sys/net/i4b/driver/i4b_ipr.c

   1 /*
   2  * Copyright (c) 1997, 2001 Hellmuth Michaelis. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  23  * SUCH DAMAGE.
  24  *
  25  *---------------------------------------------------------------------------
  26  *
  27  *      i4b_ipr.c - isdn4bsd IP over raw HDLC ISDN network driver
  28  *      ---------------------------------------------------------
  29  *
  30  * $FreeBSD: src/sys/i4b/driver/i4b_ipr.c,v 1.8.2.3 2001/10/27 15:48:17 hm Exp $
  31  * $DragonFly: src/sys/net/i4b/driver/i4b_ipr.c,v 1.17 2005/06/14 21:19:18 joerg Exp $
  32  *
  33  *      last edit-date: [Fri Oct 26 19:32:38 2001]
  34  *
  35  *---------------------------------------------------------------------------*
  36  *
  37  *      statistics counter usage (interface lifetime):
  38  *      ----------------------------------------------
  39  *      sc->sc_if.if_ipackets   # of received packets
  40  *      sc->sc_if.if_ierrors    # of error packets not going to upper layers
  41  *      sc->sc_if.if_opackets   # of transmitted packets
  42  *      sc->sc_if.if_oerrors    # of error packets not being transmitted
  43  *      sc->sc_if.if_collisions # of invalid ip packets after VJ decompression
  44  *      sc->sc_if.if_ibytes     # of bytes coming in from the line (before VJ)
  45  *      sc->sc_if.if_obytes     # of bytes going out to the line (after VJ)
  46  *      sc->sc_if.if_imcasts      (currently unused)
  47  *      sc->sc_if.if_omcasts    # of frames sent out of the fastqueue
  48  *      sc->sc_if.if_iqdrops    # of frames dropped on input because queue full
  49  *      sc->sc_if.if_noproto    # of frames dropped on output because !AF_INET
  50  *
  51  *      statistics counter usage (connection lifetime):
  52  *      -----------------------------------------------
  53  *      sc->sc_iinb             # of ISDN incoming bytes from HSCX
  54  *      sc->sc_ioutb            # of ISDN outgoing bytes from HSCX
  55  *      sc->sc_inb              # of incoming bytes after decompression
  56  *      sc->sc_outb             # of outgoing bytes before compression
  57  *
  58  *---------------------------------------------------------------------------*/
  59
  60 #include "use_i4bipr.h"
  61
  62 #if NI4BIPR > 0
  63
  64 #include "opt_i4b.h"
  65
  66 #include <sys/param.h>
  67 #include <sys/systm.h>
  68 #include <sys/mbuf.h>
  69 #include <sys/socket.h>
  70 #include <sys/errno.h>
  71
  72 #include <sys/ioccom.h>
  73 #include <sys/sockio.h>
  74 #ifdef IPR_VJ
  75 #include <sys/malloc.h>
  76 #endif
  77
  78 #include <sys/kernel.h>
  79 #include <sys/thread2.h>
  80
  81 #include <net/if.h>
  82 #include <net/if_types.h>
  83 #include <net/netisr.h>
  84
  85 #include <netinet/in.h>
  86 #include <netinet/in_systm.h>
  87 #include <netinet/in_var.h>
  88 #include <netinet/ip.h>
  89
  90 #ifdef IPR_VJ
  91 #include <net/slcompress.h>
  92 #define IPR_COMPRESS IFF_LINK0  /* compress TCP traffic */
  93 #define IPR_AUTOCOMP IFF_LINK1  /* auto-enable TCP compression */
  94
  95 /*---------------------------------------------------------------------------
  96  * NOTICE: using NO separate buffer relies on the assumption, that the HSCX
  97  * IRQ handler _always_ allocates a single, continuous mbuf cluster large
  98  * enough to hold the maximum MTU size if the ipr interface !
  99  *
 100  * CAUTION: i have re-defined IPR_VJ_USEBUFFER because it makes problems
 101  *          with 2 i4b's back to back running cvs over ssh, cvs simply
 102  *          aborts because it gets bad data. Everything else (telnet/ftp?etc)
 103  *          functions fine.
