Worked on hardening UDP packet processing in the v2fly/v2ray-core repository, focusing on Shadowsocks protocol stability. Addressed a buffer overflow issue in UDP packet encoding by introducing dynamic buffer sizing logic that calculates the required space based on initialization vector length, destination length, payload size, and AEAD overhead. This approach used Go’s buf.NewWithSize to allocate buffers only when necessary, preventing encoding-time panics with large UDP payloads. The fix improved service reliability under high network traffic by reducing crash risk and incident rates. Emphasized code safety and maintainability, making future UDP-related changes more robust and easier to manage.