diff --git a/discover/common.go b/discover/common.go
index b465ca8..c36e8dc 100644
--- a/discover/common.go
+++ b/discover/common.go
@@ -25,7 +25,6 @@ import (
"github.com/ethereum/go-ethereum/p2p/enode"
"github.com/ethereum/go-ethereum/p2p/enr"
"github.com/ethereum/go-ethereum/p2p/netutil"
- "github.com/waku-org/go-discover/discover/v5wire"
)
// UDPConn is a network connection on which discovery can operate.
@@ -46,13 +45,15 @@ type Config struct {
PrivateKey *ecdsa.PrivateKey
// These settings are optional:
- NetRestrict *netutil.Netlist // list of allowed IP networks
- Bootnodes []*enode.Node // list of bootstrap nodes
- Unhandled chan<- ReadPacket // unhandled packets are sent on this channel
- Log log.Logger // if set, log messages go here
- ValidSchemes enr.IdentityScheme // allowed identity schemes
- V5Config V5Config // DiscV5 settings
- ValidNodeFn func(enode.Node) bool // function to validate a node before it's added to routing tables
+ NetRestrict *netutil.Netlist // list of allowed IP networks
+ Bootnodes []*enode.Node // list of bootstrap nodes
+ Unhandled chan<- ReadPacket // unhandled packets are sent on this channel
+ Log log.Logger // if set, log messages go here
+
+ // V5ProtocolID configures the discv5 protocol identifier.
+ V5ProtocolID *[6]byte
+
+ ValidSchemes enr.IdentityScheme // allowed identity schemes
Clock mclock.Clock
}
@@ -66,9 +67,6 @@ func (cfg Config) withDefaults() Config {
if cfg.Clock == nil {
cfg.Clock = mclock.System{}
}
- if cfg.V5Config.ProtocolID == nil {
- cfg.V5Config.ProtocolID = &v5wire.DefaultProtocolID
- }
return cfg
}
diff --git a/discover/metrics.go b/discover/metrics.go
new file mode 100644
index 0000000..bf1a2fa
--- /dev/null
+++ b/discover/metrics.go
@@ -0,0 +1,65 @@
+// Copyright 2023 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see .
+
+package discover
+
+import (
+ "net"
+
+ "github.com/ethereum/go-ethereum/metrics"
+)
+
+const (
+ moduleName = "discover"
+ // ingressMeterName is the prefix of the per-packet inbound metrics.
+ ingressMeterName = moduleName + "/ingress"
+
+ // egressMeterName is the prefix of the per-packet outbound metrics.
+ egressMeterName = moduleName + "/egress"
+)
+
+var (
+ ingressTrafficMeter = metrics.NewRegisteredMeter(ingressMeterName, nil)
+ egressTrafficMeter = metrics.NewRegisteredMeter(egressMeterName, nil)
+)
+
+// meteredConn is a wrapper around a net.UDPConn that meters both the
+// inbound and outbound network traffic.
+type meteredUdpConn struct {
+ UDPConn
+}
+
+func newMeteredConn(conn UDPConn) UDPConn {
+ // Short circuit if metrics are disabled
+ if !metrics.Enabled {
+ return conn
+ }
+ return &meteredUdpConn{UDPConn: conn}
+}
+
+// Read delegates a network read to the underlying connection, bumping the udp ingress traffic meter along the way.
+func (c *meteredUdpConn) ReadFromUDP(b []byte) (n int, addr *net.UDPAddr, err error) {
+ n, addr, err = c.UDPConn.ReadFromUDP(b)
+ ingressTrafficMeter.Mark(int64(n))
+ return n, addr, err
+}
+
+// Write delegates a network write to the underlying connection, bumping the udp egress traffic meter along the way.
+func (c *meteredUdpConn) WriteToUDP(b []byte, addr *net.UDPAddr) (n int, err error) {
+ n, err = c.UDPConn.WriteToUDP(b, addr)
+ egressTrafficMeter.Mark(int64(n))
+ return n, err
+}
diff --git a/discover/table.go b/discover/table.go
index c91b8b8..41d5ac6 100644
--- a/discover/table.go
+++ b/discover/table.go
@@ -79,8 +79,6 @@ type Table struct {
closeReq chan struct{}
closed chan struct{}
- nodeIsValidFn func(enode.Node) bool
-
nodeAddedHook func(*node) // for testing
}
@@ -101,18 +99,17 @@ type bucket struct {
ips netutil.DistinctNetSet
}
-func newTable(t transport, db *enode.DB, bootnodes []*enode.Node, nodeIsValidFn func(enode.Node) bool, log log.Logger) (*Table, error) {
+func newTable(t transport, db *enode.DB, bootnodes []*enode.Node, log log.Logger) (*Table, error) {
tab := &Table{
- net: t,
- db: db,
- refreshReq: make(chan chan struct{}),
- initDone: make(chan struct{}),
- closeReq: make(chan struct{}),
- closed: make(chan struct{}),
- rand: mrand.New(mrand.NewSource(0)),
- ips: netutil.DistinctNetSet{Subnet: tableSubnet, Limit: tableIPLimit},
- nodeIsValidFn: nodeIsValidFn,
- log: log,
+ net: t,
+ db: db,
+ refreshReq: make(chan chan struct{}),
+ initDone: make(chan struct{}),
+ closeReq: make(chan struct{}),
+ closed: make(chan struct{}),
+ rand: mrand.New(mrand.NewSource(0)),
+ ips: netutil.DistinctNetSet{Subnet: tableSubnet, Limit: tableIPLimit},
+ log: log,
}
if err := tab.setFallbackNodes(bootnodes); err != nil {
return nil, err
@@ -468,10 +465,6 @@ func (tab *Table) addSeenNode(n *node) {
return
}
- if tab.nodeIsValidFn != nil && !tab.nodeIsValidFn(n.Node) {
- return
- }
-
tab.mutex.Lock()
defer tab.mutex.Unlock()
b := tab.bucket(n.ID())
@@ -514,10 +507,6 @@ func (tab *Table) addVerifiedNode(n *node) {
return
}
- if tab.nodeIsValidFn != nil && !tab.nodeIsValidFn(n.Node) {
- return
- }
-
tab.mutex.Lock()
defer tab.mutex.Unlock()
b := tab.bucket(n.ID())
@@ -683,15 +672,14 @@ func (h *nodesByDistance) push(n *node, maxElems int) {
ix := sort.Search(len(h.entries), func(i int) bool {
return enode.DistCmp(h.target, h.entries[i].ID(), n.ID()) > 0
})
+
+ end := len(h.entries)
if len(h.entries) < maxElems {
h.entries = append(h.entries, n)
}
- if ix == len(h.entries) {
- // farther away than all nodes we already have.
- // if there was room for it, the node is now the last element.
- } else {
- // slide existing entries down to make room
- // this will overwrite the entry we just appended.
+ if ix < end {
+ // Slide existing entries down to make room.
+ // This will overwrite the entry we just appended.
copy(h.entries[ix+1:], h.entries[ix:])
h.entries[ix] = n
}
diff --git a/discover/table_test.go b/discover/table_test.go
index cbffdef..1ef63fe 100644
--- a/discover/table_test.go
+++ b/discover/table_test.go
@@ -314,18 +314,8 @@ func TestTable_addVerifiedNode(t *testing.T) {
// Insert two nodes.
n1 := nodeAtDistance(tab.self().ID(), 256, net.IP{88, 77, 66, 1})
n2 := nodeAtDistance(tab.self().ID(), 256, net.IP{88, 77, 66, 2})
- n3 := nodeAtDistance(tab.self().ID(), 256, net.IP{66, 77, 88, 3})
-
- // Check if node is valid before adding it
- validFN := func(node enode.Node) bool {
- return !node.IP().Equal(n3.IP()) // Node 3 is invalid
- }
-
- tab.nodeIsValidFn = validFN
-
tab.addSeenNode(n1)
tab.addSeenNode(n2)
- tab.addVerifiedNode(n3)
// Verify bucket content:
bcontent := []*node{n1, n2}
@@ -353,24 +343,14 @@ func TestTable_addSeenNode(t *testing.T) {
defer db.Close()
defer tab.close()
- // Insert three nodes.
