tshark(1)
NAME
tshark - Dump and analyze network traffic
SYNOPSIS
tshark [ -2 ] [ -a <capture autostop condition> ] ... [ -b <capture ring buffer option>] ... [ -B <capture buffer size> ] [ -c <capture packet count> ] [ -C <configuration profile> ] [ -d <layer type>==<selector>,<decode-as protocol> ] [ -D ] [ -e <field> ] [ -E <field print option> ] [ -f <capture filter> ] [ -F <file format> ] [ -g ] [ -h ] [ -H <input hosts file> ] [ -i <capture interface>|- ] [ -j <protocol match filter> ] [ -I ] [ -K <keytab> ] [ -l ] [ -L ] [ -n ] [ -N <name resolving flags> ] [ -o <preference setting> ] ... [ -O <protocols> ] [ -p ] [ -P ] [ -q ] [ -Q ] [ -r <infile> ] [ -R <Read filter> ] [ -s <capture snaplen> ] [ -S <separator> ] [ -t a|ad|adoy|d|dd|e|r|u|ud|udoy ] [ -T ek|fields|json|pdml|ps|psml|text ] [ -u <seconds type>] [ -U <tap_name>] [ -v ] [ -V ] [ -w <outfile>|- ] [ -W <file format option>] [ -x ] [ -X <eXtension option>] [ -y <capture link type> ] [ -Y <displaY filter> ] [ -z <statistics> ] [ --capture-comment <comment> ] [ <capture filter> ] tshark -G [ <report type> ]
DESCRIPTION
TShark is a network protocol analyzer. It lets you capture packet data from a live network, or read packets from a previously saved capture file, either printing a decoded form of those packets to the standard output or writing the packets to a file. TShark's native capture file format is pcap format, which is also the format used by tcpdump and various other tools. Without any options set, TShark will work much like tcpdump. It will use the pcap library to capture traffic from the first available network interface and displays a summary line on stdout for each received packet. TShark is able to detect, read and write the same capture files that are supported by Wireshark. The input file doesn't need a specific filename extension; the file format and an optional gzip compression will be automatically detected. Near the beginning of the DESCRIPTION section of wireshark(1) or <https://www.wireshark.org/docs/man-pages/wireshark.html> is a detailed description of the way Wireshark handles this, which is the same way Tshark handles this. Compressed file support uses (and therefore requires) the zlib library. If the zlib library is not present, TShark will compile, but will be unable to read compressed files. If the -w option is not specified, TShark writes to the standard output the text of a decoded form of the packets it captures or reads. If the -w option is specified, TShark writes to the file specified by that option the raw data of the packets, along with the packets' time stamps. When writing a decoded form of packets, TShark writes, by default, a summary line containing the fields specified by the preferences file (which are also the fields displayed in the packet list pane in Wireshark), although if it's writing packets as it captures them, rather than writing packets from a saved capture file, it won't show the "frame number" field. If the -V option is specified, it writes instead a view of the details of the packet, showing all the fields of all protocols in the packet. If the -O option is specified, it will only show the full protocols specified. Use the output of "tshark -G protocols" to find the abbreviations of the protocols you can specify. If you want to write the decoded form of packets to a file, run TShark without the -w option, and redirect its standard output to the file (do not use the -w option). When writing packets to a file, TShark, by default, writes the file in pcap format, and writes all of the packets it sees to the output file. The -F option can be used to specify the format in which to write the file. This list of available file formats is displayed by the -F flag without a value. However, you can't specify a file format for a live capture. Read filters in TShark, which allow you to select which packets are to be decoded or written to a file, are very powerful; more fields are filterable in TShark than in other protocol analyzers, and the syntax you can use to create your filters is richer. As TShark progresses, expect more and more protocol fields to be allowed in read filters. Packet capturing is performed with the pcap library. The capture filter syntax follows the rules of the pcap library. This syntax is different from the read filter syntax. A read filter can also be specified when capturing, and only packets that pass the read filter will be displayed or saved to the output file; note, however, that capture filters are much more efficient than read filters, and it may be more difficult for TShark to keep up with a busy network if a read filter is specified for a live capture. A capture or read filter can either be specified with the -f or -R option, respectively, in which case the entire filter expression must be specified as a single argument (which means that if it contains spaces, it must be quoted), or can be specified with command-line arguments after the option arguments, in which case all the arguments after the filter arguments are treated as a filter expression. Capture filters are supported only when doing a live capture; read filters are supported when doing a live capture and when reading a capture file, but require TShark to do more work when filtering, so you might be more likely to lose packets under heavy load if you're using a read filter. If the filter is specified with command-line arguments after the option arguments, it's a capture filter if a capture is being done (i.e., if no -r option was specified) and a read filter if a capture file is being read (i.e., if a -r option was specified). The -G option is a special mode that simply causes Tshark to dump one of several types of internal glossaries and then exit.
OPTIONS
-2 Perform a two-pass analysis. This causes tshark to buffer output
until the entire first pass is done, but allows it to fill in
fields that require future knowledge, such as 'response in frame #'
fields. Also permits reassembly frame dependencies to be calculated
correctly.
-a <capture autostop condition>
Specify a criterion that specifies when TShark is to stop writing
to a capture file. The criterion is of the form test:value, where
test is one of:
duration:value Stop writing to a capture file after value seconds
have elapsed.
filesize:value Stop writing to a capture file after it reaches a
size of value kB. If this option is used together with the -b
option, TShark will stop writing to the current capture file and
switch to the next one if filesize is reached. When reading a
capture file, TShark will stop reading the file after the number of
bytes read exceeds this number (the complete packet will be read,
so more bytes than this number may be read). Note that the
filesize is limited to a maximum value of 2 GiB.
files:value Stop writing to capture files after value number of
files were written.
-b <capture ring buffer option>
Cause TShark to run in "multiple files" mode. In "multiple files"
mode, TShark will write to several capture files. When the first
capture file fills up, TShark will switch writing to the next file
and so on.
The created filenames are based on the filename given with the -w
option, the number of the file and on the creation date and time,
e.g. outfile_00001_20050604120117.pcap,
outfile_00002_20050604120523.pcap, ...
With the files option it's also possible to form a "ring buffer".
This will fill up new files until the number of files specified, at
which point TShark will discard the data in the first file and
start writing to that file and so on. If the files option is not
set, new files filled up until one of the capture stop conditions
match (or until the disk is full).
The criterion is of the form key:value, where key is one of:
duration:value switch to the next file after value seconds have
elapsed, even if the current file is not completely filled up.
filesize:value switch to the next file after it reaches a size of
value kB. Note that the filesize is limited to a maximum value of
2 GiB.
files:value begin again with the first file after value number of
files were written (form a ring buffer). This value must be less
than 100000. Caution should be used when using large numbers of
files: some filesystems do not handle many files in a single
directory well. The files criterion requires either duration or
filesize to be specified to control when to go to the next file.
It should be noted that each -b parameter takes exactly one
criterion; to specify two criterion, each must be preceded by the
-b option.
Example: -b filesize:1000 -b files:5 results in a ring buffer of
five files of size one megabyte each.
-B <capture buffer size>
Set capture buffer size (in MiB, default is 2 MiB). This is used
by the capture driver to buffer packet data until that data can be
written to disk. If you encounter packet drops while capturing,
try to increase this size. Note that, while Tshark attempts to set
the buffer size to 2 MiB by default, and can be told to set it to a
larger value, the system or interface on which you're capturing
might silently limit the capture buffer size to a lower value or
raise it to a higher value.
This is available on UNIX systems with libpcap 1.0.0 or later and
on Windows. It is not available on UNIX systems with earlier
versions of libpcap.
This option can occur multiple times. If used before the first
occurrence of the -i option, it sets the default capture buffer
size. If used after an -i option, it sets the capture buffer size
for the interface specified by the last -i option occurring before
this option. If the capture buffer size is not set specifically,
the default capture buffer size is used instead.
