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spacepackets/src/tc.rs
Robin Mueller 09b305f529
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better names for lifetimes
2023-01-10 16:19:21 +01:00

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//! This module contains all components required to create a ECSS PUS C telecommand packets according
//! to [ECSS-E-ST-70-41C](https://ecss.nl/standard/ecss-e-st-70-41c-space-engineering-telemetry-and-telecommand-packet-utilization-15-april-2016/).
//!
//! # Examples
//!
//! ```rust
//! use spacepackets::{CcsdsPacket, SpHeader};
//! use spacepackets::tc::{PusTc, PusTcSecondaryHeader};
//! use spacepackets::ecss::PusPacket;
//!
//! // Create a ping telecommand with no user application data
//! let mut sph = SpHeader::tc_unseg(0x02, 0x34, 0).unwrap();
//! let tc_header = PusTcSecondaryHeader::new_simple(17, 1);
//! let pus_tc = PusTc::new(&mut sph, tc_header, None, true);
//! println!("{:?}", pus_tc);
//! assert_eq!(pus_tc.service(), 17);
//! assert_eq!(pus_tc.subservice(), 1);
//! assert_eq!(pus_tc.apid(), 0x02);
//!
//! // Serialize TC into a raw buffer
//! let mut test_buf: [u8; 32] = [0; 32];
//! let size = pus_tc
//! .write_to_bytes(test_buf.as_mut_slice())
//! .expect("Error writing TC to buffer");
//! assert_eq!(size, 13);
//! println!("{:?}", &test_buf[0..size]);
//!
//! // Deserialize from the raw byte representation
//! let pus_tc_deserialized = PusTc::from_bytes(&test_buf).expect("Deserialization failed");
//! assert_eq!(pus_tc.service(), 17);
//! assert_eq!(pus_tc.subservice(), 1);
//! assert_eq!(pus_tc.apid(), 0x02);
//! ```
use crate::ecss::{
ccsds_impl, crc_from_raw_data, crc_procedure, sp_header_impls, user_data_from_raw,
verify_crc16_from_raw, CrcType, PusError, PusPacket, PusVersion, CRC_CCITT_FALSE,
};
use crate::SpHeader;
use crate::{
ByteConversionError, CcsdsPacket, PacketType, SequenceFlags, SizeMissmatch, CCSDS_HEADER_LEN,
};
use core::mem::size_of;
use delegate::delegate;
#[cfg(feature = "serde")]
use serde::{Deserialize, Serialize};
use zerocopy::AsBytes;
#[cfg(feature = "alloc")]
use alloc::vec::Vec;
/// PUS C secondary header length is fixed
pub const PUC_TC_SECONDARY_HEADER_LEN: usize = size_of::<zc::PusTcSecondaryHeader>();
pub const PUS_TC_MIN_LEN_WITHOUT_APP_DATA: usize =
CCSDS_HEADER_LEN + PUC_TC_SECONDARY_HEADER_LEN + size_of::<CrcType>();
const PUS_VERSION: PusVersion = PusVersion::PusC;
#[derive(Copy, Clone, PartialEq, Debug)]
enum AckOpts {
Acceptance = 0b1000,
Start = 0b0100,
Progress = 0b0010,
Completion = 0b0001,
}
pub const ACK_ALL: u8 = AckOpts::Acceptance as u8
| AckOpts::Start as u8
| AckOpts::Progress as u8
| AckOpts::Completion as u8;
pub trait GenericPusTcSecondaryHeader {
fn pus_version(&self) -> PusVersion;
fn ack_flags(&self) -> u8;
fn service(&self) -> u8;
fn subservice(&self) -> u8;
fn source_id(&self) -> u16;
}
pub mod zc {
use crate::ecss::{PusError, PusVersion};
use crate::tc::GenericPusTcSecondaryHeader;
use zerocopy::{AsBytes, FromBytes, NetworkEndian, Unaligned, U16};
#[derive(FromBytes, AsBytes, Unaligned)]
#[repr(C)]
pub struct PusTcSecondaryHeader {
version_ack: u8,
service: u8,
subservice: u8,
source_id: U16<NetworkEndian>,
}
impl TryFrom<crate::tc::PusTcSecondaryHeader> for PusTcSecondaryHeader {
