http://www.rfc-editor.org/rfc/rfc6535.txt
RFC 6535: Dual-Stack Hosts Using "Bump-in-the-Host" (BIH), B. Huang, H. Deng, T. Savolainen2012-02-01T23:00:00-00:00Bump-in-the-Host (BIH) is a host-based IPv4 to IPv6 protocol translation mechanism that allows a class of IPv4-only applications that work through NATs to communicate with IPv6-only peers. The host on which applications are running may be connected to IPv6-only or dual-stack access networks. BIH hides IPv6 and makes the IPv4-only applications think they are talking with IPv4 peers by local synthesis of IPv4 addresses. This document obsoletes RFC 2767 and RFC 3338. [STANDARDS-TRACK]