Add DTLS1.2 filter rule
Achim Kraus
In order to protect CoAP/DTLS Connection ID traffic state of the art, please add some simple rules to filter DTLS 1.2 Connection ID records. That could be easily done by filter on the first 3 bytes.
DTLS 1.2 header first 3 bytes "14 fe fd" (CCS, 1.2)
"15 fe fd" (Alert, 1.2)
"16 fe fd" (Handshake, 1.2)
"17 fe fd" (Application Data, 1.2)
"19 fe fd" (tls_cid, 1.2)
And DTLS 1.0 header for HelloVerifyRequest
"16 fe ff" (Handshake, 1.0)