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use std::{io, net, time};
use tokio::sync::watch;
use thiserror::Error;
#[derive(Debug, Error)]
pub enum Error {
#[error("lease has been obtained but doesn't exist")]
LeaseNotFound,
#[error("server did not include a client id option")]
NoClientId,
#[error("server did not include a domain name servers option")]
NoDns,
#[error("server did not include an ia_pd option")]
NoIAPD,
#[error("server did not include an ia_prefix option in the ia_pd option")]
NoIAPrefix,
#[error("server did not include a server id option")]
NoServerId,
#[error("unable to send full packet (expected {0}, got {1})")]
PartialSend(usize, usize),
#[error("too few domain name servers (expected at least 2, got {0})")]
TooFewDns(usize),
#[error("received packet with wrong client duid (expected {0}, got {1})")]
WrongClientId(String, String),
#[error("received packet with wrong server duid (expected {0}, got {1})")]
WrongServerId(String, String),
#[error("can't parse network address: {0}")]
AddrParse(#[from] net::AddrParseError),
#[error("io error: {0}")]
Io(#[from] io::Error),
#[error("system time monotonicity error: {0}")]
SystemTime(#[from] time::SystemTimeError),
#[error("can't receive from tokio watch channel: {0}")]
WatchRecv(#[from] watch::error::RecvError),
#[error("dhcproto decode: {0}")]
DhcprotoDecode(#[from] dhcproto::error::DecodeError),
#[error("dhcproto encode: {0}")]
DhcprotoEncode(#[from] dhcproto::error::EncodeError),
#[error("serde_json: {0}")]
SerdeJson(#[from] serde_json::Error),
}
pub type Result<T> = std::result::Result<T, Error>;
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