sys/netgraph/atm/uni/ng_uni.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2001-2003
   5  *      Fraunhofer Institute for Open Communication Systems (FhG Fokus).
   6  *      All rights reserved.
   7  *
   8  * Author: Hartmut Brandt <harti@freebsd.org>
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  * Netgraph module for ATM-Forum UNI 4.0 signalling
  32  */
  33
  34 #include <sys/cdefs.h>
  35 __FBSDID("$FreeBSD$");
  36
  37 #include <sys/param.h>
  38 #include <sys/systm.h>
  39 #include <sys/kernel.h>
  40 #include <sys/malloc.h>
  41 #include <sys/mbuf.h>
  42 #include <sys/errno.h>
  43 #include <sys/syslog.h>
  44 #include <sys/socket.h>
  45 #include <sys/socketvar.h>
  46 #include <sys/callout.h>
  47 #include <sys/sbuf.h>
  48 #include <machine/stdarg.h>
  49
  50 #include <netgraph/ng_message.h>
  51 #include <netgraph/netgraph.h>
  52 #include <netgraph/ng_parse.h>
  53 #include <netnatm/unimsg.h>
  54 #include <netnatm/msg/unistruct.h>
  55 #include <netgraph/atm/ngatmbase.h>
  56 #include <netnatm/saal/sscopdef.h>
  57 #include <netnatm/saal/sscfudef.h>
  58 #include <netgraph/atm/uni/ng_uni_cust.h>
  59 #include <netnatm/sig/uni.h>
  60 #include <netnatm/sig/unisig.h>
  61 #include <netgraph/atm/ng_sscop.h>
  62 #include <netgraph/atm/ng_sscfu.h>
  63 #include <netgraph/atm/ng_uni.h>
  64
  65 static MALLOC_DEFINE(M_NG_UNI, "netgraph_uni_node", "netgraph uni node");
  66 static MALLOC_DEFINE(M_UNI, "netgraph_uni_data", "uni protocol data");
  67
  68 MODULE_DEPEND(ng_uni, ngatmbase, 1, 1, 1);
  69
  70 /*
  71  * Private node data
  72  */
  73 struct priv {
  74         hook_p  upper;
  75         hook_p  lower;
  76         struct uni *uni;
  77         int     enabled;
  78 };
  79
  80 /* UNI CONFIG MASK */
  81 static const struct ng_parse_struct_field ng_uni_config_mask_type_info[] =
  82         NGM_UNI_CONFIG_MASK_INFO;
  83 static const struct ng_parse_type ng_uni_config_mask_type = {
  84         &ng_parse_struct_type,
  85         ng_uni_config_mask_type_info
  86 };
  87
  88 /* UNI_CONFIG */
  89 static const struct ng_parse_struct_field ng_uni_config_type_info[] =
  90         NGM_UNI_CONFIG_INFO;
  91 static const struct ng_parse_type ng_uni_config_type = {
  92         &ng_parse_struct_type,
  93         ng_uni_config_type_info
  94 };
  95
  96 /* SET CONFIG */
  97 static const struct ng_parse_struct_field ng_uni_set_config_type_info[] =
  98         NGM_UNI_SET_CONFIG_INFO;
  99 static const struct ng_parse_type ng_uni_set_config_type = {
 100         &ng_parse_struct_type,
 101         ng_uni_set_config_type_info
 102 };
 103
 104 /*
 105  * Parse DEBUG
 106  */
 107 static const struct ng_parse_fixedarray_info ng_uni_debuglevel_type_info =
 108     NGM_UNI_DEBUGLEVEL_INFO;
 109 static const struct ng_parse_type ng_uni_debuglevel_type = {
 110         &ng_parse_fixedarray_type,
 111         &ng_uni_debuglevel_type_info
 112 };
 113 static const struct ng_parse_struct_field ng_uni_debug_type_info[] =
