ALPN identifiers from the ALPN spec have been defined in the context of negotiating the application protocol in TLS. In this context, they imply a layering above TLS.
When used outside this context, there is an ambiguity, mainly for the http/1.1 token: does it refer to HTTP/1.1 over TLS, or can it refer also to HTTP/1.1 over TCP?
The draft should resolve this ambiguity by stating that the http/1.1 identifier is used to identify HTTP/1.1 over TLS.
In addition, a new identifier, h1c for example, could be defined to identify HTTP/1.1 over cleartext TCP, in order to allow using Alt-Svc to be used to target an HTTP/1.1 server over cleartext TCP.
ALPN identifiers from the ALPN spec have been defined in the context of negotiating the application protocol in TLS. In this context, they imply a layering above TLS.
When used outside this context, there is an ambiguity, mainly for the http/1.1 token: does it refer to HTTP/1.1 over TLS, or can it refer also to HTTP/1.1 over TCP?
The draft should resolve this ambiguity by stating that the http/1.1 identifier is used to identify HTTP/1.1 over TLS.
In addition, a new identifier, h1c for example, could be defined to identify HTTP/1.1 over cleartext TCP, in order to allow using Alt-Svc to be used to target an HTTP/1.1 server over cleartext TCP.