mirror of
https://github.com/refraction-networking/uquic.git
synced 2025-04-04 20:57:36 +03:00
393 lines
16 KiB
Go
393 lines
16 KiB
Go
package wire
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import (
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"bytes"
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"encoding/binary"
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"io"
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"github.com/lucas-clemente/quic-go/internal/protocol"
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"github.com/lucas-clemente/quic-go/internal/qerr"
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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 Parsing", func() {
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appendVersion := func(data []byte, v protocol.VersionNumber) []byte {
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offset := len(data)
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data = append(data, []byte{0, 0, 0, 0}...)
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binary.BigEndian.PutUint32(data[offset:], uint32(versionIETFFrames))
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return data
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}
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Context("Version Negotiation Packets", func() {
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It("parses", func() {
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srcConnID := protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
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destConnID := protocol.ConnectionID{9, 8, 7, 6, 5, 4, 3, 2, 1}
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versions := []protocol.VersionNumber{0x22334455, 0x33445566}
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data, err := ComposeVersionNegotiation(destConnID, srcConnID, versions)
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Expect(err).ToNot(HaveOccurred())
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b := bytes.NewReader(data)
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hdr, err := ParseHeader(b, 0)
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Expect(err).ToNot(HaveOccurred())
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Expect(hdr.DestConnectionID).To(Equal(destConnID))
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Expect(hdr.SrcConnectionID).To(Equal(srcConnID))
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Expect(hdr.IsLongHeader).To(BeTrue())
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Expect(hdr.IsVersionNegotiation()).To(BeTrue())
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Expect(hdr.Version).To(BeZero())
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for _, v := range versions {
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Expect(hdr.SupportedVersions).To(ContainElement(v))
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}
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Expect(b.Len()).To(BeZero())
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})
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It("errors if it contains versions of the wrong length", func() {
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connID := protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8}
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versions := []protocol.VersionNumber{0x22334455, 0x33445566}
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data, err := ComposeVersionNegotiation(connID, connID, versions)
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Expect(err).ToNot(HaveOccurred())
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data = data[:len(data)-2]
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_, err = ParseHeader(bytes.NewReader(data), 0)
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Expect(err).To(MatchError(qerr.InvalidVersionNegotiationPacket))
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})
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It("errors if the version list is empty", func() {
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connID := protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8}
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versions := []protocol.VersionNumber{0x22334455}
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data, err := ComposeVersionNegotiation(connID, connID, versions)
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Expect(err).ToNot(HaveOccurred())
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// remove 8 bytes (two versions), since ComposeVersionNegotiation also added a reserved version number
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data = data[:len(data)-8]
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_, err = ParseHeader(bytes.NewReader(data), 0)
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Expect(err).To(MatchError("InvalidVersionNegotiationPacket: empty version list"))
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})
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})
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Context("Long Headers", func() {
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It("parses a Long Header", func() {
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destConnID := protocol.ConnectionID{9, 8, 7, 6, 5, 4, 3, 2, 1}
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srcConnID := protocol.ConnectionID{0xde, 0xad, 0xbe, 0xef}
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data := []byte{0xc0 ^ 0x3}
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data = appendVersion(data, versionIETFFrames)
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data = append(data, 0x61) // connection ID lengths
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data = append(data, destConnID...)
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data = append(data, srcConnID...)
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data = append(data, encodeVarInt(6)...) // token length
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data = append(data, []byte("foobar")...) // token
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data = append(data, encodeVarInt(0x1337)...) // length
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hdrLen := len(data)
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data = append(data, []byte{0, 0, 0xbe, 0xef}...)