+ // Insert two nodes.
n1 := nodeAtDistance(tab.self().ID(), 256, net.IP{88, 77, 66, 1})
n2 := nodeAtDistance(tab.self().ID(), 256, net.IP{88, 77, 66, 2})
- n3 := nodeAtDistance(tab.self().ID(), 256, net.IP{66, 77, 88, 3})
-
- // Check if node is valid before adding it
- validFN := func(node enode.Node) bool {
- return !node.IP().Equal(n3.IP()) // Node 3 is invalid
- }
-
- tab.nodeIsValidFn = validFN
-
tab.addSeenNode(n1)
tab.addSeenNode(n2)
- tab.addSeenNode(n3)
// Verify bucket content:
- bcontent := []*node{n1, n2} // n3 shouldnt have been added
+ bcontent := []*node{n1, n2}
if !reflect.DeepEqual(tab.bucket(n1.ID()).entries, bcontent) {
t.Fatalf("wrong bucket content: %v", tab.bucket(n1.ID()).entries)
}
@@ -416,6 +396,59 @@ func TestTable_revalidateSyncRecord(t *testing.T) {
}
}
+func TestNodesPush(t *testing.T) {
+ var target enode.ID
+ n1 := nodeAtDistance(target, 255, intIP(1))
+ n2 := nodeAtDistance(target, 254, intIP(2))
+ n3 := nodeAtDistance(target, 253, intIP(3))
+ perm := [][]*node{
+ {n3, n2, n1},
+ {n3, n1, n2},
+ {n2, n3, n1},
+ {n2, n1, n3},
+ {n1, n3, n2},
+ {n1, n2, n3},
+ }
+
+ // Insert all permutations into lists with size limit 3.
+ for _, nodes := range perm {
+ list := nodesByDistance{target: target}
+ for _, n := range nodes {
+ list.push(n, 3)
+ }
+ if !slicesEqual(list.entries, perm[0], nodeIDEqual) {
+ t.Fatal("not equal")
+ }
+ }
+
+ // Insert all permutations into lists with size limit 2.
+ for _, nodes := range perm {
+ list := nodesByDistance{target: target}
+ for _, n := range nodes {
+ list.push(n, 2)
+ }
+ if !slicesEqual(list.entries, perm[0][:2], nodeIDEqual) {
+ t.Fatal("not equal")
+ }
+ }
+}
+
+func nodeIDEqual(n1, n2 *node) bool {
+ return n1.ID() == n2.ID()
+}
+
+func slicesEqual[T any](s1, s2 []T, check func(e1, e2 T) bool) bool {
+ if len(s1) != len(s2) {
+ return false
+ }
+ for i := range s1 {
+ if !check(s1[i], s2[i]) {
+ return false
+ }
+ }
+ return true
+}
+
// gen wraps quick.Value so it's easier to use.
// it generates a random value of the given value's type.
func gen(typ interface{}, rand *rand.Rand) interface{} {
diff --git a/discover/table_util_test.go b/discover/table_util_test.go
index cdef6cd..527afbb 100644
--- a/discover/table_util_test.go
+++ b/discover/table_util_test.go
@@ -43,7 +43,7 @@ func init() {
func newTestTable(t transport) (*Table, *enode.DB) {
db, _ := enode.OpenDB("")
- tab, _ := newTable(t, db, nil, nil, log.Root())
+ tab, _ := newTable(t, db, nil, log.Root())
go tab.loop()
return tab, db
}
@@ -52,6 +52,7 @@ func newTestTable(t transport) (*Table, *enode.DB) {
func nodeAtDistance(base enode.ID, ld int, ip net.IP) *node {
var r enr.Record
r.Set(enr.IP(ip))
+ r.Set(enr.UDP(30303))
return wrapNode(enode.SignNull(&r, idAtDistance(base, ld)))
}
@@ -174,7 +175,7 @@ func (t *pingRecorder) RequestENR(n *enode.Node) (*enode.Node, error) {
}
func hasDuplicates(slice []*node) bool {
- seen := make(map[enode.ID]bool)
+ seen := make(map[enode.ID]bool, len(slice))
for i, e := range slice {
if e == nil {
panic(fmt.Sprintf("nil *Node at %d", i))
diff --git a/discover/v4_udp.go b/discover/v4_udp.go
index 00988c5..de8ecb3 100644
--- a/discover/v4_udp.go
+++ b/discover/v4_udp.go
@@ -130,7 +130,7 @@ func ListenV4(c UDPConn, ln *enode.LocalNode, cfg Config) (*UDPv4, error) {
cfg = cfg.withDefaults()
closeCtx, cancel := context.WithCancel(context.Background())
t := &UDPv4{
- conn: c,
+ conn: newMeteredConn(c),
priv: cfg.PrivateKey,
netrestrict: cfg.NetRestrict,
localNode: ln,
@@ -142,7 +142,7 @@ func ListenV4(c UDPConn, ln *enode.LocalNode, cfg Config) (*UDPv4, error) {
log: cfg.Log,
}
- tab, err := newTable(t, ln.Database(), cfg.Bootnodes, cfg.ValidNodeFn, t.log)
+ tab, err := newTable(t, ln.Database(), cfg.Bootnodes, t.log)
if err != nil {
return nil, err
}
diff --git a/discover/v4_udp_test.go b/discover/v4_udp_test.go
index bb6dc1c..aeacdc2 100644
--- a/discover/v4_udp_test.go
+++ b/discover/v4_udp_test.go
@@ -165,7 +165,6 @@ func TestUDPv4_responseTimeouts(t *testing.T) {
test := newUDPTest(t)
defer test.close()
- rand.Seed(time.Now().UnixNano())
randomDuration := func(max time.Duration) time.Duration {
return time.Duration(rand.Int63n(int64(max)))
}
diff --git a/discover/v5_talk.go b/discover/v5_talk.go
new file mode 100644
index 0000000..e71d83a
--- /dev/null
+++ b/discover/v5_talk.go
@@ -0,0 +1,113 @@
+// Copyright 2023 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see .
+
+package discover
+
+import (
+ "net"
+ "sync"
+ "time"
+
+ "github.com/ethereum/go-ethereum/log"
+ "github.com/ethereum/go-ethereum/p2p/enode"
+ "github.com/waku-org/go-discover/discover/v5wire"
+)
+
+// This is a limit for the number of concurrent talk requests.
+const maxActiveTalkRequests = 1024
+
+// This is the timeout for acquiring a handler execution slot for a talk request.
+// The timeout should be short enough to fit within the request timeout.
+const talkHandlerLaunchTimeout = 400 * time.Millisecond
+
+// TalkRequestHandler callback processes a talk request and returns a response.
+//
+// Note that talk handlers are expected to come up with a response very quickly, within at
+// most 200ms or so. If the handler takes longer than that, the remote end may time out
+// and wont receive the response.
+type TalkRequestHandler func(enode.ID, *net.UDPAddr, []byte) []byte
+
+type talkSystem struct {
+ transport *UDPv5
+
+ mutex sync.Mutex
+ handlers map[string]TalkRequestHandler
+ slots chan struct{}
+ lastLog time.Time
+ dropCount int
+}
+
+func newTalkSystem(transport *UDPv5) *talkSystem {
+ t := &talkSystem{
+ transport: transport,
+ handlers: make(map[string]TalkRequestHandler),
+ slots: make(chan struct{}, maxActiveTalkRequests),
+ }
+ for i := 0; i < cap(t.slots); i++ {
+ t.slots <- struct{}{}
+ }
+ return t
+}
+
+// register adds a protocol handler.
+func (t *talkSystem) register(protocol string, handler TalkRequestHandler) {
+ t.mutex.Lock()
+ t.handlers[protocol] = handler
+ t.mutex.Unlock()
+}
+
+// handleRequest handles a talk request.
+func (t *talkSystem) handleRequest(id enode.ID, addr *net.UDPAddr, req *v5wire.TalkRequest) {
+ t.mutex.Lock()
+ handler, ok := t.handlers[req.Protocol]
+ t.mutex.Unlock()
+
+ if !ok {
+ resp := &v5wire.TalkResponse{ReqID: req.ReqID}
+ t.transport.sendResponse(id, addr, resp)
+ return
+ }
+
+ // Wait for a slot to become available, then run the handler.
