Provided by: tshark_3.2.3-1_amd64 
NAME
tshark - Dump and analyze network traffic
SYNOPSIS
tshark [ -i <capture interface>|- ] [ -f <capture filter> ] [ -2 ] [ -r <infile> ] [ -w <outfile>|- ]
[ options ] [ <filter> ]
tshark -G [ <report type> ] [ --elastic-mapping-filter <protocols> ]
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 pcapng format,
which is also the format used by wireshark 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 the standard output for
each received packet.
When run with the -r option, specifying a capture file from which to read, TShark will again work much
like tcpdump, reading packets from the file and displaying a summary line on the standard output for each
packet read. 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 when compiling TShark, it will be possible to compile it, but the resulting program will be
unable to read compressed files.
When displaying packets on the standard output, 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 instead
writes 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 details for the protocols specified, and show only
the top-level detail line for all other protocols. Use the output of "tshark -G protocols" to find the
abbreviations of the protocols you can specify. If the -P option is specified with either the -V or -O
options, both the summary line for the entire packet and the details will be displayed.
Packet capturing is performed with the pcap library. That library supports specifying a filter
expression; packets that don't match that filter are discarded. The -f option is used to specify a
capture filter. The syntax of a capture filter is defined by the pcap library; this syntax is different
from the read filter syntax described below, and the filtering mechanism is limited in its abilities.
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. Read filters use the same syntax as display and color filters in
Wireshark; a read filter is specified with the -R option.
Read filters can be specified when capturing or when reading from a capture file. Note that 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, so you might be more likely to lose
packets if you're using a read filter.
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. 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).
If the -w option is specified when capturing packets or reading from a capture file, TShark does not
display packets on the standard output. Instead, it writes the packets to a capture file with the name
specified by the -w option.
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).
If you want the packets to be displayed to the standard output and also saved to a file, specify the -P
option in addition to the -w option to have the summary line displayed, specify the -V option in addition
to the -w option to have the details of the packet displayed, and specify the -O option, with a list of
protocols, to have the full details of the specified protocols and the top-level detail line for all
other protocols to be displayed. If the -P option is used together with the -V or -O option, the summary
line will be displayed along with the detail lines.
When writing packets to a file, TShark, by default, writes the file in pcapng 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 option without a value.
However, you can't specify a file format for a live capture.
When capturing packets, TShark writes to the standard error an initial line listing the interfaces from
which packets are being captured and, if packet information isn't being displayed to the terminal, writes
a continuous count of packets captured to the standard output. If the -q option is specified, neither
the continuous count nor the packet information will be displayed; instead, at the end of the capture, a
count of packets captured will be displayed. If the -Q option is specified, neither the initial line,
nor the packet information, nor any packet counts will be displayed. If the -q or -Q option is used, the
-P, -V, or -O option can be used to cause the corresponding output to be displayed even though other
output is suppressed.
When reading packets, the -q and -Q option will suppress the display of the packet summary or details;
this would be used if -z options are specified in order to display statistics, so that only the
statistics, not the packet information, is displayed.
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|--autostop <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. Floating point values
(e.g. 0.5) are allowed.
files:value Stop writing to capture files after value number of files were written.
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.
packets:value switch to the next file after it contains value packets. Same as -c<capture packet
count>.
-b|--ring-buffer <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_20200714120117.pcap,
outfile_00002_20200714120523.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. Floating point values (e.g. 0.5) are allowed.
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, interval 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.
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.
interval:value switch to the next file when the time is an exact multiple of value seconds. For
example, use 3600 to switch to a new file every hour on the hour.
packets:value switch to the next file after it contains value packets.
Example: tshark -b filesize:1000 -b files:5 results in a ring buffer of five files of size one
megabyte each.
-B|--buffer-size <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. Same as -a packets:<capture
packet count>. 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: tshark -d tcp.port==8888,http will decode any traffic running over TCP port 8888 as HTTP.
Example: tshark -d tcp.port==8888:3,http will decode any traffic running over TCP ports 8888, 8889 or
8890 as HTTP.
Example: tshark -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: tshark -d . is a quick way to get a list of valid selectors.
Example: tshark -d ethertype==0x0800. is a quick way to get a list of protocols that can be selected
with an ethertype.
-D|--list-interfaces
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 (UNIX systems lacking ifconfig
-a or Linux systems lacking ip link show). The number can be useful on Windows systems, where the
interface name might be a long name or a GUID.
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: tshark -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: tshark -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. Using the
report type of help lists all the current report types.
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)
* Field 5 = protocol name
* Field 6 = "decode as" support
elastic-mapping Dumps the ElasticSearch mapping file to stdout.