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hdr, err := ParseHeader(bytes.NewReader(data), 0)
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Expect(err).ToNot(HaveOccurred())
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Expect(hdr.IsLongHeader).To(BeTrue())
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Expect(hdr.IsVersionNegotiation()).To(BeFalse())
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Expect(hdr.DestConnectionID).To(Equal(destConnID))
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Expect(hdr.SrcConnectionID).To(Equal(srcConnID))
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Expect(hdr.Type).To(Equal(protocol.PacketTypeInitial))
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Expect(hdr.Token).To(Equal([]byte("foobar")))
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Expect(hdr.Length).To(Equal(protocol.ByteCount(0x1337)))
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Expect(hdr.Version).To(Equal(versionIETFFrames))
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b := bytes.NewReader(data)
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extHdr, err := hdr.ParseExtended(b, versionIETFFrames)
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Expect(err).ToNot(HaveOccurred())
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Expect(extHdr.PacketNumber).To(Equal(protocol.PacketNumber(0xbeef)))
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Expect(extHdr.PacketNumberLen).To(Equal(protocol.PacketNumberLen4))
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Expect(b.Len()).To(BeZero())
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Expect(hdr.ParsedLen()).To(BeEquivalentTo(hdrLen))
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})
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It("errors if 0x40 is not set", func() {
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data := []byte{
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0x80 | 0x2<<4,
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0x11, // connection ID lengths
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0xde, 0xca, 0xfb, 0xad, // dest conn ID
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0xde, 0xad, 0xbe, 0xef, // src conn ID
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}
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_, err := ParseHeader(bytes.NewReader(data), 0)
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Expect(err).To(MatchError("not a QUIC packet"))
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})
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It("stops parsing when encountering an unsupported version", func() {
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data := []byte{
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0xc0,
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0xde, 0xad, 0xbe, 0xef,
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0x55, // connection ID length
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0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8,
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0x8, 0x7, 0x6, 0x5, 0x4, 0x3, 0x2, 0x1,
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'f', 'o', 'o', 'b', 'a', 'r', // unspecified bytes
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}
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b := bytes.NewReader(data)
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hdr, err := ParseHeader(b, 0)
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Expect(err).ToNot(HaveOccurred())
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Expect(hdr.IsLongHeader).To(BeTrue())
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Expect(hdr.Version).To(Equal(protocol.VersionNumber(0xdeadbeef)))
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Expect(hdr.DestConnectionID).To(Equal(protocol.ConnectionID{0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8}))
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Expect(hdr.SrcConnectionID).To(Equal(protocol.ConnectionID{0x8, 0x7, 0x6, 0x5, 0x4, 0x3, 0x2, 0x1}))
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Expect(b.Len()).To(Equal(6))
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})
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It("parses a Long Header without a destination connection ID", func() {
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data := []byte{0xc0 ^ 0x1<<4}
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data = appendVersion(data, versionIETFFrames)
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data = append(data, 0x01) // connection ID lengths
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data = append(data, []byte{0xde, 0xad, 0xbe, 0xef}...) // source connection ID
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data = append(data, encodeVarInt(0x42)...) // length
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data = append(data, []byte{0xde, 0xca, 0xfb, 0xad}...)
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hdr, err := ParseHeader(bytes.NewReader(data), 0)
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Expect(err).ToNot(HaveOccurred())
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Expect(hdr.Type).To(Equal(protocol.PacketType0RTT))
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Expect(hdr.SrcConnectionID).To(Equal(protocol.ConnectionID{0xde, 0xad, 0xbe, 0xef}))
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Expect(hdr.DestConnectionID).To(BeEmpty())
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})
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It("parses a Long Header without a source connection ID", func() {
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data := []byte{0xc0 ^ 0x2<<4}
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data = appendVersion(data, versionIETFFrames)
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data = append(data, 0x70) // connection ID lengths
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data = append(data, []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}...) // source connection ID
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data = append(data, encodeVarInt(0x42)...) // length
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data = append(data, []byte{0xde, 0xca, 0xfb, 0xad}...)
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hdr, err := ParseHeader(bytes.NewReader(data), 0)
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Expect(err).ToNot(HaveOccurred())
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Expect(hdr.SrcConnectionID).To(BeEmpty())
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Expect(hdr.DestConnectionID).To(Equal(protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}))
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})
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It("parses a Long Header with a 2 byte packet number", func() {
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data := []byte{0xc0 ^ 0x1}
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data = appendVersion(data, versionIETFFrames) // version number
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data = append(data, 0x0) // connection ID lengths
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data = append(data, encodeVarInt(0)...) // token length
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data = append(data, encodeVarInt(0x42)...) // length
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data = append(data, []byte{0x1, 0x23}...)
