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         gone_in(14, "ng_uni: netgraph ATM modules");
 229
 230         priv = malloc(sizeof(*priv), M_NG_UNI, M_WAITOK | M_ZERO);
 231
 232         if ((priv->uni = uni_create(node, &uni_funcs)) == NULL) {
 233                 free(priv, M_NG_UNI);
 234                 return (ENOMEM);
 235         }
 236
 237         NG_NODE_SET_PRIVATE(node, priv);
 238         NG_NODE_FORCE_WRITER(node);
 239
 240         return (0);
 241 }
 242
 243 static int
 244 ng_uni_shutdown(node_p node)
 245 {
 246         struct priv *priv = NG_NODE_PRIVATE(node);
 247
 248         uni_destroy(priv->uni);
 249
 250         free(priv, M_NG_UNI);
 251         NG_NODE_SET_PRIVATE(node, NULL);
 252
 253         NG_NODE_UNREF(node);
 254
 255         return (0);
 256 }
 257
 258 /************************************************************/
 259 /*
 260  * CONTROL MESSAGES
 261  */
 262 static void
 263 uni_do_status(struct uni *uni, void *uarg, void *sbuf, const char *fmt, ...)
 264 {
 265         va_list ap;
 266
 267         va_start(ap, fmt);
 268         sbuf_printf(sbuf, fmt, ap);
 269         va_end(ap);
 270 }
 271
 272 static int
 273 text_status(node_p node, struct priv *priv, char *buf, u_int len)
 274 {
 275         struct sbuf sbuf;
 276         u_int f;
 277
 278         sbuf_new(&sbuf, buf, len, 0);
 279
 280         if (priv->lower != NULL)
 281                 sbuf_printf(&sbuf, "lower hook: connected to %s:%s\n",
 282                     NG_NODE_NAME(NG_HOOK_NODE(NG_HOOK_PEER(priv->lower))),
 283                     NG_HOOK_NAME(NG_HOOK_PEER(priv->lower)));
 284         else
 285                 sbuf_printf(&sbuf, "lower hook: <not connected>\n");
 286
 287         if (priv->upper != NULL)
 288                 sbuf_printf(&sbuf, "upper hook: connected to %s:%s\n",
 289                     NG_NODE_NAME(NG_HOOK_NODE(NG_HOOK_PEER(priv->upper))),
 290                     NG_HOOK_NAME(NG_HOOK_PEER(priv->upper)));
 291         else
 292                 sbuf_printf(&sbuf, "upper hook: <not connected>\n");
 293
 294         sbuf_printf(&sbuf, "debugging:");
 295         for (f = 0; f < UNI_MAXFACILITY; f++)
 296                 if (uni_get_debug(priv->uni, f) != 0)
 297                         sbuf_printf(&sbuf, " %s=%u", uni_facname(f),
 298                             uni_get_debug(priv->uni, f));
 299         sbuf_printf(&sbuf, "\n");
 300
 301         if (priv->uni)
 302                 uni_status(priv->uni, &sbuf);
 303
 304         sbuf_finish(&sbuf);
 305         return (sbuf_len(&sbuf));
 306 }
 307
 308 static int
 309 ng_uni_rcvmsg(node_p node, item_p item, hook_p lasthook)
 310 {
 311         struct priv *priv = NG_NODE_PRIVATE(node);
 312         struct ng_mesg *resp = NULL;
 313         struct ng_mesg *msg;
 314         int error = 0;
 315         u_int i;
 316
 317         NGI_GET_MSG(item, msg);
 318
 319         switch (msg->header.typecookie) {
 320           case NGM_GENERIC_COOKIE:
 321                 switch (msg->header.cmd) {
 322                   case NGM_TEXT_STATUS:
 323                         NG_MKRESPONSE(resp, msg, NG_TEXTRESPONSE, M_NOWAIT);
 324                         if (resp == NULL) {
 325                                 error = ENOMEM;
 326                                 break;
 327                         }
 328
 329                         resp->header.arglen = text_status(node, priv,
 330                             (char *)resp->data, resp->header.arglen) + 1;
 331                         break;
 332
 333                   default:
 334                         error = EINVAL;
 335                         break;
 336                 }
 337                 break;
 338
 339           case NGM_UNI_COOKIE:
 340                 switch (msg->header.cmd) {
 341                   case NGM_UNI_SETDEBUG:
 342                     {
 343                         struct ngm_uni_debug *arg;
 344
 345                         if (msg->header.arglen > sizeof(*arg)) {
 346                                 error = EINVAL;
 347                                 break;