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
folders Dumps various folders used by tshark. This is essentially the same data reported in
Wireshark's About | Folders tab. There is one record per line. The fields are tab-delimited.
* Field 1 = Folder type (e.g "Personal configuration:")
* Field 2 = Folder location (e.g. "/home/vagrant/.config/wireshark/")
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")
help Displays the available report types.
plugins Dumps the plugins currently installed. There is one record per line. The fields are tab-
delimited.
* Field 1 = plugin library/Lua script/extcap executable (e.g. "gryphon.so")
* Field 2 = plugin version (e.g. 0.0.4)
* Field 3 = plugin type ("dissector", "tap", "file type", etc.)
* 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|--help
Print the version and options and exit.
-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 <https://en.wikipedia.org/wiki/Hosts_(file)>.
-i|--interface <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", "ifconfig
-a" or "ip link" 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. On Windows systems, pipe names must be of the form "\\pipe\.\pipename". Data read from pipes
must be in standard pcapng or pcap format. Pcapng data must have the same endianness as the capturing
host.
This option can occur multiple times. When capturing from multiple interfaces, the capture file will
be saved in pcapng format.
-I|--monitor-mode
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|jsonraw|pdml output file types. Only the protocol's parent
node is included. Child nodes are only included if explicitly specified in the filter.
Example: tshark -j "ip ip.flags http"
-J <protocol match filter>
Protocol top level filter used for ek|json|jsonraw|pdml output file types. The protocol's parent
node and all child nodes are included. Lower-level protocols must be explicitly specified in the
filter.
Example: tshark -J "tcp http"
-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: tshark -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-data-link-types
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 option
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 option overrides -n if both -N and -n
are present. If both -N and -n options 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
v to enable VLAN IDs to names 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, and show only the top-level detail line for all other protocols, 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|--no-promiscuous-mode
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|--print
Decode and display the packet summary or details, even if writing raw packet data using the -w
option, and even if packet output is otherwise suppressed with -Q.
-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, don't display, on the standard error, the initial message indicating on which
interfaces the capture is being done, the continuous count of packets captured shown when saving a
capture to a file, and the final message giving the count of packets captured. Only true errors are
displayed on the standard error.
only display true errors; don't display the initial message indicating the. 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.
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.
-r|--read-file <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 <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|--snapshot-length <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 262144, 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|jsonraw|pdml|ps|psml|tabs|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 or -J to
specify which protocols to include or with -x to include raw hex-encoded packet data. If -P is
specified it will print the packet summary only, with both -P and -V it will print the packet summary
and packet details. If neither -P or -V are used it will print the packet details only. Example of
usage to import data into Elasticsearch:
tshark -T ek -j "http tcp ip" -P -V -x -r file.pcap > file.json
curl -H "Content-Type: application/x-ndjson" -XPOST http://elasticsearch:9200/_bulk --data-binary "@file.json"
Elastic requires a mapping file to be loaded as template for packets-* index in order to convert
wireshark types to elastic types. This file can be auto-generated with the command "tshark -G
elastic-mapping". Since the mapping file can be huge, protocols can be selected by using the option
--elastic-mapping-filter:
tshark -G elastic-mapping --elastic-mapping-filter ip,udp,dns
fields The values of fields specified with the -e option, in a form specified by the -E option. For
example,
tshark -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 or -J to specify which protocols to include or with -x
option to include raw hex-encoded packet data. Example of usage:
tshark -T json -r file.pcap
tshark -T json -j "http tcp ip" -x -r file.pcap
jsonraw JSON file format including only raw hex-encoded packet data. It can be used with -j or -J to
specify which protocols to include. Example of usage:
tshark -T jsonraw -r file.pcap
tshark -T jsonraw -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 option. Using the --color option
will add color attributes to pdml output. These attributes are nonstandard.
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 option 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. Using the --color option will add color attributes to pdml output. These attributes are
nonstandard.
tabs Similar to the default text report except the human-readable one-line summary of each packet
will include an ASCII horizontal tab (0x09) character as a delimiter between each column.
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 option 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|--version
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,
tshark -F pcapng -W n
will save host name resolution records along with captured packets.
Future versions of Tshark 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|--linktype <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 <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.
-M <auto session reset>
Automatically reset internal session when reached to specified number of packets. for example,
tshark -M 100000
will reset session every 100000 packets.
