NetworkInterface.GetAllNetworkInterfaces() giving wrong values in Windows 7

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My application is developed in C#4.0
when i run NetworkInterface.GetAllNetworkInterfaces() to get the NetworkConnections
i am able to get this in Windows Xp computer's
like below
System IP Address: 192.168.34.211
System Subnet Mask: 255.255.248.0

but in the windows 7 it is giving lot of junk network connections :(
like below

System IP Address: fe80::181c:7e45:865e:cef0%11
System Subnet Mask: 0.0.0.0

System IP Address: 192.168.34.211
System Subnet Mask: 255.255.248.0

System IP Address: fe80::5efe:192.168.34.211%12
System Subnet Mask: 0.0.0.0

System IP Address: fe80::100:7f:fffe%13
System Subnet Mask: 0.0.0.0

please advise
what could be the reason ?

Posted 7-Jul-11 3:57am

arun_pk

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3 solutions

Solution 1

The other addresses it gives you are the IPv6 addresses as well as the IPv4 address.

Hope this helps

Posted 7-Jul-11 4:08am

Wayne Gaylard

Comments

arun_pk 7-Jul-11 10:12am

foreach (NetworkInterface networkInterface in NetworkInterface.GetAllNetworkInterfaces())
{

IPInterfaceProperties ipInterfaceProperties = networkInterface.GetIPProperties();
foreach (UnicastIPAddressInformation address in ipInterfaceProperties.UnicastAddresses)
{
ipAddressInfoList.Add(new IPNetworkInterfaceInfo(address.Address, address.IPv4Mask));
}

}

current code is like this how shall i handle to avoid those junk values

Solution 2

Those are IPV6 addresses (which could be considered to be junk by some).

Posted 7-Jul-11 4:10am

#realJSOP

Comments

arun_pk 7-Jul-11 10:12am

foreach (NetworkInterface networkInterface in NetworkInterface.GetAllNetworkInterfaces())
{

IPInterfaceProperties ipInterfaceProperties = networkInterface.GetIPProperties();
foreach (UnicastIPAddressInformation address in ipInterfaceProperties.UnicastAddresses)
{
ipAddressInfoList.Add(new IPNetworkInterfaceInfo(address.Address, address.IPv4Mask));
}

}

current code is like this how shall i handle to avoid those junk values

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#realJSOP · Accepted Answer · 2011-07-07T04:31:00

Solution 3

Do something like this to filter out the IPV6 addresses:

C#

foreach (UnicastIPAddressInformation address in  ipInterfaceProperties.UnicastAddresses)
{
    if (address.Address.AddressFamily == AddressFamily.InternetworkV4)
    {
         ipAddressInfoList.Add(new IPNetworkInterfaceInfo(address.Address, address.IPv4Mask));
    }
}

BTW, you could have easily found this on google.

Posted 7-Jul-11 4:31am

#realJSOP

Comments

arun_pk 7-Jul-11 10:40am

thanks it worked
just a small correction if (address.Address.AddressFamily == AddressFamily.InterNetwork)