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net: allow changing IP config at runtime.

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This commit is contained in:
Dario Nieuwenhuis
2023-08-25 19:48:45 +02:00
parent 2a6b743b9e
commit cc8961034e
2 changed files with 162 additions and 186 deletions
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346
embassy-net/src/lib.rs
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@@ -3,6 +3,9 @@
#![warn(missing_docs)]
#![doc = include_str!("../README.md")]
#[cfg(not(any(feature = "proto-ipv4", feature = "proto-ipv6")))]
compile_error!("You must enable at least one of the following features: proto-ipv4, proto-ipv6");
// This mod MUST go first, so that the others see its macros.
pub(crate) mod fmt;
@@ -20,7 +23,7 @@ use core::future::{poll_fn, Future};
use core::task::{Context, Poll};
pub use embassy_net_driver as driver;
use embassy_net_driver::{Driver, LinkState, Medium};
use embassy_net_driver::{Driver, LinkState};
use embassy_sync::waitqueue::WakerRegistration;
use embassy_time::{Instant, Timer};
use futures::pin_mut;
@@ -133,6 +136,8 @@ impl Default for DhcpConfig {
}
/// Network stack configuration.
#[derive(Debug, Clone, Default)]
#[non_exhaustive]
pub struct Config {
/// IPv4 configuration
#[cfg(feature = "proto-ipv4")]
@@ -181,23 +186,27 @@ impl Config {
/// Network stack IPv4 configuration.
#[cfg(feature = "proto-ipv4")]
#[derive(Debug, Clone, Default)]
pub enum ConfigV4 {
/// Do not configure IPv4.
#[default]
None,
/// Use a static IPv4 address configuration.
Static(StaticConfigV4),
/// Use DHCP to obtain an IP address configuration.
#[cfg(feature = "dhcpv4")]
Dhcp(DhcpConfig),
/// Do not configure IPv6.
None,
}
/// Network stack IPv6 configuration.
#[cfg(feature = "proto-ipv6")]
#[derive(Debug, Clone, Default)]
pub enum ConfigV6 {
/// Do not configure IPv6.
#[default]
None,
/// Use a static IPv6 address configuration.
Static(StaticConfigV6),
/// Do not configure IPv6.
None,
}
/// A network stack.
@@ -276,7 +285,6 @@ impl<D: Driver + 'static> Stack<D> {
next_local_port,
};
#[cfg_attr(feature = "medium-ieee802154", allow(unused_mut))]
let mut inner = Inner {
device,
link_up: false,
@@ -295,30 +303,11 @@ impl<D: Driver + 'static> Stack<D> {
dns_waker: WakerRegistration::new(),
};
#[cfg(feature = "medium-ieee802154")]
let _ = config;
#[cfg(feature = "proto-ipv4")]
match config.ipv4 {
ConfigV4::Static(config) => {
inner.apply_config_v4(&mut socket, config);
}
#[cfg(feature = "dhcpv4")]
ConfigV4::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);
}
ConfigV4::None => {}
}
inner.set_config_v4(&mut socket, config.ipv4);
#[cfg(feature = "proto-ipv6")]
match config.ipv6 {
ConfigV6::Static(config) => {
inner.apply_config_v6(&mut socket, config);
}
ConfigV6::None => {}
}
inner.set_config_v6(&mut socket, config.ipv6);
inner.apply_static_config(&mut socket);
Self {
socket: RefCell::new(socket),
@@ -372,15 +361,36 @@ impl<D: Driver + 'static> Stack<D> {
}
/// Get the current IPv4 configuration.
///
/// If using DHCP, this will be None if DHCP hasn't been able to
/// acquire an IP address, or Some if it has.
#[cfg(feature = "proto-ipv4")]
pub fn config_v4(&self) -> Option<StaticConfigV4> {
self.with(|_s, i| i.static_v4.clone())
self.with(|_, i| i.static_v4.clone())
}
/// Get the current IPv6 configuration.
