.h>
  68 #include <net/if_sppp.h>
  69
  70
  71 #if defined(__FreeBSD_version) &&  __FreeBSD_version >= 400008
  72 #include "use_bpf.h"
  73 #else
  74 #include "bpfilter.h"
  75 #endif
  76 #if NBPFILTER > 0 || NBPF > 0
  77 #include <sys/time.h>
  78 #include <net/bpf.h>
  79 #endif
  80
  81 #ifdef __FreeBSD__
  82 #include <net/i4b/include/machine/i4b_debug.h>
  83 #include <net/i4b/include/machine/i4b_ioctl.h>
  84 #else
  85 #include <i4b/i4b_ioctl.h>
  86 #include <i4b/i4b_cause.h>
  87 #include <i4b/i4b_debug.h>
  88 #endif
  89
  90 #include "../include/i4b_global.h"
  91 #include "../include/i4b_l3l4.h"
  92 #include "../layer4/i4b_l4.h"
  93
  94 #ifdef __FreeBSD__
  95 #define ISPPP_FMT       "isp%d: "
  96 #define ISPPP_ARG(sc)   ((sc)->sc_if.if_unit)
  97 #define PDEVSTATIC      static
  98 #define IFP2UNIT(ifp)   (ifp)->if_unit
  99
 100 # if __FreeBSD_version >= 300001
 101 #  define CALLOUT_INIT(chan)            callout_handle_init(chan)
 102 #  define TIMEOUT(fun, arg, chan, tick) chan = timeout(fun, arg, tick)
 103 #  define UNTIMEOUT(fun, arg, chan)     untimeout(fun, arg, chan)
 104 #  define IOCTL_CMD_T u_long
 105 # else
 106 #  define CALLOUT_INIT(chan)            do {} while(0)
 107 #  define TIMEOUT(fun, arg, chan, tick) timeout(fun, arg, tick)
 108 #  define UNTIMEOUT(fun, arg, chan)     untimeout(fun, arg)
 109 #  define IOCTL_CMD_T int
 110 # endif
 111
 112 #elif defined __NetBSD__ || defined __OpenBSD__
 113 #define ISPPP_FMT       "%s: "
 114 #define ISPPP_ARG(sc)   ((sc)->sc_if.if_xname)
 115 #define PDEVSTATIC      /* not static */
 116 #define IOCTL_CMD_T     u_long
 117 #define IFP2UNIT(ifp)   ((struct i4bisppp_softc *)ifp->if_softc)->sc_unit
 118 #else
 119 # error "What system are you using?"
 120 #endif
 121
 122 #ifdef __FreeBSD__
 123 PDEVSTATIC void i4bispppattach(void *);
 124 PSEUDO_SET(i4bispppattach, i4b_isppp);
 125 #else
 126 PDEVSTATIC void i4bispppattach(void);
 127 #endif
 128
 129 #define I4BISPPPACCT            1       /* enable accounting messages */
 130 #define I4BISPPPACCTINTVL       2       /* accounting msg interval in secs */
 131 #define I4BISPPPDISCDEBUG       1
 132
 133 #define PPP_HDRLEN              4       /* 4 octetts PPP header length  */
 134
 135 struct i4bisppp_softc {
 136         /*
 137          * struct sppp starts with a struct ifnet, but we gotta allocate
 138          * more space for it.  NB: do not relocate this union, it must
 139          * be first in isppp_softc.  The tls and tlf hooks below want to
 140          * convert a ``struct sppp *'' into a ``struct isppp_softc *''.
