IKEV2_PAYLOAD_IDi
set_nextpayload(ibuf_data(data), IKEV2_PAYLOAD_IDi);
firstpayload = IKEV2_PAYLOAD_IDi;
case IKEV2_PAYLOAD_IDi | IKED_E:
(!sa->sa_hdr.sh_initiator && payload == IKEV2_PAYLOAD_IDi)))