只有hello包实现多跳，还没加入业务数据

具体的还要看opencode和gpt记录接着优化

sim/analysis_tools/reliability_analysis.py

@@ -0,0 +1,62 @@
+"""
+Reliability Analysis Tools.
+
+Functions for analyzing packet delivery reliability.
+"""
+
+from typing import Dict, Any
+
+
+def analyze_loss_breakdown(loss_data: Dict[str, int]) -> Dict[str, Any]:
+    """
+    Analyze packet loss breakdown.
+
+    Args:
+        loss_data: Dictionary with loss counts by type
+
+    Returns:
+        Dictionary with loss analysis
+    """
+    total_loss = sum(loss_data.values())
+
+    if total_loss == 0:
+        return {
+            "total_loss": 0,
+            "rates": {},
+            "primary_cause": "none",
+        }
+
+    rates = {k: round(v / total_loss * 100, 2) for k, v in loss_data.items() if v > 0}
+
+    # Find primary cause
+    primary_cause = (
+        max(loss_data.items(), key=lambda x: x[1])[0] if loss_data else "none"
+    )
+
+    return {
+        "total_loss": total_loss,
+        "rates": rates,
+        "primary_cause": primary_cause,
+    }
+
+
+def calculate_pdr_metrics(total_sent: int, total_received: int) -> Dict[str, Any]:
+    """
+    Calculate PDR metrics.
+
+    Args:
+        total_sent: Total packets sent
+        total_received: Total packets received
+
+    Returns:
+        Dictionary with PDR analysis
+    """
+    pdr = total_received / total_sent if total_sent > 0 else 0
+
+    return {
+        "total_sent": total_sent,
+        "total_received": total_received,
+        "pdr": round(pdr * 100, 2),
+        "delivered": total_received,
+        "lost": total_sent - total_received,
+    }