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 1.8 2003/09/15 23:38:13 hsu 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 #ifdef __FreeBSD__
 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 #ifndef __FreeBSD__
 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(__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 __FreeBSD__
 292                 sc->sc_if.if_name = "ipr";
 293                 sc->sc_if.if_unit = i;
 294 #elif defined(__bsdi__)
 295                 sc->sc_if.if_name = "ipr";
 296                 sc->sc_if.if_unit = i;
 297 #else
 298                 sprintf(sc->sc_if.if_xname, "ipr%d", i);
 299                 sc->sc_if.if_softc = sc;
 300                 sc->sc_unit = i;
 301 #endif
 302
 303 #ifdef  IPR_VJ
 304                 sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_SIMPLEX | IPR_AUTOCOMP;
 305 #else
 306                 sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_SIMPLEX;
 307 #endif
 308
 309 #if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
 310                 callout_init(&sc->sc_callout);
 311 #endif
 312
 313                 sc->sc_if.if_mtu = I4BIPRMTU;
 314                 sc->sc_if.if_type = IFT_ISDNBASIC;
 315                 sc->sc_if.if_ioctl = i4biprioctl;
 316                 sc->sc_if.if_output = i4biproutput;
 317
 318                 sc->sc_if.if_snd.ifq_maxlen = I4BIPRMAXQLEN;
 319                 sc->sc_fastq.ifq_maxlen = I4BIPRMAXQLEN;
 320
 321 #if defined (__FreeBSD__) && __FreeBSD__ > 4
 322                 mtx_init(&sc->sc_fastq.ifq_mtx, "i4b_ipr_fastq", MTX_DEF);
 323 #endif
 324                 sc->sc_if.if_ipackets = 0;
 325                 sc->sc_if.if_ierrors = 0;
 326                 sc->sc_if.if_opackets = 0;
 327                 sc->sc_if.if_oerrors = 0;
 328                 sc->sc_if.if_collisions = 0;
 329                 sc->sc_if.if_ibytes = 0;
 330                 sc->sc_if.if_obytes = 0;
 331                 sc->sc_if.if_imcasts = 0;
 332                 sc->sc_if.if_omcasts = 0;
 333                 sc->sc_if.if_iqdrops = 0;
 334                 sc->sc_if.if_noproto = 0;
 335
 336 #if I4BIPRACCT
 337                 sc->sc_if.if_timer = 0;
 338                 sc->sc_if.if_watchdog = iprwatchdog;
 339                 sc->sc_iinb = 0;
 340                 sc->sc_ioutb = 0;
 341                 sc->sc_inb = 0;
 342                 sc->sc_outb = 0;
 343                 sc->sc_linb = 0;
 344                 sc->sc_loutb = 0;
 345                 sc->sc_fn = 1;
 346 #endif
 347 #if IPR_LOG
 348                 sc->sc_log_first = IPR_LOG;
 349 #endif
 350
 351 #ifdef  IPR_VJ
 352 #ifdef __FreeBSD__
 353                 sl_compress_init(&sc->sc_compr, -1);
 354 #else
 355                 sl_compress_init(&sc->sc_compr);
 356 #endif
 357
 358 #ifdef IPR_VJ_USEBUFFER
 359                 if(!((sc->sc_cbuf =
 360                    (u_char *)malloc(I4BIPRMAXMTU+128, M_DEVBUF, M_WAITOK))))
 361                 {
 362                         panic("if_ipr.c, ipr_attach: VJ malloc failed");
 363                 }
 364 #endif
 365 #endif
 366                 sc->sc_updown = SOFT_ENA;       /* soft enabled */
 367                 sc->sc_dialresp = DSTAT_NONE;   /* no response */
 368                 sc->sc_lastdialresp = DSTAT_NONE;
 369
 370                 if_attach(&sc->sc_if);
 371
 372 #if NBPFILTER > 0 || NBPF > 0
 373 #ifdef __FreeBSD__
 374                 bpfattach(&sc->sc_if, DLT_NULL, sizeof(u_int));
 375 #else
 376                 bpfattach(&sc->sc_if.if_bpf, &sc->sc_if, DLT_NULL, sizeof(u_int));
 377 #endif
 378 #endif
 379         }
 380 }
 381
 382 /*---------------------------------------------------------------------------*
 383  *      output a packet to the ISDN B-channel
 384  *---------------------------------------------------------------------------*/
 385 static int
 386 i4biproutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
 387          struct rtentry *rtp)
 388 {
 389         struct ipr_softc *sc;
 390         int unit;
 391         int s;
 392         struct ifqueue *ifq;
 393         struct ip *ip;
 394
 395         s = SPLI4B();
 396
 397 #if defined(__FreeBSD__) || defined(__bsdi__)
 398         unit = ifp->if_unit;
 399         sc = &ipr_softc[unit];
 400 #else
 401         sc = ifp->if_softc;
 402         unit = sc->sc_unit;
 403 #endif
 404
 405         /* check for IP */
 406
 407         if(dst->sa_family != AF_INET)
 408         {
