nordic-dev.net/embassy
2
0
Fork 0
mirror of https://github.com/embassy-rs/embassy.git synced 2024-11-25 08:12:30 +00:00
Code Issues Packages Projects Releases Wiki Activity

🌈

Browse Source
This commit is contained in:
Dario Nieuwenhuis 2021-02-03 05:09:37 +01:00
commit cb5931d583
20 changed files with 1793 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
.gitignore vendored Normal file
View File

@ -0,0 +1,3 @@
/target
Cargo.lock
third_party

48
Cargo.toml Normal file
View File

@ -0,0 +1,48 @@
[workspace]
members = [
"embassy-net",
"embassy-net-examples",
]
exclude = [
"third_party"
]
[profile.dev]
codegen-units = 1
debug = 2
debug-assertions = true
incremental = false
opt-level = 3
overflow-checks = true
[profile.release]
codegen-units = 1
debug = 2
debug-assertions = false
incremental = false
lto = "fat"
opt-level = 's'
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
[patch.crates-io]
embassy = { git = "https://github.com/akiles/embassy" }
embassy-std = { git = "https://github.com/akiles/embassy" }
embassy-macros = { git = "https://github.com/akiles/embassy" }
smoltcp = { git = "https://github.com/akiles/smoltcp" }

201
LICENSE-APACHE Normal file
View File

@ -0,0 +1,201 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
excluding communication that is conspicuously marked or otherwise
designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
publicly display, publicly perform, sublicense, and distribute the
Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
by such Contributor that are necessarily infringed by their
Contribution(s) alone or by combination of their Contribution(s)
with the Work to which such Contribution(s) was submitted. If You
institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work
or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
the Derivative Works; and
(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
include a readable copy of the attribution notices contained
within such NOTICE file, excluding those notices that do not
pertain to any part of the Derivative Works, in at least one
of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
documentation, if provided along with the Derivative Works; or,
within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
or as an addendum to the NOTICE text from the Work, provided
that such additional attribution notices cannot be construed
as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright [yyyy] [name of copyright owner]
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

25
LICENSE-MIT Normal file
View File

@ -0,0 +1,25 @@
Copyright (c) 2020 Dario Nieuwenhuis
Permission is hereby granted, free of charge, to any
person obtaining a copy of this software and associated
documentation files (the "Software"), to deal in the
Software without restriction, including without
limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software
is furnished to do so, subject to the following
conditions:
The above copyright notice and this permission notice
shall be included in all copies or substantial portions
of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

34
README.md Normal file
View File

@ -0,0 +1,34 @@
# embassy-net
embassy-net contains an async network API based on smoltcp and embassy, designed
for embedded systems.
## Running the example
First, create the tap0 interface. You only need to do this once.
```sh
sudo ip tuntap add name tap0 mode tap user $USER
sudo ip link set tap0 up
sudo ip addr add 192.168.69.100/24 dev tap0
sudo ip -6 addr add fe80::100/64 dev tap0
sudo ip -6 addr add fdaa::100/64 dev tap0
sudo ip -6 route add fe80::/64 dev tap0
sudo ip -6 route add fdaa::/64 dev tap0
```
Then, run it
```sh
cargo run --bin embassy-net-examples
```
## License
This work is licensed under either of
- Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or
http://www.apache.org/licenses/LICENSE-2.0)
- MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
at your option.

17
embassy-net-examples/Cargo.toml Normal file
View File

@ -0,0 +1,17 @@
[package]
name = "embassy-net-examples"
version = "0.1.0"
authors = ["Dario Nieuwenhuis <dirbaio@dirbaio.net>"]
edition = "2018"
[dependencies]
heapless = { version = "0.5.6", default-features = false }
embassy = { version = "0.1.0", features=["std", "log"] }
embassy-std = { version = "0.1.0" }
embassy-net = { version = "0.1.0", path = "../embassy-net", features=["std", "log"] }
env_logger = "0.8.2"
log = "0.4.11"
futures = "0.3.8"
libc = "0.2.81"
async-io = "1.3.1"
smoltcp = { version = "0.6.0", default-features = false }

79
embassy-net-examples/src/main.rs Normal file
View File

@ -0,0 +1,79 @@
#![feature(type_alias_impl_trait)]
use embassy::executor::{Spawner, task};
use embassy::io::{AsyncBufReadExt, AsyncWriteExt};
use embassy::time::{Duration, Timer};
use embassy::util::Forever;
use embassy_net::*;
use embassy_std::Executor;
use heapless::Vec;
use log::*;
mod tuntap;
use crate::tuntap::TunTapDevice;
static DEVICE: Forever<TunTapDevice> = Forever::new();
static CONFIG: Forever<StaticConfigurator> = Forever::new();
#[task]
async fn net_task() {
embassy_net::run().await
}
#[task]
async fn main_task(spawner: Spawner) {
// Init network device
let device = TunTapDevice::new("tap0").unwrap();
// Static IP configuration
let config = StaticConfigurator::new(UpConfig {
address: Ipv4Cidr::new(Ipv4Address::new(192, 168, 69, 1), 24),
dns_servers: Vec::new(),
gateway: Ipv4Address::new(192, 168, 69, 100),
});
// Init network stack
embassy_net::init(DEVICE.put(device), CONFIG.put(config));
// Launch network task
spawner.spawn(net_task()).unwrap();
// Then we can use it!
let mut rx_buffer = [0; 4096];
let mut tx_buffer = [0; 4096];
let mut socket = TcpSocket::new(&mut rx_buffer, &mut tx_buffer);
socket.set_timeout(Some(embassy_net::SmolDuration::from_secs(10)));
let remote_endpoint = (Ipv4Address::new(192, 168, 69, 100), 8000);
info!("connecting to {:?}...", remote_endpoint);
let r = socket.connect(remote_endpoint).await;
if let Err(e) = r {
warn!("connect error: {:?}", e);
return;
}
info!("connected!");
loop {
let r = socket.write_all(b"Hello!\n").await;
if let Err(e) = r {
warn!("write error: {:?}", e);
return;
}
}
}
static EXECUTOR: Forever<Executor> = Forever::new();
fn main() {
env_logger::builder()
.filter_level(log::LevelFilter::Debug)
.filter_module("async_io", log::LevelFilter::Info)
.format_timestamp_nanos()
.init();
let executor = EXECUTOR.put(Executor::new());
executor.run(|spawner| {
spawner.spawn(main_task(spawner)).unwrap();
});
}

