The TKM Diffie-Hellman plugin now maps IANA DH identifiers to TKM DH
algorithm identifiers. The mapping is specified in the daemon's
'dh_mapping' section in the strongswan.conf file:
dh_mapping {
iana_id1 = tkm_id1
iana_id2 = tkm_id2
iana_id3 = tkm_id3
...
}
Only the mapped IANA IDs are registered as supported DH groups.