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 1.15 2005/02/10 00:20:09 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 #if defined(__DragonFly__) || defined(__FreeBSD__)
  65 #include "opt_i4b.h"
  66 #endif
  67
  68 #include <sys/param.h>
  69 #include <sys/systm.h>
  70 #include <sys/mbuf.h>
  71 #include <sys/socket.h>
  72 #include <sys/errno.h>
  73
  74 #if defined(__DragonFly__) || defined(__FreeBSD__)
  75 #include <sys/ioccom.h>
  76 #include <sys/sockio.h>
  77 #ifdef IPR_VJ
  78 #include <sys/malloc.h>
  79 #endif
  80 #else
  81 #include <sys/ioctl.h>
  82 #endif
  83
  84 #if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
  85 #include <sys/callout.h>
  86 #endif
  87
  88 #include <sys/kernel.h>
  89
  90 #include <net/if.h>
  91 #include <net/if_types.h>
  92 #include <net/netisr.h>
  93
  94 #include <netinet/in.h>
  95 #include <netinet/in_systm.h>
  96 #include <netinet/in_var.h>
  97 #include <netinet/ip.h>
  98
  99 #ifdef IPR_VJ
 100 #include <net/slcompress.h>
 101 #define IPR_COMPRESS IFF_LINK0  /* compress TCP traffic */
 102 #define IPR_AUTOCOMP IFF_LINK1  /* auto-enable TCP compression */
 103
 104 /*---------------------------------------------------------------------------
 105  * NOTICE: using NO separate buffer relies on the assumption, that the HSCX
 106  * IRQ handler _always_ allocates a single, continuous mbuf cluster large
 107  * enough to hold the maximum MTU size if the ipr interface !
 108  *
 109  * CAUTION: i have re-defined IPR_VJ_USEBUFFER because it makes problems
 110  *          with 2 i4b's back to back running cvs over ssh, cvs simply
 111  *          aborts because it gets bad data. Everything else (telnet/ftp?etc)
 112  *          functions fine.
 113  *---------------------------------------------------------------------------*/
 114 #define IPR_VJ_USEBUFFER        /* define to use an allocated separate buffer*/
 115                                 /* undef to uncompress in the mbuf itself    */
 116 #endif /* IPR_VJ */
 117
 118 #if defined(__DragonFly__) || (defined(__FreeBSD_version) &&  __FreeBSD_version >= 400008)
 119 #include "use_bpf.h"
 120 #else
 121 #include "bpfilter.h"
 122 #endif
 123
 124 #if NBPFILTER > 0 || NBPF > 0
 125 #include <sys/time.h>
 126 #include <net/bpf.h>
 127 #endif
 128
 129 #if defined(__DragonFly__) || defined(__FreeBSD__)
 130 #include <net/i4b/include/machine/i4b_debug.h>
 131 #include <net/i4b/include/machine/i4b_ioctl.h>
 132 #else
 133 #include <i4b/i4b_debug.h>
 134 #include <i4b/i4b_ioctl.h>
 135 #endif
 136
 137 #include "../include/i4b_global.h"
 138 #include "../include/i4b_l3l4.h"
 139
 140 #include "../layer4/i4b_l4.h"
 141
 142 #if !defined(__DragonFly__) || !defined(__FreeBSD__)
 143 #include <machine/cpu.h> /* For softnet */
 144 #endif
 145
 146 #if defined(__FreeBSD__) && !defined(__DragonFly__)
 147 #define IPR_FMT "ipr%d: "
 148 #define IPR_ARG(sc)     ((sc)->sc_if.if_unit)
 149 #define PDEVSTATIC      static
 150 #elif defined(__bsdi__)
 151 #define IPR_FMT "ipr%d: "
 152 #define IPR_ARG(sc)     ((sc)->sc_if.if_unit)
 153 #define PDEVSTATIC      /* not static */
 154 #else
 155 #define IPR_FMT "%s: "
 156 #define IPR_ARG(sc)     ((sc)->sc_if.if_xname)
 157 #define PDEVSTATIC      /* not static */
 158 #endif
 159
 160 #define I4BIPRMTU       1500            /* regular MTU */
 161 #define I4BIPRMAXMTU    2000            /* max MTU */
 162 #define I4BIPRMINMTU    500             /* min MTU */
 163
 164 #define I4BIPRMAXQLEN   50              /* max queue length */
 165
 166 #define I4BIPRACCT      1               /* enable accounting messages */
 167 #define I4BIPRACCTINTVL 2               /* accounting msg interval in secs */
 168 #define I4BIPRADJFRXP   1               /* adjust 1st rxd packet */
 169
 170 /* initialized by L4 */
 171
 172 static drvr_link_t ipr_drvr_linktab[NI4BIPR];
 173 static isdn_link_t *isdn_linktab[NI4BIPR];
 174
 175 struct ipr_softc {
 176         struct ifnet    sc_if;          /* network-visible interface    */
 177         int             sc_state;       /* state of the interface       */
 178
 179 #if !defined(__FreeBSD__) || defined(__DragonFly__)
 180         int             sc_unit;        /* unit number for Net/OpenBSD  */
 181 #endif
 182
 183         call_desc_t     *sc_cdp;        /* ptr to call descriptor       */
 184         int             sc_updown;      /* soft state of interface      */
 185         struct ifqueue  sc_fastq;       /* interactive traffic          */
 186         int             sc_dialresp;    /* dialresponse                 */
 187         int             sc_lastdialresp;/* last dialresponse            */
 188
 189 #if I4BIPRACCT
 190         int             sc_iinb;        /* isdn driver # of inbytes     */
 191         int             sc_ioutb;       /* isdn driver # of outbytes    */
 192         int             sc_inb;         /* # of bytes rx'd              */
 193         int             sc_outb;        /* # of bytes tx'd              */
 194         int             sc_linb;        /* last # of bytes rx'd         */
 195         int             sc_loutb;       /* last # of bytes tx'd         */
 196         int             sc_fn;          /* flag, first null acct        */
 197 #endif
 198
 199         struct callout  sc_timeout;
