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 1.9 2004/01/06 03:17:26 dillon 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 #ifdef __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(__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(__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 #ifdef __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 #ifndef __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 #if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
 200         struct callout  sc_callout;
 201 #endif
 202 #if defined(__FreeBSD__)
 203         struct callout_handle   sc_callout;
 204 #endif
 205
 206 #ifdef I4BIPRADJFRXP
 207         int             sc_first_pkt;   /* flag, first rxd packet       */
 208 #endif
 209 #if IPR_LOG
 210         int             sc_log_first;   /* log first n packets          */
 211 #endif
 212
 213 #ifdef IPR_VJ
 214         struct slcompress sc_compr;     /* tcp compression data         */
 215 #ifdef IPR_VJ_USEBUFFER
 216         u_char          *sc_cbuf;       /* tcp decompression buffer     */
 217 #endif
 218 #endif
 219
 220 } ipr_softc[NI4BIPR];
 221
 222 enum ipr_states {
 223         ST_IDLE,                        /* initialized, ready, idle     */
 224         ST_DIALING,                     /* dialling out to remote       */
 225         ST_CONNECTED_W,                 /* connected to remote          */
 226         ST_CONNECTED_A,                 /* connected to remote          */
 227 };
 228
 229 #if (defined(__FreeBSD__) && !defined(__DragonFly__)) || (defined(__bsdi__))
 230 #define THE_UNIT        sc->sc_if.if_unit
 231 #else
 232 #define THE_UNIT        sc->sc_unit
 233 #endif
 234
 235 #if defined __FreeBSD__ || defined __NetBSD__
 236 #  define IOCTL_CMD_T u_long
 237 #else
 238 #  define IOCTL_CMD_T int
 239 #endif
 240
 241 #ifdef __FreeBSD__
 242 PDEVSTATIC void i4biprattach(void *);
 243 PSEUDO_SET(i4biprattach, i4b_ipr);
 244 static int i4biprioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, caddr_t data);
 245 #else
 246 PDEVSTATIC void i4biprattach (void);
 247 static int i4biprioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
 248 #endif
 249
 250 #ifdef __bsdi__
 251 static int iprwatchdog(int unit);
 252 #else
 253 static void iprwatchdog(struct ifnet *ifp);
 254 #endif
 255 static void ipr_init_linktab(int unit);
 256 static void ipr_tx_queue_empty(int unit);
 257 static int i4biproutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, struct rtentry *rtp);
 258 static void iprclearqueues(struct ipr_softc *sc);
 259
 260 /*===========================================================================*
 261  *                      DEVICE DRIVER ROUTINES
 262  *===========================================================================*/
 263
 264 /*---------------------------------------------------------------------------*
 265  *      interface attach routine at kernel boot time
 266  *---------------------------------------------------------------------------*/
 267 PDEVSTATIC void
 268 #ifdef __FreeBSD__
 269 i4biprattach(void *dummy)
 270 #else
 271 i4biprattach()
 272 #endif
 273 {
 274         struct ipr_softc *sc = ipr_softc;
 275         int i;
 276
 277 #ifdef IPR_VJ
 278         printf("i4bipr: %d IP over raw HDLC ISDN device(s) attached (VJ header compression)\n", NI4BIPR);
 279 #else
 280         printf("i4bipr: %d IP over raw HDLC ISDN device(s) attached\n", NI4BIPR);
 281 #endif
 282
 283         for(i=0; i < NI4BIPR; sc++, i++)
 284         {
 285                 ipr_init_linktab(i);
 286
 287                 NDBGL4(L4_DIALST, "setting dial state to ST_IDLE");
 288
 289                 sc->sc_state = ST_IDLE;
 290
 291 #ifdef __DragonFly__
 292                 if_initname(&(sc->sc_if), "ipr", i);
 293 #elif defined(__FreeBSD__)
 294                 sc->sc_if.if_name = "ipr";
 295                 sc->sc_if.if_unit = i;
 296 #elif defined(__bsdi__)
 297                 sc->sc_if.if_name = "ipr";
 298                 sc->sc_if.if_unit = i;
 299 #else
 300                 sprintf(sc->sc_if.if_xname, "ipr%d", i);
 301                 sc->sc_if.if_softc = sc;
 302                 sc->sc_unit = i;
 303 #endif
 304
 305 #ifdef  IPR_VJ
 306                 sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_SIMPLEX | IPR_AUTOCOMP;
 307 #else
 308                 sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_SIMPLEX;
