diff --git a/embassy/Cargo.toml b/embassy/Cargo.toml
index facff51f6c97d58347d3852f490fb461f203644c..13c66565e8109fd0b28266191d3a414f6ec8564f 100644
--- a/embassy/Cargo.toml
+++ b/embassy/Cargo.toml
@@ -4,8 +4,8 @@ version = "0.2.0-alpha"
edition = "2021"
[dependencies]
-# embassy-time = { version = "0.1.0", features = ["defmt", "defmt-timestamp-uptime"] }
embassy-sync = { version = "0.1.0" }
-# embassy-futures = { version = "0.1.0" }
sunset = { path = "../" }
+
+log = { version = "0.4" }
diff --git a/embassy/README.md b/embassy/README.md
new file mode 100644
index 0000000000000000000000000000000000000000..20bb87214bbd2a29747c771527f565cafb5a66ce
--- /dev/null
+++ b/embassy/README.md
@@ -0,0 +1,27 @@
+# Toolchain
+
+Embassy requires Rust nightly, often with a specific version. [`rust-toolchain.toml`] records a known-good version.
+
+# Demos
+
+[`demos/`] has some examples. These are separate crates since they have fairly distinct dependencies.
+
+## `picow`
+
+Running on a Raspberry Pi Pico W.
+
+Requires a capacitor soldered between a GPIO pin and gnd, 0.1 to 1 nF is suitable, this example uses GPIO Pin 10.
+This is used for random number generation - it is somewhat experimental and should have more analysis
+of the RNG quality before use in real applications.
+
+## `std`
+
+Running on the host system, useful for development and debugging.
+The network stack is smoltcp with a `tap` device. Based on Embassy's `examples/std/src/tuntap.rs`, it needs
+local network setup something like
+
+```sh
+sudo ip tuntap add name tap0 mode tap user $USER
+sudo ip link set tap0 up
+sudo ip addr add 10.9.0.1/16 dev tap0
+```
diff --git a/embassy/demos/picow/Cargo.lock b/embassy/demos/picow/Cargo.lock
index 630f4a3d0fea0286d11031b2655940d820d1969b..6ff60eb49e881c63e7a183506ab4368084176fbc 100644
--- a/embassy/demos/picow/Cargo.lock
+++ b/embassy/demos/picow/Cargo.lock
@@ -1318,16 +1318,8 @@ dependencies = [
]
[[package]]
-name = "sunset-embassy"
-version = "0.2.0-alpha"
-dependencies = [
- "embassy-sync 0.1.0",
- "sunset",
-]
-
-[[package]]
-name = "sunset-picow"
-version = "0.2.0-alpha"
+name = "sunset-demo-embassy-picow"
+version = "0.1.0"
dependencies = [
"atomic-polyfill 0.1.10",
"caprand",
@@ -1358,6 +1350,15 @@ dependencies = [
"sunset-embassy",
]
+[[package]]
+name = "sunset-embassy"
+version = "0.2.0-alpha"
+dependencies = [
+ "embassy-sync 0.1.0",
+ "log",
+ "sunset",
+]
+
[[package]]
name = "sunset-sshwire-derive"
version = "0.1.0"
diff --git a/embassy/demos/picow/Cargo.toml b/embassy/demos/picow/Cargo.toml
index 8452039a42d483d75bc36fd4987eb606d737ab12..367297c45a39bffcbceeb9353f33d339c00f7587 100644
--- a/embassy/demos/picow/Cargo.toml
+++ b/embassy/demos/picow/Cargo.toml
@@ -1,6 +1,6 @@
[package]
-name = "sunset-picow"
-version = "0.2.0-alpha"
+name = "sunset-demo-embassy-picow"
+version = "0.1.0"
edition = "2021"
[workspace]
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index 0000000000000000000000000000000000000000..b21166f260ad2383614933b36f1643ad44a52746
--- /dev/null
+++ b/embassy/demos/std/Cargo.lock
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+]
+
+[[package]]
+name = "semver"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e25dfac463d778e353db5be2449d1cce89bd6fd23c9f1ea21310ce6e5a1b29c4"
