Merge #717
717: WIP: USB CDC NCM (Ethernet over USB) r=Dirbaio a=Dirbaio TODO: - [x] Add support for string handling in `embassy-usb`, remove the MAC addr string hax - [x] Harden parsing of incoming NTBs to avoid panics. - [ ] Parse all datagrams in a NDP, not just the first. -- tricky, I've made it tell the host we support only one packet per NTB instead. - [ ] Add support for all required control transfers. -- WONTFIX, seems no OS cares about those. - [x] Works on Linux - [x] Doesn't work on Android, make it work - [x] Check if it works in Windows (Win10 has some sort of CDC NCM support afaict?) -- works on Win11, CDC-NCM not supported on Win10 - [x] Check if it works in MacOS (I don't know if it's supposed to) - WORKS I won't add the `embassy-net` driver to `embassy-usb-ncm` for now because `embassy-net` buffer management will likely be refactored soon, so there's not much point to it. Co-authored-by: Dario Nieuwenhuis <dirbaio@dirbaio.net>
This commit is contained in:
bors[bot]
GitHub
commit
a1746f4dda
@ -58,7 +58,7 @@ impl<'a> TcpSocket<'a> {
|
||||
.await
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||||
}
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||||
|
||||
pub async fn listen<T>(&mut self, local_endpoint: T) -> Result<()>
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||||
pub async fn accept<T>(&mut self, local_endpoint: T) -> Result<()>
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||||
where
|
||||
T: Into<IpEndpoint>,
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||||
{
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||||
@ -66,9 +66,7 @@ impl<'a> TcpSocket<'a> {
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||||
|
||||
futures::future::poll_fn(|cx| {
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||||
self.with(|s, _| match s.state() {
|
||||
TcpState::Closed | TcpState::TimeWait => Poll::Ready(Err(Error::Unaddressable)),
|
||||
TcpState::Listen => Poll::Ready(Ok(())),
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||||
TcpState::SynSent | TcpState::SynReceived => {
|
||||
TcpState::Listen | TcpState::SynSent | TcpState::SynReceived => {
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||||
s.register_send_waker(cx.waker());
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||||
Poll::Pending
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||||
}
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||||
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||||
19
embassy-usb-ncm/Cargo.toml
Normal file
19
embassy-usb-ncm/Cargo.toml
Normal file
@ -0,0 +1,19 @@
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[package]
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name = "embassy-usb-ncm"
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version = "0.1.0"
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edition = "2021"
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||||
[package.metadata.embassy_docs]
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src_base = "https://github.com/embassy-rs/embassy/blob/embassy-usb-ncm-v$VERSION/embassy-usb-ncm/src/"
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src_base_git = "https://github.com/embassy-rs/embassy/blob/master/embassy-usb-ncm/src/"
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||||
features = ["defmt"]
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||||
flavors = [
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{ name = "default", target = "thumbv7em-none-eabihf" },
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]
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[dependencies]
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embassy = { version = "0.1.0", path = "../embassy" }
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embassy-usb = { version = "0.1.0", path = "../embassy-usb" }
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defmt = { version = "0.3", optional = true }
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log = { version = "0.4.14", optional = true }
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225
embassy-usb-ncm/src/fmt.rs
Normal file
225
embassy-usb-ncm/src/fmt.rs
Normal file
@ -0,0 +1,225 @@
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#![macro_use]
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#![allow(unused_macros)]
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#[cfg(all(feature = "defmt", feature = "log"))]
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compile_error!("You may not enable both `defmt` and `log` features.");
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|
||||
macro_rules! assert {
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($($x:tt)*) => {
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{
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#[cfg(not(feature = "defmt"))]
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||||
::core::assert!($($x)*);
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#[cfg(feature = "defmt")]
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::defmt::assert!($($x)*);
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||||
}
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||||
};
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||||
}
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||||
|
||||
macro_rules! assert_eq {
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||||
($($x:tt)*) => {
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||||
{
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#[cfg(not(feature = "defmt"))]
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::core::assert_eq!($($x)*);
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#[cfg(feature = "defmt")]
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::defmt::assert_eq!($($x)*);
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||||
}
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};
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}
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macro_rules! assert_ne {
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($($x:tt)*) => {
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{
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#[cfg(not(feature = "defmt"))]
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::core::assert_ne!($($x)*);
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#[cfg(feature = "defmt")]
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::defmt::assert_ne!($($x)*);
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}
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};
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}
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macro_rules! debug_assert {
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($($x:tt)*) => {
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{
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#[cfg(not(feature = "defmt"))]
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::core::debug_assert!($($x)*);
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||||
#[cfg(feature = "defmt")]
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::defmt::debug_assert!($($x)*);
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||||
}
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||||
};
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||||
}
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||||
|
||||
macro_rules! debug_assert_eq {
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||||
($($x:tt)*) => {
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||||
{
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||||
#[cfg(not(feature = "defmt"))]
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||||
::core::debug_assert_eq!($($x)*);
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||||
#[cfg(feature = "defmt")]
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||||
::defmt::debug_assert_eq!($($x)*);
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||||
}
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||||
};
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||||
}
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||||
|
||||
macro_rules! debug_assert_ne {
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||||
($($x:tt)*) => {
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||||
{
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||||
#[cfg(not(feature = "defmt"))]
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||||
::core::debug_assert_ne!($($x)*);
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||||
#[cfg(feature = "defmt")]
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||||
::defmt::debug_assert_ne!($($x)*);
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||||
}
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||||
};
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||||
}
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||||
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||||
macro_rules! todo {
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||||
($($x:tt)*) => {
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||||
{
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#[cfg(not(feature = "defmt"))]
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::core::todo!($($x)*);
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#[cfg(feature = "defmt")]
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::defmt::todo!($($x)*);
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||||
}
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||||
};
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||||
}
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||||
|
||||
macro_rules! unreachable {
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||||
($($x:tt)*) => {
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||||
{
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||||
#[cfg(not(feature = "defmt"))]
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::core::unreachable!($($x)*);
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#[cfg(feature = "defmt")]
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||||
::defmt::unreachable!($($x)*);
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||||
}
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||||
};
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||||
}
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||||
|
||||
macro_rules! panic {
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||||
($($x:tt)*) => {
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||||
{
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||||
