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handle peer port correctly

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This commit is contained in:
Alex Grintsvayg 2018-07-13 13:31:54 -04:00
parent 283ec46bd5
commit f068daf0b8
9 changed files with 76 additions and 57 deletions
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33
dht/contact.go
View file

@ -3,6 +3,7 @@ package dht
import ( import (
"bytes" "bytes"
"net" "net"
"strconv"
"github.com/lbryio/lbry.go/errors" "github.com/lbryio/lbry.go/errors"
"github.com/lbryio/reflector.go/dht/bits" "github.com/lbryio/reflector.go/dht/bits"
@ -12,44 +13,47 @@ import (
// TODO: if routing table is ever empty (aka the node is isolated), it should re-bootstrap // TODO: if routing table is ever empty (aka the node is isolated), it should re-bootstrap
// TODO: use a tree with bucket splitting instead of a fixed bucket list. include jack's optimization (see link in commit mesg) // Contact contains information for contacting another node on the network
// https://github.com/lbryio/lbry/pull/1211/commits/341b27b6d21ac027671d42458826d02735aaae41
// Contact is a type representation of another node that a specific node is in communication with.
type Contact struct { type Contact struct {
ID bits.Bitmap ID bits.Bitmap
IP net.IP IP net.IP
Port int Port int
PeerPort int
} }
// Equals returns T/F if two contacts are the same. // Equals returns true if two contacts are the same.
func (c Contact) Equals(other Contact, checkID bool) bool { func (c Contact) Equals(other Contact, checkID bool) bool {
return c.IP.Equal(other.IP) && c.Port == other.Port && (!checkID || c.ID == other.ID) return c.IP.Equal(other.IP) && c.Port == other.Port && (!checkID || c.ID == other.ID)
} }
// Addr returns the UPD Address of the contact. // Addr returns the address of the contact.
func (c Contact) Addr() *net.UDPAddr { func (c Contact) Addr() *net.UDPAddr {
return &net.UDPAddr{IP: c.IP, Port: c.Port} return &net.UDPAddr{IP: c.IP, Port: c.Port}
} }
// String returns the concatenated short hex encoded string of its ID + @ + string represention of its UPD Address. // String returns a short string representation of the contact
func (c Contact) String() string { func (c Contact) String() string {
return c.ID.HexShort() + "@" + c.Addr().String() str := c.ID.HexShort() + "@" + c.Addr().String()
if c.PeerPort != 0 {
str += "(" + strconv.Itoa(c.PeerPort) + ")"
}
return str
} }
// MarshalCompact returns the compact byte slice representation of a contact. // MarshalCompact returns a compact byteslice representation of the contact
// NOTE: The compact representation always uses the tcp PeerPort, not the udp Port. This is dumb, but that's how the python daemon does it
func (c Contact) MarshalCompact() ([]byte, error) { func (c Contact) MarshalCompact() ([]byte, error) {
if c.IP.To4() == nil { if c.IP.To4() == nil {
return nil, errors.Err("ip not set") return nil, errors.Err("ip not set")
} }
if c.Port < 0 || c.Port > 65535 { if c.PeerPort < 0 || c.PeerPort > 65535 {
return nil, errors.Err("invalid port") return nil, errors.Err("invalid port")
} }
var buf bytes.Buffer var buf bytes.Buffer
buf.Write(c.IP.To4()) buf.Write(c.IP.To4())
buf.WriteByte(byte(c.Port >> 8)) buf.WriteByte(byte(c.PeerPort >> 8))
buf.WriteByte(byte(c.Port)) buf.WriteByte(byte(c.PeerPort))
buf.Write(c.ID[:]) buf.Write(c.ID[:])
if buf.Len() != compactNodeInfoLength { if buf.Len() != compactNodeInfoLength {
@ -59,13 +63,14 @@ func (c Contact) MarshalCompact() ([]byte, error) {
return buf.Bytes(), nil return buf.Bytes(), nil
} }
// UnmarshalCompact unmarshals the compact byte slice representation of a contact. // UnmarshalCompact unmarshals the compact byteslice representation of a contact.
// NOTE: The compact representation always uses the tcp PeerPort, not the udp Port. This is dumb, but that's how the python daemon does it
func (c *Contact) UnmarshalCompact(b []byte) error { func (c *Contact) UnmarshalCompact(b []byte) error {
if len(b) != compactNodeInfoLength { if len(b) != compactNodeInfoLength {
return errors.Err("invalid compact length") return errors.Err("invalid compact length")
} }
c.IP = net.IPv4(b[0], b[1], b[2], b[3]).To4() c.IP = net.IPv4(b[0], b[1], b[2], b[3]).To4()
c.Port = int(uint16(b[5]) | uint16(b[4])<<8) c.PeerPort = int(uint16(b[5]) | uint16(b[4])<<8)
c.ID = bits.FromBytesP(b[6:]) c.ID = bits.FromBytesP(b[6:])
return nil return nil
} }