This feature does not support -2 two-pass analysis
-z <statistics>
Get TShark to collect various types of statistics and display the result after finishing reading the
capture file. Use the -q option 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 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|,comment][,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 flow,name,mode,[filter]
Displays the flow of data between two nodes. Output is the same as ASCII format saved from GUI.
name specifies the flow name. It can be one of:
any All frames
icmp ICMP
icmpv6 ICMPv6
lbm_uim UIM
tcp TCP
mode specifies the address type. It can be one of:
standard Any address
network Network address
Example: -z flow,tcp,network will show data flow for all TCP frames
-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
tls TLS or SSL
http2 HTTP/2 streams
quic QUIC streams
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. TLS streams are selected with the stream index. HTTP/2
streams are selected by combination of UDP/TCP and HTTP/2 streams indices. For example:
ip-addr0:port0,ip-addr1:port1
stream-index
stream-index,substream-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
....
Example: -z "follow,http2,hex,0,1" will display the contents of a HTTP/2 stream on the first TCP
session (index 0) with HTTP/2 Stream ID 1.
===================================================================
Follow: http2,hex
Filter: tcp.stream eq 0 and http2.streamid eq 1
Node 0: 172.16.5.1:49178
Node 1: 172.16.5.10:8443
00000000 00 00 2c 01 05 00 00 00 01 82 04 8b 63 c1 ac 2a ..,..... ....c..*
00000010 27 1d 9d 57 ae a9 bf 87 41 8c 0b a2 5c 2e 2e da '..W.... A...\...
00000020 e1 05 c7 9a 69 9f 7a 88 25 b6 50 c3 ab b6 25 c3 ....i.z. %.P...%.
00000030 53 03 2a 2f 2a S.*/*
00000000 00 00 22 01 04 00 00 00 01 88 5f 87 35 23 98 ac .."..... .._.5#..
00000010 57 54 df 61 96 c3 61 be 94 03 8a 61 2c 6a 08 2f WT.a..a. ...a,j./
00000020 34 a0 5b b8 21 5c 0b ea 62 d1 bf 4.[.!\.. b..
0000002B 00 40 00 00 00 00 00 00 01 89 50 4e 47 0d 0a 1a .@...... ..PNG...
QUIC streams can be selected through -z "follow,quic,hex,3,0", the first number indicates the UDP
stream index whereas the second number selects the QUIC Stream ID.
-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: tshark -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[,ip][,ipv4][,ipv6]
Dump any collected IPv4 and/or IPv6 addresses in "hosts" format. Both IPv4 and IPv6 addresses
are dumped by default. "ip" argument will dump only ipv4 addresses.
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_ref,tree
Calculate the HTTP requests by referer. Displayed values are the referring URI.
-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: tshark -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: tshark -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 credentials
Collect credentials (username/passwords) from packets. The report includes the packet number, the
protocol that had that credential, the username and the password. For protocols just using one
sigle field as authentication, this is provided as a password and a placeholder in place of the
user.
-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: tshark -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: tshark -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.
--list-time-stamp-types
List time stamp types supported for the interface. If no time stamp type can be set, no time stamp
types are listed.
--time-stamp-type <type>
Change the interface's timestamp method.
--color
Enable coloring of packets according to standard Wireshark color filters. On Windows colors are
limited to the standard console character attribute colors. Other platforms require a terminal that
handles 24-bit "true color" terminal escape sequences. See <https://wiki.wireshark.org/ColoringRules>
for more information on configuring color filters.
--no-duplicate-keys
If a key appears multiple times in an object, only write it a single time with as value a json array
containing all the separate values. (Only works with -T json)
--elastic-mapping-filter <protocol>,<protocol>,...
When generating the ElasticSearch mapping file, only put the specified protocols in it, to avoid a
huge mapping file that can choke some software (such as Kibana). The option takes a list of wanted
protocol abbreviations, separated by comma.
Example: ip,udp,dns puts only those three protocols in the mapping file.
--export-objects <protocol>,<destdir>
Export all objects within a protocol into directory destdir. The available values for protocol can be
listed with --export-objects help.
The objects are directly saved in the given directory. Filenames are dependent on the dissector, but
typically it is named after the basename of a file. Duplicate files are not overwritten, instead an
increasing number is appended before the file extension.
This interface is subject to change, adding the possibility to filter on files.
--enable-protocol <proto_name>
Enable dissection of proto_name.
--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 $XDG_CONFIG_HOME/wireshark/preferences (or, if
$XDG_CONFIG_HOME/wireshark does not exist while $HOME/.wireshark is present,
$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 Npcap or 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 Npcap or 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_CONFIG_DIR
This environment variable overrides the location of personal configuration files. It defaults to
$XDG_CONFIG_HOME/wireshark (or $HOME/.wireshark if the former is missing while the latter exists). On
Windows, %APPDATA%\Wireshark is used instead. Available since Wireshark 3.0.
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.