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added additional API
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This commit is contained in:
Robin Müller 2023-08-16 17:58:19 +02:00
parent 3cb19298c8
commit 081f6e840f
Signed by: muellerr
GPG Key ID: A649FB78196E3849
1 changed files with 15 additions and 3 deletions
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18
src/cfdp/tlv/msg_to_user.rs
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@ -1,7 +1,6 @@
//! Abstractions for the Message to User CFDP TLV subtype.
use delegate::delegate; use delegate::delegate;
use crate::ByteConversionError; use crate::ByteConversionError;
use super::{TlvLvError, Tlv, TlvType, TlvTypeField}; use super::{TlvLvError, Tlv, TlvType, TlvTypeField};
#[derive(Debug, Copy, Clone, PartialEq, Eq)] #[derive(Debug, Copy, Clone, PartialEq, Eq)]
@ -44,6 +43,18 @@ impl<'data> MsgToUserTlv<'data> {
Some(TlvType::MsgToUser) Some(TlvType::MsgToUser)
} }
/// Check whether this message is a reserved CFDP message like a Proxy Operation Message.
pub fn is_reserved_cfdp_msg(&self) -> bool {
if self.value().len() < 4 {
return false;
}
let value = self.value();
if value[0] == b'c' && value[1] == b'f' && value[2] == b'd' && value[3] == b'p' {
return true;
}
false
}
/// This is a thin wrapper around [Tlv::from_bytes] with the additional type check. /// This is a thin wrapper around [Tlv::from_bytes] with the additional type check.
pub fn from_bytes(buf: &'data [u8]) -> Result<MsgToUserTlv<'data>, TlvLvError> { pub fn from_bytes(buf: &'data [u8]) -> Result<MsgToUserTlv<'data>, TlvLvError> {
let msg_to_user = Self { let msg_to_user = Self {
@ -83,8 +94,9 @@ mod tests {
assert_eq!(msg_to_user.value(), custom_value); assert_eq!(msg_to_user.value(), custom_value);
assert_eq!(msg_to_user.value().len(), 4); assert_eq!(msg_to_user.value().len(), 4);
assert_eq!(msg_to_user.len_value(), 4); assert_eq!(msg_to_user.len_value(), 4);
assert_eq!(msg_to_user.len_full(), 5); assert_eq!(msg_to_user.len_full(), 6);
assert!(!msg_to_user.is_empty()); assert!(!msg_to_user.is_empty());
assert!(msg_to_user.raw_data().is_none()); assert!(msg_to_user.raw_data().is_none());
assert!(!msg_to_user.is_reserved_cfdp_msg());
} }
} }