 409                 printf(IPR_FMT "af%d not supported\n", IPR_ARG(sc), dst->sa_family);
 410                 m_freem(m);
 411                 splx(s);
 412                 sc->sc_if.if_noproto++;
 413                 sc->sc_if.if_oerrors++;
 414                 return(EAFNOSUPPORT);
 415         }
 416
 417         /* check interface state = UP */
 418
 419         if(!(ifp->if_flags & IFF_UP))
 420         {
 421                 NDBGL4(L4_IPRDBG, "ipr%d: interface is DOWN!", unit);
 422                 m_freem(m);
 423                 splx(s);
 424                 sc->sc_if.if_oerrors++;
 425                 return(ENETDOWN);
 426         }
 427
 428         /* dial if necessary */
 429
 430         if(sc->sc_state == ST_IDLE || sc->sc_state == ST_DIALING)
 431         {
 432
 433 #ifdef NOTDEF
 434                 switch(sc->sc_dialresp)
 435                 {
 436                         case DSTAT_TFAIL:       /* transient failure */
 437                                 NDBGL4(L4_IPRDBG, "ipr%d: transient dial failure!", unit);
 438                                 m_freem(m);
 439                                 iprclearqueues(sc);
 440                                 sc->sc_dialresp = DSTAT_NONE;
 441                                 splx(s);
 442                                 sc->sc_if.if_oerrors++;
 443                                 return(ENETUNREACH);
 444                                 break;
 445
 446                         case DSTAT_PFAIL:       /* permanent failure */
 447                                 NDBGL4(L4_IPRDBG, "ipr%d: permanent dial failure!", unit);
 448                                 m_freem(m);
 449                                 iprclearqueues(sc);
 450                                 sc->sc_dialresp = DSTAT_NONE;
 451                                 splx(s);
 452                                 sc->sc_if.if_oerrors++;
 453                                 return(EHOSTUNREACH);
 454                                 break;
 455
 456                         case DSTAT_INONLY:      /* no dialout allowed*/
 457                                 NDBGL4(L4_IPRDBG, "ipr%d: dialout not allowed failure!", unit);
 458                                 m_freem(m);
 459                                 iprclearqueues(sc);
 460                                 sc->sc_dialresp = DSTAT_NONE;
 461                                 splx(s);
 462                                 sc->sc_if.if_oerrors++;
 463                                 return(EHOSTUNREACH);
 464                                 break;
 465                 }
 466 #endif
 467
 468                 NDBGL4(L4_IPRDBG, "ipr%d: send dial request message!", unit);
 469                 NDBGL4(L4_DIALST, "ipr%d: setting dial state to ST_DIALING", unit);
 470                 i4b_l4_dialout(BDRV_IPR, unit);
 471                 sc->sc_state = ST_DIALING;
 472         }
 473
 474 #if IPR_LOG
 475         if(sc->sc_log_first > 0)
 476         {
 477                 --(sc->sc_log_first);
 478                 i4b_l4_packet_ind(BDRV_IPR, unit, 1, m );
 479         }
 480 #endif
 481
 482         /* update access time */
 483
 484         microtime(&sc->sc_if.if_lastchange);
 485
 486         /*
 487          * check, if type of service indicates interactive, i.e. telnet,
 488          * traffic. in case it is interactive, put it into the fast queue,
 489          * else (i.e. ftp traffic) put it into the "normal" queue
 490          */
 491
 492         ip = mtod(m, struct ip *);              /* get ptr to ip header */
 493
 494         if(ip->ip_tos & IPTOS_LOWDELAY)
 495                 ifq = &sc->sc_fastq;
 496         else
 497                 ifq = &sc->sc_if.if_snd;
 498
 499         /* check for space in choosen send queue */
 500
 501 #if defined (__FreeBSD__)
 502         if (netisr_queue(NETISR_IP, m))
 503         {
 504                 NDBGL4(L4_IPRDBG, "ipr%d: send queue full!", unit);
 505                 splx(s);
 506                 sc->sc_if.if_oerrors++;
 507                 return(ENOBUFS);
 508         }
 509 #endif
 510
 511         NDBGL4(L4_IPRDBG, "ipr%d: add packet to send queue!", unit);
 512
 513         ipr_tx_queue_empty(unit);
 514
 515         splx(s);
 516
 517         return (0);
 518 }
 519
 520 /*---------------------------------------------------------------------------*
 521  *      process ioctl
 522  *---------------------------------------------------------------------------*/
