Crate zerodds_opcua_uacp 

OPC-UA Connection Protocol (UACP, OPC Foundation Part 6 §7.1) — the opc.tcp:// binary message framing that carries OPC-UA Client/Server traffic.

Crate zerodds-opcua-uacp. Safety classification: STANDARD. Spec: OPC-UA Part 6 — Mappings §7.1 (Connection Protocol).

Scope and relationship to the rest of the OPC-UA stack

This is the wire foundation for a native OPC-UA Client/Server stack (the request/response counterpart to the native UADP PubSub stack in zerodds-opcua-pubsub). The layers build up:

1. UACP (this crate) — the TCP message framing: every message starts with an 8-byte header (MessageType + ChunkType + MessageSize), then a body. The connection-setup messages — Hello / Acknowledge / Error / ReverseHello — are handled here in full.
2. SecureChannel (OPN/CLO/MSG messages + symmetric/asymmetric crypto) — next.
3. Session + Service dispatch (Part 4) over the SecureChannel.
4. Server (serving the zerodds-opcua-gateway AddressSpace + the zerodds-opcua-pubsub Information Model) and Client.

The OPC-UA Part 6 §5 binary encoding is reused from zerodds_opcua_pubsub::binary (UaReader/UaWriter).

Re-exports

pub use connection::AcknowledgeMessage;

pub use connection::ChunkType;

pub use connection::ErrorMessage;

pub use connection::HelloMessage;

pub use connection::MessageHeader;

pub use connection::MessageType;

pub use connection::ReverseHelloMessage;

pub use securechannel::AsymmetricAlgorithmSecurityHeader;

pub use securechannel::ChannelSecurityToken;

pub use securechannel::OpenSecureChannelRequest;

pub use securechannel::OpenSecureChannelResponse;

pub use securechannel::ParsedChunk;

pub use securechannel::RequestHeader;

pub use securechannel::ResponseHeader;

pub use securechannel::SecureChannel;

pub use securechannel::SequenceHeader;

pub use securechannel::parse_chunk;

Modules

connection

UACP connection-setup messages (OPC-UA Part 6 §7.1.2): the message header plus Hello / Acknowledge / Error / ReverseHello.

securechannel

OPC-UA SecureChannel (Part 6 §6.7) on top of the UACP framing — the OPN / MSG / CLO message chunks, their security/sequence headers, the common service RequestHeader/ResponseHeader, and the OpenSecureChannel service.

Structs

UaReader

Cursor-based little-endian byte reader over a borrowed slice.

UaWriter

Append-only little-endian byte writer backed by a growable Vec.

Enums

DecodeError

Error while decoding an OPC-UA / UADP value.

EncodeError

Error while encoding an OPC-UA / UADP value.