 141          */
 142         union {
 143                 struct ifnet scu_if;
 144                 struct sppp scu_sp;
 145         } sc_if_un;
 146 #define sc_if sc_if_un.scu_if
 147
 148         int     sc_state;       /* state of the interface       */
 149
 150 #ifndef __FreeBSD__
 151         int     sc_unit;        /* unit number for Net/OpenBSD  */
 152 #endif
 153
 154         call_desc_t *sc_cdp;    /* ptr to call descriptor       */
 155
 156 #ifdef I4BISPPPACCT
 157         int sc_iinb;            /* isdn driver # of inbytes     */
 158         int sc_ioutb;           /* isdn driver # of outbytes    */
 159         int sc_inb;             /* # of bytes rx'd              */
 160         int sc_outb;            /* # of bytes tx'd              */
 161         int sc_linb;            /* last # of bytes rx'd         */
 162         int sc_loutb;           /* last # of bytes tx'd         */
 163         int sc_fn;              /* flag, first null acct        */
 164 #endif
 165
 166 #if defined(__FreeBSD_version) && __FreeBSD_version >= 300001
 167         struct callout_handle sc_ch;
 168 #endif
 169
 170 } i4bisppp_softc[NI4BISPPP];
 171
 172 static void     i4bisppp_init_linktab(int unit);
 173 static int      i4bisppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, caddr_t data);
 174
 175 #if 0
 176 static void     i4bisppp_send(struct ifnet *ifp);
 177 #endif
 178
 179 static void     i4bisppp_start(struct ifnet *ifp);
 180
 181 #if 0 /* never used ??? */
 182 static void     i4bisppp_timeout(void *cookie);
 183 #endif
 184
 185 static void     i4bisppp_tls(struct sppp *sp);
 186 static void     i4bisppp_tlf(struct sppp *sp);
 187 static void     i4bisppp_state_changed(struct sppp *sp, int new_state);
 188 static void     i4bisppp_negotiation_complete(struct sppp *sp);
 189 static void     i4bisppp_watchdog(struct ifnet *ifp);
 190 time_t          i4bisppp_idletime(int unit);
 191
 192 /* initialized by L4 */
 193
 194 static drvr_link_t i4bisppp_drvr_linktab[NI4BISPPP];
 195 static isdn_link_t *isdn_linktab[NI4BISPPP];
 196
 197 enum i4bisppp_states {
 198         ST_IDLE,                        /* initialized, ready, idle     */
 199         ST_DIALING,                     /* dialling out to remote       */
 200         ST_CONNECTED,                   /* connected to remote          */
 201 };
 202
 203 /*===========================================================================*
 204  *                      DEVICE DRIVER ROUTINES
 205  *===========================================================================*/
 206
 207 /*---------------------------------------------------------------------------*
 208  *      interface attach routine at kernel boot time
 209  *---------------------------------------------------------------------------*/
 210 PDEVSTATIC void
 211 #ifdef __FreeBSD__
 212 i4bispppattach(void *dummy)
 213 #else
 214 i4bispppattach()
 215 #endif
 216 {
 217         struct i4bisppp_softc *sc = i4bisppp_softc;
 218         int i;
 219
 220 #ifndef HACK_NO_PSEUDO_ATTACH_MSG
 221 #ifdef SPPP_VJ
 222         printf("i4bisppp: %d ISDN SyncPPP device(s) attached (VJ header compression)\n", NI4BISPPP);
 223 #else
 224         printf("i4bisppp: %d ISDN SyncPPP device(s) attached\n", NI4BISPPP);
 225 #endif
 226 #endif
 227
 228         for(i = 0; i < NI4BISPPP; sc++, i++) {
 229                 i4bisppp_init_linktab(i);
 230
 231                 sc->sc_if.if_softc = sc;
 232
 233 #ifdef __FreeBSD__
 234                 sc->sc_if.if_name = "isp";
 235 #if defined(__FreeBSD_version) && __FreeBSD_version < 300001
 236                 sc->sc_if.if_next = NULL;
 237 #endif
 238                 sc->sc_if.if_unit = i;
 239 #else
 240                 sprintf(sc->sc_if.if_xname, "isp%d", i);
 241                 sc->sc_unit = i;
 242 #endif
 243
 244                 sc->sc_if.if_mtu = PP_MTU;
