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spacepackets/src/cfdp/tlv.rs
Robin Mueller 83db710950
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update LV and TLV code
2023-08-16 16:27:10 +02:00

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//! Generic CFDP type-length-value (TLV) abstraction as specified in CFDP 5.1.9.
use crate::cfdp::lv::{
generic_len_check_data_serialization, generic_len_check_deserialization, Lv, MIN_LV_LEN,
};
use crate::cfdp::TlvLvError;
use crate::util::{UnsignedByteField, UnsignedByteFieldError, UnsignedEnum};
use crate::{ByteConversionError, SizeMissmatch};
use num_enum::{IntoPrimitive, TryFromPrimitive};
#[cfg(feature = "serde")]
use serde::{Deserialize, Serialize};
pub const MIN_TLV_LEN: usize = 2;
#[derive(Debug, Copy, Clone, PartialEq, Eq, TryFromPrimitive, IntoPrimitive)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[repr(u8)]
pub enum TlvType {
FilestoreRequest = 0x00,
FilestoreResponse = 0x01,
MsgToUser = 0x02,
FaultHandler = 0x04,
FlowLabel = 0x05,
EntityId = 0x06,
}
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
pub enum TlvTypeField {
Standard(TlvType),
Custom(u8),
}
#[derive(Debug, Copy, Clone, PartialEq, Eq, TryFromPrimitive, IntoPrimitive)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[repr(u8)]
pub enum FilestoreActionCode {
CreateFile = 0b0000,
DeleteFile = 0b0001,
RenameFile = 0b0010,
/// This operation appends one file to another. The first specified name will form the first
/// part of the new file and the name of the new file. This function can be used to get
/// similar functionality to the UNIX cat utility (albeit for only two files).
AppendFile = 0b0011,
/// This operation replaces the content of the first specified file with the content of
/// the secondly specified file.
ReplaceFile = 0b0100,
CreateDirectory = 0b0101,
RemoveDirectory = 0b0110,
DenyFile = 0b0111,
DenyDirectory = 0b1000,
}
impl From<u8> for TlvTypeField {
fn from(value: u8) -> Self {
match TlvType::try_from(value) {
Ok(tlv_type) => TlvTypeField::Standard(tlv_type),
Err(_) => TlvTypeField::Custom(value),
}
}
}
impl From<TlvTypeField> for u8 {
fn from(value: TlvTypeField) -> Self {
match value {
TlvTypeField::Standard(std) => std as u8,
TlvTypeField::Custom(custom) => custom,
}
}
}
/// Generic CFDP type-length-value (TLV) abstraction as specified in CFDP 5.1.9.
///
/// # Lifetimes
/// * `data`: If the TLV is generated from a raw bytestream, this will be the lifetime of
/// the raw bytestream. If the TLV is generated from a raw slice or a similar data reference,
/// this will be the lifetime of that data reference.
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
pub struct Tlv<'data> {
tlv_type_field: TlvTypeField,
#[cfg_attr(feature = "serde", serde(borrow))]
lv: Lv<'data>,
}
impl<'data> Tlv<'data> {
pub fn new(tlv_type: TlvType, data: &[u8]) -> Result<Tlv, TlvLvError> {
Ok(Tlv {
tlv_type_field: TlvTypeField::Standard(tlv_type),
lv: Lv::new(data)?,
})
}
/// Creates a TLV with an empty value field.
pub fn new_empty(tlv_type: TlvType) -> Tlv<'data> {
Tlv {
tlv_type_field: TlvTypeField::Standard(tlv_type),
lv: Lv::new_empty(),
}
}
pub fn tlv_type_field(&self) -> TlvTypeField {
self.tlv_type_field
}
pub fn write_to_bytes(&self, buf: &mut [u8]) -> Result<usize, ByteConversionError> {
generic_len_check_data_serialization(buf, self.len_value(), MIN_TLV_LEN)?;
buf[0] = self.tlv_type_field.into();
self.lv.write_to_be_bytes_no_len_check(&mut buf[1..]);
Ok(self.len_full())
}
pub fn value(&self) -> &[u8] {
self.lv.value()
}
/// Returns the length of the value part, not including the length byte.