200
embassy-net-examples/src/tuntap.rs Normal file
View File

@ -0,0 +1,200 @@
use async_io::Async;
use embassy::util::WakerRegistration;
use libc;
use smoltcp::wire::EthernetFrame;
use std::io;
use std::io::{Read, Write};
use std::os::unix::io::{AsRawFd, RawFd};
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;
#[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,
ifreq: ifreq,
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 + EthernetFrame::<&[u8]>::header_len();
Ok(TunTap { fd, mtu, ifreq })
}
}
}
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: WakerRegistration,
}
impl TunTapDevice {
pub fn new(name: &str) -> io::Result<TunTapDevice> {
Ok(Self {
device: Async::new(TunTap::new(name)?)?,
waker: WakerRegistration::new(),
})
}
}
use embassy_net::{LinkState, DeviceCapabilities, Packet, PacketBox, PacketBuf};
use core::task::Waker;
impl crate::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(mut cx) = self.waker.context() {
let ready = self.device.poll_readable(&mut cx).is_ready();
ready
} else {
false
};
if !ready {
return None;
}
}
Err(e) => panic!("read error: {:?}", e),
}
}
}
fn register_waker(&mut self, waker: &Waker) {
self.waker.register(waker)
}
fn capabilities(&mut 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
}
}

46
embassy-net/Cargo.toml Normal file
View File

@ -0,0 +1,46 @@
[package]
name = "embassy-net"
version = "0.1.0"
authors = ["Dario Nieuwenhuis <dirbaio@dirbaio.net>"]
edition = "2018"
[features]
std = []
defmt-trace = []
defmt-debug = []
defmt-info = []
defmt-warn = []
defmt-error = []
[dependencies]
defmt = { version = "0.1.3", optional = true }
log = { version = "0.4.11", optional = true }
embassy = { version = "0.1.0" }
managed = { version = "0.8.0", default-features = false, features = [ "map" ]}
heapless = { version = "0.5.6", default-features = false }
as-slice = { version = "0.1.4" }
generic-array = { version = "0.14.4", default-features = false }
stable_deref_trait = { version = "1.2.0", default-features = false }
futures = { version = "0.3.5", default-features = false, features = [ "async-await" ]}
[dependencies.smoltcp]
version = "0.6.0"
#git = "https://github.com/akiles/smoltcp"
#rev = "00952e2c5cdf5667a1dfb6142258055f58d3851c"
default-features = false
features = [
"medium-ethernet",
"medium-ip",
"proto-ipv4",
"proto-dhcpv4",
#"proto-igmp",
#"proto-ipv6",
#"socket-raw",
#"socket-icmp",
#"socket-udp",
"socket-tcp",
"async",
]

80
embassy-net/src/config/dhcp.rs Normal file
View File

@ -0,0 +1,80 @@
use embassy::util::Forever;
use heapless::consts::*;
use heapless::Vec;
use smoltcp::dhcp::Dhcpv4Client;
use smoltcp::socket::{RawPacketMetadata, RawSocketBuffer};
use smoltcp::time::Instant;
use smoltcp::wire::{Ipv4Address, Ipv4Cidr};
use super::*;
use crate::{device::LinkState, fmt::*};
use crate::{Interface, SocketSet};
pub struct DhcpResources {
rx_buffer: [u8; 900],
tx_buffer: [u8; 600],
rx_meta: [RawPacketMetadata; 1],
tx_meta: [RawPacketMetadata; 1],
}
pub struct DhcpConfigurator {
client: Option<Dhcpv4Client>,
}
impl DhcpConfigurator {
pub fn new() -> Self {
Self { client: None }
}
}
static DHCP_RESOURCES: Forever<DhcpResources> = Forever::new();
impl Configurator for DhcpConfigurator {
fn poll(
&mut self,
iface: &mut Interface,
sockets: &mut SocketSet,
timestamp: Instant,
) -> Option<Config> {
if self.client.is_none() {
let res = DHCP_RESOURCES.put(DhcpResources {
rx_buffer: [0; 900],
tx_buffer: [0; 600],
rx_meta: [RawPacketMetadata::EMPTY; 1],
tx_meta: [RawPacketMetadata::EMPTY; 1],
});
let rx_buffer = RawSocketBuffer::new(&mut res.rx_meta[..], &mut res.rx_buffer[..]);
let tx_buffer = RawSocketBuffer::new(&mut res.tx_meta[..], &mut res.tx_buffer[..]);
let dhcp = Dhcpv4Client::new(sockets, rx_buffer, tx_buffer, timestamp);
info!("created dhcp");
self.client = Some(dhcp)
}
let client = self.client.as_mut().unwrap();
let link_up = iface.device_mut().device.link_state() == LinkState::Up;
if !link_up {
client.reset(timestamp);
return Some(Config::Down);
}
let config = client.poll(iface, sockets, timestamp).unwrap_or(None)?;
if config.address.is_none() {
return Some(Config::Down);
}
let mut dns_servers = Vec::new();
for s in &config.dns_servers {
if let Some(addr) = s {
dns_servers.push(addr.clone()).unwrap();
}
}
return Some(Config::Up(UpConfig {
address: config.address.unwrap(),
gateway: config.router.unwrap_or(Ipv4Address::UNSPECIFIED),
dns_servers,
}));
}
}

