github.com/linapex/ethereum-dpos-chinese@v0.0.0-20190316121959-b78b3a4a1ece/swarm/network/simulation/kademlia.go (about)

     1  
     2  //<developer>
     3  //    <name>linapex 曹一峰</name>
     4  //    <email>linapex@163.com</email>
     5  //    <wx>superexc</wx>
     6  //    <qqgroup>128148617</qqgroup>
     7  //    <url>https://jsq.ink</url>
     8  //    <role>pku engineer</role>
     9  //    <date>2019-03-16 12:09:47</date>
    10  //</624342673888645120>
    11  
    12  //
    13  //
    14  //
    15  //
    16  //
    17  //
    18  //
    19  //
    20  //
    21  //
    22  //
    23  //
    24  //
    25  //
    26  //
    27  
    28  package simulation
    29  
    30  import (
    31  	"context"
    32  	"encoding/hex"
    33  	"time"
    34  
    35  	"github.com/ethereum/go-ethereum/p2p/discover"
    36  
    37  	"github.com/ethereum/go-ethereum/common"
    38  	"github.com/ethereum/go-ethereum/log"
    39  	"github.com/ethereum/go-ethereum/swarm/network"
    40  )
    41  
    42  //
    43  //
    44  var BucketKeyKademlia BucketKey = "kademlia"
    45  
    46  //
    47  //
    48  func (s *Simulation) WaitTillHealthy(ctx context.Context, kadMinProxSize int) (ill map[discover.NodeID]*network.Kademlia, err error) {
    49  //
    50  	var ppmap map[string]*network.PeerPot
    51  	kademlias := s.kademlias()
    52  	addrs := make([][]byte, 0, len(kademlias))
    53  	for _, k := range kademlias {
    54  		addrs = append(addrs, k.BaseAddr())
    55  	}
    56  	ppmap = network.NewPeerPotMap(kadMinProxSize, addrs)
    57  
    58  //
    59  	ticker := time.NewTicker(200 * time.Millisecond)
    60  	defer ticker.Stop()
    61  
    62  	ill = make(map[discover.NodeID]*network.Kademlia)
    63  	for {
    64  		select {
    65  		case <-ctx.Done():
    66  			return ill, ctx.Err()
    67  		case <-ticker.C:
    68  			for k := range ill {
    69  				delete(ill, k)
    70  			}
    71  			log.Debug("kademlia health check", "addr count", len(addrs))
    72  			for id, k := range kademlias {
    73  //
    74  				addr := common.Bytes2Hex(k.BaseAddr())
    75  				pp := ppmap[addr]
    76  //
    77  				h := k.Healthy(pp)
    78  //
    79  				log.Debug(k.String())
    80  				log.Debug("kademlia", "empty bins", pp.EmptyBins, "gotNN", h.GotNN, "knowNN", h.KnowNN, "full", h.Full)
    81  				log.Debug("kademlia", "health", h.GotNN && h.KnowNN && h.Full, "addr", hex.EncodeToString(k.BaseAddr()), "node", id)
    82  				log.Debug("kademlia", "ill condition", !h.GotNN || !h.Full, "addr", hex.EncodeToString(k.BaseAddr()), "node", id)
    83  				if !h.GotNN || !h.Full {
    84  					ill[id] = k
    85  				}
    86  			}
    87  			if len(ill) == 0 {
    88  				return nil, nil
    89  			}
    90  		}
    91  	}
    92  }
    93  
    94  //
    95  //
    96  func (s *Simulation) kademlias() (ks map[discover.NodeID]*network.Kademlia) {
    97  	items := s.UpNodesItems(BucketKeyKademlia)
    98  	ks = make(map[discover.NodeID]*network.Kademlia, len(items))
    99  	for id, v := range items {
   100  		k, ok := v.(*network.Kademlia)
   101  		if !ok {
   102  			continue
   103  		}
   104  		ks[id] = k
   105  	}
   106  	return ks
   107  }
   108