Path/node cleanup stuff, build fixes.

network-hypervisor/src/util/pool.rs

@@ -157,12 +157,12 @@ unsafe impl<O, F: PoolFactory<O>> Send for Pool<O, F> {}
 
 #[cfg(test)]
 mod tests {
-    use std::sync::atomic::{AtomicUsize, Ordering};
     use std::ops::DerefMut;
+    use std::sync::Arc;
+    use std::sync::atomic::{AtomicUsize, Ordering};
     use std::time::Duration;
 
     use crate::util::pool::*;
-    use std::sync::Arc;
 
     struct TestPoolFactory;
 

network-hypervisor/src/vl1/constants.rs

@@ -108,3 +108,6 @@ pub const WHOIS_RETRY_MAX: u16 = 3;
 
 /// Maximum number of endpoints allowed in a Locator.
 pub const LOCATOR_MAX_ENDPOINTS: usize = 32;
+
+/// Keepalive interval for paths in milliseconds.
+pub const PATH_KEEPALIVE_INTERVAL: i64 = 20000;

network-hypervisor/src/vl1/node.rs

@@ -116,6 +116,7 @@ pub trait VL1PacketHandler {
 #[derive(Default)]
 struct BackgroundTaskIntervals {
     whois: IntervalGate<{ WhoisQueue::INTERVAL }>,
+    paths: IntervalGate<{ Path::INTERVAL }>,
 }
 
 pub struct Node {
@@ -212,6 +213,12 @@ impl Node {
         if intervals.whois.gate(tt) {
             self.whois.on_interval(self, ci, tt);
         }
+        if intervals.paths.gate(tt) {
+            self.paths.retain(|_, path| {
+                path.on_interval(ci, tt);
+                true
+            });
+        }
 
         Duration::from_millis(1000)
     }

network-hypervisor/src/vl1/path.rs

@@ -10,6 +10,10 @@ use crate::vl1::fragmentedpacket::FragmentedPacket;
 use crate::vl1::node::{PacketBuffer, VL1CallerInterface};
 use crate::vl1::protocol::PacketID;
 
+/// A remote endpoint paired with a local socket and a local interface.
+/// These are maintained in Node and canonicalized so that all unique paths have
+/// one and only one unique path object. That enables statistics to be tracked
+/// for them and uniform application of things like keepalives.
 pub struct Path {
     pub(crate) endpoint: Endpoint,
     pub(crate) local_socket: i64,
@@ -20,6 +24,8 @@ pub struct Path {
 }
 
 impl Path {
+    pub(crate) const INTERVAL: i64 = PATH_KEEPALIVE_INTERVAL;
+
     #[inline(always)]
     pub fn new(endpoint: Endpoint, local_socket: i64, local_interface: i64) -> Self {
         Self {
@@ -42,7 +48,8 @@ impl Path {
         self.last_receive_time_ticks.load(Ordering::Relaxed)
     }
 
-    /// Receive a fragment and return a FragmentedPacket if the entire packet is assembled.
+    /// Receive a fragment and return a FragmentedPacket if the entire packet was assembled.
+    /// This returns None if more fragments are needed to assemble the packet.
     #[inline(always)]
     pub(crate) fn receive_fragment(&self, packet_id: PacketID, fragment_no: u8, fragment_expecting_count: u8, packet: PacketBuffer, time_ticks: i64) -> Option<FragmentedPacket> {
         self.last_receive_time_ticks.store(time_ticks, Ordering::Relaxed);
@@ -85,8 +92,7 @@ impl Path {
     }
 
     #[inline(always)]
-    pub fn do_background_tasks<CI: VL1CallerInterface>(&self, ct: &CI) {
-        let time_ticks = ct.time_ticks();
+    pub fn on_interval<CI: VL1CallerInterface>(&self, ct: &CI, time_ticks: i64) {
         self.fragmented_packets.lock().retain(|packet_id, frag| (time_ticks - frag.ts_ticks) < FRAGMENT_EXPIRATION);
     }
 }

service/Cargo.lock

@@ -1,5 +1,7 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "ansi_term"
 version = "0.11.0"
@@ -26,22 +28,6 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
 
-[[package]]
-name = "base64"
-version = "0.13.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "904dfeac50f3cdaba28fc6f57fdcddb75f49ed61346676a78c4ffe55877802fd"
-
-[[package]]
-name = "base64-serde"
-version = "0.6.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2e964e3e0a930303c7c0bdb28ebf691dd98d9eee4b8b68019d2c995710b58a18"
-dependencies = [
- "base64",
- "serde",
-]
-
 [[package]]
 name = "bitflags"
 version = "1.2.1"
@@ -928,18 +914,6 @@ version = "0.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "45af6a010d13e4cf5b54c94ba5a2b2eba5596b9e46bf5875612d332a1f2b3f86"
 
-[[package]]
-name = "zerotier-core"
-version = "0.1.0"
-dependencies = [
- "base64",
- "base64-serde",
- "hex",
- "num-derive",
- "num-traits",
- "serde",
-]
-
 [[package]]
 name = "zerotier-service"
 version = "0.1.0"
@@ -961,5 +935,4 @@ dependencies = [
  "socket2",
  "tokio",
  "winapi",
- "zerotier-core",
 ]

service/Cargo.toml

@@ -12,7 +12,6 @@ codegen-units = 1
 panic = 'abort'
 
 [dependencies]
-zerotier-core = { path = "../rust-zerotier-core" }
 num_cpus = "*"
 tokio = { version = "1", features = ["rt", "net", "time", "signal", "macros"] }
 serde = { version = "1", features = ["derive"] }
@@ -29,6 +28,7 @@ socket2 = { version = "0", features = ["reuseport", "unix", "pair"] }
 dialoguer = "0"
 digest_auth = "0.2.4"
 colored = "2"
+#zerotier-core = { path = "../rust-zerotier-core" }
 
 [target."cfg(windows)".dependencies]
 winapi = { version = "0.3.9", features = ["handleapi", "ws2ipdef", "ws2tcpip"] }