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� � � � � � m ; � � � � � � t _ - � � � � � � � l � � V b D ///////////// LastSegement- the pack/// LastSegement- /// LastSegement- the packet is the last in a series of segemented packets. /// FirstSegement- the packet is the first in a series of segemented packets. /// containing segmented data /// Continuation- the sequence count indicates the block in a series of packets /// The sequence flag indicates the interpretation of the sequence count. } } } SecondaryHeaderFlag::Unknown => 0 SecondaryHeaderFlag::Present => 1, SecondaryHeaderFlag::NotPresent => 0, match flag { fn from(flag: SecondaryHeaderFlag) -> u8 { impl From<SecondaryHeaderFlag> for u8 { } } } _ => SecondaryHeaderFlag::Unknown 1 => SecondaryHeaderFlag::Present, 0 => SecondaryHeaderFlag::NotPresent, match byte { fn from(byte: u8) -> SecondaryHeaderFlag { impl From<u8> for SecondaryHeaderFlag { } } SecondaryHeaderFlag::NotPresent fn default() -> SecondaryHeaderFlag { impl Default for SecondaryHeaderFlag { } Unknown /// for turning an integer into a SecondaryHeaderFlag. /// The secondary header flag in not valid. This should not occur, but it is included Present, /// primary header. /// A secondary header is present in the packet. The secondary header follows the NotPresent, /// is the packet's data section. /// The secondary header is not present. The bytes following the primary header pub enum SecondaryHeaderFlag { #[derive(Debug, PartialEq, Eq, Copy, Clone)] /// following the primary header (Present) or not (NotPresent). /// The secondary header flag indicates whether there is another header } } } PacketType::Unknown => 0, PacketType::Command => 1, PacketType::Data => 0, match packet_type { fn from(packet_type: PacketType) -> u8 { impl From<PacketType> for u8 { } } } _ => PacketType::Unknown 1 => PacketType::Command, 0 => PacketType::Data, match byte { fn from(byte: u8) -> PacketType { impl From<u8> for PacketType { } } PacketType::Data fn default() -> PacketType { impl Default for PacketType { } Unknown /// for encoding an integer into a packet type. /// The packet type is unknown. This should not occur, but it is included Command, /// The packet contains a command. Data, /// The packet contains telemetry data. pub enum PacketType { #[derive(Debug, PartialEq, Eq, Copy, Clone)] /// telemetry (Data) packet. /// The PacketType indicates whether the packet is a command (Command) or a pub const CCSDS_MAX_LENGTH: u32 = CCSDS_PRI_HEADER_SIZE_BYTES + CCSDS_MIN_DATA_LENGTH_BYTES + 0xFFFF; #[allow(dead_code)] /// This indicates a length field of 0xFFFF, plus a primary header, plus one byte. /// The maximum packet length of a CCSDS packet. pub const CCSDS_MIN_LENGTH: u32 = CCSDS_PRI_HEADER_SIZE_BYTES + CCSDS_MIN_DATA_LENGTH_BYTES; // mem::size_of::<PrimaryHeader>() + 1; #[allow(dead_code)] /// This is the primary header size plus 1 byte. /// The minimum packet length of a CCSDS packet. pub const CCSDS_MIN_DATA_LENGTH_BYTES: u32 = 1; #[allow(dead_code)] /// The minimum size of a CCSDS packet's data section. pub const CCSDS_PRI_HEADER_SIZE_BYTES: u32 = 6; #[allow(dead_code)] /// The CCSDS primary header size in bytes. pub const CCSDS_VERSION: u8 = 0; #[allow(dead_code)] /// The CCSDS Version (always 0 currently). use byteorder::{ByteOrder, BigEndian}; ad � � � _ , +
} } return big_header; big_header.length.0[1] = self.length.0[0]; big_header.length.0[0] = self.length.0[1]; big_header.sequence.0[1] = self.sequence.0[0]; big_header.sequence.0[0] = self.sequence.0[1]; ad - q � � f S � � � { 3 $ �
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� � � � � Q , � � � � � M G B pub fn set_sequence_type(&mut self, seq_flag: SeqFlag) { } SeqFlag::from((BigEndian::read_u16(&self.0) >> 14) as u8) pub fn sequence_type(&self) -> SeqFlag { impl SequenceWord { pub struct SequenceWord(pub [u8;2]); #[derive(Debug, Copy, Clone, Default, PartialEq, Eq)] /// to interpret the sequence count. /// It contains a sequence count and an enum that determines how /// The sequence word is the second word of the primary header. } } BigEndian::write_u16(&mut self.0, word); let word = (BigEndian::read_u16(&self.0) & 0xF800) | (apid & 0x07FF); pub fn set_apid(&mut self, apid: u16) { } return