capture_opts.c

   1 /* capture_opts.c
   2  * Routines for capture options setting
   3  *
   4  * $Id$
   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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  23  */
  24
  25 #ifdef HAVE_CONFIG_H
  26 # include "config.h"
  27 #endif
  28
  29 #ifdef HAVE_LIBPCAP
  30
  31 #include <string.h>
  32 #include <ctype.h>
  33
  34 #ifdef HAVE_UNISTD_H
  35 #include <unistd.h>
  36 #endif
  37
  38 #include <glib.h>
  39
  40 #include <epan/packet.h>
  41 #include <epan/prefs.h>
  42 #include "ui/simple_dialog.h"
  43 #include "capture_ui_utils.h"
  44
  45 #include "capture_opts.h"
  46 #include "ringbuffer.h"
  47 #include "clopts_common.h"
  48 #include "console_io.h"
  49 #include "cmdarg_err.h"
  50
  51 #include "capture_ifinfo.h"
  52 #include "capture-pcap-util.h"
  53 #include <wsutil/file_util.h>
  54
  55 static gboolean capture_opts_output_to_pipe(const char *save_file, gboolean *is_pipe);
  56
  57
  58 void
  59 capture_opts_init(capture_options *capture_opts, void *cf)
  60 {
  61   capture_opts->cf                              = cf;
  62   capture_opts->ifaces                          = g_array_new(FALSE, FALSE, sizeof(interface_options));
  63   capture_opts->all_ifaces                      = g_array_new(FALSE, FALSE, sizeof(interface_t));
  64   capture_opts->num_selected                    = 0;
  65   capture_opts->default_options.name            = NULL;
  66   capture_opts->default_options.descr           = NULL;
  67   capture_opts->default_options.cfilter         = NULL;
  68   capture_opts->default_options.has_snaplen     = FALSE;
  69   capture_opts->default_options.snaplen         = WTAP_MAX_PACKET_SIZE;
  70   capture_opts->default_options.linktype        = -1;
  71   capture_opts->default_options.promisc_mode    = TRUE;
  72 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
  73   capture_opts->default_options.buffer_size     = 1;                /* 1 MB */
  74 #endif
  75   capture_opts->default_options.monitor_mode    = FALSE;
  76 #ifdef HAVE_PCAP_REMOTE
  77   capture_opts->default_options.src_type        = CAPTURE_IFLOCAL;
  78   capture_opts->default_options.remote_host     = NULL;
  79   capture_opts->default_options.remote_port     = NULL;
  80   capture_opts->default_options.auth_type       = CAPTURE_AUTH_NULL;
  81   capture_opts->default_options.auth_username   = NULL;
  82   capture_opts->default_options.auth_password   = NULL;
  83   capture_opts->default_options.datatx_udp      = FALSE;
  84   capture_opts->default_options.nocap_rpcap     = TRUE;
  85   capture_opts->default_options.nocap_local     = FALSE;
  86 #endif
  87 #ifdef HAVE_PCAP_SETSAMPLING
  88   capture_opts->default_options.sampling_method = CAPTURE_SAMP_NONE;
  89   capture_opts->default_options.sampling_param  = 0;
  90 #endif
  91   capture_opts->saving_to_file                  = FALSE;
  92   capture_opts->save_file                       = NULL;
  93   capture_opts->group_read_access               = FALSE;
  94 #ifdef PCAP_NG_DEFAULT
  95   capture_opts->use_pcapng                      = TRUE;             /* Save as pcap-ng by default */
  96 #else
  97   capture_opts->use_pcapng                      = FALSE;            /* Save as pcap by default */
  98 #endif
  99   capture_opts->real_time_mode                  = TRUE;
 100   capture_opts->show_info                       = TRUE;
 101   capture_opts->quit_after_cap                  = getenv("WIRESHARK_QUIT_AFTER_CAPTURE") ? TRUE : FALSE;
 102   capture_opts->restart                         = FALSE;
 103
 104   capture_opts->multi_files_on                  = FALSE;
 105   capture_opts->has_file_duration               = FALSE;
 106   capture_opts->file_duration                   = 60;               /* 1 min */
 107   capture_opts->has_ring_num_files              = FALSE;
 108   capture_opts->ring_num_files                  = RINGBUFFER_MIN_NUM_FILES;
 109
 110   capture_opts->has_autostop_files              = FALSE;
 111   capture_opts->autostop_files                  = 1;
 112   capture_opts->has_autostop_packets            = FALSE;
 113   capture_opts->autostop_packets                = 0;
 114   capture_opts->has_autostop_filesize           = FALSE;
 115   capture_opts->autostop_filesize               = 1024;             /* 1 MB */
 116   capture_opts->has_autostop_duration           = FALSE;
 117   capture_opts->autostop_duration               = 60;               /* 1 min */
 118
 119
 120   capture_opts->fork_child                      = -1;               /* invalid process handle */
 121 #ifdef _WIN32
 122   capture_opts->signal_pipe_write_fd            = -1;
 123 #endif
 124   capture_opts->state                           = CAPTURE_STOPPED;
 125   capture_opts->output_to_pipe                  = FALSE;
 126 #ifndef _WIN32
 127   capture_opts->owner                           = getuid();
 128   capture_opts->group                           = getgid();
 129 #endif
 130 }
 131
 132
 133 /* log content of capture_opts */
 134 void
 135 capture_opts_log(const char *log_domain, GLogLevelFlags log_level, capture_options *capture_opts) {
 136     guint i;
 137
 138     g_log(log_domain, log_level, "CAPTURE OPTIONS     :");
 139     g_log(log_domain, log_level, "CFile               : %p", capture_opts->cf);
 140
 141     for (i = 0; i < capture_opts->ifaces->len; i++) {
 142         interface_options interface_opts;
 143
 144         interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
 145         g_log(log_domain, log_level, "Interface name[%02d]  : %s", i, interface_opts.name);
 146         g_log(log_domain, log_level, "Interface Descr[%02d] : %s", i, interface_opts.descr);
 147         g_log(log_domain, log_level, "Capture filter[%02d]  : %s", i, interface_opts.cfilter);
 148         g_log(log_domain, log_level, "Snap length[%02d] (%u) : %d", i, interface_opts.has_snaplen, interface_opts.snaplen);
 149         g_log(log_domain, log_level, "Link Type[%02d]       : %d", i, interface_opts.linktype);
 150         g_log(log_domain, log_level, "Promiscuous Mode[%02d]: %s", i, interface_opts.promisc_mode?"TRUE":"FALSE");
 151 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
 152         g_log(log_domain, log_level, "Buffer size[%02d]     : %d (MB)", i, interface_opts.buffer_size);
 153 #endif
 154         g_log(log_domain, log_level, "Monitor Mode[%02d]    : %s", i, interface_opts.monitor_mode?"TRUE":"FALSE");
 155 #ifdef HAVE_PCAP_REMOTE
 156         g_log(log_domain, log_level, "Capture source[%02d]  : %s", i,
