Function switch_socket_shutdown 

pub unsafe extern "C" fn switch_socket_shutdown(
    sock: *mut switch_socket_t,
    how: switch_shutdown_how_e,
) -> switch_status_t

Shutdown either reading, writing, or both sides of a socket. @param sock The socket to close @param how How to shutdown the socket. One of:

           SWITCH_SHUTDOWN_READ         no longer allow read requests
           SWITCH_SHUTDOWN_WRITE        no longer allow write requests
           SWITCH_SHUTDOWN_READWRITE    no longer allow read or write requests

@see switch_shutdown_how_e @remark This does not actually close the socket descriptor, it just controls which calls are still valid on the socket.