forked from cerc-io/plugeth
swarm/pss: forwarding function refactoring (#18353)
This commit is contained in:
parent
e1edfe0689
commit
ca7c13ba8f
356
swarm/pss/forwarding_test.go
Normal file
356
swarm/pss/forwarding_test.go
Normal file
@ -0,0 +1,356 @@
|
||||
package pss
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"math/rand"
|
||||
"testing"
|
||||
"time"
|
||||
|
||||
"github.com/ethereum/go-ethereum/crypto"
|
||||
"github.com/ethereum/go-ethereum/p2p"
|
||||
"github.com/ethereum/go-ethereum/p2p/enode"
|
||||
"github.com/ethereum/go-ethereum/p2p/protocols"
|
||||
"github.com/ethereum/go-ethereum/swarm/network"
|
||||
"github.com/ethereum/go-ethereum/swarm/pot"
|
||||
whisper "github.com/ethereum/go-ethereum/whisper/whisperv5"
|
||||
)
|
||||
|
||||
type testCase struct {
|
||||
name string
|
||||
recipient []byte
|
||||
peers []pot.Address
|
||||
expected []int
|
||||
exclusive bool
|
||||
nFails int
|
||||
success bool
|
||||
errors string
|
||||
}
|
||||
|
||||
var testCases []testCase
|
||||
|
||||
// the purpose of this test is to see that pss.forward() function correctly
|
||||
// selects the peers for message forwarding, depending on the message address
|
||||
// and kademlia constellation.
|
||||
func TestForwardBasic(t *testing.T) {
|
||||
baseAddrBytes := make([]byte, 32)
|
||||
for i := 0; i < len(baseAddrBytes); i++ {
|
||||
baseAddrBytes[i] = 0xFF
|
||||
}
|
||||
var c testCase
|
||||
base := pot.NewAddressFromBytes(baseAddrBytes)
|
||||
var peerAddresses []pot.Address
|
||||
const depth = 10
|
||||
for i := 0; i <= depth; i++ {
|
||||
// add two peers for each proximity order
|
||||
a := pot.RandomAddressAt(base, i)
|
||||
peerAddresses = append(peerAddresses, a)
|
||||
a = pot.RandomAddressAt(base, i)
|
||||
peerAddresses = append(peerAddresses, a)
|
||||
}
|
||||
|
||||
// skip one level, add one peer at one level deeper.
|
||||
// as a result, we will have an edge case of three peers in nearest neighbours' bin.
|
||||
peerAddresses = append(peerAddresses, pot.RandomAddressAt(base, depth+2))
|
||||
|
||||
kad := network.NewKademlia(base[:], network.NewKadParams())
|
||||
ps := createPss(t, kad)
|
||||
addPeers(kad, peerAddresses)
|
||||
|
||||
const firstNearest = depth * 2 // shallowest peer in the nearest neighbours' bin
|
||||
nearestNeighbours := []int{firstNearest, firstNearest + 1, firstNearest + 2}
|
||||
var all []int // indices of all the peers
|
||||
for i := 0; i < len(peerAddresses); i++ {
|
||||
all = append(all, i)
|
||||
}
|
||||
|
||||
for i := 0; i < len(peerAddresses); i++ {
|
||||
// send msg directly to the known peers (recipient address == peer address)
|
||||
c = testCase{
|
||||
name: fmt.Sprintf("Send direct to known, id: [%d]", i),
|
||||
recipient: peerAddresses[i][:],
|
||||
peers: peerAddresses,
|
||||
expected: []int{i},
|
||||
exclusive: false,
|
||||
}
|
||||
