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= wireshark(1)
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== NAME

wireshark - Interactively dump and analyze network traffic

== SYNOPSIS

[manarg]
*wireshark*
[ *-i* <capture interface>|- ]
[ *-f* <capture filter> ]
[ *-Y* <display filter> ]
[ *-w* <outfile> ]
[ *options* ]
[ <infile> ]

[manarg]
*wireshark*
*-h|--help*

[manarg]
*wireshark*
*-v|--version*

== DESCRIPTION

*Wireshark* is a GUI network protocol analyzer.  It lets you
interactively browse packet data from a live network or from a
previously saved capture file.  *Wireshark*'s native capture file
formats are *pcapng* format and *pcap* format; it can read and write
both formats..  *pcap* format is also the format used by *tcpdump* and
various other tools; *tcpdump*, when using newer versions of the
*libpcap* library, can also read some pcapng files, and, on newer
versions of macOS, can read all pcapng files and can write them as well.

*Wireshark* can also read / import the following file formats:

* Oracle (previously Sun) *snoop* and *atmsnoop* captures

* Finisar (previously Shomiti) *Surveyor* captures

* Microsoft *Network Monitor* captures

* Novell *LANalyzer* captures

* AIX's *iptrace* captures

* Cinco Networks *NetXRay* captures

* NETSCOUT (previously Network Associates/Network General) Windows-based
*Sniffer* captures

* Network General/Network Associates DOS-based *Sniffer* captures
(compressed or uncompressed)

* LiveAction (previously WildPackets/Savvius) **Peek*/*EtherHelp*/*PacketGrabber* captures

* *RADCOM*'s WAN/LAN analyzer captures

* Viavi (previously Network Instruments) *Observer* captures

* *Lucent/Ascend* router debug output

* captures from HP-UX *nettl*

* *Toshiba's* ISDN routers dump output

* the output from *i4btrace* from the ISDN4BSD project

* traces from the *EyeSDN* USB S0

* the *IPLog* format output from the Cisco Secure Intrusion Detection System

* *pppd logs* (pppdump format)

* the output from VMS's *TCPIPtrace*/*TCPtrace*/*UCX$TRACE* utilities

* the text output from the *DBS Etherwatch* VMS utility

* Visual Networks' *Visual UpTime* traffic capture

* the output from *CoSine* L2 debug

* the output from InfoVista (previously Accellent) *5View* LAN agents

* Endace Measurement Systems' ERF format captures

* Linux Bluez Bluetooth stack *hcidump -w* traces

* Catapult DCT2000 .out files

* Gammu generated text output from Nokia DCT3 phones in Netmonitor mode

* IBM Series (OS/400) Comm traces (ASCII & UNICODE)

* Juniper Netscreen snoop files

* Symbian OS btsnoop files

* TamoSoft CommView files

* Tektronix K12xx 32bit .rf5 format files

* Tektronix K12 text file format captures

* Apple PacketLogger files

* Captures from Aethra Telecommunications' PC108 software for their test
instruments

* Citrix NetScaler Trace files

* Android Logcat binary and text format logs

* Colasoft Capsa and PacketBuilder captures

* Micropross mplog files

* Unigraf DPA-400 DisplayPort AUX channel monitor traces

* 802.15.4 traces from Daintree's Sensor Network Analyzer

* MPEG-2 Transport Streams as defined in ISO/IEC 13818-1

* Log files from the _candump_ utility

* Logs from the BUSMASTER tool

* Ixia IxVeriWave raw captures

* Rabbit Labs CAM Inspector files

*  _systemd_ journal files

* 3GPP TS 32.423 trace files

There is no need to tell *Wireshark* what type of
file you are reading; it will determine the file type by itself.
*Wireshark* is also capable of reading any of these file formats if they
are compressed using gzip, LZ4, or Zstandard, if compiled with the
appropriate support.  *Wireshark* recognizes this directly from the file;
the '.gz' or other extension is not required for this purpose.

