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added findLinkLocalIpv6Address

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uhi22 2022-11-10 23:55:25 +01:00
parent 055260dfad
commit 023e0a7fb5
1 changed files with 39 additions and 1 deletions
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40
pyPlcTcpSocket.py
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@ -13,6 +13,8 @@ import select
import sys # for argv
import time # for time.sleep()
import errno
import os
import subprocess
class pyPlcTcpClientSocket():
def __init__(self):
@ -89,7 +91,10 @@ class pyPlcTcpClientSocket():
class pyPlcTcpServerSocket():
def __init__(self):
self.ipAdress = 'fe80::e0ad:99ac:52eb:85d3'
# Todo: find the link-local IPv6 address automatically.
#self.ipAdress = 'fe80::e0ad:99ac:52eb:85d3'
#self.ipAdress = 'fe80::c690:83f3:fbcb:980e%15'
self.ipAdress = ''
self.tcpPort = 15118 # The port for CCS
self.BUFFER_SIZE = 1024 # Normally 1024
# Concept explanation:
@ -191,6 +196,7 @@ def testClientSocket():
print("Testing the pyPlcTcpClientSocket...")
c = pyPlcTcpClientSocket()
c.connect('fe80::e0ad:99ac:52eb:85d3', 15118)
#c.connect('fe80::e0ad:99ac:52eb:9999', 15118)
print("connected="+str(c.isConnected))
print("sending something to the server")
c.transmit(bytes("Test", "utf-8"))
@ -206,8 +212,37 @@ def testClientSocket():
print("end")
def testExtra():
print("testExtra")
findLinkLocalIpv6Address()
def findLinkLocalIpv6Address():
# For the IPv4 address, this works:
# print(socket.gethostbyname(socket.gethostname())) # Result: The ipv4 address of the ethernet adaptor
# But this does not help, we need the IPv6 address.
#
# On windows we can use command line tool "ipconfig".
# The link-local addresses always start with fe80::, so we just parse the output of ipconfig line-by-line.
# If we have multiple interfaces (e.g. ethernet and WLAN), it will find multiple link-local-addresses.
foundAddresses = []
if os.name == 'nt':
result = subprocess.run(["ipconfig.exe"], capture_output=True, text=True, encoding="ansi")
if (len(result.stderr)>0):
print(result.stderr)
else:
lines = result.stdout.split("\n")
for line in lines:
if (line.find("IPv6")>0):
k = line.find(" fe80::")
if (k>0):
foundAddresses.append(line[k+1:])
print("Found " + str(len(foundAddresses)) + " link-local addresses.")
for a in foundAddresses:
print(a)
if __name__ == "__main__":
print("Testing pyPlcTcpSocket.py....")
if (len(sys.argv) == 1):
print("Use command line argument c for clientSocket or s for serverSocket")
exit()
@ -217,4 +252,7 @@ if __name__ == "__main__":
if (sys.argv[1] == "s"):
testServerSocket()
exit()
if (sys.argv[1] == "x"):
testExtra()
exit()
print("Use command line argument c for clientSocket or s for serverSocket")