message static_info_msg {
        required uint32 addr_size       = 1;
        required uint32 cep_id_size     = 2;
        required uint32 pdu_length_size = 3;
        required uint32 seqno_size      = 4;
        required bool   has_ttl         = 5;
        required bool   has_chk         = 6;
        required uint32 min_pdu_size    = 7;
        required uint32 max_pdu_size    = 8;
        required uint32 addr_auth_type  = 9;
}