-c <capture packet count>
Set the maximum number of packets to read when capturing live data.
If reading a capture file, set the maximum number of packets to
read.
-C <configuration profile>
Run with the given configuration profile.
-d <layer type>==<selector>,<decode-as protocol>
Like Wireshark's Decode As... feature, this lets you specify how a
layer type should be dissected. If the layer type in question (for
example, tcp.port or udp.port for a TCP or UDP port number) has the
specified selector value, packets should be dissected as the
specified protocol.
Example: -d tcp.port==8888,http will decode any traffic running
over TCP port 8888 as HTTP.
Example: -d tcp.port==8888:3,http will decode any traffic running
over TCP ports 8888, 8889 or 8890 as HTTP.
Example: -d tcp.port==8888-8890,http will decode any traffic
running over TCP ports 8888, 8889 or 8890 as HTTP.
Using an invalid selector or protocol will print out a list of
valid selectors and protocol names, respectively.
Example: -d . is a quick way to get a list of valid selectors.
Example: -d ethertype==0x0800. is a quick way to get a list of
protocols that can be selected with an ethertype.
-D Print a list of the interfaces on which TShark can capture, and
exit. For each network interface, a number and an interface name,
possibly followed by a text description of the interface, is
printed. The interface name or the number can be supplied to the
-i option to specify an interface on which to capture.
This can be useful on systems that don't have a command to list
them (e.g., Windows systems, or UNIX systems lacking ifconfig -a);
the number can be useful on Windows 2000 and later systems, where
the interface name is a somewhat complex string.
Note that "can capture" means that TShark was able to open that
device to do a live capture. Depending on your system you may need
to run tshark from an account with special privileges (for example,
as root) to be able to capture network traffic. If TShark -D is
not run from such an account, it will not list any interfaces.
-e <field>
Add a field to the list of fields to display if -T
ek|fields|json|pdml is selected. This option can be used multiple
times on the command line. At least one field must be provided if
the -T fields option is selected. Column names may be used prefixed
with "_ws.col."
Example: -e frame.number -e ip.addr -e udp -e _ws.col.Info
Giving a protocol rather than a single field will print multiple
items of data about the protocol as a single field. Fields are
separated by tab characters by default. -E controls the format of
the printed fields.
-E <field print option>
Set an option controlling the printing of fields when -T fields is
selected.
Options are:
bom=y|n If y, prepend output with the UTF-8 byte order mark
(hexadecimal ef, bb, bf). Defaults to n.
header=y|n If y, print a list of the field names given using -e as
the first line of the output; the field name will be separated
using the same character as the field values. Defaults to n.
separator=/t|/s|<character> Set the separator character to use for
fields. If /t tab will be used (this is the default), if /s, a
single space will be used. Otherwise any character that can be
accepted by the command line as part of the option may be used.
occurrence=f|l|a Select which occurrence to use for fields that
have multiple occurrences. If f the first occurrence will be used,
if l the last occurrence will be used and if a all occurrences will
be used (this is the default).
aggregator=,|/s|<character> Set the aggregator character to use for
fields that have multiple occurrences. If , a comma will be used
(this is the default), if /s, a single space will be used.
Otherwise any character that can be accepted by the command line as
part of the option may be used.
quote=d|s|n Set the quote character to use to surround fields. d
uses double-quotes, s single-quotes, n no quotes (the default).
-f <capture filter>
Set the capture filter expression.
This option can occur multiple times. If used before the first
occurrence of the -i option, it sets the default capture filter
expression. If used after an -i option, it sets the capture filter
expression for the interface specified by the last -i option
occurring before this option. If the capture filter expression is
not set specifically, the default capture filter expression is used
if provided.
Pre-defined capture filter names, as shown in the GUI menu item
Capture->Capture Filters, can be used by prefixing the argument
with "predef:". Example: -f "predef:MyPredefinedHostOnlyFilter"
-F <file format>
Set the file format of the output capture file written using the -w
option. The output written with the -w option is raw packet data,
not text, so there is no -F option to request text output. The
option -F without a value will list the available formats.
-g This option causes the output file(s) to be created with group-read
permission (meaning that the output file(s) can be read by other
members of the calling user's group).
-G [ <report type> ]
The -G option will cause Tshark to dump one of several types of
glossaries and then exit. If no specific glossary type is
specified, then the fields report will be generated by default.
The available report types include:
column-formats Dumps the column formats understood by tshark.
There is one record per line. The fields are tab-delimited.
* Field 1 = format string (e.g. "%rD")
* Field 2 = text description of format string (e.g. "Dest port (resolved)")
currentprefs Dumps a copy of the current preferences file to
stdout.
decodes Dumps the "layer type"/"decode as" associations to stdout.
There is one record per line. The fields are tab-delimited.
* Field 1 = layer type, e.g. "tcp.port"
* Field 2 = selector in decimal
* Field 3 = "decode as" name, e.g. "http"
defaultprefs Dumps a default preferences file to stdout.
dissector-tables Dumps a list of dissector tables to stdout.
There is one record per line. The fields are tab-delimited.
* Field 1 = dissector table name, e.g. "tcp.port"
* Field 2 = name used for the dissector table in the GUI
* Field 3 = type (textual representation of the ftenum type)
* Field 4 = base for display (for integer types)
fieldcount Dumps the number of header fields to stdout.
fields Dumps the contents of the registration database to stdout.
An independent program can take this output and format it into nice
tables or HTML or whatever. There is one record per line. Each
record is either a protocol or a header field, differentiated by
the first field. The fields are tab-delimited.
* Protocols
* ---------
* Field 1 = 'P'
* Field 2 = descriptive protocol name
* Field 3 = protocol abbreviation
*
* Header Fields
* -------------
* Field 1 = 'F'
* Field 2 = descriptive field name
* Field 3 = field abbreviation
* Field 4 = type (textual representation of the ftenum type)
* Field 5 = parent protocol abbreviation
* Field 6 = base for display (for integer types); "parent bitfield width" for FT_BOOLEAN
* Field 7 = bitmask: format: hex: 0x....
* Field 8 = blurb describing field
ftypes Dumps the "ftypes" (fundamental types) understood by tshark.
There is one record per line. The fields are tab-delimited.
* Field 1 = FTYPE (e.g "FT_IPv6")
* Field 2 = text description of type (e.g. "IPv6 address")
heuristic-decodes Dumps the heuristic decodes currently installed.
There is one record per line. The fields are tab-delimited.
* Field 1 = underlying dissector (e.g. "tcp")
* Field 2 = name of heuristic decoder (e.g. ucp")
* Field 3 = heuristic enabled (e.g. "T" or "F")
plugins Dumps the plugins currently installed. There is one record
per line. The fields are tab-delimited.
* Field 1 = plugin library (e.g. "gryphon.so")
* Field 2 = plugin version (e.g. 0.0.4)
* Field 3 = plugin type (e.g. "dissector" or "tap")
* Field 4 = full path to plugin file
protocols Dumps the protocols in the registration database to
stdout. An independent program can take this output and format it
into nice tables or HTML or whatever. There is one record per
line. The fields are tab-delimited.
* Field 1 = protocol name
* Field 2 = protocol short name
* Field 3 = protocol filter name
values Dumps the value_strings, range_strings or true/false strings
for fields that have them. There is one record per line. Fields
are tab-delimited. There are three types of records: Value String,
Range String and True/False String. The first field, 'V', 'R' or
'T', indicates the type of record.
* Value Strings
* -------------
* Field 1 = 'V'
* Field 2 = field abbreviation to which this value string corresponds
* Field 3 = Integer value
* Field 4 = String
*
* Range Strings
* -------------
* Field 1 = 'R'
* Field 2 = field abbreviation to which this range string corresponds
* Field 3 = Integer value: lower bound
* Field 4 = Integer value: upper bound
* Field 5 = String
*
* True/False Strings
* ------------------
* Field 1 = 'T'
* Field 2 = field abbreviation to which this true/false string corresponds
* Field 3 = True String
* Field 4 = False String
-h Print the version and options and exits.
