Two ethernet interfaces and bsd sockets


I have a question. I have two ethernet interfaces and i'm writing a program that could connect to other machines using my specified interface. In other words, how to associate socket with certain interface on connect?

Thank You,
Tomas Vilda
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Duncan RoeSoftware DeveloperCommented:
You can associate a socket with an interface by using the bind(2) system call. You use the gethostbyname(3) library call to get all your system's addresses (i.e. the address of each NIC). For outgoing calls, bind() is ofyten unnecessary as the system's routing table will decide which i/f to use. If the same host is available via bothj interfaces, you can use bind() to decide which to use.

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