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How to check internet availability? [message #44158]

Sun, 11 January 2015 14:07

forlano
Messages: 1221
Registered: March 2006
Location: Italy

Senior Contributor

Hello,

do we have some way to check if we are connected to a working network?
It would be nice to have the solution for both windows and linux, but even a dirty solution (using Windows API) only for windows would be ok.

Thanks,
Luigi

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Re: How to check internet availability? [message #44159 is a reply to message #44158]

Sun, 11 January 2015 14:48

Oblivion
Messages: 1266
Registered: August 2007

Senior Contributor

Hello Luigi,

The easiest workaround that comes to my mind is trying to connect to a known network or host (such as google) and grabbing the socket errors if any.
İf a socket error occurs, simply check the errno for error number: ENETUNREACH on Linux, and WSAGetLastError() for WSAEHOSTUNREACH on Windows.

On windows, there are also InternetGetConnectedState() and InternetCheckConnection() functions, from Windows 2000 and on.
http://msdn.microsoft.com/en-us/library/windows/desktop/aa38 4702%28v=vs.85%29.aspx

http://msdn.microsoft.com/en-us/library/windows/desktop/aa38 4346%28v=vs.85%29.aspx

Regards,
Oblivion

Github page: https://github.com/ismail-yilmaz
Bobcat the terminal emulator: https://github.com/ismail-yilmaz/Bobcat

[Updated on: Sun, 11 January 2015 14:58]

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Re: How to check internet availability? [message #44160 is a reply to message #44159]

Sun, 11 January 2015 17:18

forlano
Messages: 1221
Registered: March 2006
Location: Italy

Senior Contributor

Thank you!

Luigi

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Re: How to check internet availability? [message #44162 is a reply to message #44158]

Mon, 12 January 2015 08:20

andreincx
Messages: 15
Registered: March 2014

Promising Member

Hi,

Another portable solution (using U++):

bool isConnected = IpAddrInfo().Execute('google.com', 80);

Andrei

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Re: How to check internet availability? [message #44164 is a reply to message #44162]

Mon, 12 January 2015 15:25

forlano
Messages: 1221
Registered: March 2006
Location: Italy

Senior Contributor

Very good!

thanks,
Luigi

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