Need IP address for ethernet devices

Author Name Status Posted Time Larry Coons 3/31/2009 9:58:34 PM Author is Offline Hi all, I have a requirement that my software is supposed to support multiple installed ethernet devices. I need to get the IP address for a user specified device so that I can broadcast a UDP message. In Linux it is accomplished using the ioctl command SIOCGIFADDR. First a socket is opened, the structure ifreq.ifr_name is set to the ethernet device you want to retrieve the IP address. Normally it will be "eth0" for the first device. I don't know how to do it in Windows. Hopefully someone out there knows how to do this? Larry.

Subject Author Status Date Re: Need IP address for ethernet devices Yvonnet Vogel 3/31/2009 11:22:10 PM Hi Larry, Take a look at GetAdaptersInfo(). I have an example at: http://www.codeguru.com/cpp/i-n/inte...le.php/c10855/ Post Comments Re: Thanks Larry Coons 3/31/2009 11:22:56 PM Thanks, I've downloaded the code and it looks like this might work. I just got to get to to work with the older Visual C++ 6 and get it to work in a DLL. I haven't tried that yet. Next thing to do. Thanks again. Reply With Quote Post Comments Re: I had to switch over to Visual Studio 2005 Larry Coons 3/31/2009 11:23:33 PM I had to switch over to Visual Studio 2005 to get my DLL to compile correctly. Your code helped me see how to get information about the adapter. The only thing I don't know how to do is determine which adapter is the default adapter. Is it the first one on the list? How does Windo ws determines which adapter to use? Is it first detected first use type of methodology? Post Comments Re: First detected adapter.... Yvonnet Vogel 3/31/2009 11:24:23 PM First detected adapter that has an established connection. If it cannot resolve, it goes on to the next, then the next, etc. I did not read this anyware, it is personal observat ion. Post Comments

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