capture_opts.c

   1 /* capture_opts.c
   2  * Routines for capture options setting
   3  *
   4  * Wireshark - Network traffic analyzer
   5  * By Gerald Combs <gerald@wireshark.org>
   6  * Copyright 1998 Gerald Combs
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * as published by the Free Software Foundation; either version 2
  11  * of the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22
  23 #include <config.h>
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27
  28 #ifdef HAVE_LIBPCAP
  29
  30 #include <string.h>
  31
  32 #ifdef HAVE_UNISTD_H
  33 #include <unistd.h>
  34 #endif
  35
  36 #include <glib.h>
  37
  38 #include <epan/packet.h>
  39 #include <epan/prefs.h>
  40
  41 #include "capture_opts.h"
  42 #include "ringbuffer.h"
  43
  44 #include <wsutil/clopts_common.h>
  45 #include <wsutil/cmdarg_err.h>
  46 #include <wsutil/file_util.h>
  47
  48 #include "caputils/capture_ifinfo.h"
  49 #include "caputils/capture-pcap-util.h"
  50
  51 static gboolean capture_opts_output_to_pipe(const char *save_file, gboolean *is_pipe);
  52
  53
  54 void
  55 capture_opts_init(capture_options *capture_opts)
  56 {
  57     capture_opts->ifaces                          = g_array_new(FALSE, FALSE, sizeof(interface_options));
  58     capture_opts->all_ifaces                      = g_array_new(FALSE, FALSE, sizeof(interface_t));
  59     capture_opts->num_selected                    = 0;
  60     capture_opts->default_options.name            = NULL;
  61     capture_opts->default_options.descr           = NULL;
  62     capture_opts->default_options.cfilter         = NULL;
  63     capture_opts->default_options.has_snaplen     = FALSE;
  64     capture_opts->default_options.snaplen         = WTAP_MAX_PACKET_SIZE;
  65     capture_opts->default_options.linktype        = -1; /* use interface default */
  66     capture_opts->default_options.promisc_mode    = TRUE;
  67     capture_opts->default_options.if_type         = IF_WIRED;
  68 #ifdef HAVE_EXTCAP
  69     capture_opts->default_options.extcap          = NULL;
  70     capture_opts->default_options.extcap_fifo     = NULL;
  71     capture_opts->default_options.extcap_args     = NULL;
  72     capture_opts->default_options.extcap_pid      = INVALID_EXTCAP_PID;
  73 #endif
  74 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
  75     capture_opts->default_options.buffer_size     = DEFAULT_CAPTURE_BUFFER_SIZE;
  76 #endif
  77     capture_opts->default_options.monitor_mode    = FALSE;
  78 #ifdef HAVE_PCAP_REMOTE
  79     capture_opts->default_options.src_type        = CAPTURE_IFLOCAL;
  80     capture_opts->default_options.remote_host     = NULL;
  81     capture_opts->default_options.remote_port     = NULL;
  82     capture_opts->default_options.auth_type       = CAPTURE_AUTH_NULL;
  83     capture_opts->default_options.auth_username   = NULL;
  84     capture_opts->default_options.auth_password   = NULL;
  85     capture_opts->default_options.datatx_udp      = FALSE;
  86     capture_opts->default_options.nocap_rpcap     = TRUE;
  87     capture_opts->default_options.nocap_local     = FALSE;
  88 #endif
  89 #ifdef HAVE_PCAP_SETSAMPLING
  90     capture_opts->default_options.sampling_method = CAPTURE_SAMP_NONE;
  91     capture_opts->default_options.sampling_param  = 0;
  92 #endif
  93     capture_opts->saving_to_file                  = FALSE;
  94     capture_opts->save_file                       = NULL;
  95     capture_opts->group_read_access               = FALSE;
  96 #ifdef PCAP_NG_DEFAULT
  97     capture_opts->use_pcapng                      = TRUE;             /* Save as pcap-ng by default */
  98 #else
  99     capture_opts->use_pcapng                      = FALSE;            /* Save as pcap by default */
 100 #endif
 101     capture_opts->real_time_mode                  = TRUE;
 102     capture_opts->show_info                       = TRUE;
 103     capture_opts->quit_after_cap                  = getenv("WIRESHARK_QUIT_AFTER_CAPTURE") ? TRUE : FALSE;
 104     capture_opts->restart                         = FALSE;
 105     capture_opts->orig_save_file                  = NULL;
 106
 107     capture_opts->multi_files_on                  = FALSE;
 108     capture_opts->has_file_duration               = FALSE;
 109     capture_opts->file_duration                   = 60;               /* 1 min */
 110     capture_opts->has_ring_num_files              = FALSE;
 111     capture_opts->ring_num_files                  = RINGBUFFER_MIN_NUM_FILES;
 112
 113     capture_opts->has_autostop_files              = FALSE;
 114     capture_opts->autostop_files                  = 1;
 115     capture_opts->has_autostop_packets            = FALSE;
 116     capture_opts->autostop_packets                = 0;
 117     capture_opts->has_autostop_filesize           = FALSE;
 118     capture_opts->autostop_filesize               = 1000;             /* 1 MB */
 119     capture_opts->has_autostop_duration           = FALSE;
 120     capture_opts->autostop_duration               = 60;               /* 1 min */
 121     capture_opts->capture_comment                 = NULL;
 122
 123     capture_opts->output_to_pipe                  = FALSE;
 124     capture_opts->capture_child                   = FALSE;
 125 }
 126
 127
 128 /* log content of capture_opts */
 129 void
 130 capture_opts_log(const char *log_domain, GLogLevelFlags log_level, capture_options *capture_opts) {
 131     guint i;
 132
 133     g_log(log_domain, log_level, "CAPTURE OPTIONS     :");
 134
 135     for (i = 0; i < capture_opts->ifaces->len; i++) {
 136         interface_options interface_opts;
 137
 138         interface_opts = g_array_index(capture_opts->ifaces, interface_options, i);
 139         g_log(log_domain, log_level, "Interface name[%02d]  : %s", i, interface_opts.name ? interface_opts.name : "(unspecified)");
 140         g_log(log_domain, log_level, "Interface description[%02d] : %s", i, interface_opts.descr ? interface_opts.descr : "(unspecified)");
 141         g_log(log_domain, log_level, "Console display name[%02d]: %s", i, interface_opts.console_display_name ? interface_opts.console_display_name : "(unspecified)");
 142         g_log(log_domain, log_level, "Capture filter[%02d]  : %s", i, interface_opts.cfilter ? interface_opts.cfilter : "(unspecified)");
