21 use libc::{c_char, size_t, ssize_t};
376         libc::setsockopt(  in mark_socket()
378             libc::SOL_SOCKET,  in mark_socket()
379             libc::SO_MARK,  in mark_socket()
380             &mark as *const _ as *const libc::c_void,  in mark_socket()
381             std::mem::size_of::<u32>() as libc::socklen_t,  in mark_socket()
407     mark: libc::uint32_t,  in doh_new()
530         let mut size = std::mem::size_of::<u32>() as libc::socklen_t;  in make_doh_udp_socket()
534                 libc::getsockopt(  in make_doh_udp_socket()
536                     libc::SOL_SOCKET,  in make_doh_udp_socket()
537                     libc::SO_MARK,  in make_doh_udp_socket()
538                     &mut mark as *mut _ as *mut libc::c_void,  in make_doh_udp_socket()
539                     &mut size as *mut _ as *mut libc::socklen_t,  in make_doh_udp_socket()
549             assert_eq!(libc::fcntl(fd, libc::F_GETFL, 0) & libc::O_NONBLOCK, libc::O_NONBLOCK);  in make_doh_udp_socket()