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|
use crate::config::MULLVAD_INTERFACE_NAME;
use super::{
super::stats::{Stats, StatsMap},
Config, Error as WgKernelError, Handle, Tunnel, TunnelError,
};
use futures::Future;
use std::{collections::HashMap, pin::Pin};
use talpid_dbus::{
dbus,
network_manager::{
DeviceConfig, Error as NetworkManagerError, NetworkManager, Variant, VariantMap,
WireguardTunnel,
},
};
use talpid_net::unix::iface_index;
use talpid_tunnel_config_client::DaitaSettings;
#[derive(thiserror::Error, Debug)]
pub enum Error {
#[error("Error while communicating over Dbus")]
Dbus(#[from] dbus::Error),
#[error("NetworkManager error")]
NetworkManager(#[from] NetworkManagerError),
}
pub struct NetworkManagerTunnel {
network_manager: NetworkManager,
tunnel: Option<WireguardTunnel>,
netlink_connections: Handle,
interface_name: String,
}
impl NetworkManagerTunnel {
pub fn new(
tokio_handle: tokio::runtime::Handle,
config: &Config,
) -> std::result::Result<Self, WgKernelError> {
let network_manager = NetworkManager::new()
.map_err(Error::NetworkManager)
.map_err(WgKernelError::NetworkManager)?;
let config_map = convert_config_to_dbus(config);
let tunnel = network_manager
.create_wg_tunnel(&config_map)
.map_err(|err| WgKernelError::NetworkManager(err.into()))?;
let interface_name = match network_manager.get_interface_name(&tunnel) {
Ok(name) => name,
Err(error) => {
log::error!("Failed to fetch interface name from NM: {}", error);
MULLVAD_INTERFACE_NAME.to_string()
}
};
let netlink_connections = tokio_handle.block_on(Handle::connect())?;
Ok(NetworkManagerTunnel {
network_manager,
tunnel: Some(tunnel),
netlink_connections,
interface_name,
})
}
}
#[async_trait::async_trait]
impl Tunnel for NetworkManagerTunnel {
fn get_interface_name(&self) -> String {
self.interface_name.clone()
}
fn stop(mut self: Box<Self>) -> std::result::Result<(), TunnelError> {
if let Some(tunnel) = self.tunnel.take() {
if let Err(err) = self.network_manager.remove_tunnel(tunnel) {
log::error!("Failed to remove WireGuard tunnel via NM: {}", err);
Err(TunnelError::StopWireguardError(Box::new(err)))
} else {
Ok(())
}
} else {
Ok(())
}
}
async fn get_tunnel_stats(&self) -> std::result::Result<StatsMap, TunnelError> {
let mut wg = self.netlink_connections.wg_handle.clone();
let device = wg
.get_by_name(self.interface_name.clone())
.await
.map_err(|err| {
log::error!("Failed to fetch WireGuard device config: {}", err);
TunnelError::GetConfigError
})?;
Ok(Stats::parse_device_message(&device))
}
fn set_config(
&mut self,
config: Config,
daita: Option<DaitaSettings>,
) -> Pin<Box<dyn Future<Output = std::result::Result<(), TunnelError>> + Send>> {
let interface_name = self.interface_name.clone();
let mut wg = self.netlink_connections.wg_handle.clone();
Box::pin(async move {
if daita.is_some() {
// Outright fail to start - this tunnel type does not support DAITA.
return Err(TunnelError::DaitaNotSupported);
}
let index = iface_index(&interface_name).map_err(|err| {
log::error!("Failed to fetch WireGuard device index: {}", err);
TunnelError::SetConfigError
})?;
wg.set_config(index, &config).await.map_err(|err| {
log::error!("Failed to apply WireGuard config: {}", err);
TunnelError::SetConfigError
})
})
}
}
fn convert_config_to_dbus(config: &Config) -> DeviceConfig {
let mut ipv6_config: VariantMap = HashMap::new();
let mut ipv4_config: VariantMap = HashMap::new();
let mut wireguard_config: VariantMap = HashMap::new();
let mut connection_config: VariantMap = HashMap::new();
let mut peer_configs = vec![];
wireguard_config.insert("mtu".into(), Variant(Box::new(config.mtu as u32)));
if let Some(fwmark) = config.fwmark {
wireguard_config.insert("fwmark".into(), Variant(Box::new(fwmark)));
}
wireguard_config.insert("peer-routes".into(), Variant(Box::new(false)));
wireguard_config.insert(
"private-key".into(),
Variant(Box::new(config.tunnel.private_key.to_base64())),
);
wireguard_config.insert("private-key-flags".into(), Variant(Box::new(0x0u32)));
for peer in config.peers() {
let mut peer_config: VariantMap = HashMap::new();
let allowed_ips = peer
.allowed_ips
.iter()
.map(ToString::to_string)
.collect::<Vec<_>>();
peer_config.insert("allowed-ips".into(), Variant(Box::new(allowed_ips)));
peer_config.insert(
"endpoint".into(),
Variant(Box::new(peer.endpoint.to_string())),
);
peer_config.insert(
"public-key".into(),
Variant(Box::new(peer.public_key.to_base64())),
);
peer_configs.push(peer_config);
}
wireguard_config.insert("peers".into(), Variant(Box::new(peer_configs)));
connection_config.insert("type".into(), Variant(Box::new("wireguard".to_string())));
connection_config.insert(
"id".into(),
Variant(Box::new(MULLVAD_INTERFACE_NAME.to_string())),
);
connection_config.insert(
"interface-name".into(),
Variant(Box::new(MULLVAD_INTERFACE_NAME.to_string())),
);
connection_config.insert("autoconnect".into(), Variant(Box::new(true)));
let ipv4_addrs: Vec<_> = config
.tunnel
.addresses
.iter()
.filter(|ip| ip.is_ipv4())
.map(NetworkManager::convert_address_to_dbus)
.collect();
let ipv6_addrs: Vec<_> = config
.tunnel
.addresses
.iter()
.filter(|ip| ip.is_ipv6())
.map(NetworkManager::convert_address_to_dbus)
.collect();
ipv4_config.insert("address-data".into(), Variant(Box::new(ipv4_addrs)));
ipv4_config.insert("ignore-auto-routes".into(), Variant(Box::new(true)));
ipv4_config.insert("ignore-auto-dns".into(), Variant(Box::new(true)));
ipv4_config.insert("may-fail".into(), Variant(Box::new(true)));
ipv4_config.insert("method".into(), Variant(Box::new("manual".to_string())));
ipv4_config.insert("never-default".into(), Variant(Box::new(true)));
if !ipv6_addrs.is_empty() {
ipv6_config.insert("method".into(), Variant(Box::new("manual".to_string())));
ipv6_config.insert("address-data".into(), Variant(Box::new(ipv6_addrs)));
ipv6_config.insert("ignore-auto-routes".into(), Variant(Box::new(true)));
ipv6_config.insert("ignore-auto-dns".into(), Variant(Box::new(true)));
ipv6_config.insert("may-fail".into(), Variant(Box::new(true)));
}
let mut settings = HashMap::new();
settings.insert("ipv4".into(), ipv4_config);
if !ipv6_config.is_empty() {
settings.insert("ipv6".into(), ipv6_config);
}
settings.insert("wireguard".into(), wireguard_config);
settings.insert("connection".into(), connection_config);
settings
}
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