 157             interface_opts.src_type == CAPTURE_IFLOCAL ? "Local interface" :
 158             interface_opts.src_type == CAPTURE_IFREMOTE ? "Remote interface" :
 159             "Unknown");
 160         if (interface_opts.src_type == CAPTURE_IFREMOTE) {
 161             g_log(log_domain, log_level, "Remote host[%02d]     : %s", i, interface_opts.remote_host);
 162             g_log(log_domain, log_level, "Remote port[%02d]     : %s", i, interface_opts.remote_port);
 163         }
 164         g_log(log_domain, log_level, "Authentication[%02d]  : %s", i,
 165             interface_opts.auth_type == CAPTURE_AUTH_NULL ? "Null" :
 166             interface_opts.auth_type == CAPTURE_AUTH_PWD ? "By username/password" :
 167             "Unknown");
 168         if (interface_opts.auth_type == CAPTURE_AUTH_PWD) {
 169             g_log(log_domain, log_level, "Auth username[%02d]   : %s", i, interface_opts.auth_username);
 170             g_log(log_domain, log_level, "Auth password[%02d]   : <hidden>", i);
 171         }
 172         g_log(log_domain, log_level, "UDP data tfer[%02d]   : %u", i, interface_opts.datatx_udp);
 173         g_log(log_domain, log_level, "No cap. RPCAP[%02d]   : %u", i, interface_opts.nocap_rpcap);
 174         g_log(log_domain, log_level, "No cap. local[%02d]   : %u", i, interface_opts.nocap_local);
 175 #endif
 176 #ifdef HAVE_PCAP_SETSAMPLING
 177         g_log(log_domain, log_level, "Sampling meth.[%02d]  : %d", i, interface_opts.sampling_method);
 178         g_log(log_domain, log_level, "Sampling param.[%02d] : %d", i, interface_opts.sampling_param);
 179 #endif
 180     }
 181     g_log(log_domain, log_level, "Interface name[df]  : %s", capture_opts->default_options.name);
 182     g_log(log_domain, log_level, "Interface Descr[df] : %s", capture_opts->default_options.descr);
 183     g_log(log_domain, log_level, "Capture filter[df]  : %s", capture_opts->default_options.cfilter);
 184     g_log(log_domain, log_level, "Snap length[df] (%u) : %d", capture_opts->default_options.has_snaplen, capture_opts->default_options.snaplen);
 185     g_log(log_domain, log_level, "Link Type[df]       : %d", capture_opts->default_options.linktype);
 186     g_log(log_domain, log_level, "Promiscuous Mode[df]: %s", capture_opts->default_options.promisc_mode?"TRUE":"FALSE");
 187 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
 188     g_log(log_domain, log_level, "Buffer size[df]     : %d (MB)", capture_opts->default_options.buffer_size);
 189 #endif
 190     g_log(log_domain, log_level, "Monitor Mode[df]    : %s", capture_opts->default_options.monitor_mode?"TRUE":"FALSE");
 191 #ifdef HAVE_PCAP_REMOTE
 192     g_log(log_domain, log_level, "Capture source[df]  : %s",
 193         capture_opts->default_options.src_type == CAPTURE_IFLOCAL ? "Local interface" :
 194         capture_opts->default_options.src_type == CAPTURE_IFREMOTE ? "Remote interface" :
 195         "Unknown");
 196     if (capture_opts->default_options.src_type == CAPTURE_IFREMOTE) {
 197         g_log(log_domain, log_level, "Remote host[df]     : %s", capture_opts->default_options.remote_host);
 198         g_log(log_domain, log_level, "Remote port[df]     : %s", capture_opts->default_options.remote_port);
 199     }
 200     g_log(log_domain, log_level, "Authentication[df]  : %s",
 201         capture_opts->default_options.auth_type == CAPTURE_AUTH_NULL ? "Null" :
 202         capture_opts->default_options.auth_type == CAPTURE_AUTH_PWD ? "By username/password" :
 203         "Unknown");
 204     if (capture_opts->default_options.auth_type == CAPTURE_AUTH_PWD) {
 205         g_log(log_domain, log_level, "Auth username[df]   : %s", capture_opts->default_options.auth_username);
 206         g_log(log_domain, log_level, "Auth password[df]   : <hidden>");
 207     }
 208     g_log(log_domain, log_level, "UDP data tfer[df]   : %u", capture_opts->default_options.datatx_udp);
 209     g_log(log_domain, log_level, "No cap. RPCAP[df]   : %u", capture_opts->default_options.nocap_rpcap);
 210     g_log(log_domain, log_level, "No cap. local[df]   : %u", capture_opts->default_options.nocap_local);
 211 #endif
 212 #ifdef HAVE_PCAP_SETSAMPLING
 213     g_log(log_domain, log_level, "Sampling meth. [df] : %d", capture_opts->default_options.sampling_method);
 214     g_log(log_domain, log_level, "Sampling param.[df] : %d", capture_opts->default_options.sampling_param);
 215 #endif
 216     g_log(log_domain, log_level, "SavingToFile        : %u", capture_opts->saving_to_file);
 217     g_log(log_domain, log_level, "SaveFile            : %s", (capture_opts->save_file) ? capture_opts->save_file : "");
 218     g_log(log_domain, log_level, "GroupReadAccess     : %u", capture_opts->group_read_access);
 219     g_log(log_domain, log_level, "Fileformat          : %s", (capture_opts->use_pcapng) ? "PCAPNG" : "PCAP");
 220     g_log(log_domain, log_level, "RealTimeMode        : %u", capture_opts->real_time_mode);
 221     g_log(log_domain, log_level, "ShowInfo            : %u", capture_opts->show_info);
 222     g_log(log_domain, log_level, "QuitAfterCap        : %u", capture_opts->quit_after_cap);
 223
 224     g_log(log_domain, log_level, "MultiFilesOn        : %u", capture_opts->multi_files_on);
 225     g_log(log_domain, log_level, "FileDuration    (%u) : %u", capture_opts->has_file_duration, capture_opts->file_duration);
 226     g_log(log_domain, log_level, "RingNumFiles    (%u) : %u", capture_opts->has_ring_num_files, capture_opts->ring_num_files);
 227
 228     g_log(log_domain, log_level, "AutostopFiles   (%u) : %u", capture_opts->has_autostop_files, capture_opts->autostop_files);
 229     g_log(log_domain, log_level, "AutostopPackets (%u) : %u", capture_opts->has_autostop_packets, capture_opts->autostop_packets);
 230     g_log(log_domain, log_level, "AutostopFilesize(%u) : %u (KB)", capture_opts->has_autostop_filesize, capture_opts->autostop_filesize);
 231     g_log(log_domain, log_level, "AutostopDuration(%u) : %u", capture_opts->has_autostop_duration, capture_opts->autostop_duration);
 232
 233     g_log(log_domain, log_level, "ForkChild           : %d", capture_opts->fork_child);
 234 #ifdef _WIN32
 235     g_log(log_domain, log_level, "SignalPipeWrite     : %d", capture_opts->signal_pipe_write_fd);
 236 #endif
 237 }
 238
 239 /*
 240  * Given a string of the form "<autostop criterion>:<value>", as might appear
 241  * as an argument to a "-a" option, parse it and set the criterion in
 242  * question.  Return an indication of whether it succeeded or failed
 243  * in some fashion.
