sys/net/i4b/driver/i4b_ing.c

   1 /*
   2  * Copyright (c) 1999, 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_ing.c - isdn4bsd B-channel to netgraph driver
  28  *      -------------------------------------------------
  29  *
  30  * $FreeBSD: src/sys/i4b/driver/i4b_ing.c,v 1.10.2.4 2002/07/02 23:44:02 archie Exp $
  31  * $DragonFly: src/sys/net/i4b/driver/i4b_ing.c,v 1.11 2007/06/04 00:40:31 swildner Exp $
  32  *
  33  *      last edit-date: [Tue Jan  1 10:43:58 2002]
  34  *
  35  *---------------------------------------------------------------------------*/
  36
  37 #include "use_i4bing.h"
  38
  39 #if NI4BING > 0
  40
  41 #include "opt_i4b.h"
  42
  43 #include <sys/param.h>
  44 #include <sys/systm.h>
  45 #include <sys/kernel.h>
  46 #include <sys/mbuf.h>
  47 #include <sys/socket.h>
  48 #include <sys/errno.h>
  49 #include <sys/ctype.h>
  50 #include <sys/syslog.h>
  51 #include <sys/malloc.h>
  52 #include <sys/thread2.h>
  53
  54 #include <net/if.h>
  55
  56 #include <netgraph/ng_message.h>
  57 #include <netgraph/ng_parse.h>
  58 #include <netgraph/netgraph.h>
  59
  60 #include <net/i4b/include/machine/i4b_debug.h>
  61 #include <net/i4b/include/machine/i4b_ioctl.h>
  62
  63 #include "../include/i4b_global.h"
  64 #include "../include/i4b_mbuf.h"
  65 #include "../include/i4b_l3l4.h"
  66 #include "../layer4/i4b_l4.h"
  67
  68 #define I4BINGACCT      1               /* enable accounting messages */
  69 #define I4BINGACCTINTVL 2               /* accounting msg interval in secs */
  70
  71 #define I4BINGMAXQLEN   50              /* max queue length */
  72
  73 /* initialized by L4 */
  74
  75 static drvr_link_t ing_drvr_linktab[NI4BING];
  76 static isdn_link_t *isdn_linktab[NI4BING];
  77
  78 struct ing_softc {
  79         int             sc_unit;        /* unit number                  */
  80         int             sc_state;       /* state of the interface       */
  81         call_desc_t     *sc_cdp;        /* ptr to call descriptor       */
  82         int             sc_updown;      /* soft state of interface      */
  83         struct ifqueue  sc_fastq;       /* interactive traffic          */
  84         int             sc_dialresp;    /* dialresponse                 */
  85         int             sc_lastdialresp;/* last dialresponse            */
  86
  87 #if I4BINGACCT
  88         struct callout  sc_timeout;
  89         int             sc_iinb;        /* isdn driver # of inbytes     */
  90         int             sc_ioutb;       /* isdn driver # of outbytes    */
  91         int             sc_inb;         /* # of bytes rx'd              */
  92         int             sc_outb;        /* # of bytes tx'd              */
  93         int             sc_linb;        /* last # of bytes rx'd         */
  94         int             sc_loutb;       /* last # of bytes tx'd         */
  95         int             sc_fn;          /* flag, first null acct        */
  96 #endif
  97
  98         int             sc_inpkt;       /* incoming packets             */
  99         int             sc_outpkt;      /* outgoing packets             */
 100
 101         struct ifqueue  xmitq_hipri;    /* hi-priority transmit queue */
 102         struct ifqueue  xmitq;    /* transmit queue */
 103
 104         node_p          node;           /* back pointer to node */
 105         char            nodename[NG_NODESIZ]; /* store our node name */
 106         hook_p          debughook;
 107         hook_p          hook;
 108
 109         u_int           packets_in;     /* packets in from downstream */
 110         u_int           packets_out;    /* packets out towards downstream */
 111         u_int32_t       flags;
 112
 113 } ing_softc[NI4BING];
 114
 115 enum ing_states {
 116         ST_IDLE,                        /* initialized, ready, idle     */
 117         ST_DIALING,                     /* dialling out to remote       */
 118         ST_CONNECTED                    /* connected to remote          */
 119 };
 120
 121 static void i4bingattach(void *);
 122
 123 PSEUDO_SET(i4bingattach, i4b_ing);
 124
 125 static void ing_init_linktab(int unit);
 126 static void ing_tx_queue_empty(int unit);
 127
 128 /* ========= NETGRAPH ============= */
 129
 130 #define NG_ING_NODE_TYPE        "i4bing"        /* node type name */
 131 #define NGM_ING_COOKIE          947513046       /* node type cookie */
 132
 133 /* Hook names */
 134 #define NG_ING_HOOK_DEBUG       "debug"
 135 #define NG_ING_HOOK_RAW         "rawdata"
 136
 137 /* Netgraph commands understood by this node type */
 138 enum {
 139         NGM_ING_SET_FLAG = 1,
 140         NGM_ING_GET_STATUS,
 141 };
 142
 143 /* This structure is returned by the NGM_ING_GET_STATUS command */
 144 struct ngingstat {
 145         u_int   packets_in;     /* packets in from downstream */
 146         u_int   packets_out;    /* packets out towards downstream */
 147 };
 148
 149 /*
 150  * This is used to define the 'parse type' for a struct ngingstat, which
 151  * is bascially a description of how to convert a binary struct ngingstat
 152  * to an ASCII string and back.  See ng_parse.h for more info.
