1 use crate::sys::unix::net::{new_ip_socket, socket_addr};
2
3 use std::io;
4 use std::mem;
5 use std::net::{self, SocketAddr};
6 use std::os::unix::io::{AsRawFd, FromRawFd};
7
bind(addr: SocketAddr) -> io::Result<net::UdpSocket>8 pub fn bind(addr: SocketAddr) -> io::Result<net::UdpSocket> {
9 let fd = new_ip_socket(addr, libc::SOCK_DGRAM)?;
10 let socket = unsafe { net::UdpSocket::from_raw_fd(fd) };
11
12 let (raw_addr, raw_addr_length) = socket_addr(&addr);
13 syscall!(bind(fd, raw_addr.as_ptr(), raw_addr_length))?;
14
15 Ok(socket)
16 }
17
only_v6(socket: &net::UdpSocket) -> io::Result<bool>18 pub(crate) fn only_v6(socket: &net::UdpSocket) -> io::Result<bool> {
19 let mut optval: libc::c_int = 0;
20 let mut optlen = mem::size_of::<libc::c_int>() as libc::socklen_t;
21
22 syscall!(getsockopt(
23 socket.as_raw_fd(),
24 libc::IPPROTO_IPV6,
25 libc::IPV6_V6ONLY,
26 &mut optval as *mut _ as *mut _,
27 &mut optlen,
28 ))?;
29
30 Ok(optval != 0)
31 }
32