fix: handle partial WLAN transfers and closed connections - #294
Shubham-Padkonde wants to merge 2 commits into
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Reviewer's GuideCorrects WLANHandler transfer accounting for partial socket sends and raises ConnectionError on EOF or zero-byte sends, with mock- and socket-pair-based regression tests covering normal, empty, partial, and disconnected transfers. Sequence diagram for partial WLAN write handlingsequenceDiagram
participant Caller
participant WLANHandler
participant Socket
Caller->>WLANHandler: write(data)
loop while bytes remain
WLANHandler->>Socket: send(chunk)
Socket-->>WLANHandler: count
WLANHandler->>WLANHandler: update sent and remaining by count
end
WLANHandler-->>Caller: return sent
Sequence diagram for WLAN connection closure during transfersequenceDiagram
participant Caller
participant WLANHandler
participant Socket
alt read encounters EOF
Caller->>WLANHandler: read(numbytes)
WLANHandler->>Socket: recv(requested bytes)
Socket-->>WLANHandler: empty bytes
WLANHandler-->>Caller: raise ConnectionError
else write encounters zero-byte send
Caller->>WLANHandler: write(data)
WLANHandler->>Socket: send(chunk)
Socket-->>WLANHandler: 0
WLANHandler-->>Caller: raise ConnectionError
end
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Navigate logical layers of code changes, visualize relationships, and explore their blast radius. No actionable comments were generated in the recent review. 🎉 ℹ️ Recent review info⚙️ Run configurationConfiguration used: defaults Review profile: CHILL Plan: Advanced Run ID: 📒 Files selected for processing (1)
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Included review availability: This review used your included allowance. Your plan provides up to 4 included reviews per hour; 3 remain after this review. 📝 WalkthroughWalkthroughWLANHandler now raises ChangesWLAN transfer handling
Priority: ⚪ Not assessed Estimated code review effort: 2 (Simple) | ~10 minutes Change: Bug fix Merge Risk: ⚪ Minimal · up to No remaining issue was identified that should delay merging the WLAN transfer change. Security Architecture ReviewSecurity architecture risk: 🔵 Low · up to The change improves transfer completion and failure reporting without showing a new access path or weaker boundary. Recovery after a partially completed command remains a consideration, and device behavior has not been validated on physical hardware. Retained concerns Security review detailsSecurity Blast Radius
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Inline comments:
Review comments at @tests/test_wlan.py:
- Line 65: Update the assertion using peer.recv so it accumulates data until all
seven bytes have arrived, then compare the complete result with the expected
request value.
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pslab/connection/wlan.pytests/test_wlan.py
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WLANHandler.writesubtracts the requested chunk length fromremaining, even whensocket.sendaccepts fewer bytes. A 10-byte payload accepted three bytes at a time therefore returns after sending only three bytes. Count the bytes actually accepted, and keep sending the remainder.Also raise
ConnectionErrorwhenrecvreturns EOF orsendreturns zero. Reads previously looped indefinitely after peer disconnection, and zero-byte writes returned an incomplete transfer as if it had completed. Both methods document the exception.Adds hardware-independent regression coverage for small and multi-chunk partial sends, EOF before/during a read, zero-byte sends, empty transfers, and both directions of a real socket-pair transfer. This addresses separate cases from the chunk-slicing correction in #246.
Validation on Windows/Python 3.13:
tests/test_wlan.pyandtests/test_pico_scpi_transport.py); five new cases fail before the fix.Prepared with OpenAI Codex assistance.
Summary by Sourcery
Ensure WLAN transfers correctly handle partial progress and disconnected sockets.
Bug Fixes:
Enhancements:
Tests:
Summary by CodeRabbit