//! A very simple serialization framework which is used to serialize/deserialize messages as well
//! as ChannelsManagers and ChannelMonitors.
-use prelude::*;
-use io::{self, Read, Write};
-use io_extras::{copy, sink};
+use crate::prelude::*;
+use crate::io::{self, Read, Write};
+use crate::io_extras::{copy, sink};
use core::hash::Hash;
-use sync::Mutex;
+use crate::sync::Mutex;
use core::cmp;
use core::convert::TryFrom;
use core::ops::Deref;
use bitcoin::hash_types::{Txid, BlockHash};
use core::marker::Sized;
use core::time::Duration;
-use ln::msgs::DecodeError;
-use ln::{PaymentPreimage, PaymentHash, PaymentSecret};
+use crate::ln::msgs::DecodeError;
+use crate::ln::{PaymentPreimage, PaymentHash, PaymentSecret};
-use util::byte_utils::{be48_to_array, slice_to_be48};
+use crate::util::byte_utils::{be48_to_array, slice_to_be48};
/// serialization buffer size
pub const MAX_BUF_SIZE: usize = 64 * 1024;
fn read<R: LengthRead>(reader: &mut R, params: P) -> Result<Self, DecodeError>;
}
+/// A trait that various higher-level rust-lightning types implement allowing them to be read in
+/// from a Read, requiring the implementer to provide the total length of the read.
+pub(crate) trait LengthReadable where Self: Sized
+{
+ /// Reads a Self in from the given LengthRead
+ fn read<R: LengthRead>(reader: &mut R) -> Result<Self, DecodeError>;
+}
+
/// A trait that various rust-lightning types implement allowing them to (maybe) be read in from a Read
///
/// (C-not exported) as we only export serialization to/from byte arrays instead
Ok(Self(Some(Readable::read(reader)?)))
}
}
-
-/// Wrapper to write each element of a Vec with no length prefix
-pub(crate) struct VecWriteWrapper<'a, T: Writeable>(pub &'a Vec<T>);
-impl<'a, T: Writeable> Writeable for VecWriteWrapper<'a, T> {
- #[inline]
- fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
- for ref v in self.0.iter() {
- v.write(writer)?;
- }
- Ok(())
- }
-}
-
-/// Wrapper to read elements from a given stream until it reaches the end of the stream.
-pub(crate) struct VecReadWrapper<T>(pub Vec<T>);
-impl<T: MaybeReadable> Readable for VecReadWrapper<T> {
- #[inline]
- fn read<R: Read>(mut reader: &mut R) -> Result<Self, DecodeError> {
- let mut values = Vec::new();
- loop {
- let mut track_read = ReadTrackingReader::new(&mut reader);
- match MaybeReadable::read(&mut track_read) {
- Ok(Some(v)) => { values.push(v); },
- Ok(None) => { },
- // If we failed to read any bytes at all, we reached the end of our TLV
- // stream and have simply exhausted all entries.
- Err(ref e) if e == &DecodeError::ShortRead && !track_read.have_read => break,
- Err(e) => return Err(e),
- }
- }
- Ok(Self(values))
- }
+/// When handling default_values, we want to map the default-value T directly
+/// to a OptionDeserWrapper<T> in a way that works for `field: T = t;` as
+/// well. Thus, we assume `Into<T> for T` does nothing and use that.
+impl<T: Readable> From<T> for OptionDeserWrapper<T> {
+ fn from(t: T) -> OptionDeserWrapper<T> { OptionDeserWrapper(Some(t)) }
}
pub(crate) struct U48(pub u64);
/// In TLV we occasionally send fields which only consist of, or potentially end with, a
/// variable-length integer which is simply truncated by skipping high zero bytes. This type
/// encapsulates such integers implementing Readable/Writeable for them.
