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capture_opts.h
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capture_opts.h
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/* capture_opts.h
* Capture options (all parameters needed to do the actual capture)
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
/** @file
*
* Capture options (all parameters needed to do the actual capture)
*
*/
#ifndef __CAPTURE_OPTS_H__
#define __CAPTURE_OPTS_H__
#include <sys/types.h> /* for gid_t */
#include <caputils/capture_ifinfo.h>
#ifdef _WIN32
#include <windows.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/*
* Long options.
* We do not currently have long options corresponding to all short
* options; we should probably pick appropriate option names for them.
*
* For long options with no corresponding short options, we define values
* outside the range of ASCII graphic characters, make that the last
* component of the entry for the long option, and have a case for that
* option in the switch statement.
*
* We also pick values < 4096, so as to leave values >= 4096 for
* other long options.
*
* NOTE:
* for tshark, we're using a leading - in the optstring to prevent getopt()
* from permuting the argv[] entries, in this case, unknown argv[] entries
* will be returned as parameters to a dummy-option 1.
* In short: we must not use 1 here, which is another reason to use
* values outside the range of ASCII graphic characters.
*/
#define LONGOPT_NUM_CAP_COMMENT 128
#define LONGOPT_LIST_TSTAMP_TYPES 129
#define LONGOPT_SET_TSTAMP_TYPE 130
/*
* Options for capturing common to all capturing programs.
*/
#ifdef HAVE_PCAP_REMOTE
#define OPTSTRING_A "A:"
#else
#define OPTSTRING_A ""
#endif
#ifdef CAN_SET_CAPTURE_BUFFER_SIZE
#define LONGOPT_BUFFER_SIZE \
{"buffer-size", required_argument, NULL, 'B'},
#define OPTSTRING_B "B:"
#else
#define LONGOPT_BUFFER_SIZE
#define OPTSTRING_B ""
#endif
#ifdef HAVE_PCAP_CREATE
#define LONGOPT_MONITOR_MODE {"monitor-mode", no_argument, NULL, 'I'},
#define OPTSTRING_I "I"
#else
#define LONGOPT_MONITOR_MODE
#define OPTSTRING_I ""
#endif
#define LONGOPT_CAPTURE_COMMON \
{"capture-comment", required_argument, NULL, LONGOPT_NUM_CAP_COMMENT}, \
{"autostop", required_argument, NULL, 'a'}, \
{"ring-buffer", required_argument, NULL, 'b'}, \
LONGOPT_BUFFER_SIZE \
{"list-interfaces", no_argument, NULL, 'D'}, \
{"interface", required_argument, NULL, 'i'}, \
LONGOPT_MONITOR_MODE \
{"list-data-link-types", no_argument, NULL, 'L'}, \
{"no-promiscuous-mode", no_argument, NULL, 'p'}, \
{"snapshot-length", required_argument, NULL, 's'}, \
{"linktype", required_argument, NULL, 'y'}, \
{"list-time-stamp-types", no_argument, NULL, LONGOPT_LIST_TSTAMP_TYPES}, \
{"time-stamp-type", required_argument, NULL, LONGOPT_SET_TSTAMP_TYPE},
#define OPTSTRING_CAPTURE_COMMON \
"a:" OPTSTRING_A "b:" OPTSTRING_B "c:Df:i:" OPTSTRING_I "Lps:y:"
#ifdef HAVE_PCAP_REMOTE
/* Type of capture source */
typedef enum {
CAPTURE_IFLOCAL, /**< Local network interface */
CAPTURE_IFREMOTE /**< Remote network interface */
} capture_source;
/* Type of RPCAPD Authentication */
typedef enum {
CAPTURE_AUTH_NULL, /**< No authentication */
CAPTURE_AUTH_PWD /**< User/password authentication */
} capture_auth;
#endif
#ifdef HAVE_PCAP_SETSAMPLING
/**
* Method of packet sampling (dropping some captured packets),
* may require additional integer parameter, marked here as N
*/
typedef enum {
CAPTURE_SAMP_NONE, /**< No sampling - capture all packets */
CAPTURE_SAMP_BY_COUNT, /**< Counter-based sampling -
capture 1 packet from every N */
CAPTURE_SAMP_BY_TIMER /**< Timer-based sampling -
capture no more than 1 packet