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hdr, err := ParseHeader(bytes.NewReader(data), 0)
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Expect(err).ToNot(HaveOccurred())
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Expect(hdr.Length).To(BeEquivalentTo(0x42))
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b := bytes.NewReader(data)
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extHdr, err := hdr.ParseExtended(b, versionIETFFrames)
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Expect(err).ToNot(HaveOccurred())
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Expect(extHdr.PacketNumber).To(Equal(protocol.PacketNumber(0x123)))
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Expect(extHdr.PacketNumberLen).To(Equal(protocol.PacketNumberLen2))
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Expect(b.Len()).To(BeZero())
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})
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It("parses a Retry packet", func() {
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data := []byte{0xc0 | 0x3<<4 | (10 - 3) /* connection ID length */}
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data = appendVersion(data, versionIETFFrames)
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data = append(data, 0x0) // connection ID lengths
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data = append(data, []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}...) // source connection ID
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data = append(data, []byte{'f', 'o', 'o', 'b', 'a', 'r'}...) // token
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b := bytes.NewReader(data)
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hdr, err := ParseHeader(b, 0)
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Expect(err).ToNot(HaveOccurred())
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Expect(hdr.Type).To(Equal(protocol.PacketTypeRetry))
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Expect(hdr.OrigDestConnectionID).To(Equal(protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}))
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Expect(hdr.Token).To(Equal([]byte("foobar")))
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})
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It("errors if the token length is too large", func() {
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data := []byte{0xc0 ^ 0x1}
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data = appendVersion(data, versionIETFFrames)
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data = append(data, 0x0) // connection ID lengths
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data = append(data, encodeVarInt(4)...) // token length: 4 bytes (1 byte too long)
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data = append(data, encodeVarInt(0x42)...) // length, 1 byte
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data = append(data, []byte{0x12, 0x34}...) // packet number
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_, err := ParseHeader(bytes.NewReader(data), 0)
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Expect(err).To(MatchError(io.EOF))
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})
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It("errors if the 5th or 6th bit are set", func() {
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data := []byte{0xc0 | 0x2<<4 | 0x8 /* set the 5th bit */}
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data = appendVersion(data, versionIETFFrames)
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data = append(data, 0x0) // connection ID lengths
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data = append(data, 0x42) // packet number
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data = append(data, encodeVarInt(1)...) // length
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hdr, err := ParseHeader(bytes.NewReader(data), 0)
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Expect(err).ToNot(HaveOccurred())
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Expect(hdr.Type).To(Equal(protocol.PacketTypeHandshake))
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_, err = hdr.ParseExtended(bytes.NewReader(data), versionIETFFrames)
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Expect(err).To(MatchError("5th and 6th bit must be 0"))
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})
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It("errors on EOF, when parsing the header", func() {
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data := []byte{0xc0 ^ 0x2<<4}
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data = appendVersion(data, versionIETFFrames)
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data = append(data, 0x55) // connection ID lengths
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data = append(data, []byte{0xde, 0xad, 0xbe, 0xef, 0xca, 0xfe, 0x13, 0x37}...) // destination connection ID
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data = append(data, []byte{0xde, 0xad, 0xbe, 0xef, 0xca, 0xfe, 0x13, 0x37}...) // source connection ID
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for i := 0; i < len(data); i++ {
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_, err := ParseHeader(bytes.NewReader(data[:i]), 0)
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Expect(err).To(Equal(io.EOF))
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}
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})
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It("errors on EOF, when parsing the extended header", func() {
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data := []byte{0xc0 | 0x2<<4 | 0x3}
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data = appendVersion(data, versionIETFFrames)
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data = append(data, 0x0) // connection ID lengths
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data = append(data, encodeVarInt(0x1337)...)