+ timeout := time.NewTimer(talkHandlerLaunchTimeout)
+ defer timeout.Stop()
+ select {
+ case <-t.slots:
+ go func() {
+ defer func() { t.slots <- struct{}{} }()
+ respMessage := handler(id, addr, req.Message)
+ resp := &v5wire.TalkResponse{ReqID: req.ReqID, Message: respMessage}
+ t.transport.sendFromAnotherThread(id, addr, resp)
+ }()
+ case <-timeout.C:
+ // Couldn't get it in time, drop the request.
+ if time.Since(t.lastLog) > 5*time.Second {
+ log.Warn("Dropping TALKREQ due to overload", "ndrop", t.dropCount)
+ t.lastLog = time.Now()
+ t.dropCount++
+ }
+ case <-t.transport.closeCtx.Done():
+ // Transport closed, drop the request.
+ }
+}
+
+// wait blocks until all active requests have finished, and prevents new request
+// handlers from being launched.
+func (t *talkSystem) wait() {
+ for i := 0; i < cap(t.slots); i++ {
+ <-t.slots
+ }
+}
diff --git a/discover/v5_udp.go b/discover/v5_udp.go
index dea1293..7829f7a 100644
--- a/discover/v5_udp.go
+++ b/discover/v5_udp.go
@@ -24,25 +24,22 @@ import (
"errors"
"fmt"
"io"
- "math"
"net"
"sync"
"time"
- "github.com/waku-org/go-discover/discover/v5wire"
-
"github.com/ethereum/go-ethereum/common/mclock"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/p2p/enode"
"github.com/ethereum/go-ethereum/p2p/enr"
"github.com/ethereum/go-ethereum/p2p/netutil"
+ "github.com/waku-org/go-discover/discover/v5wire"
)
const (
lookupRequestLimit = 3 // max requests against a single node during lookup
findnodeResultLimit = 16 // applies in FINDNODE handler
totalNodesResponseLimit = 5 // applies in waitForNodes
- nodesResponseItemLimit = 3 // applies in sendNodes
respTimeoutV5 = 700 * time.Millisecond
)
@@ -73,9 +70,11 @@ type UDPv5 struct {
clock mclock.Clock
validSchemes enr.IdentityScheme
+ // misc buffers used during message handling
+ logcontext []interface{}
+
// talkreq handler registry
- trlock sync.Mutex
- trhandlers map[string]TalkRequestHandler
+ talk *talkSystem
// channels into dispatch
packetInCh chan ReadPacket
@@ -83,6 +82,8 @@ type UDPv5 struct {
callCh chan *callV5
callDoneCh chan *callV5
respTimeoutCh chan *callTimeout
+ sendCh chan sendRequest
+ unhandled chan<- ReadPacket
// state of dispatch
codec codecV5
@@ -97,12 +98,18 @@ type UDPv5 struct {
wg sync.WaitGroup
}
-// TalkRequestHandler callback processes a talk request and optionally returns a reply
-type TalkRequestHandler func(enode.ID, *net.UDPAddr, []byte) []byte
+type sendRequest struct {
+ destID enode.ID
+ destAddr *net.UDPAddr
+ msg v5wire.Packet
+}
// callV5 represents a remote procedure call against another node.
type callV5 struct {
- node *enode.Node
+ id enode.ID
+ addr *net.UDPAddr
+ node *enode.Node // This is required to perform handshakes.
+
packet v5wire.Packet
responseType byte // expected packet type of response
reqid []byte
@@ -141,7 +148,7 @@ func newUDPv5(conn UDPConn, ln *enode.LocalNode, cfg Config) (*UDPv5, error) {
cfg = cfg.withDefaults()
t := &UDPv5{
// static fields
- conn: conn,
+ conn: newMeteredConn(conn),
localNode: ln,
db: ln.Database(),
netrestrict: cfg.NetRestrict,
@@ -149,15 +156,16 @@ func newUDPv5(conn UDPConn, ln *enode.LocalNode, cfg Config) (*UDPv5, error) {
log: cfg.Log,
validSchemes: cfg.ValidSchemes,
clock: cfg.Clock,
- trhandlers: make(map[string]TalkRequestHandler),
// channels into dispatch
packetInCh: make(chan ReadPacket, 1),
readNextCh: make(chan struct{}, 1),
callCh: make(chan *callV5),
callDoneCh: make(chan *callV5),
+ sendCh: make(chan sendRequest),
respTimeoutCh: make(chan *callTimeout),
+ unhandled: cfg.Unhandled,
// state of dispatch
- codec: v5wire.NewCodec(ln, cfg.PrivateKey, cfg.Clock, *cfg.V5Config.ProtocolID),
+ codec: v5wire.NewCodec(ln, cfg.PrivateKey, cfg.Clock, cfg.V5ProtocolID),
activeCallByNode: make(map[enode.ID]*callV5),
activeCallByAuth: make(map[v5wire.Nonce]*callV5),
callQueue: make(map[enode.ID][]*callV5),
@@ -165,7 +173,8 @@ func newUDPv5(conn UDPConn, ln *enode.LocalNode, cfg Config) (*UDPv5, error) {
closeCtx: closeCtx,
cancelCloseCtx: cancelCloseCtx,
}
- tab, err := newTable(t, t.db, cfg.Bootnodes, cfg.ValidNodeFn, cfg.Log)
+ t.talk = newTalkSystem(t)
+ tab, err := newTable(t, t.db, cfg.Bootnodes, cfg.Log)
if err != nil {
return nil, err
}
@@ -183,6 +192,7 @@ func (t *UDPv5) Close() {
t.closeOnce.Do(func() {
t.cancelCloseCtx()
t.conn.Close()
+ t.talk.wait()
t.wg.Wait()
t.tab.close()
})
@@ -238,15 +248,26 @@ func (t *UDPv5) LocalNode() *enode.LocalNode {
// whenever a request for the given protocol is received and should return the response
// data or nil.
func (t *UDPv5) RegisterTalkHandler(protocol string, handler TalkRequestHandler) {
- t.trlock.Lock()
- defer t.trlock.Unlock()
- t.trhandlers[protocol] = handler
+ t.talk.register(protocol, handler)
}
-// TalkRequest sends a talk request to n and waits for a response.
+// TalkRequest sends a talk request to a node and waits for a response.
func (t *UDPv5) TalkRequest(n *enode.Node, protocol string, request []byte) ([]byte, error) {
req := &v5wire.TalkRequest{Protocol: protocol, Message: request}
- resp := t.call(n, v5wire.TalkResponseMsg, req)
+ resp := t.callToNode(n, v5wire.TalkResponseMsg, req)
+ defer t.callDone(resp)
+ select {
+ case respMsg := <-resp.ch:
+ return respMsg.(*v5wire.TalkResponse).Message, nil
+ case err := <-resp.err:
+ return nil, err
+ }
+}
+
+// TalkRequestToID sends a talk request to a node and waits for a response.
+func (t *UDPv5) TalkRequestToID(id enode.ID, addr *net.UDPAddr, protocol string, request []byte) ([]byte, error) {
+ req := &v5wire.TalkRequest{Protocol: protocol, Message: request}
+ resp := t.callToID(id, addr, v5wire.TalkResponseMsg, req)
defer t.callDone(resp)
select {
case respMsg := <-resp.ch:
@@ -324,7 +345,7 @@ func lookupDistances(target, dest enode.ID) (dists []uint) {
td := enode.LogDist(target, dest)
dists = append(dists, uint(td))
for i := 1; len(dists) < lookupRequestLimit; i++ {
- if td+i < 256 {
+ if td+i <= 256 {
dists = append(dists, uint(td+i))
}
if td-i > 0 {
@@ -337,7 +358,7 @@ func lookupDistances(target, dest enode.ID) (dists []uint) {
// ping calls PING on a node and waits for a PONG response.
func (t *UDPv5) ping(n *enode.Node) (uint64, error) {
req := &v5wire.Ping{ENRSeq: t.localNode.Node().Seq()}
- resp := t.call(n, v5wire.PongMsg, req)
+ resp := t.callToNode(n, v5wire.PongMsg, req)
defer t.callDone(resp)
select {
@@ -362,7 +383,7 @@ func (t *UDPv5) RequestENR(n *enode.Node) (*enode.Node, error) {
// findnode calls FINDNODE on a node and waits for responses.
