Ryan Summers
GitHub
commit
753112e7b0
40
Cargo.toml
40
Cargo.toml
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@ -13,46 +13,30 @@ license = "BSD-2-Clause"
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volatile-register = "0.2"
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aligned = "0.3"
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embedded-hal = "0.2"
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smoltcp = { version = "0.7.0", default-features = false, features = [ "socket-raw", "proto-ipv4", "proto-ipv6" ], optional = true }
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# Dependencies for NAL
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embedded-time = { version = "0.10.1", optional = true }
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embedded-nal = { version = "0.1.0", optional = true }
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heapless = { version = "0.5.6", optional = true }
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smoltcp = { version = "0.7.0", default-features = false, features = [ "socket-raw", "proto-ipv4",
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"proto-ipv6", "socket-tcp", "ethernet"], optional = true }
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cortex-m = {version = "0.5", optional = true }
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# Optional dependencies for building examples
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stm32f4xx-hal = { version = "0.8", optional = true }
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cortex-m = { version = "0.5", optional = true }
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cortex-m-rt = { version = "0.6", optional = true }
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cortex-m-rtic = { version = "0.5.3", optional = true }
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panic-itm = { version = "0.4", optional = true }
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log = { version = "0.4", optional = true }
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[dev-dependencies]
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stm32f4xx-hal = { version = "0.8", features = ["stm32f407", "rt"] }
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cortex-m-rt = "0.6"
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cortex-m-rtic = "0.5.3"
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panic-itm = "0.4"
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log = "0.4"
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[features]
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smoltcp-phy = ["smoltcp"]
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nal = [
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"embedded-time", "embedded-nal", "heapless",
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"smoltcp-phy", "smoltcp/socket-tcp", "smoltcp/ethernet"
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]
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cortex-m-cpu = ["cortex-m"]
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# Example-based features
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smoltcp-examples = [
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"smoltcp-phy", "smoltcp/socket-tcp", "smoltcp/ethernet"
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]
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tx_stm32f407 = [
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"stm32f4xx-hal/stm32f407", "stm32f4xx-hal/rt", "cortex-m", "cortex-m-rtic", "cortex-m-cpu",
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"panic-itm", "log"
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]
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tcp_stm32f407 = [
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"stm32f4xx-hal/stm32f407", "stm32f4xx-hal/rt", "cortex-m", "cortex-m-rt", "cortex-m-rtic",
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"cortex-m-cpu", "smoltcp-examples", "panic-itm", "log"]
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default = []
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[[example]]
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name = "tx_stm32f407"
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required-features = ["tx_stm32f407"]
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required-features = ["smoltcp", "cortex-m-cpu"]
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[[example]]
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name = "tcp_stm32f407"
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required-features = ["tcp_stm32f407"]
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required-features = ["smoltcp", "cortex-m-cpu"]
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[profile.release]
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codegen-units = 1
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@ -12,9 +12,6 @@ pub mod tx;
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#[cfg(feature = "smoltcp")]
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pub mod smoltcp_phy;
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#[cfg(feature = "nal")]
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pub mod nal;
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/// Max raw frame array size
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pub const RAW_FRAME_LENGTH_MAX: usize = 1518;
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309
src/nal.rs
309
src/nal.rs
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@ -1,309 +0,0 @@
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use core::cell::RefCell;
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use core::convert::TryInto;
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use embedded_hal::{blocking::spi::Transfer, digital::v2::OutputPin};
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use embedded_nal as nal;
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pub use embedded_time as time;
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use heapless::{consts, Vec};
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use nal::nb;
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use smoltcp as net;
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use time::duration::*;
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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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Unsupported,
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TimeFault,
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}
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pub type NetworkInterface<SPI, NSS> = net::iface::EthernetInterface<
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'static,
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crate::smoltcp_phy::SmoltcpDevice<crate::Enc424j600<SPI, NSS>>,
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>;
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pub struct NetworkStack<'a, SPI, NSS, IntClock>
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where
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SPI: 'static + Transfer<u8>,
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NSS: 'static + OutputPin,
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IntClock: time::Clock<T = u32>,
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{
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network_interface: RefCell<NetworkInterface<SPI, NSS>>,
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sockets: RefCell<net::socket::SocketSet<'a>>,
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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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time_ms: RefCell<u32>,
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last_update_instant: RefCell<Option<time::Instant<IntClock>>>,
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clock: IntClock,
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connection_timeout_ms: u32,
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}
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impl<'a, SPI, NSS, IntClock> NetworkStack<'a, SPI, NSS, IntClock>
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where
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SPI: Transfer<u8>,
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NSS: OutputPin,
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IntClock: time::Clock<T = u32>,
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{
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pub fn new(
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interface: NetworkInterface<SPI, NSS>,
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sockets: net::socket::SocketSet<'a>,
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clock: IntClock,
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connection_timeout_ms: u32,
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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: RefCell::new(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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time_ms: RefCell::new(0),
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last_update_instant: RefCell::new(None),
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clock,
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connection_timeout_ms,
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}
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}
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// Initiate or advance the timer, and return the duration in ms as u32.
