extcap.c

   1 /* extcap.h
   2  *
   3  * Routines for extcap external capture
   4  * Copyright 2013, Mike Ryan <mikeryan@lacklustre.net>
   5  *
   6  * Wireshark - Network traffic analyzer
   7  * By Gerald Combs <gerald@wireshark.org>
   8  * Copyright 1998 Gerald Combs
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * as published by the Free Software Foundation; either version 2
  13  * of the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  23  */
  24
  25 #include <config.h>
  26
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30
  31 #ifdef WIN32
  32 #include <windows.h>
  33 #include <process.h>
  34 #include <time.h>
  35 #else
  36 /* Include for unlink */
  37 #include <unistd.h>
  38 #endif
  39
  40 #include <glib.h>
  41 #include <log.h>
  42
  43 #include <wsutil/file_util.h>
  44 #include <wsutil/filesystem.h>
  45 #include <wsutil/tempfile.h>
  46
  47 #include "capture_opts.h"
  48
  49 #ifdef HAVE_EXTCAP
  50
  51 #include "extcap.h"
  52 #include "extcap_parser.h"
  53
  54 #ifdef _WIN32
  55 static HANDLE pipe_h = NULL;
  56 #endif
  57
  58 /* internal container, for all the extcap interfaces that have been found.
  59  * will be resetted by every call to extcap_interface_list() and is being
  60  * used in extcap_get_if_* as well as extcaps_init_initerfaces to ensure,
  61  * that only extcap interfaces are being given to underlying extcap programs
  62  */
  63 static GHashTable *ifaces = NULL;
  64
  65 /* Prefix for the pipe interfaces */
  66 #define EXTCAP_PIPE_PREFIX "wireshark_extcap"
  67
  68 /* Callback definition for extcap_foreach */
  69 typedef gboolean (*extcap_cb_t)(const gchar *extcap, gchar *output, void *data,
  70         gchar **err_str);
  71
  72 /* #define ARG_DEBUG */
  73 #if ARG_DEBUG
  74 static void extcap_debug_arguments ( extcap_arg *arg_iter );
  75 #endif
  76
  77 static gboolean
  78 extcap_if_exists(const char *ifname)
  79 {
  80     if ( ifname != NULL )
  81     {
  82         if ( ifaces != NULL )
  83         {
  84             if ( g_hash_table_size(ifaces) > 0 )
  85             {
  86                 if ( g_hash_table_lookup(ifaces, (const gchar *)ifname) != NULL )
  87                 {
  88                     return TRUE;
  89                 }
  90             }
  91         }
  92     }
  93     return FALSE;
  94 }
  95
  96 static gboolean
  97 extcap_if_exists_for_extcap(const char *ifname, const char *extcap)
  98 {
  99     gchar * entry = NULL;
 100
 101     if ( extcap_if_exists(ifname) )
 102     {
 103         if ( ( entry = (gchar *)g_hash_table_lookup(ifaces, (const gchar *)ifname) ) != NULL )
 104         {
 105             if ( strcmp(entry, extcap) == 0 )
 106                 return TRUE;
 107         }
 108     }
 109
 110     return FALSE;
 111 }
 112
 113 static gchar *
 114 extcap_if_executable(const char *ifname)
 115 {
 116     if ( extcap_if_exists(ifname) )
 117         return (gchar *)g_hash_table_lookup(ifaces, (const gchar *)ifname);
 118
 119     return (gchar *)NULL;
 120 }
 121
 122 static void
 123 extcap_if_cleanup(void)
 124 {
 125     if ( ifaces == NULL )
 126         ifaces = g_hash_table_new(g_str_hash, g_str_equal);
 127
 128     g_hash_table_remove_all(ifaces);
 129 }
 130
 131 static void
 132 extcap_if_add(gchar *ifname, gchar *extcap)
 133 {
 134     if ( g_hash_table_lookup(ifaces, ifname) == NULL )
 135         g_hash_table_insert(ifaces, ifname, extcap);
 136 }
 137
 138 static void extcap_foreach(gint argc, gchar **args, extcap_cb_t cb,
 139         void *cb_data, char **err_str, const char * ifname _U_) {
 140     const char *dirname = get_extcap_dir();
 141     GDir *dir;
 142     const gchar *file;
 143     gboolean keep_going;
 144     gchar **argv;
 145
 146     keep_going = TRUE;
 147
 148     argv = (gchar **) g_malloc0(sizeof(gchar *) * (argc + 2));
 149
 150     if ((dir = g_dir_open(dirname, 0, NULL)) != NULL) {
 151 #ifdef WIN32
 152         dirname = g_strescape(dirname,NULL);
 153 #endif
 154         while (keep_going && (file = g_dir_read_name(dir)) != NULL ) {
 155             GString *extcap_string = NULL;
