I’m trying to figure out the best cross platform solution to guarantee that a particular boost socket always binds to a particular network interface (eth0, eth4, etc).

 

I know how to resolve the interface to an address and I see that I can specify an tcp endpoint to tcp socket on construction or with bind, but I also need to specify the port.

 

Since I could be connecting to multiple servers in one instance, and have to deal with multiple instances of this library on the same machine, I can’t rely a fixed port number.

 

So my question(s):

 

Is there a reliable cross platform way to get an endpoint to an address without a port?

 

Or to do what boost tcp socket does by default, to get an unbound port for an address?

 

Or generally guarantee that the socket is bound to a particular network interface?

 

Short of finding a way to resolve ports, I don’t see a way to do this repeatedly. For some context, we are trying to eliminate routing tables to specify the interface to particular servers.  

 

Thanks in advance for any suggestions! 

 

Dan

 



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