 104  *---------------------------------------------------------------------------*/
 105 #define IPR_VJ_USEBUFFER        /* define to use an allocated separate buffer*/
 106                                 /* undef to uncompress in the mbuf itself    */
 107 #endif /* IPR_VJ */
 108
 109 #include "use_bpf.h"
 110
 111 #if NBPFILTER > 0 || NBPF > 0
 112 #include <sys/time.h>
 113 #include <net/bpf.h>
 114 #endif
 115
 116 #include <net/i4b/include/machine/i4b_debug.h>
 117 #include <net/i4b/include/machine/i4b_ioctl.h>
 118
 119 #include "../include/i4b_global.h"
 120 #include "../include/i4b_l3l4.h"
 121
 122 #include "../layer4/i4b_l4.h"
 123
 124 #define IPR_FMT "%s: "
 125 #define IPR_ARG(sc)     ((sc)->sc_if.if_xname)
 126 #define PDEVSTATIC      /* not static */
 127
 128 #define I4BIPRMTU       1500            /* regular MTU */
 129 #define I4BIPRMAXMTU    2000            /* max MTU */
 130 #define I4BIPRMINMTU    500             /* min MTU */
 131
 132 #define I4BIPRMAXQLEN   50              /* max queue length */
 133
 134 #define I4BIPRACCT      1               /* enable accounting messages */
 135 #define I4BIPRACCTINTVL 2               /* accounting msg interval in secs */
 136 #define I4BIPRADJFRXP   1               /* adjust 1st rxd packet */
 137
 138 /* initialized by L4 */
 139
 140 static drvr_link_t ipr_drvr_linktab[NI4BIPR];
 141 static isdn_link_t *isdn_linktab[NI4BIPR];
 142
 143 struct ipr_softc {
 144         struct ifnet    sc_if;          /* network-visible interface    */
 145         int             sc_state;       /* state of the interface       */
 146         int             sc_unit;        /* unit number                  */
 147         call_desc_t     *sc_cdp;        /* ptr to call descriptor       */
 148         int             sc_updown;      /* soft state of interface      */
 149         struct ifqueue  sc_fastq;       /* interactive traffic          */
 150         int             sc_dialresp;    /* dialresponse                 */
 151         int             sc_lastdialresp;/* last dialresponse            */
 152
 153 #if I4BIPRACCT
 154         int             sc_iinb;        /* isdn driver # of inbytes     */
 155         int             sc_ioutb;       /* isdn driver # of outbytes    */
 156         int             sc_inb;         /* # of bytes rx'd              */
 157         int             sc_outb;        /* # of bytes tx'd              */
 158         int             sc_linb;        /* last # of bytes rx'd         */
 159         int             sc_loutb;       /* last # of bytes tx'd         */
 160         int             sc_fn;          /* flag, first null acct        */
 161 #endif
 162
 163         struct callout  sc_timeout;
 164
 165 #ifdef I4BIPRADJFRXP
 166         int             sc_first_pkt;   /* flag, first rxd packet       */
 167 #endif
 168 #if IPR_LOG
 169         int             sc_log_first;   /* log first n packets          */
 170 #endif
 171
 172 #ifdef IPR_VJ
 173         struct slcompress sc_compr;     /* tcp compression data         */
 174 #ifdef IPR_VJ_USEBUFFER
 175         u_char          *sc_cbuf;       /* tcp decompression buffer     */
 176 #endif
 177 #endif
 178
 179 } ipr_softc[NI4BIPR];
 180
 181 enum ipr_states {
 182         ST_IDLE,                        /* initialized, ready, idle     */
 183         ST_DIALING,                     /* dialling out to remote       */
 184         ST_CONNECTED_W,                 /* connected to remote          */
 185         ST_CONNECTED_A,                 /* connected to remote          */
 186 };
 187
 188 #define THE_UNIT        sc->sc_unit
 189
 190 #  define IOCTL_CMD_T u_long
 191
 192 PDEVSTATIC void i4biprattach(void *);
 193 PSEUDO_SET(i4biprattach, i4b_ipr);
 194 static int i4biprioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, caddr_t data,
 195                        struct ucred *cr);
 196 static void iprwatchdog(struct ifnet *ifp);
 197 static void ipr_init_linktab(int unit);
 198 static void ipr_tx_queue_empty(int unit);
 199 static int i4biproutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, struct rtentry *rtp);
 200 static void iprclearqueues(struct ipr_softc *sc);
 201
 202 /*===========================================================================*
 203  *                      DEVICE DRIVER ROUTINES
 204  *===========================================================================*/
 205
 206 /*---------------------------------------------------------------------------*
 207  *      interface attach routine at kernel boot time
 208  *---------------------------------------------------------------------------*/
 209 PDEVSTATIC void
 210 i4biprattach(void *dummy)
 211 {
 212         struct ipr_softc *sc = ipr_softc;
 213         int i;
 214
 215 #ifdef IPR_VJ
 216         printf("i4bipr: %d IP over raw HDLC ISDN device(s) attached (VJ header compression)\n", NI4BIPR);
 217 #else
 218         printf("i4bipr: %d IP over raw HDLC ISDN device(s) attached\n", NI4BIPR);
 219 #endif
 220
 221         for(i=0; i < NI4BIPR; sc++, i++)
 222         {
 223                 ipr_init_linktab(i);
 224
 225                 NDBGL4(L4_DIALST, "setting dial state to ST_IDLE");