 523 #ifdef __FreeBSD__
 524 static int
 525 i4biprioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, caddr_t data)
 526 #else
 527 static int
 528 i4biprioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
 529 #endif
 530 {
 531 #if defined(__FreeBSD__) || defined(__bsdi__)
 532         struct ipr_softc *sc = &ipr_softc[ifp->if_unit];
 533 #else
 534         struct ipr_softc *sc = ifp->if_softc;
 535 #endif
 536
 537         struct ifreq *ifr = (struct ifreq *)data;
 538         struct ifaddr *ifa = (struct ifaddr *)data;
 539         int s;
 540         int error = 0;
 541
 542         s = SPLI4B();
 543
 544         switch (cmd)
 545         {
 546                 case SIOCAIFADDR:       /* add interface address */
 547                 case SIOCSIFADDR:       /* set interface address */
 548                 case SIOCSIFDSTADDR:    /* set interface destination address */
 549                         if(ifa->ifa_addr->sa_family != AF_INET)
 550                                 error = EAFNOSUPPORT;
 551                         else
 552                                 sc->sc_if.if_flags |= IFF_UP;
 553                         microtime(&sc->sc_if.if_lastchange);
 554                         break;
 555
 556                 case SIOCSIFFLAGS:      /* set interface flags */
 557                         if(!(ifr->ifr_flags & IFF_UP))
 558                         {
 559                                 if(sc->sc_if.if_flags & IFF_RUNNING)
 560                                 {
 561                                         /* disconnect ISDN line */
 562 #if defined(__FreeBSD__) || defined(__bsdi__)
 563                                         i4b_l4_drvrdisc(BDRV_IPR, ifp->if_unit);
 564 #else
 565                                         i4b_l4_drvrdisc(BDRV_IPR, sc->sc_unit);
 566 #endif
 567                                         sc->sc_if.if_flags &= ~IFF_RUNNING;
 568                                 }
 569
 570                                 sc->sc_state = ST_IDLE;
 571
 572                                 /* empty queues */
 573
 574                                 iprclearqueues(sc);
 575                         }
 576
 577                         if(ifr->ifr_flags & IFF_DEBUG)
 578                         {
 579                                 /* enable debug messages */
 580                         }
 581
 582                         microtime(&sc->sc_if.if_lastchange);
 583                         break;
 584
 585 #if !defined(__OpenBSD__)
 586                 case SIOCSIFMTU:        /* set interface MTU */
 587                         if(ifr->ifr_mtu > I4BIPRMAXMTU)
 588                                 error = EINVAL;
 589                         else if(ifr->ifr_mtu < I4BIPRMINMTU)
 590                                 error = EINVAL;
 591                         else
 592                         {
 593                                 ifp->if_mtu = ifr->ifr_mtu;
 594                                 microtime(&sc->sc_if.if_lastchange);
 595                         }
 596                         break;
 597 #endif /* __OPENBSD__ */
 598
 599 #if 0
 600         /* not needed for FreeBSD, done in sl_compress_init() (-hm) */
 601
 602                         /* need to add an ioctl:        set VJ max slot ID
 603                          * #define IPRIOCSMAXCID        _IOW('I', XXX, int)
 604                          */
 605 #ifdef IPR_VJ
 606                 case IPRIOCSMAXCID:
 607                         {
 608                         struct thread *td = curthread;  /* XXX */
 609
 610                         if ((error = suser(td)) != 0)
 611                                 return (error);
 612                         sl_compress_setup(sc->sc_compr, *(int *)data);
 613                         }
 614                         break;
 615 #endif
 616 #endif
 617                 default:
 618                         error = EINVAL;
 619                         break;
 620         }
 621
 622         splx(s);
 623
 624         return(error);
 625 }
 626
 627 /*---------------------------------------------------------------------------*
 628  *      clear the interface's send queues
 629  *---------------------------------------------------------------------------*/
 630 static void
 631 iprclearqueues(struct ipr_softc *sc)
 632 {
 633         int x;
 634
 635 #if defined (__FreeBSD__) && __FreeBSD__ > 4
 636         x = splimp();
 637         IF_DRAIN(&sc->sc_fastq);
