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use std::error::Error;
use std::fmt;
use std::marker::PhantomData;
pub trait Opaque: Send + Sync + 'static {}
impl<T> Opaque for T where T: Send + Sync + 'static {}
/// A send/recv callback takes 3 arguments:
///
/// * `0`, a reference to the opaque value assigned to the peer
/// * `1`, a bool indicating whether the message contained data (not just keepalive)
/// * `2`, a bool indicating whether the message was transmitted (i.e. did the peer have an associated endpoint?)
pub trait Callback<T>: Fn(&T, bool, bool) -> () + Sync + Send + 'static {}
impl<T, F> Callback<T> for F where F: Fn(&T, bool, bool) -> () + Sync + Send + 'static {}
/// A key callback takes 1 argument
///
/// * `0`, a reference to the opaque value assigned to the peer
pub trait KeyCallback<T>: Fn(&T) -> () + Sync + Send + 'static {}
impl<T, F> KeyCallback<T> for F where F: Fn(&T) -> () + Sync + Send + 'static {}
pub trait Endpoint: Send + Sync {}
pub trait Callbacks: Send + Sync + 'static {
type Opaque: Opaque;
type CallbackRecv: Callback<Self::Opaque>;
type CallbackSend: Callback<Self::Opaque>;
type CallbackKey: KeyCallback<Self::Opaque>;
}
/* Concrete implementation of "Callbacks",
* used to hide the constituent type parameters.
*
* This type is never instantiated.
*/
pub struct PhantomCallbacks<O: Opaque, R: Callback<O>, S: Callback<O>, K: KeyCallback<O>> {
_phantom_opaque: PhantomData<O>,
_phantom_recv: PhantomData<R>,
_phantom_send: PhantomData<S>,
_phantom_key: PhantomData<K>,
}
impl<O: Opaque, R: Callback<O>, S: Callback<O>, K: KeyCallback<O>> Callbacks
for PhantomCallbacks<O, R, S, K>
{
type Opaque = O;
type CallbackRecv = R;
type CallbackSend = S;
type CallbackKey = K;
}
#[derive(Debug)]
pub enum RouterError {
NoCryptKeyRoute,
MalformedIPHeader,
MalformedTransportMessage,
}
impl fmt::Display for RouterError {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
RouterError::NoCryptKeyRoute => write!(f, "No cryptkey route configured for subnet"),
RouterError::MalformedIPHeader => write!(f, "IP header is malformed"),
RouterError::MalformedTransportMessage => write!(f, "IP header is malformed"),
}
}
}
impl Error for RouterError {
fn description(&self) -> &str {
"Generic Handshake Error"
}
fn source(&self) -> Option<&(dyn Error + 'static)> {
None
}
}
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