type Error = PusError;
fn try_from(value: crate::tc::PusTcSecondaryHeader) -> Result<Self, Self::Error> {
if value.version != PusVersion::PusC {
return Err(PusError::VersionNotSupported(value.version));
}
Ok(PusTcSecondaryHeader {
version_ack: ((value.version as u8) << 4) | value.ack,
service: value.service,
subservice: value.subservice,
source_id: U16::from(value.source_id),
})
}
}
impl GenericPusTcSecondaryHeader for PusTcSecondaryHeader {
fn pus_version(&self) -> PusVersion {
PusVersion::try_from(self.version_ack >> 4 & 0b1111).unwrap_or(PusVersion::Invalid)
}
fn ack_flags(&self) -> u8 {
self.version_ack & 0b1111
}
fn service(&self) -> u8 {
self.service
}
fn subservice(&self) -> u8 {
self.subservice
}
fn source_id(&self) -> u16 {
self.source_id.get()
}
}
impl PusTcSecondaryHeader {
pub fn write_to_bytes(&self, slice: &mut [u8]) -> Option<()> {
self.write_to(slice)
}
pub fn from_bytes(slice: &[u8]) -> Option<Self> {
Self::read_from(slice)
}
}
}
#[derive(PartialEq, Eq, Copy, Clone, Debug)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
pub struct PusTcSecondaryHeader {
pub service: u8,
pub subservice: u8,
pub source_id: u16,
pub ack: u8,
pub version: PusVersion,
}
impl GenericPusTcSecondaryHeader for PusTcSecondaryHeader {
fn pus_version(&self) -> PusVersion {
self.version
}
fn ack_flags(&self) -> u8 {
self.ack
}
fn service(&self) -> u8 {
self.service
}
fn subservice(&self) -> u8 {
self.subservice
}
fn source_id(&self) -> u16 {
self.source_id
}
}
impl TryFrom<zc::PusTcSecondaryHeader> for PusTcSecondaryHeader {
type Error = ();
fn try_from(value: zc::PusTcSecondaryHeader) -> Result<Self, Self::Error> {
Ok(PusTcSecondaryHeader {
service: value.service(),
subservice: value.subservice(),
source_id: value.source_id(),
ack: value.ack_flags(),
version: PUS_VERSION,
})
}
}
impl PusTcSecondaryHeader {
pub fn new_simple(service: u8, subservice: u8) -> Self {
PusTcSecondaryHeader {
service,
subservice,
ack: ACK_ALL,
source_id: 0,
version: PusVersion::PusC,
}
}
pub fn new(service: u8, subservice: u8, ack: u8, source_id: u16) -> Self {
PusTcSecondaryHeader {
service,
subservice,
ack: ack & 0b1111,
source_id,
version: PusVersion::PusC,
}
}
}
/// This class models a PUS telecommand. It is the primary data structure to generate the raw byte
/// representation of a PUS telecommand or to deserialize from one from raw bytes.
///
/// This class also derives the [serde::Serialize] and [serde::Deserialize] trait if the
/// [serde] feature is used, which allows to send around TC packets in a raw byte format using a
/// serde provider like [postcard](https://docs.rs/postcard/latest/postcard/).
///
/// There is no spare bytes support yet.
#[derive(PartialEq, Eq, Copy, Clone, Debug)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
pub struct PusTc<'app_data> {
sp_header: SpHeader,
pub sec_header: PusTcSecondaryHeader,
/// If this is set to false, a manual call to [PusTc::calc_own_crc16] or
/// [PusTc::update_packet_fields] is necessary for the serialized or cached CRC16 to be valid.
pub calc_crc_on_serialization: bool,
#[cfg_attr(feature = "serde", serde(skip))]
raw_data: Option<&'app_data [u8]>,
app_data: Option<&'app_data [u8]>,
crc16: Option<u16>,
}
impl<'app_data> PusTc<'app_data> {
/// Generates a new struct instance.
