keepalive work

veilid-core/src/network_manager/tasks.rs

@@ -336,16 +336,34 @@ impl NetworkManager {
         let mut unord = FuturesUnordered::new();
 
         let node_refs = routing_table.get_nodes_needing_ping(cur_ts, relay_node_id);
+        let mut mapped_port_info = routing_table.get_mapped_port_info();
+
         for nr in node_refs {
             let rpc = rpc.clone();
             if Some(nr.node_id()) == relay_node_id {
                 // Relay nodes get pinged over all protocols we have inbound dialinfo for
                 // This is so we can preserve the inbound NAT mappings at our router
                 for did in &dids {
-                    let rpc = rpc.clone();
-                    let dif = did.dial_info.make_filter(true);
-                    let nr_filtered = nr.filtered_clone(dif);
-                    unord.push(async move { rpc.rpc_call_status(nr_filtered).await }.boxed());
+                    // Do we need to do this ping?
+                    let pt = did.dial_info.protocol_type();
+                    let at = did.dial_info.address_type();
+
+                    let needs_ping = if let Some((llpt, port)) =
+                        mapped_port_info.protocol_to_port.get(&(pt, at))
+                    {
+                        mapped_port_info
+                            .low_level_protocol_ports
+                            .remove(&(*llpt, at, *port))
+                    } else {
+                        false
+                    };
+                    if needs_ping {
+                        let rpc = rpc.clone();
+                        let dif = did.dial_info.make_filter(true);
+                        let nr_filtered = nr.filtered_clone(dif);
+                        log_net!("--> Keepalive ping to {:?}", nr_filtered);
+                        unord.push(async move { rpc.rpc_call_status(nr_filtered).await }.boxed());
+                    }
                 }
             } else {
                 // Just do a single ping with the best protocol for all the other nodes

veilid-core/src/routing_table/find_nodes.rs

@@ -4,6 +4,14 @@ use crate::dht::*;
 use crate::xx::*;
 use crate::*;
 
+pub type LowLevelProtocolPorts = BTreeSet<(LowLevelProtocolType, AddressType, u16)>;
+pub type ProtocolToPortMapping = BTreeMap<(ProtocolType, AddressType), (LowLevelProtocolType, u16)>;
+#[derive(Clone, Debug)]
+pub struct MappedPortInfo {
+    pub low_level_protocol_ports: LowLevelProtocolPorts,
+    pub protocol_to_port: ProtocolToPortMapping,
+}
+
 impl RoutingTable {
     // Makes a filter that finds nodes with a matching inbound dialinfo
     pub fn make_inbound_dial_info_entry_filter(
@@ -383,12 +391,46 @@ impl RoutingTable {
         out
     }
 
+    // Build a map of protocols to low level ports
+    // This way we can get the set of protocols required to keep our NAT mapping alive for keepalive pings
+    // Only one protocol per low level protocol/port combination is required
+    // For example, if WS/WSS and TCP protocols are on the same low-level TCP port, only TCP keepalives will be required
+    // and we do not need to do WS/WSS keepalive as well. If they are on different ports, then we will need WS/WSS keepalives too.
+    pub fn get_mapped_port_info(&self) -> MappedPortInfo {
+        let mut low_level_protocol_ports =
+            BTreeSet::<(LowLevelProtocolType, AddressType, u16)>::new();
+        let mut protocol_to_port =
+            BTreeMap::<(ProtocolType, AddressType), (LowLevelProtocolType, u16)>::new();
+        let our_dids = self.all_filtered_dial_info_details(
+            Some(RoutingDomain::PublicInternet),
+            &DialInfoFilter::all(),
+        );
+        for did in our_dids {
+            low_level_protocol_ports.insert((
+                did.dial_info.protocol_type().low_level_protocol_type(),
+                did.dial_info.address_type(),
+                did.dial_info.socket_address().port(),
+            ));
+            protocol_to_port.insert(
+                (did.dial_info.protocol_type(), did.dial_info.address_type()),
+                (
+                    did.dial_info.protocol_type().low_level_protocol_type(),
+                    did.dial_info.socket_address().port(),
+                ),
+            );
+        }
+        MappedPortInfo {
+            low_level_protocol_ports,
+            protocol_to_port,
+        }
+    }
+
     fn make_relay_node_filter(&self) -> impl Fn(&BucketEntryInner) -> bool {
         // Get all our outbound protocol/address types
-        let protocol_config = self.network_manager().get_protocol_config();
         let outbound_dif = self
             .network_manager()
             .get_outbound_dial_info_filter(RoutingDomain::PublicInternet);
+        let mapped_port_info = self.get_mapped_port_info();
 
         move |e: &BucketEntryInner| {
             // Ensure this node is not on our local network
@@ -400,29 +442,24 @@ impl RoutingTable {
                 return false;
             }
 
-            // Disqualify nodes that don't have all our outbound protocol types
+            // Disqualify nodes that don't cover all our inbound ports for tcp and udp
+            // as we need to be able to use the relay for keepalives for all nat mappings
+            let mut low_level_protocol_ports = mapped_port_info.low_level_protocol_ports.clone();
+
             let can_serve_as_relay = e
                 .node_info()
                 .map(|n| {
                     let dids =
                         n.all_filtered_dial_info_details(|did| did.matches_filter(&outbound_dif));
-                    for pt in protocol_config.outbound {
-                        for at in protocol_config.family_global {
-                            let mut found = false;
-                            for did in &dids {
-                                if did.dial_info.protocol_type() == pt
-                                    && did.dial_info.address_type() == at
-                                {
-                                    found = true;
-                                    break;
-                                }
-                            }
-                            if !found {
-                                return false;
-                            }
+                    for did in &dids {
+                        let pt = did.dial_info.protocol_type();
+                        let at = did.dial_info.address_type();
+                        if let Some((llpt, port)) = mapped_port_info.protocol_to_port.get(&(pt, at))
+                        {
+                            low_level_protocol_ports.remove(&(*llpt, at, *port));
                         }
                     }
-                    true
+                    low_level_protocol_ports.is_empty()
                 })
                 .unwrap_or(false);
             if !can_serve_as_relay {

veilid-core/src/veilid_api/mod.rs

@@ -539,6 +539,22 @@ impl LocalNodeInfo {
     }
 }
 
+#[allow(clippy::derive_hash_xor_eq)]
+#[derive(Debug, PartialOrd, Ord, Hash, Serialize, Deserialize, EnumSetType)]
+// Keep member order appropriate for sorting < preference
+// Must match DialInfo order
+pub enum LowLevelProtocolType {
+    UDP,
+    TCP,
+}
+
+impl LowLevelProtocolType {
+    pub fn is_connection_oriented(&self) -> bool {
+        matches!(self, LowLevelProtocolType::TCP)
+    }
+}
+pub type LowLevelProtocolTypeSet = EnumSet<LowLevelProtocolType>;
+
 #[allow(clippy::derive_hash_xor_eq)]
 #[derive(Debug, PartialOrd, Ord, Hash, Serialize, Deserialize, EnumSetType)]
 // Keep member order appropriate for sorting < preference
@@ -557,6 +573,12 @@ impl ProtocolType {
             ProtocolType::TCP | ProtocolType::WS | ProtocolType::WSS
         )
     }
+    pub fn low_level_protocol_type(&self) -> LowLevelProtocolType {
+        match self {
+            ProtocolType::UDP => LowLevelProtocolType::UDP,
+            ProtocolType::TCP | ProtocolType::WS | ProtocolType::WSS => LowLevelProtocolType::TCP,
+        }
+    }
 }
 pub type ProtocolTypeSet = EnumSet<ProtocolType>;