forked from M-Labs/humpback-dds
nal: use minimq example
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@ -1,109 +1,190 @@
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use embedded_nal::{TcpStack, Mode, SocketAddr};
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use embedded_nal::SocketAddr::{V4, V6};
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use core::cell::RefCell;
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use nb;
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use smoltcp::wire::{EthernetAddress, IpAddress, IpCidr};
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use smoltcp::iface::{NeighborCache, EthernetInterfaceBuilder};
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use smoltcp::socket::SocketSet;
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use smoltcp::socket::{SocketHandle, TcpSocket, TcpSocketBuffer};
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use smoltcp::time::{Duration, Instant};
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use smoltcp::Error;
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use heapless::{consts, Vec};
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use nb::Error as nbError;
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use core::cell;
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use stm32h7_ethernet as ethernet;
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use smoltcp as net;
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const BUFFER_SIZE: usize = 2048;
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pub static mut TX_STORAGE: &'static mut [u8] = &mut [0; BUFFER_SIZE];
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pub static mut RX_STORAGE: &'static mut [u8] = &mut [0; BUFFER_SIZE];
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use cortex_m_semihosting::hprintln;
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/*
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* Struct for a TCP socket
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* TODO: Consider handling all sockets in this struct
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*/
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pub struct NalTcpClient {}
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use minimq::embedded_nal;
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// impl NalTcpClient {
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// pub fn new(socket: &'a mut TcpSocket<'a>) -> Self {
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// NalTcpClient {
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// socket,
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// }
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// }
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// }
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impl<'a> TcpStack for &'a NalTcpClient{
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// The type returned when we create a new TCP socket
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type TcpSocket = smoltcp::socket::TcpSocket<'a>;
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// The type returned when we have an error
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type Error = Error;
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// Open a new TCP socket. The socket starts in the unconnected state.
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fn open(&self, mode: Mode) -> Result<Self::TcpSocket, Self::Error> {
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let tx_buffer = unsafe { TcpSocketBuffer::new(&mut TX_STORAGE[..]) };
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let rx_buffer = unsafe { TcpSocketBuffer::new(&mut RX_STORAGE[..]) };
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let mut socket = TcpSocket::new(rx_buffer, tx_buffer);
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if let Mode::Timeout(dur) = mode {
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socket.set_timeout(Some(Duration::from_millis(dur.into())));
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#[derive(Debug)]
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pub enum NetworkError {
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NoSocket,
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ConnectionFailure,
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ReadFailure,
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WriteFailure,
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}
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pub struct NetStorage {
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pub ip_addrs: [net::wire::IpCidr; 1],
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pub neighbor_cache: [Option<(net::wire::IpAddress, net::iface::Neighbor)>; 8],
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}
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pub type NetworkInterface =
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net::iface::EthernetInterface<'static, 'static, 'static, ethernet::EthernetDMA<'static>>;
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// TODO: The network stack likely needs a time-tracking mechanic here to support
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// blocking/nonblocking/timeout based operations.
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pub struct NetworkStack<'a, 'b, 'c, 'n> {
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network_interface: &'n mut NetworkInterface,
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sockets: RefCell<net::socket::SocketSet<'a, 'b, 'c>>,
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next_port: RefCell<u16>,
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unused_handles: RefCell<Vec<net::socket::SocketHandle, consts::U16>>,
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}
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impl<'a, 'b, 'c, 'n> NetworkStack<'a, 'b, 'c, 'n> {
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pub fn new(
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interface: &'n mut NetworkInterface,
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sockets: net::socket::SocketSet<'a, 'b, 'c>,
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) -> Self {
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let mut unused_handles: Vec<net::socket::SocketHandle, consts::U16> = Vec::new();
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for socket in sockets.iter() {
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unused_handles.push(socket.handle()).unwrap();
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}
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NetworkStack {
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network_interface: interface,
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sockets: RefCell::new(sockets),
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next_port: RefCell::new(49152),
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unused_handles: RefCell::new(unused_handles),
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}
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}
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pub fn update(&mut self, time: u32) -> bool {
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match self.network_interface.poll(
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&mut self.sockets.borrow_mut(),
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net::time::Instant::from_millis(time as i64),
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) {
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Ok(changed) => changed == false,
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Err(e) => {
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hprintln!("{:?}", e);
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true
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}
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}
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}
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fn get_ephemeral_port(&self) -> u16 {
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// Get the next ephemeral port
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let current_port = self.next_port.borrow().clone();
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let (next, wrap) = self.next_port.borrow().overflowing_add(1);
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*self.next_port.borrow_mut() = if wrap { 49152 } else { next };
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return current_port;
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}
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}
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impl<'a, 'b, 'c, 'n> embedded_nal::TcpStack for NetworkStack<'a, 'b, 'c, 'n> {
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type TcpSocket = net::socket::SocketHandle;
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type Error = NetworkError;
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fn open(&self, _mode: embedded_nal::Mode) -> Result<Self::TcpSocket, Self::Error> {
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// TODO: Handle mode?
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match self.unused_handles.borrow_mut().pop() {
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Some(handle) => {
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// Abort any active connections on the handle.