 226
 227                 sc->sc_state = ST_IDLE;
 228
 229                 if_initname(&(sc->sc_if), "ipr", i);
 230
 231 #ifdef  IPR_VJ
 232                 sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_SIMPLEX | IPR_AUTOCOMP;
 233 #else
 234                 sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_SIMPLEX;
 235 #endif
 236
 237                 callout_init(&sc->sc_timeout);
 238
 239                 sc->sc_if.if_mtu = I4BIPRMTU;
 240                 sc->sc_if.if_type = IFT_ISDNBASIC;
 241                 sc->sc_if.if_ioctl = i4biprioctl;
 242                 sc->sc_if.if_output = i4biproutput;
 243
 244                 sc->sc_if.if_snd.ifq_maxlen = I4BIPRMAXQLEN;
 245                 sc->sc_fastq.ifq_maxlen = I4BIPRMAXQLEN;
 246
 247                 sc->sc_if.if_ipackets = 0;
 248                 sc->sc_if.if_ierrors = 0;
 249                 sc->sc_if.if_opackets = 0;
 250                 sc->sc_if.if_oerrors = 0;
 251                 sc->sc_if.if_collisions = 0;
 252                 sc->sc_if.if_ibytes = 0;
 253                 sc->sc_if.if_obytes = 0;
 254                 sc->sc_if.if_imcasts = 0;
 255                 sc->sc_if.if_omcasts = 0;
 256                 sc->sc_if.if_iqdrops = 0;
 257                 sc->sc_if.if_noproto = 0;
 258
 259 #if I4BIPRACCT
 260                 sc->sc_if.if_timer = 0;
 261                 sc->sc_if.if_watchdog = iprwatchdog;
 262                 sc->sc_iinb = 0;
 263                 sc->sc_ioutb = 0;
 264                 sc->sc_inb = 0;
 265                 sc->sc_outb = 0;
 266                 sc->sc_linb = 0;
 267                 sc->sc_loutb = 0;
 268                 sc->sc_fn = 1;
 269 #endif
 270 #if IPR_LOG
 271                 sc->sc_log_first = IPR_LOG;
 272 #endif
 273
 274 #ifdef  IPR_VJ
 275                 sl_compress_init(&sc->sc_compr, -1);
 276
 277 #ifdef IPR_VJ_USEBUFFER
 278                 if(!((sc->sc_cbuf =
 279                    (u_char *)malloc(I4BIPRMAXMTU+128, M_DEVBUF, M_WAITOK))))
 280                 {
 281                         panic("if_ipr.c, ipr_attach: VJ malloc failed");
 282                 }
 283 #endif
 284 #endif
 285                 sc->sc_updown = SOFT_ENA;       /* soft enabled */
 286                 sc->sc_dialresp = DSTAT_NONE;   /* no response */
 287                 sc->sc_lastdialresp = DSTAT_NONE;
 288
 289                 if_attach(&sc->sc_if);
 290                 bpfattach(&sc->sc_if, DLT_NULL, sizeof(u_int));
 291         }
 292 }
 293
 294 /*---------------------------------------------------------------------------*
 295  *      output a packet to the ISDN B-channel
 296  *---------------------------------------------------------------------------*/
 297 static int
 298 i4biproutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
 299          struct rtentry *rtp)
 300 {
 301         struct ipr_softc *sc;
 302         int unit;
 303         struct ip *ip;
 304
 305         crit_enter();
 306
 307         sc = ifp->if_softc;
 308         unit = sc->sc_unit;
 309
 310         /* check for IP */
 311
 312         if(dst->sa_family != AF_INET)
 313         {
 314                 printf(IPR_FMT "af%d not supported\n", IPR_ARG(sc), dst->sa_family);
 315                 m_freem(m);
 316                 crit_exit();
 317                 sc->sc_if.if_noproto++;
 318                 sc->sc_if.if_oerrors++;
 319                 return(EAFNOSUPPORT);
 320         }
 321
 322         /* check interface state = UP */
 323
 324         if(!(ifp->if_flags & IFF_UP))
 325         {
 326                 NDBGL4(L4_IPRDBG, "ipr%d: interface is DOWN!", unit);
 327                 m_freem(m);
 328                 crit_exit();
 329                 sc->sc_if.if_oerrors++;
 330                 return(ENETDOWN);
 331         }
 332
 333         /* dial if necessary */
 334
 335         if(sc->sc_state == ST_IDLE || sc->sc_state == ST_DIALING)
 336         {
 337
 338 #ifdef NOTDEF
 339                 switch(sc->sc_dialresp)
 340                 {
 341                         case DSTAT_TFAIL:       /* transient failure */
 342                                 NDBGL4(L4_IPRDBG, "ipr%d: transient dial failure!", unit);
 343                                 m_freem(m);
 344                                 iprclearqueues(sc);
 345                                 sc->sc_dialresp = DSTAT_NONE;
 346                                 crit_exit();
 347                                 sc->sc_if.if_oerrors++;
 348                                 return(ENETUNREACH);
 349                                 break;
 350
 351                         case DSTAT_PFAIL:       /* permanent failure */
 352                                 NDBGL4(L4_IPRDBG, "ipr%d: permanent dial failure!", unit);
 353                                 m_freem(m);
 354                                 iprclearqueues(sc);
 355                                 sc->sc_dialresp = DSTAT_NONE;
 356                                 crit_exit();
 357                                 sc->sc_if.if_oerrors++;
 358                                 return(EHOSTUNREACH);
 359                                 break;
 360
 361                         case DSTAT_INONLY:      /* no dialout allowed*/
