ccsds_primary_header 0.15.0

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        /// outside of the CC     /// outside of the CCSDS packet and used by another protocol. This is usually 0, but    /// A packet can have a footer with a fixed number of bytes, such as a CRC that is    pub keep_header: bool,    /// called when pull_packet is called, or left behind.    /// The keep header flag is used to determine if sync bytes are passed along to the    pub num_header_bytes: u32,    /// in some cases there is a prefix on each packet from another protocol.    /// A packet can have a header with a fixed number of bytes. This is usually 0, but    pub keep_sync: bool,    /// called when pull_packet is called, or left behind.    /// The keep sync flag is used to determine if sync bytes are passed along to the    pub sync_bytes: Vec<u8>,    /// packet.    /// it to be valid. This is useful when there is a sync marker before each     /// The sync bytes are a Vec of bytes that must proceed a packet for    pub secondary_header_required: bool,    /// must have this flag set.    /// case, this flag can be set to indicate that a properly formatted packet    /// packet. For some projects, all packets have a secondary header. In this    /// The secondary header bit may or may not be set in a particular CCSDS     pub min_packet_length: Option<u32>,    /// formatted.    /// If a packet's length is below this amount, then it is considered improperly    /// or a given number of bytes. This applies to the CCSDS packet length.    /// The min packet length is either None, meaning any packet length is valid,    pub max_packet_length: Option<u32>,    /// formatted.    /// If a packet's length exceeds this amount, then it is considered improperly    /// or a given number of bytes. This applies to the CCSDS packet length.    /// The max packet length is either None, meaning any packet length is valid,    pub allowed_apids: Option<Vec<u16>>,    /// packet with an unexpected APID.    /// is considered improperly formatted, rather then being a valid    /// Note that if an APId is not in the allowed APID list, the packet    /// or a Vec of allowed APIDs.    /// The allowed APIDs list is either None, meaning any APID is valid,pub struct CcsdsParserConfig {#[derive(Debug, PartialEq, Clone)]/// manipulated independantly of a particular CcsdsParser./// This is broken out into a seprate structure to be read in, serialized, and otherwise/// The CcsdsParserConfig struct provides all configuration used by a CcsdsParser.}    SyncNotFound,    /// The sync was not found, for packets where a sync has been configured    ApidNotAllowed,    /// The APID was not in the list of allowed APIDs    SecondaryHeaderInvalid,    /// The secondary header flag was not set, when configured as a required field    InvalidCcsdsVersion,    /// The CCSDS version field was not 0    NotEnoughBytesPacketLength,    /// The buffer does not contain enough data for the packet length report in the header    BelowMinPacketLength,    /// The packet length field was smaller than the minimum configured length    ExceedsMaxPacketLength,    /// The packet length field was greater than the maximum configured length    NotEnoughBytesForHeader,    /// Buffer does not contain enough bytes to hold a CCSDS header    ValidPacket,    /// The packet is validpub enum CcsdsParserStatus {#[derive(Debug, PartialEq, Eq, Copy, Clone)]/// only enum value that indicates a valid packet is ValidPacket./// whether a packet is valid, have enough bytes, or is otherwise invalid. The /// A CcsdsParserStatus is the current state of a CcsdsParser. The parser can determineuse primary_header::*;use bytes::{Bytes, BytesMut};ad��B���LBA���~/�
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        let mut packet_length = self.current_header().unwrap().packet_length();        // not be returned        // Determine packet length, advancing past header portions if they will        }            parser_status = self.current_status();            self.reject();            // with the CCSDS header.            // assuming that we are in a region of invalid data and need to resync            // otherwise, advance 1 byte and try to validate the header again,            }                   return None;               (parser_status == CcsdsParserStatus::NotEnoughBytesPacketLength) {            if (parser_status == CcsdsParserStatus::NotEnoughBytesForHeader) ||            // then return None and wait for more bytes.            // if there is not enough data to determine whether we have a valid packet,        while parser_status != CcsdsParserStatus::ValidPacket {        let mut parser_status = self.current_status();    pub fn pull_packet(&mut self) -> Option<BytesMut> {    /// packet is present and there are not enough bytes to read it.    /// valid packet because the garbage data may indicate that a valid but long CCSDS    /// garbage in front, but contains a valid packet. The parser may not be able to find the    /// Note that this can potentially lead to a situation where the packet stream has    ///    /// more bytes are needed to decide, the current position is kept.    /// to the next packet. If the current buffer may or may not be a valid packet, but    /// or returns None if there are no valid packets. This advances the byte buffer    /// The pull_packet function retrieves the next packet from the parser,    }        self.skipped_bytes += 1;        self.bytes.advance(1);    pub fn reject(&mut self) {    /// handled by this crate, so reject is necessary feedback into the parser for these cases.    /// There can be additional checks on CCSDS packets, such as checksums or CRCs, which are not    /// inspects a packet retrieved with pull_packet and finds that it is invalid.    /// This is used internally in the parser, but is also exposed in case the calling code    /// The reject function tells the parser that the current position does not contain a packet.    }        CcsdsParserStatus::ValidPacket        }            }                return CcsdsParserStatus::ApidNotAllowed;                //self.bytes.advance(pri_header.packet_length() as usize);                // enough bytes, APID not allowed            if !apid_list.contains(&pri_header.control.apid()) {        if let Some(ref apid_list) = self.config.allowed_apids {        // check if the APID is allowed        }            return CcsdsParserStatus::SecondaryHeaderInvalid;            pri_header.control.secondary_header_flag() == SecondaryHeaderFlag::NotPresent {        if self.config.secondary_header_required &&        // packet is malformed.        // if the secondary header flag is required, but not present, assume that the        }            return CcsdsParserStatus::InvalidCcsdsVersion;        if pri_header.control.version() as u8 != CCSDS_VERSION {        // if the version is not 0, assume that the packet is malformed.        }            return CcsdsParserStatus::NotEnoughBytesPacketLength;        if self.bytes.len() < self.full_packet_length() {        }            }                return CcsdsParserStatus::BelowMinPacketLength;            if pri_header.packet_length() < min_length {        if let Some(min_length) = self.config.min_packet_length {        // a packet length that is smaller than the minimum length is not a valid packet        }            }                return CcsdsParserStatus::ExceedsMaxPacketLength;ad]�
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            if p                      if pri_header.packet_length() > max_length {        if let Some(max_length) = self.config.max_packet_length {        // a packet length that exceeds the maximum is not a valid packet        }            }                return CcsdsParserStatus::SyncNotFound;            if !self.config.sync_bytes.iter().zip(self.bytes.iter()).all(|(b0, b1)| *b0 == *b1) {        if self.config.sync_bytes.len() > 0 {        // check that, if there is a sync in front of the packet, that the data matches the sync        }            return CcsdsParserStatus::NotEnoughBytesForHeader;        } else {            pri_header = header;        if let Some(header) = self.current_header() {        // otherwise, return indicating that we need more data to have a valid header.        // if there is a header available, retrieve it.        let pri_header;    pub fn current_status(&self) -> CcsdsParserStatus {    /// The current status is the validity of the parser's current packet.    }        }            }                Some(PrimaryHeader::from_slice(&header_bytes).unwrap())            } else {                Some(PrimaryHeader::from_slice(&header_bytes).unwrap())            if self.config.little_endian_header {            header_bytes.clone_from_slice(&self.bytes[start_of_header..end_of_header]);            let mut header_bytes:[u8; 6] = [0; 6];            let end_of_header = start_of_header + CCSDS_PRI_HEADER_SIZE_BYTES as usize;            let start_of_header = self.config.sync_bytes.len() + self.config.num_header_bytes as usize;        } else {            None        if self.bytes.len() < min_length as usize {                         self.config.sync_bytes.len() as u32;                         self.config.num_footer_bytes +                         self.config.num_header_bytes +        let min_length = CCSDS_MIN_LENGTH      +    pub fn current_header(&self) -> Option<PrimaryHeader> {    /// if one is available.    /// The current header function extracts the primary header from a parser    }        self.bytes.extend_from_slice(new_bytes);    pub fn recv_slice(&mut self, new_bytes: &[u8]) {    /// not get a full packet, or we may get multiple packets.    /// parser. These may come from a byte stream such as TCP, where we may or may    /// The recv_slice function allows the user to feed additional bytes to a    }        self.bytes.extend(new_bytes);    pub fn recv_bytes(&mut self, new_bytes: Bytes) {    /// not get a full packet, or we may get multiple packets.    /// parser. These may come from a byte stream such as TCP, where we may or may    /// The recv_bytes function allows the user to feed additional bytes to a    }        }            },                apids.push(apid);            Some(ref mut apids) => {            },                self.config.allowed_apids = Some(apids);                apids.push(apid);                let mut apids = Vec::new();            None => {        match self.config.allowed_apids {    pub fn allow_apid(&mut self, apid: u16) {    /// turned into a Vec with a single element.    /// Allow a particular APID. If the allowed_apids field is None, it is    }        }            reached_end: false,            skipped_bytes: 0,            config: config,            bytes: BytesMut::new(),        CcsdsParser {    pub fn with_config(config: CcsdsParserConfig) -> Self {    /// Create a new parser with the given configuration options.    }        }            reached_end: false,            skipped_bytes: 0,            config: CcsdsParserConfig::new(),ad�
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            bytes: BytesMut::new(),        CcsdsParser {    pub fn new() -> Self {    /// Create a new parser with default configuration options.impl CcsdsParser {*/}    }        }            },                }                    None                } else {                    }                        None                        self.reached_end = true;                    } else {                        self.pull_packet()                        self.skipped_bytes += 1;                        self.bytes.advance(1);                    if self.current_status() != CcsdsParserStatus::NotEnoughBytesForHeader {                if !self.reached_end {            None => {            },                Some(bytes)            Some(bytes) => {        match self.pull_packet() {    fn next(&mut self) -> Option<Self::Item> {    type Item = BytesMut;impl Iterator for CcsdsParser {/*/// and find another packet./// the packet processing to continue, assuming that we may then be able to look past the garbage/// then the buffer will be advanced by a byte. This allows/// may have a valid packet, but is prefixed with garbage,/// After the first None, next can be called again. In this case, if buffer////// None, then the buffer has no vaild packets./// The iterator for CcsdsParser produces CCSDS packets in turn. When it returned}    reached_end: bool,    /// the parser to know if it is being called after apparently running out of bytes.    /// This private field is used when running the parser as an iterator. This allows    pub skipped_bytes: usize,    /// of invalid data.    /// If a header cannot be found, then the parser will attempt to move past regions    /// This is the number of bytes that have been dropped while parsing CCSDS packets.    pub config: CcsdsParserConfig,    /// each packet. See CcsdsParserConfig for details.    /// such as which APIDs are allowed or whether there is a header or footer on     /// The config field provides configuration for how to read out Ccsds packets,    pub bytes: BytesMut,    /// recv_bytes or recv_slice.    /// A byte buffer to pull packets from. This can be fed more bytes withpub struct CcsdsParser {/// passes the configured conditions for validaity./// indicating whether there are enough bytes, and if so whether the packet/// The parser will return a CcsdsParserStatus describing the current packet-////// provided as a BytesMut without copying./// fed bytes. At any time it can be queried for packets, which will be/// for CCSDS packets. The parser is created and configured, and then can be/// A CcsdsParser is a configuration and a byte buffer which can be queried}    }        }            little_endian_header: false,            keep_footer: false,            num_footer_bytes: 0,            keep_header: false,            num_header_bytes: 0,            keep_sync: false,            sync_bytes: Vec::new(),            secondary_header_required: false,            min_packet_length: None,            max_packet_length: None,            allowed_apids: None,        CcsdsParserConfig {    pub fn new() -> CcsdsParserConfig {impl CcsdsParserConfig {}    pub little_endian_header: bool,    /// to be parsed.    /// The CCSDS header is big endian in the standard, but allow little endian headers    pub keep_footer: bool,    /// called when pull_packet is called, or left behind.    /// The keep footer flag is used to determine if sync bytes are passed along to the    pub num_footer_bytes: u32,    /// in some cases there is a prefix on each packet from another protocol.