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package wire
import (
"io"
"math"
"testing"
"time"
"github.com/quic-go/quic-go/internal/protocol"
"github.com/quic-go/quic-go/quicvarint"
"github.com/stretchr/testify/require"
)
func TestParseACKWithoutRanges(t *testing.T) {
data := encodeVarInt(100) // largest acked
data = append(data, encodeVarInt(0)...) // delay
data = append(data, encodeVarInt(0)...) // num blocks
data = append(data, encodeVarInt(10)...) // first ack block
var frame AckFrame
n, err := parseAckFrame(&frame, data, FrameTypeAck, protocol.AckDelayExponent, protocol.Version1)
require.NoError(t, err)
require.Equal(t, len(data), n)
require.Equal(t, protocol.PacketNumber(100), frame.LargestAcked())
require.Equal(t, protocol.PacketNumber(90), frame.LowestAcked())
require.False(t, frame.HasMissingRanges())
}
func TestParseACKSinglePacket(t *testing.T) {
data := encodeVarInt(55) // largest acked
data = append(data, encodeVarInt(0)...) // delay
data = append(data, encodeVarInt(0)...) // num blocks
data = append(data, encodeVarInt(0)...) // first ack block
var frame AckFrame
n, err := parseAckFrame(&frame, data, FrameTypeAck, protocol.AckDelayExponent, protocol.Version1)
require.NoError(t, err)
require.Equal(t, len(data), n)
require.Equal(t, protocol.PacketNumber(55), frame.LargestAcked())
require.Equal(t, protocol.PacketNumber(55), frame.LowestAcked())
require.False(t, frame.HasMissingRanges())
}
func TestParseACKAllPacketsFrom0ToLargest(t *testing.T) {
data := encodeVarInt(20) // largest acked
data = append(data, encodeVarInt(0)...) // delay
data = append(data, encodeVarInt(0)...) // num blocks
data = append(data, encodeVarInt(20)...) // first ack block
var frame AckFrame
n, err := parseAckFrame(&frame, data, FrameTypeAck, protocol.AckDelayExponent, protocol.Version1)
require.NoError(t, err)
require.Equal(t, len(data), n)
require.Equal(t, protocol.PacketNumber(20), frame.LargestAcked())
require.Equal(t, protocol.PacketNumber(0), frame.LowestAcked())
require.False(t, frame.HasMissingRanges())
}
func TestParseACKRejectFirstBlockLargerThanLargestAcked(t *testing.T) {
data := encodeVarInt(20) // largest acked
data = append(data, encodeVarInt(0)...) // delay
data = append(data, encodeVarInt(0)...) // num blocks
data = append(data, encodeVarInt(21)...) // first ack block
var frame AckFrame
_, err := parseAckFrame(&frame, data, FrameTypeAck, protocol.AckDelayExponent, protocol.Version1)
require.EqualError(t, err, "invalid first ACK range")
}
func TestParseACKWithSingleBlock(t *testing.T) {
data := encodeVarInt(1000) // largest acked
data = append(data, encodeVarInt(0)...) // delay
data = append(data, encodeVarInt(1)...) // num blocks
data = append(data, encodeVarInt(100)...) // first ack block
data = append(data, encodeVarInt(98)...) // gap
data = append(data, encodeVarInt(50)...) // ack block
var frame AckFrame
n, err := parseAckFrame(&frame, data, FrameTypeAck, protocol.AckDelayExponent, protocol.Version1)
require.NoError(t, err)
require.Equal(t, len(data), n)
require.Equal(t, protocol.PacketNumber(1000), frame.LargestAcked())
require.Equal(t, protocol.PacketNumber(750), frame.LowestAcked())
require.True(t, frame.HasMissingRanges())
require.Equal(t, []AckRange{
{Largest: 1000, Smallest: 900},
{Largest: 800, Smallest: 750},
}, frame.AckRanges)
}
func TestParseACKWithMultipleBlocks(t *testing.T) {
data := encodeVarInt(100) // largest acked
data = append(data, encodeVarInt(0)...) // delay
data = append(data, encodeVarInt(2)...) // num blocks
data = append(data, encodeVarInt(0)...) // first ack block
data = append(data, encodeVarInt(0)...) // gap
data = append(data, encodeVarInt(0)...) // ack block
data = append(data, encodeVarInt(1)...) // gap
data = append(data, encodeVarInt(1)...) // ack block
var frame AckFrame
n, err := parseAckFrame(&frame, data, FrameTypeAck, protocol.AckDelayExponent, protocol.Version1)
require.NoError(t, err)
require.Equal(t, len(data), n)
require.Equal(t, protocol.PacketNumber(100), frame.LargestAcked())
require.Equal(t, protocol.PacketNumber(94), frame.LowestAcked())
require.True(t, frame.HasMissingRanges())
require.Equal(t, []AckRange{
{Largest: 100, Smallest: 100},