+
+[[package]]
+name = "semver-parser"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
+
+[[package]]
+name = "sha2"
+version = "0.9.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4d58a1e1bf39749807d89cf2d98ac2dfa0ff1cb3faa38fbb64dd88ac8013d800"
+dependencies = [
+ "block-buffer 0.9.0",
+ "cfg-if",
+ "cpufeatures",
+ "digest 0.9.0",
+ "opaque-debug",
+]
+
+[[package]]
+name = "sha2"
+version = "0.10.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "82e6b795fe2e3b1e845bafcb27aa35405c4d47cdfc92af5fc8d3002f76cebdc0"
+dependencies = [
+ "cfg-if",
+ "cpufeatures",
+ "digest 0.10.5",
+]
+
+[[package]]
+name = "signature"
+version = "1.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "74233d3b3b2f6d4b006dc19dee745e73e2a6bfb6f93607cd3b02bd5b00797d7c"
+
+[[package]]
+name = "slab"
+version = "0.4.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4614a76b2a8be0058caa9dbbaf66d988527d86d003c11a94fbd335d7661edcef"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
+name = "smoltcp"
+version = "0.8.0"
+source = "git+https://github.com/smoltcp-rs/smoltcp?rev=ed0cf16750a42f30e31fcaf5347915592924b1e3#ed0cf16750a42f30e31fcaf5347915592924b1e3"
+dependencies = [
+ "bitflags",
+ "byteorder",
+ "cfg-if",
+ "heapless",
+ "managed",
+]
+
+[[package]]
+name = "snafu"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a152ba99b054b22972ee794cf04e5ef572da1229e33b65f3c57abbff0525a454"
+dependencies = [
+ "doc-comment",
+ "snafu-derive",
+]
+
+[[package]]
+name = "snafu-derive"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d5e79cdebbabaebb06a9bdbaedc7f159b410461f63611d4d0e3fb0fab8fed850"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "socket2"
+version = "0.4.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02e2d2db9033d13a1567121ddd7a095ee144db4e1ca1b1bda3419bc0da294ebd"
+dependencies = [
+ "libc",
+ "winapi",
+]
+
+[[package]]
+name = "spin"
+version = "0.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f6002a767bff9e83f8eeecf883ecb8011875a21ae8da43bffb817a57e78cc09"
+dependencies = [
+ "lock_api",
+]
+
+[[package]]
+name = "ssh-key"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f02d3730e8785e797a4552137d1acc0d7f7146dad3b5fe65ed83637711dfc6c5"
+dependencies = [
+ "base64ct",
+ "ed25519-dalek",
+ "pem-rfc7468",
+ "rand_core 0.6.4",
+ "sec1",
+ "sha2 0.10.6",
+ "zeroize",
+]
+
+[[package]]
+name = "stable_deref_trait"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a8f112729512f8e442d81f95a8a7ddf2b7c6b8a1a6f509a95864142b30cab2d3"
+
+[[package]]
+name = "static_cell"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e4c37c250d21f53fa7165e76e5401d7e6539c211a8d2cf449e3962956a5cc2ce"
+dependencies = [
+ "atomic-polyfill 1.0.1",
+]
+
+[[package]]
+name = "strsim"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
+
+[[package]]
+name = "subtle"
+version = "2.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6bdef32e8150c2a081110b42772ffe7d7c9032b606bc226c8260fd97e0976601"
+
+[[package]]
+name = "sunset"
+version = "0.2.0-alpha"
+dependencies = [
+ "aes",
+ "ascii",
+ "chacha20",
+ "ctr",
+ "digest 0.10.5",
+ "heapless",
+ "hmac",
+ "log",
+ "no-panic",
+ "poly1305",
+ "pretty-hex",
+ "rand",