 245
 246 #ifdef __NetBSD__
 247                 sc->sc_if.if_flags = IFF_SIMPLEX | IFF_POINTOPOINT |
 248                                         IFF_MULTICAST;
 249 #else
 250                 sc->sc_if.if_flags = IFF_SIMPLEX | IFF_POINTOPOINT;
 251 #endif
 252
 253                 sc->sc_if.if_type = IFT_ISDNBASIC;
 254                 sc->sc_state = ST_IDLE;
 255
 256                 sc->sc_if.if_ioctl = i4bisppp_ioctl;
 257
 258                 /* actually initialized by sppp_attach() */
 259                 /* sc->sc_if.if_output = sppp_output; */
 260
 261                 sc->sc_if.if_start = i4bisppp_start;
 262
 263                 sc->sc_if.if_hdrlen = 0;
 264                 sc->sc_if.if_addrlen = 0;
 265                 sc->sc_if.if_snd.ifq_maxlen = IFQ_MAXLEN;
 266
 267                 sc->sc_if.if_ipackets = 0;
 268                 sc->sc_if.if_ierrors = 0;
 269                 sc->sc_if.if_opackets = 0;
 270                 sc->sc_if.if_oerrors = 0;
 271                 sc->sc_if.if_collisions = 0;
 272                 sc->sc_if.if_ibytes = 0;
 273                 sc->sc_if.if_obytes = 0;
 274                 sc->sc_if.if_imcasts = 0;
 275                 sc->sc_if.if_omcasts = 0;
 276                 sc->sc_if.if_iqdrops = 0;
 277                 sc->sc_if.if_noproto = 0;
 278
 279 #if I4BISPPPACCT
 280                 sc->sc_if.if_timer = 0;
 281                 sc->sc_if.if_watchdog = i4bisppp_watchdog;
 282                 sc->sc_iinb = 0;
 283                 sc->sc_ioutb = 0;
 284                 sc->sc_inb = 0;
 285                 sc->sc_outb = 0;
 286                 sc->sc_linb = 0;
 287                 sc->sc_loutb = 0;
 288                 sc->sc_fn = 1;
 289 #endif
 290
 291                 sc->sc_if_un.scu_sp.pp_tls = i4bisppp_tls;
 292                 sc->sc_if_un.scu_sp.pp_tlf = i4bisppp_tlf;
 293                 sc->sc_if_un.scu_sp.pp_con = i4bisppp_negotiation_complete;
 294                 sc->sc_if_un.scu_sp.pp_chg = i4bisppp_state_changed;
 295
 296                 sppp_attach(&sc->sc_if);
 297 #if defined(__FreeBSD_version) && ((__FreeBSD_version >= 500009) || (410000 <= __FreeBSD_version && __FreeBSD_version < 500000))
 298                 /* do not call bpfattach in ether_ifattach */
 299                 ether_ifattach(&sc->sc_if, 0);
 300 #else
 301                 if_attach(&sc->sc_if);
 302 #endif
 303
 304 #if NBPFILTER > 0 || NBPF > 0
 305 #ifdef __FreeBSD__
 306                 bpfattach(&sc->sc_if, DLT_PPP, PPP_HDRLEN);
 307                 CALLOUT_INIT(&sc->sc_ch);
 308 #endif /* __FreeBSD__ */
 309 #ifdef __NetBSD__
 310                 bpfattach(&sc->sc_if.if_bpf, &sc->sc_if, DLT_PPP, sizeof(u_int));
 311 #endif
 312 #endif
 313         }
 314 }
 315
 316 /*---------------------------------------------------------------------------*
 317  *      process ioctl
 318  *---------------------------------------------------------------------------*/
 319 static int
 320 i4bisppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, caddr_t data)
 321 {
 322         struct i4bisppp_softc *sc = ifp->if_softc;
 323 #if 0
 324         struct sppp *sp = (struct sppp *)sc;
 325         struct ifaddr *ifa = (struct ifaddr *) data;
 326         struct ifreq *ifr = (struct ifreq *) data;
 327 #endif
 328
 329         int error;
 330
 331         error = sppp_ioctl(&sc->sc_if, cmd, data);
 332         if (error)
 333                 return error;
 334
 335         switch(cmd) {
 336         case SIOCSIFFLAGS:
 337 #if 0 /* never used ??? */
 338                 x = splimp();
 339                 if ((ifp->if_flags & IFF_UP) == 0)
 340                         UNTIMEOUT(i4bisppp_timeout, (void *)sp, sc->sc_ch);
 341                 splx(x);
 342 #endif
 343                 break;
 344         }
 345
 346         return 0;
 347 }
 348