pub fn len_value(&self) -> usize {
self.lv.len_value()
}
/// Returns the full raw length, including the length byte.
pub fn len_full(&self) -> usize {
self.lv.len_full() + 1
}
/// Checks whether the value field is empty.
pub fn is_empty(&self) -> bool {
self.lv.is_empty()
}
/// Creates a TLV give a raw bytestream. Please note that is is not necessary to pass the
/// bytestream with the exact size of the expected TLV. This function will take care
/// of parsing the length byte, and the length of the parsed TLV can be retrieved using
/// [Self::len_full].
pub fn from_bytes(buf: &'data [u8]) -> Result<Tlv<'data>, TlvLvError> {
generic_len_check_deserialization(buf, MIN_TLV_LEN)?;
let mut tlv = Self {
tlv_type_field: TlvTypeField::from(buf[0]),
lv: Lv::from_bytes(&buf[MIN_LV_LEN..])?,
};
// We re-use this field so we do not need an additional struct field to store the raw start
// of the TLV.
tlv.lv.raw_data = Some(buf);
Ok(tlv)
}
/// If the TLV was generated from a raw bytestream using [Self::from_bytes], the raw start
/// of the TLV can be retrieved with this method.
pub fn raw_data(&self) -> Option<&[u8]> {
self.lv.raw_data()
}
}
pub(crate) fn verify_tlv_type(raw_type: u8, expected_tlv_type: TlvType) -> Result<(), TlvLvError> {
let tlv_type = TlvType::try_from(raw_type)
.map_err(|_| TlvLvError::InvalidTlvTypeField((raw_type, Some(expected_tlv_type as u8))))?;
if tlv_type != expected_tlv_type {
return Err(TlvLvError::InvalidTlvTypeField((
tlv_type as u8,
Some(expected_tlv_type as u8),
)));
}
Ok(())
}
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
pub struct EntityIdTlv {
entity_id: UnsignedByteField,
}
impl EntityIdTlv {
pub fn new(entity_id: UnsignedByteField) -> Self {
Self { entity_id }
}
fn len_check(buf: &[u8]) -> Result<(), ByteConversionError> {
if buf.len() < 2 {
return Err(ByteConversionError::ToSliceTooSmall(SizeMissmatch {
found: buf.len(),
expected: 2,
}));
}
Ok(())
}
pub fn len_value(&self) -> usize {
self.entity_id.size()
}
pub fn len_full(&self) -> usize {
2 + self.entity_id.size()
}
pub fn write_to_be_bytes(&self, buf: &mut [u8]) -> Result<usize, ByteConversionError> {
Self::len_check(buf)?;
buf[0] = TlvType::EntityId as u8;
buf[1] = self.entity_id.size() as u8;
self.entity_id.write_to_be_bytes(&mut buf[2..])
}
pub fn from_bytes(buf: &[u8]) -> Result<Self, TlvLvError> {
Self::len_check(buf)?;
verify_tlv_type(buf[0], TlvType::EntityId)?;
let len = buf[1];
if len != 1 && len != 2 && len != 4 && len != 8 {
return Err(TlvLvError::InvalidValueLength(len as usize));
}
// Okay to unwrap here. The checks before make sure that the deserialization never fails
let entity_id = UnsignedByteField::new_from_be_bytes(len as usize, &buf[2..]).unwrap();
Ok(Self { entity_id })
}
/// Convert to a generic [Tlv], which also erases the programmatic type information.
pub fn to_tlv(self, buf: &mut [u8]) -> Result<Tlv, ByteConversionError> {
Self::len_check(buf)?;
self.entity_id
.write_to_be_bytes(&mut buf[2..2 + self.entity_id.size()])?;
Tlv::new(TlvType::EntityId, &buf[2..2 + self.entity_id.size()]).map_err(|e| match e {
TlvLvError::ByteConversionError(e) => e,
// All other errors are impossible.
