How-To determine a socket address scope
Using liberate::net::socket_address often means understanding
something about the scope of the address.
For binding to a socket, for example, it may be useful to bind to INADDR_ANY
or its IPv6 equivalent. Across both IPv4 and IPv6, you can use the same function
to determine whether the address is that special “any” designator.
Determine if the address is INADDR_ANY
1if (addr.is_any()) { /* ... */ }
Similarly, both IPv4 and IPv6 defines a loopback address. You can find out equally easily if that is what you are dealing with.
Determine if you have a loopback address
1if (addr.is_loopback()) { /* ... */ }
Finally, it may be useful to understand whether a network mask can be reasonably applied to a socket address.
Create from string
1liberate::net::socket_address addr{"192.168.0.1", 443};
2
3// This address works with a /24 mask
4assert(addr.verify_netmask(24));
5
6// But it cannot work with a /42 mask
7assert(!addr.verify_netmask(42));