sys/i4b/driver/i4b_ing.c

   1 /*-
   2  * Copyright (c) 1999, 2002 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  *
  28  *      i4b_ing.c - isdn4bsd B-channel to netgraph driver
  29  *      -------------------------------------------------
  30  *      last edit-date: [Sat Mar  9 14:09:53 2002]
  31  *
  32  *---------------------------------------------------------------------------*/
  33
  34 #include <sys/cdefs.h>
  35 __FBSDID("$FreeBSD$");
  36
  37 #include "opt_i4b.h"
  38
  39 #include <sys/param.h>
  40 #include <sys/systm.h>
  41 #include <sys/kernel.h>
  42 #include <sys/mbuf.h>
  43 #include <sys/socket.h>
  44 #include <sys/errno.h>
  45 #include <sys/malloc.h>
  46
  47 #include <net/if.h>
  48
  49 #include <netgraph/ng_message.h>
  50 #include <netgraph/ng_parse.h>
  51 #include <netgraph/netgraph.h>
  52
  53 #include <machine/i4b_ioctl.h>
  54 #include <machine/i4b_debug.h>
  55
  56 #include <i4b/include/i4b_global.h>
  57 #include <i4b/include/i4b_l3l4.h>
  58
  59 #include <i4b/layer4/i4b_l4.h>
  60
  61 #define I4BINGACCT      1               /* enable accounting messages */
  62 #define I4BINGACCTINTVL 2               /* accounting msg interval in secs */
  63
  64 #define I4BINGMAXQLEN   50              /* max queue length */
  65
  66 /* initialized by L4 */
  67
  68 static drvr_link_t ing_drvr_linktab[NI4BING];
  69 static isdn_link_t *isdn_linktab[NI4BING];
  70
  71 struct ing_softc {
  72         int             sc_unit;        /* unit number                  */
  73         int             sc_state;       /* state of the interface       */
  74         call_desc_t     *sc_cdp;        /* ptr to call descriptor       */
  75         int             sc_updown;      /* soft state of interface      */
  76         struct ifqueue  sc_fastq;       /* interactive traffic          */
  77         int             sc_dialresp;    /* dialresponse                 */
  78         int             sc_lastdialresp;/* last dialresponse            */
  79
  80 #if I4BINGACCT
  81         struct callout_handle sc_callout;
  82         int             sc_iinb;        /* isdn driver # of inbytes     */
  83         int             sc_ioutb;       /* isdn driver # of outbytes    */
  84         int             sc_inb;         /* # of bytes rx'd              */
  85         int             sc_outb;        /* # of bytes tx'd              */
  86         int             sc_linb;        /* last # of bytes rx'd         */
  87         int             sc_loutb;       /* last # of bytes tx'd         */
  88         int             sc_fn;          /* flag, first null acct        */
  89 #endif
  90
  91         int             sc_inpkt;       /* incoming packets             */
  92         int             sc_outpkt;      /* outgoing packets             */
  93
  94         struct ifqueue  xmitq_hipri;    /* hi-priority transmit queue */
  95         struct ifqueue  xmitq;    /* transmit queue */
  96
  97         node_p          node;           /* back pointer to node */
  98         char            nodename[NG_NODESIZ]; /* store our node name */
  99         hook_p          debughook;
 100         hook_p          hook;
 101
 102         u_int           packets_in;     /* packets in from downstream */
 103         u_int           packets_out;    /* packets out towards downstream */
 104         u_int32_t       flags;
 105
 106 } ing_softc[NI4BING];
 107
 108 enum ing_states {
 109         ST_IDLE,                        /* initialized, ready, idle     */
 110         ST_DIALING,                     /* dialling out to remote       */
 111         ST_CONNECTED                    /* connected to remote          */
 112 };
 113
 114 static void i4bingattach(void *);
 115
 116 PSEUDO_SET(i4bingattach, i4b_ing);
 117
 118 static void ing_init_linktab(int unit);
 119 static void ing_tx_queue_empty(int unit);
 120
 121 /* ========= NETGRAPH ============= */
 122
 123 #define NG_ING_NODE_TYPE        "i4bing"        /* node type name */
 124 #define NGM_ING_COOKIE          947513046       /* node type cookie */
 125
 126 /* Hook names */
 127 #define NG_ING_HOOK_DEBUG       "debug"
 128 #define NG_ING_HOOK_RAW         "rawdata"
 129
 130 /* Netgraph commands understood by this node type */
 131 enum {
 132         NGM_ING_SET_FLAG = 1,
 133         NGM_ING_GET_STATUS,
 134 };
 135
 136 /* This structure is returned by the NGM_ING_GET_STATUS command */
 137 struct ngingstat {
 138         u_int   packets_in;     /* packets in from downstream */
 139         u_int   packets_out;    /* packets out towards downstream */
 140 };
 141
 142 /*
 143  * This is used to define the 'parse type' for a struct ngingstat, which
 144  * is bascially a description of how to convert a binary struct ngingstat
 145  * to an ASCII string and back.  See ng_parse.h for more info.
