67 lines
1.5 KiB
Go
67 lines
1.5 KiB
Go
package p2p
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import (
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"context"
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"fmt"
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"time"
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dht "github.com/libp2p/go-libp2p-kad-dht"
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"github.com/libp2p/go-libp2p/core/host"
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"github.com/libp2p/go-libp2p/core/network"
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"github.com/libp2p/go-libp2p/core/peer"
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)
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var discoverNow = make(chan bool)
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// Discover starts up a DHT based discovery system finding and adding nodes with the same rendezvous string.
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func Discover(ctx context.Context, h host.Host, dht *dht.IpfsDHT, peerTable map[string]peer.ID) {
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dur := time.Second * 1
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ticker := time.NewTicker(dur)
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defer ticker.Stop()
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for {
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select {
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case <-ctx.Done():
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return
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case <-discoverNow:
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dur = time.Second * 1
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// Immediately trigger discovery
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ticker.Reset(time.Millisecond * 1)
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case <-ticker.C:
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connectedToAny := false
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for _, id := range peerTable {
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if h.Network().Connectedness(id) != network.Connected {
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addrs, err := dht.FindPeer(ctx, id)
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if err != nil {
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continue
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}
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_, err = h.Network().DialPeer(ctx, addrs.ID)
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if err != nil {
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continue
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}
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connectedToAny = true
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} else {
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connectedToAny = true
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}
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}
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if !connectedToAny {
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fmt.Println("[!] Not connected to any peers, attempting to bootstrap again")
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dht.Bootstrap(ctx)
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dht.RefreshRoutingTable()
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dur = time.Second * 1
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ticker.Reset(dur)
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} else {
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dur = dur * 2
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if dur >= time.Second*60 {
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dur = time.Second * 60
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}
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ticker.Reset(dur)
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}
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}
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}
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}
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func Rediscover() {
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discoverNow <- true
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}
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