func (t *UDPv5) findnode(n *enode.Node, distances []uint) ([]*enode.Node, error) {
- resp := t.call(n, v5wire.NodesMsg, &v5wire.Findnode{Distances: distances})
+ resp := t.callToNode(n, v5wire.NodesMsg, &v5wire.Findnode{Distances: distances})
return t.waitForNodes(resp, distances)
}
@@ -388,7 +409,7 @@ func (t *UDPv5) waitForNodes(c *callV5, distances []uint) ([]*enode.Node, error)
nodes = append(nodes, node)
}
if total == -1 {
- total = min(int(response.Total), totalNodesResponseLimit)
+ total = min(int(response.RespCount), totalNodesResponseLimit)
}
if received++; received == total {
return nodes, nil
@@ -405,17 +426,17 @@ func (t *UDPv5) verifyResponseNode(c *callV5, r *enr.Record, distances []uint, s
if err != nil {
return nil, err
}
- if err := netutil.CheckRelayIP(c.node.IP(), node.IP()); err != nil {
+ if err := netutil.CheckRelayIP(c.addr.IP, node.IP()); err != nil {
return nil, err
}
if t.netrestrict != nil && !t.netrestrict.Contains(node.IP()) {
return nil, errors.New("not contained in netrestrict list")
}
- if c.node.UDP() <= 1024 {
+ if node.UDP() <= 1024 {
return nil, errLowPort
}
if distances != nil {
- nd := enode.LogDist(c.node.ID(), node.ID())
+ nd := enode.LogDist(c.id, node.ID())
if !containsUint(uint(nd), distances) {
return nil, errors.New("does not match any requested distance")
}
@@ -436,17 +457,28 @@ func containsUint(x uint, xs []uint) bool {
return false
}
-// call sends the given call and sets up a handler for response packets (of message type
-// responseType). Responses are dispatched to the call's response channel.
-func (t *UDPv5) call(node *enode.Node, responseType byte, packet v5wire.Packet) *callV5 {
- c := &callV5{
- node: node,
- packet: packet,
- responseType: responseType,
- reqid: make([]byte, 8),
- ch: make(chan v5wire.Packet, 1),
- err: make(chan error, 1),
- }
+// callToNode sends the given call and sets up a handler for response packets (of message
+// type responseType). Responses are dispatched to the call's response channel.
+func (t *UDPv5) callToNode(n *enode.Node, responseType byte, req v5wire.Packet) *callV5 {
+ addr := &net.UDPAddr{IP: n.IP(), Port: n.UDP()}
+ c := &callV5{id: n.ID(), addr: addr, node: n}
+ t.initCall(c, responseType, req)
+ return c
+}
+
+// callToID is like callToNode, but for cases where the node record is not available.
+func (t *UDPv5) callToID(id enode.ID, addr *net.UDPAddr, responseType byte, req v5wire.Packet) *callV5 {
+ c := &callV5{id: id, addr: addr}
+ t.initCall(c, responseType, req)
+ return c
+}
+
+func (t *UDPv5) initCall(c *callV5, responseType byte, packet v5wire.Packet) {
+ c.packet = packet
+ c.responseType = responseType
+ c.reqid = make([]byte, 8)
+ c.ch = make(chan v5wire.Packet, 1)
+ c.err = make(chan error, 1)
// Assign request ID.
crand.Read(c.reqid)
packet.SetRequestID(c.reqid)
@@ -456,7 +488,6 @@ func (t *UDPv5) call(node *enode.Node, responseType byte, packet v5wire.Packet)
case <-t.closeCtx.Done():
c.err <- errClosed
}
- return c
}
// callDone tells dispatch that the active call is done.
@@ -498,26 +529,27 @@ func (t *UDPv5) dispatch() {
for {
select {
case c := <-t.callCh:
- id := c.node.ID()
- t.callQueue[id] = append(t.callQueue[id], c)
- t.sendNextCall(id)
+ t.callQueue[c.id] = append(t.callQueue[c.id], c)
+ t.sendNextCall(c.id)
case ct := <-t.respTimeoutCh:
- active := t.activeCallByNode[ct.c.node.ID()]
+ active := t.activeCallByNode[ct.c.id]
if ct.c == active && ct.timer == active.timeout {
ct.c.err <- errTimeout
}
case c := <-t.callDoneCh:
- id := c.node.ID()
- active := t.activeCallByNode[id]
+ active := t.activeCallByNode[c.id]
if active != c {
panic("BUG: callDone for inactive call")
}
c.timeout.Stop()
delete(t.activeCallByAuth, c.nonce)
- delete(t.activeCallByNode, id)
- t.sendNextCall(id)
+ delete(t.activeCallByNode, c.id)
+ t.sendNextCall(c.id)
+
+ case r := <-t.sendCh:
+ t.send(r.destID, r.destAddr, r.msg, nil)
case p := <-t.packetInCh:
t.handlePacket(p.Data, p.Addr)
@@ -587,8 +619,7 @@ func (t *UDPv5) sendCall(c *callV5) {
delete(t.activeCallByAuth, c.nonce)
}
- addr := &net.UDPAddr{IP: c.node.IP(), Port: c.node.UDP()}
- newNonce, _ := t.send(c.node.ID(), addr, c.packet, c.challenge)
+ newNonce, _ := t.send(c.id, c.addr, c.packet, c.challenge)
c.nonce = newNonce
t.activeCallByAuth[newNonce] = c
t.startResponseTimeout(c)
@@ -601,16 +632,28 @@ func (t *UDPv5) sendResponse(toID enode.ID, toAddr *net.UDPAddr, packet v5wire.P
return err
}
+func (t *UDPv5) sendFromAnotherThread(toID enode.ID, toAddr *net.UDPAddr, packet v5wire.Packet) {
+ select {
+ case t.sendCh <- sendRequest{toID, toAddr, packet}:
+ case <-t.closeCtx.Done():
+ }
+}
+
// send sends a packet to the given node.
func (t *UDPv5) send(toID enode.ID, toAddr *net.UDPAddr, packet v5wire.Packet, c *v5wire.Whoareyou) (v5wire.Nonce, error) {
addr := toAddr.String()
+ t.logcontext = append(t.logcontext[:0], "id", toID, "addr", addr)
+ t.logcontext = packet.AppendLogInfo(t.logcontext)
+
enc, nonce, err := t.codec.Encode(toID, addr, packet, c)
if err != nil {
- t.log.Warn(">> "+packet.Name(), "id", toID, "addr", addr, "err", err)
+ t.logcontext = append(t.logcontext, "err", err)
+ t.log.Warn(">> "+packet.Name(), t.logcontext...)
return nonce, err
}
+
_, err = t.conn.WriteToUDP(enc, toAddr)
- t.log.Trace(">> "+packet.Name(), "id", toID, "addr", addr)
+ t.log.Trace(">> "+packet.Name(), t.logcontext...)
return nonce, err
}
@@ -651,6 +694,14 @@ func (t *UDPv5) handlePacket(rawpacket []byte, fromAddr *net.UDPAddr) error {
addr := fromAddr.String()
fromID, fromNode, packet, err := t.codec.Decode(rawpacket, addr)
if err != nil {
+ if t.unhandled != nil && v5wire.IsInvalidHeader(err) {
+ // The packet seems unrelated to discv5, send it to the next protocol.
+ // t.log.Trace("Unhandled discv5 packet", "id", fromID, "addr", addr, "err", err)
+ up := ReadPacket{Data: make([]byte, len(rawpacket)), Addr: fromAddr}
+ copy(up.Data, rawpacket)
+ t.unhandled <- up
+ return nil
+ }
t.log.Debug("Bad discv5 packet", "id", fromID, "addr", addr, "err", err)
return err
}
@@ -660,7 +711,9 @@ func (t *UDPv5) handlePacket(rawpacket []byte, fromAddr *net.UDPAddr) error {
}
if packet.Kind() != v5wire.WhoareyouPacket {
// WHOAREYOU logged separately to report errors.
- t.log.Trace("<< "+packet.Name(), "id", fromID, "addr", addr)
+ t.logcontext = append(t.logcontext[:0], "id", fromID, "addr", addr)
+ t.logcontext = packet.AppendLogInfo(t.logcontext)
+ t.log.Trace("<< "+packet.Name(), t.logcontext...)