 114     NGM_UNI_DEBUG_INFO;
 115 static const struct ng_parse_type ng_uni_debug_type = {
 116         &ng_parse_struct_type,
 117         ng_uni_debug_type_info
 118 };
 119
 120 /*
 121  * Command list
 122  */
 123 static const struct ng_cmdlist ng_uni_cmdlist[] = {
 124         {
 125           NGM_UNI_COOKIE,
 126           NGM_UNI_GETDEBUG,
 127           "getdebug",
 128           NULL,
 129           &ng_uni_debug_type
 130         },
 131         {
 132           NGM_UNI_COOKIE,
 133           NGM_UNI_SETDEBUG,
 134           "setdebug",
 135           &ng_uni_debug_type,
 136           NULL
 137         },
 138         {
 139           NGM_UNI_COOKIE,
 140           NGM_UNI_GET_CONFIG,
 141           "get_config",
 142           NULL,
 143           &ng_uni_config_type
 144         },
 145         {
 146           NGM_UNI_COOKIE,
 147           NGM_UNI_SET_CONFIG,
 148           "set_config",
 149           &ng_uni_set_config_type,
 150           &ng_uni_config_mask_type,
 151         },
 152         {
 153           NGM_UNI_COOKIE,
 154           NGM_UNI_ENABLE,
 155           "enable",
 156           NULL,
 157           NULL,
 158         },
 159         {
 160           NGM_UNI_COOKIE,
 161           NGM_UNI_DISABLE,
 162           "disable",
 163           NULL,
 164           NULL,
 165         },
 166         {
 167           NGM_UNI_COOKIE,
 168           NGM_UNI_GETSTATE,
 169           "getstate",
 170           NULL,
 171           &ng_parse_uint32_type
 172         },
 173         { 0 }
 174 };
 175
 176 /*
 177  * Netgraph module data
 178  */
 179 static ng_constructor_t ng_uni_constructor;
 180 static ng_shutdown_t    ng_uni_shutdown;
 181 static ng_rcvmsg_t      ng_uni_rcvmsg;
 182 static ng_newhook_t     ng_uni_newhook;
 183 static ng_disconnect_t  ng_uni_disconnect;
 184 static ng_rcvdata_t     ng_uni_rcvlower;
 185 static ng_rcvdata_t     ng_uni_rcvupper;
 186
 187 static int ng_uni_mod_event(module_t, int, void *);
 188
 189 static struct ng_type ng_uni_typestruct = {
 190         .version =      NG_ABI_VERSION,
 191         .name =         NG_UNI_NODE_TYPE,
 192         .mod_event =    ng_uni_mod_event,
 193         .constructor =  ng_uni_constructor,
 194         .rcvmsg =       ng_uni_rcvmsg,
 195         .shutdown =     ng_uni_shutdown,
 196         .newhook =      ng_uni_newhook,
 197         .rcvdata =      ng_uni_rcvlower,
 198         .disconnect =   ng_uni_disconnect,
 199         .cmdlist =      ng_uni_cmdlist,
 200 };
 201 NETGRAPH_INIT(uni, &ng_uni_typestruct);
 202
 203 static void uni_uni_output(struct uni *, void *, enum uni_sig, u_int32_t,
 204     struct uni_msg *);
 205 static void uni_saal_output(struct uni *, void *, enum saal_sig,
 206     struct uni_msg *);
 207 static void uni_verbose(struct uni *, void *, u_int, const char *, ...)
 208     __printflike(4, 5);
 209 static void uni_do_status(struct uni *, void *, void *, const char *, ...)