#[cfg(feature = "proto-ipv6")]
pub fn config_v6(&self) -> Option<StaticConfigV6> {
self.with(|_s, i| i.static_v6.clone())
self.with(|_, i| i.static_v6.clone())
}
/// Set the IPv4 configuration.
#[cfg(feature = "proto-ipv4")]
pub fn set_config_v4(&self, config: ConfigV4) {
self.with_mut(|s, i| {
i.set_config_v4(s, config);
i.apply_static_config(s);
})
}
/// Set the IPv6 configuration.
#[cfg(feature = "proto-ipv6")]
pub fn set_config_v6(&self, config: ConfigV6) {
self.with_mut(|s, i| {
i.set_config_v6(s, config);
i.apply_static_config(s);
})
}
/// Run the network stack.
@@ -582,166 +592,125 @@ impl SocketStack {
impl<D: Driver + 'static> Inner<D> {
#[cfg(feature = "proto-ipv4")]
fn apply_config_v4(&mut self, s: &mut SocketStack, config: StaticConfigV4) {
debug!("Acquired IP configuration:");
debug!(" IP address: {}", config.address);
s.iface.update_ip_addrs(|addrs| {
if let Some((index, _)) = addrs
.iter()
.enumerate()
.find(|(_, &addr)| matches!(addr, IpCidr::Ipv4(_)))
{
addrs.remove(index);
}
addrs.push(IpCidr::Ipv4(config.address)).unwrap();
});
#[cfg(feature = "medium-ip")]
let skip_gateway = self.device.capabilities().medium != Medium::Ip;
#[cfg(not(feature = "medium-ip"))]
let skip_gateway = false;
if !skip_gateway {
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);
}
self.static_v4 = Some(config);
#[cfg(feature = "dns")]
{
self.update_dns_servers(s)
}
}
/// Replaces the current IPv6 static configuration with a newly supplied config.
#[cfg(feature = "proto-ipv6")]
fn apply_config_v6(&mut self, s: &mut SocketStack, config: StaticConfigV6) {
#[cfg(feature = "medium-ethernet")]
let medium = self.device.capabilities().medium;
debug!("Acquired IPv6 configuration:");
debug!(" IP address: {}", config.address);
s.iface.update_ip_addrs(|addrs| {
if let Some((index, _)) = addrs
.iter()
.enumerate()
.find(|(_, &addr)| matches!(addr, IpCidr::Ipv6(_)))
{
addrs.remove(index);
}
addrs.push(IpCidr::Ipv6(config.address)).unwrap();
});
#[cfg(feature = "medium-ethernet")]
if Medium::Ethernet == medium {
if let Some(gateway) = config.gateway {
debug!(" Default gateway: {}", gateway);
s.iface.routes_mut().add_default_ipv6_route(gateway).unwrap();
} else {
debug!(" Default gateway: None");
s.iface.routes_mut().remove_default_ipv6_route();
}
}
for (i, s) in config.dns_servers.iter().enumerate() {
debug!(" DNS server {}: {}", i, s);
}
self.static_v6 = Some(config);
#[cfg(feature = "dns")]
{
self.update_dns_servers(s)
}
}
#[cfg(feature = "dns")]
fn update_dns_servers(&mut self, s: &mut SocketStack) {
let socket = s.sockets.get_mut::<smoltcp::socket::dns::Socket>(self.dns_socket);
let servers_v4;
#[cfg(feature = "proto-ipv4")]
{
servers_v4 = self
.static_v4
.iter()
.flat_map(|cfg| cfg.dns_servers.iter().map(|c| IpAddress::Ipv4(*c)));
pub fn set_config_v4(&mut self, _s: &mut SocketStack, config: ConfigV4) {
// Handle static config.
self.static_v4 = match config.clone() {
ConfigV4::None => None,
#[cfg(feature = "dhcpv4")]
ConfigV4::Dhcp(_) => None,
ConfigV4::Static(c) => Some(c),
};
#[cfg(not(feature = "proto-ipv4"))]
{
servers_v4 = core::iter::empty();
}
let servers_v6;
#[cfg(feature = "proto-ipv6")]
{
servers_v6 = self
.static_v6
.iter()
.flat_map(|cfg| cfg.dns_servers.iter().map(|c| IpAddress::Ipv6(*c)));
}
#[cfg(not(feature = "proto-ipv6"))]
{
servers_v6 = core::iter::empty();
}
// Handle DHCP config.