#[cfg(not(feature = "defmt"))]
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||||
::core::panic!($($x)*);
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#[cfg(feature = "defmt")]
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||||
::defmt::panic!($($x)*);
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||||
}
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||||
};
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||||
}
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||||
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||||
macro_rules! trace {
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($s:literal $(, $x:expr)* $(,)?) => {
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||||
{
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||||
#[cfg(feature = "log")]
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||||
::log::trace!($s $(, $x)*);
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||||
#[cfg(feature = "defmt")]
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||||
::defmt::trace!($s $(, $x)*);
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||||
#[cfg(not(any(feature = "log", feature="defmt")))]
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||||
let _ = ($( & $x ),*);
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||||
}
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||||
};
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||||
}
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||||
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||||
macro_rules! debug {
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||||
($s:literal $(, $x:expr)* $(,)?) => {
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||||
{
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#[cfg(feature = "log")]
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||||
::log::debug!($s $(, $x)*);
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||||
#[cfg(feature = "defmt")]
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::defmt::debug!($s $(, $x)*);
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#[cfg(not(any(feature = "log", feature="defmt")))]
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||||
let _ = ($( & $x ),*);
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||||
}
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||||
};
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||||
}
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||||
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||||
macro_rules! info {
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||||
($s:literal $(, $x:expr)* $(,)?) => {
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||||
{
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||||
#[cfg(feature = "log")]
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||||
::log::info!($s $(, $x)*);
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||||
#[cfg(feature = "defmt")]
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||||
::defmt::info!($s $(, $x)*);
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||||
#[cfg(not(any(feature = "log", feature="defmt")))]
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||||
let _ = ($( & $x ),*);
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||||
}
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||||
};
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||||
}
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||||
|
||||
macro_rules! warn {
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||||
($s:literal $(, $x:expr)* $(,)?) => {
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||||
{
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||||
#[cfg(feature = "log")]
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||||
::log::warn!($s $(, $x)*);
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||||
#[cfg(feature = "defmt")]
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||||
::defmt::warn!($s $(, $x)*);
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||||
#[cfg(not(any(feature = "log", feature="defmt")))]
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||||
let _ = ($( & $x ),*);
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||||
}
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||||
};
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||||
}
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||||
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||||
macro_rules! error {
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||||
($s:literal $(, $x:expr)* $(,)?) => {
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||||
{
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||||
#[cfg(feature = "log")]
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||||
::log::error!($s $(, $x)*);
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||||
#[cfg(feature = "defmt")]
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||||
::defmt::error!($s $(, $x)*);
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||||
#[cfg(not(any(feature = "log", feature="defmt")))]
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||||
let _ = ($( & $x ),*);
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||||
}
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||||
};
|
||||
}
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||||
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||||
#[cfg(feature = "defmt")]
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||||
macro_rules! unwrap {
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||||
($($x:tt)*) => {
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||||
::defmt::unwrap!($($x)*)
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||||
};
|
||||
}
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||||
|
||||
#[cfg(not(feature = "defmt"))]
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||||
macro_rules! unwrap {
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||||
($arg:expr) => {
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||||
match $crate::fmt::Try::into_result($arg) {
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||||
::core::result::Result::Ok(t) => t,
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||||
::core::result::Result::Err(e) => {
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::core::panic!("unwrap of `{}` failed: {:?}", ::core::stringify!($arg), e);
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||||
}
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||||
}
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||||
};
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($arg:expr, $($msg:expr),+ $(,)? ) => {
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||||
match $crate::fmt::Try::into_result($arg) {
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||||
::core::result::Result::Ok(t) => t,
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||||
::core::result::Result::Err(e) => {
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||||
::core::panic!("unwrap of `{}` failed: {}: {:?}", ::core::stringify!($arg), ::core::format_args!($($msg,)*), e);
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||||
}
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||||
}
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||||
}
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||||
}
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||||
#[derive(Debug, Copy, Clone, Eq, PartialEq)]
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||||
pub struct NoneError;
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||||
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||||
pub trait Try {
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||||
type Ok;
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||||
type Error;
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||||
fn into_result(self) -> Result<Self::Ok, Self::Error>;
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||||
}
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||||
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||||
impl<T> Try for Option<T> {
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||||
type Ok = T;
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type Error = NoneError;
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||||
|
||||
#[inline]
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||||
fn into_result(self) -> Result<T, NoneError> {
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||||
self.ok_or(NoneError)
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||||
}
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||||
}
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||||
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||||
impl<T, E> Try for Result<T, E> {
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||||
type Ok = T;
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||||
type Error = E;
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||||
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||||
#[inline]
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||||
fn into_result(self) -> Self {
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||||
self
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||||
}
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||||
}
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||||
489
embassy-usb-ncm/src/lib.rs
Normal file
489
embassy-usb-ncm/src/lib.rs
Normal file
@ -0,0 +1,489 @@
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||||
#![no_std]
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||||
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||||
// This mod MUST go first, so that the others see its macros.
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||||
pub(crate) mod fmt;
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||||
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||||
use core::cell::Cell;
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||||
use core::intrinsics::copy_nonoverlapping;
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||||
use core::mem::{size_of, MaybeUninit};
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||||
use embassy_usb::control::{self, ControlHandler, InResponse, OutResponse, Request};
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||||
use embassy_usb::driver::{Endpoint, EndpointError, EndpointIn, EndpointOut};
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||||
use embassy_usb::{driver::Driver, types::*, Builder};
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||||
|
||||
/// This should be used as `device_class` when building the `UsbDevice`.
