forked from cerc-io/plugeth
9123eceb0f
* p2p: add DialRatio for configuration of inbound vs. dialed connections * p2p: add connection flags to PeerInfo * p2p/netutil: add SameNet, DistinctNetSet * p2p/discover: improve revalidation and seeding This changes node revalidation to be periodic instead of on-demand. This should prevent issues where dead nodes get stuck in closer buckets because no other node will ever come along to replace them. Every 5 seconds (on average), the last node in a random bucket is checked and moved to the front of the bucket if it is still responding. If revalidation fails, the last node is replaced by an entry of the 'replacement list' containing recently-seen nodes. Most close buckets are removed because it's very unlikely we'll ever encounter a node that would fall into any of those buckets. Table seeding is also improved: we now require a few minutes of table membership before considering a node as a potential seed node. This should make it less likely to store short-lived nodes as potential seeds. * p2p/discover: fix nits in UDP transport We would skip sending neighbors replies if there were fewer than maxNeighbors results and CheckRelayIP returned an error for the last one. While here, also resolve a TODO about pong reply tokens.
565 lines
20 KiB
Go
565 lines
20 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package discover
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import (
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"bytes"
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"crypto/ecdsa"
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"encoding/binary"
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"encoding/hex"
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"errors"
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"fmt"
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"io"
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"math/rand"
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"net"
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"path/filepath"
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"reflect"
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"runtime"
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"sync"
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"testing"
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"time"
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"github.com/davecgh/go-spew/spew"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/rlp"
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)
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func init() {
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spew.Config.DisableMethods = true
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}
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// shared test variables
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var (
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futureExp = uint64(time.Now().Add(10 * time.Hour).Unix())
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testTarget = NodeID{0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1}
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testRemote = rpcEndpoint{IP: net.ParseIP("1.1.1.1").To4(), UDP: 1, TCP: 2}
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testLocalAnnounced = rpcEndpoint{IP: net.ParseIP("2.2.2.2").To4(), UDP: 3, TCP: 4}
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testLocal = rpcEndpoint{IP: net.ParseIP("3.3.3.3").To4(), UDP: 5, TCP: 6}
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)
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type udpTest struct {
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t *testing.T
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pipe *dgramPipe
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table *Table
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udp *udp
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sent [][]byte
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localkey, remotekey *ecdsa.PrivateKey
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remoteaddr *net.UDPAddr
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}
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func newUDPTest(t *testing.T) *udpTest {
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test := &udpTest{
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t: t,
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pipe: newpipe(),
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localkey: newkey(),
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remotekey: newkey(),
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remoteaddr: &net.UDPAddr{IP: net.IP{10, 0, 1, 99}, Port: 30303},
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}
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test.table, test.udp, _ = newUDP(test.pipe, Config{PrivateKey: test.localkey})
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// Wait for initial refresh so the table doesn't send unexpected findnode.
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<-test.table.initDone
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return test
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}
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// handles a packet as if it had been sent to the transport.
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func (test *udpTest) packetIn(wantError error, ptype byte, data packet) error {
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enc, _, err := encodePacket(test.remotekey, ptype, data)
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if err != nil {
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return test.errorf("packet (%d) encode error: %v", ptype, err)
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}
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test.sent = append(test.sent, enc)
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if err = test.udp.handlePacket(test.remoteaddr, enc); err != wantError {
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return test.errorf("error mismatch: got %q, want %q", err, wantError)
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}
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return nil
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}
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// waits for a packet to be sent by the transport.
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// validate should have type func(*udpTest, X) error, where X is a packet type.
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func (test *udpTest) waitPacketOut(validate interface{}) ([]byte, error) {
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dgram := test.pipe.waitPacketOut()
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p, _, hash, err := decodePacket(dgram)
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if err != nil {
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return hash, test.errorf("sent packet decode error: %v", err)
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}
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fn := reflect.ValueOf(validate)
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exptype := fn.Type().In(0)
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if reflect.TypeOf(p) != exptype {
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return hash, test.errorf("sent packet type mismatch, got: %v, want: %v", reflect.TypeOf(p), exptype)
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}
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fn.Call([]reflect.Value{reflect.ValueOf(p)})
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return hash, nil
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}
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func (test *udpTest) errorf(format string, args ...interface{}) error {
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_, file, line, ok := runtime.Caller(2) // errorf + waitPacketOut
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if ok {
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file = filepath.Base(file)
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} else {
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file = "???"
