commit
360dbc79d4
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@ -73,9 +73,9 @@ jobs:
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include:
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# defmt doesn't support 1.40
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- rust: stable
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features: defmt medium-ip medium-ethernet proto-ipv6 proto-ipv6 proto-igmp proto-dhcpv4 socket-raw socket-udp socket-tcp socket-icmp async
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features: defmt defmt-trace medium-ip medium-ethernet proto-ipv6 proto-ipv6 proto-igmp proto-dhcpv4 socket-raw socket-udp socket-tcp socket-icmp async
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- rust: nightly
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features: defmt medium-ip medium-ethernet proto-ipv6 proto-ipv6 proto-igmp proto-dhcpv4 socket-raw socket-udp socket-tcp socket-icmp async
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features: defmt defmt-trace medium-ip medium-ethernet proto-ipv6 proto-ipv6 proto-igmp proto-dhcpv4 socket-raw socket-udp socket-tcp socket-icmp async
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steps:
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- uses: actions/checkout@v2
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@ -39,13 +39,14 @@ verbose = []
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"phy-tuntap_interface" = ["std", "libc", "medium-ethernet"]
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"proto-ipv4" = []
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"proto-igmp" = ["proto-ipv4"]
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"proto-dhcpv4" = ["proto-ipv4", "socket-raw", "medium-ethernet"]
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"proto-dhcpv4" = ["proto-ipv4"]
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"proto-ipv6" = []
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"socket" = []
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"socket-raw" = ["socket"]
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"socket-udp" = ["socket"]
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"socket-tcp" = ["socket"]
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"socket-icmp" = ["socket"]
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"socket-dhcpv4" = ["socket", "medium-ethernet", "proto-dhcpv4"]
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"async" = []
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defmt-trace = []
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@ -59,7 +60,7 @@ default = [
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"medium-ethernet", "medium-ip",
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"phy-raw_socket", "phy-tuntap_interface",
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"proto-ipv4", "proto-igmp", "proto-dhcpv4", "proto-ipv6",
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"socket-raw", "socket-icmp", "socket-udp", "socket-tcp",
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"socket-raw", "socket-icmp", "socket-udp", "socket-tcp", "socket-dhcpv4",
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"async"
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]
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@ -3,12 +3,13 @@ mod utils;
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use std::collections::BTreeMap;
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use std::os::unix::io::AsRawFd;
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use smoltcp::phy::{Device, Medium, wait as phy_wait};
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use log::*;
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use smoltcp::{phy::{Device, Medium, wait as phy_wait}, time::Duration};
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use smoltcp::wire::{EthernetAddress, Ipv4Address, IpCidr, Ipv4Cidr};
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use smoltcp::iface::{NeighborCache, InterfaceBuilder, Routes};
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use smoltcp::socket::{SocketSet, RawSocketBuffer, RawPacketMetadata};
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use smoltcp::iface::{NeighborCache, InterfaceBuilder, Interface, Routes};
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use smoltcp::socket::{SocketSet, Dhcpv4Socket, Dhcpv4Event};
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use smoltcp::time::Instant;
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use smoltcp::dhcp::Dhcpv4Client;
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fn main() {
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#[cfg(feature = "log")]
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@ -41,65 +42,61 @@ fn main() {
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let mut iface = builder.finalize();
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let mut sockets = SocketSet::new(vec![]);
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let dhcp_rx_buffer = RawSocketBuffer::new(
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[RawPacketMetadata::EMPTY; 1],
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vec![0; 900]
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);
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let dhcp_tx_buffer = RawSocketBuffer::new(
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[RawPacketMetadata::EMPTY; 1],
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vec![0; 600]
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);
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let mut dhcp = Dhcpv4Client::new(&mut sockets, dhcp_rx_buffer, dhcp_tx_buffer, Instant::now());
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let mut prev_cidr = Ipv4Cidr::new(Ipv4Address::UNSPECIFIED, 0);
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let mut dhcp_socket = Dhcpv4Socket::new();
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// Set a ridiculously short max lease time to show DHCP renews work properly.
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// This will cause the DHCP client to start renewing after 5 seconds, and give up the
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// lease after 10 seconds if renew hasn't succeeded.
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// IMPORTANT: This should be removed in production.
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dhcp_socket.set_max_lease_duration(Some(Duration::from_secs(10)));
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let dhcp_handle = sockets.add(dhcp_socket);
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loop {
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let timestamp = Instant::now();
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iface.poll(&mut sockets, timestamp)
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.map(|_| ())
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.unwrap_or_else(|e| println!("Poll: {:?}", e));
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let config = dhcp.poll(&mut iface, &mut sockets, timestamp)
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.unwrap_or_else(|e| {
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println!("DHCP: {:?}", e);
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None
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});
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config.map(|config| {
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println!("DHCP config: {:?}", config);
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if let Some(cidr) = config.address {
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if cidr != prev_cidr {
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iface.update_ip_addrs(|addrs| {
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addrs.iter_mut().next()
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.map(|addr| {
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*addr = IpCidr::Ipv4(cidr);
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});
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});
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prev_cidr = cidr;
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println!("Assigned a new IPv4 address: {}", cidr);
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if let Err(e) = iface.poll(&mut sockets, timestamp) {
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debug!("poll error: {}", e);
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}
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match sockets.get::<Dhcpv4Socket>(dhcp_handle).poll() {
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None => {}
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Some(Dhcpv4Event::Configured(config)) => {
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debug!("DHCP config acquired!");
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debug!("IP address: {}", config.address);
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set_ipv4_addr(&mut iface, config.address);
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if let Some(router) = config.router {
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debug!("Default gateway: {}", router);
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iface.routes_mut().add_default_ipv4_route(router).unwrap();
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} else {
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debug!("Default gateway: None");
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iface.routes_mut().remove_default_ipv4_route();
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}
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for (i, s) in config.dns_servers.iter().enumerate() {
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if let Some(s) = s {
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debug!("DNS server {}: {}", i, s);
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}
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}
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}
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config.router.map(|router| iface.routes_mut()
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.add_default_ipv4_route(router)
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.unwrap()
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);
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iface.routes_mut()
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.update(|routes_map| {
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routes_map.get(&IpCidr::new(Ipv4Address::UNSPECIFIED.into(), 0))
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.map(|default_route| {
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println!("Default gateway: {}", default_route.via_router);
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});
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});
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if config.dns_servers.iter().any(|s| s.is_some()) {
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println!("DNS servers:");
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for dns_server in config.dns_servers.iter().filter_map(|s| *s) {
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println!("- {}", dns_server);
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}
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Some(Dhcpv4Event::Deconfigured) => {
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debug!("DHCP lost config!");
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set_ipv4_addr(&mut iface, Ipv4Cidr::new(Ipv4Address::UNSPECIFIED, 0));
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iface.routes_mut().remove_default_ipv4_route();
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}
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});
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}
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let mut timeout = dhcp.next_poll(timestamp);
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iface.poll_delay(&sockets, timestamp)
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.map(|sockets_timeout| timeout = sockets_timeout);
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phy_wait(fd, Some(timeout))
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.unwrap_or_else(|e| println!("Wait: {:?}", e));
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phy_wait(fd, iface.poll_delay(&sockets, timestamp)).expect("wait error");
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}
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}
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fn set_ipv4_addr<DeviceT>(iface: &mut Interface<'_, DeviceT>, cidr: Ipv4Cidr)
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where DeviceT: for<'d> Device<'d>
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{
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iface.update_ip_addrs(|addrs| {
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let dest = addrs.iter_mut().next().unwrap();
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*dest = IpCidr::Ipv4(cidr);
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});
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}
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@ -1,428 +0,0 @@
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use crate::{Result, Error};
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use crate::wire::{IpVersion, IpProtocol, IpEndpoint, IpAddress,
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Ipv4Cidr, Ipv4Address, Ipv4Packet, Ipv4Repr,
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UdpPacket, UdpRepr,
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DhcpPacket, DhcpRepr, DhcpMessageType};
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use crate::wire::dhcpv4::field as dhcpv4_field;
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use crate::socket::{SocketSet, SocketHandle, RawSocket, RawSocketBuffer};
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use crate::phy::{Device, ChecksumCapabilities};
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use crate::iface::Interface;
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use crate::time::{Instant, Duration};
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use super::{UDP_SERVER_PORT, UDP_CLIENT_PORT};
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const DISCOVER_TIMEOUT: u64 = 10;
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const REQUEST_TIMEOUT: u64 = 1;
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const REQUEST_RETRIES: u16 = 15;
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const DEFAULT_RENEW_INTERVAL: u32 = 60;
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const PARAMETER_REQUEST_LIST: &[u8] = &[
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dhcpv4_field::OPT_SUBNET_MASK,
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dhcpv4_field::OPT_ROUTER,
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dhcpv4_field::OPT_DOMAIN_NAME_SERVER,
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];
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/// IPv4 configuration data returned by `client.poll()`
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#[derive(Debug)]
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#[cfg_attr(feature = "defmt", derive(defmt::Format))]
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pub struct Config {
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pub address: Option<Ipv4Cidr>,
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pub router: Option<Ipv4Address>,
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pub dns_servers: [Option<Ipv4Address>; 3],
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}
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#[derive(Debug)]
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#[cfg_attr(feature = "defmt", derive(defmt::Format))]
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struct RequestState {
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retry: u16,
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endpoint_ip: Ipv4Address,
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server_identifier: Ipv4Address,
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requested_ip: Ipv4Address,
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}
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#[derive(Debug)]
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#[cfg_attr(feature = "defmt", derive(defmt::Format))]
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struct RenewState {
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endpoint_ip: Ipv4Address,
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server_identifier: Ipv4Address,
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}
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#[derive(Debug)]
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#[cfg_attr(feature = "defmt", derive(defmt::Format))]
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enum ClientState {
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/// Discovering the DHCP server
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Discovering,
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/// Requesting an address
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Requesting(RequestState),
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/// Having an address, refresh it periodically
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Renew(RenewState),
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}
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pub struct Client {
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state: ClientState,
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raw_handle: SocketHandle,
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/// When to send next request
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next_egress: Instant,
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/// When any existing DHCP address will expire.
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lease_expiration: Option<Instant>,
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transaction_id: u32,
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}
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/// DHCP client with a RawSocket.
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///
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/// To provide memory for the dynamic IP address, configure your
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/// `Interface` with one of `ip_addrs` and the `ipv4_gateway` being
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/// `Ipv4Address::UNSPECIFIED`. You must also assign this `0.0.0.0/0`
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/// while the client's state is `Discovering`. Hence, the `poll()`
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/// method returns a corresponding `Config` struct in this case.
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///
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/// You must call `dhcp_client.poll()` after `iface.poll()` to send
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/// and receive DHCP packets.
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impl Client {
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/// # Usage
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/// ```rust
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/// use smoltcp::socket::{SocketSet, RawSocketBuffer, RawPacketMetadata};
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/// use smoltcp::dhcp::Dhcpv4Client;
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/// use smoltcp::time::Instant;
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///
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/// let mut sockets = SocketSet::new(vec![]);
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/// let dhcp_rx_buffer = RawSocketBuffer::new(
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/// [RawPacketMetadata::EMPTY; 1],
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/// vec![0; 600]
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/// );
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/// let dhcp_tx_buffer = RawSocketBuffer::new(
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/// [RawPacketMetadata::EMPTY; 1],
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/// vec![0; 600]
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/// );
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/// let mut dhcp = Dhcpv4Client::new(
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/// &mut sockets,
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/// dhcp_rx_buffer, dhcp_tx_buffer,
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/// Instant::now()
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/// );
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/// ```
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pub fn new<'a>(sockets: &mut SocketSet<'a>, rx_buffer: RawSocketBuffer<'a>, tx_buffer: RawSocketBuffer<'a>, now: Instant) -> Self
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{
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let raw_socket = RawSocket::new(IpVersion::Ipv4, IpProtocol::Udp, rx_buffer, tx_buffer);
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let raw_handle = sockets.add(raw_socket);
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Client {
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state: ClientState::Discovering,
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raw_handle,
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next_egress: now,
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transaction_id: 1,
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lease_expiration: None,
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}
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}
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/// When to send next packet
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///
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/// Useful for suspending execution after polling.
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pub fn next_poll(&self, now: Instant) -> Duration {
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self.next_egress - now
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}
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/// Process incoming packets on the contained RawSocket, and send
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/// DHCP requests when timeouts are ready.
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///
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/// Applying the obtained network configuration is left to the
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/// user.
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///
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/// A Config can be returned from any valid DHCP reply. The client
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/// performs no bookkeeping on configuration or their changes.
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pub fn poll<DeviceT>(&mut self,
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iface: &mut Interface<DeviceT>, sockets: &mut SocketSet,
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now: Instant
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) -> Result<Option<Config>>
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where
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DeviceT: for<'d> Device<'d>,
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{
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let checksum_caps = iface.device().capabilities().checksum;
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let mut raw_socket = sockets.get::<RawSocket>(self.raw_handle);
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// Process incoming
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let config = {
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match raw_socket.recv()
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.and_then(|packet| parse_udp(packet, &checksum_caps)) {
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Ok((IpEndpoint {
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addr: IpAddress::Ipv4(src_ip),
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port: UDP_SERVER_PORT,
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}, IpEndpoint {
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addr: _,
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port: UDP_CLIENT_PORT,
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}, payload)) =>
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self.ingress(iface, now, payload, &src_ip),
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Ok(_) =>
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return Err(Error::Unrecognized),
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Err(Error::Exhausted) =>
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None,
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Err(e) =>
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return Err(e),
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}
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};
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if config.is_some() {
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// Return a new config immediately so that addresses can
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// be configured that are required by egress().