 146  *
 147  * This needs to be kept in sync with the above structure definition
 148  */
 149 #define NG_ING_STATS_TYPE_INFO  {                               \
 150           { "packets_in",       &ng_parse_int32_type    },      \
 151           { "packets_out",      &ng_parse_int32_type    },      \
 152           { NULL },                                             \
 153 }
 154
 155 /*
 156  * This section contains the netgraph method declarations for the
 157  * sample node. These methods define the netgraph 'type'.
 158  */
 159
 160 static ng_constructor_t ng_ing_constructor;
 161 static ng_rcvmsg_t      ng_ing_rcvmsg;
 162 static ng_shutdown_t    ng_ing_shutdown;
 163 static ng_newhook_t     ng_ing_newhook;
 164 static ng_connect_t     ng_ing_connect;
 165 static ng_rcvdata_t     ng_ing_rcvdata;
 166 static ng_disconnect_t  ng_ing_disconnect;
 167
 168 /* Parse type for struct ngingstat */
 169 static const struct
 170         ng_parse_struct_field ng_ing_stat_type_fields[] =
 171         NG_ING_STATS_TYPE_INFO;
 172
 173 static const struct ng_parse_type ng_ing_stat_type = {
 174         &ng_parse_struct_type,
 175         &ng_ing_stat_type_fields
 176 };
 177
 178 /* List of commands and how to convert arguments to/from ASCII */
 179
 180 static const struct ng_cmdlist ng_ing_cmdlist[] = {
 181         {
 182                 NGM_ING_COOKIE,
 183                 NGM_ING_GET_STATUS,
 184                 "getstatus",
 185                 NULL,
 186                 &ng_ing_stat_type,
 187         },
 188         {
 189                 NGM_ING_COOKIE,
 190                 NGM_ING_SET_FLAG,
 191                 "setflag",
 192                 &ng_parse_int32_type,
 193                 NULL
 194         },
 195         { 0 }
 196 };
 197
 198 /* Netgraph node type descriptor */
 199 static struct ng_type typestruct = {
 200         .version =      NG_ABI_VERSION,
 201         .name =         NG_ING_NODE_TYPE,
 202         .constructor =  ng_ing_constructor,
 203         .rcvmsg =       ng_ing_rcvmsg,
 204         .shutdown =     ng_ing_shutdown,
 205         .newhook =      ng_ing_newhook,
 206         .connect =      ng_ing_connect,
 207         .rcvdata =      ng_ing_rcvdata,
 208         .disconnect =   ng_ing_disconnect,
 209         .cmdlist =      ng_ing_cmdlist,
 210 };
 211
 212 NETGRAPH_INIT_ORDERED(ing, &typestruct, SI_SUB_DRIVERS, SI_ORDER_ANY);
 213
 214 /*===========================================================================*
 215  *                      DEVICE DRIVER ROUTINES
 216  *===========================================================================*/
 217
 218 /*---------------------------------------------------------------------------*
 219  *      interface attach routine at kernel boot time
 220  *---------------------------------------------------------------------------*/
 221 static void
 222 i4bingattach(void *dummy)
 223 {
 224         struct ing_softc *sc = ing_softc;
 225         int i;
 226         int ret;
 227
 228         printf("i4bing: %d i4b NetGraph ISDN B-channel device(s) attached\n", NI4BING);
 229
 230         for(i=0; i < NI4BING; sc++, i++)
 231         {
 232                 sc->sc_unit = i;
 233
 234                 ing_init_linktab(i);
 235
 236                 NDBGL4(L4_DIALST, "setting dial state to ST_IDLE");
 237
 238                 sc->sc_state = ST_IDLE;
 239
 240                 sc->sc_fastq.ifq_maxlen = I4BINGMAXQLEN;
