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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