c5345e3034
There are peculiar ways status-report should be interpreted in various contexts. Easier to manage this within the Data Model.
95 lines
2.6 KiB
Rust
95 lines
2.6 KiB
Rust
/*
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*
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* Copyright (c) 2020-2022 Project CHIP Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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use boxslab::BoxSlab;
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use crate::error::*;
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use super::exchange::ExchangeCtx;
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use super::packet::PacketPool;
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const MAX_PROTOCOLS: usize = 4;
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#[derive(PartialEq, Debug)]
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pub enum ResponseRequired {
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Yes,
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No,
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}
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pub struct ProtoDemux {
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proto_id_handlers: [Option<Box<dyn HandleProto>>; MAX_PROTOCOLS],
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}
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/// This is the context in which a receive packet is being processed
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pub struct ProtoCtx<'a> {
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/// This is the exchange context, that includes the exchange and the session
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pub exch_ctx: ExchangeCtx<'a>,
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/// This is the received buffer for this transaction
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pub rx: BoxSlab<PacketPool>,
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/// This is the transmit buffer for this transaction
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pub tx: BoxSlab<PacketPool>,
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}
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impl<'a> ProtoCtx<'a> {
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pub fn new(
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exch_ctx: ExchangeCtx<'a>,
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rx: BoxSlab<PacketPool>,
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tx: BoxSlab<PacketPool>,
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) -> Self {
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Self { exch_ctx, rx, tx }
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}
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}
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pub trait HandleProto {
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fn handle_proto_id(&mut self, proto_ctx: &mut ProtoCtx) -> Result<ResponseRequired, Error>;
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fn get_proto_id(&self) -> usize;
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fn handle_session_event(&self) -> Result<(), Error> {
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Ok(())
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}
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}
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impl Default for ProtoDemux {
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fn default() -> Self {
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Self::new()
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}
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}
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impl ProtoDemux {
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pub fn new() -> ProtoDemux {
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ProtoDemux {
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proto_id_handlers: [None, None, None, None],
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}
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}
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pub fn register(&mut self, proto_id_handle: Box<dyn HandleProto>) -> Result<(), Error> {
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let proto_id = proto_id_handle.get_proto_id();
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self.proto_id_handlers[proto_id] = Some(proto_id_handle);
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Ok(())
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}
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pub fn handle(&mut self, proto_ctx: &mut ProtoCtx) -> Result<ResponseRequired, Error> {
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let proto_id = proto_ctx.rx.get_proto_id() as usize;
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if proto_id >= MAX_PROTOCOLS {
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return Err(Error::Invalid);
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}
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return self.proto_id_handlers[proto_id]
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.as_mut()
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.ok_or(Error::NoHandler)?
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.handle_proto_id(proto_ctx);
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}
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}
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