///
/// # Arguments
///
/// * `sp_header` - Space packet header information. The correct packet type will be set
/// automatically
/// * `sec_header` - Information contained in the data field header, including the service
/// and subservice type
/// * `app_data` - Custom application data
/// * `set_ccsds_len` - Can be used to automatically update the CCSDS space packet data length
/// field. If this is not set to true, [PusTc::update_ccsds_data_len] can be called to set
/// the correct value to this field manually
pub fn new(
sp_header: &mut SpHeader,
sec_header: PusTcSecondaryHeader,
app_data: Option<&'app_data [u8]>,
set_ccsds_len: bool,
) -> Self {
sp_header.set_packet_type(PacketType::Tc);
sp_header.set_sec_header_flag();
let mut pus_tc = PusTc {
sp_header: *sp_header,
raw_data: None,
app_data,
sec_header,
calc_crc_on_serialization: true,
crc16: None,
};
if set_ccsds_len {
pus_tc.update_ccsds_data_len();
}
pus_tc
}
/// Simplified version of the [PusTc::new] function which allows to only specify service and
/// subservice instead of the full PUS TC secondary header.
pub fn new_simple(
sph: &mut SpHeader,
service: u8,
subservice: u8,
app_data: Option<&'app_data [u8]>,
set_ccsds_len: bool,
) -> Self {
Self::new(
sph,
PusTcSecondaryHeader::new(service, subservice, ACK_ALL, 0),
app_data,
set_ccsds_len,
)
}
pub fn sp_header(&self) -> &SpHeader {
&self.sp_header
}
pub fn len_packed(&self) -> usize {
let mut length = PUS_TC_MIN_LEN_WITHOUT_APP_DATA;
if let Some(app_data) = self.app_data {
length += app_data.len();
}
length
}
pub fn set_ack_field(&mut self, ack: u8) -> bool {
if ack > 0b1111 {
return false;
}
self.sec_header.ack = ack & 0b1111;
true
}
pub fn set_source_id(&mut self, source_id: u16) {
self.sec_header.source_id = source_id;
}
sp_header_impls!();
/// Calculate the CCSDS space packet data length field and sets it
/// This is called automatically if the `set_ccsds_len` argument in the [PusTc::new] call was
/// used.
/// If this was not done or the application data is set or changed after construction,
/// this function needs to be called to ensure that the data length field of the CCSDS header
/// is set correctly.
pub fn update_ccsds_data_len(&mut self) {
self.sp_header.data_len =
self.len_packed() as u16 - size_of::<crate::zc::SpHeader>() as u16 - 1;
}
/// This function should be called before the TC packet is serialized if
/// [PusTc::calc_crc_on_serialization] is set to False. It will calculate and cache the CRC16.
pub fn calc_own_crc16(&mut self) {
let mut digest = CRC_CCITT_FALSE.digest();
let sph_zc = crate::zc::SpHeader::from(self.sp_header);
digest.update(sph_zc.as_bytes());
let pus_tc_header = zc::PusTcSecondaryHeader::try_from(self.sec_header).unwrap();
digest.update(pus_tc_header.as_bytes());
if let Some(app_data) = self.app_data {
digest.update(app_data);
}
self.crc16 = Some(digest.finalize())
}
/// This helper function calls both [PusTc::update_ccsds_data_len] and [PusTc::calc_own_crc16].
pub fn update_packet_fields(&mut self) {
self.update_ccsds_data_len();
self.calc_own_crc16();
}
/// Write the raw PUS byte representation to a provided buffer.