{Largest: 98, Smallest: 98},
{Largest: 95, Smallest: 94},
}, frame.AckRanges)
}
func TestParseACKUseAckDelayExponent(t *testing.T) {
const delayTime = 1 << 10 * time.Millisecond
f := &AckFrame{
AckRanges: []AckRange{{Smallest: 1, Largest: 1}},
DelayTime: delayTime,
}
b, err := f.Append(nil, protocol.Version1)
require.NoError(t, err)
for i := uint8(0); i < 8; i++ {
typ, l, err := quicvarint.Parse(b)
require.NoError(t, err)
var frame AckFrame
n, err := parseAckFrame(&frame, b[l:], FrameType(typ), protocol.AckDelayExponent+i, protocol.Version1)
require.NoError(t, err)
require.Equal(t, len(b[l:]), n)
require.Equal(t, delayTime*(1<<i), frame.DelayTime)
}
}
func TestParseACKHandleDelayTimeOverflow(t *testing.T) {
data := encodeVarInt(100) // largest acked
data = append(data, encodeVarInt(math.MaxUint64/5)...) // delay
data = append(data, encodeVarInt(0)...) // num blocks
data = append(data, encodeVarInt(0)...) // first ack block
var frame AckFrame
_, err := parseAckFrame(&frame, data, FrameTypeAck, protocol.AckDelayExponent, protocol.Version1)
require.NoError(t, err)
require.Greater(t, frame.DelayTime, time.Duration(0))
// The maximum encodable duration is ~292 years.
require.InDelta(t, 292*365*24, frame.DelayTime.Hours(), 365*24)
}
func TestParseACKErrorOnEOF(t *testing.T) {
data := encodeVarInt(1000) // largest acked
data = append(data, encodeVarInt(0)...) // delay
data = append(data, encodeVarInt(1)...) // num blocks
data = append(data, encodeVarInt(100)...) // first ack block
data = append(data, encodeVarInt(98)...) // gap
data = append(data, encodeVarInt(50)...) // ack block
var frame AckFrame
_, err := parseAckFrame(&frame, data, FrameTypeAck, protocol.AckDelayExponent, protocol.Version1)
require.NoError(t, err)
for i := range data {
var frame AckFrame
_, err := parseAckFrame(&frame, data[:i], FrameTypeAck, protocol.AckDelayExponent, protocol.Version1)
require.Equal(t, io.EOF, err)
}
}
func TestParseACKECN(t *testing.T) {
data := encodeVarInt(100) // largest acked
data = append(data, encodeVarInt(0)...) // delay
data = append(data, encodeVarInt(0)...) // num blocks
data = append(data, encodeVarInt(10)...) // first ack block
data = append(data, encodeVarInt(0x42)...) // ECT(0)
data = append(data, encodeVarInt(0x12345)...) // ECT(1)
data = append(data, encodeVarInt(0x12345678)...) // ECN-CE
var frame AckFrame
n, err := parseAckFrame(&frame, data, FrameTypeAckECN, protocol.AckDelayExponent, protocol.Version1)
require.NoError(t, err)
require.Equal(t, len(data), n)
require.Equal(t, protocol.PacketNumber(100), frame.LargestAcked())
require.Equal(t, protocol.PacketNumber(90), frame.LowestAcked())
require.False(t, frame.HasMissingRanges())
require.Equal(t, uint64(0x42), frame.ECT0)
require.Equal(t, uint64(0x12345), frame.ECT1)
require.Equal(t, uint64(0x12345678), frame.ECNCE)
}
func TestParseACKECNErrorOnEOF(t *testing.T) {
data := encodeVarInt(1000) // largest acked
data = append(data, encodeVarInt(0)...) // delay
data = append(data, encodeVarInt(1)...) // num blocks
data = append(data, encodeVarInt(100)...) // first ack block
data = append(data, encodeVarInt(98)...) // gap
data = append(data, encodeVarInt(50)...) // ack block
data = append(data, encodeVarInt(0x42)...) // ECT(0)
data = append(data, encodeVarInt(0x12345)...) // ECT(1)
data = append(data, encodeVarInt(0x12345678)...) // ECN-CE
var frame AckFrame
n, err := parseAckFrame(&frame, data, FrameTypeAckECN, protocol.AckDelayExponent, protocol.Version1)
require.NoError(t, err)
require.Equal(t, len(data), n)
for i := range data {
var frame AckFrame
_, err := parseAckFrame(&frame, data[:i], FrameTypeAckECN, protocol.AckDelayExponent, protocol.Version1)
require.Equal(t, io.EOF, err)
}
}
func TestWriteACKSimpleFrame(t *testing.T) {
f := &AckFrame{
AckRanges: []AckRange{{Smallest: 100, Largest: 1337}},
}
b, err := f.Append(nil, protocol.Version1)
require.NoError(t, err)
expected := []byte{byte(FrameTypeAck)}
expected = append(expected, encodeVarInt(1337)...) // largest acked
expected = append(expected, 0) // delay
expected = append(expected, encodeVarInt(0)...) // num ranges
expected = append(expected, encodeVarInt(1337-100)...)