 153  *
 154  * This needs to be kept in sync with the above structure definition
 155  */
 156 #define NG_ING_STATS_TYPE_INFO  {                               \
 157           { "packets_in",       &ng_parse_int32_type    },      \
 158           { "packets_out",      &ng_parse_int32_type    },      \
 159           { NULL },                                             \
 160 }
 161
 162 /*
 163  * This section contains the netgraph method declarations for the
 164  * sample node. These methods define the netgraph 'type'.
 165  */
 166
 167 static ng_constructor_t ng_ing_constructor;
 168 static ng_rcvmsg_t      ng_ing_rcvmsg;
 169 static ng_shutdown_t    ng_ing_rmnode;
 170 static ng_newhook_t     ng_ing_newhook;
 171 static ng_connect_t     ng_ing_connect;
 172 static ng_rcvdata_t     ng_ing_rcvdata;
 173 static ng_disconnect_t  ng_ing_disconnect;
 174
 175 /* Parse type for struct ngingstat */
 176 static const struct
 177         ng_parse_struct_field ng_ing_stat_type_fields[] =
 178         NG_ING_STATS_TYPE_INFO;
 179
 180 static const struct ng_parse_type ng_ing_stat_type = {
 181         &ng_parse_struct_type,
 182         &ng_ing_stat_type_fields
 183 };
 184
 185 /* List of commands and how to convert arguments to/from ASCII */
 186
 187 static const struct ng_cmdlist ng_ing_cmdlist[] = {
 188         {
 189                 NGM_ING_COOKIE,
 190                 NGM_ING_GET_STATUS,
 191                 "getstatus",
 192                 NULL,
 193                 &ng_ing_stat_type,
 194         },
 195         {
 196                 NGM_ING_COOKIE,
 197                 NGM_ING_SET_FLAG,
 198                 "setflag",
 199                 &ng_parse_int32_type,
 200                 NULL
 201         },
 202         { 0 }
 203 };
 204
 205 /* Netgraph node type descriptor */
 206 static struct ng_type typestruct = {
 207         NG_VERSION,
 208         NG_ING_NODE_TYPE,
 209         NULL,
 210         ng_ing_constructor,
 211         ng_ing_rcvmsg,
 212         ng_ing_rmnode,
 213         ng_ing_newhook,
 214         NULL,
 215         ng_ing_connect,
 216         ng_ing_rcvdata,
 217         ng_ing_rcvdata,
 218         ng_ing_disconnect,
 219         ng_ing_cmdlist
 220 };
 221
 222 NETGRAPH_INIT_ORDERED(ing, &typestruct, SI_SUB_DRIVERS, SI_ORDER_ANY);
 223
 224 /*===========================================================================*
 225  *                      DEVICE DRIVER ROUTINES
 226  *===========================================================================*/
 227
 228 /*---------------------------------------------------------------------------*
 229  *      interface attach routine at kernel boot time
 230  *---------------------------------------------------------------------------*/
 231 static void
 232 i4bingattach(void *dummy)
 233 {
 234         struct ing_softc *sc = ing_softc;
 235         int i;
 236         int ret;
 237
 238         kprintf("i4bing: %d i4b NetGraph ISDN B-channel device(s) attached\n", NI4BING);
 239
 240         for(i=0; i < NI4BING; sc++, i++)
 241         {
 242                 sc->sc_unit = i;
 243
 244                 ing_init_linktab(i);
 245
 246                 NDBGL4(L4_DIALST, "setting dial state to ST_IDLE");
 247
 248                 sc->sc_state = ST_IDLE;
 249
 250                 sc->sc_fastq.ifq_maxlen = I4BINGMAXQLEN;
 251
 252 #if I4BINGACCT
 253                 callout_init(&sc->sc_timeout);
 254                 sc->sc_iinb = 0;
 255                 sc->sc_ioutb = 0;
 256                 sc->sc_inb = 0;
 257                 sc->sc_outb = 0;
 258                 sc->sc_linb = 0;
 259                 sc->sc_loutb = 0;
 260                 sc->sc_fn = 1;
