sys/net/i4b/driver/i4b_bsdi_ibc.c

   1 /*
   2  *   Copyright (c) 1998, 1999 Bert Driehuis. All rights reserved.
   3  *
   4  *   Copyright (c) 1997, 1998 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_bsdi_ibc.c - isdn4bsd kernel BSD/OS point to point driver
  31  *      -------------------------------------------------------------
  32  *
  33  *      $Id: i4b_bsdi_ibc.c,v 1.3 2000/08/21 07:21:07 hm Exp $
  34  *
  35  * $FreeBSD: src/sys/i4b/driver/i4b_bsdi_ibc.c,v 1.3.2.1 2001/08/10 14:08:35 obrien Exp $
  36  * $DragonFly: src/sys/net/i4b/driver/Attic/i4b_bsdi_ibc.c,v 1.5 2004/01/06 03:17:25 dillon Exp $
  37  *
  38  *      last edit-date: [Tue Dec 14 21:55:24 1999]
  39  *
  40  *---------------------------------------------------------------------------*/
  41
  42 #include "ibc.h"
  43
  44 #if NIBC > 0
  45
  46 #include <sys/param.h>
  47 #include <sys/systm.h>
  48 #include <sys/mbuf.h>
  49 #include <sys/socket.h>
  50 #include <sys/errno.h>
  51 #include <sys/ioccom.h>
  52 #include <sys/ttycom.h>
  53 #include <sys/sockio.h>
  54 #include <sys/kernel.h>
  55 #include <sys/protosw.h>
  56
  57 #include <net/if.h>
  58 #include <net/if_types.h>
  59 #include <net/if_p2p.h>
  60 #include <net/netisr.h>
  61 #include <net/route.h>
  62
  63 #include <netinet/in.h>
  64 #include <netinet/in_systm.h>
  65 #include <netinet/in_var.h>
  66 #include <netinet/ip.h>
  67
  68 #include <net/i4b/include/machine/i4b_ioctl.h>
  69 #include <net/i4b/include/machine/i4b_cause.h>
  70 #include "../../include/i4b_global.h"
  71 #include "../../include/i4b_mbuf.h"
  72 #include "../../include/i4b_l3l4.h"
  73 #include "../../layer4/i4b_l4.h"
  74
  75 #define IFP2UNIT(ifp)   (ifp)->if_dunit
  76
  77 #define IOCTL_CMD_T u_long
  78
  79 void ibcattach(void *);
  80
  81 #define IBCACCT         1       /* enable accounting messages */
  82 #define IBCACCTINTVL    2       /* accounting msg interval in secs */
  83
  84 #define PPP_HDRLEN              4       /* 4 octets PPP header length   */
  85
  86 struct ibc_softc {
  87         struct p2pcom sc_p2pcom;
  88
  89         int     sc_state;       /* state of the interface       */
  90         call_desc_t *sc_cdp;    /* ptr to call descriptor       */
  91
  92 #ifdef IBCACCT
  93         int sc_iinb;            /* isdn driver # of inbytes     */
  94         int sc_ioutb;           /* isdn driver # of outbytes    */
  95         int sc_inb;             /* # of bytes rx'd              */
  96         int sc_outb;            /* # of bytes tx'd              */
  97         int sc_linb;            /* last # of bytes rx'd         */
  98         int sc_loutb;           /* last # of bytes tx'd         */
  99         int sc_fn;              /* flag, first null acct        */
 100 #endif
 101 } ibc_softc[NIBC];
 102
 103 static void     ibc_init_linktab(int unit);
 104
 105 static int      ibc_start(struct ifnet *ifp);
 106
 107 static int      ibc_watchdog(int unit);
 108 static int      ibc_mdmctl(struct p2pcom *pp, int flag);
 109 static int      ibc_getmdm(struct p2pcom *pp, caddr_t arg);
 110
 111 /* initialized by L4 */
 112
 113 static drvr_link_t ibc_drvr_linktab[NIBC];
 114 static isdn_link_t *isdn_ibc_lt[NIBC];
 115
 116 enum ibc_states {
 117         ST_IDLE,                        /* initialized, ready, idle     */
 118         ST_DIALING,                     /* dialling out to remote       */
 119         ST_CONNECTED,                   /* connected to remote          */
 120 };
 121
 122 int ibcdebug = 0;       /* Use bpatch to set this for debug printf's */
 123 #define DBG(x)  if (ibcdebug) printf x
 124
 125 /*===========================================================================*
 126  *                      DEVICE DRIVER ROUTINES
 127  *===========================================================================*/
 128
 129 /*---------------------------------------------------------------------------*
 130  *      interface attach routine at kernel boot time
 131  *---------------------------------------------------------------------------*/
 132 void
 133 ibcattach(void *dummy)
 134 {
 135         struct ibc_softc *sc = ibc_softc;