-H <input hosts file>
Read a list of entries from a "hosts" file, which will then be
written to a capture file. Implies -W n. Can be called multiple
times.
The "hosts" file format is documented at
<http://en.wikipedia.org/wiki/Hosts_(file)>.
-i <capture interface> | -
Set the name of the network interface or pipe to use for live
packet capture.
Network interface names should match one of the names listed in
"tshark -D" (described above); a number, as reported by "tshark
-D", can also be used. If you're using UNIX, "netstat -i" or
"ifconfig -a" might also work to list interface names, although not
all versions of UNIX support the -a option to ifconfig.
If no interface is specified, TShark searches the list of
interfaces, choosing the first non-loopback interface if there are
any non-loopback interfaces, and choosing the first loopback
interface if there are no non-loopback interfaces. If there are no
interfaces at all, TShark reports an error and doesn't start the
capture.
Pipe names should be either the name of a FIFO (named pipe) or
``-'' to read data from the standard input. Data read from pipes
must be in standard pcap format.
This option can occur multiple times. When capturing from multiple
interfaces, the capture file will be saved in pcap-ng format.
Note: the Win32 version of TShark doesn't support capturing from
pipes!
-I Put the interface in "monitor mode"; this is supported only on IEEE
802.11 Wi-Fi interfaces, and supported only on some operating
systems.
Note that in monitor mode the adapter might disassociate from the
network with which it's associated, so that you will not be able to
use any wireless networks with that adapter. This could prevent
accessing files on a network server, or resolving host names or
network addresses, if you are capturing in monitor mode and are not
connected to another network with another adapter.
This option can occur multiple times. If used before the first
occurrence of the -i option, it enables the monitor mode for all
interfaces. If used after an -i option, it enables the monitor
mode for the interface specified by the last -i option occurring
before this option.
-j <protocol match filter>
Protocol match filter used for ek|json|pdml output file types.
Parent node containing multiple child nodes is only included, if
the name is found in the filter.
Example: -j "http tcp ip"
-K <keytab>
Load kerberos crypto keys from the specified keytab file. This
option can be used multiple times to load keys from several files.
Example: -K krb5.keytab
-l Flush the standard output after the information for each packet is
printed. (This is not, strictly speaking, line-buffered if -V was
specified; however, it is the same as line-buffered if -V wasn't
specified, as only one line is printed for each packet, and, as -l
is normally used when piping a live capture to a program or script,
so that output for a packet shows up as soon as the packet is seen
and dissected, it should work just as well as true line-buffering.
We do this as a workaround for a deficiency in the Microsoft Visual
C++ C library.)
This may be useful when piping the output of TShark to another
program, as it means that the program to which the output is piped
will see the dissected data for a packet as soon as TShark sees the
packet and generates that output, rather than seeing it only when
the standard output buffer containing that data fills up.
-L List the data link types supported by the interface and exit. The
reported link types can be used for the -y option.
-n Disable network object name resolution (such as hostname, TCP and
UDP port names); the -N flag might override this one.
-N <name resolving flags>
Turn on name resolving only for particular types of addresses and
port numbers, with name resolving for other types of addresses and
port numbers turned off. This flag overrides -n if both -N and -n
are present. If both -N and -n flags are not present, all name
resolutions are turned on.
The argument is a string that may contain the letters:
d to enable resolution from captured DNS packets
m to enable MAC address resolution
n to enable network address resolution
N to enable using external resolvers (e.g., DNS) for network
address resolution
t to enable transport-layer port number resolution
-o <preference>:<value>
Set a preference value, overriding the default value and any value
read from a preference file. The argument to the option is a
string of the form prefname:value, where prefname is the name of
the preference (which is the same name that would appear in the
preference file), and value is the value to which it should be set.
-O <protocols>
Similar to the -V option, but causes TShark to only show a detailed
view of the comma-separated list of protocols specified, rather
than a detailed view of all protocols. Use the output of "tshark
-G protocols" to find the abbreviations of the protocols you can
specify.
-p Don't put the interface into promiscuous mode. Note that the
interface might be in promiscuous mode for some other reason;
hence, -p cannot be used to ensure that the only traffic that is
captured is traffic sent to or from the machine on which TShark is
running, broadcast traffic, and multicast traffic to addresses
received by that machine.
This option can occur multiple times. If used before the first
occurrence of the -i option, no interface will be put into the
promiscuous mode. If used after an -i option, the interface
specified by the last -i option occurring before this option will
not be put into the promiscuous mode.
-P Decode and display the packet summary, even if writing raw packet
data using the -w option.
-q When capturing packets, don't display the continuous count of
packets captured that is normally shown when saving a capture to a
file; instead, just display, at the end of the capture, a count of
packets captured. On systems that support the SIGINFO signal, such
as various BSDs, you can cause the current count to be displayed by
typing your "status" character (typically control-T, although it
might be set to "disabled" by default on at least some BSDs, so
you'd have to explicitly set it to use it).
When reading a capture file, or when capturing and not saving to a
file, don't print packet information; this is useful if you're
using a -z option to calculate statistics and don't want the packet
information printed, just the statistics.
-Q When capturing packets, only display true errors. This outputs
less than the -q option, so the interface name and total packet
count and the end of a capture are not sent to stderr.
-r <infile>
Read packet data from infile, can be any supported capture file
format (including gzipped files). It is possible to use named
pipes or stdin (-) here but only with certain (not compressed)
capture file formats (in particular: those that can be read without
seeking backwards).
-R <Read filter>
Cause the specified filter (which uses the syntax of read/display
filters, rather than that of capture filters) to be applied during
the first pass of analysis. Packets not matching the filter are not
considered for future passes. Only makes sense with multiple
passes, see -2. For regular filtering on single-pass dissect see -Y
instead.
Note that forward-looking fields such as 'response in frame #'
cannot be used with this filter, since they will not have been
calculate when this filter is applied.
-s <capture snaplen>
Set the default snapshot length to use when capturing live data.
No more than snaplen bytes of each network packet will be read into
memory, or saved to disk. A value of 0 specifies a snapshot length
of 65535, so that the full packet is captured; this is the default.
This option can occur multiple times. If used before the first
occurrence of the -i option, it sets the default snapshot length.
If used after an -i option, it sets the snapshot length for the
interface specified by the last -i option occurring before this
option. If the snapshot length is not set specifically, the
default snapshot length is used if provided.
-S <separator>
Set the line separator to be printed between packets.
-t a|ad|adoy|d|dd|e|r|u|ud|udoy
Set the format of the packet timestamp printed in summary lines.
The format can be one of:
a absolute: The absolute time, as local time in your time zone, is
the actual time the packet was captured, with no date displayed
ad absolute with date: The absolute date, displayed as YYYY-MM-DD,
and time, as local time in your time zone, is the actual time and
date the packet was captured
adoy absolute with date using day of year: The absolute date,
displayed as YYYY/DOY, and time, as local time in your time zone,
is the actual time and date the packet was captured
d delta: The delta time is the time since the previous packet was
captured
dd delta_displayed: The delta_displayed time is the time since the
previous displayed packet was captured
e epoch: The time in seconds since epoch (Jan 1, 1970 00:00:00)
r relative: The relative time is the time elapsed between the first
packet and the current packet
u UTC: The absolute time, as UTC, is the actual time the packet was
captured, with no date displayed
ud UTC with date: The absolute date, displayed as YYYY-MM-DD, and
time, as UTC, is the actual time and date the packet was captured
udoy UTC with date using day of year: The absolute date, displayed
as YYYY/DOY, and time, as UTC, is the actual time and date the
packet was captured
The default format is relative.