testCases = append(testCases, c)
|
||||
}
|
||||
|
||||
for i := 0; i < firstNearest; i++ {
|
||||
// send random messages with proximity orders, corresponding to PO of each bin,
|
||||
// with one peer being closer to the recipient address
|
||||
a := pot.RandomAddressAt(peerAddresses[i], 64)
|
||||
c = testCase{
|
||||
name: fmt.Sprintf("Send random to each PO, id: [%d]", i),
|
||||
recipient: a[:],
|
||||
peers: peerAddresses,
|
||||
expected: []int{i},
|
||||
exclusive: false,
|
||||
}
|
||||
testCases = append(testCases, c)
|
||||
}
|
||||
|
||||
for i := 0; i < firstNearest; i++ {
|
||||
// send random messages with proximity orders, corresponding to PO of each bin,
|
||||
// with random proximity relative to the recipient address
|
||||
po := i / 2
|
||||
a := pot.RandomAddressAt(base, po)
|
||||
c = testCase{
|
||||
name: fmt.Sprintf("Send direct to known, id: [%d]", i),
|
||||
recipient: a[:],
|
||||
peers: peerAddresses,
|
||||
expected: []int{po * 2, po*2 + 1},
|
||||
exclusive: true,
|
||||
}
|
||||
testCases = append(testCases, c)
|
||||
}
|
||||
|
||||
for i := firstNearest; i < len(peerAddresses); i++ {
|
||||
// recipient address falls into the nearest neighbours' bin
|
||||
a := pot.RandomAddressAt(base, i)
|
||||
c = testCase{
|
||||
name: fmt.Sprintf("recipient address falls into the nearest neighbours' bin, id: [%d]", i),
|
||||
recipient: a[:],
|
||||
peers: peerAddresses,
|
||||
expected: nearestNeighbours,
|
||||
exclusive: false,
|
||||
}
|
||||
testCases = append(testCases, c)
|
||||
}
|
||||
|
||||
// send msg with proximity order much deeper than the deepest nearest neighbour
|
||||
a2 := pot.RandomAddressAt(base, 77)
|
||||
c = testCase{
|
||||
name: "proximity order much deeper than the deepest nearest neighbour",
|
||||
recipient: a2[:],
|
||||
peers: peerAddresses,
|
||||
expected: nearestNeighbours,
|
||||
exclusive: false,
|
||||
}
|
||||
testCases = append(testCases, c)
|
||||
|
||||
// test with partial addresses
|
||||
const part = 12
|
||||
|
||||
for i := 0; i < firstNearest; i++ {
|
||||
// send messages with partial address falling into different proximity orders
|
||||
po := i / 2
|
||||
if i%8 != 0 {
|
||||
c = testCase{
|
||||
name: fmt.Sprintf("partial address falling into different proximity orders, id: [%d]", i),
|
||||
recipient: peerAddresses[i][:i],
|
||||
peers: peerAddresses,
|
||||
expected: []int{po * 2, po*2 + 1},
|
||||
exclusive: true,
|
||||
}
|
||||
testCases = append(testCases, c)
|
||||
}
|
||||
c = testCase{
|
||||
name: fmt.Sprintf("extended partial address falling into different proximity orders, id: [%d]", i),
|
||||
recipient: peerAddresses[i][:part],
|
||||
peers: peerAddresses,
|
||||
expected: []int{po * 2, po*2 + 1},
|
||||
exclusive: true,
|
||||
}
|
||||
testCases = append(testCases, c)
|
||||
}
|
||||
|
||||
for i := firstNearest; i < len(peerAddresses); i++ {