 348                         }
 349                         arg = (struct ngm_uni_debug *)msg->data;
 350                         for (i = 0; i < UNI_MAXFACILITY; i++)
 351                                 uni_set_debug(priv->uni, i, arg->level[i]);
 352                         break;
 353                     }
 354
 355                   case NGM_UNI_GETDEBUG:
 356                     {
 357                         struct ngm_uni_debug *arg;
 358
 359                         NG_MKRESPONSE(resp, msg, sizeof(*arg), M_NOWAIT);
 360                         if(resp == NULL) {
 361                                 error = ENOMEM;
 362                                 break;
 363                         }
 364                         arg = (struct ngm_uni_debug *)resp->data;
 365                         for (i = 0; i < UNI_MAXFACILITY; i++)
 366                                 arg->level[i] = uni_get_debug(priv->uni, i);
 367                         break;
 368                     }
 369
 370                   case NGM_UNI_GET_CONFIG:
 371                     {
 372                         struct uni_config *config;
 373
 374                         if (msg->header.arglen != 0) {
 375                                 error = EINVAL;
 376                                 break;
 377                         }
 378                         NG_MKRESPONSE(resp, msg, sizeof(*config), M_NOWAIT);
 379                         if (resp == NULL) {
 380                                 error = ENOMEM;
 381                                 break;
 382                         }
 383                         config = (struct uni_config *)resp->data;
 384                         uni_get_config(priv->uni, config);
 385
 386                         break;
 387                     }
 388
 389                   case NGM_UNI_SET_CONFIG:
 390                     {
 391                         struct ngm_uni_set_config *arg;
 392                         struct ngm_uni_config_mask *mask;
 393
 394                         if (msg->header.arglen != sizeof(*arg)) {
 395                                 error = EINVAL;
 396                                 break;
 397                         }
 398                         arg = (struct ngm_uni_set_config *)msg->data;
 399
 400                         NG_MKRESPONSE(resp, msg, sizeof(*mask), M_NOWAIT);
 401                         if (resp == NULL) {
 402                                 error = ENOMEM;
 403                                 break;
 404                         }
 405                         mask = (struct ngm_uni_config_mask *)resp->data;
 406
 407                         *mask = arg->mask;
 408
 409                         uni_set_config(priv->uni, &arg->config,
 410                             &mask->mask, &mask->popt_mask, &mask->option_mask);
 411
 412                         break;
 413                     }
 414
 415                   case NGM_UNI_ENABLE:
 416                         if (msg->header.arglen != 0) {
 417                                 error = EINVAL;
 418                                 break;
 419                         }
 420                         if (priv->enabled) {
 421                                 error = EISCONN;
 422                                 break;
 423                         }
 424                         priv->enabled = 1;
 425                         break;
 426
 427                   case NGM_UNI_DISABLE:
 428                         if (msg->header.arglen != 0) {
 429                                 error = EINVAL;
 430                                 break;
 431                         }
 432                         if (!priv->enabled) {
 433                                 error = ENOTCONN;
 434                                 break;
 435                         }
 436                         priv->enabled = 0;
 437                         uni_reset(priv->uni);
 438                         break;
 439
 440                   case NGM_UNI_GETSTATE:
 441                         if (msg->header.arglen != 0) {