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fn update(&self) -> Result<u32, NetworkError> {
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let mut duration_ms: u32 = 0;
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// Check if it is the first time the stack has updated the time itself
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let now = match *self.last_update_instant.borrow() {
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// If it is the first time, do not advance time
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// Simply store the current instant to initiate time updating
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None => self.clock.try_now().map_err(|_| NetworkError::TimeFault)?,
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// If it was updated before, advance time and update last_update_instant
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Some(instant) => {
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// Calculate elapsed time
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let now = self.clock.try_now().map_err(|_| NetworkError::TimeFault)?;
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let mut duration = now.checked_duration_since(&instant);
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// Normally, the wrapping clock should produce a valid duration.
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// However, if `now` is earlier than `instant` (e.g. because the main
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// application cannot get a valid epoch time during initialisation,
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// we should still produce a duration that is just 1ms.
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if duration.is_none() {
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self.time_ms.replace(0);
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duration = Some(
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Milliseconds(1_u32)
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.to_generic::<u32>(IntClock::SCALING_FACTOR)
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.map_err(|_| NetworkError::TimeFault)?,
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);
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}
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let duration_ms_time: Milliseconds<u32> = duration
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.unwrap()
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.try_into()
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.map_err(|_| NetworkError::TimeFault)?;
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duration_ms = *duration_ms_time.integer();
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// Adjust duration into ms (note: decimal point truncated)
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self.advance_time(duration_ms);
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now
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}
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};
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self.last_update_instant.replace(Some(now));
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Ok(duration_ms)
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}
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fn advance_time(&self, duration_ms: u32) {
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let time = self.time_ms.borrow().wrapping_add(duration_ms);
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self.time_ms.replace(time);
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}
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// Poll on the smoltcp interface
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fn poll(&self) -> Result<bool, NetworkError> {
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match self.network_interface.borrow_mut().poll(
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&mut self.sockets.borrow_mut(),
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net::time::Instant::from_millis(*self.time_ms.borrow() as u32),
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) {
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Ok(changed) => Ok(!changed),
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Err(_e) => Ok(true),
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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, SPI, NSS, IntClock> nal::TcpStack for NetworkStack<'a, SPI, NSS, IntClock>
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where
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SPI: Transfer<u8>,
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NSS: OutputPin,
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IntClock: time::Clock<T = u32>,
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{
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type TcpSocket = net::socket::SocketHandle;
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type Error = NetworkError;
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fn open(&self, _mode: nal::Mode) -> Result<Self::TcpSocket, Self::Error> {
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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 socket: &mut net::socket::TcpSocket = &mut *sockets.get(handle);
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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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handle: Self::TcpSocket,
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remote: nal::SocketAddr,
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) -> Result<Self::TcpSocket, Self::Error> {
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{
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// If the socket has already been connected, ignore the connection
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// request silently.
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let mut sockets = self.sockets.borrow_mut();
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let socket: &mut net::socket::TcpSocket = &mut *sockets.get(handle);
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if socket.state() == net::socket::TcpState::Established {
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return Ok(handle);
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}
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}
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{
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let mut sockets = self.sockets.borrow_mut();
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let socket: &mut net::socket::TcpSocket = &mut *sockets.get(handle);
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// abort() instead of close() prevents TcpSocket::connect() from
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// raising an error
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socket.abort();
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match remote.ip() {
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nal::IpAddr::V4(addr) => {
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let address = net::wire::Ipv4Address::from_bytes(&addr.octets()[..]);
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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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net::wire::IpAddress::Ipv4(address)
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}
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nal::IpAddr::V6(addr) => {
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let address = net::wire::Ipv6Address::from_parts(&addr.segments()[..]);
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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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net::wire::IpAddress::Ipv6(address)
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}
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}
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};
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// Blocking connect
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// Loop to wait until the socket is staying established or closed,
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// or the connection attempt has timed out.