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hdrLen := len(data)
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data = append(data, []byte{0xde, 0xad, 0xbe, 0xef}...) // packet number
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for i := hdrLen; i < len(data); i++ {
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data = data[:i]
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hdr, err := ParseHeader(bytes.NewReader(data), 0)
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Expect(err).ToNot(HaveOccurred())
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b := bytes.NewReader(data)
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_, err = hdr.ParseExtended(b, versionIETFFrames)
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Expect(err).To(Equal(io.EOF))
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}
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})
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It("errors on EOF, for a Retry packet", func() {
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data := []byte{0xc0 ^ 0x3<<4}
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data = appendVersion(data, versionIETFFrames)
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data = append(data, 0x0) // connection ID lengths
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data = append(data, 0x97) // Orig Destination Connection ID length
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data = append(data, []byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}...) // source connection ID
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hdrLen := len(data)
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for i := hdrLen; i < len(data); i++ {
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data = data[:i]
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hdr, err := ParseHeader(bytes.NewReader(data), 0)
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Expect(err).ToNot(HaveOccurred())
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b := bytes.NewReader(data)
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_, err = hdr.ParseExtended(b, versionIETFFrames)
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Expect(err).To(Equal(io.EOF))
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}
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})
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})
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Context("Short Headers", func() {
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It("reads a Short Header with a 8 byte connection ID", func() {
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connID := protocol.ConnectionID{0xde, 0xad, 0xbe, 0xef, 0xca, 0xfe, 0x13, 0x37}
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data := append([]byte{0x40}, connID...)
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data = append(data, 0x42) // packet number
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hdr, err := ParseHeader(bytes.NewReader(data), 8)
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Expect(err).ToNot(HaveOccurred())
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Expect(hdr.IsLongHeader).To(BeFalse())
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Expect(hdr.IsVersionNegotiation()).To(BeFalse())
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Expect(hdr.DestConnectionID).To(Equal(connID))
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b := bytes.NewReader(data)
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extHdr, err := hdr.ParseExtended(b, versionIETFFrames)
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Expect(err).ToNot(HaveOccurred())
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Expect(extHdr.KeyPhase).To(Equal(0))
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Expect(extHdr.DestConnectionID).To(Equal(connID))
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Expect(extHdr.SrcConnectionID).To(BeEmpty())
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Expect(extHdr.PacketNumber).To(Equal(protocol.PacketNumber(0x42)))
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Expect(b.Len()).To(BeZero())
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})
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It("errors if 0x40 is not set", func() {
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connID := protocol.ConnectionID{0xde, 0xad, 0xbe, 0xef, 0xca, 0xfe, 0x13, 0x37}
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data := append([]byte{0x0}, connID...)
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_, err := ParseHeader(bytes.NewReader(data), 8)
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Expect(err).To(MatchError("not a QUIC packet"))
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})
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It("errors if the 4th or 5th bit are set", func() {
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connID := protocol.ConnectionID{1, 2, 3, 4, 5}
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data := append([]byte{0x40 | 0x10 /* set the 4th bit */}, connID...)
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hdr, err := ParseHeader(bytes.NewReader(data), 5)
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Expect(err).ToNot(HaveOccurred())
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Expect(hdr.IsLongHeader).To(BeFalse())
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_, err = hdr.ParseExtended(bytes.NewReader(data), versionIETFFrames)
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Expect(err).To(MatchError("4th and 5th bit must be 0"))
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})
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It("reads a Short Header with a 5 byte connection ID", func() {
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connID := protocol.ConnectionID{1, 2, 3, 4, 5}
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data := append([]byte{0x40}, connID...)