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Ok(config)
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} else {
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// Send requests
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if raw_socket.can_send() && now >= self.next_egress {
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self.egress(iface, &mut *raw_socket, &checksum_caps, now)
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} else {
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Ok(None)
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}
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}
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}
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fn ingress<DeviceT>(&mut self,
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iface: &mut Interface<DeviceT>, now: Instant,
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data: &[u8], src_ip: &Ipv4Address
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) -> Option<Config>
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where
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DeviceT: for<'d> Device<'d>,
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{
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let dhcp_packet = match DhcpPacket::new_checked(data) {
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Ok(dhcp_packet) => dhcp_packet,
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Err(e) => {
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net_debug!("DHCP invalid pkt from {}: {:?}", src_ip, e);
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return None;
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}
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};
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let dhcp_repr = match DhcpRepr::parse(&dhcp_packet) {
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Ok(dhcp_repr) => dhcp_repr,
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Err(e) => {
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net_debug!("DHCP error parsing pkt from {}: {:?}", src_ip, e);
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return None;
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}
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};
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let mac = iface.ethernet_addr();
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if dhcp_repr.client_hardware_address != mac { return None }
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if dhcp_repr.transaction_id != self.transaction_id { return None }
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let server_identifier = match dhcp_repr.server_identifier {
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Some(server_identifier) => server_identifier,
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None => return None,
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};
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net_debug!("DHCP recv {:?} from {} ({})", dhcp_repr.message_type, src_ip, server_identifier);
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// once we receive the ack, we can pass the config to the user
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let config = if dhcp_repr.message_type == DhcpMessageType::Ack {
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let lease_duration = dhcp_repr.lease_duration.unwrap_or(DEFAULT_RENEW_INTERVAL * 2);
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self.lease_expiration = Some(now + Duration::from_secs(lease_duration.into()));
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// RFC 2131 indicates clients should renew a lease halfway through its expiration.
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self.next_egress = now + Duration::from_secs((lease_duration / 2).into());
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let address = dhcp_repr.subnet_mask
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.and_then(|mask| IpAddress::Ipv4(mask).to_prefix_len())
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.map(|prefix_len| Ipv4Cidr::new(dhcp_repr.your_ip, prefix_len));
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let router = dhcp_repr.router;
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let dns_servers = dhcp_repr.dns_servers
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.unwrap_or([None; 3]);
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Some(Config { address, router, dns_servers })
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} else {
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None
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};
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match self.state {
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ClientState::Discovering
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if dhcp_repr.message_type == DhcpMessageType::Offer =>
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{
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self.next_egress = now;
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let r_state = RequestState {
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retry: 0,
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endpoint_ip: *src_ip,
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server_identifier,
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requested_ip: dhcp_repr.your_ip // use the offered ip
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};
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Some(ClientState::Requesting(r_state))
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}
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ClientState::Requesting(ref r_state)
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if dhcp_repr.message_type == DhcpMessageType::Ack &&
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server_identifier == r_state.server_identifier =>
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{
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let p_state = RenewState {
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endpoint_ip: *src_ip,
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server_identifier,
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};
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Some(ClientState::Renew(p_state))
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}
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_ => None
|
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}.map(|new_state| self.state = new_state);
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|
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config
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}
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|
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fn egress<DeviceT: for<'d> Device<'d>>(&mut self, iface: &mut Interface<DeviceT>, raw_socket: &mut RawSocket, checksum_caps: &ChecksumCapabilities, now: Instant) -> Result<Option<Config>> {
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// Reset after maximum amount of retries
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let retries_exceeded = match self.state {
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ClientState::Requesting(ref mut r_state) if r_state.retry >= REQUEST_RETRIES => {
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net_debug!("DHCP request retries exceeded, restarting discovery");
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true
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}
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_ => false
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||||
};
|
||||
|
||||
let lease_expired = self.lease_expiration.map_or(false, |expiration| now >= expiration);
|
||||
|
||||
if lease_expired || retries_exceeded {
|
||||
self.reset(now);
|
||||
// Return a config now so that user code assigns the
|
||||
// 0.0.0.0/0 address, which will be used sending a DHCP
|
||||
// discovery packet in the next call to egress().
|
||||
return Ok(Some(Config {
|
||||
address: Some(Ipv4Cidr::new(Ipv4Address::UNSPECIFIED, 0)),
|
||||
router: None,
|
||||
dns_servers: [None; 3],
|
||||
}));
|
||||
}
|
||||
|
||||
// Prepare sending next packet
|
||||
self.transaction_id += 1;
|
||||
let mac = iface.ethernet_addr();
|
||||
|
||||
let mut dhcp_repr = DhcpRepr {
|
||||
message_type: DhcpMessageType::Discover,
|
||||
transaction_id: self.transaction_id,
|
||||
client_hardware_address: mac,
|
||||
client_ip: Ipv4Address::UNSPECIFIED,
|
||||
your_ip: Ipv4Address::UNSPECIFIED,
|
||||
server_ip: Ipv4Address::UNSPECIFIED,
|
||||
router: None,
|
||||
subnet_mask: None,
|
||||
relay_agent_ip: Ipv4Address::UNSPECIFIED,
|
||||
broadcast: true,
|
||||
requested_ip: None,
|
||||
client_identifier: Some(mac),
|
||||
server_identifier: None,
|
||||
parameter_request_list: Some(PARAMETER_REQUEST_LIST),
|
||||
max_size: Some(raw_socket.payload_recv_capacity() as u16),
|
||||
lease_duration: None,
|
||||
dns_servers: None,
|
||||
};
|
||||
let mut send_packet = |iface, endpoint, dhcp_repr| {
|
||||
send_packet(iface, raw_socket, &endpoint, &dhcp_repr, checksum_caps)
|
||||
.map(|()| None)
|
||||
};
|
||||
|
||||
|
||||
match self.state {
|
||||
ClientState::Discovering => {
|
||||
self.next_egress = now + Duration::from_secs(DISCOVER_TIMEOUT);
|
||||
let endpoint = IpEndpoint {
|
||||
addr: Ipv4Address::BROADCAST.into(),
|
||||
port: UDP_SERVER_PORT,
|
||||
};
|
||||
net_trace!("DHCP send discover to {}: {:?}", endpoint, dhcp_repr);
|
||||
send_packet(iface, endpoint, dhcp_repr)
|
||||
}
|
||||
ClientState::Requesting(ref mut r_state) => {
|
||||
r_state.retry += 1;
|
||||
self.next_egress = now + Duration::from_secs(REQUEST_TIMEOUT);
|
||||
|
||||
let endpoint = IpEndpoint {
|
||||
addr: Ipv4Address::BROADCAST.into(),
|
||||
port: UDP_SERVER_PORT,
|
||||
};
|
||||
dhcp_repr.message_type = DhcpMessageType::Request;
|
||||
dhcp_repr.broadcast = false;
|
||||
dhcp_repr.requested_ip = Some(r_state.requested_ip);
|
||||
dhcp_repr.server_identifier = Some(r_state.server_identifier);
|
||||
net_trace!("DHCP send request to {} = {:?}", endpoint, dhcp_repr);
|
||||
send_packet(iface, endpoint, dhcp_repr)
|
||||
}
|
||||
ClientState::Renew(ref mut p_state) => {
|
||||
self.next_egress = now + Duration::from_secs(DEFAULT_RENEW_INTERVAL.into());
|
||||
|
||||
let endpoint = IpEndpoint {
|
||||
addr: p_state.endpoint_ip.into(),
|
||||
port: UDP_SERVER_PORT,
|
||||
};
|
||||
let client_ip = iface.ipv4_addr().unwrap_or(Ipv4Address::UNSPECIFIED);
|
||||
dhcp_repr.message_type = DhcpMessageType::Request;
|
||||
dhcp_repr.client_ip = client_ip;
|
||||
dhcp_repr.broadcast = false;
|
||||
net_trace!("DHCP send renew to {}: {:?}", endpoint, dhcp_repr);
|
||||
send_packet(iface, endpoint, dhcp_repr)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Reset state and restart discovery phase.
|
||||
///
|
||||
/// Use this to speed up acquisition of an address in a new
|
||||
/// network if a link was down and it is now back up.
|
||||
///
|
||||
/// You *must* configure a `0.0.0.0` address on your interface
|
||||
/// before the next call to `poll()`!
|
||||
pub fn reset(&mut self, now: Instant) {
|
||||
net_trace!("DHCP reset");
|
||||
self.state = ClientState::Discovering;
|
||||
self.next_egress = now;
|
||||
self.lease_expiration = None;
|
||||
}
|
||||
}
|
||||
|
||||
fn send_packet<DeviceT: for<'d> Device<'d>>(iface: &mut Interface<DeviceT>, raw_socket: &mut RawSocket, endpoint: &IpEndpoint, dhcp_repr: &DhcpRepr, checksum_caps: &ChecksumCapabilities) -> Result<()> {
|
||||
let mut dhcp_payload_buf = [0; 320];
|
||||
assert!(dhcp_repr.buffer_len() <= dhcp_payload_buf.len());
|
||||
let dhcp_payload = &mut dhcp_payload_buf[0..dhcp_repr.buffer_len()];
|
||||
{
|
||||
let mut dhcp_packet = DhcpPacket::new_checked(&mut dhcp_payload[..])?;
|
||||
dhcp_repr.emit(&mut dhcp_packet)?;
|
||||
}
|
||||
|
||||
let udp_repr = UdpRepr {
|
||||
src_port: UDP_CLIENT_PORT,
|
||||
dst_port: endpoint.port,
|
||||
payload: dhcp_payload,
|
||||
};
|
||||
|
||||
let src_addr = iface.ipv4_addr().unwrap();
|
||||
let dst_addr = match endpoint.addr {
|
||||
IpAddress::Ipv4(addr) => addr,
|
||||
_ => return Err(Error::Illegal),
|
||||
};
|
||||
let ipv4_repr = Ipv4Repr {
|
||||
src_addr,
|
||||
dst_addr,
|
||||
protocol: IpProtocol::Udp,
|
||||
payload_len: udp_repr.buffer_len(),
|
||||
hop_limit: 64,
|
||||
};
|
||||
|
||||
let mut packet = raw_socket.send(
|
||||
ipv4_repr.buffer_len() + udp_repr.buffer_len()
|
||||
)?;
|
||||
{
|
||||
let mut ipv4_packet = Ipv4Packet::new_unchecked(&mut packet);
|
||||
ipv4_repr.emit(&mut ipv4_packet, &checksum_caps);
|
||||
}
|
||||
{
|
||||
let mut udp_packet = UdpPacket::new_unchecked(
|
||||
&mut packet[ipv4_repr.buffer_len()..]