 362                                 NDBGL4(L4_IPRDBG, "ipr%d: dialout not allowed failure!", unit);
 363                                 m_freem(m);
 364                                 iprclearqueues(sc);
 365                                 sc->sc_dialresp = DSTAT_NONE;
 366                                 crit_exit();
 367                                 sc->sc_if.if_oerrors++;
 368                                 return(EHOSTUNREACH);
 369                                 break;
 370                 }
 371 #endif
 372
 373                 NDBGL4(L4_IPRDBG, "ipr%d: send dial request message!", unit);
 374                 NDBGL4(L4_DIALST, "ipr%d: setting dial state to ST_DIALING", unit);
 375                 i4b_l4_dialout(BDRV_IPR, unit);
 376                 sc->sc_state = ST_DIALING;
 377         }
 378
 379 #if IPR_LOG
 380         if(sc->sc_log_first > 0)
 381         {
 382                 --(sc->sc_log_first);
 383                 i4b_l4_packet_ind(BDRV_IPR, unit, 1, m );
 384         }
 385 #endif
 386
 387         /* update access time */
 388
 389         microtime(&sc->sc_if.if_lastchange);
 390
 391         /*
 392          * check, if type of service indicates interactive, i.e. telnet,
 393          * traffic. in case it is interactive, put it into the fast queue,
 394          * else (i.e. ftp traffic) put it into the "normal" queue
 395          */
 396
 397         ip = mtod(m, struct ip *);              /* get ptr to ip header */
 398
 399         /* check for space in choosen send queue */
 400
 401         if (netisr_queue(NETISR_IP, m))
 402         {
 403                 NDBGL4(L4_IPRDBG, "ipr%d: send queue full!", unit);
 404                 crit_exit();
 405                 sc->sc_if.if_oerrors++;
 406                 return(ENOBUFS);
 407         }
 408
 409         NDBGL4(L4_IPRDBG, "ipr%d: add packet to send queue!", unit);
 410
 411         ipr_tx_queue_empty(unit);
 412
 413         crit_exit();
 414
 415         return (0);
 416 }
 417
 418 /*---------------------------------------------------------------------------*
 419  *      process ioctl
 420  *---------------------------------------------------------------------------*/
 421 static int
 422 i4biprioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, caddr_t data, struct ucred *cr)
 423 {
 424         struct ipr_softc *sc = ifp->if_softc;
 425
 426         struct ifreq *ifr = (struct ifreq *)data;
 427         struct ifaddr *ifa = (struct ifaddr *)data;
 428         int error = 0;
 429
 430         crit_enter();
 431
 432         switch (cmd)
 433         {
 434                 case SIOCAIFADDR:       /* add interface address */
 435                 case SIOCSIFADDR:       /* set interface address */
 436                 case SIOCSIFDSTADDR:    /* set interface destination address */
 437                         if(ifa->ifa_addr->sa_family != AF_INET)
 438                                 error = EAFNOSUPPORT;
 439                         else
 440                                 sc->sc_if.if_flags |= IFF_UP;
 441                         microtime(&sc->sc_if.if_lastchange);
 442                         break;
 443
 444                 case SIOCSIFFLAGS:      /* set interface flags */
 445                         if(!(ifr->ifr_flags & IFF_UP))
 446                         {
 447                                 if(sc->sc_if.if_flags & IFF_RUNNING)
 448                                 {
 449                                         /* disconnect ISDN line */
 450                                         i4b_l4_drvrdisc(BDRV_IPR, sc->sc_unit);
 451                                         sc->sc_if.if_flags &= ~IFF_RUNNING;
 452                                 }
 453
 454                                 sc->sc_state = ST_IDLE;
 455
 456                                 /* empty queues */
 457
 458                                 iprclearqueues(sc);
 459                         }
 460
 461                         if(ifr->ifr_flags & IFF_DEBUG)
 462                         {
 463                                 /* enable debug messages */
 464                         }
 465
 466                         microtime(&sc->sc_if.if_lastchange);
 467                         break;
 468
 469                 case SIOCSIFMTU:        /* set interface MTU */
 470                         if(ifr->ifr_mtu > I4BIPRMAXMTU)
 471                                 error = EINVAL;
 472                         else if(ifr->ifr_mtu < I4BIPRMINMTU)
 473                                 error = EINVAL;
 474                         else
 475                         {
 476                                 ifp->if_mtu = ifr->ifr_mtu;
 477                                 microtime(&sc->sc_if.if_lastchange);
 478                         }
 479                         break;
 480
 481 #if 0
 482         /* not needed for FreeBSD, done in sl_compress_init() (-hm) */
 483
 484                         /* need to add an ioctl:        set VJ max slot ID
 485                          * #define IPRIOCSMAXCID        _IOW('I', XXX, int)
 486                          */
 487 #ifdef IPR_VJ
 488                 case IPRIOCSMAXCID:
 489                         {