 200
 201 #ifdef I4BIPRADJFRXP
 202         int             sc_first_pkt;   /* flag, first rxd packet       */
 203 #endif
 204 #if IPR_LOG
 205         int             sc_log_first;   /* log first n packets          */
 206 #endif
 207
 208 #ifdef IPR_VJ
 209         struct slcompress sc_compr;     /* tcp compression data         */
 210 #ifdef IPR_VJ_USEBUFFER
 211         u_char          *sc_cbuf;       /* tcp decompression buffer     */
 212 #endif
 213 #endif
 214
 215 } ipr_softc[NI4BIPR];
 216
 217 enum ipr_states {
 218         ST_IDLE,                        /* initialized, ready, idle     */
 219         ST_DIALING,                     /* dialling out to remote       */
 220         ST_CONNECTED_W,                 /* connected to remote          */
 221         ST_CONNECTED_A,                 /* connected to remote          */
 222 };
 223
 224 #if (defined(__FreeBSD__) && !defined(__DragonFly__)) || (defined(__bsdi__))
 225 #define THE_UNIT        sc->sc_if.if_unit
 226 #else
 227 #define THE_UNIT        sc->sc_unit
 228 #endif
 229
 230 #if defined(__DragonFly__) || defined __FreeBSD__ || defined __NetBSD__
 231 #  define IOCTL_CMD_T u_long
 232 #else
 233 #  define IOCTL_CMD_T int
 234 #endif
 235
 236 #if defined(__DragonFly__) || defined(__FreeBSD__)
 237 PDEVSTATIC void i4biprattach(void *);
 238 PSEUDO_SET(i4biprattach, i4b_ipr);
 239 static int i4biprioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, caddr_t data,
 240                        struct ucred *cr);
 241 #else
 242 PDEVSTATIC void i4biprattach (void);
 243 static int i4biprioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
 244 #endif
 245
 246 #ifdef __bsdi__
 247 static int iprwatchdog(int unit);
 248 #else
 249 static void iprwatchdog(struct ifnet *ifp);
 250 #endif
 251 static void ipr_init_linktab(int unit);
 252 static void ipr_tx_queue_empty(int unit);
 253 static int i4biproutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, struct rtentry *rtp);
 254 static void iprclearqueues(struct ipr_softc *sc);
 255
 256 /*===========================================================================*
 257  *                      DEVICE DRIVER ROUTINES
 258  *===========================================================================*/
 259
 260 /*---------------------------------------------------------------------------*
 261  *      interface attach routine at kernel boot time
 262  *---------------------------------------------------------------------------*/
 263 PDEVSTATIC void
 264 #if defined(__DragonFly__) || defined(__FreeBSD__)
 265 i4biprattach(void *dummy)
 266 #else
 267 i4biprattach()
 268 #endif
 269 {
 270         struct ipr_softc *sc = ipr_softc;
 271         int i;
 272
 273 #ifdef IPR_VJ
 274         printf("i4bipr: %d IP over raw HDLC ISDN device(s) attached (VJ header compression)\n", NI4BIPR);
 275 #else
 276         printf("i4bipr: %d IP over raw HDLC ISDN device(s) attached\n", NI4BIPR);
 277 #endif
 278
 279         for(i=0; i < NI4BIPR; sc++, i++)
 280         {
 281                 ipr_init_linktab(i);
 282
 283                 NDBGL4(L4_DIALST, "setting dial state to ST_IDLE");
 284
 285                 sc->sc_state = ST_IDLE;
 286
 287 #ifdef __DragonFly__
 288                 if_initname(&(sc->sc_if), "ipr", i);
 289 #elif defined(__FreeBSD__)
 290                 sc->sc_if.if_name = "ipr";
 291                 sc->sc_if.if_unit = i;
 292 #elif defined(__bsdi__)
 293                 sc->sc_if.if_name = "ipr";
 294                 sc->sc_if.if_unit = i;
 295 #else
 296                 sprintf(sc->sc_if.if_xname, "ipr%d", i);
 297                 sc->sc_if.if_softc = sc;
 298                 sc->sc_unit = i;
 299 #endif
 300
 301 #ifdef  IPR_VJ
 302                 sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_SIMPLEX | IPR_AUTOCOMP;
 303 #else
 304                 sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_SIMPLEX;
 305 #endif
 306
 307                 callout_init(&sc->sc_timeout);
 308
 309                 sc->sc_if.if_mtu = I4BIPRMTU;
 310                 sc->sc_if.if_type = IFT_ISDNBASIC;
 311                 sc->sc_if.if_ioctl = i4biprioctl;
 312                 sc->sc_if.if_output = i4biproutput;
 313
 314                 sc->sc_if.if_snd.ifq_maxlen = I4BIPRMAXQLEN;
 315                 sc->sc_fastq.ifq_maxlen = I4BIPRMAXQLEN;
 316
 317 #if defined (__FreeBSD__) && __FreeBSD__ > 4
 318                 mtx_init(&sc->sc_fastq.ifq_mtx, "i4b_ipr_fastq", MTX_DEF);
 319 #endif
 320                 sc->sc_if.if_ipackets = 0;
 321                 sc->sc_if.if_ierrors = 0;
 322                 sc->sc_if.if_opackets = 0;
 323                 sc->sc_if.if_oerrors = 0;
 324                 sc->sc_if.if_collisions = 0;
 325                 sc->sc_if.if_ibytes = 0;
 326                 sc->sc_if.if_obytes = 0;
 327                 sc->sc_if.if_imcasts = 0;
 328                 sc->sc_if.if_omcasts = 0;
 329                 sc->sc_if.if_iqdrops = 0;
 330                 sc->sc_if.if_noproto = 0;
 331
 332 #if I4BIPRACCT
 333                 sc->sc_if.if_timer = 0;
 334                 sc->sc_if.if_watchdog = iprwatchdog;
 335                 sc->sc_iinb = 0;
 336                 sc->sc_ioutb = 0;
 337                 sc->sc_inb = 0;
 338                 sc->sc_outb = 0;