 309 #endif
 310
 311 #if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
 312                 callout_init(&sc->sc_callout);
 313 #endif
 314
 315                 sc->sc_if.if_mtu = I4BIPRMTU;
 316                 sc->sc_if.if_type = IFT_ISDNBASIC;
 317                 sc->sc_if.if_ioctl = i4biprioctl;
 318                 sc->sc_if.if_output = i4biproutput;
 319
 320                 sc->sc_if.if_snd.ifq_maxlen = I4BIPRMAXQLEN;
 321                 sc->sc_fastq.ifq_maxlen = I4BIPRMAXQLEN;
 322
 323 #if defined (__FreeBSD__) && __FreeBSD__ > 4
 324                 mtx_init(&sc->sc_fastq.ifq_mtx, "i4b_ipr_fastq", MTX_DEF);
 325 #endif
 326                 sc->sc_if.if_ipackets = 0;
 327                 sc->sc_if.if_ierrors = 0;
 328                 sc->sc_if.if_opackets = 0;
 329                 sc->sc_if.if_oerrors = 0;
 330                 sc->sc_if.if_collisions = 0;
 331                 sc->sc_if.if_ibytes = 0;
 332                 sc->sc_if.if_obytes = 0;
 333                 sc->sc_if.if_imcasts = 0;
 334                 sc->sc_if.if_omcasts = 0;
 335                 sc->sc_if.if_iqdrops = 0;
 336                 sc->sc_if.if_noproto = 0;
 337
 338 #if I4BIPRACCT
 339                 sc->sc_if.if_timer = 0;
 340                 sc->sc_if.if_watchdog = iprwatchdog;
 341                 sc->sc_iinb = 0;
 342                 sc->sc_ioutb = 0;
 343                 sc->sc_inb = 0;
 344                 sc->sc_outb = 0;
 345                 sc->sc_linb = 0;
 346                 sc->sc_loutb = 0;
 347                 sc->sc_fn = 1;
 348 #endif
 349 #if IPR_LOG
 350                 sc->sc_log_first = IPR_LOG;
 351 #endif
 352
 353 #ifdef  IPR_VJ
 354 #ifdef __FreeBSD__
 355                 sl_compress_init(&sc->sc_compr, -1);
 356 #else
 357                 sl_compress_init(&sc->sc_compr);
 358 #endif
 359
 360 #ifdef IPR_VJ_USEBUFFER
 361                 if(!((sc->sc_cbuf =
 362                    (u_char *)malloc(I4BIPRMAXMTU+128, M_DEVBUF, M_WAITOK))))
 363                 {
 364                         panic("if_ipr.c, ipr_attach: VJ malloc failed");
 365                 }
 366 #endif
 367 #endif
 368                 sc->sc_updown = SOFT_ENA;       /* soft enabled */
 369                 sc->sc_dialresp = DSTAT_NONE;   /* no response */
 370                 sc->sc_lastdialresp = DSTAT_NONE;
 371
 372                 if_attach(&sc->sc_if);
 373
 374 #if NBPFILTER > 0 || NBPF > 0
 375 #ifdef __FreeBSD__
 376                 bpfattach(&sc->sc_if, DLT_NULL, sizeof(u_int));
 377 #else
 378                 bpfattach(&sc->sc_if.if_bpf, &sc->sc_if, DLT_NULL, sizeof(u_int));
 379 #endif
 380 #endif
 381         }
 382 }
 383
 384 /*---------------------------------------------------------------------------*
 385  *      output a packet to the ISDN B-channel
 386  *---------------------------------------------------------------------------*/
 387 static int
 388 i4biproutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
 389          struct rtentry *rtp)
 390 {
 391         struct ipr_softc *sc;
 392         int unit;
 393         int s;
 394         struct ifqueue *ifq;
 395         struct ip *ip;
 396
 397         s = SPLI4B();
 398
 399 #if (defined(__FreeBSD__) && !defined(__DragonFly__)) || (defined(__bsdi__))
 400         unit = ifp->if_unit;
 401         sc = &ipr_softc[unit];
 402 #else
 403         sc = ifp->if_softc;
 404         unit = sc->sc_unit;
 405 #endif
 406
 407         /* check for IP */
 408
 409         if(dst->sa_family != AF_INET)
 410         {
 411                 printf(IPR_FMT "af%d not supported\n", IPR_ARG(sc), dst->sa_family);
 412                 m_freem(m);
 413                 splx(s);
 414                 sc->sc_if.if_noproto++;
 415                 sc->sc_if.if_oerrors++;
 416                 return(EAFNOSUPPORT);
 417         }
 418
 419         /* check interface state = UP */
 420
 421         if(!(ifp->if_flags & IFF_UP))
 422         {
 423                 NDBGL4(L4_IPRDBG, "ipr%d: interface is DOWN!", unit);
 424                 m_freem(m);
 425                 splx(s);
 426                 sc->sc_if.if_oerrors++;
 427                 return(ENETDOWN);
 428         }
 429
 430         /* dial if necessary */
 431
 432         if(sc->sc_state == ST_IDLE || sc->sc_state == ST_DIALING)
 433         {
 434
 435 #ifdef NOTDEF
 436                 switch(sc->sc_dialresp)
 437                 {
