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         g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "  returned no DLTs");
 261
 262         if (ifname != NULL && err_str != NULL)
 263                 *err_str = NULL;
 264
 265         if ( extcap_if_exists(ifname) )
 266         {
 267                 argv[0] = g_strdup(EXTCAP_ARGUMENT_LIST_DLTS);
 268                 argv[1] = g_strdup(EXTCAP_ARGUMENT_INTERFACE);
 269                 argv[2] = g_strdup(ifname);
 270
 271                 if (err_str)
 272                         *err_str = NULL;
 273                 extcap_foreach(3, argv, dlt_cb, &caps, err_str, ifname);
 274
 275                 for (i = 0; i < 3; ++i)
 276                         g_free(argv[i]);
 277         }
 278
 279         return caps;
 280 }
 281
 282 static gboolean interfaces_cb(const gchar *extcap, gchar *output, void *data,
 283                 char **err_str _U_) {
 284         GList **il = (GList **) data;
 285         extcap_token_sentence *tokens;
 286         extcap_interface *interfaces, *int_iter; /*, *next; */
 287         if_info_t *if_info;
 288
 289         tokens = extcap_tokenize_sentences(output);
 290         extcap_parse_interfaces(tokens, &interfaces);
 291
 292         extcap_free_tokenized_sentence_list(tokens);
 293
 294         g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "Extcap pipe %s ", extcap);
 295
 296         int_iter = interfaces;
 297         while (int_iter != NULL ) {
 298                 if ( extcap_if_exists(int_iter->call) )
 299                 {
 300                         g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_WARNING, "Extcap interface \"%s\" is already provided by \"%s\" ",
 301                                         int_iter->call, (gchar *)extcap_if_executable(int_iter->call) );
 302                         int_iter = int_iter->next_interface;
 303                         continue;
 304                 }
 305
 306                 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "  Interface [%s] \"%s\" ",
 307                                 int_iter->call, int_iter->display);
 308
 309                 if_info = g_new0(if_info_t, 1);
 310                 if_info->name = g_strdup(int_iter->call);
 311                 if_info->friendly_name = g_strdup(int_iter->display);
 312
 313                 if_info->type = IF_EXTCAP;
 314
 315                 if_info->extcap = g_strdup(extcap);
 316                 *il = g_list_append(*il, if_info);
 317
 318                 extcap_if_add(g_strdup(int_iter->call), g_strdup(extcap) );
 319                 int_iter = int_iter->next_interface;
 320         }
 321
 322         return TRUE;
 323 }
 324
 325 GList *
 326 extcap_interface_list(char **err_str) {
 327         gchar *argv;
 328         /* gint i; */
 329         GList *ret = NULL;
 330
 331         if (err_str != NULL)
 332         *err_str = NULL;
 333
 334         extcap_if_cleanup();
 335
 336         argv = g_strdup(EXTCAP_ARGUMENT_LIST_INTERFACES);
 337
 338         if (err_str)
 339         *err_str = NULL;
 340         extcap_foreach(1, &argv, interfaces_cb, &ret, err_str, NULL);
 341
 342         g_free(argv);
 343
 344         return ret;
 345 }
 346
 347 static gboolean search_cb(const gchar *extcap _U_, gchar *output, void *data,
 348                 char **err_str _U_) {
 349         extcap_token_sentence *tokens = NULL;
 350         GList *arguments = NULL;
 351         GList **il = (GList **) data;
 352
 353         tokens = extcap_tokenize_sentences(output);
 354         arguments = extcap_parse_args(tokens);
 355
 356         extcap_free_tokenized_sentence_list(tokens);
 357
 358 #if ARG_DEBUG
 359         extcap_debug_arguments ( arguments );
 360 #endif
 361
 362         *il = g_list_append(*il, arguments);
 363
 364         /* By returning false, extcap_foreach will break on first found */
 365         return TRUE;
 366 }
 367
 368 GList *
 369 extcap_get_if_configuration(const char * ifname) {
 370         gchar *argv[4];
 371         GList *ret = NULL;
 372         gchar **err_str = NULL;
 373
 374         if ( extcap_if_exists(ifname) )
 375         {
