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fix: hint LLM about -c behavior when tshark returns empty with -c

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YueGuobin 2026-05-12 14:54:50 +08:00
parent 09b0fbcfea
commit b79fea918d
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1 changed files with 7 additions and 0 deletions
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7
gns3server/agent/gns3_copilot/tools_v2/packet_analysis_tool.py
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@ -447,6 +447,13 @@ class PacketAnalysisTool(BaseTool):
logger.warning(f"tshark stderr: {result.stderr}") logger.warning(f"tshark stderr: {result.stderr}")
if not output.strip(): if not output.strip():
if "-c" in tshark_args:
return json.dumps({
"error": "No matching packets found",
"hint": "The -c flag limits total packets READ, not matched results. "
"Try removing -c so tshark scans the entire capture file. "
'Use pipe to "head -N" to limit output instead.',
})
return "No matching packets found" return "No matching packets found"
logger.info(f"tshark output: {len(output)} characters") logger.info(f"tshark output: {len(output)} characters")