capture_opts.h

   1 /* capture_opts.h
   2  * Capture options (all parameters needed to do the actual capture)
   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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  23  */
  24
  25
  26 /** @file
  27  *
  28  *  Capture options (all parameters needed to do the actual capture)
  29  *
  30  */
  31
  32 #ifndef __CAPTURE_OPTS_H__
  33 #define __CAPTURE_OPTS_H__
  34
  35 #ifdef HAVE_SYS_TYPES_H
  36 # include <sys/types.h>     /* for gid_t */
  37 #endif
  38
  39 #include "capture_ifinfo.h"
  40
  41 #ifdef __cplusplus
  42 extern "C" {
  43 #endif /* __cplusplus */
  44
  45 /* Attention:
  46    for tshark, we're using a leading - in the optstring to prevent getopt()
  47    from permuting the argv[] entries, in this case, unknown argv[] entries
  48    will be returned as parameters to a dummy-option 1
  49    in short: we must not use 1 here */
  50
  51 /* this does not clash with tshark's -2 option which returns '2' */
  52 #define LONGOPT_NUM_CAP_COMMENT 2
  53
  54
  55 #ifdef HAVE_PCAP_REMOTE
  56 /* Type of capture source */
  57 typedef enum {
  58     CAPTURE_IFLOCAL,        /**< Local network interface */
  59     CAPTURE_IFREMOTE        /**< Remote network interface */
  60 } capture_source;
  61
  62 /* Type of RPCAPD Authentication */
  63 typedef enum {
  64     CAPTURE_AUTH_NULL,      /**< No authentication */
  65     CAPTURE_AUTH_PWD        /**< User/password authentication */
  66 } capture_auth;
  67 #endif
  68 #ifdef HAVE_PCAP_SETSAMPLING
  69 /**
  70  * Method of packet sampling (dropping some captured packets),
  71  * may require additional integer parameter, marked here as N
  72  */
  73 typedef enum {
  74     CAPTURE_SAMP_NONE,      /**< No sampling - capture all packets */
  75     CAPTURE_SAMP_BY_COUNT,  /**< Counter-based sampling -
  76                                  capture 1 packet from every N */
  77     CAPTURE_SAMP_BY_TIMER   /**< Timer-based sampling -
  78                                  capture no more than 1 packet
  79                                  in N milliseconds */
  80 } capture_sampling;
  81 #endif
  82
  83 #ifdef HAVE_PCAP_REMOTE
  84 struct remote_host_info {
  85     gchar *remote_host;          /**< Host name or network address for remote capturing */
  86     gchar *remote_port;          /**< TCP port of remote RPCAP server */
  87     gint auth_type;              /**< Authentication type */
  88     gchar *auth_username;        /**< Remote authentication parameters */
  89     gchar *auth_password;        /**< Remote authentication parameters */
  90     gboolean datatx_udp;
  91     gboolean nocap_rpcap;
  92     gboolean nocap_local;
  93 };
  94
  95 typedef struct remote_options_tag {
  96     capture_source src_type;
  97     struct remote_host_info remote_host_opts;
  98 #ifdef HAVE_PCAP_SETSAMPLING
  99     capture_sampling sampling_method;
 100     int sampling_param;
 101 #endif
 102 } remote_options;
 103 #endif /* HAVE_PCAP_REMOTE */
 104
 105 typedef struct interface_tag {
 106     gchar *name;
 107     gchar *display_name;
 108     gchar *friendly_name;
 109     guint type;
 110     gchar *addresses;
 111     gint no_addresses;
 112     gchar *cfilter;
 113     GList *links;
 114     gint active_dlt;
 115     gboolean pmode;
 116     gboolean has_snaplen;
 117     guint snaplen;
 118     gboolean local;
 119 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
 120     gint buffer;
 121 #endif
 122 #ifdef HAVE_PCAP_CREATE
 123     gboolean monitor_mode_enabled;
 124     gboolean monitor_mode_supported;
 125 #endif
 126 #ifdef HAVE_PCAP_REMOTE
 127     remote_options remote_opts;
 128 #endif
 129     guint32     last_packets;
 130     if_info_t   if_info;
 131     gboolean    selected;
 132     gboolean    hidden;
 133     gboolean    locked;
 134 } interface_t;
 135
 136 typedef struct link_row_tag {
 137     gchar *name;
 138     gint dlt;
 139 } link_row;
 140
 141 typedef struct interface_options_tag {
 142     gchar *name; /* the name of the interface provided to winpcap/libpcap to specify the interface */
 143     gchar *descr;
 144     gchar *console_display_name; /* the name displayed in the console, also the basis for autonamed pcap filenames */
 145     gchar *cfilter;
 146     gboolean has_snaplen;
 147     int snaplen;
 148     int linktype;
 149     gboolean promisc_mode;
 150 #if defined(_WIN32) || defined(HAVE_PCAP_CREATE)
 151     int buffer_size;
 152 #endif
 153     gboolean monitor_mode;
 154 #ifdef HAVE_PCAP_REMOTE
 155     capture_source src_type;
 156     gchar *remote_host;
 157     gchar *remote_port;
 158     capture_auth auth_type;
 159     gchar *auth_username;
 160     gchar *auth_password;
 161     gboolean datatx_udp;
 162     gboolean nocap_rpcap;
 163     gboolean nocap_local;
 164 #endif
 165 #ifdef HAVE_PCAP_SETSAMPLING
 166     capture_sampling sampling_method;
 167     int sampling_param;
 168 #endif
 169 } interface_options;