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let mut timeout_ms: u32 = 0;
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loop {
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{
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let mut sockets = self.sockets.borrow_mut();
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let socket: &mut net::socket::TcpSocket = &mut *sockets.get(handle);
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// TCP state at ESTABLISHED means there is connection, so
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// simply return the socket.
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if socket.state() == net::socket::TcpState::Established {
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return Ok(handle);
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}
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// TCP state at CLOSED implies that the remote rejected connection;
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// In this case, abort the connection, and then return the socket
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// for re-connection in the future.
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if socket.state() == net::socket::TcpState::Closed {
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socket.abort();
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// TODO: Return Err(), but would require changes in quartiq/minimq
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return Ok(handle);
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}
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}
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// Any TCP states other than CLOSED and ESTABLISHED are considered
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// "transient", so this function should keep waiting and let smoltcp poll
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// (e.g. for handling echo reqeust/reply) at the same time.
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timeout_ms += self.update()?;
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self.poll()?;
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// Time out, and return the socket for re-connection in the future.
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if timeout_ms > self.connection_timeout_ms {
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// TODO: Return Err(), but would require changes in quartiq/minimq
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return Ok(handle);
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}
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}
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}
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fn is_connected(&self, handle: &Self::TcpSocket) -> Result<bool, Self::Error> {
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let mut sockets = self.sockets.borrow_mut();
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let socket: &mut net::socket::TcpSocket = &mut *sockets.get(*handle);
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Ok(socket.state() == net::socket::TcpState::Established)
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}
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fn write(&self, handle: &mut Self::TcpSocket, buffer: &[u8]) -> nb::Result<usize, Self::Error> {
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let mut write_error = false;
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let mut non_queued_bytes = &buffer[..];
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while non_queued_bytes.len() != 0 {
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let result = {
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let mut sockets = self.sockets.borrow_mut();
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let socket: &mut net::socket::TcpSocket = &mut *sockets.get(*handle);
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let result = socket.send_slice(non_queued_bytes);
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result
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};
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match result {
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Ok(num_bytes) => {
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// If the buffer is completely filled, close the socket and
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// return an error
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if num_bytes == 0 {
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write_error = true;
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break;
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}
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// In case the buffer is filled up, push bytes into ethernet driver
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if num_bytes != non_queued_bytes.len() {
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self.update()?;
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self.poll()?;
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}
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// Process the unwritten bytes again, if any
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non_queued_bytes = &non_queued_bytes[num_bytes..]
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}
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Err(_) => {
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write_error = true;
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break;
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}
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}
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}
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if write_error {
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// Close the socket to push it back to the array, for
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// re-opening the socket in the future
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self.close(*handle)?;
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return Err(nb::Error::Other(NetworkError::WriteFailure));
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}
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Ok(buffer.len())
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}
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fn read(
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&self,
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handle: &mut Self::TcpSocket,
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buffer: &mut [u8],
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) -> nb::Result<usize, Self::Error> {
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// Enqueue received bytes into the TCP socket buffer
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self.update()?;
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self.poll()?;
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{
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let mut sockets = self.sockets.borrow_mut();
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let socket: &mut net::socket::TcpSocket = &mut *sockets.get(*handle);
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let result = socket.recv_slice(buffer);
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match result {
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Ok(num_bytes) => return Ok(num_bytes),
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Err(_) => {}
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}
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}
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// Close the socket to push it back to the array, for
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// re-opening the socket in the future
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self.close(*handle)?;
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Err(nb::Error::Other(NetworkError::ReadFailure))
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}
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fn close(&self, handle: Self::TcpSocket) -> Result<(), Self::Error> {
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let mut sockets = self.sockets.borrow_mut();
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let socket: &mut net::socket::TcpSocket = &mut *sockets.get(handle);
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socket.close();
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let mut unused_handles = self.unused_handles.borrow_mut();
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if unused_handles.iter().find(|&x| *x == handle).is_none() {
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unused_handles.push(handle).unwrap();
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}
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Ok(())
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}
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}
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