|
||||
);
|
||||
udp_repr.emit(&mut udp_packet,
|
||||
&src_addr.into(), &dst_addr.into(),
|
||||
checksum_caps);
|
||||
}
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn parse_udp<'a>(data: &'a [u8], checksum_caps: &ChecksumCapabilities) -> Result<(IpEndpoint, IpEndpoint, &'a [u8])> {
|
||||
let ipv4_packet = Ipv4Packet::new_checked(data)?;
|
||||
let ipv4_repr = Ipv4Repr::parse(&ipv4_packet, &checksum_caps)?;
|
||||
let udp_packet = UdpPacket::new_checked(ipv4_packet.payload())?;
|
||||
let udp_repr = UdpRepr::parse(
|
||||
&udp_packet,
|
||||
&ipv4_repr.src_addr.into(), &ipv4_repr.dst_addr.into(),
|
||||
checksum_caps
|
||||
)?;
|
||||
let src = IpEndpoint {
|
||||
addr: ipv4_repr.src_addr.into(),
|
||||
port: udp_repr.src_port,
|
||||
};
|
||||
let dst = IpEndpoint {
|
||||
addr: ipv4_repr.dst_addr.into(),
|
||||
port: udp_repr.dst_port,
|
||||
};
|
||||
let data = udp_repr.payload;
|
||||
Ok((src, dst, data))
|
||||
}
|
|
@ -1,5 +0,0 @@
|
|||
pub const UDP_SERVER_PORT: u16 = 67;
|
||||
pub const UDP_CLIENT_PORT: u16 = 68;
|
||||
|
||||
mod clientv4;
|
||||
pub use self::clientv4::{Client as Dhcpv4Client, Config as Dhcpv4Config};
|
|
@ -263,9 +263,11 @@ pub(crate) enum IpPacket<'a> {
|
|||
#[cfg(feature = "socket-raw")]
|
||||
Raw((IpRepr, &'a [u8])),
|
||||
#[cfg(feature = "socket-udp")]
|
||||
Udp((IpRepr, UdpRepr<'a>)),
|
||||
Udp((IpRepr, UdpRepr, &'a [u8])),
|
||||
#[cfg(feature = "socket-tcp")]
|
||||
Tcp((IpRepr, TcpRepr<'a>))
|
||||
Tcp((IpRepr, TcpRepr<'a>)),
|
||||
#[cfg(feature = "socket-dhcpv4")]
|
||||
Dhcpv4((Ipv4Repr, UdpRepr, DhcpRepr<'a>)),
|
||||
}
|
||||
|
||||
impl<'a> IpPacket<'a> {
|
||||
|
@ -280,16 +282,18 @@ impl<'a> IpPacket<'a> {
|
|||
#[cfg(feature = "socket-raw")]
|
||||
IpPacket::Raw((ip_repr, _)) => ip_repr.clone(),
|
||||
#[cfg(feature = "socket-udp")]
|
||||
IpPacket::Udp((ip_repr, _)) => ip_repr.clone(),
|
||||
IpPacket::Udp((ip_repr, _, _)) => ip_repr.clone(),
|
||||
#[cfg(feature = "socket-tcp")]
|
||||
IpPacket::Tcp((ip_repr, _)) => ip_repr.clone(),
|
||||
#[cfg(feature = "socket-dhcpv4")]
|
||||
IpPacket::Dhcpv4((ipv4_repr, _, _)) => IpRepr::Ipv4(*ipv4_repr),
|
||||
}
|
||||
}
|
||||
|
||||
pub(crate) fn emit_payload(&self, _ip_repr: IpRepr, payload: &mut [u8], caps: &DeviceCapabilities) {
|
||||
match self {
|
||||
#[cfg(feature = "proto-ipv4")]
|
||||
IpPacket::Icmpv4((_, icmpv4_repr)) =>
|
||||
IpPacket::Icmpv4((_, icmpv4_repr)) =>
|
||||
icmpv4_repr.emit(&mut Icmpv4Packet::new_unchecked(payload), &caps.checksum),
|
||||
#[cfg(feature = "proto-igmp")]
|
||||
IpPacket::Igmp((_, igmp_repr)) =>
|
||||
|
@ -302,9 +306,11 @@ impl<'a> IpPacket<'a> {
|
|||
IpPacket::Raw((_, raw_packet)) =>
|
||||
payload.copy_from_slice(raw_packet),
|
||||
#[cfg(feature = "socket-udp")]
|
||||
IpPacket::Udp((_, udp_repr)) =>
|
||||
IpPacket::Udp((_, udp_repr, inner_payload)) =>
|
||||
udp_repr.emit(&mut UdpPacket::new_unchecked(payload),
|
||||
&_ip_repr.src_addr(), &_ip_repr.dst_addr(), &caps.checksum),
|
||||
&_ip_repr.src_addr(), &_ip_repr.dst_addr(),
|
||||
inner_payload.len(), |buf| buf.copy_from_slice(inner_payload),
|
||||
&caps.checksum),
|
||||
#[cfg(feature = "socket-tcp")]
|
||||
IpPacket::Tcp((_, mut tcp_repr)) => {
|
||||
// This is a terrible hack to make TCP performance more acceptable on systems
|
||||
|
@ -329,6 +335,13 @@ impl<'a> IpPacket<'a> {
|
|||
&_ip_repr.src_addr(), &_ip_repr.dst_addr(),
|
||||
&caps.checksum);
|
||||
}
|
||||
#[cfg(feature = "socket-dhcpv4")]
|
||||
IpPacket::Dhcpv4((_, udp_repr, dhcp_repr)) =>
|
||||
udp_repr.emit(&mut UdpPacket::new_unchecked(payload),
|
||||
&_ip_repr.src_addr(), &_ip_repr.dst_addr(),
|
||||
dhcp_repr.buffer_len(),
|
||||
|buf| dhcp_repr.emit(&mut DhcpPacket::new_unchecked(buf)).unwrap(),
|
||||
&caps.checksum),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
@ -660,6 +673,14 @@ impl<'a, DeviceT> Interface<'a, DeviceT>
|
|||
})
|
||||
}
|
||||
|
||||
let _ip_mtu = match _caps.medium {
|
||||
#[cfg(feature = "medium-ethernet")]
|
||||
Medium::Ethernet => _caps.max_transmission_unit - EthernetFrame::<&[u8]>::header_len(),
|
||||
#[cfg(feature = "medium-ip")]
|
||||
Medium::Ip => _caps.max_transmission_unit,
|
||||
};
|
||||
|
||||
|
||||
let socket_result =
|
||||
match *socket {
|
||||
#[cfg(feature = "socket-raw")]
|
||||
|
@ -685,15 +706,14 @@ impl<'a, DeviceT> Interface<'a, DeviceT>
|
|||
respond!(IpPacket::Udp(response))),
|
||||
#[cfg(feature = "socket-tcp")]
|
||||
Socket::Tcp(ref mut socket) => {
|
||||
let ip_mtu = match _caps.medium {
|
||||
#[cfg(feature = "medium-ethernet")]
|
||||
Medium::Ethernet => _caps.max_transmission_unit - EthernetFrame::<&[u8]>::header_len(),
|
||||
#[cfg(feature = "medium-ip")]
|
||||
Medium::Ip => _caps.max_transmission_unit,
|
||||
};
|
||||
socket.dispatch(timestamp, ip_mtu, |response|
|
||||
socket.dispatch(timestamp, _ip_mtu, |response|
|
||||
respond!(IpPacket::Tcp(response)))
|
||||
}
|
||||
#[cfg(feature = "socket-dhcpv4")]
|
||||
Socket::Dhcpv4(ref mut socket) =>
|
||||
// todo don't unwrap
|
||||
socket.dispatch(timestamp, inner.ethernet_addr.unwrap(), _ip_mtu, |response|
|
||||
respond!(IpPacket::Dhcpv4(response))),
|
||||
};
|
||||
|
||||
match (device_result, socket_result) {
|
||||
|
@ -880,7 +900,7 @@ impl<'a> InterfaceInner<'a> {
|
|||
self.neighbor_cache.as_mut().unwrap().fill(ip_addr, eth_frame.src_addr(), timestamp);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
self.process_ipv6(sockets, timestamp, &ipv6_packet).map(|o| o.map(EthernetPacket::Ip))
|
||||
}
|
||||
// Drop all other traffic.
|
||||
|
@ -1061,6 +1081,34 @@ impl<'a> InterfaceInner<'a> {
|
|||
#[cfg(not(feature = "socket-raw"))]
|
||||
let handled_by_raw_socket = false;
|
||||
|
||||
|
||||
#[cfg(feature = "socket-dhcpv4")]
|
||||
{
|
||||
if ipv4_repr.protocol == IpProtocol::Udp && self.ethernet_addr.is_some() {
|
||||
// First check for source and dest ports, then do `UdpRepr::parse` if they match.
|
||||
// This way we avoid validating the UDP checksum twice for all non-DHCP UDP packets (one here, one in `process_udp`)
|
||||
let udp_packet = UdpPacket::new_checked(ip_payload)?;
|
||||
if udp_packet.src_port() == DHCP_SERVER_PORT && udp_packet.dst_port() == DHCP_CLIENT_PORT {
|
||||
if let Some(mut dhcp_socket) = sockets.iter_mut().filter_map(Dhcpv4Socket::downcast).next() {
|
||||
let (src_addr, dst_addr) = (ip_repr.src_addr(), ip_repr.dst_addr());
|
||||
let checksum_caps = self.device_capabilities.checksum.clone();
|
||||
let udp_repr = UdpRepr::parse(&udp_packet, &src_addr, &dst_addr, &checksum_caps)?;
|
||||
let udp_payload = udp_packet.payload();
|
||||
|
||||
// NOTE(unwrap): we checked for is_some above.
|
||||
let ethernet_addr = self.ethernet_addr.unwrap();
|
||||
|
||||
match dhcp_socket.process(timestamp, ethernet_addr, &ipv4_repr, &udp_repr, udp_payload) {
|
||||
// The packet is valid and handled by socket.
|
||||
Ok(()) => return Ok(None),
|
||||
// The packet is malformed, or the socket buffer is full.
|
||||
Err(e) => return Err(e)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if !self.has_ip_addr(ipv4_repr.dst_addr) &&
|
||||
!self.has_multicast_group(ipv4_repr.dst_addr) &&
|
||||
!self.is_broadcast_v4(ipv4_repr.dst_addr) {
|
||||
|
@ -1439,11 +1487,12 @@ impl<'a> InterfaceInner<'a> {
|
|||
let udp_packet = UdpPacket::new_checked(ip_payload)?;
|
||||
let checksum_caps = self.device_capabilities.checksum.clone();
|
||||
let udp_repr = UdpRepr::parse(&udp_packet, &src_addr, &dst_addr, &checksum_caps)?;
|
||||
let udp_payload = udp_packet.payload();
|
||||
|
||||
for mut udp_socket in sockets.iter_mut().filter_map(UdpSocket::downcast) {
|
||||
if !udp_socket.accepts(&ip_repr, &udp_repr) { continue }
|
||||
|
||||
match udp_socket.process(&ip_repr, &udp_repr) {
|
||||
match udp_socket.process(&ip_repr, &udp_repr, udp_payload) {
|
||||
// The packet is valid and handled by socket.
|
||||
Ok(()) => return Ok(None),
|
||||
// The packet is malformed, or the socket buffer is full.
|
||||
|
@ -1787,6 +1836,13 @@ mod test {
|
|||
use crate::socket::SocketSet;
|
||||
use crate::phy::{Loopback, ChecksumCapabilities};
|
||||
|
||||
#[allow(unused)]
|
||||
fn fill_slice(s: &mut [u8], val: u8) {
|
||||
for x in s.iter_mut() {
|
||||
*x = val
|
||||
}
|
||||
}
|
||||
|
||||
fn create_loopback<'a>() -> (Interface<'a, Loopback>, SocketSet<'a>) {
|
||||
#[cfg(feature = "medium-ethernet")]
|
||||
return create_loopback_ethernet();
|
||||
|
@ -2035,20 +2091,21 @@ mod test {
|
|||
let udp_repr = UdpRepr {
|
||||
src_port: 67,
|
||||
dst_port: 68,
|
||||
payload: &UDP_PAYLOAD
|
||||
};
|
||||
|
||||
let ip_repr = IpRepr::Ipv4(Ipv4Repr {
|
||||
src_addr: Ipv4Address([0x7f, 0x00, 0x00, 0x02]),
|
||||
dst_addr: Ipv4Address([0x7f, 0x00, 0x00, 0x01]),
|
||||
protocol: IpProtocol::Udp,
|
||||
payload_len: udp_repr.buffer_len(),
|
||||
payload_len: udp_repr.header_len() + UDP_PAYLOAD.len(),
|
||||
hop_limit: 64
|
||||
});
|
||||
|
||||
// Emit the representations to a packet
|
||||
udp_repr.emit(&mut packet_unicast, &ip_repr.src_addr(),
|
||||
&ip_repr.dst_addr(), &ChecksumCapabilities::default());
|
||||
&ip_repr.dst_addr(),
|
||||
UDP_PAYLOAD.len(), |buf| buf.copy_from_slice( &UDP_PAYLOAD),
|
||||
&ChecksumCapabilities::default());
|
||||
|
||||
let data = packet_unicast.into_inner();
|
||||
|
||||
|
@ -2060,7 +2117,7 @@ mod test {
|
|||
src_addr: Ipv4Address([0x7f, 0x00, 0x00, 0x02]),
|
||||
dst_addr: Ipv4Address([0x7f, 0x00, 0x00, 0x01]),
|
||||
protocol: IpProtocol::Udp,
|
||||
payload_len: udp_repr.buffer_len(),
|
||||
payload_len: udp_repr.header_len() + UDP_PAYLOAD.len(),
|
||||
hop_limit: 64
|
||||
},
|
||||
data: &data
|
||||
|
@ -2085,13 +2142,14 @@ mod test {
|
|||
src_addr: Ipv4Address([0x7f, 0x00, 0x00, 0x02]),
|
||||
dst_addr: Ipv4Address::BROADCAST,
|
||||
protocol: IpProtocol::Udp,
