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don't send stateless resets for small packets

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This prevents amplification and looping.
This commit is contained in:
Marten Seemann 2019-03-06 14:42:38 +09:00
parent 19cf46d736
commit 5c20519743
2 changed files with 12 additions and 0 deletions
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7
packet_handler_map_test.go
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@ -229,6 +229,13 @@ var _ = Describe("Packet Handler Map", func() {
Expect(reset.data[0] & 0x80).To(BeZero()) // short header packet
Expect(reset.data).To(HaveLen(protocol.MinStatelessResetSize))
})
It("doesn't send stateless resets for small packets", func() {
addr := &net.UDPAddr{IP: net.IPv4(192, 168, 0, 1), Port: 1337}
p := append([]byte{40}, make([]byte, protocol.MinStatelessResetSize-2)...)
handler.handlePacket(addr, getPacketBuffer(), p)
Consistently(conn.dataWritten).ShouldNot(Receive())
})
})
Context("running a server", func() {