[TLS] TLSFlags ambiguity

[Jonathan Hoyland <[e-mail]>]

Hi TLSWG,

I'm working on implementing the TLS Flags extension
<https://datatracker.ietf.org/doc/html/draft-ietf-tls-tlsflags-12>, and I
just wanted to clarify a potential ambiguity in the spec.

In Section 2 the spec says:
Such documents will have to define which bit to set to show support, and
the order of the bits within the bit string shall be enumerated in network
order: bit zero is the high-order bit of the first octet as the flags field
is transmitted.

And also gives the example for encoding bit zero:
For example, if we want to encode only flag number zero, the FlagExtension
field will be 1 octet long, that is encoded as follows:

   00000001

In which it seems that the low-order bit of the first octet represents zero.

I have no preference either way, but when transmitted on the wire,
should flag 0 be transmitted as

0x01 or 0x80?

Regards,

Jonathan