_ => panic!("unexpected TLV error"),
})
}
}
impl<'data> TryFrom<Tlv<'data>> for EntityIdTlv {
type Error = TlvLvError;
fn try_from(value: Tlv) -> Result<Self, Self::Error> {
match value.tlv_type_field {
TlvTypeField::Standard(tlv_type) => {
if tlv_type != TlvType::EntityId {
return Err(TlvLvError::InvalidTlvTypeField((
tlv_type as u8,
Some(TlvType::EntityId as u8),
)));
}
}
TlvTypeField::Custom(val) => {
return Err(TlvLvError::InvalidTlvTypeField((
val,
Some(TlvType::EntityId as u8),
)));
}
}
if value.len_value() != 1
&& value.len_value() != 2
&& value.len_value() != 4
&& value.len_value() != 8
{
return Err(TlvLvError::InvalidValueLength(value.len_value()));
}
Ok(Self::new(
UnsignedByteField::new_from_be_bytes(value.len_value(), value.value()).map_err(
|e| match e {
UnsignedByteFieldError::ByteConversionError(e) => e,
// This can not happen, we checked for the length validity, and the data is always smaller than
// 255 bytes.
_ => panic!("unexpected error"),
},
)?,
))
}
}
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
pub struct FilestoreRequestTlv<'first_name, 'second_name> {
action_code: FilestoreActionCode,
#[cfg_attr(feature = "serde", serde(borrow))]
first_name: Lv<'first_name>,
#[cfg_attr(feature = "serde", serde(borrow))]
second_name: Option<Lv<'second_name>>,
}
impl<'first_name, 'second_name> FilestoreRequestTlv<'first_name, 'second_name> {
pub fn new_create_file(first_name: Lv<'first_name>) -> Result<Self, TlvLvError> {
Self::new(FilestoreActionCode::CreateFile, first_name, None)
}
pub fn new_delete_file(first_name: Lv<'first_name>) -> Result<Self, TlvLvError> {
Self::new(FilestoreActionCode::DeleteFile, first_name, None)
}
pub fn new_rename_file(
source_name: Lv<'first_name>,
target_name: Lv<'second_name>,
) -> Result<Self, TlvLvError> {
Self::new(
FilestoreActionCode::RenameFile,
source_name,
Some(target_name),
)
}
/// This operation appends one file to another. The first specified name will form the first
/// part of the new file and the name of the new file. This function can be used to get
/// similar functionality to the UNIX cat utility (albeit for only two files).
pub fn new_append_file(
first_file: Lv<'first_name>,
second_file: Lv<'second_name>,
) -> Result<Self, TlvLvError> {
Self::new(
FilestoreActionCode::AppendFile,
first_file,
Some(second_file),
)
}
/// This operation replaces the content of the first specified file with the content of
/// the secondly specified file. This function can be used to get similar functionality to
/// the UNIX copy (cp) utility if the target file already exists.
pub fn new_replace_file(
replaced_file: Lv<'first_name>,
new_file: Lv<'second_name>,
) -> Result<Self, TlvLvError> {
Self::new(
FilestoreActionCode::ReplaceFile,
replaced_file,
Some(new_file),
)
}
pub fn new_create_directory(dir_name: Lv<'first_name>) -> Result<Self, TlvLvError> {
Self::new(FilestoreActionCode::CreateDirectory, dir_name, None)
}
pub fn new_remove_directory(dir_name: Lv<'first_name>) -> Result<Self, TlvLvError> {
Self::new(FilestoreActionCode::RemoveDirectory, dir_name, None)
}
pub fn new_deny_file(file_name: Lv<'first_name>) -> Result<Self, TlvLvError> {
Self::new(FilestoreActionCode::DenyFile, file_name, None)
}
pub fn new_deny_directory(dir_name: Lv<'first_name>) -> Result<Self, TlvLvError> {
Self::new(FilestoreActionCode::DenyDirectory, dir_name, None)
}
/// This function will return [None] if the respective action code requires two names but
/// only one is passed. It will also returns [None] if the cumulative length of the first
/// name and the second name exceeds 255 bytes.