 210     __printflike(4, 5);
 211
 212 static const struct uni_funcs uni_funcs = {
 213         uni_uni_output,
 214         uni_saal_output,
 215         uni_verbose,
 216         uni_do_status
 217 };
 218
 219 /************************************************************/
 220 /*
 221  * NODE MANAGEMENT
 222  */
 223 static int
 224 ng_uni_constructor(node_p node)
 225 {
 226         struct priv *priv;
 227
 228         priv = malloc(sizeof(*priv), M_NG_UNI, M_WAITOK | M_ZERO);
 229
 230         if ((priv->uni = uni_create(node, &uni_funcs)) == NULL) {
 231                 free(priv, M_NG_UNI);
 232                 return (ENOMEM);
 233         }
 234
 235         NG_NODE_SET_PRIVATE(node, priv);
 236         NG_NODE_FORCE_WRITER(node);
 237
 238         return (0);
 239 }
 240
 241 static int
 242 ng_uni_shutdown(node_p node)
 243 {
 244         struct priv *priv = NG_NODE_PRIVATE(node);
 245
 246         uni_destroy(priv->uni);
 247
 248         free(priv, M_NG_UNI);
 249         NG_NODE_SET_PRIVATE(node, NULL);
 250
 251         NG_NODE_UNREF(node);
 252
 253         return (0);
 254 }
 255
 256 /************************************************************/
 257 /*
 258  * CONTROL MESSAGES
 259  */
 260 static void
 261 uni_do_status(struct uni *uni, void *uarg, void *sbuf, const char *fmt, ...)
 262 {
 263         va_list ap;
 264
 265         va_start(ap, fmt);
 266         sbuf_printf(sbuf, fmt, ap);
 267         va_end(ap);
 268 }
 269
 270 static int
 271 text_status(node_p node, struct priv *priv, char *buf, u_int len)
 272 {
 273         struct sbuf sbuf;
 274         u_int f;
 275
 276         sbuf_new(&sbuf, buf, len, 0);
 277
 278         if (priv->lower != NULL)
 279                 sbuf_printf(&sbuf, "lower hook: connected to %s:%s\n",
 280                     NG_NODE_NAME(NG_HOOK_NODE(NG_HOOK_PEER(priv->lower))),
 281                     NG_HOOK_NAME(NG_HOOK_PEER(priv->lower)));
 282         else
 283                 sbuf_printf(&sbuf, "lower hook: <not connected>\n");
 284
 285         if (priv->upper != NULL)
 286                 sbuf_printf(&sbuf, "upper hook: connected to %s:%s\n",
 287                     NG_NODE_NAME(NG_HOOK_NODE(NG_HOOK_PEER(priv->upper))),
 288                     NG_HOOK_NAME(NG_HOOK_PEER(priv->upper)));
 289         else
 290                 sbuf_printf(&sbuf, "upper hook: <not connected>\n");
 291
 292         sbuf_printf(&sbuf, "debugging:");
 293         for (f = 0; f < UNI_MAXFACILITY; f++)
 294                 if (uni_get_debug(priv->uni, f) != 0)
 295                         sbuf_printf(&sbuf, " %s=%u", uni_facname(f),
 296                             uni_get_debug(priv->uni, f));
 297         sbuf_printf(&sbuf, "\n");
 298
 299         if (priv->uni)
 300                 uni_status(priv->uni, &sbuf);
 301
 302         sbuf_finish(&sbuf);
 303         return (sbuf_len(&sbuf));
 304 }
 305
 306 static int
 307 ng_uni_rcvmsg(node_p node, item_p item, hook_p lasthook)
 308 {
 309         struct priv *priv = NG_NODE_PRIVATE(node);
 310         struct ng_mesg *resp = NULL;
 311         struct ng_mesg *msg;
 312         int error = 0;
 313         u_int i;
 314
 315         NGI_GET_MSG(item, msg);
 316
 317         switch (msg->header.typecookie) {
 318           case NGM_GENERIC_COOKIE:
 319                 switch (msg->header.cmd) {
 320                   case NGM_TEXT_STATUS:
 321                         NG_MKRESPONSE(resp, msg, NG_TEXTRESPONSE, M_NOWAIT);
 322                         if (resp == NULL) {
 323                                 error = ENOMEM;
 324                                 break;
 325                         }
 326
 327                         resp->header.arglen = text_status(node, priv,
 328                             (char *)resp->data, resp->header.arglen) + 1;
 329                         break;
 330
 331                   default:
 332                         error = EINVAL;
 333                         break;
 334                 }
 335                 break;
 336
 337           case NGM_UNI_COOKIE:
 338                 switch (msg->header.cmd) {
 339                   case NGM_UNI_SETDEBUG:
 340                     {
 341                         struct ngm_uni_debug *arg;
 342
 343                         if (msg->header.arglen > sizeof(*arg)) {
 344                                 error = EINVAL;
 345                                 break;
 346                         }
 347                         arg = (struct ngm_uni_debug *)msg->data;
 348                         for (i = 0; i < UNI_MAXFACILITY; i++)
 349                                 uni_set_debug(priv->uni, i, arg->level[i]);
 350                         break;
 351                     }
 352
 353                   case NGM_UNI_GETDEBUG:
 354                     {
 355                         struct ngm_uni_debug *arg;
 356
 357                         NG_MKRESPONSE(resp, msg, sizeof(*arg), M_NOWAIT);
 358                         if(resp == NULL) {
 359                                 error = ENOMEM;
 360                                 break;
 361                         }
 362                         arg = (struct ngm_uni_debug *)resp->data;
 363                         for (i = 0; i < UNI_MAXFACILITY; i++)
 364                                 arg->level[i] = uni_get_debug(priv->uni, i);
 365                         break;
 366                     }
 367
 368                   case NGM_UNI_GET_CONFIG:
 369                     {
 370                         struct uni_config *config;
 371
 372                         if (msg->header.arglen != 0) {
 373                                 error = EINVAL;
 374                                 break;
 375                         }
 376                         NG_MKRESPONSE(resp, msg, sizeof(*config), M_NOWAIT);
 377                         if (resp == NULL) {
 378                                 error = ENOMEM;
 379                                 break;
 380                         }
 381                         config = (struct uni_config *)resp->data;
 382                         uni_get_config(priv->uni, config);
 383
 384                         break;
 385                     }
 386
 387                   case NGM_UNI_SET_CONFIG:
 388                     {
 389                         struct ngm_uni_set_config *arg;
 390                         struct ngm_uni_config_mask *mask;
 391
 392                         if (msg->header.arglen != sizeof(*arg)) {
 393                                 error = EINVAL;
 394                                 break;
 395                         }
 396                         arg = (struct ngm_uni_set_config *)msg->data;
 397
 398                         NG_MKRESPONSE(resp, msg, sizeof(*mask), M_NOWAIT);
 399                         if (resp == NULL) {
 400                                 error = ENOMEM;
 401                                 break;
 402                         }
 403                         mask = (struct ngm_uni_config_mask *)resp->data;
 404
 405                         *mask = arg->mask;
 406
 407                         uni_set_config(priv->uni, &arg->config,
 408                             &mask->mask, &mask->popt_mask, &mask->option_mask);
 409
 410                         break;
 411                     }
 412
 413                   case NGM_UNI_ENABLE:
 414                         if (msg->header.arglen != 0) {
 415                                 error = EINVAL;
 416                                 break;
 417                         }
 418                         if (priv->enabled) {
 419                                 error = EISCONN;
 420                                 break;
 421                         }
 422                         priv->enabled = 1;
 423                         break;
 424
 425                   case NGM_UNI_DISABLE:
 426                         if (msg->header.arglen != 0) {
 427                                 error = EINVAL;
 428                                 break;
 429                         }
 430                         if (!priv->enabled) {
 431                                 error = ENOTCONN;
 432                                 break;
 433                         }
 434                         priv->enabled = 0;
 435                         uni_reset(priv->uni);