Like other protocol analyzers, *Wireshark*'s main window shows 3 views
of a packet.  It shows a summary line, briefly describing what the
packet is.  A packet details display is shown, allowing you to drill
down to exact protocol or field that you interested in.  Finally, a hex
dump shows you exactly what the packet looks like when it goes over the
wire.

In addition, *Wireshark* has some features that make it unique.  It can
assemble all the packets in a TCP conversation and show you the ASCII
(or EBCDIC, or hex) data in that conversation.  Display filters in
*Wireshark* are very powerful; more fields are filterable in *Wireshark*
than in other protocol analyzers, and the syntax you can use to create
your filters is richer.  As *Wireshark* progresses, expect more and more
protocol fields to be allowed in display 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 display filter syntax.

Compressed file support uses (and therefore requires) the zlib library.
If the zlib library is not present, *Wireshark* will compile, but will
be unable to read compressed files.

The pathname of a capture file to be read can be specified with the
*-r* option or can be specified as a command-line argument.

== OPTIONS

Most users will want to start *Wireshark* without options and configure
it from the menus instead.  Those users may just skip this section.

-a|--autostop  <capture autostop condition>::
+
--
Specify a criterion that specifies when *Wireshark* 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, Wireshark
will stop writing to the current capture file and switch to the next one if
filesize is reached.  Note that the filesize is limited to a maximum value of
2 TB, although you might have problems viewing the file in the GUI before then if
the number of packets exceeds 2^31^ (2147483648).

*packets*:__value__ Stop writing to a capture file after it contains __value__
packets. Acts the same as *-c*<capture packet count>.
--

-b|--ring-buffer  <capture ring buffer option>::
+
--
Cause *Wireshark* to run in "multiple files" mode.  In "multiple files" mode,
*Wireshark* will write to several capture files.  When the first capture file
fills up, *Wireshark* will switch writing to the next file and so on.

The created filenames are based on the filename given with the *-w* flag,
the number of the file and on the creation date and time,
e.g. outfile_00001_20250714120117.pcap, outfile_00002_20250714120523.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 *Wireshark* 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 one of the other criteria 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 criteria, 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 TB,
although you might have problems viewing the file in the GUI before then if
the number of packets exceeds 2^31^ (2147483648).

*interval*:__value__ switch to the next file when the time is an exact
multiple of __value__ seconds.

*packets*:__value__ switch to the next file after it contains __value__
packets.

Example: *-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 *Wireshark* 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-compatible systems, such as Linux, macOS,
\*BSD, Solaris, and AIX, with libpcap 1.0.0 or later, and on Windows.
It is not available on UNIX-compatible 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. Acts the same as *-a packets:*<capture packet count>.
--

-C  <configuration profile>::
+
--
Start with the given configuration profile.
--

--capture-comment <comment>::
+
--
When performing a capture file from the command line, with the *-k*
flag, add a capture comment to the output file, if supported by the
capture format.

This option may be specified multiple times.  Note that Wireshark
currently only displays the first comment of a capture file.
--

-D|--list-interfaces::
+
--
Print a list of the interfaces on which *Wireshark* 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* flag to
specify an interface on which to capture.  The number can be useful on
Windows systems, where the interfaces have long names that usually
contain a GUID.
--

--display <X display to use>::
+
--
Specifies the X display to use.  A hostname and screen (otherhost:0.0)
or just a screen (:0.0) can be specified.  This option is not available
under macOS or Windows.
--

-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>::
When performing a capture file from the command line, with the *-k* option,
set the file format of the output capture file written using the *-w* option.
In situations that require the *pcapng* format, such as capturing from
multiple interfaces, this option will be overridden. The option *-F*
without a value will list the available formats. The default is the
*pcapng* format (unless the default has been changed in preferences.)

This does not support every format to which Wireshark can convert a file;
this is intentional for security reasons. Capture in a supported format and
then save the file in a different format if so desired.

