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use shorter packet numbers on Long Header packets

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This commit is contained in:
Marten Seemann 2020-02-26 11:26:15 +07:00
parent 5bfac02a44
commit fb65a017ac
2 changed files with 2 additions and 9 deletions
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6
packet_packer.go
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@ -636,12 +636,6 @@ func (p *packetPacker) getLongHeader(encLevel protocol.EncryptionLevel) *wire.Ex
hdr.PacketNumber = pn hdr.PacketNumber = pn
hdr.PacketNumberLen = pnLen hdr.PacketNumberLen = pnLen
if encLevel != protocol.Encryption0RTT {
// Always send long header packets with the maximum packet number length.
// This simplifies retransmissions: Since the header can't get any larger,
// we don't need to split CRYPTO frames.
hdr.PacketNumberLen = protocol.PacketNumberLen4
}
switch encLevel { switch encLevel {
case protocol.EncryptionInitial: case protocol.EncryptionInitial:

5
packet_packer_test.go
View file

@ -113,12 +113,11 @@ var _ = Describe("Packet packer", func() {
Context("generating a packet header", func() { Context("generating a packet header", func() {
It("uses the Long Header format", func() { It("uses the Long Header format", func() {
pnManager.EXPECT().PeekPacketNumber(protocol.EncryptionHandshake).Return(protocol.PacketNumber(0x42), protocol.PacketNumberLen2) pnManager.EXPECT().PeekPacketNumber(protocol.EncryptionHandshake).Return(protocol.PacketNumber(0x42), protocol.PacketNumberLen3)
h := packer.getLongHeader(protocol.EncryptionHandshake) h := packer.getLongHeader(protocol.EncryptionHandshake)
Expect(h.IsLongHeader).To(BeTrue()) Expect(h.IsLongHeader).To(BeTrue())
Expect(h.PacketNumber).To(Equal(protocol.PacketNumber(0x42))) Expect(h.PacketNumber).To(Equal(protocol.PacketNumber(0x42)))
// long headers always use 4 byte packet numbers, no matter what the packet number generator says Expect(h.PacketNumberLen).To(Equal(protocol.PacketNumberLen3))
Expect(h.PacketNumberLen).To(Equal(protocol.PacketNumberLen4))
Expect(h.Version).To(Equal(packer.version)) Expect(h.Version).To(Equal(packer.version))
}) })