 638         IF_DRAIN(&sc->sc_if.if_snd);
 639         splx(x);
 640 #else
 641         struct mbuf *m;
 642
 643         for(;;)
 644         {
 645                 x = splimp();
 646                 IF_DEQUEUE(&sc->sc_fastq, m);
 647                 splx(x);
 648                 if(m)
 649                         m_freem(m);
 650                 else
 651                         break;
 652         }
 653
 654         for(;;)
 655         {
 656                 x = splimp();
 657                 IF_DEQUEUE(&sc->sc_if.if_snd, m);
 658                 splx(x);
 659                 if(m)
 660                         m_freem(m);
 661                 else
 662                         break;
 663         }
 664 #endif
 665 }
 666
 667 #if I4BIPRACCT
 668 /*---------------------------------------------------------------------------*
 669  *      watchdog routine
 670  *---------------------------------------------------------------------------*/
 671 #ifdef __bsdi__
 672 static int
 673 iprwatchdog(int unit)
 674 {
 675 #else
 676 static void
 677 iprwatchdog(struct ifnet *ifp)
 678 {
 679 #endif
 680 #ifdef __FreeBSD__
 681         int unit = ifp->if_unit;
 682         struct ipr_softc *sc = &ipr_softc[unit];
 683 #elif defined(__bsdi__)
 684         struct ipr_softc *sc = &ipr_softc[unit];
 685         struct ifnet *ifp = &ipr_softc[unit].sc_if;
 686 #else
 687         struct ipr_softc *sc = ifp->if_softc;
 688         int unit = sc->sc_unit;
 689 #endif
 690         bchan_statistics_t bs;
 691
 692         /* get # of bytes in and out from the HSCX driver */
 693
 694         (*isdn_linktab[unit]->bch_stat)
 695                 (isdn_linktab[unit]->unit, isdn_linktab[unit]->channel, &bs);
 696
 697         sc->sc_ioutb += bs.outbytes;
 698         sc->sc_iinb += bs.inbytes;
 699
 700         if((sc->sc_iinb != sc->sc_linb) || (sc->sc_ioutb != sc->sc_loutb) || sc->sc_fn)
 701         {
 702                 int ri = (sc->sc_iinb - sc->sc_linb)/I4BIPRACCTINTVL;
 703                 int ro = (sc->sc_ioutb - sc->sc_loutb)/I4BIPRACCTINTVL;
 704
 705                 if((sc->sc_iinb == sc->sc_linb) && (sc->sc_ioutb == sc->sc_loutb))
 706                         sc->sc_fn = 0;
 707                 else
 708                         sc->sc_fn = 1;
 709
 710                 sc->sc_linb = sc->sc_iinb;
 711                 sc->sc_loutb = sc->sc_ioutb;
 712
 713                 i4b_l4_accounting(BDRV_IPR, unit, ACCT_DURING,
 714                          sc->sc_ioutb, sc->sc_iinb, ro, ri, sc->sc_outb, sc->sc_inb);
 715         }
 716         sc->sc_if.if_timer = I4BIPRACCTINTVL;
 717 #ifdef __bsdi__
 718         return 0;
 719 #endif
 720 }
 721 #endif /* I4BIPRACCT */
 722
 723 /*===========================================================================*
 724  *                      ISDN INTERFACE ROUTINES
 725  *===========================================================================*/
 726
 727 /*---------------------------------------------------------------------------*
 728  *      start transmitting after connect
 729  *---------------------------------------------------------------------------*/
 730 static void
 731 i4bipr_connect_startio(struct ipr_softc *sc)
 732 {
 733         int s = SPLI4B();
 734
 735         if(sc->sc_state == ST_CONNECTED_W)
 736         {
 737                 sc->sc_state = ST_CONNECTED_A;
 738                 ipr_tx_queue_empty(THE_UNIT);
 739         }
 740
 741         splx(s);
 742 }
 743
 744 /*---------------------------------------------------------------------------*
 745  *      this routine is called from L4 handler at connect time
 746  *---------------------------------------------------------------------------*/
 747 static void
 748 ipr_connect(int unit, void *cdp)
 749 {
 750         struct ipr_softc *sc = &ipr_softc[unit];
 751         int s;
 752
 753         sc->sc_cdp = (call_desc_t *)cdp;
 754
 755         s = SPLI4B();
 756
 757         NDBGL4(L4_DIALST, "ipr%d: setting dial state to ST_CONNECTED", unit);
 758
 759         sc->sc_if.if_flags |= IFF_RUNNING;
 760         sc->sc_state = ST_CONNECTED_W;
 761
 762         sc->sc_dialresp = DSTAT_NONE;
 763         sc->sc_lastdialresp = DSTAT_NONE;
 764
 765 #if I4BIPRACCT
 766         sc->sc_iinb = 0;
 767         sc->sc_ioutb = 0;
 768         sc->sc_inb = 0;
 769         sc->sc_outb = 0;
 770         sc->sc_linb = 0;
 771         sc->sc_loutb = 0;
 772         sc->sc_if.if_timer = I4BIPRACCTINTVL;
