The `socket_close_wrapper` was manually closing the file descriptor behind Rust's back.
In Rust 1.80+, this triggers the following crash when the socket object naturally drops
and tries to close it a second time:

> **`fatal runtime error: IO Safety violation: owned file descriptor already closed, aborting`**

This patch removes the manual cleanup wrapper and refactors the code to call `recv_and_process` directly.
This allows Rust's standard `Drop` semantics to safely close the socket exactly once when it goes out of scope.