34
embassy-net/src/config/mod.rs Normal file
View File

@ -0,0 +1,34 @@
use heapless::consts::*;
use heapless::Vec;
use smoltcp::time::Instant;
use smoltcp::wire::{Ipv4Address, Ipv4Cidr};
use crate::fmt::*;
use crate::{Interface, SocketSet};
mod dhcp;
mod statik;
pub use dhcp::DhcpConfigurator;
pub use statik::StaticConfigurator;
#[derive(Debug, Clone)]
pub enum Config {
Down,
Up(UpConfig),
}
#[derive(Debug, Clone)]
pub struct UpConfig {
pub address: Ipv4Cidr,
pub gateway: Ipv4Address,
pub dns_servers: Vec<Ipv4Address, U3>,
}
pub trait Configurator {
fn poll(
&mut self,
iface: &mut Interface,
sockets: &mut SocketSet,
timestamp: Instant,
) -> Option<Config>;
}

26
embassy-net/src/config/statik.rs Normal file
View File

@ -0,0 +1,26 @@
use smoltcp::time::Instant;
use super::*;
use crate::fmt::*;
use crate::{Interface, SocketSet};
pub struct StaticConfigurator {
config: UpConfig,
}
impl StaticConfigurator {
pub fn new(config: UpConfig) -> Self {
Self { config }
}
}
impl Configurator for StaticConfigurator {
fn poll(
&mut self,
_iface: &mut Interface,
_sockets: &mut SocketSet,
_timestamp: Instant,
) -> Option<Config> {
Some(Config::Up(self.config.clone()))
}
}

103
embassy-net/src/device.rs Normal file
View File

@ -0,0 +1,103 @@
use core::task::{Poll, Waker};
use smoltcp::phy::Device as SmolDevice;
use smoltcp::phy::DeviceCapabilities;
use smoltcp::time::Instant as SmolInstant;
use smoltcp::Result;
use crate::fmt::*;
use crate::{Packet, PacketBox, PacketBuf};
#[derive(PartialEq, Eq, Clone, Copy)]
pub enum LinkState {
Down,
Up,
}
pub trait Device {
fn is_transmit_ready(&mut self) -> bool;
fn transmit(&mut self, pkt: PacketBuf);
fn receive(&mut self) -> Option<PacketBuf>;
fn register_waker(&mut self, waker: &Waker);
fn capabilities(&mut self) -> DeviceCapabilities;
fn link_state(&mut self) -> LinkState;
}
pub struct DeviceAdapter {
pub device: &'static mut dyn Device,
caps: DeviceCapabilities,
}
impl DeviceAdapter {
pub(crate) fn new(device: &'static mut dyn Device) -> Self {
Self {
caps: device.capabilities(),
device,
}
}
}
impl<'a> SmolDevice<'a> for DeviceAdapter {
type RxToken = RxToken;
type TxToken = TxToken<'a>;
fn receive(&'a mut self) -> Option<(Self::RxToken, Self::TxToken)> {
let rx_pkt = self.device.receive()?;
let tx_pkt = PacketBox::new(Packet::new()).unwrap(); // TODO: not sure about unwrap
let rx_token = RxToken { pkt: rx_pkt };
let tx_token = TxToken {
device: self.device,
pkt: tx_pkt,
};
Some((rx_token, tx_token))
}
/// Construct a transmit token.
fn transmit(&'a mut self) -> Option<Self::TxToken> {
if !self.device.is_transmit_ready() {
return None;
}
let tx_pkt = PacketBox::new(Packet::new())?;
Some(TxToken {
device: self.device,
pkt: tx_pkt,
})
}
/// Get a description of device capabilities.
fn capabilities(&self) -> DeviceCapabilities {
self.caps.clone()
}
}
pub struct RxToken {
pkt: PacketBuf,
}
impl smoltcp::phy::RxToken for RxToken {
fn consume<R, F>(mut self, _timestamp: SmolInstant, f: F) -> Result<R>
where
F: FnOnce(&mut [u8]) -> Result<R>,
{
f(&mut self.pkt)
}
}
pub struct TxToken<'a> {
device: &'a mut dyn Device,
pkt: PacketBox,
}
impl<'a> smoltcp::phy::TxToken for TxToken<'a> {
fn consume<R, F>(mut self, _timestamp: SmolInstant, len: usize, f: F) -> Result<R>
where
F: FnOnce(&mut [u8]) -> Result<R>,
{
let mut buf = self.pkt.slice(0..len);
let r = f(&mut buf)?;
self.device.transmit(buf);
Ok(r)
}
}

