-
Notifications
You must be signed in to change notification settings - Fork 728
/
lib.rs
477 lines (414 loc) · 14.8 KB
/
lib.rs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
#![cfg_attr(not(feature = "std"), no_std)]
#![cfg_attr(
feature = "nightly",
feature(type_alias_impl_trait, async_fn_in_trait, impl_trait_projections)
)]
#![cfg_attr(feature = "nightly", allow(incomplete_features))]
// This mod MUST go first, so that the others see its macros.
pub(crate) mod fmt;
pub use embassy_net_driver as driver;
mod device;
#[cfg(feature = "dns")]
pub mod dns;
#[cfg(feature = "tcp")]
pub mod tcp;
#[cfg(feature = "udp")]
pub mod udp;
use core::cell::RefCell;
use core::future::{poll_fn, Future};
use core::task::{Context, Poll};
use embassy_net_driver::{Driver, LinkState, Medium};
use embassy_sync::waitqueue::WakerRegistration;
use embassy_time::{Instant, Timer};
use futures::pin_mut;
use heapless::Vec;
#[cfg(feature = "dhcpv4")]
use smoltcp::iface::SocketHandle;
use smoltcp::iface::{Interface, SocketSet, SocketStorage};
#[cfg(feature = "dhcpv4")]
use smoltcp::socket::dhcpv4;
use smoltcp::socket::dhcpv4::RetryConfig;
use smoltcp::time::Duration;
// smoltcp reexports
pub use smoltcp::time::{Duration as SmolDuration, Instant as SmolInstant};
#[cfg(feature = "medium-ethernet")]
pub use smoltcp::wire::{EthernetAddress, HardwareAddress};
pub use smoltcp::wire::{IpAddress, IpCidr, Ipv4Address, Ipv4Cidr};
#[cfg(feature = "proto-ipv6")]
pub use smoltcp::wire::{Ipv6Address, Ipv6Cidr};
#[cfg(feature = "udp")]
pub use smoltcp::{socket::udp::PacketMetadata, wire::IpListenEndpoint};
use crate::device::DriverAdapter;
const LOCAL_PORT_MIN: u16 = 1025;
const LOCAL_PORT_MAX: u16 = 65535;
#[cfg(feature = "dns")]
const MAX_QUERIES: usize = 4;
pub struct StackResources<const SOCK: usize> {
sockets: [SocketStorage<'static>; SOCK],
#[cfg(feature = "dns")]
queries: [Option<dns::DnsQuery>; MAX_QUERIES],
}
impl<const SOCK: usize> StackResources<SOCK> {
pub fn new() -> Self {
#[cfg(feature = "dns")]
const INIT: Option<dns::DnsQuery> = None;
Self {
sockets: [SocketStorage::EMPTY; SOCK],
#[cfg(feature = "dns")]
queries: [INIT; MAX_QUERIES],
}
}
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct StaticConfig {
pub address: Ipv4Cidr,
pub gateway: Option<Ipv4Address>,
pub dns_servers: Vec<Ipv4Address, 3>,
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct DhcpConfig {
pub max_lease_duration: Option<Duration>,
pub retry_config: RetryConfig,
/// Ignore NAKs.
pub ignore_naks: bool,
/// Server port config
pub server_port: u16,
/// Client port config
pub client_port: u16,
}
impl Default for DhcpConfig {
fn default() -> Self {
Self {
max_lease_duration: Default::default(),
retry_config: Default::default(),
ignore_naks: Default::default(),
server_port: smoltcp::wire::DHCP_SERVER_PORT,
client_port: smoltcp::wire::DHCP_CLIENT_PORT,
}
}
}
pub enum Config {
Static(StaticConfig),
#[cfg(feature = "dhcpv4")]
Dhcp(DhcpConfig),
}
pub struct Stack<D: Driver> {
pub(crate) socket: RefCell<SocketStack>,
inner: RefCell<Inner<D>>,
}
struct Inner<D: Driver> {
device: D,
link_up: bool,
config: Option<StaticConfig>,
#[cfg(feature = "dhcpv4")]
dhcp_socket: Option<SocketHandle>,
#[cfg(feature = "dns")]
dns_socket: SocketHandle,
#[cfg(feature = "dns")]
dns_waker: WakerRegistration,
}
pub(crate) struct SocketStack {
pub(crate) sockets: SocketSet<'static>,
pub(crate) iface: Interface,
pub(crate) waker: WakerRegistration,
next_local_port: u16,
}
impl<D: Driver + 'static> Stack<D> {
pub fn new<const SOCK: usize>(
mut device: D,
config: Config,
resources: &'static mut StackResources<SOCK>,
random_seed: u64,
) -> Self {
#[cfg(feature = "medium-ethernet")]
let medium = device.capabilities().medium;
let mut iface_cfg = smoltcp::iface::Config::new();
iface_cfg.random_seed = random_seed;
#[cfg(feature = "medium-ethernet")]
if medium == Medium::Ethernet {
