92 lines
2.5 KiB
Rust
92 lines
2.5 KiB
Rust
//! Convenience wrapper for streams to switch between plain TCP and TLS at runtime.
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//!
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//! There is no dependency on actual TLS implementations. Everything like
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//! `native_tls` or `openssl` will work as long as there is a TLS stream supporting standard
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//! `Read + Write` traits.
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use std::io::{Read, Result as IoResult, Write};
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use std::net::TcpStream;
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#[cfg(feature = "native-tls")]
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use native_tls_crate::TlsStream;
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#[cfg(feature = "rustls-tls")]
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use rustls::StreamOwned;
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/// Stream mode, either plain TCP or TLS.
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#[derive(Clone, Copy, Debug)]
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pub enum Mode {
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/// Plain mode (`ws://` URL).
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Plain,
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/// TLS mode (`wss://` URL).
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Tls,
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}
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/// Trait to switch TCP_NODELAY.
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pub trait NoDelay {
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/// Set the TCP_NODELAY option to the given value.
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fn set_nodelay(&mut self, nodelay: bool) -> IoResult<()>;
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}
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impl NoDelay for TcpStream {
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fn set_nodelay(&mut self, nodelay: bool) -> IoResult<()> {
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TcpStream::set_nodelay(self, nodelay)
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}
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}
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#[cfg(feature = "native-tls")]
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impl<S: Read + Write + NoDelay> NoDelay for TlsStream<S> {
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fn set_nodelay(&mut self, nodelay: bool) -> IoResult<()> {
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self.get_mut().set_nodelay(nodelay)
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}
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}
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#[cfg(feature = "rustls-tls")]
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impl<S: rustls::Session, T: Read + Write + NoDelay> NoDelay for StreamOwned<S, T> {
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fn set_nodelay(&mut self, nodelay: bool) -> IoResult<()> {
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self.sock.set_nodelay(nodelay)
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}
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}
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/// Stream, either plain TCP or TLS.
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#[derive(Debug)]
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pub enum Stream<S, T> {
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/// Unencrypted socket stream.
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Plain(S),
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/// Encrypted socket stream.
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Tls(T),
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}
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impl<S: Read, T: Read> Read for Stream<S, T> {
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fn read(&mut self, buf: &mut [u8]) -> IoResult<usize> {
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match *self {
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Stream::Plain(ref mut s) => s.read(buf),
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Stream::Tls(ref mut s) => s.read(buf),
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}
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}
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}
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impl<S: Write, T: Write> Write for Stream<S, T> {
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fn write(&mut self, buf: &[u8]) -> IoResult<usize> {
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match *self {
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Stream::Plain(ref mut s) => s.write(buf),
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Stream::Tls(ref mut s) => s.write(buf),
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}
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}
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fn flush(&mut self) -> IoResult<()> {
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match *self {
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Stream::Plain(ref mut s) => s.flush(),
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Stream::Tls(ref mut s) => s.flush(),
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}
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}
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}
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impl<S: NoDelay, T: NoDelay> NoDelay for Stream<S, T> {
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fn set_nodelay(&mut self, nodelay: bool) -> IoResult<()> {
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match *self {
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Stream::Plain(ref mut s) => s.set_nodelay(nodelay),
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Stream::Tls(ref mut s) => s.set_nodelay(nodelay),
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}
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}
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}
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