 490                         struct thread *td = curthread;  /* XXX */
 491
 492                         if ((error = suser(td)) != 0)
 493                                 return (error);
 494                         sl_compress_setup(sc->sc_compr, *(int *)data);
 495                         }
 496                         break;
 497 #endif
 498 #endif
 499                 default:
 500                         error = EINVAL;
 501                         break;
 502         }
 503
 504         crit_exit();
 505
 506         return(error);
 507 }
 508
 509 /*---------------------------------------------------------------------------*
 510  *      clear the interface's send queues
 511  *---------------------------------------------------------------------------*/
 512 static void
 513 iprclearqueues(struct ipr_softc *sc)
 514 {
 515         struct mbuf *m;
 516
 517         for(;;)
 518         {
 519                 crit_enter();
 520                 IF_DEQUEUE(&sc->sc_fastq, m);
 521                 crit_exit();
 522                 if(m)
 523                         m_freem(m);
 524                 else
 525                         break;
 526         }
 527
 528         for(;;)
 529         {
 530                 crit_enter();
 531                 IF_DEQUEUE(&sc->sc_if.if_snd, m);
 532                 crit_exit();
 533                 if(m)
 534                         m_freem(m);
 535                 else
 536                         break;
 537         }
 538 }
 539
 540 #if I4BIPRACCT
 541 /*---------------------------------------------------------------------------*
 542  *      watchdog routine
 543  *---------------------------------------------------------------------------*/
 544 static void
 545 iprwatchdog(struct ifnet *ifp)
 546 {
 547         struct ipr_softc *sc = ifp->if_softc;
 548         int unit = sc->sc_unit;
 549         bchan_statistics_t bs;
 550
 551         /* get # of bytes in and out from the HSCX driver */
 552
 553         (*isdn_linktab[unit]->bch_stat)
 554                 (isdn_linktab[unit]->unit, isdn_linktab[unit]->channel, &bs);
 555
 556         sc->sc_ioutb += bs.outbytes;
 557         sc->sc_iinb += bs.inbytes;
 558
 559         if((sc->sc_iinb != sc->sc_linb) || (sc->sc_ioutb != sc->sc_loutb) || sc->sc_fn)
 560         {
 561                 int ri = (sc->sc_iinb - sc->sc_linb)/I4BIPRACCTINTVL;
 562                 int ro = (sc->sc_ioutb - sc->sc_loutb)/I4BIPRACCTINTVL;
 563
 564                 if((sc->sc_iinb == sc->sc_linb) && (sc->sc_ioutb == sc->sc_loutb))
 565                         sc->sc_fn = 0;
 566                 else
 567                         sc->sc_fn = 1;
 568
 569                 sc->sc_linb = sc->sc_iinb;
 570                 sc->sc_loutb = sc->sc_ioutb;
 571
 572                 i4b_l4_accounting(BDRV_IPR, unit, ACCT_DURING,
 573                          sc->sc_ioutb, sc->sc_iinb, ro, ri, sc->sc_outb, sc->sc_inb);
 574         }
 575         sc->sc_if.if_timer = I4BIPRACCTINTVL;
 576 }
 577 #endif /* I4BIPRACCT */
 578
 579 /*===========================================================================*
 580  *                      ISDN INTERFACE ROUTINES
 581  *===========================================================================*/
 582
 583 /*---------------------------------------------------------------------------*
 584  *      start transmitting after connect
 585  *---------------------------------------------------------------------------*/
 586 static void
 587 i4bipr_connect_startio(struct ipr_softc *sc)
 588 {
 589         crit_enter();
 590
 591         if(sc->sc_state == ST_CONNECTED_W)
 592         {
 593                 sc->sc_state = ST_CONNECTED_A;
 594                 ipr_tx_queue_empty(THE_UNIT);
 595         }
 596
 597         crit_exit();
 598 }
 599
 600 /*---------------------------------------------------------------------------*
 601  *      this routine is called from L4 handler at connect time
 602  *---------------------------------------------------------------------------*/
 603 static void
 604 ipr_connect(int unit, void *cdp)
 605 {
 606         struct ipr_softc *sc = &ipr_softc[unit];
 607
 608         sc->sc_cdp = (call_desc_t *)cdp;
 609
 610         crit_enter();
 611
 612         NDBGL4(L4_DIALST, "ipr%d: setting dial state to ST_CONNECTED", unit);
 613
 614         sc->sc_if.if_flags |= IFF_RUNNING;
 615         sc->sc_state = ST_CONNECTED_W;
 616
 617         sc->sc_dialresp = DSTAT_NONE;
 618         sc->sc_lastdialresp = DSTAT_NONE;
 619
 620 #if I4BIPRACCT
 621         sc->sc_iinb = 0;
 622         sc->sc_ioutb = 0;
 623         sc->sc_inb = 0;
 624         sc->sc_outb = 0;
 625         sc->sc_linb = 0;
 626         sc->sc_loutb = 0;
 627         sc->sc_if.if_timer = I4BIPRACCTINTVL;
 628 #endif
 629
 630 #ifdef I4BIPRADJFRXP
 631         sc->sc_first_pkt = 1;
 632 #endif
 633
 634         /*
 635          * Sometimes ISDN B-channels are switched thru asymmetic. This
 636          * means that under such circumstances B-channel data (the first
 637          * three packets of a TCP connection in my case) may get lost,
 638          * causing a large delay until the connection is started.
