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 1.11 2004/04/01 07:27:17 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 #if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
 200         struct callout  sc_callout;
 201 #endif
 202 #if defined(__DragonFly__) || 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(__DragonFly__) || defined __FreeBSD__ || defined __NetBSD__
 236 #  define IOCTL_CMD_T u_long
 237 #else
 238 #  define IOCTL_CMD_T int
 239 #endif
 240
 241 #if defined(__DragonFly__) || defined(__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                        struct ucred *cr);
 246 #else
 247 PDEVSTATIC void i4biprattach (void);
 248 static int i4biprioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
 249 #endif
 250
 251 #ifdef __bsdi__
 252 static int iprwatchdog(int unit);
 253 #else
 254 static void iprwatchdog(struct ifnet *ifp);
 255 #endif
 256 static void ipr_init_linktab(int unit);
 257 static void ipr_tx_queue_empty(int unit);
 258 static int i4biproutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, struct rtentry *rtp);
 259 static void iprclearqueues(struct ipr_softc *sc);
 260
 261 /*===========================================================================*
 262  *                      DEVICE DRIVER ROUTINES
 263  *===========================================================================*/
 264
 265 /*---------------------------------------------------------------------------*
 266  *      interface attach routine at kernel boot time
 267  *---------------------------------------------------------------------------*/
 268 PDEVSTATIC void
 269 #if defined(__DragonFly__) || defined(__FreeBSD__)
 270 i4biprattach(void *dummy)
 271 #else
 272 i4biprattach()
 273 #endif
 274 {
 275         struct ipr_softc *sc = ipr_softc;
 276         int i;
 277
 278 #ifdef IPR_VJ
 279         printf("i4bipr: %d IP over raw HDLC ISDN device(s) attached (VJ header compression)\n", NI4BIPR);
 280 #else
 281         printf("i4bipr: %d IP over raw HDLC ISDN device(s) attached\n", NI4BIPR);
 282 #endif
 283
 284         for(i=0; i < NI4BIPR; sc++, i++)
 285         {
 286                 ipr_init_linktab(i);
 287
 288                 NDBGL4(L4_DIALST, "setting dial state to ST_IDLE");
 289
 290                 sc->sc_state = ST_IDLE;
 291
 292 #ifdef __DragonFly__
 293                 if_initname(&(sc->sc_if), "ipr", i);
 294 #elif defined(__FreeBSD__)
 295                 sc->sc_if.if_name = "ipr";
 296                 sc->sc_if.if_unit = i;
 297 #elif defined(__bsdi__)
 298                 sc->sc_if.if_name = "ipr";
 299                 sc->sc_if.if_unit = i;
 300 #else
 301                 sprintf(sc->sc_if.if_xname, "ipr%d", i);
 302                 sc->sc_if.if_softc = sc;
 303                 sc->sc_unit = i;
 304 #endif
 305
 306 #ifdef  IPR_VJ
 307                 sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_SIMPLEX | IPR_AUTOCOMP;
 308 #else
 309                 sc->sc_if.if_flags = IFF_POINTOPOINT | IFF_SIMPLEX;
 310 #endif
 311
 312 #if defined(__NetBSD__) && __NetBSD_Version__ >= 104230000
 313                 callout_init(&sc->sc_callout);
 314 #endif
 315
 316                 sc->sc_if.if_mtu = I4BIPRMTU;
 317                 sc->sc_if.if_type = IFT_ISDNBASIC;
 318                 sc->sc_if.if_ioctl = i4biprioctl;
 319                 sc->sc_if.if_output = i4biproutput;
 320
 321                 sc->sc_if.if_snd.ifq_maxlen = I4BIPRMAXQLEN;
 322                 sc->sc_fastq.ifq_maxlen = I4BIPRMAXQLEN;
 323
 324 #if defined (__FreeBSD__) && __FreeBSD__ > 4
 325                 mtx_init(&sc->sc_fastq.ifq_mtx, "i4b_ipr_fastq", MTX_DEF);
 326 #endif
 327                 sc->sc_if.if_ipackets = 0;
 328                 sc->sc_if.if_ierrors = 0;
 329                 sc->sc_if.if_opackets = 0;
 330                 sc->sc_if.if_oerrors = 0;
 331                 sc->sc_if.if_collisions = 0;
 332                 sc->sc_if.if_ibytes = 0;
 333                 sc->sc_if.if_obytes = 0;
 334                 sc->sc_if.if_imcasts = 0;
 335                 sc->sc_if.if_omcasts = 0;
 336                 sc->sc_if.if_iqdrops = 0;
 337                 sc->sc_if.if_noproto = 0;
 338
 339 #if I4BIPRACCT
 340                 sc->sc_if.if_timer = 0;
 341                 sc->sc_if.if_watchdog = iprwatchdog;
 342                 sc->sc_iinb = 0;
 343                 sc->sc_ioutb = 0;
 344                 sc->sc_inb = 0;
 345                 sc->sc_outb = 0;
 346                 sc->sc_linb = 0;