#[cfg(feature = "dhcpv4")]
match config {
ConfigV4::Dhcp(c) => {
// Create the socket if it doesn't exist.
if self.dhcp_socket.is_none() {
let socket = smoltcp::socket::dhcpv4::Socket::new();
let handle = _s.sockets.add(socket);
self.dhcp_socket = Some(handle);
}
// Prefer the v6 DNS servers over the v4 servers
let servers: Vec<IpAddress, 6> = servers_v6.chain(servers_v4).collect();
socket.update_servers(&servers[..]);
}
#[cfg(feature = "dhcpv4")]
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.map(crate::time::duration_to_smoltcp));
socket.set_ports(config.server_port, config.client_port);
socket.set_retry_config(config.retry_config);
}
#[cfg(feature = "dhcpv4")]
fn unapply_config_v4(&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| {
#[cfg(feature = "proto-ipv4")]
if let Some((index, _)) = ip_addrs
.iter()
.enumerate()
.find(|(_, &addr)| matches!(addr, IpCidr::Ipv4(_)))
{
ip_addrs.remove(index);
// Configure it
let socket = _s.sockets.get_mut::<dhcpv4::Socket>(self.dhcp_socket.unwrap());
socket.set_ignore_naks(c.ignore_naks);
socket.set_max_lease_duration(c.max_lease_duration.map(crate::time::duration_to_smoltcp));
socket.set_ports(c.server_port, c.client_port);
socket.set_retry_config(c.retry_config);
socket.reset();
}
});
#[cfg(feature = "medium-ethernet")]
if medium == Medium::Ethernet {
#[cfg(feature = "proto-ipv4")]
{
s.iface.routes_mut().remove_default_ipv4_route();
_ => {
// Remove DHCP socket if any.
if let Some(socket) = self.dhcp_socket {
_s.sockets.remove(socket);
self.dhcp_socket = None;
}
}
}
}
#[cfg(feature = "proto-ipv6")]
pub fn set_config_v6(&mut self, _s: &mut SocketStack, config: ConfigV6) {
self.static_v6 = match config {
ConfigV6::None => None,
ConfigV6::Static(c) => Some(c),
};
}
fn apply_static_config(&mut self, s: &mut SocketStack) {
let mut addrs = Vec::new();
#[cfg(feature = "dns")]
let mut dns_servers: Vec<_, 6> = Vec::new();
#[cfg(feature = "proto-ipv4")]
{
self.static_v4 = None
let mut gateway_v4 = None;
#[cfg(feature = "proto-ipv6")]
let mut gateway_v6 = None;
#[cfg(feature = "proto-ipv4")]
if let Some(config) = &self.static_v4 {
debug!("IPv4: UP");
debug!(" IP address: {:?}", config.address);
debug!(" Default gateway: {:?}", config.gateway);
addrs.push(IpCidr::Ipv4(config.address)).unwrap();
gateway_v4 = config.gateway.into();
#[cfg(feature = "dns")]
for s in &config.dns_servers {
debug!(" DNS server: {:?}", s);
dns_servers.push(s.clone().into()).unwrap();
}
} else {
info!("IPv4: DOWN");
}
#[cfg(feature = "proto-ipv6")]
if let Some(config) = &self.static_v6 {
debug!("IPv6: UP");
debug!(" IP address: {:?}", config.address);
debug!(" Default gateway: {:?}", config.gateway);
addrs.push(IpCidr::Ipv6(config.address)).unwrap();
gateway_v6 = config.gateway.into();
#[cfg(feature = "dns")]
for s in &config.dns_servers {
debug!(" DNS server: {:?}", s);
dns_servers.push(s.clone().into()).unwrap();
}
} else {
info!("IPv6: DOWN");
}
// Apply addresses
s.iface.update_ip_addrs(|a| *a = addrs);
// Apply gateways
#[cfg(feature = "proto-ipv4")]