 436                         break;
 437
 438                   case NGM_UNI_GETSTATE:
 439                         if (msg->header.arglen != 0) {
 440                                 error = EINVAL;
 441                                 break;
 442                         }
 443                         NG_MKRESPONSE(resp, msg, sizeof(u_int32_t), M_NOWAIT);
 444                         if(resp == NULL) {
 445                                 error = ENOMEM;
 446                                 break;
 447                         }
 448                         *(u_int32_t *)resp->data =
 449                             priv->enabled ? (uni_getcustate(priv->uni) + 1)
 450                                           : 0;
 451                         break;
 452
 453                   default:
 454                         error = EINVAL;
 455                         break;
 456                 }
 457                 break;
 458
 459           default:
 460                 error = EINVAL;
 461                 break;
 462         }
 463
 464         NG_RESPOND_MSG(error, node, item, resp);
 465         NG_FREE_MSG(msg);
 466         return (error);
 467 }
 468
 469 /************************************************************/
 470 /*
 471  * HOOK MANAGEMENT
 472  */
 473 static int
 474 ng_uni_newhook(node_p node, hook_p hook, const char *name)
 475 {
 476         struct priv *priv = NG_NODE_PRIVATE(node);
 477
 478         if (strcmp(name, "lower") == 0) {
 479                 priv->lower = hook;
 480         } else if(strcmp(name, "upper") == 0) {
 481                 priv->upper = hook;
 482                 NG_HOOK_SET_RCVDATA(hook, ng_uni_rcvupper);
 483         } else
 484                 return EINVAL;
 485
 486         return 0;
 487 }
 488
 489 static int
 490 ng_uni_disconnect(hook_p hook)
 491 {
 492         node_p node = NG_HOOK_NODE(hook);
 493         struct priv *priv = NG_NODE_PRIVATE(node);
 494
 495         if(hook == priv->lower)
 496                 priv->lower = NULL;
 497         else if(hook == priv->upper)
 498                 priv->upper = NULL;
 499         else
 500                 printf("%s: bogus hook %s\n", __func__, NG_HOOK_NAME(hook));
 501
 502         if (NG_NODE_NUMHOOKS(node) == 0) {
 503                 if (NG_NODE_IS_VALID(node))
 504                         ng_rmnode_self(node);
 505         }
 506
 507         return (0);
 508 }
 509
 510 /************************************************************/
 511 /*
 512  * DATA
 513  */
 514 /*
 515  * Receive signal from USER.
 516  *
 517  * Repackage the data into one large buffer.
 518  */
 519 static int
 520 ng_uni_rcvupper(hook_p hook, item_p item)
 521 {
 522         node_p node = NG_HOOK_NODE(hook);
 523         struct priv *priv = NG_NODE_PRIVATE(node);
 524         struct mbuf *m;
 525         struct uni_arg arg;
 526         struct uni_msg *msg;
 527         int error;
 528
 529         if (!priv->enabled) {
 530                 NG_FREE_ITEM(item);
 531                 return (ENOTCONN);
 532         }
 533
 534         NGI_GET_M(item, m);
 535         NG_FREE_ITEM(item);
 536
 537         if ((error = uni_msg_unpack_mbuf(m, &msg)) != 0) {
 538                 m_freem(m);
 539                 return (error);
 540         }
 541         m_freem(m);
 542
 543         if (uni_msg_len(msg) < sizeof(arg)) {
 544                 printf("%s: packet too short\n", __func__);
 545                 uni_msg_destroy(msg);
 546                 return (EINVAL);
 547         }
 548
 549         bcopy(msg->b_rptr, &arg, sizeof(arg));
 550         msg->b_rptr += sizeof(arg);
 551
 552         if (arg.sig >= UNIAPI_MAXSIG) {
 553                 printf("%s: bogus signal\n", __func__);
 554                 uni_msg_destroy(msg);
 555                 return (EINVAL);
 556         }
 557         uni_uni_input(priv->uni, arg.sig, arg.cookie, msg);
 558         uni_work(priv->uni);
 559
 560         return (0);
 561 }
 562
 563 /*
 564  * Upper layer signal from UNI
 565  */
 566 static void
 567 uni_uni_output(struct uni *uni, void *varg, enum uni_sig sig, u_int32_t cookie,
 568     struct uni_msg *msg)
 569 {