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line = 1
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}
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err := fmt.Errorf(format, args...)
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fmt.Printf("\t%s:%d: %v\n", file, line, err)
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test.t.Fail()
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return err
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}
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func TestUDP_packetErrors(t *testing.T) {
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test := newUDPTest(t)
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defer test.table.Close()
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test.packetIn(errExpired, pingPacket, &ping{From: testRemote, To: testLocalAnnounced, Version: Version})
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test.packetIn(errUnsolicitedReply, pongPacket, &pong{ReplyTok: []byte{}, Expiration: futureExp})
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test.packetIn(errUnknownNode, findnodePacket, &findnode{Expiration: futureExp})
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test.packetIn(errUnsolicitedReply, neighborsPacket, &neighbors{Expiration: futureExp})
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}
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func TestUDP_pingTimeout(t *testing.T) {
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t.Parallel()
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test := newUDPTest(t)
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defer test.table.Close()
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toaddr := &net.UDPAddr{IP: net.ParseIP("1.2.3.4"), Port: 2222}
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toid := NodeID{1, 2, 3, 4}
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if err := test.udp.ping(toid, toaddr); err != errTimeout {
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t.Error("expected timeout error, got", err)
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}
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}
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func TestUDP_responseTimeouts(t *testing.T) {
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t.Parallel()
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test := newUDPTest(t)
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defer test.table.Close()
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rand.Seed(time.Now().UnixNano())
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randomDuration := func(max time.Duration) time.Duration {
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return time.Duration(rand.Int63n(int64(max)))
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}
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var (
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nReqs = 200
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nTimeouts = 0 // number of requests with ptype > 128
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nilErr = make(chan error, nReqs) // for requests that get a reply
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timeoutErr = make(chan error, nReqs) // for requests that time out
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)
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for i := 0; i < nReqs; i++ {
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// Create a matcher for a random request in udp.loop. Requests
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// with ptype <= 128 will not get a reply and should time out.
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// For all other requests, a reply is scheduled to arrive
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// within the timeout window.
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p := &pending{
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ptype: byte(rand.Intn(255)),
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callback: func(interface{}) bool { return true },
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}
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binary.BigEndian.PutUint64(p.from[:], uint64(i))
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if p.ptype <= 128 {
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p.errc = timeoutErr
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test.udp.addpending <- p
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nTimeouts++
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} else {
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p.errc = nilErr
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test.udp.addpending <- p
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time.AfterFunc(randomDuration(60*time.Millisecond), func() {
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if !test.udp.handleReply(p.from, p.ptype, nil) {
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t.Logf("not matched: %v", p)
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}
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})
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}
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time.Sleep(randomDuration(30 * time.Millisecond))
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}
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// Check that all timeouts were delivered and that the rest got nil errors.
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// The replies must be delivered.