require.Equal(t, expected, b)
}
func TestWriteACKECNFrame(t *testing.T) {
f := &AckFrame{
AckRanges: []AckRange{{Smallest: 10, Largest: 2000}},
ECT0: 13,
ECT1: 37,
ECNCE: 12345,
}
b, err := f.Append(nil, protocol.Version1)
require.NoError(t, err)
require.Len(t, b, int(f.Length(protocol.Version1)))
expected := []byte{byte(FrameTypeAckECN)}
expected = append(expected, encodeVarInt(2000)...) // largest acked
expected = append(expected, 0) // delay
expected = append(expected, encodeVarInt(0)...) // num ranges
expected = append(expected, encodeVarInt(2000-10)...)
expected = append(expected, encodeVarInt(13)...)
expected = append(expected, encodeVarInt(37)...)
expected = append(expected, encodeVarInt(12345)...)
require.Equal(t, expected, b)
}
func TestWriteACKSinglePacket(t *testing.T) {
f := &AckFrame{
AckRanges: []AckRange{{Smallest: 0x2eadbeef, Largest: 0x2eadbeef}},
DelayTime: 18 * time.Millisecond,
}
b, err := f.Append(nil, protocol.Version1)
require.NoError(t, err)
require.Len(t, b, int(f.Length(protocol.Version1)))
typ, l, err := quicvarint.Parse(b)
require.NoError(t, err)
b = b[l:]
var frame AckFrame
n, err := parseAckFrame(&frame, b, FrameType(typ), protocol.AckDelayExponent, protocol.Version1)
require.NoError(t, err)
require.Equal(t, len(b), n)
require.Equal(t, f, &frame)
require.False(t, frame.HasMissingRanges())
require.Equal(t, f.DelayTime, frame.DelayTime)
}
func TestWriteACKManyPackets(t *testing.T) {
f := &AckFrame{
AckRanges: []AckRange{{Smallest: 0x1337, Largest: 0x2eadbeef}},
}
b, err := f.Append(nil, protocol.Version1)
require.NoError(t, err)
require.Len(t, b, int(f.Length(protocol.Version1)))
typ, l, err := quicvarint.Parse(b)
require.NoError(t, err)
b = b[l:]
var frame AckFrame
n, err := parseAckFrame(&frame, b, FrameType(typ), protocol.AckDelayExponent, protocol.Version1)
require.NoError(t, err)
require.Equal(t, len(b), n)
require.Equal(t, f, &frame)
require.False(t, frame.HasMissingRanges())
}
func TestWriteACKSingleGap(t *testing.T) {
f := &AckFrame{
AckRanges: []AckRange{
{Smallest: 400, Largest: 1000},
{Smallest: 100, Largest: 200},
},
}
require.True(t, f.validateAckRanges())
b, err := f.Append(nil, protocol.Version1)
require.NoError(t, err)
require.Len(t, b, int(f.Length(protocol.Version1)))
typ, l, err := quicvarint.Parse(b)
require.NoError(t, err)
b = b[l:]
var frame AckFrame
n, err := parseAckFrame(&frame, b, FrameType(typ), protocol.AckDelayExponent, protocol.Version1)
require.NoError(t, err)
require.Equal(t, len(b), n)
require.Equal(t, f, &frame)
require.True(t, frame.HasMissingRanges())
}
func TestWriteACKMultipleRanges(t *testing.T) {
f := &AckFrame{
AckRanges: []AckRange{
{Smallest: 10, Largest: 10},
{Smallest: 8, Largest: 8},
{Smallest: 5, Largest: 6},
{Smallest: 1, Largest: 3},
},
}
require.True(t, f.validateAckRanges())
b, err := f.Append(nil, protocol.Version1)
require.NoError(t, err)
require.Len(t, b, int(f.Length(protocol.Version1)))
typ, l, err := quicvarint.Parse(b)
require.NoError(t, err)
b = b[l:]
var frame AckFrame
n, err := parseAckFrame(&frame, b, FrameType(typ), protocol.AckDelayExponent, protocol.Version1)
require.NoError(t, err)
require.Equal(t, len(b), n)
require.Equal(t, f, &frame)
require.True(t, frame.HasMissingRanges())
}
func TestWriteACKLimitMaxSize(t *testing.T) {
const numRanges = 1000
ackRanges := make([]AckRange, numRanges)
for i := protocol.PacketNumber(1); i <= numRanges; i++ {
ackRanges[numRanges-i] = AckRange{Smallest: 2 * i, Largest: 2 * i}
}
f := &AckFrame{AckRanges: ackRanges}
require.True(t, f.validateAckRanges())