 349 /*---------------------------------------------------------------------------*
 350  *      start output to ISDN B-channel
 351  *---------------------------------------------------------------------------*/
 352 static void
 353 i4bisppp_start(struct ifnet *ifp)
 354 {
 355         struct i4bisppp_softc *sc = ifp->if_softc;
 356         struct mbuf *m;
 357         /* int s; */
 358         int unit = IFP2UNIT(ifp);
 359
 360         if (sppp_isempty(ifp))
 361                 return;
 362
 363         if(sc->sc_state != ST_CONNECTED)
 364                 return;
 365
 366         /*
 367          * s = splimp();
 368          * ifp->if_flags |= IFF_OACTIVE; // - need to clear this somewhere
 369          * splx(s);
 370          */
 371
 372         while ((m = sppp_dequeue(&sc->sc_if)) != NULL)
 373         {
 374
 375 #if NBPFILTER > 0 || NBPF > 0
 376 #ifdef __FreeBSD__
 377                 if (ifp->if_bpf)
 378                         bpf_mtap(ifp, m);
 379 #endif /* __FreeBSD__ */
 380
 381 #ifdef __NetBSD__
 382                 if (ifp->if_bpf)
 383                         bpf_mtap(ifp->if_bpf, m);
 384 #endif
 385 #endif /* NBPFILTER > 0 || NBPF > 0 */
 386
 387                 microtime(&ifp->if_lastchange);
 388
 389                 IF_LOCK(isdn_linktab[unit]->tx_queue);
 390                 if(_IF_QFULL(isdn_linktab[unit]->tx_queue))
 391                 {
 392                         NDBGL4(L4_ISPDBG, "isp%d, tx queue full!", unit);
 393                         m_freem(m);
 394                 }
 395                 else
 396                 {
 397 #if 0
 398                         sc->sc_if.if_obytes += m->m_pkthdr.len;
 399 #endif
 400                         sc->sc_outb += m->m_pkthdr.len;
 401                         sc->sc_if.if_opackets++;
 402
 403                         _IF_ENQUEUE(isdn_linktab[unit]->tx_queue, m);
 404                 }
 405                 IF_UNLOCK(isdn_linktab[unit]->tx_queue);
 406         }
 407         isdn_linktab[unit]->bch_tx_start(isdn_linktab[unit]->unit,
 408                                          isdn_linktab[unit]->channel);
 409 }
 410
 411 #ifdef I4BISPPPACCT
 412 /*---------------------------------------------------------------------------*
 413  *      watchdog routine
 414  *---------------------------------------------------------------------------*/
 415 static void
 416 i4bisppp_watchdog(struct ifnet *ifp)
 417 {
 418         struct i4bisppp_softc *sc = ifp->if_softc;
 419         int unit = IFP2UNIT(ifp);
 420         bchan_statistics_t bs;
 421
 422         (*isdn_linktab[unit]->bch_stat)
 423                 (isdn_linktab[unit]->unit, isdn_linktab[unit]->channel, &bs);
 424
 425         sc->sc_ioutb += bs.outbytes;
 426         sc->sc_iinb += bs.inbytes;
 427
 428         if((sc->sc_iinb != sc->sc_linb) || (sc->sc_ioutb != sc->sc_loutb) || sc->sc_fn)
 429         {
 430                 int ri = (sc->sc_iinb - sc->sc_linb)/I4BISPPPACCTINTVL;
 431                 int ro = (sc->sc_ioutb - sc->sc_loutb)/I4BISPPPACCTINTVL;
 432
 433                 if((sc->sc_iinb == sc->sc_linb) && (sc->sc_ioutb == sc->sc_loutb))
 434                         sc->sc_fn = 0;
 435                 else
 436                         sc->sc_fn = 1;
 437
 438                 sc->sc_linb = sc->sc_iinb;
 439                 sc->sc_loutb = sc->sc_ioutb;
 440
 441                 i4b_l4_accounting(BDRV_ISPPP, unit, ACCT_DURING,
 442                          sc->sc_ioutb, sc->sc_iinb, ro, ri, sc->sc_outb, sc->sc_inb);
 443         }
 444         sc->sc_if.if_timer = I4BISPPPACCTINTVL;
 445
 446 #if 0 /* old stuff, keep it around */
 447         printf(ISPPP_FMT "transmit timeout\n", ISPPP_ARG(sc));
 448         i4bisppp_start(ifp);
 449 #endif
 450 }
 451 #endif /* I4BISPPPACCT */
 452
 453 /*
 454  *===========================================================================*