 376                 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "Extcap path %s",
 377                                 get_extcap_dir());
 378
 379                 if (err_str != NULL)
 380                 *err_str = NULL;
 381
 382                 argv[0] = g_strdup(EXTCAP_ARGUMENT_CONFIG);
 383                 argv[1] = g_strdup(EXTCAP_ARGUMENT_INTERFACE);
 384                 argv[2] = g_strdup(ifname);
 385                 argv[3] = NULL;
 386
 387                 extcap_foreach(4, argv, search_cb, &ret, err_str, ifname);
 388         }
 389
 390         return ret;
 391 }
 392
 393 void extcap_cleanup(capture_options * capture_opts) {
 394         interface_options interface_opts;
 395         guint icnt = 0;
 396
 397         for (icnt = 0; icnt < capture_opts->ifaces->len; icnt++) {
 398                 interface_opts = g_array_index(capture_opts->ifaces, interface_options,
 399                                 icnt);
 400
 401                 /* skip native interfaces */
 402                 if (interface_opts.if_type != IF_EXTCAP)
 403                 continue;
 404
 405                 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,
 406                                 "Extcap [%s] - Cleaning up fifo: %s; PID: %d", interface_opts.name,
 407                                 interface_opts.extcap_fifo, interface_opts.extcap_pid);
 408 #ifdef WIN32
 409                 if (pipe_h)
 410                 {
 411                         g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,
 412                                 "Extcap [%s] - Closing pipe", interface_opts.name);
 413                         FlushFileBuffers(pipe_h);
 414                         DisconnectNamedPipe(pipe_h);
 415                         CloseHandle(pipe_h);
 416                 }
 417 #else
 418                 if (interface_opts.extcap_fifo != NULL && file_exists(interface_opts.extcap_fifo))
 419                 {
 420                         /* the fifo will not be freed here, but with the other capture_opts in capture_sync */
 421                         ws_unlink(interface_opts.extcap_fifo);
 422                         interface_opts.extcap_fifo = NULL;
 423                 }
 424 #endif
 425                 /* Maybe the client closed and removed fifo, but ws should check if
 426                  * pid should be closed */
 427                 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,
 428                                 "Extcap [%s] - Closing spawned PID: %d", interface_opts.name,
 429                                 interface_opts.extcap_pid);
 430
 431                 if (interface_opts.extcap_child_watch > 0)
 432                 {
 433                         g_source_remove(interface_opts.extcap_child_watch);
 434                         interface_opts.extcap_child_watch = 0;
 435                 }
 436
 437 #ifdef WIN32
 438                 if (interface_opts.extcap_pid != INVALID_HANDLE_VALUE)
 439                 {
 440                         TerminateProcess(interface_opts.extcap_pid, 0);
 441                         g_spawn_close_pid(interface_opts.extcap_pid);
 442                         interface_opts.extcap_pid = INVALID_HANDLE_VALUE;
 443                 }
 444 #else
 445                 if (interface_opts.extcap_pid != (GPid)-1 )
 446                 {
 447                         g_spawn_close_pid(interface_opts.extcap_pid);
 448                         interface_opts.extcap_pid = (GPid)-1;
 449                 }
 450 #endif
 451         }
 452 }
 453
 454 static void
 455 extcap_arg_cb(gpointer key, gpointer value, gpointer data) {
 456         GPtrArray *args = (GPtrArray *)data;
 457
 458         if ( key != NULL )
 459         {
 460                 g_ptr_array_add(args, key);
 461
 462                 if ( value != NULL )
 463                         g_ptr_array_add(args, value);
 464         }
 465 }
 466
 467 static void extcap_child_watch_cb(GPid pid, gint status _U_, gpointer user_data)
 468 {
 469         guint i;
 470         interface_options interface_opts;
 471         capture_options *capture_opts = (capture_options *)user_data;