 244  */
 245 static gboolean
 246 set_autostop_criterion(capture_options *capture_opts, const char *autostoparg)
 247 {
 248   gchar *p, *colonp;
 249
 250   colonp = strchr(autostoparg, ':');
 251   if (colonp == NULL)
 252     return FALSE;
 253
 254   p = colonp;
 255   *p++ = '\0';
 256
 257   /*
 258    * Skip over any white space (there probably won't be any, but
 259    * as we allow it in the preferences file, we might as well
 260    * allow it here).
 261    */
 262   while (isspace((guchar)*p))
 263     p++;
 264   if (*p == '\0') {
 265     /*
 266      * Put the colon back, so if our caller uses, in an
 267      * error message, the string they passed us, the message
 268      * looks correct.
 269      */
 270     *colonp = ':';
 271     return FALSE;
 272   }
 273   if (strcmp(autostoparg,"duration") == 0) {
 274     capture_opts->has_autostop_duration = TRUE;
 275     capture_opts->autostop_duration = get_positive_int(p,"autostop duration");
 276   } else if (strcmp(autostoparg,"filesize") == 0) {
 277     capture_opts->has_autostop_filesize = TRUE;
 278     capture_opts->autostop_filesize = get_positive_int(p,"autostop filesize");
 279   } else if (strcmp(autostoparg,"files") == 0) {
 280     capture_opts->multi_files_on = TRUE;
 281     capture_opts->has_autostop_files = TRUE;
 282     capture_opts->autostop_files = get_positive_int(p,"autostop files");
 283   } else {
 284     return FALSE;
 285   }
 286   *colonp = ':'; /* put the colon back */
 287   return TRUE;
 288 }
 289
 290 /*
 291  * Given a string of the form "<ring buffer file>:<duration>", as might appear
 292  * as an argument to a "-b" option, parse it and set the arguments in
 293  * question.  Return an indication of whether it succeeded or failed
 294  * in some fashion.
 295  */
 296 static gboolean
 297 get_ring_arguments(capture_options *capture_opts, const char *arg)
 298 {
 299   gchar *p = NULL, *colonp;
 300
 301   colonp = strchr(arg, ':');
 302   if (colonp == NULL)
 303     return FALSE;
 304
 305   p = colonp;
 306   *p++ = '\0';
 307
 308   /*
 309    * Skip over any white space (there probably won't be any, but
 310    * as we allow it in the preferences file, we might as well
 311    * allow it here).
 312    */
 313   while (isspace((guchar)*p))
 314     p++;
 315   if (*p == '\0') {
 316     /*
 317      * Put the colon back, so if our caller uses, in an
 318      * error message, the string they passed us, the message
 319      * looks correct.
 320      */
 321     *colonp = ':';
 322     return FALSE;
 323   }
 324
 325   if (strcmp(arg,"files") == 0) {
 326     capture_opts->has_ring_num_files = TRUE;
 327     capture_opts->ring_num_files = get_positive_int(p, "number of ring buffer files");
 328   } else if (strcmp(arg,"filesize") == 0) {
 329     capture_opts->has_autostop_filesize = TRUE;
 330     capture_opts->autostop_filesize = get_positive_int(p, "ring buffer filesize");
 331   } else if (strcmp(arg,"duration") == 0) {
 332     capture_opts->has_file_duration = TRUE;
 333     capture_opts->file_duration = get_positive_int(p, "ring buffer duration");
 334   }
 335
 336   *colonp = ':';    /* put the colon back */
 337   return TRUE;
 338 }
 339
 340 #ifdef HAVE_PCAP_SETSAMPLING
 341 /*
 342  * Given a string of the form "<sampling type>:<value>", as might appear
 343  * as an argument to a "-m" option, parse it and set the arguments in
 344  * question.  Return an indication of whether it succeeded or failed
 345  * in some fashion.
 346  */
 347 static gboolean
 348 get_sampling_arguments(capture_options *capture_opts, const char *arg)
 349 {
 350     gchar *p = NULL, *colonp;
 351
 352     colonp = strchr(arg, ':');
 353     if (colonp == NULL)
 354         return FALSE;
 355
 356     p = colonp;
 357     *p++ = '\0';
 358
 359     while (isspace((guchar)*p))
 360         p++;
 361     if (*p == '\0') {
 362         *colonp = ':';
 363         return FALSE;
 364     }
 365
 366     if (strcmp(arg, "count") == 0) {
 367         if (capture_opts->ifaces->len > 0) {
 368             interface_options interface_opts;
 369
 370             interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
 371             capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
 372             interface_opts.sampling_method = CAPTURE_SAMP_BY_COUNT;
 373             interface_opts.sampling_param = get_positive_int(p, "sampling count");
 374             g_array_append_val(capture_opts->ifaces, interface_opts);
 375         } else {
 376             capture_opts->default_options.sampling_method = CAPTURE_SAMP_BY_COUNT;
 377             capture_opts->default_options.sampling_param = get_positive_int(p, "sampling count");
 378         }
 379     } else if (strcmp(arg, "timer") == 0) {
 380         if (capture_opts->ifaces->len > 0) {
 381             interface_options interface_opts;
 382
 383             interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
 384             capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
 385             interface_opts.sampling_method = CAPTURE_SAMP_BY_TIMER;
 386             interface_opts.sampling_param = get_positive_int(p, "sampling timer");
 387             g_array_append_val(capture_opts->ifaces, interface_opts);
 388         } else {
 389             capture_opts->default_options.sampling_method = CAPTURE_SAMP_BY_TIMER;
 390             capture_opts->default_options.sampling_param = get_positive_int(p, "sampling timer");
 391         }
 392     }
 393     *colonp = ':';
 394     return TRUE;
 395 }
 396 #endif
 397
 398 #ifdef HAVE_PCAP_REMOTE
 399 /*
 400  * Given a string of the form "<username>:<password>", as might appear
 401  * as an argument to a "-A" option, parse it and set the arguments in
 402  * question.  Return an indication of whether it succeeded or failed
 403  * in some fashion.