if let Some(gateway) = gateway_v4 {
s.iface.routes_mut().add_default_ipv4_route(gateway).unwrap();
} else {
s.iface.routes_mut().remove_default_ipv4_route();
}
#[cfg(feature = "proto-ipv6")]
if let Some(gateway) = gateway_v6 {
s.iface.routes_mut().add_default_ipv6_route(gateway).unwrap();
} else {
s.iface.routes_mut().remove_default_ipv6_route();
}
// Apply DNS servers
#[cfg(feature = "dns")]
s.sockets
.get_mut::<smoltcp::socket::dns::Socket>(self.dns_socket)
.update_servers(&dns_servers[..]);
}
fn poll(&mut self, cx: &mut Context<'_>, s: &mut SocketStack) {
s.waker.register(cx.waker());
#[cfg(any(feature = "medium-ethernet", feature = "medium-ieee802154"))]
if self.device.capabilities().medium == Medium::Ethernet
|| self.device.capabilities().medium == Medium::Ieee802154
if self.device.capabilities().medium == embassy_net_driver::Medium::Ethernet
|| self.device.capabilities().medium == embassy_net_driver::Medium::Ieee802154
{
s.iface
.set_hardware_addr(to_smoltcp_hardware_address(self.device.hardware_address()));
@@ -763,6 +732,9 @@ impl<D: Driver + 'static> Inner<D> {
info!("link_up = {:?}", self.link_up);
}
#[allow(unused_mut)]
let mut apply_config = false;
#[cfg(feature = "dhcpv4")]
if let Some(dhcp_handle) = self.dhcp_socket {
let socket = s.sockets.get_mut::<dhcpv4::Socket>(dhcp_handle);
@@ -770,25 +742,29 @@ impl<D: Driver + 'static> Inner<D> {
if self.link_up {
match socket.poll() {
None => {}
Some(dhcpv4::Event::Deconfigured) => self.unapply_config_v4(s),
Some(dhcpv4::Event::Deconfigured) => {
self.static_v4 = None;
apply_config = true;
}
Some(dhcpv4::Event::Configured(config)) => {
let config = StaticConfigV4 {
self.static_v4 = Some(StaticConfigV4 {
address: config.address,
gateway: config.router,
dns_servers: config.dns_servers,
};
self.apply_config_v4(s, config)
});
apply_config = true;
}
}
} else if old_link_up {
socket.reset();
self.unapply_config_v4(s);
self.static_v4 = None;
apply_config = true;
}
}
//if old_link_up || self.link_up {
// self.poll_configurator(timestamp)
//}
//
if apply_config {
self.apply_static_config(s);
}
if let Some(poll_at) = s.iface.poll_at(timestamp, &mut s.sockets) {
let t = Timer::at(instant_from_smoltcp(poll_at));

2
examples/stm32wb/Cargo.toml
View File

@@ -11,7 +11,7 @@ embassy-stm32-wpan = { version = "0.1.0", path = "../../embassy-stm32-wpan", fea
embassy-sync = { version = "0.2.0", path = "../../embassy-sync", features = ["defmt"] }
embassy-executor = { version = "0.3.0", path = "../../embassy-executor", features = ["nightly", "arch-cortex-m", "executor-thread", "defmt", "integrated-timers"] }
embassy-time = { version = "0.1.2", path = "../../embassy-time", features = ["defmt", "defmt-timestamp-uptime", "tick-hz-32_768"] }
embassy-net = { version = "0.1.0", path = "../../embassy-net", features = ["defmt", "udp", "medium-ieee802154", "nightly"], optional=true }
embassy-net = { version = "0.1.0", path = "../../embassy-net", features = ["defmt", "udp", "proto-ipv6", "medium-ieee802154", "nightly"], optional=true }
defmt = "0.3"
defmt-rtt = "0.4"