 156             gchar *extcap = NULL;
 157             gchar *command_output = NULL;
 158             gboolean status = FALSE;
 159             gint i;
 160             gint exit_status = 0;
 161             GError *error = NULL;
 162
 163             /* full path to extcap binary */
 164             extcap_string = g_string_new("");
 165 #ifdef WIN32
 166             g_string_printf(extcap_string, "%s\\\\%s",dirname,file);
 167             extcap = g_string_free(extcap_string, FALSE);
 168 #else
 169             g_string_printf(extcap_string, "%s/%s", dirname, file);
 170             extcap = g_string_free(extcap_string, FALSE);
 171 #endif
 172             if ( extcap_if_exists(ifname) && !extcap_if_exists_for_extcap(ifname, extcap ) )
 173                 continue;
 174
 175             argv[0] = extcap;
 176             for (i = 0; i < argc; ++i)
 177                 argv[i+1] = args[i];
 178             argv[argc+1] = NULL;
 179
 180             status = g_spawn_sync(dirname, argv, NULL,
 181                 (GSpawnFlags) 0, NULL, NULL,
 182                     &command_output, NULL, &exit_status, &error);
 183
 184             if (status && exit_status == 0)
 185             keep_going = cb(extcap, command_output, cb_data, err_str);
 186
 187             g_free(extcap);
 188             g_free(command_output);
 189         }
 190
 191         g_dir_close(dir);
 192     }
 193
 194     g_free(argv);
 195 }
 196
 197 static gboolean dlt_cb(const gchar *extcap _U_, gchar *output, void *data,
 198         char **err_str) {
 199     extcap_token_sentence *tokens;
 200     extcap_dlt *dlts, *dlt_iter, *next;
 201     if_capabilities_t *caps;
 202     GList *linktype_list = NULL;
 203     data_link_info_t *data_link_info;
 204
 205     tokens = extcap_tokenize_sentences(output);
 206     extcap_parse_dlts(tokens, &dlts);
 207
 208     extcap_free_tokenized_sentence_list(tokens);
 209
 210     g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "Extcap pipe %s ", extcap);
 211
 212     /*
 213      * Allocate the interface capabilities structure.
 214      */
 215     caps = (if_capabilities_t *) g_malloc(sizeof *caps);
 216     caps->can_set_rfmon = FALSE;
 217
 218     dlt_iter = dlts;
 219     while (dlt_iter != NULL ) {
 220         g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,
 221                 "  DLT %d name=\"%s\" display=\"%s\" ", dlt_iter->number,
 222                 dlt_iter->name, dlt_iter->display);
 223
 224         data_link_info = g_new(data_link_info_t, 1);
 225         data_link_info->dlt = dlt_iter->number;
 226         data_link_info->name = g_strdup(dlt_iter->name);
 227         data_link_info->description = g_strdup(dlt_iter->display);
 228         linktype_list = g_list_append(linktype_list, data_link_info);
 229         dlt_iter = dlt_iter->next_dlt;
 230     }
 231
 232     /* Check to see if we built a list */
 233     if (linktype_list != NULL && data != NULL) {
 234         caps->data_link_types = linktype_list;
 235         *(if_capabilities_t **) data = caps;
 236     } else {
 237         if (err_str) {
 238             g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "  returned no DLTs");
 239             *err_str = g_strdup("Extcap returned no DLTs");
 240         }
 241         g_free(caps);
 242     }
 243
 244     dlt_iter = dlts;
 245     while (dlt_iter != NULL ) {
 246         next = dlt_iter->next_dlt;
 247         extcap_free_dlt(dlt_iter);
 248         dlt_iter = next;
 249     }
 250
 251     return FALSE;
 252 }
 253
 254 if_capabilities_t *
 255 extcap_get_if_dlts(const gchar *ifname, char **err_str) {
 256     gchar *argv[3];
 257     gint i;
 258     if_capabilities_t *caps = NULL;
 259
 260     if (ifname != NULL && err_str != NULL)
 261         *err_str = NULL;
 262
 263     if ( extcap_if_exists(ifname) )
 264     {
 265         argv[0] = g_strdup(EXTCAP_ARGUMENT_LIST_DLTS);
 266         argv[1] = g_strdup(EXTCAP_ARGUMENT_INTERFACE);
 267         argv[2] = g_strdup(ifname);
 268
 269         if (err_str)
 270             *err_str = NULL;