+ "rand_core 0.6.4",
+ "salty",
+ "sha2 0.10.6",
+ "signature",
+ "snafu",
+ "ssh-key",
+ "sunset-sshwire-derive",
+]
+
+[[package]]
+name = "sunset-demo-embassy-std"
+version = "0.1.0"
+dependencies = [
+ "async-io",
+ "atomic-polyfill 0.1.10",
+ "critical-section 1.1.1",
+ "embassy-executor",
+ "embassy-futures",
+ "embassy-net",
+ "embassy-sync 0.1.0",
+ "embassy-time",
+ "embedded-hal 1.0.0-alpha.9",
+ "embedded-hal-async",
+ "embedded-io",
+ "env_logger",
+ "futures",
+ "heapless",
+ "libc",
+ "log",
+ "rand",
+ "sha2 0.10.6",
+ "static_cell",
+ "sunset",
+ "sunset-embassy",
+]
+
+[[package]]
+name = "sunset-embassy"
+version = "0.2.0-alpha"
+dependencies = [
+ "embassy-sync 0.1.0",
+ "log",
+ "sunset",
+]
+
+[[package]]
+name = "sunset-sshwire-derive"
+version = "0.1.0"
+dependencies = [
+ "virtue",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.103"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a864042229133ada95abf3b54fdc62ef5ccabe9515b64717bcb9a1919e59445d"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "synstructure"
+version = "0.12.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f36bdaa60a83aca3921b5259d5400cbf5e90fc51931376a9bd4a0eb79aa7210f"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "unicode-xid",
+]
+
+[[package]]
+name = "termcolor"
+version = "1.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bab24d30b911b2376f3a13cc2cd443142f0c81dda04c118693e35b3835757755"
+dependencies = [
+ "winapi-util",
+]
+
+[[package]]
+name = "typenum"
+version = "1.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dcf81ac59edc17cc8697ff311e8f5ef2d99fcbd9817b34cec66f90b6c3dfd987"
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ceab39d59e4c9499d4e5a8ee0e2735b891bb7308ac83dfb4e80cad195c9f6f3"
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f962df74c8c05a667b5ee8bcf162993134c104e96440b663c8daa176dc772d8c"
+
+[[package]]
+name = "universal-hash"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9f214e8f697e925001e66ec2c6e37a4ef93f0f78c2eed7814394e10c62025b05"
+dependencies = [
+ "generic-array 0.14.6",
+ "subtle",
+]
+
+[[package]]
+name = "vcell"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77439c1b53d2303b20d9459b1ade71a83c716e3f9c34f3228c00e6f185d6c002"
+
+[[package]]
+name = "version_check"
+version = "0.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
+
+[[package]]
+name = "virtue"
+version = "0.0.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "147139c5605d9869d47d3cd1a42dcbb624a29dd7de93aa84a01d448903bd828c"
+
+[[package]]
+name = "void"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
+
+[[package]]
+name = "volatile-register"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ee8f19f9d74293faf70901bc20ad067dc1ad390d2cbf1e3f75f721ffee908b6"
+dependencies = [
+ "vcell",
+]
+
+[[package]]
+name = "waker-fn"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9d5b2c62b4012a3e1eca5a7e077d13b3bf498c4073e33ccd58626607748ceeca"
+
+[[package]]
+name = "wasi"
+version = "0.11.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
+
+[[package]]
+name = "wepoll-ffi"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d743fdedc5c64377b5fc2bc036b01c7fd642205a0d96356034ae3404d49eb7fb"
+dependencies = [
+ "cc",