 438                         case DSTAT_TFAIL:       /* transient failure */
 439                                 NDBGL4(L4_IPRDBG, "ipr%d: transient dial failure!", unit);
 440                                 m_freem(m);
 441                                 iprclearqueues(sc);
 442                                 sc->sc_dialresp = DSTAT_NONE;
 443                                 splx(s);
 444                                 sc->sc_if.if_oerrors++;
 445                                 return(ENETUNREACH);
 446                                 break;
 447
 448                         case DSTAT_PFAIL:       /* permanent failure */
 449                                 NDBGL4(L4_IPRDBG, "ipr%d: permanent dial failure!", unit);
 450                                 m_freem(m);
 451                                 iprclearqueues(sc);
 452                                 sc->sc_dialresp = DSTAT_NONE;
 453                                 splx(s);
 454                                 sc->sc_if.if_oerrors++;
 455                                 return(EHOSTUNREACH);
 456                                 break;
 457
 458                         case DSTAT_INONLY:      /* no dialout allowed*/
 459                                 NDBGL4(L4_IPRDBG, "ipr%d: dialout not allowed failure!", unit);
 460                                 m_freem(m);
 461                                 iprclearqueues(sc);
 462                                 sc->sc_dialresp = DSTAT_NONE;
 463                                 splx(s);
 464                                 sc->sc_if.if_oerrors++;
 465                                 return(EHOSTUNREACH);
 466                                 break;
 467                 }
 468 #endif
 469
 470                 NDBGL4(L4_IPRDBG, "ipr%d: send dial request message!", unit);
 471                 NDBGL4(L4_DIALST, "ipr%d: setting dial state to ST_DIALING", unit);
 472                 i4b_l4_dialout(BDRV_IPR, unit);
 473                 sc->sc_state = ST_DIALING;
 474         }
 475
 476 #if IPR_LOG
 477         if(sc->sc_log_first > 0)
 478         {
 479                 --(sc->sc_log_first);
 480                 i4b_l4_packet_ind(BDRV_IPR, unit, 1, m );
 481         }
 482 #endif
 483
 484         /* update access time */
 485
 486         microtime(&sc->sc_if.if_lastchange);
 487
 488         /*
 489          * check, if type of service indicates interactive, i.e. telnet,
 490          * traffic. in case it is interactive, put it into the fast queue,
 491          * else (i.e. ftp traffic) put it into the "normal" queue
 492          */
 493
 494         ip = mtod(m, struct ip *);              /* get ptr to ip header */
 495
 496         if(ip->ip_tos & IPTOS_LOWDELAY)
 497                 ifq = &sc->sc_fastq;
 498         else
 499                 ifq = &sc->sc_if.if_snd;
 500
 501         /* check for space in choosen send queue */
 502
 503 #if defined (__FreeBSD__)
 504         if (netisr_queue(NETISR_IP, m))
 505         {
 506                 NDBGL4(L4_IPRDBG, "ipr%d: send queue full!", unit);
 507                 splx(s);
 508                 sc->sc_if.if_oerrors++;
 509                 return(ENOBUFS);
 510         }
 511 #endif
 512
 513         NDBGL4(L4_IPRDBG, "ipr%d: add packet to send queue!", unit);
 514
 515         ipr_tx_queue_empty(unit);
 516
 517         splx(s);
 518
 519         return (0);
 520 }
 521
 522 /*---------------------------------------------------------------------------*
 523  *      process ioctl
 524  *---------------------------------------------------------------------------*/
 525 #ifdef __FreeBSD__
 526 static int
 527 i4biprioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, caddr_t data)
 528 #else
 529 static int
 530 i4biprioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
 531 #endif
 532 {
 533 #if (defined(__FreeBSD__) && !defined(__DragonFly__)) || (defined(__bsdi__))
 534         struct ipr_softc *sc = &ipr_softc[ifp->if_unit];
 535 #else
 536         struct ipr_softc *sc = ifp->if_softc;
 537 #endif
 538
 539         struct ifreq *ifr = (struct ifreq *)data;
 540         struct ifaddr *ifa = (struct ifaddr *)data;
 541         int s;
 542         int error = 0;
 543
 544         s = SPLI4B();
 545
 546         switch (cmd)
 547         {
 548                 case SIOCAIFADDR:       /* add interface address */
 549                 case SIOCSIFADDR:       /* set interface address */