--fullscreen::
+
--
Start Wireshark in full screen mode (kiosk mode). To exit from fullscreen mode,
open the View menu and select the Full Screen option. Alternatively, press the
F11 key (or Ctrl + Cmd + F for macOS).
--

-g  <packet number>::
After reading in a capture file using the *-r* flag, go to the given __packet number__.

-h|--help::
Print the version number and options and exit.

-H::
Hide the capture info dialog during live packet capture.

-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 "*wireshark
-D*" (described above); a number, as reported by "*tshark -D*", can also
be used.

If no interface is specified, *Wireshark* 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,
*Wireshark* 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.

"TCP@<host>:<port>" causes *Wireshark* to attempt to connect to the
specified port on the specified host and read pcapng or pcap data.

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::
Use after *-J* to change the behavior when no exact match is found for
the filter.  With this option select the first packet before.

-J  <jump filter>::
+
--
After reading in a capture file using the *-r* flag, jump to the packet
matching the filter (display filter syntax).  If no exact match is found
the first packet after that is selected.
--

-k::
+
--
Start the capture session immediately.  If the *-i* flag was
specified, the capture uses the specified interface.  Otherwise,
*Wireshark* 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, *Wireshark* reports an error and
doesn't start the capture.
--

-l::
Turn on automatic scrolling if the packet display is being updated
automatically as packets arrive during a capture (as specified by the
*-S* flag).

-L|--list-data-link-types::
List the data link types supported by the interface and exit.

--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.

-o  <preference/recent setting>::
+
--
Set a preference or recent value, overriding the default value and any value
read from a preference/recent file.  The argument to the flag is a string of
the form __prefname:value__, where __prefname__ is the name of the
preference/recent value (which is the same name that would appear in the
preference/recent file), and __value__ is the value to which it should be set.
Since *Ethereal* 0.10.12, the recent settings replaces the formerly used
-B, -P and -T flags to manipulate the GUI dimensions.

If __prefname__ is "uat", you can override settings in various user access
tables using the form "uat:__uat filename__:__uat record__".  __uat filename__
must be the name of a UAT file, e.g. __user_dlts__.  __uat_record__ must be in
the form of a valid record for that file, including quotes.  For instance, to
specify a user DLT from the command line, you would use

    -o "uat:user_dlts:\"User 0 (DLT=147)\",\"cops\",\"0\",\"\",\"0\",\"\""
--

-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 *Wireshark* 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 <path setting>::
+
--
Special path settings usually detected automatically.  This is used for
special cases, e.g. starting Wireshark from a known location on an USB stick.

The criterion is of the form __key:path__, where __key__ is one of:

*persconf*:__path__ path of personal configuration files, like the
preferences files.

*persdata*:__path__ path of personal data files, it's the folder initially
opened.  After the very first initialization, the recent file will keep the
folder last used.
--

-r|--read-file  <infile>::
+
--
Read packet data from __infile__, can be any supported capture file format
(including compressed files).  It's not possible to use named pipes or stdin
here, unlike *TShark*! To capture from a pipe or from stdin use *-i -*.
--

-R|--read-filter  <read (display) filter>::
+
--
When reading a capture file specified with the *-r* flag, causes the
specified filter (which uses the syntax of display filters, rather than
that of capture filters) to be applied to all packets read from the
capture file; packets not matching the filter are discarded.
--

-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::
Automatically update the packet display as packets are coming in.

--temp-dir <directory>::
+
--
Specifies the directory into which temporary files (including capture
files) are to be written.  The default behavior on UNIX-compatible systems,
such as Linux, macOS, \*BSD, Solaris, and AIX, is to use the environment
variable __$TMPDIR__ if set, and the system default, typically __/tmp__, if it
is not.  On Windows, the __%TEMP%__ environment variable is used, which
typically defaults to __%USERPROFILE%\AppData\Local\Temp__.
--

--time-stamp-type <type>::
Change the interface's timestamp method. See --list-time-stamp-types.