 271         extcap_foreach(3, argv, dlt_cb, &caps, err_str, ifname);
 272
 273         for (i = 0; i < 3; ++i)
 274             g_free(argv[i]);
 275     }
 276
 277     return caps;
 278 }
 279
 280 static gboolean interfaces_cb(const gchar *extcap, gchar *output, void *data,
 281         char **err_str _U_) {
 282     GList **il = (GList **) data;
 283     extcap_token_sentence *tokens;
 284     extcap_interface *interfaces, *int_iter; /*, *next; */
 285     if_info_t *if_info;
 286
 287     tokens = extcap_tokenize_sentences(output);
 288     extcap_parse_interfaces(tokens, &interfaces);
 289
 290     extcap_free_tokenized_sentence_list(tokens);
 291
 292     g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "Extcap pipe %s ", extcap);
 293
 294     int_iter = interfaces;
 295     while (int_iter != NULL ) {
 296         if ( extcap_if_exists(int_iter->call) )
 297         {
 298             g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_WARNING, "Extcap interface \"%s\" is already provided by \"%s\" ",
 299                     int_iter->call, (gchar *)extcap_if_executable(int_iter->call) );
 300             int_iter = int_iter->next_interface;
 301             continue;
 302         }
 303
 304         g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "  Interface [%s] \"%s\" ",
 305                 int_iter->call, int_iter->display);
 306
 307         if_info = g_new0(if_info_t, 1);
 308         if_info->name = g_strdup(int_iter->call);
 309         if_info->friendly_name = g_strdup(int_iter->display);
 310
 311         if_info->type = IF_EXTCAP;
 312
 313         if_info->extcap = g_strdup(extcap);
 314         *il = g_list_append(*il, if_info);
 315
 316         extcap_if_add(g_strdup(int_iter->call), g_strdup(extcap) );
 317         int_iter = int_iter->next_interface;
 318     }
 319
 320     return TRUE;
 321 }
 322
 323 GList *
 324 extcap_interface_list(char **err_str) {
 325     gchar *argv;
 326     /* gint i; */
 327     GList *ret = NULL;
 328
 329     if (err_str != NULL)
 330     *err_str = NULL;
 331
 332     extcap_if_cleanup();
 333
 334     argv = g_strdup(EXTCAP_ARGUMENT_LIST_INTERFACES);
 335
 336     if (err_str)
 337     *err_str = NULL;
 338     extcap_foreach(1, &argv, interfaces_cb, &ret, err_str, NULL);
 339
 340     g_free(argv);
 341
 342     return ret;
 343 }
 344
 345 static void g_free_1(gpointer data, gpointer user_data _U_)
 346 {
 347     g_free(data);
 348 }
 349
 350 static void extcap_free_if_configuration(GList *list)
 351 {
 352     GList *elem;
 353
 354     for (elem = g_list_first(list); elem; elem = elem->next)
 355     {
 356         GList *arg_list;
 357         if (elem->data == NULL)
 358         {
 359             continue;
 360         }
 361
 362         arg_list = g_list_first((GList *)elem->data);
 363         g_list_foreach(arg_list, g_free_1, NULL);
 364         g_list_free(arg_list);
 365     }
 366     g_list_free(list);
 367 }
 368
 369 static gboolean search_cb(const gchar *extcap _U_, gchar *output, void *data,
 370         char **err_str _U_) {
 371     extcap_token_sentence *tokens = NULL;
 372     GList *arguments = NULL;
 373     GList **il = (GList **) data;
 374
 375     tokens = extcap_tokenize_sentences(output);
 376     arguments = extcap_parse_args(tokens);
 377
 378     extcap_free_tokenized_sentence_list(tokens);
 379
 380 #if ARG_DEBUG
 381     extcap_debug_arguments ( arguments );
 382 #endif
 383
 384     *il = g_list_append(*il, arguments);
 385
 386     /* By returning false, extcap_foreach will break on first found */
 387     return TRUE;
 388 }
 389
 390 GList *
 391 extcap_get_if_configuration(const char * ifname) {
 392     gchar *argv[4];
 393     GList *ret = NULL;
 394     gchar **err_str = NULL;
 395
 396     if ( extcap_if_exists(ifname) )
 397     {
 398         g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "Extcap path %s",
 399                 get_extcap_dir());
 400
 401         if (err_str != NULL)
 402         *err_str = NULL;
 403
 404         argv[0] = g_strdup(EXTCAP_ARGUMENT_CONFIG);
 405         argv[1] = g_strdup(EXTCAP_ARGUMENT_INTERFACE);