 261 #endif
 262
 263                 sc->sc_inpkt = 0;
 264                 sc->sc_outpkt = 0;
 265
 266                 sc->sc_updown = SOFT_ENA;       /* soft enabled */
 267
 268                 sc->sc_dialresp = DSTAT_NONE;   /* no response */
 269                 sc->sc_lastdialresp = DSTAT_NONE;
 270
 271                 /* setup a netgraph node */
 272
 273                 if ((ret = ng_make_node_common(&typestruct, &sc->node)))
 274                 {
 275                         kprintf("ing: ng_make_node_common, ret = %d\n!", ret);
 276                 }
 277
 278                 sc->node->private = sc;
 279
 280                 sc->xmitq.ifq_maxlen = IFQ_MAXLEN;
 281                 sc->xmitq_hipri.ifq_maxlen = IFQ_MAXLEN;
 282
 283                 /* name the netgraph node */
 284
 285                 ksprintf(sc->nodename, "%s%d", NG_ING_NODE_TYPE, sc->sc_unit);
 286
 287                 if(ng_name_node(sc->node, sc->nodename))
 288                 {
 289                         ng_rmnode(sc->node);
 290                         ng_unref(sc->node);
 291                 }
 292         }
 293 }
 294
 295 #ifdef I4BINGACCT
 296 /*---------------------------------------------------------------------------*
 297  *      accounting timeout routine
 298  *---------------------------------------------------------------------------*/
 299 static void
 300 ing_timeout(struct ing_softc *sc)
 301 {
 302         bchan_statistics_t bs;
 303         int unit = sc->sc_unit;
 304
 305         /* get # of bytes in and out from the HSCX driver */
 306
 307         (*isdn_linktab[unit]->bch_stat)
 308                 (isdn_linktab[unit]->unit, isdn_linktab[unit]->channel, &bs);
 309
 310         sc->sc_ioutb += bs.outbytes;
 311         sc->sc_iinb += bs.inbytes;
 312
 313         if((sc->sc_iinb != sc->sc_linb) || (sc->sc_ioutb != sc->sc_loutb) || sc->sc_fn)
 314         {
 315                 int ri = (sc->sc_iinb - sc->sc_linb)/I4BINGACCTINTVL;
 316                 int ro = (sc->sc_ioutb - sc->sc_loutb)/I4BINGACCTINTVL;
 317
 318                 if((sc->sc_iinb == sc->sc_linb) && (sc->sc_ioutb == sc->sc_loutb))
 319                         sc->sc_fn = 0;
 320                 else
 321                         sc->sc_fn = 1;
 322
 323                 sc->sc_linb = sc->sc_iinb;
 324                 sc->sc_loutb = sc->sc_ioutb;
 325
 326                 i4b_l4_accounting(BDRV_ING, unit, ACCT_DURING,
 327                          sc->sc_ioutb, sc->sc_iinb, ro, ri, sc->sc_ioutb, sc->sc_iinb);
 328         }
 329
 330         callout_reset(&sc->sc_timeout, I4BINGACCTINTVL * hz,
 331                         (TIMEOUT_FUNC_T)ing_timeout, sc);
 332 }
 333 #endif /* I4BINGACCT */
 334
 335 #if 0
 336 /*---------------------------------------------------------------------------*
 337  *      clear the interface's send queues
 338  *---------------------------------------------------------------------------*/
 339 static void
 340 ingclearqueue(struct ifqueue *iq)
 341 {
 342         int x;
 343         struct mbuf *m;
 344
 345         for(;;)
 346         {
 347                 crit_enter();
 348                 IF_DEQUEUE(iq, m);
 349                 crit_exit();
 350
 351                 if(m)
 352                         m_freem(m);
 353                 else
 354                         break;
 355         }
 356 }
 357 #endif
 358
 359 /*===========================================================================*
 360  *                      ISDN INTERFACE ROUTINES
 361  *===========================================================================*/
 362
 363 /*---------------------------------------------------------------------------*