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var (
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recvDeadline = time.After(20 * time.Second)
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nTimeoutsRecv, nNil = 0, 0
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)
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for i := 0; i < nReqs; i++ {
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select {
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case err := <-timeoutErr:
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if err != errTimeout {
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t.Fatalf("got non-timeout error on timeoutErr %d: %v", i, err)
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}
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nTimeoutsRecv++
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case err := <-nilErr:
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if err != nil {
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t.Fatalf("got non-nil error on nilErr %d: %v", i, err)
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}
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nNil++
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case <-recvDeadline:
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t.Fatalf("exceeded recv deadline")
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}
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}
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if nTimeoutsRecv != nTimeouts {
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t.Errorf("wrong number of timeout errors received: got %d, want %d", nTimeoutsRecv, nTimeouts)
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}
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if nNil != nReqs-nTimeouts {
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t.Errorf("wrong number of successful replies: got %d, want %d", nNil, nReqs-nTimeouts)
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}
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}
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func TestUDP_findnodeTimeout(t *testing.T) {
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t.Parallel()
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test := newUDPTest(t)
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defer test.table.Close()
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toaddr := &net.UDPAddr{IP: net.ParseIP("1.2.3.4"), Port: 2222}
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toid := NodeID{1, 2, 3, 4}
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target := NodeID{4, 5, 6, 7}
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result, err := test.udp.findnode(toid, toaddr, target)
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if err != errTimeout {
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t.Error("expected timeout error, got", err)
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}
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if len(result) > 0 {
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t.Error("expected empty result, got", result)
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}
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}
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func TestUDP_findnode(t *testing.T) {
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test := newUDPTest(t)
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defer test.table.Close()
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// put a few nodes into the table. their exact
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// distribution shouldn't matter much, although we need to
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// take care not to overflow any bucket.
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targetHash := crypto.Keccak256Hash(testTarget[:])
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nodes := &nodesByDistance{target: targetHash}
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for i := 0; i < bucketSize; i++ {
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nodes.push(nodeAtDistance(test.table.self.sha, i+2), bucketSize)
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}
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test.table.stuff(nodes.entries)
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// ensure there's a bond with the test node,
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// findnode won't be accepted otherwise.
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test.table.db.updateNode(NewNode(
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PubkeyID(&test.remotekey.PublicKey),
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test.remoteaddr.IP,
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uint16(test.remoteaddr.Port),
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99,
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))
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// check that closest neighbors are returned.
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test.packetIn(nil, findnodePacket, &findnode{Target: testTarget, Expiration: futureExp})
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expected := test.table.closest(targetHash, bucketSize)
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waitNeighbors := func(want []*Node) {
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test.waitPacketOut(func(p *neighbors) {
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if len(p.Nodes) != len(want) {
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t.Errorf("wrong number of results: got %d, want %d", len(p.Nodes), bucketSize)
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}
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for i := range p.Nodes {
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if p.Nodes[i].ID != want[i].ID {
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t.Errorf("result mismatch at %d:\n got: %v\n want: %v", i, p.Nodes[i], expected.entries[i])
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}
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}
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})
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}
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waitNeighbors(expected.entries[:maxNeighbors])
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waitNeighbors(expected.entries[maxNeighbors:])
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}
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func TestUDP_findnodeMultiReply(t *testing.T) {
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test := newUDPTest(t)
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defer test.table.Close()
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// queue a pending findnode request
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resultc, errc := make(chan []*Node), make(chan error)
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go func() {
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rid := PubkeyID(&test.remotekey.PublicKey)
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ns, err := test.udp.findnode(rid, test.remoteaddr, testTarget)
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if err != nil && len(ns) == 0 {
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errc <- err
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} else {
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resultc <- ns
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}
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}()
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// wait for the findnode to be sent.
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// after it is sent, the transport is waiting for a reply
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test.waitPacketOut(func(p *findnode) {
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if p.Target != testTarget {
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t.Errorf("wrong target: got %v, want %v", p.Target, testTarget)
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}
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})
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// send the reply as two packets.