-T ek|fields|json|pdml|ps|psml|text
Set the format of the output when viewing decoded packet data. The
options are one of:
ek Newline delimited JSON format for bulk import into
Elasticsearch. It can be used with -j including the JSON filter or
with -x flag to include raw packet data. Example of usage to
import data into Elasticsearch:
tshark -T ek -j "http tcp ip" -x -r file.pcap > file.json
curl -XPUT http://elasticsearch:9200/_bulk --data-binary @file.json
fields The values of fields specified with the -e option, in a form
specified by the -E option. For example,
-T fields -E separator=, -E quote=d
would generate comma-separated values (CSV) output suitable for
importing into your favorite spreadsheet program.
json JSON file format. It can be used with -j including the JSON
filter or with -x flag to influde raw packet data. Example of
usage:
tshark -T json -r file.pcap
tshark -T json -j "http tcp ip" -x -r file.pcap
pdml Packet Details Markup Language, an XML-based format for the
details of a decoded packet. This information is equivalent to the
packet details printed with the -V flag.
ps PostScript for a human-readable one-line summary of each of the
packets, or a multi-line view of the details of each of the
packets, depending on whether the -V flag was specified.
psml Packet Summary Markup Language, an XML-based format for the
summary information of a decoded packet. This information is
equivalent to the information shown in the one-line summary printed
by default.
text Text of a human-readable one-line summary of each of the
packets, or a multi-line view of the details of each of the
packets, depending on whether the -V flag was specified. This is
the default.
-u <seconds type>
Specifies the seconds type. Valid choices are:
s for seconds
hms for hours, minutes and seconds
-U <tap name>
PDUs export, exports PDUs from infile to outfile according to the
tap name given. Use -Y to filter.
Enter an empty tap name "" to get a list of available names.
-v Print the version and exit.
-V Cause TShark to print a view of the packet details.
-w <outfile> | -
Write raw packet data to outfile or to the standard output if
outfile is '-'.
NOTE: -w provides raw packet data, not text. If you want text
output you need to redirect stdout (e.g. using '>'), don't use the
-w option for this.
-W <file format option>
Save extra information in the file if the format supports it. For
example,
-F pcapng -W n
will save host name resolution records along with captured packets.
Future versions of Wireshark may automatically change the capture
format to pcapng as needed.
The argument is a string that may contain the following letter:
n write network address resolution information (pcapng only)
-x Cause TShark to print a hex and ASCII dump of the packet data after
printing the summary and/or details, if either are also being
displayed.
-X <eXtension options>
Specify an option to be passed to a TShark module. The eXtension
option is in the form extension_key:value, where extension_key can
be:
lua_script:lua_script_filename tells TShark to load the given
script in addition to the default Lua scripts.
lua_scriptnum:argument tells TShark to pass the given argument to
the lua script identified by 'num', which is the number indexed
order of the 'lua_script' command. For example, if only one script
was loaded with '-X lua_script:my.lua', then '-X lua_script1:foo'
will pass the string 'foo' to the 'my.lua' script. If two scripts
were loaded, such as '-X lua_script:my.lua' and '-X
lua_script:other.lua' in that order, then a '-X lua_script2:bar'
would pass the string 'bar' to the second lua script, namely
'other.lua'.
read_format:file_format tells TShark to use the given file format
to read in the file (the file given in the -r command option).
Providing no file_format argument, or an invalid one, will produce
a file of available file formats to use.
-y <capture link type>
Set the data link type to use while capturing packets. The values
reported by -L are the values that can be used.
This option can occur multiple times. If used before the first
occurrence of the -i option, it sets the default capture link type.
If used after an -i option, it sets the capture link type for the
interface specified by the last -i option occurring before this
option. If the capture link type is not set specifically, the
default capture link type is used if provided.
-Y <displaY filter>
Cause the specified filter (which uses the syntax of read/display
filters, rather than that of capture filters) to be applied before
printing a decoded form of packets or writing packets to a file.
Packets matching the filter are printed or written to file; packets
that the matching packets depend upon (e.g., fragments), are not
printed but are written to file; packets not matching the filter
nor depended upon are discarded rather than being printed or
written.
Use this instead of -R for filtering using single-pass analysis. If
doing two-pass analysis (see -2) then only packets matching the
read filter (if there is one) will be checked against this filter.
-z <statistics>
Get TShark to collect various types of statistics and display the
result after finishing reading the capture file. Use the -q flag
if you're reading a capture file and only want the statistics
printed, not any per-packet information.
Note that the -z proto option is different - it doesn't cause
statistics to be gathered and printed when the capture is complete,
it modifies the regular packet summary output to include the values
of fields specified with the option. Therefore you must not use
the -q option, as that option would suppress the printing of the
regular packet summary output, and must also not use the -V option,
as that would cause packet detail information rather than packet
summary information to be printed.
Currently implemented statistics are:
-z help
Display all possible values for -z.
-z afp,srt[,filter]
Show Apple Filing Protocol service response time statistics.
-z camel,srt
-z compare,start,stop,ttl[0|1],order[0|1],variance[,filter]
If the optional filter is specified, only those packets that
match the filter will be used in the calculations.
-z conv,type[,filter]
Create a table that lists all conversations that could be seen
in the capture. type specifies the conversation endpoint types
for which we want to generate the statistics; currently the
supported ones are:
"bluetooth" Bluetooth addresses
"eth" Ethernet addresses
"fc" Fibre Channel addresses
"fddi" FDDI addresses
"ip" IPv4 addresses
"ipv6" IPv6 addresses
"ipx" IPX addresses
"jxta" JXTA message addresses
"ncp" NCP connections
"rsvp" RSVP connections
"sctp" SCTP addresses
"tcp" TCP/IP socket pairs Both IPv4 and IPv6 are supported
"tr" Token Ring addresses
"usb" USB addresses
"udp" UDP/IP socket pairs Both IPv4 and IPv6 are supported
"wlan" IEEE 802.11 addresses
If the optional filter is specified, only those packets that
match the filter will be used in the calculations.
The table is presented with one line for each conversation and
displays the number of packets/bytes in each direction as well
as the total number of packets/bytes. The table is sorted
according to the total number of frames.
-z dcerpc,srt,uuid,major.minor[,filter]
Collect call/reply SRT (Service Response Time) data for DCERPC
interface uuid, version major.minor. Data collected is the
number of calls for each procedure, MinSRT, MaxSRT and AvgSRT.
Example: -z dcerpc,srt,12345778-1234-abcd-ef00-0123456789ac,1.0
will collect data for the CIFS SAMR Interface.
This option can be used multiple times on the command line.
If the optional filter is provided, the stats will only be
calculated on those calls that match that filter.
Example:
-z dcerpc,srt,12345778-1234-abcd-ef00-0123456789ac,1.0,ip.addr==1.2.3.4
will collect SAMR SRT statistics for a specific host.
-z bootp,stat[,filter]
Show DHCP (BOOTP) statistics.
-z diameter,avp[,cmd.code,field,field,...]
This option enables extraction of most important diameter
fields from large capture files. Exactly one text line for
each diameter message with matched diameter.cmd.code will be
printed.
Empty diameter command code or '*' can be specified to mach any
diameter.cmd.code
Example: -z diameter,avp extract default field set from
diameter messages.
Example: -z diameter,avp,280 extract default field set from
diameter DWR messages.
Example: -z diameter,avp,272 extract default field set from
diameter CC messages.
Extract most important fields from diameter CC messages:
tshark -r file.cap.gz -q -z
diameter,avp,272,CC-Request-Type,CC-Request-Number,Session-Id,Subscription-Id-Data,Rating-Group,Result-Code
Following fields will be printed out for each diameter message:
"frame" Frame number.
"time" Unix time of the frame arrival.
"src" Source address.
"srcport" Source port.
"dst" Destination address.
"dstport" Destination port.
"proto" Constant string 'diameter', which can be used for post processing of tshark output. E.g. grep/sed/awk.
"msgnr" seq. number of diameter message within the frame. E.g. '2' for the third diameter message in the same frame.