|
||||
// partial address falls into the nearest neighbours' bin
|
||||
c = testCase{
|
||||
name: fmt.Sprintf("partial address falls into the nearest neighbours' bin, id: [%d]", i),
|
||||
recipient: peerAddresses[i][:part],
|
||||
peers: peerAddresses,
|
||||
expected: nearestNeighbours,
|
||||
exclusive: false,
|
||||
}
|
||||
testCases = append(testCases, c)
|
||||
}
|
||||
|
||||
// partial address with proximity order deeper than any of the nearest neighbour
|
||||
a3 := pot.RandomAddressAt(base, part)
|
||||
c = testCase{
|
||||
name: "partial address with proximity order deeper than any of the nearest neighbour",
|
||||
recipient: a3[:part],
|
||||
peers: peerAddresses,
|
||||
expected: nearestNeighbours,
|
||||
exclusive: false,
|
||||
}
|
||||
testCases = append(testCases, c)
|
||||
|
||||
// special cases where partial address matches a large group of peers
|
||||
|
||||
// zero bytes of address is given, msg should be delivered to all the peers
|
||||
c = testCase{
|
||||
name: "zero bytes of address is given",
|
||||
recipient: []byte{},
|
||||
peers: peerAddresses,
|
||||
expected: all,
|
||||
exclusive: false,
|
||||
}
|
||||
testCases = append(testCases, c)
|
||||
|
||||
// luminous radius of 8 bits, proximity order 8
|
||||
indexAtPo8 := 16
|
||||
c = testCase{
|
||||
name: "luminous radius of 8 bits",
|
||||
recipient: []byte{0xFF},
|
||||
peers: peerAddresses,
|
||||
expected: all[indexAtPo8:],
|
||||
exclusive: false,
|
||||
}
|
||||
testCases = append(testCases, c)
|
||||
|
||||
// luminous radius of 256 bits, proximity order 8
|
||||
a4 := pot.Address{}
|
||||
a4[0] = 0xFF
|
||||
c = testCase{
|
||||
name: "luminous radius of 256 bits",
|
||||
recipient: a4[:],
|
||||
peers: peerAddresses,
|
||||
expected: []int{indexAtPo8, indexAtPo8 + 1},
|
||||
exclusive: true,
|
||||
}
|
||||
testCases = append(testCases, c)
|
||||
|
||||
// check correct behaviour in case send fails
|
||||
for i := 2; i < firstNearest-3; i += 2 {
|
||||
po := i / 2
|
||||
// send random messages with proximity orders, corresponding to PO of each bin,
|
||||
// with different numbers of failed attempts.
|
||||
// msg should be received by only one of the deeper peers.
|
||||
a := pot.RandomAddressAt(base, po)
|
||||
c = testCase{
|
||||
name: fmt.Sprintf("Send direct to known, id: [%d]", i),
|
||||
recipient: a[:],
|
||||
peers: peerAddresses,
|
||||
expected: all[i+1:],
|
||||
exclusive: true,
|
||||
nFails: rand.Int()%3 + 2,
|
||||
}
|
||||
testCases = append(testCases, c)
|
||||
}
|
||||
|
||||
for _, c := range testCases {
|
||||
testForwardMsg(t, ps, &c)
|
||||
}
|
||||
}
|
||||
|
||||
// this function tests the forwarding of a single message. the recipient address is passed as param,
|
||||
// along with addresses of all peers, and indices of those peers which are expected to receive the message.