 406         argv[2] = g_strdup(ifname);
 407         argv[3] = NULL;
 408
 409         extcap_foreach(4, argv, search_cb, &ret, err_str, ifname);
 410     }
 411
 412     return ret;
 413 }
 414
 415 void extcap_cleanup(capture_options * capture_opts) {
 416     interface_options interface_opts;
 417     guint icnt = 0;
 418
 419     for (icnt = 0; icnt < capture_opts->ifaces->len; icnt++) {
 420         interface_opts = g_array_index(capture_opts->ifaces, interface_options,
 421                 icnt);
 422
 423         /* skip native interfaces */
 424         if (interface_opts.if_type != IF_EXTCAP)
 425         continue;
 426
 427         g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,
 428                 "Extcap [%s] - Cleaning up fifo: %s; PID: %d", interface_opts.name,
 429                 interface_opts.extcap_fifo, interface_opts.extcap_pid);
 430 #ifdef WIN32
 431         if (pipe_h)
 432         {
 433             g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,
 434                 "Extcap [%s] - Closing pipe", interface_opts.name);
 435             FlushFileBuffers(pipe_h);
 436             DisconnectNamedPipe(pipe_h);
 437             CloseHandle(pipe_h);
 438         }
 439 #else
 440         if (interface_opts.extcap_fifo != NULL && file_exists(interface_opts.extcap_fifo))
 441         {
 442             /* the fifo will not be freed here, but with the other capture_opts in capture_sync */
 443             ws_unlink(interface_opts.extcap_fifo);
 444             interface_opts.extcap_fifo = NULL;
 445         }
 446 #endif
 447         /* Maybe the client closed and removed fifo, but ws should check if
 448          * pid should be closed */
 449         g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,
 450                 "Extcap [%s] - Closing spawned PID: %d", interface_opts.name,
 451                 interface_opts.extcap_pid);
 452
 453         if (interface_opts.extcap_child_watch > 0)
 454         {
 455             g_source_remove(interface_opts.extcap_child_watch);
 456             interface_opts.extcap_child_watch = 0;
 457         }
 458
 459         if (interface_opts.extcap_pid != INVALID_EXTCAP_PID)
 460         {
 461 #ifdef WIN32
 462             TerminateProcess(interface_opts.extcap_pid, 0);
 463 #endif
 464             g_spawn_close_pid(interface_opts.extcap_pid);
 465             interface_opts.extcap_pid = INVALID_EXTCAP_PID;
 466         }
 467
 468         /* Make sure modified interface_opts is saved in capture_opts. */
 469         capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, icnt);
 470         g_array_insert_val(capture_opts->ifaces, icnt, interface_opts);
 471     }
 472 }
 473
 474 static void
 475 extcap_arg_cb(gpointer key, gpointer value, gpointer data) {
 476     GPtrArray *args = (GPtrArray *)data;
 477
 478     if ( key != NULL )
 479     {
 480         g_ptr_array_add(args, g_strdup((const gchar*)key));
 481
 482         if ( value != NULL )
 483             g_ptr_array_add(args, g_strdup((const gchar*)value));
 484     }
 485 }
 486
 487 static void extcap_child_watch_cb(GPid pid, gint status _U_, gpointer user_data)
 488 {
 489     guint i;
 490     interface_options interface_opts;
 491     capture_options *capture_opts = (capture_options *)user_data;
 492
 493     /* Close handle to child process. */
 494     g_spawn_close_pid(pid);
 495
 496     /* Update extcap_pid in interface options structure. */
 497     for (i = 0; i < capture_opts->ifaces->len; i++)
 498     {
 499         interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
 500         if (interface_opts.extcap_pid == pid)
 501         {
 502             interface_opts.extcap_pid = INVALID_EXTCAP_PID;
 503             interface_opts.extcap_child_watch = 0;
 504             capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, i);
 505             g_array_insert_val(capture_opts->ifaces, i, interface_opts);
 506             break;
 507         }
 508     }
 509 }
 510
 511 /* call mkfifo for each extcap,
 512  * returns FALSE if there's an error creating a FIFO */