118
embassy-net/src/fmt.rs Normal file
View File

@ -0,0 +1,118 @@
#![macro_use]
#[cfg(all(feature = "defmt", feature = "log"))]
compile_error!("You may not enable both `defmt` and `log` features.");
pub use fmt::*;
#[cfg(feature = "defmt")]
mod fmt {
pub use defmt::{
assert, assert_eq, assert_ne, debug, debug_assert, debug_assert_eq, debug_assert_ne, error,
info, panic, todo, trace, unreachable, unwrap, warn,
};
}
#[cfg(feature = "log")]
mod fmt {
pub use core::{
assert, assert_eq, assert_ne, debug_assert, debug_assert_eq, debug_assert_ne, panic, todo,
unreachable,
};
pub use log::{debug, error, info, trace, warn};
}
#[cfg(not(any(feature = "defmt", feature = "log")))]
mod fmt {
#![macro_use]
pub use core::{
assert, assert_eq, assert_ne, debug_assert, debug_assert_eq, debug_assert_ne, panic, todo,
unreachable,
};
#[macro_export]
macro_rules! trace {
($($msg:expr),+ $(,)?) => {
()
};
}
#[macro_export]
macro_rules! debug {
($($msg:expr),+ $(,)?) => {
()
};
}
#[macro_export]
macro_rules! info {
($($msg:expr),+ $(,)?) => {
()
};
}
#[macro_export]
macro_rules! warn {
($($msg:expr),+ $(,)?) => {
()
};
}
#[macro_export]
macro_rules! error {
($($msg:expr),+ $(,)?) => {
()
};
}
}
#[cfg(not(feature = "defmt"))]
#[macro_export]
macro_rules! unwrap {
($arg:expr) => {
match $crate::fmt::Try::into_result($arg) {
::core::result::Result::Ok(t) => t,
::core::result::Result::Err(e) => {
::core::panic!("unwrap of `{}` failed: {:?}", ::core::stringify!($arg), e);
}
}
};
($arg:expr, $($msg:expr),+ $(,)? ) => {
match $crate::fmt::Try::into_result($arg) {
::core::result::Result::Ok(t) => t,
::core::result::Result::Err(e) => {
::core::panic!("unwrap of `{}` failed: {}: {:?}", ::core::stringify!($arg), ::core::format_args!($($msg,)*), e);
}
}
}
}
#[derive(Debug, Copy, Clone, Eq, PartialEq)]
pub struct NoneError;
pub trait Try {
type Ok;
type Error;
fn into_result(self) -> Result<Self::Ok, Self::Error>;
}
impl<T> Try for Option<T> {
type Ok = T;
type Error = NoneError;
#[inline]
fn into_result(self) -> Result<T, NoneError> {
self.ok_or(NoneError)
}
}
impl<T, E> Try for Result<T, E> {
type Ok = T;
type Error = E;
#[inline]
fn into_result(self) -> Self {
self
}
}

31
embassy-net/src/lib.rs Normal file
View File

@ -0,0 +1,31 @@
#![cfg_attr(not(feature = "std"), no_std)]
#![feature(const_fn)]
#![feature(const_in_array_repeat_expressions)]
#![feature(const_generics)]
#![feature(const_evaluatable_checked)]
#![allow(incomplete_features)]
// This mod MUST go first, so that the others see its macros.
pub(crate) mod fmt;
mod pool; // TODO extract to embassy, or to own crate
mod config;
mod device;
mod packet_pool;
mod stack;
mod tcp_socket;
pub use config::{Config, Configurator, DhcpConfigurator, StaticConfigurator, UpConfig};
pub use device::{Device, LinkState};
pub use packet_pool::{Packet, PacketBox, PacketBuf};
pub use stack::{init, is_init, run};
pub use tcp_socket::TcpSocket;
// smoltcp reexports
pub use smoltcp::phy::{DeviceCapabilities, Medium};
pub use smoltcp::time::Duration as SmolDuration;
pub use smoltcp::time::Instant as SmolInstant;
pub use smoltcp::wire::{IpAddress, IpCidr, Ipv4Address, Ipv4Cidr};
pub type Interface = smoltcp::iface::Interface<'static, device::DeviceAdapter>;
pub type SocketSet = smoltcp::socket::SocketSet<'static>;