2
dht/contact_test.go
View file

@ -12,7 +12,7 @@ func TestCompactEncoding(t *testing.T) {
c := Contact{ c := Contact{
ID: bits.FromHexP("1c8aff71b99462464d9eeac639595ab99664be3482cb91a29d87467515c7d9158fe72aa1f1582dab07d8f8b5db277f41"), ID: bits.FromHexP("1c8aff71b99462464d9eeac639595ab99664be3482cb91a29d87467515c7d9158fe72aa1f1582dab07d8f8b5db277f41"),
IP: net.ParseIP("1.2.3.4"), IP: net.ParseIP("1.2.3.4"),
Port: int(55<<8 + 66), PeerPort: int(55<<8 + 66),
} }
var compact []byte var compact []byte

1
dht/dht.go
View file

@ -318,6 +318,7 @@ func (dht *DHT) startReannouncer() {
func (dht *DHT) storeOnNode(hash bits.Bitmap, c Contact) { func (dht *DHT) storeOnNode(hash bits.Bitmap, c Contact) {
// self-store // self-store
if dht.contact.ID == c.ID { if dht.contact.ID == c.ID {
c.PeerPort = dht.conf.PeerProtocolPort
dht.node.Store(hash, c) dht.node.Store(hash, c)
return return
} }

12
dht/dht_test.go
View file

@ -10,6 +10,10 @@ import (
) )
func TestNodeFinder_FindNodes(t *testing.T) { func TestNodeFinder_FindNodes(t *testing.T) {
if testing.Short() {
t.Skip("skipping slow nodeFinder test")
}
bs, dhts := TestingCreateDHT(t, 3, true, false) bs, dhts := TestingCreateDHT(t, 3, true, false)
defer func() { defer func() {
for i := range dhts { for i := range dhts {
@ -73,6 +77,10 @@ func TestNodeFinder_FindNodes_NoBootstrap(t *testing.T) {
} }
func TestNodeFinder_FindValue(t *testing.T) { func TestNodeFinder_FindValue(t *testing.T) {
if testing.Short() {
t.Skip("skipping slow nodeFinder test")
}
bs, dhts := TestingCreateDHT(t, 3, true, false) bs, dhts := TestingCreateDHT(t, 3, true, false)
defer func() { defer func() {
for i := range dhts { for i := range dhts {
@ -104,6 +112,10 @@ func TestNodeFinder_FindValue(t *testing.T) {
} }
func TestDHT_LargeDHT(t *testing.T) { func TestDHT_LargeDHT(t *testing.T) {
if testing.Short() {
t.Skip("skipping large DHT test")
}
nodes := 100 nodes := 100
bs, dhts := TestingCreateDHT(t, nodes, true, true) bs, dhts := TestingCreateDHT(t, nodes, true, true)
defer func() { defer func() {