 442                                 error = EINVAL;
 443                                 break;
 444                         }
 445                         NG_MKRESPONSE(resp, msg, sizeof(u_int32_t), M_NOWAIT);
 446                         if(resp == NULL) {
 447                                 error = ENOMEM;
 448                                 break;
 449                         }
 450                         *(u_int32_t *)resp->data =
 451                             priv->enabled ? (uni_getcustate(priv->uni) + 1)
 452                                           : 0;
 453                         break;
 454
 455                   default:
 456                         error = EINVAL;
 457                         break;
 458                 }
 459                 break;
 460
 461           default:
 462                 error = EINVAL;
 463                 break;
 464         }
 465
 466         NG_RESPOND_MSG(error, node, item, resp);
 467         NG_FREE_MSG(msg);
 468         return (error);
 469 }
 470
 471 /************************************************************/
 472 /*
 473  * HOOK MANAGEMENT
 474  */
 475 static int
 476 ng_uni_newhook(node_p node, hook_p hook, const char *name)
 477 {
 478         struct priv *priv = NG_NODE_PRIVATE(node);
 479
 480         if (strcmp(name, "lower") == 0) {
 481                 priv->lower = hook;
 482         } else if(strcmp(name, "upper") == 0) {
 483                 priv->upper = hook;
 484                 NG_HOOK_SET_RCVDATA(hook, ng_uni_rcvupper);
 485         } else
 486                 return EINVAL;
 487
 488         return 0;
 489 }
 490
 491 static int
 492 ng_uni_disconnect(hook_p hook)
 493 {
 494         node_p node = NG_HOOK_NODE(hook);
 495         struct priv *priv = NG_NODE_PRIVATE(node);
 496
 497         if(hook == priv->lower)
 498                 priv->lower = NULL;
 499         else if(hook == priv->upper)
 500                 priv->upper = NULL;
 501         else
 502                 printf("%s: bogus hook %s\n", __func__, NG_HOOK_NAME(hook));
 503
 504         if (NG_NODE_NUMHOOKS(node) == 0) {
 505                 if (NG_NODE_IS_VALID(node))
 506                         ng_rmnode_self(node);
 507         }
 508
 509         return (0);
 510 }
 511
 512 /************************************************************/
 513 /*
 514  * DATA
 515  */
 516 /*
 517  * Receive signal from USER.
 518  *
 519  * Repackage the data into one large buffer.
 520  */
 521 static int
 522 ng_uni_rcvupper(hook_p hook, item_p item)
 523 {
 524         node_p node = NG_HOOK_NODE(hook);
 525         struct priv *priv = NG_NODE_PRIVATE(node);
 526         struct mbuf *m;
 527         struct uni_arg arg;
 528         struct uni_msg *msg;
 529         int error;
 530
 531         if (!priv->enabled) {
 532                 NG_FREE_ITEM(item);
 533                 return (ENOTCONN);
 534         }
 535
 536         NGI_GET_M(item, m);
 537         NG_FREE_ITEM(item);
 538
 539         if ((error = uni_msg_unpack_mbuf(m, &msg)) != 0) {
 540                 m_freem(m);
 541                 return (error);
 542         }
 543         m_freem(m);
 544
 545         if (uni_msg_len(msg) < sizeof(arg)) {
 546                 printf("%s: packet too short\n", __func__);
 547                 uni_msg_destroy(msg);
 548                 return (EINVAL);
 549         }
 550
 551         bcopy(msg->b_rptr, &arg, sizeof(arg));
 552         msg->b_rptr += sizeof(arg);
 553
 554         if (arg.sig >= UNIAPI_MAXSIG) {
 555                 printf("%s: bogus signal\n", __func__);
 556                 uni_msg_destroy(msg);
 557                 return (EINVAL);
 558         }
 559         uni_uni_input(priv->uni, arg.sig, arg.cookie, msg);
 560         uni_work(priv->uni);
 561
 562         return (0);
 563 }
 564
 565 /*
 566  * Upper layer signal from UNI
 567  */
 568 static void
 569 uni_uni_output(struct uni *uni, void *varg, enum uni_sig sig, u_int32_t cookie,
 570     struct uni_msg *msg)
 571 {
 572         node_p node = (node_p)varg;
 573         struct priv *priv = NG_NODE_PRIVATE(node);