iface_cfg.hardware_addr = Some(HardwareAddress::Ethernet(EthernetAddress(device.ethernet_address())));
}
let iface = Interface::new(
iface_cfg,
&mut DriverAdapter {
inner: &mut device,
cx: None,
},
);
let sockets = SocketSet::new(&mut resources.sockets[..]);
let next_local_port = (random_seed % (LOCAL_PORT_MAX - LOCAL_PORT_MIN) as u64) as u16 + LOCAL_PORT_MIN;
let mut socket = SocketStack {
sockets,
iface,
waker: WakerRegistration::new(),
next_local_port,
};
let mut inner = Inner {
device,
link_up: false,
config: None,
#[cfg(feature = "dhcpv4")]
dhcp_socket: None,
#[cfg(feature = "dns")]
dns_socket: socket.sockets.add(dns::Socket::new(
&[],
managed::ManagedSlice::Borrowed(&mut resources.queries),
)),
#[cfg(feature = "dns")]
dns_waker: WakerRegistration::new(),
};
match config {
Config::Static(config) => {
inner.apply_config(&mut socket, config);
}
#[cfg(feature = "dhcpv4")]
Config::Dhcp(config) => {
let mut dhcp_socket = smoltcp::socket::dhcpv4::Socket::new();
inner.apply_dhcp_config(&mut dhcp_socket, config);
let handle = socket.sockets.add(dhcp_socket);
inner.dhcp_socket = Some(handle);
}
}
Self {
socket: RefCell::new(socket),
inner: RefCell::new(inner),
}
}
fn with<R>(&self, f: impl FnOnce(&SocketStack, &Inner<D>) -> R) -> R {
f(&*self.socket.borrow(), &*self.inner.borrow())
}
fn with_mut<R>(&self, f: impl FnOnce(&mut SocketStack, &mut Inner<D>) -> R) -> R {
f(&mut *self.socket.borrow_mut(), &mut *self.inner.borrow_mut())
}
pub fn ethernet_address(&self) -> [u8; 6] {
self.with(|_s, i| i.device.ethernet_address())
}
pub fn is_link_up(&self) -> bool {
self.with(|_s, i| i.link_up)
}
pub fn is_config_up(&self) -> bool {
self.with(|_s, i| i.config.is_some())
}
pub fn config(&self) -> Option<StaticConfig> {
self.with(|_s, i| i.config.clone())
}
pub async fn run(&self) -> ! {
poll_fn(|cx| {
self.with_mut(|s, i| i.poll(cx, s));
Poll::<()>::Pending
})
.await;
unreachable!()
}
/// Make a query for a given name and return the corresponding IP addresses.
#[cfg(feature = "dns")]
pub async fn dns_query(&self, name: &str, qtype: dns::DnsQueryType) -> Result<Vec<IpAddress, 1>, dns::Error> {
// For A and AAAA queries we try detect whether `name` is just an IP address
match qtype {
dns::DnsQueryType::A => {
if let Ok(ip) = name.parse().map(IpAddress::Ipv4) {
return Ok([ip].into_iter().collect());
}
}
#[cfg(feature = "proto-ipv6")]
dns::DnsQueryType::Aaaa => {
if let Ok(ip) = name.parse().map(IpAddress::Ipv6) {
return Ok([ip].into_iter().collect());
}
}
_ => {}
}
let query = poll_fn(|cx| {
self.with_mut(|s, i| {
let socket = s.sockets.get_mut::<dns::Socket>(i.dns_socket);
match socket.start_query(s.iface.context(), name, qtype) {
Ok(handle) => Poll::Ready(Ok(handle)),
Err(dns::StartQueryError::NoFreeSlot) => {
i.dns_waker.register(cx.waker());
Poll::Pending
}
Err(e) => Poll::Ready(Err(e)),
}
})
})
.await?;
use embassy_hal_common::drop::OnDrop;
let drop = OnDrop::new(|| {
self.with_mut(|s, i| {
let socket = s.sockets.get_mut::<dns::Socket>(i.dns_socket);
socket.cancel_query(query);
s.waker.wake();
i.dns_waker.wake();
})
});
let res = poll_fn(|cx| {
self.with_mut(|s, i| {
let socket = s.sockets.get_mut::<dns::Socket>(i.dns_socket);
match socket.get_query_result(query) {
Ok(addrs) => {
i.dns_waker.wake();
Poll::Ready(Ok(addrs))
}
Err(dns::GetQueryResultError::Pending) => {
socket.register_query_waker(query, cx.waker());
Poll::Pending
}
Err(e) => {
i.dns_waker.wake();
Poll::Ready(Err(e.into()))
}
}
})
})
.await;
drop.defuse();
res
}
}
#[cfg(feature = "igmp")]
impl<D: Driver + smoltcp::phy::Device + 'static> Stack<D> {
pub fn join_multicast_group<T>(&self, addr: T) -> Result<bool, smoltcp::iface::MulticastError>
where
T: Into<IpAddress>,
{
let addr = addr.into();
self.with_mut(|s, i| {
s.iface
.join_multicast_group(&mut i.device, addr, instant_to_smoltcp(Instant::now()))
})
}