|
||||
payload_len: udp_repr.buffer_len(),
|
||||
payload_len: udp_repr.header_len() + UDP_PAYLOAD.len(),
|
||||
hop_limit: 64
|
||||
});
|
||||
|
||||
// Emit the representations to a packet
|
||||
udp_repr.emit(&mut packet_broadcast, &ip_repr.src_addr(),
|
||||
&IpAddress::Ipv4(Ipv4Address::BROADCAST),
|
||||
UDP_PAYLOAD.len(), |buf| buf.copy_from_slice( &UDP_PAYLOAD),
|
||||
&ChecksumCapabilities::default());
|
||||
|
||||
// Ensure that the port unreachable error does not trigger an
|
||||
|
@ -2129,7 +2187,6 @@ mod test {
|
|||
let udp_repr = UdpRepr {
|
||||
src_port: 67,
|
||||
dst_port: 68,
|
||||
payload: &UDP_PAYLOAD
|
||||
};
|
||||
|
||||
#[cfg(feature = "proto-ipv6")]
|
||||
|
@ -2137,7 +2194,7 @@ mod test {
|
|||
src_addr: src_ip,
|
||||
dst_addr: Ipv6Address::LINK_LOCAL_ALL_NODES,
|
||||
next_header: IpProtocol::Udp,
|
||||
payload_len: udp_repr.buffer_len(),
|
||||
payload_len: udp_repr.header_len() + UDP_PAYLOAD.len(),
|
||||
hop_limit: 0x40
|
||||
});
|
||||
#[cfg(all(not(feature = "proto-ipv6"), feature = "proto-ipv4"))]
|
||||
|
@ -2145,7 +2202,7 @@ mod test {
|
|||
src_addr: src_ip,
|
||||
dst_addr: Ipv4Address::BROADCAST,
|
||||
protocol: IpProtocol::Udp,
|
||||
payload_len: udp_repr.buffer_len(),
|
||||
payload_len: udp_repr.header_len() + UDP_PAYLOAD.len(),
|
||||
hop_limit: 0x40
|
||||
});
|
||||
|
||||
|
@ -2158,6 +2215,7 @@ mod test {
|
|||
}
|
||||
|
||||
udp_repr.emit(&mut packet, &ip_repr.src_addr(), &ip_repr.dst_addr(),
|
||||
UDP_PAYLOAD.len(), |buf| buf.copy_from_slice( &UDP_PAYLOAD),
|
||||
&ChecksumCapabilities::default());
|
||||
|
||||
// Packet should be handled by bound UDP socket
|
||||
|
@ -2260,18 +2318,19 @@ mod test {
|
|||
let udp_repr = UdpRepr {
|
||||
src_port: 67,
|
||||
dst_port: 68,
|
||||
payload: &[0x2a; MAX_PAYLOAD_LEN]
|
||||
};
|
||||
let mut bytes = vec![0xff; udp_repr.buffer_len()];
|
||||
let mut bytes = vec![0xff; udp_repr.header_len() + MAX_PAYLOAD_LEN];
|
||||
let mut packet = UdpPacket::new_unchecked(&mut bytes[..]);
|
||||
udp_repr.emit(&mut packet, &src_addr.into(), &dst_addr.into(), &ChecksumCapabilities::default());
|
||||
udp_repr.emit(&mut packet, &src_addr.into(), &dst_addr.into(),
|
||||
MAX_PAYLOAD_LEN, |buf| fill_slice(buf, 0x2a),
|
||||
&ChecksumCapabilities::default());
|
||||
#[cfg(all(feature = "proto-ipv4", not(feature = "proto-ipv6")))]
|
||||
let ip_repr = Ipv4Repr {
|
||||
src_addr: src_addr,
|
||||
dst_addr: dst_addr,
|
||||
protocol: IpProtocol::Udp,
|
||||
hop_limit: 64,
|
||||
payload_len: udp_repr.buffer_len()
|
||||
payload_len: udp_repr.header_len() + MAX_PAYLOAD_LEN
|
||||
};
|
||||
#[cfg(feature = "proto-ipv6")]
|
||||
let ip_repr = Ipv6Repr {
|
||||
|
@ -2279,7 +2338,7 @@ mod test {
|
|||
dst_addr: dst_addr,
|
||||
next_header: IpProtocol::Udp,
|
||||
hop_limit: 64,
|
||||
payload_len: udp_repr.buffer_len()
|
||||
payload_len: udp_repr.header_len() + MAX_PAYLOAD_LEN
|
||||
};
|
||||
let payload = packet.into_inner();
|
||||
|
||||
|
@ -2619,7 +2678,7 @@ mod test {
|
|||
recv_all(&mut iface, timestamp)
|
||||
.iter()
|
||||
.filter_map(|frame| {
|
||||
|
||||
|
||||
let ipv4_packet = match caps.medium {
|
||||
#[cfg(feature = "medium-ethernet")]
|
||||
Medium::Ethernet => {
|
||||
|
@ -2666,11 +2725,11 @@ mod test {
|
|||
// General query
|
||||
let timestamp = Instant::now();
|
||||
const GENERAL_QUERY_BYTES: &[u8] = &[
|
||||
0x46, 0xc0, 0x00, 0x24, 0xed, 0xb4, 0x00, 0x00,
|
||||
0x01, 0x02, 0x47, 0x43, 0xac, 0x16, 0x63, 0x04,
|
||||
0xe0, 0x00, 0x00, 0x01, 0x94, 0x04, 0x00, 0x00,
|
||||
0x11, 0x64, 0xec, 0x8f, 0x00, 0x00, 0x00, 0x00,
|
||||
0x02, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x46, 0xc0, 0x00, 0x24, 0xed, 0xb4, 0x00, 0x00,
|
||||
0x01, 0x02, 0x47, 0x43, 0xac, 0x16, 0x63, 0x04,
|
||||
0xe0, 0x00, 0x00, 0x01, 0x94, 0x04, 0x00, 0x00,
|
||||
0x11, 0x64, 0xec, 0x8f, 0x00, 0x00, 0x00, 0x00,
|
||||
0x02, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
||||
0x00, 0x00, 0x00, 0x00, 0x00, 0x00
|
||||
];
|
||||
{
|
||||
|
@ -2722,25 +2781,28 @@ mod test {
|
|||
let src_addr = Ipv4Address([127, 0, 0, 2]);
|
||||
let dst_addr = Ipv4Address([127, 0, 0, 1]);
|
||||
|
||||
const PAYLOAD_LEN: usize = 10;
|
||||
|
||||
let udp_repr = UdpRepr {
|
||||
src_port: 67,
|
||||
dst_port: 68,
|
||||
payload: &[0x2a; 10]
|
||||
};
|
||||
let mut bytes = vec![0xff; udp_repr.buffer_len()];
|
||||
let mut bytes = vec![0xff; udp_repr.header_len() + PAYLOAD_LEN];
|
||||
let mut packet = UdpPacket::new_unchecked(&mut bytes[..]);
|
||||
udp_repr.emit(&mut packet, &src_addr.into(), &dst_addr.into(), &ChecksumCapabilities::default());
|
||||
udp_repr.emit(&mut packet, &src_addr.into(), &dst_addr.into(),
|
||||
PAYLOAD_LEN, |buf| fill_slice(buf, 0x2a),
|
||||
&ChecksumCapabilities::default());
|
||||
let ipv4_repr = Ipv4Repr {
|
||||
src_addr: src_addr,
|
||||
dst_addr: dst_addr,
|
||||
protocol: IpProtocol::Udp,
|
||||
hop_limit: 64,
|
||||
payload_len: udp_repr.buffer_len()
|
||||
payload_len: udp_repr.header_len() + PAYLOAD_LEN
|
||||
};
|
||||
|
||||
// Emit to frame
|
||||
let mut bytes = vec![0u8;
|
||||
ipv4_repr.buffer_len() + udp_repr.buffer_len()
|
||||
ipv4_repr.buffer_len() + udp_repr.header_len() + PAYLOAD_LEN
|
||||
];
|
||||
let frame = {
|
||||
ipv4_repr.emit(
|
||||
|
@ -2751,6 +2813,7 @@ mod test {
|
|||
&mut bytes[ipv4_repr.buffer_len()..]),
|
||||
&src_addr.into(),
|
||||
&dst_addr.into(),
|
||||
PAYLOAD_LEN, |buf| fill_slice(buf, 0x2a),
|
||||
&ChecksumCapabilities::default());
|
||||
Ipv4Packet::new_unchecked(&bytes)
|
||||
};
|
||||
|
@ -2776,25 +2839,28 @@ mod test {
|
|||
let src_addr = Ipv4Address([127, 0, 0, 2]);
|
||||
let dst_addr = Ipv4Address([127, 0, 0, 1]);
|
||||
|
||||
const PAYLOAD_LEN: usize = 49; // 49 > 48, hence packet will be truncated
|
||||
|
||||
let udp_repr = UdpRepr {
|
||||
src_port: 67,
|
||||
dst_port: 68,
|
||||
payload: &[0x2a; 49] // 49 > 48, hence packet will be truncated
|
||||
};
|
||||
let mut bytes = vec![0xff; udp_repr.buffer_len()];
|
||||
let mut bytes = vec![0xff; udp_repr.header_len() + PAYLOAD_LEN];
|
||||
let mut packet = UdpPacket::new_unchecked(&mut bytes[..]);
|
||||
udp_repr.emit(&mut packet, &src_addr.into(), &dst_addr.into(), &ChecksumCapabilities::default());
|
||||
udp_repr.emit(&mut packet, &src_addr.into(), &dst_addr.into(),
|
||||
PAYLOAD_LEN, |buf| fill_slice(buf, 0x2a),
|
||||
&ChecksumCapabilities::default());
|
||||
let ipv4_repr = Ipv4Repr {
|
||||
src_addr: src_addr,
|
||||
dst_addr: dst_addr,
|
||||
protocol: IpProtocol::Udp,
|
||||
hop_limit: 64,
|
||||
payload_len: udp_repr.buffer_len()
|
||||
payload_len: udp_repr.header_len() + PAYLOAD_LEN
|
||||
};
|
||||
|
||||
// Emit to frame
|
||||
let mut bytes = vec![0u8;
|
||||
ipv4_repr.buffer_len() + udp_repr.buffer_len()
|
||||
ipv4_repr.buffer_len() + udp_repr.header_len() + PAYLOAD_LEN
|
||||
];
|
||||
let frame = {
|
||||
ipv4_repr.emit(
|
||||
|
@ -2802,9 +2868,10 @@ mod test {
|
|||
&ChecksumCapabilities::default());
|
||||
udp_repr.emit(
|
||||
&mut UdpPacket::new_unchecked(
|
||||
&mut bytes[ipv4_repr.buffer_len()..]),
|
||||
&mut bytes[ipv4_repr.buffer_len()..]),
|
||||
&src_addr.into(),
|
||||
&dst_addr.into(),
|
||||
PAYLOAD_LEN, |buf| fill_slice(buf, 0x2a),
|
||||
&ChecksumCapabilities::default());
|
||||
Ipv4Packet::new_unchecked(&bytes)
|
||||
};
|
||||
|
@ -2812,7 +2879,7 @@ mod test {
|
|||
let frame = iface.inner.process_ipv4(&mut socket_set, Instant::from_millis(0), &frame);
|
||||
|
||||
// because the packet could not be handled we should send an Icmp message
|
||||
assert!(match frame {
|
||||
assert!(match frame {
|
||||
Ok(Some(IpPacket::Icmpv4(_))) => true,
|
||||
_ => false,
|
||||
});
|
||||
|
@ -2853,22 +2920,23 @@ mod test {
|
|||
let udp_repr = UdpRepr {
|
||||
src_port: 67,
|
||||
dst_port: 68,
|
||||
payload: &UDP_PAYLOAD
|
||||
};
|
||||
let mut bytes = vec![0xff; udp_repr.buffer_len()];
|
||||
let mut bytes = vec![0xff; udp_repr.header_len() + UDP_PAYLOAD.len()];
|
||||
let mut packet = UdpPacket::new_unchecked(&mut bytes[..]);
|
||||
udp_repr.emit(&mut packet, &src_addr.into(), &dst_addr.into(), &ChecksumCapabilities::default());
|
||||
udp_repr.emit(&mut packet, &src_addr.into(), &dst_addr.into(),
|
||||
UDP_PAYLOAD.len(), |buf| buf.copy_from_slice( &UDP_PAYLOAD),
|
||||
&ChecksumCapabilities::default());
|
||||
let ipv4_repr = Ipv4Repr {
|
||||
src_addr: src_addr,
|
||||
dst_addr: dst_addr,
|
||||
protocol: IpProtocol::Udp,
|
||||
hop_limit: 64,
|
||||
payload_len: udp_repr.buffer_len()
|
||||
payload_len: udp_repr.header_len() + UDP_PAYLOAD.len()
|
||||
};
|
||||
|
||||
// Emit to frame
|
||||
let mut bytes = vec![0u8;
|
||||
ipv4_repr.buffer_len() + udp_repr.buffer_len()
|
||||
ipv4_repr.buffer_len() + udp_repr.header_len() + UDP_PAYLOAD.len()
|
||||
];
|
||||
let frame = {
|
||||
ipv4_repr.emit(
|
||||
|
@ -2876,9 +2944,10 @@ mod test {
|
|||
&ChecksumCapabilities::default());
|
||||
udp_repr.emit(
|
||||
&mut UdpPacket::new_unchecked(
|
||||
&mut bytes[ipv4_repr.buffer_len()..]),
|
||||
&mut bytes[ipv4_repr.buffer_len()..]),
|
||||
&src_addr.into(),
|
||||
&dst_addr.into(),
|
||||
UDP_PAYLOAD.len(), |buf| buf.copy_from_slice( &UDP_PAYLOAD),
|
||||
&ChecksumCapabilities::default());
|
||||
Ipv4Packet::new_unchecked(&bytes)
|
||||
};
|
||||
|
|
|
@ -106,6 +106,24 @@ impl<'a> Routes<'a> {
|
|||
}
|
||||
}
|
||||
|
||||
/// Remove the default ipv4 gateway
|
||||
///
|
||||
/// On success, returns the previous default route, if any.
|
||||
#[cfg(feature = "proto-ipv4")]
|
||||
pub fn remove_default_ipv4_route(&mut self) -> Option<Route> {
|
||||
let cidr = IpCidr::new(IpAddress::v4(0, 0, 0, 0), 0);
|
||||
self.storage.remove(&cidr)
|
||||
}
|
||||
|
||||
/// Remove the default ipv6 gateway
|
||||
///
|
||||
/// On success, returns the previous default route, if any.