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data = append(data, 0x42) // packet number
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hdr, err := ParseHeader(bytes.NewReader(data), 5)
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Expect(err).ToNot(HaveOccurred())
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Expect(hdr.IsLongHeader).To(BeFalse())
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Expect(hdr.DestConnectionID).To(Equal(connID))
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b := bytes.NewReader(data)
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extHdr, err := hdr.ParseExtended(b, versionIETFFrames)
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Expect(err).ToNot(HaveOccurred())
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Expect(extHdr.KeyPhase).To(Equal(0))
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Expect(extHdr.DestConnectionID).To(Equal(connID))
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Expect(extHdr.SrcConnectionID).To(BeEmpty())
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Expect(b.Len()).To(BeZero())
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})
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It("reads the Key Phase Bit", func() {
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data := []byte{
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0x40 ^ 0x4,
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0xde, 0xad, 0xbe, 0xef, 0xca, 0xfe, // connection ID
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}
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data = append(data, 11) // packet number
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hdr, err := ParseHeader(bytes.NewReader(data), 6)
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Expect(err).ToNot(HaveOccurred())
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Expect(hdr.IsLongHeader).To(BeFalse())
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b := bytes.NewReader(data)
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extHdr, err := hdr.ParseExtended(b, versionIETFFrames)
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Expect(err).ToNot(HaveOccurred())
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Expect(extHdr.KeyPhase).To(Equal(1))
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Expect(b.Len()).To(BeZero())
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})
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It("reads a header with a 2 byte packet number", func() {
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data := []byte{
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0x40 | 0x1,
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0xde, 0xad, 0xbe, 0xef, // connection ID
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}
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data = append(data, []byte{0x13, 0x37}...) // packet number
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hdr, err := ParseHeader(bytes.NewReader(data), 4)
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Expect(err).ToNot(HaveOccurred())
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b := bytes.NewReader(data)
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extHdr, err := hdr.ParseExtended(b, versionIETFFrames)
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Expect(err).ToNot(HaveOccurred())
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Expect(extHdr.IsLongHeader).To(BeFalse())
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Expect(extHdr.PacketNumber).To(Equal(protocol.PacketNumber(0x1337)))
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Expect(extHdr.PacketNumberLen).To(Equal(protocol.PacketNumberLen2))
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Expect(b.Len()).To(BeZero())
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})
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It("reads a header with a 3 byte packet number", func() {
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data := []byte{
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0x40 | 0x2,
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0xde, 0xad, 0xbe, 0xef, 0xca, 0xfe, 0x1, 0x2, 0x3, 0x4, // connection ID
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}
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data = append(data, []byte{0x99, 0xbe, 0xef}...) // packet number
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hdr, err := ParseHeader(bytes.NewReader(data), 10)
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Expect(err).ToNot(HaveOccurred())
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b := bytes.NewReader(data)
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extHdr, err := hdr.ParseExtended(b, versionIETFFrames)
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Expect(err).ToNot(HaveOccurred())
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Expect(extHdr.IsLongHeader).To(BeFalse())
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Expect(extHdr.PacketNumber).To(Equal(protocol.PacketNumber(0x99beef)))
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Expect(extHdr.PacketNumberLen).To(Equal(protocol.PacketNumberLen3))
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Expect(b.Len()).To(BeZero())
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})
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It("errors on EOF, when parsing the header", func() {
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data := []byte{
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0x40 ^ 0x2,
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0xde, 0xad, 0xbe, 0xef, 0xca, 0xfe, 0x13, 0x37, // connection ID
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}
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for i := 0; i < len(data); i++ {
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data = data[:i]
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_, err := ParseHeader(bytes.NewReader(data), 8)
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Expect(err).To(Equal(io.EOF))
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}
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})
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It("errors on EOF, when parsing the extended header", func() {
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data := []byte{
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0x40 ^ 0x3,
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0xde, 0xad, 0xbe, 0xef, 0xca, 0xfe, // connection ID
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}
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hdrLen := len(data)
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data = append(data, []byte{0xde, 0xad, 0xbe, 0xef}...) // packet number
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for i := hdrLen; i < len(data); i++ {
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data = data[:i]
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hdr, err := ParseHeader(bytes.NewReader(data), 6)
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Expect(err).ToNot(HaveOccurred())
|
|
_, err = hdr.ParseExtended(bytes.NewReader(data), versionIETFFrames)
|
|
Expect(err).To(Equal(io.EOF))
|
|
}
|
|
})
|
|
})
|
|
})
|