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list := []*Node{
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MustParseNode("enode://ba85011c70bcc5c04d8607d3a0ed29aa6179c092cbdda10d5d32684fb33ed01bd94f588ca8f91ac48318087dcb02eaf36773a7a453f0eedd6742af668097b29c@10.0.1.16:30303?discport=30304"),
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MustParseNode("enode://81fa361d25f157cd421c60dcc28d8dac5ef6a89476633339c5df30287474520caca09627da18543d9079b5b288698b542d56167aa5c09111e55acdbbdf2ef799@10.0.1.16:30303"),
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MustParseNode("enode://9bffefd833d53fac8e652415f4973bee289e8b1a5c6c4cbe70abf817ce8a64cee11b823b66a987f51aaa9fba0d6a91b3e6bf0d5a5d1042de8e9eeea057b217f8@10.0.1.36:30301?discport=17"),
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MustParseNode("enode://1b5b4aa662d7cb44a7221bfba67302590b643028197a7d5214790f3bac7aaa4a3241be9e83c09cf1f6c69d007c634faae3dc1b1221793e8446c0b3a09de65960@10.0.1.16:30303"),
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}
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rpclist := make([]rpcNode, len(list))
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for i := range list {
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rpclist[i] = nodeToRPC(list[i])
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}
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test.packetIn(nil, neighborsPacket, &neighbors{Expiration: futureExp, Nodes: rpclist[:2]})
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test.packetIn(nil, neighborsPacket, &neighbors{Expiration: futureExp, Nodes: rpclist[2:]})
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// check that the sent neighbors are all returned by findnode
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select {
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case result := <-resultc:
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want := append(list[:2], list[3:]...)
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if !reflect.DeepEqual(result, want) {
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t.Errorf("neighbors mismatch:\n got: %v\n want: %v", result, want)
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}
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case err := <-errc:
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t.Errorf("findnode error: %v", err)
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case <-time.After(5 * time.Second):
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t.Error("findnode did not return within 5 seconds")
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}
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}
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func TestUDP_successfulPing(t *testing.T) {
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test := newUDPTest(t)
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added := make(chan *Node, 1)
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test.table.nodeAddedHook = func(n *Node) { added <- n }
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defer test.table.Close()
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// The remote side sends a ping packet to initiate the exchange.
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go test.packetIn(nil, pingPacket, &ping{From: testRemote, To: testLocalAnnounced, Version: Version, Expiration: futureExp})
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// the ping is replied to.
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test.waitPacketOut(func(p *pong) {
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pinghash := test.sent[0][:macSize]
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if !bytes.Equal(p.ReplyTok, pinghash) {
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t.Errorf("got pong.ReplyTok %x, want %x", p.ReplyTok, pinghash)
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}
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wantTo := rpcEndpoint{
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// The mirrored UDP address is the UDP packet sender
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IP: test.remoteaddr.IP, UDP: uint16(test.remoteaddr.Port),
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// The mirrored TCP port is the one from the ping packet
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TCP: testRemote.TCP,
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}
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if !reflect.DeepEqual(p.To, wantTo) {
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t.Errorf("got pong.To %v, want %v", p.To, wantTo)
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}
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})
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// remote is unknown, the table pings back.
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hash, _ := test.waitPacketOut(func(p *ping) error {
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if !reflect.DeepEqual(p.From, test.udp.ourEndpoint) {
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t.Errorf("got ping.From %v, want %v", p.From, test.udp.ourEndpoint)
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}
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wantTo := rpcEndpoint{
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// The mirrored UDP address is the UDP packet sender.
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IP: test.remoteaddr.IP, UDP: uint16(test.remoteaddr.Port),
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TCP: 0,
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}
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if !reflect.DeepEqual(p.To, wantTo) {
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t.Errorf("got ping.To %v, want %v", p.To, wantTo)
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}
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return nil
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})
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test.packetIn(nil, pongPacket, &pong{ReplyTok: hash, Expiration: futureExp})
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// the node should be added to the table shortly after getting the
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// pong packet.
