ntkd 0.1.9

The Netsukuku routing daemon: composes the ntk-* library crates into a running node.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207

// SPDX-FileCopyrightText: 2026 Gianluca Boiano
// SPDX-License-Identifier: GPL-3.0-or-later

//! [`SendNetlink`] + [`KernelHandle`]: a `Send`-provable bridge onto [`ntk_netlink::Netlink`],
//! and a cheap-clone `Arc<K>` wrapper implementing it by delegation — mirroring
//! `ntk_neighborhood::interface_state::InterfaceState`'s own rationale exactly.
//!
//! `ntk-netlink`'s traits are `async fn`s-in-a-trait with `#[allow(async_fn_in_trait)]`
//! suppressing the "future may not be `Send`" lint, on the documented assumption that generic
//! callers never cross a `tokio::spawn` boundary with one. This daemon's steady-state loop
//! (`crate::node::lifecycle`) *does* spawn a task that calls into a generic `K: Netlink`
//! (through [`crate::kernel::routes::RouteInstaller`]), so it needs a provably-`Send` future —
//! [`SendNetlink`] states that boundary explicitly via `BoxFuture` (which bakes in `Send`),
//! implemented concretely for exactly `ntk-netlink`'s two real implementors (both of which are
//! genuinely `Send`, per `ntk_neighborhood::interface_state`'s own module doc). [`KernelHandle`]
//! then re-implements `Netlink`'s four traits over any `SendNetlink`, so
//! `RouteInstaller<KernelHandle<K>>` gets a provably-`Send` future for free.

use std::sync::Arc;

use futures::future::BoxFuture;
use ntk_netlink::{
    AddressEntry, AddressTable, FakeNetlink, Interface, Ipv4Net, LinkInfo, NeighbourInfo,
    NetlinkError, RealNetlink, RouteKey, RouteSpec, RouteTable, RuleSpec, RuleTable, TopologyQuery,
};

/// `Send`-provable version of [`ntk_netlink::Netlink`]'s four traits, combined — see the module
/// doc. Implemented concretely for [`RealNetlink`] and [`FakeNetlink`] only.
pub trait SendNetlink: Send + Sync + std::fmt::Debug {
    fn add_address<'a>(
        &'a self,
        interface: &'a Interface,
        network: Ipv4Net,
    ) -> BoxFuture<'a, Result<(), NetlinkError>>;
    fn remove_address<'a>(
        &'a self,
        interface: &'a Interface,
        network: Ipv4Net,
    ) -> BoxFuture<'a, Result<(), NetlinkError>>;
    fn list_addresses<'a>(
        &'a self,
        interface: Option<&'a Interface>,
    ) -> BoxFuture<'a, Result<Vec<AddressEntry>, NetlinkError>>;
    fn add_route<'a>(&'a self, route: &'a RouteSpec) -> BoxFuture<'a, Result<(), NetlinkError>>;
    fn change_route<'a>(&'a self, route: &'a RouteSpec) -> BoxFuture<'a, Result<(), NetlinkError>>;
    fn remove_route(&self, route: RouteKey) -> BoxFuture<'_, Result<(), NetlinkError>>;
    fn list_routes(
        &self,
        table: Option<u32>,
    ) -> BoxFuture<'_, Result<Vec<RouteSpec>, NetlinkError>>;
    fn add_rule<'a>(&'a self, rule: &'a RuleSpec) -> BoxFuture<'a, Result<(), NetlinkError>>;
    fn remove_rule<'a>(&'a self, rule: &'a RuleSpec) -> BoxFuture<'a, Result<(), NetlinkError>>;
    fn list_rules(&self) -> BoxFuture<'_, Result<Vec<RuleSpec>, NetlinkError>>;
    fn list_links(&self) -> BoxFuture<'_, Result<Vec<LinkInfo>, NetlinkError>>;
    fn list_neighbours<'a>(
        &'a self,
        interface: Option<&'a Interface>,
    ) -> BoxFuture<'a, Result<Vec<NeighbourInfo>, NetlinkError>>;
}