|
||||
#[cfg(feature = "proto-ipv6")]
|
||||
pub fn remove_default_ipv6_route(&mut self) -> Option<Route> {
|
||||
let cidr = IpCidr::new(IpAddress::v6(0, 0, 0, 0, 0, 0, 0, 0), 0);
|
||||
self.storage.remove(&cidr)
|
||||
}
|
||||
|
||||
pub(crate) fn lookup(&self, addr: &IpAddress, timestamp: Instant) ->
|
||||
Option<IpAddress> {
|
||||
assert!(addr.is_unicast());
|
||||
|
|
|
@ -121,8 +121,6 @@ pub mod iface;
|
|||
#[cfg(feature = "socket")]
|
||||
pub mod socket;
|
||||
pub mod time;
|
||||
#[cfg(feature = "proto-dhcpv4")]
|
||||
pub mod dhcp;
|
||||
|
||||
/// The error type for the networking stack.
|
||||
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
|
||||
|
|
|
@ -12,7 +12,6 @@ macro_rules! net_log {
|
|||
}
|
||||
|
||||
#[cfg(not(any(feature = "log", feature = "defmt")))]
|
||||
#[macro_use]
|
||||
macro_rules! net_log {
|
||||
($level:ident, $($arg:expr),*) => { $( let _ = $arg; )* }
|
||||
}
|
||||
|
|
|
@ -0,0 +1,458 @@
|
|||
use crate::{Error, Result};
|
||||
use crate::wire::{EthernetAddress, IpProtocol, IpAddress,
|
||||
Ipv4Cidr, Ipv4Address, Ipv4Repr,
|
||||
UdpRepr, UDP_HEADER_LEN,
|
||||
DhcpPacket, DhcpRepr, DhcpMessageType, DHCP_CLIENT_PORT, DHCP_SERVER_PORT, DHCP_MAX_DNS_SERVER_COUNT};
|
||||
use crate::wire::dhcpv4::{field as dhcpv4_field};
|
||||
use crate::socket::SocketMeta;
|
||||
use crate::time::{Instant, Duration};
|
||||
|
||||
use super::{PollAt, Socket};
|
||||
|
||||
const DISCOVER_TIMEOUT: Duration = Duration::from_secs(10);
|
||||
|
||||
// timeout doubles every 2 tries.
|
||||
// total time 5 + 5 + 10 + 10 + 20 = 50s
|
||||
const REQUEST_TIMEOUT: Duration = Duration::from_secs(5);
|
||||
const REQUEST_RETRIES: u16 = 5;
|
||||
|
||||
const MIN_RENEW_TIMEOUT: Duration = Duration::from_secs(60);
|
||||
|
||||
const DEFAULT_LEASE_DURATION: Duration = Duration::from_secs(120);
|
||||
|
||||
const PARAMETER_REQUEST_LIST: &[u8] = &[
|
||||
dhcpv4_field::OPT_SUBNET_MASK,
|
||||
dhcpv4_field::OPT_ROUTER,
|
||||
dhcpv4_field::OPT_DOMAIN_NAME_SERVER,
|
||||
];
|
||||
|
||||
/// IPv4 configuration data provided by the DHCP server.
|
||||
#[derive(Debug, Eq, PartialEq)]
|
||||
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
|
||||
pub struct Config {
|
||||
/// IP address
|
||||
pub address: Ipv4Cidr,
|
||||
/// Router address, also known as default gateway. Does not necessarily
|
||||
/// match the DHCP server's address.
|
||||
pub router: Option<Ipv4Address>,
|
||||
/// DNS servers
|
||||
pub dns_servers: [Option<Ipv4Address>; DHCP_MAX_DNS_SERVER_COUNT],
|
||||
}
|
||||
|
||||
/// Information on how to reach a DHCP server.
|
||||
#[derive(Debug, Clone, Copy)]
|
||||
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
|
||||
struct ServerInfo {
|
||||
/// IP address to use as destination in outgoing packets
|
||||
address: Ipv4Address,
|
||||
/// Server identifier to use in outgoing packets. Usually equal to server_address,
|
||||
/// but may differ in some situations (eg DHCP relays)
|
||||
identifier: Ipv4Address,
|
||||
}
|
||||
|
||||
#[derive(Debug)]
|
||||
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
|
||||
struct DiscoverState {
|
||||
/// When to send next request
|
||||
retry_at: Instant,
|
||||
}
|
||||
|
||||
#[derive(Debug)]
|
||||
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
|
||||
struct RequestState {
|
||||
/// When to send next request
|
||||
retry_at: Instant,
|
||||
/// How many retries have been done
|
||||
retry: u16,
|
||||
/// Server we're trying to request from
|
||||
server: ServerInfo,
|
||||
/// IP address that we're trying to request.
|
||||
requested_ip: Ipv4Address,
|
||||
}
|
||||
|
||||
#[derive(Debug)]
|
||||
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
|
||||
struct RenewState {
|
||||
/// Server that gave us the lease
|
||||
server: ServerInfo,
|
||||
/// Active network config
|
||||
config: Config,
|
||||
|
||||
/// Renew timer. When reached, we will start attempting
|
||||
/// to renew this lease with the DHCP server.
|
||||
/// Must be less or equal than `expires_at`.
|
||||
renew_at: Instant,
|
||||
/// Expiration timer. When reached, this lease is no longer valid, so it must be
|
||||
/// thrown away and the ethernet interface deconfigured.
|
||||
expires_at: Instant,
|
||||
}
|
||||
|
||||
#[derive(Debug)]
|
||||
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
|
||||
enum ClientState {
|
||||
/// Discovering the DHCP server
|
||||
Discovering(DiscoverState),
|
||||
/// Requesting an address
|
||||
Requesting(RequestState),
|
||||
/// Having an address, refresh it periodically.
|
||||
Renewing(RenewState),
|
||||
}
|
||||
|
||||
/// Return value for the `Dhcpv4Socket::poll` function
|
||||
pub enum Event<'a> {
|
||||
/// Configuration has been lost (for example, the lease has expired)
|
||||
Deconfigured,
|
||||
/// Configuration has been newly acquired, or modified.
|
||||
Configured(&'a Config),
|
||||
}
|
||||
|
||||
#[derive(Debug)]
|
||||
pub struct Dhcpv4Socket {
|
||||
pub(crate) meta: SocketMeta,
|
||||
/// State of the DHCP client.
|
||||
state: ClientState,
|
||||
/// Set to true on config/state change, cleared back to false by the `config` function.
|
||||
config_changed: bool,
|
||||
/// xid of the last sent message.
|
||||
transaction_id: u32,
|
||||
|
||||
/// Max lease duration. If set, it sets a maximum cap to the server-provided lease duration.
|
||||
/// Useful to react faster to IP configuration changes and to test whether renews work correctly.
|
||||
max_lease_duration: Option<Duration>,
|
||||
}
|
||||
|
||||
/// DHCP client socket.
|
||||
///
|
||||
/// The socket acquires an IP address configuration through DHCP autonomously.
|
||||
/// You must query the configuration with `.poll()` after every call to `Interface::poll()`,
|
||||
/// and apply the configuration to the `Interface`.
|
||||
impl Dhcpv4Socket {
|
||||
/// Create a DHCPv4 socket
|
||||
#[allow(clippy::new_without_default)]
|
||||
pub fn new() -> Self {
|
||||
Dhcpv4Socket {
|
||||
meta: SocketMeta::default(),
|
||||
state: ClientState::Discovering(DiscoverState{
|
||||
retry_at: Instant::from_millis(0),
|
||||
}),
|
||||
config_changed: true,
|
||||
transaction_id: 1,
|
||||
max_lease_duration: None,
|
||||
}
|
||||
}
|
||||
|
||||
pub fn max_lease_duration(&self) -> Option<Duration> {
|
||||
self.max_lease_duration
|
||||
}
|
||||
|
||||
pub fn set_max_lease_duration(&mut self, max_lease_duration: Option<Duration>) {
|
||||
self.max_lease_duration = max_lease_duration;
|
||||
}
|
||||
|
||||
pub(crate) fn poll_at(&self) -> PollAt {
|
||||
let t = match &self.state {
|
||||
ClientState::Discovering(state) => state.retry_at,
|
||||
ClientState::Requesting(state) => state.retry_at,
|
||||
ClientState::Renewing(state) => state.renew_at.min(state.expires_at),
|
||||
};
|
||||
PollAt::Time(t)
|
||||
}
|
||||
|
||||
pub(crate) fn process(&mut self, now: Instant, ethernet_addr: EthernetAddress, ip_repr: &Ipv4Repr, repr: &UdpRepr, payload: &[u8]) -> Result<()> {
|
||||
let src_ip = ip_repr.src_addr;
|
||||
|
||||
// This is enforced in interface.rs.
|
||||
assert!(repr.src_port == DHCP_SERVER_PORT && repr.dst_port == DHCP_CLIENT_PORT);
|
||||
|
||||
let dhcp_packet = match DhcpPacket::new_checked(payload) {
|
||||
Ok(dhcp_packet) => dhcp_packet,
|
||||
Err(e) => {
|
||||
net_debug!("DHCP invalid pkt from {}: {:?}", src_ip, e);
|
||||
return Ok(());
|
||||
}
|
||||
};
|
||||
let dhcp_repr = match DhcpRepr::parse(&dhcp_packet) {
|
||||
Ok(dhcp_repr) => dhcp_repr,
|
||||
Err(e) => {
|
||||
net_debug!("DHCP error parsing pkt from {}: {:?}", src_ip, e);
|
||||
return Ok(());
|
||||
}
|
||||
};
|
||||
if dhcp_repr.client_hardware_address != ethernet_addr { return Ok(()) }
|
||||
if dhcp_repr.transaction_id != self.transaction_id { return Ok(()) }
|
||||
let server_identifier = match dhcp_repr.server_identifier {
|
||||
Some(server_identifier) => server_identifier,
|
||||
None => {
|
||||
net_debug!("DHCP ignoring {:?} because missing server_identifier", dhcp_repr.message_type);
|
||||
return Ok(());
|
||||
}
|
||||
};
|
||||
|
||||
net_debug!("DHCP recv {:?} from {} ({})", dhcp_repr.message_type, src_ip, server_identifier);
|
||||
|
||||
match (&mut self.state, dhcp_repr.message_type){
|
||||
(ClientState::Discovering(_state), DhcpMessageType::Offer) => {
|
||||
if !dhcp_repr.your_ip.is_unicast() {
|
||||
net_debug!("DHCP ignoring OFFER because your_ip is not unicast");
|
||||
return Ok(())
|
||||
}
|
||||
|
||||
self.state = ClientState::Requesting(RequestState {
|
||||
retry_at: now,
|
||||
retry: 0,
|
||||
server: ServerInfo {
|
||||
address: src_ip,
|
||||
identifier: server_identifier,
|
||||
},
|
||||
requested_ip: dhcp_repr.your_ip // use the offered ip
|
||||
});
|
||||
}
|
||||
(ClientState::Requesting(state), DhcpMessageType::Ack) => {
|
||||
if let Some((config, renew_at, expires_at)) = Self::parse_ack(now, &dhcp_repr, self.max_lease_duration) {
|
||||
self.config_changed = true;
|
||||
self.state = ClientState::Renewing(RenewState{
|
||||
server: state.server,
|
||||
config,
|
||||
renew_at,
|
||||
expires_at,
|
||||
});
|
||||
}
|
||||
}
|
||||
(ClientState::Requesting(_), DhcpMessageType::Nak) => {
|
||||
self.reset();
|
||||
}
|
||||
(ClientState::Renewing(state), DhcpMessageType::Ack) => {
|
||||
if let Some((config, renew_at, expires_at)) = Self::parse_ack(now, &dhcp_repr, self.max_lease_duration) {
|
||||
state.renew_at = renew_at;
|
||||
state.expires_at = expires_at;
|
||||
if state.config != config {
|
||||
self.config_changed = true;
|
||||
state.config = config;
|
||||
}
|
||||
}
|
||||
}
|
||||
(ClientState::Renewing(_), DhcpMessageType::Nak) => {
|
||||
self.reset();
|
||||
}
|
||||
_ => {
|
||||
net_debug!("DHCP ignoring {:?}: unexpected in current state", dhcp_repr.message_type);
|
||||
}
|
||||
}
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn parse_ack(now: Instant, dhcp_repr: &DhcpRepr, max_lease_duration: Option<Duration>) -> Option<(Config, Instant, Instant)> {
|
||||
let subnet_mask = match dhcp_repr.subnet_mask {
|
||||
Some(subnet_mask) => subnet_mask,
|
||||
None => {
|
||||
net_debug!("DHCP ignoring ACK because missing subnet_mask");
|
||||
return None
|
||||
}
|
||||
};
|
||||
|
||||
let prefix_len = match IpAddress::Ipv4(subnet_mask).to_prefix_len() {
|
||||
Some(prefix_len) => prefix_len,
|
||||
None => {
|
||||
net_debug!("DHCP ignoring ACK because subnet_mask is not a valid mask");
|
||||
return None
|
||||
}
|
||||
};
|
||||
|
||||
if !dhcp_repr.your_ip.is_unicast() {
|
||||
net_debug!("DHCP ignoring ACK because your_ip is not unicast");
|
||||
return None
|
||||
}
|
||||
|
||||
let mut lease_duration = dhcp_repr.lease_duration.map(|d| Duration::from_secs(d as _)).unwrap_or(DEFAULT_LEASE_DURATION);
|
||||
if let Some(max_lease_duration) = max_lease_duration {
|
||||
lease_duration = lease_duration.min(max_lease_duration);
|
||||
}
|
||||
|
||||
// Cleanup the DNS servers list, keeping only unicasts/
|
||||
// TP-Link TD-W8970 sends 0.0.0.0 as second DNS server if there's only one configured :(
|
||||
let mut dns_servers = [None; DHCP_MAX_DNS_SERVER_COUNT];
|
||||
if let Some(received) = dhcp_repr.dns_servers {
|
||||
let mut i = 0;
|
||||
for addr in received.iter() {
|
||||
if let Some(addr) = addr{
|
||||
if addr.is_unicast() {
|
||||
// This can never be out-of-bounds since both arrays have length DHCP_MAX_DNS_SERVER_COUNT
|
||||
dns_servers[i] = Some(*addr);
|
||||
i += 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
let config = Config{
|
||||
address: Ipv4Cidr::new(dhcp_repr.your_ip, prefix_len),
|
||||
router: dhcp_repr.router,
|
||||
dns_servers: dns_servers
|
||||
};
|
||||
|
||||
// RFC 2131 indicates clients should renew a lease halfway through its expiration.