88
embassy-net/src/packet_pool.rs Normal file
View File

@ -0,0 +1,88 @@
use as_slice::{AsMutSlice, AsSlice};
use core::ops::{Deref, DerefMut, Range};
use super::pool::{BitPool, Box, StaticPool};
pub const MTU: usize = 1514;
pub const PACKET_POOL_SIZE: usize = 4;
pool!(pub PacketPool: [Packet; PACKET_POOL_SIZE]);
pub type PacketBox = Box<PacketPool>;
pub struct Packet(pub [u8; MTU]);
impl Packet {
pub const fn new() -> Self {
Self([0; MTU])
}
}
impl Box<PacketPool> {
pub fn slice(self, range: Range<usize>) -> PacketBuf {
PacketBuf {
packet: self,
range,
}
}
}
impl AsSlice for Packet {
type Element = u8;
fn as_slice(&self) -> &[Self::Element] {
&self.deref()[..]
}
}
impl AsMutSlice for Packet {
fn as_mut_slice(&mut self) -> &mut [Self::Element] {
&mut self.deref_mut()[..]
}
}
impl Deref for Packet {
type Target = [u8; MTU];
fn deref(&self) -> &[u8; MTU] {
&self.0
}
}
impl DerefMut for Packet {
fn deref_mut(&mut self) -> &mut [u8; MTU] {
&mut self.0
}
}
pub struct PacketBuf {
packet: PacketBox,
range: Range<usize>,
}
impl AsSlice for PacketBuf {
type Element = u8;
fn as_slice(&self) -> &[Self::Element] {
&self.packet[self.range.clone()]
}
}
impl AsMutSlice for PacketBuf {
fn as_mut_slice(&mut self) -> &mut [Self::Element] {
&mut self.packet[self.range.clone()]
}
}
impl Deref for PacketBuf {
type Target = [u8];
fn deref(&self) -> &[u8] {
&self.packet[self.range.clone()]
}
}
impl DerefMut for PacketBuf {
fn deref_mut(&mut self) -> &mut [u8] {
&mut self.packet[self.range.clone()]
}
}

245
embassy-net/src/pool.rs Normal file
View File

@ -0,0 +1,245 @@
#![macro_use]
use as_slice::{AsMutSlice, AsSlice};
use core::cmp;
use core::fmt;
use core::hash::{Hash, Hasher};
use core::mem::MaybeUninit;
use core::ops::{Deref, DerefMut};
use core::sync::atomic::{AtomicU32, Ordering};
use crate::fmt::{assert, *};
struct AtomicBitset<const N: usize>
where
[AtomicU32; (N + 31) / 32]: Sized,
{
used: [AtomicU32; (N + 31) / 32],
}
impl<const N: usize> AtomicBitset<N>
where
[AtomicU32; (N + 31) / 32]: Sized,
{
const fn new() -> Self {
const Z: AtomicU32 = AtomicU32::new(0);
Self {
used: [Z; (N + 31) / 32],
}
}
fn alloc(&self) -> Option<usize> {
for (i, val) in self.used.iter().enumerate() {
let res = val.fetch_update(Ordering::AcqRel, Ordering::Acquire, |val| {
let n = val.trailing_ones() as usize + i * 32;
if n >= N {
None
} else {
Some(val | (1 << n))
}
});
if let Ok(val) = res {
let n = val.trailing_ones() as usize + i * 32;
return Some(n);
}
}
None
}
fn free(&self, i: usize) {
assert!(i < N);
self.used[i / 32].fetch_and(!(1 << ((i % 32) as u32)), Ordering::AcqRel);
}
}
pub trait Pool<T> {
fn alloc(&self) -> Option<*mut T>;
unsafe fn free(&self, p: *mut T);
}
pub struct BitPool<T, const N: usize>
where
[AtomicU32; (N + 31) / 32]: Sized,
{
used: AtomicBitset<N>,
data: MaybeUninit<[T; N]>,
}
impl<T, const N: usize> BitPool<T, N>
where
[AtomicU32; (N + 31) / 32]: Sized,
{
pub const fn new() -> Self {
Self {
used: AtomicBitset::new(),
data: MaybeUninit::uninit(),
}
}
}
impl<T, const N: usize> Pool<T> for BitPool<T, N>
where
[AtomicU32; (N + 31) / 32]: Sized,