BigEndian::read_u16(&self.0) & 0x07FF; pub fn apid(&self) -> u16 { } BigEndian::write_u16(&mut self.0, word); let word = (BigEndian::read_u16(&self.0) & 0xF7FF) | ((sec_header_flag as u16) << 11); pub fn set_secondary_header_flag(&mut self, sec_header_flag: SecondaryHeaderFlag) { } return SecondaryHeaderFlag::from(((BigEndian::read_u16(&self.0) & 0x0800) >> 11) as u8); pub fn secondary_header_flag(&self) -> SecondaryHeaderFlag { } BigEndian::write_u16(&mut self.0, word); let word = (BigEndian::read_u16(&self.0) & 0xEFFF) | ((packet_type as u16) << 12); pub fn set_packet_type(&mut self, packet_type: PacketType) { } return PacketType::from(((BigEndian::read_u16(&self.0) & 0x1000) >> 12) as u8); pub fn packet_type(&self) -> PacketType { } BigEndian::write_u16(&mut self.0, word); let word = (BigEndian::read_u16(&self.0) & 0x1FFF) | (version << 13); pub fn set_version(&mut self, version: u16) { } return (BigEndian::read_u16(&self.0) & 0xE000) >> 13; pub fn version(&self) -> u16 { impl ControlWord { pub struct ControlWord(pub [u8;2]); #[derive(Debug, Copy, Clone, Default, PartialEq, Eq)] /// destination, and contents. /// * The packet's APID, indicating the packet's source, /// or telemetry packet /// * A flag indicating whether the packet is a command /// secondary header. /// * A flag indicating whether or not there is a /// * The packet's CCSDS version /// This word contains: /// The control word is the first word of the primary header. } } } SeqFlag::Unknown => 0 SeqFlag::Unsegmented => 3, SeqFlag::LastSegment => 2, SeqFlag::FirstSegment => 1, SeqFlag::Continuation => 0, match byte { fn from(byte: SeqFlag) -> u16 { impl From<SeqFlag> for u16 { } } } _ => SeqFlag::Unknown 3 => SeqFlag::Unsegmented, 2 => SeqFlag::LastSegment, 1 => SeqFlag::FirstSegment, 0 => SeqFlag::Continuation, match byte { fn from(byte: u8) -> SeqFlag { impl From<u8> for SeqFlag { } } SeqFlag::Unsegmented fn default() -> SeqFlag { impl Default for SeqFlag { } Unknown /// for encoding integers into this type. /// The sequence flag is unknown. This should not occur, but it is included Unsegmented, /// The packets is a standalone packet. Most packets are unsegmented. LastSegment, /// The packets is the last is a series of packets. FirstSegment, /// The packets is the first is a series of packets. Continuation, /// The packets is a continuation in a series of packets. pub enum SeqFlag { #[derive(Debug, PartialEq, Eq, Copy, Clone)] /// packets. /// Unsegmented- the sequence count is an incrementing counter used to distinguish ad �
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� � l k 6 � � � big_header.se big_header.sequence.0[0] = self.sequence.0[1]; big_header.control.0[1] = self.control.0[0]; big_header.control.0[0] = self.control.0[1]; let mut big_header: CcsdsPrimaryHeader = Default::default(); pub fn to_big_endian(&self) -> CcsdsPrimaryHeader { impl PrimaryHeader<LittleEndian> { } } E::write_u16(&mut self.length.0, packet_length); pub fn set_packet_length(&mut self, packet_length: u16) { /// Set the length of the packet in bytes, including the primary header. } return self.length.length_field() as u32 + CCSDS_MIN_DATA_LENGTH_BYTES; pub fn data_length(&self) -> u32 { /// packet length to exceed 65535. /// The length is returned as a u32 because the CCSDS standard allows the total /// Get the length of the data section in bytes, not including the primary header. } return self.length.length_field() as u32 + CCSDS_PRI_HEADER_SIZE_BYTES + CCSDS_MIN_DATA_LENGTH_BYTES; pub fn packet_length(&self) -> u32 { /// packet length to exceed 65535. /// The length is returned as a u32 because the CCSDS standard allows the total /// Get the length of the packet in bytes, including the primary header. } } return None; } else { return Some(PrimaryHeader::new(header_bytes)); header_bytes.copy_from_slice(&bytes[0..6]); let mut header_bytes: [u8;6] = [0; 6]; if bytes.len() >= CCSDS_PRI_HEADER_SIZE_BYTES as usize { pub fn from_slice(bytes: &[u8]) -> Option<PrimaryHeader<E>> { /// long enough then None is returned. /// Create a PrimaryHeader from a slice. If the slice is not } return pri_header; pri_header.length.0[1] = bytes[5]; pri_header.length.0[0] = bytes[4]; pri_header.sequence.0[1] = bytes[3]; pri_header.sequence.0[0] = bytes[2]; pri_header.control.0[1] = bytes[1]; pri_header.control.0[0] = bytes[0]; // copy