 136         struct ifnet *ifp;
 137         int i;
 138
 139 #ifndef HACK_NO_PSEUDO_ATTACH_MSG
 140         printf("ibc: %d ISDN ibc device(s) attached\n",
 141                NIBC);
 142 #endif
 143
 144         for(i = 0; i < NIBC; sc++, i++) {
 145                 ibc_init_linktab(i);
 146
 147                 sc->sc_p2pcom.p2p_mdmctl = ibc_mdmctl;
 148                 sc->sc_p2pcom.p2p_getmdm = ibc_getmdm;
 149                 sc->sc_state = ST_IDLE;
 150                 ifp = &sc->sc_p2pcom.p2p_if;
 151                 if_initname(ifp, "ibc", i);
 152                 ifp->if_next = NULL;
 153                 ifp->if_mtu = 1500 /*XXX*/;
 154                 ifp->if_baudrate = 64000;
 155                 ifp->if_flags = IFF_SIMPLEX | IFF_POINTOPOINT;
 156                 ifp->if_type = IFT_ISDNBASIC;
 157                 ifp->if_start = ibc_start;
 158                 ifp->if_output = 0;
 159                 ifp->if_ioctl = p2p_ioctl;
 160
 161                 ifp->if_hdrlen = 0;
 162                 ifp->if_addrlen = 0;
 163                 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
 164
 165                 ifp->if_ipackets = 0;
 166                 ifp->if_ierrors = 0;
 167                 ifp->if_opackets = 0;
 168                 ifp->if_oerrors = 0;
 169                 ifp->if_collisions = 0;
 170                 ifp->if_ibytes = 0;
 171                 ifp->if_obytes = 0;
 172                 ifp->if_imcasts = 0;
 173                 ifp->if_omcasts = 0;
 174                 ifp->if_iqdrops = 0;
 175                 ifp->if_noproto = 0;
 176 #if IBCACCT
 177                 ifp->if_timer = 0;
 178                 ifp->if_watchdog = ibc_watchdog;
 179                 sc->sc_iinb = 0;
 180                 sc->sc_ioutb = 0;
 181                 sc->sc_inb = 0;
 182                 sc->sc_outb = 0;
 183                 sc->sc_linb = 0;
 184                 sc->sc_loutb = 0;
 185                 sc->sc_fn = 1;
 186 #endif
 187 #if defined(__FreeBSD_version) && ((__FreeBSD_version >= 500009) || (410000 <= __FreeBSD_version && __FreeBSD_version < 500000))
 188                 ether_ifattach(ifp, 0);
 189 #else
 190                 if_attach(ifp);
 191 #endif
 192                 p2p_attach(&sc->sc_p2pcom);
 193         }
 194 }
 195
 196 static struct mbuf *
 197 p2p_dequeue(struct p2pcom *pp)
 198 {
 199         struct mbuf *m;
 200
 201         IF_DEQUEUE(&pp->p2p_isnd, m);
 202         if (m == 0)
 203                 IF_DEQUEUE(&pp->p2p_if.if_snd, m);
 204         return m;
 205 }
 206
 207 /*---------------------------------------------------------------------------*
 208  *      start output to ISDN B-channel
 209  *---------------------------------------------------------------------------*/
 210 static int
 211 ibc_start(struct ifnet *ifp)
 212 {
 213         int unit = IFP2UNIT(ifp);
 214         struct ibc_softc *sc = (struct ibc_softc *)&ibc_softc[unit];
 215         struct p2pcom *pp = &sc->sc_p2pcom;
 216         struct mbuf *m;
 217         int s;
 218
 219         if(sc->sc_state != ST_CONNECTED) {
 220                 DBG(("ibc%d: ibc_start called with sc_state=%d\n",
 221                         unit, sc->sc_state));
 222                 return 0;
 223         }
 224
 225         s = SPLI4B();
 226
 227         IF_LOCK(isdn_ibc_lt[unit]->tx_queue);
 228         if (_IF_QFULL(isdn_ibc_lt[unit]->tx_queue)) {
 229                 IF_UNLOCK(isdn_ibc_lt[unit]->tx_queue);
 230                 splx(s);
 231                 return 0;
 232         }
 233
 234         m = p2p_dequeue(pp);
 235         if (m == NULL) {
 236                 IF_UNLOCK(isdn_ibc_lt[unit]->tx_queue);
 237                 splx(s);
 238                 return 0;
 239         }
 240
 241         do {
 242                 microtime(&ifp->if_lastchange);
 243
 244                 ifp->if_obytes += m->m_pkthdr.len;
 245                 sc->sc_outb += m->m_pkthdr.len;
 246                 _IF_ENQUEUE(isdn_ibc_lt[unit]->tx_queue, m);
 247
 248                 ifp->if_opackets++;
 249         } while (!_IF_QFULL(isdn_ibc_lt[unit]->tx_queue) &&
 250                                         (m = p2p_dequeue(pp)) != NULL);