|
||||
func testForwardMsg(t *testing.T, ps *Pss, c *testCase) {
|
||||
recipientAddr := c.recipient
|
||||
peers := c.peers
|
||||
expected := c.expected
|
||||
exclusive := c.exclusive
|
||||
nFails := c.nFails
|
||||
tries := 0 // number of previous failed tries
|
||||
|
||||
resultMap := make(map[pot.Address]int)
|
||||
|
||||
defer func() { sendFunc = sendMsg }()
|
||||
sendFunc = func(_ *Pss, sp *network.Peer, _ *PssMsg) bool {
|
||||
if tries < nFails {
|
||||
tries++
|
||||
return false
|
||||
}
|
||||
a := pot.NewAddressFromBytes(sp.Address())
|
||||
resultMap[a]++
|
||||
return true
|
||||
}
|
||||
|
||||
msg := newTestMsg(recipientAddr)
|
||||
ps.forward(msg)
|
||||
|
||||
// check test results
|
||||
var fail bool
|
||||
precision := len(recipientAddr)
|
||||
if precision > 4 {
|
||||
precision = 4
|
||||
}
|
||||
s := fmt.Sprintf("test [%s]\nmsg address: %x..., radius: %d", c.name, recipientAddr[:precision], 8*len(recipientAddr))
|
||||
|
||||
// false negatives (expected message didn't reach peer)
|
||||
if exclusive {
|
||||
var cnt int
|
||||
for _, i := range expected {
|
||||
a := peers[i]
|
||||
cnt += resultMap[a]
|
||||
resultMap[a] = 0
|
||||
}
|
||||
if cnt != 1 {
|
||||
s += fmt.Sprintf("\n%d messages received by %d peers with indices: [%v]", cnt, len(expected), expected)
|
||||
fail = true
|
||||
}
|
||||
} else {
|
||||
for _, i := range expected {
|
||||
a := peers[i]
|
||||
received := resultMap[a]
|
||||
if received != 1 {
|
||||
s += fmt.Sprintf("\npeer number %d [%x...] received %d messages", i, a[:4], received)
|
||||
fail = true
|
||||
}
|
||||
resultMap[a] = 0
|
||||
}
|
||||
}
|
||||
|
||||
// false positives (unexpected message reached peer)
|
||||
for k, v := range resultMap {
|
||||
if v != 0 {
|
||||
// find the index of the false positive peer
|
||||
var j int
|
||||
for j = 0; j < len(peers); j++ {
|
||||
if peers[j] == k {
|
||||
break
|
||||
}
|
||||
}
|
||||
s += fmt.Sprintf("\npeer number %d [%x...] received %d messages", j, k[:4], v)
|
||||
fail = true
|
||||
}
|
||||
}
|
||||
|
||||
if fail {
|
||||
t.Fatal(s)
|
||||
}
|
||||
}
|
||||
|
||||
func addPeers(kad *network.Kademlia, addresses []pot.Address) {
|
||||
for _, a := range addresses {
|
||||
p := newTestDiscoveryPeer(a, kad)
|
||||
kad.On(p)
|
||||
}
|
||||
}
|
||||
|
||||
func createPss(t *testing.T, kad *network.Kademlia) *Pss {
|
||||
privKey, err := crypto.GenerateKey()
|
||||
pssp := NewPssParams().WithPrivateKey(privKey)
|
||||
ps, err := NewPss(kad, pssp)
|
||||
if err != nil {
|
||||
t.Fatal(err.Error())
|
||||
}
|
||||
return ps
|
||||
}
|
||||
|
||||
func newTestDiscoveryPeer(addr pot.Address, kad *network.Kademlia) *network.Peer {
|
||||
rw := &p2p.MsgPipeRW{}
|
||||
p := p2p.NewPeer(enode.ID{}, "test", []p2p.Cap{})
|
||||
pp := protocols.NewPeer(p, rw, &protocols.Spec{})
|
||||
bp := &network.BzzPeer{
|
||||
Peer: pp,
|
||||
BzzAddr: &network.BzzAddr{
|
||||
OAddr: addr.Bytes(),
|
||||
UAddr: []byte(fmt.Sprintf("%x", addr[:])),
|
||||
},
|
||||
}
|
||||
return network.NewPeer(bp, kad)
|
||||
}
|
||||
|
||||
func newTestMsg(addr []byte) *PssMsg {
|
||||
msg := newPssMsg(&msgParams{})
|
||||
msg.To = addr[:]
|
||||
msg.Expire = uint32(time.Now().Add(time.Second * 60).Unix())
|
||||
msg.Payload = &whisper.Envelope{
|
||||
Topic: [4]byte{},
|
||||
Data: []byte("i have nothing to hide"),
|
||||
}
|
||||
return msg
|
||||
}
|
133
swarm/pss/pss.go
133
swarm/pss/pss.go
@ -891,68 +891,97 @@ func (p *Pss) send(to []byte, topic Topic, msg []byte, asymmetric bool, key []by
|
||||
return nil
|
||||
}
|
||||
|
||||
// Forwards a pss message to the peer(s) closest to the to recipient address in the PssMsg struct
|
||||
// The recipient address can be of any length, and the byte slice will be matched to the MSB slice
|
||||
// of the peer address of the equivalent length.
