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add Len() and ContainsPacketNumber() to NackRange

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This commit is contained in:
Marten Seemann 2016-04-27 16:04:50 +07:00
parent a4debcac71
commit 2c95141ee1
4 changed files with 65 additions and 10 deletions
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10
frames/ack_frame.go
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@ -8,12 +8,6 @@ import (
"github.com/lucas-clemente/quic-go/utils"
)
// NackRange is a NACK range
type NackRange struct {
FirstPacketNumber protocol.PacketNumber
LastPacketNumber protocol.PacketNumber
}
var errInvalidNackRanges = errors.New("AckFrame: ACK frame contains invalid NACK ranges")
// An AckFrame in QUIC
@ -45,7 +39,7 @@ func (f *AckFrame) Write(b *bytes.Buffer, packetNumber protocol.PacketNumber, pa
// calculate the number of NackRanges that are about to be written
// this number is different from len(f.NackRanges) for the case of contiguous NACK ranges
for _, nackRange := range f.NackRanges {
rangeLength := uint64(nackRange.LastPacketNumber - nackRange.FirstPacketNumber)
rangeLength := nackRange.Len()
numRanges += rangeLength/0xFF + 1
if rangeLength > 0 && rangeLength%0xFF == 0 {
numRanges--
@ -69,7 +63,7 @@ func (f *AckFrame) Write(b *bytes.Buffer, packetNumber protocol.PacketNumber, pa
lastNackRange := f.NackRanges[i-1]
missingPacketSequenceNumberDelta = uint64(lastNackRange.FirstPacketNumber) - uint64(nackRange.LastPacketNumber) - 1
}
rangeLength := nackRange.LastPacketNumber - nackRange.FirstPacketNumber
rangeLength := nackRange.Len()
utils.WriteUint48(b, missingPacketSequenceNumberDelta)
b.WriteByte(uint8(rangeLength % 0x100))