 347                 sc->sc_loutb = 0;
 348                 sc->sc_fn = 1;
 349 #endif
 350 #if IPR_LOG
 351                 sc->sc_log_first = IPR_LOG;
 352 #endif
 353
 354 #ifdef  IPR_VJ
 355 #if defined(__DragonFly__) || defined(__FreeBSD__)
 356                 sl_compress_init(&sc->sc_compr, -1);
 357 #else
 358                 sl_compress_init(&sc->sc_compr);
 359 #endif
 360
 361 #ifdef IPR_VJ_USEBUFFER
 362                 if(!((sc->sc_cbuf =
 363                    (u_char *)malloc(I4BIPRMAXMTU+128, M_DEVBUF, M_WAITOK))))
 364                 {
 365                         panic("if_ipr.c, ipr_attach: VJ malloc failed");
 366                 }
 367 #endif
 368 #endif
 369                 sc->sc_updown = SOFT_ENA;       /* soft enabled */
 370                 sc->sc_dialresp = DSTAT_NONE;   /* no response */
 371                 sc->sc_lastdialresp = DSTAT_NONE;
 372
 373                 if_attach(&sc->sc_if);
 374
 375 #if NBPFILTER > 0 || NBPF > 0
 376 #if defined(__DragonFly__) || defined(__FreeBSD__)
 377                 bpfattach(&sc->sc_if, DLT_NULL, sizeof(u_int));
 378 #else
 379                 bpfattach(&sc->sc_if.if_bpf, &sc->sc_if, DLT_NULL, sizeof(u_int));
 380 #endif
 381 #endif
 382         }
 383 }
 384
 385 /*---------------------------------------------------------------------------*
 386  *      output a packet to the ISDN B-channel
 387  *---------------------------------------------------------------------------*/
 388 static int
 389 i4biproutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
 390          struct rtentry *rtp)
 391 {
 392         struct ipr_softc *sc;
 393         int unit;
 394         int s;
 395         struct ifqueue *ifq;
 396         struct ip *ip;
 397
 398         s = SPLI4B();
 399
 400 #if (defined(__FreeBSD__) && !defined(__DragonFly__)) || (defined(__bsdi__))
 401         unit = ifp->if_unit;
 402         sc = &ipr_softc[unit];
 403 #else
 404         sc = ifp->if_softc;
 405         unit = sc->sc_unit;
 406 #endif
 407
 408         /* check for IP */
 409
 410         if(dst->sa_family != AF_INET)
 411         {
 412                 printf(IPR_FMT "af%d not supported\n", IPR_ARG(sc), dst->sa_family);
 413                 m_freem(m);
 414                 splx(s);
 415                 sc->sc_if.if_noproto++;
 416                 sc->sc_if.if_oerrors++;
 417                 return(EAFNOSUPPORT);
 418         }
 419
 420         /* check interface state = UP */
 421
 422         if(!(ifp->if_flags & IFF_UP))
 423         {
 424                 NDBGL4(L4_IPRDBG, "ipr%d: interface is DOWN!", unit);
 425                 m_freem(m);
 426                 splx(s);
 427                 sc->sc_if.if_oerrors++;
 428                 return(ENETDOWN);
 429         }
 430
 431         /* dial if necessary */
 432
 433         if(sc->sc_state == ST_IDLE || sc->sc_state == ST_DIALING)
 434         {
 435
 436 #ifdef NOTDEF
 437                 switch(sc->sc_dialresp)
 438                 {
 439                         case DSTAT_TFAIL:       /* transient failure */
 440                                 NDBGL4(L4_IPRDBG, "ipr%d: transient dial failure!", unit);
 441                                 m_freem(m);
 442                                 iprclearqueues(sc);
 443                                 sc->sc_dialresp = DSTAT_NONE;
 444                                 splx(s);
 445                                 sc->sc_if.if_oerrors++;
 446                                 return(ENETUNREACH);
 447                                 break;
 448
 449                         case DSTAT_PFAIL:       /* permanent failure */
 450                                 NDBGL4(L4_IPRDBG, "ipr%d: permanent dial failure!", unit);
 451                                 m_freem(m);
 452                                 iprclearqueues(sc);
 453                                 sc->sc_dialresp = DSTAT_NONE;
 454                                 splx(s);
 455                                 sc->sc_if.if_oerrors++;
 456                                 return(EHOSTUNREACH);
 457                                 break;
 458
 459                         case DSTAT_INONLY:      /* no dialout allowed*/
 460                                 NDBGL4(L4_IPRDBG, "ipr%d: dialout not allowed failure!", unit);
 461                                 m_freem(m);
 462                                 iprclearqueues(sc);
 463                                 sc->sc_dialresp = DSTAT_NONE;
 464                                 splx(s);
