class Matter::Transport::Exchange

• Matter::Transport::Exchange
• Reference
• Object

Overview

Represents a message exchange (request/response pair)

In Matter protocol, exchanges are bidirectional conversations identified by an exchange ID. Each exchange tracks:

• Exchange ID
• Protocol ID
• Whether we initiated the exchange
• Pending acknowledgments
• Retransmission state

Defined in:

matter/transport/exchange.cr

Constant Summary

MRP_BACKOFF_BASE = 1.6

MRP_BASE_TIMEOUT = 200

Retransmission parameters (from Matter spec)

MRP_MAX_RETRIES = 5

MRP_STANDALONE_ACK_MS = 200

Constructors

• .new(exchange_id : UInt16, protocol_id : UInt16, session_id : UInt16, initiator : Bool, peer_address : Socket::IPAddress | Nil = nil, peer_node_id : DataType::NodeId | Nil = nil)

Instance Method Summary

• #clear_pending_message : Nil

  Clear pending message (successful acknowledgment received)

• #close : Nil

  Mark exchange as closed

• #exchange_id : UInt16
• #fail : Nil

  Mark exchange as failed

• #initiator? : Bool
• #needs_retransmit? : Codec::MessageCodec::Message | Nil

  Check if message needs retransmission Returns the message to retransmit, or nil if none needed

• #peer_address : Socket::IPAddress | Nil
• #peer_node_id : DataType::NodeId | Nil
• #protocol_id : UInt16
• #session_id : UInt16
• #set_pending_message(message : Codec::MessageCodec::Message) : Nil

  Store message for retransmission if needed

• #state : State
• #timed_out? : Bool

  Check if exchange has timed out

• #touch : Nil

  Update activity timestamp

Constructor Detail

Instance Method Detail