 513 gboolean
 514 extcaps_init_initerfaces(capture_options *capture_opts)
 515 {
 516     guint i;
 517     interface_options interface_opts;
 518
 519     for (i = 0; i < capture_opts->ifaces->len; i++)
 520     {
 521         GPtrArray *args = NULL;
 522         GPid pid = INVALID_EXTCAP_PID;
 523         gchar **tmp;
 524         int tmp_i;
 525
 526         interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
 527
 528         /* skip native interfaces */
 529         if (interface_opts.if_type != IF_EXTCAP )
 530             continue;
 531
 532         /* create pipe for fifo */
 533         if ( ! extcap_create_pipe ( &interface_opts.extcap_fifo ) )
 534             return FALSE;
 535
 536         /* Create extcap call */
 537         args = g_ptr_array_new();
 538 #define add_arg(X) g_ptr_array_add(args, g_strdup(X))
 539
 540         add_arg(interface_opts.extcap);
 541         add_arg(EXTCAP_ARGUMENT_RUN_CAPTURE);
 542         add_arg(EXTCAP_ARGUMENT_INTERFACE);
 543         add_arg(interface_opts.name);
 544         add_arg(EXTCAP_ARGUMENT_RUN_PIPE);
 545         add_arg(interface_opts.extcap_fifo);
 546         if (interface_opts.extcap_args == NULL)
 547         {
 548             /* User did not perform interface configuration.
 549              *
 550              * Check if there are any boolean flags that are set by default
 551              * and hence their argument should be added.
 552              */
 553             GList *arglist;
 554             GList *elem;
 555
 556             arglist = extcap_get_if_configuration(interface_opts.name);
 557             for (elem = g_list_first(arglist); elem; elem = elem->next)
 558             {
 559                 GList * arg_list;
 560                 extcap_arg *arg_iter;
 561
 562                 if (elem->data == NULL)
 563                 {
 564                     continue;
 565                 }
 566
 567                 arg_list = g_list_first((GList *)elem->data);
 568                 while (arg_list != NULL)
 569                 {
 570                     /* In case of boolflags only first element in arg_list is relevant. */
 571                     arg_iter = (extcap_arg*) (arg_list->data);
 572
 573                     if  (arg_iter->arg_type == EXTCAP_ARG_BOOLFLAG)
 574                     {
 575                         if (arg_iter->default_complex != NULL
 576                             && extcap_complex_get_bool(arg_iter->default_complex))
 577                         {
 578                             add_arg(arg_iter->call);
 579                         }
 580                     }
 581
 582                     arg_list = arg_list->next;
 583                 }
 584             }
 585
 586             extcap_free_if_configuration(arglist);
 587         }
 588         else
 589         {
 590             g_hash_table_foreach(interface_opts.extcap_args, extcap_arg_cb, args);
 591         }
 592         add_arg(NULL);
 593 #undef add_arg
 594
 595         /* Dump commandline parameters sent to extcap. */
 596         for (tmp = (gchar **)args->pdata, tmp_i = 0; *tmp && **tmp; ++tmp_i, ++tmp)
 597         {
 598             g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "argv[%d]: %s", tmp_i, *tmp);
 599         }
 600
 601         /* Wireshark for windows crashes here sometimes *
 602          * Access violation reading location 0x...      */
 603         g_spawn_async(NULL, (gchar **)args->pdata, NULL,
 604                     (GSpawnFlags) G_SPAWN_DO_NOT_REAP_CHILD, NULL, NULL,
 605                     &pid,NULL);
 606
 607         g_ptr_array_foreach(args, (GFunc)g_free, NULL);
 608         g_ptr_array_free(args, TRUE);
 609         interface_opts.extcap_pid = pid;
 610         interface_opts.extcap_child_watch =
 611             g_child_watch_add(pid, extcap_child_watch_cb, (gpointer)capture_opts);
 612         capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, i);
 613         g_array_insert_val(capture_opts->ifaces, i, interface_opts);
 614
 615 #ifdef WIN32
 616         /* On Windows, wait for extcap to connect to named pipe.
