358 lines
9.8 KiB
Go
358 lines
9.8 KiB
Go
package pss
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import (
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"fmt"
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"math/rand"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/p2p/enode"
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"github.com/ethereum/go-ethereum/p2p/protocols"
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"github.com/ethereum/go-ethereum/swarm/network"
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"github.com/ethereum/go-ethereum/swarm/pot"
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whisper "github.com/ethereum/go-ethereum/whisper/whisperv6"
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)
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type testCase struct {
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name string
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recipient []byte
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peers []pot.Address
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expected []int
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exclusive bool
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nFails int
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success bool
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errors string
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}
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var testCases []testCase
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// the purpose of this test is to see that pss.forward() function correctly
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// selects the peers for message forwarding, depending on the message address
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// and kademlia constellation.
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func TestForwardBasic(t *testing.T) {
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baseAddrBytes := make([]byte, 32)
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for i := 0; i < len(baseAddrBytes); i++ {
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baseAddrBytes[i] = 0xFF
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}
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var c testCase
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base := pot.NewAddressFromBytes(baseAddrBytes)
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var peerAddresses []pot.Address
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const depth = 10
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for i := 0; i <= depth; i++ {
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// add two peers for each proximity order
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a := pot.RandomAddressAt(base, i)
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peerAddresses = append(peerAddresses, a)
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a = pot.RandomAddressAt(base, i)
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peerAddresses = append(peerAddresses, a)
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}
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// skip one level, add one peer at one level deeper.
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// as a result, we will have an edge case of three peers in nearest neighbours' bin.
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peerAddresses = append(peerAddresses, pot.RandomAddressAt(base, depth+2))
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kad := network.NewKademlia(base[:], network.NewKadParams())
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ps := createPss(t, kad)
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defer ps.Stop()
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addPeers(kad, peerAddresses)
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const firstNearest = depth * 2 // shallowest peer in the nearest neighbours' bin
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nearestNeighbours := []int{firstNearest, firstNearest + 1, firstNearest + 2}
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var all []int // indices of all the peers
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for i := 0; i < len(peerAddresses); i++ {
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all = append(all, i)
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}
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for i := 0; i < len(peerAddresses); i++ {
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// send msg directly to the known peers (recipient address == peer address)
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c = testCase{
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name: fmt.Sprintf("Send direct to known, id: [%d]", i),
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recipient: peerAddresses[i][:],
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peers: peerAddresses,
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expected: []int{i},
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exclusive: false,
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}
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testCases = append(testCases, c)
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}
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for i := 0; i < firstNearest; i++ {
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// send random messages with proximity orders, corresponding to PO of each bin,
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// with one peer being closer to the recipient address
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a := pot.RandomAddressAt(peerAddresses[i], 64)
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c = testCase{
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name: fmt.Sprintf("Send random to each PO, id: [%d]", i),
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recipient: a[:],
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peers: peerAddresses,
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expected: []int{i},
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exclusive: false,
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}
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testCases = append(testCases, c)
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}
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for i := 0; i < firstNearest; i++ {
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// send random messages with proximity orders, corresponding to PO of each bin,
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// with random proximity relative to the recipient address
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po := i / 2
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a := pot.RandomAddressAt(base, po)
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c = testCase{
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name: fmt.Sprintf("Send direct to known, id: [%d]", i),
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recipient: a[:],
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peers: peerAddresses,
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expected: []int{po * 2, po*2 + 1},
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exclusive: true,
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}
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testCases = append(testCases, c)
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}
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for i := firstNearest; i < len(peerAddresses); i++ {
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// recipient address falls into the nearest neighbours' bin
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a := pot.RandomAddressAt(base, i)
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c = testCase{
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name: fmt.Sprintf("recipient address falls into the nearest neighbours' bin, id: [%d]", i),
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recipient: a[:],
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peers: peerAddresses,
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expected: nearestNeighbours,
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exclusive: false,
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}
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testCases = append(testCases, c)
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}
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// send msg with proximity order much deeper than the deepest nearest neighbour
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a2 := pot.RandomAddressAt(base, 77)
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c = testCase{
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name: "proximity order much deeper than the deepest nearest neighbour",
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recipient: a2[:],
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peers: peerAddresses,
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expected: nearestNeighbours,
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exclusive: false,
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}
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testCases = append(testCases, c)
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// test with partial addresses
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const part = 12
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for i := 0; i < firstNearest; i++ {
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// send messages with partial address falling into different proximity orders
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po := i / 2
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if i%8 != 0 {
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c = testCase{
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name: fmt.Sprintf("partial address falling into different proximity orders, id: [%d]", i),
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recipient: peerAddresses[i][:i],
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peers: peerAddresses,
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expected: []int{po * 2, po*2 + 1},
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exclusive: true,
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}
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testCases = append(testCases, c)
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}
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c = testCase{
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name: fmt.Sprintf("extended partial address falling into different proximity orders, id: [%d]", i),
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recipient: peerAddresses[i][:part],
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peers: peerAddresses,
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expected: []int{po * 2, po*2 + 1},
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exclusive: true,
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}
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testCases = append(testCases, c)
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}
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for i := firstNearest; i < len(peerAddresses); i++ {
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// partial address falls into the nearest neighbours' bin
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c = testCase{
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name: fmt.Sprintf("partial address falls into the nearest neighbours' bin, id: [%d]", i),
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recipient: peerAddresses[i][:part],
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peers: peerAddresses,
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expected: nearestNeighbours,
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exclusive: false,
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}
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testCases = append(testCases, c)
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}
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// partial address with proximity order deeper than any of the nearest neighbour
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a3 := pot.RandomAddressAt(base, part)
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c = testCase{
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name: "partial address with proximity order deeper than any of the nearest neighbour",
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recipient: a3[:part],
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peers: peerAddresses,
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expected: nearestNeighbours,
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exclusive: false,
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}
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testCases = append(testCases, c)
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// special cases where partial address matches a large group of peers
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// zero bytes of address is given, msg should be delivered to all the peers
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c = testCase{
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name: "zero bytes of address is given",
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recipient: []byte{},
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peers: peerAddresses,
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expected: all,
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exclusive: false,
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}
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testCases = append(testCases, c)
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// luminous radius of 8 bits, proximity order 8
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indexAtPo8 := 16
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c = testCase{
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name: "luminous radius of 8 bits",
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recipient: []byte{0xFF},
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peers: peerAddresses,
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expected: all[indexAtPo8:],
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exclusive: false,
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}
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testCases = append(testCases, c)
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// luminous radius of 256 bits, proximity order 8
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a4 := pot.Address{}
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a4[0] = 0xFF
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c = testCase{
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name: "luminous radius of 256 bits",
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recipient: a4[:],
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peers: peerAddresses,
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expected: []int{indexAtPo8, indexAtPo8 + 1},
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exclusive: true,
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}
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testCases = append(testCases, c)
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// check correct behaviour in case send fails
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for i := 2; i < firstNearest-3; i += 2 {
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po := i / 2
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// send random messages with proximity orders, corresponding to PO of each bin,
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// with different numbers of failed attempts.
