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use std::{ffi, io, net};
use dhcproto::v4::{MessageType, Opcode};
use thiserror::Error;
#[derive(Debug, Error)]
pub enum Error {
#[error("unhandled or unknown message type {0:?}")]
InvalidMsgType(MessageType),
#[error("unhandled or unknown opcode {0:?}")]
InvalidOpcode(Opcode),
#[error("missing ip address in dhcprequest")]
NoAddrRequested,
#[error("no ipv4 address on interface {0}")]
NoIpv4Addr(String),
#[error("missing message type")]
NoMsgType,
#[error("failed to send whole packet (expected {0}, got {1})")]
PartialSend(usize, usize),
#[error("address pool exhausted")]
PoolExhausted,
#[error("can't parse network address: {0}")]
AddrParseError(#[from] net::AddrParseError),
#[error("string contains nul bytes: {0}")]
Nul(#[from] ffi::NulError),
#[error("io error: {0}")]
Io(#[from] io::Error),
#[error("dhcproto decode error: {0}")]
DhcprotoDecode(#[from] dhcproto::error::DecodeError),
#[error("dhcproto encode error: {0}")]
DhcprotoEncode(#[from] dhcproto::error::EncodeError),
#[error("netlinklib error: {0}")]
Netlinklib(#[from] rsdsl_netlinklib::Error),
#[error("serde_json error: {0}")]
SerdeJson(#[from] serde_json::Error),
}
pub type Result<T> = std::result::Result<T, Error>;
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