+]
+
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-util"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "zeroize"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4756f7db3f7b5574938c3eb1c117038b8e07f95ee6718c0efad4ac21508f1efd"
+dependencies = [
+ "zeroize_derive",
+]
+
+[[package]]
+name = "zeroize_derive"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f8f187641dad4f680d25c4bfc4225b418165984179f26ca76ec4fb6441d3a17"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "synstructure",
+]
diff --git a/embassy/demos/std/Cargo.toml b/embassy/demos/std/Cargo.toml
new file mode 100644
index 0000000000000000000000000000000000000000..c1ec25b5dd21dc6a352e671d176c0c6d34e74e9d
--- /dev/null
+++ b/embassy/demos/std/Cargo.toml
@@ -0,0 +1,74 @@
+[package]
+name = "sunset-demo-embassy-std"
+version = "0.1.0"
+edition = "2021"
+
+[workspace]
+# blank
+
+[dependencies]
+embassy-executor = { version = "0.1.0", features = ["log", "std", "nightly", "integrated-timers"] }
+embassy-time = { version = "0.1.0", features = ["log", "std"] }
+embassy-net = { version = "0.1.0", features = ["log", "tcp", "dhcpv4", "medium-ethernet", "pool-16"] }
+embassy-sync = { version = "0.1.0" }
+embassy-futures = { version = "0.1.0" }
+atomic-polyfill = "0.1.5"
+static_cell = "1.0"
+
+futures = { version = "0.3.17", default-features = false, features = ["async-await", "cfg-target-has-atomic", "unstable"] }
+log = { version = "0.4" }
+env_logger = "0.9.0"
+
+embedded-hal-1 = { package = "embedded-hal", version = "1.0.0-alpha.8" }
+embedded-hal-async = { version = "0.1.0-alpha.2" }
+embedded-io = { version = "0.3.0", features = ["async", "defmt"] }
+heapless = "0.7.15"
+
+# for tuntap
+libc = "0.2.101"
+async-io = "1.6.0"
+
+sunset-embassy = { path = "../../" }
+sunset = { path = "../../.." }
+
+critical-section = "1.1"
+rand = { version = "0.8", default-features = false, features = ["getrandom"] }
+sha2 = { version = "0.10", default-features = false }
+
+[patch.crates-io]
+embassy-executor = { git = "https://github.com/embassy-rs/embassy", rev = "e7fdd500d8354a03fcd105c8298cf7b4798a4107" }
+embassy-time = { git = "https://github.com/embassy-rs/embassy", rev = "e7fdd500d8354a03fcd105c8298cf7b4798a4107" }
+embassy-futures = { git = "https://github.com/embassy-rs/embassy", rev = "e7fdd500d8354a03fcd105c8298cf7b4798a4107" }
+# embassy-sync = { git = "https://github.com/embassy-rs/embassy", rev = "e7fdd500d8354a03fcd105c8298cf7b4798a4107" }
+embassy-net = { git = "https://github.com/embassy-rs/embassy", rev = "e7fdd500d8354a03fcd105c8298cf7b4798a4107" }
+embassy-sync = { path = "/home/matt/3rd/rs/embassy/embassy-sync" }
+
+[profile.dev]
+debug = 2
+debug-assertions = true
+opt-level = 1
+overflow-checks = true
+
+[profile.release]
+codegen-units = 1
+debug = 2
+debug-assertions = false
+incremental = false
+lto = 'fat'
+opt-level = 'z'
+overflow-checks = false
+
+# do not optimize proc-macro crates = faster builds from scratch
+[profile.dev.build-override]
+codegen-units = 8
+debug = false
+debug-assertions = false
+opt-level = 0
+overflow-checks = false
+
+[profile.release.build-override]
+codegen-units = 8
+debug = false
+debug-assertions = false
+opt-level = 0
+overflow-checks = false