pub fn write_to_bytes(&self, slice: &mut [u8]) -> Result<usize, PusError> {
let mut curr_idx = 0;
let tc_header_len = size_of::<zc::PusTcSecondaryHeader>();
let total_size = self.len_packed();
if total_size > slice.len() {
return Err(ByteConversionError::ToSliceTooSmall(SizeMissmatch {
found: slice.len(),
expected: total_size,
})
.into());
}
self.sp_header.write_to_be_bytes(slice)?;
curr_idx += CCSDS_HEADER_LEN;
let sec_header = zc::PusTcSecondaryHeader::try_from(self.sec_header).unwrap();
sec_header
.write_to_bytes(&mut slice[curr_idx..curr_idx + tc_header_len])
.ok_or(ByteConversionError::ZeroCopyToError)?;
curr_idx += tc_header_len;
if let Some(app_data) = self.app_data {
slice[curr_idx..curr_idx + app_data.len()].copy_from_slice(app_data);
curr_idx += app_data.len();
}
let crc16 = crc_procedure(
self.calc_crc_on_serialization,
&self.crc16,
0,
curr_idx,
slice,
)?;
slice[curr_idx..curr_idx + 2].copy_from_slice(crc16.to_be_bytes().as_slice());
curr_idx += 2;
Ok(curr_idx)
}
#[cfg(feature = "alloc")]
#[cfg_attr(doc_cfg, doc(cfg(feature = "alloc")))]
pub fn append_to_vec(&self, vec: &mut Vec<u8>) -> Result<usize, PusError> {
let sph_zc = crate::zc::SpHeader::from(self.sp_header);
let mut appended_len = PUS_TC_MIN_LEN_WITHOUT_APP_DATA;
if let Some(app_data) = self.app_data {
appended_len += app_data.len();
};
let start_idx = vec.len();
let mut ser_len = 0;
vec.extend_from_slice(sph_zc.as_bytes());
ser_len += sph_zc.as_bytes().len();
// The PUS version is hardcoded to PUS C
let pus_tc_header = zc::PusTcSecondaryHeader::try_from(self.sec_header).unwrap();
vec.extend_from_slice(pus_tc_header.as_bytes());
ser_len += pus_tc_header.as_bytes().len();
if let Some(app_data) = self.app_data {
vec.extend_from_slice(app_data);
ser_len += app_data.len();
}
let crc16 = crc_procedure(
self.calc_crc_on_serialization,
&self.crc16,
start_idx,
ser_len,
&vec[start_idx..ser_len],
)?;
vec.extend_from_slice(crc16.to_be_bytes().as_slice());
Ok(appended_len)
}
/// Create a [PusTc] instance from a raw slice. On success, it returns a tuple containing
/// the instance and the found byte length of the packet.
pub fn from_bytes(slice: &'app_data [u8]) -> Result<(Self, usize), PusError> {
let raw_data_len = slice.len();
if raw_data_len < PUS_TC_MIN_LEN_WITHOUT_APP_DATA {
return Err(PusError::RawDataTooShort(raw_data_len));
}
let mut current_idx = 0;
let (sp_header, _) = SpHeader::from_be_bytes(&slice[0..CCSDS_HEADER_LEN])?;
current_idx += CCSDS_HEADER_LEN;
let total_len = sp_header.total_len();
if raw_data_len < total_len || total_len < PUS_TC_MIN_LEN_WITHOUT_APP_DATA {
return Err(PusError::RawDataTooShort(raw_data_len));
}
let sec_header = zc::PusTcSecondaryHeader::from_bytes(
&slice[current_idx..current_idx + PUC_TC_SECONDARY_HEADER_LEN],
)
.ok_or(ByteConversionError::ZeroCopyFromError)?;
current_idx += PUC_TC_SECONDARY_HEADER_LEN;
let raw_data = &slice[0..total_len];
let pus_tc = PusTc {
sp_header,
sec_header: PusTcSecondaryHeader::try_from(sec_header).unwrap(),