 241                 if(!mtx_initialized(&sc->sc_fastq.ifq_mtx))
 242                         mtx_init(&sc->sc_fastq.ifq_mtx, "i4b_ing_fastq", NULL, MTX_DEF);
 243
 244 #if I4BINGACCT
 245                 callout_handle_init(&sc->sc_callout);
 246                 sc->sc_iinb = 0;
 247                 sc->sc_ioutb = 0;
 248                 sc->sc_inb = 0;
 249                 sc->sc_outb = 0;
 250                 sc->sc_linb = 0;
 251                 sc->sc_loutb = 0;
 252                 sc->sc_fn = 1;
 253 #endif
 254
 255                 sc->sc_inpkt = 0;
 256                 sc->sc_outpkt = 0;
 257
 258                 sc->sc_updown = SOFT_ENA;       /* soft enabled */
 259
 260                 sc->sc_dialresp = DSTAT_NONE;   /* no response */
 261                 sc->sc_lastdialresp = DSTAT_NONE;
 262
 263                 /* setup a netgraph node */
 264
 265                 if ((ret = ng_make_node_common(&typestruct, &sc->node)))
 266                 {
 267                         printf("ing: ng_make_node_common, ret = %d\n!", ret);
 268                 }
 269
 270                 /* name the netgraph node */
 271
 272                 sprintf(sc->nodename, "%s%d", NG_ING_NODE_TYPE, sc->sc_unit);
 273                 if((ret = ng_name_node(sc->node, sc->nodename)))
 274                 {
 275                         printf("ing: ng_name node, ret = %d\n!", ret);
 276                         NG_NODE_UNREF(sc->node);
 277                         break;
 278                 }
 279
 280                 NG_NODE_SET_PRIVATE(sc->node, sc);
 281
 282                 sc->xmitq.ifq_maxlen = IFQ_MAXLEN;
 283                 sc->xmitq_hipri.ifq_maxlen = IFQ_MAXLEN;
 284                 if(!mtx_initialized(&sc->xmitq.ifq_mtx))
 285                         mtx_init(&sc->xmitq.ifq_mtx, "i4b_ing_xmitq", NULL, MTX_DEF);
 286                 if(!mtx_initialized(&sc->xmitq_hipri.ifq_mtx))
 287                         mtx_init(&sc->xmitq_hipri.ifq_mtx, "i4b_ing_hipri", NULL, MTX_DEF);
 288         }
 289 }
 290
 291 #ifdef I4BINGACCT
 292 /*---------------------------------------------------------------------------*
 293  *      accounting timeout routine
 294  *---------------------------------------------------------------------------*/
 295 static void
 296 ing_timeout(struct ing_softc *sc)
 297 {
 298         bchan_statistics_t bs;
 299         int unit = sc->sc_unit;
 300
 301         /* get # of bytes in and out from the HSCX driver */
 302
 303         (*isdn_linktab[unit]->bch_stat)
 304                 (isdn_linktab[unit]->unit, isdn_linktab[unit]->channel, &bs);
 305
 306         sc->sc_ioutb += bs.outbytes;
 307         sc->sc_iinb += bs.inbytes;
 308
 309         if((sc->sc_iinb != sc->sc_linb) || (sc->sc_ioutb != sc->sc_loutb) || sc->sc_fn)
 310         {
 311                 int ri = (sc->sc_iinb - sc->sc_linb)/I4BINGACCTINTVL;
 312                 int ro = (sc->sc_ioutb - sc->sc_loutb)/I4BINGACCTINTVL;
 313
 314                 if((sc->sc_iinb == sc->sc_linb) && (sc->sc_ioutb == sc->sc_loutb))
 315                         sc->sc_fn = 0;
 316                 else
 317                         sc->sc_fn = 1;
 318
 319                 sc->sc_linb = sc->sc_iinb;
 320                 sc->sc_loutb = sc->sc_ioutb;
 321
 322                 i4b_l4_accounting(BDRV_ING, unit, ACCT_DURING,
 323                          sc->sc_ioutb, sc->sc_iinb, ro, ri, sc->sc_ioutb, sc->sc_iinb);
 324         }
 325
 326         sc->sc_callout = timeout((TIMEOUT_FUNC_T)ing_timeout,