}
t.handle(packet, fromID, fromAddr)
return nil
@@ -673,7 +726,7 @@ func (t *UDPv5) handleCallResponse(fromID enode.ID, fromAddr *net.UDPAddr, p v5w
t.log.Debug(fmt.Sprintf("Unsolicited/late %s response", p.Name()), "id", fromID, "addr", fromAddr)
return false
}
- if !fromAddr.IP.Equal(ac.node.IP()) || fromAddr.Port != ac.node.UDP() {
+ if !fromAddr.IP.Equal(ac.addr.IP) || fromAddr.Port != ac.addr.Port {
t.log.Debug(fmt.Sprintf("%s from wrong endpoint", p.Name()), "id", fromID, "addr", fromAddr)
return false
}
@@ -715,7 +768,7 @@ func (t *UDPv5) handle(p v5wire.Packet, fromID enode.ID, fromAddr *net.UDPAddr)
case *v5wire.Nodes:
t.handleCallResponse(fromID, fromAddr, p)
case *v5wire.TalkRequest:
- t.handleTalkRequest(p, fromID, fromAddr)
+ t.talk.handleRequest(fromID, fromAddr, p)
case *v5wire.TalkResponse:
t.handleCallResponse(fromID, fromAddr, p)
}
@@ -745,6 +798,12 @@ func (t *UDPv5) handleWhoareyou(p *v5wire.Whoareyou, fromID enode.ID, fromAddr *
return
}
+ if c.node == nil {
+ // Can't perform handshake because we don't have the ENR.
+ t.log.Debug("Can't handle "+p.Name(), "addr", fromAddr, "err", "call has no ENR")
+ c.err <- errors.New("remote wants handshake, but call has no ENR")
+ return
+ }
// Resend the call that was answered by WHOAREYOU.
t.log.Trace("<< "+p.Name(), "id", c.node.ID(), "addr", fromAddr)
c.handshakeCount++
@@ -830,20 +889,32 @@ func (t *UDPv5) collectTableNodes(rip net.IP, distances []uint, limit int) []*en
// packNodes creates NODES response packets for the given node list.
func packNodes(reqid []byte, nodes []*enode.Node) []*v5wire.Nodes {
if len(nodes) == 0 {
- return []*v5wire.Nodes{{ReqID: reqid, Total: 1}}
+ return []*v5wire.Nodes{{ReqID: reqid, RespCount: 1}}
}
- total := uint8(math.Ceil(float64(len(nodes)) / 3))
+ // This limit represents the available space for nodes in output packets. Maximum
+ // packet size is 1280, and out of this ~80 bytes will be taken up by the packet
+ // frame. So limiting to 1000 bytes here leaves 200 bytes for other fields of the
+ // NODES message, which is a lot.
+ const sizeLimit = 1000
+
var resp []*v5wire.Nodes
for len(nodes) > 0 {
- p := &v5wire.Nodes{ReqID: reqid, Total: total}
- items := min(nodesResponseItemLimit, len(nodes))
- for i := 0; i < items; i++ {
- p.Nodes = append(p.Nodes, nodes[i].Record())
+ p := &v5wire.Nodes{ReqID: reqid}
+ size := uint64(0)
+ for len(nodes) > 0 {
+ r := nodes[0].Record()
+ if size += r.Size(); size > sizeLimit {
+ break
+ }
+ p.Nodes = append(p.Nodes, r)
+ nodes = nodes[1:]
}
- nodes = nodes[items:]
resp = append(resp, p)
}
+ for _, msg := range resp {
+ msg.RespCount = uint8(len(resp))
+ }
return resp
}
@@ -857,17 +928,3 @@ func (t *UDPv5) SetFallbackNodes(nodes []*enode.Node) error {
<-refreshDone
return nil
}
-
-// handleTalkRequest runs the talk request handler of the requested protocol.
-func (t *UDPv5) handleTalkRequest(p *v5wire.TalkRequest, fromID enode.ID, fromAddr *net.UDPAddr) {
- t.trlock.Lock()
- handler := t.trhandlers[p.Protocol]
- t.trlock.Unlock()
-
- var response []byte
- if handler != nil {
- response = handler(fromID, fromAddr, p.Message)
- }
- resp := &v5wire.TalkResponse{ReqID: p.ReqID, Message: response}
- t.sendResponse(fromID, fromAddr, resp)
-}
diff --git a/discover/v5_udp_test.go b/discover/v5_udp_test.go
index 2261499..dbf162f 100644
--- a/discover/v5_udp_test.go
+++ b/discover/v5_udp_test.go
@@ -32,6 +32,7 @@ import (
"github.com/ethereum/go-ethereum/p2p/enode"
"github.com/ethereum/go-ethereum/p2p/enr"
"github.com/ethereum/go-ethereum/rlp"
+ "github.com/stretchr/testify/require"
"github.com/waku-org/go-discover/discover/v5wire"
"github.com/waku-org/go-discover/internal/testlog"
)
@@ -160,7 +161,7 @@ func TestUDPv5_findnodeHandling(t *testing.T) {
defer test.close()
// Create test nodes and insert them into the table.
- nodes253 := nodesAtDistance(test.table.self().ID(), 253, 10)
+ nodes253 := nodesAtDistance(test.table.self().ID(), 253, 16)
nodes249 := nodesAtDistance(test.table.self().ID(), 249, 4)
nodes248 := nodesAtDistance(test.table.self().ID(), 248, 10)
fillTable(test.table, wrapNodes(nodes253))
@@ -185,7 +186,7 @@ func TestUDPv5_findnodeHandling(t *testing.T) {
// This request gets all the distance-253 nodes.
test.packetIn(&v5wire.Findnode{ReqID: []byte{4}, Distances: []uint{253}})
- test.expectNodes([]byte{4}, 4, nodes253)
+ test.expectNodes([]byte{4}, 2, nodes253)
// This request gets all the distance-249 nodes and some more at 248 because
// the bucket at 249 is not full.
@@ -193,11 +194,11 @@ func TestUDPv5_findnodeHandling(t *testing.T) {
var nodes []*enode.Node
nodes = append(nodes, nodes249...)
nodes = append(nodes, nodes248[:10]...)
- test.expectNodes([]byte{5}, 5, nodes)
+ test.expectNodes([]byte{5}, 1, nodes)
}
func (test *udpV5Test) expectNodes(wantReqID []byte, wantTotal uint8, wantNodes []*enode.Node) {
- nodeSet := make(map[enode.ID]*enr.Record)
+ nodeSet := make(map[enode.ID]*enr.Record, len(wantNodes))
for _, n := range wantNodes {
nodeSet[n.ID()] = n.Record()
}
@@ -207,11 +208,8 @@ func (test *udpV5Test) expectNodes(wantReqID []byte, wantTotal uint8, wantNodes
if !bytes.Equal(p.ReqID, wantReqID) {
test.t.Fatalf("wrong request ID %v in response, want %v", p.ReqID, wantReqID)
}
- if len(p.Nodes) > 3 {
- test.t.Fatalf("too many nodes in response")
- }
- if p.Total != wantTotal {
- test.t.Fatalf("wrong total response count %d, want %d", p.Total, wantTotal)
+ if p.RespCount != wantTotal {
+ test.t.Fatalf("wrong total response count %d, want %d", p.RespCount, wantTotal)
}
for _, record := range p.Nodes {
n, _ := enode.New(enode.ValidSchemesForTesting, record)
@@ -303,14 +301,14 @@ func TestUDPv5_findnodeCall(t *testing.T) {
t.Fatalf("wrong distances in request: %v", p.Distances)
}
test.packetIn(&v5wire.Nodes{
- ReqID: p.ReqID,
- Total: 2,
- Nodes: nodesToRecords(nodes[:4]),
+ ReqID: p.ReqID,
+ RespCount: 2,
+ Nodes: nodesToRecords(nodes[:4]),
})
test.packetIn(&v5wire.Nodes{
- ReqID: p.ReqID,
- Total: 2,
- Nodes: nodesToRecords(nodes[4:]),
+ ReqID: p.ReqID,
+ RespCount: 2,
+ Nodes: nodesToRecords(nodes[4:]),
})
})
@@ -411,16 +409,16 @@ func TestUDPv5_callTimeoutReset(t *testing.T) {
test.waitPacketOut(func(p *v5wire.Findnode, addr *net.UDPAddr, _ v5wire.Nonce) {
time.Sleep(respTimeout - 50*time.Millisecond)
test.packetIn(&v5wire.Nodes{
- ReqID: p.ReqID,
- Total: 2,
- Nodes: nodesToRecords(nodes[:4]),
+ ReqID: p.ReqID,
+ RespCount: 2,
+ Nodes: nodesToRecords(nodes[:4]),
})
time.Sleep(respTimeout - 50*time.Millisecond)
test.packetIn(&v5wire.Nodes{
- ReqID: p.ReqID,
- Total: 2,
- Nodes: nodesToRecords(nodes[4:]),
+ ReqID: p.ReqID,
+ RespCount: 2,
+ Nodes: nodesToRecords(nodes[4:]),
})
})
if err := <-done; err != nil {
@@ -517,6 +515,63 @@ func TestUDPv5_talkRequest(t *testing.T) {
if err := <-done; err != nil {
t.Fatal(err)
}
+
+ // Also check requesting without ENR.
