Module bt_message_handler 

BT Message Handler - Block request and receive logic

This module handles the low-level BitTorrent protocol message processing for block requests and data reception during piece download.

Extracted from bt_download_command.rs to improve modularity and follow the single responsibility principle.

Architecture Reference

Based on original aria2 C++ structure:

• src/BtMessageDispatcher.h - Message dispatching
• src/PeerInteractionCommand.h - Peer interaction

Structs

BlockDownloadResult

Result of a block download attempt

BtMessageHandler

BT Message Handler for block-level operations

Constants

BLOCK_REQUEST_TIMEOUT_SECS

Timeout for each block request (seconds)

BLOCK_SIZE

Block size for each piece block request (16 KB)

MAX_BLOCK_READ_MESSAGES

Maximum messages to read while waiting for a specific block

MAX_RETRIES

Maximum number of retries for a failed piece download