 639          * When the sending of the very first packet of a TCP connection
 640          * is delayed for a to be empirically determined delay (close
 641          * to a second in my case) those packets go thru and the TCP
 642          * connection comes up "almost" immediately (-hm).
 643          */
 644
 645         if(sc->sc_cdp->isdntxdelay > 0)
 646         {
 647                 int delay;
 648
 649                 if (hz == 100) {
 650                         delay = sc->sc_cdp->isdntxdelay;        /* avoid any rounding */
 651                 } else {
 652                         delay = sc->sc_cdp->isdntxdelay*hz;
 653                         delay /= 100;
 654                 }
 655
 656                 callout_reset(&sc->sc_timeout, delay,
 657                                 (TIMEOUT_FUNC_T)i4bipr_connect_startio, sc);
 658         }
 659         else
 660         {
 661                 sc->sc_state = ST_CONNECTED_A;
 662                 ipr_tx_queue_empty(unit);
 663         }
 664
 665         crit_exit();
 666
 667         /* we don't need any negotiation - pass event back right now */
 668         i4b_l4_negcomplete(sc->sc_cdp);
 669 }
 670
 671 /*---------------------------------------------------------------------------*
 672  *      this routine is called from L4 handler at disconnect time
 673  *---------------------------------------------------------------------------*/
 674 static void
 675 ipr_disconnect(int unit, void *cdp)
 676 {
 677         call_desc_t *cd = (call_desc_t *)cdp;
 678         struct ipr_softc *sc = &ipr_softc[unit];
 679
 680         /* new stuff to check that the active channel is being closed */
 681
 682         if (cd != sc->sc_cdp)
 683         {
 684                 NDBGL4(L4_IPRDBG, "ipr%d: channel %d not active",
 685                                 cd->driver_unit, cd->channelid);
 686                 return;
 687         }
 688
 689 #if I4BIPRACCT
 690         sc->sc_if.if_timer = 0;
 691 #endif
 692 #if IPR_LOG
 693         /* show next IPR_LOG packets again */
 694         sc->sc_log_first = IPR_LOG;
 695 #endif
 696
 697         i4b_l4_accounting(BDRV_IPR, cd->driver_unit, ACCT_FINAL,
 698                  sc->sc_ioutb, sc->sc_iinb, 0, 0, sc->sc_outb, sc->sc_inb);
 699
 700         sc->sc_cdp = (call_desc_t *)0;
 701
 702         NDBGL4(L4_DIALST, "setting dial state to ST_IDLE");
 703
 704         sc->sc_dialresp = DSTAT_NONE;
 705         sc->sc_lastdialresp = DSTAT_NONE;
 706
 707         sc->sc_if.if_flags &= ~IFF_RUNNING;
 708         sc->sc_state = ST_IDLE;
 709 }
 710
 711 /*---------------------------------------------------------------------------*
 712  *      this routine is used to give a feedback from userland daemon
 713  *      in case of dial problems
 714  *---------------------------------------------------------------------------*/
 715 static void
 716 ipr_dialresponse(int unit, int status, cause_t cause)
 717 {
 718         struct ipr_softc *sc = &ipr_softc[unit];
 719         sc->sc_dialresp = status;
 720
 721         NDBGL4(L4_IPRDBG, "ipr%d: last=%d, this=%d",
 722                 unit, sc->sc_lastdialresp, sc->sc_dialresp);
 723
 724         if(status != DSTAT_NONE)
 725         {
 726                 NDBGL4(L4_IPRDBG, "ipr%d: clearing queues", unit);
 727                 iprclearqueues(sc);
 728         }
 729 }
 730
 731 /*---------------------------------------------------------------------------*
 732  *      interface soft up/down
 733  *---------------------------------------------------------------------------*/
 734 static void
 735 ipr_updown(int unit, int updown)
 736 {
 737         struct ipr_softc *sc = &ipr_softc[unit];
 738         sc->sc_updown = updown;
 739 }
 740
 741 /*---------------------------------------------------------------------------*
 742  *      this routine is called from the HSCX interrupt handler
 743  *      when a new frame (mbuf) has been received and was put on
 744  *      the rx queue. It is assumed that this routines runs in
 745  *      a critical section ! Keep it short !
 746  *---------------------------------------------------------------------------*/
 747 static void
 748 ipr_rx_data_rdy(int unit)
 749 {
 750         struct ipr_softc *sc = &ipr_softc[unit];
 751         struct mbuf *m;
 752 #ifdef IPR_VJ
 753 #ifdef IPR_VJ_USEBUFFER
 754         u_char *cp = sc->sc_cbuf;
 755 #endif
 756         int len, c;
 757 #endif
 758         static const uint32_t af = AF_INET;
 759
 760         if((m = *isdn_linktab[unit]->rx_mbuf) == NULL)
 761                 return;
 762
 763         m->m_pkthdr.rcvif = &sc->sc_if;
 764
 765         m->m_pkthdr.len = m->m_len;
 766
 767         microtime(&sc->sc_if.if_lastchange);
 768
 769 #ifdef I4BIPRADJFRXP
 770
 771         /*
 772          * The very first packet after the B channel is switched thru
 773          * has very often several bytes of random data prepended. This
 774          * routine looks where the IP header starts and removes the
 775          * the bad data.
