ockam_api 0.93.0

Ockam's request-response API
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

use crate::error::ApiError;
use crate::nodes::connection::{Changes, ConnectionBuilder, Instantiator};
use crate::{RemoteMultiaddrResolver, RemoteMultiaddrResolverConnection, ReverseLocalConverter};

use crate::nodes::NodeManager;
use ockam_core::{async_trait, Error, Route};
use ockam_multiaddr::proto::{DnsAddr, Ip4, Ip6, Tcp};
use ockam_multiaddr::{Match, MultiAddr, Protocol};
use ockam_node::Context;

/// Creates the tcp connection.
pub(crate) struct PlainTcpInstantiator {}

impl PlainTcpInstantiator {
    pub(crate) fn new() -> Self {
        Self {}
    }
}

#[async_trait]
impl Instantiator for PlainTcpInstantiator {
    fn matches(&self) -> Vec<Match> {
        vec![
            // matches any tcp address followed by a tcp protocol
            Match::any([DnsAddr::CODE, Ip4::CODE, Ip6::CODE]),
            Tcp::CODE.into(),
        ]
    }

    async fn instantiate(
        &self,
        _ctx: &Context,
        node_manager: &NodeManager,
        _transport_route: Route,
        extracted: (MultiAddr, MultiAddr, MultiAddr),
    ) -> Result<Changes, Error> {
        let (before, tcp_piece, after) = extracted;

        let mut tcp = RemoteMultiaddrResolver::default()
            .with_tcp(node_manager.tcp_transport.clone())
            .resolve(&tcp_piece)
            .await?;

        let multiaddr = ReverseLocalConverter::convert_route(&tcp.route)?;

        let current_multiaddr = ConnectionBuilder::combine(before, multiaddr, after)?;

        // since we only pass the piece regarding tcp
        // tcp_connection should exist
        let tcp_connection = tcp
            .connection
            .take()
            .ok_or_else(|| ApiError::core("TCP connection should be set"))?;

        let tcp_connection = match tcp_connection {
            RemoteMultiaddrResolverConnection::Tcp(tcp_connection) => tcp_connection,
            RemoteMultiaddrResolverConnection::Udp(_) => {
                return Err(ApiError::core("TCP connection should be set"));
            }
        };

        Ok(Changes {
            current_multiaddr,
            flow_control_id: tcp.flow_control_id,
            secure_channel_encryptors: vec![],
            tcp_connection: Some(tcp_connection),
            udp_bind: None,
        })
    }
}