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cmd/devp2p: fix ping/pong race in discv4 tests (#23306)

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This PR modifies the post-PING-send expectations to both be laxer and stricter: it doesn't care what order the packets arrive, but also verifies that exactly one PING and one PONG is returned.
This commit is contained in:
Martin Holst Swende 2021-08-03 11:21:39 +02:00 committed by GitHub
parent 82c5085399
commit 4cd6a1458e
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 41 additions and 16 deletions
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57
cmd/devp2p/internal/v4test/discv4tests.go
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@ -79,14 +79,44 @@ func BasicPing(t *utesting.T) {
To: te.remoteEndpoint(),
Expiration: futureExpiration(),
})
reply, _, _ := te.read(te.l1)
if err := te.checkPong(reply, pingHash); err != nil {
if err := te.checkPingPong(pingHash); err != nil {
t.Fatal(err)
}
}
// checkPong verifies that reply is a valid PONG matching the given ping hash.
// checkPingPong verifies that the remote side sends both a PONG with the
// correct hash, and a PING.
// The two packets do not have to be in any particular order.
func (te *testenv) checkPingPong(pingHash []byte) error {
var (
pings int
pongs int
)
for i := 0; i < 2; i++ {
reply, _, err := te.read(te.l1)
if err != nil {
return err
}
switch reply.Kind() {
case v4wire.PongPacket:
if err := te.checkPong(reply, pingHash); err != nil {
return err
}
pongs++
case v4wire.PingPacket:
pings++
default:
return fmt.Errorf("expected PING or PONG, got %v %v", reply.Name(), reply)
}
}
if pongs == 1 && pings == 1 {
return nil
}
return fmt.Errorf("expected 1 PING (got %d) and 1 PONG (got %d)", pings, pongs)
}
// checkPong verifies that reply is a valid PONG matching the given ping hash,
// and a PING. The two packets do not have to be in any particular order.
func (te *testenv) checkPong(reply v4wire.Packet, pingHash []byte) error {
if reply == nil {
return fmt.Errorf("expected PONG reply, got nil")
@ -119,9 +149,7 @@ func PingWrongTo(t *utesting.T) {
To: wrongEndpoint,
Expiration: futureExpiration(),
})
reply, _, _ := te.read(te.l1)
if err := te.checkPong(reply, pingHash); err != nil {
if err := te.checkPingPong(pingHash); err != nil {
t.Fatal(err)
}
}
@ -139,8 +167,7 @@ func PingWrongFrom(t *utesting.T) {
Expiration: futureExpiration(),
})
reply, _, _ := te.read(te.l1)
if err := te.checkPong(reply, pingHash); err != nil {
if err := te.checkPingPong(pingHash); err != nil {
t.Fatal(err)
}
}
@ -161,8 +188,7 @@ func PingExtraData(t *utesting.T) {
JunkData2: []byte{9, 8, 7, 6, 5, 4, 3, 2, 1},
})
reply, _, _ := te.read(te.l1)
if err := te.checkPong(reply, pingHash); err != nil {
if err := te.checkPingPong(pingHash); err != nil {
t.Fatal(err)
}
}
@ -183,8 +209,7 @@ func PingExtraDataWrongFrom(t *utesting.T) {
JunkData2: []byte{9, 8, 7, 6, 5, 4, 3, 2, 1},
}
pingHash := te.send(te.l1, &req)
reply, _, _ := te.read(te.l1)
if err := te.checkPong(reply, pingHash); err != nil {
if err := te.checkPingPong(pingHash); err != nil {
t.Fatal(err)
}
}
@ -240,9 +265,9 @@ func BondThenPingWithWrongFrom(t *utesting.T) {
To: te.remoteEndpoint(),
Expiration: futureExpiration(),
})
reply, _, _ := te.read(te.l1)
if err := te.checkPong(reply, pingHash); err != nil {
if reply, _, err := te.read(te.l1); err != nil {
t.Fatal(err)
} else if err := te.checkPong(reply, pingHash); err != nil {
t.Fatal(err)
}
}