 574         struct mbuf *m;
 575         struct uni_arg arg;
 576         int error;
 577
 578         if (priv->upper == NULL) {
 579                 if (msg != NULL)
 580                         uni_msg_destroy(msg);
 581                 return;
 582         }
 583         arg.sig = sig;
 584         arg.cookie = cookie;
 585
 586         m = uni_msg_pack_mbuf(msg, &arg, sizeof(arg));
 587         if (msg != NULL)
 588                 uni_msg_destroy(msg);
 589         if (m == NULL)
 590                 return;
 591
 592         NG_SEND_DATA_ONLY(error, priv->upper, m);
 593 }
 594
 595 static void
 596 dump_uni_msg(struct uni_msg *msg)
 597 {
 598         u_int pos;
 599
 600         for (pos = 0; pos < uni_msg_len(msg); pos++) {
 601                 if (pos % 16 == 0)
 602                         printf("%06o ", pos);
 603                 if (pos % 16 == 8)
 604                         printf("  ");
 605                 printf(" %02x", msg->b_rptr[pos]);
 606                 if (pos % 16 == 15)
 607                         printf("\n");
 608         }
 609         if (pos % 16 != 0)
 610                 printf("\n");
 611 }
 612
 613 /*
 614  * Dump a SAAL signal in either direction
 615  */
 616 static void
 617 dump_saal_signal(node_p node, enum saal_sig sig, struct uni_msg *msg, int to)
 618 {
 619         struct priv *priv = NG_NODE_PRIVATE(node);
 620
 621         printf("signal %s SAAL: ", to ? "to" : "from");
 622
 623         switch (sig) {
 624 #define D(S) case S: printf("%s", #S); break
 625
 626         D(SAAL_ESTABLISH_request);
 627         D(SAAL_ESTABLISH_indication);
 628         D(SAAL_ESTABLISH_confirm);
 629         D(SAAL_RELEASE_request);
 630         D(SAAL_RELEASE_confirm);
 631         D(SAAL_RELEASE_indication);
 632         D(SAAL_DATA_request);
 633         D(SAAL_DATA_indication);
 634         D(SAAL_UDATA_request);
 635         D(SAAL_UDATA_indication);
 636
 637 #undef D
 638           default:
 639                 printf("sig=%d", sig); break;
 640         }
 641         if (msg != NULL) {
 642                 printf(" data=%zu\n", uni_msg_len(msg));
 643                 if (uni_get_debug(priv->uni, UNI_FAC_SAAL) > 1)
 644                         dump_uni_msg(msg);
 645         } else
 646                 printf("\n");
 647 }
 648
 649 /*
 650  * Receive signal from SSCOP.
 651  *
 652  * If this is a data signal, repackage the data into one large buffer.
 653  * UNI shouldn't be the bottleneck in a system and this greatly simplifies
 654  * parsing in UNI.
 655  */
 656 static int
 657 ng_uni_rcvlower(hook_p hook __unused, item_p item)
 658 {
 659         node_p node = NG_HOOK_NODE(hook);
 660         struct priv *priv = NG_NODE_PRIVATE(node);
 661         struct mbuf *m;
 662         struct sscfu_arg arg;
 663         struct uni_msg *msg;
 664         int error;
 665
 666         if (!priv->enabled) {
 667                 NG_FREE_ITEM(item);
 668                 return (ENOTCONN);
 669         }
 670
 671         NGI_GET_M(item, m);
 672         NG_FREE_ITEM(item);
 673
 674         if ((error = uni_msg_unpack_mbuf(m, &msg)) != 0) {
 675                 m_freem(m);
 676                 return (error);
 677         }
 678         m_freem(m);
 679
 680         if (uni_msg_len(msg) < sizeof(arg)) {
 681                 uni_msg_destroy(msg);
 682                 printf("%s: packet too short\n", __func__);
 683                 return (EINVAL);
 684         }
 685         bcopy(msg->b_rptr, &arg, sizeof(arg));
 686         msg->b_rptr += sizeof(arg);
 687
 688         if (arg.sig > SAAL_UDATA_indication) {
 689                 uni_msg_destroy(msg);
 690                 printf("%s: bogus signal\n", __func__);
 691                 return (EINVAL);
 692         }
 693
 694         if (uni_get_debug(priv->uni, UNI_FAC_SAAL) > 0)
 695                 dump_saal_signal(node, arg.sig, msg, 0);
 696
 697         uni_saal_input(priv->uni, arg.sig, msg);
 698         uni_work(priv->uni);
 699
 700         return (0);
 701 }
 702
 703 /*
 704  * Send signal to sscop.