"is_request" '0' if message is a request, '1' if message is an answer.
"cmd" diameter.cmd_code, E.g. '272' for credit control messages.
"req_frame" Number of frame where matched request was found or '0'.
"ans_frame" Number of frame where matched answer was found or '0'.
"resp_time" response time in seconds, '0' in case if matched Request/Answer is not found in trace. E.g. in the begin or end of capture.
-z diameter,avp option is much faster than -V -T text or -T
pdml options.
-z diameter,avp option is more powerful than -T field and -z
proto,colinfo options.
Multiple diameter messages in one frame are supported.
Several fields with same name within one diameter message are
supported, e.g. diameter.Subscription-Id-Data or
diameter.Rating-Group.
Note: tshark -q option is recommended to suppress default
tshark output.
-z dns,tree[,filter]
Create a summary of the captured DNS packets. General
information are collected such as qtype and qclass
distribution. For some data (as qname length or DNS payload)
max, min and average values are also displayed.
-z endpoints,type[,filter]
Create a table that lists all endpoints that could be seen in
the capture. type specifies the endpoint types for which we
want to generate the statistics; currently the supported ones
are:
"bluetooth" Bluetooth addresses
"eth" Ethernet addresses
"fc" Fibre Channel addresses
"fddi" FDDI addresses
"ip" IPv4 addresses
"ipv6" IPv6 addresses
"ipx" IPX addresses
"jxta" JXTA message addresses
"ncp" NCP connections
"rsvp" RSVP connections
"sctp" SCTP addresses
"tcp" TCP/IP socket pairs Both IPv4 and IPv6 are supported
"tr" Token Ring addresses
"usb" USB addresses
"udp" UDP/IP socket pairs Both IPv4 and IPv6 are supported
"wlan" IEEE 802.11 addresses
If the optional filter is specified, only those packets that
match the filter will be used in the calculations.
The table is presented with one line for each conversation and
displays the number of packets/bytes in each direction as well
as the total number of packets/bytes. The table is sorted
according to the total number of frames.
-z expert[,error|,warn|,note|,chat][,filter]
Collects information about all expert info, and will display
them in order, grouped by severity.
Example: -z expert,sip will show expert items of all severity
for frames that match the sip protocol.
This option can be used multiple times on the command line.
If the optional filter is provided, the stats will only be
calculated on those calls that match that filter.
Example: -z "expert,note,tcp" will only collect expert items
for frames that include the tcp protocol, with a severity of
note or higher.
-z follow,prot,mode,filter[,range]
Displays the contents of a TCP or UDP stream between two nodes.
The data sent by the second node is prefixed with a tab to
differentiate it from the data sent by the first node.
prot specifies the transport protocol. It can be one of:
tcp TCP
udp UDP
ssl SSL
mode specifies the output mode. It can be one of:
ascii ASCII output with dots for non-printable characters
ebcdic EBCDIC output with dots for non-printable characters
hex Hexadecimal and ASCII data with offsets
raw Hexadecimal data
Since the output in ascii or ebcdic mode may contain newlines,
the length of each section of output plus a newline precedes
each section of output.
filter specifies the stream to be displayed. UDP/TCP streams
are selected with either the stream index or IP address plus
port pairs. SSL streams are selected with the stream index. For
example:
ip-addr0:port0,ip-addr1:port1
stream-index
range optionally specifies which "chunks" of the stream should
be displayed.
Example: -z "follow,tcp,hex,1" will display the contents of the
second TCP stream (the first is stream 0) in "hex" format.
===================================================================
Follow: tcp,hex
Filter: tcp.stream eq 1
Node 0: 200.57.7.197:32891
Node 1: 200.57.7.198:2906
00000000 00 00 00 22 00 00 00 07 00 0a 85 02 07 e9 00 02 ...".... ........
00000010 07 e9 06 0f 00 0d 00 04 00 00 00 01 00 03 00 06 ........ ........
00000020 1f 00 06 04 00 00 ......
00000000 00 01 00 00 ....
00000026 00 02 00 00
Example: -z
"follow,tcp,ascii,200.57.7.197:32891,200.57.7.198:2906" will
display the contents of a TCP stream between 200.57.7.197 port
32891 and 200.57.7.98 port 2906.
===================================================================
Follow: tcp,ascii
Filter: (omitted for readability)
Node 0: 200.57.7.197:32891
Node 1: 200.57.7.198:2906
38
...".....
................
4
....
-z h225,counter[,filter]
Count ITU-T H.225 messages and their reasons. In the first
column you get a list of H.225 messages and H.225 message
reasons, which occur in the current capture file. The number
of occurrences of each message or reason is displayed in the
second column.
Example: -z h225,counter.
If the optional filter is provided, the stats will only be
calculated on those calls that match that filter. Example: use
-z "h225,counter,ip.addr==1.2.3.4" to only collect stats for
H.225 packets exchanged by the host at IP address 1.2.3.4 .
This option can be used multiple times on the command line.
-z h225,srt[,filter]
Collect requests/response SRT (Service Response Time) data for
ITU-T H.225 RAS. Data collected is number of calls of each
ITU-T H.225 RAS Message Type, Minimum SRT, Maximum SRT, Average
SRT, Minimum in Packet, and Maximum in Packet. You will also
get the number of Open Requests (Unresponded Requests),
Discarded Responses (Responses without matching request) and
Duplicate Messages.
Example: -z h225,srt
This option can be used multiple times on the command line.
If the optional filter is provided, the stats will only be
calculated on those calls that match that filter.
Example: -z "h225,srt,ip.addr==1.2.3.4" will only collect stats
for ITU-T H.225 RAS packets exchanged by the host at IP address
1.2.3.4 .
-z hosts[,ipv4][,ipv6]
Dump any collected IPv4 and/or IPv6 addresses in "hosts"
format. Both IPv4 and IPv6 addresses are dumped by default.
Addresses are collected from a number of sources, including
standard "hosts" files and captured traffic.
-z hpfeeds,tree[,filter]
Calculate statistics for HPFEEDS traffic such as publish per
channel, and opcode distribution.
-z http,stat,
Calculate the HTTP statistics distribution. Displayed values
are the HTTP status codes and the HTTP request methods.
-z http,tree
Calculate the HTTP packet distribution. Displayed values are
the HTTP request modes and the HTTP status codes.
-z http_req,tree
Calculate the HTTP requests by server. Displayed values are the
server name and the URI path.
-z http_srv,tree
Calculate the HTTP requests and responses by server. For the
HTTP requests, displayed values are the server IP address and
server hostname. For the HTTP responses, displayed values are
the server IP address and status.
-z icmp,srt[,filter]
Compute total ICMP echo requests, replies, loss, and percent
loss, as well as minimum, maximum, mean, median and sample
standard deviation SRT statistics typical of what ping
provides.
Example: -z icmp,srt,ip.src==1.2.3.4 will collect ICMP SRT
statistics for ICMP echo request packets originating from a
specific host.
This option can be used multiple times on the command line.
-z icmpv6,srt[,filter]
Compute total ICMPv6 echo requests, replies, loss, and percent
loss, as well as minimum, maximum, mean, median and sample
standard deviation SRT statistics typical of what ping
provides.
Example: -z icmpv6,srt,ipv6.src==fe80::1 will collect ICMPv6
SRT statistics for ICMPv6 echo request packets originating from
a specific host.
This option can be used multiple times on the command line.
-z io,phs[,filter]
Create Protocol Hierarchy Statistics listing both number of
packets and bytes. If no filter is specified the statistics
will be calculated for all packets. If a filter is specified
statistics will only be calculated for those packets that match
the filter.
This option can be used multiple times on the command line.
-z io,stat,interval[,filter][,filter][,filter]...
Collect packet/bytes statistics for the capture in intervals of
interval seconds. Interval can be specified either as a whole
or fractional second and can be specified with microsecond (us)
resolution. If interval is 0, the statistics will be
calculated over all packets.