 404  */
 405 static gboolean
 406 get_auth_arguments(capture_options *capture_opts, const char *arg)
 407 {
 408     gchar *p = NULL, *colonp;
 409
 410     colonp = strchr(arg, ':');
 411     if (colonp == NULL)
 412         return FALSE;
 413
 414     p = colonp;
 415     *p++ = '\0';
 416
 417     while (isspace((guchar)*p))
 418         p++;
 419
 420     if (capture_opts->ifaces->len > 0) {
 421         interface_options interface_opts;
 422
 423         interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
 424         capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
 425         interface_opts.auth_type = CAPTURE_AUTH_PWD;
 426         interface_opts.auth_username = g_strdup(arg);
 427         interface_opts.auth_password = g_strdup(p);
 428         g_array_append_val(capture_opts->ifaces, interface_opts);
 429     } else {
 430         capture_opts->default_options.auth_type = CAPTURE_AUTH_PWD;
 431         capture_opts->default_options.auth_username = g_strdup(arg);
 432         capture_opts->default_options.auth_password = g_strdup(p);
 433     }
 434     *colonp = ':';
 435     return TRUE;
 436 }
 437 #endif
 438
 439 static int
 440 capture_opts_add_iface_opt(capture_options *capture_opts, const char *optarg_str_p)
 441 {
 442     long        adapter_index;
 443     char        *p;
 444     GList       *if_list;
 445     if_info_t   *if_info;
 446     int         err;
 447     gchar       *err_str;
 448     interface_options interface_opts;
 449
 450
 451     /*
 452      * If the argument is a number, treat it as an index into the list
 453      * of adapters, as printed by "tshark -D".
 454      *
 455      * This should be OK on UNIX systems, as interfaces shouldn't have
 456      * names that begin with digits.  It can be useful on Windows, where
 457      * more than one interface can have the same name.
 458      */
 459     adapter_index = strtol(optarg_str_p, &p, 10);
 460     if (p != NULL && *p == '\0') {
 461         if (adapter_index < 0) {
 462             cmdarg_err("The specified adapter index is a negative number");
 463             return 1;
 464         }
 465         if (adapter_index > INT_MAX) {
 466             cmdarg_err("The specified adapter index is too large (greater than %d)",
 467                        INT_MAX);
 468             return 1;
 469         }
 470         if (adapter_index == 0) {
 471             cmdarg_err("There is no interface with that adapter index");
 472             return 1;
 473         }
 474         if_list = capture_interface_list(&err, &err_str);
 475         if (if_list == NULL) {
 476             switch (err) {
 477
 478             case CANT_GET_INTERFACE_LIST:
 479             case DONT_HAVE_PCAP:
 480                 cmdarg_err("%s", err_str);
 481                 g_free(err_str);
 482                 break;
 483
 484             case NO_INTERFACES_FOUND:
 485                 cmdarg_err("There are no interfaces on which a capture can be done");
 486                 break;
 487             }
 488             return 2;
 489         }
 490         if_info = (if_info_t *)g_list_nth_data(if_list, adapter_index - 1);
 491         if (if_info == NULL) {
 492             cmdarg_err("There is no interface with that adapter index");
 493             return 1;
 494         }
 495         interface_opts.name = g_strdup(if_info->name);
 496         /*  We don't set iface_descr here because doing so requires
 497          *  capture_ui_utils.c which requires epan/prefs.c which is
 498          *  probably a bit too much dependency for here...
 499          */
 500         free_interface_list(if_list);
 501     } else {
 502         interface_opts.name = g_strdup(optarg_str_p);
 503     }
 504     interface_opts.descr = g_strdup(capture_opts->default_options.descr);
 505     interface_opts.cfilter = g_strdup(capture_opts->default_options.cfilter);
 506     interface_opts.snaplen = capture_opts->default_options.snaplen;
 507     interface_opts.has_snaplen = capture_opts->default_options.has_snaplen;
 508     interface_opts.linktype = capture_opts->default_options.linktype;
 509     interface_opts.promisc_mode = capture_opts->default_options.promisc_mode;
 510 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
 511     interface_opts.buffer_size = capture_opts->default_options.buffer_size;
 512 #endif
 513     interface_opts.monitor_mode = capture_opts->default_options.monitor_mode;
 514 #ifdef HAVE_PCAP_REMOTE
 515     interface_opts.src_type = capture_opts->default_options.src_type;
 516     interface_opts.remote_host = g_strdup(capture_opts->default_options.remote_host);
 517     interface_opts.remote_port = g_strdup(capture_opts->default_options.remote_port);
 518     interface_opts.auth_type = capture_opts->default_options.auth_type;
 519     interface_opts.auth_username = g_strdup(capture_opts->default_options.auth_username);
 520     interface_opts.auth_password = g_strdup(capture_opts->default_options.auth_password);
 521     interface_opts.datatx_udp = capture_opts->default_options.datatx_udp;
 522     interface_opts.nocap_rpcap = capture_opts->default_options.nocap_rpcap;
 523     interface_opts.nocap_local = capture_opts->default_options.nocap_local;
 524 #endif
 525 #ifdef HAVE_PCAP_SETSAMPLING
 526     interface_opts.sampling_method = capture_opts->default_options.sampling_method;
 527     interface_opts.sampling_param  = capture_opts->default_options.sampling_param;
 528 #endif
 529
 530     g_array_append_val(capture_opts->ifaces, interface_opts);
 531
 532     return 0;
 533 }
 534
 535 int
 536 capture_opts_select_iface(capture_options *capture_opts, const char *optarg_str_p)
 537 {
 538     long        adapter_index;
 539     char        *p;
 540     GList       *if_list;
 541     if_info_t   *if_info;
 542     int         err;
 543     guint       i;
 544     gchar       *err_str, *name = NULL;
 545     interface_t device;
 546     gboolean    found = FALSE;
 547     interface_options interface_opts;
 548
 549     /*
 550      * If the argument is a number, treat it as an index into the list
 551      * of adapters, as printed by "tshark -D".
 552      *
 553      * This should be OK on UNIX systems, as interfaces shouldn't have
 554      * names that begin with digits.  It can be useful on Windows, where
 555      * more than one interface can have the same name.