|
||||
pub const USB_CLASS_CDC: u8 = 0x02;
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||||
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||||
const USB_CLASS_CDC_DATA: u8 = 0x0a;
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||||
const CDC_SUBCLASS_NCM: u8 = 0x0d;
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||||
|
||||
const CDC_PROTOCOL_NONE: u8 = 0x00;
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||||
const CDC_PROTOCOL_NTB: u8 = 0x01;
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||||
|
||||
const CS_INTERFACE: u8 = 0x24;
|
||||
const CDC_TYPE_HEADER: u8 = 0x00;
|
||||
const CDC_TYPE_UNION: u8 = 0x06;
|
||||
const CDC_TYPE_ETHERNET: u8 = 0x0F;
|
||||
const CDC_TYPE_NCM: u8 = 0x1A;
|
||||
|
||||
const REQ_SEND_ENCAPSULATED_COMMAND: u8 = 0x00;
|
||||
//const REQ_GET_ENCAPSULATED_COMMAND: u8 = 0x01;
|
||||
//const REQ_SET_ETHERNET_MULTICAST_FILTERS: u8 = 0x40;
|
||||
//const REQ_SET_ETHERNET_POWER_MANAGEMENT_PATTERN_FILTER: u8 = 0x41;
|
||||
//const REQ_GET_ETHERNET_POWER_MANAGEMENT_PATTERN_FILTER: u8 = 0x42;
|
||||
//const REQ_SET_ETHERNET_PACKET_FILTER: u8 = 0x43;
|
||||
//const REQ_GET_ETHERNET_STATISTIC: u8 = 0x44;
|
||||
const REQ_GET_NTB_PARAMETERS: u8 = 0x80;
|
||||
//const REQ_GET_NET_ADDRESS: u8 = 0x81;
|
||||
//const REQ_SET_NET_ADDRESS: u8 = 0x82;
|
||||
//const REQ_GET_NTB_FORMAT: u8 = 0x83;
|
||||
//const REQ_SET_NTB_FORMAT: u8 = 0x84;
|
||||
//const REQ_GET_NTB_INPUT_SIZE: u8 = 0x85;
|
||||
const REQ_SET_NTB_INPUT_SIZE: u8 = 0x86;
|
||||
//const REQ_GET_MAX_DATAGRAM_SIZE: u8 = 0x87;
|
||||
//const REQ_SET_MAX_DATAGRAM_SIZE: u8 = 0x88;
|
||||
//const REQ_GET_CRC_MODE: u8 = 0x89;
|
||||
//const REQ_SET_CRC_MODE: u8 = 0x8A;
|
||||
|
||||
//const NOTIF_MAX_PACKET_SIZE: u16 = 8;
|
||||
//const NOTIF_POLL_INTERVAL: u8 = 20;
|
||||
|
||||
const NTB_MAX_SIZE: usize = 2048;
|
||||
const SIG_NTH: u32 = 0x484d434e;
|
||||
const SIG_NDP_NO_FCS: u32 = 0x304d434e;
|
||||
const SIG_NDP_WITH_FCS: u32 = 0x314d434e;
|
||||
|
||||
const ALTERNATE_SETTING_DISABLED: u8 = 0x00;
|
||||
const ALTERNATE_SETTING_ENABLED: u8 = 0x01;
|
||||
|
||||
/// Simple NTB header (NTH+NDP all in one) for sending packets
|
||||
#[repr(packed)]
|
||||
#[allow(unused)]
|
||||
struct NtbOutHeader {
|
||||
// NTH
|
||||
nth_sig: u32,
|
||||
nth_len: u16,
|
||||
nth_seq: u16,
|
||||
nth_total_len: u16,
|
||||
nth_first_index: u16,
|
||||
|
||||
// NDP
|
||||
ndp_sig: u32,
|
||||
ndp_len: u16,
|
||||
ndp_next_index: u16,
|
||||
ndp_datagram_index: u16,
|
||||
ndp_datagram_len: u16,
|
||||
ndp_term1: u16,
|
||||
ndp_term2: u16,
|
||||
}
|
||||
|
||||
#[repr(packed)]
|
||||
#[allow(unused)]
|
||||
struct NtbParameters {
|
||||
length: u16,
|
||||
formats_supported: u16,
|
||||
in_params: NtbParametersDir,
|
||||
out_params: NtbParametersDir,
|
||||
}
|
||||
|
||||
#[repr(packed)]
|
||||
#[allow(unused)]
|
||||
struct NtbParametersDir {
|
||||
max_size: u32,
|
||||
divisor: u16,
|
||||
payload_remainder: u16,
|
||||
out_alignment: u16,
|
||||
max_datagram_count: u16,
|
||||
}
|
||||
|
||||
fn byteify<T>(buf: &mut [u8], data: T) -> &[u8] {
|
||||
let len = size_of::<T>();
|
||||
unsafe { copy_nonoverlapping(&data as *const _ as *const u8, buf.as_mut_ptr(), len) }
|
||||
&buf[..len]
|
||||
}
|
||||
|
||||
pub struct State<'a> {
|
||||
comm_control: MaybeUninit<CommControl<'a>>,
|
||||
data_control: MaybeUninit<DataControl>,
|
||||
shared: ControlShared,
|
||||
}
|
||||
|
||||
impl<'a> State<'a> {
|
||||
pub fn new() -> Self {
|
||||
Self {
|
||||
comm_control: MaybeUninit::uninit(),
|
||||
data_control: MaybeUninit::uninit(),
|
||||
shared: Default::default(),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Shared data between Control and CdcAcmClass
|
||||
struct ControlShared {
|
||||
mac_addr: Cell<[u8; 6]>,
|
||||
}
|
||||
|
||||
impl Default for ControlShared {
|
||||
fn default() -> Self {
|
||||
ControlShared {
|
||||
mac_addr: Cell::new([0; 6]),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
struct CommControl<'a> {
|
||||
mac_addr_string: StringIndex,
|
||||
shared: &'a ControlShared,
|
||||
}
|
||||
|
||||
impl<'d> ControlHandler for CommControl<'d> {
|
||||
fn control_out(&mut self, req: control::Request, _data: &[u8]) -> OutResponse {
|
||||
match req.request {
|
||||
REQ_SEND_ENCAPSULATED_COMMAND => {
|
||||
// We don't actually support encapsulated commands but pretend we do for standards
|
||||
// compatibility.
