Service Affinity Solution based on Transport Layer Security (TLS)

This draft proposes a service affinity solution between client and server based on Transport Layer Security (TLS). An extension to Transport Layer Security (TLS) 1.3 to enable session migration. This mechanism is designed for network architectures, particularly for multi-homed servers that possess multiple network interfaces and IP addresses. This document also introduces a Reliable Framing Layer that operates above the TLS record layer to provide message framing, sequence numbering, acknowledgment tracking, and automatic retransmission. The Framing Layer ensures zero application data loss during TLS session migration by buffering unacknowledged data frames and retransmitting them to the new server endpoint after migration completes.