 339                 sc->sc_linb = 0;
 340                 sc->sc_loutb = 0;
 341                 sc->sc_fn = 1;
 342 #endif
 343 #if IPR_LOG
 344                 sc->sc_log_first = IPR_LOG;
 345 #endif
 346
 347 #ifdef  IPR_VJ
 348 #if defined(__DragonFly__) || defined(__FreeBSD__)
 349                 sl_compress_init(&sc->sc_compr, -1);
 350 #else
 351                 sl_compress_init(&sc->sc_compr);
 352 #endif
 353
 354 #ifdef IPR_VJ_USEBUFFER
 355                 if(!((sc->sc_cbuf =
 356                    (u_char *)malloc(I4BIPRMAXMTU+128, M_DEVBUF, M_WAITOK))))
 357                 {
 358                         panic("if_ipr.c, ipr_attach: VJ malloc failed");
 359                 }
 360 #endif
 361 #endif
 362                 sc->sc_updown = SOFT_ENA;       /* soft enabled */
 363                 sc->sc_dialresp = DSTAT_NONE;   /* no response */
 364                 sc->sc_lastdialresp = DSTAT_NONE;
 365
 366                 if_attach(&sc->sc_if);
 367
 368 #if NBPFILTER > 0 || NBPF > 0
 369 #if defined(__DragonFly__) || defined(__FreeBSD__)
 370                 bpfattach(&sc->sc_if, DLT_NULL, sizeof(u_int));
 371 #else
 372                 bpfattach(&sc->sc_if.if_bpf, &sc->sc_if, DLT_NULL, sizeof(u_int));
 373 #endif
 374 #endif
 375         }
 376 }
 377
 378 /*---------------------------------------------------------------------------*
 379  *      output a packet to the ISDN B-channel
 380  *---------------------------------------------------------------------------*/
 381 static int
 382 i4biproutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
 383          struct rtentry *rtp)
 384 {
 385         struct ipr_softc *sc;
 386         int unit;
 387         int s;
 388         struct ip *ip;
 389
 390         s = SPLI4B();
 391
 392 #if (defined(__FreeBSD__) && !defined(__DragonFly__)) || (defined(__bsdi__))
 393         unit = ifp->if_unit;
 394         sc = &ipr_softc[unit];
 395 #else
 396         sc = ifp->if_softc;
 397         unit = sc->sc_unit;
 398 #endif
 399
 400         /* check for IP */
 401
 402         if(dst->sa_family != AF_INET)
 403         {
 404                 printf(IPR_FMT "af%d not supported\n", IPR_ARG(sc), dst->sa_family);
 405                 m_freem(m);
 406                 splx(s);
 407                 sc->sc_if.if_noproto++;
 408                 sc->sc_if.if_oerrors++;
 409                 return(EAFNOSUPPORT);
 410         }
 411
 412         /* check interface state = UP */
 413
 414         if(!(ifp->if_flags & IFF_UP))
 415         {
 416                 NDBGL4(L4_IPRDBG, "ipr%d: interface is DOWN!", unit);
 417                 m_freem(m);
 418                 splx(s);
 419                 sc->sc_if.if_oerrors++;
 420                 return(ENETDOWN);
 421         }
 422
 423         /* dial if necessary */
 424
 425         if(sc->sc_state == ST_IDLE || sc->sc_state == ST_DIALING)
 426         {
 427
 428 #ifdef NOTDEF
 429                 switch(sc->sc_dialresp)
 430                 {
 431                         case DSTAT_TFAIL:       /* transient failure */
 432                                 NDBGL4(L4_IPRDBG, "ipr%d: transient dial failure!", unit);
 433                                 m_freem(m);
 434                                 iprclearqueues(sc);
 435                                 sc->sc_dialresp = DSTAT_NONE;
 436                                 splx(s);
 437                                 sc->sc_if.if_oerrors++;
 438                                 return(ENETUNREACH);
 439                                 break;
 440
 441                         case DSTAT_PFAIL:       /* permanent failure */
 442                                 NDBGL4(L4_IPRDBG, "ipr%d: permanent dial failure!", unit);
 443                                 m_freem(m);
 444                                 iprclearqueues(sc);
 445                                 sc->sc_dialresp = DSTAT_NONE;
 446                                 splx(s);
 447                                 sc->sc_if.if_oerrors++;
 448                                 return(EHOSTUNREACH);
 449                                 break;
 450
 451                         case DSTAT_INONLY:      /* no dialout allowed*/
 452                                 NDBGL4(L4_IPRDBG, "ipr%d: dialout not allowed failure!", unit);
 453                                 m_freem(m);
 454                                 iprclearqueues(sc);
 455                                 sc->sc_dialresp = DSTAT_NONE;
 456                                 splx(s);
 457                                 sc->sc_if.if_oerrors++;
 458                                 return(EHOSTUNREACH);
 459                                 break;
 460                 }
 461 #endif
 462
 463                 NDBGL4(L4_IPRDBG, "ipr%d: send dial request message!", unit);
 464                 NDBGL4(L4_DIALST, "ipr%d: setting dial state to ST_DIALING", unit);
 465                 i4b_l4_dialout(BDRV_IPR, unit);
 466                 sc->sc_state = ST_DIALING;
 467         }
 468
 469 #if IPR_LOG
 470         if(sc->sc_log_first > 0)
 471         {
 472                 --(sc->sc_log_first);
 473                 i4b_l4_packet_ind(BDRV_IPR, unit, 1, m );
 474         }
 475 #endif
 476
 477         /* update access time */
 478
 479         microtime(&sc->sc_if.if_lastchange);
 480