|
||||
OutResponse::Accepted
|
||||
}
|
||||
REQ_SET_NTB_INPUT_SIZE => {
|
||||
// TODO
|
||||
OutResponse::Accepted
|
||||
}
|
||||
_ => OutResponse::Rejected,
|
||||
}
|
||||
}
|
||||
|
||||
fn control_in<'a>(&'a mut self, req: Request, buf: &'a mut [u8]) -> InResponse<'a> {
|
||||
match req.request {
|
||||
REQ_GET_NTB_PARAMETERS => {
|
||||
let res = NtbParameters {
|
||||
length: size_of::<NtbParameters>() as _,
|
||||
formats_supported: 1, // only 16bit,
|
||||
in_params: NtbParametersDir {
|
||||
max_size: NTB_MAX_SIZE as _,
|
||||
divisor: 4,
|
||||
payload_remainder: 0,
|
||||
out_alignment: 4,
|
||||
max_datagram_count: 0, // not used
|
||||
},
|
||||
out_params: NtbParametersDir {
|
||||
max_size: NTB_MAX_SIZE as _,
|
||||
divisor: 4,
|
||||
payload_remainder: 0,
|
||||
out_alignment: 4,
|
||||
max_datagram_count: 1, // We only decode 1 packet per NTB
|
||||
},
|
||||
};
|
||||
InResponse::Accepted(byteify(buf, res))
|
||||
}
|
||||
_ => InResponse::Rejected,
|
||||
}
|
||||
}
|
||||
|
||||
fn get_string<'a>(
|
||||
&'a mut self,
|
||||
index: StringIndex,
|
||||
_lang_id: u16,
|
||||
buf: &'a mut [u8],
|
||||
) -> Option<&'a str> {
|
||||
if index == self.mac_addr_string {
|
||||
let mac_addr = self.shared.mac_addr.get();
|
||||
for i in 0..12 {
|
||||
let n = (mac_addr[i / 2] >> ((1 - i % 2) * 4)) & 0xF;
|
||||
buf[i] = match n {
|
||||
0x0..=0x9 => b'0' + n,
|
||||
0xA..=0xF => b'A' + n - 0xA,
|
||||
_ => unreachable!(),
|
||||
}
|
||||
}
|
||||
|
||||
Some(unsafe { core::str::from_utf8_unchecked(&buf[..12]) })
|
||||
} else {
|
||||
warn!("unknown string index requested");
|
||||
None
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
struct DataControl {}
|
||||
|
||||
impl ControlHandler for DataControl {
|
||||
fn set_alternate_setting(&mut self, alternate_setting: u8) {
|
||||
match alternate_setting {
|
||||
ALTERNATE_SETTING_ENABLED => info!("ncm: interface enabled"),
|
||||
ALTERNATE_SETTING_DISABLED => info!("ncm: interface disabled"),
|
||||
_ => unreachable!(),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub struct CdcNcmClass<'d, D: Driver<'d>> {
|
||||
_comm_if: InterfaceNumber,
|
||||
comm_ep: D::EndpointIn,
|
||||
|
||||
data_if: InterfaceNumber,
|
||||
read_ep: D::EndpointOut,
|
||||
write_ep: D::EndpointIn,
|
||||
|
||||
_control: &'d ControlShared,
|
||||
}
|
||||
|
||||
impl<'d, D: Driver<'d>> CdcNcmClass<'d, D> {
|
||||
pub fn new(
|
||||
builder: &mut Builder<'d, D>,
|
||||
state: &'d mut State<'d>,
|
||||
mac_address: [u8; 6],
|
||||
max_packet_size: u16,
|
||||
) -> Self {
|
||||
let control_shared = &state.shared;
|
||||
control_shared.mac_addr.set(mac_address);
|
||||
|
||||
let mut func = builder.function(USB_CLASS_CDC, CDC_SUBCLASS_NCM, CDC_PROTOCOL_NONE);
|
||||
|
||||
// Control interface
|
||||
let mut iface = func.interface();
|
||||
let mac_addr_string = iface.string();
|
||||
iface.handler(state.comm_control.write(CommControl {
|
||||
mac_addr_string,
|
||||
shared: &control_shared,
|
||||
}));
|
||||
let comm_if = iface.interface_number();
|
||||
let mut alt = iface.alt_setting(USB_CLASS_CDC, CDC_SUBCLASS_NCM, CDC_PROTOCOL_NONE);
|
||||
|
||||
alt.descriptor(
|
||||
CS_INTERFACE,
|
||||
&[
|
||||
CDC_TYPE_HEADER, // bDescriptorSubtype
|
||||
0x10,
|
||||
0x01, // bcdCDC (1.10)
|
||||
],
|
||||
);
|
||||
alt.descriptor(
|
||||
CS_INTERFACE,
|
||||
&[
|
||||
CDC_TYPE_UNION, // bDescriptorSubtype
|
||||
comm_if.into(), // bControlInterface
|
||||
u8::from(comm_if) + 1, // bSubordinateInterface
|
||||
],
|
||||
);
|
||||
alt.descriptor(
|
||||
CS_INTERFACE,
|
||||
&[
|
||||
CDC_TYPE_ETHERNET, // bDescriptorSubtype
|
||||
mac_addr_string.into(), // iMACAddress
|
||||
0, // bmEthernetStatistics
|
||||
0, // |
|
||||
0, // |
|
||||
0, // |
|
||||
0xea, // wMaxSegmentSize = 1514
|
||||
0x05, // |
|
||||
0, // wNumberMCFilters
|
||||
0, // |
|
||||
0, // bNumberPowerFilters
|
||||
],
|
||||
);
|
||||
alt.descriptor(
|
||||
CS_INTERFACE,
|
||||
&[
|
||||
CDC_TYPE_NCM, // bDescriptorSubtype
|
||||
0x00, // bcdNCMVersion
|
||||
0x01, // |
|
||||
0, // bmNetworkCapabilities
|
||||
],
|
||||
);
|
||||
|
||||
let comm_ep = alt.endpoint_interrupt_in(8, 255);
|
||||
|
||||
// Data interface
|
||||
let mut iface = func.interface();
|
||||
iface.handler(state.data_control.write(DataControl {}));
|
||||
let data_if = iface.interface_number();
|
||||
let _alt = iface.alt_setting(USB_CLASS_CDC_DATA, 0x00, CDC_PROTOCOL_NTB);
|
||||