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select {
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case n := <-added:
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rid := PubkeyID(&test.remotekey.PublicKey)
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if n.ID != rid {
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t.Errorf("node has wrong ID: got %v, want %v", n.ID, rid)
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}
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if !n.IP.Equal(test.remoteaddr.IP) {
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t.Errorf("node has wrong IP: got %v, want: %v", n.IP, test.remoteaddr.IP)
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}
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if int(n.UDP) != test.remoteaddr.Port {
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t.Errorf("node has wrong UDP port: got %v, want: %v", n.UDP, test.remoteaddr.Port)
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}
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if n.TCP != testRemote.TCP {
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t.Errorf("node has wrong TCP port: got %v, want: %v", n.TCP, testRemote.TCP)
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}
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case <-time.After(2 * time.Second):
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t.Errorf("node was not added within 2 seconds")
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}
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}
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var testPackets = []struct {
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input string
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wantPacket interface{}
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}{
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{
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input: "71dbda3a79554728d4f94411e42ee1f8b0d561c10e1e5f5893367948c6a7d70bb87b235fa28a77070271b6c164a2dce8c7e13a5739b53b5e96f2e5acb0e458a02902f5965d55ecbeb2ebb6cabb8b2b232896a36b737666c55265ad0a68412f250001ea04cb847f000001820cfa8215a8d790000000000000000000000000000000018208ae820d058443b9a355",
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wantPacket: &ping{
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Version: 4,
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From: rpcEndpoint{net.ParseIP("127.0.0.1").To4(), 3322, 5544},
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To: rpcEndpoint{net.ParseIP("::1"), 2222, 3333},
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Expiration: 1136239445,
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Rest: []rlp.RawValue{},
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},
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},
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{
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input: "e9614ccfd9fc3e74360018522d30e1419a143407ffcce748de3e22116b7e8dc92ff74788c0b6663aaa3d67d641936511c8f8d6ad8698b820a7cf9e1be7155e9a241f556658c55428ec0563514365799a4be2be5a685a80971ddcfa80cb422cdd0101ec04cb847f000001820cfa8215a8d790000000000000000000000000000000018208ae820d058443b9a3550102",
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wantPacket: &ping{
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Version: 4,
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From: rpcEndpoint{net.ParseIP("127.0.0.1").To4(), 3322, 5544},
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To: rpcEndpoint{net.ParseIP("::1"), 2222, 3333},
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Expiration: 1136239445,
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Rest: []rlp.RawValue{{0x01}, {0x02}},
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},
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},
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{