 773 #endif
 774
 775 #ifdef I4BIPRADJFRXP
 776         sc->sc_first_pkt = 1;
 777 #endif
 778
 779         /*
 780          * Sometimes ISDN B-channels are switched thru asymmetic. This
 781          * means that under such circumstances B-channel data (the first
 782          * three packets of a TCP connection in my case) may get lost,
 783          * causing a large delay until the connection is started.
 784          * When the sending of the very first packet of a TCP connection
 785          * is delayed for a to be empirically determined delay (close
 786          * to a second in my case) those packets go thru and the TCP
 787          * connection comes up "almost" immediately (-hm).
 788          */
 789
 790         if(sc->sc_cdp->isdntxdelay > 0)
 791         {
 792                 int delay;
 793
 794                 if (hz == 100) {
 795                         delay = sc->sc_cdp->isdntxdelay;        /* avoid any rounding */
 796                 } else {
 797                         delay = sc->sc_cdp->isdntxdelay*hz;
 798                         delay /= 100;
 799                 }
 800
 801                 START_TIMER(sc->sc_callout, (TIMEOUT_FUNC_T)i4bipr_connect_startio, (void *)sc,  delay);
 802         }
 803         else
 804         {
 805                 sc->sc_state = ST_CONNECTED_A;
 806                 ipr_tx_queue_empty(unit);
 807         }
 808
 809         splx(s);
 810
 811         /* we don't need any negotiation - pass event back right now */
 812         i4b_l4_negcomplete(sc->sc_cdp);
 813 }
 814
 815 /*---------------------------------------------------------------------------*
 816  *      this routine is called from L4 handler at disconnect time
 817  *---------------------------------------------------------------------------*/
 818 static void
 819 ipr_disconnect(int unit, void *cdp)
 820 {
 821         call_desc_t *cd = (call_desc_t *)cdp;
 822         struct ipr_softc *sc = &ipr_softc[unit];
 823
 824         /* new stuff to check that the active channel is being closed */
 825
 826         if (cd != sc->sc_cdp)
 827         {
 828                 NDBGL4(L4_IPRDBG, "ipr%d: channel %d not active",
 829                                 cd->driver_unit, cd->channelid);
 830                 return;
 831         }
 832
 833 #if I4BIPRACCT
 834         sc->sc_if.if_timer = 0;
 835 #endif
 836 #if IPR_LOG
 837         /* show next IPR_LOG packets again */
 838         sc->sc_log_first = IPR_LOG;
 839 #endif
 840
 841         i4b_l4_accounting(BDRV_IPR, cd->driver_unit, ACCT_FINAL,
 842                  sc->sc_ioutb, sc->sc_iinb, 0, 0, sc->sc_outb, sc->sc_inb);
 843
 844         sc->sc_cdp = (call_desc_t *)0;
 845
 846         NDBGL4(L4_DIALST, "setting dial state to ST_IDLE");
 847
 848         sc->sc_dialresp = DSTAT_NONE;
 849         sc->sc_lastdialresp = DSTAT_NONE;
 850
 851         sc->sc_if.if_flags &= ~IFF_RUNNING;
 852         sc->sc_state = ST_IDLE;
 853 }
 854
 855 /*---------------------------------------------------------------------------*
 856  *      this routine is used to give a feedback from userland daemon
 857  *      in case of dial problems
 858  *---------------------------------------------------------------------------*/
 859 static void
 860 ipr_dialresponse(int unit, int status, cause_t cause)
 861 {
 862         struct ipr_softc *sc = &ipr_softc[unit];
 863         sc->sc_dialresp = status;
 864
 865         NDBGL4(L4_IPRDBG, "ipr%d: last=%d, this=%d",
 866                 unit, sc->sc_lastdialresp, sc->sc_dialresp);
 867
 868         if(status != DSTAT_NONE)
 869         {
 870                 NDBGL4(L4_IPRDBG, "ipr%d: clearing queues", unit);
 871                 iprclearqueues(sc);
 872         }
 873 }
 874
 875 /*---------------------------------------------------------------------------*
 876  *      interface soft up/down
 877  *---------------------------------------------------------------------------*/
 878 static void
 879 ipr_updown(int unit, int updown)
 880 {
 881         struct ipr_softc *sc = &ipr_softc[unit];
 882         sc->sc_updown = updown;
 883 }
 884
 885 /*---------------------------------------------------------------------------*
 886  *      this routine is called from the HSCX interrupt handler
 887  *      when a new frame (mbuf) has been received and was put on
 888  *      the rx queue. It is assumed that this routines runs at
 889  *      pri level splimp() ! Keep it short !
