A lot of changes to improve interoperability with strongSwan. Before this change, OpenSWAN would send it's first request message, as initial conn responder, with message ID 1. The RFC is not explicit, but implies starting with ID 0. A variable was added to ipsec.conf (firstmsgid=1) to allow for backward compatibility with previous versions of OpenSWAN, which use message ID 1 in this case.
A lot of changes to improve interoperability with strongSwan. Before this change, OpenSWAN would send it's first request message, as initial conn responder, with message ID 1. The RFC is not explicit, but implies starting with ID 0. A variable was added to ipsec.conf (firstmsgid=1) to allow for backward compatibility with previous versions of OpenSWAN, which use message ID 1 in this case.