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use std::io::{Error, ErrorKind, IoSlice, IoSliceMut, Result};
use std::net::SocketAddr;
use std::task::{Context, Poll};
use futures_core::ready;
use tokio::future::poll_fn;
use tokio::io::PollEvented;
use tokio::net::ToSocketAddrs;
use crate::mio::{self, Ready};
use crate::opt::{Level, Name, Opt};
use super::split::split;
use super::{Domain, Type, Protocol, RawSend, RawRecv};
pub struct RawSocket {
io: PollEvented<mio::RawSocket>,
}
impl RawSocket {
pub fn new(domain: Domain, kind: Type, protocol: Option<Protocol>) -> Result<Self> {
let sys = mio::RawSocket::new(domain, kind, protocol)?;
let io = PollEvented::new(sys)?;
Ok(RawSocket { io })
}
pub async fn bind<A: ToSocketAddrs>(&self, addr: A) -> Result<()> {
let addr = sockaddr(addr).await?;
self.io.get_ref().bind(&addr)
}
pub fn local_addr(&self) -> Result<SocketAddr> {
self.io.get_ref().local_addr()
}
pub async fn recv_from(&mut self, buf: &mut [u8]) -> Result<(usize, SocketAddr)> {
poll_fn(|cx| self.poll_recv_from(cx, buf)).await
}
pub async fn recv_msg(
&self,
data: &[IoSliceMut<'_>],
ctrl: Option<&mut [u8]>
) -> Result<(usize, SocketAddr)> {
let ctrl = ctrl.unwrap_or(&mut []);
poll_fn(|cx| self.poll_recv_msg(cx, data, ctrl)).await
}
pub async fn send_to<A: ToSocketAddrs>(&mut self, buf: &[u8], addr: A) -> Result<usize> {
let addr = sockaddr(addr).await?;
poll_fn(|cx| self.poll_send_to(cx, buf, &addr)).await
}
pub async fn send_msg<A: ToSocketAddrs>(
&mut self,
addr: A,
data: &[IoSlice<'_>],
ctrl: Option<&[u8]>
) -> Result<usize> {
let addr = sockaddr(addr).await?;
let ctrl = ctrl.unwrap_or(&mut []);
poll_fn(|cx| self.poll_send_msg(cx, &addr, data, ctrl)).await
}
pub fn get_sockopt<O: Opt>(&self, level: Level, name: Name) -> Result<O> {
self.io.get_ref().get_sockopt(level, name)
}
pub fn set_sockopt<O: Opt>(&self, level: Level, name: Name, value: &O) -> Result<()> {
self.io.get_ref().set_sockopt(level, name, value)
}
pub fn split(self) -> (RawRecv, RawSend) {
split(self)
}
pub(crate) fn poll_recv_from(
&self,
cx: &mut Context<'_>,
buf: &mut [u8]
) -> Poll<Result<(usize, SocketAddr)>> {
ready!(self.io.poll_read_ready(cx, Ready::readable()))?;
match self.io.get_ref().recv_from(buf) {
Err(ref e) if is_would_block(e) => self.clear_read_ready(cx)?,
x => Poll::Ready(x),
}
}
pub(crate) fn poll_recv_msg(
&self,
cx: &mut Context<'_>,
data: &[IoSliceMut<'_>],
ctrl: &mut [u8],
) -> Poll<Result<(usize, SocketAddr)>> {
ready!(self.io.poll_read_ready(cx, Ready::readable()))?;
match self.io.get_ref().recv_msg(data, ctrl) {
Err(ref e) if is_would_block(e) => self.clear_read_ready(cx)?,
x => Poll::Ready(x),
}
}
pub(crate) fn poll_send_to(
&self,
cx: &mut Context<'_>,
buf: &[u8],
addr: &SocketAddr
) -> Poll<Result<usize>> {
ready!(self.io.poll_write_ready(cx))?;
match self.io.get_ref().send_to(buf, addr) {
Err(ref e) if is_would_block(e) => self.clear_write_ready(cx)?,
x => Poll::Ready(x),
}
}
pub(crate) fn poll_send_msg(
&self,
cx: &mut Context<'_>,
addr: &SocketAddr,
data: &[IoSlice<'_>],
ctrl: &[u8],
) -> Poll<Result<usize>> {
ready!(self.io.poll_write_ready(cx))?;
match self.io.get_ref().send_msg(addr, data, ctrl) {
Err(ref e) if is_would_block(e) => self.clear_write_ready(cx)?,
x => Poll::Ready(x),
}
}
fn clear_read_ready<T>(&self, cx: &mut Context<'_>) -> Result<Poll<T>> {
self.io.clear_read_ready(cx, Ready::readable())?;
Ok(Poll::Pending)
}
fn clear_write_ready<T>(&self, cx: &mut Context<'_>) -> Result<Poll<T>> {
self.io.clear_write_ready(cx)?;
Ok(Poll::Pending)
}
}
fn is_would_block(e: &Error) -> bool {
e.kind() == ErrorKind::WouldBlock
}
async fn sockaddr<A: ToSocketAddrs>(addr: A) -> Result<SocketAddr> {
match addr.to_socket_addrs().await?.next() {
Some(addr) => Ok(addr),
None => Err(Error::new(ErrorKind::InvalidInput, "invalid socket address")),
}
}