 556      */
 557     adapter_index = strtol(optarg_str_p, &p, 10);
 558     if (p != NULL && *p == '\0') {
 559         if (adapter_index < 0) {
 560             cmdarg_err("The specified adapter index is a negative number");
 561             return 1;
 562         }
 563         if (adapter_index > INT_MAX) {
 564             cmdarg_err("The specified adapter index is too large (greater than %d)",
 565                        INT_MAX);
 566             return 1;
 567         }
 568         if (adapter_index == 0) {
 569             cmdarg_err("There is no interface with that adapter index");
 570             return 1;
 571         }
 572         if_list = capture_interface_list(&err, &err_str);
 573         if (if_list == NULL) {
 574             switch (err) {
 575
 576             case CANT_GET_INTERFACE_LIST:
 577                 cmdarg_err("%s", err_str);
 578                 g_free(err_str);
 579                 break;
 580
 581             case NO_INTERFACES_FOUND:
 582                 cmdarg_err("There are no interfaces on which a capture can be done");
 583                 break;
 584             }
 585             return 2;
 586         }
 587         if_info = (if_info_t *)g_list_nth_data(if_list, adapter_index - 1);
 588         if (if_info == NULL) {
 589             cmdarg_err("There is no interface with that adapter index");
 590             return 1;
 591         }
 592         name = g_strdup(if_info->name);
 593         /*  We don't set iface_descr here because doing so requires
 594          *  capture_ui_utils.c which requires epan/prefs.c which is
 595          *  probably a bit too much dependency for here...
 596          */
 597         free_interface_list(if_list);
 598     } else {
 599         name = g_strdup(optarg_str_p);
 600     }
 601     if (capture_opts->all_ifaces->len > 0) {
 602         for(i = 0; i < capture_opts->all_ifaces->len; i++) {
 603             device = g_array_index(capture_opts->all_ifaces, interface_t, i);
 604             if (strcmp(device.name, name) == 0) {
 605                 if (device.hidden) {
 606                     cmdarg_err("Interface %s is hidden. You can't capture on hidden interfaces.", name);
 607                     return 1;
 608                 }
 609                 device.selected = TRUE;
 610                 capture_opts->num_selected++;
 611                 capture_opts->all_ifaces = g_array_remove_index(capture_opts->all_ifaces, i);
 612                 g_array_insert_val(capture_opts->all_ifaces, i, device);
 613                 found = TRUE;
 614                 break;
 615             }
 616         }
 617         if (!found) {
 618             device.name         = g_strdup(name);
 619             device.display_name = g_strdup_printf("%s", device.name);
 620             device.hidden       = FALSE;
 621             device.selected     = TRUE;
 622             device.type         = IF_PIPE;
 623             device.pmode        = capture_opts->default_options.promisc_mode;
 624             device.has_snaplen  = capture_opts->default_options.has_snaplen;
 625             device.snaplen      = capture_opts->default_options.snaplen;
 626             device.cfilter      = g_strdup(capture_opts->default_options.cfilter);
 627             device.addresses    = NULL;
 628             device.no_addresses = 0;
 629             device.last_packets = 0;
 630             device.links        = NULL;
 631             device.active_dlt   = -1;
 632             device.local        = TRUE;
 633             device.locked       = FALSE;
 634 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
 635             device.buffer = 1;
 636             device.monitor_mode_enabled   = FALSE;
 637             device.monitor_mode_supported = FALSE;
 638 #endif
 639             g_array_append_val(capture_opts->all_ifaces, device);
 640             capture_opts->num_selected++;
 641         }
 642     } else {
 643         interface_opts.name = g_strdup(optarg_str_p);
 644         interface_opts.descr = g_strdup(capture_opts->default_options.descr);
 645         interface_opts.cfilter = g_strdup(capture_opts->default_options.cfilter);
 646         interface_opts.snaplen = capture_opts->default_options.snaplen;
 647         interface_opts.has_snaplen = capture_opts->default_options.has_snaplen;
 648         interface_opts.linktype = capture_opts->default_options.linktype;
 649         interface_opts.promisc_mode = capture_opts->default_options.promisc_mode;
 650 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
 651         interface_opts.buffer_size = capture_opts->default_options.buffer_size;
 652 #endif
 653         interface_opts.monitor_mode = capture_opts->default_options.monitor_mode;
 654 #ifdef HAVE_PCAP_REMOTE
 655         interface_opts.src_type = capture_opts->default_options.src_type;
 656         interface_opts.remote_host = g_strdup(capture_opts->default_options.remote_host);
 657         interface_opts.remote_port = g_strdup(capture_opts->default_options.remote_port);
 658         interface_opts.auth_type = capture_opts->default_options.auth_type;
 659         interface_opts.auth_username = g_strdup(capture_opts->default_options.auth_username);
 660         interface_opts.auth_password = g_strdup(capture_opts->default_options.auth_password);
 661         interface_opts.datatx_udp = capture_opts->default_options.datatx_udp;
 662         interface_opts.nocap_rpcap = capture_opts->default_options.nocap_rpcap;
 663         interface_opts.nocap_local = capture_opts->default_options.nocap_local;
 664 #endif
 665 #ifdef HAVE_PCAP_SETSAMPLING
 666         interface_opts.sampling_method = capture_opts->default_options.sampling_method;
 667         interface_opts.sampling_param  = capture_opts->default_options.sampling_param;
 668 #endif
 669         g_array_append_val(capture_opts->ifaces, interface_opts);
 670
 671         device.name         = g_strdup(name);
 672         device.display_name = g_strdup_printf("%s", device.name);
 673         device.hidden       = FALSE;
 674         device.selected     = TRUE;
 675         device.type         = IF_PIPE;
 676         device.pmode        = capture_opts->default_options.promisc_mode;
 677         device.has_snaplen  = capture_opts->default_options.has_snaplen;
 678         device.snaplen      = capture_opts->default_options.snaplen;
 679         device.cfilter      = g_strdup(capture_opts->default_options.cfilter);