 364  *      this routine is called from L4 handler at connect time
 365  *---------------------------------------------------------------------------*/
 366 static void
 367 ing_connect(int unit, void *cdp)
 368 {
 369         struct ing_softc *sc = &ing_softc[unit];
 370
 371         sc->sc_cdp = (call_desc_t *)cdp;
 372
 373         crit_enter();
 374
 375         NDBGL4(L4_DIALST, "ing%d: setting dial state to ST_CONNECTED", unit);
 376
 377         sc->sc_dialresp = DSTAT_NONE;
 378         sc->sc_lastdialresp = DSTAT_NONE;
 379
 380 #if I4BINGACCT
 381         sc->sc_iinb = 0;
 382         sc->sc_ioutb = 0;
 383         sc->sc_inb = 0;
 384         sc->sc_outb = 0;
 385         sc->sc_linb = 0;
 386         sc->sc_loutb = 0;
 387         callout_reset(&sc->sc_timeout, I4BINGACCTINTVL * hz,
 388                         (TIMEOUT_FUNC_T)ing_timeout, sc);
 389 #endif
 390
 391         sc->sc_state = ST_CONNECTED;
 392
 393         crit_exit();
 394 }
 395
 396 /*---------------------------------------------------------------------------*
 397  *      this routine is called from L4 handler at disconnect time
 398  *---------------------------------------------------------------------------*/
 399 static void
 400 ing_disconnect(int unit, void *cdp)
 401 {
 402         call_desc_t *cd = (call_desc_t *)cdp;
 403         struct ing_softc *sc = &ing_softc[unit];
 404
 405         /* new stuff to check that the active channel is being closed */
 406
 407         if (cd != sc->sc_cdp)
 408         {
 409                 NDBGL4(L4_INGDBG, "ing%d: channel %d not active",
 410                                 cd->driver_unit, cd->channelid);
 411                 return;
 412         }
 413
 414 #if I4BINGACCT
 415         callout_stop(&sc->sc_timeout);
 416 #endif
 417
 418         i4b_l4_accounting(BDRV_ING, cd->driver_unit, ACCT_FINAL,
 419                  sc->sc_ioutb, sc->sc_iinb, 0, 0, sc->sc_outb, sc->sc_inb);
 420
 421         sc->sc_cdp = NULL;
 422
 423         NDBGL4(L4_DIALST, "setting dial state to ST_IDLE");
 424
 425         sc->sc_dialresp = DSTAT_NONE;
 426         sc->sc_lastdialresp = DSTAT_NONE;
 427
 428         sc->sc_state = ST_IDLE;
 429 }
 430
 431 /*---------------------------------------------------------------------------*
 432  *      this routine is used to give a feedback from userland daemon
 433  *      in case of dial problems
 434  *---------------------------------------------------------------------------*/
 435 static void
 436 ing_dialresponse(int unit, int status, cause_t cause)
 437 {
 438         struct ing_softc *sc = &ing_softc[unit];
 439         sc->sc_dialresp = status;
 440
 441         NDBGL4(L4_INGDBG, "ing%d: last=%d, this=%d",
 442                 unit, sc->sc_lastdialresp, sc->sc_dialresp);
 443
 444         if(status != DSTAT_NONE)
 445         {
 446                 NDBGL4(L4_INGDBG, "ing%d: clearing queues", unit);
 447 /*              ingclearqueues(sc); */
 448         }
 449 }
 450
 451 /*---------------------------------------------------------------------------*
 452  *      interface soft up/down
 453  *---------------------------------------------------------------------------*/
 454 static void
 455 ing_updown(int unit, int updown)
 456 {
 457         struct ing_softc *sc = &ing_softc[unit];
 458         sc->sc_updown = updown;
 459 }
 460
 461 /*---------------------------------------------------------------------------*
 462  *      this routine is called from the HSCX interrupt handler
 463  *      when a new frame (mbuf) has been received and was put on
 464  *      the rx queue. It is assumed that this routines runs at
 465  *      pri level splimp() ! Keep it short !
