Function getnameinfo 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn getnameinfo(
    addr: *const sockaddr,
    addrlen: socklen_t,
    host: *mut c_char,
    hostlen: socklen_t,
    serv: *mut c_char,
    servlen: socklen_t,
    flags: c_int,
) -> c_int

See https://pubs.opengroup.org/onlinepubs/9799919799/functions/getnameinfo.html.