+ go func() {
+ _, err := test.udp.TalkRequestToID(remote.ID(), test.remoteaddr, "test", []byte("test request 2"))
+ done <- err
+ }()
+ test.waitPacketOut(func(p *v5wire.TalkRequest, addr *net.UDPAddr, _ v5wire.Nonce) {
+ if p.Protocol != "test" {
+ t.Errorf("wrong protocol ID in talk request: %q", p.Protocol)
+ }
+ if string(p.Message) != "test request 2" {
+ t.Errorf("wrong message talk request: %q", p.Message)
+ }
+ test.packetInFrom(test.remotekey, test.remoteaddr, &v5wire.TalkResponse{
+ ReqID: p.ReqID,
+ Message: []byte("test response 2"),
+ })
+ })
+ if err := <-done; err != nil {
+ t.Fatal(err)
+ }
+}
+
+// This test checks that lookupDistances works.
+func TestUDPv5_lookupDistances(t *testing.T) {
+ test := newUDPV5Test(t)
+ lnID := test.table.self().ID()
+
+ t.Run("target distance of 1", func(t *testing.T) {
+ node := nodeAtDistance(lnID, 1, intIP(0))
+ dists := lookupDistances(lnID, node.ID())
+ require.Equal(t, []uint{1, 2, 3}, dists)
+ })
+
+ t.Run("target distance of 2", func(t *testing.T) {
+ node := nodeAtDistance(lnID, 2, intIP(0))
+ dists := lookupDistances(lnID, node.ID())
+ require.Equal(t, []uint{2, 3, 1}, dists)
+ })
+
+ t.Run("target distance of 128", func(t *testing.T) {
+ node := nodeAtDistance(lnID, 128, intIP(0))
+ dists := lookupDistances(lnID, node.ID())
+ require.Equal(t, []uint{128, 129, 127}, dists)
+ })
+
+ t.Run("target distance of 255", func(t *testing.T) {
+ node := nodeAtDistance(lnID, 255, intIP(0))
+ dists := lookupDistances(lnID, node.ID())
+ require.Equal(t, []uint{255, 256, 254}, dists)
+ })
+
+ t.Run("target distance of 256", func(t *testing.T) {
+ node := nodeAtDistance(lnID, 256, intIP(0))
+ dists := lookupDistances(lnID, node.ID())
+ require.Equal(t, []uint{256, 255, 254}, dists)
+ })
}
// This test checks that lookup works.
diff --git a/discover/v5wire/encoding.go b/discover/v5wire/encoding.go
index 47e8dcd..5108910 100644
--- a/discover/v5wire/encoding.go
+++ b/discover/v5wire/encoding.go
@@ -65,7 +65,7 @@ type (
handshakeAuthData struct {
h struct {
SrcID enode.ID
- SigSize byte // ignature data
+ SigSize byte // signature data
PubkeySize byte // offset of
}
// Trailing variable-size data.
@@ -94,6 +94,8 @@ const (
// Should reject packets smaller than minPacketSize.
minPacketSize = 63
+ maxPacketSize = 1280
+
minMessageSize = 48 // this refers to data after static headers
randomPacketMsgSize = 20
)
@@ -122,6 +124,13 @@ var (
ErrInvalidReqID = errors.New("request ID larger than 8 bytes")
)
+// IsInvalidHeader reports whether 'err' is related to an invalid packet header. When it
+// returns false, it is pretty certain that the packet causing the error does not belong
+// to discv5.
+func IsInvalidHeader(err error) bool {
+ return err == errTooShort || err == errInvalidHeader || err == errMsgTooShort
+}
+
// Packet sizes.
var (
sizeofStaticHeader = binary.Size(StaticHeader{})
@@ -147,17 +156,22 @@ type Codec struct {
msgctbuf []byte // message data ciphertext
// decoder buffer
+ decbuf []byte
reader bytes.Reader
}
// NewCodec creates a wire codec.
-func NewCodec(ln *enode.LocalNode, key *ecdsa.PrivateKey, clock mclock.Clock, protocolID [6]byte) *Codec {
+func NewCodec(ln *enode.LocalNode, key *ecdsa.PrivateKey, clock mclock.Clock, protocolID *[6]byte) *Codec {
c := &Codec{
sha256: sha256.New(),
localnode: ln,
privkey: key,
sc: NewSessionCache(1024, clock),
- protocolID: protocolID,
+ protocolID: DefaultProtocolID,
+ decbuf: make([]byte, maxPacketSize),
+ }
+ if protocolID != nil {
+ c.protocolID = *protocolID
}
return c
}
@@ -421,10 +435,13 @@ func (c *Codec) encryptMessage(s *session, p Packet, head *Header, headerData []
}
// Decode decodes a discovery packet.
-func (c *Codec) Decode(input []byte, addr string) (src enode.ID, n *enode.Node, p Packet, err error) {
- if len(input) < minPacketSize {
+func (c *Codec) Decode(inputData []byte, addr string) (src enode.ID, n *enode.Node, p Packet, err error) {
+ if len(inputData) < minPacketSize {
return enode.ID{}, nil, nil, errTooShort
}
+ // Copy the packet to a tmp buffer to avoid modifying it.
+ c.decbuf = append(c.decbuf[:0], inputData...)
+ input := c.decbuf
// Unmask the static header.
var head Header
copy(head.IV[:], input[:sizeofMaskingIV])
@@ -531,7 +548,7 @@ func (c *Codec) decodeHandshake(fromAddr string, head *Header) (n *enode.Node, a
if err != nil {
return nil, auth, nil, errInvalidAuthKey
}
- // Derive sesssion keys.
+ // Derive session keys.
session := deriveKeys(sha256.New, c.privkey, ephkey, auth.h.SrcID, c.localnode.ID(), cdata)
session = session.keysFlipped()
return n, auth, session, nil
diff --git a/discover/v5wire/encoding_test.go b/discover/v5wire/encoding_test.go
index b62165f..a538731 100644
--- a/discover/v5wire/encoding_test.go
+++ b/discover/v5wire/encoding_test.go
@@ -92,7 +92,7 @@ func TestHandshake(t *testing.T) {
}
// A <- B NODES
- nodes, _ := net.nodeB.encode(t, net.nodeA, &Nodes{Total: 1})
+ nodes, _ := net.nodeB.encode(t, net.nodeA, &Nodes{RespCount: 1})
net.nodeA.expectDecode(t, NodesMsg, nodes)
}
@@ -150,7 +150,7 @@ func TestHandshake_norecord(t *testing.T) {
net.nodeB.expectDecode(t, FindnodeMsg, findnode)
// A <- B NODES
- nodes, _ := net.nodeB.encode(t, net.nodeA, &Nodes{Total: 1})
+ nodes, _ := net.nodeB.encode(t, net.nodeA, &Nodes{RespCount: 1})
net.nodeA.expectDecode(t, NodesMsg, nodes)
}
@@ -190,7 +190,7 @@ func TestHandshake_rekey(t *testing.T) {
net.nodeB.expectDecode(t, FindnodeMsg, findnode)
// A <- B NODES
- nodes, _ := net.nodeB.encode(t, net.nodeA, &Nodes{Total: 1})
+ nodes, _ := net.nodeB.encode(t, net.nodeA, &Nodes{RespCount: 1})
net.nodeA.expectDecode(t, NodesMsg, nodes)
}
@@ -225,7 +225,7 @@ func TestHandshake_rekey2(t *testing.T) {
net.nodeB.expectDecode(t, FindnodeMsg, findnode)
// A <- B NODES
- nodes, _ := net.nodeB.encode(t, net.nodeA, &Nodes{Total: 1})
+ nodes, _ := net.nodeB.encode(t, net.nodeA, &Nodes{RespCount: 1})
net.nodeA.expectDecode(t, NodesMsg, nodes)
}
@@ -518,7 +518,7 @@ func (n *handshakeTestNode) init(key *ecdsa.PrivateKey, ip net.IP, clock mclock.
