[PATCH v3 1/2] enumerate supported VPN protocols via openconnect_get_supported_protocols()

[David Woodhouse]

On Wed, 2017-01-11 at 11:50 -0800, Daniel Lenski wrote:
> 
> Add a new public function, openconnect_get_supported_protocols(),
> which
> returns a list of protocols supported by the client.  Each supported
> protocol has a short name (as accepted by the --protocol command-line
> option), description, and list of flags; currently, the only flags
> are:
> 
>   * OPENCONNECT_PROTO_TCP (TCP transport supported)
>   * OPENCONNECT_PROTO_UDP (UDP transport supported)

Hm, does the caller really care about those? What might make more sense
is a set of flags indicating which authentication features are
meaningful for each protocol — can it support certificate auth, can it
support OTP, can it support CSD, etc.

Tools like the NetworkManager configuration UI would then disable
certain options depending on the protocol that's selected.
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