 550                 case SIOCSIFDSTADDR:    /* set interface destination address */
 551                         if(ifa->ifa_addr->sa_family != AF_INET)
 552                                 error = EAFNOSUPPORT;
 553                         else
 554                                 sc->sc_if.if_flags |= IFF_UP;
 555                         microtime(&sc->sc_if.if_lastchange);
 556                         break;
 557
 558                 case SIOCSIFFLAGS:      /* set interface flags */
 559                         if(!(ifr->ifr_flags & IFF_UP))
 560                         {
 561                                 if(sc->sc_if.if_flags & IFF_RUNNING)
 562                                 {
 563                                         /* disconnect ISDN line */
 564 #if (defined(__FreeBSD__) && !defined(__DragonFly__)) || (defined(__bsdi__))
 565                                         i4b_l4_drvrdisc(BDRV_IPR, ifp->if_unit);
 566 #else
 567                                         i4b_l4_drvrdisc(BDRV_IPR, sc->sc_unit);
 568 #endif
 569                                         sc->sc_if.if_flags &= ~IFF_RUNNING;
 570                                 }
 571
 572                                 sc->sc_state = ST_IDLE;
 573
 574                                 /* empty queues */
 575
 576                                 iprclearqueues(sc);
 577                         }
 578
 579                         if(ifr->ifr_flags & IFF_DEBUG)
 580                         {
 581                                 /* enable debug messages */
 582                         }
 583
 584                         microtime(&sc->sc_if.if_lastchange);
 585                         break;
 586
 587 #if !defined(__OpenBSD__)
 588                 case SIOCSIFMTU:        /* set interface MTU */
 589                         if(ifr->ifr_mtu > I4BIPRMAXMTU)
 590                                 error = EINVAL;
 591                         else if(ifr->ifr_mtu < I4BIPRMINMTU)
 592                                 error = EINVAL;
 593                         else
 594                         {
 595                                 ifp->if_mtu = ifr->ifr_mtu;
 596                                 microtime(&sc->sc_if.if_lastchange);
 597                         }
 598                         break;
 599 #endif /* __OPENBSD__ */
 600
 601 #if 0
 602         /* not needed for FreeBSD, done in sl_compress_init() (-hm) */
 603
 604                         /* need to add an ioctl:        set VJ max slot ID
 605                          * #define IPRIOCSMAXCID        _IOW('I', XXX, int)
 606                          */
 607 #ifdef IPR_VJ
 608                 case IPRIOCSMAXCID:
 609                         {
 610                         struct thread *td = curthread;  /* XXX */
 611
 612                         if ((error = suser(td)) != 0)
 613                                 return (error);
 614                         sl_compress_setup(sc->sc_compr, *(int *)data);
 615                         }
 616                         break;
 617 #endif
 618 #endif
 619                 default:
 620                         error = EINVAL;
 621                         break;
 622         }
 623
 624         splx(s);
 625
 626         return(error);
 627 }
 628
 629 /*---------------------------------------------------------------------------*
 630  *      clear the interface's send queues
 631  *---------------------------------------------------------------------------*/
 632 static void
 633 iprclearqueues(struct ipr_softc *sc)
 634 {
 635         int x;
 636
 637 #if defined (__FreeBSD__) && __FreeBSD__ > 4
 638         x = splimp();
 639         IF_DRAIN(&sc->sc_fastq);
 640         IF_DRAIN(&sc->sc_if.if_snd);
 641         splx(x);
 642 #else
 643         struct mbuf *m;
 644
 645         for(;;)
 646         {
 647                 x = splimp();
 648                 IF_DEQUEUE(&sc->sc_fastq, m);
 649                 splx(x);
 650                 if(m)
 651                         m_freem(m);
 652                 else
 653                         break;
 654         }
 655
 656         for(;;)
 657         {
 658                 x = splimp();
 659                 IF_DEQUEUE(&sc->sc_if.if_snd, m);
 660                 splx(x);
 661                 if(m)
 662                         m_freem(m);
 663                 else
 664                         break;
 665         }
 666 #endif
 667 }
 668
 669 #if I4BIPRACCT