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let mut sockets = self.sockets.borrow_mut();
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let internal_socket: &mut net::socket::TcpSocket = &mut *sockets.get(handle);
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internal_socket.abort();
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Ok(handle)
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}
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None => Err(NetworkError::NoSocket),
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}
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}
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fn connect(
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&self,
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socket: Self::TcpSocket,
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remote: embedded_nal::SocketAddr,
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) -> Result<Self::TcpSocket, Self::Error> {
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// TODO: Handle socket mode?
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let mut sockets = self.sockets.borrow_mut();
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let internal_socket: &mut net::socket::TcpSocket = &mut *sockets.get(socket);
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// If we're already in the process of connecting, ignore the request silently.
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if internal_socket.is_open() {
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return Ok(socket);
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}
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match remote.ip() {
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embedded_nal::IpAddr::V4(addr) => {
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let address = {
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let octets = addr.octets();
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net::wire::Ipv4Address::new(octets[0], octets[1], octets[2], octets[3])
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};
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internal_socket
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.connect((address, remote.port()), self.get_ephemeral_port())
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.map_err(|_| NetworkError::ConnectionFailure)?;
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}
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embedded_nal::IpAddr::V6(addr) => {
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let address = {
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let octets = addr.segments();
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net::wire::Ipv6Address::new(
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octets[0], octets[1], octets[2], octets[3], octets[4], octets[5],
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octets[6], octets[7],
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)
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};
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internal_socket
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.connect((address, remote.port()), self.get_ephemeral_port())
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.map_err(|_| NetworkError::ConnectionFailure)?;
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}
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};
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Ok(socket)
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}
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// Connect to the given remote host and port.
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fn connect(
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&self,
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mut socket: Self::TcpSocket,
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remote: SocketAddr,
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) -> Result<Self::TcpSocket, Self::Error> {
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let result = match remote {
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V4(v4_addr) => {
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let ip_addr = v4_addr.ip().octets();
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socket.connect((IpAddress::v4(ip_addr[0], ip_addr[1], ip_addr[2], ip_addr[3]), v4_addr.port()), 49500)
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},
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V6(v6_addr) => {
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let ip_addr = v6_addr.ip().segments();
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socket.connect((IpAddress::v6(ip_addr[0], ip_addr[1], ip_addr[2], ip_addr[3],
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ip_addr[0], ip_addr[1], ip_addr[2], ip_addr[3]), v6_addr.port()), 49500)
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}
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};
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match result {
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Ok(_) => Ok(socket),
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Err(_e) => Err(_e),
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}
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}
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/// Check if this socket is connected
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fn is_connected(&self, socket: &Self::TcpSocket) -> Result<bool, Self::Error> {
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Ok(socket.is_active())
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let mut sockets = self.sockets.borrow_mut();
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let socket: &mut net::socket::TcpSocket = &mut *sockets.get(*socket);
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Ok(socket.may_send() && socket.may_recv())
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}
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/// Write to the stream. Returns the number of bytes written is returned
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/// (which may be less than `buffer.len()`), or an error.
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fn write(&self, socket: &mut Self::TcpSocket, buffer: &[u8]) -> nb::Result<usize, Self::Error> {
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if socket.can_send() {
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socket.send_slice(buffer).map_err(nbError::Other)
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} else {
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Err(nbError::Other(Error::Illegal))
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// TODO: Handle the socket mode.
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let mut sockets = self.sockets.borrow_mut();
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let socket: &mut net::socket::TcpSocket = &mut *sockets.get(*socket);
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let result = socket.send_slice(buffer);
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match result {
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Ok(num_bytes) => Ok(num_bytes),
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Err(_) => Err(nb::Error::Other(NetworkError::WriteFailure)),
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}
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}
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/// Read from the stream. Returns `Ok(n)`, which means `n` bytes of
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/// data have been received and they have been placed in
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/// `&buffer[0..n]`, or an error.
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fn read(
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&self,
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socket: &mut Self::TcpSocket,
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buffer: &mut [u8],
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) -> nb::Result<usize, Self::Error> {
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if socket.can_recv() {
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socket.recv_slice(buffer).map_err(nbError::Other)
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} else {
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Err(nbError::Other(Error::Illegal))
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// TODO: Handle the socket mode.
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let mut sockets = self.sockets.borrow_mut();
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let socket: &mut net::socket::TcpSocket = &mut *sockets.get(*socket);
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let result = socket.recv_slice(buffer);
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match result {
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Ok(num_bytes) => Ok(num_bytes),
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Err(_) => Err(nb::Error::Other(NetworkError::ReadFailure)),
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}
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}
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/// Close an existing TCP socket.
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fn close(&self, mut socket: Self::TcpSocket) -> Result<(), Self::Error> {
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socket.close();
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fn close(&self, socket: Self::TcpSocket) -> Result<(), Self::Error> {
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// TODO: Free the ephemeral port in use by the socket.
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let mut sockets = self.sockets.borrow_mut();
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let internal_socket: &mut net::socket::TcpSocket = &mut *sockets.get(socket);
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internal_socket.close();
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self.unused_handles.borrow_mut().push(socket).unwrap();
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Ok(())
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}
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}
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