mirror of
https://github.com/refraction-networking/uquic.git
synced 2025-04-04 12:47:36 +03:00
481 lines
18 KiB
Go
481 lines
18 KiB
Go
package wire
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import (
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"bytes"
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"log"
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"os"
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"github.com/lucas-clemente/quic-go/internal/protocol"
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"github.com/lucas-clemente/quic-go/internal/utils"
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"github.com/lucas-clemente/quic-go/quicvarint"
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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)
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var _ = Describe("Header", func() {
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const versionIETFHeader = protocol.VersionTLS // a QUIC version that uses the IETF Header format
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Context("Writing", func() {
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var buf *bytes.Buffer
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BeforeEach(func() {
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buf = &bytes.Buffer{}
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})
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Context("Long Header", func() {
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srcConnID := protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8}
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It("writes", func() {
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Expect((&ExtendedHeader{
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Header: Header{
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IsLongHeader: true,
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Type: protocol.PacketTypeHandshake,
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DestConnectionID: protocol.ConnectionID{0xde, 0xad, 0xbe, 0xef, 0xca, 0xfe},
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SrcConnectionID: protocol.ConnectionID{0xde, 0xca, 0xfb, 0xad, 0x0, 0x0, 0x13, 0x37},
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Version: 0x1020304,
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Length: protocol.InitialPacketSizeIPv4,
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},
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PacketNumber: 0xdecaf,
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PacketNumberLen: protocol.PacketNumberLen3,
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}).Write(buf, versionIETFHeader)).To(Succeed())
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expected := []byte{
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0xc0 | 0x2<<4 | 0x2,
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0x1, 0x2, 0x3, 0x4, // version number
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0x6, // dest connection ID length
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0xde, 0xad, 0xbe, 0xef, 0xca, 0xfe, // dest connection ID
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0x8, // src connection ID length
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0xde, 0xca, 0xfb, 0xad, 0x0, 0x0, 0x13, 0x37, // source connection ID
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}
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expected = append(expected, encodeVarInt(protocol.InitialPacketSizeIPv4)...) // length
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expected = append(expected, []byte{0xd, 0xec, 0xaf}...) // packet number
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Expect(buf.Bytes()).To(Equal(expected))
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})
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It("refuses to write a header with a too long connection ID", func() {
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err := (&ExtendedHeader{
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Header: Header{
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IsLongHeader: true,
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SrcConnectionID: srcConnID,
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DestConnectionID: protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21}, // connection IDs must be at most 20 bytes long
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Version: 0x1020304,
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Type: 0x5,
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},
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PacketNumber: 0xdecafbad,
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PacketNumberLen: protocol.PacketNumberLen4,
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}).Write(buf, versionIETFHeader)
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Expect(err).To(MatchError("invalid connection ID length: 21 bytes"))
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})
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It("writes a header with a 20 byte connection ID", func() {
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err := (&ExtendedHeader{
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Header: Header{
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IsLongHeader: true,
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SrcConnectionID: srcConnID,
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DestConnectionID: protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20}, // connection IDs must be at most 20 bytes long
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Version: 0x1020304,
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Type: 0x5,
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},
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PacketNumber: 0xdecafbad,
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PacketNumberLen: protocol.PacketNumberLen4,
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}).Write(buf, versionIETFHeader)
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Expect(err).ToNot(HaveOccurred())
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Expect(buf.Bytes()).To(ContainSubstring(string([]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20})))
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})
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It("writes an Initial containing a token", func() {
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token := []byte("Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.")
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Expect((&ExtendedHeader{
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Header: Header{
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IsLongHeader: true,
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Version: 0x1020304,
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Type: protocol.PacketTypeInitial,
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Token: token,
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},
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PacketNumber: 0xdecafbad,
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PacketNumberLen: protocol.PacketNumberLen4,
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}).Write(buf, versionIETFHeader)).To(Succeed())
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Expect(buf.Bytes()[0]>>4&0b11 == 0)
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expectedSubstring := append(encodeVarInt(uint64(len(token))), token...)
