Server Frames

The six frame types a server sends: authorization, response, response finish, channel request, channel response, and channel response finish.

A server sends six frame types.

• Type 0 — authorization. The scope and channel fields are ignored. The payload is a credential. Sent only when the server is the connection’s initiator, only as the connection’s first frame — see Authorization.
• Type 2 — response. One piece of the answer to a scope’s request. The scope field names the scope; the channel field is ignored. The payload is the piece.
• Type 3 — response finish. Ends a scope. The scope field names it; the channel field is ignored; there is no payload. It is the only way a scope ends.
• Type 4 — channel request. Opens a channel within an existing scope. The scope field names that scope; the channel field carries a number of the server’s choosing. The payload is the channel’s one request.
• Type 5 — channel response. Answers a channel the client opened, quoting the client’s channel number. The payload is one piece of the answer.
• Type 6 — channel response finish. Ends a channel the client opened, quoting its number. It carries no payload, and it is the only way such a channel ends.