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package quic
import (
"testing"
"github.com/quic-go/quic-go/internal/protocol"
"github.com/quic-go/quic-go/internal/wire"
"github.com/stretchr/testify/require"
)
func TestRetransmissionQueueFrames(t *testing.T) {
t.Run("Initial", func(t *testing.T) {
testRetransmissionQueueFrames(t, protocol.EncryptionInitial)
})
t.Run("Handshake", func(t *testing.T) {
testRetransmissionQueueFrames(t, protocol.EncryptionHandshake)
})
t.Run("1-RTT", func(t *testing.T) {
testRetransmissionQueueFrames(t, protocol.Encryption1RTT)
})
}
func testRetransmissionQueueFrames(t *testing.T, encLevel protocol.EncryptionLevel) {
q := newRetransmissionQueue()
require.False(t, q.HasData(encLevel))
require.Nil(t, q.GetFrame(encLevel, protocol.MaxByteCount, protocol.Version1))
ah := q.AckHandler(encLevel)
require.NotNil(t, ah)
ah.OnLost(&wire.PingFrame{})
require.True(t, q.HasData(encLevel))
require.Equal(t, &wire.PingFrame{}, q.GetFrame(encLevel, protocol.MaxByteCount, protocol.Version1))
require.False(t, q.HasData(encLevel))
require.Nil(t, q.GetFrame(encLevel, protocol.MaxByteCount, protocol.Version1))
f := &wire.PathChallengeFrame{Data: [8]byte{1, 2, 3, 4, 5, 6, 7, 8}}
ah.OnLost(f)
require.True(t, q.HasData(encLevel))
require.Nil(t, q.GetFrame(encLevel, f.Length(protocol.Version1)-1, protocol.Version1))
require.Equal(t, f, q.GetFrame(encLevel, f.Length(protocol.Version1), protocol.Version1))
require.False(t, q.HasData(encLevel))
if encLevel == protocol.Encryption1RTT {
require.Panics(t, func() { ah.OnLost(&wire.StreamFrame{}) })
}
}
func TestRetransmissionQueueCryptoFrames(t *testing.T) {
t.Run("Initial", func(t *testing.T) {
testRetransmissionQueueCryptoFrames(t, protocol.EncryptionInitial)
})
t.Run("Handshake", func(t *testing.T) {
testRetransmissionQueueCryptoFrames(t, protocol.EncryptionHandshake)
})
t.Run("1-RTT", func(t *testing.T) {
testRetransmissionQueueCryptoFrames(t, protocol.Encryption1RTT)
})
}
func testRetransmissionQueueCryptoFrames(t *testing.T, encLevel protocol.EncryptionLevel) {
q := newRetransmissionQueue()
var otherEncLevel protocol.EncryptionLevel
switch encLevel {
case protocol.EncryptionInitial:
otherEncLevel = protocol.EncryptionHandshake
case protocol.EncryptionHandshake:
otherEncLevel = protocol.Encryption1RTT
case protocol.Encryption1RTT:
otherEncLevel = protocol.EncryptionInitial
}
ah := q.AckHandler(encLevel)
require.NotNil(t, ah)
ah.OnLost(&wire.CryptoFrame{Data: []byte("foobar")})
require.True(t, q.HasData(encLevel))
require.False(t, q.HasData(otherEncLevel))
require.Equal(t, &wire.CryptoFrame{Data: []byte("foobar")}, q.GetFrame(encLevel, protocol.MaxByteCount, protocol.Version1))
require.False(t, q.HasData(encLevel))
require.Nil(t, q.GetFrame(encLevel, protocol.MaxByteCount, protocol.Version1))
f := &wire.CryptoFrame{Offset: 100, Data: []byte("foobar")}
ah.OnLost(f)
ah.OnLost(&wire.PingFrame{})
require.True(t, q.HasData(encLevel))
require.False(t, q.HasData(otherEncLevel))
// the CRYPTO frame wouldn't fit, not even if it was split
require.IsType(t, &wire.PingFrame{}, q.GetFrame(encLevel, 2, protocol.Version1))
f1 := q.GetFrame(encLevel, f.Length(protocol.Version1)-3, protocol.Version1)
require.NotNil(t, f1)
require.IsType(t, &wire.CryptoFrame{}, f1)
require.Equal(t, &wire.CryptoFrame{Offset: 100, Data: []byte("foo")}, f1)
f2 := q.GetFrame(encLevel, protocol.MaxByteCount, protocol.Version1)
require.NotNil(t, f2)
require.IsType(t, &wire.CryptoFrame{}, f2)
require.Equal(t, &wire.CryptoFrame{Offset: 103, Data: []byte("bar")}, f2)
}
func TestRetransmissionQueueDropEncLevel(t *testing.T) {
q := newRetransmissionQueue()
require.Panics(t, func() { q.DropPackets(protocol.Encryption0RTT) })
require.Panics(t, func() { q.DropPackets(protocol.Encryption1RTT) })
t.Run("Initial", func(t *testing.T) {
testRetransmissionQueueDropEncLevel(t, protocol.EncryptionInitial)
})
t.Run("Handshake", func(t *testing.T) {
testRetransmissionQueueDropEncLevel(t, protocol.EncryptionHandshake)
})
}
func testRetransmissionQueueDropEncLevel(t *testing.T, encLevel protocol.EncryptionLevel) {
q := newRetransmissionQueue()
ah := q.AckHandler(encLevel)
require.NotNil(t, ah)
ah.OnLost(&wire.PingFrame{})
ah.OnLost(&wire.CryptoFrame{Data: []byte("foobar")})
require.True(t, q.HasData(encLevel))
q.DropPackets(encLevel)
require.False(t, q.HasData(encLevel))
require.Nil(t, q.GetFrame(encLevel, protocol.MaxByteCount, protocol.Version1))
// losing more frame is a no-op
ah.OnLost(&wire.CryptoFrame{Data: []byte("foobar")})
ah.OnLost(&wire.PingFrame{})
require.False(t, q.HasData(encLevel))
}
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