capinfos - Prints information about capture files
capinfos [ -t ] [ -E ] [ -c ] [ -s ] [ -d ] [ -u ] [ -a ] [ -e ] [ -y ]
[ -i ] [ -z ] [ -x ] [ -h ] <infile> ...
Capinfos is a program that reads one or more capture files and returns
some or all available statistics of each <infile>.
The user specifies which statistics to report by specifying flags
corresponding to the statistic. If no flags are specified, Capinfos
will report all statistics available.
Capinfos is able to detect and read the same capture files that are
supported by Wireshark. The input files don'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
<http://www.wireshark.org/docs/man-pages/wireshark.html> is a detailed
description of the way Wireshark handles this, which is the same way
Capinfos handles this.
-t Displays the capture type of the capture file.
-E Displays the per-file encapsulation of the capture file.
-c Counts the number of packets in the capture file.
-s Displays the size of the file, in bytes. This reports the size of
the capture file itself.
-d Displays the total length of all packets in the file, in bytes.
This counts the size of the packets as they appeared in their
original form, not as they appear in this file. For example, if a
packet was originally 1514 bytes and only 256 of those bytes were
saved to the capture file (if packets were captured with a snaplen
or other slicing option), Capinfos will consider the packet to have
been 1514 bytes.
-u Displays the capture duration, in seconds. This is the difference
in time between the earliest packet seen and latest packet seen.
-a Displays the start time of the capture. Capinfos considers the
earliest timestamp seen to be the start time, so the first packet
in the capture is not necessarily the earliest - if packets exist
"out-of-order", time-wise, in the capture, Capinfos detects this.
-e Displays the end time of the capture. Capinfos considers the
latest timestamp seen to be the end time, so the last packet in the
capture is not necessarily the latest - if packets exist "out-of-
order", time-wise, in the capture, Capinfos detects this.
-y Displays the average data rate, in bytes/sec
-i Displays the average data rate, in bits/sec
-z displays the average packet size, in bytes
-x displays the average packet rate, in packets/sec
-h Prints the help listing and exits.
tcpdump(8), pcap(3), wireshark(1), mergecap(1), editcap(1), tshark(1),
Capinfos is part of the Wireshark distribution. The latest version of
Wireshark can be found at <http://www.wireshark.org>.
HTML versions of the Wireshark project man pages are available at:
Ian Schorr <ian[AT]ianschorr.com>
Gerald Combs <gerald[AT]wireshark.org>