mirror of
https://github.com/refraction-networking/uquic.git
synced 2025-04-04 12:47:36 +03:00
83 lines
3.3 KiB
Go
83 lines
3.3 KiB
Go
package wire
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import (
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"bytes"
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"encoding/binary"
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"github.com/lucas-clemente/quic-go/internal/protocol"
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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("Version Negotiation Packets", func() {
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It("parses a Version Negotiation packet", 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 := []byte{0x80, 0, 0, 0, 0}
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data = append(data, uint8(len(destConnID)))
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data = append(data, destConnID...)
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data = append(data, uint8(len(srcConnID)))
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data = append(data, srcConnID...)
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for _, v := range versions {
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data = append(data, []byte{0, 0, 0, 0}...)
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binary.BigEndian.PutUint32(data[len(data)-4:], uint32(v))
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}
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Expect(IsVersionNegotiationPacket(data)).To(BeTrue())
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hdr, supportedVersions, err := ParseVersionNegotiationPacket(bytes.NewReader(data))
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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.Version).To(BeZero())
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Expect(supportedVersions).To(Equal(versions))
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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 := ComposeVersionNegotiation(connID, connID, versions)
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_, _, err := ParseVersionNegotiationPacket(bytes.NewReader(data[:len(data)-2]))
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Expect(err).To(MatchError("Version Negotiation packet has a version list with an invalid length"))
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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 := ComposeVersionNegotiation(connID, connID, versions)
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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 := ParseVersionNegotiationPacket(bytes.NewReader(data))
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Expect(err).To(MatchError("Version Negotiation packet has empty version list"))
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})
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It("adds a reserved version", func() {
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srcConnID := protocol.ConnectionID{0xde, 0xad, 0xbe, 0xef, 0xca, 0xfe, 0x13, 0x37}
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destConnID := protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8}
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versions := []protocol.VersionNumber{1001, 1003}
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data := ComposeVersionNegotiation(destConnID, srcConnID, versions)
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Expect(IsLongHeaderPacket(data[0])).To(BeTrue())
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hdr, supportedVersions, err := ParseVersionNegotiationPacket(bytes.NewReader(data))
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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.Version).To(BeZero())
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// the supported versions should include one reserved version number
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Expect(supportedVersions).To(HaveLen(len(versions) + 1))
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for _, v := range versions {
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Expect(supportedVersions).To(ContainElement(v))
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}
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var reservedVersion protocol.VersionNumber
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versionLoop:
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for _, ver := range supportedVersions {
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for _, v := range versions {
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if v == ver {
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continue versionLoop
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}
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}
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reservedVersion = ver
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}
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Expect(reservedVersion).ToNot(BeZero())
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Expect(reservedVersion&0x0f0f0f0f == 0x0a0a0a0a).To(BeTrue()) // check that it's a greased version number
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})
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})
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