System & Network Software Engineer.

• LDP: fixed adjacency processing logic
  • Modified the adjacency lookup logic to include both the source IP and LSR ID. This prevents obsolete neighbor entries from persisting after a remote peer LSR ID change.
  • 🌐 View Patch in openbsd-tech mailing list
  • ⚙️ View Commit in OpenBSD source

• FIB: fixed fib_info hash collisions for IPv4 routes with MPLS labels
  • Identified a performance bottleneck in fib_info_hash where O(N) lookup complexity caused significant delays during large-scale MPLS route updates.
  • Proposed a .get_encap_hash callback for lwtunnel_encap_ops to include MPLS label sets in fib_info hash calculations.
  • Technical Outcome: Achieved a 400x speedup (from 6m to 0.8s for 100k routes); technical discussion confirmed the issue and established Nexthop API as the preferred architectural alternative.
  • 🌐 View Technical Discussion in netdev mailing list

• BGP: fixed dissector checks for labeled prefix parsing
  • Corrected BGP prefix length validation for SAFI 4, 128, 129, and 130 to resolve default route display issues, integrating it with RD-aware checks.
  • ⚙️ View Commit in Wireshark
  • ⚙️ View Commit in Wireshark mirror

• PIM: fixed stack overflow and implemented IGMPv3 query fragmentation
  • Fixed a critical CWE-121 vulnerability that caused daemon crashes (Remote DoS) due to stack buffer overflows when processing large source lists.
  • Migrated from VLA/stack to heap-allocated buffers to ensure memory safety.
  • Implemented IGMPv3 query fragmentation based on interface MTU to prevent packet size violations.
  • Added comprehensive topotests to verify IGMPv3 fragmentation and system stability under high-load scenarios.
  • 🌐 View Pull Request
  • ⚙️ View Commits