///
/// This is the case for the rename, append and replace filestore request.
pub fn new(
action_code: FilestoreActionCode,
first_name: Lv<'first_name>,
second_name: Option<Lv<'second_name>>,
) -> Result<Self, TlvLvError> {
let mut base_value_len = first_name.len_full();
if Self::has_second_filename(action_code) {
if second_name.is_none() {
return Err(TlvLvError::SecondNameMissing);
}
base_value_len += second_name.as_ref().unwrap().len_full();
}
if base_value_len > u8::MAX as usize {
return Err(TlvLvError::InvalidValueLength(base_value_len));
}
Ok(Self {
action_code,
first_name,
second_name,
})
}
pub fn has_second_filename(action_code: FilestoreActionCode) -> bool {
if action_code == FilestoreActionCode::RenameFile
|| action_code == FilestoreActionCode::AppendFile
|| action_code == FilestoreActionCode::ReplaceFile
{
return true;
}
false
}
pub fn action_code(&self) -> FilestoreActionCode {
self.action_code
}
pub fn first_name(&self) -> Lv<'first_name> {
self.first_name
}
pub fn second_name(&self) -> Option<Lv<'second_name>> {
self.second_name
}
pub fn len_value(&self) -> usize {
let mut len = 1 + self.first_name.len_full();
if let Some(second_name) = self.second_name {
len += second_name.len_full();
}
len
}
pub fn len_full(&self) -> usize {
2 + self.len_value()
}
pub fn write_to_bytes(&self, buf: &mut [u8]) -> Result<usize, ByteConversionError> {
if buf.len() < self.len_full() {
return Err(ByteConversionError::ToSliceTooSmall(SizeMissmatch {
found: buf.len(),
expected: self.len_full(),
}));
}
buf[0] = TlvType::FilestoreRequest as u8;
buf[1] = self.len_value() as u8;
buf[2] = (self.action_code as u8) << 4;
let mut current_idx = 3;
// Length checks were already performed.
self.first_name.write_to_be_bytes_no_len_check(
&mut buf[current_idx..current_idx + self.first_name.len_full()],
);
current_idx += self.first_name.len_full();
if let Some(second_name) = self.second_name {
second_name.write_to_be_bytes_no_len_check(
&mut buf[current_idx..current_idx + second_name.len_full()],
);
current_idx += second_name.len_full();
}
Ok(current_idx)
}
pub fn from_bytes<'longest: 'first_name + 'second_name>(
buf: &'longest [u8],
) -> Result<Self, TlvLvError> {
if buf.len() < 2 {
return Err(ByteConversionError::FromSliceTooSmall(SizeMissmatch {
found: buf.len(),
expected: 2,
})
.into());
}
verify_tlv_type(buf[0], TlvType::FilestoreRequest)?;
let len = buf[1] as usize;
let mut current_idx = 2;
let action_code = FilestoreActionCode::try_from((buf[2] >> 4) & 0b1111)
.map_err(|_| TlvLvError::InvalidFilestoreActionCode((buf[2] >> 4) & 0b1111))?;
current_idx += 1;
let first_name = Lv::from_bytes(&buf[current_idx..])?;
let mut second_name = None;
current_idx += first_name.len_full();
if Self::has_second_filename(action_code) {
if current_idx >= 2 + len {
return Err(TlvLvError::SecondNameMissing);
}
second_name = Some(Lv::from_bytes(&buf[current_idx..])?);
}
Ok(Self {
action_code,
first_name,
second_name,
})
}
}
#[cfg(test)]
mod tests {
use crate::cfdp::lv::Lv;
use crate::cfdp::tlv::{FilestoreActionCode, FilestoreRequestTlv, Tlv, TlvType, TlvTypeField};