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Expect(buf.Bytes()).To(ContainSubstring(string(expectedSubstring)))
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})
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It("uses a 2-byte encoding for the length on Initial packets", func() {
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Expect((&ExtendedHeader{
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Header: Header{
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IsLongHeader: true,
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Version: 0x1020304,
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Type: protocol.PacketTypeInitial,
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Length: 37,
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},
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PacketNumber: 0xdecafbad,
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PacketNumberLen: protocol.PacketNumberLen4,
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}).Write(buf, versionIETFHeader)).To(Succeed())
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b := &bytes.Buffer{}
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quicvarint.WriteWithLen(b, 37, 2)
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Expect(buf.Bytes()[buf.Len()-6 : buf.Len()-4]).To(Equal(b.Bytes()))
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})
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It("writes a Retry packet", func() {
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token := []byte("Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.")
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Expect((&ExtendedHeader{Header: Header{
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IsLongHeader: true,
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Version: protocol.Version1,
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Type: protocol.PacketTypeRetry,
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Token: token,
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}}).Write(buf, versionIETFHeader)).To(Succeed())
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expected := []byte{0xc0 | 0b11<<4}
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expected = appendVersion(expected, protocol.Version1)
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expected = append(expected, 0x0) // dest connection ID length
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expected = append(expected, 0x0) // src connection ID length
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expected = append(expected, token...)
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Expect(buf.Bytes()).To(Equal(expected))
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})
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})
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Context("long header, version 2", func() {
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It("writes an Initial", func() {
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Expect((&ExtendedHeader{
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Header: Header{
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IsLongHeader: true,
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Version: protocol.Version2,
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Type: protocol.PacketTypeInitial,
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},
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PacketNumber: 0xdecafbad,
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PacketNumberLen: protocol.PacketNumberLen4,
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}).Write(buf, protocol.Version2)).To(Succeed())
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Expect(buf.Bytes()[0]>>4&0b11 == 0b01)
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})
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It("writes a Retry packet", func() {
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token := []byte("Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.")
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Expect((&ExtendedHeader{Header: Header{
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IsLongHeader: true,
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Version: protocol.Version2,
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Type: protocol.PacketTypeRetry,
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Token: token,
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}}).Write(buf, versionIETFHeader)).To(Succeed())
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expected := []byte{0xc0 | 0b11<<4}
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expected = appendVersion(expected, protocol.Version2)
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expected = append(expected, 0x0) // dest connection ID length
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expected = append(expected, 0x0) // src connection ID length
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expected = append(expected, token...)
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Expect(buf.Bytes()).To(Equal(expected))
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})
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It("writes a Handshake Packet", func() {
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Expect((&ExtendedHeader{
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Header: Header{
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IsLongHeader: true,
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Version: protocol.Version2,
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Type: protocol.PacketTypeHandshake,
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},
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PacketNumber: 0xdecafbad,
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PacketNumberLen: protocol.PacketNumberLen4,
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}).Write(buf, protocol.Version2)).To(Succeed())
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Expect(buf.Bytes()[0]>>4&0b11 == 0b11)
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})
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It("writes a 0-RTT Packet", func() {
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Expect((&ExtendedHeader{
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Header: Header{
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IsLongHeader: true,
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Version: protocol.Version2,
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Type: protocol.PacketType0RTT,
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},
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PacketNumber: 0xdecafbad,
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PacketNumberLen: protocol.PacketNumberLen4,
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}).Write(buf, protocol.Version2)).To(Succeed())
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Expect(buf.Bytes()[0]>>4&0b11 == 0b10)
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})
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})
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Context("short header", func() {
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It("writes a header with connection ID", func() {
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Expect((&ExtendedHeader{
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Header: Header{
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DestConnectionID: protocol.ConnectionID{0xde, 0xad, 0xbe, 0xef, 0xca, 0xfe, 0x13, 0x37},
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},
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PacketNumberLen: protocol.PacketNumberLen1,
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PacketNumber: 0x42,
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}).Write(buf, versionIETFHeader)).To(Succeed())
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Expect(buf.Bytes()).To(Equal([]byte{
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0x40,
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0xde, 0xad, 0xbe, 0xef, 0xca, 0xfe, 0x13, 0x37, // connection ID
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0x42, // packet number
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}))
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})
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It("writes a header without connection ID", func() {
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Expect((&ExtendedHeader{
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PacketNumberLen: protocol.PacketNumberLen1,
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PacketNumber: 0x42,
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}).Write(buf, versionIETFHeader)).To(Succeed())
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Expect(buf.Bytes()).To(Equal([]byte{
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0x40,
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0x42, // packet number
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}))
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})
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It("writes a header with a 2 byte packet number", func() {
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Expect((&ExtendedHeader{
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PacketNumberLen: protocol.PacketNumberLen2,
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PacketNumber: 0x765,
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}).Write(buf, versionIETFHeader)).To(Succeed())
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expected := []byte{0x40 | 0x1}
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expected = append(expected, []byte{0x7, 0x65}...) // packet number
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Expect(buf.Bytes()).To(Equal(expected))
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})
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It("writes a header with a 4 byte packet number", func() {
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Expect((&ExtendedHeader{
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PacketNumberLen: protocol.PacketNumberLen4,
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PacketNumber: 0x12345678,
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}).Write(buf, versionIETFHeader)).To(Succeed())
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expected := []byte{0x40 | 0x3}
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expected = append(expected, []byte{0x12, 0x34, 0x56, 0x78}...)