 143         g_log(log_domain, log_level, "Snap length[%02d] (%u) : %d", i, interface_opts.has_snaplen, interface_opts.snaplen);
 144         g_log(log_domain, log_level, "Link Type[%02d]       : %d", i, interface_opts.linktype);
 145         g_log(log_domain, log_level, "Promiscuous Mode[%02d]: %s", i, interface_opts.promisc_mode?"TRUE":"FALSE");
 146 #ifdef HAVE_EXTCAP
 147         g_log(log_domain, log_level, "Extcap[%02d]          : %s", i, interface_opts.extcap ? interface_opts.extcap : "(unspecified)");
 148         g_log(log_domain, log_level, "Extcap FIFO[%02d]     : %s", i, interface_opts.extcap_fifo ? interface_opts.extcap_fifo : "(unspecified)");
 149         g_log(log_domain, log_level, "Extcap PID[%02d]      : %d", i, interface_opts.extcap_pid);
 150 #endif
 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 ? interface_opts.remote_host : "(unspecified)");
 162             g_log(log_domain, log_level, "Remote port[%02d]     : %s", i, interface_opts.remote_port ? interface_opts.remote_port : "(unspecified)");
 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 ? interface_opts.auth_username : "(unspecified)");
 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 ? capture_opts->default_options.name : "(unspecified)");
 182     g_log(log_domain, log_level, "Interface Descr[df] : %s", capture_opts->default_options.descr ? capture_opts->default_options.descr : "(unspecified)");
 183     g_log(log_domain, log_level, "Capture filter[df]  : %s", capture_opts->default_options.cfilter ? capture_opts->default_options.cfilter : "(unspecified)");
 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 #ifdef HAVE_EXTCAP
 188     g_log(log_domain, log_level, "Extcap[df]          : %s", capture_opts->default_options.extcap ? capture_opts->default_options.extcap : "(unspecified)");
 189     g_log(log_domain, log_level, "Extcap FIFO[df]     : %s", capture_opts->default_options.extcap_fifo ? capture_opts->default_options.extcap_fifo : "(unspecified)");
 190 #endif
 191 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
 192     g_log(log_domain, log_level, "Buffer size[df]     : %d (MB)", capture_opts->default_options.buffer_size);
 193 #endif
 194     g_log(log_domain, log_level, "Monitor Mode[df]    : %s", capture_opts->default_options.monitor_mode?"TRUE":"FALSE");
 195 #ifdef HAVE_PCAP_REMOTE
 196     g_log(log_domain, log_level, "Capture source[df]  : %s",
 197         capture_opts->default_options.src_type == CAPTURE_IFLOCAL ? "Local interface" :
 198         capture_opts->default_options.src_type == CAPTURE_IFREMOTE ? "Remote interface" :
 199         "Unknown");
 200     if (capture_opts->default_options.src_type == CAPTURE_IFREMOTE) {
 201         g_log(log_domain, log_level, "Remote host[df]     : %s", capture_opts->default_options.remote_host ? capture_opts->default_options.remote_host : "(unspecified)");
 202         g_log(log_domain, log_level, "Remote port[df]     : %s", capture_opts->default_options.remote_port ? capture_opts->default_options.remote_port : "(unspecified)");
 203     }
 204     g_log(log_domain, log_level, "Authentication[df]  : %s",
 205         capture_opts->default_options.auth_type == CAPTURE_AUTH_NULL ? "Null" :
 206         capture_opts->default_options.auth_type == CAPTURE_AUTH_PWD ? "By username/password" :
 207         "Unknown");
 208     if (capture_opts->default_options.auth_type == CAPTURE_AUTH_PWD) {
 209         g_log(log_domain, log_level, "Auth username[df]   : %s", capture_opts->default_options.auth_username ? capture_opts->default_options.auth_username : "(unspecified)");
 210         g_log(log_domain, log_level, "Auth password[df]   : <hidden>");
 211     }
 212     g_log(log_domain, log_level, "UDP data tfer[df]   : %u", capture_opts->default_options.datatx_udp);
 213     g_log(log_domain, log_level, "No cap. RPCAP[df]   : %u", capture_opts->default_options.nocap_rpcap);
 214     g_log(log_domain, log_level, "No cap. local[df]   : %u", capture_opts->default_options.nocap_local);
 215 #endif
 216 #ifdef HAVE_PCAP_SETSAMPLING
 217     g_log(log_domain, log_level, "Sampling meth. [df] : %d", capture_opts->default_options.sampling_method);
 218     g_log(log_domain, log_level, "Sampling param.[df] : %d", capture_opts->default_options.sampling_param);
 219 #endif
 220     g_log(log_domain, log_level, "SavingToFile        : %u", capture_opts->saving_to_file);
 221     g_log(log_domain, log_level, "SaveFile            : %s", (capture_opts->save_file) ? capture_opts->save_file : "");
 222     g_log(log_domain, log_level, "GroupReadAccess     : %u", capture_opts->group_read_access);
 223     g_log(log_domain, log_level, "Fileformat          : %s", (capture_opts->use_pcapng) ? "PCAPNG" : "PCAP");
 224     g_log(log_domain, log_level, "RealTimeMode        : %u", capture_opts->real_time_mode);
 225     g_log(log_domain, log_level, "ShowInfo            : %u", capture_opts->show_info);
 226     g_log(log_domain, log_level, "QuitAfterCap        : %u", capture_opts->quit_after_cap);
 227
 228     g_log(log_domain, log_level, "MultiFilesOn        : %u", capture_opts->multi_files_on);
 229     g_log(log_domain, log_level, "FileDuration    (%u) : %u", capture_opts->has_file_duration, capture_opts->file_duration);
 230     g_log(log_domain, log_level, "RingNumFiles    (%u) : %u", capture_opts->has_ring_num_files, capture_opts->ring_num_files);
 231
 232     g_log(log_domain, log_level, "AutostopFiles   (%u) : %u", capture_opts->has_autostop_files, capture_opts->autostop_files);
 233     g_log(log_domain, log_level, "AutostopPackets (%u) : %u", capture_opts->has_autostop_packets, capture_opts->autostop_packets);
 234     g_log(log_domain, log_level, "AutostopFilesize(%u) : %u (KB)", capture_opts->has_autostop_filesize, capture_opts->autostop_filesize);
 235     g_log(log_domain, log_level, "AutostopDuration(%u) : %u", capture_opts->has_autostop_duration, capture_opts->autostop_duration);
 236 }
 237
 238 /*
 239  * Given a string of the form "<autostop criterion>:<value>", as might appear
 240  * as an argument to a "-a" option, parse it and set the criterion in
 241  * question.  Return an indication of whether it succeeded or failed
 242  * in some fashion.