raw_data: Some(raw_data),
app_data: user_data_from_raw(current_idx, total_len, raw_data_len, slice)?,
calc_crc_on_serialization: false,
crc16: Some(crc_from_raw_data(raw_data)?),
};
verify_crc16_from_raw(raw_data, pus_tc.crc16.expect("CRC16 invalid"))?;
Ok((pus_tc, total_len))
}
pub fn raw(&self) -> Option<&'app_data [u8]> {
self.raw_data
}
}
//noinspection RsTraitImplementation
impl CcsdsPacket for PusTc<'_> {
ccsds_impl!();
}
//noinspection RsTraitImplementation
impl PusPacket for PusTc<'_> {
delegate!(to self.sec_header {
fn pus_version(&self) -> PusVersion;
fn service(&self) -> u8;
fn subservice(&self) -> u8;
});
fn user_data(&self) -> Option<&[u8]> {
self.app_data
}
fn crc16(&self) -> Option<u16> {
self.crc16
}
}
//noinspection RsTraitImplementation
impl GenericPusTcSecondaryHeader for PusTc<'_> {
delegate!(to self.sec_header {
fn pus_version(&self) -> PusVersion;
fn service(&self) -> u8;
fn subservice(&self) -> u8;
fn source_id(&self) -> u16;
fn ack_flags(&self) -> u8;
});
}
#[cfg(all(test, feature = "std"))]
mod tests {
use crate::ecss::PusVersion::PusC;
use crate::ecss::{PusError, PusPacket};
use crate::tc::ACK_ALL;
use crate::tc::{GenericPusTcSecondaryHeader, PusTc, PusTcSecondaryHeader};
use crate::{ByteConversionError, SpHeader};
use crate::{CcsdsPacket, SequenceFlags};
use alloc::vec::Vec;
fn base_ping_tc_full_ctor() -> PusTc<'static> {
let mut sph = SpHeader::tc_unseg(0x02, 0x34, 0).unwrap();
let tc_header = PusTcSecondaryHeader::new_simple(17, 1);
PusTc::new(&mut sph, tc_header, None, true)
}
fn base_ping_tc_simple_ctor() -> PusTc<'static> {
let mut sph = SpHeader::tc_unseg(0x02, 0x34, 0).unwrap();
PusTc::new_simple(&mut sph, 17, 1, None, true)
}
fn base_ping_tc_simple_ctor_with_app_data(app_data: &'static [u8]) -> PusTc<'static> {
let mut sph = SpHeader::tc_unseg(0x02, 0x34, 0).unwrap();
PusTc::new_simple(&mut sph, 17, 1, Some(app_data), true)
}
#[test]
fn test_tc_fields() {
let pus_tc = base_ping_tc_full_ctor();
assert_eq!(pus_tc.crc16(), None);
verify_test_tc(&pus_tc, false, 13);
}
#[test]
fn test_serialization() {
let pus_tc = base_ping_tc_simple_ctor();
let mut test_buf: [u8; 32] = [0; 32];
let size = pus_tc
.write_to_bytes(test_buf.as_mut_slice())
.expect("Error writing TC to buffer");
assert_eq!(size, 13);
}
#[test]
fn test_deserialization() {
let pus_tc = base_ping_tc_simple_ctor();
let mut test_buf: [u8; 32] = [0; 32];
let size = pus_tc
.write_to_bytes(test_buf.as_mut_slice())
.expect("Error writing TC to buffer");
assert_eq!(size, 13);
let (tc_from_raw, size) =
PusTc::from_bytes(&test_buf).expect("Creating PUS TC struct from raw buffer failed");
assert_eq!(size, 13);
verify_test_tc(&tc_from_raw, false, 13);
assert!(tc_from_raw.user_data().is_none());
verify_test_tc_raw(&test_buf);
verify_crc_no_app_data(&test_buf);
}
#[test]
fn test_update_func() {
let mut sph = SpHeader::tc_unseg(0x02, 0x34, 0).unwrap();
let mut tc = PusTc::new_simple(&mut sph, 17, 1, None, false);