 465                                 sc->sc_if.if_oerrors++;
 466                                 return(EHOSTUNREACH);
 467                                 break;
 468                 }
 469 #endif
 470
 471                 NDBGL4(L4_IPRDBG, "ipr%d: send dial request message!", unit);
 472                 NDBGL4(L4_DIALST, "ipr%d: setting dial state to ST_DIALING", unit);
 473                 i4b_l4_dialout(BDRV_IPR, unit);
 474                 sc->sc_state = ST_DIALING;
 475         }
 476
 477 #if IPR_LOG
 478         if(sc->sc_log_first > 0)
 479         {
 480                 --(sc->sc_log_first);
 481                 i4b_l4_packet_ind(BDRV_IPR, unit, 1, m );
 482         }
 483 #endif
 484
 485         /* update access time */
 486
 487         microtime(&sc->sc_if.if_lastchange);
 488
 489         /*
 490          * check, if type of service indicates interactive, i.e. telnet,
 491          * traffic. in case it is interactive, put it into the fast queue,
 492          * else (i.e. ftp traffic) put it into the "normal" queue
 493          */
 494
 495         ip = mtod(m, struct ip *);              /* get ptr to ip header */
 496
 497         if(ip->ip_tos & IPTOS_LOWDELAY)
 498                 ifq = &sc->sc_fastq;
 499         else
 500                 ifq = &sc->sc_if.if_snd;
 501
 502         /* check for space in choosen send queue */
 503
 504 #if defined(__DragonFly__) || defined (__FreeBSD__)
 505         if (netisr_queue(NETISR_IP, m))
 506         {
 507                 NDBGL4(L4_IPRDBG, "ipr%d: send queue full!", unit);
 508                 splx(s);
 509                 sc->sc_if.if_oerrors++;
 510                 return(ENOBUFS);
 511         }
 512 #endif
 513
 514         NDBGL4(L4_IPRDBG, "ipr%d: add packet to send queue!", unit);
 515
 516         ipr_tx_queue_empty(unit);
 517
 518         splx(s);
 519
 520         return (0);
 521 }
 522
 523 /*---------------------------------------------------------------------------*
 524  *      process ioctl
 525  *---------------------------------------------------------------------------*/
 526 #if defined(__DragonFly__) || defined(__FreeBSD__)
 527 static int
 528 i4biprioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, caddr_t data, struct ucred *cr)
 529 #else
 530 static int
 531 i4biprioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
 532 #endif
 533 {
 534 #if (defined(__FreeBSD__) && !defined(__DragonFly__)) || (defined(__bsdi__))
 535         struct ipr_softc *sc = &ipr_softc[ifp->if_unit];
 536 #else
 537         struct ipr_softc *sc = ifp->if_softc;
 538 #endif
 539
 540         struct ifreq *ifr = (struct ifreq *)data;
 541         struct ifaddr *ifa = (struct ifaddr *)data;
 542         int s;
 543         int error = 0;
 544
 545         s = SPLI4B();
 546
 547         switch (cmd)
 548         {
 549                 case SIOCAIFADDR:       /* add interface address */
 550                 case SIOCSIFADDR:       /* set interface address */
 551                 case SIOCSIFDSTADDR:    /* set interface destination address */
 552                         if(ifa->ifa_addr->sa_family != AF_INET)
 553                                 error = EAFNOSUPPORT;
 554                         else
 555                                 sc->sc_if.if_flags |= IFF_UP;
 556                         microtime(&sc->sc_if.if_lastchange);
 557                         break;
 558
 559                 case SIOCSIFFLAGS:      /* set interface flags */
 560                         if(!(ifr->ifr_flags & IFF_UP))
 561                         {
 562                                 if(sc->sc_if.if_flags & IFF_RUNNING)
 563                                 {
 564                                         /* disconnect ISDN line */
 565 #if (defined(__FreeBSD__) && !defined(__DragonFly__)) || (defined(__bsdi__))
 566                                         i4b_l4_drvrdisc(BDRV_IPR, ifp->if_unit);
 567 #else
 568                                         i4b_l4_drvrdisc(BDRV_IPR, sc->sc_unit);
 569 #endif
 570                                         sc->sc_if.if_flags &= ~IFF_RUNNING;
 571                                 }
 572
 573                                 sc->sc_state = ST_IDLE;
 574
 575                                 /* empty queues */
 576
 577                                 iprclearqueues(sc);
 578                         }
 579
 580                         if(ifr->ifr_flags & IFF_DEBUG)
 581                         {
 582                                 /* enable debug messages */