 243  */
 244 static gboolean
 245 set_autostop_criterion(capture_options *capture_opts, const char *autostoparg)
 246 {
 247     gchar *p, *colonp;
 248
 249     colonp = strchr(autostoparg, ':');
 250     if (colonp == NULL)
 251         return FALSE;
 252
 253     p = colonp;
 254     *p++ = '\0';
 255
 256     /*
 257      * Skip over any white space (there probably won't be any, but
 258      * as we allow it in the preferences file, we might as well
 259      * allow it here).
 260      */
 261     while (g_ascii_isspace(*p))
 262         p++;
 263     if (*p == '\0') {
 264         /*
 265          * Put the colon back, so if our caller uses, in an
 266          * error message, the string they passed us, the message
 267          * looks correct.
 268          */
 269         *colonp = ':';
 270         return FALSE;
 271     }
 272     if (strcmp(autostoparg,"duration") == 0) {
 273         capture_opts->has_autostop_duration = TRUE;
 274         capture_opts->autostop_duration = get_positive_int(p,"autostop duration");
 275     } else if (strcmp(autostoparg,"filesize") == 0) {
 276         capture_opts->has_autostop_filesize = TRUE;
 277         capture_opts->autostop_filesize = get_positive_int(p,"autostop filesize");
 278     } else if (strcmp(autostoparg,"files") == 0) {
 279         capture_opts->multi_files_on = TRUE;
 280         capture_opts->has_autostop_files = TRUE;
 281         capture_opts->autostop_files = get_positive_int(p,"autostop files");
 282     } else {
 283         return FALSE;
 284     }
 285     *colonp = ':'; /* put the colon back */
 286     return TRUE;
 287 }
 288
 289 /*
 290  * Given a string of the form "<ring buffer file>:<duration>", as might appear
 291  * as an argument to a "-b" option, parse it and set the arguments in
 292  * question.  Return an indication of whether it succeeded or failed
 293  * in some fashion.
 294  */
 295 static gboolean
 296 get_ring_arguments(capture_options *capture_opts, const char *arg)
 297 {
 298     gchar *p = NULL, *colonp;
 299
 300     colonp = strchr(arg, ':');
 301     if (colonp == NULL)
 302         return FALSE;
 303
 304     p = colonp;
 305     *p++ = '\0';
 306
 307     /*
 308      * Skip over any white space (there probably won't be any, but
 309      * as we allow it in the preferences file, we might as well
 310      * allow it here).
 311      */
 312     while (g_ascii_isspace(*p))
 313         p++;
 314     if (*p == '\0') {
 315         /*
 316          * Put the colon back, so if our caller uses, in an
 317          * error message, the string they passed us, the message
 318          * looks correct.
 319          */
 320         *colonp = ':';
 321         return FALSE;
 322     }
 323
 324     if (strcmp(arg,"files") == 0) {
 325         capture_opts->has_ring_num_files = TRUE;
 326         capture_opts->ring_num_files = get_positive_int(p, "number of ring buffer files");
 327     } else if (strcmp(arg,"filesize") == 0) {
 328         capture_opts->has_autostop_filesize = TRUE;
 329         capture_opts->autostop_filesize = get_positive_int(p, "ring buffer filesize");
 330     } else if (strcmp(arg,"duration") == 0) {
 331         capture_opts->has_file_duration = TRUE;
 332         capture_opts->file_duration = get_positive_int(p, "ring buffer duration");
 333     }
 334
 335     *colonp = ':';    /* put the colon back */
 336     return TRUE;
 337 }
 338
 339 #ifdef HAVE_PCAP_SETSAMPLING
 340 /*
 341  * Given a string of the form "<sampling type>:<value>", as might appear
 342  * as an argument to a "-m" option, parse it and set the arguments in
 343  * question.  Return an indication of whether it succeeded or failed
 344  * in some fashion.
 345  */
 346 static gboolean
 347 get_sampling_arguments(capture_options *capture_opts, const char *arg)
 348 {
 349     gchar *p = NULL, *colonp;
 350
 351     colonp = strchr(arg, ':');
 352     if (colonp == NULL)
 353         return FALSE;
 354
 355     p = colonp;
 356     *p++ = '\0';
 357
 358     while (g_ascii_isspace(*p))
 359         p++;
 360     if (*p == '\0') {
 361         *colonp = ':';
 362         return FALSE;
 363     }
 364
 365     if (strcmp(arg, "count") == 0) {
 366         if (capture_opts->ifaces->len > 0) {
 367             interface_options interface_opts;
 368
 369             interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
 370             capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
 371             interface_opts.sampling_method = CAPTURE_SAMP_BY_COUNT;
 372             interface_opts.sampling_param = get_positive_int(p, "sampling count");
 373             g_array_append_val(capture_opts->ifaces, interface_opts);
 374         } else {
 375             capture_opts->default_options.sampling_method = CAPTURE_SAMP_BY_COUNT;
 376             capture_opts->default_options.sampling_param = get_positive_int(p, "sampling count");
 377         }
 378     } else if (strcmp(arg, "timer") == 0) {
 379         if (capture_opts->ifaces->len > 0) {
 380             interface_options interface_opts;
 381
 382             interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
 383             capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
 384             interface_opts.sampling_method = CAPTURE_SAMP_BY_TIMER;
 385             interface_opts.sampling_param = get_positive_int(p, "sampling timer");
 386             g_array_append_val(capture_opts->ifaces, interface_opts);
 387         } else {
 388             capture_opts->default_options.sampling_method = CAPTURE_SAMP_BY_TIMER;
 389             capture_opts->default_options.sampling_param = get_positive_int(p, "sampling timer");
 390         }
 391     }
 392     *colonp = ':';
 393     return TRUE;
 394 }
 395 #endif
 396
 397 #ifdef HAVE_PCAP_REMOTE
 398 /*
 399  * Given a string of the form "<username>:<password>", as might appear
 400  * as an argument to a "-A" option, parse it and set the arguments in
 401  * question.  Return an indication of whether it succeeded or failed
 402  * in some fashion.