let mut alt = iface.alt_setting(USB_CLASS_CDC_DATA, 0x00, CDC_PROTOCOL_NTB);
|
||||
let read_ep = alt.endpoint_bulk_out(max_packet_size);
|
||||
let write_ep = alt.endpoint_bulk_in(max_packet_size);
|
||||
|
||||
CdcNcmClass {
|
||||
_comm_if: comm_if,
|
||||
comm_ep,
|
||||
data_if,
|
||||
read_ep,
|
||||
write_ep,
|
||||
_control: control_shared,
|
||||
}
|
||||
}
|
||||
|
||||
pub fn split(self) -> (Sender<'d, D>, Receiver<'d, D>) {
|
||||
(
|
||||
Sender {
|
||||
write_ep: self.write_ep,
|
||||
seq: 0,
|
||||
},
|
||||
Receiver {
|
||||
data_if: self.data_if,
|
||||
comm_ep: self.comm_ep,
|
||||
read_ep: self.read_ep,
|
||||
},
|
||||
)
|
||||
}
|
||||
}
|
||||
|
||||
pub struct Sender<'d, D: Driver<'d>> {
|
||||
write_ep: D::EndpointIn,
|
||||
seq: u16,
|
||||
}
|
||||
|
||||
impl<'d, D: Driver<'d>> Sender<'d, D> {
|
||||
pub async fn write_packet(&mut self, data: &[u8]) -> Result<(), EndpointError> {
|
||||
let seq = self.seq;
|
||||
self.seq = self.seq.wrapping_add(1);
|
||||
|
||||
const MAX_PACKET_SIZE: usize = 64; // TODO unhardcode
|
||||
const OUT_HEADER_LEN: usize = 28;
|
||||
|
||||
let header = NtbOutHeader {
|
||||
nth_sig: SIG_NTH,
|
||||
nth_len: 0x0c,
|
||||
nth_seq: seq,
|
||||
nth_total_len: (data.len() + OUT_HEADER_LEN) as u16,
|
||||
nth_first_index: 0x0c,
|
||||
|
||||
ndp_sig: SIG_NDP_NO_FCS,
|
||||
ndp_len: 0x10,
|
||||
ndp_next_index: 0x00,
|
||||
ndp_datagram_index: OUT_HEADER_LEN as u16,
|
||||
ndp_datagram_len: data.len() as u16,
|
||||
ndp_term1: 0x00,
|
||||
ndp_term2: 0x00,
|
||||
};
|
||||
|
||||
// Build first packet on a buffer, send next packets straight from `data`.
|
||||
let mut buf = [0; MAX_PACKET_SIZE];
|
||||
let n = byteify(&mut buf, header);
|
||||
assert_eq!(n.len(), OUT_HEADER_LEN);
|
||||
|
||||
if OUT_HEADER_LEN + data.len() < MAX_PACKET_SIZE {
|
||||
// First packet is not full, just send it.
|
||||
// No need to send ZLP because it's short for sure.
|
||||
buf[OUT_HEADER_LEN..][..data.len()].copy_from_slice(data);
|
||||
self.write_ep
|
||||
.write(&buf[..OUT_HEADER_LEN + data.len()])
|
||||
.await?;
|
||||
} else {
|
||||
let (d1, d2) = data.split_at(MAX_PACKET_SIZE - OUT_HEADER_LEN);
|
||||
|
||||
buf[OUT_HEADER_LEN..].copy_from_slice(d1);
|
||||
self.write_ep.write(&buf).await?;
|
||||
|
||||
for chunk in d2.chunks(MAX_PACKET_SIZE) {
|
||||
self.write_ep.write(&chunk).await?;
|
||||
}
|
||||
|
||||
// Send ZLP if needed.
|
||||
if d2.len() % MAX_PACKET_SIZE == 0 {
|
||||
self.write_ep.write(&[]).await?;
|
||||
}
|
||||
}
|
||||
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
|
||||
pub struct Receiver<'d, D: Driver<'d>> {
|
||||
data_if: InterfaceNumber,
|
||||
comm_ep: D::EndpointIn,
|
||||
read_ep: D::EndpointOut,
|
||||
}
|
||||
|
||||
impl<'d, D: Driver<'d>> Receiver<'d, D> {
|
||||
/// Reads a single packet from the OUT endpoint.
|
||||
pub async fn read_packet(&mut self, buf: &mut [u8]) -> Result<usize, EndpointError> {
|
||||
// Retry loop
|
||||
loop {
|
||||
// read NTB
|
||||
let mut ntb = [0u8; NTB_MAX_SIZE];
|
||||
let mut pos = 0;
|
||||
loop {
|
||||
let n = self.read_ep.read(&mut ntb[pos..]).await?;
|
||||
pos += n;
|
||||
if n < self.read_ep.info().max_packet_size as usize || pos == NTB_MAX_SIZE {
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
let ntb = &ntb[..pos];
|
||||
|
||||
// Process NTB header (NTH)
|
||||
let nth = match ntb.get(..12) {
|
||||
Some(x) => x,
|
||||
None => {
|
||||
warn!("Received too short NTB");
|
||||
continue;
|
||||
}
|
||||
};
|
||||
let sig = u32::from_le_bytes(nth[0..4].try_into().unwrap());
|
||||
if sig != SIG_NTH {
|
||||
warn!("Received bad NTH sig.");
|
||||
continue;
|
||||
}
|
||||
let ndp_idx = u16::from_le_bytes(nth[10..12].try_into().unwrap()) as usize;
|
||||
|
||||
// Process NTB Datagram Pointer (NDP)
|
||||
let ndp = match ntb.get(ndp_idx..ndp_idx + 12) {
|
||||
Some(x) => x,
|
||||
None => {
|
||||
warn!("NTH has an NDP pointer out of range.");
|
||||
continue;
|
||||
}
|
||||
};
|
||||
let sig = u32::from_le_bytes(ndp[0..4].try_into().unwrap());
|
||||
if sig != SIG_NDP_NO_FCS && sig != SIG_NDP_WITH_FCS {
|
||||
warn!("Received bad NDP sig.");
|
||||
continue;
|
||||
}
|
||||
let datagram_index = u16::from_le_bytes(ndp[8..10].try_into().unwrap()) as usize;
|
||||
let datagram_len = u16::from_le_bytes(ndp[10..12].try_into().unwrap()) as usize;
|
||||
|
||||
if datagram_index == 0 || datagram_len == 0 {
|
||||
// empty, ignore. This is allowed by the spec, so don't warn.
