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use crate::sys::unix::net::{new_ip_socket, socket_addr};
use std::io;
use std::mem;
use std::net::{self, SocketAddr};
use std::os::unix::io::{AsRawFd, FromRawFd};
pub fn bind(addr: SocketAddr) -> io::Result<net::UdpSocket> {
#[allow(clippy::let_and_return)]
let socket = new_ip_socket(addr, libc::SOCK_DGRAM);
socket.and_then(|socket| {
let (raw_addr, raw_addr_length) = socket_addr(&addr);
syscall!(bind(socket, raw_addr.as_ptr(), raw_addr_length))
.map_err(|err| {
let _ = unsafe { libc::close(socket) };
err
})
.map(|_| unsafe { net::UdpSocket::from_raw_fd(socket) })
})
}
pub(crate) fn only_v6(socket: &net::UdpSocket) -> io::Result<bool> {
let mut optval: libc::c_int = 0;
let mut optlen = mem::size_of::<libc::c_int>() as libc::socklen_t;
syscall!(getsockopt(
socket.as_raw_fd(),
libc::IPPROTO_IPV6,
libc::IPV6_V6ONLY,
&mut optval as *mut _ as *mut _,
&mut optlen,
))?;
Ok(optval != 0)
}