the array byte-for-byte into the primary header let mut pri_header: PrimaryHeader<E> = Default::default(); pub fn new(bytes: [u8;6]) -> PrimaryHeader<E> { /// Create a new PrimaryHeader from raw bytes. impl<E: ByteOrder> PrimaryHeader<E> { } pub endianness: PhantomData<E>, pub length: LengthWord<E>, pub sequence: SequenceWord<E>, pub control: ControlWord<E>, pub struct PrimaryHeader<E> { #[derive(Debug, Clone, Copy, Default, PartialEq, Eq)] #[repr(C)] /// Its representation in memory matches the CCSDS standard. /// The PrimaryHeader struct represents a CCSDS Primary header. pub type CcsdsPrimaryHeader = PrimaryHeader<BigEndian>; /// BigEndian. /// The CcsdsPrimaryHeader is a PrimaryHeader that is } } E::write_u16(&mut self.0, length); pub fn set_length_field(&mut self, length: u16) { } return E::rimpl LengthWord { /// The sequence word is the third word of the primary header. pub struct LengthWord(pub [u8;2]); #[derive(Debug, Copy, Clone, Default, PartialEq, Eq)] /// it is wrapped in a struct for consistency with the other fields. /// The length word of the CCSDS header. This is just a u16, but } } BigEndian::write_u16(&mut self.0, word); let word = (BigEndian::read_u16(&self.0) & 0xC000) | (seq_count & 0x3FFF); pub fn set_sequence_count(&mut self, seq_count: u16) { } BigEndian::read_u16(&self.0) & 0x3FFF pub fn sequence_count(&self) -> u16 { } BigEndian::write_u16(&mut self.0, word); let word = (BigEndian::read_u16(&self.0) & 0x3FFF) | (u16::from(seq_flag) << 14); ad N n C � � � � n ; 5 3 2 � � � t Y 8 �
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� � � Y 2 � � � = � � � J D C � � w q o n M L � � � G F � � big_he big_header.sequence.0[0] = self.sequence.0[1]; big_header.control.0[1] = self.control.0[0]; big_header.control.0[0] = self.control.0[1]; let mut big_header: CcsdsPrimaryHeader = Default::default(); pub fn to_big_endian(&self) -> CcsdsPrimaryHeader { impl Primar } } BigEndian::write_u16(&mut self.length } } } } BigEndian::write_u16(&mut self.length.0 } } BigEndian::write } } BigEndian::write_u16(&mut self.length.0, packet_length); pub fn set_packet_length(&mut self, packet_length: u16) { /// Set the length of the packet in bytes, including the primary header. } return self.length.length_field() as u32 + CCSDS_MIN_DATA_LENGTH_BYTES; pub fn data_length(&self) -> u32 { /// packet length to exceed 65535. /// The length is returned as a u32 because the CCSDS standard allows the total /// Get the length of the data section in bytes, not including the primary header. } return self.length.length_field() as u32 + CCSDS_PRI_HEADER_SIZE_BYTES + CCSDS_MIN_DATA_LENGTH_BYTES; pub fn packet_length(&self) -> u32 { /// packet length to exceed 65535. /// The length is returned as a u32 because the CCSDS standard allows the total /// Get the length of the packet in bytes, including the primary header. } } return None; } else { return Some(PrimaryHeader::new(header_bytes)); header_bytes.copy_from_slice(&bytes[0..6]); let mut header_bytes: [u8;6] = [0; 6]; if bytes.len() >= CCSDS_PRI_HEADER_SIZE_BYTES as usize { pub fn from_slice(bytes: &[u8]) -> Option<PrimaryHeader> { /// long enough then None is returned. /// Create a PrimaryHeader from a slice. If the slice is not } return pri_header; pri_header.length.0[1] = bytes[5]; pri_header.length.0[0] = bytes[4]; pri_header.sequence.0[1] = bytes[3]; pri_header.sequence.0[0] = bytes[2]; pri_header.control.0[1] = bytes[1]; pri_header.control.0[0] = bytes[0]; // copy the array byte-for-byte into the primary header let mut pri_header: PrimaryHeader = Default::default(); pub fn new(bytes: [u8;6]) -> PrimaryHeader { /// Create a new PrimaryHeader from raw bytes. impl PrimaryHeader { } pub length: LengthWord, pub sequence: SequenceWord, pub control: ControlWord, pub struct PrimaryHeader { #[derive(Debug, Clone, Copy, Default, PartialEq, Eq)] #[repr(C)] /// Its representation in memory matches the CCSDS standard. /// The PrimaryHeader struct represents a CCSDS Primary header. } } BigEndian::write_u16(&mut self.0, length); pub fn set_length_field(&mut self, length: u16) { } return BigEndian::read_u16(&self.0); pub fn length_field(&self) -> u16 {