mirror of https://github.com/ethereum/go-ethereum
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
339 lines
9.5 KiB
339 lines
9.5 KiB
package discover
|
|
|
|
import (
|
|
"bytes"
|
|
"crypto/ecdsa"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
logpkg "log"
|
|
"net"
|
|
"os"
|
|
"path"
|
|
"reflect"
|
|
"runtime"
|
|
"sync"
|
|
"testing"
|
|
"time"
|
|
|
|
"github.com/ethereum/go-ethereum/logger"
|
|
)
|
|
|
|
func init() {
|
|
logger.AddLogSystem(logger.NewStdLogSystem(os.Stdout, logpkg.LstdFlags, logger.ErrorLevel))
|
|
}
|
|
|
|
type udpTest struct {
|
|
t *testing.T
|
|
pipe *dgramPipe
|
|
table *Table
|
|
udp *udp
|
|
sent [][]byte
|
|
localkey, remotekey *ecdsa.PrivateKey
|
|
remoteaddr *net.UDPAddr
|
|
}
|
|
|
|
func newUDPTest(t *testing.T) *udpTest {
|
|
test := &udpTest{
|
|
t: t,
|
|
pipe: newpipe(),
|
|
localkey: newkey(),
|
|
remotekey: newkey(),
|
|
remoteaddr: &net.UDPAddr{IP: net.IP{1, 2, 3, 4}, Port: 30303},
|
|
}
|
|
test.table, test.udp = newUDP(test.localkey, test.pipe, nil, nil)
|
|
return test
|
|
}
|
|
|
|
// handles a packet as if it had been sent to the transport.
|
|
func (test *udpTest) packetIn(wantError error, ptype byte, data packet) error {
|
|
enc, err := encodePacket(test.remotekey, ptype, data)
|
|
if err != nil {
|
|
return test.errorf("packet (%d) encode error: %v", err)
|
|
}
|
|
test.sent = append(test.sent, enc)
|
|
err = data.handle(test.udp, test.remoteaddr, PubkeyID(&test.remotekey.PublicKey), enc[:macSize])
|
|
if err != wantError {
|
|
return test.errorf("error mismatch: got %q, want %q", err, wantError)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// waits for a packet to be sent by the transport.
|
|
// validate should have type func(*udpTest, X) error, where X is a packet type.
|
|
func (test *udpTest) waitPacketOut(validate interface{}) error {
|
|
dgram := test.pipe.waitPacketOut()
|
|
p, _, _, err := decodePacket(dgram)
|
|
if err != nil {
|
|
return test.errorf("sent packet decode error: %v", err)
|
|
}
|
|
fn := reflect.ValueOf(validate)
|
|
exptype := fn.Type().In(0)
|
|
if reflect.TypeOf(p) != exptype {
|
|
return test.errorf("sent packet type mismatch, got: %v, want: %v", reflect.TypeOf(p), exptype)
|
|
}
|
|
fn.Call([]reflect.Value{reflect.ValueOf(p)})
|
|
return nil
|
|
}
|
|
|
|
func (test *udpTest) errorf(format string, args ...interface{}) error {
|
|
_, file, line, ok := runtime.Caller(2) // errorf + waitPacketOut
|
|
if ok {
|
|
file = path.Base(file)
|
|
} else {
|
|
file = "???"
|
|
line = 1
|
|
}
|
|
err := fmt.Errorf(format, args...)
|
|
fmt.Printf("\t%s:%d: %v\n", file, line, err)
|
|
test.t.Fail()
|
|
return err
|
|
}
|
|
|
|
// shared test variables
|
|
var (
|
|
futureExp = uint64(time.Now().Add(10 * time.Hour).Unix())
|
|
testTarget = MustHexID("01010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101")
|
|
)
|
|
|
|
func TestUDP_packetErrors(t *testing.T) {
|
|
test := newUDPTest(t)
|
|
defer test.table.Close()
|
|
|
|
test.packetIn(errExpired, pingPacket, &ping{IP: "foo", Port: 99, Version: Version})
|
|
test.packetIn(errBadVersion, pingPacket, &ping{IP: "foo", Port: 99, Version: 99, Expiration: futureExp})
|
|
test.packetIn(errUnsolicitedReply, pongPacket, &pong{ReplyTok: []byte{}, Expiration: futureExp})
|
|
test.packetIn(errUnknownNode, findnodePacket, &findnode{Expiration: futureExp})
|
|
test.packetIn(errUnsolicitedReply, neighborsPacket, &neighbors{Expiration: futureExp})
|
|
}
|
|
|
|
func TestUDP_pingTimeout(t *testing.T) {
|
|
t.Parallel()
|
|
test := newUDPTest(t)
|
|
defer test.table.Close()
|
|
|
|
toaddr := &net.UDPAddr{IP: net.ParseIP("1.2.3.4"), Port: 2222}
|
|
toid := NodeID{1, 2, 3, 4}
|
|
if err := test.udp.ping(toid, toaddr); err != errTimeout {
|
|
t.Error("expected timeout error, got", err)
|
|
}
|
|
}
|
|
|
|
func TestUDP_findnodeTimeout(t *testing.T) {
|
|
t.Parallel()
|
|
test := newUDPTest(t)
|
|
defer test.table.Close()
|
|
|
|
toaddr := &net.UDPAddr{IP: net.ParseIP("1.2.3.4"), Port: 2222}
|
|
toid := NodeID{1, 2, 3, 4}
|
|
target := NodeID{4, 5, 6, 7}
|
|
result, err := test.udp.findnode(toid, toaddr, target)
|
|
if err != errTimeout {
|
|
t.Error("expected timeout error, got", err)
|
|
}
|
|
if len(result) > 0 {
|
|
t.Error("expected empty result, got", result)
|
|
}
|
|
}
|
|
|
|
func TestUDP_findnode(t *testing.T) {
|
|
test := newUDPTest(t)
|
|
defer test.table.Close()
|
|
|
|
// put a few nodes into the table. their exact
|
|
// distribution shouldn't matter much, altough we need to
|
|
// take care not to overflow any bucket.