 455  *                      SyncPPP layer interface routines
 456  *===========================================================================*
 457  */
 458
 459 #if 0 /* never used ??? */
 460 /*---------------------------------------------------------------------------*
 461  *      just an alias for i4bisppp_tls, but of type timeout_t
 462  *---------------------------------------------------------------------------*/
 463 static void
 464 i4bisppp_timeout(void *cookie)
 465 {
 466         i4bisppp_tls((struct sppp *)cookie);
 467 }
 468 #endif
 469
 470 /*---------------------------------------------------------------------------*
 471  *      PPP this-layer-started action
 472  *---------------------------------------------------------------------------*
 473  */
 474 static void
 475 i4bisppp_tls(struct sppp *sp)
 476 {
 477         struct i4bisppp_softc *sc = (struct i4bisppp_softc *)sp;
 478         struct ifnet *ifp = (struct ifnet *)sp;
 479
 480         if(sc->sc_state == ST_CONNECTED)
 481                 return;
 482
 483         i4b_l4_dialout(BDRV_ISPPP, IFP2UNIT(ifp));
 484 }
 485
 486 /*---------------------------------------------------------------------------*
 487  *      PPP this-layer-finished action
 488  *---------------------------------------------------------------------------*
 489  */
 490 static void
 491 i4bisppp_tlf(struct sppp *sp)
 492 {
 493         struct i4bisppp_softc *sc = (struct i4bisppp_softc *)sp;
 494 /*      call_desc_t *cd = sc->sc_cdp;   */
 495         struct ifnet *ifp = (struct ifnet *)sp;
 496
 497         if(sc->sc_state != ST_CONNECTED)
 498                 return;
 499
 500 #if 0 /* never used ??? */
 501         UNTIMEOUT(i4bisppp_timeout, (void *)sp, sc->sc_ch);
 502 #endif
 503
 504         i4b_l4_drvrdisc(BDRV_ISPPP, IFP2UNIT(ifp));
 505 }
 506 /*---------------------------------------------------------------------------*
 507  *      PPP interface phase change
 508  *---------------------------------------------------------------------------*
 509  */
 510 static void
 511 i4bisppp_state_changed(struct sppp *sp, int new_state)
 512 {
 513         struct i4bisppp_softc *sc = (struct i4bisppp_softc *)sp;
 514
 515         i4b_l4_ifstate_changed(sc->sc_cdp, new_state);
 516 }
 517
 518 /*---------------------------------------------------------------------------*
 519  *      PPP control protocol negotiation complete (run ip-up script now)
 520  *---------------------------------------------------------------------------*
 521  */
 522 static void
 523 i4bisppp_negotiation_complete(struct sppp *sp)
 524 {
 525         struct i4bisppp_softc *sc = (struct i4bisppp_softc *)sp;
 526
 527         i4b_l4_negcomplete(sc->sc_cdp);
 528 }
 529
 530 /*===========================================================================*
 531  *                      ISDN INTERFACE ROUTINES
 532  *===========================================================================*/
 533
 534 /*---------------------------------------------------------------------------*
 535  *      this routine is called from L4 handler at connect time
 536  *---------------------------------------------------------------------------*/
 537 static void
 538 i4bisppp_connect(int unit, void *cdp)
 539 {
 540         struct i4bisppp_softc *sc = &i4bisppp_softc[unit];
 541         struct sppp *sp = &sc->sc_if_un.scu_sp;
 542         int s = splimp();
 543
 544         sc->sc_cdp = (call_desc_t *)cdp;
 545         sc->sc_state = ST_CONNECTED;
 546
 547 #if I4BISPPPACCT
 548         sc->sc_iinb = 0;
 549         sc->sc_ioutb = 0;
 550         sc->sc_inb = 0;
 551         sc->sc_outb = 0;
 552         sc->sc_linb = 0;
 553         sc->sc_loutb = 0;
 554         sc->sc_if.if_timer = I4BISPPPACCTINTVL;
 555 #endif
 556
 557 #if 0 /* never used ??? */
 558         UNTIMEOUT(i4bisppp_timeout, (void *)sp, sc->sc_ch);