If no filter is specified the statistics will be calculated for
all packets. If one or more filters are specified statistics
will be calculated for all filters and presented with one
column of statistics for each filter.
This option can be used multiple times on the command line.
Example: -z io,stat,1,ip.addr==1.2.3.4 will generate 1 second
statistics for all traffic to/from host 1.2.3.4.
Example: -z "io,stat,0.001,smb&&ip.addr==1.2.3.4" will generate
1ms statistics for all SMB packets to/from host 1.2.3.4.
The examples above all use the standard syntax for generating
statistics which only calculates the number of packets and
bytes in each interval.
io,stat can also do much more statistics and calculate COUNT(),
SUM(), MIN(), MAX(), AVG() and LOAD() using a slightly
different filter syntax:
-z io,stat,interval,"[COUNT|SUM|MIN|MAX|AVG|LOAD](field)filter"
NOTE: One important thing to note here is that the filter is
not optional and that the field that the calculation is based
on MUST be part of the filter string or the calculation will
fail.
So: -z io,stat,0.010,AVG(smb.time) does not work. Use -z
io,stat,0.010,AVG(smb.time)smb.time instead. Also be aware
that a field can exist multiple times inside the same packet
and will then be counted multiple times in those packets.
NOTE: A second important thing to note is that the system
setting for decimal separator must be set to "."! If it is set
to "," the statistics will not be displayed per filter.
COUNT(field)filter - Calculates the number of times that the
field name (not its value) appears per interval in the filtered
packet list. ''field'' can be any display filter name.
Example: -z io,stat,0.010,"COUNT(smb.sid)smb.sid"
This will count the total number of SIDs seen in each 10ms
interval.
SUM(field)filter - Unlike COUNT, the values of the specified
field are summed per time interval. ''field'' can only be a
named integer, float, double or relative time field.
Example: -z io,stat,0.010,"SUM(frame.len)frame.len"
Reports the total number of bytes that were transmitted
bidirectionally in all the packets within a 10 millisecond
interval.
MIN/MAX/AVG(field)filter - The minimum, maximum, or average
field value in each interval is calculated. The specified
field must be a named integer, float, double or relative time
field. For relative time fields, the output is presented in
seconds with six decimal digits of precision rounded to the
nearest microsecond.
In the following example, the time of the first Read_AndX call,
the last Read_AndX response values are displayed and the
minimum, maximum, and average Read response times (SRTs) are
calculated. NOTE: If the DOS command shell line continuation
character, ''^'' is used, each line cannot end in a comma so it
is placed at the beginning of each continuation line:
tshark -o tcp.desegment_tcp_streams:FALSE -n -q -r smb_reads.cap -z io,stat,0,
"MIN(frame.time_relative)frame.time_relative and smb.cmd==0x2e and smb.flags.response==0",
"MAX(frame.time_relative)frame.time_relative and smb.cmd==0x2e and smb.flags.response==1",
"MIN(smb.time)smb.time and smb.cmd==0x2e",
"MAX(smb.time)smb.time and smb.cmd==0x2e",
"AVG(smb.time)smb.time and smb.cmd==0x2e"
======================================================================================================
IO Statistics
Column #0: MIN(frame.time_relative)frame.time_relative and smb.cmd==0x2e and smb.flags.response==0
Column #1: MAX(frame.time_relative)frame.time_relative and smb.cmd==0x2e and smb.flags.response==1
Column #2: MIN(smb.time)smb.time and smb.cmd==0x2e
Column #3: MAX(smb.time)smb.time and smb.cmd==0x2e
Column #4: AVG(smb.time)smb.time and smb.cmd==0x2e
| Column #0 | Column #1 | Column #2 | Column #3 | Column #4 |
Time | MIN | MAX | MIN | MAX | AVG |
000.000- 0.000000 7.704054 0.000072 0.005539 0.000295
======================================================================================================
The following command displays the average SMB Read response
PDU size, the total number of read PDU bytes, the average SMB
Write request PDU size, and the total number of bytes
transferred in SMB Write PDUs:
tshark -n -q -r smb_reads_writes.cap -z io,stat,0,
"AVG(smb.file.rw.length)smb.file.rw.length and smb.cmd==0x2e and smb.response_to",
"SUM(smb.file.rw.length)smb.file.rw.length and smb.cmd==0x2e and smb.response_to",
"AVG(smb.file.rw.length)smb.file.rw.length and smb.cmd==0x2f and not smb.response_to",
"SUM(smb.file.rw.length)smb.file.rw.length and smb.cmd==0x2f and not smb.response_to"
=====================================================================================
IO Statistics
Column #0: AVG(smb.file.rw.length)smb.file.rw.length and smb.cmd==0x2e and smb.response_to
Column #1: SUM(smb.file.rw.length)smb.file.rw.length and smb.cmd==0x2e and smb.response_to
Column #2: AVG(smb.file.rw.length)smb.file.rw.length and smb.cmd==0x2f and not smb.response_to
Column #3: SUM(smb.file.rw.length)smb.file.rw.length and smb.cmd==0x2f and not smb.response_to
| Column #0 | Column #1 | Column #2 | Column #3 |
Time | AVG | SUM | AVG | SUM |
000.000- 30018 28067522 72 3240
=====================================================================================
LOAD(field)filter - The LOAD/Queue-Depth in each interval is
calculated. The specified field must be a relative time field
that represents a response time. For example smb.time. For
each interval the Queue-Depth for the specified protocol is
calculated.
The following command displays the average SMB LOAD. A value
of 1.0 represents one I/O in flight.
tshark -n -q -r smb_reads_writes.cap
-z "io,stat,0.001,LOAD(smb.time)smb.time"
============================================================================
IO Statistics
Interval: 0.001000 secs
Column #0: LOAD(smb.time)smb.time
| Column #0 |
Time | LOAD |
0000.000000-0000.001000 1.000000
0000.001000-0000.002000 0.741000
0000.002000-0000.003000 0.000000
0000.003000-0000.004000 1.000000
FRAMES | BYTES[()filter] - Displays the total number of frames
or bytes. The filter field is optional but if included it must
be prepended with ''()''.
The following command displays five columns: the total number
of frames and bytes (transferred bidirectionally) using a
single comma, the same two stats using the FRAMES and BYTES
subcommands, the total number of frames containing at least one
SMB Read response, and the total number of bytes transmitted to
the client (unidirectionally) at IP address 10.1.0.64.
tshark -o tcp.desegment_tcp_streams:FALSE -n -q -r smb_reads.cap -z io,stat,0,,FRAMES,BYTES,
"FRAMES()smb.cmd==0x2e and smb.response_to","BYTES()ip.dst==10.1.0.64"
=======================================================================================================================
IO Statistics
Column #0:
Column #1: FRAMES
Column #2: BYTES
Column #3: FRAMES()smb.cmd==0x2e and smb.response_to
Column #4: BYTES()ip.dst==10.1.0.64
| Column #0 | Column #1 | Column #2 | Column #3 | Column #4 |
Time | Frames | Bytes | FRAMES | BYTES | FRAMES | BYTES |
000.000- 33576 29721685 33576 29721685 870 29004801
=======================================================================================================================
-z mac-lte,stat[,filter]
This option will activate a counter for LTE MAC messages. You
will get information about the maximum number of UEs/TTI,
common messages and various counters for each UE that appears
in the log.
Example: -z mac-lte,stat.
This option can be used multiple times on the command line.
If the optional filter is provided, the stats will only be
calculated for those frames that match that filter. Example:
-z "mac-lte,stat,mac-lte.rnti3000"> will only collect stats for
UEs with an assigned RNTI whose value is more than 3000.
-z megaco,rtd[,filter]
Collect requests/response RTD (Response Time Delay) data for
MEGACO. (This is similar to -z smb,srt). Data collected is
the number of calls for each known MEGACO Type, MinRTD, MaxRTD
and AvgRTD. Additionally you get the number of duplicate
requests/responses, unresponded requests, responses, which
don't match with any request. Example: -z megaco,rtd.