diff --git a/embassy/demos/std/rust-toolchain.toml b/embassy/demos/std/rust-toolchain.toml
new file mode 100644
index 0000000000000000000000000000000000000000..a35a11b82158a63714cf5cf8adfb4127073429af
--- /dev/null
+++ b/embassy/demos/std/rust-toolchain.toml
@@ -0,0 +1,8 @@
+# Before upgrading check that everything is available on all tier1 targets here:
+# https://rust-lang.github.io/rustup-components-history
+[toolchain]
+channel = "nightly-2022-09-22"
+components = [ "rust-src", "rustfmt" ]
+targets = [
+ "thumbv6m-none-eabi",
+]
diff --git a/embassy/demos/std/src/main.rs b/embassy/demos/std/src/main.rs
new file mode 100644
index 0000000000000000000000000000000000000000..f91efedec2aa90ed6e8ba346db7a174c799cf309
--- /dev/null
+++ b/embassy/demos/std/src/main.rs
@@ -0,0 +1,275 @@
+#![feature(type_alias_impl_trait)]
+
+#[allow(unused_imports)]
+use {
+ log::{debug, error, info, log, trace, warn},
+};
+
+use core::future::Future;
+
+use core::todo;
+use embassy_executor::{Spawner, Executor};
+use embassy_sync::mutex::Mutex;
+use embassy_sync::blocking_mutex::raw::NoopRawMutex;
+use embassy_net::tcp::TcpSocket;
+use embassy_net::{Stack, StackResources, ConfigStrategy};
+use embassy_futures::join::join3;
+use embedded_io::asynch::{Read, Write};
+use static_cell::StaticCell;
+
+use core::str::FromStr;
+use core::cell::RefCell;
+use core::num::NonZeroU32;
+use futures::{task::noop_waker_ref,pending};
+use core::task::{Context,Poll,Waker,RawWaker,RawWakerVTable};
+
+use rand::rngs::OsRng;
+use rand::RngCore;
+
+use sunset::*;
+use sunset_embassy::SSHServer;
+
+use crate::tuntap::TunTapDevice;
+
+mod tuntap;
+
+const NUM_LISTENERS: usize = 4;
+
+macro_rules! singleton {
+ ($val:expr) => {{
+ type T = impl Sized;
+ static STATIC_CELL: StaticCell<T> = StaticCell::new();
+ STATIC_CELL.init_with(move || $val)
+ }};
+}
+
+// fn run() -> sunset::Result<()> {
+// let mut x = [0u8; 500];
+
+// let mut inbuf = [0u8; 1000];
+// let mut outbuf = [0u8; 1000];
+// let mut runner = sunset::Runner::new_server(&mut inbuf, &mut outbuf)?;
+// let mut cli = SSHClient {};
+// let mut cli = sunset::Behaviour::new_client(&mut cli);
+
+// let mut pollctx = Context::from_waker(noop_waker_ref());
+
+// runner.input(&x)?;
+// let l = runner.progress(&mut cli);
+// pin_mut!(l);
+// let _ = l.poll(&mut pollctx);
+// // runner.output(&mut x).unwrap();
+
+// // tx.write(b'x').unwrap();
+// // write!(tx, "{}", x[0]);
+
+// Ok(())
+// }
+
+#[embassy_executor::task]
+async fn net_task(stack: &'static Stack<TunTapDevice>) -> ! {
+ stack.run().await
+}
+
+#[embassy_executor::task]
+async fn main_task(spawner: Spawner) {
+ info!("Hello World!");
+
+ // TODO config
+ let opt_tap0 = "tap0";
+ let config = ConfigStrategy::Dhcp;
+
+ // Init network device
+ let device = TunTapDevice::new(opt_tap0).unwrap();
+
+
+ let seed = OsRng.next_u64();
+
+ // Init network stack
+ let stack = &*singleton!(Stack::new(
+ device,
+ config,
+ singleton!(StackResources::<1, 10, 8>::new()),
+ seed
+ ));
+
+ // Launch network task
+ spawner.spawn(net_task(stack)).unwrap();
+
+ for _ in 0..NUM_LISTENERS {
+ spawner.spawn(listener(stack)).unwrap();
+ }
+}
+
+// TODO: pool_size should be NUM_LISTENERS but needs a literal
