handshake sorting out (#1586)

ipc/codegen/src/codegen.rs

@@ -62,24 +62,10 @@ pub fn expand_ipc_implementation(
 	};
 
 	push_client(cx, &builder, &interface_map, push);
-	push_handshake_struct(cx, push);
 
 	push(Annotatable::Item(interface_map.item));
 }
 
-fn push_handshake_struct(cx: &ExtCtxt, push: &mut FnMut(Annotatable)) {
-	let handshake_item = quote_item!(cx,
-		#[derive(Binary)]
-		pub struct BinHandshake {
-			api_version: String,
-			protocol_version: String,
-			reserved: Vec<u8>,
-		}
-	).unwrap();
-
-	push(Annotatable::Item(handshake_item));
-}
-
 fn field_name(builder: &aster::AstBuilder, arg: &Arg) -> ast::Ident {
 	match arg.pat.node {
 		PatKind::Ident(_, ref ident, _) => builder.id(ident.node),
@@ -601,15 +587,14 @@ fn push_client_implementation(
 
 	let handshake_item = quote_impl_item!(cx,
 		pub fn handshake(&self) -> Result<(), ::ipc::Error> {
-			let payload = BinHandshake {
-				protocol_version: $item_ident::protocol_version().to_string(),
-				api_version: $item_ident::api_version().to_string(),
-				reserved: vec![0u8; 64],
+			let payload = ::ipc::Handshake {
+				protocol_version: $item_ident::protocol_version(),
+				api_version: $item_ident::api_version(),
 			};
 
 			::ipc::invoke(
 				0,
-				&Some(::ipc::binary::serialize(&payload).unwrap()),
+				&Some(::ipc::binary::serialize(&::ipc::BinHandshake::from(payload)).unwrap()),
 				&mut *self.socket.write().unwrap());
 
 			let mut result = vec![0u8; 1];
@@ -673,18 +658,15 @@ fn implement_handshake_arm(
 ) -> (ast::Arm, ast::Arm)
 {
 	let handshake_deserialize = quote_stmt!(&cx,
-		let handshake_payload = ::ipc::binary::deserialize_from::<BinHandshake, _>(r).unwrap();
+		let handshake_payload = ::ipc::binary::deserialize_from::<::ipc::BinHandshake, _>(r).unwrap();
 	);
 
 	let handshake_deserialize_buf = quote_stmt!(&cx,
-		let handshake_payload = ::ipc::binary::deserialize::<BinHandshake>(buf).unwrap();
+		let handshake_payload = ::ipc::binary::deserialize::<::ipc::BinHandshake>(buf).unwrap();
 	);
 
 	let handshake_serialize = quote_expr!(&cx,
-		::ipc::binary::serialize::<bool>(&Self::handshake(&::ipc::Handshake {
-			api_version: ::semver::Version::parse(&handshake_payload.api_version).unwrap(),
-			protocol_version: ::semver::Version::parse(&handshake_payload.protocol_version).unwrap(),
-		})).unwrap()
+		::ipc::binary::serialize::<bool>(&Self::handshake(&handshake_payload.to_semver())).unwrap()
 	);
 
 	(

ipc/rpc/Cargo.toml

@@ -8,6 +8,6 @@ license = "GPL-3.0"
 
 [dependencies]
 ethcore-devtools = { path = "../../devtools" }
-semver = "0.2.0"
 nanomsg = { git = "https://github.com/ethcore/nanomsg.rs.git" }
 ethcore-util = { path = "../../util" }
+semver = "0.2"

ipc/rpc/src/binary.rs

@@ -21,6 +21,7 @@ use util::numbers::{U256, U512, H256, H2048, Address};
 use std::mem;
 use std::collections::{VecDeque, BTreeMap};
 use std::ops::Range;
+use super::Handshake;
 
 #[derive(Debug)]
 pub struct BinaryConvertError;
@@ -554,6 +555,61 @@ macro_rules! binary_fixed_size {
 	}
 }
 
+/// Fixed-sized version of Handshake struct
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct BinHandshake {
+	api_version: BinVersion,
+	protocol_version: BinVersion,
+}
+
+/// Shorten version of semver Version without `pre` and `build` information
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct BinVersion {
+	pub major: u64,
+	pub minor: u64,
+	pub patch: u64,
+}
+
+impl From<Handshake> for BinHandshake {
+	fn from(other: Handshake) -> Self {
+		BinHandshake {
+			api_version: BinVersion::from(other.api_version),
+			protocol_version: BinVersion::from(other.protocol_version),
+		}
+	}
+}
+
+impl BinHandshake {
+	pub fn to_semver(self) -> Handshake {
+		Handshake {
+			api_version: self.api_version.to_semver(),
+			protocol_version: self.protocol_version.to_semver(),
+		}
+	}
+}
+
+impl BinVersion {
+	pub fn to_semver(self) -> ::semver::Version {
+		::semver::Version {
+			major: self.major,
+			minor: self.minor,
+			patch: self.patch,
+			pre: vec![],
+			build: vec![],
+		}
+	}
+}
+
+impl From<::semver::Version> for BinVersion {
+	fn from(other: ::semver::Version) -> Self {
+ 		BinVersion {
+			major: other.major,
+			minor: other.minor,
+			patch: other.patch,
+		}
+	}
+}
+
 binary_fixed_size!(u64);
 binary_fixed_size!(u32);
 binary_fixed_size!(usize);
@@ -564,6 +620,7 @@ binary_fixed_size!(U512);
 binary_fixed_size!(H256);
 binary_fixed_size!(H2048);
 binary_fixed_size!(Address);
+binary_fixed_size!(BinHandshake);
 
 #[test]
 fn vec_serialize() {
@@ -706,8 +763,6 @@ fn serialize_opt_vec() {
 
 #[test]
 fn serialize_opt_vec_payload() {
- 	use std::io::Cursor;
-
 	let optional_vec: Option<Vec<u8>> = None;
 	let payload = serialize(&optional_vec).unwrap();
 
@@ -776,3 +831,23 @@ fn serialize_btree() {
 
 	assert_eq!(res[&1u64], 5u64);
 }
+
+#[test]
+fn serialize_handshake() {
+	use std::io::{Cursor, SeekFrom, Seek};
+
+	let mut buff = Cursor::new(Vec::new());
+
+	let handshake = Handshake {
+		api_version: ::semver::Version::parse("1.2.0").unwrap(),
+		protocol_version: ::semver::Version::parse("1.2.0").unwrap(),
+	};
+
+	serialize_into(&BinHandshake::from(handshake.clone()), &mut buff).unwrap();
+
+	buff.seek(SeekFrom::Start(0)).unwrap();
+	let res = deserialize_from::<BinHandshake, _>(&mut buff).unwrap().to_semver();
+
+	assert_eq!(res, handshake);
+
+}

ipc/rpc/src/interface.rs

@@ -20,6 +20,7 @@ use std::io::{Read, Write};
 use std::marker::Sync;
 use semver::Version;
 
+#[derive(Debug, PartialEq, Eq, Clone)]
 /// Handshake for client and server to negotiate api/protocol version
 pub struct Handshake {
 	pub protocol_version: Version,

ipc/rpc/src/lib.rs

@@ -24,4 +24,4 @@ extern crate ethcore_util as util;
 pub mod interface;
 pub mod binary;
 pub use interface::{IpcInterface, IpcSocket, invoke, IpcConfig, Handshake, Error, WithSocket};
-pub use binary::{BinaryConvertable, BinaryConvertError};
+pub use binary::{BinaryConvertable, BinaryConvertError, BinHandshake};