 890  *---------------------------------------------------------------------------*/
 891 static void
 892 ipr_rx_data_rdy(int unit)
 893 {
 894         struct ipr_softc *sc = &ipr_softc[unit];
 895         struct mbuf *m;
 896 #ifdef IPR_VJ
 897 #ifdef IPR_VJ_USEBUFFER
 898         u_char *cp = sc->sc_cbuf;
 899 #endif
 900         int len, c;
 901 #endif
 902
 903         if((m = *isdn_linktab[unit]->rx_mbuf) == NULL)
 904                 return;
 905
 906         m->m_pkthdr.rcvif = &sc->sc_if;
 907
 908         m->m_pkthdr.len = m->m_len;
 909
 910         microtime(&sc->sc_if.if_lastchange);
 911
 912 #ifdef I4BIPRADJFRXP
 913
 914         /*
 915          * The very first packet after the B channel is switched thru
 916          * has very often several bytes of random data prepended. This
 917          * routine looks where the IP header starts and removes the
 918          * the bad data.
 919          */
 920
 921         if(sc->sc_first_pkt)
 922         {
 923                 unsigned char *mp = m->m_data;
 924                 int i;
 925
 926                 sc->sc_first_pkt = 0;
 927
 928                 for(i = 0; i < m->m_len; i++, mp++)
 929                 {
 930                         if( ((*mp & 0xf0) == 0x40) &&
 931                             ((*mp & 0x0f) >= 0x05) )
 932                         {
 933                                 m->m_data = mp;
 934                                 m->m_pkthdr.len -= i;
 935                                 break;
 936                         }
 937                 }
 938         }
 939 #endif
 940
 941         sc->sc_if.if_ipackets++;
 942         sc->sc_if.if_ibytes += m->m_pkthdr.len;
 943
 944 #ifdef  IPR_VJ
 945         if((c = (*(mtod(m, u_char *)) & 0xf0)) != (IPVERSION << 4))
 946         {
 947                 /* copy data to buffer */
 948
 949                 len = m->m_len;
 950
 951 #ifdef IPR_VJ_USEBUFFER
 952 /* XXX */       m_copydata(m, 0, len, cp);
 953 #endif
 954
 955                 if(c & 0x80)
 956                 {
 957                         c = TYPE_COMPRESSED_TCP;
 958                 }
 959                 else if(c == TYPE_UNCOMPRESSED_TCP)
 960                 {
 961 #ifdef IPR_VJ_USEBUFFER
 962                         *cp &= 0x4f;            /* XXX */
 963 #else
 964                         *(mtod(m, u_char *)) &= 0x4f;
 965 #endif
 966                 }
 967
 968                 /*
 969                  * We've got something that's not an IP packet.
 970                  * If compression is enabled, try to decompress it.
 971                  * Otherwise, if `auto-enable' compression is on and
 972                  * it's a reasonable packet, decompress it and then
 973                  * enable compression.  Otherwise, drop it.
