CMD_DISCR_TLV_ENCAP
#define CMD_DISCR_LAST CMD_DISCR_TLV_ENCAP
(rtlv)->tlv.cmd_discr = CMD_DISCR_TLV_ENCAP; \
(rtlv)->tlv.cmd_discr = CMD_DISCR_TLV_ENCAP; \
#define HAS_TLV_HEADER(msg) (((struct tlv *)(msg))->cmd_discr == CMD_DISCR_TLV_ENCAP)