pub fn leave_multicast_group<T>(&self, addr: T) -> Result<bool, smoltcp::iface::MulticastError>
where
T: Into<IpAddress>,
{
let addr = addr.into();
self.with_mut(|s, i| {
s.iface
.leave_multicast_group(&mut i.device, addr, instant_to_smoltcp(Instant::now()))
})
}
pub fn has_multicast_group<T: Into<IpAddress>>(&self, addr: T) -> bool {
self.socket.borrow().iface.has_multicast_group(addr)
}
}
impl SocketStack {
#[allow(clippy::absurd_extreme_comparisons, dead_code)]
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
}
}
impl<D: Driver + 'static> Inner<D> {
fn apply_config(&mut self, s: &mut SocketStack, config: StaticConfig) {
#[cfg(feature = "medium-ethernet")]
let medium = self.device.capabilities().medium;
debug!("Acquired IP configuration:");
debug!(" IP address: {}", config.address);
s.iface.update_ip_addrs(|addrs| {
if addrs.is_empty() {
addrs.push(IpCidr::Ipv4(config.address)).unwrap();
} else {
addrs[0] = IpCidr::Ipv4(config.address);
}
});
#[cfg(feature = "medium-ethernet")]
if medium == Medium::Ethernet {
if let Some(gateway) = config.gateway {
debug!(" Default gateway: {}", gateway);
s.iface.routes_mut().add_default_ipv4_route(gateway).unwrap();
} else {
debug!(" Default gateway: None");
s.iface.routes_mut().remove_default_ipv4_route();
}
}
for (i, s) in config.dns_servers.iter().enumerate() {
debug!(" DNS server {}: {}", i, s);
}
#[cfg(feature = "dns")]
{
let socket = s.sockets.get_mut::<smoltcp::socket::dns::Socket>(self.dns_socket);
let servers: Vec<IpAddress, 3> = config.dns_servers.iter().map(|c| IpAddress::Ipv4(*c)).collect();
socket.update_servers(&servers[..]);
}
self.config = Some(config)
}
fn apply_dhcp_config(&self, socket: &mut smoltcp::socket::dhcpv4::Socket, config: DhcpConfig) {
socket.set_ignore_naks(config.ignore_naks);
socket.set_max_lease_duration(config.max_lease_duration);
socket.set_ports(config.server_port, config.client_port);
socket.set_retry_config(config.retry_config);
}
#[allow(unused)] // used only with dhcp
fn unapply_config(&mut self, s: &mut SocketStack) {
#[cfg(feature = "medium-ethernet")]
let medium = self.device.capabilities().medium;
debug!("Lost IP configuration");
s.iface.update_ip_addrs(|ip_addrs| ip_addrs.clear());
#[cfg(feature = "medium-ethernet")]
if medium == Medium::Ethernet {
s.iface.routes_mut().remove_default_ipv4_route();
}
self.config = None
}
fn poll(&mut self, cx: &mut Context<'_>, s: &mut SocketStack) {
s.waker.register(cx.waker());
#[cfg(feature = "medium-ethernet")]
if self.device.capabilities().medium == Medium::Ethernet {
s.iface.set_hardware_addr(HardwareAddress::Ethernet(EthernetAddress(
self.device.ethernet_address(),
)));
}
let timestamp = instant_to_smoltcp(Instant::now());
let mut smoldev = DriverAdapter {
cx: Some(cx),
inner: &mut self.device,
};
s.iface.poll(timestamp, &mut smoldev, &mut s.sockets);
// Update link up
let old_link_up = self.link_up;
self.link_up = self.device.link_state(cx) == LinkState::Up;
// Print when changed
if old_link_up != self.link_up {
info!("link_up = {:?}", self.link_up);
}
#[cfg(feature = "dhcpv4")]
if let Some(dhcp_handle) = self.dhcp_socket {
let socket = s.sockets.get_mut::<dhcpv4::Socket>(dhcp_handle);
if self.link_up {
match socket.poll() {
None => {}
Some(dhcpv4::Event::Deconfigured) => self.unapply_config(s),
Some(dhcpv4::Event::Configured(config)) => {
let config = StaticConfig {
address: config.address,
gateway: config.router,
dns_servers: config.dns_servers,
};
self.apply_config(s, config)
}
}
} else if old_link_up {
socket.reset();
self.unapply_config(s);
}
}
//if old_link_up || self.link_up {
// self.poll_configurator(timestamp)
//}
//
if let Some(poll_at) = s.iface.poll_at(timestamp, &mut s.sockets) {
let t = Timer::at(instant_from_smoltcp(poll_at));
pin_mut!(t);
if t.poll(cx).is_ready() {
cx.waker().wake_by_ref();
}
}
}
}
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)
}