 974                  */
 975                 if(sc->sc_if.if_flags & IPR_COMPRESS)
 976                 {
 977 #ifdef IPR_VJ_USEBUFFER
 978                         len = sl_uncompress_tcp(&cp,len,(u_int)c,&sc->sc_compr);
 979 #else
 980                         len = sl_uncompress_tcp((u_char **)&m->m_data, len,
 981                                         (u_int)c, &sc->sc_compr);
 982 #endif
 983
 984                         if(len <= 0)
 985                         {
 986 #ifdef DEBUG_IPR_VJ
 987                                 printf("i4b_ipr, ipr_rx_data_rdy: len <= 0 IPR_COMPRESS!\n");
 988 #endif
 989                                 goto error;
 990                         }
 991                 }
 992                 else if((sc->sc_if.if_flags & IPR_AUTOCOMP) &&
 993                         (c == TYPE_UNCOMPRESSED_TCP) && (len >= 40))
 994                 {
 995 #ifdef IPR_VJ_USEBUFFER
 996                         len = sl_uncompress_tcp(&cp,len,(u_int)c,&sc->sc_compr);
 997 #else
 998                         len = sl_uncompress_tcp((u_char **)&m->m_data, len,
 999                                         (u_int)c, &sc->sc_compr);
1000 #endif
1001
1002                         if(len <= 0)
1003                         {
1004 #ifdef DEBUG_IPR_VJ
1005                                 printf("i4b_ipr, ipr_rx_data_rdy: len <= 0 IPR_AUTOCOMP!\n");
1006 #endif
1007                                 goto error;
1008                         }
1009
1010                         sc->sc_if.if_flags |= IPR_COMPRESS;
1011                 }
1012                 else
1013                 {
1014 #ifdef DEBUG_IPR_VJ
1015                         printf("i4b_ipr, ipr_input: invalid ip packet!\n");
1016 #endif
1017
1018 error:
1019                         sc->sc_if.if_ierrors++;
1020                         sc->sc_if.if_collisions++;
1021                         m_freem(m);
1022                         return;
1023                 }
1024 #ifdef IPR_VJ_USEBUFFER
1025 /* XXX */       m_copyback(m, 0, len, cp);
1026 #else
1027                 m->m_len = m->m_pkthdr.len = len;
1028 #endif
1029         }
1030 #endif
1031
1032 #if I4BIPRACCT
1033         /* NB. do the accounting after decompression!           */
1034         sc->sc_inb += m->m_pkthdr.len;
1035 #endif
1036 #if IPR_LOG
1037         if(sc->sc_log_first > 0)
1038         {
1039                 --(sc->sc_log_first);
1040                 i4b_l4_packet_ind(BDRV_IPR, unit, 0, m );
1041         }
1042 #endif
1043
1044 #if NBPFILTER > 0 || NBPF > 0
1045         if(sc->sc_if.if_bpf)
1046         {
1047                 /* prepend the address family as a four byte field */
1048                 struct mbuf mm;
1049                 u_int af = AF_INET;
1050                 mm.m_next = m;
1051                 mm.m_len = 4;
1052                 mm.m_data = (char *)&af;
1053
1054 #ifdef __FreeBSD__
1055                 bpf_mtap(&sc->sc_if, &mm);
1056 #else
1057                 bpf_mtap(sc->sc_if.if_bpf, &mm);
1058 #endif
1059         }
1060 #endif /* NBPFILTER > 0  || NBPF > 0 */
1061
1062 #if defined (__FreeBSD__)
1063         if (netisr_queue(NETISR_IP, m)) {
1064                 NDBGL4(L4_IPRDBG, "ipr%d: ipintrq full!", unit);
1065                 sc->sc_if.if_ierrors++;
1066                 sc->sc_if.if_iqdrops++;
1067         }
1068 #endif
1069 }
1070
1071 /*---------------------------------------------------------------------------*
1072  *      this routine is called from the HSCX interrupt handler
1073  *      when the last frame has been sent out and there is no
1074  *      further frame (mbuf) in the tx queue.