 403  */
 404 static gboolean
 405 get_auth_arguments(capture_options *capture_opts, const char *arg)
 406 {
 407     gchar *p = NULL, *colonp;
 408
 409     colonp = strchr(arg, ':');
 410     if (colonp == NULL)
 411         return FALSE;
 412
 413     p = colonp;
 414     *p++ = '\0';
 415
 416     while (g_ascii_isspace(*p))
 417         p++;
 418
 419     if (capture_opts->ifaces->len > 0) {
 420         interface_options interface_opts;
 421
 422         interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
 423         capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
 424         interface_opts.auth_type = CAPTURE_AUTH_PWD;
 425         interface_opts.auth_username = g_strdup(arg);
 426         interface_opts.auth_password = g_strdup(p);
 427         g_array_append_val(capture_opts->ifaces, interface_opts);
 428     } else {
 429         capture_opts->default_options.auth_type = CAPTURE_AUTH_PWD;
 430         capture_opts->default_options.auth_username = g_strdup(arg);
 431         capture_opts->default_options.auth_password = g_strdup(p);
 432     }
 433     *colonp = ':';
 434     return TRUE;
 435 }
 436 #endif
 437
 438 static int
 439 capture_opts_add_iface_opt(capture_options *capture_opts, const char *optarg_str_p)
 440 {
 441     long        adapter_index;
 442     char        *p;
 443     GList       *if_list;
 444     if_info_t   *if_info;
 445     int         err;
 446     gchar       *err_str;
 447     interface_options interface_opts;
 448
 449     /*
 450      * If the argument is a number, treat it as an index into the list
 451      * of adapters, as printed by "tshark -D".
 452      *
 453      * This should be OK on UNIX systems, as interfaces shouldn't have
 454      * names that begin with digits.  It can be useful on Windows, where
 455      * more than one interface can have the same name.
 456      */
 457     adapter_index = strtol(optarg_str_p, &p, 10);
 458     if (p != NULL && *p == '\0') {
 459         if (adapter_index < 0) {
 460             cmdarg_err("The specified adapter index is a negative number");
 461             return 1;
 462         }
 463         if (adapter_index > INT_MAX) {
 464             cmdarg_err("The specified adapter index is too large (greater than %d)",
 465                        INT_MAX);
 466             return 1;
 467         }
 468         if (adapter_index == 0) {
 469             cmdarg_err("There is no interface with that adapter index");
 470             return 1;
 471         }
 472         if_list = capture_interface_list(&err, &err_str, NULL);
 473         if (if_list == NULL) {
 474             if (err == 0)
 475                 cmdarg_err("There are no interfaces on which a capture can be done");
 476             else {
 477                 cmdarg_err("%s", err_str);
 478                 g_free(err_str);
 479             }
 480             return 2;
 481         }
 482         if_info = (if_info_t *)g_list_nth_data(if_list, (int)(adapter_index - 1));
 483         if (if_info == NULL) {
 484             cmdarg_err("There is no interface with that adapter index");
 485             return 1;
 486         }
 487         interface_opts.name = g_strdup(if_info->name);
 488         if (if_info->friendly_name != NULL) {
 489             /*
 490              * We have a friendly name for the interface, so display that
 491              * instead of the interface name/guid.
 492              *
 493              * XXX - on UN*X, the interface name is not quite so ugly,
 494              * and might be more familiar to users; display them both?
 495              */
 496             interface_opts.console_display_name = g_strdup(if_info->friendly_name);
 497         } else {
 498             /* fallback to the interface name */
 499             interface_opts.console_display_name = g_strdup(if_info->name);
 500         }
 501         free_interface_list(if_list);
 502     } else if (capture_opts->capture_child) {
 503         /* In Wireshark capture child mode, thus proper device name is supplied. */
 504         /* No need for trying to match it for friendly names. */
 505         interface_opts.name = g_strdup(optarg_str_p);
 506         interface_opts.console_display_name = g_strdup(optarg_str_p);
 507     } else {
 508         /*
 509          * Retrieve the interface list so that we can search for the
 510          * specified option amongst both the interface names and the
 511          * friendly names and so that we find the friendly name even
 512          * if an interface name was specified.
 513          *
 514          * If we can't get the list, just use the specified option as
 515          * the interface name, so that the user can try specifying an
 516          * interface explicitly for testing purposes.
 517          */
 518         if_list = capture_interface_list(&err, NULL, NULL);
 519         if (if_list != NULL) {
 520             /* try and do an exact match (case insensitive) */
 521             GList   *if_entry;
 522             gboolean matched;
 523
 524             matched = FALSE;
 525             for (if_entry = g_list_first(if_list); if_entry != NULL;
 526                  if_entry = g_list_next(if_entry))
 527             {
 528                 if_info = (if_info_t *)if_entry->data;
 529                 /* exact name check */
 530                 if (g_ascii_strcasecmp(if_info->name, optarg_str_p) == 0) {
 531                     /* exact match on the interface name, use that for displaying etc */
 532                     interface_opts.name = g_strdup(if_info->name);
 533
 534                     if (if_info->friendly_name != NULL) {
 535                         /*
 536                          * If we have a friendly name, use that for the
 537                          * console display name, as it is the basis for
 538                          * the auto generated temp filename.