|
|
target := testTarget
|
|
nodes := &nodesByDistance{target: target}
|
|
for i := 0; i < bucketSize; i++ {
|
|
nodes.push(&Node{
|
|
IP: net.IP{1, 2, 3, byte(i)},
|
|
DiscPort: i + 2,
|
|
TCPPort: i + 2,
|
|
ID: randomID(test.table.self.ID, i+2),
|
|
}, bucketSize)
|
|
}
|
|
test.table.add(nodes.entries)
|
|
|
|
// ensure there's a bond with the test node,
|
|
// findnode won't be accepted otherwise.
|
|
test.table.cache.add(PubkeyID(&test.remotekey.PublicKey), test.remoteaddr, 99)
|
|
|
|
// check that closest neighbors are returned.
|
|
test.packetIn(nil, findnodePacket, &findnode{Target: testTarget, Expiration: futureExp})
|
|
test.waitPacketOut(func(p *neighbors) {
|
|
expected := test.table.closest(testTarget, bucketSize)
|
|
if len(p.Nodes) != bucketSize {
|
|
t.Errorf("wrong number of results: got %d, want %d", len(p.Nodes), bucketSize)
|
|
}
|
|
for i := range p.Nodes {
|
|
if p.Nodes[i].ID != expected.entries[i].ID {
|
|
t.Errorf("result mismatch at %d:\n got: %v\n want: %v", i, p.Nodes[i], expected.entries[i])
|
|
}
|
|
}
|
|
})
|
|
}
|
|
|
|
func TestUDP_findnodeMultiReply(t *testing.T) {
|
|
test := newUDPTest(t)
|
|
defer test.table.Close()
|
|
|
|
// queue a pending findnode request
|
|
resultc, errc := make(chan []*Node), make(chan error)
|
|
go func() {
|
|
rid := PubkeyID(&test.remotekey.PublicKey)
|
|
ns, err := test.udp.findnode(rid, test.remoteaddr, testTarget)
|
|
if err != nil && len(ns) == 0 {
|
|
errc <- err
|
|
} else {
|
|
resultc <- ns
|
|
}
|
|
}()
|
|
|
|
// wait for the findnode to be sent.
|
|
// after it is sent, the transport is waiting for a reply
|
|
test.waitPacketOut(func(p *findnode) {
|
|
if p.Target != testTarget {
|
|
t.Errorf("wrong target: got %v, want %v", p.Target, testTarget)
|
|
}
|
|
})
|
|
|
|
// send the reply as two packets.
|
|
list := []*Node{
|
|
MustParseNode("enode://ba85011c70bcc5c04d8607d3a0ed29aa6179c092cbdda10d5d32684fb33ed01bd94f588ca8f91ac48318087dcb02eaf36773a7a453f0eedd6742af668097b29c@10.0.1.16:30303"),
|
|
MustParseNode("enode://81fa361d25f157cd421c60dcc28d8dac5ef6a89476633339c5df30287474520caca09627da18543d9079b5b288698b542d56167aa5c09111e55acdbbdf2ef799@10.0.1.16:30303"),
|
|
MustParseNode("enode://9bffefd833d53fac8e652415f4973bee289e8b1a5c6c4cbe70abf817ce8a64cee11b823b66a987f51aaa9fba0d6a91b3e6bf0d5a5d1042de8e9eeea057b217f8@10.0.1.36:30301"),
|
|
MustParseNode("enode://1b5b4aa662d7cb44a7221bfba67302590b643028197a7d5214790f3bac7aaa4a3241be9e83c09cf1f6c69d007c634faae3dc1b1221793e8446c0b3a09de65960@10.0.1.16:30303"),
|
|
}
|
|
test.packetIn(nil, neighborsPacket, &neighbors{Expiration: futureExp, Nodes: list[:2]})
|
|
test.packetIn(nil, neighborsPacket, &neighbors{Expiration: futureExp, Nodes: list[2:]})
|
|
|
|
// check that the sent neighbors are all returned by findnode
|
|
select {
|
|
case result := <-resultc:
|
|
if !reflect.DeepEqual(result, list) {
|
|
t.Errorf("neighbors mismatch:\n got: %v\n want: %v", result, list)
|
|
}
|
|
case err := <-errc:
|
|
t.Errorf("findnode error: %v", err)
|
|
case <-time.After(5 * time.Second):
|
|
t.Error("findnode did not return within 5 seconds")
|
|
}
|
|
}
|
|
|
|
func TestUDP_successfulPing(t *testing.T) {
|
|
test := newUDPTest(t)
|
|
defer test.table.Close()
|
|
|
|
done := make(chan struct{})
|
|
go func() {
|
|
test.packetIn(nil, pingPacket, &ping{IP: "foo", Port: 99, Version: Version, Expiration: futureExp})
|
|
close(done)
|
|
}()
|
|
|
|
// the ping is replied to.
