Worked on the openssl/openssl repository to improve termination latency in the s_client tool by refining its shutdown logic. Addressed a bug where the TCP-specific drain workaround was unnecessarily applied to DTLS and QUIC datagram connections, causing avoidable delays. The solution involved modifying the shutdown process to ensure the half-close and select-based drain only executed for TCP streams, preserving intended TCP behavior while eliminating the 500 ms delay for non-TCP protocols. This change was implemented in C, leveraging expertise in networking, SSL/TLS, and systems programming, and was validated through the OpenSSL patch review process with multiple maintainer reviews.