|
||||
let renew_at = now + lease_duration / 2;
|
||||
let expires_at = now + lease_duration;
|
||||
|
||||
Some((config, renew_at, expires_at))
|
||||
}
|
||||
|
||||
pub(crate) fn dispatch<F>(&mut self, now: Instant, ethernet_addr: EthernetAddress, ip_mtu: usize, emit: F) -> Result<()>
|
||||
where F: FnOnce((Ipv4Repr, UdpRepr, DhcpRepr)) -> Result<()> {
|
||||
|
||||
// Worst case biggest IPv4 header length.
|
||||
// 0x0f * 4 = 60 bytes.
|
||||
const MAX_IPV4_HEADER_LEN: usize = 60;
|
||||
|
||||
// We don't directly increment transaction_id because sending the packet
|
||||
// may fail. We only want to update state after succesfully sending.
|
||||
let next_transaction_id = self.transaction_id + 1;
|
||||
|
||||
let mut dhcp_repr = DhcpRepr {
|
||||
message_type: DhcpMessageType::Discover,
|
||||
transaction_id: next_transaction_id,
|
||||
client_hardware_address: ethernet_addr,
|
||||
client_ip: Ipv4Address::UNSPECIFIED,
|
||||
your_ip: Ipv4Address::UNSPECIFIED,
|
||||
server_ip: Ipv4Address::UNSPECIFIED,
|
||||
router: None,
|
||||
subnet_mask: None,
|
||||
relay_agent_ip: Ipv4Address::UNSPECIFIED,
|
||||
broadcast: true,
|
||||
requested_ip: None,
|
||||
client_identifier: Some(ethernet_addr),
|
||||
server_identifier: None,
|
||||
parameter_request_list: Some(PARAMETER_REQUEST_LIST),
|
||||
max_size: Some((ip_mtu - MAX_IPV4_HEADER_LEN - UDP_HEADER_LEN) as u16),
|
||||
lease_duration: None,
|
||||
dns_servers: None,
|
||||
};
|
||||
|
||||
let udp_repr = UdpRepr {
|
||||
src_port: DHCP_CLIENT_PORT,
|
||||
dst_port: DHCP_SERVER_PORT,
|
||||
};
|
||||
|
||||
let mut ipv4_repr = Ipv4Repr {
|
||||
src_addr: Ipv4Address::UNSPECIFIED,
|
||||
dst_addr: Ipv4Address::BROADCAST,
|
||||
protocol: IpProtocol::Udp,
|
||||
payload_len: 0, // filled right before emit
|
||||
hop_limit: 64,
|
||||
};
|
||||
|
||||
match &mut self.state {
|
||||
ClientState::Discovering(state) => {
|
||||
if now < state.retry_at {
|
||||
return Err(Error::Exhausted)
|
||||
}
|
||||
|
||||
// send packet
|
||||
net_debug!("DHCP send DISCOVER to {}: {:?}", ipv4_repr.dst_addr, dhcp_repr);
|
||||
ipv4_repr.payload_len = udp_repr.header_len() + dhcp_repr.buffer_len();
|
||||
emit((ipv4_repr, udp_repr, dhcp_repr))?;
|
||||
|
||||
// Update state AFTER the packet has been successfully sent.
|
||||
state.retry_at = now + DISCOVER_TIMEOUT;
|
||||
self.transaction_id = next_transaction_id;
|
||||
Ok(())
|
||||
}
|
||||
ClientState::Requesting(state) => {
|
||||
if now < state.retry_at {
|
||||
return Err(Error::Exhausted)
|
||||
}
|
||||
|
||||
if state.retry >= REQUEST_RETRIES {
|
||||
net_debug!("DHCP request retries exceeded, restarting discovery");
|
||||
self.reset();
|
||||
// return Ok so we get polled again
|
||||
return Ok(())
|
||||
}
|
||||
|
||||
dhcp_repr.message_type = DhcpMessageType::Request;
|
||||
dhcp_repr.broadcast = false;
|
||||
dhcp_repr.requested_ip = Some(state.requested_ip);
|
||||
dhcp_repr.server_identifier = Some(state.server.identifier);
|
||||
|
||||
net_debug!("DHCP send request to {}: {:?}", ipv4_repr.dst_addr, dhcp_repr);
|
||||
ipv4_repr.payload_len = udp_repr.header_len() + dhcp_repr.buffer_len();
|
||||
emit((ipv4_repr, udp_repr, dhcp_repr))?;
|
||||
|
||||
// Exponential backoff: Double every 2 retries.
|
||||
state.retry_at = now + (REQUEST_TIMEOUT << (state.retry as u32 / 2));
|
||||
state.retry += 1;
|
||||
|
||||
self.transaction_id = next_transaction_id;
|
||||
Ok(())
|
||||
}
|
||||
ClientState::Renewing(state) => {
|
||||
if state.expires_at <= now {
|
||||
net_debug!("DHCP lease expired");
|
||||
self.reset();
|
||||
// return Ok so we get polled again
|
||||
return Ok(())
|
||||
}
|
||||
|
||||
if now < state.renew_at {
|
||||
return Err(Error::Exhausted)
|
||||
}
|
||||
|
||||
ipv4_repr.src_addr = state.config.address.address();
|
||||
ipv4_repr.dst_addr = state.server.address;
|
||||
dhcp_repr.message_type = DhcpMessageType::Request;
|
||||
dhcp_repr.client_ip = state.config.address.address();
|
||||
dhcp_repr.broadcast = false;
|
||||
|
||||
net_debug!("DHCP send renew to {}: {:?}", ipv4_repr.dst_addr, dhcp_repr);
|
||||
ipv4_repr.payload_len = udp_repr.header_len() + dhcp_repr.buffer_len();
|
||||
emit((ipv4_repr, udp_repr, dhcp_repr))?;
|
||||
|
||||
// In both RENEWING and REBINDING states, if the client receives no
|
||||
// response to its DHCPREQUEST message, the client SHOULD wait one-half
|
||||
// of the remaining time until T2 (in RENEWING state) and one-half of
|
||||
// the remaining lease time (in REBINDING state), down to a minimum of
|
||||
// 60 seconds, before retransmitting the DHCPREQUEST message.
|
||||
state.renew_at = now + MIN_RENEW_TIMEOUT.max((state.expires_at - now) / 2);
|
||||
|
||||
self.transaction_id = next_transaction_id;
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Reset state and restart discovery phase.
|
||||
///
|
||||
/// Use this to speed up acquisition of an address in a new
|
||||
/// network if a link was down and it is now back up.
|
||||
pub fn reset(&mut self) {
|
||||
net_trace!("DHCP reset");
|
||||
if let ClientState::Renewing(_) = &self.state {
|
||||
self.config_changed = true;
|
||||
}
|
||||
self.state = ClientState::Discovering(DiscoverState{
|
||||
retry_at: Instant::from_millis(0),
|
||||
});
|
||||
}
|
||||
|
||||
/// Query the socket for configuration changes.
|
||||
///
|
||||
/// The socket has an internal "configuration changed" flag. If
|
||||
/// set, this function returns the configuration and resets the flag.
|
||||
pub fn poll(&mut self) -> Option<Event<'_>> {
|
||||
if !self.config_changed {
|
||||
None
|
||||
} else if let ClientState::Renewing(state) = &self.state {
|
||||
self.config_changed = false;
|
||||
Some(Event::Configured(&state.config))
|
||||
} else {
|
||||
self.config_changed = false;
|
||||
Some(Event::Deconfigured)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<'a> Into<Socket<'a>> for Dhcpv4Socket {
|
||||
fn into(self) -> Socket<'a> {
|
||||
Socket::Dhcpv4(self)
|
||||
}
|
||||
}
|
|
@ -94,12 +94,12 @@ impl<'a> IcmpSocket<'a> {
|
|||
///
|
||||
/// The waker is woken on state changes that might affect the return value
|
||||
/// of `recv` method calls, such as receiving data, or the socket closing.
|
||||
///
|
||||
///
|
||||
/// Notes:
|
||||
///
|
||||
/// - Only one waker can be registered at a time. If another waker was previously registered,
|
||||
/// it is overwritten and will no longer be woken.
|
||||
/// - The Waker is woken only once. Once woken, you must register it again to receive more wakes.
|
||||
/// - The Waker is woken only once. Once woken, you must register it again to receive more wakes.
|
||||
/// - "Spurious wakes" are allowed: a wake doesn't guarantee the result of `recv` has
|
||||
/// necessarily changed.
|
||||
#[cfg(feature = "async")]
|
||||
|
@ -112,12 +112,12 @@ impl<'a> IcmpSocket<'a> {
|
|||
/// The waker is woken on state changes that might affect the return value
|
||||
/// of `send` method calls, such as space becoming available in the transmit
|
||||
/// buffer, or the socket closing.
|
||||
///
|
||||
///
|
||||
/// Notes:
|
||||
///
|
||||
/// - Only one waker can be registered at a time. If another waker was previously registered,
|
||||
/// it is overwritten and will no longer be woken.
|
||||
/// - The Waker is woken only once. Once woken, you must register it again to receive more wakes.
|
||||
/// - The Waker is woken only once. Once woken, you must register it again to receive more wakes.
|
||||
/// - "Spurious wakes" are allowed: a wake doesn't guarantee the result of `send` has
|
||||
/// necessarily changed.