{
fn alloc(&self) -> Option<*mut T> {
let n = self.used.alloc()?;
let origin = self.data.as_ptr() as *mut T;
Some(unsafe { origin.add(n) })
}
/// safety: p must be a pointer obtained from self.alloc that hasn't been freed yet.
unsafe fn free(&self, p: *mut T) {
let origin = self.data.as_ptr() as *mut T;
let n = p.offset_from(origin);
assert!(n >= 0);
assert!((n as usize) < N);
self.used.free(n as usize);
}
}
pub trait StaticPool: 'static {
type Item: 'static;
type Pool: Pool<Self::Item>;
fn get() -> &'static Self::Pool;
}
pub struct Box<P: StaticPool> {
ptr: *mut P::Item,
}
impl<P: StaticPool> Box<P> {
pub fn new(item: P::Item) -> Option<Self> {
let p = match P::get().alloc() {
Some(p) => p,
None => {
warn!("alloc failed!");
return None;
}
};
//trace!("allocated {:u32}", p as u32);
unsafe { p.write(item) };
Some(Self { ptr: p })
}
}
impl<P: StaticPool> Drop for Box<P> {
fn drop(&mut self) {
unsafe {
//trace!("dropping {:u32}", self.ptr as u32);
self.ptr.drop_in_place();
P::get().free(self.ptr);
};
}
}
unsafe impl<P: StaticPool> Send for Box<P> where P::Item: Send {}
unsafe impl<P: StaticPool> Sync for Box<P> where P::Item: Sync {}
unsafe impl<P: StaticPool> stable_deref_trait::StableDeref for Box<P> {}
impl<P: StaticPool> AsSlice for Box<P>
where
P::Item: AsSlice,
{
type Element = <P::Item as AsSlice>::Element;
fn as_slice(&self) -> &[Self::Element] {
self.deref().as_slice()
}
}
impl<P: StaticPool> AsMutSlice for Box<P>
where
P::Item: AsMutSlice,
{
fn as_mut_slice(&mut self) -> &mut [Self::Element] {
self.deref_mut().as_mut_slice()
}
}
impl<P: StaticPool> Deref for Box<P> {
type Target = P::Item;
fn deref(&self) -> &P::Item {
unsafe { &*self.ptr }
}
}
impl<P: StaticPool> DerefMut for Box<P> {
fn deref_mut(&mut self) -> &mut P::Item {
unsafe { &mut *self.ptr }
}
}
impl<P: StaticPool> fmt::Debug for Box<P>
where
P::Item: fmt::Debug,
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
<P::Item as fmt::Debug>::fmt(self, f)
}
}
impl<P: StaticPool> fmt::Display for Box<P>
where
P::Item: fmt::Display,
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
<P::Item as fmt::Display>::fmt(self, f)
}
}
impl<P: StaticPool> PartialEq for Box<P>
where
P::Item: PartialEq,
{
fn eq(&self, rhs: &Box<P>) -> bool {
<P::Item as PartialEq>::eq(self, rhs)
}
}
impl<P: StaticPool> Eq for Box<P> where P::Item: Eq {}
impl<P: StaticPool> PartialOrd for Box<P>
where
P::Item: PartialOrd,
{
fn partial_cmp(&self, rhs: &Box<P>) -> Option<cmp::Ordering> {
<P::Item as PartialOrd>::partial_cmp(self, rhs)
}
}
impl<P: StaticPool> Ord for Box<P>
where
P::Item: Ord,
{
fn cmp(&self, rhs: &Box<P>) -> cmp::Ordering {
<P::Item as Ord>::cmp(self, rhs)
}
}
impl<P: StaticPool> Hash for Box<P>
where
P::Item: Hash,
{
fn hash<H>(&self, state: &mut H)
where
H: Hasher,
{
<P::Item as Hash>::hash(self, state)
}
}
macro_rules! pool {
($vis:vis $name:ident: [$ty:ty; $size:expr]) => {
$vis struct $name;
impl StaticPool for $name {
type Item = $ty;
type Pool = BitPool<$ty, $size>;
fn get() -> &'static Self::Pool {
static POOL: BitPool<$ty, $size> = BitPool::new();
&POOL
}
}
};
}