 617          * Some extcaps will present UAC screen to user.
 618          * 30 second timeout should be reasonable timeout for extcap to
 619          * connect to named pipe (including user interaction).
 620          * Wait on multiple object in case of extcap termination
 621          * without opening pipe.
 622          *
 623          * Minimum supported version of Windows: XP / Server 2003.
 624          */
 625         if (pid != INVALID_EXTCAP_PID)
 626         {
 627             DWORD dw;
 628             HANDLE handles[2];
 629             OVERLAPPED ov;
 630             ov.Pointer = 0;
 631             ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
 632
 633             ConnectNamedPipe(pipe_h, &ov);
 634             handles[0] = ov.hEvent;
 635             handles[1] = pid;
 636
 637             if (GetLastError() == ERROR_PIPE_CONNECTED)
 638             {
 639                 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "extcap connected to pipe");
 640             }
 641             else
 642             {
 643                 dw = WaitForMultipleObjects(2, handles, FALSE, 30000);
 644                 if (dw == WAIT_OBJECT_0)
 645                 {
 646                     /* ConnectNamedPipe finished. */
 647                     DWORD code;
 648
 649                     code = GetLastError();
 650                     if (code == ERROR_IO_PENDING)
 651                     {
 652                         DWORD dummy;
 653                         if (!GetOverlappedResult(ov.hEvent, &ov, &dummy, TRUE))
 654                         {
 655                             code = GetLastError();
 656                         }
 657                         else
 658                         {
 659                             code = ERROR_SUCCESS;
 660                         }
 661                     }
 662
 663                     g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "ConnectNamedPipe code: %d", code);
 664                 }
 665                 else if (dw == (WAIT_OBJECT_0 + 1))
 666                 {
 667                     /* extcap process terminated. */
 668                     g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "extcap terminated without connecting to pipe!");
 669                 }
 670                 else if (dw == WAIT_TIMEOUT)
 671                 {
 672                     g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "extcap didn't connect to pipe within 30 seconds!");
 673                 }
 674                 else
 675                 {
 676                     g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "WaitForMultipleObjects returned 0x%08X. Error %d", dw, GetLastError());
 677                 }
 678             }
 679
 680             CloseHandle(ov.hEvent);
 681         }
 682 #endif
 683     }
 684
 685     return TRUE;
 686 }
 687
 688 #ifdef WIN32
 689 /* called by capture_sync to get the CreatNamedPipe handle*/
 690 HANDLE
 691 extcap_get_win32_handle()
 692 {
 693     return pipe_h;
 694 }
 695 #endif
 696
 697 gboolean extcap_create_pipe(char ** fifo)
 698 {
 699 #ifdef WIN32
 700     gchar timestr[ 14+1 ];
 701     time_t current_time;
 702
 703     gchar *pipename = NULL;
 704
 705     SECURITY_ATTRIBUTES security;
 706     /* create pipename */
 707     current_time = time(NULL);
 708     strftime(timestr, sizeof(timestr), "%Y%m%d%H%M%S", localtime(&current_time));
 709     pipename = g_strconcat ( "\\\\.\\pipe\\", EXTCAP_PIPE_PREFIX, "_", timestr, NULL );
 710
 711     /* Security struct to enable Inheritable HANDLE */
 712     memset(&security, 0, sizeof(SECURITY_ATTRIBUTES));
 713     security.nLength = sizeof(SECURITY_ATTRIBUTES);
 714     security.bInheritHandle = TRUE;
 715     security.lpSecurityDescriptor = NULL;
 716
 717     /* create a namedPipe*/
 718     pipe_h = CreateNamedPipe(
 719                 utf_8to16(pipename),
