i like to write useful cli scripts for my colleagues at work and we have always the same problem with different operating systems. I found following question but in contrast to those solutions with higher frameworks like BeeWare I am seeking for very low level scripts which run on the cli and are very readable to all kind of python programmers. So I decided to create a use case and a sample ipchecker.py script which illustrates my preferred concept to share my recipes with my friends. The most useful case which everyone can profit from is to see the own IP addresses. Checkout MORE ON IPS PYTHON
I know there are lot of ways to check IPS but I want to do it in a way which can be seen as a general structure to add more komplex stuff in future. So let's start with this script:
user@pc : pyton ipchecker.py # prints a list of my addresses
user@pc : ['192.168.178.11', '172.18.1.9', '172.00.0.1', '2ak1:c22:c898:2d00:9788:6b0c:9ws2:4ss4', '2a00:c32:c318:23d0:1a2c:23f5:4rs0:88r1']
Is this a good way?
ipchecker.py
import subprocess
class LinuxIpChecker:
"""
Only for linux
"""
def __init__(self) -> None:
self.runOnLinux()
def runOnLinux(self):
output = subprocess.check_output(['hostname', '-I'])
addresses = [
i for i in str(
output.decode(
'utf-8'
).replace('\n', '')
).split(' ') if len(i) > 0
]
print(addresses)
return addresses
class IpChecker(object):
"""
Just run and do not bother if windows or linux
"""
def __init__(self) -> None:
self.run()
def run(self):
try:
self.runOnLinux()
return
except Exception as e:
print(e)
try:
self.runOnWindows()
except Exception as e:
print('runOnWindows ::: \n', e)
def runOnLinux(self):
output = subprocess.check_output(['hostname', '-I'])
addresses = [i for i in str(output.decode(
'utf-8'
).replace('\n', '')).split(' ') if len(i) > 0
]
print(addresses)
return addresses
def runOnWindows(self):
addresses = []
for i in self.getIPAddresses():
print(i)
addresses.append(i)
return addresses
def getIPAddresses():
"""
credits to https://stackoverflow.com/users/18745/dzinx
"""
from ctypes import Structure, windll, sizeof
from ctypes import c_ulong, c_uint, c_ubyte, c_char
from ctypes import POINTER, byref
MAX_ADAPTER_DESCRIPTION_LENGTH = 128
MAX_ADAPTER_NAME_LENGTH = 256
MAX_ADAPTER_ADDRESS_LENGTH = 8
class IP_ADDR_STRING(Structure):
pass
LP_IP_ADDR_STRING = POINTER(IP_ADDR_STRING)
IP_ADDR_STRING._fields_ = [
("next", LP_IP_ADDR_STRING),
("ipAddress", c_char * 16),
("ipMask", c_char * 16),
("context", c_ulong)]
class IP_ADAPTER_INFO (Structure):
pass
LP_IP_ADAPTER_INFO = POINTER(IP_ADAPTER_INFO)
IP_ADAPTER_INFO._fields_ = [
("next", LP_IP_ADAPTER_INFO),
("comboIndex", c_ulong),
("adapterName", c_char * (MAX_ADAPTER_NAME_LENGTH + 4)),
("description", c_char * (MAX_ADAPTER_DESCRIPTION_LENGTH + 4)),
("addressLength", c_uint),
("address", c_ubyte * MAX_ADAPTER_ADDRESS_LENGTH),
("index", c_ulong),
("type", c_uint),
("dhcpEnabled", c_uint),
("currentIpAddress", LP_IP_ADDR_STRING),
("ipAddressList", IP_ADDR_STRING),
("gatewayList", IP_ADDR_STRING),
("dhcpServer", IP_ADDR_STRING),
("haveWins", c_uint),
("primaryWinsServer", IP_ADDR_STRING),
("secondaryWinsServer", IP_ADDR_STRING),
("leaseObtained", c_ulong),
("leaseExpires", c_ulong)]
GetAdaptersInfo = windll.iphlpapi.GetAdaptersInfo
GetAdaptersInfo.restype = c_ulong
GetAdaptersInfo.argtypes = [LP_IP_ADAPTER_INFO, POINTER(c_ulong)]
adapterList = (IP_ADAPTER_INFO * 10)()
buflen = c_ulong(sizeof(adapterList))
rc = GetAdaptersInfo(byref(adapterList[0]), byref(buflen))
if rc == 0:
for a in adapterList:
adNode = a.ipAddressList
while True:
ipAddr = adNode.ipAddress
if ipAddr:
yield ipAddr
adNode = adNode.next
if not adNode:
break
if __name__ == '__main__':
result = LinuxIpChecker()