 466  *---------------------------------------------------------------------------*/
 467 static void
 468 ing_rx_data_rdy(int unit)
 469 {
 470         struct ing_softc *sc = &ing_softc[unit];
 471         struct mbuf *m;
 472
 473         if((m = *isdn_linktab[unit]->rx_mbuf) == NULL)
 474                 return;
 475
 476 #if I4BINGACCT
 477         sc->sc_inb += m->m_pkthdr.len;
 478 #endif
 479
 480         m->m_pkthdr.rcvif = NULL;
 481
 482         sc->sc_inpkt++;
 483
 484         ng_queue_data(sc->hook, m, NULL);
 485 }
 486
 487 /*---------------------------------------------------------------------------*
 488  *      this routine is called from the HSCX interrupt handler
 489  *      when the last frame has been sent out and there is no
 490  *      further frame (mbuf) in the tx queue.
 491  *---------------------------------------------------------------------------*/
 492 static void
 493 ing_tx_queue_empty(int unit)
 494 {
 495         struct ing_softc *sc = &ing_softc[unit];
 496         struct mbuf *m;
 497         int x = 0;
 498
 499         if(sc->sc_state != ST_CONNECTED)
 500                 return;
 501
 502         for(;;)
 503         {
 504                 IF_DEQUEUE(&sc->xmitq_hipri, m);
 505
 506                 if(m == NULL)
 507                 {
 508                         IF_DEQUEUE(&sc->xmitq, m);
 509                         if(m == NULL)
 510                                 break;
 511                 }
 512
 513 #if I4BINGACCT
 514                 sc->sc_outb += m->m_pkthdr.len;
 515 #endif
 516
 517                 x = 1;
 518
 519                 if(IF_QFULL(isdn_linktab[unit]->tx_queue))
 520                 {
 521                         NDBGL4(L4_INGDBG, "ing%d: tx queue full!", unit);
 522                         m_freem(m);
 523                 }
 524                 else
 525                 {
 526                         IF_ENQUEUE(isdn_linktab[unit]->tx_queue, m);
 527                 }
 528         }
 529
 530         if(x)
 531                 (*isdn_linktab[unit]->bch_tx_start)(isdn_linktab[unit]->unit, isdn_linktab[unit]->channel);
 532 }
 533
 534 /*---------------------------------------------------------------------------*
 535  *      this routine is called from the HSCX interrupt handler
 536  *      each time a packet is received or transmitted. It should
 537  *      be used to implement an activity timeout mechanism.
 538  *---------------------------------------------------------------------------*/
 539 static void
 540 ing_activity(int unit, int rxtx)
 541 {
 542         ing_softc[unit].sc_cdp->last_active_time = SECOND;
 543 }
 544
 545 /*---------------------------------------------------------------------------*
 546  *      return this drivers linktab address
 547  *---------------------------------------------------------------------------*/
 548 drvr_link_t *
 549 ing_ret_linktab(int unit)
 550 {
 551         return(&ing_drvr_linktab[unit]);
 552 }
 553
 554 /*---------------------------------------------------------------------------*
 555  *      setup the isdn_linktab for this driver
 556  *---------------------------------------------------------------------------*/
 557 void
 558 ing_set_linktab(int unit, isdn_link_t *ilt)
 559 {
 560         isdn_linktab[unit] = ilt;
 561 }
 562
 563 /*---------------------------------------------------------------------------*
 564  *      initialize this drivers linktab
 565  *---------------------------------------------------------------------------*/
 566 static void
 567 ing_init_linktab(int unit)
 568 {
 569         ing_drvr_linktab[unit].unit = unit;
 570         ing_drvr_linktab[unit].bch_rx_data_ready = ing_rx_data_rdy;
 571         ing_drvr_linktab[unit].bch_tx_queue_empty = ing_tx_queue_empty;
 572         ing_drvr_linktab[unit].bch_activity = ing_activity;
 573         ing_drvr_linktab[unit].line_connected = ing_connect;
 574         ing_drvr_linktab[unit].line_disconnected = ing_disconnect;
 575         ing_drvr_linktab[unit].dial_response = ing_dialresponse;
 576         ing_drvr_linktab[unit].updown_ind = ing_updown;
 577 }
 578
 579 /*===========================================================================*
 580  *                      NETGRAPH INTERFACE ROUTINES
 581  *===========================================================================*/
 582
 583 /*---------------------------------------------------------------------------*
 584  * It is not possible or allowable to create a node of this type.