 776          */
 777
 778         if(sc->sc_first_pkt)
 779         {
 780                 unsigned char *mp = m->m_data;
 781                 int i;
 782
 783                 sc->sc_first_pkt = 0;
 784
 785                 for(i = 0; i < m->m_len; i++, mp++)
 786                 {
 787                         if( ((*mp & 0xf0) == 0x40) &&
 788                             ((*mp & 0x0f) >= 0x05) )
 789                         {
 790                                 m->m_data = mp;
 791                                 m->m_pkthdr.len -= i;
 792                                 break;
 793                         }
 794                 }
 795         }
 796 #endif
 797
 798         sc->sc_if.if_ipackets++;
 799         sc->sc_if.if_ibytes += m->m_pkthdr.len;
 800
 801 #ifdef  IPR_VJ
 802         if((c = (*(mtod(m, u_char *)) & 0xf0)) != (IPVERSION << 4))
 803         {
 804                 /* copy data to buffer */
 805
 806                 len = m->m_len;
 807
 808 #ifdef IPR_VJ_USEBUFFER
 809 /* XXX */       m_copydata(m, 0, len, cp);
 810 #endif
 811
 812                 if(c & 0x80)
 813                 {
 814                         c = TYPE_COMPRESSED_TCP;
 815                 }
 816                 else if(c == TYPE_UNCOMPRESSED_TCP)
 817                 {
 818 #ifdef IPR_VJ_USEBUFFER
 819                         *cp &= 0x4f;            /* XXX */
 820 #else
 821                         *(mtod(m, u_char *)) &= 0x4f;
 822 #endif
 823                 }
 824
 825                 /*
 826                  * We've got something that's not an IP packet.
 827                  * If compression is enabled, try to decompress it.
 828                  * Otherwise, if `auto-enable' compression is on and
 829                  * it's a reasonable packet, decompress it and then
 830                  * enable compression.  Otherwise, drop it.
 831                  */
 832                 if(sc->sc_if.if_flags & IPR_COMPRESS)
 833                 {
 834 #ifdef IPR_VJ_USEBUFFER
 835                         len = sl_uncompress_tcp(&cp,len,(u_int)c,&sc->sc_compr);
 836 #else
 837                         len = sl_uncompress_tcp((u_char **)&m->m_data, len,
 838                                         (u_int)c, &sc->sc_compr);
 839 #endif
 840
 841                         if(len <= 0)
 842                         {
 843 #ifdef DEBUG_IPR_VJ
 844                                 printf("i4b_ipr, ipr_rx_data_rdy: len <= 0 IPR_COMPRESS!\n");
 845 #endif
 846                                 goto error;
 847                         }
 848                 }
 849                 else if((sc->sc_if.if_flags & IPR_AUTOCOMP) &&
 850                         (c == TYPE_UNCOMPRESSED_TCP) && (len >= 40))
 851                 {
 852 #ifdef IPR_VJ_USEBUFFER
 853                         len = sl_uncompress_tcp(&cp,len,(u_int)c,&sc->sc_compr);
 854 #else
 855                         len = sl_uncompress_tcp((u_char **)&m->m_data, len,
 856                                         (u_int)c, &sc->sc_compr);
 857 #endif
 858
 859                         if(len <= 0)
 860                         {
 861 #ifdef DEBUG_IPR_VJ
 862                                 printf("i4b_ipr, ipr_rx_data_rdy: len <= 0 IPR_AUTOCOMP!\n");
 863 #endif
 864                                 goto error;
 865                         }
 866
 867                         sc->sc_if.if_flags |= IPR_COMPRESS;
 868                 }
 869                 else
 870                 {
 871 #ifdef DEBUG_IPR_VJ
 872                         printf("i4b_ipr, ipr_input: invalid ip packet!\n");
 873 #endif
 874
 875 error:
 876                         sc->sc_if.if_ierrors++;
 877                         sc->sc_if.if_collisions++;
 878                         m_freem(m);
 879                         return;
 880                 }
 881 #ifdef IPR_VJ_USEBUFFER
 882 /* XXX */       m_copyback(m, 0, len, cp);
 883 #else
 884                 m->m_len = m->m_pkthdr.len = len;
 885 #endif
 886         }
 887 #endif
 888
 889 #if I4BIPRACCT
 890         /* NB. do the accounting after decompression!           */
 891         sc->sc_inb += m->m_pkthdr.len;
 892 #endif
 893 #if IPR_LOG
 894         if(sc->sc_log_first > 0)
 895         {
 896                 --(sc->sc_log_first);
 897                 i4b_l4_packet_ind(BDRV_IPR, unit, 0, m );
 898         }
 899 #endif
 900
 901         if (sc->sc_if.if_bpf)
 902                 bpf_ptap(sc->sc_if.if_bpf, m, &af, sizeof(af));
 903
 904         if (netisr_queue(NETISR_IP, m)) {
 905                 NDBGL4(L4_IPRDBG, "ipr%d: ipintrq full!", unit);
 906                 sc->sc_if.if_ierrors++;
 907                 sc->sc_if.if_iqdrops++;
 908         }
 909 }
 910
 911 /*---------------------------------------------------------------------------*
 912  *      this routine is called from the HSCX interrupt handler
 913  *      when the last frame has been sent out and there is no
 914  *      further frame (mbuf) in the tx queue.