 327                                         (void *)sc, I4BINGACCTINTVL*hz);
 328 }
 329 #endif /* I4BINGACCT */
 330
 331 #if 0
 332 /*---------------------------------------------------------------------------*
 333  *      clear the interface's send queues
 334  *---------------------------------------------------------------------------*/
 335 static void
 336 ingclearqueue(struct ifqueue *iq)
 337 {
 338         int x;
 339
 340         x = splimp();
 341         IF_DRAIN(iq);
 342         splx(x);
 343 }
 344 #endif
 345
 346 /*===========================================================================*
 347  *                      ISDN INTERFACE ROUTINES
 348  *===========================================================================*/
 349
 350 /*---------------------------------------------------------------------------*
 351  *      this routine is called from L4 handler at connect time
 352  *---------------------------------------------------------------------------*/
 353 static void
 354 ing_connect(int unit, void *cdp)
 355 {
 356         struct ing_softc *sc = &ing_softc[unit];
 357         int s;
 358
 359         sc->sc_cdp = (call_desc_t *)cdp;
 360
 361         s = SPLI4B();
 362
 363         NDBGL4(L4_DIALST, "ing%d: setting dial state to ST_CONNECTED", unit);
 364
 365         sc->sc_dialresp = DSTAT_NONE;
 366         sc->sc_lastdialresp = DSTAT_NONE;
 367
 368 #if I4BINGACCT
 369         sc->sc_iinb = 0;
 370         sc->sc_ioutb = 0;
 371         sc->sc_inb = 0;
 372         sc->sc_outb = 0;
 373         sc->sc_linb = 0;
 374         sc->sc_loutb = 0;
 375         sc->sc_callout = timeout((TIMEOUT_FUNC_T)ing_timeout,
 376                                 (void *)sc, I4BINGACCTINTVL*hz);
 377 #endif
 378
 379         sc->sc_state = ST_CONNECTED;
 380
 381         splx(s);
 382 }
 383
 384 /*---------------------------------------------------------------------------*
 385  *      this routine is called from L4 handler at disconnect time
 386  *---------------------------------------------------------------------------*/
 387 static void
 388 ing_disconnect(int unit, void *cdp)
 389 {
 390         call_desc_t *cd = (call_desc_t *)cdp;
 391         struct ing_softc *sc = &ing_softc[unit];
 392
 393         /* new stuff to check that the active channel is being closed */
 394
 395         if (cd != sc->sc_cdp)
 396         {
 397                 NDBGL4(L4_INGDBG, "ing%d: channel %d not active",
 398                                 cd->driver_unit, cd->channelid);
 399                 return;
 400         }
 401
 402 #if I4BINGACCT
 403         untimeout((TIMEOUT_FUNC_T)ing_timeout,
 404                 (void *)sc, sc->sc_callout);
 405 #endif
 406
 407         i4b_l4_accounting(BDRV_ING, cd->driver_unit, ACCT_FINAL,
 408                  sc->sc_ioutb, sc->sc_iinb, 0, 0, sc->sc_outb, sc->sc_inb);
 409
 410         sc->sc_cdp = (call_desc_t *)0;
 411
 412         NDBGL4(L4_DIALST, "setting dial state to ST_IDLE");
 413
 414         sc->sc_dialresp = DSTAT_NONE;
 415         sc->sc_lastdialresp = DSTAT_NONE;
 416
 417         sc->sc_state = ST_IDLE;
 418 }
 419
 420 /*---------------------------------------------------------------------------*
 421  *      this routine is used to give a feedback from userland daemon
 422  *      in case of dial problems
 423  *---------------------------------------------------------------------------*/
 424 static void
 425 ing_dialresponse(int unit, int status, cause_t cause)
