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Man pages don't have any notion of external links and there isn't enough information for pod2html to resolve the links for manpages in the "See Also" section of the man pages. As a result running pod2html generates a bunch of warning messages and just emphasizes/italicizes the text. Therefore, we change the link (L<name>) command to an emphasizes (I<name>) command. The net result is the same, but you don't get the warnings when generating HTML docs. At some point in the future someone might want to do the work to get the links to generate correctly, but until then this will shut up pod2html. svn path=/trunk/; revision=5021
147 lines
5.5 KiB
Text
147 lines
5.5 KiB
Text
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=head1 NAME
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editcap - Edit and/or translate the format of capture files
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=head1 SYNOPSYS
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B<editcap>
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S<[ B<-F> file format ]>
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S<[ B<-T> encapsulation type ]>
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S<[ B<-r> ]>
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S<[ B<-v> ]>
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S<[ B<-s> snaplen ]>
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S<[ B<-t> time adjustment ]>
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S<[ B<-h> ]>
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I<infile>
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I<outfile>
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S<[ I<record#> ... ]>
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=head1 DESCRIPTION
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B<Editcap> is a program that reads a saved capture file and writes some
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or all of the packets in that capture file to another capture file.
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B<Editcap> knows how to read B<libpcap> capture files, including those
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of B<tcpdump>, B<Ethereal>, and other tools that write captures in that
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format. In addition, B<Editcap> can read capture files from B<snoop>
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and B<atmsnoop>, Shomiti/Finisar B<Surveyor>, Novell B<LANalyzer>,
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Network General/Network Associates DOS-based B<Sniffer> (compressed or
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uncompressed), Microsoft B<Network Monitor>, AIX's B<iptrace>, Cinco
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Networks B<NetXRay>, Network Associates Windows-based B<Sniffer>, AG
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Group/WildPackets B<EtherPeek>/B<TokenPeek>/B<AiroPeek>, B<RADCOM>'s
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WAN/LAN analyzer, B<Lucent/Ascend> router debug output, HP-UX's
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B<nettl>, the dump output from B<Toshiba's> ISDN routers, the output
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from B<i4btrace> from the ISDN4BSD project, the output in B<IPLog>
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format from the Cisco Secure Intrusion Detection System, B<pppd logs>
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(pppdump format), the output from VMS's B<TCPIPtrace> utility, the text
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output from the B<DBS Etherwatch> VMS utility, and traffic capture files
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from Visual Networks' Visual UpTime. There is no need to tell
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B<Editcap> what type of file you are reading; it will determine the file
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type by itself. B<Editcap> is also capable of reading any of these file
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formats if they are compressed using gzip. B<Editcap> recognizes this
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directly from the file; the '.gz' extension is not required for this
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purpose.
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By default, it writes the capture file in B<libpcap> format, and writes
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all of the packets in the capture file to the output file. The B<-F>
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flag can be used to specify the format in which to write the capture
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file; it can write the file in B<libpcap> format (standard B<libpcap>
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format, a modified format used by some patched versions of B<libpcap>,
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the format used by Red Hat Linux 6.1, or the format used by SuSE Linux
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6.3), B<snoop> format, uncompressed B<Sniffer> format, Microsoft
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B<Network Monitor> 1.x format, the format used by Windows-based versions
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of the B<Sniffer> software, and the format used by Visual Networks'
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software.
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A list of packet numbers can be specified on the command line; the
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packets with those numbers will I<not> be written to the capture file,
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unless the B<-r> flag is specified, in which case I<only> those packets
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will be written to the capture file. Ranges of packet numbers can be
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specified as I<start>-I<end>, referring to all packets from I<start> to
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I<end> (removing them all if B<-r> isn't specified, including them all
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if B<-r> is specified).
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If the B<-s> flag is used to specify a snapshot length, frames in the
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input file with more captured data than the specified snapshot length
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will have only the amount of data specified by the snapshot length
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written to the output file. This may be useful if the program that is
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to read the output file cannot handle packets larger than a certain size
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(for example, the versions of snoop in Solaris 2.5.1 and Solaris 2.6
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appear to reject Ethernet frames larger than the standard Ethernet MTU,
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making them incapable of handling gigabit Ethernet captures if jumbo
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frames were used).
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If the B<-t> flag is used to specify a time adjustment, the specified
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adjustment will be applied to all selected frames in the capture file.
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The adjustment is specified as [-]I<seconds>[I<.fractional seconds>].
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For example, B<-t> 3600 advances the timestamp on selected frames by one
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hour while B<-t> -0.5 reduces the timestamp on selected frames by
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one-half second. This feature is useful when synchronizing dumps
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collected on different machines where the time difference between the
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two machines is known or can be estimated.
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If the B<-T> flag is used to specify an encapsulation type, the
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encapsulation type of the output capture file will be forced to the
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specified type, rather than being the type appropriate to the
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encapsulation type of the input capture file. Note that this merely
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forces the encapsulation type of the output file to be the specified
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type; the packet headers of the packets will not be translated from the
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encapsulation type of the input capture file to the specified
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encapsulation type (for example, it will not translate an Ethernet
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capture to an FDDI capture if an Ethernet capture is read and 'B<-T
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fddi>' is specified).
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=head1 OPTIONS
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=over 4
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=item -F
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Sets the file format of the output capture file.
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=item -T
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Sets the packet encapsulation type of the output capture file.
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=item -r
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Causes the packets whose packet numbers are specified on the command
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line to be written to the output capture file, and no other packets to
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be written to the output capture file.
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=item -v
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Causes B<editcap> to print a number of messages while it's working.
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=item -s
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Sets the snapshot length to use when writing the data.
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=item -t
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Sets the time adjustment to use on selected frames.
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=item -h
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Prints the version and options and exits.
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=head1 SEE ALSO
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I<tcpdump(8)>, I<pcap(3)>, I<ethereal(1)>, I<mergecap(1)>
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=head1 NOTES
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B<Editcap> is part of the B<Ethereal> distribution. The latest version
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of B<Ethereal> can be found at B<http://www.ethereal.com>.
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=head1 AUTHORS
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Original Author
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-------- ------
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Richard Sharpe <sharpe@ns.aus.com>
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Contributors
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------------
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Guy Harris <guy@alum.mit.edu>
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