-#[cfg_attr(test, derive(PartialEq, Debug))]
-pub(crate) struct HighZeroBytesDroppedVarInt<T>(pub T);
+#[cfg_attr(test, derive(PartialEq, Eq))]
+#[derive(Clone, Debug)]
+pub(crate) struct HighZeroBytesDroppedBigSize<T>(pub T);
macro_rules! impl_writeable_primitive {
($val_type:ty, $len: expr) => {
writer.write_all(&self.to_be_bytes())
}
}
- impl Writeable for HighZeroBytesDroppedVarInt<$val_type> {
+ impl Writeable for HighZeroBytesDroppedBigSize<$val_type> {
#[inline]
fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
// Skip any full leading 0 bytes when writing (in BE):
Ok(<$val_type>::from_be_bytes(buf))
}
}
- impl Readable for HighZeroBytesDroppedVarInt<$val_type> {
+ impl Readable for HighZeroBytesDroppedBigSize<$val_type> {
#[inline]
- fn read<R: Read>(reader: &mut R) -> Result<HighZeroBytesDroppedVarInt<$val_type>, DecodeError> {
+ fn read<R: Read>(reader: &mut R) -> Result<HighZeroBytesDroppedBigSize<$val_type>, DecodeError> {
// We need to accept short reads (read_len == 0) as "EOF" and handle them as simply
// the high bytes being dropped. To do so, we start reading into the middle of buf
// and then convert the appropriate number of bytes with extra high bytes out of
let first_byte = $len - ($len - total_read_len);
let mut bytes = [0; $len];
bytes.copy_from_slice(&buf[first_byte..first_byte + $len]);
- Ok(HighZeroBytesDroppedVarInt(<$val_type>::from_be_bytes(bytes)))
+ Ok(HighZeroBytesDroppedBigSize(<$val_type>::from_be_bytes(bytes)))
} else {
// If the encoding had extra zero bytes, return a failure even though we know
// what they meant (as the TLV test vectors require this)
}
}
}
+ impl From<$val_type> for HighZeroBytesDroppedBigSize<$val_type> {
+ fn from(val: $val_type) -> Self { Self(val) }
+ }
}
}
impl_array!(COMPACT_SIGNATURE_SIZE); // for Signature
impl_array!(1300); // for OnionPacket.hop_data
+impl Writeable for [u16; 8] {
+ #[inline]
+ fn write<W: Writer>(&self, w: &mut W) -> Result<(), io::Error> {
+ for v in self.iter() {
+ w.write_all(&v.to_be_bytes())?
+ }
+ Ok(())
+ }
+}
+
+impl Readable for [u16; 8] {
+ #[inline]
+ fn read<R: Read>(r: &mut R) -> Result<Self, DecodeError> {
+ let mut buf = [0u8; 16];
+ r.read_exact(&mut buf)?;
+ let mut res = [0u16; 8];
+ for (idx, v) in res.iter_mut().enumerate() {
+ *v = (buf[idx] as u16) << 8 | (buf[idx + 1] as u16)
+ }
+ Ok(res)
+ }
+}
+
+/// For variable-length values within TLV record where the length is encoded as part of the record.
+/// Used to prevent encoding the length twice.
+pub(crate) struct WithoutLength<T>(pub T);
+
+impl Writeable for WithoutLength<&String> {
+ #[inline]
+ fn write<W: Writer>(&self, w: &mut W) -> Result<(), io::Error> {
+ w.write_all(self.0.as_bytes())
+ }
+}
+impl Readable for WithoutLength<String> {
+ #[inline]
+ fn read<R: Read>(r: &mut R) -> Result<Self, DecodeError> {
+ let v: WithoutLength<Vec<u8>> = Readable::read(r)?;
+ Ok(Self(String::from_utf8(v.0).map_err(|_| DecodeError::InvalidValue)?))
+ }
+}
+impl<'a> From<&'a String> for WithoutLength<&'a String> {
+ fn from(s: &'a String) -> Self { Self(s) }
+}
+
+impl<'a, T: Writeable> Writeable for WithoutLength<&'a Vec<T>> {
+ #[inline]
+ fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
+ for ref v in self.0.iter() {
+ v.write(writer)?;
+ }
+ Ok(())
+ }
+}
+
+impl<T: MaybeReadable> Readable for WithoutLength<Vec<T>> {
+ #[inline]
+ fn read<R: Read>(mut reader: &mut R) -> Result<Self, DecodeError> {
+ let mut values = Vec::new();
+ loop {
+ let mut track_read = ReadTrackingReader::new(&mut reader);
+ match MaybeReadable::read(&mut track_read) {
+ Ok(Some(v)) => { values.push(v); },
+ Ok(None) => { },
+ // If we failed to read any bytes at all, we reached the end of our TLV
+ // stream and have simply exhausted all entries.
+ Err(ref e) if e == &DecodeError::ShortRead && !track_read.have_read => break,
+ Err(e) => return Err(e),
+ }
+ }
+ Ok(Self(values))
+ }
+}
+impl<'a, T> From<&'a Vec<T>> for WithoutLength<&'a Vec<T>> {
+ fn from(v: &'a Vec<T>) -> Self { Self(v) }
+}
+
// HashMap
impl<K, V> Writeable for HashMap<K, V>
where K: Writeable + Eq + Hash,
($bitcoin_type: ty) => {
impl Writeable for $bitcoin_type {
fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
- match self.consensus_encode(WriterWriteAdaptor(writer)) {
+ match self.consensus_encode(&mut WriterWriteAdaptor(writer)) {
Ok(_) => Ok(()),
Err(e) => Err(e),
}
/// The character set consists of ASCII alphanumeric characters, hyphens, and periods.
/// Its length is guaranteed to be representable by a single byte.
/// This serialization is used by BOLT 7 hostnames.
-#[derive(Clone, Debug, PartialEq)]
+#[derive(Clone, Debug, PartialEq, Eq)]
pub struct Hostname(String);
impl Hostname {
/// Returns the length of the hostname.
#[cfg(test)]
mod tests {
use core::convert::TryFrom;
- use util::ser::{Readable, Hostname, Writeable};
+ use crate::util::ser::{Readable, Hostname, Writeable};
#[test]
fn hostname_conversion() {