github.com/linapex/ethereum-go-chinese@v0.0.0-20190316121929-f8b7a73c3fa1/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 19:16:43</date>
    10  //</624450114483654656>
    11  
    12  
    13  package simulation
    14  
    15  import (
    16  	"context"
    17  	"encoding/hex"
    18  	"time"
    19  
    20  	"github.com/ethereum/go-ethereum/common"
    21  	"github.com/ethereum/go-ethereum/log"
    22  	"github.com/ethereum/go-ethereum/p2p/enode"
    23  	"github.com/ethereum/go-ethereum/swarm/network"
    24  )
    25  
    26  //BucketkeyKademlia是用于存储Kademlia的密钥
    27  //特定节点的实例，通常位于servicefunc函数内部。
    28  var BucketKeyKademlia BucketKey = "kademlia"
    29  
    30  //等到所有花环的健康都是真实的时候，Waittillhealthy才会停止。
    31  //如果错误不为零，则返回发现不健康的卡德米利亚地图。
    32  //TODO:检查Kademilia深度计算逻辑更改后的正确性
    33  func (s *Simulation) WaitTillHealthy(ctx context.Context) (ill map[enode.ID]*network.Kademlia, err error) {
    34  //准备Peerpot地图检查卡德米利亚健康
    35  	var ppmap map[string]*network.PeerPot
    36  	kademlias := s.kademlias()
    37  	addrs := make([][]byte, 0, len(kademlias))
    38  //要验证所有花冠是否具有相同的参数
    39  	for _, k := range kademlias {
    40  		addrs = append(addrs, k.BaseAddr())
    41  	}
    42  	ppmap = network.NewPeerPotMap(s.neighbourhoodSize, addrs)
    43  
    44  //在检查文件之前，在每个节点上等待健康的kademlia
    45  	ticker := time.NewTicker(200 * time.Millisecond)
    46  	defer ticker.Stop()
    47  
    48  	ill = make(map[enode.ID]*network.Kademlia)
    49  	for {
    50  		select {
    51  		case <-ctx.Done():
    52  			return ill, ctx.Err()
    53  		case <-ticker.C:
    54  			for k := range ill {
    55  				delete(ill, k)
    56  			}
    57  			log.Debug("kademlia health check", "addr count", len(addrs))
    58  			for id, k := range kademlias {
    59  //此节点的Peerpot
    60  				addr := common.Bytes2Hex(k.BaseAddr())
    61  				pp := ppmap[addr]
    62  //调用健康的RPC
    63  				h := k.Healthy(pp)
    64  //打印信息
    65  				log.Debug(k.String())
    66  				log.Debug("kademlia", "connectNN", h.ConnectNN, "knowNN", h.KnowNN)
    67  				log.Debug("kademlia", "health", h.ConnectNN && h.KnowNN, "addr", hex.EncodeToString(k.BaseAddr()), "node", id)
    68  				log.Debug("kademlia", "ill condition", !h.ConnectNN, "addr", hex.EncodeToString(k.BaseAddr()), "node", id)
    69  				if !h.ConnectNN {
    70  					ill[id] = k
    71  				}
    72  			}
    73  			if len(ill) == 0 {
    74  				return nil, nil
    75  			}
    76  		}
    77  	}
    78  }
    79  
    80  //Kademlias返回设置的所有Kademlia实例
    81  //在模拟桶中。
    82  func (s *Simulation) kademlias() (ks map[enode.ID]*network.Kademlia) {
    83  	items := s.UpNodesItems(BucketKeyKademlia)
    84  	ks = make(map[enode.ID]*network.Kademlia, len(items))
    85  	for id, v := range items {
    86  		k, ok := v.(*network.Kademlia)
    87  		if !ok {
    88  			continue
    89  		}
    90  		ks[id] = k
    91  	}
    92  	return ks
    93  }
    94