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always use connection IDs longer than 8 bytes when sending a Retry

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A server is allowed to perform multiple Retries. There's little to gain
from doing so, but it's something our API allows. If a server performs
multiple Retries, it must use a connection ID that's at least 8 bytes
long. Only if it doesn't perform any further Retries it is allowed to
use shorter IDs. Therefore, we're on the safe side by always using a
long connection ID.
This shouldn't have a performance impact, since the server changes the
connection ID to a short value with the first Handshake packet it sends.
This commit is contained in:
Marten Seemann 2018-08-14 17:34:21 +07:00
parent 829edc04ab
commit 872e1747f4
6 changed files with 17 additions and 13 deletions
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1
server_tls_test.go
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@ -95,6 +95,7 @@ var _ = Describe("Stateless TLS handling", func() {
replyHdr := parseHeader(conn.dataWritten.Bytes())
Expect(replyHdr.Type).To(Equal(protocol.PacketTypeRetry))
Expect(replyHdr.SrcConnectionID).ToNot(Equal(hdr.DestConnectionID))
Expect(replyHdr.SrcConnectionID.Len()).To(BeNumerically(">=", protocol.MinConnectionIDLenInitial))
Expect(replyHdr.DestConnectionID).To(Equal(hdr.SrcConnectionID))
Expect(replyHdr.OrigDestConnectionID).To(Equal(hdr.DestConnectionID))
Expect(replyHdr.Token).ToNot(BeEmpty())