Provided by: python-pydhcplib_0.6.2-3_all 
NAME
pydhcp - a dhcp command line tool
USAGE
pydhcp --input <TYPE;OPTIONS;NAME> --output <TYPE;OPTIONS;NAME>
DESCRIPTION
pydhcp is a command line tool to read or write dhcp packet on network, and translate from raw data to
human readable informations (and vice-et-versa). pydhcp is a part of the pydhcplib python library.
Input and Output field description
pydhcp takes an input and an output argument. Input and output are described in the same way. For example
:
pydhcp --input 'device;binary|up;eth0:68' --output 'file;readable;myfile.txt' -c 1
<TYPE> field
There is 5 types for the <TYPE> field. Only one type at once can be used : device, address, file, stdin
and stdout. device tells pydhcp to write or listen directly on the network interface and port. address is
to write or listen on a specific Internet Address and port (like 192.168.1.1:67 ). file read or write
data from or to a file. stdin read data from stdin, stdout write data on stdout.
<OPTIONS> field
You can use multiple options in the option field by separate them with a pipe |. There is 4 options for
this field : readable, binary, up and noup. readable id to read or write data in a human readable
language : a packet definition language. This language is described later. Binary form stand for reading
or writing packets in the same binary form they are on the network : an UDP packet. readable and binary
are mutually exclusive. Option up tells pydhcp to set the network interface up if not. noup tells not to
set up the interface. up and noup are only useful in combination with the device type. Default is noup.
<NAME> field
Describe the name of the device (eth0:67,wlan0:client) , the address (192.168.1.1), or the filename
(foo.txt). You can use a port number or the keywords client and server for standard dhcp port.
Other command line options of pydhcp
Option -c : Number of packet to read or write. 0 for unlimited number of packet. Default is 0.
Known limitations
- Only one dhcp packet per file, then count is set to 1 for file I/O - No readable transfert on network
(address or device). Binary only.
-c|--count
Number of packets to process.
EXAMPLES
Read a client packet on any address and write it on a human readable file :
pydhcp -i "address;binary;0.0.0.0:67" -o "file;readable;myfile.bin"
Read a binary dhcp packet from a file and print it on stdout in a human readable form :
pydhcp -i "file;binary;myfile.bin" -o "stdout;readable;"
SEE ALSO
pydhcplib
BUGS
Many...
AUTHOR
Mathieu Ignacio (mignacio[AT]april.org)
pydhcp(8)