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use std::{ffi, io};
use tokio::sync::{mpsc, watch};
use tokio::task;
use rsdsl_ip_config::{Ipv4Config, Ipv6Config};
use thiserror::Error;
/// An external error that prevents a supervisor from functioning.
#[derive(Debug, Error)]
pub enum Error {
#[error("got no ipv4 address")]
NoIpv4Addr,
#[error("got no ipv4 primary dns")]
NoIpv4Dns1,
#[error("got no ipv4 secondary dns")]
NoIpv4Dns2,
#[error("got no ipv6 link-local address")]
NoIpv6Local,
#[error("got no ipv6 link-local peer address")]
NoIpv6Remote,
#[error("no mac address on interface {0}")]
NoMacAddress(String),
#[error("no magic number negotiated locally")]
NoMagicNumber,
#[error("ipv4 configuration update channel is closed")]
V4ChannelClosed,
#[error("ipv6 configuration update channel is closed")]
V6ChannelClosed,
#[error("io error: {0}")]
Io(#[from] io::Error),
#[error("interface name contains nul byte: {0}")]
Nul(#[from] ffi::NulError),
#[error("error joining tokio task: {0}")]
Join(#[from] task::JoinError),
#[error("error sending Option<Ipv4Config> to tokio mpsc channel: {0}")]
MpscSendV4(#[from] mpsc::error::SendError<Option<Ipv4Config>>),
#[error("error sending Option<Ipv6Config> to tokio mpsc channel: {0}")]
MpscSendV6(#[from] mpsc::error::SendError<Option<Ipv6Config>>),
#[error("error receiving from tokio watch channel: {0}")]
WatchRecv(#[from] watch::error::RecvError),
#[error("error retrieving local mac address: {0}")]
MacAddress(#[from] mac_address::MacAddressError),
#[error("netlinklib error: {0}")]
Netlinklib(#[from] rsdsl_netlinklib::Error),
#[error("ppproperly packet (de)serialization failed: {0}")]
Ppproperly(#[from] ppproperly::Error),
#[error("serde_json (de)serialization failed: {0}")]
SerdeJson(#[from] serde_json::Error),
}
/// An alias for a [`std::result::Result`] with the [`enum@Error`] type of this crate.
pub type Result<T> = std::result::Result<T, Error>;
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