 426 {
 427         struct ing_softc *sc = &ing_softc[unit];
 428         sc->sc_dialresp = status;
 429
 430         NDBGL4(L4_INGDBG, "ing%d: last=%d, this=%d",
 431                 unit, sc->sc_lastdialresp, sc->sc_dialresp);
 432
 433         if(status != DSTAT_NONE)
 434         {
 435                 NDBGL4(L4_INGDBG, "ing%d: clearing queues", unit);
 436 /*              ingclearqueues(sc); */
 437         }
 438 }
 439
 440 /*---------------------------------------------------------------------------*
 441  *      interface soft up/down
 442  *---------------------------------------------------------------------------*/
 443 static void
 444 ing_updown(int unit, int updown)
 445 {
 446         struct ing_softc *sc = &ing_softc[unit];
 447         sc->sc_updown = updown;
 448 }
 449
 450 /*---------------------------------------------------------------------------*
 451  *      this routine is called from the HSCX interrupt handler
 452  *      when a new frame (mbuf) has been received and was put on
 453  *      the rx queue. It is assumed that this routines runs at
 454  *      pri level splimp() ! Keep it short !
 455  *---------------------------------------------------------------------------*/
 456 static void
 457 ing_rx_data_rdy(int unit)
 458 {
 459         register struct ing_softc *sc = &ing_softc[unit];
 460         register struct mbuf *m;
 461         int error;
 462
 463         if((m = *isdn_linktab[unit]->rx_mbuf) == NULL)
 464                 return;
 465
 466 #if I4BINGACCT
 467         sc->sc_inb += m->m_pkthdr.len;
 468 #endif
 469
 470         m->m_pkthdr.rcvif = NULL;
 471
 472         sc->sc_inpkt++;
 473
 474         NG_SEND_DATA_ONLY(error, sc->hook, m);
 475 }
 476
 477 /*---------------------------------------------------------------------------*
 478  *      this routine is called from the HSCX interrupt handler
 479  *      when the last frame has been sent out and there is no
 480  *      further frame (mbuf) in the tx queue.
 481  *---------------------------------------------------------------------------*/
 482 static void
 483 ing_tx_queue_empty(int unit)
 484 {
 485         register struct ing_softc *sc = &ing_softc[unit];
 486         register struct mbuf *m;
 487         int x = 0;
 488
 489         if(sc->sc_state != ST_CONNECTED)
 490                 return;
 491
 492         for(;;)
 493         {
 494                 IF_DEQUEUE(&sc->xmitq_hipri, m);
 495
 496                 if(m == NULL)
 497                 {
 498                         IF_DEQUEUE(&sc->xmitq, m);
 499                         if(m == NULL)
 500                                 break;
 501                 }
 502
 503 #if I4BINGACCT
 504                 sc->sc_outb += m->m_pkthdr.len;
 505 #endif
 506
 507                 x = 1;
 508
 509                 if(! IF_HANDOFF(isdn_linktab[unit]->tx_queue, m, NULL))
 510                 {
 511                         NDBGL4(L4_INGDBG, "ing%d: tx queue full!", unit);
 512                 }
 513         }
 514
 515         if(x)
 516                 (*isdn_linktab[unit]->bch_tx_start)(isdn_linktab[unit]->unit, isdn_linktab[unit]->channel);
 517 }
 518
 519 /*---------------------------------------------------------------------------*
 520  *      this routine is called from the HSCX interrupt handler
 521  *      each time a packet is received or transmitted. It should
 522  *      be used to implement an activity timeout mechanism.