 472
 473         /* Close handle to child process. */
 474         g_spawn_close_pid(pid);
 475
 476         /* Update extcap_pid in interface options structure. */
 477         for (i = 0; i < capture_opts->ifaces->len; i++)
 478         {
 479                 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
 480                 if (interface_opts.extcap_pid == pid)
 481                 {
 482 #ifdef WIN32
 483                         interface_opts.extcap_pid = INVALID_HANDLE_VALUE;
 484 #else
 485                         interface_opts.extcap_pid = (GPid)-1;
 486 #endif
 487                         interface_opts.extcap_child_watch = 0;
 488                         capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, i);
 489                         g_array_insert_val(capture_opts->ifaces, i, interface_opts);
 490                         break;
 491                 }
 492         }
 493 }
 494
 495 /* call mkfifo for each extcap,
 496  * returns FALSE if there's an error creating a FIFO */
 497 gboolean
 498 extcaps_init_initerfaces(capture_options *capture_opts)
 499 {
 500         guint i;
 501         interface_options interface_opts;
 502
 503         for (i = 0; i < capture_opts->ifaces->len; i++)
 504         {
 505                 GPtrArray *args = NULL;
 506 #ifdef WIN32
 507                 GPid pid = INVALID_HANDLE_VALUE;
 508 #else
 509                 GPid pid = 0;
 510 #endif
 511                 gchar **tmp;
 512                 int tmp_i;
 513
 514                 interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
 515
 516                 /* skip native interfaces */
 517                 if (interface_opts.if_type != IF_EXTCAP )
 518                         continue;
 519
 520                 /* create pipe for fifo */
 521                 if ( ! extcap_create_pipe ( &interface_opts.extcap_fifo ) )
 522                         return FALSE;
 523
 524                 /* Create extcap call */
 525                 args = g_ptr_array_new();
 526 #define add_arg(X) g_ptr_array_add(args, g_strdup(X))
 527
 528                 add_arg(interface_opts.extcap);
 529                 add_arg(EXTCAP_ARGUMENT_RUN_CAPTURE);
 530                 add_arg(EXTCAP_ARGUMENT_INTERFACE);
 531                 add_arg(interface_opts.name);
 532                 add_arg(EXTCAP_ARGUMENT_RUN_PIPE);
 533                 add_arg(interface_opts.extcap_fifo);
 534                 if (interface_opts.extcap_args != NULL)
 535                         g_hash_table_foreach(interface_opts.extcap_args, extcap_arg_cb, args);
 536                 add_arg(NULL);
 537 #undef add_arg
 538
 539                 /* Dump commandline parameters sent to extcap. */
 540                 for (tmp = (gchar **)args->pdata, tmp_i = 0; *tmp && **tmp; ++tmp_i, ++tmp)
 541                 {
 542                         g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "argv[%d]: %s", tmp_i, *tmp);
 543                 }
 544
 545                 /* Wireshark for windows crashes here sometimes *
 546                  * Access violation reading location 0x...      */
 547                 g_spawn_async(NULL, (gchar **)args->pdata, NULL,
 548                                         (GSpawnFlags) G_SPAWN_DO_NOT_REAP_CHILD, NULL, NULL,
 549                                         &pid,NULL);
 550
 551                 g_ptr_array_foreach(args, (GFunc)g_free, NULL);
 552                 g_ptr_array_free(args, TRUE);
 553                 interface_opts.extcap_pid = pid;
 554                 interface_opts.extcap_child_watch =
 555                         g_child_watch_add(pid, extcap_child_watch_cb, (gpointer)capture_opts);
 556                 capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, i);
 557                 g_array_insert_val(capture_opts->ifaces, i, interface_opts);
 558
 559 #ifdef WIN32
 560                 /* On Windows, wait for extcap to connect to named pipe.
 561                  * Some extcaps will present UAC screen to user.
 562                  * 30 second timeout should be reasonable timeout for extcap to
 563                  * connect to named pipe (including user interaction).