--update-interval  <interval>::
Set the length of time in milliseconds between new packet reports during
a capture. Also sets the granularity of file duration conditions.
The default value is 100ms.

-v|--version::
Print the full version information and exit.

-w  <outfile>::
Set the default capture file name, or '-' for standard output.

-X <eXtension options>::
+
--
Specify an option to be passed to an *Wireshark* module.  The eXtension option
is in the form __extension_key:value__, where __extension_key__ can be:

*lua_script*:__lua_script_filename__ tells *Wireshark* to load the given script in addition to the
default Lua scripts.

**lua_script**__num__:__argument__ tells *Wireshark* 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 *Wireshark* to use the given file format to read in the
file (the file given in the *-r* command option).

*stdin_descr*:__description__ tells *Wireshark* to use the given description when
capturing from standard input (*-i -*).
--

-y|--linktype  <capture link type>::
+
--
If a capture is started from the command line with *-k*, 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>::
Start with the given display filter.

-z  <statistics>::
+
--
Get *Wireshark* to collect various types of statistics and display the result
in a window that updates in semi-real time.

Some of the 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* 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:

  "eth"   Ethernet addresses
  "fc"    Fibre Channel addresses
  "fddi"  FDDI addresses
  "ip"    IPv4 addresses
  "ipv6"  IPv6 addresses
  "ipx"   IPX addresses
  "tcp"   TCP/IP socket pairs   Both IPv4 and IPv6 are supported
  "tr"    Token Ring addresses
  "udp"   UDP/IP socket pairs   Both IPv4 and IPv6 are supported

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.  By default, the table is sorted according to
the total number of packets.

These tables can also be generated at runtime by selecting the appropriate
conversation type from the menu "Tools/Statistics/Conversation List/".
--

*-z* dcerpc,srt,__name-or-uuid__,__major__.__minor__[,__filter__]::
+
--
Collect call/reply SRT (Service Response Time) data for DCERPC interface
__name__ or __uuid__, version __major__.__minor__.
Data collected is the number of calls for each procedure, MinSRT, MaxSRT
and AvgSRT.
Interface __name__ and __uuid__ are case-insensitive.

Example: [.nowrap]#*-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: [.nowrap]#*-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* dhcp,stat[,__filter__]::
Show DHCP (BOOTP) statistics.

*-z* expert::
Show expert information.

*-z* fc,srt[,__filter__]::
+
--
Collect call/reply SRT (Service Response Time) data for FC.  Data collected
is the number of calls for each Fibre Channel command, MinSRT, MaxSRT and AvgSRT.

Example: *-z fc,srt*
will calculate the Service Response Time as the time delta between the
First packet of the exchange and the Last packet of the exchange.

The data will be presented as separate tables for all normal FC commands,
Only those commands that are seen in the capture will have its stats
displayed.

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 "fc,srt,fc.id==01.02.03"* will collect stats only for
FC packets exchanged by the host at FC address 01.02.03 .
--

*-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*

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,counter,ip.addr==1.2.3.4"* will collect stats only for
H.225 packets exchanged by the host at IP address 1.2.3.4 .
--

*-z* h225,srt[__,filter__]::
+
--
Collect request/response SRT (Service Response Time) data for ITU-T H.225 RAS.
Data collected is the 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 collect stats only for
ITU-T H.225 RAS packets exchanged by the host at IP address 1.2.3.4 .
--

*-z* io,stat::
+
--
Collect packet/bytes statistics for the capture in intervals of 1 second.
This option will open a window with up to 5 color-coded graphs where
number-of-packets-per-second or number-of-bytes-per-second statistics
can be calculated and displayed.

This option can be used multiple times on the command line.

This graph window can also be opened from the Analyze:Statistics:Traffic:IO-Stat
menu item.
--

*-z* ldap,srt[,__filter__]::
+
--
Collect call/reply SRT (Service Response Time) data for LDAP.  Data collected
is the number of calls for each implemented LDAP command, MinSRT, MaxSRT and AvgSRT.