|
|
test.waitPacketOut(func(p *pong) {
|
|
pinghash := test.sent[0][:macSize]
|
|
if !bytes.Equal(p.ReplyTok, pinghash) {
|
|
t.Errorf("got ReplyTok %x, want %x", p.ReplyTok, pinghash)
|
|
}
|
|
})
|
|
|
|
// remote is unknown, the table pings back.
|
|
test.waitPacketOut(func(p *ping) error { return nil })
|
|
test.packetIn(nil, pongPacket, &pong{Expiration: futureExp})
|
|
|
|
// ping should return shortly after getting the pong packet.
|
|
<-done
|
|
|
|
// check that the node was added.
|
|
rid := PubkeyID(&test.remotekey.PublicKey)
|
|
rnode := find(test.table, rid)
|
|
if rnode == nil {
|
|
t.Fatalf("node %v not found in table", rid)
|
|
}
|
|
if !bytes.Equal(rnode.IP, test.remoteaddr.IP) {
|
|
t.Errorf("node has wrong IP: got %v, want: %v", rnode.IP, test.remoteaddr.IP)
|
|
}
|
|
if rnode.DiscPort != test.remoteaddr.Port {
|
|
t.Errorf("node has wrong Port: got %v, want: %v", rnode.DiscPort, test.remoteaddr.Port)
|
|
}
|
|
if rnode.TCPPort != 99 {
|
|
t.Errorf("node has wrong Port: got %v, want: %v", rnode.TCPPort, 99)
|
|
}
|
|
}
|
|
|
|
func find(tab *Table, id NodeID) *Node {
|
|
for _, b := range tab.buckets {
|
|
for _, e := range b.entries {
|
|
if e.ID == id {
|
|
return e
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// dgramPipe is a fake UDP socket. It queues all sent datagrams.
|
|
type dgramPipe struct {
|
|
mu *sync.Mutex
|
|
cond *sync.Cond
|
|
closing chan struct{}
|
|
closed bool
|
|
queue [][]byte
|
|
}
|
|
|
|
func newpipe() *dgramPipe {
|
|
mu := new(sync.Mutex)
|
|
return &dgramPipe{
|
|
closing: make(chan struct{}),
|
|
cond: &sync.Cond{L: mu},
|
|
mu: mu,
|
|
}
|
|
}
|
|
|
|
// WriteToUDP queues a datagram.
|
|
func (c *dgramPipe) WriteToUDP(b []byte, to *net.UDPAddr) (n int, err error) {
|
|
msg := make([]byte, len(b))
|
|
copy(msg, b)
|
|
c.mu.Lock()
|
|
defer c.mu.Unlock()
|
|
if c.closed {
|
|
return 0, errors.New("closed")
|
|
}
|
|
c.queue = append(c.queue, msg)
|
|
c.cond.Signal()
|
|
return len(b), nil
|
|
}
|
|
|
|
// ReadFromUDP just hangs until the pipe is closed.
|
|
func (c *dgramPipe) ReadFromUDP(b []byte) (n int, addr *net.UDPAddr, err error) {
|
|
<-c.closing
|
|
return 0, nil, io.EOF
|
|
}
|
|
|
|
func (c *dgramPipe) Close() error {
|
|
c.mu.Lock()
|
|
defer c.mu.Unlock()
|
|
if !c.closed {
|
|
close(c.closing)
|
|
c.closed = true
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (c *dgramPipe) LocalAddr() net.Addr {
|
|
return &net.UDPAddr{}
|
|
}
|
|
|
|
func (c *dgramPipe) waitPacketOut() []byte {
|
|
c.mu.Lock()
|
|
defer c.mu.Unlock()
|
|
for len(c.queue) == 0 {
|
|
c.cond.Wait()
|
|
}
|
|
p := c.queue[0]
|
|
copy(c.queue, c.queue[1:])
|
|
c.queue = c.queue[:len(c.queue)-1]
|
|
return p
|
|
}
|
|
|