If the optional filter is provided, the stats will only be
calculated on those calls that match that filter. Example: -z
"megaco,rtd,ip.addr==1.2.3.4" will only collect stats for
MEGACO packets exchanged by the host at IP address 1.2.3.4 .
This option can be used multiple times on the command line.
-z mgcp,rtd[,filter]
Collect requests/response RTD (Response Time Delay) data for
MGCP. (This is similar to -z smb,srt). Data collected is the
number of calls for each known MGCP Type, MinRTD, MaxRTD and
AvgRTD. Additionally you get the number of duplicate
requests/responses, unresponded requests, responses, which
don't match with any request. Example: -z mgcp,rtd.
This option can be used multiple times on the command line.
If the optional filter is provided, the stats will only be
calculated on those calls that match that filter. Example: -z
"mgcp,rtd,ip.addr==1.2.3.4" will only collect stats for MGCP
packets exchanged by the host at IP address 1.2.3.4 .
-z proto,colinfo,filter,field
Append all field values for the packet to the Info column of
the one-line summary output. This feature can be used to
append arbitrary fields to the Info column in addition to the
normal content of that column. field is the display-filter
name of a field which value should be placed in the Info
column. filter is a filter string that controls for which
packets the field value will be presented in the info column.
field will only be presented in the Info column for the packets
which match filter.
NOTE: In order for TShark to be able to extract the field value
from the packet, field MUST be part of the filter string. If
not, TShark will not be able to extract its value.
For a simple example to add the "nfs.fh.hash" field to the Info
column for all packets containing the "nfs.fh.hash" field, use
-z proto,colinfo,nfs.fh.hash,nfs.fh.hash
To put "nfs.fh.hash" in the Info column but only for packets
coming from host 1.2.3.4 use:
-z "proto,colinfo,nfs.fh.hash && ip.src==1.2.3.4,nfs.fh.hash"
This option can be used multiple times on the command line.
-z rlc-lte,stat[,filter]
This option will activate a counter for LTE RLC messages. You
will get information about common messages and various counters
for each UE that appears in the log.
Example: -z rlc-lte,stat.
This option can be used multiple times on the command line.
If the optional filter is provided, the stats will only be
calculated for those frames that match that filter. Example:
-z "rlc-lte,stat,rlc-lte.ueid3000"> will only collect stats for
UEs with a UEId of more than 3000.
-z rpc,programs
Collect call/reply SRT data for all known ONC-RPC
programs/versions. Data collected is number of calls for each
protocol/version, MinSRT, MaxSRT and AvgSRT. This option can
only be used once on the command line.
-z rpc,srt,program,version[,filter]
Collect call/reply SRT (Service Response Time) data for
program/version. Data collected is the number of calls for
each procedure, MinSRT, MaxSRT, AvgSRT, and the total time
taken for each procedure.
Example: -z rpc,srt,100003,3 will collect data for NFS v3.
This option can be used multiple times on the command line.
If the optional filter is provided, the stats will only be
calculated on those calls that match that filter.
Example: -z rpc,srt,100003,3,nfs.fh.hash==0x12345678 will
collect NFS v3 SRT statistics for a specific file.
-z rtp,streams
Collect statistics for all RTP streams and calculate max.
delta, max. and mean jitter and packet loss percentages.
-z scsi,srt,cmdset[,filter]
Collect call/reply SRT (Service Response Time) data for SCSI
commandset cmdset.
Commandsets are 0:SBC 1:SSC 5:MMC
Data collected is the number of calls for each procedure,
MinSRT, MaxSRT and AvgSRT.
Example: -z scsi,srt,0 will collect data for SCSI BLOCK
COMMANDS (SBC).
This option can be used multiple times on the command line.
If the optional filter is provided, the stats will only be
calculated on those calls that match that filter.
Example: -z scsi,srt,0,ip.addr==1.2.3.4 will collect SCSI SBC
SRT statistics for a specific iscsi/ifcp/fcip host.
-z sip,stat[,filter]
This option will activate a counter for SIP messages. You will
get the number of occurrences of each SIP Method and of each
SIP Status-Code. Additionally you also get the number of
resent SIP Messages (only for SIP over UDP).
Example: -z sip,stat.
This option can be used multiple times on the command line.
If the optional filter is provided, the stats will only be
calculated on those calls that match that filter. Example: -z
"sip,stat,ip.addr==1.2.3.4" will only collect stats for SIP
packets exchanged by the host at IP address 1.2.3.4 .
-z smb,sids
When this feature is used TShark will print a report with all
the discovered SID and account name mappings. Only those SIDs
where the account name is known will be presented in the table.
For this feature to work you will need to either to enable
"Edit/Preferences/Protocols/SMB/Snoop SID to name mappings" in
the preferences or you can override the preferences by
specifying -o "smb.sid_name_snooping:TRUE" on the TShark
command line.
The current method used by TShark to find the SID->name mapping
is relatively restricted with a hope of future expansion.
-z smb,srt[,filter]
Collect call/reply SRT (Service Response Time) data for SMB.
Data collected is number of calls for each SMB command, MinSRT,
MaxSRT and AvgSRT.
Example: -z smb,srt
The data will be presented as separate tables for all normal
SMB commands, all Transaction2 commands and all NT Transaction
commands. Only those commands that are seen in the capture
will have its stats displayed. Only the first command in a
xAndX command chain will be used in the calculation. So for
common SessionSetupAndX + TreeConnectAndX chains, only the
SessionSetupAndX call will be used in the statistics. This is
a flaw that might be fixed in the future.
This option can be used multiple times on the command line.
If the optional filter is provided, the stats will only be
calculated on those calls that match that filter.
Example: -z "smb,srt,ip.addr==1.2.3.4" will only collect stats
for SMB packets exchanged by the host at IP address 1.2.3.4 .
--capture-comment <comment>
Add a capture comment to the output file.
This option is only available if a new output file in pcapng
format is created. Only one capture comment may be set per
output file.
--disable-protocol <proto_name>
Disable dissection of proto_name.
--enable-heuristic <short_name>
Enable dissection of heuristic protocol.
--disable-heuristic <short_name>
Disable dissection of heuristic protocol.
CAPTURE FILTER SYNTAX
See the manual page of pcap-filter(7) or, if that doesn't exist, tcpdump(8), or, if that doesn't exist, <https://wiki.wireshark.org/CaptureFilters>.
READ FILTER SYNTAX
For a complete table of protocol and protocol fields that are filterable in TShark see the wireshark-filter(4) manual page.
FILES
These files contains various Wireshark configuration values.
Preferences
The preferences files contain global (system-wide) and personal
preference settings. If the system-wide preference file exists, it
is read first, overriding the default settings. If the personal
preferences file exists, it is read next, overriding any previous
values. Note: If the command line option -o is used (possibly more
than once), it will in turn override values from the preferences
files.
The preferences settings are in the form prefname:value, one per
line, where prefname is the name of the preference and value is the
value to which it should be set; white space is allowed between :
and value. A preference setting can be continued on subsequent
lines by indenting the continuation lines with white space. A #
character starts a comment that runs to the end of the line:
# Capture in promiscuous mode?
# TRUE or FALSE (case-insensitive).
capture.prom_mode: TRUE
The global preferences file is looked for in the wireshark
directory under the share subdirectory of the main installation
directory (for example, /usr/local/share/wireshark/preferences) on
UNIX-compatible systems, and in the main installation directory
(for example, C:\Program Files\Wireshark\preferences) on Windows
systems.
The personal preferences file is looked for in
$HOME/.wireshark/preferences on UNIX-compatible systems and
%APPDATA%\Wireshark\preferences (or, if %APPDATA% isn't defined,
%USERPROFILE%\Application Data\Wireshark\preferences) on Windows
systems.
