DHClientList

DHClientList is a tool to get the current client list of a DHCP server. With it one can check who is connected to the local network. To do this one must provide the DHCP server address (IP in local network and port), username and password. The resulting list items contains the host name, MAC address, IP and lease time.

Installation

pip install dhclientlist

Note: The pyOpenSSL==0.13 library is required to enable the HTTPS server mode.

Usage

Command-line:

usage: dhclientlist print [-h] [-d DRIVERNAME] [-a ADDRESS] [-u USERNAME]
                          [-p PASSWORD] [-f {json,texttable}]

optional arguments:
  -h, --help            show this help message and exit
  -d DRIVERNAME, --driver DRIVERNAME
                        specify a driver to be used
  -a ADDRESS, --address ADDRESS
                        local dhcp server's address. (default: 192.168.0.1:80)
  -u USERNAME, --username USERNAME
                        local dhcp server's username. (default: admin)
  -p PASSWORD, --password PASSWORD
                        local dhcp server's password.
  -f {json,texttable}, --format {json,texttable}
                        the format of the output list. (default: texttable)

HTTP(S) Server:

usage: dhclientlist serve [-h] [-d DRIVERNAME] [-a ADDRESS] [-u USERNAME]
                          [-p PASSWORD] [--http-username HTTP_USERNAME]
                          [--http-password HTTP_PASSWORD] [-i] [--debug]
                          port

positional arguments:
  port                  port that the dhclientlist HTTP(S) server will bind

optional arguments:
  -h, --help            show this help message and exit
  -d DRIVERNAME, --driver DRIVERNAME
                        specify a driver to be used
  -a ADDRESS, --address ADDRESS
                        local dhcp server's address. (default: 192.168.0.1:80)
  -u USERNAME, --username USERNAME
                        local dhcp server's username. (default: admin)
  -p PASSWORD, --password PASSWORD
                        local dhcp server's password.
  --http-username HTTP_USERNAME
                        dhclientlist server username.
  --http-password HTTP_PASSWORD
                        dhclientlist server password.
  -i, --insecure        use HTTP instead of HTTPS
  --debug               runs the server in debug mode

Python lib:

import dhclientlist
dhclientlist.get(address, username, password)  # optionally the 4th parameter: driver

Drivers

The connection with DHCP server is made by a driver, a python module inside the dhclientlist.drivers package (or in any of its sub-packages) that has a get(address, username, password) function which return a list of dicts; each dict containing the following key-value pairs:

("name", name_str),    # name of the guest connected to the dhcp server
("mac", mac_str),      # MAC address of the guest connected to the dhcp server
("ip", ip_str),        # IP address of the guest connected to the dhcp server
("lease", lease_str)   # time in the format hh:mm:ss until this registry is updated in the dhcp server

The dhclientlist.util.find_driver function will try to find the appropriate driver for the local DHCP server. However, the number of drivers is quite small at the moment, and dhclientlist may not succeed with the local DHCP server. In this case, one is welcome to contribute by forking this project and developing a driver to the local DHCP server.