 539                          */
 540                         interface_opts.console_display_name = g_strdup(if_info->friendly_name);
 541                     } else {
 542                         interface_opts.console_display_name = g_strdup(if_info->name);
 543                     }
 544                     matched = TRUE;
 545                     break;
 546                 }
 547
 548                 /* exact friendly name check */
 549                 if (if_info->friendly_name != NULL &&
 550                     g_ascii_strcasecmp(if_info->friendly_name, optarg_str_p) == 0) {
 551                     /* exact match - use the friendly name for display */
 552                     interface_opts.name = g_strdup(if_info->name);
 553                     interface_opts.console_display_name = g_strdup(if_info->friendly_name);
 554                     matched = TRUE;
 555                     break;
 556                 }
 557             }
 558
 559             /* didn't find, attempt a case insensitive prefix match of the friendly name*/
 560             if (!matched) {
 561                 size_t prefix_length;
 562
 563                 prefix_length = strlen(optarg_str_p);
 564                 for (if_entry = g_list_first(if_list); if_entry != NULL;
 565                      if_entry = g_list_next(if_entry))
 566                 {
 567                     if_info = (if_info_t *)if_entry->data;
 568
 569                     if (if_info->friendly_name != NULL &&
 570                         g_ascii_strncasecmp(if_info->friendly_name, optarg_str_p, prefix_length) == 0) {
 571                         /* prefix match - use the friendly name for display */
 572                         interface_opts.name = g_strdup(if_info->name);
 573                         interface_opts.console_display_name = g_strdup(if_info->friendly_name);
 574                         matched = TRUE;
 575                         break;
 576                     }
 577                 }
 578             }
 579             if (!matched) {
 580                 /*
 581                  * We didn't find the interface in the list; just use
 582                  * the specified name, so that, for example, if an
 583                  * interface doesn't show up in the list for some
 584                  * reason, the user can try specifying it explicitly
 585                  * for testing purposes.
 586                  */
 587                 interface_opts.name = g_strdup(optarg_str_p);
 588                 interface_opts.console_display_name = g_strdup(optarg_str_p);
 589             }
 590             free_interface_list(if_list);
 591         } else {
 592             interface_opts.name = g_strdup(optarg_str_p);
 593             interface_opts.console_display_name = g_strdup(optarg_str_p);
 594         }
 595     }
 596
 597     /*  We don't set iface_descr here because doing so requires
 598      *  capture_ui_utils.c which requires epan/prefs.c which is
 599      *  probably a bit too much dependency for here...
 600      */
 601     interface_opts.descr = g_strdup(capture_opts->default_options.descr);
 602     interface_opts.cfilter = g_strdup(capture_opts->default_options.cfilter);
 603     interface_opts.snaplen = capture_opts->default_options.snaplen;
 604     interface_opts.has_snaplen = capture_opts->default_options.has_snaplen;
 605     interface_opts.linktype = capture_opts->default_options.linktype;
 606     interface_opts.promisc_mode = capture_opts->default_options.promisc_mode;
 607     interface_opts.if_type = capture_opts->default_options.if_type;
 608 #ifdef HAVE_EXTCAP
 609     interface_opts.extcap = g_strdup(capture_opts->default_options.extcap);
 610     interface_opts.extcap_fifo = g_strdup(capture_opts->default_options.extcap_fifo);
 611     interface_opts.extcap_args = NULL;
 612     interface_opts.extcap_pid = INVALID_EXTCAP_PID;
 613 #endif
 614 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
 615     interface_opts.buffer_size = capture_opts->default_options.buffer_size;
 616 #endif
 617     interface_opts.monitor_mode = capture_opts->default_options.monitor_mode;
 618 #ifdef HAVE_PCAP_REMOTE
 619     interface_opts.src_type = capture_opts->default_options.src_type;
 620     interface_opts.remote_host = g_strdup(capture_opts->default_options.remote_host);
 621     interface_opts.remote_port = g_strdup(capture_opts->default_options.remote_port);
 622     interface_opts.auth_type = capture_opts->default_options.auth_type;
 623     interface_opts.auth_username = g_strdup(capture_opts->default_options.auth_username);
 624     interface_opts.auth_password = g_strdup(capture_opts->default_options.auth_password);
 625     interface_opts.datatx_udp = capture_opts->default_options.datatx_udp;
 626     interface_opts.nocap_rpcap = capture_opts->default_options.nocap_rpcap;
 627     interface_opts.nocap_local = capture_opts->default_options.nocap_local;
 628 #endif
 629 #ifdef HAVE_PCAP_SETSAMPLING
 630     interface_opts.sampling_method = capture_opts->default_options.sampling_method;
 631     interface_opts.sampling_param  = capture_opts->default_options.sampling_param;
 632 #endif
 633
 634     g_array_append_val(capture_opts->ifaces, interface_opts);
 635
 636     return 0;
 637 }
 638
 639
 640 int
 641 capture_opts_add_opt(capture_options *capture_opts, int opt, const char *optarg_str_p, gboolean *start_capture)
 642 {
 643     int status, snaplen;
 644
 645     switch(opt) {
 646     case LONGOPT_NUM_CAP_COMMENT:  /* capture comment */
 647         if (capture_opts->capture_comment) {
 648             cmdarg_err("--capture-comment can be set only once per file");
 649             return 1;
 650         }
 651         capture_opts->capture_comment = g_strdup(optarg_str_p);
 652         break;
 653     case 'a':        /* autostop criteria */
 654         if (set_autostop_criterion(capture_opts, optarg_str_p) == FALSE) {
 655             cmdarg_err("Invalid or unknown -a flag \"%s\"", optarg_str_p);
 656             return 1;
 657         }
 658         break;
 659 #ifdef HAVE_PCAP_REMOTE
 660     case 'A':
 661         if (get_auth_arguments(capture_opts, optarg_str_p) == FALSE) {
 662             cmdarg_err("Invalid or unknown -A arg \"%s\"", optarg_str_p);