 915  *---------------------------------------------------------------------------*/
 916 static void
 917 ipr_tx_queue_empty(int unit)
 918 {
 919         static const uint32_t af = AF_INET;
 920         struct ipr_softc *sc = &ipr_softc[unit];
 921         struct mbuf *m;
 922 #ifdef  IPR_VJ
 923         struct ip *ip;
 924 #endif
 925         int x = 0;
 926
 927         if(sc->sc_state != ST_CONNECTED_A)
 928                 return;
 929
 930         for(;;)
 931         {
 932                 IF_DEQUEUE(&sc->sc_fastq, m);
 933                 if(m)
 934                 {
 935                         sc->sc_if.if_omcasts++;
 936                 }
 937                 else
 938                 {
 939                         IF_DEQUEUE(&sc->sc_if.if_snd, m);
 940                         if(m == NULL)
 941                                 break;
 942                 }
 943
 944                 microtime(&sc->sc_if.if_lastchange);
 945
 946                 if (sc->sc_if.if_bpf)
 947                         bpf_ptap(sc->sc_if.if_bpf, m, &af, sizeof(af));
 948
 949 #if I4BIPRACCT
 950                 sc->sc_outb += m->m_pkthdr.len; /* size before compression */
 951 #endif
 952
 953 #ifdef  IPR_VJ
 954                 if((ip = mtod(m, struct ip *))->ip_p == IPPROTO_TCP)
 955                 {
 956                         if(sc->sc_if.if_flags & IPR_COMPRESS)
 957                         {
 958                                 *mtod(m, u_char *) |= sl_compress_tcp(m, ip,
 959                                         &sc->sc_compr, 1);
 960                         }
 961                 }
 962 #endif
 963                 x = 1;
 964
 965                 if(IF_QFULL(isdn_linktab[unit]->tx_queue))
 966                 {
 967                         NDBGL4(L4_IPRDBG, "ipr%d: tx queue full!", unit);
 968                         m_freem(m);
 969                 }
 970                 else
 971                 {
 972                         sc->sc_if.if_obytes += m->m_pkthdr.len;
 973
 974                         sc->sc_if.if_opackets++;
 975
 976                         IF_ENQUEUE(isdn_linktab[unit]->tx_queue, m);
 977
 978                 }
 979         }
 980
 981         if(x)
 982                 (*isdn_linktab[unit]->bch_tx_start)(isdn_linktab[unit]->unit, isdn_linktab[unit]->channel);
 983 }
 984
 985 /*---------------------------------------------------------------------------*
 986  *      this routine is called from the HSCX interrupt handler
 987  *      each time a packet is received or transmitted. It should
 988  *      be used to implement an activity timeout mechanism.
 989  *---------------------------------------------------------------------------*/
 990 static void
 991 ipr_activity(int unit, int rxtx)
 992 {
 993         ipr_softc[unit].sc_cdp->last_active_time = SECOND;
 994 }
 995
 996 /*---------------------------------------------------------------------------*
 997  *      return this drivers linktab address
 998  *---------------------------------------------------------------------------*/
 999 drvr_link_t *
1000 ipr_ret_linktab(int unit)
1001 {
1002         return(&ipr_drvr_linktab[unit]);
1003 }
1004
1005 /*---------------------------------------------------------------------------*
1006  *      setup the isdn_linktab for this driver
1007  *---------------------------------------------------------------------------*/
1008 void
1009 ipr_set_linktab(int unit, isdn_link_t *ilt)
1010 {
1011         isdn_linktab[unit] = ilt;
1012 }
1013
1014 /*---------------------------------------------------------------------------*
1015  *      initialize this drivers linktab
1016  *---------------------------------------------------------------------------*/
1017 static void
1018 ipr_init_linktab(int unit)
1019 {
1020         ipr_drvr_linktab[unit].unit = unit;
1021         ipr_drvr_linktab[unit].bch_rx_data_ready = ipr_rx_data_rdy;
1022         ipr_drvr_linktab[unit].bch_tx_queue_empty = ipr_tx_queue_empty;
1023         ipr_drvr_linktab[unit].bch_activity = ipr_activity;
1024         ipr_drvr_linktab[unit].line_connected = ipr_connect;
1025         ipr_drvr_linktab[unit].line_disconnected = ipr_disconnect;
1026         ipr_drvr_linktab[unit].dial_response = ipr_dialresponse;
1027         ipr_drvr_linktab[unit].updown_ind = ipr_updown;
1028 }
1029
1030 /*===========================================================================*/
1031
1032 #endif /* NI4BIPR > 0 */