 564                  * Wait on multiple object in case of extcap termination
 565                  * without opening pipe.
 566                  *
 567                  * Minimum supported version of Windows: XP / Server 2003.
 568                  */
 569                 if (pid != INVALID_HANDLE_VALUE)
 570                 {
 571                         DWORD dw;
 572                         HANDLE handles[2];
 573                         OVERLAPPED ov;
 574                         ov.Pointer = 0;
 575                         ov.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
 576
 577                         ConnectNamedPipe(pipe_h, &ov);
 578                         handles[0] = ov.hEvent;
 579                         handles[1] = pid;
 580
 581                         if (GetLastError() == ERROR_PIPE_CONNECTED)
 582                         {
 583                                 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "extcap connected to pipe");
 584                         }
 585                         else
 586                         {
 587                                 dw = WaitForMultipleObjects(2, handles, FALSE, 30000);
 588                                 if (dw == WAIT_OBJECT_0)
 589                                 {
 590                                         /* ConnectNamedPipe finished. */
 591                                         DWORD code;
 592
 593                                         code = GetLastError();
 594                                         if (code == ERROR_IO_PENDING)
 595                                         {
 596                                                 DWORD dummy;
 597                                                 if (!GetOverlappedResult(ov.hEvent, &ov, &dummy, TRUE))
 598                                                 {
 599                                                         code = GetLastError();
 600                                                 }
 601                                                 else
 602                                                 {
 603                                                         code = ERROR_SUCCESS;
 604                                                 }
 605                                         }
 606
 607                                         g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "ConnectNamedPipe code: %d", code);
 608                                 }
 609                                 else if (dw == (WAIT_OBJECT_0 + 1))
 610                                 {
 611                                         /* extcap process terminated. */
 612                                         g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "extcap terminated without connecting to pipe!");
 613                                 }
 614                                 else if (dw == WAIT_TIMEOUT)
 615                                 {
 616                                         g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "extcap didn't connect to pipe within 30 seconds!");
 617                                 }
 618                                 else
 619                                 {
 620                                         g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG, "WaitForMultipleObjects returned 0x%08X. Error %d", dw, GetLastError());
 621                                 }
 622                         }
 623
 624                         CloseHandle(ov.hEvent);
 625                 }
 626 #endif
 627         }
 628
 629         return TRUE;
 630 }
 631
 632 #ifdef WIN32
 633 /* called by capture_sync to get the CreatNamedPipe handle*/
 634 HANDLE
 635 extcap_get_win32_handle()
 636 {
 637         return pipe_h;
 638 }
 639 #endif
 640
 641 gboolean extcap_create_pipe(char ** fifo)
 642 {
 643 #ifdef WIN32
 644         gchar timestr[ 14+1 ];
 645         time_t current_time;
 646
 647         gchar *pipename = NULL;
 648
 649         SECURITY_ATTRIBUTES security;
 650         /* create pipename */
 651         current_time = time(NULL);
 652         strftime(timestr, sizeof(timestr), "%Y%m%d%H%M%S", localtime(&current_time));
 653         pipename = g_strconcat ( "\\\\.\\pipe\\", EXTCAP_PIPE_PREFIX, "_", timestr, NULL );
 654
 655         /* Security struct to enable Inheritable HANDLE */
 656         memset(&security, 0, sizeof(SECURITY_ATTRIBUTES));
 657         security.nLength = sizeof(SECURITY_ATTRIBUTES);
 658         security.bInheritHandle = TRUE;
 659         security.lpSecurityDescriptor = NULL;
 660
 661         /* create a namedPipe*/
 662         pipe_h = CreateNamedPipe(
 663                                 utf_8to16(pipename),
