Invalid layout assumptions for std::net::SocketAddrV{4, 6}

[Alphyr]

rio/src/io_uring/uring.rs

Lines 733 to 752 in 319f7fb

 fn addr2raw( 
     addr: &std::net::SocketAddr, 
 ) -> (*const libc::sockaddr, libc::socklen_t) { 
     match *addr { 
         std::net::SocketAddr::V4(ref a) => { 
             let b: *const std::net::SocketAddrV4 = a; 
             ( 
                 b as *const _, 
                 std::mem::size_of_val(a) as libc::socklen_t, 
             ) 
         } 
         std::net::SocketAddr::V6(ref a) => { 
             let b: *const std::net::SocketAddrV6 = a; 
             ( 
                 b as *const _, 
                 std::mem::size_of_val(a) as libc::socklen_t, 
             ) 
         } 
     } 
 } 

This code assumes that the layout of std::net::SocketAddrV{4,6} matches libc::sockaddr, but std makes no such promise. See rust-lang/rust#78802 for more details.

Example fixes: tokio-rs/mio#1388, rust-lang/socket2#120.