 481         /*
 482          * check, if type of service indicates interactive, i.e. telnet,
 483          * traffic. in case it is interactive, put it into the fast queue,
 484          * else (i.e. ftp traffic) put it into the "normal" queue
 485          */
 486
 487         ip = mtod(m, struct ip *);              /* get ptr to ip header */
 488
 489         /* check for space in choosen send queue */
 490
 491 #if defined(__DragonFly__) || defined (__FreeBSD__)
 492         if (netisr_queue(NETISR_IP, m))
 493         {
 494                 NDBGL4(L4_IPRDBG, "ipr%d: send queue full!", unit);
 495                 splx(s);
 496                 sc->sc_if.if_oerrors++;
 497                 return(ENOBUFS);
 498         }
 499 #endif
 500
 501         NDBGL4(L4_IPRDBG, "ipr%d: add packet to send queue!", unit);
 502
 503         ipr_tx_queue_empty(unit);
 504
 505         splx(s);
 506
 507         return (0);
 508 }
 509
 510 /*---------------------------------------------------------------------------*
 511  *      process ioctl
 512  *---------------------------------------------------------------------------*/
 513 #if defined(__DragonFly__) || defined(__FreeBSD__)
 514 static int
 515 i4biprioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, caddr_t data, struct ucred *cr)
 516 #else
 517 static int
 518 i4biprioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
 519 #endif
 520 {
 521 #if (defined(__FreeBSD__) && !defined(__DragonFly__)) || (defined(__bsdi__))
 522         struct ipr_softc *sc = &ipr_softc[ifp->if_unit];
 523 #else
 524         struct ipr_softc *sc = ifp->if_softc;
 525 #endif
 526
 527         struct ifreq *ifr = (struct ifreq *)data;
 528         struct ifaddr *ifa = (struct ifaddr *)data;
 529         int s;
 530         int error = 0;
 531
 532         s = SPLI4B();
 533
 534         switch (cmd)
 535         {
 536                 case SIOCAIFADDR:       /* add interface address */
 537                 case SIOCSIFADDR:       /* set interface address */
 538                 case SIOCSIFDSTADDR:    /* set interface destination address */
 539                         if(ifa->ifa_addr->sa_family != AF_INET)
 540                                 error = EAFNOSUPPORT;
 541                         else
 542                                 sc->sc_if.if_flags |= IFF_UP;
 543                         microtime(&sc->sc_if.if_lastchange);
 544                         break;
 545
 546                 case SIOCSIFFLAGS:      /* set interface flags */
 547                         if(!(ifr->ifr_flags & IFF_UP))
 548                         {
 549                                 if(sc->sc_if.if_flags & IFF_RUNNING)
 550                                 {
 551                                         /* disconnect ISDN line */
 552 #if (defined(__FreeBSD__) && !defined(__DragonFly__)) || (defined(__bsdi__))
 553                                         i4b_l4_drvrdisc(BDRV_IPR, ifp->if_unit);
 554 #else
 555                                         i4b_l4_drvrdisc(BDRV_IPR, sc->sc_unit);
 556 #endif
 557                                         sc->sc_if.if_flags &= ~IFF_RUNNING;
 558                                 }
 559
 560                                 sc->sc_state = ST_IDLE;
 561
 562                                 /* empty queues */
 563
 564                                 iprclearqueues(sc);
 565                         }
 566
 567                         if(ifr->ifr_flags & IFF_DEBUG)
 568                         {
 569                                 /* enable debug messages */
 570                         }
 571
 572                         microtime(&sc->sc_if.if_lastchange);
 573                         break;
 574
 575 #if !defined(__OpenBSD__)
 576                 case SIOCSIFMTU:        /* set interface MTU */
 577                         if(ifr->ifr_mtu > I4BIPRMAXMTU)
 578                                 error = EINVAL;
 579                         else if(ifr->ifr_mtu < I4BIPRMINMTU)
 580                                 error = EINVAL;
 581                         else
 582                         {
 583                                 ifp->if_mtu = ifr->ifr_mtu;
 584                                 microtime(&sc->sc_if.if_lastchange);
 585                         }
 586                         break;
 587 #endif /* __OPENBSD__ */
 588
 589 #if 0
 590         /* not needed for FreeBSD, done in sl_compress_init() (-hm) */
 591
 592                         /* need to add an ioctl:        set VJ max slot ID
 593                          * #define IPRIOCSMAXCID        _IOW('I', XXX, int)
 594                          */
 595 #ifdef IPR_VJ
 596                 case IPRIOCSMAXCID:
 597                         {
 598                         struct thread *td = curthread;  /* XXX */
 599
 600                         if ((error = suser(td)) != 0)
 601                                 return (error);
 602                         sl_compress_setup(sc->sc_compr, *(int *)data);
 603                         }
 604                         break;
 605 #endif
 606 #endif
 607                 default:
 608                         error = EINVAL;
 609                         break;
 610         }
 611
 612         splx(s);
 613
 614         return(error);
 615 }
 616
