93 lines
2.7 KiB
Go
93 lines
2.7 KiB
Go
// Copyright (C) 2019 Storj Labs, Inc.
|
|
// See LICENSE for copying information.
|
|
|
|
package kademlia
|
|
|
|
import (
|
|
"context"
|
|
"sync/atomic"
|
|
|
|
"github.com/zeebo/errs"
|
|
"go.uber.org/zap"
|
|
|
|
"storj.io/storj/pkg/pb"
|
|
)
|
|
|
|
// EndpointError defines errors class for Endpoint
|
|
var EndpointError = errs.Class("kademlia endpoint error")
|
|
|
|
// Endpoint implements the kademlia Endpoints
|
|
type Endpoint struct {
|
|
log *zap.Logger
|
|
service *Kademlia
|
|
routingTable *RoutingTable
|
|
connected int32
|
|
}
|
|
|
|
// NewEndpoint returns a new kademlia endpoint
|
|
func NewEndpoint(log *zap.Logger, service *Kademlia, routingTable *RoutingTable) *Endpoint {
|
|
return &Endpoint{
|
|
service: service,
|
|
routingTable: routingTable,
|
|
log: log,
|
|
}
|
|
}
|
|
|
|
// Query is a node to node communication query
|
|
func (endpoint *Endpoint) Query(ctx context.Context, req *pb.QueryRequest) (*pb.QueryResponse, error) {
|
|
endpoint.service.Queried()
|
|
|
|
if req.GetPingback() {
|
|
endpoint.pingback(ctx, req.Sender)
|
|
}
|
|
|
|
nodes, err := endpoint.routingTable.FindNear(req.Target.Id, int(req.Limit))
|
|
if err != nil {
|
|
return &pb.QueryResponse{}, EndpointError.New("could not find near endpoint: %v", err)
|
|
}
|
|
|
|
return &pb.QueryResponse{Sender: req.Sender, Response: nodes}, nil
|
|
}
|
|
|
|
// pingback implements pingback for queries
|
|
func (endpoint *Endpoint) pingback(ctx context.Context, target *pb.Node) {
|
|
_, err := endpoint.service.Ping(ctx, *target)
|
|
if err != nil {
|
|
endpoint.log.Debug("connection to node failed", zap.Error(err), zap.String("nodeID", target.Id.String()))
|
|
err = endpoint.routingTable.ConnectionFailed(target)
|
|
if err != nil {
|
|
endpoint.log.Error("could not respond to connection failed", zap.Error(err))
|
|
}
|
|
} else {
|
|
err = endpoint.routingTable.ConnectionSuccess(target)
|
|
if err != nil {
|
|
endpoint.log.Error("could not respond to connection success", zap.Error(err))
|
|
} else {
|
|
count := atomic.AddInt32(&endpoint.connected, 1)
|
|
if count == 1 {
|
|
endpoint.log.Sugar().Debugf("Successfully connected with %s", target.Address.Address)
|
|
} else if count%100 == 0 {
|
|
endpoint.log.Sugar().Debugf("Successfully connected with %s %dx times", target.Address.Address, count)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Ping provides an easy way to verify a node is online and accepting requests
|
|
func (endpoint *Endpoint) Ping(ctx context.Context, req *pb.PingRequest) (*pb.PingResponse, error) {
|
|
endpoint.service.Pinged()
|
|
return &pb.PingResponse{}, nil
|
|
}
|
|
|
|
// RequestInfo returns the node info
|
|
func (endpoint *Endpoint) RequestInfo(ctx context.Context, req *pb.InfoRequest) (*pb.InfoResponse, error) {
|
|
self := endpoint.service.Local()
|
|
|
|
return &pb.InfoResponse{
|
|
Type: self.Type,
|
|
Operator: &self.Operator,
|
|
Capacity: &self.Capacity,
|
|
Version: &self.Version,
|
|
}, nil
|
|
}
|