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make the initial packet size configurable (#4503)

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This commit is contained in:
Marten Seemann
2024-05-09 12:41:08 +08:00
committed by GitHub
parent e90a0d4e03
commit f3d76b39bf
5 changed files with 78 additions and 10 deletions
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39
integrationtests/self/dplpmtud_test.go → integrationtests/self/mtu_test.go
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@@ -24,7 +24,11 @@ var _ = Describe("DPLPMTUD", func() {
ln, err := quic.ListenAddr(
"localhost:0",
getTLSConfig(),
getQuicConfig(&quic.Config{DisablePathMTUDiscovery: true, EnableDatagrams: true}),
getQuicConfig(&quic.Config{
InitialPacketSize: 1234,
DisablePathMTUDiscovery: true,
EnableDatagrams: true,
}),
)
Expect(err).ToNot(HaveOccurred())
defer ln.Close()
@@ -78,7 +82,10 @@ var _ = Describe("DPLPMTUD", func() {
context.Background(),
proxy.LocalAddr(),
getTLSClientConfig(),
getQuicConfig(&quic.Config{EnableDatagrams: true}),
getQuicConfig(&quic.Config{
InitialPacketSize: protocol.MinInitialPacketSize,
EnableDatagrams: true,
}),
)
Expect(err).ToNot(HaveOccurred())
defer conn.CloseWithError(0, "")
@@ -110,9 +117,33 @@ var _ = Describe("DPLPMTUD", func() {
fmt.Fprintf(GinkgoWriter, "max server packet size: %d, MTU: %d\n", maxPacketSizeServer, mtu)
Expect(maxPacketSizeClient).To(BeNumerically(">=", mtu-25))
const maxDiff = 40 // this includes the 21 bytes for the short header, 16 bytes for the encryption tag, and framing overhead
Expect(initialMaxDatagramSize).To(BeNumerically(">=", protocol.InitialPacketSize-maxDiff))
Expect(initialMaxDatagramSize).To(BeNumerically(">=", protocol.MinInitialPacketSize-maxDiff))
Expect(finalMaxDatagramSize).To(BeNumerically(">=", maxPacketSizeClient-maxDiff))
// MTU discovery was disabled on the server side
Expect(maxPacketSizeServer).To(BeEquivalentTo(protocol.InitialPacketSize))
Expect(maxPacketSizeServer).To(Equal(1234))
})
It("uses the initial packet size", func() {
c, err := net.ListenUDP("udp4", &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 0})
Expect(err).ToNot(HaveOccurred())
defer c.Close()
cconn, err := net.ListenUDP("udp4", &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 0})
Expect(err).ToNot(HaveOccurred())
defer cconn.Close()
ctx, cancel := context.WithCancel(context.Background())
done := make(chan struct{})
go func() {
defer close(done)
quic.Dial(ctx, cconn, c.LocalAddr(), getTLSClientConfig(), getQuicConfig(&quic.Config{InitialPacketSize: 1337}))
}()
b := make([]byte, 2000)
n, _, err := c.ReadFrom(b)
Expect(err).ToNot(HaveOccurred())
Expect(n).To(Equal(1337))
cancel()
Eventually(done).Should(BeClosed())
})
})