 251         IF_UNLOCK(isdn_ibc_lt[unit]->tx_queue);
 252         isdn_ibc_lt[unit]->bch_tx_start(isdn_ibc_lt[unit]->unit,
 253                                          isdn_ibc_lt[unit]->channel);
 254         splx(s);
 255         return 0;
 256 }
 257
 258 #ifdef IBCACCT
 259 /*---------------------------------------------------------------------------*
 260  *      watchdog routine
 261  *---------------------------------------------------------------------------*/
 262 static int
 263 ibc_watchdog(int unit)
 264 {
 265         struct ibc_softc *sc = &ibc_softc[unit];
 266         struct ifnet *ifp = &sc->sc_p2pcom.p2p_if;
 267         bchan_statistics_t bs;
 268
 269         (*isdn_ibc_lt[unit]->bch_stat)
 270                 (isdn_ibc_lt[unit]->unit, isdn_ibc_lt[unit]->channel, &bs);
 271
 272         sc->sc_ioutb += bs.outbytes;
 273         sc->sc_iinb += bs.inbytes;
 274
 275         if((sc->sc_iinb != sc->sc_linb) || (sc->sc_ioutb != sc->sc_loutb) || sc->sc_fn)
 276         {
 277                 int ri = (sc->sc_iinb - sc->sc_linb)/IBCACCTINTVL;
 278                 int ro = (sc->sc_ioutb - sc->sc_loutb)/IBCACCTINTVL;
 279
 280                 if((sc->sc_iinb == sc->sc_linb) && (sc->sc_ioutb == sc->sc_loutb))
 281                         sc->sc_fn = 0;
 282                 else
 283                         sc->sc_fn = 1;
 284
 285                 sc->sc_linb = sc->sc_iinb;
 286                 sc->sc_loutb = sc->sc_ioutb;
 287
 288                 i4b_l4_accounting(BDRV_IBC, unit, ACCT_DURING,
 289                          sc->sc_ioutb, sc->sc_iinb, ro, ri, sc->sc_outb, sc->sc_inb);
 290         }
 291         ifp->if_timer = IBCACCTINTVL;
 292         return 0;
 293 }
 294 #endif /* IBCACCT */
 295
 296 /*
 297  *===========================================================================*
 298  *                      P2P layer interface routines
 299  *===========================================================================*
 300  */
 301
 302 #if 0
 303 /*---------------------------------------------------------------------------*
 304  *      PPP interface phase change
 305  *---------------------------------------------------------------------------*
 306  */
 307 static void
 308 ibc_state_changed(struct sppp *sp, int new_state)
 309 {
 310         struct ibc_softc *sc = (struct ibc_softc *)sp;
 311
 312         i4b_l4_ifstate_changed(sc->sc_cdp, new_state);
 313 }
 314
 315 /*---------------------------------------------------------------------------*
 316  *      PPP control protocol negotiation complete (run ip-up script now)
 317  *---------------------------------------------------------------------------*
 318  */
 319 static void
 320 ibc_negotiation_complete(struct sppp *sp)
 321 {
 322         struct ibc_softc *sc = (struct ibc_softc *)sp;
 323
 324         i4b_l4_negcomplete(sc->sc_cdp);
 325 }
 326 #endif
 327
 328 /*===========================================================================*
 329  *                      ISDN INTERFACE ROUTINES
 330  *===========================================================================*/
 331
 332 /*---------------------------------------------------------------------------*
 333  *      this routine is called from L4 handler at connect time
 334  *---------------------------------------------------------------------------*/
 335 static void
 336 ibc_connect(int unit, void *cdp)
 337 {
 338         struct ibc_softc *sc = &ibc_softc[unit];
 339         struct ifnet *ifp = &sc->sc_p2pcom.p2p_if;
 340         int s;
 341
 342         DBG(("ibc%d: ibc_connect\n", unit));
 343
 344         s = splimp();
 345
 346         sc->sc_cdp = (call_desc_t *)cdp;
 347         sc->sc_state = ST_CONNECTED;
 348
 349 #if IBCACCT
 350         sc->sc_iinb = 0;
 351         sc->sc_ioutb = 0;
 352         sc->sc_inb = 0;
 353         sc->sc_outb = 0;
 354         sc->sc_linb = 0;
 355         sc->sc_loutb = 0;
 356         ifp->if_timer = IBCACCTINTVL;
 357 #endif
 358
 359         splx(s);
 360         if (sc->sc_p2pcom.p2p_modem)
 361                 (*sc->sc_p2pcom.p2p_modem)(&sc->sc_p2pcom, 1);
 362
