Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

p2p/discover/v4wire: use optional RLP field for EIP-868 seq (#3124) #3963

Merged
merged 1 commit into from
Apr 26, 2022
Merged

p2p/discover/v4wire: use optional RLP field for EIP-868 seq (#3124) #3963

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
10 changes: 3 additions & 7 deletions p2p/discover/v4_udp.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -33,7 +33,6 @@ import (
"github.com/ledgerwatch/erigon/p2p/discover/v4wire"
"github.com/ledgerwatch/erigon/p2p/enode"
"github.com/ledgerwatch/erigon/p2p/netutil"
"github.com/ledgerwatch/erigon/rlp"
"github.com/ledgerwatch/log/v3"
)

Expand Down Expand Up @@ -217,7 +216,7 @@ func (t *UDPv4) Ping(n *enode.Node) error {
func (t *UDPv4) ping(n *enode.Node) (seq uint64, err error) {
rm := t.sendPing(n.ID(), &net.UDPAddr{IP: n.IP(), Port: n.UDP()}, nil)
if err = <-rm.errc; err == nil {
seq = rm.reply.(*v4wire.Pong).ENRSeq()
seq = rm.reply.(*v4wire.Pong).ENRSeq
}
return seq, err
}
Expand Down Expand Up @@ -248,13 +247,12 @@ func (t *UDPv4) sendPing(toid enode.ID, toaddr *net.UDPAddr, callback func()) *r
}

func (t *UDPv4) makePing(toaddr *net.UDPAddr) *v4wire.Ping {
seq, _ := rlp.EncodeToBytes(t.localNode.Node().Seq())
return &v4wire.Ping{
Version: 4,
From: t.ourEndpoint(),
To: v4wire.NewEndpoint(toaddr, 0),
Expiration: uint64(time.Now().Add(expiration).Unix()),
Rest: []rlp.RawValue{seq},
ENRSeq: t.localNode.Node().Seq(),
}
}

Expand Down Expand Up @@ -684,14 +682,12 @@ func (t *UDPv4) handlePing(h *packetHandlerV4, from *net.UDPAddr, fromID enode.I
req := h.Packet.(*v4wire.Ping)

// Reply.
seq, _ := rlp.EncodeToBytes(t.localNode.Node().Seq())

//nolint:errcheck
t.send(from, fromID, &v4wire.Pong{
To: v4wire.NewEndpoint(from, req.From.TCP),
ReplyTok: mac,
Expiration: uint64(time.Now().Add(expiration).Unix()),
Rest: []rlp.RawValue{seq},
ENRSeq: t.localNode.Node().Seq(),
})

// Ping back if our last pong on file is too far in the past.
Expand Down
8 changes: 4 additions & 4 deletions p2p/discover/v4_udp_test.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -487,13 +487,13 @@ func TestUDPv4_EIP868(t *testing.T) {
// Perform endpoint proof and check for sequence number in packet tail.
test.packetIn(nil, &v4wire.Ping{Expiration: futureExp})
test.waitPacketOut(func(p *v4wire.Pong, addr *net.UDPAddr, hash []byte) {
if p.ENRSeq() != wantNode.Seq() {
t.Errorf("wrong sequence number in pong: %d, want %d", p.ENRSeq(), wantNode.Seq())
if p.ENRSeq != wantNode.Seq() {
t.Errorf("wrong sequence number in pong: %d, want %d", p.ENRSeq, wantNode.Seq())
}
})
test.waitPacketOut(func(p *v4wire.Ping, addr *net.UDPAddr, hash []byte) {
if p.ENRSeq() != wantNode.Seq() {
t.Errorf("wrong sequence number in ping: %d, want %d", p.ENRSeq(), wantNode.Seq())
if p.ENRSeq != wantNode.Seq() {
t.Errorf("wrong sequence number in ping: %d, want %d", p.ENRSeq, wantNode.Seq())
}
test.packetIn(nil, &v4wire.Pong{Expiration: futureExp, ReplyTok: hash})
})
Expand Down
24 changes: 8 additions & 16 deletions p2p/discover/v4wire/v4wire.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -49,6 +49,8 @@ type (
Version uint
From, To Endpoint
Expiration uint64
ENRSeq uint64 `rlp:"optional"` // Sequence number of local record, added by EIP-868.

// Ignore additional fields (for forward compatibility).
Rest []rlp.RawValue `rlp:"tail"`
}
Expand All @@ -61,6 +63,8 @@ type (
To Endpoint
ReplyTok []byte // This contains the hash of the ping packet.
Expiration uint64 // Absolute timestamp at which the packet becomes invalid.
ENRSeq uint64 `rlp:"optional"` // Sequence number of local record, added by EIP-868.

// Ignore additional fields (for forward compatibility).
Rest []rlp.RawValue `rlp:"tail"`
}
Expand Down Expand Up @@ -156,13 +160,11 @@ type Packet interface {
Kind() byte
}

func (req *Ping) Name() string { return "PING/v4" }
func (req *Ping) Kind() byte { return PingPacket }
func (req *Ping) ENRSeq() uint64 { return seqFromTail(req.Rest) }
func (req *Ping) Name() string { return "PING/v4" }
func (req *Ping) Kind() byte { return PingPacket }

func (req *Pong) Name() string { return "PONG/v4" }
func (req *Pong) Kind() byte { return PongPacket }
func (req *Pong) ENRSeq() uint64 { return seqFromTail(req.Rest) }
func (req *Pong) Name() string { return "PONG/v4" }
func (req *Pong) Kind() byte { return PongPacket }

func (req *Findnode) Name() string { return "FINDNODE/v4" }
func (req *Findnode) Kind() byte { return FindnodePacket }
Expand All @@ -181,16 +183,6 @@ func Expired(ts uint64) bool {
return time.Unix(int64(ts), 0).Before(time.Now())
}

func seqFromTail(tail []rlp.RawValue) uint64 {
if len(tail) == 0 {
return 0
}
var seq uint64
//goland:noinspection GoUnhandledErrorResult
rlp.DecodeBytes(tail[0], &seq) //nolint:errcheck
return seq
}

// Encoder/decoder.

const (
Expand Down
24 changes: 2 additions & 22 deletions p2p/discover/v4wire/v4wire_test.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -23,7 +23,6 @@ import (
"testing"

"github.com/davecgh/go-spew/spew"
"github.com/ledgerwatch/erigon/common"
"github.com/ledgerwatch/erigon/crypto"
"github.com/ledgerwatch/erigon/rlp"
)
Expand All @@ -40,7 +39,6 @@ var testPackets = []struct {
From: Endpoint{net.ParseIP("127.0.0.1").To4(), 3322, 5544},
To: Endpoint{net.ParseIP("::1"), 2222, 3333},
Expiration: 1136239445,
Rest: []rlp.RawValue{},
},
},
{
Expand All @@ -50,26 +48,8 @@ var testPackets = []struct {
From: Endpoint{net.ParseIP("127.0.0.1").To4(), 3322, 5544},
To: Endpoint{net.ParseIP("::1"), 2222, 3333},
Expiration: 1136239445,
Rest: []rlp.RawValue{{0x01}, {0x02}},
},
},
{
input: "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",
wantPacket: &Ping{
Version: 555,
From: Endpoint{net.ParseIP("2001:db8:3c4d:15::abcd:ef12"), 3322, 5544},
To: Endpoint{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: Endpoint{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}},
ENRSeq: 1,
Rest: []rlp.RawValue{{0x02}},
},
},
{
Expand Down