use crate::cfdp::TlvLvError;
use crate::util::{UbfU8, UnsignedEnum};
const TLV_TEST_STR_0: &str = "hello.txt";
const TLV_TEST_STR_1: &str = "hello2.txt";
#[test]
fn test_basic() {
let entity_id = UbfU8::new(5);
let mut buf: [u8; 4] = [0; 4];
assert!(entity_id.write_to_be_bytes(&mut buf).is_ok());
let tlv_res = Tlv::new(TlvType::EntityId, &buf[0..1]);
assert!(tlv_res.is_ok());
let tlv_res = tlv_res.unwrap();
assert_eq!(
tlv_res.tlv_type_field(),
TlvTypeField::Standard(TlvType::EntityId)
);
assert_eq!(tlv_res.len_full(), 3);
assert_eq!(tlv_res.len_value(), 1);
assert!(!tlv_res.is_empty());
assert_eq!(tlv_res.value()[0], 5);
}
#[test]
fn test_serialization() {
let entity_id = UbfU8::new(5);
let mut buf: [u8; 4] = [0; 4];
assert!(entity_id.write_to_be_bytes(&mut buf).is_ok());
let tlv_res = Tlv::new(TlvType::EntityId, &buf[0..1]);
assert!(tlv_res.is_ok());
let tlv_res = tlv_res.unwrap();
let mut ser_buf: [u8; 4] = [0; 4];
assert!(tlv_res.write_to_bytes(&mut ser_buf).is_ok());
assert_eq!(ser_buf[0], TlvType::EntityId as u8);
assert_eq!(ser_buf[1], 1);
assert_eq!(ser_buf[2], 5);
}
#[test]
fn test_deserialization() {
let entity_id = UbfU8::new(5);
let mut buf: [u8; 4] = [0; 4];
assert!(entity_id.write_to_be_bytes(&mut buf[2..]).is_ok());
buf[0] = TlvType::EntityId as u8;
buf[1] = 1;
let tlv_from_raw = Tlv::from_bytes(&mut buf);
assert!(tlv_from_raw.is_ok());
let tlv_from_raw = tlv_from_raw.unwrap();
assert_eq!(
tlv_from_raw.tlv_type_field(),
TlvTypeField::Standard(TlvType::EntityId)
);
assert_eq!(tlv_from_raw.len_value(), 1);
assert_eq!(tlv_from_raw.len_full(), 3);
assert!(tlv_from_raw.value().len() > 0);
assert_eq!(tlv_from_raw.value()[0], 5);
}
#[test]
fn test_empty() {
let tlv_empty = Tlv::new_empty(TlvType::MsgToUser);
assert_eq!(tlv_empty.value().len(), 0);
assert!(tlv_empty.is_empty());
assert_eq!(tlv_empty.len_full(), 2);
assert_eq!(tlv_empty.len_value(), 0);
assert_eq!(
tlv_empty.tlv_type_field(),
TlvTypeField::Standard(TlvType::MsgToUser)
);
}
#[test]
fn test_empty_serialization() {
let tlv_empty = Tlv::new_empty(TlvType::MsgToUser);
let mut buf: [u8; 4] = [0; 4];
assert!(tlv_empty.write_to_bytes(&mut buf).is_ok());
assert_eq!(buf[0], TlvType::MsgToUser as u8);
assert_eq!(buf[1], 0);
}
#[test]
fn test_empty_deserialization() {
let mut buf: [u8; 4] = [0; 4];
buf[0] = TlvType::MsgToUser as u8;
buf[1] = 0;
let tlv_empty = Tlv::from_bytes(&buf);
assert!(tlv_empty.is_ok());
let tlv_empty = tlv_empty.unwrap();
assert!(tlv_empty.is_empty());
assert_eq!(tlv_empty.value().len(), 0);
assert_eq!(
tlv_empty.tlv_type_field(),
TlvTypeField::Standard(TlvType::MsgToUser)
);
assert_eq!(tlv_empty.len_full(), 2);
assert_eq!(tlv_empty.len_value(), 0);
}
#[test]
fn test_buf_too_large() {
let buf_too_large: [u8; u8::MAX as usize + 1] = [0; u8::MAX as usize + 1];
let tlv_res = Tlv::new(TlvType::MsgToUser, &buf_too_large);
assert!(tlv_res.is_err());
let error = tlv_res.unwrap_err();
if let TlvLvError::DataTooLarge(size) = error {
assert_eq!(size, u8::MAX as usize + 1);
} else {
panic!("unexpected error {:?}", error);
}
}
#[test]
fn test_deserialization_custom_tlv_type() {