|
||||
continue;
|
||||
}
|
||||
|
||||
// Process actual datagram, finally.
|
||||
let datagram = match ntb.get(datagram_index..datagram_index + datagram_len) {
|
||||
Some(x) => x,
|
||||
None => {
|
||||
warn!("NDP has a datagram pointer out of range.");
|
||||
continue;
|
||||
}
|
||||
};
|
||||
buf[..datagram_len].copy_from_slice(datagram);
|
||||
|
||||
return Ok(datagram_len);
|
||||
}
|
||||
}
|
||||
|
||||
/// Waits for the USB host to enable this interface
|
||||
pub async fn wait_connection(&mut self) -> Result<(), EndpointError> {
|
||||
loop {
|
||||
self.read_ep.wait_enabled().await;
|
||||
self.comm_ep.wait_enabled().await;
|
||||
|
||||
let buf = [
|
||||
0xA1, //bmRequestType
|
||||
0x00, //bNotificationType = NETWORK_CONNECTION
|
||||
0x01, // wValue = connected
|
||||
0x00,
|
||||
self.data_if.into(), // wIndex = interface
|
||||
0x00,
|
||||
0x00, // wLength
|
||||
0x00,
|
||||
];
|
||||
match self.comm_ep.write(&buf).await {
|
||||
Ok(()) => break, // Done!
|
||||
Err(EndpointError::Disabled) => {} // Got disabled again, wait again.
|
||||
Err(e) => return Err(e),
|
||||
}
|
||||
}
|
||||
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
@ -6,14 +6,16 @@ version = "0.1.0"
|
||||
|
||||
[features]
|
||||
default = ["nightly"]
|
||||
nightly = ["embassy-nrf/nightly", "embassy-nrf/unstable-traits", "embassy-usb", "embassy-usb-serial", "embassy-usb-hid"]
|
||||
nightly = ["embassy-nrf/nightly", "embassy-nrf/unstable-traits", "embassy-usb", "embassy-usb-serial", "embassy-usb-hid", "embassy-usb-ncm"]
|
||||
|
||||
[dependencies]
|
||||
embassy = { version = "0.1.0", path = "../../embassy", features = ["defmt", "defmt-timestamp-uptime"] }
|
||||
embassy-nrf = { version = "0.1.0", path = "../../embassy-nrf", features = ["defmt", "nrf52840", "time-driver-rtc1", "gpiote", "unstable-pac"] }
|
||||
embassy-net = { version = "0.1.0", path = "../../embassy-net", features = ["defmt", "tcp", "dhcpv4", "medium-ethernet", "pool-16"] }
|
||||
embassy-usb = { version = "0.1.0", path = "../../embassy-usb", features = ["defmt"], optional = true }
|
||||
embassy-usb-serial = { version = "0.1.0", path = "../../embassy-usb-serial", features = ["defmt"], optional = true }
|
||||
embassy-usb-hid = { version = "0.1.0", path = "../../embassy-usb-hid", features = ["defmt"], optional = true }
|
||||
embassy-usb-ncm = { version = "0.1.0", path = "../../embassy-usb-ncm", features = ["defmt"], optional = true }
|
||||
|
||||
defmt = "0.3"
|
||||
defmt-rtt = "0.3"
|
||||
|
||||
277
examples/nrf/src/bin/usb_ethernet.rs
Normal file
277
examples/nrf/src/bin/usb_ethernet.rs
Normal file
@ -0,0 +1,277 @@
|
||||
#![no_std]
|
||||
#![no_main]
|
||||
#![feature(generic_associated_types)]
|
||||
#![feature(type_alias_impl_trait)]
|
||||
|
||||
use core::mem;
|
||||
use core::sync::atomic::{AtomicBool, Ordering};
|
||||
use core::task::Waker;
|
||||
use defmt::*;
|
||||
use embassy::blocking_mutex::raw::ThreadModeRawMutex;
|
||||
use embassy::channel::Channel;
|
||||
use embassy::executor::Spawner;
|
||||
use embassy::io::{AsyncBufReadExt, AsyncWriteExt};
|
||||
use embassy::util::Forever;
|
||||
use embassy_net::{PacketBox, PacketBoxExt, PacketBuf, TcpSocket};
|
||||
use embassy_nrf::pac;
|
||||
use embassy_nrf::usb::Driver;
|
||||
use embassy_nrf::Peripherals;
|
||||
use embassy_nrf::{interrupt, peripherals};
|
||||
use embassy_usb::{Builder, Config, UsbDevice};
|
||||
use embassy_usb_ncm::{CdcNcmClass, Receiver, Sender, State};
|
||||
|
||||
use defmt_rtt as _; // global logger
|
||||
use panic_probe as _;
|
||||
|
||||
type MyDriver = Driver<'static, peripherals::USBD>;
|
||||
|
||||
#[embassy::task]
|
||||
async fn usb_task(mut device: UsbDevice<'static, MyDriver>) -> ! {
|
||||
device.run().await
|
||||
}
|
||||
|
||||
#[embassy::task]
|
||||
async fn usb_ncm_rx_task(mut class: Receiver<'static, MyDriver>) {
|
||||
loop {
|
||||
warn!("WAITING for connection");
|
||||
LINK_UP.store(false, Ordering::Relaxed);
|
||||
|
||||
class.wait_connection().await.unwrap();
|
||||
|
||||
warn!("Connected");
|
||||
LINK_UP.store(true, Ordering::Relaxed);
|
||||
|
||||
loop {
|
||||
let mut p = unwrap!(PacketBox::new(embassy_net::Packet::new()));
|
||||
let n = match class.read_packet(&mut p[..]).await {
|
||||
Ok(n) => n,
|
||||
Err(e) => {
|
||||
warn!("error reading packet: {:?}", e);
|
||||
break;
|
||||
}
|
||||
};
|
||||
|
||||
let buf = p.slice(0..n);
|
||||
if RX_CHANNEL.try_send(buf).is_err() {
|
||||
warn!("Failed pushing rx'd packet to channel.");
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[embassy::task]
|
||||
async fn usb_ncm_tx_task(mut class: Sender<'static, MyDriver>) {
|
||||
loop {
|
||||
let pkt = TX_CHANNEL.recv().await;
|
||||
if let Err(e) = class.write_packet(&pkt[..]).await {
|
||||
warn!("Failed to TX packet: {:?}", e);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[embassy::task]
|
||||
async fn net_task() -> ! {
|
||||
embassy_net::run().await
|
||||
}
|
||||
|
||||
#[embassy::main]
|
||||
async fn main(spawner: Spawner, p: Peripherals) {
|
||||
let clock: pac::CLOCK = unsafe { mem::transmute(()) };
|
||||
let power: pac::POWER = unsafe { mem::transmute(()) };
|
||||
|
||||
info!("Enabling ext hfosc...");
|
||||
clock.tasks_hfclkstart.write(|w| unsafe { w.bits(1) });
|
||||
while clock.events_hfclkstarted.read().bits() != 1 {}
|
||||
|
||||
info!("Waiting for vbus...");
|
||||
while !power.usbregstatus.read().vbusdetect().is_vbus_present() {}
|
||||
info!("vbus OK");
|
||||
|
||||
// Create the driver, from the HAL.
