forked from quic-go/quic-go
f12ee48617
* wire: add benchmarks for the frame parser * wire: use quicvarint.Parse when parsing frames * wire: always use io.EOF for too short frames
111 lines
3.4 KiB
Go
111 lines
3.4 KiB
Go
package wire
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import (
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"fmt"
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"io"
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"github.com/quic-go/quic-go/internal/protocol"
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"github.com/quic-go/quic-go/quicvarint"
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. "github.com/onsi/ginkgo/v2"
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. "github.com/onsi/gomega"
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)
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var _ = Describe("MAX_STREAMS frame", func() {
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Context("parsing", func() {
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It("accepts a frame for a bidirectional stream", func() {
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data := encodeVarInt(0xdecaf)
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f, l, err := parseMaxStreamsFrame(data, bidiMaxStreamsFrameType, protocol.Version1)
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Expect(err).ToNot(HaveOccurred())
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Expect(f.Type).To(Equal(protocol.StreamTypeBidi))
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Expect(f.MaxStreamNum).To(BeEquivalentTo(0xdecaf))
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Expect(l).To(Equal(len(data)))
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})
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It("accepts a frame for a bidirectional stream", func() {
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data := encodeVarInt(0xdecaf)
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f, l, err := parseMaxStreamsFrame(data, uniMaxStreamsFrameType, protocol.Version1)
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Expect(err).ToNot(HaveOccurred())
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Expect(f.Type).To(Equal(protocol.StreamTypeUni))
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Expect(f.MaxStreamNum).To(BeEquivalentTo(0xdecaf))
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Expect(l).To(Equal(len(data)))
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})
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It("errors on EOFs", func() {
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const typ = 0x1d
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data := encodeVarInt(0xdeadbeefcafe13)
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_, l, err := parseMaxStreamsFrame(data, typ, protocol.Version1)
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Expect(err).NotTo(HaveOccurred())
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Expect(l).To(Equal(len(data)))
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for i := range data {
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_, _, err := parseMaxStreamsFrame(data[:i], typ, protocol.Version1)
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Expect(err).To(MatchError(io.EOF))
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}
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})
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for _, t := range []protocol.StreamType{protocol.StreamTypeUni, protocol.StreamTypeBidi} {
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streamType := t
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It("accepts a frame containing the maximum stream count", func() {
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f := &MaxStreamsFrame{
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Type: streamType,
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MaxStreamNum: protocol.MaxStreamCount,
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}
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b, err := f.Append(nil, protocol.Version1)
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Expect(err).ToNot(HaveOccurred())
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typ, l, err := quicvarint.Parse(b)
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Expect(err).ToNot(HaveOccurred())
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b = b[l:]
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frame, _, err := parseMaxStreamsFrame(b, typ, protocol.Version1)
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Expect(err).ToNot(HaveOccurred())
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Expect(frame).To(Equal(f))
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})
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It("errors when receiving a too large stream count", func() {
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f := &MaxStreamsFrame{
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Type: streamType,
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MaxStreamNum: protocol.MaxStreamCount + 1,
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}
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b, err := f.Append(nil, protocol.Version1)
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Expect(err).ToNot(HaveOccurred())
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typ, l, err := quicvarint.Parse(b)
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Expect(err).ToNot(HaveOccurred())
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b = b[l:]
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_, _, err = parseMaxStreamsFrame(b, typ, protocol.Version1)
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Expect(err).To(MatchError(fmt.Sprintf("%d exceeds the maximum stream count", protocol.MaxStreamCount+1)))
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})
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}
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})
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Context("writing", func() {
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It("for a bidirectional stream", func() {
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f := &MaxStreamsFrame{
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Type: protocol.StreamTypeBidi,
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MaxStreamNum: 0xdeadbeef,
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}
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b, err := f.Append(nil, protocol.Version1)
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Expect(err).ToNot(HaveOccurred())
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expected := []byte{bidiMaxStreamsFrameType}
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expected = append(expected, encodeVarInt(0xdeadbeef)...)
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Expect(b).To(Equal(expected))
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})
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It("for a unidirectional stream", func() {
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f := &MaxStreamsFrame{
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Type: protocol.StreamTypeUni,
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MaxStreamNum: 0xdecafbad,
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}
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b, err := f.Append(nil, protocol.Version1)
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Expect(err).ToNot(HaveOccurred())
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expected := []byte{uniMaxStreamsFrameType}
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expected = append(expected, encodeVarInt(0xdecafbad)...)
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Expect(b).To(Equal(expected))
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})
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It("has the correct length", func() {
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frame := MaxStreamsFrame{MaxStreamNum: 0x1337}
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Expect(frame.Length(protocol.Version1)).To(BeEquivalentTo(1 + quicvarint.Len(0x1337)))
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})
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})
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})
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