8
dht/message.go
View file

@ -44,7 +44,7 @@ const (
protocolVersionField = "protocolVersion" protocolVersionField = "protocolVersion"
) )
// Message is an extension of the bencode marshalling interface for serialized message passing. // Message is a DHT message
type Message interface { type Message interface {
bencode.Marshaler bencode.Marshaler
} }
@ -82,7 +82,7 @@ func newMessageID() messageID {
return m return m
} }
// Request represents the structured request from one node to another. // Request represents a DHT request message
type Request struct { type Request struct {
ID messageID ID messageID
NodeID bits.Bitmap NodeID bits.Bitmap
@ -261,7 +261,7 @@ func (s *storeArgs) UnmarshalBencode(b []byte) error {
return nil return nil
} }
// Response represents the structured response one node returns to another. // Response represents a DHT response message
type Response struct { type Response struct {
ID messageID ID messageID
NodeID bits.Bitmap NodeID bits.Bitmap
@ -416,7 +416,7 @@ func (r *Response) UnmarshalBencode(b []byte) error {
return nil return nil
} }
// Error represents an error message that is returned from one node to another in communication. // Error represents a DHT error response
type Error struct { type Error struct {
ID messageID ID messageID
NodeID bits.Bitmap NodeID bits.Bitmap

4
dht/message_test.go
View file

@ -103,9 +103,9 @@ func TestBencodeFindValueResponse(t *testing.T) {
ID: newMessageID(), ID: newMessageID(),
NodeID: bits.Rand(), NodeID: bits.Rand(),
FindValueKey: bits.Rand().RawString(), FindValueKey: bits.Rand().RawString(),
Token: "arst", Token: "arstarstarst",
Contacts: []Contact{ Contacts: []Contact{
{ID: bits.Rand(), IP: net.IPv4(1, 2, 3, 4).To4(), Port: 5678}, {ID: bits.Rand(), IP: net.IPv4(1, 2, 3, 4).To4(), PeerPort: 8765},
}, },
} }

2
dht/node.go
View file

@ -236,7 +236,7 @@ func (n *Node) handleRequest(addr *net.UDPAddr, request Request) {
// TODO: we should be sending the IP in the request, not just using the sender's IP // TODO: we should be sending the IP in the request, not just using the sender's IP
// TODO: should we be using StoreArgs.NodeID or StoreArgs.Value.LbryID ??? // TODO: should we be using StoreArgs.NodeID or StoreArgs.Value.LbryID ???
if n.tokens.Verify(request.StoreArgs.Value.Token, request.NodeID, addr) { if n.tokens.Verify(request.StoreArgs.Value.Token, request.NodeID, addr) {
n.Store(request.StoreArgs.BlobHash, Contact{ID: request.StoreArgs.NodeID, IP: addr.IP, Port: request.StoreArgs.Value.Port}) n.Store(request.StoreArgs.BlobHash, Contact{ID: request.StoreArgs.NodeID, IP: addr.IP, Port: addr.Port, PeerPort: request.StoreArgs.Value.Port})
err := n.sendMessage(addr, Response{ID: request.ID, NodeID: n.id, Data: storeSuccessResponse}) err := n.sendMessage(addr, Response{ID: request.ID, NodeID: n.id, Data: storeSuccessResponse})
if err != nil { if err != nil {

2
dht/node_test.go
View file

@ -289,7 +289,7 @@ func TestFindValueExisting(t *testing.T) {
messageID := newMessageID() messageID := newMessageID()
valueToFind := bits.Rand() valueToFind := bits.Rand()
nodeToFind := Contact{ID: bits.Rand(), IP: net.ParseIP("1.2.3.4"), Port: 1286} nodeToFind := Contact{ID: bits.Rand(), IP: net.ParseIP("1.2.3.4"), PeerPort: 1286}
dht.node.store.Upsert(valueToFind, nodeToFind) dht.node.store.Upsert(valueToFind, nodeToFind)
dht.node.store.Upsert(valueToFind, nodeToFind) dht.node.store.Upsert(valueToFind, nodeToFind)
dht.node.store.Upsert(valueToFind, nodeToFind) dht.node.store.Upsert(valueToFind, nodeToFind)