 705  * Pack the message into an mbuf chain.
 706  */
 707 static void
 708 uni_saal_output(struct uni *uni, void *varg, enum saal_sig sig, struct uni_msg *msg)
 709 {
 710         node_p node = (node_p)varg;
 711         struct priv *priv = NG_NODE_PRIVATE(node);
 712         struct mbuf *m;
 713         struct sscfu_arg arg;
 714         int error;
 715
 716         if (uni_get_debug(priv->uni, UNI_FAC_SAAL) > 0)
 717                 dump_saal_signal(node, sig, msg, 1);
 718
 719         if (priv->lower == NULL) {
 720                 if (msg != NULL)
 721                         uni_msg_destroy(msg);
 722                 return;
 723         }
 724
 725         arg.sig = sig;
 726
 727         m = uni_msg_pack_mbuf(msg, &arg, sizeof(arg));
 728         if (msg != NULL)
 729                 uni_msg_destroy(msg);
 730         if (m == NULL)
 731                 return;
 732
 733         NG_SEND_DATA_ONLY(error, priv->lower, m);
 734 }
 735
 736 static void
 737 uni_verbose(struct uni *uni, void *varg, u_int fac, const char *fmt, ...)
 738 {
 739         va_list ap;
 740
 741         static char *facnames[] = {
 742 #define UNI_DEBUG_DEFINE(D) [UNI_FAC_##D] = #D,
 743                 UNI_DEBUG_FACILITIES
 744 #undef UNI_DEBUG_DEFINE
 745         };
 746
 747         printf("%s: ", facnames[fac]);
 748
 749         va_start(ap, fmt);
 750         vprintf(fmt, ap);
 751         va_end(ap);
 752
 753         printf("\n");
 754 }
 755
 756 /************************************************************/
 757 /*
 758  * Memory debugging
 759  */
 760 struct unimem_debug {
 761         const char      *file;
 762         u_int           lno;
 763         LIST_ENTRY(unimem_debug) link;
 764         char            data[0];
 765 };
 766 LIST_HEAD(unimem_debug_list, unimem_debug);
 767
 768 static struct unimem_debug_list nguni_freemem[UNIMEM_TYPES] = {
 769     LIST_HEAD_INITIALIZER(nguni_freemem[0]),
 770     LIST_HEAD_INITIALIZER(nguni_freemem[1]),
 771     LIST_HEAD_INITIALIZER(nguni_freemem[2]),
 772     LIST_HEAD_INITIALIZER(nguni_freemem[3]),
 773     LIST_HEAD_INITIALIZER(nguni_freemem[4]),
 774 };
 775 static struct unimem_debug_list nguni_usedmem[UNIMEM_TYPES] = {
 776     LIST_HEAD_INITIALIZER(nguni_usedmem[0]),
 777     LIST_HEAD_INITIALIZER(nguni_usedmem[1]),
 778     LIST_HEAD_INITIALIZER(nguni_usedmem[2]),
 779     LIST_HEAD_INITIALIZER(nguni_usedmem[3]),
 780     LIST_HEAD_INITIALIZER(nguni_usedmem[4]),
 781 };
 782
 783 static struct mtx nguni_unilist_mtx;
 784
 785 static const char *unimem_names[UNIMEM_TYPES] = {
 786         "instance",
 787         "all",
 788         "signal",
 789         "call",
 790         "party"
 791 };
 792
 793 static void
 794 uni_init(void)
 795 {
 796         mtx_init(&nguni_unilist_mtx, "netgraph UNI structure lists", NULL,
 797             MTX_DEF);
 798 }
 799
 800 static void
 801 uni_fini(void)
 802 {
 803         u_int type;
 804         struct unimem_debug *h;
 805
 806         for (type = 0; type < UNIMEM_TYPES; type++) {
 807                 while ((h = LIST_FIRST(&nguni_freemem[type])) != NULL) {
 808                         LIST_REMOVE(h, link);
 809                         free(h, M_UNI);
 810                 }
 811
 812                 while ((h = LIST_FIRST(&nguni_usedmem[type])) != NULL) {
 813                         LIST_REMOVE(h, link);
 814                         printf("ng_uni: %s in use: %p (%s,%u)\n",
 815                             unimem_names[type], (caddr_t)h->data,
 816                             h->file, h->lno);
 817                         free(h, M_UNI);
 818                 }
 819         }
 820
 821         mtx_destroy(&nguni_unilist_mtx);
 822 }
 823
 824 /*
 825  * Allocate a chunk of memory from a given type.