+#[embassy_executor::task(pool_size = 4)]
+async fn listener(stack: &'static Stack<TunTapDevice>) -> ! {
+ let mut rx_buffer = [0; 4096];
+ let mut tx_buffer = [0; 4096];
+
+ loop {
+ let mut socket = TcpSocket::new(stack, &mut rx_buffer, &mut tx_buffer);
+ socket.set_timeout(Some(embassy_net::SmolDuration::from_secs(10)));
+
+ info!("Listening on TCP:22...");
+ if let Err(e) = socket.accept(22).await {
+ warn!("accept error: {:?}", e);
+ continue;
+ }
+
+ let r = session(&mut socket).await;
+ if let Err(_e) = r {
+ // warn!("Ended with error: {:?}", e);
+ warn!("Ended with error");
+ }
+ }
+}
+
+struct DemoServer {
+ // keys: Vec<SignKey>,
+
+ sess: Option<u32>,
+ want_shell: bool,
+ shell_started: bool,
+}
+
+impl DemoServer {
+ fn new() -> Result<Self> {
+ // let keys = keyfiles.iter().map(|f| {
+ // read_key(f).with_context(|| format!("loading key {f}"))
+ // }).collect::<Result<Vec<SignKey>>>()?;
+
+ Ok(Self {
+ sess: None,
+ // keys,
+ want_shell: false,
+ shell_started: false,
+ })
+ }
+}
+
+impl ServBehaviour for DemoServer {
+ fn hostkeys(&mut self) -> BhResult<&[SignKey]> {
+ todo!()
+ // Ok(&self.keys)
+ }
+
+
+ fn have_auth_password(&self, user: TextString) -> bool {
+ true
+ }
+
+ fn have_auth_pubkey(&self, user: TextString) -> bool {
+ true
+ }
+
+ fn auth_password(&mut self, user: TextString, password: TextString) -> bool {
+ user.as_str().unwrap_or("") == "matt" && password.as_str().unwrap_or("") == "pw"
+ }
+
+ // fn auth_pubkey(&mut self, user: TextString, pubkey: &PubKey) -> bool {
+ // if user.as_str().unwrap_or("") != "matt" {
+ // return false
+ // }
+
+ // // key is tested1
+ // pubkey.matches_openssh("ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMkNdReJERy1rPGqdfTN73TnayPR+lTNhdZvOgkAOs5x")
+ // .unwrap_or_else(|e| {
+ // warn!("Failed loading openssh key: {e}");
+ // false
+ // })
+ // }
+
+ fn open_session(&mut self, chan: u32) -> ChanOpened {
+ if self.sess.is_some() {
+ ChanOpened::Failure(ChanFail::SSH_OPEN_ADMINISTRATIVELY_PROHIBITED)
+ } else {
+ self.sess = Some(chan);
+ ChanOpened::Success
+ }
+ }
+
+ fn sess_shell(&mut self, chan: u32) -> bool {
+ let r = !self.want_shell && self.sess == Some(chan);
+ self.want_shell = true;
+ trace!("req want shell");
+ r
+ }
+
+ fn sess_pty(&mut self, chan: u32, _pty: &Pty) -> bool {
+ self.sess == Some(chan)
+ }
+}
+
+async fn session(socket: &mut TcpSocket<'_>) -> sunset::Result<()> {
+ let mut app = DemoServer::new()?;
+
+ let mut ssh_rxbuf = [0; 1024];
+ let mut ssh_txbuf = [0; 1024];
+ let serv = SSHServer::new(&mut ssh_rxbuf, &mut ssh_txbuf, &mut app)?;
+ let serv = &serv;
+
+ let app = Mutex::<NoopRawMutex, _>::new(app);
+
+ let (mut rsock, mut wsock) = socket.split();
+
+ let tx = async {
+ loop {
+ // TODO: make sunset read directly from socket, no intermediate buffer.
+ let mut buf = [0; 1024];
+ trace!("tx read");
+ let l = serv.read(&mut buf).await?;
+ trace!("tx read done");
+ let mut buf = &buf[..l];
+ while buf.len() > 0 {
+ let n = wsock.write(buf).await.expect("TODO handle write error");
+ buf = &buf[n..];
+ }
+ }
+ #[allow(unreachable_code)]
+ Ok::<_, sunset::Error>(())
+ };
+
+ let rx = async {
+ loop {
+ // TODO: make sunset read directly from socket, no intermediate buffer.
