openthread/ot/
dns_upstream.rs

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1// Copyright 2024 The Fuchsia Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5use crate::prelude_internal::*;
6use std::mem::transmute;
7
8/// DnsUpstream callback from platform to OT
9pub trait DnsUpstream {
10    /// Update DNS upstream query done
11    fn plat_dns_upstream_query_done(
12        &self,
13        query_context: &PlatDnsUpstreamQuery,
14        response: ot::Box<Message<'_>>,
15    );
16}
17
18impl<T: DnsUpstream + ot::Boxable> DnsUpstream for ot::Box<T> {
19    fn plat_dns_upstream_query_done(
20        &self,
21        query_context: &PlatDnsUpstreamQuery,
22        response: ot::Box<Message<'_>>,
23    ) {
24        self.as_ref().plat_dns_upstream_query_done(query_context, response)
25    }
26}
27
28// SAFETY: this call will be called only once for each &mut PlatDnsUpstreamQuery passed to lowpan,
29//         and the reference will be removed right after the call. It is ok to transmute it to
30//         mutable reference.
31#[allow(clippy::useless_transmute)]
32unsafe fn dns_upstream_query_context_get_mut(
33    original: &PlatDnsUpstreamQuery,
34) -> *mut otPlatDnsUpstreamQuery {
35    transmute(original)
36}
37
38impl DnsUpstream for Instance {
39    fn plat_dns_upstream_query_done(
40        &self,
41        query_context: &PlatDnsUpstreamQuery,
42        response: ot::Box<Message<'_>>,
43    ) {
44        unsafe {
45            otPlatDnsUpstreamQueryDone(
46                self.as_ot_ptr(),
47                dns_upstream_query_context_get_mut(query_context),
48                response.take_ot_ptr(),
49            );
50        }
51    }
52}
openthread/ot/dns_upstream.rs

openthread/ot/
dns_upstream.rs