|
||||
#[cfg(feature = "async")]
|
||||
|
@ -440,7 +440,7 @@ impl<'a> IcmpSocket<'a> {
|
|||
_ => Err(Error::Unaddressable)
|
||||
}
|
||||
})?;
|
||||
|
||||
|
||||
#[cfg(feature = "async")]
|
||||
self.tx_waker.wake();
|
||||
|
||||
|
@ -482,8 +482,9 @@ mod tests_common {
|
|||
pub static UDP_REPR: UdpRepr = UdpRepr {
|
||||
src_port: 53,
|
||||
dst_port: 9090,
|
||||
payload: &[0xff; 10]
|
||||
};
|
||||
|
||||
pub static UDP_PAYLOAD: &[u8] = &[0xff; 10];
|
||||
}
|
||||
|
||||
#[cfg(all(test, feature = "proto-ipv4"))]
|
||||
|
@ -644,7 +645,13 @@ mod test_ipv4 {
|
|||
|
||||
let mut bytes = [0xff; 18];
|
||||
let mut packet = UdpPacket::new_unchecked(&mut bytes);
|
||||
UDP_REPR.emit(&mut packet, &REMOTE_IPV4.into(), &LOCAL_IPV4.into(), &checksum);
|
||||
UDP_REPR.emit(
|
||||
&mut packet,
|
||||
&REMOTE_IPV4.into(),
|
||||
&LOCAL_IPV4.into(),
|
||||
UDP_PAYLOAD.len(),
|
||||
|buf| buf.copy_from_slice(UDP_PAYLOAD),
|
||||
&checksum);
|
||||
|
||||
let data = &packet.into_inner()[..];
|
||||
|
||||
|
@ -843,7 +850,13 @@ mod test_ipv6 {
|
|||
|
||||
let mut bytes = [0xff; 18];
|
||||
let mut packet = UdpPacket::new_unchecked(&mut bytes);
|
||||
UDP_REPR.emit(&mut packet, &REMOTE_IPV6.into(), &LOCAL_IPV6.into(), &checksum);
|
||||
UDP_REPR.emit(
|
||||
&mut packet,
|
||||
&REMOTE_IPV6.into(),
|
||||
&LOCAL_IPV6.into(),
|
||||
UDP_PAYLOAD.len(),
|
||||
|buf| buf.copy_from_slice(UDP_PAYLOAD),
|
||||
&checksum);
|
||||
|
||||
let data = &packet.into_inner()[..];
|
||||
|
||||
|
|
|
@ -22,6 +22,8 @@ mod icmp;
|
|||
mod udp;
|
||||
#[cfg(feature = "socket-tcp")]
|
||||
mod tcp;
|
||||
#[cfg(feature = "socket-dhcpv4")]
|
||||
mod dhcpv4;
|
||||
mod set;
|
||||
mod ref_;
|
||||
|
||||
|
@ -53,6 +55,9 @@ pub use self::tcp::{SocketBuffer as TcpSocketBuffer,
|
|||
State as TcpState,
|
||||
TcpSocket};
|
||||
|
||||
#[cfg(feature = "socket-dhcpv4")]
|
||||
pub use self::dhcpv4::{Dhcpv4Socket, Config as Dhcpv4Config, Event as Dhcpv4Event};
|
||||
|
||||
pub use self::set::{Set as SocketSet, Item as SocketSetItem, Handle as SocketHandle};
|
||||
pub use self::set::{Iter as SocketSetIter, IterMut as SocketSetIterMut};
|
||||
|
||||
|
@ -91,6 +96,8 @@ pub enum Socket<'a> {
|
|||
Udp(UdpSocket<'a>),
|
||||
#[cfg(feature = "socket-tcp")]
|
||||
Tcp(TcpSocket<'a>),
|
||||
#[cfg(feature = "socket-dhcpv4")]
|
||||
Dhcpv4(Dhcpv4Socket),
|
||||
}
|
||||
|
||||
macro_rules! dispatch_socket {
|
||||
|
@ -110,6 +117,8 @@ macro_rules! dispatch_socket {
|
|||
&$( $mut_ )* Socket::Udp(ref $( $mut_ )* $socket) => $code,
|
||||
#[cfg(feature = "socket-tcp")]
|
||||
&$( $mut_ )* Socket::Tcp(ref $( $mut_ )* $socket) => $code,
|
||||
#[cfg(feature = "socket-dhcpv4")]
|
||||
&$( $mut_ )* Socket::Dhcpv4(ref $( $mut_ )* $socket) => $code,
|
||||
}
|
||||
};
|
||||
}
|
||||
|
@ -169,3 +178,5 @@ from_socket!(IcmpSocket<'a>, Icmp);
|
|||
from_socket!(UdpSocket<'a>, Udp);
|
||||
#[cfg(feature = "socket-tcp")]
|
||||
from_socket!(TcpSocket<'a>, Tcp);
|
||||
#[cfg(feature = "socket-dhcpv4")]
|
||||
from_socket!(Dhcpv4Socket, Dhcpv4);
|
||||
|
|
|
@ -1,13 +1,5 @@
|
|||
use core::ops::{Deref, DerefMut};
|
||||
|
||||
#[cfg(feature = "socket-raw")]
|
||||
use crate::socket::RawSocket;
|
||||
#[cfg(all(feature = "socket-icmp", any(feature = "proto-ipv4", feature = "proto-ipv6")))]
|
||||
use crate::socket::IcmpSocket;
|
||||
#[cfg(feature = "socket-udp")]
|
||||
use crate::socket::UdpSocket;
|
||||
#[cfg(feature = "socket-tcp")]
|
||||
use crate::socket::TcpSocket;
|
||||
|
||||
/// A trait for tracking a socket usage session.
|
||||
///
|
||||
|
@ -20,13 +12,15 @@ pub trait Session {
|
|||
}
|
||||
|
||||
#[cfg(feature = "socket-raw")]
|
||||
impl<'a> Session for RawSocket<'a> {}
|
||||
impl<'a> Session for crate::socket::RawSocket<'a> {}
|
||||
#[cfg(all(feature = "socket-icmp", any(feature = "proto-ipv4", feature = "proto-ipv6")))]
|
||||
impl<'a> Session for IcmpSocket<'a> {}
|
||||
impl<'a> Session for crate::socket::IcmpSocket<'a> {}
|
||||
#[cfg(feature = "socket-udp")]
|
||||
impl<'a> Session for UdpSocket<'a> {}
|
||||
impl<'a> Session for crate::socket::UdpSocket<'a> {}
|
||||
#[cfg(feature = "socket-tcp")]
|
||||
impl<'a> Session for TcpSocket<'a> {}
|
||||
impl<'a> Session for crate::socket::TcpSocket<'a> {}
|
||||
#[cfg(feature = "socket-dhcpv4")]
|
||||
impl Session for crate::socket::Dhcpv4Socket {}
|
||||
|
||||
/// A smart pointer to a socket.
|
||||
///
|
||||
|
|
|
@ -156,6 +156,9 @@ impl<'a> Set<'a> {
|
|||
} else {
|
||||
socket.close()
|
||||
},
|
||||
#[cfg(feature = "socket-dhcpv4")]
|
||||
Socket::Dhcpv4(_) =>
|
||||
may_remove = true,
|
||||
}
|
||||
}
|
||||
if may_remove {
|
||||
|
|
|
@ -54,12 +54,12 @@ impl<'a> UdpSocket<'a> {
|
|||
///
|
||||
/// The waker is woken on state changes that might affect the return value
|
||||
/// of `recv` method calls, such as receiving data, or the socket closing.
|
||||
///
|
||||
///
|
||||
/// Notes:
|
||||
///
|
||||
/// - Only one waker can be registered at a time. If another waker was previously registered,
|
||||
/// it is overwritten and will no longer be woken.
|
||||
/// - The Waker is woken only once. Once woken, you must register it again to receive more wakes.
|
||||
/// - The Waker is woken only once. Once woken, you must register it again to receive more wakes.
|
||||
/// - "Spurious wakes" are allowed: a wake doesn't guarantee the result of `recv` has
|
||||
/// necessarily changed.
|
||||
#[cfg(feature = "async")]
|
||||
|
@ -72,12 +72,12 @@ impl<'a> UdpSocket<'a> {
|
|||
/// The waker is woken on state changes that might affect the return value
|
||||
/// of `send` method calls, such as space becoming available in the transmit
|
||||
/// buffer, or the socket closing.
|
||||
///
|
||||
///
|
||||
/// Notes:
|
||||
///
|
||||
/// - Only one waker can be registered at a time. If another waker was previously registered,
|
||||
/// it is overwritten and will no longer be woken.
|
||||
/// - The Waker is woken only once. Once woken, you must register it again to receive more wakes.
|
||||
/// - The Waker is woken only once. Once woken, you must register it again to receive more wakes.
|
||||
/// - "Spurious wakes" are allowed: a wake doesn't guarantee the result of `send` has
|
||||
/// necessarily changed.
|
||||
#[cfg(feature = "async")]
|
||||
|
@ -277,13 +277,13 @@ impl<'a> UdpSocket<'a> {
|
|||
true
|
||||
}
|
||||
|
||||
pub(crate) fn process(&mut self, ip_repr: &IpRepr, repr: &UdpRepr) -> Result<()> {
|
||||
pub(crate) fn process(&mut self, ip_repr: &IpRepr, repr: &UdpRepr, payload: &[u8]) -> Result<()> {
|
||||
debug_assert!(self.accepts(ip_repr, repr));
|
||||
|
||||
let size = repr.payload.len();
|
||||
let size = payload.len();
|
||||
|
||||
let endpoint = IpEndpoint { addr: ip_repr.src_addr(), port: repr.src_port };
|
||||
self.rx_buffer.enqueue(size, endpoint)?.copy_from_slice(repr.payload);
|
||||
self.rx_buffer.enqueue(size, endpoint)?.copy_from_slice(payload);
|
||||
|
||||
net_trace!("{}:{}:{}: receiving {} octets",
|
||||
self.meta.handle, self.endpoint,
|
||||
|
@ -296,7 +296,7 @@ impl<'a> UdpSocket<'a> {
|
|||
}
|
||||
|
||||
pub(crate) fn dispatch<F>(&mut self, emit: F) -> Result<()>
|
||||
where F: FnOnce((IpRepr, UdpRepr)) -> Result<()> {
|
||||
where F: FnOnce((IpRepr, UdpRepr, &[u8])) -> Result<()> {
|
||||
let handle = self.handle();
|
||||
let endpoint = self.endpoint;
|
||||
let hop_limit = self.hop_limit.unwrap_or(64);
|
||||
|
@ -309,16 +309,15 @@ impl<'a> UdpSocket<'a> {
|
|||
let repr = UdpRepr {
|
||||
src_port: endpoint.port,
|
||||
dst_port: remote_endpoint.port,
|
||||
payload: payload_buf,
|
||||
};
|
||||
let ip_repr = IpRepr::Unspecified {
|
||||
src_addr: endpoint.addr,
|
||||
dst_addr: remote_endpoint.addr,
|
||||
protocol: IpProtocol::Udp,
|
||||
payload_len: repr.buffer_len(),
|
||||
payload_len: repr.header_len() + payload_buf.len(),
|
||||
hop_limit: hop_limit,
|
||||
};
|
||||
emit((ip_repr, repr))
|
||||
emit((ip_repr, repr, payload_buf))
|
||||
})?;
|
||||
|
||||
#[cfg(feature = "async")]
|
||||
|
@ -379,15 +378,15 @@ mod test {
|
|||
const LOCAL_UDP_REPR: UdpRepr = UdpRepr {
|
||||
src_port: LOCAL_PORT,
|
||||
dst_port: REMOTE_PORT,
|
||||
payload: b"abcdef"
|
||||
};
|
||||
|
||||
const REMOTE_UDP_REPR: UdpRepr = UdpRepr {
|
||||
src_port: REMOTE_PORT,
|
||||
dst_port: LOCAL_PORT,
|
||||
payload: b"abcdef"
|
||||
};
|
||||
|
||||
const PAYLOAD: &[u8] = b"abcdef";
|
||||
|
||||
fn remote_ip_repr() -> IpRepr {
|
||||
match (MOCK_IP_ADDR_2, MOCK_IP_ADDR_1) {
|
||||
#[cfg(feature = "proto-ipv4")]
|
||||
|
@ -457,16 +456,18 @@ mod test {
|
|||
assert_eq!(socket.send_slice(b"123456", REMOTE_END), Err(Error::Exhausted));
|
||||
assert!(!socket.can_send());
|
||||
|
||||
assert_eq!(socket.dispatch(|(ip_repr, udp_repr)| {
|
||||
assert_eq!(socket.dispatch(|(ip_repr, udp_repr, payload)| {
|
||||
assert_eq!(ip_repr, LOCAL_IP_REPR);
|
||||
assert_eq!(udp_repr, LOCAL_UDP_REPR);
|
||||
assert_eq!(payload, PAYLOAD);
|
||||
Err(Error::Unaddressable)
|
||||
}), Err(Error::Unaddressable));
|
||||
assert!(!socket.can_send());
|
||||
|
||||
assert_eq!(socket.dispatch(|(ip_repr, udp_repr)| {
|
||||
assert_eq!(socket.dispatch(|(ip_repr, udp_repr, payload)| {
|
||||
assert_eq!(ip_repr, LOCAL_IP_REPR);
|
||||
assert_eq!(udp_repr, LOCAL_UDP_REPR);
|
||||
assert_eq!(payload, PAYLOAD);
|
||||
Ok(())
|
||||
}), Ok(()));
|
||||
assert!(socket.can_send());
|
||||
|
@ -481,12 +482,12 @@ mod test {
|
|||
assert_eq!(socket.recv(), Err(Error::Exhausted));
|
||||
|
||||
assert!(socket.accepts(&remote_ip_repr(), &REMOTE_UDP_REPR));
|
||||
assert_eq!(socket.process(&remote_ip_repr(), &REMOTE_UDP_REPR),
|
||||
assert_eq!(socket.process(&remote_ip_repr(), &REMOTE_UDP_REPR, PAYLOAD),
|
||||
Ok(()));
|
||||
assert!(socket.can_recv());
|
||||
|
||||
assert!(socket.accepts(&remote_ip_repr(), &REMOTE_UDP_REPR));
|
||||
assert_eq!(socket.process(&remote_ip_repr(), &REMOTE_UDP_REPR),
|
||||
assert_eq!(socket.process(&remote_ip_repr(), &REMOTE_UDP_REPR, PAYLOAD),
|
||||
Err(Error::Exhausted));
|
||||
assert_eq!(socket.recv(), Ok((&b"abcdef"[..], REMOTE_END)));
|
||||
assert!(!socket.can_recv());
|
||||
|
@ -499,7 +500,7 @@ mod test {
|
|||
|
||||
assert_eq!(socket.peek(), Err(Error::Exhausted));
|
||||
|
||||
assert_eq!(socket.process(&remote_ip_repr(), &REMOTE_UDP_REPR),
|
||||
assert_eq!(socket.process(&remote_ip_repr(), &REMOTE_UDP_REPR, PAYLOAD),
|
||||
Ok(()));
|
||||
assert_eq!(socket.peek(), Ok((&b"abcdef"[..], &REMOTE_END)));
|
||||
assert_eq!(socket.recv(), Ok((&b"abcdef"[..], REMOTE_END)));
|
||||
|
@ -512,7 +513,7 @@ mod test {
|
|||
assert_eq!(socket.bind(LOCAL_PORT), Ok(()));
|
||||
|
||||
assert!(socket.accepts(&remote_ip_repr(), &REMOTE_UDP_REPR));
|
||||
assert_eq!(socket.process(&remote_ip_repr(), &REMOTE_UDP_REPR),
|
||||
assert_eq!(socket.process(&remote_ip_repr(), &REMOTE_UDP_REPR, PAYLOAD),
|
||||
Ok(()));
|
||||
|
||||
let mut slice = [0; 4];
|
||||
|
@ -525,7 +526,7 @@ mod test {
|
|||
let mut socket = socket(buffer(1), buffer(0));
|
||||
assert_eq!(socket.bind(LOCAL_PORT), Ok(()));
|
||||
|
||||
assert_eq!(socket.process(&remote_ip_repr(), &REMOTE_UDP_REPR),
|
||||
assert_eq!(socket.process(&remote_ip_repr(), &REMOTE_UDP_REPR, PAYLOAD),
|
||||
Ok(()));
|
||||
|
||||
let mut slice = [0; 4];
|
||||
|
@ -543,7 +544,7 @@ mod test {
|
|||
|
||||
s.set_hop_limit(Some(0x2a));
|
||||
assert_eq!(s.send_slice(b"abcdef", REMOTE_END), Ok(()));
|
||||
assert_eq!(s.dispatch(|(ip_repr, _)| {
|
||||
assert_eq!(s.dispatch(|(ip_repr, _, _)| {
|
||||
assert_eq!(ip_repr, IpRepr::Unspecified{
|
||||
src_addr: MOCK_IP_ADDR_1,
|
||||
dst_addr: MOCK_IP_ADDR_2,
|
||||
|
@ -619,9 +620,8 @@ mod test {
|
|||
let repr = UdpRepr {
|
||||
src_port: REMOTE_PORT,
|
||||
dst_port: LOCAL_PORT,
|
||||
payload: &[]
|
||||
};
|
||||
assert_eq!(socket.process(&remote_ip_repr(), &repr), Ok(()));
|
||||
assert_eq!(socket.process(&remote_ip_repr(), &repr, &[]), Ok(()));
|
||||
assert_eq!(socket.recv(), Ok((&[][..], REMOTE_END)));
|
||||
}
|
||||
}
|
||||
|
|
28
src/time.rs
28
src/time.rs
|
@ -232,6 +232,34 @@ impl ops::DivAssign<u32> for Duration {
|
|||
}
|
||||
}
|
||||
|
||||
impl ops::Shl<u32> for Duration {
|
||||
type Output = Duration;
|
||||
|
||||
fn shl(self, rhs: u32) -> Duration {
|
||||
Duration::from_millis(self.millis << rhs)
|
||||
}
|
||||
}
|
||||
|
||||
impl ops::ShlAssign<u32> for Duration {
|
||||
fn shl_assign(&mut self, rhs: u32) {
|
||||
self.millis <<= rhs;
|
||||
}
|
||||
}
|
||||
|
||||
impl ops::Shr<u32> for Duration {
|
||||
type Output = Duration;
|
||||
|
||||
fn shr(self, rhs: u32) -> Duration {
|
||||
Duration::from_millis(self.millis >> rhs)
|
||||
}
|
||||
}
|
||||
|
||||
impl ops::ShrAssign<u32> for Duration {
|
||||
fn shr_assign(&mut self, rhs: u32) {
|
||||
self.millis >>= rhs;
|
||||
}
|
||||
}
|
||||
|
||||
impl From<::core::time::Duration> for Duration {
|
||||
fn from(other: ::core::time::Duration) -> Duration {
|
||||
Duration::from_millis(
|
||||
|
|
|
@ -6,6 +6,10 @@ use crate::{Error, Result};
|
|||
use crate::wire::{EthernetAddress, Ipv4Address};
|
||||
use crate::wire::arp::Hardware;
|
||||
|
||||
pub const SERVER_PORT: u16 = 67;
|
||||
pub const CLIENT_PORT: u16 = 68;
|
||||
pub const MAX_DNS_SERVER_COUNT: usize = 3;
|
||||
|
||||
const DHCP_MAGIC_NUMBER: u32 = 0x63825363;
|
||||
|
||||
enum_with_unknown! {
|
||||
|
@ -683,7 +687,7 @@ pub struct Repr<'a> {
|
|||
/// the client is interested in.