 523  *---------------------------------------------------------------------------*/
 524 static void
 525 ing_activity(int unit, int rxtx)
 526 {
 527         ing_softc[unit].sc_cdp->last_active_time = SECOND;
 528 }
 529
 530 /*---------------------------------------------------------------------------*
 531  *      return this drivers linktab address
 532  *---------------------------------------------------------------------------*/
 533 drvr_link_t *
 534 ing_ret_linktab(int unit)
 535 {
 536         return(&ing_drvr_linktab[unit]);
 537 }
 538
 539 /*---------------------------------------------------------------------------*
 540  *      setup the isdn_linktab for this driver
 541  *---------------------------------------------------------------------------*/
 542 void
 543 ing_set_linktab(int unit, isdn_link_t *ilt)
 544 {
 545         isdn_linktab[unit] = ilt;
 546 }
 547
 548 /*---------------------------------------------------------------------------*
 549  *      initialize this drivers linktab
 550  *---------------------------------------------------------------------------*/
 551 static void
 552 ing_init_linktab(int unit)
 553 {
 554         ing_drvr_linktab[unit].unit = unit;
 555         ing_drvr_linktab[unit].bch_rx_data_ready = ing_rx_data_rdy;
 556         ing_drvr_linktab[unit].bch_tx_queue_empty = ing_tx_queue_empty;
 557         ing_drvr_linktab[unit].bch_activity = ing_activity;
 558         ing_drvr_linktab[unit].line_connected = ing_connect;
 559         ing_drvr_linktab[unit].line_disconnected = ing_disconnect;
 560         ing_drvr_linktab[unit].dial_response = ing_dialresponse;
 561         ing_drvr_linktab[unit].updown_ind = ing_updown;
 562 }
 563
 564 /*===========================================================================*
 565  *                      NETGRAPH INTERFACE ROUTINES
 566  *===========================================================================*/
 567
 568 /*---------------------------------------------------------------------------*
 569  * It is not possible or allowable to create a node of this type.
 570  * If the hardware exists, it will already have created it.
 571  *---------------------------------------------------------------------------*/
 572 static int
 573 ng_ing_constructor(node_p node)
 574 {
 575         return(EINVAL);
 576 }
 577
 578 /*---------------------------------------------------------------------------*
 579  * Give our ok for a hook to be added...
 580  * Add the hook's private info to the hook structure.
 581  *---------------------------------------------------------------------------*/
 582 static int
 583 ng_ing_newhook(node_p node, hook_p hook, const char *name)
 584 {
 585         struct ing_softc *sc = NG_NODE_PRIVATE(node);
 586
 587         /*
 588          * check if it's our friend the debug hook
 589          */
 590         if(strcmp(name, NG_ING_HOOK_DEBUG) == 0)
 591         {
 592                 NG_HOOK_SET_PRIVATE(hook, NULL); /* paranoid */
 593                 sc->debughook = hook;
 594                 return (0);
 595         }
 596         /*
 597          * Check for raw mode hook.
 598          */
 599         if(strcmp(name, NG_ING_HOOK_RAW) == 0)
 600         {
 601                 NG_HOOK_SET_PRIVATE(hook, sc);
 602                 sc->hook = hook;
 603                 return (0);
 604         }
 605
 606         return (EINVAL);
 607 }
 608
 609 /*---------------------------------------------------------------------------*
 610  * Get a netgraph control message.
 611  * Check it is one we understand. If needed, send a response.
 612  * We could save the address for an async action later, but don't here.
 613  * Always free the message.
 614  * The response should be in a malloc'd region that the caller can 'free'.
 615  * A response is not required.