 663             return 1;
 664         }
 665         break;
 666 #endif
 667     case 'b':        /* Ringbuffer option */
 668         capture_opts->multi_files_on = TRUE;
 669         if (get_ring_arguments(capture_opts, optarg_str_p) == FALSE) {
 670             cmdarg_err("Invalid or unknown -b arg \"%s\"", optarg_str_p);
 671             return 1;
 672         }
 673         break;
 674 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
 675     case 'B':        /* Buffer size */
 676         if (capture_opts->ifaces->len > 0) {
 677             interface_options interface_opts;
 678
 679             interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
 680             capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
 681             interface_opts.buffer_size = get_positive_int(optarg_str_p, "buffer size");
 682             g_array_append_val(capture_opts->ifaces, interface_opts);
 683         } else {
 684             capture_opts->default_options.buffer_size = get_positive_int(optarg_str_p, "buffer size");
 685         }
 686         break;
 687 #endif
 688     case 'c':        /* Capture n packets */
 689         capture_opts->has_autostop_packets = TRUE;
 690         capture_opts->autostop_packets = get_positive_int(optarg_str_p, "packet count");
 691         break;
 692     case 'f':        /* capture filter */
 693         if (capture_opts->ifaces->len > 0) {
 694             interface_options interface_opts;
 695
 696             interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
 697             capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
 698             g_free(interface_opts.cfilter);
 699             interface_opts.cfilter = g_strdup(optarg_str_p);
 700             g_array_append_val(capture_opts->ifaces, interface_opts);
 701         } else {
 702             g_free(capture_opts->default_options.cfilter);
 703             capture_opts->default_options.cfilter = g_strdup(optarg_str_p);
 704         }
 705         break;
 706     case 'g':        /* enable group read access on the capture file(s) */
 707         capture_opts->group_read_access = TRUE;
 708         break;
 709     case 'H':        /* Hide capture info dialog box */
 710         capture_opts->show_info = FALSE;
 711         break;
 712     case 'i':        /* Use interface x */
 713         status = capture_opts_add_iface_opt(capture_opts, optarg_str_p);
 714         if (status != 0) {
 715             return status;
 716         }
 717         break;
 718 #ifdef HAVE_PCAP_CREATE
 719     case 'I':        /* Capture in monitor mode */
 720         if (capture_opts->ifaces->len > 0) {
 721             interface_options interface_opts;
 722
 723             interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
 724             capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
 725             interface_opts.monitor_mode = TRUE;
 726             g_array_append_val(capture_opts->ifaces, interface_opts);
 727         } else {
 728             capture_opts->default_options.monitor_mode = TRUE;
 729         }
 730         break;
 731 #endif
 732     case 'k':        /* Start capture immediately */
 733         *start_capture = TRUE;
 734         break;
 735     /*case 'l':*/    /* Automatic scrolling in live capture mode */
 736 #ifdef HAVE_PCAP_SETSAMPLING
 737     case 'm':
 738         if (get_sampling_arguments(capture_opts, optarg_str_p) == FALSE) {
 739             cmdarg_err("Invalid or unknown -m arg \"%s\"", optarg_str_p);
 740             return 1;
 741         }
 742         break;
 743 #endif
 744     case 'n':        /* Use pcapng format */
 745         capture_opts->use_pcapng = TRUE;
 746         break;
 747     case 'p':        /* Don't capture in promiscuous mode */
 748         if (capture_opts->ifaces->len > 0) {
 749             interface_options interface_opts;
 750
 751             interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
 752             capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
 753             interface_opts.promisc_mode = FALSE;
 754             g_array_append_val(capture_opts->ifaces, interface_opts);
 755         } else {
 756             capture_opts->default_options.promisc_mode = FALSE;
 757         }
 758         break;
 759     case 'P':        /* Use pcap format */
 760         capture_opts->use_pcapng = FALSE;
 761         break;
 762 #ifdef HAVE_PCAP_REMOTE
 763     case 'r':
 764         if (capture_opts->ifaces->len > 0) {
 765             interface_options interface_opts;
 766
 767             interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
 768             capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
 769             interface_opts.nocap_rpcap = FALSE;
 770             g_array_append_val(capture_opts->ifaces, interface_opts);
 771         } else {
 772             capture_opts->default_options.nocap_rpcap = FALSE;
 773         }
 774         break;
 775 #endif
 776     case 's':        /* Set the snapshot (capture) length */
 777         snaplen = get_natural_int(optarg_str_p, "snapshot length");
 778         /*
 779          * Make a snapshot length of 0 equivalent to the maximum packet
 780          * length, mirroring what tcpdump does.
 781          */
 782         if (snaplen == 0)
 783             snaplen = WTAP_MAX_PACKET_SIZE;
 784         if (capture_opts->ifaces->len > 0) {
 785             interface_options interface_opts;
 786
 787             interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
 788             capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
 789             interface_opts.has_snaplen = TRUE;
 790             interface_opts.snaplen = snaplen;
 791             g_array_append_val(capture_opts->ifaces, interface_opts);
 792         } else {
 793             capture_opts->default_options.snaplen = snaplen;
 794             capture_opts->default_options.has_snaplen = TRUE;
 795         }
 796         break;
 797     case 'S':        /* "Real-Time" mode: used for following file ala tail -f */
 798         capture_opts->real_time_mode = TRUE;
 799         break;
 800 #ifdef HAVE_PCAP_REMOTE
 801     case 'u':
 802         if (capture_opts->ifaces->len > 0) {