in N milliseconds */
} capture_sampling;
#endif
#ifdef HAVE_PCAP_REMOTE
struct remote_host_info {
gchar *remote_host; /**< Host name or network address for remote capturing */
gchar *remote_port; /**< TCP port of remote RPCAP server */
capture_auth auth_type; /**< Authentication type */
gchar *auth_username; /**< Remote authentication parameters */
gchar *auth_password; /**< Remote authentication parameters */
gboolean datatx_udp;
gboolean nocap_rpcap;
gboolean nocap_local;
};
struct remote_host {
gchar *r_host; /**< Host name or network address for remote capturing */
gchar *remote_port; /**< TCP port of remote RPCAP server */
capture_auth auth_type; /**< Authentication type */
gchar *auth_username; /**< Remote authentication parameters */
gchar *auth_password; /**< Remote authentication parameters */
};
typedef struct remote_options_tag {
capture_source src_type;
struct remote_host_info remote_host_opts;
#ifdef HAVE_PCAP_SETSAMPLING
capture_sampling sampling_method;
int sampling_param;
#endif
} remote_options;
#endif /* HAVE_PCAP_REMOTE */
typedef struct interface_tag {
gchar *name;
gchar *display_name;
gchar *friendly_name;
guint type;
gchar *addresses;
gint no_addresses;
gchar *cfilter;
GList *links;
gint active_dlt;
gboolean pmode;
gboolean has_snaplen;
int snaplen;
gboolean local;
#ifdef CAN_SET_CAPTURE_BUFFER_SIZE
gint buffer;
#endif
#ifdef HAVE_PCAP_CREATE
gboolean monitor_mode_enabled;
gboolean monitor_mode_supported;
#endif
#ifdef HAVE_PCAP_REMOTE
remote_options remote_opts;
#endif
guint32 last_packets;
guint32 packet_diff;
if_info_t if_info;
gboolean selected;
gboolean hidden;
/* External capture cached data */
GHashTable *external_cap_args_settings;
gchar *timestamp_type;
} interface_t;
typedef struct link_row_tag {
gchar *name;
gint dlt;
} link_row;
typedef struct interface_options_tag {
gchar *name; /* the name of the interface supplied to libpcap/WinPcap/Npcap to specify the interface */
gchar *descr; /* a more user-friendly description of the interface; may be NULL if none */
gchar *display_name; /* the name displayed in the console and title bar */
gchar *cfilter;
gboolean has_snaplen;
int snaplen;
int linktype;
gboolean promisc_mode;
interface_type if_type;
gchar *extcap;
gchar *extcap_fifo;
GHashTable *extcap_args;
GPid extcap_pid; /* pid of running process or WS_INVALID_PID */
gpointer extcap_pipedata;
guint extcap_child_watch;
#ifdef _WIN32
HANDLE extcap_pipe_h;
HANDLE extcap_control_in_h;
HANDLE extcap_control_out_h;
#endif
gchar *extcap_control_in;
gchar *extcap_control_out;
#ifdef CAN_SET_CAPTURE_BUFFER_SIZE
int buffer_size;
#endif
gboolean monitor_mode;
#ifdef HAVE_PCAP_REMOTE
capture_source src_type;
gchar *remote_host;
gchar *remote_port;
capture_auth auth_type;
gchar *auth_username;
gchar *auth_password;
gboolean datatx_udp;
gboolean nocap_rpcap;
gboolean nocap_local;
#endif
#ifdef HAVE_PCAP_SETSAMPLING
capture_sampling sampling_method;
int sampling_param;
#endif
gchar *timestamp_type; /* requested timestamp as string */
int timestamp_type_id; /* Timestamp type to pass to pcap_set_tstamp_type.
only valid if timestamp_type != NULL */
} interface_options;
/** Capture options coming from user interface */
typedef struct capture_options_tag {
/* general */
GArray *ifaces; /**< the interfaces to use for the
next capture, entries are of
type interface_options */
GArray *all_ifaces; /**< all interfaces, entries are
of type interface_t */
int ifaces_err; /**< if all_ifaces is null, the error
when it was fetched, if any */
gchar *ifaces_err_info; /**< error string for that error */
guint num_selected;
/*
* Options to be applied to all interfaces.
