Raw socket is a layer 2 python library for communication using the MAC addresses only.
This allows you to create a custom made Ethernet/WiFi communication system which is not using IP nor TCP/UDP or to debug custom frames such as SERCOS III, Profibus, ARP, PTP, ...
Python versions tested:
- 2.7.x
- 3.5.x
- 3.8.x
OSes:
- Linux 14.04
- Linux 16.04
- Linux 18.04
- Linux 20.04
Not working on:
- Windows 10 - Due to Raw socket limitation
- Mac OSX - Due to implementation (can likely be made working)
Pros:
- Low level
- Not using TCP-UDP/IP
- Dead simple
- Can broadcast
- MTU of 1500
- Asynchronous server
- Stateful capability
Cons:
- Low level
- Not using TCP-UDP/IP
- No encryption
- No fragmentation
- Requires root
- MTU of 1500 (Ethernet frames)
# Soon sudo -H pip install rawsocketpy # for now: git clone https://github.com/AlexisTM/rawsocket_python cd rawsocket_python sudo python setup.py installOn one computer:
sudo python -c "from rawsocketpy import RawSocket sock = RawSocket('wlp2s0', 0xEEFA) while True: print(sock.recv())" # 12:34:56:78:9A:BC == 0xEEFA => FF:FF:FF:FF:FF:FF - OK: # BooOn the second computer over the same router (or same network on Zerotier):
sudo python -c "from rawsocketpy import RawSocket; import time sock = RawSocket('wlp2s0', 0xEEFA) while True: sock.send('Boo') print('Boo has been sent') time.sleep(0.5)"from rawsocketpy import RawSocket # 0xEEFA is the ethertype # The most common are available here: https://en.wikipedia.org/wiki/EtherType # The full official list is available here: https://regauth.standards.ieee.org/standards-ra-web/pub/view.html#registries # Direct link: https://standards.ieee.org/develop/regauth/ethertype/eth.csv # You can use whatever you want but using a already use type can have unexpected behaviour. sock = RawSocket("wlp2s0", 0xEEFA) sock.send("some data") # Broadcast "some data" with an ethertype of 0xEEFA sock.send("personal data", dest="\xAA\xBB\xCC\xDD\xEE\xFF") # Send "personal data to \xAA\xBB\xCC\xDD\xEE\xFF with an ether type of 0xEEFA sock.send("other data", ethertype="\xEE\xFF") # Broadcast "other data" with an ether type of 0xEEFFOn another machine, you can run the following:
from rawsocketpy import RawSocket, to_str sock = RawSocket("wlp2s0", 0xEEFA) packet = sock.recv() # The type of packet is RawPacket() which allows pretty printing and unmarshal the raw data. # If you are using Python2, all data is encoded as unicode strings "\x01.." while Python3 uses bytearray. print(packet) # Pretty print packet.dest # string "\xFF\xFF\xFF\xFF\xFF\xFF" or bytearray(b"\xFF\xFF\xFF\xFF\xFF\xFF") packet.src # string "\x12\x12\x12\x12\x12\x13" or bytearray(b"\x12\x12\x12\x12\x12\x13") packet.type # string "\xEE\xFA" or bytearray([b"\xEE\xFA"] packegt.data # string "some data" or bytearray(b"some data"] print(to_str(packet.dest)) # Human readable MAC: FF:FF:FF:FF:FF:FF print(to_str(packet.type, "")) # Human readable type: EEFAfrom rawsocketpy import RawServer class LongTaskTest(RawRequestHandler): def handle(self): time.sleep(1) print(self.packet) def finish(self): print("End") def setup(self): print("Begin") def main(): rs = RawServer("wlp2s0", 0xEEFA, LongTaskTest) rs.spin() if __name__ == '__main__': main()Available only if gevent is installed.
from rawsocketpy import RawRequestHandler, RawAsyncServerCallback import time def callback(handler, server): print("callback") handler.setup() handler.handle() handler.finish() class LongTaskTest(RawRequestHandler): def handle(self): time.sleep(1) print(self.packet) def finish(self): print("End") def setup(self): print("Begin") def main(): rs = RawAsyncServerCallback("wlp2s0", 0xEEFA, LongTaskTest, callback) rs.spin() if __name__ == '__main__': main()You are free to contribue, the following capabilities are welcome:
- Windows compatibility (even possible?)
- MacOS compatibility
- More Python versions and OS tests
- Bring a major refactor ;)
- Alexis PAQUES - @AlexisTM