Example: *-z ldap,srt*
will calculate the Service Response Time as the time delta between the
Request and the Response.

The data will be presented as separate tables for all implemented LDAP commands,
Only those commands that are seen in the capture will have its stats
displayed.

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: use *-z "ldap,srt,ip.addr==10.1.1.1"* will collect stats only for
LDAP packets exchanged by the host at IP address 10.1.1.1 .

The only LDAP commands that are currently implemented and for which the stats will be available are:
BIND
SEARCH
MODIFY
ADD
DELETE
MODRDN
COMPARE
EXTENDED
--

*-z* megaco,srt[__,filter__]::
+
--
Collect request/response SRT (Service Response Time) data for MEGACO.
(This is similar to *-z smb,srt*).  Data collected is the number of calls
for each known MEGACO Command, Minimum SRT, Maximum SRT and Average SRT.

Example: *-z megaco,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 "megaco,srt,ip.addr==1.2.3.4"* will collect stats only for
MEGACO packets exchanged by the host at IP address 1.2.3.4 .
--

*-z* mgcp,srt[__,filter__]::
+
--
Collect request/response SRT (Service Response Time) data for MGCP.
(This is similar to *-z smb,srt*).  Data collected is the number of calls
for each known MGCP Type, Minimum SRT, Maximum SRT and Average SRT.

Example: *-z mgcp,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 "mgcp,srt,ip.addr==1.2.3.4"* will collect stats only for
MGCP packets exchanged by the host at IP address 1.2.3.4 .
--

*-z* mtp3,msus[,<filter>]::
Show MTP3 MSU statistics.

*-z* multicast,stat[,<filter>]::
Show UDP multicast stream statistics.

*-z* rpc,programs::
+
--
Collect call/reply SRT data for all known ONC-RPC programs/versions.
Data collected is the number of calls for each protocol/version, MinSRT,
MaxSRT and AvgSRT.
--

*-z* rpc,srt,__name-or-number__,__version__[,<filter>]::
+
--
Collect call/reply SRT (Service Response Time) data for program
__name__/__version__ or __number__/__version__.
Data collected is the number of calls for each procedure, MinSRT, MaxSRT and
AvgSRT.
Program __name__ is case-insensitive.

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: [.nowrap]#*-z rpc,srt,nfs,3,nfs.fh.hash==0x12345678*# will collect NFS v3
SRT statistics for a specific file.
--

*-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 collect stats only for
SIP packets exchanged by the host at IP address 1.2.3.4 .
--

*-z* smb,srt[,__filter__]::
+
--
Collect call/reply SRT (Service Response Time) data for SMB.  Data collected
is the 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 their 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 collect stats only for
SMB packets exchanged by the host at IP address 1.2.3.4 .
--

*-z* voip,calls::
+
--
This option will show a window that shows VoIP calls found in the capture file.
This is the same window shown as when you go to the Statistics Menu and choose
VoIP Calls.

Example: *-z voip,calls*
--

*-z* wlan,stat[,<filter>]::
Show IEEE 802.11 network and station statistics.

*-z* wsp,stat[,<filter>]::
Show WSP packet counters.

include::dissection-options.adoc[tags=**;!tshark]

include::diagnostic-options.adoc[]

== INTERFACE

The link:{wireshark-users-guide-url}[Wireshark User's Guide] contains a description of the user interface. It also may be installed locally along with Wireshark. Pressing the F1 key will attempt to open the guide locally if present, falling back to the online guide if not.

== CAPTURE FILTER SYNTAX

See the manual page of xref:https://www.tcpdump.org/manpages/pcap-filter.7.html[pcap-filter](7) or, if that doesn't exist, xref:https://www.tcpdump.org/manpages/tcpdump.1.html[tcpdump](8),
or, if that doesn't exist, {wireshark-wiki-url}CaptureFilters.