 570         node_p node = (node_p)varg;
 571         struct priv *priv = NG_NODE_PRIVATE(node);
 572         struct mbuf *m;
 573         struct uni_arg arg;
 574         int error;
 575
 576         if (priv->upper == NULL) {
 577                 if (msg != NULL)
 578                         uni_msg_destroy(msg);
 579                 return;
 580         }
 581         arg.sig = sig;
 582         arg.cookie = cookie;
 583
 584         m = uni_msg_pack_mbuf(msg, &arg, sizeof(arg));
 585         if (msg != NULL)
 586                 uni_msg_destroy(msg);
 587         if (m == NULL)
 588                 return;
 589
 590         NG_SEND_DATA_ONLY(error, priv->upper, m);
 591 }
 592
 593 static void
 594 dump_uni_msg(struct uni_msg *msg)
 595 {
 596         u_int pos;
 597
 598         for (pos = 0; pos < uni_msg_len(msg); pos++) {
 599                 if (pos % 16 == 0)
 600                         printf("%06o ", pos);
 601                 if (pos % 16 == 8)
 602                         printf("  ");
 603                 printf(" %02x", msg->b_rptr[pos]);
 604                 if (pos % 16 == 15)
 605                         printf("\n");
 606         }
 607         if (pos % 16 != 0)
 608                 printf("\n");
 609 }
 610
 611 /*
 612  * Dump a SAAL signal in either direction
 613  */
 614 static void
 615 dump_saal_signal(node_p node, enum saal_sig sig, struct uni_msg *msg, int to)
 616 {
 617         struct priv *priv = NG_NODE_PRIVATE(node);
 618
 619         printf("signal %s SAAL: ", to ? "to" : "from");
 620
 621         switch (sig) {
 622 #define D(S) case S: printf("%s", #S); break
 623
 624         D(SAAL_ESTABLISH_request);
 625         D(SAAL_ESTABLISH_indication);
 626         D(SAAL_ESTABLISH_confirm);
 627         D(SAAL_RELEASE_request);
 628         D(SAAL_RELEASE_confirm);
 629         D(SAAL_RELEASE_indication);
 630         D(SAAL_DATA_request);
 631         D(SAAL_DATA_indication);
 632         D(SAAL_UDATA_request);
 633         D(SAAL_UDATA_indication);
 634
 635 #undef D
 636           default:
 637                 printf("sig=%d", sig); break;
 638         }
 639         if (msg != NULL) {
 640                 printf(" data=%zu\n", uni_msg_len(msg));
 641                 if (uni_get_debug(priv->uni, UNI_FAC_SAAL) > 1)
 642                         dump_uni_msg(msg);
 643         } else
 644                 printf("\n");
 645 }
 646
 647 /*
 648  * Receive signal from SSCOP.
 649  *
 650  * If this is a data signal, repackage the data into one large buffer.
 651  * UNI shouldn't be the bottleneck in a system and this greatly simplifies
 652  * parsing in UNI.
 653  */
 654 static int
 655 ng_uni_rcvlower(hook_p hook __unused, item_p item)
 656 {
 657         node_p node = NG_HOOK_NODE(hook);
 658         struct priv *priv = NG_NODE_PRIVATE(node);
 659         struct mbuf *m;
 660         struct sscfu_arg arg;
 661         struct uni_msg *msg;
 662         int error;
 663
 664         if (!priv->enabled) {
 665                 NG_FREE_ITEM(item);
 666                 return (ENOTCONN);
 667         }
 668
 669         NGI_GET_M(item, m);
 670         NG_FREE_ITEM(item);
 671
 672         if ((error = uni_msg_unpack_mbuf(m, &msg)) != 0) {
 673                 m_freem(m);
 674                 return (error);
 675         }
 676         m_freem(m);
 677
 678         if (uni_msg_len(msg) < sizeof(arg)) {
 679                 uni_msg_destroy(msg);
 680                 printf("%s: packet too short\n", __func__);
 681                 return (EINVAL);
 682         }
 683         bcopy(msg->b_rptr, &arg, sizeof(arg));
 684         msg->b_rptr += sizeof(arg);
 685
 686         if (arg.sig > SAAL_UDATA_indication) {
 687                 uni_msg_destroy(msg);
 688                 printf("%s: bogus signal\n", __func__);
 689                 return (EINVAL);
 690         }
 691
 692         if (uni_get_debug(priv->uni, UNI_FAC_SAAL) > 0)
 693                 dump_saal_signal(node, arg.sig, msg, 0);
 694
 695         uni_saal_input(priv->uni, arg.sig, msg);
 696         uni_work(priv->uni);
 697
 698         return (0);
 699 }
 700
 701 /*
 702  * Send signal to sscop.