 583                         }
 584
 585                         microtime(&sc->sc_if.if_lastchange);
 586                         break;
 587
 588 #if !defined(__OpenBSD__)
 589                 case SIOCSIFMTU:        /* set interface MTU */
 590                         if(ifr->ifr_mtu > I4BIPRMAXMTU)
 591                                 error = EINVAL;
 592                         else if(ifr->ifr_mtu < I4BIPRMINMTU)
 593                                 error = EINVAL;
 594                         else
 595                         {
 596                                 ifp->if_mtu = ifr->ifr_mtu;
 597                                 microtime(&sc->sc_if.if_lastchange);
 598                         }
 599                         break;
 600 #endif /* __OPENBSD__ */
 601
 602 #if 0
 603         /* not needed for FreeBSD, done in sl_compress_init() (-hm) */
 604
 605                         /* need to add an ioctl:        set VJ max slot ID
 606                          * #define IPRIOCSMAXCID        _IOW('I', XXX, int)
 607                          */
 608 #ifdef IPR_VJ
 609                 case IPRIOCSMAXCID:
 610                         {
 611                         struct thread *td = curthread;  /* XXX */
 612
 613                         if ((error = suser(td)) != 0)
 614                                 return (error);
 615                         sl_compress_setup(sc->sc_compr, *(int *)data);
 616                         }
 617                         break;
 618 #endif
 619 #endif
 620                 default:
 621                         error = EINVAL;
 622                         break;
 623         }
 624
 625         splx(s);
 626
 627         return(error);
 628 }
 629
 630 /*---------------------------------------------------------------------------*
 631  *      clear the interface's send queues
 632  *---------------------------------------------------------------------------*/
 633 static void
 634 iprclearqueues(struct ipr_softc *sc)
 635 {
 636         int x;
 637
 638 #if defined (__FreeBSD__) && __FreeBSD__ > 4
 639         x = splimp();
 640         IF_DRAIN(&sc->sc_fastq);
 641         IF_DRAIN(&sc->sc_if.if_snd);
 642         splx(x);
 643 #else
 644         struct mbuf *m;
 645
 646         for(;;)
 647         {
 648                 x = splimp();
 649                 IF_DEQUEUE(&sc->sc_fastq, m);
 650                 splx(x);
 651                 if(m)
 652                         m_freem(m);
 653                 else
 654                         break;
 655         }
 656
 657         for(;;)
 658         {
 659                 x = splimp();
 660                 IF_DEQUEUE(&sc->sc_if.if_snd, m);
 661                 splx(x);
 662                 if(m)
 663                         m_freem(m);
 664                 else
 665                         break;
 666         }
 667 #endif
 668 }
 669
 670 #if I4BIPRACCT
 671 /*---------------------------------------------------------------------------*
 672  *      watchdog routine
 673  *---------------------------------------------------------------------------*/
 674 #ifdef __bsdi__
 675 static int
 676 iprwatchdog(int unit)
 677 {
 678 #else
 679 static void
 680 iprwatchdog(struct ifnet *ifp)
 681 {
 682 #endif
 683 #if defined(__FreeBSD__) && !defined(__DragonFly__)
 684         int unit = ifp->if_unit;
 685         struct ipr_softc *sc = &ipr_softc[unit];
 686 #elif defined(__bsdi__)
 687         struct ipr_softc *sc = &ipr_softc[unit];
 688         struct ifnet *ifp = &ipr_softc[unit].sc_if;
 689 #else
 690         struct ipr_softc *sc = ifp->if_softc;
 691         int unit = sc->sc_unit;
 692 #endif
 693         bchan_statistics_t bs;
 694
 695         /* get # of bytes in and out from the HSCX driver */
 696
 697         (*isdn_linktab[unit]->bch_stat)
 698                 (isdn_linktab[unit]->unit, isdn_linktab[unit]->channel, &bs);
 699
 700         sc->sc_ioutb += bs.outbytes;
 701         sc->sc_iinb += bs.inbytes;
 702
 703         if((sc->sc_iinb != sc->sc_linb) || (sc->sc_ioutb != sc->sc_loutb) || sc->sc_fn)
 704         {
 705                 int ri = (sc->sc_iinb - sc->sc_linb)/I4BIPRACCTINTVL;
 706                 int ro = (sc->sc_ioutb - sc->sc_loutb)/I4BIPRACCTINTVL;
 707
 708                 if((sc->sc_iinb == sc->sc_linb) && (sc->sc_ioutb == sc->sc_loutb))
 709                         sc->sc_fn = 0;
 710                 else
 711                         sc->sc_fn = 1;
 712
 713                 sc->sc_linb = sc->sc_iinb;
 714                 sc->sc_loutb = sc->sc_ioutb;
