X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Futil%2Fser.rs;h=37fade88835a4089faea83deeb7ff7623e8ca6d0;hb=904d3229235f3a7bc5b11d95bb0e53fbb51f0da4;hp=3de03ea5a0d5efd93b4c3a22e4d88845656dbf23;hpb=c06ab02900d454d48f75a54c8ab5c80785acbf8e;p=rust-lightning

diff --git a/lightning/src/util/ser.rs b/lightning/src/util/ser.rs
index 3de03ea5..37fade88 100644
--- a/lightning/src/util/ser.rs
+++ b/lightning/src/util/ser.rs
@@ -10,11 +10,11 @@
 //! 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;
@@ -30,10 +30,10 @@ use bitcoin::hashes::sha256d::Hash as Sha256dHash;
 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;
@@ -283,39 +283,6 @@ impl<T: Readable> From<T> for OptionDeserWrapper<T> {
 	fn from(t: T) -> OptionDeserWrapper<T> { OptionDeserWrapper(Some(t)) }
 }
 
-/// 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))
-	}
-}
-
 pub(crate) struct U48(pub u64);
 impl Writeable for U48 {
 	#[inline]
@@ -399,7 +366,8 @@ impl Readable for BigSize {
 /// 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, Eq, Debug))]
+#[cfg_attr(test, derive(PartialEq, Eq))]
+#[derive(Clone, Debug)]
 pub(crate) struct HighZeroBytesDroppedBigSize<T>(pub T);
 
 macro_rules! impl_writeable_primitive {
@@ -451,6 +419,9 @@ macro_rules! impl_writeable_primitive {
 				}
 			}
 		}
+		impl From<$val_type> for HighZeroBytesDroppedBigSize<$val_type> {
+			fn from(val: $val_type) -> Self { Self(val) }
+		}
 	}
 }
 
@@ -546,6 +517,59 @@ impl Readable for [u16; 8] {
 	}
 }
 
+/// 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,
@@ -1062,7 +1086,7 @@ impl Readable for Duration {
 #[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() {