 670 /*---------------------------------------------------------------------------*
 671  *      watchdog routine
 672  *---------------------------------------------------------------------------*/
 673 #ifdef __bsdi__
 674 static int
 675 iprwatchdog(int unit)
 676 {
 677 #else
 678 static void
 679 iprwatchdog(struct ifnet *ifp)
 680 {
 681 #endif
 682 #if defined(__FreeBSD__) && !defined(__DragonFly__)
 683         int unit = ifp->if_unit;
 684         struct ipr_softc *sc = &ipr_softc[unit];
 685 #elif defined(__bsdi__)
 686         struct ipr_softc *sc = &ipr_softc[unit];
 687         struct ifnet *ifp = &ipr_softc[unit].sc_if;
 688 #else
 689         struct ipr_softc *sc = ifp->if_softc;
 690         int unit = sc->sc_unit;
 691 #endif
 692         bchan_statistics_t bs;
 693
 694         /* get # of bytes in and out from the HSCX driver */
 695
 696         (*isdn_linktab[unit]->bch_stat)
 697                 (isdn_linktab[unit]->unit, isdn_linktab[unit]->channel, &bs);
 698
 699         sc->sc_ioutb += bs.outbytes;
 700         sc->sc_iinb += bs.inbytes;
 701
 702         if((sc->sc_iinb != sc->sc_linb) || (sc->sc_ioutb != sc->sc_loutb) || sc->sc_fn)
 703         {
 704                 int ri = (sc->sc_iinb - sc->sc_linb)/I4BIPRACCTINTVL;
 705                 int ro = (sc->sc_ioutb - sc->sc_loutb)/I4BIPRACCTINTVL;
 706
 707                 if((sc->sc_iinb == sc->sc_linb) && (sc->sc_ioutb == sc->sc_loutb))
 708                         sc->sc_fn = 0;
 709                 else
 710                         sc->sc_fn = 1;
 711
 712                 sc->sc_linb = sc->sc_iinb;
 713                 sc->sc_loutb = sc->sc_ioutb;
 714
 715                 i4b_l4_accounting(BDRV_IPR, unit, ACCT_DURING,
 716                          sc->sc_ioutb, sc->sc_iinb, ro, ri, sc->sc_outb, sc->sc_inb);
 717         }
 718         sc->sc_if.if_timer = I4BIPRACCTINTVL;
 719 #ifdef __bsdi__
 720         return 0;
 721 #endif
 722 }
 723 #endif /* I4BIPRACCT */
 724
 725 /*===========================================================================*
 726  *                      ISDN INTERFACE ROUTINES
 727  *===========================================================================*/
 728
 729 /*---------------------------------------------------------------------------*
 730  *      start transmitting after connect
 731  *---------------------------------------------------------------------------*/
 732 static void
 733 i4bipr_connect_startio(struct ipr_softc *sc)
 734 {
 735         int s = SPLI4B();
 736
 737         if(sc->sc_state == ST_CONNECTED_W)
 738         {
 739                 sc->sc_state = ST_CONNECTED_A;
 740                 ipr_tx_queue_empty(THE_UNIT);
 741         }
 742
 743         splx(s);
 744 }
 745
 746 /*---------------------------------------------------------------------------*
 747  *      this routine is called from L4 handler at connect time
 748  *---------------------------------------------------------------------------*/
 749 static void
 750 ipr_connect(int unit, void *cdp)
 751 {
 752         struct ipr_softc *sc = &ipr_softc[unit];
 753         int s;
 754
 755         sc->sc_cdp = (call_desc_t *)cdp;
 756
 757         s = SPLI4B();
 758
 759         NDBGL4(L4_DIALST, "ipr%d: setting dial state to ST_CONNECTED", unit);
 760
 761         sc->sc_if.if_flags |= IFF_RUNNING;
 762         sc->sc_state = ST_CONNECTED_W;
 763
 764         sc->sc_dialresp = DSTAT_NONE;
 765         sc->sc_lastdialresp = DSTAT_NONE;
 766
 767 #if I4BIPRACCT
 768         sc->sc_iinb = 0;
 769         sc->sc_ioutb = 0;
 770         sc->sc_inb = 0;
 771         sc->sc_outb = 0;
 772         sc->sc_linb = 0;
 773         sc->sc_loutb = 0;
 774         sc->sc_if.if_timer = I4BIPRACCTINTVL;
 775 #endif
 776
 777 #ifdef I4BIPRADJFRXP
 778         sc->sc_first_pkt = 1;
 779 #endif
 780
 781         /*
 782          * Sometimes ISDN B-channels are switched thru asymmetic. This
 783          * means that under such circumstances B-channel data (the first
 784          * three packets of a TCP connection in my case) may get lost,
 785          * causing a large delay until the connection is started.
 786          * When the sending of the very first packet of a TCP connection
 787          * is delayed for a to be empirically determined delay (close
 788          * to a second in my case) those packets go thru and the TCP
 789          * connection comes up "almost" immediately (-hm).