 826  */
 827 void *
 828 ng_uni_malloc(enum unimem type, const char *file, u_int lno)
 829 {
 830         struct unimem_debug *d;
 831         size_t full;
 832
 833         /*
 834          * Try to allocate
 835          */
 836         mtx_lock(&nguni_unilist_mtx);
 837         if ((d = LIST_FIRST(&nguni_freemem[type])) != NULL)
 838                 LIST_REMOVE(d, link);
 839         mtx_unlock(&nguni_unilist_mtx);
 840
 841         if (d == NULL) {
 842                 /*
 843                  * allocate
 844                  */
 845                 full = unimem_sizes[type] + offsetof(struct unimem_debug, data);
 846                 if ((d = malloc(full, M_UNI, M_NOWAIT | M_ZERO)) == NULL)
 847                         return (NULL);
 848         } else {
 849                 bzero(d->data, unimem_sizes[type]);
 850         }
 851         d->file = file;
 852         d->lno = lno;
 853
 854         mtx_lock(&nguni_unilist_mtx);
 855         LIST_INSERT_HEAD(&nguni_usedmem[type], d, link);
 856         mtx_unlock(&nguni_unilist_mtx);
 857         return (d->data);
 858 }
 859
 860 void
 861 ng_uni_free(enum unimem type, void *ptr, const char *file, u_int lno)
 862 {
 863         struct unimem_debug *d, *h;
 864
 865         d = (struct unimem_debug *)
 866             ((char *)ptr - offsetof(struct unimem_debug, data));
 867
 868         mtx_lock(&nguni_unilist_mtx);
 869
 870         LIST_FOREACH(h, &nguni_usedmem[type], link)
 871                 if (d == h)
 872                         break;
 873
 874         if (h != NULL) {
 875                 LIST_REMOVE(d, link);
 876                 LIST_INSERT_HEAD(&nguni_freemem[type], d, link);
 877         } else {
 878                 /*
 879                  * Not on used list - try free list.
 880                  */
 881                 LIST_FOREACH(h, &nguni_freemem[type], link)
 882                         if (d == h)
 883                                 break;
 884                 if (h == NULL)
 885                         printf("ng_uni: %s,%u: %p(%s) was never allocated\n",
 886                             file, lno, ptr, unimem_names[type]);
 887                 else
 888                         printf("ng_uni: %s,%u: %p(%s) was already destroyed "
 889                             "in %s,%u\n",
 890                             file, lno, ptr, unimem_names[type],
 891                             h->file, h->lno);
 892         }
 893         mtx_unlock(&nguni_unilist_mtx);
 894 }
 895 /************************************************************/
 896 /*
 897  * INITIALISATION
 898  */
 899
 900 /*
 901  * Loading and unloading of node type
 902  */
 903 static int
 904 ng_uni_mod_event(module_t mod, int event, void *data)
 905 {
 906         int error = 0;
 907
 908         switch(event) {
 909           case MOD_LOAD:
 910                 uni_init();
 911                 break;
 912
 913           case MOD_UNLOAD:
 914                 uni_fini();
 915                 break;
 916
 917           default:
 918                 error = EOPNOTSUPP;
 919                 break;
 920         }
 921         return (error);
 922 }