 616  *---------------------------------------------------------------------------*/
 617 static int
 618 ng_ing_rcvmsg(node_p node, item_p item, hook_p lasthook)
 619 {
 620         struct ing_softc *sc = NG_NODE_PRIVATE(node);
 621
 622         struct ng_mesg *resp = NULL;
 623         int error = 0;
 624         struct ng_mesg *msg;
 625
 626         NGI_GET_MSG(item, msg);
 627
 628         if(msg->header.typecookie == NGM_GENERIC_COOKIE)
 629         {
 630                 switch(msg->header.cmd)
 631                 {
 632                         case NGM_TEXT_STATUS:
 633                         {
 634                                 char *arg;
 635                                 char *p;
 636                                 int pos = 0;
 637
 638                                 NG_MKRESPONSE(resp, msg, sizeof(struct ng_mesg) + NG_TEXTRESPONSE, M_NOWAIT);
 639
 640                                 if (resp == NULL)
 641                                 {
 642                                         error = ENOMEM;
 643                                         break;
 644                                 }
 645                                 arg = (char *) resp->data;
 646
 647                                 switch(sc->sc_state)
 648                                 {
 649                                         case ST_IDLE:
 650                                                 p = "idle";
 651                                                 break;
 652                                         case ST_DIALING:
 653                                                 p = "dialing";
 654                                                 break;
 655                                         case ST_CONNECTED:
 656                                                 p = "connected";
 657                                                 break;
 658                                         default:
 659                                                 p = "???";
 660                                                 break;
 661                                 }
 662
 663                                 pos = sprintf(arg, "state = %s (%d)\n", p, sc->sc_state);
 664 #if I4BINGACCT
 665                                 pos += sprintf(arg + pos, "%d bytes in, %d bytes out\n", sc->sc_inb, sc->sc_outb);
 666 #endif
 667                                 pos += sprintf(arg + pos, "%d pkts in, %d pkts out\n", sc->sc_inpkt, sc->sc_outpkt);
 668
 669                                 resp->header.arglen = pos + 1;
 670                                 break;
 671                         }
 672
 673                         default:
 674                                 error = EINVAL;
 675                                 break;
 676                 }
 677         }
 678         else if(msg->header.typecookie == NGM_ING_COOKIE)
 679         {
 680                 switch (msg->header.cmd)
 681                 {
 682                         case NGM_ING_GET_STATUS:
 683                         {
 684                                 struct ngingstat *stats;
 685
 686                                 NG_MKRESPONSE(resp, msg, sizeof(*stats), M_NOWAIT);
 687
 688                                 if (!resp)
 689                                 {
 690                                         error = ENOMEM;
 691                                         break;
 692                                 }
 693
 694                                 stats = (struct ngingstat *) resp->data;
 695                                 stats->packets_in = sc->packets_in;
 696                                 stats->packets_out = sc->packets_out;
 697                                 break;
 698                         }
 699
 700                         case NGM_ING_SET_FLAG:
 701                                 if (msg->header.arglen != sizeof(u_int32_t))
 702                                 {
 703                                         error = EINVAL;
 704                                         break;
 705                                 }
 706                                 sc->flags = *((u_int32_t *) msg->data);
 707                                 break;
 708
 709                         default:
 710                                 error = EINVAL;         /* unknown command */
 711                                 break;
 712                 }
 713         }
 714         else
 715         {
 716                 error = EINVAL;                 /* unknown cookie type */