 680         device.addresses    = NULL;
 681         device.no_addresses = 0;
 682         device.last_packets = 0;
 683         device.links        = NULL;
 684         device.active_dlt   = -1;
 685         device.local        = TRUE;
 686         device.locked       = FALSE;
 687 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
 688             device.buffer = 1;
 689         device.monitor_mode_enabled   = FALSE;
 690         device.monitor_mode_supported = FALSE;
 691 #endif
 692         g_array_append_val(capture_opts->all_ifaces, device);
 693         capture_opts->num_selected++;
 694     }
 695     return 0;
 696 }
 697
 698 int
 699 capture_opts_add_opt(capture_options *capture_opts, int opt, const char *optarg_str_p, gboolean *start_capture)
 700 {
 701     int status, snaplen;
 702
 703     switch(opt) {
 704     case 'a':        /* autostop criteria */
 705         if (set_autostop_criterion(capture_opts, optarg_str_p) == FALSE) {
 706             cmdarg_err("Invalid or unknown -a flag \"%s\"", optarg_str_p);
 707             return 1;
 708         }
 709         break;
 710 #ifdef HAVE_PCAP_REMOTE
 711     case 'A':
 712         if (get_auth_arguments(capture_opts, optarg_str_p) == FALSE) {
 713             cmdarg_err("Invalid or unknown -A arg \"%s\"", optarg_str_p);
 714             return 1;
 715         }
 716         break;
 717 #endif
 718     case 'b':        /* Ringbuffer option */
 719         capture_opts->multi_files_on = TRUE;
 720         if (get_ring_arguments(capture_opts, optarg_str_p) == FALSE) {
 721             cmdarg_err("Invalid or unknown -b arg \"%s\"", optarg_str_p);
 722             return 1;
 723         }
 724         break;
 725 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
 726     case 'B':        /* Buffer size */
 727         if (capture_opts->ifaces->len > 0) {
 728             interface_options interface_opts;
 729
 730             interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
 731             capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
 732             interface_opts.buffer_size = get_positive_int(optarg_str_p, "buffer size");
 733             g_array_append_val(capture_opts->ifaces, interface_opts);
 734         } else {
 735             capture_opts->default_options.buffer_size = get_positive_int(optarg_str_p, "buffer size");
 736         }
 737         break;
 738 #endif
 739     case 'c':        /* Capture n packets */
 740         capture_opts->has_autostop_packets = TRUE;
 741         capture_opts->autostop_packets = get_positive_int(optarg_str_p, "packet count");
 742         break;
 743     case 'f':        /* capture filter */
 744         if (capture_opts->ifaces->len > 0) {
 745             interface_options interface_opts;
 746
 747             interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
 748             capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
 749             g_free(interface_opts.cfilter);
 750             interface_opts.cfilter = g_strdup(optarg_str_p);
 751             g_array_append_val(capture_opts->ifaces, interface_opts);
 752         } else {
 753             g_free(capture_opts->default_options.cfilter);
 754             capture_opts->default_options.cfilter = g_strdup(optarg_str_p);
 755         }
 756         break;
 757     case 'H':        /* Hide capture info dialog box */
 758         capture_opts->show_info = FALSE;
 759         break;
 760     case 'i':        /* Use interface x */
 761         status = capture_opts_add_iface_opt(capture_opts, optarg_str_p);
 762         if (status != 0) {
 763             return status;
 764         }
 765         break;
 766 #ifdef HAVE_PCAP_CREATE
 767     case 'I':        /* Capture in monitor mode */
 768         if (capture_opts->ifaces->len > 0) {
 769             interface_options interface_opts;
 770
 771             interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
 772             capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
 773             interface_opts.monitor_mode = TRUE;
 774             g_array_append_val(capture_opts->ifaces, interface_opts);
 775         } else {
 776             capture_opts->default_options.monitor_mode = TRUE;
 777         }
 778         break;
 779 #endif
 780     case 'k':        /* Start capture immediately */
 781         *start_capture = TRUE;
 782         break;
 783     /*case 'l':*/    /* Automatic scrolling in live capture mode */
 784 #ifdef HAVE_PCAP_SETSAMPLING
 785     case 'm':
 786         if (get_sampling_arguments(capture_opts, optarg_str_p) == FALSE) {
 787             cmdarg_err("Invalid or unknown -m arg \"%s\"", optarg_str_p);
 788             return 1;
 789         }
 790         break;
 791 #endif
 792     case 'n':        /* Use pcapng format */
 793         capture_opts->use_pcapng = TRUE;
 794         break;
 795     case 'p':        /* Don't capture in promiscuous mode */
 796         if (capture_opts->ifaces->len > 0) {
 797             interface_options interface_opts;
 798
 799             interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
 800             capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
 801             interface_opts.promisc_mode = FALSE;
 802             g_array_append_val(capture_opts->ifaces, interface_opts);
 803         } else {
 804             capture_opts->default_options.promisc_mode = FALSE;
 805         }
 806         break;
 807     case 'P':        /* Use pcap format */
 808         capture_opts->use_pcapng = FALSE;
 809         break;
 810 #ifdef HAVE_PCAP_REMOTE
 811     case 'r':
 812         if (capture_opts->ifaces->len > 0) {
 813             interface_options interface_opts;
 814
 815             interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
 816             capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
 817             interface_opts.nocap_rpcap = FALSE;
 818             g_array_append_val(capture_opts->ifaces, interface_opts);
 819         } else {
 820             capture_opts->default_options.nocap_rpcap = FALSE;
 821         }
 822         break;
 823 #endif
 824     case 's':        /* Set the snapshot (capture) length */
 825         snaplen = get_natural_int(optarg_str_p, "snapshot length");
 826         /*
 827          * Make a snapshot length of 0 equivalent to the maximum packet
 828          * length, mirroring what tcpdump does.
