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fix: surface tshark stderr errors to LLM, not just log them

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YueGuobin 2026-05-12 15:10:27 +08:00
parent b79fea918d
commit 30a140a9e3
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1 changed files with 28 additions and 10 deletions
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38
gns3server/agent/gns3_copilot/tools_v2/packet_analysis_tool.py
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@ -442,19 +442,37 @@ class PacketAnalysisTool(BaseTool):
)
output = result.stdout
if result.stderr:
if "tshark:" in result.stderr.lower():
logger.warning(f"tshark stderr: {result.stderr}")
stderr = result.stderr.strip() if result.stderr else ""
# Surface tshark field/filter errors to the LLM
if stderr and "tshark:" in stderr.lower():
stderr_clean = stderr.replace("tshark: ", "")
hints = [
f"tshark reported: {stderr_clean}",
]
if "is not a valid protocol" in stderr.lower() or "aren't valid" in stderr.lower():
hints.append(
'Use {"action": "search_fields", "query": "<protocol>"} '
"to find correct field names."
)
logger.warning(f"tshark stderr: {stderr}")
return json.dumps({"error": "tshark argument error", "hints": hints})
if stderr:
logger.warning(f"tshark stderr: {stderr}")
if not output.strip():
hints = []
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"
hints.append(
"The -c flag limits total packets READ, not matched results. "
'Try removing -c and pipe to "head -N" instead.'
)
hints.append(
'Use {"action": "search_fields", "query": "<protocol>"} to '
"verify your display filter and field names are correct."
)
return json.dumps({"result": "No matching packets found", "hints": hints})
logger.info(f"tshark output: {len(output)} characters")
return output