|
||||
let irq = interrupt::take!(USBD);
|
||||
let driver = Driver::new(p.USBD, irq);
|
||||
|
||||
// Create embassy-usb Config
|
||||
let mut config = Config::new(0xc0de, 0xcafe);
|
||||
config.manufacturer = Some("Embassy");
|
||||
config.product = Some("USB-Ethernet example");
|
||||
config.serial_number = Some("12345678");
|
||||
config.max_power = 100;
|
||||
config.max_packet_size_0 = 64;
|
||||
|
||||
// Required for Windows support.
|
||||
config.composite_with_iads = true;
|
||||
config.device_class = 0xEF;
|
||||
config.device_sub_class = 0x02;
|
||||
config.device_protocol = 0x01;
|
||||
|
||||
struct Resources {
|
||||
device_descriptor: [u8; 256],
|
||||
config_descriptor: [u8; 256],
|
||||
bos_descriptor: [u8; 256],
|
||||
control_buf: [u8; 128],
|
||||
serial_state: State<'static>,
|
||||
}
|
||||
static RESOURCES: Forever<Resources> = Forever::new();
|
||||
let res = RESOURCES.put(Resources {
|
||||
device_descriptor: [0; 256],
|
||||
config_descriptor: [0; 256],
|
||||
bos_descriptor: [0; 256],
|
||||
control_buf: [0; 128],
|
||||
serial_state: State::new(),
|
||||
});
|
||||
|
||||
// Create embassy-usb DeviceBuilder using the driver and config.
|
||||
let mut builder = Builder::new(
|
||||
driver,
|
||||
config,
|
||||
&mut res.device_descriptor,
|
||||
&mut res.config_descriptor,
|
||||
&mut res.bos_descriptor,
|
||||
&mut res.control_buf,
|
||||
None,
|
||||
);
|
||||
|
||||
// WARNINGS for Android ethernet tethering:
|
||||
// - On Pixel 4a, it refused to work on Android 11, worked on Android 12.
|
||||
// - if the host's MAC address has the "locally-administered" bit set (bit 1 of first byte),
|
||||
// it doesn't work! The "Ethernet tethering" option in settings doesn't get enabled.
|
||||
// This is due to regex spaghetti: https://android.googlesource.com/platform/frameworks/base/+/refs/tags/android-mainline-12.0.0_r84/core/res/res/values/config.xml#417
|
||||
// and this nonsense in the linux kernel: https://github.com/torvalds/linux/blob/c00c5e1d157bec0ef0b0b59aa5482eb8dc7e8e49/drivers/net/usb/usbnet.c#L1751-L1757
|
||||
|
||||
// Our MAC addr.
|
||||
let our_mac_addr = [0xCC, 0xCC, 0xCC, 0xCC, 0xCC, 0xCC];
|
||||
// Host's MAC addr. This is the MAC the host "thinks" its USB-to-ethernet adapter has.
|
||||
let host_mac_addr = [0x88, 0x88, 0x88, 0x88, 0x88, 0x88];
|
||||
|
||||
// Create classes on the builder.
|
||||
let class = CdcNcmClass::new(&mut builder, &mut res.serial_state, host_mac_addr, 64);
|
||||
|
||||
// Build the builder.
|
||||
let usb = builder.build();
|
||||
|
||||
unwrap!(spawner.spawn(usb_task(usb)));
|
||||
|
||||
let (tx, rx) = class.split();
|
||||
unwrap!(spawner.spawn(usb_ncm_rx_task(rx)));
|
||||
unwrap!(spawner.spawn(usb_ncm_tx_task(tx)));
|
||||
|
||||
// Init embassy-net
|
||||
struct NetResources {
|
||||
resources: embassy_net::StackResources<1, 2, 8>,
|
||||
configurator: embassy_net::DhcpConfigurator,
|
||||
//configurator: StaticConfigurator,
|
||||
device: Device,
|
||||
}
|
||||
static NET_RESOURCES: Forever<NetResources> = Forever::new();
|
||||
let res = NET_RESOURCES.put(NetResources {
|
||||
resources: embassy_net::StackResources::new(),
|
||||
configurator: embassy_net::DhcpConfigurator::new(),
|
||||
//configurator: embassy_net::StaticConfigurator::new(embassy_net::Config {
|
||||
// address: Ipv4Cidr::new(Ipv4Address::new(10, 42, 0, 1), 24),
|
||||
// dns_servers: Default::default(),
|
||||
// gateway: None,
|
||||
//}),
|
||||
device: Device {
|
||||
mac_addr: our_mac_addr,
|
||||
},
|
||||
});
|
||||
embassy_net::init(&mut res.device, &mut res.configurator, &mut res.resources);
|
||||
unwrap!(spawner.spawn(net_task()));
|
||||
|
||||
// And now we can use it!
