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consume identify events to evaluate routing table addition. (#365)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,90 @@ | ||
| package dht | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| "github.com/jbenet/goprocess" | ||
| goprocessctx "github.com/jbenet/goprocess/context" | ||
| "github.com/libp2p/go-libp2p-core/event" | ||
| "github.com/libp2p/go-libp2p-core/network" | ||
| ma "github.com/multiformats/go-multiaddr" | ||
| ) | ||
|
|
||
| // subscriberNotifee implements network.Notifee and also manages the subscriber to the event bus. We consume peer | ||
| // identification events to trigger inclusion in the routing table, and we consume Disconnected events to eject peers | ||
| // from it. | ||
| type subscriberNotifee IpfsDHT | ||
|
|
||
| func (nn *subscriberNotifee) DHT() *IpfsDHT { | ||
| return (*IpfsDHT)(nn) | ||
| } | ||
|
|
||
| func (nn *subscriberNotifee) Process(ctx context.Context) goprocess.Process { | ||
| proc := goprocessctx.WithContext(ctx) | ||
| proc.Go(nn.subscribe) | ||
| return proc | ||
| } | ||
|
|
||
| func (nn *subscriberNotifee) subscribe(proc goprocess.Process) { | ||
| dht := nn.DHT() | ||
| for { | ||
| select { | ||
| case evt, more := <-dht.subscriptions.evtPeerIdentification.Out(): | ||
| if !more { | ||
| return | ||
| } | ||
| switch ev := evt.(type) { | ||
| case event.EvtPeerIdentificationCompleted: | ||
| protos, err := dht.peerstore.SupportsProtocols(ev.Peer, dht.protocolStrs()...) | ||
| if err == nil && len(protos) != 0 { | ||
| dht.Update(dht.ctx, ev.Peer) | ||
| } | ||
| } | ||
| case <-proc.Closing(): | ||
| return | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func (nn *subscriberNotifee) Disconnected(n network.Network, v network.Conn) { | ||
| dht := nn.DHT() | ||
| select { | ||
| case <-dht.Process().Closing(): | ||
| return | ||
| default: | ||
| } | ||
|
|
||
| p := v.RemotePeer() | ||
|
|
||
| // Lock and check to see if we're still connected. We lock to make sure | ||
| // we don't concurrently process a connect event. | ||
| dht.plk.Lock() | ||
| defer dht.plk.Unlock() | ||
| if dht.host.Network().Connectedness(p) == network.Connected { | ||
| // We're still connected. | ||
| return | ||
| } | ||
|
|
||
| dht.routingTable.Remove(p) | ||
|
|
||
| dht.smlk.Lock() | ||
| defer dht.smlk.Unlock() | ||
| ms, ok := dht.strmap[p] | ||
| if !ok { | ||
| return | ||
| } | ||
| delete(dht.strmap, p) | ||
|
|
||
| // Do this asynchronously as ms.lk can block for a while. | ||
| go func() { | ||
| ms.lk.Lock() | ||
| defer ms.lk.Unlock() | ||
| ms.invalidate() | ||
| }() | ||
| } | ||
|
|
||
| func (nn *subscriberNotifee) Connected(n network.Network, v network.Conn) {} | ||
| func (nn *subscriberNotifee) OpenedStream(n network.Network, v network.Stream) {} | ||
| func (nn *subscriberNotifee) ClosedStream(n network.Network, v network.Stream) {} | ||
| func (nn *subscriberNotifee) Listen(n network.Network, a ma.Multiaddr) {} | ||
| func (nn *subscriberNotifee) ListenClose(n network.Network, a ma.Multiaddr) {} |