 720                 PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
 721                 PIPE_TYPE_MESSAGE| PIPE_READMODE_MESSAGE | PIPE_WAIT,
 722                 5, 65536, 65536,
 723                 300,
 724                 &security);
 725
 726     if (pipe_h == INVALID_HANDLE_VALUE)
 727     {
 728         g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,"\nError creating pipe => (%d)", GetLastError());
 729         return FALSE;
 730     }
 731     else
 732     {
 733         g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,"\nWireshark Created pipe =>(%s)",pipename);
 734         *fifo = g_strdup(pipename);
 735     }
 736 #else
 737     gchar *temp_name = NULL;
 738     int fd = 0;
 739
 740     if ( ( fd = create_tempfile ( &temp_name, EXTCAP_PIPE_PREFIX ) ) == 0 )
 741         return FALSE;
 742
 743     ws_close(fd);
 744
 745     g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,
 746             "Extcap - Creating fifo: %s", temp_name);
 747
 748     if ( file_exists(temp_name) )
 749         ws_unlink(temp_name);
 750
 751     if (mkfifo(temp_name, 0600) == 0)
 752         *fifo = g_strdup(temp_name);
 753 #endif
 754
 755     return TRUE;
 756 }
 757
 758 #if ARG_DEBUG
 759 void extcap_debug_arguments ( extcap_arg *arg_iter )
 760 {
 761     extcap_value *v = NULL;
 762     GList *walker = NULL;
 763
 764     printf("debug - parser dump\n");
 765     while (arg_iter != NULL) {
 766         printf("ARG %d call=%s display=\"%s\" type=", arg_iter->arg_num, arg_iter->call, arg_iter->display);
 767
 768         switch (arg_iter->arg_type) {
 769             case EXTCAP_ARG_INTEGER:
 770             printf("int\n");
 771             break;
 772             case EXTCAP_ARG_UNSIGNED:
 773             printf("unsigned\n");
 774             break;
 775             case EXTCAP_ARG_LONG:
 776             printf("long\n");
 777             break;
 778             case EXTCAP_ARG_DOUBLE:
 779             printf("double\n");
 780             break;
 781             case EXTCAP_ARG_BOOLEAN:
 782             printf("boolean\n");
 783             break;
 784             case EXTCAP_ARG_MENU:
 785             printf("menu\n");
 786             break;
 787             case EXTCAP_ARG_RADIO:
 788             printf("radio\n");
 789             break;
 790             case EXTCAP_ARG_SELECTOR:
 791             printf("selctor\n");
 792             break;
 793             case EXTCAP_ARG_STRING:
 794             printf ( "string\n" );
 795             break;
 796             case EXTCAP_ARG_MULTICHECK:
 797             printf ( "unknown\n" );
 798             break;
 799             case EXTCAP_ARG_UNKNOWN:
 800             printf ( "unknown\n" );
 801             break;
 802         }
 803
 804         if (arg_iter->range_start != NULL && arg_iter->range_end != NULL) {
 805             printf("\tRange: ");
 806             extcap_printf_complex(arg_iter->range_start);
 807             printf(" - ");
 808             extcap_printf_complex(arg_iter->range_end);
 809             printf("\n");
 810         }
 811
 812         for ( walker = g_list_first ( arg_iter->value_list ); walker; walker = walker->next )
 813         {
 814             v = (extcap_value *)walker->data;
 815             if (v->is_default == TRUE)
 816             printf("*");
 817             printf("\tcall=\"%p\" display=\"%p\"\n", v->call, v->display);
 818             printf("\tcall=\"%s\" display=\"%s\"\n", v->call, v->display);
 819         }
 820
 821         arg_iter = arg_iter->next_arg;
 822     }
 823 }
 824 #endif
 825 #endif
 826
 827 /*
 828  * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 829  *
 830  * Local variables:
 831  * c-basic-offset: 4
 832  * tab-width: 8
 833  * indent-tabs-mode: nil
 834  * End:
 835  *
 836  * vi: set shiftwidth=4 tabstop=8 expandtab:
 837  * :indentSize=4:tabSize=8:noTabs=true:
 838  */