fips-core 0.3.92

Reusable FIPS mesh, endpoint, transport, and protocol library
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

impl Node {
    pub(in crate::node) fn collect_deferred_session_forward_terminals(
        &mut self,
        turn: &mut crate::dataplane::DataplaneLiveNodeTurn,
    ) -> usize {
        let mut completed = 0usize;
        turn.consume_transport_sent_receipts(|receipt| {
            let Some(send_token) = receipt.send_token else {
                return false;
            };
            let Some(forward) = self.deferred_session_forwards.take_pending(send_token) else {
                return false;
            };
            let next_hop_addr = forward.next_hop_addr;
            let result = if let Some(timestamp_ms) = receipt.fmp_timestamp_ms {
                let bytes_sent = receipt.payload_len;
                self.dataplane.record_fmp_mmp_send_result(
                    &next_hop_addr,
                    receipt.counter,
                    timestamp_ms,
                    bytes_sent,
                );
                let _ = self
                    .peers
                    .record_fmp_send_bookkeeping(&next_hop_addr, bytes_sent);
                let send_result: Result<usize, crate::transport::TransportError> = Ok(bytes_sent);
                self.note_local_send_outcome(&next_hop_addr, &send_result);
                Ok(())
            } else {
                Err(NodeError::SendFailed {
                    node_addr: next_hop_addr,
                    reason: "dataplane FMP timestamp missing".into(),
                })
            };
            self.deferred_session_forwards
                .push_completed(forward, result);
            completed = completed.saturating_add(1);
            true
        });

        turn.consume_output_drops(|drop| {
            let Some(send_token) = drop.send_token() else {
                return false;
            };
            let Some(forward) = self.deferred_session_forwards.take_pending(send_token) else {
                return false;
            };
            let next_hop_addr = forward.next_hop_addr;
            let error = self.dataplane_fmp_output_drop_error(next_hop_addr, drop);
            self.deferred_session_forwards
                .push_completed(forward, Err(error));
            completed = completed.saturating_add(1);
            true
        });

        turn.consume_drops(|drop| {
            let Some(send_token) = drop.send_token() else {
                return false;
            };
            let Some(forward) = self.deferred_session_forwards.take_pending(send_token) else {
                return false;
            };
            let next_hop_addr = forward.next_hop_addr;
            let error = NodeError::SendFailed {
                node_addr: next_hop_addr,
                reason: format!("dataplane FMP packet dropped: {:?}", drop.reason()),
            };
            self.deferred_session_forwards
                .push_completed(forward, Err(error));
            completed = completed.saturating_add(1);
            true
        });
        completed
    }

    pub(in crate::node) async fn finish_completed_session_forwards(&mut self) -> usize {
        let mut processed = 0usize;
        let mut failed_routes = std::collections::HashSet::new();
        while let Some((forward, result)) = self.deferred_session_forwards.pop_completed() {
            let record_route_failure = claim_route_failure_once(
                &mut failed_routes,
                forward.dest_addr,
                forward.next_hop_addr,
                result.is_err(),
            );
            self.finish_prepared_session_forward(forward, result, record_route_failure)
                .await;
            processed = processed.saturating_add(1);
        }
        processed
    }

    async fn drain_one_deferred_session_forward_turn(&mut self) -> usize {
        let pending_before = self.deferred_session_forwards.pending_len();
        if pending_before == 0 {
            return self.finish_completed_session_forwards().await;
        }
        let turn = self
            .pump_dataplane_pending_outbound_firsts(
                crate::dataplane::DataplaneLiveOutboundFirsts {
                    collect_transport_sent_receipts: true,
                    ..Default::default()
                },
                0,
                0,
                pending_before.min(forwarding_submission_limit(
                    self.dataplane_transport_send_batch_packets,
                )),
            )
            .await;
        self.defer_dataplane_control_turn(turn);
        let processed = self.finish_completed_session_forwards().await;
        if self.deferred_session_forwards.pending_len() >= pending_before {
            self.wait_for_dataplane_completion().await;
        }
        processed
    }

    pub(in crate::node) async fn drain_deferred_session_forwards(&mut self) -> usize {
        let mut processed = self.finish_completed_session_forwards().await;
        while self.deferred_session_forwards.pending_len() > 0 {
            processed =
                processed.saturating_add(self.drain_one_deferred_session_forward_turn().await);
        }
        processed
    }

    pub(in crate::node) async fn abort_deferred_session_forwards(
        &mut self,
        reason: &'static str,
    ) -> usize {
        self.deferred_session_forwards.abort_pending(reason);
        self.finish_completed_session_forwards().await
    }
}