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Expect(buf.Bytes()).To(Equal(expected))
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})
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It("errors when given an invalid packet number length", func() {
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err := (&ExtendedHeader{
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PacketNumberLen: 5,
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PacketNumber: 0xdecafbad,
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}).Write(buf, versionIETFHeader)
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Expect(err).To(MatchError("invalid packet number length: 5"))
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})
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It("writes the Key Phase Bit", func() {
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Expect((&ExtendedHeader{
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KeyPhase: protocol.KeyPhaseOne,
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PacketNumberLen: protocol.PacketNumberLen1,
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PacketNumber: 0x42,
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}).Write(buf, versionIETFHeader)).To(Succeed())
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Expect(buf.Bytes()).To(Equal([]byte{
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0x40 | 0x4,
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0x42, // packet number
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}))
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})
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})
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})
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Context("getting the length", func() {
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var buf *bytes.Buffer
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BeforeEach(func() {
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buf = &bytes.Buffer{}
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})
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It("has the right length for the Long Header, for a short length", func() {
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h := &ExtendedHeader{
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Header: Header{
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IsLongHeader: true,
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Type: protocol.PacketTypeHandshake,
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DestConnectionID: protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8},
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SrcConnectionID: protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8},
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Length: 1,
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},
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PacketNumberLen: protocol.PacketNumberLen1,
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}
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expectedLen := 1 /* type byte */ + 4 /* version */ + 1 /* dest conn ID len */ + 8 /* dest conn id */ + 1 /* src conn ID len */ + 8 /* src conn id */ + 2 /* length */ + 1 /* packet number */
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Expect(h.GetLength(versionIETFHeader)).To(BeEquivalentTo(expectedLen))
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Expect(h.Write(buf, versionIETFHeader)).To(Succeed())
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Expect(buf.Len()).To(Equal(expectedLen))
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})
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It("has the right length for the Long Header, for a long length", func() {
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h := &ExtendedHeader{
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Header: Header{
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IsLongHeader: true,
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Type: protocol.PacketTypeHandshake,
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DestConnectionID: protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8},
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SrcConnectionID: protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8},
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Length: 1500,
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},
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PacketNumberLen: protocol.PacketNumberLen2,
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}
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expectedLen := 1 /* type byte */ + 4 /* version */ + 1 /* dest conn id len */ + 8 /* dest conn id */ + 1 /* src conn ID len */ + 8 /* src conn id */ + 2 /* long len */ + 2 /* packet number */
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Expect(h.GetLength(versionIETFHeader)).To(BeEquivalentTo(expectedLen))
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Expect(h.Write(buf, versionIETFHeader)).To(Succeed())
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Expect(buf.Len()).To(Equal(expectedLen))
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})
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It("has the right length for an Initial that has a short length", func() {
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h := &ExtendedHeader{
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Header: Header{
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IsLongHeader: true,
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Type: protocol.PacketTypeInitial,
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DestConnectionID: protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8},
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SrcConnectionID: protocol.ConnectionID{1, 2, 3, 4},
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Length: 15,
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},
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PacketNumberLen: protocol.PacketNumberLen2,
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}