 717         }
 718
 719         /* Take care of synchronous response, if any */
 720         NG_RESPOND_MSG(error, node, item, resp);
 721         /* Free the message and return */
 722         NG_FREE_MSG(msg);
 723         return(error);
 724 }
 725
 726 /*---------------------------------------------------------------------------*
 727  * get data from another node and transmit it out on a B-channel
 728  *---------------------------------------------------------------------------*/
 729 static int
 730 ng_ing_rcvdata(hook_p hook, item_p item)
 731 {
 732         struct ing_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
 733         struct ifqueue  *xmitq_p;
 734         int s;
 735         struct mbuf *m;
 736         struct ng_tag_prio *ptag;
 737
 738         NGI_GET_M(item, m);
 739         NG_FREE_ITEM(item);
 740
 741         if(NG_HOOK_PRIVATE(hook) == NULL)
 742         {
 743                 NG_FREE_M(m);
 744                 return(ENETDOWN);
 745         }
 746
 747         if(sc->sc_state == ST_IDLE || sc->sc_state == ST_DIALING)
 748         {
 749                 i4b_l4_dialout(BDRV_ING, sc->sc_unit);
 750                 sc->sc_state = ST_DIALING;
 751         }
 752
 753         sc->sc_outpkt++;
 754
 755        /*
 756         * Now queue the data for when it can be sent
 757         */
 758         if ((ptag = (struct ng_tag_prio *)m_tag_locate(m, NGM_GENERIC_COOKIE,
 759             NG_TAG_PRIO, NULL)) != NULL && (ptag->priority > NG_PRIO_CUTOFF) )
 760                 xmitq_p = (&sc->xmitq_hipri);
 761         else
 762                 xmitq_p = (&sc->xmitq);
 763
 764         s = splimp();
 765
 766         IF_LOCK(xmitq_p);
 767         if (_IF_QFULL(xmitq_p))
 768         {
 769                 _IF_DROP(xmitq_p);
 770                 IF_UNLOCK(xmitq_p);
 771                 splx(s);
 772                 NG_FREE_M(m);
 773                 return(ENOBUFS);
 774         }
 775
 776         _IF_ENQUEUE(xmitq_p, m);
 777         IF_UNLOCK(xmitq_p);
 778
 779         ing_tx_queue_empty(sc->sc_unit);
 780
 781         splx(s);
 782         return (0);
 783 }
 784
 785 /*---------------------------------------------------------------------------*
 786  * Do local shutdown processing..
 787  * If we are a persistant device, we might refuse to go away, and
 788  * we'd only remove our links and reset ourself.
 789  *---------------------------------------------------------------------------*/
 790 static int
 791 ng_ing_shutdown(node_p node)
 792 {
 793         struct ing_softc *sc = NG_NODE_PRIVATE(node);
 794         int     ret;
 795
 796         NG_NODE_UNREF(node);
 797
 798         sc->packets_in = 0;             /* reset stats */
 799         sc->packets_out = 0;
 800
 801         if ((ret = ng_make_node_common(&typestruct, &sc->node)))
 802         {
 803                 printf("ing: ng_make_node_common, ret = %d\n!", ret);
 804         }
 805
 806         /* name the netgraph node */
 807         sprintf(sc->nodename, "%s%d", NG_ING_NODE_TYPE, sc->sc_unit);
 808         if((ret = ng_name_node(sc->node, sc->nodename)))
 809         {
 810                 printf("ing: ng_name node, ret = %d\n!", ret);
 811                 NG_NODE_UNREF(sc->node);
 812                 return (0);
 813         }
 814
 815         NG_NODE_SET_PRIVATE(sc->node, sc);
 816
 817         return (0);
 818 }
 819
 820 /*---------------------------------------------------------------------------*
 821  * This is called once we've already connected a new hook to the other node.
 822  *---------------------------------------------------------------------------*/
 823 static int
 824 ng_ing_connect(hook_p hook)
 825 {
 826         /* probably not at splnet, force outward queueing */
 827         NG_HOOK_FORCE_QUEUE(NG_HOOK_PEER(hook));
 828         return (0);
 829 }
 830
 831 /*
 832  * Dook disconnection
 833  *
 834  * For this type, removal of the last link destroys the node
 835  */
 836 static int
 837 ng_ing_disconnect(hook_p hook)
 838 {
 839         struct ing_softc *sc = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
 840         int s;
 841
 842         if(NG_HOOK_PRIVATE(hook))
 843         {
 844                 s = splimp();
 845                 splx(s);
 846         }
 847         else
 848         {
 849                 sc->debughook = NULL;
 850         }
 851         return (0);
 852 }
 853
 854 /*===========================================================================*/