 829          */
 830         if (snaplen == 0)
 831             snaplen = WTAP_MAX_PACKET_SIZE;
 832         if (capture_opts->ifaces->len > 0) {
 833             interface_options interface_opts;
 834
 835             interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
 836             capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
 837             interface_opts.has_snaplen = TRUE;
 838             interface_opts.snaplen = snaplen;
 839             g_array_append_val(capture_opts->ifaces, interface_opts);
 840         } else {
 841             capture_opts->default_options.snaplen = snaplen;
 842             capture_opts->default_options.has_snaplen = TRUE;
 843         }
 844         break;
 845     case 'S':        /* "Real-Time" mode: used for following file ala tail -f */
 846         capture_opts->real_time_mode = TRUE;
 847         break;
 848 #ifdef HAVE_PCAP_REMOTE
 849     case 'u':
 850         if (capture_opts->ifaces->len > 0) {
 851             interface_options interface_opts;
 852
 853             interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
 854             capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
 855             interface_opts.datatx_udp = TRUE;
 856             g_array_append_val(capture_opts->ifaces, interface_opts);
 857         } else {
 858             capture_opts->default_options.datatx_udp = TRUE;
 859         }
 860         break;
 861 #endif
 862     case 'w':        /* Write to capture file x */
 863         capture_opts->saving_to_file = TRUE;
 864         g_free(capture_opts->save_file);
 865         capture_opts->save_file = g_strdup(optarg_str_p);
 866         status = capture_opts_output_to_pipe(capture_opts->save_file, &capture_opts->output_to_pipe);
 867         return status;
 868     case 'g':        /* enable group read access on the capture file(s) */
 869         capture_opts->group_read_access = TRUE;
 870         break;
 871     case 'y':        /* Set the pcap data link type */
 872         if (capture_opts->ifaces->len > 0) {
 873             interface_options interface_opts;
 874
 875             interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
 876             capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
 877             interface_opts.linktype = linktype_name_to_val(optarg_str_p);
 878             if (interface_opts.linktype == -1) {
 879                 cmdarg_err("The specified data link type \"%s\" isn't valid",
 880                            optarg_str_p);
 881                 return 1;
 882             }
 883             g_array_append_val(capture_opts->ifaces, interface_opts);
 884         } else {
 885             capture_opts->default_options.linktype = linktype_name_to_val(optarg_str_p);
 886             if (capture_opts->default_options.linktype == -1) {
 887                 cmdarg_err("The specified data link type \"%s\" isn't valid",
 888                            optarg_str_p);
 889                 return 1;
 890             }
 891         }
 892         break;
 893     default:
 894         /* the caller is responsible to send us only the right opt's */
 895         g_assert_not_reached();
 896     }
 897
 898     return 0;
 899 }
 900
 901 void
 902 capture_opts_print_if_capabilities(if_capabilities_t *caps, char *name,
 903                                    gboolean monitor_mode)
 904 {
 905     GList *lt_entry;
 906     data_link_info_t *data_link_info;
 907
 908     if (caps->can_set_rfmon)
 909         fprintf_stderr("Data link types of interface %s when %sin monitor mode (use option -y to set):\n",
 910                        name, monitor_mode ? "" : "not ");
 911     else
 912         fprintf_stderr("Data link types of interface %s (use option -y to set):\n", name);
 913     for (lt_entry = caps->data_link_types; lt_entry != NULL;
 914          lt_entry = g_list_next(lt_entry)) {
 915         data_link_info = (data_link_info_t *)lt_entry->data;
 916         fprintf_stderr("  %s", data_link_info->name);
 917         if (data_link_info->description != NULL)
 918             fprintf_stderr(" (%s)", data_link_info->description);
 919         else
 920             fprintf_stderr(" (not supported)");
 921         fprintf_stderr("\n");
 922     }
 923 }
 924
 925 /* Print an ASCII-formatted list of interfaces. */
 926 void
 927 capture_opts_print_interfaces(GList *if_list)
 928 {
 929     int         i;
 930     GList       *if_entry;
 931     if_info_t   *if_info;
 932
 933     i = 1;  /* Interface id number */
 934     for (if_entry = g_list_first(if_list); if_entry != NULL;
 935          if_entry = g_list_next(if_entry)) {
 936         if_info = (if_info_t *)if_entry->data;
 937         fprintf_stderr("%d. %s", i++, if_info->name);
 938
 939         /* Print the description if it exists */
 940         if (if_info->description != NULL)
 941             fprintf_stderr(" (%s)", if_info->description);
 942         fprintf_stderr("\n");
 943     }
 944 }
 945
 946
 947 void capture_opts_trim_snaplen(capture_options *capture_opts, int snaplen_min)
 948 {
 949     guint i;
 950     interface_options interface_opts;
 951
 952     if (capture_opts->ifaces->len > 0) {
 953         for (i = 0; i < capture_opts->ifaces->len; i++) {
 954             interface_opts = g_array_index(capture_opts->ifaces, interface_options, 0);
 955             capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, 0);
 956             if (interface_opts.snaplen < 1)
 957                 interface_opts.snaplen = WTAP_MAX_PACKET_SIZE;
 958             else if (interface_opts.snaplen < snaplen_min)
 959                 interface_opts.snaplen = snaplen_min;
 960             g_array_append_val(capture_opts->ifaces, interface_opts);
 961         }
 962     } else {
 963         if (capture_opts->default_options.snaplen < 1)
 964             capture_opts->default_options.snaplen = WTAP_MAX_PACKET_SIZE;
 965         else if (capture_opts->default_options.snaplen < snaplen_min)
 966             capture_opts->default_options.snaplen = snaplen_min;
 967     }
 968 }
 969
 970
 971 void capture_opts_trim_ring_num_files(capture_options *capture_opts)
 972 {
 973     /* Check the value range of the ring_num_files parameter */
 974     if (capture_opts->ring_num_files > RINGBUFFER_MAX_NUM_FILES) {
 975         cmdarg_err("Too many ring buffer files (%u). Reducing to %u.\n", capture_opts->ring_num_files, RINGBUFFER_MAX_NUM_FILES);
 976         capture_opts->ring_num_files = RINGBUFFER_MAX_NUM_FILES;
 977     } else if (capture_opts->ring_num_files > RINGBUFFER_WARN_NUM_FILES) {
 978         cmdarg_err("%u is a lot of ring buffer files.\n", capture_opts->ring_num_files);
 979     }
 980 #if RINGBUFFER_MIN_NUM_FILES > 0
 981     else if (capture_opts->ring_num_files < RINGBUFFER_MIN_NUM_FILES)
 982         cmdarg_err("Too few ring buffer files (%u). Increasing to %u.\n", capture_opts->ring_num_files, RINGBUFFER_MIN_NUM_FILES);
 983         capture_opts->ring_num_files = RINGBUFFER_MIN_NUM_FILES;
 984 #endif
 985 }
 986
 987
 988 gboolean capture_opts_trim_iface(capture_options *capture_opts, const char *capture_device)
 989 {
 990     GList       *if_list;
 991     if_info_t   *if_info;
 992     int         err;
 993     gchar       *err_str;
 994     interface_options interface_opts;
 995
 996
 997     /* Did the user specify an interface to use? */
 998     if (capture_opts->num_selected == 0 && capture_opts->ifaces->len == 0) {
 999         /* No - is a default specified in the preferences file? */
1000         if (capture_device != NULL) {
1001             /* Yes - use it. */
1002             interface_opts.name = g_strdup(capture_device);
1003             /*  We don't set iface_descr here because doing so requires
1004              *  capture_ui_utils.c which requires epan/prefs.c which is
1005              *  probably a bit too much dependency for here...
1006              */
1007         } else {
1008             /* No - pick the first one from the list of interfaces. */
1009             if_list = capture_interface_list(&err, &err_str);
1010             if (if_list == NULL) {
1011                 switch (err) {
1012
1013                 case CANT_GET_INTERFACE_LIST:
1014                 case DONT_HAVE_PCAP:
1015                     cmdarg_err("%s", err_str);
1016                     g_free(err_str);
1017                     break;
1018
1019                 case NO_INTERFACES_FOUND:
1020                     cmdarg_err("There are no interfaces on which a capture can be done");
1021                     break;
1022                 }
1023                 return FALSE;
1024             }
1025             if_info = (if_info_t *)if_list->data;       /* first interface */
1026             interface_opts.name = g_strdup(if_info->name);
1027             /*  We don't set iface_descr here because doing so requires
1028              *  capture_ui_utils.c which requires epan/prefs.c which is
1029              *  probably a bit too much dependency for here...
