Does binding need privilege?

Challenge

Tell whether binding a given port requires elevated privilege.

Task

Implement int needs_root_to_bind(int port).

Input

• port: the port number to bind.

Output

Return 1 if port is a privileged port (1..1023), else 0.

Example

needs_root_to_bind(80)    ->  1   (privileged)
needs_root_to_bind(8080)  ->  0

Edge cases

• Ports 1 through 1023 are privileged; 1024 and above are not.

Input format

port: the port number to bind.

Output format

1 if port is in 1..1023 (privileged), else 0.

Constraints

Binding ports below 1024 needs root or CAP_NET_BIND_SERVICE.

Starter code

int needs_root_to_bind(int port) {
    /* TODO */
    return 0;
}

Common mistakes

Forgetting to set SO_REUSEADDR on listening socket; omitting error checks on bind() or listen(); blocking indefinitely on single connection.

Edge cases to handle

Port already in use (EADDRINUSE); client disconnecting before accept(); interrupted accept calls (EINTR); multiple back-to-back incoming connections.