 617 /*---------------------------------------------------------------------------*
 618  *      clear the interface's send queues
 619  *---------------------------------------------------------------------------*/
 620 static void
 621 iprclearqueues(struct ipr_softc *sc)
 622 {
 623         int x;
 624
 625 #if defined (__FreeBSD__) && __FreeBSD__ > 4
 626         x = splimp();
 627         IF_DRAIN(&sc->sc_fastq);
 628         IF_DRAIN(&sc->sc_if.if_snd);
 629         splx(x);
 630 #else
 631         struct mbuf *m;
 632
 633         for(;;)
 634         {
 635                 x = splimp();
 636                 IF_DEQUEUE(&sc->sc_fastq, m);
 637                 splx(x);
 638                 if(m)
 639                         m_freem(m);
 640                 else
 641                         break;
 642         }
 643
 644         for(;;)
 645         {
 646                 x = splimp();
 647                 IF_DEQUEUE(&sc->sc_if.if_snd, m);
 648                 splx(x);
 649                 if(m)
 650                         m_freem(m);
 651                 else
 652                         break;
 653         }
 654 #endif
 655 }
 656
 657 #if I4BIPRACCT
 658 /*---------------------------------------------------------------------------*
 659  *      watchdog routine
 660  *---------------------------------------------------------------------------*/
 661 #ifdef __bsdi__
 662 static int
 663 iprwatchdog(int unit)
 664 {
 665 #else
 666 static void
 667 iprwatchdog(struct ifnet *ifp)
 668 {
 669 #endif
 670 #if defined(__FreeBSD__) && !defined(__DragonFly__)
 671         int unit = ifp->if_unit;
 672         struct ipr_softc *sc = &ipr_softc[unit];
 673 #elif defined(__bsdi__)
 674         struct ipr_softc *sc = &ipr_softc[unit];
 675         struct ifnet *ifp = &ipr_softc[unit].sc_if;
 676 #else
 677         struct ipr_softc *sc = ifp->if_softc;
 678         int unit = sc->sc_unit;
 679 #endif
 680         bchan_statistics_t bs;
 681
 682         /* get # of bytes in and out from the HSCX driver */
 683
 684         (*isdn_linktab[unit]->bch_stat)
 685                 (isdn_linktab[unit]->unit, isdn_linktab[unit]->channel, &bs);
 686
 687         sc->sc_ioutb += bs.outbytes;
 688         sc->sc_iinb += bs.inbytes;
 689
 690         if((sc->sc_iinb != sc->sc_linb) || (sc->sc_ioutb != sc->sc_loutb) || sc->sc_fn)
 691         {
 692                 int ri = (sc->sc_iinb - sc->sc_linb)/I4BIPRACCTINTVL;
 693                 int ro = (sc->sc_ioutb - sc->sc_loutb)/I4BIPRACCTINTVL;
 694
 695                 if((sc->sc_iinb == sc->sc_linb) && (sc->sc_ioutb == sc->sc_loutb))
 696                         sc->sc_fn = 0;
 697                 else
 698                         sc->sc_fn = 1;
 699
 700                 sc->sc_linb = sc->sc_iinb;
 701                 sc->sc_loutb = sc->sc_ioutb;
 702
 703                 i4b_l4_accounting(BDRV_IPR, unit, ACCT_DURING,
 704                          sc->sc_ioutb, sc->sc_iinb, ro, ri, sc->sc_outb, sc->sc_inb);
 705         }
 706         sc->sc_if.if_timer = I4BIPRACCTINTVL;
 707 #ifdef __bsdi__
 708         return 0;
 709 #endif
 710 }
 711 #endif /* I4BIPRACCT */
 712
 713 /*===========================================================================*
 714  *                      ISDN INTERFACE ROUTINES
 715  *===========================================================================*/
 716
 717 /*---------------------------------------------------------------------------*
 718  *      start transmitting after connect
 719  *---------------------------------------------------------------------------*/
 720 static void
 721 i4bipr_connect_startio(struct ipr_softc *sc)
 722 {
 723         int s = SPLI4B();
 724
 725         if(sc->sc_state == ST_CONNECTED_W)
 726         {
 727                 sc->sc_state = ST_CONNECTED_A;
 728                 ipr_tx_queue_empty(THE_UNIT);
 729         }
 730
 731         splx(s);
 732 }
 733
 734 /*---------------------------------------------------------------------------*
 735  *      this routine is called from L4 handler at connect time
 736  *---------------------------------------------------------------------------*/
 737 static void
 738 ipr_connect(int unit, void *cdp)
 739 {
 740         struct ipr_softc *sc = &ipr_softc[unit];
 741         int s;
 742
 743         sc->sc_cdp = (call_desc_t *)cdp;
 744
 745         s = SPLI4B();
 746
 747         NDBGL4(L4_DIALST, "ipr%d: setting dial state to ST_CONNECTED", unit);
 748
 749         sc->sc_if.if_flags |= IFF_RUNNING;
 750         sc->sc_state = ST_CONNECTED_W;
 751
 752         sc->sc_dialresp = DSTAT_NONE;
 753         sc->sc_lastdialresp = DSTAT_NONE;
 754
 755 #if I4BIPRACCT
 756         sc->sc_iinb = 0;
 757         sc->sc_ioutb = 0;
 758         sc->sc_inb = 0;
 759         sc->sc_outb = 0;
 760         sc->sc_linb = 0;
 761         sc->sc_loutb = 0;
 762         sc->sc_if.if_timer = I4BIPRACCTINTVL;
 763 #endif
 764
 765 #ifdef I4BIPRADJFRXP
 766         sc->sc_first_pkt = 1;
 767 #endif
 768
 769         /*
 770          * Sometimes ISDN B-channels are switched thru asymmetic. This
 771          * means that under such circumstances B-channel data (the first
 772          * three packets of a TCP connection in my case) may get lost,
 773          * causing a large delay until the connection is started.