 803             interface_options interface_opts;
 804
 805             interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
 806             capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
 807             interface_opts.datatx_udp = TRUE;
 808             g_array_append_val(capture_opts->ifaces, interface_opts);
 809         } else {
 810             capture_opts->default_options.datatx_udp = TRUE;
 811         }
 812         break;
 813 #endif
 814     case 'w':        /* Write to capture file x */
 815         capture_opts->saving_to_file = TRUE;
 816         g_free(capture_opts->save_file);
 817         capture_opts->save_file = g_strdup(optarg_str_p);
 818         status = capture_opts_output_to_pipe(capture_opts->save_file, &capture_opts->output_to_pipe);
 819         return status;
 820     case 'y':        /* Set the pcap data link type */
 821         if (capture_opts->ifaces->len > 0) {
 822             interface_options interface_opts;
 823
 824             interface_opts = g_array_index(capture_opts->ifaces, interface_options, capture_opts->ifaces->len - 1);
 825             capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, capture_opts->ifaces->len - 1);
 826             interface_opts.linktype = linktype_name_to_val(optarg_str_p);
 827             if (interface_opts.linktype == -1) {
 828                 cmdarg_err("The specified data link type \"%s\" isn't valid",
 829                            optarg_str_p);
 830                 return 1;
 831             }
 832             g_array_append_val(capture_opts->ifaces, interface_opts);
 833         } else {
 834             capture_opts->default_options.linktype = linktype_name_to_val(optarg_str_p);
 835             if (capture_opts->default_options.linktype == -1) {
 836                 cmdarg_err("The specified data link type \"%s\" isn't valid",
 837                            optarg_str_p);
 838                 return 1;
 839             }
 840         }
 841         break;
 842     default:
 843         /* the caller is responsible to send us only the right opt's */
 844         g_assert_not_reached();
 845     }
 846
 847     return 0;
 848 }
 849
 850 void
 851 capture_opts_print_if_capabilities(if_capabilities_t *caps, char *name,
 852                                    gboolean monitor_mode)
 853 {
 854     GList *lt_entry;
 855     data_link_info_t *data_link_info;
 856
 857     if (caps->can_set_rfmon)
 858         printf("Data link types of interface %s when %sin monitor mode (use option -y to set):\n",
 859                name, monitor_mode ? "" : "not ");
 860     else
 861         printf("Data link types of interface %s (use option -y to set):\n", name);
 862     for (lt_entry = caps->data_link_types; lt_entry != NULL;
 863          lt_entry = g_list_next(lt_entry)) {
 864         data_link_info = (data_link_info_t *)lt_entry->data;
 865         printf("  %s", data_link_info->name);
 866         if (data_link_info->description != NULL)
 867             printf(" (%s)", data_link_info->description);
 868         else
 869             printf(" (not supported)");
 870         printf("\n");
 871     }
 872 }
 873
 874 /* Print an ASCII-formatted list of interfaces. */
 875 void
 876 capture_opts_print_interfaces(GList *if_list)
 877 {
 878     int         i;
 879     GList       *if_entry;
 880     if_info_t   *if_info;
 881
 882     i = 1;  /* Interface id number */
 883     for (if_entry = g_list_first(if_list); if_entry != NULL;
 884          if_entry = g_list_next(if_entry)) {
 885         if_info = (if_info_t *)if_entry->data;
 886         printf("%d. %s", i++, if_info->name);
 887
 888         /* Print the interface friendly name, if it exists;
 889           if not fall back to vendor description, if it exists. */
 890         if (if_info->friendly_name != NULL){
 891             printf(" (%s)", if_info->friendly_name);
 892         } else {
 893             if (if_info->vendor_description != NULL)
 894                 printf(" (%s)", if_info->vendor_description);
 895         }
 896         printf("\n");
 897     }
 898 }
 899
 900
 901 void
 902 capture_opts_trim_snaplen(capture_options *capture_opts, int snaplen_min)
 903 {
 904     guint i;
 905     interface_options interface_opts;
 906
 907     if (capture_opts->ifaces->len > 0) {
 908         for (i = 0; i < capture_opts->ifaces->len; i++) {
 909             interface_opts = g_array_index(capture_opts->ifaces, interface_options, 0);
 910             capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, 0);
 911             if (interface_opts.snaplen < 1)
 912                 interface_opts.snaplen = WTAP_MAX_PACKET_SIZE;
 913             else if (interface_opts.snaplen < snaplen_min)
 914                 interface_opts.snaplen = snaplen_min;
 915             g_array_append_val(capture_opts->ifaces, interface_opts);
 916         }
 917     } else {
 918         if (capture_opts->default_options.snaplen < 1)
 919             capture_opts->default_options.snaplen = WTAP_MAX_PACKET_SIZE;
 920         else if (capture_opts->default_options.snaplen < snaplen_min)
 921             capture_opts->default_options.snaplen = snaplen_min;
 922     }
 923 }
 924
 925
 926 void
 927 capture_opts_trim_ring_num_files(capture_options *capture_opts)
 928 {
 929     /* Check the value range of the ring_num_files parameter */
 930     if (capture_opts->ring_num_files > RINGBUFFER_MAX_NUM_FILES) {
 931         cmdarg_err("Too many ring buffer files (%u). Reducing to %u.\n", capture_opts->ring_num_files, RINGBUFFER_MAX_NUM_FILES);
 932         capture_opts->ring_num_files = RINGBUFFER_MAX_NUM_FILES;
 933     } else if (capture_opts->ring_num_files > RINGBUFFER_WARN_NUM_FILES) {
 934         cmdarg_err("%u is a lot of ring buffer files.\n", capture_opts->ring_num_files);
 935     }
 936 #if RINGBUFFER_MIN_NUM_FILES > 0
 937     else if (capture_opts->ring_num_files < RINGBUFFER_MIN_NUM_FILES)
 938         cmdarg_err("Too few ring buffer files (%u). Increasing to %u.\n", capture_opts->ring_num_files, RINGBUFFER_MIN_NUM_FILES);
 939         capture_opts->ring_num_files = RINGBUFFER_MIN_NUM_FILES;
 940 #endif
 941 }
 942
 943 /*
 944  * If no interface was specified explicitly, pick a default.