tc.calc_crc_on_serialization = false;
assert_eq!(tc.data_len(), 0);
tc.update_packet_fields();
assert_eq!(tc.data_len(), 6);
}
#[test]
fn test_deserialization_with_app_data() {
let pus_tc = base_ping_tc_simple_ctor_with_app_data(&[1, 2, 3]);
let mut test_buf: [u8; 32] = [0; 32];
let size = pus_tc
.write_to_bytes(test_buf.as_mut_slice())
.expect("Error writing TC to buffer");
assert_eq!(size, 16);
let (tc_from_raw, size) =
PusTc::from_bytes(&test_buf).expect("Creating PUS TC struct from raw buffer failed");
assert_eq!(size, 16);
verify_test_tc(&tc_from_raw, true, 16);
let user_data = tc_from_raw.user_data().unwrap();
assert_eq!(user_data[0], 1);
assert_eq!(user_data[1], 2);
assert_eq!(user_data[2], 3);
}
#[test]
fn test_vec_ser_deser() {
let pus_tc = base_ping_tc_simple_ctor();
let mut test_vec = Vec::new();
let size = pus_tc
.append_to_vec(&mut test_vec)
.expect("Error writing TC to vector");
assert_eq!(size, 13);
verify_test_tc_raw(&test_vec.as_slice());
verify_crc_no_app_data(&test_vec.as_slice());
}
#[test]
fn test_incorrect_crc() {
let pus_tc = base_ping_tc_simple_ctor();
let mut test_buf: [u8; 32] = [0; 32];
pus_tc
.write_to_bytes(test_buf.as_mut_slice())
.expect("Error writing TC to buffer");
test_buf[12] = 0;
let res = PusTc::from_bytes(&test_buf);
assert!(res.is_err());
let err = res.unwrap_err();
assert!(matches!(err, PusError::IncorrectCrc { .. }));
}
#[test]
fn test_manual_crc_calculation() {
let mut pus_tc = base_ping_tc_simple_ctor();
pus_tc.calc_crc_on_serialization = false;
let mut test_buf: [u8; 32] = [0; 32];
pus_tc.calc_own_crc16();
pus_tc
.write_to_bytes(test_buf.as_mut_slice())
.expect("Error writing TC to buffer");
verify_test_tc_raw(&test_buf);
verify_crc_no_app_data(&test_buf);
}
#[test]
fn test_manual_crc_calculation_no_calc_call() {
let mut pus_tc = base_ping_tc_simple_ctor();
pus_tc.calc_crc_on_serialization = false;
let mut test_buf: [u8; 32] = [0; 32];
let res = pus_tc.write_to_bytes(test_buf.as_mut_slice());
assert!(res.is_err());
let err = res.unwrap_err();
assert!(matches!(err, PusError::CrcCalculationMissing { .. }));
}
#[test]
fn test_with_application_data_vec() {
let pus_tc = base_ping_tc_simple_ctor_with_app_data(&[1, 2, 3]);
verify_test_tc(&pus_tc, true, 16);
let mut test_vec = Vec::new();
let size = pus_tc
.append_to_vec(&mut test_vec)
.expect("Error writing TC to vector");
assert_eq!(test_vec[11], 1);
assert_eq!(test_vec[12], 2);
assert_eq!(test_vec[13], 3);
assert_eq!(size, 16);
}
#[test]
fn test_write_buf_too_small() {
let pus_tc = base_ping_tc_simple_ctor();
let mut test_buf = [0; 12];
let res = pus_tc.write_to_bytes(test_buf.as_mut_slice());
assert!(res.is_err());
let err = res.unwrap_err();
match err {
PusError::ByteConversionError(err) => match err {
ByteConversionError::ToSliceTooSmall(missmatch) => {
assert_eq!(missmatch.expected, pus_tc.len_packed());
assert_eq!(missmatch.found, 12);
}
_ => panic!("Unexpected error"),
},