 715
 716                 i4b_l4_accounting(BDRV_IPR, unit, ACCT_DURING,
 717                          sc->sc_ioutb, sc->sc_iinb, ro, ri, sc->sc_outb, sc->sc_inb);
 718         }
 719         sc->sc_if.if_timer = I4BIPRACCTINTVL;
 720 #ifdef __bsdi__
 721         return 0;
 722 #endif
 723 }
 724 #endif /* I4BIPRACCT */
 725
 726 /*===========================================================================*
 727  *                      ISDN INTERFACE ROUTINES
 728  *===========================================================================*/
 729
 730 /*---------------------------------------------------------------------------*
 731  *      start transmitting after connect
 732  *---------------------------------------------------------------------------*/
 733 static void
 734 i4bipr_connect_startio(struct ipr_softc *sc)
 735 {
 736         int s = SPLI4B();
 737
 738         if(sc->sc_state == ST_CONNECTED_W)
 739         {
 740                 sc->sc_state = ST_CONNECTED_A;
 741                 ipr_tx_queue_empty(THE_UNIT);
 742         }
 743
 744         splx(s);
 745 }
 746
 747 /*---------------------------------------------------------------------------*
 748  *      this routine is called from L4 handler at connect time
 749  *---------------------------------------------------------------------------*/
 750 static void
 751 ipr_connect(int unit, void *cdp)
 752 {
 753         struct ipr_softc *sc = &ipr_softc[unit];
 754         int s;
 755
 756         sc->sc_cdp = (call_desc_t *)cdp;
 757
 758         s = SPLI4B();
 759
 760         NDBGL4(L4_DIALST, "ipr%d: setting dial state to ST_CONNECTED", unit);
 761
 762         sc->sc_if.if_flags |= IFF_RUNNING;
 763         sc->sc_state = ST_CONNECTED_W;
 764
 765         sc->sc_dialresp = DSTAT_NONE;
 766         sc->sc_lastdialresp = DSTAT_NONE;
 767
 768 #if I4BIPRACCT
 769         sc->sc_iinb = 0;
 770         sc->sc_ioutb = 0;
 771         sc->sc_inb = 0;
 772         sc->sc_outb = 0;
 773         sc->sc_linb = 0;
 774         sc->sc_loutb = 0;
 775         sc->sc_if.if_timer = I4BIPRACCTINTVL;
 776 #endif
 777
 778 #ifdef I4BIPRADJFRXP
 779         sc->sc_first_pkt = 1;
 780 #endif
 781
 782         /*
 783          * Sometimes ISDN B-channels are switched thru asymmetic. This
 784          * means that under such circumstances B-channel data (the first
 785          * three packets of a TCP connection in my case) may get lost,
 786          * causing a large delay until the connection is started.
 787          * When the sending of the very first packet of a TCP connection
 788          * is delayed for a to be empirically determined delay (close
 789          * to a second in my case) those packets go thru and the TCP
 790          * connection comes up "almost" immediately (-hm).
 791          */
 792
 793         if(sc->sc_cdp->isdntxdelay > 0)
 794         {
 795                 int delay;
 796
 797                 if (hz == 100) {
 798                         delay = sc->sc_cdp->isdntxdelay;        /* avoid any rounding */
 799                 } else {
 800                         delay = sc->sc_cdp->isdntxdelay*hz;
 801                         delay /= 100;
 802                 }
 803
 804                 START_TIMER(sc->sc_callout, (TIMEOUT_FUNC_T)i4bipr_connect_startio, (void *)sc,  delay);
 805         }
 806         else
 807         {
 808                 sc->sc_state = ST_CONNECTED_A;
 809                 ipr_tx_queue_empty(unit);
 810         }
 811
 812         splx(s);
 813
 814         /* we don't need any negotiation - pass event back right now */
 815         i4b_l4_negcomplete(sc->sc_cdp);
 816 }
 817
 818 /*---------------------------------------------------------------------------*
 819  *      this routine is called from L4 handler at disconnect time
 820  *---------------------------------------------------------------------------*/
 821 static void
 822 ipr_disconnect(int unit, void *cdp)
 823 {
 824         call_desc_t *cd = (call_desc_t *)cdp;
 825         struct ipr_softc *sc = &ipr_softc[unit];
 826
 827         /* new stuff to check that the active channel is being closed */
 828
 829         if (cd != sc->sc_cdp)
 830         {
 831                 NDBGL4(L4_IPRDBG, "ipr%d: channel %d not active",
 832                                 cd->driver_unit, cd->channelid);
 833                 return;
 834         }
 835
 836 #if I4BIPRACCT
 837         sc->sc_if.if_timer = 0;
 838 #endif
 839 #if IPR_LOG
 840         /* show next IPR_LOG packets again */