 945  */
 946 int
 947 capture_opts_default_iface_if_necessary(capture_options *capture_opts,
 948                                         const char *capture_device)
 949 {
 950     int status;
 951
 952     /* Did the user specify an interface to use? */
 953     if (capture_opts->num_selected != 0 || capture_opts->ifaces->len != 0) {
 954         /* yes they did, return immediately - nothing further to do here */
 955         return 0;
 956     }
 957
 958     /* No - is a default specified in the preferences file? */
 959     if (capture_device != NULL) {
 960         /* Yes - use it. */
 961         status = capture_opts_add_iface_opt(capture_opts, capture_device);
 962         return status;
 963     }
 964     /* No default in preferences file, just pick the first interface from the list of interfaces. */
 965     return capture_opts_add_iface_opt(capture_opts, "1");
 966 }
 967
 968 #ifndef S_IFIFO
 969 #define S_IFIFO _S_IFIFO
 970 #endif
 971 #ifndef S_ISFIFO
 972 #define S_ISFIFO(mode)  (((mode) & S_IFMT) == S_IFIFO)
 973 #endif
 974
 975 /* copied from filesystem.c */
 976 static int
 977 capture_opts_test_for_fifo(const char *path)
 978 {
 979     ws_statb64 statb;
 980
 981     if (ws_stat64(path, &statb) < 0)
 982         return errno;
 983
 984     if (S_ISFIFO(statb.st_mode))
 985         return ESPIPE;
 986     else
 987         return 0;
 988 }
 989
 990 static gboolean
 991 capture_opts_output_to_pipe(const char *save_file, gboolean *is_pipe)
 992 {
 993     int err;
 994
 995     *is_pipe = FALSE;
 996
 997     if (save_file != NULL) {
 998         /* We're writing to a capture file. */
 999         if (strcmp(save_file, "-") == 0) {
1000             /* Writing to stdout. */
1001             /* XXX - should we check whether it's a pipe?  It's arguably
1002                silly to do "-w - >output_file" rather than "-w output_file",
1003                but by not checking we might be violating the Principle Of
1004                Least Astonishment. */
1005             *is_pipe = TRUE;
1006         } else {
1007             /* not writing to stdout, test for a FIFO (aka named pipe) */
1008             err = capture_opts_test_for_fifo(save_file);
1009             switch (err) {
1010
1011             case ENOENT:      /* it doesn't exist, so we'll be creating it,
1012                                  and it won't be a FIFO */
1013             case 0:           /* found it, but it's not a FIFO */
1014                 break;
1015
1016             case ESPIPE:      /* it is a FIFO */
1017                 *is_pipe = TRUE;
1018                 break;
1019
1020             default:          /* couldn't stat it              */
1021                 break;          /* ignore: later attempt to open */
1022                 /*  will generate a nice msg     */
1023             }
1024         }
1025     }
1026
1027     return 0;
1028 }
1029
1030 void
1031 capture_opts_del_iface(capture_options *capture_opts, guint if_index)
1032 {
1033     interface_options interface_opts;
1034
1035     interface_opts = g_array_index(capture_opts->ifaces, interface_options, if_index);
1036     /* XXX - check if found? */
1037
1038     g_free(interface_opts.name);
1039     g_free(interface_opts.descr);
1040     if (interface_opts.console_display_name != NULL)
1041         g_free(interface_opts.console_display_name);
1042     g_free(interface_opts.cfilter);
1043 #ifdef HAVE_EXTCAP
1044     g_free(interface_opts.extcap);
1045     g_free(interface_opts.extcap_fifo);
1046     if (interface_opts.extcap_args)
1047         g_hash_table_unref(interface_opts.extcap_args);
1048     if (interface_opts.extcap_pid != INVALID_EXTCAP_PID)
1049         g_spawn_close_pid(interface_opts.extcap_pid);
1050 #endif
1051 #ifdef HAVE_PCAP_REMOTE
1052     if (interface_opts.src_type == CAPTURE_IFREMOTE) {
1053         g_free(interface_opts.remote_host);
1054         g_free(interface_opts.remote_port);
1055         g_free(interface_opts.auth_username);
1056         g_free(interface_opts.auth_password);
1057     }
1058 #endif
1059     capture_opts->ifaces = g_array_remove_index(capture_opts->ifaces, if_index);
1060 }
1061
1062
1063
1064 /*
1065  * Add all non-hidden selected interfaces in the "all interfaces" list
1066  * to the list of interfaces for the capture.
1067  */
1068 void
1069 collect_ifaces(capture_options *capture_opts)
1070 {
1071     guint i;
1072     interface_t device;
1073     interface_options interface_opts;
1074
1075     /* Empty out the existing list of interfaces. */
1076     for (i = capture_opts->ifaces->len; i != 0; i--)
1077         capture_opts_del_iface(capture_opts, i-1);
1078
1079     /* Now fill the list up again. */
1080     for (i = 0; i < capture_opts->all_ifaces->len; i++) {
1081         device = g_array_index(capture_opts->all_ifaces, interface_t, i);
1082         if (!device.hidden && device.selected) {
1083             interface_opts.name = g_strdup(device.name);
1084             interface_opts.descr = g_strdup(device.display_name);
1085             interface_opts.console_display_name = g_strdup(device.name);
1086             interface_opts.linktype = device.active_dlt;
1087             interface_opts.cfilter = g_strdup(device.cfilter);
1088             interface_opts.snaplen = device.snaplen;
1089             interface_opts.has_snaplen = device.has_snaplen;
1090             interface_opts.promisc_mode = device.pmode;
1091             interface_opts.if_type = device.if_info.type;
1092 #ifdef HAVE_EXTCAP
1093             interface_opts.extcap = g_strdup(device.if_info.extcap);
1094             interface_opts.extcap_fifo = NULL;
1095             interface_opts.extcap_args = device.external_cap_args_settings;
1096             interface_opts.extcap_pid = INVALID_EXTCAP_PID;
1097             if (interface_opts.extcap_args)
1098                 g_hash_table_ref(interface_opts.extcap_args);
1099 #endif
1100 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
1101             interface_opts.buffer_size =  device.buffer;
1102 #endif
1103 #ifdef HAVE_PCAP_CREATE
1104             interface_opts.monitor_mode = device.monitor_mode_enabled;
1105 #endif
1106 #ifdef HAVE_PCAP_REMOTE
1107             interface_opts.src_type = CAPTURE_IFREMOTE;
1108             interface_opts.remote_host = g_strdup(device.remote_opts.remote_host_opts.remote_host);
1109             interface_opts.remote_port = g_strdup(device.remote_opts.remote_host_opts.remote_port);
1110             interface_opts.auth_type = device.remote_opts.remote_host_opts.auth_type;
1111             interface_opts.auth_username = g_strdup(device.remote_opts.remote_host_opts.auth_username);
1112             interface_opts.auth_password = g_strdup(device.remote_opts.remote_host_opts.auth_password);
1113             interface_opts.datatx_udp = device.remote_opts.remote_host_opts.datatx_udp;
1114             interface_opts.nocap_rpcap = device.remote_opts.remote_host_opts.nocap_rpcap;
1115             interface_opts.nocap_local = device.remote_opts.remote_host_opts.nocap_local;
1116 #endif
1117 #ifdef HAVE_PCAP_SETSAMPLING
1118             interface_opts.sampling_method = device.remote_opts.sampling_method;
1119             interface_opts.sampling_param  = device.remote_opts.sampling_param;
1120 #endif
1121             g_array_append_val(capture_opts->ifaces, interface_opts);
1122         } else {
1123             continue;
1124         }
1125     }
1126 }
1127
1128
1129 #endif /* HAVE_LIBPCAP */
1130
1131 /*
1132  * Editor modelines  -  http://www.wireshark.org/tools/modelines.html
1133  *
1134  * Local variables:
1135  * c-basic-offset: 4
1136  * tab-width: 8
1137  * indent-tabs-mode: nil
1138  * End:
1139  *
1140  * vi: set shiftwidth=4 tabstop=8 expandtab:
1141  * :indentSize=4:tabSize=8:noTabs=true:
1142  */