b, err := f.Append(nil, protocol.Version1)
require.NoError(t, err)
require.Len(t, b, int(f.Length(protocol.Version1)))
// make sure the ACK frame is *a little bit* smaller than the MaxAckFrameSize
require.Greater(t, protocol.ByteCount(len(b)), protocol.MaxAckFrameSize-5)
require.LessOrEqual(t, protocol.ByteCount(len(b)), protocol.MaxAckFrameSize)
typ, l, err := quicvarint.Parse(b)
require.NoError(t, err)
b = b[l:]
var frame AckFrame
n, err := parseAckFrame(&frame, b, FrameType(typ), protocol.AckDelayExponent, protocol.Version1)
require.NoError(t, err)
require.Equal(t, len(b), n)
require.True(t, frame.HasMissingRanges())
require.Less(t, len(frame.AckRanges), numRanges) // make sure we dropped some ranges
}
func TestAckRangeValidator(t *testing.T) {
tests := []struct {
name string
ackRanges []AckRange
valid bool
}{
{
name: "rejects ACKs without ranges",
ackRanges: nil,
valid: false,
},
{
name: "accepts an ACK without NACK Ranges",
ackRanges: []AckRange{{Smallest: 1, Largest: 7}},
valid: true,
},
{
name: "rejects ACK ranges with Smallest greater than Largest",
ackRanges: []AckRange{
{Smallest: 8, Largest: 10},
{Smallest: 4, Largest: 3},
},
valid: false,
},
{
name: "rejects ACK ranges in the wrong order",
ackRanges: []AckRange{
{Smallest: 2, Largest: 2},
{Smallest: 6, Largest: 7},
},
valid: false,
},
{
name: "rejects with overlapping ACK ranges",
ackRanges: []AckRange{
{Smallest: 5, Largest: 7},
{Smallest: 2, Largest: 5},
},
valid: false,
},
{
name: "rejects ACK ranges that are part of a larger ACK range",
ackRanges: []AckRange{
{Smallest: 4, Largest: 7},
{Smallest: 5, Largest: 6},
},
valid: false,
},
{
name: "rejects with directly adjacent ACK ranges",
ackRanges: []AckRange{
{Smallest: 5, Largest: 7},
{Smallest: 2, Largest: 4},
},
valid: false,
},
{
name: "accepts an ACK with one lost packet",
ackRanges: []AckRange{
{Smallest: 5, Largest: 10},
{Smallest: 1, Largest: 3},
},
valid: true,
},
{
name: "accepts an ACK with multiple lost packets",
ackRanges: []AckRange{
{Smallest: 15, Largest: 20},
{Smallest: 10, Largest: 12},
{Smallest: 1, Largest: 3},
},
valid: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
ack := AckFrame{AckRanges: tt.ackRanges}
result := ack.validateAckRanges()
require.Equal(t, tt.valid, result)
})
}
}
func TestAckFrameAcksPacketWithoutRanges(t *testing.T) {
f := AckFrame{
AckRanges: []AckRange{{Smallest: 5, Largest: 10}},
}
require.False(t, f.AcksPacket(1))
require.False(t, f.AcksPacket(4))
require.True(t, f.AcksPacket(5))
require.True(t, f.AcksPacket(8))
require.True(t, f.AcksPacket(10))
require.False(t, f.AcksPacket(11))
require.False(t, f.AcksPacket(20))
}
func TestAckFrameAcksPacketWithMultipleRanges(t *testing.T) {
f := AckFrame{
AckRanges: []AckRange{
{Smallest: 15, Largest: 20},
{Smallest: 5, Largest: 8},
},
}
require.False(t, f.AcksPacket(4))
require.True(t, f.AcksPacket(5))
require.True(t, f.AcksPacket(6))
require.True(t, f.AcksPacket(7))
require.True(t, f.AcksPacket(8))
require.False(t, f.AcksPacket(9))
require.False(t, f.AcksPacket(14))
require.True(t, f.AcksPacket(15))
require.True(t, f.AcksPacket(18))
require.True(t, f.AcksPacket(19))
require.True(t, f.AcksPacket(20))
require.False(t, f.AcksPacket(21))
}
func TestAckFrameReset(t *testing.T) {
f := &AckFrame{
DelayTime: time.Second,
AckRanges: []AckRange{{Smallest: 1, Largest: 3}},
ECT0: 1,
ECT1: 2,
ECNCE: 3,
}
f.Reset()
require.Empty(t, f.AckRanges)
require.Equal(t, 1, cap(f.AckRanges))
require.Zero(t, f.DelayTime)
require.Zero(t, f.ECT0)
require.Zero(t, f.ECT1)
require.Zero(t, f.ECNCE)
}
|
