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Peer Diversity in the Routing Table (ipfs#658)
* Peer Diversity in the DHT
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| package dht | ||
|
|
||
| import ( | ||
| "github.com/libp2p/go-libp2p-core/host" | ||
| "github.com/libp2p/go-libp2p-core/peer" | ||
| "github.com/libp2p/go-libp2p-kbucket/peerdiversity" | ||
| ma "github.com/multiformats/go-multiaddr" | ||
| "sync" | ||
| ) | ||
|
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| var _ peerdiversity.PeerIPGroupFilter = (*rtPeerIPGroupFilter)(nil) | ||
|
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| type rtPeerIPGroupFilter struct { | ||
| mu sync.RWMutex | ||
| h host.Host | ||
|
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| maxPerCpl int | ||
| maxForTable int | ||
|
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| cplIpGroupCount map[int]map[peerdiversity.PeerIPGroupKey]int | ||
| tableIpGroupCount map[peerdiversity.PeerIPGroupKey]int | ||
| } | ||
|
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| // NewRTPeerDiversityFilter constructs the `PeerIPGroupFilter` that will be used to configure | ||
| // the diversity filter for the Routing Table. | ||
| // Please see the docs for `peerdiversity.PeerIPGroupFilter` AND `peerdiversity.Filter` for more details. | ||
| func NewRTPeerDiversityFilter(h host.Host, maxPerCpl, maxForTable int) *rtPeerIPGroupFilter { | ||
| return &rtPeerIPGroupFilter{ | ||
| h: h, | ||
|
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| maxPerCpl: maxPerCpl, | ||
| maxForTable: maxForTable, | ||
|
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| cplIpGroupCount: make(map[int]map[peerdiversity.PeerIPGroupKey]int), | ||
| tableIpGroupCount: make(map[peerdiversity.PeerIPGroupKey]int), | ||
| } | ||
|
|
||
| } | ||
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| func (r *rtPeerIPGroupFilter) Allow(g peerdiversity.PeerGroupInfo) bool { | ||
| r.mu.RLock() | ||
| defer r.mu.RUnlock() | ||
|
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| key := g.IPGroupKey | ||
| cpl := g.Cpl | ||
|
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| if r.tableIpGroupCount[key] >= r.maxForTable { | ||
|
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| return false | ||
| } | ||
|
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| c, ok := r.cplIpGroupCount[cpl] | ||
| allow := !ok || c[key] < r.maxPerCpl | ||
| return allow | ||
| } | ||
|
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| func (r *rtPeerIPGroupFilter) Increment(g peerdiversity.PeerGroupInfo) { | ||
| r.mu.Lock() | ||
| defer r.mu.Unlock() | ||
|
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| key := g.IPGroupKey | ||
| cpl := g.Cpl | ||
|
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| r.tableIpGroupCount[key] = r.tableIpGroupCount[key] + 1 | ||
| if _, ok := r.cplIpGroupCount[cpl]; !ok { | ||
| r.cplIpGroupCount[cpl] = make(map[peerdiversity.PeerIPGroupKey]int) | ||
| } | ||
|
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| r.cplIpGroupCount[cpl][key] = r.cplIpGroupCount[cpl][key] + 1 | ||
| } | ||
|
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| func (r *rtPeerIPGroupFilter) Decrement(g peerdiversity.PeerGroupInfo) { | ||
| r.mu.Lock() | ||
| defer r.mu.Unlock() | ||
|
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| key := g.IPGroupKey | ||
| cpl := g.Cpl | ||
|
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| r.tableIpGroupCount[key] = r.tableIpGroupCount[key] - 1 | ||
| if r.tableIpGroupCount[key] == 0 { | ||
| delete(r.tableIpGroupCount, key) | ||
| } | ||
|
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| r.cplIpGroupCount[cpl][key] = r.cplIpGroupCount[cpl][key] - 1 | ||
| if r.cplIpGroupCount[cpl][key] == 0 { | ||
| delete(r.cplIpGroupCount[cpl], key) | ||
| } | ||
| if len(r.cplIpGroupCount[cpl]) == 0 { | ||
| delete(r.cplIpGroupCount, cpl) | ||
| } | ||
| } | ||
|
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||
| func (r *rtPeerIPGroupFilter) PeerAddresses(p peer.ID) []ma.Multiaddr { | ||
| cs := r.h.Network().ConnsToPeer(p) | ||
| addr := make([]ma.Multiaddr, 0, len(cs)) | ||
| for _, c := range cs { | ||
| addr = append(addr, c.RemoteMultiaddr()) | ||
| } | ||
| return addr | ||
| } |
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