This patch provides UDP encapsulation of ESP packets over IPv6.
It mostly consist of porting IPv4 code to IPv6 and adding support of IPv6 in udpencap.c
As required by the RFC and unlike in IPv4 encapsulation, UDP checksums are calculated
Test Plan for this change:
After enabling UDP encapsulation with NAT66, verify pings are correctly
encapsulated in UDP, as well as other data (ssh, netcat thru IPSec Tunnel).
Co-authored-by: Xavier Beaudouin <xavier.beaudouin@klarasystems.com>
Sponsored-by: Stormshield
Sponsored-by: Wiktel
Sponsored-by: Klara Inc.