*
* Some of these can be set from the GUI, others can't; setting
* the link-layer header type, for example, doesn't necessarily
* make sense, as different interfaces may support different sets
* of link-layer header types.
*
* Some that can't be set from the GUI can be set from the command
* line, by specifying them before any interface is specified.
* This includes the link-layer header type, so if somebody asks
* for a link-layer header type that an interface on which they're
* capturing doesn't support, we should report an error and fail
* to capture.
*
* These can be overridden per-interface.
*/
interface_options default_options;
gboolean saving_to_file; /**< TRUE if capture is writing to a file */
gchar *save_file; /**< the capture file name */
gboolean group_read_access; /**< TRUE is group read permission needs to be set */
gboolean use_pcapng; /**< TRUE if file format is pcapng */
/* GUI related */
gboolean real_time_mode; /**< Update list of packets in real time */
gboolean show_info; /**< show the info dialog. */
gboolean restart; /**< restart after closing is done */
gchar *orig_save_file; /**< the original capture file name (saved for a restart) */
/* multiple files (and ringbuffer) */
gboolean multi_files_on; /**< TRUE if ring buffer in use */
gboolean has_file_duration; /**< TRUE if ring duration specified */
gdouble file_duration; /**< Switch file after n seconds */
gboolean has_file_interval; /**< TRUE if ring interval specified */
gint32 file_interval; /**< Create time intervals of n seconds */
gboolean has_file_packets; /**< TRUE if ring packet count is
specified */
int file_packets; /**< Switch file after n packets */
gboolean has_ring_num_files; /**< TRUE if ring num_files specified */
guint32 ring_num_files; /**< Number of multiple buffer files */
/* autostop conditions */
gboolean has_autostop_files; /**< TRUE if maximum number of capture files
are specified */
int autostop_files; /**< Maximum number of capture files */
gboolean has_autostop_packets; /**< TRUE if maximum packet count is
specified */
int autostop_packets; /**< Maximum packet count */
gboolean has_autostop_filesize; /**< TRUE if maximum capture file size
is specified */
guint32 autostop_filesize; /**< Maximum capture file size in kB */
gboolean has_autostop_duration; /**< TRUE if maximum capture duration
is specified */
gdouble autostop_duration; /**< Maximum capture duration */
gchar *capture_comment; /** capture comment to write to the
output file */
/* internally used (don't touch from outside) */
gboolean output_to_pipe; /**< save_file is a pipe (named or stdout) */
gboolean capture_child; /**< hidden option: Wireshark child mode */
} capture_options;
/* initialize the capture_options with some reasonable values */
extern void
capture_opts_init(capture_options *capture_opts);
/* clean internal structures */
extern void
capture_opts_cleanup(capture_options *capture_opts);
/* set a command line option value */
extern int
capture_opts_add_opt(capture_options *capture_opts, int opt, const char *optarg, gboolean *start_capture);
/* log content of capture_opts */
extern void
capture_opts_log(const char *log_domain, GLogLevelFlags log_level, capture_options *capture_opts);
enum caps_query {
CAPS_MONITOR_MODE = 0x1,
CAPS_QUERY_LINK_TYPES = 0x2,
CAPS_QUERY_TIMESTAMP_TYPES = 0x4
};
/* print interface capabilities, including link layer types */
extern void
capture_opts_print_if_capabilities(if_capabilities_t *caps, char *name, int queries);
/* print list of interfaces */
extern void
capture_opts_print_interfaces(GList *if_list);
/* trim the snaplen entry */
extern void
capture_opts_trim_snaplen(capture_options *capture_opts, int snaplen_min);
/* trim the ring_num_files entry */
extern void
capture_opts_trim_ring_num_files(capture_options *capture_opts);
/* pick default interface if none was specified */
extern int
capture_opts_default_iface_if_necessary(capture_options *capture_opts,
const char *capture_device);
extern void
capture_opts_del_iface(capture_options *capture_opts, guint if_index);
extern void
collect_ifaces(capture_options *capture_opts);
extern void
capture_opts_free_interface_t(interface_t *device);
/* Default capture buffer size in Mbytes. */
#define DEFAULT_CAPTURE_BUFFER_SIZE 2
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* capture_opts.h */
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/