== DISPLAY FILTER SYNTAX

For a complete table of protocol and protocol fields that are filterable
in *Wireshark* see the xref:wireshark-filter.html[wireshark-filter](4) manual page.

include::files.adoc[]

== ENVIRONMENT VARIABLES

// Should this be moved to an include file?

WIRESHARK_CONFIG_DIR::
+
--
This environment variable overrides the location of personal
configuration files.  On UNIX-compatible systems, such as Linux, macOS,
\*BSD, Solaris, and AIX, it defaults to __$XDG_CONFIG_HOME/wireshark__
(or, if that directory doesn't exist but __$HOME/.wireshark__ does
exist, __$HOME/.wireshark__); this is typically
__$HOME/.config/wireshark__.  On Windows, it defaults to
__%APPDATA%\Wireshark__ (or, if %APPDATA% isn't defined,
__%USERPROFILE%\Application Data\Wireshark__).  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 UNIX-compatible
systems, such as Linux, macOS, \*BSD, Solaris, and AIX.

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
UNIX-compatible systems.

WIRESHARK_EXTCAP_DIR::
This environment variable causes the various extcap programs and scripts
to be run 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 UNIX-compatible systems.

WIRESHARK_PLUGIN_DIR::
This environment variable causes the various plugins 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
UNIX-compatible systems.

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, *Wireshark* will call abort(3)
when a dissector bug is encountered.  abort(3) will cause the program to
exit abnormally; if you are running *Wireshark* 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, *Wireshark* 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
*Wireshark* 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_QUIT_AFTER_CAPTURE::
Cause *Wireshark* to exit after the end of the capture session.  This
doesn't automatically start a capture; you must still use *-k* to do
that.  You must also specify an autostop condition, e.g.  *-c* or *-a
duration:...*.  This means that you will not be able to see the results
of the capture after it stops; it's primarily useful for testing.

WIRESHARK_LOG_LEVEL::
This environment variable controls the verbosity of diagnostic messages to
the console. From less verbose to most verbose levels can be `critical`,
`warning`, `message`, `info`, `debug` or `noisy`. Levels above the
current level are also active. Levels `critical` and `error` are always
active.

WIRESHARK_LOG_FATAL::
Sets the fatal log level. Fatal log levels cause the program to abort.
This level can be set to `Error`, `critical` or `warning`. `Error` is
always fatal and is the default.

WIRESHARK_LOG_DOMAINS::
This environment variable selects which log domains are active. The filter is
given as a case-insensitive comma separated list. If set only the included
domains will be enabled. The default domain is always considered to be enabled.
Domain filter lists can be preceded by '!' to invert the sense of the match.

WIRESHARK_LOG_DEBUG::
List of domains with `debug` log level. This sets the level of the provided
log domains and takes precedence over the active domains filter. If preceded
by '!' this disables the `debug` level instead.

WIRESHARK_LOG_NOISY::
Same as above but for `noisy` log level instead.

== AUTHORS

Wireshark would not be the powerful, featureful application it is without the generous contributions of hundreds of developers.

A complete list of authors can be found in the AUTHORS file in Wireshark's source code repository and at https://www.wireshark.org/about.html#authors.

== SEE ALSO

xref:wireshark-filter.html[wireshark-filter](4), xref:tshark.html[tshark](1), xref:editcap.html[editcap](1), xref:https://www.tcpdump.org/manpages/pcap.3pcap.html[pcap](3), xref:dumpcap.html[dumpcap](1), xref:mergecap.html[mergecap](1),
xref:text2pcap.html[text2pcap](1), xref:https://www.tcpdump.org/manpages/pcap-filter.7.html[pcap-filter](7) or xref:https://www.tcpdump.org/manpages/tcpdump.1.html[tcpdump](8)

== NOTES

This is the manual page for *Wireshark* {wireshark-version}.
The latest version of *Wireshark* can be found at
{wireshark-main-url}.

HTML versions of the Wireshark project man pages are available at
{wireshark-man-page-url}.

The Wireshark's User Guide is available at
{wireshark-users-guide-url}.