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