let mut buf: [u8; 4] = [0; 4];
buf[0] = 3;
buf[1] = 1;
buf[2] = 5;
let tlv = Tlv::from_bytes(&buf);
assert!(tlv.is_ok());
let tlv = tlv.unwrap();
assert_eq!(tlv.tlv_type_field(), TlvTypeField::Custom(3));
assert_eq!(tlv.len_value(), 1);
assert_eq!(tlv.len_full(), 3);
}
fn generic_fs_request_test_one_file(
action_code: FilestoreActionCode,
) -> FilestoreRequestTlv<'static, 'static> {
assert!(!FilestoreRequestTlv::has_second_filename(action_code));
let first_name = Lv::new_from_str(TLV_TEST_STR_0).unwrap();
let fs_request = match action_code {
FilestoreActionCode::CreateFile => FilestoreRequestTlv::new_create_file(first_name),
FilestoreActionCode::DeleteFile => FilestoreRequestTlv::new_delete_file(first_name),
FilestoreActionCode::CreateDirectory => {
FilestoreRequestTlv::new_create_directory(first_name)
}
FilestoreActionCode::RemoveDirectory => {
FilestoreRequestTlv::new_remove_directory(first_name)
}
FilestoreActionCode::DenyFile => FilestoreRequestTlv::new_deny_file(first_name),
FilestoreActionCode::DenyDirectory => {
FilestoreRequestTlv::new_deny_directory(first_name)
}
_ => panic!("invalid action code"),
};
assert!(fs_request.is_ok());
let fs_request = fs_request.unwrap();
assert_eq!(fs_request.len_value(), 1 + first_name.len_full());
assert_eq!(fs_request.len_full(), fs_request.len_value() + 2);
assert_eq!(fs_request.action_code(), action_code);
assert_eq!(fs_request.first_name(), first_name);
assert_eq!(fs_request.second_name(), None);
fs_request
}
fn generic_fs_request_test_two_files(
action_code: FilestoreActionCode,
) -> FilestoreRequestTlv<'static, 'static> {
assert!(FilestoreRequestTlv::has_second_filename(action_code));
let first_name = Lv::new_from_str(TLV_TEST_STR_0).unwrap();
let second_name = Lv::new_from_str(TLV_TEST_STR_1).unwrap();
let fs_request = match action_code {
FilestoreActionCode::ReplaceFile => {
FilestoreRequestTlv::new_replace_file(first_name, second_name)
}
FilestoreActionCode::AppendFile => {
FilestoreRequestTlv::new_append_file(first_name, second_name)
}
FilestoreActionCode::RenameFile => {
FilestoreRequestTlv::new_rename_file(first_name, second_name)
}
_ => panic!("invalid action code"),
};
assert!(fs_request.is_ok());
let fs_request = fs_request.unwrap();
assert_eq!(
fs_request.len_value(),
1 + first_name.len_full() + second_name.len_full()
);
assert_eq!(fs_request.len_full(), fs_request.len_value() + 2);
assert_eq!(fs_request.action_code(), action_code);
assert_eq!(fs_request.first_name(), first_name);
assert!(fs_request.second_name().is_some());
assert_eq!(fs_request.second_name().unwrap(), second_name);
fs_request
}
#[test]
fn test_fs_request_basic_create_file() {
generic_fs_request_test_one_file(FilestoreActionCode::CreateFile);
}
#[test]
fn test_fs_request_basic_delete() {
generic_fs_request_test_one_file(FilestoreActionCode::DeleteFile);
}
#[test]
fn test_fs_request_basic_create_dir() {
generic_fs_request_test_one_file(FilestoreActionCode::CreateDirectory);
}
#[test]
fn test_fs_request_basic_remove_dir() {
generic_fs_request_test_one_file(FilestoreActionCode::RemoveDirectory);