 585  * If the hardware exists, it will already have created it.
 586  *---------------------------------------------------------------------------*/
 587 static int
 588 ng_ing_constructor(node_p *nodep)
 589 {
 590         return(EINVAL);
 591 }
 592
 593 /*---------------------------------------------------------------------------*
 594  * Give our ok for a hook to be added...
 595  * Add the hook's private info to the hook structure.
 596  *---------------------------------------------------------------------------*/
 597 static int
 598 ng_ing_newhook(node_p node, hook_p hook, const char *name)
 599 {
 600         struct ing_softc *sc = node->private;
 601
 602         /*
 603          * check if it's our friend the debug hook
 604          */
 605         if(strcmp(name, NG_ING_HOOK_DEBUG) == 0)
 606         {
 607                 hook->private = NULL; /* paranoid */
 608                 sc->debughook = hook;
 609                 return (0);
 610         }
 611         /*
 612          * Check for raw mode hook.
 613          */
 614         if(strcmp(name, NG_ING_HOOK_RAW) == 0)
 615         {
 616                 hook->private = sc;
 617                 sc->hook = hook;
 618                 return (0);
 619         }
 620
 621         return (EINVAL);
 622 }
 623
 624 /*---------------------------------------------------------------------------*
 625  * Get a netgraph control message.
 626  * Check it is one we understand. If needed, send a response.
 627  * We could save the address for an async action later, but don't here.
 628  * Always free the message.
 629  * The response should be in a malloc'd region that the caller can 'free'.
 630  * A response is not required.
 631  *---------------------------------------------------------------------------*/
 632 static int
 633 ng_ing_rcvmsg(node_p node, struct ng_mesg *msg, const char *retaddr,
 634                                                         struct ng_mesg **rptr)
 635 {
 636         struct ing_softc *sc = node->private;
 637
 638         struct ng_mesg *resp = NULL;
 639         int error = 0;
 640
 641         if(msg->header.typecookie == NGM_GENERIC_COOKIE)
 642         {
 643                 switch(msg->header.cmd)
 644                 {
 645                         case NGM_TEXT_STATUS:
 646                         {
 647                                 char *arg;
 648                                 char *p;
 649                                 int pos = 0;
 650
 651                                 NG_MKRESPONSE(resp, msg,
 652                                     sizeof(struct ng_mesg) + NG_TEXTRESPONSE,
 653                                     M_INTWAIT | M_NULLOK);
 654
 655                                 if (resp == NULL)
 656                                 {
 657                                         error = ENOMEM;
 658                                         break;
 659                                 }
 660                                 arg = (char *) resp->data;
 661
 662                                 switch(sc->sc_state)
 663                                 {
 664                                         case ST_IDLE:
 665                                                 p = "idle";
 666                                                 break;
 667                                         case ST_DIALING:
 668                                                 p = "dialing";
 669                                                 break;
 670                                         case ST_CONNECTED:
 671                                                 p = "connected";
 672                                                 break;
 673                                         default:
 674                                                 p = "???";
 675                                                 break;
 676                                 }
 677
 678                                 pos = ksprintf(arg, "state = %s (%d)\n", p, sc->sc_state);
 679 #if I4BINGACCT
 680                                 pos += ksprintf(arg + pos, "%d bytes in, %d bytes out\n", sc->sc_inb, sc->sc_outb);
 681 #endif
 682                                 pos += ksprintf(arg + pos, "%d pkts in, %d pkts out\n", sc->sc_inpkt, sc->sc_outpkt);
 683
 684                                 resp->header.arglen = pos + 1;
 685                                 break;
 686                         }
 687
 688                         default:
 689                                 error = EINVAL;
 690                                 break;
 691                 }
 692         }
 693         else if(msg->header.typecookie == NGM_ING_COOKIE)
 694         {
 695                 switch (msg->header.cmd)
 696                 {
 697                         case NGM_ING_GET_STATUS:
 698                         {
 699                                 struct ngingstat *stats;
 700
