libp2p_core/upgrade/
denied.rs

1// Copyright 2017-2018 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
21use std::{convert::Infallible, iter};
22
23use futures::future;
24
25use crate::upgrade::{InboundUpgrade, OutboundUpgrade, UpgradeInfo};
26
27/// Dummy implementation of `UpgradeInfo`/`InboundUpgrade`/`OutboundUpgrade` that doesn't support
28/// any protocol.
29#[derive(Debug, Copy, Clone)]
30pub struct DeniedUpgrade;
31
32impl UpgradeInfo for DeniedUpgrade {
33    type Info = &'static str;
34    type InfoIter = iter::Empty<Self::Info>;
35
36    fn protocol_info(&self) -> Self::InfoIter {
37        iter::empty()
38    }
39}
40
41impl<C> InboundUpgrade<C> for DeniedUpgrade {
42    type Output = Infallible;
43    type Error = Infallible;
44    type Future = future::Pending<Result<Self::Output, Self::Error>>;
45
46    fn upgrade_inbound(self, _: C, _: Self::Info) -> Self::Future {
47        future::pending()
48    }
49}
50
51impl<C> OutboundUpgrade<C> for DeniedUpgrade {
52    type Output = Infallible;
53    type Error = Infallible;
54    type Future = future::Pending<Result<Self::Output, Self::Error>>;
55
56    fn upgrade_outbound(self, _: C, _: Self::Info) -> Self::Future {
57        future::pending()
58    }
59}
libp2p_core/upgrade/denied.rs

libp2p_core/upgrade/
denied.rs