 790          */
 791
 792         if(sc->sc_cdp->isdntxdelay > 0)
 793         {
 794                 int delay;
 795
 796                 if (hz == 100) {
 797                         delay = sc->sc_cdp->isdntxdelay;        /* avoid any rounding */
 798                 } else {
 799                         delay = sc->sc_cdp->isdntxdelay*hz;
 800                         delay /= 100;
 801                 }
 802
 803                 START_TIMER(sc->sc_callout, (TIMEOUT_FUNC_T)i4bipr_connect_startio, (void *)sc,  delay);
 804         }
 805         else
 806         {
 807                 sc->sc_state = ST_CONNECTED_A;
 808                 ipr_tx_queue_empty(unit);
 809         }
 810
 811         splx(s);
 812
 813         /* we don't need any negotiation - pass event back right now */
 814         i4b_l4_negcomplete(sc->sc_cdp);
 815 }
 816
 817 /*---------------------------------------------------------------------------*
 818  *      this routine is called from L4 handler at disconnect time
 819  *---------------------------------------------------------------------------*/
 820 static void
 821 ipr_disconnect(int unit, void *cdp)
 822 {
 823         call_desc_t *cd = (call_desc_t *)cdp;
 824         struct ipr_softc *sc = &ipr_softc[unit];
 825
 826         /* new stuff to check that the active channel is being closed */
 827
 828         if (cd != sc->sc_cdp)
 829         {
 830                 NDBGL4(L4_IPRDBG, "ipr%d: channel %d not active",
 831                                 cd->driver_unit, cd->channelid);
 832                 return;
 833         }
 834
 835 #if I4BIPRACCT
 836         sc->sc_if.if_timer = 0;
 837 #endif
 838 #if IPR_LOG
 839         /* show next IPR_LOG packets again */
 840         sc->sc_log_first = IPR_LOG;
 841 #endif
 842
 843         i4b_l4_accounting(BDRV_IPR, cd->driver_unit, ACCT_FINAL,
 844                  sc->sc_ioutb, sc->sc_iinb, 0, 0, sc->sc_outb, sc->sc_inb);
 845
 846         sc->sc_cdp = (call_desc_t *)0;
 847
 848         NDBGL4(L4_DIALST, "setting dial state to ST_IDLE");
 849
 850         sc->sc_dialresp = DSTAT_NONE;
 851         sc->sc_lastdialresp = DSTAT_NONE;
 852
 853         sc->sc_if.if_flags &= ~IFF_RUNNING;
 854         sc->sc_state = ST_IDLE;
 855 }
 856
 857 /*---------------------------------------------------------------------------*
 858  *      this routine is used to give a feedback from userland daemon
 859  *      in case of dial problems
 860  *---------------------------------------------------------------------------*/
 861 static void
 862 ipr_dialresponse(int unit, int status, cause_t cause)
 863 {
 864         struct ipr_softc *sc = &ipr_softc[unit];
 865         sc->sc_dialresp = status;
 866
 867         NDBGL4(L4_IPRDBG, "ipr%d: last=%d, this=%d",
 868                 unit, sc->sc_lastdialresp, sc->sc_dialresp);
 869
 870         if(status != DSTAT_NONE)
 871         {
 872                 NDBGL4(L4_IPRDBG, "ipr%d: clearing queues", unit);
 873                 iprclearqueues(sc);
 874         }
 875 }
 876
 877 /*---------------------------------------------------------------------------*
 878  *      interface soft up/down
 879  *---------------------------------------------------------------------------*/
 880 static void
 881 ipr_updown(int unit, int updown)
 882 {
 883         struct ipr_softc *sc = &ipr_softc[unit];
 884         sc->sc_updown = updown;
 885 }
 886
 887 /*---------------------------------------------------------------------------*
 888  *      this routine is called from the HSCX interrupt handler
 889  *      when a new frame (mbuf) has been received and was put on
 890  *      the rx queue. It is assumed that this routines runs at
 891  *      pri level splimp() ! Keep it short !
 892  *---------------------------------------------------------------------------*/
 893 static void
 894 ipr_rx_data_rdy(int unit)
 895 {
 896         struct ipr_softc *sc = &ipr_softc[unit];
 897         struct mbuf *m;
 898 #ifdef IPR_VJ
 899 #ifdef IPR_VJ_USEBUFFER
 900         u_char *cp = sc->sc_cbuf;
 901 #endif
 902         int len, c;
 903 #endif
 904
 905         if((m = *isdn_linktab[unit]->rx_mbuf) == NULL)
 906                 return;
 907
 908         m->m_pkthdr.rcvif = &sc->sc_if;
 909
 910         m->m_pkthdr.len = m->m_len;
 911
 912         microtime(&sc->sc_if.if_lastchange);
 913
 914 #ifdef I4BIPRADJFRXP
 915
 916         /*
 917          * The very first packet after the B channel is switched thru
 918          * has very often several bytes of random data prepended. This
 919          * routine looks where the IP header starts and removes the
 920          * the bad data.
 921          */
 922
 923         if(sc->sc_first_pkt)
 924         {
 925                 unsigned char *mp = m->m_data;
 926                 int i;
 927
 928                 sc->sc_first_pkt = 0;
 929
 930                 for(i = 0; i < m->m_len; i++, mp++)
 931                 {
 932                         if( ((*mp & 0xf0) == 0x40) &&
 933                             ((*mp & 0x0f) >= 0x05) )
 934                         {
 935                                 m->m_data = mp;
 936                                 m->m_pkthdr.len -= i;
 937                                 break;
 938                         }
 939                 }
 940         }
 941 #endif
 942
 943         sc->sc_if.if_ipackets++;
 944         sc->sc_if.if_ibytes += m->m_pkthdr.len;
 945
 946 #ifdef  IPR_VJ
 947         if((c = (*(mtod(m, u_char *)) & 0xf0)) != (IPVERSION << 4))
 948         {
 949                 /* copy data to buffer */
 950
 951                 len = m->m_len;
 952
 953 #ifdef IPR_VJ_USEBUFFER
 954 /* XXX */       m_copydata(m, 0, len, cp);
 955 #endif
 956
 957                 if(c & 0x80)
 958                 {
 959                         c = TYPE_COMPRESSED_TCP;
 960                 }
 961                 else if(c == TYPE_UNCOMPRESSED_TCP)
 962                 {
 963 #ifdef IPR_VJ_USEBUFFER
 964                         *cp &= 0x4f;            /* XXX */
 965 #else
 966                         *(mtod(m, u_char *)) &= 0x4f;
 967 #endif
 968                 }
 969
 970                 /*
 971                  * We've got something that's not an IP packet.
