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use super::loader::{DriverLoader};
#[cfg(feature = "tcp")]
use crate::adapters::tcp::{TcpAdapter};
#[cfg(feature = "tcp")]
use crate::adapters::framed_tcp::{FramedTcpAdapter};
#[cfg(feature = "udp")]
use crate::adapters::udp::{self, UdpAdapter};
#[cfg(feature = "websocket")]
use crate::adapters::ws::{self, WsAdapter};
use strum::{EnumIter};
use serde::{Serialize, Deserialize};
/// Enum to identified the underlying transport used.
/// It can be passed to
/// [`NetworkController::connect()`](crate::network::NetworkController::connect()) and
/// [`NetworkController::listen()`](crate::network::NetworkController::connect()) methods
/// to specify the transport used.
#[derive(EnumIter, Serialize, Deserialize, Clone, Copy, PartialEq, Eq, Hash, Debug)]
pub enum Transport {
/// TCP protocol (available through the *tcp* feature).
/// As stream protocol, receiving a message from TCP do not imply to read
/// the entire message.
/// If you want a packet based way to send over TCP, use `FramedTcp` instead.
#[cfg(feature = "tcp")]
Tcp,
/// Tcp framed protocol (available through the *tcp* feature).
/// Like TCP, but encoded with a slim frame layer to manage the data as a packet,
/// instead of as a stream.
/// It prefixes the message using variable integer encoding with the size of the message.
/// Most of the time you would want to use this instead of the raw `Tcp`.
#[cfg(feature = "tcp")]
FramedTcp,
/// UDP protocol (available through the *udp* feature).
/// Take into account that UDP is not connection oriented and a packet can be lost
/// or received disordered.
/// If it is specified in the listener and the address is a Ipv4 in the range of multicast ips
/// (from `224.0.0.0` to `239.255.255.255`), the listener will be configured in multicast mode.
#[cfg(feature = "udp")]
Udp,
/// WebSocket protocol (available through the *websocket* feature).
/// If you use a [`crate::network::RemoteAddr::Str`] in the `connect()` method,
/// you can specify an URL with `wss` of `ws` schemas to connect with or without security.
/// If you use a [`crate::network::RemoteAddr::Socket`] the socket will be a normal
/// websocket with the following uri: `ws://{SocketAddr}/message-io-default`.
#[cfg(feature = "websocket")]
Ws,
}
impl Transport {
/// Associates an adapter.
/// This method mounts the adapters to be used in the network instance.
pub fn mount_adapter(self, loader: &mut DriverLoader) {
match self {
#[cfg(feature = "tcp")]
Self::Tcp => loader.mount(self.id(), TcpAdapter),
#[cfg(feature = "tcp")]
Self::FramedTcp => loader.mount(self.id(), FramedTcpAdapter),
#[cfg(feature = "udp")]
Self::Udp => loader.mount(self.id(), UdpAdapter),
#[cfg(feature = "websocket")]
Self::Ws => loader.mount(self.id(), WsAdapter),
};
}
/// Maximum teorical packet payload length available for each transport.
///
/// Note: For UDP this value *depends* of the OS.
/// The value returned by this function is the **teorical maximum** and could not be valid for
/// all OS (*MacOS* in as an example of this).
/// You can ensure your message not exceeds `udp::MAX_COMPATIBLE_UDP_PAYLOAD_LEN` in order to be
/// more cross-platform compatible.
pub const fn max_message_size(self) -> usize {
match self {
#[cfg(feature = "tcp")]
Self::Tcp => usize::MAX,
#[cfg(feature = "tcp")]
Self::FramedTcp => usize::MAX,
#[cfg(feature = "udp")]
Self::Udp => udp::MAX_PAYLOAD_LEN,
#[cfg(feature = "websocket")]
Self::Ws => ws::MAX_PAYLOAD_LEN,
}
}
/// Tell if the transport protocol is a connection oriented protocol.
/// If it is, `Connection` and `Disconnection` events will be generated.
pub const fn is_connection_oriented(self) -> bool {
match self {
#[cfg(feature = "tcp")]
Transport::Tcp => true,
#[cfg(feature = "tcp")]
Transport::FramedTcp => true,
#[cfg(feature = "udp")]
Transport::Udp => false,
#[cfg(feature = "websocket")]
Transport::Ws => true,
}
}
/// Tell if the transport protocol is a packet based protocol.
/// It implies that any send call corresponds to a data message event.
/// The opossite of a packet based is a stream based transport (e.g Tcp).
/// In this case, reading a data message event do not imply reading the entire message sent.
/// It is in change of the user to determinate how to read the data.
pub const fn is_packet_based(self) -> bool {
match self {
#[cfg(feature = "tcp")]
Transport::Tcp => false,
#[cfg(feature = "tcp")]
Transport::FramedTcp => true,
#[cfg(feature = "udp")]
Transport::Udp => true,
#[cfg(feature = "websocket")]
Transport::Ws => true,
}
}
/// Returns the adapter id used for this transport.
/// It is equivalent to the position of the enum starting by 0
pub const fn id(self) -> u8 {
self as u8
}
}
impl std::fmt::Display for Transport {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{:?}", self)
}
}