1075  *---------------------------------------------------------------------------*/
1076 static void
1077 ipr_tx_queue_empty(int unit)
1078 {
1079         struct ipr_softc *sc = &ipr_softc[unit];
1080         struct mbuf *m;
1081 #ifdef  IPR_VJ
1082         struct ip *ip;
1083 #endif
1084         int x = 0;
1085
1086         if(sc->sc_state != ST_CONNECTED_A)
1087                 return;
1088
1089         for(;;)
1090         {
1091                 IF_DEQUEUE(&sc->sc_fastq, m);
1092                 if(m)
1093                 {
1094                         sc->sc_if.if_omcasts++;
1095                 }
1096                 else
1097                 {
1098                         IF_DEQUEUE(&sc->sc_if.if_snd, m);
1099                         if(m == NULL)
1100                                 break;
1101                 }
1102
1103                 microtime(&sc->sc_if.if_lastchange);
1104
1105 #if NBPFILTER > 0 || NBPF > 0
1106                 if(sc->sc_if.if_bpf)
1107                 {
1108                         /* prepend the address family as a four byte field */
1109
1110                         struct mbuf mm;
1111                         u_int af = AF_INET;
1112                         mm.m_next = m;
1113                         mm.m_len = 4;
1114                         mm.m_data = (char *)&af;
1115
1116 #ifdef __FreeBSD__
1117                         bpf_mtap(&sc->sc_if, &mm);
1118 #else
1119                         bpf_mtap(sc->sc_if.if_bpf, &mm);
1120 #endif
1121                 }
1122 #endif /* NBPFILTER */
1123
1124 #if I4BIPRACCT
1125                 sc->sc_outb += m->m_pkthdr.len; /* size before compression */
1126 #endif
1127
1128 #ifdef  IPR_VJ
1129                 if((ip = mtod(m, struct ip *))->ip_p == IPPROTO_TCP)
1130                 {
1131                         if(sc->sc_if.if_flags & IPR_COMPRESS)
1132                         {
1133                                 *mtod(m, u_char *) |= sl_compress_tcp(m, ip,
1134                                         &sc->sc_compr, 1);
1135                         }
1136                 }
1137 #endif
1138                 x = 1;
1139
1140                 IF_LOCK(isdn_linktab[unit]->tx_queue);
1141                 if(_IF_QFULL(isdn_linktab[unit]->tx_queue))
1142                 {
1143                         NDBGL4(L4_IPRDBG, "ipr%d: tx queue full!", unit);
1144                         m_freem(m);
1145                 }
1146                 else
1147                 {
1148                         sc->sc_if.if_obytes += m->m_pkthdr.len;
1149
1150                         sc->sc_if.if_opackets++;
1151
1152                         _IF_ENQUEUE(isdn_linktab[unit]->tx_queue, m);
1153
1154                 }
1155                 IF_UNLOCK(isdn_linktab[unit]->tx_queue);
1156         }
1157
1158         if(x)
1159                 (*isdn_linktab[unit]->bch_tx_start)(isdn_linktab[unit]->unit, isdn_linktab[unit]->channel);
1160 }
1161
1162 /*---------------------------------------------------------------------------*
1163  *      this routine is called from the HSCX interrupt handler
1164  *      each time a packet is received or transmitted. It should
1165  *      be used to implement an activity timeout mechanism.
1166  *---------------------------------------------------------------------------*/
1167 static void
1168 ipr_activity(int unit, int rxtx)
1169 {
1170         ipr_softc[unit].sc_cdp->last_active_time = SECOND;
1171 }
1172
1173 /*---------------------------------------------------------------------------*
1174  *      return this drivers linktab address
1175  *---------------------------------------------------------------------------*/
1176 drvr_link_t *
1177 ipr_ret_linktab(int unit)
1178 {
1179         return(&ipr_drvr_linktab[unit]);
1180 }
1181
1182 /*---------------------------------------------------------------------------*
1183  *      setup the isdn_linktab for this driver
1184  *---------------------------------------------------------------------------*/
1185 void
1186 ipr_set_linktab(int unit, isdn_link_t *ilt)
1187 {
1188         isdn_linktab[unit] = ilt;
1189 }
1190
1191 /*---------------------------------------------------------------------------*
1192  *      initialize this drivers linktab
1193  *---------------------------------------------------------------------------*/
1194 static void
1195 ipr_init_linktab(int unit)
1196 {
1197         ipr_drvr_linktab[unit].unit = unit;
1198         ipr_drvr_linktab[unit].bch_rx_data_ready = ipr_rx_data_rdy;
1199         ipr_drvr_linktab[unit].bch_tx_queue_empty = ipr_tx_queue_empty;
1200         ipr_drvr_linktab[unit].bch_activity = ipr_activity;
1201         ipr_drvr_linktab[unit].line_connected = ipr_connect;
1202         ipr_drvr_linktab[unit].line_disconnected = ipr_disconnect;
1203         ipr_drvr_linktab[unit].dial_response = ipr_dialresponse;
1204         ipr_drvr_linktab[unit].updown_ind = ipr_updown;
1205 }
1206
1207 /*===========================================================================*/
1208
1209 #endif /* NI4BIPR > 0 */