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input: "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",
|
|
wantPacket: &ping{
|
|
Version: 555,
|
|
From: rpcEndpoint{net.ParseIP("2001:db8:3c4d:15::abcd:ef12"), 3322, 5544},
|
|
To: rpcEndpoint{net.ParseIP("2001:db8:85a3:8d3:1319:8a2e:370:7348"), 2222, 33338},
|
|
Expiration: 1136239445,
|
|
Rest: []rlp.RawValue{{0xC5, 0x01, 0x02, 0x03, 0x04, 0x05}},
|
|
},
|
|
},
|
|
{
|
|
input: "09b2428d83348d27cdf7064ad9024f526cebc19e4958f0fdad87c15eb598dd61d08423e0bf66b2069869e1724125f820d851c136684082774f870e614d95a2855d000f05d1648b2d5945470bc187c2d2216fbe870f43ed0909009882e176a46b0102f846d79020010db885a308d313198a2e037073488208ae82823aa0fbc914b16819237dcd8801d7e53f69e9719adecb3cc0e790c57e91ca4461c9548443b9a355c6010203c2040506a0c969a58f6f9095004c0177a6b47f451530cab38966a25cca5cb58f055542124e",
|
|
wantPacket: &pong{
|
|
To: rpcEndpoint{net.ParseIP("2001:db8:85a3:8d3:1319:8a2e:370:7348"), 2222, 33338},
|
|
ReplyTok: common.Hex2Bytes("fbc914b16819237dcd8801d7e53f69e9719adecb3cc0e790c57e91ca4461c954"),
|
|
Expiration: 1136239445,
|
|
Rest: []rlp.RawValue{{0xC6, 0x01, 0x02, 0x03, 0xC2, 0x04, 0x05}, {0x06}},
|
|
},
|
|
},
|
|
{
|
|
input: "c7c44041b9f7c7e41934417ebac9a8e1a4c6298f74553f2fcfdcae6ed6fe53163eb3d2b52e39fe91831b8a927bf4fc222c3902202027e5e9eb812195f95d20061ef5cd31d502e47ecb61183f74a504fe04c51e73df81f25c4d506b26db4517490103f84eb840ca634cae0d49acb401d8a4c6b6fe8c55b70d115bf400769cc1400f3258cd31387574077f301b421bc84df7266c44e9e6d569fc56be00812904767bf5ccd1fc7f8443b9a35582999983999999280dc62cc8255c73471e0a61da0c89acdc0e035e260add7fc0c04ad9ebf3919644c91cb247affc82b69bd2ca235c71eab8e49737c937a2c396",
|
|
wantPacket: &findnode{
|
|
Target: MustHexID("ca634cae0d49acb401d8a4c6b6fe8c55b70d115bf400769cc1400f3258cd31387574077f301b421bc84df7266c44e9e6d569fc56be00812904767bf5ccd1fc7f"),
|
|
Expiration: 1136239445,
|
|
Rest: []rlp.RawValue{{0x82, 0x99, 0x99}, {0x83, 0x99, 0x99, 0x99}},
|
|
},
|
|
},
|
|
{
|
|
input: "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",
|
|
wantPacket: &neighbors{
|
|
Nodes: []rpcNode{
|
|
{
|
|
ID: MustHexID("3155e1427f85f10a5c9a7755877748041af1bcd8d474ec065eb33df57a97babf54bfd2103575fa829115d224c523596b401065a97f74010610fce76382c0bf32"),
|
|
IP: net.ParseIP("99.33.22.55").To4(),
|
|
UDP: 4444,
|
|
TCP: 4445,
|
|
},
|
|
{
|
|
ID: MustHexID("312c55512422cf9b8a4097e9a6ad79402e87a15ae909a4bfefa22398f03d20951933beea1e4dfa6f968212385e829f04c2d314fc2d4e255e0d3bc08792b069db"),
|
|
IP: net.ParseIP("1.2.3.4").To4(),
|
|
UDP: 1,
|
|
TCP: 1,
|
|
},
|
|
{
|
|
ID: MustHexID("38643200b172dcfef857492156971f0e6aa2c538d8b74010f8e140811d53b98c765dd2d96126051913f44582e8c199ad7c6d6819e9a56483f637feaac9448aac"),
|
|
IP: net.ParseIP("2001:db8:3c4d:15::abcd:ef12"),
|
|
UDP: 3333,
|
|
TCP: 3333,
|
|
},
|
|
{
|
|
ID: MustHexID("8dcab8618c3253b558d459da53bd8fa68935a719aff8b811197101a4b2b47dd2d47295286fc00cc081bb542d760717d1bdd6bec2c37cd72eca367d6dd3b9df73"),
|
|
IP: net.ParseIP("2001:db8:85a3:8d3:1319:8a2e:370:7348"),
|
|
UDP: 999,
|
|
TCP: 1000,
|
|
},
|
|
},
|
|
Expiration: 1136239445,
|
|
Rest: []rlp.RawValue{{0x01}, {0x02}, {0x03}},
|
|
},
|
|
},
|
|
}
|
|
|
|
func TestForwardCompatibility(t *testing.T) {
|
|
testkey, _ := crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
|
|
wantNodeID := PubkeyID(&testkey.PublicKey)
|
|
|
|
for _, test := range testPackets {
|
|
input, err := hex.DecodeString(test.input)
|
|
if err != nil {
|
|
t.Fatalf("invalid hex: %s", test.input)
|
|
}
|
|
packet, nodeid, _, err := decodePacket(input)
|
|
if err != nil {
|
|
t.Errorf("did not accept packet %s\n%v", test.input, err)
|
|
continue
|
|
}
|
|
if !reflect.DeepEqual(packet, test.wantPacket) {
|
|
t.Errorf("got %s\nwant %s", spew.Sdump(packet), spew.Sdump(test.wantPacket))
|
|
}
|
|
if nodeid != wantNodeID {
|
|
t.Errorf("got id %v\nwant id %v", nodeid, wantNodeID)
|
|
}
|
|
}
|
|
}
|
|
|
|
// 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{IP: testLocal.IP, Port: int(testLocal.UDP)}
|
|
}
|
|
|
|
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
|
|
}
|