212
embassy-net/src/stack.rs Normal file
View File

@ -0,0 +1,212 @@
use core::future::Future;
use core::task::Context;
use core::task::Poll;
use core::{cell::RefCell, future};
use embassy::time::{Instant, Timer};
use embassy::util::ThreadModeMutex;
use embassy::util::{Forever, WakerRegistration};
use futures::pin_mut;
use smoltcp::iface::{InterfaceBuilder, Neighbor, NeighborCache, Route, Routes};
use smoltcp::phy::Device as _;
use smoltcp::phy::Medium;
use smoltcp::socket::SocketSetItem;
use smoltcp::time::Instant as SmolInstant;
use smoltcp::wire::{EthernetAddress, IpAddress, IpCidr, Ipv4Address};
use crate::device::{Device, DeviceAdapter};
use crate::fmt::*;
use crate::{
config::{Config, Configurator},
device::LinkState,
};
use crate::{Interface, SocketSet};
const ADDRESSES_LEN: usize = 1;
const NEIGHBOR_CACHE_LEN: usize = 8;
const SOCKETS_LEN: usize = 2;
const LOCAL_PORT_MIN: u16 = 1025;
const LOCAL_PORT_MAX: u16 = 65535;
struct StackResources {
addresses: [IpCidr; ADDRESSES_LEN],
neighbor_cache: [Option<(IpAddress, Neighbor)>; NEIGHBOR_CACHE_LEN],
sockets: [Option<SocketSetItem<'static>>; SOCKETS_LEN],
routes: [Option<(IpCidr, Route)>; 1],
}
static STACK_RESOURCES: Forever<StackResources> = Forever::new();
static STACK: ThreadModeMutex<RefCell<Option<Stack>>> = ThreadModeMutex::new(RefCell::new(None));
pub(crate) struct Stack {
iface: Interface,
pub sockets: SocketSet,
link_up: bool,
next_local_port: u16,
configurator: &'static mut dyn Configurator,
waker: WakerRegistration,
}
impl Stack {
pub(crate) fn with<R>(f: impl FnOnce(&mut Stack) -> R) -> R {
let mut stack = STACK.borrow().borrow_mut();
let stack = stack.as_mut().unwrap();
f(stack)
}
pub fn get_local_port(&mut self) -> u16 {
let res = self.next_local_port;
self.next_local_port = if res >= LOCAL_PORT_MAX {
LOCAL_PORT_MIN
} else {
res + 1
};
res
}
pub(crate) fn wake(&mut self) {
self.waker.wake()
}
fn poll_configurator(&mut self, timestamp: SmolInstant) {
if let Some(config) = self
.configurator
.poll(&mut self.iface, &mut self.sockets, timestamp)
{
let medium = self.iface.device().capabilities().medium;
let (addr, gateway) = match config {
Config::Up(config) => (config.address.into(), Some(config.gateway)),
Config::Down => (IpCidr::new(Ipv4Address::UNSPECIFIED.into(), 32), None),
};
self.iface.update_ip_addrs(|addrs| {
let curr_addr = &mut addrs[0];
if *curr_addr != addr {
info!("IPv4 address: {:?} -> {:?}", *curr_addr, addr);
*curr_addr = addr;
}
});
if medium == Medium::Ethernet {
self.iface.routes_mut().update(|r| {
let cidr = IpCidr::new(IpAddress::v4(0, 0, 0, 0), 0);
let curr_gateway = r.get(&cidr).map(|r| r.via_router);
if curr_gateway != gateway.map(|a| a.into()) {
info!("IPv4 gateway: {:?} -> {:?}", curr_gateway, gateway);
if let Some(gateway) = gateway {
r.insert(cidr, Route::new_ipv4_gateway(gateway)).unwrap();
} else {
r.remove(&cidr);
}
}
});
}
}
}
fn poll(&mut self, cx: &mut Context<'_>) {
self.iface.device_mut().device.register_waker(cx.waker());
self.waker.register(cx.waker());
let timestamp = instant_to_smoltcp(Instant::now());
if let Err(e) = self.iface.poll(&mut self.sockets, timestamp) {
// If poll() returns error, it may not be done yet, so poll again later.
cx.waker().wake_by_ref();
return;
}
// Update link up
let old_link_up = self.link_up;
self.link_up = self.iface.device_mut().device.link_state() == LinkState::Up;
// Print when changed
if old_link_up != self.link_up {
if self.link_up {
info!("Link up!");
} else {
info!("Link down!");
}
}
if old_link_up || self.link_up {
self.poll_configurator(timestamp)
}
if let Some(poll_at) = self.iface.poll_at(&mut self.sockets, timestamp) {
let t = Timer::at(instant_from_smoltcp(poll_at));
pin_mut!(t);
if t.poll(cx).is_ready() {
cx.waker().wake_by_ref();
}
}
}
}
/// Initialize embassy_net.
/// This function must be called from thread mode.
pub fn init(device: &'static mut dyn Device, configurator: &'static mut dyn Configurator) {
let res = STACK_RESOURCES.put(StackResources {
addresses: [IpCidr::new(Ipv4Address::UNSPECIFIED.into(), 32)],
neighbor_cache: [None; NEIGHBOR_CACHE_LEN],
sockets: [None; SOCKETS_LEN],
routes: [None; 1],
});
let ethernet_addr = EthernetAddress([0x02, 0x02, 0x02, 0x02, 0x02, 0x02]);
let medium = device.capabilities().medium;
let mut b = InterfaceBuilder::new(DeviceAdapter::new(device));
b = b.ip_addrs(&mut res.addresses[..]);
if medium == Medium::Ethernet {
b = b.ethernet_addr(ethernet_addr);
b = b.neighbor_cache(NeighborCache::new(&mut res.neighbor_cache[..]));
b = b.routes(Routes::new(&mut res.routes[..]));
}
let iface = b.finalize();
let sockets = SocketSet::new(&mut res.sockets[..]);
let local_port = loop {
let mut res = [0u8; 2];
embassy::rand::rand(&mut res);
let port = u16::from_le_bytes(res);
if port >= LOCAL_PORT_MIN && port <= LOCAL_PORT_MAX {
break port;
}
};
let stack = Stack {
iface,
sockets,
link_up: false,
configurator,
next_local_port: local_port,
waker: WakerRegistration::new(),
};
*STACK.borrow().borrow_mut() = Some(stack);
}
pub fn is_init() -> bool {
STACK.borrow().borrow().is_some()
}
pub async fn run() {
futures::future::poll_fn(|cx| {
Stack::with(|stack| stack.poll(cx));
Poll::<()>::Pending
})
.await
}
fn instant_to_smoltcp(instant: Instant) -> SmolInstant {
SmolInstant::from_millis(instant.as_millis() as i64)
}
fn instant_from_smoltcp(instant: SmolInstant) -> Instant {
Instant::from_millis(instant.total_millis() as u64)
}