 664                                 PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED,
 665                                 PIPE_TYPE_MESSAGE| PIPE_READMODE_MESSAGE | PIPE_WAIT,
 666                                 5, 65536, 65536,
 667                                 300,
 668                                 &security);
 669
 670         if (pipe_h == INVALID_HANDLE_VALUE)
 671         {
 672                 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,"\nError creating pipe => (%d)", GetLastError());
 673                 return FALSE;
 674         }
 675         else
 676         {
 677                 g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,"\nWireshark Created pipe =>(%s)",pipename);
 678                 *fifo = g_strdup(pipename);
 679         }
 680 #else
 681         gchar *temp_name = NULL;
 682         int fd = 0;
 683
 684         if ( ( fd = create_tempfile ( &temp_name, EXTCAP_PIPE_PREFIX ) ) == 0 )
 685                 return FALSE;
 686
 687         ws_close(fd);
 688
 689         g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_DEBUG,
 690                         "Extcap - Creating fifo: %s", temp_name);
 691
 692         if ( file_exists(temp_name) )
 693                 ws_unlink(temp_name);
 694
 695         if (mkfifo(temp_name, 0600) == 0)
 696                 *fifo = g_strdup(temp_name);
 697 #endif
 698
 699         return TRUE;
 700 }
 701
 702 #if ARG_DEBUG
 703 void extcap_debug_arguments ( extcap_arg *arg_iter )
 704 {
 705         extcap_value *v = NULL;
 706         GList *walker = NULL;
 707
 708         printf("debug - parser dump\n");
 709         while (arg_iter != NULL) {
 710                 printf("ARG %d call=%s display=\"%s\" type=", arg_iter->arg_num, arg_iter->call, arg_iter->display);
 711
 712                 switch (arg_iter->arg_type) {
 713                         case EXTCAP_ARG_INTEGER:
 714                         printf("int\n");
 715                         break;
 716                         case EXTCAP_ARG_UNSIGNED:
 717                         printf("unsigned\n");
 718                         break;
 719                         case EXTCAP_ARG_LONG:
 720                         printf("long\n");
 721                         break;
 722                         case EXTCAP_ARG_DOUBLE:
 723                         printf("double\n");
 724                         break;
 725                         case EXTCAP_ARG_BOOLEAN:
 726                         printf("boolean\n");
 727                         break;
 728                         case EXTCAP_ARG_MENU:
 729                         printf("menu\n");
 730                         break;
 731                         case EXTCAP_ARG_RADIO:
 732                         printf("radio\n");
 733                         break;
 734                         case EXTCAP_ARG_SELECTOR:
 735                         printf("selctor\n");
 736                         break;
 737                         case EXTCAP_ARG_STRING:
 738                         printf ( "string\n" );
 739                         break;
 740                         case EXTCAP_ARG_MULTICHECK:
 741                         printf ( "unknown\n" );
 742                         break;
 743                         case EXTCAP_ARG_UNKNOWN:
 744                         printf ( "unknown\n" );
 745                         break;
 746                 }
 747
 748                 if (arg_iter->range_start != NULL && arg_iter->range_end != NULL) {
 749                         printf("\tRange: ");
 750                         extcap_printf_complex(arg_iter->range_start);
 751                         printf(" - ");
 752                         extcap_printf_complex(arg_iter->range_end);
 753                         printf("\n");
 754                 }
 755
 756                 for ( walker = g_list_first ( arg_iter->value_list ); walker; walker = walker->next )
 757                 {
 758                         v = (extcap_value *)walker->data;
 759                         if (v->is_default == TRUE)
 760                         printf("*");
 761                         printf("\tcall=\"%p\" display=\"%p\"\n", v->call, v->display);
 762                         printf("\tcall=\"%s\" display=\"%s\"\n", v->call, v->display);
 763                 }
 764
 765                 arg_iter = arg_iter->next_arg;
 766         }
 767 }
 768 #endif
 769 #endif
 770
 771 /*
 772  * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
 773  *
 774  * Local variables:
 775  * c-basic-offset: 4
 776  * tab-width: 4
 777  * indent-tabs-mode: t
 778  * End:
 779  *
 780  * vi: set shiftwidth=4 tabstop=4 noexpandtab:
 781  * :indentSize=4:tabSize=4:noTabs=false:
 782  */