Re: [Tutor] Unable to get the gateway IP of wlan interface using python code

[David Rock]

> On Nov 12, 2018, at 13:37, srinivasan  wrote:
> 
> Dear Python Experts,
> 
> *First method:*
> 
> I need to get the IP address basically the gateway IP in my setup I get it
> as "192.168.178.1" when I run the below standalone python code.

Is there a requirement to use only what comes in the standard libraries, or can 
you use things from pypi?
Getting interface details is exactly why netifaces was created

https://pypi.org/project/netifaces/

damocles:src drock$ python3
Python 3.7.0 (default, Oct 28 2018, 22:17:08) 
[Clang 8.0.0 (clang-800.0.42.1)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import netifaces
>>> gws = netifaces.gateways()
>>> gws
{'default': {2: ('192.168.69.1', 'en0')}, 2: [('192.168.69.1', 'en0', True)]}
>>> gws['default']
{2: ('192.168.69.1', 'en0’)}

— 
David Rock
da...@graniteweb.com




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Re: [Tutor] Unable to get the gateway IP of wlan interface using python code

[Bill Campbell]

On Tue, Nov 13, 2018, srinivasan wrote:
>Dear Python Experts,
>
>*First method:*
>
>I need to get the IP address basically the gateway IP in my setup I get it
>as "192.168.178.1" when I run the below standalone python code.
>
>
>*def get_gateway_ip(self):*
>*"""*
>*Get the IP address to the WIFI module from the AP*
>*"""*
>
>*cmd = 'ip route show 0.0.0.0/0  dev wlp1s0 | cut
>-d\  -f3'*
>*f = os.popen(cmd)*
>*return str(f.read().strip())*

This command should get the gateway IP.

Linux: cmd = "ip route list | awk '/^default/{print $3}'"

or perhaps

Linux: cmd = "netstat -rn | awk '/^0.0.0.0/{print $2}'"

OSX: cmd = "netstat -rn | awk '/^default/{print $2}'"

I don't have a freebsd system available to test this, but I think
this pattern should work:

re.compile(r'^(default|0\.0\.0\.0)\s+(\S+)')

Bill
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[Tutor] Unable to get the gateway IP of wlan interface using python code

[srinivasan]

Dear Python Experts,

*First method:*

I need to get the IP address basically the gateway IP in my setup I get it
as "192.168.178.1" when I run the below standalone python code.


*def get_gateway_ip(self):*
*"""*
*Get the IP address to the WIFI module from the AP*
*"""*

*cmd = 'ip route show 0.0.0.0/0  dev wlp1s0 | cut
-d\  -f3'*
*f = os.popen(cmd)*
*return str(f.read().strip())*


I am trying to log the IP in the robot framework script and ensure that my
router is able to ping but "*${SSID_GATEWAY_IP}*" doesn't seem to get
collected from the above python code and pass this value to my custom
method "*Wait Until Device Is Pingable"*

*${RET} =Wait Until Device Is Pingable ${SSID_GATEWAY_IP}*
*Should Be True${RET}*

But whenever I hardcode the "*${SSID_GATEWAY_IP}  192.168.178.1*" in the
robot framework, it seems to be working with "*Wait Until Device Is
Pingable ${SSID_GATEWAY_IP}*"

But the below robot framework script doesn't seems to work with the return
value received from the above python script, could you please do the
needful?

*Get Gateway IP of SSID*
* ${SSID_GATEWAY_IP} = Get Gateway Ip*
* Log  ${SSID_GATEWAY_IP}*
*${RET} =Wait Until Device Is Pingable ${SSID_GATEWAY_IP}*
*Should Be True${RET}*


*SECOND METHOD:*

When I use the subprocess I see the below issue:



def get_gateway_ip(self):
"""
Get the IP address to the WIFI module from the AP
"""

#cmd = 'ip route show 0.0.0.0/0 dev wlp1s0 | cut -d\  -f3'
# f = os.popen(cmd)
# return str(f.read().strip())


p = subprocess.Popen('ip route show 0.0.0.0/0 dev wlp1s0 | cut -d\
-f3', stdout=subprocess.PIPE)
result = p.communicate()[0]
print(result)

#list = os.popen('ip route show 0.0.0.0/0 dev wlp1s0 | cut -d\
-f3').read()

# p = Popen(cmd, shell=True, stdout=PIPE)
# out, err = p.communicate()
# #return (p.returncode, out, err)
# return out
# #print('returncode: %s' % result[0])
# #print('output: %s' % result[1])
# #print('error: %s' % result[2])

#return self._helper.execute_cmd_output_string(cmd)


Error:

root:~/qa/test_library# python3 wifi.py
Enabling wifi
Verify wifi connectivity
True
Get gateway wifi ip
Traceback (most recent call last):
  File "wifi.py", line 134, in 
print(m.get_gateway_ip())
  File "wifi.py", line 76, in get_gateway_ip
p = subprocess.Popen('ip route show 0.0.0.0/0 dev wlp1s0 | cut -d\
-f3', stdout=subprocess.PIPE)
  File "/usr/lib/python3.5/subprocess.py", line 676, in __init__
restore_signals, start_new_session)
  File "/usr/lib/python3.5/subprocess.py", line 1289, in _execute_child
raise child_exception_type(errno_num, err_msg)
FileNotFoundError: [Errno 2] No such file or directory: 'ip route show
0.0.0.0/0 dev wlp1s0 | cut -d\\  -f3'
root:~/qa/test_library#


As I am stuck with this issue from past 2 days, wondering for any clues

Kindly do the needful as early as possible

Many Thanks in adavnce
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