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use static_assertions::assert_impl_all;
use std::{convert::Infallible, error, fmt, io, sync::Arc};
use zbus_names::{Error as NamesError, OwnedErrorName};
use zvariant::Error as VariantError;
use crate::{fdo, Message, MessageType};
#[derive(Debug)]
#[non_exhaustive]
#[allow(clippy::upper_case_acronyms)]
pub enum Error {
InterfaceNotFound,
Address(String),
Io(io::Error),
InsufficientData,
InvalidField,
ExcessData,
Variant(VariantError),
Names(NamesError),
IncorrectEndian,
Handshake(String),
InvalidReply,
MethodError(OwnedErrorName, Option<String>, Arc<Message>),
MissingField,
InvalidGUID,
Unsupported,
FDO(Box<fdo::Error>),
#[cfg(feature = "xml")]
SerdeXml(serde_xml_rs::Error),
NoBodySignature,
UnmatchedBodySignature,
}
assert_impl_all!(Error: Send, Sync, Unpin);
impl PartialEq for Error {
fn eq(&self, other: &Self) -> bool {
match (self, other) {
(Self::Address(_), Self::Address(_)) => true,
(Self::InsufficientData, Self::InsufficientData) => true,
(Self::InterfaceNotFound, Self::InterfaceNotFound) => true,
(Self::Handshake(_), Self::Handshake(_)) => true,
(Self::InvalidReply, Self::InvalidReply) => true,
(Self::ExcessData, Self::ExcessData) => true,
(Self::IncorrectEndian, Self::IncorrectEndian) => true,
(Self::MethodError(_, _, _), Self::MethodError(_, _, _)) => true,
(Self::MissingField, Self::MissingField) => true,
(Self::InvalidGUID, Self::InvalidGUID) => true,
(Self::Unsupported, Self::Unsupported) => true,
(Self::FDO(s), Self::FDO(o)) => s == o,
(Self::NoBodySignature, Self::NoBodySignature) => true,
(Self::UnmatchedBodySignature, Self::UnmatchedBodySignature) => true,
(Self::InvalidField, Self::InvalidField) => true,
(Self::Variant(s), Self::Variant(o)) => s == o,
(Self::Names(s), Self::Names(o)) => s == o,
(Error::Io(_), Self::Io(_)) => false,
#[cfg(feature = "xml")]
(Self::SerdeXml(_), Self::SerdeXml(_)) => false,
(_, _) => false,
}
}
}
impl error::Error for Error {
fn source(&self) -> Option<&(dyn error::Error + 'static)> {
match self {
Error::InterfaceNotFound => None,
Error::Address(_) => None,
Error::Io(e) => Some(e),
Error::ExcessData => None,
Error::Handshake(_) => None,
Error::InsufficientData => None,
Error::IncorrectEndian => None,
Error::Variant(e) => Some(e),
Error::Names(e) => Some(e),
Error::InvalidReply => None,
Error::MethodError(_, _, _) => None,
Error::InvalidGUID => None,
Error::Unsupported => None,
Error::FDO(e) => Some(e),
#[cfg(feature = "xml")]
Error::SerdeXml(e) => Some(e),
Error::NoBodySignature => None,
Error::InvalidField => None,
Error::MissingField => None,
Error::UnmatchedBodySignature => None,
}
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
Error::InterfaceNotFound => write!(f, "Interface not found"),
Error::Address(e) => write!(f, "address error: {}", e),
Error::ExcessData => write!(f, "excess data"),
Error::Io(e) => write!(f, "I/O error: {}", e),
Error::Handshake(e) => write!(f, "D-Bus handshake failed: {}", e),
Error::InsufficientData => write!(
f,
"Insufficient data provided to create a valid D-Bus message"
),
Error::IncorrectEndian => write!(f, "incorrect endian"),
Error::InvalidField => write!(f, "invalid message field"),
Error::Variant(e) => write!(f, "{}", e),
Error::Names(e) => write!(f, "{}", e),
Error::InvalidReply => write!(f, "Invalid D-Bus method reply"),
Error::MissingField => write!(f, "A required field is missing from message headers"),
Error::MethodError(name, detail, _reply) => write!(
f,
"{}: {}",
**name,
detail.as_ref().map(|s| s.as_str()).unwrap_or("no details")
),
Error::InvalidGUID => write!(f, "Invalid GUID"),
Error::Unsupported => write!(f, "Connection support is lacking"),
Error::FDO(e) => write!(f, "{}", e),
#[cfg(feature = "xml")]
Error::SerdeXml(e) => write!(f, "XML error: {}", e),
Error::NoBodySignature => write!(f, "missing body signature in the message"),
Error::UnmatchedBodySignature => write!(f, "unmatched body signature"),
}
}
}
impl From<io::Error> for Error {
fn from(val: io::Error) -> Self {
Error::Io(val)
}
}
impl From<nix::Error> for Error {
fn from(val: nix::Error) -> Self {
val.as_errno()
.map(|errno| io::Error::from_raw_os_error(errno as i32).into())
.unwrap_or_else(|| io::Error::new(io::ErrorKind::Other, val).into())
}
}
impl From<VariantError> for Error {
fn from(val: VariantError) -> Self {
Error::Variant(val)
}
}
impl From<NamesError> for Error {
fn from(val: NamesError) -> Self {
match val {
NamesError::Variant(e) => Error::Variant(e),
e => Error::Names(e),
}
}
}
impl From<fdo::Error> for Error {
fn from(val: fdo::Error) -> Self {
match val {
fdo::Error::ZBus(e) => e,
e => Error::FDO(Box::new(e)),
}
}
}
#[cfg(feature = "xml")]
impl From<serde_xml_rs::Error> for Error {
fn from(val: serde_xml_rs::Error) -> Self {
Error::SerdeXml(val)
}
}
impl From<Infallible> for Error {
fn from(i: Infallible) -> Self {
match i {}
}
}
impl From<Message> for Error {
fn from(message: Message) -> Error {
Self::from(Arc::new(message))
}
}
impl From<Arc<Message>> for Error {
fn from(message: Arc<Message>) -> Error {
let header = match message.header() {
Ok(header) => header,
Err(e) => {
return e;
}
};
if header.primary().msg_type() != MessageType::Error {
return Error::InvalidReply;
}
if let Ok(Some(name)) = header.error_name() {
let name = name.to_owned().into();
match message.body_unchecked::<&str>() {
Ok(detail) => Error::MethodError(name, Some(String::from(detail)), message),
Err(_) => Error::MethodError(name, None, message),
}
} else {
Error::InvalidReply
}
}
}
pub type Result<T> = std::result::Result<T, Error>;