 701                                 NG_MKRESPONSE(resp, msg, sizeof(*stats),
 702                                     M_INTWAIT | M_NULLOK);
 703
 704                                 if (!resp)
 705                                 {
 706                                         error = ENOMEM;
 707                                         break;
 708                                 }
 709
 710                                 stats = (struct ngingstat *) resp->data;
 711                                 stats->packets_in = sc->packets_in;
 712                                 stats->packets_out = sc->packets_out;
 713                                 break;
 714                         }
 715
 716                         case NGM_ING_SET_FLAG:
 717                                 if (msg->header.arglen != sizeof(u_int32_t))
 718                                 {
 719                                         error = EINVAL;
 720                                         break;
 721                                 }
 722                                 sc->flags = *((u_int32_t *) msg->data);
 723                                 break;
 724
 725                         default:
 726                                 error = EINVAL;         /* unknown command */
 727                                 break;
 728                 }
 729         }
 730         else
 731         {
 732                 error = EINVAL;                 /* unknown cookie type */
 733         }
 734
 735         /* Take care of synchronous response, if any */
 736
 737         if (rptr)
 738                 *rptr = resp;
 739         else if (resp)
 740                 FREE(resp, M_NETGRAPH);
 741
 742         /* Free the message and return */
 743
 744         FREE(msg, M_NETGRAPH);
 745         return(error);
 746 }
 747
 748 /*---------------------------------------------------------------------------*
 749  * get data from another node and transmit it out on a B-channel
 750  *---------------------------------------------------------------------------*/
 751 static int
 752 ng_ing_rcvdata(hook_p hook, struct mbuf *m, meta_p meta)
 753 {
 754         struct ing_softc *sc = hook->node->private;
 755         struct ifqueue  *xmitq_p;
 756
 757         if(hook->private == NULL)
 758         {
 759                 NG_FREE_DATA(m, meta);
 760                 return(ENETDOWN);
 761         }
 762
 763         if(sc->sc_state == ST_IDLE || sc->sc_state == ST_DIALING)
 764         {
 765                 i4b_l4_dialout(BDRV_ING, sc->sc_unit);
 766                 sc->sc_state = ST_DIALING;
 767         }
 768
 769         sc->sc_outpkt++;
 770
 771        /*
 772         * Now queue the data for when it can be sent
 773         */
 774
 775         if (meta && meta->priority > 0)
 776         {
 777                 xmitq_p = (&sc->xmitq_hipri);
 778         }
 779         else
 780         {
 781                 xmitq_p = (&sc->xmitq);
 782         }
 783
 784         crit_enter();
 785
 786         if (IF_QFULL(xmitq_p))
 787         {
 788                 IF_DROP(xmitq_p);
 789                 crit_exit();
 790                 NG_FREE_DATA(m, meta);
 791                 return(ENOBUFS);
 792         }
 793
 794         IF_ENQUEUE(xmitq_p, m);
 795
 796         ing_tx_queue_empty(sc->sc_unit);
 797
 798         crit_exit();
 799         return (0);
 800 }
 801
 802 /*---------------------------------------------------------------------------*
 803  * Do local shutdown processing..
 804  * If we are a persistant device, we might refuse to go away, and
 805  * we'd only remove our links and reset ourself.
 806  *---------------------------------------------------------------------------*/
 807 static int
 808 ng_ing_rmnode(node_p node)
 809 {
 810         struct ing_softc *sc = node->private;
 811
 812         node->flags |= NG_INVALID;
 813         ng_cutlinks(node);
 814
 815         sc->packets_in = 0;             /* reset stats */
 816         sc->packets_out = 0;
 817
 818         node->flags &= ~NG_INVALID;     /* reset invalid flag */
 819
 820         return (0);
 821 }
 822
 823 /*---------------------------------------------------------------------------*
 824  * This is called once we've already connected a new hook to the other node.
 825  *---------------------------------------------------------------------------*/
 826 static int
 827 ng_ing_connect(hook_p hook)
 828 {
 829         return (0);
 830 }
 831
 832 /*
 833  * Dook disconnection
 834  *
 835  * For this type, removal of the last link destroys the node
 836  */
 837 static int
 838 ng_ing_disconnect(hook_p hook)
 839 {
 840         struct ing_softc *sc = hook->node->private;
 841
 842         if(hook->private == NULL) {
 843                 sc->debughook = NULL;
 844         }
 845         return (0);
 846 }
 847
 848 /*===========================================================================*/
 849
 850 #endif /* NI4BING > 0 */