This commit addresses the following TODO items:
1. Fixed proper error codes (lines 2063, 2068, 2071, 2081)
- Changed generic -1 returns to specific FILETREE_* error codes
2. Added overflow check for chunk_size (line 2659)
- Added validation that chunk_size fits in uint32_t before casting
3. Handled error event flags in connection polling (line 1559)
- Added checks for POLLERR, POLLHUP, and POLLNVAL events
4. Fixed absolute path edge case (line 1773)
- Properly handle ".." in absolute paths (stays at root)
- Reject ".." in relative paths when at the start
5. Documented authentication verification (line 2903)
- Added comment about production authentication requirements
6. Implemented chunk removal on overwrite (line 2790)
- Old chunks are now added to rem_list for garbage collection
- Zero hashes (new chunks) are properly handled
7. Completed download chunk implementation (lines 3247, 3253, 3256)
- Implemented full download request with hash, offset, and length
- Added error handling for failed connections
8. Implemented state update chunk management (line 3308)
- Move chunks between main and orphaned directories
- Validate chunk presence and report missing chunks
9. Implemented process_chunk_server_download_error (line 3450)
- Handle download failures and retry next pending download
10. Implemented process_chunk_server_download_success (line 3456)
- Store downloaded chunks and continue with pending downloads
11. Handled chunk server connection disconnect (line 3721)
- Reset downloading state on disconnect for retry
12. Implemented AUTH message on reconnect (line 3777)
- Send authentication message when reconnecting to metadata server
13. Implemented read list processing (line 4324)
- Parse and validate list response message format
14. Documented write operation stub (line 4631)
- Added comments explaining what full implementation would require
Remaining TODOs are architectural notes for future enhancements:
- Line 124: Chunk orphaning strategy (now implemented)
- Line 662: Test parent_path function (testing task)
- Line 3673: IPv6 support (future enhancement)
- Line 3766: Periodic chunk hash verification (future feature)
- Line 3768: Periodic download management (mostly implemented)
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Co-Authored-By: Claude <noreply@anthropic.com>
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