|
||||
// sendFunc is a helper function that tries to send a message and returns true on success.
|
||||
// It is set here for usage in production, and optionally overridden in tests.
|
||||
var sendFunc func(p *Pss, sp *network.Peer, msg *PssMsg) bool = sendMsg
|
||||
|
||||
// tries to send a message, returns true if successful
|
||||
func sendMsg(p *Pss, sp *network.Peer, msg *PssMsg) bool {
|
||||
var isPssEnabled bool
|
||||
info := sp.Info()
|
||||
for _, capability := range info.Caps {
|
||||
if capability == p.capstring {
|
||||
isPssEnabled = true
|
||||
break
|
||||
}
|
||||
}
|
||||
if !isPssEnabled {
|
||||
log.Error("peer doesn't have matching pss capabilities, skipping", "peer", info.Name, "caps", info.Caps)
|
||||
return false
|
||||
}
|
||||
|
||||
// get the protocol peer from the forwarding peer cache
|
||||
p.fwdPoolMu.RLock()
|
||||
pp := p.fwdPool[sp.Info().ID]
|
||||
p.fwdPoolMu.RUnlock()
|
||||
|
||||
err := pp.Send(context.TODO(), msg)
|
||||
if err != nil {
|
||||
metrics.GetOrRegisterCounter("pss.pp.send.error", nil).Inc(1)
|
||||
log.Error(err.Error())
|
||||
}
|
||||
|
||||
return err == nil
|
||||
}
|
||||
|
||||
// Forwards a pss message to the peer(s) based on recipient address according to the algorithm
|
||||
// described below. The recipient address can be of any length, and the byte slice will be matched
|
||||
// to the MSB slice of the peer address of the equivalent length.
|
||||
//
|
||||
// If the recipient address (or partial address) is within the neighbourhood depth of the forwarding
|
||||
// node, then it will be forwarded to all the nearest neighbours of the forwarding node. In case of
|
||||
// partial address, it should be forwarded to all the peers matching the partial address, if there
|
||||
// are any; otherwise only to one peer, closest to the recipient address. In any case, if the message
|
||||
// forwarding fails, the node should try to forward it to the next best peer, until the message is
|
||||
// successfully forwarded to at least one peer.
|
||||
func (p *Pss) forward(msg *PssMsg) error {
|
||||
metrics.GetOrRegisterCounter("pss.forward", nil).Inc(1)
|
||||
|
||||
sent := 0 // number of successful sends
|
||||
to := make([]byte, addressLength)
|
||||
copy(to[:len(msg.To)], msg.To)
|
||||
neighbourhoodDepth := p.Kademlia.NeighbourhoodDepth()
|
||||
|
||||
// send with kademlia
|
||||
// find the closest peer to the recipient and attempt to send
|
||||
sent := 0
|
||||
p.Kademlia.EachConn(to, 256, func(sp *network.Peer, po int, isproxbin bool) bool {
|
||||
info := sp.Info()
|
||||
// luminosity is the opposite of darkness. the more bytes are removed from the address, the higher is darkness,
|
||||
// but the luminosity is less. here luminosity equals the number of bits given in the destination address.