 774          * When the sending of the very first packet of a TCP connection
 775          * is delayed for a to be empirically determined delay (close
 776          * to a second in my case) those packets go thru and the TCP
 777          * connection comes up "almost" immediately (-hm).
 778          */
 779
 780         if(sc->sc_cdp->isdntxdelay > 0)
 781         {
 782                 int delay;
 783
 784                 if (hz == 100) {
 785                         delay = sc->sc_cdp->isdntxdelay;        /* avoid any rounding */
 786                 } else {
 787                         delay = sc->sc_cdp->isdntxdelay*hz;
 788                         delay /= 100;
 789                 }
 790
 791                 callout_reset(&sc->sc_timeout, delay,
 792                                 (TIMEOUT_FUNC_T)i4bipr_connect_startio, sc);
 793         }
 794         else
 795         {
 796                 sc->sc_state = ST_CONNECTED_A;
 797                 ipr_tx_queue_empty(unit);
 798         }
 799
 800         splx(s);
 801
 802         /* we don't need any negotiation - pass event back right now */
 803         i4b_l4_negcomplete(sc->sc_cdp);
 804 }
 805
 806 /*---------------------------------------------------------------------------*
 807  *      this routine is called from L4 handler at disconnect time
 808  *---------------------------------------------------------------------------*/
 809 static void
 810 ipr_disconnect(int unit, void *cdp)
 811 {
 812         call_desc_t *cd = (call_desc_t *)cdp;
 813         struct ipr_softc *sc = &ipr_softc[unit];
 814
 815         /* new stuff to check that the active channel is being closed */
 816
 817         if (cd != sc->sc_cdp)
 818         {
 819                 NDBGL4(L4_IPRDBG, "ipr%d: channel %d not active",
 820                                 cd->driver_unit, cd->channelid);
 821                 return;
 822         }
 823
 824 #if I4BIPRACCT
 825         sc->sc_if.if_timer = 0;
 826 #endif
 827 #if IPR_LOG
 828         /* show next IPR_LOG packets again */
 829         sc->sc_log_first = IPR_LOG;
 830 #endif
 831
 832         i4b_l4_accounting(BDRV_IPR, cd->driver_unit, ACCT_FINAL,
 833                  sc->sc_ioutb, sc->sc_iinb, 0, 0, sc->sc_outb, sc->sc_inb);
 834
 835         sc->sc_cdp = (call_desc_t *)0;
 836
 837         NDBGL4(L4_DIALST, "setting dial state to ST_IDLE");
 838
 839         sc->sc_dialresp = DSTAT_NONE;
 840         sc->sc_lastdialresp = DSTAT_NONE;
 841
 842         sc->sc_if.if_flags &= ~IFF_RUNNING;
 843         sc->sc_state = ST_IDLE;
 844 }
 845
 846 /*---------------------------------------------------------------------------*
 847  *      this routine is used to give a feedback from userland daemon
 848  *      in case of dial problems
 849  *---------------------------------------------------------------------------*/
 850 static void
 851 ipr_dialresponse(int unit, int status, cause_t cause)
 852 {
 853         struct ipr_softc *sc = &ipr_softc[unit];
 854         sc->sc_dialresp = status;
 855
 856         NDBGL4(L4_IPRDBG, "ipr%d: last=%d, this=%d",
 857                 unit, sc->sc_lastdialresp, sc->sc_dialresp);
 858
 859         if(status != DSTAT_NONE)
 860         {
 861                 NDBGL4(L4_IPRDBG, "ipr%d: clearing queues", unit);
 862                 iprclearqueues(sc);
 863         }
 864 }
 865
 866 /*---------------------------------------------------------------------------*
 867  *      interface soft up/down
 868  *---------------------------------------------------------------------------*/
 869 static void
 870 ipr_updown(int unit, int updown)
 871 {
 872         struct ipr_softc *sc = &ipr_softc[unit];
 873         sc->sc_updown = updown;
 874 }
 875
 876 /*---------------------------------------------------------------------------*
 877  *      this routine is called from the HSCX interrupt handler
 878  *      when a new frame (mbuf) has been received and was put on
 879  *      the rx queue. It is assumed that this routines runs at
 880  *      pri level splimp() ! Keep it short !