 703  * Pack the message into an mbuf chain.
 704  */
 705 static void
 706 uni_saal_output(struct uni *uni, void *varg, enum saal_sig sig, struct uni_msg *msg)
 707 {
 708         node_p node = (node_p)varg;
 709         struct priv *priv = NG_NODE_PRIVATE(node);
 710         struct mbuf *m;
 711         struct sscfu_arg arg;
 712         int error;
 713
 714         if (uni_get_debug(priv->uni, UNI_FAC_SAAL) > 0)
 715                 dump_saal_signal(node, sig, msg, 1);
 716
 717         if (priv->lower == NULL) {
 718                 if (msg != NULL)
 719                         uni_msg_destroy(msg);
 720                 return;
 721         }
 722
 723         arg.sig = sig;
 724
 725         m = uni_msg_pack_mbuf(msg, &arg, sizeof(arg));
 726         if (msg != NULL)
 727                 uni_msg_destroy(msg);
 728         if (m == NULL)
 729                 return;
 730
 731         NG_SEND_DATA_ONLY(error, priv->lower, m);
 732 }
 733
 734 static void
 735 uni_verbose(struct uni *uni, void *varg, u_int fac, const char *fmt, ...)
 736 {
 737         va_list ap;
 738
 739         static char *facnames[] = {
 740 #define UNI_DEBUG_DEFINE(D) [UNI_FAC_##D] = #D,
 741                 UNI_DEBUG_FACILITIES
 742 #undef UNI_DEBUG_DEFINE
 743         };
 744
 745         printf("%s: ", facnames[fac]);
 746
 747         va_start(ap, fmt);
 748         vprintf(fmt, ap);
 749         va_end(ap);
 750
 751         printf("\n");
 752 }
 753
 754 /************************************************************/
 755 /*
 756  * Memory debugging
 757  */
 758 struct unimem_debug {
 759         const char      *file;
 760         u_int           lno;
 761         LIST_ENTRY(unimem_debug) link;
 762         char            data[0];
 763 };
 764 LIST_HEAD(unimem_debug_list, unimem_debug);
 765
 766 static struct unimem_debug_list nguni_freemem[UNIMEM_TYPES] = {
 767     LIST_HEAD_INITIALIZER(nguni_freemem[0]),
 768     LIST_HEAD_INITIALIZER(nguni_freemem[1]),
 769     LIST_HEAD_INITIALIZER(nguni_freemem[2]),
 770     LIST_HEAD_INITIALIZER(nguni_freemem[3]),
 771     LIST_HEAD_INITIALIZER(nguni_freemem[4]),
 772 };
 773 static struct unimem_debug_list nguni_usedmem[UNIMEM_TYPES] = {
 774     LIST_HEAD_INITIALIZER(nguni_usedmem[0]),
 775     LIST_HEAD_INITIALIZER(nguni_usedmem[1]),
 776     LIST_HEAD_INITIALIZER(nguni_usedmem[2]),
 777     LIST_HEAD_INITIALIZER(nguni_usedmem[3]),
 778     LIST_HEAD_INITIALIZER(nguni_usedmem[4]),
 779 };
 780
 781 static struct mtx nguni_unilist_mtx;
 782
 783 static const char *unimem_names[UNIMEM_TYPES] = {
 784         "instance",
 785         "all",
 786         "signal",
 787         "call",
 788         "party"
 789 };
 790
 791 static void
 792 uni_init(void)
 793 {
 794         mtx_init(&nguni_unilist_mtx, "netgraph UNI structure lists", NULL,
 795             MTX_DEF);
 796 }
 797
 798 static void
 799 uni_fini(void)
 800 {
 801         u_int type;
 802         struct unimem_debug *h;
 803
 804         for (type = 0; type < UNIMEM_TYPES; type++) {
 805                 while ((h = LIST_FIRST(&nguni_freemem[type])) != NULL) {
 806                         LIST_REMOVE(h, link);
 807                         free(h, M_UNI);
 808                 }
 809
 810                 while ((h = LIST_FIRST(&nguni_usedmem[type])) != NULL) {
 811                         LIST_REMOVE(h, link);
 812                         printf("ng_uni: %s in use: %p (%s,%u)\n",
 813                             unimem_names[type], (caddr_t)h->data,
 814                             h->file, h->lno);
 815                         free(h, M_UNI);
 816                 }
 817         }
 818
 819         mtx_destroy(&nguni_unilist_mtx);
 820 }
 821
 822 /*
 823  * Allocate a chunk of memory from a given type.
