Assemble fragmented emulated frames across arbitrary read boundaries
A single frame split across reads is discarded as malformed. Maintain incremental parser state.
- Focused work estimate
- 3h + prerequisites
- Priority in the scenario
- High
- Engineering practice
- Streaming · State machines
Estimated field mix
- Embedded and edge50%
- Networking50%
Field percentages are editorial estimates of the ticket's engineering focus. They total 100%; they are not measured time, proficiency scores, or ownership evidence.
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Project context
Fictional environmental-display devices send synthetic noncritical readings to a local gateway. Implement a byte-stream emulator; no physical device, radio, credentials or safety-critical control is involved.
Setup prerequisites
- Specify a small frame format with length sequence payload and checksum.
- Generate local byte streams with fragmentation corruption and reconnects.
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
Acceptance criteria
- Every legal split yields same frame
- Multiple frames in one read decode
- Incomplete suffix remains bounded
Implementation constraints
- Transport read boundaries are not message boundaries.
Verification to include
- Test every split of small frame
- Feed partial header then disconnect
Deliverables
- Streaming decoder and split cases
Rollout and recovery
Buffer only up to the declared frame limit.
Value of the work
For the engineer: Practice incremental parsing, fixed resource limits and protocol recovery.
For the team: Inspect whether a device adapter survives malformed input without corrupting accepted readings.
Evidence boundaries
Outcome Evidence: Tests, patches, and runbooks are requested deliverables. They become Outcome Evidence only through a qualified Mission and immutable Evidence IDs.
Ownership Evidence: Independent adaptation must be observed under a declared verification policy and cite immutable Evidence IDs. Completing a planning ticket establishes no Ownership Evidence.