}
#[test]
fn test_fs_request_basic_deny_file() {
generic_fs_request_test_one_file(FilestoreActionCode::DenyFile);
}
#[test]
fn test_fs_request_basic_deny_dir() {
generic_fs_request_test_one_file(FilestoreActionCode::DenyDirectory);
}
#[test]
fn test_fs_request_basic_append_file() {
generic_fs_request_test_two_files(FilestoreActionCode::AppendFile);
}
#[test]
fn test_fs_request_basic_rename_file() {
generic_fs_request_test_two_files(FilestoreActionCode::RenameFile);
}
#[test]
fn test_fs_request_basic_replace_file() {
generic_fs_request_test_two_files(FilestoreActionCode::ReplaceFile);
}
fn check_fs_request_first_part(
buf: &[u8],
action_code: FilestoreActionCode,
expected_val_len: u8,
) -> usize {
assert_eq!(buf[0], TlvType::FilestoreRequest as u8);
assert_eq!(buf[1], expected_val_len);
assert_eq!((buf[2] >> 4) & 0b1111, action_code as u8);
let lv = Lv::from_bytes(&buf[3..]);
assert!(lv.is_ok());
let lv = lv.unwrap();
assert_eq!(lv.value_as_str().unwrap().unwrap(), TLV_TEST_STR_0);
3 + lv.len_full()
}
#[test]
fn test_fs_request_serialization_one_file() {
let req = generic_fs_request_test_one_file(FilestoreActionCode::CreateFile);
let mut buf: [u8; 64] = [0; 64];
let res = req.write_to_bytes(&mut buf);
assert!(res.is_ok());
let written = res.unwrap();
assert_eq!(written, 3 + 1 + TLV_TEST_STR_0.len());
assert_eq!(written, req.len_full());
check_fs_request_first_part(
&buf,
FilestoreActionCode::CreateFile,
1 + 1 + TLV_TEST_STR_0.len() as u8,
);
}
#[test]
fn test_fs_request_deserialization_one_file() {
let req = generic_fs_request_test_one_file(FilestoreActionCode::CreateFile);
let mut buf: [u8; 64] = [0; 64];
let res = req.write_to_bytes(&mut buf);
assert!(res.is_ok());
let req_conv_back = FilestoreRequestTlv::from_bytes(&buf);
assert!(req_conv_back.is_ok());
let req_conv_back = req_conv_back.unwrap();
assert_eq!(req_conv_back, req);
}
#[test]
fn test_fs_request_serialization_two_files() {
let req = generic_fs_request_test_two_files(FilestoreActionCode::RenameFile);
let mut buf: [u8; 64] = [0; 64];
let res = req.write_to_bytes(&mut buf);
assert!(res.is_ok());
let written = res.unwrap();
assert_eq!(written, req.len_full());
assert_eq!(
written,
3 + 1 + TLV_TEST_STR_0.len() + 1 + TLV_TEST_STR_1.len()
);
let current_idx = check_fs_request_first_part(
&buf,
FilestoreActionCode::RenameFile,
1 + 1 + TLV_TEST_STR_0.len() as u8 + 1 + TLV_TEST_STR_1.len() as u8,
);
let second_lv = Lv::from_bytes(&buf[current_idx..]);
assert!(second_lv.is_ok());
let second_lv = second_lv.unwrap();
assert_eq!(second_lv.value_as_str().unwrap().unwrap(), TLV_TEST_STR_1);
assert_eq!(current_idx + second_lv.len_full(), req.len_full());
}
#[test]
fn test_fs_request_deserialization_two_files() {
let req = generic_fs_request_test_two_files(FilestoreActionCode::RenameFile);
let mut buf: [u8; 64] = [0; 64];
req.write_to_bytes(&mut buf).unwrap();
let req_conv_back = FilestoreRequestTlv::from_bytes(&buf);
assert!(req_conv_back.is_ok());
let req_conv_back = req_conv_back.unwrap();
assert_eq!(req_conv_back, req);
}
}
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