|
||||
|
||||
let mut rx_buffer = [0; 4096];
|
||||
let mut tx_buffer = [0; 4096];
|
||||
let mut buf = [0; 4096];
|
||||
|
||||
loop {
|
||||
let mut socket = TcpSocket::new(&mut rx_buffer, &mut tx_buffer);
|
||||
socket.set_timeout(Some(embassy_net::SmolDuration::from_secs(10)));
|
||||
|
||||
info!("Listening on TCP:1234...");
|
||||
if let Err(e) = socket.accept(1234).await {
|
||||
warn!("accept error: {:?}", e);
|
||||
continue;
|
||||
}
|
||||
|
||||
info!("Received connection from {:?}", socket.remote_endpoint());
|
||||
|
||||
loop {
|
||||
let n = match socket.read(&mut buf).await {
|
||||
Ok(0) => {
|
||||
warn!("read EOF");
|
||||
break;
|
||||
}
|
||||
Ok(n) => n,
|
||||
Err(e) => {
|
||||
warn!("read error: {:?}", e);
|
||||
break;
|
||||
}
|
||||
};
|
||||
|
||||
info!("rxd {:02x}", &buf[..n]);
|
||||
|
||||
match socket.write_all(&buf[..n]).await {
|
||||
Ok(()) => {}
|
||||
Err(e) => {
|
||||
warn!("write error: {:?}", e);
|
||||
break;
|
||||
}
|
||||
};
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static TX_CHANNEL: Channel<ThreadModeRawMutex, PacketBuf, 8> = Channel::new();
|
||||
static RX_CHANNEL: Channel<ThreadModeRawMutex, PacketBuf, 8> = Channel::new();
|
||||
static LINK_UP: AtomicBool = AtomicBool::new(false);
|
||||
|
||||
struct Device {
|
||||
mac_addr: [u8; 6],
|
||||
}
|
||||
|
||||
impl embassy_net::Device for Device {
|
||||
fn register_waker(&mut self, waker: &Waker) {
|
||||
// loopy loopy wakey wakey
|
||||
waker.wake_by_ref()
|
||||
}
|
||||
|
||||
fn link_state(&mut self) -> embassy_net::LinkState {
|
||||
match LINK_UP.load(Ordering::Relaxed) {
|
||||
true => embassy_net::LinkState::Up,
|
||||
false => embassy_net::LinkState::Down,
|
||||
}
|
||||
}
|
||||
|
||||
fn capabilities(&mut self) -> embassy_net::DeviceCapabilities {
|
||||
let mut caps = embassy_net::DeviceCapabilities::default();
|
||||
caps.max_transmission_unit = 1514; // 1500 IP + 14 ethernet header
|
||||
caps.medium = embassy_net::Medium::Ethernet;
|
||||
caps
|
||||
}
|
||||
|
||||
fn is_transmit_ready(&mut self) -> bool {
|
||||
true
|
||||
}
|
||||
|
||||
fn transmit(&mut self, pkt: PacketBuf) {
|
||||
if TX_CHANNEL.try_send(pkt).is_err() {
|
||||
warn!("TX failed")
|
||||
}
|
||||
}
|
||||
|
||||
fn receive<'a>(&mut self) -> Option<PacketBuf> {
|
||||
RX_CHANNEL.try_recv().ok()
|
||||
}
|
||||
|
||||
fn ethernet_address(&mut self) -> [u8; 6] {
|
||||
self.mac_addr
|
||||
}
|
||||
}
|
||||
|
||||
#[no_mangle]
|
||||
fn _embassy_rand(buf: &mut [u8]) {
|
||||
// TODO
|
||||
buf.fill(0x42)
|
||||
}
|
||||
@ -59,8 +59,8 @@ async fn main(_spawner: Spawner, p: Peripherals) {
|
||||
|
||||
// Create embassy-usb Config
|
||||
let mut config = Config::new(0xc0de, 0xcafe);
|
||||
config.manufacturer = Some("Tactile Engineering");
|
||||
config.product = Some("Testy");
|
||||
config.manufacturer = Some("Embassy");
|
||||
config.product = Some("HID keyboard example");
|
||||
config.serial_number = Some("12345678");
|
||||
config.max_power = 100;
|
||||
config.max_packet_size_0 = 64;
|
||||
|
||||
@ -39,10 +39,11 @@ async fn main(_spawner: Spawner, p: Peripherals) {
|
||||
|
||||
// Create embassy-usb Config
|
||||
let mut config = Config::new(0xc0de, 0xcafe);
|
||||
config.manufacturer = Some("Tactile Engineering");
|
||||
config.product = Some("Testy");
|
||||
config.manufacturer = Some("Embassy");
|
||||
config.product = Some("HID mouse example");
|
||||
config.serial_number = Some("12345678");
|
||||
config.max_power = 100;
|
||||
config.max_packet_size_0 = 64;
|
||||
|
||||
// Create embassy-usb DeviceBuilder using the driver and config.
|
||||
// It needs some buffers for building the descriptors.
|
||||
|
||||
@ -36,7 +36,12 @@ async fn main(_spawner: Spawner, p: Peripherals) {
|
||||
let driver = Driver::new(p.USBD, irq);
|
||||
|
||||
// Create embassy-usb Config
|
||||
let config = Config::new(0xc0de, 0xcafe);
|
||||
let mut config = Config::new(0xc0de, 0xcafe);
|
||||
config.manufacturer = Some("Embassy");
|
||||
config.product = Some("USB-serial example");
|
||||
config.serial_number = Some("12345678");
|
||||
config.max_power = 100;
|
||||
config.max_packet_size_0 = 64;
|
||||
|
||||
// Create embassy-usb DeviceBuilder using the driver and config.
|
||||
// It needs some buffers for building the descriptors.
|
||||
|
||||
@ -53,7 +53,12 @@ async fn main(spawner: Spawner, p: Peripherals) {
|
||||
let driver = Driver::new(p.USBD, irq);
|
||||
|
||||
// Create embassy-usb Config
|
||||
let config = Config::new(0xc0de, 0xcafe);
|
||||
let mut config = Config::new(0xc0de, 0xcafe);
|
||||
config.manufacturer = Some("Embassy");
|
||||
config.product = Some("USB-serial example");
|
||||
config.serial_number = Some("12345678");
|
||||
config.max_power = 100;
|
||||
config.max_packet_size_0 = 64;
|
||||
|
||||
struct Resources {
|
||||
device_descriptor: [u8; 256],
|
||||
|
||||
Loading…
Reference in New Issue
Block a user