libp2p/builder/
select_muxer.rs

1// Copyright 2018 Parity Technologies (UK) Ltd.
2//
3// Permission is hereby granted, free of charge, to any person obtaining a
4// copy of this software and associated documentation files (the "Software"),
5// to deal in the Software without restriction, including without limitation
6// the rights to use, copy, modify, merge, publish, distribute, sublicense,
7// and/or sell copies of the Software, and to permit persons to whom the
8// Software is furnished to do so, subject to the following conditions:
9//
10// The above copyright notice and this permission notice shall be included in
11// all copies or substantial portions of the Software.
12//
13// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
14// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
19// DEALINGS IN THE SOFTWARE.
20
21#![allow(unreachable_pub)]
22
23use either::Either;
24use futures::future;
25use libp2p_core::either::EitherFuture;
26use libp2p_core::upgrade::{InboundConnectionUpgrade, OutboundConnectionUpgrade};
27use libp2p_core::UpgradeInfo;
28use std::iter::{Chain, Map};
29
30#[derive(Debug, Clone)]
31pub struct SelectMuxerUpgrade<A, B>(A, B);
32
33impl<A, B> SelectMuxerUpgrade<A, B> {
34    pub fn new(a: A, b: B) -> Self {
35        SelectMuxerUpgrade(a, b)
36    }
37}
38
39impl<A, B> UpgradeInfo for SelectMuxerUpgrade<A, B>
40where
41    A: UpgradeInfo,
42    B: UpgradeInfo,
43{
44    type Info = Either<A::Info, B::Info>;
45    type InfoIter = Chain<
46        Map<<A::InfoIter as IntoIterator>::IntoIter, fn(A::Info) -> Self::Info>,
47        Map<<B::InfoIter as IntoIterator>::IntoIter, fn(B::Info) -> Self::Info>,
48    >;
49
50    fn protocol_info(&self) -> Self::InfoIter {
51        let a = self
52            .0
53            .protocol_info()
54            .into_iter()
55            .map(Either::Left as fn(A::Info) -> _);
56        let b = self
57            .1
58            .protocol_info()
59            .into_iter()
60            .map(Either::Right as fn(B::Info) -> _);
61
62        a.chain(b)
63    }
64}
65
66impl<C, A, B, TA, TB, EA, EB> InboundConnectionUpgrade<C> for SelectMuxerUpgrade<A, B>
67where
68    A: InboundConnectionUpgrade<C, Output = TA, Error = EA>,
69    B: InboundConnectionUpgrade<C, Output = TB, Error = EB>,
70{
71    type Output = future::Either<TA, TB>;
72    type Error = Either<EA, EB>;
73    type Future = EitherFuture<A::Future, B::Future>;
74
75    fn upgrade_inbound(self, sock: C, info: Self::Info) -> Self::Future {
76        match info {
77            Either::Left(info) => EitherFuture::First(self.0.upgrade_inbound(sock, info)),
78            Either::Right(info) => EitherFuture::Second(self.1.upgrade_inbound(sock, info)),
79        }
80    }
81}
82
83impl<C, A, B, TA, TB, EA, EB> OutboundConnectionUpgrade<C> for SelectMuxerUpgrade<A, B>
84where
85    A: OutboundConnectionUpgrade<C, Output = TA, Error = EA>,
86    B: OutboundConnectionUpgrade<C, Output = TB, Error = EB>,
87{
88    type Output = future::Either<TA, TB>;
89    type Error = Either<EA, EB>;
90    type Future = EitherFuture<A::Future, B::Future>;
91
92    fn upgrade_outbound(self, sock: C, info: Self::Info) -> Self::Future {
93        match info {
94            Either::Left(info) => EitherFuture::First(self.0.upgrade_outbound(sock, info)),
95            Either::Right(info) => EitherFuture::Second(self.1.upgrade_outbound(sock, info)),
96        }
97    }
98}
libp2p/builder/select_muxer.rs

libp2p/builder/
select_muxer.rs