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expectedLen := 1 /* type byte */ + 4 /* version */ + 1 /* dest conn id len */ + 8 /* dest conn id */ + 1 /* src conn ID len */ + 4 /* src conn id */ + 1 /* token length */ + 2 /* length len */ + 2 /* packet number */
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Expect(h.GetLength(versionIETFHeader)).To(BeEquivalentTo(expectedLen))
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Expect(h.Write(buf, versionIETFHeader)).To(Succeed())
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Expect(buf.Len()).To(Equal(expectedLen))
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})
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It("has the right length for an Initial not containing a Token", func() {
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h := &ExtendedHeader{
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Header: Header{
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IsLongHeader: true,
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Type: protocol.PacketTypeInitial,
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DestConnectionID: protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8},
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SrcConnectionID: protocol.ConnectionID{1, 2, 3, 4},
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Length: 1500,
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},
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PacketNumberLen: protocol.PacketNumberLen2,
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}
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expectedLen := 1 /* type byte */ + 4 /* version */ + 1 /* dest conn id len */ + 8 /* dest conn id */ + 1 /* src conn ID len */ + 4 /* src conn id */ + 1 /* token length */ + 2 /* length len */ + 2 /* packet number */
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Expect(h.GetLength(versionIETFHeader)).To(BeEquivalentTo(expectedLen))
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Expect(h.Write(buf, versionIETFHeader)).To(Succeed())
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Expect(buf.Len()).To(Equal(expectedLen))
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})
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It("has the right length for an Initial containing a Token", func() {
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h := &ExtendedHeader{
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Header: Header{
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IsLongHeader: true,
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DestConnectionID: protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8},
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SrcConnectionID: protocol.ConnectionID{1, 2, 3, 4},
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Type: protocol.PacketTypeInitial,
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Length: 1500,
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Token: []byte("foo"),
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},
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PacketNumberLen: protocol.PacketNumberLen2,
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}
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expectedLen := 1 /* type byte */ + 4 /* version */ + 1 /* dest conn id len */ + 8 /* dest conn id */ + 1 /* src conn id len */ + 4 /* src conn id */ + 1 /* token length */ + 3 /* token */ + 2 /* long len */ + 2 /* packet number */
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Expect(h.GetLength(versionIETFHeader)).To(BeEquivalentTo(expectedLen))
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Expect(h.Write(buf, versionIETFHeader)).To(Succeed())
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Expect(buf.Len()).To(Equal(expectedLen))
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})
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It("has the right length for a Short Header containing a connection ID", func() {
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h := &ExtendedHeader{
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Header: Header{
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DestConnectionID: protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8},
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},
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PacketNumberLen: protocol.PacketNumberLen1,
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}
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Expect(h.GetLength(versionIETFHeader)).To(Equal(protocol.ByteCount(1 + 8 + 1)))
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Expect(h.Write(buf, versionIETFHeader)).To(Succeed())
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Expect(buf.Len()).To(Equal(10))
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})
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It("has the right length for a short header without a connection ID", func() {
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h := &ExtendedHeader{PacketNumberLen: protocol.PacketNumberLen1}
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Expect(h.GetLength(versionIETFHeader)).To(Equal(protocol.ByteCount(1 + 1)))
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Expect(h.Write(buf, versionIETFHeader)).To(Succeed())
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Expect(buf.Len()).To(Equal(2))
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})
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It("has the right length for a short header with a 2 byte packet number", func() {
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h := &ExtendedHeader{PacketNumberLen: protocol.PacketNumberLen2}
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Expect(h.GetLength(versionIETFHeader)).To(Equal(protocol.ByteCount(1 + 2)))
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Expect(h.Write(buf, versionIETFHeader)).To(Succeed())
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Expect(buf.Len()).To(Equal(3))
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})
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It("has the right length for a short header with a 5 byte packet number", func() {
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h := &ExtendedHeader{PacketNumberLen: protocol.PacketNumberLen4}