 841         sc->sc_log_first = IPR_LOG;
 842 #endif
 843
 844         i4b_l4_accounting(BDRV_IPR, cd->driver_unit, ACCT_FINAL,
 845                  sc->sc_ioutb, sc->sc_iinb, 0, 0, sc->sc_outb, sc->sc_inb);
 846
 847         sc->sc_cdp = (call_desc_t *)0;
 848
 849         NDBGL4(L4_DIALST, "setting dial state to ST_IDLE");
 850
 851         sc->sc_dialresp = DSTAT_NONE;
 852         sc->sc_lastdialresp = DSTAT_NONE;
 853
 854         sc->sc_if.if_flags &= ~IFF_RUNNING;
 855         sc->sc_state = ST_IDLE;
 856 }
 857
 858 /*---------------------------------------------------------------------------*
 859  *      this routine is used to give a feedback from userland daemon
 860  *      in case of dial problems
 861  *---------------------------------------------------------------------------*/
 862 static void
 863 ipr_dialresponse(int unit, int status, cause_t cause)
 864 {
 865         struct ipr_softc *sc = &ipr_softc[unit];
 866         sc->sc_dialresp = status;
 867
 868         NDBGL4(L4_IPRDBG, "ipr%d: last=%d, this=%d",
 869                 unit, sc->sc_lastdialresp, sc->sc_dialresp);
 870
 871         if(status != DSTAT_NONE)
 872         {
 873                 NDBGL4(L4_IPRDBG, "ipr%d: clearing queues", unit);
 874                 iprclearqueues(sc);
 875         }
 876 }
 877
 878 /*---------------------------------------------------------------------------*
 879  *      interface soft up/down
 880  *---------------------------------------------------------------------------*/
 881 static void
 882 ipr_updown(int unit, int updown)
 883 {
 884         struct ipr_softc *sc = &ipr_softc[unit];
 885         sc->sc_updown = updown;
 886 }
 887
 888 /*---------------------------------------------------------------------------*
 889  *      this routine is called from the HSCX interrupt handler
 890  *      when a new frame (mbuf) has been received and was put on
 891  *      the rx queue. It is assumed that this routines runs at
 892  *      pri level splimp() ! Keep it short !
 893  *---------------------------------------------------------------------------*/
 894 static void
 895 ipr_rx_data_rdy(int unit)
 896 {
 897         struct ipr_softc *sc = &ipr_softc[unit];
 898         struct mbuf *m;
 899 #ifdef IPR_VJ
 900 #ifdef IPR_VJ_USEBUFFER
 901         u_char *cp = sc->sc_cbuf;
 902 #endif
 903         int len, c;
 904 #endif
 905
 906         if((m = *isdn_linktab[unit]->rx_mbuf) == NULL)
 907                 return;
 908
 909         m->m_pkthdr.rcvif = &sc->sc_if;
 910
 911         m->m_pkthdr.len = m->m_len;
 912
 913         microtime(&sc->sc_if.if_lastchange);
 914
 915 #ifdef I4BIPRADJFRXP
 916
 917         /*
 918          * The very first packet after the B channel is switched thru
 919          * has very often several bytes of random data prepended. This
 920          * routine looks where the IP header starts and removes the
 921          * the bad data.
 922          */
 923
 924         if(sc->sc_first_pkt)
 925         {
 926                 unsigned char *mp = m->m_data;
 927                 int i;
 928
 929                 sc->sc_first_pkt = 0;
 930
 931                 for(i = 0; i < m->m_len; i++, mp++)
 932                 {
 933                         if( ((*mp & 0xf0) == 0x40) &&
 934                             ((*mp & 0x0f) >= 0x05) )
 935                         {
 936                                 m->m_data = mp;
 937                                 m->m_pkthdr.len -= i;
 938                                 break;
 939                         }
 940                 }
 941         }
 942 #endif
 943
 944         sc->sc_if.if_ipackets++;
 945         sc->sc_if.if_ibytes += m->m_pkthdr.len;
 946
 947 #ifdef  IPR_VJ
 948         if((c = (*(mtod(m, u_char *)) & 0xf0)) != (IPVERSION << 4))
 949         {
 950                 /* copy data to buffer */
 951
 952                 len = m->m_len;
 953
 954 #ifdef IPR_VJ_USEBUFFER
 955 /* XXX */       m_copydata(m, 0, len, cp);
 956 #endif
 957
 958                 if(c & 0x80)
 959                 {
 960                         c = TYPE_COMPRESSED_TCP;
 961                 }
 962                 else if(c == TYPE_UNCOMPRESSED_TCP)
 963                 {
 964 #ifdef IPR_VJ_USEBUFFER
 965                         *cp &= 0x4f;            /* XXX */
 966 #else
 967                         *(mtod(m, u_char *)) &= 0x4f;
 968 #endif
 969                 }
 970
 971                 /*
 972                  * We've got something that's not an IP packet.