 363                 /* This is a lie... PPP is just starting to negociate :-) */
 364         i4b_l4_negcomplete(sc->sc_cdp);
 365 }
 366
 367 /*---------------------------------------------------------------------------*
 368  *      this routine is called from L4 handler at disconnect time
 369  *---------------------------------------------------------------------------*/
 370 static void
 371 ibc_disconnect(int unit, void *cdp)
 372 {
 373         call_desc_t *cd = (call_desc_t *)cdp;
 374         struct ibc_softc *sc = &ibc_softc[unit];
 375         struct ifnet *ifp = &sc->sc_p2pcom.p2p_if;
 376         int s;
 377
 378         DBG(("ibc%d: ibc_disconnect\n", unit));
 379
 380         s = splimp();
 381
 382         /* new stuff to check that the active channel is being closed */
 383         if (cd != sc->sc_cdp)
 384         {
 385                 DBG(("ibc_disconnect: ibc%d channel%d not active\n",
 386                         cd->driver_unit, cd->channelid));
 387                 splx(s);
 388                 return;
 389         }
 390
 391 #if IBCACCT
 392         ifp->if_timer = 0;
 393 #endif
 394
 395         i4b_l4_accounting(BDRV_IBC, unit, ACCT_FINAL,
 396                  sc->sc_ioutb, sc->sc_iinb, 0, 0, sc->sc_outb, sc->sc_inb);
 397
 398         if (sc->sc_state == ST_CONNECTED)
 399         {
 400                 sc->sc_cdp = (call_desc_t *)0;
 401                 sc->sc_state = ST_IDLE;
 402                 if (sc->sc_p2pcom.p2p_modem)
 403                         (*sc->sc_p2pcom.p2p_modem)(&sc->sc_p2pcom, 0);
 404         }
 405
 406         splx(s);
 407 }
 408
 409 /*---------------------------------------------------------------------------*
 410  *      this routine is used to give a feedback from userland demon
 411  *      in case of dial problems
 412  *---------------------------------------------------------------------------*/
 413 static void
 414 ibc_dialresponse(int unit, int status)
 415 {
 416         DBG(("ibc%d: ibc_dialresponse %d\n", unit, status));
 417 /*      struct ibc_softc *sc = &ibc_softc[unit];        */
 418 }
 419
 420 /*---------------------------------------------------------------------------*
 421  *      interface up/down
 422  *---------------------------------------------------------------------------*/
 423 static void
 424 ibc_updown(int unit, int updown)
 425 {
 426         DBG(("ibc%d: ibc_updown %d\n", unit, updown));
 427         /* could probably do something useful here */
 428 }
 429
 430 /*---------------------------------------------------------------------------*
 431  *      this routine is called from the HSCX interrupt handler
 432  *      when a new frame (mbuf) has been received and was put on
 433  *      the rx queue.
 434  *---------------------------------------------------------------------------*/
 435 static void
 436 ibc_rx_data_rdy(int unit)
 437 {
 438         struct ibc_softc *sc = &ibc_softc[unit];
 439         struct ifnet *ifp = &sc->sc_p2pcom.p2p_if;
 440         struct mbuf *m, *m0;
 441         char *buf;
 442         int s;
 443
 444         if((m = *isdn_ibc_lt[unit]->rx_mbuf) == NULL)
 445                 return;
 446
 447         microtime(&ifp->if_lastchange);
 448         ifp->if_ipackets++;
 449
 450                 /* Walk the mbuf chain */
 451         s = splimp();
 452         for (m0 = m; m != 0; m = m->m_next) {
 453                 if (m->m_len == 0)
 454                         continue;
 455                 ifp->if_ibytes += m->m_len;
 456 #if IBCACCT
 457                 sc->sc_inb += m->m_len;
 458 #endif
 459                 buf = mtod(m, caddr_t);
 460                 if ((*sc->sc_p2pcom.p2p_hdrinput)(
 461                                         &sc->sc_p2pcom, buf, m->m_len) >= 0)
 462                         (*sc->sc_p2pcom.p2p_input)(&sc->sc_p2pcom, 0);
 463         }
 464         splx(s);
 465         m_freem(m0);
 466 }
 467
 468 /*---------------------------------------------------------------------------*
 469  *      this routine is called from the HSCX interrupt handler
 470  *      when the last frame has been sent out and there is no
 471  *      further frame (mbuf) in the tx queue.