Disabled (Enabled) Protocols
The disabled_protos files contain system-wide and personal lists of
protocols that have been disabled, so that their dissectors are
never called. The files contain protocol names, one per line,
where the protocol name is the same name that would be used in a
display filter for the protocol:
http
tcp # a comment
The global disabled_protos file uses the same directory as the
global preferences file.
The personal disabled_protos file uses the same directory as the
personal preferences file.
Name Resolution (hosts)
If the personal hosts file exists, it is used to resolve IPv4 and
IPv6 addresses before any other attempts are made to resolve them.
The file has the standard hosts file syntax; each line contains one
IP address and name, separated by whitespace. The same directory
as for the personal preferences file is used.
Capture filter name resolution is handled by libpcap on UNIX-
compatible systems and WinPcap on Windows. As such the Wireshark
personal hosts file will not be consulted for capture filter name
resolution.
Name Resolution (subnets)
If an IPv4 address cannot be translated via name resolution (no
exact match is found) then a partial match is attempted via the
subnets file.
Each line of this file consists of an IPv4 address, a subnet mask
length separated only by a / and a name separated by whitespace.
While the address must be a full IPv4 address, any values beyond
the mask length are subsequently ignored.
An example is:
# Comments must be prepended by the # sign! 192.168.0.0/24
ws_test_network
A partially matched name will be printed as
"subnet-name.remaining-address". For example, "192.168.0.1" under
the subnet above would be printed as "ws_test_network.1"; if the
mask length above had been 16 rather than 24, the printed address
would be ``ws_test_network.0.1".
Name Resolution (ethers)
The ethers files are consulted to correlate 6-byte hardware
addresses to names. First the personal ethers file is tried and if
an address is not found there the global ethers file is tried next.
Each line contains one hardware address and name, separated by
whitespace. The digits of the hardware address are separated by
colons (:), dashes (-) or periods (.). The same separator
character must be used consistently in an address. The following
three lines are valid lines of an ethers file:
ff:ff:ff:ff:ff:ff Broadcast
c0-00-ff-ff-ff-ff TR_broadcast
00.00.00.00.00.00 Zero_broadcast
The global ethers file is looked for in the /etc directory on UNIX-
compatible systems, and in the main installation directory (for
example, C:\Program Files\Wireshark) on Windows systems.
The personal ethers file is looked for in the same directory as the
personal preferences file.
Capture filter name resolution is handled by libpcap on UNIX-
compatible systems and WinPcap on Windows. As such the Wireshark
personal ethers file will not be consulted for capture filter name
resolution.
Name Resolution (manuf)
The manuf file is used to match the 3-byte vendor portion of a
6-byte hardware address with the manufacturer's name; it can also
contain well-known MAC addresses and address ranges specified with
a netmask. The format of the file is the same as the ethers files,
except that entries of the form:
00:00:0C Cisco
can be provided, with the 3-byte OUI and the name for a vendor, and
entries such as:
00-00-0C-07-AC/40 All-HSRP-routers
can be specified, with a MAC address and a mask indicating how many
bits of the address must match. The above entry, for example, has
40 significant bits, or 5 bytes, and would match addresses from
00-00-0C-07-AC-00 through 00-00-0C-07-AC-FF. The mask need not be
a multiple of 8.
The manuf file is looked for in the same directory as the global
preferences file.
Name Resolution (services)
The services file is used to translate port numbers into names.
The file has the standard services file syntax; each line contains
one (service) name and one transport identifier separated by white
space. The transport identifier includes one port number and one
transport protocol name (typically tcp, udp, or sctp) separated by
a /.
An example is:
mydns 5045/udp # My own Domain Name Server mydns
5045/tcp # My own Domain Name Server
Name Resolution (ipxnets)
The ipxnets files are used to correlate 4-byte IPX network numbers
to names. First the global ipxnets file is tried and if that
address is not found there the personal one is tried next.
The format is the same as the ethers file, except that each address
is four bytes instead of six. Additionally, the address can be
represented as a single hexadecimal number, as is more common in
the IPX world, rather than four hex octets. For example, these
four lines are valid lines of an ipxnets file:
C0.A8.2C.00 HR
c0-a8-1c-00 CEO
00:00:BE:EF IT_Server1
110f FileServer3
The global ipxnets file is looked for in the /etc directory on
UNIX-compatible systems, and in the main installation directory
(for example, C:\Program Files\Wireshark) on Windows systems.
The personal ipxnets file is looked for in the same directory as
the personal preferences file.
OUTPUT
TShark uses UTF-8 to represent strings internally. In some cases the output might not be valid. For example, a dissector might generate invalid UTF-8 character sequences. Programs reading TShark output should expect UTF-8 and be prepared for invalid output. If TShark detects that it is writing to a TTY on UNIX or Linux and the locale does not support UTF-8, output will be re-encoded to match the current locale. If TShark detects that it is writing to a TTY on Windows, output will be encoded as UTF-16LE.
ENVIRONMENT VARIABLES
WIRESHARK_APPDATA
On Windows, Wireshark normally stores all application data in
%APPDATA% or %USERPROFILE%. You can override the default location
by exporting this environment variable to specify an alternate
location.
WIRESHARK_DEBUG_WMEM_OVERRIDE
Setting this environment variable forces the wmem framework to use
the specified allocator backend for *all* allocations, regardless
of which backend is normally specified by the code. This is mainly
useful to developers when testing or debugging. See README.wmem in
the source distribution for details.
WIRESHARK_RUN_FROM_BUILD_DIRECTORY
This environment variable causes the plugins and other data files
to be loaded from the build directory (where the program was
compiled) rather than from the standard locations. It has no
effect when the program in question is running with root (or
setuid) permissions on *NIX.
WIRESHARK_DATA_DIR
This environment variable causes the various data files to be
loaded from a directory other than the standard locations. It has
no effect when the program in question is running with root (or
setuid) permissions on *NIX.
ERF_RECORDS_TO_CHECK
This environment variable controls the number of ERF records
checked when deciding if a file really is in the ERF format.
Setting this environment variable a number higher than the default
(20) would make false positives less likely.
IPFIX_RECORDS_TO_CHECK
This environment variable controls the number of IPFIX records
checked when deciding if a file really is in the IPFIX format.
Setting this environment variable a number higher than the default
(20) would make false positives less likely.
WIRESHARK_ABORT_ON_DISSECTOR_BUG
If this environment variable is set, TShark will call abort(3) when
a dissector bug is encountered. abort(3) will cause the program to
exit abnormally; if you are running TShark in a debugger, it should
halt in the debugger and allow inspection of the process, and, if
you are not running it in a debugger, it will, on some OSes,
assuming your environment is configured correctly, generate a core
dump file. This can be useful to developers attempting to
troubleshoot a problem with a protocol dissector.
WIRESHARK_ABORT_ON_TOO_MANY_ITEMS
If this environment variable is set, TShark will call abort(3) if a
dissector tries to add too many items to a tree (generally this is
an indication of the dissector not breaking out of a loop soon
enough). abort(3) will cause the program to exit abnormally; if
you are running TShark in a debugger, it should halt in the
debugger and allow inspection of the process, and, if you are not
running it in a debugger, it will, on some OSes, assuming your
environment is configured correctly, generate a core dump file.
This can be useful to developers attempting to troubleshoot a
problem with a protocol dissector.
SEE ALSO
wireshark-filter(4), wireshark(1), editcap(1), pcap(3), dumpcap(1), text2pcap(1), mergecap(1), pcap-filter(7) or tcpdump(8)
NOTES
TShark is part of the Wireshark distribution. The latest version of Wireshark can be found at <https://www.wireshark.org>. HTML versions of the Wireshark project man pages are available at: <https://www.wireshark.org/docs/man-pages>.
AUTHORS
TShark uses the same packet dissection code that Wireshark does, as well as using many other modules from Wireshark; see the list of authors in the Wireshark man page for a list of authors of that code.
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