+ let mut buf = [0; 1024];
+ trace!("rx read");
+ let l = rsock.read(&mut buf).await.expect("TODO handle read error");
+ trace!("rx read done");
+ let mut buf = &buf[..l];
+ while buf.len() > 0 {
+ let n = serv.write(&buf).await?;
+ buf = &buf[n..];
+ }
+ }
+ #[allow(unreachable_code)]
+ Ok::<_, sunset::Error>(())
+ };
+
+ let prog = async {
+ loop {
+ serv.progress(&app).await?;
+ }
+ #[allow(unreachable_code)]
+ Ok::<_, sunset::Error>(())
+ };
+ join3(rx, tx, prog).await;
+
+ Ok(())
+}
+
+static EXECUTOR: StaticCell<Executor> = StaticCell::new();
+
+fn main() {
+ env_logger::builder()
+ .filter_level(log::LevelFilter::Trace)
+ .filter_module("async_io", log::LevelFilter::Info)
+ .format_timestamp_nanos()
+ .init();
+
+ let executor = EXECUTOR.init(Executor::new());
+ executor.run(|spawner| {
+ spawner.spawn(main_task(spawner)).unwrap();
+ });
+}
diff --git a/embassy/demos/std/src/tuntap.rs b/embassy/demos/std/src/tuntap.rs
new file mode 100644
index 0000000000000000000000000000000000000000..a0cace7f7700e523198f665ba79a9fb66c424018
--- /dev/null
+++ b/embassy/demos/std/src/tuntap.rs
@@ -0,0 +1,221 @@
+use std::io;
+use std::io::{Read, Write};
+use std::os::unix::io::{AsRawFd, RawFd};
+
+use async_io::Async;
+use log::*;
+
+pub const SIOCGIFMTU: libc::c_ulong = 0x8921;
+pub const _SIOCGIFINDEX: libc::c_ulong = 0x8933;
+pub const _ETH_P_ALL: libc::c_short = 0x0003;
+pub const TUNSETIFF: libc::c_ulong = 0x400454CA;
+pub const _IFF_TUN: libc::c_int = 0x0001;
+pub const IFF_TAP: libc::c_int = 0x0002;
+pub const IFF_NO_PI: libc::c_int = 0x1000;
+
+const ETHERNET_HEADER_LEN: usize = 14;
+
+#[repr(C)]
+#[derive(Debug)]
+struct ifreq {
+ ifr_name: [libc::c_char; libc::IF_NAMESIZE],
+ ifr_data: libc::c_int, /* ifr_ifindex or ifr_mtu */
+}
+
+fn ifreq_for(name: &str) -> ifreq {
+ let mut ifreq = ifreq {
+ ifr_name: [0; libc::IF_NAMESIZE],
+ ifr_data: 0,
+ };
+ for (i, byte) in name.as_bytes().iter().enumerate() {
+ ifreq.ifr_name[i] = *byte as libc::c_char
+ }
+ ifreq
+}
+
+fn ifreq_ioctl(lower: libc::c_int, ifreq: &mut ifreq, cmd: libc::c_ulong) -> io::Result<libc::c_int> {
+ unsafe {
+ let res = libc::ioctl(lower, cmd as _, ifreq as *mut ifreq);
+ if res == -1 {
+ return Err(io::Error::last_os_error());
+ }
+ }
+
+ Ok(ifreq.ifr_data)
+}
+
+#[derive(Debug)]
+pub struct TunTap {
+ fd: libc::c_int,
+ mtu: usize,
+}
+
+impl AsRawFd for TunTap {
+ fn as_raw_fd(&self) -> RawFd {
+ self.fd
+ }
+}
+
+impl TunTap {
+ pub fn new(name: &str) -> io::Result<TunTap> {
+ unsafe {
+ let fd = libc::open(
+ "/dev/net/tun\0".as_ptr() as *const libc::c_char,
+ libc::O_RDWR | libc::O_NONBLOCK,
+ );
+ if fd == -1 {
+ return Err(io::Error::last_os_error());
+ }
+
+ let mut ifreq = ifreq_for(name);
+ ifreq.ifr_data = IFF_TAP | IFF_NO_PI;
+ ifreq_ioctl(fd, &mut ifreq, TUNSETIFF)?;
+
+ let socket = libc::socket(libc::AF_INET, libc::SOCK_DGRAM, libc::IPPROTO_IP);
+ if socket == -1 {
+ return Err(io::Error::last_os_error());
+ }
+
+ let ip_mtu = ifreq_ioctl(socket, &mut ifreq, SIOCGIFMTU);
+ libc::close(socket);
+ let ip_mtu = ip_mtu? as usize;
+
+ // SIOCGIFMTU returns the IP MTU (typically 1500 bytes.)
+ // smoltcp counts the entire Ethernet packet in the MTU, so add the Ethernet header size to it.