 472  *---------------------------------------------------------------------------*/
 473 static void
 474 ibc_tx_queue_empty(int unit)
 475 {
 476         ibc_start(&ibc_softc[unit].sc_p2pcom.p2p_if);
 477 }
 478
 479 /*---------------------------------------------------------------------------*
 480  *      this routine is called from the HSCX interrupt handler
 481  *      each time a packet is received or transmitted. It should
 482  *      be used to implement an activity timeout mechanism.
 483  *---------------------------------------------------------------------------*/
 484 static void
 485 ibc_activity(int unit, int rxtx)
 486 {
 487         ibc_softc[unit].sc_cdp->last_active_time = SECOND;
 488 }
 489
 490 /*---------------------------------------------------------------------------*
 491  *      return this drivers linktab address
 492  *---------------------------------------------------------------------------*/
 493 drvr_link_t *
 494 ibc_ret_linktab(int unit)
 495 {
 496         return(&ibc_drvr_linktab[unit]);
 497 }
 498
 499 /*---------------------------------------------------------------------------*
 500  *      setup the isdn_ibc_lt for this driver
 501  *---------------------------------------------------------------------------*/
 502 void
 503 ibc_set_linktab(int unit, isdn_link_t *ilt)
 504 {
 505         isdn_ibc_lt[unit] = ilt;
 506 }
 507
 508 /*---------------------------------------------------------------------------*
 509  *      initialize this drivers linktab
 510  *---------------------------------------------------------------------------*/
 511 static void
 512 ibc_init_linktab(int unit)
 513 {
 514         ibc_drvr_linktab[unit].unit = unit;
 515         ibc_drvr_linktab[unit].bch_rx_data_ready = ibc_rx_data_rdy;
 516         ibc_drvr_linktab[unit].bch_tx_queue_empty = ibc_tx_queue_empty;
 517         ibc_drvr_linktab[unit].bch_activity = ibc_activity;
 518         ibc_drvr_linktab[unit].line_connected = ibc_connect;
 519         ibc_drvr_linktab[unit].line_disconnected = ibc_disconnect;
 520         ibc_drvr_linktab[unit].dial_response = ibc_dialresponse;
 521         ibc_drvr_linktab[unit].updown_ind = ibc_updown;
 522 }
 523
 524 /*===========================================================================*/
 525
 526 static int
 527 ibc_mdmctl(pp, flag)
 528         struct p2pcom *pp;
 529         int flag;
 530 {
 531         struct ifnet *ifp = &pp->p2p_if;
 532         struct ibc_softc *sc = (struct ibc_softc *)&ibc_softc[ifp->if_dunit];
 533
 534         DBG(("ibc%d: ibc_mdmctl called flags=%d\n", IFP2UNIT(ifp), flag));
 535
 536         if (flag == 1 && sc->sc_state == ST_IDLE) {
 537                 sc->sc_state = ST_DIALING;
 538                 i4b_l4_dialout(BDRV_IBC, IFP2UNIT(ifp));
 539         } else if (flag == 0 && sc->sc_state != ST_IDLE) {
 540                 sc->sc_state = ST_IDLE;
 541                 i4b_l4_drvrdisc(BDRV_IBC, IFP2UNIT(ifp));
 542         }
 543         return 0;
 544 }
 545
 546 static int
 547 ibc_getmdm(pp, arg)
 548         struct p2pcom *pp;
 549         caddr_t arg;
 550 {
 551         struct ifnet *ifp = &pp->p2p_if;
 552         struct ibc_softc *sc = (struct ibc_softc *)&ibc_softc[ifp->if_dunit];
 553
 554         if (sc->sc_state == ST_CONNECTED)
 555                 *(int *)arg = TIOCM_CAR;
 556         else
 557                 *(int *)arg = 0;
 558         return 0;
 559
 560         DBG(("ibc%d: ibc_getmdm called ret=%d\n", IFP2UNIT(ifp), *(int *)arg));
 561 }
 562 #endif