1030              */
1031             free_interface_list(if_list);
1032         }
1033         if (capture_opts->default_options.descr) {
1034             interface_opts.descr = g_strdup(capture_opts->default_options.descr);
1035         } else {
1036             interface_opts.descr = NULL;
1037         }
1038         interface_opts.cfilter = g_strdup(capture_opts->default_options.cfilter);
1039         interface_opts.snaplen = capture_opts->default_options.snaplen;
1040         interface_opts.has_snaplen = capture_opts->default_options.has_snaplen;
1041         interface_opts.linktype = capture_opts->default_options.linktype;
1042         interface_opts.promisc_mode = capture_opts->default_options.promisc_mode;
1043 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1044         interface_opts.buffer_size = capture_opts->default_options.buffer_size;
1045 #endif
1046         interface_opts.monitor_mode = capture_opts->default_options.monitor_mode;
1047 #ifdef HAVE_PCAP_REMOTE
1048         interface_opts.src_type = capture_opts->default_options.src_type;
1049         interface_opts.remote_host = g_strdup(capture_opts->default_options.remote_host);
1050         interface_opts.remote_port = g_strdup(capture_opts->default_options.remote_port);
1051         interface_opts.auth_type = capture_opts->default_options.auth_type;
1052         interface_opts.auth_username = g_strdup(capture_opts->default_options.auth_username);
1053         interface_opts.auth_password = g_strdup(capture_opts->default_options.auth_password);
1054         interface_opts.datatx_udp = capture_opts->default_options.datatx_udp;
1055         interface_opts.nocap_rpcap = capture_opts->default_options.nocap_rpcap;
1056         interface_opts.nocap_local = capture_opts->default_options.nocap_local;
1057 #endif
1058 #ifdef HAVE_PCAP_SETSAMPLING
1059         interface_opts.sampling_method = capture_opts->default_options.sampling_method;
1060         interface_opts.sampling_param  = capture_opts->default_options.sampling_param;
1061 #endif
1062         g_array_append_val(capture_opts->ifaces, interface_opts);
1063     }
1064
1065     return TRUE;
1066 }
1067
1068
1069
1070 #ifndef S_IFIFO
1071 #define S_IFIFO _S_IFIFO
1072 #endif
1073 #ifndef S_ISFIFO
1074 #define S_ISFIFO(mode)  (((mode) & S_IFMT) == S_IFIFO)
1075 #endif
1076
1077 /* copied from filesystem.c */
1078 static int capture_opts_test_for_fifo(const char *path)
1079 {
1080   ws_statb64 statb;
1081
1082   if (ws_stat64(path, &statb) < 0)
1083     return errno;
1084
1085   if (S_ISFIFO(statb.st_mode))
1086     return ESPIPE;
1087   else
1088     return 0;
1089 }
1090
1091 static gboolean capture_opts_output_to_pipe(const char *save_file, gboolean *is_pipe)
1092 {
1093   int err;
1094
1095   *is_pipe = FALSE;
1096
1097   if (save_file != NULL) {
1098     /* We're writing to a capture file. */
1099     if (strcmp(save_file, "-") == 0) {
1100       /* Writing to stdout. */
1101       /* XXX - should we check whether it's a pipe?  It's arguably
1102          silly to do "-w - >output_file" rather than "-w output_file",
1103          but by not checking we might be violating the Principle Of
1104          Least Astonishment. */
1105       *is_pipe = TRUE;
1106     } else {
1107       /* not writing to stdout, test for a FIFO (aka named pipe) */
1108       err = capture_opts_test_for_fifo(save_file);
1109       switch (err) {
1110
1111       case ENOENT:      /* it doesn't exist, so we'll be creating it,
1112                            and it won't be a FIFO */
1113       case 0:           /* found it, but it's not a FIFO */
1114         break;
1115
1116       case ESPIPE:      /* it is a FIFO */
1117         *is_pipe = TRUE;
1118         break;
1119
1120       default:          /* couldn't stat it              */
1121         break;          /* ignore: later attempt to open */
1122                         /*  will generate a nice msg     */
1123       }
1124     }
1125   }
1126
1127   return 0;
1128 }
1129
1130 void
1131 collect_ifaces(capture_options *capture_opts)
1132 {
1133   guint i;
1134   interface_t device;
1135   interface_options interface_opts;
1136   for (i = 0; i < capture_opts->all_ifaces->len; i++) {
1137     device = g_array_index(capture_opts->all_ifaces, interface_t, i);
1138     if (!device.hidden && device.selected) {
1139       interface_opts.name = g_strdup(device.name);
1140       interface_opts.descr = g_strdup(device.display_name);
1141       interface_opts.monitor_mode = device.monitor_mode_enabled;
1142       interface_opts.linktype = device.active_dlt;
1143       interface_opts.cfilter = g_strdup(device.cfilter);
1144       interface_opts.snaplen = device.snaplen;
1145       interface_opts.has_snaplen = device.has_snaplen;
1146       interface_opts.promisc_mode = device.pmode;
1147 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1148       interface_opts.buffer_size =  device.buffer;
1149 #endif
1150       if (!device.local) {
1151 #ifdef HAVE_PCAP_REMOTE
1152         interface_opts.src_type = CAPTURE_IFREMOTE;
1153         interface_opts.remote_host = g_strdup(device.remote_opts.remote_host_opts.remote_host);
1154         interface_opts.remote_port = g_strdup(device.remote_opts.remote_host_opts.remote_port);
1155         interface_opts.auth_type = device.remote_opts.remote_host_opts.auth_type;
1156         interface_opts.auth_username = g_strdup(device.remote_opts.remote_host_opts.auth_username);
1157         interface_opts.auth_password = g_strdup(device.remote_opts.remote_host_opts.auth_password);
1158         interface_opts.datatx_udp = device.remote_opts.remote_host_opts.datatx_udp;
1159         interface_opts.nocap_rpcap = device.remote_opts.remote_host_opts.nocap_rpcap;
1160         interface_opts.nocap_local = device.remote_opts.remote_host_opts.nocap_local;
1161 #endif
1162 #ifdef HAVE_PCAP_SETSAMPLING
1163         interface_opts.sampling_method = device.remote_opts.sampling_method;
1164         interface_opts.sampling_param  = device.remote_opts.sampling_param;
1165 #endif
1166       }
1167       g_array_append_val(capture_opts->ifaces, interface_opts);
1168     } else {
1169       continue;
1170     }
1171   }
1172 }
1173
1174
1175 #endif /* HAVE_LIBPCAP */