This simple python class provides a network sniffer. It uses the scapy libraries.
The scapy's method "sniff" has the characteristic that it locks the execution of the code. With this class you can run the sniffer in a new thread without locking the natural execution of the code.
from Sniffer import Sniffer
from Iface import Iface
iface = Iface('wlan0')
# This is an optional command
iface.set_mtu(2500)
sniffer = Sniffer(iface)
sniffer.start()
# Some instruction
sniffer.stop()
The constructor accepts also callback functions then you can use the scapy methods on sniffed packet:
def print_packet(*args, **kwargs):
print("This message is printed every time that sniffer intercepts a packet.")
print(kwargs)
args[0].show()
def finished(*args, **kwargs):
print("This message is printed when you stop the sniffer.")
iface = Iface('wlan0')
prn_kwargs = {'var': 0}
sniffer = Sniffer(iface, callback_prn=print_packet, callback_stop=finished, callback_prn_kwargs=prn_kwargs)
sniffer.start()
while(sniffer.get_started_flag() is False):
pass
# Some instruction
sniffer.stop()
This class is written with Python3. Then you need to install scapy in python3 enviroment and run script with sudo command.
You can have only one instance of sniffer. At now, if you call .stop method you have to create another instance of sniffer if you want re-run it.
iface = Iface('wlan0')
sniffer = Sniffer(iface)
sniffer.start()
sniffer.stop()
sniffer = Sniffer(iface)
sniffer.start()
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