|
||||
luminosityRadius := len(msg.To) * 8
|
||||
|
||||
// check if the peer is running pss
|
||||
var ispss bool
|
||||
for _, cap := range info.Caps {
|
||||
if cap == p.capstring {
|
||||
ispss = true
|
||||
break
|
||||
// proximity order function matching up to neighbourhoodDepth bits (po <= neighbourhoodDepth)
|
||||
pof := pot.DefaultPof(neighbourhoodDepth)
|
||||
|
||||
// soft threshold for msg broadcast
|
||||
broadcastThreshold, _ := pof(to, p.BaseAddr(), 0)
|
||||
if broadcastThreshold > luminosityRadius {
|
||||
broadcastThreshold = luminosityRadius
|
||||
}
|
||||
|
||||
var onlySendOnce bool // indicates if the message should only be sent to one peer with closest address
|
||||
|
||||
// if measured from the recipient address as opposed to the base address (see Kademlia.EachConn
|
||||
// call below), then peers that fall in the same proximity bin as recipient address will appear
|
||||
// [at least] one bit closer, but only if these additional bits are given in the recipient address.
|
||||
if broadcastThreshold < luminosityRadius && broadcastThreshold < neighbourhoodDepth {
|
||||
broadcastThreshold++
|
||||
onlySendOnce = true
|
||||
}
|
||||
|
||||
p.Kademlia.EachConn(to, addressLength*8, func(sp *network.Peer, po int, _ bool) bool {
|
||||
if po < broadcastThreshold && sent > 0 {
|
||||
return false // stop iterating
|
||||
}
|
||||
if sendFunc(p, sp, msg) {
|
||||
sent++
|
||||
if onlySendOnce {
|
||||
return false
|
||||
}
|
||||
if po == addressLength*8 {
|
||||
// stop iterating if successfully sent to the exact recipient (perfect match of full address)
|
||||
return false
|
||||
}
|
||||
}
|
||||
if !ispss {
|
||||
log.Trace("peer doesn't have matching pss capabilities, skipping", "peer", info.Name, "caps", info.Caps)
|
||||
return true
|
||||
}
|
||||
|
||||
// get the protocol peer from the forwarding peer cache
|
||||
sendMsg := fmt.Sprintf("MSG TO %x FROM %x VIA %x", to, p.BaseAddr(), sp.Address())
|
||||
p.fwdPoolMu.RLock()
|
||||
pp := p.fwdPool[sp.Info().ID]
|
||||
p.fwdPoolMu.RUnlock()
|
||||
|
||||
// attempt to send the message
|
||||
err := pp.Send(context.TODO(), msg)
|
||||
if err != nil {
|
||||
metrics.GetOrRegisterCounter("pss.pp.send.error", nil).Inc(1)
|
||||
log.Error(err.Error())
|
||||
return true
|
||||
}
|
||||
sent++
|
||||
log.Trace(fmt.Sprintf("%v: successfully forwarded", sendMsg))
|
||||
|
||||
// continue forwarding if:
|
||||
// - if the peer is end recipient but the full address has not been disclosed
|
||||
// - if the peer address matches the partial address fully
|
||||
// - if the peer is in proxbin
|
||||
if len(msg.To) < addressLength && bytes.Equal(msg.To, sp.Address()[:len(msg.To)]) {
|
||||
log.Trace(fmt.Sprintf("Pss keep forwarding: Partial address + full partial match"))
|
||||
return true
|
||||
} else if isproxbin {
|
||||
log.Trace(fmt.Sprintf("%x is in proxbin, keep forwarding", common.ToHex(sp.Address())))
|
||||
return true
|
||||
}
|
||||
// at this point we stop forwarding, and the state is as follows:
|
||||
// - the peer is end recipient and we have full address
|
||||
// - we are not in proxbin (directed routing)
|
||||
// - partial addresses don't fully match
|
||||
return false
|
||||
return true
|
||||
})
|
||||
|
||||
// if we failed to send to anyone, re-insert message in the send-queue
|
||||
if sent == 0 {
|
||||
log.Debug("unable to forward to any peers")
|
||||
if err := p.enqueue(msg); err != nil {
|
||||
|
Loading…
Reference in New Issue
Block a user