 972                  * If compression is enabled, try to decompress it.
 973                  * Otherwise, if `auto-enable' compression is on and
 974                  * it's a reasonable packet, decompress it and then
 975                  * enable compression.  Otherwise, drop it.
 976                  */
 977                 if(sc->sc_if.if_flags & IPR_COMPRESS)
 978                 {
 979 #ifdef IPR_VJ_USEBUFFER
 980                         len = sl_uncompress_tcp(&cp,len,(u_int)c,&sc->sc_compr);
 981 #else
 982                         len = sl_uncompress_tcp((u_char **)&m->m_data, len,
 983                                         (u_int)c, &sc->sc_compr);
 984 #endif
 985
 986                         if(len <= 0)
 987                         {
 988 #ifdef DEBUG_IPR_VJ
 989                                 printf("i4b_ipr, ipr_rx_data_rdy: len <= 0 IPR_COMPRESS!\n");
 990 #endif
 991                                 goto error;
 992                         }
 993                 }
 994                 else if((sc->sc_if.if_flags & IPR_AUTOCOMP) &&
 995                         (c == TYPE_UNCOMPRESSED_TCP) && (len >= 40))
 996                 {
 997 #ifdef IPR_VJ_USEBUFFER
 998                         len = sl_uncompress_tcp(&cp,len,(u_int)c,&sc->sc_compr);
 999 #else
1000                         len = sl_uncompress_tcp((u_char **)&m->m_data, len,
1001                                         (u_int)c, &sc->sc_compr);
1002 #endif
1003
1004                         if(len <= 0)
1005                         {
1006 #ifdef DEBUG_IPR_VJ
1007                                 printf("i4b_ipr, ipr_rx_data_rdy: len <= 0 IPR_AUTOCOMP!\n");
1008 #endif
1009                                 goto error;
1010                         }
1011
1012                         sc->sc_if.if_flags |= IPR_COMPRESS;
1013                 }
1014                 else
1015                 {
1016 #ifdef DEBUG_IPR_VJ
1017                         printf("i4b_ipr, ipr_input: invalid ip packet!\n");
1018 #endif
1019
1020 error:
1021                         sc->sc_if.if_ierrors++;
1022                         sc->sc_if.if_collisions++;
1023                         m_freem(m);
1024                         return;
1025                 }
1026 #ifdef IPR_VJ_USEBUFFER
1027 /* XXX */       m_copyback(m, 0, len, cp);
1028 #else
1029                 m->m_len = m->m_pkthdr.len = len;
1030 #endif
1031         }
1032 #endif
1033
1034 #if I4BIPRACCT
1035         /* NB. do the accounting after decompression!           */
1036         sc->sc_inb += m->m_pkthdr.len;
1037 #endif
1038 #if IPR_LOG
1039         if(sc->sc_log_first > 0)
1040         {
1041                 --(sc->sc_log_first);
1042                 i4b_l4_packet_ind(BDRV_IPR, unit, 0, m );
1043         }
1044 #endif
1045
1046 #if NBPFILTER > 0 || NBPF > 0
1047         if(sc->sc_if.if_bpf)
1048         {
1049                 /* prepend the address family as a four byte field */
1050                 struct mbuf mm;
1051                 u_int af = AF_INET;
1052                 mm.m_next = m;
1053                 mm.m_len = 4;
1054                 mm.m_data = (char *)&af;
1055
1056 #ifdef __FreeBSD__
1057                 bpf_mtap(&sc->sc_if, &mm);
1058 #else
1059                 bpf_mtap(sc->sc_if.if_bpf, &mm);
1060 #endif
1061         }
1062 #endif /* NBPFILTER > 0  || NBPF > 0 */
1063
1064 #if defined (__FreeBSD__)
1065         if (netisr_queue(NETISR_IP, m)) {
1066                 NDBGL4(L4_IPRDBG, "ipr%d: ipintrq full!", unit);
1067                 sc->sc_if.if_ierrors++;
1068                 sc->sc_if.if_iqdrops++;
1069         }
1070 #endif
1071 }
1072
1073 /*---------------------------------------------------------------------------*
1074  *      this routine is called from the HSCX interrupt handler
1075  *      when the last frame has been sent out and there is no
1076  *      further frame (mbuf) in the tx queue.