 881  *---------------------------------------------------------------------------*/
 882 static void
 883 ipr_rx_data_rdy(int unit)
 884 {
 885         struct ipr_softc *sc = &ipr_softc[unit];
 886         struct mbuf *m;
 887 #ifdef IPR_VJ
 888 #ifdef IPR_VJ_USEBUFFER
 889         u_char *cp = sc->sc_cbuf;
 890 #endif
 891         int len, c;
 892 #endif
 893         static const uint32_t af = AF_INET;
 894
 895         if((m = *isdn_linktab[unit]->rx_mbuf) == NULL)
 896                 return;
 897
 898         m->m_pkthdr.rcvif = &sc->sc_if;
 899
 900         m->m_pkthdr.len = m->m_len;
 901
 902         microtime(&sc->sc_if.if_lastchange);
 903
 904 #ifdef I4BIPRADJFRXP
 905
 906         /*
 907          * The very first packet after the B channel is switched thru
 908          * has very often several bytes of random data prepended. This
 909          * routine looks where the IP header starts and removes the
 910          * the bad data.
 911          */
 912
 913         if(sc->sc_first_pkt)
 914         {
 915                 unsigned char *mp = m->m_data;
 916                 int i;
 917
 918                 sc->sc_first_pkt = 0;
 919
 920                 for(i = 0; i < m->m_len; i++, mp++)
 921                 {
 922                         if( ((*mp & 0xf0) == 0x40) &&
 923                             ((*mp & 0x0f) >= 0x05) )
 924                         {
 925                                 m->m_data = mp;
 926                                 m->m_pkthdr.len -= i;
 927                                 break;
 928                         }
 929                 }
 930         }
 931 #endif
 932
 933         sc->sc_if.if_ipackets++;
 934         sc->sc_if.if_ibytes += m->m_pkthdr.len;
 935
 936 #ifdef  IPR_VJ
 937         if((c = (*(mtod(m, u_char *)) & 0xf0)) != (IPVERSION << 4))
 938         {
 939                 /* copy data to buffer */
 940
 941                 len = m->m_len;
 942
 943 #ifdef IPR_VJ_USEBUFFER
 944 /* XXX */       m_copydata(m, 0, len, cp);
 945 #endif
 946
 947                 if(c & 0x80)
 948                 {
 949                         c = TYPE_COMPRESSED_TCP;
 950                 }
 951                 else if(c == TYPE_UNCOMPRESSED_TCP)
 952                 {
 953 #ifdef IPR_VJ_USEBUFFER
 954                         *cp &= 0x4f;            /* XXX */
 955 #else
 956                         *(mtod(m, u_char *)) &= 0x4f;
 957 #endif
 958                 }
 959
 960                 /*
 961                  * We've got something that's not an IP packet.
 962                  * If compression is enabled, try to decompress it.
 963                  * Otherwise, if `auto-enable' compression is on and
 964                  * it's a reasonable packet, decompress it and then
 965                  * enable compression.  Otherwise, drop it.
 966                  */
 967                 if(sc->sc_if.if_flags & IPR_COMPRESS)
 968                 {
 969 #ifdef IPR_VJ_USEBUFFER
 970                         len = sl_uncompress_tcp(&cp,len,(u_int)c,&sc->sc_compr);
 971 #else
 972                         len = sl_uncompress_tcp((u_char **)&m->m_data, len,
 973                                         (u_int)c, &sc->sc_compr);
 974 #endif
 975
 976                         if(len <= 0)
 977                         {
 978 #ifdef DEBUG_IPR_VJ
 979                                 printf("i4b_ipr, ipr_rx_data_rdy: len <= 0 IPR_COMPRESS!\n");
 980 #endif
 981                                 goto error;
 982                         }
 983                 }
 984                 else if((sc->sc_if.if_flags & IPR_AUTOCOMP) &&
 985                         (c == TYPE_UNCOMPRESSED_TCP) && (len >= 40))
 986                 {
 987 #ifdef IPR_VJ_USEBUFFER
 988                         len = sl_uncompress_tcp(&cp,len,(u_int)c,&sc->sc_compr);
 989 #else
 990                         len = sl_uncompress_tcp((u_char **)&m->m_data, len,
 991                                         (u_int)c, &sc->sc_compr);
 992 #endif
 993
 994                         if(len <= 0)
 995                         {
 996 #ifdef DEBUG_IPR_VJ
 997                                 printf("i4b_ipr, ipr_rx_data_rdy: len <= 0 IPR_AUTOCOMP!\n");
 998 #endif
 999                                 goto error;
1000                         }
1001
1002                         sc->sc_if.if_flags |= IPR_COMPRESS;
1003                 }
1004                 else
1005                 {
1006 #ifdef DEBUG_IPR_VJ
1007                         printf("i4b_ipr, ipr_input: invalid ip packet!\n");
1008 #endif
1009
1010 error:
1011                         sc->sc_if.if_ierrors++;
1012                         sc->sc_if.if_collisions++;
1013                         m_freem(m);
1014                         return;
1015                 }
1016 #ifdef IPR_VJ_USEBUFFER
1017 /* XXX */       m_copyback(m, 0, len, cp);
1018 #else
1019                 m->m_len = m->m_pkthdr.len = len;
1020 #endif
1021         }
1022 #endif
1023
1024 #if I4BIPRACCT
1025         /* NB. do the accounting after decompression!           */
1026         sc->sc_inb += m->m_pkthdr.len;
1027 #endif
1028 #if IPR_LOG
1029         if(sc->sc_log_first > 0)
1030         {
1031                 --(sc->sc_log_first);
1032                 i4b_l4_packet_ind(BDRV_IPR, unit, 0, m );
1033         }
1034 #endif
1035
1036         if (sc->sc_if.if_bpf)
1037                 bpf_ptap(sc->sc_if.if_bpf, m, &af, sizeof(af));
1038
1039 #if defined(__DragonFly__) || defined (__FreeBSD__)
1040         if (netisr_queue(NETISR_IP, m)) {
1041                 NDBGL4(L4_IPRDBG, "ipr%d: ipintrq full!", unit);
1042                 sc->sc_if.if_ierrors++;
1043                 sc->sc_if.if_iqdrops++;
1044         }
1045 #endif
1046 }
1047
1048 /*---------------------------------------------------------------------------*
1049  *      this routine is called from the HSCX interrupt handler
1050  *      when the last frame has been sent out and there is no
1051  *      further frame (mbuf) in the tx queue.