178
embassy-net/src/tcp_socket.rs Normal file
View File

@ -0,0 +1,178 @@
use core::marker::PhantomData;
use core::mem;
use core::pin::Pin;
use core::task::{Context, Poll};
use embassy::io;
use embassy::io::{AsyncBufRead, AsyncWrite};
use smoltcp::socket::SocketHandle;
use smoltcp::socket::TcpSocket as SyncTcpSocket;
use smoltcp::socket::{TcpSocketBuffer, TcpState};
use smoltcp::time::Duration;
use smoltcp::wire::IpEndpoint;
use smoltcp::{Error, Result};
use super::stack::Stack;
use crate::fmt::*;
pub struct TcpSocket<'a> {
handle: SocketHandle,
ghost: PhantomData<&'a mut [u8]>,
}
impl<'a> Unpin for TcpSocket<'a> {}
impl<'a> TcpSocket<'a> {
pub fn new(rx_buffer: &'a mut [u8], tx_buffer: &'a mut [u8]) -> Self {
let handle = Stack::with(|stack| {
let rx_buffer: &'static mut [u8] = unsafe { mem::transmute(rx_buffer) };
let tx_buffer: &'static mut [u8] = unsafe { mem::transmute(tx_buffer) };
stack.sockets.add(SyncTcpSocket::new(
TcpSocketBuffer::new(rx_buffer),
TcpSocketBuffer::new(tx_buffer),
))
});
Self {
handle,
ghost: PhantomData,
}
}
pub async fn connect<T>(&mut self, remote_endpoint: T) -> Result<()>
where
T: Into<IpEndpoint>,
{
let local_port = Stack::with(|stack| stack.get_local_port());
self.with(|s| s.connect(remote_endpoint, local_port))?;
futures::future::poll_fn(|cx| {
self.with(|s| match s.state() {
TcpState::Closed | TcpState::TimeWait => Poll::Ready(Err(Error::Unaddressable)),
TcpState::Listen => Poll::Ready(Err(Error::Illegal)),
TcpState::SynSent | TcpState::SynReceived => {
s.register_send_waker(cx.waker());
Poll::Pending
}
_ => Poll::Ready(Ok(())),
})
})
.await
}
pub fn set_timeout(&mut self, duration: Option<Duration>) {
self.with(|s| s.set_timeout(duration))
}
pub fn set_keep_alive(&mut self, interval: Option<Duration>) {
self.with(|s| s.set_keep_alive(interval))
}
pub fn set_hop_limit(&mut self, hop_limit: Option<u8>) {
self.with(|s| s.set_hop_limit(hop_limit))
}
pub fn local_endpoint(&self) -> IpEndpoint {
self.with(|s| s.local_endpoint())
}
pub fn remote_endpoint(&self) -> IpEndpoint {
self.with(|s| s.remote_endpoint())
}
pub fn state(&self) -> TcpState {
self.with(|s| s.state())
}
pub fn close(&mut self) {
self.with(|s| s.close())
}
pub fn abort(&mut self) {
self.with(|s| s.abort())
}
pub fn may_send(&self) -> bool {
self.with(|s| s.may_send())
}
pub fn may_recv(&self) -> bool {
self.with(|s| s.may_recv())
}
fn with<R>(&self, f: impl FnOnce(&mut SyncTcpSocket) -> R) -> R {
Stack::with(|stack| {
let res = {
let mut s = stack.sockets.get::<SyncTcpSocket>(self.handle);
f(&mut *s)
};
stack.wake();
res
})
}
}
fn to_ioerr(e: Error) -> io::Error {
warn!("smoltcp err: {:?}", e);
// todo
io::Error::Other
}
impl<'a> Drop for TcpSocket<'a> {
fn drop(&mut self) {
Stack::with(|stack| {
stack.sockets.remove(self.handle);
})
}
}
impl<'a> AsyncBufRead for TcpSocket<'a> {
fn poll_fill_buf<'z>(
self: Pin<&'z mut Self>,
cx: &mut Context<'_>,
) -> Poll<io::Result<&'z [u8]>> {
self.with(|socket| match socket.peek(1 << 30) {
// No data ready
Ok(buf) if buf.len() == 0 => {
socket.register_recv_waker(cx.waker());
Poll::Pending
}
// Data ready!
Ok(buf) => {
// Safety:
// - User can't touch the inner TcpSocket directly at all.
// - The socket itself won't touch these bytes until consume() is called, which
// requires the user to release this borrow.
let buf: &'z [u8] = unsafe { core::mem::transmute(&*buf) };
Poll::Ready(Ok(buf))
}
// EOF
Err(Error::Finished) => Poll::Ready(Ok(&[][..])),
// Error
Err(e) => Poll::Ready(Err(to_ioerr(e))),
})
}
fn consume(self: Pin<&mut Self>, amt: usize) {
self.with(|s| s.recv(|_| (amt, ()))).unwrap()
}
}
impl<'a> AsyncWrite for TcpSocket<'a> {
fn poll_write(
self: Pin<&mut Self>,
cx: &mut Context<'_>,
buf: &[u8],
) -> Poll<io::Result<usize>> {
self.with(|s| match s.send_slice(buf) {
// Not ready to send (no space in the tx buffer)
Ok(0) => {
s.register_send_waker(cx.waker());
Poll::Pending
}
// Some data sent
Ok(n) => Poll::Ready(Ok(n)),
// Error
Err(e) => Poll::Ready(Err(to_ioerr(e))),
})
}
}

25
test-build.sh Executable file
View File

@ -0,0 +1,25 @@
#!/bin/bash
set -euxo pipefail
# embassy std
(cd embassy; cargo build --features log,std)
# embassy embedded
(cd embassy; cargo build --target thumbv7em-none-eabi)
(cd embassy; cargo build --target thumbv7em-none-eabi --features log)
(cd embassy; cargo build --target thumbv7em-none-eabi --features defmt)
# embassy-nrf
(cd embassy-nrf-examples; cargo build --target thumbv7em-none-eabi --bins)
(cd embassy-nrf; cargo build --target thumbv7em-none-eabi --features 52810)
#(cd embassy-nrf; cargo build --target thumbv7em-none-eabi --features 52811) # nrf52811-hal doesn't exist yet
(cd embassy-nrf; cargo build --target thumbv7em-none-eabi --features 52832)
(cd embassy-nrf; cargo build --target thumbv7em-none-eabi --features 52833)
(cd embassy-nrf; cargo build --target thumbv7em-none-eabi --features 52840)
(cd embassy-nrf; cargo build --target thumbv7em-none-eabi --features 52840,log)
(cd embassy-nrf; cargo build --target thumbv7em-none-eabi --features 52840,defmt)