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// msg should be received by only one of the deeper peers.
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a := pot.RandomAddressAt(base, po)
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c = testCase{
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name: fmt.Sprintf("Send direct to known, id: [%d]", i),
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recipient: a[:],
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peers: peerAddresses,
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expected: all[i+1:],
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exclusive: true,
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nFails: rand.Int()%3 + 2,
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}
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testCases = append(testCases, c)
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}
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for _, c := range testCases {
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testForwardMsg(t, ps, &c)
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}
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}
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// this function tests the forwarding of a single message. the recipient address is passed as param,
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// along with addresses of all peers, and indices of those peers which are expected to receive the message.
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func testForwardMsg(t *testing.T, ps *Pss, c *testCase) {
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recipientAddr := c.recipient
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peers := c.peers
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expected := c.expected
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exclusive := c.exclusive
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nFails := c.nFails
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tries := 0 // number of previous failed tries
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resultMap := make(map[pot.Address]int)
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defer func() { sendFunc = sendMsg }()
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sendFunc = func(_ *Pss, sp *network.Peer, _ *PssMsg) bool {
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if tries < nFails {
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tries++
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return false
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}
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a := pot.NewAddressFromBytes(sp.Address())
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resultMap[a]++
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return true
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}
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msg := newTestMsg(recipientAddr)
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ps.forward(msg)
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// check test results
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var fail bool
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precision := len(recipientAddr)
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if precision > 4 {
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precision = 4
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}
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s := fmt.Sprintf("test [%s]\nmsg address: %x..., radius: %d", c.name, recipientAddr[:precision], 8*len(recipientAddr))
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// false negatives (expected message didn't reach peer)
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if exclusive {
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var cnt int
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for _, i := range expected {
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a := peers[i]
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cnt += resultMap[a]
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resultMap[a] = 0
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}
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if cnt != 1 {
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s += fmt.Sprintf("\n%d messages received by %d peers with indices: [%v]", cnt, len(expected), expected)
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fail = true
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}
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} else {
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for _, i := range expected {
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a := peers[i]
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received := resultMap[a]
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if received != 1 {
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s += fmt.Sprintf("\npeer number %d [%x...] received %d messages", i, a[:4], received)
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fail = true
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}
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resultMap[a] = 0
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}
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}
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// false positives (unexpected message reached peer)
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for k, v := range resultMap {
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if v != 0 {
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// find the index of the false positive peer
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var j int
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for j = 0; j < len(peers); j++ {
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if peers[j] == k {
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break
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}
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}
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s += fmt.Sprintf("\npeer number %d [%x...] received %d messages", j, k[:4], v)
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fail = true
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}
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}
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if fail {
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t.Fatal(s)
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}
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}
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func addPeers(kad *network.Kademlia, addresses []pot.Address) {
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for _, a := range addresses {
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p := newTestDiscoveryPeer(a, kad)
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kad.On(p)
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}
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}
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func createPss(t *testing.T, kad *network.Kademlia) *Pss {
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privKey, err := crypto.GenerateKey()
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pssp := NewPssParams().WithPrivateKey(privKey)
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ps, err := NewPss(kad, pssp)
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if err != nil {
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t.Fatal(err.Error())
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}
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return ps
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}
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func newTestDiscoveryPeer(addr pot.Address, kad *network.Kademlia) *network.Peer {
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rw := &p2p.MsgPipeRW{}
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p := p2p.NewPeer(enode.ID{}, "test", []p2p.Cap{})
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pp := protocols.NewPeer(p, rw, &protocols.Spec{})
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bp := &network.BzzPeer{
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Peer: pp,
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BzzAddr: &network.BzzAddr{
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OAddr: addr.Bytes(),
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UAddr: []byte(fmt.Sprintf("%x", addr[:])),
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},
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}
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return network.NewPeer(bp, kad)
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}
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func newTestMsg(addr []byte) *PssMsg {
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msg := newPssMsg(&msgParams{})
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msg.To = addr[:]
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msg.Expire = uint32(time.Now().Add(time.Second * 60).Unix())
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msg.Payload = &whisper.Envelope{
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Topic: [4]byte{},
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Data: []byte("i have nothing to hide"),
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}
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return msg
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}
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