[IPFIX] TCP flags?
Paul Aitken <[email protected]>
| Newsgroups | gmane.ietf.ipfix |
|---|---|
| Message-ID | <[email protected]> |
Dear IPFIX experts,
IANA's IPFIX registry defines field #6, tcpControlBits, as an unsigned8
flags following RFC793:
0 1 2 3 4 5 6 7
+-----+-----+-----+-----+-----+-----+-----+-----+
| Reserved | URG | ACK | PSH | RST | SYN | FIN |
+-----+-----+-----+-----+-----+-----+-----+-----+
This is missing the ECE and CWR bits from (Std) RFC 3168, and ECN Nonce
Sum (NS) bit from (Exp) RFC 3540.
Per RFC3540, the TCP flags field is like so:
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
| | | N | C | E | U | A | P | R | S | F |
| Header Length | Reserved | S | W | C | R | C | S | S | Y | I |
| | | | R | E | G | K | H | T | N | N |
+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
- where bits 7, 8, and 9 aren't defined in IPFIX.
Q1: can we updated tcpControlBits to include the ECE and CWR bits from
RFC 3168?
Q2: how should the ECN Nonce Sum be reported?
Thanks,
P.
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