Re: How to know if a network adapter is connected


"fred_d" <duchassin@xxxxxxxxx> wrote in message news:gcnevp$neg$1@xxxxxxxxxxxxxxxxxxxxx
Bind is not working after recv().
Because after receiving network packets i would like to bind to usb network and if it's ok, i give USB address.

Excuse me if it's not very clear.

If i use bind before recv(), and i give an IP address to bind(), it's not working if the interface is not connected !

I'm turning and turning .... but i found no good solution (and simple ;-))))

Help!

Fred,

Binding a socket to an adapter instructs the NDIS to receive only from this socket. This is the only way I know to identify the network adapter, where a packet is received. You have to bind the adapter before calling any send/receive function. Sorry.

When you write a service (http://msdn.microsoft.com/en-us/library/aa446909.aspx) you get an IOCTL call (http://msdn.microsoft.com/en-us/library/ms891090.aspx), when the adapter state has changed. You can use this notification to update your sockets and bind to newly connected adapters.

/Helge

.

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