 559 #endif
 560
 561         sp->pp_up(sp);          /* tell PPP we are ready */
 562 #ifndef __NetBSD__
 563         sp->pp_last_sent = sp->pp_last_recv = SECOND;
 564 #endif
 565         splx(s);
 566 }
 567
 568 /*---------------------------------------------------------------------------*
 569  *      this routine is called from L4 handler at disconnect time
 570  *---------------------------------------------------------------------------*/
 571 static void
 572 i4bisppp_disconnect(int unit, void *cdp)
 573 {
 574         call_desc_t *cd = (call_desc_t *)cdp;
 575         struct i4bisppp_softc *sc = &i4bisppp_softc[unit];
 576         struct sppp *sp = &sc->sc_if_un.scu_sp;
 577
 578         int s = splimp();
 579
 580         /* new stuff to check that the active channel is being closed */
 581         if (cd != sc->sc_cdp)
 582         {
 583                 NDBGL4(L4_ISPDBG, "isp%d, channel%d not active!", unit, cd->channelid);
 584                 splx(s);
 585                 return;
 586         }
 587
 588 #if I4BISPPPACCT
 589         sc->sc_if.if_timer = 0;
 590 #endif
 591
 592         i4b_l4_accounting(BDRV_ISPPP, unit, ACCT_FINAL,
 593                  sc->sc_ioutb, sc->sc_iinb, 0, 0, sc->sc_outb, sc->sc_inb);
 594
 595         if (sc->sc_state == ST_CONNECTED)
 596         {
 597 #if 0 /* never used ??? */
 598                 UNTIMEOUT(i4bisppp_timeout, (void *)sp, sc->sc_ch);
 599 #endif
 600                 sc->sc_cdp = (call_desc_t *)0;
 601                 /* do this here because pp_down calls i4bisppp_tlf */
 602                 sc->sc_state = ST_IDLE;
 603                 sp->pp_down(sp);        /* tell PPP we have hung up */
 604         }
 605
 606         splx(s);
 607 }
 608
 609 /*---------------------------------------------------------------------------*
 610  *      this routine is used to give a feedback from userland demon
 611  *      in case of dial problems
 612  *---------------------------------------------------------------------------*/
 613 static void
 614 i4bisppp_dialresponse(int unit, int status, cause_t cause)
 615 {
 616         struct i4bisppp_softc *sc = &i4bisppp_softc[unit];
 617         struct sppp *sp = &sc->sc_if_un.scu_sp;
 618
 619         NDBGL4(L4_ISPDBG, "isp%d: status=%d, cause=%d", unit, status, cause);
 620
 621         if(status != DSTAT_NONE)
 622         {
 623                 struct mbuf *m;
 624
 625                 NDBGL4(L4_ISPDBG, "isp%d: clearing queues", unit);
 626
 627                 if(!(sppp_isempty(&sc->sc_if)))
 628                 {
 629                         while((m = sppp_dequeue(&sc->sc_if)) != NULL)
 630                                 m_freem(m);
 631                 }
 632
 633                 sc->sc_cdp = (call_desc_t *)0;
 634                 /* do this here because pp_down calls i4bisppp_tlf */
 635                 sc->sc_state = ST_IDLE;
 636                 /*
 637                  * Ahh, sppp doesn't like to get a down event when
 638                  * dialing fails. So first tell it that we are up
 639                  * (doesn't hurt us since sc_state != ST_CONNECTED)
 640                  * and then go down.
 641                  */
 642                 sp->pp_up(sp);
 643                 sp->pp_down(sp);
 644         }
 645 }
 646
 647 /*---------------------------------------------------------------------------*
 648  *      interface up/down
 649  *---------------------------------------------------------------------------*/
 650 static void
 651 i4bisppp_updown(int unit, int updown)
 652 {
 653         /* could probably do something useful here */
 654 }
 655
 656 /*---------------------------------------------------------------------------*
 657  *      this routine is called from the HSCX interrupt handler
 658  *      when a new frame (mbuf) has been received and was put on
 659  *      the rx queue.
