mirror of
https://github.com/uhi22/pyPLC.git
synced 2024-11-10 01:05:42 +00:00
67 lines
2.9 KiB
Python
Executable file
67 lines
2.9 KiB
Python
Executable file
|
|
# test
|
|
|
|
import pcap
|
|
import time
|
|
|
|
|
|
|
|
class tester():
|
|
|
|
def findEthernetAdaptor(self):
|
|
self.strInterfaceName="eth0" # default, if the real is not found
|
|
print("Interfaces:\n" + '\n'.join(pcap.findalldevs()))
|
|
for i in range(0, 10):
|
|
strInterfaceName = pcap.ex_name("eth"+str(i))
|
|
if (strInterfaceName == '\\Device\\NPF_{E4B8176C-8516-4D48-88BC-85225ABCF259}'):
|
|
print("This is the wanted Ethernet adaptor.")
|
|
self.strInterfaceName="eth"+str(i)
|
|
print("eth"+ str(i) + " is " + strInterfaceName)
|
|
|
|
|
|
def __init__(self):
|
|
self.nPacketsReceived = 0
|
|
#self.sniffer = pcap.pcap(name=None, promisc=True, immediate=True, timeout_ms=50)
|
|
# eth3 means: Third entry from back, in the list of interfaces, which is provided by pcap.findalldevs.
|
|
# Improvement necessary: select the interface based on the name.
|
|
# For debugging of the interface names, we can patch the file
|
|
# C:\Users\uwemi\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.10_qbz5n2kfra8p0\LocalCache\local-packages\Python310\site-packages\pcap\_pcap_ex.py,
|
|
# in the function
|
|
# def name(name: bytes) -> bytes:
|
|
# in the place after
|
|
# if i == idx:
|
|
# print("index match at " + str(i) + " dev name=" + str(dev.name) + " dev.description=" + str(dev.description))
|
|
# This will print the description of the used interface.
|
|
#
|
|
# Patch for non-blocking read-iteration:
|
|
# in _pcap.py, function def __next__(self), in the case of timeout (if n==0), we need to "raise StopIteration" instead of "continue".
|
|
#
|
|
self.findEthernetAdaptor()
|
|
self.sniffer = pcap.pcap(name=self.strInterfaceName, promisc=True, immediate=True, timeout_ms=10)
|
|
self.sniffer.setnonblock(True)
|
|
print("sniffer created at " + self.strInterfaceName)
|
|
|
|
def mainfunction(self):
|
|
# print("will evaluate self.sniffer")
|
|
for ts, pkt in self.sniffer: # attention: for using this in non-blocking manner, we need the patch described above.
|
|
self.nPacketsReceived+=1
|
|
# print('%d' % (ts)) # the time stamp
|
|
|
|
def callbackfunction(self, timestamp, pkt, *args):
|
|
self.nPacketsReceived+=1
|
|
#print("The callback #" + str(self.nPacketsReceived) + " " + str(len(pkt)) + " bytes:" + '%d' % (timestamp)) # the time stamp
|
|
|
|
def mainfunction_new(self):
|
|
# https://stackoverflow.com/questions/31305712/how-do-i-make-libpcap-pcap-loop-non-blocking
|
|
# Tell the sniffer to give max 100 received packets to the callback function:
|
|
self.sniffer.dispatch(100, self.callbackfunction, None)
|
|
|
|
def close(self):
|
|
self.sniffer.close()
|
|
|
|
t=tester()
|
|
for i in range(0, 10):
|
|
print("Loop nr " + str(i) + " and " + str(t.nPacketsReceived) + " packets in total")
|
|
time.sleep(0.01)
|
|
t.mainfunction_new()
|
|
t.close()
|