_ => panic!("Unexpected error"),
}
}
#[test]
fn test_with_application_data_buf() {
let pus_tc = base_ping_tc_simple_ctor_with_app_data(&[1, 2, 3]);
verify_test_tc(&pus_tc, true, 16);
let mut test_buf: [u8; 32] = [0; 32];
let size = pus_tc
.write_to_bytes(test_buf.as_mut_slice())
.expect("Error writing TC to buffer");
assert_eq!(test_buf[11], 1);
assert_eq!(test_buf[12], 2);
assert_eq!(test_buf[13], 3);
assert_eq!(size, 16);
}
#[test]
fn test_custom_setters() {
let mut pus_tc = base_ping_tc_simple_ctor();
let mut test_buf: [u8; 32] = [0; 32];
pus_tc.set_apid(0x7ff);
pus_tc.set_seq_count(0x3fff);
pus_tc.set_ack_field(0b11);
pus_tc.set_source_id(0xffff);
pus_tc.set_seq_flags(SequenceFlags::Unsegmented);
assert_eq!(pus_tc.source_id(), 0xffff);
assert_eq!(pus_tc.seq_count(), 0x3fff);
assert_eq!(pus_tc.ack_flags(), 0b11);
assert_eq!(pus_tc.apid(), 0x7ff);
assert_eq!(pus_tc.sequence_flags(), SequenceFlags::Unsegmented);
pus_tc.calc_own_crc16();
pus_tc
.write_to_bytes(test_buf.as_mut_slice())
.expect("Error writing TC to buffer");
assert_eq!(test_buf[0], 0x1f);
assert_eq!(test_buf[1], 0xff);
assert_eq!(test_buf[2], 0xff);
assert_eq!(test_buf[3], 0xff);
assert_eq!(test_buf[6], 0x23);
// Source ID 0
assert_eq!(test_buf[9], 0xff);
assert_eq!(test_buf[10], 0xff);
}
fn verify_test_tc(tc: &PusTc, has_user_data: bool, exp_full_len: usize) {
assert_eq!(PusPacket::service(tc), 17);
assert_eq!(PusPacket::subservice(tc), 1);
assert!(tc.sec_header_flag());
assert_eq!(PusPacket::pus_version(tc), PusC);
if !has_user_data {
assert_eq!(tc.user_data(), None);
}
assert_eq!(tc.seq_count(), 0x34);
assert_eq!(tc.source_id(), 0);
assert_eq!(tc.apid(), 0x02);
assert_eq!(tc.ack_flags(), ACK_ALL);
assert_eq!(tc.len_packed(), exp_full_len);
let mut comp_header = SpHeader::tc_unseg(0x02, 0x34, exp_full_len as u16 - 7).unwrap();
comp_header.set_sec_header_flag();
assert_eq!(tc.sp_header, comp_header);
}
fn verify_test_tc_raw(slice: &impl AsRef<[u8]>) {
// Reference comparison implementation:
// https://github.com/us-irs/py-spacepackets/blob/v0.13.0/tests/ecss/test_pus_tc.py
let slice = slice.as_ref();
// 0x1801 is the generic
assert_eq!(slice[0], 0x18);
// APID is 0x01
assert_eq!(slice[1], 0x02);
// Unsegmented packets
assert_eq!(slice[2], 0xc0);
// Sequence count 0x34
assert_eq!(slice[3], 0x34);
assert_eq!(slice[4], 0x00);
// Space data length of 6 equals total packet length of 13
assert_eq!(slice[5], 0x06);
// PUS Version C 0b0010 and ACK flags 0b1111
assert_eq!(slice[6], 0x2f);
// Service 17
assert_eq!(slice[7], 0x11);
// Subservice 1
assert_eq!(slice[8], 0x01);
// Source ID 0
assert_eq!(slice[9], 0x00);
assert_eq!(slice[10], 0x00);
}
fn verify_crc_no_app_data(slice: &impl AsRef<[u8]>) {
// Reference comparison implementation:
// https://github.com/us-irs/py-spacepackets/blob/v0.13.0/tests/ecss/test_pus_tc.py
let slice = slice.as_ref();
assert_eq!(slice[11], 0xee);
assert_eq!(slice[12], 0x63);
}
}
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