db, _ := enode.OpenDB("")
n.ln = enode.NewLocalNode(db, key)
n.ln.SetStaticIP(ip)
- n.c = NewCodec(n.ln, key, clock, protocolID)
+ n.c = NewCodec(n.ln, key, clock, nil)
}
func (n *handshakeTestNode) encode(t testing.TB, to handshakeTestNode, p Packet) ([]byte, Nonce) {
diff --git a/discover/v5wire/msg.go b/discover/v5wire/msg.go
index 1316598..401db2f 100644
--- a/discover/v5wire/msg.go
+++ b/discover/v5wire/msg.go
@@ -20,6 +20,7 @@ import (
"fmt"
"net"
+ "github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/common/mclock"
"github.com/ethereum/go-ethereum/p2p/enode"
"github.com/ethereum/go-ethereum/p2p/enr"
@@ -32,6 +33,10 @@ type Packet interface {
Kind() byte // Kind returns the message type.
RequestID() []byte // Returns the request ID.
SetRequestID([]byte) // Sets the request ID.
+
+ // AppendLogInfo returns its argument 'ctx' with additional fields
+ // appended for logging purposes.
+ AppendLogInfo(ctx []interface{}) []interface{}
}
// Message types.
@@ -44,9 +49,6 @@ const (
TalkResponseMsg
RequestTicketMsg
TicketMsg
- RegtopicMsg
- RegconfirmationMsg
- TopicQueryMsg
UnknownPacket = byte(255) // any non-decryptable packet
WhoareyouPacket = byte(254) // the WHOAREYOU packet
@@ -59,7 +61,7 @@ type (
Nonce Nonce
}
- // Whoareyou contains the handshake challenge.
+ // WHOAREYOU contains the handshake challenge.
Whoareyou struct {
ChallengeData []byte // Encoded challenge
Nonce Nonce // Nonce of request packet
@@ -73,13 +75,13 @@ type (
sent mclock.AbsTime // for handshake GC.
}
- // Ping is sent during liveness checks.
+ // PING is sent during liveness checks.
Ping struct {
ReqID []byte
ENRSeq uint64
}
- // Pong is the reply to Ping.
+ // PONG is the reply to PING.
Pong struct {
ReqID []byte
ENRSeq uint64
@@ -87,62 +89,35 @@ type (
ToPort uint16 // packet, which provides a way to discover the external address (after NAT).
}
- // Findnode is a query for nodes in the given bucket.
+ // FINDNODE is a query for nodes in the given bucket.
Findnode struct {
ReqID []byte
Distances []uint
+
+ // OpID is for debugging purposes and is not part of the packet encoding.
+ // It identifies the 'operation' on behalf of which the request was sent.
+ OpID uint64 `rlp:"-"`
}
- // Nodes is the reply to Findnode and Topicquery.
+ // NODES is a response to FINDNODE.
Nodes struct {
- ReqID []byte
- Total uint8
- Nodes []*enr.Record
+ ReqID []byte
+ RespCount uint8 // total number of responses to the request
+ Nodes []*enr.Record
}
- // TalkRequest is an application-level request.
+ // TALKREQ is an application-level request.
TalkRequest struct {
ReqID []byte
Protocol string
Message []byte
}
- // TalkResponse is the reply to TalkRequest.
+ // TALKRESP is the reply to TALKREQ.
TalkResponse struct {
ReqID []byte
Message []byte
}
-
- // RequestTicket requests a ticket for a topic queue.
- RequestTicket struct {
- ReqID []byte
- Topic []byte
- }
-
- // Ticket is the response to RequestTicket.
- Ticket struct {
- ReqID []byte
- Ticket []byte
- }
-
- // Regtopic registers the sender in a topic queue using a ticket.
- Regtopic struct {
- ReqID []byte
- Ticket []byte
- ENR *enr.Record
- }
-
- // Regconfirmation is the reply to Regtopic.
- Regconfirmation struct {
- ReqID []byte
- Registered bool
- }
-
- // TopicQuery asks for nodes with the given topic.
- TopicQuery struct {
- ReqID []byte
- Topic []byte
- }
)
// DecodeMessage decodes the message body of a packet.
@@ -161,16 +136,6 @@ func DecodeMessage(ptype byte, body []byte) (Packet, error) {
dec = new(TalkRequest)
case TalkResponseMsg:
dec = new(TalkResponse)
- case RequestTicketMsg:
- dec = new(RequestTicket)
- case TicketMsg:
- dec = new(Ticket)
- case RegtopicMsg:
- dec = new(Regtopic)
- case RegconfirmationMsg:
- dec = new(Regconfirmation)
- case TopicQueryMsg:
- dec = new(TopicQuery)
default:
return nil, fmt.Errorf("unknown packet type %d", ptype)
}
@@ -188,62 +153,77 @@ func (*Whoareyou) Kind() byte { return WhoareyouPacket }
func (*Whoareyou) RequestID() []byte { return nil }
func (*Whoareyou) SetRequestID([]byte) {}
+func (*Whoareyou) AppendLogInfo(ctx []interface{}) []interface{} {
+ return ctx
+}
+
func (*Unknown) Name() string { return "UNKNOWN/v5" }
func (*Unknown) Kind() byte { return UnknownPacket }
func (*Unknown) RequestID() []byte { return nil }
func (*Unknown) SetRequestID([]byte) {}
+func (*Unknown) AppendLogInfo(ctx []interface{}) []interface{} {
+ return ctx
+}
+
func (*Ping) Name() string { return "PING/v5" }
func (*Ping) Kind() byte { return PingMsg }
func (p *Ping) RequestID() []byte { return p.ReqID }
func (p *Ping) SetRequestID(id []byte) { p.ReqID = id }
+func (p *Ping) AppendLogInfo(ctx []interface{}) []interface{} {
+ return append(ctx, "req", hexutil.Bytes(p.ReqID), "enrseq", p.ENRSeq)
+}
+
func (*Pong) Name() string { return "PONG/v5" }
func (*Pong) Kind() byte { return PongMsg }
func (p *Pong) RequestID() []byte { return p.ReqID }
func (p *Pong) SetRequestID(id []byte) { p.ReqID = id }
-func (*Findnode) Name() string { return "FINDNODE/v5" }
-func (*Findnode) Kind() byte { return FindnodeMsg }
+func (p *Pong) AppendLogInfo(ctx []interface{}) []interface{} {
+ return append(ctx, "req", hexutil.Bytes(p.ReqID), "enrseq", p.ENRSeq)
+}
+
+func (p *Findnode) Name() string { return "FINDNODE/v5" }
+func (p *Findnode) Kind() byte { return FindnodeMsg }
func (p *Findnode) RequestID() []byte { return p.ReqID }
func (p *Findnode) SetRequestID(id []byte) { p.ReqID = id }
+func (p *Findnode) AppendLogInfo(ctx []interface{}) []interface{} {
+ ctx = append(ctx, "req", hexutil.Bytes(p.ReqID))
+ if p.OpID != 0 {
+ ctx = append(ctx, "opid", p.OpID)
+ }
+ return ctx
+}
+
func (*Nodes) Name() string { return "NODES/v5" }
func (*Nodes) Kind() byte { return NodesMsg }
func (p *Nodes) RequestID() []byte { return p.ReqID }
func (p *Nodes) SetRequestID(id []byte) { p.ReqID = id }
+func (p *Nodes) AppendLogInfo(ctx []interface{}) []interface{} {
+ return append(ctx,
+ "req", hexutil.Bytes(p.ReqID),
+ "tot", p.RespCount,
+ "n", len(p.Nodes),
+ )
+}
+
func (*TalkRequest) Name() string { return "TALKREQ/v5" }
func (*TalkRequest) Kind() byte { return TalkRequestMsg }
func (p *TalkRequest) RequestID() []byte { return p.ReqID }
func (p *TalkRequest) SetRequestID(id []byte) { p.ReqID = id }
+func (p *TalkRequest) AppendLogInfo(ctx []interface{}) []interface{} {
+ return append(ctx, "proto", p.Protocol, "req", hexutil.Bytes(p.ReqID), "len", len(p.Message))
+}
+
func (*TalkResponse) Name() string { return "TALKRESP/v5" }
func (*TalkResponse) Kind() byte { return TalkResponseMsg }
func (p *TalkResponse) RequestID() []byte { return p.ReqID }
func (p *TalkResponse) SetRequestID(id []byte) { p.ReqID = id }
-func (*RequestTicket) Name() string { return "REQTICKET/v5" }