macro_rules! impl_send_netlink {
    ($ty:ty) => {
        impl SendNetlink for $ty {
            fn add_address<'a>(
                &'a self,
                interface: &'a Interface,
                network: Ipv4Net,
            ) -> BoxFuture<'a, Result<(), NetlinkError>> {
                Box::pin(AddressTable::add_address(self, interface, network))
            }
            fn remove_address<'a>(
                &'a self,
                interface: &'a Interface,
                network: Ipv4Net,
            ) -> BoxFuture<'a, Result<(), NetlinkError>> {
                Box::pin(AddressTable::remove_address(self, interface, network))
            }
            fn list_addresses<'a>(
                &'a self,
                interface: Option<&'a Interface>,
            ) -> BoxFuture<'a, Result<Vec<AddressEntry>, NetlinkError>> {
                Box::pin(AddressTable::list_addresses(self, interface))
            }
            fn add_route<'a>(
                &'a self,
                route: &'a RouteSpec,
            ) -> BoxFuture<'a, Result<(), NetlinkError>> {
                Box::pin(RouteTable::add_route(self, route))
            }
            fn change_route<'a>(
                &'a self,
                route: &'a RouteSpec,
            ) -> BoxFuture<'a, Result<(), NetlinkError>> {
                Box::pin(RouteTable::change_route(self, route))
            }
            fn remove_route(&self, route: RouteKey) -> BoxFuture<'_, Result<(), NetlinkError>> {
                Box::pin(RouteTable::remove_route(self, route))
            }
            fn list_routes(
                &self,
                table: Option<u32>,
            ) -> BoxFuture<'_, Result<Vec<RouteSpec>, NetlinkError>> {
                Box::pin(RouteTable::list_routes(self, table))
            }
            fn add_rule<'a>(
                &'a self,
                rule: &'a RuleSpec,
            ) -> BoxFuture<'a, Result<(), NetlinkError>> {
                Box::pin(RuleTable::add_rule(self, rule))
            }
            fn remove_rule<'a>(
                &'a self,
                rule: &'a RuleSpec,
            ) -> BoxFuture<'a, Result<(), NetlinkError>> {
                Box::pin(RuleTable::remove_rule(self, rule))
            }
            fn list_rules(&self) -> BoxFuture<'_, Result<Vec<RuleSpec>, NetlinkError>> {
                Box::pin(RuleTable::list_rules(self))
            }
            fn list_links(&self) -> BoxFuture<'_, Result<Vec<LinkInfo>, NetlinkError>> {
                Box::pin(TopologyQuery::list_links(self))
            }
            fn list_neighbours<'a>(
                &'a self,
                interface: Option<&'a Interface>,
            ) -> BoxFuture<'a, Result<Vec<NeighbourInfo>, NetlinkError>> {
                Box::pin(TopologyQuery::list_neighbours(self, interface))
            }
        }
    };
}

impl_send_netlink!(RealNetlink);
impl_send_netlink!(FakeNetlink);

/// Cheap-clone `Arc<K>` wrapper re-implementing `ntk_netlink::Netlink`'s four traits over any
/// [`SendNetlink`], with a provably-`Send` future (see the module doc).
#[derive(Debug)]
pub struct KernelHandle<K>(pub Arc<K>);

impl<K> Clone for KernelHandle<K> {
    fn clone(&self) -> Self {
        Self(self.0.clone())
    }
}

impl<K: SendNetlink> AddressTable for KernelHandle<K> {
    async fn add_address(
        &self,
        interface: &Interface,
        network: Ipv4Net,
    ) -> Result<(), NetlinkError> {
        self.0.add_address(interface, network).await
    }
    async fn remove_address(
        &self,
        interface: &Interface,
        network: Ipv4Net,
    ) -> Result<(), NetlinkError> {
        self.0.remove_address(interface, network).await
    }
    async fn list_addresses(
        &self,
        interface: Option<&Interface>,
    ) -> Result<Vec<AddressEntry>, NetlinkError> {
        self.0.list_addresses(interface).await
    }
}

impl<K: SendNetlink> RouteTable for KernelHandle<K> {
    async fn add_route(&self, route: &RouteSpec) -> Result<(), NetlinkError> {
        self.0.add_route(route).await
    }
    async fn change_route(&self, route: &RouteSpec) -> Result<(), NetlinkError> {
        self.0.change_route(route).await
    }
    async fn remove_route(&self, route: RouteKey) -> Result<(), NetlinkError> {
        self.0.remove_route(route).await
    }
    async fn list_routes(&self, table: Option<u32>) -> Result<Vec<RouteSpec>, NetlinkError> {
        self.0.list_routes(table).await
    }
}

impl<K: SendNetlink> RuleTable for KernelHandle<K> {
    async fn add_rule(&self, rule: &RuleSpec) -> Result<(), NetlinkError> {
        self.0.add_rule(rule).await
    }
    async fn remove_rule(&self, rule: &RuleSpec) -> Result<(), NetlinkError> {
        self.0.remove_rule(rule).await
    }
    async fn list_rules(&self) -> Result<Vec<RuleSpec>, NetlinkError> {
        self.0.list_rules().await
    }
}

impl<K: SendNetlink> TopologyQuery for KernelHandle<K> {
    async fn list_links(&self) -> Result<Vec<LinkInfo>, NetlinkError> {
        self.0.list_links().await
    }
    async fn list_neighbours(
        &self,
        interface: Option<&Interface>,
    ) -> Result<Vec<NeighbourInfo>, NetlinkError> {
        self.0.list_neighbours(interface).await
    }
}