59
dht/routing_table_test.go
View file

@ -9,6 +9,7 @@ import (
"testing" "testing"
"github.com/lbryio/reflector.go/dht/bits" "github.com/lbryio/reflector.go/dht/bits"
"github.com/sebdah/goldie" "github.com/sebdah/goldie"
) )
@ -59,7 +60,7 @@ func TestBucket_Split(t *testing.T) {
} }
for i, testCase := range tests { for i, testCase := range tests {
rt.Update(Contact{testCase.id, net.ParseIP("127.0.0.1"), 8000 + i}) rt.Update(Contact{testCase.id, net.ParseIP("127.0.0.1"), 8000 + i, 0})
if len(rt.buckets) != testCase.expectedBucketCount { if len(rt.buckets) != testCase.expectedBucketCount {
t.Errorf("failed test case %s. there should be %d buckets, got %d", testCase.name, testCase.expectedBucketCount, len(rt.buckets)) t.Errorf("failed test case %s. there should be %d buckets, got %d", testCase.name, testCase.expectedBucketCount, len(rt.buckets))
@ -126,25 +127,25 @@ func TestBucket_Split_KthClosest_DoSplit(t *testing.T) {
rt := newRoutingTable(bits.FromHexP("000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000")) rt := newRoutingTable(bits.FromHexP("000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"))
// add 4 low IDs // add 4 low IDs
rt.Update(Contact{bits.FromHexP("000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001"), net.ParseIP("127.0.0.1"), 8001}) rt.Update(Contact{bits.FromHexP("000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001"), net.ParseIP("127.0.0.1"), 8001, 0})
rt.Update(Contact{bits.FromHexP("000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002"), net.ParseIP("127.0.0.1"), 8002}) rt.Update(Contact{bits.FromHexP("000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002"), net.ParseIP("127.0.0.1"), 8002, 0})
rt.Update(Contact{bits.FromHexP("000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003"), net.ParseIP("127.0.0.1"), 8003}) rt.Update(Contact{bits.FromHexP("000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003"), net.ParseIP("127.0.0.1"), 8003, 0})
rt.Update(Contact{bits.FromHexP("000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000004"), net.ParseIP("127.0.0.1"), 8004}) rt.Update(Contact{bits.FromHexP("000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000004"), net.ParseIP("127.0.0.1"), 8004, 0})
// add 4 high IDs // add 4 high IDs
rt.Update(Contact{bits.FromHexP("800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8001}) rt.Update(Contact{bits.FromHexP("800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8001, 0})
rt.Update(Contact{bits.FromHexP("900000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8002}) rt.Update(Contact{bits.FromHexP("900000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8002, 0})
rt.Update(Contact{bits.FromHexP("a00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8003}) rt.Update(Contact{bits.FromHexP("a00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8003, 0})
rt.Update(Contact{bits.FromHexP("b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8004}) rt.Update(Contact{bits.FromHexP("b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8004, 0})
// split the bucket and fill the high bucket // split the bucket and fill the high bucket
rt.Update(Contact{bits.FromHexP("c00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8005}) rt.Update(Contact{bits.FromHexP("c00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8005, 0})
rt.Update(Contact{bits.FromHexP("d00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8006}) rt.Update(Contact{bits.FromHexP("d00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8006, 0})
rt.Update(Contact{bits.FromHexP("e00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8007}) rt.Update(Contact{bits.FromHexP("e00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8007, 0})
rt.Update(Contact{bits.FromHexP("f00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8008}) rt.Update(Contact{bits.FromHexP("f00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8008, 0})
// add a high ID. it should split because the high ID is closer than the Kth closest ID // add a high ID. it should split because the high ID is closer than the Kth closest ID
rt.Update(Contact{bits.FromHexP("910000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.1"), 8009}) rt.Update(Contact{bits.FromHexP("910000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.1"), 8009, 0})
if len(rt.buckets) != 3 { if len(rt.buckets) != 3 {
t.Errorf("expected 3 buckets, got %d", len(rt.buckets)) t.Errorf("expected 3 buckets, got %d", len(rt.buckets))
@ -158,25 +159,25 @@ func TestBucket_Split_KthClosest_DontSplit(t *testing.T) {
