Crate zerodds_coap_bridge 

Crate zerodds-coap-bridge. Safety classification: STANDARD.

CoAP (RFC 7252) wire codec + reliability + discovery + bridge — pure Rust no_std + alloc, forbid(unsafe_code). Beyond the bare wire codec it also implements all the accompanying CoAP layers: reliability/congestion control (§4.2-§4.7), request/response matching (§5.3), block-wise transfer (RFC 7959), resource discovery in CoRE-Link format (RFC 6690), observe registry (RFC 7641), multicast discovery, caching/proxying (§5.6 + §5.7), DTLS mode marker (§9), and a bidirectional CoAP↔DDS topic bridge.

Spec references:

• RFC 7252 — CoAP (Constrained Application Protocol).
• RFC 7641 — Observing Resources in CoAP.
• RFC 7959 — Block-Wise Transfer.
• RFC 6690 — CoRE-Link-Format.

Layer position

Layer 5 — bridges. Substrate for DDS↔IoT endpoint mapping (constrained devices, OPC-UA-PubSub mapping, ROS-2-on-constrained bridges).

Public API (as of 1.0.0-rc.1)

• CoapMessage / CoapCode / MessageType — message model (§3 + §12.1).
• encode / decode / CodecError — wire codec.
• CoapOption / OptionNumber / OptionValue — options with delta encoding + extended length (§3.1, §5.10).
• BlockOption / BlockValue / BlockReassembler / BlockError — block-wise transfer (RFC 7959).
• CoreLink / encode_links / decode_links — resource discovery (RFC 6690).
• OBSERVE_OPTION_NUMBER / ObserveRegistry / ObserverEntry — RFC 7641 observer state.
• PendingConfirmable / ReliabilityTracker / TickOutput / ACK_TIMEOUT_MS / MAX_RETRANSMIT — reliability §4.
• CoapDdsBridge / BridgeOp / BridgeError / map_method / parse_dds_path — CoAP↔DDS topic mapping.

Example

use zerodds_coap_bridge::{decode, encode, CoapCode, CoapMessage, MessageType};

let msg = CoapMessage {
    version: 1,
    message_type: MessageType::Confirmable,
    token: Vec::new(),
    code: CoapCode::GET,
    message_id: 0xBEEF,
    options: Vec::new(),
    payload: Vec::new(),
};

let wire = encode(&msg).expect("encode");
let decoded = decode(&wire).expect("decode");
assert_eq!(decoded.code, CoapCode::GET);

Re-exports

pub use blockwise::BlockError;

pub use blockwise::BlockOption;

pub use blockwise::BlockReassembler;

pub use blockwise::BlockValue;

pub use bridge::BridgeError;

pub use bridge::BridgeOp;

pub use bridge::CoapDdsBridge;

pub use bridge::map_method;

pub use bridge::parse_dds_path;

pub use codec::CodecError;

pub use codec::decode;

pub use codec::encode;

pub use core_link::CoreLink;

pub use core_link::decode_links;

pub use core_link::encode_links;

pub use message::CoapCode;

pub use message::CoapMessage;

pub use message::MessageType;

pub use observe::OBSERVE_OPTION_NUMBER;

pub use observe::ObserveRegistry;

pub use observe::ObserverEntry;

pub use option::CoapOption;

pub use option::OptionNumber;

pub use option::OptionValue;

pub use reliability::ACK_TIMEOUT_MS;

pub use reliability::MAX_RETRANSMIT;

pub use reliability::PendingConfirmable;

pub use reliability::ReliabilityTracker;

pub use reliability::TickOutput;

Modules

blockwise

Block-Wise Transfer — RFC 7959.

bridge

CoAP↔DDS topic bridge.

caching_proxy

CoAP caching + proxying per RFC 7252 §2.3 / §5.6 / §5.7 + HTTP cross-protocol mapping per RFC 7252 §10.

codec

CoAP wire codec — RFC 7252 §3 + §3.1.

core_link

CoRE-Link-Format — RFC 6690.

daemon

zerodds-coap-bridged daemon implementation.

dtls

CoAP DTLS mode per RFC 7252 §9.

matching

Request/response matching per RFC 7252 §5.3.

message

CoAP message model — RFC 7252 §3 + §12.1.

method_props

Method properties (idempotency / safety) per RFC 7252 §5.8.

multicast

CoAP multicast operation per RFC 7252 §8.

observe

Observe pattern — RFC 7641.

option

CoAP option model — RFC 7252 §3.1, §5.10 + RFC 7641 §2.

reliability

CoAP reliability — RFC 7252 §4.2-§4.7.

uri

CoAP URI scheme parser per RFC 7252 §6.