+ let mtu = ip_mtu + ETHERNET_HEADER_LEN;
+
+ Ok(TunTap { fd, mtu })
+ }
+ }
+}
+
+impl Drop for TunTap {
+ fn drop(&mut self) {
+ unsafe {
+ libc::close(self.fd);
+ }
+ }
+}
+
+impl io::Read for TunTap {
+ fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+ let len = unsafe { libc::read(self.fd, buf.as_mut_ptr() as *mut libc::c_void, buf.len()) };
+ if len == -1 {
+ Err(io::Error::last_os_error())
+ } else {
+ Ok(len as usize)
+ }
+ }
+}
+
+impl io::Write for TunTap {
+ fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+ let len = unsafe { libc::write(self.fd, buf.as_ptr() as *mut libc::c_void, buf.len()) };
+ if len == -1 {
+ Err(io::Error::last_os_error())
+ } else {
+ Ok(len as usize)
+ }
+ }
+
+ fn flush(&mut self) -> io::Result<()> {
+ Ok(())
+ }
+}
+
+pub struct TunTapDevice {
+ device: Async<TunTap>,
+ waker: Option<Waker>,
+}
+
+impl TunTapDevice {
+ pub fn new(name: &str) -> io::Result<TunTapDevice> {
+ Ok(Self {
+ device: Async::new(TunTap::new(name)?)?,
+ waker: None,
+ })
+ }
+}
+
+use core::task::Waker;
+use std::task::Context;
+
+use embassy_net::{Device, DeviceCapabilities, LinkState, Packet, PacketBox, PacketBoxExt, PacketBuf};
+
+impl Device for TunTapDevice {
+ fn is_transmit_ready(&mut self) -> bool {
+ true
+ }
+
+ fn transmit(&mut self, pkt: PacketBuf) {
+ // todo handle WouldBlock
+ match self.device.get_mut().write(&pkt) {
+ Ok(_) => {}
+ Err(e) if e.kind() == io::ErrorKind::WouldBlock => {
+ info!("transmit WouldBlock");
+ }
+ Err(e) => panic!("transmit error: {:?}", e),
+ }
+ }
+
+ fn receive(&mut self) -> Option<PacketBuf> {
+ let mut pkt = PacketBox::new(Packet::new()).unwrap();
+ loop {
+ match self.device.get_mut().read(&mut pkt[..]) {
+ Ok(n) => {
+ return Some(pkt.slice(0..n));
+ }
+ Err(e) if e.kind() == io::ErrorKind::WouldBlock => {
+ let ready = if let Some(w) = self.waker.as_ref() {
+ let mut cx = Context::from_waker(w);
+ self.device.poll_readable(&mut cx).is_ready()
+ } else {
+ false
+ };
+ if !ready {
+ return None;
+ }
+ }
+ Err(e) => panic!("read error: {:?}", e),
+ }
+ }
+ }
+
+ fn register_waker(&mut self, w: &Waker) {
+ match self.waker {
+ // Optimization: If both the old and new Wakers wake the same task, we can simply
+ // keep the old waker, skipping the clone. (In most executor implementations,
+ // cloning a waker is somewhat expensive, comparable to cloning an Arc).
+ Some(ref w2) if (w2.will_wake(w)) => {}
+ _ => {
+ // clone the new waker and store it
+ if let Some(old_waker) = core::mem::replace(&mut self.waker, Some(w.clone())) {
+ // We had a waker registered for another task. Wake it, so the other task can
+ // reregister itself if it's still interested.
+ //
+ // If two tasks are waiting on the same thing concurrently, this will cause them
+ // to wake each other in a loop fighting over this WakerRegistration. This wastes
+ // CPU but things will still work.
+ //
+ // If the user wants to have two tasks waiting on the same thing they should use
+ // a more appropriate primitive that can store multiple wakers.
+ old_waker.wake()
+ }
+ }
+ }
+ }
+
+ fn capabilities(&self) -> DeviceCapabilities {
+ let mut caps = DeviceCapabilities::default();
+ caps.max_transmission_unit = self.device.get_ref().mtu;
+ caps
+ }
+
+ fn link_state(&mut self) -> LinkState {
+ LinkState::Up
+ }
+
+ fn ethernet_address(&self) -> [u8; 6] {
+ [0x02, 0x03, 0x04, 0x05, 0x06, 0x07]
+ }
+}
diff --git a/embassy/src/embassy_sunset.rs b/embassy/src/embassy_sunset.rs
index e81a64de1c297ebae2f967a9c15c9de7616adc01..fb2e342f7e04f4b0307dee9021a21ebf5e63d0b2 100644
--- a/embassy/src/embassy_sunset.rs
+++ b/embassy/src/embassy_sunset.rs
@@ -1,3 +1,8 @@
+#[allow(unused_imports)]
+use {
+ log::{debug, error, info, log, trace, warn},
+};
+
use core::future::poll_fn;
use core::task::Poll;