rt := newRoutingTable(bits.FromHexP("000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000")) rt := newRoutingTable(bits.FromHexP("000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"))
// add 4 low IDs // add 4 low IDs
rt.Update(Contact{bits.FromHexP("000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001"), net.ParseIP("127.0.0.1"), 8001}) rt.Update(Contact{bits.FromHexP("000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001"), net.ParseIP("127.0.0.1"), 8001, 0})
rt.Update(Contact{bits.FromHexP("000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002"), net.ParseIP("127.0.0.1"), 8002}) rt.Update(Contact{bits.FromHexP("000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002"), net.ParseIP("127.0.0.1"), 8002, 0})
rt.Update(Contact{bits.FromHexP("000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003"), net.ParseIP("127.0.0.1"), 8003}) rt.Update(Contact{bits.FromHexP("000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003"), net.ParseIP("127.0.0.1"), 8003, 0})
rt.Update(Contact{bits.FromHexP("000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000004"), net.ParseIP("127.0.0.1"), 8004}) rt.Update(Contact{bits.FromHexP("000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000004"), net.ParseIP("127.0.0.1"), 8004, 0})
// add 4 high IDs // add 4 high IDs
rt.Update(Contact{bits.FromHexP("800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8001}) rt.Update(Contact{bits.FromHexP("800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8001, 0})
rt.Update(Contact{bits.FromHexP("900000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8002}) rt.Update(Contact{bits.FromHexP("900000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8002, 0})
rt.Update(Contact{bits.FromHexP("a00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8003}) rt.Update(Contact{bits.FromHexP("a00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8003, 0})
rt.Update(Contact{bits.FromHexP("b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8004}) rt.Update(Contact{bits.FromHexP("b00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8004, 0})
// split the bucket and fill the high bucket // split the bucket and fill the high bucket
rt.Update(Contact{bits.FromHexP("c00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8005}) rt.Update(Contact{bits.FromHexP("c00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8005, 0})
rt.Update(Contact{bits.FromHexP("d00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8006}) rt.Update(Contact{bits.FromHexP("d00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8006, 0})
rt.Update(Contact{bits.FromHexP("e00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8007}) rt.Update(Contact{bits.FromHexP("e00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8007, 0})
rt.Update(Contact{bits.FromHexP("f00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8008}) rt.Update(Contact{bits.FromHexP("f00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.2"), 8008, 0})
// add a really high ID. this should not split because its not closer than the Kth closest ID // add a really high ID. this should not split because its not closer than the Kth closest ID
rt.Update(Contact{bits.FromHexP("ffff00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.1"), 8009}) rt.Update(Contact{bits.FromHexP("ffff00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), net.ParseIP("127.0.0.1"), 8009, 0})
if len(rt.buckets) != 2 { if len(rt.buckets) != 2 {
t.Errorf("expected 2 buckets, got %d", len(rt.buckets)) t.Errorf("expected 2 buckets, got %d", len(rt.buckets))
@ -191,8 +192,8 @@ func TestRoutingTable_GetClosest(t *testing.T) {
n2 := bits.FromHexP("FFFFFFF00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000") n2 := bits.FromHexP("FFFFFFF00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000")
n3 := bits.FromHexP("111111110000000000000000000000000000000000000000000000000000000000000000000000000000000000000000") n3 := bits.FromHexP("111111110000000000000000000000000000000000000000000000000000000000000000000000000000000000000000")
rt := newRoutingTable(n1) rt := newRoutingTable(n1)
rt.Update(Contact{n2, net.ParseIP("127.0.0.1"), 8001}) rt.Update(Contact{n2, net.ParseIP("127.0.0.1"), 8001, 0})
rt.Update(Contact{n3, net.ParseIP("127.0.0.1"), 8002}) rt.Update(Contact{n3, net.ParseIP("127.0.0.1"), 8002, 0})
contacts := rt.GetClosest(bits.FromHexP("222222220000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), 1) contacts := rt.GetClosest(bits.FromHexP("222222220000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"), 1)
if len(contacts) != 1 { if len(contacts) != 1 {