1052  *---------------------------------------------------------------------------*/
1053 static void
1054 ipr_tx_queue_empty(int unit)
1055 {
1056         static const uint32_t af = AF_INET;
1057         struct ipr_softc *sc = &ipr_softc[unit];
1058         struct mbuf *m;
1059 #ifdef  IPR_VJ
1060         struct ip *ip;
1061 #endif
1062         int x = 0;
1063
1064         if(sc->sc_state != ST_CONNECTED_A)
1065                 return;
1066
1067         for(;;)
1068         {
1069                 IF_DEQUEUE(&sc->sc_fastq, m);
1070                 if(m)
1071                 {
1072                         sc->sc_if.if_omcasts++;
1073                 }
1074                 else
1075                 {
1076                         IF_DEQUEUE(&sc->sc_if.if_snd, m);
1077                         if(m == NULL)
1078                                 break;
1079                 }
1080
1081                 microtime(&sc->sc_if.if_lastchange);
1082
1083                 if (sc->sc_if.if_bpf)
1084                         bpf_ptap(sc->sc_if.if_bpf, m, &af, sizeof(af));
1085
1086 #if I4BIPRACCT
1087                 sc->sc_outb += m->m_pkthdr.len; /* size before compression */
1088 #endif
1089
1090 #ifdef  IPR_VJ
1091                 if((ip = mtod(m, struct ip *))->ip_p == IPPROTO_TCP)
1092                 {
1093                         if(sc->sc_if.if_flags & IPR_COMPRESS)
1094                         {
1095                                 *mtod(m, u_char *) |= sl_compress_tcp(m, ip,
1096                                         &sc->sc_compr, 1);
1097                         }
1098                 }
1099 #endif
1100                 x = 1;
1101
1102                 if(IF_QFULL(isdn_linktab[unit]->tx_queue))
1103                 {
1104                         NDBGL4(L4_IPRDBG, "ipr%d: tx queue full!", unit);
1105                         m_freem(m);
1106                 }
1107                 else
1108                 {
1109                         sc->sc_if.if_obytes += m->m_pkthdr.len;
1110
1111                         sc->sc_if.if_opackets++;
1112
1113                         IF_ENQUEUE(isdn_linktab[unit]->tx_queue, m);
1114
1115                 }
1116         }
1117
1118         if(x)
1119                 (*isdn_linktab[unit]->bch_tx_start)(isdn_linktab[unit]->unit, isdn_linktab[unit]->channel);
1120 }
1121
1122 /*---------------------------------------------------------------------------*
1123  *      this routine is called from the HSCX interrupt handler
1124  *      each time a packet is received or transmitted. It should
1125  *      be used to implement an activity timeout mechanism.
1126  *---------------------------------------------------------------------------*/
1127 static void
1128 ipr_activity(int unit, int rxtx)
1129 {
1130         ipr_softc[unit].sc_cdp->last_active_time = SECOND;
1131 }
1132
1133 /*---------------------------------------------------------------------------*
1134  *      return this drivers linktab address
1135  *---------------------------------------------------------------------------*/
1136 drvr_link_t *
1137 ipr_ret_linktab(int unit)
1138 {
1139         return(&ipr_drvr_linktab[unit]);
1140 }
1141
1142 /*---------------------------------------------------------------------------*
1143  *      setup the isdn_linktab for this driver
1144  *---------------------------------------------------------------------------*/
1145 void
1146 ipr_set_linktab(int unit, isdn_link_t *ilt)
1147 {
1148         isdn_linktab[unit] = ilt;
1149 }
1150
1151 /*---------------------------------------------------------------------------*
1152  *      initialize this drivers linktab
1153  *---------------------------------------------------------------------------*/
1154 static void
1155 ipr_init_linktab(int unit)
1156 {
1157         ipr_drvr_linktab[unit].unit = unit;
1158         ipr_drvr_linktab[unit].bch_rx_data_ready = ipr_rx_data_rdy;
1159         ipr_drvr_linktab[unit].bch_tx_queue_empty = ipr_tx_queue_empty;
1160         ipr_drvr_linktab[unit].bch_activity = ipr_activity;
1161         ipr_drvr_linktab[unit].line_connected = ipr_connect;
1162         ipr_drvr_linktab[unit].line_disconnected = ipr_disconnect;
1163         ipr_drvr_linktab[unit].dial_response = ipr_dialresponse;
1164         ipr_drvr_linktab[unit].updown_ind = ipr_updown;
1165 }
1166
1167 /*===========================================================================*/
1168
1169 #endif /* NI4BIPR > 0 */