1077  *---------------------------------------------------------------------------*/
1078 static void
1079 ipr_tx_queue_empty(int unit)
1080 {
1081         struct ipr_softc *sc = &ipr_softc[unit];
1082         struct mbuf *m;
1083 #ifdef  IPR_VJ
1084         struct ip *ip;
1085 #endif
1086         int x = 0;
1087
1088         if(sc->sc_state != ST_CONNECTED_A)
1089                 return;
1090
1091         for(;;)
1092         {
1093                 IF_DEQUEUE(&sc->sc_fastq, m);
1094                 if(m)
1095                 {
1096                         sc->sc_if.if_omcasts++;
1097                 }
1098                 else
1099                 {
1100                         IF_DEQUEUE(&sc->sc_if.if_snd, m);
1101                         if(m == NULL)
1102                                 break;
1103                 }
1104
1105                 microtime(&sc->sc_if.if_lastchange);
1106
1107 #if NBPFILTER > 0 || NBPF > 0
1108                 if(sc->sc_if.if_bpf)
1109                 {
1110                         /* prepend the address family as a four byte field */
1111
1112                         struct mbuf mm;
1113                         u_int af = AF_INET;
1114                         mm.m_next = m;
1115                         mm.m_len = 4;
1116                         mm.m_data = (char *)&af;
1117
1118 #ifdef __FreeBSD__
1119                         bpf_mtap(&sc->sc_if, &mm);
1120 #else
1121                         bpf_mtap(sc->sc_if.if_bpf, &mm);
1122 #endif
1123                 }
1124 #endif /* NBPFILTER */
1125
1126 #if I4BIPRACCT
1127                 sc->sc_outb += m->m_pkthdr.len; /* size before compression */
1128 #endif
1129
1130 #ifdef  IPR_VJ
1131                 if((ip = mtod(m, struct ip *))->ip_p == IPPROTO_TCP)
1132                 {
1133                         if(sc->sc_if.if_flags & IPR_COMPRESS)
1134                         {
1135                                 *mtod(m, u_char *) |= sl_compress_tcp(m, ip,
1136                                         &sc->sc_compr, 1);
1137                         }
1138                 }
1139 #endif
1140                 x = 1;
1141
1142                 IF_LOCK(isdn_linktab[unit]->tx_queue);
1143                 if(_IF_QFULL(isdn_linktab[unit]->tx_queue))
1144                 {
1145                         NDBGL4(L4_IPRDBG, "ipr%d: tx queue full!", unit);
1146                         m_freem(m);
1147                 }
1148                 else
1149                 {
1150                         sc->sc_if.if_obytes += m->m_pkthdr.len;
1151
1152                         sc->sc_if.if_opackets++;
1153
1154                         _IF_ENQUEUE(isdn_linktab[unit]->tx_queue, m);
1155
1156                 }
1157                 IF_UNLOCK(isdn_linktab[unit]->tx_queue);
1158         }
1159
1160         if(x)
1161                 (*isdn_linktab[unit]->bch_tx_start)(isdn_linktab[unit]->unit, isdn_linktab[unit]->channel);
1162 }
1163
1164 /*---------------------------------------------------------------------------*
1165  *      this routine is called from the HSCX interrupt handler
1166  *      each time a packet is received or transmitted. It should
1167  *      be used to implement an activity timeout mechanism.
1168  *---------------------------------------------------------------------------*/
1169 static void
1170 ipr_activity(int unit, int rxtx)
1171 {
1172         ipr_softc[unit].sc_cdp->last_active_time = SECOND;
1173 }
1174
1175 /*---------------------------------------------------------------------------*
1176  *      return this drivers linktab address
1177  *---------------------------------------------------------------------------*/
1178 drvr_link_t *
1179 ipr_ret_linktab(int unit)
1180 {
1181         return(&ipr_drvr_linktab[unit]);
1182 }
1183
1184 /*---------------------------------------------------------------------------*
1185  *      setup the isdn_linktab for this driver
1186  *---------------------------------------------------------------------------*/
1187 void
1188 ipr_set_linktab(int unit, isdn_link_t *ilt)
1189 {
1190         isdn_linktab[unit] = ilt;
1191 }
1192
1193 /*---------------------------------------------------------------------------*
1194  *      initialize this drivers linktab
1195  *---------------------------------------------------------------------------*/
1196 static void
1197 ipr_init_linktab(int unit)
1198 {
1199         ipr_drvr_linktab[unit].unit = unit;
1200         ipr_drvr_linktab[unit].bch_rx_data_ready = ipr_rx_data_rdy;
1201         ipr_drvr_linktab[unit].bch_tx_queue_empty = ipr_tx_queue_empty;
1202         ipr_drvr_linktab[unit].bch_activity = ipr_activity;
1203         ipr_drvr_linktab[unit].line_connected = ipr_connect;
1204         ipr_drvr_linktab[unit].line_disconnected = ipr_disconnect;
1205         ipr_drvr_linktab[unit].dial_response = ipr_dialresponse;
1206         ipr_drvr_linktab[unit].updown_ind = ipr_updown;
1207 }
1208
1209 /*===========================================================================*/
1210
1211 #endif /* NI4BIPR > 0 */