The packet tracer resolved 'self' to the v4 overlay address
unconditionally, causing "mixed address families" errors when tracing
v6 traffic. Pick the self address matching the peer's address family.
Add Engine.GetWgV6Addr() and rework parseAddress into
resolveTraceAddresses which parses the non-self address first to
determine the family, then resolves self accordingly.
adds NetFlow functionality to track and log network traffic information between peers, with features including:
- Flow logging for TCP, UDP, and ICMP traffic
- Integration with connection tracking system
- Resource ID tracking in NetFlow events
- DNS and exit node collection configuration
- Flow API and Redis cache in management
- Memory-based flow storage implementation
- Kernel conntrack counters and userspace counters
- TCP state machine improvements for more accurate tracking
- Migration from net.IP to netip.Addr in the userspace firewall