|
||||
pub parameter_request_list: Option<&'a [u8]>,
|
||||
/// DNS servers
|
||||
pub dns_servers: Option<[Option<Ipv4Address>; 3]>,
|
||||
pub dns_servers: Option<[Option<Ipv4Address>; MAX_DNS_SERVER_COUNT]>,
|
||||
/// The maximum size dhcp packet the interface can receive
|
||||
pub max_size: Option<u16>,
|
||||
/// The DHCP IP lease duration, specified in seconds.
|
||||
|
@ -777,7 +781,7 @@ impl<'a> Repr<'a> {
|
|||
parameter_request_list = Some(data);
|
||||
}
|
||||
DhcpOption::Other {kind: field::OPT_DOMAIN_NAME_SERVER, data} => {
|
||||
let mut servers = [None; 3];
|
||||
let mut servers = [None; MAX_DNS_SERVER_COUNT];
|
||||
for (server, chunk) in servers.iter_mut().zip(data.chunks(4)) {
|
||||
*server = Some(Ipv4Address::from_bytes(chunk));
|
||||
}
|
||||
|
|
|
@ -887,7 +887,7 @@ pub fn pretty_print_ip_payload<T: Into<Repr>>(f: &mut fmt::Formatter, indent: &m
|
|||
&repr.dst_addr(), &checksum_caps) {
|
||||
Err(err) => write!(f, "{}{} ({})", indent, udp_packet, err),
|
||||
Ok(udp_repr) => {
|
||||
write!(f, "{}{}", indent, udp_repr)?;
|
||||
write!(f, "{}{} len={}", indent, udp_repr, udp_packet.payload().len())?;
|
||||
let valid = udp_packet.verify_checksum(&repr.src_addr(),
|
||||
&repr.dst_addr());
|
||||
format_checksum(f, valid)
|
||||
|
|
|
@ -211,7 +211,8 @@ pub use self::mld::{AddressRecord as MldAddressRecord,
|
|||
Repr as MldRepr};
|
||||
|
||||
pub use self::udp::{Packet as UdpPacket,
|
||||
Repr as UdpRepr};
|
||||
Repr as UdpRepr,
|
||||
HEADER_LEN as UDP_HEADER_LEN};
|
||||
|
||||
pub use self::tcp::{SeqNumber as TcpSeqNumber,
|
||||
Packet as TcpPacket,
|
||||
|
@ -222,4 +223,7 @@ pub use self::tcp::{SeqNumber as TcpSeqNumber,
|
|||
#[cfg(feature = "proto-dhcpv4")]
|
||||
pub use self::dhcpv4::{Packet as DhcpPacket,
|
||||
Repr as DhcpRepr,
|
||||
MessageType as DhcpMessageType};
|
||||
MessageType as DhcpMessageType,
|
||||
CLIENT_PORT as DHCP_CLIENT_PORT,
|
||||
SERVER_PORT as DHCP_SERVER_PORT,
|
||||
MAX_DNS_SERVER_COUNT as DHCP_MAX_DNS_SERVER_COUNT};
|
||||
|
|
|
@ -28,6 +28,8 @@ mod field {
|
|||
}
|
||||
}
|
||||
|
||||
pub const HEADER_LEN: usize = field::CHECKSUM.end;
|
||||
|
||||
#[allow(clippy::len_without_is_empty)]
|
||||
impl<T: AsRef<[u8]>> Packet<T> {
|
||||
/// Imbue a raw octet buffer with UDP packet structure.
|
||||
|
@ -55,13 +57,13 @@ impl<T: AsRef<[u8]>> Packet<T> {
|
|||
/// [set_len]: #method.set_len
|
||||
pub fn check_len(&self) -> Result<()> {
|
||||
let buffer_len = self.buffer.as_ref().len();
|
||||
if buffer_len < field::CHECKSUM.end {
|
||||
if buffer_len < HEADER_LEN {
|
||||
Err(Error::Truncated)
|
||||
} else {
|
||||
let field_len = self.len() as usize;
|
||||
if buffer_len < field_len {
|
||||
Err(Error::Truncated)
|
||||
} else if field_len < field::CHECKSUM.end {
|
||||
} else if field_len < HEADER_LEN {
|
||||
Err(Error::Malformed)
|
||||
} else {
|
||||
Ok(())
|
||||
|
@ -201,16 +203,15 @@ impl<T: AsRef<[u8]>> AsRef<[u8]> for Packet<T> {
|
|||
/// A high-level representation of an User Datagram Protocol packet.
|
||||
#[derive(Debug, PartialEq, Eq, Clone, Copy)]
|
||||
#[cfg_attr(feature = "defmt", derive(defmt::Format))]
|
||||
pub struct Repr<'a> {
|
||||
pub struct Repr {
|
||||
pub src_port: u16,
|
||||
pub dst_port: u16,
|
||||
pub payload: &'a [u8]
|
||||
}
|
||||
|
||||
impl<'a> Repr<'a> {
|
||||
impl Repr {
|
||||
/// Parse an User Datagram Protocol packet and return a high-level representation.
|
||||
pub fn parse<T>(packet: &Packet<&'a T>, src_addr: &IpAddress, dst_addr: &IpAddress,
|
||||
checksum_caps: &ChecksumCapabilities) -> Result<Repr<'a>>
|
||||
pub fn parse<T>(packet: &Packet<&T>, src_addr: &IpAddress, dst_addr: &IpAddress,
|
||||
checksum_caps: &ChecksumCapabilities) -> Result<Repr>
|
||||
where T: AsRef<[u8]> + ?Sized {
|
||||
// Destination port cannot be omitted (but source port can be).
|
||||
if packet.dst_port() == 0 { return Err(Error::Malformed) }
|
||||
|
@ -230,25 +231,26 @@ impl<'a> Repr<'a> {
|
|||
Ok(Repr {
|
||||
src_port: packet.src_port(),
|
||||
dst_port: packet.dst_port(),
|
||||
payload: packet.payload()
|
||||
})
|
||||
}
|
||||
|
||||
/// Return the length of a packet that will be emitted from this high-level representation.
|
||||
pub fn buffer_len(&self) -> usize {
|
||||
field::CHECKSUM.end + self.payload.len()
|
||||
/// Return the length of the packet header that will be emitted from this high-level representation.
|
||||
pub fn header_len(&self) -> usize {
|
||||
HEADER_LEN
|
||||
}
|
||||
|
||||
/// Emit a high-level representation into an User Datagram Protocol packet.
|
||||
pub fn emit<T: ?Sized>(&self, packet: &mut Packet<&mut T>,
|
||||
src_addr: &IpAddress,
|
||||
dst_addr: &IpAddress,
|
||||
payload_len: usize,
|
||||
emit_payload: impl FnOnce(&mut [u8]),
|
||||
checksum_caps: &ChecksumCapabilities)
|
||||
where T: AsRef<[u8]> + AsMut<[u8]> {
|
||||
packet.set_src_port(self.src_port);
|
||||
packet.set_dst_port(self.dst_port);
|
||||
packet.set_len((field::CHECKSUM.end + self.payload.len()) as u16);
|
||||
packet.payload_mut().copy_from_slice(self.payload);
|
||||
packet.set_len((HEADER_LEN + payload_len) as u16);
|
||||
emit_payload(packet.payload_mut());
|
||||
|
||||
if checksum_caps.udp.tx() {
|
||||
packet.fill_checksum(src_addr, dst_addr)
|
||||
|
@ -268,10 +270,9 @@ impl<'a, T: AsRef<[u8]> + ?Sized> fmt::Display for Packet<&'a T> {
|
|||
}
|
||||
}
|
||||
|
||||
impl<'a> fmt::Display for Repr<'a> {
|
||||
impl fmt::Display for Repr {
|
||||
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
||||
write!(f, "UDP src={} dst={} len={}",
|
||||
self.src_port, self.dst_port, self.payload.len())
|
||||
write!(f, "UDP src={} dst={}", self.src_port, self.dst_port)
|
||||
}
|
||||
}
|
||||
|
||||
|
@ -361,11 +362,10 @@ mod test {
|
|||
}
|
||||
|
||||
#[cfg(feature = "proto-ipv4")]
|
||||
fn packet_repr() -> Repr<'static> {
|
||||
fn packet_repr() -> Repr {
|
||||
Repr {
|
||||
src_port: 48896,
|
||||
dst_port: 53,
|
||||
payload: &PAYLOAD_BYTES
|
||||
}
|
||||
}
|
||||
|
||||
|
@ -382,9 +382,11 @@ mod test {
|
|||
#[cfg(feature = "proto-ipv4")]
|
||||
fn test_emit() {
|
||||
let repr = packet_repr();
|
||||
let mut bytes = vec![0xa5; repr.buffer_len()];
|
||||
let mut bytes = vec![0xa5; repr.header_len() + PAYLOAD_BYTES.len()];
|
||||
let mut packet = Packet::new_unchecked(&mut bytes);
|
||||
repr.emit(&mut packet, &SRC_ADDR.into(), &DST_ADDR.into(),
|
||||
PAYLOAD_BYTES.len(),
|
||||
|payload| payload.copy_from_slice(&PAYLOAD_BYTES),
|
||||
&ChecksumCapabilities::default());
|
||||
assert_eq!(&packet.into_inner()[..], &PACKET_BYTES[..]);
|
||||
}
|
||||
|
|
Loading…
Reference in New Issue