-func (*RequestTicket) Kind() byte { return RequestTicketMsg }
-func (p *RequestTicket) RequestID() []byte { return p.ReqID }
-func (p *RequestTicket) SetRequestID(id []byte) { p.ReqID = id }
-
-func (*Regtopic) Name() string { return "REGTOPIC/v5" }
-func (*Regtopic) Kind() byte { return RegtopicMsg }
-func (p *Regtopic) RequestID() []byte { return p.ReqID }
-func (p *Regtopic) SetRequestID(id []byte) { p.ReqID = id }
-
-func (*Ticket) Name() string { return "TICKET/v5" }
-func (*Ticket) Kind() byte { return TicketMsg }
-func (p *Ticket) RequestID() []byte { return p.ReqID }
-func (p *Ticket) SetRequestID(id []byte) { p.ReqID = id }
-
-func (*Regconfirmation) Name() string { return "REGCONFIRMATION/v5" }
-func (*Regconfirmation) Kind() byte { return RegconfirmationMsg }
-func (p *Regconfirmation) RequestID() []byte { return p.ReqID }
-func (p *Regconfirmation) SetRequestID(id []byte) { p.ReqID = id }
-
-func (*TopicQuery) Name() string { return "TOPICQUERY/v5" }
-func (*TopicQuery) Kind() byte { return TopicQueryMsg }
-func (p *TopicQuery) RequestID() []byte { return p.ReqID }
-func (p *TopicQuery) SetRequestID(id []byte) { p.ReqID = id }
+func (p *TalkResponse) AppendLogInfo(ctx []interface{}) []interface{} {
+ return append(ctx, "req", hexutil.Bytes(p.ReqID), "len", len(p.Message))
+}
diff --git a/discover/v5wire/session.go b/discover/v5wire/session.go
index d52b5c1..862c21f 100644
--- a/discover/v5wire/session.go
+++ b/discover/v5wire/session.go
@@ -22,10 +22,10 @@ import (
"encoding/binary"
"time"
+ "github.com/ethereum/go-ethereum/common/lru"
"github.com/ethereum/go-ethereum/common/mclock"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/p2p/enode"
- "github.com/hashicorp/golang-lru/simplelru"
)
const handshakeTimeout = time.Second
@@ -33,7 +33,7 @@ const handshakeTimeout = time.Second
// The SessionCache keeps negotiated encryption keys and
// state for in-progress handshakes in the Discovery v5 wire protocol.
type SessionCache struct {
- sessions *simplelru.LRU
+ sessions lru.BasicLRU[sessionID, *session]
handshakes map[sessionID]*Whoareyou
clock mclock.Clock
@@ -62,12 +62,8 @@ func (s *session) keysFlipped() *session {
}
func NewSessionCache(maxItems int, clock mclock.Clock) *SessionCache {
- cache, err := simplelru.NewLRU(maxItems, nil)
- if err != nil {
- panic("can't create session cache")
- }
return &SessionCache{
- sessions: cache,
+ sessions: lru.NewBasicLRU[sessionID, *session](maxItems),
handshakes: make(map[sessionID]*Whoareyou),
clock: clock,
nonceGen: generateNonce,
@@ -95,11 +91,8 @@ func (sc *SessionCache) nextNonce(s *session) (Nonce, error) {
// session returns the current session for the given node, if any.
func (sc *SessionCache) session(id enode.ID, addr string) *session {
- item, ok := sc.sessions.Get(sessionID{id, addr})
- if !ok {
- return nil
- }
- return item.(*session)
+ item, _ := sc.sessions.Get(sessionID{id, addr})
+ return item
}
// readKey returns the current read key for the given node.
diff --git a/go.mod b/go.mod
index 62b7080..9d3724d 100644
--- a/go.mod
+++ b/go.mod
@@ -1,10 +1,27 @@
module github.com/waku-org/go-discover
-go 1.15
+go 1.19
require (
github.com/davecgh/go-spew v1.1.1
- github.com/ethereum/go-ethereum v1.10.16
- github.com/hashicorp/golang-lru v0.5.5-0.20210104140557-80c98217689d
- golang.org/x/crypto v0.0.0-20220331220935-ae2d96664a29
+ github.com/ethereum/go-ethereum v1.11.6
+ github.com/stretchr/testify v1.8.0
+ golang.org/x/crypto v0.1.0
+)
+
+require (
+ github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6 // indirect
+ github.com/btcsuite/btcd/btcec/v2 v2.2.0 // indirect
+ github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1 // indirect
+ github.com/go-ole/go-ole v1.2.1 // indirect
+ github.com/go-stack/stack v1.8.1 // indirect
+ github.com/golang/snappy v0.0.5-0.20220116011046-fa5810519dcb // indirect
+ github.com/holiman/uint256 v1.2.2-0.20230321075855-87b91420868c // indirect
+ github.com/pmezard/go-difflib v1.0.0 // indirect
+ github.com/shirou/gopsutil v3.21.4-0.20210419000835-c7a38de76ee5+incompatible // indirect
+ github.com/syndtr/goleveldb v1.0.1-0.20210819022825-2ae1ddf74ef7 // indirect
+ github.com/tklauser/go-sysconf v0.3.5 // indirect
+ github.com/tklauser/numcpus v0.2.2 // indirect
+ golang.org/x/sys v0.6.0 // indirect
+ gopkg.in/yaml.v3 v3.0.1 // indirect
)
diff --git a/go.sum b/go.sum
index 0b3ba13..f63209e 100644
--- a/go.sum
+++ b/go.sum
@@ -1,588 +1,108 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
-cloud.google.com/go v0.43.0/go.mod h1:BOSR3VbTLkk6FDC/TcffxP4NF/FFBGA5ku+jvKOP7pg=
-cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
-cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
-cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
-cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
-cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
-cloud.google.com/go v0.51.0/go.mod h1:hWtGJ6gnXH+KgDv+V0zFGDvpi07n3z8ZNj3T1RW0Gcw=
-cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
-cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
-cloud.google.com/go/bigtable v1.2.0/go.mod h1:JcVAOl45lrTmQfLj7T6TxyMzIN/3FGGcFm+2xVAli2o=
-cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
-cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
-cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
-cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
-cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
-collectd.org v0.3.0/go.mod h1:A/8DzQBkF6abtvrT2j/AU/4tiBgJWYyh0y/oB/4MlWE=
-dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
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-github.com/Azure/azure-pipeline-go v0.2.2/go.mod h1:4rQ/NZncSvGqNkkOsNpOU1tgoNuIlp9AfUH5G1tvCHc=
-github.com/Azure/azure-storage-blob-go v0.7.0/go.mod h1:f9YQKtsG1nMisotuTPpO0tjNuEjKRYAcJU8/ydDI++4=
-github.com/Azure/go-autorest/autorest v0.9.0/go.mod h1:xyHB1BMZT0cuDHU7I0+g046+BFDTQ8rEZB0s4Yfa6bI=
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-github.com/Azure/go-autorest/logger v0.1.0/go.mod h1:oExouG+K6PryycPJfVSxi/koC6LSNgds39diKLz7Vrc=
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-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
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-github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBAUSII=
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-github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
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-github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
-github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
-github.com/bmizerany/pat v0.0.0-20170815010413-6226ea591a40/go.mod h1:8rLXio+WjiTceGBHIoTvn60HIbs7Hm7bcHjyrSqYB9c=
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