http://www.rfc-editor.org/rfc/rfc7915.txt
RFC 7915: IP/ICMP Translation Algorithm, C. Bao, X. Li, F. Baker, T. Anderson, F. Gont2016-06-01T23:00:00-00:00This document describes the Stateless IP/ICMP Translation Algorithm (SIIT), which translates between IPv4 and IPv6 packet headers (including ICMP headers). This document obsoletes RFC 6145.