 973                  * If compression is enabled, try to decompress it.
 974                  * Otherwise, if `auto-enable' compression is on and
 975                  * it's a reasonable packet, decompress it and then
 976                  * enable compression.  Otherwise, drop it.
 977                  */
 978                 if(sc->sc_if.if_flags & IPR_COMPRESS)
 979                 {
 980 #ifdef IPR_VJ_USEBUFFER
 981                         len = sl_uncompress_tcp(&cp,len,(u_int)c,&sc->sc_compr);
 982 #else
 983                         len = sl_uncompress_tcp((u_char **)&m->m_data, len,
 984                                         (u_int)c, &sc->sc_compr);
 985 #endif
 986
 987                         if(len <= 0)
 988                         {
 989 #ifdef DEBUG_IPR_VJ
 990                                 printf("i4b_ipr, ipr_rx_data_rdy: len <= 0 IPR_COMPRESS!\n");
 991 #endif
 992                                 goto error;
 993                         }
 994                 }
 995                 else if((sc->sc_if.if_flags & IPR_AUTOCOMP) &&
 996                         (c == TYPE_UNCOMPRESSED_TCP) && (len >= 40))
 997                 {
 998 #ifdef IPR_VJ_USEBUFFER
 999                         len = sl_uncompress_tcp(&cp,len,(u_int)c,&sc->sc_compr);
1000 #else
1001                         len = sl_uncompress_tcp((u_char **)&m->m_data, len,
1002                                         (u_int)c, &sc->sc_compr);
1003 #endif
1004
1005                         if(len <= 0)
1006                         {
1007 #ifdef DEBUG_IPR_VJ
1008                                 printf("i4b_ipr, ipr_rx_data_rdy: len <= 0 IPR_AUTOCOMP!\n");
1009 #endif
1010                                 goto error;
1011                         }
1012
1013                         sc->sc_if.if_flags |= IPR_COMPRESS;
1014                 }
1015                 else
1016                 {
1017 #ifdef DEBUG_IPR_VJ
1018                         printf("i4b_ipr, ipr_input: invalid ip packet!\n");
1019 #endif
1020
1021 error:
1022                         sc->sc_if.if_ierrors++;
1023                         sc->sc_if.if_collisions++;
1024                         m_freem(m);
1025                         return;
1026                 }
1027 #ifdef IPR_VJ_USEBUFFER
1028 /* XXX */       m_copyback(m, 0, len, cp);
1029 #else
1030                 m->m_len = m->m_pkthdr.len = len;
1031 #endif
1032         }
1033 #endif
1034
1035 #if I4BIPRACCT
1036         /* NB. do the accounting after decompression!           */
1037         sc->sc_inb += m->m_pkthdr.len;
1038 #endif
1039 #if IPR_LOG
1040         if(sc->sc_log_first > 0)
1041         {
1042                 --(sc->sc_log_first);
1043                 i4b_l4_packet_ind(BDRV_IPR, unit, 0, m );
1044         }
1045 #endif
1046
1047 #if NBPFILTER > 0 || NBPF > 0
1048         if(sc->sc_if.if_bpf)
1049         {
1050                 /* prepend the address family as a four byte field */
1051                 struct mbuf mm;
1052                 u_int af = AF_INET;
1053                 mm.m_next = m;
1054                 mm.m_len = 4;
1055                 mm.m_data = (char *)&af;
1056
1057 #if defined(__DragonFly__) || defined(__FreeBSD__)
1058                 bpf_mtap(&sc->sc_if, &mm);
1059 #else
1060                 bpf_mtap(sc->sc_if.if_bpf, &mm);
1061 #endif
1062         }
1063 #endif /* NBPFILTER > 0  || NBPF > 0 */
1064
1065 #if defined(__DragonFly__) || defined (__FreeBSD__)
1066         if (netisr_queue(NETISR_IP, m)) {
1067                 NDBGL4(L4_IPRDBG, "ipr%d: ipintrq full!", unit);
1068                 sc->sc_if.if_ierrors++;
1069                 sc->sc_if.if_iqdrops++;
1070         }
1071 #endif
1072 }
1073
1074 /*---------------------------------------------------------------------------*
1075  *      this routine is called from the HSCX interrupt handler
1076  *      when the last frame has been sent out and there is no
1077  *      further frame (mbuf) in the tx queue.