 824  */
 825 void *
 826 ng_uni_malloc(enum unimem type, const char *file, u_int lno)
 827 {
 828         struct unimem_debug *d;
 829         size_t full;
 830
 831         /*
 832          * Try to allocate
 833          */
 834         mtx_lock(&nguni_unilist_mtx);
 835         if ((d = LIST_FIRST(&nguni_freemem[type])) != NULL)
 836                 LIST_REMOVE(d, link);
 837         mtx_unlock(&nguni_unilist_mtx);
 838
 839         if (d == NULL) {
 840                 /*
 841                  * allocate
 842                  */
 843                 full = unimem_sizes[type] + offsetof(struct unimem_debug, data);
 844                 if ((d = malloc(full, M_UNI, M_NOWAIT | M_ZERO)) == NULL)
 845                         return (NULL);
 846         } else {
 847                 bzero(d->data, unimem_sizes[type]);
 848         }
 849         d->file = file;
 850         d->lno = lno;
 851
 852         mtx_lock(&nguni_unilist_mtx);
 853         LIST_INSERT_HEAD(&nguni_usedmem[type], d, link);
 854         mtx_unlock(&nguni_unilist_mtx);
 855         return (d->data);
 856 }
 857
 858 void
 859 ng_uni_free(enum unimem type, void *ptr, const char *file, u_int lno)
 860 {
 861         struct unimem_debug *d, *h;
 862
 863         d = (struct unimem_debug *)
 864             ((char *)ptr - offsetof(struct unimem_debug, data));
 865
 866         mtx_lock(&nguni_unilist_mtx);
 867
 868         LIST_FOREACH(h, &nguni_usedmem[type], link)
 869                 if (d == h)
 870                         break;
 871
 872         if (h != NULL) {
 873                 LIST_REMOVE(d, link);
 874                 LIST_INSERT_HEAD(&nguni_freemem[type], d, link);
 875         } else {
 876                 /*
 877                  * Not on used list - try free list.
 878                  */
 879                 LIST_FOREACH(h, &nguni_freemem[type], link)
 880                         if (d == h)
 881                                 break;
 882                 if (h == NULL)
 883                         printf("ng_uni: %s,%u: %p(%s) was never allocated\n",
 884                             file, lno, ptr, unimem_names[type]);
 885                 else
 886                         printf("ng_uni: %s,%u: %p(%s) was already destroyed "
 887                             "in %s,%u\n",
 888                             file, lno, ptr, unimem_names[type],
 889                             h->file, h->lno);
 890         }
 891         mtx_unlock(&nguni_unilist_mtx);
 892 }
 893 /************************************************************/
 894 /*
 895  * INITIALISATION
 896  */
 897
 898 /*
 899  * Loading and unloading of node type
 900  */
 901 static int
 902 ng_uni_mod_event(module_t mod, int event, void *data)
 903 {
 904         int error = 0;
 905
 906         switch(event) {
 907           case MOD_LOAD:
 908                 uni_init();
 909                 break;
 910
 911           case MOD_UNLOAD:
 912                 uni_fini();
 913                 break;
 914
 915           default:
 916                 error = EOPNOTSUPP;
 917                 break;
 918         }
 919         return (error);
 920 }