 660  *---------------------------------------------------------------------------*/
 661 static void
 662 i4bisppp_rx_data_rdy(int unit)
 663 {
 664         struct i4bisppp_softc *sc = &i4bisppp_softc[unit];
 665         struct mbuf *m;
 666         int s;
 667
 668         if((m = *isdn_linktab[unit]->rx_mbuf) == NULL)
 669                 return;
 670
 671         m->m_pkthdr.rcvif = &sc->sc_if;
 672         m->m_pkthdr.len = m->m_len;
 673
 674         microtime(&sc->sc_if.if_lastchange);
 675
 676         sc->sc_if.if_ipackets++;
 677 #if 0
 678         sc->sc_if.if_ibytes += m->m_pkthdr.len;
 679 #endif
 680
 681 #if I4BISPPPACCT
 682         sc->sc_inb += m->m_pkthdr.len;
 683 #endif
 684
 685 #ifdef I4BISPPPDEBUG
 686         printf("i4bisppp_rx_data_ready: received packet!\n");
 687 #endif
 688
 689 #if NBPFILTER > 0 || NBPF > 0
 690
 691 #ifdef __FreeBSD__
 692         if(sc->sc_if.if_bpf)
 693                 bpf_mtap(&sc->sc_if, m);
 694 #endif /* __FreeBSD__ */
 695
 696 #ifdef __NetBSD__
 697         if(sc->sc_if.if_bpf)
 698                 bpf_mtap(sc->sc_if.if_bpf, m);
 699 #endif
 700
 701 #endif /* NBPFILTER > 0  || NBPF > 0 */
 702
 703         s = splimp();
 704
 705         sppp_input(&sc->sc_if, m);
 706
 707         splx(s);
 708 }
 709
 710 /*---------------------------------------------------------------------------*
 711  *      this routine is called from the HSCX interrupt handler
 712  *      when the last frame has been sent out and there is no
 713  *      further frame (mbuf) in the tx queue.
 714  *---------------------------------------------------------------------------*/
 715 static void
 716 i4bisppp_tx_queue_empty(int unit)
 717 {
 718         i4bisppp_start(&i4bisppp_softc[unit].sc_if);
 719 }
 720
 721 /*---------------------------------------------------------------------------*
 722  *      THIS should be used instead of last_active_time to implement
 723  *      an activity timeout mechanism.
 724  *
 725  *      Sending back the time difference unneccessarily complicates the
 726  *      idletime checks in i4b_l4.c. Return the largest time instead.
 727  *      That way the code in i4b_l4.c needs only minimal changes.
 728  *---------------------------------------------------------------------------*/
 729 time_t
 730 i4bisppp_idletime(int unit)
 731 {
 732 #ifdef __NetBSD__
 733        return(i4bisppp_softc[unit].sc_cdp->last_active_time);
 734 #else
 735         struct sppp *sp;
 736         sp = (struct sppp *) &i4bisppp_softc[unit];
 737
 738         return((sp->pp_last_recv < sp->pp_last_sent) ?
 739                         sp->pp_last_sent : sp->pp_last_recv);
 740 #endif
 741 }
 742
 743 /*---------------------------------------------------------------------------*
 744  *      this routine is called from the HSCX interrupt handler
 745  *      each time a packet is received or transmitted. It should
 746  *      be used to implement an activity timeout mechanism.
 747  *---------------------------------------------------------------------------*/
 748 static void
 749 i4bisppp_activity(int unit, int rxtx)
 750 {
 751         i4bisppp_softc[unit].sc_cdp->last_active_time = SECOND;
 752 }
 753
 754 /*---------------------------------------------------------------------------*
 755  *      return this drivers linktab address
 756  *---------------------------------------------------------------------------*/
 757 drvr_link_t *
 758 i4bisppp_ret_linktab(int unit)
 759 {
 760         return(&i4bisppp_drvr_linktab[unit]);
 761 }
 762
 763 /*---------------------------------------------------------------------------*
 764  *      setup the isdn_linktab for this driver
 765  *---------------------------------------------------------------------------*/
 766 void
 767 i4bisppp_set_linktab(int unit, isdn_link_t *ilt)
 768 {
 769         isdn_linktab[unit] = ilt;
 770 }
 771
 772 /*---------------------------------------------------------------------------*
 773  *      initialize this drivers linktab
 774  *---------------------------------------------------------------------------*/
 775 static void
 776 i4bisppp_init_linktab(int unit)
 777 {
 778         i4bisppp_drvr_linktab[unit].unit = unit;
 779         i4bisppp_drvr_linktab[unit].bch_rx_data_ready = i4bisppp_rx_data_rdy;
 780         i4bisppp_drvr_linktab[unit].bch_tx_queue_empty = i4bisppp_tx_queue_empty;
 781         i4bisppp_drvr_linktab[unit].bch_activity = i4bisppp_activity;
 782         i4bisppp_drvr_linktab[unit].line_connected = i4bisppp_connect;
 783         i4bisppp_drvr_linktab[unit].line_disconnected = i4bisppp_disconnect;
 784         i4bisppp_drvr_linktab[unit].dial_response = i4bisppp_dialresponse;
 785         i4bisppp_drvr_linktab[unit].updown_ind = i4bisppp_updown;
 786 }
 787
 788 /*===========================================================================*/