1 use std::io;
2 use std::mem;
3 use std::net::{self, SocketAddr};
4 #[cfg(not(target_os = "hermit"))]
5 use std::os::fd::{AsRawFd, FromRawFd};
6 // TODO: once <https://github.com/rust-lang/rust/issues/126198> is fixed this
7 // can use `std::os::fd` and be merged with the above.
8 #[cfg(target_os = "hermit")]
9 use std::os::hermit::io::{AsRawFd, FromRawFd};
10
11 use crate::sys::unix::net::{new_ip_socket, socket_addr};
12
bind(addr: SocketAddr) -> io::Result<net::UdpSocket>13 pub fn bind(addr: SocketAddr) -> io::Result<net::UdpSocket> {
14 let fd = new_ip_socket(addr, libc::SOCK_DGRAM)?;
15 let socket = unsafe { net::UdpSocket::from_raw_fd(fd) };
16
17 let (raw_addr, raw_addr_length) = socket_addr(&addr);
18 syscall!(bind(fd, raw_addr.as_ptr(), raw_addr_length))?;
19
20 Ok(socket)
21 }
22
only_v6(socket: &net::UdpSocket) -> io::Result<bool>23 pub(crate) fn only_v6(socket: &net::UdpSocket) -> io::Result<bool> {
24 let mut optval: libc::c_int = 0;
25 let mut optlen = mem::size_of::<libc::c_int>() as libc::socklen_t;
26
27 syscall!(getsockopt(
28 socket.as_raw_fd(),
29 libc::IPPROTO_IPV6,
30 libc::IPV6_V6ONLY,
31 &mut optval as *mut _ as *mut _,
32 &mut optlen,
33 ))?;
34
35 Ok(optval != 0)
36 }
37