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use super::*;
use tc::{TcData, TcPacket, TcPacketHeader};
#[derive(Debug)]
pub struct Service3_5x6 {
pub(crate) n: u8,
pub(crate) report_ids: Vec<u8>,
}
const CONST_LEN_TOT: usize = 1;
impl Service3_5x6 {
fn new(n: u8, report_ids: Vec<u8>) -> Result<Self, Error> {
if report_ids.len() != n as usize {
return Err(Error::InvalidPacket);
}
Ok(Service3_5x6 { n, report_ids })
}
pub(crate) fn from_bytes(buffer: &[u8]) -> Result<Self, Error> {
if buffer.len() < CONST_LEN_TOT || buffer.len() != CONST_LEN_TOT + buffer[0] as usize {
return Err(Error::InvalidPacket);
}
let n = buffer[0];
let report_ids = buffer[1..].to_vec();
Ok(Service3_5x6 { n, report_ids })
}
pub(crate) fn to_bytes(&self) -> Vec<u8> {
let mut bytes = Vec::with_capacity(CONST_LEN_TOT + self.n as usize);
bytes.push(self.n);
bytes.extend(self.report_ids.to_vec());
bytes
}
fn get_packet_len(n: u8) -> usize {
CONST_LEN_TOT + n as usize + TcPacketHeader::TC_HEADER_LEN + PrimaryHeader::PH_LEN + PEC_LEN
}
fn header_is_tc(header: &PrimaryHeader) -> bool {
header.sec_header_flag && header.ver_no == PrimaryHeader::VER_NO && header.type_flag
}
}
impl TcData for Service3_5x6 {
}
impl SpacePacket<TcPacket<Service3_5x6>> {
pub(crate) fn new_service_3_5x6(
mes_subtype: u8,
apid: u16,
packet_name: u16,
n: u8,
report_ids: Vec<u8>,
) -> Result<Self, Error> {
if report_ids.len() != n as usize {
return Err(Error::InvalidPacket);
}
let data_len = Service3_5x6::get_packet_len(n);
let primary_header = PrimaryHeader::new(
PrimaryHeader::VER_NO,
true,
true,
apid,
(true, true),
packet_name,
(data_len - PrimaryHeader::PH_LEN - 1) as u16,
)?;
let sec_header =
TcPacketHeader::new((false, false, false, false), SERVICE_TYPE, mes_subtype, 42)?;
if mes_subtype != 5 && mes_subtype != 6 {
return Err(Error::InvalidArg);
}
let data = Service3_5x6::new(n, report_ids)?;
Ok(SpacePacket {
primary_header,
data: TcPacket {
header: sec_header,
user_data: TxUserData::<Service3_5x6> {
packet_error_control: 0,
data,
},
},
})
}
pub fn to_bytes(&self) -> Vec<u8> {
let arr_len = PrimaryHeader::PH_LEN + 1 + self.primary_header.data_len as usize;
let mut bytes = Vec::with_capacity(arr_len);
bytes.extend(self.primary_header.to_bytes().to_vec());
bytes.extend(self.data.header.to_bytes().to_vec());
bytes.extend(self.data.user_data.data.to_bytes());
bytes.push(0);
bytes.push(0);
let pec_start = arr_len - PEC_LEN;
BigEndian::write_u16(
&mut bytes[pec_start..],
self.data.user_data.packet_error_control,
);
bytes
}
pub fn from_bytes_service_3_5x6(buffer: &[u8]) -> Result<Self, Error> {
if buffer.len() < CONST_LEN_TOT {
return Err(Error::InvalidPacket);
}
let primary_header = PrimaryHeader::from_bytes(&buffer[..PrimaryHeader::PH_LEN])?;
if !Service3_5x6::header_is_tc(&primary_header) {
return Err(Error::InvalidPacket);
};
let sec_header = TcPacketHeader::from_bytes(
&buffer[PrimaryHeader::PH_LEN..PrimaryHeader::PH_LEN + TcPacketHeader::TC_HEADER_LEN],
)?;
let range_start = TcPacketHeader::TC_HEADER_LEN + PrimaryHeader::PH_LEN;
let service_data: Service3_5x6 =
Service3_5x6::from_bytes(&buffer[range_start..buffer.len() - PEC_LEN])?;
let packet_error_control = BigEndian::read_u16(&buffer[(buffer.len() - PEC_LEN)..]);
Ok(SpacePacket {
primary_header,
data: TcPacket::<Service3_5x6> {
header: sec_header,
user_data: TxUserData::<Service3_5x6> {
packet_error_control,
data: service_data,
},
},
})
}
pub fn get_report_parameter_ids(&self) -> Vec<u8> {
self.data.user_data.data.report_ids.to_vec()
}
}