How to set local IP address when sending TCP / IP connections?

Question

Using Linux and glibc, when a TCP / IP connection occurs (call connect () on the socket), how can I explicitly choose which of the local IP addresses I want to create this connection if I have several interfaces (with different IP addresses ), where can I contact the remote host?

Is this possible, or does the IP stack of the operating system always automatically choose a route?

Answer 1

Bind to a specific address instead of 0.0.0.0or ::.