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Expect(h.GetLength(versionIETFHeader)).To(Equal(protocol.ByteCount(1 + 4)))
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Expect(h.Write(buf, versionIETFHeader)).To(Succeed())
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Expect(buf.Len()).To(Equal(5))
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})
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})
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Context("Logging", func() {
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var (
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buf *bytes.Buffer
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logger utils.Logger
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)
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BeforeEach(func() {
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buf = &bytes.Buffer{}
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logger = utils.DefaultLogger
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logger.SetLogLevel(utils.LogLevelDebug)
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log.SetOutput(buf)
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})
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AfterEach(func() {
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log.SetOutput(os.Stdout)
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})
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It("logs Long Headers", func() {
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(&ExtendedHeader{
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Header: Header{
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IsLongHeader: true,
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DestConnectionID: protocol.ConnectionID{0xde, 0xad, 0xbe, 0xef, 0xca, 0xfe, 0x13, 0x37},
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SrcConnectionID: protocol.ConnectionID{0xde, 0xca, 0xfb, 0xad, 0x013, 0x37, 0x13, 0x37},
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Type: protocol.PacketTypeHandshake,
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Length: 54321,
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Version: 0xfeed,
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},
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PacketNumber: 1337,
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PacketNumberLen: protocol.PacketNumberLen2,
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}).Log(logger)
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Expect(buf.String()).To(ContainSubstring("Long Header{Type: Handshake, DestConnectionID: deadbeefcafe1337, SrcConnectionID: decafbad13371337, PacketNumber: 1337, PacketNumberLen: 2, Length: 54321, Version: 0xfeed}"))
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})
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It("logs Initial Packets with a Token", func() {
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(&ExtendedHeader{
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Header: Header{
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IsLongHeader: true,
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DestConnectionID: protocol.ConnectionID{0xca, 0xfe, 0x13, 0x37},
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SrcConnectionID: protocol.ConnectionID{0xde, 0xca, 0xfb, 0xad},
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Type: protocol.PacketTypeInitial,
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Token: []byte{0xde, 0xad, 0xbe, 0xef},
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Length: 100,
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Version: 0xfeed,
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},
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PacketNumber: 42,
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PacketNumberLen: protocol.PacketNumberLen2,
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}).Log(logger)
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Expect(buf.String()).To(ContainSubstring("Long Header{Type: Initial, DestConnectionID: cafe1337, SrcConnectionID: decafbad, Token: 0xdeadbeef, PacketNumber: 42, PacketNumberLen: 2, Length: 100, Version: 0xfeed}"))
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})
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It("logs Initial packets without a Token", func() {
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(&ExtendedHeader{
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Header: Header{
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IsLongHeader: true,
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DestConnectionID: protocol.ConnectionID{0xca, 0xfe, 0x13, 0x37},
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|
SrcConnectionID: protocol.ConnectionID{0xde, 0xca, 0xfb, 0xad},
|
|
Type: protocol.PacketTypeInitial,
|
|
Length: 100,
|
|
Version: 0xfeed,
|
|
},
|
|
PacketNumber: 42,
|
|
PacketNumberLen: protocol.PacketNumberLen2,
|
|
}).Log(logger)
|
|
Expect(buf.String()).To(ContainSubstring("Long Header{Type: Initial, DestConnectionID: cafe1337, SrcConnectionID: decafbad, Token: (empty), PacketNumber: 42, PacketNumberLen: 2, Length: 100, Version: 0xfeed}"))
|
|
})
|
|
|
|
It("logs Retry packets with a Token", func() {
|
|
(&ExtendedHeader{
|
|
Header: Header{
|
|
IsLongHeader: true,
|
|
DestConnectionID: protocol.ConnectionID{0xca, 0xfe, 0x13, 0x37},
|
|
SrcConnectionID: protocol.ConnectionID{0xde, 0xca, 0xfb, 0xad},
|
|
Type: protocol.PacketTypeRetry,
|
|
Token: []byte{0x12, 0x34, 0x56},
|
|
Version: 0xfeed,
|
|
},
|
|
}).Log(logger)
|
|
Expect(buf.String()).To(ContainSubstring("Long Header{Type: Retry, DestConnectionID: cafe1337, SrcConnectionID: decafbad, Token: 0x123456, Version: 0xfeed}"))
|
|
})
|
|
|
|
It("logs Short Headers containing a connection ID", func() {
|
|
(&ExtendedHeader{
|
|
Header: Header{
|
|
DestConnectionID: protocol.ConnectionID{0xde, 0xad, 0xbe, 0xef, 0xca, 0xfe, 0x13, 0x37},
|
|
},
|
|
KeyPhase: protocol.KeyPhaseOne,
|
|
PacketNumber: 1337,
|
|
PacketNumberLen: 4,
|
|
}).Log(logger)
|
|
Expect(buf.String()).To(ContainSubstring("Short Header{DestConnectionID: deadbeefcafe1337, PacketNumber: 1337, PacketNumberLen: 4, KeyPhase: 1}"))
|
|
})
|
|
})
|
|
})
|