1078  *---------------------------------------------------------------------------*/
1079 static void
1080 ipr_tx_queue_empty(int unit)
1081 {
1082         struct ipr_softc *sc = &ipr_softc[unit];
1083         struct mbuf *m;
1084 #ifdef  IPR_VJ
1085         struct ip *ip;
1086 #endif
1087         int x = 0;
1088
1089         if(sc->sc_state != ST_CONNECTED_A)
1090                 return;
1091
1092         for(;;)
1093         {
1094                 IF_DEQUEUE(&sc->sc_fastq, m);
1095                 if(m)
1096                 {
1097                         sc->sc_if.if_omcasts++;
1098                 }
1099                 else
1100                 {
1101                         IF_DEQUEUE(&sc->sc_if.if_snd, m);
1102                         if(m == NULL)
1103                                 break;
1104                 }
1105
1106                 microtime(&sc->sc_if.if_lastchange);
1107
1108 #if NBPFILTER > 0 || NBPF > 0
1109                 if(sc->sc_if.if_bpf)
1110                 {
1111                         /* prepend the address family as a four byte field */
1112
1113                         struct mbuf mm;
1114                         u_int af = AF_INET;
1115                         mm.m_next = m;
1116                         mm.m_len = 4;
1117                         mm.m_data = (char *)&af;
1118
1119 #if defined(__DragonFly__) || defined(__FreeBSD__)
1120                         bpf_mtap(&sc->sc_if, &mm);
1121 #else
1122                         bpf_mtap(sc->sc_if.if_bpf, &mm);
1123 #endif
1124                 }
1125 #endif /* NBPFILTER */
1126
1127 #if I4BIPRACCT
1128                 sc->sc_outb += m->m_pkthdr.len; /* size before compression */
1129 #endif
1130
1131 #ifdef  IPR_VJ
1132                 if((ip = mtod(m, struct ip *))->ip_p == IPPROTO_TCP)
1133                 {
1134                         if(sc->sc_if.if_flags & IPR_COMPRESS)
1135                         {
1136                                 *mtod(m, u_char *) |= sl_compress_tcp(m, ip,
1137                                         &sc->sc_compr, 1);
1138                         }
1139                 }
1140 #endif
1141                 x = 1;
1142
1143                 IF_LOCK(isdn_linktab[unit]->tx_queue);
1144                 if(_IF_QFULL(isdn_linktab[unit]->tx_queue))
1145                 {
1146                         NDBGL4(L4_IPRDBG, "ipr%d: tx queue full!", unit);
1147                         m_freem(m);
1148                 }
1149                 else
1150                 {
1151                         sc->sc_if.if_obytes += m->m_pkthdr.len;
1152
1153                         sc->sc_if.if_opackets++;
1154
1155                         _IF_ENQUEUE(isdn_linktab[unit]->tx_queue, m);
1156
1157                 }
1158                 IF_UNLOCK(isdn_linktab[unit]->tx_queue);
1159         }
1160
1161         if(x)
1162                 (*isdn_linktab[unit]->bch_tx_start)(isdn_linktab[unit]->unit, isdn_linktab[unit]->channel);
1163 }
1164
1165 /*---------------------------------------------------------------------------*
1166  *      this routine is called from the HSCX interrupt handler
1167  *      each time a packet is received or transmitted. It should
1168  *      be used to implement an activity timeout mechanism.
1169  *---------------------------------------------------------------------------*/
1170 static void
1171 ipr_activity(int unit, int rxtx)
1172 {
1173         ipr_softc[unit].sc_cdp->last_active_time = SECOND;
1174 }
1175
1176 /*---------------------------------------------------------------------------*
1177  *      return this drivers linktab address
1178  *---------------------------------------------------------------------------*/
1179 drvr_link_t *
1180 ipr_ret_linktab(int unit)
1181 {
1182         return(&ipr_drvr_linktab[unit]);
1183 }
1184
1185 /*---------------------------------------------------------------------------*
1186  *      setup the isdn_linktab for this driver
1187  *---------------------------------------------------------------------------*/
1188 void
1189 ipr_set_linktab(int unit, isdn_link_t *ilt)
1190 {
1191         isdn_linktab[unit] = ilt;
1192 }
1193
1194 /*---------------------------------------------------------------------------*
1195  *      initialize this drivers linktab
1196  *---------------------------------------------------------------------------*/
1197 static void
1198 ipr_init_linktab(int unit)
1199 {
1200         ipr_drvr_linktab[unit].unit = unit;
1201         ipr_drvr_linktab[unit].bch_rx_data_ready = ipr_rx_data_rdy;
1202         ipr_drvr_linktab[unit].bch_tx_queue_empty = ipr_tx_queue_empty;
1203         ipr_drvr_linktab[unit].bch_activity = ipr_activity;
1204         ipr_drvr_linktab[unit].line_connected = ipr_connect;
1205         ipr_drvr_linktab[unit].line_disconnected = ipr_disconnect;
1206         ipr_drvr_linktab[unit].dial_response = ipr_dialresponse;
1207         ipr_drvr_linktab[unit].updown_ind = ipr_updown;
1208 }
1209
1210 /*===========================================================================*/
1211
1212 #endif /* NI4BIPR > 0 */