 170
 171 /** Capture options coming from user interface */
 172 typedef struct capture_options_tag {
 173     /* general */
 174     GArray   *ifaces;               /**< array of interfaces.
 175                                          Currently only used by dumpcap. */
 176     GArray   *all_ifaces;
 177     guint    num_selected;
 178     interface_options default_options;
 179     gboolean saving_to_file;        /**< TRUE if capture is writing to a file */
 180     gchar    *save_file;            /**< the capture file name */
 181     gboolean group_read_access;     /**< TRUE is group read permission needs to be set */
 182     gboolean use_pcapng;            /**< TRUE if file format is pcapng */
 183
 184     /* GUI related */
 185     gboolean real_time_mode;        /**< Update list of packets in real time */
 186     gboolean show_info;             /**< show the info dialog */
 187     gboolean quit_after_cap;        /**< Makes a "capture only mode". Implies -k */
 188     gboolean restart;               /**< restart after closing is done */
 189     gchar    *orig_save_file;       /**< the original capture file name (saved for a restart) */
 190
 191     /* multiple files (and ringbuffer) */
 192     gboolean multi_files_on;        /**< TRUE if ring buffer in use */
 193
 194     gboolean has_file_duration;     /**< TRUE if ring duration specified */
 195     gint32 file_duration;           /**< Switch file after n seconds */
 196     gboolean has_ring_num_files;    /**< TRUE if ring num_files specified */
 197     guint32 ring_num_files;         /**< Number of multiple buffer files */
 198
 199     /* autostop conditions */
 200     gboolean has_autostop_files;    /**< TRUE if maximum number of capture files
 201                                          are specified */
 202     gint32 autostop_files;          /**< Maximum number of capture files */
 203
 204     gboolean has_autostop_packets;  /**< TRUE if maximum packet count is
 205                                          specified */
 206     int autostop_packets;           /**< Maximum packet count */
 207     gboolean has_autostop_filesize; /**< TRUE if maximum capture file size
 208                                          is specified */
 209     guint32 autostop_filesize;      /**< Maximum capture file size */
 210     gboolean has_autostop_duration; /**< TRUE if maximum capture duration
 211                                          is specified */
 212     gint32 autostop_duration;       /**< Maximum capture duration */
 213
 214     gchar *capture_comment;         /** capture comment to write to the
 215                                         output file */
 216
 217     /* internally used (don't touch from outside) */
 218     gboolean output_to_pipe;        /**< save_file is a pipe (named or stdout) */
 219     gboolean capture_child;         /**< hidden option: Wireshark child mode */
 220 } capture_options;
 221
 222 /* initialize the capture_options with some reasonable values */
 223 extern void
 224 capture_opts_init(capture_options *capture_opts);
 225
 226 /* set a command line option value */
 227 extern int
 228 capture_opts_add_opt(capture_options *capture_opts, int opt, const char *optarg, gboolean *start_capture);
 229
 230 /* log content of capture_opts */
 231 extern void
 232 capture_opts_log(const char *log_domain, GLogLevelFlags log_level, capture_options *capture_opts);
 233
 234 /* print interface capabilities, including link layer types */
 235 extern void
 236 capture_opts_print_if_capabilities(if_capabilities_t *caps, char *name,
 237                                    gboolean monitor_mode);
 238
 239 /* print list of interfaces */
 240 extern void
 241 capture_opts_print_interfaces(GList *if_list);
 242
 243 /* trim the snaplen entry */
 244 extern void
 245 capture_opts_trim_snaplen(capture_options *capture_opts, int snaplen_min);
 246
 247 /* trim the ring_num_files entry */
 248 extern void
 249 capture_opts_trim_ring_num_files(capture_options *capture_opts);
 250
 251 /* pick default interface if none was specified */
 252 extern int
 253 capture_opts_default_iface_if_necessary(capture_options *capture_opts,
 254                                         const char *capture_device);
 255
 256 extern void
 257 collect_ifaces(capture_options *capture_opts);
 258
 259 /* Default capture buffer size in Mbytes. */
 260 #define DEFAULT_CAPTURE_BUFFER_SIZE 2
 261
 262 #ifdef __cplusplus
 263 }
 264 #endif /* __cplusplus */
 265
 266 #endif /* capture_opts.h */