Network packet-creator and packet-capturer module
netpacket, a Python module written in CPython
netpacket is a packet-creator module that supports ethernet, ARP, IPv4, IPv6, ICMPv4, TCP, UDP and DHCPv4. It also contains a packet-capturer called ppcap (Python pcap). The project contains the raw CPython bindings, and a wrapper library written in Python, which can be found in the directory “netpacket”.
The module tries to be as user-friendly as it can be, leaving tasks like big-endian and little-endian fields to the module itself, the programmer only has to fill in the fields without concerning himself about it.
Note concerning IPv4 and IPv6
IPv4 and IPv6 is the same class, but the programmer will be jailed into IPv4 or IPv6 usage based on an argument passed to the IP class or protocol classes above. IPv4: 0x0800, IPv6: 0x86dd. IPv4 is already default, and no argument needs to be passed.
obj = _netpacket.udp() print(obj) obj = _netpacket.udp(0x86dd) print(obj)
<_netpacket.udpv4 object at 0x7fbff03e3510> <_netpacket.udpv6 object at 0x7fbff03e3570>
# Install libpcap dependency (using gentoo@portage-tree) emerge --ask net-libs/libpcap --quiet-build # Install libpcap dependency (using archlinux) pacman --sync core/libpcap # Build python setup.py build # Build and install python setup.py install
All examples can be found in the directory “examples”. Docstrings is also available for very protocol class and the ppcap class.
netpacket for now only supports Linux, but will support the Unix variants and Mac OS X once the BPF (Berkeley Packet Filter) device implementation is coded in.
Python versions supported
netpacket only supports Python3, and will never have any support for Python2.
Things that will be present in later stages
- IPv4 options.
- IPv6 options.
- TCP options.
- Application-layer classes:
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