From d910148a96cca05bc40ac5b5773effa9b92702f8 Mon Sep 17 00:00:00 2001
From: Bas van Kervel <bas@ethdev.com>
Date: Mon, 24 Aug 2015 12:22:12 +0200
Subject: [PATCH] Set ipc channel as user agent client

---
 rpc/comms/ipc.go         | 12 ++++--------
 rpc/comms/ipc_unix.go    | 23 ++++++++++++++++++++++-
 rpc/comms/ipc_windows.go | 23 ++++++++++++++++++++++-
 rpc/jeth.go              | 10 ----------
 4 files changed, 48 insertions(+), 20 deletions(-)

diff --git a/rpc/comms/ipc.go b/rpc/comms/ipc.go
index d897bf313..3de659b65 100644
--- a/rpc/comms/ipc.go
+++ b/rpc/comms/ipc.go
@@ -42,16 +42,12 @@ func (self *ipcClient) Close() {
 	self.coder.Close()
 }
 
-func (self *ipcClient) Send(req interface{}) error {
+func (self *ipcClient) Send(msg interface{}) error {
 	var err error
-	if r, ok := req.(*shared.Request); ok {
-		if err = self.coder.WriteResponse(r); err != nil {
-			if err = self.reconnect(); err == nil {
-				err = self.coder.WriteResponse(r)
-			}
+	if err = self.coder.WriteResponse(msg); err != nil {
+		if err = self.reconnect(); err == nil {
+			err = self.coder.WriteResponse(msg)
 		}
-
-		return err
 	}
 	return err
 }
diff --git a/rpc/comms/ipc_unix.go b/rpc/comms/ipc_unix.go
index 24aefa5f3..9d90da071 100644
--- a/rpc/comms/ipc_unix.go
+++ b/rpc/comms/ipc_unix.go
@@ -26,6 +26,7 @@ import (
 	"github.com/ethereum/go-ethereum/logger/glog"
 	"github.com/ethereum/go-ethereum/rpc/codec"
 	"github.com/ethereum/go-ethereum/rpc/shared"
+	"github.com/ethereum/go-ethereum/rpc/useragent"
 )
 
 func newIpcClient(cfg IpcConfig, codec codec.Codec) (*ipcClient, error) {
@@ -34,7 +35,18 @@ func newIpcClient(cfg IpcConfig, codec codec.Codec) (*ipcClient, error) {
 		return nil, err
 	}
 
-	return &ipcClient{cfg.Endpoint, c, codec, codec.New(c)}, nil
+	coder := codec.New(c)
+	msg := shared.Request{
+		Id:      0,
+		Method:  useragent.EnableUserAgentMethod,
+		Jsonrpc: shared.JsonRpcVersion,
+		Params:  []byte("[]"),
+	}
+
+	coder.WriteResponse(msg)
+	coder.Recv()
+
+	return &ipcClient{cfg.Endpoint, c, codec, coder}, nil
 }
 
 func (self *ipcClient) reconnect() error {
@@ -42,6 +54,15 @@ func (self *ipcClient) reconnect() error {
 	c, err := net.DialUnix("unix", nil, &net.UnixAddr{self.endpoint, "unix"})
 	if err == nil {
 		self.coder = self.codec.New(c)
+
+		msg := shared.Request{
+			Id:      0,
+			Method:  useragent.EnableUserAgentMethod,
+			Jsonrpc: shared.JsonRpcVersion,
+			Params:  []byte("[]"),
+		}
+		self.coder.WriteResponse(msg)
+		self.coder.Recv()
 	}
 
 	return err
diff --git a/rpc/comms/ipc_windows.go b/rpc/comms/ipc_windows.go
index b2fe2b29d..47edd9e5b 100644
--- a/rpc/comms/ipc_windows.go
+++ b/rpc/comms/ipc_windows.go
@@ -32,6 +32,7 @@ import (
 	"github.com/ethereum/go-ethereum/logger/glog"
 	"github.com/ethereum/go-ethereum/rpc/codec"
 	"github.com/ethereum/go-ethereum/rpc/shared"
+	"github.com/ethereum/go-ethereum/rpc/useragent"
 )
 
 var (
@@ -656,13 +657,33 @@ func newIpcClient(cfg IpcConfig, codec codec.Codec) (*ipcClient, error) {
 		return nil, err
 	}
 
-	return &ipcClient{cfg.Endpoint, c, codec, codec.New(c)}, nil
+	coder := codec.New(c)
+	msg := shared.Request{
+		Id:      0,
+		Method:  useragent.EnableUserAgentMethod,
+		Jsonrpc: shared.JsonRpcVersion,
+		Params:  []byte("[]"),
+	}
+
+	coder.WriteResponse(msg)
+	coder.Recv()
+
+	return &ipcClient{cfg.Endpoint, c, codec, coder}, nil
 }
 
 func (self *ipcClient) reconnect() error {
 	c, err := Dial(self.endpoint)
 	if err == nil {
 		self.coder = self.codec.New(c)
+
+		req := shared.Request{
+			Id:      0,
+			Method:  useragent.EnableUserAgentMethod,
+			Jsonrpc: shared.JsonRpcVersion,
+			Params:  []byte("[]"),
+		}
+		self.coder.WriteResponse(req)
+		self.coder.Recv()
 	}
 	return err
 }
diff --git a/rpc/jeth.go b/rpc/jeth.go
index 158bfb64c..757f6b7eb 100644
--- a/rpc/jeth.go
+++ b/rpc/jeth.go
@@ -40,16 +40,6 @@ type Jeth struct {
 }
 
 func NewJeth(ethApi shared.EthereumApi, re *jsre.JSRE, client comms.EthereumClient, fe xeth.Frontend) *Jeth {
-	// enable the jeth as the user agent
-	req := shared.Request{
-		Id:      0,
-		Method:  useragent.EnableUserAgentMethod,
-		Jsonrpc: shared.JsonRpcVersion,
-		Params:  []byte("[]"),
-	}
-	client.Send(&req)
-	client.Recv()
-
 	return &Jeth{ethApi, re, client, fe}
 }